Reactor Manual

EXTRACTS FROM

INSTRUCTION MANUAL

CEX CHEMICAL REACTORS TEACHING EQUIPMENT CEX

ISSUE 16 FEBRUARY 2003

INSTRUCTION MANUAL

CEX CHEMICAL REACTORS TEACHING EQUIPMENT CEX

ISSUE 16 FEBRUARY 2003

CEX CHEMICAL REACTORS SERVICE UNIT

IMPORTANT SAFETY INFORMATION All practical work areas and laboratories should be covered by local regulations which must be followed at all times. If required, Armfield can supply a typical set of laboratory safety rules. Your CEX reactor bench has been designed to be safe in use, when installed, operated and maintained in accordance with the instructions in this manual. As with any piece of sophisticated equipment, dangers may exist if the equipment is misused, mishandled or badly maintained. Water-Borne Hazards The equipment described in this instruction manual involves the use of water which under certain conditions can create a health hazard due to infection by harmful microorganisms. For example, the microscopic bacterium called Legionella pneumophila will feed on any scale, rust, algae or sludge in water and will breed rapidly if the temperature of water is between 20 and 45°C. Any water containing this bacterium which is sprayed or splashed creating air-borne droplets can produce a form of pneumonia called Legionnaires Disease which is potentially fatal. Legionella is not the only harmful micro-organism which can infect water, but it serves as a useful example of the need for cleanliness. Under the COSHH regulations, the following precautions must be observed: Any water contained within the product must not be allowed to stagnate, ie. the water must be changed regularly. Any rust, sludge, scale or algae on which micro-organisms can feed must be removed regularly, i.e. the equipment must be cleaned regularly. Where practicable the water should be maintained at a temperature below 20°C or above 45°C. If this is not practicable then the water should be disinfected if it is safe and appropriate to do so. Note that other hazards may exist in the handling of biocides used to disinfect the water. A scheme should be prepared for preventing or controlling the risk incorporating all of the actions listed above. Further details on preventing infection are contained in the publication “The Control of Legionellosis including Legionnaires Disease” - Health and Safety Series booklet HS (G) 70. ELECTRICAL SAFETY The equipment described in this Instruction Manual operates from a mains voltage electrical supply. It must be connected to a supply of the same frequency and voltage as marked on the equipment or the mains lead. If in doubt, consult a qualified electrician 1

CEX CHEMICAL REACTORS SERVICE UNIT

or contact Armfield. The equipment must not be operated with any of the panels removed. To give increased operator protection, the unit incorporates a Residual Current Device (RCD), alternatively called an Earth Leakage Circuit Breaker, as an integral part of this equipment. If through misuse or accident the equipment becomes electrically dangerous, the RCD will switch off the electrical supply and reduce the severity of any electric shock received by an operator to a level which, under normal circumstances, will not cause injury to that person. At least once each month, check that the RCD is operating correctly by pressing the TEST button. The circuit breaker MUST trip when the button is pressed. Failure to trip means that the operator is not protected and the equipment must be checked and repaired by a competent electrician before it is used. HOT SURFACES AND LIQUIDS The unit incorporates a pumped electric water heater, and is capable of producing temperatures that could cause skin burns. Before disconnecting any of the pipes or tubing: Stop all the pumps. Leave time for the water to cool Check that the temperature is at a safe level Do not touch any surfaces close to ‘Hot Surfaces’ warning labels, or any of the interconnecting tubing, whilst the equipment is in use. CHEMICAL SAFETY Details of the chemicals intended for use with this equipment are given in the Product Manuals for the different reactor options available with this equipment. Chemicals purchased by the user are normally supplied with a COSHH data sheet which provides information on safe handling, health and safety and other issues. It is important that these guidelines are adhered to. Note: -

It is the user’s responsibility to handle chemicals safely Prepare chemicals and operate the equipment in well ventilated areas Only use chemicals specified in the equipment manuals and in the concentrations recommended

2

CEX CHEMICAL REACTORS SERVICE UNIT

ARMFIELD LIMITED OPERATING INSTRUCTIONS AND EXPERIMENTS

CEX CHEMICAL REACTORS TEACHING EQUIPMENT

1. INTRODUCTION

5

2. EQUIPMENT DESCRIPTION

7

2.1 Chemical storage vessels.

7

2.2 Feed pumps

8

2.3 Stirrer control panel

8

2.4 Hot water circulator

8

2.5 Temperature control of reactor

9

2.6 Conductivity measurement of reactor contents

10

2.7 Reactor fitment

10

2.8 Mainsplate at rear of plinth

10

3. OPERATION

11

3.1 Switching-on the unit

11

3.2 Filling the feed tanks

11

3.3 Controlling the feed pumps

11

3.4 Operation of the stirrer (CEM MkII and CEB MkII)

12

3.5 Operation of temperature controller

12

3.6 Operating the console

12

3.7 Calibrating the feed pumps

13

3.8 Operating the CEM MkII

13

4. SPECIFICATIONS

14

4.1 Overall dimensions:

14

4.2 Electrical supply:

14

4.3 Pin connections

14

4.4 Miscellaneous

15

5. ROUTINE MAINTENANCE

16

5.1 General

16

5.2 RCD test

16

3

CEX CHEMICAL REACTORS SERVICE UNIT

5.3 Calibration of the conductivity sensor

16

5.4 Accessing the electrical circuits inside the plinth

17

5.5 Draining the hot water circulator

18

5.6 Temperature controller set-up

18

5.7 Priming the hot water circulator

19

6. APPENDIX 1: INSTALLATION GUIDES

20

6.1 CEM/CEX installation guide

20

6.2 CET/CEX installation guide

23

6.3 CEB/CEX installation guide

26

4

CEX CHEMICAL REACTORS SERVICE UNIT

1.

INTRODUCTION

The Armfield CEX Chemical Reactors Teaching Equipment demonstrates the characteristics of the important types of chemical reactor, batch stirred tank reactor (batch reactor), continuous stirred tank reactor (CSTR) and tubular reactor. Other types of reactor are demonstrated by separate equipment: CEU, packed bed chemical and enzymic reactors; and CEP MkII, continuous stirred tank reactors in series. The reactors available for use with CEX are as follows: -

CEB MkII CEM MkII CET MkII

batch reactor CSTR Tubular reactor

There is a mounting position on CEX for any one of the reactors above. Reactors are interchangeable. CEX is in effect the bench providing the services required by each of the reactors such as dual peristaltic pumps for feed delivery, a hot water circulator or chiller (optional) for constant temperature operation, and sensors – temperature and conductivity. CEX can be operated with the IFD6 interface device to allow computer data logging. Below CEX is shown with the CEM MkII:

CEX fitted with CEM MkII continuous stirred tank reactor

5

CEX CHEMICAL REACTORS SERVICE UNIT

6

CEX CHEMICAL REACTORS SERVICE UNIT

2.

EQUIPMENT DESCRIPTION

The chemical reactors service unit consists of a moulded ABS plinth which is used as a mounting for the Chemical reactor to be used. It also provides the ancillary services for the reactor.

Conductivity probe Temperature probe

CEM CONTINUOUS STIRRED TANK REACTOR

Stirrer plug

TO TOP OF COIL AFTER PRIMING

TEMPERATURE CONTROL

lae

0

°C

out 1

MTW 11

1

CONDUCTIVITY mS

BOTTOM OF COIL

HEAT

DATA O/P

SOL.

CHILL

FRONT VESSEL

REAR VESSEL

armfield CEX CHEMICAL REACTOR SERVICE UNIT

CEX with CEM MkII reactor fitted 2.1

Plinth

Chemical storage vessels.

The reagent tank module consists of two glass vessels mounted into a PVC base which is located on studs in the plinth and held in position by thumbnuts. Drain valves are fitted to the underside of each vessel and are accessible within the plinth trough.

Rigid standpipes are mounted in the lids of the vessels through a gland. Flexible silicone tubing is used to connect the standpipes to the pumps.

standpipes

thumbnuts

Drain valves

7

CEX CHEMICAL REACTORS SERVICE UNIT

2.2

Feed pumps

Two variable throughput peristaltic pumps are used to pump the reagents from the storage vessels to the fitted reactor. The pumps are mounted on control plates mounted on the front of the plinth. A remote control facility allows the pumps to be driven from an external 0-5V dc signal, via the data logging connector. Manual speed control

FRONT VESSEL

REAR VESSEL

Feed pumps Data logging ports

2.3

Stirrer control panel

Stirrer control panel

CEM MkII and CEB MkII reactors are equipped with agitators driven by electric motor. The control panel is located on the front of the plinth (see above). 2.4

Hot water circulator

A self contained hot water circulator is positioned on the plinth at the rear of the control console housing (see below). Flexible tubes are used to connect the circulator to each reactor. Water, heated by electrical heating element in the circulator, is sucked by a gear pump, contained within the circulator module, through the reactor heating path and into the priming vessel attached to the side of the hot water circulator. The hot water is drawn from the priming vessel and back into the hot water circulator. In this way the hot water is circulated at sub-atmospheric pressure for increased safety. The priming vessel is used to fill the circulator and reactor and also to remove air from the system.

8

CEX CHEMICAL REACTORS SERVICE UNIT

Rear view showing hot water circulator

Priming vessel

OUTPUT A.C. ~ 1A MAX

R.C.C.B

INPUT A.C. ~

O/P

PUMP

HEAT

MAINS INPUT 240V/1PH/50HZ~ CIRCULATOR

2.5

STIRRER D.C. O/P

Temperature control of reactor

Temperature control is achieved by circulation of heated or chilled water through submersed coils inside the CEM MkII, CEB MkII reactors and the CET MkII. The hot water circulator is supplied as standard with the CEX service unit whilst the chilled water circulator (CW-16) can be supplied as an accessory. A temperature sensor is designed to be used individually with the CEM MkII and the CET MkII in conjunction with the automatic temperature controller in the control console. The sensor transmits a signal to the controller which then modulates power to the heating element in the circulator, increasing or reducing the amount of heat put into the circulating water. The CEB MkII is supplied with its own temperature sensor. It is possible to run the reactors at temperatures below ambient by disconnecting the hot water circulator and connecting the flexible hoses from the chilled water circulating accessory (CW-16). A jack plug on the control console provides power to the solenoid valve of the chilled water circulator. To do this the switch on the console must be set to the “CHILL” position.

9

CEX CHEMICAL REACTORS SERVICE UNIT

Data output

TEMPERATURE CONTROL

out 1

°C 0

Temperature controller

lae

logging

MTW 11 1

CONDUCTIVITY mS

DATA O/P

Conductivity display HEAT

Output socket to drive CW16 chiller

SOL.

CHILL

armfield Ensure Mains Switch is OFF

2.6

Conductivity measurement of reactor contents

A conductivity probe is supplied to be used individually with any of the reactors. The conductivity is displayed on the meter in units of milliSiemens/cm. During a chemical reaction, the conductivity of the reacting solution changes as more of the reactants are converted. This can be monitored and used to determine the degree of conversion and the rate of conversion. The conductivity measurement is available for data logging. 2.7

Reactor fitment

Each of the three chemical reactor modules is mounted on identical PVC baseplates which are designed to stand on the plinth in the space provided and to be secured to the base by thumbnuts. Full fitment details for each of the reactors is given in the appropriate reactor manual. 2.8

Mainsplate at rear of plinth

In order to use the unit all the circuit breakers and the RCD should be in the ON (up) position.

Mains outlet for data logger

Residual current device

Circuit breakers

OUTPUT A.C. ~ 1A MAX

HWC connection R.C.C.B

INPUT A.C. ~

O/P

PUMP HEAT

MAINS INPUT 240V/1PH/50HZ~

CIRCULATOR

Mains in connector

STIRRER D.C. O/P

Stirrer output

10

CEX CHEMICAL REACTORS SERVICE UNIT

3.

OPERATION

The apparatus must be set up in accordance with the installation sheet supplied (see Appendix A for details). Additionally, ensure that you have read the safety information at the beginning of this manual. 3.1

Switching-on the unit

The unit is switched on using the switch on the front of the unit. The circuit breakers and RCD device located at the rear of the unit should be turned on beforehand. Both the temperature controller and conductivity display should illuminate.

armfield

On/off switch

3.2

Filling the feed tanks

Lift the feed tank lids and pour solutions in from above. A drain tap is located at the base of each vessel in order to drain residual liquid.

Lid

Drain valve for each tank

3.3

Controlling the feed pumps

For normal use the feed pump is set to MANUAL and controlled using the rotary switch next to the pump head. Turning the dial clockwise increases pump speed. The pump can be switched off by reducing the pump speed to zero or by changing the switch to the REMOTE position.

FRONT VESSEL

Speed control Manual/remote switch Data logging port

11

CEX CHEMICAL REACTORS SERVICE UNIT

3.4

Operation of the stirrer (CEM MkII and CEB MkII)

Operation is similar to the two feed pumps. Speed is adjusted using the rotary switch when the selector switch is set to manual.

Manual/remote switch Speed control Data logging port

Operation of temperature controller

Temperature is displayed in °C. The setpoint temperature is shown by pressing button 1 and the value adjusted up and down using buttons 2 and 3 respectively. The display will revert to the process temperature after a short period. A light in the top left hand corner of the display (4) indicates when the controller output is active.

2

4

TEMPERATURE CONTROL

°C

out 1

0

3.5

lae

1

MTW 11 1

CONDUCTIVITY mS

3

Operating the console

When the CEX is used with the hot water circulator then switch 9 should be positioned to heat. It is used in the chill position when CEX is used in conjunction with the CW16 chiller. Also control for the CW16 chiller solenoid valve should be plugged into socket 10. Temperature in the reactor is displayed on the controller (5). The hot water circulator is turned on using switch 6. Conductivity is displayed on the meter (7) and can be remotely logged from socket 8. Note: when using the chiller the temperature controller parameters should be changed in accordance with the Routine Maintenance section.

12

TEMPERATURE CONTROL

5

out 1

°C 0

3.6

DATA O/P

lae

6

MTW 11 1

CONDUCTIVITY mS

DATA O/P

7

8 HEAT

9

SOL.

10 CHILL

CEX CHEMICAL REACTORS SERVICE UNIT

3.7

Calibrating the feed pumps

Both peristaltic pumps require calibration so that exact flow rates are known. Calibration should be carried out for both pumps since there may be small differences between them. Fill both reagent vessels. Set the feed pump to 2.0 and determine the flow rate by measuring the volume collected for a defined period. Repeat the procedure for 4.0, 6.0, 8.0 and 10.0 and plot flowrate versus pump speed. 3.8

Operating the CEM MkII

The reactor has a turbine agitator (11) and baffle (12) arrangement for efficient mixing and heat transfer. Temperature in the reactor is controlled by circulating heating or cooling liquid through the internal coil (13).

CEM CONTINUOUS STIRRED TANK REACTOR

The liquid level in the reactor is controlled by the position of the standpipe (14). This can be adjusted by loosening the back nut (15). To operate at full volume the standpipe is pushed upwards until the mark etched on the tube is level with the bottom of the back nut. A stop on the standpipe limits the lower operating limit to half the full volume. When the reactor is not being used it can be drained through the valve (16).

11

12

13

14

SCORE MARK

16

13

15

CEX CHEMICAL REACTORS SERVICE UNIT

4.

SPECIFICATIONS

4.1

Overall dimensions: Height: Width Depth

4.2

0.60m 1.00m 0.50m

Electrical supply:

Green/yellow lead Brown lead Blue lead Fuse rating Voltage Frequency

4.3

-

CEX-A Earth (Ground) Live (Hot) Neutral 13A 220-240V 50Hz

CEX-B Earth (Ground) Live (Hot) Neutral 15A 110-120V 60Hz

CEX-G Earth (Ground) Live (Hot) Neutral 13A 220V 60Hz

Pin connections

Data logging connectors. Data logging via the telephone sockets is available for Pump speeds, stirrer speed and conductivity. Pin connections are as follows: Pin 1 2 3 4 5 6

Pump 1 Reserved Not used Signal (0-5V) 0V Not used Reserved

Pump 2 Reserved Not used Signal (0-5V) 0V Not used Reserved

Stirrer speed Reserved Not used Signal (0-5V) 0V Not used Reserved

Conductivity Reserved +12V Signal (0-5V) 0V -12V Reserved

Hot water circulator connector has the following pin connections (See also electrical drawing CBM29654): Pins A-D E-H J-K L-M N-T U-V W-Z

Function 1kW supply to heater element Not used Thermostat/Level 9V to pump Not used Earth 1kW supply to heater element

14

CEX CHEMICAL REACTORS SERVICE UNIT

4.4

Miscellaneous

Peristaltic pump flow rate: Feed tank capacity

0-95 ml/min per pump 5 L per tank

15

CEX CHEMICAL REACTORS SERVICE UNIT

5.

ROUTINE MAINTENANCE

To preserve the life and efficient operation of the equipment it is important that the equipment is properly maintained. Regular maintenance of the equipment is the responsibility of the end user and must be performed by qualified personnel who understand the operation of the equipment. 5.1

General

The equipment should be disconnected from the electrical supply when not in use. After use the feed tanks, reactor vessel, sump tray and pipework should be washed through with water to remove chemical residues and then drained. 5.2

RCD test

Test the RCD by pressing the TEST button at least once a month. If the RCD button does not trip when the Test button is pressed then the equipment must not be used and should be checked by a competent electrician. 5.3

Calibration of the conductivity sensor

The conductivity conditioning circuit (which provides the reading from the conductivity probe supplied with the CEX service unit) is located on a printed circuit board inside the electrical console. This circuit is calibrated before despatch and should not require re-calibration. However, should re-calibration become necessary the appropriate calibration potentiometers can be located using the diagram below. Ensure the equipment has been connected to the electrical supply and switched on for at least 20 minutes. To access the PCB remove the front panel from the electrical console by removing the four fixing screws. It is not necessary to detach the PCB from the front panel. Disconnect the conductivity probe from the socket at the left-hand side of the electrical console. Connect an AC Voltmeter (Range AC mV) to pins 1 and 2 of the vacant socket and adjust potentiometer VR2 on the PCB to give a reading of 50 mV (RMS) on the Voltmeter (probe excitation voltage). Disconnect the Voltmeter then reconnect the probe to the appropriate socket having removed the probe from the appropriate reactor fitted to the CEX. Fill a small beaker with a Conductivity Standard (eg. 0.1M KCI giving a conductivity of 12.88 mS at 25°C) and measure the temperature of the Standard using a suitable thermometer. From the table supplied with the Standard determine the actual conductivity of the solution at the measured temperature. Immerse the probe into the Conductivity Standard in the beaker then adjust potentiometer VR1C to give a reading on the display to match the conductivity of the Standard solution.

16

CEX CHEMICAL REACTORS SERVICE UNIT

When the conditioning circuit has been re-calibrated replace the front panel of the electrical console and re-install the probe in the appropriate reactor on the CEX service unit. 5.4

Accessing the electrical circuits inside the plinth

Maintenance of the CEX service unit does not require access to the electrical circuits or components located inside the moulded plinth. However, in the event of an electrical problem, it may be necessary for a competent electrician to gain access to the inside of the mouldings as follows: Ensure that the equipment is disconnected from the electrical supply (not just switched off). Drain any liquids contained in the reagent vessels or reactors. Unscrew the channel drain valve located in the recess at the left hand end of the moulded plinth.

17

CEX CHEMICAL REACTORS SERVICE UNIT

Carefully remove the front panel from the electrical console by unscrewing the four fixings. Disconnect the electrical connections between the top and bottom plinth sections by disconnecting the appropriate connectors. Unscrew the six fixings around the periphery of the plinth top. Carefully lift the top moulded section away from the bottom moulded section and place the top section in a suitable location. The electrical circuits inside the bottom moulded plinth section are accessible. A circuit diagram showing the mains and DC electrical circuits inside the plinth is included at the rear of this manual to assist in fault finding. Should it be necessary to remove the PCB from inside the electrical console then the PCB connections diagram on page 17 shows the location and function of the electrical connectors on the PCB to aid re-assembly. Re-assembly of the top and bottom moulded plinth sections is the inverse of the above instructions. 5.5

Draining the hot water circulator

It is not necessary to drain the hot water circulator following use in normal circumstances. However, if the ambient temperature may fall below freezing, especially if it is intended to transport the equipment to a different location or the equipment is to be placed in long term storage, then the circulator should be drained to prevent damage simply by undoing the connections to the reactor and allowing the water to drain under gravity. 5.6

Temperature controller set-up

The temperature controller is a three term controller which has been set up and configured to give the optimum control capability for all three reactor modules. As well as the heating control for operating temperatures above ambient, the controller 2 °C can be used to operate a chilled water accessory (CW-16) giving reactor temperatures below ambient. 1 3 If, for any reason, the set up parameters have been altered or corrupted it will be necessary to carry out the following procedure to ensure the optimum settings are restored. out 1

lae

MTW 11

Access to the configuration mode is as follows:- Sequentially press keys (3), (1) and (2) and keep them pressed for 3 seconds.

18

CEX CHEMICAL REACTORS SERVICE UNIT

When in configuration mode the parameters can be selected by pressing key (2). To display the value press key (1) and if necessary change using keys (2) or (3). Store the new value by pressing key (1). No key activation within 10 seconds causes the instrument to switch over to basic functioning. The following are the correct parameters for the heating cycle:Parameter 1Lo 1hi 1hy 1Pb 1it 1dt 1ar 1ct 1PF 2Lo 2hi 2hy 2ct 2PF dPS 5.7

Heating 0.0 50.0 0.0 -7.5 90 60 35 04 00 -19.9 99.9 0.0 05 00 01

Cooling 0.0 50.0 0.0 3.5 90 60 35 04 00 -19.9 99.9 0.0 05 00 01

Priming the hot water circulator

After draining the hot water circulator or changing the reactor vessels it will be necessary to prime the pump again. Refer to the installation sheet supplied with the reactor and also included in the appendix of this manual.

19

CEX CHEMICAL REACTORS SERVICE UNIT

6.

APPENDIX 1: INSTALLATION GUIDES

6.1

CEM/CEX installation guide

1

MOUNTING THE FEED VESSEL ASSEMBLY

Fit the reagent vessel assembly to the CEX using the 4 locating studs and black hand nuts

2

Locating studs and fasteners

Connect the tubing on the left hand side of each of the two feed pumps to the standpipe located in each of the reagent vessels. (Left feed pump to front vessel, right feed pump to rear vessel)

MOUNTING THE HOT WATER CIRCULATOR (HWC) Rear view of CEX showing positioning of HWC Hoses on the HWC should be orientated as shown in the diagram

OUTPUT A.C. ~ 1A MAX

R.C.C.B

INPUT A.C. ~

O/P

PUMP

HEAT

MAINS INPUT 240V/1PH/50HZ~ CIRCULATOR

STIRRER D.C. O/P

The lead from the HWC plugs into the socket indicated. Carefully line up the pins in the plug with the socket. Once connected rotate the locking collar on the plug until it clicks into position

20

CEX CHEMICAL REACTORS SERVICE UNIT

3

MOUNTING THE CEM MKII ONTO THE CEX -

Conductivity probe

-

Temperature probe

CEM CONTINUOUS STIRRED TANK REACTOR

Stirrer plug

TO TOP OF COIL AFTER PRIMING

TEMPERATURE CONTROL

-

°C

out 1

0

lae

MTW 11 1

CONDUCTIVITY mS

BOTTOM OF COIL

HEAT

DATA O/P

SOL.

CHILL

FRONT VESSEL

REAR VESSEL

armfield CEX

-

CHEMICAL REACTOR SERVICE UNIT

4

Fit the CEM MkII assembly to the CEX using the 4 locating studs and black thumbnuts. The reactor is supported by 3 pillars, position the reactor on the CEX so that a single pillar support is foremost Connect the remaining two pipes from the feed pumps to the connectors on the base of the reactor as shown. Connect the conductivity probe and temperature sensor plugs to the sockets on the left hand edge of the control console. Connect the stirrer plug to the socket located on the rear of the CEX. Fit the conductivity and temperature sensors to the CEM. Each probe fits in a gland. The gland nut should be loosened to fit the probes and then tightened to secure them. Probes should reach the bottom of the reactor

CONNECTION TO ELECTRICITY SUPPLY Brown - Live (hot) Blue - Neutral (hot) Green/yellow - Earth (ground)

Check that the voltage specified on the equipment matches the supply voltage. NOTE: this unit MUST be earthed.

Ensure that circuit breakers and RCCD are ON (up) TEMPERATURE CONTROL

out 1

°C 0

lae

MTW 11 1

CONDUCTIVITY mS

HEAT

DATA O/P

SOL.

CHILL

OUTPUT A.C. ~ 1A MAX

armfield

R.C.C.B

Ensure Mains Switch is OFF

INPUT A.C. ~

O/P

PUMP HEAT

MAINS INPUT 240V/1PH/50HZ~ CIRCULATOR

21

STIRRER D.C. O/P

CEX CHEMICAL REACTORS SERVICE UNIT

5

PRIMING THE HOT WATER CIRCULATOR Connect suction pipe of the HWC to a cold water supply (preferably deionised). Switch on the mains switch on the front of the CEX. Adjust the temperature controller set-point to a temperature below ambient (see Operation instructions overleaf). Then switch on the pump switch at the side of the temperature controller.

-

-

Priming vessel

-

Suction pipe

-

6

CONNECTING THE HWC TO CEM MKII

CEM CONTINUOUS STIRRED TANK REACTOR

2

-

-

Connect suction pipe of the HWC (1) to the connection for the top of the coil (rear). Connect the supply pipe of the HWC (2) to the connection for the bottom of the coil (front). Turn on the mains switch and then the pump switch and refill the HWC expansion tank as required.

1

7

CONNECTING TO THE DATA LOGGER (OPTION) armfield

IFD6INTERFACE CONSOLE TEMPERATURE CONTROL 1

2

3

4

5

6

7

8

out 1

°C

lae

MTW 11

0

o

-

I MAINS

1 o

o

I

SOCKET 1 POWER

CONDUCTIVIT Y mS

I

240V 2A~

WARNING SOCKET 2 POWER 240V~

DATA O/P

240V 2A~

HEAT

SOL.

CHILL

Ch2 Ch3 Ch4 Ch1

armfield CEX CHEMICAL REACTOR SERVICE UNIT

22

-

The IFD is powered from the mains outlet on the rear of the CEX. Connect channels as shown

CEX CHEMICAL REACTORS SERVICE UNIT

6.2

1

CET/CEX installation guide

MOUNTING THE FEED VESSEL ASSEMBLY

Fit the reagent vessel assembly to the CEX using the 4 locating studs and black hand nuts

2

Locating studs and fasteners

Connect the tubing on the left hand side of each of the two feed pumps to the standpipe located in each of the reagent vessels. (Left feed pump to front vessel, right feed pump to rear vessel)

MOUNTING THE HOT WATER CIRCULATOR (HWC) Rear view of CEX showing positioning of HWC Hoses on the HWC should be orientated as shown in the diagram

OUTPUT A.C. ~ 1A MAX

R.C.C.B

INPUT A.C. ~

O/P

PUMP

HEAT

MAINS INPUT 240V/1PH/50HZ~ CIRCULATOR

STIRRER D.C. O/P

The lead from the HWC plugs into the socket indicated. Carefully line up the pins in the plug with the socket. Once connected rotate the locking collar on the plug until it clicks into position

23

CEX CHEMICAL REACTORS SERVICE UNIT

3 -

-

MOUNTING THE CET MKII ONTO THE CEX

Fit the CET MkII assembly to the CEX using the 4 locating studs and black thumbnuts. Position the reactor so that the non-return valve is on the left hand side of the reactor towards the rear. Connect the remaining two pipes from the feed pumps to the connectors on the lid of the reactor as shown. Connect the conductivity probe and temperature sensor plugs to the sockets on the left hand edge of the control console. Fit the conductivity armfield sensor into the housing on the top of the reactor as shown. The temperature sensor fits into a gland on the reactor lid. In both cases the gland nut should be loosened to fit the probes and then tightened to secure them. Probes should be inserted fully so that they are submerged and flow holes in the conductivity probe glass should be positioned so that liquid flows through. TEMP

COND

CEB (OPTION)

TEMPERATURE PROBE AT REAR

-

TEMPERATURE CONTROL

out 1

°C

0

lae

MTW 11

1

CONDUCTIVITY mS

HEAT

DATA O/P

SOL.

CHILL

FRONT VESSEL

REAR VESSEL

CEX

CHEMICAL REACTOR SERVICE UNIT

4

CONNECTION TO ELECTRICITY SUPPLY Brown - Live (hot) Blue - Neutral (hot) Green/yellow - Earth (ground)

Check that the voltage specified on the equipment matches the supply voltage. NOTE: this unit MUST be earthed.

Ensure that circuit breakers and RCCD are ON (up) TEMPERATURE CONTROL

out 1

°C 0

-

lae

MTW 11 1

CONDUCTIVITY mS

HEAT

DATA O/P

SOL.

CHILL

OUTPUT A.C. ~ 1A MAX

armfield

R.C.C.B

Ensure Mains Switch is OFF

INPUT A.C. ~

O/P

PUMP HEAT

MAINS INPUT 240V/1PH/50HZ~ CIRCULATOR

24

STIRRER D.C. O/P

CEX CHEMICAL REACTORS SERVICE UNIT

5

PRIMING THE HOT WATER CIRCULATOR Connect suction pipe of the HWC to a cold water supply (preferably deionised). Switch on the mains switch on the front of the CEX. Adjust the temperature controller set-point to a temperature below ambient (see Operation instructions overleaf). Then switch on the pump switch at the side of the temperature controller.

-

-

Priming vessel

-

Suction pipe

-

6

CONNECTING THE HWC TO CET MKII -

Connect inlet pipe (1) to here -

2 -

-

Connect suction pipe of the HWC (1) to the overflow pipe mounted high on the side of the reactor Connect the supply pipe of the HWC (2) to the non-return valve mounted low down on the left rear side of the reactor. Fill the reactor with water, preferably deionised, using the fill plug on the top plate of the reactor. Refit the plug. Turn on the mains switch and then the pump switch and refill the HWC expansion tank as required.

1

Connect outlet pipe (2) to here

7

CONNECTING TO THE DATA LOGGER (OPTION) armfield

IFD6INTERFACE CONSOLE TEMPERATURE CONTROL 1

2

5

6

3

4

7

8

out 1

°C

lae

MTW 11

0

o

I MAINS

1 o

o

I

I

SOCKET 1 POWER

240V 2A~

WARNING SOCKET 2 POWER 240V~

CONDUCTIVIT Y mS

DATA O/P

240V 2A~

HEAT

SOL.

CHILL

Ch2 Ch3 Ch4 Ch1

armfield CEX CHEMICAL REACTOR SERVICE UNIT

25

-

The IFD is powered from the mains outlet on the rear of the CEX. Connect channels as shown. Stirrer channal unused with this reactor configuraton

CEX CHEMICAL REACTORS SERVICE UNIT

6.3

CEB/CEX installation guide

1

MOUNTING THE CEB ONTO THE CEX

TEMP

COND

CEB (OPTION) TEMPERATURE PROBE AT REAR

TEMPERATURE CONTROL

out 1

°C 0

lae

MTW 11 1

CONDUCTIVITY mS

HEAT

DATA O/P

SOL.

CHILL

FRONT VESSEL

REAR VESSEL

armfield

The reactor vessel is set on a baseplate which is itself located on four studs on the service unit and secured by thumbnuts. The hot water circulator and feed tanks provided with CEX are not required with the batch reactor configuration.

CEX CHEMICAL REACTOR SERVICE UNIT

-

-

The CEB is supplied with its own temperature sensor which fits in the socket on the side of console dedicated to this purpose. The sensor will not fit any other socket. Plug in the sensor then insert the sensor into the vessel through the appropriate gland on the reactor lid. The standard conductivity sensor provided with CEX is used with CEB. Plug this in to the appropriate socket on the side of the control console then insert the sensor through the remaining gland into the reactor. Ensure that both sensors are inserted fully into the vessel without fouling the wall or other components. Both sensors are secured in the correct position by tightening the gland nut.

2

CONNECTING TO THE ELECTRICITY SUPPLY

Check that the voltage specified on the equipment matches the supply voltage. NOTE: this unit MUST be earthed.

Brown - Live (hot) Blue - Neutral (hot) Green/yellow - Earth (ground) Ensure that circuit breakers and RCCD are ON (up)

TEMPERATURE CONTROL

out 1

°C 0

-

lae

MTW 11 1

CONDUCTIVITY mS

HEAT

DATA O/P

SOL.

CHILL

OUTPUT A.C. ~ 1A MAX

armfield

R.C.C.B

Ensure Mains Switch is OFF

INPUT A.C. ~

O/P

PUMP HEAT

MAINS INPUT 240V/1PH/50HZ~ CIRCULATOR

26

STIRRER D.C. O/P

CEX CHEMICAL REACTORS SERVICE UNIT

3

CONNECTING THE CEB TO THE CHILLER

The chiller unit is used when operating temperatures at or below ambient are required. The feed and return hoses for the chiller are connected to the heating coil within the reactor. Connections are made through the reactor lid. The plug for the chiller solenoid valve connects to the socket on the front of the control console (see ‘OPERATING THE CONSOLE’ page 12). Switch the switch on the control console to ‘CHILL’ Note: when controlling the reactor temperature (Isothermal operation) it is essential that the temperature sensor supplied with the is used, not the STS4 temperature sensor supplied with CEB

27

CEX CHEMICAL REACTORS SERVICE UNIT

4

CONFIGURING THE TEMP CONTROLLER FOR OPERATION WITH CHILLER

2

TEMPERATURE CONTROL

°C

out 1

0

1

lae

MTW 11 1

CONDUCTIVITY mS

DATA O/P

3

To enter configuration mode, sequentially press keys (3), (1) and (2) and keep them pressed for 3 seconds. Parameters are selected using key (2) and the parameter value by pressing key (1). Changes are made by pressing keys (2) or (3) and the new value stored by pressing key (1). Parameter values required for chiller operation are: Param Value Param Value Param Value Param Value 1Lo 0.0 1it 90 1PF 00 2ct 05 1hi 50.0 1dt 60 2Lo -19.9 2PF 00 1hy 0.0 1ar 35 2hi 99.9 dPS 01 1Pb 3.5 1ct 04 2hy 0.0 -

5

CONNECTING TO THE DATA LOGGER (OPTION)

armfield

IFD6INTERFACE CONSOLE TEMPERATURE CONTROL 1

2

5

6

3

4

7

8

out 1

°C

lae

MTW 11

0

o

I MAINS

1 o

o

I

I

SOCKET 1 POWER

240V 2A~

WARNING SOCKET 2 POWER 240V~

CONDUCTIVIT Y mS

DATA O/P

240V 2A~

HEAT

SOL.

CHILL

armfield CEX CHEMICAL REACTOR SERVICE UNIT

-

The IFD is powered from the mains outlet on the rear of the CEX. With CEB the two feed pump channels need not be connected. Connect the stirrer to channel 4, conductivity to channel 1 and the CEB temperature sensor to channel 5 (Adiabatic operation using the CEB’s STS4 temperature sensor). Temperature logging is not possible nor necessary when operating the reactor isothermally.

28

CEX CHEMICAL REACTORS SERVICE UNIT

Electrical diagram of the hot water circulator

29

CEX CHEMICAL REACTORS SERVICE UNIT

30