CN202661854U

CN202661854U - Distributed control system (DCS) of low-bromine epoxy resin reaction kettle

Info

Publication number: CN202661854U
Application number: CN2012202519052U
Authority: CN
Inventors: 李秀莲
Original assignee: NEW POLY CHEMICAL (GUANGZHOU) CO Ltd
Current assignee: NEW POLY CHEMICAL (GUANGZHOU) CO Ltd
Priority date: 2012-05-30
Filing date: 2012-05-30
Publication date: 2013-01-09
Anticipated expiration: 2022-05-30

Abstract

The utility model belongs to the technical filed of chemical equipment, and particularly discloses a distributed control system (DCS) of a low-bromine epoxy resin reaction kettle. The DCS comprises a storage tank, a reaction kettle, a weight detection device and a programmable logic controller (PLC) control system, wherein the PLC control system comprises a raw material proportion control loop, a temperature control loop and a pressure and liquid level control loop. By means of the DCS, a plurality of valves are used to control pressure, liquid level and temperature in the process of reaction and feed of materials, and therefore operation of low-bromine epoxy resin reaction can be carried out in a standardization state. In addition, the PLC control system can be connected with a computer display screen, consequently relative parameters in the process of reaction can be seen clearly, and monitoring and operation control are further facilitated. Thus, the DCS of the low-bromine epoxy resin reaction kettle has the advantages of enhancing control performance in the reaction process and further improving production efficiency, accuracy of reaction and stability of good performance of products.

Description

The DCS Distributed Control System (DCS) of low bromine epoxy resin reactor

Technical field

The utility model belongs to technical field of chemical, is specifically related to a kind of DCS Distributed Control System (DCS) of low bromine epoxy resin reactor.

Background technology

Epoxy resin is the organic high molecular compound that contains two or more epoxide groups in the general reference molecule, and except indivedual, their relative molecular mass is not high.The molecular structure of epoxy resin is to contain active epoxide group to be its feature in strand, and epoxide group can be positioned at the end, centre of strand or structure circlewise.Owing to containing active epoxide group in the molecular structure, make them can form with polytype hardening agent generation cross-linking reaction insoluble, the not molten cancellated superpolymer of three-dimensional that has.Epoxy resin after the curing has good physics, chemical property, it has excellent bonding strength to the surface of metal and nonmetallic materials, dielectric properties are good, the set shrinkage factor is little, the product size good stability, and hardness is high, pliability is better, to alkali and most of solvent-stable, thereby be widely used in national defence, each department of national economy, make the purposes such as cast, dipping, lamination material, bonding agent, coating.

In the existing low bromine epoxy resin production run, need the workman constantly to pay close attention to the ruuning situation of reactor pressure, liquid level, weight, temperature and relevant device, thereby so that the production run controllability is bad, and then cause that production efficiency is not high, product quality is unstable.

The utility model content

In order to address the above problem, the utility model provides a kind of DCS Distributed Control System (DCS) of low bromine epoxy resin reactor, with monitoring and the operation of timely enforcement to reactor.

To achieve these goals, the technical solution adopted in the utility model is:

A kind of DCS Distributed Control System (DCS) of low bromine epoxy resin reactor, this system comprises storage tank, reactor, Weight detecting device and PLC control system, and described PLC control system comprises raw material proportioning control loop, temperature control loop and pressure and liquid level control loop; Wherein, described storage tank is connected pipeline with reactor and connects, and reactor is provided with heat-exchanging chamber outward, and heat-exchanging chamber connects respectively steam pipe and cooling water pipe, and the discharging opening of reactor is communicated with discharge nozzle; Wherein, described raw material proportioning control loop is by weight sensor, terminal box, the first Programmable Logic Controller, the first solenoid valve and the first discharge pump form, the side that weight sensor is installed in reactor becomes 120 ° of distributions, the output terminal of weight sensor is connected by the input end of terminal box with the first Programmable Logic Controller, the first Controlled by Programmable Controller the first solenoid valve and the first discharge pump, the first solenoid valve and the first discharge pump are installed on the pipeline that connects between storage tank and the reactor; Wherein, described temperature control loop is by temperature sensor, terminal box, the second Programmable Logic Controller, the first variable valve, the second variable valve and stop valve form, temperature sensor places in the reactor, and the output terminal of temperature sensor is connected by the input end of terminal box with the second Programmable Logic Controller, the second Controlled by Programmable Controller the first variable valve, the second variable valve and stop valve, the first variable valve is installed on the steam pipe, and the second variable valve and stop valve are installed on the cooling water pipe; Wherein, described pressure and liquid level control loop are comprised of filtrator, Weight detecting device, the 3rd Programmable Logic Controller, the 3rd variable valve and the second discharge pump, the 3rd variable valve and the second discharge pump are installed on the discharge nozzle, filtrator is installed on the discharge nozzle between the second discharge pump and the 3rd variable valve, the output terminal of Weight detecting device is connected by the input end of terminal box with the 3rd Programmable Logic Controller, the 3rd Controlled by Programmable Controller the 3rd variable valve and the second discharge pump.

The utility model adopts the DCS Distributed Control System (DCS), by the control of a plurality of valves to the pressure in the course of reaction, liquid level, temperature, and the input of material, the operation of low bromine epoxy resin reaction can be carried out under standardization; And it is very clear to the course of reaction correlation parameter that the utility model PLC control system can connect computer display screen, further facilitates monitoring and operation control.

Therefore, the utility model has strengthened the handling of course of reaction, and then has improved production efficiency, the accuracy of reaction and the stability of product superperformance.

Description of drawings

The picture that this description of drawings provides is used for auxiliary to further understanding of the present utility model, consists of the application's a part, does not consist of to improper restriction of the present utility model, in the accompanying drawings:

Fig. 1 is the utility model automatic control system structural representation;

Fig. 2 is the utility model raw material proportioning control loop circuit diagram;

Fig. 3 is the utility model temperature control loop circuit diagram;

Fig. 4 is the utility model pressure and liquid level control loop circuit diagram.

Embodiment

Describe the utility model in detail below in conjunction with accompanying drawing and specific implementation method, be used for explaining the utility model in schematic enforcement of the present utility model and explanation, but not as to restriction of the present utility model.

Embodiment 1:

Shown in Fig. 1-4, the utility model discloses a kind of DCS Distributed Control System (DCS) of low bromine epoxy resin reactor, comprise storage tank 101, reactor 102, Weight detecting device 104 and PLC control system 109.Wherein, storage tank 101 is connected with reactor by the pipeline connection, is provided with heat-exchanging chamber 103 outside the reactor 102, and heat-exchanging chamber 103 connects respectively steam pipe 105 and cooling water pipe 106, and the discharging opening of reactor 102 is communicated with discharge nozzle 107.Wherein, PLC control system 109 is made of raw material proportioning control loop, temperature control loop and pressure and liquid level control loop.

As shown in Figure 2, raw material proportioning control loop is by weight sensor 110, and terminal box 108, the first Programmable Logic Controller I111, the first solenoid valve 112 and the first discharge pump 113 form.The side that weight sensor 110 is installed in reactor 102 becomes 120 ° of distributions, the output terminal of weight sensor 110 is by the wiring end points 46 on the terminal box 108,47 are connected with the input end of being connected with the first safety barrier 114, the output terminal of the first safety barrier 114 is connected with the input end of the WIC-0302B AI of the first module terminals 115, the output terminal of the WIC-0302B AI of the first module terminals 115 is connected with the input end of the first Programmable Logic Controller 111, the output terminal of the first Programmable Logic Controller 111 is connected with the input end of the WV-0302BAO of the first module terminals 115, the output terminal of the WV-0302B AO of the first module terminals 115 and the wiring end points 3 on the terminal box 108,4 with are connected connection, thereby the first control solenoid valve 112 and the first discharge pump 113, the first solenoid valves 112 and the first discharge pump 113 are installed on the pipeline that connects between storage tank 101 and the reactor 102;

As shown in Figure 3, temperature control loop is by temperature sensor 220, terminal box 108, the second Programmable Logic Controller 221, the first variable valve 222, the second variable valve 223 and stop valve 224 form, temperature sensor 220 places in the reactor 102, the output terminal of temperature sensor 220 is by the wiring end points 34 on the terminal box 108,35 are connected with the input end of being connected with the second safety barrier 225, the output terminal of the second safety barrier 225 is connected with the input end of the WIQS-0302AI of the second module terminals 226, the output terminal of the WIQS-0302AI of the second module terminals 226 is connected with the input end of the second Programmable Logic Controller 221, the output terminal of the second Programmable Logic Controller 221 respectively with the XV0302DVC DO of the second module terminals 226, XV0302DVO DO is connected input end and is connected with XV0302DZO DO, the output terminal of the XV0302DVC DO of the second module terminals 226 and the wiring end points 13 on the terminal box 108,14 with are connected connection, wiring end points 16 on the output terminal of XV0302DVO DO and the terminal box 108,17 with are connected connection, wiring end points 19 on the output terminal of XV0302DZO DO and the terminal box 108,20 with are connected connection, thereby the second Programmable Logic Controller 221 controls the first variable valve 222, the second variable valve 223 and stop valve 224, the first variable valve 222 is installed on the steam pipe 105, and the second variable valve 223 and stop valve 224 are installed on the cooling water pipe 106.

As shown in Figure 4, pressure and liquid level control loop are by filtrator 330, Weight detecting device 104, the 3rd Programmable Logic Controller 331, the 3rd variable valve 332 and the second discharge pump 333 form, the 3rd variable valve 332 and the 3rd discharge pump 333 are installed on the discharge nozzle, filtrator 330 is installed on the discharge nozzle 107 between the second discharge pump 333 and the 3rd variable valve 332, the output terminal of Weight detecting device 104 is by the wiring end points 31 on the terminal box 108,32 are connected with the input end of being connected with the 3rd safety barrier 334, the output terminal of the 3rd safety barrier 334 is connected with the input end of the TIC-0302AI of the 3rd module terminals 335, the output terminal of the TIC-0302AI of the 3rd module terminals 335 is connected with the input end of the 3rd Programmable Logic Controller 331, the output terminal of the 3rd Programmable Logic Controller 331 is connected with the input end of the TV-0302AO of the 3rd module terminals 335, wiring end points 73 on the output terminal of the TV-0302AO of the 3rd module terminals 335 and the terminal box 108,74 with are connected connection, thereby the 3rd Programmable Logic Controller 331 control the 3rd variable valve 332 and the second discharge pumps 333.

Principle of work of the present utility model is: raw material enters in the reactor from storage tank by the road, after the first Programmable Logic Controller sends instruction, weight sensor is measured weight, obtain data, be converted to 4～20mA standard signal and send indicator gauge to, indicator gauge becomes digital signal to send the first Programmable Logic Controller to by communication Protocol Conversion after collecting signal, and the first Programmable Logic Controller sends instruction to the first solenoid valve and the first discharge pump after calculating, thereby reaches the accurate control of raw material proportioning.After the second Programmable Logic Controller sends instruction, the temperature sensor measurement temperature will be measured numerical value and be converted to electric signal to the second Programmable Logic Controller, and the second Programmable Logic Controller sends instruction through calculating to the first variable valve, the second variable valve II and stop valve.Temperature-rise period: the 2nd PLC Controlled by Programmable Controller stop valve cuts out, close simultaneously the second variable valve, when actual temperature during far below target temperature, the 2nd PLC Controlled by Programmable Controller the first variable valve 100% is opened, the 2nd PLC Programmable Logic Controller is according to the difference size of actual temperature and target temperature in temperature-rise period, the open amount of the first regulating and controlling valve, when actual temperature during more than or equal to target temperature, the 2nd PLC Controlled by Programmable Controller the first variable valve cuts out fully.Temperature-fall period: the 2nd PLC Controlled by Programmable Controller stop valve is opened, close simultaneously the first variable valve, when actual temperature during far above target temperature, the 2nd PLC Controlled by Programmable Controller the second variable valve 100% is opened, the 2nd PLC Programmable Logic Controller is according to the difference size of actual temperature and target temperature in temperature-fall period, control the open amount of the second variable valve, when actual temperature was less than or equal to target temperature, the 2nd PLC Controlled by Programmable Controller the second variable valve cut out fully.Product enters in the discharge nozzle through the outlet of reactor, after the 3rd Programmable Logic Controller sends instruction, Weight detecting device is measured weight, obtain data, be converted to 4～20mA standard signal and send indicator gauge to, indicator gauge becomes digital signal to send the 3rd Programmable Logic Controller to by communication Protocol Conversion after collecting signal, and the 3rd Programmable Logic Controller sends instruction to the 3rd variable valve and the second discharge pump after calculating, thereby reaches the accurate control of finished product metering.

The above technical scheme that the utility model embodiment is provided is described in detail, used specific case herein principle and the embodiment of the utility model embodiment are set forth, the explanation of above embodiment is only applicable to help to understand the principle of the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, all will change on embodiment and range of application, in sum, this description should not be construed as restriction of the present utility model.

Claims

1. the DCS Distributed Control System (DCS) of one kind low bromine epoxy resin reactor is characterized in that:

This system comprises reactor, storage tank, Weight detecting device and PLC control system, and described PLC control system comprises raw material proportioning control loop, temperature control loop and pressure and liquid level control loop;

Described storage tank is connected pipeline with reactor and connects, and reactor is provided with heat-exchanging chamber outward, and heat-exchanging chamber connects respectively steam pipe and cooling water pipe, and the discharging opening of reactor is communicated with discharge nozzle;

Described raw material proportioning control loop is comprised of weight sensor, terminal box, the first Programmable Logic Controller, the first solenoid valve and the first discharge pump, the side that weight sensor is installed in reactor becomes 120 ° of distributions, the output terminal of weight sensor is connected by the input end of terminal box with the first Programmable Logic Controller, the first Controlled by Programmable Controller the first solenoid valve and the first discharge pump, the first solenoid valve and the first discharge pump are installed on the pipeline that connects between storage tank and the reactor;

Described temperature control loop is by temperature sensor, terminal box, the second Programmable Logic Controller, the first variable valve, the second variable valve and stop valve form, temperature sensor places in the reactor, the output terminal of temperature sensor is connected by the input end of terminal box with the second Programmable Logic Controller, the second Controlled by Programmable Controller the first variable valve, the second variable valve and stop valve, the first variable valve is installed on the steam pipe, and the second variable valve and stop valve are installed on the cooling water pipe;

Described pressure and liquid level control loop are comprised of filtrator, Weight detecting device, the 3rd Programmable Logic Controller, the 3rd variable valve and the second discharge pump, the 3rd variable valve and the second discharge pump are installed on the discharge nozzle, filtrator is installed on the discharge nozzle between the second discharge pump and the 3rd variable valve, the output terminal of Weight detecting device is connected by the input end of terminal box with the 3rd Programmable Logic Controller, the 3rd Controlled by Programmable Controller the 3rd variable valve and the second discharge pump.