Temperature control method and device of vcm monomer heat exchanger
A temperature control method and temperature control device technology, applied in heat exchange equipment, lighting and heating equipment, etc., can solve problems such as increased labor costs and increased workload of staff, and achieve the effect of saving labor costs
Active Publication Date: 2020-02-18
SHENYANG CHEM IND CO LTD
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Problems solved by technology
[0006] In the control method of the prior art, every time the type of heat exchange liquid fed into the heat exchanger is changed, that is, chilled water or hot water is fed in, it is necessary to reset the control program of the PID controller to adjust the control direction, resulting in the work of the staff. Increase in volume, increase in labor costs
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specific Embodiment
[0089] Figure 6 A schematic configuration diagram of the control mode of the VCM single heat exchanger according to a specific embodiment of the present invention is shown. Combine below figure 1 and Figure 6 The selection of the control method is explained:
[0090] Among them, for Figure 6Part A adopts cascade control, and the temperature TE1142 of chilled water or hot water used for heat exchange plays a vital role in the final heat exchange effect, which can be regarded as a disturbance here. Therefore, the design uses TE1141 as the input of the main circuit, TE1142 as the input of the secondary circuit, and the regulating valve TV1142 is used to adjust the output. The purpose of this scheme is to correct the interference of the auxiliary loop through the regulator of the auxiliary loop before it affects the parameters of the main loop, so as to overcome the influence of the interference on the main control parameters.
[0091] for Figure 6 The middle B part adop...
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The invention discloses a temperature control method and device of a VCM monomer heat exchanger. The temperature control method includes obtaining the temperature of the output end of the VCM monomer heat exchanger; calculating the opening degree of the upper water flow control valve according to the temperature of the output end; obtaining The working status of the first water supply valve and the second water supply valve; if the first water supply valve is open and the second water supply valve is closed, the opening of the water supply flow control valve is corrected; if the first water supply valve is closed And when the second water supply valve is opened, the opening of the water supply flow control valve remains unchanged; the operation of the water supply flow control valve is controlled according to the opening of the water supply flow control valve. The invention calculates the opening degree of the water supply flow control valve according to the real-time temperature of the VCM monomer at the output end of the heat exchanger and the working state of the water supply system, avoiding the problem of manually modifying the control program when the heat exchanger switches working conditions, and saving manpower cost.
Description
technical field [0001] The invention relates to the technical field of heat exchanger temperature control, in particular to a temperature control method for a VCM single heat exchanger, a temperature control device for a VCM single heat exchanger, a temperature control device and a storage medium. Background technique [0002] Vinyl chloride (VCM), also known as vinyl chloride, is a monomer for synthesizing polyvinyl chloride (PVC), with a boiling point of -13.9°C and a gaseous state at normal temperature and pressure. Pure vinyl chloride gas is pressurized to 5 atmospheres In the above case, it can be cooled with industrial water to obtain liquid vinyl chloride slightly lighter than water. [0003] About 75% of PVC (polyvinyl chloride) paste resin is produced by micro-suspension polymerization. The polymerization process uses VCM monomer with a purity of 99.99% as raw material, and disperses VCM monomer under the action of mechanical stirring and dispersant Droplets are su...
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IPC IPC(8): F28F27/02
CPCF28F27/02
Inventor 魏革邱颖代永福
Owner SHENYANG CHEM IND CO LTD