Sewage treatment plant based on mechanical recompression technique

Abstract

The invention relates to a sewage treatment plant based on mechanical recompression technique, which comprises a separator, an evaporation heat exchanger, a circulating pump, a feed pump, a vacuum pump, a compressor and a condensate pump. The sewage treatment plant is also provided with a control system, wherein the control system comprises a PLC (programmable logic controller) control station; the PLC control station is connected with a touch screen and an I / O expansion module through control lines; and the I / O expansion module is respectively connected with a steam regulating valve, the circulating pump, the compressor, the condensate pump, a feed regulating valve of the feed pump and a vacuum regulating valve of the vacuum pump through signal lines. The sewage treatment plant has the advantages of reasonable structural design and high operability, and can effectively implement sewage treatment. The sewage treatment plant can automatically regulate the motor frequency and feed rate according to the evaporation capacity, thereby implementing unmanned control state in deed and automatic control, and achieving the goals of energy saving and emission reduction by dynamic equilibrium, frequency autoregulation and other techniques.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to a sewage treatment device based on mechanical recompression technology. Background technique [0002] At present, the mechanical vapor recompression sewage treatment control system mainly deals with the industrial wastewater discharged from chemical plants. At present, the common processing devices and devices all need to consume a huge amount of energy, which is not conducive to energy saving. At present, it is necessary to develop high-efficiency, low-pollution evaporation treatment technology. [0003] Mechanical steam recompression is to recompress the single-effect evaporated steam through the compressor, increase the temperature and pressure, increase the heat enthalpy, and then enter the heat exchanger to condense to make full use of the latent heat of the steam. This kind of technology in China belongs to the emerging sunrise industry. Many factories and mines need MVR syst...

AI Technical Summary

Problems solved by technology

[0005] The main disadvantages are: 1. It is difficult for the operator to master the necessary experience and technology;

[0006] 2. It is easy to cause system failure due to operational errors;

[0007] 3. The motor speed cannot be automatically adjusted, resulting in energy waste;

[0008] 4. Unattended operation cannot be realized

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