An integrated evaporator automatic control system and control method

Abstract

The invention discloses an automatic control system of an integrated dehumidification evaporator. The system comprises an evaporator body control system, a double-effect cooling and drying heater control system, a waste gas purification and adsorption control system and a main monitoring system, the evaporator body control system comprises a raw material liquid circulation control module, a gas-liquid separation control module, a material liquid concentration control module and a feeding and discharging control module. The double-effect cooling and drying heater control system comprises a compressor control module, a secondary cooler control module and a secondary heater control module. The condensation heater and the evaporative cooler of the air conditioner heat pump unit are fully utilized, the equipment structure is simple, raw material liquid is prevented from making direct contact with the heat exchanger, the corrosivity of the raw material liquid has no influence on a system, and the investment operation cost is greatly reduced; unattended full-automatic operation can be achieved conveniently, online monitoring and remote operation data recording are achieved, the cost is low, and the quality of clear water separated from raw material liquid is better than that of clear water separated from a traditional evaporator.

Description

technical field [0001] The invention relates to the field of chemical raw material liquid treatment, in particular to an automatic control system and control method for an integrated evaporator. Background technique [0002] At present, more than 98% of the evaporators on the market (single-effect, double-effect, triple-effect, MVR, TVR, etc.) heat the raw material liquid through the heat exchanger. When the raw material liquid reaches the evaporation temperature, it starts to vaporize to achieve the purpose of evaporation and concentration. . Since most of the raw material liquids are extremely corrosive, all parts in contact with the raw material liquid and the concentrated liquid, including heat exchangers, pipes, evaporation reactors, etc., require very expensive alloy materials. [0003] The traditional evaporator gas-liquid separation gas is a traditional stainless steel tank container, which has a large amount of entrainment and poor separation effect, resulting in t...

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Problems solved by technology

[0003] The traditional evaporator gas-liquid separation gas is a traditional stainless steel tank container, which has a large amount of entrainment and poor separation effect, resulting in the quality of condensed water not meeting the standard. It needs to be returned to the filtration adsorption system and membrane treatment system for further treatment before it can be reused. Production line or standard discharge

Due to the phase change of the material and liquid in the evaporator on the surface of the alloy material, crystallization or scaling will adhere to the surface of the heat exchanger and the reactor, resulting in poor heat transfer effect, high energy consumption, and frequent shutdowns for chemical cleaning, resulting in chemical pollution and Risk of user operation and use, reducing equipment efficiency and service life

[0004] At present, if the evaporators on the market are semi-automatic or fully automatic, a large number of expensive online monitoring instruments need to be invested, which greatly increases equipment costs and later maintenance costs. Even so, it is difficult to achieve continuous fully automatic operation

In order to achieve relatively low operating costs, it is necessary to invest a large amount of auxiliary equipment (such as heat transfer oil boilers, steam boilers, vacuum systems, cooling water equipment, chemical cleaning equipment, etc.), these auxiliary equipment will also greatly increase the investment cost of the complete system and Late running costs

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