Heat pump evaporation heat recovery combination device and waste liquid high-efficiency concentration method

Abstract

The invention discloses a novel heat pump evaporation heat recovery combined device and an efficient effluent concentration method.A suction pump is utilized for sucking effluent into an evaporation tank and spraying the effluent towards filler, hot and dry air exhausted by a heat pump and the sprayed effluent carry out heat exchange, water in the effluent is evaporated, and a concentrated solution obtained in the evaporation tank is circulated through the suction pump and enters the evaporation tank to be evaporated continuously; hot air obtained after heat exchange is sent back to the heat pump from the top of the evaporation tank, subjected to heat recovery through a heat recovery device in the heat pump and then passes through an evaporator to obtain condensate water and first cooling gas; before the effluent enters the evaporation tank, a heat exchanger is arranged to utilize the first cooling gas for preheating the effluent, the preheated effluent enters the evaporation tank and is sprayed towards the filler again, second cooling gas obtained after the first cooling gas releases heat is sent back to a condenser of the heat pump, and the hot and dry air is obtained under the action of the condenser.In this way, on the premise of not increasing energy consumption, evaporation and concentration efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technology in the field of waste liquid evaporation and concentration, in particular to a novel heat pump evaporation heat recovery combination device and a waste liquid high-efficiency concentration method. Background technique [0002] At present, the method of evaporating the waste liquid is generally adopted, that is, the waste liquid is continuously evaporated and the water is gradually concentrated; however, the evaporation efficiency in the prior art is limited and it is difficult to improve, which affects the waste liquid treatment efficiency. Evaporation efficiency requires an increase in thermal energy input, which leads to an increase in operating costs and does not conform to the current concept of energy conservation. [0003] In fact, in the existing evaporative concentration system, a lot of heat energy will be wasted. In the patent application of the present invention, a new technical solution has been studi...

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Problems solved by technology

[0002] At present, the method of evaporating the waste liquid is generally adopted, that is, the waste liquid is continuously evaporated and the water is gradually concentrated; however, the evaporation efficiency in the prior art is limited and it is difficult to improve, which affects the waste liquid treatment efficiency. Evaporation efficiency requires an increase in heat energy input, which leads to an increase in operating costs and does not conform to the current concept of energy conservation

[0003] In fact, in the existing evaporative concentration system, a lot of heat energy will be wasted. In the patent application of the present invention, a new technical solution has been studied, which uses the heat energy in the original evaporative concentration system to evaporate the waste liquid Preheating treatment before, to greatly improve the efficiency of evaporation and concentration without increasing energy consumption

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