A waste heat recovery evaporative crystallization device

Abstract

The invention discloses a waste heat recovery type evaporation and crystallization device, which is characterized in that it comprises an evaporation kettle and a waste heat recovery tower, a heat pipe is arranged in the waste heat recovery tower, the hot end of the heat pipe is arranged in the waste heat recovery tower, and the cold end of the heat pipe is arranged in the waste heat recovery tower. In the evaporator, a cyclone separator is installed on the top of the waste heat recovery tower, and the ash outlet of the cyclone separator is directly connected with the inner cavity of the waste heat recovery tower. An updraft is introduced into the waste heat recovery tower. Compared with the prior art, the present invention has the following advantages: due to the large heat flux of the heat conduction of the heat pipe, the instantaneous evaporation of the solution can be realized, thereby achieving the effect of continuous production, and breaking the dilemma of the traditional intermittent production of evaporation and crystallization operations; In addition, through such a design, the traditionally considered "waste heat" in the solid phase is successfully recycled and utilized efficiently, and multiple heat transfer methods coexist, resulting in excellent heat transfer effects, high energy utilization efficiency, energy saving and environmental protection.

Description

technical field [0001] The invention relates to the field of evaporation and crystallization devices, in particular to a waste heat recovery type evaporation and crystallization device. Background technique [0002] The usual method for drying powdery or fine granular materials is to use the gas-phase high-temperature heat medium to directly contact the material, blow the particles up through the high-speed flowing heat medium, and take the water away directly from the gas phase after vaporization and evaporation. The heat in the final gas phase is easy to reuse, but the heat left in the solid phase is often allowed to dissipate because it is difficult to recover. Existing devices rarely have waste heat recovery devices for solid materials. The following problems exist in the operation of recovering waste heat from solid materials: the solid material has poor fluidity and heat convection effect; direct contact heat exchange can overcome the defect of poor fluidity, but it w...

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Problems solved by technology

The following problems exist in the operation of recovering waste heat from solid materials: the solid material has poor fluidity and heat convection effect; direct contact heat exchange can overcome the defect of poor fluidity, but it will bring some waste gas and fly ash in the solid material into the heat exchanger. In the heat medium, it causes the difficulty of secondary separation and purification; in addition, there are many schemes that adopt intermittent operation, which has low production efficiency and limited output

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