Low-temperature multi-effect evaporative crystallization equipment

Abstract

The invention discloses low-temperature multi-effect evaporative crystallization equipment comprising a crystallization chamber, a single-effect evaporation chamber, a double-effect evaporation chamber, a triple-effect evaporation chamber, a single-effect condenser, a double-effect condenser, a triple-effect condenser and a vacuum pump; a drain outlet is formed in the lower end of the crystallization chamber; the upper end of the crystallization chamber is connected with the triple-effect evaporation chamber; the upper end of the triple-effect evaporation chamber is connected with the double-effect evaporation chamber, the upper end of the double-effect evaporation chamber is connected with the single-effect evaporation chamber, the single-effect evaporation chamber is connected with the single-effect condenser through a single-effect steam pipeline, the double-effect evaporation chamber is connected with the double-effect condenser through a double-effect steam pipeline, and the triple-effect evaporation chamber is connected with a triple-effect condenser through a triple-effect steam pipeline. The kinetic energy utilization rate is high, multiple evaporation can be achieved through one-time pressurization, and the kinetic energy utilization rate is increased; enterprise waste heat can be adopted as driving energy, and the energy cost can be zero. Not only is the problem of thermal pollution of enterprises solved, but also a driving heat source is provided for wastewater treatment, and finally zero discharge of wastewater is realized; wastewater is treated in the heating season, and meanwhile condensation heat can supply heat.

Description

technical field [0001] The invention relates to the technical field of high-salt wastewater solidification treatment, and the specific field is low-temperature multi-effect evaporation crystallization equipment. Background technique [0002] The existing evaporation and crystallization technologies mainly include mechanical compression (MVR) and multi-effect evaporation (MED). These two technologies have high energy consumption, low utilization efficiency, high operating costs, no economic benefits, and heavy burdens on enterprises. [0003] The kinetic energy utilization efficiency of multi-effect evaporation (MED) is low. One power transmission can only evaporate once, and the waste liquid needs to be pressurized during the second evaporation, which consumes a lot of electric energy. Multi-effect evaporation (MED) requires high-quality driving energy, and high-quality steam is required as driving energy. Contents of the invention [0004] The purpose of the present inve...

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Problems solved by technology

[0002] The existing evaporation and crystallization technologies mainly include mechanical compression (MVR) and multi-effect evaporation (MED). These two technologies have high energy consumption, low utilization efficiency, high operating costs, no economic benefits, and heavy burden on enterprises

[0003] Multi-effect evaporation (MED) has low kinetic energy utilization efficiency, and one power transmission can only evaporate once, and the waste liquid needs to be pressurized during the second evaporation, which consumes a lot of electric energy

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