Low-temperature evaporative crystallization device for high-salt organic wastewater

Abstract

The invention discloses a low-temperature evaporative crystallization device for high-salt organic wastewater and belongs to the technical field of low-temperature multi-effect evaporation, concentration and crystallization systems. The device comprises a first effecter, a second effecter, a third effecter, a fourth effecter, a fifth effecter and a cooling liquid tank; the bottom of one side of each of the first effecter, the second effecter, the third effecter and the fourth effecter is communicated with an exhaust pipe; an axial flow pump is installed in each exhaust pipe; a fixing plate isfixedly connected between the two sides of the inner wall of the cooling liquid box; and a purification box is fixedly connected to the top of the fixing plate. According to the low-temperature evaporative crystallization device for the high-salt organic wastewater, the purification box, first cation exchange resin and other devices are arranged; cooling water is purified before entering a systemfor circulation, so that calcium and magnesium ions in the cooling water are replaced, the cooling water is prevented from scaling in a condensation assembly in a recycling process, the heat conduction performance of the condensation assembly is guaranteed, and therefore normal use of the low-temperature multi-effect evaporation, concentration and crystallization system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of low-temperature multi-effect evaporation, concentration and crystallization systems, in particular to a low-temperature evaporation and crystallization device for high-salt organic wastewater. Background technique [0002] The low-temperature multi-effect evaporation concentration crystallization system is composed of multiple evaporators connected in series. The low-temperature (about 90°C) heating steam is introduced into the first effect to heat the feed liquid in it, so that the feed liquid is almost equal to the temperature of the steam. Amount evaporates. The generated steam is introduced into the second effect as heating steam, so that the feed liquid in the second effect evaporates at a lower temperature than the first effect, and this process is repeated until the last effect. [0003] The general low-temperature multi-effect evaporation concentration and crystallization system is equipped with ...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a low-temperature evaporation and crystallization device for high-salt organic wastewater, which solves the problem that cold water is prone to fouling in the condensation heat exchange components, which affects the heat transfer performance of the condensation heat exchange components, thereby affecting the entire system performance issues

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