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Method and system for treating high-concentration wastewater by virtue of low-temperature evaporative crystallization

A high-concentration wastewater treatment method technology, applied in multi-stage water treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of easy scaling of equipment, low evaporation efficiency, high cost, etc. Scale reduction, cost reduction, and the effect of avoiding corrosion of equipment

Inactive Publication Date: 2015-05-27
北京特里高膜技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of low evaporation efficiency of current high-concentration wastewater treatment methods and equipment, easy scaling of equipment, serious corrosion, and high cost

Method used

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  • Method and system for treating high-concentration wastewater by virtue of low-temperature evaporative crystallization
  • Method and system for treating high-concentration wastewater by virtue of low-temperature evaporative crystallization
  • Method and system for treating high-concentration wastewater by virtue of low-temperature evaporative crystallization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the method for treating high-concentration wastewater by single-effect low-temperature evaporation and crystallization comprises the following steps:

[0033] (1) Evaporation cycle: The raw water in the raw water tank 1 enters the evaporation chamber 401 of the first effect evaporation module 4 after preheating, and then enters the top of the evaporation chamber 401 through the circulation pump 405; the water at the top of the evaporation chamber 401 flows along the evaporation chamber. The surface of the inclined plate 403 of 401 flows downward, and the wind blown by the fan at the air inlet 402 contacts the water layer on the surface of the inclined plate 403 to generate saturated humid air, which is discharged from the evaporation chamber 401 through the air outlet 404; The concentrated liquid that generates saturated humid air and flows into the bottom of the evaporation chamber 401 is lifted to the top of the evaporation chamber 401 by th...

Embodiment 2

[0038] Such as figure 2 As shown, the double-effect low-temperature evaporation and crystallization method for treating high-concentration wastewater has a treatment capacity of 100m 3 / d, including the following steps:

[0039] (1) Evaporation cycle: The raw water in the raw water tank 1 is preheated by the heater 2 and pumped into the evaporation chamber 401 of the first-effect evaporation module 4 through the raw water pump 3, and then lifted to the second-effect evaporation module 6 by the circulation pump 405 At the top of the evaporation chamber 601, the water flows down along the surface of the inclined plate 603 and flows into the evaporation chamber 601. At the same time, the fan at the air inlet 602 blows to the evaporation chamber 601. The water contacts with the wind to become saturated humid air, and the saturated humid air flows from the outlet to the evaporation chamber 601. The tuyere 604 is discharged into the second-effect condensing module 7; the concentra...

Embodiment 3

[0047] Such as Figure 4 , a three-effect low-temperature evaporation and crystallization method for treating high-concentration wastewater, with a treatment capacity of 150m 3 / d, including the following steps:

[0048] (1) Evaporation cycle: The raw water in the raw water tank 1 is preheated by the heater 2 and pumped into the evaporation chamber 401 of the first-effect evaporation module 4 through the raw water pump 3, and then lifted by the circulation pump 5 to the second-effect evaporation module 6. At the top of the evaporation chamber 601, water flows down along the surface of the inclined plate 603, and flows into the evaporation chamber 601 of the second effect evaporation module 6. At the same time, the air inlet 602 blows to the evaporation chamber 601, and the wind contacts with the water to become saturated humid air. Air is discharged into the second-effect condensing module 7 from the air outlet 604; the concentrated liquid that does not generate saturated hum...

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Abstract

The invention provides a method for treating high-concentration wastewater. The method comprises the following steps: preheating raw water in a raw water tank and then feeding the preheated raw water into an evaporation chamber, and feeding the raw material into the top of the evaporation chamber through a circulating pump so that the water flows downwards along the surface of an inclined plate in the evaporation chamber; blowing air at the air inlet to contact the air with the water layer on the surface of the inclined plate to generate saturated wet air, discharging the saturated wet air out of the evaporation chamber via an air outlet to feed into a condensation chamber for cooling in the condensation chamber; lifting the concentrated liquor flowing into the bottom of the evaporation chamber to the top of the evaporation chamber by an evaporation chamber circulating pump for cyclic evaporation; and when the concentrated liquor in the evaporation chamber is saturated and crystalized, discharging the crystals out of the evaporation chamber via a crystal discharge hole to enter into a crystal treatment system, and returning the liquor obtained after treatment back to the raw water tank, and recycling the precipitate. The method and the system for treating the high-concentration wastewater are used for solving the problems of low evaporation efficiency, easy equipment scaling, heavy corrosion and high cost of current high-concentration wastewater treatment.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a method and system for treating high-concentration wastewater by low-temperature evaporation and crystallization. Background technique [0002] With the increasing environmental protection requirements and the development of industrialization, more high-salt wastewater or high-salt and highly corrosive wastewater is produced. This kind of wastewater is difficult to treat with conventional treatment methods, and direct discharge will cause great pollution to the environment. At the same time, with the improvement of environmental protection standards and requirements, it is necessary to treat waste water with high salt content and achieve zero discharge goals in many places. [0003] The traditional zero-emission process is generally distillation evaporation technology, and the applied technical principle is falling film or rising film evaporation, that is, a thin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F1/04C02F2301/046C02F2301/08
Inventor 关向宇刘洋石艳艳张保成
Owner 北京特里高膜技术有限公司
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