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Process for evaporating high-concentration sewage

A sewage treatment system and high-concentration technology, applied in heating water/sewage treatment and other directions, can solve the problems of high operating costs, large investment, secondary pollution, etc., and achieve the effect of improving efficiency

Inactive Publication Date: 2011-06-08
SHAANXI TIANHONG SILICON IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an improved evaporative high-concentration sewage treatment system, which can overcome the disadvantages of large investment, high operating costs, unstable operation, and easy secondary pollution in the prior art.

Method used

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  • Process for evaporating high-concentration sewage
  • Process for evaporating high-concentration sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In Example 1, the sewage enters the first preheater 1 of the first evaporation unit to be heated, and enters the evaporator 3 after the temperature rises to the set value. The evaporator is in the form of horizontal tube falling film spraying, and the temperature outside the heat exchange tube is lower than the temperature inside the tube. After the sewage enters, it is sprayed on the outer surface of the horizontal heat exchange tube to exchange heat with the high-temperature water in the tube to generate steam; after the heat exchange, the temperature of the high-temperature water in the tube drops and becomes condensed water. One ejector group 5, the power provided by the second circulation pump 4 ejects the water flow at a high speed in the first ejector group 5, and the negative pressure generated at the throat sucks the steam in the evaporator 3, and the steam heats the condensed water to make it It becomes high-temperature water, and at the same time, it also bec...

Embodiment 2

[0020] In Example 2, two groups of evaporation units (JVC) are set, each unit is composed of a falling film evaporator, two circulating pumps, and a first-rate ejector group, and the two groups of evaporation units are connected by pipelines. The evaporator of the first evaporator unit adopts the form of horizontal tube falling film spraying, the heat exchange tubes of the evaporator are distributed horizontally, and the temperature outside the tube is lower than the temperature inside the tube. It has the characteristics of thin and uniform liquid film distribution, high heat transfer coefficient and simple structure, and is suitable for treating sewage with low solid content and good fluidity. After being preheated by the preheater, the sewage enters the horizontal tube falling film spray evaporator of the first evaporation unit, and is sprayed onto the outer surface of the horizontal heat exchange tube to exchange heat with the high-temperature water in the tube. Most of the...

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Abstract

The invention relates to an evaporating high concentration sewage treatment system, which is characterized in that: the sewage treatment system is formed by connecting a first evaporating unit and a second evaporating unit; two ends of the first evaporating unit and the second evaporating unit are connected with a water inlet tank and a water outlet tank respectively; each evaporating unit is provided with a falling film evaporator which is connected with two recycle pumps and a jet apparatus set; and the components are connected through pipelines. The two different evaporators are complemented and matched with each other, so that the treatment system not only has high heat transfer coefficient and high weight concentration, but also has the advantages of slow scale formation, long effective working life and the like; in addition, the system is simple in debugging and convenient to control.

Description

Technical field: [0001] The invention relates to the technical field of sewage treatment, in particular to a system for treating high-concentration sewage with evaporation technology. Background technique: [0002] In the current field of sewage treatment, sewage that is generally easier to treat, such as domestic sewage, food, light industry, and steel wastewater, has been relatively mature and reliable, and a relatively mature treatment method and process have been formed. [0003] However, for some industrial wastewater, such as high-concentration organic wastewater, oil field wastewater containing high salt and high oil content, and some special wastewater containing toxic and harmful substances, and COD content as high as hundreds of thousands, conventional wastewater treatment for this type of wastewater Water treatment processes have not helped. Even if you are lucky enough to find a treatment process, the high civil construction costs, equipment costs and operating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/04
Inventor 吴勇魏艳平黄永宽
Owner SHAANXI TIANHONG SILICON IND