Strong brine evaporating and crystallizing system

A technology of evaporative crystallization and concentrated brine, which is applied in the directions of water/sewage multi-stage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc. It can solve secondary steam blockage, blockage of heat exchanger tubes and Pipeline, can not run continuously and stably, etc., to reduce energy consumption and avoid blockage

Active Publication Date: 2014-08-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] If the concentrated brine contains calcium ions, magnesium ions, sulfate ions, carbonate ions, silicates, etc., they will be continuously concentrated to co-saturation during the evaporation crystallization process to produce crystal nuclei such as calcium sulfate, calcium carbonate, and silicate colloids. , the crystal nuclei and colloids adhere to the surface of the heat exchange tubes of the crystallization separator and crystallization heater to form a scale layer, which affects the heat transfer effect
[0009] In the process of evaporation and crystallization of concentrated brine, it is easy to produce secondary steam mist entrainment phenomenon, and the salt water drop

Method used

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  • Strong brine evaporating and crystallizing system

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Experimental program
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Effect test

Embodiment 1

[0048] The system of the present invention is used to process mixed concentrated brine with a TDS concentration of 100-300 g / L.

[0049] The high-concentration mixed brine enters the feed buffer tank 1, when the liquid level in the feed buffer tank 1 reaches 20%, the first agitator starts automatically, and stops automatically when the liquid level is lower than 20%. The concentrated brine in the feed buffer tank 1 is transported to the decalcification-magnesium reaction tank 3 through the first pump 2. When the liquid level of the reaction tank 3 is lower than 10%, the first pump 2 is automatically started to transport the concentrated brine to the reaction tank 3; When the liquid level in the reaction tank 3 reaches 75%, the first pump 2 stops automatically, when the liquid level in the reaction tank 3 reaches 20%, the fifth agitator automatically starts, and automatically stops when the liquid level is lower than 20%.

[0050] When the liquid level in the decalcification an...

Embodiment 2

[0062] The concentrated brine effluent obtained by the mechanical vapor recompression evaporation technology of the seed crystal method is treated by the system of the invention. Among them, Table 1 is the water quality table of the seed crystal method mechanical vapor recompression evaporation technology.

[0063] pH

Ca 2+

Mg 2+

Na +

K +

SO 4 2-

Cl -

F -

4～6

1200

3195

70000

601

1148

180942

26.5

NO 3 -

Br -

B

SiO 2

TDS

TSS

COD

Ammonia nitrogen

2.6

80

142

307

226016

46180

410

0.7

[0064] Table 1

[0065] The concentrated brine enters the feed buffer tank 1, when the liquid level reaches 20%, the first agitator starts automatically, and stops automatically when the liquid level is lower than 20%. The concentrated brine is transported to the decalcification and magnesium reaction tank 3 through the first pump 2. Whe...

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Abstract

The invention provides a strong brine evaporating and crystallizing system, which comprises a calcium-magnesium removing reaction tank, a filter press, a feeding tank, a crystallizing separator, a crystallizing heater, a compressor, a thickener, a centrifugal machine and a mother liquor tank, wherein the filter press is connected with the calcium-magnesium removing reaction tank, and the feeding tank is connected with the filter press; the crystallizing separator is connected with the feeding tank, a strong brine inlet and a strong brine outlet of the crystallizing heater are respectively connected with the crystallizing separator; an inlet and an outlet of the compressor are respectively connected with the crystallizing separator and the crystallizing heater; an inlet of the thickener is connected with the crystallizing separator, an outlet of the thickener is connected with the centrifugal machine, and a liquid outlet of the centrifugal machine is connected with the crystallizing separator through the mother liquor tank. The strong brine evaporating and crystallizing system can be used for processing mixed strong brine with TDS (total dissolved solids) concentration of 100-300g/L so as to realize continuous stable running and total recycling of the sewage, solves the problem of water resource shortage in some areas and reduces pollution to the environment.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and more particularly, to a concentrated brine evaporation and crystallization system. Background technique [0002] At present, the treatment of concentrated brine at home and abroad generally adopts the natural evaporation of evaporation ponds or the use of evaporation crystallization systems to crystallize solid salts into safe landfills. [0003] Evaporation pond natural evaporation is a large-area pond, which stores concentrated brine, and uses solar energy to evaporate water naturally, so that the salt remains at the bottom of the pond for regular cleaning. At the same time, the evaporation pond needs to adopt corresponding anti-seepage measures. [0004] The use of evaporation ponds is energy-saving and has low operating costs, but its equipment has large capacity, large floor space, high requirements for anti-leakage, low evaporation rate, high one-time investment, inabil...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/04
Inventor 孙文生林清武张宇宋顺利张锐锋王淑萍谢晓峰李向伟邵志国胡良艾衍林邓国锋薛文娟何清秀王振兴
Owner BC P INC CHINA NAT PETROLEUM CORP
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