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Method for treating high boron content terrestrial heat tail water

A treatment method and technology for geothermal tail water, applied in the field of high boron-containing geothermal tail water treatment, can solve the problems of insufficient recovery rate of waste water, easy damage of boron removal equipment, and discharge up to standard, so as to improve the quality of tail water treatment and production. The effect of aging, reducing investment cost, and prolonging service life

Active Publication Date: 2015-11-04
CHINA PETROCHEMICAL CORP +2
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Problems solved by technology

[0008] Aiming at the technical requirements of boron removal from geothermal tail water, in order to overcome the problems of low boron removal rate in the prior art, insufficient recovery rate and standard discharge of waste water after treatment, easy damage to boron removal equipment, etc., the present invention provides a geothermal tail water The treatment method improves boron removal efficiency, reduces equipment investment cost and operating cost, and improves the resource utilization level of geothermal tail water

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  • Method for treating high boron content terrestrial heat tail water
  • Method for treating high boron content terrestrial heat tail water

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Embodiment 1

[0034] A certain geothermal tail water comes from a geothermal well with a depth of more than 3000 meters. Its water quality components are complex: salinity is 4000-6000 mg / L, tail water temperature is 55-60 °C, boron content is 20-130 mg / L, and total hardness is 200-260 mg / L. L. Soluble solid 4000~5000mg / L, soluble silicon dioxide 40~50mg / L, sodium silicate 30~60mg / L, fluorine 2~2.5mg / L.

[0035] The geothermal tail water first passes through the preprocessor (1#, 2#, 3#), and the filter medium filled by the preprocessor is ZD-01 from Xuzhou Zhengdi Energy Auxiliary Co., Ltd. (ZD-01 is made of diatomaceous earth, activated carbon and other materials through high temperature, high pressure, and catalyzed a series of reactions to generate inorganic filter materials). The operating conditions of the preprocessor are: the amount of water inflow is 20-25m 3 / h, the amount of water produced is 20~25m 3 / h, the product water quality is clear and transparent visually, the working ...

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Abstract

The invention provides a method for treating high boron content terrestrial heat tail water. The terrestrial heat tail water first passes through a boron removal prefilter and a boron removal filter and then undergoes ceramic membrane ultra-filtration treatment and multistage reverse osmosis treatment. The prefilter is filled with a filtering medium formed by sintering activated carbon and diatomaceous earth, and the boron removal filter is filled with boron removal absorbent resin containing multivalent alcoholic groups and amino groups. The boron removal filter isolates a filter material by using a fiber filter screen, and the terrestrial heat tail water enters the prefilter and the filter low and comes out high. When the boron content of the terrestrial heat tail water is 100 mg / L, the boron removal rate is not lower than 99.6%, and the water quality of discharged water can respectively reach the waste water discharge standard and drinking water or farm irrigation water quality standard. The method for treating the high boron content terrestrial heat tail water is good in boron removal effect, reduces device investment cost and running cost and improves utilization level of terrestrial heat tail water resources.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment and recycling, in particular to a treatment method for high boron-containing geothermal tail water. Background technique [0002] my country has abundant reserves of geothermal resources, which are mainly developed and utilized in the north. They are used for heating urban residents in cold seasons, which not only saves a lot of coal, but also reduces carbon dioxide and sulfur dioxide emissions. [0003] In order to prevent excessive exploitation of geothermal resources, geothermal development requires "one well and one irrigation" to protect deep water sources. However, the drilling cost of recharge wells is high and the service life is short, which restricts the rapid development of geothermal development. Taking the Xianyang area as an example, the cost of drilling a recharge well is more than 5 million yuan (the depth of the well is 3300m×1550 yuan / m=5.115 million yuan). When th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02
Inventor 刘世良陈磊高小荣邵衍福邵翀
Owner CHINA PETROCHEMICAL CORP
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