A treatment method for high boron-containing geothermal 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: 2017-09-12
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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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 treatment method for high boron-containing geothermal tail water. The geothermal tail water first passes through a boron removal pre-filter and a boron removal filter, and then undergoes ceramic membrane ultrafiltration treatment and multi-stage reverse osmosis treatment. The pre-filter is filled with a filter medium sintered by activated carbon and diatomaceous earth, and the boron removal filter is filled with a boron removal adsorption resin containing polyvalent alcohol groups and amino groups; the boron removal filter uses a fiber filter to isolate the filter material, and the geothermal tail water is low In and out. When the boron content of the geothermal tail water is 100mg / L, the boron removal rate is ≥99.6%, and the effluent water quality can respectively meet the waste water discharge standard and the drinking water or farmland irrigation water quality standard. The treatment method of the invention has good boron removal effect, reduces equipment investment cost and operation cost, and improves the resource utilization level of geothermal tail water.
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...
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IPC IPC(8): C02F9/02
Inventor 刘世良陈磊高小荣邵衍福邵翀
Owner CHINA PETROCHEMICAL CORP