Reverse osmosis recycling method and device for hydrochloric acid well washing waste liquid of uranium mine

A technology of hydrochloric pickling and reverse osmosis, applied in mining wastewater treatment, chemical instruments and methods, osmosis/dialysis water/sewage treatment, etc., can solve the problem of no mature products and achieve the effect of reducing turbidity

Pending Publication Date: 2022-07-01
XINJIANG TIANSHAN URANIUM IND CO LTD CNNC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] However, how to realize the desalination process, there is no mature product on the market

Method used

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  • Reverse osmosis recycling method and device for hydrochloric acid well washing waste liquid of uranium mine

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Embodiment Construction

[0056] A uranium mine hydrochloric acid well washing waste liquid reverse osmosis recycling method, comprising the following steps:

[0057] Step 1: pH Adjustment

[0058] The pH value of the waste liquid needs to be controlled within the range of 6.5-8.

[0059] The specific operation steps are as follows: Use 15m 3 After the tank is filled with clean water, 400Kg of caustic soda (NaOH) is added; after 1 hour of uninterrupted stirring, its pH value can reach above 12. Use a pressure pump to pump the well-stirred flake alkali solution into the well washing waste liquid pool (1200m 3 ). In order to make the acid-base neutralization reaction between the well washing waste liquid and the flake alkali solution fully, the air compressor is used to blow the well washing waste liquid pool.

[0060] The air blowing time is 24 hours. After 24 hours, the pH value of the waste liquid is detected. If the pH value reaches the preset value, the air blowing is stopped; if the pH value is...

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Abstract

The invention belongs to a recycling method and device, and particularly relates to a reverse osmosis recycling method and device for hydrochloric acid well washing waste liquid of a uranium mine. The method comprises the following steps: step 1, adjusting pH; the pH value of the waste liquid needs to be controlled within the range of 6.5-8; step 2, coagulating sedimentation; carrying out coagulating sedimentation on the waste liquid by using a flocculating agent; step 3, multi-medium filtration; filtering with quartz sand, activated carbon and ion exchange resin; step 4, security filtration; the waste liquid is filtered through the filter element; step 5, reverse osmosis; and performing reverse osmosis on the waste liquid by using a reverse osmosis membrane. The method has the remarkable effects that U, Ca < 2 + >, Mg < 2 + >, SO4 < 2->, Cl <-> and Fe are removed in the reverse osmosis stage, the conductivity is obvious, the concentration of removed chlorine radicals is basically controlled below 0.37 g / L, and meanwhile, the turbidity is reduced.

Description

technical field [0001] The invention belongs to a recycling method and a device, and in particular relates to a reverse osmosis recycling method and device for uranium mine hydrochloric acid well washing waste liquid. Background technique [0002] Uranium ore is an indispensable mineral resource in the nuclear industry. The mining of uranium ore directly affects the operation of nuclear power plants. In the prior art, the mining of uranium ore mostly adopts the in-situ leaching method. Since the in-situ leaching method uses an acid solution as the in-situ leaching solution, it will affect the environment. Therefore, it is necessary to perform reverse osmosis treatment on the mine after mining. [0003] On the one hand, for CO 2 +O 2 In the process of neutral in-situ leaching of uranium, the amount of pumping and liquid injection is significantly reduced, and the hydrochloric acid chemical well flushing method is used to remove plugging and increase permeability and achieve...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F9/10C02F103/10C02F1/44C02F101/12
CPCC02F9/00C02F2103/10C02F1/66C02F1/56C02F1/001C02F1/42C02F2301/08C02F1/441C02F2303/14C02F2303/16C02F1/04C02F2101/12
Inventor 李勇马硕如阿不都穆志军
Owner XINJIANG TIANSHAN URANIUM IND CO LTD CNNC
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