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Efficient treatment system for boron-containing wastewater

A waste water treatment system, high-efficiency technology, applied in water/sewage treatment, heating water/sewage treatment, neutralized water/sewage treatment, etc., can solve problems such as inability to meet the high-concentration boron-containing waste water efficient treatment, to avoid concentrated waste water Effect

Pending Publication Date: 2020-10-13
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Based on the characteristics of the above treatment methods, each method has certain defects when used alone, and cannot meet the high-efficiency treatment of high-concentration boron-containing wastewater.

Method used

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  • Efficient treatment system for boron-containing wastewater
  • Efficient treatment system for boron-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a high-efficiency boron-containing wastewater treatment system includes a water quality adjustment mechanism, a bag filter 5, a reverse osmosis treatment mechanism and a post-treatment mechanism connected in sequence;

[0043] The water quality adjustment mechanism includes a pH adjustment mechanism and a complex treatment mechanism;

[0044] The pH adjustment mechanism includes a primary water tank 1 and a pH dosing device 2, and the waste water is transported to the primary water tank 1 through the waste water pipeline 9, and No. 1 regulating valve 10 and No. Water pump 11, No. 1 pressure detector 12 and No. 1 conductivity meter 13; the model of the pH dosing device 2 is AMS200;

[0045] The complexing treatment mechanism includes an automatic detection packing system 3 and a secondary water tank 4; the secondary water tank 4 communicates with the primary water tank 1 and the bag filter 5 respectively, and the primary water tank 1 and the s...

Embodiment 2

[0055] Based on Example 1, when the pH value of the initial wastewater is high (already in the range of 8.5-10.5), the water quality adjustment mechanism directly adopts the complexation treatment mechanism, and the pH adjustment mechanism is omitted.

Embodiment 3

[0057] Based on Example 1, when the wastewater contains high radioactivity, the curing mechanism uses an asphalt curing device, and the concentrated wastewater is directly solidified and sealed for treatment. The asphalt solidification device adopts the screw extrusion method, and the screw extruder is composed of two (or four) parallel long screws and sleeves whose threads mesh with each other. Wastewater and molten asphalt are fed from one end, dispersed into a thin film on the screw, as the screw rotates, the waste water and asphalt are mixed, steamed out of water and moved forward, and the mixture is extruded into the receiving barrel in the form of sticky strips. The asphalt solidified body has good performance. When the waste holding capacity and salt content are appropriate, the leaching rate is 1 / 100-1 / 1000 lower than that of the similar cement solidified body; due to the removal of water, the volume reduction ratio is greater than 1.

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Abstract

The invention discloses an efficient treatment system for boron-containing wastewater. The system comprises a water quality adjusting mechanism, a bag filter, a reverse osmosis treatment mechanism anda post-treatment mechanism which are connected in sequence, wherein the water quality adjusting mechanism comprises a pH value adjusting mechanism and / or a complexing treatment mechanism; the pH value adjusting mechanism comprises a first-stage water tank and a pH dosing device, and the wastewater is conveyed to the first-stage water tank through a wastewater pipeline; the complexing treatment mechanism comprises an automatic detection filler system and a secondary water tank, and the second-stage water tank separately communicates with the first-stage water tank and the bag type filter; thereverse osmosis treatment mechanism comprises at least one reverse osmosis membrane and a reverse osmosis loop; the post-treatment mechanism comprises an activated carbon adsorption mechanism and a curing mechanism which are connected in parallel. According to the invention, the generation of concentrated wastewater can be avoided on the basis of the efficient treatment of the boron-containing wastewater, the final boron removal efficiency of the water treatment system can achieve 99% or more, and as the boron content of the nuclear power station wastewater is 50 mg / L, the water quality of thewastewater can achieve drinking water standards after purification by the treatment system.

Description

technical field [0001] The invention belongs to the field of water treatment systems, and in particular relates to a high-efficiency boron-containing wastewater treatment system. Background technique [0002] During the operation of the pressurized water reactor nuclear power plant reactor, it is necessary to add an appropriate amount of boric acid to perform compensation control of the chemical reaction to reduce the reactivity. The nuclear power plant wastewater produced in this process needs to go through an appropriate wastewater treatment system to separate and concentrate boron and various radionuclides. If nuclear wastewater is not properly treated, boron will be lost to the natural environment, and long-term accumulation will cause the content of boron in the water environment to exceed the standard, which will adversely affect the ecological environment and human health. [0003] In the state of nuclear emergency, it is necessary to fully consider the boron-contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F9/00C02F2101/006C02F1/66C02F1/001C02F1/441C02F1/283C02F1/04C02F1/444
Inventor 王伟鹏马延巧
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND