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Gasified grey water aeration hardness removal device, treatment method and application

An aeration and gray water technology, applied in water/sewage treatment, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve the problems of large lye consumption, short service life of resin and membrane, and carbon dioxide dosage Large and other problems, to achieve the effect of uniform particle size and good mixing effect

Active Publication Date: 2021-03-19
BEIJING JINGRUN NEW TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN209383527U discloses a kind of space furnace gasification ash water dehardening device, including settling tank, pretreatment device, adsorption device, analysis device, analysis liquid film recovery device, slag removal pond; gray water storage tank is connected with settling tank, pretreatment The water outlet of the pretreatment device is connected to the adsorption device, the sewage outlet of the pretreatment device is connected to the slag removal tank, and the water outlet of the adsorption device is connected back to the gray water storage tank. The analysis liquid circulation pipeline, the analysis device and the analysis liquid film recovery device form a circulation system; the device performs resin adsorption on the gasified gray water, replaces calcium and magnesium ions, and then uses the desorption device to regenerate the resin and reuse it, but there are Disadvantages such as high equipment operation intensity, short service life of resin and membrane, and more difficult treatment of recycled waste liquid may easily cause new wastewater pollution problems
The reaction pH of the precipitation area of ​​the device is relatively high, and the consumption of lye is large when the pH is adjusted. After the carbon dioxide aeration, the pH value is between 7.0-8.0. And the dosage of carbon dioxide is large, there is still a risk of fouling in the effluent

Method used

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  • Gasified grey water aeration hardness removal device, treatment method and application
  • Gasified grey water aeration hardness removal device, treatment method and application

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Experimental program
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Effect test

Embodiment 1

[0078] This embodiment provides a device for aeration and dehardening of gasified gray water, and the structural diagram of the device is as follows: figure 1 As shown, it includes a carbon dioxide aeration unit 1 , a flocculation settling unit and a sedimentation separation unit 4 connected in sequence, and the carbon dioxide aeration unit 1 includes a cyclone aeration component.

[0079] The structural schematic diagram of the cyclone aeration assembly is as follows: figure 2 As shown, it includes an aeration chamber 11, an air inlet pipe 12, an air distribution pipe 13 and a cutter 14. The air inlet pipe 12 is connected to the air distribution pipe 13, and the air distribution pipe 13 is located at the bottom of the cyclone aeration assembly. The cutter 14 is arranged on the inner wall of the aeration chamber 11.

[0080] The air distribution pipe 13 includes a horizontal air distribution pipe and a longitudinal air distribution pipe.

[0081] There are three cyclone aer...

Embodiment 2

[0093] This embodiment provides an aeration and dehardening device for gasified gray water. The device includes a carbon dioxide aeration unit 1, a flocculation settling unit and a sedimentation separation unit 4 connected in sequence. The carbon dioxide aeration unit 1 includes a cyclone aeration unit. gas components.

[0094] The cyclone aeration assembly includes an aeration chamber 11, an air inlet pipe 12, an air distribution pipe 13 and a cutter 14, the air inlet pipe 12 is connected to the air distribution pipe 13, and the air distribution pipe 13 is located at the bottom of the cyclone aeration assembly, The cutter 14 is arranged on the inner wall of the aeration chamber 11 .

[0095] The air distribution pipe 13 includes a horizontal air distribution pipe and a longitudinal air distribution pipe.

[0096] There are two swirl aeration components, and the material is EPDM.

[0097] The aeration chamber 11 is trumpet-shaped as a whole, and the air distribution pipe 13 ...

Embodiment 3

[0107] This embodiment provides a method for aeration and dehardening of gasification gray water. The method is carried out using the device in Example 1, wherein the gasification gray water is aerospace furnace pulverized coal gasification gray water, and the total hardness is 1550mg / L, suspended matter content 120mg / L, turbidity 56NTU, water temperature 80℃;

[0108] The method comprises the steps of:

[0109] (1) Set the flow rate to 150m 3 / h of gasified gray water to be treated is mixed with sodium hydroxide solution to adjust the pH to 9, and then carbon dioxide is introduced into the air through the cyclone aeration module for aeration, and the flow rate of carbon dioxide is controlled to be 0.15Nm 3 / m 3 , the pressure is 0.3MPa, and microflocs such as calcium carbonate, magnesium hydroxide, and magnesium carbonate are initially formed;

[0110] (2) the gasification gray water that step (1) generates micro-floc is mixed with flocculant PAM, and the add-on of describ...

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Abstract

The invention provides a gasified grey water aeration hardness removal device, a treatment method and application. The gasified grey water aeration hardness removal device comprises a carbon dioxide aeration unit, a flocculating settling unit and a precipitation separation unit which are connected in sequence; the carbon dioxide aeration unit comprises a rotational flow aeration assembly. According to the device disclosed by the invention, gasified grey water is sequentially subjected to operations such as carbon dioxide aeration and flocculent precipitation, and particularly, the utilizationrate of carbon dioxide is increased by adopting the rotational flow aeration assembly, so that the hardness and turbidity of the gasified grey water are effectively reduced, suspended matters and thelike are removed, and therefore, the total hardness of effluent is not more than 300mg / L, the turbidity of the effluent is not more than 5NTU, and the content of the suspended matters is not more than20mg / L, the scaling and sewage blocking tendency of a gasified grey water gasification system is greatly reduced, and the long-period stable operation of the gasification system is realized. The device is high in hardness removal efficiency, small in sludge generation amount, high in automation degree, small in occupied area and suitable for treatment of various gasified grey water.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a gasification gray water aeration and dehardening device, a treatment method and application thereof. Background technique [0002] Coal gasification is one of the important ways of coal utilization. Due to the complex composition of coal, the remaining coal ash after combustion enters the water after cooling, and is continuously concentrated with the recycling of water, forming a gas rich in suspended matter, calcium and magnesium ions, silica , aluminum ions and other components of gray water, the gray water hardness, turbidity and other indicators are relatively high, and with the continuous development of the coal gasification process, the impact of the scaling of the gray water system on the operation of the coal gasification process system is becoming more and more prominent , has increasingly become the main factor restricting the long-term stable operation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F5/10
CPCC02F9/00C02F5/105C02F1/5236C02F1/66C02F1/56C02F1/5245C02F2001/007C02F1/001
Inventor 夏子辉金志娜肖东赵京京
Owner BEIJING JINGRUN NEW TECH DEV
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