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Treatment device and method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization waste water

A kind of technology of desulfurization wastewater and treatment method

Active Publication Date: 2016-03-02
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention mainly aims at the problem that the concentration of SS, fluoride, sulfate, arsenate and COD in the desulfurization wastewater is high at present, but the existing treatment process cannot meet the discharge requirements, and provides a kind of structure design that is reasonable and removes the high concentration in the desulfurization wastewater at the same time. SS, fluoride, sulfate, arsenate and COD treatment device and treatment method

Method used

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  • Treatment device and method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0028] see figure 1 In this embodiment, the treatment device for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization wastewater includes a sedimentation tank 1 provided with a sedimentation tank overflow port 2, a No. 1 delivery pump 3, and a The first reaction tank 4 of the first reaction tank overflow port 8, the aeration device 5 and the blower 6 arranged at the bottom of the first reaction tank 4 are used to add CaO or Ca(OH) 2 The No. 1 dosing device 7, the second reaction tank 9 with the second reaction tank overflow port 12, the second reaction tank stirring device 10, the No. 2 dosing device for adding calcium salt, acid and flocculant 11. The primary clarifier 13 with the primary clarifier overflow port 17, the primary clarifier stirring device 14, the No. 1 sludge delivery pump 15, the sludge disposal mechanism 16, the No. 2 delivery pump 18, and the third The third reaction box 19 of the overflow port 22 of the rea...

Embodiment 2

[0045] see figure 1 In this embodiment, the treatment device for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization wastewater includes a sedimentation tank 1 provided with a sedimentation tank overflow port 2, a No. 1 delivery pump 3, and a The first reaction tank 4 of the first reaction tank overflow port 8, the aeration device 5 and the blower 6 arranged at the bottom of the first reaction tank 4 are used to add CaO or Ca(OH) 2 The No. 1 dosing device 7, the second reaction tank 9 with the second reaction tank overflow port 12, the second reaction tank stirring device 10, the No. 2 dosing device for adding calcium salt, acid and flocculant 11. The primary clarifier 13 with the primary clarifier overflow port 17, the primary clarifier stirring device 14, the No. 1 sludge delivery pump 15, the sludge disposal mechanism 16, the No. 2 delivery pump 18, and the third The third reaction box 19 of the overflow port 22 of the rea...

Embodiment 3

[0060] see figure 1 In this embodiment, the treatment device for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization wastewater includes a sedimentation tank 1 provided with a sedimentation tank overflow port 2, a No. 1 delivery pump 3, and a The first reaction tank 4 of the first reaction tank overflow port 8, the aeration device 5 and the blower 6 arranged at the bottom of the first reaction tank 4 are used to add CaO or Ca(OH) 2 The No. 1 dosing device 7, the second reaction tank 9 with the second reaction tank overflow port 12, the second reaction tank stirring device 10, the No. 2 dosing device for adding calcium salt, acid and flocculant 11. The primary clarifier 13 with the primary clarifier overflow port 17, the primary clarifier stirring device 14, the No. 1 sludge delivery pump 15, the sludge disposal mechanism 16, the No. 2 delivery pump 18, and the third The third reaction box 19 of the overflow port 22 of the rea...

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Abstract

The invention relates to a treatment device and method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization waste water. The treatment device is characterized in that an overflowing port of a settling pond is connected with a first delivery pump through a pipeline, a first-level defecator stirring device is installed on a first-level defecator, and a second delivery pump is connected with a third reaction tank through a pipeline. The treatment method includes the steps that the desulfurization waste water enters the settling pond for primary settling, and then outlet water sequentially enters a first reaction tank and a second reaction tank to be subjected to a chemical-coagulating sedimentation reaction and then enters the first-level defecator for solid-liquid separation; supernate is introduced into the third reaction tank, mixed liquid after the reaction sequentially enters a flocculation tank to be subjected to a flocculation reaction and a second-level defecator to be defecated and concentrated; the supernate is introduced into a filtering device to be filtered, and the pH value of output water is adjusted to be 6-9. The high-concentration SS, fluoride, sulfate, arsenate and COD in the desulfurization waste water are effectively and simultaneously removed.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and more specifically relates to a treatment device and a treatment method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization wastewater. Background technique [0002] Limestone-gypsum wet desulfurization is the most widely used and most mature flue gas desulfurization process in the world. During the operation of this process, a certain amount of desulfurization wastewater (FGD wastewater) will be generated. The water quality of this desulfurization wastewater is slightly acidic (pH is generally 4~ 6), containing a large amount of suspended solids, high COD, high salt content, and contains a variety of heavy metals (Hg, Cr, Cd, Pb, As, etc.). For this desulfurization wastewater, the treatment process commonly used in thermal power plants is the traditional "neutralization-precipitation reaction-flocculation" process. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/18C02F101/14C02F101/10
Inventor 韩飞超陈光衡世权
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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