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Treatment device and treatment method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and cod in desulfurization wastewater

A technology for desulfurization wastewater and treatment methods, which is applied in chemical instruments and methods, gaseous discharge wastewater treatment, water/sewage multi-stage treatment, etc. Stable operation, unique effects conceived

Active Publication Date: 2018-05-29
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 treatment method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and cod in desulfurization wastewater

Examples

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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 a treatment method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization wastewater. The characteristics of the treatment device are: the overflow port of the sedimentation tank is connected to the No. 1 delivery pump through a pipeline, the stirring device of the primary clarifier is installed on the primary clarifier, and the No. 2 delivery pump is connected to the third reaction tank through a pipeline. The steps of the treatment method are as follows: after desulfurization wastewater enters the sedimentation tank for primary precipitation, the effluent enters the first reaction box and the second reaction box for chemical-coagulation sedimentation reaction in turn, and then enters the primary clarifier for solid-liquid separation; the supernatant liquid Introduced into the third reaction box, and the reacted mixed liquid then entered the flocculation box and the secondary clarifier in turn, respectively for flocculation reaction and clarification and concentration; the supernatant liquid was introduced into the filtration device for filtration, and the pH of the effluent was adjusted to 6-9. The present invention simultaneously removes high concentrations of SS, fluoride, sulfate, arsenate and COD in desulfurization wastewater economically and effectively.

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 Patents(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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