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Method and system for zero emission treatment of desulfured waste water

A desulfurization wastewater and treatment system technology, applied in the field of flue gas purification, can solve the problems of wastewater chlorine ions cannot be removed, labor-intensive, and harmful, and achieve the effects of saving manpower, convenient zero-emission treatment, and simple method implementation

Active Publication Date: 2013-07-17
CHENGDU SHUKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high content of mercury, lead, nickel, arsenic and chromium heavy metal ions in the waste water of the wet flue gas desulfurization system, the direct discharge is very harmful, and the common chemical treatment method is too complicated, and needs to continuously add chemicals, which is labor-intensive
In addition, the chlorine ions in the wastewater treated by the chemical treatment method of desulfurization wastewater (currently there is no chemical agent that can remove chloride ions) still cannot be removed

Method used

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  • Method and system for zero emission treatment of desulfured waste water
  • Method and system for zero emission treatment of desulfured waste water

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Embodiment 1

[0032] Such as figure 1 As shown, the desulfurization wastewater zero-discharge treatment system of the present invention includes a pre-sedimentation tank 2, a supernatant liquid treatment device and a lower solid-liquid treatment device; connected;

[0033] The structure of the pre-sedimentation tank consists of a columnar upper part and a funnel-like lower part connected below the upper part, wherein the upper part is used to hold the separated clear liquid, and the lower part is used to hold the separated solid matter due to gravity sedimentation of turbid liquid.

[0034] The supernatant liquid treatment device comprises a buffer tank 5, a spraying device, a sludge buffer tank 12 and a filter press 15; the buffer tank 5 is connected to the pre-sedimentation tank 2 by a slurry pump 14, and the inlet of the slurry pump 4 is arranged at the pre-settling tank 2. The upper part of the pool 2; the atomization device is connected to the buffer pool 5 through a pipeline, and th...

Embodiment 2

[0042] Such as figure 2 As shown, the difference between this embodiment and the first embodiment lies in that the structure of the filtering device is different.

[0043] In this embodiment, the filter device is a filter screen 17, and the upper part of the pre-sedimentation tank 2 and the buffer tank are separated by a filter screen. The advantage of this method is that a slurry pump is saved, and the cost is reduced. It is suitable for occasions with small processing volume.

[0044] Based on the above-mentioned system, the zero-discharge treatment method of desulfurization wastewater of the present invention comprises the following steps:

[0045] 1) Discharge the desulfurization wastewater desulfurized by the desulfurization tower into the pre-sedimentation tank, and undergo preliminary separation in the pre-sedimentation tank. The separation time is 3 to 5 minutes, and the separated supernatant is transported to the buffer tank by the slurry pump ;

[0046] 2) The d...

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Abstract

The invention discloses a method for zero emission treatment of desulfured waste water. The method comprises the following steps: 1) discharging the desulfured waste water obtained after desulfuration in a desulfuration tower into a preliminary sedimentation tank, carrying out primary separation in the preliminary sedimentation tank, and transporting an upper clear liquid separated out to a buffer pool through a slurry pump; 2) successively passing the desulfured waste water in the buffer pool through an atomization plant and a static dust catcher; 3) transporting the waste water which is from the lower part of the preliminary sedimentation tank and has large solid content to a filter press through an another sludge pump; and 4) feeding the waste water filtered back to the preliminary sedimentation tank through the slurry pump. Simultaneously, the invention also discloses a system for zero emission treatment of desulfured waste water. The zero emission treatment is conveniently carried out on the desulfured waste water through the method, the process is simple and labor is saved; and the system has a compact structure, the method is simple to implement, energy is saved, the quality of smoke at the inlet of the dust catcher is improved, the zero emission of the desulfured waste water can be really achieved, thus the system has the advantage of popularization value.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and relates to the treatment of flue gas discharged from a coal-fired boiler, in particular to a method for zero discharge of waste water in a wet desulfurization project, and a system. Background technique [0002] my country is a country that uses coal as the main energy source, and coal-fired power generation is one of the most important ways of coal utilization in my country. According to my country's national conditions, coal-fired power generation will still dominate in the 21st century. Among the many air pollutants emitted by coal-fired thermal power units, SO 2 And the dust is more harmful to the environment and is the main pollutant to be controlled. With the progress of society and the development of economy, the pollution of thermal power plants to the atmospheric environment has been widely concerned by people. Therefore, it is a severe challenge for the sustainable d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F103/18
Inventor 潘良明邓佳佳陈德奇
Owner CHENGDU SHUKE TECH
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