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Treatment method of desulfurization wastewater

A treatment method and desulfurization wastewater technology, applied in water/sewage treatment, heating water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of large evaporation, large equipment investment, high energy consumption, and reduce water volume , the effect of reducing costs

Inactive Publication Date: 2017-06-23
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of this process are: 1. Large evaporation and high energy consumption; 2. Large investment in equipment; 3. The obtained solid salt is mixed salt, which cannot be used as a resource

Method used

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  • Treatment method of desulfurization wastewater
  • Treatment method of desulfurization wastewater
  • Treatment method of desulfurization wastewater

Examples

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Embodiment 1

[0046] This embodiment is used to illustrate the treatment method of desulfurization wastewater provided by the present invention

[0047] In the stirring state, add lime to the desulfurization wastewater, control the pH of the neutralized wastewater to be 11, and then add organic sulfur (0.003kg / m 3 desulfurization wastewater), sodium sulfate (33.8kg / m 3 desulfurization wastewater) and sodium carbonate (1.38kg / m 3 Desulfurization waste water) is stirred evenly and then precipitated. Add flocculant polyferric sulfate (0.09kg / m 3 desulfurization wastewater) and coagulant polyacrylamide (0.0005kg / m 3 desulfurization wastewater) for flocculation treatment. Then static sedimentation was carried out in the inclined plate sedimentation tank to realize solid-liquid separation. The supernatant is adjusted to pH 7 by adding acid and then subjected to ultrafiltration, and the bottom sludge is filtered by a filter press and then shipped out.

[0048] The conditions of the ultrafilt...

Embodiment 2

[0051] This embodiment is used to illustrate the treatment method of desulfurization wastewater provided by the present invention

[0052] In the stirring state, add lime to the desulfurization wastewater, control the pH of the neutralized wastewater to be 11, and then add organic sulfur (0.004kg / m 3 desulfurization wastewater), sodium sulfate (35kg / m 3 desulfurization wastewater) and sodium carbonate (1.1kg / m 3 Desulfurization waste water) is stirred evenly and then precipitated. Add flocculant polyferric sulfate (0.08kg / m 3 desulfurization wastewater) and coagulant polyacrylamide (0.0006kg / m 3 desulfurization wastewater) for flocculation treatment. Then static sedimentation was carried out in the inclined plate sedimentation tank to realize solid-liquid separation. The supernatant is adjusted to pH 8 by adding acid and then subjected to ultrafiltration, and the bottom sludge is filtered by a filter press and then transported outside.

[0053] The conditions of the ultr...

Embodiment 3

[0056] This embodiment is used to illustrate the treatment method of desulfurization wastewater provided by the present invention

[0057] In the stirring state, add lime to the desulfurization wastewater, control the pH of the neutralized wastewater to be 11, and then add organic sulfur (0.005kg / m 3 desulfurization wastewater), sodium sulfate (35.6kg / m 3 desulfurization wastewater) and sodium carbonate (1.0kg / m 3 Desulfurization waste water) is stirred evenly and then precipitated. Add flocculant polyaluminum chloride (0.09kg / m 3 desulfurization wastewater) and coagulant polyacrylamide (0.0004kg / m 3desulfurization wastewater) for flocculation treatment. Then static sedimentation was carried out in the inclined plate sedimentation tank to realize solid-liquid separation. The supernatant is adjusted to a pH of 9 by adding acid and then subjected to ultrafiltration, and the bottom sludge is filtered by a filter press and then shipped out.

[0058] The conditions of the ult...

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Abstract

The invention relates to the field of wastewater treatment and discloses a treatment method of desulfurization wastewater. The method comprises pretreatment, ultrafiltration treatment, nanofiltration treatment, membrane concentration treatment, MVR evaporative crystallization and flue evaporation treatment on the desulfurization wastewater in sequence. Pretreatment, ultrafiltration, nanofiltration, membrane concentration, MVR evaporative crystallization treatment and flue evaporation treatment are organically combined, so that zero emission of the desulfurization wastewater is achieved.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a treatment method for desulfurization wastewater. Background technique [0002] In recent years, with the growing national economy, the demand for electricity has accelerated, and the power generation has become one of the important indicators of a country's industrialization level. At present, my country mainly uses coal as the energy source for power generation. Coal-fired units are increasing year by year. The amount of coal used by thousands of thermal power plants across the country is also very large. Compared with other energy sources, coal is of lower quality and has more impurities, especially sulfur content. During the combustion process, a large amount of harmful gases such as sulfur oxides are released, causing more and more serious regional and global environmental problems. The gas desulfurization catalyst absorbs sulfur oxides to control the emission of harmful ...

Claims

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Application Information

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IPC IPC(8): C02F9/10
CPCC02F9/00C02F1/04C02F1/442C02F1/444C02F1/52C02F1/66C02F2001/007
Inventor 王祖林张翼郝剑刘喆张学勤魏书洲李永和白洁黄卫江李君占张杰
Owner CHINA SHENHUA ENERGY CO LTD
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