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Desulfurizing method using soda waste liquid and calcium carbide waste residue

A technology of calcium carbide waste residue and waste liquid, which is applied in the direction of chemical instruments and methods, separation methods, and separation of dispersed particles, can solve the problems of huge investment and high operating costs, and achieve the effect of low investment, low operating costs and simple operation

Inactive Publication Date: 2008-11-19
康仁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various desulfurization processes have their own advantages and disadvantages. The existing wet chemical desulfurization process is simple and requires less investment, but the operating cost is high; the imported "limestone / gypsum desulfurization" has a huge investment, which ordinary enterprises cannot afford

Method used

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  • Desulfurizing method using soda waste liquid and calcium carbide waste residue
  • Desulfurizing method using soda waste liquid and calcium carbide waste residue
  • Desulfurizing method using soda waste liquid and calcium carbide waste residue

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Embodiment Construction

[0031] First, a desulfurization tower is fabricated according to the structure shown in Fig. 3 . Tower height H=5m, diameter d=2.5m, packing layer height h=0.5m. The filler is ceramic ring, PVC ball or iron filings.

[0032] Fix the desulfurization tower according to the arrangement in Figure 2.

[0033] According to the arrangement in Figure 2, the circulation tank (2m×2m×1.6m), the clarification tank (3m×3m×1.1m) and the neutralization tank (2m×2m×1.1m) are made of concrete.

[0034] The pump and piping are installed according to Figure 2.

[0035] The prepared 15% CaCl 2 The solution is put into the circulation tank (3), and the prepared milk of lime is put into the neutralization tank (5).

[0036] Start the centrifugal pump to circulate the CaCl in the pool 2 The solution is sent to the desulfurization tower, and after 5-10 minutes of operation, the flue gas inlet is opened, and the flue gas enters the desulfurization tower from A, and the desulfurization work begins...

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Abstract

The invention discloses a method for removing SO2 by utilizing soda ash waste liquid and carbide waste slag. CaCl2 in the soda ash waste liquid is utilized to react with the SO2 in flue gas, white CaSO3 settlement is generated, HCl is released and dissolved in water to form hydrochloric acid with very low concentration; Ca(OH)2 in the carbide waste slag is used for neutralizing HCl and generating CaCl2 and water, and CaCl2 is recycled. The desulphurization process mainly consumes Ca(OH)2 in the carbide waste slag. If no local soda ash waste liquid, calcium chloride dehydrate (CaCl2*2HO) produced by the soda ash waste liquid can be purchased for preparing CaCl2 solution. The carbide waste slag can be replaced by lime. The process is characterized by one high, two low and three points of environmental protection. The process firstly has high desulphurization rate, secondly has low fixed-asset investment and low running costs and thirdly utilizes the waste liquid and the waste slag to reduce the environmental pollution. Compared with all prior desulphurization processes, the process has great advantages.

Description

Technical field: [0001] The invention belongs to the field of chemical industry, in particular to a chemical wet desulfurization process. Background technique: [0002] In recent years, the state has strengthened the monitoring and control of the atmospheric environment, and formulated emission standards, such as "dust emission standards for industrial furnaces", "emission standards for air pollutants from power plants", and "atmospheric environmental quality standards". SO in soot emissions in these standards 2 The content is strictly regulated. The environmental protection departments in various regions strictly enforce the law. Enterprises that exceed the emission standards are required to rectify within a time limit or suspend production for rectification. Those that fail to meet the standards must be closed down. In this situation, various desulfurization processes came into being. Most of these desulfurization processes are wet chemical desulfurization, such as caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/80
Inventor 康仁
Owner 康仁
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