Kiln system for producing sodium sulfide by using industrial hazardous waste sodium sulfate and method thereof

A technology of hazardous waste sodium sulfate and sodium sulfide, which is applied in chemical instruments and methods, separation methods, alkali metal sulfides/polysulfides, etc., and can solve problems such as unstable product quality, low equipment operation rate, and high manufacturing costs. Achieve the effects of heat energy recovery, high operating rate and long service life

Pending Publication Date: 2020-12-15
刘德奎 +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In view of the above problems, the object of the present invention is to provide a kiln system and method for producing sodium sulfide with industrial hazardous waste sodium sulfate, so as to solve the problem of low operating rate of existing equipment, high manufacturing cost, unstable product quality and low grade. question

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  • Kiln system for producing sodium sulfide by using industrial hazardous waste sodium sulfate and method thereof
  • Kiln system for producing sodium sulfide by using industrial hazardous waste sodium sulfate and method thereof
  • Kiln system for producing sodium sulfide by using industrial hazardous waste sodium sulfate and method thereof

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Embodiment

[0070] After the kiln system of the present invention is built in the Panxi area, within one month of production, tracking, measurement, statistics and detection of each process have been carried out. The result is as follows:

[0071] 1) Main indicators of raw materials:

[0072] A. Solid waste sodium sulfate:

[0073] Na 2 SO 4 60-70%;H 2 O 28%; V 2 o 5 0.3%; other 1.7%;

[0074] B. Anthracite:

[0075] Fixed carbon ≥ 70%; Ash ≤ 18%; Volatile matter ≤ 10%; Water ≤ 2%;

[0076] C. Semi-coke, fixed carbon ≥ 80%; ash ≤ 10%; volatile matter ≤ 8%; water ≤ 1%;

[0077] D. Natural gas ≥ 9800 kcal / m 3 ;

[0078] 2) According to the product volume of 200 tons, the average consumption per ton is calculated:

[0079] A solid waste sodium sulfate 2.1 tons / t consumption;

[0080] B Anthracite 0.3 tons / t consumption;

[0081] C semi-coke 0.1 ton / t consumption;

[0082] D natural gas 280m 3 / t consumption;

[0083] E power consumption 110 degrees / t consumption;

[0084]...

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Abstract

The invention belongs to the technical field of hazardous waste treatment, and particularly relates to a kiln system for producing sodium sulfide by using industrial hazardous waste sodium sulfate anda method thereof. The system comprises a converter, an open-hearth furnace, a flue and a flue gas dedusting and purifying system which are sequentially connected; the converter is used for decomposing and melting hazardous waste industrial waste residues; the open-hearth furnace is used for precipitation purification and reduction reaction of the hazardous waste industrial waste slag molten liquid to generate sodium sulfide crude alkali; and the flue gas dedusting and purifying system is used for dedusting and purifying flue gas. According to the system, independent decomposition and meltingof raw materials, solution purification and independent reduction reaction are adopted, continuous production is achieved, the equipment operation rate is high, the manufacturing cost is low, and theproduct quality is stable.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment, and in particular relates to a kiln system and a method for producing sodium sulfide from industrial hazardous waste sodium sulfate. [0002] technical background [0003] Industrial solid waste sodium sulfate (Na 2 SO 4 .nH 2 O.nR), belongs to hazardous waste, and its content is mostly about 50-80%. It is easily soluble in water, highly corrosive, and has a strong destructive effect on soil, water resources, animals and plants. The solid waste sodium sulfate mainly comes from the industrial waste liquid produced in metallurgy, chemical industry, mineral flotation and other industries, and the crystalline solid-sodium sulfate is obtained by concentration and pressure filtration. Because it is produced in various industries, its grade and impurity content vary greatly, and most of them cannot be reused. [0004] Product sodium sulfide (Na 2 S.nH 2 O), commonly known as stink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/26F27B7/20F27B7/34F27B7/32F27D1/08F27D17/00F27D27/00B01D50/00B03C3/017
CPCB01D50/00B03C3/017C01B17/26F27B7/20F27B7/3205F27B7/34F27D1/08F27D17/004F27D27/00
Inventor 刘德奎阳建国徐会权肖志民
Owner 刘德奎
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