Harmless disposal and comprehensive utilization method for high-salt chemical sludge

A technology of chemical sludge and high salt content, applied in chemical instruments and methods, water/sludge/sewage treatment, combustion methods, etc. The equipment has the advantages of low cost, simple structure, easy maintenance and replacement

Active Publication Date: 2017-11-24
CHONGQING ANGRUIYUE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the one hand, high-salt chemical sludge contains water and is easy to agglomerate, making it difficult to treat; on the other hand, it cannot be directly used as industrial raw materials because it contains toxic and harmful chemicals. Therefore, most of the current treatment methods of most enterprises mainly include the following: Types: ①Salt washing method, washing the salt slag with water or an organic solvent to remove impurities in the salt slag as much as possible, and the treated salt is used in the combined soda industry, but this method is only suitable for by-products with little impurity content and a single impurity component Salt slag is produced, and there are secondary pollution problems such as reprocessing of water or organic solvents used for washing. In addition, the impurities in the by-product salt slag are difficult to clean, and the residual amount is also unstable, making it difficult to realize industrialization; ② high temperature treatment method, The salt residue is treated at high temperature, so that the organic impurities con

Method used

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  • Harmless disposal and comprehensive utilization method for high-salt chemical sludge
  • Harmless disposal and comprehensive utilization method for high-salt chemical sludge
  • Harmless disposal and comprehensive utilization method for high-salt chemical sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 Negative pressure cycle thermal storage incineration recovery equipment

[0044] Such as Figure 1-5 As shown, the negative pressure cycle heat storage incineration recovery equipment of the present invention includes a mixing system 1, a trolley type incineration system 2, an exhaust system 3, a flue gas circulation system 4, a salt recovery system 5, a transmission system 6 and a flue gas purification system 7 , the mixing system 1 includes a plurality of silos 11, a metering scale 12, and a mixing and stirring device 13. The discharge port of the silo 11 is aligned with the weighing pan of the weighing scale 12, and the weighing pan of the weighing scale 12 Corresponding to the feed port of the mixing and stirring device 13, the discharge port of the mixing and stirring device 13 is connected to the transmission system 6, and the lime, chaff and biomass fuel in the silo 11 are weighed by the metering scale 12, and then sent to the mixing and stirring device...

Embodiment 2

[0050] Example 2 Comprehensive Utilization of High Salt Chemical Sludge

[0051] Step 1: crush the high-salt chemical sludge to a particle size of 3-12mm, mix the sludge with lime, chaff, and biomass fuel at a mass ratio of 45:5:15:35 to prepare a mixture, and the chaff The particle size of the biomass fuel is 2-8mm, the particle size of the biomass fuel is 1-8mm, and the calorific value is 5000 kcal;

[0052] Step 2: The mixture obtained in step 1 is sent into the trolley type incineration system of the negative pressure cycle heat storage incineration recovery equipment described in Example 1, the thickness of the mixture is 500mm, and the advancing speed of the mixture is 0.16m / s. Ignition and incineration, the waste gas discharged by the flue gas purification device 7 meets the EU 2000 standard, the salt recovery rate is 90%, and the purity (organic content) is less than 1%.

Embodiment 3

[0053] Example 3 Comprehensive Utilization of High Salt Chemical Sludge

[0054] Step 1: crush the high-salt chemical sludge to a particle size of 4-10mm, mix the sludge with lime, chaff, and biomass fuel at a mass ratio of 60:2:10:28 to prepare a mixture, and the chaff The particle size of the biomass fuel is 2-8mm, the particle size of the biomass fuel is 1-8mm, and the calorific value is 5000 kcal;

[0055] Step 2: The mixture obtained in step 1 is sent into the trolley type incineration system of the negative pressure circulation heat storage incineration recovery equipment described in Example 1, the thickness of the mixture is 700mm, and the advancing speed of the mixture is 0.08m / s. Ignition and incineration, the exhaust gas discharged by the flue gas purification device 7 meets the EU 2000 standard, the salt recovery rate is 92%, and the purity (organic content) is less than 1%.

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Abstract

The invention belongs to the technical field of solid waste disposal, and particularly relates to a harmless disposal and comprehensive utilization method for high-salt chemical sludge. According to the method, negative-pressure cyclic heat storage, incineration and recycling equipment is adopted, maintenance and replacement are easy, the use cost of the equipment is low, harmless disposal of the high-salt chemical sludge can be achieved, salt in the sludge is recycled, the technical problem that the high-salt chemical sludge is fused, forms rings, is caked and the like under the high-temperature condition to cause severe destruction to an incinerator can be solved, the incineration effect is improved, and energy conservation and environmental friendliness are achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a comprehensive utilization method for harmless disposal of high-salt chemical sludge. Background technique [0002] High-salt chemical sludge refers to the sludge that contains organic matter, other toxic and harmful substances, and water produced in industrial production processes, and is mainly composed of inorganic waste salt. It is used in the production process of many fine chemicals, chemical pesticide products or intermediates. , will be accompanied by the production of a large amount of high-salt chemical sludge. For example, for every ton of hydrazine hydrate produced, 4-5 tons of by-product high-salt chemical sludge containing toxic and harmful chemicals will be produced. For every ton of glyphosate pesticide produced , will produce 1.1-1.4 tons of by-product high-salt chemical sludge containing toxic and harmful chemicals. With the developmen...

Claims

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Application Information

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IPC IPC(8): F23G7/00F23G5/033F23G5/04F23G5/50C02F9/00
CPCC02F1/001C02F1/04C02F1/041C02F1/38C02F1/52C02F1/66C02F9/00C02F2001/5218C02F2301/046C02F2301/08F23G5/033F23G5/04F23G5/50F23G7/00F23G2203/80F23G2205/121F23G2209/12
Inventor 李秉正李一吴汕
Owner CHONGQING ANGRUIYUE SCI & TECH
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