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Harmless processing technology for waste dangerous chemical containing mercury

A technology for the harmless treatment of hazardous chemicals, applied in the direction of protection devices against harmful chemicals, etc., can solve the problem of lack of harmless disposal of mercury-containing hazardous chemicals, the lack of disposal qualifications and actual disposal capabilities, destruction units, safety Hidden dangers and other problems, to achieve the effect of eliminating hidden dangers of social safety, strong practicability, and avoiding safety risks

Active Publication Date: 2015-02-25
浙江归零环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with developed countries, my country lacks the technology that can truly realize the harmless disposal of waste mercury-containing hazardous chemicals. So far, there has not been a domestic destruction unit with corresponding disposal qualifications and actual disposal capabilities.
In most areas, mercury-containing highly toxic drugs have been stored for many years and have not been safely destroyed, so there is a great potential safety hazard

Method used

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  • Harmless processing technology for waste dangerous chemical containing mercury
  • Harmless processing technology for waste dangerous chemical containing mercury

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 pilot test process:

[0035] (1) Processing object

[0036] Suzhou Shangmei International Cosmetics Co., Ltd. contains highly toxic mercury, 49.5g of mercury iodide, 488.9g of mercury chloride, 223.3g of mercury sulfate, and 1988.1g of mercury acetate.

[0037] (2) Treatment process

[0038] Process flow diagram as figure 1 Shown:

[0039] In a mobile reactor, add the above-mentioned mercury-containing highly toxic mixture to 3000g of water, and add nitric acid to help dissolve it, so that the pH value of the solution is less than 2; then add hydrogen peroxide (the mass percentage concentration of hydrogen peroxide is 20%-30%) to carry out Oxidation reaction in which the H in hydrogen peroxide is controlled 2 o 2 The molar ratio of mercury to mercury in waste containing mercury is 2.5:1. After the reaction was carried out for 1 hour, all the organic mercury and monovalent mercury in the reaction system were converted into Hg 2+ .

[0040] Then add s...

Embodiment 2

[0047] Embodiment 2 engineering application:

[0048] (1) Processing object

[0049] Wujiang Lvyi Solid Waste Recycling and Disposal Co., Ltd. contains hazardous chemicals containing mercury, 218kg, with a mercury content (average) of 47.18%, and leached mercury of 2378mg / L.

[0050] (2) Process parameters of each processing unit

[0051] Reaction pool: The reaction pool is PP structure, the size is ￠3.0m×2.2m, and the effective volume is 14m 3 , equipped with a stirring device with a power of 7.5kW, an exhaust system on the top (the power of the induced draft fan is 5.5kW), and a set of plate and frame filter press (80m 2 ).

[0052] Curing machine: twin-shaft forced mixer, productivity 25m 3 / h.

[0053] Process flow diagram as figure 1 Shown:

[0054] 100kg of the above-mentioned mercury-containing highly toxic mixture is added to 100kg of water, and nitric acid is added to aid dissolution, so that the pH value of the solution is less than 2; then hydrogen peroxide (...

Embodiment 3

[0061] Embodiment 3 pilot test process:

[0062] (1) Processing object

[0063] Suzhou Shangmei International Cosmetics Co., Ltd. contains highly toxic mercury, 49.5g of mercury iodide, 488.9g of mercury chloride, 223.3g of mercury sulfate, and 1988.1g of mercury acetate.

[0064] (2) Treatment process

[0065] Process flow diagram as figure 1 Shown:

[0066] In a mobile reactor, add the above-mentioned mercury-containing highly toxic mixture to 3000g of water, and add nitric acid to help dissolve it, so that the pH value of the solution is less than 2; then add hydrogen peroxide (the mass percentage concentration of hydrogen peroxide is 20%-30%) to carry out Oxidation reaction in which the H in hydrogen peroxide is controlled 2 o 2 The molar ratio of mercury to mercury in waste containing mercury is 2.5:1. After the reaction was carried out for 1 hour, all the organic mercury and monovalent mercury in the reaction system were converted into Hg 2+ .

[0067] Then add s...

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Abstract

The invention provides a harmless processing technology for waste dangerous chemical containing mercury. The technology comprises the following steps: 1) adding waste containing mercury into water and adjusting a pH to less than 2; then adding hydrogen peroxide to converse all organic mercury in a reaction system to Hg<2+>; 2) adjusting a ph of the reaction system to 11-12 and heating to remove excess hydrogen peroxide; 3) adding compound sulfide to converse all Hg<2+> in the reaction system to HgS deposition, and adding ferrous salt to precipitate excess S<2->; 4) adding solidification materials into the depositions and a waste liquid from step 3) and carrying out solidification treatment to obtain a cement solidified body. The technology provided by the invention combines a chemical treatment and a cement solidification technology organically; and a mercury leaching toxicity of the obtained cement solidified body is less than 0.1mg / L to meet relevant national harmlessness standard.

Description

technical field [0001] The invention belongs to the technical field of waste treatment technology, and in particular relates to a harmless treatment process for waste hazardous chemicals containing mercury. Background technique [0002] Solidification technology is an important means to deal with heavy metal waste and other non-metal hazardous waste. Hazardous wastes are immobilized in an inert, impermeable matrix by solidification. After solidification, toxic and harmful pollutants can be transformed into substances with relatively stable physical and chemical characteristics with low solubility, low migration and low toxicity. [0003] The mechanism of solidification technology to stabilize waste components is the combined action of the chemical bonding force between waste and coagulant, the physical inclusion of coagulant on waste, and the adsorption of hydration products of coagulant to waste, so that waste can be transformed into immobile solid or compact solid, Change...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/33A62D3/38A62D101/43A62D101/24
Inventor 孙斌陈燕
Owner 浙江归零环保科技有限公司
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