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Method for removing hydrogen sulfide through chromium slag

A hydrogen sulfide and chromium slag technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as killing microorganisms, human and environmental hazards, carcinogenicity, etc., to solve environmental pollution and high removal efficiency , the effect of uniform contact

Inactive Publication Date: 2015-07-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent has the following disadvantages: the device has many control units, is relatively complicated, and has high cost, and is time-consuming and laborious to operate.
The accumulation of chromium slag not only occupies the land; but also because of its high alkalinity, it will kill the microorganisms in the soil and destroy the soil, resulting in no grass growing on the accumulation site
In addition, during the long-term open-air accumulation process, hexavalent chromium will leach and migrate, pollute the surrounding soil and water, and enter the human body through the enrichment of animals and plants and the food chain, thereby endangering human health
The toxicity of hexavalent chromium is 100 times greater than that of trivalent chromium. Hexavalent chromium has carcinogenic and mutagenic effects, causing great harm to humans and the environment.

Method used

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  • Method for removing hydrogen sulfide through chromium slag
  • Method for removing hydrogen sulfide through chromium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A device for removing hydrogen sulfide from chromium slag, the structure is as follows figure 1 As shown, it includes a nitrogen storage tank 1, a gas storage tank 2 to be treated, a reaction bed, a flue gas analyzer 8 and a mixed gas temporary storage tank 6, and hydrogen sulfide gas or gas containing hydrogen sulfide is housed in the gas storage tank to be treated. The nitrogen storage tank 1 and the gas storage tank 2 to be treated are all communicated with the mixed gas temporary storage tank 6 through pipelines, and the mixed gas temporary storage tank 6 is communicated with the reaction bed through the connecting pipe 10, and the reaction bed is sand The core funnel 7, the connecting pipe 10 is connected to the bottom of the sand core funnel 7, the bottom of the sand core funnel 7 is provided with a water bath for heating the sand core funnel 7, and the top of the sand core funnel 7 is provided with a seal for sealing the sand core funnel Rubber plug, a connectin...

Embodiment 2

[0049] Utilize the device described in embodiment 1 to carry out the method for removing hydrogen sulfide, comprise steps as follows:

[0050] 1. Dry the chromium slag so that the water content of the chromium slag is controlled at 0wt%, then pulverize and pass through a 20-mesh sieve to make chromium slag powder, weigh 0.5g of chromium slag powder and place it evenly on the sand core filter plate of the sand core funnel , the tile thickness of chromium slag powder is 2cm;

[0051] 2. Heat the reaction bed to 30°C in a water bath and keep it at a constant temperature;

[0052] 3. At the same time, open the control valve between the nitrogen storage tank and the mixed gas temporary storage tank and the control valve between the gas storage tank to be treated and the mixed gas temporary storage tank to control the gas flow rate, observe the flow display instrument, adjust the flow rate, hydrogen sulfide The gas and nitrogen are passed into the mixed gas temporary storage tank 6...

Embodiment 3

[0059] Utilize the device described in embodiment 1 to carry out the method for removing hydrogen sulfide, comprise steps as follows:

[0060] 1. Dry the chromium slag so that the water content of the chromium slag is controlled at 5wt%, then pulverize and pass through a 40-mesh sieve to make a chromium slag powder, weigh 0.5g of the chromium slag powder and place it evenly on the sand core filter plate of the sand core funnel , the tile thickness of chromium slag powder is 2 cm;

[0061] 2. Heat the reaction bed to 40°C in a water bath and keep it at a constant temperature;

[0062] 3. At the same time, open the control valve between the nitrogen storage tank and the mixed gas temporary storage tank and the control valve between the gas storage tank to be treated and the mixed gas temporary storage tank to control the gas flow rate, observe the flow display instrument, adjust the flow rate, hydrogen sulfide The gas and nitrogen are passed into the mixed gas temporary storage...

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Abstract

The invention relates to a method for removing hydrogen sulfide through chromium slag. The method includes that chromium slag is dried and crushed and then is filled in a reaction bed, and chromium slag powder is heated to be at 30-50 DEG C and then is kept at constant temperature; mixed gases are filled from the bottom of the reaction bed at 80-100 SCCM constant speed, tail gases generated after reaction are discharged from the top of the reaction bed and filled into a flue gas analyzer; when the flue gas analyzer detects that the tail gases contain hydrogen sulfide, the tail gases discharged from a gas outlet of the flue gas analyzer are filled into alkaline liquor, and when the flue gas analyzer detects that concentration of hydrogen sulfide reaches 10-20mg / m<3>, filling of mixed gases is stopped. The method solves the problems of chromium slag poison and hydrogen sulfide removing, raw materials are pollution sources, and therefore the effect of using waste to treat waste is achieved. Treated chromium slag can be used as building materials and causes no secondary pollution.

Description

technical field [0001] The invention relates to a method for removing hydrogen sulfide, in particular to a method for removing hydrogen sulfide by using chromium slag, and belongs to the technical field of environmental protection. Background technique [0002] Hydrogen sulfide is a colorless gas. Low concentration hydrogen sulfide has a strong stench of rotten eggs. It is a strong nerve poison and can directly endanger human health. Odor pollution has been considered as one of the six major public hazards after noise. one. Hydrogen sulfide gas (H2S) will be produced in natural gas purification, petroleum refining, coal chemical industry, municipal sewage treatment projects and sludge treatment and disposal process, its content is relatively high compared with other components, and its toxicity is strong. The smell threshold is low, and the pollutant discharge standard index value is low. The malodorous gas produced by it has caused a lot of secondary pollution and serious...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/82B01D53/52
Inventor 岳敏林聪孙艳秋杨文心岳钦艳徐世平
Owner SHANDONG UNIV
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