Method and device for removing harmful gas

A technology for harmful gas and gas import, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation. Low cost and operating expenses, simple operation effect

Inactive Publication Date: 2016-09-21
黄立维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The activated carbon adsorption method has a high removal efficiency for low-concentration pollutants, but the regeneration of the adsorbent and the subsequent treatment system are complicated, and there is a danger of flammability and explosion

Method used

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  • Method and device for removing harmful gas
  • Method and device for removing harmful gas
  • Method and device for removing harmful gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of circulating fluidized bed gas-solid reactor device that removes harmful gas from the gas stream such as figure 1 shown. The circulating fluidized bed gas-solid reactor has a diameter of Φ60mm and a height of 2500mm, of which the effective height is about 1600mm, and the material is stainless steel. The experimental conditions are: the carrier gas is air, the flow rate is about 3m 3 / h, the gas temperature is about 25°C, the relative humidity of the gas is about 70%, the calcium chloride is commercially available industrial grade powder particles, the purity is above 98%, and the average particle size is about 0.1mm. The calcium chloride is first heated by an electric heater After reaching about 40°C-50°C, put it into the reactor, the temperature of the reactor is about 30°C, and the gas-solid contact time in the reactor is about 3-5s. The molar ratio of harmful substances to calcium chloride is about 1:15. After the reaction, the solid particl...

Embodiment 2

[0022] Embodiment 2: 20% (volume) of quartz sand with a particle size of about 1.5 mm is mixed in the material. Other conditions are with embodiment 1. The experimental results are shown in Table 2.

[0023] Table 2 Harmful substance removal effect

[0024]

Embodiment 3

[0025] Embodiment 3: a kind of gas-solid countercurrent contact reactor device that removes harmful gas such as figure 2shown. Its treatment process is that the harmful gas to be treated enters the gas-solid reactor tower body (2) from the gas inlet (1) and the calcium chloride powder added from the solid particle inlet (3) in the gas-solid reaction zone ( 5) A chemical adsorption reaction occurs, the purified gas flow is discharged from the gas outlet (4), and the solid particles after the reaction pass through the solid particle recovery area (6) and then are discharged through the solid particle discharge port (7). The diameter of the reactor is Φ60mm , the height is 1500mm, the material is stainless steel, and the effective height of the gas-solid reaction zone is about 1000mm. The molar ratio of harmful substances to calcium chloride dosage is about 1:30. The carrier gas is air, the flow rate is about 1m 3 / h, the gas-solid contact time in the reactor is about 10-15s....

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Abstract

The invention discloses a method and device for removing harmful gas, and belongs to the technical field of air pollution control and environmental protection. Volatile organic matters such as alcohol, amine, acyl matters, ketone, aldehyde and ester in airflow and inorganic maters including hydrogen sulfide, ammonia and the like are removed. The method comprises the processing steps that airflow containing harmful gas is introduced into a gas-solid reactor, calcium chloride solid particles at the certain temperature are introduced into the gas-solid reactor, the certain gas-solid reaction temperature is controlled, harmful gas in the airflow is subjected to a gas-solid adsorption chemical reaction with a calcium chloride in the gas-solid reactor, and a solid product is generated, so that the purpose of purifying gas is achieved, and the solid product is heated and regenerated. The invention further discloses a special device, and has the advantages of being low in investment cost and operation cost, capable of recycling by-products, easy to operate, and high in processing efficiency.

Description

technical field [0001] The invention relates to a method and device for removing harmful gases, in particular to removing volatile organic compounds such as alcohols, amines, acyls, ketones, aldehydes and esters, inorganic substances such as hydrogen sulfide and ammonia from airflow, and belongs to air pollution control and environmental protection. protect the technical field. Background technique [0002] Various harmful gases containing volatile organic compounds such as alcohols, amines, acyls, ketones, aldehydes and esters, etc., produced in various production processes such as chemical, pharmaceutical, printing and spraying, harmful gases containing inorganic substances such as hydrogen sulfide and ammonia , Produced in chemical production, wastewater anaerobic treatment and other processes. These pollutants are not only harmful to the human body, but also have a serious impact on the atmospheric environment when discharged in large quantities. However, because these...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/44B01D53/96
CPCB01D53/44B01D53/81B01D53/96B01D2251/404
Inventor 黄立维
Owner 黄立维
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