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Method and device for removing smog in air flow

An air flow and smoke technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of large water consumption, large equipment investment, complex system, etc., and achieve low operating costs, low investment costs, and high processing efficiency. Effect

Pending Publication Date: 2018-12-07
黄华丽
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The water vapor, oil mist, volatile organic compounds, smoke and particle pollutants in the airflow are mainly produced in the waste gas flow discharged from various production processes such as metal pickling, food processing, coating, textile and fuel combustion. Many waste gases are At a certain temperature, it is difficult to have an effective and simple treatment method for these pollutants. For example, the exhaust gas of oil fume is generally collected by a smoke collection device, and then treated by electrostatic oil fume purification and water washing treatment devices, but the electrodes of the electrostatic purification device are easily Pollution, and there is a fire hazard; water absorption can not achieve satisfactory removal effect because many organic substances in the waste gas are difficult to dissolve in water; lime / limestone and other lye absorption methods are currently used in the flue gas generated by fossil fuel combustion in thermal power plants, etc. The main method of sulfur dioxide, but this method requires a large amount of water consumption, large equipment investment, complex system, high water vapor content in the exhaust gas after treatment, and has not been treated pollutants, there are further treatment requirements

Method used

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  • Method and device for removing smog in air flow
  • Method and device for removing smog in air flow

Examples

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Effect test

Embodiment 1

[0018] Embodiment 1: the device of the purifying method of smoke in a kind of moving bed airflow of the present invention is as figure 1 shown. The device is made of stainless steel, and the device is a rectangular cylinder with a size of about 500 × 350 × 1500 (length × width × height, the unit is mm, the same below), and the rotary chain grate is similar to the boiler grate. Structure, there are ventilation gaps evenly distributed on the grate, which is convenient for air flow. The solid material is made of hollow stainless steel balls, the outer diameter is about Φ25, and the material is fed by a conveyor. The stacking height of the hollow stainless steel balls on the grate is about 300, and the gas inlet And the gas outlet diameter is Φ150.

[0019] The treatment process flow is as follows: the smoke-containing gas flow is introduced into the device from the gas inlet (1), passes through the gas-solid contact zone (5) after passing through the gas distributor (2) and the ...

Embodiment 2

[0021] Example 2: The exhaust gas containing soot is the exhaust gas produced by the high-temperature setting machine for textile printing and dyeing fabrics, and the main pollutant is particulate matter of about 150mg / m 3 , the oil fume concentration is about 300mg / m 3 . Gas flow is about 100m 3 / h, the waste gas flow gas inlet is about 150°C, the humidity is about 85%, and other conditions are the same as in Example 1. Experimental results The experiment shows that the moisture in the gas outlet airflow is reduced by about 30%, and the oil fume concentration in the airflow is about 100mg / m 3 , the concentration of solid particles is about 70mg / m 3 .

Embodiment 3

[0022] Example 3: The exhaust gas containing soot in this example is the exhaust gas produced by the metal smelting and quenching production process, and the main pollutant is solid particulate matter with a concentration of about 150 mg / m 3 , the average soot concentration is about 500mg / m 3 . Gas flow is about 50m 3 / h, the gas inlet of the waste gas flow is about 60°C, the humidity is about 70%, and the temperature of the solid material before the hollow stainless steel ball is fed is about 20-25°C. Other conditions are with embodiment 1. Experimental results The experimental results show that the concentration of soot in the gas outlet airflow is about 150mg / m 3 , the concentration of solid particles is about 50mg / m 3 .

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Abstract

The invention discloses a method for removing smog in air flow, and belongs to the technical fields of atmospheric pollution control and environment protection. The method is mainly used to remove substances in air flow such as water steam, oil mist, smog, volatile organic compounds (VOCs), granular pollutants, and the like. The method is characterized in that to-be-processed air flow is introduced into a demisting tower, at the same time, a solid material with a certain temperature is added into the demisting tower, the smog in the air flow contacts with the solid material in the demisting tower and is captured and adsorbed by the surface of the solid material, after gas-solid separation, the air flow is purified, and the solid material can be reused after being desorbed and renewed. Theinvention also discloses a related device, which has the advantages of high removing rate, low operation cost, and simple operation, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a method and device for purifying smog in an airflow, which is mainly used for removing water vapor, oil mist, volatile organic compounds, smog, particle pollutants and other substances in the airflow, and belongs to the technical field of air pollution control and environmental protection. Background technique [0002] The water vapor, oil mist, volatile organic compounds, smoke and particle pollutants in the airflow are mainly produced in the waste gas flow discharged from various production processes such as metal pickling, food processing, coating, textile and fuel combustion. Many waste gases are At a certain temperature, it is difficult to have an effective and simple treatment method for these pollutants. For example, the exhaust gas of oil fume is generally collected by a smoke collection device, and then treated by electrostatic oil fume purification and water washing treatment devices, but the electrodes of the electro...

Claims

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Application Information

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IPC IPC(8): B01D46/00B01D46/30B01D46/32B01D46/38B01D41/02B01D53/04B01D53/08B01D53/12
CPCB01D41/02B01D46/0036B01D46/0039B01D46/005B01D46/30B01D46/32B01D46/38B01D53/0407B01D53/0446B01D53/08B01D53/12B01D2253/1122B01D2253/202B01D2253/10B01D2258/02B01D2257/708B01D2258/025B01D2258/0258B01D2258/0275B01D2258/0283B01D2259/40083
Inventor 黄立维黄华丽
Owner 黄华丽
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