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Device and method for removing fine particles in gas in supergravity manner

A technology for removing gas and fine particles, which is applied in chemical instruments and methods, combined devices, separation methods, etc., can solve the problems of low removal rate of fine particles, inability to operate continuously, and short residence time, etc., to extend the residence time, Effects of avoiding boundary layer separation and improving classification efficiency

Active Publication Date: 2016-06-08
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that the residence time of gas in the rotating packing bed in the existing supergravity dust removal method is too short, and it is emptied before it is captured by liquid droplets; although the total dust removal efficiency of the rotating packing bed is high, the removal rate of fine particles is still Low; need more than 1000r / min speed to achieve high dust removal efficiency, high energy consumption, unstable; when dealing with high-concentration dust-containing gas, it is easy to cause stuffing blockage and cannot run continuously. Device and method for removing fine particles from gas

Method used

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  • Device and method for removing fine particles in gas in supergravity manner
  • Device and method for removing fine particles in gas in supergravity manner
  • Device and method for removing fine particles in gas in supergravity manner

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1: The dust concentration of blast furnace tail gas in a steelworks is about 10g / m 3 , using this as the dusty gas to carry out the pilot test, the treatment gas volume is 500m 3 / h, gas velocity is 10m / s, suitable liquid volume is 0.3m 3 / h, the outer diameter of the plastic Pall ring packing in the supergravity rotating packed bed is 16mm, the rotating speed of the supergravity rotating packed bed is 600r / min, and the liquid-gas ratio in the supergravity rotating packed bed is 0.2L / m 3 , the gas phase pressure drop of the high-gravity rotating packed bed is 150Pa, sodium lauryl sulfate is added to the water to prepare a foaming agent solution with a mass concentration of 0.05%, and the measured total dust removal efficiency is 98.7%. Among them, PM 2.5 The removal rate is 96%, PM 1.0 The removal rate is 89%.

Embodiment 2

[0025] Example 2: In a production line producing nitrophosphate fertilizer, 200,000 m3 will be discharged 3 / h of gas containing compound fertilizer dust, the dust particles are fine, the concentration is about 4g / m 3 . Use this as the dusty gas to carry out the pilot test, the treatment gas volume is 800m 3 / h, gas velocity is 15m / s, suitable liquid volume is 0.3m 3 / h, the outer diameter of the plastic Pall ring packing in the supergravity rotating packed bed is 35mm, the rotating speed of the supergravity rotating packed bed is 500r / min, and the liquid-gas ratio in the supergravity rotating packed bed is 0.3L / m 3 , the gas phase pressure drop of the high-gravity rotating packed bed is 180Pa, adding span series of surfactants in water to prepare a foaming agent solution with a mass concentration of 0.01%, the measured total dust removal efficiency is 99.5%, of which, PM 2.5 The removal rate is 97%, PM 1.0 The removal rate is 88.5%.

Embodiment 3

[0026] Embodiment 3: using 2000 mesh talcum powder simulation concentration is 15g / m 3 of dusty gas, the treatment gas volume is 600m 3 / h, the gas velocity into the supergravity rotating packed bed is 20m / s, and the suitable liquid volume is 0.15m 3 / h, the outer diameter of the plastic Pall ring packing in the supergravity rotating packed bed is 50mm, the speed of the supergravity rotating packed bed is 400r / min, and the liquid-gas ratio in the supergravity rotating packed bed is 0.4L / m 3 , the gas-phase pressure drop of the high-gravity rotating packed bed is 200Pa, adding tween series wetting agents in water to prepare a foaming agent solution with a mass concentration of 0.1%, and the measured total dust removal efficiency is 99.7%. Among them, PM 2.5 The removal rate is 98%, PM 1.0 The removal rate is 90%.

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Abstract

The invention belongs to the technical field of supergravity dedusting, aims at solving the problem that existing supergravity dedusting methods are low in fine particle removing rate, high and unstable in energy consumption, prone to causing packing blockage when being used for treating high-concentration dust-containing gas and incapable of realizing continuous running and provides a device and a method for removing fine particles in gas in a supergravity manner. A gas inlet of a supergravity rotating packing bed is connected with a dust-containing gas source through a vortex shedding flowmeter, a liquid inlet is connected with a liquid storage tank through a liquid pump, a liquid outlet is connected with the liquid storage tank through a U-shaped liquid sealing device, the gas inlet is tangentially arranged outside a shell of the supergravity rotating packing bed, a square diversion inlet plate is mounted at the gas inlet, a packing layer is arranged in the supergravity rotating packing bed, and packing is plastic Pall ring packing. Total dedusting efficiency is up to 99.6%, grading efficiency is remarkably improved, and the device and the method are more suitable for removing the fine particles in the gas. The device is lower in economic cost, more stable in running, low in energy consumption, suitable for industrial application, free of blockage, supportive of continuous running, light in weight and convenient to transport.

Description

technical field [0001] The invention belongs to the technical field of supergravity dust removal, and in particular relates to a device and method for removing fine particles in gas by supergravity. Background technique [0002] Fine particulate matter (also known as PM 2.5 ) refers to dust with an aerodynamic diameter of less than 2.5 μm, which has a large specific surface area and can absorb various toxic and harmful substances and deposit them in the lungs of the human body, causing cardiovascular and cerebrovascular diseases and lung cancer, seriously endangering human health. The chief culprit of the "smog" phenomenon. The industrial waste gas discharged from fixed pollution sources such as coal-fired power generation, chemical industry, smelting, and petroleum processing contains a large amount of fine particles, which are difficult to be removed by conventional dust collectors and become the main source of fine particles. [0003] The high-gravity rotating packed be...

Claims

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Application Information

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IPC IPC(8): B01D50/00B01D47/14
CPCB01D47/14B01D50/40
Inventor 刘有智祁贵生焦纬洲张巧玲罗莹袁志国申红艳高璟栗秀萍郭强
Owner ZHONGBEI UNIV
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