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Method for clearing harmful gas and dust in long tunnel

A harmful gas and dust technology, applied in the field of traffic engineering, can solve the problems of long ventilation time, high equipment damage rate, large pressure loss, etc., to improve air quality, speed up construction progress, and shorten ventilation time.

Inactive Publication Date: 2012-06-20
谢飞鸿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for directly degrading and adsorbing harmful gas and dust from a long tunnel, so as to overcome the large pressure loss, long ventilation time, low efficiency and high equipment damage rate of the existing ventilation method. Disadvantages of high cost

Method used

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  • Method for clearing harmful gas and dust in long tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The harmful gases CO, CO 2 , NO, NO 2 , sulfide, and dust are sent to the degradation pool by the fan. Using centrifugal fan, pressure 8kPa, air volume 2300m 3 / h, the harmful gases CO and CO inhaled in the tunnel 2 , NO, NO 2 , sulfide, and dust are sent to the degradation pool, and are reacted or cleaned with alkaline compounds in the degradation pool, preferably the alkaline compound sodium carbonate, and CO, a small amount of NO, and water vapor that are difficult to react with alkaline compounds are filtered through a porous fiber separation membrane After steam. The CO and a small amount of NO filtered from the porous fiber separation membrane, with a pressure of 8kPa, enter the low-temperature pressure swing adsorption tower with a temperature of 10-30°C for adsorption. CO and a small amount of NO are adsorbed in the adsorption tower, and then transported out of the pressure swing adsorption tower Tunnel, the adsorption tower is heated to 80-135°C, preferabl...

Embodiment 2

[0026] The harmful gases CO, CO 2 , NO, NO 2 , sulfide, and dust are sent to the degradation pool by the fan. Using centrifugal fan, the air volume is 2700m 3 / h, the harmful gases CO and CO inhaled in the tunnel 2 , NO, NO 2 , sulfide, and dust are sent to the degradation pool, and are reacted or cleaned with alkaline compounds in the degradation pool, preferably the alkaline compound sodium carbonate, and CO, a small amount of NO, and water vapor that are difficult to react with alkaline compounds are filtered through a porous fiber separation membrane After steam. The CO and a small amount of NO filtered from the porous fiber separation membrane, with a pressure of 6kPa, enter the low-temperature pressure swing adsorption tower with a temperature of 10-30°C for adsorption. CO and a small amount of NO are adsorbed in the adsorption tower, and then transported out of the pressure swing adsorption tower Tunnel, the adsorption tower is heated to 80-135°C, preferably 120°C,...

Embodiment 3

[0028] The harmful gases CO, CO 2 , NO, NO 2 , sulfide, and dust are sent to the degradation pool by the fan. Using centrifugal fan, pressure 4kPa, 2900m 3 / h, the harmful gases CO and CO inhaled in the tunnel 2 , NO, NO 2 , sulfide, and dust are sent to the degradation pool, and are reacted or cleaned with alkaline compounds in the degradation pool, preferably the alkaline compound sodium carbonate, and CO, a small amount of NO, and water vapor that are difficult to react with alkaline compounds are filtered through a porous fiber separation membrane After steam. The CO and a small amount of NO filtered from the porous fiber separation membrane, with a pressure of 4kPa, enter the low-temperature pressure swing adsorption tower with a temperature of 10-30°C for adsorption. CO and a small amount of NO are adsorbed in the adsorption tower, and then transported out of the pressure swing adsorption tower Tunnel, the adsorption tower is heated to 80-135°C, preferably 120°C, th...

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Abstract

The invention relates to a method for clearing harmful gas and dust in a long tunnel, aiming at solving a problem of difficulty in ventilation of the whole tunnel during a construction period of the long tunnel. The method for clearing harmful gas and dust in the long tunnel orderly comprises the following steps of: carrying and transporting a ventilator by a movable carrier, and transmitting harmful gases of CO, CO2, NO, NO2, sulfide and dust to a degradation pool by a fan; degrading the harmful gases of CO2, NO, NO2, sulfide and dust through reaction of alkali compounds in the degradation pool, and filtering steam by a porous fiber separation membrane; absorbing CO and a little NO through a low-temperature pressure swing absorption tower after degradation and membrane filtration; carrying the pressure swing absorption tower which absorbs CO and NO out of the funnel, and heating to 80-135 DEG C by an electric heating strip in the absorption tower so as to remove CO and NO. The method has the advantages of short conveyance distance of the harmful gases, short ventilation time, high ventilation efficiency, low using cost and the like, can effectively clear pollution of the harmful gases in the whole funnel, and is suitable for clearing the harmful gases and dust in a driving face of the long funnel.

Description

technical field [0001] The invention relates to the degradation and adsorption of harmful gas in a single-headed long tunnel constructed by blasting excavation, and belongs to the field of traffic engineering. Background technique [0002] The content of toxic gas in the blasting smoke produced by explosives during excavation of tunnels, hydraulic tunnels, and mine roadways is an important indicator for evaluating its safety level. The explosive products of toxic gases are mainly CO, CO 2 , NOx, sulfide, dust. The affinity between carbon monoxide and heme in red blood cells is 250-300 times greater than that of oxygen. After it is inhaled into the human body, it hinders the normal combination of oxygen and heme, causing hypoxia in various tissues and cells of the human body, causing poisoning and even death. NOx is easily soluble in water. When inhaled into human lungs, it will cause corrosion on the surface mucosa of the lungs and is highly irritating. Higher concentratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F1/00E21F5/00B01D53/78B01D53/047B01D53/62B01D53/60
CPCY02A50/20
Inventor 谢飞鸿
Owner 谢飞鸿
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