Air purifier for clearing away harmful gases and dust for long tunneling working surface

A harmful gas, tunneling technology, applied in the construction of traffic tunnels, the construction of mine shafts without gas gushing, and the field of traffic engineering, it can solve the problems of high equipment damage rate, long ventilation time, large pressure loss, etc., to speed up the construction. progress, shortening ventilation time, and improving air quality

Inactive Publication Date: 2012-05-02
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 an air purifier for removing harmful gases and dust in long tunnels, so as to overco

Method used

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  • Air purifier for clearing away harmful gases and dust for long tunneling working surface
  • Air purifier for clearing away harmful gases and dust for long tunneling working surface
  • Air purifier for clearing away harmful gases and dust for long tunneling working surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 5 to 15 minutes after the blasting of the tunnel excavation face, at a distance of 20 to 50 minutes from the excavation face, the harmful gases CO, CO 2 , NO, NO 2 , sulfide, and dust are sent into the degradation tank by the fan, the pressure is 40kPa, and the air volume is 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 enter the low-temperature pressure swing adsorption tower with a temperature of 10-30°C for adsorption. The electric heating belt heats the adsorption tower to 80-135°C, preferably 100°C to desorb C...

Embodiment 2

[0034] 5 to 15 minutes after the blasting of the tunnel excavation face, at a distance of 20 to 50 minutes from the excavation face, the harmful gases CO, CO 2 , NO, NO 2 , sulfide, and dust are sent to the degradation tank by the fan, the pressure is 30kPa, the pressure is 3kPa, and 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 3kPa, 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 a...

Embodiment 3

[0036] 5 to 15 minutes after the blasting of the tunnel excavation face, at a distance of 20 to 50 minutes from the excavation face, the harmful gases CO, CO 2 , NO, NO 2 , sulfide, and dust are sent to the degradation tank by the fan, the pressure is 40kPa, the pressure is 2kPa, and the temperature is 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 through the porous fiber separation membrane enter the low-temperature pressure swing adsorption tower with a temperature of 10-30°C for adsorption at a pressure of 2kPa. CO and a small amount of NO are adsorbed in the a...

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Abstract

The invention relates to an air purifier for clearing away harmful gases and dust for a long tunneling working surface, aiming at solving the problem that the ventilation for the tunneling working surface for construction of a long tunnel is difficult. A centrifugal fan is used to send harmful gases CO, CO2, NO, NO2, sulfides and dust in the tunnel into a degrading tool through a suction guard and a connecting pipe. The CO and NO, which are left after the reaction degradation, are sent into an absorption box through the connecting pipe, and the residual gases are filtered off water vapors by a porous fiber separating membrane, and the CO and a little of NO, which are left after the degradation and membrane filtration, are absorbed by a low-temperature pressure swing adsorption tower; the pressure swing absorption tower which absorbs the CO and NO is transported out of the tunnel, wherein the tower is heated to 80-135 DEG C by an electric heating tape in the tower to desorb the CO and NO. The air purifier can effectively prevent pollution to the tunneling working surface from harmful gases, and is suitable for clearing off harmful gases and dust.

Description

technical field [0001] The invention relates to the degradation and adsorption of harmful gas on the excavation face of a single-headed long tunnel constructed by blasting excavation, and belongs to the field of traffic engineering. It is especially suitable for the field of traffic tunnel construction, and also suitable for the construction field of mine shafts without gas gushing. 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...

Claims

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Application Information

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IPC IPC(8): E21F1/00E21F5/02B01D53/74B01D53/60B01D53/62B01D53/047B01J20/34
CPCY02A50/20
Inventor 谢飞鸿
Owner 谢飞鸿
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