Purification and exhaust method for road tunnel without air shaft
A technology for tunnels and roads, applied in the field of polluted air purification and discharge in road tunnels, can solve problems such as atmospheric environment and adverse effects on landscape, and achieve the effect of reducing pollution and solving the difficulty of site selection
Active Publication Date: 2013-01-02
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD +1
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Problems solved by technology
[0008] To sum up, the existing road tunnels still need to install exhaust shafts and exhaust towers to remove the polluted air in the tunnel under the condition that the environment does not allow the road tunnel entrance to directly discharge polluted air, which is detrimental to the atmospheric environment and landscape influences
Therefore, there is an urgent need to develop a method for purifying and exhausting air in road tunnels without exhaust shafts and exhaust towers, which can overcome the shortcomings of existing tunnels with exhaust shafts, exhaust towers and tunnels that directly discharge polluted air.
Method used
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Embodiment 1
[0042] When the following formula is met, the road tunnel polluted air is introduced into the tunnel polluted air purification device 3 connected to the air duct 2 through the air guide channel 2 connected with the road tunnel 1 for purification treatment, and then, through the air guide channel 2 connected with the tunnel pollution air The exhaust fan 4 connected to the air purification device 3, the exhaust duct 5 connected with the exhaust fan 4, and the tunnel opening 6 connected with the exhaust duct 5 and having the function of discharging polluted air are discharged into the atmosphere:
[0043] 2+C li -r(1+η i )≤C i
[0044] Wherein, the purification efficiency η of the purification device 3 of the road tunnel is 90% for particulate matter PM, 90% for NO X 80%, CO 85%, total HC 62%, SO 2 95%. The permissible discharge ratio Ci at the entrance of each pollutant i is 0.5, the draft ratio r is 0.95, and the discharge ratio C at the outlet section is l is 0.03.
[0...
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The invention discloses a purification and exhaust method for a road tunnel without air shaft. The method comprises the following steps: introducing the polluted air into a tunnel polluted air purification device connected with an air induction channel through the air induction channel to purify the air; and exhausting the air out of the road tunnel through an exhaust fan connected with the tunnel polluted air purification device, an exhaust duct communicated with the exhaust fan and a tunnel portal communicated with the exhaust duct and having a function of exhausting the polluted air. According to the invention, the shortcomings of the scheme of arranging an air shaft and an exhaust tower and the scheme of directly exhausting the polluted air through the portal are overcome, the difficulty in selecting sites of the air shaft and exhaust tower of the road tunnel and adverse influence on the landscape are thoroughly prevented, and pollution of the tunnel to the atmospheric environmentis reduced to a great degree.
Description
technical field [0001] The invention relates to a tunnel air discharge method, in particular to a method for purifying and discharging polluted air in a road tunnel. Background technique [0002] With the development of economy, urban traffic contradictions are becoming more and more prominent, and the demand for inter-city traffic is increasing. Road tunnels have become a favorable means to solve traffic contradictions and an important part of transportation facilities. However, since the tunnels are fully enclosed structures, the air in the tunnels contains dust particles (PM), carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NO X ) and other major pollutants. The particulate matter PM in the tunnel air can cause chromosomal aberrations in blood lymphocytes; because CO combines with human hemoglobin, it directly reduces the amount of oxygen in the blood, causing headaches, drowsiness, and a sense of loss of balance. When the concentration is too high, it will ...
Claims
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IPC IPC(8): B01D53/86B01D53/72B01D53/62B01D53/60E21F1/00E21D9/14
Inventor 余斌黄丽君叶国强丁毅谢波王静唐晓兰肖炜黄亮亮
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD