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1980年米原(Ma ibara〉和敦贺(Tsuruga)之间的北陆(Hokuriku)高速公路开通,敦贺隧道B线(2925米)与A线联合投入运营。如果敦贺隧道与1977年开通的A线(3175米)平行,B线就有2个单向车道通往富山(Toyama)。本隧道采用静电除尘器的纵向式通风。这种类型静电除尘器的使用在世界上还是第一次。当交通量为1,689辆/小时时,通风量为580米~3/秒。但由于在隧道内利用静电除尘器对空气进行处理(280米~3/秒),通风量可降到389米~3/秒。风速为7米/秒时,静电除尘器的效率可达80%以上。集尘站设在距隧道口1,678米处,内有静电除尘风机的双风道系统、动力分配设备、控制装置和集尘器的辅助机器。集尘器处理气体流量为120米~3/秒,风机能量140米~3/秒,风机直径2.8米,输出功率215千瓦。通风条件包括能见度和CO。静电除尘器和可变角风机按能见度和CO仪表的测值自动运转。允许值是每100米光的传输(能见度)最小为40%;CO最大浓度为100PPm。这种使用静电除尘器的纵向式通风系统现已计划在日本很多长公路隧道使用,如关越隧道(10.8公里)和惠那山隧道(8.5公里)等。
The opening of the Hokuriku Expressway between Maibara and Tsuruga in 1980 led to the joint operation of Tunnel B (2,925 m) of Tunnel He and Tunnel A. With the opening of the Tunnel of Hegai in 1977 Parallel to line A (3175 m), there are 2 one-way lanes to Toyama on line B. This tunnel uses longitudinal ventilation of electrostatic precipitators. This is the first time this type of electrostatic precipitator has been used in the world When the traffic volume is 1,689 vehicles / hour, the ventilation rate is 580m ~ 3 / s, but the air volume can be reduced to 389m by using the electrostatic precipitator in the tunnel (280m ~ 3 / s) ~ 3 / s. When the wind speed is 7m / s, the efficiency of electrostatic precipitator can reach above 80%. The dust collecting station is located at 1,678m away from the tunnel entrance, with double duct system of electrostatic precipitator fan, power distribution equipment , Control device and auxiliary equipment for the dust collector. The dust collector handles the gas flow rate of 120 m ~ 3 / s, the fan energy of 140 m ~ 3 / s, the fan diameter of 2.8 m and the output power of 215 kW. Ventilation conditions include visibility and CO Electrostatic precipitators and variable angle fans operate automatically according to visibility and CO meter readings. Permissible values are per 100 meters of light The minimum 40% transmission (visibility) is 100PPm. The vertical ventilation system using electrostatic precipitators is now planned to be used in many long road tunnels in Japan such as the Guan-Yue Tunnel (10.8 km) and the Huina Shan Tunnel (8.5 km) and so on.