An auxiliary ventilation device for dust and smoke removal in tunnel construction

Abstract

The invention discloses a dedusting smoke-removing assistant ventilating device for tunnel construction. One side of the inlet of a dedusting box (7) is connected with a dust hood (1), and the other side of the dedusting box is connected with the inlet of a drawing-type ventilator (14). A smoke-removing box (16) is installed at the tail part of the device, and connected with the outlet of the drawing-type ventilator. The foul air generated in the tunneling process is pumped into the dedusting box through the dust hood so as to execute the dust filtration, and the air is pumped into the smoke-removing box so as to execute the fume treatment, finally the purified air is discharged from the outlet of the drawing-type ventilator. The smoke-removing box is capable of conveying sodium hydroxide solution in a liquid inlet box to a spray pipeline (9) through a water pump (20) and spraying by an atomizer (12), sprayed alkaline solution mist executes the neutral reaction with the acid gas in the fume, so that the purification treatment of the fume is realized. The dedusting smoke-removing assistant ventilating device for the tunnel construction is capable of integrating the dust filtration, the fume treatment and the assistant ventilation, realizing the efficient purification of the foul air, and improving the ventilation condition in the tunnel.

Description

technical field [0001] The invention relates to a tunnel dust removal and smoke removal ventilation device, in particular to an auxiliary ventilation device for tunnel construction dust removal and smoke removal, belonging to the technical field of tunnel dust removal. Background technique [0002] In the current tunnel construction, the trackless transport drilling and blasting method has become the main method of tunnel construction because of its flexible, fast and efficient characteristics. However, the trackless transport drilling and blasting method will produce a large amount of free silica in tunnel construction. Dust and gun smoke, and the exhaust gas produced by various construction machinery and equipment also enter the air. Since the tunnel is a relatively closed space, when the concentration of dust and harmful gases in the tunnel is too high, it will have an adverse effect on the safety and health of construction personnel and cause great harm to the environmen...

AI Technical Summary

Problems solved by technology

However, the dust removal efficiency of wet dust removal is not high, and the water mist affects the line of sight, and the discharged sewage affects the construction and slag removal transportation; while the electrostatic dust removal has ultra-high voltage static electricity, and it is dangerous to use in a humid tunnel construction environment, and it occupies an area. The area is relatively large; the pulse-jet bag type dust removal generally uses a bag-type filter bag as the filter element, and the filter bag is easily damaged during the dust cleaning process. When dealing with the same air volume, the volume of the filter bag is 2-3 times that of the filter cartridge. In addition, In the past, in the design of dust removal and ventilation equipment for tunnels, the treatment of flue gas was rarely considered, resulting in the permeation of flue gas in the tunnel construction environment, which greatly affected construction safety and personnel health

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