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A purification device and purification method for multi-polluting gas in tunnels and parking spaces
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A technology of polluting gases and purification devices, which is applied in the field of air purification, can solve the problems of high purification cost and narrow application range of air purification devices, and achieve the effects of reducing removal rate, improving air quality and improving photocatalytic efficiency
Active Publication Date: 2018-01-23
ZHEJIANG UNIV
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Problems solved by technology
[0006] In order to solve the technical problems of narrow application range and high purification cost of the existing air purification device, the present invention provides a purification device and purification method for the multi-polluted gas in tunnels and parking lots
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Embodiment 1
[0072] Preparation of photocatalyst:
[0073] Step (1): Dissolve PdCl with water 2 Stir to dissolve and make into PdCl 2 Solution, add water and stir to dilute for about 10-30 minutes;
[0074] Step (2): to PdCl 2 Add titanium oxide powder into the solution, as Pd, control the mass ratio of Pd to titanium oxide to 0.0005:1, and stir for 0.5 to 3 hours;
[0075] Step (3): Add silicon carbide into the solution system of step (2), soak for about 0.5-10 minutes, take it out and dry it in the air; Step (4): place the dried material at a temperature of 30-100°C for Drying to prepare Pd-doped silicon carbide supported titanium dioxide (photocatalyst).
[0076] Preparation of Adsorbent Material:
[0077] Prepare a potassium permanganate solution with a concentration of 0.01%, and then add activated carbon (activated carbon is submerged in the potassium permanganate solution) to the potassium permanganate solution, soak for 0.5-10 minutes, filter and dry, and then store it at a te...
Embodiment 2
[0081] The difference with embodiment 1 is that the flue gas components are as follows: O 2 20%, NO 10ppm, SO 2 5ppm for CO, 200ppm for CO, 5ppm for HC, and nitrogen for the rest. The flue gas temperature is 25 degrees Celsius, the relative humidity is 70%, and the pressure is 1 atmosphere.
[0082] After the treatment was completed, the air quality at the air outlet was measured. According to the calculation, the removal efficiency of NO was 100%, and the removal efficiency of SO was 100%. 2 The removal efficiency reaches 100%, the CO removal efficiency reaches over 70%, and the HC removal efficiency reaches 90%.
Embodiment 3
[0084] Compared with Example 1, the difference is that in step (2), the mass ratio of Pd to titanium oxide is 0.001:1.
[0085] After the treatment is completed, the removal efficiency of NO reaches 100%, SO 2 The removal efficiency reaches 100%, the CO removal efficiency reaches over 90%, and the HC removal efficiency reaches 100%.
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Abstract
The invention discloses a purifying device for multi-pollutant gas in tunnel and parking lot space. The purifying device comprises a case with an air inlet and an air outlet. A draught fan, a photocatalysis region and an adsorption region are sequentially arranged in the case in the gas flow direction. The photocatalysis region is full of a photocatalyst, ultraviolet lamp tubes arranged in the gas flow direction are embedded into the photocatalust, and the adsorption region is full of adsorption materials. The invention further discloses a method for treating air through the purifying device and a preparation method of the photocatalyst and the adsorption materials, wherein the purifying device is filled with the photocatalyst and the adsorption materials. The removal rate of pollutants in air is increased through cooperation of the ultraviolet lamp tubes, the photocatalyst and the adsorption materials, air quality is improved, in addition, the doping content of noble metal is effectively reduced, and treatment cost is reduced.
Description
technical field [0001] The invention relates to the field of air purification, in particular to a purification device and a purification method for the highly polluted gas in tunnels and parking lots. Background technique [0002] With the rapid development of my country's economy, the number of urban motor vehicles continues to increase. Road traffic congestion and air pollution caused by motor vehicles have affected people's daily travel and health. The development of urban semi-enclosed spaces such as road tunnels and underground parking lots can partially alleviate problems such as traffic congestion. However, the natural ventilation of this type of space is limited, because the exhaust pollutants generated by the passing and parking of cars gather in the semi-enclosed space, resulting in a decline in air quality. Semi-enclosed spaces such as tunnels and parking lots have problems such as serious air pollution, low visibility and noise. There are many types of air poll...
Claims
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