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Denitration system for flue gas denitrification by utilizing ozone and spray tower
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A spray tower and ozone technology, applied in the field of denitrification system, can solve the problems of easy decomposition of ozone and low oxidation effect
Pending Publication Date: 2021-08-24
SHANDONG NORMAL UNIV
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[0003] In order to solve the technical problem that ozone is easy to decompose in flue gas and has low oxidation effect, the present invention provides a denitrification system that uses ozone and a spray tower to denitrify flue gas, the content of which is as follows:
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Embodiment 1
[0072] combined with figure 1 , attached Figure 5 , the present invention is described:
[0073] The spray tower is a cylinder with a diameter of 0.8m, a tower height of 5m, and a wall thickness of 8mm, made of 304L stainless steel. A sprinkler 1 is installed at a position 1 meter away from the top of the tower, and the sprinkler 1 is composed of three 90° conical solid nozzles 2, which are evenly arranged in a cross section. The sprayer 1 is connected to the liquid inlet pipe 4 of the soluble lye; the ozone distributor 5 is located 0.8m below the sprayer 1, and the ozone distributor 5 is a flat spiral tube, and the lower part of the tube is evenly facing the direction of the flue gas There are several small holes of 1mm. The ozone distributor 5 is connected to the inlet pipe 6 of ozone. At a position 1.5m away from the bottom, the spray tower is provided with a flue gas inlet 7, and a flue gas outlet 8 is set at the top. The bottom of spray tower is used as lye tank 9. ...
Embodiment 2
[0079] combined with figure 2 , attached Figure 5 , the present invention is described:
[0080] The structure difference between this embodiment and the denitrification system described in Embodiment 1 is that: the ozone distributor 5 is located at a position of 2 meters below the shower 1; and the small hole of the ozone distributor 5 faces upward; the ozone passes through the ozone distributor The small hole of 5 ejects upwards, consistent with the flue gas flow. Other content and process are the same as embodiment 1.
[0081] Measured at the flue gas outlet 8 of the spray tower, the NO content is 43, 47, 48, 49 mg / m 3 Equal values, ranging from 40-50mg / m 3 between.
Embodiment 3
[0083] combined with image 3 , attached Figure 5 , the present invention is described:
[0084]The structure difference between this embodiment and the denitrification system described in Embodiment 1 is that: a shower 1-b is set at a position 0.5 meters above the shower 1; the shower 1-b is connected to the liquid inlet pipe 4-b, connect booster pump 12-b, flow regulating valve 13-b, and finally connect to lye tank 9. That is, the system has two sets of soluble lye supply systems. Other content and process are the same as embodiment 1.
[0085] Measured at the flue gas outlet 8 of the spray tower, the NO content is 57, 54, 44, 48 mg / m 3 Equivalent values, ranging from 45-60mg / m 3 between.
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Abstract
The invention discloses a denitration system utilizing ozone and a spray tower for flue gas denitration, which comprises the spray tower, an ozone supply system and a soluble alkali liquor supply system; a sprayer is arranged in the spray tower, and the soluble alkali liquor supply system conveys soluble alkali liquor to the sprayer through a liquor inlet pipe; an ozonedistributor is further arranged in the spray tower, wherein the ozone distributor is arranged at the lower part of the sprayer and the upper part of the flue gas inlet; and the ozone supply system conveys ozone to the ozone distributor through a gas inlet pipe. The method overcomes the technical prejudice, and has unexpected technical effects, huge economic benefits and social benefits.
Description
technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to a denitrification system for flue gasdenitrification by using ozone and a spray tower. Background technique [0002] Coal-fired power generation, steelmaking in steel mills, and other processes that use coal and petroleum as heat sources are one of the main sources of increased nitrogen oxides in the environment. In order to reduce the impact on the environment, various manufacturers have adopted many methods to reduce the emission of nitrogen oxides in the combustiontail gas ("flue gas" mentioned in the present invention), that is, to perform denitrification treatment on the flue gas. There are two main types of existing flue gas denitrification technologies, one is the catalytic reduction method, and the other is the oxidation method. Compared with the catalytic reduction method, the oxidation method has the advantages of simple process and low cost in theor...
Claims
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