A method of flue gas purification
A flue gas purification and flue gas purification system technology, applied in the field of flue gas purification, can solve the problems of secondary pollution, corrosion, low plasma treatment efficiency, etc., and achieve the effect of saving cost and saving space and occupation.
Active Publication Date: 2020-11-13
JIANGSU CHUNSHENTANG PHARMA
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Problems solved by technology
[0007] However, the current flue gas treatment technologies more or less have the following problems: 1. Common problems such as severe corrosion, high operation and maintenance costs, and easy to cause secondary pollution; 2. Single desulfurization, single denitrification or heavy metal , the three cannot be eliminated very well, and one loses the other; 3. The efficiency of single treatment is high, and the efficiency of joint treatment is low; 4. The efficiency of plasma treatment is not high, and it is easily affected by other factors
Method used
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Embodiment
[0049] Sampling and analysis of flue gas from a certain factory shows that the basic properties of the flue gas are: NO x : 420~600mg / m 3 ;SO 2 : 1500~2100mg / m 3 ; Mercury: 90~180μg / m 3 ;Dust: 18000~30000 mg / m 3 .
[0050] like Figure 1-3 As shown, follow the steps below to treat the flue gas:
[0051] 1) Pretreatment: Use the washing solution in the pre-scrubber 1 to absorb and remove part of the dust particles, nitrogen oxides, and sulfur-containing pollutants in the flue gas; wherein, the absorption solution is an alkaline solution, and NaOH aqueous solution is selected;
[0052] The initial flue gas must contain a large number of dust particles, and the alkaline aqueous solution is used to wash out a large amount of dust particles, as well as some nitrogen oxides and sulfur-containing pollutants, which can reduce the pressure for subsequent operations at a very low cost, and at the same time Can indirectly improve the purification rate of subsequent steps;
[0053...
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The invention discloses a flue gas purification method which is used for removing nitrogen oxides, sulfurous pollutants, dust and heavy metals in flue gas. The flue gas purification method comprises: 1, preprocessing; 2, gas-liquid separation processing; 3, catalysis processing; 4, plasma processing; 5, chemical reaction processing; 6, electric field adsorption processing. The flue gas purification method disclosed by the invention aims to improve the defects of the prior art in the aspects of processing effect, processing efficiency, economy and the like, achieve an efficient, safe, convenient and rapid processing effect, reduce energy consumption and cost and flexible respond to different cases, and particularly can carry out Integrated, balanced and efficient removal on the nitrogen oxides, the sulfurous pollutants, the dust and the heavy metals.
Description
technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a flue gas purification method. Background technique [0002] In recent years, due to the increasingly severe situation of environmental protection work, the national and local pollutant discharge standards have become more stringent. The position of a large coal country makes the treatment of coal-fired flue gas particularly important in my country. The SO produced by coal-fired 2 , NO X It is the main substance of acid rain and photochemical smog, which brings serious harm to the ecological environment and the health of residents. The country has implemented SO in various stages of development. 2 Emission reduction strategies, more stringent SO 2 and NO X emission control standards, and not only SO 2 , NO X And the emission concentration limits of traditional pollutants such as dust will be further reduced. In the future, mercury and PM2.5 in flue gas w...
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IPC IPC(8): B01D53/86B01D53/88B01D53/56B01D53/48B01D53/76B01D50/00
CPCB01D50/00B01D53/14B01D53/1456B01D53/32B01D53/76B01D53/8603B01D53/8625B01D53/88B01D2257/602B01D2258/0283B01D2259/818Y02C20/10
Inventor 王守国卞忠华
Owner JIANGSU CHUNSHENTANG PHARMA