A kind of gas cleaning desulphurization system
Technical field
The utility model relates to a kind of gas cleaning desulphurization system.
Background technology
Since early 1980s, along with China's economy continues to develop rapidly, coal year, consumption was with 5~12% speed cumulative year after year, SO
2Annual emissions also increase year by year.To 20 end of the centurys, China SO
2Annual emissions up to more than 2,000 ten thousand t, China becomes the most serious country of air environmental pollution in the world, at SO
2Contamination under also become the third-largest acid rain district in the world.In 113 national prevention and control of air pollution key cities in 2002,40 city SO are arranged
2Year, average daily concentration surpassed national grade ii standard, accounted for 35.4%, and the city that particle exceeds standard accounts for 72.6%.30 urban air-qualities are up to standard, and 44 urban air-qualities are three grades, and 39 urban air-qualities are inferior to three grades.Because coal fire discharged SO
2Belonging to does not have the control discharging, and China's acid rain pollutes and also is difficult to control, and China's acid rain contaminated area accounts for more than 1/3rd of territory total area basically.China's atmosphere pollution is so serious, and becoming does not have only country to the greatest extent in the world today.Future, economic sustainable development rapidly, SO
2Discharge capacity also can increase year by year, air environmental pollution control allows of no optimist.
The utility model content
Main purpose of the present utility model is to provide a kind of can improve the flue gas quality, reduces the gas cleaning desulphurization system of environmental pollution.
For addressing the above problem, the utility model adopts following technical scheme: a kind of gas cleaning desulphurization system, comprise gas approach system, desulfurization reaction tower, cloth bag dust removal by filtration reaction system, heat exchanger, flue gas heater, SCR denitration reaction system and booster fan, described gas approach system, desulfurization reaction tower, cloth bag dust removal by filtration reaction system, heat exchanger, flue gas heater, SCR denitration reaction system are connected successively with booster fan, described booster fan links to each other with heat exchanger, and described heat exchanger also is connected with former cigarette fontanel.
Further, described SCR denitration reaction system is connected with liquefied ammonia and stores preparation system.
Further, described desulfurization reaction tower is connected with material circulation and residue treating apparatus and NaHCO
3Store preparation system.
The beneficial effect of the utility model gas cleaning desulphurization system is: be applicable to hydrogen sulfide and the impurity removed in various combustion gas, the coal gas, improve air quality, reduce environmental pollution.
Description of drawings
Fig. 1 is the front view of the utility model gas cleaning desulphurization system.
The specific embodiment
See also shown in Figure 1, a kind of gas cleaning desulphurization system of the present utility model, comprise gas approach system, desulfurization reaction tower, cloth bag dust removal by filtration reaction system, heat exchanger, flue gas heater, SCR denitration reaction system and booster fan, described gas approach system, desulfurization reaction tower, cloth bag dust removal by filtration reaction system, heat exchanger, flue gas heater, SCR denitration reaction system are connected successively with booster fan, described booster fan links to each other with heat exchanger, and described heat exchanger also is connected with former cigarette fontanel.
Wherein, described SCR denitration reaction system is connected with liquefied ammonia and stores preparation system.Described desulfurization reaction tower is connected with material circulation and residue treating apparatus and NaHCO
3Store preparation system.
The beneficial effect of the utility model gas cleaning desulphurization system is: be applicable to the hydrogen sulfide and the impurity that remove in gas, the coal gas, improve air quality, reduce environmental pollution.
The above only is the specific embodiment of the present utility model, but protection domain of the present utility model is not limited thereto, and any variation or replacement of expecting without creative work all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claims were limited.