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煙氣脫硫脫硝處理的技術有哪些?

鍋爐燃燒柴油產生的廢氣越來越多,主要含有SO2.NOX.煙塵、林格曼黑度等污染物。如果這些污染物隨意排放到大氣中,將對當地生態環境產生相當惡劣的影響。為了保護我國生態環境的完整性,保護環境和經濟的可持續發展,鍋爐廢氣應脫硫。

There are more and more waste gas generated by boiler combustion of diesel, mainly including SO2. NOX. soot, Ringmann blackness and other pollutants. If these pollutants are discharged into the atmosphere at will, they will have a very bad impact on the local ecological environment. In order to protect the integrity of China's ecological environment and the sustainable development of the environment and economy, boiler exhaust gas should be desulfurized.
目前,煙氣脫硫脫硝處理技術多種多樣,包括PAFP.ACFP.軟錳礦法.電子束氨法.脈沖電暈法.石膏濕法.催化氧化法.微生物降解法等技術,其中濕法煙氣脫硫脫硝快、常見。
At present, flue gas desulfurization and denitration treatment technologies are diverse, including PAFP, ACFP, pyrolusite process, electron beam ammonia process, pulse corona process, gypsum wet process, catalytic oxidation process, microbial degradation process and other technologies, among which wet flue gas desulfurization and denitration are fast and common.
常見的煙氣脫硫方法包括干式脫硫和濕式脫硫。干式脫硫是利用催化劑和吸收劑去除煙氣中的二氧化硫。不同的催化劑和吸附劑也有不同的作用。更廣泛使用的吸收劑類型是氧化物和活性炭。雖然干式脫硫是有效的,但由于不能回收,吸收成本高。濕式脫硫和干式脫硫均采用高效液體吸收劑。石灰石和海水脫硫是濕式脫硫的主要操作方法。因此,我國絕大多數企業都使用濕式脫硫進行相關操作。
Common flue gas desulfurization methods include dry desulfurization and wet desulfurization. Dry desulfurization is to remove sulfur dioxide from flue gas by using catalyst and absorbent. Different catalysts and adsorbents also have different effects. The more widely used absorbent types are oxides and activated carbon. Although dry desulfurization is effective, it cannot be recovered and the absorption cost is high. High-efficiency liquid absorbent is used for wet desulfurization and dry desulfurization. Limestone and seawater desulfurization are the main operation methods of wet desulfurization. Therefore, most enterprises in China use wet desulfurization for relevant operations.
沼氣提純
濕法煙氣脫硫技術有很多優點:濕法煙氣脫硫技術是氣液反應,反應速度快,脫硫效率高,一般高于90%,技術成熟,應用廣泛。濕法脫硫技術相對成熟,生產運行安全可靠,在眾多脫硫技術中始終占據主導地位。
Wet flue gas desulfurization technology has many advantages: wet flue gas desulfurization technology is gas-liquid reaction, with fast reaction speed and high desulfurization efficiency, generally higher than 90%, mature technology and wide application. Wet desulfurization technology is relatively mature, safe and reliable in production and operation, and has always occupied a leading position in many desulfurization technologies.
煙氣處理后,將煙氣加熱到350~400攝氏度,然后進入選擇性催化還原反應器,是國外公司開發的濕洗脫硫脫硝技術的主要工藝,可將有害氮化物轉化為無害氮。
After flue gas treatment, the flue gas is heated to 350~400 ℃, and then enters the selective catalytic reduction reactor. It is the main process of wet cleaning desulfurization and denitrification technology developed by foreign companies, which can convert harmful nitrogen compounds into harmless nitrogen.
目前,空氣加熱器也是常用的煙氣加熱器。循環風道加熱器主要用于風道內的空氣加熱。循環風道加熱器的規格分為低溫、中溫和高溫。循環風道加熱器在結構上的共同點是,采用鋼板支撐循環風道加熱器,以減少風機停止時循環風道加熱器的振動。低溫型可直接安裝在循環風道加熱器上,而中溫型可直接安裝在循環風道加熱器上。由于高溫型結構不同,通道外壁至加熱器接線盒夾有保溫材料。一方面,它減少了整個循環風道加熱器通道的外部散熱,另一方面,它也降低了接線腔內的溫度。
At present, air heater is also a common flue gas heater. The circulating air duct heater is mainly used for air heating in the air duct. The specifications of the circulating air duct heater are divided into low temperature, medium temperature and high temperature. The common structural feature of the circulating air duct heater is that the steel plate is used to support the circulating air duct heater to reduce the vibration of the circulating air duct heater when the fan stops. The low temperature type can be directly installed on the circulating air duct heater, while the medium temperature type can be directly installed on the circulating air duct heater. Due to the different structure of high temperature type, thermal insulation materials are sandwiched between the outer wall of the channel and the heater junction box. On the one hand, it reduces the external heat dissipation of the whole circulating air duct heater channel, on the other hand, it also reduces the temperature in the wiring chamber.
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The above wonderful content is recommended for reading by biogas purification. If you want to know more useful knowledge, please click: http://www.477115.com 。

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