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高浓度VOC废气处理设备选择应该注意哪些?

来源:http://www.yinyehuanbao.com     发布时间:2020-12-10   浏览次数:

一般来说,在选择废气处理设备之前,需要考虑四个因素:污染物类型、污染物浓度、废气体积和气流温度。由于风量小,所需焚烧炉小,投入的资金和运行费用自然少。因此,确定废气的类型,总结废气的产生和排放特点,并对整个过程进行分析是非常重要的。此外,小型废气焚烧炉可以减少氧化过程中的二次排放,即在转化过程中产生的一氧化碳、氮氧化物和二氧化碳副产物较少。
Generally speaking, four factors need to be considered before selecting waste gas treatment equipment: pollutant type, pollutant concentration, exhaust gas volume and air flow temperature. Due to small air volume and small incinerator, the investment and operation cost are naturally less. Therefore, it is very important to determine the type of exhaust gas, summarize the generation and emission characteristics of exhaust gas, and analyze the whole process. In addition, the small exhaust gas incinerator can reduce the secondary emissions in the oxidation process, that is, less carbon monoxide, nitrogen oxides and carbon dioxide by-products are produced in the conversion process.
一、直燃式废气焚烧炉
1、 Direct fired waste gas incinerator
直燃式废气焚烧炉在密闭燃烧室内采用高温催化作用,加速有机废气的氧化分解。一般来说,当温度超过1400℃时,大部分有机污染物会转化为二氧化碳和水,转化率一般能达到98%以上,基本符合有关部门的规定。直接燃烧焚烧炉通常是一个钢箱,燃烧室内有自己的燃料来源,主要是燃气燃烧器。通过某种方式,废热可以循环利用。
The direct fired waste gas incinerator uses high temperature catalysis in the closed combustion chamber to accelerate the oxidation and decomposition of organic waste gas. Generally speaking, when the temperature exceeds 1400 ℃, most of the organic pollutants will be converted into carbon dioxide and water, and the conversion rate can reach more than 98%, basically in line with the provisions of relevant departments. Direct combustion incinerator is usually a steel box, and the combustion chamber has its own fuel source, mainly gas burner. In some way, waste heat can be recycled.
二、蓄热式焚烧炉(RTO)
2、 Regenerative incinerator (RTO)
无论是在预热阶段还是在燃烧过程中,RTO都能大限度地回收热量,降低辅助燃料消耗。该装置的特点是使用多个热交换介质床。换热介质为蓄热陶瓷。燃烧室中VOCs氧化分解释放的热量用于加热陶瓷块。生产线废气在两层床之间转化,实现热回收(高达97%)
RTO can recover heat to a great extent and reduce the consumption of auxiliary fuel both in the preheating stage and in the combustion process. The device is characterized by the use of multiple heat exchange medium beds. The heat exchange medium is heat storage ceramic. The heat released by the oxidation and decomposition of VOCs in the combustion chamber is used to heat the ceramic block. The waste gas of the production line is converted between the two beds to realize heat recovery (up to 97%)
VOC治理设备
蓄热式焚烧炉适用于多种高浓度、大风量有机废气处理,包括卤素等,可成批或连续操作,VOCs去除率可达99%以上。缺点是RTO装置通常又大又重,尽管当前设备实用可靠,但与其他类型的焚烧炉相比,RTO的运动机件更多。
The regenerative incinerator is suitable for the treatment of organic waste gas with high concentration and large air volume, including halogen, etc. it can be operated in batches or continuously, and the VOCs removal rate can reach more than 99%. The disadvantage is that RTO devices are usually large and heavy. Although the current equipment is practical and reliable, RTO has more moving parts than other types of incinerators.
三、催化燃烧设备
3、 Catalytic combustion equipment
催化燃烧设备是:利用催化触媒的作用,把有机分子在相对较低的温度下(250℃-300℃)分解成CO2和H2O。 优点是:净化比较好,无二次污染,在分解过程产生的热量可以代替维持催化所需的能量,而且能回收利用,比较节能。 缺点是:较适合2000mg/m3—20000 mg/m3中高浓度废气的治理。低浓度≤600 mg/m3废气就需要耗费大量的能耗,净化效率也会降低
Catalytic combustion equipment is: the use of catalytic catalyst, organic molecules at a relatively low temperature (250 ℃ - 300 ℃) into CO2 and H2O. The advantages are: the purification is better, no secondary pollution, the heat generated in the decomposition process can replace the energy needed to maintain the catalysis, and can be recycled and more energy-saving. The disadvantages are: it is more suitable for the treatment of medium and high concentration waste gas from 2000mg / m3 to 20000 mg / m3. If the concentration is less than or equal to 600 mg / m3, a lot of energy consumption will be consumed, and the purification efficiency will be reduced

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