铸造厂废气处理工程除臭设备工艺

铸造废气除臭设备工艺说明

Process description of deodorizing equipment for foundry waste gas

覆膜砂铸造过程为：融化-造型-下芯-浇注-后处理等工序，其中在浇注时产生***量水汽及树脂，乌洛托品，硬脂酸钙，煤粉，淀粉，孕育剂（锡）金属合金，在高温1400℃-1500℃下发生化学反应分解的氨气，乙酸酯，硫化氢，无量纲等挥发性臭味。

The casting process of coated sand is melting-moulding-core-setting-pouring-post-treatment process, in which a large amount of water vapor and resin, urotropine, calcium stearate, coal powder, starch, inoculant (tin) metal alloy are produced during pouring, and ammonia, acetate, hydrogen sulfide and dimensionless volatile odor are decomposed by chemical reaction at high temperature of 1400-1500 C.

铸造厂废气处理工程除臭设备工艺

Deodorization Equipment Technology for Waste Gas Treatment Project in Foundry

铸造废气通过引风机抽出，由引尘罩管道进入除尘器设备再进入光催化除臭设备内，在高能紫外线照射下，使挥发性有机物（VOCs）化学键开环和断裂等多种反应（光化学反应），降解转变成CO2，H2O等低分子化合物；

Foundry exhaust gas is pumped out by induced draft fan, and then enters into the deodorizer and photocatalytic deodorizer through the dust cover pipeline. Under high-energy ultraviolet irradiation, the chemical bonds of volatile organic compounds (VOCs) are opened and broken, and many other reactions (photochemistry reactions) are degraded into low molecular compounds such as CO 2 and H 2.

一方面利用高能紫外光照射空气中的氧气生成臭氧，臭氧吸收紫外线生成氧自由基和氧气，氧自由基与空气中的水蒸气作用生成羟基自由基，一种更强的氧化剂，与醇、醛、羧酸等有机废气，彻底氧化为水、二氧化碳等无机物。

On the one hand, high-energy ultraviolet light irradiates oxygen in the air to produce ozone, ozone absorbs ultraviolet light to produce oxygen free radicals and oxygen, oxygen free radicals react with water vapor in the air to produce hydroxyl radicals, a stronger oxidant, with organic waste gases such as alcohols, aldehydes, carboxylic acids, and thoroughly oxidize to water, carbon dioxide and other inorganic substances.

另外，未吸收紫外线的臭氧也是一种强氧化剂，与一些有机废物接触后将其氧化生成水、二氧化碳等无机物。

In addition, ozone, which does not absorb ultraviolet rays, is also a strong oxidant, which oxidizes some organic wastes to water, carbon dioxide and other inorganic substances after contacting with them.

铸造废气排放达标执行标准

Execution Standard of Casting Exhaust Gas Emission

排放达标标准：执行《***气污染物综合排放标准》(GB16297-1996)二级标准和《恶臭污染物排放标准》(GB14554-93)二级标准.臭气浓度低于：无量纲2000。

Emission standards: Implement the second-level standards of "Comprehensive Emission Standard of Air Pollutants" (GB16297-1996) and "Odor Pollutants Emission Standard" (GB14554-93). Odor concentration is lower than: dimensionless 2000.