New deep purification process of organic waste gas, and applications of new deep purification process in treatment of industrial organic waste gas

Abstract

The invention discloses a new deep purification process of organic waste gas, and applications of the new deep purification process in treatment of industrial organic waste gas. According to the present invention, through the integrated innovation of an efficient liquid absorption method and a solid adsorption method, the efficient synergistic purification of particulate matters, VOCs and multiple pollutants is achieved; the concrete principle is that most of the VOCs in waste gas are subjected to absorption removal by using an efficient liquid absorbent through a like dissolves like principle and other principles while the vast majority of particulate matters are removed through washing, most of water is removed from the purified waste gas through a demister, the water removed waste gas enters an adsorption section, and the VOCs in the waste gas is subjected to adsorption removal so as to achieve the standard discharging; and with the previous section absorption process, the bonding and the clogging of the subsequent section adsorption equipment can be prevented, the production load can be reduced, the long-time efficient and stable running can be ensured, and the double efficient synergistic control of the multiple pollutants in the method and between the methods can be achieved; and the new deep purification process has advantages of high VOCs removal efficiency and flexible process selection, and is suitable for the treatment of industrial organic waste gas.

Description

technical field

[0001] The invention belongs to the technical field of air pollution control, and in particular relates to a new process for deep purification of organic waste gas and its application in the treatment of industrial organic waste gas. Background technique

[0002] In recent years, smog and haze have occurred frequently in the central and eastern parts of my country and the Pearl River Delta region, and PM2.5 has seriously exceeded the standard, and volatile organic compounds (VOCs) emitted by industrial production are one of the main causes. The processing and manufacturing industry in the Pearl River Delta region is well developed, with tens of thousands of VOCs emission sources such as electronics, plastics, metal products, furniture, chemicals, shoemaking, automobiles, and printing. Studies have shown that the contribution rate of VOCs emissions from industrial sources in the Pearl River Delta region is even greater. up to 50%. The Chinese government clear...

Examples

Embodiment 1

[0039] Organic waste gas in the spraying workshop of an aluminum profile factory, with an air volume of 5000m 3 / h, the exhaust gas temperature is 45°C, the main component is benzene, and the average concentration is 35mg / m 3 ;The average concentration of toluene is 125mg / m 3 ;The average concentration of xylene is 150mg / m 3;The average concentration of n-hexane is 100mg / m 3 ;The average concentration of n-heptane is 75mg / m 3 , the average particle concentration is 158mg / m 3 .

[0040] Process 1 was used to treat it. The composition of the absorption liquid and the purification effect of pollutants are shown in Table 1.

[0041] Table 1 Absorption liquid composition and pollutant purification effect in Example 1

[0042]

[0043] It can be seen from Table 1 that process 1 and its series of absorbing liquids described in Example 1 have a good removal effect on spraying organic waste gas.

Embodiment 2

[0045] A furniture factory emits organic waste gas with an air volume of 7000m 3 / h, the exhaust gas temperature is 40°C, the main component is butanone, and the average concentration is 30mg / m 3 ;The average concentration of benzene is 153mg / m 3 ;The average concentration of toluene is 50mg / m 3 ;The average concentration of xylene is 250mg / m 3 ; The average concentration of ethyl acetate is 130mg / m 3 , the average concentration of butyl acetate is 180mg / m 3 , the average particle concentration is 236mg / m 3 .

[0046] Process 2 was used to treat it. The composition of the absorption liquid and the purification effect of pollutants are shown in Table 2.

[0047] Table 2 Absorption liquid composition, adsorbent type and pollutant purification effect in Example 2

[0048] It can be seen from Table 2 that the process 2 and its series of absorbing solutions described in Example 2 all have good removal effects on furniture organic waste gas.

Embodiment 3

[0050] A circuit board factory discharges organic waste gas with an air volume of 10,000m 3 / h, the exhaust gas temperature is 40°C, the main component is toluene, and the average concentration is 85mg / m 3 ; The average concentration of butyl acetate is 74mg / m 3 ;The average concentration of xylene is 76mg / m 3 , the average concentration of particulate matter is 534mg / m 3 .

[0051] Process 1 and process 2 were used to treat them respectively. The composition of absorption liquid and adsorbent and the purification effect of pollutants are shown in Table 3.

[0052] Table 3 Absorption liquid composition, adsorbent type and pollutant purification effect in Example 2

[0053]

[0054] It can be seen from Table 3 that the process 1 and its series of absorbing liquids described in Example 3 have a good removal effect on the organic waste gas of the circuit board factory, and the process 2 is adopted on the basis of process 1, and the removal rate of each pollutant is further...

technical field

[0001] The invention belongs to the technical field of air pollution control, and in particular relates to a new process for deep purification of organic waste gas and its application in the treatment of industrial organic waste gas. Background technique

[0002] In recent years, smog and haze have occurred frequently in the central and eastern parts of my country and the Pearl River Delta region, and PM2.5 has seriously exceeded the standard, and volatile organic compounds (VOCs) emitted by industrial production are one of the main causes. The processing and manufacturing industry in the Pearl River Delta region is well developed, with tens of thousands of VOCs emission sources such as electronics, plastics, metal products, furniture, chemicals, shoemaking, automobiles, and printing. Studies have shown that the contribution rate of VOCs emissions from industrial sources in the Pearl River Delta region is even greater. up to 50%. The Chinese government clear...

Examples

Embodiment 1

[0039] Organic waste gas in the spraying workshop of an aluminum profile factory, with an air volume of 5000m 3 / h, the exhaust gas temperature is 45°C, the main component is benzene, and the average concentration is 35mg / m 3 ;The average concentration of toluene is 125mg / m 3 ;The average concentration of xylene is 150mg / m 3;The average concentration of n-hexane is 100mg / m 3 ;The average concentration of n-heptane is 75mg / m 3 , the average particle concentration is 158mg / m 3 .

[0040] Process 1 was used to treat it. The composition of the absorption liquid and the purification effect of pollutants are shown in Table 1.

[0041] Table 1 Absorption liquid composition and pollutant purification effect in Example 1

[0042]

[0043] It can be seen from Table 1 that process 1 and its series of absorbing liquids described in Example 1 have a good removal effect on spraying organic waste gas.

Embodiment 2

[0045] A furniture factory emits organic waste gas with an air volume of 7000m 3 / h, the exhaust gas temperature is 40°C, the main component is butanone, and the average concentration is 30mg / m 3 ;The average concentration of benzene is 153mg / m 3 ;The average concentration of toluene is 50mg / m 3 ;The average concentration of xylene is 250mg / m 3 ; The average concentration of ethyl acetate is 130mg / m 3 , the average concentration of butyl acetate is 180mg / m 3 , the average particle concentration is 236mg / m 3 .

[0046] Process 2 was used to treat it. The composition of the absorption liquid and the purification effect of pollutants are shown in Table 2.

[0047] Table 2 Absorption liquid composition, adsorbent type and pollutant purification effect in Example 2

[0048] It can be seen from Table 2 that the process 2 and its series of absorbing solutions described in Example 2 all have good removal effects on furniture organic waste gas.

Embodiment 3

[0050] A circuit board factory discharges organic waste gas with an air volume of 10,000m 3 / h, the exhaust gas temperature is 40°C, the main component is toluene, and the average concentration is 85mg / m 3 ; The average concentration of butyl acetate is 74mg / m 3 ;The average concentration of xylene is 76mg / m 3 , the average concentration of particulate matter is 534mg / m 3 .

[0051] Process 1 and process 2 were used to treat them respectively. The composition of absorption liquid and adsorbent and the purification effect of pollutants are shown in Table 3.

[0052] Table 3 Absorption liquid composition, adsorbent type and pollutant purification effect in Example 2

[0053]

[0054] It can be seen from Table 3 that the process 1 and its series of absorbing liquids described in Example 3 have a good removal effect on the organic waste gas of the circuit board factory, and the process 2 is adopted on the basis of process 1, and the removal rate of each pollutant is further...

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