Food odor

The waste gas produced by the food industry is often water vapor and odor, and some segments will have a certain temperature. Wastewater produced by food factories: high solid impurities; high content of organic substances; high BOD and COD values; easy to rot, generally non-toxic.

Main components:

The main components of the exhaust gas from food processing plants are methyl methacrylate, ethyl acetate, ethyl acetoacetate, aldehydes, ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, etc.; these exhaust gases can cause serious harm to human health and the ecological environment, with the lighter ones causing discomfort, headache, dizziness, nausea, vomiting, loss of appetite and lack of concentration, and the heavier ones causing different degrees of toxicity to the human respiratory system, the Circulatory system, digestive system and reproductive system to varying degrees of toxicity, including aromatic compounds such as benzene, toluene, styrene, etc. can also cause human body to produce deformation, cancer. Therefore, the exhaust gas treatment of food factories is very important.

Exhaust emission standards, with reference to the "Volatile Organic Compounds Control Emission Standards" (GB37822-2019), "Shandong Province Volatile Organic Compounds Emission Standards" (DB37-2801), the following table of exhaust emission standards:

(1) information provided by the owner in relation to the project

(2) "Law of the People's Republic of China on Environmental Protection" (2015-01-01)

(3) "Air Pollution Prevention and Control Law of the People's Republic of China" (2016-01-01)

(4) Ambient Air Quality Standards (GB3095-2012)

(5) "Law of the People's Republic of China on the Promotion of Cleaner Production", Decree No. 72 of the President of the People's Republic of China

(6) National Environmental Protection "Thirteenth Five-Year" Plan

(7) "Comprehensive Emission Standards for Air Pollutants" (GB16297-1996)

(8) "Emission Standards for Odor Pollutants" (GB14554-1993)

(9) "Environmental Protection Design Code for Construction Projects" (GB50483-2009)

(10) "Design Code for Heating, Ventilation and Air Conditioning" (GB50019-2003)

(11) "Building Design Fire Code" (GB50016-2014)

(12) "Code for the design of power supply and distribution systems" (GB50052-2009)

(13) "Emission Standards for Volatile Organic Compounds Control in Industrial Enterprises" DB13/2322-2016

The proposed process route uses "catalytic combustion + dust removal + odor removal + acid and alkali washing" for effective waste gas treatment. The process equipment diagram is as follows:

酸碱洗+除尘+除味

(1) After the waste gas is pretreated to remove dust and particulate matter, it is sent to the activated carbon adsorber. When the activated carbon adsorber Ⅰ is close to saturation, firstly, the treated gas is automatically switched to the activated carbon adsorber Ⅱ (activated carbon adsorber Ⅰ stops adsorption operation), and then the hot airflow is used to desorb and desorb the activated carbon adsorber Ⅰ to desorb the organic matter from the activated carbon. In the desorption process, the organic waste gas has been concentrated, the concentration is tens of times higher than the original, up to 2000ppm or more, the concentrated waste gas is sent to the catalytic decomposition device, and finally it is discharged as CO2 and H2O.

(2) After completing desorption and desorption, the activated carbon adsorber Ⅰ enters the standby state, and when the activated carbon adsorber Ⅱ is close to saturation, the system automatically switches back and desorbs and desorbs the activated carbon adsorber Ⅱ at the same time, so the cycle works.

(3) When the concentration of organic waste gas reaches 2000ppm or more, the catalytic bed can be maintained in self-ignition without external heating. This solution not only saves the energy consumption greatly, but also reduces the equipment investment because the processing capacity of catalytic decomposer is only 1/10 of the original exhaust gas processing capacity. This solution is suitable for both continuous and intermittent operation.

1 Field visit Technical survey

2 Secondary demonstration Provide solutions

3 Technical exchange Both sides visit each other

4 Construction according to the contract Acceptance and delivery

5 File and record service forever