The waste gas of this project mainly contains ammonia gas, which has irritating smell and toxicity. According to the characteristics of ammonia solution that is alkaline and easily soluble in water, the absorption method (three-stage spray tower) is used for treatment. The first-stage spray tower uses acidic liquid agents for neutralization and absorption, and the second-stage and third-stage water absorption is used. According to the detection data of the online pH meter in the spray water tank, acid agents are added and the wastewater in the spray water tank is regularly replaced, and the ammonia containing wastewater is discharged to the sewage treatment station.

Environmental Protection Law of the People's Republic of China (Presidential Decree No. 9, effective January 1, 2015)

Air Pollution Prevention and Control Law of the People's Republic of China (Presidential Decree No. 31, effective January 1, 2016)

"Odor Pollutant Emission Standard" (GB 14554-93)

Noise Emission Standard for Industrial Enterprises (GB 12348-2008)

Environmental Noise Emission Standard for Construction Plants (GB12523-2001)

Design Code for Low Voltage Power Distribution (GB50054-2011)

Design Code for Power Distribution of General Electrical Equipment (GB50055-2011)

Code for the Design of Cables for Power Engineering (GB50217-2007)

Functional Signs and Graphic Symbols of Process Measurement and Control Instruments (HG/T20505-2014)

Regulations on the Selection and Design of Automation Instruments (HG/T20507-2014)

Regulations on the Design of Instrument Power Supply (HG/T20509-2014)

Regulations on the Design of Instrument Air Supply (HG/T20510-2014)

Design Regulations for Signal Alarm and Safety Interlock System (HG/T20511-2014)

"Specification for Construction and Quality Acceptance of Automation Instrument Engineering" (GB50093-2013)

"Regulations on the Design of Instrument Piping and Wiring" (HG/T20512-2014)

Grounding Regulations for Instrumentation Systems (HG/T20513-2014)

(1) Implement the national policy on environmental protection and comply with relevant national regulations, norms and standards.

(2) Starting from the actual situation, it is necessary to protect the environment, but also give full play to the benefits of the project to avoid secondary pollutants.

(3) In order to ensure the reliability and effectiveness of the project, improve the level of automation, reduce operating costs, reduce the workload of daily maintenance and overhaul, and improve the operating conditions of workers, the equipment is selected from well-known brands with good quality and high efficiency.

(4) The layout of the factory area is divided according to functions to ensure a good production and living environment in the factory area, and to meet the requirements of production, life, fire protection and external conditions.

(5) The architectural style of the factory strives to be unified, simple, bright, beautiful and generous, and coordinates with the surrounding environment of the factory.

The warehouse stores ammonia-containing raw materials, which are volatile and form pungent odors and toxicity in the air, affecting the working environment.

Process flow: ammonia-containing exhaust gas collection port and pipeline→ three-stage spray tower→ draft fan→ discharge chimney

"Odor Pollutant Emission Standard" (GB14554-93) ammonia and odor concentration;