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[ Policies and Regulations of Chemical Machinery Equipment Network ] Standardized discharge outlets are a prerequisite for scientific monitoring and evaluation of pollutant discharge.
The Air Pollution Prevention and Control Law clearly stipulates that pollutants should set up discharge outlets in accordance with national regulations, and it is illegal to set them up in accordance with regulations
.
So what are the national regulations? How to set the discharge port to meet the requirements?
Chemical Machinery and Equipment Network Policies and Regulations Chemical Machinery and EquipmentThe Air Pollution Prevention and Control Law clearly stipulates that pollutants should set up discharge outlets in accordance with national regulations, and it is illegal to set them up in accordance with regulations
.
So what are the national regulations? How to set the discharge port to meet the requirements?
★In which documents are the national regulations?
1.
Former State Environmental Protection Administration "Technical Requirements for Standardized Remediation of Sewage Outlets" (Environmental Supervision (1996) No.
470)
Former State Environmental Protection Administration "Technical Requirements for Standardized Remediation of Sewage Outlets" (Environmental Supervision (1996) No.
470)
2.
"Measurement of Particulate Matter in Exhaust from Stationary Pollution Source and Sampling Method of Gaseous Pollutants" (GB/T16157-1996)
"Measurement of Particulate Matter in Exhaust from Stationary Pollution Source and Sampling Method of Gaseous Pollutants" (GB/T16157-1996)
3.
"Technical Specification for Stationary Source Exhaust Gas Monitoring" (HJ/T397-2007)
"Technical Specification for Stationary Source Exhaust Gas Monitoring" (HJ/T397-2007)
4.
"Technical Specification for Continuous Monitoring of Smoke (SO2, NOX, Particulate Matter) Emissions from Stationary Pollution Sources" (HJ75-2017)
"Technical Specification for Continuous Monitoring of Smoke (SO2, NOX, Particulate Matter) Emissions from Stationary Pollution Sources" (HJ75-2017)
5.
"Comprehensive Emission Standard of Air Pollutants" (GB16297-1996) and corresponding industry emission standards
"Comprehensive Emission Standard of Air Pollutants" (GB16297-1996) and corresponding industry emission standards
★What are the regulations in these documents?
1.
The discharge outlet is set up with the principle of "easy to collect samples, easy to measure and monitor, and convenient for daily on-site supervision and inspection"
.
The discharge outlet is set up with the principle of "easy to collect samples, easy to measure and monitor, and convenient for daily on-site supervision and inspection"
.
2.
The exhaust pipe (chimney) should be equipped with monitoring sampling holes, sampling platforms and safety passages
.
The exhaust pipe (chimney) should be equipped with monitoring sampling holes, sampling platforms and safety passages
.
3.
The location of the sampling hole should be preferentially selected in the vertical pipe section and the negative pressure area of the flue
.
The location of the sampling hole should be preferentially selected in the vertical pipe section and the negative pressure area of the flue
.
4.
The location of the sampling hole should avoid the flue elbow and the part where the section changes sharply, and it should be set at a distance not less than 6 times the flue diameter in the downstream direction of the elbow, valve, and reducing pipe, and not less than 3 in the upstream direction of the above components.
Times the diameter of the flue
.
For a rectangular flue, its equivalent diameter D=2AB/(A+B), where A and B are side lengths
.
The location of the sampling hole should avoid the flue elbow and the part where the section changes sharply, and it should be set at a distance not less than 6 times the flue diameter in the downstream direction of the elbow, valve, and reducing pipe, and not less than 3 in the upstream direction of the above components.
Times the diameter of the flue
.
For a rectangular flue, its equivalent diameter D=2AB/(A+B), where A and B are side lengths
.
5.
The air velocity of the sampling section is ≥5m/s
.
The air velocity of the sampling section is ≥5m/s
.
6.
Set up a monitoring sampling hole at the selected measurement position.
The inner diameter of the sampling hole flange should be no less than 100mm, and the length of the sampling hole pipe should be between 100mm-200mm.
When not in use, the flange should be sealed with a blind plate
.
Set up a monitoring sampling hole at the selected measurement position.
The inner diameter of the sampling hole flange should be no less than 100mm, and the length of the sampling hole pipe should be between 100mm-200mm.
When not in use, the flange should be sealed with a blind plate
.
7.
The sampling platform is set up for sampling by the inspectors, and there should be enough working area for the staff to operate safely and conveniently
.
The area of the sampling platform should be greater than 6m2, and a safety fence of 1.
2m or more should be set around it.
The surface of the sampling platform should be about 0.
5-1.
5m away from the sampling hole
.
The sampling platform is set up for sampling by the inspectors, and there should be enough working area for the staff to operate safely and conveniently
.
The area of the sampling platform should be greater than 6m2, and a safety fence of 1.
2m or more should be set around it.
The surface of the sampling platform should be about 0.
5-1.
5m away from the sampling hole
.
8.
The sampling platform should be equipped with a permanent power supply (not less than two 10A three-hole sockets to ensure the power required by the monitoring equipment)
.
A rainproof shed should be built above the platform (the rainproof shed is required to cover the entire sampling platform and install lighting)
.
The sampling platform is easy for personnel to reach, and monitoring safety channels should be built
.
When the platform is set at a height of ≥2m from the ground, an inclined ladder/Z-shaped ladder/rotary ladder leading to the platform should be constructed.
The width of the ladder section should not be less than 0.
9m, and the angle of the ladder should not be greater than 50º
.
The sampling platform should be equipped with a permanent power supply (not less than two 10A three-hole sockets to ensure the power required by the monitoring equipment)
.
A rainproof shed should be built above the platform (the rainproof shed is required to cover the entire sampling platform and install lighting)
.
The sampling platform is easy for personnel to reach, and monitoring safety channels should be built
.
When the platform is set at a height of ≥2m from the ground, an inclined ladder/Z-shaped ladder/rotary ladder leading to the platform should be constructed.
The width of the ladder section should not be less than 0.
9m, and the angle of the ladder should not be greater than 50º
.
★Under what circumstances need to install pollution source automatic monitoring facilities? Those who meet any of the following conditions need to install automatic monitoring facilities:
1.
Included in the list of key pollutant discharge units issued by the competent department of ecological environment of the people's government at or above districts or the construction plan for automatic monitoring of pollution sources
.
Included in the list of key pollutant discharge units issued by the competent department of ecological environment of the people's government at or above districts or the construction plan for automatic monitoring of pollution sources
.
2.
The installation of automatic monitoring is required in the EIA and approval documents
.
The installation of automatic monitoring is required in the EIA and approval documents
.
3.
The pollution discharge permit states that the discharge outlet should be automatically monitored
.
The pollution discharge permit states that the discharge outlet should be automatically monitored
.
4.
The application for pollutant discharge permits and technical specifications for issuance, technical guidelines for pollutant discharge units' self-monitoring, etc.
require that the monitoring frequency be automatic monitoring
.
The application for pollutant discharge permits and technical specifications for issuance, technical guidelines for pollutant discharge units' self-monitoring, etc.
require that the monitoring frequency be automatic monitoring
.
5.
Exhaust gas chimney ≥45m
.
Exhaust gas chimney ≥45m
.
6.
All centralized exhaust gas discharge outlets for industrial enterprises in key industries such as thermal power, steel, cement, casting, coking, carbon, glass, ceramics, nitrogen fertilizer, petrochemical, non-ferrous metal smelting, raw material medicine manufacturing, and pesticides
.
All centralized exhaust gas discharge outlets for industrial enterprises in key industries such as thermal power, steel, cement, casting, coking, carbon, glass, ceramics, nitrogen fertilizer, petrochemical, non-ferrous metal smelting, raw material medicine manufacturing, and pesticides
.
7.
Any major pollutant (particulate matter/sulfur dioxide/nitrogen oxide) discharge port with daily average discharge ≥ 10 kg under normal production conditions of the enterprise
.
Any major pollutant (particulate matter/sulfur dioxide/nitrogen oxide) discharge port with daily average discharge ≥ 10 kg under normal production conditions of the enterprise
.
Original title: Follow! How to construct exhaust gas outlets to meet the requirements?
