This standard is applicable to coal-fired, oil-fired, gas-fired hot water boilers, steam boilers and heat carrier boilers with various capacities for life and production, as well as coal-fired, oil-fired and biomass power generation boilers with a single output not exceeding 45.5MW(65t/h), except pulverized coal power generation boilers.
This standard specifies the maximum allowable emission concentration limit and smoke blackness limit of soot, sulfur dioxide and nitrogen oxides in boiler flue gas according to time period. It is suitable for the emission management of existing boilers, as well as the environmental impact assessment, design, environmental protection completion acceptance and sewage management after the completion of boiler construction projects.
Boiler using coal cake, coal water slurry, petroleum coke and biomass fuel (bagasse, sawdust, straw, bark, etc.). ) Refer to this standard "Emission Concentration of Air Pollutants from Coal-fired Boilers".
Other new alternative fuels shall be implemented according to their forms with reference to the most stringent limits of corresponding fuels in this standard.
This standard does not apply to boilers of various capacities that use domestic garbage and hazardous waste as fuel.
2 normative reference documents
The clauses in the following documents become the clauses of this standard by reference. All subsequent modifications (excluding errata) or revisions of dated reference documents are not applicable to this standard. However, parties who have reached an agreement according to this standard are encouraged to study whether the latest versions of these documents can be used. For undated reference documents, the latest version (including all revisions) is applicable to this document.
GB 5468 Test method for boiler smoke and dust
GB 1327 1 Emission standard of air pollutants for boilers
GB/T 16 157 determination of particulate matter in exhaust gas from stationary pollution sources and sampling method of gaseous pollutants
HJ/T 42 determination of nitrogen oxides in waste gas from stationary pollution sources ultraviolet spectrophotometry
Determination of nitrogen oxides in waste gas from HJ/T 43 stationary pollution source-naphthylethylenediamine hydrochloride spectrophotometric method
HJ/T 55 technical guide for monitoring unorganized emission of air pollutants
HJ/T 56 Determination of Sulfur Dioxide in Exhaust Gas from Stationary Pollution Sources-Iodometric Method
Determination of sulfur dioxide in exhaust gas of HJ/T 57 stationary pollution source-potentiostatic electrolysis method
HJ/T 75 technical specification for continuous monitoring of flue gas emission from stationary pollution sources
Technical requirements and detection methods of HJ/T 76 continuous monitoring system for flue gas emission from fixed pollution sources
HJ/T 398-2007 Determination of smoke blackness of stationary pollution sources-Lingemann smoke blackness chart method
3 Terms and definitions
The following terms and definitions are used in this standard.
3. 1
standard state
The flue gas state with temperature of 273K and pressure of 10 1325Pa is called "standard state" for short. The emission concentration of air pollutants specified in this standard refers to the value of dry flue gas in standard state.
3.2
Continuous monitoring of flue gas emission
It refers to continuous and real-time tracking and monitoring of flue gas emitted by power plants.
3.3
excess air coefficient
The ratio of actual air supply to theoretical air demand during fuel combustion is expressed by "α".
3.4
chimney height
Refers to the height from the plane where the chimney (or boiler room) is located to the chimney exit.
3.5
Maximum allowable emission concentration
Refers to the limit that the average concentration of pollutants shall not exceed in any one hour after the flue gas passes through the purification device; Or refers to the limit that the average concentration of pollutants at the outlet of a boiler without a purification device should not exceed in any hour.
3.6
Initial emission concentration of smoke dust concentration of feed gas
Refers to the flue gas emission concentration at the boiler flue gas outlet or before entering the purification device.
3.7
In use, new construction, expansion, existing boilers in use, new construction, expansion and reconstruction
In-service boiler: refers to the boiler that has been built and put into use before the implementation of this standard (subject to the notice of trial operation from the competent administrative department of environmental protection).
Newly-built boilers: refer to boilers built from scratch (including boilers that have passed the acceptance before the implementation date of this standard, but have not yet been built and put into use).
Expansion boiler: refers to the boiler built to increase the capacity of the boiler room on the basis of the original boiler room.
Retrofit boiler: refers to the upgraded boiler (excluding the technical renovation of low-nitrogen combustion and the renovation of flue gas treatment facilities).
4 technical content
4. 1 regional division
The standard divides Guangdong Province into two regions, A and B, and the corresponding emission limits are implemented according to the regions.
Area A: The Pearl River Delta Economic Zone and the built-up areas of key environmental protection cities outside the Pearl River Delta Economic Zone. The administrative jurisdiction of the Pearl River Delta Economic Zone includes Guangzhou, Shenzhen, Zhuhai, Dongguan, Zhongshan, Jiangmen, Foshan and Huicheng; Huiyang, Huidong and Boluo in Huizhou; Duanzhou, Dinghu, Gaoyao and Sihui in Zhaoqing. The range is east longitude 1 1 1? 59.7′~ 1 15? 25.3', latitude 20? 17.6′~23? 55.9′。
Area B: the administrative area outside Area A. ..
4.2 Pollutant Emission Limits
4.2. 1 The maximum allowable emission concentration of boiler smoke and dust shall be implemented according to the provisions of Table 1.
Table 1 Maximum allowable emission concentration of boiler smoke and dust and smoke blackness limit
Smoke emission concentration limit value of boiler category applicable area (mg/m3) Smoke blackness
(Ringelmann Blackness, Grade)
Execution date of boilers in use: execution date of newly built, expanded and rebuilt boilers.
20 10, 1 1, 20 13, 1, 20 10, 1 1, 20 1.
Coal-fired boiler ≥ 10t/h boiler A 120
80a 80 80 1.0
B 100
80a 100
80a
& lt 10t/h all areas 150.
80a 120
80a 120
80a
Oil-fired boilers, light diesel oil and kerosene, all 80 zones
50a 50 50
Other oils A 50 50
B 80 80
All areas of gas-fired boilers 30 30 30
Note: boilers in nature reserves, scenic spots and other areas requiring special protection are subject to this restriction.
4.2.2 The maximum allowable emission concentration of boiler sulfur dioxide shall be implemented according to the provisions in Table 2.
Table 2 Maximum allowable emission concentration of sulfur dioxide from boiler: mg/m3
Execution date of boiler in use in the applicable area of boiler category The execution date of boiler construction, expansion and reconstruction.
20 10, 1 1, 20 13, 1, 20 10, 1 1.
Coal-fired boiler ≥ 10t/h A 450 300 300
B 600 400 400
& lt 10/0t/h 500 400 400
B 650 500 500
All oil products of oil-fired boiler A 500 300 300
Light diesel oil and kerosene B 500 400 400
Other 600
Gas-fired boilers All areas of boilers using blast furnace gas and coke oven gas as fuel are 100 100 100.
Other gas-fired boilers 50 50 50
4.2.3 The maximum allowable emission concentration of nitrogen oxides from boilers shall be implemented according to the provisions in Table 3.
Table 3 Maximum allowable emission concentration of nitrogen oxides from boilers Unit: mg/m3
Execution date of boiler in use in the applicable area of boiler category The execution date of boiler construction, expansion and reconstruction.
20 10, 1 1, 20 13, 1, 20 10, 1 1.
Coal-fired boiler ≥ 10t/h boiler A 400 200 200
B 300 300
& lt 10t/h A 300 300
B 400 400
Oil-fired boiler A 400 300 300
B 400 400 400
All areas of gas boiler 200 200 200
4.2.4 Provisions on control limits of unorganized dust emission in coal-fired boiler room
See Table 4 for the control limit of unorganized dust emission in coal-fired boiler room.
Table 4 Control limit of unorganized dust emission in coal-fired boiler room
Unorganized dust
(concentration difference between monitoring point and upwind reference point, mg/m3) 0.5
4.2.5 Control measures for unorganized dust in coal-fired boiler room
See appendix a for the control measures of unorganized dust in coal-fired boiler room.
4.3 chimney height
4.3. 1 Provisions on chimney height of coal-fired boiler room
The chimney height of the boiler room with a total capacity of 28MW(40t/h) or less shall be as specified in Table 5. When the total installed capacity of the boiler room is more than 28MW(40t/h), the chimney height shall be determined according to the requirements of the approved environmental impact report (table), but it shall not be less than 45m. When there are buildings within a radius of 200m around the chimney of the new boiler room, the chimney should be more than 3m higher than the tallest building.
Table 5 Minimum allowable height of chimney in coal-fired and oil-fired boiler rooms (except for light diesel oil and kerosene)
Boiler room installation
Total capacity (d) MW d < 0.70.7 ≤ d <1.41.4 ≤ d < 2.82.8 ≤ d < 77 ≤ d <14 ≤ d ≤ 28.
t/h D < 1 1≤D < 2 2≤D < 4 4≤D < 10 10≤D < 20 20≤D≤40
The chimney is the lowest.
Allowable height m 20 25 30 35 40 45
4.3.2 Provisions on chimney height of gas-fired and oil-fired boilers
The chimney height of gas-fired and oil-fired boilers and the distance from surrounding residential buildings shall be determined according to the approved environmental impact report (table), but not less than 8m.
4.3.3 Treatment when the height of boiler chimney can't reach the specified height
If any of the provisions in 4.3. 1 and 4.2.2 cannot be met, the maximum allowable emission concentration of soot, sulfur dioxide and nitrogen oxides shall be 50% of the emission standard values in the corresponding regions and time periods.