Boiler air pollutant emission standards

GB13271-2001

In order to implement the "Environmental Protection Law of the People's Republic of China" and the "Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution", to control the emission of boiler pollutants and prevent air pollution, the State Environmental Protection Administration has formulated the "Boiler Air Pollutant Emission Standards", the standard since January 1 Implemented. The full text is as follows:

1 Scope This standard specifies the emission limits of the high emission limits and smoke blackness of soot, sulfur dioxide and nitrogen oxides in boiler flue gas.
This standard is applicable to the management of atmospheric pollutants emitted by coal, oil and gas boilers of various capacities and uses except for coal-fired power generation boilers and single-generation power generation boilers with a power output greater than 45.5 MW (65 t/h), and the construction project environment. Impact assessment, design, completion acceptance and sewage management after completion.

Boilers that use fuels such as bagasse, sawdust, rice husks, and bark are referred to the high allowable emission concentrations of atmospheric pollutants in coal-fired boilers in this standard.

2 Reference Standards The provisions contained in the following standards constitute provisions of this standard by reference in this standard.
GB 3095-1996 Ambient Air Quality Standard
GB 5468-9l boiler smoke test method
GB/T16l57-1996 Determination of particulate matter in fixed pollution source exhaust gas and sampling method of gaseous pollutants


3 definition
3.1 Standard state The state of the boiler flue gas is 273K and the pressure is 101325Pa, referred to as “standard state”. The emission concentrations specified in this standard refer to the values ​​in the dry flue gas under standard conditions.
3.2 The initial emission concentration of soot refers to the concentration of soot emitted from the flue gas outlet of the boiler or before entering the purification unit.
3.3 Soot emission concentration refers to the concentration of soot emitted by the boiler flue gas after passing through the purification device. At the end of the boiler where the purification device is installed, the initial emission concentration of the soot is the concentration of the boiler soot.
3.4 Natural ventilation boiler Natural ventilation is a kind of ventilation method that uses the pressure difference generated by the difference of temperature inside and outside the chimney to inhale the air into the furnace and participate in combustion to discharge the combustion products to the atmosphere. A boiler that uses natural ventilation and is not mechanically ventilated by drums or induced draft fans is called a natural ventilation boiler.
3.5 The ash content received, based on the coal received in the state, is also referred to as “application-based ash” and is indicated by “Aar”.
3.6 Excess Air Ratio The ratio of the actual air consumption to the theoretical air requirement for fuel combustion is indicated by “α”.

4 Technical content

4.1 Applicable area classification categories The first-class areas and the second- and third-class areas in this standard refer to the classification areas of the ambient air quality functional areas specified in GB3095-1996 Ambient Air Quality Standards.
The “two control zones” in this standard refers to the scope of the acid rain control zone and the sulfur dioxide pollution control zone as specified in the “Reply of the State Council on Acid Rain Control Zones and Sulfur Dioxide Pollution Control Zones”.
4.2 Year-end division This standard is divided into two stages according to the built-up life of the boiler, and different air pollutant discharge standards are implemented.
I period: a boiler built before December 31, 2000;
Period II: Boilers that have been built and used since January 1, 2001 (including boilers that have not been built or are not in operation during the I period and boilers that need to be expanded or rebuilt in the built-in boilers).

4.3 Boiler soot high allowable discharge concentration and smoke blackness limit shall be implemented according to the time period specified in Table 1.

Table 1 Boiler soot high allowable emission concentration and smoke blackness limit ———————————————————————————————— -
Soot Emission Concentration (mg/m3) Flue Gas Blackness Boiler Category Applicable Area I Period II Period (Lingeman Blackness, Level)
———————————————————————————————————
Natural ventilation boiler class 100 80 1
Combustion (<0.7MW 1t/h) Class II and III 150 120
coal---------------------------------
Pot class 1 100 80
Furnace other boilers, Class 2, 250 200 1
Three types of district 350 250
———————————————————————————————————
Light diesel oil, kerosene area 80 80 1
Burning second and third class area 100 100
oil---------------------------------
Pot other fuel oil category 100 80* 1
Furnace 2nd and 3rd Class 200 150
———————————————————————————————————
Gas boiler all areas 50 50 1
———————————————————————————————————
Note: *In the first-class area, it is forbidden to build new boilers with heavy oil and residual oil as fuel.


4.4 Boiler sulfur dioxide and nitrogen oxides Zui high allowable emission concentration, according to the time period specified in Table 2.

Table 2 Boiler sulfur dioxide and nitrogen oxides Zui high allowable emission concentration —————————————————————————————————
SO2 emission concentration (mg/m3) NOx emission concentration (mg/m3)
Boiler category Applicable area I Period II Period I Period II Period——————————————————————————————————
The entire area of ​​coal-fired boilers is 1200 900 / /
All areas burning light diesel oil and kerosene boilers 700 500 / 400
Other fuel oil boilers all areas 1200 900* / 400*
Gas boilers all areas 100 100 / 400
———————————————————————————————————
Note: *In the first-class area, it is forbidden to build new boilers with heavy oil and residual oil as fuel.

4.5 The initial emission concentration and smoke blackness limit of coal-fired boiler soot shall be implemented according to the time limit of Table 3 according to the factory time of boiler sales.

Table 3 Initial emission concentration and smoke blackness limit of coal-fired boilers —————————————————————————————————— -
Coal-fired dust received initial flue gas blackness boiler type base ash (%) concentration (mg/m3) (Lingeman blackness, grade)
I Period II Period ———————————————————————————————————
Natural ventilation boiler / 150 120 1
(<0.7MW 1t/h )
Layer burning ————————————————————————————————
Boiler other boiler Aar≤25% 1800 1600 1
(≤2.8MW 4t/h) Aar>25% 2000 1800
————————————————————————————————
Other boilers Aar≤25% 2000 1800 1
(>2.8MW 4t/h ) Aar >25% 2200 2000
———————————————————————————————————
Circulating fluidized bed boiler / 15000 15000 1
boiling--------------------------------
Boiler other boiling boiler / 20000 18000
———————————————————————————————————
Coal shovel boiler / 5000 5000 1
———————————————————————————————————


4.6 Other regulations

4.6.1 Provisions for the height of the boiler house in coal-fired, fuel-fired (excluding burning light diesel oil and kerosene).
4.6.1.1 Only one chimney can be set in each new boiler room. The height of the chimney should be implemented according to the provisions of Table 4 according to the total installed capacity of the boiler room.

Table 4 Coal-fired, fuel (except burning light diesel, kerosene) boiler house chimney zui low allowable height ——————————————————————————— ——————
Boiler room installed MW <0.7 0.7-<1.4 1.4-<2.8 2.8-<7 7-<14 14-<28
Total capacity of the machine——————————————————————————————
t/h <1 1-<2 2-<4 4-<10 10-<20 20-≤40
———————————————————————————————————
Chimney zui low m 20 25 30 35 40 45
Allow height———————————————————————————————————


4.6.1.2 When the total installed capacity of the boiler room is greater than 28MW (40t/h), the height of the chimney shall be determined in accordance with the requirements of the approved environmental impact report (table), but not less than 45m. When there is a building within a radius of 200m around the chimney of the new boiler house, the chimney should be higher than the building with a height of more than 3m.

4.6.2 Provisions for the height of chimneys for gas, light diesel and kerosene boilers

The chimney height of gas, light diesel oil and kerosene boilers shall be determined in accordance with the requirements of the approved environmental impact report (table), but not less than 8m.

4.6.3 If the height of various boiler chimneys does not meet any of the requirements of 4.6.1 and 4.6.2, the high allowable emission concentration of soot, SO2 and NOxzui shall be discharged according to the corresponding region and time zone. 50% of the standard value is executed.

4.6.4 ≥0.7MW (1t/h) various boiler chimneys shall be set up according to the provisions of GB 5468-91 and GB/T16157-1996 to facilitate permanent sampling of monitoring holes and related facilities, as of the date of implementation of this standard. Newly built (including expansion and reconstruction) boilers with a capacity of ≥14MW (20t/h) must be installed with a fixed instrument for continuously monitoring the concentration of soot and SO2 in the flue gas.

5 Monitoring

5.1 The sampling method for monitoring the emission concentration of boiler soot, sulfur dioxide and nitrogen oxides shall be carried out in accordance with the provisions of GB 5468 and GB/T16157. The analysis methods of sulfur dioxide and nitrogen oxides are carried out in accordance with the regulations of the State Environmental Protection Administration. (Before the national standard is promulgated, the "Air and Exhaust Gas Monitoring and Analysis Method" is temporarily used, published by China Environmental Science Press).

5.2 The measured concentration of boiler soot, sulfur dioxide and nitrogen oxides shall be converted according to the excess air coefficient a specified in Table 5.

Table 5 Conversion value of excess air coefficient of various boilers——————————————————————————————————
Boiler type conversion project excess air factor ————————————————————————————————————
Initial emission concentration of coal-fired boiler soot a=1.7
Soot and sulfur dioxide emission concentration a=1.8
Fuel, gas boiler soot, sulfur dioxide, nitrogen oxide emission concentration a=1.2
———————————————————————————————————


6 Standard implementation
6.1 Boilers located in the two control areas, in addition to the implementation of this standard, the sulfur dioxide emissions should also implement the total control standards specified in the control area.
6.2 This standard is supervised and implemented by the environmental protection department of the people's government at or above the county level.