Emission concentration x emission flue gas quantity x operating hours In fact, there should be a continuous flue gas monitoring CEMS.
The total cumulative emissions can be obtained through statistics.
Let me answer how to calculate the emission of atmospheric pollutants from boilers.
There are three ways:
1, monitoring data method, calculated according to the amount of smoke and dust, pollutant emission concentration or emission rate in the monitoring report.
2. Material balance algorithm. This method is based on the law of conservation. The amount of pollutants produced by fuel and raw materials in combustion or other technological processes has a great relationship with the quality and working conditions of fuel raw materials, but there is a universal law. For example, coal quantity * sulfur content * 1.6= sulfur dioxide output, which is the empirical formula that 80% sulfur in coal is converted into sulfur dioxide by default.
3. Production and emission coefficient method. According to the pollutant discharge and treatment level of existing furnaces, the state has summarized the emission coefficients in different processes, which are generally expressed as unit product discharge. For example, the production and discharge coefficient of cement produced by external decomposition in dry rotary kiln is 0.3 1 1 kg sulfur dioxide/ton cement clinker.
Let me answer how to calculate the pollution coefficient of pollutants.
The pollutant production coefficient refers to the statistical average of the quantity of pollutants produced (or discharged) per unit product under normal technical, economic and management conditions.
Commonly used pollution discharge coefficient:
*
Burning one ton of coal produces 1, 600× s% kg SO2, 1, 000 cubic meters of waste gas and 200 kg of soot.
*
Burning a ton of diesel will emit 2000× s% kg SO2, 65438+20000 cubic meters of waste gas; Smoke and dust emission 1 kg.
*
Burning one ton of heavy oil will discharge 2000× s% kg SO2 and 65438+600,000 cubic meters of waste gas; Discharge 2 kilograms of smoke and dust.
*
General enterprises with treatment facilities burn one ton of coal and emit smoke 10- 15 kg.
*
Brick and tile production, 40-80 kilograms of smoke and dust per 10,000 products; Sulfur dioxide 12- 18kg.
Material balance formula:
*
SO2 produced by combustion 1 ton of coal =1600× s kg; Sulfur content, generally 0.6-65438 0.5%. If the sulfur content of coal is 1%, burning 1 ton of coal will emit 16 kg of SO2.
*
SO2 produced by burning 1 ton fuel = 2000×s kg；; Sulfur content, generally heavy oil 1.5-3%, diesel oil 0.5-0.8%. If the sulfur content is 2%, burning 1 ton of oil will emit 40kg of SO2.
Flow coefficient:
Burning one ton of coal will emit 0.9-10.2 million standard cubic meters of combustion waste gas. Burning a ton of oil will discharge 1.2- 1.6 million cubic meters of waste gas, with diesel oil taking a small value and heavy oil taking a large value.
Smoke emission:
Raw coal: 8~ 10 kg of smoke and dust is discharged per ton of raw coal.
Calculation of total industrial waste gas emission;
When there is a measured value of exhaust emissions, use the following formula to calculate:
Q year = Q hours × B years /B hours/10000.
Among them:
Q years-annual exhaust emissions,10,000 standard cubic meters/year;
Q hours-exhaust emission per hour, m3/h;
B-annual fuel consumption (or clinker output), kg/y;
B—— Fuel consumption per hour (or clinker output) under normal working conditions, kg/h.
If there are six exhaust ports, how to calculate the amount of exhaust gas generated and discharged? Let me answer that.
During industrial production, a section or workshop will have an exhaust pipe (the low exhaust pipe is generally less than15m, which is regarded as unorganized emission). If the waste gas produced by production and processing is equipped with flue gas treatment or purification facilities, most or part of it will be treated, and the untreated waste gas will be discharged into the environment, which is the discharge amount. The waste gas contains various pollutants, such as sulfur dioxide, nitrogen oxides, smoke and dust, acid gases, heavy metals and so on. The concentration of these pollutants is monitored by special instruments and equipment, and the discharge of pollutants can be obtained by multiplying it by the flow rate of exhaust gas. On the contrary, the removal amount of pollutants can also be calculated. The amount of pollutants produced is generally calculated by material balance. The amount of waste gas directly discharged by environmental protection facilities without waste gas is the same as the amount of waste gas discharged.
Attached:
. Calculation formula of coal-fired waste gas:
V = (α+b) × k× q low× b ÷10000.
Where: V—— the amount of waste gas from coal burning (ten thousand standard cubic meters)
α —— Excess air coefficient of furnace.
fuel system
K= 1. 1
Q low-low calorific value of coal, q low = 5200 kcal.
B— Coal consumption of boiler (ton)
The current project EIA table is based on the measured concentration or converted concentration to calculate the total emission! I have no national standards. I'll answer it
Both the measured concentration and the converted concentration should be recorded, but the converted concentration should be used when using.
What is the total amount of pollutants emitted by coal-fired boilers? Let me answer that.
At present, the Environmental Protection Agency calculates the sulfur dioxide emissions of coal-fired boilers in the following ways:
1. sulfur dioxide output (kg) = 1600× coal consumption (ton )× sulfur content (%)
2. Sulfur dioxide removal amount (kg) = 1000× gypsum amount (ton )× ×( 1- 0/-moisture% )× gypsum purity %× 64 ÷ 172.
3. Sulfur dioxide emissions (kg) = sulfur dioxide production (kg)-sulfur dioxide removal (kg)
Sulfur dioxide removal is calculated according to limestone/gypsum desulfurization process.
A, the calculation of flue gas quantity:
-theoretical air demand (Nm3/Kg or Nm3/Nm3 (gaseous fuel));
Received low calorific value (kJ/kg or kJ/Nm3 (gas fuel));
—— Dry ash-free volatile matter (%);
Vy-flue gas quantity (Nm3/Kg or Nm3/Nm3 (gas fuel));
-Excess air coefficient, =.
1, theoretical air demand
& gt 15% bituminous coal:
& lt 15% lean coal and anthracite:
Inferior coal <12560 kj/kg;
Liquid fuel:
Gas fuel,
Gas fuel, > 14655kJ/Nm3:
2. Calculation of actual flue gas quantity
(1) solid fuel
Anthracite, bituminous coal and lean coal:
& lt 12560kJ/kg inferior coal:
(2) Liquid fuel:
(3) Gas fuel:
& lt at10468kJ/m3:
& gt at 14655kJ/Nm3:
Furnace excess air coefficient table
Combustion mode bituminous coal
chain-conveyer furnace
pulverized coal fired boiler
Fluorine solid furnace
air leakage
location
control
Steel flue of convection economizer for superheater dust collector of preheating furnace
Steel flue air 1.2 anthracite 1.25 heavy oil gas1.3 ~1.51.25 ~1.31.
(per 10 meter)
0. 1
Total flue gas: 0.150.050.1.1.050.01.05.
V- total amount of flue gas, m3/h or m3/a;
B- Fuel consumption, kg/hour, m3/hour, kg/year, m3/year.
3. Calculation of 3.SO2:
Among them:
-Sulfur dioxide output (ton/hour);
B—— Fuel consumption (ton/hour);
C- the share of SO2 produced after combustion of sulfur-containing fuel is generally 0.8;
—— Sulfur content of fuel receiving base (%);
The relative molecular weight of 64-SO2;
32s relative molecular weight.
SO2 concentration (mg/m3):
4, the calculation of smoke and dust
Among them:
-t/h)； Smoke and dust quantity (t/h);
-Fuel receiving base contains ash (%);
-mechanical incomplete combustion heat loss (%);
-Share of fly ash generated by smoke exhaust.
Reference table of heat loss value of mechanical incomplete combustion
Furnace type
comment
pulverized coal fired boiler
Take 7% ~ 10 anthracite from 3 ~ 65 ~ 10 chain furnace.
6~8
10~ 14
6 ~ 10 (%) chain furnace reciprocating furnace (vibrating grate) chain furnace (fixed grate)
Fluorine solid furnace
Fly ash value table
Boiler-type solid slag discharge furnace
60% fly ash 90% 15 ~ 25 stone coal gangue 20% ~ 30% liquid slag furnace15% ~ 30% cyclone furnace.
Smoke concentration (mg/m3):
Calculate the pollutants produced by burning one ton of coal:
Burning one ton of coal produces 1, 600× s% kg SO2, 1, 000 cubic meters of waste gas and 200 kg of soot.
Burning a ton of diesel will emit 2000× s% kg SO2, 65438+20000 cubic meters of waste gas; Smoke and dust emission 1 kg.
Burning one ton of heavy oil will discharge 2000× s% kg SO2 and 65438+600,000 cubic meters of waste gas; Discharge 2 kilograms of smoke and dust.
In large power plants, smoke and dust are well controlled, and the removal rate is above 98%. Burning a ton of coal emits 3-5 kilograms of smoke and dust.
General enterprises, with treatment facilities, burn one ton of coal and emit smoke10-15 kg;
Brick and tile production, 40-80 kilograms of smoke and dust per 10,000 products; Sulfur dioxide 12- 18kg.
Large cement plant, ... The remaining full text >>
Ask, know the exhaust air volume, emission concentration, emission rate, how to calculate the total amount of pollutants! I'll answer that.
We all use machines to calculate directly, and advanced testing equipment directly generates data.
If you want to calculate manually, multiply the total exhaust volume by the emission concentration or the emission rate by the total emission time, and the result is the answer you want.
What is the difference between waste gas treatment capacity and waste gas emission? Let me answer that.
Hello, this is easy to understand. During industrial production, a section or workshop will have an exhaust pipe (low exhaust pipe is generally less than15m for unorganized emission). If the waste gas produced by production and processing is equipped with flue gas treatment or purification facilities, most or part of it will be treated, and the untreated waste gas will be discharged into the environment, which is the discharge amount. The waste gas contains various pollutants, such as sulfur dioxide, nitrogen oxides, smoke and dust, acid gases, heavy metals and so on. The concentration of these pollutants is monitored by special instruments and equipment, and the discharge of pollutants can be obtained by multiplying it by the flow rate of exhaust gas. On the contrary, the removal amount of pollutants can also be calculated. The amount of pollutants produced is generally calculated by material balance. The amount of waste gas directly discharged by environmental protection facilities without waste gas is the same as the amount of waste gas discharged.
How to calculate the waste gas output of sewage plant? I'll answer the EIA
No matter what the boiler uses as the heat source, there are three pollution factors: sulfur dioxide, soot and nitrogen oxides. The specific calculation depends on the exhaust gas test report. Calculate the monthly or quarterly pollutant discharge according to the benchmark flue gas volume and the emission concentration inside, and then convert it into equivalent number according to the pollutant equivalent value in the Measures for the Administration of Sewage Charge Collection Standards. Add up the equivalent numbers of three pollutants and multiply them by the collection unit price to get the monthly or quarterly waste gas discharge fee.
This method provides a detailed calculation method.
Let me answer the calculation of exhaust volume.
The amount of waste gas is equal to the workshop waste gas multiplied by the pollutant concentration. If there is a production line, the measured concentration should be used when multiplying the emission rate of the production line, that is, C =C *K*a /a, where a is the excess air coefficient and a is generally 1.8 (see Tianjin landmark); K is the boiler load factor, and generally 1.2 (see Tianjin landmark) is taken to calculate solid C. The emission rate of a pollutant (kg/h) = solid C * exhaust gas emission (under standard temperature and pressure).