GB 31570-2015Emission standard of pollutants for petroleum refining industry (English PDF)

3.1 Petroleum refining industry

The industry that produces gasoline fractions, diesel oil fractions, fuel oil, lubricating oil, petroleum wax, petroleum asphalt and petrochemical materials based on raw materials of crude oil, heavy oil, etc.

3.4 Polluted rainwater

The rainwater of surface runoff in petroleum refining industrial enterprises or production facility area, of which the pollutant concentration is higher than the direct emission limits as specified in this Standard.

3.5 Alkaline wastewater

The wastewater that is generated during alkali refining of oils and gas products in petroleum refining industry and desulfurization amine liquid regeneration process.

3.6 Sour water

The wastewater, generated during petroleum refining industrial processes, that contains sulfur >=50 mg/L and ammonia nitrogen >=100 mg/L.

3.7 Aromatic hydrocarbon wastewater

The wastewater that is discharged by production equipment, after direct contact with material during aromatic hydrocarbons (benzene, toluene, xylene, styrene) production process.

3.10 Effluent volume of per ton crude oil

The ratio OF the volume of wastewater that is discharged to environment TO the processing volume of crude oil, during production process of petroleum refining enterprises, in a certain measurement time. Processing volume of crude oil includes the volume of crude oil for primary processing and directly for secondary processing.

3.12 Direct discharge

The behavior that pollutant discharging organizations directly drain water pollutants to environmental waters.

3.13 Indirect discharge

The behavior that pollutant discharging organizations drain water pollutants to public sewage treatment system.

3.14 Volatile organic compounds

Organic compounds that involve in atmospheric photochemical reactions, or organic compounds measured or checked according to a predetermined method.

3.15 Non-methane hydrocarbon

A generic term (counted in carbon) of hydrocarbons, except methane, adopting a prescribed monitoring method, to which the detector has a significant response. This Standard uses “non-methane hydrocarbon (NMHC)” as an integrated control indicator for emission of volatile organic compounds in exhaust and at enterprise boundary.

3.26 Existing facility

Oil refining industry enterprises or production facilities that have been constructed and put into operation before the implementation date of this Standard or of which the environmental impact assessment document has been approved.

3.27 New facility

Newly established, renovated and expanded construction projects in petroleum refining industry of which the environmental impact assessment documents are approved after the implementation date of this Standard.

3.28 Enterprise boundary

Legal boundary of petroleum refining industrial enterprises. If there is no legal boundary, it refers to actual land occupation boundary of enterprises or production facilities.

4.1 Existing facilities shall still implement existing standards prior to July 1, 2017; from

July 1, 2017, they shall implement water pollutant discharge limits specified in Table 1.

4.2 New facilities shall implement water pollutant emission limits specified in Table 1, from

July 1, 2015.

4.4 Emission concentration limits of water pollutants shall apply to the circumstances that

actual effluent volume of per ton crude oil is not more than benchmark water displacement.

If actual effluent volume of per ton crude oil exceeds predetermined benchmark water

5.1 Organized emission control requirements

5.1.1 Existing facilities shall still implement existing standards prior to July 1, 2017; from

July 1, 2017, they shall implement water pollutant discharge limits specified in Table 3.

5.1.3 In accordance with the requirements of environmental protection work, in areas

where territorial development density has already been high, environment carrying capacity begins to weaken, or special protection measures need to be taken due to small capacity of air environment, fragile ecological environment and being prone to severe air pollution problems, then pollutant emission behavior of enterprises shall be strictly controlled.

5.2 Pollution control requirements of volatile organic liquid storage tank

5.2.1 The following pollution control requirements of organic liquid storage tank shall be

implemented by new facilities from July 1, 2015 and by existing facilities from July 1, 2017.

5.2.2 Volatile organic liquids of which the storage true vapor pressure is >=76.6kPa shall

adopt pressurized storage tank.

5.2.4 Opening of floating disc of floating roof tank, crack sealing facilities and sealing

facilities between floating disc and tank wall shall all be airtight in operating conditions.

5.2.5 Floating disc shall be inspected at least once every 6 months; the state of floating

disc sealing facilities shall be recorded for each inspection; the record shall be kept for more than one year.

5.3 Leakage pollution control requirements of equipment and pipeline components

5.3.1 Leakage pollution control requirements of following equipment and pipeline

components shall be implemented by new facilities from July 1, 2015 and by existing facilities from July 1, 2017.

5.3.3 Leakage detection period

Adopt different leakage detection periods according to the types of equipment and pipeline components.

5.3.4 Leakage identification

It is deemed as leakage when following cases occur.

5.3.5 Leakage repair

a) When leakage is detected, repair shall be done as soon as possible, usually no later than 15 days after leakage is found.

5.4 Other pollution control requirements

5.4.1 Following pollution control requirements shall be implemented by new facilities from

July 1, 2015 and by existing facilities from July 1, 2017.

5.4.2 Wastewater pretreatment

For alkaline wastewater, sour water, aromatic hydrocarbon wastewater, flue gas desulfurization and denitration wastewater, chemical cleaning wastewater during equipment and pipeline overhaul, and maintenance process, they shall be separately collected, stored and preprocessed.

5.4.7 Flare system

a) Adopt measures to recover the gases and liquids discharged into flare system.

b) At any time, volatile compounds and odorous substance into the flare can be ignited and sufficiently burned.

c) It shall continuously monitor and record the operating state (flare gas flow, flare head temperature, fire gas flow, fire temperature, etc.) of ignited facilities and flare; and keep the record for more than 1 year.

6.1 General requirements

6.1.1 Enterprises shall establish enterprise monitoring system, develop monitoring

programs, voluntarily monitor pollutant discharges and the impact on surrounding environment, keep the original monitoring records, and publish monitoring results in accordance with relevant laws and the “Environmental Monitoring Management Approach”.

6.1.5 Enterprise crude oil processing volume shall be checked and ratified based on

statutory statements.

6.2 Monitoring and analysis of water pollutants

6.2.1 Monitoring and sampling of water pollutants shall be implemented according to the

provisions of HJ/T 91, HJ 493, HJ 494 and HJ 495.

6.3 Air pollutant monitoring and analysis

6.3.1 Monitoring sampling of air pollutants in exhaust shall be carried out according to the

provisions of GB/T 16157, HJ/T 397, HJ 732, HJ/T 373 or HJ/T 75, HJ/T 76.Monitoring of air pollutants at enterprise boundary shall be implemented according to the provisions of HJ/T 55.

6.3.2 Equipment and pipeline components of petroleum refining industrial enterprises

shall be numbered and permanently marked; leakage detection shall be carried out according to the provisions in HJ 733.

7.1 This Standard shall be implemented and supervised by environmental protection

competent department of the people’s government at county level above.

7.2 Petroleum refining industrial enterprises shall comply with pollutant control

requirements specified in this Standard in any circumstances, and take necessary measures to ensure the normal operation of pollution control facilities.