Legal analysis: The standard stipulates the maximum allowable emission concentration limit and smoke blackness limit of particulate matter, sulfur dioxide, nitrogen oxides, mercury and its compounds in boiler flue gas. This standard is applicable to single steam boilers with an output of 65t/h or less, hot water boilers with various capacities and organic heat carrier boilers with different capacities, and stoker boilers with coal, oil and gas as fuels. Boilers using briquette, coal water slurry, coal gangue, petroleum coke, oil shale, biomass briquette, etc. shall be implemented with reference to the emission control requirements of coal-fired boilers in this standard. The standard does not apply to boilers that use domestic garbage and hazardous waste as fuel. The standard is applicable to the management of air pollutant emission of boilers in use, as well as the environmental impact assessment of boiler construction projects, the design of environmental protection facilities, the acceptance of environmental protection after completion and the management of air pollutant emission after production.

Legal basis: Law of the People's Republic of China on Prevention and Control of Air Pollution

Article 32 Operators of catering services must take measures to prevent and control oil fume pollution, and the oil fume pollutants discharged shall not exceed the prescribed emission standards. The bottom floor of residential buildings will no longer arrange catering service business places that produce oil smoke pollution; Residential buildings in residential buildings shall not be used as places of business for catering services that produce oil fume pollution.

Regulations on Prevention and Control of Air Pollution in Nanjing

Environmental protection requirements of catering industry: operators of catering industry are required to abide by the following regulations: clean energy must be used, and oil fume must not be discharged into sewer pipes; A fume purification device should be set up to ensure its normal operation, so as to achieve the standard discharge. If the discharged pollutants exceed the standard, the professional operation unit of pollution control should be entrusted to maintain the operation; Set up a special flue for catering industry, and the height and position of the flue outlet shall not affect the surrounding living and working environment. The draft also proposes that anyone who violates these regulations will be fined up to 21,111 yuan.