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This standard is formulated with a view to implementing laws and regulations such as 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, controlling environment pollution, improving ecological environment quality and regulating the construction and operation management of industrial organic waste gas treatment.
This standard specifies the technical requirements for design, construction, acceptance, operation and maintenance of industrial organic waste gas treatment by regenerative thermal oxidation.
This standard is a directive standard.
This standard is issued for the first time.
This standard is formulated by the Department of Technology and Finance and the Department of Laws and Regulations and Standards under the Ministry of Ecology and Environment.
Chief drafting organizations of this standard: China Association of Environmental Protection Industry, Beijing Municipal Research Institute of Environmental Protection, Jiangsu Cec-ricm Energy Conservation Technology Co., Ltd., Anguil Environmental Protection Technology (Shanghai) Co., Ltd., Yangzhou Hengtong Environmental Protection Technology Co., Ltd. and ComEnCo (Hangzhou) Environmental Equipment Co., Ltd.
This standard was approved by the Ministry of Ecology and Environment on January 13, 2020.
This standard shall be implemented from January 14, 2020.
The Ministry of Ecology and Environment is responsible for the explanation of this standard.
Technical specifications for industrial organic waste gas treatment by regenerative thermal oxidation
1 Scope
This standard specifies the technical requirements for design, construction, acceptance, operation and maintenance of industrial organic waste gas treatment by regenerative thermal oxidation.
It is applicable to the construction and operation management of industrial organic waste gas treatment by regenerative thermal oxidation, and may be used as reference for environmental impact assessment of construction projects, engineering consultation, design, construction and acceptance of environmental protection facilities, and operation and management after completion.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For undated references, the latest edition of the document referred to applies.
GB 912 Hot-rolled sheets and strips of carbon structural steels and high strength low alloy structural steels
GB 2893 Safety colours
GB 2894 Safety signs and guideline for the use
GB/T 3003 Refractory fibres and the products
GB/T 3077 Alloy structure steels
GB 4053.1 Safety requirements for fixed steel ladders and platform - Part 1: Steel vertical ladders
GB 4053.2 Safety requirements for fixed steel ladders and platform - Part 2: Steel inclined ladders
GB 4053.3 Safety requirements for fixed steel ladders and platform - Part 3: Industrial guardrails and steel platform
GB 7231 Basic identification colors and code indications and safety sign for industrial pipelines
GB/T 11835 Rock wool, slag wool and it's products for thermal insulation
GB 12348 Standard of noise at boundary of industrial enterprises
GB/T 13275 Technical specification for general purposes centrifugal fans
GB/T 13347 Flame arresters for petroleum gas pipeline systems
GB/T 13869 General guide for safety of electric user
GB 15930 Fire dampers for building venting and smoke-venting system
GB/T 16157 Determination of particulates and sampling methods of gaseous pollutants emitted from exhaust gas of stationary source
GB/T 19686 Rock wool thermal insulation products for building applications
GB/T 19839 General specification for industrial oil and gas burners
GB 50016 Code for fire protection design of buildings
GB 50019 Code for design of heating ventilation and air conditioning
GB 50029 Code for design of compressed air station
GB 50051 Code for design of chimneys
GB 50057 Code for design protection of structures against lightning
GB 50058 Specifications for the design of electric systems in places with explosion and fire
GB/T 50087 Code for design of noise control of industrial enterprises
GB 50140 Code for design of extinguisher distribution in buildings
GB 50160 Fire prevention code of petrochemical enterprise design
GB 50187 Code for design of general plan of industrial enterprises
HJ/T 1 Fixing installation for gas measuring and sampling
HJ/T 38 Stationary source emission - Determination of nonmethane hydrocarbons - Gas chromatography
HJ/T 397 Technical specifications for emission monitoring of stationary source
HJ 732 Emission from stationary sources - Sampling of volatile organic compounds - Bags method
HJ 734 Stationary source emission - Determination of volatile organic compounds - Sorbent adsorption and thermal desorption gas chromatography mass spectrometry method
HJ 2000 Technical guidelines for air pollution control projects
AQ 3009 Safety criterion for electrical apparatus in hazardous areas
GBZ 1 Hygienic standards for the design of industrial enterprises
GBZ 2.1 Occupational exposure limits for hazardous agents in the workplace - Part 1: Chemical hazardous agents
GBZ 2.2 Occupational exposure limits for hazardous agents in the workplace - Part 2: Physical agents
HGJ 229 Code for construction and acceptance of anticorrosive engineering or industrial equipment and pipeline
HG/T 20642 Specification for design in refractory fibre linings for chemical industrial furnace
JC/T 2135 Honeycomb ceramic heat accumulator
SGBZ-0805 Construction technology standard for heat preservation of air ducts and components
SH/T 3038 Specification for electric power design in petrochemical plants
Regulations on the administration of construction project environmental protection (revised on July 16, 2017)
Interim measures for the acceptance of environmental protection for the completion of construction projects (GUOHUANGUIHUANPING [2017] No.4)
3 Terms and definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
volatile organic compounds (VOCs)
organic compound that participates in atmospheric photochemical reactions, or is defined in accordance with relevant provisions
In characterizing the overall emissions of VOCs, total volatile organic compounds (in TVOC) and non-methane total hydrocarbons (in NMHC) can be used as pollutant control items based on industry characteristics and environmental management requirements.
3.2
industrial organic waste gas
waste gas containing volatile organic compounds emitted in industrial production process
3.3
regenerative thermal oxidizer (RTO)
device that purifies industrial organic waste gas by combustion and applies heat transfer media for heat exchange and heating up of the waste gas to be treated as well as heat exchange and cooling down of the purified exhaust gas, which is usually composed of divert device, regenerative chamber, combustion chamber and control system, etc.
3.4
heat transfer media
functional materials that realize heat storage and exchange during the operation of the RTO
3.5
divert device
valve or rotary gas distributor that changes the flow direction of waste gas to be treated and purified exhaust gas
3.6
interval time
interval between changes in gas flow direction
3.7
purification efficiency
ratio of mass flow of VOCs processed by the RTO to that of VOCs entering the RTO, in %. The following equation applies:
(1)
where,
Cin——the concentration of pollutants at the inlet of RTO under standard condition, mg/m3;
Cout——the concentration of pollutants at the outlet of RTO under standard condition, mg/m3;
Qin——the dry gas flow at the inlet of RTO under standard condition, m3/h;
Qout——the dry gas flow at the outlet of RTO under standard condition, m3/h.
3.8
thermal energy recovery
ratio of actual heat utilization and maximum available heat of preheated waste gas in the RTO, in % The following equation applies:
(2)
where,
Tcom——the temperature in the combustion chamber of the RTO, ℃;
Tin——the waste gas temperature at the inlet of the RTO, ℃;
Tout——the waste gas temperature at the outlet of the RTO, ℃.
3.9
self-sustaining combustion
combustion process that only depends on the heat released by burning combustibles in waste gas to maintain the normal operation of the RTO at the set temperature
3.10
explosive limit
concentration range where a mixture of combustible gas/vapor and air can explode
3.11
lower explosive limit (LEL)
lowest concentration value of explosive limit
3.12
regenerative chamber cross-section velocity
apparent wind velocity of organic waste gas to be treated passing through the regenerative chamber cross-section under standard condition
4 Pollutants and pollution load
4.1 Design air volume and VOCs design concentration of the engineering shall be comprehensively determined based on the measured values and fully considering the change trend, and can also be determined by analogy with similar engineering.
4.2 Original data such as physical and chemical properties of industrial organic waste gas shall be collected according to engineering design requirements, mainly including the following contents:
a) waste gas air volume (normal value, maximum value and minimum value);
b) waste gas temperature (normal value, maximum value and minimum value);
c) waste gas pressure, humidity and oxygen content;
d) component and concentration of VOCs in waste gas (normal value, maximum value and minimum value);
e) component and concentration of inorganic waste gas in waste gas (normal value, maximum value and minimum value);
f) concentration of particulate matter in waste gas;
g) condition and working system for equipment generating pollutants;
h) waste gas emission mode (continuous, intermittent or fluctuating period).
4.3 The concentration of organic compound entering the RTO shall be less than 25% of the LEL.
4.4 When the organic compound concentration is insufficient to support self-sustaining combustion, it should be properly concentrated before entering the RTO.
4.5 For the waste gas containing mixed organic compound, the control concentration P shall be less than 25% of the lowest value of LEL of the most explosive component or the mixed gas, that is, P
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Pollutants and pollution load
5 General
6 Process design
7 Main process equipment and materials
8 Testing and process control
9 Main auxiliary works
10 Labor safety and occupational health
11 Construction, debugging and acceptance
12 Operation and maintenance
