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GB/T 36699-2018 English PDF (GBT36699-2018)

GB/T 36699-2018 English PDF (GBT36699-2018)

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GB/T 36699-2018: Specification for liquid fuels and gaseous fuels burners of boilers

This standard specifies the technical requirements for the classification and model preparation, composition and basic configuration, basic requirements, performance requirements, design and manufacture, inspection, testing and detection, technical documentation and identification, packaging, transportation and storage, installation, commissioning, use of liquid-fuels and gaseous-fuels burners of boilers. This standard applies to forced draught burners and natural ventilation burners which use the liquid-fuels and gaseous-fuels for boilers. Power plant boiler startup burners, various industrial furnaces, industrial heating furnaces, burners for other purposes may make reference to this standard.
GB/T 36699-2018
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 27.060.30
J 98
Specification for liquid-fuels and
gaseous-fuels burners of boilers
ISSUED ON. SEPTEMBER 17, 2018
IMPLEMENTED ON. APRIL 01, 2019
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 8
4 Classification and preparation of model ... 13
5 Composition and basic configuration ... 15
6 Basic requirements ... 19
7 Performance requirements ... 20
8 Design and manufacturing ... 29
9 Special requirements ... 36
10 Inspection, testing and detection ... 38
11 Technical documents and markings ... 41
12 Packaging, transportation and storage ... 42
13 Installation, commissioning and use ... 43
Appendix A (Normative) Basic configuration of burner ... 47
Appendix B (Normative) Requirements for arrangement of safety shut-off valve of liquid-fuel burner ... 53
Appendix C (Normative) Opening requirements of safety shut-off valve of main gas ... 59
Appendix D (Normative) Measurement and correction of emissions ... 63
Appendix E (Informative) Measurement of flue-gas?€?s blackness ... 67
Appendix F (Normative) Control timing diagram of liquid-fuel and gaseous-fuel burner ... 69
Appendix G (Normative) Conditions of type test ... 70
Appendix H (Normative) Type test, exit-factory inspection, post-modification inspection, in-use detection items ... 80
Appendix I (Normative) Type test, exit-factory inspection, in-use test method ... 81
Specification for liquid-fuels and
gaseous-fuels burners of boilers
1 Scope
This standard specifies the technical requirements for the classification and model preparation, composition and basic configuration, basic requirements, performance requirements, design and manufacture, inspection, testing and detection, technical documentation and identification, packaging, transportation and storage, installation, commissioning, use of liquid-fuels and gaseous-fuels burners of boilers.
This standard applies to forced draught burners and natural ventilation burners which use the liquid-fuels and gaseous-fuels for boilers. Power plant boiler?€?s startup burners, various industrial furnaces, industrial heating furnaces, burners for other purposes may make reference to this standard.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.
GB/T 1184 Geometrical tolerancing - Geometrical tolerance for features
without individual tolerance indications
GB/T 1804 General tolerances - Tolerances for linear and angular
dimensions without individual tolerance indications
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 6414 Castings - Dimensional tolerances and geometrical tolerances
and machining allowances
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 13611 Classification and essential property of city gas
GB/T 14486-2008 Dimensional tolerances for molded plastic parts
GB/T 14536.1 Automatic electrical controls for household and similar use - Part 1. General requirements
GB/T 14536.6 Automatic electrical controls for household and similar use - Particular requirements for automatic control systems for burners
GB/T 14536.7 Automatic electrical controls for household and similar use - Special requirements for pressure-sensitive electrical automatic controllers, including mechanical requirements
GB 16663 Alcohol base liquid-fuel
GB 18613 Minimum allowable values of energy efficiency and energy
efficiency grades for small and medium three-phase asynchronous motors
GB/T 19212.4 Safety of transformers, reactors, power supply units and
combinations thereof - Part 4. Particular requirements and tests for gas and oil burners, ignition transformers
GB 19517 National safety technical code for electric equipments
GB/T 19804 Welding - General tolerances for welded constructions -
Dimensions for lengths and angles - Shape and position
GB/T 24146 Rubber hoses and hose assemblies for use in oil burners -
Specification
GB 25989 Fuel oils for burners
GB/T 30597 General requirements of safety and control devices for gas
burners and gas-burning appliances
JB/T 10562 Technical specification for general purposes axial fans
JB/T 10563 Technical specification for general purposes centrifugal fans TSG G0001 Boiler safety technical supervision administration regulation ISO 23551-1 Safety and control devices for gas burners and gas-burning
applications - Particular requirements - Part 1. Automatic and semi-
automatic valves
ISO 23551-2 Safety and control devices for gas burners and gas-burning
appliances - Particular requirements - Part 2. Pressure regulators
ISO 23551-3 Safety and control devices for gas burners and gas-burning
appliances - Particular requirements - Part 3. Gas/air ratio controls,
pneumatic type
Gaseous-fuel
A gaseous combustible substance that generates heat when burned.
Note. The gaseous-fuels referred to in this standard include natural gas, liquefied petroleum gas, coke-oven gas, mixed city gas, bio-gas, low-
calorific-value gas, combustible industrial tail-gas, hydrogen gas, methane. 3.6
Biomass pyrolysis gas
A low-calorific-value combustible gas produced by a pyrolysis process of a biomass solid fuel.
3.7
Dual fuel burner
A burner capable of burning liquid and/or gaseous-fuel simultaneously or separately.
3.8
Surface burner
A fully-premixed burner in which fuel is burned on the surface of a porous medium.
3.9
Heat output
The amount of heat as released by the burner per unit time.
Note. The heat output referred to in this standard is based on the net calorific value of the fuel, in the unit of kilowatt (kW).
3.10
Nominal heat output
The heat as released by the burner during continuous combustion per unit time under rated conditions.
Note. The nominal heat output is expressed in QF, in kilowatts (kW).
3.11
Maximum heat output
Flame detector device
A device for monitoring the presence of a flame.
3.19
Main flame
A flame that burns on the main combustion nozzle.
3.20
Ignition flame
The flame that is first ignited to ignite the main flame.
3.21
Controlled shutdown
When the burner does not need to supply heat, the process of shut-down by automatically cutting off the fuel supply.
3.22
Safety shutdown
After the safety device responds or the automatic control system fails, the process of shut-down by automatically cutting off the fuel supply.
3.23
Pre-ignition time
The time interval between the startup of discharge of the ignition electrode and the opening of the fuel valve.
Note. The pre-ignition time is expressed in ty, in seconds (s).
3.24
Ignition safety time
The safe time for the burner?€?s ignition flame to ignite, that is, when the ignition flame is not formed, the interval between the time when the ignition fuel control valve gets the opening signal and the time when it gets the closing signal.
Note. The ignition safety time is expressed in ts, in seconds (s).
The ratio of the actual amount of supplied air to the amount of theoretical air. 3.31
Working diagram
A curve which represents the relationship between the combustion
chamber?€?s pressure and the heat output, whose enveloped zone is the
working range as designed for the burner.
3.32
Original emission
Emission concentration of combustion products without any treatment
determined under type test conditions.
Note. The original emission concentration is converted according to the oxygen content of the flue-gas of 3.5%, in milligrams per cubic meter
(mg/m3).
3.33
In service burner modification
The behavior of making major changes to the type of fuel, internal structure, combustion method of the burner.
4 Classification and preparation of model
4.1 Classification
The burners are divided according to the type of fuel used, the mode of adjustment, the mode of air supply, the method of atomization, the type of structure, as follows.
a) According to the type of fuel used, it is divided into liquid-fuel burners, gaseous-fuel burners, dual (multi) fuel burners;
b) According to the heat output?€?s control mode, it is divided into single-stage control burner, multi-stage control burner, modulating control burner;
c) According to the air supply mode of combustion air, it is divided into forced draught burners and natural ventilation burners;
d) According to the atomization mode of the liquid-fuel, the liquid-fuel burner is divided into mechanical-atomization burner and medium-atomization
burner;
a) A single-stage control burner shall be provided with one safety shut-off valve, as shown in Figure B.1;
b) A two and multi-stage control burner shall be provided with a safety shut- off valve for each nozzle, as shown in Figure B.2;
c) The burner which uses the return nozzle shall be provided with a safety shut-off valve on the fuel supply pipeline and the fuel return pipeline, which are linked. It may use a nozzle shut-off valve to replace the safety shut-off valve, as shown in Figure B.3 and Figure B.4.
5.2.2.2 For liquid-fuel burners which have a nominal heat output > 400 kW, it shall install two automatic safety shut-off valves in serial connection on the fuel pipeline. The upstream safety shut-off valve shall be of the quick-closing type, the downstream safety shut-off valve may also be used as the flow control valve simultaneously. The closing time shall not exceed 5 s. The automatic safety shut-off valve shall be arranged in accordance with the requirements of Figure B.5 ~ Figure B.7. The specific requirements are as follows.
a) The two and multi-stage control burners shall be equipped with two safety shut-off valves for each nozzle, as shown in Figure B.5;
b) Burners which use return nozzles shall be fitted with two safety shut-off valves, respectively, on the fuel supply pipeline and the fuel return pipeline. One of the safety shut-off valves may be replaced by a nozzle shut-off
valve, which shall comply with the requirements of ISO 23553-1. The
return pipeline shall be fitted with a pressure monitoring device, as shown in Figure B.6 and Figure B.7. The safety shut-off valve shall be linked. When the safety shut-off valve on the fuel supply pipeline is opened, the safety shut-off valve on the return pipeline cannot be closed. It can be realized by the following two methods.
1) A mechanical connection controlled by the actuator between the safety cut-off valve on the supply pipeline and the safety shut-off valve on the return pipeline;
2) An electrical or pneumatic interlocking between the safety cut-off valve on the supply pipeline and the safety shut-off valve on the return pipeline. If the burner has a circulating preheating nozzle head, it shall make the fuel circulate to the nozzle head. When there is only one nozzle shut-off valve, the nozzle shut-off valve shall meet the requirements of ISO 23553-1, otherwise it shall take other measures to ensure that the fuel does not ejected during circulated heating. At the same time, it shall also ensure that the return pressure will not open the nozzle shut-off valve.
5.2.3 Automatic safety shut-off valve for gaseous-fuel
A gas leak detector which has a nominal heat output greater than 1200 kW shall be provided with a valve leak detector.
6 Basic requirements
6.1 Declaration of conformity
This standard has been developed in accordance with the basic safety
requirements for the liquid-fuel burner and the gaseous-fuel burner in TSG G0001.
6.2 Manufacturing organization
The manufacturing organization of the burner shall meet the following
conditions simultaneously.
a) The production equipment and production sites that are compatible with the scale of production;
b) The basic test and detecting device of the burner;
c) The technicians and professional commissioning personnel related to the thermal energy and electrical control trades;
d) The sound quality management system and corresponding management
policies.
6.3 Professionals
Professionals involved in such trades as manufacture, installation,
commissioning, repair, modification of burners shall have expertise in thermal energy and electrical control, be familiar with the operation and commissioning process.
6.4 Type test
6.4.1 Burners shall be subjected to the type test under one of the following conditions.
a) A newly-designed burner;
b) Where the fuel types used by the burner or the structure and
programmable control methods of burner change;
c) The last type test of the burner is more than 4 years.
6.4.2 The type test shall be carried out by an inspection and testing institute which has the type test qualification of burner as approved by the State Special 7.1.6 Ignition of ignition burner
7.1.6.1 The ignition of the liquid-fuel shall meet the following requirements. a) When the ignition burner is spark-ignited, if the interval between the time when the fuel cut-off valve of the ignition burner is opened and the time when the fuel cut-off valve of the main burner exceeds 5 s, it shall monitor the ignition flame;
b) When the flame of the liquid-fuel is not ignited, if the main fuel supply can be cut off during the safety time and the ignition valve can be closed at same time, it is not necessary to separately monitor the ignition flame during the pre-ignition time of 5 s, in which case the ignition fuel can be supplied for up to 10 s (5 s is the pre-ignition time, 5 s is the safety time). 7.1.6.2 The ignition of gaseous-fuel shall meet the following requirements. a) Except for valve leak detection, the ignition gas valve shall not be energized before the spark ignition device or other ignition device is
energized;
b) For burners which has a heat output greater than or equal to 120 kW, the ignition gas is drawn from between the two main gas safety shut-off valves. Before startup, the downstream main gas safety shut-off valve shall not be energized;
c) When the ignition gas is controlled by the position of the downstream main gas safety shut-off valve, it shall install a pressure control device to make the ignition gas amount meet the requirements of this standard,
meanwhile the gas-pressure shall be greater than the system?€?s resistance; d) In the event of an ignition flame?€?s failure, the system shall behave as specified in 7.1.8.
7.1.7 Startup of main burner
7.1.7.1 Direct startup
When igniting the main flame directly, it shall comply with the following requirements.
a) When using spark ignition, the ignition source shall not be energized before the end of the purge, and it shall be de-energized before the end of the safety time;
b) When using a hot-surface ignition device, the ignition device shall be energized first, the main gas valve can be opened after the temperature of the ignition source reaches the ignition temperature of the gas.
7.1.9.2 Safety shutdown
During startup or operation, the burner shall be safely shut-down in any of the following situations.
a) The power supply or dynamic gas source is interrupted or abnormal;
b) The gas-pressure is lower than the set value;
c) Liquid-fuel burners exhibit atomization medium failure, low fuel pressure, low fuel temperature, high return pressure of burner which has return
nozzle, low rotor speed when using rotary atomizer, etc.
7.1.9.3 Interlock protection
During startup and operation, it shall be safely shut-down and interlock- protected in any of the following conditions (except as listed in 7.1.8). a) Fault signal of flame;
b) High-voltage protection signal of gas;
c) Fault signal of air-flow;
d) Abnormal position verification for a burner with position verification; e) Alarm signal of gas valve leak detection;
f) Temperature overrun signal of liquid-fuel;
g) Overrun of such parameters as pressure, water-level, temperature as
related to the boiler.
7.2 Electrical safety
7.2.1 Electrical equipment?€?s safety shall meet the requirements of GB 19517, the electrical safety shall be implemented in the order of direct safety measures, indirect safety measures, suggestive safety measures.
7.2.2 In order to ensure the normal operation and prevent the danger caused by the direct action of the current, the electrical equipment shall have sufficient insulation resistance, dielectric strength, heat resistance, moisture resistance, anti-fouling, flame retardancy, tracking resistance.
7.2.3 All parts that may be hazardous due to operating voltage, fault current, leakage current or the like shall have sufficient electric clearance and creepage distance.
7.2.4 Electrical equipment shall have sufficient mechanical strength, good a) The flame diameter and length of the burner shall be matched to the
furnace size of the boiler;
b) The nominal heat output of the burner shall be matched to the rated output of the boiler;
c) It should use the online oxygen monitoring, to improve the control
accuracy of air-fuel ratio.
8 Design and manufacturing
8.1 General requirements
The burner shall be designed to meet the following requirements.
a) The materials used in each component shall be capable of withstanding the mechanical load, thermal, chemical load in the working environment; b) The design of each component structure shall ensure the safe and
economic operation of the burner, without any occurrence of instability, deformation or cracking;
c) For the burner which has a flame observation hole, the structure design of the flame observation hole?€?s fitting shall have sufficient strength and reliable sealing;
d) The components exposed to corrosive fuels shall be corrosion resistant; e) The burners used in cold environments shall take the necessary antifreeze measures;
f) When burning explosive gaseous-fuels, all electrical components shall be installed in accordance with the provisions of the hazard zoning of relevant equipment, with corresponding explosion-proof grades;
g) The burner and fuel pipelines shall be provided with the measuring-points for fuel supply pressure, fuel control pressure, fuel pressure at the burner?€?s head, air pressure.
8.2 Connection and sealing
The connection between the burner?€?s components and between the burner and the boiler shall comply with the following requirements.
a) The burner shall be securely fixed to the boiler. It shall provide a sealing gasket with thermal insulation function between the burner and the boiler; b) Components which require regular maintenance shall be easy to
c) The parameter setting of the air monitoring device shall be matched to the minimum heat output. The limit of volume content of carbon monoxide in
the combustion products shall not exceed 1%.
8.3.4 Air-flow control device
The air-flow control device shall meet the following require...

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