JB/T 6672.1-2001 This standard is a revision of JB/T 6672-1993 "Technical Conditions for Hot Air Stoves". During the revision, requirements for coal loaders, grates, slag removers, heat exchangers, etc. were added; some technical indicators were adjusted and deleted. This standard specifies the technical requirements, inspection rules, marking, packaging and storage of hot blast stoves. This standard applies to coal-fired hot blast furnaces, including integrated and split types of combustion chamber and heat exchanger. The heating method is indirect heating and the heating medium is air. This standard was first published in 1993 and revised for the first time this time. JB/T 6672.1-2001 Technical conditions for coal-fired hot blast furnace JB/T6672.1-2001 Standard download and decompression password: www.bzxz.net

ICS65.060.99
B90
JB
Machinery Industry Standard of the People's Republic of China
JB/T6672.1-2001
Coal-fired hot blast stove||tt ||Technical conditions
Coal-burning air heaterTechnical specifications2001-06-04 released
China Machinery Industry Federation
Released
Implemented on 2001-10-01||tt ||JB/T6672.1-2001
Foreword
This standard is a revision of JB/T6672-1993 "Technical Conditions for Hot Air Stoves". Compared with JB/T6672--1993, the main technical content of this standard has changed as follows: added requirements for coal loaders, grates, slag removers and heat exchangers; except for steel consumption and heat exchange per megajoule The hot air resistance power consumption index in the hot blast stove; the thermal efficiency index has been adjusted, the service life index and the air tightness index between the air side and the flue gas side have been added; the noise index and overload operation index of the hot blast stove have been adjusted. This standard replaces JB/T6672-1993 from the date of implementation. This standard is proposed and administered by the National Agricultural Machinery Standardization Technical Committee. The units responsible for drafting this standard are: China Academy of Agricultural Mechanization Sciences, China Agricultural Engineering Research and Design Institute, China Agricultural University Zhengzhou Huanghe Boiler Auxiliary Machinery Factory, Shanghai Xinxiang Hot Air Stove Factory. The main drafters of this standard: Lin Jintian, Cui Yuanbo, Liu Desu, Zhao Shumei, Jiang Zhiwei. This standard was first published in 1993 and revised for the first time in June 2001. 1
ScopeWww.bzxZ.net
Mechanical industry standards of the People's Republic of China
Technical conditions
Coal-burning air heater
Coatburning air heater--Technical specifications This standard specifies Technical requirements, inspection rules, marking, packaging and storage of hot blast stoves. JB/T6672.1—2001
replaces IB/T6672-1993
This standard applies to coal-fired hot blast stoves, including the combustion chamber and heat exchanger in integrated and split types, and the heating method is It is heated by air, and the heating medium is air.
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Quoted standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB 15I1999
GB 713—1997
GB/T 985—1988
GB 9969.1—1998
GB 13271—1991
GB/T 50309— 1992
GBJ211—1987
JB/T 1615—1991
JB2880—1981
JB/T 3271---1983
JB/T3726— 1999
JB/T41961999
JB/T6521—1992
3 Technical requirements
3.1 General requirements
Shell and tube heat exchanger||tt| |Steel plates for boilers
Basic forms and dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding General instructions for industrial products
Emission standards for air pollutants in boilers
Industrial furnaces Foundation project quality inspection and assessment standards Industrial boiler masonry project acceptance specifications
Boiler painting and packaging technical conditions
Technical conditions for steel welded atmospheric pressure vessels
Chain grate technical conditions|| tt||General technical conditions for boiler slag removal equipment
Manufacturing technical conditions for transmission reduction boxes for boilers General technical conditions for industrial boiler coal loaders
3.1.1 Hot blast furnaces shall comply with the requirements of this standard and shall be Manufactured with drawings and technical documents approved by prescribed procedures. 3.1.2 All welding of hot blast furnaces shall be in accordance with the regulations of GB/T985 and JB2880. Welds must not have defects such as cracks, pores, arc craters, and unfused slag inclusions, and must not have gas or smoke leakage. 3.1.3 The grate should comply with the requirements of JB/T3271. 3.1.4 The coal loading machine should comply with the regulations of JB/T6521, and the slag remover should comply with the regulations of JB/T3726. 3.1.5 The steel plate material used in the hot blast stove furnace should comply with the regulations of GB713. The furnace masonry should comply with the regulations of GBJ211. China Machinery Industry Federation approved the implementation on 2001-10-01 on 2001-06-04
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JB/T6672.1—2001
3.1.6 Tube and tube heat exchangers should Comply with the regulations of GB151. 3.1.7 The steel plate materials of plate heat exchangers and other types of heat exchangers should not be lower than the requirements specified in GB713. Especially for medium and high temperature hot blast furnaces, the heat resistance and mechanical properties of the heat exchanger steel plates cannot be lower than those specified in relevant standards. 3.1.8 The surface paint of metal parts of hot blast stoves shall comply with the provisions of JB/T1615. 3.2 Overall machine performance
3.2.1 The hot blast stove should have a rated heat exchange output under the specified maximum output hot blast temperature. 3.2.2 The thermal efficiency of the hot blast stove should comply with the requirements in Table 1. Table 1 Thermal efficiency of hot blast stove
Output hot air temperature
℃
≤180
>180-350
>350
To|| tt||1 rival stove, thermal efficiency ≥63%.
Thermal efficiency
%
72
69
≥65
2 When measuring the thermal efficiency of hot blast stoves, the ambient temperature is required to be ≥0℃ (below zero When the ambient temperature is measured, appropriate conversion can be made). 3. It is required that the thermal efficiency attenuation value of the hot blast furnace during the operation cycle does not exceed 5% of the initial installation period. 3.2.3 The hot air outlet of the hot blast stove and the flue gas inlet of the heat exchanger should be equipped with temperature measurement and display devices. For large and medium-sized machine-fired hot blast stoves, an operation control system should be equipped to ensure that the outlet hot air temperature difference is within ±5°C. For hand-fired stoves, the outlet hot air temperature is required to be within ±10°C during stable operation [power is 2093.5MJ/h ( 500,000 kcal/h) or above, it is recommended to use the machine burning method]. 3.2.4 For a hot air stove with rated power, it should be able to work continuously for no less than 2 hours while keeping the speed of the air side channel fan unchanged and increasing the maximum output hot air temperature by 15%. 3.2.5 The main part of the combustion chamber should be guaranteed to have no structural damage within 20,000 hours of operation, and the heat exchanger (including integrated hot blast furnace) should be guaranteed to have no structural and air tightness damage within 10,000 hours of operation. 3.2.6 The pollutant emissions from hot blast stoves should comply with the provisions of 4.1~4.4 in GB13271-1991. The height of the smoke window should comply with the provisions of 4.5 in GB13271-1991.
3.2.7 When the hot blast stove is in full operation, it should be ensured that the noise measured at the operator's working position should not be greater than 85dB (A). 3.2.8 For the safety performance of the hot blast stove, the air tightness test of the air side or flue gas side flow channel of the entire heat exchanger should be carried out using the inflation test method. During the test, an air pressure of 0.02MPa should be used, and the pressure should be continuously pressurized for 0.5h. The air pressure drop value Not more than 5%. 3.3 Assembly quality
3.3.1 The furnace door should be opened and closed flexibly and reliably. After closing, the furnace door and the furnace mouth are close to each other, and the film between them should not be greater than 0.6mm. 3.3.2 The grate shall comply with the relevant assembly quality requirements of JB/T3271, and the transmission reduction gearbox shall comply with the provisions of JB/T4196. 3.3.3 Supporting auxiliary machines and accessories must be verified to be qualified before assembly. 3.3.4 After assembly and welding, the heat exchanger components should comply with the welding sealing performance requirements of JB2880. There must be no connection between the flue gas side and the air side or leakage of gas or smoke.
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JB/T6672.1—2001
After installation, the air tightness between the air side and flue gas side flow channels of the hot blast stove should be tested using the inflation inspection method. 3.4 On-site installation and masonry requirements
should comply with the regulations of GBJ211.
4 Inspection Rules
4.1 Factory Inspection
4.1.1 Each hot blast stove should be inspected according to the technical requirements of the relevant items in 3.1 and 3.3. When the inspection results of each item meet the requirements, a certificate of conformity can be issued and allowed to leave the factory.
4.1.2 Users have the right to check product quality according to the factory inspection items of this standard. 4.1.3. Under the condition that the user operates and stores the product in accordance with the usage requirements stipulated in the product instruction manual, if the mold is damaged or cannot operate normally due to poor manufacturing quality within one year, the manufacturer shall be responsible for free repair or replacement. 4.2 On-site installation and acceptance
4.2.1 For small quick-installation hot blast stoves, the integral installation should be carried out directly on site according to user requirements and inspected according to 3.2 (except for life requirements)
4.2.2 For large bulk hot blast stoves, on-site installation should be carried out in accordance with the relevant provisions of 3.1, 3.3 and 3.4, and inspection should be carried out according to 3.2 after installation (except for life requirements).
4.3 Type inspection
4.3.1 Type inspection means all inspections according to the requirements of this standard. 4.3.2 Type inspection should be carried out for any of the following situations: a) Trial type identification of new products or old products transferred to the factory for production: b) At least once every two years during normal production; c) When the structure, When there are major changes in the main materials and processes that will affect the performance; d) When the product is resumed after a long-term suspension of production: e) When the factory inspection results are significantly different from the last type inspection: f) The national quality supervision agency proposes to conduct type inspection When inspection is required. 5 Marking, Packaging and Storage
5.1 Mark
Each hot blast stove should be equipped with a fixed metal sign in a conspicuous position in front of the stove, the content of which should include: a) product name and model;|| tt||b) Main technical parameters of the product:
c) Manufacturing date and product number:
d) Name of the manufacturer.
5.2 Packaging
5.2.1 The packaging of this product is determined by negotiation between the supplier and the buyer. 5.2.2 Each hot blast stove should come with the following documents: a) Hot blast stove certificate;

d) Spare parts list and packing list.
5.3 Storage
JB/T6672.12001
When storing this product, do not come into contact with corrosive gases or liquids. If stored in the open air, rainproof facilities should be provided.
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