JB/T 10356-2002 Technical requirements for fluidized bed combustion equipment
Some standard content:
1CS27.060
Machinery Industry Standard of the People's Republic of China
JBT10356—2002
Technical conditions for fluidized bed combustion equipment
Specification for burning eqaiprmients of fuidized fed2002-07-18Promulgated
Implementation on 2002-12-01
Promulgated by the State Economic and Trade Commission of the People's Republic of ChinaForeword
2 Normative references
4 Technical requirements
5 System design
6 Painting, coating, penetration and protection,
3 Performance test
Inspection and acceptance
JB/T109562002
JB/T10358—2002
This standard is proposed by the China Machinery Industry Federation. Foreword
This standard is formulated by the National Technical Committee for Standardization of Boiler Furnaces (CSBTS/TC73) [I. The originating units of this standard are: Shanghai Jiaotong University. Zinan Boiler Group Co., Ltd., Shanghai Boiler Co., Ltd., Beijing Kangpei Combustion Equipment Complete Set Co., Ltd.
The main drafters of this standard are: Chu Ziping, Gu Guochang, Ni Junxian, Di Naiyue. Introduction
JB/T10356—2002
This standard is formulated on the basis of summarizing the experience of more than 30 years of development of fluidized bed furnaces in my country and absorbing the advanced technology introduced from abroad. It aims to improve the combustion efficiency and protect the environment of fluidized bed combustion equipment. m
1 Scope
Technical conditions for fluidized bed combustion equipment
JB/T10356—2002
This standard stipulates This standard specifies the technical requirements for the design, inspection, calibration, packaging, installation, trial inspection and purchase of fluidized bed combustion equipment for thermal power plants. This standard applies to fluidized bed combustion equipment for steam boilers with a combustion capacity of 6t/h--[30MW] and hot water boilers with a heating capacity of 4.2MW~116MW. For fluidized bed combustion equipment for steam boilers (hot water boilers) with other evaporation capacities (heating capacities), reference can be made to this standard. 2 Normative referenced documents
The clauses in the following documents become clauses of this standard through the use of this standard. For any dated referenced document, all subsequent amendments (excluding dated content) or unsubscribed versions are not applicable to this standard. However, the parties to an agreement based on this standard may study whether the latest versions of these documents can be used. For any undated referenced document, its latest version shall apply to this standard: GB13223 Thermal Power Factory air pollutant emission standard CB[3271 Saw furnace air pollutant non-governmental standard JB/T1615 Boiler paint and packaging technical record 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Fluidized bed uidized bed
Fluidized bed flnidized bed
Under the action of fluidized medium, the particle surface of the figure is similar to some macroscopic characteristics of fluid, the design is composed of a chamber, an air distribution bottle and a material bed layer. 3.2
Fluidized bed combustion equipment burmingeqpmentorfluidizedbed uses air as a fluidizing medium to ignite and burn the fuel in a fluidized state. 3.3
: Its composition includes an ignition device, a feeder and a fan chamber, air distribution, exhaust and cooling device, for the ring-type chemical bed, there are also special air distribution devices for separation and return. AfrdistribuonWww.bzxZ.net
is used to send the gas to the micro-chemical bath with certain requirements: the commonly used air distribution devices are wind-type and dense-hole plate. Circulation ratio circulationnaio
is the ratio of the circulating material volume to the fuel volume. Grading separation efficiency gredipngseparatingefnclency is the ratio of the weight of the particles separated in the separator to the maximum weight of the particles entering the separator for solid particles of a certain size range (grading). Snlid-gasseparator
uses the combination of gravity, inertia, centrifugal force and other forces to separate the solid particles from the flue gas flow. JB/T10358-2002
Return partelereturnvalvr
is the amount of solid particles separated to be sent back to the furnace. Note: the side channel of the material is non-mechanical (flow sealing valve) 3.8
Inner ring erciron
The solid particles flow in the furnace film. 3.9
Outer ouwarddrcuato
The solid particles that leave the furnace are carried away by the flue gas, separated from the flue gas system by the separator, and the particles formed in the process of returning to the furnace flow in a circular manner,
The air used as the fluidizing medium passes through the fluidized bed air section when the fluidized bed air section is superficlalarelocityoffluidiedbed. The fluidizing air section flow velocity is referred to as the fluidizing air velocity, 3.11
Fluidized bed combustion temperature cornbusdoateraperatureoflaidixcdbed fuel is the temperature of the drying gas in the bed when it is burned in the fluidized bed. 4.1 Fluidized bed combustion equipment shall be designed and manufactured in accordance with the technical agreement signed between the user and the manufacturer. 4.2 When the fluidized bed combustion equipment meets the requirements of 4.1 and the related auxiliary equipment and systems are put into normal operation, it shall ensure that: 1) the design and operation requirements of the furnace output or heating and parameters are met and the combustion requirements can be fully operated for a long time b) the combustion efficiency is not limited to the guaranteed value specified in the technical agreement. t) The exhaust efficiency of boiler smoke, smoke blackness and gaseous pollutants shall comply with the provisions of Gm13271 or (IB13223. 4.3 Design value of the flow velocity (fluidizing wind speed) of the empty section of the coal-fired fluidized bed: For bubbling fluidized bed without flying back, in order to reduce the loss of the machine domain, the cold wind speed is controlled at 0.7mVs~0.9m/s: when there is ash combustible, it should be controlled at 0.8m/s--1.1m/s. For circulating fluidized bed, the cold wind speed should be controlled at 0.9m/--2.0m/%s. For fluidized bed boilers burning dusty fuels, such as petroleum coke, the physical properties of which should be calculated by aerodynamics to obtain the corresponding test wind speed.
4.4 Fluidized bed combustion temperature (bed temperature) The design value varies with the type of fuel and desulfurization and should be controlled at 90% during desulfurization. : The following: The temperature is controlled at 1K00 or below when not deacetylated, and it must be at least 200℃ lower than the melting point DT (). 4.5 The selection of the circulating rate setting value will affect the heating rate and output of the circulating fluidized bed boiler. The calorific value, decomposition and thermal stability of the fuel should be considered. The solid particle screening grouping, fluidized air, the arrangement of pipes, the separation efficiency of each separate separator, the combustion efficiency and the desulfurization efficiency should also be considered. For the wide-band coal separation currently used in my country (usually 10mm-10rm), 340 is used for external circulation. For the reduction or separation of high-quality coal (or stone coke), quartz is used as the circulating material for external circulation. It is advisable to use more than 20. Regardless of the water-cooled or non-water-cooled structure, the AB distribution device should be well sealed and able to withstand the wind pressure and the weight of the bed material. 4.7 Air distribution device The wind whistle should be made of heat-resistant and peel-resistant materials. The type and opening of the wind nozzle should meet the requirements of solid particle fluidization and prevention of particle backflow. A refractory wear layer should be laid between the air hole and the air distribution plate to reinforce the air phase and protect the air distribution plate. 4.8 When the air plate and the water-cooled wax of the furnace barrier are connected by a sliding seat, there should be a good thermal expansion structure and maintain good sealing. 4.9 The layout and support of all pipelines connected to the furnace body, such as the secondary air duct, return pipe, ignition air duct, feed pipe and other pipelines, should consider the compensation of steam energy: the reverse connection of the two ends of the cyclone separator installed at the outlet of the chamber with the furnace body should consider the mutual expansion and maintain good sealing.
JB/T10956—2002
4.10 The layout of the left fire hole should be based on the fuel combustion situation and the return of fly ash. The dense phase area above the ignition burner air distribution plate shall be equipped with observation and operation platforms.
4.11 The layout of the manhole door shall be convenient for inspection personnel to enter the wind room, furnace phase area and separation device, and a platform for personnel to exit and enter shall be provided. 4.12 The separator shall be designed according to the required classification and separation efficiency, and the appropriate type shall be selected to meet the requirements of material circulation, combustion efficiency, degassing efficiency and gas follow-up resistance. For small boilers limited by the layout space, an internal circulation system can be adopted; for boilers with layout space, an external circulation system or two-stage (or multi-stage) separation can be adopted. 4.13 The hopper can be equipped with non-mechanical valves, such as type, U-type, J-type, H-type valves, etc.: the solid color particles are fluidized through the return air (including dynamic air and transmission air) and sent back to the membrane. The return point varies with the coal and fly ash particle size. For fuels that are difficult to burn out and large fly ash particles, such as limestone particles, the return point should be placed closer to the air distribution plate. 4.14. The water-cooled air distribution device can be equipped with an under-bed ignition burner, whose flame shall not enter the room. Only the hot gas mixed with the primary air can heat the bed material to realize fluidized ignition. Non-water-cooled air distribution devices can be equipped with hot ignition on the bed. If the combustion is violent, the flame of the burner is required to be large and penetrating.
4.15 Parts that are easily washed by solid particles, such as wind turbines, furnace walls in dense areas, separator inner surfaces, buried pipes and water-cooled wall pipes facing air sinking, should be made of heat-resistant and wear-resistant materials or adopt wear-resistant structures, and their service life should be not less than one full cycle. 4.1B In order to make the discharged ash slag comprehensive utilization, air-cooled, water-cooled or air-cooled combined cooling slag coolers can be selected. The slag discharge temperature of the cooler can be determined according to the process requirements: to ensure the reliability of the removal of the falling screen, it should be below 250℃. 4.17 For fuels with high sulfur content, limestone should be used for desulfurization according to the requirements of B13271 or GB13223 for the improvement of sulfur dioxide emission index. In the case of or with particle size of 0mm~2mm, the proportion of particles larger than 1mm is less than 10%. 4.1B The water-cooled wall tubes of the furnace grease replacement and separator should ensure reliable water circulation. The wax end temperature of the membrane wall fin tube should be lower than the allowable temperature of the steel. 5 System design
5.1 The system design should be coordinated with the design of the fluidized bed combustion equipment and the requirements of desulfurization. 5.2 The equipment in the fuel preparation system, its fuel particle size range and screening composition requirements should be reasonably selected according to the fuel characteristics specified in the boiler technical agreement, and meet the requirements of fluidized bed combustion. The coal feeder of the refining pipe should be anti-blocking and the throttling should be active. 5.3 The equipment in the ash preparation system, the ash or ash particle size specification and screening composition requirements should be reasonably selected according to the ash characteristics specified in the boiler technical specifications, and meet the requirements of fluidized bed desulfurization. 5.4 The selection of auxiliary equipment should be matched with the end-of-burning equipment and desulfurization equipment, reliable, and the basis for calculation should be provided to meet the requirements of safe combustion and desulfurization under different boiler load parameters. 5.5 The slag cooling pipe and cold connector configured in the fluidized bed combustion system can flexibly carry out ash and slag discharge, control the slag discharge volume and maintain the separation of bed materials.
5.6 The maintenance of fluidized bed combustion equipment should be appropriately selected according to the capacity and structural characteristics of the steel furnace. The following protective devices should also be appropriately selected: a) Fluidized bed combustion over-temperature alarm protection (to prevent slagging of the entire bed): b) Fluidized bed temperature low limit alarm (to prevent flameout): C) Furnace positive and negative pressure protection:
Draft and induced draft fan trip protection:
e) Emergency stop button for moving firewood:
) Separator and return material over-temperature alarm protection, 5.7 Fluidized bed equipment is equipped with instruments to monitor the following parameters: a) Dense phase flue gas temperature:
h: Furnace cavity outlet gas temperature:
c) Import and export difference:
) Dense phase layer pressure difference:
JB/T10356—2002
)—, Secondary air:
Furnace outlet or Ministry of transport gas and other nuclear quantities.
6 Paint, packaging, transportation and storage
6.1 Fluidized bed combustion equipment should be painted and packaged according to JBT1615 or order form. 6.2 When shipping thin-walled structural parts such as expansion joints, non-water-cooled air chambers, air ducts, separators, etc., necessary packaging and reinforcement measures should be taken according to the rigidity and installation requirements of the H structure to ensure that the structural parts are not damaged. 6.3 The transportation requirements of the chemical bed combustion equipment shall be implemented in accordance with the provisions of the order contract. 6.4 After the equipment arrives at the installation site, the requirements proposed by the manufacturer shall be kept. 7 Installation
7.1 The installation of chemical bed combustion equipment shall be approved by the main business department and undertaken by the installation unit with corresponding strength. 7.2 The relevant regulations, drawings, technical documents, installation instructions, etc. shall be submitted for installation and construction. When the equipment needs to be modified during installation, the consent of the design and manufacturing units must be obtained. 7. The combustion hall, separation and its sealing structure and expansion structure shall have good sealing performance. 7.4 The technical documents and construction quality certification materials delivered to the installation site shall be handed over to the user unit and stored in the boiler technical file after the installation is completed. 8 Performance test
8.1 Before the fluidized bed combustion boiler is put into operation, the test unit shall conduct a cold test to provide necessary data for hot operation. 8.2 Cold test includes:
a) Determination of air volume, air pressure and characteristic curve of the blower: b) Determination of the resistance of the air distribution plate and the critical fluidized air plate: ) Air distribution uniformity test:
d) Coal quantity calibration of the coal feeder:
e) Desulfurization dosage calibration of the feeder
9 Inspection and acceptance
9.1 Fluidized bed combustion equipment can only be delivered after passing the inspection of the manufacturer's inspection department. 9.2 The on-site inspection and acceptance of the equipment shall be carried out according to the product list. 9.3 The purchased parts of the matching scheme shall have the quality certificate of the purchased parts, and the manufacturer of fluidized bed combustion equipment shall be responsible for the quality of the purchased parts.
9.4 During the warranty period, the user can conduct acceptance inspection according to the requirements of this standard and the relevant requirements of the fluidized bed combustion equipment stipulated in the order return.1 Before the fluidized bed combustion boiler is put into operation, the test unit shall conduct a cold test to provide necessary data for hot operation. 8.2 Cold test includes:
a) Determination of air volume, air pressure and characteristic curve of the blower: b) Determination of the resistance of the air distribution plate and the material layer, and determination of the critical fluidized air plate: ) Air distribution uniformity test:
d) Coal quantity calibration of the coal feeder:
e) Desulfurization dosage calibration of the system feeder
9 Inspection and acceptance
9.1 Fluidized bed combustion equipment can only be delivered after passing the inspection of the manufacturer's inspection department. 9.2 The on-site inspection and acceptance of the equipment shall be carried out according to the product list. 9.3 The purchased parts of the matching scheme shall have the quality certificate of the purchased parts, and the manufacturer of fluidized bed combustion equipment shall be responsible for the quality of the purchased parts.
9.4 During the warranty period, the user can conduct acceptance inspection according to the requirements of this standard and the relevant requirements of the fluidized bed combustion equipment stipulated in the order return.1 Before the fluidized bed combustion boiler is put into operation, the test unit shall conduct a cold test to provide necessary data for hot operation. 8.2 Cold test includes:
a) Determination of air volume, air pressure and characteristic curve of the blower: b) Determination of the resistance of the air distribution plate and the material layer, and determination of the critical fluidized air plate: ) Air distribution uniformity test:
d) Coal quantity calibration of the coal feeder:
e) Desulfurization dosage calibration of the system feeder
9 Inspection and acceptance
9.1 Fluidized bed combustion equipment can only be delivered after passing the inspection of the manufacturer's inspection department. 9.2 The on-site inspection and acceptance of the equipment shall be carried out according to the product list. 9.3 The purchased parts of the matching scheme shall have the quality certificate of the purchased parts, and the manufacturer of fluidized bed combustion equipment shall be responsible for the quality of the purchased parts.
9.4 During the warranty period, the user can conduct acceptance inspection according to the requirements of this standard and the relevant requirements of the fluidized bed combustion equipment stipulated in the order return.
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