CN212456820U - Air distribution plate structure for biomass boiler and boiler system - Google Patents
Air distribution plate structure for biomass boiler and boiler system Download PDFInfo
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- CN212456820U CN212456820U CN202022043169.9U CN202022043169U CN212456820U CN 212456820 U CN212456820 U CN 212456820U CN 202022043169 U CN202022043169 U CN 202022043169U CN 212456820 U CN212456820 U CN 212456820U
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Abstract
The utility model discloses an air distribution plate structure and a boiler system for a biomass boiler, which comprises an air distribution plate upper plate, a resistance pipe and an air distribution plate lower plate; the upper plate and the lower plate of the air distribution plate are uniformly provided with through holes, the upper end of the resistance pipe is connected with the upper plate of the air distribution plate, the lower end of the resistance pipe is connected with the lower plate of the air distribution plate, the pipe wall of the resistance pipe is provided with a recycling hole, and the resistance pipe is respectively communicated with the through holes of the upper plate and the lower plate of the air distribution plate; the air distribution plate of the utility model sets a certain resistance through the Venturi tube, which is convenient for the fluidized air to be uniformly distributed, and is helpful for improving the combustion efficiency, and the structure of the Venturi tube is convenient for discharging foreign matters in the boiler, is helpful for improving the combustion stability of the boiler, and prolongs the operation period; based on among the boiler system of grid plate, certain resistance has been set for through venturi to the grid plate, and the fluidization wind evenly distributed of being convenient for helps improving combustion efficiency, sets up flue gas recirculation branch road intercommunication grid plate in the draught fan export moreover.
Description
Technical Field
The utility model belongs to the technical field of the living beings are utilized, concretely relates to a grid plate structure and boiler system for biomass boiler.
Background
The biomass mainly refers to lignocellulose, namely lignin for short, agricultural product processing industry leftovers, agricultural and forestry wastes, livestock and poultry manure and wastes in the animal husbandry production process except grains and fruits in the agricultural and forestry production process. The biomass energy is an important component of renewable energy, and the efficient development and utilization of the biomass energy play a very positive role in solving the problems of energy and ecological environment.
At present, a biomass boiler mainly comprises a grate furnace and a fluidized bed, the biomass grate furnace has low overall combustion efficiency, poor combustion stability and high original pollutant emission; the fluidized bed biomass boiler has the problems that foreign matters are difficult to discharge, the system reliability is poor, and the operation period is short.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a grid plate structure and boiler system for biomass boiler, this system have arrange the sediment convenience, the cycle length is long, the original emission of pollutant is low, advantages such as system reliability height.
In order to achieve the purpose, the utility model adopts the technical scheme that the air distribution plate structure for the biomass boiler comprises an upper air distribution plate, a resistance pipe and a lower air distribution plate; evenly set up the through-hole on air distributor upper plate and the air distributor hypoplastron, the air distributor upper plate is connected to the upper end of resistance pipe, and the air distributor hypoplastron is connected to the lower extreme of resistance pipe, sets up the recirculation hole on the pipe wall of resistance pipe, and the both ends of resistance pipe communicate the through-hole of air distributor upper plate and air distributor hypoplastron respectively.
The resistance pipe adopts the reducing pipe, the diameter increases from last down in proper order for the reducing pipe, and the recirculation hole is seted up on the pipe wall of reducing pipe near the upper end.
The resistance pipe adopts a Venturi tube, and the recirculation hole is formed in the throat part of the Venturi tube.
At least one circulation hole is formed.
The biomass boiler system adopting the air distribution plate structure of the utility model comprises the air distribution plate, a hearth, a heat exchanger, a desulfurizing tower, a dust remover, an induced draft fan and a chimney; an air chamber is arranged below the air distribution plate, a slag discharge pipe is arranged below the air chamber, a hearth is arranged above the air distribution plate, and an outlet of the hearth is sequentially provided with a heat exchanger, a desulfurizing tower, a dust remover, an induced draft fan and a chimney which are communicated along the flow direction of flue gas;
the export of draught fan sets up the gas recirculation branch road, the gas recirculation branch road and grid plate intercommunication set up the recirculation valve on the gas recirculation branch road.
The peripheries of the upper plate and the lower plate of the air distribution plate are sealed, and a flue gas inlet is formed at the same time; and the flue gas recirculation branch is communicated with the recirculation hole in the air distribution plate through the flue gas inlet.
The flue gas recirculation branch is provided with a pressure gauge, a thermometer and a flowmeter, and the pressure gauge, the thermometer and the flowmeter are all connected to the plant DCS.
A circulating fluidized bed boiler, a bubbling bed boiler or a differential fluidized bed boiler is adopted.
Compared with the prior art, the utility model discloses following beneficial effect has at least: certain resistance has been set for through the resistance pipe to the air distributor, and the fluidization wind evenly distributed of being convenient for helps improving combustion efficiency, and the interior foreign matter of being convenient for in addition discharges, helps improving the stability of boiler burning, prolongs its operating cycle.
In the boiler system based on the air distribution plate, the air distribution plate sets a certain resistance through the Venturi tube, so that fluidized air is conveniently and uniformly distributed, the combustion efficiency is favorably improved, foreign matters in a boiler are conveniently discharged, and the combustion stability of the boiler is favorably improved; a smoke recirculation branch is arranged at the outlet of the induced draft fan and communicated with the air distribution plate, and partial smoke is returned to a dense-phase area of the boiler by utilizing the outlet pressure of the induced draft fan and the negative pressure generated by a Venturi, so that the original emission of pollutants and the combustion temperature of a hearth are controlled; meanwhile, the flue gas recirculation of the system does not need to be provided with a booster fan, the flue gas does not need to pass through a primary fan and a secondary fan, the problem of fan blade corrosion does not exist, and the system reliability is higher.
Drawings
Fig. 1 is a schematic diagram of a system according to the present invention.
Fig. 2 is a schematic view of an implementable grid plate of the present invention.
Wherein: 1. the device comprises a slag discharge pipe, 2, an air chamber, 3, a novel air distribution plate, 31, an air distribution plate upper plate, 32, a Venturi tube, 33, an air distribution plate lower plate, 34, a recirculation hole, 4, a hearth, 5, a heat exchanger, 6, a desulfurizing tower, 7, a recirculation valve, 8, an induced draft fan, 9, a dust remover, 10 and a chimney.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings and examples.
Referring to fig. 2, an air distribution plate structure for a biomass boiler includes an air distribution plate upper plate 31, a resistance pipe, and an air distribution plate lower plate 33; evenly set up the through-hole on air distributor upper plate 31 and the air distributor hypoplastron 33, air distributor upper plate 31 is connected to the upper end of resistance pipe, air distributor hypoplastron 33 is connected to the lower extreme of resistance pipe, sets up recirculation hole 34 on the pipe wall of resistance pipe, and the both ends of resistance pipe communicate the through-hole of air distributor upper plate 31 and air distributor hypoplastron 33 respectively.
As shown in fig. 2, the air distribution plate structure for biomass boiler according to the present invention comprises an upper air distribution plate 31, a venturi tube 32 and a lower air distribution plate 33; the through holes are uniformly formed in the air distribution plate upper plate 31 and the air distribution plate lower plate 33, the air distribution plate upper plate 31 is connected to the upper end of the Venturi tube 32, the air distribution plate lower plate 33 is connected to the lower end of the Venturi tube 32, the recirculation hole 34 is formed in the throat part of the Venturi tube 32, and the Venturi tube 33 is communicated with the through holes of the air distribution plate upper plate 31 and the air distribution plate lower plate 33 respectively.
Preferably, the resistance tube is a venturi tube 32, and the recirculation hole 34 is formed at the throat of the venturi tube 32; the pipe diameter of the part above the throat part of the Venturi tube 32 is gradually enlarged, the Venturi tube is more suitable, and the structure of the Venturi tube enables the foreign matters in the furnace to be discharged more conveniently.
Optionally, the resistance pipe is a reducer pipe, the diameters of the reducer pipe are sequentially increased from top to bottom, and the recirculation hole 34 is formed in the pipe wall of the reducer pipe close to the upper end.
At least one circulation hole 34 is opened.
The biomass boiler system adopting the air distribution plate structure of the utility model comprises an air distribution plate 3, a hearth 4, a heat exchanger 5, a desulfurizing tower 6, a dust remover 9, an induced draft fan 8 and a chimney 10; an air chamber 2 is arranged below the air distribution plate 3, a slag discharge pipe 1 is arranged below the air chamber 2, a hearth 4 is arranged above the air distribution plate 3, and a heat exchanger 5, a desulfurizing tower 6, a dust remover 9, an induced draft fan 8 and a chimney 10 which are communicated with each other are sequentially arranged at the outlet of the hearth 4 along the flow direction of flue gas; the export of draught fan 8 sets up the gas recirculation branch road, the gas recirculation branch road and the aerofoil 3 intercommunication of arranging recirculation valve 7 on the gas recirculation branch road.
The peripheries of the air distribution plate upper plate 31 and the air distribution plate lower plate 33 are sealed, and a flue gas inlet is formed at the same time; the flue gas recirculation branch is communicated with the recirculation hole in the air distribution plate 3 through the flue gas inlet.
The flue gas recirculation branch is provided with a pressure gauge, a thermometer and a flowmeter, and the pressure gauge, the thermometer and the flowmeter are all connected to the plant DCS.
Biomass boiler system, adopt circulating fluidized bed boiler, tympanic bulla bed boiler or differential fluidized bed boiler.
As shown in fig. 1, the boiler system using the air distribution plate of the present invention comprises an air chamber 2 below the air distribution plate 3 and a slag discharge pipe 1 below the air chamber 2, wherein a furnace chamber 4 is arranged above the air distribution plate 3, and a heat exchanger 5, a desulfurizing tower 6, a dust remover 9, an induced draft fan 8 and a chimney 10 are arranged at the outlet of the furnace chamber 4 in sequence; a flue gas recirculation branch is arranged at the outlet of the induced draft fan 8 and connected to the middle of the novel air distribution plate 3, and a recirculation valve 7 is arranged on the flue gas recirculation branch; wherein, the air distribution plate 3 comprises an air distribution plate upper plate 31, a Venturi tube 32 and an air distribution plate lower plate 33; the venturi tube 32 is provided with a recirculation hole 34; the flue gas of the flue gas recirculation is sent into the hearth 4 through a recirculation hole 34 formed in the venturi tube 32; the air in the air chamber 2 enters the hearth 4 through the Venturi tube 32 under the blockage of the lower plate 33 of the air distribution plate; the lighter materials in the hearth 4 are suspended and combusted in the hearth, and the heavier impurities are discharged out of the furnace through the Venturi tube 32.
The pressure gauge, thermometer and flowmeter can be used for real-time monitoring of the flue gas temperature, pressure and flow of the recirculation branch.
Claims (8)
1. An air distribution plate structure for a biomass boiler is characterized by comprising an air distribution plate upper plate (31), a resistance pipe and an air distribution plate lower plate (33); evenly set up the through-hole on air distributor upper plate (31) and air distributor hypoplastron (33), air distributor upper plate (31) is connected to the upper end of resistance pipe, and air distributor hypoplastron (33) is connected to the lower extreme of resistance pipe, sets up recirculation hole (34) on the pipe wall of resistance pipe, and the through-hole of air distributor upper plate (31) and air distributor hypoplastron (33) is communicate respectively at the both ends of resistance pipe.
2. The air distribution plate structure for the biomass boiler according to claim 1, characterized in that the resistance pipe is a reducer pipe, the diameter of the reducer pipe is gradually increased from top to bottom, and the recirculation hole (34) is formed in the pipe wall of the reducer pipe close to the upper end.
3. The air distribution plate structure for biomass boilers according to claim 1, characterized in that the resistance pipe employs a venturi tube (32), and the recirculation hole (34) is opened at the throat of the venturi tube (32).
4. The air distribution plate structure for biomass boilers according to claim 1, characterized in that the circulation holes (34) are opened at least one.
5. The boiler system adopting the air distribution plate structure of claim 1, which is characterized by comprising an air distribution plate (3), a hearth (4), a heat exchanger (5), a desulfurizing tower (6), a dust remover (9), an induced draft fan (8) and a chimney (10); an air chamber (2) is arranged below the air distribution plate (3), a slag discharge pipe (1) is arranged below the air chamber (2), a hearth (4) is arranged above the air distribution plate (3), and an outlet of the hearth (4) is sequentially provided with a communicated heat exchanger (5), a desulfurizing tower (6), a dust remover (9), an induced draft fan (8) and a chimney (10) along the flow direction of flue gas;
the export of draught fan (8) sets up the gas recirculation branch road, the gas recirculation branch road and grid plate (3) intercommunication set up recirculation valve (7) on the gas recirculation branch road.
6. The boiler system according to claim 5, wherein the upper plate (31) and the lower plate (33) are sealed and provided with a flue gas inlet; the flue gas recirculation branch is communicated with the recirculation hole in the air distribution plate (3) through the flue gas inlet.
7. The boiler system according to claim 5, wherein a pressure gauge, a temperature gauge and a flow meter are arranged on the flue gas recirculation branch, and the pressure gauge, the temperature gauge and the flow meter are all connected to the plant area DCS.
8. The boiler system according to claim 5, wherein a circulating fluidized bed boiler, a bubbling bed boiler or a differential fluidized bed boiler is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022043169.9U CN212456820U (en) | 2020-09-17 | 2020-09-17 | Air distribution plate structure for biomass boiler and boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022043169.9U CN212456820U (en) | 2020-09-17 | 2020-09-17 | Air distribution plate structure for biomass boiler and boiler system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212456820U true CN212456820U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022043169.9U Active CN212456820U (en) | 2020-09-17 | 2020-09-17 | Air distribution plate structure for biomass boiler and boiler system |
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| Country | Link |
|---|---|
| CN (1) | CN212456820U (en) |
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2020
- 2020-09-17 CN CN202022043169.9U patent/CN212456820U/en active Active
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