CN112029543A - Powdered fuel preheating gas generator and corresponding powdered fuel boiler - Google Patents
Powdered fuel preheating gas generator and corresponding powdered fuel boiler Download PDFInfo
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- CN112029543A CN112029543A CN202010952353.7A CN202010952353A CN112029543A CN 112029543 A CN112029543 A CN 112029543A CN 202010952353 A CN202010952353 A CN 202010952353A CN 112029543 A CN112029543 A CN 112029543A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
Abstract
The invention relates to a pulverized fuel preheating gas generator and a corresponding pulverized fuel boiler. The pulverized coal preheating burner and the corresponding boiler have small operation elastic space, therefore, the pulverized coal preheating gas generator comprises a preheating combustion chamber, a gas-solid separator and a material returning device, and also comprises an auxiliary gas-solid separator, wherein the auxiliary gas-solid separator is arranged at the middle section of an air outlet pipe connected with a gas outlet at the top of the gas-solid separator, the auxiliary gas-solid separator comprises an expansion shell, the cross section area of an inner cavity of the expansion shell is more than or equal to 1.3 times of that of the air outlet pipe, and the height of the expansion shell is more than or equal to 0.5 m. The upper part of the preheating combustion chamber can be additionally provided with an air-solid pre-separation chamber. The horizontal boiler with the powdery fuel comprises a horizontal boiler body and the powdery fuel preheating burner. The invention has the advantages of large operation elastic space, easy operation balance and easy maintenance after balance, and is suitable for various industrial and power station boilers.
Description
Technical Field
The invention relates to a powdery fuel preheating gas generator and a corresponding powdery fuel boiler (comprising a powdery fuel horizontal combustion boiler and a powdery fuel vertical combustion boiler).
Background
2018.03.23 entitled and published Chinese patent with publication number CN 104791775B discloses a vertical pulverized coal boiler with a burner at the bottom, and 2015.08.12 entitled and published Chinese utility model with publication number CN204554755U discloses a waste heat boiler used together with the same.
The pulverized coal preheating burner disclosed in CN 104791775B comprises a preheating combustion chamber, a gas-solid separator and a material returning device which are connected in sequence, and the three form a circulating fluidized bed type gas generating device. The vertical pulverized coal boiler has the advantages of sufficient combustion, small tail gas treatment burden, high efficiency, energy conservation and environmental protection.
The core of the pulverized coal preheating burner is a fluidized bed structure, quartz sand is stored in the fluidized bed structure and serves as a fluidized bed bottom material, after ignition, hot quartz sand continuously rolls and flows in a preheating combustion chamber to form countless rolling and flowing fire species, pulverized coal entering the preheating combustion chamber and oxygen in primary air and powder feeding air quickly react under the guidance of the fire species, and the pulverized coal and the oxygen generate carbon monoxide under the condition of insufficient oxygen due to the fact that the pulverized coal is excessive, heat is released at the same time, the quartz sand is further heated, and the quartz sand is kept to roll at a high temperature. The generated carbon monoxide, unreacted coal dust and part of quartz sand enter a gas-solid separator, the quartz sand is separated by the gas-solid separator, then enters a material returning device through a lower solid outlet, and then returns to the preheating combustion chamber through the material returning device, and the separated gases (containing a small amount of coal dust) such as the carbon monoxide and the like enter a vertical boiler from a gas outlet at the top of the gas-solid separator, meet secondary air and tertiary air in the vertical boiler, and are fully combusted.
The pulverized coal preheating burner and the corresponding vertical boiler have the advantages of full combustion, high efficiency and environmental protection. The pulverized coal preheating burner and the corresponding vertical boiler are industrially applied in China, but have the problems of small operation elastic space, difficult establishment of material balance in operation, difficult maintenance of easy bottom material leakage after the material balance is established and the like, and are continuously improved and perfected at present.
Disclosure of Invention
The invention aims to solve the technical problems of how to overcome the defects that the conventional pulverized coal preheating burner and a corresponding vertical pulverized coal boiler have small operation elastic space, are difficult to establish material balance in operation, are difficult to maintain and are easy to run out of bottom materials after the material balance is established and the like, and provides a pulverized fuel preheating coal generator and a corresponding pulverized fuel boiler (comprising a pulverized fuel horizontal combustion boiler and a pulverized fuel vertical combustion boiler) which have large operation elastic space and can maintain the material balance in operation for a long time so as to improve the safety and reliability of the boiler in operation.
The inventor proves that through long-time practice and research: the internal temperature of the existing pulverized coal preheating burner is over 800 ℃, and when the fluidized bed works, the fluidized bed is influenced by primary air and pulverized coal feeding air flow and carbon monoxide air flow generated by incomplete combustion of pulverized coal, the air flow is small, and bed charge in the fluidized bed cannot effectively flow to form material circulation; the airflow is large, the bed charge blown into the gas-solid separator is too much, and when the airflow is serious, part of the bed charge is carried in the boiler, so that the bed charge in the fluidized bed of the pulverized coal preheating burner is too little, the resistance of primary air and pulverized coal feeding air is suddenly reduced, the feeding fluctuation is too large, and the operation of the pulverized coal preheating burner is unstable. The main reasons that the existing pulverized coal preheating burner and the vertical boiler have small elastic space, the material balance is not easy to establish in operation, and the easy bottom material running is difficult to maintain after the material balance is established are that the pulverized coal preheating burner and the vertical boiler are easy to operate.
Based on the knowledge, the powdery fuel preheating gas generator of the invention comprises a preheating combustion chamber, a gas-solid separator and a material returning device, wherein the middle lower part of the preheating combustion chamber is provided with a fluidized bed structure, the inside of the preheating combustion chamber is stored with a fluidized bed material, the bottom of the preheating combustion chamber is in an inverted cone shape, the bottom end of the preheating combustion chamber is communicated with a primary air pipe, one side of the bottom of the preheating combustion chamber is communicated with the lower opening of the material returning device, the preheating combustion chamber is provided with a powdery fuel feeding pipe and a fluidized bed material pipe, the top of the fluidized bed material pipe is provided with a feeding hopper and a feeding valve, the gas-solid separator is in a cyclone separator structure, the gas-solid separator is provided with an inlet, a lower solid outlet and a top gas outlet, the inlet of the gas-solid separator is communicated with the top of the preheating combustion chamber, the lower solid outlet of the gas-solid separator is communicated with, zigzag pipeline includes one section material of falling U-shaped and seals pipe, its characterized in that: the gas-solid separator comprises an expansion shell, the cross section area of the inner cavity of the expansion shell is more than or equal to 1.3 times of that of the inner cavity of the gas outlet pipe, and the height of the expansion shell is more than or equal to 0.5 m.
The structure design is that the gas mixture (mainly carbon monoxide and nitrogen) separated from the gas-solid separator firstly enters the gas outlet pipe after passing through the gas outlet at the top, and then enters the expansion shell of the auxiliary gas-solid separator, because the cross section area of the inner cavity of the expansion shell is more than or equal to 1.3 times of the cross section area of the gas outlet pipe, according to the fluid principle, the gas flow rate of the gas mixture is greatly reduced, simultaneously, the density of the gas mixture is greatly reduced, the bottom material and the unburned fuel powder carried by the gas mixture are also greatly reduced by the blowing force of the gas mixture, the blowing force is not enough to overcome the gravity of the bottom material and the unburned fuel powder carried by the gas mixture, and the bottom material and the unburned fuel powder fall back into the gas-solid separator under the action of gravity, thereby reducing or avoiding the problem of unstable operation caused by the loss of the bottom material of the fluidized bed, and simultaneously, the fuel powder can also pass through the gas-solid, and returning to the preheating combustion chamber again to react with oxygen to generate coal gas.
Preferably, the auxiliary gas-solid separator further comprises an annular top sealing plate and an inverted cone-shaped transition section, the expansion shell is cylindrical, the outer edge of the annular top sealing plate is welded to the upper edge of the expansion shell, the inner edge of the annular top sealing plate is welded to the gas outlet pipe above the auxiliary gas-solid separator, the lower edge of the expansion shell is welded to the outer edge of the large end of the inverted cone-shaped transition section, and the outer edge of the small end of the inverted cone-shaped transition section is welded to the gas outlet pipe below the auxiliary gas-solid separator. The design has simple structure and convenient welding, and simultaneously, the fluidized bed bottom material separated from the inside of the expansion shell falls back to the gas-solid separator more easily under the guide of the inverted cone-shaped transition section.
Preferably, the upper part of the preheating combustion chamber is also provided with a top sealing plate, an expansion shell and a reverse taper tubular transition section, the expansion shell is cylindrical, the side wall of the top of the expansion shell is provided with an air outlet groove, the outer edge of the top sealing plate is welded on the upper edge of the expansion shell and the upper edge of the side wall of the air outlet groove, the top sealing plate and the air outlet groove enclose an air outlet and are communicated with an inlet of a gas-solid separator through the air outlet, the lower edge of the expansion shell is welded on the outer edge of the large end of the reverse taper tubular transition section, the outer edge of the small end of the reverse taper tubular transition section is welded on the side wall of the fluidized bed at the middle lower part of the preheating combustion chamber, the area of the cross section of the inner cavity of the expansion shell is more than or equal to 1.3 times of the area of the cross section of the inner cavity of the fluidized bed, the height of the expansion shell.
According to the design, the fuel powder and the oxygen react at high temperature in the fluidized bed to generate coal gas, and before entering the gas-solid pre-separation chamber, the coal gas reacts to form coal gas mixed gas (mainly comprising carbon monoxide and nitrogen), the coal gas mixed gas is mixed with more fluidized bed bottom materials and unburned fuel powder and enters the gas-solid pre-separation chamber together, according to the fluidics principle, the area of the cross section is doubled, the flow velocity of the coal gas mixed gas is greatly reduced, and meanwhile, the density of the coal gas mixed gas is greatly reduced. The fluidized bed bottom materials and unburned fuel powder carried by the gas mixture are greatly reduced by the blowing and supporting force of the gas mixture, most of the gas mixture falls back into the fluidized bed under the action of the gravity of the gas mixture, and then the gas mixture is blown up by primary air and powder feeding air again so as to continuously roll and flow.
On one hand, the retaining quantity of effective bottom materials in the fluidized bed is maintained, and the fluidized bed operates more stably; on the other hand, the bed charge entering the gas-solid separator is reduced, and the workload of the gas-solid separator is lightened, thereby being more beneficial to the stable operation of the powder preheating gas generator.
The powdery fuel preheating burner has better heat storage property, and anthracite, coal slurry washed and selected dry powder in a coal preparation plant, blue carbon powder or gasification furnace ash residue or semicoke powder with lower volatile matter or other powdery solid wastes with certain calorific value which can not be combusted by a conventional pulverized coal boiler can be stably ignited and combusted in the powdery fuel preheating burner and the boiler thereof.
The invention greatly improves the operation flexibility and stability of the powdery fuel preheating burner by introducing the auxiliary gas-solid separator and/or the gas-solid pre-separating chamber, thereby improving the overall safety and reliability of the powdery fuel preheating burner and the powdery fuel horizontal combustion boiler or the powdery fuel vertical combustion boiler system.
The powdery fuel preheating burner is coupled and connected with a horizontal powdery fuel boiler or a vertical powdery fuel boiler. The quantity of the bottom material and the feeding quantity of the powdery fuel preheating burner are matched with the capacity of a horizontal powdery fuel boiler or a vertical powdery fuel boiler and the characteristics of the powdery fuel for combustion.
The invention relates to a powdery fuel horizontal boiler, which comprises a horizontal boiler body, wherein one end of the horizontal boiler body is a feeding end, the feeding end is provided with a feeding hole, and the other end is provided with a tail flue, and the powdery fuel horizontal boiler is characterized in that: the horizontal boiler body is characterized in that a secondary air box is arranged in the center of the side wall of the feeding end of the horizontal boiler body, the outside of the secondary air box is communicated with a secondary air pipe, a plurality of secondary air nozzles communicated with the secondary air box are arranged inside the horizontal boiler body, and the feeding port is connected with the powdery fuel preheating burner. By the design, the auxiliary gas-solid separator and/or the gas-solid pre-separation chamber are/is additionally arranged, so that the operation flexibility of the powdery fuel preheating burner is improved, the horizontal boiler is easier to balance during operation, and the balance is easier to maintain.
Preferably, a plurality of burnout air pipes are arranged on the side wall of the horizontal boiler body, the burnout air pipes are uniformly distributed on the horizontal boiler body, all the burnout air pipes are communicated with the burnout air main pipe, and a special burnout fan (or called a tertiary fan) is arranged on the burnout air main pipe or the burnout air main pipe is led out from the secondary air duct main pipe or the secondary air box. The design has the advantages of sufficient combustion, less harmful substances in tail gas, energy conservation and environmental protection.
The invention relates to a powdery fuel vertical boiler, which comprises a vertical boiler body, wherein the lower end of the vertical boiler body is a feeding end, and the feeding end is provided with a feeding hole, and the powdery fuel vertical boiler is characterized in that: the feed inlet of the vertical boiler body is connected with the powdery fuel preheating burner.
The powdery fuel preheating coal gas generator and the corresponding powdery fuel boiler have large operation elastic space, are easy to operate and balance, are easy to maintain after being balanced, can burn bituminous coal used for conventional pulverized coal boilers, can stably burn anthracite coal, coal slurry dry powder washed and selected by coal dressing plants, blue carbon powder, gasification furnace ash, semi-coke powder or other powdery solid wastes with a certain heat value, and are suitable for various industrial boilers, power station boilers and other boilers.
Drawings
The pulverized fuel preheating gas generator and the corresponding pulverized fuel boiler of the present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic view of a pulverized fuel-preheating gas generator according to a first embodiment of the present invention (in the drawing, the direction of the arrow indicates the falling direction of the bed bottom material);
FIG. 2 is a schematic view of a second embodiment of the pulverized-fuel preheating gas generator (in the figure, the direction of the arrow indicates the falling direction of the bed bottom material);
FIG. 3 is a schematic view of third and fourth embodiments of the pulverized fuel horizontal boiler;
FIG. 4 is a schematic view of an embodiment of the present pulverized fuel vertical boiler.
In the figure: 1 is a preheating combustion chamber, 11 is a fluidized bed, 2 is a gas-solid separator, 3 is a return feeder, 31 is an inverted U-shaped material sealing pipe, 4 is a fluidized bed bottom material, 5 is a primary air pipe, 6 is a powdery fuel feeding pipe, 7 is a fluidized bed bottom material pipe, 8 is a sand feeding hopper, 9 is a sand feeding valve, 10 is an air outlet pipe, 12 is an auxiliary gas-solid separator, 121 is an expanding shell, 122 is an annular top sealing plate, 123 is an inverted cone-shaped transition section, 124 is an air outlet groove, 13 is a top sealing plate, 14 is a gas-solid pre-separation chamber, 15 is a horizontal boiler body, 16 is a tail flue, 17 is a secondary air bellow, 18 is a secondary air pipe, 19 is a secondary air nozzle, 20 is an ash burning air pipe, and 21 is a vertical boiler body.
Detailed Description
The first implementation mode comprises the following steps: as shown in fig. 1, the pulverized fuel preheated gas generator of the present invention comprises a preheating combustion chamber 1, a gas-solid separator 2 and a material returning device 3, wherein the middle lower part of the preheating combustion chamber 1 is provided with a fluidized bed 11 structure, the fluidized bed material 4 is stored in the preheating combustion chamber, the bottom of the preheating combustion chamber 1 is in an inverted cone shape, the bottom end of the preheating combustion chamber 1 is communicated with a primary air pipe 5, one side of the bottom is communicated with the lower port of the material returning device 3, the preheating combustion chamber 1 is provided with a pulverized fuel feeding pipe 6 and a fluidized bed material pipe 7, the top of the fluidized bed material pipe 7 is provided with a feeding hopper 8 and a feeding valve 9, the gas-solid separator 2 is in a cyclone separator structure, the gas-solid separator 2 is provided with an inlet, a lower solid outlet and a top gas outlet, the inlet of the gas-solid separator is communicated with the top of the preheating combustion chamber 1, the lower solid outlet of the gas-solid separator 2 is communicated, the return feeder 3 comprises a section of zigzag pipeline, and the zigzag pipeline comprises a section of inverted U-shaped material sealing pipe 31, and is characterized in that: the gas-solid separator further comprises an auxiliary gas-solid separator 12, the auxiliary gas-solid separator 12 is arranged on the gas outlet pipe 10, the auxiliary gas-solid separator 12 comprises an expansion shell 121, the cross section area of the inner cavity of the expansion shell 121 is more than or equal to 1.3 times of that of the inner cavity of the gas outlet pipe 10, and the height of the expansion shell 121 is more than or equal to 0.5 meter.
The auxiliary gas-solid separator 12 further comprises an annular top sealing plate 122 and an inverted cone-shaped transition section 123, the expansion shell 121 is cylindrical, the outer edge of the annular top sealing plate 122 is welded to the upper edge of the expansion shell 121, the inner edge of the annular top sealing plate 122 is welded to the gas outlet pipe 10 above the auxiliary gas-solid separator 12, the lower edge of the expansion shell 121 is welded to the outer edge of the large end of the inverted cone-shaped transition section 123, and the outer edge of the small end of the inverted cone-shaped transition section 123 is welded to the gas outlet pipe 10 below the auxiliary gas-solid separator 12.
The second embodiment: as shown in fig. 2, the preheating combustion chamber 1 is further provided at an upper portion thereof with a top sealing plate 13, an enlarged casing 121 and an inverted cone-shaped transition section 123, the enlarged casing 121 has a cylindrical shape, the side wall of the top part of the expansion shell is provided with an air outlet groove 124, the outer edge of the top sealing plate 13 is welded on the upper edge of the expansion shell 121 and the upper edge of the side wall of the air outlet groove 124, the top sealing plate 13 and the air outlet groove 124 enclose an air outlet, and is communicated with the inlet of the gas-solid separator 2 through the gas outlet, the lower edge of the expanded shell 121 is welded on the outer edge of the large end of the inverted cone-shaped transition section 123, the outer edge of the small end of the inverted cone-shaped transition section 123 is connected to the side wall of the fluidized bed 11 at the middle lower part of the preheating combustion chamber 1, the cross section area of the inner cavity of the expansion shell 121 is more than or equal to 1.3 times of the cross section area of the inner cavity of the fluidized bed, the height of the expansion shell 121 is more than or equal to 0.5 m, the top closure plate 13, the enlarged housing 121 and the inverted conical transition section 123 form a gas-solids preseparation chamber 14 above the fluidized bed 11. The rest of the structure is as shown in the first embodiment, but omitted.
The third embodiment is as follows: as shown in fig. 3, the horizontal pulverized fuel combustion boiler of the present invention includes a horizontal boiler body 15, one end of the horizontal boiler body 15 is a feeding end, the feeding end is provided with a feeding port, the other end is provided with a tail flue 16, and the horizontal pulverized fuel combustion boiler is characterized in that: the side wall center of the feeding end of the horizontal boiler body 15 is provided with a secondary air box 17, the outside of the secondary air box 17 is communicated with a secondary air pipe 18, the inside of the horizontal boiler body 15 is provided with a plurality of secondary air nozzles 19 communicated with the secondary air box 17, and the feeding port is connected with the powdery fuel preheating burner of the first or second embodiment mode, but not necessarily.
The fourth embodiment: as shown in fig. 3, a plurality of burnout air pipes 20 are disposed on the side wall of the horizontal boiler body 15, the burnout air pipes 20 are uniformly distributed on the horizontal boiler body 15, a dedicated burnout fan (or referred to as a tertiary fan) (not shown) is disposed on the burnout air main pipe 20, or the burnout air main pipe 20 is led out from the secondary air main pipe or the secondary air box, and the rest of the structure is omitted as shown in the third embodiment.
The fifth embodiment: the invention relates to a vertical combustion boiler for powdery fuel, which comprises a vertical boiler body 21, wherein the lower end of the vertical boiler body 21 is a feeding end, and the feeding end is provided with a feeding hole, and the vertical combustion boiler is characterized in that: the feeding port of the vertical boiler body 21 is connected with the pulverized fuel preheating burner according to one or two embodiments, as shown in fig. 4, of course, the fuel inlet of the vertical boiler body 21 can also be introduced from both sides of the furnace, as shown in the figure.
The present invention includes, but is not limited to, the above embodiments, and any products according to the claims of the present invention are within the scope of the present invention.
Claims (6)
1. A powdery fuel preheating gas generator comprises a preheating combustion chamber, a gas-solid separator and a material returning device, wherein a fluidized bed structure is arranged at the middle lower part of the preheating combustion chamber, a fluidized bed material is stored in the fluidized bed structure, the bottom of the preheating combustion chamber is in an inverted cone shape, the bottom end of the preheating combustion chamber is communicated with a primary air pipe, one side of the bottom of the preheating combustion chamber is communicated with a lower opening of the material returning device, a powdery fuel feeding pipe and a fluidized bed material pipe are arranged on the side wall of the lower part of the preheating combustion chamber, a feeding hopper and a feeding valve are arranged at the top of the fluidized bed material pipe, the gas-solid separator is of a cyclone separator structure and is provided with an inlet, a lower solid outlet and a top gas outlet, the inlet of the gas-solid separator is communicated with the top of the preheating combustion chamber, the lower solid outlet of the gas-solid separator is communicated with an upper opening of the material returning, zigzag pipeline includes one section material of falling U-shaped and seals pipe, its characterized in that: the gas-solid separator comprises an expansion shell, the cross section area of the inner cavity of the expansion shell is more than or equal to 1.3 times of that of the inner cavity of the gas outlet pipe, and the height of the expansion shell is more than or equal to 0.5 m.
2. The pulverized-fuel-preheated gas generator as claimed in claim 1, wherein: the auxiliary gas-solid separator also comprises an annular top sealing plate and an inverted cone-shaped transition section, the expansion shell is cylindrical, the outer edge of the annular top sealing plate is welded on the upper edge of the expansion shell, the inner edge of the annular top sealing plate is welded on the air outlet pipe above the auxiliary gas-solid separator, the lower edge of the expansion shell is welded on the outer edge of the large end of the inverted cone-shaped transition section, and the outer edge of the small end of the inverted cone-shaped transition section is welded on the air outlet pipe below the auxiliary gas-solid separator.
3. The pulverized-fuel-preheated gas generator as claimed in claim 1, wherein: the preheating combustion chamber is characterized in that the upper part of the preheating combustion chamber is also provided with a top sealing plate, an expansion shell and a reverse taper tubular transition section, the expansion shell is cylindrical, the side wall of the top of the expansion shell is provided with an air outlet groove, the outer edge of the top sealing plate is welded on the upper edge of the expansion shell and the upper edge of the side wall of the air outlet groove, the top sealing plate and the air outlet groove enclose an air outlet and are communicated with an inlet of a gas-solid separator through the air outlet, the lower edge of the expansion shell is welded on the outer edge of the large end of the reverse taper tubular transition section, the outer edge of the small end of the reverse taper tubular transition section is welded on the side wall of a fluidized bed at the middle lower part of the preheating combustion chamber, the cross section area of an inner cavity of the expansion shell is more than or equal to 1.3 times of that of the cross section area of the inner cavity of the fluidized bed.
4. The utility model provides a likepowder fuel horizontal combustion boiler, includes the horizontal boiler body, and this horizontal boiler body one end is the feed end, and the feed end is equipped with the feed inlet, and the other end is equipped with afterbody flue, its characterized in that: the horizontal boiler body is provided with a secondary air box at the center of the side wall of the feeding end, the outside of the secondary air box is communicated with a secondary air pipe, a plurality of secondary air nozzles communicated with the secondary air box are arranged inside the horizontal boiler body, and the feeding port is connected with the powder fuel preheating burner as claimed in claim 1, 2 or 3.
5. The pulverized-fuel horizontal combustion boiler as claimed in claim 4, wherein: be equipped with a plurality of ashes of burning tuber pipes on the horizontal boiler body lateral wall, above-mentioned ashes of burning tuber pipe evenly distributed is on the horizontal boiler body, and all ashes of burning tuber pipes all communicate with each other with the ashes of burning tuber pipe house steward, are equipped with dedicated ashes of burning fan on the ashes of burning tuber pipe house steward, perhaps the ashes of burning tuber pipe house steward is drawn forth from secondary air duct house steward or secondary bellows.
6. The utility model provides a vertical combustion boiler of likepowder fuel, includes vertical boiler body, and this vertical boiler body lower extreme is the feed end, and the feed end is equipped with feed inlet, its characterized in that: the powder fuel preheating burner of claim 1 or 2 or 3 is connected to the feed inlet of the vertical boiler body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952353.7A CN112029543A (en) | 2020-09-11 | 2020-09-11 | Powdered fuel preheating gas generator and corresponding powdered fuel boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952353.7A CN112029543A (en) | 2020-09-11 | 2020-09-11 | Powdered fuel preheating gas generator and corresponding powdered fuel boiler |
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| Publication Number | Publication Date |
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| CN112029543A true CN112029543A (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010952353.7A Pending CN112029543A (en) | 2020-09-11 | 2020-09-11 | Powdered fuel preheating gas generator and corresponding powdered fuel boiler |
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| Country | Link |
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| CN (1) | CN112029543A (en) |
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2020
- 2020-09-11 CN CN202010952353.7A patent/CN112029543A/en active Pending
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