CN115539937A - Pulverized coal furnace for power generation of power station - Google Patents

Pulverized coal furnace for power generation of power station Download PDF

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Publication number
CN115539937A
CN115539937A CN202210598795.5A CN202210598795A CN115539937A CN 115539937 A CN115539937 A CN 115539937A CN 202210598795 A CN202210598795 A CN 202210598795A CN 115539937 A CN115539937 A CN 115539937A
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China
Prior art keywords
slag
furnace body
fixedly connected
furnace
pulverized coal
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Pending
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CN202210598795.5A
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Chinese (zh)
Inventor
卢志红
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Individual
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Individual
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Priority to CN202210598795.5A priority Critical patent/CN115539937A/en
Publication of CN115539937A publication Critical patent/CN115539937A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08—Disposition of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/06—Mechanically-operated devices, e.g. clinker pushers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/12—Heat utilisation in combustion or incineration of waste

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)

Abstract

The invention discloses a pulverized coal furnace for power generation of a power station, which comprises: the furnace body is a cylindrical furnace which is horizontally placed, one end of the furnace body is fixedly connected with a burner and is a feeding end, and the other end of the furnace body is in a circular truncated cone shape; the driving assembly comprises a rotating ring and flow deflectors, a rotating groove is formed in the side wall of the inner part of the discharging end of the furnace body, the rotating ring is rotatably installed in the rotating groove, the flow deflectors are fixedly connected to the inner wall of the rotating ring in an equidistant annular mode, and the flow deflectors are made of high-temperature-resistant materials and form an included angle with the radius of the rotating ring; the cleaning assembly comprises connecting rods and scraping blades, the connecting rods are fixedly connected to one side, far away from the discharge end, of the flow deflector, and the scraping blades are fixedly connected to the side edge of the connecting rods; and a slag outlet is formed in the bottom side of the furnace body. The furnace body of the invention reduces the heat loss, improves the utilization rate of energy and can clean the slag in time.

Description

Pulverized coal furnace for power generation of power station
Technical Field
The invention relates to the technical field of power equipment, in particular to a pulverized coal furnace for power generation of a power station.
Background
The pulverized coal furnace is a boiler device taking pulverized coal as fuel. It has the advantages of rapid and complete combustion, large capacity, high efficiency, wide coal adaptation range, convenient control and regulation, etc. The combustion characteristic of the pulverized coal furnace is that fuel enters the combustion chamber together with air and is combusted in a suspension state. The combustion equipment of coal powder furnace mainly consists of furnace cavity, burner and ignition device. The coal powder is conveyed by primary air and enters the hearth through the burner, and secondary air is introduced into the hearth through a secondary air annular air duct or a secondary air port of the burner.
In the tangential firing mode or the swirl firing mode of pulverized coal, the pulverized coal is burnt and releases heat in a centralized manner, the burning temperature of the pulverized coal exceeds the ash melting point, the pulverized coal is easy to form slag during burning, part of slag is adhered to the water-cooled wall of the hearth, the heat transfer performance of the boiler is influenced, and in the working period of the boiler, part of slag needs to be discharged from the bottom of the hearth, so that the heat inside the boiler is dissipated, and the boiler efficiency is reduced.
Disclosure of Invention
The invention aims to solve the following defects in the prior art that the pulverized coal is easy to form slag during combustion, and part of slag is adhered to a water-cooled wall of a hearth to influence the heat transfer performance of a boiler. A pulverized coal furnace for power generation of a power plant is proposed, in which a part of slag needs to be discharged from the bottom of a furnace during the operation of the boiler, thereby reducing the efficiency of the boiler.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pulverized coal furnace for power generation of a power plant, comprising:
the furnace body is a cylindrical furnace which is horizontally placed, one end of the furnace body is fixedly connected with a burner and is a feeding end, and the other end of the furnace body is arranged to be in a circular truncated cone shape and is a discharging end;
the driving assembly comprises a rotating ring and flow deflectors, a rotating groove is formed in the side wall of the inner part of the discharging end of the furnace body, the rotating ring is rotatably installed in the rotating groove, the flow deflectors are fixedly connected to the inner wall of the rotating ring in an equidistant annular mode, and the flow deflectors are made of high-temperature-resistant materials and form an included angle with the radius of the rotating ring;
the cleaning assembly comprises connecting rods and scraping blades, the connecting rods are fixedly connected to one side, far away from the discharge end, of the flow deflector, and the scraping blades are fixedly connected to the side edges of the connecting rods and are in contact with the inner wall of the furnace body;
lead the sediment subassembly, the slag notch has been seted up to the bottom side of furnace body, lead the sediment subassembly and set up inside the slag notch for sealed slag notch.
Preferably, one end of the connecting rod, which is far away from the flow deflector, is fixedly connected with a fan blade, and the fan blade is obliquely arranged and is consistent with the oblique direction of the flow deflector.
Preferably, it includes gasket and elastic plate to lead the sediment subassembly, the sliding tray has been seted up to slag notch one side, elastic plate one end fixed connection is inside the sliding tray, gasket one end fixed connection is on the elastic plate, the spacing slip setting of gasket is inside the sliding tray.
Preferably, the sliding groove is arranged at the slag outlet along the rotating direction of the flow deflector, and the position of the notch is provided with the sealing strip.
Preferably, the sealing piece is arranged obliquely upwards, one end of the sealing piece, which is far away from the sliding groove, is lower than the other end of the sealing piece, and the sealing piece is made of high-temperature-resistant materials.
Preferably, the sealing piece is fixedly connected with a supporting block, the supporting block is L-shaped, one end of the supporting block is vertically and fixedly connected to the sealing piece, the other end of the supporting block faces the rotation direction of the flow deflector, the end of the supporting block is obliquely arranged, and the supporting block is made of elastic materials.
Preferably, the furnace body bottom is provided with puts the sediment subassembly, put the sediment subassembly including the installation pipe with put the sediment pipe, installation pipe fixed connection just is located under the slag notch in the furnace body below, with the slag notch intercommunication, it sets up at the installation intraduct to put the spacing slip of sediment pipe.
Preferably, the scraping blade is made of elastic fireproof materials, and the outer end of the scraping blade is obliquely arranged.
Preferably, the guide vanes and the fan blades are made of fireproof and high-temperature-resistant light materials, and the surfaces of the guide vanes and the fan blades are smooth.
Compared with the prior art, the invention has the beneficial effects that:
1. because the pulverized coal is combusted in the middle of the furnace body, and each combustion is generated within 1s-2s, a matrix of heat flow can be generated in the furnace body, and meanwhile, the heat flow at the front end can be pushed to move to the discharge end, because the discharge end is in a circular truncated cone shape, the heat flow can impact the inclined flow deflectors in the moving process, and the flow deflectors rotate under the impact drive of the heat flow, so that the rotating ring rotates;
2. the guide vanes can drive the connecting rods and the scraping blades to rotate in the rotating process, and the rotating scraping blades can clean the slag adhered to the inner wall of the furnace body in the rotating process, so that the slag accumulation is avoided, the combustion efficiency of the boiler is influenced, the furnace body reduces the heat loss, improves the utilization rate of energy, and can clean the slag in time;
3. drive the flabellum through drive assembly and rotate to make the pivoted flabellum cause the air to flow, conduct the heat and the buggy granule in backward flow district, remove the burning of buggy to the furnace body middle part and go to burn, the heat that shifts simultaneously reduces thermal scattering and disappearing, improves the rate of utilization of the energy.
Drawings
FIG. 1 is a schematic front view of a pulverized coal furnace for power generation of a power plant according to the present invention;
FIG. 2 is a longitudinal sectional view of a pulverized coal furnace for power generation of a power plant according to the present invention;
FIG. 3 is a cross-sectional view of a pulverized coal furnace for power generation of a power plant according to the present invention;
FIG. 4 is a front view of a cleaning assembly of a pulverized coal furnace for power generation of a power plant according to the present invention;
FIG. 5 is a schematic diagram of a back structure of a cleaning assembly of a pulverized coal furnace for power generation of a power station according to the present invention;
FIG. 6 is a schematic front view of a slag guide assembly of a pulverized coal furnace for power generation of a power station according to the present invention.
In the figure: the device comprises a furnace body 1, a combustor 2, a driving assembly 3, a rotating ring 31, a flow deflector 32, a cleaning assembly 4, a connecting rod 41, a scraping blade 42, a slag guiding assembly 5, a sealing sheet 51, an elastic plate 52, a slag outlet 6, fan blades 7, a resisting block 8, a slag placing assembly 9, a mounting pipe 91 and a slag placing pipe 92.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 6, a pulverized coal furnace for power generation of a power plant includes:
the furnace comprises a furnace body 1, wherein the furnace body 1 is a horizontally placed cylindrical furnace, one end of the furnace body 1 is fixedly connected with a burner 2 and is a feeding end, and the other end of the furnace body is arranged to be in a circular truncated cone shape and is a discharging end;
the furnace body 1 comprises a discharge end, a driving assembly 3 and a plurality of guide vanes 32, wherein the driving assembly 3 comprises a rotating ring 31 and the guide vanes 32, the side wall of the inner part of the discharge end of the furnace body 1 is provided with a rotating groove, the rotating ring 31 is rotatably arranged in the rotating groove, the guide vanes 32 are fixedly connected to the inner wall of the rotating ring 31 in an equidistant annular manner, and the guide vanes 32 are made of high-temperature-resistant materials and form an included angle with the radius of the rotating ring 31;
the cleaning assembly 4 comprises connecting rods 41 and scraping blades 42, the connecting rods 41 are fixedly connected to one side, far away from the discharge end, of the flow deflector 32, and the scraping blades 42 are fixedly connected to the side edges of the connecting rods 41 and are in contact with the inner wall of the furnace body 1;
lead sediment subassembly 5, slag notch 6 has been seted up to the bottom side of furnace body 1, leads sediment subassembly 5 and sets up inside slag notch 6 for sealed slag notch 6.
In the invention, during the use process, the pulverized coal is combusted in the middle of the furnace body 1, and each combustion is generated within 1s-2s, so that a matrix of heat flows in the furnace body 1, and the heat flow at the front end is pushed to move to the discharge end, because the discharge end is in a circular truncated cone shape, the heat flow can impact the inclined flow deflectors 32 in the moving process, the flow deflectors 32 rotate under the impact drive of the heat flow, so that the rotating ring 31 rotates, because the heat flow in the furnace body 1 also moves directionally, because the moving speed is slow, the conduction efficiency is low, the rotating flow deflectors 32 can generate air in the rotating process, the rotating heat can accelerate the moving speed, thereby improving the heat transfer, the flow deflectors 32 can drive the connecting rods 41 and the scraping blades 42 to rotate in the rotating process, and the rotating scraping blades 42 can clean the slag adhered to the inner wall of the furnace body 1 in the rotating process, thereby avoiding slag accumulation and influencing the combustion efficiency of the boiler.
In the preferred technical scheme in this embodiment, one end of the connecting rod 41 away from the flow deflector 32 is fixedly connected with the fan blades 7, the fan blades 7 are arranged in an inclined manner and are consistent with the inclined direction of the flow deflector 32, in the traditional combustion mode, the difference between the injection speed of primary air and secondary air in the inner cavity of the furnace body 1 and the average speed of air flow on the cross section of the furnace body 1 is large, a large backflow area is formed in the inner cavity of the furnace body 1, the backflow area can absorb high-temperature flue gas and preheat coal powder, but the control of the backflow area is complex, coal powder particle agglomeration easily occurs in the backflow area, if the flow field structure in the furnace is not good, the slag-bonding tendency of the furnace body 1 is large, the safe and stable operation of the boiler is influenced, in the use process, the fan blades 7 are driven to rotate by the driving assembly 3, so that the rotating fan blades 7 cause air flow, the heat and the coal powder particles in the backflow area are conducted, the coal powder is moved to the middle of the furnace body for combustion, and the coal powder is moved to the combustion, the heat is transferred, the heat loss is reduced, and the energy consumption rate is improved;
lead sediment subassembly 5 and include gasket 51 and elastic plate 52, the sliding tray has been seted up to slag notch 6 one side, elastic plate 52 one end fixed connection is inside the sliding tray, gasket 51 one end fixed connection is on elastic plate 52, the spacing slip setting of gasket 51 is inside the sliding tray, in the process that doctor-bar 42 removed, can drive gasket 51 and remove in the sliding tray inside, thereby expose slag notch 6, derive the slag of clearance, avoid the loss of heat in the combustion process simultaneously, when losing doctor-bar 42's effect, gasket 51 gets back to the normal position, thereby guarantee the availability factor of boiler;
the sliding groove is arranged in the slag hole 6 along the rotation direction of the flow guide sheet 32, if the flow guide groove rotates clockwise, the sliding groove is positioned on the left side of the slag hole 6, if the flow guide groove rotates anticlockwise, the sliding groove is positioned on the right side of the slag hole 6, and the groove opening is provided with the sealing strip, so that the sealing property is improved, the heat is prevented from dissipating, and the sealing property is enhanced through the sealing strip;
the sealing sheet 51 is arranged obliquely upwards, one end far away from the sliding groove is lower than the other end, the sealing sheet 51 is made of high-temperature-resistant materials, and slag falling on the sealing sheet 51 is guided, so that the slag on the surface of the sealing sheet 51 is moved into the slag outlet 6 in the moving process of the sealing sheet 51, and the slag can be cleaned in the combustion process;
the sealing sheet 51 is fixedly connected with the abutting block 8, the abutting block 8 is L-shaped, one end of the abutting block is vertically and fixedly connected to the sealing sheet 51, the other end of the abutting block 8 faces the rotation direction of the flow deflector 32, the end part of the abutting block is obliquely arranged, the abutting block 8 is made of elastic materials, in the rotation process of the scraping sheet 42, slag on the inner wall of the furnace body 1 can be cleaned, in order to ensure that the slag moving along with the scraping sheet 42 moves into the slag hole 6, the abutting block 8 is firstly contacted with the scraping sheet 42 in one step, so that when the scraping sheet 42 moves to the lower end, the sealing sheet 51 moves, the lower slag hole 6 is leaked, and the slag moving along with the scraping sheet 42 directly moves into the slag hole 6;
the bottom of the furnace body 1 is provided with a slag placing assembly 9, the slag placing assembly 9 comprises a mounting pipe 91 and a slag placing pipe 92, the mounting pipe 91 is fixedly connected below the furnace body 1 and is positioned right below the slag outlet 6 and communicated with the slag outlet 6, the slag placing pipe 92 is arranged in the mounting pipe 91 in a limiting sliding manner, guided slag is placed in the slag placing pipe 92, and after the slag placing pipe 92 is full, the slag placing pipe 92 is pulled to replace and clean the slag placing pipe 92;
the scraping blade 42 is made of elastic fireproof materials, the outer end of the scraping blade is obliquely arranged, the cleaning effect on the interior of the furnace body 1 is improved, and meanwhile, after the scraping blade is contacted with the abutting block 8, the scraping blade can cross the abutting block 8 so as to normally rotate;
the flow deflector 32 and the fan blade 7 are made of fireproof and high-temperature-resistant light materials, the surfaces of the flow deflector 32 and the fan blade 7 are smooth, the gravity of the flow deflector 32 and the fan blade 7 cannot be too high in order to ensure that the flow deflector 32 and the fan blade 7 can rotate in the heat moving process, and meanwhile, flying ash is prevented from being accumulated on the flow deflector 32 and the fan blade 7.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (9)

1. A pulverized coal furnace for power generation of a power plant, comprising:
the furnace body (1) is a cylindrical furnace which is horizontally placed, one end of the furnace body (1) is fixedly connected with a combustor (2) and is a feeding end, and the other end of the furnace body is set to be in a round table shape and is a discharging end;
the furnace body is characterized by comprising a driving assembly (3), wherein the driving assembly (3) comprises a rotating ring (31) and flow deflectors (32), a rotating groove is formed in the side wall of the inner part of the discharging end of the furnace body (1), the rotating ring (31) is rotatably installed in the rotating groove, a plurality of flow deflectors (32) are fixedly connected to the inner wall of the rotating ring (31) in an equidistant annular mode, the flow deflectors (32) are made of high-temperature-resistant materials, and an included angle is formed between the flow deflectors and the radius of the rotating ring (31);
the cleaning assembly (4) comprises connecting rods (41) and scraping blades (42), the connecting rods (41) are fixedly connected to one side, away from the discharge end, of the flow deflector (32), and the scraping blades (42) are fixedly connected to the side edges of the connecting rods (41) and are in contact with the inner wall of the furnace body (1);
lead slag assembly (5), slag notch (6) have been seted up to the bottom side of furnace body (1), lead slag assembly (5) and set up inside slag notch (6) for sealed slag notch (6).
2. The pulverized coal furnace for power plant generation as claimed in claim 1, characterized in that the end of the connecting rod (41) remote from the guide vane (32) is fixedly connected with a fan blade (7), and the fan blade (7) is obliquely arranged and is in the same direction as the inclination direction of the guide vane (32).
3. The pulverized coal furnace for power generation of a power station as set forth in claim 1, characterized in that the slag guiding assembly (5) comprises a sealing piece (51) and an elastic plate (52), a sliding groove is formed on one side of the slag outlet (6), one end of the elastic plate (52) is fixedly connected inside the sliding groove, one end of the sealing piece (51) is fixedly connected on the elastic plate (52), and the sealing piece (51) is arranged inside the sliding groove in a limiting sliding manner.
4. The pulverized coal furnace for power plant generation as claimed in claim 3, characterized in that the chute is opened at the slag outlet (6) in the direction of rotation of the deflector (32) and that sealing strips are provided at the location of the notches.
5. The pulverized coal furnace for power generation of a power plant as defined in claim 3, characterized in that said sealing sheet (51) is disposed obliquely upward and is lower at one end away from the sliding groove than at the other end, and said sealing sheet (51) is made of a high temperature resistant material.
6. The pulverized coal furnace for power plant generation as claimed in claim 3, characterized in that the sealing sheet (51) is fixedly connected with a resisting block (8), the resisting block (8) is L-shaped, one end of the resisting block is vertically and fixedly connected to the sealing sheet (51), the other end of the resisting block (8) faces to the rotation direction of the deflector (32), the end part of the resisting block is obliquely arranged, and the resisting block (8) is made of elastic material.
7. The pulverized coal furnace for power generation of power stations as defined in claim 1, wherein said furnace body (1) is provided with a slag-holding assembly (9) at the bottom, said slag-holding assembly (9) comprises a mounting tube (91) and a slag-holding tube (92), said mounting tube (91) is fixedly connected below the furnace body (1) and located under the slag hole (6) and communicated with the slag hole (6), and said slag-holding tube (92) is slidably arranged in the mounting tube (91) in a limited manner.
8. Pulverized coal furnace for the generation of electric power plants in accordance with claim 1, characterized in that said scraper (42) is made of an elastic fireproof material and has an outer end inclined.
9. The pulverized coal furnace for power plant generation as claimed in claim 2, characterized in that the guide vanes (32) and the fan blades (7) are made of a fire-proof, high temperature resistant, lightweight material and have a smooth surface.
CN202210598795.5A 2022-05-30 2022-05-30 Pulverized coal furnace for power generation of power station Pending CN115539937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210598795.5A CN115539937A (en) 2022-05-30 2022-05-30 Pulverized coal furnace for power generation of power station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210598795.5A CN115539937A (en) 2022-05-30 2022-05-30 Pulverized coal furnace for power generation of power station

Publications (1)

Publication Number Publication Date
CN115539937A true CN115539937A (en) 2022-12-30

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ID=84723747

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210598795.5A Pending CN115539937A (en) 2022-05-30 2022-05-30 Pulverized coal furnace for power generation of power station

Country Status (1)

Country Link
CN (1) CN115539937A (en)

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