A coal powder combustion device capable of efficient ash removal
By designing the air gun system in the coal powder combustion device, using high-pressure gas reverse air supply and spiral ejection technology, the problems of low efficiency and insufficient safety in boiler cleaning cinder are solved, and efficient and safe coal ash cleaning effect is achieved.
Patent Information
- Application Number
- CN202210679891.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-06-16
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2042-06-16
AI Technical Summary
Existing boilers need to stop combustion when cleaning cinders, resulting in inefficiency and the cleaning process may damage the inner wall of the boiler and even risk of explosion.
A coal powder combustion device is designed, including a boiler and an air cannon. The air cannon is connected to the chimney through the exhaust pipe, and uses high-pressure gas to send air in reverse, blowing coal ash off the inner wall of the boiler and the furnace gallbladder, and spraying out in a spiral shape through the vent holes to achieve cleaning without blind spots.
It realizes efficient removal of coal ash in the boiler, avoids the need for manual flushing, improves work efficiency, and enhances safety.
Smart Images
Figure CN114992653B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of boilers and relates to a combustion device, in particular to a pulverized coal combustion device capable of efficient ash removal. Background Art
[0002] Boilers play an important role in the development of industry. Although electric heating boilers are now available, the cost is high, so traditional coal-fired boilers still occupy an absolute position in the market. After the coal is burned, coal slag will be produced, which needs to be cleaned regularly. The existing boilers basically meet people's needs, but there are still some problems.
[0003] Problem 1: The existing boilers are cleaned of coal ash when not in use. When the boiler is used continuously for a long time, a large amount of coal ash will adhere to the inner tank and the inner wall of the boiler. If cleaning is required, the boiler needs to be stopped, causing the boiler to stop working. Cleaning the coal ash takes a lot of time, which reduces the working efficiency and practicality of the device.
[0004] Question 2: When cleaning the coal ash inside the boiler, it is necessary to spray water inside to avoid generating a large amount of dust. Such cleaning for a long time may damage the inner wall of the boiler and cause rust and corrosion. Sometimes, when the internal temperature is high, spraying water inside will generate a large amount of water vapor, which may cause the boiler to explode, greatly reducing the practicality and safety of the device. Summary of the invention
[0005] In view of the shortcomings of the existing technology, the present invention provides a coal powder combustion device capable of efficient ash cleaning, which is intended to solve the technical problem that the coal ash in the existing boiler is difficult to clean.
[0006] In order to achieve the above object, the technical solution adopted by the present invention is:
[0007] A pulverized coal combustion device capable of efficient ash cleaning comprises a cylindrical boiler, wherein the boiler comprises a smoke exhaust chamber, a combustion chamber and a coal ash chamber from top to bottom, wherein a furnace is arranged in the combustion chamber, and a chimney connected to the smoke exhaust chamber is provided on the top of the boiler, and the combustion device is characterized in that the combustion device also comprises an air cannon, an exhaust pipe is connected to the air outlet end of the air cannon, a disc-shaped connector is connected to the end of the exhaust pipe, the connector is detachably connected to the port of the chimney, a plurality of air vents are provided on the connector which penetrate the connector from top to bottom, the air vents are arranged around the axis of the connector and the intervals between two adjacent air vents are uniform, and the center lines of all the air vents are inclined along the direction around the axis of the connector.
[0008] This combustion device consists of two parts, namely a boiler and an air cannon. When the boiler is working normally, the air cannon is not connected to the boiler, and the chimney of the boiler is open. The coal burns normally to heat the water in the furnace, and the smoke after combustion is discharged from the chimney. When it is necessary to clean the coal ash, we connect the air outlet of the air cannon to the chimney. Turning on the air cannon can reverse the air supply to the chimney, input high-pressure gas into the boiler to blow or shake off the coal ash in the boiler from the inner wall of the boiler and the outer surface of the furnace. The coal ash enters the coal ash chamber together with the high-pressure gas that passes through quickly and settles. The air cannon is used to repeatedly blast the inner cavity of the boiler, which can take away most of the coal ash. This design does not require manual flushing of the boiler. The air cannon can be directly connected to the chimney to blast the boiler. The operation is very simple and the cleaning effect is good.
[0009] The air cannon of the present design is connected to the chimney through an exhaust pipe, and the exhaust pipe and the chimney are connected through a connecting piece. The connecting piece is uniquely designed and has a plurality of air holes surrounding the axis of the connecting piece. The high-pressure gas emitted by the air cannon can enter each air hole equally and then be guided into the chimney through the air holes. Moreover, the air holes of the present design are all opened obliquely, and the specific inclination direction is the circumferential direction surrounding the axis of the connecting piece, and the center lines of all the air holes are inclined in the same direction in a clockwise direction or a counterclockwise direction, so that the high-pressure gas that enters each air hole equally can be guided by the air holes and ejected in a spiral shape, and multiple strands of high-pressure gas spirally injected into the inner cavity of the boiler can spiral downward along the inner cavity wall of the boiler, and can greatly remove the coal ash attached to the inner cavity wall of the boiler, and the multiple spiral high-pressure gases can clean the coal ash in the boiler without dead ends. Such a clever design structure can clean the coal ash more cleanly while also improving the efficiency of cleaning the coal ash.
[0010] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, the end of the exhaust pipe is fixed to the connector via a flange and the outlet of the exhaust pipe is located above the upper openings of all the vents, and the lower openings of all the vents are directly opposite to the port of the chimney.
[0011] The exhaust pipe outlet of this design is directly opposite to all the vents, which can ensure that the high-pressure gas coming out of the exhaust pipe can enter the vents in equal parts to the greatest extent, and there is a chimney port at the lower empty part of the vent, so the connecting piece plays a diversion role, which can divide the high-pressure gas coming out of the exhaust pipe into equal parts and divert the gas that is ejected in multiple spirals. The multiple gases spiral down along the inner wall of the cylindrical boiler, which can make the cleaning cleaner and achieve cleaning without dead angles.
[0012] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, the sum of the diameters between two adjacent vent holes is greater than the radius of the connecting piece and the sum of the diameters between two adjacent vent holes is less than the diameter of the connecting piece.
[0013] The sum of the diameters of the two vents is smaller than the diameter of the connector and larger than the radius of the connector. This design means that the size of the vents should be as large as possible so that more high-pressure gas can pass through instantly, resulting in better cleaning effect.
[0014] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, a mounting portion 1 protrudes from the outer circumferential surface of the upper end of the connecting piece along its circumferential direction, a plurality of bolt holes 1 are opened on the mounting portion 1 along its circumferential direction, and the flange is fixed to the mounting portion 1 by bolts passing through the bolt holes 1, and a mounting portion 2 protrudes from the outer circumferential surface of the lower end of the connecting piece along its circumferential direction, a plurality of bolt holes 2 are opened on the mounting portion 2 along its circumferential direction, and the mounting portion 2 is fixed to the end of the chimney by bolts passing through the bolt holes 2.
[0015] The connectors of this design are connected and fixed to the exhaust pipe and chimney by bolts. This connection method is simple and easy to disassemble. When not in use, the connectors can be directly removed from the chimney. The entire boiler burns normally to heat water. When the boiler needs to be cleaned, the connectors can be directly reconnected. This is very convenient to operate.
[0016] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, the furnace core is located at the center of the middle of the combustion chamber, the furnace core is conical and the diameter of the furnace core gradually increases from top to bottom, and the furnace core is provided with a water inlet pipe and a water outlet pipe connected to the outside.
[0017] The furnace of the present design is in a cone shape with a small upper end and a large lower end. This design has three advantages: first, the large bottom of the furnace can have a larger contact area with the flame of the burning coal, which makes the heating speed and efficiency higher; second, the furnace bottom is large and the upper end is small, so that the burned coal ash will be blocked by the bottom of the furnace first and most of it will adhere to the bottom of the furnace, so that the coal ash attached to the side wall of the furnace can be less, which can reduce the number of cleaning times and the difficulty of cleaning, and it is convenient to clean; third, the air cannon of the present design inputs high-pressure gas from the chimney, and when the high-pressure gas moves from top to bottom, it contacts the outer side surface of the cone of the furnace and can be guided to flow downward along the outer side surface of the cone, so that the coal ash attached to the outer side surface of the cone of the furnace can be taken away to a great extent. This design is very convenient for cleaning the coal ash on the furnace.
[0018] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, the bottom surface of the furnace is flat, a coal inlet is provided on the side of the boiler located in the combustion chamber, the position of the coal inlet is slightly lower than the position of the bottom surface of the furnace, and a gate valve capable of controlling opening and closing is installed at the coal inlet.
[0019] The coal inlet of the combustion chamber of this design is slightly lower than the bottom surface of the furnace, and the bottom surface of the furnace is a horizontal plane. The coal inlet is slightly lower than the bottom surface of the furnace, which means that we can directly observe the bottom surface of the furnace through the coal inlet. If there is a lot of coal ash attached to the bottom of the furnace, we can directly use a shovel to reach into the combustion chamber from the coal inlet to rub and clean the bottom of the furnace. This design makes it convenient for us to observe the condition of the furnace and clean the coal ash from the bottom of the furnace.
[0020] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, an air injection pipe is installed in the combustion chamber below the furnace along the circumference of the combustion chamber inner wall, and a fan connected to the air injection pipe is installed outside the boiler.
[0021] The combustion chamber of this design is also equipped with an air injection pipe. The design of the air injection pipe can inject ignition gas when the coal is burning, which can make the coal burn more completely and reduce the generation of coal ash, effectively reducing the number of times we need to clean it.
[0022] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, a grate is provided between the combustion chamber and the ash chamber to separate the two.
[0023] The grate separates the combustion chamber from the coal ash chamber, so that the coal cannot fall into the coal ash chamber, but the coal ash can fall into the coal ash chamber from the gap on the grate. The structure is simple and very practical.
[0024] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, an ash discharge port is provided on the side of the ash chamber of the boiler, and a door panel is rotatably connected to the ash discharge port.
[0025] When it is necessary to clean the coal ash in the boiler, the ash discharge port needs to be kept open, so that the gas bombarded into the boiler by the air cannon can eventually flow out from the ash discharge port carrying the coal ash, making it easier for us to clean the coal ash.
[0026] In the above-mentioned pulverized coal combustion device capable of efficient ash cleaning, a heat exchange tube is installed in the smoke exhaust chamber and the heat exchange tube is vertically arranged in a wave shape in the smoke exhaust chamber.
[0027] The boiler of this design is also designed with a heat recovery device, namely a heat exchange tube, in the smoke exhaust chamber. Both ends of the heat exchange tube extend out of the boiler. The combustion temperature in the combustion chamber is very high, and the smoke discharged also has a high temperature. Therefore, the heat exchange tube is arranged in the smoke exhaust chamber to heat the water in the heat exchange tube, which can further recover heat.
[0028] Beneficial effects of the present invention:
[0029] 1. This combustion device consists of two parts, namely a boiler and an air cannon. When the boiler is working normally, the air cannon is not connected to the boiler, and the chimney of the boiler is open. The coal burns normally to heat the water in the furnace, and the smoke after combustion is discharged from the chimney. When it is necessary to clean the coal ash, we connect the air outlet of the air cannon to the chimney. Turning on the air cannon can reverse the air supply to the chimney, and input high-pressure gas into the boiler to blow or shake off the coal ash in the boiler from the inner wall of the boiler and the outer surface of the furnace. The coal ash enters the coal ash chamber together with the high-pressure gas that passes through quickly and settles. The air cannon is used to repeatedly flush the inner cavity of the boiler, which can take away most of the coal ash. This design does not require manual flushing of the boiler. The air cannon can be directly connected to the chimney to flush the boiler. The operation is very simple and the cleaning effect is good.
[0030] 2. The air cannon of the present design is connected to the chimney through an exhaust pipe, and the exhaust pipe and the chimney are connected through a connector. The connector is uniquely designed and has a number of vents surrounding the axis of the connector. The high-pressure gas emitted by the air cannon can enter each vent equally and then be guided into the chimney through the vents. Moreover, the vents of the present design are all obliquely opened, and the specific inclination direction is the circumferential direction surrounding the axis of the connector, and the center lines of all the vents are inclined in the same direction in a clockwise direction or a counterclockwise direction, so that the high-pressure gas equally entering each vent can be guided by the vents and ejected in a spiral shape, and multiple strands of high-pressure gas spirally injected into the boiler cavity can spiral downward along the boiler cavity wall, which can greatly remove the coal ash attached to the boiler cavity wall, and the multiple spiral high-pressure gas can clean the coal ash in the boiler without dead ends. The design structure is ingenious, and the coal ash is cleaned more cleanly while also improving the efficiency of cleaning the coal ash. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a structural diagram of the present invention;
[0032] Figure 2 A top view of the connector of the present invention;
[0033] Figure 3 It is a partial cross-sectional view of the connecting piece of the present invention.
[0034] In the figure, 1. boiler; 11. smoke exhaust chamber; 12. combustion chamber; 13. ash chamber; 14. chimney; 15. coal inlet; 16. ash outlet; 17. door panel; 2. furnace; 21. water inlet pipe; 22. water outlet pipe; 3. air cannon; 4. exhaust pipe; 5. connector; 51. vent hole; 52. mounting part 1; 53. bolt hole 1; 54. mounting part 2; 6. gate valve; 7. air injection pipe; 8. fan; 9. grate; 10. hot and cold exchange pipe. DETAILED DESCRIPTION
[0035] like Figure 1 , Figure 2 and Figure 3 A pulverized coal combustion device capable of efficient ash removal is shown, comprising a cylindrical boiler 1, wherein the boiler 1 comprises a smoke exhaust chamber 11, a combustion chamber 12 and a coal ash chamber 13 from top to bottom, wherein a furnace 2 is arranged in the combustion chamber 12, and the top of the boiler 1 has a chimney 14 connected to the smoke exhaust chamber 11, and the combustion device also comprises an air cannon 3, wherein an exhaust pipe 4 is connected to the air outlet end of the air cannon 3, wherein a disc-shaped connector 5 is connected to the end of the exhaust pipe 4, wherein the connector 5 is detachably connected to the port of the chimney 14, and wherein the connector 5 is provided with four vents 51 penetrating the connector 5 from top to bottom, wherein the vents 51 are arranged around the axis of the connector 5 and the intervals between two adjacent vents 51 are uniform, and the center lines of all the vents 51 are arranged at an angle of 45 degrees and are all inclined along the direction around the axis of the connector 5. The combustion device comprises two parts, namely, the boiler 1 and the air cannon 3. When the boiler 1 is working normally, the air cannon 3 is not connected to the boiler 1, and the chimney 14 of the boiler 1 is open. The coal burns normally to heat the water in the furnace 2, and the smoke after combustion is discharged from the chimney 14. When it is necessary to clean the coal ash, we connect the air outlet of the air cannon 3 to the chimney 14. Turning on the air cannon 3 can reverse the air supply to the chimney 14, input high-pressure gas into the boiler 1, and blow or shake off the coal ash in the boiler 1 from the inner wall of the boiler 1 and the outer surface of the furnace 2. The coal ash enters the coal ash chamber 13 together with the high-pressure gas that passes quickly and settles. The air cannon 3 repeatedly washes the inner cavity of the boiler 1, which can take away most of the coal ash. This design does not require manual flushing of the boiler 1. The air cannon 3 can be directly connected to the chimney 14 to wash the boiler 1. The operation is very simple and the cleaning effect is good. The air cannon 3 of the present invention is connected to the chimney 14 through the exhaust pipe 4, and the exhaust pipe 4 and the chimney 14 are connected through the connector 5. The connector 5 is uniquely designed and has a plurality of vents 51 surrounding the axis of the connector 5. The high-pressure gas emitted by the air cannon 3 can be equally divided into each vent 51 and then guided into the chimney 14 through the vent 51. Moreover, the vents 51 of the present invention are all obliquely opened, and the specific oblique direction is the circumferential direction surrounding the axis of the connector 5, and all the vents 51 are inclined. The center lines are all inclined in the same direction in the clockwise direction or the counterclockwise direction, so that the high-pressure gas that enters each vent hole 51 equally can be ejected in a spiral shape through the guidance of the vent hole 51, and multiple streams of high-pressure gas spirally injected into the inner cavity of the boiler 1 can spiral downward along the inner cavity wall of the boiler 1, which can greatly remove the coal ash attached to the inner cavity wall of the boiler 1, and the multiple spiral high-pressure gases can clean the coal ash in the boiler 1 without dead ends. This design structure is ingenious, and the coal ash is cleaned more cleanly while also improving the efficiency of cleaning the coal ash.
[0036] The end of the exhaust pipe 4 is fixed to the connector 5 through a flange, and the outlet of the exhaust pipe 4 is above the upper openings of all the vents 51, and the lower openings of all the vents 51 are directly opposite to the port of the chimney 14. The outlet of the exhaust pipe 4 of this design is directly opposite to all the vents 51, so that it can ensure that the high-pressure gas coming out of the exhaust pipe 4 can be equally divided into the vents 51 to a great extent, and the port of the chimney 14 is connected at the lower empty opening of the vents 51, so that the connector 5 plays a diversion role, which can equally divide the high-pressure gas coming out of the exhaust pipe 4 and divert the gas ejected in multiple spirals. The multiple gases spirally descend along the inner wall of the cylindrical boiler 1, which can make the cleaning cleaner and achieve no dead angle cleaning. The sum of the diameters between two adjacent vents 51 is greater than the radius of the connector 5, and the sum of the diameters between two adjacent vents 51 is less than the diameter of the connector 5. The sum of the diameters of the two vent holes 51 is smaller than the diameter of the connector 5 and larger than the radius of the connector 5. This design means that the size of the vent holes 51 is made as large as possible so that more high-pressure gas can pass through instantly, resulting in a better cleaning effect.
[0037] A mounting part 1 52 is protruded from the outer circumferential surface of the upper end of the connecting member 5 along its circumferential direction, and a plurality of bolt holes 1 53 are opened on the mounting part 1 52 along its circumferential direction. The flange is fixed to the mounting part 1 52 by passing bolts through the bolt holes 1 53. A mounting part 2 54 is protruded from the outer circumferential surface of the lower end of the connecting member 5 along its circumferential direction, and a plurality of bolt holes 2 are opened on the mounting part 2 54 along its circumferential direction. The mounting part 2 54 is fixed to the end of the chimney 14 by passing bolts through the bolt holes 2. The connecting member 5 of the present design is connected and fixed to the exhaust pipe 4 and the chimney 14 by bolts. This connection method is simple and convenient to disassemble. When not in use, the connecting member 5 is directly disassembled from the chimney 14, and the entire boiler 1 burns normally to heat water. When the boiler 1 needs to be cleaned, the connecting member 5 is directly reconnected, which is very convenient to operate. The furnace 2 is located at the center of the middle of the combustion chamber 12. The furnace 2 is conical and the diameter of the furnace 2 gradually increases from top to bottom. The furnace 2 is provided with a water inlet pipe 21 and a water outlet pipe 22 connected to the outside. The furnace 2 of the present design is conical and has a small upper end and a large lower end. This design has three advantages: first, the furnace 2 has a large bottom and a large contact area with the flame of the coal combustion, which makes the heating speed and efficiency higher; second, the furnace 2 has a large bottom and a small upper end, so that the coal ash burned out will be blocked by the bottom of the furnace 2 first and most of it will adhere to the bottom of the furnace 2. In this way, the coal ash attached to the side wall of the furnace 2 is less, which can reduce the number of cleaning times and the difficulty of cleaning, and it is convenient to clean; third, the air cannon 3 of the present design inputs high-pressure gas from the chimney 14. When the high-pressure gas moves from top to bottom, it contacts the outer side of the conical shape of the furnace 2 and can guide the flow downward along the outer side of the conical shape, so that the coal ash attached to the outer side of the conical shape of the furnace 2 can be taken away to a great extent. This design is very convenient to clean the coal ash on the furnace 2. The bottom surface of the furnace 2 is a plane, and a coal inlet 15 is provided on the side of the boiler 1 at the combustion chamber. The position of the coal inlet 15 is slightly lower than the position of the bottom surface of the furnace 2, and a gate valve 6 capable of controlling opening and closing is installed at the coal inlet 15. The coal inlet 15 of the combustion chamber 12 of this design is slightly lower than the bottom surface of the furnace 2, and the bottom surface of the furnace 2 is a horizontal plane. The fact that the coal inlet 15 is slightly lower than the bottom surface of the furnace 2 means that we can directly observe the bottom surface of the furnace 2 through the coal inlet 15. If there is a lot of coal ash attached to the bottom surface of the furnace 2, we can directly use a shovel to extend from the coal inlet 15 into the combustion chamber 12 to rub and clean the bottom of the furnace 2. This design makes it convenient for us to observe the situation of the furnace 2 and to clean the coal ash at the bottom of the furnace 2. An air injection pipe 7 is installed in the combustion chamber 12 below the furnace 2 along the inner wall of the combustion chamber 12, and a fan 8 connected to the air injection pipe 7 is installed outside the boiler 1. The combustion chamber 12 of the present invention is also provided with an injection pipe 7, which can inject ignition gas when the coal is burning, so that the coal can be burned more fully and the generation of coal ash can be reduced, which effectively reduces the number of cleaning times. A grate 9 is provided between the combustion chamber 12 and the coal ash chamber 13 to separate the two.The grate 9 separates the combustion chamber 12 and the ash chamber 13, so that the coal cannot fall into the ash chamber 13, but the ash can fall into the ash chamber 13 from the gap on the grate 9. The structure is simple and very practical. An ash discharge port 16 is provided on the side of the ash chamber 13 of the boiler 1, and a door panel 17 is rotatably connected to the ash discharge port 16. When it is necessary to clean the ash in the boiler 1, the ash discharge port 16 needs to be kept open, so that the gas blasted into the boiler 1 by the air cannon 3 can eventually flow out from the ash discharge port 16 carrying the ash, which is convenient for us to clean the ash. The heat exchange pipe 10 is installed in the smoke exhaust chamber 11, and the heat exchange pipe 10 is vertically arranged in the smoke exhaust chamber 11 in a wave shape. The boiler 1 of the present design is also designed with a heat recovery device, namely a heat exchange tube 10, in the smoke exhaust chamber 11. Both ends of the heat exchange tube 10 extend out of the boiler 1. The combustion temperature in the combustion chamber is very high, and the smoke discharged therefrom also has a relatively high temperature. Therefore, the heat exchange tube 10 is arranged in the smoke exhaust chamber 11 to heat the water in the heat exchange tube 10 and further recover heat.
[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. At the same time, the basic principles, main features and advantages of the present invention are shown and described above, which should be understood by technicians in this industry.
Claims
1. A pulverized coal combustion device capable of efficient ash removal, comprising a cylindrical boiler (1), wherein the boiler (1) comprises a smoke exhaust chamber (11), a combustion chamber (12) and a coal ash chamber (13) from top to bottom, wherein a furnace (2) is arranged in the combustion chamber (12), and the top of the boiler (1) is provided with a chimney (14) connected to the smoke exhaust chamber (11), wherein the boiler (1) is characterized in that: The combustion device also includes an air cannon (3), the air outlet end of the air cannon (3) is connected to an exhaust pipe (4), the end of the exhaust pipe (4) is connected to a disc-shaped connecting piece (5), the connecting piece (5) is detachably connected to the port of the chimney (14), the connecting piece (5) is provided with a plurality of vent holes (51) penetrating the connecting piece (5) from top to bottom, the vent holes (51) are all arranged around the axis of the connecting piece (5), and the intervals between two adjacent vent holes (51) are uniform, and the center lines of all the vent holes (51) are inclined along the direction around the axis of the connecting piece (5); The end of the exhaust pipe (4) is fixed to the connecting piece (5) via a flange, and the outlet of the exhaust pipe (4) is located above the upper openings of all the vent holes (51), and the lower openings of all the vent holes (51) are directly opposite to the port of the chimney (14); The sum of the diameters of two adjacent vent holes (51) is greater than the radius of the connecting member (5), and the sum of the diameters of two adjacent vent holes (51) is less than the diameter of the connecting member (5); A mounting portion (52) protrudes from the outer circumferential surface of the upper end of the connecting member (5) along its circumferential direction, and a plurality of bolt holes (53) are opened on the mounting portion (52) along its circumferential direction. The flange is fixed to the mounting portion (52) by bolts passing through the bolt holes (53). A mounting portion (54) protrudes from the outer circumferential surface of the lower end of the connecting member (5) along its circumferential direction, and a plurality of bolt holes (54) are opened on the mounting portion (54) along its circumferential direction. The mounting portion (54) is fixed to the end of the chimney (14) by bolts passing through the bolt holes.
2. A pulverized coal combustion device capable of efficient ash removal as claimed in claim 1, characterized in that: The furnace (2) is located at the center of the combustion chamber (12). The furnace (2) is conical and the diameter of the furnace (2) gradually increases from top to bottom. The furnace (2) is provided with a water inlet pipe (21) and a water outlet pipe (22) that are connected to the outside.
3. A pulverized coal combustion device capable of efficient ash cleaning as claimed in claim 2, characterized in that: The bottom surface of the furnace (2) is a plane, and a coal inlet (15) is provided on the side of the boiler (1) at the combustion chamber. The position of the coal inlet (15) is slightly lower than the position of the bottom surface of the furnace (2), and a gate valve (6) capable of controlling opening and closing is installed at the coal inlet (15).
4. A pulverized coal combustion device capable of efficient ash removal as claimed in claim 3, characterized in that: An air injection pipe (7) is installed in the combustion chamber (12) below the furnace (2) and along the circumference of the inner wall of the combustion chamber (12), and a fan (8) connected to the air injection pipe (7) is installed outside the boiler (1).
5. A pulverized coal combustion device capable of efficient ash cleaning as claimed in claim 4, characterized in that: A grate (9) is provided between the combustion chamber (12) and the coal ash chamber (13) to separate the two.
6. A pulverized coal combustion device capable of efficient ash removal as claimed in claim 5, characterized in that: An ash discharge port (16) is provided on the side of the coal ash chamber (13) of the boiler (1), and a door panel (17) is rotatably connected to the ash discharge port (16).
7. A pulverized coal combustion device capable of efficient ash cleaning as claimed in claim 6, characterized in that: A heat exchange pipe (10) is installed in the smoke exhaust chamber (11), and the heat exchange pipe (10) is vertically arranged in a wave shape in the smoke exhaust chamber (11).
Citation Information
Patent Citations
Boiler convenient to clean clearance cinder
CN206618109U
Ash removal equipment
CN214370288U