Gasification tiny-oil ignition device of coal-fired boiler

Abstract

The invention relates to the technical field of boiler ignition, in particular to a coal-fired boiler gasification tiny-oil ignition device which comprises a first air pipe and a second air pipe, a thick pulverized coal supply pipe and a first air pipe are arranged on the outer end wall of a first air duct, a thin pulverized coal supply pipe is arranged on the outer edge face of a second air duct, and an oil injector is arranged at an oil inlet pipe. A synchronous propelling mechanism is arranged outside the first air duct; an igniter is arranged on the inner wall of the first air cylinder, oil mist is jetted at the same time through a plurality of oil sprayers arranged in a surrounding mode to form a round flame area, then the igniter is started to rapidly ignite jetted fuel gas, and then concentrated-phase pulverized coal enters the first air cylinder through a concentrated-phase pulverized coal supply pipe. And through cooperation of the first air pipe, sufficient oxygen is conveyed into the first air barrel to be supplied, so that it is guaranteed that dense-phase pulverized coal can be ignited in a high-temperature flame area, and the combustion rate of the pulverized coal is greatly increased.

Description

Technical Field

[0001] The invention relates to the technical field of boiler ignition, in particular to a gasification micro-oil ignition device for a coal-fired boiler. Background Art

[0002] The coal-fired boiler gasification micro-oil ignition device is an ignition system for coal-fired boilers, which is designed to improve the efficiency of boiler startup and operation. The device sprays a small amount of liquid oil into the combustion chamber in the boiler, using the rapid ignition characteristics of the oil to ignite the coal powder, thereby achieving coal combustion.

[0003] CN201922063588.6 discloses a coal-fired boiler gasification ignition device, which specifically includes a burner and a micro-oil gasification oil gun installed in the burner. A secondary air duct is installed at the end of the primary air duct of the burner, and an air distribution mechanism is installed between the secondary air duct and the primary air duct. The air distribution mechanism is connected to the secondary air duct. A primary combustion chamber and a secondary combustion chamber are installed in the primary air duct. The primary air duct, the primary combustion chamber and the secondary combustion chamber are coaxially arranged. The end of the primary combustion chamber is equipped with a secondary combustion chamber. The primary combustion chamber and the secondary combustion chamber are respectively fixed in the primary air duct by annular support blocks. The end of the primary combustion chamber and the front end of the secondary combustion chamber form an air compensation cavity. An air connecting pipe is arranged on the air compensation cavity. The air connecting pipe is connected to the secondary air duct. A micro-oil gasification oil gun is installed at the bottom of the primary air duct.

[0004] The micro-oil gasification oil gun that appears in the operation process of the above patent is a device that sprays oil mist into the combustion chamber. Since the oil gun is mostly fixed in the igniter and needs to be used repeatedly, after the oil gun ignites the gas, the oil gun needs to be always inside the high-temperature burner, resulting in a reduced service life of the spray gun. In order to solve this problem, a coal-fired boiler gasification micro-oil ignition device needs to be proposed. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a coal-fired boiler gasification micro-oil ignition device to solve the technical problem that the oil gun is always in a high-temperature burner, resulting in a reduced service life of the spray gun.

[0006] Based on the above purpose, the present invention provides a coal-fired boiler gasification micro-oil ignition device, comprising a first air duct and a second air duct, wherein the second air duct is arranged at the end of the first air duct; An oil inlet pipe is provided at the outer wall of the first air cylinder, and the oil inlet pipe is arranged around the axis of the first air cylinder; The outer end wall of the first air duct is provided with a concentrated coal powder supply pipe and a first air pipe, both of which are connected to the interior of the first air duct; the outer edge surface of the second air duct is provided with a lean coal powder supply pipe, which is connected to the interior of the first air duct; The oil inlet pipe is provided with an injector, and the injector corresponds to the oil inlet pipe; A synchronous propulsion mechanism is disposed outside the first wind tube, and the synchronous propulsion mechanism is used to control the distance between the injector and the axis of the first wind tube; An igniter is arranged on the inner wall of the first wind tube, and the igniter is far away from the second wind tube.

[0007] Preferably, the synchronous propulsion mechanism includes a connecting plate and a slewing ring, the igniter is mounted on the connecting plate, and the igniter is fixedly connected to the connecting plate, a connecting rod is arranged on the connecting plate, and the connecting rod is symmetrically arranged along the axial plane of the connecting plate, the connecting plate is located at the outer port of the oil inlet pipe, and the connecting rod at the bottom of the connecting plate is slidably connected to the oil inlet pipe; The slewing ring is sleeved outside the first wind tube, and the slewing ring is rotatably connected to the first wind tube. A connecting rod is provided on the inner edge surface of the slewing ring, one end of the connecting rod is hinged to the inner wall of the slewing ring, and the other end of the connecting rod is hinged to the connecting plate; The synchronous propulsion mechanism also includes a rotary driver, which is installed on the outside of the first wind cylinder. The rotary driver is used to control the rotation of the slewing ring, thereby driving the injector on the connecting plate to move along the oil inlet pipe through the connecting rod.

[0008] Preferably, the rotary driver comprises an annular frame sleeved on the outside of the first wind tube, and the annular frame is fixedly connected to the first wind tube; The end wall of the slewing ring is provided with a connecting piece, and the connecting piece is fixedly connected to the slewing ring, and the connecting piece is rotatably connected to the annular frame via a bearing; The slewing ring is sleeved with a gear ring, and the gear ring is fixedly connected to the slewing ring; The rotary driver also includes a servo motor, which is installed outside the first air cylinder. The output shaft of the servo motor is provided with a gear, which is meshed with a gear ring.

[0009] Preferably, the ignition device further comprises a connecting tube, which is located inside the first air tube and is fixedly connected to the end of the oil inlet pipe; The end wall of the connecting tube is provided with a baffle, and the baffle is symmetrically arranged along the axial plane, and the baffle is connected to the connecting tube through a hinge, and the hinge is located at the center of the outer edge surface; The connecting rod passes through the side wall of the connecting tube, and a first ball is arranged at the bottom end of the connecting rod, and the first ball contacts the surface of the baffle; An elastic element is arranged between the connecting tube and the baffle, and the elastic element is used to control the baffle to close the bottom opening of the connecting tube.

[0010] Preferably, a guide path is provided on the surface of the baffle plate, and the guide path is distributed along the path from the axis of the baffle plate to the center point of the outer arc; The guide path is inclined, the high point of the guide path contacts the first ball, and the low point of the guide path is close to the axis of the baffle.

[0011] Preferably, an arc groove is provided on the connecting tube, and the arc groove is arranged around the axis of the connecting tube; The elastic element includes a movable rod, the top end of which is located inside the arc groove; A second ball is disposed at the bottom end of the movable rod, a hole groove is provided on the upper surface of the baffle plate, and the second ball is connected to the ball head of the hole groove of the baffle plate; A tension spring is arranged at the top end of the movable rod, one end of the tension spring is connected to the top end of the movable rod, and the other end of the tension spring is connected to the inner top wall of the arc-shaped groove.

[0012] Preferably, a frame and a guide rod provided on the frame are provided outside the first air duct, and the guide rod is fixedly connected to the frame; A threaded rod is also provided on the frame outside the first air duct, and the threaded rod is rotatably connected to the frame, a coupling is provided at one end of the threaded rod, and the threaded rod is transmission-connected to the output shaft of the servo motor through the coupling; The ignition device also includes a connecting frame, the guide rod penetrates the connecting frame and is slidably connected with the connecting frame, one end of the connecting frame is fixedly connected with the igniter, and the other end of the connecting frame is threadedly connected with the threaded rod through a nut.

[0013] Preferably, the inner diameter of the second air tube is greater than the outer diameter of the first air tube, and the second air tube is sleeved on one end of the first air tube; A connecting ring is provided between the inner wall of the second air duct and the outer wall of the first air duct, an inner cavity is provided in the connecting ring, and a nozzle is provided on the end wall of the connecting ring facing the inside of the second air duct; A second air pipe is arranged between the first air pipe and the connecting ring, one end of the second air pipe is communicated with the first air pipe, and the other end of the second air pipe is communicated with the annular cavity of the connecting ring.

[0014] Beneficial effects of the present invention: The present invention sprays oil mist simultaneously through a plurality of surroundingly arranged fuel injectors to form a circular flame zone, and then starts the igniter. The electric spark igniter can generate a high-voltage arc to quickly ignite the ejected fuel gas, thereby forming a high-temperature flame zone in the first air duct, and then the dense phase coal powder enters the first air duct through the dense coal powder supply pipe, and with the cooperation of the first air pipe, a sufficient amount of oxygen is transported to the inside of the first air duct for oxygen supply, thereby ensuring that the high-temperature flame zone can complete the ignition of the dense phase coal powder, which will greatly improve the combustion rate of the coal powder, and even if any fuel injector is damaged, the ignition device will not be unable to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 is a side view of the present invention; Figure 3 for Figure 2 A magnified image of point A; Figure 4 It is a top view of a local state of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of a local state of the present invention; Figure 6 It is a schematic diagram of the internal structure of the synchronous propulsion mechanism of the present invention; Figure 7 The internal structure of the fuel injector and the connecting tube of the present invention is shown in FIG. Figure 1 ; Figure 8 The internal structure of the fuel injector and the connecting tube of the present invention is shown in FIG. Figure 2 ; Fig. 9 It is a schematic diagram of the internal structure of the first wind tube and the second wind tube of the present invention.

[0017] The numbers in the figure are: 1-first air cylinder; 11-oil inlet pipe; 12-rich coal powder supply pipe; 2-second air cylinder; 21-lean coal powder supply pipe; 3-first air pipe; 31-second air pipe; 4-connecting ring; 41-annular cavity; 5-injector; 6-synchronous propulsion mechanism; 61-connecting plate; 611-connecting rod; 612-first ball; 62-slewing ring; 621-connecting rod; 622-gear ring; 63-rotating driver; 631-annular frame; 632-connecting plate; 633-servo motor; 634-gear; 7-igniter; 8-connecting cylinder; 81-baffle; 811-guide way; 82-hinge; 83-elastic element; 831-movable rod; 832-second ball; 833-tension spring; 84-arc groove; 9-connecting frame; 91-guide rod; 92-threaded rod; 921-coupling. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] The first aspect of the present invention provides a coal-fired boiler gasification micro-oil ignition device, such as Figure 1 As shown, it includes a first air duct and a second air duct, and the second air duct is arranged at the end of the first air duct; An oil inlet pipe 11 is provided at the outer wall of the first air cylinder 1, and the oil inlet pipe 11 is arranged around the axis of the first air cylinder 1; The outer end wall of the first air duct 1 is provided with a concentrated coal powder supply pipe 12 and a first air pipe 3, both of which are connected to the interior of the first air duct 1; the outer edge surface of the second air duct 2 is provided with a lean coal powder supply pipe 21, which is connected to the interior of the first air duct 1; The fuel inlet pipe 11 is provided with a fuel injector 5, and the fuel injector 5 corresponds to the fuel inlet pipe 11; The first wind tube 1 is provided with a synchronous propulsion mechanism 6 outside, and the synchronous propulsion mechanism 6 is used to control the distance between the injector 5 and the axis of the first wind tube 1; An igniter 7 is disposed on the inner wall of the first wind tube 1 , and the igniter 7 is far away from the second wind tube 2 .

[0021] In this embodiment, the synchronous propulsion mechanism 6 is started before use, and the synchronous propulsion mechanism drives the injector 5 to move toward the axis of the first wind tube 1. The injectors 5 are specifically three in this solution but are not limited thereto. The multiple surrounding injectors 5 simultaneously spray oil mist to form a circular flame zone, which will greatly increase the combustion rate of the pulverized coal. Even if any of the injectors 5 is damaged, the ignition device will not fail to operate. When in use, the gasified fuel is delivered to the first air duct 1 through the fuel injector 5, and then the igniter 7 is started. The electric spark igniter 7 can generate a high-voltage arc to quickly ignite the ejected fuel gas, thereby forming a high-temperature flame zone in the first air duct 1. Then, the dense phase coal powder enters the first air duct 1 through the dense coal powder supply pipe 12, and a sufficient amount of oxygen is delivered to the first air duct 1 in cooperation with the first air pipe 3 to supply oxygen, thereby ensuring that the high-temperature flame zone can complete the ignition of the dense phase coal powder. And under the air flow transported by the first air pipe 3, the burning coal powder can be blown into the second wind duct 2, and the dilute coal powder enters the first wind duct 1 through the dilute coal powder supply pipe 21. The ignited dense phase coal powder is mixed with the dilute coal powder in the second wind duct 2 and ignites the dilute coal powder. When the coal powder is ignited, the injector 5 is closed and the burning coal powder is transported to the boiler through the guidance of the second wind duct 2.

[0022] As an implementation method, Figure 2 and Figure 3 As shown, further: The synchronous propulsion mechanism 6 includes a connecting plate 61 and a slewing ring 62. The igniter 7 is mounted on the connecting plate 61 and the igniter 7 is fixedly connected to the connecting plate 61. A connecting rod 611 is arranged on the connecting plate 61, and the connecting rod 611 is symmetrically arranged along the axial plane of the connecting plate 61. The connecting plate 61 is located at the outer end of the oil inlet pipe 11, and the connecting rod 611 at the bottom of the connecting plate 61 is slidably connected to the oil inlet pipe 11. The slewing ring 62 is sleeved on the outside of the first air cylinder 1, and the slewing ring 62 is rotatably connected to the first air cylinder 1. A connecting rod 621 is provided on the inner edge surface of the slewing ring 62. One end of the connecting rod 621 is hinged to the inner wall of the slewing ring 62, and the other end of the connecting rod 621 is hinged to the connecting plate 61. The synchronous propulsion mechanism 6 also includes a rotation driver 63, which is installed on the outside of the first wind tube 1. The rotation driver 63 is used to control the rotation of the slewing ring 62, thereby driving the injector 5 on the connecting plate 61 to move along the oil inlet pipe 11 through the connecting rod 621.

[0023] In this embodiment, the synchronous propulsion mechanism 6 starts to work, and the rotary driver 63 controls the slewing ring 62 to rotate along the first wind tube 1. Since the connecting plate 61 is slidingly connected to the oil inlet pipe 11 through the connecting rod 611, and the sliding direction is also consistent with the axial direction of the oil inlet pipe 11, the connecting plate 61 will be pushed downward along the oil inlet pipe 11 through the connecting rod 621 during the rotation of the slewing ring 62, and the connecting plate 61 will drive the injector 5 to move with it.

[0024] As an implementation method, Figure 4 and Figure 5 As shown, further: The rotary driver 63 includes an annular frame 631 sleeved on the outside of the first wind tube 1, and the annular frame 631 is fixedly connected to the first wind tube 1; The end wall of the slewing ring 62 is provided with a connecting piece 632, and the connecting piece 632 is fixedly connected to the slewing ring 62, and the connecting piece 632 is rotatably connected to the annular frame 631 through a bearing; The slewing ring 62 is sleeved with a gear ring 622, and the gear ring 622 is fixedly connected to the slewing ring 62; The rotary driver 63 further includes a servo motor 633 , which is installed outside the first air cylinder 1 . The output shaft of the servo motor 633 is provided with a gear 634 , which is meshed with the gear ring 622 .

[0025] In this embodiment, the rotary driver 63 is started, and the output shaft of the servo motor 633 drives the gear 634 to rotate. Since the gear 634 is meshed with the gear 634, the gear 634 will drive the ring gear 622 to rotate, and the ring gear 622 drives the slewing ring 62 to rotate along the first air cylinder 1. Since the connecting plate 61 is slidably connected to the oil inlet pipe 11 through the connecting rod 611, and the sliding direction is also consistent with the axial direction of the oil inlet pipe 11, the connecting plate 61 will be pushed downward along the oil inlet pipe 11 through the connecting rod 621 during the rotation of the slewing ring 62, and the connecting plate 61 will drive the injector 5 to move with it.

[0026] As an implementation method, Figures 6 to 8 As shown, further: The ignition device also includes a connecting tube 8, which is located inside the first air tube 1 and is fixedly connected to the end of the oil inlet pipe 11; The end wall of the connecting tube 8 is provided with a baffle 81, and the baffle 81 is symmetrically arranged along the axial plane, and the baffle 81 is connected to the connecting tube 8 through a hinge 82, and the hinge 82 is located at the center of the outer edge surface; The connecting rod 611 passes through the side wall of the connecting tube 8, and a first ball 612 is disposed at the bottom end of the connecting rod 611, and the first ball 612 contacts the surface of the baffle 81; An elastic element 83 is disposed between the connecting tube 8 and the baffle 81 , and the elastic element 83 is used to control the baffle 81 to close the bottom opening of the connecting tube 8 .

[0027] A guide path 811 is provided on the surface of the baffle 81, and the guide path 811 is distributed along a path from the axis of the baffle 81 to the center point of the outer arc; The guide path 811 is inclined, the high point of the guide path 811 contacts the first ball 612 , and the low point of the guide path 811 is close to the axis of the baffle 81 .

[0028] The connecting tube 8 is provided with an arc groove 84, and the arc groove 84 is arranged around the axis of the connecting tube 8; The elastic element 83 includes a movable rod 831, and the top end of the movable rod 831 is located inside the arc groove 84; The bottom end of the movable rod 831 is provided with a second ball 832, and a hole groove is opened on the upper surface of the baffle 81, and the second ball 832 is connected to the ball head of the hole groove of the baffle 81; A tension spring 833 is disposed at the top of the movable rod 831 , one end of the tension spring 833 is connected to the top of the movable rod 831 , and the other end of the tension spring 833 is connected to the inner top wall of the arc-shaped groove 84 .

[0029] In this embodiment, since the oil gun is mostly fixed in the igniter and needs to be used repeatedly, after the oil gun ignites the gas, the oil gun needs to be always inside the high-temperature burner, resulting in a reduced service life of the spray gun. The above-mentioned problem of the injector 5 can be further avoided by the following methods: The rotary driver 63 controls the slewing ring 62 to rotate along the first air cylinder 1. Since the connecting plate 61 is slidably connected to the oil inlet pipe 11 through the connecting rod 611, and the sliding direction is also consistent with the axial direction of the oil inlet pipe 11, the connecting rod 621 pushes the connecting plate 61 to move downward along the oil inlet pipe 11 during the rotation of the slewing ring 62, and the connecting rod 611 will also move with it. During the downward movement of the connecting rod 611, since the first ball 612 at the bottom end of the connecting rod 611 contacts the inner wall of the guide path 811 on the upper surface of the baffle 81, the baffle 81 will be pushed to turn over to overcome the elastic potential energy of the elastic element 83 during the downward movement of the connecting rod 611. After the two baffles 81 turn over towards each other at the same time, the bottom end of the connecting cylinder 8 will open, so that the oil inlet pipe 11 is connected to the inside of the first air cylinder 1. During the process of the connection rod 611 descending, the relative position of the connection point between the movable rod 831 and the baffle 81 and the connection tube 8 changes. During the process of the baffle 81 opening, the movable rod 831 will also descend to overcome the preload force of the tension spring 833. Since the relative position of the connection point between the movable rod 831 and the baffle 81 and the connection tube 8 changes, the second ball 832 is used to ensure that the baffle 81 remains connected to the movable rod 831 during the process of the movable rod 831 descending. The inclined setting of the guide path 811 ensures that the pressure of the connecting rod 611 can be guided during its descent, so as to ensure that the baffle 81 is opened smoothly and avoid the influence of stress on the baffle 81.

[0030] As an implementation method, Figure 4 As shown, further: The first air duct 1 is provided with a frame and a guide rod 91 provided on the frame, and the guide rod 91 is fixedly connected to the frame; A threaded rod 92 is also provided on the frame outside the first air duct 1, and the threaded rod 92 is rotatably connected to the frame, and a coupling 921 is provided at one end of the threaded rod 92, and the threaded rod 92 is drivingly connected to the output shaft of the servo motor 633 through the coupling 921; The ignition device further comprises a connecting frame 9, wherein the guide rod 91 penetrates the connecting frame 9 and is slidably connected thereto, one end of the connecting frame 9 is fixedly connected to the igniter 7, and the other end of the connecting frame 9 is threadedly connected to the threaded rod 92 via a nut.

[0031] In this embodiment, during the start-up of the servo motor 633, when the output shaft of the servo motor 633 drives the gear 634 to rotate, the output shaft of the servo motor 633 also drives the threaded rod 92 to rotate through the coupling 921. Since the threaded rod 92 is threadedly connected to the connecting frame 9 through a nut, the connecting frame 9 will be driven to move along the guide rod 91 during the rotation of the threaded rod 92. During the movement, the connecting frame 9 will drive the igniter 7 to move along the axis of the first air cylinder 1, so that the igniter 7 is close to the axis formed by the multiple injectors 5, and finally the oil mist is ignited by the igniter 7. By driving the igniter 7 to be movable, the igniter 7 will not be baked by the burning coal powder in the first air duct 1 when the oil mist is not ignited, thereby increasing the service life of the igniter 7.

[0032] As an implementation method, Fig. 9 As shown, further: The inner diameter of the second air tube 2 is greater than the outer diameter of the first air tube 1, and the second air tube 2 is sleeved on one end of the first air tube 1; A connecting ring 4 is provided between the inner wall of the second air tube 2 and the outer wall of the first air tube 1. An inner cavity is provided in the connecting ring 4. A nozzle is provided on the end wall of the connecting ring 4 facing the inside of the second air tube 2. A second air pipe 31 is provided between the first air pipe 3 and the connecting ring 4 . One end of the second air pipe 31 is communicated with the first air pipe 3 , and the other end of the second air pipe 31 is communicated with the annular cavity 41 of the connecting ring 4 .

[0033] In this embodiment, the first air pipe 3 cooperates to deliver sufficient oxygen to the first air duct 1 for oxygen supply, thereby ensuring that the high-temperature flame zone can ignite the dense phase coal powder; And under the air flow conveyed by the first air pipe 3, the burning coal powder can be blown into the second air duct 2, the dilute coal powder enters the first air duct 1 through the dilute coal powder supply pipe 21, and the ignited dense coal powder mixes with the dilute coal powder in the second air duct 2 and ignites the dilute coal powder; While supplying oxygen to the first air duct 1, the first air pipe 3 also injects air into the annular cavity 41 of the connecting ring 4 through the second air pipe 31, and finally sprays air from its nozzle into the interior of the second air duct 2 to provide it with oxygen required for combustion, and transports the burning pulverized coal to the boiler under the flow of air transported by the nozzle.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0035] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coal-fired boiler gasification micro-oil ignition device, characterized in that: It includes a first air duct and a second air duct, wherein the second air duct is arranged at the end of the first air duct; An oil inlet pipe (11) is provided at the beginning of the outer wall of the first air cylinder (1), and the oil inlet pipe (11) is arranged around the axis of the first air cylinder (1); The outer end wall of the first air cylinder (1) is provided with a concentrated coal powder supply pipe (12) and a first air pipe (3), both of which are in communication with the interior of the first air cylinder (1); the outer edge surface of the second air cylinder (2) is provided with a lean coal powder supply pipe (21), which is in communication with the interior of the first air cylinder (1); The oil inlet pipe (11) is provided with an injector (5), and the injector (5) corresponds to the oil inlet pipe (11); A synchronous propulsion mechanism (6) is arranged outside the first wind tube (1), and the synchronous propulsion mechanism (6) is used to control the distance between the injector (5) and the axis of the first wind tube (1); An igniter (7) is provided on the inner wall of the first wind tube (1), and the igniter (7) is far away from the second wind tube (2).

2. A coal-fired boiler gasification and micro-oil ignition device according to claim 1, characterized in that: The synchronous propulsion mechanism (6) comprises a connecting plate (61) and a slewing ring (62), the igniter (7) is mounted on the connecting plate (61), and the igniter (7) is fixedly connected to the connecting plate (61), a connecting rod (611) is provided on the connecting plate (61), and the connecting rod (611) is symmetrically arranged along the axial plane of the connecting plate (61), the connecting plate (61) is located at an outer end of the oil inlet pipe (11), and the connecting rod (611) at the bottom of the connecting plate (61) is slidably connected to the oil inlet pipe (11); The slewing ring (62) is sleeved on the outside of the first air cylinder (1), and the slewing ring (62) is rotatably connected to the first air cylinder (1); a connecting rod (621) is provided on the inner edge surface of the slewing ring (62); one end of the connecting rod (621) is hinged to the inner wall of the slewing ring (62), and the other end of the connecting rod (621) is hinged to the connecting plate (61); The synchronous propulsion mechanism (6) further comprises a rotary driver (63) which is mounted outside the first wind cylinder (1). The rotary driver (63) is used to control the rotation of the slewing ring (62), thereby driving the fuel injector (5) on the connecting plate (61) to move along the fuel inlet pipe (11) via the connecting rod (621).

3. A coal-fired boiler gasification and micro-oil ignition device according to claim 2, characterized in that: The rotary driver (63) comprises an annular frame (631) sleeved on the outside of the first wind cylinder (1), and the annular frame (631) is fixedly connected to the first wind cylinder (1); The end wall of the slewing ring (62) is provided with a connecting piece (632), and the connecting piece (632) is fixedly connected to the slewing ring (62), and the connecting piece (632) is rotatably connected to the annular frame (631) via a bearing; A gear ring (622) is sleeved on the slewing ring (62), and the gear ring (622) is fixedly connected to the slewing ring (62); The rotary driver (63) further comprises a servo motor (633), wherein the servo motor (633) is mounted outside the first air cylinder (1), and an output shaft of the servo motor (633) is provided with a gear (634), wherein the gear (634) meshes with the gear ring (622).

4. A coal-fired boiler gasification and micro-oil ignition device according to claim 2, characterized in that: The ignition device also includes a connecting cylinder (8), the connecting cylinder (8) is located inside the first air cylinder (1), and the connecting cylinder (8) is fixedly connected to the end of the oil inlet pipe (11); The end wall of the connecting tube (8) is provided with a baffle (81), and the baffle (81) is symmetrically arranged along the axial plane. The baffle (81) is connected to the connecting tube (8) via a hinge (82), and the hinge (82) is located at the center of the outer edge surface; The connecting rod (611) passes through the side wall of the connecting tube (8); a first rolling ball (612) is provided at the bottom end of the connecting rod (611), and the first rolling ball (612) is in contact with the surface of the baffle (81); An elastic element (83) is provided between the connecting tube (8) and the baffle (81), and the elastic element (83) is used to control the baffle (81) to close the bottom end opening of the connecting tube (8).

5. A coal-fired boiler gasification and micro-oil ignition device according to claim 1, characterized in that: A guide path (811) is provided on the surface of the baffle plate (81), and the guide path (811) is distributed along a path from the axis of the baffle plate (81) to the center point of the outer arc; The guide path (811) is inclined, the high point of the guide path (811) is in contact with the first ball (612), and the low point of the guide path (811) is close to the axis of the baffle (81).

6. A coal-fired boiler gasification and micro-oil ignition device according to claim 4, characterized in that: An arc-shaped groove (84) is provided on the connecting tube (8), and the arc-shaped groove (84) is arranged around the axis of the connecting tube (8); The elastic element (83) comprises a movable rod (831), the top end of the movable rod (831) being located inside the arc-shaped groove (84); A second ball (832) is disposed at the bottom end of the movable rod (831); a hole groove is provided on the upper surface of the baffle plate (81); and the second ball (832) is connected to the ball head of the hole groove of the baffle plate (81); A tension spring (833) is provided at the top end of the movable rod (831), one end of the tension spring (833) is connected to the top end of the movable rod (831), and the other end of the tension spring (833) is connected to the inner top wall of the arc-shaped groove (84).

7. A coal-fired boiler gasification and micro-oil ignition device according to claim 3, characterized in that: The first air cylinder (1) is provided with a frame and a guide rod (91) provided on the frame outside, and the guide rod (91) is fixedly connected to the frame; A threaded rod (92) is also provided on the frame outside the first air cylinder (1), and the threaded rod (92) is rotatably connected to the frame, a coupling (921) is provided at one end of the threaded rod (92), and the threaded rod (92) is drivingly connected to the output shaft of the servo motor (633) via the coupling (921); The ignition device also includes a connecting frame (9), the guide rod (91) passes through the connecting frame (9) and is slidably connected thereto, one end of the connecting frame (9) is fixedly connected to the igniter (7), and the other end of the connecting frame (9) is threadedly connected to the threaded rod (92) via a nut.

8. A coal-fired boiler gasification and micro-oil ignition device according to claim 1, characterized in that: The inner diameter of the second air tube (2) is greater than the outer diameter of the first air tube (1), and the second air tube (2) is sleeved on one end of the first air tube (1); A connecting ring (4) is provided between the inner wall of the second air tube (2) and the outer wall of the first air tube (1), an inner cavity is provided in the connecting ring (4), and a nozzle is provided on the end wall of the connecting ring (4) facing the interior of the second air tube (2); A second air pipe (31) is provided between the first air pipe (3) and the connecting ring (4); one end of the second air pipe (31) is in communication with the first air pipe (3), and the other end of the second air pipe (31) is in communication with the annular cavity (41) of the connecting ring (4).

Images