Barium salt rotary kiln pulverized coal burner

Abstract

The invention relates to a barium salt rotary kiln pulverized coal burner which comprises an axial flow air cylinder, a rotational flow air outer cylinder, a rotational flow air inner cylinder and an air cylinder, a central air channel is formed in the air cylinder, a coal air channel is formed between the rotational flow air inner cylinder and the air cylinder, a rotational flow air channel is formed between the rotational flow air outer cylinder and the rotational flow air inner cylinder, and an axial flow air channel is formed between the axial flow air cylinder and the rotational flow air outer cylinder; a supporting block is arranged in each air duct, each supporting block is provided with a through hole with the axis parallel to the axis of the air duct, a first adjusting structure is connected between the axial flow air duct and the rotational flow air outer duct, and the first adjusting structure is used for adjusting the axial flow air duct to change the air pressure at the air outlet of the axial flow air duct; a second adjusting structure is connected between the rotational flow air outer barrel and the rotational flow air inner barrel and used for adjusting the rotational flow air outer barrel and the axial flow air barrel so as to change the air pressure at the air outlet of the rotational flow air duct. According to the burner, pulverized coal and combustion-supporting air can be mixed as much as possible, and the burn-off rate of the pulverized coal is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of barium salt rotary kilns, and in particular relates to a pulverized coal burner for a barium salt rotary kiln. Background Art

[0002] The barium salt rotary kiln burner is a process equipment that delivers the fuel (such as pulverized coal) and combustion air required for the calcination of the barium salt rotary kiln into the kiln through their respective pipes in a certain proportion, mixes them fully and burns them, forms a suitable flame and temperature field, and provides heat for the calcination of the materials. The barium salt rotary kiln burner is a very small device in the entire barium salt rotary kiln system, but its role is crucial. It can be figuratively said to be the heart of the barium salt rotary kiln system. The performance of the barium salt rotary kiln burner directly affects the output, quality, heat consumption, exhaust gas emission indicators, process conditions, etc. of the barium salt rotary kiln system; the existing barium salt rotary kiln burners have the disadvantages of uneven mixing of pulverized coal and combustion air, and inconvenient use and adjustment. Summary of the invention

[0003] In order to solve all or part of the above problems, the present invention aims to provide a barium salt rotary kiln pulverized coal burner. The barium salt rotary kiln pulverized coal burner of the present invention can achieve the maximum mixing of pulverized coal and combustion-supporting air, thereby improving the burnout rate of pulverized coal.

[0004] According to one aspect of the present invention, a barium salt rotary kiln pulverized coal burner is provided, comprising an axial flow wind cylinder, a swirl wind outer cylinder, a swirl wind inner cylinder and a wind cylinder which are arranged in sequence from the outside to the inside, wherein a central air duct is formed in the wind cylinder, a coal-air channel is formed between the swirl wind inner cylinder and the wind cylinder, a swirl wind duct is formed between the swirl wind outer cylinder and the swirl wind inner cylinder, an axial flow air duct is formed between the axial flow wind cylinder and the swirl wind outer cylinder, support blocks are arranged in the central air duct, the coal-air channel, the swirl air duct and the axial flow air duct, and each of the support blocks is provided with a through hole whose axis is parallel to the axis of the wind cylinder The support block is used to make the axial flow wind cylinder, the cyclone wind outer cylinder, the cyclone wind inner cylinder and the wind cylinder coaxial; a first adjustment structure is connected between the axial flow wind cylinder and the cyclone wind outer cylinder, and the first adjustment structure is used to adjust the axial flow wind cylinder along the axial direction of the central air duct to change the wind pressure at the air outlet of the axial flow air duct; a second adjustment structure is connected between the cyclone wind outer cylinder and the cyclone wind inner cylinder, and the second adjustment structure is used to adjust the cyclone wind outer cylinder and the axial flow wind cylinder along the axial direction of the central air duct to change the wind pressure at the air outlet of the cyclone air duct.

[0005] Furthermore, the right end of the swirl wind outer cylinder extends to extend out of the axial flow air cylinder, and the right end of the swirl wind outer cylinder and the axial flow air cylinder are sealed by a sealing flange; the first adjustment device includes a first adjustment fixed seat, a first adjustment movable seat and a first adjustment screw, the first adjustment fixed seat is fixed outside the swirl wind outer cylinder, the first adjustment movable seat is fixed outside the axial flow air cylinder, a circular hole is opened on the first adjustment fixed seat, a threaded hole is opened on the first adjustment movable seat, one end of the first adjustment screw is threadedly connected to the threaded hole, and the other end of the first adjustment screw is limited in the circular hole.

[0006] Furthermore, the right end of the swirl wind inner cylinder extends to extend out of the swirl wind outer cylinder, and the right end of the swirl wind inner cylinder and the swirl wind outer cylinder are sealed by a sealing flange; the second adjusting device includes a second adjusting fixed seat, a second adjusting movable seat and a second adjusting screw, the second adjusting fixed seat is fixed outside the swirl wind inner cylinder, the second adjusting movable seat is fixed outside the swirl wind outer cylinder, a circular hole is opened on the second adjusting fixed seat, and a threaded hole is opened on the second adjusting movable seat, one end of the second adjusting screw is threadedly connected to the threaded hole, and the other end of the second adjusting screw is limited in the circular hole.

[0007] Furthermore, it also includes a combustion-supporting air inlet pipe, the left end of which passes through the axial flow air cylinder on the left side of the first adjustment structure and extends into the axial flow air duct, and the combustion-supporting air inlet pipe is provided with a bellows for compensating for the movement of the axial flow air cylinder.

[0008] Furthermore, a connecting pipe is arranged between the swirl wind outer cylinder and the combustion-supporting air inlet pipe, and the combustion-supporting air in the combustion-supporting air inlet pipe enters the swirl air duct in the swirl wind outer cylinder through the connecting pipe; the connection between the connecting pipe and the swirl wind outer cylinder is arranged between the first adjusting structure and the second adjusting structure, and the connection between the connecting pipe and the combustion-supporting air inlet pipe is arranged on the right side of the corrugated pipe.

[0009] Furthermore, it also includes a coal powder introduction pipe, which is connected to the swirl wind inner cylinder so that the coal powder can be introduced into the coal-wind channel of the swirl wind inner cylinder through the coal powder introduction pipe; the connection between the coal powder introduction pipe and the swirl wind inner cylinder is arranged on the right side of the second adjusting structure.

[0010] Furthermore, the right end of the wind duct extends out of the swirl wind inner cylinder, and the right end of the wind duct and the swirl wind inner cylinder are sealed by a sealing flange; the combustion-supporting air inlet pipe is connected to the wind duct through a connecting hose, and the combustion-supporting air in the combustion-supporting air inlet pipe enters the central air duct in the wind duct through the connecting pipe.

[0011] Furthermore, the axial flow wind tube is provided with a first conical hole whose inner diameter gradually increases from right to left near the flame; the left end of the swirl wind outer tube is fixedly connected with a first connecting ring, the outer diameter of the first connecting ring and the minimum inner diameter of the first conical hole match each other, and the first connecting ring is evenly distributed with a plurality of axial flow air outlets along its circumferential direction, and the plurality of axial flow air outlets are connected with the axial flow air duct, and the hole depth of each axial flow air outlet gradually decreases from right to left.

[0012] Furthermore, a second conical hole whose inner diameter gradually increases from right to left is provided on the inner wall of the first connecting ring near the flame, and a second connecting ring whose outer diameter gradually increases from right to left is provided on the swirl wind inner cylinder near the flame.

[0013] Furthermore, a lap ring is fixedly connected to the left end of the axial flow air duct, a smoke hood is limitedly arranged between the lap ring and the axial flow air duct, and the left end of the smoke hood extends leftward to the outside of the axial flow air duct; a threaded pipe is fixedly connected to the left end of the air duct, and the threaded pipe is threadedly connected to a coal air duct, a center stroke cover plate is arranged in the coal air duct, and a plurality of center stroke through holes are arranged on the center stroke cover plate; a lifting ear is fixedly connected to the outer side of the axial flow air duct.

[0014] It can be seen from the above technical solution that the barium salt rotary kiln pulverized coal burner provided by the present invention has the following beneficial effects:

[0015] The first adjustment structure and the second adjustment structure of the barium salt rotary kiln pulverized coal burner of the present invention can change the pressure of the combustion-supporting air accordingly, thereby adjusting the length and thickness of the flame accordingly to achieve the required flame shape and temperature zone length, and realize the most complete combustion of the pulverized coal; and the first adjustment structure and the second adjustment structure are simple in structure and easy to adjust; BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a barium salt rotary kiln pulverized coal burner according to an embodiment of the present invention;

[0017] Figure 2 A cross-sectional view of the head of a barium salt rotary kiln pulverized coal burner according to an embodiment of the present invention;

[0018] Figure 3 This is an end view of the head of a barium salt rotary kiln pulverized coal burner according to an embodiment of the present invention;

[0019] The reference numerals in the figure are: axial flow air duct 1, first adjustment structure 2, second adjustment structure 3, coal powder inlet pipe 4, combustion-supporting air inlet pipe 5, pressure gauge 6, butterfly valve 7, connecting hose 8, connecting pipe 9, swirl air outer cylinder 10, swirl air inner cylinder 11, coal air duct 12, support block 13, threaded pipe 14, air duct 15, lap ring 16, smoke hood 17, center stroke cover 18, first tapered hole 19, first connecting ring 20, axial flow air outlet 21, second tapered hole 22. DETAILED DESCRIPTION

[0020] In order to better understand the purpose, structure and function of the present invention, a barium salt rotary kiln pulverized coal burner of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, it shows a barium salt rotary kiln pulverized coal burner according to an embodiment of the present invention, comprising an axial flow wind cylinder 1, a swirl wind outer cylinder 10, a swirl wind inner cylinder 11 and a wind cylinder 15 which are arranged in sequence from the outside to the inside, wherein a central air duct is formed in the wind cylinder 15, a coal-air channel is formed between the swirl wind inner cylinder 11 and the wind cylinder 15, a swirl air duct is formed between the swirl wind outer cylinder 10 and the swirl wind inner cylinder 11, and an axial flow air duct is formed between the axial flow wind cylinder 1 and the swirl wind outer cylinder 10.

[0022] When the burner of this embodiment is in use, coal powder is introduced into the coal-air passage and ejected from the outlet end of the coal-air passage, and combustion-supporting air is ejected from the central air passage, the swirl air passage and the axial air passage to mix with the coal powder.

[0023] Support blocks 13 are provided in the central air duct, coal air channel, swirl air duct and axial flow air duct. Each support block 13 is provided with a through hole whose axis is parallel to the axis of the wind cylinder 15. The support block 13 is used to make the axial flow wind cylinder 1, the swirl wind outer cylinder 10, the swirl wind inner cylinder 11 and the wind cylinder 15 coaxial.

[0024] The support block 13 of this embodiment is used to ensure the coaxiality of each air duct, so as to realize the coaxial arrangement of the axial flow wind cylinder 1, the swirl wind outer cylinder 10, the swirl wind inner cylinder 11 and the wind cylinder 15; the support block 13 of this embodiment is provided with through holes along the flow direction, and these through holes are used for the combustion air or coal powder to pass through.

[0025] A first adjustment structure 2 is connected between the axial flow wind cylinder 1 and the swirl wind outer cylinder 10, and the first adjustment structure 2 is used to adjust the axial flow wind cylinder 1 along the axial direction of the central air duct to change the wind pressure at the air outlet of the axial flow air duct; a second adjustment structure 3 is connected between the swirl wind outer cylinder 10 and the swirl wind inner cylinder 11, and the second adjustment structure 3 is used to adjust the swirl wind outer cylinder 10 and the axial flow wind cylinder 1 along the axial direction of the central air duct to change the wind pressure at the air outlet of the swirl air duct.

[0026] The first adjusting structure 2 of the present embodiment is used to adjust the axial flow wind cylinder 1 along the axial direction of the central air duct. The movement of the axial flow wind cylinder 1 correspondingly changes the pressure of the combustion-supporting air ejected through the axial flow air duct; the second adjusting structure 3 is used to adjust the swirl wind outer cylinder 10 and the axial flow wind cylinder 1 along the axial direction of the central air duct. The simultaneous movement of the swirl wind outer cylinder 10 and the axial flow wind cylinder 1 will not affect the pressure of the combustion-supporting air ejected through the axial flow air duct, but will change the pressure of the combustion-supporting air ejected through the swirl air duct; the setting of the first adjusting structure 2 and the second adjusting structure 3 of the present embodiment can change the pressure of the combustion-supporting air accordingly, thereby correspondingly adjusting the length and thickness of the flame to achieve the required flame shape and temperature zone length, thereby realizing the most complete combustion of the coal powder.

[0027] Among them, the right end of the swirl wind outer cylinder 10 extends out of the axial flow wind cylinder 1, and the right end of the swirl wind outer cylinder 10 and the axial flow wind cylinder 1 are sealed by a sealing flange; the first adjustment device includes a first adjustment fixed seat, a first adjustment movable seat and a first adjustment screw, the first adjustment fixed seat is fixed outside the swirl wind outer cylinder 10, the first adjustment movable seat is fixed outside the axial flow wind cylinder 1, a round hole is opened on the first adjustment fixed seat, and a threaded hole is opened on the first adjustment movable seat. One end of the first adjustment screw is threadedly connected to the threaded hole, and the other end of the first adjustment screw is limited in the round hole.

[0028] Specifically, the right end of the swirl wind outer cylinder 10 extends to the outside of the axial flow wind cylinder 1, and the first adjustment device is connected between the part of the swirl wind outer cylinder 10 extending out of the axial flow wind cylinder 1 and the axial flow wind cylinder 1. The first adjustment device includes a first adjustment fixed seat, a first adjustment movable seat and a first adjustment screw. One end of the first adjustment screw is located in the threaded hole, and the other end of the first adjustment screw is located in the round hole. Both the round hole and the threaded hole are blind holes. When the first adjustment screw is rotated, since the other end of the first adjustment screw is limited by the round hole, the first adjustment movable seat moves accordingly, and the first adjustment movable seat moves accordingly, driving the axial flow wind cylinder 1 to move along its axial direction. The first adjustment device of this embodiment has the advantages of simple structure and convenient adjustment.

[0029] Among them, the right end of the swirl wind inner cylinder 11 extends to the outside of the swirl wind outer cylinder 10, and the right end of the swirl wind inner cylinder 11 and the swirl wind outer cylinder 10 are sealed by a sealing flange; the second adjusting device includes a second adjusting fixed seat, a second adjusting movable seat and a second adjusting screw, the second adjusting fixed seat is fixed on the outside of the swirl wind inner cylinder 11, the second adjusting movable seat is fixed on the outside of the swirl wind outer cylinder 10, a round hole is opened on the second adjusting fixed seat, and a threaded hole is opened on the second adjusting movable seat, one end of the second adjusting screw is threadedly connected to the threaded hole, and the other end of the second adjusting screw is limited in the round hole.

[0030] Specifically, the right end of the swirl wind inner cylinder 11 extends outside the swirl wind outer cylinder 10, and the second adjustment device has the same structure as the first adjustment device. When the second adjustment screw is rotated, the other end of the second adjustment screw is fixed to the circular hole limiter on the second adjustment fixed seat of the swirl wind inner cylinder 11, so the second adjustment movable seat moves accordingly, and the movement of the second adjustment movable seat correspondingly drives the swirl wind outer cylinder 10 and the axial flow wind cylinder 1 to move along the axial direction of the two. The second adjustment device of this embodiment has the advantages of simple structure and convenient adjustment.

[0031] In one embodiment, it also includes a combustion-supporting air inlet duct 5, the left end of which passes through the axial flow air cylinder 1 on the left side of the first adjustment structure 2 and extends into the axial flow air duct, and the combustion-supporting air inlet duct 5 is provided with a bellows for compensating for the movement of the axial flow air cylinder 1.

[0032] The combustion-supporting air inlet duct 5 of the present embodiment is used to pass the combustion-supporting air into the axial flow air duct of the axial flow air duct 1. The connection between the combustion-supporting air inlet duct 5 and the axial flow air duct 1 is on the left side of the first adjustment structure 2. Therefore, when the first adjustment structure 2 adjusts the axial flow air duct 1, the combustion-supporting air inlet duct 5 will move accordingly. In the present embodiment, a bellows is provided on the combustion-supporting air inlet duct 5, and the bellows is used to compensate for the movement of the axial flow air duct 1.

[0033] In one embodiment, a connecting pipe 9 is arranged between the swirl wind outer cylinder 10 and the combustion-supporting air inlet pipe 5, and the combustion-supporting air in the combustion-supporting air inlet pipe 5 enters the swirl air duct in the swirl wind outer cylinder 10 through the connecting pipe 9; the connection between the connecting pipe 9 and the swirl wind outer cylinder 10 is arranged between the first adjustment structure 2 and the second adjustment structure 3, and the connection between the connecting pipe 9 and the combustion-supporting air inlet pipe 5 is arranged on the right side of the bellows.

[0034] The connecting pipe 9 of this embodiment is used to pass the combustion-supporting air into the pipeline 5, and the combustion-supporting air enters the swirl air duct in the swirl air outer cylinder 10 through the connecting pipe 9. The connection between the connecting pipe 9 and the swirl air outer cylinder 10 is arranged between the first adjustment structure 2 and the second adjustment structure 3, and the connection between the connecting pipe 9 and the combustion-supporting air introduction pipeline 5 is arranged on the right side of the bellows.

[0035] In one embodiment, it also includes a coal powder introduction pipe 4, which is connected to the swirl wind inner cylinder 11, so that the coal powder is introduced into the coal-wind channel of the swirl wind inner cylinder 11 through the coal powder introduction pipe 4; the connection between the coal powder introduction pipe 4 and the swirl wind inner cylinder 11 is arranged on the right side of the second adjustment structure 3.

[0036] This embodiment is also provided with a coal powder introduction pipeline 4, through which the coal powder is introduced into the coal-air passage of the swirl wind inner cylinder 11.

[0037] In one embodiment, the right end of the wind tube 15 extends out of the swirl wind inner tube 11, and the right end of the wind tube 15 and the swirl wind inner tube 11 are sealed by a sealing flange; the combustion-supporting air inlet pipe 5 is connected to the wind tube 15 through a connecting hose 8, and the combustion-supporting air in the combustion-supporting air inlet pipe 5 enters the central air duct in the wind tube 15 through a connecting pipe 9.

[0038] The connecting hose 8 of this embodiment is used to deliver the combustion-supporting air into the pipeline 5 and into the air duct 15 through the connecting hose 8. The connecting hose 8 is also used to compensate for the movement caused by adjusting the first adjustment structure 2 and the second adjustment structure 3.

[0039] Among them, butterfly valves 7 are arranged on the combustion-supporting air inlet pipe 5 on the left side of the bellows, the connecting pipe 9 and the connecting hose 8. The butterfly valves 7 are used to adjust the air volume of the combustion-supporting air entering the swirl air duct, the swirl air duct and the central air duct. Again, pressure gauges 6 can be arranged on each pipeline as needed to monitor the pressure in the pipeline.

[0040] In one embodiment, if Figure 2 , Figure 3 As shown, the axial flow wind tube 1 is provided with a first tapered hole 19 whose inner diameter gradually increases from right to left near the flame; the left end of the swirl wind outer tube 10 is fixedly connected with a first connecting ring 20, the outer diameter of the first connecting ring 20 and the minimum inner diameter of the first tapered hole 19 match each other, and the first connecting ring 20 is evenly distributed with a plurality of axial flow air outlets 21 along its circumferential direction, and the plurality of axial flow air outlets 21 are connected with the axial flow air duct, and the hole depth of each axial flow air outlet 21 gradually decreases from right to left.

[0041] In the present embodiment, the axial flow wind tube 1 is provided with a first conical hole 19 near the flame, and the left end of the swirl wind outer tube 10 is fixedly connected with a first connecting ring 20, and the outer diameter of the first connecting ring 20 and the minimum inner diameter of the first conical hole 19 cooperate with each other, so the cooperation between the first connecting ring 20 and the first conical hole 19 will not affect the adjustment of the axial flow wind tube 1; the axial flow air outlet 21 is provided for the combustion-supporting air in the axial flow air duct to be ejected; the axial flow air outlet 21 of the present embodiment is also a conical hole, and the taper of the conical hole of the axial flow air outlet 21 is not equal to the taper of the first conical hole 19.

[0042] Once again, the end face outlet shape of the axial air outlet 21 is similar to a square, and the gap between the axial air outlet 21 and the axial air cylinder 1 forms an axial air hole, that is, the axial air hole is formed by the first tapered hole 19 on the inner wall of the axial air cylinder 1 and the axial air outlet 21 on the outer wall of the swirl wind outer cylinder 10. By adjusting the axial air cylinder 1 forward and backward, the area of ​​the axial air outlet 21 can be changed, and then the wind speed can be changed (that is, the wind speed can be changed under the condition of unchanged air volume, which is characterized by unchanged air volume and increased or decreased pressure); thirdly, after changing the area of ​​the axial air outlet 21, the air volume can be increased or decreased by adjusting the butterfly valve 7 so that the combustion-supporting air pressure of the axial air outlet 21 is constant, that is, the pressure is unchanged and the air volume is increased or decreased.

[0043] In one embodiment, a second tapered hole 22 with an inner diameter gradually increasing from right to left is provided on the inner wall of the first connecting ring 20 near the flame, and a second connecting ring is provided on the swirl wind inner cylinder 11 near the flame, and the outer diameter of the second connecting ring gradually increases from right to left.

[0044] The cooperation of the second conical hole 22 and the second connecting ring in this embodiment is used to adjust the outlet pressure of the swirl wind. Specifically, the outlet of the swirl air duct adopts a blunt body reflux structure to cause the hot air flow after combustion to reflux and form a stable recirculating flame. At the same time, by adjusting the outlet area, the swirl intensity can be adjusted to change the flame diameter.

[0045] It is explained again as follows: the fuel pulverized coal is transported into the burner through the coal-wind channel, and the combustion-supporting air enters the burner through three channels, namely the central air duct, the swirl air duct and the axial flow air duct. The air volume of the three air ducts can be adjusted by the butterfly valve 7. The fuel pulverized coal is ejected outward at a certain diffusion angle at the outlet formed by the swirl air inner cylinder 11 and the wind cylinder 15, and the swirl wind in the swirl air duct between the outer adjacent parts swirl wind outer cylinder 10 and the swirl wind inner cylinder 11 transmits a relatively high momentum and angular momentum, and spirals forward at a high speed and continues to diffuse radially. During the diffusion, the pulverized coal meets the axial flow wind beam ejected at a high speed from the axial flow air duct between the axial flow wind cylinder 1 and the swirl wind outer cylinder 10. The insertion of the axial flow wind beam further enhances the mixing of the pulverized coal fuel and the air (including the surrounding secondary air), wherein the outlet wind speeds of the axial flow wind and the swirl wind can be changed by the change of the cross-sectional area caused by the relative movement of the inner and outer layers, so that the axial flow wind and the swirl wind cooperate with each other to adjust the length and thickness of the flame to achieve the required flame shape and temperature zone length.

[0046] In one embodiment, a lap ring 16 is fixedly connected to the left end of the axial flow air duct 1 , a smoke collecting hood 17 is limitedly disposed between the lap ring 16 and the axial flow air duct 1 , and the left end of the smoke collecting hood 17 extends leftward to the outside of the axial flow air duct 1 .

[0047] The smoke collecting hood 17 of this embodiment is used to collect the flame and improve the combustion rate of the coal powder.

[0048] The left end of the air cylinder 15 is fixedly connected with a threaded pipe 14, the threaded pipe 14 is threadedly connected with the coal air cylinder 12, a middle air cover plate 18 is arranged in the coal air cylinder 12, and a plurality of middle air through holes are arranged on the middle air cover plate 18.

[0049] The arrangement of the coal wind tube 12 and the center wind through hole in this embodiment mainly serves to stabilize the flame and cool the head, while providing combustion-supporting air to the coal powder in the center portion. Furthermore, the combustion-supporting wind ejected from the center wind through holes on the center wind cover 18 can promote the full mixing and combustion of the coal powder fuel and the hot flue gas in the center portion, thereby making the flame more stable and the combustion more complete.

[0050] A lifting lug is fixedly connected to the outer side of the axial flow air cylinder 1. The setting of the lifting lug is used to facilitate the lifting of the burner.

[0051] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0052] In addition, the terms "one", "two", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0053] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A barium salt rotary kiln pulverized coal burner, characterized in that: The invention comprises an axial flow wind cylinder, a cyclone wind outer cylinder, a cyclone wind inner cylinder and a wind cylinder which are arranged in sequence from the outside to the inside, wherein a central wind duct is formed in the wind cylinder, a coal wind channel is formed between the cyclone wind inner cylinder and the wind cylinder, a cyclone wind duct is formed between the cyclone wind outer cylinder and the cyclone wind inner cylinder, an axial flow wind duct is formed between the axial flow wind cylinder and the cyclone wind outer cylinder, support blocks are arranged in the central wind duct, the coal wind channel, the cyclone wind duct and the axial flow wind duct, each of the support blocks is provided with a through hole whose axis is parallel to the axis of the wind cylinder, and the support blocks are used to make the axial flow wind The cylinder, the swirl wind outer cylinder, the swirl wind inner cylinder and the wind cylinder are coaxial; a first adjusting structure is connected between the axial flow wind cylinder and the swirl wind outer cylinder, and the first adjusting structure is used to adjust the axial flow wind cylinder along the axial direction of the central air duct to change the wind pressure at the air outlet of the axial flow air duct; a second adjusting structure is connected between the swirl wind outer cylinder and the swirl wind inner cylinder, and the second adjusting structure is used to adjust the swirl wind outer cylinder and the axial flow wind cylinder along the axial direction of the central air duct to change the wind pressure at the air outlet of the swirl air duct.

2. The barium salt rotary kiln pulverized coal burner according to claim 1, characterized in that: The right end of the swirl wind outer cylinder extends to the outside of the axial flow wind cylinder, and the right end of the swirl wind outer cylinder and the axial flow wind cylinder are sealed by a sealing flange; the first adjustment device includes a first adjustment fixed seat, a first adjustment movable seat and a first adjustment screw, the first adjustment fixed seat is fixed outside the swirl wind outer cylinder, the first adjustment movable seat is fixed outside the axial flow wind cylinder, a circular hole is opened on the first adjustment fixed seat, a threaded hole is opened on the first adjustment movable seat, one end of the first adjustment screw is threadedly connected to the threaded hole, and the other end of the first adjustment screw is limited in the circular hole.

3. The barium salt rotary kiln pulverized coal burner according to claim 1, characterized in that: The right end of the swirl wind inner cylinder extends to extend out of the swirl wind outer cylinder, and the right end of the swirl wind inner cylinder and the swirl wind outer cylinder are sealed by a sealing flange; the second adjusting device includes a second adjusting fixed seat, a second adjusting movable seat and a second adjusting screw, the second adjusting fixed seat is fixed to the outside of the swirl wind inner cylinder, the second adjusting movable seat is fixed to the outside of the swirl wind outer cylinder, a circular hole is opened on the second adjusting fixed seat, and a threaded hole is opened on the second adjusting movable seat, one end of the second adjusting screw is threadedly connected to the threaded hole, and the other end of the second adjusting screw is limited in the circular hole.

4. The barium salt rotary kiln pulverized coal burner according to claim 1, characterized in that: It also includes a combustion-supporting air inlet pipe, the left end of which passes through the axial flow air cylinder on the left side of the first adjustment structure and extends into the axial flow air duct. The combustion-supporting air inlet pipe is provided with a bellows for compensating for the movement of the axial flow air cylinder.

5. The barium salt rotary kiln pulverized coal burner according to claim 4, characterized in that: A connecting pipe is arranged between the swirl wind outer cylinder and the combustion-supporting air inlet pipe, and the combustion-supporting air in the combustion-supporting air inlet pipe enters the swirl air duct in the swirl wind outer cylinder through the connecting pipe; the connection between the connecting pipe and the swirl wind outer cylinder is arranged between the first adjusting structure and the second adjusting structure, and the connection between the connecting pipe and the combustion-supporting air inlet pipe is arranged on the right side of the bellows.

6. The barium salt rotary kiln pulverized coal burner according to claim 4, characterized in that: It also includes a coal powder introduction pipe, which is connected to the swirl wind inner cylinder so that coal powder can be introduced into the coal-wind channel of the swirl wind inner cylinder through the coal powder introduction pipe; the connection between the coal powder introduction pipe and the swirl wind inner cylinder is arranged on the right side of the second adjusting structure.

7. The barium salt rotary kiln pulverized coal burner according to claim 4, characterized in that: The right end of the wind duct extends out of the swirl air inner cylinder, and the right end of the wind duct and the swirl air inner cylinder are sealed by a sealing flange; the combustion-supporting air inlet pipe is connected to the wind duct through a connecting hose, and the combustion-supporting air in the combustion-supporting air inlet pipe enters the central air duct in the wind duct through the connecting pipe.

8. The barium salt rotary kiln pulverized coal burner according to claim 1, characterized in that: The axial flow wind tube is provided with a first tapered hole whose inner diameter gradually increases from right to left near the flame; the left end of the swirl wind outer tube is fixedly connected with a first connecting ring, the outer diameter of the first connecting ring and the minimum inner diameter of the first tapered hole match each other, and the first connecting ring is evenly distributed with a plurality of axial flow air outlets along its circumferential direction, and the plurality of axial flow air outlets are connected with the axial flow air duct, and the hole depth of each axial flow air outlet gradually decreases from right to left.

9. The barium salt rotary kiln pulverized coal burner according to claim 8, characterized in that: A second tapered hole whose inner diameter gradually increases from right to left is provided on the inner wall of the first connecting ring near the flame, and a second connecting ring whose outer diameter gradually increases from right to left is provided on the swirl wind inner cylinder near the flame.

10. The barium salt rotary kiln pulverized coal burner according to claim 1, characterized in that: The left end of the axial flow air duct is fixedly connected with a lap ring, and a smoke collection hood is limitedly arranged between the lap ring and the axial flow air duct, and the left end of the smoke collection hood extends leftward to the outside of the axial flow air duct; the left end of the air duct is fixedly connected with a threaded pipe, and the threaded pipe is threadedly connected with a coal air duct, a center stroke cover plate is arranged in the coal air duct, and a plurality of center stroke through holes are arranged on the center stroke cover plate; the outer side of the axial flow air duct is fixedly connected with a lifting ear.

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