A wall-fired tangentially fired combustor for low quality coal and method of use

Abstract

The invention belongs to the field of boiler burner devices, and discloses a wall type tangential circle burner suitable for low-quality coal and a use method, which comprises a boiler body, a bottom plate is welded on the side of the boiler body, a hydraulic device is installed on the top of the bottom plate, a hydraulic rod is installed at one end of the hydraulic device, a burner body is arranged on the side of the boiler body, and a first fixing block is welded on the bottom of the burner body. The wall type tangential circle burner suitable for low-quality coal and the control method thereof have the advantages that the bottom plate is welded on the side of the boiler body, the hydraulic device is installed on the top of the bottom plate, the hydraulic rod is installed at one end of the hydraulic device, the burner body is arranged on the side of the boiler body, and the first fixing block is welded on the bottom of the burner body. The hydraulic rod can be controlled to extend or retract through the hydraulic device, the burner body can be moved under the action of the second external thread rod and the first shaft rod, the flame angle of the burner body can be changed, and the burner body can be adapted to the combustion of low-quality coal during use.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of boiler burner device, and particularly relates to a wall type tangential circular burner suitable for low-quality coal and a use method. BACKGROUND

[0002] A boiler is an important energy conversion equipment and is widely used in industrial production and daily life. The boiler comprises a boiler and a furnace, and water or other fluids are heated to a certain parameter by using heat energy released by fuel combustion or other heat energy. At this time, a wall type tangential circular burner needs to be used to heat the boiler.

[0003] The wall type tangential circular burner and the control method thereof on the market have the following problems in application:

[0004] 1. In actual use, the angle of the traditional wall type tangential circular burner and the control method thereof cannot be changed when the burner is used. At this time, the position of the flame sprayed by the burner cannot be changed. When the device uses low-quality coal, the intensity of the flame of the burner will be different, and the position of the flame will change, thereby reducing the efficiency.

[0005] 2. In the use process of most wall type tangential circular burners and control methods, the air inlet of the device cannot be changed in the use process of the burner, and the air inlet pipe space is large, thereby causing the air flow rate inside the device to be slow. When the device uses low-quality coal, the combustion effect of the low-quality coal will be affected due to the small amount of air inside, and the utilization rate is small when used.

[0006] 3. In the use process of most wall type tangential circular burners and control methods, the burner itself of the device is completely exposed to the outside when the device is used. When the device is used in the process, the burner may be impacted, thereby affecting the operation of the burner, and the protection is poor when used. SUMMARY

[0007] The present application aims to overcome the low efficiency caused by the change of the flame position, and provides a wall type tangential circular burner suitable for low-quality coal and a use method.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0009] In a first aspect, the present application provides a wall type tangential burner suitable for low-quality coal, comprising a boiler body, a bottom plate welded to the side of the boiler body, a hydraulic device mounted on the top of the bottom plate, a hydraulic rod mounted on the top of the hydraulic device, a burner body provided on the side of the boiler body, two first fixing blocks welded to the bottom of the burner body, the two first fixing blocks being symmetrically distributed, the hydraulic rod being located between the two first fixing blocks, a second external threaded rod provided in the first fixing block, the second external threaded rod penetrating the hydraulic rod, a first nut mounted on the surface of the second external threaded rod, one end of the first nut being attached to the side of the first fixing block, a side plate welded to the side of the burner body, a first fixing strip mounted on the side of the side plate, the first fixing strip being connected to a second fixing strip through a first shaft, two fixing seats welded to the surface of the first shaft, the two fixing seats being symmetrically distributed and respectively attached to the surfaces of the first fixing strip and the second fixing strip, an installation plate fixedly connected to one end of the second fixing strip, and the installation plate being mounted on the surface of the boiler body.

[0010] Further improvements of the present application are that a secondary pipeline is welded to the surface of the boiler body, one end of the secondary pipeline is fixedly connected to a second connecting plate, the second connecting plate is connected to a first connecting plate through bolts, one end of a wind pipe is welded to the surface of the first connecting plate, and the other end of the wind pipe is welded to a main pipeline.

[0011] Further improvements of the present application are that an internal threaded seat is fixedly connected to the side of the bottom plate, a fixed rod is sleeved in the internal threaded seat, external threads are formed on the surface of the fixed rod, a bearing is welded to the surface of the fixed rod, two protective plates are welded to the surface of the bearing, the two protective plates are symmetrically distributed, the burner body is located between the two protective plates, a stop rod is sleeved in the protective plate, and ball heads are welded to both ends of the stop rod.

[0012] Further improvements of the present application are that two second fixing blocks are welded to the side of the boiler body, the two second fixing blocks are symmetrically distributed, an extension pipe is sleeved in the boiler body, a second shaft is welded to the surface of the extension pipe, the second shaft penetrates the second fixing block, the extension pipe is connected to a first flange plate through a second flange plate, and the burner body is welded to the inside of the first flange plate.

[0013] Further improvements of the present application are that a fixed ring is welded to the top of the bottom plate, a sliding groove is formed on the surface of the fixed ring, a first external threaded rod is welded to the surface of the hydraulic device, the first external threaded rod is located in the sliding groove, an extrusion turntable is mounted on the surface of the first external threaded rod, and one end of the extrusion turntable is attached to the surface of the fixed ring.

[0014] Further improvements of the present application are that a third external threaded rod is welded to the side of the side plate, the third external threaded rod penetrates a fixed plate, the fixed plate is welded to the first fixing strip, a second nut is sleeved on the surface of the third external threaded rod, one end of the second nut is attached to the surface of the fixed plate, a positioning rod is welded to the side of the side plate, a positioning hole is formed on the surface of the fixed plate, and the positioning rod penetrates the positioning hole.

[0015] The further improvement of the present application is that the fourth external threaded rod is welded on the surface of the boiler body, penetrates the mounting plate, and the third nut is sleeved on the surface of the fourth external threaded rod, and one end of the third nut is attached to the surface of the mounting plate.

[0016] The further improvement of the present application is that the limiting frame is welded on the surface of the boiler body, the mounting plate is sleeved in the limiting frame, and the knob is welded on the surface of the fixed rod.

[0017] In the second aspect, the present application provides a use method of the wall type tangential burner suitable for low-quality coal, which comprises the following steps:

[0018] When the flame position changes during the use of low-quality coal, the hydraulic rod is controlled to be extended or retracted through the hydraulic device, the burner body is moved under the action of the second external threaded rod and the first shaft rod, and the flame angle of the burner body is changed.

[0019] The further improvement of the present application is that during use, air enters the air duct through the main pipeline, and due to the effect of the gradually inward shrinking of the air duct, the air is compressed, and the air flow rate entering the inside of the boiler body is increased.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The present application has the following beneficial effects:

[0022] Further, the present application is characterized in that the second connecting plate is fixedly connected to the auxiliary pipeline at one end, and the first connecting plate is connected to the second connecting plate through bolts, and the air duct is welded on the surface of the first connecting plate, and the main pipeline is welded on the other end of the air duct, and when the device is in use, the air enters the air duct through the main pipeline, and the air is compressed due to the effect of the gradually shrinking air duct, and in the case of the same amount of air, the smaller the flow space, the faster the air flow, and then the air enters the boiler body through the auxiliary pipeline, and the air flow rate into the boiler body is increased, and the utilization rate of the low-quality coal is improved.

[0023] Further, the present application is characterized in that the second connecting plate is fixedly connected to the auxiliary pipeline at one end, and the first connecting plate is connected to the second connecting plate through bolts, and the air duct is welded on the surface of the first connecting plate, and the main pipeline is welded on the other end of the air duct, and when the device is in use, the air enters the air duct through the main pipeline, and the air is compressed due to the effect of the gradually shrinking air duct, and in the case of the same amount of air, the smaller the flow space, the faster the air flow, and then the air enters the boiler body through the auxiliary pipeline, and the air flow rate into the boiler body is increased, and the utilization rate of the low-quality coal is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an overall structure diagram of the present application;

[0025] Figure 2 It is a structure diagram of the boiler body of the present application;

[0026] Figure 3 It is a structure diagram of the main pipeline of the present application;

[0027] Figure 4 It is a structure diagram of the protection plate of the present application;

[0028] Figure 5 It is a structure diagram of the side plate of the present application;

[0029] Figure 6 It is a structure diagram of the first fixed strip of the present application;

[0030] Figure 7 It is a structure diagram of the hydraulic device of the present application;

[0031] Figure 8 It is a structure diagram of the Figure 2 It is an enlarged structure diagram of part A of the present application;

[0032] Figure 9 For the invention Figure 3 Enlarged view of part B;

[0033] Figure 10 For the invention Figure 3 Enlarged view of part C.

[0034] The label in the figure: 1, boiler body; 2, burner body; 3, main pipe; 4, bottom plate; 5, fixed ring; 6, chute; 7, hydraulic device; 8, first external threaded rod; 9, extrusion turntable; 10, first fixed block; 11, hydraulic rod; 12, first nut; 13, second external threaded rod; 14, side plate; 15, third external threaded rod; 16, fixed plate; 17, second nut; 18, positioning rod; 19, positioning hole; 20, first fixed strip; 21, second fixed strip; 22, first shaft rod; 23, fixed seat; 24, mounting plate; 25, third nut; 26, limiting frame; 27, fourth external threaded rod; 28, first flange plate; 29, extension pipe; 30, second flange plate; 31, second fixed block; 32, second shaft rod; 33, auxiliary pipe; 34, wind pipe; 35, first connecting plate; 36, second connecting plate; 37, internal threaded seat; 38, guard plate; 39, bearing; 40, fixed rod; 41, knob; 42, stop lever; 43, ball head. DETAILED DESCRIPTION

[0035] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0036] In the description of the present invention, it needs to be understood that the terms "length", "vertical", "horizontal", "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can refer to the same reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not in itself indicate a relationship between the various embodiments and / or arrangements being discussed.

[0040] Reference Figures 1 to 10 A wall type tangential burner suitable for low-quality coal, comprising a boiler body 1, a bottom plate 4 is welded on the side of the boiler body 1, a hydraulic device 7 is installed on the top of the bottom plate 4, a hydraulic rod 11 is installed on the top of the hydraulic device 7, a burner body 2 is arranged on the side of the boiler body 1, two first fixed blocks 10 are welded on the bottom of the burner body 2, the two first fixed blocks 10 are symmetrically distributed, the hydraulic rod 11 is located between the two first fixed blocks 10, a second external threaded rod 13 is arranged in the first fixed block 10, the second external threaded rod 13 penetrates the hydraulic rod 11, a first nut 12 is installed on the surface of the second external threaded rod 13, one end of the first nut 12 is attached to the side of the first fixed block 10, a side plate 14 is welded on the side of the burner body 2, a first fixed strip 20 is installed on the side of the side plate 14, the first fixed strip 20 is connected to a second fixed strip 21 through a first shaft 22, two fixed seats 23 are welded on the surface of the first shaft 22, the two fixed seats 23 are symmetrically distributed, the two fixed seats 23 are respectively attached to the surface of the first fixed strip 20 and the second fixed strip 21, an installation plate 24 is fixedly connected to one end of the second fixed strip 21, and the installation plate 24 is installed on the surface of the boiler body 1.

[0041] A secondary pipeline 33 is welded on the surface of the boiler body 1, one end of the secondary pipeline 33 is fixedly connected to a second connecting plate 36, the second connecting plate 36 is connected to a first connecting plate 35 through bolts, one end of a wind collecting pipe 34 is welded on the surface of the first connecting plate 35, and the other end of the wind collecting pipe 34 is welded on the main pipeline 3.

[0042] The side surface of the bottom plate 4 is fixedly connected with an internally threaded seat 37, the internally threaded seat 37 is internally sleeved with a fixed rod 40, the surface of the fixed rod 40 is provided with external threads, the surface of the fixed rod 40 is welded with a bearing 39, the surface of the bearing 39 is welded with two protective plates 38 which are symmetrically distributed, the burner body 2 is located between the two protective plates 38, the protective plate 38 is internally sleeved with a stop rod 42, and the two ends of the stop rod 42 are welded with ball heads 43.

[0043] The side surface of the boiler body 1 is welded with two second fixed blocks 31 which are symmetrically distributed, the boiler body 1 is internally sleeved with an extension pipe 29, the surface of the extension pipe 29 is welded with a second shaft rod 32, the second shaft rod 32 penetrates through the second fixed block 31, the extension pipe 29 is connected with the first flange plate 28 through the second flange plate 30, and the first flange plate is internally welded with the burner body 2.

[0044] The top of the bottom plate 4 is welded with a fixed ring 5, the surface of the fixed ring 5 is provided with a sliding groove 6, the surface of a hydraulic device 7 is welded with a first externally threaded rod 8, the first externally threaded rod 8 is located in the sliding groove 6, the surface of the first externally threaded rod 8 is mounted with an extrusion turntable 9, and one end of the extrusion turntable 9 is attached to the surface of the fixed ring 5.

[0045] The side surface of the side plate 14 is welded with a third externally threaded rod 15, the third externally threaded rod 15 penetrates through a fixed plate 16, the surface of the fixed plate 16 is welded with a first fixed strip 20, the surface of the third externally threaded rod 15 is sleeved with a second nut 17, one end of the second nut 17 is attached to the surface of the fixed plate 16, the side surface of the side plate 14 is welded with a positioning rod 18, the surface of the fixed plate 16 is provided with a positioning hole 19, and the positioning rod 18 penetrates through the positioning hole 19.

[0046] The surface of the boiler body 1 is welded with a fourth externally threaded rod 27, the fourth externally threaded rod 27 penetrates through a mounting plate 24, the surface of the fourth externally threaded rod 27 is sleeved with a third nut 25, and one end of the third nut 25 is attached to the surface of the mounting plate 24.

[0047] The surface of the boiler body 1 is welded with a limiting frame 26, the limiting frame 26 is internally sleeved with the mounting plate 24, and the surface of the fixed rod 40 is welded with a knob 41.

[0048] Embodiment 1:

[0049] The embodiment comprises a boiler body 1, a side welding bottom plate 4, a hydraulic device 7 installed on the top of the bottom plate 4, a hydraulic rod 11 installed on one end of the hydraulic device 7, a burner body 2 arranged on the side of the boiler body 1, a first fixing block 10 welded on the bottom of the burner body 2, the first fixing block 10 arranged in a symmetrical distribution, the hydraulic rod 11 located between the first fixing block 10, a second external threaded rod 13 installed inside the first fixing block 10, the second external threaded rod 13 penetrating through the hydraulic rod 11, a first nut 12 installed on the surface of the second external threaded rod 13, one end of the first nut 12 adhered to the side of the first fixing block 10, a side plate 14 welded on the side of the burner body 2, a first fixing strip 20 installed on the side of the side plate 14, the first fixing strip 20 connected with a second fixing strip 21 through a first shaft rod 22, a fixing seat 23 welded on the surface of the first shaft rod 22, the fixing seat 23 arranged in a symmetrical distribution, the fixing seat 23 respectively adhered to the surface of the first fixing strip 20 and the second fixing strip 21, and the second fixing strip 21 fixedly connected with a mounting plate 24 on one end, the mounting plate 24 installed on the surface of the boiler body 1.

[0050] When the device is used for burning low-quality coal, the flame position of the burner changes, the hydraulic rod 11 can be controlled to stretch and retract through the hydraulic device 7, the burner body 2 can be moved under the action of the second external threaded rod 13 and the first shaft rod 22, and the flame angle of the burner body 2 is changed, so that the device can be adapted to the burning of low-quality coal.

[0051] The hydraulic rod 11 can be controlled to stretch and retract through the hydraulic device 7, the second external threaded rod 13 provides a rotation center for the burner body 2 when the hydraulic rod 11 stretches and retracts, the first shaft rod 22 becomes a second rotation center for the burner body 2 when the burner body 2 rotates, the burner body 2 can be moved under the action of the second external threaded rod 13 and the first shaft rod 22, the flame angle of the burner body 2 is changed, and the device can be adapted to the burning of low-quality coal.

[0052] Embodiment 2

[0053] The embodiment is characterized in that a secondary pipeline 33 is welded on the surface of the boiler body 1, one end of the secondary pipeline 33 is fixedly connected with a second connecting plate 36, the second connecting plate 36 is connected with a first connecting plate 35 through bolts, a wind duct 34 is welded on the surface of the first connecting plate 35, and the other end of the wind duct 34 is welded with the main pipeline 3.

[0054] When the device is used, air enters the wind duct 34 through the main pipeline 3, the air is compressed due to the effect that the wind duct 34 gradually shrinks inward, the air flow rate entering the inside of the boiler body 1 can be increased at this time, and low-quality coal can be fully burned when the device is used.

[0055] Air will enter the beam air pipe 34 through the main pipe 3, due to the effect of the beam air pipe 34 gradually shrinking inward, the air can be compressed, in the case of the same amount of air, the smaller the flow space, the faster the air flow rate, which in turn enters the boiler body 1 through the secondary pipe 33, at this time the air flow rate entering the boiler body 1 can be increased, which in use makes the low-quality coal fully combustible, which in use improves the utilization rate.

[0056] Embodiment 3:

[0057] In this embodiment, the inner threaded seat 37 is fixedly connected on the side of the base plate 4, the fixed rod 40 is sleeved in the inner threaded seat 37, the outer thread is formed on the surface of the fixed rod 40, the bearing 39 is welded on the surface of the fixed rod 40, the protective plate 38 is welded on the surface of the bearing 39, the protective plate 38 is symmetrically distributed, the burner body 2 is located between the protective plates 38, the stop rod 42 is sleeved in the protective plate 38, and the ball head 43 is welded on both ends of the stop rod 42.

[0058] In the use of the device, the protective plate 38 and the stop rod 42 can protect the burner body 2, and when the burner body 2 is used, it will not be collided by the outside world, and the protection is strong in use.

[0059] The bearing 39 rotates the fixed rod 40, and the outer thread on the surface of the fixed rod 40 can be installed in the inner threaded seat 37, at this time the protective plate 38 can be installed on both sides of the burner body 2, and the stop rod 42 will be located at the top of the burner, the protective plate 38 and the stop rod 42 can protect the burner body 2, when the burner body 2 is used, it will not be collided by the outside world, and the protection is strong in use.

[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them, although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by the same, without departing from the spirit and scope of the present application. Any modification or equivalent replacement, which should be covered by the protection scope of the claims of the present application.

Claims

1. A wall-type tangential circle burner suitable for low-quality coal, characterized in that: The invention comprises a boiler body (1), a bottom plate (4) is welded to the side of the boiler body (1), a hydraulic device (7) is installed on the top of the bottom plate (4), a hydraulic rod (11) is installed on the top of the hydraulic device (7), a burner body (2) is provided on the side of the boiler body (1), two first fixing blocks (10) are welded to the bottom of the burner body (2), the two first fixing blocks (10) are symmetrically distributed, the hydraulic rod (11) is located between the two first fixing blocks (10), a second externally threaded rod (13) is provided inside the first fixing block (10), the second externally threaded rod (13) passes through the hydraulic rod (11), and a first nut (12) is installed on the surface of the second externally threaded rod (13) ), one end of the first nut (12) is attached to the side of the first fixing block (10), a side plate (14) is welded to the side of the burner body (2), a first fixing bar (20) is installed on the side of the side plate (14), the first fixing bar (20) is connected to the second fixing bar (21) through the first shaft (22), two fixing seats (23) are welded on the surface of the first shaft (22), the two fixing seats (23) are symmetrically distributed, and the two fixing seats (23) are attached to the surfaces of the first fixing bar (20) and the second fixing bar (21), respectively, one end of the second fixing bar (21) is fixedly connected to the mounting plate (24), and the back of the mounting plate (24) is mounted on the surface of the boiler body (1).

2. A wall-type tangential circle burner suitable for low-quality coal according to claim 1, characterized in that: A secondary pipe (33) is welded to the surface of the boiler body (1), one end of the secondary pipe (33) is fixedly connected to the second connecting plate (36), the second connecting plate (36) is connected to the first connecting plate (35) by bolts, one end of the air bundle pipe (34) is welded to the surface of the first connecting plate (35), and the other end of the air bundle pipe (34) is welded to the main pipe (3).

3. The wall-type tangential circle burner suitable for low-quality coal according to claim 1, characterized in that: An internal thread seat (37) is fixedly connected to the side of the bottom plate (4), and a fixed rod (40) is sleeved inside the internal thread seat (37). An external thread is provided on the surface of the fixed rod (40). A bearing (39) is welded to the surface of the fixed rod (40). Two protective plates (38) are welded to the surface of the bearing (39). The two protective plates (38) are symmetrically distributed. The burner body (2) is located between the two protective plates (38). A gear rod (42) is sleeved inside the protective plate (38), and ball heads (43) are welded to both ends of the gear rod (42).

4. The wall-type tangential circle burner suitable for low-quality coal according to claim 1, characterized in that: Two second fixing blocks (31) are welded to the side of the boiler body (1), and the two second fixing blocks (31) are symmetrically distributed. The boiler body (1) is internally sleeved with an extension pipe (29), and a second shaft (32) is welded to the surface of the extension pipe (29). The second shaft (32) passes through the second fixing block (31). The extension pipe (29) is connected to the first flange (28) through the second flange (30), and the burner body (2) is welded inside the first flange.

5. The wall-type tangential circle burner suitable for low-quality coal according to claim 1, characterized in that: A fixing ring (5) is welded to the top of the bottom plate (4), a sliding groove (6) is provided on the surface of the fixing ring (5), a first externally threaded rod (8) is welded to the surface of the hydraulic device (7), the first externally threaded rod (8) is located inside the sliding groove (6), an extrusion turntable (9) is installed on the surface of the first externally threaded rod (8), and one end of the extrusion turntable (9) is in contact with the surface of the fixing ring (5).

6. The wall-type tangential circle burner suitable for low-quality coal according to claim 1, characterized in that: A third externally threaded rod (15) is welded to the side of the side plate (14), the third externally threaded rod (15) passes through the fixed plate (16), a first fixing strip (20) is welded to the surface of the fixed plate (16), a second nut (17) is sleeved on the surface of the third externally threaded rod (15), one end of the second nut (17) is attached to the surface of the fixed plate (16), a positioning rod (18) is welded to the side of the side plate (14), a positioning hole (19) is provided on the surface of the fixed plate (16), and the positioning rod (18) passes through the positioning hole (19).

7. The wall-type tangential circle burner suitable for low-quality coal according to claim 1, characterized in that: A fourth externally threaded rod (27) is welded to the surface of the boiler body (1), the fourth externally threaded rod (27) passes through the mounting plate (24), the surface of the fourth externally threaded rod (27) is sleeved with a third nut (25), and one end of the third nut (25) is attached to the surface of the mounting plate (24).

8. The wall-type tangential circle burner suitable for low-quality coal according to claim 1, characterized in that: The boiler body (1) is welded with a limit frame (26) on its surface, the limit frame (26) is internally sleeved with a mounting plate (24), and the fixing rod (40) is welded with a knob (41) on its surface.

9. A method for using a wall-type tangential circle burner suitable for low-quality coal, characterized in that: A wall-type tangential circle burner suitable for low-quality coal according to any one of claims 1 to 8 comprises the following steps: When the flame position changes when using inferior coal, the hydraulic rod (11) is controlled to extend and retract by the hydraulic device (7), and the burner body (2) is moved under the action of the second external threaded rod (13) and the first shaft rod (22), thereby changing the flame angle of the burner body (2).

10. The method for using a wall-type tangential circle burner suitable for low-quality coal according to claim 9, characterized in that: During use, air enters the air bundle pipe (34) through the main pipe (3). As the air bundle pipe (34) gradually contracts inward, the air is compressed, thereby increasing the flow rate of the air entering the boiler body (1).

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