Pulverized coal burner with adjustable feeding proportion

Abstract

The pulverized coal burner comprises a bottom plate and supports, the four supports are fixed to one side of the bottom plate, a material pouring box is installed at the top ends of the supports, a material pushing device is arranged on one side of the material pouring box, the bottom of the material pouring box is connected with a proportion adjusting device, a fixing plate is installed in the middle of the supports, and the fixing plate is connected with the supports. A bearing is arranged in the center of the fixing plate, a proportion adjusting device penetrates through the bearing and is fixed to an inner ring of the bearing, a primary air box is placed under the proportion adjusting device, and the primary air box is communicated with a combustor placed on the other side of the bottom plate through a material conveying pipe. The blanking amount and the blanking proportion of pulverized coal and auxiliary materials in the leakage opening are controlled by adjusting the covering area of the semicircular plate on the pulverized coal and auxiliary material blanking opening, and the multiple sets of connecting rods are arranged to drive the material pushing rods and the material pushing plates to do vertical reciprocating motion, so that the two sets of material pushing plates can continuously press and push the pulverized coal and the auxiliary materials in the box body downwards. And the discharging process is smoother.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverized coal burners, in particular to a pulverized coal burner with adjustable feed ratio. Background Art

[0002] In order to further accelerate the pace of energy conservation and environmental protection, in current industrial production activities, when coal powder is burned in boilers, people often explore and try to add a certain amount of biofuel to coal powder, which can not only save fuel resources, but also make full use of organic waste generated in agricultural production. However, there are not many studies and results on this trend. It is very important to master the ratio of coal powder and different combustion auxiliary materials. Therefore, in actual research and production activities, it is often necessary to constantly adjust the ratio of coal powder to auxiliary materials.

[0003] Announcement number: CN116592345A, published Chinese patent, specifically a coal powder burner with adjustable air supply volume, including a burner body, the outer surface of the burner body is fixedly connected with a primary air duct, and the adjustment mechanism includes an air connection pipe, and the air connection pipe is arranged at an end of the water-cooled wall away from the burner body. However, the device can only adjust the air supply volume, but cannot adjust the proportion of fuel, and cannot meet the above-mentioned practical requirements. Utility Model Content

[0004] The utility model aims to provide a pulverized coal burner with adjustable feed ratio, which has the advantages of adjustable fuel feed ratio and smooth material feeding, and solves the problems in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pulverized coal burner with adjustable feed ratio comprises a base plate and a bracket, four brackets are fixed on one side of the base plate, a dump box is installed on the top of the bracket, a pushing device is provided on one side of the dump box, a ratio adjusting device is connected to the bottom of the dump box, a fixed plate is installed in the middle of the bracket, a bearing is provided at the center position of the fixed plate, the ratio adjusting device passes through the bearing and is fixed to the inner ring of the bearing, a primary bellows is placed directly below the ratio adjusting device, and the primary bellows is connected to the burner placed on the other side of the base plate through a feed pipe.

[0007] Preferably, the material dumping box is funnel-shaped as a whole, with a leakage opening at the bottom of the material dumping box and a partition on the inner wall of the material dumping box. The internal space of the material dumping box is separated into two halves by the partition, and half of the space close to the pushing device is the coal powder feeding area, and the other half of the space is the auxiliary material feeding area.

[0008] Preferably, the pushing device includes a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a pushing rod, a pushing plate, a fixing frame, a pushing motor and a supporting frame. The bottom end of the pushing rod is fixedly connected to the pushing plate. The pushing rod and the pushing plate are an integrated structure. There are two groups of pushing rods and pushing plates and they are respectively located on both sides of the partition.

[0009] Preferably, the fixing frame and the supporting frame are both welded to the outer wall of one side of the dumping box, a pushing motor is installed on the outer side of the top end of the supporting frame, a first connecting rod is fixed on the output shaft of the pushing motor, the first connecting rod is connected to the second connecting rod pin shaft, the middle part of the third connecting rod is hinged to the supporting frame, the short rod of the third connecting rod is connected to the second connecting rod pin shaft, and the long rod of the third connecting rod is respectively connected to the two groups of pushing rod pin shafts.

[0010] Preferably, one end of the fourth connecting rod is hinged to the support frame, and the other end of the fourth connecting rod is respectively connected to two groups of push rod pins, and the fourth connecting rod is located directly above the third connecting rod and parallel to the third connecting rod.

[0011] Preferably, the proportion adjustment device includes a ring, a rotating handle and a semicircular plate. The ring is a hollow structure. The semicircular plate is arranged at the bottom of the ring. The bottom area of ​​the semicircular plate occupies half of the hollow area of ​​the bottom of the ring. The ring is sleeved on the outside of the leakage. The top surface of the semicircular plate is respectively against the bottom surface of the leakage and the partition. The ring passes through the bearing, and the middle position of the outer wall of the ring is welded to the inner ring of the bearing.

[0012] Preferably, the rotating handle is fixed to the upper part of the outer side wall of the collar, the end of the rotating handle is a pointed structure, the end of the rotating handle does not contact the surface of the fixed plate, and the central axis of the rotating handle is perpendicular to and intersects with the central axis of the semicircular plate.

[0013] Preferably, a half circle scale is provided on the fixing plate along the outer side of the bearing, the end of the rotating handle points to the scale, and the index range of the scale is 0% to 100%.

[0014] Preferably, the primary air box comprises a box body, a primary fan and an inverted bucket, an inverted bucket is provided in the middle of the top of the box body, the bottom of the collar extends into the inverted bucket, a primary fan is provided at one end of the box body, and a material conveying pipe is connected to the other end.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model rotates the handle manually to make the sleeve ring rotate a certain angle in the bearing, and the sleeve ring then drives the semicircular plate to rotate concentrically. The discharge amount and discharge ratio of the coal powder and auxiliary material discharge ports in the leakage port are controlled by adjusting the covering area of ​​the semicircular plate.

[0017] 2. The utility model starts the pushing motor during the feeding process of coal powder and auxiliary materials. The output shaft of the pushing motor drives the first connecting rod to rotate concentrically. The first connecting rod and the second connecting rod form a crank structure and form an automatic reciprocating motion, pushing the third connecting rod to perform a pendulum motion around the rotating shaft on the support frame, so that the third connecting rod drives the pushing rod and the pushing plate to perform up and down reciprocating motion, so that the two groups of pushing plates can respectively press and push the coal powder and auxiliary materials in the box body continuously downward, making the feeding process smoother and preventing jamming due to the small feeding port; the fourth connecting rod is arranged to allow the pushing rod to move vertically up and down, thereby improving the stability of the pressing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the first axonometric drawing of the overall structure of the utility model;

[0019] Figure 2 It is the second axonometric drawing of the overall structure of the utility model;

[0020] Figure 3 It is a top view of the overall structure of the utility model;

[0021] Figure 4 It is a partial structural cross-sectional view of the utility model;

[0022] Figure 5 The utility model is an exploded view of the material dumping box and the proportioning device.

[0023] In the figure: 1. bottom plate; 2. bracket; 3. dump box; 31. leakage; 32. partition; 4. pushing device; 41. first connecting rod; 42. second connecting rod; 43. third connecting rod; 44. fourth connecting rod; 45. pushing rod; 46. pushing plate; 47. fixing frame; 48. pushing motor; 49. supporting frame; 5. proportional adjustment device; 51. sleeve ring; 52. rotating handle; 53. semicircular plate; 6. fixing plate; 61. scale; 7. bearing; 8. primary bellows; 81. box body; 82. primary fan; 83. dump bucket; 9. feeding pipe; 10. burner. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In order to solve the problem that the feed ratio cannot be adjusted in the prior art, the following technical solution is provided. Figure 1-5 ;

[0026] A pulverized coal burner with adjustable feed ratio comprises a base plate 1 and a bracket 2, four brackets 2 are fixed on one side of the base plate 1, a dump box 3 is installed on the top of the bracket 2, a pushing device 4 is provided on one side of the dump box 3, a ratio adjusting device 5 is connected to the bottom of the dump box 3, a fixing plate 6 is installed in the middle of the bracket 2, a bearing 7 is provided at the center of the fixing plate 6, the ratio adjusting device 5 passes through the bearing 7 and is fixed to the inner ring of the bearing 7, a primary wind box 8 is placed directly below the ratio adjusting device 5, and the primary wind box 8 is connected to a burner 10 placed on the other side of the base plate 1 through a feed pipe 9.

[0027] The material dumping box 3 is a funnel-shaped structure as a whole, with a leak 31 at the bottom and a partition 32 on the inner wall of the material dumping box 3. The internal space of the material dumping box 3 is divided into two halves by the partition 32. Half of the space close to the pushing device 4 is the coal powder feeding area, and the other half of the space is the auxiliary material feeding area.

[0028] The pushing device 4 includes a first connecting rod 41, a second connecting rod 42, a third connecting rod 43, a fourth connecting rod 44, a pushing rod 45, a pushing plate 46, a fixing frame 47, a pushing motor 48 and a supporting frame 49. The bottom end of the pushing rod 45 is fixedly connected to the pushing plate 46. The pushing rod 45 and the pushing plate 46 are an integrated structure. There are two groups of pushing rods 45 and pushing plates 46 and they are respectively located on both sides of the partition 32.

[0029] The fixing frame 47 and the supporting frame 49 are both welded to the outer wall of one side of the dump box 3, and a pushing motor 48 is installed on the outer side of the top end of the supporting frame 49. The first connecting rod 41 is fixed on the output shaft of the pushing motor 48, and the first connecting rod 41 is pin-connected with the second connecting rod 42. The middle part of the third connecting rod 43 is hinged to the supporting frame 49, the short rod of the third connecting rod 43 is pin-connected with the second connecting rod 42, and the long rod of the third connecting rod 43 is pin-connected with the two groups of pushing rods 45 respectively.

[0030] One end of the fourth connecting rod 44 is hinged to the support frame 49 , and the other end of the fourth connecting rod 44 is pin-connected to two sets of push rods 45 . The fourth connecting rod 44 is located directly above the third connecting rod 43 and parallel to the third connecting rod 43 .

[0031] The proportion adjusting device 5 comprises a collar 51, a rotating handle 52 and a semicircular plate 53. The collar 51 is a hollow structure. The semicircular plate 53 is arranged at the bottom of the collar 51. The bottom area of ​​the semicircular plate 53 accounts for half of the hollow area of ​​the bottom of the collar 51. The collar 51 is sleeved on the outside of the leakage opening 31. The top surface of the semicircular plate 53 is respectively against the bottom surface of the leakage opening 31 and the partition plate 32. The collar 51 passes through the bearing 7. The middle position of the outer wall of the collar 51 is welded to the inner ring of the bearing 7.

[0032] The rotating handle 52 is fixed to the upper part of the outer wall of the collar 51 . The end of the rotating handle 52 is a pointed structure. The end of the rotating handle 52 does not contact the surface of the fixed plate 6 . The central axis of the rotating handle 52 is perpendicular to and intersects with the central axis of the semicircular plate 53 .

[0033] A half circle scale 61 is provided on the fixing plate 6 along the outer side of the bearing 7 , and the end of the rotating handle 52 points to the scale 61 , and the index range of the scale 61 is from 0% to 100%.

[0034] The primary air box 8 comprises a box body 81, a primary air fan 82 and an inverted bucket 83. The inverted bucket 83 is provided in the middle of the top of the box body 81, and the bottom of the collar 51 extends into the inverted bucket 83. The primary air fan 82 is provided at one end of the box body 81, and the other end is connected to the conveying pipe 9.

[0035] Specifically, when in use, first turn on the primary fan 82 to form a vortex in the box 81, and then place the coal powder and auxiliary materials into the coal powder feeding area and the auxiliary material feeding area respectively. The coal powder and the auxiliary materials enter the box 81 through the leak 31 and the inverted bucket 83 respectively. The coal powder and the auxiliary materials are mixed in the box 81 under the action of the vortex and are blown into the feed pipe 9, and then enter the burner 10. After meeting the secondary air in the burner 10, they are ignited, and finally ejected from the nozzle of the burner 10 to enter the furnace to continue burning.

[0036] Specifically, when it is necessary to adjust the ratio of the two fuels entering the box body 81, the handle 52 is manually operated to rotate the ring 51 in the bearing 7 at a certain angle, and the ring 51 then drives the semicircular plate 53 to rotate concentrically, and the discharge amount and discharge ratio of the two are controlled by adjusting the covering area of ​​the semicircular plate 53 on the discharge port of the coal powder and the auxiliary material in the leakage port 31; when the end of the rotating handle 52 points to the 50% mark on the scale 61, it means that the covering area of ​​the semicircular plate 53 on the discharge port of the coal powder and the auxiliary material is equal, and the ratio of the coal powder to the auxiliary material is 1:1; when the end of the rotating handle 52 points to the 100% mark on the scale 61, it means that the semicircular plate 53 completely covers the discharge port of the auxiliary material, and the discharge port of the coal powder is completely open, and the ratio of the coal powder to the entire fuel is 100%, and so on.

[0037] Specifically, during the feeding process of coal powder and auxiliary materials, the pushing motor 48 is started, and the output shaft of the pushing motor 48 drives the first connecting rod 41 to rotate concentrically. The first connecting rod 41 and the second connecting rod 42 form a crank structure and form an automatic reciprocating motion, pushing the third connecting rod 43 to perform a pendulum motion around the rotating shaft on the support frame 49, so that the third connecting rod 43 drives the pushing rod 45 and the pushing plate 46 to perform up and down reciprocating motion, so that the two groups of pushing plates 46 can respectively press and push the coal powder and auxiliary materials in the box body 81 downward continuously, making the feeding process smoother and preventing jamming due to the small feeding port; the fourth connecting rod 44 is arranged to allow the pushing rod 45 to move vertically up and down, thereby improving the stability of the pressing process.

[0038] Working principle: When in use, first turn on the primary fan 82 to form a vortex in the box 81, then place the coal powder and auxiliary materials into the coal powder feeding area and the auxiliary material feeding area respectively, and the coal powder and auxiliary materials enter the box 81 through the leak 31 and the inverted bucket 83 respectively. The coal powder and auxiliary materials are mixed in the box 81 under the action of the vortex and are blown into the feed pipe 9, and then enter the burner 10, and are ignited after meeting the secondary air in the burner 10, and finally are ejected from the nozzle of the burner 10 to enter the furnace and continue to burn; when it is necessary to adjust the ratio of the two fuels entering the box 81, the handle 52 is manually operated to rotate the ring 51 in the bearing 7 to a certain angle, and the ring 51 then drives the semicircular plate 53 produces concentric rotation, and the discharge amount and discharge ratio of the two are controlled by adjusting the covering area of ​​the semicircular plate 53 on the discharge port of the coal powder and auxiliary materials in the leakage port 31; in the discharge process of the coal powder and auxiliary materials, the pushing motor 48 is started, and the output shaft of the pushing motor 48 drives the first connecting rod 41 to rotate concentrically, and the first connecting rod 41 and the second connecting rod 42 form a crank structure and form an automatic reciprocating motion, pushing the third connecting rod 43 to perform a pendulum motion around the rotating shaft on the support frame 49, so that the third connecting rod 43 drives the pushing rod 45 and the pushing plate 46 to perform up and down reciprocating motion, so that the two groups of pushing plates 46 can respectively press and push the coal powder and auxiliary materials in the box body 81 downward continuously, making the discharge process smoother.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulverized coal burner with adjustable feed ratio, comprising a base plate (1) and a bracket (2), characterized in that: Four brackets (2) are fixed on one side of the base plate (1), a material dumping box (3) is installed on the top of the bracket (2), a material pushing device (4) is provided on one side of the material dumping box (3), a ratio adjustment device (5) is connected to the bottom of the material dumping box (3), a fixing plate (6) is installed in the middle of the bracket (2), a bearing (7) is provided at the center of the fixing plate (6), the ratio adjustment device (5) passes through the bearing (7) and is fixed to the inner ring of the bearing (7), a primary wind box (8) is placed directly below the ratio adjustment device (5), and the primary wind box (8) is connected to a burner (10) placed on the other side of the base plate (1) through a material delivery pipe (9).

2. A pulverized coal burner with adjustable feed ratio according to claim 1, characterized in that: The material dumping box (3) is of a funnel-shaped structure as a whole. A leaking opening (31) is provided at the bottom of the material dumping box (3). A partition (32) is provided on the inner wall of the material dumping box (3). The internal space of the material dumping box (3) is divided into two halves by the partition (32). The half of the space close to the pushing device (4) is a coal powder feeding area, and the other half of the space is an auxiliary material feeding area.

3. The pulverized coal burner with adjustable feed ratio according to claim 1, characterized in that: The pushing device (4) comprises a first connecting rod (41), a second connecting rod (42), a third connecting rod (43), a fourth connecting rod (44), a pushing rod (45), a pushing plate (46), a fixing frame (47), a pushing motor (48) and a supporting frame (49); the bottom end of the pushing rod (45) is fixedly connected to the pushing plate (46); the pushing rod (45) and the pushing plate (46) are an integrated structure; the pushing rod (45) and the pushing plate (46) are provided in two groups and are respectively located on two sides of the partition (32).

4. A pulverized coal burner with adjustable feed ratio according to claim 3, characterized in that: The fixing frame (47) and the supporting frame (49) are both welded to the outer wall of one side of the material dumping box (3); a material pushing motor (48) is installed on the outer side of the top end of the supporting frame (49); a first connecting rod (41) is fixed to the output shaft of the material pushing motor (48); the first connecting rod (41) is pin-connected to the second connecting rod (42); the middle part of the third connecting rod (43) is hinged to the supporting frame (49); the short rod of the third connecting rod (43) is pin-connected to the second connecting rod (42); and the long rod of the third connecting rod (43) is pin-connected to the two groups of material pushing rods (45) respectively.

5. The pulverized coal burner with adjustable feed ratio according to claim 3, characterized in that: One end of the fourth connecting rod (44) is hinged to the support frame (49), and the other end of the fourth connecting rod (44) is respectively connected to the two sets of push rods (45) by pins. The fourth connecting rod (44) is located directly above the third connecting rod (43) and is parallel to the third connecting rod (43).

6. The pulverized coal burner with adjustable feed ratio according to claim 1, characterized in that: The proportion adjusting device (5) comprises a collar (51), a rotating handle (52) and a semicircular plate (53). The collar (51) is a hollow structure. The semicircular plate (53) is arranged at the bottom of the collar (51). The bottom area of ​​the semicircular plate (53) accounts for half of the hollow area of ​​the bottom of the collar (51). The collar (51) is sleeved on the outside of the leakage opening (31). The top surface of the semicircular plate (53) is respectively against the bottom surface of the leakage opening (31) and the partition plate (32). The collar (51) passes through the bearing (7). The middle part of the outer wall of the collar (51) is welded to the inner ring of the bearing (7).

7. A pulverized coal burner with adjustable feed ratio according to claim 6, characterized in that: The rotating handle (52) is fixed to the upper part of the outer wall of the collar (51), the end of the rotating handle (52) is a pointed structure, the end of the rotating handle (52) does not contact the surface of the fixed plate (6), and the central axis of the rotating handle (52) is perpendicular to and intersects with the central axis of the semicircular plate (53).

8. The pulverized coal burner with adjustable feed ratio according to claim 1, characterized in that: A half-circle scale (61) is provided on the fixed plate (6) along the outer side of the bearing (7), and the end of the rotating handle (52) points to the scale (61), and the index range of the scale (61) is from 0% to 100%.

9. The pulverized coal burner with adjustable feed ratio according to claim 1, characterized in that: The primary wind box (8) comprises a box body (81), a primary fan (82) and an inverted bucket (83). The inverted bucket (83) is provided in the middle of the top of the box body (81), and the bottom of the collar (51) extends into the inverted bucket (83). The primary fan (82) is provided at one end of the box body (81), and the other end is connected to a material conveying pipe (9).

Images