Pulverized coal feeding structure of efficient burner of boiler

Abstract

The utility model relates to a pulverized coal feeding structure of an efficient burner of a boiler, which is characterized by comprising a pulverized coal feeding pipe arranged on the outer wall of a boiler hearth, and a V-shaped baffle with an outward tip is fixedly welded on the inner wall of one side of the pulverized coal feeding pipe. A first pulverized coal feeding adjusting plate is arranged in the end, connected with a boiler hearth, of the pulverized coal feeding pipe, and two pulverized coal feeding adjusting plates are sequentially arranged in the portion, between the V-shaped baffle and the first pulverized coal feeding adjusting plate, of the pulverized coal feeding pipe. Through the V-shaped baffle and the pulverized coal feeding adjusting plate which are arranged in the pulverized coal feeding pipe, pulverized coal can be subjected to concentration separation, combustion is facilitated, coking caused by too high temperature due to too concentrated pulverized coal feeding is prevented, and the function of improving the practical performance is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coal powder feeding pipeline, concretely relates to a coal powder feeding structure of high -efficient combustor of boiler. BACKGROUND

[0002] Coal powder needs to be transported into the boiler during thermal power generation, and the existing coal powder is transported through a pipeline, but in the actual use process, it is easy to cause the middle temperature of the flame to be too high due to the too concentrated coal powder feeding, coking is easy to produce, not only there is a security risk, but also the heat exchange efficiency is reduced, energy consumption is increased, and the surrounding environment is easy to pollute, so in order to solve the above problems, a kind of coal powder feeding structure of high -efficient combustor of boiler is particularly important. SUMMARY

[0003] The utility model discloses in order to solve above -mentioned problem designs a kind of coal powder feeding structure of high -efficient combustor of boiler, by the V-shaped baffle and coal powder feeding adjusting plate being arranged in coal powder feeding pipe can make coal powder concentration separation, it is favorable to combustion, prevent coal powder feeding too concentrated and cause temperature to be too high and produce coking, played the role of increasing practicality.

[0004] To solve the above technical problems, the utility model provides a kind of coal powder feeding structure of high -efficient combustor of boiler, it is characterized by: including the coal powder feeding pipe being set on the outer wall of boiler furnace, the four corners of the boiler furnace are connected with a coal powder feeding pipe, the lower of four coal powder feeding pipes is provided with a gas pipeline, the inner wall of the side of the coal powder feeding pipe is welded with the V-shaped baffle of the tip outward, the end of the coal powder feeding pipe and the boiler furnace is provided with the first coal powder feeding adjusting plate, the first coal powder feeding adjusting plate is sleeved on the outside of the first rotating shaft, the upper end of the first rotating shaft is connected with the first adjusting mechanism and extends the coal powder feeding pipe, the coal powder feeding pipe between the V-shaped baffle and the first coal powder feeding adjusting plate is also provided with two coal powder feeding adjusting plates in sequence, two coal powder feeding adjusting plates are divided into second coal powder feeding adjusting plate and third coal powder feeding adjusting plate, second coal powder feeding adjusting plate and third coal powder feeding adjusting plate are respectively sleeved on the second rotating shaft and the third rotating shaft, the upper end of the second rotating shaft and the third rotating shaft is connected with the second adjusting mechanism and extends the coal powder feeding pipe.

[0005] Further: the center line of four coal powder feeding pipes is circular and tangential to the center of the boiler furnace.

[0006] Further: the first adjusting mechanism includes the first adjusting servo motor being installed on the top of the coal powder feeding pipe, adjusting gear and transmission gear, the transmission gear is sleeved on the one end of the first rotating shaft and extends the coal powder feeding pipe, the adjusting gear is sleeved on the output shaft of the first adjusting servo motor, the transmission gear and the adjusting gear are engaged with each other.

[0007] Still further: the second adjusting mechanism comprises a mounting base, lock blocks, locking gears, adjusting pinions, springs and gear rotation adjusting mechanisms, the mounting base is provided with guide grooves at two ends opposite to the extension positions of the second rotating shaft and the third rotating shaft, the lock blocks are provided in two, the two lock blocks are matched with the guide grooves and are respectively slidably connected in the two guide grooves through the springs, the second rotating shaft and the third rotating shaft are respectively sleeved with a locking gear at one end of the extension position, the side of the lock block facing the locking gear is provided with an arc-shaped recess, the inner wall of the arc-shaped recess is provided with locking teeth structures, the two locking teeth structures are in contact with the two locking gears through the springs to lock the second rotating shaft and the third rotating shaft, the second rotating shaft and the third rotating shaft above the locking gears are respectively sleeved with an adjusting pinion, the two adjusting pinions are respectively connected with a gear rotation adjusting mechanism arranged on the mounting base, the outer wall of the mounting base on one side of the two guide grooves is respectively provided with an extension electric cylinder, the extension electric cylinder is connected with a pull plate at the shaft end, the mounting base is provided with a through groove on the side wall opposite to the pull plate, the side wall of the lock block is also provided with a pull groove matched with the pull plate, the end of the pull groove away from the spring is in an open state, the pull plate passes through the through groove and extends into the pull groove, and the pull plate can slide along the through groove.

[0008] Still further: the gear rotation adjusting mechanism comprises an adjusting electric cylinder, a transmission plate and a transmission rack, the adjusting electric cylinder is fixed on the top of the mounting base, the transmission rack is composed of a transmission rod and a rack structure, the shaft end of the adjusting electric cylinder is connected with the transmission rod through the transmission plate, the top of the mounting base is provided with a guide sleeve relative to the two transmission rods, the end of the transmission rod away from the transmission plate passes through the guide sleeve and is connected with the rack structure, and the rack structure is meshed with the adjusting pinion.

[0009] After the above structure is adopted, the V-shaped baffle arranged in the coal powder feeding pipe and the coal powder feeding adjusting plate can separate the coal powder, which is beneficial to combustion and prevents the temperature from being too high to cause coking due to the too concentrated coal powder feeding, and the practicality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model will be explained further in detail in combination with the drawings and specific embodiment.

[0011] Figure 1 It is the structural diagram of the utility model.

[0012] Figure 2 It is the structural diagram of the utility model. Figure 1 It is the enlarged view of A in the middle.

[0013] Figure 3It is a local plan view of the coal powder feeding pipe.

[0014] Figure 4 It is Figure 3 An enlarged view of the middle B. DETAILED DESCRIPTION

[0015] As Figure 1 And Figure 2 A high-efficiency boiler burner coal powder feeding structure is shown in the drawings, which comprises coal powder feeding pipes 3 arranged on the outer wall of a boiler furnace 1, one coal powder feeding pipe is arranged in each of the four corners of the boiler furnace, and one air feeding pipe 2 is arranged below each of the four coal powder feeding pipes, a V-shaped baffle 4 with a pointed end outward is welded and fixed on the inner wall of one side of the coal powder feeding pipe, a first coal powder feeding adjusting plate 7 is arranged in the end of the coal powder feeding pipe connected with the boiler furnace, the first coal powder feeding adjusting plate is sleeved on the outer side of a first rotating shaft, the upper end of the first rotating shaft extends out of the coal powder feeding pipe and is connected with a first adjusting mechanism, two coal powder feeding adjusting plates are further arranged in the coal powder feeding pipe between the V-shaped baffle and the first coal powder feeding adjusting plate, the two coal powder feeding adjusting plates are divided into a second coal powder feeding adjusting plate 5 and a third coal powder feeding adjusting plate 6, the second coal powder feeding adjusting plate and the third coal powder feeding adjusting plate are respectively sleeved on a second rotating shaft and a third rotating shaft, and the upper ends of the second rotating shaft and the third rotating shaft extend out of the coal powder feeding pipe and are connected with a second adjusting mechanism. The V-shaped baffle arranged in the coal powder feeding pipe and the coal powder feeding adjusting plates can separate the thick and thin coal powder, which is beneficial to combustion and prevents coking caused by excessive concentration of coal powder feeding, and the practicality is improved.

[0016] As Figure 1 The center lines of the four coal powder feeding pipes are tangentially circular relative to the center of the boiler furnace. The design adopts tangential circular combustion, which can better exchange heat with the water cooling wall.

[0017] As Figure 3 The first adjusting mechanism comprises a first adjusting servo motor, an adjusting gear 17 and a transmission gear 18 arranged on the top of the coal powder feeding pipe, the transmission gear is sleeved on one end of the first rotating shaft extending out of the coal powder feeding pipe, the adjusting gear 17 is sleeved on the output shaft of the first adjusting servo motor, and the transmission gear and the adjusting gear are mutually engaged. The first adjusting servo motor is controlled to make the first coal powder feeding adjusting plate deflect at a specified angle by the cooperation of the adjusting gear and the transmission gear.

[0018] As Figure 4The second adjusting mechanism comprises a mounting base 19, lock blocks 11, locking gears 20, adjusting pinions 8, springs 12 and gear rotation adjusting mechanisms, the two ends of the mounting base are provided with guide grooves opposite to the extending positions of the second rotating shaft and the third rotating shaft, the lock blocks are provided with two, the two lock blocks are matched with the guide grooves and are slidably connected in the two guide grooves through the springs, one locking gear is sleeved on the extending end of the second rotating shaft and the third rotating shaft respectively, arc-shaped grooves are formed on the sides of the lock blocks facing the locking gears, locking gear teeth structures are arranged on the inner walls of the arc-shaped grooves, the two locking gear teeth structures are in contact with the two locking gears through the springs to lock the second rotating shaft and the third rotating shaft, one adjusting pinion is sleeved on the second rotating shaft and the third rotating shaft above the locking gears respectively, the two adjusting pinions are connected with the gear rotation adjusting mechanisms arranged on the mounting base respectively, one telescopic cylinder 14 is arranged on the outer wall of the mounting base on one side of the two guide grooves, the shaft end of the telescopic cylinder is connected with a pull plate 13, a through groove is formed on the side wall of the mounting base opposite to the pull plate, a pull groove matched with the pull plate is formed on the side wall of the lock block, the end of the pull groove away from the spring is open, the pull plate passes through the through groove and extends into the pull groove, and the pull plate can slide along the through groove; the gear rotation adjusting mechanism comprises an adjusting cylinder 10, a transmission plate and a transmission rack 15, the adjusting cylinder is fixed on the top of the mounting base, the transmission rack is composed of a transmission rod and a rack structure, the shaft end of the adjusting cylinder is connected with the transmission rod through the transmission plate, a guide sleeve 9 is arranged on the top of the mounting base relative to the two transmission rods, the end of the transmission rod away from the transmission plate passes through the guide sleeve and is connected with the rack structure, and the rack structure is meshed with the adjusting pinion. When the second coal powder feeding adjusting plate and the third coal powder feeding adjusting plate need to be adjusted, the two telescopic cylinders are started first to separate the lock blocks from the locking gears, at this time, the second coal powder feeding adjusting plate and the third coal powder feeding adjusting plate are deflected by a specified angle through the gear rotation adjusting mechanism and the adjusting pinion, after the adjustment is completed, the telescopic cylinders are started reversely, at this time, the lock blocks are locked with the locking gears again under the action of the springs. The utility model has the advantages of simple structure, convenient use and high efficiency.

[0019] The preferred embodiments of the utility model are described above, and the protection scope of the utility model is not limited to the above-mentioned embodiments. Any technical scheme falling within the concept of the utility model belongs to the protection scope of the utility model. It should be noted that some improvements and decorations of the utility model without departing from the principle of the utility model are considered as the protection scope of the utility model.

Claims

1. A pulverized coal feeding structure for a high-efficiency boiler burner, characterized in that: This includes a pulverized coal feed pipe (3) installed on the outer wall of the boiler furnace (1). Each of the four corners of the boiler furnace is connected to a pulverized coal feed pipe, and a gas supply pipe (2) is installed directly below each of the four pulverized coal feed pipes. A V-shaped baffle (4) with its tip pointing outwards is welded and fixed to the inner wall of one side of each pulverized coal feed pipe. A first pulverized coal feed regulating plate (7) is installed inside the end of the pulverized coal feed pipe connected to the boiler furnace. The first pulverized coal feed regulating plate is fitted onto the outside of a first rotating shaft. The upper end of the shaft extends out of the pulverized coal feed pipe and is connected to the first adjustment mechanism. Two pulverized coal feed adjustment plates are also sequentially arranged in the pulverized coal feed pipe between the V-shaped baffle and the first pulverized coal feed adjustment plate. The two pulverized coal feed adjustment plates are divided into a second pulverized coal feed adjustment plate (5) and a third pulverized coal feed adjustment plate (6). The second pulverized coal feed adjustment plate and the third pulverized coal feed adjustment plate are respectively mounted on the second rotating shaft and the third rotating shaft. The upper ends of the second rotating shaft and the third rotating shaft extend out of the pulverized coal feed pipe and are connected to the second adjustment mechanism.

2. The pulverized coal feeding structure for a high-efficiency boiler burner according to claim 1, characterized in that: The centerlines of the four pulverized coal feed pipes are tangent to each other in a circular shape with the center of the boiler furnace as the reference point.

3. The pulverized coal feeding structure for a high-efficiency boiler burner according to claim 1, characterized in that: The first adjustment mechanism includes a first adjustment servo motor, an adjustment gear (17), and a transmission gear (18) installed at the top of the pulverized coal feed pipe. The transmission gear is mounted on one end of the first rotating shaft extending out of the pulverized coal feed pipe. The adjustment gear (17) is mounted on the output shaft of the first adjustment servo motor. The transmission gear and the adjustment gear mesh with each other.

4. The pulverized coal feeding structure for a high-efficiency boiler burner according to claim 1, characterized in that: The second adjustment mechanism includes a mounting base (19), a locking block (11), a locking gear (20), an adjusting pinion (8), a spring (12), and a gear rotation adjustment mechanism. The mounting base has guide grooves at both ends facing the extension positions of the second and third rotating shafts. Two locking blocks are provided, each matching the guide groove and slidably connected within the two guide grooves via springs. A locking gear is fitted onto the extension end of each of the second and third rotating shafts. An arc-shaped groove is provided on the side of the locking block facing the locking gear, and a locking tooth structure is provided on the inner wall of the arc-shaped groove. The two locking tooth structures are connected to the two locking gears via springs. The locking gear contacts and locks the second and third rotating shafts. Each of the second and third rotating shafts above the locking gear is fitted with an adjusting pinion. Each of the two adjusting pinions is connected to a gear rotation adjustment mechanism set on the mounting base. Each of the two guide slots is equipped with a telescopic electric cylinder (14) on the outer wall of the mounting base. The output shaft end of the telescopic electric cylinder is connected to the pull plate (13). A through groove is opened on the side wall of the mounting base opposite the pull plate. A pull groove matching the pull plate is also opened on the side wall of the locking block. The end of the pull groove away from the spring is open. The pull plate passes through the through groove and extends into the pull groove. The pull plate can slide along the through groove.

5. The pulverized coal feeding structure for a high-efficiency boiler burner according to claim 4, characterized in that: The gear rotation adjustment mechanism includes an adjustment electric cylinder (10), a transmission plate, and a transmission rack (15). The adjustment electric cylinder is fixed on the top of the mounting base. The transmission rack is composed of a transmission rod and a rack structure integrated together. The output shaft end of the adjustment electric cylinder is connected to the transmission rod through the transmission plate. A guide sleeve (9) is provided on the top of the mounting base at a position relative to the two transmission rods. The end of the transmission rod away from the transmission plate passes through the guide sleeve and is connected to the rack structure. The rack structure meshes with the adjustment pinion.

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