CN213146546U - Coal feeding device of circulating fluidized bed boiler - Google Patents
Coal feeding device of circulating fluidized bed boiler Download PDFInfo
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- CN213146546U CN213146546U CN202021765740.1U CN202021765740U CN213146546U CN 213146546 U CN213146546 U CN 213146546U CN 202021765740 U CN202021765740 U CN 202021765740U CN 213146546 U CN213146546 U CN 213146546U
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Abstract
A coal feeding device of a circulating fluidized bed boiler belongs to the field of coal feeding of boilers, and aims to solve the problems that coal blocks fall into a coal conveying pipe under the action of gravity, the inner wall of the coal conveying pipe is scoured and abraded greatly, the coal conveying pipe is easy to be abraded seriously after a long time, the local pipe wall is thinned, and the coal conveying pipe is abraded when the coal conveying pipe is serious, so that coal leakage of the coal conveying pipe is caused, coal particles enter a hearth and are unsmooth, and the safe and stable operation of the boiler is influenced, the coal conveying pipe is arranged on the outer side of a water-cooled wall, one end of the coal conveying pipe is welded and fixed with two sides of fins of the water-cooled wall, a coal conveying pipe sealing box is arranged at the communication position of the coal conveying pipe and the water-cooled wall, a coal inlet pipe is arranged above the other end of the coal conveying pipe, a coal conveying air pipe is arranged at the other end of the coal conveying pipe, a coal feeding reinforcing box is arranged below the coal feeding pipe, the coal reinforcing, the utility model discloses mainly used transports coal charge to the boiler.
Description
Technical Field
The utility model belongs to the boiler coal feeding field, concretely relates to circulating fluidized bed boiler coal feeding device.
Background
Most of the used fuels of the circulating fluidized bed boiler are coal, the coal passes through a coal feeder in a coal bunker, then naturally falls into a coal feeder of the boiler by means of gravity, and finally enters a hearth of the boiler for combustion. When the coal particles pass through the coal feeding device, the coal particles directly fall into the coal conveying pipe under the influence of gravity, the scouring abrasion is large, the coal conveying pipe is easy to be seriously abraded after a long time, the local pipe wall is thinned, the coal conveying pipe is abraded when the coal conveying pipe is serious, the coal leakage of the coal conveying pipe is caused, the coal particles are unsmooth when the coal conveying pipe enters a hearth, the problems of the type are repeatedly found when the traditional circulating fluidized bed coal feeding device operates, the safe and stable operation of a boiler is influenced, and a large amount of economic loss is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the coal blocks fall into the coal conveying pipe under the action of gravity, the inner wall of the coal conveying pipe is eroded and abraded greatly, the coal conveying pipe is abraded seriously after a long time, the local pipe wall is thinned, and the coal conveying pipe is worn to break when the abrasion is serious, so that the coal leakage of the coal conveying pipe is caused, coal particles enter a hearth and are unsmooth, and the safe and stable operation of a boiler is influenced; further provides a coal feeding device of the circulating fluidized bed boiler.
A coal feeding device of a circulating fluidized bed boiler is arranged on the outer side of a water-cooled wall and is communicated with the water-cooled wall, and is characterized in that the coal feeding device comprises a coal conveying pipe, a pipe clamp, a coal feeding reinforcing box, a high-strength wear-resistant castable, a coal conveying air pipe and a coal conveying pipe sealing box;
the coal conveying pipe is arranged on the outer side of the water-cooled wall, the axis of the coal conveying pipe is obliquely arranged relative to the water-cooled wall, one end of the coal conveying pipe is communicated with the water-cooled wall, a coal conveying pipe sealing box is arranged at the communication position of the coal conveying pipe and the water-cooled wall, the coal conveying pipe sealing box is arranged on the outer side of the water-cooled wall and is fixedly connected with the water-cooled wall, a coal inlet pipe is arranged above the other end of the coal conveying pipe, the axis of the coal inlet pipe extends along the vertical direction, the coal inlet pipe is communicated with the coal conveying pipe, a coal conveying air pipe is arranged at the other end of the coal conveying pipe, a coal conveying air pipe is communicated with the coal conveying pipe, a coal feeding reinforcing box is arranged below the coal inlet pipe, the coal feeding reinforcing box is fixedly connected on the outer side wall of the coal conveying pipe and corresponds to a coal outlet of the coal inlet pipe, high-strength wear-resistant castable is filled in the coal feeding reinforcing box, a pipe clamp is arranged between the coal conveying pipe and the water-cooled wall, one, the clamping end of the pipe clamp is clamped on the coal conveying pipe;
furthermore, a metal corrugated pipe expansion joint is arranged on a coal inlet of the coal inlet pipe, and one end of the metal corrugated pipe expansion joint is communicated with the coal inlet of the coal inlet pipe;
furthermore, the coal feeding device also comprises a fixed steel plate, the fixed steel plate is arranged between the coal conveying pipe and the water-cooled wall, one end of the fixed steel plate is fixedly connected with the water-cooled wall, and the other end of the fixed steel plate is fixedly connected with the outer wall of the coal conveying pipe;
the coal feeding device further comprises a coal-feeding air sealing box and a coal-feeding air pipe, wherein the coal-feeding air pipe is arranged at the joint of the coal conveying pipe and the water-cooled wall, one end of the coal-feeding air pipe is communicated with the coal conveying pipe, the coal-feeding air sealing box is arranged at the joint of the coal-feeding air pipe and the coal conveying pipe, and the coal-feeding air sealing box is welded on the water-cooled wall;
further, the axis of the coal-sowing air pipe extends along the horizontal direction;
further, the inclination angle of the axis of the coal conveying pipe relative to the vertical direction is 45-60 degrees;
furthermore, the clamping end of the pipe clamp is matched with the coal conveying pipe, two groups of connecting holes are formed in the clamping end of the pipe clamp, the two groups of connecting holes are symmetrically arranged relative to the axis of the coal conveying pipe, and a connecting assembly is arranged in each group of connecting holes;
further, the connecting assembly is a bolt-nut mechanism;
in one pen, the coal feeding reinforcing box is matched with the inner wall of the coal conveying pipe, the contact surface of the coal feeding reinforcing box and the coal conveying pipe is an arc-shaped surface, and the central angle corresponding to the arc-shaped surface is 150 degrees.
Compared with the prior art, the utility model following beneficial effect has:
compared with the prior circulating fluidized bed boiler coal feeding device, the circulating fluidized bed boiler coal feeding device increases the coal feeding reinforcing box corresponding to the coal falling outlet of the coal conveying pipe, and the high-strength wear-resistant castable is filled in the coal feeding reinforcing box, so the rigidity of the position can be enhanced, the deformation of the position can be reduced, after the running time is long, even if the original coal falling pipe is seriously worn or even is abraded, the high-strength wear-resistant castable at the position also has very strong wear resistance, the normal work of the coal feeding device can be ensured, coal particles can smoothly enter a hearth, the intensity of the impact wear point of the coal falling pipe in the coal feeding device can be enhanced, the problem that the boiler coal feeding is unsmooth due to the damage of the coal conveying pipe in the coal feeding device and even stops the boiler is completely solved, the service life of the coal feeding device can be prolonged, and the maintenance times of the coal feeding device are reduced, the cost is saved, and meanwhile, the long-term safe and stable operation of the boiler is ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a view from A-A direction of the present invention;
in the figure, 1 a coal conveying pipe, 2 pipe clamps, 3 a metal corrugated pipe expansion joint, 4 coal feeding reinforcing boxes, 5 high-strength wear-resistant castable, 6 coal-feeding air sealing boxes, 7 coal conveying air pipes, 8 coal-feeding air pipes, 9 coal conveying pipe sealing boxes, 10 fixed steel plates and 11 water-cooled walls.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 and 2, and provides a coal feeding device of a circulating fluidized bed boiler, wherein the coal feeding device is arranged on the outer side of a water-cooled wall 11 and is communicated with the water-cooled wall 11, and the coal feeding device is characterized by comprising a coal conveying pipe 1, a pipe clamp 2, a coal feeding reinforcing box 4, a high-strength wear-resistant castable 5, a coal conveying air pipe 7 and a coal conveying pipe sealing box 9;
the coal conveying pipe 1 is arranged on the outer side of the water-cooled wall 11, the axis of the coal conveying pipe 1 is obliquely arranged relative to the water-cooled wall 11, one end of the coal conveying pipe 1 is communicated with the water-cooled wall 11, a coal conveying pipe sealing box 9 is arranged at the communication position of the coal conveying pipe 1 and the water-cooled wall 11, the coal conveying pipe sealing box 9 is arranged on the outer side of the water-cooled wall 11, the coal conveying pipe sealing box 9 is fixedly connected with the water-cooled wall 11, a coal inlet pipe is arranged above the other end of the coal conveying pipe 1, the axis of the coal inlet pipe extends along the vertical direction, the coal inlet pipe is communicated with the coal conveying pipe 1, a coal conveying air pipe 7 is arranged at the other end of the coal conveying pipe 1, the coal conveying air pipe 7 is communicated with the coal conveying pipe 1, a coal feeding reinforcing box 4 is arranged below the coal inlet pipe, the coal feeding reinforcing box 4 is fixedly connected to the outer side wall of the coal conveying pipe 1, the coal feeding reinforcing box 4 is arranged corresponding to the coal outlet of the coal inlet pipe, and high-, the pipe clamp 2 is arranged between the coal conveying pipe 1 and the water-cooled wall 11, one end of the pipe clamp 2 is fixedly connected with the water-cooled wall 11, and the clamping end of the pipe clamp 2 is clamped on the coal conveying pipe 1.
In the embodiment, a coal feeding reinforcing box is added on the coal feeding device of the circulating fluidized bed boiler corresponding to the coal drop point of the coal conveying pipe, high-strength wear-resistant casting materials are filled in the coal feeding reinforcing box, so that the rigidity of the position can be enhanced, the deformation of the position can be reduced, and after the running time is long, even if the original coal dropping pipe is seriously abraded and even is abraded and leaked, the high-strength abrasion-resistant castable at the position also has very strong abrasion resistance, the utility model can enhance the intensity of the impact abrasion point of the coal dropping pipe in the coal feeding device, completely solve the problems of unsmooth coal feeding of the boiler and even furnace shutdown caused by the damage of the coal conveying pipe in the coal feeding device, prolong the service life of the coal feeding device, reduce the maintenance times of the coal feeding device, save the cost and simultaneously ensure the long-term safe and stable operation of the boiler;
the coal conveying air pipe 7 has the effects that coal conveying air is introduced through the coal conveying air pipe 7, the downward coal particles are swept and moved downwards together, and the impact force of the falling coal particles on the coal conveying pipe is reduced by the coal conveying air;
the coal conveying pipe sealing box 9 is welded on the outer side wall of the water-cooled wall 11 and is used for ensuring the sealing property between the coal conveying pipe 1 and the water-cooled wall 11 and avoiding the leakage of coal powder;
the coal feeding reinforcing box 4 is matched with the outer wall of the coal conveying pipe 1, the contact surface of the coal feeding reinforcing box 4 and the coal conveying pipe 1 is an arc-shaped surface, and the central angle corresponding to the arc-shaped surface is 150 degrees.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 1, which further defines the coal inlet pipe according to the first embodiment, and in the present embodiment, a metal bellows expansion joint 3 is provided at the coal inlet of the coal inlet pipe, and one end of the metal bellows expansion joint 3 is provided to communicate with the coal inlet of the coal inlet pipe. Other components and connection modes are the same as those of the first embodiment.
In the embodiment, the metal corrugated pipe expansion joint 3 can effectively expand along with heat, so that blockage caused by falling of coal materials is avoided, and meanwhile, the metal corrugated pipe expansion joint 3 absorbs expansion amount to prevent cracking between the coal conveying pipe 1 and the water wall 11 caused by inconsistent expansion
The third concrete implementation mode: the present embodiment will be described with reference to fig. 1, and the present embodiment is further limited to the coal feeder according to the second embodiment, and in the present embodiment, the coal feeder further includes a fixed steel plate 10, the fixed steel plate 10 is disposed between the coal conveying pipe 1 and the water wall 11, one end of the fixed steel plate 10 is fixedly connected to the water wall 11, and the other end of the fixed steel plate 10 is fixedly connected to the outer wall of the coal conveying pipe 1. The other components and the connection mode are the same as those of the second embodiment.
In the embodiment, the fixed steel plate 10 and the pipe clamp 2 are used for fixedly connecting the coal conveying pipe and the water-cooled wall together by welding, so that the expansion of the hearth and the coal feeding device is consistent.
The fourth concrete implementation mode: referring to fig. 1, this embodiment is described, and the present embodiment further defines the coal feeding apparatus according to the third embodiment, and in this embodiment, the coal feeding apparatus further includes a coal-feeding air sealing box 6 and a coal-feeding air duct 8, the coal-feeding air duct 8 is disposed at a joint between the coal conveying pipe 1 and the water-cooled wall 11, one end of the coal-feeding air duct 8 is disposed in communication with the coal conveying pipe 1, the coal-feeding air sealing box 6 is disposed at a joint between the coal-feeding air duct 8 and the coal conveying pipe 1, and the coal-feeding air sealing box 6 is welded to the water-cooled wall 11. Other components and connection modes are the same as those of the third embodiment.
In this embodiment, the coal feeding wind enters through the coal feeding wind pipe 8, and uniformly feeds coal particles into the hearth, and the coal feeding wind sealing box 6 is welded on the outer wall of the water-cooled wall 11, so that the sealing effect is achieved, and the coal particles blown by the coal feeding wind are prevented from leaking.
The fifth concrete implementation mode: the present embodiment will be described with reference to fig. 1, and the present embodiment further defines the coal feed duct 8 according to the third embodiment, and in the present embodiment, the axis of the coal feed duct 8 extends in the horizontal direction. The other components and the connection mode are the same as those of the fourth embodiment.
In the embodiment, the coal-feeding air pipe 8 is horizontally arranged, so that the coal-feeding air can be ensured to be directly blown into the hearth, and the accuracy and the uniformity of blowing in are ensured.
The sixth specific implementation mode: the present embodiment will be described with reference to fig. 1, and the present embodiment is further limited to the coal conveying pipe 1 according to the first embodiment, and in the present embodiment, the axis of the coal conveying pipe 1 is inclined at an angle of 30 to 60 ° with respect to the waterwall 11. The other components and the connection mode are the same as the fifth embodiment mode.
In this embodiment, the inclination angle between the coal conveying pipe 1 and the water wall 11 ensures that the coal can smoothly flow into the furnace chamber through the coal conveying pipe 1.
The seventh embodiment: referring to fig. 1, the present embodiment is described, and the present embodiment further defines the pipe clamp 2 according to the sixth embodiment, in the present embodiment, the clamping end of the pipe clamp 2 is disposed in cooperation with the coal conveying pipe 1, two sets of connecting holes are disposed on the clamping end of the pipe clamp 2, the two sets of connecting holes are symmetrically disposed with respect to the axis of the coal conveying pipe 1, and one connecting assembly is disposed in each set of connecting holes. Other components and connection modes are the same as those of the sixth embodiment.
In this embodiment, the one end of pipe clamp 2 is consolidated coal conveying pipe 1 through coupling assembling, compares in the rigid coupling, can absorb certain inflation volume, guarantees the steady operation of device.
The specific implementation mode is eight: the present embodiment will be described with reference to fig. 1, and the present embodiment is a coupling assembly according to a sixth embodiment, which is a bolt-and-nut mechanism. The other components and the connection mode are the same as those of the seventh embodiment.
Principle of operation
When the utility model is used, firstly, one end of the coal conveying pipe 1 is ensured to be communicated with the water-cooled wall 11, and the coal material can enter the hearth through the end of the coal conveying pipe 1, the coal is in the coal bunker, the coal passes through the coal feeder, then naturally falls into the coal conveying pipe 1 of the boiler through the metal corrugated pipe expansion joint 3 by means of gravity, and impacts on the inner wall of the coal conveying pipe 1, the coal feeding reinforcing box 4 is arranged on the outer side wall of the impact point, the high-strength wear-resistant pouring material 5 is filled in the coal feeding reinforcing box 4, thereby avoiding the coal material from being impacted for multiple times, influencing the use of the device, the coal conveying wind enters through the coal conveying wind pipe 7, playing the role of sealing the coal powder, simultaneously blowing down coal particles together, the coal conveying wind reduces the impact force of the coal particles falling to the coal conveying pipe, the coal wind enters through the coal sowing wind pipe 8, the coal particles are uniformly scattered into the hearth, the pipe clamp 2 and the fixed steel plate 10 fixedly connect the coal conveying pipe and the water-cooled wall in a welding mode, so that the expansion of a hearth and a coal feeding device is consistent, the expansion amount is absorbed by the metal corrugated pipe expansion joint 3, cracking between the coal conveying pipe 1 and the water-cooled wall 11 due to inconsistent expansion is prevented, the coal conveying pipe sealing box 9 is welded to the water-cooled wall, the surface of the coal conveying pipe 1 is covered after the lower port of the coal conveying pipe 1 is welded to the water-cooled wall, light castable is filled in the coal conveying pipe, a double sealing effect is achieved, and the coal air sealing box 6 is used for sealing the joint of the coal conveying pipe 1 and the coal conveying pipe 7.
Claims (9)
1. A coal feeding device of a circulating fluidized bed boiler is arranged on the outer side of a water-cooled wall (11) and is communicated with the water-cooled wall (11), and is characterized by comprising a coal conveying pipe (1), a pipe clamp (2), a coal feeding reinforcing box (4), a high-strength wear-resistant castable (5), a coal conveying air pipe (7) and a coal conveying pipe sealing box (9);
the coal conveying pipe (1) is arranged on the outer side of the water-cooled wall (11), the axis of the coal conveying pipe (1) is obliquely arranged relative to the water-cooled wall (11), one end of the coal conveying pipe (1) is communicated with the water-cooled wall (11), a coal conveying pipe sealing box (9) is arranged at the communication position of the coal conveying pipe (1) and the water-cooled wall (11), the coal conveying pipe sealing box (9) is arranged on the outer side of the water-cooled wall (11), the coal conveying pipe sealing box (9) is fixedly connected with the water-cooled wall (11), a coal inlet pipe is arranged above the other end of the coal conveying pipe (1), the axis of the coal inlet pipe extends along the vertical direction, the coal inlet pipe is communicated with the coal conveying pipe (1), the coal conveying pipe (7) is arranged at the other end of the coal conveying pipe (1), the coal conveying pipe (7) is communicated with the coal conveying pipe (1), a coal feeding reinforcing box (4) is arranged below the coal feeding reinforcing box (4) and fixedly connected on the outer side wall of the coal conveying pipe (1), the coal feeding reinforcing box (4) is arranged corresponding to a coal outlet of the coal feeding pipe, the high-strength wear-resistant casting material (5) is filled in the coal feeding reinforcing box (4), the pipe clamp (2) is arranged between the coal conveying pipe (1) and the water cooling wall (11), one end of the pipe clamp (2) is fixedly connected with the water cooling wall (11), and the clamping end of the pipe clamp (2) is clamped on the coal conveying pipe (1).
2. A circulating fluidized bed boiler coal feeding apparatus as claimed in claim 1, wherein: and a coal inlet of the coal inlet pipe is provided with a metal corrugated pipe expansion joint (3), and one end of the metal corrugated pipe expansion joint (3) is communicated with the coal inlet of the coal inlet pipe.
3. A circulating fluidized bed boiler coal feeding apparatus as claimed in claim 2, wherein: the coal feeding device further comprises a fixed steel plate (10), the fixed steel plate (10) is arranged between the coal conveying pipe (1) and the water-cooled wall (11), one end of the fixed steel plate (10) is fixedly connected with the water-cooled wall (11), and the other end of the fixed steel plate (10) is fixedly connected with the outer wall of the coal conveying pipe (1).
4. A circulating fluidized bed boiler coal feeding apparatus as claimed in claim 2, wherein: the coal feeding device further comprises a coal feeding air sealing box (6) and a coal feeding air pipe (8), the coal feeding air pipe (8) is arranged at the joint of the coal conveying pipe (1) and the water cooling wall (11), one end of the coal feeding air pipe (8) is communicated with the coal conveying pipe (1), the coal feeding air pipe (8) is provided with the coal feeding air sealing box (6) at the joint of the coal conveying pipe (1), and the coal feeding air sealing box (6) is welded on the water cooling wall (11).
5. The circulating fluidized bed boiler coal feeding apparatus of claim 4, wherein: the axis of the coal-feeding air pipe (8) extends along the horizontal direction.
6. The circulating fluidized bed boiler coal feeding apparatus of claim 4, wherein: the inclination angle of the axis of the coal conveying pipe (1) relative to the vertical direction is 45-60 degrees.
7. A circulating fluidized bed boiler coal feeding apparatus as claimed in claim 1, wherein: the clamping end of the pipe clamp (2) is matched with the coal conveying pipe (1), two groups of connecting holes are formed in the clamping end of the pipe clamp (2), the two groups of connecting holes are symmetrically arranged relative to the axis of the coal conveying pipe (1), and a connecting assembly is arranged in each group of connecting holes.
8. The circulating fluidized bed boiler coal feeding apparatus of claim 7, wherein the connection assembly is a bolt and nut mechanism.
9. The coal feeding device of the circulating fluidized bed boiler according to claim 1, wherein the coal feeding reinforcing box (4) is arranged in cooperation with the outer wall of the coal conveying pipe (1), the contact surface of the coal feeding reinforcing box (4) and the coal conveying pipe (1) is an arc-shaped surface, and the central angle corresponding to the arc-shaped surface is 150 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021765740.1U CN213146546U (en) | 2020-08-21 | 2020-08-21 | Coal feeding device of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021765740.1U CN213146546U (en) | 2020-08-21 | 2020-08-21 | Coal feeding device of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213146546U true CN213146546U (en) | 2021-05-07 |
Family
ID=75740173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021765740.1U Active CN213146546U (en) | 2020-08-21 | 2020-08-21 | Coal feeding device of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213146546U (en) |
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2020
- 2020-08-21 CN CN202021765740.1U patent/CN213146546U/en active Active
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