Warp and weft anti-abrasion device of boiler

Abstract

The utility model belongs to the field of circulating fluidized bed boilers, and particularly relates to a boiler longitude and latitude anti-abrasion device which is assembled on a boiler body, a hearth is arranged in the boiler body, a plurality of drainage blocks are continuously and fixedly assembled on the inner wall of the hearth, and each drainage block is provided with an inclined downward face and an inclined upward face. According to the warp and weft anti-abrasion device of the boiler, through cooperation of the drainage blocks and the anti-abrasion pieces, the problems that large particles of different height parts of an existing hearth fall down along the side wall of the hearth, internal circulation of materials is formed, and the heat dissipation efficiency is improved are solved. And the materials falling close to the wall form shearing collision on the water cooling wall tube of the boiler, so that the water cooling wall tube is seriously abraded, and a heating surface frequently leaks, so that a unit stops running.

Description

Technical Field

[0001] The utility model relates to the field of circulating fluidized bed boilers, in particular to a boiler warp and weft anti-wear device. Background Art

[0002] The circulating fluidized bed boiler uses the most industrialized clean coal combustion technology. The circulating fluidized bed boiler uses fluidized combustion. The main structure includes two parts: the combustion chamber (including the dense phase area and the dilute phase area) and the circulating furnace (including the high-temperature gas-solid separator and the return system). The biggest difference from the bubbling fluidized bed combustion technology is the high operating wind speed, which strengthens the heterogeneous reaction process such as combustion and desulfurization. The circulating fluidized bed boiler has well solved the basic problems such as thermodynamics, mechanics, and materials science, as well as engineering problems such as expansion, wear, and overheating, and has become an advanced technology for the energy utilization of difficult-to-burn solid fuels (such as coal gangue, oil shale, urban garbage, sludge and other wastes).

[0003] However, the existing circulating fluidized bed boiler still has the following problems during use:

[0004] The bed material composed of coal ash, unreacted limestone, limestone desulfurization reaction products, etc. in the existing circulating fluidized bed boiler is in a fluidized state under the action of the primary fan. The coal particles, bed material and limestone are entrained by the flue gas and move upward in the furnace. Some large particles at different heights in the furnace will fall along the side wall of the furnace to form an internal circulation of the material. These materials falling against the wall will form shear collisions with the water-cooled wall tubes of the boiler, causing serious wear of the water-cooled wall tubes, resulting in frequent leakage of the heating surface and causing the unit to shut down. Therefore, it is very necessary to use the boiler warp and weft anti-wear device in the existing circulating fluidized bed boiler field. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology, the bed material composed of coal ash, unreacted limestone, limestone desulfurization reaction products, etc. in the existing circulating fluidized bed boiler is in a fluidized state under the action of the primary fan sent in, and the coal particles, bed material and limestone are entrained by the flue gas and move upward in the furnace. Some large particles at different heights in the furnace will fall along the side wall of the furnace to form an internal circulation of the material. These materials falling against the wall will form a shear collision with the water-cooled wall tubes of the boiler, causing serious wear of the water-cooled wall tubes, resulting in frequent leakage of the heating surface and causing the unit to stop operating. The utility model proposes a boiler warp and weft anti-wear device.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a boiler warp and weft anti-wear device is assembled on a boiler body, a furnace is arranged inside the boiler body, a plurality of drainage blocks are continuously fixedly assembled on the inner wall of the furnace, the drainage blocks are triangular in shape, the drainage blocks are fixedly assembled, the drainage blocks are arranged with an inclined downward direction, the drainage blocks are arranged with an inclined upward direction, and the inclined downward direction and the inclined upward direction of the drainage blocks are both facing outward, and the inclined downward direction and the inclined upward direction of the drainage blocks are fixedly assembled with anti-wear sheets, a plurality of water-cooled wall tubes are fixedly assembled on the drainage blocks, and a through-opening is penetrated through the drainage blocks.

[0007] Preferably, a connecting block is fixedly mounted on the boiler body, a boiler drum is fixedly mounted on one end of the connecting block, the interior of the boiler drum is connected to the connecting block, and the connecting block is connected to the water-cooled wall tube, a downcomer is fixedly mounted on the boiler drum, and the interior of the downcomer is connected to the interior of the boiler drum.

[0008] Preferably, a pneumatic feeder is fixedly mounted on the boiler body, a fuel funnel is fixedly mounted on the pneumatic feeder, and a limestone funnel is fixedly mounted on the pneumatic feeder.

[0009] Preferably, a mounting block is fixedly mounted on the boiler body, the interior of the mounting block is connected to the through-port, a cyclone separator is fixedly mounted on one end of the mounting block, the interior of the cyclone separator is connected to the mounting block, an mounting block is fixedly mounted on the cyclone separator, an economizer is fixedly mounted on one end of the mounting block, the interior of the economizer is connected to the interior of the cyclone separator through the interior of the mounting block, a conveying channel is fixedly mounted on the economizer, and an air preheater is fixedly mounted on the inner wall of the economizer.

[0010] Preferably, a primary fan is fixedly mounted on the conveying channel, a connecting pipe is fixedly mounted on the primary fan, the connecting pipe passes through the economizer, and the connecting pipe is fixedly mounted on the pneumatic feeder.

[0011] Preferably, a superheater is fixedly mounted on the inner wall of the economizer, a water supply pipe is fixedly mounted on the boiler drum, and a steam exhaust pipe is fixedly mounted on the boiler drum, and both the water supply pipe and the steam exhaust pipe pass through the superheater on the economizer.

[0012] The utility model is beneficial in that:

[0013] The utility model puts fuel into the fuel hopper, puts limestone into the limestone hopper, starts the primary fan, and the wind enters the pneumatic feeder through the connecting pipe. Under the action of the pneumatic feeder, the fuel and limestone enter the furnace of the boiler main body, and the primary wind generated by the primary fan enters the furnace of the boiler main body, so that the bed material composed of the fuel and limestone is in a fluidized state under the action of the primary wind sent in, and the fuel and limestone are entrained in the furnace by the flue gas and move upward, and large particles at different heights in the furnace will fall along the side wall of the furnace to form an internal circulation of the material, and the drainage block installed on the water-cooled wall tube is fixedly equipped with anti-wear sheets on the inclined downward and inclined upward sides of the drainage block. The anti-wear sheets can make the particles hit the anti-wear sheets when rising and falling, reduce the movement speed, greatly reduce the impact on the water-cooled wall tube, and will not affect the performance of the water-cooled wall tube, thereby extending the service life of the water-cooled wall tube and increasing the stability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the structure of a circulating fluidized bed boiler of the utility model;

[0016] Figure 2 It is a schematic cross-sectional structure diagram of a circulating fluidized bed boiler of the utility model;

[0017] Figure 3 It is a schematic cross-sectional structure diagram of a circulating fluidized bed boiler of the utility model;

[0018] Figure 4 It is a schematic diagram of the assembly structure of the water-cooled wall tube and the anti-wear mechanism of the utility model.

[0019] In the figure:

[0020] 10. Boiler body; 11. Boiler drum; 12. Downcomer; 13. Pneumatic feeder;

[0021] 20. Fuel hopper; 21. Limestone hopper; 22. Cyclone separator; 23. Economizer;

[0022] 30. Primary fan; 31. Connecting pipe; 32. Water supply pipe; 33. Steam discharge pipe;

[0023] 40. furnace; 41. drainage block; 42. anti-wear sheet; 43. water-cooled wall tube;

[0024] 50. air heat exchanger; 51. conveying channel; 52. superheater; 53. connecting block;

[0025] 60. Mounting block; 61. Assembly block; 62. Through-hole. DETAILED DESCRIPTION

[0026] 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 of 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.

[0027] The following is combined with Figure 1 —4 further details of this application,

[0028] The embodiment of the present application discloses a boiler warp and weft anti-wear device. Figure 1 and Figure 2 as well as Figure 4 The boiler warp and weft anti-wear device is mounted on the boiler body 10. A furnace 40 is arranged inside the boiler body 10. A plurality of drainage blocks 41 are continuously fixedly mounted on the inner wall of the furnace 40. The drainage blocks 41 are triangular in shape. The drainage blocks 41 are fixedly mounted. The drainage blocks 41 are arranged with inclined downwards, and inclined upwards, and the inclined downwards and inclined upwards of the drainage blocks 41 are both facing outwards. The inclined downwards and inclined upwards of the drainage blocks 41 are fixedly mounted with anti-wear sheets 42. The drainage blocks 41 are fixed with the anti-wear sheets 42. A plurality of water-cooled wall tubes 43 are fixedly mounted, a through opening 62 is penetrated on the drainage block 41, the drainage block 41 is added to the water-cooled wall tube 43, and anti-wear sheets 42 are fixedly mounted on the inclined downward and inclined upward sides of the drainage block 41. The anti-wear sheets 42 can make particles hit the anti-wear sheets 42 when rising and falling, thereby reducing the movement speed, greatly reducing the impact on the water-cooled wall tube 43, and will not affect the performance of the water-cooled wall tube 43, thereby extending the service life of the water-cooled wall tube 43 and increasing the stability of equipment operation.

[0029] Reference Figure 1 - Figure 3The boiler body 10 is fixedly equipped with a connecting block 53, one end of which is fixedly equipped with a drum 11, the interior of the drum 11 is connected to the connecting block 53, and the connecting block 53 is connected to the water-cooled wall tube 43, the drum 11 is fixedly equipped with a downcomer 12 connected to the interior of the drum 11, the boiler body 10 is fixedly equipped with a pneumatic feeder 13, the pneumatic feeder 13 is fixedly equipped with a fuel funnel 20, the pneumatic feeder 13 is fixedly equipped with a limestone funnel 21, and the boiler body 10 is fixedly equipped with The mounting block 60 is connected to the through hole 62, and one end of the mounting block 60 is fixedly equipped with a cyclone separator 22 connected to the inside of the mounting block 60. The mounting block 61 is fixedly equipped on the cyclone separator 22, and one end of the mounting block 61 is fixedly equipped with an economizer 23. The inside of the economizer 23 is connected to the inside of the cyclone separator 22 through the inside of the mounting block 61. The economizer 23 is fixedly equipped with a conveying channel 51, and the inner wall of the economizer 23 is fixedly equipped with an air heat exchanger 50. The conveying channel 51 is fixedly equipped with a The secondary fan 30 is fixedly equipped with a connecting pipe 31 on the primary fan 30, and the connecting pipe 31 penetrates the economizer 23, and the connecting pipe 31 is fixedly equipped with the pneumatic feeder 13. The inner wall of the economizer 23 is fixedly equipped with a superheater 52. The boiler drum 11 is fixedly equipped with a water supply pipe 32, and the boiler drum 11 is fixedly equipped with a steam exhaust pipe 33. The water supply pipe 32 and the steam exhaust pipe 33 both penetrate the superheater 52 on the economizer 23. Fuel is added to the fuel hopper 20, and limestone is added to the limestone hopper 21. The primary fan is started. 30, wind enters the pneumatic feeder 13 through the connecting pipe 31, under the action of the pneumatic feeder 13, the fuel and limestone enter the furnace 40 of the boiler body 10, the primary wind generated by the primary fan 30 enters the furnace 40 of the boiler body 10, so that the bed material composed of fuel and limestone is in a fluidized state under the action of the primary wind, the fuel and limestone are entrained by the flue gas and move upward in the furnace 40, and large particles at different heights of the furnace 40 will fall along the side wall of the furnace 40, forming an internal circulation of the material.

[0030] Working principle: Fuel is added to the fuel hopper 20, limestone is added to the limestone hopper 21, and the primary fan 30 is started. The wind enters the pneumatic feeder 13 through the connecting pipe 31. Under the action of the pneumatic feeder 13, the fuel and limestone enter the furnace 40 of the boiler body 10. The primary wind generated by the primary fan 30 enters the furnace 40 of the boiler body 10, so that the bed material composed of fuel and limestone is in a fluidized state under the action of the primary wind. The fuel and limestone are entrained by the flue gas and move upward in the furnace 40. Large particles at different heights of the chamber 40 will fall along the side walls of the chamber 40 to form an internal circulation of the material. A drainage block 41 is installed on the water-cooled wall tube 43, and anti-wear sheets 42 are fixedly installed on the downward and upward inclined sides of the drainage block 41. The anti-wear sheets 42 can make the particles hit the anti-wear sheets 42 when rising and falling, thereby reducing the movement speed and greatly reducing the impact on the water-cooled wall tube 43 without affecting the performance of the water-cooled wall tube 43, thereby extending the service life of the water-cooled wall tube 43 and increasing the stability of the equipment operation.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A boiler warp and weft anti-wear device, mounted on a boiler body (10), characterized in that: A furnace (40) is arranged inside the boiler body (10), and a plurality of drainage blocks (41) are continuously fixedly mounted on the inner wall of the furnace (40), the drainage blocks (41) are triangular in shape, and are fixedly mounted between the drainage blocks (41), the drainage blocks (41) are each provided with a downwardly inclined portion, the drainage blocks (41) are each provided with an upwardly inclined portion, and the downwardly inclined portion and the upwardly inclined portion of the drainage blocks (41) are both facing outwards, the downwardly inclined portion and the upwardly inclined portion of the drainage blocks (41) are each fixedly mounted with anti-wear sheets (42), a plurality of water-cooled wall tubes (43) are fixedly mounted on the drainage blocks (41), and a through-hole (62) is penetrated through the drainage blocks (41).

2. The boiler warp and weft anti-wear device according to claim 1 is characterized in that: A connecting block (53) is fixedly mounted on the boiler body (10), a boiler drum (11) is fixedly mounted on one end of the connecting block (53), the interior of the boiler drum (11) is communicated with the connecting block (53), and the connecting block (53) is communicated with the water-cooled wall tube (43), a downcomer (12) is fixedly mounted on the boiler drum (11), and the interior of the downcomer (12) is communicated with the interior of the boiler drum (11).

3. The boiler warp and weft anti-wear device according to claim 2 is characterized in that: A pneumatic feeder (13) is fixedly mounted on the boiler body (10), a fuel funnel (20) is fixedly mounted on the pneumatic feeder (13), and a limestone funnel (21) is fixedly mounted on the pneumatic feeder (13).

4. The boiler warp and weft anti-wear device according to claim 3 is characterized by: The boiler body (10) is fixedly mounted with a mounting block (60), the interior of the mounting block (60) is connected to the through-hole (62), one end of the mounting block (60) is fixedly mounted with a cyclone separator (22), the interior of the cyclone separator (22) is connected to the mounting block (60), the cyclone separator (22) is fixedly mounted with a mounting block (61), one end of the mounting block (61) is fixedly mounted with an economizer (23), the interior of the economizer (23) is connected to the interior of the cyclone separator (22) through the interior of the mounting block (61), the economizer (23) is fixedly mounted with a conveying channel (51), and the inner wall of the economizer (23) is fixedly mounted with an air heat exchanger (50).

5. The boiler warp and weft anti-wear device according to claim 4 is characterized in that: A primary fan (30) is fixedly mounted on the conveying passage (51), a connecting pipe (31) is fixedly mounted on the primary fan (30), the connecting pipe (31) passes through the economizer (23), and the connecting pipe (31) is fixedly mounted on the pneumatic feeder (13).

6. The boiler warp and weft anti-wear device according to claim 5 is characterized by: A superheater (52) is fixedly mounted on the inner wall of the economizer (23), a water supply pipe (32) is fixedly mounted on the boiler drum (11), and a steam discharge pipe (33) is fixedly mounted on the boiler drum (11). Both the water supply pipe (32) and the steam discharge pipe (33) pass through the superheater (52) on the economizer (23).

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