Auxiliary device for removing ash at slag falling opening of circulating fluidized bed boiler

Abstract

The utility model relates to the technical field of circulating fluidized bed boilers, in particular to an auxiliary device for cleaning ash at a slag falling opening of a circulating fluidized bed boiler, which is convenient for cleaning ash in a slag discharging pipe in the boiler and comprises an air cylinder and an ash cleaning piece, the air cylinder is arranged at the lower end of the boiler, one side of the ash cleaning piece is slidably arranged in the slag discharging pipe, and the other side of the ash cleaning piece is connected with a piston rod of the air cylinder. A sliding groove is formed in the pipe wall of the slag discharging pipe in a penetrating mode, the middle of the ash removing piece is slidably connected with the sliding groove, and a foldable protective cover is arranged in the sliding groove. The slag poking rod can dredge the slag discharging pipe, the air cylinder drives the slag poking rod to move up and down, manpower is saved, the spiral blade is arranged on the outer side of the slag poking rod, the slag poking range of the ash removing piece is enlarged, the cleaning efficiency is improved, ash can be effectively removed in an auxiliary mode, and the slag discharging pipe is prevented from being blocked. And the arranged protective cover can prevent ash residues from leaking out of the side wall of the slag discharging pipe, the protective effect on the sliding groove is achieved, the ash residues and dust with the high temperature are prevented from overflowing, and the influence on the environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating fluidized bed boilers, in particular to an auxiliary device for removing ash and slag from a slag outlet of a circulating fluidized bed boiler. Background Art

[0002] In a circulating fluidized bed boiler, the air distribution plate is installed at the bottom of the furnace and is a key component to support the bed material, distribute air evenly, and ensure the normal fluidization state. A large amount of bed material is accumulated in the furnace of the circulating fluidized bed boiler. The primary air is evenly distributed through the air distribution plate to drive the bed material and fuel in the furnace to flow, making it in a fluidized state. A slag discharge pipe is set at the slag outlet below the air distribution plate, and the large particle impurities left over from the combustion need to be discharged from the slag outlet at the bottom of the air distribution plate through the slag discharge pipe.

[0003] Research and application of operation and maintenance technology for auxiliary systems of central heating boilers. During the two years of boiler operation, the desulfurization and denitrification system was put into use. In addition to coal, limestone and urea were also put into the furnace. The substances were mixed in a confined space and easily crystallized, which eventually led to the blockage of the slag outlet of the boiler system slag storage. The ash and slag could not be transported away in time, affecting the normal operation of the boiler. At present, the method to solve the blockage of the slag outlet usually relies on manpower to use rods to shovel and poke in the slag discharge pipe. During the shoveling and poking process, a large amount of dust will be exposed to the air, which also has a bad impact on the environment. At the same time, the dredging range of the rods is generally limited, and it is easy to leave dead corners in the slag discharge pipe that cannot be dredged, and the cleaning efficiency is low. Utility Model Content

[0004] The main purpose of the utility model is to provide an auxiliary device for removing ash and slag from a slag outlet of a circulating fluidized bed boiler, which can effectively solve the above-mentioned problem.

[0005] The utility model provides the following technical solution: an auxiliary device for removing ash from the slag outlet of a circulating fluidized bed boiler, which is convenient for cleaning the ash in the slag discharge pipe of the boiler, and comprises a cylinder and a cleaning piece. The cylinder is arranged at the lower end of the boiler, one side of the cleaning piece is slidably arranged in the slag discharge pipe, and the other side is connected to the piston rod of the cylinder, a slide groove is penetrated through the wall of the slag discharge pipe, and the slide groove is arranged in a direction parallel to the axis of the slag discharge pipe, the middle part of the cleaning piece is slidably connected to the slide groove, and a foldable protective cover is arranged in the slide groove.

[0006] Furthermore, the cleaning component includes a slag-poking rod arranged in a direction parallel to the axis of the slag discharge pipe, two slag-poking rods are arranged at intervals, and spiral blades are sleeved on the outer sides of the two slag-poking rods.

[0007] Furthermore, the inner side of the spiral blade is fixedly connected to the outer walls of the two slag-poking rods at the same time, and the outer edge of the spiral blade is in contact with the inner wall of the slag discharge pipe.

[0008] Furthermore, a connecting rod is provided in the middle of the cleaning member, one end of the connecting rod close to the spiral blade is fixedly connected to the two slag-poking rods at the same time, and the other end is fixedly provided with a connecting block, and the connecting block is fixedly connected to the end of the piston rod of the cylinder.

[0009] Furthermore, the connecting rod is inserted into the slide groove and is slidably connected to the slide groove, the protective cover is provided with two sections, the connecting rod is located between the two sections of the protective cover, and the connecting rod is fixedly connected to the protective cover.

[0010] Furthermore, a fixing plate is fixedly arranged on the inner wall of the lower end of the boiler, and the cylinder body of the cylinder is fixedly arranged on the lower surface of the fixing plate.

[0011] Furthermore, the protective cover is in the shape of an elongated strip, and two sides of the protective cover are in contact with the inner walls of two sides of the slide groove.

[0012] Furthermore, the upper end of a protective cover located above the connecting rod is fitted with the inner wall of the upper end of the slide groove, and the lower end is fitted with the upper surface of the connecting rod. The upper end of a protective cover located below the connecting rod is fitted with the lower surface of the connecting rod, and the lower end is fitted with the inner wall of the lower end of the slide groove.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. In the utility model, a slag-poking rod is provided to dredge the slag discharge pipe. The slag-poking rod is driven up and down by a cylinder, so that the boiler can be cleaned in real time when it is working, avoiding manual slag poking and saving manpower. A spiral blade is provided on the outer side of the slag-poking rod, so that a large area of ​​the pipe wall can be scraped and cleaned, thereby expanding the slag-poking range of the cleaning part, improving the cleaning efficiency, and effectively assisting in removing ash and slag to avoid blockage of the slag discharge pipe.

[0015] 2. In the utility model, the protective cover can prevent ash from leaking out from the side wall of the slag discharge pipe, and also protect the chute, avoiding accidents caused by the overflow of high-temperature ash and dust, and reducing the impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the disassembled structure of the dust cleaning component of the utility model;

[0019] Figure 3 It is a schematic diagram of the half-section structure of the slag discharge pipe of the utility model.

[0020] 1. Boiler; 11. Air hood; 12. Fixed plate; 13. Air distribution plate; 2. Slag discharge pipe; 21. Slide; 22. Protective cover; 3. Cylinder; 4. Soot cleaning parts; 41. Slag poking rod; 42. Spiral blade; 43. Connecting rod; 44. Connecting block. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] Specific implementation examples Figure 1-3 As shown: an auxiliary device for removing ash from the slag outlet of a circulating fluidized bed boiler, wherein an air distribution plate 13 is arranged inside the boiler 1, and a plurality of air hoods 11 are arranged in a circular array on the air distribution plate 13, a slag outlet is arranged at the center of the air distribution plate 13, and the upper end of the slag discharge pipe 2 is connected with the slag outlet, so as to facilitate cleaning the ash in the slag discharge pipe 2 of the boiler 1, comprising a cylinder 3 and a cleaning member 4, the cylinder 3 is arranged at the lower end of the boiler 1, one side of the cleaning member 4 is slidably arranged in the slag discharge pipe 2, and the other side is connected to the piston rod of the cylinder 3, a slide groove 21 is opened through the wall of the slag discharge pipe 2, the slide groove 21 is arranged in a direction parallel to the axis of the slag discharge pipe 2, the middle part of the cleaning member 4 is slidably connected with the slide groove 21, and a foldable protective cover 22 is arranged in the slide groove 21.

[0024] Furthermore, the cleaning component 4 includes a slag prying rod 41 arranged in a direction parallel to the axis of the slag discharge pipe 2, and two slag prying rods 41 are arranged at intervals. The outer sides of the two slag prying rods 41 are sleeved with spiral blades 42, and the inner sides of the spiral blades 42 are fixedly connected to the outer walls of the two slag prying rods 41 at the same time. The outer edges of the spiral blades 42 are in contact with the inner wall of the slag discharge pipe 2. The arrangement of the spiral blades 42 can facilitate the passage of ash and avoid the ash being blocked above the slag prying rods 41.

[0025] Furthermore, a connecting rod 43 is provided in the middle of the cleaning component 4, and one end of the connecting rod 43 close to the spiral blade 42 is fixedly connected to the two slag prying rods 41 at the same time, and a connecting block 44 is fixedly provided on the other end, and the connecting block 44 is fixedly connected to the piston rod end of the cylinder 3. The set slag prying rod 41 can clear the slag discharge pipe 2, and the slag prying rod 41 is driven up and down by the cylinder 3 to avoid manual slag prying and save manpower. The spiral blade 42 is provided on the outside of the slag prying rod 41 to expand the slag prying range of the cleaning component 4, improve the cleaning efficiency, and can effectively assist in removing ash and slag to avoid clogging of the slag discharge pipe 2.

[0026] Furthermore, the connecting rod 43 is passed through the slide groove 21 and is slidably connected to the slide groove 21. The protective cover 22 is provided with two sections. The connecting rod 43 is located between the two sections of the protective cover 22. The connecting rod 43 is fixedly connected to the protective cover 22. The provided protective cover 22 can prevent ash from leaking from the side wall of the slag discharge pipe 2, and also plays a protective role on the slide groove 21, avoiding accidents caused by overflow of ash and dust with high temperature, and reducing the impact on the environment.

[0027] Furthermore, a fixing plate 12 is fixedly arranged on the inner wall of the lower end of the boiler 1 , and the cylinder body of the cylinder 3 is fixedly arranged on the lower surface of the fixing plate 12 .

[0028] Furthermore, the protective cover 22 is in the shape of an elongated strip. The upper end of a section of the protective cover 22 located above the connecting rod 43 is fitted with the inner wall of the upper end of the slide groove 21, and the lower end is fitted with the upper surface of the connecting rod 43. The upper end of a section of the protective cover 22 located below the connecting rod 43 is fitted with the lower surface of the connecting rod 43, and the lower end is fitted with the inner wall of the lower end of the slide groove 21. The two sides of the protective cover 22 are fitted with the inner walls of the two sides of the slide groove 21. The protective cover 22 can be extended or folded accordingly with the movement of the connecting rod 43.

[0029] When an auxiliary device for removing ash from the slag outlet of a circulating fluidized bed boiler is in use, when there is material mixing in the slag discharge pipe 2 to produce crystals that need to be cleaned or blocked, the cylinder 3 is started, and the piston rod of the cylinder 3 moves, driving the connecting block 44 to move, and the connecting block 44 drives the connecting rod 43 to move, and the connecting rod 43 slides in the slide groove 21, one section of the protective cover 22 is folded, and the other section of the protective cover 22 is correspondingly extended, and the connecting rod 43 drives the slag poking rod 41 to move up and down in the slag discharge pipe 2, and the slag poking rod 41 can poke the blocked ash and unclog the slag discharge pipe 2, and the spiral blade 42 can shovel off the smaller crystals on the inner wall of the slag discharge pipe 2, and the shoveled ash passes through the middle of the spiral blade 42 and is discharged from the lower end of the slag discharge pipe 2. When the device is in use, the slag poking rod 41 is set to clear the slag discharge pipe 2. The slag poking rod 41 is driven up and down by the cylinder 3, and can be cleaned in real time when the boiler 1 is working, avoiding manual slag poking and saving manpower. A spiral blade 42 is set on the outside of the slag poking rod 41, which can scrape and clean the pipe wall in a large range, expand the slag poking range of the cleaning part 4, improve the cleaning efficiency, and can effectively assist in removing ash and avoid clogging of the slag discharge pipe 2. The protective cover 22 can prevent ash and slag from leaking out of the side wall of the slag discharge pipe 2, and also protect the chute 21 to avoid accidents caused by overflow of ash and dust with high temperature, while also reducing the impact on the environment.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[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. An auxiliary device for removing ash from a slag outlet of a circulating fluidized bed boiler, which is convenient for cleaning ash in a slag discharge pipe (2) in a boiler (1), characterized in that: The invention comprises a cylinder (3) and a cleaning member (4), wherein the cylinder (3) is arranged at the lower end of the boiler (1), one side of the cleaning member (4) is slidably arranged in a slag discharge pipe (2), and the other side is connected to the piston rod of the cylinder (3), a slide groove (21) is penetrated through the wall of the slag discharge pipe (2), and the slide groove (21) is arranged in a direction parallel to the axis of the slag discharge pipe (2), the middle part of the cleaning member (4) is slidably connected to the slide groove (21), and a foldable protective cover (22) is arranged in the slide groove (21).

2. The ash and slag removal auxiliary device for a circulating fluidized bed boiler according to claim 1, characterized in that: The cleaning member (4) comprises a slag-poking rod (41) arranged in a direction parallel to the axis of the slag discharge pipe (2), two slag-poking rods (41) are arranged at intervals, and spiral blades (42) are sleeved on the outer sides of the two slag-poking rods (41).

3. The ash and slag removal auxiliary device for a circulating fluidized bed boiler according to claim 2, characterized in that: The inner side of the spiral blade (42) is fixedly connected to the outer walls of the two slag-poking rods (41) at the same time, and the outer edge of the spiral blade (42) is in contact with the inner wall of the slag discharge pipe (2).

4. The ash and slag removal auxiliary device for a circulating fluidized bed boiler according to claim 3 is characterized in that: A connecting rod (43) is provided in the middle of the cleaning member (4); one end of the connecting rod (43) close to the spiral blade (42) is fixedly connected to the two slag-poking rods (41) at the same time, and a connecting block (44) is fixedly provided at the other end; and the connecting block (44) is fixedly connected to the end of the piston rod of the cylinder (3).

5. The ash and slag removal auxiliary device for a circulating fluidized bed boiler according to claim 4, characterized in that: The connecting rod (43) is inserted into the slide groove (21) and is slidably connected to the slide groove (21); the protective cover (22) is provided with two sections; the connecting rod (43) is located between the two sections of the protective cover (22); and the connecting rod (43) is fixedly connected to the protective cover (22).

6. The ash and slag removal auxiliary device for a circulating fluidized bed boiler according to claim 1, characterized in that: A fixing plate (12) is fixedly arranged on the inner wall of the lower end of the boiler (1), and the cylinder body of the cylinder (3) is fixedly arranged on the lower surface of the fixing plate (12).

7. The ash and slag removal auxiliary device for a circulating fluidized bed boiler according to claim 1, characterized in that: The protective cover (22) is in the shape of an elongated strip, and two sides of the protective cover (22) are in contact with the inner walls of two sides of the slide groove (21).

8. The ash and slag removal auxiliary device for a circulating fluidized bed boiler according to claim 5, characterized in that: The upper end of a section of the protective cover (22) located above the connecting rod (43) is in contact with the inner wall of the upper end of the slide groove (21), and the lower end is in contact with the upper surface of the connecting rod (43); the upper end of a section of the protective cover (22) located below the connecting rod (43) is in contact with the lower surface of the connecting rod (43), and the lower end is in contact with the inner wall of the lower end of the slide groove (21).

Images