Ash conveying device for ash hopper of waste heat boiler
By designing ash conveying device for gravity discharge plates and variable diameter pipes, the boiler ash drop time is extended and the temperature is reduced through air replacement, the serious wear of conveyors in high-temperature environments in the existing technology is solved, and maintenance costs and scald risks are reduced. .
Patent Information
- Application Number
- CN202420174121.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-24
AI Technical Summary
The existing waste heat boiler ash hopper ash conveyor causes serious wear of the screw conveyor shaft and blades under high temperature environments, high maintenance costs and risk of scalding.
Ash conveying device including three gravity discharge plates and a variable diameter tube is designed. Through the combination of inclined plates and external cylinders, the drop time of boiler ash is extended, and the outer air inlet holes and inner air inlet holes are used to extend the blower. The combination of air replacement is achieved, the ash temperature is reduced, and the spiral conveying blades are protected.
It effectively reduces the boiler ash temperature, reduces wear during spiral transport, reduces maintenance costs, and reduces the risk of scalding caused by high temperature and high dust.
Smart Images
Figure CN222164836U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of incinerators, and in particular relates to an ash conveying device for an ash hopper of a waste heat boiler. Background Art
[0002] The ash conveyor above the ash hopper of the waste heat boiler is a screw conveyor, which is used to transport dust and ash blocks from the second and third furnaces of the waste heat boiler, and transport the dust and ash blocks to the burning grate, and then from the grate to the slag discharger, and finally from the slag discharger to the slag pool. The flue gas temperature at the outlet of the first furnace of the incinerator is about 800℃, but with the increasing calorific value of garbage year by year, the flue gas temperature at the outlet of the incinerator has exceeded 1000℃ for a long time. The high-temperature flue gas increases the temperature around the screw conveyor above the ash hopper, aggravating the wear of the screw conveyor shaft and blades. At present, normal operation is maintained by regularly replacing worn blades and conveyor shafts, but each maintenance requires a lot of manpower and material resources, and there is also a risk of scalding due to high temperature, high dust and other factors during the repair process. Utility Model Content
[0003] The utility model provides an ash conveying device for an ash hopper of a waste heat boiler, which solves the problem that the existing device for spirally conveying boiler ash aggravates the wear of the screw conveyor shaft and blades when the ambient temperature rises.
[0004] The utility model provides the following technical scheme: it includes three gravity feeding plates, the three gravity feeding plates are connected, the bottom ends of the three gravity feeding plates are fixedly connected with a reducer, the bottom of the reducer is fixedly connected to the feeding pipe, the inner wall of the feeding pipe is fixedly connected with a plurality of equally distributed inclined plates, the outer side of the feeding pipe is sleeved with an external tube, the top of the external tube is fixedly connected with an annular cover, the annular cover and the external tube are respectively provided with staggered external air inlet holes and internal air inlet holes, the bottom of the external tube is detachably connected with a connecting pipe, one end of the connecting pipe is connected with a main pipe, one end of the main pipe is provided with a blower, the bottoms of the three feeding pipes are fixedly connected with a support plate, and a conveying pipe connected with the feeding pipe is provided in the support plate.
[0005] Among them, one of the gravity feeding plates is provided with a feeding port at the top, the three gravity feeding plates have a certain angle, and a feeding hole is opened at the connection between the gravity feeding plate and the reducer.
[0006] Among them, the outer wall of the feed tube is provided with a plurality of equally spaced inclined holes, and the feed tube and the external cylinder are connected through the inclined holes.
[0007] Among them, a connecting hole matching the connecting pipe is opened at the bottom of the external cylinder, a rotating rod is fixedly connected to the outer wall of the connecting pipe, a mounting pipe matching the outer wall of the connecting pipe is fixedly connected to the outer wall of the main pipe, and a filter cotton is detachably connected to the inner wall of the connecting pipe.
[0008] Wherein, the inner walls of the outer air inlet hole and the inner air inlet hole are both fixedly connected with filter plates, and one side of the support plate is provided with a fixing plate for supporting the blower.
[0009] The beneficial effects of the utility model are as follows: the three gravity discharge plates are interconnected and inclined, so that the temperature of the boiler will continue to decrease as it slides down continuously, and at the same time, the boiler ash entering the discharge pipe has its falling time increased and its temperature reduced under the action of the inclined plates, and the temperature of the space in contact with the discharge pipe inside the external cylinder can be replaced by air under the action of the main pipe and the connecting pipe to avoid heat accumulation, thereby reducing the temperature of the boiler ash entering the conveying pipe for spiral transportation, thereby ensuring the protection effect of the spiral blades of the spiral transportation in the conveying pipe.
[0010] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0012] Figure 2 It is a three-dimensional structural schematic diagram of the external cylinder in the utility model;
[0013] Figure 3 It is a schematic diagram of the cross-sectional structure of the feed pipe in the utility model;
[0014] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.
[0015] In the figure: 1. Gravity feed plate; 11. Feed inlet; 12. Reducer; 2. Feed pipe; 21. Inclined plate; 22. Support plate; 23. Feed pipe; 24. Inclined hole; 3. Fixed plate; 31. Blower; 32. Main pipe; 321. Mounting pipe; 33. Connecting pipe; 331. Rotating rod; 34. External cylinder; 35. Ring cover; 351. External air inlet; 352. Internal air inlet; 36. Filter plate; 37. Connecting hole; 38. Filter cotton. DETAILED DESCRIPTION
[0016] See also Figure 1-Figure 4The utility model provides the following technical scheme: it includes three gravity feeding plates 1, the three gravity feeding plates 1 are connected, the bottom ends of the three gravity feeding plates 1 are fixedly connected with a reducer 12, the bottom of the reducer 12 is fixedly connected to the feeding pipe 2, the inner wall of the feeding pipe 2 is fixedly connected with a plurality of equally distributed inclined plates 21, the outer side of the feeding pipe 2 is sleeved with an external tube 34, the top of the external tube 34 is fixedly connected with an annular cover 35, the annular cover 35 and the external tube 34 are respectively provided with staggered external air inlet holes 351 and internal air inlet holes 352, the bottom of the external tube 34 is detachably connected with a connecting pipe 33, one end of the connecting pipe 33 is connected with a main pipe 32, one end of the main pipe 32 is provided with a blower 31, the bottoms of the three feeding pipes 2 are fixedly connected with a supporting plate 22, and a feeding pipe 23 connected to the feeding pipe 2 is provided in the supporting plate 22.
[0017] In this embodiment, the three gravity unloading plates 1 are connected, so that when the boiler ash is unloaded, the boiler ash is put into the gravity unloading plate 1 at the top. At this time, since the three gravity unloading plates 1 are connected and the whole is inclined, the boiler ash will continue to slide downward under the action of its own gravity, and when the boiler ash slides downward, the reducer 12 connected to the bottom can receive part of the remaining boiler ash. The boiler ash on the gravity unloading plate 1 in the first section has the highest temperature. When the boiler ash falls into the reducer 12 and then slides downward through the unloading pipe 2 fixedly connected to the bottom end of the reducer 12, the unloading pipe 2 has a relatively long length, so that the part with a higher temperature can be in a longer section. As the ash moves downward continuously in the discharge pipe 2, its temperature is continuously reduced, so that when it enters the delivery pipe 23 in the support plate 22 through the spiral transmission, the temperature of the boiler ash has dropped to a lower temperature, thereby preventing the boiler ash from being directly in the delivery pipe 23 through the spiral transportation, where the heat accumulation is high and the wear on the spiral blades is large. While part of the boiler ash enters the first section of the discharge pipe 2, part of the boiler ash will also slide into the second and third sections of the gravity discharge plate 1 under its own gravity. The boiler ash in the second and third sections is in contact with the outside air for a longer time than the boiler ash in the first section of the gravity discharge plate 1, so that its temperature is lower than that of the first section, thereby making the boiler ash in the second and third sections When the boiler ash is discharged into the discharge pipe 2 below the third section, it can also increase the time for the boiler ash to enter the feed pipe 23, so that when the boiler ash is discharged into the feed pipe 23, its temperature can be effectively cooled down to avoid direct discharge into the feed pipe 23 when the temperature is high, resulting in heat accumulation that seriously increases the loss of the device, thereby reducing the cost of spiral transportation in the feed pipe 23. When the boiler ash slides downward in the discharge pipe 2, a plurality of inclined plates 21 fixedly connected to the inner wall of the discharge pipe 2 are staggered, so that after the boiler ash slides downward in the discharge pipe 2, the time for the boiler ash to slide downward in the discharge pipe 2 can be increased. When the boiler ash is discharged downward in the discharge pipe 2, a plurality of inclined plates 21 fixedly connected to the inner wall of the discharge pipe 2 are staggered, so that after the boiler ash slides downward in the discharge pipe 2, the inclined plates 21 arranged on the discharge pipe 2 can be increased. The external cylinder 34 of the outer wall can allow the outside air to enter the annular cover 35 through the outer air inlet hole 351 through the annular cover 35 fixedly connected to the top of the outer wall, and then enter between the external cylinder 34 and the discharge pipe 2 through the inner air inlet hole 352. After the outside air enters the external cylinder 34, it can be discharged to the outside through the connecting pipe 33 and the main pipe 32. The blower 31 continuously draws air, so that the discharge pipe 2 is constantly in contact with the outside air, and is in contact with the outside air with a lower temperature, so as to avoid the boiler ash from being continuously dropped in the discharge pipe 2, thereby increasing the heat removal efficiency when the boiler ash is transported downward, and ensuring the protection effect of the spiral blades of the spiral conveyor in the conveying pipe 23.
[0018] One of the gravity feeding plates 1 is provided with a feed inlet 11 at the top, and the three gravity feeding plates 1 have a certain angle. A feed hole is opened at the connection between the gravity feeding plate 1 and the reducer 12; the feed inlet 11 at the top of the gravity feeding plate 1 is used to enable the boiler ash to be discharged directly into the gravity feeding plate 1 through the feed inlet 11. The gravity feeding plate 1 has a certain angle, which is convenient for the boiler ash to continuously slide down. The feed hole opened between the gravity feeding plate 1 and the reducer 12 is used for the boiler ash to fall into the feeding pipe 2, and enter the feed pipe 23 through the feeding pipe 2 for spiral transportation.
[0019] A plurality of equally spaced inclined holes 24 are provided on the outer wall of the feed pipe 2, and the feed pipe 2 and the external cylinder 34 are connected via the inclined holes 24; the plurality of inclined holes 24 provided on the outer wall of the feed pipe 2 are used to connect the feed pipe 2 and the external cylinder 34, so that the gas in the feed pipe 2 can be discharged to the outside, and at the same time, the inclined holes 24 are located on the outer wall of the feed pipe 2, with the outer opening at the top and the inner opening at the bottom, which can prevent boiler ash from entering the external cylinder 34 through the inclined holes 24.
[0020] A connecting hole 37 matching the connecting tube 33 is provided at the bottom of the external cylinder 34, a rotating rod 331 is fixedly connected to the outer wall of the connecting tube 33, a mounting tube 321 matching the outer wall of the connecting tube 33 is fixedly connected to the outer wall of the main pipe 32, and a filter cotton 38 is detachably connected to the inner wall of the connecting tube 33; the connecting hole 37 provided at the bottom of the external cylinder 34 is threadedly connected to the connecting tube 33, and the connecting tube 33 can be easily rotated through the rotating rod 331 to connect to the outer wall of the external cylinder 34, so that the internal gas is discharged outwardly, and the other end of the connecting tube 33 is inserted into the mounting tube 321 fixedly connected to the main pipe 32, so that the mounting tube 321 can make way for the installation and removal of the connecting tube 33, and the filter cotton 38 provided in the connecting tube 33 is used to filter the gas to prevent dust from being directly discharged to the outside, thereby filtering the internal dust.
[0021] The inner walls of the outer air inlet hole 351 and the inner air inlet hole 352 are fixedly connected with a filter plate 36, and one side of the support plate 22 is provided with a fixed plate 3 for supporting the blower 31; the filter plate 36 fixedly connected to the inner walls of the outer air inlet hole 351 and the inner air inlet hole 352 is used to filter the opening when the outside air is drawn to replace the gas in the external tube 34, so as to prevent external debris from entering the external tube 34, and the fixed plate 3 is used to support and install the blower 31.
[0022] The working principle and use process of the utility model are as follows: boiler ash is put into the gravity discharge plate 1 at the top. The boiler ash on the gravity discharge plate 1 in the first section has the highest temperature. The boiler ash falls into the reducer 12 and then slides downward through the discharge pipe 2 fixedly connected to the bottom end of the reducer 12, so that the part with higher temperature can be in the longer section of the discharge pipe 2. When it moves downward continuously, its temperature continues to decrease. Part of the boiler ash will also slide into the second and third sections of the gravity discharge plate 1 under its own gravity. The boiler ash in the second and third sections is in contact with the outside air for a longer time than the boiler ash in the first section of the gravity discharge plate 1, so that its temperature is lower than that of the first section, so that the boiler ash is in the discharge pipe 2 below the second and third sections for During discharge, it can also increase the time for boiler ash to enter the feed pipe 23, so that when the boiler is discharged into the feed pipe 23, its temperature can be effectively cooled down. At the same time, after the outside air can enter the annular cover 35, it can enter between the external cylinder 34 and the discharge pipe 2 through the internal air inlet hole 352. After the outside air enters the external cylinder 34, it can be discharged to the outside through the connecting pipe 33 and the main pipe 32. The blower 31 continuously draws air to make the discharge pipe 2 constantly contact with the outside air and the outside air with lower temperature, so as to avoid the accumulation of heat when the boiler ash is continuously descending in the discharge pipe 2, thereby increasing the heat removal efficiency when the boiler ash is transported downward, and ensuring the protection effect of the spiral blades of the spiral conveyor in the feed pipe 23.
Claims
1. A waste heat boiler ash hopper ash conveying device, comprising three gravity feed plates (1), characterized in that: The three gravity unloading plates (1) are connected, and the bottom ends of the three gravity unloading plates (1) are fixedly connected to a reducer (12), the bottom of the reducer (12) is fixedly connected to a unloading pipe (2), the inner wall of the unloading pipe (2) is fixedly connected to a plurality of equally spaced inclined plates (21), the outer side of the unloading pipe (2) is sleeved with an external tube (34), the top of the external tube (34) is fixedly connected to an annular cover (35), and the annular cover (35) and the external tube (34) are respectively provided with staggered external air inlet holes (351) and internal air inlet holes (352); the bottom of the external cylinder (34) is detachably connected with a connecting pipe (33); one end of the connecting pipe (33) is connected with a main pipe (32); one end of the main pipe (32) is provided with a blower (31); the bottoms of the three feeding pipes (2) are fixedly connected with a support plate (22); a feeding pipe (23) connected with the feeding pipe (2) is provided inside the support plate (22).
2. The ash hopper ash conveying device for waste heat boiler according to claim 1 is characterized in that: A feeding port (11) is provided at the top of one of the gravity feeding plates (1), the three gravity feeding plates (1) have a certain angle, and a feeding hole is provided at the connection between the gravity feeding plate (1) and the reducer (12).
3. The ash hopper ash conveying device for waste heat boiler according to claim 1 is characterized in that: The outer wall of the feed tube (2) is provided with a plurality of equally spaced inclined holes (24), and the feed tube (2) and the external cylinder (34) are connected via the inclined holes (24).
4. The ash hopper ash conveying device for waste heat boiler according to claim 1, characterized in that: A connecting hole (37) matching the connecting tube (33) is provided at the bottom of the external cylinder (34); a rotating rod (331) is fixedly connected to the outer wall of the connecting tube (33); a mounting tube (321) matching the outer wall of the connecting tube (33) is fixedly connected to the outer wall of the main tube (32); and a filter cotton (38) is detachably connected to the inner wall of the connecting tube (33).
5. The ash hopper ash conveying device for waste heat boiler according to claim 1 is characterized in that: The inner walls of the outer air inlet hole (351) and the inner air inlet hole (352) are both fixedly connected with filter plates (36), and one side of the support plate (22) is provided with a fixing plate (3) for supporting the blower (31).