Ash discharging pipe device of material return valve
By introducing inclined ash discharge pipes and adjustable ash discharge devices into circulating fluidized bed boilers, the problems of uncontrollable ash discharge and difficulty in recovering returned ash have been solved, achieving precise control of ash discharge and safe and efficient ash and slag recovery, thus ensuring the stable operation of the boiler.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-03-20
AI Technical Summary
The existing circulating fluidized bed boiler's return material device has problems such as uncontrollable ash discharge, difficulty in recycling returned ash, and environmental pollution.
A return valve ash discharge pipe device was designed, including a slanted ash discharge pipe and an adjustable ash discharge and self-sealing device. The ash discharge amount is controlled by adjusting the insertion depth of the insert plate, and the ash blockage is monitored by a vibrator and a remote monitoring camera, so as to achieve controllable sealing and remote handling.
It achieves precise control of ash discharge, avoids environmental pollution and waste of manpower, improves safety, reduces the space occupied by high-temperature ash, and ensures stable boiler operation.
Smart Images
Figure CN224018388U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a back material valve technology field, specifically is a back material valve ash pipe device. BACKGROUND
[0002] The purpose of the back material of the circulating fluidized bed boiler is to send the unburned carbon in the back material ash back to the bed to burn to improve the combustion efficiency of the boiler, reduce the carbon content of fly ash and large slag, and maintain the fluidization of the material in the furnace.
[0003] Under normal circumstances, the back material ash does not need to be discharged, because the circulation ratio is certain corresponding to a certain load, but when the back material valve temperature and the bed temperature continue to slowly decrease during operation, the back material ash needs to be discharged regularly to improve the bed temperature and maintain the stable operation of the boiler.
[0004] However, the existing back material device has the following problems: (1) the back material ash is discharged according to experience, and the ash discharge amount is uncontrollable, which may cause incorrect ash discharge due to judgment error, and remedial measures are necessary, which poses a hidden danger to the safe operation of the boiler; (2) the back material ash does not enter the cold slag machine, and is transported to a temporary storage point by a small cart during back material ash discharge, which pollutes the environment, consumes manpower, occupies space, has high ash temperature and poor safety. UTILITY MODEL CONTENT
[0005] (I) Technical problem solved
[0006] In view of the deficiencies of the prior art, the utility model provides a back material valve ash discharge pipe device, which can control the ash discharge speed and amount, and facilitate the recycling of back material ash, to solve the problems that the ash discharge speed and amount are not convenient to control in the prior art, and the back material ash is difficult to recycle.
[0007] (II) Technical scheme
[0008] In order to achieve the above purpose, the utility model provides a back material valve ash discharge pipe device, which comprises a back material valve and a fluidized bed boiler, an original ash discharge pipe is fixedly installed on the back material valve, the original ash discharge pipe is communicated with the back material valve, a fluidized bed slag falling pipe is fixedly installed on the fluidized bed boiler, the fluidized bed slag falling pipe is communicated with the fluidized bed, an inclined inclined ash discharge pipe is fixedly arranged between the original ash discharge pipe and the fluidized bed slag falling pipe, the inclined ash discharge pipe communicates the original ash discharge pipe and the fluidized bed slag falling pipe, adjustable ash discharge and self-sealing devices are installed at the ends of the original ash discharge pipe and the inclined ash discharge pipe, the adjustable ash discharge and self-sealing devices can adjust the ash discharge amount of the original ash discharge pipe and the inclined ash discharge pipe, and can controllably seal the original ash discharge pipe and the inclined ash discharge pipe.
[0009] Further, the adjustable ash discharging and self-sealing device comprises a shell, a limiting plate, a limiting bolt and an insertion plate, the shell is fixed and communicated with the original ash discharging pipe, one side of the shell is provided with a movable opening, the limiting plate is fixed on the side of the shell provided with the movable opening, and the insertion plate is movably inserted into the movable opening and is bolted between the limiting plate and the limiting bolt.
[0010] Further, the included angle between the original ash discharging pipe and the obliquely connected ash discharging pipe is 35°.
[0011] Further, a funnel is fixed at the connection position of the obliquely connected ash discharging pipe and the fluidized bed slag falling pipe.
[0012] Further, the materials of the original ash discharging pipe, the obliquely connected ash discharging pipe and the adjustable ash discharging and self-sealing device are all 15CrMo steel.
[0013] Further, a vibrator is further included and is installed on the obliquely connected ash discharging pipe.
[0014] Further, a remote monitoring camera is further included and can monitor the original ash discharging pipe, the obliquely connected ash discharging pipe and the adjustable ash discharging and self-sealing device.
[0015] Further, the vibrator and the remote monitoring camera are both communicated with the DCS system of the centralized control room.
[0016] (Three) beneficial effects
[0017] Compared with the prior art, the utility model provides a kind of back material valve ash discharging pipe device, with following
[0018] Beneficial effects:
[0019] 1. The utility model discloses an original ash discharging pipe and obliquely connected ash discharging pipe, and the included angle between the obliquely connected ash discharging pipe and the original ash discharging pipe is about 35°, so that the back material process retains the original ash discharging pipe inherent ash discharging function during maintenance, and the ash of back material valve is sent to the slag cooler for recycling, which saves manpower, avoids space occupation, and avoids the environmental impact and threat to personal safety caused by high-temperature back material ash.
[0020] 2. The utility model discloses an adjustable ash discharging and self-sealing device, which is bolted with the insertion plate and the limiting plate through the limiting bolt, to avoid random operation and misoperation, block back material ash during non-ash discharging period, play a self-sealing role, manually operate the insertion plate to control the insertion depth of the insertion plate to control the ash discharging speed and ash discharging amount, which is easier to operate and more quantifiable.
[0021] 3. The utility model discloses a vibrator and monitoring device, which can remotely find possible ash blocking situation and remotely handle it in time. DRAWINGS
[0022] Figure 1The front view structure schematic diagram of the utility model discloses a front view structure schematic diagram of the adjustable ash discharging and self-sealing device;
[0023] Figure 2 The adjustable ash discharging and self-sealing device's structure schematic diagram is shown;
[0024] Figure 3 The structure schematic diagram of the shell is shown. Figure 2 The structure schematic diagram of the shell is shown.
[0025] Figure 4 The structure schematic diagram of the shell is shown.
[0026] In the drawing: 1, the original ash discharging pipe;2, the fluidized bed slag pipe;3, the inclined ash discharging pipe;4, the adjustable ash discharging and self-sealing device;41, the shell;42, the limiting plate;43, the limiting bolt;44, the plug;5, the movable opening;6, the hopper;7, the vibrator;8, the remote monitoring camera. DETAILED DESCRIPTION
[0027] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range protected by the utility model.
[0028] Embodiment: please refer to Figures 1 to 4 , according to the embodiment of the utility model provides a kind of technical scheme: a back material valve ash discharging pipe device, including back material valve and fluidized bed boiler, back material valve is fixed with original ash discharging pipe 1, original ash discharging pipe 1 is communicated with back material valve, fluidized bed boiler is fixed with fluidized bed slag pipe 2, fluidized bed slag pipe 2 is communicated with fluidized bed, original ash discharging pipe 1 and fluidized bed slag pipe 2 between fixedly set inclined inclined ash discharging pipe 3, inclined ash discharging pipe 3 communicates original ash discharging pipe 1 and fluidized bed slag pipe 2, original ash discharging pipe 1 end and inclined ash discharging pipe 3 end are equipped with adjustable ash discharging and self-sealing device 4, adjustable ash discharging and self-sealing device 4 can adjust the ash discharging amount of original ash discharging pipe 1 and inclined ash discharging pipe 3, and controllable sealing is carried out to original ash discharging pipe 1 and inclined ash discharging pipe 3, it needs to be explained, adjustable ash discharging and self-sealing device 4 can be in original ash discharging pipe 1 and inclined ash discharging pipe 3 both open opening, by a plug 44 insertion original ash discharging pipe 1 and inclined ash discharging pipe 3 are sealed and controlled ash discharging, also can, by a round plate in original ash discharging pipe 1 and inclined ash discharging pipe 3 rotation connection, by motor or manually rotating round plate, so that round plate is sealed and controlled ash discharging in original ash discharging pipe 1 and inclined ash discharging pipe 3.
[0029] The ash discharge pipe device with the return valve adopts the structure that a straight pipe section of the original ash discharge pipe 1 is obliquely connected with an obliquely connected ash discharge pipe 3 to connect the ash to the fluidized bed slag pipe 2, so that the ash is mixed with the ash and slag of the fluidized bed boiler and is collected in the cold slag machine, thereby solving the problem that the existing return valve ash does not enter the cold slag machine and is discharged in an open place; the adjustable ash discharge and self-sealing device 4 is arranged at the end of the original ash discharge pipe 1 and the end of the obliquely connected ash discharge pipe 3, thereby solving the problems of uncontrollable ash discharge and incorrect ash discharge.
[0030] As a preferred embodiment, the adjustable ash discharge and self-sealing device 4 comprises a shell 41, a limiting plate 42, a limiting bolt 43 and a plug plate 44, the shell 41 is fixedly connected with the original ash discharge pipe 1 and is in communication with the original ash discharge pipe 1, the shell 41 is provided with a movable opening 5 on one side, the limiting plate 42 is fixedly arranged on the side of the shell 41 provided with the movable opening 5, the plug plate 44 is movably inserted into the movable opening 5, the plug plate 44 and the limiting plate 42 are connected by the limiting bolt 43, the size of the ash discharge opening is controlled by controlling the depth of the plug plate 44 inserted into the movable opening 5, and the shell 41 is sealed when the plug plate 44 is abutted against the inner wall of the shell 41.
[0031] In the embodiment, the included angle between the obliquely connected ash discharge pipe 3 and the original ash discharge pipe 1 is 35°, which is convenient for gravity ash discharge and is not easy to be blocked by ash, and the step of increasing compressed air for ash discharge can be omitted.
[0032] In the embodiment, the obliquely connected ash discharge pipe 3 and the fluidized bed slag collection place are provided with a hopper 6, which can avoid the mutual interference and blockage of the two.
[0033] In the embodiment, the obliquely connected ash discharge pipe 3 and the adjustable ash discharge and self-sealing device 4 are made of 15CrMo steel which is the same material as the original ash discharge pipe 1, and can withstand the high temperature influence of the returned ash at the original ash discharge pipe 1.
[0034] In the embodiment, a vibrator 7 is arranged on the obliquely connected ash discharge pipe 3, and a remote monitoring camera 8 is arranged, and the vibrator 7 and the remote monitoring camera 8 are in communication with the centralized control room DCS system, so that the ash blocking phenomenon can be treated in time.
[0035] Working principle: the ash in the original ash discharge pipe 1 enters the fluidized bed slag pipe 2 along the obliquely connected ash discharge pipe 3, so that the ash is mixed with the ash and slag of the fluidized bed boiler and is collected in the cold slag machine, when it is necessary to control the ash discharge amount or to seal the original ash discharge pipe 1 and the obliquely connected ash discharge pipe 3, the size of the ash discharge opening is controlled by controlling the depth of the plug plate 44 inserted into the movable opening 5, the shell 41 is sealed when the plug plate 44 is abutted against the inner wall of the shell 41, and the original ash discharge pipe 1, the obliquely connected ash discharge pipe 3 and the adjustable ash discharge and self-sealing device 4 can be monitored by the remote monitoring camera 8 during the ash discharge process, and the ash can be vibrated by the vibrator 7 when the ash blocking phenomenon occurs.
[0036] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A return valve ash discharge pipe device, comprising a return valve and a fluidized bed boiler, characterized in that, The original ash discharge pipe (1) is fixedly installed on the return valve and is connected to the return valve. The fluidized bed boiler is fixedly installed with a fluidized bed slag discharge pipe (2) and is connected to the fluidized bed. An inclined ash discharge pipe (3) is fixed between the original ash discharge pipe (1) and the fluidized bed slag discharge pipe (2). The inclined ash discharge pipe (3) connects the original ash discharge pipe (1) and the fluidized bed slag discharge pipe (2). An adjustable ash discharge and self-sealing device (4) is installed at the end of the original ash discharge pipe (1) and the end of the inclined ash discharge pipe (3). The adjustable ash discharge and self-sealing device (4) can adjust the ash discharge amount of the original ash discharge pipe (1) and the inclined ash discharge pipe (3) and controllably seal the original ash discharge pipe (1) and the inclined ash discharge pipe (3).
2. The ash discharge pipe device for a return valve according to claim 1, characterized in that: The adjustable ash discharge and self-sealing device (4) includes a housing (41), a limiting plate (42), a limiting bolt (43), and an insert plate (44). The housing (41) is fixed and connected to the original ash discharge pipe (1). A movable opening (5) is provided on one side of the housing (41). The limiting plate (42) is fixed on the side of the housing (41) where the movable opening (5) is provided. The insert plate (44) is movably inserted into the movable opening (5). The insert plate (44) and the limiting plate (42) can be bolted together by the limiting bolt (43).
3. The ash discharge pipe device for a return valve according to claim 1, characterized in that: The included angle between the original ash discharge pipe (1) and the oblique ash discharge pipe (3) is 35°.
4. The ash discharge pipe device for a return valve according to claim 1, characterized in that: A funnel (6) is fixedly installed at the connection between the inclined ash discharge pipe (3) and the fluidized bed slag discharge pipe (2).
5. The ash discharge pipe device for a return valve according to claim 1, characterized in that: The original ash discharge pipe (1), the oblique ash discharge pipe (3), and the adjustable ash discharge and self-sealing device (4) are all made of 15CrMo steel.
6. The ash discharge pipe device for a return valve according to claim 1, characterized in that: It also includes a vibrator (7), which is installed on the oblique ash discharge pipe (3).
7. The ash discharge pipe device for a return valve according to claim 6, characterized in that: It also includes a remote monitoring camera (8), which can monitor the original ash discharge pipe (1), the inclined ash discharge pipe (3) and the adjustable ash discharge and self-sealing device (4).
8. The ash discharge pipe device for a return valve according to claim 7, characterized in that: Both the vibrator (7) and the remote monitoring camera (8) are connected to the DCS system in the central control room.