A bridge removal device for storage tanks

Abstract

This application discloses a debridging device for storage tanks, comprising: a debridging sleeve assembly disposed within the storage tank and movable along the axial direction of the storage tank; an air inlet disposed at one end of the debridging sleeve assembly; and an air inlet channel disposed within the debridging sleeve assembly, with one end connected to the air inlet and the other end connected to the storage tank. When the debridging sleeve assembly moves along the axial direction of the storage tank, the air inlet channel is used to introduce gas into different height positions within the storage tank to loosen powder particles located at different height positions within the storage tank. This device has a simple structure and improves the efficiency of debridging in storage tanks.

Description

Technical Field

[0001] This application relates to the technical field of pulverized coal storage equipment, and more specifically, to a bridge removal device for a storage tank. Background Technology

[0002] Currently, the high-pressure pulverized coal conveying system is one of the core processes of pulverized coal gasification technology, mainly including filters, low-pressure storage tanks, lock hoppers, and feed tanks.

[0003] Among them, storage tanks storing coal powder and other powders are prone to powder bridging during the unloading process, which affects the unloading of powder and thus affects the overall operational stability of the system.

[0004] In existing technology, the general procedure for dealing with bridging in pulverized coal lock hoppers is as follows: First, close the balance valve between the pulverized coal lock hopper and the feed tank, and close the pulverized coal lock hopper discharge valve. Then, open the air inlet valve of the pulverized coal lock hopper's air inlet cone to blow upwards, or open the upper pressure valve of the pulverized coal lock hopper to press downwards. The above solution is ineffective at removing bridging, failing to loosen the powder in the middle section of the lock hopper, thus reducing the efficiency of bridging removal. Furthermore, the operation requires temporarily pausing the pulverized coal lock hopper's discharge, affecting the normal operation of the pulverized coal conveying system.

[0005] In conclusion, how to improve the efficiency of bridging without affecting the normal operation of the pulverized coal conveying system is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide a bridge removal device for storage tanks. This device has a simple structure and can improve the efficiency of bridge removal without affecting the normal operation of the pulverized coal conveying system.

[0007] To achieve the above objectives, this application provides a bridge removal device for storage tanks, comprising:

[0008] Except for the bridge sleeve assembly, it is located inside the storage tank and can move along the axial direction of the storage tank;

[0009] An air inlet is located at one end of the bridge-removing sleeve assembly;

[0010] An air inlet channel is provided in the bridge removal sleeve assembly, with one end connected to the air inlet and the other end connected to the storage tank. When the bridge removal sleeve assembly moves along the axial direction of the storage tank, the air inlet channel is used to introduce gas into different height positions inside the storage tank to loosen the powder located at different height positions inside the storage tank.

[0011] Preferably, the bridge-removing sleeve assembly includes:

[0012] An outer sleeve, one end of which is located inside the storage tank and extends along the axial direction of the storage tank to the bottom of the storage tank, has multiple first through holes communicating with the storage tank;

[0013] The inner sleeve, with one end located inside the outer sleeve and movable along the outer sleeve, has multiple second through holes communicating with the outer sleeve. The first through hole, the second through hole, and the inner sidewall of the inner sleeve form the air intake channel.

[0014] Preferably, the air inlet is located at the end of the inner sleeve outside the storage tank.

[0015] Preferably, all the first through holes are evenly distributed in the first preset section of the outer sleeve, and all the second through holes are evenly distributed in the second preset section at the bottom of the inner sleeve, and the inner sleeve drives the second preset section to move within the range of the first preset section.

[0016] Preferably, all the first through holes are uniformly arranged along the circumferential wall and axial direction of the outer sleeve, and the diameter of the first through holes is 3-20 μm.

[0017] Preferably, all the second through holes are uniformly arranged along the circumferential wall and axial direction of the inner sleeve, and the diameter of the second through holes is 1-3 mm.

[0018] Preferably, the bridge sleeve assembly further includes:

[0019] A sealed cavity is connected to one end of the outer sleeve located outside the storage tank and is sealed to the inner sleeve. An inert gas is provided inside the sealed cavity to prevent the powder from floating out.

[0020] Preferably, the bridge sleeve assembly further includes:

[0021] A driving component is connected to one end of the inner sleeve that extends out of the outer sleeve, and is used to drive the inner sleeve to move along the outer sleeve.

[0022] Compared to the aforementioned background technology, this application adds a debridging sleeve assembly. This assembly is located inside the storage tank and can move vertically along the tank's axis. It has an air inlet channel communicating with the tank. Gas enters the tank through this channel, loosening the powder inside. Simultaneously, as the debridging sleeve assembly moves vertically, the air inlet channel also moves vertically, allowing gas to be introduced to different locations within the tank to loosen powder at different heights, making it easier for the bridging within the tank to fall off. In this way, the device can improve the efficiency of debridging without affecting the normal operation of the pulverized coal conveying system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the bridge removal device for storage tanks provided in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the sealing cavity provided in the embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the second through hole provided in an embodiment of this application.

[0027] in:

[0028] 1-1 is the air inlet, 1-2 is the driving component, 1-3 is the inner sleeve, 1-4 is the second through hole, 2-1 is the sealing cavity, 2-2 is the outer sleeve, 2-3 is the first through hole, and 2-4 is the sealed air inlet. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] This application provides a bridge removal device for a storage tank, including a bridge removal sleeve assembly, an air inlet 1-1, and an air inlet channel. The bridge removal sleeve assembly is disposed inside the storage tank and is movable along the axial direction of the tank. The air inlet 1-1 is located at one end of the bridge removal sleeve assembly. The air inlet channel is located on the bridge removal sleeve assembly, with one end connected to the air inlet 1-1 and the other end connected to the storage tank. When the bridge removal sleeve assembly moves along the axial direction of the storage tank, the air inlet channel is used to introduce gas into different height positions within the storage tank to loosen powder located at different height positions within the storage tank.

[0032] During the unloading process of the aforementioned storage tank, powder bridging is prone to occur, which can block the outlet of the storage tank, affect the unloading of powder, and consequently affect the overall operational stability of the system. Therefore, this application designs a bridging device to solve this problem.

[0033] When the debriding device is working, gas enters the storage tank through the inlet channel, loosening the powder inside. Simultaneously, as the debriding sleeve assembly moves up and down, the inlet channel also moves accordingly, allowing gas to reach different locations within the tank to loosen powder at varying heights, making it easier for the bridging to fall. In this way, the device can improve debriding efficiency without affecting the normal operation of the pulverized coal conveying system.

[0034] Based on the above embodiments, as a further preferred embodiment, the bridge sleeve assembly includes an outer sleeve 2-2 and an inner sleeve 1-3. One end of the outer sleeve 2-2 is located inside the storage tank and extends axially along the bottom of the tank, having multiple first through holes 2-3 communicating with the tank. One end of the inner sleeve 1-3 is located inside the outer sleeve 2-2 and is movable along the outer sleeve 2-2, having multiple second through holes 1-4 communicating with the outer sleeve 2-2. The first through holes 2-3, the second through holes 1-4, and the inner wall of the inner sleeve 1-3 form an air intake channel.

[0035] Specifically, with attachment Figure 1 With the orientation as a reference, one end of the outer sleeve 2-2 is fixedly installed inside the storage tank, while one end of the inner sleeve 1-3 can move up and down relative to the storage tank and the outer sleeve 2-2. The bottom ends of both the outer sleeve 2-2 and the inner sleeve 1-3 are sealed. During operation, the gas flowing into the inner sleeve 1-3 is introduced into the storage tank by aligning the second through hole 1-4 on the inner sleeve 1-3 with the first through hole 2-3 on the outer sleeve 2-2.

[0036] Of course, a sleeve can also be used to remove bridging, but since the sleeve is inserted directly into the powder, the through hole on the sleeve comes into direct contact with the powder. The powder can easily block the through hole, preventing gas from passing through it into the storage tank, thus resulting in poor bridging performance.

[0037] Meanwhile, since the bridge has a certain height, the embodiment of this application is optimal in order to achieve multi-directional disturbance.

[0038] Based on the above embodiments, as a further preferred embodiment, the air inlet 1-1 is located at one end of the inner sleeve 1-3 located outside the storage tank.

[0039] Of course, the specific location of the air intake 1-1 is not specified in this article.

[0040] Based on the above embodiments, as a further preferred embodiment, all the first through holes 2-3 are evenly arranged in the first preset section of the outer sleeve 2-2, and all the second through holes 1-4 are evenly arranged in the second preset section at the bottom of the inner sleeve 1-3, and the inner sleeve 1-3 drives the second preset section to move within the range of the first preset section.

[0041] Specifically, the first and second preset segments mentioned above refer to a certain position on the outer sleeve 2-2 and the inner sleeve 1-3.

[0042] When the inner sleeve 1-3 moves up and down, the second preset section of the inner sleeve 1-3 is controlled to repeatedly move up and down within the first preset section of the outer sleeve 2-2 to ensure that the second through hole 1-4 can always face the first through hole 2-3, so that the gas can always flow into the storage tank through the air inlet 1-1, the air inlet channel, the second through hole 1-4 and the first through hole 2-3 in sequence.

[0043] In addition, to ensure the bridge removal effect, the gas flow rate is controlled within 40-60 m / s.

[0044] Based on the above embodiments, as a further preferred embodiment, all the first through holes 2-3 are uniformly arranged along the circumferential wall and axial direction of the outer sleeve 2-2, and the diameter of the first through holes 2-3 is 3-20μm.

[0045] Specifically, the upper section of the outer sleeve 2-2 is an annular sleeve, and the lower section is sintered metal.

[0046] Based on the above embodiments, as a further preferred embodiment, all the second through holes 1-4 are uniformly arranged along the circumferential wall and axial direction of the inner sleeve 1-3, and the diameter of the second through holes 1-4 is 1-3mm.

[0047] In other words, multiple rows of second through holes 1-4 are provided at intervals along the axial direction of the inner sleeve 1-3, and each row of second through holes 1-4 is provided at intervals along the circumferential sidewall of the inner sleeve 1-3.

[0048] Based on the above embodiments, as a further preferred embodiment, in addition to the bridge sleeve assembly, a sealing cavity 2-1 is also included, which is connected to the outer sleeve 2-2 located outside the storage tank and is sealed to the inner sleeve 1-3. An inert gas is provided in the sealing cavity 2-1 to prevent powder from floating out.

[0049] Specifically, the sealing cavity 2-1 and the outer sleeve 2-2 are integrally formed. That is, the end of the outer sleeve 2-2 located outside the storage tank is the sealing cavity 2-1, and the size of the sealing cavity 2-1 is larger than the size of the outer sleeve 2-2. One end of the inner sleeve 1-3 is inserted into the sealing cavity 2-1 and the outer sleeve 2-2 in sequence, and the connection between the inner sleeve 1-3 and the sealing cavity 2-1 is sealed. At the same time, the end of the sealing cavity 2-1 away from the storage tank is provided with a sealing air inlet 2-4. Inert gas is introduced into the sealing cavity 2-1 through the sealing air inlet 2-4, thereby achieving the sealing effect.

[0050] Furthermore, since the density of inert gas is greater than that of air, the pressure inside the sealed cavity 2-1 is greater than the pressure inside the storage tank. This pressure difference will tightly seal the powder inside the storage tank to prevent the powder from rising into the sealed cavity 2-1.

[0051] Of course, the pressure difference between the sealing cavity 2-1 and the storage tank should not be too large, otherwise it will affect the efficiency of bridge removal; nor should it be too small, otherwise the sealing effect will not be obvious. It is sufficient to maintain the pressure difference between the sealing cavity 2-1 and the storage tank at 5-7 kPa.

[0052] Based on the above embodiments, as a further preferred embodiment, in addition to the bridge sleeve assembly, a driving member 1-2 is also included, which connects to one end of the inner sleeve 1-3 extending out of the outer sleeve 2-2, for driving the inner sleeve 1-3 to move along the outer sleeve 2-2.

[0053] In addition, the drive unit 1-2 can also be coupled to a sensor to control the inner sleeve 1-3 to move up and down automatically, thereby achieving automatic bridge removal and improving bridge removal efficiency.

[0054] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0055] The foregoing has provided a detailed description of the present application. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present application. It should be noted that those skilled in the art can make various improvements and modifications to the present application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A bridge removing device for a storage tank, characterized by comprising: The application relates to a powder loosening device for a powder storage tank. The device comprises: a bridge-removing sleeve assembly arranged in the powder storage tank and movable along the axial direction of the powder storage tank; an air inlet arranged at one end of the bridge-removing sleeve assembly; an air passage arranged in the bridge-removing sleeve assembly and having one end communicated with the air inlet and the other end communicated with the powder storage tank, the air passage being used for passing gas into the powder storage tank at different heights when the bridge-removing sleeve assembly moves along the axial direction of the powder storage tank, so as to loosen the powder at different heights in the powder storage tank; the bridge-removing sleeve assembly comprises: an outer sleeve arranged in the powder storage tank and extending along the axial direction of the powder storage tank to the bottom of the powder storage tank, and having a plurality of first through holes communicated with the powder storage tank; an inner sleeve arranged in the outer sleeve and movable along the outer sleeve, and having a plurality of second through holes communicated with the outer sleeve, the first through holes, the second through holes and the inner side wall of the inner sleeve forming the air passage; the bridge-removing sleeve assembly further comprises: a sealed cavity communicated with one end of the outer sleeve outside the powder storage tank and sealingly connected with the inner sleeve, inert gas being arranged in the sealed cavity to prevent the powder from floating out; the bridge-removing sleeve assembly further comprises:

2. The bridge removing device for a storage tank according to claim 1, characterized by a driving member connected with one end of the inner sleeve extending out of the outer sleeve and used for driving the inner sleeve to move along the outer sleeve.

3. The bridge removing device for a storage tank according to claim 1, characterized by The air inlet is arranged at one end of the inner sleeve outside the powder storage tank.

4. The bridge removing device for a storage tank according to claim 3, characterized by All the first through holes are uniformly arranged in a first preset section of the outer sleeve, and all the second through holes are uniformly arranged in a second preset section at the bottom of the inner sleeve, the inner sleeve driving the second preset section to move in the range of the first preset section.

5. The bridge removing device for a storage tank according to claim 3, characterized by All the first through holes are uniformly arranged along the circumferential wall and the axial direction of the outer sleeve, and the diameter of the first through holes is 3-20 mu m. All the second through holes are uniformly arranged along the circumferential wall and the axial direction of the inner sleeve, and the diameter of the second through holes is 1-3 mm.

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