Boiler ash removal assembly

Abstract

The utility model discloses a boiler deashing assembly which comprises a boiler body, a compressed air supply assembly and a pressure measuring piece, the lower end of the boiler body is a settling chamber, the lower end of the settling chamber is provided with an ash discharge port, and the side wall of the settling chamber is provided with a purging interface and a pressure tapping interface which are distributed at intervals up and down. The purging interface is communicated with an air outlet of the compressed air supply assembly, a first valve is arranged at the communication position of the purging interface and the compressed air supply assembly, the purging interface and the pressure tapping interface are both communicated with the pressure measuring piece, and a second valve is arranged at the communication position of the purging interface and the pressure measuring piece. The device is simple in structure, whether dust is accumulated in the settling chamber or not and the height of the accumulated dust can be conveniently detected, and meanwhile, the accumulated dust can be purged and discharged.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to a boiler ash cleaning assembly. Background Art

[0002] The ash hopper of the waste heat boiler is often blocked by ash. After the blockage, the feeder is running, but the ash is blocked and cannot enter the zipper machine through the feeder. It must be manually unblocked before the feeder can work normally again. The greater the amount of ash blockage, the greater the workload and difficulty of manual ash conveying. At the same time, the ash blockage will cause serious ash accumulation in the ash hopper, increase the overall weight of the boiler, and in severe cases, it will cause deformation due to insufficient load-bearing capacity of the boiler bracket and damage the boiler, bringing serious equipment safety hazards. Timely discovery of ash blockage at the feeder port of the waste heat boiler can effectively avoid equipment damage caused by ash blockage. At present, most of the inspections are done manually and the judgment of whether there is ash blockage is based on experience. CN103162303A "An anti-blocking ash outlet flue of a waste heat boiler" discloses an anti-blocking ash structure, but it will still be blocked when the ash hopper of the boiler has a large amount of ash. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a boiler ash cleaning assembly which can flexibly and conveniently detect whether there is ash blockage in the boiler settling chamber and remove ash from the settling chamber when it is blocked.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a boiler cleaning assembly, comprising a boiler body, a compressed air supply assembly and a pressure measuring device, the lower end of the boiler body is a sedimentation chamber, the lower end of the sedimentation chamber has an ash discharge port, the side wall of the sedimentation chamber has a purge interface and a pressure taking interface spaced apart up and down, the purge interface is connected to the air outlet of the compressed air supply assembly, and a first valve is arranged at the connection between the two, the purge interface and the pressure taking interface are both connected to the pressure measuring device, and a second valve is arranged at the connection between the purge interface and the pressure measuring device, and a third valve is arranged at the connection between the pressure taking interface and the pressure measuring device.

[0005] The beneficial effect of the above technical solution is that the first valve and the second valve can be closed and the third valve can be opened. At this time, the pressure measuring device measures the pressure value at the pressure taking interface. When the negative pressure value measured by the pressure measuring device is significantly reduced, it can be considered that the dust accumulation in the sedimentation chamber has covered the pressure taking interface. At this time, the first valve can be closed and the second valve can be opened. At this time, when the negative pressure measured by the pressure measuring device is normal, the dust accumulation interface in the surface sedimentation chamber is located between the pressure taking interface and the purge interface. If the negative pressure value measured by the pressure measuring device is also significantly reduced, the dust accumulation in the sedimentation chamber can be artificially The ash has covered the purge interface, so the height of the ash accumulation in the settling chamber can be easily known. When it is monitored that the ash accumulation in the settling chamber exceeds the purge interface, the second valve and the third valve can be closed, and the first valve can be opened. The compressed air supply assembly blows compressed air into the settling chamber to drain the ash in the settling chamber (the way to detect whether the ash is drained is to close the first valve and the second valve, open the third valve and observe whether the negative pressure of the pressure measuring device is normal. If it is normal, it means that the ash is drained. If it is still abnormal, it means that the ash still covers the pressure taking interface).

[0006] The above technical solution also includes a three-way piece, and the pressure-taking interface and the purge interface are both connected to the pressure measuring component through the three-way piece.

[0007] The beneficial effects of the above technical solution are: its structure is simple, and the pressure measuring component is shared by the pressure taking interface and the purge interface to roughly judge the height of the dust accumulation in the settling chamber.

[0008] In the above technical solution, a fourth valve is provided at the connection point between the three-way piece and the pressure measuring piece.

[0009] The beneficial effect of the above technical solution is that when the pressure measuring component is damaged and needs maintenance or replacement, the fourth valve can be closed to avoid pressure leakage in the sedimentation chamber.

[0010] The purge interface in the above technical solution is arranged to be tilted upward.

[0011] The beneficial effect of the above technical solution is that when the first valve is opened, the purge interface is directly purged obliquely downward to facilitate the discharge of the accumulated dust in the settling chamber.

[0012] The angle between the purge interface and the horizontal plane in the above technical solution is 30-60°.

[0013] The beneficial effects of the above technical solution are: its structure is simple and the downward blowing effect is good.

[0014] The above technical solution also includes a buffer tank, and the purge interface is connected to the compressed air supply assembly and the pressure measuring component through the buffer tank.

[0015] The beneficial effect of the above technical solution is that it can avoid the compressed air from being directly injected into the settling chamber and affecting the safe operation of the boiler.

[0016] The buffer tank in the above technical solution has three interfaces, one of which is connected to the purge interface, and the remaining two interfaces are respectively connected to the compressed air supply assembly and the pressure measuring device. The first valve is provided at the connection between the buffer tank and the compressed air supply assembly, and the second valve is provided at the connection between the buffer tank and the pressure measuring device.

[0017] The beneficial effect of the above technical solution is that it has a simple structure.

[0018] The compressed air supply assembly described in the above technical solution is an air compressor.

[0019] The beneficial effect of the above technical solution is that it has a simple structure.

[0020] The above technical solution also includes a controller, the pressure measuring device is a pressure sensor, the first valve, the second valve and the third valve are all solenoid valves, and the pressure measuring device, the first valve, the second valve, the third valve and the compressed air supply assembly are all electrically connected to the controller.

[0021] The beneficial effect of the above technical solution is that it has a high degree of automation, and the entire boiler cleaning assembly can regularly detect the ash accumulation height in the settling chamber and automatically blow and remove the ash according to the ash accumulation height in the settling chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the boiler ash cleaning assembly described in Example 1 of the utility model;

[0023] Figure 2 This is a schematic structural diagram of a boiler ash cleaning assembly according to Embodiment 2 of the present utility model;

[0024] Figure 3 This is a schematic diagram of the electrical connections of the controller described in Example 2 of the present utility model.

[0025] In the figure: 1 boiler body; 11 settling chamber; 111 purge interface; 112 pressure taking interface; 2 buffer tank; 3 compressed air supply assembly; 4 pressure measuring component; 51 first valve; 52 second valve; 53 third valve; 54 fourth valve; 6 three-way component; 7 controller. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0027] Example 1

[0028] like Figure 1 As shown, this embodiment provides a boiler ash cleaning assembly, including a boiler body 1, a compressed air supply assembly 3 and a pressure measuring device 4, the lower end of the boiler body 1 is a settling chamber 11, the lower end of the settling chamber 11 has an ash discharge port, the side wall of the settling chamber 11 has a purge interface 111 and a pressure taking interface 112 spaced apart from each other, the purge interface 111 is connected to the air outlet of the compressed air supply assembly 3, and a first valve 51 is provided at the connection between the two, the purge interface 111 and the pressure taking interface 112 are both connected to the pressure measuring device 4, and a second valve 52 is provided at the connection between the purge interface 111 and the pressure measuring device 4, and a third valve 53 is provided at the connection between the pressure taking interface 112 and the pressure measuring device 4, so that the first valve and the second valve can be closed, and the third valve can be opened, at which time the pressure measuring device measures the pressure value at the pressure taking interface, and the negative pressure value measured by the pressure measuring device is When the pressure value is significantly reduced, it can be considered that the accumulated dust in the sedimentation chamber has covered the pressure taking interface. At this time, the first valve can be closed and the second valve can be opened. At this time, when the negative pressure measured by the pressure measuring device is normal, it means that the dust accumulation interface in the surface sedimentation chamber is located between the pressure taking interface and the purge interface. If the negative pressure value measured by the pressure measuring device is also significantly reduced, it can be considered that the accumulated dust in the sedimentation chamber has covered the purge interface. In this way, the height of the accumulated dust in the sedimentation chamber can be conveniently known. When it is monitored that the accumulated dust in the sedimentation chamber exceeds the purge interface, the second valve and the third valve can be closed, and the first valve can be opened. Compressed air can be blown into the sedimentation chamber by the compressed air supply assembly to discharge the accumulated dust in the sedimentation chamber (the way to detect whether the accumulated dust is discharged is to close the first valve and the second valve, open the third valve and observe whether the negative pressure of the pressure measuring device is normal. If it is normal, it means that the accumulated dust is discharged. If it is still abnormal, it means that the accumulated dust still covers the pressure taking interface).

[0029] The above technical solution also includes a tee piece 6, and the pressure taking interface 112 and the purge interface 111 are both connected to the pressure measuring device 4 through the tee piece 6. Its structure is simple, and the pressure measuring device is shared by the pressure taking interface and the purge interface to roughly judge the height of dust accumulation in the sedimentation chamber.

[0030] In the above technical solution, a fourth valve 54 is provided at the connection point between the three-way piece 6 and the pressure measuring piece 4, so that when the pressure measuring piece is damaged and needs maintenance or replacement, the fourth valve can be closed to avoid pressure leakage in the sedimentation chamber.

[0031] The purge interface 111 in the above technical solution is arranged to be tilted upward, so that when the first valve is opened, the purge interface is directly purged obliquely downward to facilitate the discharge of the accumulated dust in the settling chamber.

[0032] In the above technical solution, the angle between the purge interface 111 and the horizontal plane is α, wherein α is 30-60°, preferably, α is 45°, which has a simple structure and a good downward purge effect.

[0033] The compressed air supply assembly 3 described in the above technical solution is an air compressor with a simple structure. In this embodiment, the flue gas in the furnace of the boiler (waste heat boiler) is under negative pressure under normal circumstances. Two pressure monitoring points (i.e., pressure-taking interface and purge interface) are set at different heights above the boiler feeder (i.e., sedimentation chamber). After dust accumulates in the sedimentation chamber, the pressure-taking interface is blocked. At this time, the negative pressure value at the pressure-taking interface will become smaller. Similarly, after the purge is blocked by dust accumulation, the negative pressure value of the purge interface will also become smaller. At this time, the dust accumulation level in the sedimentation chamber can be judged according to the pressure changes of the two pressure monitoring points. In this way, the dust blockage in the boiler sedimentation chamber can be predicted in advance, and timely measures can be taken to avoid more serious accidents.

[0034] Example 2

[0035] like Figure 2 As shown, the same as Example 1, the difference is that the above technical solution also includes a buffer tank 2, and the purge interface 111 is connected with the compressed air supply assembly 3 and the pressure measuring device 4 through the buffer tank 2, so that the compressed air can be prevented from being directly sprayed into the sedimentation chamber and affecting the safe operation of the boiler. The buffer tank 2 has three interfaces 21, one of which is connected with the purge interface 111, and the remaining two interfaces 21 are respectively connected with the compressed air supply assembly 3 and the pressure measuring device 4, and the first valve 51 is provided at the connection between the buffer tank 2 and the compressed air supply assembly 3, and the second valve 52 is provided at the connection between the buffer tank 2 and the pressure measuring device 4, and the structure is simple.

[0036] Among them, the interface on the buffer tank connected to the purge interface is located at the lower end of the buffer tank, and the remaining two interfaces are located at the upper end of the buffer tank.

[0037] Example 3

[0038] like Figure 3As shown, the above technical solution also includes a controller 7, the pressure measuring device 4 is a pressure sensor, the first valve 51, the second valve 52 and the third valve 53 are all solenoid valves, the pressure measuring device 4, the first valve 51, the second valve 52, the third valve 53 and the compressed air supply assembly 3 are all electrically connected to the controller 7, so that the automation level is high, and the entire boiler ash cleaning assembly can regularly detect the ash accumulation height in the settling chamber, and automatically purge and remove ash according to the ash accumulation height in the settling chamber. In this embodiment, the controller can be an arm series single chip microcomputer or a DSC controller (the controller can be set in a control cabinet next to the boiler). In this embodiment, the controller can control the first valve and the second valve to be closed in the initial state, and the third valve, so that when there is ash accumulation in the settling chamber that blocks the ash discharge port, the ash accumulation will gradually increase until the pressure interface is completely covered, so that the negative pressure sensed by the pressure measuring device decreases, and the controller assumes that the pressure interface is covered, and then the controller controls the first valve and the third valve to be closed, and then opens the second valve, and the pressure at the purge interface is detected by the pressure measuring device. If the pressure at the purge interface is If the pressure is normal, the purge interface is not covered, and if the negative pressure value of the purge interface decreases, it is covered. At this time, the controller controls the second valve and the third valve to close, and controls the first valve to open and the compressed air supply assembly to start running, and blow compressed air into the settling chamber, so that the ash accumulated in the settling chamber is boiling and the ash discharge port is unblocked. The running time of the compressed air supply assembly can be set by the controller, such as 3-5 minutes, and then the controller can control the compressed air assembly to stop running and close the first valve. At this time, the controller can continue to close the first valve and the second valve, and open the third valve, and repeat the above operations.

[0039] The pressure taking interface and the purge interface in this embodiment share a pressure measuring component, which has a simple structure and low operating cost.

[0040] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A boiler cleaning assembly, characterized in that: The invention comprises a boiler body (1), a compressed air supply assembly (3) and a pressure measuring device (4); the lower end of the boiler body (1) is a settling chamber (11); the lower end of the settling chamber (11) is provided with an ash discharge port; the side wall of the settling chamber (11) is provided with a purge interface (111) and a pressure taking interface (112) which are spaced apart from each other; the purge interface (111) is connected to the air outlet of the compressed air supply assembly (3); a first valve (51) is provided at the connection point between the two; the purge interface (111) and the pressure taking interface (112) are both connected to the pressure measuring device (4); a second valve (52) is provided at the connection point between the purge interface (111) and the pressure measuring device (4); a third valve (53) is provided at the connection point between the pressure taking interface (112) and the pressure measuring device (4).

2. The boiler cleaning assembly according to claim 1, characterized in that: It also comprises a three-way piece (6), and the pressure taking interface (112) and the purge interface (111) are both connected to the pressure measuring element (4) through the three-way piece (6).

3. The boiler cleaning assembly according to claim 2, characterized in that: A fourth valve (54) is provided at the connection point between the three-way piece (6) and the pressure measuring piece (4).

4. The boiler cleaning assembly according to claim 1, characterized in that: The purge interface (111) is arranged tilted upward.

5. The boiler cleaning assembly according to claim 4, characterized in that: The included angle between the purge interface (111) and the horizontal plane is 30-60°.

6. The boiler cleaning assembly according to claim 1, characterized in that: It also comprises a buffer tank (2), and the purge interface (111) is connected to the compressed air supply assembly (3) and the pressure measuring device (4) through the buffer tank (2).

7. The boiler cleaning assembly according to claim 6, characterized in that: The buffer tank (2) has three interfaces (21), one of which is connected to the purge interface (111), and the remaining two interfaces (21) are respectively connected to the compressed air supply assembly (3) and the pressure measuring device (4); the first valve (51) is provided at the connection point between the buffer tank (2) and the compressed air supply assembly (3), and the second valve (52) is provided at the connection point between the buffer tank (2) and the pressure measuring device (4).

8. The boiler cleaning assembly according to claim 1, characterized in that: The compressed air supply assembly (3) is an air compressor.

9. The boiler cleaning assembly according to claim 1, characterized in that: The invention also comprises a controller (7), the pressure measuring element (4) is a pressure sensor, the first valve (51), the second valve (52) and the third valve (53) are solenoid valves, and the pressure measuring element (4), the first valve (51), the second valve (52), the third valve (53) and the compressed air supply assembly (3) are all electrically connected to the controller (7).

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