Blowing device and filter with same

Abstract

The utility model provides a blowing device and a filter with the same, the blowing device comprises: a blowing pipe comprising a main pipe and a plurality of branch pipes communicated with the main pipe, the main pipe is communicated with an air source, the plurality of branch pipes are communicated with a plurality of filter bags in one-to-one correspondence; the fixing assembly comprises a fixing seat and a pressing plate, the pressing plate covers the fixing seat, a plurality of mounting grooves are formed between the fixing seat and the pressing plate, and the branch pipes are arranged in the mounting grooves in a penetrating mode in a one-to-one correspondence mode. According to the technical scheme provided by the invention, the problem that the filter bag in the related technology cannot effectively blow can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, in particular to a spraying device and a filter having the same. Background Art

[0002] Dry pulverized coal pressurized gasification technology uses dry pulverized coal as raw material and pure oxygen and steam as gasification agents to achieve pressurized gasification. The coal gasification unit adopts dry pulverized coal pressurized gasification quenching technology, which mainly includes eight processes: pulverized coal pressurized transportation, gasification, slag removal, synthesis gas washing, black water flash evaporation, black water treatment, gasification medium supply and public works.

[0003] The dust collector is used in the process of pressurized coal conveying. Its main function is to filter the coal powder in the exhaust gas to make the dust concentration ≤20mg / m 3 After that, it is discharged into the atmosphere through the exhaust pipe. As the core component of the dust collector, the service life of the filter bag directly affects the long-term stable operation and environmental protection of the coal powder bin filter. After the filter bag filters the coal powder in the exhaust gas, some coal powder will remain on the surface of the filter bag, affecting its use. It is necessary to use a blowing system to blow the filter bag to remove the attached coal powder.

[0004] At present, the low-pressure coal powder silo filter injection system uses 0.7MPa low-pressure nitrogen as the injection gas source. However, due to the high pressure and large fluctuation of the injection gas, long-term operation will cause severe vibration of the injection pipe, making it impossible to effectively inject the filter bag. Utility Model Content

[0005] The utility model provides a spraying device and a filter having the same, so as to solve the problem that the filter bag in the related art cannot be effectively sprayed.

[0006] According to one aspect of the utility model, a blowing device is provided, which includes: a blowing pipe, including a main pipe and a plurality of branch pipes connected to the main pipe, the main pipe is connected to an air source, and the plurality of branch pipes are connected to a plurality of filter bags in a one-to-one correspondence; a fixing assembly, including a fixing seat and a pressure plate, the pressure plate cover is arranged on the fixing seat, a plurality of installation grooves are provided between the fixing seat and the pressure plate, and the plurality of branch pipes are passed through the plurality of installation grooves in a one-to-one correspondence.

[0007] Furthermore, a plurality of mounting grooves are arranged on a side of the fixing seat facing the pressing plate, and the plurality of mounting grooves are arranged at intervals along the length direction of the fixing seat, and the lower surface of the pressing plate abuts against the plurality of branch pipes respectively.

[0008] Further, the ratio between the depth of the installation groove and the diameter of the branch pipe is between 0.25 and 0.75.

[0009] Furthermore, the fixing assembly also includes a plurality of connecting bolts. Connecting bolts are provided on both sides of each mounting groove, and both ends of the connecting bolts are respectively connected to the fixing seat and the pressure plate.

[0010] Furthermore, the blowing device also includes a buffer tank arranged on the main pipe.

[0011] Furthermore, the blowing device also includes multiple stop valves and multiple metal pipes, the inlets of the multiple stop valves are connected to the multiple outlets of the main pipe one by one, the multiple metal pipes are arranged at the outlets of the multiple stop valves one by one, and the multiple metal pipes are connected to the multiple branch pipes one by one.

[0012] Furthermore, a first flange and a second flange are respectively provided at both ends of the metal pipe, the first flange is connected to the outlet of the stop valve, and the second flange is connected to the inlet of the branch pipe.

[0013] According to another aspect of the utility model, a filter is provided, comprising: a shell, in which a plurality of filter bags are arranged; a blowing device, in which a plurality of branch pipes of the blowing device are connected to the plurality of filter bags one by one, and the blowing device is the blowing device provided above.

[0014] Furthermore, the filter also includes an air venting pipe and a flow guide pipe, the inlet of the air venting pipe is communicated with the shell, and the inlet of the flow guide pipe is communicated with the air venting pipe.

[0015] Furthermore, a fixing seat of the blowing device is arranged on the shell.

[0016] By applying the technical solution of the utility model, the blowing device includes a blowing pipe and a fixing assembly, and the nitrogen in the gas source can be transported to a plurality of branch pipes through the main pipe, and the branch pipes are used to blow the filter bags corresponding thereto, so that the coal powder on the surface of the filter bags falls off. Since the branch pipes are inserted into the mounting grooves between the fixing seat and the pressing plate, the fixing seat and the pressing plate can be used to fix the branch pipes, so as to avoid the vibration of the branch pipes due to the impact of the high-pressure nitrogen, so as to make the branch pipes more stably connected to the filter bags, and effectively blow the filter bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a spraying device provided according to an embodiment of the utility model is shown;

[0019] Figure 2 A schematic diagram of the structure of a fixing assembly of a blowing device provided according to an embodiment of the utility model is shown;

[0020] Figure 3 A schematic structural diagram of a metal tube of a blowing device provided according to an embodiment of the utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 1. Filter bag;

[0023] 10. Blowing pipe; 11. Main pipe; 12. Branch pipe;

[0024] 20. Fixing assembly; 21. Fixing seat; 22. Pressing plate; 23. Mounting slot; 24. Connecting bolt;

[0025] 30. Buffer tank;

[0026] 40. Stop valve;

[0027] 50. metal pipe; 51. first flange; 52. second flange;

[0028] 60. Vent pipe; 61. Flow guide pipe. DETAILED DESCRIPTION

[0029] 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] like Figures 1 to 3 As shown, an embodiment of the utility model provides a blowing device, which includes a blowing pipe 10 and a fixing assembly 20. The blowing pipe 10 includes a main pipe 11 and a plurality of branch pipes 12 connected to the main pipe 11. The main pipe 11 is connected to an air source, and the plurality of branch pipes 12 are connected to a plurality of filter bags 1 in a one-to-one correspondence. The fixing assembly 20 includes a fixing seat 21 and a pressing plate 22. The pressing plate 22 is covered on the fixing seat 21. A plurality of mounting grooves 23 are provided between the fixing seat 21 and the pressing plate 22. The plurality of branch pipes 12 are passed through the plurality of mounting grooves 23 in a one-to-one correspondence.

[0031] By applying the technical solution of the utility model, the blowing device includes a blowing pipe and a fixing assembly, and the nitrogen in the gas source can be transported to the plurality of branch pipes 12 through the main pipe 11, and the branch pipes 12 are used to blow the corresponding filter bags 1 to make the coal powder on the surface of the filter bags 1 fall off. Since the branch pipes 12 are inserted into the mounting groove between the fixing seat 21 and the pressing plate 22, the fixing seat 21 and the pressing plate 22 can be used to fix the branch pipes 12, so as to avoid the vibration of the branch pipes 12 due to the impact of the high-pressure nitrogen, so as to make it more stably connected with the filter bag 1, and effectively blow the filter bag 1.

[0032] It should be noted that the gas source uses high-pressure nitrogen, which has the advantage of high safety.

[0033] In the related art, the branch pipe 12 is fixed by bundling with clamps. Due to the high pressure of nitrogen, the rubber hose and the bundled clamps may become detached after long-term operation, and the filter bag 1 may vibrate violently and cannot be cleaned and blown, resulting in failure of the blowing.

[0034] like Figure 1 and Figure 2 As shown, a plurality of mounting grooves 23 are arranged on one side of the fixing seat 21 facing the pressing plate 22, and the plurality of mounting grooves 23 are arranged at intervals along the length direction of the fixing seat 21, and the lower surface of the pressing plate 22 abuts against the plurality of branch pipes 12 respectively. With the above arrangement, the mounting grooves 23 are arranged on the fixing seat 21, and only the fixing seat 21 needs to be processed, which can reduce the processing cost.

[0035] In this embodiment, the branch pipe 12 can be pressed into the installation groove 23 by using the pressing plate 22 , so that the branch pipe 12 is limited by using the installation groove 23 , and the branch pipe 12 is fixed by using the pressing plate 22 .

[0036] Specifically, the ratio between the depth of the installation groove 23 and the diameter of the branch pipe 12 is between 0.25 and 0.75. With the above ratio range, the installation groove 23 can have a strong positioning effect on the branch pipe 12, thereby preventing the branch pipe 12 from vibrating.

[0037] The ratio between the depth of the installation groove 23 and the diameter of the branch pipe 12 may be 0.25, 0.5, 0.75, or any value between 0.25 and 0.75.

[0038] In this embodiment, the shape of the mounting groove 23 is similar to that of the branch pipe 12 , which is conducive to good fixing of the branch pipe 12 .

[0039] like Figure 2As shown, the fixing assembly 20 further includes a plurality of connecting bolts 24, and connecting bolts 24 are provided on both sides of each mounting groove 23, and the two ends of the connecting bolts 24 are respectively connected to the fixing seat 21 and the pressing plate 22. The connecting bolts 24 provided in the above manner can enhance the connection strength between the fixing seat 21 and the pressing plate 22, thereby making the connection between the two more stable, so that the branch pipe 12 is fixed more firmly.

[0040] like Figure 1 As shown, the blowing device also includes a buffer tank 30 disposed on the main pipe 11. The buffer tank 30 can be used to store nitrogen in the main pipe 11. When the nitrogen flows out of the buffer tank 30, the pressure of the nitrogen is more stable to avoid impact on the branch pipe 12, thereby avoiding vibration of the branch pipe 12.

[0041] In this embodiment, a switch valve is provided downstream of the buffer tank 30 to prevent the buffer tank 30 from being short of gas supply in a short period of time, causing pressure rise in the pulverized coal bin, damage to the explosion-proof plate and leakage of pulverized coal.

[0042] like Figure 1 and Figure 2 As shown, the blowing device also includes a plurality of stop valves 40 and a plurality of metal pipes 50. The inlets of the plurality of stop valves 40 are connected to the plurality of outlets of the main pipe 11 in a one-to-one correspondence. The plurality of metal pipes 50 are arranged at the outlets of the plurality of stop valves 40 in a one-to-one correspondence. The plurality of metal pipes 50 are connected to the plurality of branch pipes 12 in a one-to-one correspondence. By using the stop valve 40, the connection state of the branch pipe 12 and the main pipe 11 can be controlled, thereby controlling the flow state of the nitrogen. By using the metal pipe 50, the outlet of the stop valve 40 and the branch pipe 12 can be connected, thereby directing the nitrogen to the filter bag 1.

[0043] In the related art, the connecting pipe between the branch pipe 12 and the stop valve 40 is a hose made of plastic. Since nitrogen is a high-pressure gas, the hose is prone to vibration under the impact of high-pressure nitrogen and is loose from the filter bag, thereby failing to effectively spray the filter bag 1, and the coal powder on the surface of the filter bag 1 cannot fall off, resulting in clogging of the filter bag 1. The metal pipe 50 of this embodiment is rigidly connected to the hose, and is not easy to be loosened from the filter bag 1, thereby improving its stability.

[0044] like Figure 1 and Figure 3 As shown, a first flange 51 and a second flange 52 are respectively provided at both ends of the metal pipe 50, the first flange 51 is connected to the outlet of the stop valve 40, and the second flange 52 is connected to the inlet of the branch pipe 12. The first flange 51 and the second flange 52 are used to connect the metal pipe 50 to the stop valve 40 and the branch pipe 12, which has the advantages of a stable connection structure and is not easy to loosen.

[0045] Another embodiment of the utility model provides a filter, the filter includes a shell and a blowing device, a plurality of filter bags 1 are arranged in the shell; a plurality of branch pipes 12 of the blowing device are connected to the plurality of filter bags 1 one by one, and the blowing device is the blowing device provided above. With the above filter, the nitrogen in the gas source can be transported to the plurality of branch pipes 12 through the main pipe 11, and the branch pipes 12 are used to blow the corresponding filter bags 1 to make the coal powder on the surface of the filter bags 1 fall off. Since the branch pipes 12 are inserted into the installation groove between the fixing seat 21 and the pressing plate 22, the fixing seat 21 and the pressing plate 22 can be used to fix the branch pipes 12 to avoid vibration of the branch pipes 12 due to the impact of high-pressure nitrogen, so that the branch pipes 12 can be more stably connected to the filter bags 1, and the filter bags 1 can be effectively blown.

[0046] like Figure 1 As shown, the filter further includes a vent pipe 60 and a flow guide pipe 61, the inlet of the vent pipe 60 is connected to the housing, and the inlet of the flow guide pipe 61 is connected to the vent pipe 60. The vent pipe 60 can be used to discharge gas from the housing of the filter. The flow guide pipe 61 can be used to guide condensed water in the vent pipe 60 to prevent the condensed water from flowing back into the housing and causing coal powder agglomeration on the filter bag 1.

[0047] It should be noted that, due to the low ambient temperature in winter, the temperature difference between the inside and outside of the filter housing is large, and the vent pipe 60 will produce condensed water under the effect of the temperature difference. The condensed water will flow back into the housing, causing the coal powder on the filter bag 1 to agglomerate, thereby blocking the filter bag 1 and reducing the service life of the filter bag 1. The guide pipe 61 can be used to guide the condensed water out of the vent pipe 60, thereby preventing the condensed water from flowing back.

[0048] In this embodiment, the fixing seat 21 of the blowing device is arranged on the housing. By arranging the fixing seat 21 on the housing, it has the advantages of simple structure and convenient operation.

[0049] The application of the spraying device provided in this application has the following beneficial effects:

[0050] 1. By setting up a buffer tank 30, high-pressure nitrogen passes through the buffer tank 30 and enters the filter bag 1, which can provide a stable gas source, avoid the situation of insufficient gas supply in a short period of time, pressure increase in the coal powder bin, and leakage of coal powder due to damage of the explosion-proof plate, etc., which not only maintains the pressure stability of the injection system but also saves the waste of low-pressure nitrogen resources;

[0051] 2. The stop valve 40 and the branch pipe 12 are connected by a first flange 51 and a second flange 52 arranged on a metal pipe 50, which has the advantages of strong sealing, high flexibility, good shock absorption, high pressure and low temperature resistance, corrosion resistance, easy replacement and maintenance, etc. At the same time, it not only prevents the blowing pipe from loosening and disengaging due to long-term vibration, thereby causing the blowing failure, and the dust accumulation in the filter bag seriously affects the filtering effect, but also reduces the difficulty of disassembly and assembly, facilitates the inspection and replacement of the filter bag, and improves the installation and maintenance efficiency of the blowing system;

[0052] 3. By installing a guide pipe 61 on the vent pipe 60 of the coal powder bin filter, condensed water can be discharged in time, avoiding the filter bag from being damaged, falling off and blocked due to coal powder compaction. It also effectively ensures that the dust is discharged in an environmentally friendly manner while extending the service life of the filter bag.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0058] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A blowing device, characterized in that: The blowing device comprises: The blowing pipe (10) comprises a main pipe (11) and a plurality of branch pipes (12) connected to the main pipe (11), wherein the main pipe (11) is connected to an air source, and the plurality of branch pipes (12) are connected to a plurality of filter bags (1) in a one-to-one correspondence; The fixing assembly (20) comprises a fixing seat (21) and a pressing plate (22), wherein the pressing plate (22) is covered on the fixing seat (21), a plurality of mounting grooves (23) are provided between the fixing seat (21) and the pressing plate (22), and a plurality of branch pipes (12) are passed through the plurality of mounting grooves (23) in a one-to-one correspondence.

2. The blowing device according to claim 1, characterized in that: The plurality of mounting grooves (23) are arranged on a side of the fixing seat (21) facing the pressing plate (22), and the plurality of mounting grooves (23) are arranged at intervals along the length direction of the fixing seat (21), and the lower surface of the pressing plate (22) abuts against the plurality of branch pipes (12) respectively.

3. The blowing device according to claim 1, characterized in that: The ratio between the depth of the installation groove (23) and the diameter of the branch pipe (12) is between 0.25 and 0.

75.

4. The blowing device according to claim 1, characterized in that: The fixing assembly (20) further comprises a plurality of connecting bolts (24), each of the two sides of the mounting groove (23) being provided with the connecting bolts (24), and the two ends of the connecting bolts (24) are respectively connected to the fixing seat (21) and the pressing plate (22).

5. The blowing device according to claim 1, characterized in that: The spraying device further comprises a buffer tank (30) arranged on the main pipe (11).

6. The blowing device according to any one of claims 1 to 5, characterized in that: The blowing device further comprises a plurality of stop valves (40) and a plurality of metal pipes (50), wherein the inlets of the plurality of stop valves (40) are connected one-to-one with the plurality of outlets of the main pipe (11), the plurality of metal pipes (50) are arranged one-to-one at the outlets of the plurality of stop valves (40), and the plurality of metal pipes (50) are connected one-to-one with the plurality of branch pipes (12).

7. The blowing device according to claim 6, characterized in that: A first flange (51) and a second flange (52) are respectively provided at both ends of the metal pipe (50); the first flange (51) is connected to the outlet of the stop valve (40), and the second flange (52) is connected to the inlet of the branch pipe (12).

8. A filter, characterized in that: The filters include: A housing, wherein a plurality of filter bags (1) are arranged in the housing; A blowing device, wherein the plurality of branch pipes (12) of the blowing device are connected to the plurality of filter bags (1) in a one-to-one correspondence, and the blowing device is the blowing device according to any one of claims 1 to 7.

9. The filter according to claim 8, characterized in that The filter further comprises an air venting pipe (60) and a flow guide pipe (61), wherein the inlet of the air venting pipe (60) is in communication with the housing, and the inlet of the flow guide pipe (61) is in communication with the air venting pipe (60).

10. The filter according to claim 8, characterized in that The fixing seat (21) of the blowing device is arranged on the shell.

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