Fire-fighting spraying system for wet-type electrostatic dust collector

Abstract

The utility model discloses a fire-fighting spraying system for a wet-type electrostatic dust collector, which solves the problem of insufficient fire extinguishing capacity of the wet-type electrostatic dust collector in the prior art, has the beneficial effect of effectively preventing and treating fire accidents, and adopts the specific scheme that the fire-fighting spraying system for the wet-type electrostatic dust collector comprises a spraying main pipe, the spraying main pipes penetrate through a tower body of the wet type electrostatic dust collector, the ends, located on the outer side of the tower body, of the spraying main pipes are connected with a fire fighting water device, the spraying main pipes are higher than a demister in the tower body, and the spraying main pipes are arranged in the annular direction of the inner side of the tower body, or the multiple spraying main pipes are arranged in the tower body and provided with first nozzles. The first nozzles are mounted at the bottom and the side part of the spraying main pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial environmental protection, in particular to a fire sprinkler system for a wet electrostatic precipitator. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Wet electrostatic precipitator is a widely used flue gas dust removal equipment in the environmental protection industry. However, during the operation and maintenance of the project, fire accidents often occur. Because the wall panels of the precipitator are usually made of glass fiber reinforced plastic flakes for corrosion protection, and the anode tube is made of conductive glass fiber reinforced plastic, both of which are flammable materials, if there is an open flame during the maintenance process, it is very easy to cause a fire. Such fire accidents occur frequently, causing serious property losses and personal injuries. How to prevent and control such fire accidents and minimize economic losses is one of the urgent problems facing the industry.

[0004] In order to prevent the occurrence of fire accidents during maintenance, existing projects usually install fire hydrants on the platform outside the tower and connect the fire water from the factory area as a preventive measure, or use the anode tube flushing system in the tower as a backup fire sprinkler fire extinguishing measure. The inventor found that the fire hydrants on the tower are placed outside the tower and need to be connected to the fire hose. The fire extinguishing area has limitations and is difficult to operate. The anode tube flushing system in the tower of the wet electrostatic precipitator usually uses an atomizing flushing nozzle with a small water volume and poor fire extinguishing performance, which affects the safety of equipment operation and maintenance. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a fire sprinkler system for a wet electrostatic precipitator, which can effectively prevent and control fire accidents, reduce casualties and economic and property losses, and improve the safety and reliability of equipment operation and maintenance.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A fire sprinkler system for a wet electrostatic precipitator comprises a spray main pipe, the spray main pipe is arranged through a tower body of the wet electrostatic precipitator, one end of the spray main pipe located outside the tower body is connected to a fire water device, the spray main pipe is arranged higher than a demister in the tower body, when the tower body diameter of the wet electrostatic precipitator is less than or equal to 6m, the spray main pipe is annular along the inner side of the tower body, or, when the tower body diameter of the wet electrostatic precipitator is greater than 6m, the spray main pipe comprises a plurality of pipes, each of which is connected to a plurality of spray branch pipes respectively, the spray main pipe is provided with a first nozzle, and the first nozzle is installed at the bottom and side of the spray main pipe.

[0008] In the fire sprinkler system as described above, the sprinkler main pipe is connected to the fire water device instead of being connected to the water balance device of the wet electrostatic precipitator cleaning system. The water demand of the fire sprinkler system is guaranteed by the fire water device. The sprinkler main pipe can be installed in a ring shape in the tower body or multiple sprinkler main pipes can be installed in the tower body. In case of fire, water is sprayed through the first nozzle of the sprinkler main pipe to extinguish the fire.

[0009] As described above, in a fire sprinkler system for a wet electrostatic precipitator, when the diameter of the tower body is relatively small, it is not necessary to set more first nozzles to ensure the spraying range of the first nozzle. When the spray main pipe is annular along the inner side of the tower body, the coverage rate of the first nozzle is greater than or equal to 200% of the cross-sectional area of ​​the tower body, ensuring that there is no dead angle in the tower body during spraying.

[0010] The water spray volume of the first nozzle is 2.7-6m 3 / h.

[0011] In the fire sprinkler system for a wet electrostatic precipitator as described above, the sprinkler main pipe is a polygonal structure, so that each side adopts a straight pipe, which not only ensures that the first nozzle is arranged close to the inner wall of the tower body, but also facilitates the production of the sprinkler main pipe.

[0012] A fire sprinkler system for a wet electrostatic precipitator as described above, wherein the sprinkler main pipe is supported by a plurality of brackets, and a distance is set between two adjacent brackets, and the brackets are fixed to the inner wall of the tower body;

[0013] The spray main pipe is fixed to the surface of the bracket through a connecting piece, and the spray main pipe is effectively supported by the bracket, and the bracket is fixed to the inner wall of the tower body.

[0014] A fire sprinkler system for a wet electrostatic precipitator as described above, when the tower diameter of the wet electrostatic precipitator is greater than 6m, each of the spray branches is provided with a plurality of second nozzles, and the second nozzles are installed at the bottom and side of the spray branch;

[0015] The total coverage of the first nozzle and the second nozzle is greater than or equal to 200% of the cross-sectional area of ​​the tower body;

[0016] The water spray volume of the first nozzle is 2.7-6m 3 / h, the water spraying amount of the second nozzle is less than or equal to the water spraying amount of the first nozzle.

[0017] In the fire sprinkler system for a wet electrostatic precipitator as described above, a plurality of the spray main pipes are arranged in parallel with each other, and the spray branch pipes are vertically connected to the spray main pipes connected thereto. Through the arrangement of the spray branch pipes and the spray main pipes, the number of the first nozzle and the second nozzle arranged in the cross section of the tower body is effectively guaranteed.

[0018] In the fire sprinkler system for a wet electrostatic precipitator as described above, the number of the sprinkler branches on one side of the sprinkler main pipe is greater than the number of the sprinkler branches on the other side.

[0019] A fire sprinkler system for a wet electrostatic precipitator as described above, wherein the sprinkler main pipe is fixed to the top of the tower body through a plurality of first hangers, and a distance is set between two adjacent first hangers;

[0020] The spray branch pipe is fixed to the top of the tower body through a plurality of second hangers, and two adjacent second hangers are arranged at a distance.

[0021] In the fire sprinkler system for a wet electrostatic precipitator as described above, the first hanger is a U-shaped hanger, the top of the U-shaped hanger is fixedly connected to the top of the tower body, the water flow of the sprinkler main pipe is large, and the U-shaped hanger can ensure stable support for the sprinkler main pipe;

[0022] The spray main pipe is fixed to the first hanger through a connecting piece.

[0023] In the fire sprinkler system for a wet electrostatic precipitator as described above, the second hanger is an L-shaped hanger, and the top of the L-shaped hanger is fixedly connected to the top of the tower body;

[0024] The spray branch pipe is fixed to the second hanger through a connecting piece.

[0025] The beneficial effects of the above utility model are as follows:

[0026] 1) In the fire sprinkler system provided by the utility model, the sprinkler main pipe is connected to the fire water device instead of being connected to the water balance device of the wet electrostatic precipitator cleaning system. The water demand of the fire sprinkler system is guaranteed by the fire water device. The sprinkler main pipe can be installed in the tower body in a circular direction or multiple sprinkler main pipes can be installed in the tower body. In case of fire, water is sprayed through the first nozzle of the sprinkler main pipe and the second nozzle of the sprinkler branch pipe to extinguish the fire. The effective coverage of the first nozzle and the second nozzle is guaranteed, the operation is convenient, the fire extinguishing performance is good, and the operation and maintenance safety performance of the wet electrostatic precipitator are effectively improved.

[0027] 2) When the diameter of the tower body is relatively small, the utility model can meet the fire extinguishing needs in the tower body by setting an annular spray pipe and cooperating with the first nozzles set at the bottom and side of the spray pipe. The structural setting is simple and reasonable. At this time, the spray pipe is fixed to the inner wall of the tower body by a bracket, which is convenient for installation.

[0028] 3) In the utility model, when the diameter of the tower body is large, multiple sprinkler main pipes are arranged, and the sprinkler main pipes are connected to multiple sprinkler branch pipes, so that the coverage of the first nozzle and the second nozzle on the cross section of the tower body can be guaranteed to meet the fire extinguishing requirements.

[0029] 4) In the utility model, when the diameter of the tower body is large, the spray main pipe is supported by a U-shaped hanger, and the spray branch pipe is supported by an L-shaped hanger, which can ensure reliable and stable support for the spray main pipe and the spray branch pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative 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.

[0031] Figure 1 It is a schematic diagram of the arrangement of a ring-shaped sprinkler pipe in a tower body in a fire sprinkler system for a wet electrostatic precipitator in Example 1 of the utility model.

[0032] Figure 2 It is a schematic diagram of a bracket supporting a spray main pipe in a fire sprinkler system for a wet electrostatic precipitator in Embodiment 1 of the present utility model.

[0033] Figure 3 It is a schematic diagram of a sprinkler branch pipe arranged on a sprinkler main pipe in a fire sprinkler system for a wet electrostatic precipitator in Embodiment 2 of the present utility model.

[0034] Figure 4 It is a schematic diagram of a first hanger supporting a sprinkler main pipe in a fire sprinkler system for a wet electrostatic precipitator in Embodiment 2 of the present utility model.

[0035] Figure 5 It is a schematic diagram of a second hanger supporting a spray branch pipe in a fire sprinkler system for a wet electrostatic precipitator in Embodiment 2 of the present utility model.

[0036] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0037] Among them: 1. Spray main pipe, 2. First nozzle, 3. Water pump, 4. Main pipe, 5. Bracket; 6. Spray branch pipe, 7. Second nozzle, 8. U-shaped hanger, 9. L-shaped hanger. DETAILED DESCRIPTION

[0038] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0039] 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 invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations;

[0040] As introduced in the background technology, the cleaning system of the wet electrostatic precipitator in the prior art cannot meet the problem of fire extinguishing requirements. In order to solve the above technical problems, the utility model proposes a fire sprinkler system for a wet electrostatic precipitator.

[0041] In a typical embodiment of the utility model, a fire sprinkler system for a wet electrostatic precipitator includes a spray main pipe, the spray main pipe is arranged through a tower body of the wet electrostatic precipitator, one end of the spray main pipe located on the outside of the tower body is connected to a fire water device, the spray main pipe is arranged higher than a demister in the tower body, the spray main pipe is arranged circumferentially along the inner side of the tower body, or multiple spray main pipes are arranged in the tower body, the spray main pipe is provided with a first nozzle, and the first nozzle is installed at the bottom and side of the spray main pipe.

[0042] Embodiment 1

[0043] When the diameter of the tower body is relatively small, it is not necessary to set more first nozzles to ensure the spray range of the first nozzle 2. When the tower body diameter of the wet electrostatic precipitator is less than or equal to 6m, refer to Figure 1 As shown, the spray main pipe is annular along the inner side of the tower body;

[0044] In addition, the coverage rate of the first nozzle 2 is greater than or equal to 200% of the cross-sectional area of ​​the tower body, ensuring that there is no dead angle in the tower body during spraying. In this way, the first nozzle located at the bottom and side of the spray main pipe 1 can achieve full coverage of the spray range of the cross-sectional area of ​​the tower body, meeting the use requirements;

[0045] Specifically, the central axis of the first nozzle at the bottom of the spray main pipe 1 can be perpendicular to the horizontal plane, the central axis of the first nozzle on the side of the spray main pipe 1 is perpendicular to the central axis of the first nozzle at the bottom, or the central axis of the first nozzle on the side of the spray main pipe 1 intersects with the central axis of the first nozzle at the bottom, and the angle between the two is 60-90°, so that the spray range of the first nozzle on the side effectively covers the center of the tower body.

[0046] In some examples, the water spray volume of the first nozzle 2 is 2.7-6m 3 / h, the first nozzle is a solid cone spiral nozzle, and the spray main pipe and the first nozzle are made of 2205 stainless steel.

[0047] In this embodiment, the spray main pipe 1 is a polygonal structure, so each side uses a straight pipe, and two adjacent straight pipes are connected by a bend pipe. This not only ensures that the first nozzle is set close to the inner wall of the tower body to ensure that the spray range of the bottom first nozzle can spray to the inner wall of the tower body, but also facilitates the production of the spray main pipe.

[0048] Considering the support of the spray pipe 1, the spray pipe 1 is supported by multiple brackets 5, and the distance between two adjacent brackets is set, and the bracket 5 is fixed to the inner wall of the tower body; specifically, refer to Figure 2 As shown, the bracket is a right triangle bracket, the width of one side of the bracket 5 connected to the inner wall of the tower body is longer than the width of the other side for supporting the spray pipe 1, the inner side of the bracket is welded to the tower body, and the length of one side of the bracket for contacting the spray pipe 1 is greater than the diameter of the spray pipe 1.

[0049] It is easy to understand that the spray pipe 1 is fixed to the surface of the bracket through a connecting piece, which can be a clamp or a strap supported by other flame retardant materials, tied to the upper side of the bracket, and the spray pipe is effectively supported by the bracket 5, which is fixed to the inner wall of the tower body.

[0050] In the fire sprinkler system provided in the present embodiment, the sprinkler main pipe 1 is connected to the fire water device, which refers to the fire main pipe outside the tower body or the fire hydrant on the tower. The annular sprinkler main pipe 1 is connected to the main pipe 4, which passes through the side wall of the tower body and is specifically connected to the side wall of the tower body in the form of a sleeve flange. The main pipe 4 is provided with a water pump 3. After the water pump 3 is turned on, the fire main pipe supplies water to the sprinkler branch pipe 1 through the main pipe 4. The water demand of the fire sprinkler system is guaranteed by the fire water device. The sprinkler main pipe 1 can be installed in a ring direction in the tower body or multiple sprinkler main pipes can be installed in the tower body. When a fire occurs, water is sprayed through the first nozzle of the sprinkler main pipe to extinguish the fire.

[0051] Embodiment 2

[0052] The difference between this embodiment and the first embodiment is that:

[0053] When the tower diameter of the wet electrostatic precipitator is greater than 6m, refer to Figure 3 As shown, the spray main pipe 1 includes a plurality of pipes, each of which is connected to a plurality of spray branch pipes 6, each of which is provided with a plurality of second nozzles 7. To ensure the spraying range of the second nozzles 7, the second nozzles 7 are installed at the bottom and the side of the spray branch pipe, and the central axis of the second nozzle 7 at the side intersects with the central axis of the second nozzle at the bottom at an acute angle, that is, the opening of the second nozzle at the side is inclined downward;

[0054] It is easy to understand that the first nozzles 2 of the spray main pipe 1 are also located at the bottom and the side of the spray main pipe 1, and the first nozzle openings at the side are also arranged to be inclined downward.

[0055] In this embodiment, the total coverage of the first nozzle 2 and the second nozzle 7 is greater than or equal to 200% of the cross-sectional area of ​​the tower body; the water spraying volume of the first nozzle is 2.7-6m 3 / h, the water spraying amount of the second nozzle is less than or equal to the water spraying amount of the first nozzle, and the first nozzle 2 and the second nozzle 7 are specifically solid cone spiral nozzles.

[0056] The spray main pipes 1 are arranged parallel to each other, and the spray branch pipes 6 are vertically connected to the spray main pipes 1 connected thereto. Through the arrangement of the spray branch pipes 6 and the spray main pipes 1, the number of the first nozzles and the second nozzles arranged in the cross section of the tower body is effectively guaranteed.

[0057] Specifically, two spray main pipes 1 can be provided, and a distance is set between the two spray main pipes. The two spray main pipes are located on both sides of the longitudinal center section of the tower body. Because the areas on both sides of the spray main pipe 1 are different, the number of spray branches on one side of the spray main pipe 1 facing the other spray main pipe 1 is naturally greater than the number of spray branches on the other side, and some spray branches on both sides of the spray main pipe 1 can be placed in the same plane.

[0058] Considering the installation of the spray main pipe 1 and the spray branch pipe 6, the spray main pipe 1 is fixed to the top of the tower body through multiple first hangers, and the interval between two adjacent first hangers is set; the spray branch pipe is fixed to the top of the tower body through multiple second hangers, and the interval between two adjacent second hangers is set; the thickness of the first hanger and the second hanger is 5-30mm.

[0059] refer to Figure 4 As shown, the first hanger is a U-shaped hanger 8, the top of the U-shaped hanger 8 is fixedly connected to the top of the tower body, the water flow of the spray main pipe 1 is large, and the U-shaped hanger 8 can ensure stable support for the spray main pipe, and the length of the bottom side of the U-shaped hanger 8 is greater than the diameter of the spray main pipe;

[0060] refer to Figure 5 As shown, the second hanger is an L-shaped hanger 9, the top of the L-shaped hanger 9 is fixedly connected to the top of the tower body, and the shorter side of the L-shaped hanger is larger than the diameter of the spray branch pipe 6;

[0061] It needs to be explained that the main sprinkler pipe 1 is fixed to the first hanger through a connecting piece, and the branch sprinkler pipe is fixed to the second hanger through a connecting piece; the connecting piece is specifically a clamp or a binding strap.

[0062] 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 fire sprinkler system for a wet electrostatic precipitator, characterized in that: The invention comprises a spray main pipe, which passes through the tower body of the wet electrostatic precipitator. One end of the spray main pipe located on the outside of the tower body is connected to the fire water device. The spray main pipe is higher than the demister in the tower body. When the tower body diameter of the wet electrostatic precipitator is less than or equal to 6m, the spray main pipe is annular along the inner side of the tower body. Alternatively, when the tower body diameter of the wet electrostatic precipitator is greater than 6m, the spray main pipe comprises multiple pipes, each of which is connected to multiple spray branch pipes respectively. The spray main pipe is provided with a first nozzle, which is installed at the bottom and side of the spray main pipe.

2. A fire sprinkler system for a wet electrostatic precipitator according to claim 1, characterized in that: When the spray main pipe is annular along the inner side of the tower body, the coverage rate of the first nozzle is greater than or equal to 200% of the cross-sectional area of ​​the tower body; The water spray volume of the first nozzle is 2.7-6m 3 / h.

3. A fire sprinkler system for a wet electrostatic precipitator according to claim 2, characterized in that: The spray main pipe is a polygonal structure.

4. A fire sprinkler system for a wet electrostatic precipitator according to claim 2, characterized in that: The spray main pipe is supported by multiple brackets, and a distance is set between two adjacent brackets, and the brackets are fixed to the inner wall of the tower body; The spray main pipe is fixed to the surface of the bracket through a connecting piece.

5. A fire sprinkler system for a wet electrostatic precipitator according to claim 1, characterized in that: When the tower diameter of the wet electrostatic precipitator is greater than 6m, each of the spray branches is provided with a plurality of second nozzles, which are installed at the bottom and side of the spray branch; The total coverage of the first nozzle and the second nozzle is greater than or equal to 200% of the cross-sectional area of ​​the tower body; The water spray volume of the first nozzle is 2.7-6m 3 / h, the water spraying amount of the second nozzle is less than or equal to the water spraying amount of the first nozzle.

6. A fire sprinkler system for a wet electrostatic precipitator according to claim 5, characterized in that: The plurality of spray main pipes are arranged in parallel with each other, and the spray branch pipes are vertically connected to the spray main pipes connected thereto.

7. A fire sprinkler system for a wet electrostatic precipitator according to claim 5 or 6, characterized in that: The number of the spray branch pipes on one side of the spray main pipe is greater than the number of the spray branch pipes on the other side.

8. A fire sprinkler system for a wet electrostatic precipitator according to claim 5, characterized in that: The spray main pipe is fixed to the top of the tower body through a plurality of first hangers, and a distance is set between two adjacent first hangers; The spray branch pipe is fixed to the top of the tower body through a plurality of second hangers, and two adjacent second hangers are arranged at a distance.

9. A fire sprinkler system for a wet electrostatic precipitator according to claim 8, characterized in that: The first hanger is a U-shaped hanger, and the top of the U-shaped hanger is fixedly connected to the top of the tower body; The spray main pipe is fixed to the first hanger through a connecting piece.

10. A fire sprinkler system for a wet electrostatic precipitator according to claim 8, characterized in that: The second hanger is an L-shaped hanger, and the top of the L-shaped hanger is fixedly connected to the top of the tower body; The spray branch pipe is fixed to the second hanger through a connecting piece.

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