Fire-fighting device for dry sludge bin

Abstract

The dry sludge bin fire fighting device comprises a limestone powder bin and a spraying frame arranged at the top of the dry sludge bin, the limestone powder bin is connected with the spraying frame through a three-way pipe, the other side of the three-way pipe is connected with an air inlet pipe, and the air inlet pipe is externally connected with a nitrogen leading-in pipe and an air leading-in pipe respectively. The nitrogen leading-in pipe and the air leading-in pipe are respectively provided with a pneumatic control valve, the spraying frame is provided with a nozzle, and the nitrogen leading-in pipe and the air leading-in pipe are respectively and externally connected with a compressed nitrogen bottle and a compressed air bottle. According to the utility model, the nitrogen introduction pipe is combined with the limestone powder bin, compressed nitrogen and limestone powder are fully mixed, introduced to the top of the spraying frame and quickly sprayed into the dry sludge bin through the nozzle, and the limestone powder is used as a carrier to drive the nitrogen to move downwards, so that physical fire extinguishment can be realized, and the working efficiency is improved. In addition, oxygen in the dry sludge bin can be rapidly reduced through nitrogen, so that spontaneous combustion sludge in the bin is suffocated and extinguished, and the fire fighting effect of the dry sludge bin is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of dry sludge treatment, and more specifically to a dry sludge bin fire-fighting device. Background Art

[0002] Municipal and industrial sludge needs to be treated harmlessly. The mainstream process is to dry it and then send it to the boiler for incineration. The dried sludge is stored in a closed dry sludge bin, which will volatilize odorous gases and combustible gases. Under certain temperature and humidity conditions, the sludge in the dry sludge bin will ferment and produce high temperature and combustible gases, posing the risk of spontaneous combustion.

[0003] The existing solution is to install a nitrogen fire-fighting pipe on the top of the dry sludge bin and inject nitrogen into the bin when necessary to suffocate and extinguish the spontaneously combusting sludge in the bin. However, the density of nitrogen is lighter than that of air, and nitrogen is only injected into the bin through a number of air inlet pipes, which makes it difficult to evenly exhaust the air and combustible gas in the bin, and the fire-fighting effect is limited. Utility Model Content

[0004] The utility model provides a dry sludge bin fire-fighting device with good fire-fighting effect, so as to solve the problems that the existing dry sludge bin is prone to spontaneous combustion, resulting in safety accidents and having poor fire-fighting effect.

[0005] According to one aspect of the utility model, a dry sludge bin fire-fighting device is provided, comprising a limestone powder bin and a spraying rack arranged on the top of the dry sludge bin, the limestone powder bin is connected to the spraying rack via a three-way pipe, the other side of the three-way pipe is connected to an air intake pipe, the air intake pipe is respectively externally connected to a nitrogen inlet pipe and an air inlet pipe, the nitrogen inlet pipe and the air inlet pipe are respectively provided with pneumatic control valves, a nozzle is provided on the spraying rack, the nitrogen inlet pipe and the air inlet pipe are respectively externally connected to a compressed nitrogen bottle and a compressed air bottle.

[0006] Preferably, based on the above scheme, the pneumatic control valve comprises an air control valve and a nitrogen control valve, the air control valve is installed on the air inlet pipe, and the nitrogen control valve is installed on the nitrogen inlet pipe.

[0007] Preferably, based on the above solution, an electric air lock is provided between the limestone powder bin and the three-way pipe.

[0008] Preferably, based on the above solution, a fire main pipe is provided between the three-way pipe and the spray rack.

[0009] Preferably, based on the above scheme, a pipeline switching valve is provided on the fire main pipe, and the pipeline switching valve is externally connected to a desulfurization device.

[0010] Preferably, based on the above solution, the spray rack is provided with a plurality of evenly arranged and connected fire branch pipes, and the nozzle is installed at the end of the fire branch pipe.

[0011] Preferably, based on the above scheme, a smoke and temperature alarm is installed in the limestone powder silo.

[0012] The utility model discloses a dry sludge bin fire fighting device, which is combined with a nitrogen introduction pipe and a limestone powder bin, fully mixes compressed nitrogen with limestone powder, introduces the mixture to the top of a spraying frame, and quickly sprays the mixture in the dry sludge bin through a nozzle. The limestone powder is used as a carrier to drive the nitrogen to move downward, which can not only realize physical fire extinguishing, but also quickly reduce the oxygen in the dry sludge bin through nitrogen. At the same time, the limestone powder will decompose and generate carbon dioxide after being heated, which is further discharged and isolated from the air, so that the spontaneously combusting sludge in the bin is suffocated and extinguished, thereby ensuring its fire fighting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0014] Figure 1 It is a structural schematic diagram of the dry sludge silo fire-fighting device of the utility model;

[0015] Description of Figure Numbers:

[0016] Limestone powder silo 1, compressed air cylinder 2, compressed nitrogen cylinder 3, air inlet pipe 4, nitrogen inlet pipe 31, air inlet pipe 21, air control valve 22, nitrogen control valve 32, electric air lock 5, three-way pipe 6, spray rack 7, nozzle 71, fire main pipe 72, fire branch pipe 73, pipeline switching valve 74, smoke temperature alarm 75, dry sludge silo 8. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0019] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0020] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0021] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0022] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0024] See also Figure 1 As shown, a fire-fighting device for a dry sludge bin 8 of the utility model comprises a limestone powder bin 1 and a spraying rack 7 . The limestone powder bin 1 is used to store limestone powder, and the spraying rack 7 is used to introduce limestone powder and gas into the dry sludge bin 8 .

[0025] Specifically, the limestone powder bin 1 of the utility model is connected to the spray rack 7 through a three-way pipe 6, and the other end of the three-way pipe 6 is connected to the air intake pipe 4, the air intake pipe 4 is respectively connected to the nitrogen introduction pipe 31 and the air introduction pipe 21, the nitrogen introduction pipe 31 is connected to the compressed nitrogen bottle 3, the air introduction pipe 21 is connected to the compressed air bottle 2, and a nitrogen control valve 32 is arranged on the nitrogen introduction pipe 31, and an air control valve 22 is arranged on the air introduction pipe 21. The spray rack 7 is arranged on the top of the dry sludge bin 8, and a plurality of nozzles 71 are evenly arranged on the spray rack 7.

[0026] Please continue reading Figure 1As shown, a fire main pipe 72 is arranged between the three-way pipe 6 and the spray rack 7 of the utility model, and a pipeline switching valve 74 is arranged on the fire main pipe 72. The pipeline switching valve 74 is externally connected to a desulfurization device, and a smoke temperature alarm 75 for sensing the temperature of the smoke in the limestone powder bin 1 is installed in the limestone powder bin 1, and an electric air lock 5 is arranged between the limestone powder bin 1 and the three-way pipe 6.

[0027] During sludge incineration, limestone powder needs to be sprayed into the boiler, that is, the limestone powder stored in the limestone powder bin 1 is transported to the boiler furnace through compressed air for flue gas desulfurization.

[0028] During normal operation, the air control valve 22 is opened and the nitrogen control valve 32 is closed, the pipeline switching valve 74 is switched to the desulfurization device passage, and the limestone powder in the limestone powder bin 1 enters the mixing transmitter through the fire main pipe 72 and the electric air lock 5, and is transported to the desulfurization device through the fire main pipe 72 using compressed air.

[0029] When the sludge in the dry sludge bin 8 spontaneously combusts, the smoke temperature alarm 75 feeds back a signal, the electric air lock 5 starts, the air control valve 22 is closed and the nitrogen control valve 32 is opened, and the limestone powder is pneumatically transported to the dry sludge bin 8 by compressed nitrogen through the fire-fighting pipe and nozzle 71. After the gas-solid two-phase flow formed by the limestone powder and the high-pressure nitrogen enters the dry sludge bin 8 at normal pressure, the diffusion effect will make the limestone powder evenly cover the surface of the sludge, which can isolate the sludge from the air on the one hand, and on the other hand, the limestone powder can generate carbon dioxide after being heated. The density of carbon dioxide is greater than that of air, and it can be precipitated and covered on the surface of the sludge to further isolate the air. The two effects of the limestone powder combined with the fire-fighting effect of nitrogen can extinguish the spontaneously combusting sludge.

[0030] After the smoke temperature alarm 75 stops feeding back the alarm signal, the air control valve 22 is opened and the nitrogen control valve 32 is closed, the pipeline switching valve 74 is switched to the desulfurization device passage, and the limestone powder is transported to the desulfurization device using compressed air.

[0031] In order to ensure the uniformity of the limestone powder and nitrogen spraying, the spray rack 7 of the utility model is provided with a plurality of evenly arranged and connected fire branch pipes 73 , and the nozzles 71 are installed at the ends of the fire branch pipes 73 .

[0032] The utility model is a dry sludge bin 8 fire fighting device, which is combined with the limestone powder bin 1 through the nitrogen introduction pipe 31, and the compressed nitrogen is fully mixed with the limestone powder, and is introduced to the top of the spraying frame 7, and is quickly sprayed in the dry sludge bin 8 through the nozzle 71. The limestone powder is used as a carrier to drive the nitrogen to move downward, which can not only achieve physical fire extinguishing, but also quickly reduce the oxygen in the dry sludge bin 8 through the nitrogen. At the same time, the limestone powder will decompose and generate carbon dioxide after heating, which is further discharged and isolated from the air, so that the sludge that spontaneously combusts in the bin is suffocated and extinguished, thereby ensuring its fire fighting effect.

[0033] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dry sludge silo fire-fighting device, characterized in that: It includes a limestone powder bin and a spraying rack arranged on the top of the dry sludge bin, the limestone powder bin is connected to the spraying rack through a three-way pipe, the other side of the three-way pipe is connected to an air intake pipe, the air intake pipe is respectively connected to a nitrogen inlet pipe and an air inlet pipe, the nitrogen inlet pipe and the air inlet pipe are respectively equipped with pneumatic control valves, a nozzle is arranged on the spraying rack, the nitrogen inlet pipe and the air inlet pipe are respectively connected to a compressed nitrogen bottle and a compressed air bottle.

2. A dry sludge silo fire-fighting device as claimed in claim 1, characterized in that: The pneumatic control valve comprises an air control valve and a nitrogen control valve. The air control valve is installed on the air introduction pipe, and the nitrogen control valve is installed on the nitrogen introduction pipe.

3. A dry sludge silo fire-fighting device as claimed in claim 1, characterized in that: An electric air lock is arranged between the limestone powder bin and the three-way pipe.

4. A dry sludge silo fire fighting device as claimed in claim 1, characterized in that: A fire main pipe is arranged between the three-way pipe and the spray rack.

5. A dry sludge silo fire fighting device as claimed in claim 4, characterized in that: The fire main pipe is provided with a pipeline switching valve, and the pipeline switching valve is externally connected to a desulfurization device.

6. A dry sludge silo fire fighting device as claimed in claim 1, characterized in that: The spray rack is provided with a plurality of fire-fighting branch pipes which are evenly arranged and connected, and the nozzles are installed at the ends of the fire-fighting branch pipes.

7. A dry sludge silo fire fighting device as claimed in claim 1, characterized in that: A smoke and temperature alarm is installed in the limestone powder silo.

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