Spraying system and construction process of blocking and sealing material for inhibiting spontaneous combustion and dust raising of coal

Abstract

The spraying system comprises a material storage device, a material conveying pipe and a spraying assembly, the spraying assembly comprises a material disc and a plurality of spraying nozzles rotationally connected to the material disc, a material passing assembly is arranged in the material disc, the two ends of the material conveying pipe communicate with the material storage device and the material passing assembly correspondingly, and the spraying nozzles are arranged on the material disc. A blocking and sealing material is stored in the material storage device, the material disc is provided with an adjusting assembly, the adjusting assembly comprises a rotating shaft, a plurality of gears, a plurality of racks and a plurality of half teeth, the rotating shaft is rotationally connected with the material disc, all the gears are fixedly connected to the rotating shaft, the racks are meshed with the corresponding gears, and the half teeth are fixedly connected to the upper ends of the corresponding spray heads. And the half teeth are meshed with the corresponding racks. The spraying angle of the spray head is accurately controlled to adapt to complex and variable working condition requirements, the utilization rate of the blocking and sealing material is increased, the protection effect of the blocking and sealing material on a coal pile is guaranteed, and the effect of restraining coal spontaneous combustion and dust raising is improved.

Description

Technical Field

[0001] The invention relates to the field of coal spontaneous combustion prevention and control, and in particular to a spraying system and a construction process of a sealing material for inhibiting coal spontaneous combustion and dust emission. Background Art

[0002] As an important energy resource, coal is prone to spontaneous combustion due to oxidation reactions during storage and transportation. At the same time, dust on the surface of coal piles can also cause environmental pollution and safety hazards. In order to effectively deal with these problems, the industry has gradually developed a series of technical measures specifically for coal protection, aiming to isolate oxygen contact through physical or chemical means, thereby achieving the effect of inhibiting coal spontaneous combustion and reducing dust. These technologies not only help improve the safety of coal storage and transportation and reduce resource loss, but also significantly reduce environmental hazards, which is of great significance to promoting the sustainable development of the coal industry.

[0003] Among the related technologies, the use of sealing materials has become one of the research directions that has received much attention in recent years. Sealing materials can effectively isolate oxygen and reduce the chance of contact between the coal surface and the air, thereby inhibiting spontaneous combustion, reducing the risk of dust flying, and protecting the safety of the working environment. In the actual implementation process, the sealing materials are generally transported to the target area through spraying equipment and then placed in a rough manner. In some scenarios, simple brackets are built to cooperate with a single nozzle to implement spraying operations in a local area.

[0004] Regarding the above-mentioned related technologies, in actual applications, the above-mentioned operation method is difficult to achieve precise control of the spraying angle to adapt to the complex and changeable working conditions, resulting in a low utilization rate of the sealing material and poor protection effect on the coal pile, which in turn leads to poor effect in suppressing coal spontaneous combustion and dust. Summary of the invention

[0005] In order to improve the utilization rate of sealing materials, ensure the protective effect on coal piles, and improve the effect of suppressing coal spontaneous combustion and dust, the present application provides a spraying system and construction process of sealing materials for suppressing coal spontaneous combustion and dust.

[0006] In the first aspect, the present application provides a spraying system of a sealing material for inhibiting spontaneous combustion and dust emission of coal, which adopts the following technical solution:

[0007] A system for spraying sealing materials for suppressing spontaneous combustion and dust emission of coal, comprises a material storage device, a material delivery pipe and a spraying assembly, the spraying assembly comprises a material tray and a plurality of nozzles rotatably connected to the material tray, a material through assembly connecting all the nozzles is provided in the material tray, both ends of the material delivery pipe are respectively connected to the material storage device and the material through assembly, the sealing material is stored in the material storage device, the material tray is provided with an adjusting assembly for adjusting the spraying angles of all the nozzles at the same time, the adjusting assembly comprises a rotating shaft, a plurality of gears, a plurality of racks and a plurality of half teeth, the rotating shaft is rotatably connected to the material tray, all the gears are fixedly connected to the rotating shaft, the racks are meshed with their corresponding gears, the half teeth are fixedly connected to the upper ends of the corresponding nozzles, the half teeth are meshed with their corresponding racks, and a cavity is provided in the material tray for the rotating shaft, the gears, the racks and the half teeth to move.

[0008] Optionally, the material passing assembly includes a longitudinal material cavity, a plurality of transverse material cavities and a plurality of soft connecting pipes arranged inside the material tray, the longitudinal material cavity is connected to all the transverse material cavities, and the material delivery pipe is connected to the longitudinal material cavity; one end of a single soft connecting pipe is connected to the corresponding transverse material cavity, and the other end is connected to the corresponding nozzle.

[0009] Optionally, the nozzle includes a rotating part and a spraying part, the rotating part is rotatably connected to the material tray, and the half tooth is fixedly connected to the upper end of the rotating part; a plurality of spray holes are provided at the lower end of the spraying part, the soft pipe is connected to the spraying part, the upper end of the spraying part is fixedly connected to an arc plate, the rotating part is provided with an arc groove matched with the arc plate, the arc plate is connected with a positioning bolt, and the rotating part is provided with a plurality of screw holes matched with the positioning bolts, and the screw holes are all located in the arc groove.

[0010] Optionally, the material storage device is provided with an anti-sedimentation assembly, the anti-sedimentation mechanism includes a stirring motor, a stirring shaft and a plurality of stirring blades, the stirring motor is fixedly connected to the material storage device, the stirring motor output shaft is fixedly connected to the stirring shaft, all stirring blades are fixedly connected to the stirring shaft, and the stirring blades are arranged at equal distances along the length direction of the stirring shaft.

[0011] Optionally, the sealing material includes water, a mixture of coal powder and dust, and a composite colloid, and the mass ratio of the water, the mixture of coal powder and dust, and the composite colloid is 80:80:1.

[0012] Optionally, the feed pipe is connected to a pressure regulating device and a pumping device, wherein the pressure regulating device is used to adjust the spray pressure of the nozzle; and the pumping device is used to stably transport the blocking material to the feed pipe.

[0013] In the second aspect, the present application provides a construction process for a sealing material for inhibiting spontaneous combustion and dust emission of coal, using the following technical solution:

[0014] A construction process of a sealing material for inhibiting spontaneous combustion and dust emission of coal, comprising:

[0015] S1, before spraying, clean up the attachments and obstacles on the surface of the coal pile to be treated, set the spraying height according to the site conditions and calibrate the level so that the thickness of the generated barrier coating reaches the preset value;

[0016] S2, adding the sealing material components into the storage device in proportion and stirring them evenly;

[0017] S3, the sealing material flows from the storage device through the feed pipe and is sprayed out from the nozzle of the material tray. The operator holds the spray assembly close to the surface of the coal pile and starts continuous spraying operation at the area that needs protection.

[0018] Until the designated area is fully covered to form a blocking coating;

[0019] S4, after spraying is completed, the material storage device, material delivery pipe and spraying components stop running, and the remaining materials are emptied in time and the relevant pipelines are thoroughly cleaned.

[0020] Optionally, between steps S3 and S4, a curing period of not less than 30 minutes is set after the first spraying is completed, and then a second spraying process is performed to improve the stability of the barrier coating.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. When the shaft rotates, all the nozzles rotate synchronously through the meshing transmission of the gear rack and the meshing transmission of the rack and the half-tooth, so as to accurately control the spraying angle of the nozzle to adapt to the complex and changeable working conditions, improve the utilization rate of the sealing material, ensure the protective effect of the sealing material on the coal pile, and thus improve the effect of inhibiting coal spontaneous combustion and dust;

[0023] 2. When the angle of a single nozzle needs to be adjusted, remove the positioning bolt, slide the arc plate in the arc groove to the required spraying angle, and then connect the positioning bolt to the corresponding screw hole through the thread to position the spraying part, so that the adjustment of the spraying angle is more convenient;

[0024] 3. The sealing material components include water, coal powder dust mixture, and composite colloid. The mass ratio of water, coal powder dust mixture, and composite colloid is 80:80:1. The composite colloid is formed by a base material and a trace amount of coagulant. The base material can be silica gel, and the coagulant is ammonium bicarbonate, sodium bicarbonate, etc. The composite colloid has good high temperature resistance, certain plugging and chemical resistance. The sealing material synthesized by the three components has a significant effect in inhibiting coal spontaneous combustion and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a spraying system of a sealing material for suppressing spontaneous combustion and dust emission of coal according to an embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of the structure of the spray assembly.

[0027] Figure 3 It is a structural schematic diagram of the material passing component.

[0028] Figure 4 It is a schematic diagram of the structure of the nozzle.

[0029] Figure 5 It is a schematic diagram of the structure of the regulating component.

[0030] Figure 6 It is a structural schematic diagram of the anti-settling component.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. material storage device; 11. anti-settling component; 111. stirring motor; 112. stirring shaft; 113. stirring blade; 2. material delivery pipe; 21. pressure regulating device; 22. pumping device; 3. spraying component; 31. material tray; 32. nozzle; 321. rotating part; 322. material spraying part; 3221. spray hole; 3222. arc plate; 3211. arc groove; 3223. positioning bolt; 33. material passing component; 331. longitudinal material chamber; 332. transverse material chamber; 333. soft connecting pipe; 4. adjusting component; 41. rotating shaft; 42. gear; 43. rack; 44. half tooth; 5. motor. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0033] The embodiment of the present application discloses a spraying system of a sealing material for suppressing spontaneous combustion and dust emission of coal.

[0034] Example

[0035] Reference Figure 1 and Figure 2 A spraying system for sealing materials for inhibiting spontaneous combustion and dust emission of coal includes a storage device 1, a feed pipe 2, and a spraying assembly 3. The spraying assembly 3 includes a material tray 31 and a plurality of nozzles 32 rotatably connected to the material tray 31. In this embodiment, 12 nozzles 32 are provided. The storage device 1 is used to store the sealing material components and is connected to the material tray 31 through the feed pipe 2. The inner wall of the storage device 1 can be made of corrosion-resistant stainless steel with good resistance to chemical erosion. In order to facilitate the monitoring of the liquid level, a transparent observation window can be provided on the top for the operator to refer to and adjust the replenishment amount in real time.

[0036] Reference Figure 1 and Figure 2The sealing material stored in the storage device 1 includes water, a mixture of coal dust and a composite colloid, and the mass ratio of water, coal dust and the composite colloid is 80:80:1. The composite colloid is formed by a base material and a trace amount of a coagulant. The base material can be silica gel, and the coagulant is ammonium bicarbonate, sodium bicarbonate, etc. The composite colloid has good high temperature resistance, certain plugging and chemical resistance. The sealing material synthesized by the three components has a significant effect in inhibiting coal spontaneous combustion and dust.

[0037] Reference Figure 1 and Figure 3 A material passing assembly 33 connecting all the nozzles 32 is provided in the material tray 31. The material passing assembly 33 includes a longitudinal material cavity 331, a plurality of transverse material cavities 332 and a plurality of soft pipes 333 arranged inside the material tray 31. In this embodiment, three groups of transverse material cavities 332 are arranged. The longitudinal material cavity 331 is connected with all the transverse material cavities 332. Both ends of the feed pipe 2 are respectively connected with the storage device 1 and the longitudinal material cavity 331. The sealing material in the storage device 1 can enter the longitudinal material cavity 331 through the feed pipe 2, and then flow into all the transverse material cavities 332 through the longitudinal material cavity 331.

[0038] Reference Figure 3 and Figure 4 One end of a single soft pipe 333 is connected to the corresponding transverse cavity 332, and the other end is connected to the corresponding nozzle 32. The blocking material in the transverse cavity 332 then enters the nozzle 32 through the soft pipe 333, so that the blocking material can flow to all nozzles 32 more quickly. The nozzle 32 includes a rotating part 321 and a spraying part 322. The lower end of the spraying part 322 is provided with a plurality of spray holes 3221. The soft pipe 333 is connected to the spraying part 322. The blocking material enters the spraying part 322 through the soft pipe 333 and is then sprayed out from the spray holes 3221.

[0039] Reference Figure 4 and Figure 5 The tray 31 is provided with an adjustment component 4 for adjusting the spraying angles of all nozzles 32 at the same time. The adjustment component 4 includes a rotating shaft 41, a plurality of gears 42, a plurality of racks 43 and a plurality of half teeth 44. In this embodiment, 4 gears 42, 4 racks 43 and 12 half teeth 44 are provided. A cavity for the rotating shaft 41, gears 42, racks 43 and half teeth 44 to move is provided in the tray 31. The rotating shaft 41 is rotatably connected to the tray 31. All gears 42 are fixedly connected to the rotating shaft 41, and the racks 43 are meshed with their corresponding gears 42. In this embodiment, a motor 5 is installed outside the tray 31. The output end of the motor 5 is fixedly connected to the rotating shaft 41. The motor 5 drives all the gears 42 on the rotating shaft 41 to rotate, thereby causing all the racks 43 to slide. The half teeth 44 are meshed with their corresponding racks 43. When the racks 43 slide, all the half teeth 44 are driven to rotate.

[0040] Reference Figure 4 and Figure 5 The rotating part 321 of the nozzle 32 is rotatably connected to the material tray 31, and the half teeth 44 are fixedly connected to the corresponding upper end of the rotating part 321. When the output end of the motor 5 rotates, the meshing transmission of the gear 42 and the rack 43, and the meshing transmission of the rack 43 and the half teeth 44 make all the nozzles 32 rotate synchronously, so as to achieve precise control of the spraying angle of the nozzle 32 to adapt to the complex and changeable working conditions, improve the utilization rate of the sealing material, ensure the protective effect of the sealing material on the coal pile, and thus improve the effect of suppressing coal spontaneous combustion and dust.

[0041] Reference Figure 4 and Figure 5 The upper end of the spraying part 322 is fixedly connected to the arc plate 3222, the rotating part 321 is provided with an arc groove 3211 adapted to the arc plate 3222, the arc plate 3222 is connected with a positioning bolt 3223, and the rotating part 321 is provided with a plurality of screw holes adapted to the positioning bolts 3223, and the screw holes are all located in the arc groove 3211. When it is necessary to adjust the angle of a single nozzle 32, the operator removes the positioning bolt 3223, slides the arc plate 3222 in the arc groove 3211 to the required spraying angle, and then screws the positioning bolt 3223 to the corresponding screw hole in the arc groove 3211 to position the spraying part 322, so that the adjustment of the spraying angle is more convenient.

[0042] Reference Figure 1 and Figure 6 The feeding pipe 2 is connected with a pressure regulating device 21 and a pumping device 22. The pressure regulating device 21 adopts a pressure valve to adjust the injection pressure of the nozzle 32; the pumping device 22 adopts a plunger pump to ensure that the blocking material is stably delivered to the feeding pipe 2. The storage device 1 is provided with an anti-settling component 11. The anti-settling mechanism includes a stirring motor 111, a stirring shaft 112 and a plurality of stirring blades 113. In this embodiment, 5 groups of stirring blades 113 are provided. The stirring motor 111 is fixedly connected to the storage device 1, the output shaft of the stirring motor 111 is fixedly connected to the stirring shaft 112, all the stirring blades 113 are fixedly connected to the stirring shaft 112, and the stirring blades 113 are arranged at equal distances along the length direction of the stirring shaft 112.

[0043] Reference Figure 1 and Figure 6 During the spraying process, the operator starts the stirring motor 111, and the output shaft of the stirring motor 111 rotates to drive the stirring shaft 112 to rotate, thereby causing all the stirring blades 113 to rotate, stirring the sealing material in the storage device 1, maintaining the uniformity of the sealing material, and ensuring that the sealing material is sprayed out of the nozzle 32 more evenly, which is beneficial to improving the spraying effect.

[0044] The implementation principle of the spraying system of a sealing material for suppressing coal spontaneous combustion and dust in the embodiment of the present application is as follows: the sealing material stored in the storage device 1 includes water, a mixture of coal powder and dust, and a composite colloid, and the mass ratio of water, the mixture of coal powder and dust, and the composite colloid is 80:80:1. The sealing material synthesized by the three components has a significant effect in suppressing coal spontaneous combustion and dust. The sealing material in the storage device 1 can flow through the pumping device 22, through the feed pipe 2, into the longitudinal material cavity 331, and then flow through the transverse material cavity 332 and the soft pipe 333 into the nozzle 32, and finally spray out from the spray hole 3221. When the output end of the motor 5 rotates, through the meshing transmission of the gear 42 and the rack 43, and the meshing transmission of the rack 43 and the half-tooth 44, all the nozzles 32 rotate synchronously, and the spraying angle of the nozzle 32 can be accurately controlled to adapt to the complex and changeable working conditions, improve the utilization rate of the sealing material, and ensure the protective effect of the sealing material on the coal pile, thereby improving the effect of inhibiting the spontaneous combustion of coal and dust. When it is necessary to adjust the angle of a single nozzle 32, the operator removes the positioning bolt 3223, and then slides the arc plate 3222 in the arc groove 3211 to the required spraying angle, and then uses the positioning bolt 3223 to thread the corresponding screw hole in the arc groove 3211 to position the spray part 322, so that the adjustment of the spraying angle is more convenient.

[0045] The embodiment of the present application also discloses a construction process of a sealing material for suppressing spontaneous combustion and dust emission of coal.

[0046] A construction process of a sealing material for inhibiting spontaneous combustion and dust emission of coal, comprising:

[0047] S1, before spraying, clean up the attachments and obstacles on the surface of the coal pile to be treated to ensure good bonding performance, set the spraying height according to the site conditions and calibrate the level so that the thickness of the generated barrier coating reaches the preset value;

[0048] S2, adding the sealing material components into the storage device 1 in proportion and stirring them evenly;

[0049] S3, the sealing material flows from the material storage device 1 through the material delivery pipe 2 and is sprayed from the nozzle 32 of the material tray 31. The operator holds the spray assembly 3 close to the surface of the coal pile, aims at the area to be protected and starts continuous spraying until the designated area is fully covered to form a sealing coating; after the initial spraying is completed, a hardening period of not less than 30 minutes is set, and then a second spraying process is performed to improve the stability of the sealing coating;

[0050] S4, after spraying is completed, the storage device 1, the feed pipe 2 and the spraying assembly 3 stop running, and the remaining materials are emptied in time and the relevant pipelines are thoroughly cleaned to prevent the residual blocking material from hardening and causing blockage, so as to ensure subsequent normal use.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A spraying system for sealing materials for inhibiting spontaneous combustion and dust emission of coal, comprising a material storage device (1), a material delivery pipe (2) and a spraying assembly (3), characterized in that: The spraying assembly (3) comprises a material tray (31) and a plurality of nozzles (32) rotatably connected to the material tray (31); a material passing assembly (33) for connecting all the nozzles (32) is provided in the material tray (31); two ends of the material conveying pipe (2) are respectively connected to the material storage device (1) and the material passing assembly (33); the material storage device (1) stores the blocking material; the material tray (31) is provided with an adjusting assembly (4) for simultaneously adjusting the spraying angles of all the nozzles (32); the adjusting assembly (4) comprises a rotating shaft (41), a plurality of gears (42) and a plurality of , a plurality of racks (43) and a plurality of half teeth (44), the rotating shaft (41) is rotatably connected to the material tray (31), all the gears (42) are fixedly connected to the rotating shaft (41), the racks (43) are meshed with the corresponding gears (42), the half teeth (44) are fixedly connected to the upper end of the corresponding nozzle (32), the half teeth (44) are meshed with the corresponding racks (43), and a cavity is provided in the material tray (31) for the rotating shaft (41), the gears (42), the racks (43) and the half teeth (44) to move.

2. The spraying system of the sealing material for inhibiting spontaneous combustion and dust emission of coal according to claim 1 is characterized in that: The material passing assembly (33) comprises a longitudinal material cavity (331), a plurality of transverse material cavities (332) and a plurality of soft pipes (333) arranged inside the material tray (31); the longitudinal material cavity (331) is connected to all the transverse material cavities (332); the material delivery pipe (2) is connected to the longitudinal material cavity (331); one end of a single soft pipe (333) is connected to the corresponding transverse material cavity (332), and the other end is connected to the corresponding nozzle.

3. The spraying system of the sealing material for inhibiting spontaneous combustion and dust emission of coal according to claim 2 is characterized in that: The spray head (32) comprises a rotating part (321) and a spraying part (322); the rotating part (321) is rotatably connected to the material tray (31); the half teeth (44) are fixedly connected to the upper end of the rotating part (321); a plurality of spray holes (3221) are arranged at the lower end of the spraying part (322); a soft pipe (333) is connected to the spraying part (322); the upper end of the spraying part (322) is fixedly connected to an arc plate (3222); the rotating part (321) is provided with an arc groove (3211) matched with the arc plate (3222); the arc plate (3222) is connected with a positioning bolt (3223); the rotating part (321) is provided with a plurality of screw holes matched with the positioning bolt (3223); the screw holes are all located in the arc groove (3211).

4. The spraying system of the sealing material for inhibiting spontaneous combustion and dust emission of coal according to claim 1 is characterized in that: The material storage device (1) is provided with an anti-sedimentation assembly (11), the anti-sedimentation assembly (11) comprising a stirring motor (111), a stirring shaft (112) and a plurality of stirring blades (113), the stirring motor (111) being fixedly connected to the material storage device (1), the output shaft of the stirring motor (112) being fixedly connected to the stirring shaft (112), all the stirring blades (113) being fixedly connected to the stirring shaft (112), and the stirring blades (113) being arranged at equal distances along the length direction of the stirring shaft (112).

5. The spraying system of the sealing material for inhibiting spontaneous combustion and dust emission of coal according to claim 1 is characterized in that: The blocking material comprises water, a mixture of coal powder and dust, and a composite colloid, and the mass ratio of the water, the mixture of coal powder and dust, and the composite colloid is 80:80:

1.

6. The spraying system of the sealing material for inhibiting spontaneous combustion and dust emission of coal according to claim 1 is characterized in that: The material delivery pipe (2) is connected to a pressure regulating device (21) and a pumping device (22); the pressure regulating device (21) is used to adjust the spray pressure of the nozzle (32); and the pumping device (22) is used to stably deliver the blocking material to the material delivery pipe (2).

7. A method for constructing a sealing material for inhibiting spontaneous combustion and dust emission of coal applied to the spraying system according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, before spraying, clean up the attachments and obstacles on the surface of the coal pile to be treated, set the spraying height according to the site conditions and calibrate the level so that the thickness of the generated barrier coating reaches the preset value; S2, adding the sealing material components into the storage device (1) in proportion and stirring them uniformly; S3, the sealing material flows from the material storage device (1) through the material delivery pipe (2) and is sprayed out from the nozzle (32) of the material tray (31). The operator holds the spray assembly (3) close to the surface of the coal pile, aims at the area to be protected and starts continuous spraying operation until the designated area is fully covered to form a sealing coating; S4, after spraying is completed, the material storage device (1), the material delivery pipe (2) and the spraying assembly (3) stop running, and the remaining materials are emptied in time and the relevant pipelines are thoroughly cleaned.

8. The spraying system and construction process of the sealing material for inhibiting spontaneous combustion and dust emission of coal according to claim 7 is characterized in that: Between steps S3 and S4, a curing period of not less than 30 minutes is set after the first spraying is completed, and then a second spraying process is performed to improve the stability of the barrier coating.

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