Air leakage prevention device during maintenance period of slag extractor and working method of air leakage prevention device

Abstract

The invention relates to an air leakage prevention device in the maintenance period of a slag extractor, which comprises a sealing ball used for inflating and expanding to block a slag discharging channel of the slag extractor, the sealing ball is provided with a patch type thermodetector, a temperature display, an inflation port joint, a pressure limiting exhaust valve, an accident safety valve and a pressure gauge, and shackles are further fixedly arranged on opposite angles of the front side and the rear side of the sealing ball. After the device is put into use, cold air outside a system can be effectively prevented from entering a hearth to cause great temperature drop in the furnace, so that less or even no natural gas is added, the use amount of the natural gas is greatly saved, and the operation cost is reduced; high-temperature smoke leakage or falling of high-temperature slag on burnout caused by positive pressure formed when negative pressure in the hearth fluctuates can be prevented, a safer working environment is provided for maintainers, and potential safety accidents are reduced. And air in the ball can be discharged after overhauling, is convenient to recycle and can be repeatedly used.

Description

TECHNICAL FIELD

[0001] The application relates to an air leakage prevention device for a deslagging machine during maintenance and a working method thereof, and relates to the technical field of air leakage prevention devices for passages. BACKGROUND

[0002] In the prior art, as a key auxiliary equipment of a boiler system, the deslagging machine needs to be regularly maintained or repaired for fault to ensure the stable operation of the system. However, during the maintenance of the deslagging machine, due to the direct communication between the deslagging passage and the furnace, cold air from the environment outside the system can easily enter the inside of the furnace through the passage. This phenomenon can cause a sharp drop in the temperature of the furnace and waste of energy. When the maintenance is completed, additional natural gas needs to be consumed to restore the temperature of the furnace to the normal operation temperature, which not only increases the energy consumption cost but also prolongs the time for restarting the system and reduces the overall operation efficiency.

[0003] On the other hand, during the maintenance, the high-temperature flue gas leakage or the high-temperature furnace slag falling on the combustion when the negative pressure fluctuation in the furnace forms positive pressure can scald the maintenance personnel, which directly and seriously threatens the personal safety of the on-site maintenance personnel.

[0004] Therefore, in order to solve the above technical problems, the application provides an air leakage prevention device for a deslagging machine during maintenance and a working method thereof. SUMMARY

[0005] In view of the deficiencies of the prior art, the technical problem to be solved by the application is to provide an air leakage prevention device for a deslagging machine during maintenance and a working method thereof.

[0006] In order to solve the above technical problems, the technical scheme of the application is as follows: an air leakage prevention device for a deslagging machine during maintenance, comprising a sealing ball used to inflate and block a deslagging passage of the deslagging machine, a patch type thermometer, a temperature display, an inflation port joint, a pressure limiting exhaust valve, an accident safety valve and a pressure gauge are arranged on the sealing ball, and hooks are fixed on the opposite sides of the sealing ball. A sleeve corresponding to the hook is arranged on the inner wall below the manhole door on the same side of the deslagging passage and on the inner wall above the manhole door on the opposite side of the deslagging passage, and a detachable cover is arranged on the pipe opening of the sleeve. A steel wire rope is arranged in the sleeve, the inner end of the steel wire rope is tied to the corresponding hook, and the outer end of the steel wire rope is tied after extending out of the deslagging passage along the sleeve with the cover opened.

[0007] Preferably, the shape of the sealing ball is a cube.

[0008] Preferably, the ball wall of the sealing ball has two layers, i.e. an inner layer of high-temperature vulcanized silicone rubber layer and an outer layer of high-silica cloth layer.

[0009] Preferably, the patch-type thermometer is arranged at a middle position of the interlayer between the inner layer and the outer layer of the top side of the sealing ball, and the temperature display, the inflation port joint, the pressure-limiting exhaust valve, the emergency safety valve and the pressure gauge are arranged on the front side of the sealing ball.

[0010] Preferably, the hook ring is arranged at the rear top side and the front bottom side of the sealing ball.

[0011] Preferably, the number of the hook rings is several, and the hook rings are arranged at the left, the middle and the right of the rear top side of the sealing ball, and the hook rings are arranged at the left, the middle and the right of the front bottom side of the sealing ball.

[0012] A working method of an air leakage prevention device of a slag extractor during maintenance, comprising the following steps: S1: opening the manhole door of the slag discharge channel and opening the covers of each sleeve, and respectively threading a steel wire into each sleeve, wherein the inner end of the steel wire is tied to the hook ring of the corresponding sealing ball; S2: leading a compressed air pipe joint to the vicinity of the manhole door, and connecting the compressed air valve on the inflation port joint of the sealing ball; S3: pulling the steel wire outside the slag discharge channel to pull the deflated sealing ball into the slag discharge channel from the manhole door; S4: first inflating the sealing ball with part of the compressed air to make it inflate to a general shape, then tying the outer end of the steel wire to an arbitrary fixed position outside the slag discharge channel, and then continuing to inflate to 0.3 MPa and stabilizing the pressure, so that the sealing ball inflates and blocks the slag discharge channel; S5: during the blocking process, the air in the sealing ball expands after being heated, and when the pressure exceeds 0.35 MPa, the pressure-limiting exhaust valve automatically opens, and when the pressure is lower than 0.25 MPa, the pressure-limiting exhaust valve automatically closes, and during the automatic opening and closing of the pressure-limiting exhaust valve, part of the heat in the sealing ball is taken out, and when the pressure in the sealing ball is lower than 0.28 MPa, the inflation valve continuously inflates with new air at a lower temperature to form replacement.

[0013] Preferably, in step S5, when the pressure in the sealing ball exceeds 0.5 MPa, the emergency safety valve automatically opens, and when the pressure is lower than 0.3 MPa, the emergency safety valve automatically closes, and the pressure gauge is used to monitor the pressure.

[0014] Compared with the prior art, the present application has the following beneficial effects: The device has the characteristics of soft texture, high plasticity, high airtightness, wear resistance, high temperature resistance and excellent heat insulation performance, and can block the slag passage under high temperature and complex environment. After the device is put into use, it can effectively prevent the cold air outside the system from entering the furnace to cause a large temperature drop in the furnace, thereby realizing less or even no natural gas investment, greatly saving the amount of natural gas, and reducing the operation cost. In addition, through effective sealing of the slag passage, the positive pressure formed by the negative pressure fluctuation in the furnace can be blocked to prevent high temperature flue gas leakage or high temperature slag falling on the burning, thereby providing a safer working environment for maintenance personnel and reducing safety accident hazards. After the maintenance is completed, the air in the ball can be released, which is convenient for recycling and can be reused.

[0015] The application will be further described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a schematic diagram of the structure of the sealing ball in the embodiment of the application.

[0017] Fig. 2 It is an intermediate working state diagram when the sealing ball in the slag passage is filled with part of compressed air in the embodiment of the application.

[0018] In the figure: slag passage 1, sealing ball 2, patch type temperature meter 3, temperature display 4, inflation port joint 5, pressure limiting exhaust valve 6, accident safety valve 7, pressure gauge 8, hook ring 9, sleeve 10, cover 11, steel wire rope 12, high temperature vulcanized silicone rubber layer 13, high silica cloth layer 14, manhole door 15. DETAILED DESCRIPTION

[0019] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0020] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0021] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0022] As Figs. 1-2As shown, the embodiment provides a kind of air leakage prevention device during maintenance of slag extractor, including the sealing ball 2 for inflating to block the lower slag passage 1 of slag extractor, the sealing ball is provided with patch type thermometer 3, temperature display 4, inflation port joint 5, pressure limiting exhaust valve 6, emergency safety valve 7 and pressure gauge 8, the hook and loop 9 of the front and rear sides of the sealing ball is also fixed on the diagonal; The lower slag passage is provided with sleeve 10 corresponding to hook and loop on the inner wall below the manhole door same side and the inner wall above the manhole door opposite side, the pipe opening of the sleeve is covered with detachable cover 11; Steel wire 12 is arranged in the sleeve, and the inner end of the steel wire is tied on the corresponding hook and loop, and the outer end of the steel wire is extended out of the lower slag passage along the sleeve with the cover opened and then tied.

[0023] In the embodiment of the application, the sealing ball is a cube, but it is not limited thereto, and the size and specific shape thereof are determined according to the cross-sectional parameters of the lower slag passage.

[0024] In the embodiment of the application, the ball wall of the sealing ball has two layers of inner and outer layers, which are a high-temperature vulcanized silicone rubber layer 13 of the inner layer and a high-silica cloth layer 14 of the outer layer. The device solves the problems of simultaneously satisfying the characteristics of soft texture, high plasticity, high air tightness, wear resistance, high temperature resistance and excellent heat insulation performance, so that the air leakage prevention device can block the passage in a high-temperature complex environment.

[0025] In the embodiment of the application, the patch type thermometer is arranged at the middle position of the interlayer between the inner and outer layers on the top side of the sealing ball, and the temperature display, inflation port joint, pressure limiting exhaust valve, emergency safety valve and pressure gauge are arranged on the front side of the sealing ball.

[0026] When the inflation port joint is connected to the gas source, it is used as an inflation function, and after the gas source is disconnected, it can be manually deflated.

[0027] The front side of the sealing ball is also provided with an audible and visual alarm, which solves the problem that the temperature and pressure cannot be discovered in time during the operation of the device.

[0028] In the embodiment of the application, the hook and loop is arranged at the top side rear of the sealing ball and the bottom side front.

[0029] In the embodiment of the application, the number of hook and loops is several, and is arranged on the left, middle and right of the top side rear of the sealing ball, and is arranged on the left, middle and right of the bottom side front of the sealing ball.

[0030] A working method of an air leakage prevention device during maintenance of slag extractor includes the following steps: S1: open the manhole door 15 of the slag channel, and open the cover of each sleeve, and pass a steel wire into each sleeve, wherein the inner end of the steel wire is tied to the hook ring of the corresponding sealing ball; S2: introduce a compressed air pipe joint to the vicinity of the manhole door, and connect the inflation valve on the inflation port joint of the sealing ball; S3: pull the steel wire outside the slag channel to pull the deflated sealing ball into the slag channel from the manhole door; S4: first inflate the sealing ball with part of the compressed air, so that it is inflated to a general shape, then tie the outer end of the steel wire to an arbitrary fixed position outside the slag channel, and then continue to inflate to 0.3 MPa, and stabilize the pressure, so that the sealing ball is inflated and sealed to block the slag channel; S5: during the sealing process, the air in the sealing ball expands after being heated, and when the pressure exceeds 0.35 MPa, the pressure limiting exhaust valve is automatically opened, and when the pressure is lower than 0.25 MPa, the pressure limiting exhaust valve is automatically closed, and during the automatic opening and closing of the pressure limiting exhaust valve, part of the heat in the sealing ball is taken out, and when the pressure in the sealing ball is lower than 0.28 MPa, the inflation valve continuously inflates with new air at a lower temperature to form displacement.

[0031] In the embodiment of the present application, when the pressure in the sealing ball exceeds 0.5 MPa in step S5, the emergency safety valve is automatically opened, and when the pressure is lower than 0.3 MPa, the emergency safety valve is automatically closed, and the pressure gauge is used to monitor the pressure.

[0032] In the embodiment of the present application, the device has the characteristics of soft texture, high plasticity, high air tightness, wear resistance, high temperature resistance, excellent heat insulation performance, etc., and can block the slag channel in a high temperature and complex environment. After the device is put into use, it can effectively prevent the cold air outside the system from entering the furnace to cause a large temperature drop in the furnace, thereby realizing less or even no natural gas investment, greatly saving the amount of natural gas, and reducing the operating cost. In addition, through effective sealing of the slag channel, the positive pressure formed by the negative pressure fluctuation in the furnace can be blocked to prevent high temperature flue gas leakage or high temperature furnace slag falling on the burning, thereby providing a safer working environment for maintenance personnel and reducing safety accident hazards. The air in the ball can be released after the maintenance is completed, which is convenient for recycling and can be reused.

[0033] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any person skilled in the art can modify or change the above disclosed technical content to obtain equivalent embodiments. However, any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments still belongs to the protection scope of the technical solution of the present application.

Claims

1. A device for preventing air leakage during the maintenance of a slag discharge machine, characterized in that: The device includes a sealing ball for inflating and expanding to seal the slag discharge channel of the slag discharge machine. The sealing ball is equipped with a patch thermometer, a temperature display, an inflation port connector, a pressure limiting and exhaust valve, an emergency safety valve, and a pressure gauge. Hook rings are also fixed on the front and rear diagonal sides of the sealing ball. The slag discharge channel is equipped with sleeves corresponding to hooks on both the inner wall below the manhole on the same side and above the inner wall on the opposite side of the manhole. The openings of the sleeves are covered with removable caps. Each sleeve is equipped with a steel wire rope, the inner end of which is tied to a corresponding hook, and the outer end of which extends out of the slag discharge channel along the sleeve with the cover open and is then tied.

2. The air leakage prevention device during the maintenance of the slag discharge machine according to claim 1, characterized in that: The sealed sphere is cubic in shape.

3. The air leakage prevention device during the maintenance of the slag discharge machine according to claim 1, characterized in that: The sealed ball has two layers: an inner high-temperature vulcanized silicone rubber layer and an outer high-silica cloth layer.

4. The air leakage prevention device during the maintenance of the slag discharge machine according to claim 3, characterized in that: The patch thermometer is located in the middle of the interlayer between the inner and outer sides of the top of the sealed ball, and the temperature display, air inlet connector, pressure limiting and exhaust valve, emergency safety valve, and pressure gauge are all located on the front side of the sealed ball.

5. The air leakage prevention device during the maintenance of the slag discharge machine according to claim 1, characterized in that: The hook ring is located behind the top side and in front of the bottom side of the sealing ball.

6. The air leakage prevention device during the maintenance of the slag discharge machine according to claim 5, characterized in that: The number of hooks is several, and they are provided on the left, middle, and right sides behind the top side of the sealing ball, and on the left, middle, and right sides in front of the bottom side of the sealing ball.

7. A method for operating the air leakage prevention device during the maintenance of a slag discharge machine as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Open the manhole door of the slag discharge channel and open the cover of each sleeve. Thread a steel wire rope through each sleeve, with the inner end of the steel wire rope tied to the hook of the corresponding sealing ball. S2: Connect a compressed air pipe connector to the vicinity of the manhole door, and connect the compressed air pipe connector to the inflation valve on the inflation port connector of the sealing ball; S3: By pulling the steel wire rope from the outside of the slag discharge channel, the deflated sealing ball is pulled into the slag discharge channel from the manhole. S4: First, fill the sealing ball with some compressed air and inflate it to its approximate shape. Then, tie the outer end of the wire rope to any fixed position outside the slag discharge channel. Continue to inflate to 0.3MPa and stabilize the pressure to inflate the sealing ball and block the slag discharge channel. S5: During the sealing process, the air inside the sealing ball expands and the pressure increases after being heated. When the pressure exceeds 0.35MPa, the pressure relief valve automatically opens, and when it is below 0.25MPa, the pressure relief valve automatically closes. During the automatic opening and closing of the pressure relief valve, some of the heat inside the sealing ball will be carried out. When the pressure inside the sealing ball is below 0.28MPa, the air filling valve continuously fills in fresh air at a lower temperature, thus forming a displacement.

8. The working method of the anti-air leakage device during the maintenance of the slag discharge machine according to claim 7, characterized in that: In step S5, the emergency safety valve automatically opens when the pressure inside the sealing ball exceeds 0.5 MPa and automatically closes when the pressure is below 0.3 MPa. The pressure gauge is used to monitor the pressure.

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