A gas-sealing system for preventing coal gas overflow during coal feeding

Abstract

This utility model discloses a gas-sealing system for preventing gas leakage during coal feeding, belonging to the field of gas isolation technology. It includes a coal feeder, a feeding hopper, and a gas furnace chamber connected sequentially from top to bottom. A bell jar is embedded between the feeding hopper and the gas furnace chamber. Four steam pipes are circumferentially connected to the outer wall of the feeding hopper, extending along the inner wall of the feeding hopper into the gas furnace chamber. A spraying device is connected to the bottom end of each steam pipe. This utility model introduces steam into the gas furnace, ensuring uniform spraying, preventing gas leakage, and providing readily available steam, thus saving resources.

Description

Technical Field

[0001] This utility model belongs to the field of gas isolation technology, specifically relating to a gas seal system for isolating gas overflow during coal feeding. Background Technology

[0002] When coal is fed into a gasifier, coal chunks fall into the furnace. Due to the pressure inside the furnace, gas overflows from the furnace as the bell jar of the coal feeder opens, causing gas leakage into the feeder. The gas then flows through the feeder into the coal bunker and into the workshop. This gas leakage not only wastes valuable resources but also causes serious environmental pollution. Coal gas is a flammable and explosive gas; leakage into the workshop poses a significant safety hazard. If it comes into contact with an open flame or static electricity, it could potentially cause an explosion or fire, seriously threatening the lives of production personnel and the safety of company property.

[0003] A Chinese patent with publication number CN222593776U discloses a gasifier structure for preventing gas leakage. The gasifier body includes a gasifier body, which consists of a hopper arranged sequentially from top to bottom, a chute with a slide valve, a small feeder, a large feeder, and a furnace body. The structure also includes a nitrogen vent pipe and a nitrogen inlet pipe. The large feeder has a nitrogen inlet and a nitrogen outlet. The nitrogen inlet pipe is sealed to the nitrogen inlet, and the nitrogen vent pipe is sealed to the nitrogen outlet. The nitrogen vent pipe has a vent valve, and the nitrogen inlet pipe has a nitrogen charging valve and a pressure gauge.

[0004] The above technical solution uses nitrogen pipes to pressurize the gas inside the furnace body and prevent it from entering the large distributor. However, this method has the following problems: First, the nitrogen is placed at the top of the large distributor, and the nitrogen must first fill the large distributor before being pressed into the furnace, which requires a large amount of nitrogen. Furthermore, there is a possibility that uneven distribution may lead to slight gas leakage. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a gas-sealing system that isolates the gas overflow during coal feeding. Steam is introduced into the gas furnace and sprayed evenly to prevent gas leakage. Steam is also easy to obtain and saves resources.

[0006] The technical solution adopted by this utility model is a gas-sealing system for preventing coal gas overflow during coal feeding, comprising a coal feeder, a feeding hopper, and a gas furnace hopper connected sequentially from top to bottom. A bell jar is embedded between the feeding hopper and the gas furnace hopper. Four steam pipes are connected circumferentially along the outer wall of the feeding hopper. The steam pipes extend along the inner wall of the feeding hopper into the gas furnace hopper, and a spraying device is connected to the bottom end of the steam pipes.

[0007] The present invention is further characterized in that,

[0008] The top of the feeding hopper is equipped with a traction wheel, which is connected to the bell jar via a lead wire. The bell jar has an annular groove near the top, and a sealing ring is embedded in the annular groove.

[0009] The steam pipe is equipped with a regulating valve and a first pressure sensor.

[0010] A concentration detector and a second pressure sensor are installed at the top of the gas furnace chamber.

[0011] The spraying device includes a spray box, which is connected to the steam pipe. Angled nozzles are provided at both ends of the outer wall of the spray box, and straight nozzles are evenly arranged between the two angled nozzles.

[0012] The regulating valve, the first pressure sensor, the concentration detector, and the second pressure sensor are all electrically connected to a control terminal.

[0013] The sealing ring is made of high-temperature resistant aluminum silicate fiber material.

[0014] The beneficial effects of this utility model are:

[0015] (1) In the gas-sealing system for preventing gas overflow during coal feeding, the outer wall of the feeding hopper of this utility model is connected to four steam pipes along the circumference, and the steam pipes extend into the gas furnace chamber, with the bottom end connected to a spraying device. During the coal feeding process, steam is sprayed out through the spraying device, which can form a gas seal layer between the feeding hopper and the gas furnace chamber. This gas seal can effectively prevent the gas from overflowing upwards, avoid the gas from leaking into the surrounding environment, ensure the safety of the production environment, reduce the potential threat of gas to the health of operators, and also reduce the risk of safety accidents such as gas explosions.

[0016] (2) In the gas-sealing system for preventing gas overflow during coal feeding, a bell jar is embedded between the feeding hopper and the gas furnace hopper. The annular groove near the top of the bell jar is fitted with a sealing ring made of high-temperature resistant aluminum silicate fiber material. The bell jar serves to initially block the gas, while the sealing ring further enhances the sealing between the bell jar and the feeding hopper. This double protection reduces the possibility of gas overflowing from the gap between the two.

[0017] (3) In this utility model, a gas-sealing system for isolating coal gas overflow during coal feeding is equipped with a regulating valve and a first pressure sensor on the steam pipe, and a concentration detector and a second pressure sensor are installed at the top of the inside of the gas furnace. All these components are electrically connected to the control terminal. The pressure inside the steam pipe can be monitored in real time by the first pressure sensor, and the control terminal adjusts the opening of the regulating valve according to the pressure data to accurately control the steam injection volume. At the same time, the concentration detector can monitor the concentration of coal gas in the gas furnace in real time, and the second pressure sensor monitors the pressure inside the furnace. When the coal gas concentration or pressure is abnormal, the control terminal can react in time, adjust the steam injection volume or take other measures to ensure the stable operation of the system.

[0018] (4) The spraying device in the gas seal system for preventing gas overflow during coal feeding according to this utility model includes a spray box, with oblique nozzles at both ends of the outer wall of the spray box, and straight nozzles evenly arranged between the oblique nozzles at both ends. This design allows steam to be sprayed out at different angles and directions, forming a more uniform and comprehensive steam coverage in the gas furnace chamber, thereby better forming a gas seal layer and improving the effect of preventing gas overflow. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a gas sealing system for isolating coal gas overflow during coal feeding, according to this utility model.

[0020] Figure 2 This is a structural diagram of a spraying device for a coal gas overflow sealing system that isolates coal gas overflow during coal feeding, according to this utility model.

[0021] In the diagram, 1. Coal feeder, 2. Feeding bin, 201. Traction wheel, 202. Annular groove, 203. Sealing ring, 3. Gas furnace chamber, 301. Concentration detector, 302. Second pressure sensor, 4. Bell jar, 5. Steam pipe, 501. Regulating valve, 502. First pressure sensor, 6. Spraying device, 601. Spray box, 602. Angled nozzle, 603. Straight nozzle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0023] like Figure 1-2As shown, this utility model discloses a gas seal system for preventing gas overflow during coal feeding, comprising a coal feeder 1, a feeding bin 2, and a gas furnace bin 3 connected sequentially from top to bottom. A bell jar 4 is embedded between the feeding bin 2 and the gas furnace bin 3. The feeding bin 2 has a conical bottom structure. Four steam pipes 5 are circumferentially connected to the outer wall of the feeding bin 2. The four steam pipes 5 are evenly arranged on the outer wall of the conical bottom of the feeding bin 2. The steam pipes 5 extend along the inner wall of the feeding bin 2 into the gas furnace bin 3. A spraying device 6 is connected to the bottom end of the steam pipe 5 for spraying steam to form a steam seal layer.

[0024] The top of the feeding bin 2 is equipped with a traction wheel 201, which can be operated manually or by a drive motor. The traction wheel 201 is connected to the bell jar 4 through a lead wire and is used to pull the bell jar 4 up and down. The bell jar 4 has an annular groove 202 near the top, and a sealing ring 203 is embedded in the annular groove 202. The sealing ring 203 further enhances the sealing performance when the bell jar 4 covers the gas furnace bin 3, preventing the gas from escaping during processing.

[0025] The steam pipe 5 is equipped with a regulating valve 501 and a first pressure sensor 502. The regulating valve 501 can regulate the pressure of steam passing through the steam pipe 5, and the first pressure sensor 502 can measure the steam pressure passing through the steam pipe 5.

[0026] The gas furnace chamber 3 is equipped with a concentration detector 301 and a second pressure sensor 302 at its top. The concentration detector 301 can detect the gas concentration in the gas furnace chamber 3 to prevent the gas concentration from being too high and not being detected in time when abnormal operating conditions occur. The second pressure sensor 302 is used to measure the gas pressure in the gas furnace when coal is discharged.

[0027] The spraying device 6 includes a spray box 601, which is connected to the steam pipe 5. Both ends of the outer wall of the spray box 601 are provided with angled nozzles 602, and straight nozzles 603 are evenly arranged between the angled nozzles 602 at both ends. The angled nozzles 602 and the straight nozzles 602 cooperate to form a 120° steam seal layer. The four spraying devices 6 ensure that the steam seal layer completely covers the gas furnace chamber 3.

[0028] The regulating valve 501, the first pressure sensor 502, the concentration detector 301, and the second pressure sensor 302 are all electrically connected to a control terminal.

[0029] The sealing ring 203 is made of high-temperature resistant aluminum silicate fiber material. Therefore, the sealing ring 203 will expand under the action of steam to form an elastic sealing ring, which greatly increases the sealing performance when no coal is added.

[0030] Working principle: When coal is added to the gasifier chamber 3, the regulating valve 501 is opened, allowing steam to enter the steam pipe 5. The steam is sprayed through the spraying device 6 to form a steam seal. At this time, the bell jar 4 is pulled up by the traction wheel 201, and the coal feeder 1 begins to add coal to the gasifier chamber 3. During the coal feeding process, the first pressure sensor 502 and the second pressure sensor 302 monitor the steam pressure and gas pressure in real time to keep the pressure difference between the steam pressure and the gas pressure stable. The pressure difference is input in advance into the control terminal, and the control terminal automatically adjusts the pressure. The opening of regulating valve 501 is adjusted to maintain a stable difference between steam pressure and gas pressure. When the concentration detector 301 detects that the gas concentration is too high and exceeds the preset value, a problem occurs in the working condition. At this time, regulating valve 501 directly increases the opening to increase the steam pressure and prevent gas from overflowing from the feeding bin 2. After the coal feeding is completed, the traction wheel 201 lowers the bell jar 4. The sealing ring 203 in the bell jar 4 expands under the action of steam to form an elastic sealing ring, which enhances the sealing performance. Finally, regulating valve 501 is closed to stop the steam supply.

[0031] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A gas-sealing system for preventing coal gas overflow during coal feeding, characterized in that, It includes a coal feeder (1), a feeding bin (2) and a gas furnace bin (3) connected sequentially from top to bottom. A bell jar (4) is embedded between the feeding bin (2) and the gas furnace bin (3). Four steam pipes (5) are connected circumferentially on the outer wall of the feeding bin (2). The steam pipes (5) extend along the inner wall of the feeding bin (2) into the gas furnace bin (3). A spraying device (6) is connected to the bottom end of the steam pipes (5).

2. The gas-sealing system for isolating coal gas overflow during coal feeding according to claim 1, characterized in that, The top of the feeding bin (2) is provided with a traction wheel (201), the traction wheel (201) is connected to the bell jar (4) through a lead wire, and the bell jar (4) has an annular groove (202) near the top, and a sealing ring (203) is embedded in the annular groove (202).

3. A gas-sealing system for isolating coal gas overflow during coal feeding according to claim 2, characterized in that, The steam pipe (5) is equipped with a regulating valve (501) and a first pressure sensor (502).

4. A gas-sealing system for isolating coal gas overflow during coal feeding according to claim 3, characterized in that, The gas furnace chamber (3) is equipped with a concentration detector (301) and a second pressure sensor (302) at the top inside.

5. A gas-sealing system for isolating coal gas overflow during coal feeding according to claim 4, characterized in that, The spraying device (6) includes a spray box (601), which is connected to the steam pipe (5). Both ends of the outer wall of the spray box (601) are provided with oblique nozzles (602), and straight nozzles (603) are uniformly arranged between the two oblique nozzles (602).

6. A gas-sealing system for isolating coal gas overflow during coal feeding according to claim 5, characterized in that, The regulating valve (501), the first pressure sensor (502), the concentration detector (301), and the second pressure sensor (302) are all electrically connected to a control terminal.

7. A gas-sealing system for preventing coal gas overflow during coal feeding according to claim 6, characterized in that, The sealing ring (203) is made of high-temperature resistant aluminum silicate fiber material.

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