Multifunctional safety protection device for gas pipeline

Abstract

The application discloses a kind of multifunctional safety protection device of gas pipeline, it is related to gas safety protection equipment technical field, including safety protection tank body, safety protection tank body is equipped with tank body gas inlet and tank body gas outlet, safety protection tank body is equipped with vortex separation passage, the channel inlet of vortex separation passage is connected with tank body gas inlet, gas in vortex separation passage is in the form of vortex flow, the bottom of vortex separation passage is equipped with channel slag outlet, safety protection tank body is equipped with sealing liquid, the inside of vortex separation passage is connected with sealing liquid, the top of safety protection tank body is equipped with tank body explosion vent, and explosion vent is equipped with explosion vent device, the bottom of safety protection tank body is equipped with tank body slag outlet, and tank body slag outlet is equipped with slag removal device.The application integrates water seal, explosion vent, dust removal, slag removal, steam-water separation function, reduces pipeline leakage point, improves gas pipeline operation safety, reduces installation and operation cost.

Description

Technical Field

[0001] This invention relates to the field of gas safety protection equipment technology, and in particular to a multi-functional safety protection device for gas pipelines. Background Technology

[0002] During the operation of a coal mine gas extraction system, the gas flow carries a large amount of underground water, coal dust, coal slime particles, rock cuttings and other impurities. Conventional gas pipeline systems require multiple independent devices such as steam-water separators, water seal flame arrestors, explosion relief devices, and slag discharge tanks to be installed in sections. The series connection of multiple individual devices occupies a large amount of installation space in the roadway, increases the number of pipeline interfaces, significantly increases the number of gas leakage points, and makes on-site installation, inspection, and maintenance procedures cumbersome. The overall construction and operation costs are high, the timing of the operation of each device cannot be coordinated, and the overall protection effectiveness is poor.

[0003] Therefore, there is an urgent need in this field for a multifunctional safety protection device for gas pipelines to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-functional safety protection device for gas pipelines to solve the problems existing in the prior art. It has high overall safety and low construction and maintenance costs.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention discloses a multifunctional safety protection device for gas pipelines, comprising a safety protection tank with a gas inlet and a gas outlet. A vortex separation channel is provided inside the safety protection tank, with its inlet connected to the gas inlet. Gas entering the vortex separation channel flows in a vortex pattern. A slag outlet is located at the bottom of the vortex separation channel. A sealing liquid is contained within the safety protection tank. The height of the vortex separation channel outlet is higher than the liquid level of the sealing liquid, while the height of the slag outlet is lower than the liquid level of the sealing liquid. The interior of the vortex separation channel is connected to the sealing liquid. A tank explosion vent is located at the top of the safety protection tank, equipped with an explosion venting device. A slag discharge port is located at the bottom of the safety protection tank, equipped with a slag discharge device.

[0006] Preferably, the safety protection tank body consists of an upper end cap, a cylindrical body, and a lower end cap, from top to bottom.

[0007] Preferably, the vortex separation channel is composed of multiple baffles, and the vortex separation channel includes a slag sedimentation section and a steam-water separation section.

[0008] Preferably, the side wall of the safety protection tank is provided with an observation window.

[0009] Preferably, the side wall of the safety protection tank is provided with a water injection pipe and a water outlet pipe, with the water injection pipe located above the water outlet pipe.

[0010] Preferably, the explosion relief device is an explosion relief disc or an explosion relief valve.

[0011] Preferably, the slag discharge device includes a first slag discharge valve, a slag discharge buffer chamber, and a second slag discharge valve, wherein the slag discharge buffer chamber is located between the first slag discharge valve and the second slag discharge valve.

[0012] Preferably, the safety protection tank is equipped with a pressure sensor and a liquid level sensor.

[0013] Preferably, the gas outlet of the tank is equipped with a demister mesh.

[0014] Preferably, the top of the safety protection tank is provided with lifting lugs, and the bottom of the safety protection tank is provided with a support bracket.

[0015] The present invention achieves the following technical effects compared to the prior art: This invention provides a multi-functional safety protection device for gas pipelines, with highly integrated functions: a single device can simultaneously achieve five functions: water seal fire prevention, overpressure explosion relief, vortex flow dust removal, gravity slag discharge, and baffle-type steam-water separation. It replaces the traditional scheme of multiple independent devices connected in series, significantly reduces pipeline flange interfaces, reduces the risk of gas leakage, reduces the space occupied by roadway installation, and simplifies the on-site installation process. Excellent separation and protection performance: The vortex separation channel enhances the gas-solid and gas-liquid separation effects. Coal slag settles in the slag outlet of the vortex separation channel and is then discharged through the slag outlet, avoiding the accumulation of coal slag that could cause water seal failure and pipeline blockage. The dual gas-water separation structure of baffle plate + liquid surface capture significantly reduces the water carryover rate of gas and prevents subsequent pipeline water accumulation and freezing blockage. High operational safety: The dual-valve slag discharge design ensures that the water seal does not fail during slag discharge operations; the pressure-bearing structure of the safety protection tank, combined with the explosion relief device at the top, can effectively release the explosion shock wave, and the water seal structure blocks the backfire of the flame. Multiple protections ensure the safe operation of the gas pipeline network. Convenient operation and maintenance: The integrated structure centrally monitors liquid level and pressure, and slag discharge and water replenishment operations are completed on a single safety protection tank, reducing the workload of multiple equipment maintenance and lowering the daily operation and maintenance cost of coal mine gas extraction systems; High versatility: The size of the safety protection tank, the design height of the water seal, and the pressure of the explosion relief action can be adjusted according to different gas pipeline diameters and extraction pressure conditions, making it suitable for various gas extraction scenarios such as low negative pressure underground and high negative pressure on the surface. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the multi-functional safety protection device for gas pipelines according to an embodiment of the present invention; Figure 2 This is a partial enlarged view of the vortex separation channel in the multifunctional safety protection device for gas pipelines according to an embodiment of the present invention; In the diagram: 1-Safety protection tank; 101-Tank gas inlet; 102-Tank gas outlet; 103-Tank explosion relief port; 104-Tank slag discharge port; 105-Upper head; 106-Cylinder body; 107-Lower head; 108-Water injection pipe; 109-Water outlet pipe; 110-Lifting lug; 111-Support bracket; 2-Vortex separation channel; 201-Channel inlet; 202-Channel slag discharge port; 203-Channel outlet; 204-Slag sedimentation section; 205-Gas-water separation section; 206-First baffle plate; 207-Second baffle plate; 208-Third baffle plate; 209-Fourth baffle plate; 210-Fifth baffle plate; 3-Sealing liquid; 4-Slag discharge device; 401-First slag discharge valve; 402-Slag discharge buffer chamber; 403-Second slag discharge valve. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The purpose of this invention is to provide a multi-functional safety protection device for gas pipelines to solve the problems existing in the prior art. It has high overall safety and low construction and maintenance costs.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1-2As shown, this embodiment provides a multi-functional safety protection device for gas pipelines, including a safety protection tank 1. The safety protection tank 1 has a gas inlet 101 and a gas outlet 102, located on opposite sides of the safety protection tank 1. The height of the gas outlet 102 is higher than that of the gas inlet 101. A vortex separation channel 2 is provided inside the safety protection tank 1. The inlet 201 of the vortex separation channel 2 is connected to the gas inlet 101. The vortex separation channel 2 has a vortex-shaped or near-vortex-shaped structure, causing the gas entering the vortex separation channel 2 to flow in a vortex pattern. A slag outlet 202 is provided at the bottom of the vortex separation channel 2. A sealing liquid 3, which can be water, is provided inside the safety protection tank 1. The height of the channel outlet 203 of the vortex separation channel 2 is higher than the liquid level of the sealing liquid 3, while the height of the channel slag outlet 202 is lower than the liquid level of the sealing liquid 3. The interior of the vortex separation channel 2 is connected to the sealing liquid 3, and the sealing liquid 3 can enter the vortex separation channel 2 through the channel slag outlet 202, making the liquid level in the vortex separation channel 2 equal to the liquid level in the safety protection tank 1. The top of the safety protection tank 1 is equipped with a tank explosion vent 103, which is equipped with an explosion venting device. When a deflagration occurs inside the gas pipeline and the pressure inside the safety protection tank 1 rises sharply beyond the set safety threshold, the explosion venting device at the top opens, quickly releasing the high-pressure shock wave inside the safety protection tank 1, limiting the transmission of the explosion pressure to the forward and backward pipelines, and protecting the entire gas extraction pipeline network. The bottom of the safety protection tank 1 is provided with a tank slag discharge port 104, and a slag discharge device 4 is provided at the tank slag discharge port 104. When too much coal slag accumulates at the bottom of the safety protection tank 1, the slag discharge device 4 can be opened to discharge the coal slag.

[0022] In actual use, the gas inlet 101 and gas outlet 102 of the safety protection tank 1 are installed on the gas pipeline. The gas flow containing water and coal dust slag from the front pipeline of the safety protection tank 1 enters the vortex separation channel 2 through the gas inlet 101 and the channel inlet 201. The gas flow moves in a vortex flow along the inner wall of the vortex separation channel 2. Under the combined action of centrifugal force and gravity, large particles of coal slag and large droplets are thrown to the inner wall of the vortex separation channel 2 and fall to the bottom of the safety protection tank 1 through the slag outlet 202. The airflow deflects upward, and fine water mist and dust are adsorbed by the water seal liquid surface inside the safety protection tank 1, completing one gas-water separation and dust removal purification. After purification, the gas flows from the gas outlet 102 into the downstream gas pipeline. The constant height of the sealed liquid 3 inside the safety protection tank 1 forms a water seal barrier, blocking the reverse propagation path of backfire.

[0023] In this embodiment, the safety protection tank 1 consists of an upper end cap 105, a cylindrical body 106, and a lower end cap 107 from top to bottom. The upper end cap 105 is a conical structure with a diameter that gradually increases from top to bottom, and the lower end cap 107 is a conical structure with a diameter that gradually decreases from top to bottom. The cylindrical body 106 is a cylindrical structure. The upper end of the cylindrical body 106 is welded and fixed to the lower end of the upper end cap 105, and the lower end of the cylindrical body 106 is welded and fixed to the upper end of the lower end cap 107.

[0024] In this embodiment, as Figure 2 As shown, the vortex separation channel 2 is composed of multiple baffles, specifically a first baffle 206, a second baffle 207, a third baffle 208, and a fourth baffle 209. Alternatively, it can also be the inner wall of the safety protection tank 1 between the first baffle 206, the second baffle 207, the third baffle 208, and the fourth baffle 209 (e.g., Figure 2 The inner wall of the safety protection tank 1 to the left of the first baffle plate 206 and the third baffle plate 208 is considered part of the vortex separation channel 2. The first baffle plate 206, the second baffle plate 207, the third baffle plate 208, and the fourth baffle plate 209 are all welded to the inner wall of the safety protection tank 1. The first baffle plate 206 is located at the top of the vortex separation channel 2. The upper end of the second baffle plate 207 is connected to the lower surface of the first baffle plate 206. The third baffle plate 208 is inclined and located to the left of the second baffle plate 207. The fourth baffle plate 209 is a V-shaped plate located to the right of the second baffle plate 207. The slag outlet 202 is located between the third baffle plate 208 and the fourth baffle plate 209. The vortex separation channel 2 includes a slag sedimentation section 204 and a steam-water separation section 205. The slag sedimentation section 204 is the part of the vortex separation channel 2 below the water level. Figure 2 It is easy to see that the portion of the vortex separation channel 2 below the water level has an approximate vortex structure, causing the gas-liquid mixture in this section to exhibit a vortex flow state. Large particles of coal slag and liquid droplets are thrown towards the inner wall of the vortex separation channel 2 under the action of centrifugal force, and slide down the inner wall of the vortex separation channel 2 under the action of gravity to the slag outlet 202 of the channel below. The gas-water separation section 205 is the part to the right of the third baffle 208 and above the water level. The upper end of the fourth baffle 209 and the right end of the first baffle 206 can capture fine water mist and dust, completing gas-water separation and dust removal purification.

[0025] In addition, from Figure 2 As can be seen, an inclined fifth baffle 210 is provided at the gas outlet 102 of the tank, which is used to further capture fine water mist and dust.

[0026] In this embodiment, the side wall of the safety protection tank 1 is provided with an observation window, and a transparent plate is installed at the observation window. The plate is made of materials including but not limited to glass or other materials. The staff can observe the internal water level of the safety protection tank 1 through the observation window.

[0027] In this embodiment, the side wall of the safety protection tank 1 is provided with a water inlet pipe 108 and a water outlet pipe 109. Control valves are provided on the water inlet pipe 108 and the water outlet pipe 109 to prevent leakage of the sealing liquid 3. The water inlet pipe 108 is located above the water outlet pipe 109. When the liquid level of the sealing liquid 3 in the safety protection tank 1 is too high, the control valve on the water outlet pipe 109 can be opened to drain excess water. When the liquid level of the sealing liquid 3 in the safety protection tank 1 is too low, the control valve on the water inlet pipe 108 can be opened. The end of the water inlet pipe 108 away from the safety protection tank 1 is connected to a water source, allowing the water source to supply water into the safety protection tank 1 through the water inlet pipe 108, thereby increasing the internal water level of the safety protection tank 1.

[0028] By using the water injection pipe 108 and the water outlet pipe 109, the liquid level of the sealed liquid 3 in the safety protection tank 1 can be kept at a predetermined height. When backfire or flame propagation occurs in the downstream pipeline, the water layer inside the safety protection tank 1 prevents the flame from spreading directly to the upstream pipeline, thus achieving water seal fire isolation.

[0029] In this embodiment, the explosion relief device is an explosion relief disc or an explosion relief valve. When the gas pressure in the safety protection tank 1 exceeds the preset safety threshold, the explosion relief device opens to release the high pressure, thereby achieving pipeline overpressure explosion relief protection.

[0030] In this embodiment, the slag discharge device 4 includes a first slag discharge valve 401, a slag discharge buffer chamber 402, and a second slag discharge valve 403. The slag discharge buffer chamber 402 is located between the first slag discharge valve 401 and the second slag discharge valve 403. When slag discharge is required, the first slag discharge valve 401 is opened first, and the coal slag located at the slag discharge port 104 of the tank will enter the slag discharge buffer chamber 402 through the first slag discharge valve 401. Then, the first slag discharge valve 401 is closed and the second slag discharge valve 403 is opened, thereby realizing the discharge of coal slag. The advantage of this setting is that it avoids the rapid drop in the water level of the sealing liquid 3 inside the safety protection tank 1 caused by direct discharge from a single valve, thereby ensuring that the water seal flame arrestor function does not fail during the slag discharge process.

[0031] In this embodiment, the safety protection tank 1 is equipped with a pressure sensor and a liquid level sensor. In order to facilitate the installation of the pressure sensor and the liquid level sensor, the safety protection tank 1 is equipped with an installation interface corresponding to the pressure sensor and the liquid level sensor.

[0032] Furthermore, the pressure sensor, level sensor, explosion relief device (the explosion relief valve is an electrically controlled explosion relief valve), and slag discharge device 4 (both the first slag discharge valve 401 and the second slag discharge valve 403 are electrically controlled valves) can all be electrically connected to the control device. The control device can be an existing back-end host or PLC controller, etc. The pressure sensor can monitor the internal pressure of the safety protection tank 1 in real time. If the pressure is too high, the explosion relief device can be activated in time. The level sensor can monitor the internal liquid level of the safety protection tank 1 in real time. If the internal liquid level of the safety protection tank 1 is too high or too low, the control valve on the outlet pipe 109 or the main water pipe can be opened to maintain the liquid level in the safety protection tank 1.

[0033] In this embodiment, a defoaming mesh is provided at the gas outlet 102 of the tank. The mesh structure can perform secondary steam-water separation on the gas flow after cyclone purification, and remove the fine water mist carried in the gas flow.

[0034] In this embodiment, the top of the safety protection tank 1 is provided with lifting lugs 110 for easy lifting and thus convenient handling of the safety protection tank 1. The bottom of the safety protection tank 1 is provided with a support bracket 111 to support the safety protection tank 1 and prevent the safety protection tank 1 from directly contacting the ground.

[0035] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, 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, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0038] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0039] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0040] It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0041] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.

[0042] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0043] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A multi-functional safety protection device for gas pipelines, characterized in that: The system includes a safety protection tank (1), which has a gas inlet (101) and a gas outlet (102). A vortex separation channel (2) is located inside the safety protection tank (1). The inlet (201) of the vortex separation channel (2) is connected to the gas inlet (101). The gas entering the vortex separation channel (2) flows in a vortex pattern. A slag outlet (202) is located at the bottom of the vortex separation channel (2). A sealing liquid (3) is located inside the safety protection tank (1). The height of the channel outlet (203) of the channel (2) is higher than the liquid level of the sealing liquid (3), the height of the channel slag outlet (202) is lower than the liquid level of the sealing liquid (3), the interior of the vortex separation channel (2) is connected to the sealing liquid (3), the top of the safety protection tank (1) is provided with a tank explosion vent (103), the explosion vent (103) is provided with an explosion venting device, the bottom of the safety protection tank (1) is provided with a tank slag discharge port (104), the slag discharge port (104) is provided with a slag discharge device (4).

2. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The safety protection tank (1) consists of an upper end cap (105), a cylindrical body (106), and a lower end cap (107) from top to bottom.

3. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The vortex separation channel (2) is composed of multiple baffles and includes a slag sedimentation section (204) and a steam-water separation section (205).

4. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The safety protection tank (1) has an observation window on its side wall.

5. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The safety protection tank (1) is provided with a water injection pipe (108) and a water outlet pipe (109) on its side wall, with the water injection pipe (108) located above the water outlet pipe (109).

6. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The explosion relief device is an explosion relief disc or an explosion relief valve.

7. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The slag discharge device (4) includes a first slag discharge valve (401), a slag discharge buffer chamber (402), and a second slag discharge valve (403), wherein the slag discharge buffer chamber (402) is located between the first slag discharge valve (401) and the second slag discharge valve (403).

8. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The safety protection tank (1) is equipped with a pressure sensor and a liquid level sensor.

9. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The gas outlet (102) of the tank is equipped with a demister mesh.

10. The multi-functional safety protection device for gas pipelines according to claim 1, characterized in that: The top of the safety protection tank (1) is provided with a lifting lug (110), and the bottom of the safety protection tank (1) is provided with a support bracket (111).

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