Pressure regulating box with frozen and blocked gas pipeline

Abstract

The utility model discloses a pressure regulating box with a frozen and blocked gas pipeline, which comprises a pressure regulating valve group, a pressure regulating valve group, a pressure regulating valve group, a pressure regulating valve group and a pressure regulating valve group, the buffer pipe group comprises a mixing cylinder as well as a first branch guide conical ring and a second shunt ring which are fixed on the inner side of the mixing cylinder, the first branch guide conical ring and the second shunt ring are coaxially arranged with the mixing cylinder, and core runners are arranged on the inner sides of the first branch guide conical ring and the second shunt ring; and outer runners positioned on the inner sides of the first branch guide conical ring, the second branch guide conical ring and the mixing barrel are arranged on the peripheries of the first branch guide conical ring and the second branch guide conical ring. According to the utility model, through the shunting and convection blending effect of the buffer pipe group, the uniformity of fuel gas flowing is improved, and the phenomenon of fuel gas icing or hydrate blockage caused by over-low local temperature is avoided; a dynamic adjustable inhibitor filling system is adopted, the injection amount of an inhibitor can be automatically adjusted according to the fuel gas conveying condition, and accurate control is achieved; the anti-freezing and anti-blocking protective agent has remarkable advantages in the aspect of anti-freezing and anti-blocking protection of a gas conveying pipeline, the generation risk of hydrates is effectively reduced, and the stability and safety of gas conveying are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of pressure regulating box with gas pipeline freeze block. BACKGROUND

[0002] Gas is widely used in industrial production, city gas supply and power generation as a clean energy. However, in cold or high humidity environment, water vapor inside gas pipeline is easy to condense, and combine with hydrocarbons in gas under low temperature condition to form solid hydrate. The generation of hydrate will gradually block the pipeline, affect the normal operation of gas transmission, and even cause abnormal pressure rise of pipeline, increase safety hazard. Especially in high-pressure gas transmission process, gas throttling will produce Joule-Thomson effect, which will further reduce the temperature of gas, thereby accelerating the formation of hydrate and increasing the risk of gas pipeline freeze block.

[0003] The existing gas pipeline anti-freeze block technology mainly adopts the following methods:

[0004] Heating insulation method: improve the temperature of gas pipeline by pipeline heating, external insulation layer or heating equipment to prevent the formation of hydrate. However, this method has problems such as high energy consumption, high operation cost and complex installation, especially in long-distance gas transmission system, it is difficult to achieve efficient control.

[0005] Pressure control method: adjust the pressure of gas pipeline to keep it out of the hydrate formation pressure range. However, in practical application, the adjustment of gas pressure is limited by pipeline operating conditions, and cannot fundamentally eliminate the possibility of hydrate formation.

[0006] Chemical inhibitor injection method: inject methanol, ethylene glycol, diethylene glycol and other chemical inhibitors into gas transmission system to reduce the condensation point of water vapor in gas and destroy the crystal structure of hydrate, so that it cannot exist stably. This method is widely used in gas transmission field, but the existing inhibitor injection device generally has problems such as difficult precise control, low mixing efficiency and low automation level.

[0007] At present, the common inhibitor injection equipment on the market mostly adopts fixed flow or manual control mode, which cannot dynamically adjust the injection amount according to gas flow, temperature change and other working conditions, resulting in insufficient or excessive use of inhibitor, affecting the anti-freeze block effect. In addition, traditional injection equipment does not fully consider the gas flow characteristics, resulting in uneven distribution of inhibitor in the pipeline, thereby reducing the hydrate inhibition efficiency. Therefore, there is an urgent need for a pressure regulating box that can automatically and accurately adjust the injection amount of inhibitor and optimize the gas flow characteristics to improve the reliability and efficiency of gas pipeline anti-freeze block.

[0008] Therefore, aiming at the existing problems, the present application provides a pressure regulating tank with gas pipeline frozen blockage to solve the existing problems, and achieve the purposes of solving problems and improving practical value. Technical content

[0009] The present application aims to solve the technical problems in the prior art or related art.

[0010] The present application specifically relates to a pressure regulating tank with gas pipeline frozen blockage, aiming to solve the problem of hydrate formation caused by low-temperature environment in the gas conveying process, and improve the stability and safety of gas conveying.

[0011] The present application provides a pressure regulating tank with gas pipeline frozen blockage, which comprises a pressure regulating valve group, a buffer pipe group and an inhibitor filling assembly. The pressure regulating valve group is used for pressure regulation of gas to ensure that the gas enters the buffer pipe group at a stable pressure. The buffer pipe group comprises a mixing cylinder, a first diversion cone ring and a second diversion ring, wherein the first diversion cone ring and the second diversion ring are coaxially arranged with the mixing cylinder and are respectively provided with a core flow channel and an outer flow channel. After the gas enters the mixing cylinder, part of the gas flows linearly through the core flow channel, and the other part of the gas flows along the outer flow channel and impacts the gas flow in the core flow channel radially, thereby forming an impact blending effect. Meanwhile, a bundled flow channel is arranged between the first diversion cone ring and the second diversion ring, so that the gas forms efficient mixing between the multiple flow channels, improving the flow stability and mixing uniformity of the gas.

[0012] The inhibitor filling assembly comprises a filling pipe, a wire column rod, a screw sleeve tooth, a driving box, a driving motor and a piston plate. The driving motor drives the screw sleeve tooth to rotate, and through the screw transmission of the wire column rod, the linear motion of the piston plate is realized, so that the anti-freezing inhibitor in the filling pipe is extruded into the inside of the mixing cylinder. The end of the filling pipe is provided with a plurality of injection holes to ensure that the inhibitor is uniformly distributed in the mixing cylinder and fully mixed with the gas flow. The present application adopts a remote control system to control the driving motor, so as to realize the automatic and accurate addition of the inhibitor, and the injection amount of the inhibitor can be dynamically adjusted according to the gas flow rate, temperature and other parameters.

[0013] The present application has the following advantages:

[0014] Through the diversion and impact blending effect of the buffer pipe group, the uniformity of gas flow is improved, and the phenomenon of gas icing or hydrate blockage caused by excessively low local temperature is avoided;

[0015] The dynamically adjustable inhibitor filling system can automatically adjust the injection amount of the inhibitor according to the gas conveying condition, and realize precise control;

[0016] The driving motor is remotely controlled, which can be remotely operated to realize the automatic addition of the anti-freezing inhibitor, and improve the convenience and safety of use.

[0017] The compact structure and convenient installation are suitable for various gas conveying systems, especially for gas conveying pipelines in low-temperature and high-humidity environments.

[0018] Therefore, the anti-freezing and anti-blocking protection of the gas conveying pipeline is improved, the generation risk of hydrates is reduced, and the stability and safety of gas conveying are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Fig. 1 is a schematic diagram of the overall structure of an embodiment of the utility model;

[0020] Figure 2 Fig. 2 is a schematic diagram of the installation structure of the buffer pipe group and the inhibitor filling assembly of an embodiment of the utility model;

[0021] Figure 3 Fig. 3 is a schematic diagram of the cross-sectional structure of the buffer pipe group of an embodiment of the utility model;

[0022] Figure 4 Fig. 4 is a schematic diagram of the cross-sectional structure of the inhibitor filling assembly of an embodiment of the utility model.

[0023] Reference signs:

[0024] 100, pressure regulating valve group;

[0025] 200, buffer pipe group; 210, mixing cylinder; 220, first flow dividing cone ring; 230, second flow dividing ring; 201, outer flow channel; 202, core flow channel; 221, bundled flow channel;

[0026] 300, inhibitor filling assembly; 310, filling pipe; 320, wire column rod; 330, screw sleeve tooth; 311, driving box; 312, driving motor; 321, piston plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail below in combination with specific embodiments and with reference to the drawings.

[0028] It is understood that the above description is only exemplary, and is not intended to limit the scope of the utility model.

[0029] The following will be described in combination with the drawings Figures 1-4 Some embodiments of the utility model provide a pressure regulating box with gas pipeline freezing and blocking.

[0030] This utility model provides a pressure regulating box for gas pipeline freezing blockage, including a pressure regulating valve group 100, a buffer pipe group 200 and an inhibitor filling assembly 300.

[0031] Pressure regulating valve assembly 100: Used to regulate the pressure of gas entering the gas pipeline, so that the gas enters the buffer pipe assembly 200 within the set pressure range.

[0032] Buffer tube assembly 200: The buffer tube assembly 200 includes a mixing cylinder 210, a first guide cone ring 220, and a second flow divider ring 230, wherein:

[0033] The mixing cylinder 210 is used to contain and guide the flow of gas; the first guide cone ring 220 and the second flow divider ring 230 are fixed inside the mixing cylinder 210 and are arranged coaxially with the mixing cylinder 210; the inner side of the first guide cone ring 220 and the second flow divider ring 230 is provided with a core flow channel 202, through which the gas flows in a straight line; the outer periphery of the first guide cone ring 220 and the second flow divider ring 230 forms an outer flow channel 201 with the mixing cylinder 210, through which the gas flows along the outer flow channel 201 through the inner wall of the mixing cylinder 210 and radially impacts the gas flow in the core flow channel 202, thereby forming an impact mixing effect.

[0034] A cluster flow channel 221 is provided between the first guide cone ring 220 and the second flow splitting ring 230 to connect the core flow channel 202 and the outer flow channel 201, so that the gas can be efficiently mixed between multiple flow channels, enhance the convection effect, and improve the flow stability and mixing uniformity of the gas.

[0035] Inhibitor delivery kit 300:

[0036] The inhibitor dispensing assembly 300 includes a dispensing tube 310, a lead screw 320, a threaded sleeve 330, a drive box 311, a drive motor 312, and a piston plate 321. The threaded sleeve 330 is rotatably sleeved on the surface of the lead screw 320. The drive motor 312 drives the threaded sleeve 330 to rotate, and through the threaded transmission between the threaded sleeve 330 and the lead screw 320, the linear movement of the lead screw 320 within the drive box 311 and the dispensing tube 310 is realized.

[0037] The movement of the screw rod 320 drives the piston plate 321 to move within the filling pipe 310, thereby squeezing the antifreeze inhibitor into the mixing cylinder 210. The end of the filling pipe 310 is provided with multiple injection holes facing the inside of the mixing cylinder 210 to ensure that the inhibitor can be evenly distributed within the mixing cylinder 210 and fully mixed with the gas flow.

[0038] Specifically, the driving motor 312 drives the screw sleeve teeth 330 to rotate, and through the threaded transmission between the screw sleeve teeth 330 and the wire column rod 320, the linear motion of the wire column rod 320 in the inside of the driving box 311 and the filling pipe 310 is realized; the wire column rod 320 pushes the piston plate 321, so that the antifreeze inhibitor in the filling pipe 310 is extruded into the mixing cylinder 210, and the blending effect of the antifreeze inhibitor and the fuel gas is realized.

[0039] Inhibitor injection and control system

[0040] The antifreeze inhibitor can be selected from methanol or diethylene glycol, so as to absorb the water in the fuel gas, reduce the water dew point, block the generation of hydrate, and prevent the fuel gas from being blocked in the pipeline in a low-temperature environment. The linear motion stroke of the wire column rod 320 can be dynamically adjusted according to the flow rate and temperature of the fuel gas, so as to control the injection amount of the inhibitor. The driving motor 312 is a stepping motor or a servo motor, which can accurately adjust the injection amount of the inhibitor according to the external control instruction. The end of the driving motor 312 is electrically connected to a remote control system, and the automatic and accurate addition of the inhibitor can be realized through remote operation.

[0041] In another preferred embodiment, the converging flow channel 221 between the first flow dividing cone ring 220 and the second flow dividing ring 230 can be provided with a variable-diameter passage, so as to automatically adjust the fuel gas flow distribution according to the different fuel gas pressures, and improve the blending effect. In addition, a flow guide boss can be added to the inner wall of the mixing cylinder 210, so as to enhance the radial impact mixing effect and improve the contact efficiency of the fuel gas and the inhibitor.

[0042] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pressure regulating tank with frozen gas line blockage, characterized by, The utility model relates to a kind of gas anti-freeze system, comprising: A pressure regulating valve group (100) is used to regulate the pressure of gas entering a gas pipeline; A buffer tube group (200) includes a mixing cylinder (210), a first conical ring (220) and a second conical ring (230) fixed inside the mixing cylinder (210), the first conical ring (220) and the second conical ring (230) are coaxially arranged with the mixing cylinder (210) and have a core flow channel (202) inside, the outer periphery of the first conical ring (220) and the second conical ring (230) has an outer flow channel (201) between the first conical ring (220) and the second conical ring (230) and the inside of the mixing cylinder (210), the gas enters the mixing cylinder (210) through the pressure regulating valve group (100), part of the gas flows straight through the core flow channel (202) inside the first conical ring (220) and the second conical ring (230), and the other part of the gas flows along the outer flow channel (201) and impacts the gas flow in the core flow channel (202) radially, thereby forming an impact blending effect; An inhibitor injection assembly (300) includes an injection tube (310), a wire column rod (320), a screw thread tooth (330), a drive box (311), a drive motor (312) and a piston plate (321), the screw thread tooth (330) is rotatably connected to the surface of the wire column rod (320), wherein: The drive motor (312) drives the screw thread tooth (330) to rotate, and the wire column rod (320) moves linearly inside the drive box (311) and the injection tube (310) through the threaded transmission between the screw thread tooth (330) and the wire column rod (320), the piston plate (321) is pushed by the wire column rod (320), the anti-freeze inhibitor in the injection tube (310) is injected into the mixing cylinder (210), and the blending effect of the anti-freeze inhibitor and the gas is realized.

2. The pressure regulating tank with gas line freeze-up according to claim 1, wherein, The first conical ring (220) and the second conical ring (230) are provided with a bundled flow channel (221) for communication between the core flow channel (202) and the outer flow channel (201), to form a high-efficiency convection mixing efficiency.

3. The pressure regulating tank with gas line freeze-up according to claim 1, wherein, The linear motion stroke of the wire column rod (320) can be dynamically adjusted according to the gas flow rate and temperature, to control the injection amount of the inhibitor.

4. The pressure regulating tank with gas line freeze-up according to claim 1, wherein, The end of the injection tube (310) is provided with a plurality of injection holes opposite to the inside of the mixing cylinder (210), to ensure that the inhibitor is evenly distributed in the mixing cylinder (210).

5. The pressure regulating tank with gas line freeze-up according to claim 1, wherein, The anti-freeze inhibitor is methanol or diethylene glycol, to absorb the moisture in the gas, reduce the dew point of water, and block the formation of hydrate.

6. The pressure regulating tank with gas line freeze-up according to claim 1, wherein, The drive motor (312) is a stepper motor or a servo motor, which can accurately adjust the injection amount of the inhibitor according to external control instructions.

7. The pressure regulating tank with gas line freeze-up according to claim 1, wherein The end of the drive motor (312) is electrically connected with a remote control system, to realize automatic and accurate addition of the inhibitor through remote operation.

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