Low-pressure gas hydrogen recycling device in diesel hydrogenation preparation process

Abstract

The invention discloses a low-pressure gas hydrogen recycling device in a diesel hydrogenation preparation process, belongs to the technical field of low-pressure gas recycling, and provides the following scheme that the low-pressure gas hydrogen recycling device comprises a desulfurization mechanism, and a pressurization mechanism is arranged on the desulfurization mechanism; the hydraulic assembly is driven by the control assembly to conduct hydraulic transmission, so that the sealing plug can move, the sealing plug moves to conduct pressurization operation on a closed space formed by the spiral flow guide channel and the spray head set, and after pressurization is conducted for a period of time, the exhaust assembly makes contact with a baffle to be automatically opened for exhausting; the connecting assembly drives the exhaust assembly to be opened to realize flowing of low-pressure separation gas, so that the control assembly is matched with the hydraulic assembly to drive the sealing plug to switch between pressurization and depressurization in a reciprocating manner, gas-liquid mass transfer is accelerated during pressurization, and more low-pressure separation gas enters a liquid phase to react with a desulfurizing agent; and during pressure reduction, part of gas dissolved in the liquid phase escapes to break original gas-liquid balance and promote more low-pressure gas to enter the liquid phase from the gas phase, so that the mass transfer efficiency is further improved, and the desulfurization reaction is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of low-pressure gas recovery, and particularly to a device for hydrogen recovery and utilization of low-pressure gas in the process of diesel hydrogenation preparation. Background Art

[0002] Diesel is a product obtained after the atmospheric fractionation of petroleum. In order to improve the performance of diesel, in the process of diesel processing, a hydrogenation process is generally introduced to reduce the contents of sulfur, nitrogen, oxygen, and olefins in diesel and improve the stability of the product.

[0003] During the production process of a diesel hydrogenation unit, a part of the low-pressure gas is generated. Currently, this part of the low-pressure gas is sent to the fuel gas pipeline network and enters the heating furnace for combustion. The hydrogen in the low-pressure gas fails to be effectively utilized, which is very regrettable; moreover, the volumetric calorific value of hydrogen is relatively low, and the flame is floating and divergent during combustion, which is extremely likely to cause the flame to hit the furnace tubes and the temperature of the upper part of the furnace to be too high, affecting the safe production of the unit.

[0004] Chinese Patent with the application number CN201721908972.6 discloses a low-pressure gas desulfurization system. Although it can improve the desulfurization effect of low-pressure gas to a certain extent, in the process of desulfurization using an absorbent, the low-pressure gas is usually introduced from the middle of the desulfurization tower and flows upward in the tower, making reverse contact with the desulfurizing agent sprayed downward from top to bottom and reacting. The current process mostly relies on a single-layer or double-layer spraying structure to implement desulfurization treatment, and the desulfurizing agent is directly injected into the desulfurization reactor along the feeding pipe by a delivery pump. However, this simple delivery and spraying method makes it difficult for the desulfurizing agent to be evenly dispersed in the reactor and unable to be fully mixed with the low-pressure gas. As a result, the contact area and contact time between the low-pressure gas and the desulfurizing agent are limited, which not only leads to low utilization rate of the desulfurizing agent and a large amount of waste, but also results in poor desulfurization effect and significantly reduced efficiency. In addition, due to the relatively high temperature of the low-pressure gas itself, it will have a negative impact on the solubility and absorption capacity of the absorbent. In a high-temperature environment, the absorption capacity of the absorbent for sulfur dioxide weakens, further exacerbating the problem of insufficient desulfurization efficiency and making it difficult to meet the increasingly strict desulfurization process requirements.

[0005] In view of the above problems, the present invention document proposes a device for hydrogen recovery and utilization of low-pressure gas in the process of diesel hydrogenation preparation. Summary of the Invention

[0006] The object of the present invention is to solve the problems that in the process of desulfurization using an absorbent, it is difficult for the desulfurizer to be evenly dispersed in the reactor and fully mixed with the low-pressure gas, resulting in insufficient contact between the low-pressure gas and the desulfurizer, waste of the desulfurizer, low utilization rate, poor desulfurization effect, reduced desulfurization efficiency, and the high temperature of the low-pressure gas will affect the solubility and absorption capacity of the absorbent and reduce the absorption efficiency of the absorbent for sulfur dioxide. A device for recycling low-pressure gas hydrogen in the process of diesel hydrogenation preparation is proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical scheme: A device for recycling low-pressure gas hydrogen in the process of diesel hydrogenation preparation, including a desulfurization mechanism, and a pressurization mechanism is arranged on the desulfurization mechanism; The desulfurization mechanism includes a desulfurization tank, a conveying assembly is arranged on the desulfurization tank, the conveying assembly includes a liquid inlet pipe, the liquid inlet pipe passes through the desulfurization tank, and a spiral diversion channel arranged in the desulfurization tank is fixedly installed on the liquid inlet pipe. A plurality of baffle plates are fixedly connected to the spiral diversion channel, and a spray head group vertically penetrating the spiral diversion channel is installed on the spiral diversion channel. The spray head group is connected to the conveying assembly and the disturbance assembly. The disturbance assembly penetrates through the liquid inlet pipe, and a temperature guiding piece is arranged on the disturbance assembly. The desulfurizer is conveyed through the conveying assembly and sprayed out through the spray head group to fully contact the low-pressure gas in cooperation with the spiral diversion channel; The pressurization mechanism includes a control assembly, the control assembly is connected to the desulfurization tank and a plurality of hydraulic assemblies. One end of the hydraulic assembly is connected with a sealing plug, the sealing plug is hermetically arranged on the spiral diversion channel, and an exhaust assembly is arranged on the sealing plug. The sealing plug is also connected with an air outlet assembly through a connecting assembly. A plurality of air outlet assemblies are arranged on the spray head group. The movement of the sealing plug is realized through the cooperation of the control assembly and the hydraulic assembly, so as to achieve the pressurization effect of low molecules; after pressurization, the exhaust assembly and the baffle plate block automatic exhaust to reduce pressure, so that pressurization and pressure reduction are switched.

[0008] Preferably, air outlet heads and air inlets are installed on both the upper and lower sides of the desulfurization tank.

[0009] Preferably, both sides of the spray head group are also connected to the inner wall of the liquid inlet pipe and the desulfurization tank to form a closed space, and both sides of the sealing plug are also hermetically connected to the liquid inlet pipe and the desulfurization tank to form a closed space.

[0010] Preferably, the conveying assembly further includes a conveying pump, the conveying pump is fixedly installed on the desulfurization tank, the conveying pump is communicated with the liquid inlet pipe and the sulfur outlet pipe, the sulfur outlet pipe passes through the liquid inlet pipe and penetrates into the desulfurization tank to be communicated with the spray head group, and a plurality of liquid inlet heads are installed below the liquid inlet pipe.

[0011] Preferably, the perturbation component includes a shunt pipe and a turbulence channel. A plurality of heat conduction fins are fixedly installed on the shunt pipe, and the heat conduction fins are arranged in the liquid inlet pipe. The shape of the heat conduction fin is wavy.

[0012] Preferably, the shunt pipe is communicated with the sulfur outlet pipe. The turbulence channel is rotatably installed on the shunt pipe through a bearing, and the turbulence channel is communicated with the shunt pipe. A plurality of liquid outlet heads arranged tangentially are installed on the turbulence channel.

[0013] Preferably, the control component includes an electric push rod. The electric push rod is fixedly installed on the desulfurization tank, and one end of the electric push rod is fixedly connected with a connecting rod.

[0014] Preferably, the hydraulic component includes a cylinder. A first piston is arranged inside the cylinder. One side of the first piston is fixedly connected with a piston rod. The piston rod passes through the cylinder and is fixedly connected with the connecting rod. One side of the cylinder is communicated with a pipeline. The pipeline penetrates into the desulfurization tank and is communicated with an arc-shaped cylinder. The arc-shaped cylinder is fixedly installed on the spiral diversion channel through two fixing members. A second piston is arranged inside the arc-shaped cylinder. One side of the second piston is fixedly connected with an arc-shaped rod. The arc-shaped rod passes through the arc-shaped cylinder and is fixedly connected with a sealing plug.

[0015] Preferably, the exhaust component includes a valve seat. The valve seat is installed on the sealing plug. A plurality of air outlet openings are formed in the valve seat. A valve rod passes through the valve seat. One end of the valve rod is fixedly connected with a sealing body. The sealing body fits the valve seat, and a first spring is fixedly connected between the other end of the valve rod and the valve seat.

[0016] Preferably, the connection component includes an arc-shaped connecting rod. The arc-shaped connecting rod transversely slides on the spiral diversion channel. One end of the arc-shaped connecting rod is fixedly connected with a rope. The rope is fixedly connected with the sealing plug; The air outlet component includes an air seat. The air seat is installed on the spray head group. A plurality of exhaust openings are formed in the air seat. A movable rod passes through the air seat. A second spring is fixedly connected between one end of the movable rod and the air seat. The other end of the movable rod is fixedly connected with a sealing ball. The sealing ball fits on the air seat, and the sealing ball is fixedly connected with the arc-shaped connecting rod.

[0017] Compared with the prior art, the present invention provides a device for recycling low-pressure gas hydrogen in the process of diesel hydrogenation preparation, and has the following beneficial effects: 1. The device for recycling low - pressure gas hydrogen in the diesel hydrogenation preparation process drives the hydraulic component through the control component for hydraulic transmission, enabling the sealing plug to be movable. The movement of the sealing plug can pressurize the closed space formed by the spiral diversion channel and the spray head group. After pressurization for a period, the exhaust component contacts the baffle and automatically opens for exhaust, and the connection component drives the exhaust component to open to achieve the flow of low - pressure gas. In this way, through the cooperation of the control component and the hydraulic component, the sealing plug reciprocally switches between pressurization and depressurization operations. During pressurization, gas - liquid mass transfer accelerates, and more low - pressure gas enters the liquid phase to react with the desulfurizer; during depressurization, a part of the gas dissolved in the liquid phase will escape, breaking the original gas - liquid equilibrium, prompting more low - pressure gas to enter the liquid phase from the gas phase, further improving the mass transfer efficiency and strengthening the desulfurization reaction.

[0018] 2. The device for recycling low - pressure gas hydrogen in the diesel hydrogenation preparation process feeds liquid through the feed liquid head by a transfer pump and discharges it through the sulfur discharge pipe and the shunt pipe. The spray head group sprays the desulfurizer to carry out desulfurization reaction with low - molecules. And part of the desulfurizer also discharges through the turbulence channel and the liquid discharge head. Since the liquid discharge head is tangentially designed on the turbulence channel, the turbulence channel can be rotated, enabling the recycled desulfurizer to not only rotate and dissolve in itself, but also the turbulence channel rotates for stirring to ensure the quality of the desulfurizer. And the desulfurizer flows back through the shunt pipe and can also be temperature - guided through the temperature - guiding piece, enabling the low - molecules to conduct heat exchange through the temperature - guiding piece to achieve the purpose of cooling the low - molecules. Moreover, a cooling device is added at the bottom of the desulfurization tank. In this way, after stirring, the low - temperature effect can be ensured, thus guaranteeing the subsequent operation of uniformly and rapidly conducting heat exchange on the low - molecules, and stabilizing the performance of the desulfurizer. An appropriate temperature helps to maintain the activity of the desulfurizer.

[0019] 3. The device for recycling low - pressure gas hydrogen in the diesel hydrogenation preparation process can ensure the spiral upward flow of low - molecules through the spiral diversion channel, enabling the conveying component to cooperate with the spray head group to spray the desulfurizer at multiple places, ensuring the desulfurization effect and improving the heat exchange efficiency. Secondly, when the control component drives the hydraulic component to move, the hydraulic pressure drives the sealing plug to move. After the sealing plug moves a certain distance for pressurization, the air outlet component contacts the baffle and can open for air outlet and depressurization. In this way, through hydraulic control, the reciprocating switching between pressurization and depressurization is carried out. In this way, during the pressurization of the cooled low - pressure gas, the gas density increases more significantly, the gas - liquid mass transfer driving force increases, which can further improve the absorption effect and desulfurization efficiency. And during the pressurization and depressurization process, the pressure and volume of the gas are constantly changing, which will prompt more sufficient heat exchange of the low - pressure gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three - dimensional view of a device for recycling low - pressure gas hydrogen in the diesel hydrogenation preparation process proposed by the present invention; Figure 2Stereoscopic view of the connection between the desulfurization tank and the conveying component of a low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention; Figure 3 Stereoscopic view of the connection between the desulfurization tank and the spiral diversion channel profile of a low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention; Figure 4 Stereoscopic view of the cross-section of the desulfurization tank of a low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention; Figure 5 Stereoscopic view of the connection between the liquid inlet pipe and the spiral diversion channel of a low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention; Figure 6 Stereoscopic view of the connection between the spiral diversion channel and the sealing plug of a low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention; Figure 7 Stereoscopic view of the cross-section of the liquid inlet pipe of a low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention; Figure 8 In the present invention Figure 7 Enlarged view of part A; Figure 9 Stereoscopic view of the cross-section of the hydraulic component of a low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention; Figure 10 In the present invention Figure 9 Enlarged view of part B.

[0021] In the figure: 100, desulfurization mechanism; 101, desulfurization tank; 102, air inlet; 103, conveying assembly; 1031, conveying pump; 1032, liquid inlet pipe; 1033, sulfur outlet pipe; 1034, liquid inlet head; 104, gas outlet head; 105, spiral diversion channel; 106, disturbance assembly; 1061, turbulence channel; 1062, liquid outlet head; 1063, shunt pipe; 107, spray head group; 108, temperature guiding piece; 109, baffle; 200, pressurization mechanism; 201, control assembly; 2011, electric push rod; 2012, connecting rod; 202, hydraulic assembly; 2021, fixing piece; 2022, piston rod; 2023, first piston; 2024, cylinder; 2025, pipeline; 2026, arc-shaped cylinder; 2027, second piston; 2028, arc-shaped rod; 203, connecting assembly; 2031, arc-shaped connecting rod; 2032, rope; 204, sealing plug; 205, exhaust assembly; 2051, valve seat; 2052, gas outlet; 2053, first spring; 2054, sealing body; 2055, valve rod; 206, gas outlet assembly; 2061, gas seat; 2062, exhaust port; 2063, sealing ball; 2064, second spring; 2065, movable rod. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] Embodiment 1: Refer to Figures 1-7 and Figures 9-10 , a low-pressure gas hydrogen recovery and utilization device in the process of diesel hydrogenation preparation, including a desulfurization mechanism 100, and a pressurization mechanism 200 is arranged on the desulfurization mechanism 100; The desulfurization mechanism 100 includes a desulfurization tank 101. Gas outlet heads 104 and gas inlets 102 are installed on both the upper and lower sides of the desulfurization tank 101. Low-pressure gas can be introduced into the desulfurization tank 101 through the gas inlets 102, and the desulfurized low-pressure gas can be discharged from above the desulfurization tank 101 through the gas outlet heads 104. A conveying assembly 103 is provided on the desulfurization tank 101. The conveying assembly 103 includes a liquid inlet pipe 1032 which penetrates through the desulfurization tank 101, and a spiral diversion channel 105 arranged in the desulfurization tank 101 is fixedly installed on the liquid inlet pipe 1032. Through the spiral diversion channel 105, it can ensure that the low-pressure gas flows spirally from bottom to top, thereby increasing the residence time of the low-pressure gas, enabling the low-pressure gas to fully react with the desulfurizing agent, and achieving a multi-stage pressurization effect to improve the desulfurization effect of the low-pressure gas. A plurality of baffles 109 are fixedly connected to the spiral diversion channel 105, and a spray head group 107 vertically penetrating the spiral diversion channel 105 is installed on the spiral diversion channel 105. The spray head group 107 can spray the desulfurizing agent in a split manner on the spiral diversion channel 105, thereby enabling the desulfurizing agent to be sprayed in multiple places and improving the full reaction efficiency of the desulfurizing agent and the low-pressure gas. Moreover, the spray head group 107 can form a sealed space to ensure the smooth progress of the pressurization operation. Both sides of the spray head group 107 are also connected to the liquid inlet pipe 1032 and the inner wall of the desulfurization tank 101 to form a sealed space in this way. The spray head group 107 is connected to the conveying assembly 103 and the disturbance assembly 106. The disturbance assembly 106 penetrates through the liquid inlet pipe 1032, and a temperature guiding piece 108 is provided on the disturbance assembly 106. The desulfurizing agent is conveyed through the conveying assembly 103 and sprayed out through the spray head group 107 to fully contact the low-pressure gas in cooperation with the spiral diversion channel 105; The pressurizing mechanism 200 includes a control component 201. The control component 201 includes an electric push rod 2011 which is fixedly installed on the desulfurization tank 101. One end of the electric push rod 2011 is fixedly connected to a connecting rod 2012. The control component 201 is connected to the desulfurization tank 101 and a plurality of hydraulic components 202. The hydraulic component 202 includes a cylinder 2024. A first piston 2023 is arranged inside the cylinder 2024. One side of the first piston 2023 is fixedly connected to a piston rod 2022. The piston rod 2022 passes through the cylinder 2024 and is fixedly connected to the connecting rod 2012. One side of the cylinder 2024 is communicated with a pipeline 2025. The pipeline 2025 can be connected to the cylinder 2024 and the arc-shaped cylinder 2026, so that the liquid can flow between the cylinder 2024 and the arc-shaped cylinder 2026. The pipeline 2025 penetrates into the desulfurization tank 101 and is communicated with the arc-shaped cylinder 2026. The arc-shaped cylinder 2026 is fixedly installed on the spiral diversion channel 105 through two fixing members 2021. A second piston 2027 is arranged inside the arc-shaped cylinder 2026. One side of the second piston 2027 is fixedly connected to an arc-shaped rod 2028. Through the arc-shaped design of the arc-shaped rod 2028 and the arc-shaped cylinder 2026, the sealing plug 204 can be controlled to move in an arc, ensuring the smooth movement of the sealing plug 204. The arc-shaped rod 2028 passes through the arc-shaped cylinder 2026 and is fixedly connected to the sealing plug 204. One end of the hydraulic component 202 is connected to the sealing plug 204. Both sides of the sealing plug 204 are also hermetically connected to the liquid inlet pipe 1032 and the desulfurization tank 101 to form a closed space. The sealing plug 204 fits the spiral diversion channel 105, the inner wall of the desulfurization tank 101 and the liquid inlet pipe 1032, so as to maintain the sealing performance and ensure the smooth progress of the pressurizing operation. The sealing plug 204 is hermetically arranged on the spiral diversion channel 105, and an exhaust component 205 is arranged on the sealing plug 204. The exhaust component 205 includes a valve seat 2051 which is installed on the sealing plug 204. A plurality of air outlets 2052 are opened on the valve seat 2051. A valve rod 2055 passes through the valve seat 2051. One end of the valve rod 2055 is fixedly connected to a sealing body 2054. By the valve rod 2055 contacting the baffle 109, the valve rod 2055 pushes open the sealing body 2054, so that the air outlets 2052 can smoothly discharge air for pressure reduction operation. The sealing body 2054 fits the valve seat 2051, and a first spring 2053 is fixedly connected between the other end of the valve rod 2055 and the valve seat 2051. The first spring 2053 can drive the valve rod 2055 to reset, so that the sealing ball 2063 fits the valve seat 2051, thus ensuring the sealing performance of the air outlets 2052 and ensuring the pressurizing operation of the sealing plug 204. The sealing plug 204 is also connected to an air outlet component 206 through a connection component 203. The connection component 203 includes an arc-shaped connecting rod 2031 which transversely slides on the spiral diversion channel 105. The arc-shaped connecting rod 2031 is arc-shaped and can smoothly slide on the spiral diversion channel 105, so that the arc-shaped connecting rod 2031 can smoothly follow the arc movement of the sealing plug 204.It can drive the separation of the sealing ball 2063 from the gas seat 2061, thereby realizing the ventilation operation of low-pressure gas. One end of the arc-shaped connecting rod 2031 is fixedly connected with a rope 2032. By reserving a section of the rope 2032, the sealing plug 204 can move a certain distance smoothly, avoiding the problem that the acting force directly acts on the arc-shaped connecting rod 2031 and causing the sealing ball 2063 to open. The rope 2032 is fixedly connected with the sealing plug 204. A plurality of air outlet components 206 are arranged on the spray head group 107. The air outlet component 206 includes a gas seat 2061. The gas seat 2061 is installed on the spray head group 107. A plurality of exhaust ports 2062 are opened on the gas seat 2061. Through the exhaust ports 2062, the upward smooth flow of low-pressure gas can be ensured. And a movable rod 2065 penetrates through the gas seat 2061. A second spring 2064 is fixedly connected between one end of the movable rod 2065 and the gas seat 2061. The second spring 2064 drives the movable rod 2065 to reset, so that the sealing ball 2063 fits against the gas seat 2061, thereby ensuring the sealing performance of the exhaust port 2062. The other end of the movable rod 2065 is fixedly connected with a sealing ball 2063. The sealing ball 2063 fits against the gas seat 2061, and the sealing ball 2063 is fixedly connected with the arc-shaped connecting rod 2031. The movement of the sealing plug 204 is realized by the cooperation of the control component 201 and the hydraulic component 202, so as to realize the pressurization effect of low molecules; after pressurization, the exhaust component 205 and the baffle 109 block automatic exhaust and carry out pressure reduction, so that the pressurization and pressure reduction are switched.

[0025] In this embodiment: The electric push rod 2011 drives the connecting rod 2012 and the piston rod 2022 to move. The piston rod 2022 drives the first piston 2023 to move, so that the liquid enters the arc-shaped cylinder 2026. Then, the second piston 2027 and the arc-shaped rod 2028 are driven to move by hydraulic pressure, so that the arc-shaped rod 2028 drives the sealing plug 204 to move, and the movement of the sealing plug 204 can pressurize the closed space formed by the spiral diversion channel 105 and the spray head group 107. After pressurization for a period of time, the valve rod 2055 contacts the baffle 109, the sealing body 2054 is pushed open, and exhaust and pressure reduction are carried out through the air outlet 2052. And the arc-shaped connecting rod 2031 is pulled to move through the rope 2032, and the arc-shaped connecting rod 2031 drives the sealing ball 2063 to open the exhaust port 2062 to realize the flow of low-pressure gas. In this way, the control component 201 and the hydraulic component 202 are used to drive the sealing plug 204 to reciprocally switch between pressurization and pressure reduction operations. During pressurization, the gas-liquid mass transfer is accelerated, and more low-pressure gas enters the liquid phase to react with the desulfurizer; during pressure reduction, a part of the gas dissolved in the liquid phase will escape, breaking the original gas-liquid balance, prompting more low-pressure gas to enter the liquid phase from the gas phase, further improving the mass transfer efficiency and strengthening the desulfurization reaction.

[0026] Example 2: Refer to Figures 6-8, A device for recycling low-pressure gas hydrogen in the process of diesel hydrogenation preparation, including a conveying component 103. The conveying component 103 further includes a conveying pump 1031. The conveying pump 1031 can extract desulfurizer through the liquid inlet head 1034, so as to convey the desulfurizer upward, enabling the desulfurizer to be shunted and discharged through the desulfurization tank 101 and the shunt pipe 1063. The conveying pump 1031 is fixedly installed on the desulfurization tank 101. The conveying pump 1031 is connected to the liquid inlet pipe 1032 and the sulfur outlet pipe 1033. The sulfur outlet pipe 1033 passes through the liquid inlet pipe 1032 and penetrates into the desulfurization tank 101 to be connected to the spray head group 107. Through the sulfur outlet pipe 1033, the desulfurizer can be guided into the spray head group 107 for spraying operation. A plurality of liquid inlet heads 1034 are installed below the liquid inlet pipe 1032; The disturbance component 106 includes a shunt pipe 1063 and a turbulence channel 1061. A plurality of temperature guiding fins 108 are fixedly installed on the shunt pipe 1063, and the temperature guiding fins 108 are arranged in the liquid inlet pipe 1032. The shape of the temperature guiding fins 108 is wavy. The temperature guiding fins 108 can play a role in guiding temperature, so as to perform heat exchange operation on the low-pressure gas. Moreover, the temperature guiding fins 108 are wavy, increasing the heat exchange area and improving the heat exchange efficiency. The shunt pipe 1063 is connected to the sulfur outlet pipe 1033. The turbulence channel 1061 is rotatably installed on the shunt pipe 1063 through a bearing, and the turbulence channel 1061 is connected to the shunt pipe 1063. A plurality of liquid outlet heads 1062 arranged tangentially are installed on the turbulence channel 1061. By arranging the liquid outlet heads 1062 tangentially on the turbulence channel 1061, the desulfurizer is ejected, and the turbulence channel 1061 can be driven to rotate by means of the ejection force, so as to disturb the flow of the desulfurizer and ensure the quality of the desulfurizer; In this embodiment: The liquid is fed through the liquid inlet head 1034 by the conveying pump 1031 and discharged through the sulfur outlet pipe 1033 and the shunt pipe 1063, enabling the desulfurizer ejected by the spray head group 107 to carry out desulfurization reaction with the low molecules. And part of the desulfurizer is also discharged through the turbulence channel 1061 and the liquid outlet heads 1062. Since the liquid outlet heads 1062 are tangentially designed on the turbulence channel 1061, the turbulence channel 1061 can be rotated, enabling the refluxed desulfurizer to not only rotate and dissolve in itself, but also the turbulence channel 1061 rotates for stirring to ensure the quality of the desulfurizer. And the desulfurizer refluxes through the shunt pipe 1063 and can also be temperature-guided through the temperature guiding fins 108, enabling the low molecules to perform heat exchange through the temperature guiding fins 108 to achieve the purpose of cooling the low molecules. Moreover, a cooling device is added at the bottom of the desulfurization tank 101. After stirring, the low-temperature effect can be ensured, so as to ensure the subsequent operation of uniformly and quickly performing heat exchange on the low molecules, thereby stabilizing the performance of the desulfurizer. An appropriate temperature helps to maintain the activity of the desulfurizer.

[0027] Example 3: Refer to Figure 3 and Figures 5-7, A device for recycling low-pressure gas hydrogen in the process of diesel hydrogenation preparation, including a desulfurization mechanism 100. The desulfurization mechanism 100 includes a desulfurization tank 101. A conveying component 103 is arranged on the desulfurization tank 101. The conveying component 103 includes a liquid inlet pipe 1032. The liquid inlet pipe 1032 penetrates through the desulfurization tank 101, and a spiral diversion channel 105 arranged in the desulfurization tank 101 is fixedly installed on the liquid inlet pipe 1032. A plurality of baffles 109 are fixedly connected to the spiral diversion channel 105, and a spray head group 107 vertically penetrating the spiral diversion channel 105 is installed on the spiral diversion channel 105. The spray head group 107 is connected to the conveying component 103 and the disturbance component 106. The disturbance component 106 penetrates through the liquid inlet pipe 1032, and a temperature guiding sheet 108 is arranged on the disturbance component 106. The desulfurization agent is conveyed through the conveying component 103 and sprayed out through the spray head group 107 to fully contact the low-pressure gas in cooperation with the spiral diversion channel 105; The pressurization mechanism 200 includes a control component 201. The control component 201 is connected to the desulfurization tank 101 and a plurality of hydraulic components 202. One end of the hydraulic component 202 is connected with a sealing plug 204. The sealing plug 204 is hermetically arranged on the spiral diversion channel 105, and an exhaust component 205 is arranged on the sealing plug 204. The sealing plug 204 is also connected to an air outlet component 206 through a connecting component 203. A plurality of air outlet components 206 are arranged on the spray head group 107. The movement of the sealing plug 204 is realized by the cooperation of the control component 201 and the hydraulic component 202, so as to achieve the pressurization effect of low molecules; after pressurization, the exhaust component 205 and the baffle 109 block automatic exhaust to carry out pressure reduction, so that pressurization and pressure reduction are switched.

[0028] In this embodiment: The spiral diversion channel 105 can ensure that low molecules flow upward in a spiral manner, so that the conveying component 103 can cooperate with the spray head group 107 to spray the desulfurization agent at multiple places, ensuring the desulfurization effect and improving the heat exchange efficiency. Secondly, the control component 201 drives the hydraulic component 202 to move, then the hydraulic pressure drives the sealing plug 204 to move. After the sealing plug 204 moves a certain distance for pressurization, the air outlet component 206 contacts the baffle 109 to open the air outlet for pressure reduction. In this way, the pressurization and pressure reduction are reciprocally switched through hydraulic control. In this way, during the pressurization process of the cooled low-pressure gas, the gas density increases more significantly, the gas-liquid mass transfer driving force increases, the absorption effect can be further improved, and the desulfurization efficiency can be improved. Moreover, during the pressurization and pressure reduction process, the pressure and volume of the gas change continuously, which will promote more sufficient heat exchange of the low-pressure gas.

[0029] Working principle: When performing low-pressure gas desulfurization operation, low-pressure gas is introduced through the air inlet 102, and the low-pressure gas flows upward in a spiral along the spiral diversion channel 105. During the flowing process, the transfer pump 1031 extracts the desulfurization agent through the liquid inlet head 1034, and the desulfurization agent is transported to the spray head group 107 through the sulfur outlet pipe 1033, so that the spray head group 107 sprays out the desulfurization agent to react with the low-pressure gas. And a part of the desulfurization agent also flows back downward through the shunt pipe 1063. Then, heat exchange operation of low molecules can be realized through the heat conduction sheet 108, and the flowing-back desulfurization agent is sprayed out through the liquid outlet head 1062, so that the liquid outlet head 1062 drives the turbulence channel 1061 to rotate to turbulize the desulfurization agent. When performing desulfurization, the electric push rod 2011 drives the connecting rod 2012 to move, the connecting rod 2012 drives the piston rod 2022 to move, the piston rod 2022 drives the first piston 2023 to move, so that the liquid enters the arc-shaped cylinder 2026 through the pipeline 2025. Then, the second piston 2027 is driven to move through hydraulic pressure, the second piston 2027 drives the arc-shaped rod 2028 to move, the arc-shaped rod 2028 drives the sealing plug 204 to move, so that the sealing plug 204 pressurizes the low molecules. After the sealing plug 204 moves for a certain distance, the valve rod 2055 contacts the baffle 109, and the valve rod 2055 drives the sealing body 2054 to separate from the valve seat 2051. At this time, air outlet and pressure reduction are carried out through the air outlet 2052, and the sealing body 2054 is opened. The rope 2032 is straightened and directly drives the arc-shaped connecting rod 2031 and the sealing ball 2063 to move, so that the sealing ball 2063 separates from the air seat 2061. At this time, the ventilation operation of low molecules can be maintained through the exhaust port 2062. Then, the electric push rod 2011 retracts, and the hydraulic component 202 controls the sealing plug 204 to reset. Then, the sealing plug 204 is reciprocally operated, and thus the switching operation of pressurization and pressure reduction can be carried out to accelerate the desulfurization effect of low molecules. After desulfurization, it is output through the air outlet 2052.

[0030] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A low-pressure gas hydrogen recovery and utilization device in the process of diesel hydrogenation preparation, including a desulfurization mechanism (100), characterized in that, A pressurizing mechanism (200) is provided on the desulfurization mechanism (100); The desulfurization mechanism (100) includes a desulfurization tank (101). A conveying assembly (103) is provided on the desulfurization tank (101). The conveying assembly (103) includes a liquid inlet pipe (1032). The liquid inlet pipe (1032) penetrates through the desulfurization tank (101), and a spiral diversion channel (105) arranged in the desulfurization tank (101) is fixedly installed on the liquid inlet pipe (1032). A plurality of baffles (109) are fixedly connected to the spiral diversion channel (105), and a spray head group (107) longitudinally penetrating the spiral diversion channel (105) is installed on the spiral diversion channel (105). The spray head group (107) is connected to the conveying assembly (103) and the disturbance assembly (106). The disturbance assembly (106) penetrates through the liquid inlet pipe (1032), and a temperature guiding sheet (108) is provided on the disturbance assembly (106). The desulfurizing agent is conveyed through the conveying assembly (103) and sprayed out through the spray head group (107) to fully contact the low-temperature gas in cooperation with the spiral diversion channel (105); The pressurizing mechanism (200) includes a control assembly (201). The control assembly (201) is connected to the desulfurization tank (101) and a plurality of hydraulic assemblies (202). One end of the hydraulic assembly (202) is connected to a sealing plug (204). The sealing plug (204) is hermetically arranged on the spiral diversion channel (105), and an exhaust assembly (205) is provided on the sealing plug (204). The sealing plug (204) is also connected to an air outlet assembly (206) through a connecting assembly (203). A plurality of air outlet assemblies (206) are arranged on the spray head group (107). The movement of the sealing plug (204) is realized by the control assembly (201) cooperating with the hydraulic assembly (202), thereby realizing the pressurizing effect of low molecules; after pressurization, the automatic exhaust is blocked between the exhaust assembly (205) and the baffle (109) to carry out pressure reduction, so that pressurization and pressure reduction are switched.

2. The low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 1, characterized in that, Gas outlet heads (104) and air inlets (102) are installed on both the upper and lower sides of the desulfurization tank (101).

3. The low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 1, characterized in that, Both sides of the spray head group (107) are also connected to the inner wall of the liquid inlet pipe (1032) and the desulfurization tank (101) to form a closed space, and both sides of the sealing plug (204) are also hermetically connected to the liquid inlet pipe (1032) and the desulfurization tank (101) to form a closed space.

4. A low-pressure gas hydrogen recovery and utilization device in the process of diesel hydrogenation preparation according to claim 1, characterized in that, The conveying assembly (103) further includes a conveying pump (1031). The conveying pump (1031) is fixedly installed on the desulfurization tank (101). The conveying pump (1031) is communicated with the liquid inlet pipe (1032) and a sulfur outlet pipe (1033). The sulfur outlet pipe (1033) passes through the liquid inlet pipe (1032) and penetrates into the desulfurization tank (101) to be communicated with the spray head group (107). A plurality of liquid inlet heads (1034) are installed below the liquid inlet pipe (1032).

5. A low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 4, characterized in that, The perturbation component (106) includes a shunt pipe (1063) and a turbulence channel (1061). A plurality of temperature guiding fins (108) are fixedly installed on the shunt pipe (1063), and the temperature guiding fins (108) are arranged in the liquid inlet pipe (1032). The shape of the temperature guiding fins (108) is wavy.

6. The low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 5, characterized in that, The shunt pipe (1063) is communicated with the sulfur outlet pipe (1033). The turbulence channel (1061) is rotatably installed on the shunt pipe (1063) through a bearing, and the turbulence channel (1061) is communicated with the shunt pipe (1063). A plurality of liquid outlet heads (1062) arranged tangentially are installed on the turbulence channel (1061).

7. A low-pressure gas hydrogen recovery and utilization device in the process of diesel hydrogenation preparation according to claim 1, characterized in that, The control component (201) includes an electric push rod (2011). The electric push rod (2011) is fixedly installed on the desulfurization tank (101), and one end of the electric push rod (2011) is fixedly connected with a connecting rod (2012).

8. The low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 7, characterized in that, The hydraulic component (202) includes a cylinder (2024). A first piston (2023) is arranged inside the cylinder (2024). One side of the first piston (2023) is fixedly connected with a piston rod (2022). The piston rod (2022) passes through the cylinder (2024) and is fixedly connected with the connecting rod (2012). One side of the cylinder (2024) is communicated with a pipe (2025). The pipe (2025) penetrates into the desulfurization tank (101) and is communicated with an arc-shaped cylinder (2026). The arc-shaped cylinder (2026) is fixedly installed on the spiral diversion channel (105) through two fixing parts (2021). A second piston (2027) is arranged inside the arc-shaped cylinder (2026). One side of the second piston (2027) is fixedly connected with an arc-shaped rod (2028). The arc-shaped rod (2028) passes through the arc-shaped cylinder (2026) and is fixedly connected with a sealing plug (204).

9. A low-pressure gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 1, characterized in that, The exhaust component (205) includes a valve seat (2051). The valve seat (2051) is installed on the sealing plug (204). A plurality of air outlet holes (2052) are formed in the valve seat (2051). A valve rod (2055) penetrates through the valve seat (2051). One end of the valve rod (2055) is fixedly connected with a sealing body (2054). The sealing body (2054) fits the valve seat (2051), and a first spring (2053) is fixedly connected between the other end of the valve rod (2055) and the valve seat (2051).

10. A low-pressure gas hydrogen recovery and utilization device in the process of diesel hydrogenation preparation according to claim 1, characterized in that, The connection component (203) includes an arc-shaped connecting rod (2031). The arc-shaped connecting rod (2031) transversely slides on the spiral diversion channel (105). One end of the arc-shaped connecting rod (2031) is fixedly connected with a rope (2032). The rope (2032) is fixedly connected with the sealing plug (204). The air outlet assembly (206) includes an air seat (2061), the air seat (2061) is installed on the nozzle group (107), a plurality of exhaust ports (2062) are formed in the air seat (2061), and a movable rod (2065) is inserted through the air seat (2061). A second spring (2064) is fixedly connected between one end of the movable rod (2065) and the air seat (2061). The other end of the movable rod (2065) is fixedly connected to a sealing ball (2063). The sealing ball (2063) fits on the air seat (2061), and the sealing ball (2063) is fixedly connected to the arc-shaped connecting rod (2031).

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