A device for recovering and utilizing low-fraction hydrogen in the process of diesel hydrogenation preparation

Abstract

The present invention discloses a low-fraction gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process, which belongs to the technical field of low-fraction gas recovery and proposes the following scheme, which includes a desulfurization mechanism, wherein a boosting mechanism is provided on the desulfurization mechanism; the present invention drives a hydraulic component to perform hydraulic transmission through a control component, so that a sealing plug is movable, and the sealing plug is movable to perform a boosting operation on a closed space formed by a spiral guide channel and a nozzle group, and after a period of boosting, the exhaust component contacts a baffle to automatically open for exhaust, and the connecting component drives the exhaust component to open to realize the flow of low-fraction gas, thereby driving the sealing plug to switch back and forth between boosting and depressurization by the control component in cooperation with the hydraulic component. During boosting, gas-liquid mass transfer is accelerated, and more low-fraction 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-fraction gas to enter the liquid phase from the gas phase, further improving the mass transfer efficiency, and strengthening the desulfurization reaction.

Description

Technical Field

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

[0002] Diesel is a product obtained by atmospheric distillation of petroleum. To improve the performance of diesel, hydrogenation is generally introduced during the diesel processing process to reduce the content of sulfur, nitrogen, oxygen, and olefins in diesel, thereby improving the stability of the product.

[0003] During the production process of diesel hydrotreaters, some low-fraction gas is generated. Currently, this low-fraction gas is transported through the fuel gas pipeline network and fed into the heating furnace for combustion. Unfortunately, the hydrogen in the low-fraction gas is not effectively utilized. Furthermore, hydrogen has a relatively low volumetric calorific value, and when burned, the flame drifts and disperses, easily causing flames to burst into the furnace tubes and excessively high temperatures in the upper furnace, impacting safe production.

[0004] Chinese patent application number CN201721908972.6 discloses a low-fraction gas desulfurization system. Although it can improve the desulfurization effect of low-fraction gas to a certain extent, in the process of desulfurization using absorbent, the low-fraction gas is conventionally introduced from the middle of the desulfurization tower, flows from bottom to top in the tower, and contacts and reacts with the desulfurizer sprayed from top to bottom in the opposite direction. Current processes mostly rely on single-layer or double-layer spray structures to implement desulfurization treatment, and the desulfurizer is directly injected into the desulfurization reactor along the feed pipe via a delivery pump. However, this simple delivery and spraying method makes it difficult for the desulfurizer to be evenly dispersed in the reactor and cannot be fully mixed with the low-fraction gas. As a result, the contact area and contact time between the low-fraction gas and the desulfurizer are limited, which not only leads to low desulfurizer utilization and a large amount of waste, but also causes poor desulfurization effect and significantly reduced efficiency. In addition, due to the high temperature of the low-fraction gas itself, it will have a negative impact on the solubility and absorption capacity of the absorbent. Under high temperature conditions, the absorbent's ability to absorb sulfur dioxide is weakened, further exacerbating the problem of insufficient desulfurization efficiency and making it difficult to meet the increasingly stringent desulfurization process requirements.

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

[0006] The purpose of the present invention is to solve the problem that in the process of desulfurization using an absorbent, the desulfurizer is difficult to be evenly dispersed in the reactor and fully mixed with the low-fraction gas, resulting in insufficient contact between the low-fraction gas and the desulfurizer, causing waste of the desulfurizer, low utilization rate, poor desulfurization effect, and reduced desulfurization efficiency. In addition, the low-fraction gas temperature is high, which affects the solubility and absorption capacity of the absorbent and reduces the absorbent's absorption efficiency of sulfur dioxide. A low-fraction gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process is proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A low-gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process comprises a desulfurization mechanism, wherein a pressurization mechanism is provided on the desulfurization mechanism;

[0009] The desulfurization mechanism includes a desulfurization tank, and the desulfurization tank is provided with a conveying assembly. The conveying assembly includes a liquid inlet pipe, the liquid inlet pipe passes through the desulfurization tank, and a spiral guide channel arranged in the desulfurization tank is fixedly installed on the liquid inlet pipe. A plurality of baffles are fixedly connected to the spiral guide channel, and a nozzle group that vertically passes through the spiral guide channel is installed on the spiral guide channel. The nozzle group is connected to the conveying assembly and the disturbance assembly. The disturbance assembly passes through the liquid inlet pipe below, and a temperature guide plate is provided on the disturbance assembly. The desulfurizer is conveyed through the conveying assembly and sprayed out through the nozzle group to cooperate with the spiral guide channel to fully contact with the low-gas fraction.

[0010] The boosting mechanism includes a control component, which is connected to the desulfurization tank and multiple hydraulic components. One end of the hydraulic component is connected to a sealing plug, which is sealed on the spiral guide channel and is provided with an exhaust component. The sealing plug is also connected to the air outlet component through a connecting component. Multiple air outlet components are provided on the nozzle group. The movement of the sealing plug is achieved by cooperating with the hydraulic component through the control component to achieve a low-molecular boosting effect. After boosting, the exhaust component and the baffle block the automatic exhaust to reduce the pressure, so that the boosting and pressure reduction switching can be carried out.

[0011] Preferably, the desulfurization tank is provided with an air outlet and an air inlet on both the upper and lower sides.

[0012] Preferably, both sides of the nozzle group are also connected to the liquid inlet pipe and the inner wall of the desulfurization tank to form a closed space, and both sides of the sealing plug are also sealed with the liquid inlet pipe and the desulfurization tank to form a closed space.

[0013] Preferably, the delivery assembly also includes a delivery pump, which is fixedly installed on the desulfurization tank. The delivery pump is connected to 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 connected to the nozzle group. Multiple liquid inlet heads are installed below the liquid inlet pipe.

[0014] Preferably, the disturbance component includes a shunt pipe and a flow disturbance channel, a plurality of thermal conductive plates are fixedly mounted on the shunt pipe, and the thermal conductive plates are arranged in the liquid inlet pipe, and the shape of the thermal conductive plates is wavy.

[0015] Preferably, the diverter pipe is connected to the sulfur outlet pipe, the flow disruptor is rotatably mounted on the diverter pipe via a bearing, and the flow disruptor is connected to the diverter pipe, and a plurality of tangentially arranged liquid outlet heads are mounted on the flow disruptor.

[0016] Preferably, the control assembly includes an electric push rod, which is fixedly mounted on the desulfurization tank, and one end of the electric push rod is fixedly connected to a connecting rod.

[0017] Preferably, the hydraulic assembly includes a cylinder, a first piston is provided inside the cylinder, a piston rod is fixedly connected to one side of the first piston, the piston rod passes through the cylinder and is fixedly connected to the connecting rod, one side of the cylinder is connected to a pipe, the pipe passes through the desulfurization tank and is connected to the arc cylinder, the arc cylinder is fixedly installed on the spiral guide channel through two fixing parts, a second piston is provided inside the arc cylinder, a curved rod is fixedly connected to one side of the second piston, the curved rod passes through the arc cylinder and is fixedly connected to the sealing plug.

[0018] Preferably, the exhaust assembly includes a valve seat, which is installed on a sealing plug, and a plurality of air outlets are provided on the valve seat. A valve stem is passed through the valve seat, and one end of the valve stem is fixedly connected to a sealing body, which fits the valve seat, and a first spring is fixedly connected between the other end of the valve stem and the valve seat.

[0019] Preferably, the connecting assembly includes an arc-shaped connecting rod, the arc-shaped connecting rod slides across the spiral guide channel, one end of the arc-shaped connecting rod is fixedly connected to a rope, and the rope is fixedly connected to the sealing plug;

[0020] The air outlet assembly includes an air seat, which is installed on the nozzle group. A plurality of exhaust ports are provided on the air seat, and a movable rod is passed through the air seat. A second spring is fixedly connected between one end of the movable rod and the air seat, and a sealing ball is fixedly connected to the other end of the movable rod. The sealing ball is fitted on the air seat, and the sealing ball is fixedly connected to the arc connecting rod.

[0021] Compared with the prior art, the present invention provides a low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process, which has the following beneficial effects:

[0022] 1. The low-fraction gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process drives the hydraulic component to perform hydraulic transmission through the control component, so that the sealing plug can be movable. The movable sealing plug can perform pressurization operation on the enclosed space formed by the spiral guide channel and the nozzle group, and after a period of pressurization, the exhaust component contacts the baffle to automatically open the exhaust, and the connecting component drives the exhaust component to open to realize the flow of low-fraction gas. In this way, the control component cooperates with the hydraulic component to drive the sealing plug to switch between pressurization and depressurization. When pressurizing, the gas-liquid mass transfer is accelerated, and more low-fraction gas enters the liquid phase to react with the desulfurizer; when depressurizing, a part of the gas dissolved in the liquid phase will escape, breaking the original gas-liquid balance, prompting more low-fraction gas to enter the liquid phase from the gas phase, further improving the mass transfer efficiency, and strengthening the desulfurization reaction.

[0023] 2. The low-molecular-weight hydrogen recovery and utilization device in the diesel hydrogenation preparation process is fed with liquid through the liquid inlet head by a delivery pump and discharged through the sulfur outlet pipe and the diverter pipe, so that the desulfurizer sprayed out by the nozzle group reacts with the low-molecular-weight hydrogen to form a desulfurization reaction, and part of the desulfurizer is also discharged through the flow disturbance channel and the liquid outlet head. Since the tangent line of the liquid outlet head is designed on the flow disturbance channel, the flow disturbance channel can be rotated, so that the refluxed desulfurizer can not only be rotated and dissolved in itself, but also the flow disturbance channel can be rotated for stirring, thereby ensuring the quality of the desulfurizer. The desulfurizer refluxes through the diverter pipe and can also be heated by the heat conduction plate, so that the low-molecular-weight hydrogen can be heat exchanged through the heat conduction plate to achieve the purpose of cooling the low-molecular-weight hydrogen. A cooling device is added to the bottom of the desulfurization tank to ensure a low-temperature effect after stirring, thereby ensuring the subsequent uniform and rapid heat exchange of the low-molecular-weight hydrogen, thereby stabilizing the performance of the desulfurizer, and the appropriate temperature helps to maintain the activity of the desulfurizer.

[0024] 3. The low-molecular-weight gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process can ensure the spiral upward flow of low molecules through the spiral guide channel, so that the conveying component can cooperate with the nozzle group to spray the desulfurizer at multiple locations to ensure the desulfurization effect and improve the heat exchange efficiency. Secondly, the control component drives the hydraulic component to move, and the sealing plug is driven by the hydraulic pressure to move. After the sealing plug moves a certain distance for pressurization, the gas outlet component contacts the baffle to open the gas outlet for pressure reduction. In this way, the pressure increase and pressure reduction are switched back and forth through the hydraulic control. In this way, the gas density of the low-molecular-weight gas after cooling increases more significantly during the pressurization process, and the driving force of gas-liquid mass transfer increases, which can further improve the absorption effect and the desulfurization efficiency. In addition, the pressure and volume of the gas change continuously during the pressurization and pressure reduction process, which will promote more sufficient heat exchange of the low-molecular-weight gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional view of a low-gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process proposed by the present invention;

[0026] Figure 2This is a three-dimensional view of the connection between the desulfurization tank and the conveying assembly of the low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention;

[0027] Figure 3 This is a three-dimensional view of the cross-section connection between the desulfurization tank and the spiral guide channel of a low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention;

[0028] Figure 4 A perspective view of a cross section of a desulfurization tank of a low-gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process proposed by the present invention;

[0029] Figure 5 This is a three-dimensional view of the connection between the liquid inlet pipe and the spiral guide channel of the low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention;

[0030] Figure 6 This is a three-dimensional view of the connection between the spiral guide channel and the sealing plug of the low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process proposed by the present invention;

[0031] Figure 7 A perspective view of a cross section of a liquid inlet pipe of a low-gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process proposed by the present invention;

[0032] Figure 8 For the present invention Figure 7 A magnified view of point A;

[0033] Figure 9 This is a perspective view of a cross-section of a hydraulic component of a low-gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process proposed by the present invention;

[0034] Figure 10 For the present invention Figure 9 Magnified view of point B.

[0035] In the figure: 100, desulfurization mechanism; 101, desulfurization tank; 102, air inlet; 103, delivery assembly; 1031, delivery pump; 1032, liquid inlet pipe; 1033, sulfur outlet pipe; 1034, liquid inlet head; 104, air outlet head; 105, spiral flow guide; 106, disturbance assembly; 1061, flow disturbance channel; 1062, liquid outlet head; 1063, diverter pipe; 107, nozzle assembly; 108, thermal deflector; 109, baffle; 200, booster mechanism; 201, control assembly; 2011, electric push rod; 2012, connecting rod; 202, hydraulic assembly; 2021, fixing part; 2022, piston rod; 2023, first piston; 2024, cylinder; 2025, pipe; 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, air outlet; 2053, first spring; 2054, sealing body; 2055, valve stem; 206, air outlet assembly; 2061, air seat; 2062, air outlet; 2063, sealing ball; 2064, second spring; 2065, movable rod. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0038] Example 1: Reference Figure 1-Figure 7 and Figure 9-10 A low-gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process comprises a desulfurization mechanism 100, on which a pressurizing mechanism 200 is provided;

[0039] The desulfurization mechanism 100 includes a desulfurization tank 101, and an air outlet 104 and an air inlet 102 are installed on the upper and lower sides of the desulfurization tank 101. The low-fraction gas can be introduced into the desulfurization tank 101 through the air inlet 102, and the desulfurized low-fraction gas can be discharged from the top of the desulfurization tank 101 through the air outlet 104. The desulfurization tank 101 is provided with a conveying component 103, and the conveying component 103 includes a liquid inlet pipe 1032, which passes through the desulfurization tank 101, and a spiral guide channel 105 arranged in the desulfurization tank 101 is fixedly installed on the liquid inlet pipe 1032. The spiral guide channel 105 can ensure that the low-fraction gas flows in a spiral from bottom to top, thereby increasing the retention time of the low-fraction gas, allowing the low-fraction gas to fully react with the desulfurizer, and can perform multi-stage pressurization effect to improve the desulfurization effect of the low-fraction gas. It is connected with multiple baffles 109, and a nozzle group 107 that vertically passes through the spiral guide channel 105 is installed on the spiral guide channel 105. The nozzle group 107 can divert and spray the desulfurizer on the spiral guide channel 105, so that the desulfurizer can be sprayed at multiple locations, thereby improving the full reaction efficiency of the desulfurizer and the low-fraction gas. The nozzle group 107 can form a closed space to ensure the smooth progress of the pressurization operation. The two sides of the nozzle group 107 are also connected to the liquid inlet pipe 1032 and the inner wall of the desulfurization tank 101 to form a closed space. The nozzle group 107 is connected to the conveying component 103 and the disturbance component 106. The disturbance component 106 passes through the liquid inlet pipe 1032, and a thermal conductive plate 108 is provided on the disturbance component 106. The desulfurizer is conveyed through the conveying component 103 and sprayed out through the nozzle group 107 to cooperate with the spiral guide channel 105 to fully contact with the low-fraction gas.

[0040] The boosting mechanism 200 includes a control component 201, which includes an electric push rod 2011. The electric push rod 2011 is fixedly mounted 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 multiple hydraulic components 202. The hydraulic component 202 includes a cylinder 2024. A first piston 2023 is provided inside the cylinder 2024. A piston rod 2022 is fixedly connected to one side of the first piston 2023. The piston rod 2022 passes through the cylinder 2024 and is fixedly connected to the connecting rod 2012. A pipe 2025 is connected to one side of the cylinder 2024. The pipe 2025 can connect the cylinder 2024 and the arc cylinder 2026, so that the liquid can be pumped into the cylinder. 2024 and the curved cylinder 2026 flow between the pipe 2025 penetrates the desulfurization tank 101 and is connected to the curved cylinder 2026, the curved cylinder 2026 is fixedly installed on the spiral guide channel 105 through two fixing members 2021, and a second piston 2027 is provided inside the curved cylinder 2026, and a curved rod 2028 is fixedly connected to one side of the second piston 2027. Through the arc design of the curved rod 2028 and the curved cylinder 2026, the sealing plug 204 can be controlled to move in an arc shape to ensure the smooth movement of the sealing plug 204. The curved rod 2028 passes through the curved 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, and both sides of the sealing plug 204 are also connected to the liquid inlet pipe 1032 and the desulfurization tank 1 01 sealed connection to form a closed space, the sealing plug 204 fits the spiral guide 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 pressurization operation. The sealing plug 204 is sealed on the spiral guide channel 105, and the sealing plug 204 is provided with an exhaust component 205, the exhaust component 205 includes a valve seat 2051, the valve seat 2051 is installed on the sealing plug 204, a plurality of air outlets 2052 are opened on the valve seat 2051, a valve stem 2055 is passed through the valve seat 2051, one end of the valve stem 2055 is fixedly connected to the sealing body 2054, and the valve stem 2055 contacts the baffle 109, so that the valve stem 2055 pushes the sealing body 2054, so that the air outlet 2052 can be smoothly discharged. During the 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 stem 2055 and the valve seat 2051. The first spring 2053 can drive the valve stem 2055 to reset, so that the sealing ball 2063 fits the valve seat 2051, thereby ensuring the sealing of the air outlet 2052 and ensuring that the sealing plug 204 performs the pressurization operation. The sealing plug 204 is also connected to the air outlet component 206 through the connecting component 203. The connecting component 203 includes an arc-shaped connecting rod 2031, which slides across the spiral guide channel 105. The arc-shaped connecting rod 2031 is arranged in an arc shape and can slide smoothly on the spiral guide channel 105, so that the arc-shaped connecting rod 2031 can smoothly follow the arc movement of the sealing plug 204.The sealing ball 2063 can be driven to separate from the air seat 2061, thereby realizing the ventilation operation of low-gas separation. One end of the arc connecting rod 2031 is fixedly connected with a rope 2032, and a section is reserved through the rope 2032 so that the sealing plug 204 can move a distance smoothly, avoiding the problem that the force directly acts on the arc connecting rod 2031 and causes the sealing ball 2063 to open. The rope 2032 is fixedly connected to the sealing plug 204, and multiple air outlet components 206 are arranged on the nozzle group 107. The air outlet component 206 includes an air seat 2061, and the air seat 2061 is installed on the nozzle group 107. A plurality of exhaust ports 2062 are provided on the air seat 2061, and the exhaust ports 2062 can ensure that the low-gas separation can flow smoothly upward, and the air seat 2061 is provided with a movable A second spring 2064 is fixedly connected between one end of the movable rod 2065 and the air seat 2061. The second spring 2064 drives the movable rod 2065 to reset, causing the sealing ball 2063 to fit against the air seat 2061, thereby ensuring the sealing of the exhaust port 2062. The other end of the movable rod 2065 is fixedly connected to the sealing ball 2063, which fits against the air seat 2061 and is fixedly connected to the arc-shaped connecting rod 2031. The control component 201 cooperates with the hydraulic component 202 to achieve the movement of the sealing plug 204, thereby achieving a low-molecular supercharging effect. After supercharging, the exhaust component 205 and the baffle 109 block the automatic exhaust, reducing the pressure, and switching between supercharging and depressurization is performed.

[0041] In this embodiment, the electric push rod 2011 drives the connecting rod 2012 and the piston rod 2022 to move, and the piston rod 2022 drives the first piston 2023 to move, so that the liquid enters the arc cylinder 2026, and the second piston 2027 and the arc rod 2028 are driven by the hydraulic pressure to move, so that the arc rod 2028 drives the sealing plug 204 to move, so that the sealing plug 204 can be moved to increase the pressure of the closed space formed by the spiral guide channel 105 and the nozzle group 107, and after a period of increase in pressure, the valve stem 2055 contacts the baffle 109, so that the sealing body 2054 is pushed open, and the gas is discharged through the outlet 2 052 exhausts and reduces the pressure, and the arc connecting rod 2031 is pulled to move by the rope 2032, and the arc connecting rod 2031 drives the sealing ball 2063 to open the exhaust port 2062 to realize the flow of low-fraction gas. In this way, the control component 201 cooperates with the hydraulic component 202 to drive the sealing plug 204 to switch back and forth between the pressurization and reduction operations. When pressurizing, the gas-liquid mass transfer is accelerated, and more low-fraction gas enters the liquid phase to react with the desulfurizer; when reducing the pressure, a part of the gas dissolved in the liquid phase will escape, breaking the original gas-liquid balance, and prompting more low-fraction gas to enter the liquid phase from the gas phase, further improving the mass transfer efficiency, and strengthening the desulfurization reaction.

[0042] Example 2: Reference Figure 6-Figure 8A low-gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process includes a delivery component 103, which also includes a delivery pump 1031. The delivery pump 1031 can extract a desulfurizer through a liquid inlet head 1034, thereby delivering the desulfurizer upward, so that the desulfurizer is diverted and discharged through a desulfurization tank 101 and a diversion pipe 1063. The delivery pump 1031 is fixedly installed on the desulfurization tank 101, and the delivery pump 1031 is connected to a liquid inlet pipe 1032 and a sulfur outlet pipe 1033. The sulfur outlet pipe 1033 passes through the liquid inlet pipe 1032 and penetrates the desulfurization tank 101 to communicate with a nozzle group 107. The desulfurizer can be guided into the nozzle group 107 through the sulfur outlet pipe 1033 for spraying. A plurality of liquid inlet heads 1034 are installed below the liquid inlet pipe 1032.

[0043] The disturbance component 106 includes a shunt pipe 1063 and a disturbance channel 1061. A plurality of heat conducting plates 108 are fixedly mounted on the shunt pipe 1063. The heat conducting plates 108 are arranged in the liquid inlet pipe 1032. The shape of the heat conducting plates 108 is wavy. The heat conducting plates 108 can play a role in heat conduction, thereby playing a role in heat exchange of low-grade gas. The heat conducting plates 108 are wavy, which increases the heat exchange area and improves the heat exchange efficiency. The shunt pipe 1063 is connected to the sulfur outlet. The pipe 1033 is connected, and the flow disturbance channel 1061 is rotatably mounted on the diversion pipe 1063 through a bearing, and the flow disturbance channel 1061 is connected to the diversion pipe 1063. A plurality of tangentially arranged liquid outlet heads 1062 are installed on the flow disturbance channel 1061. By tangentially arranging the liquid outlet heads 1062 on the flow disturbance channel 1061, the desulfurizer is sprayed out, and the flow disturbance channel 1061 can be driven to rotate by the spray force, thereby disturbing the flow of the desulfurizer and ensuring the quality of the desulfurizer.

[0044] In this embodiment, the liquid is fed through the liquid inlet head 1034 by the delivery pump 1031 and discharged through the sulfur outlet pipe 1033 and the diversion pipe 1063, so that the desulfurizer sprayed out by the nozzle group 107 reacts with the low molecular weight desulfurizer, and part of the desulfurizer is also discharged through the disruptive flow channel 1061 and the liquid outlet head 1062. Since the liquid outlet head 1062 is tangentially designed on the disruptive flow channel 1061, the disruptive flow channel 1061 can be rotated, so that the refluxed desulfurizer can not only be rotated and dissolved in itself, but also the disruptive flow channel 1061 also rotates to stir to ensure the quality of the desulfurizer, and the desulfurizer refluxes through the diversion pipe 1063, and can also be heated by the thermal conductive plate 108, so that the low molecular weight can be heat exchanged through the thermal conductive plate 108 to achieve the purpose of cooling the low molecular weight. In addition, a cooling device is added to the bottom of the desulfurization tank 101 to ensure the low temperature effect after stirring, thereby ensuring the subsequent uniform and rapid heat exchange of the low molecular weight, thereby stabilizing the performance of the desulfurizer, and the appropriate temperature helps to maintain the activity of the desulfurizer.

[0045] Example 3: Reference Figure 3 and Figure 5-Figure 7A low-content hydrogen recovery and utilization device in the diesel hydrogenation preparation process includes a desulfurization mechanism 100, the desulfurization mechanism 100 includes a desulfurization tank 101, a conveying assembly 103 is provided on the desulfurization tank 101, and the conveying assembly 103 includes a liquid inlet pipe 1032, the liquid inlet pipe 1032 passes through the desulfurization tank 101, and a spiral guide channel 105 arranged in the desulfurization tank 101 is fixedly installed on the liquid inlet pipe 1032. A plurality of baffles 109 are connected, and a nozzle group 107 is installed on the spiral guide channel 105, which passes through the spiral guide channel 105 vertically. The nozzle group 107 is connected to the conveying component 103 and the disturbance component 106. The disturbance component 106 passes through the liquid inlet pipe 1032, and the disturbance component 106 is provided with a thermal conductive plate 108. The desulfurizer is transported through the conveying component 103 and sprayed out through the nozzle group 107 to cooperate with the spiral guide channel 105 to fully contact with the low-content gas.

[0046] The boosting mechanism 200 includes a control component 201, which is connected to the desulfurization tank 101 and multiple hydraulic components 202. One end of the hydraulic component 202 is connected to a sealing plug 204. The sealing plug 204 is sealed on the spiral guide channel 105, and an exhaust component 205 is provided on the sealing plug 204. The sealing plug 204 is also connected to the air outlet component 206 through the connecting component 203. Multiple air outlet components 206 are arranged on the nozzle group 107. The movement of the sealing plug 204 is achieved by cooperating with the hydraulic component 202 through the control component 201, so as to achieve the low-molecular boosting effect; after boosting, the exhaust component 205 and the baffle 109 are blocked to automatically exhaust and reduce the pressure, so that the boosting and pressure reduction switching can be carried out.

[0047] In this embodiment: the spiral guide channel 105 can ensure that low molecules can flow in a spiral upward direction, so that the conveying component 103 can cooperate with the nozzle group 107 to spray the desulfurizer at multiple locations to ensure the desulfurization effect and improve the heat exchange efficiency. Secondly, the control component 201 drives the hydraulic component 202 to move, and the sealing plug 204 is driven by the hydraulic pressure to move. After the sealing plug 204 moves a certain distance for pressurization, the gas outlet component 206 contacts the baffle 109 to open the gas outlet for pressure reduction. In this way, the pressure increase and pressure reduction are switched back and forth through hydraulic control. In this way, the gas density of the low-fraction gas after cooling increases more significantly during the pressurization process, and the driving force of gas-liquid mass transfer increases, which can further improve the absorption effect and the desulfurization efficiency. In addition, the pressure and volume of the gas change continuously during the pressurization and pressure reduction process, which will promote more sufficient heat exchange of the low-fraction gas.

[0048] Working principle: When performing low-molecular gas desulfurization operation, low-molecular gas is introduced through the air inlet 102, so that the low-molecular gas flows upward in a spiral along the spiral guide channel 105. During the flow process, the delivery pump 1031 extracts the desulfurizer through the liquid inlet head 1034, and the desulfurizer is delivered to the nozzle group 107 through the sulfur outlet pipe 1033, so that the nozzle group 107 sprays out the desulfurizer to react with the low-molecular gas, and part of the desulfurizer also flows back downward through the diversion pipe 1063. Then, the low-molecular heat exchange operation can be realized through the temperature conducting plate 108, and the refluxed desulfurizer is sprayed out through the liquid outlet head 1062, so that the liquid outlet head 1062 drives the flow disturbance channel 1061 to rotate to disturb the flow of the desulfurizer;

[0049] During 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 cylinder 2026 through the pipe 2025, and the second piston 2027 is driven by the hydraulic pressure to move, the second piston 2027 drives the arc rod 2028 to move, and the arc rod 2028 drives the sealing plug 204 to move, so that the sealing plug 204 performs a pressurization process on the low molecular weight liquid. After the sealing plug 204 moves for a period of time, the valve stem 2055 contacts the baffle 109, so that the valve stem 2055 drives the sealing body 205 4 is separated from the valve seat 2051. At this time, the gas is discharged and the pressure is reduced through the gas 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 is separated from the gas seat 2061. At this time, the low-molecular gas can be ventilated through the gas outlet 2062. Then, the electric push rod 2011 is retracted, and the sealing plug 204 is controlled by the hydraulic component 202 to reset. Then, the sealing plug 204 is reciprocated to switch between pressurization and depressurization, thereby accelerating the desulfurization effect of the low-molecular gas. After desulfurization, the gas is discharged through the gas outlet 2052.

[0050] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A low-gas hydrogen recovery and utilization device in a diesel hydrogenation preparation process, comprising a desulfurization mechanism (100), characterized in that: The desulfurization mechanism (100) is provided with a pressurizing mechanism (200); The desulfurization mechanism (100) includes a desulfurization tank (101), a conveying assembly (103) is provided on the desulfurization tank (101), and the conveying assembly (103) includes a liquid inlet pipe (1032), the liquid inlet pipe (1032) passes through the desulfurization tank (101), and a spiral guide channel (105) arranged in the desulfurization tank (101) is fixedly installed on the liquid inlet pipe (1032), and a plurality of baffles (109) are fixedly connected to the spiral guide channel (105). A nozzle group (107) is installed on the guide channel (105) and passes through the spiral guide channel (105). The nozzle group (107) is connected to the conveying component (103) and the disturbance component (106). The disturbance component (106) passes through the liquid inlet pipe (1032) below, and a temperature guide plate (108) is provided on the disturbance component (106). The desulfurizer is conveyed through the conveying component (103) and sprayed out through the nozzle group (107) to fully contact with the low-pressure gas in the spiral guide channel (105); The boosting mechanism (200) includes a control component (201), the control component (201) is connected to the desulfurization tank (101) and multiple hydraulic components (202), one end of the hydraulic component (202) is connected to a sealing plug (204), the sealing plug (204) is sealed and arranged on the spiral guide channel (105), and the sealing plug (204) is provided with an exhaust component (205), the sealing plug (204) is also connected to the outlet component (206) through the connecting component (203), and multiple outlet components (206) are arranged on the nozzle group (107), and the control component (201) cooperates with the hydraulic component (202) to realize the movement of the sealing plug (204), thereby achieving a low-molecular boosting effect; after boosting, the exhaust component (205) and the baffle (109) are blocked to automatically exhaust and reduce the pressure, so that the boosting and reducing pressure switching is carried out; Both sides of the nozzle group (107) are also connected to the liquid inlet pipe (1032) and the inner wall of the desulfurization tank (101), thereby forming a closed space, and both sides of the sealing plug (204) are also sealed and connected to the liquid inlet pipe (1032) and the desulfurization tank (101), thereby forming a closed space; The exhaust assembly (205) includes a valve seat (2051), the valve seat (2051) is mounted on the sealing plug (204), a plurality of air outlets (2052) are provided on the valve seat (2051), a valve stem (2055) is passed through the valve seat (2051), one end of the valve stem (2055) is fixedly connected to a sealing body (2054), the sealing body (2054) is in contact with the valve seat (2051), and a first spring (2053) is fixedly connected between the other end of the valve stem (2055) and the valve seat (2051); The connecting assembly (203) comprises an arc-shaped connecting rod (2031), the arc-shaped connecting rod (2031) slides across the spiral flow guide channel (105), one end of the arc-shaped connecting rod (2031) is fixedly connected to a rope (2032), and the rope (2032) is fixedly connected to the sealing plug (204); The air outlet assembly (206) includes an air seat (2061), which is installed on the nozzle group (107). A plurality of exhaust ports (2062) are provided on the air seat (2061), and a movable rod (2065) is passed 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), and a sealing ball (2063) is fixedly connected to the other end of the movable rod (2065). The sealing ball (2063) is fitted on the air seat (2061), and the sealing ball (2063) is fixedly connected to the arc connecting rod (2031).

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

3. The low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 2, characterized in that: The delivery assembly (103) further comprises a delivery pump (1031), the delivery pump (1031) being fixedly mounted on the desulfurization tank (101), the delivery pump (1031) being in communication with a liquid inlet pipe (1032) and a sulfur outlet pipe (1033), the sulfur outlet pipe (1033) passing through the liquid inlet pipe (1032) and penetrating into the desulfurization tank (101) to be in communication with the nozzle group (107), and a plurality of liquid inlet heads (1034) being mounted below the liquid inlet pipe (1032).

4. The low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 3, characterized in that: The disturbance component (106) comprises a shunt pipe (1063) and a disturbance channel (1061), a plurality of thermal conductive plates (108) are fixedly mounted on the shunt pipe (1063), and the thermal conductive plates (108) are arranged in the liquid inlet pipe (1032), and the shape of the thermal conductive plates (108) is wavy.

5. The low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 4, characterized in that: The diversion pipe (1063) is in communication with the sulfur outlet pipe (1033); the flow disturbance channel (1061) is rotatably mounted on the diversion pipe (1063) via a bearing, and the flow disturbance channel (1061) is in communication with the diversion pipe (1063); and a plurality of tangentially arranged liquid outlet heads (1062) are mounted on the flow disturbance channel (1061).

6. The low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 5, characterized in that: The control assembly (201) comprises an electric push rod (2011), the electric push rod (2011) is fixedly mounted on the desulfurization tank (101), and one end of the electric push rod (2011) is fixedly connected to a connecting rod (2012).

7. The low-gas hydrogen recovery and utilization device in the diesel hydrogenation preparation process according to claim 6, characterized in that: The hydraulic assembly (202) includes a cylinder (2024), a first piston (2023) is provided inside the cylinder (2024), a piston rod (2022) is fixedly connected to one side of the first piston (2023), the piston rod (2022) passes through the cylinder (2024) and is fixedly connected to the connecting rod (2012), and a pipe (2025) is connected to one side of the cylinder (2024), and the pipe (2025) passes through the desulfurization tank. (101) and is connected to the arc cylinder (2026), the arc cylinder (2026) is fixedly mounted on the spiral flow guide channel (105) through two fixing members (2021), a second piston (2027) is provided inside the arc cylinder (2026), one side of the second piston (2027) is fixedly connected to an arc rod (2028), the arc rod (2028) passes through the arc cylinder (2026) and is fixedly connected to the sealing plug (204).

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