Energy-saving equipment for reducing dry gas to produce ethylbenzene

Abstract

The invention relates to the technical field of preparing ethylbenzene from dry gas, and in particular to an energy-saving device for preparing ethylbenzene from dry gas, comprising a hydrolysis reaction tank, a propylene removal box, a cracking tank and a recovery tank, wherein the propylene removal box is fixedly connected to the top of the hydrolysis reaction tank, the cracking tank is movably installed on the outside of the hydrolysis reaction tank, the recovery tank is fixedly connected to the top of the cracking tank, the top of the hydrolysis reaction tank is fixedly connected to a connecting shell, a booster component is arranged inside the connecting shell, two groups of conveying pipes are fixedly connected to the outside of the connecting shell, one end of the conveying pipe close to the propylene removal box is fixedly connected to a connecting bucket, the conveying pipe extends to the inside of the connecting shell and is fixedly connected to a guide component, a stirring component is arranged inside the propylene removal box; the booster component is used to increase the air pressure of the gas inside the connecting shell. Compared with the existing energy-saving equipment, the invention can improve the overall practicality of the energy-saving equipment through design.

Description

Technical Field

[0001] The invention relates to the technical field of preparing ethylbenzene from dry gas, and in particular to energy-saving equipment for preparing ethylbenzene from dry gas. Background Art

[0002] Ethylbenzene is an important organic chemical raw material, mainly used to produce styrene, and then to produce polystyrene, engineering plastics and styrene-butadiene rubber. In recent years, with the development of the economy, my country's demand for ethylbenzene has continued to grow, and it has been in short supply all year round. More than 40% of the demand depends on imports each year. At the same time, with the continuous development of my country's oil refining industry, a large amount of dry gas is produced as a by-product in the refinery, and a considerable amount of ethylene is usually used as fuel or directly burned in a flare, resulting in a huge waste of resources. The dry gas to ethylbenzene technology can effectively utilize this part of the dry gas used as fuel to produce high-value-added ethylbenzene products that are in short supply in the market, which can greatly improve the economic benefits of the refinery. The dry gas to ethylbenzene technology is an extension of the ethylene to ethylbenzene technology that began to develop in the middle of the last century. The raw material has changed from high-concentration ethylene or pure ethylene to dilute ethylene or dry gas with a lower ethylene concentration. For conventional catalytic cracking dry gas, the ethylene concentration is about 5-20%, and inert gases such as hydrogen, methane, and ethane account for a large part. These inert gases are mixed in the reaction products of ethylene to ethylbenzene and directly enter the distillation separation system such as the benzene tower, which will bring a heavy load to the device. The gas flux in the tower is several times or even dozens of times larger than the gas flux to be treated under other process conditions. The liquid phase flux in the bottom of the tower will also increase accordingly, which will bring great energy consumption. At the same time, since the gas and liquid phases are in equilibrium, the exhaust gas at the top of the tower will also carry away a large amount of benzene and other aromatics. The consumption of this part of benzene will not only cause economic losses, but also bring great harm to the natural environment and human health.

[0003] Therefore, compared with the ethylene-to-ethylbenzene technology, what is more worthy of attention in the dry gas-to-ethylbenzene technology is: how to effectively separate the gas-liquid reaction products of the dry gas-to-ethylbenzene process and recover the benzene in the tail gas without affecting the yield and purity of the ethylbenzene product. The separation method of the conventional ethylene-to-ethylbenzene process requires cooling the reaction products to room temperature, flash absorbing them twice or more at different pressures, and then heating them to a distillation system such as a benzene tower. This process not only consumes a lot of energy, but the flash vaporized gas phase and the non-condensable gas at the top of the benzene tower will also carry benzene.

[0004] After searching, announcement number CN214716562U discloses an energy-saving device for reducing dry gas to produce ethylbenzene, including a catalytic reaction tank, a liquid inlet barrel is fixedly installed on the upper side of the catalytic reaction tank, a depropylene box is fixedly installed on the upper side of the liquid inlet barrel, a cracking tank is arranged on the right side of the catalytic reaction tank, a recovery tank is fixedly installed on the upper side of the cracking tank, a support plate is fixedly installed on the lower side of the catalytic reaction tank and the recovery tank, a universal wheel is arranged on the lower side of the support plate, an air inlet is arranged on the left side of the catalytic reaction tank, and a drain pipe is arranged on the lower side of the air inlet. In the energy-saving equipment for preparing ethylbenzene by reducing dry gas, waste heat in the cracking tank enters the cavity through the recovery pipe, and the inner reaction tank can be heated, so that resources can be better recycled and utilized without consuming a large amount of energy and raw materials, thereby reducing investment costs and improving production efficiency. It is ensured that the purity of ethylbenzene can be higher, and the whole equipment is compact and light, and is more convenient to move. The defect is that when the above-mentioned equipment reacts with the raw material and the gas, the gas and the raw material are mixed and reacted only by spraying liquid through the water spray hole. During the reaction, a longer reaction time is required, thereby increasing the production time of the reaction and reducing the production efficiency. Therefore, it is particularly important to improve the existing energy-saving equipment and design a new energy-saving equipment for preparing ethylbenzene by reducing dry gas to solve the above-mentioned technical defects and improve the practicality of the overall energy-saving equipment. Summary of the invention

[0005] The object of the present invention is to provide an energy-saving device for reducing the production of ethylbenzene from dry gas. When the liquid is introduced into the interior of the conveying pipe, the introduced liquid is guided by the guide component so that the liquid can be discharged from the interior of the conveying pipe at an accelerated rate and introduced into the interior of the connecting shell. At the same time, the liquid can be broken up to increase the range of liquid spraying and fully contact the raw material. When the pressure plate is displaced, the gas inside the connecting shell can be squeezed to increase the gas pressure inside the connecting shell, so that the gas and the raw material can be effectively mixed and reacted, the reaction can be accelerated, and the production time can be shortened to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An energy-saving device for reducing dry gas to produce ethylbenzene, comprising a hydrochemical reaction tank, a depropylene box, a cracking tank and a recovery tank, wherein the depropylene box is fixedly connected to the top of the hydrochemical reaction tank, the cracking tank is movably installed on the outside of the hydrochemical reaction tank, the recovery tank is fixedly connected to the top of the cracking tank, the top of the hydrochemical reaction tank is fixedly connected to a connecting shell, a booster assembly is arranged inside the connecting shell, two groups of conveying pipes are fixedly connected to the outside of the connecting shell, one end of the conveying pipe close to the depropylene box is fixedly connected to a connecting bucket, the conveying pipe extends to the inside of the connecting shell and is fixedly connected to a guide assembly, and a stirring assembly is arranged inside the depropylene box;

[0008] The booster assembly is used to increase the gas pressure of the gas inside the connection shell. The booster assembly consists of two groups of connection frames, two groups of rotating blocks, two groups of moving blocks, two groups of moving frames and a pressing plate. The two groups of connection frames are respectively fixedly connected to the two ends inside the connection shell, the rotating blocks are rotatably connected to the inside of the connection frames, the moving blocks are slidably connected to the inside of the connection frame and are located on the outside of the rotating blocks, the moving frames are fixedly connected to the outside of the moving blocks, and the pressing plates are slidably connected to the inside of the connection shell and are located at the bottom of the two groups of moving frames.

[0009] The guide assembly is used to guide the liquid introduced into the delivery pipe;

[0010] The stirring component is used for stirring the raw materials inside the propylene removal box.

[0011] The specific method of using the booster component, guide component and stirring component in this scheme is as follows: introduce the raw material into the interior of the propylene stripping box, start the second drive motor, drive the rotating frame to rotate, drive the rotating plate to move, and when the rotating frame rotates, drive the multiple sets of second drive gears at the bottom to move. When the second drive gear moves, the second drive gear is rotated through the meshing connection with the gear ring, and the rotating plate is driven to rotate, so that the raw material is stirred in multiple directions, which can speed up the propylene stripping process, and the raw material is introduced into the interior of the delivery pipe through the connecting bucket. When the liquid is introduced into the interior of the delivery pipe, the introduced liquid is guided by the guide component so that the liquid can be discharged from the delivery pipe faster. The liquid is introduced into the interior of the connecting shell, and at the same time, it can break up the liquid, increase the range of liquid spraying, and fully contact with the raw material. The first drive motor is started to drive the first drive gear to rotate, so that the meshing strip is displaced, and the other set of first drive gears is driven to rotate, thereby making the two sets of first drive gears rotate, driving the rotating block to rotate, and making the reciprocating spiral groove on the outside thereof rotate. When the moving frame is displaced, it drives the pressure plate to displace. When the pressure plate is displaced, it can squeeze the gas inside the connecting shell, increase the gas pressure inside the connecting shell, and cooperate with the liquid level introduced by the conveying pipe to accelerate the reaction, shorten the production time, and effectively mix the gas with the raw material for reaction.

[0012] As a preferred solution of the present invention, a reciprocating spiral groove for driving the displacement of the moving block is opened on the outer side of the rotating block, the internal structure size of the reciprocating spiral groove is designed to correspond to the external structure size of the moving block, and the moving block and the reciprocating spiral groove are slidably connected.

[0013] As a preferred solution of the present invention, the rotating block extends to the top of the connecting shell and is fixedly connected to the first driving gear, two groups of the first driving gears are connected by a meshing bar, and the meshing bar is meshingly connected to the first driving gear. A first driving motor is provided at the top of the connecting shell and above the first driving gear, and the driving end of the first driving motor is fixedly connected to the first driving gear.

[0014] As a preferred solution of the present invention, the movable frame is slidably connected to the connecting frame, the movable frame is fixedly connected to the pressing plate, and the connecting bucket is communicated with the propylene removal box.

[0015] As a preferred solution of the present invention, the guide assembly consists of a connecting rod, a spiral piece, a rotating rod and a spiral blade. The connecting rod is fixedly connected to the interior of the conveying pipe and extends to one end inside the connecting shell, the spiral piece is fixedly connected to the outside of the connecting rod, the rotating rod is rotatably connected to one end of the connecting rod extending to the outside of the conveying pipe, and the spiral blade is fixedly connected to one end of the rotating rod away from the connecting rod.

[0016] As a preferred solution of the present invention, one end of the spiral sheet away from the connecting rod is in contact with the inner wall of the delivery pipe, and an acceleration groove for guiding the liquid is formed between the spiral sheet, the delivery pipe and the connecting rod.

[0017] As a preferred solution of the present invention, one end of the delivery pipe close to the spiral blade is fixedly connected to a connecting ring, and a plurality of spray holes are provided inside the connecting ring.

[0018] As a preferred solution of the present invention, the stirring assembly is composed of a rotating frame, multiple groups of rotating plates, multiple groups of second driving gears and a gear ring. The rotating frame is rotatably connected to the interior of the depropylene box, the multiple groups of rotating plates are respectively rotatably connected to the four sides of the rotating frame, the multiple groups of second driving gears are respectively rotatably connected to the four sides of the top of the rotating frame, and the gear ring is fixedly connected to the top of the interior of the depropylene box.

[0019] As a preferred solution of the present invention, the second driving gear is meshedly connected to the gear ring, the top of the depropylene box is fixedly connected to a second driving motor, and the driving end of the second driving motor extends to the interior of the depropylene box and is fixedly connected to the rotating frame.

[0020] As a preferred solution of the present invention, a feed hopper and a water inlet pipe are respectively provided at the top of the propylene desorption box and at both ends of the second drive motor, an air return pipe is provided at one end of the recovery tank close to the catalytic reaction tank, a recovery pipe is provided at one end of the cracking tank close to the catalytic reaction tank, an air transmission pipe is provided below the recovery pipe and between the catalytic reaction tank and the cracking tank, and an air inlet pipe is provided at one end of the catalytic reaction tank away from the cracking tank.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, through the design of the booster component and the guide component, when the liquid is introduced into the interior of the delivery pipe, the guide component guides the introduced liquid, so that the liquid can be accelerated to be discharged from the interior of the delivery pipe and introduced into the interior of the connecting shell. At the same time, the liquid can be broken up to increase the range of liquid spraying and fully contact with the raw material. When the pressure plate is displaced, the gas inside the connecting shell can be squeezed to increase the gas pressure inside the connecting shell, so that the gas and the raw material are effectively mixed and reacted.

[0023] 2. In the present invention, through the design of the stirring component, when the raw material is introduced into the propylene removal box, the rotating frame rotates, driving the multiple groups of second drive gears at the bottom thereof to move, and the second drive gear moves, and through the meshing connection with the gear ring, the second drive gear rotates, driving the rotating plate to rotate, thereby making the raw material stirred in multiple directions, which can speed up the propylene removal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the hydrolysis reaction tank of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the propylene removal box of the present invention;

[0027] Figure 4 This is a schematic diagram of the connecting shell structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the booster assembly of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the rotating block of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the guide assembly of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the stirring assembly of the present invention;

[0032] Fig. 9 It is a schematic diagram of the rotating frame structure of the present invention.

[0033] In the figure: 1, catalytic reaction tank; 2, propylene removal box; 3, cracking tank; 4, recovery tank; 5, connecting shell; 6, booster assembly; 7, delivery pipe; 8, connecting bucket; 9, guide assembly; 10, stirring assembly; 11, connecting frame; 12, rotating block; 13, moving block; 14, moving frame; 15, pressing plate; 16, reciprocating spiral groove; 17, first driving gear; 18, meshing bar; 19, connecting rod; 20, spiral piece; 21, rotating rod; 22, spiral blade; 23, rotating frame; 24, rotating plate; 25, second driving gear; 26, gear ring; 27, feeding hopper; 28, water inlet pipe; 29, air return pipe; 30, recovery pipe; 31, air delivery pipe; 32, air inlet pipe. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Example:

[0036] See also Figure 1-Figure 9 , the present invention provides a technical solution:

[0037] An energy-saving device for reducing dry gas to produce ethylbenzene, comprising a hydrolysis reaction tank 1, a depropylene box 2, a cracking tank 3 and a recovery tank 4, wherein the depropylene box 2 is fixedly connected to the top of the hydrolysis reaction tank 1, the cracking tank 3 is movably installed on the outside of the hydrolysis reaction tank 1, the recovery tank 4 is fixedly connected to the top of the cracking tank 3, a connecting shell 5 is fixedly connected to the top of the hydrolysis reaction tank 1, a booster assembly 6 is arranged inside the connecting shell 5, two groups of conveying pipes 7 are fixedly connected to the outside of the connecting shell 5, a connecting bucket 8 is fixedly connected to one end of the conveying pipe 7 close to the depropylene box 2, a guide assembly 9 is fixedly connected to the conveying pipe 7 extending to the inside of the connecting shell 5, and a stirring assembly 10 is arranged inside the depropylene box 2;

[0038] The booster assembly 6 is used to increase the gas pressure inside the connection shell 5. The booster assembly 6 is composed of two groups of connection frames 11, two groups of rotating blocks 12, two groups of moving blocks 13, two groups of moving frames 14 and a pressing plate 15. The two groups of connection frames 11 are respectively fixedly connected to the two ends inside the connection shell 5, the rotating block 12 is rotatably connected to the inside of the connection frame 11, the moving block 13 is slidably connected to the inside of the connection frame and is located on the outside of the rotating block 12, the moving frame 14 is fixedly connected to the outside of the moving block 13, and the pressing plate 15 is slidably connected to the inside of the connection shell 5 and is located at the bottom of the two groups of moving frames 14;

[0039] The guide assembly 9 is used to guide the liquid introduced into the delivery pipe 7;

[0040] The stirring assembly 10 is used to stir the raw materials in the propylene removal tank 2 .

[0041] Furthermore, a reciprocating spiral groove 16 for driving the movable block 13 to move is provided on the outer side of the rotating block 12. The internal structure size of the reciprocating spiral groove 16 is designed to correspond to the external structure size of the movable block 13. The movable block 13 and the reciprocating spiral groove 16 are slidably connected. The movable block 13 and the reciprocating spiral groove 16 are slidably connected. When the rotating block 12 rotates and drives the reciprocating spiral groove 16 to rotate, the movable block 13 moves along the inner wall of the reciprocating spiral groove 16, driving the movable frame 14 to move.

[0042] Among them, the rotating block 12 extends to the top of the connecting shell 5 and is fixedly connected with a first driving gear 17. The two groups of first driving gears 17 are connected by a meshing bar 18. The meshing bar 18 is meshingly connected with the first driving gear 17. A first driving motor is provided at the top of the connecting shell 5 and above the first driving gear 17. The driving end of the first driving motor is fixedly connected to the first driving gear 17. The first driving motor is started to drive the first driving gear 17 to rotate, so that the meshing bar 18 is displaced, and the other group of first driving gears 17 is driven to rotate, thereby causing the two groups of first driving gears 17 to rotate, driving the rotating block 12 to rotate, and causing the reciprocating spiral groove 16 on its outer side to rotate.

[0043] Secondly, the movable frame 14 is slidably connected to the connecting frame 11, the movable frame 14 is fixedly connected to the pressure plate 15, the connecting bucket 8 is connected to the propylene removal box 2, and when the movable frame 14 is displaced, it is guided by the connecting frame 11 to prevent it from being offset. At the same time, when the movable frame 14 is displaced, the pressure plate 15 is driven to displace. When the pressure plate 15 is displaced, the gas inside the connecting shell 5 can be squeezed to increase the gas pressure inside the connecting shell 5, so that the gas and the raw material are effectively mixed and reacted.

[0044] Furthermore, the guide assembly 9 is composed of a connecting rod 19, a spiral piece 20, a rotating rod 21 and a spiral blade 22. The connecting rod 19 is fixedly connected to the inside of the conveying pipe 7 and extends to one end inside the connecting shell 5. The spiral piece 20 is fixedly connected to the outside of the connecting rod 19. The rotating rod 21 is rotatably connected to one end of the connecting rod 19 extending to the outside of the conveying pipe 7. The spiral blade 22 is fixedly connected to one end of the rotating rod 21 away from the connecting rod 19. When the liquid is introduced into the interior of the conveying pipe 7, the introduced liquid is guided by the guide assembly 9, so that the liquid can be discharged from the interior of the conveying pipe 7 at an accelerated speed and introduced into the interior of the connecting shell 5. At the same time, the liquid can be broken up to increase the range of liquid spraying and fully contact with the raw materials.

[0045] Furthermore, one end of the spiral piece 20 away from the connecting rod 19 is in contact with the inner wall of the delivery tube 7, and an acceleration groove for guiding the liquid is formed between the spiral piece 20, the delivery tube 7 and the connecting rod 19. When the liquid is introduced into the interior of the delivery tube 7, it contacts the connecting rod 19 and the spiral piece 20, and the liquid is spirally accelerated and guided through the formed acceleration groove.

[0046] Furthermore, one end of the delivery pipe 7 close to the spiral blade 22 is fixedly connected with a connecting ring, and a plurality of spray holes are provided inside the connecting ring. The accelerated liquid contacts the connecting ring, and is discharged from the interior of the delivery pipe 7 through the plurality of spray holes, and contacts the spiral blade 22. The liquid is broken up by the spiral blade 22, thereby increasing the range of liquid spraying and contacting the raw materials in an all-round manner.

[0047] Furthermore, the stirring assembly 10 is composed of a rotating frame 23, multiple groups of rotating plates 24, multiple groups of second driving gears 25 and a gear ring 26. The rotating frame 23 is rotatably connected to the inside of the depropylene box 2, the multiple groups of rotating plates 24 are respectively rotatably connected to the four sides of the rotating frame 23, the multiple groups of second driving gears 25 are respectively rotatably connected to the four sides of the top of the rotating frame 23, and the gear ring 26 is fixedly connected to the top of the inside of the depropylene box 2. When the raw materials are introduced into the depropylene box 2, the stirring assembly 10 is used to stir the raw materials in multiple directions, which can speed up the depropylene process.

[0048] Furthermore, the second driving gear 25 is meshedly connected with the gear ring 26. The top of the propylene stripping box 2 is fixedly connected with a second driving motor. The driving end of the second driving motor extends to the interior of the propylene stripping box 2 and is fixedly connected with the rotating frame 23. The second driving motor is started to drive the rotating frame 23 to rotate, and the rotating plate 24 is driven to move. When the rotating frame 23 rotates, the multiple groups of second driving gears 25 at the bottom thereof are driven to move. When the second driving gear 25 moves, it is meshed with the gear ring 26 to rotate the second driving gear 25, and the rotating plate 24 is driven to rotate, thereby stirring the raw materials in multiple directions, which can speed up the propylene stripping process.

[0049] Furthermore, a feed hopper 27 and a water inlet pipe 28 are respectively provided at the top of the depropylene box 2 and at both ends of the second drive motor, a return air pipe 29 is provided at one end of the recovery tank 4 close to the catalytic reaction tank 1, a recovery pipe 30 is provided at one end of the cracking tank 3 close to the catalytic reaction tank 1, a gas transmission pipe 31 is provided below the recovery pipe 30 and between the catalytic reaction tank 1 and the cracking tank 3, an air inlet pipe 32 is provided at one end of the catalytic reaction tank 1 away from the cracking tank 3, the raw material is heated in the depropylene box 2, the gas enters the catalytic reaction tank 1 from the air inlet pipe 32, a return air pipe 29 is provided between the recovery tank 4 and the catalytic reaction tank 1, and the gas in the recovery tank 4 can return to the catalytic reaction tank 1, thereby better recycling resources.

[0050] The hydrolysis reaction tank 1, the depropylene box 2, the cracking tank 3 and the recovery tank 4 in the present invention are operated in detail in the comparative document "Announcement No. CN214716562U A Energy-Saving Equipment for Reducing Dry Gas to Prepare Ethylbenzene", so in this scheme, they are not described in detail.

[0051] In this embodiment, the implementation scenario is specifically as follows: in actual use, the raw material is introduced into the interior of the propylene stripping box 2, and the second drive motor is started to drive the rotating frame 23 to rotate, and the rotating plate 24 is driven to move. When the rotating frame 23 rotates, the multiple groups of second drive gears 25 at the bottom thereof are driven to move. When the second drive gear 25 moves, the second drive gear 25 is rotated through the meshing connection with the gear ring 26, and the rotating plate 24 is driven to rotate, so that the raw material is stirred in multiple directions, and the propylene stripping process can be accelerated. The raw material is introduced into the interior of the delivery pipe 7 through the connecting bucket 8. When the liquid is introduced into the interior of the delivery pipe 7, the introduced liquid is guided by the guide component 9, so that the liquid can be discharged from the interior of the delivery pipe 7 at an accelerated speed and introduced into the interior of the connecting shell 5, and at the same time, the liquid can be beaten Dispersion, increase the range of liquid spraying, fully contact with the raw materials, start the first drive motor, drive the first drive gear 17 to rotate, so that the meshing bar 18 is displaced, drive the other group of first drive gears 17 to rotate, so that the two groups of first drive gears 17 are rotated, drive the rotating block 12 to rotate, and make the reciprocating spiral groove 16 on the outside thereof rotate. When the moving frame 14 is displaced, the pressing plate 15 is driven to displace. When the pressing plate 15 is displaced, the gas inside the connecting shell 5 can be squeezed to increase the gas pressure inside the connecting shell 5. In conjunction with the liquid level introduced by the conveying pipe 7, the reaction can be accelerated, the production time can be shortened, and the gas and the raw materials can be effectively mixed and reacted. Compared with the existing energy-saving equipment, the present invention can improve the overall practicality of the energy-saving equipment through design.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving device for reducing dry gas to produce ethylbenzene, comprising a hydrolysis reaction tank (1), a propylene removal tank (2), a cracking tank (3) and a recovery tank (4), characterized in that: The depropylene box (2) is fixedly connected to the top of the hydrolysis reaction tank (1), the cracking tank (3) is movably installed on the outside of the hydrolysis reaction tank (1), the recovery tank (4) is fixedly connected to the top of the cracking tank (3), the top of the hydrolysis reaction tank (1) is fixedly connected to a connecting shell (5), a booster assembly (6) is provided inside the connecting shell (5), two groups of conveying pipes (7) are fixedly connected to the outside of the connecting shell (5), one end of the conveying pipe (7) close to the depropylene box (2) is fixedly connected to a connecting bucket (8), the conveying pipe (7) extends to the inside of the connecting shell (5) and is fixedly connected to a guide assembly (9), and a stirring assembly (10) is provided inside the depropylene box (2); The booster assembly (6) is used to increase the gas pressure of the gas inside the connection shell (5). The booster assembly (6) is composed of two groups of connection frames (11), two groups of rotating blocks (12), two groups of moving blocks (13), two groups of moving frames (14) and a pressure plate (15). The two groups of the connection frames (11) are respectively fixedly connected to the two ends inside the connection shell (5). The rotating blocks (12) are rotatably connected to the inside of the connection frames (11). The moving blocks (13) are slidably connected to the inside of the connection frames (11) and are located on the outside of the rotating blocks (12). The moving frames (14) are fixedly connected to the outside of the moving blocks (13). The pressure plate (15) is slidably connected to the inside of the connection shell (5) and is located at the bottom of the two groups of moving frames (14). The guide assembly (9) is used to guide the liquid introduced into the delivery pipe (7); The stirring assembly (10) is used to stir the raw materials inside the propylene removal box (2).

2. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 1, characterized in that: A reciprocating spiral groove (16) for driving the moving block (13) to move is provided on the outer side of the rotating block (12); the internal structure size of the reciprocating spiral groove (16) is designed to correspond to the external structure size of the moving block (13); and the moving block (13) and the reciprocating spiral groove (16) are slidably connected.

3. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 1, characterized in that: The rotating block (12) extends to the top of the connecting shell (5) and is fixedly connected to a first driving gear (17). Two groups of the first driving gears (17) are connected via a meshing bar (18). The meshing bar (18) is meshingly connected to the first driving gear (17). A first driving motor is provided at the top of the connecting shell (5) and above the first driving gear (17). The driving end of the first driving motor is fixedly connected to the first driving gear (17).

4. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 1, characterized in that: The movable frame (14) is slidably connected to the connecting frame (11), the movable frame (14) is fixedly connected to the pressing plate (15), and the connecting bucket (8) is communicated with the propylene removal box (2).

5. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 1, characterized in that: The guide assembly (9) is composed of a connecting rod (19), a spiral piece (20), a rotating rod (21) and a spiral blade (22); the connecting rod (19) is fixedly connected to the inside of the conveying pipe (7) and extends to one end inside the connecting shell (5); the spiral piece (20) is fixedly connected to the outside of the connecting rod (19); the rotating rod (21) is rotatably connected to one end of the connecting rod (19) extending to the outside of the conveying pipe (7); and the spiral blade (22) is fixedly connected to one end of the rotating rod (21) away from the connecting rod (19).

6. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 5, characterized in that: One end of the spiral sheet (20) away from the connecting rod (19) is in contact with the inner wall of the delivery pipe (7), and an acceleration groove for guiding the liquid is formed between the spiral sheet (20), the delivery pipe (7) and the connecting rod (19).

7. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 5, characterized in that: One end of the delivery pipe (7) close to the spiral blade (22) is fixedly connected to a connecting ring, and a plurality of spray holes are provided inside the connecting ring.

8. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 1, characterized in that: The stirring assembly (10) is composed of a rotating frame (23), a plurality of rotating plates (24), a plurality of second driving gears (25) and a gear ring (26); the rotating frame (23) is rotatably connected to the inside of the propylene removal box (2); the plurality of rotating plates (24) are rotatably connected to the four sides of the rotating frame (23); the plurality of second driving gears (25) are rotatably connected to the four sides of the top of the rotating frame (23); and the gear ring (26) is fixedly connected to the top of the inside of the propylene removal box (2).

9. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 9, characterized in that: The second driving gear (25) is meshingly connected to the gear ring (26); a second driving motor is fixedly connected to the top of the propylene stripping box (2); a driving end of the second driving motor extends to the interior of the propylene stripping box (2) and is fixedly connected to the rotating frame (23).

10. The energy-saving device for reducing dry gas to produce ethylbenzene according to claim 9, characterized in that: A feed hopper (27) and a water inlet pipe (28) are respectively provided at the top of the propylene removal box (2) and at both ends of the second drive motor; a return air pipe (29) is provided at one end of the recovery tank (4) close to the catalytic reaction tank (1); a recovery pipe (30) is provided at one end of the cracking tank (3) close to the catalytic reaction tank (1); an air delivery pipe (31) is provided below the recovery pipe (30) and between the catalytic reaction tank (1) and the cracking tank (3); and an air inlet pipe (32) is provided at one end of the catalytic reaction tank (1) away from the cracking tank (3).

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