A feeding device for producing cyclopentadiene

Abstract

The invention relates to the technical field related to mixing equipment, and discloses a feeding device for producing cyclopentadiene, comprising a liquid injector for injecting crude dicyclopentadiene, a gas injector for injecting water vapor or nitrogen batching gas, and a mixing feeding device. The mixing feeding device has a mixing chamber extending up and down in the middle, a central rotating cylinder is rotatably arranged in the mixing chamber, a fixed air-jet sleeve is arranged outside the central rotating cylinder, a liquid outlet is opened on the side wall of the central rotating cylinder, and a water vapor nozzle facing the central rotating cylinder is provided on the inner wall of the air-jet sleeve. The central rotating cylinder is in a high-speed rotating process, and the ejected crude dicyclopentadiene is a multi-layer liquid in a spiral shape around the central rotating cylinder. The water vapor is ejected toward the multi-layer liquid at a high speed through the water vapor nozzle on the air-jet sleeve, and the water vapor and the crude dicyclopentadiene collide and mix violently, so that the water vapor and the dicyclopentadiene are fully mixed.

Description

Technical Field

[0001] The present invention belongs to the technical field related to mixing equipment, and more specifically, particularly relates to a feeding device for producing cyclopentadiene. Background Art

[0002] Cyclopentadiene (CPD for short) has a wide range of uses, such as synthetic pesticides, plastics, resins, rubber, cyclopentadiene compounds, and the production of liquid fuels, shock and desiccant agents, which all require a large amount of high-purity CPD. At present, manufacturers of CPD in my country generally use the method of directly heating and distilling dicyclopentadiene (DCPD for short) to decompose DCPD into CPD (liquid phase depolymerization method), but this process method is economically uneconomical due to the large production equipment, slow decomposition rate, energy consumption and long production process. There are also a few manufacturers who use the tubular gas phase depolymerization method to decompose DCPD into CPD. This process method can save 50% of energy compared to the liquid phase depolymerization method, increase the rate by 4 times, and improve the yield of CPD. However, this method has a relatively large disadvantage that it is easy to coke in the depolymerization tube, affecting the thermal conductivity. In addition, regular coke cleaning will also shorten the service life of the depolymerization tube.

[0003] The prior art discloses a method for preparing cyclopentadiene, which uses DCPD mixed with ingredient water vapor for depolymerization, and the concentration of the product CPD can reach more than 96%. The existing equipment for preparing cyclopentadiene also has the following defects:

[0004] In the existing device for mixing liquid DCPD and gaseous water vapor, due to the different densities of the two, the fully mixed state of the two is maintained for a short time, so the depolymerization reaction of DCPD occurs for a short time and the reaction process cannot be maintained efficiently and continuously. Therefore, in view of this, the existing structure and defects are studied and improved to provide a feeding device for producing cyclopentadiene, in order to achieve a more practical purpose. Summary of the invention

[0005] The present invention provides a feeding device for producing cyclopentadiene, which is used to overcome the above-mentioned defects in the prior art.

[0006] The purpose and effect of the feed device for producing cyclopentadiene of the present invention are achieved by the following specific technical means:

[0007] A feeding device for producing cyclopentadiene, comprising a liquid injector for injecting crude dicyclopentadiene, a gas injector for injecting water vapor or nitrogen batching gas, and a mixed feeding device, wherein the liquid injector and the gas injector are respectively arranged on both sides of the mixed feeding device and connected to the mixed feeding device, wherein the middle of the mixed feeding device has a mixing chamber extending up and down, a central rotating cylinder is rotatably arranged in the mixing chamber, a fixed air-jet sleeve is arranged outside the central rotating cylinder, the central rotating cylinder is communicated with the liquid injector through a liquid channel, the gas injector is communicated with the air-jet sleeve through a gas channel, a liquid outlet is opened on the side wall of the central rotating cylinder, and the The inner wall of the jet sleeve has a water vapor nozzle facing the central rotating cylinder, and the jet sleeve is provided with an elastic shielding plate for shielding the water vapor nozzle, and the elastic shielding plate can open the water vapor nozzle under external air pressure, and the lower part of the jet sleeve is provided with a high-frequency vibration screen cylinder, and a high-frequency vibration generator is arranged between the jet sleeve and the high-frequency vibration screen cylinder, the upper part of the high-frequency vibration screen cylinder is a guide cylinder, and the lower part is a vibration cylinder with a plurality of ventilation holes, and the lower end of the central rotating cylinder is fixedly connected with a secondary jet cylinder arranged in the high-frequency vibration screen cylinder, and the secondary jet cylinder is connected to the gas injector through a gas pipeline, and the secondary jet cylinder has a secondary nozzle for spraying toward the vibration cylinder.

[0008] A further technical solution is that an isolation device is arranged in the mixing chamber, the isolation device divides the mixing chamber into a gas chamber and a liquid chamber, the gas chamber is connected to the gas injector, the liquid chamber is connected to the liquid injector, the top of the isolation device has an annular portion, the annular portion has a first annular cavity, the first annular cavity has a first port connected to the liquid cavity, the middle of the annular portion has a circular groove, the side wall of the circular groove has a second port connected to the first annular cavity, the central rotating cylinder rotates in the circular groove and the side wall has a third port that can be aligned with the second port.

[0009] According to a further technical solution, the liquid outlet is a slender slit extending along the axis of the central rotating cylinder, and a plurality of the slender slits are longitudinally spaced apart along the axis of the central rotating cylinder.

[0010] A further technical solution is that the jet sleeve includes an outer cylinder and an inner cylinder, a second annular cavity is formed between the outer cylinder and the inner cylinder, a high-pressure channel connected to the gas cavity is provided on the outer cylinder, the inner cylinder includes a plurality of circumferentially distributed arc plates, a gap for gas passing through is formed between two adjacent arc plates, the gap for gas passing through is the water vapor nozzle, the elastic baffle is arranged on the side of the arc plate, the elastic baffle elastically presses against the inner wall of the adjacent arc plate, and a gas guide groove is provided on the side of the elastic baffle facing the adjacent arc plate.

[0011] According to a further technical solution, the gas guide groove guides the high-pressure gas in the gas chamber to enter the inner cylinder in a counterclockwise rotation direction, and the central rotating cylinder sprays crude dicyclopentadiene outward in a clockwise rotation direction; or, the gas guide groove guides the high-pressure gas in the gas chamber to enter the inner cylinder in a clockwise rotation direction, and the central rotating cylinder sprays crude dicyclopentadiene outward in a counterclockwise rotation direction.

[0012] A further technical solution is that a piston portion is slidably arranged in the central rotating cylinder, an elastic reset body is arranged between the piston portion and the bottom of the central rotating cylinder, the inner cavity of the central rotating cylinder is connected to the secondary jet cylinder, and a one-way shielding spring is arranged on the secondary jet cylinder, and the one-way shielding spring shields the secondary nozzle.

[0013] A further technical solution is that the guide tube is provided with circumferentially spaced longitudinal grooves, the high-frequency vibration generator includes an arc-shaped piezoelectric vibration piece and a power supply unit, a vibration gap is formed between the outer surface of the guide tube and the inner wall of the mixing chamber, the piezoelectric vibration piece is arranged in the vibration gap, and the piezoelectric vibration piece is wrapped around the outer wall of the guide tube.

[0014] According to a further technical solution, a support member is further provided in the mixing chamber, and the support member separates the mixing chamber into a high-pressure chamber and a low-pressure chamber from top to bottom. Two longitudinally spaced first sealing pads and a second sealing pad are provided on the support member, and the support member is partially recessed between the first sealing pad and the second sealing pad to form a medium-pressure chamber. The second sealing pad can open the passage between the medium-pressure chamber and the low-pressure chamber when subjected to a large pressure difference.

[0015] According to a further technical solution, a driving motor is also provided at the upper end of the mixing feeding device, and the mixing feeding device is provided with a protective chamber located at the upper part of the mixing chamber, a driving shaft is rotatably arranged in the protective chamber, the lower end of the driving shaft is fixedly connected to the central rotating cylinder, and the shaft of the driving motor is connected to the driving shaft.

[0016] According to a further technical solution, the liquid syringe and the gas syringe have the same structure and both include a syringe barrel, an injection piston, a servo electric push rod and a flow detector. The injection piston is arranged in the syringe barrel, the servo electric push rod is installed outside the syringe barrel and pushes the injection piston to move, and the flow detector is arranged at the outlet of the syringe barrel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In a feeding device for producing cyclopentadiene of the present invention, a liquid injector, a gas injector, and a mixed feeding device are arranged, and an air jet sleeve and a rotatable central rotating cylinder are arranged in the mixed feeding device. Crude dicyclopentadiene is injected into the mixed feeding device through the liquid injector, and water vapor is injected into the mixed feeding device through the gas injector. The power device drives the central rotating cylinder to rotate at a high speed. Since the central rotating cylinder is in a high-speed rotating process, the ejected crude dicyclopentadiene is a multi-layer liquid in a spiral shape around the central rotating cylinder. The water vapor is ejected at a high speed toward the multi-layer liquid through the water vapor nozzle on the air jet sleeve. The water vapor and the crude dicyclopentadiene collide and mix violently. Since the water vapor sequentially impacts the multi-layer dicyclopentadiene from the outside to the inside, the kinetic energy of the water vapor is fully utilized, so that the water vapor and the dicyclopentadiene are fully mixed. After the dicyclopentadiene and the batching water vapor are fully mixed, they are depolymerized, and the target product cyclopentadiene can be produced in a high-efficiency manner for a long time.

[0019] In a feeding device for producing cyclopentadiene of the present invention, a high-frequency vibration screen cylinder, a guide cylinder, a vibration cylinder and a secondary jet cylinder are also arranged in the mixing feeding device. After the gas-liquid mixture is depolymerized for the first time, it is guided to the side wall of the vibration cylinder under the action of gravity. The high-frequency vibration screen cylinder excites the vibration cylinder to make it vibrate at a high frequency. At this time, high-temperature water vapor is sprayed from the secondary jet cylinder to perform a secondary impact on the liquid attached to the surface of the vibration cylinder. The residual dicyclopentadiene further reacts with the water vapor to depolymerize to generate cyclopentadiene, thereby further improving the utilization rate of dicyclopentadiene and increasing the proportion of cyclopentadiene in the mixture. In a feeding device for producing cyclopentadiene of the present invention, a support is arranged in a mixing chamber, and a first sealing gasket, a second sealing gasket and a medium-pressure chamber are arranged on the support. The support divides the mixing chamber into a high-pressure chamber on the upper side and a low-pressure chamber on the lower side. The product after the reaction enters the low-pressure chamber and is discharged to the outside through a discharge nozzle at the bottom. When the discharge nozzle is closed, the air pressure in the low-pressure chamber increases, the second sealing gasket is deformed to open the passage between the low-pressure chamber and the medium-pressure chamber, and the gas in the low-pressure chamber enters the medium-pressure chamber; when the discharge nozzle is opened, the air pressure in the low-pressure chamber decreases, the second sealing gasket is deformed, and the passage between the low-pressure chamber and the medium-pressure chamber is opened again, and the accumulated high-pressure gas in the medium-pressure chamber is sprayed into the low-pressure chamber, accelerating the speed at which the liquid in the low-pressure chamber flows outward, reducing the risk of the liquid sticking to the inner wall of the low-pressure chamber, thereby reducing the risk of the liquid blocking the discharge nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 yes Figure 1 A front view of

[0022] Figure 3 1 is a schematic diagram of the structure of the mixing and feeding device 12 of the present invention;

[0023] Figure 4 is a longitudinal cross-sectional view of the mixing and feeding device 12 of the present invention;

[0024] Figure 5 yes Figure 4 A schematic diagram of the structure inside the middle mixing chamber 13;

[0025] Figure 6 yes Figure 5 A transverse cross-sectional view of the middle annular portion 27;

[0026] Figure 7 is a schematic diagram of the gas chamber 25 and the liquid chamber 26;

[0027] Figure 8 is a schematic structural diagram of the inner cylinder 34;

[0028] Fig. 9 2 is a schematic diagram of the structure of the vibration cylinder 21 and the secondary jet cylinder 22;

[0029] Fig.10 It is a schematic diagram of the structure of the liquid injector 10 or the gas injector 11 in the present invention.

[0030] Explanation of the reference numerals: 10 liquid syringe, 11 gas syringe, 12 mixing feeding device, 13 mixing chamber, 14 central rotating cylinder, 15 jet sleeve, 16 liquid outlet, 17 water vapor nozzle, 18 elastic shield, 19 high-frequency vibration screen cylinder, 20 guide cylinder, 21 vibration cylinder, 22 secondary jet cylinder, 23 secondary nozzle, 24 isolation device, 25 gas chamber, 26 liquid chamber, 27 annular portion, 28 first annular chamber, 29 first port, 30 circular groove, 31 second port, 32 third port, 33 outer cylinder, 34 inner cylinder, 35 second annular chamber, 36 arc plate, 38 piston portion, 39 elastic reset body, 40 support member, 41 high-pressure chamber, 42 low-pressure chamber, 43 first sealing pad, 44 second sealing pad, 45 medium-pressure chamber, 46 drive motor, 47 protection chamber, 48 drive shaft, 49 injection cylinder, 50 servo electric push rod. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example: Refer to the attached Figure 1 To Attachment Fig.10 A feeding device for producing cyclopentadiene, comprising a liquid injector 10 for injecting crude dicyclopentadiene, a gas injector 11 for injecting water vapor or nitrogen feed gas, and a mixed feeding device 12, wherein the liquid injector 10 and the gas injector 11 are respectively arranged on both sides of the mixed feeding device 12 and connected to the mixed feeding device 12, wherein the middle of the mixed feeding device 12 has a mixing chamber 13 extending up and down, wherein a central rotating cylinder 14 is rotatably arranged in the mixing chamber 13, and a fixed air-jet sleeve 15 is arranged outside the central rotating cylinder, wherein the central rotating cylinder is connected to the liquid injector 10 through a liquid channel, wherein the gas injector 11 is connected to the air-jet sleeve 15 through a gas channel, wherein a liquid outlet 16 is provided on the side wall of the central rotating cylinder, and wherein the air-jet sleeve 15 is provided with a gas outlet 16. 5 has a water vapor nozzle 17 facing the central rotating cylinder, an elastic baffle 18 for shielding the water vapor nozzle 17 is provided on the jet sleeve 15, and the elastic baffle 18 can open the water vapor nozzle 17 under external air pressure, a high-frequency vibration screen cylinder 19 is provided at the lower part of the jet sleeve 15, a high-frequency vibration generator is provided between the jet sleeve 15 and the high-frequency vibration screen cylinder 19, the upper part of the high-frequency vibration screen cylinder 19 is a guide cylinder 20, and the lower part is a vibration cylinder 21 with a plurality of vents, the lower end of the central rotating cylinder 14 is fixedly connected with a secondary jet cylinder 22 arranged in the high-frequency vibration screen cylinder 19, the secondary jet cylinder 22 is connected to the gas injector 11 through a gas pipeline, and the secondary jet cylinder 22 has a secondary nozzle 23 for spraying toward the vibration cylinder 21.

[0035] In this embodiment, crude dicyclopentadiene is injected into the mixing feed device 12 through the liquid injector 10, and water vapor is injected into the mixing feed device 12 through the gas injector 11. The power device drives the central rotating cylinder 14 to rotate at a high speed, and the crude dicyclopentadiene is ejected outward through the liquid outlet 16 of the central rotating cylinder 14. Since the central rotating cylinder 14 is in a high-speed rotation process, the ejected liquid is a multi-layer liquid in a spiral shape around the central rotating cylinder 14. At the same time, water vapor enters the jet sleeve 15 and ejects high-temperature and high-pressure water vapor toward the central rotating cylinder 14 through the water vapor nozzle 17. The water vapor and the spiral multi-layer crude dicyclopentadiene impact each other, and the dicyclopentadiene is mixed with the ingredient water vapor and then depolymerized to produce the target product cyclopentadiene.

[0036] Under the action of gravity, the gas-liquid mixture falls from the gap between the central rotating cylinder 14 and the jet sleeve 15. The guide cylinder 20 guides the liquid downward to the wall of the vibration cylinder 21. The high-frequency vibration generator is started, and the vibration cylinder 21 itself vibrates at a high frequency. The liquid attached to the surface of the vibration cylinder 21 is separated from the vibration cylinder 21 by the vibration. At the same time, the secondary jet cylinder 22 sprays high-temperature water vapor toward the vibration cylinder 21 through the secondary nozzle 23, and the solution is depolymerized again.

[0037] Preferably, an isolation device 24 is provided in the mixing chamber 13, and the isolation device 24 divides the mixing chamber 13 into a gas chamber 25 and a liquid chamber 26, the gas chamber 25 is connected to the gas injector 11, and the liquid chamber 26 is connected to the liquid injector 10, the top of the isolation device 24 has an annular portion 27, the annular portion 27 has a first annular chamber 28, the first annular chamber 28 has a first port 29 connected to the liquid chamber 26, the middle of the annular portion 27 has a circular groove 30, the side wall of the circular groove 30 is provided with a second port 31 connected to the first annular chamber 28, the central rotating cylinder 14 rotates in the circular groove 30 and the side wall is provided with a third port 32 that can be aligned with the second port 31.

[0038] In this embodiment, as the central rotating cylinder 14 rotates in the circular groove 30, the third port 32 of the central rotating cylinder 14 is alternately connected with the second port 31. When the second port 31 is connected with the third port 32, the crude dicyclopentadiene in the liquid cavity 26 enters the first annular cavity 28 through the first port 29, and enters the inner cavity of the central rotating cylinder 14 through the second port 31 and the third port 32.

[0039] Preferably, the liquid outlet 16 is a slender slit extending along the axis of the central rotating cylinder 14 , and a plurality of the slender slits are longitudinally spaced apart along the axis of the central rotating cylinder 14 .

[0040] In this embodiment, crude dicyclopentadiene is sprayed outward through a plurality of slender slits. Since the shape of the liquid outlet 16 is a slender slit, the liquid is sprayed in a ribbon shape. With the high-speed rotation of the central rotating cylinder 14, the liquid forms a ribbon-shaped spiral multi-layer liquid. In addition, since the slender slits are spaced apart longitudinally, the liquid spraying space is increased, which is conducive to forming the sprayed liquid into a multi-layer spiral shape.

[0041] Preferably, the jet sleeve 15 includes an outer cylinder 33 and an inner cylinder 34, a second annular cavity 35 is formed between the outer cylinder 33 and the inner cylinder 34, a high-pressure channel connected to the gas cavity 25 is provided on the outer cylinder 33, the inner cylinder 34 includes a plurality of circumferentially distributed arc plates 36, a gap for gas passage is formed between two adjacent arc plates 36, the gap for gas passage is the water vapor nozzle 17, the elastic baffle 18 is arranged on the side of the arc plate 36, the elastic baffle 18 elastically presses against the inner wall of the adjacent arc plate 36, and a gas guide groove is arranged on the side of the elastic baffle 18 facing the adjacent arc plate 36.

[0042] In this embodiment, the elastic shield 18 is affected by the external air pressure and swings inward, and the elastic shield 18 is separated from the inner wall of the adjacent arc plate 36 to open the water vapor nozzle 17, and the external high-pressure water vapor is sprayed toward the multi-layer spiral dicyclopentadiene through the water vapor nozzle 17. When the external water vapor pressure is not high, the elastic shield 18 does not separate from the inner wall of the arc plate 36, and the water vapor can be sprayed toward the central rotating cylinder 14 through the gas guide groove.

[0043] Preferably, the gas guide groove guides the high-pressure gas in the gas chamber 25 to enter the inner cylinder 34 in a counterclockwise rotation direction, and the central rotating cylinder 14 sprays crude dicyclopentadiene outward in a clockwise rotation direction; or, the gas guide groove guides the high-pressure gas in the gas chamber 25 to enter the inner cylinder 34 in a clockwise rotation direction, and the central rotating cylinder 14 sprays crude dicyclopentadiene outward in a counterclockwise rotation direction.

[0044] In this embodiment, the flow direction of the airflow is opposite to the flow direction of the liquid, and the airflow and the liquid flow and mix relative to each other, and the kinetic energy of the airflow and the liquid is used to fully mix the gas and the liquid.

[0045] Preferably, a piston portion 38 is slidably arranged inside the central rotating cylinder 14, an elastic reset body 39 is arranged between the piston portion 38 and the bottom of the central rotating cylinder 14, the inner cavity of the central rotating cylinder 14 is connected to the secondary jet cylinder 22, and a one-way shielding spring is arranged on the secondary jet cylinder 22, and the one-way shielding spring shields the secondary nozzle 23.

[0046] In this embodiment, whenever the central rotating cylinder 14 rotates to the point where the second port 31 is connected to the third port 32, liquid enters the central rotating cylinder 14, the liquid pushes the piston portion 38 and squeezes the elastic reset body 39, the piston portion 38 squeezes the gas in the secondary jet cylinder 22, the gas pushes the one-way shielding spring, and water vapor is intermittently sprayed toward the vibrating cylinder 21 through the secondary nozzle 23. The water vapor passes through the vent holes on the vibrating cylinder 21, and the water vapor and liquid are further mixed, thereby further depolymerization occurs.

[0047] Preferably, the guide tube 20 is provided with circumferentially spaced longitudinal grooves, the high-frequency vibration generator includes an arc-shaped piezoelectric vibration piece and a power supply unit, a vibration gap is formed between the outer surface of the guide tube 20 and the inner wall of the mixing chamber 13, the piezoelectric vibration piece is arranged in the vibration gap, and the piezoelectric vibration piece is wrapped around the outer wall of the guide tube 20.

[0048] In this embodiment, the power supply unit drives the piezoelectric vibration piece to vibrate at a high frequency, and the high frequency vibration is transmitted to the guide tube 20 , and the guide tube 20 transmits the vibration to the vibration tube 21 .

[0049] Preferably, a support member 40 is further provided in the mixing chamber 13, and the support member 40 divides the mixing chamber 13 into a high-pressure chamber 41 and a low-pressure chamber 42 at the upper and lower parts. Two longitudinally spaced first sealing gaskets 43 and second sealing gaskets 44 are provided on the support member 40. The support member 40 is partially concave between the first sealing gasket 43 and the second sealing gasket 44 to form a medium-pressure chamber 45. The second sealing gasket 44 can open the passage between the medium-pressure chamber 45 and the low-pressure chamber 42 under a large pressure difference.

[0050] In this embodiment, the bottom of the low-pressure chamber 42 is provided with a discharge nozzle. When the discharge nozzle is closed, the air pressure in the low-pressure chamber 42 increases. When the air pressure in the low-pressure chamber 42 is higher than that in the medium-pressure chamber 45, the second sealing gasket 44 is deformed to open the passage between the low-pressure chamber 42 and the medium-pressure chamber 45. The gas in the low-pressure chamber 42 enters the medium-pressure chamber 45 under the action of high pressure. When the discharge nozzle is opened, the air pressure in the low-pressure chamber 42 decreases, and the air pressure in the medium-pressure chamber 45 increases. The second sealing gasket 44 is deformed to open the passage between the low-pressure chamber 42 and the medium-pressure chamber 45 again. The accumulated high-pressure gas in the medium-pressure chamber 45 is sprayed into the low-pressure chamber 42, accelerating the speed at which the liquid in the low-pressure chamber 42 flows out, reducing the risk of the liquid sticking to the inner wall of the low-pressure chamber 42 due to its own viscosity, thereby reducing the risk of the liquid blocking the discharge nozzle.

[0051] Preferably, a driving motor 46 is also provided at the upper end of the mixing feeding device 12. The mixing feeding device 12 is located at the upper part of the mixing chamber 13 and has a protective chamber 47. A driving shaft 48 is rotatably arranged in the protective chamber 47. The lower end of the driving shaft 48 is fixedly connected to the central rotating cylinder 14, and the shaft of the driving motor 46 is connected to the driving shaft 48.

[0052] In this embodiment, the driving motor 46 is started to drive the driving shaft 48 and the central rotating cylinder 14 to rotate at high speed.

[0053] Preferably, the liquid syringe 10 and the gas syringe 11 have the same structure and both include a syringe barrel 49, an injection piston, a servo electric push rod 50 and a flow detector. The injection piston is arranged in the syringe barrel 49, the servo electric push rod 50 is installed outside the syringe barrel 49 and pushes the injection piston to move, and the flow detector is arranged at the outlet of the syringe barrel 49.

[0054] In this embodiment, the flow detector is used to detect the flow at the outlet of the syringe 49, and the ratio of the liquid syringe 10 and the gas syringe 11 is controlled by controlling the extension and contraction amount of the servo electric push rod 50.

[0055] The working process of the present invention is:

[0056] First, crude dicyclopentadiene is injected into the mixing feed device 12 through the liquid injector 10, and water vapor is injected into the mixing feed device 12 through the gas injector 11. The driving motor 46 drives the central rotating cylinder 14 to rotate at a high speed, and the crude dicyclopentadiene is ejected outward through the liquid outlet 16 of the central rotating cylinder 14. Since the central rotating cylinder 14 is in a high-speed rotation process, the ejected liquid is a multi-layer liquid in a spiral shape around the central rotating cylinder 14. At the same time, water vapor enters the jet sleeve 15 and ejects high-temperature and high-pressure water vapor toward the central rotating cylinder 14 through the water vapor nozzle 17. The water vapor and the spiral multi-layer crude dicyclopentadiene impact each other, and the dicyclopentadiene is mixed with the ingredient water vapor and then depolymerized to produce the target product cyclopentadiene.

[0057] Second, after the above process, the gas-liquid mixture falls from the gap between the central rotating cylinder 14 and the jet sleeve 15 under the action of gravity, and the guide cylinder 20 guides the liquid downward to the wall of the vibration cylinder 21. The high-frequency vibration generator is started, and the vibration cylinder 21 itself vibrates at a high frequency. The liquid attached to the surface of the vibration cylinder 21 is separated from the vibration cylinder 21 by the vibration. At the same time, the secondary jet cylinder 22 sprays high-temperature water vapor toward the vibration cylinder 21 through the secondary nozzle 23, and the residual dicyclopentadiene in the solution is depolymerized again.

[0058] Third, the product after the above reaction enters the low-pressure chamber 42 and is discharged to the outside through the discharge nozzle at the bottom. When the discharge nozzle is closed, the air pressure in the low-pressure chamber 42 increases. When the air pressure in the low-pressure chamber 42 is higher than that in the medium-pressure chamber 45, the second sealing gasket 44 is deformed to open the passage between the low-pressure chamber 42 and the medium-pressure chamber 45. The gas in the low-pressure chamber 42 enters the medium-pressure chamber 45 under the action of high pressure. When the discharge nozzle is opened, the air pressure in the low-pressure chamber 42 decreases, and the air pressure in the medium-pressure chamber 45 increases. The second sealing gasket 44 is deformed to open the passage between the low-pressure chamber 42 and the medium-pressure chamber 45 again. The accumulated high-pressure gas in the medium-pressure chamber 45 is sprayed into the low-pressure chamber 42, accelerating the speed at which the liquid in the low-pressure chamber 42 flows outward, reducing the risk of the liquid sticking to the inner wall of the low-pressure chamber 42 due to its own viscosity, thereby reducing the risk of the liquid blocking the discharge nozzle. The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A feeding device for producing cyclopentadiene, comprising a liquid injector for injecting crude dicyclopentadiene, a gas injector for injecting water vapor or nitrogen batching gas, and a mixing feeding device, characterized in that: The liquid injector and the gas injector are respectively arranged on both sides of the mixing feeding device and connected to the mixing feeding device. A mixing chamber extending up and down is provided in the middle of the mixing feeding device. A central rotating cylinder is rotatably arranged in the mixing chamber, and a fixed jet sleeve is arranged outside the central rotating cylinder. The central rotating cylinder is connected to the liquid injector through a liquid channel, and the gas injector is connected to the jet sleeve through a gas channel. A liquid outlet is provided on the side wall of the central rotating cylinder, and the inner wall of the jet sleeve has a water vapor nozzle facing the central rotating cylinder. An elastic shielding plate for shielding the water vapor nozzle is provided on the jet sleeve, and the elastic shielding plate can open the water vapor nozzle under external air pressure. A high-frequency vibration screen cylinder is arranged at the lower part of the jet sleeve, a high-frequency vibration generator is arranged between the jet sleeve and the high-frequency vibration screen cylinder, the upper part of the high-frequency vibration screen cylinder is a guide cylinder, and the lower part is a vibration cylinder with a plurality of vents, the lower end of the central rotating cylinder is fixedly connected with a secondary jet cylinder arranged in the high-frequency vibration screen cylinder, the secondary jet cylinder is connected to the gas injector through a gas pipeline, and the secondary jet cylinder has a secondary nozzle for spraying toward the vibration cylinder; an isolation device is arranged in the mixing chamber, the isolation device separates the mixing chamber into a gas chamber and a liquid chamber, the gas chamber is connected to the gas injector, and the liquid chamber is connected to the liquid injector, the top of the isolation device has an annular portion, and the annular portion has a first annular cavity, wherein the first annular cavity has a first port connected to the liquid cavity, a circular groove is provided in the middle of the annular portion, a second port connected to the first annular cavity is provided on the side wall of the circular groove, the central rotating cylinder rotates in the circular groove and a third port that can be aligned with the second port is provided on the side wall; the jet sleeve comprises an outer cylinder and an inner cylinder, a second annular cavity is formed between the outer cylinder and the inner cylinder, a high-pressure channel connected to the gas cavity is provided on the outer cylinder, the inner cylinder comprises a plurality of circumferentially distributed arc plates, a gap for gas to pass through is formed between two adjacent arc plates, the gap for gas to pass through is the water vapor nozzle, and the elastic shield is provided on the side of the arc plate, and the elastic shield elastically presses against the adjacent The inner wall of the arc plate, and the side of the elastic shielding plate facing the adjacent arc plate are provided with a gas guide groove; a piston part is slidably arranged in the central rotating cylinder, an elastic reset body is arranged between the piston part and the bottom of the central rotating cylinder, the inner cavity of the central rotating cylinder is connected with the secondary jet cylinder, and a one-way shielding spring is arranged on the secondary jet cylinder, and the one-way shielding spring shields the secondary nozzle; the guide cylinder is provided with circumferentially spaced longitudinal grooves, the high-frequency vibration generator includes an arc-shaped piezoelectric vibration piece and a power supply part, a vibration gap is formed between the outer surface of the guide cylinder and the inner wall of the mixing chamber, the piezoelectric vibration piece is arranged in the vibration gap, and the piezoelectric vibration piece is wrapped around the outer wall of the guide cylinder;The liquid injector and the gas injector have the same structure, both of which include an injection barrel, an injection piston, a servo electric push rod and a flow detector. The injection piston is arranged in the injection barrel, the servo electric push rod is installed outside the injection barrel and pushes the injection piston to move, and the flow detector is arranged at the outlet of the injection barrel. ; 2. A feeding device for producing cyclopentadiene according to claim 1, characterized in that : The gas guide groove guides the high-pressure gas in the gas chamber to enter the inner cylinder in a counterclockwise rotation direction, and the central rotating cylinder sprays crude dicyclopentadiene outward in a clockwise rotation direction; Alternatively, the gas guide groove guides the high-pressure gas in the gas chamber to enter the inner cylinder in a clockwise rotation direction, and the central rotating cylinder sprays crude dicyclopentadiene outward in a counterclockwise rotation direction.

3. A feeding device for producing cyclopentadiene according to claim 1, characterized in that: The liquid outlet is a slender slit extending along the axis of the central rotating cylinder. Along the axis of the central rotating cylinder, a plurality of the slender slits are longitudinally spaced and distributed.

4. A feeding device for producing cyclopentadiene according to claim 1, characterized in that : A support member is also provided in the mixing chamber, and the support member divides the mixing chamber into a high-pressure chamber and a low-pressure chamber from top to bottom. Two longitudinally spaced first sealing pads and a second sealing pad are provided on the support member. The support member is partially recessed between the first sealing pad and the second sealing pad to form a medium-pressure chamber. The second sealing pad can open the channel between the medium-pressure chamber and the low-pressure chamber when subjected to a large pressure difference.

5. A feeding device for producing cyclopentadiene according to claim 1, characterized in that : A driving motor is also provided at the upper end of the mixing feeding device. The mixing feeding device is located at the upper part of the mixing chamber and has a protective chamber. A driving shaft is rotatably arranged in the protective chamber. The lower end of the driving shaft is fixedly connected to the central rotating cylinder, and the shaft of the driving motor is connected to the driving shaft.

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