High-efficiency heat exchange reaction device for furfural production

Abstract

This invention discloses a high-efficiency heat exchange reaction device for furfural production, relating to the field of furfural production technology. It includes a base plate with a support frame snapped onto its top. A heat exchange reaction and conveying separation mechanism is installed at the top of the support frame, comprising a horizontal hydrolysis reaction cylinder. The horizontal hydrolysis reaction cylinder is mounted on the top of the support frame, and a hollow rotating rod is connected inside the horizontal hydrolysis reaction cylinder. This invention has a scientifically sound and reasonable structure, is safe and convenient to use, and features a heat exchange reaction and conveying separation mechanism. Through the coordinated operation of the horizontal hydrolysis reaction cylinder and the vertical stripping reaction cylinder, a continuous process chain of "horizontal main reaction and vertical deep stripping" is formed. The spiral pusher blades achieve forced and stable conveying of solid materials, facilitating precise control of the reaction residence time. Furthermore, the vertical spiral feeder auger, in conjunction with counter-current steam, maximizes the stripping recovery of residual furfural.

Description

Technical Field

[0001] This invention relates to the field of furfural production technology, specifically to a high-efficiency heat exchange reaction device for furfural production. Background Technology

[0002] Furfural, the same substance as furfural, was originally produced by heating rice bran with dilute acid, hence the name furfural. Furfural is formed by the hydrolysis of pentosans to pentoses under acid, followed by the dehydration and cyclization of pentoses. The main raw materials for its production are agricultural by-products such as corn cobs. For example, a waste gas heat exchange device for furfural production, application number CN202221455928.5, is disclosed. This patent uses a steam compressor module to heat the steam after heat exchange, and then transports it to designated equipment for sale through a second steam outlet pipe, thereby improving the resource utilization rate of this structure during use. However, during production, the reaction between steam and materials is not sufficient, leaving furfural residues in the materials and causing waste. Furthermore, it is inconvenient to separate solids, liquids, and vapors during the reaction, affecting the reaction and production efficiency. Therefore, to avoid these technical problems, it is indeed necessary to provide a high-efficiency heat exchange reaction device for furfural production to overcome the defects in the existing technology. Summary of the Invention

[0003] This invention provides a high-efficiency heat exchange reaction device for furfural production, which can effectively solve the problems mentioned in the background art, such as insufficient reaction between steam and materials, resulting in residual furfural in the materials and waste, and the inconvenience of separating solid, liquid and vapor during the reaction process, which affects the reaction and production efficiency.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency heat exchange reaction device for furfural production, comprising a base plate, a support frame snapped onto the top of the base plate, and a heat exchange reaction and conveying separation mechanism provided at the top of the support frame, the heat exchange reaction and conveying separation mechanism comprising a horizontal hydrolysis reaction cylinder; A horizontal hydrolysis reaction cylinder is installed at the top of the support frame. A hollow rotating rod is connected inside the horizontal hydrolysis reaction cylinder, and a spiral pusher blade is sleeved on the outside of the hollow rotating rod. The top of the support frame is fitted with a transverse pusher motor, and transmission gears are sleeved on the outer side of the output shaft of the transverse pusher motor and the outer side of the hollow rotating rod. The horizontal hydrolysis reaction cylinder is fitted with a liquid collection jacket on the outside, and the horizontal hydrolysis reaction cylinder is symmetrically fitted with separation filter plates inside. The top of the support frame is fitted with a transfer hopper, the top of the transfer hopper is fitted with an air collecting cylinder, the top of the air collecting cylinder is fitted with a uniform speed feeding motor, and the bottom of the output shaft of the uniform speed feeding motor is fitted with a stirring rod. The bottom of the transfer hopper is clamped to a vertical stripping reactor, and the bottom of the vertical stripping reactor is clamped to a slag discharge cylinder.

[0005] According to the above technical solution, both the transverse pushing motor and the uniform speed feeding motor are powered by an external power source. The inner diameter of the separation filter plate is equal to the inner diameter of the horizontal hydrolysis reaction cylinder, and the length of the separation filter plate is less than the length of the liquid collection jacket. One end of the transverse pushing motor is connected to one end of the transfer hopper.

[0006] According to the above technical solution, a jacket drain pipe is clamped to one side of the bottom end of the liquid collecting jacket, a horizontal hydrolysis exhaust pipe is clamped to the top end of the liquid collecting jacket, a vertical stripping exhaust pipe is clamped to the outside of the gas collecting cylinder, and an aldehyde vapor collection manifold is clamped to one adjacent end of the horizontal hydrolysis exhaust pipe and the vertical stripping exhaust pipe. An aldehyde vapor exhaust fan is installed on the outside of the aldehyde vapor collection manifold, and a distillation vertical cylinder is clamped to one end of the aldehyde vapor collection manifold. The inner wall of the slag discharge cylinder is fitted with a liquid collection hopper, and the bottom end of the liquid collection hopper is fitted with a waste discharge pipe. The inner wall of the liquid collection hopper is fitted with a cross support frame. The top of the cross support frame is rotatably connected to a vertical screw feeder. The top of the cross support frame is fitted with a filtrate permeation plate corresponding to the outer side of the vertical screw feeder shaft. The top of the inner wall of the vertical stripping reaction cylinder is fitted with a shaft anti-deviation frame corresponding to the outer side of the vertical screw feeder shaft. Both the horizontal hydrolysis reactor and the vertical stripping reactor are fixedly fitted with annular steam distribution rings on their outer sides. Steam distribution branch pipes are symmetrically snapped into the inner wall of the annular steam distribution rings. A steam input pipe is snapped into one end of the annular steam distribution rings, and a raw material feed hopper is installed on the top of the horizontal hydrolysis reactor on the side corresponding to the annular steam distribution ring.

[0007] According to the above technical solution, the bottom end of the jacketed drain pipe passes through the top end of the support frame, the aldehyde vapor exhaust fan is powered by an external power source, and one end of the waste discharge pipe passes through one end of the slag discharge cylinder.

[0008] According to the above technical solution, both the spiral pusher blades and the vertical spiral feeder are provided with mesh holes. The outer side of the vertical spiral feeder is in contact with the inner wall of the vertical stripping reaction cylinder, and the top of the vertical spiral feeder shaft is engaged with the bottom of the stirring rod.

[0009] According to the above technical solution, the outer diameter of the filtrate permeation plate is larger than the inner diameter of the vertical stripping reaction cylinder, the inner wall of the shaft anti-deviation frame is rotatably connected to the outer side of the vertical screw feeder shaft, and a grid filter screen is clamped inside the steam distribution branch pipe.

[0010] According to the above technical solution, a waste liquid treatment and circulation mechanism is provided at the top of the base plate, and the waste liquid treatment and circulation mechanism includes an equipment mounting frame; The top of the base plate is fitted with an equipment mounting bracket, and a coarse filter cylinder is fitted inside one side of the equipment mounting bracket, with a filter screen cylinder installed inside the coarse filter cylinder. An ultrafiltration membrane cartridge is installed on the other side of the equipment mounting frame, and multiple acid-resistant nanofiltration membranes are installed inside the ultrafiltration membrane cartridge. Interstage connecting pipes are snapped onto the outside of the multiple acid-resistant nanofiltration membranes. The bottom outer end of the filter screen cylinder is connected to a waste liquid recovery main pipe, and a liquid supply booster pump is installed on the outside of the waste liquid recovery main pipe. The top of the ultrafiltration membrane cartridge is fitted with a concentrated acid suction tube, one end of which is fitted with an acid spray distribution tube, and atomizing nozzles are fitted at equal intervals on the outside of the acid spray distribution tube. A clean wastewater discharge pipe is snapped onto the top of the outer side of the ultrafiltration membrane cartridge; The bottom end of the liquid collection jacket is equidistantly clamped with a bottom steam supply pipe, the top end of the bottom steam supply pipe is clamped with an anti-backflow cover plate, the bottom end of the bottom steam supply pipe is clamped with a steam distribution main pipe, hollow shaft steam supply elbows are symmetrically clamped on the outside of the steam distribution main pipe, and a hollow shaft rotary joint is clamped on one adjacent end of each of the two hollow shaft steam supply elbows. The other end of the horizontal hydrolysis reaction cylinder is clamped with an L-shaped support plate, and a waste heat steam guide sleeve is clamped inside the equipment mounting frame. A waste heat recovery input pipe is clamped at the top of the waste heat steam guide sleeve.

[0011] According to the above technical solution, the other end of the interstage connecting pipe is connected to the top of the outer side of the coarse filter cartridge, the bottom end of the jacketed drain pipe is connected to the top of the waste liquid recovery main pipe, one end of the waste discharge pipe is connected to one end of the waste liquid recovery main pipe, and the liquid supply booster pump is powered by an external power source.

[0012] According to the above technical solution, the height of the top of the bottom steam replenishment pipe is greater than the height of the jacketed drain pipe, there is a gap between the anti-backflow cover and the bottom steam replenishment pipe, and the outer diameter of the anti-backflow cover is greater than the outer diameter of the bottom steam replenishment pipe.

[0013] According to the above technical solution, one end of the atomizing nozzle penetrates the top of the liquid collecting jacket, one end of the hollow shaft rotary joint and one end of the waste heat steam guide sleeve are respectively rotatably connected to one end of the hollow rotating rod, and one end of the waste heat recovery input pipe is connected to one end of the raw material feed hopper.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use. 1. A heat exchange reaction and conveying separation mechanism is set up. Through the coordinated operation of the horizontal hydrolysis reaction tank and the vertical stripping reaction tank, a continuous process chain of "horizontal main reaction and vertical deep stripping" is formed. The spiral pusher blades are used to achieve forced and stable conveying of solid materials, which facilitates precise control of reaction residence time. The vertical spiral feed auger and counter-current steam are used to maximize the stripping and recovery of residual furfural. The combination of the two achieves continuous slag discharge of solid materials at atmospheric pressure, which improves furfural production efficiency and production continuity. By combining the liquid collection jacket with the separation filter plate, the liquid generated during the reaction inside the horizontal hydrolysis reaction cylinder is discharged in time through the jacket drain pipe to prevent the liquid from accumulating in the reaction zone and affecting heat transfer and reaction balance. Meanwhile, some aldehyde vapor passes through the separation filter plate above and is discharged through the horizontal hydrolysis exhaust pipe, thus realizing simultaneous reaction and separation and improving the efficiency of furfural production. By combining the slag discharge cylinder, the shaft anti-deviation frame, the filtrate permeation plate, and the liquid collection hopper, solid-liquid-vapor separation is achieved inside the vertical stripping reactor. Solid residue is discharged through the slag discharge cylinder, while waste liquid is discharged through the liquid collection hopper and waste discharge pipe after filtration. Steam and aldehyde vapor rise and are discharged through the gas collection cylinder and the vertical stripping exhaust pipe. The aldehyde vapor is then transported and purified through the combination of the aldehyde vapor collection manifold, the aldehyde vapor exhaust fan, and the distillation vertical cylinder, thus realizing the production of furfural.

[0015] 2. A waste liquid treatment and circulation mechanism is set up. Through the cooperation of coarse filter cylinder, filter screen cylinder, ultrafiltration membrane cylinder, multi-layer acid-resistant nanofiltration membrane and inter-stage connecting pipe, two filtrations are carried out to separate dilute sulfuric acid and water in the waste liquid. The separated dilute sulfuric acid is sprayed back into the collection jacket through the cooperation of concentrated acid suction pipe, acid spray distribution pipe and atomizing nozzle, and then returned to the horizontal hydrolysis reaction cylinder through the separation filter plate. This realizes the internal circulation and replenishment of acid, stabilizes the acid concentration of the reaction system, greatly reduces sulfuric acid consumption, and ensures the reaction effect. The combination of bottom steam supply pipe, anti-backflow cover plate and steam diversion main pipe facilitates the delivery of high-temperature steam from the bottom of the liquid collection jacket into the interior of the horizontal hydrolysis reaction cylinder. This not only provides a heat source for the interior of the horizontal hydrolysis reaction cylinder, but also plays a stripping role, carrying the generated furfural through the separation filter plate and then discharging it through the horizontal hydrolysis exhaust pipe, thus improving the efficiency and convenience of furfural production. High-temperature steam is introduced into the hollow shaft rotary joint through the hollow shaft steam supply bend, flowing counter-currently along the inside of the hollow rotating rod to form counter-current heat exchange with the solid material, further enhancing heat transfer efficiency and increasing furfural yield. The steam after heat exchange is preheated in the raw material feed hopper through the waste heat recovery input pipe, improving resource utilization. The clean water after membrane filtration can be used as a heat source through the clean wastewater discharge pipe, further improving resource utilization.

[0016] In summary, the combination of heat exchange reaction and conveying separation mechanisms with waste liquid treatment and circulation mechanisms forms a continuous production line for raw material hydrolysis, aldehyde vapor collection, and acid liquid reuse. The combination of the horizontal hydrolysis reactor and the vertical stripping reactor enables continuous conveying and reaction of solid materials, as well as solid-liquid separation. Simultaneously, the bottom steam injection pipe and atomizing nozzles work together to promptly replenish the heat source and acidic reactant into the horizontal hydrolysis reactor, ensuring the continuous production of furfural. Then, the vertical stripping reactor performs a countercurrent heating reaction to carry out a secondary reaction on the solid materials, extracting the residual furfural and further improving the production efficiency. At the same time, it makes efficient use of heat and reduces energy waste. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the separation filter plate of the present invention; Figure 3 This is a schematic diagram of the installation structure of the liquid collecting hopper of the present invention; Figure 4 This is a schematic diagram of the heat exchange reaction and transport separation mechanism of the present invention; Figure 5 This is a schematic diagram of the installation structure of the coarse filter cartridge of the present invention; Figure 6 This is a schematic diagram of the waste liquid treatment and recycling mechanism of the present invention; Figure 7 This is a schematic diagram of the installation structure of the multilayer acid-resistant nanofiltration membrane of the present invention; Figure 8 This is a schematic diagram of the installation structure of the waste heat steam guide sleeve of the present invention.

[0019] The diagram labels are: 1. Base plate; 2. Support frame; 3. Heat exchange reaction and conveying separation mechanism; 301. Horizontal hydrolysis reaction cylinder; 302. Transmission gear; 303. Horizontal pusher motor; 304. Hollow rotating rod; 305. Spiral pusher blade; 306. Liquid collection jacket; 307. Separation filter plate; 308. Transfer hopper; 309. Gas collection cylinder; 310. Uniform speed feeding motor; 311. Stirring rotating rod; 312. Vertical stripping reaction cylinder; 313. Slag discharge cylinder; 314. Jacketed drain pipe; 31 5. Horizontal hydrolysis exhaust pipe; 316. Vertical stripping exhaust pipe; 317. Aldehyde vapor collection manifold; 318. Aldehyde vapor exhaust fan; 319. Vertical screw feeder; 320. Liquid collection hopper; 321. Waste discharge pipe; 322. Cross support frame; 323. Filtrate permeation plate; 324. Shaft anti-deviation frame; 325. Annular steam distribution ring; 326. Steam distribution branch pipe; 327. Steam input pipe; 328. Raw material feed hopper; 329. Distillation vertical cylinder; 4. Waste liquid treatment and circulation mechanism; 401. Equipment mounting frame; 402. Coarse filter cartridge; 403. Filter screen cartridge; 404. Ultrafiltration membrane cartridge; 405. Multilayer acid-resistant nanofiltration membrane; 406. Interstage connecting pipe; 407. Waste liquid recovery main pipe; 408. Liquid supply booster pump; 409. Concentrated acid suction pipe; 410. Waste heat recovery input pipe; 411. Acid spray distribution pipe; 412. Atomizing nozzle; 413. Clean wastewater discharge pipe; 414. Bottom steam supply pipe; 415. Anti-backflow cover plate; 416. Steam diversion main pipe; 417. Hollow shaft steam supply elbow; 418. Hollow shaft rotary joint; 419. L-shaped support plate; 420. Waste heat steam guide sleeve. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] Example: Figure 1-8 As shown, the present invention provides a technical solution, a high-efficiency heat exchange reaction device for furfural production, including a base plate 1, a support frame 2 snapped onto the top of the base plate 1, and a heat exchange reaction and conveying separation mechanism 3 provided at the top of the support frame 2. The heat exchange reaction and conveying separation mechanism 3 includes a horizontal hydrolysis reaction cylinder 301, a transmission gear 302, a transverse pusher motor 303, a hollow rotating rod 304, a spiral pusher blade 305, a liquid collection jacket 306, a separation filter plate 307, a transfer hopper 308, a gas collection cylinder 309, a uniform speed feeding motor 310, a stirring rotating rod 311, a vertical stripping reaction cylinder 312, a slag discharge cylinder 313, and a jacketed liquid discharge pipe. 314. Horizontal hydrolysis exhaust pipe; 315. Vertical stripping exhaust pipe; 316. Aldehyde vapor collection manifold; 317. Aldehyde vapor exhaust fan; 318. Vertical screw feeder; 319. Liquid collection hopper; 320. Waste discharge pipe; 321. Cross support frame; 322. Filtrate permeation plate; 323. Shaft anti-deviation frame; 324. Annular steam distribution ring; 325. Steam distribution branch pipe; 326. Steam input pipe; 327. Raw material feed hopper; 328. Distillation vertical cylinder; 329. A horizontal hydrolysis reaction cylinder 301 is installed at the top of the support frame 2. A hollow rotating rod 304 is connected inside the horizontal hydrolysis reaction cylinder 301, and a spiral pusher blade 305 is sleeved on the outside of the hollow rotating rod 304. A transverse pusher motor 303 is snapped onto the top of the support frame 2. Transmission gears 302 are sleeved on the outer side of the output shaft of the transverse pusher motor 303 and the outer side of the hollow rotating rod 304. A liquid collection jacket 306 is sleeved on the outside of the horizontal hydrolysis reaction cylinder 301, and separation filter plates 307 are symmetrically snapped into the inside of the horizontal hydrolysis reaction cylinder 301. The top of the support frame 2 is fitted with a transfer hopper 308, the top of the transfer hopper 308 is fitted with an air collecting cylinder 309, the top of the air collecting cylinder 309 is fitted with a uniform speed feeding motor 310, and the bottom of the output shaft of the uniform speed feeding motor 310 is fitted with a stirring rod 311. The bottom of the transfer hopper 308 is clamped to a vertical stripping reactor 312, and the bottom of the vertical stripping reactor 312 is clamped to a slag discharge cylinder 313.

[0022] Both the horizontal pusher motor 303 and the uniform speed feeding motor 310 are powered by an external power source. The inner diameter of the separation filter plate 307 is equal to the inner diameter of the horizontal hydrolysis reaction cylinder 301, and the length of the separation filter plate 307 is less than the length of the liquid collection jacket 306. One end of the horizontal pusher motor 303 is connected to one end of the transfer hopper 308.

[0023] A jacket drain pipe 314 is snapped onto one side of the bottom end of the liquid collecting jacket 306, a horizontal hydrolysis exhaust pipe 315 is snapped onto the top end of the liquid collecting jacket 306, a vertical stripping exhaust pipe 316 is snapped onto the outside of the gas collecting cylinder 309, and an aldehyde vapor collection manifold 317 is snapped onto the adjacent end of the horizontal hydrolysis exhaust pipe 315 and the vertical stripping exhaust pipe 316. An aldehyde vapor exhaust fan 318 is installed on the outside of the aldehyde vapor collection manifold 317, and a distillation vertical cylinder 329 is snapped onto one end of the aldehyde vapor collection manifold 317. A liquid collecting hopper 320 is clamped to the inner wall of the slag discharge cylinder 313, and a waste discharge pipe 321 is clamped to the bottom of the liquid collecting hopper 320. In order to discharge waste liquid, the bottom end of the jacketed drain pipe 314 passes through the top end of the support frame 2. The aldehyde vapor exhaust fan 318 is powered by an external power source. One end of the waste discharge pipe 321 passes through one end of the slag discharge cylinder 313. A cross support frame 322 is clamped to the inner wall of the liquid collecting hopper 320. A vertical screw feed auger 319 is rotatably connected to the top end of the cross support frame 322. In order to ensure steam circulation, mesh holes are opened inside the screw pusher blades 305 and the vertical screw feed auger 319. The outer side of the vertical screw feed auger 319 is connected to the vertical stripping reaction cylinder. The inner walls of 312 are fitted together, and the top of the vertical screw feeder auger 319 is engaged with the bottom of the stirring rod 311. The top of the cross support 322 is equipped with a filtrate permeation plate 323 corresponding to the outer side of the vertical screw feeder auger 319. The top of the inner wall of the vertical stripping reactor 312 is engaged with a shaft anti-deviation frame 324 corresponding to the outer side of the vertical screw feeder auger 319. In order to separate solid and liquid, the outer diameter of the filtrate permeation plate 323 is larger than the inner diameter of the vertical stripping reactor 312. The inner wall of the shaft anti-deviation frame 324 is rotatably connected to the outer side of the vertical screw feeder auger 319. A grid filter screen is engaged inside the steam distribution branch pipe 326. Both the horizontal hydrolysis reactor 301 and the vertical stripping reactor 312 are fixedly sleeved with annular steam distribution rings 325. Steam distribution branch pipes 326 are symmetrically clamped to the inner wall of the annular steam distribution ring 325. A steam input pipe 327 is clamped to one end of the annular steam distribution ring 325. A raw material feed hopper 328 is installed on the top of the horizontal hydrolysis reactor 301 on one side corresponding to the annular steam distribution ring 325. A waste liquid treatment and circulation mechanism 4 is provided at the top of the base plate 1; The waste liquid treatment and circulation mechanism 4 includes an equipment mounting frame 401, a coarse filter cartridge 402, a filter screen cartridge 403, an ultrafiltration membrane cartridge 404, a multi-layer acid-resistant nanofiltration membrane 405, an interstage connecting pipe 406, a waste liquid recovery main pipe 407, a liquid supply booster pump 408, a concentrated acid suction pipe 409, a waste heat recovery input pipe 410, an acid spray distribution pipe 411, an atomizing nozzle 412, a clean wastewater discharge pipe 413, a bottom steam supply pipe 414, a backflow prevention cover plate 415, a steam diversion main pipe 416, a hollow shaft steam supply bend 417, a hollow shaft rotary joint 418, an L-shaped support plate 419, and a waste heat steam guide sleeve 420. The top of the base plate 1 is fitted with an equipment mounting bracket 401, and a coarse filter cylinder 402 is fitted inside one side of the equipment mounting bracket 401. A filter screen cylinder 403 is installed inside the coarse filter cylinder 402. An ultrafiltration membrane cartridge 404 is installed on the other side of the equipment mounting frame 401, and a multi-layer acid-resistant nanofiltration membrane 405 is installed inside the ultrafiltration membrane cartridge 404. An interstage connecting pipe 406 is snapped onto the outside of the multi-layer acid-resistant nanofiltration membrane 405. The bottom of the outer side of the filter cylinder 403 is clamped to the waste liquid recovery main pipe 407, and a liquid supply booster pump 408 is installed on the outside of the waste liquid recovery main pipe 407. In order to filter the recovered waste liquid, the other end of the interstage connecting pipe 406 is connected to the top of the outer side of the coarse filter cylinder 402, the bottom end of the jacketed drain pipe 314 is connected to the top end of the waste liquid recovery main pipe 407, one end of the waste discharge pipe 321 is connected to one end of the waste liquid recovery main pipe 407, and the liquid supply booster pump 408 is powered by an external power source. The top of the ultrafiltration membrane cartridge 404 is fitted with a concentrated acid suction tube 409, one end of the concentrated acid suction tube 409 is fitted with an acid spray distribution tube 411, and atomizing nozzles 412 are fitted at equal intervals on the outside of the acid spray distribution tube 411. A clean wastewater discharge pipe 413 is snapped onto the top of the outer side of the ultrafiltration membrane cartridge 404; Bottom steam supply pipes 414 are equidistantly clamped to the bottom end of the liquid collection jacket 306. Anti-backflow cover plates 415 are clamped to the top end of the bottom steam supply pipes 414. In order to supplement the heat source, the height of the top end of the bottom steam supply pipes 414 is greater than the height of the jacket drain pipe 314. There is a gap between the anti-backflow cover plate 415 and the bottom steam supply pipes 414, and the outer diameter of the anti-backflow cover plate 415 is greater than the outer diameter of the bottom steam supply pipes 414. A steam distribution main pipe 416 is clamped to the bottom end of the bottom steam supply pipes 414. Hollow shaft steam supply elbows 417 are symmetrically clamped to the outside of the steam distribution main pipe 416. A hollow shaft rotary joint 418 is clamped to one adjacent end of each of the two hollow shaft steam supply elbows 417. The other end of the horizontal hydrolysis reaction cylinder 301 is clamped with an L-shaped support plate 419. Inside the L-shaped support plate 419, a waste heat steam guide sleeve 420 is clamped. The top of the waste heat steam guide sleeve 420 is clamped with a waste heat recovery input pipe 410. In order to replenish the reaction liquid, one end of the atomizing nozzle 412 passes through the top of the liquid collection jacket 306. One end of the hollow shaft rotary joint 418 and one end of the waste heat steam guide sleeve 420 are respectively rotatably connected to one end of the hollow rotating rod 304. One end of the waste heat recovery input pipe 410 is connected to one end of the raw material feed hopper 328.

[0024] The working principle and usage process of this invention are as follows: First, the raw materials and reaction liquid are mixed and stored inside the raw material feed hopper 328. Then, the horizontal pusher motor 303 is started, and the power is transmitted through the transmission gear 302, which drives the hollow rotating rod 304 and the spiral pusher blade 305 to rotate, so as to uniformly transport the raw materials. At the same time, the steam input pipe 327, the annular steam distribution ring 325 and the steam distribution branch pipe 326 are used to allow high-temperature steam to enter the horizontal hydrolysis reaction cylinder 301, so as to facilitate the mixing of steam with the raw materials and reaction liquid and generate a reaction. Then, during the reaction, the raw materials move at a constant speed inside the horizontal hydrolysis reaction cylinder 301. After reaching the inside of the liquid collection jacket 306, the liquid generated during the reaction is easily filtered through the separation filter plate 307 and falls into the liquid collection jacket 306. It is then discharged in time through the jacket drain pipe 314 to prevent the liquid from accumulating inside the liquid collection jacket 306. Meanwhile, some of the aldehyde vapor generated by the reaction is discharged from the separation filter plate 307 above and enters the liquid collection jacket 306, and is then discharged through the horizontal hydrolysis exhaust pipe 315. Next, the raw materials after the initial reaction are continuously transported to the transfer hopper 308 for temporary storage. Then, the uniform speed feeding motor 310 is started, driving the stirring rod 311 to rotate and stir the raw materials. Subsequently, the reaction liquid is added through the addition pipe, and after the reaction liquid is mixed with the raw materials, it is evenly transported to the vertical stripping reactor 312 through the vertical screw feeder 319. At the same time, through the cooperation of the annular steam distribution ring 325, the steam distribution branch pipe 326 and the steam input pipe 327, high-temperature steam is sent into the vertical stripping reactor 312 from bottom to top. The solid material moves slowly from top to bottom by gravity and the cooperation of the vertical screw feeder 319, so that the high-temperature steam continuously blows the solid material in a countercurrent, so that the residual furfural is squeezed out to the maximum extent. During the process of steam lifting, furfural is carried up to form aldehyde vapor, which is stored in the transfer hopper 308 and then discharged through the gas collecting cylinder 309 and the vertical stripping exhaust pipe 316. Then, through the cooperation of the aldehyde vapor collection manifold 317 and the aldehyde vapor exhaust fan 318, the aldehyde vapor discharged from the horizontal hydrolysis exhaust pipe 315 and the vertical stripping exhaust pipe 316 is conveniently sent into the steam-entrained aldehyde vapor and sent into the distillation vertical cylinder 329 to purify the aldehyde vapor and produce high-quality furfural. The solid material being transported down enters the slag discharge cylinder 313 and is filtered by the cross support 322 and the filtrate permeation plate 323. The residual liquid passes through the filtrate permeation plate 323 and falls into the collection hopper 320, which is then conveniently discharged through the waste discharge pipe 321. The solid material is discharged from the bottom of the slag discharge cylinder 313 for easy recycling. Next, the liquid discharged from the waste discharge pipe 321 and the jacketed discharge pipe 314 is transported to the coarse filter cartridge 402 through the waste liquid recovery main pipe 407 and the liquid supply booster pump 408, so that it can be filtered through the filter screen cartridge 403 to separate the impurities in the waste liquid. Then, it is transported to the ultrafiltration membrane cartridge 404 through the interstage connecting pipe 406, where it is filtered more finely by the multi-layer acid-resistant nanofiltration membrane 405. The water in the waste liquid is filtered and stored on the outside of the multi-layer acid-resistant nanofiltration membrane 405, so that it can be discharged through the clean wastewater discharge pipe 413 for subsequent recycling treatment. In addition, the dilute sulfuric acid in the waste liquid is stored inside the multi-layer acid-resistant nanofiltration membrane 405, which is convenient to be sent to the acid spray distribution pipe 411 through the concentrated acid suction pipe 409. It is then evenly sprayed into the liquid collection jacket 306 through the atomizing nozzle 412 and passes through the separation filter plate 307. It mixes with the solid material inside the horizontal hydrolysis reaction cylinder 301 to replenish the reaction liquid and ensure the reaction effect. At the same time, the reaction liquid has residual heat, which ensures the efficiency of the heating reaction. Next, through the cooperation of the steam diversion main pipe 416 and the bottom steam supply pipe 414, high-temperature steam is sent into the liquid collection jacket 306, forcing the steam to bypass the anti-backflow cover plate 415, pass through the bottom separation filter plate 307 and enter the horizontal hydrolysis reaction cylinder 301, contact the raw materials being transported, supplement the heat source, increase the temperature inside the horizontal hydrolysis reaction cylinder 301, ensure the reaction effect, and at the same time play a stripping role, so that the steam carries furfural through the top separation filter plate 307 and enters the liquid collection jacket 306, improving the efficiency of furfural production; Finally, through the cooperation of the hollow shaft steam supply bend 417, some high-temperature steam is sent into the hollow shaft rotary joint 418, which facilitates the subsequent high-temperature steam to flow in the reverse direction along the hollow rotating rod 304, thus opposite to the direction of solid material conveying. This further improves the heating effect inside the horizontal hydrolysis reaction cylinder 301 and increases the efficiency of furfural reaction production. The steam after heat exchange is then sent into the raw material feed hopper 328 through the cooperation of the waste heat steam guide sleeve 420 and the waste heat recovery input pipe 410, so that the steam after heat exchange preheats the material and improves the utilization rate of waste heat.

[0025] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency heat exchange reaction device for furfural production, comprising a base plate (1), characterized in that: The bottom plate (1) is attached to a support frame (2) at the top. The support frame (2) is provided with a heat exchange reaction and conveying separation mechanism (3) at the top. The heat exchange reaction and conveying separation mechanism (3) includes a horizontal hydrolysis reaction cylinder (301). The support frame (2) is equipped with a horizontal hydrolysis reaction cylinder (301) at the top. A hollow rotating rod (304) is connected inside the horizontal hydrolysis reaction cylinder (301), and a spiral pusher blade (305) is sleeved on the outside of the hollow rotating rod (304). The top of the support frame (2) is fitted with a transverse pusher motor (303), and transmission gears (302) are sleeved on the outer side of the output shaft of the transverse pusher motor (303) and the outer side of the hollow rotating rod (304). The horizontal hydrolysis reaction cylinder (301) is fitted with a liquid collection jacket (306) on the outside, and the horizontal hydrolysis reaction cylinder (301) is symmetrically fitted with separation filter plates (307) inside. The top of the support frame (2) is fitted with a transfer hopper (308), the top of the transfer hopper (308) is fitted with an air collecting cylinder (309), the top of the air collecting cylinder (309) is fitted with a uniform speed feeding motor (310), and the bottom of the output shaft of the uniform speed feeding motor (310) is fitted with a stirring rod (311). The bottom end of the transfer hopper (308) is fitted with a vertical stripping reactor (312), and the bottom end of the vertical stripping reactor (312) is fitted with a slag discharge cylinder (313).

2. The high-efficiency heat exchange reaction device for furfural production according to claim 1, characterized in that: The horizontal pusher motor (303) and the uniform speed feeding motor (310) are both powered by an external power source. The inner diameter of the separation filter plate (307) is equal to the inner diameter of the horizontal hydrolysis reaction cylinder (301), and the length of the separation filter plate (307) is less than the length of the liquid collection jacket (306). One end of the horizontal pusher motor (303) is connected to one end of the transfer hopper (308).

3. The high-efficiency heat exchange reaction device for furfural production according to claim 1, characterized in that: The liquid collecting jacket (306) is fitted with a jacket drain pipe (314) on one side of its bottom end. The liquid collecting jacket (306) is fitted with a horizontal hydrolysis exhaust pipe (315) on its top end. The gas collecting cylinder (309) is fitted with a vertical stripping exhaust pipe (316) on its outer side. Both the horizontal hydrolysis exhaust pipe (315) and the vertical stripping exhaust pipe (316) are fitted with an aldehyde vapor collection manifold (317) at their adjacent ends. An aldehyde vapor exhaust fan (318) is installed on the outer side of the aldehyde vapor collection manifold (317). A distillation vertical cylinder (329) is fitted with one end of the aldehyde vapor collection manifold (317). The inner wall of the slag discharge cylinder (313) is fitted with a liquid collection hopper (320), and the bottom end of the liquid collection hopper (320) is fitted with a waste discharge pipe (321). The inner wall of the liquid collection hopper (320) is fitted with a cross support frame (322). The top end of the cross support frame (322) is rotatably connected to a vertical screw feeder (319). The top end of the cross support frame (322) is fitted with a filtrate permeation plate (323) corresponding to the outside of the shaft of the vertical screw feeder (319). The top of the inner wall of the vertical stripping reaction cylinder (312) is fitted with a shaft anti-deviation frame (324) corresponding to the outside of the shaft of the vertical screw feeder (319). Both the horizontal hydrolysis reactor (301) and the vertical stripping reactor (312) are fixedly fitted with annular steam distribution rings (325). The inner wall of the annular steam distribution ring (325) is symmetrically fitted with steam distribution branch pipes (326). One end of the annular steam distribution ring (325) is fitted with a steam input pipe (327). A raw material feed hopper (328) is installed on the top of the horizontal hydrolysis reactor (301) on the side corresponding to the annular steam distribution ring (325).

4. The high-efficiency heat exchange reaction device for furfural production according to claim 3, characterized in that: The bottom end of the jacketed drain pipe (314) passes through the top end of the support frame 2. The aldehyde vapor exhaust fan (318) is powered by an external power source. One end of the waste discharge pipe (321) passes through one end of the slag discharge cylinder (313).

5. The high-efficiency heat exchange reaction device for furfural production according to claim 3, characterized in that: Both the spiral pusher blade (305) and the vertical spiral feeder (319) have mesh openings inside. The outer side of the vertical spiral feeder (319) is in contact with the inner wall of the vertical stripping reactor (312), and the top of the shaft of the vertical spiral feeder (319) is engaged with the bottom of the stirring rod (311).

6. The high-efficiency heat exchange reaction device for furfural production according to claim 3, characterized in that: The outer diameter of the filtrate permeation plate (323) is larger than the inner diameter of the vertical stripping reactor (312). The inner wall of the shaft anti-deviation frame (324) is rotatably connected to the outer side of the shaft of the vertical spiral feed auger (319). The steam distribution branch pipe (326) is fitted with a grid filter screen inside.

7. The high-efficiency heat exchange reaction device for furfural production according to claim 1, characterized in that: The bottom plate (1) is provided with a waste liquid treatment and circulation mechanism (4) at the top, and the waste liquid treatment and circulation mechanism (4) includes an equipment mounting frame (401). The bottom plate (1) is fitted with an equipment mounting bracket (401) at the top, and a coarse filter cylinder (402) is fitted inside one side of the equipment mounting bracket (401), and a filter screen cylinder (403) is installed inside the coarse filter cylinder (402). An ultrafiltration membrane cartridge (404) is installed on the other side of the equipment mounting frame (401), and a multi-layer acid-resistant nanofiltration membrane (405) is installed inside the ultrafiltration membrane cartridge (404). An interstage connecting pipe (406) is snapped onto the outside of the multi-layer acid-resistant nanofiltration membrane (405). The bottom of the outer side of the filter cylinder (403) is connected to a waste liquid recovery main pipe (407), and a liquid supply booster pump (408) is installed on the outer side of the waste liquid recovery main pipe (407). The top end of the ultrafiltration membrane cartridge (404) is fitted with a concentrated acid suction tube (409), one end of the concentrated acid suction tube (409) is fitted with an acid spray distribution tube (411), and atomizing nozzles (412) are fitted at equal intervals on the outside of the acid spray distribution tube (411). The ultrafiltration membrane cartridge (404) is fitted with a clean wastewater discharge pipe (413) at the top outer side. The bottom end of the liquid collection jacket (306) is equidistantly connected to a bottom steam supply pipe (414), the top end of the bottom steam supply pipe (414) is connected to an anti-backflow cover plate (415), the bottom end of the bottom steam supply pipe (414) is connected to a steam diversion main pipe (416), the outer side of the steam diversion main pipe (416) is symmetrically connected to a hollow shaft steam supply elbow (417), and the adjacent ends of the two hollow shaft steam supply elbows (417) are each connected to a hollow shaft rotary joint (418). The other end of the horizontal hydrolysis reaction cylinder (301) is fitted with an L-shaped support plate (419), and a waste heat steam guide sleeve (420) is fitted inside the L-shaped support plate (419). A waste heat recovery input pipe (410) is fitted at the top of the waste heat steam guide sleeve (420).

8. The high-efficiency heat exchange reaction device for furfural production according to claim 7, characterized in that: The other end of the interstage connecting pipe (406) is connected to the top of the outer side of the coarse filter cartridge (402), the bottom end of the jacketed drain pipe (314) is connected to the top end of the waste liquid recovery main pipe (407), one end of the waste discharge pipe (321) is connected to one end of the waste liquid recovery main pipe (407), and the liquid supply booster pump (408) is powered by an external power source.

9. The high-efficiency heat exchange reaction device for furfural production according to claim 7, characterized in that: The height of the top of the bottom steam supply pipe (414) is greater than the height of the jacketed drain pipe (314). There is a gap between the anti-backflow cover plate (415) and the bottom steam supply pipe (414), and the outer diameter of the anti-backflow cover plate (415) is greater than the outer diameter of the bottom steam supply pipe (414).

10. The high-efficiency heat exchange reaction device for furfural production according to claim 7, characterized in that: One end of the atomizing nozzle (412) passes through the top of the liquid collection jacket (306), one end of the hollow shaft rotary joint (418) and one end of the waste heat steam guide sleeve (420) are respectively rotatably connected to one end of the hollow rotating rod (304), and one end of the waste heat recovery input pipe (410) is connected to one end of the raw material feed hopper (328).

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