A kind of acid mixing and feeding device for furfural production

Abstract

The present application relates to an acid-mixing and feeding device for furfural production, and relates to the technical field of furfural production, which includes: an acid-mixing cylinder, a feed pipe is fixedly penetrated, the feed pipe is connected with a storage hopper, and the side wall of the feed pipe located at one end in the acid-mixing cylinder is connected with the acid-mixing cylinder; an acid-mixing assembly, including a material control part and an acid-mixing part, the material control part includes a first partition, a second partition, a push plate and a material control plate; the first partition and the second partition are both slidably penetrated on the feed pipe, and are arranged in sequence along the direction close to the acid-mixing cylinder, the push plate is arranged on one end of the feed pipe located in the acid-mixing cylinder, one end of the push plate is hinged on the side wall of the feed pipe, the material control plate is curved in an arc shape, and is fixed at the connection between the feed pipe and the acid-mixing cylinder, the other end of the push plate is slidably connected with the material control plate, the push plate is tilted, the first partition and the push plate are both hollow inside, the acid-mixing part is connected to the first partition and the push plate, and is used to make the first partition and the push plate spray acid to the raw material. The present application has the effect of making the raw material easy to be evenly acidified.

Description

Technical Field

[0001] The present application relates to the technical field of furfural production, and in particular to an acid preparation and feeding device for furfural production. Background Art

[0002] Furfural is an organic compound, mainly used as an industrial solvent. In the production process of furfural, the uniformity of acid preparation can directly affect the production quality of furfural, so an acid preparation device is required to mix the raw materials and dilute sulfuric acid.

[0003] The existing acid preparation device includes a horizontally arranged acid preparation pipe, an acid preparation cylinder is rotatably arranged in the acid preparation pipe, a plurality of stirring and conveying blades are arranged on the inner wall of the acid preparation cylinder along the circumferential direction and the axial direction, the feed end of the acid preparation pipe is connected with a feed hopper and an acid liquid spray head, and the discharge end of the acid preparation pipe is connected with a discharge pipe. When in use, the raw material is added into the acid preparation pipe from the feed hopper, the acid liquid spray head sprays the dilute sulfuric acid onto the raw material during the falling process of the raw material, so that the dilute sulfuric acid adheres to the raw material, and the acid preparation cylinder is rotated, and the acid preparation cylinder stirs and conveys the mixture of the raw material and the dilute sulfuric acid through the stirring and conveying blades, so that the mixed raw material is discharged from the discharge pipe, so as to complete the raw material acid preparation process and mix the raw material and the dilute sulfuric acid.

[0004] In the above technical solution, since the raw materials are fed continuously and the feeding amount is difficult to be uniform, it is difficult to spray the acid solution uniformly on the raw materials during the feeding process, which easily leads to large differences in the acid content of the raw materials and reduces the acid preparation effect. Summary of the invention

[0005] In order to make it easier for the raw materials to be evenly acidified and thus improve the acidification effect, the present application provides an acidification and feeding device for furfural production.

[0006] The present application provides an acid mixing and feeding device for furfural production, which adopts the following technical solution:

[0007] An acid preparation and feeding device for furfural production, comprising:

[0008] The acid preparation cylinder has a feed pipe fixedly penetrated on the side wall near one end, the feed pipe is connected to the storage hopper, and the feed pipe is located at the side wall at one end of the acid preparation cylinder and is connected to the acid preparation cylinder;

[0009] The acid dispensing assembly comprises a material control part and an acid dispensing part, wherein the material control part comprises a first baffle, a second baffle, a push plate and a material control plate, and the acid dispensing part comprises an acid liquid pipe, a first branch pipe, a second branch pipe and a nozzle;

[0010] in,

[0011] The first partition plate and the second partition plate are both slidably arranged on the feed pipe and are arranged in sequence in the direction close to the acid preparation cylinder. The push plate is arranged on one end of the feed pipe located in the acid preparation cylinder. One end of the push plate is connected with a hinge shaft and is hinged to the side wall of the feed pipe through the hinge shaft. The hinge shaft is arranged close to the side wall directly opposite to the connection between the feed pipe and the acid preparation cylinder. The material control plate is bent into an arc shape and is fixedly arranged at the connection between the feed pipe and the acid preparation cylinder. One end of the push plate away from the hinge shaft abuts against the material control plate. One end of the push plate away from the hinge shaft is slidably connected to the material control plate along the arc surface of the material control plate. The push plate is arranged vertically downwardly tilted.

[0012] The first partition and the push plate are both hollow inside, one end of the acid liquid pipe is used to flow in the acid liquid, and the other end is connected to the first branch pipe and the second branch pipe, the first branch pipe is connected to the inside of the first partition, and the second branch pipe is connected to the inside of the push plate, and two groups of nozzles are provided, and the number of nozzles in each group is multiple, the first group of nozzles are embedded on the side of the first partition close to the push plate, and are connected to the inside of the first partition, and the second group of nozzles are embedded on the side of the push plate close to the first partition, and are connected to the inside of the push plate;

[0013] In the process of the end of the push plate sliding from the top to the bottom of the material control plate, the first partition gradually closes the feed pipe and the second partition gradually opens the feed pipe; in the process of the end of the push plate sliding from the bottom to the top of the material control plate, the first partition gradually opens the feed pipe and the second partition gradually closes the feed pipe; when the push plate slides in the bottom area of ​​the material control plate, acid is sprayed out from the nozzle.

[0014] By adopting the above technical scheme, the raw materials are first stored in the storage hopper. During the swinging of the push plate, the first partition and the second partition can alternately open the feed pipe. The first partition and the second partition control the amount of raw material discharge, so that the raw materials can be intermittently and quantitatively added between the push plate and the control plate. When the push plate swings to the top of the control plate, the inclined push plate can push the raw materials into the acid preparation cylinder, so that the raw materials are discharged from between the control plate and the push plate before the next intermittent feeding, so that the raw materials can be discharged intermittently while intermittent feeding.

[0015] The acid liquid pipe supplies acid to the inside of the first partition through the first branch pipe, and supplies acid to the inside of the push plate through the second branch pipe. When the push plate slides in the bottom area of ​​the material control plate, the first partition blocks the raw materials in the storage hopper from being discharged. The first partition and the push plate both spray acid liquid to the raw materials through the nozzle, so that intermittent quantitative raw materials can be acidified from both the top and bottom directions, thereby increasing the raw material acidification area.

[0016] Compared with continuous acid spraying, the provision of the storage hopper, the first partition, the second partition, the push plate and the material control plate allows the raw materials to be fed intermittently, quantitatively and acid-coated over a large area, thereby making it easy for the raw materials to be evenly acid-coated and improving the acid preparation effect.

[0017] Optionally, the acid preparation component further includes an adjustment part, which includes a first adjustment box, a first partition plate and an adjustment plate. The first adjustment box is fixedly mounted on the acid preparation cylinder, the push plate is fixedly connected to the hinge shaft, one end of the hinge shaft rotates to pass through the feed pipe and rotates to pass into the first adjustment box, three first partition plates are provided, and all are fixed in the first adjustment box, the three first partition plates separate the space between the first adjustment box and the hinge shaft into an adjustment chamber, a control plate chamber and an acid control chamber, and connecting holes are provided on the two first partition plates of the adjustment chamber;

[0018] The adjusting plate is located in the adjusting cavity, and one end is fixedly connected to the hinge shaft. A first fluid medium flows between the space on the adjusting plate near the control plate cavity and the control plate cavity, and a second fluid medium flows between the space on the adjusting plate near the acid control cavity and the acid control cavity. The adjusting plate is used to drive the first partition and the second partition to slide through the first fluid medium, and the adjusting plate is used to control the opening and closing of the acid liquid pipe through the second fluid medium.

[0019] By adopting the above technical solution, when the push plate swings back and forth, the push plate can drive the adjustment plate to swing through the hinge shaft, and the adjustment plate can drive the first fluid medium and the second fluid medium to flow during the swinging process. When the adjustment plate drives the first fluid medium to flow into the control plate cavity, it can drive the second fluid medium to flow into the adjustment cavity. Conversely, when the adjustment plate drives the second fluid medium to flow into the acid control cavity, it can drive the first fluid medium to flow into the adjustment cavity, so that the first partition and the second partition can open and close the feed pipe and the acid liquid pipe with the help of the driving force formed by the swinging of the push plate, and at the same time, the movements of the first partition, the second partition and the acid liquid pipe can be synchronized with the swinging of the push plate.

[0020] Optionally, a first pipeline is connected to the side wall of the first adjustment box corresponding to the control plate cavity, the first pipeline is connected to an adjustable telescopic rod, the adjustable telescopic rod is fixed on the feed pipe, the rodless cavity of the adjustable telescopic rod is sealed, the rod cavity of the adjustable telescopic rod is connected to the atmosphere, the rodless cavity of the adjustable telescopic rod is connected to the first pipeline, the first pipeline can make the first fluid medium in the control plate cavity flow into the rodless cavity of the adjustable telescopic rod, and the movable end of the adjustable telescopic rod is fixedly connected to the first partition plate and the second partition plate.

[0021] By adopting the above technical solution, the adjustment plate drives the first fluid medium to flow between the adjustment chamber and the control plate chamber during the swinging process. When the first fluid medium flows from the control plate chamber into the adjustment chamber, the first fluid medium can drive the adjustment telescopic rod to contract through the first pipeline. When the first fluid medium flows from the adjustment chamber into the control plate chamber, the first fluid medium can drive the adjustment telescopic rod to extend through the first pipeline. When the adjustment telescopic rod is extended, it can drive the first partition and the second partition to slide synchronously, so that the adjustment plate can synchronously drive the first partition and the second partition when swinging.

[0022] Optionally, a second pipeline is connected to the side wall corresponding to the first regulating box and the acid control chamber, the second pipeline is connected to the second regulating box, the second regulating box is fixedly connected to a ball valve, the ball valve is arranged on the acid liquid pipe, the valve stem of the ball valve rotates and penetrates into the second regulating box, a second partition plate and a swing plate are arranged in the second regulating box, the second partition plate and the swing plate separate the space between the second regulating box and the valve stem of the ball valve into two chambers, the second partition plate is fixedly connected to the second regulating box, the swing plate is fixedly connected to the valve stem of the ball valve, the second pipeline is connected to one of the chambers, the second pipeline can make the second fluid medium in the acid control chamber flow into the chamber, and an air hole connected to the atmosphere is opened on the side wall corresponding to the second regulating box and the other chamber.

[0023] By adopting the above technical solution, the regulating plate drives the second fluid medium to flow between the regulating chamber and the acid control chamber during the swinging process. When the second fluid medium flows from the acid control chamber into the regulating chamber, the second fluid medium can drive the swing plate to swing through the second pipeline to increase the volume of the chamber in which the air hole is opened in the second regulating box. When the second fluid medium flows from the regulating chamber into the acid control chamber, the second fluid medium can drive the swing plate to swing in the opposite direction through the second pipeline to reduce the volume of the chamber in which the air hole is opened in the second regulating box. The swing plate can drive the valve stem of the ball valve to rotate during the swinging process to open or close the acid liquid tube, so that the regulating plate can synchronously control the opening and closing of the acid liquid tube during the swinging process.

[0024] Optionally, the acid preparation cylinder is provided with a mixing and transporting assembly, which includes a stirring part and a conversion part. The stirring part is arranged in the acid preparation cylinder and is used to stir the mixture of raw materials and acid liquid. The conversion part is arranged on the stirring part and is used to intermittently control the stirring part to transport the mixture of raw materials and acid liquid.

[0025] By adopting the above technical scheme, the stirring part stirs the mixture of the raw material and the acid liquid to make the raw material and the acid liquid mixed more evenly, and the stirring part can be intermittently controlled to convey the mixture of the raw material and the acid liquid through the conversion part. Compared with simultaneous stirring and conveying, the stirring time of the raw material and the acid liquid is extended, and the conveying function is retained, thereby realizing the conveying of the raw material and the acid liquid under the condition of improving the stirring uniformity of the raw material and the acid liquid.

[0026] Optionally, the stirring part includes a motor, a stirring tube and a stirring plate. The motor is fixed on one end of the acid preparation cylinder away from the feeding tube. The stirring tube is located in the acid preparation cylinder and is connected to the output shaft of the motor. There are multiple groups of stirring plates along the circumference of the stirring tube. Each group of stirring plates has multiple numbers and are arranged along the axial direction of the stirring tube. The stirring plates are connected to the stirring tube.

[0027] By adopting the above technical solution, the stirring tube is driven to rotate by a motor, and the stirring tube drives the stirring plate to rotate, so that the mixture of raw materials and acid solution can be stirred in the acid preparation cylinder, so that the acid preparation of the acid-treated raw materials is more uniform.

[0028] Optionally, the conversion part includes a transmission shaft, a transmission plate, a sliding rod and an adjusting shaft, the transmission shaft is passed through the inside of the stirring tube and is fixedly connected to the stirring tube, the transmission shaft is coaxially fixedly connected to the output shaft of the motor, the transmission shaft is reciprocatingly threaded through the transmission plate, and the transmission plate is slidably connected to the acid preparation cylinder along the axial direction of the transmission shaft;

[0029] There are multiple slide bars, which correspond to multiple groups of stirring plates arranged along the circumference of the stirring tube. One end of the slide bar is fixedly connected to the transmission plate along the axial direction of the transmission shaft, and is rotatably connected to the transmission plate around the axial direction of the transmission shaft.

[0030] There are multiple adjusting shafts, and they correspond one-to-one with the stirring plates. The adjusting shafts are rotatably arranged on the stirring tube. One end of the adjusting shaft located outside the stirring tube is fixedly connected to the stirring plate, and one end of the adjusting shaft located inside the stirring tube is coaxially fixedly connected with a transmission gear. All the transmission gears corresponding to each group of stirring plates are commonly meshed with a rack, the rack is slidably connected to the stirring tube, the rack corresponds one-to-one to the sliding rod, and the rack and the sliding rod are elastically telescopically connected.

[0031] By adopting the above technical scheme, the motor can drive the stirring tube to rotate through the transmission shaft, and the transmission shaft can drive the transmission plate to move when rotating. When moving, the transmission plate can drive the transmission gear to rotate through the slide rod and the rack, and the transmission gear can drive the stirring plate to rotate through the adjusting shaft, so that the plate surface of the stirring plate can be changed from a state parallel to the axis of the stirring tube to a state inclined to the axis of the stirring tube, so that the stirring plate can be switched from a stirring state to a conveying state, so that the raw materials can be conveyed during the stirring process, and because the rack and the slide rod are elastically telescopically connected, the transmission plate can keep the stirring plate in the switched state for a period of time through elastic expansion and contraction, thereby improving the conveying effect and stirring effect of the stirring plate.

[0032] Optionally, a telescopic tube is fixedly provided between the rack and the slide rod, a spring is provided in the telescopic tube, and two ends of the spring are respectively fixedly connected to two ends of the telescopic tube.

[0033] By adopting the above technical solution, the slide rod realizes an elastic telescopic connection with the rack through the telescopic tube and the spring, and the slide rod can move the transmission plate after the stirring plate state is switched by compressing and stretching the spring.

[0034] Optionally, one end of the stirring plate away from the stirring tube is arc-shaped and abuts against the inner wall of the acid preparation cylinder. When the stirring plate rotates and tilts, the arc-shaped end of the stirring plate fits against the inner wall of the acid preparation cylinder.

[0035] By adopting the above technical solution, when the plate surface of the stirring plate is inclined with the axis of the stirring tube, the end of the stirring plate can fit on the inner wall of the acid preparation cylinder, so that the stirring plate can fit on the side wall of the acid preparation cylinder to transport the mixture of raw materials and acid solution.

[0036] Optionally, the stirring tube is connected to a transmission assembly, which includes a first bevel gear, a second bevel gear, a reciprocating screw, a transmission block and a transmission telescopic rod. The first bevel gear is coaxially fixed on the stirring tube, the second bevel gear is meshed with the first bevel gear and is coaxially fixed to the reciprocating screw, the reciprocating screw is rotatably connected to the acid dispensing cylinder, the transmission block is sleeved on the reciprocating screw and is threadedly connected to the reciprocating screw, the transmission telescopic rod is fixedly connected to the transmission block, and the movable end of the transmission telescopic rod is hinged with a slider, the slider is slidably arranged in a sliding hole opened on the material control plate, and the slider is fixedly connected to the end of the push plate away from the hinge shaft.

[0037] By adopting the above technical solution, the stirring tube can drive the reciprocating screw to rotate through the first bevel gear and the second bevel gear, the reciprocating screw drives the transmission block to move back and forth, the transmission block drives the transmission telescopic rod to move back and forth, and the transmission telescopic rod drives the push plate to swing back and forth through the slider during the movement, so that the push plate can use the driving force generated by the rotation of the stirring tube, reducing the driving source and reducing energy consumption.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. By setting the feed pipe, storage hopper, first baffle, second baffle, push plate, material control plate, acid pipe, first branch pipe, second branch pipe and nozzle, the raw materials can be intermittently fed and discharged quantitatively, and the acid-coating area of ​​the quantitatively fed raw materials is increased, so that the raw materials are easy to be evenly acidified, and the acid-coating effect is improved;

[0040] 2. By arranging the first regulating box, the first partition plate, the regulating plate, the regulating telescopic rod, the second regulating box, the second partition plate, the swing plate and the ball valve, the push plate can synchronously drive the first partition plate and the second partition plate to open and close the feed pipe and synchronously control the opening and closing of the acid liquid pipe when swinging;

[0041] 3. By arranging a motor, a stirring tube, a stirring plate, an adjusting shaft, a transmission shaft, a transmission plate, a sliding rod, a rack and a transmission gear, the raw materials and the acid liquid in the acid preparation cylinder can be stirred and transported, and the stirring effect of the raw materials and the acid liquid is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0043] Figure 2 It is a schematic diagram of the structure of the acid preparation component, mixing and transportation component and transmission component;

[0044] Figure 3 yes Figure 2 Magnified view at A in the middle;

[0045] Figure 4 is a schematic structural diagram of a first regulating box, a first partition plate and an regulating plate;

[0046] Figure 5 It is a structural schematic diagram of the second regulating box, the ball valve, the second partition plate and the swing plate;

[0047] Figure 6 It is a structural schematic diagram of the conversion unit;

[0048] Figure 7 yes Figure 6 Magnified view at B.

[0049] Description of reference numerals:

[0050] 1. Acid dispensing cylinder; 11. Feed pipe; 12. Storage hopper; 13. Discharge pipe; 2. Acid dispensing assembly; 21. Material control unit; 211. First baffle; 212. Second baffle; 213. Push plate; 2131. Articulated shaft; 214. Material control plate; 2141. Slide hole; 215. Material blocking plate; 22. Acid dispensing unit; 221. Acid liquid pipe; 222. First branch pipe; 223. Second branch pipe; 224. Nozzle; 23. Adjustment unit; 231. First adjustment box; 2311. First pipeline; 2312. Second pipeline; 232. First partition plate; 2321. Adjustment chamber; 2322. Control plate chamber; 2323. Acid control chamber; 2324. Connecting hole; 233, adjusting plate; 234, adjusting telescopic rod; 235, second adjusting box; 2351, air hole; 236, ball valve; 237, second partition plate; 238, swing plate; 3, mixing and conveying assembly; 31, stirring part; 311, motor; 312, stirring tube; 313, stirring plate; 32, conversion part; 321, transmission shaft; 322, transmission plate; 323, slide bar; 324, adjusting shaft; 325, transmission gear; 326, rack; 327, telescopic tube; 328, spring; 4, transmission assembly; 41, first bevel gear; 42, second bevel gear; 43, reciprocating screw; 44, transmission block; 45, transmission telescopic rod; 46, slider. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1-7 This application is described in further detail.

[0052] The present application embodiment discloses an acid mixing and feeding device for furfural production. Figure 1 and Figure 2 A furfural production acid preparation and feeding device comprises an acid preparation cylinder 1, an acid preparation component 2 and a mixing and feeding component 3. The acid preparation component 2 is arranged at one end of the acid preparation cylinder 1, and the mixing and feeding component 3 is arranged in the acid preparation cylinder 1. The acid preparation component 2 is used for intermittently and quantitatively feeding raw materials into the acid preparation cylinder 1. The acid preparation component 2 is used for spraying acid from the top and bottom of the raw materials fed each time. The mixing and feeding component 3 is used for stirring a mixture of raw materials and acid solution. The mixing and feeding component 3 is used for intermittently conveying a mixture of raw materials and acid solution.

[0053] When in use, the raw materials are intermittently and quantitatively added into the acid preparation cylinder 1 through the acid preparation component 2, the acid preparation component 2 sprays acid from the top and bottom of the raw materials fed quantitatively each time, and the mixing and conveying component 3 stirs and intermittently conveys the raw materials and acid liquid entering the acid preparation cylinder 1. Through intermittent quantitative feeding, large-area acid spraying and extended stirring time, the raw materials are easy to be evenly acidified, thereby improving the acid preparation effect.

[0054] Reference Figure 2 The acid preparation cylinder 1 is in a circular cylindrical shape and is arranged horizontally. Both ends of the acid preparation cylinder 1 in the axial direction are sealed. A feed pipe 11 is fixedly penetrated on the side wall near one end of the acid preparation cylinder 1. The feed pipe 11 is in a rectangular tube shape and is arranged vertically. The connection position between the feed pipe 11 and the acid preparation cylinder 1 is located at the top of the acid preparation cylinder 1. The end of the feed pipe 11 located in the acid preparation cylinder 1 is arranged near the bottom of the acid preparation cylinder 1. The side wall of the feed pipe 11 at one end of the acid preparation cylinder 1 is connected with the acid preparation cylinder 1, and the side wall where the feed pipe 11 is connected with the acid preparation cylinder 1 is arranged near the middle of the acid preparation cylinder 1.

[0055] Reference Figure 1 A storage hopper 12 is vertically arranged above the feed pipe 11. The storage hopper 12 is in a rectangular cylindrical shape, and the bottom is contracted into a quadrangular pyramid shape. The bottom end of the storage hopper 12 is connected to the top of the feed pipe 11. A discharge pipe 13 is connected to the side wall of the acid preparation cylinder 1 away from the end of the feed pipe 11. The discharge pipe 13 is in a circular tubular shape, and is vertically arranged and located below the acid preparation cylinder 1.

[0056] Reference Figure 1 and Figure 2 The acid preparation component 2 includes a material control part 21, an acid preparation part 22 and an adjustment part 23. The material control part 21 includes a first partition 211, a second partition 212, a push plate 213 and a material control plate 214. The first partition 211 and the second partition 212 are both rectangular plates and are both horizontally arranged. The first partition 211 and the second partition 212 are both slidably arranged on the feed pipe 11 along the axial direction of the acid preparation cylinder 1. The first partition 211 and the second partition 212 are arranged in sequence along the direction close to the acid preparation cylinder 1. The first partition 211 slides into the feed pipe 11 along the direction close to the discharge pipe 13, and the second partition 212 slides into the feed pipe 11 along the direction away from the discharge pipe 13. When the first partition 211 closes the feed pipe 11, the second partition 212 opens the feed pipe 11.

[0057] Reference Figure 2 The push plate 213 is in the shape of a rectangular plate and is arranged on one end of the feed pipe 11 located in the acid preparation cylinder 1. A hinge shaft 2131 is fixedly connected to one end of the push plate 213 in the length direction. The hinge shaft 2131 is rotatably connected to the side wall of the feed pipe 11. The hinge shaft 2131 is arranged close to the side wall opposite to the connection point between the feed pipe 11 and the acid preparation cylinder 1. The push plate 213 and the feed pipe 11 are hinged through the hinge shaft 2131.

[0058] The material control plate 214 is in the shape of a rectangular plate and is curved in an arc shape. The material control plate 214 is fixedly arranged at the connection between the feed pipe 11 and the acid preparation cylinder 1. The top of the material control plate 214 is inserted into the acid preparation cylinder 1. Material blocking plates 215 are fixedly arranged between the two sides of the material control plate 214 inserted into the top of the acid preparation cylinder 1 and the feed pipe 11. One end of the push plate 213 away from the hinge shaft 2131 abuts against the material control plate 214, and one end of the push plate 213 away from the hinge shaft 2131 is slidably connected to the material control plate 214 along the arc surface of the material control plate 214, and the push plate 213 is arranged vertically and tilted downward.

[0059] Reference Figure 1 , Figure 2 and Figure 3 The first partition plate 211 and the push plate 213 are both hollow inside. The acid distribution part 22 includes an acid liquid pipe 221, a first branch pipe 222, a second branch pipe 223 and a nozzle 224. The acid liquid pipe 221, the first branch pipe 222 and the second branch pipe 223 are all circular tubes. One end of the acid liquid pipe 221 is used for the acid liquid to flow in, and the other end is connected to the first branch pipe 222 and the second branch pipe 223. The end of the first branch pipe 222 away from the acid liquid pipe 221 is connected to the inside of the first partition plate 211, and the end of the second branch pipe 223 away from the acid liquid pipe 221 is connected to the inside of the push plate 213.

[0060] Reference Figure 2 and Figure 3 There are two groups of nozzles 224, and each group of nozzles 224 has multiple nozzles. The first group of nozzles 224 are embedded in one side of the first partition 211 close to the push plate 213, and are connected to the inside of the first partition 211. The second group of nozzles 224 are embedded in one side of the push plate 213 close to the first partition 211, and are connected to the inside of the push plate 213. The two groups of nozzles 224 are arranged in a rectangular array.

[0061] Reference Figure 1 , Figure 4 and Figure 5 The regulating portion 23 includes a first regulating box 231 , a first partition plate 232 , an regulating plate 233 , an adjusting telescopic rod 234 , a second regulating box 235 , a ball valve 236 , a second partition plate 237 and a swing plate 238 .

[0062] Reference Figure 1 and Figure 4 The first regulating box 231 is in the shape of a circular box and is fixedly mounted on the outer wall of the acid preparation cylinder 1 . The first regulating box 231 is coaxially arranged with the hinge shaft 2131 . One end of the hinge shaft 2131 close to the first regulating box 231 rotates out of the feed pipe 11 and rotates into the first regulating box 231 .

[0063] Reference Figure 4The first partition plate 232 is in the shape of a rectangular plate, and there are three of them. The three first partition plates 232 are all fixed in the first adjusting box 231 and are evenly arranged around the axial direction of the first adjusting box 231. The three first partition plates 232 separate the space between the first adjusting box 231 and the hinge shaft 2131 into an adjusting chamber 2321, a control plate chamber 2322 and an acid control chamber 2323. The control plate chamber 2322 is located at the top of the first adjusting box 231. The two first partition plates 232 of the adjusting chamber 2321 are each provided with a connecting hole 2324. The connecting hole 2324 is circular and passes through the first partition plate 232.

[0064] The adjustment plate 233 is in the shape of a rectangular plate and is located in the adjustment chamber 2321. One end of the adjustment plate 233 is fixedly connected to the hinge shaft 2131, and the other end is slidably connected to the first adjustment box 231 along the side wall of the first adjustment box 231. The adjustment plate 233 divides the adjustment chamber 2321 into two independent chambers. A first fluid medium flows between the space on the side of the adjustment plate 233 close to the control plate chamber 2322 and the control plate chamber 2322 through the connecting hole 2324. A second fluid medium flows between the space on the side of the adjustment plate 233 close to the acid control chamber 2323 and the acid control chamber 2323 through the connecting hole 2324. Both the first fluid medium and the second fluid medium can be hydraulic oil or air. In the present application, the first fluid medium is hydraulic oil and the second fluid medium is air.

[0065] Reference Figure 1 and Figure 4 A first pipeline 2311 is connected on the side wall corresponding to the first adjusting box 231 and the control plate cavity 2322. One end of the first pipeline 2311 away from the first adjusting box 231 is connected to the rodless cavity of the adjusting telescopic rod 234. The adjusting telescopic rod 234 is fixed on the outer wall of the feeding pipe 11, and the telescopic direction is parallel to the sliding direction of the first partition 211. The rodless cavity of the adjusting telescopic rod 234 is sealed, and the rod cavity of the adjusting telescopic rod 234 is connected to the atmosphere. The first pipeline 2311 can make the first fluid medium in the control plate cavity 2322 flow into the rodless cavity of the adjusting telescopic rod 234. The movable end of the adjusting telescopic rod 234 is fixed to the end of the first partition 211 and the second partition 212.

[0066] Reference Figure 1 , Figure 4 and Figure 5 A second pipeline 2312 is connected to the side wall corresponding to the first regulating box 231 and the acid control chamber 2323. The end of the second pipeline 2312 away from the first regulating box 231 is connected to the side wall of the second regulating box 235. The second regulating box 235 is in a circular box shape and is fixedly connected to the ball valve 236. The ball valve 236 is arranged on the acid liquid pipe 221, and the valve stem of the ball valve 236 rotates and penetrates into the second regulating box 235.

[0067] Reference Figure 4 and Figure 5 The second partition plate 237 and the swing plate 238 are both rectangular plates and are both located in the second regulating box 235. The second partition plate 237 and the swing plate 238 separate the space between the second regulating box 235 and the valve stem of the ball valve 236 into two chambers. The second partition plate 237 is fixedly connected to the second regulating box 235, and the swing plate 238 is fixedly connected to the valve stem of the ball valve 236. One end of the swing plate 238 away from the valve stem of the ball valve 236 is slidably connected to the second regulating box 235 along the side wall of the second regulating box 235. The second pipeline 2312 is connected to one of the chambers. The second pipeline 2312 can make the second fluid medium in the acid control chamber 2323 flow into the chamber. The side wall corresponding to the second regulating box 235 and the other chamber is provided with an air hole 2351 connected to the atmosphere.

[0068] Reference Figure 2 In the process that the end of the push plate 213 slides from the top end to the bottom end of the material control plate 214, the telescopic rod 234 is adjusted to drive the first partition 211 to gradually close the feed pipe 11, and drive the second partition 212 to gradually open the feed pipe 11.

[0069] When the end of the push plate 213 slides from the bottom end to the top end of the material control plate 214 , the telescopic rod 234 is adjusted to drive the first partition 211 to gradually open the feed pipe 11 , and drives the second partition 212 to gradually close the feed pipe 11 .

[0070] Reference Figure 2 and Figure 5 When the push plate 213 slides in the bottom area of ​​the material control plate 214, the swing plate 238 drives the ball valve 236 to open the acid liquid pipe 221 so that the acid liquid is sprayed out from the nozzle 224; when the nozzle 224 on the first partition plate 211 slides out of the feed pipe 11, the swing plate 238 drives the ball valve 236 to close the acid liquid pipe 221.

[0071] When in use, the raw materials are loaded into the storage hopper 12, the raw materials are accumulated in the storage hopper 12, the push plate 213 is swung, the end of the push plate 213 is pressed against the material control plate 214 to slide, the push plate 213 drives the adjustment plate 233 to swing through the hinge shaft 2131, in the initial state, the first partition 211 opens the feed pipe 11, the second partition 212 closes the feed pipe 11, the raw materials are temporarily stored between the first partition 211 and the second partition 212, the push plate 213 slides to the bottom end of the material control plate 214, and the adjustment plate 233 drives the first fluid medium to flow from the rodless cavity of the adjusting telescopic rod 234 into the adjusting cavity 2321 through the control plate cavity 2322. The first fluid medium drives the adjusting telescopic rod 234 to contract. The adjusting telescopic rod 234 drives the first partition 211 to gradually close the feed pipe 11, and drives the second partition 212 to gradually open the feed pipe 11, so that the raw material between the first partition 211 and the second partition 212 falls between the push plate 213 and the control plate 214, thereby realizing intermittent quantitative unloading of raw materials.

[0072] The regulating plate 233 drives the second fluid medium to flow into the second regulating box 235 through the acid control chamber 2323, and the second fluid medium drives the swing plate 238 to swing, and the swing plate 238 drives the valve stem of the ball valve 236 to rotate. When the end of the push plate 213 slides to the bottom of the material control plate 214, all the nozzles 224 on the first partition 211 slide into the feed pipe 11, and the ball valve 236 connects the acid liquid pipe 221. The acid liquid flows from the first branch pipe 222 into the first partition 211, and flows from the second branch pipe 223 into the push plate 213. The acid liquid inside the first partition 211 is sprayed from the nozzle 224 on the top of the raw material, and the acid liquid inside the push plate 213 is sprayed from the nozzle 224 on the bottom of the raw material, thereby increasing the spray area of ​​the acid liquid on the raw material, thereby making it easy to evenly acidify the raw material through intermittent quantitative feeding and increasing the acid liquid spray area, thereby improving the acid distribution effect.

[0073] The push plate 213 slides to the top of the material control plate 214, and the push plate 213 pushes the raw material and acid solution into the acid preparation cylinder 1. The push plate 213 drives the first baffle 211 and the second baffle 212 to move through the first fluid medium, so that the first baffle 211 opens the feed pipe 11, and the second baffle 212 closes the feed pipe 11. The push plate 213 drives the ball valve 236 to close the acid solution pipe 221 after sliding away from the bottom of the material control plate 214 through the second fluid medium, so that the raw material can be discharged into the acid preparation cylinder 1, and when discharging, the nozzle 224 stops spraying the acid solution.

[0074] Reference Figure 1 and Figure 6 The mixing and conveying assembly 3 includes a stirring part 31 and a conversion part 32. The stirring part 31 includes a motor 311, a stirring tube 312 and a stirring plate 313. The motor 311 is fixedly arranged on one end of the acid preparation cylinder 1 away from the feeding tube 11. The motor 311 is coaxially arranged with the acid preparation cylinder 1, and the output shaft of the motor 311 rotates and penetrates into the acid preparation cylinder 1; the stirring tube 312 is in a rectangular tube shape and is located in the acid preparation cylinder 1. The central axis of the stirring tube 312 coincides with the central axis of the acid preparation cylinder 1, and the stirring tube 312 is connected to the output shaft of the motor 311; the stirring plate 313 is in a rectangular plate shape, and four groups of stirring plates 313 are arranged along the circumference of the stirring tube 312. The number of stirring plates 313 in each group is multiple, and they are all arranged along the axial direction of the stirring tube 312. The four groups of stirring plates 313 correspond to the four side walls of the stirring tube 312 respectively, and the stirring plates 313 are connected to the stirring tube 312.

[0075] Reference Figure 6 The conversion part 32 includes a transmission shaft 321, a transmission plate 322, a sliding rod 323 and an adjusting shaft 324. The transmission shaft 321 is passed through the stirring tube 312 and is coaxially arranged with the acid preparation cylinder 1. The transmission shaft 321 is fixedly connected to the stirring tube 312, and one end of the transmission shaft 321 close to the motor 311 is coaxially fixedly connected to the output shaft of the motor 311.

[0076] The transmission plate 322 is circular and coaxial with the transmission shaft 321. The transmission plate 322 is located at one end of the transmission shaft 321 close to the motor 311. The transmission shaft 321 is reciprocatingly threaded on the transmission plate 322. The transmission plate 322 is slidably connected to the acid preparation cylinder 1 along the axial direction of the transmission shaft 321.

[0077] The sliding rod 323 is in the shape of a round rod, and four of them are provided. The four sliding rods 323 correspond one by one to the four groups of stirring plates 313. The sliding rod 323 is located on the side of the transmission plate 322 away from the motor 311. The axial direction of the sliding rod 323 is parallel to the axial direction of the transmission shaft 321. One end of the sliding rod 323 close to the transmission plate 322 is fixedly connected to the transmission plate 322 along the axial direction of the transmission shaft 321. One end of the sliding rod 323 close to the transmission plate 322 is rotatably connected to the transmission plate 322 around the axial direction of the transmission shaft 321.

[0078] Reference Figure 6 and Figure 7 There are multiple adjusting shafts 324, and they correspond one to one with the stirring plates 313. The adjusting shafts 324 are rotatably penetrated on the side wall of the stirring tube 312. One end of the adjusting shaft 324 located outside the stirring tube 312 is fixedly connected to the stirring plate 313, and one end of the adjusting shaft 324 located inside the stirring tube 312 is coaxially fixedly connected with a transmission gear 325. All the transmission gears 325 corresponding to each group of stirring plates 313 are commonly meshed with a rack 326, and the rack 326 is slidably connected to the stirring tube 312 along the axial direction of the transmission shaft 321.

[0079] Reference Figure 6 The rack 326 corresponds to the slide bar 323 one by one, and a circular tubular telescopic tube 327 is fixed between the rack 326 and the slide bar 323. The telescopic tube 327 is coaxially arranged with the slide bar 323. The telescopic direction of the telescopic tube 327 is consistent with the axial direction of the slide bar 323. Both ends of the telescopic tube 327 are sealed. A spring 328 is arranged in the telescopic tube 327, and both ends of the spring 328 are respectively fixedly connected to the two ends of the telescopic tube 327.

[0080] One end of the stirring plate 313 away from the stirring tube 312 is arc-shaped and abuts against the inner wall of the acid preparation cylinder 1; when the stirring plate 313 is in a stirring state, the plate surface of the stirring plate 313 is parallel to the axis of the acid preparation cylinder 1; when the stirring plate 313 rotates and tilts, the stirring plate 313 is in a conveying state, and the arc-shaped end of the stirring plate 313 is in contact with the inner wall of the acid preparation cylinder 1.

[0081] When in use, the motor 311 is started, and the motor 311 drives the stirring tube 312 to rotate through the transmission shaft 321. The motor 311 drives the transmission plate 322 to move back and forth through the transmission shaft 321. The stirring tube 312 drives the stirring plate 313 to rotate, and the stirring plate 313 stirs the raw material and the acid solution to make the raw material and the acid solution mixed evenly; the transmission plate 322 drives the sliding rod 323, the telescopic tube 327 and the rack 326 to slide. When the transmission plate 322 moves to a position close to the stirring tube 312, the transmission plate 322 drives the transmission gear 325 to rotate through the sliding rod 323, the telescopic tube 327 and the rack 326. The transmission gear 325 drives the stirring plate 313 to rotate through the adjusting shaft 324, so that the stirring plate 313 is tilted. The tilted stirring plate 313 conveys the mixture of the raw material and the acid solution, so that the mixture of the raw material and the acid solution gradually approaches the discharge pipe 13 under the intermittent conveying action, thereby extending the stirring time of the raw material and the acid solution through the intermittent conveying mode, and improving the stirring uniformity of the raw material and the acid solution.

[0082] The sliding stroke of the rack 326 is limited to switching the stirring plate 313 between the two states of being inclined and being parallel to the axis of the acid preparation cylinder 1; after the rack 326 drives the transmission gear 325 to tilt the stirring plate 313, the transmission plate 322 squeezes the telescopic tube 327 through the slide rod 323 to contract, and puts the spring 328 in a compressed state. Under the elastic force of the spring 328, the stirring plate 313 is easy to maintain the inclined state; after the rack 326 reversely drives the transmission gear 325 to make the stirring plate 313 parallel to the axis of the acid preparation cylinder 1, the transmission plate 322 pulls the telescopic tube 327 through the slide rod 323 to stretch, and puts the spring 328 in a stretched state. Under the elastic force of the spring 328, the stirring plate 313 is easy to maintain the state of being parallel to the axis of the acid preparation cylinder 1.

[0083] Reference Figure 2 The stirring tube 312 is connected to a transmission assembly 4, which includes a first bevel gear 41, a second bevel gear 42, a reciprocating screw 43, a transmission block 44 and a transmission telescopic rod 45. The first bevel gear 41 is coaxially fixedly sleeved on the stirring tube 312 and is arranged close to the material control plate 214; the second bevel gear 42 is meshed with the first bevel gear 41 and is located below the first bevel gear 41; the reciprocating screw 43 is located below the second bevel gear 42 and is coaxially fixedly connected to the second bevel gear 42, and one end of the reciprocating screw 43 away from the second bevel gear 42 is rotatably connected to the acid preparation cylinder 1.

[0084] Reference Figure 2 and Figure 3The transmission block 44 is rectangular and sleeved on the reciprocating screw 43. The transmission block 44 is threadedly connected to the reciprocating screw 43. The transmission telescopic rod 45 is fixedly connected to the transmission block 44. The movable end of the transmission telescopic rod 45 is hinged with a slider 46. The slider 46 is rectangular and slidably arranged in a slide hole 2141 provided on the material control plate 214. The slider 46 is fixedly connected to one end of the push plate 213 close to the material control plate 214.

[0085] When in use, the stirring tube 312 drives the second bevel gear 42 to rotate through the first bevel gear 41, the second bevel gear 42 drives the reciprocating screw 43 to rotate, the reciprocating screw 43 drives the transmission block 44 to move back and forth, the transmission block 44 drives the transmission telescopic rod 45 to move back and forth, the transmission telescopic rod 45 drives the slider 46 to slide back and forth in the slide hole 2141, the slider 46 drives the push plate 213 to swing back and forth, so that the push plate 213 can swing back and forth with the help of the driving force generated by the rotation of the stirring tube 312.

[0086] The implementation principle of an acid-mixing and feeding device for furfural production in an embodiment of the present application is as follows: when in use, the raw material is loaded into the storage hopper 12, the raw material is accumulated in the storage hopper 12, the motor 311 is started, the motor 311 drives the transmission shaft 321 and the stirring tube 312 to rotate, the transmission shaft 321 drives the transmission plate 322 to move back and forth, the stirring tube 312 drives the push plate 213 to swing back and forth, the push plate 213 drives the first partition plate 211 and the second partition plate 212 to slide, so that the raw material is intermittently and quantitatively fed to between the push plate 213 and the material control plate 214, the push plate 213 controls the ball valve 236 to make the nozzle 224 spray acid when the end of the push plate 213 slides on the bottom of the material control plate 214, so that the top and bottom of the raw material can be acidified, thereby improving the uniformity of the raw material acidification, thereby improving the acidification effect.

[0087] The push plate 213 pushes the mixture of raw materials and acid liquid into the acid preparation cylinder 1, the stirring tube 312 drives the stirring plate 313 to stir the raw materials and the acid liquid, and the transmission plate 322 drives the stirring plate 313 to tilt through the sliding rod 323, the telescopic tube 327 and the rack 326, so that the stirring plate 313 can convey the mixture of raw materials and acid liquid, thereby extending the stirring time of the raw materials and the acid liquid, and enabling the raw materials and the acid liquid to be gradually discharged from the discharge pipe 13 during the intermittent conveying process.

[0088] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A furfural production acid feeding device, characterized in that: include: The acid preparation cylinder (1) has a feed pipe (11) fixedly inserted into the side wall near one end thereof, the feed pipe (11) being connected to a storage hopper (12), and the feed pipe (11) being located at the side wall at one end of the acid preparation cylinder (1) and being connected to the acid preparation cylinder (1); The acid dispensing assembly (2) comprises a material control section (21), an acid dispensing section (22) and a ball valve (236); the material control section (21) comprises a first baffle (211), a second baffle (212), a push plate (213) and a material control plate (214); the acid dispensing section (22) comprises an acid liquid pipe (221), a first branch pipe (222), a second branch pipe (223) and a nozzle (224); in, The first partition plate (211) and the second partition plate (212) are both slidably arranged on the feed pipe (11) and are arranged in sequence in a direction close to the acid preparation cylinder (1). The push plate (213) is arranged on one end of the feed pipe (11) located inside the acid preparation cylinder (1). One end of the push plate (213) is connected to a hinge shaft (2131) and is hinged to the side wall of the feed pipe (11) through the hinge shaft (2131). The hinge shaft (2131) is close to the feed pipe (11) and is connected to the side wall of the feed pipe (11). The material control plate (214) is arranged on the side wall opposite to the connection point of the acid preparation cylinder (1), the material control plate (214) is bent into an arc shape and is fixedly arranged at the connection point between the feed pipe (11) and the acid preparation cylinder (1), one end of the push plate (213) away from the hinge shaft (2131) abuts against the material control plate (214), one end of the push plate (213) away from the hinge shaft (2131) is slidably connected to the material control plate (214) along the arc surface of the material control plate (214), and the push plate (213) is arranged to be inclined vertically downward; The first partition (211) and the push plate (213) are both hollow inside. One end of the acid liquid pipe (221) is used for the acid liquid to flow in, and the other end is connected to the first branch pipe (222) and the second branch pipe (223). The first branch pipe (222) is connected to the inside of the first partition (211), and the second branch pipe (223) is connected to the inside of the push plate (213). Two groups of nozzles (224) are provided, and the number of nozzles (224) in each group is multiple. The first group of nozzles (224) are all embedded in the side of the first partition (211) close to the push plate (213) and are connected to the inside of the first partition (211). The second group of nozzles (224) are all embedded in the side of the push plate (213) close to the first partition (211) and are connected to the inside of the push plate (213); In the process of the end of the push plate (213) sliding from the top end to the bottom end of the material control plate (214), the first partition (211) gradually closes the feed pipe (11), and the second partition (212) gradually opens the feed pipe (11); in the process of the end of the push plate (213) sliding from the bottom end to the top end of the material control plate (214), the first partition (211) gradually opens the feed pipe (11), and the second partition (212) gradually closes the feed pipe (11); when the push plate (213) slides in the bottom area of ​​the material control plate (214), the acid is sprayed out from the nozzle (224); When the push plate (213) swings, it can synchronously drive the first partition plate (211) and the second partition plate (212) to open and close the feed pipe (11) and synchronously control the opening and closing of the acid liquid pipe (221); When the end of the push plate (213) slides to the bottom of the material control plate (214), the ball valve (236) is connected to the acid liquid pipe (221).

2. The acid-mixing and feeding device for furfural production according to claim 1, characterized in that: The acid preparation component (2) further comprises an adjustment part (23), the adjustment part (23) comprising a first adjustment box (231), a first partition plate (232) and an adjustment plate (233), the first adjustment box (231) being fixedly arranged on the acid preparation cylinder (1), the push plate (213) being fixedly connected to the hinge shaft (2131), one end of the hinge shaft (2131) being rotated to pass through the feed pipe (11) and being rotated to pass through the first adjustment box (231), three first partition plates (232) being arranged and all being fixedly arranged in the first adjustment box (231), the three first partition plates (232) being used to separate the space between the first adjustment box (231) and the hinge shaft (2131) into an adjustment chamber (2321), a control plate chamber (2322) and an acid control chamber (2323), and the two first partition plates (232) of the adjustment chamber (2321) are both provided with a connecting hole (2324); The regulating plate (233) is located in the regulating cavity (2321), and one end of the regulating plate (233) is fixedly connected to the hinge shaft (2131). A first fluid medium flows between the space on the side of the regulating plate (233) close to the control plate cavity (2322) and the control plate cavity (2322). A second fluid medium flows between the space on the side of the regulating plate (233) close to the acid control cavity (2323) and the acid control cavity (2323). The regulating plate (233) is used to drive the first partition plate (211) and the second partition plate (212) to slide through the first fluid medium, and the regulating plate (233) is used to control the opening and closing of the acid liquid pipe (221) through the second fluid medium.

3. The acid-mixing and feeding device for furfural production according to claim 2, characterized in that: A first pipeline (2311) is connected to the side wall corresponding to the first adjustment box (231) and the control plate cavity (2322); the first pipeline (2311) is connected to an adjustable telescopic rod (234); the adjustable telescopic rod (234) is fixedly mounted on the feed pipe (11); the rodless cavity of the adjustable telescopic rod (234) is sealed; the rod cavity of the adjustable telescopic rod (234) is connected to the atmosphere; the rodless cavity of the adjustable telescopic rod (234) is connected to the first pipeline (2311); the first pipeline (2311) enables the first fluid medium in the control plate cavity (2322) to flow into the rodless cavity of the adjustable telescopic rod (234); and the movable end of the adjustable telescopic rod (234) is fixedly connected to the first partition plate (211) and the second partition plate (212).

4. The acid-mixing and feeding device for furfural production according to claim 2, characterized in that: The first regulating box (231) is connected to a second pipeline (2312) on the side wall corresponding to the acid control chamber (2323), the second pipeline (2312) is connected to a second regulating box (235), the second regulating box (235) is fixedly connected to a ball valve (236), the ball valve (236) is arranged on the acid liquid pipe (221), the valve stem of the ball valve (236) is rotated to penetrate into the second regulating box (235), the second regulating box (235) is provided with a second partition plate (237) and a swing plate (238), the second partition plate (237) and the swing plate (238) are The plate (238) separates the space between the second regulating box (235) and the valve stem of the ball valve (236) into two chambers, the second partition plate (237) is fixedly connected to the second regulating box (235), the swing plate (238) is fixedly connected to the valve stem of the ball valve (236), the second pipeline (2312) is connected to one of the chambers, the second pipeline (2312) can allow the second fluid medium in the acid control chamber (2323) to flow into the chamber, and an air hole (2351) connected to the atmosphere is opened on the side wall corresponding to the second regulating box (235) and the other chamber.

5. The acid-mixing and feeding device for furfural production according to claim 1, characterized in that: The acid preparation cylinder (1) is provided with a mixing and transporting assembly (3), which comprises a mixing portion (31) and a conversion portion (32). The mixing portion (31) is provided in the acid preparation cylinder (1) and is used to mix a mixture of raw materials and acid liquid. The conversion portion (32) is provided on the mixing portion (31) and is used to intermittently control the mixing portion (31) to transport the mixture of raw materials and acid liquid.

6. The acid-mixing and feeding device for furfural production according to claim 5, characterized in that: The stirring portion (31) comprises a motor (311), a stirring tube (312) and a stirring plate (313); the motor (311) is fixedly mounted on one end of the acid preparation tube (1) away from the feed tube (11); the stirring tube (312) is located in the acid preparation tube (1) and is connected to the output shaft of the motor (311); a plurality of stirring plates (313) are arranged along the circumference of the stirring tube (312); each group of stirring plates (313) comprises a plurality of stirring plates, which are arranged along the axial direction of the stirring tube (312); and the stirring plates (313) are connected to the stirring tube (312).

7. The acid-mixing and feeding device for furfural production according to claim 6, characterized in that: The conversion part (32) comprises a transmission shaft (321), a transmission plate (322), a sliding rod (323) and an adjusting shaft (324); the transmission shaft (321) is arranged inside the stirring tube (312) and is fixedly connected to the stirring tube (312); the transmission shaft (321) is coaxially fixedly connected to the output shaft of the motor (311); the transmission shaft (321) is reciprocatingly threadedly arranged on the transmission plate (322); the transmission plate (322) is slidably connected to the acid preparation cylinder (1) along the axial direction of the transmission shaft (321); A plurality of slide bars (323) are provided, and correspond one to one with a plurality of groups of stirring plates (313) provided along the circumference of the stirring tube (312); one end of the slide bar (323) is fixedly connected to the transmission plate (322) along the axial direction of the transmission shaft (321), and is rotationally connected to the transmission plate (322) around the axial direction of the transmission shaft (321); A plurality of adjusting shafts (324) are provided, and correspond one to one with the stirring plates (313). The adjusting shafts (324) are rotatably arranged on the stirring tube (312). One end of the adjusting shaft (324) located outside the stirring tube (312) is fixedly connected to the stirring plate (313). One end of the adjusting shaft (324) located inside the stirring tube (312) is coaxially fixedly connected to a transmission gear (325). All transmission gears (325) corresponding to each group of stirring plates (313) are commonly meshed with a rack (326). The rack (326) is slidably connected to the stirring tube (312). The rack (326) corresponds one to one with the sliding rod (323). The rack (326) and the sliding rod (323) are elastically telescopically connected.

8. The acid-mixing and feeding device for furfural production according to claim 7, characterized in that: A telescopic tube (327) is fixedly arranged between the rack (326) and the slide bar (323), a spring (328) is arranged inside the telescopic tube (327), and two ends of the spring (328) are respectively fixedly connected to two ends of the telescopic tube (327).

9. The acid-mixing and feeding device for furfural production according to claim 7, characterized in that: One end of the stirring plate (313) away from the stirring tube (312) is arc-shaped and abuts against the inner wall of the acid preparation cylinder (1). When the stirring plate (313) rotates and tilts, the arc-shaped end of the stirring plate (313) fits against the inner wall of the acid preparation cylinder (1).

10. The acid-mixing and feeding device for furfural production according to claim 6, characterized in that: The stirring tube (312) is connected to a transmission assembly (4), which comprises a first bevel gear (41), a second bevel gear (42), a reciprocating screw (43), a transmission block (44) and a transmission telescopic rod (45). The first bevel gear (41) is coaxially fixedly sleeved on the stirring tube (312), the second bevel gear (42) is meshed with the first bevel gear (41) and coaxially fixedly connected to the reciprocating screw (43), and the reciprocating screw (43) is rotated to rotate with the first bevel gear (41). The transmission block (44) is connected to the acid dispensing cylinder (1), the transmission block (44) is sleeved on the reciprocating screw (43) and is threadedly connected to the reciprocating screw (43), the transmission telescopic rod (45) is fixedly connected to the transmission block (44), the movable end of the transmission telescopic rod (45) is hinged with a slider (46), the slider (46) is slidably arranged in a sliding hole (2141) provided on the material control plate (214), and the slider (46) is fixedly connected to one end of the push plate (213) away from the hinge shaft (2131).

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