Furfural residue conveying system for furfural production

Abstract

The invention provides a furfural residue conveying system for furfural production, and relates to the technical field of furfural residue conveying, the furfural residue conveying system comprises a rack, the two opposite sides of the upper end of the rack are fixedly connected with side plates respectively; the upper end of a feeding port of the spiral conveying cylinder fixedly communicates with a feeding box, and the upper end and the lower end of the feeding box are provided with a feeding port and a discharging port correspondingly. The spiral conveying cylinder is horizontally sleeved with a plurality of fixing rings at intervals in the length direction of the spiral conveying cylinder, a heating sleeve is detachably connected between every two adjacent fixing rings, a spiral conveying rod is rotationally arranged in the spiral conveying cylinder, and the spiral conveying rod is driven by a first motor; the lower end of the furfural residue crushing and screening device is connected with the side plate, and a discharging port in the lower end of the furfural residue crushing and screening device is located over a feeding port of the feeding box. The furfural residue conveying device solves the following problems in the prior art: 1, furfural residues are conveyed on a belt, and the conveying efficiency is easily influenced due to material scattering or material sticking; and 2, a device for crushing and screening the furfural residues is lacked, so that the particle size of the furfural residues cannot meet the requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of furfural residue transportation, and specifically to a furfural residue transportation system for furfural production. Background Art

[0002] Furfural residue is one of the biomass wastes (such as corncobs, rice husks, cottonseed hulls, etc.). It is a waste product after a chemical raw material furfural is obtained by hydrolyzing agricultural and sideline products, and is generally used as fertilizer or fuel. At present, during the production process in factories, it is necessary to transport furfural residue;

[0003] Existing furfural residue transportation devices, such as a furfural residue transportation improvement device in CN222833569U, have the following problems:

[0004] 1. When furfural residue is transported on a conveyor belt, the transportation efficiency is easily affected by material scattering or sticking;

[0005] 2. There is a lack of a device for crushing and screening furfural residue, and it is impossible to ensure that the particle size of furfural residue meets the requirements. Summary of the Invention

[0006] The present invention provides a furfural residue transportation system for furfural production to solve at least one of the technical problems raised in the above background art.

[0007] To solve the above technical problems, the present invention discloses a furfural residue transportation system for furfural production, including:

[0008] A frame, with side plates fixedly connected to opposite sides of the upper end of the frame;

[0009] A spiral conveying cylinder, the upper end of the feeding port of the spiral conveying cylinder is fixedly communicated with a feeding box, and the upper and lower ends of the feeding box are respectively provided with a feeding port and a discharging port; along the length direction of the spiral conveying cylinder, a number of fixing rings are horizontally sleeved at intervals, and a heating sleeve is detachably connected between two adjacent fixing rings. A spiral conveying rod is rotatably arranged in the spiral conveying cylinder and is driven by a first motor;

[0010] A furfural residue crushing and screening device, the lower end of the furfural residue crushing and screening device is connected to the side plate, and the discharging port at the lower end of the furfural residue crushing and screening device is located directly above the feeding port of the feeding box.

[0011] Preferably, it further includes:

[0012] A fixed shell, fixedly connected to one side of the two side plates on the discharging side of the spiral conveying cylinder. The discharging side of the spiral conveying cylinder penetrates into the fixed shell, the discharging port of the spiral conveying cylinder is connected to a discharging pipe, and the smooth shaft part of the spiral conveying rod is rotatably connected to the fixed shell.

[0013] Preferably, it further includes:

[0014] A sliding plate is slidably sleeved on the optical axis portion, the sliding plate is slidably connected to the side wall of the fixed shell, and the side of the sliding plate close to the discharge pipe is connected to the wheel body through a bracket;

[0015] The telescopic rod is parallel to the optical axis part and is used to push the sliding plate to slide so that the wheel body hits the discharge pipe.

[0016] Preferably, the furfural slag crushing and screening device comprises:

[0017] The shell has a support fixedly connected to the periphery of the lower end of the shell, and the support is detachably connected to the connecting side plate. A discharge pipe is provided at the lower end of the shell;

[0018] Two sets of crushing rollers are spaced apart from each other, with the left and right ends of the crushing rollers being rotatably connected to the left and right inner walls of the shell respectively. Gears are fixedly connected to the two crushing rollers, and the gears on the two crushing rollers are meshed;

[0019] The drive box is fixedly connected to the left or right side of the housing. A second motor is provided in the drive box. The second optical axis of a crushing roller rotates and passes through the drive box. The second optical axis is driven by the second motor.

[0020] A horizontal rod, both ends of which are rotatably connected to the inner walls of the left and right sides of the housing, a portion of the horizontal rod is located in the drive box, the horizontal rod is connected to the second optical axis through a transmission mechanism, the horizontal rod is fixedly connected to the upper end of the first spring through a plurality of support rods, and a sphere is connected to the lower end of the spring; the plurality of support rods correspond to the plurality of springs one by one;

[0021] The screen, the lower ends of the left and right sides of the screen are respectively connected to the upper ends of the support blocks through support springs, one support block is fixedly connected to the inner wall of the shell, and the other support block is fixedly connected to the telescopic end of the upper end of the vertical electric telescopic rod, and the fixed end of the lower end of the vertical electric telescopic rod is fixedly connected to the lower part of the shell. A collecting box is set on the side of the shell away from the drive box, and the feed port of the collecting box is connected to the upper end of the screen.

[0022] Preferably, the transmission mechanism is a belt transmission mechanism.

[0023] Preferably, the furfural residue crushing and screening device further comprises:

[0024] A high-pressure gas inlet pipe runs through one side of the drive box of the shell, the screen is provided with channels in the left and right directions, and the mesh holes of the screen are connected to the channels; when the vertical electric telescopic rod is in the initial position, the high-pressure gas inlet pipe is located above the air inlet of the channel.

[0025] Preferably, the furfural residue crushing and screening device further comprises:

[0026] The upper end of the vertical rod is fixedly connected to the lower end of the screen through a second spring, and convex blocks are respectively provided on the left and right sides of the lower part of the vertical rod;

[0027] Two sets of left - right symmetric elastic components. The left - hand elastic component includes: an inclined rod that slides through the left inner wall of the discharge pipe obliquely. The upper end of the inclined rod is vertically fixed with a block, and the block is connected to the left inner wall of the discharge pipe by a third spring. In the initial state, the left side of the left - hand convex block is located above and to the left of the right side of the block.

[0028] Preferably, the heating jacket is hollow inside and is heated by a fluid. Each heating jacket is provided with a fluid inlet pipe and a fluid outlet pipe, and a control valve is arranged on the fluid inlet pipe.

[0029] Preferably, the heating jacket is hollow inside and is heated by a fluid. Each heating jacket is provided with a fluid inlet pipe and a fluid outlet pipe, and a control valve is arranged on the fluid inlet pipe.

[0030] Preferably, the furfural residue conveying system for furfural production further includes: a spiral conveyor barrel conveying evaluation device, and the spiral conveyor barrel conveying evaluation device includes:

[0031] Acquisition module one: used to obtain the target surface temperature range of the spiral conveyor barrel that meets the heating requirements of the current type of furfural residue under the benchmark conveying conditions of the current type of furfural residue.

[0032] The benchmark conveying conditions of the current type of furfural residue are: the target rotation speed of the first motor corresponding to the current type of furfural residue, and the single - time conveying volume of the current type of furfural residue.

[0033] Acquisition module two: used to obtain the standard fluid parameters of each heating jacket corresponding to each first surface temperature in the target surface temperature range and the standard parameters of the furfural residue after drying corresponding to each first surface temperature under the benchmark conveying conditions of the current type of furfural residue. The parameters of the furfural residue after drying include: the moisture content of the furfural residue and the surface temperature of the furfural residue.

[0034] Control module: When the current batch of furfural residue is conveyed through the spiral conveyor barrel, under the benchmark conveying conditions of the current type of furfural residue, the control module controls the heating jacket to perform initial heating work with the standard fluid parameters of each heating jacket corresponding to the first surface temperature closest to the median value of the target surface temperature range.

[0035] Detection module one: used to periodically detect the parameters of the furfural residue after drying at the discharge port of the spiral conveyor barrel during the operation of the spiral conveyor barrel.

[0036] Detection module two: used to periodically detect the surface temperature of the spiral conveyor barrel in the heating area of each heating jacket of the spiral conveyor barrel (3) during the operation of the spiral conveyor barrel.

[0037] Calculation module one: used to calculate the initial moisture content deviation degree and the initial surface temperature deviation degree of the furfural residue based on the detection results of detection module one during the initial heating work.

[0038] Alarm module 1: used for giving a first alarm when any one of the moisture content deviation degree of furfural residue and the surface temperature deviation degree of furfural residue is not within the corresponding allowable range of deviation degrees;

[0039] Calculation module 2: used for calculating the surface temperature gradient coefficient and the temperature non-uniformity coefficient of the spiral conveyor cylinder based on the detection results of detection module 2 during the initial heating operation;

[0040] Alarm module 2: used for giving a second alarm when the surface temperature gradient coefficient and the temperature non-uniformity coefficient of the spiral conveyor cylinder are not within the corresponding preset ranges;

[0041] Preferably, the spiral conveyor cylinder conveying evaluation device further includes:

[0042] Calculation module 3: used for calculating the heating efficiency of each heating sleeve (6) based on detection module 2 and acquisition module 3;

[0043] Alarm module 3: used for giving a third alarm when the heating efficiency of any one heating sleeve is less than the preset value;

[0044] Acquisition module 3: used for acquiring the fluid velocity - standard surface temperature curve of the heating sleeve at the rated fluid temperature and different fluid velocities;

[0045] And used for acquiring the fluid temperature - standard surface temperature curve of the heating sleeve at the rated fluid velocity and different fluid temperatures;

[0046] Calculation module 4: used for calculating the target surface temperature of each heating sleeve based on the initial moisture content deviation degree of furfural residue, the initial surface temperature deviation degree of furfural residue, and the latest calculation results of calculation module 3 when alarm module 1, alarm module 2, and alarm module 3 do not give an alarm;

[0047] Screening module 1: used for screening the target fluid velocity corresponding to the average value of the target surface temperatures of all heating sleeves in the fluid velocity - standard surface temperature curve of the heating sleeve;

[0048] When there is a target fluid velocity, when the current batch of furfural residue is conveyed through the spiral conveyor cylinder in batches, the control module controls the heating sleeves to work at the target fluid velocity and the rated fluid temperature for each heating sleeve;

[0049] Screening module 2: used for screening the target fluid temperature corresponding to the average value of the target surface temperatures of all heating sleeves in the fluid temperature - standard surface temperature curve of the heating sleeve;

[0050] When there is no target fluid velocity and there is a target fluid temperature, when the current batch of furfural residue is conveyed through the spiral conveyor cylinder in batches, the control module controls the heating sleeves to work at the rated fluid velocity and the target fluid temperature for each heating sleeve.

[0051] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] The furfural residue (which may be pretreated furfural residue, such as cleaning pretreatment and preliminary drying pretreatment) first enters the furfural residue crushing and screening device, which crushes the massive furfural residue and screens the crushed material to select furfural residue with a suitable particle size.

[0054] After crushing and screening, the furfural residue falls through the discharge port at the bottom of the furfural residue crushing and screening device into the feed port of the feed box. Then, it enters the feed end of the spiral conveyor through the discharge port at the bottom of the feed box. Motor 1 drives the spiral conveyor rod to rotate. The thrust of the spiral conveyor rod's spiral blades propels the furfural residue axially along the spiral conveyor, achieving continuous conveyance of the furfural residue from the feed end of the spiral conveyor to the discharge end of the spiral conveyor.

[0055] The heating jacket (such as an electric heating jacket or a thermal oil heating jacket) provided on the outside of the spiral conveying barrel is heated by an external heat source (such as electricity or steam). The heating jacket heats the spiral conveying barrel to maintain the temperature inside the spiral conveying barrel within a set range. By heating and drying the furfural residue, the subsequent utilization of the furfural residue (such as as fuel) is facilitated.

[0056] Several retaining rings are spaced along the length of the spiral conveyor and connected to the side panels of the frame via bolts, ensuring that the spiral conveyor remains horizontal and stable during heating and operation, preventing displacement or deformation caused by vibration. The heating jacket (which can be divided into a detachable upper heating jacket and a lower heating jacket) adopts a detachable design (such as flange connection and bolt fixing). If a single heating jacket fails, it can be replaced independently without disassembling the entire spiral conveyor, reducing maintenance time.

[0057] The sealing design of the conveying cylinder reduces dust emission concentration and improves the working environment.

[0058] The present invention solves the following problems raised in the background art: the existing furfural residue conveying device, such as CN222833569U, an improved furfural residue conveying device, has:

[0059] 1. When furfural residue is transported on a belt, it is easy for it to scatter or stick, affecting the transport efficiency;

[0060] 2. There is a lack of equipment for crushing and screening furfural residue, which makes it impossible to ensure that the particle size of furfural residue meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0062] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0063] Figure 2 is a schematic diagram of the internal structure of the fixed shell of the present invention;

[0064] Figure 3 is a schematic diagram of the internal structure of the furfural residue crushing and screening device of the present invention;

[0065] Figure 4 is Figure 3 an enlarged schematic diagram of the structure of area A of

[0066] In the figure: 1, frame; 2, side plate; 3, spiral conveying cylinder; 4, feeding box; 5, fixing ring; 6, heating sleeve; 7, spiral conveying rod; 8, motor 1; 9, furfural residue crushing and screening device; 91, housing; 92, discharge pipe; 93, crushing roller; 94, spring 3; 95, drive box; 96, optical axis 2; 97, horizontal rod; 98, transmission mechanism; 99, spring 1; 910, support rod; 911, sphere; 912, screen; 9121, screen hole; 9122, channel; 913, support spring; 914, vertical electric telescopic rod; 915, collection box; 916, vertical rod; 917, motor 2; 918, convex block; 919, inclined rod; 920, block; 922, high-pressure gas inlet pipe; 923, support block; 924, spring 2; 10, discharge pipe; 11, fixed shell; 12, optical axis part; 13, sliding plate; 14, wheel body; 15, telescopic rod; 16, support column. Detailed implementation manners

[0067] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0068] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0069] The present invention provides the following embodiments:

[0070] Example 1, the present invention provides a furfural residue conveying system for furfural production, such as Figures 1 - 4 Shown, including:

[0071] The frame 1 has side panels 2 fixedly connected to opposite sides of the upper end of the frame 1;

[0072] The upper end of the feed port of the spiral conveying cylinder 3 is fixedly connected to the feed box 4, and the upper and lower ends of the feed box 4 are respectively provided with a feed port and a discharge port; the spiral conveying cylinder 3 is provided with a plurality of fixing rings 5 at horizontal intervals along its length direction, and a heating sleeve 6 is detachably connected between two adjacent fixing rings 5. A spiral conveying rod 7 is rotatably provided in the spiral conveying cylinder 3, and the spiral conveying rod 7 is driven by a motor 8; the spiral conveying rod 7 and the spiral conveying cylinder 3 are prior art, such as CN207196509U;

[0073] The furfural residue crushing and screening device 9 has a lower end connected to the side plate 2 , and a discharge port at the lower end of the furfural residue crushing and screening device 9 is located directly above the feed port of the feed box 4 .

[0074] The working principle and beneficial effects of the above technical solution are:

[0075] The furfural residue (which may be pretreated furfural residue, such as cleaning pretreatment and preliminary drying pretreatment) first enters the furfural residue crushing and screening device 9, which crushes the massive furfural residue and simultaneously screens the crushed material to select furfural residue of suitable particle size.

[0076] After being crushed and screened, the furfural residue falls into the feed inlet of the feed box 4 through the discharge port at the lower end of the furfural residue crushing and screening device 9, and enters the feed end of the spiral conveying cylinder 3 through the discharge port at the bottom of the feed box 4. The first motor 8 drives the spiral conveying rod 7 to rotate, and the furfural residue is pushed along the axis of the spiral conveying cylinder 3 by the thrust of the spiral blades of the spiral conveying rod 7, realizing the continuous conveying of the furfural residue from the feed end of the spiral conveying cylinder 3 to the discharge end of the spiral conveying cylinder 3.

[0077] The heating sleeve 6 (such as an electric heating sleeve or a heat transfer oil heating sleeve) sleeved outside the spiral conveying cylinder 3 is heated by an external heat source (such as electricity or steam), and the heating sleeve 6 heats the spiral conveying cylinder 3 to maintain the temperature inside the spiral conveying cylinder 3 within a set range. By heating and drying the furfural residue, it is convenient for subsequent utilization of the furfural residue (such as as a fuel).

[0078] A number of fixing rings 5 are arranged at intervals along the length direction of the spiral conveying cylinder 3. The fixing rings 5 are connected to the side plates 2 of the frame 1 by bolts to ensure that the spiral conveying cylinder 3 remains horizontally stable during heating and operation, and to avoid displacement or deformation caused by vibration. The heating sleeve 6 (which can be divided into an upper heating sleeve and a lower heating sleeve that are detachably connected) adopts a detachable design (such as flange connection or bolt fixation). When a single heating sleeve 6 fails, it can be replaced independently without disassembling the entire spiral conveying cylinder 3, reducing the maintenance time.

[0079] The sealed design of the spiral conveying cylinder 3 reduces the dust emission concentration and improves the working environment.

[0080] The present invention solves the following problems raised in the background art: for the existing furfural residue conveying devices, such as a furfural residue conveying improvement device in CN222833569U:

[0081] 1. When the furfural residue is conveyed on the belt, it is easy to affect the conveying efficiency due to material scattering or sticking;

[0082] 2. There is a lack of a device for crushing and screening the furfural residue, and it is impossible to ensure that the particle size of the furfural residue meets the requirements.

[0083] Example 2, on the basis of Example 1, as Figure 1 、 Figure 2 shown, further includes:

[0084] A fixed shell 11 is fixedly connected to one side of the two side plates 2 on the discharge side of the spiral conveying cylinder 3. The discharge side of the spiral conveying cylinder 3 penetrates into the fixed shell 11. The discharge port of the spiral conveying cylinder 3 is connected to a discharge pipe 10, and the optical axis portion 12 of the spiral conveying rod 7 is rotatably connected to the fixed shell 11.

[0085] Further includes:

[0086] The sliding plate 13 is sleeved on the optical axis part 12 in a sliding manner. The sliding plate 13 is slidably connected to the side wall of the fixed housing 11. One side of the sliding plate 13 close to the discharge pipe 10 is connected to the wheel body 14 through a bracket;

[0087] The telescopic rod 15 is parallel to the optical axis part 12. The telescopic rod 15 is used to push the sliding plate 13 to slide, so that the wheel body 14 impacts the discharge pipe 10.

[0088] The discharge pipe 10 can be connected to a material collection device.

[0089] The working principle and beneficial effects of the above technical solution are as follows:

[0090] The optical axis part 12 is a bladeless shaft section at the end of the screw conveyor 7, penetrates into the fixed housing 11 and is rotatably connected to the fixed housing 11 through a bearing, ensuring the stability of the screw conveyor 7 during rotation.

[0091] The sliding plate 13 is sleeved on the optical axis part 12 and can slide axially along the optical axis part 12. Its side is connected to the wheel body 14 (such as a metal roller or a rubber wheel) through a bracket. The position of the wheel body 14 is directly opposite to the outer wall of the discharge pipe 10. The telescopic rod 15 (such as a cylinder, a hydraulic cylinder or an electric push rod) is parallel to the optical axis part 12. When the telescopic rod 15 extends, the sliding plate 13 drives the wheel body 14 to move towards the discharge pipe 10, and the wheel body 14 impacts the outer wall of the discharge pipe 10; when the telescopic rod 15 retracts, the sliding plate 13 resets to complete one impact cycle.

[0092] When there is material accumulation or blockage in the discharge pipe 10 (which can be monitored by the pressure difference between the inside and outside of the discharge pipe 10 through a pressure sensor or judged by other means), the control system starts the telescopic rod 15 to periodically impact the discharge pipe (such as impacting once every 10 seconds).

[0093] The mechanical vibration generated by the wheel body 14 impacting the discharge pipe 10 is transmitted to the accumulated material inside through the pipe wall of the discharge pipe 10, breaking the friction and adhesion between the materials, loosening and falling off the blocked furfural residue, and restoring smooth discharge. The material of the wheel body 14 can be selected as rubber (low noise, suitable for ordinary blockages) or metal (high impact force, suitable for sticky caking blockages), and can be flexibly adjusted according to the working conditions.

[0094] When the discharge pipe 10 of the traditional conveying system is blocked, it needs to be manually disassembled and cleaned. The present invention uses an automatic impact mechanism to remove the blockage, eliminating the need for operators to contact the discharge pipe 10 in a high-temperature and dusty environment, reducing the risks of mechanical injury and dust inhalation, and meeting the industrial safety specifications. Moreover, the impact mechanism impacts through the wheel body 14 with controllable force, meeting different impact requirements and ensuring the blockage removal effect.

[0095] Example 3, on the basis of Example 1 or 2, such as Figure 1 、 Figure 3 、Figure 4 As shown, the furfural residue crushing and screening device 9 includes:

[0096] The housing 91 has a support 16 fixedly connected to the periphery of the lower end of the housing 91. The support 16 is detachably connected to the connecting side plate 2. A discharge pipe 92 is provided at the lower end of the housing 91.

[0097] Two sets of crushing rollers 93 are spaced apart from each other, and the left and right ends of the crushing rollers 93 are rotatably connected to the left and right inner walls of the shell 91 respectively. Gears are fixedly connected to the two crushing rollers 93, and the gears on the two crushing rollers 93 are meshed;

[0098] The drive box 95 is fixedly connected to the left or right side of the housing 91. A second motor 917 is provided in the drive box 95. The second optical axis 96 of a crushing roller 93 rotates and passes through the drive box 95. The second optical axis 96 is driven by the second motor 917.

[0099] Horizontal rod 97, both ends of which are rotatably connected to the left and right inner walls of housing 91, and part of horizontal rod 97 is located in drive box 95. Horizontal rod 97 is connected to optical axis 2 96 via transmission mechanism 98. Horizontal rod 97 is fixedly connected to the upper ends of springs 1 99 via a plurality of support rods 910, and a sphere 911 is connected to the lower end of springs 1 99; the plurality of support rods 910 corresponds one to one with the plurality of springs 1 99;

[0100] The screen 912, the lower ends on the left and right sides of the screen 912 are respectively connected to the upper ends of the support blocks 923 through support springs 913, one support block 923 is fixedly connected to the inner wall of the shell 91, and the other support block 923 is fixedly connected to the telescopic end of the upper end of the vertical electric telescopic rod 914, and the fixed end of the lower end of the vertical electric telescopic rod 914 is fixedly connected to the lower part of the shell 91. A collecting box 915 is set on the side of the shell 91 away from the drive box 95, and the feed port of the collecting box 915 is connected to the upper end of the screen 912.

[0101] The transmission mechanism is a belt transmission mechanism.

[0102] The furfural residue crushing and screening device 9 also includes:

[0103] The high-pressure gas inlet pipe 922 passes through the side of the shell 91 where the drive box 95 is set. The screen 912 is provided with a channel 9122 in the left and right directions. The mesh holes 9121 of the screen 912 are connected to the channel 9122. When the vertical electric telescopic rod 914 is in the initial position, the high-pressure gas inlet pipe 922 is located above the air inlet of the channel 9122.

[0104] The furfural residue crushing and screening device 9 also includes:

[0105] Vertical rod 916, the upper end of the vertical rod 916 is fixedly connected to the lower end of the screen 912 through spring 2 924, and protrusions 918 are respectively provided on the left and right sides of the lower part of the vertical rod 916;

[0106] There are two groups of left-right symmetrical elastic components. The elastic component on the left side includes: an inclined rod 919, which slides obliquely through the left inner wall of the discharge pipe 92. A block 920 is vertically fixed on the upper end of the inclined rod 919. The block 920 is connected to the left inner wall of the discharge pipe 92 through a spring three 94; in the initial state, the left side of the left protrusion 918 is located at the upper left of the right side of the block 920.

[0107] The working principle and beneficial effects of the above technical solution are:

[0108] 1. Furfural residue (which may have undergone pretreatment, such as cleaning and preliminary drying) first enters the housing 91. Two sets of crushing rollers 93 within the housing 91 rotate simultaneously through gear meshing (this is prior art, see CN118847271A). Once the furfural residue is fed through the feed port at the top of the housing 91, it is crushed by the squeezing and shearing forces between the two crushing rollers 93. Motor 2 917 drives the optical axis 2 96 of one crushing roller 93, which, through gear meshing, drives the other crushing roller 93 to rotate synchronously in the opposite direction, forming a crushing operation zone. This gear transmission ensures precise matching of the two roller speeds, enabling stable processing of furfural residues of varying moisture levels.

[0109] The crushed furfural residue falls to the screen 912. At this time, the horizontal rod 97 rotates in conjunction with the optical axis 2 96 through the belt transmission mechanism 98, driving the spring 1 99 and the ball 911 on the support rod 910 to do circular motion. The ball 911 periodically hits the upper surface of the screen 912 (at this time, Figure 3 As shown, two support blocks 923 are at the same height, causing screen 912 to vibrate at high frequencies, improving screening efficiency. Spring 1 99 connects sphere 911 to support rod 910, providing elastic cushioning when sphere 911 strikes screen 912, preventing fatigue damage caused by rigid impact. Multiple spheres 911 can be installed to break up large furfural residue particles on screen 912, ensuring a high pass rate for screen 912.

[0110] The above-mentioned two sets of crushing rollers 93 can be rotated synchronously and the balls 911 can periodically hit the upper surface of the screen 912 through the one driving member of the motor 2 917, which is easy to control and more energy-saving.

[0111] 2. First aspect: When the mesh 9121 of the screen 912 needs to be cleared or there are a lot of large particles of furfural residue accumulated on the screen 912, Figure 3On the basis of this, control the vertical electric telescopic rod 914 to extend upward, driving the support block 923 on the left side to move upward, adjusting the inclination angle of the screen 912, so that the screen 912 is higher on the left and lower on the right. The large particle furfural residues move from left to right along the surface of the screen 912. The large particle furfural residues enter the collection box 915 through the screen 912 (and can be poured back into the housing 91), and the qualified particles fall below the screen 912 through the screen holes 9121.

[0112] Second aspect: When the vertical electric telescopic rod 914 extends upward, driving the support block 923 on the left side to move upward, the channel 9122 can be connected to the high-pressure gas inlet pipe 922, enabling high-pressure gas to enter the screen holes 9121, performing pressure dredging on the screen holes 9121, removing the furfural residue particles blocked in the screen holes 9121, and avoiding the screen blockage from affecting the screening efficiency; and when high-pressure gas is not needed, the high-pressure gas inlet pipe 922 is closed by the screen 912, which is more energy-saving. The high-pressure gas blockage cleaning system can remove the blockage in the screen holes in a short time, reducing the downtime compared with manual cleaning.

[0113] Third aspect: When it is necessary to clear the blockage of the discharge pipe 92, the vertical electric telescopic rod 914 shortens downward, driving the screen 912 to move downward. The screen 912 drives the vertical rod 916 and the convex block 918 to move downward. The vertical rod 916 and the convex block 918 can achieve downward movement and dredging of the discharge pipe 92. Moreover, the convex block 918 will contact the block 920 at the upper end of the inclined rod 919, and can squeeze the block 920, causing the block 920 to impact the side wall of the discharge pipe 92, accelerating the discharging of the discharge pipe 92.

[0114] The above realizes the functions of the above three aspects through a single vertical electric telescopic rod 914, which is convenient to control and more energy-saving.

[0115] Embodiment 4, on the basis of any one of Embodiments 1-3, the heating sleeve 6 is hollow inside, and the heating sleeve 6 is heated by a fluid. Each heating sleeve 6 is provided with a fluid inlet pipe and a fluid outlet pipe, and a control valve is provided on the fluid inlet pipe;

[0116] The furfural residue conveying system for furfural production further includes: a conveying evaluation device for the spiral conveying cylinder 3, and the conveying evaluation device for the spiral conveying cylinder 3 includes:

[0117] Acquisition module one: used to acquire the target surface temperature range of the spiral conveying cylinder 3 that meets the heating requirements of the current type of furfural residue under the benchmark conveying conditions of the current type of furfural residue;

[0118] The benchmark conveying conditions of the current type of furfural residue are: the target rotation speed of the first motor 8 corresponding to the current type of furfural residue, and the single conveying amount of the current type of furfural residue (feeding the spiral conveying cylinder 3 at a preset feeding flow rate until the spiral conveying cylinder 3 starts to discharge, and then stopping continuous feeding);

[0119] Acquisition module 2: used to obtain the standard fluid parameters of each heating jacket 6 corresponding to each first surface temperature in the target surface temperature range under the current furfural-like slag baseline conveying conditions, and the standard furfural slag drying parameters corresponding to each first surface temperature, the furfural slag drying parameters including: furfural slag moisture content and furfural slag surface temperature; the current batch of furfural slag belongs to the current furfural slag product, but the actual moisture content may be slightly different;

[0120] Control module: when the current batch of furfural slag is conveyed through the spiral conveyor 3, under the current baseline conveying conditions of the furfural-like slag, the control module controls the heating jackets 6 to perform initial heating with the standard fluid parameters of each heating jacket 6 corresponding to the first surface temperature closest to the median of the target surface temperature range;

[0121] Detection module 1: used to periodically detect the parameters of the furfural residue after drying at the outlet of the spiral conveyor 3 during the operation of the spiral conveyor 3;

[0122] Detection module 2: used for periodically detecting the surface temperature of the spiral conveying cylinder 3 in each heating area of the heating sleeve 6 of the spiral conveying cylinder 3 during the operation of the spiral conveying cylinder 3;

[0123] Calculation module 2: used to calculate the initial furfural slag moisture content deviation and the initial furfural slag surface temperature deviation based on the detection results of detection module 1 during the initial heating work;

[0124] Alarm module 1: used to issue a first alarm when either the furfural residue moisture content deviation or the furfural residue surface temperature deviation is outside the corresponding allowable deviation range;

[0125] Detection module 2: used to calculate the surface temperature gradient coefficient and temperature unevenness coefficient of the spiral conveying cylinder 3 based on the detection results of the detection module 2 during the initial heating operation;

[0126] Alarm module 2: used to issue a second alarm when the surface temperature gradient coefficient and temperature unevenness coefficient of the spiral conveying cylinder 3 are not within the corresponding preset ranges.

[0127] Wherein: Calculation module 1 is calculated based on the following formula:

[0128]

[0129] Among them, Q1 and Q2 are the initial furfural slag moisture content deviation and initial furfural slag surface temperature deviation, respectively; B1 and C1 are the average values of furfural slag moisture content and furfural slag surface temperature obtained by the detection module 1 during the initial heating process, respectively; B 10 、C 10They are the standard moisture content of furfural residue and the standard surface temperature of furfural residue after drying, corresponding to the first surface temperature closest to the median value of the target surface temperature range, respectively.

[0130] Calculation module two calculates based on the following formula:

[0131]

[0132] H2 = σ1;

[0133] H1 and H2 are the surface temperature gradient coefficient and temperature non-uniformity coefficient of the spiral conveyor cylinder 3 respectively, and T i1 They are the average values of the surface temperature of the spiral conveyor cylinder 3 in the heating area of the i-th heating sleeve 6 detected by detection module two during the initial heating operation; T (i-1)1 They are the average values of the surface temperature of the spiral conveyor cylinder 3 in the heating area of the (i - 1)-th heating sleeve 6 detected by detection module two during the initial heating operation; min is the minimum value; max is the maximum value; σ1 is the standard deviation of the average values of the surface temperature of the spiral conveyor cylinder 3 in the heating areas of all heating sleeves 6 detected by detection module two during the initial heating operation; M is the total number of heating sleeves on the spiral conveyor cylinder 3; μ1 and μ2 are the first gradient evaluation weight and the second gradient evaluation weight (both are taken as greater than 0 and less than 1, and can be taken as 0.4 and 0.6 respectively).

[0134] The conveying evaluation device of the spiral conveyor cylinder 3 further includes:

[0135] Calculation module three: used to calculate the heating efficiency of each heating sleeve 6 based on detection module two and acquisition module three;

[0136]

[0137] K i is the heating efficiency of the i-th heating sleeve 6; T0 is the first surface temperature closest to the median value of the target surface temperature range;

[0138] Alarm module three: used to give a third alarm when the heating efficiency of any heating sleeve 6 is less than the preset value;

[0139] Acquisition module three: used to obtain the fluid velocity - standard surface temperature curve of the heating sleeve 6 at the rated fluid temperature and different fluid velocities;

[0140] And used to obtain the fluid temperature - standard surface temperature curve of the heating sleeve 6 at the rated fluid velocity and different fluid temperatures;

[0141] Calculation Module Four: When Alarm Module One, Alarm Module Two, and Alarm Module Three do not give an alarm, calculate the target surface temperature of each heating sleeve 6 based on the initial moisture content deviation of the furfural residue, the initial surface temperature deviation of the furfural residue, and the latest calculation result of Calculation Module Three.

[0142]

[0143] T i0 is the target surface temperature of the i-th heating sleeve 6; K i1 is the latest obtained heating efficiency of the i-th heating sleeve 6;

[0144] Screening Module One: Used to screen the target fluid flow rate corresponding to the average value of the target surface temperatures of all heating sleeves 6 in the fluid flow rate - standard surface temperature curve of the heating sleeve 6. are the first deviation weight and the second deviation weight (each value is less than 1, and can be 0.65 and 0.35 respectively);

[0145] When there is a target fluid flow rate, when the current batch of furfural residue is conveyed in batches through the spiral conveyor tube 3, the control module controls the heating sleeve 6 to work at the target fluid flow rate and the rated fluid temperature for each heating sleeve 6.

[0146] Screening Module Two: Used to screen the target fluid temperature corresponding to the average value of the target surface temperatures of all heating sleeves 6 in the fluid temperature - standard surface temperature curve of the heating sleeve 6.

[0147] When there is no target fluid flow rate and there is a target fluid temperature, when the current batch of furfural residue is conveyed in batches through the spiral conveyor tube 3, the control module controls the heating sleeve 6 to work at the rated fluid flow rate and the target fluid temperature for each heating sleeve 6.

[0148] The fluid in the present invention is the heating fluid of the heating sleeve 6. A heating fluid circulation pipe can be wound around the heating sleeve 6 or the interior of the heating sleeve 6 is hollow, and the heating fluid flows through it;

[0149] The data source of the target surface temperature range: historical production records, process requirements, or experimental tests.

[0150] Experimental test: In the laboratory environment, based on the initially used conveying system, control the rotation speed of Motor One 8 and the single conveying volume (determined according to the drying efficiency and the stability of conveying the furfural residue, etc.), gradually adjust the surface temperature of the spiral conveyor tube 3, and record the drying effect of the furfural residue at different temperatures.

[0151] Process verification: Determine the minimum and maximum temperatures that meet the drying requirements (such as the moisture content requirement range), and form the target surface temperature range of the spiral conveyor cylinder 3. Database storage: Associate the target surface temperature range of the spiral conveyor cylinder 3 with the furfural residue type (such as corn cob residue, rice husk residue), and store it in the system database.

[0152] Standard fluid parameter and post-drying parameter test conditions: Under the benchmark conveying conditions, test each first surface temperature within the target surface temperature range of the spiral conveyor cylinder 3 (determined according to the preset temperature selection interval, or select the integer value of the target temperature range).

[0153] The heating effect of the heating area of the corresponding spiral conveyor cylinder 3 under the standard fluid parameters of each heating jacket 6 corresponding to the first surface temperature (the average surface temperature of the heating area of the corresponding spiral conveyor cylinder 3 is within the preset range of the corresponding first surface temperature, which can be ±0.5) meets the requirements; it can be determined based on experimental tests, relevant data is detected, and the data is associated: Establish a three-dimensional data table (first surface temperature → fluid parameter → post-drying parameter) to form a control benchmark.

[0154] Method for obtaining the fluid velocity - standard surface temperature curve of the heating jacket 6 at the rated fluid temperature and different fluid velocities: Test conditions: Keep the fluid temperature constant (such as 170 °C), and adjust the fluid velocity (such as 5 L / min, 10 L / min, 15 L / min). Record the surface temperatures of each heating jacket 6 after reaching the stable state at different fluid velocities. Curve fitting is performed to generate the fluid velocity - standard surface temperature curve of the heating jacket 6 (the abscissa is the fluid velocity, and the ordinate is the standard surface temperature of the heating jacket 6).

[0155] Method for obtaining the fluid temperature - standard surface temperature curve of the heating jacket 6 at the rated fluid velocity and different fluid temperatures: Test conditions: Keep the fluid velocity constant (such as 10 L / min), and adjust the temperature (such as 150 °C, 160 °C, 170 °C, 180 °C, 190 °C, 200 °C, 210 °C). Record the surface temperatures of each heating jacket 6 after reaching the stable state at different fluid temperatures. Curve fitting is performed to generate the fluid temperature - standard surface temperature curve of the heating jacket 6.

[0156] Database construction: Store the two groups of curves in the system database as the basis for subsequent parameter screening.

[0157] The beneficial effects of the above technical solution are:

[0158] By dynamically adjusting the fluid parameters (temperature, fluid velocity) of the heating jacket 6, it is ensured that the surface temperature of the spiral conveyor cylinder 3 is uniform and stable, avoiding local overheating or underheating, improving the drying efficiency of furfural residue, and reducing energy waste.

[0159] The control module conducts the initial heating work test when the current batch of furfural residues is conveyed through the spiral conveyor cylinder 3. Based on the real-time detected drying parameters (moisture content, surface temperature), it automatically optimizes the heating strategy, reduces manual intervention, and lowers the operating cost. The product quality is stable. By monitoring and controlling the moisture content and surface temperature of the furfural residues, the consistency of the product quality after drying is ensured, and the process stability of furfural production is improved. The calculation and alarm mechanism of the temperature gradient coefficient and the temperature non-uniformity coefficient can promptly detect and correct the uneven heating problem, avoiding product quality fluctuations caused by abnormal local temperatures.

[0160] Equipment health monitoring calculates the heating efficiency of the heating jacket 6, identifies the heating units with low efficiency, gives early warnings of potential faults, and reduces equipment maintenance costs and downtime. Through the multi-dimensional alarm mechanism (moisture content deviation, temperature non-uniformity, heating efficiency), the operating status of the system is comprehensively monitored, improving safety and reliability.

[0161] Summary of the system operation process: Initial stage: Set heating parameters based on benchmark conditions, and detect the initial drying effect and temperature distribution. Evaluation stage: Calculate the deviation degree, gradient coefficient, non-uniformity coefficient, and heating efficiency, and trigger alarms or adjustments. Optimization stage: According to the evaluation results, automatically screen and adjust the fluid parameters (flow rate or temperature).

[0162] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A furfural residue conveying system for furfural production, characterized in that: include: A frame (1), wherein side panels (2) are fixedly connected to opposite sides of the upper end of the frame (1); A spiral conveying cylinder (3) is provided, wherein the upper end of the feed port of the spiral conveying cylinder (3) is fixedly connected to the feed box (4), and the feed port and the discharge port are respectively provided at the upper and lower ends of the feed box (4); a plurality of fixing rings (5) are provided on the spiral conveying cylinder (3) at intervals along the length thereof, and a heating sleeve (6) is detachably connected between two adjacent fixing rings (5); a spiral conveying rod (7) is rotatably provided in the spiral conveying cylinder (3), and the spiral conveying rod (7) is driven by a motor (8); The furfural residue crushing and screening device (9) is connected to the side plate (2) at its lower end, and the discharge port at the lower end of the furfural residue crushing and screening device (9) is located directly above the feed port of the feed box (4).

2. The furfural residue conveying system for furfural production according to claim 1, wherein: Also includes: A fixed shell (11) is fixedly connected to one side of the two side plates (2) located on the discharge side of the spiral conveying cylinder (3), the discharge side of the spiral conveying cylinder (3) passes through the fixed shell (11), the discharge port of the spiral conveying cylinder (3) is connected to the discharge pipe (10), and the optical axis part (12) of the spiral conveying rod (7) is rotatably connected to the fixed shell (11).

3. The furfural residue conveying system for furfural production according to claim 2, characterized in that: Also includes: A sliding plate (13) is slidably sleeved on the optical axis portion (12), the sliding plate (13) is slidably connected to the side wall of the fixed shell (11), and the side of the sliding plate (13) close to the discharge pipe (10) is connected to the wheel body (14) through a bracket; The telescopic rod (15) is parallel to the optical axis portion (12). The telescopic rod (15) is used to push the sliding plate (13) to slide, so that the wheel body (14) hits the discharge pipe (10).

4. A furfural residue conveying system for furfural production according to claim 1, characterized in that: The furfural residue crushing and screening device (9) comprises: A housing (91), a support (16) is fixedly connected to the circumference of the lower end of the housing (91), the support (16) is detachably connected to the connecting side plate (2), and a discharge pipe (92) is provided at the lower end of the housing (91); Two sets of crushing rollers (93) spaced apart from each other, the left and right ends of the crushing rollers (93) are rotatably connected to the left and right inner walls of the shell (91), the two crushing rollers (93) are respectively fixed with gears, and the gears on the two crushing rollers (93) are meshed; A drive box (95) is fixedly connected to the left or right side of the housing (91). A second motor (917) is provided in the drive box (95). A second optical axis (96) of a crushing roller (93) rotates and passes through the drive box (95). The second optical axis (96) is driven by the second motor (917). A horizontal rod (97), both ends of which are rotatably connected to the inner walls of the left and right sides of the housing (91), a portion of the horizontal rod (97) is located in the drive box (95), the horizontal rod (97) is connected to the optical axis 2 (96) through a transmission mechanism (98), the horizontal rod (97) is fixedly connected to the upper ends of the plurality of springs (99) through a plurality of support rods (910), and the lower ends of the springs (99) are connected to a sphere (911); the plurality of support rods (910) correspond one to one with the plurality of springs (99); The screen (912), the lower ends of the left and right sides of the screen (912) are respectively connected to the upper ends of the support blocks (923) through support springs (913). One support block (923) is fixedly connected to the inner wall of the housing (91), and the other support block (923) is fixedly connected to the telescopic end of the upper end of the vertical electric telescopic rod (914). The fixed end of the lower end of the vertical electric telescopic rod (914) is fixedly connected to the lower part of the housing (91). A collection box (915) is arranged on one side of the housing (91) away from the drive box (95). The feed inlet of the collection box (915) is communicated with the upper end of the screen (912).

5. A furfural residue conveying system for furfural production according to claim 4, characterized in that: The transmission mechanism is a belt transmission mechanism.

6. A furfural residue conveying system for furfural production according to claim 4, characterized in that: The furfural residue crushing and screening device (9) further includes: The high-pressure gas inlet pipe (922), the high-pressure gas inlet pipe (922) penetrates through the side of the housing (91) where the drive box (95) is arranged. The screen (912) is provided with a channel (9122) in the left-right direction, and the screen holes (9121) of the screen (912) are communicated with the channel (9122); when the vertical electric telescopic rod (914) is in the initial position, the high-pressure gas inlet pipe (922) is located above the air inlet of the channel (9122).

7. A furfural residue conveying system for furfural production according to claim 4, characterized in that: The furfural residue crushing and screening device (9) further includes: The vertical rod (916), the upper end of the vertical rod (916) is fixedly connected to the lower end of the screen (912) through the second spring (924). The left and right sides of the lower part of the vertical rod (916) are respectively provided with convex blocks (918); Two groups of left-right symmetric elastic components. The left elastic component includes: the inclined rod (919), the inclined rod (919) slides through the left inner wall of the discharge pipe (92) obliquely, the upper end of the inclined rod (919) is vertically fixedly provided with a block (920), and the block (920) is connected to the left inner wall of the discharge pipe (92) through the third spring (94); in the initial state, the left side of the left convex block (918) is located above the right side of the block (920).

8. A furfural residue conveying system for furfural production according to claim 1, characterized in that: The heating sleeve (6) is hollow inside, and the heating sleeve (6) is heated by a fluid. Each heating sleeve (6) is provided with a fluid inlet pipe and a fluid outlet pipe, and a control valve is arranged on the fluid inlet pipe.

9. A furfural residue conveying system for furfural production according to claim 8, characterized in that: It further includes: The screw conveyor cylinder (3) conveying evaluation device, which includes: The first acquisition module: used to acquire the target surface temperature range of the screw conveyor cylinder (3) that meets the heating requirements of the current type of furfural residue under the benchmark conveying conditions of the current type of furfural residue. The second acquisition module: used to acquire the standard fluid parameters of each heating sleeve (6) corresponding to each first surface temperature in the target surface temperature range, and the parameters of the furfural residue after drying corresponding to each first surface temperature under the benchmark conveying conditions of the current type of furfural residue. The parameters of the furfural residue after drying include: the moisture content of the furfural residue and the surface temperature of the furfural residue. The control module: when the current batch of furfural residue is conveyed through the screw conveyor cylinder (3), under the benchmark conveying conditions of the current type of furfural residue, the control module controls the heating sleeve (6) to perform initial heating work with the standard fluid parameters of each heating sleeve (6) corresponding to the first surface temperature closest to the median value of the target surface temperature range. The first detection module: used to periodically detect the parameters of the furfural residue after drying at the discharge port of the screw conveyor cylinder (3) during the working process of the screw conveyor cylinder (3). Detection Module 2: It is used to periodically detect the surface temperature of the screw conveyor cylinder (3) in the heating area of each heating sleeve (6) of the screw conveyor cylinder (3) during the operation of the screw conveyor cylinder (3). Calculation Module 1: It is used to calculate the initial moisture content deviation degree and the initial surface temperature deviation degree of the furfural residue based on the detection results of Detection Module 1 during the initial heating operation. Alarm Module 1: It is used to give a first alarm when any one of the moisture content deviation degree and the surface temperature deviation degree of the furfural residue is not within the corresponding allowable deviation range. Calculation Module 2: It is used to calculate the surface temperature gradient coefficient and the temperature non-uniformity coefficient of the screw conveyor cylinder (3) based on the detection results of Detection Module 2 during the initial heating operation.

10. A furfural residue conveying system for furfural production according to claim 9, characterized in that: Alarm Module 2: It is used to give a second alarm when the surface temperature gradient coefficient and the temperature non-uniformity coefficient of the screw conveyor cylinder (3) are not within the corresponding preset ranges. The reference conveying conditions for the current type of furfural residue are: the target rotation speed of the first motor (8) corresponding to the current type of furfural residue, and the single conveying amount of the current type of furfural residue. The screw conveyor cylinder (3) conveying evaluation device further includes: Calculation Module 3: It is used to calculate the heating efficiency of each heating sleeve (6) based on Detection Module 2 and Acquisition Module 3. Alarm Module 3: It is used to give a third alarm when the heating efficiency of any one heating sleeve (6) is less than the preset value. Acquisition Module 3: It is used to acquire the fluid velocity - standard surface temperature curve of the heating sleeve (6) at the rated fluid temperature and different fluid velocities; And it is used to acquire the fluid temperature - standard surface temperature curve of the heating sleeve (6) at the rated fluid velocity and different fluid temperatures. Calculation Module 4: When Alarm Module 1, Alarm Module 2, and Alarm Module 3 do not give an alarm, it is used to calculate the target surface temperature of each heating sleeve (6) based on the initial moisture content deviation degree and the initial surface temperature deviation degree of the furfural residue and the latest calculation results of Calculation Module 3. Screening Module 1: It is used to screen the target fluid velocity corresponding to the average value of the target surface temperatures of all heating sleeves (6) in the fluid velocity - standard surface temperature curve of the heating sleeve (6). When there is a target fluid velocity, when the current batch of furfural residue is conveyed in batches through the screw conveyor cylinder (3), the control module controls the heating sleeve (6) to work at the target fluid velocity and the rated fluid temperature for each heating sleeve (6). Screening Module 2: It is used to screen the target fluid temperature corresponding to the average value of the target surface temperatures of all heating sleeves (6) in the fluid temperature - standard surface temperature curve of the heating sleeve (6). When there is no target fluid velocity and there is a target fluid temperature, when the current batch of furfural residue is conveyed in batches through the screw conveyor cylinder (3), the control module controls the heating sleeve (6) to work at the rated fluid velocity and the target fluid temperature for each heating sleeve (6).

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