A heat exchanger with temperature regulation function for biogas production

Abstract

The present invention belongs to the technical field of heat exchange equipment, and specifically is a heat exchanger with a temperature regulating function for biogas production, comprising a heat exchange shell, a first rotating rod rotatably connected to the heat exchange shell, a tachometer wheel fixed to the first rotating rod, a second rotating rod rotatably connected to the heat exchange shell, a rotating disk fixed to the second rotating rod, a sliding rod uniformly distributed in the circumferential direction is slidably connected to the rotating disk, a threaded rod is threadedly connected to the heat exchange shell, a round table is fixed to the threaded rod, and the threaded rod is rotatably connected to an adjustment plate. The present invention adjusts the extension of the sliding rod by the rotation speed of the rotating disk driven by the tachometer wheel, and the sliding rod cooperates with the round table to adjust the position of the adjustment plate, and adjusts the steam heating space and the biogas heating space in the heat exchange shell according to the output of biogas, so that the biogas and steam cooperate to adjust the heating temperature of the cow dung slurry, while ensuring the heating effect of the cow dung slurry, saving the use of steam.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange equipment, and in particular relates to a heat exchanger with a temperature regulating function for biogas production. Background Art

[0002] Biogas is a mixed gas mainly composed of methane and carbon dioxide. The production of biogas is achieved through the biogas fermentation process, which takes place in an anaerobic environment and is catalyzed by a series of microbial reactions.

[0003] Common equipment at biogas production sites include regulating tanks, homogenizing tanks, heating tanks and biogas fermentation tanks. However, the existing heating tanks suffer from severe heat loss during heating. Before cow dung is used for fermentation, the dung needs to be evenly mixed and crushed in a homogenizing tank to form uniform dung slurry. The dung slurry enters the fermentation tank for fermentation after preheating. The gas produced by the fermentation tank also has heat. If the heat is not recycled, heat waste will also occur. If the produced biogas is used to preheat the cow dung slurry that has not yet entered the fermentation tank, the output of biogas is not stable. Therefore, if the produced biogas is used alone to heat the cow dung slurry, the effect is not ideal. Summary of the invention

[0004] The present invention provides a heat exchanger with a temperature regulating function for biogas production with an adjustable heat exchange range, so as to solve the problems raised in the background technology.

[0005] A heat exchanger with a temperature regulating function for biogas production comprises a heat exchange shell, the heat exchange shell is connected with a biogas input pipe, the biogas input pipe is connected with a fermentation tank, the heat exchange shell is also connected with a biogas output pipe, a steam input pipe and a steam output pipe, the steam input pipe is connected with a steam providing device, the heat exchange shell is fixed with a heat exchange pipe, and the heat exchange pipe is coiled layer by layer in the heat exchange shell, the two ends of the heat exchange pipe are respectively connected with a homogenization tank and a fermentation tank, the biogas input pipe, the biogas output pipe, the steam output pipe and the heat exchange pipe are all provided with electromagnetic valves, and the heat exchange shell is rotatably connected with a first heat exchanger rotatably connected with the biogas input pipe A rotating rod, the first rotating rod is fixedly connected to a tachometer wheel located in the biogas input pipe, the heat exchange shell is rotatably connected to a second rotating rod which is driven by a pulley belt with the first rotating rod, the second rotating rod is fixedly connected to a rotating disk, the rotating disk is slidably connected to sliding rods evenly distributed in the circumferential direction, a tension spring is arranged between the sliding rod and the rotating disk, the heat exchange shell is threadedly connected to a threaded rod, the threaded rod is fixedly connected to a frustum, the threaded rod is rotatably connected to an adjustment plate which is slidably connected to the heat exchange shell and the heat exchange tube, a torsion spring is arranged between the threaded rod and the adjustment plate, and the heat exchange shell is provided with a drainage adjustment mechanism and a flow state adjustment mechanism.

[0006] Preferably, the truncated cone is provided with grooves evenly distributed in the circumferential direction, and the grooves evenly distributed in the circumferential direction of the truncated cone are limitedly matched with the sliding rods evenly distributed in the circumferential direction.

[0007] Preferably, the diversion adjustment mechanism includes equidistant and evenly distributed first baffles, which are all fixed in the heat exchange shell, the first baffles are rotatably connected to the evenly distributed first guide blocks, the adjustment plate is fixed to the equidistant and evenly distributed second baffles, the second baffles are rotatably connected to the evenly distributed second guide blocks, and the heat exchange shell is provided with an adjustment component.

[0008] Preferably, the first guide blocks whose centers are in the same vertical direction are all fixedly connected by mounting rods, and the second guide blocks whose centers are in the same vertical direction are all fixedly connected by mounting rods.

[0009] Preferably, the adjustment assembly includes a limit rod, which is fixed in the heat exchange shell and has an inclined groove in it. The inclined groove of the limit rod is slidably connected with symmetrical and evenly distributed sliding blocks, which are hinged to the adjacent second guide block through a fixed rod. The adjustment plate is fixed with equidistantly distributed telescopic fixed blocks, which are slidably connected to the inclined groove of the limit rod.

[0010] Preferably, the inclined sliding groove of the limiting rod is inclined from both sides to the middle.

[0011] Preferably, the flow regulating mechanism includes a motor, which is fixed to the heat exchange shell through a mounting frame, the heat exchange shell is rotatably connected to a third rotating rod, the output shaft of the motor and the third rotating rod are driven by gears, the heat exchange shell is rotatably connected to a fourth rotating rod which is evenly distributed axially, the output shaft of the motor and the fourth rotating rod are driven by pulleys and belts, the third rotating rod and the fourth rotating rod are both rotatably connected to the heat exchange tube, the fourth rotating rod is fixed to a first guide plate which is evenly distributed circumferentially, the heat exchange shell is rotatably connected to a fifth rotating rod which is symmetrically distributed, the symmetrically distributed fifth rotating rods are driven by pulleys and belts, and the fifth rotating rod is fixed to a second guide plate which is evenly distributed circumferentially.

[0012] Preferably, the first guide plates evenly distributed axially and the second guide plates symmetrically distributed are located at different positions in the vertical direction, and the vertical distance between the two adjacent plates is equal to the vertical distance between two adjacent layers of the heat exchange tubes.

[0013] Preferably, the first guide plate and the second guide plate are both spiral-shaped, and the deflection angle at both ends is 180°, the thickness of the first guide plate gradually increases from the side close to the adjacent fourth rotating rod to the side away from the adjacent fourth rotating rod, and the thickness of the second guide plate gradually decreases from the side close to the adjacent fifth rotating rod to the side away from the adjacent fifth rotating rod.

[0014] Preferably, it also includes a residual heat exchange mechanism, which is arranged on the biogas input pipe. The residual heat exchange mechanism includes a heat exchange cylinder, which is connected to the steam output pipe, the heat exchange cylinder is fixed to the biogas input pipe, the heat exchange cylinder is fixed with a spiral plate, the biogas input pipe is fixed with the spiral plate, the heat exchange cylinder is connected with a discharge pipe, and the steam output pipe is fixed with a temperature tester.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adjusts the extension of the sliding rod by driving the rotating speed of the rotating disk through the speed measuring wheel, and the sliding rod cooperates with the round table to adjust the position of the adjusting plate, and adjusts the steam heating space and the biogas heating space in the heat exchange shell according to the output of biogas, so that the biogas and steam cooperate to adjust the heating temperature of the cow dung slurry, while ensuring the heating effect of the cow dung slurry, saving the use of steam; the first baffle plate and the second baffle plate are staggered, and cooperate with the first guide block and the second guide block to adjust the gas flow area, so that the biogas or steam flow path entering the heat exchange shell is shaped The serpentine flow channel prolongs the circulation time of biogas or steam in the heat exchange shell, and can fully heat the cow dung slurry in the heat exchange tube. The first guide plate and the second guide plate are staggered and matched with the shapes of the first guide plate and the second guide plate, so that the cow dung slurry in the heat exchange tube is stirred after a layer of heating, and the cow dung slurry in the middle and the surrounding of the heat exchange tube is exchanged, thereby improving the heating effect of the cow dung slurry; the heat exchange tube and the spiral plate cooperate to continue to use the remaining heat of the steam after the heat exchange is completed, thereby improving the heat utilization rate of the steam, thereby saving heating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the matching relationship between the sliding rod and the round table of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the positional relationship between the rotating disk and the sliding rod of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the positional relationship between the biogas input pipe and the speed measuring wheel of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the drainage regulating mechanism of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the position relationship between the heat exchange shell and the limiting rod of the present invention;

[0024] Figure 7It is a structural schematic diagram of the positional relationship between the second guide block and the sliding block of the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the heat exchange shell and the motor of the present invention;

[0026] Fig. 9 It is a structural schematic diagram of the flow pattern regulating mechanism of the present invention;

[0027] Fig.10 It is a structural schematic diagram of the positional relationship between the fourth rotating rod and the first guide plate of the present invention;

[0028] Fig.11 It is a structural schematic diagram of the positional relationship between the fifth rotating rod and the second guide plate of the present invention;

[0029] Fig.12 It is a structural schematic diagram of the residual heat exchange mechanism of the present invention.

[0030] In the figure: 1, heat exchange shell; 2, biogas input pipe; 3, fermentation tank; 4, biogas output pipe; 5, steam input pipe; 6, steam output pipe; 7, heat exchange pipe; 8, first rotating rod; 9, speed measuring wheel; 10, second rotating rod; 11, rotating disk; 12, sliding rod; 13, threaded rod; 14, round table; 15, adjustment plate; 1601, first spoiler; 1602, first guide block; 1603, second spoiler ; 1604, second guide block; 1605, limit rod; 1606, sliding block; 1607, telescopic fixed block; 1701, motor; 1702, third rotating rod; 1704, fourth rotating rod; 1705, first guide plate; 1706, fifth rotating rod; 1707, second guide plate; 1801, heat exchange tube; 1802, spiral plate; 1803, discharge pipe; 1804, temperature tester. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] Embodiment 1: Figure 1-Figure 4As shown, a heat exchanger with temperature regulating function for biogas production comprises a heat exchange shell 1, the upper side of the heat exchange shell 1 is connected with a biogas input pipe 2, the right end of the biogas input pipe 2 is connected with a fermentation tank 3 for producing biogas, the lower side of the heat exchange shell 1 is connected with a biogas output pipe 4 for outputting the biogas after heat exchange, the upper side of the heat exchange shell 1 is connected with a steam input pipe 5 connected with a steam providing device, the lower side of the heat exchange shell 1 is connected with a steam output pipe 6, and the heat exchange shell 1 is fixed with a heat exchange pipe 7 for guiding the movement and heating of cow dung slurry. The heat exchange tube 7 is coiled layer by layer in the heat exchange shell 1, the upper end of the heat exchange tube 7 is connected to the external homogenizing tank, the lower end of the heat exchange tube 7 is connected to the fermentation tank 3, the biogas input pipe 2, the biogas output pipe 4, the steam output pipe 6 and the heat exchange tube 7 are all provided with solenoid valves, the upper side of the heat exchange shell 1 is rotatably connected with a first rotating rod 8, the first rotating rod 8 is rotatably connected to the biogas input pipe 2, the front end of the first rotating rod 8 is fixedly connected with a speed measuring wheel 9, the speed measuring wheel 9 is located in the biogas input pipe 2, and is used to monitor the flow rate of the biogas in the biogas input pipe 2. The heat exchange shell 1 is rotatably connected with a second rotating rod 10, and the first rotating rod 8 and the second rotating rod 10 are driven by a pulley belt. The rear end of the second rotating rod 10 is fixedly connected with a rotating disk 11, and the rotating disk 11 is slidably connected with a sliding rod 12 evenly distributed in the circumferential direction. A tension spring is arranged between the sliding rod 12 and the rotating disk 11, and is used to cooperate with the centrifugal force of the sliding rod 12 to control the sliding distance of the sliding rod 12. The rear side of the heat exchange shell 1 is threadedly connected with a threaded rod 13, and the rear end of the threaded rod 13 is fixedly connected with a round table 14, and the round table 14 is provided with concave grooves evenly distributed in the circumferential direction. The grooves evenly distributed around the truncated cone 14 are limitedly matched with the sliding rods 12 distributed around the truncated cone 14. The front end of the threaded rod 13 is rotatably connected to an adjustment plate 15 for adjusting the heat exchange area. The heat exchange shell 1 and the heat exchange tube 7 are both slidably connected to the adjustment plate 15. A torsion spring is arranged between the threaded rod 13 and the adjustment plate 15 for driving the adjustment plate 15 to reset through the threaded rod 13. A drainage adjustment mechanism for guiding the movement of airflow is arranged in the heat exchange shell 1. The heat exchange shell 1 is provided with a flow state adjustment mechanism for adjusting the flow state of cow dung slurry in the heat exchange tube 7.

[0036] When the present invention is used to preheat the cow dung slurry, the electromagnetic valves of the biogas input pipe 2, the biogas output pipe 4, the steam output pipe 6 and the heat exchange pipe 7 are opened at the same time, and then the biogas in the fermentation tank 3 enters the heat exchange shell 1 through the biogas input pipe 2, the external steam providing device enters the heat exchange shell 1 through the steam input pipe 5, and the cow dung slurry enters the heat exchange pipe 7. After entering the heat exchange pipe 7, the cow dung slurry moves downward layer by layer along with the heat exchange pipe 7. In this process, the steam and biogas synchronously heat the cow dung slurry through the heat exchange pipe 7, and the cow dung slurry heated in the heat exchange pipe 7 enters the fermentation tank 3 for fermentation.

[0037] In the process of biogas heating the cow dung slurry in the heat exchange tube 7, when the biogas in the biogas input pipe 2 flows into the heat exchange shell 1, the biogas drives the first rotating rod 8 to rotate through the speed measuring wheel 9, and the first rotating rod 8 drives the second rotating rod 10 to rotate through the pulley and the belt, and the second rotating rod 10 drives the sliding rod 12 to rotate through the rotating disk 11, and the sliding rod 12 drives the threaded rod 13 to rotate through the round table 14, and the threaded rod 13 and the heat exchange shell 1 thread cooperate to drive the adjustment plate 15 to move backward, and twist the torsion spring between the threaded rod 13 and the adjustment plate 15, and the threaded rod 13 drives the round table 14 to move backward until the round table 14 loses the cooperation with the sliding rod 12, and the torsion spring between the threaded rod 13 and the adjustment plate 15 drives the threaded rod 13 and the round table 14 to move forward until the round table 14 and the sliding rod 12 are re-coordinated, and the round table 14 drives the adjustment plate 15 to move forward again through the threaded rod 13. In this process, the adjustment plate 15 moves back and forth slightly after the position adjustment in the heat exchange shell 1 is completed.

[0038] During the movement of the regulating plate 15 , the regulating plate 15 controls the drainage regulating mechanism to guide the biogas and steam entering the heat exchange shell 1 , so that the biogas and steam entering the heat exchange shell 1 can fully exchange heat with the cow dung slurry in the heat exchange tube 7 .

[0039] When heat is exchanged with the cow dung slurry in the heat exchange tube 7, if the biogas output in the fermentation tank 3 increases, the pressure in the fermentation tank 3 increases due to the unchanged diameter of the biogas input pipe 2, and the biogas flow rate entering the biogas input pipe 2 increases. The speed measuring wheel 9 is driven to rotate by the biogas, and the rotation speed of the speed measuring wheel 9 is also increased. The speed measuring wheel 9 drives the rotating disk 11 and the circumferentially evenly distributed sliding rods 12 to rotate through the first rotating rod 8, the second rotating rod 10, the pulley and the belt. The rotation speed of the circumferentially evenly distributed sliding rods 12 increases, the centrifugal force of the sliding rods 12 increases, the sliding rods 12 slide outward and stretch the tension spring between the rotating disk 11 and the sliding rods 12. In this process, the sliding rods 12 drive the round table 14 to move backward continuously until the sliding rods 12 lose the cooperation with the round table 14, so that the space between the front side of the adjustment plate 15 and the heat exchange shell 1 increases. The utility model relates to a heat exchanger 3, which is a heat exchanger 3 having a large heat exchange capacity and a large heat exchanger 3 having a large heat exchange capacity. The heat exchanger 3 has a large heat exchange capacity and a large heat exchanger 3 has ...

[0040] Embodiment 2: Figure 4-Figure 7 As shown, on the basis of the first embodiment, the diversion adjustment mechanism includes equidistant and uniformly distributed first baffles 1601 for guiding the airflow, the equidistant and uniformly distributed first baffles 1601 are all fixedly connected to the inner side of the heat exchange shell 1, the inner side of the first baffle 1601 is rotatably connected with a uniformly distributed first guide block 1602, the deflection angle of the first guide block 1602 is adjusted as needed to change the flow state of the first baffle 1601, the front and rear sides of the adjustment plate 15 are fixedly connected with uniformly distributed second baffles 1603, the interior of the second baffle 1603 is rotatably connected with a uniformly distributed second guide block 1604, which is used to change the flow state of the second baffle 1603, the heat exchange shell 1 is provided with an adjustment component, the first guide blocks 1602 whose centers are in the same vertical direction are all fixedly connected by mounting rods, and the second guide blocks 1604 whose centers are in the same vertical direction are all fixedly connected by mounting rods.

[0041] like Figure 6 and Figure 7 As shown, the adjustment component includes a limit rod 1605, which is fixed to the inner side of the heat exchange shell 1, and an inclined slide groove is arranged in the limit rod 1605, and the inclined slide groove of the limit rod 1605 is inclined from the front and rear sides to the middle, and the front and rear sides of the inclined slide groove of the limit rod 1605 are slidably connected with evenly distributed sliding blocks 1606, and the sliding block 1606 is hinged to the adjacent second guide block 1604 through a fixed rod, so as to change the deflection angle of the sliding block 1606 at different positions, and the inside of the adjustment plate 15 is fixed with equidistantly distributed telescopic fixed blocks 1607, and the telescopic fixed block 1607 is slidably connected to the inclined slide groove of the limit rod 1605.

[0042] like Figure 8-Figure 11As shown, the flow state regulating mechanism includes a motor 1701, which is fixed to the front side of the heat exchange shell 1 through a mounting frame for providing power. The front side of the heat exchange shell 1 is rotatably connected to a third rotating rod 1702, and the output shaft of the motor 1701 is driven by the third rotating rod 1702 through gears. The front side of the heat exchange shell 1 is rotatably connected to three fourth rotating rods 1704 evenly distributed in the axial direction, and the output shaft of the motor 1701 is driven by a pulley and a belt to the fourth rotating rod 1704. The adjacent fourth rotating rods 1704 are driven by a pulley and a belt. The third rotating rod 1702 and the fourth rotating rod 1704 are both rotatably connected to the heat exchange tube 7, and the fourth rotating rod 1704 is fixed with three first guide plates 1705 evenly distributed in the circumferential direction for changing the flow state of the cow dung slurry. The heat exchange shell 1 is rotatably connected to two symmetrically distributed fifth rotating rods 1706, the two fifth rotating rods 1706 are driven by pulleys and belts, the fifth rotating rod 1706 is fixedly connected with three second guide plates 1707 uniformly distributed in the circumferential direction, the first guide plates 1705 uniformly distributed in the axial direction and the second guide plates 1707 symmetrically distributed are in different positions in the vertical direction, and the vertical distance between the two adjacent ones is equal to the vertical distance between two adjacent layers of the heat exchange tube 7 in the vertical direction, the first guide plate 1705 and the second guide plate 1707 are both spiral, and the deflection angles at the front and rear ends are 180°, the thickness of the first guide plate 1705 gradually increases from the side close to the adjacent fourth rotating rod 1704 to the side away from the adjacent fourth rotating rod 1704, and the thickness of the second guide plate 1707 gradually decreases from the side close to the adjacent fifth rotating rod 1706 to the side away from the adjacent fifth rotating rod 1706.

[0043] When the biogas and steam heat the cow dung slurry through the heat exchange tube 7, the deflection angle of the first guide block 1602 is first adjusted to minimize the deflection angle of the first guide block 1602 close to the front or rear side of the heat exchange shell 1. As the distance from the front or rear side of the heat exchange shell 1 increases, the deflection angle of the first guide block 1602 also increases, so that the biogas or steam entering the heat exchange shell 1 flows toward the middle of the heat exchange shell 1, guiding the flow path of the biogas or steam to improve the heating effect on the heat exchange tube 7. When the adjustment plate 15 moves backward, the adjustment plate 15 drives the evenly distributed sliding blocks 1606 to move obliquely to the rear through the evenly distributed second baffles 1603 and the second guide blocks 1604. In the process of moving toward the oblique rear, the evenly distributed sliding blocks 1606 move toward the oblique rear. The fixed rod drives the second baffle plate 1603 to rotate in the same axial direction. Since the middle part of the inclined groove in the limit rod 1605 is the deepest, during this process, the closer the second guide block 1604 is to the adjustment plate 15, the larger the deflection angle is, so that the air circulation area is larger near the adjustment plate 15, and the biogas or steam entering the heat exchange shell 1 is guided, and the cow dung slurry in the heat exchange tube 7 is fully heated. The first baffle plate 1601 and the second baffle plate 1603 are arranged in an alternating manner, and the first guide block 1602 and the second guide block 1604 adjust the gas circulation area, so that the biogas or steam flow channel entering the heat exchange shell 1 forms a serpentine flow channel, which prolongs the circulation time of the biogas or steam in the heat exchange shell 1 and can fully heat the cow dung slurry in the heat exchange tube 7.

[0044] Since the cow dung slurry is a solid-liquid mixture, when the cow dung slurry in the heat exchange tube 7 flows, the heating effect of the cow dung slurry located in the middle of the tube is poor. When the cow dung slurry is heated by the heat exchange tube 7, the motor 1701 is started, and the output shaft of the motor 1701 drives the evenly distributed fourth rotating rod 1704 to rotate through the pulley and the belt, and the fourth rotating rod 1704 drives the first guide plate 1705 to rotate, and the output shaft of the motor 1701 drives the third rotating rod 1702 to reverse through the gear transmission, and the third rotating rod 1702 drives the upper and lower fifth rotating rods 1706 to reverse through the pulley and the belt, and the fifth rotating rod 1706 drives the second guide plate 1707 to reverse.

[0045] When the cow dung slurry enters the heat exchange tube 7 for heating, the cow dung slurry is first heated by the top layer, and then contacts the top first guide plate 1705. The thickness of the first guide plate 1705 gradually increases from the side close to the adjacent fourth rotating rod 1704 to the side away from the adjacent fourth rotating rod 1704, and the thickness of the second guide plate 1707 gradually decreases from the side close to the adjacent fifth rotating rod 1706 to the side away from the adjacent fifth rotating rod 1706, and the deflection angles at both ends are 180°. Therefore, when the first guide plate 1705 rotates, the cow dung slurry around the inner tube wall of the heat exchange tube 7 moves toward the middle of the heat exchange tube 7 under the guidance of the first guide plate 1705, and the cow dung slurry entering between the two adjacent first guide plates 1705 is also deflected by the first guide plate 1705, thereby improving the heat exchange performance of the heat exchange tube 7. The heating and mixing effect of the cow dung slurry is improved; similarly, when the cow dung slurry flows downward to the left side of the second layer, the cow dung slurry contacts the second guide plate 1707, and the three second guide plates 1707 reverse to drive the cow dung slurry in the middle to move toward the inner tube wall of the heat exchange tube 7, further improving the heating and mixing effect of the cow dung slurry. Similarly, at the end of each layer of the lower layer, the cow dung slurry will be mixed and heated until all the cow dung slurry is heated. Then, the motor 1701 is turned off, and the first guide plate 1705 and the second guide plate 1707 are staggered and distributed in combination with the shapes of the first guide plate 1705 and the second guide plate 1707, so that the cow dung slurry in the heat exchange tube 7 is stirred after one layer of heating, and the cow dung slurry in the middle and around the heat exchange tube 7 are interchanged, thereby improving the heating effect of the cow dung slurry.

[0046] Embodiment 3: Figure 2 and Fig.12 As shown, on the basis of Example 2, it also includes a waste heat exchange mechanism for reusing the waste heat of steam. The waste heat exchange mechanism is arranged on the outside of the biogas input pipe 2. The waste heat exchange mechanism includes a heat exchange cylinder 1801 for circulating steam. The heat exchange cylinder 1801 is connected to the steam output pipe 6. The heat exchange cylinder 1801 is fixedly connected to the outside of the biogas input pipe 2. A spiral plate 1802 is fixedly connected to the inside of the heat exchange cylinder 1801 for improving the heating effect of steam on biogas. The outside of the biogas input pipe 2 is fixedly connected to the spiral plate 1802. The right side of the heat exchange cylinder 1801 is connected to a discharge pipe 1803; the steam output pipe 6 is fixedly connected to a temperature tester 1804 for monitoring the temperature of the discharged steam.

[0047] When using steam to heat the cow dung slurry, the steam after the heat exchange is completed enters the steam output pipe 6, and the temperature tester 1804 monitors the temperature of the steam in the steam output pipe 6 after the heat exchange is completed. If the steam temperature is higher than the biogas temperature, the solenoid valves of the steam output pipe 6 and the discharge pipe 1803 are opened, and the steam in the steam output pipe 6 enters the heat exchange cylinder 1801. After entering the heat exchange cylinder 1801, the steam rotates and moves upward along the spiral plate 1802, and in this process, the biogas in the biogas input pipe 2 is continuously heated. After the heating is completed, the steam is discharged through the discharge pipe 1803, and the remaining heat of the steam after the heat exchange is completed is continuously utilized through the cooperation of the heat exchange cylinder 1801 and the spiral plate 1802, thereby improving the heat utilization rate of the steam and saving the heating cost.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchanger with temperature regulation function for biogas production, characterized in that: The invention comprises a heat exchange shell (1), wherein the heat exchange shell (1) is connected to a biogas input pipe (2), the biogas input pipe (2) is connected to a fermentation tank (3), the heat exchange shell (1) is also connected to a biogas output pipe (4), a steam input pipe (5) and a steam output pipe (6), the steam input pipe (5) is connected to a steam supply device, the heat exchange shell (1) is fixedly connected to a heat exchange pipe (7), and the heat exchange pipe (7) is coiled layer by layer in the heat exchange shell (1), the two ends of the heat exchange pipe (7) are respectively connected to a homogenization tank and a fermentation tank (3), the biogas input pipe (2), the biogas output pipe (4), the steam output pipe (6) and the heat exchange pipe (7) are all provided with solenoid valves, and the heat exchange shell (1) is rotatably connected to a first rotating rod (8) rotatably connected to the biogas input pipe (2), the first rotating rod (8) is fixedly connected to a first rotating rod (8) located on the biogas input pipe (2) ), the heat exchange shell (1) is rotatably connected to a second rotating rod (10) which is driven by a pulley belt with the first rotating rod (8), the second rotating rod (10) is fixedly connected to a rotating disk (11), the rotating disk (11) is slidably connected to a sliding rod (12) which is evenly distributed in the circumferential direction, a tension spring is arranged between the sliding rod (12) and the rotating disk (11), the heat exchange shell (1) is threadedly connected to a threaded rod (13), the threaded rod (13) is fixedly connected to a frustum (14), the frustum (14) is a tapered frustum structure, the threaded rod (13) is rotatably connected to an adjustment plate (15) which is slidably connected to the heat exchange shell (1) and the heat exchange tube (7), a torsion spring is arranged between the threaded rod (13) and the adjustment plate (15), and the heat exchange shell (1) is provided with a drainage adjustment mechanism and a flow state adjustment mechanism; The truncated table (14) is provided with grooves evenly distributed in the circumferential direction, and the grooves evenly distributed in the circumferential direction of the truncated table (14) are limitedly matched with the sliding rods (12) evenly distributed in the circumferential direction.

2. The heat exchanger with temperature regulating function for biogas production according to claim 1, characterized in that: The flow control mechanism comprises equidistant and evenly distributed first flow control plates (1601), the equidistant and evenly distributed first flow control plates (1601) are all fixedly connected in the heat exchange shell (1), the first flow control plates (1601) are rotatably connected to evenly distributed first flow guide blocks (1602), the control plate (15) is fixedly connected to equidistant and evenly distributed second flow control plates (1603), the second flow control plates (1603) are rotatably connected to evenly distributed second flow guide blocks (1604), and the heat exchange shell (1) is provided with a control component.

3. The heat exchanger with temperature regulating function for biogas production according to claim 2, characterized in that: The first guide blocks (1602) whose centers are in the same vertical direction are all fixedly connected via mounting rods, and the second guide blocks (1604) whose centers are in the same vertical direction are all fixedly connected via mounting rods.

4. The heat exchanger with temperature regulating function for biogas production according to claim 2, characterized in that: The adjustment component comprises a limit rod (1605), the limit rod (1605) is fixedly connected to the heat exchange shell (1), an inclined slide groove is arranged in the limit rod (1605), symmetrical and evenly distributed sliding blocks (1606) are slidably connected in the inclined slide groove of the limit rod (1605), the sliding block (1606) is hinged to the adjacent second guide block (1604) through the fixed rod, and the adjustment plate (15) is fixedly connected to equidistantly distributed telescopic fixed blocks (1607), and the telescopic fixed blocks (1607) are slidably connected to the inclined slide groove of the limit rod (1605).

5. The heat exchanger with temperature regulating function for biogas production according to claim 4, characterized in that: The inclined slide groove of the limiting rod (1605) is inclined from both sides to the middle.

6. The heat exchanger with temperature regulating function for biogas production according to claim 1, characterized in that: The flow state regulating mechanism comprises a motor (1701), the motor (1701) is fixedly connected to the heat exchange shell (1) via a mounting frame, the heat exchange shell (1) is rotatably connected to a third rotating rod (1702), the output shaft of the motor (1701) and the third rotating rod (1702) are driven by gears, the heat exchange shell (1) is rotatably connected to a fourth rotating rod (1704) evenly distributed in the axial direction, the output shaft of the motor (1701) and the fourth rotating rod (1704) are driven by pulleys and belts, the third rotating rod (1702) and the fourth rotating rod (1704) are both rotatably connected to the heat exchange tube (7), the fourth rotating rod (1704) is fixedly connected to a first guide plate (1705) evenly distributed in the circumferential direction, the heat exchange shell (1) is rotatably connected to a fifth rotating rod (1706) evenly distributed in the circumferential direction, the symmetrically distributed fifth rotating rods (1706) are driven by pulleys and belts, and the fifth rotating rod (1706) is fixedly connected to a second guide plate (1707) evenly distributed in the circumferential direction.

7. The heat exchanger with temperature regulating function for biogas production according to claim 6, characterized in that: The first flow guide plates (1705) uniformly distributed axially and the second flow guide plates (1707) distributed symmetrically are located at different positions in the vertical direction, and the distance between the two adjacent flow guide plates in the vertical direction is equal to the distance between two adjacent layers of the heat exchange tubes (7) in the vertical direction.

8. The heat exchanger with temperature regulating function for biogas production according to claim 6, characterized in that: The first guide plate (1705) and the second guide plate (1707) are both spiral-shaped, and the deflection angles at both ends are 180 degrees. The thickness of the first guide plate (1705) gradually increases from the side close to the adjacent fourth rotating rod (1704) to the side away from the adjacent fourth rotating rod (1704), and the thickness of the second guide plate (1707) gradually decreases from the side close to the adjacent fifth rotating rod (1706) to the side away from the adjacent fifth rotating rod (1706).

9. The heat exchanger with temperature regulating function for biogas production according to claim 1, characterized in that: It also comprises a residual heat exchange mechanism, which is arranged on the biogas input pipe (2), and comprises a heat exchange cylinder (1801), the heat exchange cylinder (1801) is connected to the steam output pipe (6), the heat exchange cylinder (1801) is fixedly connected to the biogas input pipe (2), the heat exchange cylinder (1801) is fixedly connected to a spiral plate (1802), the biogas input pipe (2) is fixedly connected to the spiral plate (1802), the heat exchange cylinder (1801) is connected to a discharge pipe (1803), and the steam output pipe (6) is fixedly connected to a temperature tester (1804).

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