Superheated steam cracking tank

Abstract

The superheated steam cracking tank provided by the utility model comprises a tank body, a main shaft and a stirring assembly, the stirring assembly is connected to the lower end part of the main shaft, at least two first pressurized steam ports which are symmetrically distributed on two sides of the main shaft are formed in an upper elliptical head, and at least four second pressurized steam ports which are uniformly distributed along the axis of the tank body are formed in the tank body; the lower elliptical head is provided with at least two third pressurized steam ports which are symmetrically distributed on two sides of the discharge port, so that the pressurized steam ports are arranged more reasonably, high-pressure superheated steam can be fed into the tank body from multiple directions, materials in the tank body can be heated more uniformly, and the quality of the materials is improved. A stirring assembly comprises a cross-shaped support, a main stirring shaft which is connected to the lower surface of the support and is coaxial with a main shaft, an auxiliary stirring shaft spaced from the main stirring shaft, a spiral flow deflector connected to the outer wall of the main stirring shaft, and an inclined flow deflector connected to the bottom of the auxiliary stirring shaft, so that the main stirring shaft and the auxiliary stirring shaft can be driven to rotate through the support; and the spiral and inclined flow deflectors fully stir materials in the tank body.

Description

Technical Field

[0001] This utility model relates to the field of pyrolysis technology, specifically to a superheated steam pyrolysis tank. Background Technology

[0002] In rural areas, traditional animal husbandry is small-scale, and animal manure is mostly fermented and decomposed by entering septic tanks or directly applying it to the fields. However, with the development of animal husbandry, its scale is getting larger and larger, and the amount of animal manure that needs to be processed is also increasing. Traditional decomposition methods are no longer suitable. At the same time, the disposal of straw in the fields has also become a problem. In the past, it was disposed of by burning, but this pollutes the air. Afterwards, it was mostly piled up in the fields for natural fermentation and decomposition. This decomposition method is inefficient and easily causes secondary soil pollution. To solve this problem, pyrolysis tanks that use mixed animal manure and straw as raw materials to accelerate fermentation and decomposition through heating to produce organic fertilizer have appeared on the market. For example, Chinese patents CN112958010A and CN213569968U disclose such pyrolysis tanks. However, most of these pyrolysis tanks have the following problems:

[0003] 1. Poor heating uniformity results in uneven heating of the material inside the tank, leading to inconsistent fermentation and decomposition in different parts.

[0004] 2. The low degree of mixing of materials inside the tank makes it difficult to improve the quality of the final fertilizer. Utility Model Content

[0005] The purpose of this invention is to solve one or more problems in the prior art and to provide a superheated steam pyrolysis tank.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is a superheated steam pyrolysis tank, comprising:

[0007] The tank body includes an upper elliptical head, a cylindrical tank body, and a lower elliptical head connected sequentially from top to bottom. The upper elliptical head has an inlet at its eccentric position, and the lower elliptical head has an outlet at its center.

[0008] A main shaft is rotatably inserted into the tank body. The upper end of the main shaft is connected to a drive assembly for driving the main shaft to rotate. The lower end of the main shaft passes through the center of the upper elliptical head and extends downward.

[0009] A stirring assembly is located inside the tank body and the lower elliptical head, and the stirring assembly is connected to the lower end of the main shaft;

[0010] The upper elliptical end cap is provided with at least two first pressurized steam ports, which are symmetrically distributed on both sides of the main shaft. The tank body is provided with at least four second pressurized steam ports, which are evenly distributed along the axis of the tank body. The lower elliptical end cap is provided with at least two third pressurized steam ports, which are symmetrically distributed on both sides of the discharge port.

[0011] The stirring assembly includes a support, a main stirring shaft, an auxiliary stirring shaft, a spiral guide vane, and an inclined guide vane. The support is cross-shaped, with its center connected to the lower end of the main shaft. The main stirring shaft is connected to the lower surface of the support and is coaxial with the main shaft. The auxiliary stirring shaft is connected to the lower surface of the support and extends downward. The auxiliary stirring shaft is spaced apart from the main stirring shaft. The spiral guide vane is connected to the outer wall of the main stirring shaft, and the inclined guide vane is connected to the bottom of the auxiliary stirring shaft and spaced apart from the inner wall of the lower elliptical head.

[0012] Preferably, the distance between the centerline of the first pressurized steam port and the centerline of the tank body is greater than or equal to the distance between the centerline of the third pressurized steam port and the centerline of the tank body, and the height of the second pressurized steam port is lower than that of the support.

[0013] Preferably, the support includes a central sleeve and four triangular beams connected to the outer wall of the central sleeve. The central sleeve is fitted onto the lower end of the main shaft. The triangular beams are used to connect the auxiliary stirring shaft. One side of each triangular beam is perpendicular to its base, and the other side is an inclined plane. All the inclined planes are evenly distributed around the axis of the main shaft.

[0014] More preferably, the number of auxiliary stirring shafts connected to the bottom surfaces of adjacent triangular beams is different, and the distances between the centerlines of these auxiliary stirring shafts and the centerline of the tank body are not equal.

[0015] Preferably, the lower end of the main stirring shaft is recessed to form a narrow section located below the spiral guide vane. The outer wall of the narrow section is connected to an outwardly extending discharge stirring plate. The discharge stirring plate is inclined and pushes the material towards the discharge port when the main shaft rotates.

[0016] More preferably, the bottom of the narrow section is also connected to a conical guide shroud, which is a hollow shroud that extends into the discharge port.

[0017] Preferably, in the longitudinal section, the inclination direction of the inclined guide vane is parallel to the tangential direction of the lower elliptical head.

[0018] Preferably, the stirring assembly further includes a central guide vane disposed on the auxiliary stirring shaft. The central guide vane is inclined and is formed by flanges at the ends of two docking sections of the auxiliary stirring shaft.

[0019] Preferably, the upper elliptical end cap is further provided with an exhaust port, a thermometer connection port, a pressure gauge interface, a safety valve connection port, and a manhole. The distance between the centerlines of the exhaust port, thermometer connection port, pressure gauge interface, and safety valve connection port and the centerline of the tank body is equal to the distance between the centerline of the first pressurized steam port and the centerline of the tank body. The distance between the centerline of the manhole and the centerline of the tank body is greater than the distance between the centerline of the first pressurized steam port and the centerline of the tank body.

[0020] Preferably, the drive assembly includes a support frame connected to the upper elliptical head, a reducer mounted on the support frame, and a motor for driving the reducer. The output end of the reducer is connected to the upper end of the main shaft via a coupling.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0022] 1. By setting at least two first pressurized steam ports on the upper elliptical head, symmetrically distributed on both sides of the main shaft, setting at least four second pressurized steam ports on the tank body, evenly distributed along the axis of the tank body, and setting at least two third pressurized steam ports on the lower elliptical head, symmetrically distributed on both sides of the discharge port, the arrangement of the pressurized steam ports is more reasonable. High-pressure superheated steam can be sent into the tank from multiple directions, resulting in better heating uniformity, better heating uniformity of the material in the tank, and better consistency of fermentation and decomposition degree in different parts.

[0023] 2. By assembling a mixing component including a support, a main mixing shaft, an auxiliary mixing shaft, spiral guide vanes, and inclined guide vanes, the support is shaped like a cross. The center of the support is connected to the lower end of the main shaft. The main mixing shaft is connected to the lower surface of the support and is coaxial with the main shaft. The auxiliary mixing shaft is connected to the lower surface of the support and extends downwards, with the auxiliary mixing shaft spaced apart from the main mixing shaft. The spiral guide vanes are connected to the outer wall of the main mixing shaft, and the inclined guide vanes are connected to the bottom of the auxiliary mixing shaft and spaced apart from the inner wall of the lower elliptical head. When the main shaft rotates, the support drives the main mixing shaft and the auxiliary mixing shaft to rotate. This causes the spiral guide vanes to stir the material in the tank along the axial direction of the tank body, and the inclined guide vanes to stir the material along the axial and radial directions of the tank body. This ensures that the animal manure and straw in the material are mixed in all directions, greatly improving the uniformity of the mixture. Because the material is heated and mixed evenly, the efficiency of fermentation and decomposition is significantly improved, and the quality of the final fertilizer is enhanced. Attached Figure Description

[0024] Figure 1 This is a top view of a preferred embodiment of the present invention.

[0025] Figure 2 yes Figure 1 A partial cross-sectional view along the AA direction.

[0026] Figure 3 yes Figure 1 A partial cross-sectional view along the BB direction.

[0027] Figure 4 yes Figure 2 A three-dimensional schematic diagram of the stirring assembly is shown, with the spiral guide vanes omitted for easier observation.

[0028] The components are as follows: 10. Tank body; 11. Upper elliptical head; 111. Feed inlet; 112. First pressurized steam port; 12. Tank body; 121. Second pressurized steam port; 13. Lower elliptical head; 131. Discharge port; 132. Third pressurized steam port; 14. Exhaust port; 15. Thermometer connection port; 16. Pressure gauge interface; 17. Safety valve connection port; 18. Manhole; 20. Main shaft; 30. Drive assembly; 31. Support frame; 32. Reducer; 33. Motor; 34. Coupling; 40. Stirring assembly; 41. Bracket; 411. Center sleeve; 412. Triangular beam; 413. Inclined surface; 42. Main stirring shaft; 421. Narrow diameter section; 422. Discharge stirring plate; 423. Conical guide shroud; 43. Auxiliary stirring shaft; 431. Central guide vane; 44. Spiral guide vane; 45. Angled guide vane. Detailed Implementation

[0029] like Figures 1 to 4As shown, the superheated steam pyrolysis tank provided by this utility model includes: a tank body 10, a main shaft 20, a drive assembly 30, and a stirring assembly 40. The tank body 10 includes an upper elliptical head 11, a cylindrical tank body 12, and a lower elliptical head 13 connected sequentially from top to bottom. An inlet 111 is provided at the eccentric part of the upper elliptical head 11, and an outlet 131 is provided at the center of the lower elliptical head 13. The main shaft 20 extends vertically and is rotatably inserted into the tank body 10. The upper end of the main shaft 20 protrudes from the upper elliptical head 11, and the lower end of the main shaft 20 points downwards. The drive assembly 30 extends downward through the center of the upper elliptical head 11; the drive assembly 30 is used to drive the main shaft 20 to rotate, and the drive assembly 30 includes a support frame 31 connected to the upper elliptical head 11, a reducer 32 mounted on the support frame 31, and a motor 33 for driving the reducer 32. The output end of the reducer 32 is connected to the upper end of the main shaft 20 through a coupling 34; the stirring assembly 40 is located inside the tank body 12 and the lower elliptical head 13, and the stirring assembly 40 is used to stir the materials consisting of animal manure, straw, etc. in the tank body 10. The stirring assembly 40 is connected to the main shaft 20. The lower end of the 0; the upper elliptical head 11 is provided with two first pressurized steam ports 112, which are symmetrically distributed on both sides of the main shaft 20; the tank body 12 is provided with four second pressurized steam ports 121, which are evenly distributed along the axis of the tank body 12; the lower elliptical head 13 is provided with two third pressurized steam ports 132, which are symmetrically distributed on both sides of the discharge port 131; the stirring assembly 40 includes a support 41, a main stirring shaft 42, an auxiliary stirring shaft 43, and a spiral guide vane 44. The inclined guide vane 45 and the support 41 are cross-shaped. The center of the support 41 is connected to the lower end of the main shaft 20. The main stirring shaft 42 is connected to the lower surface of the support 41 and is coaxial with the main shaft 20. The auxiliary stirring shaft 43 is connected to the lower surface of the support 41 and extends downward. The auxiliary stirring shaft 43 is spaced apart from the main stirring shaft 42. The spiral guide vane 44 is connected to the outer wall of the main stirring shaft 42. The inclined guide vane 45 is inclined and connected to the bottom of the auxiliary stirring shaft 43 and is spaced apart from the inner wall of the lower elliptical head 13. The spaced interval is 5-10 mm.

[0030] The advantage of this setting is that:

[0031] This allows for a more rational arrangement of the pressurized steam inlets, enabling the injection of high-pressure superheated steam into the tank from multiple directions. This improves heating uniformity, resulting in better heat uniformity of the materials within the tank and more consistent fermentation and decomposition of the materials in different parts. Furthermore, when the main shaft rotates, the support drives the main and auxiliary stirring shafts to rotate, causing the spiral guide vanes to agitate the materials within the tank along the axial direction, and the inclined guide vanes to agitate the materials along both the axial and radial directions. This ensures comprehensive mixing of animal manure and straw, significantly improving the uniformity of the mixture. Because the materials are heated and mixed evenly, the efficiency of fermentation and decomposition is greatly enhanced, leading to higher quality fertilizer.

[0032] In this embodiment, the distance between the centerline of the first pressurized steam port 112 and the centerline of the tank body 12 is greater than the distance between the centerline of the third pressurized steam port 132 and the centerline of the tank body 12, and the height of the second pressurized steam port 121 is lower than that of the support 41 to ensure the efficiency of superheated steam utilization.

[0033] In this embodiment, the support 41 includes a central sleeve 411 and four triangular beams 412 connected to the outer wall of the central sleeve. The central sleeve 411 is fitted onto the lower end of the main shaft 20. The triangular beams 412 are used to connect the auxiliary stirring shaft 43. One side of the triangular beam 412 is perpendicular to its bottom surface, and the other side is an inclined surface 413. All inclined surfaces 413 are evenly distributed around the axis of the main shaft 20.

[0034] In this embodiment, the number of auxiliary stirring shafts 43 connected to adjacent triangular beams 412 is different. Specifically, one auxiliary stirring shaft 43 is connected to one triangular beam 412, and two auxiliary stirring shafts 43 are connected to another triangular beam 412. The distances between the center lines of these three auxiliary stirring shafts 43 and the center line of the tank body 12 are not equal, so as to stir the materials located in different parts of the tank body 10.

[0035] In this embodiment, the lower end of the main stirring shaft 42 is recessed to form a narrow diameter section 421 located below the spiral guide vane 44. The outer wall of the narrow diameter section 421 is connected to an outwardly extending discharge stirring plate 422. The discharge stirring plate 422 is inclined and consists of three plates evenly distributed around the axis of the narrow diameter section 421. When the main shaft 20 rotates, the discharge stirring plate 422 pushes the material toward the discharge port 131. Furthermore, a conical guide shroud 423 is connected to the bottom of the narrow diameter section 421. The conical guide shroud 423 is a hollow shroud that extends into the discharge port.

[0036] In the longitudinal section, the inclined direction of the oblique guide vane 45 is parallel to the tangent direction of the lower elliptical head 13.

[0037] In this embodiment, the stirring assembly 40 further includes a central guide vane 431 disposed on the auxiliary stirring shaft 43. The central guide vane 431 is inclined and is composed of flanges at the ends of the two docking sections of the auxiliary stirring shaft 43.

[0038] In this embodiment, the upper elliptical head 11 is also provided with an exhaust port 14, a thermometer connection port 15, a pressure gauge interface 16, a safety valve connection port 17, and a manhole 18. The distance between the centerline of the exhaust port 14, the thermometer connection port 15, the pressure gauge interface 16, and the safety valve connection port 17 and the centerline of the tank body 12 is equal to the distance between the centerline of the first pressurized steam port 112 and the centerline of the tank body 12. The distance between the centerline of the manhole 18 and the centerline of the tank body 12 is greater than the distance between the centerline of the first pressurized steam port 112 and the centerline of the tank body 12.

[0039] It should be noted that the upper elliptical head 11 is also provided with several spare ports, and the outer wall of the tank body 10 is also provided with ear plates and other components that facilitate hoisting. These structures are all conventional in the field and will not be described in detail here.

[0040] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A superheated steam pyrolysis tank, comprising: The tank body includes an upper elliptical head, a cylindrical tank body, and a lower elliptical head connected sequentially from top to bottom. The upper elliptical head has an inlet at its eccentric position, and the lower elliptical head has an outlet at its center. A main shaft is rotatably inserted into the tank body. The upper end of the main shaft is connected to a drive assembly for driving the main shaft to rotate. The lower end of the main shaft passes through the center of the upper elliptical head and extends downward. A stirring assembly is located inside the tank body and the lower elliptical head, and the stirring assembly is connected to the lower end of the main shaft; Its features are: The upper elliptical end cap is provided with at least two first pressurized steam ports, which are symmetrically distributed on both sides of the main shaft. The tank body is provided with at least four second pressurized steam ports, which are evenly distributed along the axis of the tank body. The lower elliptical end cap is provided with at least two third pressurized steam ports, which are symmetrically distributed on both sides of the discharge port. The stirring assembly includes a support, a main stirring shaft, an auxiliary stirring shaft, a spiral guide vane, and an inclined guide vane. The support is cross-shaped, with its center connected to the lower end of the main shaft. The main stirring shaft is connected to the lower surface of the support and is coaxial with the main shaft. The auxiliary stirring shaft is connected to the lower surface of the support and extends downward. The auxiliary stirring shaft is spaced apart from the main stirring shaft. The spiral guide vane is connected to the outer wall of the main stirring shaft, and the inclined guide vane is connected to the bottom of the auxiliary stirring shaft and spaced apart from the inner wall of the lower elliptical head.

2. The superheated steam pyrolysis tank according to claim 1, characterized in that: The distance between the centerline of the first pressurized steam port and the centerline of the tank body is greater than or equal to the distance between the centerline of the third pressurized steam port and the centerline of the tank body, and the height of the second pressurized steam port is lower than that of the support.

3. The superheated steam pyrolysis tank according to claim 1, characterized in that: The support includes a central sleeve and four triangular beams connected to the outer wall of the central sleeve. The central sleeve is fitted onto the lower end of the main shaft. The triangular beams are used to connect the auxiliary stirring shaft. One side of each triangular beam is perpendicular to its base, and the other side is an inclined plane. All the inclined planes are evenly distributed around the axis of the main shaft.

4. The superheated steam pyrolysis tank according to claim 3, characterized in that: The number of auxiliary stirring shafts connected to the bottom surfaces of adjacent triangular beams is different, and the distances between the centerlines of these auxiliary stirring shafts and the centerline of the tank body are not equal.

5. The superheated steam pyrolysis tank according to claim 1, characterized in that: The lower end of the main stirring shaft is recessed to form a narrow section located below the spiral guide vane. The outer wall of the narrow section is connected to an outwardly extending discharge stirring plate. The discharge stirring plate is inclined and pushes the material toward the discharge port when the main shaft rotates.

6. The superheated steam pyrolysis tank according to claim 5, characterized in that: The bottom of the narrow section is also connected to a conical guide shroud, which is a hollow shroud that extends into the discharge port.

7. The superheated steam pyrolysis tank according to claim 1, characterized in that: In the longitudinal section, the inclination direction of the inclined guide vane is parallel to the tangent direction of the lower elliptical head.

8. The superheated steam pyrolysis tank according to claim 1, characterized in that: The stirring assembly also includes a central guide vane disposed on the auxiliary stirring shaft. The central guide vane is inclined and is formed by flanges at the ends of the two docking sections of the auxiliary stirring shaft.

9. The superheated steam pyrolysis tank according to claim 1, characterized in that: The upper elliptical head is also provided with an exhaust port, a thermometer connection port, a pressure gauge interface, a safety valve connection port, and a manhole. The distance between the centerline of the exhaust port, the thermometer connection port, the pressure gauge interface, and the safety valve connection port and the centerline of the tank body is equal to the distance between the centerline of the first pressurized steam port and the centerline of the tank body. The distance between the centerline of the manhole and the centerline of the tank body is greater than the distance between the centerline of the first pressurized steam port and the centerline of the tank body.

10. The superheated steam pyrolysis tank according to claim 1, characterized in that: The drive assembly includes a support frame connected to the upper elliptical head, a reducer mounted on the support frame, and a motor for driving the reducer. The output end of the reducer is connected to the upper end of the main shaft via a coupling.

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