Long-shaft dry type fermentation stirring machine with heating device

Abstract

The utility model belongs to the technical field of fermentation stirring, and discloses a long-shaft dry-type fermentation stirring machine with a heating device, which comprises a dry fermentation tank body, the dry fermentation tank body is provided with a material inlet and a discharge port, the inside of the dry fermentation tank body is rotatably connected with a stirring main shaft, and the circumference of the stirring main shaft is connected with a plurality of stirring paddles. The stirring paddles are periodically and spirally arranged in the axis direction of the stirring main shaft; the stirring main shaft is a hollow shaft, and the open ends of the two sides of the stirring main shaft are connected with the thermal medium inflow pipe and the thermal medium outflow pipe correspondingly. An inner cavity of the stirring paddle is filled with a heat-conducting medium and is provided with a heat pipe for transferring heat; one end of the heat pipe extends out of the inner cavity of the stirring paddle and is inserted into the hollow cavity of the stirring main shaft; a paddle top cap is arranged at one end, far away from the stirring main shaft, of the stirring paddle; and concave spaces for crushing and mixing materials are formed in a first working surface and a second working surface of the paddle top cap.

Description

Technical Field

[0001] The utility model belongs to the technical field of fermentation and stirring, and in particular relates to a long-axis dry fermentation stirring machine with a heating device. Background Art

[0002] With the improvement of the level of industrial and agricultural development, the demand for reducing the amount of organic waste is becoming more and more urgent. The method of anaerobic fermentation can effectively treat organic waste and realize the resource and energy utilization of waste. During the anaerobic fermentation process, organic matter is decomposed by microorganisms to produce clean energy-biogas, realizing the resource and energy utilization of organic waste. Anaerobic dry fermentation technology uses solid organic waste such as straw, domestic garbage and livestock and poultry manure as raw materials, and uses anaerobic microorganisms to ferment reactants with a solid content (TS) of 20% to 30% to produce biogas.

[0003] Although the current dry fermentation reactor can handle fermentation products with high concentration, due to the high solid content of dry fermentation materials, high viscosity of materials, and difficulty in stirring, mass transfer is difficult, heat transfer efficiency is low, and stirring is uneven, resulting in large-scale acidification during the fermentation process, resulting in low biogas production, uneven gas production, low gas production rate, etc. Especially in winter or cold remote areas, general dry fermentation equipment is equipped with heating coils in the tank to heat the materials, and the heat transfer efficiency of the materials is low, which seriously affects the efficiency of anaerobic dry fermentation. Utility Model Content

[0004] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a long-axis dry fermentation mixer with a heating device.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] A long-axis dry fermentation mixer with a heating device, comprising a dry fermentation tank body, the dry fermentation tank body is provided with a material inlet and a discharge port, the interior of the dry fermentation tank body is rotatably connected to a stirring main shaft, the circumference of the stirring main shaft is connected to a plurality of stirring paddles, the stirring main shaft is connected to a driving motor, and is characterized in that: the stirring paddles are arranged in a plurality of periodic spirals with respect to the axial direction of the stirring main shaft;

[0007] The stirring main shaft is a hollow shaft, and the open ends on both sides of the stirring main shaft are respectively connected to the heat medium inflow pipe and the heat medium outflow pipe;

[0008] The inner cavity of the stirring paddle is filled with a heat-conducting medium and is provided with a heat pipe for transferring heat, one end of the heat pipe protrudes out of the inner cavity of the stirring paddle and is inserted into the hollow cavity of the stirring main shaft;

[0009] A blade top cap is provided at one end of the stirring paddle away from the stirring main shaft, and a first working surface and a second working surface of the blade top cap are both provided with a concave space for crushing and mixing materials. When the blade top cap follows the stirring main shaft to rotate forward, the side that first contacts the material is the first working surface, and when the blade top cap follows the stirring main shaft to rotate reversely, the side that first contacts the material is the second working surface.

[0010] It is further defined that the material inlet is arranged at the top of the dry fermentation tank body, the discharge port is arranged at the bottom of the dry fermentation tank body, and the outer bottom of the dry fermentation tank body is connected to the tank body support seat. Such a structural design is convenient for feeding at the top and discharging at the bottom, and the tank body support seat is used to support the dry fermentation tank body.

[0011] It is further defined that the heat medium inlet pipe and the heat medium outlet pipe are both sealed and connected to the stirring main shaft. Such a structural design and sealed connection can prevent leakage of the heat medium.

[0012] It is further defined that the stirring spindle is provided with a plurality of through holes for inserting heat pipes. With such a structural design, the through holes are used for inserting the heat pipes into the inner cavity of the stirring spindle, thereby achieving contact between the heat pipes and the heat medium.

[0013] It is further defined that the stirring paddle is also provided with a blade support rod, a blade support seat, a heat pipe seal and a connecting seat, the blade support rod being a hollow structure, one end of the blade support rod being connected to the blade top cap, and the other end being connected to the blade support seat, the heat pipe and the blade support seat being sealed and connected via a heat pipe seal, the connecting seat being connected to the blade support seat and enclosing a circular hole-shaped cavity for covering the stirring main shaft, the connecting seat being fixedly connected to the stirring main shaft, with such a structural design, the blade support rod being used to accommodate a heat-conducting medium, and the heat-conducting medium can be selected from different types as needed, such as hot air, steam, heat-conducting oil, etc., the connecting seat being fixedly connected to the stirring main shaft, and the fixing method can be achieved by welding or other locking structures, the blade support seat being formed by splicing a plurality of sub-plates, and the outer shape is selected to be trapezoidal, and the blade support seat is provided with an arc surface adapted to the outer ring of the stirring main shaft on the basis of the trapezoidal shape, and the trapezoidal design can increase the overall force strength of the stirring paddle.

[0014] The beneficial effects of the utility model are as follows: the stirring paddle in the utility model can improve the mixing degree of dry fermentation materials and improve the mixing uniformity of the overall materials in the tank. The stirring paddle is equipped with a heat pipe, so that the stirring paddle can complete an efficient heat transfer process in the process of stirring the materials, avoiding the problem of low heating efficiency of the heating coil set in the tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 This is a diagram showing the arrangement of the stirring main shaft and stirring paddles in the embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the stirring paddle in the embodiment of the utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of a stirring paddle in an embodiment of the utility model;

[0020] The main component symbols are described as follows:

[0021] 1. Heat medium outflow pipe;

[0022] 2. Drive motor;

[0023] 3. Import of materials;

[0024] 4. Dry fermentation tank;

[0025] 5. Stirring spindle;

[0026] 6. stirring paddle; 61. paddle cap; 62. paddle support rod; 63. heat pipe; 64. heat transfer medium; 65. paddle support seat; 66. heat pipe seal; 67. connection seat;

[0027] 7. Heat medium flows into the pipe;

[0028] 8. Discharge port;

[0029] 9. Tank support seat. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figure 1-4 As shown, the utility model is a long-axis dry fermentation mixer with a heating device, comprising a dry fermentation tank body 4, the dry fermentation tank body 4 is provided with a material inlet 3 and a discharge port 8, the interior of the dry fermentation tank body 4 is rotatably connected to a stirring main shaft 5, the circumference of the stirring main shaft 5 is connected to a plurality of stirring paddles 6, the stirring main shaft 5 is connected to a driving motor 2, and the stirring paddles 6 are arranged in a plurality of periodic spirals about the axis direction of the stirring main shaft 5;

[0032] The stirring main shaft 5 is a hollow shaft, and the open ends on both sides of the stirring main shaft 5 are respectively connected to the heat medium inflow pipe 7 and the heat medium outflow pipe 1;

[0033] The inner cavity of the stirring paddle 6 is filled with a heat-conducting medium 64 and is provided with a heat pipe 63 for transferring heat. One end of the heat pipe 63 protrudes out of the inner cavity of the stirring paddle 6 and is inserted into the hollow cavity of the stirring main shaft 5.

[0034] A paddle cap 61 is provided at one end of the stirring paddle 6 away from the stirring main shaft 5. The first working surface and the second working surface of the paddle cap 61 are both provided with concave spaces for crushing and mixing materials. When the paddle cap 61 rotates forwardly following the stirring main shaft 5, the side that first contacts the material is the first working surface. When the paddle cap 61 rotates reversely following the stirring main shaft 5, the side that first contacts the material is the second working surface.

[0035] In this embodiment:

[0036] The material to be dried and fermented is put into the dry fermentation tank body 4 through the material inlet 3. During the driving process of the driving motor 2, the material ferments and produces gas in the dry fermentation tank body 4, and gradually flows to the discharge port 8 through the stirring action of the stirring paddle 6. The heat medium enters the stirring main shaft 5 through the heat medium flow inlet pipe 7. The heat is transferred to the material in the dry fermentation tank body 4 through the stirring paddle 6. The heat medium after heat exchange is discharged through the heat medium outflow pipe 1.

[0037] Specifically, the stirring paddle 6 contains a heat pipe 63 and a heat-conducting medium 64, so as to realize the high heat transfer efficiency of a single stirring paddle 6. The heat pipe 63 transfers the heat of the heat medium in the inner cavity of the stirring main shaft 5 to the heat-conducting medium 64 in the stirring paddle 6, so as to realize the temperature rise of the stirring paddle 6. A plurality of stirring paddles 6 are arranged on the stirring main shaft 5, so as to increase the contact area between the paddle and the material and improve the overall heating efficiency.

[0038] The concave space on the blade top cap 61 realizes the mixing of the lighter materials in the top layer of the dry fermentation tank body 4, such as straw, with the materials in the lower layer. The blade top cap 61 has a certain crushing function when it contacts with the materials. The first working surface and the second working surface are both provided with concave spaces for crushing and mixing the materials because the stirring main shaft 5 can rotate forward and reverse;

[0039] A plurality of stirring paddles 6 are evenly arranged at a certain angle, which can be selected to be 30°, 45°, 60°, etc., so that the bottom material of the dry fermentation tank body 4 is mixed with the upper material during the stirring process; the stirring paddles 6 are periodically spirally arranged in the axial direction of the stirring main shaft 5, so that the stirring main shaft 5 completes the axial flow-pushing effect and realizes the axial mixing effect of the materials in the tank.

[0040] Preferably, the material inlet 3 is arranged at the top of the dry fermentation tank body 4, the discharge port 8 is arranged at the bottom of the dry fermentation tank body 4, and the outer bottom of the dry fermentation tank body 4 is connected to the tank body support seat 9. Such a structural design facilitates feeding at the top and discharging at the bottom, and the tank body support seat 9 is used to support the dry fermentation tank body 4. In fact, other structural shapes can also be considered according to specific circumstances.

[0041] Preferably, the heat medium inflow pipe 7 and the heat medium outflow pipe 1 are both sealed and connected to the stirring main shaft 5. Such a structural design and sealed connection can prevent leakage of the heat medium. In fact, other structural shapes can also be considered according to specific circumstances.

[0042] Preferably, the stirring main shaft 5 is provided with a plurality of through holes for inserting the heat pipe 63. With such a structural design, the through holes are used for inserting the heat pipe 63 into the inner cavity of the stirring main shaft 5, thereby achieving contact between the heat pipe 63 and the heat medium. In fact, other structural shapes can also be considered according to specific circumstances.

[0043] Preferably, the stirring paddle 6 is also provided with a blade support rod 62, a blade support seat 65, a heat pipe seal 66 and a connecting seat 67. The blade support rod 62 is a hollow structure. One end of the blade support rod 62 is connected to the blade top cap 61, and the other end is connected to the blade support seat 65. The heat pipe 63 and the blade support seat 65 are sealed and connected through the heat pipe seal 66. The connecting seat 67 is connected to the blade support seat 65 and encloses a circular hole-shaped cavity for covering the stirring main shaft 5. The connecting seat 67 is fixedly connected to the stirring main shaft 5. The paddle support rod 62 is used to accommodate the heat transfer medium 64. The heat transfer medium 64 can be selected according to different types, such as hot air, steam, heat transfer oil, etc. The connecting seat 67 is fixedly connected to the stirring main shaft 5. The fixing method can be achieved by welding or other locking structures. The paddle support seat 65 is composed of multiple sub-plates. The shape is selected to be trapezoidal. The paddle support seat 65 is provided with an arc surface adapted to the outer ring of the stirring main shaft 5 on the basis of the trapezoidal shape. The trapezoidal design can increase the overall force strength of the stirring paddle 6. In fact, other structural shapes can also be considered according to specific circumstances.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A long-axis dry fermentation mixer with a heating device, comprising a dry fermentation tank body (4), wherein the dry fermentation tank body (4) is provided with a material inlet (3) and a discharge port (8), wherein the interior of the dry fermentation tank body (4) is rotatably connected to a stirring main shaft (5), wherein the circumference of the stirring main shaft (5) is connected to a plurality of stirring paddles (6), and the stirring main shaft (5) is dynamically connected to a driving motor (2), wherein the characteristics are as follows: The stirring paddles (6) are arranged in a plurality of periodic spirals with respect to the axial direction of the stirring main shaft (5); The stirring main shaft (5) is a hollow shaft, and the open ends on both sides of the stirring main shaft (5) are respectively connected to the heat medium inflow pipe (7) and the heat medium outflow pipe (1); The inner cavity of the stirring paddle (6) is filled with a heat-conducting medium (64) and is provided with a heat pipe (63) for transferring heat, and one end of the heat pipe (63) protrudes out of the inner cavity of the stirring paddle (6) and is inserted into the hollow cavity of the stirring main shaft (5); The end of the stirring paddle (6) away from the stirring main shaft (5) is provided with a blade top cap (61), and the first working surface and the second working surface of the blade top cap (61) are both provided with a concave space for crushing and mixing materials. When the blade top cap (61) follows the stirring main shaft (5) to rotate forward, the side that first contacts the material is the first working surface, and when the blade top cap (61) follows the stirring main shaft (5) to rotate reversely, the side that first contacts the material is the second working surface.

2. A long-axis dry fermentation mixer with a heating device according to claim 1, characterized in that: The material inlet (3) is arranged at the top of the dry fermentation tank body (4), the discharge port (8) is arranged at the bottom of the dry fermentation tank body (4), and the outer bottom of the dry fermentation tank body (4) is connected to a tank body support seat (9).

3. The long-axis dry fermentation mixer with a heating device according to claim 1, characterized in that: The heat medium inflow pipe (7) and the heat medium outflow pipe (1) are both sealedly connected to the stirring main shaft (5).

4. The long-axis dry fermentation mixer with a heating device according to claim 1, characterized in that: The stirring main shaft (5) is provided with a plurality of through holes for inserting the heat pipes (63).

5. The long-axis dry fermentation mixer with a heating device according to claim 1, characterized in that: The stirring paddle (6) is further provided with a blade support rod (62), a blade support seat (65), a heat pipe seal (66) and a connecting seat (67); the blade support rod (62) is a hollow structure; one end of the blade support rod (62) is connected to the blade top cap (61), and the other end is connected to the blade support seat (65); the heat pipe (63) and the blade support seat (65) are sealed and connected via the heat pipe seal (66); the connecting seat (67) is connected to the blade support seat (65) and encloses a circular hole-shaped cavity for covering the stirring main shaft (5); the connecting seat (67) is fixedly connected to the stirring main shaft (5).

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