Organic fertilizer particle drying equipment utilizing compost fermentation waste heat

Abstract

The invention discloses organic fertilizer particle drying equipment utilizing compost fermentation waste heat, and relates to the field of organic fertilizer drying, the organic fertilizer particle drying equipment comprises a belt type drying bin, a controller and a fixed hot air system are arranged outside the belt type drying bin, and the fixed hot air system comprises a hot air source and a heat supply pipe arranged on the hot air source; and a first electromagnetic valve is arranged on the heat supply pipe. According to the organic fertilizer particle drying equipment utilizing the compost fermentation waste heat, the fixed hot air system serves as a main drying heat source, meanwhile, heat generated by compost fermentation in the compost bin serves as a standby heat source, and a temperature sensor, a controller and a heat exchange circulating unit are matched with one another; heat sources can be automatically switched in the drying process of the organic fertilizer particles, so that the drying stability of the organic matter particles can be effectively ensured while excessive heat generated by compost fermentation is fully utilized, and the drying work of the organic matter particles can be continuously and stably carried out.

Description

Technical Field

[0001] The present invention relates to the technology of organic fertilizer drying, and particularly to an organic fertilizer granule drying device using the waste heat of compost fermentation. Background Art

[0002] In the production process of organic fertilizers, drying is one of the key links. Traditional drying of organic fertilizer granules usually adopts methods such as electric heating and coal heating. These methods not only consume a large amount of energy, increase production costs, but also produce pollutants such as carbon dioxide and sulfur dioxide, causing greater pressure on the environment. In addition, a large amount of waste heat is generated during the compost fermentation process, and this waste heat is often directly discharged into the environment without being effectively utilized, resulting in waste of energy. Therefore, how to effectively utilize the waste heat of compost fermentation to dry organic fertilizer granules has become an urgent problem to be solved currently. Summary of the Invention

[0003] The purpose of the present invention is to provide an organic fertilizer granule drying device using the waste heat of compost fermentation to solve the above deficiencies in the prior art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An organic fertilizer granule drying device using the waste heat of compost fermentation, including a belt drying bin. A controller and a fixed hot air system are arranged outside the belt drying bin. The fixed hot air system includes a hot air source and a heating pipe arranged on the hot air source. A first solenoid valve is arranged on the heating pipe. A compost bin is arranged outside the belt drying bin. A heat exchange tank is arranged inside the compost bin. A heat exchange cavity is formed between the heat exchange tank and the inner wall of the compost bin. The heat exchange cavity is filled with a heat exchange liquid. Multiple groups of temperature sensors are arranged at intervals from top to bottom inside the heat exchange tank. An auxiliary heating box is arranged outside the belt drying bin. A hot air pipe is arranged between the auxiliary heating box and the belt drying bin. A second solenoid valve is arranged on the hot air pipe. A heat exchange circulation unit is arranged between the auxiliary heating box and the heat exchange cavity. The first solenoid valve, the second solenoid valve, and the temperature sensors are all electrically connected to the controller.

[0005] Further, the heat exchange circulation unit includes a water outlet pipe and a water inlet pipe respectively installed at the upper and lower ends outside the compost bin. The water outlet pipe and the water inlet pipe are both communicated with the heat exchange cavity. A water storage tank is arranged outside the belt drying bin. A fan corresponding to the hot air pipe is arranged inside the auxiliary heating box. An air inlet groove is opened on one side of the inner wall of the auxiliary heating box away from the hot air pipe. Multiple groups of sequentially communicated heat dissipation pipes are arranged on the inner wall of the auxiliary heating box. The fan draws external air flow into the air inlet groove and passes through the heat dissipation pipes.

[0006] Further, a circulation pump is provided outside the belt drying bin. The liquid inlet end of the circulation pump is communicated with the liquid outlet end of the heat dissipation pipe. The liquid outlet end of the circulation pump is communicated with the water inlet pipe. The liquid inlet end of the heat dissipation pipe is communicated with one side of the water storage tank. The water outlet pipe is communicated with the other side of the water storage tank.

[0007] Further, the bottom part of the heat exchange tank is arranged in an inverted truncated cone shape. A heat exchange pipe is arranged inside the heat exchange tank. The heat exchange pipe is arranged in a spiral shape, and the diameter value of its spiral part increases sequentially from bottom to top. A rotating shaft is arranged inside the heat exchange tank. The rotating shaft is driven by a motor. A spiral stirring blade is arranged on the rotating shaft. The outer diameter value of the spiral stirring blade increases sequentially from bottom to top, and the shape of the spiral stirring blade is adapted to the inverted truncated cone-shaped part at the bottom of the heat exchange tank.

[0008] Further, the bottom and the top of the heat exchange pipe are respectively communicated with the bottom and the top of the heat exchange chamber.

[0009] Further, a feed inlet is opened at the top of the composting bin. A discharge pipe is arranged at the bottom of the composting bin. A control valve is arranged on the discharge pipe.

[0010] Compared with the prior art, an organic fertilizer granule drying device using the waste heat of compost fermentation provided by the present invention has the following beneficial effects: 1. For the organic fertilizer granule drying device using the waste heat of compost fermentation, by using the fixed hot air system as the main drying heat source, and at the same time, using the heat generated by the compost fermentation inside the composting bin as the standby heat source, the mutual cooperation among the temperature sensor, the controller and the heat exchange circulation unit can automatically switch the heat source during the drying process of the organic fertilizer granules. Thus, while ensuring that the excess heat generated by the compost fermentation is fully utilized, it can effectively ensure the stability of the drying of the organic matter granules, so that the drying work of the organic matter granules can be carried out continuously and stably.

[0011] 2. For the organic fertilizer granule drying device using the waste heat of compost fermentation, by arranging the bottom part of the heat exchange tank in an inverted truncated cone shape and equipped with a matching spiral stirring blade, the compost inside the heat exchange tank can be effectively turned over, so that the temperature inside the compost is relatively uniform. At the same time, with the cooperation of the heat exchange pipe, the excess heat generated during the composting process can be better transferred, so that the waste heat generated during the compost fermentation process can be fully utilized. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0013] Figure 1 Schematic diagram of the overall structure provided by the embodiment of the present invention; Figure 2 Schematic diagram of the connection structure between the composting bin and the auxiliary heating tank provided by the embodiment of the present invention; Figure 3 Schematic diagram of the partial sectional structure of the composting bin provided by the embodiment of the present invention; Figure 4 Schematic diagram of the partial sectional structure of the auxiliary heating tank provided by the embodiment of the present invention; Figure 5 Schematic diagram of the top view of the belt drying bin provided by the embodiment of the present invention.

[0014] Explanation of reference numerals: 1. Belt drying bin; 2. Controller; 3. Fixed hot air system; 31. Hot air source; 32. Heating pipe; 33. First solenoid valve; 4. Composting bin; 41. Heat exchange tank; 42. Heat exchange chamber; 43. Temperature sensor; 5. Auxiliary heating tank; 51. Hot air pipe; 52. Second solenoid valve; 6. Water outlet pipe; 61. Water inlet pipe; 62. Water storage tank; 63. Fan; 64. Air inlet groove; 65. Heat dissipation pipe; 66. Circulation pump; 7. Heat exchange pipe; 71. Rotating shaft; 72. Helical stirring blade; 8. Feed inlet; 81. Discharge pipe; 82. Control valve. Detailed implementation manners

[0015] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0016] Embodiment 1: Please refer to Figures 1-5 , an organic fertilizer granule drying device that utilizes the waste heat of compost fermentation, including a belt drying bin 1. A controller 2 and a fixed hot air system 3 are arranged outside the belt drying bin 1. The fixed hot air system 3 includes a hot air source 31 and a heating pipe 32 arranged on the hot air source 31. A first solenoid valve 33 is arranged on the heating pipe 32; It should be noted that both the belt drying bin 1 and the fixed hot air system 3 are common equipment and instruments in the drying and processing process, and can be directly purchased, which are prior arts and will not be elaborated here.

[0017] A composting bin 4 is arranged outside the belt drying bin 1. A heat exchange tank 41 is arranged inside the composting bin 4. A heat exchange chamber 42 is formed between the heat exchange tank 41 and the inner wall of the composting bin 4. The heat exchange chamber 42 is filled with a heat exchange liquid. Multiple groups of temperature sensors 43 are arranged at intervals from top to bottom inside the heat exchange tank 41; An auxiliary heating box 5 is provided outside the belt drying bin 1. A hot air pipe 51 is provided between the auxiliary heating box 5 and the belt drying bin 1. A second solenoid valve 52 is provided on the hot air pipe 51. A heat exchange circulation unit is provided between the auxiliary heating box 5 and the heat exchange chamber 42. The first solenoid valve 33, the second solenoid valve 52 and the temperature sensor 43 are all electrically connected to the controller 2.

[0018] During the process of drying the organic fertilizer particles in the belt drying bin 1, the temperature inside the heat exchange tank 41 is detected in real time by the temperature sensor 43, and the detected result is transmitted to the controller 2, so that the controller 2 can control the opening and closing of the first solenoid valve 33 and the second solenoid valve 52 according to the temperature inside the heat exchange tank 41.

[0019] It should be further noted that during the composting fermentation process, temperature has a great influence on its actual fermentation state. Therefore, during the process of utilizing the heat inside the heat exchange tank 41, it is necessary to ensure that it will not hinder the composting fermentation process, so as to ensure the continuous generation of heat.

[0020] In this embodiment, the heat exchange circulation unit includes a water outlet pipe 6 and a water inlet pipe 61 respectively installed at the upper and lower ends outside the composting bin 4. The water outlet pipe 6 and the water inlet pipe 61 are both communicated with the heat exchange chamber 42. A water storage tank 62 is provided outside the belt drying bin 1. A fan 63 corresponding to the hot air pipe 51 is provided inside the auxiliary heating box 5. An air inlet groove 64 is opened on one side of the inner wall of the auxiliary heating box 5 away from the hot air pipe 51. A plurality of groups of sequentially connected heat dissipation pipes 65 are provided on the inner wall of the auxiliary heating box 5. The fan 63 draws the outside air flow into and through the heat dissipation pipes 65 from the air inlet groove 64. A circulation pump 66 is provided outside the belt drying bin 1. The liquid inlet end of the circulation pump 66 is communicated with the liquid outlet end of the heat dissipation pipe 65. The liquid outlet end of the circulation pump 66 is communicated with the water inlet pipe 61. The liquid inlet end of the heat dissipation pipe 65 is communicated with one side of the water storage tank 62. The water outlet pipe 6 is communicated with the other side of the water storage tank 62.

[0021] During the operation of the belt drying bin 1, the temperature sensor 43 monitors the internal temperature of the heat exchange tank 41 in real time and transmits the detection result to the controller 2. When the internal temperature can meet the drying requirements of the organic fertilizer particles, the controller 2 controls the second solenoid valve 52 to open, while the first solenoid valve 33 closes and the heat source 31 stops heating. At this time, the circulation pump 66 is started to promote the circulation of the heat exchange liquid among the water storage tank 62, the heat exchange chamber 42, and the heat dissipation pipe 65. When the heat exchange liquid enters the heat exchange chamber 42, under the heat conduction of the heat exchange tank 41, the heat exchange liquid in the heat exchange chamber 42 can be heated, its temperature rises, and it is discharged from the top water outlet pipe 6 into the heat dissipation pipe 65. At this time, the fan 63 is in operation, and it draws in the outside air through the air inlet groove 64, making it pass through the heat dissipation pipe 65 and enter the belt drying bin 1 to dry the organic matter particles inside. When the temperature detected by the temperature sensor 43 is lower than the normal temperature required for compost fermentation, the controller 2 controls the second solenoid valve 52 to close and controls the first solenoid valve 33 to open. At the same time, the heat source 31 starts to supply hot air, so automatic switching can be achieved during the operation process, ensuring the effective utilization of compost heat while also ensuring the normal drying of organic matter particles.

[0022] Embodiment 2: Please refer to Figure 3 , based on the above embodiment, this embodiment provides a technical solution: the bottom part of the heat exchange tank 41 is arranged in an inverted frustum shape, and a heat exchange tube 7 is arranged inside the heat exchange tank 41. The heat exchange tube 7 is arranged in a spiral shape, and the diameter value of its spiral part increases sequentially from bottom to top. A rotating shaft 71 is arranged inside the heat exchange tank 41, and the rotating shaft 71 is driven by a motor. Spiral stirring blades 72 are arranged on the rotating shaft 71, and the outer diameter value of the spiral stirring blades 72 increases sequentially from bottom to top, and the shape of the spiral stirring blades 72 is adapted to the inverted frustum-shaped part at the bottom of the heat exchange tank 41.

[0023] The bottom and top of the heat exchange tube 7 are respectively connected to the bottom and top of the heat exchange chamber 42.

[0024] When the temperature differences detected by multiple temperature sensors 43 are relatively large, the spiral stirring blades 72 are driven to rotate by the rotating shaft 71, so that it can convey the bottom compost upward and turn the compost, making the temperature more balanced everywhere during the composting process, which is conducive to the stable progress of the compost fermentation process. Moreover, through the spiral heat exchange tube 7 arranged, heat exchange can be carried out with the heat accumulated at the bottom during the compost turning process, thereby further improving the heat exchange effect of the heat exchange liquid.

[0025] Embodiment 3: Please refer to Figure 3, on the basis of the above embodiment, this embodiment provides a technical solution. An inlet 8 is opened at the top of the composting bin 4, and a discharge pipe 81 is provided at the bottom of the composting bin 4. A control valve 82 is provided on the discharge pipe 81, so that the composting materials can be discharged and added as needed.

[0026] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An organic fertilizer particle drying device utilizing waste heat from compost fermentation, comprising a belt drying bin (1), wherein a controller (2) and a fixed hot air system (3) are arranged outside the belt drying bin (1), characterized in that: The fixed hot air system (3) comprises a hot air source (31) and a heating pipe (32) arranged on the hot air source (31), wherein the heating pipe (32) is provided with a first solenoid valve (33); A compost bin (4) is arranged outside the belt drying bin (1), a heat exchange liner (41) is arranged inside the compost bin (4), a heat exchange cavity (42) is formed between the heat exchange liner (41) and the inner wall of the compost bin (4), the heat exchange cavity (42) is filled with heat exchange liquid, and a plurality of groups of temperature sensors (43) are arranged at intervals from top to bottom inside the heat exchange liner (41); An auxiliary heating box (5) is arranged outside the belt drying chamber (1); a hot air pipe (51) is arranged between the auxiliary heating box (5) and the belt drying chamber (1); a second solenoid valve (52) is arranged on the hot air pipe (51); and a heat exchange circulation unit is arranged between the auxiliary heating box (5) and the heat exchange chamber (42); The first solenoid valve (33), the second solenoid valve (52) and the temperature sensor (43) are all electrically connected to the controller (2).

2. The organic fertilizer granule drying equipment using waste heat from compost fermentation according to claim 1 is characterized in that: A feed inlet (8) is provided at the top of the compost bin (4), a discharge pipe (81) is provided at the bottom of the compost bin (4), and a control valve (82) is provided on the discharge pipe (81).

3. The organic fertilizer granule drying equipment using waste heat from compost fermentation according to claim 2 is characterized in that: The heat exchange circulation unit comprises a water outlet pipe (6) and a water inlet pipe (61) respectively installed at the upper and lower ends of the outside of the composting bin (4); the water outlet pipe (6) and the water inlet pipe (61) are both connected to the heat exchange chamber (42); a water storage tank (62) is arranged outside the belt drying bin (1); a fan (63) corresponding to the hot air pipe (51) is arranged inside the auxiliary heating box (5); an air inlet groove (64) is provided on the inner wall of the auxiliary heating box (5) away from the hot air pipe (51); a plurality of groups of heat dissipation pipes (65) connected in sequence are arranged on the inner wall of the auxiliary heating box (5); the fan (63) draws external airflow from the air inlet groove (64) into and passes through the heat dissipation pipe (65).

4. The organic fertilizer granule drying device using waste heat from compost fermentation according to claim 3 is characterized in that: A circulation pump (66) is arranged outside the belt drying chamber (1); a liquid inlet end of the circulation pump (66) is connected to a liquid outlet end of the heat dissipation pipe (65); a liquid outlet end of the circulation pump (66) is connected to a water inlet pipe (61); a liquid inlet end of the heat dissipation pipe (65) is connected to one side of a water storage tank (62); and the water outlet pipe (61) is connected to the other side of the water storage tank (62).

5. The organic fertilizer granule drying equipment using waste heat from compost fermentation according to claim 4 is characterized in that: The bottom end portion of the heat exchange liner (41) is arranged in an inverted truncated cone shape, a heat exchange tube (7) is arranged inside the heat exchange liner (41), the heat exchange tube (7) is arranged in a spiral shape, and the diameter of the spiral portion increases from bottom to top, a rotating shaft (71) is arranged inside the heat exchange liner (41), the rotating shaft (71) is driven by a motor, and a spiral stirring blade (72) is arranged on the rotating shaft (71), the outer diameter of the spiral stirring blade (72) increases from bottom to top, and the shape of the spiral stirring blade (72) is compatible with the inverted truncated cone-shaped portion at the bottom of the heat exchange liner (41).

6. The organic fertilizer granule drying device using waste heat from compost fermentation according to claim 5 is characterized in that: The bottom and top of the heat exchange tube (7) are respectively connected to the bottom and top of the heat exchange chamber (42).

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