Excrement residue drying system

Abstract

The embodiment of the utility model discloses an excrement residue drying system. The excrement residue drying system comprises a first bin body; the conveying belt extends in the horizontal direction, is arranged in the inner cavity of the first bin body and is used for conveying manure residues, and a plurality of ventilation holes are formed in the conveying belt; the air inlets are formed in the bottom of the first bin body side by side and are opposite to the conveying belt; the air outlets are formed in the top of the first bin body side by side and are opposite to the conveying belt; the second bin body is communicated with the first bin body; a hot air generating device and a cooling device are arranged in an inner cavity of the second bin body; the hot air generating device comprises a heating coil used for circulating high-temperature water, the heating coil is configured to be used for heating cold air passing through the heating coil and generating hot air, and the hot air enters the first bin body through the multiple air inlets; the cooling device is configured to be used for cooling and condensing the damp and hot air output by the multiple air outlets, condensate water and cold air are generated, and the cold air is conveyed to the hot air generating device and heated through the heating coil.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of manure drying, and more particularly to a manure drying system. BACKGROUND

[0002] The moisture content of manure is 65% to 80% after once dehydration, and the traditional manure dehydration is through extrusion and airing, the airing process is greatly affected by the weather, and the dehydration is slow, and pathogenic bacteria breed in the dehydration process, which affects the health of the cattle when backfilled to the playground.

[0003] In the prior art, the secondary dehydration and sterilization of manure usually uses a drying cylinder, the temperature of the drying cylinder is 300 DEG C to 400 DEG C, the inside of the drying cylinder is easy to explode when high-temperature air is blown, which is very unsafe, and in order to prevent tail gas from being discharged to the outside to pollute the air, tail gas treatment is also needed. This way not only has a low service life of the drying cylinder, but also has low safety performance and complex structure. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a manure drying system to solve at least one of the above technical problems.

[0005] In order to achieve at least one of the above purposes, the application adopts the following technical scheme:

[0006] The application provides a manure drying system, which comprises a first bin body; a conveying belt for conveying manure is arranged in the inner cavity of the first bin body in a horizontal direction, the conveying belt is provided with a plurality of ventilation holes; a plurality of air inlets are arranged in parallel at the bottom of the first bin body and opposite to the conveying belt; a plurality of air outlets are arranged in parallel at the top of the first bin body and opposite to the conveying belt;

[0007] A second bin body is in communication with the first bin body; a hot air generating device and a cooling device are arranged in the inner cavity of the second bin body; the hot air generating device comprises a temperature rising coil pipe for circulating high-temperature water, the temperature rising coil pipe is configured to heat the cold air passing through the temperature rising coil pipe and generate hot air, the hot air enters the first bin body through the plurality of air inlets; the cooling device is configured to cool and condense the humid hot air output by the plurality of air outlets, generate condensed water and cold air, and the cold air is transmitted to the hot air generating device and heated by the temperature rising coil pipe.

[0008] Optionally, the conveying belt has at least two, and is arranged in a stacked manner from top to bottom;

[0009] The manure on the upper conveying belt of the two adjacent conveying belts can fall onto the lower conveying belt.

[0010] Optionally, a feeding port is arranged on one side edge of the top of the first bin body, and the feeding port is arranged opposite to the feeding end of one of the conveying belts near the top of the first bin body.

[0011] A discharging port is arranged on one side edge of the bottom of the first bin body, and the discharging port is arranged opposite to the discharging end of one of the conveying belts near the bottom of the first bin body.

[0012] Optionally, a filter screen is arranged on one side of the air outlet near the first bin body.

[0013] Optionally, the manure drying system further comprises a circulating fan configured to transmit the hot air generated by the heating coil in the second bin body to the first bin body, and the wet hot air output by the first bin body is transmitted to the cooling device and the hot air generating device.

[0014] Optionally, the manure drying system further comprises a boiler configured to provide high-temperature water for the heating coil.

[0015] The boiler is in communication with the receiving end of the heating coil through a water inlet pipe and in communication with the output end of the heating coil through a backwater pipe.

[0016] Optionally, the manure drying system further comprises a granulator configured to feed manure to the first bin body.

[0017] The granulator comprises two extrusion rollers, and the extrusion teeth on the two extrusion rollers are arranged in an interlaced manner.

[0018] Optionally, the manure drying system further comprises a temperature sensor and a humidity sensor arranged on the top of the first bin body.

[0019] Optionally, the temperature of the hot air generated by the heating of the cold air by the heating coil is 75-85℃.

[0020] Optionally, the conveying belt comprises a mesh belt configured to carry and move the manure, and the mesh belt comprises a plurality of the ventilation holes.

[0021] The beneficial effects of the present application are as follows:

[0022] To address the problems existing in current technologies, this application provides a manure drying system. High-temperature water is circulated inside a heating coil to raise its temperature. Cold air passing through the heating coil is heated to form hot air, which enters the first chamber through multiple air inlets. As the manure travels on a conveyor belt, it forms strong convection with the hot air to remove moisture, thus drying the manure. The resulting humid, hot air is output to the second chamber through multiple air outlets. A cooling device cools and condenses the humid, hot air, generating condensate and cold air. The cold air is then transmitted to a hot air generating device, where it is heated again by the heating coil to generate hot air, which then enters the first chamber through multiple air inlets. This allows for air circulation between the first and second chambers, achieving recycling. It eliminates the need for external supply of hot air to the first chamber and for exhaust gas treatment, resulting in energy savings, environmental protection, and an increased lifespan for the entire manure drying system. In addition, the heating coil heats the cold air with high-temperature water, generating hot air at a temperature between 75°C and 85°C. This temperature prevents dust explosions, significantly improving safety. During the drying process, the lower temperature of the hot air greatly reduces the amount of H2S and NH3 produced. The small amount of H2S and NH3 produced dissolves into the condensate and flows directly into the wastewater pond, which is then used for farmland reuse. No polluted wastewater is generated, and there is no odor. The manure drying system provided in this application can dry manure with a moisture content of 65% to 80% to a moisture content of 15% to 40%. The entire process is free of waste gas and waste emissions. Manure can be continuously fed in and discharged, and the entire system operates automatically without manual intervention, meeting the farm's needs at all times. Attached Figure Description

[0023] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0024] Fig. 1 This diagram illustrates the overall structure of a manure drying system according to one embodiment of the present application.

[0025] Fig. 2 A front view of a granulator in a manure drying system according to one embodiment of this application is shown.

[0026] Fig. 3 A side view of a granulator in a manure drying system according to one embodiment of this application is shown. Detailed Implementation

[0027] In the following description, numerous specific details are set forth for illustrative purposes and to provide a comprehensive understanding of one or more embodiments. However, it will be apparent that these embodiments can also be implemented without these specific details.

[0028] In the description of the present application, it needs to be explained that the terms "upper", "lower" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] It also needs to be explained that in the description of the present application, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a…" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0030] To solve the problems in the prior art, one embodiment of the present application provides a fecal residue drying system, which comprises a drying device and a conveying device. Figs. 1-3As shown, it comprises a first bin body 1, the inner wall of the first bin body 1 is provided with a corrosion-resistant layer (not shown in the figure); a conveying belt for conveying fecal sludge 10 is arranged in the inner cavity of the first bin body 1 in the horizontal direction, the conveying belt is provided with a plurality of ventilation holes; a plurality of air inlets 11 are arranged in parallel at the bottom of the first bin body 1 and opposite to the conveying belt; a plurality of air outlets 12 are arranged in parallel at the top of the first bin body 1 and opposite to the conveying belt; a second bin body 2 in communication with the first bin body 1; a heat generating device and a cooling device 4 are arranged in the inner cavity of the second bin body 2; the heat generating device comprises a temperature rising coil 3 for circulating high-temperature water, the temperature rising coil 3 is configured to heat the cold air passing through the temperature rising coil 3 and generate hot air, the hot air enters the first bin body 1 through the plurality of air inlets 11, the temperature of the hot air generated by heating the cold air passing through the temperature rising coil 3 is 75-85℃; the cooling device 4 is configured to cool and condense the humid hot air output by the plurality of air outlets 12, generate condensed water and cold air, the temperature of the condensed water is 32-37℃, the temperature of the cold air is 50-55℃, the condensed water is discharged to a sewage pool 41, and the cold air is transmitted to the heat generating device and heated by the temperature rising coil 3. The cooling device 4 can be a cooling tower.

[0031] In the above embodiments of the present application, by passing high-temperature water in the inside of the temperature-increasing coil pipe 3 to increase the temperature of the temperature-increasing coil pipe 3, the cold air passing through the temperature-increasing coil pipe 3 is heated to form hot air, the hot air enters the first bin body 1 through the plurality of air inlets 11, and the fecal sludge 10 on the conveying belt forms strong convection with the hot air to take away the moisture on the fecal sludge 10, so as to realize the air drying of the fecal sludge 10, the wet hot air formed is output to the second bin body 2 through the plurality of air outlets 12, the wet hot air is cooled and condensed by the cooling device 4 to generate condensed water and cold air, the cold air is transmitted to the hot air generating device, heated by the temperature-increasing coil pipe 3, and hot air is generated again and enters the first bin body 1 through the plurality of air inlets 11, so that the air in the first bin body 1 and the second bin body 2 can circulate to realize recycling, without the need to supply hot air to the first bin body 1 from the outside, and without the need to treat tail gas, which is energy-saving and environment-friendly and improves the service life of the entire fecal sludge drying system. In addition, the temperature-increasing coil pipe 3 heats the cold air by high-temperature water, and the temperature of the generated hot air is between 75°C and 85°C, which will not cause dust explosion, greatly improving the safety; during the drying process, the amount of H2S, NH3 and other waste gas generated is greatly reduced due to the low temperature of the hot air, and a small amount of H2S, NH3 and other waste gas generated will be mixed into the condensed water and directly enter the sewage tank 41, and finally the sewage tank 41 is used for field utilization, without producing polluted wastewater and without odor overflow. The fecal sludge drying system provided by the present application can dry the fecal sludge 10 with a water content of 65% to 80% to a water content of 15% to 40%, and the entire process is free of waste gas and waste discharge, the fecal sludge 10 can be realized by entering and exiting, the entire system is automatically operated without manual intervention, and the use demand of the pasture can be met at any time.

[0032] After the fecal sludge 10 is sterilized twice by low-temperature drying, it is used as high-quality litter to realize 100% recycling of fecal sludge and without pollution of the environment.

[0033] In a specific embodiment, the conveying belts are at least two and are stacked from top to bottom; the dung 10 on the upper conveying belt can fall onto the lower conveying belt. The arrangement of multiple conveying belts can blow the dung 10 multiple times; since the air inlet 11 is at the bottom of the first bin body 1, the moisture content of the dung 10 on the lower conveying belt can be minimized after blowing. Preferably, the number of conveying belts is three, which are the first conveying belt, the second conveying belt and the third conveying belt from top to bottom; the dung 10 is received by the receiving end of the first conveying belt, and is transported to the discharge end of the first conveying belt, and then falls from the discharge end of the first conveying belt to the receiving end of the second conveying belt, and is transported to the discharge end of the second conveying belt, and then falls from the discharge end of the second conveying belt to the receiving end of the third conveying belt, and is transported to the discharge end of the third conveying belt, and then is conveyed to the outside from the discharge end.

[0034] Further, one side edge of the top of the first bin body 1 is provided with an inlet (not labeled in the figure), which is arranged opposite to the receiving end of one of the conveying belts near the top of the first bin body 1; one side edge of the bottom of the first bin body 1 is provided with an outlet (not labeled in the figure), which is arranged opposite to the discharge end of one of the conveying belts near the bottom of the first bin body 1. The dung 10 falls through the inlet to the receiving end of one of the conveying belts near the top of the first bin body 1, i.e. the first conveying belt, and is transported to the position of the discharge end of one of the conveying belts near the bottom of the first bin body 1, i.e. the third conveying belt, which transports the dung 10 to the discharge end and falls to the position of the outlet, and is discharged from the first bin body 1 through the outlet.

[0035] In a specific embodiment, the conveying belt includes a mesh belt (not shown in the figure) for carrying and moving the dung 10; the mesh belt includes a plurality of ventilation holes. The dung 10 is statically spread on the mesh belt, and electrostatic friction occurs between the dung 10 and the mesh belt; the mesh belt is driven by the conveying belt body to move along the extension direction of the conveying belt, and the ventilation holes improve the ventilation, so that the hot air entering the first bin body 1 from the air inlet 11 can be blown to the dung 10 through the ventilation holes to remove the moisture on the dung 10, thereby realizing the air drying of the dung 10. In actual application, the mesh belt has multiple sub-mesh belts connected by buckles; when a sub-mesh belt is damaged, only the single sub-mesh belt needs to be replaced, thereby reducing the maintenance cost; the material of the mesh belt is PP plastic, which has the function of corrosion resistance.

[0036] In an embodiment, the air outlet 12 is provided with a filter screen 121 near one side of the first bin body 1. The filter screen 121 can filter dust, and ensure that the humid hot air output from the air outlet 12 into the second bin body 2 meets the standard, with a dust concentration less than 60 g / m 3 , and the temperature of the fecal residue 10 is less than 70℃, which will not affect the system. The environment of the entire drying system is clean and hygienic, and there is no risk of dust explosion.

[0037] In an embodiment, the fecal residue drying system further comprises a circulating fan 5 and a micro-negative pressure fan 6. The circulating fan 5 is configured to transmit the hot air generated by the heating coil 3 in the second bin body 2 to the first bin body 1. The micro-negative pressure fan 6 is configured to transmit the humid hot air output from the first bin body 1 to the cooling device 4 and the hot air generating device. The use of the circulating fan 5 and the micro-negative pressure fan 6 enables the air in the system to circulate between the first bin body 1 and the second bin body 2, and be recycled.

[0038] In an embodiment, the fecal residue drying system further comprises a boiler 7 for providing high-temperature water for the heating coil 3. The boiler 7 is in communication with the receiving end of the heating coil 3 through a water inlet pipe 71, and in communication with the output end of the heating coil 3 through a water return pipe 72. The boiler 7 heats water to form high-temperature water, which is transmitted to the heating coil 3 through the water inlet pipe 71. The heating coil 3 heats the cold air to form hot air, and at this time the temperature of the water in the heating coil 3 decreases to form low-temperature water, which is transmitted to the boiler 7 again through the water return pipe 72. The boiler 7 heats the low-temperature water again, and the cycle continues. In this way, the water in the boiler 7 and the heating coil 3 can be recycled, and there is no need to supply water to the system from outside. Here, the temperature of the high-temperature water is 90℃ to 95℃, and the temperature of the low-temperature water is 60℃ to 70℃.

[0039] In an embodiment, the fecal residue drying system further comprises a temperature sensor 81 and a humidity sensor 82 located at the top of the first bin body 1. The temperature sensor 81 is used to measure the temperature of the first bin body 1, and the humidity sensor 82 is used to measure the humidity of the first bin body 1. The temperature sensor 81 and the humidity sensor 82 are placed at the top of the first bin body 1, i.e. near the air outlet 12. In this way, the temperature sensor 81 can measure the temperature of the humid hot air output from the first bin body 1. When the temperature is less than a preset value, the speed of the hot air entering the first bin body 1 is slowed down. When the temperature is greater than the preset value, the speed of the hot air entering the first bin body 1 is increased. The humidity sensor 82 can measure the humidity of the humid hot air output from the first bin body 1. When the humidity is greater than a preset value, the speed of the conveyor belt is slowed down, and the residence time of the fecal residue 10 on the conveyor belt is lengthened.

[0040] In a specific embodiment, the manure drying system further comprises a granulator 9 for feeding the manure 10 into the first bin 1; the granulator 9 comprises two extrusion rollers 91, and the extrusion teeth on the two extrusion rollers 91 are arranged in an interlaced manner.

[0041] Specifically, the granulator 9 further comprises two oppositely arranged push rods 92 above the two extrusion rollers 91, and the push rods 92 are provided with a plurality of push teeth 921, the push teeth 921 on the two push rods 92 are arranged in an interlaced manner and rotate towards each other, so that the manure 10 entering the granulator 9 can smoothly enter between the two extrusion rollers 91 through the push teeth 921 on the two push rods 92. When the manure 10 enters between the two extrusion rollers 91, the extrusion process begins, and the two extrusion rollers 91 rotate towards each other, so that the manure 10 between the two extrusion rollers 91 gradually increases in pressure, that is, the manure 10 is extruded between the two extrusion rollers 91, and the manure 10 is formed after passing through the gap between the two extrusion rollers 91. The manure 10 after extrusion and molding can be in a strip shape, continuously discharged from the discharge end of the two extrusion rollers 91, and the discharged manure 10 in a strip shape has a certain shape and strength, which can maintain its structure stable and facilitate subsequent processing. Here, the gap between the two extrusion rollers 91 can be adjusted according to actual conditions, and the extrusion teeth on the two extrusion rollers 91 can also be of different shapes. The shape and size of the manure 10 output by the extrusion teeth of different shapes and different gaps are also different, for example, the longitudinal section of the output manure 10 can be circular or rectangular.

[0042] In a specific example, the granulator 9 further comprises a first driving motor 93 for driving the two push rods 92 to rotate, and a second driving motor 94 for driving the two extrusion rollers 91 to rotate.

[0043] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description, and all the embodiments cannot be exhausted here. Any obvious changes or variations derived from the technical solutions of the present application still fall within the protection scope of the present application.

Claims

1. A manure residue drying system, characterized in that, include A first silo body; a conveyor belt for conveying fecal sludge extending horizontally within the inner cavity of the first silo body, the conveyor belt having multiple ventilation holes; and multiple air inlets arranged side by side at the bottom of the first silo body and opposite to the conveyor belt. Multiple air outlets are arranged side by side on the top of the first compartment and opposite to the conveyor belt; A second chamber is connected to the first chamber; a hot air generating device and a cooling device are provided in the inner cavity of the second chamber; the hot air generating device includes a heating coil for circulating high-temperature water, the heating coil is configured to heat the cold air passing through the heating coil and generate hot air, the hot air enters the first chamber through multiple air inlets; the cooling device is configured to cool and condense the humid hot air output from multiple air outlets to generate condensate and cold air, the cold air is transmitted to the hot air generating device and heated by the heating coil.

2. The manure drying system according to claim 1, characterized in that, The conveyor belt has at least two belts, which are stacked sequentially from top to bottom; The manure residue on the upper conveyor belt can fall onto the lower conveyor belt.

3. The manure drying system according to claim 2, characterized in that, A feed inlet is provided on one side edge of the top of the first hopper, and the feed inlet is positioned opposite to the receiving end of one of the conveyor belts near the top of the first hopper. A discharge port is provided on one side edge of the bottom of the first hopper, and the discharge port is positioned opposite to the discharge end of one of the conveyor belts near the bottom of the first hopper.

4. The manure drying system according to claim 1, characterized in that, A filter screen is installed on the side of the air outlet closest to the first chamber.

5. The manure drying system according to claim 1, characterized in that, The manure drying system also includes a circulating fan, which is configured to transfer hot air generated by the heating coil in the second chamber to the first chamber, and the hot and humid air output from the first chamber is transferred to the cooling device and the hot air generating device.

6. The manure drying system according to claim 1, characterized in that, The manure drying system also includes a boiler that provides high-temperature water to the heating coils; The boiler is connected to the receiving end of the heating coil via an inlet water pipe and to the output end of the heating coil via a return water pipe.

7. The manure drying system according to claim 1, characterized in that, The manure drying system also includes a granulator for conveying manure to the first silo; The granulator includes two extrusion rollers, with the extrusion teeth on the two extrusion rollers arranged alternately.

8. The manure drying system according to claim 1, characterized in that, The manure drying system also includes a temperature sensor and a humidity sensor located at the top of the first silo.

9. The manure drying system according to claim 1, characterized in that, The temperature of the hot air generated by the heating coil is 75°C to 85°C.

10. The manure drying system according to claim 1, characterized in that, The conveyor belt includes a mesh belt for carrying and moving manure sludge; the mesh belt includes a plurality of ventilation holes.

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