Harmless cow dung treatment process

Abstract

The invention discloses a harmless cow dung treatment process which comprises the following steps: collecting dung and carrying out solid-liquid separation through solid-liquid separation equipment to divide the dung into slurry and solid; transferring the manure slurry into an anaerobic fermentation bin for anaerobic fermentation, and forming biogas, biogas slurry and biogas residue in the fermentation process of the manure slurry; transferring the excrement solid to a material mixing bin to be crushed and mixed with straw, and transferring the mixed excrement solid and straw mixture into an aerobic fermentation bin; spraying biogas slurry generated after fermentation of the manure slurry to an aerobic fermentation bin; biogas residues generated after fermentation of the manure slurry and the manure solid straw mixture are turned, thrown and mixed. The produced biogas slurry is used for adjusting the water content of the solid feces, the discharge and treatment cost of the biogas slurry is reduced, the biogas residues produced by anaerobic fermentation and the solid feces produced by aerobic fermentation are mixed for use, and the influence of too high heavy metal content in the biogas residues is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of manure treatment and relates to a harmless cow dung treatment process. Background Art

[0002] In dairy cow and beef cattle farms, a large amount of manure is produced every day. If it is not handled in time, it will cause air pollution and hazards such as pests and diseases.

[0003] At present, manure is mainly used by fermenting it into biogas or dry fermenting it into fertilizer. In the process of biogas fermentation, in addition to biogas, biogas residue and biogas liquid are also produced. The treatment method of biogas liquid and biogas residue is mainly to make liquid fertilizer and solid fertilizer. However, biogas liquid and biogas residue contain a large amount of heavy metals, pathogens, etc., which may cause damage to the soil environment when used. Summary of the invention

[0004] In view of the above problems, the present invention proposes a harmless cow dung treatment process, which well solves the problems in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A harmless cow dung treatment process, comprising:

[0007] Collect manure and separate it into slurry and solid through solid-liquid separation equipment;

[0008] The manure slurry is transported into the anaerobic fermentation tank for anaerobic fermentation. During the fermentation process, the manure slurry forms biogas, biogas liquid and biogas residue;

[0009] The manure solids are transported to the material mixing bin for crushing and mixing with the straw, and the mixed manure solids and straw mixture is transported to the aerobic fermentation bin;

[0010] Spraying the biogas slurry produced after the manure slurry is fermented into the aerobic fermentation bin to adjust the water content of the mixture of manure solids and straw;

[0011] The biogas residue produced after the fermentation of the manure slurry is turned over and mixed with the manure solid straw mixture, and after mixing, it is piled in strips for fermentation;

[0012] The generated biogas is dehydrated and desulfurized before being used as fuel gas, and the solid mixture is fermented and made into fertilizer for use;

[0013] The mixing of the biogas residue and the solid straw mixture is performed by a mixing device, which includes:

[0014] A travel rail, which is installed on the floor of the aerobic fermentation bin;

[0015] A turning bin, wherein a first feeding bin is arranged at the upper end of the turning bin, and a discharge port of the turning bin faces the ground of the aerobic fermentation bin;

[0016] A stirring shaft frame, the stirring shaft frame is rotatably installed in the tipping bin, the stirring shaft frame is connected to a driving motor and is used for stirring solid materials;

[0017] A second feeding bin, the second feeding bin is arranged at the lower side of the front end of the flipping bin;

[0018] A U-shaped shaping bin, the U-shaped shaping bin is fixedly mounted on the lower side of the rear end of the flipping bin, and the discharge port of the flipping bin is located on the upper side of the U-shaped shaping bin;

[0019] Traveling wheels are provided at the bottom of the tipping bin, the second feeding bin and the U-shaped shaping bin. The traveling wheels are provided on the traveling rails and are connected to a driving motor.

[0020] Optionally, a baffle is detachably provided at the rear end of the second feed bin, and the discharge port of the dump bin is located at the rear side of the baffle.

[0021] Optionally, the U-shaped shaping bin includes a bin frame, a bin plate is slidably mounted on the upper end of the bin frame via a spring, the bin plates are fixedly connected on both sides of the bin frame, a drive motor is fixedly mounted on the bin frame, an eccentric wheel is mounted on the output end of the drive motor, and the side surface of the eccentric wheel fits the bin plate at the upper end of the bin frame.

[0022] Optionally, the height of the end surface of the U-shaped shaping bin gradually decreases from the front end to the rear end, and the bin plate is hinged to the rear end of the bin frame.

[0023] Optionally, a front end of a bin plate at the upper end of the bin rack is fixedly connected with an arc-shaped plate with the bin plate hinge axis as the central axis, and the outer side surface of the arc-shaped plate fits the flip bin.

[0024] Optionally, two baffles are provided, and the two baffles are respectively hinged to two sides of the rear end of the second feed bin, and the baffle is provided with a driving motor.

[0025] Optionally, the aerobic fermentation bin is provided with an exhaust pipe, the exhaust pipe is connected to an input exhaust fan, the output end of the exhaust pipe is connected to a spray tower, the spray tower is connected to a spray pool, and a deodorant aqueous solution is provided in the spray pool.

[0026] Optionally, a dust collector is provided at the gas input end of the spray tower, and an activated carbon adsorption chamber is provided at the gas output end of the spray tower.

[0027] Optionally, the aerobic fermentation bin includes a mixed fermentation area and an independent fermentation area, the mixed fermentation area is used to ferment the stirred mixture of biogas residue and solid manure and straw, and the independent fermentation area is used to ferment either the biogas residue or the mixture of solid manure and straw.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The generated biogas slurry is used to adjust the water content of solid manure and sewage, reducing the cost of biogas slurry discharge and treatment. Through anaerobic and aerobic fermentation methods, the biogas residue produced by anaerobic fermentation is mixed with solid manure and sewage from aerobic fermentation to reduce the impact of excessive heavy metal content in the biogas residue. At the same time, more organic matter is added to the solid manure and sewage from aerobic fermentation to reduce the disadvantages of using the biogas residue alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the overall process flow of an embodiment of the present invention;

[0031] Figure 2 It is a structural schematic diagram of a flipping device according to an embodiment of the present invention;

[0032] Figure 3 It is a structural schematic diagram of the flipping device from another perspective of an embodiment of the present invention.

[0033] Reference numerals: 1, traveling rail; 11, traveling wheel;

[0034] 2. Turning bin; 31. First feeding bin; 32. Second feeding bin;

[0035] 4. Stirring shaft frame;

[0036] 5. U-shaped shaping bin; 51. baffle; 52. bin frame; 53. bin plate; 531. arc plate; 54. eccentric wheel. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 , is a harmless cow dung treatment process disclosed in an embodiment of the present invention, comprising:

[0039] Collect manure and separate it into slurry and solid through solid-liquid separation equipment;

[0040] The manure slurry is transported into the anaerobic fermentation tank for anaerobic fermentation. During the fermentation process, the manure slurry forms biogas, biogas liquid and biogas residue;

[0041] The manure solids are transported to the material mixing bin for crushing and mixing with the straw, and the mixed manure solids and straw mixture is transported to the aerobic fermentation bin;

[0042] Spraying the biogas slurry produced after the manure slurry is fermented into the aerobic fermentation bin to adjust the water content of the mixture of manure solids and straw;

[0043] The biogas residue produced after the fermentation of the manure slurry is turned over and mixed with the manure solid straw mixture, and after mixing, it is piled in strips for fermentation;

[0044] The generated biogas is dehydrated and desulfurized before being used as fuel gas, and the solid mixture is fermented and made into fertilizer for use;

[0045] Among them, see Figure 2 and Figure 3 The mixture of sludge and solid straw is turned and mixed by a turning and mixing device, which includes a travel track 1, which is installed on the ground of an aerobic fermentation bin, a turning bin 2 is arranged on the travel track 1, a first feed bin 31 is arranged on the upper end of the turning bin 2, and a discharge port of the turning bin 2 faces the ground of the aerobic fermentation bin, a stirring shaft frame 4 is rotatably installed in the turning bin 2, and the stirring shaft frame 4 is connected to a driving motor for stirring solid materials, a second feed bin 32 is arranged on the lower side of the front end of the turning bin 2, a U-shaped shaping bin 5 is fixedly installed on the lower side of the rear end of the turning bin 2, and the discharge port of the turning bin 2 is located on the upper side of the U-shaped shaping bin 5, and the bottoms of the turning bin 2, the second feed bin 32 and the U-shaped shaping bin 5 are all provided with traveling wheels 11, and the traveling wheels 11 are connected to the driving motor.

[0046] Specifically, before entering the fermentation, the solid and liquid manure are separated by solid-liquid separation equipment, the liquid manure is anaerobically fermented in an anaerobic fermentation tank, and the solid manure is aerobically fermented in an aerobic fermentation tank. The biogas produced during the anaerobic fermentation is dehydrated and desulfurized and then used as fuel. The biogas liquid is used for spraying to adjust the water content of the solid manure to achieve better fermentation conditions, and the biogas residue produced during the anaerobic fermentation process is mixed or partially mixed with the solid manure and fermented together to make fertilizer.

[0047] In this way, the produced biogas slurry is used to adjust the water content of solid manure, reducing the cost of biogas slurry discharge and treatment, and through anaerobic and aerobic fermentation methods, the biogas residue produced by anaerobic fermentation is mixed with solid manure from aerobic fermentation to reduce the impact of excessive heavy metal content in the biogas residue. At the same time, more organic matter is added to the solid manure from aerobic fermentation, reducing the disadvantages of the biogas residue when used alone.

[0048] An aerobic fermentation bin may be provided including a mixed fermentation area and an independent fermentation area. The mixed fermentation area is used to ferment the stirred mixture of biogas residue and solid manure and straw, and the independent fermentation area is used to ferment one of the mixture of biogas residue or solid manure and straw, so as to adjust the ratio of the mixture of biogas residue and solid manure, and ferment the biogas residue or solid manure that do not need to be mixed separately.

[0049] In some feasible ways, solid-liquid separation of feces and anaerobic fermentation and aerobic fermentation are all mature processes in feces fermentation technology, which will not be described in detail here. The materials in the aerobic fermentation bin need to be turned over and piled into a material pile of suitable size, and the material pile needs to be turned over and stirred during the fermentation process. The turning and stirring equipment used in the process of this application is disclosed to facilitate the automatic turning and stirring of the material pile.

[0050] In some feasible embodiments, the travel track 1 is arranged on the ground of the aerobic fermentation bin, the travel track 1 includes two parallel tracks, the material pile is arranged between the two tracks, the tipping bin 2 is a trapezoidal bin body, the shape of this part can also be set to other shapes according to the cross-sectional shape of the material pile, both ends and the bottom of the tipping bin 2 are open, a stirring shaft frame 4 is installed inside the tipping bin 2, and the first feeding bin 31 is a trumpet-shaped bin, which is fixedly installed on the upper end of the tipping bin 2 and is used to store materials and feed materials into the tipping bin 2;

[0051] The U-shaped shaping bin 5 is a U-shaped bin body, and both ends and the bottom of the U-shaped shaping bin 5 are open. The U-shaped shaping bin 5 is installed at the rear side of the flipping bin 2 and is used to shape the material pile. After the flipping bin 2 flips and mixes the material, the flipping bin 2 moves forward, and the material is discharged from the rear end of the U-shaped shaping bin 5;

[0052] The second feeding bin 32 is arranged at the front end of the tipping bin 2. When the material pile is tipped for the second time, the material pile at the front end is gathered into the tipping bin 2 through the second feeding bin 32 during the forward movement of the tipping bin 2. After the tipping bin 2 is tipped, it is stacked and discharged again through the U-shaped shaping bin 5.

[0053] As a specific implementation of a harmless cow dung treatment process provided in the application, a baffle 51 is detachably provided at the rear end of the second feed bin 32 , and the discharge port of the dump bin 2 is located at the rear side of the baffle 51 .

[0054] In general, by setting the baffle 51, when the material is first piled up, the baffle 51 is installed so that the front end of the tipping bin 2 is in a closed state, which facilitates the accumulation of the material into the U-shaped shaping bin 5 at the rear end.

[0055] Furthermore, two baffles 51 are provided, and the two baffles 51 are respectively hinged to two sides of the rear end of the second feed bin 32, and the baffles 51 are provided with a driving motor.

[0056] It should be understood that by providing two baffles 51 driven by motors, the automation level of the equipment is improved.

[0057] In some feasible embodiments, a special-shaped through hole is opened on the side wall of the second feed bin 32, and a driving motor is connected to the hinge shaft of the baffle 51. When the driving motor drives the baffle 51 to rotate and open to the side wall of the second feed bin 32, the baffle 51 is embedded in the special-shaped through hole. In order to facilitate the collection of the material pile, the second feed bin 32 is trumpet-shaped.

[0058] As another specific implementation of a harmless cow dung treatment process provided in the application, the U-shaped shaping bin 5 includes a bin frame 52, a bin plate 53 is slidably mounted on the upper end of the bin frame 52 through a spring, the bin plates 53 are fixedly connected on both sides of the bin frame 52, a drive motor is fixedly mounted on the bin frame 52, an eccentric wheel 54 is mounted on the output end of the drive motor, and the side of the eccentric wheel 54 is in contact with the bin plate 53 at the upper end of the bin frame 52.

[0059] In combination with specific usage scenarios, a movable bin plate 53 is provided, and through the cooperation of a spring and an eccentric wheel 54, the bin plate 53 can be used to beat and compact the material in the U-shaped shaping bin 5 during movement, thereby increasing the compactness of material stacking and reducing the possibility of loosening and collapse of materials after the U-shaped shaping bin 5 discharges the materials.

[0060] Furthermore, the height of the end surface of the U-shaped shaping bin 5 gradually decreases from the front end to the rear end, and the bin plate 53 is hinged to the rear end of the bin frame 52 .

[0061] It should be understood that by setting the end surface height of the U-shaped shaping bin 5 to gradually decrease from the front end to the rear end, more materials can enter the front end of the U-shaped shaping bin 5, which is convenient for the bin plate 53 at the rear to be beaten and compacted.

[0062] Furthermore, a front end of the bin plate 53 at the upper end of the bin frame 52 is fixedly connected with an arc-shaped plate 531 with the hinge axis of the bin plate 53 as the central axis, and the outer side surface of the arc-shaped plate 531 fits the flip bin 2.

[0063] It should be understood that by providing the arc-shaped plate 531 , a seal is formed at the position close to the bin plate 53 and the tipping bin 2 , thereby reducing the possibility of material leakage during the movement of the bin plate 53 .

[0064] In some feasible embodiments, the bin rack 52 is a frame formed by fixedly connecting rectangular tubes, the bin plate 53 is in the shape of a rectangular plate, the upper bin plate 53 is hinged to the rear end of the bin rack 52, and the front end of the bin plate 53 is fixedly connected to the arc plate 531. The arc plate 531 takes the hinge axis of the bin plate 53 as the central axis and the outer side is in contact with the tipping bin 2, so that the bin plate 53 is always in contact with the tipping bin 2 during the movement. At the same time, the upper ends of the bin plates 53 on both sides of the bin rack 52 are provided with closing plates, which are in contact with the sides of the bin plates 53 at the upper end of the bin rack 52, thereby reducing the possibility of gaps in the bin plates 53 during the movement, which may cause material leakage.

[0065] As a specific implementation method of a harmless cow dung treatment process provided in the application, an aerobic fermentation bin is provided with an exhaust pipe, the exhaust pipe is connected to an input exhaust fan, the output end of the exhaust pipe is connected to a spray tower, the spray tower is connected to a spray pool, and a deodorant aqueous solution is provided in the spray pool.

[0066] It should be understood that during the aerobic fermentation process, harmful gases with pungent odors, including ammonia and hydrogen sulfide, will be produced. By setting up a spray tower, the produced gases can be sprayed and deodorized with a deodorant to reduce the hazards of emissions.

[0067] In some possible embodiments, the deodorant is a cationic surfactant in the prior art, which is used to remove odors.

[0068] Furthermore, a dust collector is provided at the gas input end of the spray tower, and an activated carbon adsorption chamber is provided at the gas output end of the spray tower.

[0069] It should be understood that by providing a dust collector, particulate matter carried during gas discharge can be reduced, and by providing an activated carbon adsorption chamber, the output gas can be further adsorbed to further reduce odor.

[0070] In some feasible embodiments, the aerobic fermentation chamber is in the shape of a warehouse, an air inlet is provided at one end of the aerobic fermentation chamber, and a plurality of exhaust fans are provided at the other end, and the output end of the exhaust fan is connected to the dust collector through a pipeline.

[0071] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A harmless cow dung treatment process, characterized in that: include: Collect manure and separate it into slurry and solid through solid-liquid separation equipment; The manure slurry is transported into the anaerobic fermentation tank for anaerobic fermentation. During the fermentation process, the manure slurry forms biogas, biogas liquid and biogas residue; The manure solids are transported to the material mixing bin for crushing and mixing with the straw, and the mixed manure solids and straw mixture is transported to the aerobic fermentation bin; Spraying the biogas slurry produced after the manure slurry is fermented into the aerobic fermentation bin to adjust the water content of the mixture of manure solids and straw; The biogas residue produced after the fermentation of the manure slurry is turned over and mixed with the manure solid straw mixture, and after mixing, it is piled in strips for fermentation; The generated biogas is dehydrated and desulfurized before being used as fuel gas, and the solid mixture is fermented and made into fertilizer for use; The mixing of the biogas residue and the solid straw mixture is performed by a mixing device, which includes: A travel rail, which is installed on the floor of the aerobic fermentation bin; A turning bin, wherein a first feeding bin is arranged at the upper end of the turning bin, and a discharge port of the turning bin faces the ground of the aerobic fermentation bin; A stirring shaft frame, the stirring shaft frame is rotatably installed in the tipping bin, the stirring shaft frame is connected to a driving motor and is used for stirring solid materials; A second feeding bin, the second feeding bin is arranged at the lower side of the front end of the flipping bin; A U-shaped shaping bin, the U-shaped shaping bin is fixedly mounted on the lower side of the rear end of the flipping bin, and the discharge port of the flipping bin is located on the upper side of the U-shaped shaping bin; Traveling wheels are provided at the bottom of the tipping bin, the second feeding bin and the U-shaped shaping bin. The traveling wheels are provided on the traveling rails and are connected to a driving motor.

2. The harmless cow dung treatment process according to claim 1 is characterized in that: A baffle is detachably provided at the rear end of the second feed bin, and the discharge port of the flip bin is located at the rear side of the baffle.

3. The harmless cow dung treatment process according to claim 2 is characterized in that: The U-shaped shaping bin includes a bin frame, a bin plate is slidably mounted on the upper end of the bin frame via a spring, the bin plates are fixedly connected on both sides of the bin frame, a drive motor is fixedly mounted on the bin frame, an eccentric wheel is mounted on the output end of the drive motor, and the side surface of the eccentric wheel is in contact with the bin plate at the upper end of the bin frame.

4. The harmless cow dung treatment process according to claim 3 is characterized in that: The height of the end surface of the U-shaped shaping bin gradually decreases from the front end to the rear end, and the bin plate is hinged to the rear end of the bin frame.

5. The harmless cow dung treatment process according to claim 4 is characterized in that: The front end of the bin plate at the upper end of the bin frame is fixedly connected with an arc-shaped plate with the bin plate hinge axis as the central axis, and the outer side surface of the arc-shaped plate fits the flip bin.

6. The harmless cow dung treatment process according to claim 4 is characterized in that: There are two baffles, which are respectively hinged to two sides of the rear end of the second feed bin, and the baffles are provided with a driving motor.

7. The harmless cow dung treatment process according to claim 1 is characterized in that: The aerobic fermentation bin is provided with an exhaust pipe, the exhaust pipe is connected to an input exhaust fan, the output end of the exhaust pipe is connected to a spray tower, the spray tower is connected to a spray pool, and a deodorant aqueous solution is provided in the spray pool.

8. The harmless cow dung treatment process according to claim 7 is characterized in that: A dust collector is arranged at the gas input end of the spray tower, and an activated carbon adsorption chamber is arranged at the gas output end of the spray tower.

9. The harmless cow dung treatment process according to claim 1, characterized in that: The aerobic fermentation bin comprises a mixed fermentation area and an independent fermentation area. The mixed fermentation area is used to ferment the stirred mixture of biogas residue and solid manure and straw, and the independent fermentation area is used to ferment either the biogas residue or the mixture of solid manure and straw.

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