Biogas residue oxidation fertilizer preparation method and complete equipment

Abstract

The invention relates to the technical field of biogas residue oxidation fertilizer production, in particular to a biogas residue oxidation fertilizer production method and complete equipment, the complete equipment comprises a first cylinder and a first feed hopper, the right end of the first cylinder is provided with a discharge port, and the first feed hopper is communicated with the left part of the top end of the first cylinder; the device further comprises a conveying device, an extruding device, a drying device, a heating device, a screen, a collecting tank, a second barrel and a first spiral blade, the screen is arranged at the bottom end of the first barrel in a communicating mode, the collecting tank is installed on the lower portion of the outer side wall of the first barrel, the second barrel is rotatably installed in the first barrel, and the left end and the right end of the second barrel extend out of the first barrel correspondingly; the first spiral blade is arranged on the outer side wall of the second barrel in a sleeving mode, and a conveying device is arranged in the second barrel and used for conveying raw materials; the convenience of biogas residue oxidation fertilizer preparation is improved, the utilization rate of biogas residue heat and biogas residue processing heat is increased, the temperature of raw materials added into the biogas digester is increased, and the biogas production efficiency of the biogas digester is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of biogas residue oxidation fertilizer production, and in particular to a biogas residue oxidation fertilizer production method and complete equipment. Background Art

[0002] Biogas residue refers to the sludge collected from the bottom of the biogas pool and the residue produced by fermentation during the biogas fermentation process. It is rich in organic matter, nitrogen, phosphorus, potassium and other nutrients. It also contains a high number of microorganisms and a variety of beneficial microorganisms. After processing, biogas residue can be used as a high-quality compound fertilizer.

[0003] At present, in the process of oxidizing biogas residue to make fertilizer, such as the invention patent with the prior art application number CN202210162026.0, the invention discloses a biogas residue sludge fertilizer making system and process, which belongs to the field of environmental protection technology. It includes a biogas residue sludge receiving system, a straw auxiliary material storage system, a mixing device, and a biomass drying bin. The top of the mixing device is provided with a biogas residue sludge inlet and a straw auxiliary material inlet, and the bottom is provided with a mixture discharge port. The biogas residue sludge receiving system is composed of a biogas residue transfer container, a screw pump, and a conveying pipeline. The discharge port is reserved at the bottom of the biogas residue transfer container, and the biogas residue sludge is transported to the biogas residue sludge inlet at the top of the mixing device through a screw pump and a conveying pipeline.

[0004] However, when the equipment in this process was used, it was found that after the sludge in the biogas digester was discharged, new materials usually needed to be added into the biogas digester in time to facilitate the continuous preparation of biogas. Since the suitable temperature range of high-temperature biogas digesters is 38-55°C, this equipment is not convenient for preheating the materials to be added into the biogas digester using the temperature when the sludge is discharged, and is not convenient for preheating the materials to be added into the biogas digester using the heat when the sludge is dried, which reduces the energy utilization rate and the heating effect on the raw materials added into the biogas digester. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method and complete set of equipment for making fertilizer by oxidizing biogas residue, which can improve the convenience of making fertilizer by oxidizing biogas residue, improve the utilization rate of biogas residue heat and biogas residue processing heat, increase the temperature of raw materials added into a biogas digester, and improve the gas production efficiency of a biogas digester.

[0006] The fertilizer production equipment of biogas residue oxidation of the present invention comprises a first cylinder and a first feeding hopper, a discharge outlet is arranged at the right end of the first cylinder, and the first feeding hopper is connected and arranged at the left part of the top end of the first cylinder; it also comprises a conveying device, an extruding device, a drying device, a heating device, a screen, a collecting trough, a second cylinder and a first spiral blade, the screen is connected and arranged at the bottom end of the first cylinder, the collecting trough is installed at the lower part of the outer wall of the first cylinder, the second cylinder is rotatably installed inside the first cylinder, and the left and right ends of the second cylinder extend out of the first cylinder respectively, the first spiral blade is sleeved on the outer wall of the second cylinder, a conveying device is arranged in the second cylinder, the conveying device is used to convey the raw materials, and the conveying device is used to drive the second cylinder to rotate, the extruding device is arranged at the discharge outlet of the first cylinder, the extruding device is used to dry the biogas residue, the drying device is communicated with the opening of the first cylinder, the drying device is used to dry and crush the biogas residue, the heating device is arranged at the left end of the second cylinder, and the heating device is used to heat the raw materials for secondary use; the biogas residue is put into the first cylinder through the first feeding hopper, and at the same time, the biogas residue to be added to the biogas residue is The mixed raw materials in the biogas pool are put into the second cylinder, and the conveying device is started to convey the raw materials from right to left in the second cylinder. Then the raw materials conveyed to the left by the second cylinder are discharged into the heating device, and at the same time the conveying device drives the second cylinder to rotate. After the second cylinder rotates, it drives the first spiral blade to rotate, so that the first spiral blade conveys the sludge added to the first cylinder from left to right. The second cylinder is heated during the transportation of the sludge, and the raw materials conveyed inside are preheated through heat conduction of the second cylinder. While the sludge is conveyed in the first cylinder, it is separated into solid and liquid through the extrusion device, and the separated liquid is discharged into the collecting tank through the screen. The solid sludge is discharged through the opening at the right end of the first cylinder, and then the sludge is conveyed to the drying device, so that the drying device further dries the sludge and crushes it at the same time, thereby improving the convenience of oxidizing the sludge to make fertilizer, and the drying heat is conveyed to the heating device, so that the heating device reheats the raw materials discharged from the second cylinder, thereby improving the utilization rate of the sludge heat and the sludge processing heat, increasing the temperature of the raw materials added to the biogas pool, and improving the gas production efficiency of the biogas pool.

[0007] Preferably, the drying device comprises a lifting device, a blowing device, a processing box, an exhaust hood, a discharge door, a spline sleeve, a spline shaft, multiple sets of blades, a first motor, a porous plate, multiple sets of telescopic rods and multiple sets of first springs. A lifting device is provided on the processing box, and the lifting device is used to transport the sludge discharged from the right end of the first cylinder into the processing box. The exhaust hood is connected to the top of the processing box, and the discharge door is connected to the lower part of the outer wall of the processing box. The spline sleeve is rotatably installed at the bottom of the processing box, and the bottom end of the spline shaft is slidably installed on the spline sleeve up and down. The top end of the spline shaft is rotatably connected to the porous plate, and the porous plate is slidably installed up and down on the inner wall of the processing box. The multiple sets of blades are all installed on the outer wall of the spline shaft, the first motor is installed at the bottom of the processing box, the output end of the first motor is connected to the spline sleeve, the output end of the blowing device is connected to the processing box, the blowing device is used to blow hot air in the processing box, the top ends of the multiple sets of telescopic rods are connected to the inner wall of the processing box, and the bottom ends of the multiple sets of telescopic rods are connected to the top of the porous plate Then, multiple groups of first springs are respectively fitted on the outer walls of multiple groups of telescopic rods; the sludge discharged from the first cylinder is transported to the interior of the processing box through the lifting device, and the first motor is turned on to drive the spline sleeve to rotate. After the spline sleeve rotates, it drives the spline shaft to rotate, so that the spline shaft drives multiple groups of blades to crush the sludge in the processing box, and at the same time, the blowing device transports hot air to the interior of the processing box, so that the sludge is further dried in the processing box, and then the hot air is transported to the heating device through the exhaust hood for secondary utilization, thereby improving the convenience of the equipment to heat the raw materials while processing the sludge, and improving energy utilization. The blowing device is intermittently controlled to blow air into the processing box. When blowing air into the processing box, the air pushes the porous plate to move upward, so that the porous plate drives the spline shaft to move upward, and when the blowing stops, the porous plate is pushed downward by the multiple groups of telescopic rods, and this reciprocating process is repeated, so that the spline shaft drives the multiple groups of blades to move up and down, thereby improving the crushing effect and efficiency of the sludge.

[0008] Preferably, the conveying device includes a driving device, a bracket, a third cylinder, a second feed hopper, a rotating shaft and a second spiral blade, the third cylinder is mounted on the bracket, the right end of the second cylinder is rotationally connected to the left end of the third cylinder, and the second cylinder is communicated with the third cylinder, the second feed hopper is connected and arranged at the top of the third cylinder, the right part of the rotating shaft is rotationally mounted on the third cylinder, the left part of the rotating shaft is rotationally extended into the second cylinder, the second spiral blade is mounted on the outer side wall of the rotating shaft, and the driving device is mounted on the bracket, and the driving device is used to drive the rotating shaft and the second cylinder to rotate in opposite directions; the raw materials to be added to the biogas tank are put into the third cylinder through the second feed hopper, and the second cylinder and the rotating shaft are driven to rotate in opposite directions by the driving device. After the rotating shaft rotates, it drives the second spiral blade to rotate, so that the second spiral blade transports the raw materials in the third cylinder and the second cylinder to the left, and after the second cylinder rotates, it drives the first spiral blade to rotate, so that the first spiral blade transports the biogas residue in the first cylinder to the right, thereby improving the convenience of heat exchange and transportation between the biogas residue and the raw materials.

[0009] Preferably, the extrusion device includes multiple groups of guide columns, multiple groups of second springs, extrusion plates, collecting boxes and multiple groups of fixed seats, the multiple groups of fixed seats are all installed on the outer wall of the first cylinder, the multiple groups of guide columns are respectively slidably installed on the multiple groups of fixed seats, the multiple groups of second springs are respectively fitted on the outer walls of the multiple groups of guide columns, the extrusion plate is arranged at the opening at the right end of the first cylinder, the extrusion plate is connected to the ends of the multiple groups of guide columns, the collecting box is arranged below the extrusion plate, and the collecting box is communicated with the opening of the first cylinder; the multiple groups of guide columns are pushed to move to the left by the multiple groups of second springs, so that the multiple groups of guide columns provide a leftward pulling force to the extrusion plate, and when the sludge in the first cylinder is discharged, the sludge is squeezed by the extrusion plate, thereby improving the solid-liquid separation effect of the sludge and the biogas liquid, and improving the convenience of drying the sludge, and then the solid sludge is collected through the collecting box.

[0010] Preferably, the heating device includes a heating box, an exhaust pipe, a guide plate, a conveying pipe, an air box and multiple groups of heat exchange pipes. The heating box is arranged below the left end of the second cylinder, and the exhaust pipe is connected to the lower part of the outer wall of the heating box. Multiple groups of guide plates are installed on the inner wall of the heating box in staggered positions. The input end of the conveying pipe is connected with the exhaust hood, and the output end of the conveying pipe is connected with the air box. The air box is installed on the outer wall of the heating box, and multiple groups of heat exchange pipes are connected with the air box, and the multiple groups of heat exchange pipes all pass through the interior of the heating box; the raw material discharged from the left end of the second cylinder falls into the interior of the heating box, and the hot air in the treatment box is conveyed to the interior of the conveying pipe through the exhaust hood, so that the conveying pipe conveys the hot air through the air box to the multiple groups of heat exchange pipes, and the multiple groups of heat exchange pipes are heated by the hot air, so that the multiple groups of heat exchange pipes heat the raw materials conveyed in the heating box, and the raw materials are guided and conveyed by the multiple groups of guide plates, so as to improve the heat exchange effect between the raw materials and the multiple groups of heat exchange pipes and improve the heating effect of the raw materials.

[0011] Preferably, the driving device includes a second motor, a gear, a toothed ring, two sets of pulleys and a belt. The second motor is mounted on a bracket, the gear is mounted on the left output end of the second motor, the toothed ring is sleeved on the outer wall of the second cylinder, the toothed ring is meshed with the gear, the first set of pulleys is mounted on the right output end of the second motor, the second set of pulleys is mounted on the right end of the rotating shaft, and the belt is sleeved on the outer walls of the two sets of pulleys; the gear and the first set of pulleys are driven to rotate by the second motor, and after the gear rotates, it drives the second cylinder to rotate by meshing with the toothed ring, so that the first spiral blade rotates to transport the sludge, and after the first set of pulleys rotates, the rotating shaft is driven to rotate by the belt, so that the second spiral blade transports the raw materials in the second cylinder, thereby improving the convenience of the equipment for simultaneously conveying different materials.

[0012] Preferably, the blowing device includes a bellows, multiple groups of air ducts, a fan and multiple groups of filters, the input ends of the multiple groups of air ducts are all connected to the bellows, and electric heating wires are provided in the bellows, the output end of the fan is connected to the bellows, and the multiple groups of filters are respectively connected and arranged at the exhaust ports of the multiple groups of air ducts; the inside of the bellows is heated by the electric heating wire, so that the fan transports the hot air to the inside of the processing box through the multiple groups of air ducts, thereby improving the convenience of further drying and processing of the sludge in the processing box, and improving the convenience of the heating device to heat the raw materials with hot air, and by controlling the intermittent blowing of the fan, the porous plate moves up and down, thereby improving the crushing effect of the sludge and improving the quality of sludge fertilizer making.

[0013] Preferably, it also includes a filter box and an activated carbon layer. The filter box is connected and arranged at the exhaust port of multiple groups of heat exchange tubes, and the activated carbon layer is arranged inside the filter box. The multiple groups of heat exchange tubes discharge air into the filter box, and the air is filtered through the activated carbon layer, so that the filtered air is discharged outward, thereby reducing the spread of odor in the sludge.

[0014] Preferably, the lifting device includes a conveying auger, the input end of the conveying auger is connected to the collecting box, and the output end of the conveying auger is connected to the processing box; the sludge collected in the collecting box is lifted and transported to the processing box by the conveying auger, thereby improving the automation of the equipment and improving the working efficiency of the equipment.

[0015] A method for producing fertilizer by oxidation of biogas residue comprises the following steps:

[0016] Step 1: Collect the biogas residue, collect the biogas residue slurry in the biogas tank, put the collected slurry into the equipment for solid-liquid separation, and at the same time add the mixed raw materials to be added to the biogas tank into the equipment, and use the temperature of the biogas residue slurry to perform the first preheating treatment on the mixed raw materials;

[0017] Step 2: Collect the solid materials of the biogas residue after solid-liquid separation, and use the equipment to perform secondary drying on the collected biogas residue solid materials. The drying temperature is 40-50°C and the drying time is 15-20min. At the same time, the equipment crushes the biogas residue solid materials;

[0018] Step 3: collect the mixed raw materials after the first preheating, and use the heat from the second drying of the biogas slag solid material to perform a second preheating treatment on the mixed raw materials to further increase the temperature of the mixed raw materials;

[0019] Step 4: Collect the crushed solid biogas residue materials and put them into the oxidation reactor for composting. Pile the biogas residue with a moisture content of 50%-60% into the oxidation reactor, then add 0.5 kg of ammonium bicarbonate to every 1000 kg of the biogas residue and mix them evenly. Cover the top layer of the biogas residue with an insulation film. The composting temperature is 40-50°C and the composting time is 7-10 days.

[0020] Step 5: Add the mixed raw materials after secondary preheating into the biogas tank;

[0021] Step 6: Discharge the oxidized biogas residue fertilizer, cool it, and screen out large impurities and large particles therein;

[0022] Step seven: package and store the screened biogas residue fertilizer.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: biogas residue is put into the first cylinder through the first feeding hopper, and mixed raw materials to be added to the biogas pool are put into the second cylinder at the same time, and the conveying device is started to convey the raw materials from right to left in the second cylinder, and then the raw materials conveyed to the left by the second cylinder are discharged into the heating device, and at the same time, the conveying device drives the second cylinder to rotate, and after the second cylinder rotates, the first spiral blade is driven to rotate, so that the first spiral blade conveys the biogas residue added to the first cylinder from left to right, and the second cylinder is heated during the biogas residue conveying process, and the second cylinder is heated by heat conduction from the second cylinder. The raw materials transported internally are preheated, and the sludge is transported in the first cylinder while being separated into solid and liquid through an extrusion device. The separated liquid is discharged into the collecting tank through a screen, and the solid sludge is discharged through an opening at the right end of the first cylinder. The sludge is then transported to a drying device, which further dries the sludge while crushing it, thereby improving the convenience of oxidizing the sludge to make fertilizer. The heat from the drying is transported to a heating device, which reheats the raw materials discharged from the second cylinder, thereby improving the utilization rate of the sludge heat and the sludge processing heat, increasing the temperature of the raw materials added to the biogas digester, and improving the gas production efficiency of the biogas digester. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the axonometric structure of the present invention;

[0025] Figure 2 is an axonometric structural diagram of the connection between the second cylinder and the first spiral blade, etc.;

[0026] Figure 3 It is a schematic diagram of the axonometric local structure of the connection between the spline sleeve and the spline shaft;

[0027] Figure 4 It is a side view schematic diagram of the partial structure of the connection between the collection box and the conveying auger, etc.;

[0028] Figure 5 It is a schematic diagram of the partial axonometric structure of the connection between the third cylinder and the second feed hopper;

[0029] Figure 6 is a schematic diagram of the partial isometric structure of the connection between the second motor and the gear etc.;

[0030] Figure 7 It is a schematic diagram of the axonometric structure of the connection between the bellows and the air duct;

[0031] Figure 8is an axonometric structural diagram of the connection between the first cylinder and the collecting tank, etc.;

[0032] Fig. 9 is an axonometric structural diagram of the connection between the bracket and the second motor, etc.;

[0033] Fig.10 It is a schematic diagram of the axonometric structure of the connection between the processing box and the discharge door.

[0034] Markings in the attached drawings: 1, first cylinder; 2, first feed hopper; 3, screen; 4, collecting tank; 5, second cylinder; 6, first spiral blade; 7, processing box; 8, exhaust hood; 9, discharge door; 10, spline sleeve; 11, spline shaft; 12, blade; 13, first motor; 14, perforated plate; 15, telescopic rod; 16, first spring; 17, bracket; 18, third cylinder; 19, second feed hopper; 20, rotating shaft; 21, second spiral blade; 2 2. Guide column; 23. Second spring; 24. Extrusion plate; 25. Collecting box; 26. Heating box; 27. Exhaust pipe; 28. Guide plate; 29. ​​Delivery pipe; 30. Air box; 31. Heat exchange tube; 32. Second motor; 33. Gear; 34. Gear ring; 35. Pulley; 36. Belt; 37. Bellows; 38. Air duct; 39. Fan; 40. Filter; 41. Filter box; 42. Activated carbon layer; 43. Delivery auger; 44. Fixed seat. DETAILED DESCRIPTION

[0035] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0036] Example 1

[0037] like Figures 1 to 10As shown, a complete set of biogas residue oxidation fertilizer production equipment of the present invention comprises a first cylinder 1 and a first feed hopper 2, a discharge outlet is arranged at the right end of the first cylinder 1, and the first feed hopper 2 is connected and arranged at the left part of the top end of the first cylinder 1; it also comprises a conveying device, an extrusion device, a drying device, a heating device, a screen 3, a collecting tank 4, a second cylinder 5 and a first spiral blade 6, the screen 3 is connected and arranged at the bottom end of the first cylinder 1, the collecting tank 4 is installed at the lower part of the outer wall of the first cylinder 1, the second cylinder 5 is rotatably installed inside the first cylinder 1, and the left and right ends of the second cylinder 5 extend out of the first cylinder 1 respectively, the first spiral blade 6 is sleeved on the outer wall of the second cylinder 5, a conveying device is arranged in the second cylinder 5, the conveying device is used to convey the raw material, and the conveying device is used to drive the second cylinder 5 to rotate, the extrusion device is arranged at the discharge outlet of the first cylinder 1, the extrusion device is used to dry the biogas residue, the drying device is connected to the opening of the first cylinder 1, the drying device is used to dry and crush the biogas residue, the heating device is arranged at the left end of the second cylinder 5, and the heating device is used to heat the raw material for secondary heating;

[0038] like Figure 3 , Figure 4 and Fig.10 As shown, the drying device includes a lifting device, a blowing device, a processing box 7, an exhaust hood 8, a discharge door 9, a spline sleeve 10, a spline shaft 11, multiple sets of blades 12, a first motor 13, a perforated plate 14, multiple sets of telescopic rods 15 and multiple sets of first springs 16. The processing box 7 is provided with a lifting device, and the lifting device is used to transport the sludge discharged from the right end of the first cylinder 1 to the processing box 7. The exhaust hood 8 is connected to the top of the processing box 7, and the discharge door 9 is connected to the lower part of the outer wall of the processing box 7. The spline sleeve 10 is rotatably installed at the bottom of the processing box 7, and the bottom end of the spline shaft 11 is slidably installed on the spline sleeve 10, the top of the spline shaft 11 is rotatably connected with the porous plate 14, the porous plate 14 is slidably installed on the inner wall of the processing box 7, multiple sets of blades 12 are installed on the outer wall of the spline shaft 11, the first motor 13 is installed at the bottom of the processing box 7, the output end of the first motor 13 is connected with the spline sleeve 10, the output end of the blowing device is connected with the processing box 7, the blowing device is used to blow hot air into the processing box 7, the tops of multiple sets of telescopic rods 15 are connected with the inner wall of the processing box 7, the bottoms of multiple sets of telescopic rods 15 are connected with the top of the porous plate 14, and multiple sets of first springs 16 are respectively fitted on the outer walls of multiple sets of telescopic rods 15;

[0039] In this embodiment, the biogas residue is placed in the first cylinder 1 through the first feed hopper 2, and the mixed raw materials to be added to the biogas digester are placed in the second cylinder 5. The conveying device is started to convey the raw materials from right to left in the second cylinder 5. Then the raw materials conveyed to the left by the second cylinder 5 are discharged into the heating device. At the same time, the conveying device drives the second cylinder 5 to rotate. After the second cylinder 5 rotates, it drives the first spiral blade 6 to rotate, so that the first spiral blade 6 conveys the biogas residue added to the first cylinder 1 from left to right. During the biogas residue transportation process, the second cylinder 5 is heated, and the internal biogas residue is heated by heat conduction from the second cylinder 5. The raw materials transported from the first cylinder 1 are preheated, and the sludge is transported in the first cylinder 1 while being separated into solid and liquid by an extrusion device. The separated liquid is discharged into the collecting tank 4 through the screen 3, and the solid sludge is discharged through the opening at the right end of the first cylinder 1. The sludge is then transported to the drying device, which allows the drying device to further dry the sludge and crush it at the same time, thereby improving the convenience of oxidizing the sludge to make fertilizer, and the drying heat is transported to the heating device, which allows the heating device to reheat the raw materials discharged from the second cylinder 5, thereby improving the utilization rate of the sludge heat and the sludge processing heat, increasing the temperature of the raw materials added to the biogas digester, and improving the gas production efficiency of the biogas digester.

[0040] Example 2

[0041] like Figures 1 to 10 As shown, a biogas residue oxidation fertilizer production method and complete set of equipment of the present invention include a first cylinder 1 and a first feed hopper 2, a discharge outlet is provided at the right end of the first cylinder 1, and the first feed hopper 2 is connected and arranged at the left part of the top end of the first cylinder 1; it also includes a conveying device, an extrusion device, a drying device, a heating device, a screen 3, a collecting tank 4, a second cylinder 5 and a first spiral blade 6, the screen 3 is connected and arranged at the bottom end of the first cylinder 1, the collecting tank 4 is installed at the lower part of the outer wall of the first cylinder 1, the second cylinder 5 is rotatably installed inside the first cylinder 1, and the left and right ends of the second cylinder 5 extend out of the first cylinder 1 respectively, the first spiral blade 6 is sleeved on the outer wall of the second cylinder 5, a conveying device is provided in the second cylinder 5, the conveying device is used to convey the raw material, and the conveying device is used to drive the second cylinder 5 to rotate, the extrusion device is provided at the discharge outlet of the first cylinder 1, the extrusion device is used to dry the biogas residue, the drying device is connected to the opening of the first cylinder 1, the drying device is used to dry and crush the biogas residue, the heating device is provided at the left end of the second cylinder 5, and the heating device is used to heat the raw material for secondary heating;

[0042] like Figure 3 , Figure 4 and Fig.10As shown, the drying device includes a lifting device, a blowing device, a processing box 7, an exhaust hood 8, a discharge door 9, a spline sleeve 10, a spline shaft 11, multiple sets of blades 12, a first motor 13, a perforated plate 14, multiple sets of telescopic rods 15 and multiple sets of first springs 16. The processing box 7 is provided with a lifting device, and the lifting device is used to transport the sludge discharged from the right end of the first cylinder 1 to the processing box 7. The exhaust hood 8 is connected to the top of the processing box 7, and the discharge door 9 is connected to the lower part of the outer wall of the processing box 7. The spline sleeve 10 is rotatably installed at the bottom of the processing box 7, and the bottom end of the spline shaft 11 is slidably installed on the spline sleeve 10, the top of the spline shaft 11 is rotatably connected with the porous plate 14, the porous plate 14 is slidably installed on the inner wall of the processing box 7, multiple sets of blades 12 are installed on the outer wall of the spline shaft 11, the first motor 13 is installed at the bottom of the processing box 7, the output end of the first motor 13 is connected with the spline sleeve 10, the output end of the blowing device is connected with the processing box 7, the blowing device is used to blow hot air into the processing box 7, the tops of multiple sets of telescopic rods 15 are connected with the inner wall of the processing box 7, the bottoms of multiple sets of telescopic rods 15 are connected with the top of the porous plate 14, and multiple sets of first springs 16 are respectively fitted on the outer walls of multiple sets of telescopic rods 15;

[0043] like Figure 5 As shown, the conveying device includes a driving device, a bracket 17, a third cylinder 18, a second feed hopper 19, a rotating shaft 20 and a second spiral blade 21. The third cylinder 18 is installed on the bracket 17. The right end of the second cylinder 5 is rotatably connected with the left end of the third cylinder 18, and the second cylinder 5 is communicated with the third cylinder 18. The second feed hopper 19 is connected and arranged at the top of the third cylinder 18. The right part of the rotating shaft 20 is rotatably installed on the third cylinder 18, and the left part of the rotating shaft 20 is rotatably extended into the second cylinder 5. The second spiral blade 21 is installed on the outer wall of the rotating shaft 20. The driving device is installed on the bracket 17, and the driving device is used to drive the rotating shaft 20 and the second cylinder 5 to rotate in opposite directions.

[0044] like Figure 6 As shown, the extrusion device includes multiple groups of guide columns 22, multiple groups of second springs 23, extrusion plates 24, collection boxes 25 and multiple groups of fixed seats 44. The multiple groups of fixed seats 44 are all installed on the outer wall of the first cylinder 1. The multiple groups of guide columns 22 are respectively slidably installed on the multiple groups of fixed seats 44. The multiple groups of second springs 23 are respectively fitted on the outer walls of the multiple groups of guide columns 22. The extrusion plate 24 is arranged at the right end opening of the first cylinder 1. The extrusion plate 24 is connected to the ends of the multiple groups of guide columns 22. The collection box 25 is arranged below the extrusion plate 24, and the collection box 25 is communicated with the opening of the first cylinder 1.

[0045] like Figure 1As shown, the heating device includes a heating box 26, a discharge pipe 27, a guide plate 28, a delivery pipe 29, an air box 30 and a plurality of groups of heat exchange pipes 31. The heating box 26 is arranged below the left end of the second cylinder 5. The discharge pipe 27 is arranged in communication with the lower part of the outer wall of the heating box 26. The plurality of groups of guide plates 28 are respectively and staggeredly installed on the inner wall of the heating box 26. The input end of the delivery pipe 29 is connected to the exhaust hood 8, and the output end of the delivery pipe 29 is connected to the air box 30. The air box 30 is installed on the outer wall of the heating box 26. The plurality of groups of heat exchange pipes 31 are connected to the inside of the air box 30, and the plurality of groups of heat exchange pipes 31 all pass through the interior of the heating box 26.

[0046] like Figure 6 As shown, the driving device includes a second motor 32, a gear 33, a gear ring 34, two groups of pulleys 35 and a belt 36. The second motor 32 is mounted on the bracket 17, the gear 33 is mounted on the left output end of the second motor 32, the gear ring 34 is sleeved on the outer wall of the second cylinder 5, the gear ring 34 is meshed with the gear 33, the first group of pulleys 35 is mounted on the right output end of the second motor 32, the second group of pulleys 35 is mounted on the right end of the rotating shaft 20, and the belt 36 is sleeved on the outer walls of the two groups of pulleys 35;

[0047] like Figure 3 As shown, the blowing device includes a bellows 37, multiple groups of air ducts 38, a fan 39 and multiple groups of filters 40. The input ends of the multiple groups of air ducts 38 are all connected to the bellows 37, and a heating wire is arranged in the bellows 37. The output end of the fan 39 is connected to the bellows 37, and the multiple groups of filters 40 are respectively connected and arranged at the exhaust ports of the multiple groups of air ducts 38.

[0048] like Figure 1 As shown, it also includes a filter box 41 and an activated carbon layer 42. The filter box 41 is connected and arranged at the exhaust ports of the multiple groups of heat exchange tubes 31, and the activated carbon layer 42 is arranged inside the filter box 41;

[0049] like Figure 4 As shown, the lifting device includes a conveying auger 43, the input end of the conveying auger 43 is connected to the collection box 25, and the output end of the conveying auger 43 is connected to the processing box 7;

[0050] A method for producing fertilizer by oxidation of biogas residue comprises the following steps:

[0051] Step 1: Collect the biogas residue, collect the biogas residue slurry in the biogas tank, put the collected slurry into the equipment for solid-liquid separation, and at the same time add the mixed raw materials to be added to the biogas tank into the equipment, and use the temperature of the biogas residue slurry to perform the first preheating treatment on the mixed raw materials;

[0052] Step 2: Collect the solid materials of the biogas residue after solid-liquid separation, and use the equipment to perform secondary drying on the collected biogas residue solid materials. The drying temperature is 40-50°C and the drying time is 15-20min. At the same time, the equipment crushes the biogas residue solid materials;

[0053] Step 3: collect the mixed raw materials after the first preheating, and use the heat from the second drying of the biogas slag solid material to perform a second preheating treatment on the mixed raw materials to further increase the temperature of the mixed raw materials;

[0054] Step 4: Collect the crushed solid biogas residue materials and put them into the oxidation reactor for composting. Pile the biogas residue with a moisture content of 50%-60% into the oxidation reactor, then add 0.5 kg of ammonium bicarbonate to every 1000 kg of the biogas residue and mix them evenly. Cover the top layer of the biogas residue with an insulation film. The composting temperature is 40-50°C and the composting time is 7-10 days.

[0055] Step 5: Add the mixed raw materials after secondary preheating into the biogas tank;

[0056] Step 6: Discharge the oxidized biogas residue fertilizer, cool it, and screen out large impurities and large particles therein;

[0057] Step 7: Packing and storing the screened biogas residue fertilizer;

[0058] In the present embodiment, the sludge discharged from the first cylinder 1 is transported to the inside of the processing box 7 through the lifting device, and the first motor 13 is turned on to drive the spline sleeve 10 to rotate. After the spline sleeve 10 rotates, it drives the spline shaft 11 to rotate, so that the spline shaft 11 drives multiple sets of blades 12 to crush the sludge in the processing box 7. At the same time, the blowing device transports hot air to the inside of the processing box 7, so that the sludge is further dried in the processing box 7. After that, the hot air is transported to the heating device for secondary use through the exhaust hood 8, thereby improving the convenience of the equipment for heating the raw materials while processing the sludge, and improving energy utilization. The blowing device is intermittently controlled to blow air into the processing box 7. When blowing air into the processing box 7, the air pushes the porous plate 14 to move upward, so that the porous plate 14 carries The movable spline shaft 11 moves upward, and when the blowing stops, the porous plate 14 is pushed downward by multiple sets of telescopic rods 15, and this cycle repeats. As a result, the spline shaft 11 drives multiple sets of blades 12 to move up and down, thereby improving the crushing effect and efficiency of the sludge. The raw materials to be added to the biogas tank are placed into the third cylinder 18 through the second feed hopper 19, and the second cylinder 5 and the rotating shaft 20 are driven by the driving device to rotate in opposite directions. After the rotating shaft 20 rotates, it drives the second spiral blade 21 to rotate, so that the second spiral blade 21 transports the raw materials in the third cylinder 18 and the second cylinder 5 to the left. After the second cylinder 5 rotates, it drives the first spiral blade 6 to rotate, so that the first spiral blade 6 transports the sludge in the first cylinder 1 to the right, thereby improving the convenience of heat exchange and transportation between the sludge and the raw materials.

[0059] The present invention provides a complete set of equipment for making fertilizer by oxidation of biogas residue. When the equipment is in operation, the biogas residue is placed into the first cylinder 1 through the first feeding hopper 2, and the mixed raw materials to be added to the biogas pool are placed into the second cylinder 5. The conveying device is started to convey the raw materials from right to left in the second cylinder 5, and then the raw materials conveyed to the left by the second cylinder 5 are discharged into the heating device. At the same time, the conveying device drives the second cylinder 5 to rotate, and the second cylinder 5 drives the first spiral blade 6 to rotate after the rotation, so that the first spiral blade 6 conveys the biogas residue added to the first cylinder 1 from left to right. During the biogas residue conveying process, the second cylinder 5 is heated, and the raw materials conveyed inside are preheated through heat conduction of the second cylinder 5. While the biogas residue is conveyed in the first cylinder 1, it is separated from the solid by the extrusion device, and the separated liquid is discharged into the collecting tank 4 through the screen 3. The solid biogas residue is discharged through the opening at the right end of the first cylinder 1, and then the biogas residue is conveyed to the drying device, so that the drying device further dries the biogas residue and crushes it at the same time, and the drying heat is conveyed to the heating device, so that the heating device reheats the raw materials discharged from the second cylinder 5.

[0060] The main functions achieved by the present invention are: by utilizing the heat of the sludge itself and the heat of sludge processing to preheat the mixed raw materials to be added to the biogas digester multiple times, the heat utilization rate is improved, the temperature of the raw materials added to the biogas digester is increased, and the gas production efficiency of the biogas digester is improved; by preheating the mixed raw materials to be added to the biogas digester while separating the solid and liquid of the sludge, the working efficiency of the equipment is improved, and the convenience of making fertilizer from sludge is improved.

[0061] The first motor 13, the second motor 32, the fan 39 and the conveying auger 43 of the method for making fertilizer by oxidation of sludge and the complete set of equipment of the present invention are purchased on the market. The technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for the technicians in this field to make creative efforts.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A complete set of equipment for producing fertilizer from biogas residue oxidation, comprising a first cylinder (1) and a first feed hopper (2), wherein a discharge port is arranged at the right end of the first cylinder (1), and the first feed hopper (2) is connected and arranged at the left part of the top end of the first cylinder (1); characterized in that: The invention also comprises a conveying device, an extrusion device, a drying device, a heating device, a screen (3), a collecting tank (4), a second cylinder (5) and a first spiral blade (6); the screen (3) is arranged in communication with the bottom end of the first cylinder (1); the collecting tank (4) is installed at the lower part of the outer wall of the first cylinder (1); the second cylinder (5) is rotatably installed inside the first cylinder (1), and the left and right ends of the second cylinder (5) respectively extend outside the first cylinder (1); the first spiral blade (6) is sleeved on the outer wall of the second cylinder (5); a conveying device is arranged inside the second cylinder (5); the conveying device is used to convey the raw material, and the conveying device is used to drive the second cylinder (5) to rotate; the extrusion device is arranged at the discharge port of the first cylinder (1); the extrusion device is used to dry the biogas residue; the drying device is connected to the opening of the first cylinder (1); the drying device is used to dry and crush the biogas residue; the heating device is arranged at the left end of the second cylinder (5); the heating device is used to heat the raw material for the second time.

2. A complete set of biogas residue oxidation fertilizer production equipment as claimed in claim 1, characterized in that: The drying device comprises a lifting device, a blowing device, a processing box (7), an exhaust hood (8), a discharge door (9), a spline sleeve (10), a spline shaft (11), a plurality of blade groups (12), a first motor (13), a perforated plate (14), a plurality of telescopic rod groups (15) and a plurality of first spring groups (16). The processing box (7) is provided with a lifting device, and the lifting device is used to transport the biogas residue discharged from the right end of the first cylinder (1) into the processing box (7). The exhaust hood (8) is connected to the top of the processing box (7), and the discharge door (9) is connected to the lower part of the outer wall of the processing box (7). The spline sleeve (10) is rotatably mounted on the bottom of the processing box (7), and the bottom end of the spline shaft (11) is slidably mounted on the spline sleeve ( The invention relates to a processing box (7) comprising a plurality of first springs (16) and a plurality of second springs (16). The plurality of first springs (16) are mounted on the outer wall of the spline shaft (11). The first motor (13) is mounted on the bottom of the processing box (7). The output end of the first motor (13) is connected to the spline sleeve (10). The output end of the blowing device is connected to the processing box (7). The blowing device is used to blow hot air into the processing box (7). The top ends of the plurality of telescopic rods (15) are connected to the inner wall of the processing box (7). The bottom ends of the plurality of telescopic rods (15) are connected to the top of the porous plate (14). The plurality of first springs (16) are respectively fitted on the outer walls of the plurality of telescopic rods (15).

3. The complete set of biogas residue oxidation fertilizer production equipment according to claim 1, characterized in that: The conveying device comprises a driving device, a bracket (17), a third cylinder (18), a second feed hopper (19), a rotating shaft (20) and a second spiral blade (21); the third cylinder (18) is mounted on the bracket (17); the right end of the second cylinder (5) is rotatably connected to the left end of the third cylinder (18); the second cylinder (5) and the third cylinder (18) are in communication; the second feed hopper (19) is arranged in communication at the top of the third cylinder (18); the right part of the rotating shaft (20) is rotatably mounted on the third cylinder (18); the left part of the rotating shaft (20) is rotatably extended into the interior of the second cylinder (5); the second spiral blade (21) is mounted on the outer wall of the rotating shaft (20); the driving device is mounted on the bracket (17); and the driving device is used to drive the rotating shaft (20) and the second cylinder (5) to rotate in opposite directions.

4. The complete set of biogas residue oxidation fertilizer production equipment according to claim 1, characterized in that: The extrusion device comprises a plurality of guide columns (22), a plurality of second springs (23), an extrusion plate (24), a collection box (25) and a plurality of fixed seats (44). The plurality of fixed seats (44) are all mounted on the outer wall of the first cylinder (1). The plurality of guide columns (22) are respectively slidably mounted on the plurality of fixed seats (44). The plurality of second springs (23) are respectively fitted on the outer walls of the plurality of guide columns (22). The extrusion plate (24) is arranged at the right end opening of the first cylinder (1). The extrusion plate (24) is connected to the ends of the plurality of guide columns (22). The collection box (25) is arranged below the extrusion plate (24), and the collection box (25) is communicated with the opening of the first cylinder (1).

5. The complete equipment for producing fertilizer by oxidation of biogas residue according to claim 1, characterized in that: The heating device comprises a heating box (26), a discharge pipe (27), a guide plate (28), a delivery pipe (29), an air box (30) and a plurality of groups of heat exchange pipes (31); the heating box (26) is arranged below the left end of the second cylinder (5); the discharge pipe (27) is arranged in communication with the lower part of the outer wall of the heating box (26); the plurality of groups of guide plates (28) are respectively and alternately installed on the inner wall of the heating box (26); the input end of the delivery pipe (29) is connected to the exhaust hood (8); the output end of the delivery pipe (29) is connected to the air box (30); the air box (30) is installed on the outer wall of the heating box (26); the plurality of groups of heat exchange pipes (31) are connected to the inside of the air box (30), and the plurality of groups of heat exchange pipes (31) all pass through the interior of the heating box (26).

6. The complete equipment for producing fertilizer by oxidation of biogas residue as claimed in claim 3, characterized in that: The driving device comprises a second motor (32), a gear (33), a toothed ring (34), two groups of pulleys (35) and a belt (36), wherein the second motor (32) is mounted on a bracket (17), the gear (33) is mounted on a left output end of the second motor (32), the toothed ring (34) is sleeved on an outer side wall of a second cylinder (5), the toothed ring (34) is meshed with the gear (33), the first group of pulleys (35) is mounted on a right output end of the second motor (32), the second group of pulleys (35) is mounted on a right end of a rotating shaft (20), and the belt (36) is sleeved on the outer side walls of the two groups of pulleys (35).

7. The complete equipment for producing fertilizer by oxidation of biogas residue as claimed in claim 2, characterized in that: The blowing device comprises a bellows (37), a plurality of groups of air ducts (38), a fan (39) and a plurality of groups of filter screens (40); the input ends of the plurality of groups of air ducts (38) are all connected to the bellows (37), and a heating wire is arranged inside the bellows (37); the output end of the fan (39) is connected to the inside of the bellows (37), and the plurality of groups of filter screens (40) are respectively connected and arranged at the exhaust ports of the plurality of groups of air ducts (38).

8. The complete set of biogas residue oxidation fertilizer production equipment according to claim 5, characterized in that: It also comprises a filter box (41) and an activated carbon layer (42); the filter box (41) is arranged at the exhaust ports of the plurality of groups of heat exchange tubes (31) in communication, and the activated carbon layer (42) is arranged inside the filter box (41).

9. The complete set of biogas residue oxidation fertilizer production equipment according to claim 2, characterized in that: The lifting device comprises a conveying auger (43), the input end of the conveying auger (43) is connected to the collection box (25), and the output end of the conveying auger (43) is connected to the processing box (7).

10. A method for producing fertilizer by oxidation of biogas residue, characterized in that: Using the complete equipment for producing fertilizer by oxidation of biogas residue as claimed in any one of claims 1 to 9, the method comprises the following steps: Step 1: Collect the biogas residue, collect the biogas residue slurry in the biogas tank, put the collected slurry into the equipment for solid-liquid separation, and at the same time add the mixed raw materials to be added to the biogas tank into the equipment, and use the temperature of the biogas residue slurry to perform the first preheating treatment on the mixed raw materials; Step 2: Collect the solid materials of the biogas residue after solid-liquid separation, and use the equipment to perform secondary drying on the collected biogas residue solid materials. The drying temperature is 40-50°C and the drying time is 15-20min. At the same time, the equipment crushes the biogas residue solid materials; Step 3: collect the mixed raw materials after the first preheating, and use the heat from the second drying of the biogas slag solid material to perform a second preheating treatment on the mixed raw materials to further increase the temperature of the mixed raw materials; Step 4: Collect the crushed solid biogas residue materials and put them into the oxidation reactor for composting. Pile the biogas residue with a moisture content of 50%-60% into the oxidation reactor, then add 0.5 kg of ammonium bicarbonate to every 1000 kg of the biogas residue and mix them evenly. Cover the top layer of the biogas residue with an insulation film. The composting temperature is 40-50°C and the composting time is 7-10 days. Step 5: Add the mixed raw materials after secondary preheating into the biogas tank; Step 6: Discharge the oxidized biogas residue fertilizer, cool it, and screen out large impurities and large particles therein; Step seven: package and store the screened biogas residue fertilizer.

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