A method and separation device for the coordinated disposal of chicken manure biogas slurry and mushroom residue

Abstract

The present invention discloses a method and separation equipment for the coordinated disposal of chicken manure biogas and mushroom residue, and relates to the technical field of organic fertilizer processing. The method comprises the following steps: transporting mushroom residue, flocculant, and primary biogas to a mixing and stirring tank for thorough stirring; then subjecting the obtained mixture to solid-liquid separation, transporting the biogas residue obtained by the solid-liquid separation to an organic fertilizer or greening matrix workshop for processing the organic fertilizer or greening matrix material; a portion of the obtained secondary biogas is sent to farmland for disposal as biogas fertilizer, and the other portion is reused as anaerobic system dilution water in the chicken manure anaerobic fermentation process. The present invention adopts a method and separation equipment for the coordinated disposal of chicken manure biogas and mushroom residue of the above structure, which solves the problem of the difficulty in farmland disposal of the primary biogas generated after anaerobic fermentation and primary solid-liquid separation of chicken manure. At the same time, the mushroom residue absorbs suspended matter in the primary biogas, thereby increasing the organic matter content. When used to produce organic fertilizer or greening matrix material, the amount of organic matter added can be saved, thereby reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of organic fertilizer processing, and in particular to a method for co-processing chicken manure biogas slurry and mushroom residue and a separation device. Background Art

[0002] Due to the viscous nature of chicken manure and its high organic matter content, anaerobic fermentation produces a mixture that is difficult to separate into solids and liquids. The combined TS value of all solid components in the biogas slurry after solid-liquid separation is approximately 7%. This high TS value leads to eutrophication and makes biogas disposal difficult. Large-scale biogas disposal is often done through surrounding farmland. High TS concentrations in chicken manure slurry often cause seedling burn and are unsuitable for drip irrigation, a method favored by modern agriculture, as the presence of viscous suspended solids can clog sprinkler nozzles and pipes.

[0003] Mushroom bags are made from materials like sawdust, straw, and corn stalks. After the bags are discarded during mushroom production, they become mushroom residue. Most mushroom residue contains little organic matter, as its nutrients are absorbed during the production process. Mushroom residue, a form of agricultural organic waste, is lightweight, porous, and can be used to make organic fertilizer or landscaping substrate. However, this process requires the addition of sufficient organic matter, which increases the production cost.

[0004] In order to solve the above problems, the present invention provides a method for co-disposal of chicken manure biogas slurry and mushroom residue and a separation device. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and separation equipment for the coordinated disposal of chicken manure biogas slurry and mushroom residue, so as to solve the problem of difficulty in farmland disposal of the primary biogas slurry generated after anaerobic fermentation and primary solid-liquid separation of chicken manure, and at the same time, reduce the cost of producing organic fertilizer or greening matrix material using mushroom residue.

[0006] To achieve the above object, the present invention provides a method for the coordinated disposal of chicken manure biogas slurry and mushroom residue, comprising the following steps:

[0007] Step 1: Anaerobic fermentation of chicken manure is performed, and the resulting mixture is subjected to solid-liquid separation to obtain primary biogas slurry that may cause seedling burn;

[0008] Step 2: Crush the mushroom residue;

[0009] Step 3: Select the type of flocculant;

[0010] Step 4: transport the mushroom residue, flocculant and primary biogas slurry into a mixing tank for thorough mixing;

[0011] Step 5: subjecting the mixture obtained in step 4 to solid-liquid separation again;

[0012] Step 6: transporting the biogas residue obtained in step 5 to an organic fertilizer or greening matrix workshop for processing into organic fertilizer or greening matrix materials;

[0013] Step 7: a portion of the secondary biogas slurry obtained in step 5 is sent to farmland for consumption as biogas slurry fertilizer, and the other portion is reused as dilution water for the anaerobic system in the anaerobic fermentation process of chicken manure in step 1.

[0014] Preferably, the particle size of the mushroom residue after crushing in step 2 is in the range of 1-1.5 mm.

[0015] Preferably, the flocculant in step 3 includes polyaluminum chloride and polyacrylamide.

[0016] Preferably, the concentration of the polyaluminium chloride is 5%, the concentration of the polyacrylamide is 1‰, the volume ratio of the primary biogas slurry to the flocculant is 100:8, and the mass ratio of the mushroom residue to the primary biogas slurry is 2%-4%.

[0017] The hopper is connected to the mixing tank via a channel, and the channel is connected to the mixing tank via a channel slot.

[0018] Preferably, the telescopic power assembly includes a mounting plate and a telescopic power device located on the mounting plate, the mounting plate is fixedly connected to the outer wall of the mixing box, the telescopic power device is fixedly connected to the mounting plate, and the horizontal telescopic rod of the telescopic power device is fixedly connected to the baffle.

[0019] Preferably, the filter screen is connected to the second lifting drive device via a hinge, the filter screen is contact-connected to the third lifting drive device, and the hem of the mushroom residue discharge port is connected to a belt conveyor.

[0020] Preferably, the height of the primary biogas slurry feed port is lower than the highest height of the filter screen.

[0021] Preferably, the bottom of the mixing and stirring box is connected to the secondary sludge discharge pipe through a buffer portion, the middle part of the buffer portion is adapted to the mounting port structure on the support frame, the cross-sectional dimension of the buffer portion gradually decreases from top to bottom, and the top surface dimension of the buffer portion is equal to the bottom surface dimension of the mixing and stirring box, and the bottom surface dimension of the buffer portion is equal to the cross-sectional dimension of the secondary sludge discharge pipe.

[0022] Therefore, the present invention adopts a method and separation device for the coordinated treatment of chicken manure biogas slurry and mushroom residue of the above structure, which has the following beneficial effects:

[0023] After anaerobic fermentation and solid-liquid separation of chicken manure, part of the suspended matter in the primary biogas slurry is adsorbed into the pores of the mushroom residue. The part that cannot be removed by adsorption is used to form flocculent precipitation using flocculants, and then separated by separation equipment, thereby achieving the effect of reducing the TS of the biogas slurry, avoiding the problem of seedling burning in subsequent farmland disposal, and solving the problem of solid matter in the biogas slurry clogging the dripping equipment. At the same time, the mushroom residue absorbs the suspended matter in the primary biogas slurry, increasing the organic matter content. When used to produce organic fertilizer or greening matrix materials, the amount of organic matter added can be saved, reducing costs.

[0024] The present invention provides a device for separating chicken manure biogas slurry and mushroom residue, which can realize rapid and full mixing of chicken manure biogas slurry and mushroom residue and efficient separation after mixing.

[0025] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of an embodiment of a device for separating chicken manure biogas slurry from mushroom residue according to the present invention;

[0027] Figure 2 This is a schematic structural diagram of an embodiment of a telescopic power assembly in the chicken manure biogas slurry and mushroom residue separation device of the present invention;

[0028] Figure 3 This is a structural schematic diagram of an embodiment of a lower pressure plate in the chicken manure biogas slurry and mushroom residue separation equipment of the present invention;

[0029] Figure 4 This is a structural schematic diagram of an embodiment of the present invention in which a filter screen is connected to a second lifting drive device in the chicken manure biogas slurry and mushroom residue separation equipment.

[0030] Attached photos

[0031] 1. Support frame; 2. Mixing and stirring box; 3. Buffer joint; 4. Secondary biogas slurry discharge pipe; 5. Primary biogas slurry feed port; 6. Mushroom residue feed port; 7. Flocculant feed port; 8. Mushroom residue discharge port; 9. Baffle; 10. Mounting plate; 11. Telescopic power device; 12. Lower pressure plate; 13. Net cover; 14. First lifting power device; 15. Filter screen; 16. Second lifting drive device; 17. Third lifting drive device; 18. Belt conveyor. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. Example

[0033] A method for co-processing chicken manure biogas slurry and mushroom residue comprises the following steps:

[0034] Step 1: The chicken manure is subjected to anaerobically fermented, and the mixture produced after fermentation is subjected to solid-liquid separation to obtain primary biogas slurry that may cause seedling burn problems.

[0035] Step 2: Crush the mushroom residue. The particle size of the mushroom residue after crushing is in the range of 1-1.5mm. This particle size range allows the mushroom residue to have a large enough surface area to absorb organic matter in the primary biogas slurry.

[0036] Step 3: Select the type of flocculant. In this step, polyaluminum chloride and polyacrylamide are selected as flocculants. The concentration of polyaluminum chloride is 5%, and the concentration of polyacrylamide is 1‰.

[0037] Step 4: transport the mushroom residue, flocculant and primary biogas slurry to the mixing tank 2 for thorough mixing, wherein the volume ratio of primary biogas slurry to flocculant is 100:8, and the mass ratio of mushroom residue to primary biogas slurry is 2%-4%.

[0038] Step 5: The mixture obtained in step 4 is subjected to solid-liquid separation again.

[0039] Step 6: The biogas residue obtained in step 5 is transported to an organic fertilizer or greening matrix workshop for processing into organic fertilizer or greening matrix materials.

[0040] Step 7: a portion of the secondary biogas slurry obtained in step 5 is sent to farmland for consumption as biogas slurry fertilizer, and the other portion is reused as dilution water for the anaerobic system in the anaerobic fermentation process of chicken manure in step 1.

[0041] The comparison table of secondary biogas slurry and primary biogas slurry obtained by the above method is as follows:

[0042] TS SS COD Ammonia nitrogen TP Primary biogas slurry 6.97% 2.82% 33260mg / L 3610mg / L 32.36mg / L Secondary biogas slurry 4.34% 0.19% 11580mg / L 3371mg / L 19.22mg / L

[0043] In the table, TS refers to the concentration of all solid components, SS refers to the concentration of solids suspended in water, COD refers to the organic matter content in the biogas slurry, and TP refers to the total phosphorus content in the biogas slurry. This demonstrates that this method effectively addresses the difficulty in farmland disposal of primary biogas slurry from chicken manure fermentation due to excessively high TS, effectively preventing seedling burn and the blockage of nozzles and pipes caused by suspended matter. Furthermore, the mushroom residue absorbs suspended matter from the primary biogas slurry, increasing its organic matter content. This reduces the amount of organic matter added when used in the production of organic fertilizer or landscaping substrate, thus reducing costs.

[0044] like Figure 1-4 As shown, a device for separating chicken manure slurry from mushroom residue can be used for steps 4 and 5 of the above method. It includes a support frame 1, on which a mixing and stirring box 2 is provided. The bottom of the mixing and stirring box 2 is connected to the secondary slurry discharge pipe 4 through a buffer portion 3. The buffer portion 3 facilitates the rapid and complete removal of the secondary slurry from the mixing and stirring box 2. The middle part of the buffer portion 3 is adapted to the mounting port structure on the support frame 1. The cross-sectional dimensions of the buffer portion 3 gradually decrease from top to bottom, and the top surface dimension of the buffer portion 3 is equal to the bottom surface dimension of the mixing and stirring box 2. The bottom surface dimension of the buffer portion 3 is equal to the cross-sectional dimension of the secondary slurry discharge pipe 4. A valve is provided in the buffer portion 3 or the secondary slurry discharge pipe 4.

[0045] The side walls of the mixing tank 2 are provided with a primary biogas feed port 5, a mushroom residue feed port 6, and a flocculant feed port 7. The two opposite sides of the mixing tank 2 are provided with a mushroom residue discharge port 8 and a baffle 9, respectively. The height of the baffle 9 is higher than the height of the mushroom residue discharge port 8. The baffle 9 is located in the side wall groove of the mixing tank 2 and is connected to the telescopic power assembly. The telescopic power assembly includes a mounting plate 10 and a telescopic power device 11 located on the mounting plate 10. The mounting plate 10 is fixedly connected to the outer wall of the mixing tank 2. The telescopic power device 11 is fixedly connected to the mounting plate 10. The horizontal telescopic rod of the telescopic power device 11 is fixedly connected to the baffle 9. The telescopic power assembly can drive the end of the baffle 9 to extend out of the side wall groove of the mixing tank 2 or retract into the side wall groove of the mixing tank 2.

[0046] A lower pressure plate 12 is installed at the top of the mixing and stirring chamber 2. This plate is equipped with evenly spaced through-holes, each containing a mesh 13 with an aperture smaller than the particle size of the crushed mushroom residue. The top surface of the lower pressure plate 12 is connected to a first lifting mechanism 14, which drives the lower pressure plate 12 up and down. During descent, the mushroom residue on the surface of the primary biogas slurry is pressed into the primary biogas slurry for thorough mixing. During the ascent and descent, the through-holes increase the turbulence of the primary biogas slurry, further enhancing the mixing of the primary biogas slurry and the mushroom residue.

[0047] A filter screen 15, adapted for the structure of the mixing and blending chamber 2, is provided at the bottom of the chamber. The mesh size of the filter screen 15 is smaller than the particle size of the crushed mushroom residue. One end of the bottom surface of the filter screen 15 is rotatably connected to a second lifting drive 16, which may be connected via a hinge. The other end of the bottom surface of the filter screen 15 is movably connected to a third lifting drive 17, which may be connected via a contact connection. The second and third lifting drives 16, 17 are capable of driving the filter screen 15 in a lifting motion. The second lifting drive 16 can elevate one end of the filter screen 15 to the highest position of the mushroom residue discharge port 8. The third lifting drive 17 can elevate the other end of the filter screen 15 to the baffle 9, where it collides with the baffle 9. This collision with the baffle 9 rapidly removes the mushroom residue from the filter screen 15 from the mixing and blending chamber 2. The outer edge of the mushroom residue discharge port 8 is connected to a belt conveyor 18, which transports the mushroom residue to the organic fertilizer or greening substrate workshop for processing. The height of the primary biogas liquid feed port 5 is lower than the highest height of the filter screen 15. When the filter screen 15 is lifted to dump the mushroom residue, the primary biogas liquid can enter the mixing tank 2 through the primary biogas liquid feed port 5, thereby improving production efficiency.

[0048] During use, primary biogas slurry, mushroom residue and flocculant in appropriate proportions are respectively put into the mixing and stirring box 2 through the primary biogas slurry feed port 5, the mushroom residue feed port 6 and the flocculant feed port 7, and then the first lifting device, the second lifting device and the third lifting device are started to make the lower pressing plate 12 and the filter screen 15 perform alternating lifting and lowering movements to increase the mixing speed and mixing degree between the primary biogas slurry, mushroom residue and flocculant. At this time, the rising height of the filter screen 15 is lower than the mushroom residue discharge port 8, and the filter screen 15 is always in a horizontal state. After alternating lifting and lowering several times, the valve in the slow connection part 3 or the secondary biogas slurry discharge pipe 4 is opened, and the biogas slurry is discharged through the secondary biogas slurry discharge pipe 4. The lower pressing plate 12 is raised and reset, and one end of the filter screen 15 is lifted to the mushroom residue discharge port 8 by the second lifting drive device 16 and maintains the same height. The other end of the filter screen 15 is repeatedly lifted to the baffle 9 by the push of the third lifting drive device 17 and collides with the baffle 9, thereby increasing the discharge efficiency of the mushroom residue.

[0049] Therefore, the present invention employs the aforementioned method for the coordinated disposal of chicken manure biogas slurry and mushroom residue, resolving the difficulty in disposing of the primary biogas slurry produced after anaerobic fermentation and primary solid-liquid separation of chicken manure. Furthermore, the mushroom residue absorbs suspended matter in the primary biogas slurry, increasing its organic matter content. This reduces the amount of organic matter added and reduces costs when used in the production of organic fertilizer or landscaping substrates. A chicken manure biogas slurry and mushroom residue separation device employing the aforementioned structure enables rapid and thorough mixing of the chicken manure biogas slurry and mushroom residue, as well as efficient separation after mixing.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for the coordinated disposal of chicken manure biogas slurry and mushroom residue, characterized by: The following steps are involved: Step 1: Anaerobic fermentation of chicken manure is performed, and the resulting mixture is subjected to solid-liquid separation to obtain primary biogas slurry that may cause seedling burn; Step 2: Crush the mushroom residue to a particle size range of 1-1.5 mm. Step 3: Select the type of flocculant, which includes polyaluminum chloride and polyacrylamide; Step 4: transporting the mushroom residue, flocculant and primary biogas slurry to a mixing and stirring tank (2) for thorough stirring; the concentration of the polyaluminium chloride is 5%, the concentration of the polyacrylamide is 1‰, the volume ratio of the primary biogas slurry to the flocculant is 100:8, and the mass ratio of the mushroom residue to the primary biogas slurry is 2%-4%; Step 5: subjecting the mixture obtained in step 4 to solid-liquid separation again; Step 6: transporting the biogas residue obtained in step 5 to an organic fertilizer or greening matrix workshop for processing into organic fertilizer or greening matrix materials; Step 7: a portion of the secondary biogas slurry obtained in step 5 is sent to farmland for consumption as biogas slurry fertilizer, and the other portion is reused as dilution water for the anaerobic system in the anaerobic fermentation process of chicken manure in step 1.

2. The chicken manure biogas slurry and mushroom residue separation device used in the chicken manure biogas slurry and mushroom residue coordinated disposal method according to claim 1 is characterized in that: The invention comprises a support frame (1), wherein the support frame (1) is provided with the mixing and stirring box (2), the side wall of the mixing and stirring box (2) is provided with a primary biogas liquid feed port (5), a mushroom residue feed port (6) and a flocculant feed port (7), and two opposite side surfaces of the mixing and stirring box (2) are respectively provided with a mushroom residue discharge port (8) and a baffle (9), the height of the baffle (9) is higher than the height of the mushroom residue discharge port (8), the baffle (9) is located in the side wall through groove of the mixing and stirring box (2) and is connected to the telescopic power component, and the top of the inner cavity of the mixing and stirring box (2) is provided with a lower pressure plate (12) The top surface of the lower pressure plate (12) is connected to the first lifting power device (14), the lower pressure plate (12) is provided with through holes evenly spaced apart, a mesh cover (13) is provided in the through holes, the bottom of the inner cavity of the mixing box (2) is provided with a filter screen (15) adapted to its structure, one end of the bottom surface of the filter screen (15) is rotatably connected to the second lifting drive device (16), and the other end of the bottom surface of the filter screen (15) is movably connected to the third lifting drive device (17), and the aperture of the mesh cover (13) and the aperture of the filter screen (15) are both smaller than the crushed particle size of the mushroom residue.

3. The chicken manure biogas slurry and mushroom residue separation equipment according to claim 2, characterized in that: The telescopic power assembly comprises a mounting plate (10) and a telescopic power device (11) located on the mounting plate (10); the mounting plate (10) is fixedly connected to the outer wall of the mixing box (2); the telescopic power device (11) is fixedly connected to the mounting plate (10); and a horizontal telescopic rod of the telescopic power device (11) is fixedly connected to the baffle (9).

4. The chicken manure biogas slurry and mushroom residue separation equipment according to claim 3, characterized in that: The filter screen (15) is connected to the second lifting drive device (16) via a hinge, the filter screen (15) is in contact connection with the third lifting drive device (17), and the hem of the mushroom residue discharge port (8) is connected to the belt conveyor (18).

5. The chicken manure biogas slurry and mushroom residue separation equipment according to claim 4, characterized in that: The height of the primary biogas slurry feed port (5) is lower than the highest height of the filter screen (15).

6. The chicken manure biogas slurry and mushroom residue separation equipment according to claim 5, characterized in that: The bottom of the mixing and stirring box (2) is connected to the secondary biogas slurry discharge pipe (4) through a buffer portion (3); the middle portion of the buffer portion (3) is adapted to the mounting opening structure on the support frame (1); the cross-sectional dimensions of the buffer portion (3) gradually decrease from top to bottom; the top surface dimension of the buffer portion (3) is equal to the bottom surface dimension of the mixing and stirring box (2); and the bottom surface dimension of the buffer portion (3) is equal to the cross-sectional dimension of the secondary biogas slurry discharge pipe (4).

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