Chicken manure biogas slurry and mushroom residue co-processing method and separation equipment

Abstract

The invention discloses a chicken manure biogas slurry and mushroom residue co-processing method and separation equipment, and relates to the technical field of organic fertilizer processing, and the chicken manure biogas slurry and mushroom residue co-processing method comprises the following steps: conveying mushroom residues, a flocculating agent and primary biogas slurry into a mixing and stirring box for full stirring; and then carrying out solid-liquid separation on the obtained mixture, conveying biogas residues obtained by solid-liquid separation to an organic fertilizer or greening matrix workshop for processing organic fertilizer or greening matrix materials, conveying one part of obtained secondary biogas slurry to a farmland to be consumed as biogas slurry fertilizer, and recycling the other part of obtained secondary biogas slurry as anaerobic system dilution water to a chicken manure anaerobic fermentation process. According to the chicken manure biogas slurry and mushroom residue co-processing method and separation equipment adopting the structure, the problem that primary biogas slurry generated after chicken manure is subjected to anaerobic fermentation and primary solid-liquid separation is difficult to digest in a farmland is solved, meanwhile, suspended solids in the primary biogas slurry are adsorbed by the mushroom residues, the content of organic matter is increased, and the organic matter content is increased. And the additive amount of organic matters can be saved and the cost can be reduced when the fertilizer is used for producing organic fertilizers or greening substrate materials.

Description

Technical Field

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

[0002] Since chicken manure is sticky and has a high organic matter content, it is difficult to separate the solid and liquid of the mixture produced after anaerobic fermentation. The total TS value of all solid components in the biogas slurry after solid-liquid separation is about 7%. Excessive TS leads to eutrophication problems and makes it difficult to dispose of the biogas slurry. Large-scale biogas slurry disposal is mostly done through surrounding farmland. High TS concentration of chicken manure biogas slurry often causes seedling burn. In addition, it is not applicable to the drip irrigation method advocated by modern agriculture, in which the certain viscous suspended matter will cause the problem of clogging the nozzle and pipeline.

[0003] The raw materials of mushroom bags are wood chips, straw, corn stalks, etc. After the mushroom bags are discarded during mushroom production, they become mushroom residues. Most of the mushroom residues have little organic matter content, and their nutrients are absorbed during the mushroom production process. Mushroom residues are a kind of agricultural organic waste. Its main characteristics are light weight, loose and porous. It can be used to make organic fertilizer or greening matrix materials, but sufficient organic matter needs to be supplemented during the production process. The process of organic matter supplementation increases the production cost of organic fertilizer or greening matrix materials.

[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 treatment of chicken manure biogas slurry and mushroom residue, so as to solve the problem that the primary biogas slurry generated after anaerobic fermentation and primary solid-liquid separation of chicken manure is difficult to be disposed of in farmland, and at the same time, reduce the cost of producing organic fertilizer or greening matrix material with mushroom residue.

[0006] To achieve the above object, the present invention provides a method for co-disposal of chicken manure biogas slurry and mushroom residue, comprising the following steps: Step 1: Perform anaerobic fermentation on the chicken manure, and perform solid-liquid separation on the mixture produced after fermentation to obtain primary biogas slurry that may cause seedling burn; Step 2: crushing the mushroom residue; Step 3: Select the type of flocculant; Step 4: transport the mushroom residue, flocculant and primary biogas slurry to a mixing tank for sufficient mixing; 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 of organic fertilizer or greening matrix materials; Step 7: Send part of the secondary biogas slurry obtained in step 5 to farmland for consumption as biogas slurry fertilizer, and reuse the other part as dilution water of the anaerobic system in the anaerobic fermentation process of chicken manure in step 1.

[0007] Preferably, the particle size of the mushroom residue after crushing in step 2 is in the range of 1-1.5 mm.

[0008] Preferably, the flocculant in step 3 includes polyaluminium chloride and polyacrylamide.

[0009] 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%.

[0010] A chicken manure biogas slurry and mushroom residue separation device, comprising a support frame, the support frame is provided with the mixing and stirring box, the side wall of the mixing and stirring box is provided with a primary biogas slurry feeding port, a mushroom residue feeding port and a flocculant feeding port, two opposite sides of the mixing and stirring box are respectively provided with a mushroom residue discharge port and a baffle, the height of the baffle is higher than the height of the mushroom residue discharge port, the baffle is located in the side wall through groove of the mixing and stirring box and is connected to a telescopic power component, a lower pressure plate is provided on the top of the inner cavity of the mixing and stirring box, the top surface of the lower pressure plate is connected to a first lifting power device, the lower pressure plate is provided with through holes evenly distributed at intervals, a mesh cover is provided in the through hole, a filter screen is provided at the bottom of the inner cavity of the mixing and stirring box, one end of the bottom surface of the filter screen is rotatably connected to a second lifting drive device, and the other end of the bottom surface of the filter screen is movably connected to a third lifting drive device, and the aperture of the mesh cover and the mesh aperture of the filter screen are both smaller than the crushing particle size of the mushroom residue.

[0011] 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.

[0012] 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.

[0013] Preferably, the height of the primary biogas slurry feed port is lower than the highest height of the filter screen.

[0014] Preferably, the bottom of the mixing and stirring box is connected to the secondary biogas slurry 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 biogas slurry discharge pipe.

[0015] Therefore, the present invention adopts a method and separation device for co-disposal of chicken manure biogas slurry and mushroom residues of the above structure, which has the following beneficial effects: A part of the suspended matter in the primary biogas slurry produced after anaerobic fermentation and primary solid-liquid separation of chicken manure 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 to achieve 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 for the production of organic fertilizer or greening matrix material, it can save the amount of organic matter added and reduce costs.

[0016] The invention provides a chicken manure biogas slurry and mushroom residue separation device, which can realize rapid and full mixing of the chicken manure biogas slurry and the mushroom residue and efficient separation after mixing.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a device for separating chicken manure biogas slurry from mushroom residues of the present invention; Figure 2 It is a structural schematic diagram of an embodiment of a telescopic power component in the chicken manure biogas slurry and mushroom residue separation device of the present invention; Figure 3 It is a structural schematic diagram of an embodiment of a lower pressing plate in a chicken manure biogas slurry and mushroom residue separation device of the present invention; Figure 4 It 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. Attached photos

[0019] 1. Support frame; 2. Mixing and stirring box; 3. Buffering part; 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

[0020] The technical solution of the present invention is further described below through the accompanying drawings and embodiments. Example

[0021] A method for co-disposal of chicken manure biogas slurry and mushroom residues comprises the following steps: Step 1: Perform anaerobically fermentation on the chicken manure, and separate the solid-liquid mixture produced after fermentation to obtain primary biogas slurry that will cause seedling burn problem.

[0022] Step 2: Crush the mushroom residue. The particle size of the mushroom residue after crushing is in the range of 1-1.5mm, which can give the mushroom residue a large enough surface area to absorb the organic matter in the primary biogas slurry.

[0023] Step 3: Select the type of flocculant. In this step, the flocculants are polyaluminum chloride and polyacrylamide. The concentration of polyaluminum chloride is 5% and the concentration of polyacrylamide is 1‰.

[0024] Step 4: convey the mushroom residue, flocculant and primary biogas slurry to the mixing and stirring tank 2 for sufficient stirring, wherein 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%.

[0025] Step 5: The mixture obtained in step 4 is subjected to solid-liquid separation again.

[0026] 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.

[0027] Step 7: Send part of the secondary biogas slurry obtained in step 5 to farmland for consumption as biogas slurry fertilizer, and reuse the other part as dilution water of the anaerobic system in the anaerobic fermentation process of chicken manure in step 1.

[0028] The comparison table of the secondary biogas slurry and the primary biogas slurry obtained by the above method is as follows: TS SS COD Ammonia nitrogen TP Primary biogas slurry 6.97% 2.82% 33260mg / L 3610mg / L 32.36mg / L Secondary slurry 4.34% 0.19% 11580mg / L 3371mg / L 19.22mg / L In the table, TS value refers to the concentration of all solid components, SS value refers to the concentration of solid matter suspended in water, COD refers to the content of organic matter in biogas slurry, and TP value refers to the content of total phosphorus in biogas slurry. It can be seen that this method can effectively solve the problem of farmland consumption difficulty caused by excessive TS of primary biogas slurry after chicken manure fermentation, and can effectively avoid the problem of seedling burning and the problem of suspended matter clogging nozzles and pipes. At the same time, the mushroom residue absorbs the suspended matter in the primary biogas slurry, increases the organic matter content, and can save the amount of organic matter added and reduce costs when used to produce organic fertilizer or greening matrix materials.

[0029] like Figure 1-4As shown, a device for separating chicken manure slurry from mushroom residue can be used in 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, and 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, and the cross-sectional size of the buffer portion 3 gradually decreases from top to bottom, and the top surface size of the buffer portion 3 is equal to the bottom surface size of the mixing and stirring box 2, and the bottom surface size of the buffer portion 3 is equal to the cross-sectional size of the secondary slurry discharge pipe 4. A valve is provided in the buffer portion 3 or the secondary slurry discharge pipe 4.

[0030] The side wall of the mixing and blending box 2 is provided with a primary biogas slurry feed port 5, a mushroom residue feed port 6 and a flocculant feed port 7, and the two opposite sides of the mixing and blending 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 groove of the mixing and blending box 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 side wall of the mixing and blending box 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 and blending box 2 or retract into the side wall groove of the mixing and blending box 2.

[0031] A lower pressing plate 12 is provided at the top of the inner cavity of the mixing and stirring box 2. The lower pressing plate 12 is provided with through holes evenly spaced apart. A mesh cover 13 is provided in the through holes. The aperture of the mesh cover 13 is smaller than the crushed particle size of the mushroom residue. The top surface of the lower pressing plate 12 is connected to a first lifting power device 14. The first lifting device can drive the lower pressing plate 12 to perform lifting and lowering movements. During the descent process, the mushroom residue on the surface of the primary biogas slurry can be pressed into the primary biogas slurry for full mixing. During the ascent and descent process, the through holes can increase the turbulence of the primary biogas slurry, further increasing the mixing degree of the primary biogas slurry and the mushroom residue.

[0032] The bottom of the inner cavity of the mixing and stirring box 2 is provided with a filter screen 15 adapted to its structure, and the mesh aperture of the filter screen 15 is smaller than the crushing particle size of the mushroom residue. One end of the bottom surface of the filter screen 15 is rotatably connected to the second lifting drive device 16, which can be specifically connected by a hinge. The other end of the bottom surface of the filter screen 15 is movably connected to the third lifting drive device 17, which can be specifically contact-connected. The second lifting drive device 16 and the third lifting drive device 17 can drive the filter screen 15 to perform lifting and lowering movements. The second lifting drive device 16 can lift one end of the filter screen 15 to the highest position of the mushroom residue discharge port 8, and the third lifting drive device 17 can push the other end of the filter screen 15 to the baffle 9 and collide with the baffle 9, so that the mushroom residue on the filter screen 15 is quickly moved out of the mixing and stirring box 2 through the collision with the baffle 9. The outer edge of the mushroom residue discharge port 8 is connected to the belt conveyor 18, and the belt conveyor 18 can transfer the mushroom residue to the organic fertilizer or greening matrix workshop for processing the organic fertilizer or greening matrix material. The height of the primary biogas slurry 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 slurry can enter the mixing and stirring box 2 through the primary biogas slurry feed port 5, thereby improving production efficiency.

[0033] When in 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 feeding port 5, the mushroom residue feeding port 6 and the flocculant feeding 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, the mushroom residue and the 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 rises and resets, and one end of the filter screen 15 is lifted to the mushroom residue discharge port 8 under the drive of the second lifting drive device 16 and keeps the height unchanged, and the other end of the filter screen 15 is repeatedly lifted to the baffle 9 under the drive of the third lifting drive device 17 and collides with the baffle 9, thereby increasing the discharge efficiency of the mushroom residue.

[0034] Therefore, the present invention adopts the above-mentioned method for co-disposal of chicken manure biogas slurry and mushroom residue, which solves the problem of difficulty in disposing the primary biogas slurry produced after anaerobic fermentation and primary solid-liquid separation of chicken manure. At the same time, the mushroom residue absorbs the suspended matter in the primary biogas slurry, increases the organic matter content, and can save the amount of organic matter added when used to produce organic fertilizer or greening matrix materials, thereby reducing costs. The chicken manure biogas slurry and mushroom residue separation equipment adopting the above-mentioned structure can achieve rapid and full mixing between chicken manure biogas slurry and mushroom residue, and efficient separation after mixing.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. 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 solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for the coordinated treatment of chicken manure biogas slurry and mushroom residue, characterized in that: The following steps are involved: Step 1: Perform anaerobic fermentation on the chicken manure, and perform solid-liquid separation on the mixture produced after fermentation to obtain primary biogas slurry that may cause seedling burn; Step 2: crushing the mushroom residue; Step 3: Select the type of flocculant; Step 4: transporting the mushroom residue, flocculant and primary biogas slurry to a mixing and stirring tank (2) for thorough stirring; 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 of organic fertilizer or greening matrix materials; Step 7: Send part of the secondary biogas slurry obtained in step 5 to farmland for consumption as biogas slurry fertilizer, and reuse the other part as dilution water of the anaerobic system in the anaerobic fermentation process of chicken manure in step 1.

2. The method for co-disposal of chicken manure biogas slurry and mushroom residue according to claim 1, characterized in that: In step 2, the particle size of the mushroom residue after crushing is in the range of 1-1.5 mm.

3. The method for co-disposal of chicken manure biogas slurry and mushroom residue according to claim 2, characterized in that: The flocculant in step 3 includes polyaluminium chloride and polyacrylamide.

4. The method for co-disposal of chicken manure biogas slurry and mushroom residue according to claim 3, characterized in that: 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%.

5. The chicken manure biogas slurry and mushroom residue separation device used in the chicken manure biogas slurry and mushroom residue coordinated treatment method according to any one of claims 1 to 4, 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 slurry 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), wherein the height of the baffle (9) is higher than the height of the mushroom residue discharge port (8), the baffle (9) is located in a through groove of the side wall of the mixing and stirring box (2) and is connected to a telescopic power component, and a lower pressure plate (12) is provided at the top of the inner cavity of the mixing and stirring box (2). 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, a filter screen (15) adapted to its structure is provided at the bottom of the inner cavity of the mixing and stirring box (2), 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.

6. The chicken manure biogas slurry and mushroom residue separation equipment according to claim 5, 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).

7. The chicken manure biogas slurry and mushroom residue separation equipment according to claim 6, characterized in that: The filter screen (15) is connected to the second lifting drive device (16) via a hinge, the filter screen (15) is contact-connected to the third lifting drive device (17), and the heel of the mushroom residue discharge port (8) is connected to a belt conveyor (18).

8. The chicken manure biogas slurry and mushroom residue separation equipment according to claim 7, characterized in that: The height of the primary biogas slurry feed port (5) is lower than the highest height of the filter screen (15).

9. The chicken manure biogas slurry and mushroom residue separation equipment according to claim 8, characterized in that: The bottom of the mixing and stirring box (2) is connected to the secondary biogas slurry discharge pipe (4) via 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 dimensions of the buffer portion (3) are equal to the bottom surface dimensions of the mixing and stirring box (2); and the bottom surface dimensions of the buffer portion (3) are equal to the cross-sectional dimensions of the secondary biogas slurry discharge pipe (4).

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