CN113620735A - Preparation system and method of granular composite microbial fertilizer - Google Patents
Preparation system and method of granular composite microbial fertilizer Download PDFInfo
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- CN113620735A CN113620735A CN202110907012.2A CN202110907012A CN113620735A CN 113620735 A CN113620735 A CN 113620735A CN 202110907012 A CN202110907012 A CN 202110907012A CN 113620735 A CN113620735 A CN 113620735A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 25
- 238000012216 screening Methods 0.000 claims abstract description 102
- 238000000855 fermentation Methods 0.000 claims abstract description 88
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- 239000000463 material Substances 0.000 claims abstract description 79
- 238000005469 granulation Methods 0.000 claims abstract description 43
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- 238000001035 drying Methods 0.000 claims abstract description 29
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- 238000004806 packaging method and process Methods 0.000 claims abstract description 15
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/957—Apparatus therefor using two or more serially arranged devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/286—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens with excentric shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
- C05D9/02—Other inorganic fertilisers containing trace elements
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/50—Treatments combining two or more different biological or biochemical treatments, e.g. anaerobic and aerobic treatment or vermicomposting and aerobic treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/80—Separation, elimination or disposal of harmful substances during the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Plant Pathology (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a preparation system of a granular composite microbial fertilizer, which comprises a material mixing device, wherein the material mixing device is connected with a sealable high-temperature high-pressure fermentation device through a first transportation component, the high-temperature high-pressure fermentation device is connected with an aging device through a second transportation component, the aging device is connected with a crushing and screening device through a third transportation component, the crushing and screening device is connected with an auxiliary material mixing device through a fourth transportation component, the auxiliary material mixing device is connected with a circulating granulation and polishing integrated device through a fifth transportation component, the granulation and polishing integrated device is connected with a drying device through a sixth transportation component, the output end of the drying device is connected with a finished product packaging device, the output end of a batching device is matched with the fourth transportation component, and the high-temperature high-pressure fermentation device is connected with a steam device for providing high temperature and high pressure for the high-temperature high-pressure fermentation device. The invention has the advantages of high speed of producing the granulated fertilizer, uniform granulated fertilizer, small occupied space and energy conservation.
Description
Technical Field
The invention relates to the technical field of microbial fertilizer production, in particular to a preparation system and method of a granular composite microbial fertilizer.
Background
The compound microbial fertilizer organically combines inorganic nutrient elements, organic matters and microbial bacteria into a whole, embodies the comprehensive effect of inorganic chemical fertilizer, organic fertilizer and microbial fertilizer, and is an effective way for decomposing soil hardening phenomenon, repairing and conditioning soil, improving the utilization rate of chemical fertilizer, reducing river pollution, reducing pest and disease damage, enhancing the stress resistance of crops and improving the fruit quality and yield of crops. With the development of agriculture, more and more users use granular fertilizers. However, the existing production technology of the granular composite microbial fertilizer is lagged behind, the process is complex, the production period is long, and the technical indexes of the produced microbial fertilizer such as effective viable count, moisture and the like do not meet the industrial requirements. Meanwhile, the produced granular fertilizer is not uniform, and the fertilizer is not convenient for a user to fertilize. The number of devices used in the production process is large, so that a large amount of production space is occupied, and more resources are wasted.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation system and a preparation method of a granular composite microbial fertilizer.
The purpose of the invention is realized by the following technical scheme:
a preparation system of a granular composite microbial fertilizer comprises a material mixing device, a high-temperature high-pressure fermentation device, a crushing and screening device, a batching device, an auxiliary material mixing device, a granulation and polishing integrated device, a drying device and a finished product packaging device, wherein the material mixing device is connected with the sealable high-temperature high-pressure fermentation device through a first transportation component, the high-temperature high-pressure fermentation device is connected with an aging device through a second transportation component, the aging device is connected with the crushing and screening device through a third transportation component, the crushing and screening device is connected with the auxiliary material mixing device through a fourth transportation component, the auxiliary material mixing device is connected with the circulating granulation and polishing integrated device through a fifth transportation component, the granulation and polishing integrated device is connected with the drying device through a sixth transportation component, and the output end of the drying device is connected with the finished product packaging device, the output end of the batching device is matched with the fourth transportation component, and the high-temperature high-pressure fermentation device is connected with a steam device which is used for providing high-temperature high-pressure steam for the high-temperature high-pressure fermentation device.
Further, integrative device of granulation throwing circle includes support, feeder hopper, granulation subassembly, throwing circle subassembly, screening subassembly and circulation transportation subassembly, the feeder hopper sets up the support top and with the output cooperation of fifth transportation subassembly, granulation subassembly sealing connection be in the downside of feeder hopper, the input of throwing circle subassembly with the output sealing connection of granulation subassembly, the output and the slope of throwing circle subassembly set up screening subassembly's input sealing connection, screening subassembly's output with the cooperation of sixth transportation subassembly, screening subassembly's downside is provided with the powder and collects the storehouse, the powder is collected the storehouse and is fixed to be set up on the support and with the input of circulation transportation subassembly links to each other, the output of circulation transportation subassembly with the feeder hopper links to each other.
Further, the circle throwing component comprises a first-stage circle throwing part, a second-stage circle throwing part, a first-stage rotating shaft, a second-stage rotating shaft, a driving motor and a transmission part, the first-stage rotating shaft and the first-stage circle throwing part are coaxially arranged, the second-stage circle throwing part and the second-stage rotating shaft are coaxially arranged, the driving motor is fixedly arranged on the bracket, the driving motor drives the first-stage rotating shaft and the second-stage rotating shaft to rotate through the transmission part, the lower ends of the first-stage rotating shaft and the second-stage rotating shaft are matched with the screening component and are used for driving the screening component to vibrate, a feeding hole is formed in the first-stage circle throwing part, the feeding hole is in sealing connection with the granulation component through a bent pipe, the first-stage circle throwing part is in contact with the second-stage circle throwing part and is communicated through a transition hole, and a discharge hole is formed in the second-stage circle throwing part, the discharge opening is matched with the screening component.
Further, the transmission part comprises a rotating rod, a dustproof shell, a first bevel gear and a second bevel gear, the rotating rod is connected with an output shaft of the driving motor, the rotating rod is provided with two first bevel gears, the upper end of the one-level rotating shaft is provided with one second bevel gear matched with the first bevel gear, the upper end of the two-level rotating shaft is provided with another second bevel gear matched with the first bevel gear, the first bevel gear and the second bevel gear are both arranged inside the dustproof shell, and the dustproof shell is fixedly arranged on the support.
Further, the screening component comprises sliding rods, a reset spring, a screening box body and an eccentric wheel, at least two sliding rods are horizontally arranged on the support, the sliding rods are parallel to each other, the screening box body is arranged on the sliding rods and can slide in a reciprocating mode along the length direction of the sliding rods, the screening box body is inclined to be arranged, the cross section of the screening box body is square, the upper end of the screening box body is matched with the discharge hole, the lower end of the screening box body is matched with the sixth transportation component, the reset spring is sleeved at the two ends of each sliding rod, one end of each reset spring is connected with the end portion of each sliding rod, the other end of each reset spring is in contact with the side wall of the screening box body, two strip holes are formed in the top of the screening box body and are arranged along the length direction of the screening box body, and the width of each strip hole is matched with the diameter of the eccentric wheel, the one-level axis of rotation with the lower extreme of second grade axis of rotation all is provided with the eccentric wheel, the powder hole that runs through is densely equipped with on the downside of screening box.
Further, the circulation transportation subassembly includes cross feed auger part, vertical transport auger part and charge-in pipeline, cross feed auger part sets up the bottom in storehouse is collected to the powder, the output of cross feed auger part with the lower extreme cooperation of vertical transport auger part, the upper end of vertical transport auger part is passed through charge-in pipeline with the feeder hopper links to each other, the charge-in pipeline slope sets up and makes things convenient for powder fertilizer to enter into in the feeder hopper.
Furthermore, the screening box body is connected with a discharge hole formed in the second-stage rounding part in a sealing mode through a flexible pipeline.
Furthermore, a loose and sealed material blocking layer is arranged between the lower surface of the screening box body and the opening at the upper end of the powder collecting bin.
Further, a stabilizing bin is fixedly arranged on the support, the upper end of the stabilizing bin is matched with the output end of the screening box body, a blanking port is formed in the lower end of the stabilizing bin, and the blanking port is matched with the sixth transportation assembly.
A method for preparing a granular composite microbial fertilizer, comprising the steps of:
s1: putting the accumulated poultry excrement, the straw powder and the leftovers in the slaughterhouse in a material mixing device according to a certain proportion for mixing raw materials, wherein the moisture of the raw materials is 40-50%;
s2: conveying the mixed raw materials to the high-temperature high-pressure fermentation device through the first conveying assembly, wherein the high-temperature high-pressure fermentation device is used for stirring simultaneously in the feeding process;
s3: the volume of the raw materials in the high-temperature high-pressure fermentation device is not more than 85 percent of the volume of the high-temperature high-pressure fermentation device, after the feeding is finished, a feeding valve arranged at the top of the high-temperature high-pressure fermentation device is closed, then introducing steam into the high-temperature high-pressure fermentation device through the steam device for fermentation, controlling the temperature inside the high-temperature high-pressure fermentation device to be between 90 and 120 ℃ and the pressure inside the high-temperature high-pressure fermentation device to be between 0.75 and 0.8MPa, keeping the temperature and the pressure until the raw materials reach the maturity degree in the high-temperature high-pressure fermentation device, then closing a valve between the steam device and the high-temperature high-pressure fermentation device, then opening an exhaust valve on the high-temperature high-pressure fermentation device, and opening a discharge valve at the bottom of the high-temperature high-pressure fermentation device when the temperature in the high-temperature high-pressure fermentation device is reduced to below 50 ℃;
s4: the material discharged from the discharge valve is conveyed into an ageing device through the second conveying assembly, the material is aged for 10-15 days in the ageing device, and the material is turned and thrown once by a turner every 3-4 days in the ageing process;
s5: conveying the aged material to a crushing and screening device through the third conveying assembly for crushing and screening, conveying the material to the auxiliary material mixing device through the fourth conveying assembly for mixing, and adding ingredients into the material through the ingredient device in the conveying process, wherein the ingredients comprise a certain proportion of a microbial functional agent and a certain proportion of trace elements;
s6: conveying the materials added with ingredients into the granulation and rounding integrated device through the fifth conveying assembly for granulation, rounding and screening, conveying the screened granulated fertilizer onto the sixth conveying assembly, and conveying the screened powdered fertilizer into a feed hopper through the circulating conveying assembly for granulation again;
s7: conveying the granulated fertilizer on the sixth conveying assembly into a drying device for drying operation, controlling the temperature of a feed inlet of the drying device to be 70-80 ℃, controlling the temperature of a discharge outlet of the drying device to be below 30 ℃, and meanwhile, drying to form the fertilizer, wherein the moisture in the fertilizer is controlled to be below 20%;
s8: and conveying the dried fertilizer to the finished product packaging device, coating the fertilizer, and packaging the finished product.
The invention has the beneficial effects that:
1) the invention has unique process, and the fermentation is carried out in the high-temperature high-pressure fermentation device, so that the raw materials are thoroughly decomposed, the weed seeds are thoroughly killed, pathogenic bacteria are thoroughly eliminated, and the fermentation time is greatly reduced; by adding the microbial agent and the trace elements, the defect of single component of the compound microbial fertilizer is overcome; the traditional process is high-temperature drying and dehydration, which is not beneficial to the survival of microorganism bacteria, while the low-temperature drying of the invention is not only beneficial to the survival of microorganism bacteria, but also reduces the cost; the granular fertilizer produced by the invention is uniform, and is greatly convenient for a user to fertilize.
2) In the invention, the original production processes comprise three processes of granulating, rounding and screening, and the three processes are independently completed by three different devices, so that a conveyor belt is additionally arranged between the connected devices, the occupied space is large, more energy is consumed, and the granulating and rounding integrated device can simultaneously realize granulating, rounding and screening, so that the occupied space is small, and the energy can be saved.
3) In the invention, the circle throwing component and the screening component are driven to work simultaneously by one driving motor, so that the energy is greatly saved, and the granulation and circle throwing integrated device is more compact.
Drawings
FIG. 1 is a schematic view of a connection structure of the present production system;
FIG. 2 is a schematic view of the granulation and rounding integrated apparatus;
FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 2;
FIG. 4 is a process flow diagram of the present invention;
in the figure, 1-a material mixing device, 2-a high-temperature high-pressure fermentation device, 3-a crushing and screening device, 4-a batching device, 5-an auxiliary material mixing device, 6-a granulation and polishing integrated device, 7-a drying device, 8-a finished product packaging device, 9-an aging device, 10-a steam device, 11-a bracket, 12-a feed hopper, 13-a granulation assembly, 14-a powder collecting bin, 15-a first-stage polishing part, 16-a second-stage polishing part, 17-a first-stage rotating shaft, 18-a second-stage rotating shaft, 19-a driving motor, 20-a bent pipe, 21-a transition hole, 22-a rotating rod, 23-a dustproof shell, 24-a first bevel gear, 25-a second bevel gear, 26-a sliding rod and 27-a reset spring, 28-screening box body, 29-eccentric wheel, 30-elongated hole, 31-transverse conveying auger component, 32-vertical conveying auger component, 33-feeding pipeline, 34-material blocking layer and 35-stabilizing bin.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution:
a preparation system of a granular composite microbial fertilizer comprises a material mixing device 1, a high-temperature high-pressure fermentation device 2, a crushing and screening device 3, a batching device 4, an auxiliary material mixing device 5, a granulation and polishing integrated device 6, a drying device 7 and a finished product packaging device 8, wherein the material mixing device 1 is connected with the sealable high-temperature high-pressure fermentation device 2 through a first transportation component, the high-temperature high-pressure fermentation device 2 is connected with an aging device 9 through a second transportation component, the aging device 9 is connected with the crushing and screening device 3 through a third transportation component, the crushing and screening device 3 is connected with the auxiliary material mixing device 5 through a fourth transportation component, the auxiliary material mixing device 5 is connected with a circulating granulation and polishing integrated device 6 through a fifth transportation component, the granulation and polishing integrated device 6 is connected with the drying device 7 through a sixth transportation component, and the output end of the drying device 7 is connected with the finished product packaging device 8, the output end of the batching device 4 is matched with the fourth transportation component, and the high-temperature high-pressure fermentation device 2 is connected with a steam device 10 which is used for providing high-temperature high-pressure steam for the high-temperature high-pressure fermentation device 2. Wherein, first transportation subassembly, second transportation subassembly, third transportation subassembly, fourth transportation subassembly, fifth transportation subassembly and sixth transportation subassembly are prior art's belt conveyor, and temperature and high pressure fermenting installation 2 is the fermentation cylinder that can seal. The material mixing device 1 comprises a plurality of raw material components, the materials are placed in a first transportation component by the raw material components, and the raw materials are transported to a fermentation tank by the first transportation component to be stirred. The feeding valve of the fermentation tank is arranged at the top of the fermentation tank, and the discharging valve is arranged at the bottom of the fermentation tank. The steam device 10 is connected with the lower end of the fermentation tank through a pipeline, and the exhaust valve is arranged at the upper end of the fermentation tank. Smash screening plant 3 and be in order to smash raw and other materials into the powder, make things convenient for the later stage to produce granular fertilizer, smash the fourth transportation subassembly between screening plant 3 and auxiliary material mixing arrangement 5 and pass from dosing unit 4's bottom, and dosing unit 4's batching is directly put on fourth transportation subassembly. The batching device 4 adds the microbial functional bacteria and trace elements into the crushed and sieved materials. The auxiliary material mixing device 5 is used for fully mixing the microbial functional inoculum and the trace elements with the materials. The steam device 10 provides high-temperature and high-pressure steam for the fermentation tank, so that the materials are quickly decomposed and quickly fermented, the production time is shortened, and the production efficiency is improved.
Granulation and circle-throwing integrated device 6 comprises a support 11, a feed hopper 12, granulation subassembly 13, the circle-throwing subassembly, screening subassembly and circulation transportation subassembly, feed hopper 12 sets up at support 11 top and cooperates with the output of fifth transportation subassembly, granulation subassembly 13 sealing connection is at the downside of feed hopper 12, the input of circle-throwing subassembly and granulation subassembly 13's output sealing connection, the output of circle-throwing subassembly and the input sealing connection of the screening subassembly that the slope set up, screening subassembly's output and the cooperation of sixth transportation subassembly, screening subassembly's downside is provided with powder and collects storehouse 14, powder is collected storehouse 14 and is fixed to be set up on support 11 and continuous with circulation transportation subassembly's input, circulation transportation subassembly's output links to each other with feed hopper 12. Wherein, the feed hopper 12, the granulation component 13, the rounding component and the screening component are all fixedly connected on the bracket 11. The material firstly enters into feed hopper 12 through the fifth transportation subassembly, and the material in feed hopper 12 firstly enters into granulation subassembly 13 of prior art and carries out the granulation, enters into the throwing circle subassembly through return bend 20 after the granulation and carries out the throwing circle operation, enters into the screening subassembly after the throwing circle is accomplished and sieves, and the powder fertilizer after the screening enters into powder collection storehouse 14 through the powder hole on screening box 28, and the granule fertilizer rolls on screening box 28 and enters into the sixth transportation subassembly. The powdered fertilizer in the powder collection bin 14 is returned to the feed hopper 12 by the circulating conveyor assembly for the next granulation. In the granulating and rounding integrated device 6, the granulator, the rounding machine, the screening machine, the circulating conveying assembly and the like are arranged into a whole, so that the occupation of a field can be reduced, the number of belt conveyors is reduced, and the purposes of saving energy and cost are also achieved. Granulation subassembly 13 extrusion formula granulator in this patent.
Preferably, the circle polishing component comprises a first-stage circle polishing part 15, a second-stage circle polishing part 16, a first-stage rotating shaft 17, a second-stage rotating shaft 18, a driving motor 19 and a transmission part, wherein the first-stage rotating shaft 17 and the first-stage circle polishing part 15 are coaxially arranged, the second-stage circle polishing part 16 and the second-stage rotating shaft 18 are coaxially arranged, the driving motor 19 is fixedly arranged on the bracket 11, and driving motor 19 drives one-level axis of rotation 17 and second grade axis of rotation 18 simultaneously through transmission part and rotates, the lower extreme of one-level axis of rotation 17 and second grade axis of rotation 18 all with the screening subassembly cooperation and be used for driving the screening subassembly vibrations, be provided with the feed inlet on the one-level rounding part 15, through return bend 20 sealing connection between feed inlet and the granulation subassembly 13, one-level rounding part 15 just communicates through transition hole 21 with the contact of second grade rounding part 16, be provided with the bin outlet on the second grade rounding part 16, the bin outlet cooperates with the screening subassembly. Wherein, adopt one-level throwing circle part 15 and second grade throwing circle part 16 can make throwing circle subassembly's throwing circle effect better. One-level rounding part 15 and second grade rounding part 16 all include the shell body, set up at the inside rounding pole of shell body, and the rounding pole is by being driven by respective one-level axis of rotation 17 and second grade axis of rotation 18, all is provided with the switch door on transition hole 21 and bin outlet, can be sealed the export of one-level rounding part 15 and second grade rounding part 16. The first-stage rounding part 15 is provided with a feeding hole, the first-stage rounding part 15 is in contact with the second-stage rounding part 16, and a discharge hole is formed in the transition hole 21 and the second-stage rounding part 16 and is positioned on the same vertical plane. The transition hole 21 is flush with the bottom of the first-stage rounding part 15, and the discharge outlet is flush with the bottom of the second-stage rounding part 16, so that the first-stage rounding part 15 and the second-stage rounding part 16 can discharge fertilizer conveniently.
Preferably, the transmission part includes a rotating rod 22, a dustproof housing 23, first bevel gears 24 and a second bevel gear 25, the rotating rod 22 is connected to an output shaft of the driving motor 19, two first bevel gears 24 are arranged on the rotating rod 22, a second bevel gear 25 matched with one first bevel gear 24 is arranged at the upper end of the first-stage rotating shaft 17, a second bevel gear 25 matched with the other first bevel gear 24 is arranged at the upper end of the second-stage rotating shaft 18, the first bevel gear 24 and the second bevel gear 25 are both arranged inside the dustproof housing 23, and the dustproof housing 23 is fixedly arranged on the support 11. Wherein, driving motor 19 drives dwang 22 and rotates, and dwang 22 drives two first bevel gear 24 and rotates, and two first bevel gear 24 drive one-level axis of rotation 17 and second grade axis of rotation 18 synchronous rotation through two second bevel gear 25 respectively, and one-level axis of rotation 17 and second grade axis of rotation 18 synchronous rotation can drive screening box 28 and do reciprocating motion. The transmission part can also adopt a worm gear and worm form, two identical worm gears are arranged on the first-stage rotating shaft 17 and the second-stage rotating shaft 18, and the rotating rod 22 is a worm. The output shaft of the driving motor 19 can be directly connected with the rotating rod 22, or can be connected with the rotating rod through other transmission, as long as the synchronous rotation of the first-stage rotating shaft 17 and the second-stage rotating shaft 18 is ensured.
Preferably, the screening assembly comprises sliding rods 26, a return spring 27, a screening box 28 and an eccentric wheel 29, at least two sliding rods 26 are horizontally arranged on the bracket 11, the sliding rods 26 are parallel to each other, the screening box 28 is arranged on the sliding rods 26 and can slide back and forth along the length direction of the sliding rods 26, the screening box 28 is obliquely arranged and has a square cross section, the upper end of the screening box 28 is matched with the discharge port, the lower end of the screening box 28 is matched with a sixth transportation assembly, the two ends of the sliding rods 26 are both sleeved with the return spring 27, one end of the return spring 27 is connected with the end of the sliding rod 26, the other end of the return spring 27 is in contact with the side wall of the screening box 28, the top of the screening box 28 is provided with two elongated holes 30, the elongated holes 30 are arranged along the length direction of the screening box 28, the width of the elongated holes 30 is matched with the diameter of the eccentric wheel 29, the lower ends of the primary rotating shaft 17 and the secondary rotating shaft 18 are both provided with the eccentric wheel 29, the lower side surface of the screening box 28 is closely provided with through powder holes. Wherein, slide bar 26 mainly is with bearing the weight of screening box 28 and making screening box 28 slide on slide bar 26, sets up reset spring 27 and prevents that screening box 28 from colliding with the support 11 on both sides, and screening box 28 slope sets up and makes granular fertilizer can roll on the lower surface of screening box 28, and the powder hole only can make the powder fertilizer leak down and enter into in powder collection storehouse 14, and granular fertilizer can not leak down from the powder hole. The elongated holes 30 are provided so as not to interfere with the eccentric 29 during movement with the screen box 28, and the screen box 28 can only move along the length of the slide bar 26.
Preferably, the circulating transportation assembly comprises a transverse transportation auger part 31, a vertical transportation auger part 32 and a feeding pipeline 33, the transverse transportation auger part 31 is arranged at the bottom of the powder collection bin 14, the output end of the transverse transportation auger part 31 is matched with the lower end of the vertical transportation auger part 32, the upper end of the vertical transportation auger part 32 is connected with the feeding hopper 12 through the feeding pipeline 33, and the feeding pipeline 33 is obliquely arranged to facilitate the powder fertilizer to enter the feeding hopper 12. The powder collecting bin 14 is conveyed out by the transverse conveying auger part 31 and then enters the vertical conveying auger part 32, and the vertical conveying auger part 32 is lifted upwards and then enters the feed hopper 12 by the feed pipe 33. The lower end of the vertical conveying auger part 32 is lower than the transverse conveying auger part 31. Horizontal transport auger part 31 and vertical transport auger part 32 are prior art, and the circulation transportation subassembly is sealed circulation subassembly, prevents that powdered fertilizer from revealing.
Preferably, the screening box 28 is connected with the discharge port arranged on the secondary rounding part 16 in a sealing way through a flexible pipeline. Since the screen box 28 always reciprocates along the slide bar 26, the screen box 28 is in soft connection with the discharge port of the secondary rounded member 16, such as a rubber pipe connection.
Preferably, a loose and sealed dam 34 is provided between the lower surface of the screen box 28 and the opening at the upper end of the powder collection bin 14. Since the sieving box 28 is moving and the powder collecting bin 14 does not move, in order to prevent the powder fertilizer leaking from the powder holes from scattering outside the powder collecting bin 14, a material blocking layer 34 is arranged to block the powder fertilizer, and the material blocking layer 34 is made of cloth.
Preferably, the bracket 11 is fixedly provided with a stabilizing bin 35, the upper end of the stabilizing bin 35 is matched with the output end of the screening box body 28, the lower end of the stabilizing bin 35 is provided with a blanking port, and the blanking port is matched with the sixth transportation assembly. Because screening box 28 is in reciprocating motion state in the course of the work, so when reaching the sixth transportation subassembly on the easy spill in the outside of sixth transportation subassembly, and stabilize storehouse 35 and can not move, the lower extreme is hourglass hopper-shaped, can prevent like this that granular fertilizer from spilling in the outside of sixth transportation subassembly. The lower end of the screen box 28 extends into the interior of the stabilisation bin 35.
A preparation method of a granular composite microbial fertilizer comprises the following steps:
(1) the method comprises the following steps of putting the poultry excrement, the straw powder and the leftovers in the slaughterhouse in a material mixing device 1 according to a certain proportion, and mixing the raw materials, wherein the moisture of the raw materials is 40-50%. Wherein, hold birds excrement 50%, straw powder 40% and slaughterhouse leftover bits 10%, slaughterhouse leftover bits are prior art, and the material is evenly mixed in material mixing arrangement 1, and the moisture after the mixture is between 40 ~ 50%.
(2) The mixed raw materials are conveyed to the high-temperature high-pressure fermentation device 2 through the first conveying assembly, and the high-temperature high-pressure fermentation device 2 is stirred simultaneously in the feeding process. The first transportation component that the process of fermenting installation 2 was adopted is band conveyer to the raw materials, installs magnetism on band conveyer and inhales the device (select the metal in the material).
(3) The volume of the raw materials in the high-temperature high-pressure fermentation device 2 is not more than 85% of the volume of the high-temperature high-pressure fermentation device 2, after feeding is completed, a feeding valve arranged at the top of the high-temperature high-pressure fermentation device 2 is closed, then steam is introduced into the high-temperature high-pressure fermentation device 2 through a steam device 10 for fermentation, the temperature inside the high-temperature high-pressure fermentation device 2 is controlled to be 90-120 ℃, the pressure inside the high-temperature high-pressure fermentation device 2 is 0.75-0.8 MPa, the temperature and the pressure are kept until the raw materials reach the decomposition degree in the high-temperature high-pressure fermentation device 2, then a valve between the steam device 10 and the high-temperature high-pressure fermentation device 2 is closed, then an exhaust valve on the high-temperature high-pressure fermentation device 2 is opened, and when the temperature inside the high-temperature high-pressure fermentation device 2 is reduced to be below 50 ℃, a discharge valve at the bottom of the high-temperature high-pressure fermentation device 2 is opened. The fermentation device 2 is a fermentation tank, and a stirring assembly in the fermentation tank is started before the materials enter the fermentation tank; the capacity of the materials in the fermentation tank is not more than 85% (the patent adopts a 40 cubic meter fermentation tank, and the maximum bearing capacity of the fermentation materials in the fermentation tank is 34 cubic meters); the maximum pressure of the fermentation tank is 0.8 MPa; after the feeding valve is closed, the temperature of the fermentation tank is adjusted to 90-120 ℃, and the fermentation is carried out for 2-3 hours at high temperature and high pressure (the specific time is determined according to the materials, the cattle and sheep manure can be obtained within 2-2.5 hours generally, and the chicken manure and the like are not easy to become thoroughly decomposed for 2.5-3 hours); after the decomposition is completed, an exhaust valve of the fermentation tank is opened, steam conveying is closed, the temperature of the fermentation tank is reduced to below 50 ℃ after about 2 hours, a discharge valve is opened, and the materials are conveyed to an aging device 9.
(4) And (3) conveying the material discharged from the discharge valve to an aging device 9 through a second conveying assembly, aging the material in the aging device 9 for 10-15 days, and turning and throwing the material once by using a turning and throwing machine every 3-4 days in the aging process, so that the material can be fully aged by frequently turning and throwing the material.
(5) The aged materials are conveyed to the crushing and screening device 3 through the third conveying assembly to be crushed and screened, then the materials are conveyed to the auxiliary material mixing device 5 through the fourth conveying assembly to be mixed, ingredients are added to the materials through the ingredient mixing device 4 in the conveying process, and the ingredients comprise a certain proportion of a microbial functional inoculant and a certain proportion of trace elements. Crushing the aged material, and screening to obtain a uniform organic material; adding a microbial functional microbial inoculum (the functional microbial inoculum is provided by a professional functional microbial inoculum manufacturer and is generally selected from bacillus subtilis and bacillus licheniformis) according to the growth needs of crops, preferably selecting the functional microbial inoculum with the functions of fixing nitrogen, dissolving phosphorus, releasing potassium, resisting diseases, resisting stress and the like, and adding the functional microbial inoculum according to the proportion of 1-2 per mill; meanwhile, trace elements such as zinc and boron required by plant production are added in an amount of 2-5 per mill, nitrogen, phosphorus and potassium elements are added according to the growth fertilizer requirement rule of crops and seasonal differences, and the mixed materials are generally 6-8% of pure nitrogen, 3-5% of pure phosphorus and 5-7% of pure potassium. After the materials are added in proportion, the materials are conveyed to an auxiliary material mixing device 5 by a belt conveyor to be mixed.
(6) The material that will add the batching carries granulation, throwing circle and screening in the integrative device of granulation throwing circle 6 through fifth transportation subassembly, and on the granule fertilizer after the screening carried the sixth transportation subassembly, the powder fertilizer after the screening was carried the feeder hopper 12 through circulation transportation subassembly and is pelletized once more. The process of granulation adopts extrusion granulation, carries out the throwing circle after the granulation, sieves after the throwing circle again, and the purpose of screening is separately with granular fertilizer and powder fertilizer. In the granulation process, the moisture of the material is 25-33%.
(7) And (3) conveying the granulated fertilizer on the sixth transportation assembly to a drying device 7 for drying operation, controlling the temperature of a feed inlet of the drying device 7 to be 70-80 ℃, controlling the temperature of a discharge outlet of the drying device 7 to be below 30 ℃, simultaneously forming the fertilizer after drying, and controlling the moisture in the fertilizer to be below 20%.
(8) And conveying the dried fertilizer to a finished product packaging device 8, coating the fertilizer with a film, and packaging the finished product. And (3) conveying the granulated fertilizer with the moisture of less than 20% to a packaging scale through a conveyor for weighing, and performing film coating and bagging according to the requirements of customers.
The process for producing the granular composite microbial fertilizer is unique, fermentation is carried out in a fermentation tank, the decomposition is uniform and thorough, the weed seeds are thoroughly killed, and pathogenic bacteria are thoroughly killed. By adding the microbial agent and the trace elements, the defect of single component of the microbial fertilizer is overcome. The traditional process is high-temperature drying and dehydration, which is not beneficial to the survival of microbial agents. The method belongs to low-temperature drying, is favorable for survival of microorganism bacteria, and reduces cost by low-temperature drying. In the present invention, the structure of the device and the components are not described in detail in the prior art.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A preparation system of compound microbial fertilizer of granule which characterized in that: comprises a material mixing device (1), a high-temperature high-pressure fermentation device (2), a crushing and screening device (3), a batching device (4), an auxiliary material mixing device (5), a granulating and circle-throwing integrated device (6), a drying device (7) and a finished product packaging device (8), wherein the material mixing device (1) is connected with the sealable high-temperature high-pressure fermentation device (2) through a first transportation component, the high-temperature high-pressure fermentation device (2) is connected with an aging device (9) through a second transportation component, the aging device (9) is connected with the crushing and screening device (3) through a third transportation component, the crushing and screening device (3) is connected with the auxiliary material mixing device (5) through a fourth transportation component, the auxiliary material mixing device (5) is connected with the circulating granulating and circle-throwing integrated device (6) through a fifth transportation component, the granulating and circle-throwing integrated device (6) is connected with the drying device (7) through a sixth transportation component, the output end of the drying device (7) is connected with the finished product packaging device (8), the output end of the batching device (4) is matched with the fourth transportation component, and the high-temperature high-pressure fermentation device (2) is connected with a steam device (10) which is used for providing high-temperature high-pressure for the high-temperature high-pressure fermentation device (2).
2. The system for preparing granular composite microbial fertilizer as claimed in claim 1, wherein: the granulation and circle-throwing integrated device (6) comprises a support (11), a feed hopper (12), a granulation assembly (13), a circle-throwing assembly, a screening assembly and a circulating transportation assembly, wherein the feed hopper (12) is arranged at the top of the support (11) and is matched with the output end of the fifth transportation assembly, the granulation assembly (13) is hermetically connected to the lower side of the feed hopper (12), the input end of the circle-throwing assembly is hermetically connected with the output end of the granulation assembly (13), the output end of the circle-throwing assembly is hermetically connected with the input end of the screening assembly which is obliquely arranged, the output end of the screening assembly is matched with the sixth transportation assembly, a powder collection bin (14) is arranged on the lower side of the screening assembly, the powder collection bin (14) is fixedly arranged on the support (11) and is connected with the input end of the circulating transportation assembly, the output end of the circulating transportation component is connected with the feed hopper (12).
3. The system for preparing granular composite microbial fertilizer as claimed in claim 2, wherein: the circle throwing component comprises a first-level circle throwing component (15), a second-level circle throwing component (16), a first-level rotating shaft (17), a second-level rotating shaft (18), a driving motor (19) and a transmission component, the first-level rotating shaft (17) and the first-level circle throwing component (15) are coaxially arranged, the second-level circle throwing component (16) and the second-level rotating shaft (18) are coaxially arranged, the driving motor (19) is fixedly arranged on the support (11), the driving motor (19) is driven by the transmission component simultaneously, the first-level rotating shaft (17) and the second-level rotating shaft (18) are rotated, the lower end of the first-level rotating shaft (17) and the lower end of the second-level rotating shaft (18) are matched with and used for driving the screening component vibrates, a feeding hole is formed in the first-level circle throwing component (15), and the feeding hole is hermetically connected with the granulation component (13) through a bent pipe (20), one-level rounding part (15) with second grade rounding part (16) contact just communicates through transition hole (21), be provided with the bin outlet on second grade rounding part (16), the bin outlet with the cooperation of screening component.
4. A system for preparing granular composite microbial fertilizer according to claim 3, wherein: the transmission part comprises a rotating rod (22), a dustproof shell (23), first bevel gears (24) and second bevel gears (25), the rotating rod (22) is connected with an output shaft of a driving motor (19), two bevel gears (24) are arranged on the rotating rod (22), one-level rotating shaft (17) is provided with one bevel gear (24) matched with the second bevel gear (25), the upper end of the second-level rotating shaft (18) is provided with another bevel gear (24) matched with the second bevel gear (25), the first bevel gear (24) and the second bevel gear (25) are both arranged inside the dustproof shell (23), and the dustproof shell (23) is fixedly arranged on the support (11).
5. A system for preparing granular composite microbial fertilizer according to claim 3 or 4, wherein: the screening assembly comprises sliding rods (26), a reset spring (27), a screening box body (28) and an eccentric wheel (29), at least two sliding rods (26) are horizontally arranged on a support (11), the sliding rods (26) are parallel to each other, the screening box body (28) is arranged on the sliding rods (26) and can slide in a reciprocating mode along the length direction of the sliding rods (26), the screening box body (28) is obliquely arranged, the cross section of the screening box body is square, the upper end of the screening box body (28) is matched with a discharge hole, the lower end of the screening box body (28) is matched with a sixth transportation assembly, the reset spring (27) is sleeved at the two ends of each sliding rod (26), one end of the reset spring (27) is connected with the end portion of the sliding rod (26), the other end of the reset spring (27) is contacted with the side wall of the screening box body (28), the top of screening box (28) is provided with two rectangular holes (30), rectangular hole (30) are followed the length direction of screening box (28) sets up, the width of rectangular hole (30) with the diameter cooperation of eccentric wheel (29), one-level axis of rotation (17) with the lower extreme of second grade axis of rotation (18) all is provided with eccentric wheel (29), the dense powder hole that runs through that is equipped with on the downside of screening box (28).
6. A system for preparing granular composite microbial fertilizer according to claim 3 or 4, wherein: circulation transportation subassembly includes horizontal transport auger part (31), vertical transport auger part (32) and charge-in pipeline (33), horizontal transport auger part (31) sets up the bottom in storehouse (14) is collected to the powder, the output of horizontal transport auger part (31) with the lower extreme cooperation of vertical transport auger part (32), the upper end of vertical transport auger part (32) is passed through charge-in pipeline (33) with feeder hopper (12) link to each other, charge-in pipeline (33) slope sets up and makes things convenient for powdered fertilizer to enter into in feeder hopper (12).
7. A system for preparing granular composite microbial fertilizer according to claim 3 or 4, wherein: the screening box body (28) is connected with the second-level rounding part (16) through a flexible pipeline in a sealing mode, and a discharge port is formed in the second-level rounding part.
8. A system for producing a granular composite microbial fertilizer as claimed in claim 2, 3 or 4, wherein: a loose and sealed material blocking layer (34) is arranged between the lower surface of the screening box body (28) and the opening at the upper end of the powder collecting bin (14).
9. The system for preparing granular composite microbial fertilizer as claimed in claim 5, wherein: the fixed storehouse (35) of stabilizing that is provided with on support (11), the upper end in stable storehouse (35) with the output cooperation of screening box (28), the lower extreme in stable storehouse (35) is provided with the blanking mouth, the blanking mouth with the cooperation of sixth transportation subassembly.
10. The method for preparing a granular composite microbial fertilizer as claimed in any one of claims 1 to 9, wherein the granular composite microbial fertilizer comprises the following steps: the preparation method comprises the following steps:
s1: putting the accumulated poultry excrement, the straw powder and the leftovers in the slaughterhouse in a material mixing device (1) according to a certain proportion for mixing raw materials, wherein the moisture of the raw materials is 40-50%;
s2: conveying the mixed raw materials to the high-temperature high-pressure fermentation device (2) through the first conveying assembly, wherein the high-temperature high-pressure fermentation device (2) is used for stirring simultaneously in the feeding process;
s3: the volume of the raw materials in the high-temperature high-pressure fermentation device (2) is not more than 85% of the volume of the high-temperature high-pressure fermentation device (2), after feeding is completed, a feeding valve arranged at the top of the high-temperature high-pressure fermentation device (2) is closed, then steam is introduced into the high-temperature high-pressure fermentation device (2) through the steam device (10) for fermentation, the temperature in the high-temperature high-pressure fermentation device (2) is controlled to be 90-120 ℃, the pressure in the high-temperature high-pressure fermentation device is controlled to be 0.75-0.8 MPa, the temperature and the pressure are kept until the raw materials reach the maturity degree in the high-temperature high-pressure fermentation device (2), then a valve between the steam device (10) and the high-temperature high-pressure fermentation device (2) is closed, then an exhaust valve on the high-temperature high-pressure fermentation device (2) is opened, and when the temperature in the high-temperature high-pressure fermentation device (2) is reduced to be below 50 ℃, opening a discharge valve at the bottom of the high-temperature high-pressure fermentation device (2);
s4: the material discharged from the discharge valve is conveyed into an aging device (9) through the second conveying assembly, the material is aged in the aging device (9) for 10-15 days, and the material is turned and thrown once by a turner every 3-4 days in the aging process;
s5: conveying the aged material to a crushing and screening device (3) through a third conveying assembly for crushing and screening, then conveying the material to an auxiliary material mixing device (5) through a fourth conveying assembly for mixing, and adding ingredients to the material through an ingredient mixing device (4) in the conveying process, wherein the ingredients comprise a certain proportion of a microbial functional inoculant and a certain proportion of trace elements;
s6: materials added with ingredients are conveyed into the granulation and circle-throwing integrated device (6) through the fifth conveying assembly to be granulated, circle-thrown and screened, screened granulated fertilizers are conveyed onto the sixth conveying assembly, and screened powdered fertilizers are conveyed into a feed hopper (12) through the circulating conveying assembly to be granulated again;
s7: conveying the granulated fertilizer on the sixth conveying assembly into a drying device (7) for drying operation, controlling the temperature of a feed inlet of the drying device (7) to be 70-80 ℃, controlling the temperature of a discharge outlet of the drying device (7) to be below 30 ℃, simultaneously forming the fertilizer after drying, and controlling the moisture in the fertilizer to be below 20%;
s8: and conveying the dried fertilizer to the finished product packaging device (8) for film wrapping, and then packaging the finished product.
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| CN112023830A (en) * | 2020-08-18 | 2020-12-04 | 朱涛 | Biological organic fertilizer circulation granulation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115007064A (en) * | 2022-07-08 | 2022-09-06 | 刘久光 | Compound microbial fertilizer preparation system |
| CN115007064B (en) * | 2022-07-08 | 2023-06-16 | 新疆苏丰生物科技有限公司 | Compound microbial fertilizer preparation system |
| CN116675565A (en) * | 2023-08-02 | 2023-09-01 | 北京蓟城智造科技有限公司 | Preparation method and equipment for ecological restoration soil matrix |
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Application publication date: 20211109 |