CN110885263A - Special selenium-rich organic fertilizer blending device for saline-alkali soil improvement rice - Google Patents
Special selenium-rich organic fertilizer blending device for saline-alkali soil improvement rice Download PDFInfo
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- CN110885263A CN110885263A CN201911140671.7A CN201911140671A CN110885263A CN 110885263 A CN110885263 A CN 110885263A CN 201911140671 A CN201911140671 A CN 201911140671A CN 110885263 A CN110885263 A CN 110885263A
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- box
- driving motor
- stirring
- saline
- organic fertilizer
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/50—Movable or transportable mixing devices or plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
- B01F33/831—Devices with consecutive working receptacles, e.g. with two intermeshing tools in one of the receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
- B01F33/83612—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by crushing or breaking
-
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a selenium-rich organic fertilizer blending device special for rice improved in saline-alkali soil, which comprises a first stirring box; a first feeding hole is formed in one side of the first stirring box; a first driving motor is installed at the top end of the outer part of the first stirring box; the first driving motor is connected with one end of the first commutator through a shaft; the other end of the first commutator is provided with a stirring shaft; a plurality of stirring paddles are arranged on the stirring shaft; the bottom end of the first stirring box is communicated with the fermentation box through a first discharge valve; the fermentation box is communicated with the mixing box through a first discharge pipe; the mixing box is communicated with the cooling box through a second discharge pipe; a cooler and a second feeding hole are arranged on the outer side of the cooling box; the top of the cooling box is provided with a roasting box; the roasting box is communicated with the crushing box through a second discharge valve; a third feeding hole is formed in one side of the crushing box; the fermentation box, the mixing box and the cooling box are arranged on the base; a control panel is arranged on the base; the bottom end of the base is provided with a supporting rod. The invention has convenient use and high working efficiency.
Description
Technical Field
The invention relates to the technical field of agriculture, in particular to a selenium-rich organic fertilizer blending device special for rice improvement in saline-alkali soil.
Background
Selenium is one of essential trace elements for human body, and more researches show that reasonable selenium intake can improve the immunity of human body; if the intake is insufficient, keshan disease and Kaschin-Beck disease will occur. As staple food for residents in China, if the rice is rich in selenium, people can absorb enough selenium from the rice in three daily meals, so that the overall physical quality of the residents in China is gradually improved; most of the current best rice planting areas in China are saline-alkali soil, which wastes land resources greatly and needs organic fertilizer to improve soil characteristics, so that the rice grows healthily.
Therefore, in view of the above current situation, a selenium-rich organic fertilizer blending device special for rice improvement in saline-alkali soil is urgently needed to be researched.
Disclosure of Invention
The invention aims to provide a selenium-rich organic fertilizer blending device special for rice improved in saline-alkali soil, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a selenium-rich organic fertilizer blending device special for improving rice in saline-alkali soil comprises a first stirring box; a first feeding hole is formed in one side of the first stirring box; a first driving motor is installed at the top end of the outer part of the first stirring box; the first driving motor is connected with one end of the first commutator through a shaft; the other end of the first commutator is provided with a stirring shaft; a plurality of stirring paddles are arranged on the stirring shaft; the bottom end of the first stirring box is communicated with the fermentation box through a first discharge valve; the fermentation box is communicated with the mixing box through a first discharge pipe; the mixing box is communicated with the cooling box through a second discharge pipe; a cooler and a second feeding hole are arranged on the outer side of the cooling box; the top of the cooling box is provided with a roasting box; the roasting box is communicated with the crushing box through a second discharge valve; a third feeding hole is formed in one side of the crushing box; the fermentation box, the mixing box and the cooling box are arranged on the base; a control panel is arranged on the base; the bottom end of the base is provided with a supporting rod.
As a further scheme of the invention: and a timer and a heater are arranged on the outer side of the fermentation box.
As a further scheme of the invention: a third driving motor is arranged at the outer top of the crushing box; the third driving motor is connected with the intermittent mechanism through a shaft; the intermittent mechanism is connected with a material pressing device through an electric lifting rod.
As a further scheme of the invention: a fourth driving motor is arranged on the outer side of the crushing box; and a cutter is arranged in the crushing box corresponding to the fourth driving motor.
As a further scheme of the invention: the cutter comprises an electric telescopic rod; a plurality of first cutting edges are movably arranged on the electric telescopic rod; a second cutting edge is arranged on the first cutting edge; the electric telescopic rod is connected with the first cutting edge through a pressure spring.
As a further scheme of the invention: a cooling pipe is arranged in the cooling box corresponding to the cooler; a fifth driving motor is installed at the bottom end inside the cooling box; the fifth driving motor is connected with the turntable through a coupler; two second stirrers are symmetrically arranged on the top of the turntable about the central axis of the turntable.
As a further scheme of the invention: a second driving motor is installed at the outer top of the mixing box; the second driving motor is connected with the second commutator through a shaft; the bottom end of the second commutator is connected with a first stirrer through a shaft; and a discharge port is arranged on the mixing box.
As a further scheme of the invention: the control panel is electrically connected with a first driving motor, a timer, a heater, a second driving motor, a cooler, a fourth driving motor, a cutter, a third driving motor, an electric lifting rod and a fifth driving motor.
As a further scheme of the invention: the universal wheels are installed at the bottom ends of the supporting rods.
Compared with the prior art, the invention has the beneficial effects that: adding vinasse, vinegar residue, humic acid, yeast, lactobacillus and the like into a first stirring box through a first feeding hole; then the stirring paddle carries out clockwise and anticlockwise stirring on the mixture; after fully stirring, the mixture enters the fermentation box through a first discharge valve for fermentation, and the fermentation time and temperature are accurately controlled through a timer and a heater; after fermentation, the fermented product enters a mixing box through a first discharging pipe; raw materials such as calcium oxide, pyrite and the like are added into the crushing box through a third feeding hole; through the arrangement of a cutter, an intermittent mechanism, an electric lifting rod and a material pressing device, raw materials such as calcium oxide, pyrite and the like are fully crushed; after being crushed, the mixture enters a roasting box through a second discharge valve for roasting; after roasting, entering a cooling box; the cooling box fully stirs the raw materials such as calcium oxide, pyrite and the like through the arrangement of the turntable, the second stirrer and the fifth driving motor, and the cooling pipe fully cools the raw materials; after cooling, selenium-decomposing bacteria, sulfuric acid, zinc sulfate and river sand are added through a second feeding hole and then stirred; after stirring, the mixture enters a mixing box through a second discharging pipe; the required organic fertilizer can be obtained by mixing the raw materials entering through the first discharging pipe and the raw materials entering through the second discharging pipe through the first stirrer. In conclusion, the invention has the advantages of convenient use and high working efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the structure of the cutter of the present invention.
Fig. 3 is a schematic view of the structure of the cooling tank of the present invention.
In the figure: 1-a feeding port, 2-a driving motor, 3-a commutator, 4-a stirring box, 5-a stirring shaft, 6-a stirring paddle, 7-a discharging valve, 8-a fermentation box, 9-a timer, 10-a heater, 11-a discharging pipe, 12-a mixing box, 13-a second driving motor, 14-a commutator, 15-a stirrer, 16-a cooler, 17-a second discharging pipe, 18-a cooling box, 19-a second feeding port, 20-a baking box, 21-a second discharging valve, 22-a crushing box, 23-a fourth driving motor, 24-a cutter, 25-a third driving motor, 26-an intermittent mechanism, 27-a third feeding port, 28-an electric lifting rod, 29-a material pressing device, 30-an electric telescopic rod, 31-a first cutting edge, 32-a second cutting edge, 33-a pressure spring, 34-a cooling pipe, 35-a rotary table, 36-a second stirrer, 37-a fifth driving motor, 38-a base, 39-a control panel and 40-a supporting rod.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1
Referring to fig. 1-3, in the embodiment of the invention, a selenium-rich organic fertilizer blending device special for rice improvement in saline-alkali soil comprises a first stirring box 4; a first feeding hole 1 is formed in one side of the first stirring box 4; the top end of the outer part of the first stirring box 4 is provided with a first driving motor 2; the first driving motor 2 is connected with one end of the first commutator 3 through a shaft; the other end of the first commutator 3 is provided with a stirring shaft 5; a plurality of stirring paddles 6 are arranged on the stirring shaft 5; through the arrangement of the first commutator 3, the stirring shaft 5 and the stirring paddle 6, the vinasse, the vinegar residue, the humic acid, the yeast and the lactic acid bacteria can be uniformly mixed and stirred; the bottom end of the first stirring box 4 is communicated with a fermentation box 8 through a first discharge valve 7; the fermentation box 8 is communicated with a mixing box 12 through a first discharge pipe 11; the mixing box 12 is communicated with a cooling box 18 through a second discharge pipe 17; a cooler 16 and a second feeding hole 19 are arranged on the outer side of the cooling box 18; the top of the cooling box 18 is provided with a roasting box 20; the roasting box 20 is communicated with a crushing box 22 through a second discharge valve 21; a third feeding hole 27 is formed in one side of the crushing box 22; the fermentation box 8, the mixing box 12 and the cooling box 18 are arranged on a base 38; a control panel 39 is arranged on the base 38; a support bar 40 is mounted to the bottom end of the base 38.
Further, a timer 9 and a heater 10 are installed on the outer side of the fermentation box 8; the optimal temperature of fermentation can be adjusted by the heater 10; the time of fermentation can be set by means of the timer 9.
Further, a third driving motor 25 is mounted at the outer top of the crushing box 22; the third driving motor 25 is connected with an intermittent mechanism 26 through a shaft; the intermittent mechanism 26 is connected with a material pressing device 29 through an electric lifting rod 28; through the arrangement of the intermittent mechanism 26, the electric lifting rod 28 and the swaging device 29, the crushing of the calcium oxide and the pyrite can be performed by intermittent lifting.
Further, a fourth driving motor 23 is installed on the outer side of the crushing box 22; a cutter 24 is arranged in the crushing box 22 corresponding to the fourth driving motor 23; the cutter 24 may perform cutting pulverization of calcium oxide and pyrite.
Further, the cutter 24 comprises an electric telescopic rod 30; a plurality of first cutting edges 31 are movably arranged on the electric telescopic rod 30; a second cutting edge 32 is arranged on the first cutting edge 31; the electric telescopic rod 30 is connected with the first cutting edge 31 through a pressure spring 33; the cutter 24 can be extended and retracted through the electric telescopic rod 30, so that the cutter 24 is prevented from interfering with the operation of the material pressing device 29; through the arrangement of the first cutting edge 31, the second cutting edge 32 and the pressure spring 33, when the cutter 24 works, the angle between the first cutting edge 31 and the electric telescopic rod 30 can be changed according to the rotating speed, and the chopping effect is improved.
Further, a cooling pipe 34 is arranged inside the cooling box 18 corresponding to the cooler 16; the roasted raw material can be rapidly cooled through the cooling pipe 34; a fifth driving motor 37 is installed at the bottom end inside the cooling box 18; the fifth driving motor 37 is connected with the turntable 35 through a coupler; two second stirrers 36 are symmetrically arranged on the top of the rotary table 35 about the central axis of the rotary table 35.
Further, a second driving motor 13 is mounted at the outer top of the mixing box 12; the second driving motor 13 is connected with a second commutator 14 through a shaft; the bottom end of the second commutator 14 is connected with a first stirrer 15 through a shaft; through the arrangement of the second reverser 14 and the first stirrer 15, the organic fertilizer can be fully and uniformly mixed; and a discharge outlet is arranged on the mixing box 12 and can discharge the prepared organic fertilizer.
Further, the method comprises the following steps of; the control panel 39 is electrically connected with the first driving motor 2, the timer 9, the heater 10, the second driving motor 13, the cooler 16, the fourth driving motor 23, the cutter 24, the third driving motor 25, the electric lifting rod 28 and the fifth driving motor 37; the rotating speed of the first driving motor 2, the second driving motor 13, the fourth driving motor 23, the third driving motor 25 and the fifth driving motor 37, the expansion and contraction of the cutter 24 and the electric lifting rod 28 and the heating temperature of the heater 10 can be controlled.
Example 2
Referring to fig. 1, universal wheels are mounted at the bottom end of the support rod 40; through the setting of universal wheel, the device is more convenient to use.
The working principle of the invention is as follows: adding vinasse, vinegar residue, humic acid, yeast, lactobacillus and the like into a first stirring box 4 through a first feeding hole 1; then the stirring paddle 6 is used for clockwise and anticlockwise stirring; after fully stirring, the mixture enters a fermentation box 8 through a first discharge valve 7 for fermentation, and the fermentation time and temperature are accurately controlled through a timer 9 and a heater 10; after fermentation, the fermented product enters a mixing box 12 through a first discharging pipe 11; raw materials such as calcium oxide and pyrite are added into the crushing box 22 through a third feeding hole 27; through the arrangement of the cutter 24, the intermittent mechanism 26, the electric lifting rod 28 and the material pressing device 29, raw materials such as calcium oxide, pyrite and the like are fully crushed; after being crushed, the crushed materials enter a roasting box 20 through a second discharge valve 21 for roasting; after roasting, the mixture enters a cooling box 18; the cooling box 18 fully stirs raw materials such as calcium oxide, pyrite and the like through the arrangement of the rotary disc 35, the second stirrer 36 and the fifth driving motor 37, and the cooling pipe 34 fully cools the raw materials; after cooling, selenium-decomposing bacteria, sulfuric acid, zinc sulfate and river sand are added through a second feeding hole 19 and then stirred; after stirring, the mixture enters a mixing box 12 through a second discharging pipe 17; the first stirrer 15 mixes the raw materials entering through the first discharging pipe 11 and the raw materials entering through the second discharging pipe 17 to obtain the required organic fertilizer. The invention has convenient use and high working efficiency.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A selenium-rich organic fertilizer blending device special for improving rice in saline-alkali soil comprises a first stirring box (4); the device is characterized in that a first feeding hole (1) is arranged on one side of the first stirring box (4); a first driving motor (2) is mounted at the top end of the outer part of the first stirring box (4); the first driving motor (2) is connected with one end of the first commutator (3) through a shaft; the other end of the first commutator (3) is provided with a stirring shaft (5); a plurality of stirring paddles (6) are arranged on the stirring shaft (5); the bottom end of the first stirring box (4) is communicated with the fermentation box (8) through a first discharge valve (7); the fermentation box (8) is communicated with a mixing box (12) through a first discharge pipe (11); the mixing box (12) is communicated with a cooling box (18) through a second discharge pipe (17); a cooler (16) and a second feeding hole (19) are arranged on the outer side of the cooling box (18); the top of the cooling box (18) is provided with a roasting box (20); the roasting box (20) is communicated with the crushing box (22) through a second discharge valve (21); a third feeding hole (27) is formed in one side of the crushing box (22); the fermentation box (8), the mixing box (12) and the cooling box (18) are arranged on a base (38); a control panel (39) is arranged on the base (38); the bottom end of the base (38) is provided with a support rod (40).
2. The blending device of the selenium-rich organic fertilizer specially used for the rice improved in the saline-alkali soil according to claim 1, wherein a timer (9) and a heater (10) are installed outside the fermentation box (8).
3. The selenium-rich organic fertilizer blending device special for rice in saline-alkali soil improvement according to claim 1, wherein a third driving motor (25) is installed at the outer top of the crushing box (22); the third driving motor (25) is connected with an intermittent mechanism (26) through a shaft; the intermittent mechanism (26) is connected with a material pressing device (29) through an electric lifting rod (28).
4. The blending device of the selenium-rich organic fertilizer specially used for the rice improved in the saline-alkali soil according to claim 3, wherein a driving motor (23) with four numbers is installed outside the crushing box (22); and a cutter (24) is arranged in the crushing box (22) corresponding to the fourth driving motor (23).
5. The blending device of the selenium-rich organic fertilizer specially used for the rice improved in the saline-alkali soil according to claim 4, wherein the cutter (24) comprises an electric telescopic rod (30); a plurality of first cutting edges (31) are movably arranged on the electric telescopic rod (30); a second cutting edge (32) is arranged on the first cutting edge (31); the electric telescopic rod (30) is connected with the first cutting edge (31) through a pressure spring (33).
6. The selenium-rich organic fertilizer blending device special for rice in saline-alkali soil improvement according to claim 1, wherein a cooling pipe (34) is arranged in the cooling box (18) corresponding to the cooler (16); a fifth driving motor (37) is installed at the bottom end inside the cooling box (18); the fifth driving motor (37) is connected with the turntable (35) through a coupling; two second stirrers (36) are symmetrically arranged on the top of the rotary table (35) about the central axis of the rotary table (35).
7. The selenium-rich organic fertilizer blending device special for rice in saline-alkali soil improvement according to claim 1, wherein a second driving motor (13) is installed at the outer top of the mixing box (12); the second driving motor (13) is connected with a second commutator (14) through a shaft; the bottom end of the second commutator (14) is connected with a first stirrer (15) through a shaft; the mixing box (12) is provided with a discharge hole.
8. The selenium-rich organic fertilizer blending device special for rice in saline-alkali soil improvement according to claim 1, wherein the control panel (39) is electrically connected with a first driving motor (2), a timer (9), a heater (10), a second driving motor (13), a cooler (16), a fourth driving motor (23), a cutter (24), a third driving motor (25), an electric lifting rod (28) and a fifth driving motor (37).
9. The blending device of selenium-rich organic fertilizer specially used for rice in saline-alkali soil improvement according to claim 1, wherein universal wheels are installed at the bottom end of the support rod (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911140671.7A CN110885263A (en) | 2019-11-20 | 2019-11-20 | Special selenium-rich organic fertilizer blending device for saline-alkali soil improvement rice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911140671.7A CN110885263A (en) | 2019-11-20 | 2019-11-20 | Special selenium-rich organic fertilizer blending device for saline-alkali soil improvement rice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110885263A true CN110885263A (en) | 2020-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911140671.7A Withdrawn CN110885263A (en) | 2019-11-20 | 2019-11-20 | Special selenium-rich organic fertilizer blending device for saline-alkali soil improvement rice |
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| CN (1) | CN110885263A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979362A (en) * | 2021-02-04 | 2021-06-18 | 盛茂龙生物科技(仁化)有限公司 | Device for preparing organic fertilizer by utilizing tobacco stem fragments and preparation method thereof |
-
2019
- 2019-11-20 CN CN201911140671.7A patent/CN110885263A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979362A (en) * | 2021-02-04 | 2021-06-18 | 盛茂龙生物科技(仁化)有限公司 | Device for preparing organic fertilizer by utilizing tobacco stem fragments and preparation method thereof |
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Application publication date: 20200317 |
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| WW01 | Invention patent application withdrawn after publication |