CN110950715A - Proteolysis post-treatment method for organic fertilizer raw material - Google Patents
Proteolysis post-treatment method for organic fertilizer raw material Download PDFInfo
- Publication number
- CN110950715A CN110950715A CN201911202850.9A CN201911202850A CN110950715A CN 110950715 A CN110950715 A CN 110950715A CN 201911202850 A CN201911202850 A CN 201911202850A CN 110950715 A CN110950715 A CN 110950715A
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- Prior art keywords
- block
- material containing
- inner barrel
- organic fertilizer
- containing block
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003895 organic fertilizer Substances 0.000 title claims abstract description 20
- 239000002994 raw material Substances 0.000 title claims abstract description 17
- 230000017854 proteolysis Effects 0.000 title claims description 15
- 239000000463 material Substances 0.000 claims abstract description 62
- 238000001914 filtration Methods 0.000 claims abstract description 49
- 235000021190 leftovers Nutrition 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 239000000706 filtrate Substances 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 13
- 241000194108 Bacillus licheniformis Species 0.000 claims description 4
- 241000235342 Saccharomycetes Species 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 11
- 102000004169 proteins and genes Human genes 0.000 description 7
- 108090000623 proteins and genes Proteins 0.000 description 7
- 108091005804 Peptidases Proteins 0.000 description 3
- 239000004365 Protease Substances 0.000 description 3
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000012982 microporous membrane Substances 0.000 description 2
- 125000001477 organic nitrogen group Chemical group 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 101150114468 TUB1 gene Proteins 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F1/00—Fertilisers made from animal corpses, or parts thereof
- C05F1/005—Fertilisers made from animal corpses, or parts thereof from meat-wastes or from other wastes of animal origin, e.g. skins, hair, hoofs, feathers, blood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the field of organic fertilizer production, in particular to an enzymolysis post-treatment method of an organic fertilizer raw material, which comprises the following steps of 1: mixing the minced leftovers with water, adding a strain for enzymolysis for a period of time, and preparing a filtering device, wherein the filtering device comprises an inner blockage removing block and a material containing block, the inner blockage removing block is arranged in an inner barrel in a sliding mode, the material containing block is arranged in the inner barrel in a rotating mode, and filtering holes are formed in the side wall of the inner barrel; step 2: putting the leftovers into a material containing block, wherein the material containing block rotates in an inner barrel to filter the leftovers, and simultaneously, a blockage removing block pushes the material containing block to move, so that the leftovers in the material containing block are in contact with different positions of the side wall of the inner barrel; and step 3: the blockage removing block pushes the material containing block to move, and meanwhile, filter residues adhered to the side wall of the inner cylinder are removed; and 4, step 4: in step 3, the residue adhered in the filtering hole is sucked out by the negative pressure difference formed between the upper space and the lower space of the blockage cleaning block. When the technical scheme is adopted, the leftovers can be filtered in batches.
Description
Technical Field
The invention relates to the field of organic fertilizer production, in particular to a method for treating an organic fertilizer raw material after proteolysis.
Background
The nutrients of the liquid organic fertilizer are derived from animals, plants or minerals, the production raw materials of the organic fertilizer comprise animal leftovers, and the protein-state organic nitrogen is converted into water-soluble organic nitrogen and quick-acting nitrogen by hydrolyzing protein in the leftovers.
Before hydrolyzing protein in the leftovers, carrying out enzymolysis on the leftovers to obtain an enzymolysis solution, and then filtering the enzymolysis solution to obtain a protein-containing filtrate; at present, a microporous membrane is usually adopted to filter enzymolysis liquid after enzymolysis, the enzymolysis liquid contains leftovers which are not completely decomposed, and because the microporous membrane has small aperture and low filtering speed, the membrane is easy to block, and needs to be repeatedly cleaned in the filtering process, so that the operation is inconvenient, and the filtering treatment of large-scale leftovers is not facilitated.
Disclosure of Invention
The invention aims to provide a method for filtering leftovers in batches.
In order to achieve the aim, the technical scheme of the invention provides a proteolysis post-treatment method for an organic fertilizer raw material, which comprises the following steps:
step 1: mixing the minced leftovers with water, adding a strain for enzymolysis for a period of time, and preparing a filtering device, wherein the filtering device comprises an inner barrel, a blockage removing block arranged in the inner barrel in a sliding manner and a material containing block arranged in the inner barrel in a rotating manner, and filtering holes are formed in the side wall of the inner barrel;
step 2: putting the leftovers into a material containing block, wherein the material containing block rotates in an inner barrel to filter the leftovers, and simultaneously, a blockage removing block pushes the material containing block to move, so that the leftovers in the material containing block are in contact with different positions of the side wall of the inner barrel;
and step 3: the blockage removing block pushes the material containing block to move, and meanwhile, filter residues adhered to the side wall of the inner cylinder are removed;
and 4, step 4: in step 3, the residue adhered in the filtering hole is sucked out by the negative pressure difference formed between the upper space and the lower space of the blockage cleaning block.
The technical effect of the scheme is as follows: after adding a strain into the minced leftovers, producing protease through the strain, effectively decomposing protein in the leftovers by the protease, driving the leftovers to rotate in the rotating process of the material containing block after the lower leftovers are placed in the material containing block, and carrying out centrifugal filtration on the protein in the leftovers; the blockage removing block pushes the material containing block to move upwards in the upward movement process, the material containing block is in a rotating state, and leftovers in the material containing block are in contact with different positions of the side wall of the inner barrel, so that smooth filtration of the filtration hole in the side wall of the inner barrel is ensured during filtration, and smooth filtration is ensured; clear up the filter residue of blockking up on the inner tube lateral wall of adhesion when piece rebound, because clear up blockking up when the piece rebound and the space that forms between the inner tube crescent, clear up the upper and lower negative pressure difference that forms of blockking up to with the residue suction of adhesion in the filtration pore, the filtration pore that filters on the inner tube lateral wall when guaranteeing to filter once more keeps unobstructed, ensure to go on smoothly in the filtering operation of leftover bits in batches.
Further, the strain in the step 1 is saccharomycete or bacillus licheniformis. The technical effect of the scheme is as follows: the strain is saccharomycete or bacillus licheniformis which can produce protease more quickly and ensure that the protein in the leftovers can be decomposed more quickly and effectively.
Further, the aperture of the filtering hole in the step 1 is 0.45 μm. The technical effect of the scheme is as follows: the filter liquor and the protein are ensured to pass through the filter holes, and the mixing amount of the residues is reduced.
Further, the filtering device in the step 1 further comprises a frame, an outer barrel, a feeding pipe, a partition plate and a filtering mechanism; the outer barrel is fixed on the frame, the inner barrel is arranged in the outer barrel, a discharge hole is formed in the side wall of the inner barrel and is positioned at the upper end of the inner barrel, the outer barrel is divided into a filtrate cavity and a residue cavity by the partition plate, and the residue cavity is positioned above the filtrate cavity; the filtering mechanism comprises a screw rod, the screw rod is rotationally arranged in the inner barrel, the blockage removing block is in threaded connection with the screw rod, and holes are formed in the blockage removing block; the screw rod is provided with a sliding groove along the axial direction, a sliding block is fixed on the material containing block, the sliding block is arranged in the sliding groove in a sliding manner, and the side wall of the material containing block is provided with an annular groove; the blockage removing block is positioned below the material containing block, a push-pull rod is fixed on the blockage removing block, and the upper end of the push-pull rod is in contact with the material containing block; the feeding pipe penetrates through the barrel walls on one sides of the outer barrel and the inner barrel and can be communicated with the annular groove. The technical effect of the scheme is as follows: after the minced leftovers enter the annular groove through the feeding pipe, in the rotating process of the screw rod, the material containing block is driven to rotate through the sliding block, so that the leftovers in the annular groove are driven to rotate, the leftovers are centrifugally filtered, and filtrate enters a filtrate cavity to be collected after passing through the filter holes; the screw rod drives the blockage removing block to move upwards in the rotating process, so that the material containing block and the sliding block are pushed to move upwards through the push-pull rod, the material containing block is in a rotating state, and leftovers in the material containing block are in contact with different positions of the side wall of the inner cylinder; clear up the filter residue of blockking up on the lateral wall of inner tube to the adhesion when the piece rebound, because clear up the space crescent that forms between blockking up the piece rebound and the inner tube, clear up the upper and lower negative pressure difference that forms of blockking up to with the residue suction of adhesion in the filter hole.
Furthermore, an annular cavity is formed in the material containing block, a push-pull block is fixed at the upper end of the push-pull rod, and the push-pull block is rotatably arranged in the annular cavity. The technical effect of the scheme is as follows: in the process of reverse rotation of the screw, the material containing block can be ensured to smoothly move downwards under the action of the push-pull rod and the push-pull block.
Further, the slide block is T-shaped. The technical effect of the scheme is as follows: when the material containing block moves to the discharge port, the material containing block can be stably connected with the screw rod through the sliding block.
Furthermore, an arc-shaped groove is formed in the upper surface of the blockage removing block. The technical effect of the scheme is as follows: the residue on the side wall of the inner barrel can be collected in the arc-shaped groove after being scraped by the blockage removing block, so that the residue can be conveniently dropped into the inner barrel through the hole, and the residue is prevented from being adhered to the inner barrel again.
Further, the filtering mechanism further comprises a servo motor, the servo motor is located outside the outer barrel, and the servo motor is fixed on the rack. The technical effect of the scheme is as follows: the normal operation of the servo motor is prevented from being influenced by the residues, and smooth operation of all parts of the filtering mechanism is ensured.
Furthermore, supporting blocks are fixed on the inner side wall of the outer barrel and the outer side wall of the inner barrel, and the partition plates are placed on the supporting blocks. The technical effect of the scheme is as follows: after the partition plate is taken down from the supporting block, the filtrate cavity is convenient to clean.
Further, the bottom of the outer barrel is obliquely arranged. The technical effect of the scheme is as follows: the filtrate in the filtrate cavity is collected more thoroughly.
Drawings
FIG. 1 is a front cross-sectional view of a filter for filtering rejects in accordance with an embodiment of the present invention;
FIG. 2 is a front cross-sectional view of a completed filter according to an embodiment of the present invention;
fig. 3 is a top view of the screw of fig. 1 and 2.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises an outer barrel 1, an inner barrel 2, a material containing block 3, a feeding pipe 4, a partition plate 5, a discharge hole 6, a filtering hole 7, a supporting block 8, a filtrate cavity 9, a residue cavity 10, a material taking hole 11, a servo motor 12, a screw 13, a blockage removing block 14, a sliding groove 15, a sliding block 16, an annular groove 17, a hole 18, a push-pull rod 19 and a push-pull block 20.
Example 1:
the proteolysis post-treatment method of the organic fertilizer raw material comprises the following steps:
step 1: mixing the minced leftovers with water, and adding yeast or bacillus licheniformis for enzymolysis for 3 h; then, a filtering device as shown in fig. 1 is prepared, which comprises a frame, an outer barrel 1, an inner barrel 2, a material containing block 3, a feeding pipe 4, a partition plate 5 and a filtering mechanism, wherein the outer barrel 1 is fixed on the frame through bolts, the inner barrel 2 is installed in the outer barrel 1, the lower end of the inner barrel 2 is welded with the bottom of the outer barrel 1, and the upper ends of the outer barrel 1 and the inner barrel 2 are both connected with a cover body through threads.
The side wall of the inner barrel 2 is provided with a discharge port 6 and a plurality of filtering holes 7, the aperture of the filtering holes 7 is 0.45 mu m, and the discharge port 6 is positioned at the upper end of the inner barrel 2; supporting blocks 8 are welded on the inner side wall of the outer barrel 1 and the outer side wall of the inner barrel 2, the partition plate 5 is in a ring shape, the partition plate 5 is placed on the supporting blocks 8, the space between the outer barrel 1 and the inner barrel 2 is divided into a filtrate cavity 9 and a residue cavity 10 by the partition plate 5, and the residue cavity 10 is located above the filtrate cavity 9. The bottom of the outer barrel 1 is inclined from left to right, the side walls of the outer barrel 1 and the inner barrel 2 are both provided with a material taking port 11, the material taking port 11 on the side wall of the inner barrel 2 and one material taking port 11 on the side wall of the outer barrel 1 are positioned at the bottom of the left side of the outer barrel 1, the other material taking port 11 on the side wall of the outer barrel 1 is positioned at the partition plate 5, and each material taking port 11 is provided with a sealing plug (not shown in the figure).
The filtering mechanism is similar to a ball screw pair, the filtering mechanism comprises a servo motor 12, a screw 13 and a blockage removing block 14, and the servo motor 12 is positioned outside the outer barrel 1 and fixedly arranged on the rack through bolts; the lower end of the screw 13 is welded with the output shaft of the servo motor 12, the screw 13 penetrates through the bottom end of the outer barrel 1 and then is rotatably arranged in the inner barrel 2, and the upper end of the screw 13 is rotatably connected with the cover body of the inner barrel 2.
The screw 13 is provided with a sliding groove 15 along the axial direction thereof as shown in fig. 3, as shown in fig. 1, a sliding block 16 is welded on the material containing block 3, the sliding block 16 is in a T shape, the sliding block 16 is arranged in the sliding groove 15 in a sliding manner, and the sliding block 16 is coated with graphite powder. The side wall of the material containing block 3 is contacted with the inner side wall of the inner barrel 2, the side wall of the material containing block 3 is provided with an annular groove 17, the lower surface of the material containing block 3 is provided with an annular cavity, and the feeding pipe 4 penetrates through the barrel walls on the right sides of the outer barrel 1 and the inner barrel 2 and then is communicated with the annular groove 17.
The clear jam piece 14 is located flourishing material piece 3 below, clear jam piece 14 and screw rod 13 threaded connection, and the welding has the stopper on the lateral wall of clear jam piece 14, and it has vertical spacing groove to open on the inside wall of interior bucket 2, and the stopper slides and sets up at spacing inslot (spacing piece and spacing groove are not shown in the figure). The upper surface of the blockage removing block 14 is provided with an arc-shaped groove, and the blockage removing block 14 is provided with a plurality of holes 18; a push-pull rod 19 is welded on the blockage removing block 14, a push-pull block 20 is welded at the upper end of the push-pull rod 19, the push-pull block 20 is rotatably arranged in the annular cavity, and graphite powder is coated on the push-pull block 20.
Step 2: as shown in fig. 1, after the minced leftovers are poured into the annular groove 17 through the feeding pipe 4, the servo motor 12 is manually started, and in the process that the servo motor 12 drives the screw 13 to rotate in the forward direction, the material containing block 3 is driven to rotate through the sliding block 16, so that the leftovers in the annular groove 17 are driven to rotate, the leftovers are centrifugally filtered, and the filtrate enters the filtrate chamber 9 to be collected after passing through the filter holes 7.
The screw 13 drives the blockage removing block 14 to move upwards in the forward rotating process, so that the material containing block 3 and the sliding block 16 are pushed to move upwards through the push-pull rod 19, the material containing block 3 is in a rotating state while the material containing block 3 moves upwards, leftovers in the material containing block 3 are in contact with different positions of the side wall of the inner barrel, the situation that the leftovers are in contact with the same position of the side wall of the inner barrel 2 all the time is avoided, the filter holes 7 in the side wall of the inner barrel are kept smooth during filtering, and smooth filtering is guaranteed.
And step 3: the filter residue adhered to the side wall of the inner cylinder is removed while the block 14 is moved upward.
And 4, step 4: when the blockage removing block 14 moves upwards, the volume of a space formed between the blockage removing block and the inner cylinder is gradually increased, the air pressure below the blockage removing block 14 is lower than the air pressure above the blockage removing block 14, and the formed air pressure difference sucks out residues adhered in the filtering holes 7.
When the blockage removing block 14 moves to the position shown in figure 2, residues in the blockage removing block 14 enter the residue cavity 10 through the discharge hole 6 to be collected, at the moment, the servo motor 12 rotates reversely, the blockage removing block 14 moves downwards and drives the rotating material containing block 3 to move downwards through the push-pull rod 19 and the push-pull block 20, when the material containing block 3 moves to the position shown in figure 1 again, the next batch of leftovers are filled into the annular groove 17, then the servo motor 12 rotates forwards and drives the material containing block 3 to move upwards, and because the residue adhered to the filter hole 7 is sucked out due to the air pressure difference, the filter hole 7 on the side wall of the inner barrel keeps a smooth state during secondary filtering, and the filtering operation of the batch leftovers is ensured to be carried out smoothly.
Example 2
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (10)
1. The proteolysis post-treatment method of the organic fertilizer raw material is characterized by comprising the following steps: the method comprises the following steps:
step 1: mixing the minced leftovers with water, adding a strain for enzymolysis for a period of time, and preparing a filtering device, wherein the filtering device comprises an inner barrel, a blockage removing block arranged in the inner barrel in a sliding manner and a material containing block arranged in the inner barrel in a rotating manner, and filtering holes are formed in the side wall of the inner barrel;
step 2: putting the leftovers into a material containing block, wherein the material containing block rotates in an inner barrel to filter the leftovers, and simultaneously, a blockage removing block pushes the material containing block to move, so that the leftovers in the material containing block are in contact with different positions of the side wall of the inner barrel;
and step 3: the blockage removing block pushes the material containing block to move, and meanwhile, filter residues adhered to the side wall of the inner cylinder are removed;
and 4, step 4: in step 3, the residue adhered in the filtering hole is sucked out by the negative pressure difference formed between the upper space and the lower space of the blockage cleaning block.
2. The proteolysis post-treatment method for organic fertilizer raw material as recited in claim 1, characterized in that: the strain in the step 1 is saccharomycete or bacillus licheniformis.
3. The proteolysis post-treatment method for organic fertilizer raw material as recited in claim 2, characterized in that: the aperture of the filtering hole in the step 1 is 0.45 μm.
4. The proteolysis post-treatment method for organic fertilizer raw material according to any one of claims 1 or 3, characterized by comprising the following steps: the filtering device in the step 1 further comprises a frame, an outer barrel, a feeding pipe, a partition plate and a filtering mechanism; the outer barrel is fixed on the frame, the inner barrel is arranged in the outer barrel, a discharge hole is formed in the side wall of the inner barrel and is positioned at the upper end of the inner barrel, the outer barrel is divided into a filtrate cavity and a residue cavity by the partition plate, and the residue cavity is positioned above the filtrate cavity; the filtering mechanism comprises a screw rod, the screw rod is rotationally arranged in the inner barrel, the blockage removing block is in threaded connection with the screw rod, and holes are formed in the blockage removing block; the screw rod is provided with a sliding groove along the axial direction, a sliding block is fixed on the material containing block, the sliding block is arranged in the sliding groove in a sliding manner, and the side wall of the material containing block is provided with an annular groove; the blockage removing block is positioned below the material containing block, a push-pull rod is fixed on the blockage removing block, and the upper end of the push-pull rod is in contact with the material containing block; the feeding pipe penetrates through the barrel walls on one sides of the outer barrel and the inner barrel and can be communicated with the annular groove.
5. The proteolysis post-treatment method for organic fertilizer raw material as recited in claim 4, characterized in that: the material containing block is provided with an annular cavity, the upper end of the push-pull rod is fixedly provided with a push-pull block, and the push-pull block is rotatably arranged in the annular cavity.
6. The proteolysis post-treatment method for organic fertilizer raw material as recited in claim 5, characterized in that: the slide block is T-shaped.
7. The proteolysis post-treatment method for organic fertilizer raw material as recited in claim 6, characterized in that: the upper surface of the blockage removing block is provided with an arc-shaped groove.
8. The proteolysis post-treatment method for organic fertilizer raw material as recited in claim 7, characterized in that: the filtering mechanism further comprises a servo motor, the servo motor is located outside the outer barrel and fixed on the rack.
9. The proteolysis post-treatment method for organic fertilizer raw material as recited in claim 8, characterized in that: supporting blocks are fixed on the inner side wall of the outer barrel and the outer side wall of the inner barrel, and the partition plates are placed on the supporting blocks.
10. The proteolysis post-treatment method for organic fertilizer raw material as recited in claim 9, characterized in that: the bottom of the outer barrel is obliquely arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911202850.9A CN110950715A (en) | 2019-11-29 | 2019-11-29 | Proteolysis post-treatment method for organic fertilizer raw material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911202850.9A CN110950715A (en) | 2019-11-29 | 2019-11-29 | Proteolysis post-treatment method for organic fertilizer raw material |
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| Publication Number | Publication Date |
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| CN110950715A true CN110950715A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911202850.9A Pending CN110950715A (en) | 2019-11-29 | 2019-11-29 | Proteolysis post-treatment method for organic fertilizer raw material |
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| Country | Link |
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| CN (1) | CN110950715A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827241A (en) * | 2021-01-06 | 2021-05-25 | 张超 | Preparation method of water-based paint |
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2019
- 2019-11-29 CN CN201911202850.9A patent/CN110950715A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827241A (en) * | 2021-01-06 | 2021-05-25 | 张超 | Preparation method of water-based paint |
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