CN103044133B - Controlled-release fertilizer resin and curing agent continuous mixer and working method thereof - Google Patents
Controlled-release fertilizer resin and curing agent continuous mixer and working method thereof Download PDFInfo
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Abstract
The invention relates to a controlled-release fertilizer resin and curing agent continuous mixing device and a working method thereof. A resin channel and a curing agent channel are arranged in a mixer body; a compressed air channel is arranged between the resin channel and the curing agent channel; a mixed liquid channel is opposite to the compressed air channel; the center line of the compressed air channel and the center line of the mixed liquid channel are located on a straight line; a mixing cavity communicated with the four channels is arranged between the mixed liquid channel and the resin channel, the curing agent channel and the compressed air channel; a spray head is arranged at an outlet of the mixed liquid channel; and when in mixing, the conveying pressure of the resin, curing agent and compressed air is controlled to be 0.3-0.5MPa. Through the invention, continuous mixing of resin and curing agent is realized in a controlled-release fertilizer production process, the mixing and coating are uniform, and the nutrients of the controlled-release fertilizer obtained by spraying are slowly released.
Description
Technical field
The present invention relates to a kind of Controlled Release Fertilizer resin and curing agent continuous mixing device, belong to controlled-release fertilizer production equipment technical field.
Background technology
Sulfur coated controlled release fertilizer is to be coated with one deck approximately 20 μ m sulphur films at urea or complex fertilizer particle surface, be coated with sealer outward at sulphur film again, can make fertilizer rate of release slow, simultaneously can be by the difference of bag sulphur thickness, control the deenergized period of fertilizer, generally can be controlled in 1 ~ 4 month, if wrap one deck resin to sulfur coated controlled release fertilizer, the controlled release phase can reach 12 months again again.Heat convertible resin coating urea is first urea granules preheating, thermosetting resin and curing agent thereof are mixed, be added on urea granules, solidify to form the rete of smooth densification, make required heat convertible resin coating urea, Chinese patent CN101372436A discloses a kind of heat convertible resin coating urea, and this control release urea has good controlled release properties, there is significant volume increase and synergistic effect, there is popularizing application prospect very widely.
After urea or fertilizer coating sulphur, bag is coated with in thermosetting resin process again, the adding method of resin and curing agent has two kinds, one is that resin and curing agent mix in advance, mix and spray to again fertilizer or bag sulfur fertilizer material surface, resin and curing agent mix like this, and can fully react, be conducive to the uniformity of coating, can play good sealing controlled-release function, but resin and curing agent just complete rapidly curing reaction for 4-5 minute after mixing, form integrated solid, can not continue to use, cause waste, manipulate very difficult, industrialization is produced and cannot be realized continuously, second method is that resin and curing agent add respectively, can realize so continuous production, but resin and curing agent layering are applied to bag sulfur fertilizer material surface, mix inhomogeneous, react thorough not, cause controlled-release effect undesirable, the consumption of resin and curing agent also will increase 10-15% simultaneously, greatly increase production cost, increased the weight of peasant burden.
Chinese patent CN102172485 discloses a kind of spray type fluid mixing device, by two fluid inlet tubes, fluid inlet tubes spray head, blender, mixer outlet pipe spray head, fluid issuing mixing tube and flow-disturbing net composition, blender is airtight container, article two, fluid inlet tubes is 120 degree angles and enters blender, fluid inlet tubes spray head is arranged in blender and makes fluid be conic jet to blender, blender is connected with fluid issuing mixing tube, mixer outlet pipe is provided with mixer outlet pipe spray head, fluid-mixing enters fluid issuing mixing tube by mixer outlet pipe spray head, the flow-disturbing net cylinder of shape sheet metal composition of turning back of serving as reasons, flow-disturbing net is fixed in fluid issuing mixing tube, realize the mixing of fluid, mix.This device in the time mixing, the power not advancing when fluid enters blender, easily blocking pipe, fluid-mixing is after flow-disturbing net, speed weakens, power or insufficient pressure can not play the effect of spray when outflow.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of simple in structure, the Controlled Release Fertilizer resin mixing and curing agent continuous mixing device, the present invention also provides a kind of method of utilizing this device to mix resin and curing agent.
Technical scheme of the present invention is as follows:
A kind of Controlled Release Fertilizer resin and curing agent continuous mixing device, comprise blender body, on the end face of one end of blender body, be provided with resin inlet and curing agent import, in blender body, be provided with the resin channels and the curing agent passage that are communicated with resin inlet and curing agent import, it is characterized in that: between resin inlet and curing agent import, be provided with compressed air inlet, between resin channels and curing agent passage, be provided with the compressed air channel being communicated with compressed air inlet, be oppositely arranged mixed liquor passage with compressed air channel, the center line of the center line of described compressed air channel and mixed liquor passage point-blank, mixed liquor passage and resin channels, between curing agent passage and compressed air channel, be provided with the hybrid chamber communicating with 4 passages, the exit of mixed liquor passage is provided with spray head.Described compressed air channel is relative with mixed liquor passage, is conducive to resin and curing agent fully mixes, and avoids mixed liquor to occur that eddy current causes mixing inhomogeneous and mixedly appears dead angle phenomenon.
The present invention is preferred, in described mixed liquor passage, is provided with helical blade, and helical blade runs through mixed liquor passage, and described helical blade is two, be arranged in parallel, and the direction of rotation of two helical blades is contrary.The mixed liquor of resin and curing agent enters mixed liquor passage from hybrid chamber under compressed-air actuated pressure, thereby provide pressure to mixed liquor spray, helical blade plays cushioning effect, and the mixed liquor of resin and curing agent is carried out to reduction of speed, buffering, makes the more abundant, even of resin and curing agent mixing.
The present invention is further preferred, and described helical blade setting-in is fixed in mixed liquor vias inner walls.
The present invention is preferred, described compressed air channel, mixed liquor channel setting are on the center line of blender body, resin channels, curing agent passage are symmetricly set on the both sides of compressed air channel, the outlet of the outlet of described resin channels, the outlet of curing agent passage, compressed air channel is connected with hybrid chamber jointly, and the angle between the center line of resin channels and the center line of compressed air channel is 30 °～55 °.This kind of design can avoid resin or curing agent directly to spray by hybrid chamber, is unlikely to be directly injected to in square channel, reacts to each other and causes passage to stop up, and contributes to like this resin and curing agent evenly to mix simultaneously.Described compressed air channel, mixed liquor channel setting are on the center line of blender body, resin channels, curing agent passage are symmetricly set on the both sides of compressed air channel, make the input of resin and curing agent more smooth and easy, avoid the impulsive force of compressed air channel to affect adding of resin and curing agent, prevent that resin, curing agent from sticking on conduit wall simultaneously.
The present invention is preferred, the volume of described hybrid chamber is 20～40ml, the cross section of described resin channels, curing agent passage, compressed air channel and mixed liquor passage is circle, the diameter of resin channels is consistent with the diameter of curing agent passage, the latus rectum of described compressed air channel is 25～50mm, the latus rectum of resin channels, curing agent passage is respectively 4～15mm, the latus rectum of described mixed liquor passage is 6～15mm, described spray head is Fan spray head, hollow cone shower nozzle or solid-cone shower nozzle, and on described spray head, spray orifice is of a size of 1.0 ~ 2.0mm.Compressed air channel, resin channels, curing agent passage, mixed liquor passage and spray orifice size are mutually mated to coordinate and have been guaranteed to make mixed liquor atomization by range of jet simultaneously, make the more even of material spraying, and the use amount of simultaneously saving mixed liquor, reduces production costs.
The material of described blender body is carbon steel, stainless steel or aluminium.
The method of utilizing said apparatus to mix resin and curing agent, comprises that step is as follows:
1), adjust resin, curing agent, compressed-air actuated discharge pressure, make resin, curing agent, compressed-air actuated discharge pressure be controlled at 0.3 ~ 0.5MPa, the pressure differential between pressure differential, curing agent discharge pressure and compressed air delivery pressure between resin transfer pressure and compressed air delivery pressure is all less than 0.02MPa;
2), resin, curing agent and compressed air enter in hybrid chamber along resin channels, curing agent passage and compressed air channel respectively; The mixed liquor of resin and curing agent enters mixed liquor passage under the promotion of pressure, and the spray head from mixed liquor channel exit after helical blade fully mixes sprays, Controlled Release Fertilizer surface after the mixed liquor of spray head ejection is painted on coating;
3), after spraying finishes, stop the conveying of resin and curing agent, continue compressed air channel to pass into compressed air, keep compressed air to purge 1～3 minute to hybrid chamber, mixed liquor residual in hybrid chamber is discharged;
4) after step 3) finishes, resin channels, curing agent passage are passed into compressed air simultaneously, keep compressed air to purge 2 ~ 5 minutes to resin channels and curing agent passage, respectively resin residual in resin channels, curing agent passage, curing agent are discharged;
5) after step 4) finishes, repeating step 3), until residual mixed liquor is got rid of clean in hybrid chamber.
The present invention is preferred, and in described step 3), step 4), compressed-air actuated pressure is 0.5 ~ 0.8MPa.
Preferably, step 2) in mixed liquor be 0.3～0.5MP from the pressure of the shower nozzle ejection of mixed liquor channel exit, the feed flow of mixed liquor is 5-100L/ hour.
Step 1) of the present invention, resin, curing agent, compressed-air actuated discharge pressure are controlled at 0.3 ~ 0.5MPa, and in the too low spraying process of discharge pressure, atomizing effect is poor, and crawling is even, and spraying effect is bad, causes the wasting of resources; Discharge pressure high atomization is effective, but in controlled-release fertilizer production process, system has tail gas negative pressure, can cause resin and curing agent to be caused and be sprayed onto fertilizer surface completely by exhaust system carrying-off, from affecting Controlled Release Fertilizer control releasing effect.Pressure differential between pressure differential, curing agent discharge pressure and compressed air delivery pressure between resin transfer pressure and compressed air delivery pressure is all less than 0.02MPa, the excessive or too small normal conveying that all can affect the other side of pressure differential.
Resin of the present invention, curing agent, compressed-air actuated discharge pressure are identical, and effect is best.
After described step 3) spraying finishes, keep the compressed-air actuated conveying of compressed air channel, compressed air is discharged the mixed liquor accumulating in hybrid chamber completely from hybrid channel, can avoid remaining mixed liquor to solidify in hybrid chamber and hybrid channel, and the continuation that affects device is used.Resin channels and curing agent passage are purged respectively, blow down resin and curing agent that resin channels and curing agent passage are remaining, prevent remnant blocking channel, avoid the continuation that affects this device to use.
Compared with prior art beneficial effect of the present invention is as follows:
1, adopt device of the present invention to mix resin and curing agent, realizing resin and curing agent in controlled-release fertilizer production process mixes continuously, mix, facilitate, mixed mixed liquor is sprayed directly into the surface of Controlled Release Fertilizer, after having solved resin and curing agent and mixing due to the curing problem of overlong time, the consumption that has greatly reduced controlled-release fertilizer production thermosetting resin, has reduced production cost.Make capsule for controlled release fertilizer thermosetting resin realize continuity industrialization and produce and be achieved, and provide guarantee for the Stable Release of Controlled Release Fertilizer.
2, device of the present invention is provided with compressed air channel, and compressed air is discharged the mixed liquor accumulating in hybrid chamber completely from hybrid channel, avoids remaining mixed liquor to solidify in hybrid chamber and hybrid channel.
3, compressed air channel of the present invention is relative with mixed liquor passage, is conducive to resin and curing agent fully mixes, and avoids mixed liquor to occur that eddy current causes mixing inhomogeneous and mixedly appears dead angle phenomenon.
4, method technique of the present invention is simple, resin, curing agent, compressed-air actuated discharge pressure are controlled at 0.3 ~ 0.5MPa, for conveying provides power, while preventing that existing middle liquid from mixing, because rate of flow of fluid is crossed the generation of delaying blocking pipe, evenly, the Controlled Release Fertilizer nutrient releasing speed that spraying makes is slow in coating.
5, method of the present invention purges the pressure that pressure is greater than mass transport, has ensured purging effect, avoids material residual.
Brief description of the drawings
Fig. 1 is blender vertical section structure schematic diagram of the present invention;
Fig. 2 is blender top view of the present invention.
Wherein, 1, blender body, 2, helical blade, A, resin channels, B, curing agent passage, C, compressed air channel, D, mixed liquor passage.
Detailed description of the invention
Illustrate technical scheme of the present invention and effect below in conjunction with drawings and Examples, but be not limited to this.
The resin and the curing agent that in embodiment, use are prior art, all can buy in market.
Embodiment 1
A kind of Controlled Release Fertilizer resin and curing agent continuous mixing device, structure is as Fig. 1, shown in Fig. 2, comprise blender body 1, blender body 1 adopts 304 stainless steels, on the end face of one end of blender body 1, be provided with resin inlet and curing agent import, in blender body, be provided with the resin channels A and the curing agent channel B that are communicated with resin inlet and curing agent import, between resin inlet and curing agent import, be provided with compressed air inlet, between resin channels A and curing agent channel B, be provided with the compressed air channel C being communicated with compressed air inlet, be oppositely arranged mixed liquor passage D with compressed air channel C, the center line of the center line of compressed air channel C and mixed liquor passage D point-blank, mixed liquor passage D and resin channels A, between curing agent channel B and compressed air channel C, be provided with the hybrid chamber communicating with 4 passages, the volume of hybrid chamber is 20ml, the exit of mixed liquor passage D is provided with spray head.Spray head is Fan spray head, and the spray orifice size of spray head is 1.0 ~ 2.0mm.
On the inwall of mixed liquor passage D, setting-in is fixed with helical blade, and helical blade runs through whole mixed liquor passage D, and described helical blade is two, be arranged in parallel, and the direction of rotation of two helical blades is contrary.
Make the input of resin and curing agent more smooth and easy, avoid the impulsive force of compressed air channel to affect adding of resin and curing agent, prevent that resin, curing agent from sticking on conduit wall simultaneously.Compressed air channel C, mixed liquor passage D are arranged on the center line of blender body 1, resin channels A, curing agent channel B are symmetricly set on the both sides of compressed air channel C, the outlet of the outlet of resin channels, the outlet of curing agent passage, compressed air channel is connected with hybrid chamber jointly, angle between the center line OA of resin channels A and the center line OC of compressed air channel is 30 °, and the angle between the center line OB of curing agent channel B and the center line OC of compressed air channel is 30 °.
The cross section of resin channels A, curing agent channel B, compressed air channel C, mixed liquor passage D is circular, resin channels A is consistent with the diameter of curing agent channel B, the diameter of compressed air channel C is 25mm, the diameter of resin channels A, curing agent channel B is respectively 4mm, and the diameter of mixed liquor passage D is 6mm.The volume of hybrid chamber is 20ml.
Embodiment 2
Controlled Release Fertilizer resin and curing agent continuous mixing device as described in Example 1, difference is:
The volume of hybrid chamber is 30ml, and the angle between the center line OA of resin channels A and the center line OC of compressed air channel is 45 °, and the angle between the center line OB of curing agent channel B and the center line OC of compressed air channel is 45 °.The diameter of compressed air channel C is 40mm, and the diameter of resin channels A, curing agent channel B is respectively 10mm, and the diameter of mixed liquor passage D is 10mm.
Embodiment 3
Controlled Release Fertilizer resin and curing agent continuous mixing device as described in Example 1, difference is:
The volume of hybrid chamber is 40ml, and the angle between the center line OA of resin channels A and the center line OC of compressed air channel is 55 °, and the angle between the center line OB of curing agent channel B and the center line OC of compressed air channel is 60 °.The diameter of compressed air channel C is 50mm, and the diameter of resin channels A, curing agent channel B is respectively 15mm, and the diameter of mixed liquor passage D is 15mm.
Embodiment 4
The method of utilizing device described in embodiment 1 to mix resin and curing agent, comprises that step is as follows:
1, adjust resin, curing agent, compressed-air actuated discharge pressure, make resin, curing agent, compressed-air actuated discharge pressure be respectively 0.3MPa,
2, resin, curing agent and compressed air enter in hybrid chamber along resin channels, curing agent passage and compressed air channel respectively; The mixed liquor of resin and curing agent enters mixed liquor passage under the promotion of pressure, and the spray head from mixed liquor channel exit after helical blade fully mixes sprays, Controlled Release Fertilizer surface after the mixed liquor of spray head ejection is painted on coating;
3, after spraying finishes, stop the conveying of resin and curing agent, continue compressed air channel to pass into compressed air, keep compressed air to purge 1～3 minute to hybrid chamber, mixed liquor residual in hybrid chamber is discharged;
4, after step 3 finishes, resin channels, curing agent passage are passed into compressed air simultaneously, keep compressed air to purge 2 ~ 5 minutes to resin channels and curing agent passage, respectively resin residual in resin channels, curing agent passage, curing agent are discharged;
5, after step 4 finishes, repeating step 3), until residual mixed liquor is got rid of clean in hybrid chamber.
In above-mentioned steps 3, step 4, compressed-air actuated pressure is 0.5MPa.
In above-mentioned steps 2, mixed liquor is 0.3MP from the pressure of the shower nozzle ejection of mixed liquor channel exit, and the feed flow of mixed liquor is 5-100L/ hour.
Embodiment 5
The method of as described in Example 4 resin and curing agent being mixed, difference is:
Resin, curing agent, compressed-air actuated discharge pressure are respectively 0.5MPa,
In step 3, step 4, compressed-air actuated pressure is 0.8MPa.
In step 2, mixed liquor is 0.5MP from the pressure of the shower nozzle ejection of mixed liquor channel exit, and the feed flow of mixed liquor is 5-100L/ hour.
Experimental example:
By the method that resin and curing agent are mixed described in embodiment 4, condition is with embodiment 4, and its difference is:
Experimental example 1: in step 1, resin, curing agent, compressed-air actuated discharge pressure are respectively 0.1MPa,
Experimental example 2: in step 1, resin, curing agent, compressed-air actuated discharge pressure are respectively 0.2MPa,
Experimental example 3: in step 1, resin, curing agent, compressed-air actuated discharge pressure are respectively 0.3MPa,
Experimental example 4: in step 1, resin, curing agent, compressed-air actuated discharge pressure are respectively 0.4MPa,
Experimental example 5: in step 1, resin, curing agent, compressed-air actuated discharge pressure are respectively 0.5MPa,
Experimental example 6: in step 1, resin, curing agent, compressed-air actuated discharge pressure are respectively 0.6MPa,
Coated fertilizer initial stage release rate after above-mentioned experimental example 1-experimental example 6 spraying process atomizing effect after treatment and spraying is made to a contrast test table (referring to table 1)
Coated fertilizer initial stage release rate, the requirement of GB/T 23348-2009, HG4125-2011 slow release fertilizer, initial stage release rate≤15%.
Table 1: the difference of resin, curing agent, compressed-air actuated discharge pressure, coated fertilizer initial stage release rate Contrast on effect table after corresponding spraying process atomizing effect and spraying
Known by 6 experimental example contrasts in upper table, material (resin, curing agent), compressed-air actuated discharge pressure is higher, the effect of spraying process atomization is better, but coated fertilizer initial stage release rate is imitated recently from spraying, experimental example 1, the coated fertilizer initial stage release rate of experimental example 2 and experimental example 6 all >=15%, after spraying, nutrient release rate is very fast, all do not meet the requirement of slow release fertilizer, in visible all experimental examples, coated fertilizer initial stage release rate after spraying process atomizing effect and spraying, best with experimental example 3-experimental example 3 effects, resin, curing agent, compressed-air actuated discharge pressure is controlled at 0.3 ~ 0.5MPa, be conducive to most spraying, coating evenly, the Controlled Release Fertilizer nutrient releasing speed that spraying makes is slow.
Claims (1)
1. a Controlled Release Fertilizer resin and curing agent continuous mixing device, comprise blender body, on the end face of one end of blender body, be provided with resin inlet and curing agent import, in blender body, be provided with the resin channels and the curing agent passage that are communicated with resin inlet and curing agent import, it is characterized in that: between resin inlet and curing agent import, be provided with compressed air inlet, between resin channels and curing agent passage, be provided with the compressed air channel being communicated with compressed air inlet, be oppositely arranged mixed liquor passage with compressed air channel, the center line of the center line of described compressed air channel and mixed liquor passage point-blank, mixed liquor passage and resin channels, between curing agent passage and compressed air channel, be provided with the hybrid chamber communicating with 4 passages, the exit of mixed liquor passage is provided with spray head, described compressed air channel, mixed liquor channel setting are on the center line of blender body, resin channels, curing agent passage are symmetricly set on the both sides of compressed air channel, the outlet of the outlet of described resin channels, the outlet of curing agent passage, compressed air channel is connected with hybrid chamber jointly, and the angle between the center line of resin channels and the center line of compressed air channel is 30 °～55 °, the volume of described hybrid chamber is 20～40ml, the cross section of described resin channels, curing agent passage, compressed air channel and mixed liquor passage is circular, the diameter of resin channels is consistent with the diameter of curing agent passage, the latus rectum of described compressed air channel is 25～50mm, the latus rectum of resin channels, curing agent passage is respectively 4～15mm, and the latus rectum of described mixed liquor passage is 6～15mm.
2. according to the Controlled Release Fertilizer resin described in claim 1 and curing agent continuous mixing device, it is characterized in that: in mixed liquor passage, be provided with helical blade, helical blade runs through mixed liquor passage, described helical blade is two, be arranged in parallel, and the direction of rotation of two helical blades is contrary.
3. Controlled Release Fertilizer resin according to claim 2 and curing agent continuous mixing device, is characterized in that: described helical blade setting-in is fixed in mixed liquor vias inner walls.
4. according to the Controlled Release Fertilizer resin described in claim 1 and curing agent continuous mixing device, it is characterized in that: described spray head is Fan spray head, hollow cone shower nozzle or solid-cone shower nozzle, and on described spray head, spray orifice is of a size of 1.0 ~ 2.0mm.
5. the method for utilizing device as described in claim 1 to mix resin and curing agent, comprises that step is as follows:
1), adjust resin, curing agent, compressed-air actuated discharge pressure, make resin, curing agent, compressed-air actuated discharge pressure be controlled at 0.3 ~ 0.5MPa, the pressure differential between pressure differential, curing agent discharge pressure and the compressed air delivery pressure between resin transfer pressure and compressed air delivery pressure is all less than 0.02MPa simultaneously;
2), resin, curing agent and compressed air enter in hybrid chamber along resin channels, curing agent passage and compressed air channel respectively; The mixed liquor of resin and curing agent enters mixed liquor passage under the promotion of pressure, and the spray head from mixed liquor channel exit after helical blade fully mixes sprays, Controlled Release Fertilizer surface after the mixed liquor of spray head ejection is painted on coating;
3), after spraying finishes, stop the conveying of resin and curing agent, continue compressed air channel to pass into compressed air, keep compressed air to purge 1～3 minute to hybrid chamber, mixed liquor residual in hybrid chamber is discharged;
4) after step 3) finishes, resin channels, curing agent passage are passed into compressed air simultaneously, keep compressed air to purge 2 ~ 5 minutes to resin channels and curing agent passage, respectively resin residual in resin channels, curing agent passage, curing agent are discharged;
5) after step 4) finishes, repeating step 3), until residual mixed liquor is got rid of clean in hybrid chamber.
6. the method for as described in claim 5, resin and curing agent being mixed, is characterized in that: in described step 3), step 4), compressed-air actuated pressure is 0.5 ~ 0.8MPa.
7. the method for as described in claim 5, resin and curing agent being mixed, is characterized in that: step 2) in mixed liquor be 0.3～0.5MP from the pressure of the shower nozzle ejection of mixed liquor channel exit, the feed flow of mixed liquor is 5-100L/ hour.
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| CN105945218B (en) * | 2016-06-27 | 2018-04-24 | 苏州欣苏诚铸造机械有限公司 | Micro liquid material mixer for sand mixer |
| CN115487701B (en) * | 2022-10-27 | 2023-06-27 | 重庆市智翔铺道技术工程有限公司 | Reactive double-sizing centralized mixer |
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| CN201756467U (en) * | 2010-05-20 | 2011-03-09 | 新乡市大成环保设备有限公司 | Jet flow swirling aerator |
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| US5979787A (en) * | 1997-12-13 | 1999-11-09 | Usbi Co. | Apparatus and method for convergently applying polymer foam to substrate |
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| KR101107671B1 (en) * | 2011-10-18 | 2012-01-25 | 한국종합철관 (주) | Coating device for two-pack polyurethane |
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| US6663021B1 (en) * | 1999-09-10 | 2003-12-16 | Usbi Co. | Portable convergent spray gun capable of being hand-held |
| CN201756467U (en) * | 2010-05-20 | 2011-03-09 | 新乡市大成环保设备有限公司 | Jet flow swirling aerator |
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Address after: 276700 Linyi Province, Linshu County, Xing County, West Street, No. 19 Applicant after: KINGENTA ECOLOGICAL ENGINEERING GROUP CO., LTD. Address before: 276700 Linyi Province, Linshu County, Xing County, West Street, No. 19 Applicant before: Shandong Kingenta Bio-engineering Stock Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: SHANDONG KINGENTA BIO-ENGINEERING STOCK CO., LTD. TO: KINGENTA ECOLOGICALENGINEERING GROUP CO., LTD. |
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