CN101543681B - Method and device for drying complex mancozeb - Google Patents
Method and device for drying complex mancozeb Download PDFInfo
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- CN101543681B CN101543681B CN2009100300984A CN200910030098A CN101543681B CN 101543681 B CN101543681 B CN 101543681B CN 2009100300984 A CN2009100300984 A CN 2009100300984A CN 200910030098 A CN200910030098 A CN 200910030098A CN 101543681 B CN101543681 B CN 101543681B
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Abstract
The invention discloses a method and a device for drying complex mancozeb. The method for drying complex mancozeb mainly adopts a two-stage drying and closed recirculation air stream pulverization process. Sizing agent undergone complex reaction is atomized after entering an atomizing and drying tower and exchanges thermal mass with hot air; dried sizing agent is collected by a cyclone receiver and a first cloth bag collector, the collected dried sizing agent is temporarily stored after being transferred to a transitional storage bin; the temporarily-stored dried sizing agent is dried after entering a vacuum dried so as to remove sizing agent crystallizing water under high vacuum so that sizing agent with the water content of less than 1 weight percent is obtained; the sizing agent enters a dried sizing agent storage bin; the dried sizing agent in the dried sizing agent storage bin uniformly enters an airflow mill to be milled to obtain complex mancozeb wettable powder, and dried air is led to the inlet of the airflow mill and mixed with the dried sizing agent from the dried sizing agent storage bin for reuse. The invention has the advantages of high complex mancozeb yield, low energy consumption, stable complex mancozeb quality and free from ambient air influence in the sizing agent milling process.
Description
Technical field
The present invention relates to a kind of drying means and device thereof of disinfectant use in agriculture, but particularly a kind of drying means and device thereof of complex state Mancozeb wet-milling.
Background technology
The complex state Mancozeb is the high-end product in the gloomy class disinfectant use in agriculture of generation, have the performance better than common Mancozeb, its product efficacy stability, lasting, no poisoning, but the slurry water content after the complex reaction is big, dry difficulty, the energy consumption height, dry run is bigger to the product quality influence, and the production difficulty is big.
Manufacturing enterprise mainly adopts spray-drying at present, as shown in Figure 2, the slurry that complex reaction is good atomizes in drying tower by nozzle, carry out the caloic exchange with the air after the heating, dry material is reclaimed by whirlwind, cloth bag two-stage trap, but again through airslide disintegrating mill pulverize complex state Mancozeb wet-milling.
The slurry of this technology after because of complex reaction will keep mobile, and moisture content will be controlled at more than 50%, and dry run will consume a large amount of heat energy; And Mancozeb is a heat sensitive material, and is inflammable and explosive, and baking temperature is unsuitable too high; The import of air-flow machine is mixed with surrounding air and enters crushing system, and product causes moisture content to exceed standard because of absorbing water in air part in the crushing process, and then influences the stability of product quality.See that comprehensively this process yields is little, consumption is high, it is bigger influenced by air humidity, product percent of pass is low, has only 80%; When summer, air humidity was big, product moisture content reached more than 2%, can't satisfy requirement of client.Production process also is difficult to control, the main drying fused glass inside, and the condition of high temperature is very easily caught fire, and security incident takes place, and causes the production process cleaning of frequently stopping, and influences stablizing of production system.Labor strength is big.
Summary of the invention
Shortcoming for yielding poorly of solving that prior art exists, energy consumption height, unstable product quality, the invention provides a kind of drying means and device thereof of complex state Mancozeb, have output height, low, the constant product quality of energy consumption, the advantage that crushing process is not influenced by surrounding air.
Technical scheme of the present invention is: a kind of drying means of complex state Mancozeb, easily decompose at Mancozeb, inflammable, explosive, contain the crystallization water, difficult dry at low-temperature condition, high temperature easily catches fire, the characteristics of blast, the main two-stage drying that adopts, sealing and circulating gas flow crushing process method, first order spray-drying: the slurry that complex reaction is good enters atomizing in the spray drying tower, carry out the caloic exchange with the air after the heat exchanger heating, the baking temperature of spray drying tower is 150 ℃, the moisture content of evaporation is by the first air-introduced machine emptying, dried then dry material is collected via the cyclone trap and the first cloth bag trap, so just take away the attached water on aqueous water and material surface with lower temperature, dry back reduces to 5%～6% by the moisture of the dry material that the cyclone trap and the first cloth bag trap are collected, and deposits to the transition feed bin temporarily; Second level vacuum drying then: the dry material that the transition feed bin is deposited temporarily enters the vacuum drier drying, the logical thermal source heating of vacuum drier chuck, the baking temperature of vacuum drier is 110 ℃, vacuum is-0.085MPa～-0.095MPa, be 500Kg/h drying time, under high vacuum, take away the material crystallization water, obtain moisture and enter the dry product feed bin less than the material of 1%wt.Material in the dry product feed bin evenly enters airslide disintegrating mill and clashes by various forms of high speeds, pulverize, classification, but the satisfactory material of fineness with air-flow enter the second cloth bag trap capture complex state Mancozeb wet-milling, the material of being collected by the second cloth bag trap enters finished product bin, and dry gas is introduced the airslide disintegrating mill import through second air-introduced machine and mixed with the dry material that comes out from the dry product feed bin and recycle use.Dry air in the crushing system recycles like this, crushing process and isolate from outer air, and the material moisture after having guaranteed to pulverize is constant, does not also influence the performance of airslide disintegrating mill.
The device that uses in the drying means of described complex state Mancozeb, mainly by spray drying tower, cyclone trap, the first cloth bag trap, first air-introduced machine, Minton dryer, the dry product feed bin, airslide disintegrating mill, the second cloth bag trap, second air-introduced machine, finished product bin is formed, the outlet of spray drying tower is connected with cyclone trap, an outlet of cyclone trap is connected with the first cloth bag trap, another outlet is connected with Minton dryer, the discharging opening of the first cloth bag trap is connected with Minton dryer, Minton dryer is connected with the import of dry product feed bin, the outlet of dry product feed bin is connected with the import of airslide disintegrating mill, the outlet of airslide disintegrating mill is connected with the second cloth bag trap import, the air outlet of the second cloth bag trap is connected with second air-introduced machine, discharging opening is connected with finished product bin, wherein Minton dryer is mainly by the transition feed bin, vacuum drier, vavuum pump is formed, the import of transition feed bin is connected with the discharging opening of the cyclone trap and the first cloth bag trap, the discharging opening of transition feed bin is connected with the charging aperture of vacuum drier, vacuum drier is connected with vavuum pump, can also be provided with condenser between vacuum drier and the vavuum pump.The discharging opening of vacuum drier is connected with the import of dry product feed bin, is provided with rake teeth in the vacuum drier, and vacuum drier is provided with heating jacket outward, the logical thermal source heating of chuck, heat conducts to material by cylinder inboard wall, and material is constantly motion under the rake teeth effect, thermally equivalent.Moisture content constantly evaporates, and is taken away by vacuum, and drying finishes, and material is discharged into the dry product feed bin, and second level vacuum drying is finished.The air outlet of second air-introduced machine is connected with the air inlet of airslide disintegrating mill.Spray drying tower is connected with heat exchanger.
Beneficial effect:
1. adopt the secondary drying method overcome Mancozeb easily decompose, inflammable, explosive, contain the crystallization water, in difficult dry, the shortcoming that high temperature easily catches fire, explodes of low-temperature condition.In first order spray-drying, only take away aqueous water and material surface attached water, good at atomizing effect, can finish very soon in the big spray drying tower of contact area, material moisture can be controlled in about 5%wt, output can improve more than two times, and the main frame temperature also can be controlled relatively low, and safety coefficient greatly improves, but production system even running, production process is easy to control, does not need the frequent cleaning of stopping, and labor strength reduces.Then in the vacuum drying of the second level, baking temperature and greatly reducing drying time under-0.085Mpa vacuum state, energy savings has improved output; Material is at low temperature, and vacuum condition is dry down, and product appearance is bright-colored, has improved suspensibility, and wetability has reduced the effective ingredient decomposition, and product quality has a distinct increment.Drying will very high temperature, the shortcoming of long time under atmospheric pressure state to have overcome the material crystallization water.
2. air-flow crushing process sealing and circulating, the dry gas in the system is recycling, and crushing system and environment are isolated, not influenced by air humidity, and the product water content is effectively controlled, and has improved the product heat storage stability, and product quality before the deadline keeps stable; The emptying of former technology air-introduced machine outlet tail gas includes low amounts of dust, and surrounding environment is had certain influence, and after employing the inventive method, most of tail gas recycles ambient influnence very little.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Fig. 2 is former air-flow drying process with atomizing flow chart.
Fig. 3 is an equipment schematic diagram of the present invention.
The specific embodiment
Below in conjunction with Fig. 1, Fig. 3, the present invention is elaborated:
A kind of drying means of complex state Mancozeb, easily decompose at Mancozeb, inflammable, explosive, contain the crystallization water, difficult dry at low-temperature condition, high temperature easily catches fire, the characteristics of blast, the main two-stage drying that adopts, sealing and circulating gas flow crushing process method, first order spray-drying: the slurry that complex reaction is good leaves in the measuring tank 101, air current spray nozzle 102 is fixed in the middle of the bottom of spray drying tower 1, slurry is regulated by valve 103, at the uniform velocity enter nozzle, under action of high-speed airflow, in tower, atomize, carry out the caloic exchange with the air after heat exchanger 3 heating, the cold air of heat exchanger 3 is introduced by air blast 2, the baking temperature of spray drying tower 1 is 150 ℃, aqueous water is evaporated rapidly, the moisture content of evaporation is by 7 emptyings of first air-introduced machine, dried then dry material is collected via the cyclone trap 4 and the first cloth bag trap 5, so just take away the attached water on aqueous water and material surface with lower temperature, dry back reduces to 5%～6% by the moisture of the dry material that the cyclone trap 4 and the first cloth bag trap 5 are collected, deposit to transition feed bin 6, first order spray-drying is finished temporarily;
As the given 55%wt of slurry moisture content, suppose under the identical device disposal ability: being dried to the required hot blast temperature of water content 1%wt is 180 ℃; Be dried to 150 ℃ of 5% moisture content hot blast temperatures, and the Mancozeb dry product is easy to burning even blast in 180 ℃ of environment, system has buildup that security incident will take place slightly, and a large amount of heat is very uneconomic with the air-introduced machine emptying.Therefore, the first order adopts low temperature drying, and energy consumption reduces half, and output can improve twice.
Carry out second level vacuum drying then: the water content that transition feed bin 6 is deposited temporarily is that 5%wt～6% dry material enters vacuum drier 8 dryings, the sealing feed inlet and outlet, start vavuum pump 9, the logical thermal source heating of vacuum drier 8 chucks, the baking temperature of vacuum drier 8 is 110 ℃, vacuum is-0.085MPa～-0.095MPa, be 500Kg/h drying time, be provided with rake teeth in the vacuum drier 8, the vacuum drier 8 outer heating jackets that are provided with, the logical thermal source heating of chuck, heat conducts to material by cylinder inboard wall, material is constantly motion under the rake teeth effect, thermally equivalent.Moisture content constantly evaporates, and is taken away by vacuum, takes away the material crystallization water under high vacuum, and drying finishes, and obtains moisture and enters dry product feed bin 10 less than the material of 1%wt, and second level vacuum drying is finished.The material crystallization water is in 120 ℃ of ability and feed separation under normal pressure, and under-0.085MPa condition, 80 ℃ promptly separable, and material is dry under the high vacuum anaerobic state, effective ingredient can not decomposed, product heat storage stability height, good fluidity, suspensibility, wetability, appearance color all have bigger lifting, thereby have improved product market competitiveness.Therefore adopt the secondary vacuum drying, cut down the consumption of energy, shorten drying time, improved product quality.Material moisture content after above redrying can be controlled in below 1%, effective component content, and suspensibility, pH value, wetability are all qualified, and fineness accounts for 90% 10 microns following qualification rates.
Material in the dry product feed bin 10 is evenly sucked airslide disintegrating mill 11 by negative pressure, in the air-flow pulverizing chamber, by clashing at a high speed with various forms with high velocity air from air supply system, material is pulverized, classification, but the satisfactory material of fineness by grading wheel with air-flow enter the second cloth bag trap 12 capture complex state Mancozeb wet-milling, the material of being collected by the second cloth bag trap 12 enters finished product bin 14, and dry gas is introduced airslide disintegrating mills 11 imports through second air-introduced machine 13 and mixed with the dry material that comes out from dry product feed bin 10 and recycle use.The import that such design has overcome the airslide disintegrating mill that present most of enterprise adopted design communicates with surrounding air, work by air-introduced machine, produce high velocity air in the airslide disintegrating mill import, at the uniform velocity bring material into airslide disintegrating mill, tail gas enters in the atmosphere by air-introduced machine, whole crushing process is open, and material can absorb airborne moisture content, the shortcoming that product moisture content raises and increases with air humidity.For example, a cover LHC-600 airflow comminution system, ability 1000KG/H needs general gas flow 3000m
3/ h, the consumption dry gas 1200m of system
3/ h, consumption surrounding air 1800m
3/ h, summer, air was moisture about 0.58 gram/cubic meter, every pulverizing 1000KG product, the moisture content maximum of being brought into by air is 1.16KG, facts have proved: summer complex state Mancozeb product, even dry run moisture content is controlled at 1.0%, through behind the crushing system, moisture content rises to more than 2.0% to I haven't seen you for ages, can't satisfy the demand of international market.And adopt sealing and circulating method of the present invention, and just the dry air after the usefulness dehumidifying is with intrasystem gas displacement before start, and course of work dry gas recycles, the moisture content of product is just very stable, be not subjected to the influence of environment, production run is steady, can meet the need of market fully.Dry air in the crushing system recycles like this, crushing process and isolate from outer air, and the material moisture after having guaranteed to pulverize is constant, does not also influence the performance of airslide disintegrating mill 11.
The device that uses in the drying means of described complex state Mancozeb, mainly by spray drying tower 1, cyclone trap 4, the first cloth bag trap 5, first air-introduced machine 7, Minton dryer, dry product feed bin 10, airslide disintegrating mill 11, the second cloth bag trap 12, second air-introduced machine 13, finished product bin 14 is formed, the outlet of spray drying tower 1 is connected with cyclone trap 4, an outlet of cyclone trap 4 is connected with the first cloth bag trap 5, another outlet be connected with Minton dryer, the discharging opening of the first cloth bag trap 5 is connected with Minton dryer, Minton dryer is connected with the import of dry product feed bin 10, the outlet of dry product feed bin 10 is connected with the import of airslide disintegrating mill 11,12 imports are connected with the second cloth bag trap in the outlet of airslide disintegrating mill 11, the air outlet of the second cloth bag trap 12 is connected with second air-introduced machine 13, discharging opening is connected with finished product bin 14, wherein Minton dryer is mainly by transition feed bin 6, vacuum drier 8, vavuum pump 9 is formed, the import of transition feed bin 6 is connected with the discharging opening of the cyclone trap 4 and the first cloth bag trap 5, the discharging opening of transition feed bin 6 is connected with the charging aperture of vacuum drier 8, vacuum drier 8 is connected with vavuum pump 9, can also be provided with condenser between vacuum drier 8 and the vavuum pump 9.The discharging opening of vacuum drier 8 is connected with the import of dry product feed bin 10, is provided with rake teeth in the vacuum drier 8, the vacuum drier 8 outer heating jackets that are provided with, the logical thermal source heating of chuck, heat conducts to material by cylinder inboard wall, and material is constantly motion under the rake teeth effect, thermally equivalent.Moisture content constantly evaporates, and is taken away by vacuum, and drying finishes, and material is discharged into dry product feed bin 10, and second level vacuum drying is finished.The air outlet of second air-introduced machine 13 is connected with the air inlet of airslide disintegrating mill 11.Spray drying tower 1 is connected with heat exchanger 3.
Claims (6)
1. the drying means of a complex state Mancozeb, the slurry that complex reaction is good enters atomizing in the spray drying tower (1), carry out the caloic exchange with the air after the heating, dried then dry material is collected via the cyclone trap (4) and the first cloth bag trap (5), again through airslide disintegrating mill (11) pulverize via the second cloth bag trap (12) but capture complex state Mancozeb wet-milling, it is characterized in that, the baking temperature of spray drying tower (1) is 150 ℃, dry back reduces to 5%～6% by the moisture of the dry material that the cyclone trap (4) and the first cloth bag trap (5) are collected, dry material enters vacuum drier (8) drying then, the baking temperature of vacuum drier (8) is 110 ℃, vacuum is-0.085MPa～-0.095MPa, be 500Kg/h drying time, obtain moisture and enter dry product feed bin (10) less than the material of 1%wt, the material of being collected by the second cloth bag trap (12) enters finished product bin (14), and dry gas is introduced airslide disintegrating mill (11) import through second air-introduced machine (13) and recycled use.
2. the device that uses in the drying means of complex state Mancozeb as claimed in claim 1, mainly by spray drying tower (1), cyclone trap (4), the first cloth bag trap (5), first air-introduced machine (7), Minton dryer, dry product feed bin (10), airslide disintegrating mill (11), the second cloth bag trap (12), second air-introduced machine (13), finished product bin (14) is formed, the outlet of spray drying tower (1) is connected with cyclone trap (4), an outlet of cyclone trap (4) is connected with the first cloth bag trap (5), another outlet is connected with Minton dryer, the discharging opening of the first cloth bag trap (5) is connected with Minton dryer, Minton dryer is connected with the import of dry product feed bin (10), the outlet of dry product feed bin (10) is connected with the import of airslide disintegrating mill (11), the outlet of airslide disintegrating mill (11) is connected with second cloth bag trap (12) import, the air outlet of the second cloth bag trap (12) is connected with second air-introduced machine (13), discharging opening is connected with finished product bin (14), it is characterized in that, Minton dryer is mainly by transition feed bin (6), vacuum drier (8), vavuum pump (9) is formed, the import of transition feed bin (6) is connected with the discharging opening of the cyclone trap (4) and the first cloth bag trap (5), the discharging opening of transition feed bin (6) is connected with the charging aperture of vacuum drier (8), vacuum drier (8) is connected with vavuum pump (9), the discharging opening of vacuum drier (8) is connected with the import of dry product feed bin (10), and the air outlet of second air-introduced machine (13) is connected with the air inlet of airslide disintegrating mill (11).
3. the device that uses in the drying means of complex state Mancozeb as claimed in claim 2 is characterized in that, vacuum drier is provided with rake teeth in (8).
4. the device that uses in the drying means of complex state Mancozeb as claimed in claim 2 is characterized in that, spray drying tower (1) is connected with heat exchanger (3).
5. the device that uses in the drying means of complex state Mancozeb as claimed in claim 2 is characterized in that, is provided with condenser between vacuum drier (8) and the vavuum pump (9).
6. the device that uses in the drying means of complex state Mancozeb as claimed in claim 2 is characterized in that, the outer heating jacket that is provided with of vacuum drier (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100300984A CN101543681B (en) | 2009-04-01 | 2009-04-01 | Method and device for drying complex mancozeb |
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| CN2009100300984A CN101543681B (en) | 2009-04-01 | 2009-04-01 | Method and device for drying complex mancozeb |
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| CN101543681B true CN101543681B (en) | 2011-06-01 |
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| CN105387689B (en) * | 2014-09-09 | 2019-02-22 | 航天长征化学工程股份有限公司 | Vacuum lignite drying device and using method thereof |
| CN112516611A (en) * | 2019-09-17 | 2021-03-19 | 江苏瑞强干燥工程有限公司 | Airflow spray type dryer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5215670A (en) * | 1990-02-26 | 1993-06-01 | Bio Gro Systems, Inc. | Process of drying and pelletizing sludge in indirect dryer having recycled sweep air |
| CN1975303A (en) * | 2006-12-30 | 2007-06-06 | 东南大学 | Dithane M-22 Z-78 closed loop circulating drying method and apparatus |
| CN101349497A (en) * | 2008-09-01 | 2009-01-21 | 何润岚 | High-efficiency energy-saving drying apparatus |
-
2009
- 2009-04-01 CN CN2009100300984A patent/CN101543681B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5215670A (en) * | 1990-02-26 | 1993-06-01 | Bio Gro Systems, Inc. | Process of drying and pelletizing sludge in indirect dryer having recycled sweep air |
| CN1975303A (en) * | 2006-12-30 | 2007-06-06 | 东南大学 | Dithane M-22 Z-78 closed loop circulating drying method and apparatus |
| CN101349497A (en) * | 2008-09-01 | 2009-01-21 | 何润岚 | High-efficiency energy-saving drying apparatus |
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Effective date of registration: 20200120 Address after: 221400 Xinyi Economic Development Zone, Jiangsu, Xuzhou Patentee after: Limin Chemical Co., Ltd. Address before: 221400 Limin building, middle of Xinyi, Jiangsu, Xinhua Road Patentee before: Limin Chemical Co., Ltd. |
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