CN1975303A - Dithane M-22 Z-78 closed loop circulating drying method and apparatus - Google Patents
Dithane M-22 Z-78 closed loop circulating drying method and apparatus Download PDFInfo
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- CN1975303A CN1975303A CNA2006101561899A CN200610156189A CN1975303A CN 1975303 A CN1975303 A CN 1975303A CN A2006101561899 A CNA2006101561899 A CN A2006101561899A CN 200610156189 A CN200610156189 A CN 200610156189A CN 1975303 A CN1975303 A CN 1975303A
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
Drying methods of mancozeb closed cycle, the mancozeb was sent into the dryer, take heat and mass exchange with 140 degree C to 250 degree C nitrogen gas or carbon dioxide, separate in the cyclone separator and bag filter, dry goods was sent into cooler and unloaded after cooled to room temperature, the off-gas heat was recycled by recoverer, sent to the heater. Its installations comprises the dryer, cyclone separator, waste heat recoverer, the fan, spraying tower, heater and dry goods cooler, the air outlet was connected with the air inlet of the cyclone separator, its air outlet was connected with the hot end air inlet of the waste heat recoverer, the hot end air outlet was sequentially connected with spraying tower, demister and fan, the air outlet of the fan connects the cold end air inlet of the waste heat recoverer, the cold end air outlet of the waste heat recoverer connects the air inlet of dryer by the heater, the discharging mouth of cyclone separator links the dry goods cooler, which has discharge gate on it, the heater was set with heat medium inlet and outlet, the spraying tower was set with cooling water inlet and water outlet down, the bottom of the demister was also set with water outlet.
Description
Technical field
The present invention relates to a kind of Mancozeb drying means and equipment, relating in particular to a kind of is the Mancozeb closed cycle drying method and the drying device of cyclic drying medium with nitrogen or carbon dioxide.
Background technology
The former medicine exposed to air of Mancozeb and make moist very easily decomposition, oxidation, even can burn, explode.And it also contains the weak crystallization water of part, and dry difficulty is bigger.
At present, Mancozeb manufacturing enterprise generally adopts vacuum bipyramid drying.When dry; manually wet stock is sent in the drying machine, closed the charging and discharging mouth after, utilize the water-absorbing type vavuum pump to extract air in the drying machine; reach certain negative pressure; open steam valve, steam enters in the drying machine chuck, and material is carried out indirect, drying; reach the requirement of dry product moisture content after a period of time; steam off is sent into nitrogen dry product is cooled off, and shuts down discharging behind the dry product cool to room temperature.But, from being fed to about 4 hours of total drying time of discharging, a 1.5m
3The about 210kg of the each dry wet feed of vacuum double-cone dryer, the extremely low about 50kg/h of separate unit hourly output, it is more to reach certain production scale equipment needed thereby platform number, floor space is big.This drying belongs to gap operating, and heating is carried out with cooling is staggered in the drying machine, and power and thermal energy consumption are higher, and the thermal efficiency is extremely low.Reinforced, discharging is manually carried out, and operating environment is poor, and labour intensity is big, and material dissipates also big.
The cloth bag deashing needs a large amount of Compressed Gas in the sack cleaner, if this Compressed Gas is an air, oxygen content in then can the increase system, drying to inflammable and explosive Mancozeb is inappropriate, if this Compressed Gas is a nitrogen, requirement is much uneconomical, can adopt the cloth bag circulating fan to use the clean nitrogen of air-purifying chamber that cloth bag is carried out deashing.
The axle envelope of circulating fan is bigger to the oxygen content influence of drying medium in the system, and is higher in this temperature, contain that certain dust, lubricating condition are relatively poor, under the situation that the vibration displacement amount of impeller and axle is bigger, can adopt multistage magnet fluid sealing, to guarantee sealing.
Mancozeb contains the weak crystallization water, baking temperature is higher, gas temperature is greater than 110 ℃ behind the sack cleaner, if directly carry out cool-down dehumidification, not only waste heat, and increased the water consumption of cool-down dehumidification, can adopt the heat pipe type waste-heat recovery device of the big spacing of low wing of easy-to-clean ash to reclaim this heat, and can economize on water, to increase economy, environmental benefit.
Summary of the invention
The invention provides a kind of be applicable to inflammable and explosive Mancozeb drying, handling safety is continuous, labour intensity is low, production efficiency is high, less energy consumption, dissipation are low, effective content decomposition of little, Mancozeb closed cycle drying method and drying device that the unit disposal ability is big.
The present invention adopts following technical scheme:
A kind of is the Mancozeb closed cycle drying method of drying medium with the inert gas, adopt charger that wet Mancozeb is sent in the drying machine, carry out the caloic exchange and obtain drying with 140 ℃～250 ℃ nitrogen or carbon dioxide after the heating, and in cyclone separator and sack cleaner, separate, send into after dry product compiles to be cooled in the cooler and measure, pack after room temperature draws off, with circulating fan dried tail gas is sent into waste heat after waste-heat recoverer reclaims, in heater, heat, so constantly circulation.
A technical scheme of the present invention is a kind of drying device that is used to implement above-mentioned Mancozeb closed cycle drying method, by the enclosed type direct dryer, cyclone separator, the heat pipe-type waste-heat recoverer, circulating fan, spray column, heater and dry product cooler are formed, be provided with charge door at enclosed type direct dryer middle part, in the enclosed type direct dryer, from the Mancozeb of charge door in the enclosed type direct dryer with heating after 140 ℃～250 ℃ nitrogen or carbon dioxide carry out the caloic exchange, the air outlet of enclosed type direct dryer is connected with the import of cyclone separator, the air outlet of cyclone separator is connected with the hot junction air inlet of heat pipe-type waste-heat recoverer, its hot junction air outlet and spray column, demister and circulating fan link to each other successively, the circulating fan air outlet is connected with the cold junction air inlet of heat pipe-type waste-heat recoverer, the cold junction air outlet of heat pipe-type waste-heat recoverer is connected with enclosed type direct dryer air inlet by heater, the discharging opening of cyclone separator links to each other with the dry product cooler, dry product cooler bottom is provided with discharge gate, heater also is provided with the import and the outlet of heating agent, and spray column top is provided with cooling water inlet, bottom and demister bottom are provided with delivery port.
The present invention has also adopted following technical measures, so that further improve correlated performance of the present invention:
The first is used for implementing the sack cleaner of above-mentioned Mancozeb drying device, form by cloth bag circulating fan, reductor, clean room, cleaning door, clean gas outlet, ash-laden gas import, cloth bag, discharging opening, the cloth bag circulating fan links to each other with clean room and rotatable cleaning door by circulating line, and cloth bag places the bottom of clean room.
It two is a kind of heat pipe-type waste-heat recoverers that are used for implementing above-mentioned Mancozeb drying device, is made up of hot cell, cold house, dividing plate, finned heat pipe, and the hot cell places the below, cold house, and finned heat pipe passes dividing plate.
It three is a kind of circulating fans that are used for implementing above-mentioned Mancozeb drying device, form by axle, magnetic fluid, permanent magnet, pole piece, magnetic fluid is positioned at pole piece and between centers, and permanent magnet is positioned between two pole pieces, and in two pole pieces one is close to the blower fan body casing.
Compared with prior art, the present invention has following advantage:
1.1, dry carry out under the oxygen condition in extremely low containing, superior product quality can not produce the danger of oxidation, decomposition, burning and blast.1.2, because closed-circuit operation, no waste gas and dust emission have been avoided the pollution to environment.1.3, adopt the direct contact drying of gas-solid, rate of drying is exceedingly fast, generally in 10 seconds, traditional drying technology needs 3 hours approximately, reduced the decomposition of active ingredient, and single device output can be very big, is specially adapted to large-scale production, have only 50 kilograms as a traditional handicraft single device hour dry amount, single device of the present invention hour dry amount can reach 1000 kilograms.1.4, dry run belongs to continuous type, avoided the traditional drying mode to heat the problem of cooling a little while a little while, heat utilization efficiency improves greatly.1.5, the traditional handicraft charging and discharging are intermittently manual operations, the present invention adopts continuous power feed device, labour intensity is little, the material consumption of loosing is low.
2, the sack cleaner of the present invention's employing, the cloth bag deashing adopts circulation clean nitrogen or carbon dioxide, can guarantee also when the gas make-up amount is few that the drying medium oxygen content is extremely low, less than 2%.
3, the heat pipe-type waste-heat recoverer that adopts of the present invention has reclaimed the waste heat of dried tail gas, and system thermal efficiency is further enhanced, and has reduced the water consumption of dried tail gas cool-down dehumidification.
4, the circulating fan that adopts of the present invention contains dust and has under certain vibration situation at blower fan, and shaft end seal is also better, can guarantee that the oxygen content of system is low.
Description of drawings
Fig. 1 is the structural representation of drying device of the present invention.
Fig. 2 is the sack cleaner structural representation in the drying device of the present invention.
Fig. 3 is the heat pipe-type waste-heat recoverer structural representation in the drying device of the present invention.
Fig. 4 is the circulating fan shaft seal structure schematic diagram in the drying device of the present invention.
The specific embodiment
A kind of is the Mancozeb closed cycle drying method of drying medium with the inert gas, adopt charger that wet Mancozeb is sent in the drying machine, carry out the caloic exchange and obtain drying with 140 ℃～250 ℃ nitrogen or carbon dioxide after the heating, and in cyclone separator and sack cleaner, separate, send into after dry product compiles to be cooled in the cooler and measure after room temperature draws off, packing, with circulating fan dried tail gas is sent into waste heat after waste-heat recoverer reclaims, in heater, heat, so constantly circulation, the temperature of above-mentioned nitrogen or carbon dioxide can be selected 140 ℃, 250 ℃, 165 ℃, 180 ℃ or 240 ℃.
A kind of drying device that is used to implement above-mentioned Mancozeb closed cycle drying method, by enclosed type direct dryer 2, cyclone separator 3, heat pipe-type waste-heat recoverer 5, circulating fan 6, spray column 10, heater 12 and dry product cooler 15 are formed, be provided with charge door 1 at enclosed type direct dryer 2 middle parts, in enclosed type direct dryer 2, from the Mancozeb of charge door 1 in enclosed type direct dryer 2 with heating after 140 ℃～250 ℃ nitrogen or carbon dioxide carry out the caloic exchange, the air outlet of enclosed type direct dryer 2 is connected with the import of cyclone separator 3, the air outlet of cyclone separator 3 is connected with the hot junction air inlet of heat pipe-type waste-heat recoverer 5, its hot junction air outlet and spray column 10, demister 8 and circulating fan 6 link to each other successively, the air outlet of circulating fan 6 is connected with the cold junction air inlet of heat pipe-type waste-heat recoverer 5, the cold junction air outlet of heat pipe-type waste-heat recoverer 5 is connected with enclosed type direct dryer 2 air inlets by heater 12, the discharging opening of cyclone separator 3 links to each other with dry product cooler 15, dry product cooler 15 bottoms are provided with discharge gate 16, heater 12 also is provided with the import 13 of heating agent and exports 11, and spray column 10 tops are provided with cooling water inlet 7, bottom and demister 8 bottoms are provided with delivery port 9.
Present embodiment is provided with sack cleaner 4 between cyclone separator 3 and heat pipe-type waste-heat recoverer 5, the air inlet of sack cleaner 4 is connected with the air outlet of cyclone separator 3, the air outlet of sack cleaner 4 is connected with the hot junction air inlet of heat pipe-type waste-heat recoverer 5, and the discharging opening of sack cleaner 4 links to each other with dry product cooler 15 by auger 14.
Above-mentioned sack cleaner 4, form by cloth bag circulating fan 41, reductor 42, clean room 43, rotatable cleaning door 44, clean gas outlet 45, ash-laden gas import 46, cloth bag 47, discharging opening 48, cloth bag circulating fan 41 links to each other with clean room 43 and rotatable cleaning door 44 by circulating line, and cloth bag 47 places the bottom of clean room 43.Rotatable cleaning door 44 rotates under reductor 42 drives, and cloth bag 47 is carried out deashing, promptly one by one cloth bag 47 is carried out deashing under the situation that is implemented in the normal operation of system.
Above-mentioned heat pipe-type waste-heat recoverer 5 is made up of hot cell 51, cold house 53, dividing plate 52, finned heat pipe 54, and hot cell 51 places 53 belows, cold house, and finned heat pipe 54 passes dividing plate 52, and the cold fluid and hot fluid flow direction is on the contrary with further raising waste heat recovery amount.
Above-mentioned circulating fan 6, its turning cylinder seal feature is to be made up of axle 61, magnetic fluid 62, permanent magnet 63, pole piece 64, Fan casing 65, magnetic fluid 63 is positioned at 61 on pole piece 64 and axle, and permanent magnet 63 is positioned at 64 of two pole pieces, and in two pole pieces 64 one is close to Fan casing 65.Under the ashamed usefulness of permanent magnet 63, form magnetic circuit by pole piece 64 and the good axle 61 of magnetic conductivity, be placed on the magnetic fluid 62 between axle 61 and the pole piece 64, under the magnetic field effect that permanent magnet 63 produces, high concentration, form a liquid " O " RunddichtringO, be used for overcoming the pressure differential at rotating shaft two ends, to realize sealing function.
The course of work of the present invention is as follows:
Wet Mancozeb is sent in the closed type direct dryer 2 through feeding device 1, with be sent to the inert gas that heat pipe-type waste-heat recoverer 5 and heater 12 are heated to uniform temperature respectively by circulating fan 6, in closed type direct dryer 2, carry out strong caloic exchange, the Mancozeb dry product is collected by cyclone separator 3 and sack cleaner 4 respectively, and after sending into dry product cooler 15 and be cooled to room temperature by auger 14, discharge metering by discharge gate 16, packing, the dried tail gas that leaves sack cleaner 4 still contains higher temperature, cold inert gas is given in heat exchange in heat pipe-type waste-heat recoverer 5, to improve heat utilization efficiency, the lower dried tail gas of the big temperature of humidity is through spray column 10 cool-down dehumidifications, and further removes water smoke in demister 8.The magnitude of recruitment of inert gas is by the Control for Oxygen Content in the system, and the addition of wet Mancozeb is by the control of the temperature in the drying machine 2.In sack cleaner 4, cloth bag circulating fan 41 extracts clean nitrogen by circulating line from clean room 43, sprays into the cloth bag 47 from rotatable cleaning door 44, it is carried out deashing handle.In heat pipe-type waste-heat recoverer 5, adopt finned heat pipe 54 that the heat of nitrogen in the hot cell 51 is passed to nitrogen in the cold house 53, thereby reclaimed the waste heat of dried tail gas.In circulating fan 6, utilization is positioned at pole piece 64 and 61 magnetic fluid 62 of axle, the gap that airtight blower fan body casing 65 and rotating shaft are 61 has stoped in the blower fan nitrogen to external leakage, and the magnet loop that magnetic fluid 62 forms by permanent magnet 63 is positioned at 61 on pole piece 64 and axle always.
The process of whole Mancozeb drying of the present invention is continuous, stable, safety, and no waste gas and dust emission have been avoided the pollution to environment.Drying as the Mancozeb of moisture content about 30%, the water content requirement of Mancozeb dry product is less than 1%, 200 ℃ of the temperature of the inert gas of drying machine import, after adopting the present invention, leave about 110 ℃ of the dried tail gas temperature of sack cleaner, in the heat pipe-type waste-heat recoverer, reduce to 70 ℃ after the heat exchange, reclaim heat 722MJ/h, can economize on coal every day 1 ton, economize on water 240 tons, temperature is reduced to 25 ℃ behind the spray column cool-down dehumidification, and heater via is heated to 200 ℃ after adopting circulating fan to send into again to be warming up to 65 ℃ in the heat pipe-type waste-heat recoverer, the thermal efficiency can reach 67%, and effective content is greater than 92% in the dry product.Because adopted the clean nitrogen deashing of the sack cleaner utilization among the present invention, and circulating fan axle head employing magnet fluid sealing, the nitrogen consumption is few.If per hour dry 900 kilograms of Mancozebs, consume about 20 standard cubic meters of nitrogen/time, about 20 tons of water/time, power consumption 140 degree, consume 150 kilograms of standard coals/time.Compare about 1000 yuan of workshop cost saving per ton with former vacuum bipyramid drying system.
Claims (7)
1, a kind of is the Mancozeb closed cycle drying method of drying medium with the inert gas, it is characterized in that adopting charger that wet Mancozeb is sent in the drying machine, carry out the caloic exchange and obtain drying with 140 ℃～250 ℃ nitrogen or carbon dioxide after the heating, and in cyclone separator and sack cleaner, separate, send into after dry product compiles to be cooled in the cooler and measure, pack after room temperature draws off, after with circulating fan dried tail gas being sent into the waste-heat recoverer recovery waste heat, in heater, heat, so constantly circulation.
2, Mancozeb closed cycle drying method according to claim 1, the waste heat that it is characterized in that dried tail gas is introduced into the spray column cool-down dehumidification after waste-heat recoverer reclaims, enter next circulation again.
3, a kind of drying device that is used to implement the described Mancozeb closed cycle drying of claim 1 method, it is characterized in that by enclosed type direct dryer (2), cyclone separator (3), heat pipe-type waste-heat recoverer (5), circulating fan (6), spray column (10), heater (12) and dry product cooler (15) are formed, be provided with charge door (1) at enclosed type direct dryer (2) middle part, in enclosed type direct dryer (2), from the Mancozeb of charge door (1) in enclosed type direct dryer (2) with heating after 140 ℃～250 ℃ nitrogen or carbon dioxide carry out the caloic exchange, the air outlet of enclosed type direct dryer (2) is connected with the import of cyclone separator (3), the air outlet of cyclone separator (3) is connected with the hot junction air inlet of heat pipe-type waste-heat recoverer (5), its hot junction air outlet and spray column (10), demister (8) and circulating fan (6) link to each other successively, the air outlet of circulating fan (6) is connected with the cold junction air inlet of heat pipe-type waste-heat recoverer (5), the cold junction air outlet of heat pipe-type waste-heat recoverer (5) is connected with enclosed type direct dryer (2) air inlet by heater (12), the discharging opening of cyclone separator (3) links to each other with dry product cooler (15), dry product cooler (15) bottom is provided with discharge gate (16), heater (12) also is provided with the import (13) and the outlet (11) of heating agent, and spray column (10) top is provided with cooling water inlet (7), bottom and demister (8) bottom is provided with delivery port (9).
4, drying device according to claim 3, it is characterized in that between cyclone separator (3) and heat pipe-type waste-heat recoverer (5), being provided with sack cleaner (4), the air inlet of sack cleaner (4) is connected with the air outlet of cyclone separator (3), the air outlet of sack cleaner (4) is connected with the hot junction air inlet of heat pipe-type waste-heat recoverer (5), and the discharging opening of sack cleaner (4) links to each other with dry product cooler (15) by auger (14).
5, according to claim 3 or 4 described drying devices, it is characterized in that sack cleaner (4) is made up of cloth bag circulating fan (41), reductor (42), clean room (43), rotatable cleaning door (44), clean gas outlet (45), ash-laden gas import (46), cloth bag (47), discharging opening (48), cloth bag circulating fan (41) links to each other with clean room (43) and rotatable cleaning door (44) by circulating line, cloth bag (47) places the bottom of clean room (43), rotatable cleaning door (44) rotates under reductor (42) drives, and cloth bag (47) is carried out deashing.
6, according to claim 3 or 4 described drying devices, it is characterized in that heat pipe-type waste-heat recoverer (5) is made up of hot cell (51), cold house (53), dividing plate (52), finned heat pipe (54), dividing plate (52) is located between hot cell (51) and cold house (53), hot cell (51) places below, cold house (53), and finned heat pipe (54) passes dividing plate (52) from hot cell (51) and extends in the cold house (53).
7, according to claim 3 or 4 described drying devices, it is characterized in that circulating fan (6) is made up of axle (61), magnetic fluid (62), permanent magnet (63), pole piece (64), magnetic fluid (62) is positioned between pole piece (64) and the axle (61), permanent magnet (63) is positioned between two pole pieces (64), and in two pole pieces (64) one links to each other with Fan casing (65).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101561899A CN1975303A (en) | 2006-12-30 | 2006-12-30 | Dithane M-22 Z-78 closed loop circulating drying method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101561899A CN1975303A (en) | 2006-12-30 | 2006-12-30 | Dithane M-22 Z-78 closed loop circulating drying method and apparatus |
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| CN1975303A true CN1975303A (en) | 2007-06-06 |
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| CNA2006101561899A Pending CN1975303A (en) | 2006-12-30 | 2006-12-30 | Dithane M-22 Z-78 closed loop circulating drying method and apparatus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072634A (en) * | 2010-12-29 | 2011-05-25 | 洁星环保科技投资（上海）有限公司 | Closed circulating drying equipment and drying process for protective gas |
| CN101543681B (en) * | 2009-04-01 | 2011-06-01 | 利民化工股份有限公司 | Method and device for drying complex mancozeb |
| CN103542712A (en) * | 2012-07-17 | 2014-01-29 | 中国科学院工程热物理研究所 | Dry exhaust gas processing system |
| CN103822455A (en) * | 2014-02-21 | 2014-05-28 | 泰山石膏股份有限公司 | Heat recovery system of gypsum board drying exhaust steam filling tower |
| CN106595227A (en) * | 2016-11-28 | 2017-04-26 | 安德里茨（中国）有限公司 | Ammonium chloride drying and cooling system and process |
| CN109200729A (en) * | 2018-11-07 | 2019-01-15 | 广州金鹏环保工程有限公司 | A kind of wet waste-gas heat of Feed Manufacturing unit heat recycles and waste gas circulation treatment process |
| CN111609701A (en) * | 2020-05-07 | 2020-09-01 | 嘉兴久华环保设备科技有限公司 | Closed cycle drying device |
| CN112325273A (en) * | 2020-11-04 | 2021-02-05 | 华北制药股份有限公司 | Gas recycling and heat recycling process and system thereof |
-
2006
- 2006-12-30 CN CNA2006101561899A patent/CN1975303A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101543681B (en) * | 2009-04-01 | 2011-06-01 | 利民化工股份有限公司 | Method and device for drying complex mancozeb |
| CN102072634A (en) * | 2010-12-29 | 2011-05-25 | 洁星环保科技投资（上海）有限公司 | Closed circulating drying equipment and drying process for protective gas |
| CN102072634B (en) * | 2010-12-29 | 2012-07-18 | 洁星环保科技投资（上海）有限公司 | Closed circulating drying equipment and drying process for protective gas |
| CN103542712A (en) * | 2012-07-17 | 2014-01-29 | 中国科学院工程热物理研究所 | Dry exhaust gas processing system |
| CN103822455A (en) * | 2014-02-21 | 2014-05-28 | 泰山石膏股份有限公司 | Heat recovery system of gypsum board drying exhaust steam filling tower |
| CN106595227A (en) * | 2016-11-28 | 2017-04-26 | 安德里茨（中国）有限公司 | Ammonium chloride drying and cooling system and process |
| CN109200729A (en) * | 2018-11-07 | 2019-01-15 | 广州金鹏环保工程有限公司 | A kind of wet waste-gas heat of Feed Manufacturing unit heat recycles and waste gas circulation treatment process |
| CN111609701A (en) * | 2020-05-07 | 2020-09-01 | 嘉兴久华环保设备科技有限公司 | Closed cycle drying device |
| CN112325273A (en) * | 2020-11-04 | 2021-02-05 | 华北制药股份有限公司 | Gas recycling and heat recycling process and system thereof |
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