CN106166396B - A kind of energy-saving closed cycle spray drying system - Google Patents

A kind of energy-saving closed cycle spray drying system Download PDF

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Publication number
CN106166396B
CN106166396B CN201610550662.5A CN201610550662A CN106166396B CN 106166396 B CN106166396 B CN 106166396B CN 201610550662 A CN201610550662 A CN 201610550662A CN 106166396 B CN106166396 B CN 106166396B
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Prior art keywords
circulating line
evaporator
spray drying
mixed vapour
heat exchanger
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CN201610550662.5A
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CN106166396A (en
Inventor
白建波
蒋建军
曹飞
朱瑶俊
李华锋
罗朋
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Changzhou Haizheng Pharmaceutical Equipment Co.,Ltd.
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CHANGZHOU SUNCHEER DRYING EQUIPMENT Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/16—Evaporating by spraying
    • B01D1/18—Evaporating by spraying to obtain dry solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/0082—Regulation; Control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/30—Accessories for evaporators ; Constructional details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0036—Multiple-effect condensation; Fractional condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0039—Recuperation of heat, e.g. use of heat pump(s), compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/0069—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with degasification or deaeration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/0072—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with filtration

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Solid Materials (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The invention discloses a kind of energy-saving closed cycle spray drying system, system includes：Vacuum pump, degassing tank, filter, atomizer, gas content detector, spray drying tower, cyclone separator, air-introduced machine, refrigerant circulation loop, heat exchanger, nitrogen supplementary device and electric heater etc..The heat that the present invention can discharge drying tower steam carries out recycling, while carries out recycling to the organic solution in steam.Closed circuit circulatory system as dry gas, can effectively improve product quality using high temperature nitrogen, and avoid in process of production product aoxidized.

Description

A kind of energy-saving closed cycle spray drying system
Technical field
The present invention relates to a kind of energy-efficient closed cycle spray drying system, especially suitable for organic solution slurry, Belong to technical field of drying.
Background technology
Spray drying technology is La Mont and Percy et al. inventions at the end of the 19th century.Due to the development of the food industry skill Art is initially applied to the manufacture of skimmed milk powder, later applied to food industry such as dairy industry, solid beverage, solid seasonings, All it is commonly used in the industry such as detergent industry, pharmaceuticals industry and ceramics, environmental protection at the same time.Nowadays your technology passes through constantly Improve and innovation, the technology are also applied to different liquids characteristic（Such as concentration, viscosity, surface tension）Equipment development and drying are auxiliary The exploitation of auxiliary agent.
Slurry is disperseed to nebulize particulate to increase moisture evaporation surface area by spray dryer by the effect of mechanical force, is added Fast drying process, the moisture of wherein most is removed after mist particles are contacted with high temperature air, while is produced and dried Granule product, substantially increases production efficiency.But since the process water evaporation quantity is huge, produce a large amount of energy expenditures.With hard Exemplified by the production of alloy mixture, wherein using alcohol as solvent, in spray tower after row hot and humid area, the steam of generation is slurry 94 DEG C or so, although not being high temperature, if these heats are carried out recycling can substantially reduce energy expenditure, and Recycling to spirit solvent, is solid and the mixture of organic solution due to making carbide alloy mixture, therefore have must Develop a kind of new closed cycle spray drying system.
The content of the invention
The invention discloses a kind of closed cycle spray drying system, the heat that steam can be discharged to drying tower returns Receive and recycle, while recycling is carried out to the organic solution in steam.Closed circuit circulatory system is using high temperature nitrogen as dry Pathogenic dryness body, can effectively improve product quality, and avoid in process of production product aoxidized.
A kind of energy-saving closed cycle spray drying system, the system comprises vacuum pump, degassing tank, filter, atomization Device, spray drying tower, cyclone separator；Organic solution slurry enters degassing tank by vacuum pumping action, subsequently into filter Filtering, enters the atomizer of spray drying tower, by by electrical heating in spray drying tower by vacuum pumping action after filtering Hot wind gas be dried, dried particle and mixed vapour enter cyclone separator, and the product after separation passes through whirlwind Separator bottom flows out；It is characterized in that：The system also includes circulating line one, circulating line two and refrigerant circulation to return Road；
The circulating line one includes pressure fan, evaporator, heat exchanger；
The circulating line two includes evaporator, heat exchanger, nitrogen supplementary device, electric heater；
The refrigerant circulation loop includes evaporator, compressor, condenser and throttling arrangement；
The circulating line one, circulating line two and refrigerant circulation loop share evaporator, one He of circulating line Circulating line two shares heat exchanger；
The mixed vapour of the cyclone separator enters circulating line for the moment by air-introduced machine, and mixed vapour passes through air-introduced machine Effect sequentially enters pressure fan, heat exchanger finally enters evaporator, and the mixed vapour before evaporator is entered is handed over through overheat Become time mixed vapour after changing；
It is secondary mixed with circulating line one when the mixed vapour of the cyclone separator enters circulating line two by air-introduced machine Close steam to converge commonly through evaporator, subsequently into refrigerant circulation loop, pass sequentially through compressor, condenser and throttling dress To put, eventually pass back to evaporator, the organic solution in mixed vapour and time mixed vapour is condensed, then recycled by evaporator, Gas after cooling carries out heat exchange by the mixed vapour in heat exchanger, with circulating line one again, is preheated, Ran Houjin Enter electric heater, add nitrogen supplementary device in electric heater front end, last preheating gas connect after being heated by electric heater To spray drying tower.
Oxygen content detector is set in above-mentioned spray drying tower.
The present invention uses closed cycle mode, employs nitrogen as heat cycles gas so that system may remain in low Oxygen condition works, and keeps slight positive pressure state to prevent outside air from entering device in simultaneity factor.Pass through refrigeration cycle at the same time Organic solvent mechanical considerations in working steam are recycled, device more than 90%, efficiently reduces the rate of recovery of organic solvent Pollution of the organic steam to environment.In order to which nitrogen content in guarantee system is sufficient, nitrogen supplementary device is added wherein, Gas content detector is provided with spray drying tower at the same time, when oxygen content exceedes setting value in system, controls nitrogen Supplementary device so preferably safeguards system can be in hypoxia, ensure product chemistry to being supplemented in system through row nitrogen Property is constant.
Beneficial effects of the present invention：
1st, system application nitrogen makes to keep hypoxia in system, emulation is in the drying process as heat cycles gas Product is aoxidized, and ensure that the quality of product.Nitrogen supplementary device and gas content detector are added in system, is protected in real time Oxygen in card system is in low concentration state.
2nd, system adds coolant circulation circuit, and the mixed vapour produced in drying process is cooled down, steams mixing Organic steam condensation in vapour, and can be reached by more than 90%, avoided through row recycling, the wherein rate of recovery for organic solvent Pollution of organic mixed vapour to environment.
3rd, heat exchanger is added in system, the heat in working steam is recycled, by the waste heat being recovered to cooling Heat cycles gas is preheated, and can so substantially reduce energy consumption, adds system entirety output efficiency.
4th, system is closed circuit circulatory system, and slight positive pressure state is kept in system, has been effectively isolated outside air entrance In system.
Brief description of the drawings
Fig. 1 is the overall system architecture flow chart of the present invention.
Embodiment
It is in order to make those skilled in the art better understand the technical solutions in the application, real below in conjunction with the application The attached drawing in example is applied, the technical solution in the embodiment of the present application is clearly and completely described, it is clear that described implementation Example is merely a part but not all of the embodiments of the present application.It is common based on the embodiment in the application, this area Technical staff's all other embodiments obtained without making creative work, should all belong to the application protection Scope.
As shown in Figure 1, a kind of energy-saving closed cycle spray drying system, system includes vacuum pump, degassing tank, filtering Device, atomizer, spray drying tower, cyclone separator；Organic solution slurry enters degassing tank by vacuum pumping action, subsequently into Filter filter, after filtering by vacuum pumping action enter spray drying tower atomizer, pass through in spray drying tower by Electrically heated hot wind gas is dried, and dried particle enters cyclone separator with mixed vapour, and the product after separation leads to Cross the outflow of whirlwind separator bottom；System further includes circulating line one, circulating line two and refrigerant circulation loop；
Circulating line one includes pressure fan, evaporator, heat exchanger；
Circulating line two includes evaporator, heat exchanger, nitrogen supplementary device, electric heater；
Refrigerant circulation loop includes evaporator, compressor, condenser and throttling arrangement；
Circulating line one, circulating line two and refrigerant circulation loop share evaporator, circulating line one and circulating line Two share heat exchanger；
The mixed vapour of cyclone separator enters circulating line for the moment by air-introduced machine, and mixed vapour is acted on by air-introduced machine Sequentially enter pressure fan, heat exchanger finally enters evaporator, enter evaporator before mixed vapour after heat exchange Become time mixed vapour；
When the mixed vapour of cyclone separator enters circulating line two by air-introduced machine, secondary with circulating line one mixes steaming Vapour converges commonly through evaporator, subsequently into refrigerant circulation loop, passes sequentially through compressor, condenser and throttling arrangement, Evaporator is eventually passed back to, the organic solution in mixed vapour and time mixed vapour is condensed, then recycled by evaporator, is cooled down Gas afterwards carries out heat exchange by the mixed vapour in heat exchanger, with circulating line one again, is preheated, subsequently into electricity Heater, adds nitrogen supplementary device, last preheating gas are connected to spray after being heated by electric heater in electric heater front end Mist drying tower.
Oxygen content detector is set in above-mentioned spray drying tower.
Embodiment：
Carbide alloy mixture using alcohol as solvent is dried.Slurry is improved by vacuum pump first as shown in the figure Power is sent into degassing tank, and the air in slurry is separated, and is then fed into filter and slurry is filtered through row.Pass through vacuum pump Pressurize to slurry, be sent into be located at spray drying tower in atomizer through row be atomized, due in spray drying tower filled with high temperature Nitrogen, therefore vaporific slurry carries out contact heat exchange with working steam so that slurry wink-dry, forms granular product and produces at the same time Raw mixed vapour.Product enters cyclone separator with working gas, and carbide alloy mixture grain products are from cyclone separator Bottom is discharged, and mixed vapour enters circulating line one and circulating line two by air-introduced machine, and the mixing into circulating line two is steamed Vapour heats the refrigerant in refrigerant circulation loop by evaporator, and since steam is cooled, wherein organic solute steams By pipe outlet outflow system after vapour condensation, for recycling, remaining cooling low temperature nitrogen is carried out by heat exchanger Preheating, realizes the utilization to the heat in circulating line one in hybrid working steam, reduces energy expenditure.Work after preheating Make gas and be heated into high-temperature gas by electric heater material to be dried in subsystem again.When system surpasses with middle oxygen content Timestamp, gas content device detect that oxygen content is exceeded, and by sending instructions to nitrogen supplementary device, realize in system The supplement of nitrogen, ensures that system is in hypoxia.
The closed cycle spray drying system scope of application：1. material liquid is made of solid and organic solvent;2. it is required that have Solvent all recycles;3. dry poisonous solid, powdery product;4. smell, solvent vapo(u)r and particulate material ease are not allowed (prevent from polluting environment, air) when going out;5. dust is likely to form explosive mixture in atmosphere;It is 6. organic When solvent has explosion and danger of combustion;In the drying process, 7. dust does not allow to contact with oxygen.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation Also it should be regarded as protection scope of the present invention.

Claims (2)

1. a kind of energy-saving closed cycle spray drying system, the system comprises vacuum pump, degassing tank, filter, atomizer, Spray drying tower, cyclone separator and refrigerant circulation loop；Organic solution slurry enters degassing tank by vacuum pumping action, so Enter filter afterwards to filter, enter the atomizer of spray drying tower after filtering by vacuum pumping action, lead in spray drying tower Cross and be dried by electrically heated hot wind gas, dried particle enters cyclone separator with mixed vapour, after separation Product is flowed out by cyclone separator bottom；The refrigerant circulation loop includes evaporator, compressor, condenser and throttling dress Put；
It is characterized in that：The system also includes circulating line one, circulating line two；
The circulating line one includes pressure fan, evaporator, heat exchanger；
The circulating line two includes evaporator, heat exchanger, nitrogen supplementary device, electric heater；
The circulating line one, circulating line two and refrigerant circulation loop share evaporator, the circulating line one and circulation Pipeline two shares heat exchanger；
The mixed vapour of the cyclone separator enters circulating line for the moment by air-introduced machine, and mixed vapour is acted on by air-introduced machine Sequentially enter pressure fan, heat exchanger finally enters evaporator, enter evaporator before mixed vapour after heat exchange Become time mixed vapour；
When the mixed vapour of the cyclone separator enters circulating line two by air-introduced machine, secondary with circulating line one mixes steaming Vapour converges commonly through evaporator, subsequently into refrigerant circulation loop, passes sequentially through compressor, condenser and throttling arrangement, Evaporator is eventually passed back to, the organic solution in mixed vapour and time mixed vapour is condensed, then recycled by evaporator, is cooled down Gas afterwards carries out heat exchange by the mixed vapour in heat exchanger, with circulating line one again, is preheated, subsequently into electricity Heater, adds nitrogen supplementary device, last preheating gas are connected to spray after being heated by electric heater in electric heater front end Mist drying tower.
A kind of 2. energy-saving closed cycle spray drying system according to claim 1, it is characterised in that：The spraying is dry Oxygen content detector is set in dry tower.
CN201610550662.5A 2016-07-12 2016-07-12 A kind of energy-saving closed cycle spray drying system Active CN106166396B (en)

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Publication number Priority date Publication date Assignee Title
CN106390495B (en) * 2016-09-25 2018-06-29 黄卫东 A kind of air energy spray drying device
CN109028751A (en) * 2018-09-10 2018-12-18 天津渤海石化有限公司 A kind of refrigerating device for materials
CN111841047B (en) * 2019-04-26 2023-07-14 宁德时代新能源科技股份有限公司 Negative electrode material production equipment
CN110604932A (en) * 2019-09-29 2019-12-24 贵州梅岭电源有限公司 Method for preparing potassium perchlorate powder by using closed-loop circulating spray dryer
CN111039263A (en) * 2020-01-15 2020-04-21 常州领裕干燥工程有限公司 Spray reaction device for preparing insoluble sulfur in closed cycle manner
CN114136079A (en) * 2021-12-06 2022-03-04 伯能技术有限公司 Drying system and drying method

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CN101884847A (en) * 2010-07-15 2010-11-17 常州三全干燥设备有限公司 Drying method of glutamic acid-fermented waste liquid
CN102500116A (en) * 2011-09-29 2012-06-20 无锡市群征干燥设备有限公司 High-efficiency energy-saving closed circulatory spray drying method and drying system
CN104888481A (en) * 2015-04-27 2015-09-09 河海大学常州校区 Waste heat recovery heat pump technology-based energy-efficient spray drying device

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JP5806473B2 (en) * 2011-02-07 2015-11-10 株式会社大川原製作所 Concentrating device provided with centrifugal thin film vacuum evaporator and method of operating the same

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN101884847A (en) * 2010-07-15 2010-11-17 常州三全干燥设备有限公司 Drying method of glutamic acid-fermented waste liquid
CN102500116A (en) * 2011-09-29 2012-06-20 无锡市群征干燥设备有限公司 High-efficiency energy-saving closed circulatory spray drying method and drying system
CN104888481A (en) * 2015-04-27 2015-09-09 河海大学常州校区 Waste heat recovery heat pump technology-based energy-efficient spray drying device

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Effective date of registration: 20170616

Address after: Changzhou Tianning District 213000 in Jiangsu Province, Zheng Lu an Cun Jiao River Industrial Park

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Address before: 213000 innovation center, building 2, Xinbei Science Park, Jiangsu, Changzhou, A432-1

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Patentee after: Changzhou Haizheng Pharmaceutical Equipment Co.,Ltd.

Address before: 213000 Jiaoxi Industrial Park, Sheng'an Village, Zhenglu Town, Tianning District, Changzhou, Jiangsu Province

Patentee before: CHANGZHOU SUNCHEER DRYING EQUIPMENT Co.,Ltd.