CN106166396A - 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
CN106166396A
CN106166396A CN201610550662.5A CN201610550662A CN106166396A CN 106166396 A CN106166396 A CN 106166396A CN 201610550662 A CN201610550662 A CN 201610550662A CN 106166396 A CN106166396 A CN 106166396A
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China
Prior art keywords
circulating line
vaporizer
spray drying
mixed vapour
heat exchanger
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Application number
CN201610550662.5A
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Chinese (zh)
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CN106166396B (en
Inventor
白建波
蒋建军
曹飞
朱瑶俊
李华锋
罗朋
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Changzhou Suncheer Drying Equipment Co., Ltd.
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Changzhou Faster Energy Science And Technology LLC
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/16Evaporating by spraying
    • B01D1/18Evaporating by spraying to obtain dry solids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/0082Regulation; Control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/30Accessories for evaporators ; Constructional details thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D5/00Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0003Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D5/00Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033Other features
    • B01D5/0036Multiple-effect condensation; Fractional condensation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D5/00Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033Other features
    • B01D5/0039Recuperation of heat, e.g. use of heat pump(s), compression
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D5/00Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/006Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D5/00Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/0069Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with degasification or deaeration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D5/00Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/0072Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with filtration

Abstract

The invention discloses a kind of energy-saving closed cycle spray drying system, system includes: vacuum pump, degassing tank, filter, nebulizer, gas content detector, spray drying tower, cyclone separator, air-introduced machine, refrigerant circulation loop, heat exchanger, nitrogen supplementary device and electric heater etc..Drying tower can be discharged the heat of steam and be carried out recycling by the present invention, the organic solution in steam is carried out recycling simultaneously.Closed circuit circulatory system uses high temperature nitrogen as dry gas, can effectively improve product quality, and avoid product in process of production oxidized.

Description

A kind of energy-saving closed cycle spray drying system
Technical field
The present invention relates to the closed cycle spray drying system of a kind of efficient energy-saving, be particularly well-suited to organic solution slurry, Belong to technical field of drying.
Background technology
Spray drying technology is La Mont and Percy et al. invention in 19 end of the centurys.This skill of development due to food industry Art is initially applied to the manufacture of skimmed milk powder, is applied to the food industry such as dairy industry, solid beverage, solid seasoning later, The most commonly used in detergent industry, pharmaceuticals industry and the industry such as pottery, environmental protection.Nowadays you pass through constantly this technology Improving and innovation, it is auxiliary with dry that this technology is also applied to different liquids characteristic (such as concentration, viscosity, surface tension etc.) equipment development The exploitation of auxiliary agent.
Slurry is dispersed into vaporific microgranule to increase moisture evaporation surface by the effect of mechanical force by spray dryer, adds Fast dry run, after mist particles contact with high temperature air, the moisture of wherein most is removed, dry of generation simultaneously Granule product, substantially increases production efficiency.But owing to this process water evaporation quantity is huge, produce a large amount of energy expenditure.With hard As a example by alloy compound produces, wherein with ethanol as solvent, slurry is in spray tower after row hot and humid area, and the steam of generation is About 94 DEG C, although be not high temperature, but if these heats being carried out recycling can be substantially reduced energy expenditure, and Recycling to spirit solvent, is the mixture of solid and organic solution owing to making carbide alloy mixture, therefore have must Develop a kind of novel closed cycle spray drying system.
Summary of the invention
The invention discloses a kind of closed cycle spray drying system, the heat that drying tower can be discharged steam is carried out back Receive recycling, the organic solution in steam is carried out recycling simultaneously.Closed circuit circulatory system uses high temperature nitrogen as dry Dryness body, can effectively improve product quality, and avoid product in process of production oxidized.
A kind of energy-saving closed cycle spray drying system, described system includes vacuum pump, degassing tank, filter, atomization Device, spray drying tower, cyclone separator;Organic solution slurry enters degassing tank by vacuum pump effect, subsequently into filter Filter, entered the nebulizer of spray drying tower after filtration by vacuum pump effect, by through electrical heating in spray drying tower Hot blast gas be dried, dried granule and mixed vapour enter cyclone separator, and the product after separation passes through whirlwind Separator bottom flows out;It is characterized in that: described system also includes that circulating line one, circulating line two and refrigerant cycle are returned Road;
Described circulating line one includes pressure fan, vaporizer, heat exchanger;
Described circulating line two includes vaporizer, heat exchanger, nitrogen supplementary device, electric heater;
Described refrigerant circulation loop includes vaporizer, compressor, condenser and throttling arrangement;
Described circulating line one, circulating line two and refrigerant circulation loop share vaporizer, described circulating line one and circulation Pipeline two shares heat exchanger;
The mixed vapour of described cyclone separator enters circulating line for the moment by air-introduced machine, and mixed vapour passes through air-introduced machine effect Sequentially enter pressure fan, heat exchanger finally enters vaporizer, is entering the mixed vapour before vaporizer after heat exchange Become time mixed vapour;
When the mixed vapour of described cyclone separator enters circulating line two by air-introduced machine, secondary with circulating line one mixes steaming Vapour converges commonly through vaporizer, subsequently into refrigerant circulation loop, passes sequentially through compressor, condenser and throttling arrangement, Eventually passing back to vaporizer, vaporizer, by the organic solution condensation in mixed vapour and time mixed vapour, then reclaims, cooling After gas carry out heat exchange by the mixed vapour in heat exchanger, with circulating line one again, preheat, subsequently into electricity Heater, adds nitrogen supplementary device in electric heater front end, and last preheating gas is connected to spray by electric heater after being heated Mist 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 simultaneously Reclaiming the organic solvent mechanical considerations in working steam, the response rate of organic solvent more than 90%, is efficiently reduced by device The organic steam pollution to environment.In order to the nitrogen content in guarantee system is sufficient, add nitrogen supplementary device wherein, In spray drying tower, it is provided with gas content detector simultaneously, when oxygen content exceedes setting value in system, controls nitrogen Supplementary device supplements through row nitrogen in system, so preferably safeguards system can be in hypoxia, it is ensured that product chemistry Character is constant.
Beneficial effects of the present invention:
1, system application nitrogen is as heat cycles gas, keeps hypoxia, emulation product in dry run in making system Oxidized, it is ensured that the quality of product.Add nitrogen supplementary device and gas content detector in system, ensure in real time be Oxygen in system is in low concentration state.
2, system adds coolant circulation circuit, cools down the mixed vapour produced in dry run, makes mixing steam Organic steam condensation in vapour, and to organic solvent through row recycling, wherein the response rate can reach more than 90%, it is to avoid Organic mixed vapour pollution to environment.
3, system adds heat exchanger, the heat in working steam is reclaimed, by the waste heat that is recovered to cooling Heat cycles gas preheats, and so can be substantially reduced energy consumption, adds system entirety output efficiency.
4, system is closed circuit circulatory system, and keeps slight positive pressure state in system, has been effectively isolated outside air entrance In system.
Accompanying drawing explanation
Fig. 1 is the overall system architecture flow chart of the present invention.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the application, real below in conjunction with the application Execute the accompanying drawing in example, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described enforcement Example is only some embodiments of the present application rather than whole embodiments.Based on the embodiment in the application, this area is common The every other embodiment that technical staff is obtained under not making creative work premise, all should belong to the application protection Scope.
As it is shown in figure 1, a kind of energy-saving closed cycle spray drying system, system includes vacuum pump, degassing tank, filtration Device, nebulizer, spray drying tower, cyclone separator;Organic solution slurry enters degassing tank by vacuum pump effect, subsequently into Filter filters, and is entered the nebulizer of spray drying tower after filtration by vacuum pump effect, by passing through in spray drying tower Electrically heated hot blast gas is dried, and dried granule enters cyclone separator with mixed vapour, and the product after separation leads to Cross whirlwind separator bottom to flow out;System also includes circulating line one, circulating line two and refrigerant circulation loop;
Circulating line one includes pressure fan, vaporizer, heat exchanger;
Circulating line two includes vaporizer, heat exchanger, nitrogen supplementary device, electric heater;
Refrigerant circulation loop includes vaporizer, compressor, condenser and throttling arrangement;
Circulating line one, circulating line two and refrigerant circulation loop share vaporizer, circulating line one and circulating line two altogether Use heat exchanger;
The mixed vapour of cyclone separator enters circulating line for the moment by air-introduced machine, and mixed vapour is by air-introduced machine effect successively Enter pressure fan, heat exchanger finally enters vaporizer, and the mixed vapour before entering vaporizer becomes after heat exchange Secondary mixed vapour;
When the mixed vapour of cyclone separator enters circulating line two by air-introduced machine, converge with the secondary mixed vapour of circulating line one Close commonly through vaporizer, subsequently into refrigerant circulation loop, pass sequentially through compressor, condenser and throttling arrangement, finally Returning to vaporizer, vaporizer, by the organic solution condensation in mixed vapour and time mixed vapour, then reclaims, after cooling Gas carries out heat exchange by the mixed vapour in heat exchanger, with circulating line one again, preheats, subsequently into electrical heating Device, adds nitrogen supplementary device in electric heater front end, and last preheating gas is connected to spray dried after being heated by electric heater Dry tower.
Oxygen content detector is set in above-mentioned spray drying tower.
Embodiment:
Carbide alloy mixture using ethanol as solvent is dried.First slurry is improved power by vacuum pump Send into degassing tank, the air in slurry is separated, be then fed into filter and slurry is filtered through row.By vacuum pump to slurry Material pressurizes, and sends into the nebulizer being positioned in spray drying tower and is atomized through row, owing to being filled with high temperature nitrogen in spray drying tower, Therefore vaporific slurry and working steam carry out contact heat exchange so that slurry wink-dry, form granular product and produce mixed simultaneously Close steam.Product enters cyclone separator along with working gas, and carbide alloy mixture grain products is bottom cyclone separator Discharging, mixed vapour enters circulating line one and circulating line two by air-introduced machine, and the mixed vapour entering circulating line two leads to Cold-producing medium in refrigerant circulation loop is heated by pervaporation device, and owing to steam is cooled, wherein organic solute steam is cold By pipe outlet outflow system after Ning, being used for recycling, remaining cooling low temperature nitrogen is preheated by heat exchanger, Achieve the utilization to the heat in hybrid working steam in circulating line one, reduce energy expenditure.Work gas after preheating Body is heated in high-temperature gas subsystem again by electric heater and is dried material.When system exceeds standard with middle oxygen content Time, gas content device detects that oxygen content exceeds standard, and by sending instructions to nitrogen supplementary device, it is achieved to nitrogen in system Supplementing of gas, it is ensured that system is in hypoxia.
This closed cycle spray drying system scope of application: 1. material liquid is made up of solid and organic solvent;2. require have Machine solvent all reclaims;3. poisonous solid, powdery product it is dried;The most do not allow abnormal smells from the patient, solvent vapo(u)r and particulate material ease (prevent from environment, air are polluted) when going out;5. when dust is likely to be formed explosive mixture in atmosphere;The most organic When solvent has blast and danger of combustion;7. in dry run, when dust does not allows 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 Yuan, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and deformation, these improve and deformation Also should be regarded as protection scope of the present invention.

Claims (2)

1. an energy-saving closed cycle spray drying system, described system include vacuum pump, degassing tank, filter, nebulizer, Spray drying tower, cyclone separator;Organic solution slurry enters degassing tank by vacuum pump effect, subsequently into filter mistake Filter, enters the nebulizer of spray drying tower, by through electrically heated in spray drying tower by vacuum pump effect after filtration Hot blast gas is dried, and dried granule enters cyclone separator with mixed vapour, and the product after separation is divided by whirlwind Flow out bottom device;It is characterized in that: described system also includes circulating line one, circulating line two and refrigerant circulation loop;
Described circulating line one includes pressure fan, vaporizer, heat exchanger;
Described circulating line two includes vaporizer, heat exchanger, nitrogen supplementary device, electric heater;
Described refrigerant circulation loop includes vaporizer, compressor, condenser and throttling arrangement;
Described circulating line one, circulating line two and refrigerant circulation loop share vaporizer, described circulating line one and circulation Pipeline two shares heat exchanger;
The mixed vapour of described cyclone separator enters circulating line for the moment by air-introduced machine, and mixed vapour passes through air-introduced machine effect Sequentially enter pressure fan, heat exchanger finally enters vaporizer, is entering the mixed vapour before vaporizer after heat exchange Become time mixed vapour;
When the mixed vapour of described cyclone separator enters circulating line two by air-introduced machine, secondary with circulating line one mixes steaming Vapour converges commonly through vaporizer, subsequently into refrigerant circulation loop, passes sequentially through compressor, condenser and throttling arrangement, Eventually passing back to vaporizer, vaporizer, by the organic solution condensation in mixed vapour and time mixed vapour, then reclaims, cooling After gas carry out heat exchange by the mixed vapour in heat exchanger, with circulating line one again, preheat, subsequently into electricity Heater, adds nitrogen supplementary device in electric heater front end, and last preheating gas is connected to spray by electric heater after being heated Mist drying tower.
One the most according to claim 1 energy-saving closed cycle spray drying system, it is characterised in that: described spray dried 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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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106390495A (en) * 2016-09-25 2017-02-15 黄卫东 Air energy spraying and drying 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
CN111841047A (en) * 2019-04-26 2020-10-30 宁德时代新能源科技股份有限公司 Negative electrode material production equipment

Citations (4)

* Cited by examiner, † Cited by third party
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
JP2012161731A (en) * 2011-02-07 2012-08-30 Okawara Mfg Co Ltd Concentration system including centrifugal thin film vacuum evaporator, and method of operating the same
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
JP2012161731A (en) * 2011-02-07 2012-08-30 Okawara Mfg Co Ltd Concentration system including centrifugal thin film vacuum evaporator, and method of operating the same
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106390495A (en) * 2016-09-25 2017-02-15 黄卫东 Air energy spraying and drying equipment
CN106390495B (en) * 2016-09-25 2018-06-29 黄卫东 A kind of air energy spray drying device
CN111841047A (en) * 2019-04-26 2020-10-30 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

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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

Applicant after: Changzhou Suncheer Drying Equipment Co., Ltd.

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

Applicant before: Changzhou faster energy science and technology limited liability company

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