CN107940900A - The multilevel drying method and drying device of a kind of potassium fluoride in high activity - Google Patents

The multilevel drying method and drying device of a kind of potassium fluoride in high activity Download PDF

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Publication number
CN107940900A
CN107940900A CN201710948077.5A CN201710948077A CN107940900A CN 107940900 A CN107940900 A CN 107940900A CN 201710948077 A CN201710948077 A CN 201710948077A CN 107940900 A CN107940900 A CN 107940900A
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CN
China
Prior art keywords
level
air
drying
potassium fluoride
bag filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710948077.5A
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Chinese (zh)
Inventor
郑燕萍
陈聪聪
程榕
杨阿三
孙勤
屠美玲
李琰君
贾继宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Kaiyi Chemical Technology Co ltd
Jiang University Of Technology
Original Assignee
Hangzhou Kaiyi Chemical Technology Co ltd
Jiang University Of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Hangzhou Kaiyi Chemical Technology Co ltd, Jiang University Of Technology filed Critical Hangzhou Kaiyi Chemical Technology Co ltd
Priority to CN201710948077.5A priority Critical patent/CN107940900A/en
Publication of CN107940900A publication Critical patent/CN107940900A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure
    • F26B21/002Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06Controlling, e.g. regulating, parameters of gas supply
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10Temperature; Pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005Treatment of dryer exhaust gases
    • F26B25/007Dust filtering; Exhaust dust filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00Drying solid materials or objects by processes involving the application of heat
    • F26B3/02Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/10Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour carrying the materials or objects to be dried with it

Abstract

The invention discloses the multilevel drying method and drying device of a kind of potassium fluoride in high activity, which mainly includes the equipment such as coal-fired hot-blast stove, spray tower, type spiral flow drying machine, bag filter.The drying means that the present invention is combined by using spray drying with cyclone drying, potassium fluoride in high activity is first made using spray drying process, and remove material most of moisture, material separates after dropping to certain moisture content with exhaust gas, and then material is further dried with type spiral flow drying machine using the relatively low fresh hot-air of temperature and requires moisture content.Spray drying and cyclone drying are used in combination the present invention, and heat and power energy consumption can not only be greatly reduced, but also equipment size is small, and required place is small, and cost significantly reduces, and the drying effect of material is more preferable, yield higher.

Description

The multilevel drying method and drying device of a kind of potassium fluoride in high activity
Technical field
The invention belongs to chemical products drying means technical field, and in particular to be done to a kind of multistage of potassium fluoride in high activity Drying method and drying device.
Background technology
Potassium fluoride in high activity is one of most common fluorization agent, small with grain diameter(Particle diameter is at 1.0~15 μm), than Surface area is big(Specific surface area is higher than 1.3 m2/g)The characteristics of.Relative to common potassium fluoride, potassium fluoride in high activity is fluorine-containing organic Active high and low by-product in compound fluorination process, in high yield, low dosage the features such as.Potassium fluoride in high activity is mainly used in Pesticide, efficiently dyestuff, the preparation field of medicine and fine chemical product.
Potassium fluoride in high activity product requirement fine size, heap density are small, and the technology generally used at present is spray drying, but by It is low in the requirement of product moisture content, and product easy to absorb moisture, therefore it is very high only with spray drying, dry tail gas delivery temperature (Not less than 270 DEG C), gas consumption is big, causes drying cost height(The thermal efficiency is low, power consumption is big), equipment investment it is high(System is huge Greatly)The defects of.
The content of the invention
A kind of the defects of the purpose of the present invention is overcoming the prior art, there is provided height that can be reduced energy consumption, improve material yield The multilevel drying method of active potassium fluoride and drying.
The multilevel drying method of a kind of potassium fluoride in high activity, it is characterised in that potassium fluoride aqueous solution is connected by dehvery pump The continuous atomizer for adding spray tower top, obtains potassium fluoride in high activity solution after atomization, potassium fluoride in high activity solution is sprayed by entering One hot-air drying of mist tower, gas are discharged into level-one bag filter from spraying tower bottom and carry out gas solid separation, solid Discharged by level-one Blowing stopper from level-one bag filter bottom, being transported to type spiral flow drying machine progress two level by another strand of hot-air does Dry, dried product is discharged into two level bag filter with gas and carries out gas solid separation, solid product potassium fluoride in high activity The feed screw with cooling device is discharged into from two level bag filter bottom by two level Blowing stopper, is transported in cooling Packed appointed place.
The multilevel drying method of a kind of potassium fluoride in high activity, it is characterised in that two strands of air are respectively to mix sky Gas, one air in mixing air is blasted in coal-fired hot-blast stove by air blower to be heated, then is obtained after the purification of purified room, is mixed Another strand of air in air obtains after being filtered by filter after heat exchanger.
The multilevel drying method of a kind of potassium fluoride in high activity, it is characterised in that into the temperature of the hot-air of spray tower The temperature for spending the hot-air for for 400-600 DEG C, being transported to type spiral flow drying machine is 300-500 DEG C.
The multilevel drying method of a kind of potassium fluoride in high activity, it is characterised in that level-one bag filter, two level cloth Compressed air inlet port and compressed air outlet port are respectively provided with bag dust collector, the pressure come out from two bag filter gas outlets Used after the mixing of contracting air into heat exchanger as heat source.
The multilevel drying method of a kind of potassium fluoride in high activity, it is characterised in that level-one bag filter, two level cloth Dust-removal cloth-bag used in bag dust collector is thermostable fluorine compound cloth bag.
The multi-stage drying device of the potassium fluoride in high activity, it is characterised in that including sequentially connected spray tower, level-one Bag filter, rotary flow desiccator and two level bag filter, are respectively equipped with air inlet, level-one on spray tower and rotary flow desiccator Compressed air inlet and outlet are equipped with bag filter and two level bag filter, are equipped with atomizer in spray tower, dehvery pump is set Put at the top of spray tower and communicated with atomizer, level-one bag filter bottom is equipped with level-one Blowing stopper, two level bag filter Bottom is equipped with two level Blowing stopper, and the outlet of two level Blowing stopper connects feed screw, for product discharge, feed screw and motor Connection controls its work by motor.
The multi-stage drying device of the potassium fluoride in high activity, it is characterised in that further include air blower, coal-fired hot-blast stove, net Change room, heat exchanger and filter, air blower, coal-fired hot-blast stove and clean room to be sequentially connected, filter is connected with heat exchanger, purification Room gas outlet is communicated with heat exchanger gas outlet, and the air of gas outlet is divided into two bursts of gases outflows, wherein one enter spray tower into Gas port, another strand enters rotary flow desiccator air inlet.
The multi-stage drying device of the potassium fluoride in high activity, it is characterised in that level-one bag filter and two level cloth bag remove Compressed air outlet on dirt device connects heat exchanger by pipeline, and compressed air is vented again after being used as the heat source of heat exchanger.
By using above-mentioned technology, compared with prior art, beneficial effects of the present invention are as follows:
1)The drying means that the present invention is combined using spray drying with cyclone drying, first prepares high activity fluorine using spray drying process Change potassium and remove wherein most moisture, material separates after dropping to certain moisture content with exhaust gas, then using fresh hot-air The moisture content for reaching required is further dried with type spiral flow drying machine.
2)This hair enters heat exchanger after will the tail gas of level-one bag filter, the discharge of two level bag filter be merged, and makees The gas after filtering is preheated for heat source, while its heat exchanger uses heat exchange of heat pipe, greatly reduces coal-fired dosage and reaches To the purpose to economize on resources, and two air mixing temperatures can be adjusted flexibly, meet the hot-air needs of different demands.
3)The present invention divides two-way to enter drying system using the coal combustion flue gas after high-efficient purification, is mixed all the way with cold air It is bonded to 400-600 DEG C and enters spray tower, another way, which is mixed with cold air to 300-500 DEG C, enters type spiral flow drying machine, and gas is divided to two Road enters drying system, and material need not be dried to very low moisture content in spray-drying stage, therefore spray tower size can reduce, Delivery temperature can be greatly lowered, and gas consumption is reduced, and drying cost reduces.
4)The present invention recycles fine powder using bag filter, fine Product recycling can not only be improved product yield, And subtracted exhaust gas and discharged and utilize waste gas recovery, meet environmental requirement.
5)The present invention is dried by using two-stage, first prepares potassium fluoride in high activity using spray drying process, and tentatively remove Wherein most moisture, then reach required moisture content in type spiral flow drying machine fully drying with a small amount of fresh hot gas.Due to Material need not be dried to very low moisture content in spray-drying stage, therefore spray tower delivery temperature can be greatly lowered, tolerance It can reduce, the thermal efficiency improves, and spray tower size can be also substantially reduced.Since gas consumption is reduced, power consumption is accordingly reduced, matched somebody with somebody Complete equipment is such as:Coal-fired hot-blast stove, wind turbine etc. reduce, and system investments reduce, and floor space is also reduced, and drying cost substantially reduces.
Brief description of the drawings
Fig. 1 is the process flow chart of the present invention.
In figure:1- air blowers;2- coal-fired hot-blast stoves;3- clean rooms;4- is pumped;5- spray towers;501- atomizers;61- level-ones Bag filter;62- two level bag filters;71- level-one air-introduced machines;72- two-stage air draft machines;8- type spiral flow drying machines;91- level-ones Blowing stopper, 92- two level Blowing stoppers;10- motors;11- feed screws;12- heat exchangers;13- filters.
Embodiment
Embodiment is described in detail with reference to Figure of description, so that advantages and features of the invention can be easier to It is readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
As described in Figure 1, the multi-stage drying device of potassium fluoride in high activity of the invention, including sequentially connected spray tower 5, one Level bag filter 61, rotary flow desiccator 8 and two level bag filter 62, be respectively equipped with spray tower 5 and rotary flow desiccator 8 into Compressed air inlet and outlet are equipped with gas port, level-one bag filter 61 and two level bag filter 62, mist is equipped with spray tower 5 Change device 501, dehvery pump 4 is arranged on the top of spray tower 5 and is communicated with atomizer 501, and 61 bottom of level-one bag filter is equipped with one Level Blowing stopper 91,62 bottom of two level bag filter are equipped with two level Blowing stopper 92, the outlet of two level Blowing stopper 92 connection screw feeding Machine 11, for product discharge, feed screw 11 is connected with motor 10 and controls its work by motor 10;
Further include air blower 1, coal-fired hot-blast stove 2, clean room 3, heat exchanger 12 and filter 13, air blower 1, coal-fired hot-blast stove 2 It is sequentially connected with clean room 3, filter 13 is connected with heat exchanger 12, and 3 gas outlet of clean room is communicated with 12 gas outlet of heat exchanger, is gone out The air of gas port is divided into the outflow of two strands of gases, and wherein one enters 5 air inlet of spray tower, another strand of entrance rotary flow desiccator 8 into Gas port.
In order to which heat recovery, the saving energy is of the invention by level-one bag filter 61 and two level bag filter Compressed air outlet on 62 connects heat exchanger 12 by pipeline, and level-one bag filter 61 in 12 connecting pipe of heat exchanger with setting There is level-one air-introduced machine 71, two level bag filter 62 is equipped with two-stage air draft machine 72, two cloth bags with 12 connecting pipe of heat exchanger Compressed air in deduster is vented again after being used as the heat source of heat exchanger 12.
As shown in the figure, the present invention a kind of potassium fluoride in high activity multilevel drying method, be specially potassium fluoride aqueous solution by Pump 4 is continuously added to the atomizer 501 on 5 top of spray tower, and potassium fluoride in high activity solution, potassium fluoride in high activity solution are obtained after atomization Dried by one hot-air for entering spray tower 5, the temperature into the hot-air of spray tower 5 is 400-600 DEG C, and gas is from spraying 5 bottom of tower is discharged into level-one bag filter 61 and carries out gas solid separation, and solid is by level-one Blowing stopper 91 from level-one bag-type dust 61 bottom of device is discharged, and is transported to type spiral flow drying machine 8 by another strand of hot-air and is carried out secondary drying, is transported to type spiral flow drying machine 8 The temperature of hot-air is 300-500 DEG C, and dried product is discharged into two level bag filter 62 with gas and carries out gas-solid point From solid product potassium fluoride in high activity is discharged into band cooling device by two level Blowing stopper 92 from 62 bottom of two level bag filter Feed screw 11, be transported to appointed place in cooling and packed, two strands of air are respectively mixing air, mixing air In one air blasted in coal-fired hot-blast stove 2 and heat by air blower 1, then purified room 3 purify after obtain, in mixing air Another strand of air obtains after being filtered by filter 13 after heat exchanger 12.
A kind of multilevel drying method of potassium fluoride in high activity of the present invention of embodiment 1, comprises the following steps:Temperature is 90 DEG C, 50% potassium fluoride solution is fed by pump 4 with 2000kg/h, while air is added by the coal that air blower 1 enters in coal-fired hot-blast stove 2 The coal combustion flue gas obtained after heat, then 3 high-efficient purification of purified room is divided into two-way and enters drying system, all the way coal combustion flue gas with By filter 13 filtering after, then through heat exchanger 12 heat exchange after cold air mix to 600 DEG C, with 5853 m3/ h enters spray tower 5, it is dried to entering material of the spray tower 5 after the atomization of atomizer 501 from pump 4(5 size of spray tower for φ 6000 × 6000), dried material enters level-one bag filter 61 with gas, the air discharge temperature that level-one bag filter 61 exports Spend for 200 DEG C;Another way coal combustion flue gas is mixed with cold air to 350 DEG C, with 1622m3/ h enters type spiral flow drying machine 8(Eddy flow The size of drying machine 8 is φ 600 × 2000), to from 61 bottom level-one Blowing stopper 91 of level-one bag filter come out material into Row redrying, 250 DEG C of the air discharge temperature of 8 gas outlet of type spiral flow drying machine, the material come out from type spiral flow drying machine 8 enter two Level bag filter 62 carries out depth dedusting, and entering jacketed by the two level Blowing stopper 92 of 62 bottom of two level bag filter cools down The feed screw 11 of device, under the action of motor 10, product is delivered to packaging ground in feed screw 11 in cooling Point, the air come out from two level bag filter 62 enter heat exchanger 12, and the air after being filtered to filter 13 preheats.
The moisture content of the potassium fluoride in high activity product obtained after testing after the method for the present invention is dried is 0.3%, and product is average 11 μm of granularity, product yield are higher than 99.5%, and annual output reaches 15000 tons.
The foregoing is merely the embodiment of the present invention, is not intended to limit the scope of the invention, every to utilize this hair The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made, is directly or indirectly used in other relevant skills Art field, is included within the scope of the present invention.

Claims (8)

1. a kind of multilevel drying method of potassium fluoride in high activity, it is characterised in that potassium fluoride aqueous solution is by pumping(4)It is continuously added to spray Mist tower(5)The atomizer on top(501), potassium fluoride in high activity solution is obtained after atomization, potassium fluoride in high activity solution is sprayed by entering Mist tower(5)The drying of one hot-air, gas is from spray tower(5)Bottom is discharged into level-one bag filter(61)Carry out gas-solid Separation, solid is by level-one Blowing stopper(91)From level-one bag filter(61)Bottom is discharged, and rotation is transported to by another strand of hot-air Flow drying machine(8)Secondary drying is carried out, dried product is discharged into two level bag filter with gas(62)Carry out gas-solid Separation, solid product potassium fluoride in high activity is by two level Blowing stopper(92)From two level bag filter(62)Bottom is discharged into cold But the feed screw of device(11), it is transported to appointed place in cooling and is packed.
A kind of 2. multilevel drying method of potassium fluoride in high activity according to claim 1, it is characterised in that two strands of air point Not Wei mixing air, one air in mixing air is by air blower(1)Blast coal-fired hot-blast stove(2)Middle heating, then it is purified Room(3)Obtained after purification, another strand of air in mixing air is by filter(13)Through heat exchanger after filtering(12)After obtain.
3. the multilevel drying method of a kind of potassium fluoride in high activity according to claim 1, it is characterised in that into spray tower (5)Hot-air temperature be 400-600 DEG C, be transported to type spiral flow drying machine(8)Hot-air temperature be 300-500 DEG C.
4. the multilevel drying method of a kind of potassium fluoride in high activity according to claim 1, it is characterised in that level-one cloth bag removes Dirt device(61), two level bag filter(62)On be respectively provided with compressed air inlet port and compressed air outlet port, from two cloth bags Enter heat exchanger after the compressed air mixing that deduster gas outlet comes out(12)Used as heat source.
5. the multilevel drying method of a kind of potassium fluoride in high activity according to claim 1, it is characterised in that level-one cloth bag removes Dirt device(61), two level bag filter(62)Dust-removal cloth-bag used is thermostable fluorine compound cloth bag.
6. a kind of multi-stage drying device of potassium fluoride in high activity according to claim 1, it is characterised in that including connecting successively The spray tower connect(5), level-one bag filter(61), rotary flow desiccator(8)And two level bag filter(62), spray tower(5) And rotary flow desiccator(8)On be respectively equipped with air inlet, level-one bag filter(61)With two level bag filter(62)On be all provided with There are compressed air inlet and outlet, spray tower(5)It is interior to be equipped with atomizer(501), dehvery pump(4)It is arranged on spray tower(5)Top and with Atomizer(501)Communicate, level-one bag filter(61)Bottom is equipped with level-one Blowing stopper(91), two level bag filter(62)Bottom Portion is equipped with two level Blowing stopper(92), two level Blowing stopper(92)Outlet connection feed screw(11), it is spiral to send for product discharge Material machine(11)With motor(10)Connection is by motor(10)Control its work.
7. the multi-stage drying device of potassium fluoride in high activity according to claim 6, it is characterised in that further include air blower (1), coal-fired hot-blast stove(2), clean room(3), heat exchanger(12)And filter(13), air blower(1), coal-fired hot-blast stove(2)With Clean room(3)It is sequentially connected, filter(13)With heat exchanger(12)Connection, clean room(3)Gas outlet and heat exchanger(12)Outlet Mouth communicates, and the air of gas outlet is divided into two bursts of gases outflows, and wherein one enters spray tower(5)Air inlet, another strand enters rotation Flash dryer(8)Air inlet.
8. the multi-stage drying device of potassium fluoride in high activity according to claim 6, it is characterised in that level-one bag filter (61)With two level bag filter(62)On compressed air outlet heat exchanger is connected by pipeline(12), in connecting pipe respectively Equipped with level-one air-introduced machine(71)With two-stage air draft machine(72), compressed air is as heat exchanger(12)Heat source use after be vented again.
CN201710948077.5A 2017-10-12 2017-10-12 The multilevel drying method and drying device of a kind of potassium fluoride in high activity Pending CN107940900A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108970156A (en) * 2018-06-08 2018-12-11 覃庆冬 A kind of Pneumatic drying device convenient for feeding and being more energy-saving and environmentally friendly
CN109385246A (en) * 2018-09-25 2019-02-26 佛山市金银河智能装备股份有限公司 A kind of polyurethane adhesive production system and production method

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CN1250869A (en) * 1999-09-29 2000-04-19 清华大学 Energy-saving combined high-elasticity cyclone drier
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CN1887915A (en) * 2006-07-19 2007-01-03 山东天力干燥设备有限公司 Chlorinated polyethylene drying process
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CN102853644A (en) * 2012-09-27 2013-01-02 李严光 Tail gas circulating pneumatic drier
CN102887530A (en) * 2012-10-15 2013-01-23 张军航 Production technique of potassium fluoride
CN105413207A (en) * 2015-12-09 2016-03-23 江苏先锋干燥工程有限公司 Series type mist spray and rotational flow combined drying device
CN106766846A (en) * 2016-11-24 2017-05-31 新奥泛能网络科技股份有限公司 A kind of heat recovery system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1250869A (en) * 1999-09-29 2000-04-19 清华大学 Energy-saving combined high-elasticity cyclone drier
US20050209099A1 (en) * 2002-12-19 2005-09-22 Chickering Donald E Iii Methods and apparatus for making particles using spray dryer and in-line jet mill
CN1887915A (en) * 2006-07-19 2007-01-03 山东天力干燥设备有限公司 Chlorinated polyethylene drying process
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108970156A (en) * 2018-06-08 2018-12-11 覃庆冬 A kind of Pneumatic drying device convenient for feeding and being more energy-saving and environmentally friendly
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CN109385246A (en) * 2018-09-25 2019-02-26 佛山市金银河智能装备股份有限公司 A kind of polyurethane adhesive production system and production method

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