CN106823445A - A kind of continuous production Two-way Cycle freezing and crystallizing device - Google Patents
A kind of continuous production Two-way Cycle freezing and crystallizing device Download PDFInfo
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- CN106823445A CN106823445A CN201710239800.2A CN201710239800A CN106823445A CN 106823445 A CN106823445 A CN 106823445A CN 201710239800 A CN201710239800 A CN 201710239800A CN 106823445 A CN106823445 A CN 106823445A
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- heat exchanger
- crystallisation chamber
- cylinder
- discharge duct
- freezing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/02—Crystallisation from solutions
- B01D9/04—Crystallisation from solutions concentrating solutions by removing frozen solvent therefrom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
- B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/16—Purification
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a kind of continuous production Two-way Cycle freezing and crystallizing device.Continuous production Two-way Cycle freezing and crystallizing device of the present invention, including crystallisation chamber, heat exchanger, Matter Transfer pipe, refrigerant circulation pipe, discharge duct.Heat exchanger is setting up and down with crystallisation chamber, and discharge duct is placed in crystallisation chamber bottom, and heat exchanger, crystallisation chamber and discharge duct are located on same axis, and Matter Transfer pipe connection crystallisation chamber and heat exchanger, refrigerant circulation pipe are connected with heat exchanger.Suit truncated cone-shaped guide shell in the cylinder of crystallisation chamber middle part, crystallisation chamber is communicated with inside guide shell.Heat exchanger lower end is provided with trumpet type discharging opening, in the guide shell in the cylinder of insertion crystallisation chamber middle part.The achievable freezing and crystallizing of the present invention is continuously produced, heat exchange efficiency and high cold energy utilization rate, and can effectively solve the blocking of Crystallizer tube Louis, emptying cleaning frequency problem long, simple operation stabilization, improve production efficiency and product quality.
Description
Technical field
The present invention relates to freezing and crystallizing device, and in particular to one kind can be real in the industries such as chlor-alkali, salt manufacturing, wastewater treatment
Existing chemical products quantity-produced Two-way Cycle freezing and crystallizing device.
Background technology
Freezing and crystallizing technology be using soluble compound solubility is greatly reduced under cryogenic the characteristics of, from solution
The technology of middle separation and Extraction target product, cheap with equipment manufacturing cost, energy consumption is relatively low, wide at present the characteristics of easy to operate
It is general to be applied to the fields such as chlor-alkali, salinization and volatile, foul smelling, the Industrial Wastewater Treatment that dangerous gas is distributed.
Existing freezing and crystallizing process units, batch (-type) and continous way can be divided into according to mode of operation.Traditional batch (-type)
Freezing and crystallizing equipment, is mainly made up of freezing heat exchanger, settler and equipment for separating liquid from solid.Feed liquid during operation after precooling enters
Freezing heat exchanger, precipitation product is crystallized after being chilled to target temperature, and being transferred to settler carries out crystal granula sedimentation, leads to again after sedimentation completely
Separation of solid and liquid is crossed to obtain target product and separate mother liquor.Due to using Batch Process, discharge is not smooth, separates out crystal and easily blocks cold
Freeze heat exchanger and pipeline, cause brush tank frequently, the production cycle shortens, and loss of refrigeration capacity is serious.Additionally, it is many using settler quantity,
Floor space is big, is also the subject matter that interval freezing and crystallizing equipment is present.
And the continuous freezing and crystallizing equipment of common outer circulation, although heat exchanger and settler have been carried out it is integrated, reduce
Made moderate progress in floor space and raising production capacity, but outside heat exchanger, the part of unspecial augmentation of heat transfer is set,
Heat transfer efficiency and cooling capacity utilization rate are difficult to improve.Additionally, pipeline is long between heat exchanger and crystallisation chamber, also easily analysed on tube wall
Go out crystal, cause Flow of Goods and Materials difficult, once pipeline and heat exchanger local stoppages are, it is necessary to the emptying cleaning of whole tank, the off-time is long,
Increase energy consumption and cost.
The content of the invention
The present invention is for shortcomings and deficiencies present in existing freezing and crystallizing production equipment, there is provided a kind of continuous production is double to follow
Ring freezing and crystallizing device, bicirculating mode is forced by material and refrigerant, improves crystallizer freezing heat transfer efficiency and refrigerant cold
Utilization rate, further reduces energy consumption.Improving and optimizating by mold structure, solves crystal growth deficiency, overflow simultaneously
The problem for needing whole tank emptying cleaning, stopping production cycle long after fine grain entrainment is excessive in liquid, and heat exchange manifold is blocked, effectively improves
The production efficiency and product quality of continuous freezing and crystallizing.
Continuous production Two-way Cycle freezing and crystallizing device of the present invention, including it is crystallisation chamber, heat exchanger, Matter Transfer pipe, cold
Matchmaker's circulation pipe, discharge duct.Heat exchanger is setting up and down with crystallisation chamber, and discharge duct is placed in crystallisation chamber bottom, heat exchanger, crystallisation chamber and unloads
Expects pipe is located on same axis, and Matter Transfer pipe connection crystallisation chamber and heat exchanger, refrigerant circulation pipe are connected with heat exchanger.
The crystallisation chamber is tubular structure, and middle part is cylinder, up and down respectively short cone.Crystallisation chamber middle part cylinder
Interior suit truncated cone-shaped guide shell, crystallisation chamber is communicated with inside guide shell.Guide shell top edge is engaged with cylinder top edge, cylinder
Body top outer rim is provided with exhaust outlet and overfall.
The discharge duct is the pipe for being arranged on the short cone lower end in crystallisation chamber bottom, discharge duct be provided with slurry outlet,
Eluriate mouth and evacuation port.
The heat exchanger is cylinder-like structure, and cylinder lower end is connected with the short cone in crystallisation chamber top, exchanger base
Trumpet type discharging opening is set, in the truncated cone-shaped guide shell in the cylinder of insertion crystallisation chamber middle part.
The Matter Transfer pipe is placed in the side of crystallisation chamber and heat exchanger, and Matter Transfer pipe upper orifice is straight with heat exchanger top
Connect connected, lower nozzle is connected with the conical sidewall of crystallisation chamber bottom.Matter Transfer pipe middle part straight length and heat exchanger and crystallisation chamber
Axis parallel, charging aperture is set on the straight length of middle part, the bottom of middle part straight length is equipped with Matter Transfer pump.
The refrigerant circulation pipe is placed in the side of heat exchanger, and upper lower nozzle is connected with heat exchanger side wall upper and lower side respectively.On
Refrigerant import and refrigerant exit are respectively equipped with outside lower transverse tubule, refrigerant circulation bottom of the tube is equipped with refrigerant circulation pump.Refrigerant circulation pipe
The outside of middle straight section sets steam jacket, and steam jacket upper end is provided with steam inlet and condensed water discharge outlet.
When continuous production Two-way Cycle freezing and crystallizing device equipment of the present invention is run, material to be frozen is from Matter Transfer pipe
On charging aperture input, material delivers into heat exchanger by Matter Transfer pump by the way of jacking side goes out, and material to be frozen exists
In heat exchanger heat exchange is carried out with low temperature refrigerant.Described low temperature refrigerant is entered by the refrigerant import on refrigerant circulation pipe top
Heat exchanger, refrigerant circulation pump carries out forced circulation by the way of jacking side goes out to refrigerant, and the part refrigerant after heat exchange is by cold
The refrigerant exit discharge that matchmaker's circulation pipe bottom is set returns to freezing unit.Material is gone out by the trumpet type below heat exchanger after freezing
Material mouth enters in crystallisation chamber, and the crystal grain of precipitation is grown into during sedimentation downwards, and clear liquid crosses crystallization indoor location
Be will flow up after truncated cone-shaped guide shell lower edge and flowed out from the overfall on crystallisation chamber top.A part of slurry containing crystal grain
Material circulation pipe is sucked by the circulation port of the short circular cone body sidewall in crystallisation chamber bottom, is mixed with the new feed liquid for entering as crystal seed
Close.Major part crystallization is enriched with and enters in discharge duct in crystallisation chamber bottom, is discharged by slurry outlet, is set on discharge duct and washed in a pan
Washing mouth can screen to the crystallization particle diameter for discharging material.When heat exchange manifold is blocked, steam is passed through refrigerant circulation
The steam inlet on pipe external steam chuck top, condensed water flows out from the condensation-water drain of bottom, while using refrigerant circulation pump
Heat exchanging device takes local heating, makes the crystal of blocking dissolve to dredge pipeline again.
It is of the present invention it is continuous production Two-way Cycle freezing and crystallizing device compared with freezing and crystallizing equipment compared to have it is following
Advantage：
1) forced circulation is carried out using the material and refrigerant in two sets of circulating pumps respectively heat exchanging device, effectively reduces resistance of heat transfer
Power, improves the utilization rate of heat transfer efficiency and refrigerant cold, reduces freezing unit load and energy consumption.
2) heat exchanger is placed directly within by crystallisation chamber top by structure optimization, the feed liquid after cooling can quickly enter crystallization
Room, reduces length of pipe and resistance, reduces the probability that crystallization is separated out on heat exchanger tube, circulation tube wall, extension device operation
Cycle；Truncated cone-shaped guide shell in crystallisation chamber can make the crystallization have the time fully to grow and separated with overflow clear liquid, it is to avoid overflow
Carry substantial amounts of fine grain in liquid secretly, cause follow-up separation of solid and liquid difficult, product quality and yield decline.
3) steam jacket is provided with outside refrigerant circulation pipe, coordinates refrigerant circulation pump, can quickly realize that local heating is dredged
Heat exchange manifold, effectively solves to need overall emptying cleaning after existing equipment heat exchange manifold is blocked, and the off-time is long, energy loss
Big problem.
Brief description of the drawings
Fig. 1 is a kind of structural representation of continuous production Two-way Cycle freezing and crystallizing device.
Description of symbols in figure：
1- crystallisation chamber 2- discharge ducts
3- Matter Transfer pump 4- Matter Transfer pipes
5- refrigerant circulation pipe 6- heat exchangers
7-steam jacket, 8-refrigerant circulation pump
9-trumpet type, 10-guide shell of discharging opening
11-exhaust outlet
Specific embodiment
Nitre technique processed is continuously freezed with reference to Fig. 1 of display Two-way Cycle freezing and crystallizing device basic structure and for salt made from earth containing a comparatively high percentage of sodium chloride water high
Implementation method, further illustrates to technical scheme.
It is of the present invention it is continuous production Two-way Cycle freezing and crystallizing device, including crystallisation chamber 1, heat exchanger 6, Matter Transfer pipe 4,
Refrigerant circulation pipe 5, discharge duct 2.Heat exchanger 6 is setting up and down with crystallisation chamber 1, and discharge duct 2 is placed in the bottom of crystallisation chamber 1, heat exchanger 6,
Crystallisation chamber 1 and discharge duct 2 are located on same axis, Matter Transfer pipe 4 connection crystallisation chamber 1 and heat exchanger 6, refrigerant circulation pipe 5
Connected with heat exchanger 6.
The crystallisation chamber 1 is tubular structure, and middle part is cylinder, up and down respectively short cone.The middle part cylinder of crystallisation chamber 1
Truncated cone-shaped guide shell 10 is set with vivo, and crystallisation chamber 1 is communicated with inside guide shell 10.The top edge of guide shell 10 and cylinder top edge
Engagement, cylinder top outer rim is provided with exhaust outlet 11 and is provided with overfall.
The discharge duct 2 is the pipe for being arranged on the short cone lower end in the bottom of crystallisation chamber 1, and discharge duct 2 is provided with slurry and goes out
Mouth, rinse mouth and evacuation port.
The heat exchanger 6 is cylinder-like structure, and cylinder lower end is connected with the short cone in the top of crystallisation chamber 1, heat exchanger bottom
Portion sets trumpet type discharging opening 9,10 in the truncated cone-shaped guide shell in the insertion middle part cylinder of crystallisation chamber 1.
The Matter Transfer pipe 4 is placed in the side of crystallisation chamber 1 and heat exchanger 6, the upper orifice of Matter Transfer pipe 4 and heat exchanger 6
Top is joined directly together, and lower nozzle is connected with the conical sidewall of the bottom of crystallisation chamber 1.The middle part straight length of Matter Transfer pipe 4 and heat exchanger 6
With the axis parallel of crystallisation chamber 1, charging aperture is set, the bottom of middle part straight length is equipped with Matter Transfer pump 3 on the straight length of middle part.
The refrigerant circulation pipe 5 is placed in the side of heat exchanger 1, and upper lower nozzle is connected with the side wall upper and lower side of heat exchanger 1 respectively,
Refrigerant import is provided with outside the transverse tube of upper end, refrigerant exit is provided with outside the transverse tube of lower end.The bottom of refrigerant circulation pipe 5 is equipped with refrigerant circulation
Pump 8, the outside of the middle straight section of refrigerant circulation pipe 5 sets steam jacket 7, and upper end is provided with steam inlet, and lower end is provided with condensed water row
Outlet.
Continuous production Two-way Cycle freezing and crystallizing device of the present invention is applied to salt made from earth containing a comparatively high percentage of sodium chloride water high and continuously freezes nitre technique processed
Specific operation process is as follows：The salt made from earth containing a comparatively high percentage of sodium chloride water high of 25 DEG C of sodium sulphate contents 20% enters thing by the charging aperture on Matter Transfer pipe 4
Material circulation pipe, contacts in Matter Transfer pipe 4 with a large amount of low-temperature circulating feed liquids, enters together under the promotion of Matter Transfer pump 3
The top of heat exchanger 6.- 10 DEG C of calcium chloride brines from freezing unit enter cold by the refrigerant import on the top of refrigerant circulation pipe 5
Matchmaker's circulation pipe, carries out to salt made from earth containing a comparatively high percentage of sodium chloride water high in the heat exchanger 1 being cooled to -1 DEG C under the promotion of refrigerant circulation pump 8, -5 DEG C of part
Calcium chloride brine returns to freezing unit from the refrigerant exit of the bottom of refrigerant circulation pipe 5.Salt made from earth containing a comparatively high percentage of sodium chloride water high after cooling passes through trumpet type
Discharging opening 9 enters in crystallisation chamber 1, and the saltcake crystal grain of precipitation is settled downwards, and clear liquid and awns are realized in the lower edge of round platform guide shell 10
The separation of nitre slurry.Part sodium chloride crystal mixes with raw feed liquid as crystal seed with slurry suction material circulation pipe 4 and re-starts
Freezing crystallization.Remaining sodium chloride crystal is enriched with and is deposited in discharge duct 2 in the bottom of crystallisation chamber 1, the slurry discharge from discharge duct 2
Mouth is expelled to solid-liquid separating equipment and obtains saltcake；Sodium sulfate concentration 4% in clear liquid, is discharged by the overfall on the top of crystallisation chamber 1
The elutriation mouth set on discharge duct 2 is returned to next process or part to screen the crystallization for wherein depositing.
Claims (4)
1. a kind of continuous production Two-way Cycle freezing and crystallizing device, it is characterised in that including crystallisation chamber, heat exchanger, Matter Transfer pipe, cold
Matchmaker's circulation pipe and discharge duct.Heat exchanger is setting up and down with crystallisation chamber, and discharge duct is placed in crystallisation chamber bottom, heat exchanger, crystallisation chamber and
Discharge duct is located on same axis, and Matter Transfer pipe connection crystallisation chamber and heat exchanger, refrigerant circulation pipe are connected with heat exchanger；
The crystallisation chamber is cylinder-like structure, and middle part is cylinder, up and down respectively short cone；In the cylinder of crystallisation chamber middle part
Suit truncated cone-shaped guide shell, crystallisation chamber is communicated with inside guide shell；Cylinder top outer rim is provided with exhaust outlet and overfall；
The discharge duct is round tube shape structure, and lower end is short cone, equipped with slurry outlet, elutriation mouth and emptying on discharge duct
Mouthful；
The heat exchanger is cylinder-like structure, and cylinder lower end is connected with the short cone in crystallisation chamber top, and exchanger base is set
Trumpet type discharging opening, in the truncated cone-shaped guide shell in the cylinder of insertion crystallisation chamber middle part.
2. it is according to claim 1 it is continuous production Two-way Cycle freezing and crystallizing device, it is characterised in that the Matter Transfer pipe is put
In crystallisation chamber and the side of heat exchanger, Matter Transfer pipe upper orifice is joined directly together with heat exchanger top, under lower nozzle and crystallisation chamber
The conical sidewall in portion is communicated；Matter Transfer pipe middle part straight length and heat exchanger and the axis parallel of crystallisation chamber, middle part straight length
Upper setting charging aperture, the bottom of middle part straight length is equipped with Matter Transfer pump.
3. it is according to claim 1 it is continuous production Two-way Cycle freezing and crystallizing device, it is characterised in that the refrigerant circulation pipe is put
In the side of heat exchanger, upper lower nozzle is connected with heat exchanger side wall upper and lower side respectively, and refrigerant import is respectively provided with upper lower transverse tubule
And refrigerant exit, refrigerant circulation bottom of the tube is equipped with refrigerant circulation pump.
4. it is according to claim 3 it is continuous production Two-way Cycle freezing and crystallizing device, it is characterised in that in the refrigerant circulation pipe
Between the outside of straight section steam jacket is set, steam jacket upper and lower side is respectively provided with steam inlet and condensation-water drain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710239800.2A CN106823445A (en) | 2017-04-13 | 2017-04-13 | A kind of continuous production Two-way Cycle freezing and crystallizing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710239800.2A CN106823445A (en) | 2017-04-13 | 2017-04-13 | A kind of continuous production Two-way Cycle freezing and crystallizing device |
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| CN106823445A true CN106823445A (en) | 2017-06-13 |
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| CN201710239800.2A Pending CN106823445A (en) | 2017-04-13 | 2017-04-13 | A kind of continuous production Two-way Cycle freezing and crystallizing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111389044A (en) * | 2020-04-16 | 2020-07-10 | 天津天大清能环境工程有限公司 | Anti-scaling evaporative crystallization system and method |
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| CN102430261A (en) * | 2011-09-13 | 2012-05-02 | 浙江华亿工程设计有限公司 | Continuous cooling crystallizer |
| CN103405942A (en) * | 2013-08-29 | 2013-11-27 | 陈锦权 | Novel suspension type freeze concentration equipment |
| CN103432756A (en) * | 2013-08-16 | 2013-12-11 | 江苏嘉泰蒸发结晶设备有限公司 | All-in-one evaporation and crystallization device |
| CN204057987U (en) * | 2014-10-11 | 2014-12-31 | 中国轻工业长沙工程有限公司 | Saltcake continuous seepage freezing and crystallizing device |
| CN204684716U (en) * | 2015-06-01 | 2015-10-07 | 天津市茂联科技有限公司 | A kind of crystallization heat exchanger of uniform high-efficiency |
| CN206642403U (en) * | 2017-04-13 | 2017-11-17 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of continuous production Two-way Cycle freezing and crystallizing device |
-
2017
- 2017-04-13 CN CN201710239800.2A patent/CN106823445A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430261A (en) * | 2011-09-13 | 2012-05-02 | 浙江华亿工程设计有限公司 | Continuous cooling crystallizer |
| CN103432756A (en) * | 2013-08-16 | 2013-12-11 | 江苏嘉泰蒸发结晶设备有限公司 | All-in-one evaporation and crystallization device |
| CN103405942A (en) * | 2013-08-29 | 2013-11-27 | 陈锦权 | Novel suspension type freeze concentration equipment |
| CN204057987U (en) * | 2014-10-11 | 2014-12-31 | 中国轻工业长沙工程有限公司 | Saltcake continuous seepage freezing and crystallizing device |
| CN204684716U (en) * | 2015-06-01 | 2015-10-07 | 天津市茂联科技有限公司 | A kind of crystallization heat exchanger of uniform high-efficiency |
| CN206642403U (en) * | 2017-04-13 | 2017-11-17 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of continuous production Two-way Cycle freezing and crystallizing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111389044A (en) * | 2020-04-16 | 2020-07-10 | 天津天大清能环境工程有限公司 | Anti-scaling evaporative crystallization system and method |
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Application publication date: 20170613 |