CN108946774A - A kind of high-efficiency and energy-saving type kind divides intermediate temperature drop heat-exchange system - Google Patents
A kind of high-efficiency and energy-saving type kind divides intermediate temperature drop heat-exchange system Download PDFInfo
- Publication number
- CN108946774A CN108946774A CN201710371627.1A CN201710371627A CN108946774A CN 108946774 A CN108946774 A CN 108946774A CN 201710371627 A CN201710371627 A CN 201710371627A CN 108946774 A CN108946774 A CN 108946774A
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- Prior art keywords
- heat
- sleeve
- heat exchange
- temperature drop
- energy
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to a kind of heat-exchange systems more particularly to a kind of high-efficiency and energy-saving type kind of alumina producing Bayer process seeded precipitation process to divide intermediate temperature drop heat-exchange system.Extraction pipe is equipped in seed precipitation tank, extraction pipe is externally provided with heat exchange sleeve, the sleeve that exchanges heat is equipped with circulation upper hose mouth and circulating backwater nozzle, upper hose mouth is recycled to be located at the top of heat exchange sleeve, circulating backwater nozzle is located at heat exchange sleeve bottom, circulating backwater nozzle is connected to by pipeline with cooling tower, and cooling tower is connected to by pipeline with water cooling pond, and water cooling pond is connected to by pipeline with circulation upper hose mouth.Advantages of the present invention effect: the present invention welds the fin of augmentation of heat transfer on extraction pipe, and heat exchange sleeve is set outside it, forms sleeve heat exchanger.The heat exchange that recirculated water and aluminum hydroxide slime are realized during seed precipitation tank mentions material, intermediate temperature drop can be carried out to decomposable process by being not required to additional power source, thus save investment and operating cost.It is energy-saving with the obvious advantage compared with the existing interstage cooling system that need to be pumped with punishment in advance.
Description
Technical field
The present invention relates to the efficient of a kind of heat-exchange system more particularly to a kind of alumina producing Bayer process seeded precipitation process
Energy-saving kind point of intermediate temperature drop heat-exchange system.
Background technique
Seeded precipitation is a critical process of alumina producing Bayer process process.Seeded precipitation manufacturing technique requirent is to hydrogen
Alumina slurry carries out intermediate temperature drop, now generallys use wide-runner plate heat exchanger or spiral heat exchanger does intermediate temperature drop and sets
It is standby, although plate heat exchanger cooling has the characteristics that heat exchange efficiency is high, mating punishment in advance pump is needed, in addition plate heat exchanger is wanted
Regular alkali cleaning and mother liquor rinse, and need to be equipped with corresponding alkali cleaning mother liquor and rinse process.Thus there are energy for plate heat exchanger intermediate temperature drop
Consumption is high, rinses the disadvantage of process complexity.
Summary of the invention
In order to solve the above-mentioned technical problem the present invention provides a kind of high-efficiency and energy-saving type kind and divides intermediate temperature drop heat-exchange system, purpose
It is to reduce intermediate temperature drop process energy consumption, optimization kind division technique process.
A kind of high-efficiency and energy-saving type kind of the invention divides intermediate temperature drop heat-exchange system for the above-mentioned purpose, is equipped in seed precipitation tank and mentions material
Pipe, extraction pipe are externally provided with heat exchange sleeve, and heat exchange sleeve is equipped with circulation upper hose mouth and circulating backwater nozzle, recycles upper hose mouth
At the top of heat exchange sleeve, circulating backwater nozzle is located at heat exchange sleeve bottom, and circulating backwater nozzle is connected by pipeline and cooling tower
Logical, cooling tower is connected to by pipeline with water cooling pond, and water cooling pond is connected to by pipeline with circulation upper hose mouth.
Fin is welded on extraction pipe.
The sleeve diameter that exchanges heat is greater than the outer diameter of extraction pipe, difference 20-300mm；The length of heat exchange sleeve is less than extraction pipe
Length, extraction pipe both ends stretch out heat exchange sleeve.
Cold water in water cooling pond is sent to circulation upper hose mouth by water circulating pump.
Cooling tower cools down to circulating backwater by the way of air-cooled.
The axle center of extraction pipe and heat exchange sleeve is overlapped, and exchange heat sleeve both ends steel plate welded seal, and the sleeve that exchanges heat is every 3 meters
One fixed frame is set, and fixed frame is taken root in seed precipitation tank slot inner wall.
For recirculated water from heat exchange sleeve bottom discharge, the recirculated water after discharging flows out seed precipitation tank along vertical pipe straight up, returns
To cooling tower, vertical pipe is fixed by the bracket in slot inner wall, and the spout elevation and heat exchange sleeve of vertical pipe recycle upper hose mouth mark
It is high identical.
Pipeline between water circulating pump and circulation upper hose mouth is equipped with acid tube in pickling, sets on the return pipe outside seed precipitation tank
Acid recovering for acid washing pipe is set, acid tube is equipped with the first diaphragm valve in pickling, and Acid recovering for acid washing pipe is equipped with the second diaphragm valve, in water circulating pump
With in pickling between acid tube pipeline be equipped with third diaphragm valve, between Acid recovering for acid washing pipe and cooling tower be arranged the 4th diaphragm valve.
Advantages of the present invention effect: the present invention welds the fin of augmentation of heat transfer on extraction pipe, and heat exchange is set outside it
Sleeve forms sleeve heat exchanger.The heat exchange that recirculated water and aluminum hydroxide slime are realized during seed precipitation tank mentions material, is not required to add
Power source can carry out intermediate temperature drop to decomposable process, energy-saving excellent compared with the existing interstage cooling system that need to be pumped with punishment in advance
Gesture is obvious.
Detailed description of the invention
Fig. 1 is system flow chart of the invention.
Fig. 2 is the schematic diagram of the vertical fin of extraction pipe of the present invention.
Fig. 3 is the schematic diagram of the horizontal fin of extraction pipe of the present invention.
Fig. 4 is the schematic diagram of extraction pipe helical fin of the present invention.
In figure: 1, extraction pipe；2, exchange heat sleeve；3, water circulating pump；4, cooling tower；5, water cooling pond；6, acid tube in pickling；7,
Acid recovering for acid washing pipe；8, the first diaphragm valve；9, the second diaphragm valve；10, third diaphragm valve；11, the 4th diaphragm valve；12, water in circulation
Nozzle；13, circulating backwater nozzle；14, fin；15, vertical pipe.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown, a kind of high-efficiency and energy-saving type kind of the present invention divides intermediate temperature drop heat-exchange system, extraction pipe is equipped in seed precipitation tank
1, extraction pipe 1 is externally provided with heat exchange sleeve 2, and heat exchange sleeve 2, which is equipped with, recycles upper hose mouth 12 and circulating backwater nozzle 13, in circulation
Hose nozzle 12 is located at 2 top of heat exchange sleeve, and circulating backwater nozzle 13 is located at heat exchange 2 bottom of sleeve, and circulating backwater nozzle 13 passes through
Pipeline is connected to cooling tower 4, and cooling tower 4 is connected to by pipeline with water cooling pond 5, and water cooling pond 5 passes through pipeline and circulation upper hose mouth
12 connections.
Fin 14 is welded on extraction pipe 1, fin is vertical, horizontal or spiral setting, is used for enhanced heat transfer effect.
2 internal diameter of sleeve that exchanges heat is greater than the outer diameter of extraction pipe 1, difference 20-300mm；The length of heat exchange sleeve 2, which is less than, mentions material
Heat exchange sleeve 2 is stretched out at the length of pipe 1,1 both ends of extraction pipe.The present embodiment exchanges heat sleeve diameter greater than extraction pipe outer diameter 100mm, mentions
Heat exchange sleeve 300mm is stretched out at the top of expects pipe 1, heat exchange sleeve 800mm is stretched out in 1 bottom of extraction pipe.
Cold water in water cooling pond 5 is sent to circulation upper hose mouth 12 by water circulating pump 3.
Cooling tower 4 cools down to circulating backwater by the way of air-cooled.
The axle center of extraction pipe 1 and heat exchange sleeve 2 is overlapped, and exchange heat 1 both ends of sleeve steel plate welded seal, and heat exchange sleeve 1 is every
Every 3 meters of settings, one fixed frame, fixed frame is taken root in seed precipitation tank slot inner wall.
For recirculated water from heat exchange 2 bottom discharge of sleeve, the recirculated water after discharging flows out seed precipitation tank along vertical pipe 15 straight up,
It is back to cooling tower 4, vertical pipe 15 is fixed by the bracket on slot inner wall, the spout elevation and the heat exchange circulation of sleeve 2 of vertical pipe 15
12 absolute altitude of hose nozzle is identical.
Pipeline between water circulating pump 3 and circulation upper hose mouth 12 is equipped with acid tube 6 in pickling, the return pipe outside seed precipitation tank
Upper setting Acid recovering for acid washing pipe 7, acid tube 6 is equipped with the first diaphragm valve 8 in pickling, and Acid recovering for acid washing pipe 7 is equipped with the second diaphragm valve 9,
Third diaphragm valve 10 is equipped between acid tube 6 on pipeline on water circulating pump 3 and pickling, between Acid recovering for acid washing pipe 7 and cooling tower 4
4th diaphragm valve 11 is set.
The working principle of the invention:
Circulating water flow is through the sleeve that exchanges heat, from top feed, bottom discharge；Aluminum hydroxide slime is flowed to through extraction pipe as from bottom
To top.Recirculated water and aluminum hydroxide slime counterflow heat exchange.Meanwhile recirculated water also with the hydrogen-oxygen outside extraction pipe, i.e., in seed precipitation tank
Change the heat exchange of aluminium slurry.The recirculated water flowed out from heat exchange sleeve flows out seed precipitation tank through being placed in the vertical pipe in slot straight up, is back to
Cooling tower.Exchange heat sleeve both ends sealing welding.Recirculated water in water cooling pond is sent into extraction pipe and heat exchange sleeve group by water circulating pump
At sleeve heat exchanger bottom, in extraction pipe uplink aluminum hydroxide slime cocurrent exchange heat.Recirculated water after heat exchange returns to
After cooling tower wind cooling temperature lowering, water cooling pond is entered by pipeline.To complete the circulation of recirculated water.
After sleeve heat exchanger operation a period of time heat transfer coefficient reduces, heat transfer effect is deteriorated, pickling can be carried out to it.Tool
Gymnastics conduct: third diaphragm valve and the 4th diaphragm valve are closed, sleeve heat exchanger is isolated.Open the first diaphragm valve and second
Diaphragm valve is passed through diluted acid to sleeve heat exchanger by acid tube in pickling, cleaning finish the spent acid after dirt from the discharge of Acid recovering for acid washing pipe,
It recycles.
Although the embodiment of the present application is described above in conjunction with attached drawing, the application does not limit to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, is not restrictive, those skilled in the art
Under the enlightenment of the application, when not departing from the application objective and scope of the claimed protection, it can also make very
Multi-form, these are belonged within the protection scope of the application.
Claims (8)
1. a kind of high-efficiency and energy-saving type kind divides intermediate temperature drop heat-exchange system, it is characterised in that be equipped with extraction pipe, extraction pipe in seed precipitation tank
It is externally provided with heat exchange sleeve, heat exchange sleeve is equipped with circulation upper hose mouth and circulating backwater nozzle, and circulation upper hose mouth is located at heat exchange
At the top of sleeve, circulating backwater nozzle is located at heat exchange sleeve bottom, and circulating backwater nozzle is connected to by pipeline with cooling tower, cooling tower
It is connected to by pipeline with water cooling pond, water cooling pond is connected to by pipeline with circulation upper hose mouth.
2. a kind of high-efficiency and energy-saving type kind according to claim 1 divides intermediate temperature drop heat-exchange system, it is characterised in that extraction pipe
On be welded with fin.
3. a kind of high-efficiency and energy-saving type kind according to claim 1 divides intermediate temperature drop heat-exchange system, it is characterised in that Heat exchange jacekt
Cylinder internal diameter is greater than the outer diameter of extraction pipe, difference 20-300mm；The length of heat exchange sleeve is less than the length of extraction pipe, extraction pipe two
Heat exchange sleeve is stretched out at end.
4. a kind of high-efficiency and energy-saving type kind according to claim 1 divides intermediate temperature drop heat-exchange system, it is characterised in that water cooling pond
Interior cold water is sent to circulation upper hose mouth by water circulating pump.
5. a kind of high-efficiency and energy-saving type kind according to claim 1 divides intermediate temperature drop heat-exchange system, it is characterised in that cooling tower
Cooled down by the way of air-cooled to circulating backwater.
6. a kind of high-efficiency and energy-saving type kind according to claim 1 divides intermediate temperature drop heat-exchange system, it is characterised in that extraction pipe
It is overlapped with the axle center of heat exchange sleeve, exchange heat sleeve both ends steel plate welded seal, and the sleeve that exchanges heat is every 3 meters of settings, one fixation
Frame, fixed frame are taken root in seed precipitation tank slot inner wall.
7. a kind of high-efficiency and energy-saving type kind according to claim 1 divides intermediate temperature drop heat-exchange system, it is characterised in that recirculated water
From heat exchange sleeve bottom discharge, the recirculated water after discharging flows out seed precipitation tank along vertical pipe straight up, is back to cooling tower, vertical pipe
It is fixed by the bracket in slot inner wall, the spout elevation of vertical pipe is identical as heat exchange sleeve circulation upper hose mouth absolute altitude.
8. a kind of high-efficiency and energy-saving type kind according to claim 1 divides intermediate temperature drop heat-exchange system, it is characterised in that recirculated water
Pipeline between pump and circulation upper hose mouth is equipped with acid tube in pickling, and Acid recovering for acid washing pipe is arranged on the return pipe outside seed precipitation tank,
Acid tube is equipped with the first diaphragm valve in pickling, and Acid recovering for acid washing pipe is equipped with the second diaphragm valve, the acid tube on water circulating pump and pickling
Between pipeline be equipped with third diaphragm valve, between Acid recovering for acid washing pipe and cooling tower be arranged the 4th diaphragm valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710371627.1A CN108946774A (en) | 2017-05-24 | 2017-05-24 | A kind of high-efficiency and energy-saving type kind divides intermediate temperature drop heat-exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710371627.1A CN108946774A (en) | 2017-05-24 | 2017-05-24 | A kind of high-efficiency and energy-saving type kind divides intermediate temperature drop heat-exchange system |
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| Publication Number | Publication Date |
|---|---|
| CN108946774A true CN108946774A (en) | 2018-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710371627.1A Pending CN108946774A (en) | 2017-05-24 | 2017-05-24 | A kind of high-efficiency and energy-saving type kind divides intermediate temperature drop heat-exchange system |
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| Country | Link |
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| CN (1) | CN108946774A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386721A (en) * | 2014-11-18 | 2015-03-04 | 杭州锦江集团有限公司 | Intermediate cooling device used in aluminum oxide decomposition trough and cooling process |
| CN106186009A (en) * | 2016-07-15 | 2016-12-07 | 开曼铝业（三门峡）有限公司 | A kind of alumina decomposition system and alumina decomposition slot device intermediate temperature drop method |
| CN106186010A (en) * | 2016-07-15 | 2016-12-07 | 开曼铝业（三门峡）有限公司 | A kind of alumina decomposition system and alumina decomposition slot device intermediate temperature drop method |
-
2017
- 2017-05-24 CN CN201710371627.1A patent/CN108946774A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386721A (en) * | 2014-11-18 | 2015-03-04 | 杭州锦江集团有限公司 | Intermediate cooling device used in aluminum oxide decomposition trough and cooling process |
| CN106186009A (en) * | 2016-07-15 | 2016-12-07 | 开曼铝业（三门峡）有限公司 | A kind of alumina decomposition system and alumina decomposition slot device intermediate temperature drop method |
| CN106186010A (en) * | 2016-07-15 | 2016-12-07 | 开曼铝业（三门峡）有限公司 | A kind of alumina decomposition system and alumina decomposition slot device intermediate temperature drop method |
Non-Patent Citations (1)
| Title |
|---|
| 匡照忠等: "《化工设备》", 30 April 2010, 化学工业出版社 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |
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| RJ01 | Rejection of invention patent application after publication |