CN107166808A - A kind of founding factory cooling water heat recovery method and its device - Google Patents
A kind of founding factory cooling water heat recovery method and its device Download PDFInfo
- Publication number
- CN107166808A CN107166808A CN201710333411.6A CN201710333411A CN107166808A CN 107166808 A CN107166808 A CN 107166808A CN 201710333411 A CN201710333411 A CN 201710333411A CN 107166808 A CN107166808 A CN 107166808A
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- China
- Prior art keywords
- water
- flue gas
- exchange unit
- gas heat
- heat
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
A kind of founding factory cooling water heat recovery method, using aluminium ingot cooling water (40~42 DEG C) as water source water resource heat pump (1), the flue gas heat-exchange unit (2) that aluminium ingot cooling water (40~42 DEG C) is shared with two 60T holding furnaces of composition the same line successively as a water side of the water resource heat pump (1) at water source, constitute the shared flue gas heat-exchange unit (3) of two 40T holding furnaces of the same line, constitute the shared flue gas heat-exchange unit (4) of two 30T holding furnaces of the same line, and group independent 30T holding furnace flue gas heat-exchange unit (5) into a line is connected in series, often flow through the hot water that a flue gas heat-exchange unit produced and be raised about 5 DEG C；The water side of 30T holding furnaces flue gas heat-exchange unit (5) is connected to the water inlet end of hot-tub (6).The present invention can reclaim cooling water heat manufacture hot water as domestic hot-water, send into worker's publilc baths, reduce boiler and steam, save the energy, while realizing the sealing and circulating cooling of cooling water, prevent cooling water evaporation to scatter and disappear, saving water resource.
Description
Technical field
The present invention relates to a kind of founding aluminium ingot cooling water heat with mixing furnace flue gas exhaust heat recovery technology simultaneously, particularly relate to
And a kind of founding factory cooling water heat recovery method and its device.
Background technology
Energy problem is the major issue for being related to China's sustainable development of socio-economy.The energy that current performance comes out is sent out economy
The restrictive function of exhibition, by as one of Chinese long-term principal contradiction that faces and must pull against.Realize that the year two thousand twenty is domestic
Total output value is than the ambitious goal of 2000 " quadrupling ", and China's energy field is again confronted with that " being doubled with the energy ensures economy
The output value quadruples " severe task.Therefore, it is necessary to continue to implement " exploitation develops simultaneously with saving, puts energy-conservation prior "
Energy development strategy.
" population, development and environment " is the theme of 21 century human social development.The saving of the energy means that pollutant is arranged
Protection of the energy-conservation of the industries such as the reduction put, especially electrolytic aluminium more to environment has important influence.Therefore, Metallurgy Energy Saving is not
Only be alleviate China energy supply and demand breach in the urgent need to even more realizing the need of economic society comprehensive coordinate and sustainable development
Will, be realize the people-oriented Scientific Outlook on Development, take a new road to industrialization in the urgent need to.
The content of the invention
The present invention solves the deficiencies in the prior art and provides one kind and be good at effectively preventing that founding aluminium ingot cooling water evaporation scatters and disappears,
Cooling tower disables economize on electricity, while the progress synchronous with aluminum holding furnace fume afterheat of the heat of cooling water is reclaimed into manufacture domestic hot-water's
Founding factory cooling water heat recovery method and its device.
In order to solve the above-mentioned technical problem, a kind of founding factory cooling water heat recovery method, comprises the following steps：
A, 40~42 DEG C of founding aluminium ingot cooling waters from founding factory are divided into two parts, a part is added by water resource heat pump
The middle warm water of 55 DEG C of thermosetting, another part is logical be connected with 20 DEG C of running water after with being cooled down to casting machine, to casting
Cooling water after machine cooling is mixed with above-mentioned 40~42 DEG C of foundings aluminium ingot cooling water, is circulated again；
B, 55 DEG C of middle warm water are sent to progress secondary heat exchange in many flue gas heat-exchange units by pipeline and heat up to form high temperature
Hot water；
C, high-temperature-hot-water is connected by pipeline with domestic water water inlet end.
Used in the present invention and 40~42 DEG C of aluminium ingot cooling water is replaced original that aluminium ingot is cold as the water source of water resource heat pump
But water delivers to cooling tower cooler, carries out aluminium ingot cooling water heat recovery, had both prevented aluminium ingot cooling water heat to be directly emitted to air
In cause waste, prevent cooling water from evaporating in itself lost again.Meanwhile, it can save electric energy because cooling tower is disabled.
The flue gas heat-exchange unit includes that the first flue gas heat-exchange unit and/or 40T holding furnaces that 60T holding furnaces share are shared
Two flue gas heat-exchange units and/or 30T holding furnaces shared the 3rd flue gas heat-exchange unit and/or the flue gas heat-exchange unit of 30T holding furnaces the 4th.Aluminium
Ingot cooling water is heated up by the flue gas heat-exchange unit of level Four holding furnace as being sequentially connected in series, and every grade of flue gas heat-exchange unit is successively by warm
Water extraction is high about 5 DEG C, while aluminium ingot cooling water heat is reclaimed, and effectively reclaims mixing furnace flue gas exhaust heat.Warm water is led in last
Cross the high-temperature-hot-water of 70 DEG C~75 DEG C of flue gas heat-exchange unit formation；Be sent to publilc baths hot-tub as health hot water hold office work have a bath or its
Its domestic water.
A kind of founding factory cooling water thermal device, including water resource heat pump, a 60T using aluminium ingot cooling water as water source are mixed
Close the 3rd shared cigarette of the second shared flue gas heat-exchange unit of the first shared flue gas heat-exchange unit of stove, 40T holding furnaces, 30T holding furnaces
Gas heat exchanger and the flue gas heat-exchange unit of 30T holding furnaces the 4th, the water resource heat pump are changed with the first flue gas heat-exchange unit, the second flue gas successively
The series connection of the hot flue gas heat-exchange unit of device the 3rd and the 4th flue gas heat-exchange unit, the water side of the 4th flue gas heat-exchange unit and domestic water
Hot-tub is connected.
In summary, the present invention be during a kind of circulating cooling for solving current founding aluminium ingot cooling water cooling water because steaming
Serious method is lost in the reasons such as hair, can effectively realize the sealing and circulating cooling of cooling water, prevent cooling water evaporation to scatter and disappear, save
Water resource, while cooling water heat can also be reclaimed, cooling tower disables economize on electricity, and synchronous using furnace flue gas exhaust heat is mixed, manufacture is defended
Heat water hold office work have a bath and other daily uses.The inventive method principle is simple, and saving water resource effect substantially, can be with
Cooling water heat is effectively reclaimed, Boiler Steam quantum of output can also be reduced, energy consumption is reduced, the aluminium ingot life of founding factory is can apply to
Production.
Brief description of the drawings
Fig. 1 is flow chart of the invention.
Embodiment
In order that the technological means of the present invention, workflow, application method are apparent to, with reference to specific embodiment,
The present invention is expanded on further.
Referring to Fig. 1, founding factory cooling water heat recovery method, including it regard aluminium ingot cooling water (40~42 DEG C) as water source
Water resource heat pump 1, two 60T holding furnaces flue gas heat-exchange units 2, two 40T holding furnaces flue gas heat-exchange units 3, two 30T mixing kiln gas
Heat exchanger 4, a holding furnace flue gas heat-exchange unit 5 and a cistern 6.
Further, the hot water that the water resource heat pump at aluminium ingot cooling water (40~42 DEG C) as water source flows out is sequentially connected in series logical
Cross two 60T holding furnaces flue gas heat-exchange units 2, two 40T holding furnaces flue gas heat-exchange units 3, two 30T holding furnaces flue gas heat-exchange units 4,
One holding furnace flue gas heat-exchange unit 5 is heated up.
Specifically：
The first step：Cooling water (low-grade hot water) from 40~42 DEG C of founding aluminium ingot is sent to aluminium ingot cooling water (40
~42 DEG C) as in the water resource heat pump 1 at water source, the cooling water transfer of recovery is produced into about 55 DEG C of middle warm water；
Second step：The middle temperature cooling water that the water resource heat pump 1 at aluminium ingot cooling water (40~42 DEG C) as water source is produced is sent
Secondary heat exchange heating is carried out into the shared flue gas heat-exchange unit 2 of two 60T holding furnaces, hot water heats up about 5 DEG C, to 60 DEG C or so；
3rd step：About 60 DEG C after completing heat exchange in the shared flue gas heat-exchange unit 2 of two 60T holding furnaces of the same line
Hot water, which is sent in the shared flue gas heat-exchange unit 3 of two 40T holding furnaces of other the same line, carries out three heat exchange heatings, hot water
Heat up again about 5 DEG C, to 65 DEG C or so；
4th step：Pact after completing heat exchange in the shared flue gas heat-exchange unit 3 of two 40T holding furnaces of other the same line
65 DEG C of hot water, which are sent in the shared flue gas heat-exchange unit 4 of two 30T holding furnaces of another line, carries out four heat exchange heatings, hot water
Heat up again about 5 DEG C, to 70 DEG C or so；
5th step：About 70 DEG C after completing heat exchange in the shared flue gas heat-exchange unit 4 of two 30T holding furnaces of the same line
Hot water, which is sent in single 30T holding furnaces flue gas heat-exchange unit 5, completes heat exchange, and about 70 DEG C of hot water are warming up into 75 DEG C or so；
6th step：About 75 DEG C of hot water after the completion of will heat up be sent to publilc baths hot-tub 6 as health hot water hold office work have a bath
Or other domestic waters.
Embodiment 1：
Referring to Fig. 1, the cooling water temperature by casting machine is 40~42 DEG C, is made using (40~42 DEG C) by aluminium ingot cooling water
For the water resource heat pump at water source, directly cooling water heat is reclaimed, about 55 DEG C of middle warm water is produced, then passes through holding furnace
Flue gas heat-exchange unit carry out heat exchange be warming up to 75 DEG C or so, as health hot water hold office work have a bath.
Before not using the present invention, cooling water relies on cooling tower consumption electric energy and carries out open cooling, daily because steaming
The water about 300m of the reasons such as hair loss3, and the waste of cooling water heat is caused, while hot water is by pot needed for worker's publilc baths
Stove steam output, increases boiler duty.
Measure and calculate through actual, after this method actual motion, by reclaiming casting process cooling water heat, every year
3.96 × 1010kcal/a of heat can be saved, is calculated by market steam coal calorific capacity for 5000kcal/kg, it is coal-fired equivalent to saving
7920t/a, coal price is calculated by 400 yuan/t, year 316.8 ten thousand yuan of economic benefit.Meanwhile, annual recyclable evaporation soft water about 132000
Ton, about 1,000,000 yuan of economic benefit of year (including running water softening expense)., daily can using electricity wisely because cooling tower is disabled
1500kWh, is calculated by 0.3 yuan/kWh, every year can about 150,000 yuan of power cost saving.
The foregoing describe the general principle, principal character and advantage of the inventive method.The technical staff of the industry should
Solution, the present invention is not limited to the above embodiments, merely illustrating the principles of the invention described in above-described embodiment and specification,
Without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, and these changes and improvements are all
Fall into scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (4)
1. a kind of founding factory cooling water heat recovery method, it is characterised in that：Comprise the following steps：
A, 40~42 DEG C of founding aluminium ingot cooling waters from founding factory are divided into two parts, a part heats shape by water resource heat pump
Into 55 DEG C of middle warm water, another part forms less than 30 DEG C cooling water after being connected with 20 DEG C of running water is carried out to casting machine
Cooling, water is mixed with above-mentioned 40~42 DEG C of foundings aluminium ingot cooling water after being cooled down to casting machine, is circulated again；
B, 55 DEG C of middle warm water are sent to progress secondary heat exchange in flue gas heat-exchange unit by pipeline and heat up to form high-temperature-hot-water；
C, high-temperature-hot-water is connected by pipeline with domestic water water inlet end.
2. founding factory cooling water heat recovery method according to claim 1, it is characterised in that：The flue gas heat-exchange unit bag
Include shared the first flue gas heat-exchange unit (2) of 60T holding furnaces and/or shared the second flue gas heat-exchange unit (3) of 40T holding furnaces and/or
30T holding furnaces shared the 3rd flue gas heat-exchange unit (4) and/or the flue gas heat-exchange unit (5) of 30T holding furnaces the 4th.
3. founding factory cooling water heat recovery method according to claim 1 or 2, it is characterised in that：Middle warm water passes through
The high-temperature-hot-water of 70 DEG C~75 DEG C of flue gas heat-exchange unit formation.
4. a kind of founding factory cooling water thermal device, using the cooling water heat recovery side of casting factory described in one of claims 1 to 3
Method, it is characterised in that：Aluminium ingot cooling water is regard as the first shared cigarette of water resource heat pump (1), the 60T holding furnaces at water source including one
The 3rd shared flue gas heat-exchange unit (4) of shared the second flue gas heat-exchange unit (3) of gas heat exchanger (2), 40T holding furnaces, 30T holding furnaces
With the flue gas heat-exchange unit (5) of 30T holding furnaces the 4th, the water resource heat pump successively with the first flue gas heat-exchange unit (2), the second flue gas heat exchange
The flue gas heat-exchange unit (4) of device (3) the 3rd and the 4th flue gas heat-exchange unit (5) series connection, the water side of the 4th flue gas heat-exchange unit (5) with
Hot-tub (6) connection of domestic water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710333411.6A CN107166808A (en) | 2017-05-12 | 2017-05-12 | A kind of founding factory cooling water heat recovery method and its device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710333411.6A CN107166808A (en) | 2017-05-12 | 2017-05-12 | A kind of founding factory cooling water heat recovery method and its device |
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| Publication Number | Publication Date |
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| CN107166808A true CN107166808A (en) | 2017-09-15 |
Family
ID=59815533
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710333411.6A Pending CN107166808A (en) | 2017-05-12 | 2017-05-12 | A kind of founding factory cooling water heat recovery method and its device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107726910A (en) * | 2017-10-26 | 2018-02-23 | 中南大学 | A kind of electrolytic aluminium factory waste heat step recovering system and recovery method |
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| CN204830578U (en) * | 2015-06-08 | 2015-12-02 | 张跃 | Low -grade heat is retrieved and heat pump lift system in grades |
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| CN102588946A (en) * | 2012-03-19 | 2012-07-18 | 杭州哲达科技股份有限公司 | Self-balancing distributed type steam dragging method and self-balancing distributed type steam dragging system utilizing industrial circulating water waste heat |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107726910A (en) * | 2017-10-26 | 2018-02-23 | 中南大学 | A kind of electrolytic aluminium factory waste heat step recovering system and recovery method |
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Application publication date: 20170915 |
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