CN103940250A - Fusing calcium carbide waste heat recovery method - Google Patents
Fusing calcium carbide waste heat recovery method Download PDFInfo
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- CN103940250A CN103940250A CN201410195288.2A CN201410195288A CN103940250A CN 103940250 A CN103940250 A CN 103940250A CN 201410195288 A CN201410195288 A CN 201410195288A CN 103940250 A CN103940250 A CN 103940250A
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- calcium carbide
- heat
- waste heat
- boiler
- pot
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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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
-
- 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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a fusing calcium carbide waste heat recovery method and belongs to the technical field of industrial energy conservation. A special calcium carbide pot, a boiler or a heat exchanger and a circulating fan are arranged in a waste heat recovery chamber. Forced air cooling is conducted on the special calcium carbide pot containing fusing calcium carbide liquid through the circulating fan. Air dissipates heat and is cooled through the boiler or the heat exchanger after flowing through the calcium carbide pot. The cooled air cools the calcium carbide pot in a circulating mode. After a liquid medium in the boiler or the heat exchanger absorbs heat, the temperature of the liquid medium rises or the liquid medium is turned to steam to be used in other processes. The internal medium of the boiler or the heat exchanger is changed so that gradient recovery and utilization of the waste heat of fusing calcium carbide can be achieved and the waste heat can be recovered to the maximum degree. The fusing calcium carbide waste heat recovery method has the advantages that gradient recovery and utilization of the waste heat of the fusing calcium carbide can be achieved, production energy consumption of the calcium carbide is reduced, the cooling period of the fusing calcium carbide can be greatly shortened, production efficiency is improved, and use is safe.
Description
Technical field
The invention belongs to industrial energy saving technical field, be specially a kind of melting calcium carbide exhaust heat recovering method.
Background technology
China's calcium carbide industry approximately has more than 1,000 of furnace of calcium carbide, within 2010, calcium carbide output reaches 2,200 ten thousand tons/year, and China has become the country of calcium carbide output and consumption figure maximum in the world.
As everyone knows, calcium carbide furnace gas has latent heat and the sensible heat of itself.For 4.5 ten thousand tons/year of furnaces of calcium carbide of separate unit, recycle furnace gas heat energy, be equivalent to save 7000 tons of standard coals; If to calculate in 2,200 ten thousand tons of years of China's calcium carbide production capacity, standard coal 330～3,500,000 ton can be saved every year in the whole nation.
The melting calcium carbide temperature of coming out of the stove is up to 1800-1900 degree, and its heat content is high, and heat is large; At present, in calcium carbide factory, molten condition calcium carbide is discharged after stove, is placed in air and forces cooling curing by long-time naturally cooling or air blast, and this any lost technique of a large amount of heat energy that allows is irrational.Its major defect one is the melting calcium carbide heat of solution (latent heat) of emitting while solidifying and solidifies temperature-fall period liberated heat (sensible heat) afterwards and be not all recovered utilization; The 2nd, naturally place cooling required time longer, production efficiency is low; Because solidifying cooling procedure, indoor, carry out again, need larger construction area, adopt air blast to force cooling a large amount of electric energy that need again to consume.
This part the more heat that solidifies in order to reclaim melting calcium carbide, emits when cooling, to save energy and reduce the cost, abroad, especially, in the poor Japan of energy resources, years of researches and practice have been carried out, the technology and equipment of multiple recovery heat has been proposed, mostly be to adopt direct heat transfer mode, produce steam for use such as generating, heating, which heat exchange efficiency is high, but equipment processing, production process are controlled and had relatively high expectations, and arbitrfary point occurs that leakage part will cause a serious accident.
The waste heat recovery of melting calcium carbide belongs to the ground zero stage at home, has also occurred at present multiple thinking, and a kind of is to utilize the wind granulation of quenching, and utilizes fluid bed to reclaim its part of waste heat; Be to change a calcium carbide cooling apparatus structure, utilize direct heat transfer mode recovery section calcium carbide heat; A kind of is to change calcium carbide pot structure to utilize tunnel cave concept to reclaim calcium carbide high-grade partial heat energy.
The common feature of above-mentioned melting calcium carbide waste heat reclaiming process: the one, reclaim high-grade waste heat partly, the part of waste heat after solidifying is still diffused in production environment, and the 2nd, calcium carbide is produced as digital process, for heat recovery, mentions., there is material risk and be unfavorable for that the step of melting calcium carbide waste heat reclaims, and is not suitable for applying of melting calcium carbide waste heat recovery aspect in the method for the recovery of existing melting calcium carbide waste heat.
Applicant before this name is called " a kind of for fast the calcium carbide pot of cooling, waste heat recovery ", the patent No. is the extraordinary calcium carbide pot of ZL201320367968.9, its structure is: a caldron body is equipped with a pot cover, the vertical section of pot body is up big and down small trapezoidal, pot body surrounding outer wall and bottom surface outer wall and pot cover outer wall are equipped with fin, and pot cover inwall is provided with a plurality of heat transfer poles that can enter in pot body.For protecting fin injury-free, can be at fin peripheral hardware fin containment vessel.By increasing heat transfer area and the heat exchange area of calcium carbide pot, accelerated melting calcium carbide and external agency heat exchange, can greatly shorten the cooling cycle of melting calcium carbide, enhance productivity; Owing to having set up pot cover, melting calcium carbide is sealed, can adopt air blast cooling, not only further accelerating cooling process, also helps the waste heat recovery of melting calcium carbide.Apparatus structure is simple, safe and reliable.
Summary of the invention
The object of the present invention is to provide a kind of melting calcium carbide exhaust heat recovering method, the method can be recycled calcium carbide waste heat by step, reduces calcium carbide energy consumption, can greatly shorten the cooling cycle of melting calcium carbide simultaneously, enhances productivity.
The object of the present invention is achieved like this: indoor extraordinary calcium carbide pot, boiler or heat exchanger, the circulating fan established of waste heat recovery, circulating fan is to holding the extraordinary calcium carbide pot forced air cooling of melting carbide liquid, flow through after the air of calcium carbide pot is heated and lower the temperature by boiler or heat exchanger heat release, the cooling calcium carbide pot of air re-circulation after cooling, heats up or becomes steam for other operations after liquid medium heat absorption in boiler or heat exchanger.
By changing boiler or heat exchanger interior media, can accomplish that the step of melting calcium carbide waste heat is recycled, and realize the maximization of waste heat recovery.Extraordinary calcium carbide pot is compared with the calcium carbide pot of current use, and its surface area increases several times, is conducive to calcium carbide pot and outside heat exchange fast, and can improves calcium carbide quality.
The present invention promotes and not only can improve calcium carbide production efficiency in calcium carbide industry, can in melting calcium carbide residual neat recovering system, apply simultaneously.
Beneficial effect of the present invention: can recycle calcium carbide waste heat by step, reduce calcium carbide energy consumption, can greatly shorten the cooling cycle of melting calcium carbide simultaneously, enhance productivity, use safety.
Fig. 1 is the technical process schematic diagram of embodiment.
The specific embodiment
See the embodiment that Fig. 1 shows: in waste heat recovery chamber 1, establish extraordinary calcium carbide pot 2, boiler 3, circulating fan 4.In figure, 5 is drum circulating water pipe, and 6 is condensate pipe, and 7 is filling pipe, and 8 is feed pipe, and 9 is drainpipe, and arrow represents air-flow direction.4 pairs of circulating fans hold extraordinary calcium carbide pot 2 forced air coolings of melting carbide liquid, flow through after the air of calcium carbide pot 2 is heated and lower the temperature by boiler 3 heat releases, the cooling calcium carbide pot 2 of air re-circulation after cooling, heats up or becomes steam for other operations after the interior liquid medium heat absorption of boiler 3.
Claims (2)
1. a melting calcium carbide exhaust heat recovering method, it is characterized in that: indoor extraordinary calcium carbide pot, boiler or heat exchanger, the circulating fan established of waste heat recovery, circulating fan is to holding the extraordinary calcium carbide pot forced air cooling of melting carbide liquid, flow through after the air of calcium carbide pot is heated and lower the temperature by boiler or heat exchanger heat release, the cooling calcium carbide pot of air re-circulation after cooling, heats up or becomes steam for other operations after liquid medium heat absorption in boiler or heat exchanger.
2. melting calcium carbide exhaust heat recovering method as claimed in claim 1, is characterized in that: by changing boiler or heat exchanger interior media, accomplish that the step of melting calcium carbide waste heat is recycled, and realize the maximization of waste heat recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195288.2A CN103940250A (en) | 2014-05-09 | 2014-05-09 | Fusing calcium carbide waste heat recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195288.2A CN103940250A (en) | 2014-05-09 | 2014-05-09 | Fusing calcium carbide waste heat recovery method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103940250A true CN103940250A (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410195288.2A Pending CN103940250A (en) | 2014-05-09 | 2014-05-09 | Fusing calcium carbide waste heat recovery method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928373A (en) * | 2016-04-22 | 2016-09-07 | 中山市明阳电器有限公司 | Efficient recovery device for waste heat of molten calcium carbide |
| CN108007223A (en) * | 2018-01-12 | 2018-05-08 | 重庆岩昱节能科技有限公司 | Crawler type calcium carbide waste-heat recovery device and recovery method |
-
2014
- 2014-05-09 CN CN201410195288.2A patent/CN103940250A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928373A (en) * | 2016-04-22 | 2016-09-07 | 中山市明阳电器有限公司 | Efficient recovery device for waste heat of molten calcium carbide |
| CN108007223A (en) * | 2018-01-12 | 2018-05-08 | 重庆岩昱节能科技有限公司 | Crawler type calcium carbide waste-heat recovery device and recovery method |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140723 |