CN102997274A - Heat recovery system for high-temperature waste gas - Google Patents
Heat recovery system for high-temperature waste gas Download PDFInfo
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- CN102997274A CN102997274A CN2011102774450A CN201110277445A CN102997274A CN 102997274 A CN102997274 A CN 102997274A CN 2011102774450 A CN2011102774450 A CN 2011102774450A CN 201110277445 A CN201110277445 A CN 201110277445A CN 102997274 A CN102997274 A CN 102997274A
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- heat
- storage tank
- heat storage
- waste gas
- recovery system
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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
- 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
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention discloses a heat recovery system for high-temperature waste gas. The heat recovery system comprises a furnace body with a combustion space, at least one combustion device and a group of heat accumulating devices, wherein the combustion space of the furnace body is connected with an exhaust pipe; the combustion device is arranged beside the furnace body, and is connected with a heat energy recovery air blower and a heat energy recovery control valve; and the heat accumulating devices are assembled at the tail end of the exhaust pipe of the furnace body, and consist of a control valve, a first heat accumulating groove and a second heat accumulating groove. According to the heat recovery system disclosed by the invention, heat energy of high-temperature waste gas discharged by the furnace body is recovered by using the heat accumulating devices, low-temperature waste gas is exhausted, combustion-supporting air is introduced after the heat accumulating devices absorb heat to a saturated state, and normal-temperature air is introduced into the combustion space of the furnace body for using after being heated through the heat recovery system.
Description
Technical field
The present invention is about a kind of heat recovery system of high-temp waste gas, refer in particular to the high-temp waste gas that body of heater discharges, after regenerative apparatus reclaims heat energy, discharging lower temperature waste gas, treat the regenerative apparatus saturated importing combustion air that absorbs heat, use the row combustion space that imports body of heater again after heat recovery system is with the atmosphere temperature rising of normal temperature.
Background technology
Energy savings (being called for short energy-conservation) refers to use the mode resource conservation that reduces energy resource consumption, reduces the pollution to environment.Energy-conservationly can see through improve energy use efficiency, reduce energy resource consumption or reduce the consumption of the limited energy.
When country advocates energy-conservationly, can bring more financial capital, promote environmental quality and promote national security, personal safety and human comfort; When individuals and organizations advocate energy-conservationly, can reduce energy cost, promote economic security; When industry and the commercial user advocate energy-conservation, can by the raising energy use efficiency, its commercial profit is maximized.
Energy-conservationly reduce greenhouse gas emission to atmosphere, to reduce the carbon footprint, the greenhouse gases stable content in atmosphere can be avoided violent climate change a suitable level, makes us the chance that class damages to reduce harsh weather.
In the energy-conservation concept that reduces energy resource consumption, minimizing carbon footprint, not yet implement human lives's age, the large quantity of exhaust gas that various industrial combustion system discharges directly enters atmospheric, this waste gas is extremely unstable by the greenhouse gases content in the atmosphere, and its violent climate change, harsh climate make us class and cause irreparable harm.
For this reason, participating in the relevant dealer that combustion system is manufactured, is to discharge the waste gas with heat energy after utilizing burning, researches and develops the combustion system (seeing also Fig. 1) of an exhaust gas recycling heat energy, and it comprises a body of heater A, one group of fuel element B and one group of thermal storage unit C.
This body of heater A has a combustion space A1 as heat exchange area.
This fuel element B is comprised of at least one pair of the first combustor B1 and the second combustor B2, corresponding body of heater A two sides that are mounted on of two combustor B1, B2, it to be one opening frequently, one to close the mode of rotating alternately, for the combustion space A1 of body of heater A provides combustion fuel (LPG or LNG); When the power of above-mentioned two combustor B1, B2 refers to fully burn, its per hour can burn how many quality (kilogram) or volume (m
3/ h is under the standard state) fuel, also supply with simultaneously corresponding heat energy output (kw/h or kcal/h).
This thermal storage unit C is mounted on body of heater A two sides, formed by the first accumulation of heat cylinder C1, the first air blast C2 and the second accumulation of heat cylinder C3, the second air blast C4, wherein, establish one first switch valve C5 between the first accumulation of heat cylinder C1 and the first combustor B1, and the first accumulation of heat cylinder C1 also links with the first air inlet non-return valve C11, in addition establish a second switch valve C6 between the second accumulation of heat cylinder C3 and the second combustor B2, and the second accumulation of heat cylinder C3 and link with the second air inlet non-return valve C31.
When the first combustor B1 of fuel element B starts, for the combustion space A1 of body of heater A provides fuel, this second combustor B2 is in response to closing and stop supplies fuel, when the first combustor B1 start, the second air blast C4 of thermal storage unit C is in response to startup, with the previous heat energy that stores of the second accumulation of heat cylinder C3, offer the fuel combustion that body of heater A participates in the first combustor B1 through the second combustor B2, the same time, the first switch valve C5 of thermal storage unit C starts, and makes the heat energy of discharging after the body of heater A burning derive and be stored in the first accumulation of heat cylinder C1 inside.
Otherwise, when the second combustor B2 of fuel element B starts, for the combustion space A1 of body of heater A provides fuel, this first combustor B1 is in response to closing and stop supplies fuel, when the second combustor B2 start, the first air blast C2 of thermal storage unit C is in response to startup, with the previous heat energy that stores of the first accumulation of heat cylinder C1, offer the fuel combustion that body of heater A participates in the second combustor B2, the same time, the second switch valve C6 of thermal storage unit C starts, and makes the heat energy of discharging after the body of heater A burning derive and be stored in the second accumulation of heat cylinder C3 inside.
Above-mentioned the first combustor B1 closes start, thermal energy storage amount by the first accumulation of heat cylinder C1 is controlled, when the first accumulation of heat cylinder C1 thermal energy storage is fully loaded with, the first combustor B1 provides immediately the fuel of body of heater A and closes, otherwise the first combustor B1 closes start, is controlled by the thermal energy storage amount of the second accumulation of heat cylinder C3, fully loaded when the second accumulation of heat cylinder C3 thermal energy storage, the second combustor B2 provides immediately the fuel of body of heater A and closes.
The above-mentioned combustion system of commonly using still has following shortcoming and demands urgently improving:
1. if the required heat energy N 11,000 of the body of heater A of above-mentioned combustion system blocks, the heat energy output that one combustor provides is required to be 2N 11,000 cards can carry out the running of combustion system, this fuel element B is at least by mutual one the opening, one close and form of a pair of (Cheng Shuan's) first combustor B1 and the second combustor B2, because the acquisition cost of a combustor is very expensive, has the shortcoming of the industry applications of not meeting.
2. above-mentioned combustion system is burnt alternately, the operating mode of mutual accumulation of heat, the first combustor B1 and the second combustor B2 one are opened frequently, one pass provides fuel (namely to open in about 2 to 3 minutes, close once), the combustor that its short time rotates alternately and mutual moment starts, make the running of combustion system have the very huge shortcoming of waste of fuel, when especially combustor comes into operation, flame temperature needs some times (needing at least for 5 seconds) by low-temperature-rise to high temperature, the fuel major part that this section temperature rise time combustor provides is all wasted, each starts the fuel that circulation (3 minutes) wasted for 5 seconds to suppose combustor, and the cost that its combustion system is wasted should not be underestimated really.
3. the above-mentioned combustion system open and close startup combustor of rotating frequently, this violent cold/hot temperature changes, and makes machinery equipment bear thermal shock extremely, the main cause that this damages easily for machinery equipment, service life is of short duration.
4. above-mentioned combustion system is because frequently open and close of combustor, making machinery equipment bear violent cold/hot temperature changes, so the first accumulation of heat cylinder C1 of thermal storage unit C and the second accumulation of heat cylinder C3, must be arranged at the position near body of heater A, otherwise the accumulation of heat effect of two accumulation of heat cylinders will be restricted, when first and second accumulation of heat cylinder C1, C3 too near body of heater A, also will be subject to space and environment and can't accomplish to be fit to the volume of accumulation of heat, when the storage volume deficiency of accumulation of heat cylinder, its space that still makes progress with regard to the burning benefit.
5. the above-mentioned combustion system pipeline of deriving burnt gas and injecting heat energy storage is same, and it increases degree of difficulty of heat energy insulation, and when the heat energy that is stored in the accumulation of heat cylinder can't keep temperature, the problem of the empty consumption of its heat energy namely becomes the problem that combustion system must overcome.
6. the frequent open and close of above-mentioned combustion system reach the combustor of the start of rotating alternately, it provides the fuel associated components that (LPG or LNG) lights, after frequent open and close are used, the problem of damage and delay effect is arranged easily, it will cause the incomplete safety problem of fuel combustion.
The whence this, the present invention is provided with solving the problem that the actual use of above-mentioned known located by prior art faces.
Summary of the invention
The object of the invention is to, a kind of heat recovery system of high-temp waste gas is provided, its structure is simpler, and operation is convenient, and only a combustor need be set can realize recuperation of heat, has reduced cost, has saved the energy, avoids the incomplete defective of fuel combustion.
The invention provides a kind of heat recovery system of high-temp waste gas, it comprises one and has the body of heater of a combustion space, burner and one group of regenerative apparatus that at least one is mounted on the body of heater side;
The combustion space of this body of heater links a blast pipe;
This burner links one and reclaims heat energy air blast and a recovery heat energy control valve;
This regenerative apparatus is mounted on the blast pipe end of body of heater, is comprised of a control valve, one first heat storage tank and one second heat storage tank; This control valve is mounted on the blast pipe end, and it goes out end and links respectively one first delivery line and the second delivery line; This first heat storage tank and the first delivery line link, and the first heat storage tank links with the first air inlet non-return valve and first row gas non-return valve in addition, and first row gas non-return valve links with first row tympanites blower fan again, in addition, link one first between the first heat storage tank and the above-mentioned recovery heat energy control valve and reclaim the heat energy conduit; This second heat storage tank and the second delivery line link, and the second heat storage tank links with the second air inlet non-return valve and second row gas non-return valve in addition, and second row gas non-return valve links with second row tympanites blower fan again, in addition, link one second between the second heat storage tank and the above-mentioned recovery heat energy control valve and reclaim the heat energy conduit.
It is inner that above-mentioned first and second air inlet non-return valve system imports first and second heat storage tank for combustion air.
Above-mentioned first and second exhaust non-return valve system is for the toxic emission of first and second heat storage tank lower temperature.
The heat recovery system of high-temp waste gas of the present invention has following advantages:
1. heat recovery system of the present invention, the waste gas of its body of heater discharging high temperature, after regenerative apparatus reclaims heat energy, discharging lower temperature waste gas, treat that the regenerative apparatus heat absorption imports combustion air after saturated, use the row combustion space that imports body of heater again after heat recovery system is with the atmosphere temperature rising of normal temperature.
2. heat recovery system of the present invention, its burner only need arrange at least one and get final product (commonly use burning and need at least 2), constantly provide fuel and regenerative apparatus that the heat energy that is reclaimed by waste gas constantly is provided by burner, make the permanent high temperature that keeps of flame temperature in body of heater internal-combustion space in order to right burning, bear the problem that the extreme heat impact is produced to improve machinery equipment.
3. if the required heat energy N 11,000 of the body of heater of heat recovery system of the present invention blocks, use can constantly provide heat energy output 2N single burner of 11,000 cards, can carry out the running of combustion system completely, this burner reduces the acquisition cost of combustion system, fills part and meets industry applications.
4. the burner of heat recovery system of the present invention, the operating mode of the combustion space fuel of body of heater constantly is provided, can improve the combustor of commonly using combustion system one opens frequently, one closes fuel is provided, cause the very huge shortcoming of waste of fuel, the present invention constantly provides the burner of fuel, can make the flame temperature of inside, combustion space remain on high temperature, when flame temperature not by the problem of low-temperature-rise to high temperature, but the waste of fuel saving cost.
5. the burner of heat recovery system of the present invention, rotating without frequent open and close starts and problem that violent cold/hot temperature changes, and this machinery equipment need not born thermal shock extremely, and when machinery equipment is not easy to damage, must increase service life.
6. the burner of heat recovery system of the present invention, without frequently open and close, make machinery equipment bear the problem that violent cold/hot temperature changes, so the first heat storage tank of regenerative apparatus and the second accumulation of heat cylinder groove, need not to be arranged at the position near body of heater, two heat storage tanks can be made as larger storage volume in response to actual demand, and it promotes the accumulation of heat effect of combustion combustion system and burning benefit.
7. heat recovery system of the present invention derives burnt gas and injects the pipeline of heat energy storage different, and it reduces degree of difficulty of heat energy insulation, and when the heat energy that is stored in the accumulation of heat cylinder can keep temperature, the problem of the empty consumption of its heat energy is overcome.
8. heat recovery system of the present invention is improved the problem that the frequent open and close of combustor reach the start of rotating alternately of commonly using, it constantly provides fuel (LPG or LNG) to make the associated components of fire fuel not need frequent open and close start, it is without the problem of easy damage and delay effect, and then the incomplete safety problem of fuel combustion can obtain to improve.
Description of drawings
Fig. 1: the block diagram of commonly using combustion system.
Fig. 2: the heat recovery system block diagram of high-temp waste gas of the present invention.
The specific embodiment
See also Fig. 2, the heat recovery system of high-temp waste gas of the present invention, it comprises one and has the body of heater 1 of combustion space 11, at least one burner 2 and one group of regenerative apparatus 3.
This body of heater 1 has a combustion space 11, and its combustion space 11 links a blast pipe 111.
This burner 2 is mounted on body of heater 1 side, it is in continual mode, for the combustion space 11 of body of heater 1 provides combustion fuel (LPG or LNG), and burner 2 links one and reclaims heat energy air blast 21, and reclaims heat energy air blast 21 and link one and reclaim heat energy control valve 22; When the power of above-mentioned burner 2 refers to fully burn, its per hour can burn how many quality (kilogram) or volume (m
3/ h is under the standard state) fuel, also supply with simultaneously corresponding heat energy output (kw/h or kcal/h).
This regenerative apparatus 3 is mounted on blast pipe 111 ends of body of heater 1, is comprised of control valve 31, the first heat storage tank 32 and the second heat storage tank 33; This control valve 31 is mounted on blast pipe 111 ends, and it has two and goes out end and link with one first delivery line 311 and the second delivery line 312 respectively; The end that goes out of this first heat storage tank 32 and the first delivery line 311 links, and the first heat storage tank 32 links with the first air inlet non-return valve 321 and first row gas non-return valve 322 in addition, and the end that goes out of first row gas non-return valve 322 links with first row tympanites blower fan 323 again, in addition, link one first between the first heat storage tank 32 and the above-mentioned recovery heat energy control valve 22 and reclaim heat energy conduit 34; This second heat storage tank 33 and the second delivery line 312 link, and the second heat storage tank 33 links with the second air inlet non-return valve 331 and second row gas non-return valve 332 in addition, and the end that goes out of second row gas non-return valve 332 links with second row tympanites blower fan 333 again, in addition, link one second between the second heat storage tank 33 and the above-mentioned recovery heat energy control valve 22 and reclaim heat energy conduit 35.
The heat recovery system of high-temp waste gas of the present invention, the high-temp waste gas of its body of heater 1 discharging, through the energy recovery of recovery heat energy air blast 21 with high-temp waste gas, and discharging lower temperature waste gas; After first and second heat storage tank 32,33 heat absorptions of regenerative apparatus 3 are saturated, import the combustion air of general normal use via first and second air inlet non-return valve 321,331, then the first heat storage tank 32 of regenerative apparatus 3 and the second heat storage tank 33 can will be gone combustion space 11 uses that import body of heater 1 again behind the atmosphere temperature rising of normal temperature.
Use the heat recovery system of implementing high-temp waste gas of the present invention, when burner 2 starts, for the combustion space 11 of body of heater 1 constantly provides combustion fuel (LPG or LNG), the blast pipe 111 in the waste gas spontaneous combustion space 11 after its burning is discharged, this waste gas with high temperature enters the first heat storage tank 32 through control valve 31 and reclaims heat energy, at this moment, the first heat storage tank 32 outwards discharges via the waste gas of first row gas non-return valve 322 and first row tympanites blower fan 323 with lower temperature.When the waste gas of the first heat storage tank 32 discharging lower temperatures and stored heat energy fully loaded, the first heat storage tank 32 can import by the first air inlet non-return valve 321 combustion air of general normal use, and reclaim the heat energy that heat energy conduit 34 will reclaim via first, enter burner 2 inside via reclaiming heat energy control valve 22 and reclaiming heat energy air blast 21, so that the combustion air of combustion space 11 to be provided.
Otherwise, when entering the second heat storage tank 33 through control valve 31, the waste gas with high temperature reclaims heat energy, and at this moment, the second heat storage tank 33 outwards discharges via second row gas non-return valve 332 and second row tympanites blower fan 333 waste gas with lower temperature.When the second heat storage tank 33 discharging lower temperature waste gas and stored heat energy fully loaded, the second heat storage tank 33 can import by the second air inlet non-return valve 331 combustion air of general normal use, and reclaim the heat energy that heat energy conduit 35 will reclaim via second, enter burner 2 inside via reclaiming heat energy control valve 22 and reclaiming heat energy air blast 21, so that the combustion air of combustion space 11 to be provided.
The actual aluminum-alloy melting furnace that is used in of heat recovery system when high-temp waste gas of the present invention:
The normal working temperature of this calciner (flame temperature) is 1250 ℃, its toxic emission temperature is 900 ℃, this exhaust temperature be 900 ℃ after first and second heat storage tank 32,33 recuperations of heat, first and second vented drum blower fan 323,333 toxic emission temperature are 250 ℃, and this first and second heat storage tank 32,33 recovered temperatures then are 900 ℃-250 ℃=650 ℃.
Wherein, air at room temperature via first and second air inlet non-return valve 321,331 and first and second heat storage tank 32,33 enter in regular turn the combustion space 11 of burner 2 and body of heater 1, the heat that its regenerative apparatus 3 absorbs is (900 ℃+250 ℃)/2=575 ℃, and these 575 ℃ are the temperature that first and second heat storage tank 32,33 is supplied.Wherein, 30 ℃ of (room temperature)+575 ℃=605 ℃, these 605 ℃ are the actual combustion-supporting air themperature in body of heater 1 combustion space 11 that enters.
When the heat recovery system of commonly using calciner high-temp waste gas of the present invention not being installed, its ℃ (intake air temperature/room temperature)=1220,1250 ℃ of (operating temperature)-30 of required intensification number of degrees ℃.
When the heat recovery system that calciner has been installed high-temp waste gas of the present invention, its 1250 ℃ of (operating temperature)-605 of required intensification number of degrees ℃ (intake air temperature/through recuperation of heat)=645 ℃.
Then use the recuperation of heat actual effect of the heat recovery system of high-temp waste gas of the present invention to be: 645 ℃ of x (100%-35%)=419.25 ℃ (estimating the recuperation of heat loss is 35%), 100%-((1220 ℃-419.25 ℃)/1220 ℃)=34.36%.
Only, the above only is the heat recovery system preferred embodiment of high-temp waste gas of the present invention, is not to limit to feature of the present invention, such as utilizes the technological means that the present invention is correlated with, the again creation of founding principle, still belongs to creation category of the present invention.Therefore, to do statement be not to limit scope of the invention process to graphic and specification of the present invention; Anyly have the knack of this skill person, change and modify not breaking away from the equalization of doing under spirit of the present invention and the scope, all should be covered by in the claim of the present invention, the side is reasonable.
In sum, the present invention's " heat recovery system of high-temp waste gas " has the patent requirements such as novelty, progressive and industry applications; The applicant whence is according to the regulation of Patent Law, the application of mentioning patent to an ancient unit of weight office.
Claims (3)
1. the heat recovery system of a high-temp waste gas, it comprises one and has the body of heater of a combustion space, burner and one group of regenerative apparatus that at least one is mounted on the body of heater side;
It is characterized in that:
The combustion space of this body of heater links a blast pipe;
This burner links one and reclaims heat energy air blast and a recovery heat energy control valve;
This regenerative apparatus is mounted on the blast pipe end of body of heater, is comprised of a control valve, one first heat storage tank and one second heat storage tank; This control valve is mounted on the blast pipe end, and it goes out end and links respectively one first delivery line and the second delivery line; This first heat storage tank and the first delivery line link, and the first heat storage tank links with the first air inlet non-return valve and first row gas non-return valve in addition, and first row gas non-return valve links with first row tympanites blower fan again, in addition, link one first between the first heat storage tank and the above-mentioned recovery heat energy control valve and reclaim the heat energy conduit; This second heat storage tank and the second delivery line link, and the second heat storage tank links with the second air inlet non-return valve and second row gas non-return valve in addition, and second row gas non-return valve links with second row tympanites blower fan again, in addition, link one second between the second heat storage tank and the above-mentioned recovery heat energy control valve and reclaim the heat energy conduit.
2. the heat recovery system of high-temp waste gas as claimed in claim 1 is characterized in that, it is inner that this first and second air inlet non-return valve imports first and second heat storage tank for combustion air.
3. the heat recovery system of high-temp waste gas as claimed in claim 1 is characterized in that, this first and second exhaust non-return valve is for the toxic emission of first and second heat storage tank lower temperature.
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| CN2011102774450A CN102997274A (en) | 2011-09-19 | 2011-09-19 | Heat recovery system for high-temperature waste gas |
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| CN2011102774450A CN102997274A (en) | 2011-09-19 | 2011-09-19 | Heat recovery system for high-temperature waste gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222152A (en) * | 2015-11-09 | 2016-01-06 | 宁波平海建材有限公司 | The heat recovery system of high-temp waste gas |
| CN108260269A (en) * | 2017-12-25 | 2018-07-06 | 罗璐 | Low temperature plasma generating device and gas handling system |
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| JPH09126675A (en) * | 1995-11-01 | 1997-05-16 | Cosmo Eng Kk | Method of combustion and heating |
| JPH11325443A (en) * | 1998-05-09 | 1999-11-26 | Young Eng:Kk | Exhaust gas waste heat recovery device of heat storage combustor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105222152A (en) * | 2015-11-09 | 2016-01-06 | 宁波平海建材有限公司 | The heat recovery system of high-temp waste gas |
| CN108260269A (en) * | 2017-12-25 | 2018-07-06 | 罗璐 | Low temperature plasma generating device and gas handling system |
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Application publication date: 20130327 |