CN103884196B - A kind of smoke gas afterheat heat exchanger and retracting device - Google Patents
A kind of smoke gas afterheat heat exchanger and retracting device Download PDFInfo
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- CN103884196B CN103884196B CN201410085264.1A CN201410085264A CN103884196B CN 103884196 B CN103884196 B CN 103884196B CN 201410085264 A CN201410085264 A CN 201410085264A CN 103884196 B CN103884196 B CN 103884196B
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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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
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Abstract
The present invention relates to a kind of smoke gas afterheat heat exchanger for reclaiming kiln smoke discharging residual heat and retracting device, this smoke gas afterheat heat exchanger comprises a housing, some heat exchange modules and one water supply-return water system, housing is the square tube shape of its both-side opening horizontally disposed, the first slide rail of side plate inwall longitudinally some vertical layouts of spaced set, the second slide rail of longitudinally some vertical layouts of spaced set between base plate and the center line of top board, heat exchange module comprises tube sheet and the module cover of two vertical spacings settings, outside and the grooved carbon steel assembly welding of two tube sheets form water jacket, the lower end sealed upper end opening of two water jackets, wherein the opening of water jacket described in is water inlet, the opening of water jacket described in another is delivery port, be connected with between two water jackets and multiplely be arranged in parallel and be attached thereto logical light pipe, described in two the outside of water jacket respectively spaced set have some slide blocks, heat exchange module is connected between described first slide rail and described second slide rail of conllinear with it by the slide block of its both sides, and the water inlet of described heat exchange module is near the first slide rail side, and delivery port is near the second slide rail side.
Description
Technical field
The present invention relates to a kind of heat reclaim unit, particularly about a kind of smoke gas afterheat heat exchanger for reclaiming kiln smoke discharging residual heat and retracting device.
Background technology
Energy and environment problem is the major issue of restriction social development progress.Be subject to economy and technical merit limit, China's energy utilization rate is lower.Coal, oil, natural gas equal energy source mainly consume on the kiln of industrial enterprise, and industrial furnace high fume temperature, a large amount of waste heats that flue gas is taken away can not effectively utilize, this part waste heat is up to 30 ~ 60% of the Fuel Consumption of kiln own, these heat energy are discharged into without utilization in air, not only cause the significant wastage of heat, and ambient temperature can be caused to uprise, form thermal pollution.As can be seen here, Industrial Stoves smoke discharging residual heat is recycled and is had a high potential, and becomes one of current emphasis research topic.
Industrial Stoves smoke discharging residual heat is recovered in actual application that there are the following problems: (1) fume afterheat is difficult to obtain deep exploitation, because of the problem of flue gas low-temperature corrosion, high-temperature residual heat can only be recycled at present, and a large amount of waste heats below acid dew point cannot deep exploitation; Some smoke gas afterheat heat exchangers are in order to strengthen resistance to corrosion, and adopt enamel or fluorine moulding material as heat exchanger materials, Tube Sheet of Heat Exchanger wall thickness, heat-conductive characteristic is poor, and heat transfer effect is not good, and cost is relatively high; (2) a certain amount of flue dust is contained in industrial brickkiln smoke evacuation, cause flue gas heat-exchange unit dust stratification or blocking, affect heat transfer effect, particularly in the smoke evacuation of some brickkilns, flue dust viscosity is larger, as the smoke evacuation of coal gangue baked brick brickkiln, dust arrester is installed and also can not reaches good dust removing effects, and cause thermal loss; (3) flue gas heat-exchange unit repair and maintenance is inconvenient, place corrosion or reveal, the whole replacing of heat exchanger, and cost is high and cause flue gas waste heat recovery out of service, affects heat supply.
Summary of the invention
For the problems referred to above, the object of this invention is to provide the heat energy contained in a kind of kiln can smoke evacuation and carry out degree of depth recovery with the smoke gas afterheat heat exchanger of economize energy and retracting device.
For achieving the above object, the present invention is by the following technical solutions: a kind of smoke gas afterheat heat exchanger, it is characterized in that, it comprises: a housing, it is the square tube shape of its both-side opening horizontally disposed, described housing comprises biside plate, a base plate and a top board, side plate inwall described in each is longitudinally equidistantly fastenedly connected the first slide rail of some vertical layouts respectively, longitudinally equidistantly be fastenedly connected the second slide rail of some vertical layouts between described base plate and the center line of top board, and the second slide rail described in each all with the described first slide rail conllinear of its both sides;
Some heat exchange modules, described heat exchange module comprises the tube sheet that two vertical spacings are arranged and the module cover be fastenedly connected with two tube sheet tops, the outside of tube sheet described in two forms water jacket with the opening surface assembly welding of grooved carbon steel respectively, the lower end sealed upper end opening of water jacket described in two, wherein the opening of water jacket described in is water inlet, the opening of water jacket described in another is delivery port, multiplely be arranged in parallel and be attached thereto logical light pipe being connected with between water jacket described in two, described in two the outside of water jacket respectively spaced set have some slide blocks, described heat exchange module is connected between described first slide rail and described second slide rail of conllinear with it by the described slide block of its both sides, and the water inlet of described heat exchange module is near described first slide rail side, and delivery port is near described second slide rail side, and
One water supply-return water system, it comprises a water main and a return main, two water mains in parallel on described water main, the some water supply arms in parallel of water main described in each, the arm that supplies water described in each is connected with the water inlet of heat exchange module described in, two backwater mains in parallel on described return main, the some return branch in parallel of backwater main described in each, return branch described in each is connected with the delivery port of heat exchange module described in, at described water main top, described water main top, described backwater main end and described return main's end arrange a butterfly valve respectively, arm and the described return branch of supplying water described in each all arranges a ball valve and be flexible coupling.
In the described water jacket at the water inlet place of described heat exchange module, arrange the water inlet pipe of a both ends open, described water inlet pipe is fastenedly connected in the outer side of described water jacket, and spacing is left in the side inner with described water jacket; The length of described water inlet pipe in described water jacket exceedes the half of described water jacket length, and equidistantly offers some limbers towards the side at described tube sheet place.
Described housing, the first slide rail, the second slide rail, light pipe, slide block and water jacket are made up of carbon steel material; Described shell inner surface and described light pipe outer surface a layer thickness are the film be made up of mistake fluoroalkyl compound of 50 ~ 80 microns.
The described top board of described housing is the herring-bone form structure by a longeron and some crossbeam assembly weldings, and the spacing between each described crossbeam is greater than the width of described heat exchange module cross section.
Each described light pipe is evenly arranged in 1 ~ 4 plane, and the spacing between each described light pipe is 1.3 ~ 1.5 times of described light pipe external diameter.
The end face of described module cover is provided with one or two hangers.
A kind of flue gas waste heat recovery apparatus, it is characterized in that, it comprises multiple described smoke gas afterheat heat exchangers that horizontal interval is arranged, case serial connection is connected by first between each described smoke gas afterheat heat exchanger, described first connects the square tubular structure that case is both-side opening, and two openend is fastenedly connected with an openend of the described housing of described smoke gas afterheat heat exchanger respectively; Another openend of the described smoke gas afterheat heat exchanger at top is fastenedly connected second and connects case, described second company's case is the tubular structure of both-side opening, an one openend is square, described square aperture end connects described smoke gas afterheat heat exchanger, another openend is circular, described circular open ends connects furnace flue exhaust opening, and the area of square aperture is greater than the area of circular open.
The sidewall of described second company's case and first company's case described in each all offers one or more manhole flange, and described manhole flange covers and is welded with handle.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, smoke gas afterheat heat exchanger of the present invention adopts some independently heat exchange modules, there is the advantage that maintenance cost is little, once certain heat exchange module breaks down, only need change this heat exchange module, and avoid whole heat exchanger and scrap.2, in smoke gas afterheat heat exchanger of the present invention, heat exchange module and housing adopt slide rail mode to install, and make the installation and removal of single heat exchange module all very convenient.3, smoke gas afterheat heat exchanger of the present invention adopts carbon steel material to make, good heat-transfer, in flue gas heat-exchange unit, light pipe and surface of shell coating thin layer PFA(cross fluoroalkyl compound) film, light pipe and surface of shell smooth, non-caked dust, is convenient to cleaning, and has high temperature resistant, wear-resistant, decay resistance, effectively can avoid the sour gas corrosion such as sulfur dioxide, sulfur trioxide in being discharged fume by kiln, significantly extend its service life.4, flue gas waste heat recovery apparatus of the present invention adopts the heat exchanger of multiple series connection to form two-stage heat exchange, significantly can reduce fume afterheat, being used as thermal source after heat transport fluid in heat exchanger obtains heat from flue gas is used as with him, decreases the waste of heat energy, achieves the deep exploitation of fume afterheat.The present invention can be widely used in not higher than the recovery of the kiln gas waste heat of 250 DEG C.
Accompanying drawing explanation
Fig. 1 is the schematic front view of heat exchanger of the present invention;
Fig. 2 is the schematic top plan view of heat exchanger of the present invention;
Fig. 3 is the structural representation of heat exchange module of the present invention;
Fig. 4 is the schematic top plan view of inventive shell top board;
Fig. 5 is the schematic top plan view of retracting device of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
Fig. 1, Fig. 2 show according to smoke gas afterheat heat exchanger 100 provided by the invention, and it is horizontally disposed and the square tubular shell 1 of both-side opening that this smoke gas afterheat heat exchanger 100 comprises one, and housing 1 is formed primarily of biside plate 11, base plate 12 and a top board 13.Every side plate 11 inwall is longitudinally equidistantly fastenedly connected the slide rail 14 of some vertical layouts respectively.Longitudinally equidistantly be fastenedly connected the slide rail 15 of some vertical layouts between the center line of base plate 12 and top board 13, and each slide rail 15 all with slide rail 14 conllinear of its both sides.Between each slide rail 14 and the slide rail 15 of conllinear with it, a heat exchange module 2 is all set.
As shown in Figure 3, heat exchange module 2 comprises the tube sheet 21 that two vertical spacings are arranged and the module cover 22 be fastenedly connected with two tube sheet 21 tops, the outside of two tube sheets 21 forms water jacket 24 with the opening surface assembly welding of grooved carbon steel respectively, the lower end sealed upper end opening of two water jackets 24, wherein the opening of a water jacket 24 is water inlet, and the opening of another water jacket 24 is delivery port.Be connected with between two water jackets 24 and multiplely be arranged in parallel and be attached thereto logical light pipe 23, in the outside of two water jackets 24, spaced set has some slide blocks 25 respectively, heat exchange module 2 is connected between slide rail 14 and the slide rail 15 of conllinear with it by the slide block 25 of its both sides, and the water inlet of heat exchange module 2 is near slide rail 14 side, and delivery port is near slide rail 15 side.
Smoke gas afterheat heat exchanger 100 also comprises water supply-return water system 3(as shown in Figure 5), water supply-return water system 3 comprises water main 31 and a return main 34, two water mains 32 in parallel on water main 31, each water main some water supply arms 33 in parallel, each water supply arm is connected with the water inlet of a heat exchange module 2; Two backwater mains 35 in parallel on return main 34, each backwater main some return branch 36 in parallel, each return branch is connected with the delivery port of a heat exchange module 2.At water main top, water main top, backwater main end and return main's end arrange a butterfly valve 37 respectively; Each water supply arm and return branch all arrange a ball valve 38 and and is flexible coupling 39, be convenient to the water rate control of heat exchange module 2 and change dismounting, if namely a heat exchange module 2 breaks down, then close the ball valve 38 on the pipeline be connected with this heat exchange module 2, dismounting is flexible coupling 39, utilize slide rail 14,15 to extract heat exchange module 2, carry out in time keeping in repair and changing.
In above-described embodiment, as shown in Figure 3, can arrange the water inlet pipe 26 of a both ends open in the water jacket 24 at the water inlet place of heat exchange module 2, water inlet pipe 26 is fastenedly connected in the outer side of water jacket 24, and spacing is left in the side inner with water jacket 24; The length of water inlet pipe 26 in water jacket 24 exceedes the half of water jacket 24 length, and equidistantly offers some limbers towards the side at tube sheet 21 place.The setting of water inlet pipe 26 can ensure water comparatively uniformly across light pipe 23, avoids the water entering water jacket 24 from water inlet directly circulate from top light pipe 23 and cause heat exchange uneven.
In above-described embodiment, as shown in Figure 4, the top board 13 of housing 1 can for the herring-bone form structure by a longeron 131 and some crossbeams 132 assembly welding, and the spacing between each crossbeam 132 is greater than the width of heat exchange module 2 cross section.
In above-described embodiment, each light pipe 23 can arrange in one plane, also can be evenly arranged in 2 ~ 4 planes.
In above-described embodiment, the end face of module cover 22 can arrange one or two hangers 27, loads or pull out housing 1 to facilitate heat exchange module 2.
In above-described embodiment, housing 1, slide rail 14, slide rail 15, light pipe 23, slide block 25 and water jacket 24 can adopt carbon steel material to make, to ensure that heat exchanger has good heat transfer property.Housing 1 inner surface and light pipe 23 outer surface a layer thickness are that the PFA(of 50 ~ 80 microns crosses fluoroalkyl compound) film, housing 1 inner surface and light pipe 23 smooth outer surface can be made like this, thus non-caked dust, be convenient to cleaning.Meanwhile, because PFA film has high temperature resistant, wear-resistant, decay resistance, the property gas attack such as sulfur dioxide, sulfur trioxide in can effectively avoiding housing 1 and light pipe 23 to be discharged fume by kiln.
In above-described embodiment, the spacing between each light pipe 23 can be 1.3 ~ 1.5 times of light pipe 23 external diameter.Such light pipe 23 leaves gap again to each other compact arranged while, both ensure that good heat transfer effect, can resist a certain amount of flue dust again.
As shown in Figure 5, based on the smoke gas afterheat heat exchanger 100 provided in above-described embodiment, the invention allows for a kind of flue gas waste heat recovery apparatus, this flue gas waste heat recovery apparatus comprises multiple smoke gas afterheat heat exchangers 100 that horizontal interval is arranged, is connected in series between each smoke gas afterheat heat exchanger 100 by connecting case 4.Connect the square tubular structure that case 4 is both-side opening, two openend is fastenedly connected with an openend of the housing 1 of adjacent two smoke gas afterheat heat exchangers 100 respectively.Another openend of the smoke gas afterheat heat exchanger 100 at top is fastenedly connected one and connects case 5, connecting case 5 is the tubular structure of both-side opening, an one openend is square, for connecting smoke gas afterheat heat exchanger 100, another openend is circular, for connecting furnace flue exhaust opening, and the area of square aperture is greater than the area of circular open.
In above-described embodiment, each connects case 4 and connects on the sidewall of case 5 and all offers one or more manhole flange, and manhole flange covers welding handle, facilitates artificial repair and maintenance.
The flue gas waste heat recovery apparatus course of work of the present invention is summarized as follows:
Kiln smoke evacuation enters one-level smoke gas afterheat heat exchanger 100 by connecting case 5, with heat transport fluid (water) heat exchange passed through in heat exchange module 2 in one-level smoke gas afterheat heat exchanger 100, temperature enters the heat transport fluid heat exchange passed through in heat exchange module 2 in secondary heat exchanger and secondary smoke afterheat heat exchanger 100 after reducing, so repeatedly, until with smoke gas afterheat heat exchanger 100 heat exchange of end, flue-gas temperature is reduced to about 15 DEG C substantially, achieves the deep exploitation of fume afterheat.After heat transport fluid in first-class heat exchanger and flue gas heat exchange, temperature is higher, can reach 60 ~ 80 DEG C, can be directly used in heating; After heat transport fluid in secondary heat exchanger and flue gas heat exchange, temperature is lower, is re-used as thermal source and uses after source pump can be utilized to put forward heat.
Brickkiln smoke evacuation when smoke gas afterheat heat exchanger 100, the flue dust in smoke evacuation hinder by light pipe 23 layer by layer, be deposited in bottom heat exchanger shell, bottom the housing 1 of smoke gas afterheat heat exchanger 100 and between heat exchange module 2, leave certain space, be convenient to remove dust stratification.In addition, the base plate 12 of housing 1 offers through hole, and flue gas condensing water can flow out smoke gas afterheat heat exchanger by through hole, drains into condensate water recovery device outward.
The present invention is only described with above-described embodiment; the structure of each parts, setting position and connecting all can change to some extent; on the basis of technical solution of the present invention; all improvement of carrying out individual part according to the principle of the invention and equivalents, all should not get rid of outside protection scope of the present invention.
Claims (10)
1. a smoke gas afterheat heat exchanger, is characterized in that, it comprises:
One housing, it is horizontally disposed and the square tube shape of both-side opening, described housing comprises biside plate, a base plate and a top board, side plate inwall described in each is longitudinally equidistantly fastenedly connected the first slide rail of some vertical layouts respectively, between the center line and the center line of described top board of described base plate, be longitudinally equidistantly fastenedly connected the second slide rail of some vertical layouts, and the second slide rail described in each is all in same plane with described first slide rail of its both sides;
Some heat exchange modules, described heat exchange module comprises the tube sheet that two vertical spacings are arranged and the module cover be fastenedly connected with two tube sheet tops, the outside of tube sheet described in two forms water jacket with the opening surface assembly welding of grooved carbon steel respectively, the lower end sealed upper end opening of water jacket described in two, wherein the opening of water jacket described in is water inlet, the opening of water jacket described in another is delivery port, multiplely be arranged in parallel and be attached thereto logical light pipe being connected with between water jacket described in two, described in two the outside of water jacket respectively spaced set have some slide blocks, described heat exchange module is connected between described first slide rail and described second slide rail of conllinear with it by the described slide block of its both sides, and the water inlet of described heat exchange module is near described first slide rail side, and delivery port is near described second slide rail side, and
One water supply-return water system, it comprises a water main and a return main, two water mains in parallel on described water main, the some water supply arms in parallel of water main described in each, the arm that supplies water described in each is connected with the water inlet of heat exchange module described in, two backwater mains in parallel on described return main, the some return branch in parallel of backwater main described in each, return branch described in each is connected with the delivery port of heat exchange module described in, at described water main top, described water main top, described backwater main end and described return main's end arrange a butterfly valve respectively, arm and the described return branch of supplying water described in each all arranges a ball valve and be flexible coupling.
2. a kind of smoke gas afterheat heat exchanger as claimed in claim 1, it is characterized in that, the water inlet pipe of one both ends open is set in the described water jacket at the water inlet place of described heat exchange module, described water inlet pipe is fastenedly connected in the outer side of described water jacket, and spacing is left in the side inner with described water jacket; The length of described water inlet pipe in described water jacket exceedes the half of described water jacket length, and equidistantly offers some limbers towards the side at described tube sheet place.
3. a kind of smoke gas afterheat heat exchanger as claimed in claim 1, is characterized in that, described housing, the first slide rail, the second slide rail, light pipe, slide block and water jacket are made up of carbon steel material; Described shell inner surface and described light pipe outer surface a layer thickness are the film be made up of mistake fluoroalkyl compound of 50 ~ 80 microns.
4. a kind of smoke gas afterheat heat exchanger as claimed in claim 2, is characterized in that, described housing, the first slide rail, the second slide rail, light pipe, slide block and water jacket are made up of carbon steel material; Described shell inner surface and described light pipe outer surface a layer thickness are the film be made up of mistake fluoroalkyl compound of 50 ~ 80 microns.
5. a kind of smoke gas afterheat heat exchanger as claimed in claim 1 or 2 or 3 or 4, it is characterized in that, the described top board of described housing is the herring-bone form structure by a longeron and some crossbeam assembly weldings, and the spacing between each described crossbeam is greater than the wide of described heat exchange module cross section.
6. a kind of smoke gas afterheat heat exchanger as claimed in claim 1 or 2 or 3 or 4, it is characterized in that, each described light pipe is evenly arranged in 1 ~ 4 plane, and the spacing between each described light pipe is 1.3 ~ 1.5 times of described light pipe external diameter.
7. a kind of smoke gas afterheat heat exchanger as claimed in claim 5, is characterized in that, each described light pipe is evenly arranged in 1 ~ 4 plane, and the spacing between each described light pipe is 1.3 ~ 1.5 times of described light pipe external diameter.
8. a kind of smoke gas afterheat heat exchanger as described in claims 1 or 2 or 3 or 4, it is characterized in that, the end face of described module cover is provided with one or two hangers.
9. a flue gas waste heat recovery apparatus, it is characterized in that, it comprises multiple smoke gas afterheat heat exchangers as described in any one of claim 1 to 7 that horizontal interval is arranged, case serial connection is connected by first between each described smoke gas afterheat heat exchanger, described first connects the square tubular structure that case is both-side opening, and two openend is fastenedly connected with an openend of the described housing of smoke gas afterheat heat exchanger described in adjacent two respectively; Another openend of the described smoke gas afterheat heat exchanger at top is fastenedly connected second and connects case, described second company's case is the tubular structure of both-side opening, an one openend is square, described square aperture end connects described smoke gas afterheat heat exchanger, another openend is circular, described circular open ends connects furnace flue exhaust opening, and the area of square aperture is greater than the area of circular open.
10. a kind of flue gas waste heat recovery apparatus as claimed in claim 9, is characterized in that, the sidewall of described second company's case and first company's case described in each all offers one or more manhole flange, and described manhole flange covers and is welded with handle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410085264.1A CN103884196B (en) | 2014-03-10 | 2014-03-10 | A kind of smoke gas afterheat heat exchanger and retracting device |
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| CN201410085264.1A CN103884196B (en) | 2014-03-10 | 2014-03-10 | A kind of smoke gas afterheat heat exchanger and retracting device |
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| CN103884196B true CN103884196B (en) | 2015-09-09 |
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| CN104215079A (en) * | 2014-09-04 | 2014-12-17 | 山西太钢不锈钢股份有限公司 | Method and device for recycling flue gas waste heat of heating furnace |
| CN108758678A (en) * | 2018-08-04 | 2018-11-06 | 陕西大秦环境科技有限公司 | Nitrogen oxides minimum discharge system, discharge energy saver and flue gas waste heat recoverer |
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| CN2389341Y (en) * | 1999-08-30 | 2000-07-26 | 中国蓝星化学清洗总公司 | Vertical heat pipe type flue-gas waste heat recoverer |
| CN101118131A (en) * | 2007-09-04 | 2008-02-06 | 李福成 | High efficiency multilevel coil tube type heat switch |
| CN201322564Y (en) * | 2008-10-24 | 2009-10-07 | 江苏凯特尔工业炉有限公司 | Air preheater |
| CN101782340B (en) * | 2009-01-15 | 2013-06-12 | 王智慧 | Multi-stage type high-efficiency bellows waste heat recovery device |
| US9285172B2 (en) * | 2009-04-29 | 2016-03-15 | Westinghouse Electric Company Llc | Modular plate and shell heat exchanger |
| CN101592444A (en) * | 2009-06-23 | 2009-12-02 | 东南大学 | The corrugated hot plate type energy-saving appliance that is used for combustion gas and oil burning boiler flue gas waste heat recovery |
| CN102650505A (en) * | 2012-05-22 | 2012-08-29 | 西安交通大学 | Exhaust gas residual heat recovery device |
| CN103423759B (en) * | 2013-09-03 | 2015-09-30 | 哈尔滨工程大学 | A kind of waste heat recovering energy conserving device being adapted to chimney |
| CN103471072B (en) * | 2013-09-06 | 2016-08-17 | 昆山市利昆机电设备有限公司 | The vertical type module of waste heat boiler |
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