CN102927548A - Afterheat recycling device and method of high temperature flue gas containing high adhesive dust - Google Patents
Afterheat recycling device and method of high temperature flue gas containing high adhesive dust Download PDFInfo
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- CN102927548A CN102927548A CN2012105274992A CN201210527499A CN102927548A CN 102927548 A CN102927548 A CN 102927548A CN 2012105274992 A CN2012105274992 A CN 2012105274992A CN 201210527499 A CN201210527499 A CN 201210527499A CN 102927548 A CN102927548 A CN 102927548A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a device and a method capable of effectively cleaning dust on the surface of a heat exchange pipe and continuously operating for recycling afterheat of high temperature flue gas containing high adhesive dust and generating stream. According to the invention, a fuel is horizontally arranged, a heat pipe is used as a heat exchange element, the heat pipe is vertically arranged, and the lower segment of the heat pipe is at a free state for conveniently cleaning the dust. The heat pipe transmits the high temperature heat in the fuel to the water in a sleeve to evaporate water to generate stream so as to recycle the afterheat. A scraping plate is used as a dust cleaning device of the heat pipe in contact with the fuel gas, the scraping plate periodically moves up and down to scrap the dust at the outside of the heat pipe into a dust collection bin below a heat exchanger, and a sealed valve is arranged between the heat exchanger and a dust hopper to clean the dust online. According to the invention, the property of the heat pipe and the special scraping plate dust cleaning structure is utilized to solve the problem of cleaning the dust on the surface of the heat exchanger when recycling the afterheat of high temperature flue gas containing high adhesive dust.
Description
Technical field
The present invention relates to flue gas waste heat recovery apparatus and the method for industrial circle, particularly producing the temperature range of carrying in a large number the high-adhesion dust in the kiln production is the waste heat recovery of 700-1200 ℃ high-temperature flue gas.
Background technology
In some occasion of industrial circle, can produce a large amount of flue gases, flue-gas temperature needs to reclaim its heat to reach the purpose of energy-conserving and environment-protective up to 700 ~ 1200 ℃ before discharging.When steel plant utilize rotary hearth furnace to separate zinc in the iron dust containing, because the oxide powder and zinc ash has strong caking property, and amount of dust is very big, in the waste heat recovery process, a large amount of high bonding zinc oxide are bonded in heat exchanger surface, black dirt increases gradually, causes at last the residual heat system can't absorbing heat, causes the waste heat recovery difficulty.Contain special material in these dust simultaneously, the characteristics such as caking property is strong, dust particle diameter is trickle, light specific gravity that it has adopt extremely difficult removal of conventional dust collection method.And the waterpipe type waste heat boiler is adopted in the at present waste heat recovery of rotary hearth furnace high-temperature part more, and bend pipe or header tube are arranged at the heat exchanger tube bottom, and the knot that adopts present way can not remove on the heat exchanger tube is grey.And because dust quantity is very big, just ties in the short period and expired ash bucket.Cause whole heat exchanger to stop up, equipment can't use.Therefore, the rotary hearth furnace of all separation of Zinc all can't move continuously at present.Move about ten days need and stop, so that knot ash and ash bucket on labor cleaning's heat exchanger tube.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of and can effectively remove heat exchanger tube surface knot ash, the device that contains the dust high-temperature flue gas waste heat recovery of high bonding and producing steam of realization continuity operation.
The present invention includes horizontally disposed flue, heat exchanger, jacket pipe and drum; Described heat exchanger comprises some heat pipes, and heat pipe vertically arranges, and the shell orifice plate that its endotherm section passes flue is placed in the equipment flue, and unfixing, is in free state, and the heat release section of heat pipe is arranged on outside the flue, and inserts respectively in the jacket pipe; Described jacket pipe connects into the sheet tube bank by upper union and lower union, and the sheet tube bank is integrated by upper collecting chamber pipe and lower box collecting pipe series winding again; Upper collecting chamber pipe and lower box collecting pipe are communicated with drum by tedge and down-comer respectively; Scraper plate is equipped with in the endotherm section outside of heat pipe, and described scraper plate and transmission device are in transmission connection, and can move up and down in overall along heat pipe outer surface under actuator drives.
For fully guaranteeing the normal operating operation of scraping plate mechanism in the flue gas waste heat recovery process, further improve simultaneously flue gas waste heat recovery efficient, described scraper plate links to each other with transmission device by the water-cooled steel pipe, and this water-cooled steel pipe and heat pipe parallel columns are established.
Be convenient continuously online ash disposal, the bottom of described heat exchanger is provided with the collection ash silo, and collection ash silo top is provided with airtight valve, integrates ash silo as the drawer type ash bucket, can shift out online the knot ash.When working at ordinary times, airtight valve is opened, and the knot ash falls into the collection ash silo.Airtight valve is closed during ash discharge, extracts ash bucket out.Behind the deashing, again load onto ash bucket.
Described heat pipe can be light pipe or straight fins pipe, upper-lower seal, and the internal-filling liquid body medium, and vacuumize.
One aspect of the present invention adopts horizontally disposed flue, with the heat exchange element of heat pipe as heat exchanger, heat pipe is vertically placed, the heat pipe hypomere is in free state, be convenient to deashing, simultaneously the heat pipe epimere places in the jacket pipe, and heat pipe is passed to water in the sleeve pipe with the heat of high temperature in the flue, make its evaporation produce steam, thereby realize waste heat recovery; On the other hand, scraper plate is set as deashing device at the heat pipe outer surface that contacts with flue gas, and adopts simultaneously the drawer type ash bucket as the collection ash silo, between heat exchanger and ash bucket, be provided with sealed valve, realized online ash removal.The present invention has utilized the characteristic of heat pipe and special textural association, the difficult problem of heat exchanger surface deashing during the waste heat recovery that solved the high-temperature flue gas that contains high bonding dust.
Another technical problem to be solved by this invention provides a kind of high-temperature flue gas exhaust heat recovering method that utilizes said apparatus to realize.
The method of the invention may further comprise the steps,
(1) high-temperature flue gas enters in the horizontally disposed flue, and high-temperature flue gas and the heat pipe heat-absorbing section heat exchange that is arranged in the flue descend high-temperature flue-gas, and the high bonding dust in the high-temperature flue gas sinks knot on the heat pipe surface simultaneously;
(2) deaerated water enters in the jacket pipe from drum by down-comer, absorbs the heat release section liberated heat of heat pipe, produces steam; Steam enters drum by tedge again.
(3) be arranged at the scraper plate in the endotherm section outside of every heat pipe, move up and down along the heat pipe heat-absorbing section outer surface, in the collection ash silo of heavy knot below the high bonding dust on heat pipe heat-absorbing section surface scrapes heat exchanger.
After collection ash silo ash was full, the seal valve between closure set ash silo and the heat exchanger was extracted ash bucket out; Behind the deashing, again ash bucket is loaded onto, opened seal valve.
The steam that drum produces is finally delivered to the user by the output of the steam-water separator in drum drum by jet chimney.
As preferred version, each step of the method for the invention is specially:
(1) high-temperature flue gas that contains 1200-700 ℃ in a large amount of high bonding dust enters evaporimeter and heat pipe heat exchanging, and behind the heat pipe absorbing heat, flue-gas temperature drops to 200 ℃ and flowed out by evaporator outlet;
(2) deaerated water enters in the evaporator water sleeve pipe, and absorbing heat pipe liberated heat generation temperature is 110 ℃-275 ℃, and pressure is the following steam of 6Mpa;
(3) heavy knot is at the high bonding dust on heat pipe surface, and the scraper plate that is regularly moved up and down scrapes in the collection ash silo of evaporimeter below.
Can according to actual dust stratification situation, set the interval that moves up and down and the frequency of scraper plate.
Be compared with existing technology, the present invention has following advantage:
(1) adopt heat pipe as heat exchange element, the heat exchanger tube bottom does not have bend pipe or header tube, and hypomere is unfixing, is in free state, is difficult for the knot ash, easy to clean behind the knot ash;
(2) adopt the scraper-type deashing device, can effectively remove caking property knot ash;
(3) the collection ash silo is below heat exchanger, and Hatch Opening is provided with airtight valve, integrates ash silo as the drawer type ash bucket, can shift out online the knot ash when airtight valve is closed;
When (4) the high bonding of existence dust in flue gas, and dust is very big, can realize that whole device moves continuously.
Description of drawings
Fig. 1 is the overall structure schematic diagram of device of the present invention;
Fig. 2 is the jacket pipe sheet Pipe bundle structure schematic diagram of device of the present invention.
Among the figure: 1, steam output pipe; 2-tedge; 3-down-comer; 4-upper union; 5-jacket pipe; 6-lower union; 7-heat pipe; 8-gas approach; 9-scraper plate; 10-scraper plate tube connector; 11-drum; 12-deaerated water water inlet pipe; 13-scraper plate driving mechanism; 14-upper collecting chamber pipe; 15-lower box collecting pipe; 16-flue; 17-exhanst gas outlet; 18-airtight valve; 19-collection ash silo; 20-shell up-hole plate.
The specific embodiment
As shown in Figure 1, device of the present invention comprises: steam output pipe 1, tedge 2, down-comer 3, upper union 4, jacket pipe 5, lower union 6, heat pipe 7, gas approach 8, scraper plate 9, scraper plate tube connector 10, drum 11, deaerated water water inlet pipe 12, scraper plate driving mechanism 13, upper collecting chamber pipe 14, lower box collecting pipe 15, flue 16, exhanst gas outlet 17, airtight valve 18, collection ash silo 19.
As shown in Figure 1, the flue 16 of waste-heat recovery device is horizontally disposed.As heat exchange element, the heat pipe outside is light pipe or straight fins pipe to waste-heat recovery device with heat pipe, and the endotherm section of heat pipe 7 vertically is inserted in the flue 16, and the hypomere section of heat pipe 7 is in free state; The endotherm section outside of heat pipe 7 is provided with scraper plate 9, and scraper plate 9 is connected with scraper plate tube connector 10; Scraper plate tube connector 10 adopts the water-cooled steel pipe, establishes with heat pipe 7 parallel columns, and stretches out outside the flue 16, is in transmission connection with the scraper plate driving mechanism 13 that is arranged on outside the flue 16.Flue gas enters the flue 16 from gas approach 8, flows out from exhanst gas outlet 17 again.Simultaneously, the heat release section of heat pipe 7 and is inserted in the jacket pipe 5 outside flue.
As shown in Figure 1, 2, jacket pipe 5 seal weldings, jacket pipe 5 connects into the sheet tube bank by upper union 4 and lower union 6.The upper union 4 of tube bank is connected connections by steel pipe again with the upper collecting chamber pipe, the lower union 6 of tube bank is connected connection by steel pipe again with lower box collecting pipe, and the series winding of being restrained by multi-disc forms heat pipe evaporator.Lower box collecting pipe 15 connects down-comers 3, upper collecting chamber pipe 14 connects riser 2, and tedge 2, down-comer 3 are connected connection with drum.The interface of tedge 2 and drum 11 is above liquid level, and the interface of down-comer 3 and drum 11 is in the drum bottom.Deaerated water water inlet pipe 12 is connected connection with drum.Steam output pipe 1 is arranged on the top of drum 11.
As shown in Figure 1, collection ash silo 19 is established in flue 16 belows, and collection ash silo 19 arranges airtight valve 18 with flue 16 connectivity parts.
As shown in Figure 2, punch the hole on the upper union 4 in the jacket pipe tube bank and the lower union 6, many jacket pipes 5 of welding between upper union 4 and the lower union 6.The external diameter of heat pipe 7 is less than jacket pipe 5 internal diameters.Heat pipe 5 inserts in the upper and lower union hole, and places in the jacket pipe 5.Every tube bank is comprised of two unions and Duo Gen heat pipe.The endotherm section of heat pipe 5 passes shell up-hole plate 20 access arrangement flues.
As shown in Figure 1, when the rotary hearth furnace flue gas that contains large amount zinc oxide, its temperature is that 750 ℃, flow are 120,000 Nm3/h, and through gas approach 8 accesss to plant, with heat pipe 7 heat exchange, flue-gas temperature is down to 250 ℃, again by exhanst gas outlet 17 bleeders.The heavy knot of the zinc oxide dust of contained a large amount of high bondings is on the heat pipe surface in the flue gas.The scraper plate 9 that install in the heat pipe outside moves up and down under the drive of scraper plate driving mechanism 13, and the dust on heat pipe surface is fallen in the collection ash silo 19.During normal operation, the airtight valve 18 of collection ash silo top is opened, and the knot ash under the heat pipe cleaning falls into the collection ash silo.Regularly close airtight valve 18, extract ash bucket out, be loaded on ash bucket behind the deashing.
Meanwhile, 104 ℃ deaerated water enters drum 11 by deaerated water water inlet pipe 12; In drum, enter lower box collecting pipe 15 by down-comer 3; Enter the lower union 6 of every tube bank from lower box collecting pipe 15, enter again jacket pipe 5; In jacket pipe 5, deaerated water absorbs the heat that heat pipe 7 transmits, and water becomes steam in jacket pipe 5 interior evaporations.Steam enters upper collecting chamber pipe 14 by upper union 4, enters drum 11 by tedge 2 again.Final pressure is 1.6Mpa, and temperature is that 204 ℃ steam is delivered to the user from steam output pipe 1.The about 35t/h of the steam production of this device.This device heat exchange amount is 26000KW.Be equivalent to reclaim the energy of 26000KW.
Claims (6)
1. one kind contains high bonding dust device for recovering waste heat of high-temperature flue, comprises horizontally disposed flue, heat exchanger, jacket pipe and drum; It is characterized in that: described heat exchanger comprises some heat pipes, and heat pipe vertically arranges, and the shell orifice plate that its endotherm section passes flue is placed in the equipment flue, and it is not fixing, be in free state, the heat release section of heat pipe is arranged on outside the flue, and inserts respectively in the jacket pipe; Described jacket pipe connects into the sheet tube bank by upper union and lower union, and the sheet tube bank is integrated by upper collecting chamber pipe and lower box collecting pipe series winding again; Upper collecting chamber pipe and lower box collecting pipe are communicated with drum by tedge and down-comer respectively; Scraper plate is equipped with in the endotherm section outside of heat pipe, and described scraper plate and transmission device are in transmission connection, and can move up and down in overall along heat pipe outer surface under actuator drives.
2. according to claim 1ly contain high bonding dust device for recovering waste heat of high-temperature flue, it is characterized in that: described scraper plate links to each other with transmission device by the water-cooled steel pipe, and this water-cooled steel pipe and heat pipe parallel columns are established.
3. according to claim 1ly contain high bonding dust device for recovering waste heat of high-temperature flue, it is characterized in that: the bottom of described heat exchanger is provided with the collection ash silo, and collection ash silo top is provided with airtight valve, integrates ash silo as the drawer type ash bucket.
4. a right to use requires the high bonding dust high-temperature flue gas exhaust heat recovering method that contains that 1,2 or 3 described devices realize, it is characterized in that: may further comprise the steps,
(1) high-temperature flue gas enters in the horizontally disposed flue, and high-temperature flue gas and the heat pipe heat-absorbing section heat exchange that is arranged in the flue descend high-temperature flue-gas, and the high bonding dust in the high-temperature flue gas sinks knot on the heat pipe surface simultaneously;
(2) deaerated water enters in the jacket pipe from drum by down-comer, absorbs the heat release section liberated heat of heat pipe, produces steam; Steam enters drum by tedge again;
(3) be arranged at the scraper plate in the endotherm section outside of every heat pipe, move up and down along the heat pipe heat-absorbing section outer surface, in the collection ash silo of heavy knot below the high bonding dust on heat pipe heat-absorbing section surface scrapes heat exchanger.
5. according to claim 4ly contain high bonding dust device for recovering waste heat of high-temperature flue, it is characterized in that: each step is specific as follows,
(1) high-temperature flue gas that contains 1200-700 ℃ in a large amount of high bonding dust enters evaporimeter and heat pipe heat exchanging, and behind the heat pipe absorbing heat, flue-gas temperature drops to 200 ℃ and flowed out by evaporator outlet;
(2) deaerated water enters in the evaporator water sleeve pipe, and absorbing heat pipe liberated heat generation temperature is 110 ℃-275 ℃, and pressure is the following steam of 6Mpa;
(3) heavy knot is at the high bonding dust on heat pipe surface, and the scraper plate that is regularly moved up and down scrapes in the collection ash silo of evaporimeter below.
6. according to claim 4 or 5 describedly contain high bonding dust device for recovering waste heat of high-temperature flues, it is characterized in that: after collection ash silo ash was full, the seal valve between closure set ash silo and the heat exchanger was extracted ash bucket out; Behind the deashing, again ash bucket is loaded onto, opened seal valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012105274992A CN102927548A (en) | 2012-12-10 | 2012-12-10 | Afterheat recycling device and method of high temperature flue gas containing high adhesive dust |
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| CN2012105274992A CN102927548A (en) | 2012-12-10 | 2012-12-10 | Afterheat recycling device and method of high temperature flue gas containing high adhesive dust |
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| CN2012105274992A Pending CN102927548A (en) | 2012-12-10 | 2012-12-10 | Afterheat recycling device and method of high temperature flue gas containing high adhesive dust |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512412A (en) * | 2013-09-30 | 2014-01-15 | 西安交通大学 | U-shaped heat pipe heat exchange elements and U-shaped heat pipe heat exchanger integrated with electrostatic dust collector |
| CN103968674A (en) * | 2014-05-20 | 2014-08-06 | 莱芜钢铁集团有限公司 | Medium and low temperature smoke online pre-ash-removal device of rotary hearth furnace |
| CN104279540A (en) * | 2013-07-10 | 2015-01-14 | 刘英聚 | Waste heat recovery method and waste heat recovery device |
| CN107238205A (en) * | 2017-07-27 | 2017-10-10 | 江苏丰鑫源环保集团有限公司 | A kind of heat reclamation device of heat conducting oil boiler |
| CN107830754A (en) * | 2017-11-28 | 2018-03-23 | 苏州顺为环境科技有限公司 | The high-temperature flue gas cooling device that can voluntarily clear up |
| CN111609752A (en) * | 2020-06-04 | 2020-09-01 | 蔡志雄 | System for utilize conduction oil to retrieve industrial waste gas waste heat |
| CN113739585A (en) * | 2020-05-28 | 2021-12-03 | 湖南中冶长天节能环保技术有限公司 | Full-film type wall waste heat boiler |
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| JP2000146464A (en) * | 1998-11-09 | 2000-05-26 | Junichi Shitamachi | Heat exchanger |
| CN201246987Y (en) * | 2008-06-20 | 2009-05-27 | *** | Phase-change heat exchanger |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279540A (en) * | 2013-07-10 | 2015-01-14 | 刘英聚 | Waste heat recovery method and waste heat recovery device |
| CN103512412A (en) * | 2013-09-30 | 2014-01-15 | 西安交通大学 | U-shaped heat pipe heat exchange elements and U-shaped heat pipe heat exchanger integrated with electrostatic dust collector |
| CN103512412B (en) * | 2013-09-30 | 2015-11-25 | 西安交通大学 | U-shaped heat pipe heat exchanging component and the U-shaped heat exchange of heat pipe integrated with electrostatic precipitator |
| CN103968674A (en) * | 2014-05-20 | 2014-08-06 | 莱芜钢铁集团有限公司 | Medium and low temperature smoke online pre-ash-removal device of rotary hearth furnace |
| CN103968674B (en) * | 2014-05-20 | 2015-10-07 | 莱芜钢铁集团有限公司 | The online pre-deashing device of low-temperature flue gas in a kind of rotary hearth furnace |
| CN107238205A (en) * | 2017-07-27 | 2017-10-10 | 江苏丰鑫源环保集团有限公司 | A kind of heat reclamation device of heat conducting oil boiler |
| CN107830754A (en) * | 2017-11-28 | 2018-03-23 | 苏州顺为环境科技有限公司 | The high-temperature flue gas cooling device that can voluntarily clear up |
| CN113739585A (en) * | 2020-05-28 | 2021-12-03 | 湖南中冶长天节能环保技术有限公司 | Full-film type wall waste heat boiler |
| CN111609752A (en) * | 2020-06-04 | 2020-09-01 | 蔡志雄 | System for utilize conduction oil to retrieve industrial waste gas waste heat |
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Application publication date: 20130213 |