CN104419796A - All-welding counterflow corrugated plate air/gas preheater - Google Patents

All-welding counterflow corrugated plate air/gas preheater Download PDF

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Publication number
CN104419796A
CN104419796A CN201310413441.XA CN201310413441A CN104419796A CN 104419796 A CN104419796 A CN 104419796A CN 201310413441 A CN201310413441 A CN 201310413441A CN 104419796 A CN104419796 A CN 104419796A
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CN
China
Prior art keywords
plate
air
gas
heat exchange
exchange unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310413441.XA
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Chinese (zh)
Inventor
洪晓波
唐伟杰
胡宗洪
蒲光荣
孙维国
简从兰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI LALLEEN ENGINEERING TECHNOLOGY Co Ltd
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SHANGHAI LALLEEN ENGINEERING TECHNOLOGY Co Ltd
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Application filed by SHANGHAI LALLEEN ENGINEERING TECHNOLOGY Co Ltd filed Critical SHANGHAI LALLEEN ENGINEERING TECHNOLOGY Co Ltd
Priority to CN201310413441.XA priority Critical patent/CN104419796A/en
Publication of CN104419796A publication Critical patent/CN104419796A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an all-welding counterflow corrugated plate air/gas preheater. The all-welding counterflow corrugated plate air/gas preheater comprises a main heat exchange unit, wherein a smoke gas inlet and an air/gas outlet are formed in one end of the main heat exchange unit, an air/gas inlet and a smoke gas outlet are formed in the other end, the smoke gas inlet is formed on the periphery of the air/gas outlet, and the air/gas inlet is formed on the periphery of the gas outlet. The all-welding counterflow corrugated plate air/gas preheater disclosed by the invention realizes counterflow heat transfer of a heat transfer medium and improves heat transfer efficiency; the medium flow channel is a vertical channel, and no backfolding exists, so that flow resistance of the medium and pressure drop of equipment are effectively reduced; and as the heat transfer efficiency is improved, the volume and the occupied area of the equipment are obviously reduced.

Description

The reverse-flow waved plate air/gas preheater of a kind of full weldering
Technical field
The present invention relates to heat exchanger, specifically, is entirely weld reverse-flow waved plate air/gas preheater about one.
Background technology
Improving wind-warm syndrome is reduce blast furnace coke ratio the most cost-effective measure, and the not high reason of blast furnace air temperature mainly hotblast stove lacks coal gas and the high temperature combustion air of higher calorific value, and theoretical combustion temperature is not high.Want to improve wind-warm syndrome, just need the blast furnace gas to hot blast stove burning and combustion air preheating, to improve theoretical combustion temperature, and then improve wind-warm syndrome.
Current Steel Plant mainly adopt shell and tube heat exchanger, heat pipe-type (heating agent) interchanger and plate-type heat exchanger to utilize hot-blast stove fume waste heat preheated air/coal gas.Wherein, shell and tube gas preheater, due to shortcomings such as poor, the easy to wear burn into of heat transfer property are bulky, involve great expense, the easy dust stratification of heat transfer tube is dirty, maintenance capacity is large, work-ing life is short, is applied fewer and feweri in Iron And Steel Industry.And heat pipe-type (heating agent) gas preheater exists the factors such as heating agent loss, venting, heat pipe can lose efficacy because vacuum tightness declines, and work-ing life is short, and heat transfer efficiency is low, and resistance to elevated temperatures is poor, and dust stratification is the shortcoming such as easy-clear not.Even if the plate-type heat exchanger that result of use is best at present, because its structure limit, is cross flow heat exchange between heat-transfer medium, greatly reduces heat exchange efficiency.
Summary of the invention
Object of the present invention is exactly the deficiency existed for the existing heat-exchange equipment of blast furnace ironmaking industry, thus a kind of heat-transfer medium adverse current is provided, heat transfer efficiency is high, pressure drop is low, easy cleaning, cost are low full weldering reverse-flow waved plate air/gas preheater.
For achieving the above object, the present invention is by the following technical solutions:
The reverse-flow waved plate air/gas preheater of a kind of full weldering, comprise a main heat exchange unit, one end of this main heat exchange unit arranges a gas approach and air/gas outlet, the other end then arranges an air/gas import and an exhanst gas outlet, wherein, described gas approach is arranged at the periphery of described air/gas outlet, and described air/gas import is arranged at the periphery of described exhanst gas outlet.
Wherein, described main heat exchange unit comprises a unit framework, is disposed with crossbeam, some heat exchange unit modules, bellow expansion joint and sealing plate in this unit framework from bottom to top.
According to an embodiment, the end plate that described heat exchange unit module is arranged by several plate pipes and the upper and lower two ends of plate pipe forms.
According to another embodiment, described plate pipe stitches weldering by two phases heat transferring plate across a certain distance and forms, and several plate pipes are arranged in parallel, and the heat transferring plate at each plate pipe mouth of pipe place is to bending outside the mouth of pipe.
Preferably, described end plate inner edge bending is prionodont, and end plate inner edge is connected with the mouth of pipe free edge full weld of each tube sheet of arranged in parallel.
According to the present invention, described heat exchange unit module forms exhaust gases passes and air/gas passage in plate both sides, by heat transferring plate and sealing plate full weld by exhaust gases passes with air/gas passage is completely isolated comes.
According to a preferred embodiment, described heat exchange unit module is divided on two groups of crossbeams be placed in side by side in unit framework, and the end plate full weld of each group heat exchange unit module connects.Be welded with bellow expansion joint between the upside of the plate pipe of each group of heat exchange unit module and unit framework, the upper end of this expansion joint is added with sealing plate.
Further, described heat transferring plate entirety is in hexagon, and end face adopts hypotenuse bending, and upper and lower is trilateral guiding region, and centre is rectangle heat transfer zone, and rectangle heat transfer zone plate lateral cross section and longitudinal cross-section are burr, ripple that dimpled grain is alternate.
Full weldering of the present invention reverse-flow waved plate air/gas preheater has following beneficial effect:
1) preheater achieves the countercurrent heat-transfer of heat-transfer medium, improves heat transfer efficiency;
2) medium runner is vertical channel, does not exist and turns back, and effectively reduces the resistance to flow of medium and the Pressure Drop of equipment;
3) due to the raising of heat transfer efficiency, volume and the floor space of equipment obviously reduce.
Accompanying drawing explanation
Fig. 1 is the example structure schematic diagram that the present invention proposes.
Fig. 2 is embodiment of the present invention heat exchange unit modular structure schematic diagram.
Fig. 3 is the I place enlarged diagram of Fig. 2.
Fig. 4 is the present embodiment main heat exchange unit bellow expansion joint scheme of installation.
Fig. 5 is the present embodiment main heat exchange unit heat transferring plate structural representation.
Fig. 6 is Fig. 5 A-A diagrammatic cross-section.
Embodiment
Below in conjunction with accompanying drawing, be described in further detail with the structure of specific embodiment to full weldering of the present invention reverse-flow waved plate air/gas preheater.Should be understood that following examples only for illustration of the present invention but not for limiting scope of the present invention.
As shown in Figure 1, for the structural representation of full weldering of the present invention reverse-flow waved plate air/gas preheater, this air/gas preheater comprises a main heat exchange unit 5, the upper end of this main heat exchange unit 5 arranges a gas approach 1 and air/gas outlet 4, lower end then arranges air/gas import 3 and an exhanst gas outlet 2, wherein, described gas approach 1 is arranged at the periphery of described air/gas outlet 4, described air/gas import 3 is arranged at the periphery of described exhanst gas outlet 2, that is: air/gas outlet 4 is enclosed within gas approach 1, and exhanst gas outlet 2 is enclosed within air/gas import 3, the passage that flows through of the recuperated gas of formation like this is: the flue gas of high temperature enters main heat exchange unit 5 from the gas approach 1 of top, then exhanst gas outlet 2 is from below discharged, the air/gas of low temperature then air/gas import 3 from below enters main heat exchange unit 5, with adverse current and under high-temperature flue gas in main heat exchange unit 5, export 4 from the air/gas of top after heat exchange discharge.In air/gas preheater, so form exhaust gases passes and the air/gas passage of vertically countercurrent flow, improve heat transfer efficiency by countercurrent heat-transfer.
Described main heat exchange unit 5 comprises a unit framework 55, is disposed with crossbeam 54, some heat exchange unit modules 51, bellow expansion joint 52 and sealing plate 53 in this unit framework 55 from bottom to top.
Fig. 2 is the structural representation of the hot cell module 51 that the present embodiment changes.In figure, the end plate 513 that described heat exchange unit module 51 is arranged by several plate pipes 511 and plate pipe about 511 two ends forms, wherein, described plate pipe 511 stitches weldering by two phases heat transferring plate 512 across a certain distance and forms, several plate pipes 511 are in arranged in parallel, and the heat transferring plate 512 at each plate pipe 511 mouth of pipe place is to bending outside the mouth of pipe; As shown in the close-up schematic view of Fig. 3, described end plate 513 inner edge bending is prionodont, and end plate 513 inner edge is connected with the mouth of pipe free edge full weld of each tube sheet 511 of arranged in parallel, heat exchange unit module 51 forms exhaust gases passes 514 and air/gas passage 515 in plate both sides, by heat transferring plate 512 and sealing plate 53 full weld by exhaust gases passes 514 with air/gas passage 515 is completely isolated comes.
Fig. 4 is the scheme of installation of the bellow expansion joint 52 of the main heat exchange unit 5 of the present embodiment.In figure, heat exchange unit module 51 is divided on two groups of crossbeams 54 be placed in side by side in unit framework 55, end plate 513 full weld of each group of heat exchange unit module 51 connects, bellow expansion joint 52 is welded with between the upside of the plate pipe 511 of each group of heat exchange unit module 51 and unit framework 55, the upper end of this expansion joint 52 is added with sealing plate 53, and the use of expansion joint 52 can make up the uneven temperature stress caused of thermal expansion of plate bundle and casing.
Further, Fig. 5 is the structural representation of the heat transferring plate 512 of the present embodiment main heat exchange unit 5, and Fig. 6 is the diagrammatic cross-section along A-A in Fig. 5.In figure, heat transferring plate 512 entirety is in hexagon, and end face adopts hypotenuse bending, and upper and lower is trilateral guiding region, and centre is rectangle heat transfer zone, and rectangle heat transfer zone plate lateral cross section and longitudinal cross-section are burr 516, ripple that dimpled grain 517 is alternate.After two panels heat transferring plate 512 forms plate pipe, the plate line that burr 516, dimpled grain 517 are alternate makes the channel cross-section of gas change, and easily forms turbulent flow, improves the heat transfer property of fluid.

Claims (9)

1. one kind is welded reverse-flow waved plate air/gas preheater entirely, it is characterized in that: described air/gas preheater comprises a main heat exchange unit, one end of this main heat exchange unit arranges a gas approach and air/gas outlet, the other end then arranges an air/gas import and an exhanst gas outlet, wherein, described gas approach is arranged at the periphery of described air/gas outlet, and described air/gas import is arranged at the periphery of described exhanst gas outlet.
2. the reverse-flow waved plate air/gas preheater of full weldering as claimed in claim 1, it is characterized in that: described main heat exchange unit comprises a unit framework, in this unit framework, be disposed with crossbeam, some heat exchange unit modules, bellow expansion joint and sealing plate from bottom to top.
3. the reverse-flow waved plate air/gas preheater of full weldering as claimed in claim 2, is characterized in that: the end plate that described heat exchange unit module is arranged by several plate pipes and the upper and lower two ends of plate pipe forms.
4. the reverse-flow waved plate air/gas preheater of full weldering as claimed in claim 3, it is characterized in that: described plate pipe stitches weldering by two phases heat transferring plate across a certain distance and forms, several plate pipes are arranged in parallel, and the heat transferring plate at each plate pipe mouth of pipe place is to bending outside the mouth of pipe.
5. the reverse-flow waved plate air/gas preheater of full weldering as claimed in claim 3, it is characterized in that: described end plate inner edge bending is prionodont, and end plate inner edge is connected with the mouth of pipe free edge full weld of each tube sheet of arranged in parallel.
6. the reverse-flow waved plate air/gas preheater of full weldering as claimed in claim 2, it is characterized in that: described heat exchange unit module forms exhaust gases passes and air/gas passage in plate both sides, by heat transferring plate and sealing plate full weld by exhaust gases passes with air/gas passage is completely isolated comes.
7. the reverse-flow waved plate air/gas preheater of full weldering as claimed in claim 2, is characterized in that: heat exchange unit module is divided on two groups of crossbeams be placed in side by side in unit framework, and the end plate full weld of each group heat exchange unit module connects.
8. the reverse-flow waved plate air/gas preheater of full weldering as claimed in claim 2, is characterized in that: be welded with bellow expansion joint between the upside of the plate pipe of each group heat exchange unit module and unit framework, the upper end of this expansion joint is added with sealing plate.
9. the reverse-flow waved plate air/gas preheater of full weldering as claimed in claim 4, it is characterized in that: described heat transferring plate entirety is in hexagon, end face adopts hypotenuse bending, upper and lower is trilateral guiding region, centre is rectangle heat transfer zone, and rectangle heat transfer zone plate lateral cross section and longitudinal cross-section are burr, ripple that dimpled grain is alternate.
CN201310413441.XA 2013-09-11 2013-09-11 All-welding counterflow corrugated plate air/gas preheater Pending CN104419796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310413441.XA CN104419796A (en) 2013-09-11 2013-09-11 All-welding counterflow corrugated plate air/gas preheater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310413441.XA CN104419796A (en) 2013-09-11 2013-09-11 All-welding counterflow corrugated plate air/gas preheater

Publications (1)

Publication Number Publication Date
CN104419796A true CN104419796A (en) 2015-03-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105157457A (en) * 2015-10-26 2015-12-16 柳明 Plate-shell type heat exchanger
CN111661888A (en) * 2020-06-15 2020-09-15 方诺传热系统(江苏)有限公司 Falling film type air cooler based on evaporative air cooling technology and wastewater treatment process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105157457A (en) * 2015-10-26 2015-12-16 柳明 Plate-shell type heat exchanger
CN111661888A (en) * 2020-06-15 2020-09-15 方诺传热系统(江苏)有限公司 Falling film type air cooler based on evaporative air cooling technology and wastewater treatment process

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Application publication date: 20150318

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