CN102721296A - Rotatable steam fan heater - Google Patents
Rotatable steam fan heater Download PDFInfo
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- CN102721296A CN102721296A CN2012100664516A CN201210066451A CN102721296A CN 102721296 A CN102721296 A CN 102721296A CN 2012100664516 A CN2012100664516 A CN 2012100664516A CN 201210066451 A CN201210066451 A CN 201210066451A CN 102721296 A CN102721296 A CN 102721296A
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Abstract
The invention relates to the filed of heat exchangers, and particularly discloses a rotatable steam fan heater, which includes a fan heater casing, wherein a plurality of symmetrically arranged inlet headers and outlet headers are arranged at the two ends of the fan heater casing respectively; a finned tube group is connected and mounted between the inlet headers and the outlet headers respectively; steam inlet hollow shafts communicated with the inlet headers are welded on the inlet headers; and drainage hollow shafts communicated with the outlet headers are welded on the outlet headers. The rotatable steam fan heater has a simple structure, is convenient to use, safe and reliable, can be used for automatically cleaning sundries adhered onto a heating surface, facilitates reduction of the resistance to an air duct, and reduces the energy consumption.
Description
(1) technical field
The present invention relates to heat exchanger field, particularly a kind of rotatable steam steam air heater.
(2) background technology
The boiler that adopts rotary regenerative air preheater is to avoid a series of unfavorable factors that influence the safe and economical boiler operation such as air preheater cold end corrosion, rotor deformation, heat accumulating element obstruction, the increase of leaking out, and air heating apparatus all is set.
Boiler rotary regenerative air preheater heats cold air has two kinds of means at present, and the one, hot blast recirculation, the 2nd, the steam steam air heater is set.The subject matter that adopts hot blast recirculation to exist is that Fan Selection is big, and the high temperature season fan operation is less economical, and it is limited that hot blast recirculation simultaneously adds the hot-air temperature rise, in the extremely low area of environment temperature, like north China, all selects steam steam air heater heating cold wind for use.
The steam steam air heater places the blower fan air channel, in low temperature season heating cold wind, is reaching 7,8 months not between the operating period; Can increase the resistance and the blower fan power consumption in air channel, the air that sucks blower fan simultaneously contains impurity, after the thicker impurity of part gets into the air channel; On the finned tube group of most of deposition attached to steam steam air heater windward side; Accumulated impurity deposition in time is more and more, and the steam air heater resistance can be increasing, and the blower fan power consumption increases; The duct resistance variation, characteristic curve of air duct also will change, and corresponding the variation takes place in the operating point of blower fan, when the blower fan operating point falls into unstable region, with a series of accidents that influence the safe and economical boiler operation such as the surge of generation blower fan, the reductions of exerting oneself.
Adopt the power plant boiler unit of steam steam air heater preheating cold air, the blower fan power consumption is high, and often surge is to have more general problem at present.
(3) summary of the invention
The present invention provides a kind of rotary regenerative air heater safety, economical operation needs of both having adapted to, the rotatable steam steam air heater that can reduce blower fan power consumption and duct resistance again and avoid the blower fan surge in order to remedy the deficiency of prior art.
The present invention realizes through following technical scheme:
A kind of rotatable steam steam air heater; Comprise the steam air heater housing; Steam air heater housing two ends are respectively arranged with the inlet header and the outlet header of several symmetric arrays; Be connected and installed with the finned tube group between inlet header and the outlet header, be welded with the admission hollow shaft that is communicated with it on the inlet header, be welded with the hydrophobic hollow shaft that is communicated with it on the outlet header; It is characterized in that: the cross section parallelogram of said inlet header, outlet header and finned tube group; The minor face of parallelogram and the angle of short diagonal are more than or equal to 90 degree, and the center line of inlet header, outlet header, finned tube group, admission hollow shaft, hydrophobic hollow shaft is same straight line, and inlet header, outlet header, finned tube group, admission hollow shaft and hydrophobic hollow shaft constitute heat-exchanging component together; Every steam air heater is made up of one to four heat-exchanging component, closely arranges when adjacent heat-exchanging component places same plane.
For ease of hydrophobic discharging, the steam air heater entire arrangement is taked vertical or inclination dual mode, and concrete the layout according to on-the-spot air channel is actual confirmed; For guaranteeing to expand freely, reserve the expansion clearance at the steam air heater steam admission side; Heat-exchanging component is installed in the steam steam air heater housing through spring bearing and guide bearing, can rotate flexibly.There are the different of essence in this with the fixed steam steam air heater that uses at present.
Said admission hollow shaft and hydrophobic hollow shaft adopt heavy wall 20g seamless steel pipe or other materials that meets the demands; Make the axle journal and the shaft shoulder on the steel pipe; Bearing is installed on the hollow shaft, and wherein the admission hollow shaft is installed guide bearing, and hydrophobic hollow shaft is installed spring bearing; Admission hollow shaft and guide bearing adopt matched in clearance, and hydrophobic hollow shaft and spring bearing adopt interference fits or interference fit.Hollow axle end is made groove, is convenient to the welding of hollow shaft and import and export flange and import and export header.Admission hollow shaft size can get into influent header and not influence on-the-spot fitting operation that expansion is as the criterion with heat-exchanging component with less resistance and heat loss with steam; Hydrophobic hollow shaft size with hydrophobic can discharge outlet header fully and not influence on-the-spot fitting operation be as the criterion; For making things convenient for processing and fabricating, import and export hollow shaft size can be consistent; Guide bearing chock and supporting bearing base adopt bolt to be mounted on the steam air heater housing; Consider heat-exchanging component weight; Fixing can adopt of supporting bearing base on housing is welded to connect, because heat-exchanging component weight is lighter, bearing block adopts foundry goods, welding steel part all can.
Said admission hollow shaft and hydrophobic hollow shaft termination are welded with inlet flange and outlet(discharge) flange respectively; Inlet flange is connected with steam inlet pipe; Outlet(discharge) flange is connected with drain pipe, and for adapting to the rotational angle needs, flange adopts several kinds of specifications such as 4 holes, 8 holes, 12 holes, 16 holes are uniformly distributed with.Be the convenient steam air heater heat-exchanging component that rotates, can also can make the specific purpose tool operation at admission hollow shaft or hydrophobic hollow shaft side flange welding operation handle.
The effect of admission hollow shaft is: as steam wireway and the rotating shaft that guide bearing is installed, the effect of hydrophobic hollow shaft is: as hydrophobic delivery pipe and the rotating shaft that spring bearing is installed; The effect of import and export flange is to connect steam inlet pipe and white-out water pipe, the part of installing as the heat-exchanging component rotary operators simultaneously of taking root; The effect of spring bearing and bearing block is to carry the weight of heat-exchanging component and guarantee that heat-exchanging component reliably rotates; The effect of guide bearing and bearing block is to guarantee that heat-exchanging component reliably rotates; Compensation is also offset the distortion that heat-exchanging component produces; The axis of guide, bearing block cooperate with the admission hollow shaft, and through a slot reservation, the compensation heat-exchanging component expands.
Said steam air heater housing adopts segmental structure (also can adopt overall structure), flange to connect; Integral body is frame structure, and the housing width is to be as the criterion more than or equal to import and export header length, and the steam air heater housing adopts flange to be connected with the air channel; The steam air heater housing can adopt the Q235 material; Adopt the soft sealing material sealing between flange, for strengthening steam air heater housing rigidity, impartial at interval horizontal, vertical, oblique reinforcement distributes on housing; On (two sides) housing of installation site symmetry, open the axis hole that pierces into vapour hollow shaft, hydrophobic hollow shaft respectively; The hop count of (every face is opened axis hole) housing is corresponding with heat-exchanging component quantity; Even distribution bolt hole is used to install and fix supporting shaft holder and guide bearing chock bolt around the axis hole; For preventing to leak out, the filling soft sealing material at the axis hole place; Outside the steam air heater housing, be welded with a device for hoisting, be used for on-the-spot and hang.
The steam air heater housing mainly acts on: support and rotate heat-exchanging component and constitute the air channel.
Said import and export header adopts 20g steel plate or other materials that meets the demands, and steel plate thickness is confirmed according to bearing steam pressure and header resistance to deformation rigidity; Header is made up of inner end plate, outer end plate, header barrel etc. respectively; The header barrel can adopt folder integral body to fold into parallelogram sturcutre, and the joint welding also can adopt steel plate to be welded into parallelogram sturcutre.
For making steam evenly be full of each finned tube as far as possible; The place, steam inlet of said inlet header adds current equalizer; For strengthening import and export header rigidity; Inlet header and outlet header inside all are welded with the bracing reinforcement muscle, and at its acute angle place welding arc sealing plate or directly adopt the arc transition to connect the header barrel, to reduce the concentrated stress at header acute angle place.
Import and export header outer end plate center has circular hole, and circular hole size and admission hollow shaft, hydrophobic hollow shaft internal diameter are consistent, are used for conducting header and hollow shaft, import and export header outer end plate respectively with being connected of admission hollow shaft and hydrophobic hollow shaft; Number row circular hole is arranged in the stagger arrangement of import and export header inner end plate, and circular hole quantity is consistent with finned tube quantity, and the circular hole size is consistent or bigger with the finned tube outer diameter of steel pipes, so that finned tube and inner end plate welding.
The whole parallelogram structure of import and export header is arranged closely when guaranteeing that adjacent heat-exchanging component places same plane, does not have obvious gap; Parallelogram minor face and short diagonal angle must be more than or equal to 90 °.
The inlet header effect is with steam uniform distribution to finned tube group, and the outlet header effect is that collection is hydrophobic, and the import and export header while is as the transition piece of finned tube group and admission hollow shaft and hydrophobic hollow shaft.
Said finned tube group is the critical piece that the steam steam air heater carries out heat exchange; Its heat exchange area is confirmed by calculating according to actual needs; Heat exchange pipe racks fin mainly is in order to increase heat exchange area, improves heat exchange efficiency, and fin tube core pipe can adopt 20g seamless steel pipe or other to satisfy the metal tube of material needs; Fin can adopt aluminium or the excellent metal material of other heat exchange properties; The pipe bond pads is connected in the circular hole of import and export header inner end plate stagger arrangement layout, and finned tube group parallelogram arranges that parallelogram minor face and short diagonal angle must be more than or equal to 90 °.
Said heat-exchanging component, its import and export header center, finned tube group switching centre, admission hollow shaft axial line, hydrophobic hollow shaft axial line are on the same straight line, and heat-exchanging component is supported on the steam air heater housing through bearing and bearing block, can rotate flexibly.For strengthening the assembly rigidity, be connected with shaped steel between said inlet header and the outlet header, shaped steel forms the finned tube group and surrounds stiffening frame, adds the comb shape locator card on the finned tube group, to avoid the distortion of finned tube group.
On the said steam air heater housing position indicator is installed; Admission hollow shaft or hydrophobic hollow shaft are marked with heat-exchanging component operation position and withdraw from a steel seal mark, and direction board on the shell position and the angle on the hollow shaft indicate the tram of joint instructions heat-exchanging component together; Be provided with the heat exchanger assembly limiting plate in the steam air heater housing, be used to limit the position of finned tube group, avoid occurring rotating too much.
When the steam steam air heater put into operation, the wide face of heat-exchanging component was put position (similar plate washer door places closed condition), vertical position with wind direction; When the steam steam air heater is out of service, heat-exchanging component is rotated 90 °, wide face is put air channel parallel position (similar baffle door is put full-gear); The foreign material that are difficult to clear up of the long-term deposition in steam air heater finned tube windward side; Can be through the steam air heater heat-exchanging component being turned to 90 ~ 180 ° of positions (cleaning position); Rely on the cleaning of blast automatic sequence, the foreign material in the steam air heater move and are attached to the air preheater cold junction, rely on the air-introduced machine negative pressure; Bring foreign material into deduster and remove (foreign material are less relatively, can the safe operation of boiler do not impacted).
Clearly, when steam air heater puts into operation, can be used as conventional steam steam air heater and normally use; When the steam steam air heater was out of service, the air quantity flow area was multiplied, and running resistance reduces significantly, and the blower fan power consumption reduces, and the economy of fan operation and reliability improve; When steam steam air heater finned tube group occlusion resistance increases, the steam air heater heat-exchanging component is rotated to the cleaning position successively carry out the automatic sequence cleaning, reach and do not shut down the purpose that automatic cleaning foreign material do not influence use simultaneously, practice thrift maintenance cost.
To the phenomenon of blower fan low load with strong power, in the design phase, the blower fan model can suitably be selected little, reduces construction costs on the one hand, guarantees that blower fan is in the operation of efficient district simultaneously as far as possible.
The present invention is simple in structure, and is easy to use, safe and reliable, can clear up automatically attached to the foreign material on the heating surface, helps reducing duct resistance, cuts down the consumption of energy.
(4) description of drawings
Below in conjunction with accompanying drawing the present invention is further described.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is an A-A face generalized section shown in Figure 1;
Fig. 3 is vertical installment state figure of the present invention;
Fig. 4 is inclination installment state figure of the present invention.
Among the figure, 1 inlet flange, 2 guide bearings, 3 admission hollow shafts, 4 inlet headers, 5 finned tube groups, 6 steam air heater housings, 7 hydrophobic hollow shafts, 8 spring bearings, 9 outlet(discharge) flanges, 10 outlet headers, 11 limiting plates, 12 angles.
(5) specific embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.This embodiment comprises steam air heater housing 6; Steam air heater housing 6 two ends are respectively arranged with the inlet header 4 and outlet header 10 of several symmetric arrays; Be connected and installed with finned tube group 5 between inlet header 4 and the outlet header 10; Be welded with the admission hollow shaft 3 that is communicated with it on the inlet header 4; Be welded with the hydrophobic hollow shaft 7 that is communicated with it on the outlet header 10, the cross section parallelogram of said inlet header 4, outlet header 10 and finned tube group 5, the minor face of parallelogram and the angle of short diagonal 12 are more than or equal to 90 degree; The center line of inlet header 4, outlet header 10, finned tube group 5, admission hollow shaft 3, hydrophobic hollow shaft 7 is same straight line; Inlet header 4, outlet header 20, finned tube group 5, admission hollow shaft 3 and hydrophobic hollow shaft 7 constitute heat-exchanging component together, and every steam air heater is made up of one to four heat-exchanging component, closely arrange when adjacent heat-exchanging component places same plane; Said heat-exchanging component is installed on the steam air heater housing 6 through guide bearing 2 and spring bearing 8; Admission hollow shaft 3 is installed through matched in clearance with guide bearing 2; Hydrophobic hollow shaft 7 is installed through interference fits or interference fit with spring bearing 8, reserves the heat-exchanging component expansion clearance between the steam air heater housing 6 of inlet header 4 one sides and the guide bearing 2; Said admission hollow shaft 3 is welded with inlet flange 1 and outlet(discharge) flange 9 respectively with hydrophobic hollow shaft 7 terminations, and inlet flange 1 is connected with steam inlet pipe, and outlet(discharge) flange 9 is connected with drain pipe; Place, the steam inlet of said inlet header 4 adds current equalizer, and inlet header 4 all is welded with the bracing reinforcement muscle with outlet header 10 inside, and at its acute angle place welding arc sealing plate or directly adopt the arc transition to connect the header barrel; On the said steam air heater housing 6 position indicator is installed, admission hollow shaft 3 or hydrophobic hollow shaft 7 are marked with heat-exchanging component operation position and withdraw from a steel seal mark, are provided with the heat exchanger assembly limiting plate in the steam air heater housing 6; Be connected with shaped steel between said inlet header 4 and the outlet header 10, add the comb shape locator card on the finned tube group 5.
Heat-exchanging component admission hollow shaft 3 and hydrophobic hollow shaft 7 are pierced in the axis hole of steam air heater housing 6; Guide bearing 2 and bearing block, spring bearing 8 and bearing sleeve are put into admission hollow shaft 3 and hydrophobic hollow shaft 7; The bearing assembly that cover is installed is installed on the steam air heater shell 6; Steam air heater both sides shell plates is installed, in steam air heater inlet header 4 side bodies with in guide bearing 2 and the bearing block cavity, is stopped the hot expansion clearance of steam air heater, installation site direction board at the bearing block place; For avoiding heat-exchanging component to rotate dislocation, welded limiting piece 11 near the steam air heater housing 6 of inlet header 4 and outlet header 10.
After overall assembling is accomplished, rotate heat-exchanging component, eliminate the factor of rotating bite that causes, last welded and installed suction flange 1 and outlet(discharge) flange 9 should be guaranteed wherein a bolt hole and heat-exchanging component center line perpendicular quadrature fork during the flange welding.
Heat-exchanging component, steam air heater housing 6, guide bearing 2 (outsourcing) and bearing block, spring bearing 8 (outsourcing) and bearing block factory process are accomplished; And it is qualified in the factory-assembled debugging; Carry out debugging recording and corresponding apparatus mark; Install so that the user is on-the-spot, suction flange 1 is installed in user's field Welding with outlet(discharge) flange 9.
Operation: steam air heater is in exit status at high temperature season, and 5 wide of finned tube groups are parallel with wind direction, and when steam air heater came into operation, heat-exchanging component rotated 90 °, connected suction flange 1 and outlet(discharge) flange 9; Each heat-exchanging component direction of rotation should be consistent, for avoiding resistance to reduce system impacted, and steam steam air heater heat-exchanging component should carry out when rotating in proper order, and the unit operation personnel should adjust exerting oneself of blower fan in good time, do not allow to operate simultaneously several groups of heat-exchanging components.Operational motion should be slow, and the scene has the operations staff on the scene, and keep in touch strict surveillance blast, blower fan change in current with central control room.
The steam steam air heater can be arranged in blower fan outlet or inlet air channel, according to the air channel arrangement form, flows to according to the steam import and export, and steam air heater adopts following arrangement:
(1) when the horizontal arrangement of air channel, the steam steam air heater adopts vertical the layout, and steam is from top to bottom through heat-exchanging component, shown in accompanying drawing 3.
(2) when the air channel is vertically arranged, the steam steam air heater adopts and is in tilted layout, and steam passes through heat-exchanging component from height to hanging down, shown in accompanying drawing 4.
Claims (6)
1. rotatable steam steam air heater; Comprise steam air heater housing (6); Steam air heater housing (6) two ends are respectively arranged with the inlet header (4) and the outlet header (10) of several symmetric arrays; Be connected and installed with finned tube group (5) between inlet header (4) and the outlet header (10); Be welded with the admission hollow shaft (3) that is communicated with it on the inlet header (4); Be welded with the hydrophobic hollow shaft (7) that is communicated with it on the outlet header (10), it is characterized in that: the cross section parallelogram of said inlet header (4), outlet header (10) and finned tube group (5), the minor face of parallelogram and the angle of short diagonal (12) are more than or equal to 90 degree; The center line of inlet header (4), outlet header (10), finned tube group (5), admission hollow shaft (3), hydrophobic hollow shaft (7) is same straight line; Inlet header (4), outlet header (10), finned tube group (5), admission hollow shaft (3) and hydrophobic hollow shaft (7) constitute heat-exchanging component together, and every steam air heater is made up of one to four heat-exchanging component, closely arrange when adjacent heat-exchanging component places same plane.
2. rotatable steam steam air heater according to claim 1; It is characterized in that: said heat-exchanging component is installed on the steam air heater housing (6) through guide bearing (2) and spring bearing (8); Admission hollow shaft (3) and guide bearing (2) are installed through matched in clearance; Hydrophobic hollow shaft (7) and spring bearing (8) are installed through interference fits or interference fit, reserve the heat-exchanging component expansion clearance between the steam air heater housing (6) of inlet header (4) one sides and the guide bearing (2).
3. rotatable steam steam air heater according to claim 1; It is characterized in that: said admission hollow shaft (3) and hydrophobic hollow shaft (7) termination are welded with inlet flange (1) and outlet(discharge) flange (9) respectively; Inlet flange (1) is connected with steam inlet pipe, and outlet(discharge) flange (9) is connected with drain pipe.
4. rotatable steam steam air heater according to claim 1; It is characterized in that: the place, steam inlet of said inlet header (4) adds current equalizer; Inlet header (4) and outlet header (10) inside all are welded with the bracing reinforcement muscle, and at its acute angle place welding arc sealing plate or directly adopt the arc transition to connect the header barrel.
5. rotatable steam steam air heater according to claim 1; It is characterized in that: on the said steam air heater housing (6) position indicator is installed; Admission hollow shaft (3) or hydrophobic hollow shaft (7) are marked with heat-exchanging component operation position and withdraw from a steel seal mark, are provided with heat exchanger assembly limiting plate (11) in the steam air heater housing (6).
6. rotatable steam steam air heater according to claim 1 is characterized in that: be connected with shaped steel between said inlet header (4) and the outlet header (10), the finned tube group adds the comb shape locator card on (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100664516A CN102721296A (en) | 2012-03-14 | 2012-03-14 | Rotatable steam fan heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100664516A CN102721296A (en) | 2012-03-14 | 2012-03-14 | Rotatable steam fan heater |
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| Publication Number | Publication Date |
|---|---|
| CN102721296A true CN102721296A (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100664516A Pending CN102721296A (en) | 2012-03-14 | 2012-03-14 | Rotatable steam fan heater |
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| Country | Link |
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| CN (1) | CN102721296A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109622727A (en) * | 2018-12-26 | 2019-04-16 | 无锡易和精机科技有限公司 | A kind of crosscutting mold of dislocation |
| CN112179165A (en) * | 2020-09-30 | 2021-01-05 | 中国航空发动机研究院 | Heat exchanger core with double modes and heat exchanger |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2329862Y (en) * | 1998-02-27 | 1999-07-21 | 济南市压力容器厂 | Rotatable air heater |
| CN101576267A (en) * | 2009-06-09 | 2009-11-11 | 西安交通大学 | Rotational structure of boiler rotary air heater |
| CN201425315Y (en) * | 2009-04-29 | 2010-03-17 | 无锡市华通环保设备有限公司 | Energy-saving rotary louver-type steam air heater |
| CN201496986U (en) * | 2009-07-30 | 2010-06-02 | 山东泓奥电力科技有限公司 | Energy-saving anti-clogging air heater |
| CN201531899U (en) * | 2009-07-31 | 2010-07-21 | 张堂林 | Power station boiler dynamic air heater |
| CN201593802U (en) * | 2010-01-12 | 2010-09-29 | 李华民 | Energy-saving rotary fan heater |
| CN202532928U (en) * | 2012-03-14 | 2012-11-14 | 顾强 | Rotatable steam air heater |
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2012
- 2012-03-14 CN CN2012100664516A patent/CN102721296A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2329862Y (en) * | 1998-02-27 | 1999-07-21 | 济南市压力容器厂 | Rotatable air heater |
| CN201425315Y (en) * | 2009-04-29 | 2010-03-17 | 无锡市华通环保设备有限公司 | Energy-saving rotary louver-type steam air heater |
| CN101576267A (en) * | 2009-06-09 | 2009-11-11 | 西安交通大学 | Rotational structure of boiler rotary air heater |
| CN201496986U (en) * | 2009-07-30 | 2010-06-02 | 山东泓奥电力科技有限公司 | Energy-saving anti-clogging air heater |
| CN201531899U (en) * | 2009-07-31 | 2010-07-21 | 张堂林 | Power station boiler dynamic air heater |
| CN201593802U (en) * | 2010-01-12 | 2010-09-29 | 李华民 | Energy-saving rotary fan heater |
| CN202532928U (en) * | 2012-03-14 | 2012-11-14 | 顾强 | Rotatable steam air heater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109622727A (en) * | 2018-12-26 | 2019-04-16 | 无锡易和精机科技有限公司 | A kind of crosscutting mold of dislocation |
| CN112179165A (en) * | 2020-09-30 | 2021-01-05 | 中国航空发动机研究院 | Heat exchanger core with double modes and heat exchanger |
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Application publication date: 20121010 |