CN102644931A - Ash removal device for heat exchange pipe of tail flue of boiler - Google Patents
Ash removal device for heat exchange pipe of tail flue of boiler Download PDFInfo
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- CN102644931A CN102644931A CN2012101512493A CN201210151249A CN102644931A CN 102644931 A CN102644931 A CN 102644931A CN 2012101512493 A CN2012101512493 A CN 2012101512493A CN 201210151249 A CN201210151249 A CN 201210151249A CN 102644931 A CN102644931 A CN 102644931A
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- helical spring
- pull bar
- flue
- heat exchanger
- boiler
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Abstract
The invention relates to an ash removal device for a heat exchange pipe of a tail flue of a boiler, which comprises a helical spring and a pull rod. The axial direction of the pull rod is parallel to the extension and retraction direction of the helical spring; one end of the pull rod is connected with one end of the helical spring; the helical spring is wound outside the cleaned heat exchange pipe; the pull rod passes through the flue wall of the boiler; a first stop sealing plate is arranged on a rod section of the pull rod, which is positioned outside the flue wall; and a second stop sealing plate is arranged on a rod section of the pull rod, which is positioned inside the flue wall. According to the device disclosed by the invention, the accumulated dust attached onto the outer surface of the heat exchange pipe is removed by utilizing the relative motion of the helical spring along the axial direction of the outer wall of the heat exchange pipe, which is generated by the retracting and extending motion of the helical spring wound on the outer wall of the heat exchange pipe.
Description
Technical field
The invention belongs to industrial application, be specifically related to a kind of device that is used for boiler back end ductwork heat exchanger tube deashing and reach method for using based on this device.
Background technology
In coal-burning boiler; Heat exchanger such as economizer, air preheater is arranged in the back-end ductwork, and when being with grey flue gas through each heating surface, the part soot particle can deposit to and form dust stratification on the heating surface; Finally can cause exhaust gas temperature to rise like untimely effectively the cleaning; The thermal efficiency descends, and causes the corrosion of heating surface, influences economy, the security of boiler plant.Especially in incinerator, the back-end surfaces corrosion phenomenon is even more serious behind the dust stratification.How in time to handle most important to heat exchanger tube dust stratification in the back-end ductwork effectively to stable operation of the boiler.
The device that is applied in boiler heat exchanger tube deashing at present can be divided into sweeping type and oscillatory type substantially.Blowing method has steam soot blowing, compressed air soot-blowing, impulse soot blowing etc., and principle all is to use high velocity air impingement heat transfer pipe, heat-transfer surface that dust stratification is come off basically.Though these method effects obviously but equipment investment, operating cost are high, are not suitable for miniature boiler equipment, and these blow grey mode have must the blowing out cleaning, trouble such as the cycle of operation is long, power plant, factory are caused enormous economic loss; Oscillatory type utilizes the method for mechanical oscillation (impacting) to make the heating surface vibration, and dust stratification is taken away by flue gas after breaking away from wall, and method simply must blowing out not get final product deashing, but its power consumption is big and efficient is not high, and equipment is heavy.
Summary of the invention
Technical problem:The invention provides a kind of low cost, high efficiency, boiler back end ductwork heat exchanger tube deashing device easy to use.
Technical scheme:Boiler back end ductwork heat exchanger tube deashing device of the present invention; Comprise helical spring and pull bar, pull bar axially parallel with helical spring flexible direction, an end of pull bar is connected with a helical spring end; Helical spring is wrapped in the outside of institute's removing heat exchanger tube; Pull bar passes the walling of flue of place boiler, and the bar section that pull bar is positioned at the walling of flue outside is provided with the first baffle seal plate baffle plate, is positioned at the inboard bar section of walling of flue and is provided with the second baffle seal plate.
Among the present invention, pull bar can be one, and the end that helical spring is not connected with pull bar is fixed on walling of flue inside.
Among the present invention, pull bar is two, is connected to helical spring two ends.
Among the present invention, the end that pull bar is positioned at the walling of flue outside can be to be connected with retractor device, also can be to be connected with handle.
The helical spring of apparatus of the present invention is wrapped on the heat exchanger tube outer wall, and pull bar passes walling of flue, and it is fixing that helical spring does not have an end of cylinder lever connecting rod to be connected with heat exchanger tube other end walling of flue.Helical spring is influenced by the two ends pulling force under normal circumstances to be in extended state; When carrying out deashing work; Discharging pull bar makes helical spring one end no longer receive the influence of pulling force; Drawing pull bar moves reciprocatingly simultaneously, and helical spring is the axially reciprocal contractile motion of heat exchanger tube in the traction lower edge of pull bar, removes heat exchanger tube outer wall dust stratification; The first baffle seal plate, the second baffle seal plate are vertically fixed on the pull bar, and the distance between the two baffle seal plates has determined the helical spring displacement.When deashing finished, retractor device received Passive Control once more, once more helical spring was strained through pull bar.During off working state, the second baffle seal plate is close to the flue outer wall, plays sealing function.In order to improve the deashing ability, can helical spring be in the twice that length under the tension is controlled to be natural length.
When apparatus of the present invention are used; Can be that manually back and forth the stretching pull bar is removed the laying dust on the heat exchanger tube, also can be connected pull bar with retractor device, the piston rod in the retractor device can pull bar axially on left reciprocal stretching motion; Thereby the drive device action is removed the laying dust on the heat exchanger tube.Retractor device adopts the maturing appts of mechanical field, can be pneumatic, hydraulic pressure, driving such as electronic, as long as can realize the reciprocal stretching motion of piston rod.
Among the present invention, can also be connected with a pull bar respectively at helical spring two ends, can make the heat exchanger tube two ends reach same cleaning effect like this.
For the multi coil bundle, the boiler back end ductwork heat exchanger tube deashing device on a plurality of heat exchanger tubes can a shared retractor device, to practice thrift equipment cost.
Beneficial effect:The present invention compares with existing boiler back end ductwork heat exchanger tube deashing device, has the following advantages:
The operation principle of apparatus of the present invention be utilize the helical spring contraction be wrapped on the heat exchanger tube outer wall, extensional motion produced and the axial relative motion of heat exchanger tube outer wall, will remove attached to the heat exchange pipe external surface dust stratification.External impetus equipment only is provided for straining helical spring mechanical power, compares with other oscillatory type deashing devices to have reduced powered attendant-controlled wheelchairs consumption, has improved mechanical efficiency.
Apparatus of the present invention do not need blowing out when carrying out deashing work, have so just improved boiler operating efficiency, the trouble that can not cause boiler to restart;
Apparatus of the present invention cleaning cycle is short, can be specially adapted in the type of furnace of the complicated cleanings in time of flying dust characteristic such as incinerator according to boiler combustion characteristic, flying dust Characteristics Control deashing frequency.
Apparatus of the present invention are simple in structure, be convenient to maintenance, and cost of investment are low, is highly suitable for middle-size and small-size Industrial Boiler.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is an A-A cross-sectional view among Fig. 1;
Fig. 3 is B end pull bar draft helical spring view;
Fig. 4 discharges helical spring state sketch map for B end pull bar;
Fig. 5 helical spring two ends all are connected with the apparatus structure sketch map of pull bar;
Fig. 6 is many row's heat exchanger tube deashing device scheme of installations.
Have among the figure: helical spring 1, pull bar 2, the first baffle seal plate 21, the second baffle seal plate 22, heat exchanger tube 3, walling of flue 4, retractor device 5, handle 6.
The specific embodiment
Boiler back end ductwork heat exchanger tube deashing device of the present invention; Comprise helical spring 1 and pull bar 2, pull bar 2 axially parallel with the flexible direction of helical spring 1, an end of pull bar 2 is connected with an end of helical spring 1; Helical spring 1 is wrapped in the outside of institute's removing heat exchanger tube 3; Pull bar 2 passes the walling of flue 4 of place boiler, and the bar section that pull bar 2 is positioned at walling of flue 4 outsides is provided with the first baffle seal plate baffle plate 21, is positioned at walling of flue 4 inboard bar sections and is provided with the second baffle seal plate 22.
In one embodiment of the present of invention, pull bar 2 is one, and the end that helical spring 1 is not connected with pull bar 2 is fixed on walling of flue 4 inside.
In the another embodiment of the present invention, the two ends of helical spring 1 are connected with a pull bar 2 respectively, and the deashing operating process is carried out at two ends successively during work, and concrete operation method is:
The first step: as shown in Figure 2; Deashing work begins; Artificial or automatic control discharges the pull bar 2 that is positioned at the A end; An end that is wrapped in heat exchanger tube 3 outer walls and is in the helical spring 1 under the extended state remove stressed after-contraction and along heat exchanger 3 axially by moving, mainly to hold a side pipe section to carry out deashing near A.Motion stops when the first baffle seal plate, 21 contact walling of flues 4.
Second step: as shown in Figure 3, after last step motion was done to stop slightly, the pull bar 2 that will be positioned at the A end retracted, and helical spring 1 receives tensile, and motion stops when the second baffle seal plate, 22 contact walling of flues 4.
The 3rd step: as shown in Figure 4, discharge and retract the pull bar 2 that is positioned at the B end according to above-mentioned two steps, mainly to hold a side pipe section to carry out deashing near B.
Aforesaid operations can repeat repeatedly according to actual needs, can reach ash-removal effect preferably.
In one embodiment of the present of invention, the end that pull bar 2 is positioned at walling of flue 4 outsides is connected with retractor device 5.
In an alternative embodiment of the invention, the end that pull bar 2 is positioned at walling of flue 4 outsides is connected with handle 6.
Claims (5)
1. boiler back end ductwork heat exchanger tube deashing device; It is characterized in that; Comprise helical spring (1) and pull bar (2), said pull bar (2) axially parallel with the flexible direction of helical spring (1), an end of pull bar (2) is connected with an end of helical spring (1); Said helical spring (1) is wrapped in the outside of institute's removing heat exchanger tube (3); Pull bar (2) passes the walling of flue (4) of place boiler, and the bar section that pull bar (2) is positioned at said walling of flue (4) outside is provided with the first baffle seal plate baffle plate (21), is positioned at the inboard bar section of walling of flue (4) and is provided with the second baffle seal plate (22).
2. boiler back end ductwork heat exchanger tube deashing device according to claim 1 is characterized in that said pull bar (2) is one, and the end that helical spring (1) is not connected with pull bar (2) is fixed on walling of flue (4) inside.
3. boiler back end ductwork heat exchanger tube deashing device according to claim 1 is characterized in that said pull bar (2) is two, is connected to the two ends of helical spring (1).
4. according to claim 1,2 or 3 described boiler back end ductwork heat exchanger tube deashing devices, it is characterized in that the end that said pull bar (2) is positioned at walling of flue (4) outside is connected with retractor device (5).
5. according to claim 1,2 or 3 described boiler back end ductwork heat exchanger tube deashing devices, it is characterized in that the end that said pull bar (2) is positioned at walling of flue (4) outside is connected with handle (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101512493A CN102644931A (en) | 2012-05-16 | 2012-05-16 | Ash removal device for heat exchange pipe of tail flue of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101512493A CN102644931A (en) | 2012-05-16 | 2012-05-16 | Ash removal device for heat exchange pipe of tail flue of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102644931A true CN102644931A (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101512493A Pending CN102644931A (en) | 2012-05-16 | 2012-05-16 | Ash removal device for heat exchange pipe of tail flue of boiler |
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| Country | Link |
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| CN (1) | CN102644931A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402909A (en) * | 2016-10-31 | 2017-02-15 | 深圳市凯盛科技工程有限公司 | Soot blowing device for convection heat-transfer pipe |
| CN110973681A (en) * | 2019-11-30 | 2020-04-10 | 云南省烟草农业科学研究院 | Device for automatically disturbing flue gas inside heat dissipation pipe of bulk curing barn for heat dissipation and ash removal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042480U (en) * | 1988-12-30 | 1989-08-09 | 白明杰 | Spring type cleaning device for removing of obstructions in waste pipes |
| CN2265482Y (en) * | 1996-06-07 | 1997-10-22 | 朱祖柯 | Blocking-resistance device for boiler air preheating device |
| CN1176631A (en) * | 1994-10-14 | 1998-03-18 | 沃垦过氧化反应系统有限公司 | Wiper cartridge |
| US6689270B1 (en) * | 1997-09-05 | 2004-02-10 | Lynn Evert | Water treatment apparatus reducing hard water deposits in a conduit |
| CN202561779U (en) * | 2012-05-16 | 2012-11-28 | 东南大学 | Dust cleaning device for heat exchange pipe of boiler flue |
-
2012
- 2012-05-16 CN CN2012101512493A patent/CN102644931A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042480U (en) * | 1988-12-30 | 1989-08-09 | 白明杰 | Spring type cleaning device for removing of obstructions in waste pipes |
| CN1176631A (en) * | 1994-10-14 | 1998-03-18 | 沃垦过氧化反应系统有限公司 | Wiper cartridge |
| CN2265482Y (en) * | 1996-06-07 | 1997-10-22 | 朱祖柯 | Blocking-resistance device for boiler air preheating device |
| US6689270B1 (en) * | 1997-09-05 | 2004-02-10 | Lynn Evert | Water treatment apparatus reducing hard water deposits in a conduit |
| CN202561779U (en) * | 2012-05-16 | 2012-11-28 | 东南大学 | Dust cleaning device for heat exchange pipe of boiler flue |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402909A (en) * | 2016-10-31 | 2017-02-15 | 深圳市凯盛科技工程有限公司 | Soot blowing device for convection heat-transfer pipe |
| CN110973681A (en) * | 2019-11-30 | 2020-04-10 | 云南省烟草农业科学研究院 | Device for automatically disturbing flue gas inside heat dissipation pipe of bulk curing barn for heat dissipation and ash removal |
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Application publication date: 20120822 |