CN104132356A - Device for preventing chimney rain and gypsum rain by heating inner cylinder wall of wet chimney through steam - Google Patents
Device for preventing chimney rain and gypsum rain by heating inner cylinder wall of wet chimney through steam Download PDFInfo
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- CN104132356A CN104132356A CN201410368851.1A CN201410368851A CN104132356A CN 104132356 A CN104132356 A CN 104132356A CN 201410368851 A CN201410368851 A CN 201410368851A CN 104132356 A CN104132356 A CN 104132356A
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- chimney
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- cylinder wall
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Abstract
The invention discloses a device for preventing chimney rain and gypsum rain by heating the inner cylinder wall of a wet chimney through steam. The device comprises a steam pipeline, a temperature sensor and a microcomputer controller. The steam pipeline is arranged on the inner wall of a chimney outer cylinder and comprises a water outlet pipe and a water return pipe, and an electric valve is arranged on the water outlet pipe; the temperature sensor and the microcomputer controller are arranged on the outer wall of a chimney inner cylinder, the temperature sensor is connected with the microcomputer controller, and the microcomputer controller is connected with the electric valve. According to the device for preventing the chimney rain and the gypsum rain by heating the inner cylinder wall of the wet chimney through the steam, a steam heating mode is adopted to enable the temperature of the inner cylinder wall of the chimney to stay the same as the temperature of smoke, condensate generated on the inner cylinder wall due to the fact that the smoke dissipates heat outwards due to a temperature difference between the smoke and the inner cylinder wall and a temperature difference between the smoke and external environment is eliminated basically, the liquid drop content in the smoke and the condensate secondary entrainment phenomenon are effectively reduced, and therefore the phenomenon of the chimney rain or the gypsum rain or acid mist sedimentation nearby the chimney is effectively prevented.
Description
Technical field
The present invention relates to chimney field, particularly the device of the wet chimney internal cylinder wall control of a kind of Steam Heating chimney rain, gypsum rain.
Background technology
Wet desulfurization of flue gas by limestone-gypsum method technique is that world is applied at most and the most ripe technique, is also the leading technique of domestic thermal power plant desulfurization.Fired power generating unit more than China 300MW exceedes 90% employing wet desulfurization of flue gas by limestone-gypsum method (WFGD) technology, in Limestone-gypsum Wet Flue Gas Desulfurization Process system, absorption tower exit gas temperature is 50 DEG C of left and right, and China's " Coal,steam plant with FGD designing technique code " (DL/T5196-2004) specifies " under design conditions, the flue-gas temperature of desulfurization after funnel entrance generally should reach more than 80 DEG C discharge ", there is a flue gas heat-exchange unit (Gas-gas heater, GGH) so early stage WFGD system of installing is substantially all supporting.But in actual motion, GGH parts there will be the problems such as serious burn into heat exchange element obstruction, affect the safe and stable operation of WFGD system.In view of " Coal,steam plant with FGD designing technique code " " meeting, environmental requirement and chimney and flue have perfect anticorrosion and drainage measure and also can not establish flue gas heat-exchange unit in the time that Technological Economy is more reasonable ", so the later stage WFGD system of design is seldom installed GGH, original WFGD system also starts to cancel GGH device.
In actual moving process, while directly passing through wet chimney discharged to atmosphere without the saturated clean flue gas of WFGD system of GGH, easily produce " chimney rain ", " gypsum rain " or acid mist sedimentation phenomenon, bring new environmental issue.
" chimney rain ", " gypsum rain " or the genetic analysis of acid mist sedimentation phenomenon are as follows:
(1) flue gas carry liquid secretly
Former flue gas washs through spraying layer, and after demister demist, from absorption tower outlet, through connecting flue to the process of chimney top discharge, is less than the drop of 50um diameter, discharges with smoke gas flow.
(2) condensate liquid of flue gas
Former flue gas is through spraying layer washing, and after demister demist, from absorption tower outlet, through connecting flue to the process of chimney lining top discharge, conventionally has the temperature drop of 0.5～1.0 DEG C, thus caused flue gas saturated-condensation produced droplet.
(3) smoke secondary is carried liquid secretly
The drop that the drop of taking away from demister and condensation produce, can be at region clusterings such as chimney/flue inwall, chimney entrance bottoms.Along with the continuous deposition of drop, they just can be subject to the downward pulling force of self gravitation, simultaneously, flue gas also can apply one and the unidirectional pulling force of smoke gas flow to liquid, in the time reaching from the power of flue gas or exceed the adhesive force of drop self gravitation and inner surface, liquid reenters or is entered smoke gas flow and be entrained with chimney by reentrainment.
Between chimney internal cylinder wall, external environment (comprising the region between inner/outer tube) and flue gas, have the temperature difference, flue gas easily externally dispels the heat and on inner tube wall, produces condensate liquid, and this is the major reason that causes chimney rain, gypsum rain phenomenon.
Chimney rain, gypsum rain improvement technology prevailing for the time being in force comprise condensed fluid collection device: according to the architectural characteristic of chimney/flue, in chimney/flue inside, a series of liquid collectors are set.This device can solve chimney rain, the gypsum rain phenomenon that the wet chimney of current desulfurization exists substantially, and post facility safeguard simple, when system operation also without extra consumed energy.If the patent No. is that " CN201220569928 ", patent name are disclosed device in the Chinese patent of " wet chimney internal cylinder wall condensed fluid collection device ".
But at existing titanium steel composite board internal cylinder chimney and the too high chimney of flue gas flow rate, exceed after the wet normal range of operation of chimney in service condition, can not eliminate completely chimney rain, gypsum rain phenomenon by installing condensed fluid collection device additional, therefore need badly and develop another more chimney rain, gypsum rain control device of high efficient and reliable.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, a kind of wet chimney internal cylinder wall control of Steam Heating chimney rain of high efficient and reliable, the device of gypsum rain are proposed, substantially to remove smoke and inner core wall, the external environment condensate liquid that externally heat radiation produces on inner tube wall due to the temperature difference, effectively reduce the droplet content condensate liquid reentrainment phenomenon in flue gas, thus near the generation that effectively solves " chimney rain ", " gypsum rain " phenomenon or acid mist sedimentation phenomenon chimney.
For solving the problems of the technologies described above, the present invention is achieved through the following technical solutions:
The invention provides the device of the wet chimney internal cylinder wall control of a kind of Steam Heating chimney rain, gypsum rain, this device comprises: jet chimney, it is arranged on the inwall of chimney urceolus, and described jet chimney comprises outlet pipe and return pipe, on described outlet pipe, is provided with electrically operated valve; Temperature sensor, it is arranged on the outer wall of chimney internal cylinder; Microcomputer controller, it is arranged on the outer wall of described chimney internal cylinder.Wherein: described temperature sensor is connected with described microcomputer controller, described microcomputer controller is connected with described electrically operated valve.
The temperature of temperature sensor senses chimney internal cylinder outer wall, this temperature is passed to microcomputer controller, the temperature that microcomputer controller transmits with temperature sensor according to default temperature is compared, the temperature arriving when temperature sensor senses is during higher than default temperature, control electrically operated valve is closed, while cutting off temperature that flowing of water in outlet pipe arrive when temperature sensor senses lower than preset temperature, control electrically operated valve and open, recover the mobile of water in water pipe.
Preferably, this device also comprises the seal cover board being arranged between described chimney internal cylinder and described chimney urceolus.
Preferably, this device also comprises the insulation material on the inwall of the chimney urceolus that is laid in.
Preferably, the caliber of described outlet pipe and described return pipe is DN25～DN100.
Preferably, described electrically operated valve is arranged on the upper semisection of described outlet pipe, because the water in outlet pipe is to enter from the lower end of outlet pipe, so the temperature in outlet pipe upper semisection region is relatively low, so electrically operated valve is arranged on to the upper semisection of outlet pipe, can ensures better the uniformity of upper-lower section regional temperature.
Preferably, between described outlet pipe and described return pipe, be connected with fin, can increasing heat radiation area, heat is dispersed into the region between chimney internal cylinder and chimney urceolus quickly.
Preferably, described fin is provided with multiple along the vertical direction of the inwall of described chimney urceolus, between adjacent two, is spaced apart 1m～3m.
Preferably, described jet chimney at least arranges eight groups along the circumferencial direction of the inwall of described chimney urceolus, and the described microcomputer controller of equal number is set on the outer wall of described chimney internal cylinder, and the position of described microcomputer controller is corresponding with described jet chimney.
Preferably, described temperature sensor is at least provided with four along the circumferencial direction of the outer wall of described chimney internal cylinder, form one group described in temperature sensor; Described temperature sensor arranges many groups along the vertical direction of the outer wall of described chimney internal cylinder, between two adjacent groups, is spaced apart 10m～30m; Described temperature sensor be connected apart from its nearest described microcomputer controller.
Preferably, described jet chimney is fixed by the inwall of fixing clip, bolt and described chimney urceolus; Wherein: described fixing clip two ends are provided with bolt hole, described bolt is fixed on jet chimney on the inwall of described chimney urceolus through described bolt hole, has increased the stability of device.
Compared to prior art, the present invention has the following advantages:
The chimney rain of the wet chimney internal cylinder wall of Steam Heating provided by the invention, gypsum rain control device, by steam-heated mode is carried out in region between chimney inner/outer tube, chimney internal cylinder wall surface temperature and flue-gas temperature are consistent, substantially eliminated flue gas and inner core wall, the external environment condensate liquid that externally heat radiation produces on inner tube wall due to the temperature difference, effectively reduce droplet content and the condensate liquid reentrainment phenomenon in flue gas, thereby effectively avoid near the generation of " chimney rain ", " gypsum rain " or acid mist sedimentation phenomenon chimney.This device:
(1) simple in structure, the production cycle is shorter;
(2) applied widely: except the wet chimney of titanium steel composite board inner core, also can be widely used in the wet chimney of the other types such as concrete, brick inner core;
(3) efficient: can substantially solve the generation of current desulfuration chimney " chimney rain ", " gypsum rain " or acid mist sedimentation phenomenon urgently to be resolved hurrily that especially titanium steel composite board internal cylinder chimney and the too high chimney of flue gas flow rate exist, this device can also effectively solve chimney top ice formation issues in addition.
Brief description of the drawings
Below in conjunction with accompanying drawing, embodiments of the present invention are described further:
Fig. 1 is the overall structure figure of the device of the wet chimney internal cylinder wall control of the Steam Heating of embodiment of the present invention chimney rain, gypsum rain;
Fig. 2 is the detail view of the device of the wet chimney internal cylinder wall control of the Steam Heating of embodiment of the present invention chimney rain, gypsum rain;
Fig. 3 is the top view of the device of the wet chimney internal cylinder wall control of the Steam Heating of embodiment of the present invention chimney rain, gypsum rain;
Fig. 4 is the side view of the device of the wet chimney internal cylinder wall control of the Steam Heating of embodiment of the present invention chimney rain, gypsum rain.
Label declaration:
1-seal cover board, 2-jet chimney, 3-chimney internal cylinder, 4-chimney urceolus, 5-fin, 6-temperature sensor, 7-microcomputer controller, 8-electrically operated valve, 9-insulation material, 10-fixes clip, 11-bolt, 12-outlet pipe, 13-return pipe.
Detailed description of the invention
Below embodiments of the invention are elaborated, the present embodiment is implemented under taking technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Refer to Fig. 1-Fig. 4, the device of the wet chimney internal cylinder wall control of Steam Heating of the present invention chimney rain, gypsum rain comprises: jet chimney 2, temperature sensor 6 and microcomputer controller 7, jet chimney 2 is arranged on the inwall of chimney urceolus 4, jet chimney 2 comprises outlet pipe 12 and return pipe 13, is provided with electrically operated valve 8 on outlet pipe; Temperature sensor 6 is arranged on the outer wall of chimney internal cylinder 3; Microcomputer controller 7 is arranged on the outer wall of chimney internal cylinder 3.Wherein: temperature sensor 6 is connected with microcomputer controller 7, microcomputer controller 7 is connected with electrically operated valve 8.Temperature sensor 6 is responded to the outside wall temperature of chimney internal cylinder 3, passed to microcomputer controller 7, the temperature that microcomputer controller 7 senses according to preset temperature and temperature sensor 6 is compared, control electrically operated valve 8 unlatching, close, thereby control the temperature between chimney internal cylinder and chimney urceolus.
In the present embodiment, this device also comprises the seal cover board 1 being arranged between chimney internal cylinder 3 and chimney urceolus 4, and the regional seal between chimney internal cylinder 3 and chimney urceolus 4 is got up, and reduces the outer loose of heat; Also comprise the insulation material 9 being laid on chimney urceolus 4 inwalls, can control heat, reduce the loss of heat, keep better the temperature in chimney inner/outer tube region, make it consistent with flue-gas temperature, thereby effectively eliminate the condensate liquid that inner core wall, external environment and flue gas generate due to the temperature difference.
In the present embodiment, jet chimney 2 is fixed with chimney urceolus 4 inwalls by fixing clip 10, bolt 11; Wherein: the two ends of fixing clip 10 are provided with bolt hole, bolt 11 is fixed on jet chimney 2 on the inwall of chimney urceolus 4 through bolt hole, has increased the stability of device.
In the present embodiment, between outlet pipe 12 and return pipe 13, be connected with heat radiation 5, can increasing heat radiation area, heat is dispersed into the region between chimney internal cylinder 3 and chimney urceolus 4 quickly.
In different embodiment, fin 5 can arrange along the vertical direction of the inwall of chimney urceolus 4 multiple, and the interval between adjacent two can be 1m～3m.
Generally, the caliber of outlet pipe 12 and return pipe 13 is DN25～DN100.
In preferred embodiment, electrically operated valve is arranged on the upper semisection of outlet pipe 12, because the water in outlet pipe 12 is to enter from the lower end of outlet pipe 12, so the temperature in outlet pipe upper semisection region is relatively low, so electrically operated valve is arranged on to the upper semisection of outlet pipe, can ensures better the uniformity of chimney epimere and chimney hypomere regional temperature.
In preferred embodiment, jet chimney 2 at least arranges eight groups along the circumferencial direction of the inwall of chimney urceolus 4, and the microcomputer controller 7 of equal number is set with the corresponding position of jet chimney 2 on the outer wall of chimney internal cylinder 3; Temperature sensor 6 at least arranges four along the circumferencial direction of the outer wall of chimney internal cylinder 3, forms one group of temperature sensor 6; Temperature sensor 6 arranges many groups along the vertical direction of the outer wall of chimney internal cylinder 3, and the interval between two adjacent groups can be 10m～30m; Temperature sensor 6 be connected apart from its nearest microcomputer controller 7.
The device of the wet chimney internal cylinder wall control of electric-heating belt heating of the present invention chimney rain, gypsum rain can be arranged on the wet chimney of titanium steel composite board, also can be arranged on the wet chimney of the other types such as concrete, brick inner core.
Disclosed herein is only the preferred embodiments of the present invention, and these embodiment are chosen and specifically described to this description, is in order to explain better principle of the present invention and practical application, is not limitation of the invention.The modifications and variations that any those skilled in the art do within the scope of description, all should drop in the scope that the present invention protects.
Claims (10)
1. a device for the wet chimney internal cylinder wall control of Steam Heating chimney rain, gypsum rain, is characterized in that, comprising:
Jet chimney, it is arranged on the inwall of chimney urceolus, and described jet chimney comprises outlet pipe and return pipe, on described outlet pipe, is provided with electrically operated valve;
Temperature sensor, it is arranged on the outer wall of chimney internal cylinder;
Microcomputer controller, it is arranged on the outer wall of described chimney internal cylinder; Wherein:
Described temperature sensor is connected with described microcomputer controller, and described microcomputer controller is connected with described electrically operated valve.
2. the device of the wet chimney internal cylinder wall control of Steam Heating according to claim 1 chimney rain, gypsum rain, is characterized in that, also comprise seal cover board, it is arranged between described chimney internal cylinder and described chimney urceolus.
3. the device of the wet chimney internal cylinder wall control of Steam Heating according to claim 1 chimney rain, gypsum rain, is characterized in that, also comprises insulation material, on the inwall of its described chimney urceolus that is laid in.
4. the device of the wet chimney internal cylinder wall control of Steam Heating according to claim 1 chimney rain, gypsum rain, is characterized in that, the caliber of described outlet pipe and described return pipe is DN25～DN100.
5. the device of the wet chimney internal cylinder wall control of Steam Heating according to claim 1 chimney rain, gypsum rain, is characterized in that, described electrically operated valve is arranged on the upper semisection of described outlet pipe.
6. the device of the wet chimney internal cylinder wall control of Steam Heating according to claim 1 chimney rain, gypsum rain, is characterized in that, between described outlet pipe and described return pipe, is connected with fin.
7. the device of the wet chimney internal cylinder wall control of Steam Heating according to claim 6 chimney rain, gypsum rain, is characterized in that, described fin is provided with multiple along the vertical direction of the inwall of described chimney urceolus, between adjacent two, is spaced apart 1m～3m.
8. the device of the wet chimney internal cylinder wall control of Steam Heating according to claim 7 chimney rain, gypsum rain, it is characterized in that, described jet chimney at least arranges eight groups along the circumferencial direction of the inwall of described chimney urceolus, the described microcomputer controller that equal number is set on the outer wall of described chimney internal cylinder, the position of described microcomputer controller is corresponding with described jet chimney.
9. the device of the wet chimney internal cylinder wall control of Steam Heating according to claim 8 chimney rain, gypsum rain, is characterized in that, described temperature sensor at least arranges four along the circumferencial direction of the outer wall of described chimney internal cylinder, form one group described in temperature sensor;
Described temperature sensor arranges many groups along the vertical direction of the outer wall of described chimney internal cylinder, between two adjacent groups, is spaced apart 10m～30m;
Described temperature sensor be connected apart from its nearest described microcomputer controller.
10. according to the device of the wet chimney internal cylinder wall control of the Steam Heating described in claim 1 to 9 any one chimney rain, gypsum rain, it is characterized in that, described jet chimney is fixed by the inwall of fixing clip, bolt and described chimney urceolus; Wherein:
Described fixing clip two ends are provided with bolt hole, and described bolt is fixed on described jet chimney on the inwall of described chimney urceolus through described bolt hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410368851.1A CN104132356A (en) | 2014-07-30 | 2014-07-30 | Device for preventing chimney rain and gypsum rain by heating inner cylinder wall of wet chimney through steam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410368851.1A CN104132356A (en) | 2014-07-30 | 2014-07-30 | Device for preventing chimney rain and gypsum rain by heating inner cylinder wall of wet chimney through steam |
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| CN104132356A true CN104132356A (en) | 2014-11-05 |
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| CN201410368851.1A Pending CN104132356A (en) | 2014-07-30 | 2014-07-30 | Device for preventing chimney rain and gypsum rain by heating inner cylinder wall of wet chimney through steam |
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Citations (7)
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| JP2002323216A (en) * | 2001-04-24 | 2002-11-08 | Kawasaki Heavy Ind Ltd | Method for preventing waste smoke to white smoke, and waste smoke apparatus for preventing the white smoke |
| JP2006189195A (en) * | 2005-01-06 | 2006-07-20 | Takuma Co Ltd | White fuming preventing method |
| CN201719963U (en) * | 2010-05-14 | 2011-01-26 | 张永洲 | No-GGH FGD desulphurized smoke emission device and chimney |
| CN201724237U (en) * | 2010-07-27 | 2011-01-26 | 张永洲 | Device for removing stack rain generated by discharge of desulfurization fume stack |
| CN102418933A (en) * | 2012-01-16 | 2012-04-18 | 常熹钰 | Corrosion-resistant chimney with cylinder wall heating device |
| CN102573142A (en) * | 2010-12-09 | 2012-07-11 | 沈阳市中色测温仪表材料研究所有限公司 | Anti-icing electric heating device for chimney mouth |
| CN204006051U (en) * | 2014-07-30 | 2014-12-10 | 上海迪夫格环境科技有限公司 | The device of the wet chimney internal cylinder wall control of a kind of Steam Heating chimney rain, gypsum rain |
-
2014
- 2014-07-30 CN CN201410368851.1A patent/CN104132356A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002323216A (en) * | 2001-04-24 | 2002-11-08 | Kawasaki Heavy Ind Ltd | Method for preventing waste smoke to white smoke, and waste smoke apparatus for preventing the white smoke |
| JP2006189195A (en) * | 2005-01-06 | 2006-07-20 | Takuma Co Ltd | White fuming preventing method |
| CN201719963U (en) * | 2010-05-14 | 2011-01-26 | 张永洲 | No-GGH FGD desulphurized smoke emission device and chimney |
| CN201724237U (en) * | 2010-07-27 | 2011-01-26 | 张永洲 | Device for removing stack rain generated by discharge of desulfurization fume stack |
| CN102573142A (en) * | 2010-12-09 | 2012-07-11 | 沈阳市中色测温仪表材料研究所有限公司 | Anti-icing electric heating device for chimney mouth |
| CN102418933A (en) * | 2012-01-16 | 2012-04-18 | 常熹钰 | Corrosion-resistant chimney with cylinder wall heating device |
| CN204006051U (en) * | 2014-07-30 | 2014-12-10 | 上海迪夫格环境科技有限公司 | The device of the wet chimney internal cylinder wall control of a kind of Steam Heating chimney rain, gypsum rain |
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