CN105351954A - Flue system for outlet of tower-type furnace air pre-heater of thermal power plant - Google Patents
Flue system for outlet of tower-type furnace air pre-heater of thermal power plant Download PDFInfo
- Publication number
- CN105351954A CN105351954A CN201510830796.8A CN201510830796A CN105351954A CN 105351954 A CN105351954 A CN 105351954A CN 201510830796 A CN201510830796 A CN 201510830796A CN 105351954 A CN105351954 A CN 105351954A
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- CN
- China
- Prior art keywords
- flue
- air preheater
- outlet
- power plant
- thermal power
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
Abstract
The invention discloses a flue system for an outlet of a tower-type furnace air pre-heater of a thermal power plant. The system comprises a denitrification reactor, air pre-heaters, dust removers, a first-stage flue and flow division flues. The denitrification reactor, the first-stage flue, the air pre-heaters, the flow division flues and the dust removers are sequentially connected. The system further comprises a flow division square-circular port joints. The flow division flues are connected with the air pre-heaters through the flow division square-circular port joints. By the adoption of the flue system, it is guaranteed that smoke flows into all the flow division flues through the air pre-heaters evenly, so that the dust removing efficiency of the dust removers is improved; and the distance between the dust removers and the air pre-heaters is greatly reduced, the main workshop space and occupied area are saved, and investment is saved.
Description
Technical field
The present invention relates to steam power plant, specifically a kind of flue system for the outlet of thermal power plant tower-type furnace air preheater.
Background technology
Thermal power plant coal unit can produce a large amount of dust due to burning of coal in power generation process, and the flue gas that dust can produce along with boiler combustion is discharged.Therefore, large-size thermal power plant coal unit can arrange deduster by the dust removal in flue gas in the flue system between boiler air preheater outlet and air-introduced machine entrance, ensures that the dust concentration in the flue gas of final chimney breast meets the requirement of the thermal power plant atmosphere pollutants emission standards that national environmental protection department formulates.The construction of the thermal power generation unit of power industry in recent years, towards high parameter, Large Copacity development, causes the atmosphere pollution of power plant emission more serious to the pollution of environment.National environmental protection department has put on new height to the standard of thermal power plant's dust emission in " atmosphere pollutants emission standards " (GB13223-2011) of new revision.Therefore, the requirement of thermal power plant to the efficiency of dust collection of deduster is more and more higher.In large-scale thermal power machine group, the pattern of deduster mainly contains electrostatic precipitator, sack cleaner and electrostatic fabric filter.For the deduster of various types, the factor affecting its efficiency of dust collection is a lot.But for the deduster of any pattern, ensure that the flue gas flow entering each passage of deduster is balanced, to ensure the uniform stream distribution of each feeder connection entering deduster, the efficiency of dust collection of deduster could be improved to greatest extent.
At present, as shown in Figure 1, flue system for the outlet of thermal power plant tower-type furnace air preheater is formed primarily of the out of stock reactor 1 connected successively, one-level flue 4, air preheater 2, point flow flue 5 and deduster 3, wherein divides flow flue 5 to be connected with air preheater 2 by rectangular elbow 8.Though these flue systems for the outlet of thermal power plant tower-type furnace air preheater to a certain degree ensure that the efficiency of dust collection of deduster, but also can there are some defects, the flue system particularly for air preheater outlet in the Thermal generation unit of 1000MW level is still obvious.Turn as also having one 90 degree due to the one-level flue between air preheater entrance and out of stock reactor, and turn direction and air preheater after flue gas shunting direction be inconsistent, therefore the deflection of generation flue gas inevitably has influence on follow-up flue gas shunting during the turning of one-level flue gas in flue, even if the air preheater of the tower boiler in this 1000MW thermal power plant is exported in deduster inlet distribution flue and is provided with a large amount of deflector, but flue gas shunting effect is not good, be difficult to realize the restriction requirement that deduster controls within 10% to each passage flue gas flow deviation, therefore have impact on the efficiency of dust collection of deduster.Meanwhile, be exported to the conventional design of deduster inlet distribution flue by the air preheater of the tower boiler in this 1000MW thermal power plant, the distance that air preheater is exported to deduster entrance is comparatively large, can increase the floor space of whole unit main building.
Summary of the invention
The object of the invention is to the deficiency overcoming the existence of above prior art, provide a kind of flue system for the outlet of thermal power plant tower-type furnace air preheater.This flue system for the outlet of thermal power plant tower-type furnace air preheater can improve the efficiency of dust collection of deduster, and floor space is little simultaneously.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of flue system for the outlet of thermal power plant tower-type furnace air preheater, comprise out of stock reactor, air preheater, deduster, one-level flue and point flow flue, described out of stock reactor, one-level flue, air preheater, a point flow flue are connected successively with deduster, also comprise shunting circumference joint, described point of flow flue is connected with air preheater by shunting circumference joint.
Preferably, described air preheater, deduster and shunting circumference joint all have 2, described point of flow flue has 6, these 6 points of flow flues are one group with 3 and form 2 component flow flues, one end of point flow flue described in 2 groups is connected with 2 air preheaters respectively by 2 shunting circumference joints, and described in 2 groups, the other end of point flow flue is connected with 2 dedusters respectively.
Preferably, described shunting circumference joint comprises 3 first party round knots, and these 3 first party round knots arrange compact siro spinning technology successively with one, and the round mouth end of each described first party round knot is tightly connected with one end of point flow flue; The square opening end of 3 described first party round knots connects and is connected with the exit seal of air preheater afterwards.
Preferably, the described flue system for the outlet of thermal power plant tower-type furnace air preheater, also comprise the second party round knot equal with point flow flue quantity, the other end of described point of flow flue is connected with the entrance of deduster by corresponding second party round knot.
Preferably, the size of the square opening end of described shunting circumference joint is equal with the outlet size of air preheater.
Preferably, the diameter 4300mm ~ 4800mm of described point of flow flue.
The present invention, relative to prior art, has following advantage and effect:
1, this flue system being used for thermal power plant tower-type furnace air preheater outlet eliminates rectangular elbow, shunting circumference joint is utilized to be divided by air preheater exiting flue gas diffluence to shunt flue, then it reduce 90 degree of impacts of turning of the one-level flue between air preheater entrance and out of stock reactor, namely produce flue gas deflection when one-level flue gas in flue is turned to have an impact to follow-up flue gas shunting, ensure that to flow into the flue gas of each point of flow flue from air preheater even, thus improve the efficiency of dust collection of deduster; Concrete, through Simulation, this flue system being used for thermal power plant tower-type furnace air preheater outlet can ensure that the flue gas flow deviation entering each passage of deduster controls within 5%.
2, this point flow flue be used in the flue system of thermal power plant tower-type furnace air preheater outlet is connected with the outlet of air preheater by shunting circumference joint, greatly reduce the distance between deduster and air preheater, save main building space and floor space, investment reduction.
3, this flue system being used for thermal power plant tower-type furnace air preheater outlet adopts shunting circumference joint to shunt, do not need to use rectangular elbow, rectangle reducer pipe and rectangle shunting irregular part, then do not need to arrange reinforcing rib, internal overarm support and deflector at these rectangular flue parts, greatly reduce the loss of material, further save investment.
4, this flue system being used for thermal power plant tower-type furnace air preheater outlet adopts shunting circumference joint to shunt, then can reduce length and the sweep of point flow flue, reduce the resistance that flue enters flowing in point flow flue.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional flue system for the outlet of thermal power plant tower-type furnace air preheater.Arrow in figure is the flow direction of flue gas.
Fig. 2 is the structural representation of the flue system for the outlet of thermal power plant tower-type furnace air preheater of the present invention.Arrow in figure is the flow direction of flue gas.
Fig. 3 is the structural representation that the present invention shunts when circumference joint and second party round knot are installed on point flow flue two ends respectively.
Fig. 4 is the side view of the flue system for the outlet of thermal power plant tower-type furnace air preheater of the present invention.
Detailed description of the invention
For ease of it will be appreciated by those skilled in the art that the present invention is described in further detail below in conjunction with drawings and Examples.
As shown in Figures 2 to 4, this is used for the flue system of thermal power plant tower-type furnace air preheater outlet, comprise out of stock reactor 1, air preheater 2, deduster 3, one-level flue 4 and point flow flue 5, described out of stock reactor 1, one-level flue 4, air preheater 2, a point flow flue 5 are connected successively with deduster 3, also comprise shunting circumference joint 6, described point of flow flue 5 is connected with air preheater 2 by shunting circumference joint 6.Wherein, the diameter 4620mm of described point of flow flue 5.Described air preheater 2, deduster 3 and shunting circumference joint 6 all have 2, described point of flow flue 5 has 6, these 6 points of flow flues 5 are one group with 3 and form 2 component flow flues 5, one end of point flow flue 5 described in 2 groups is connected with 2 air preheaters 2 respectively by 2 shunting circumference joints 6, and described in 2 groups, the other end of point flow flue 5 is connected with 2 dedusters 3 respectively.In practice, flue gas first flows out from out of stock reactor 1 and enter air preheater 2 after one-level flue 4, again after the outlet out of air preheater 2, successively by after shunting circumference joint 6 and point flow flue 5, enter in each exhaust gases passes of deduster 3, and enter the uniformity of the flue gas flow in each exhaust gases passes, can ensure that the flue gas flow deviation of each exhaust gases passes entering deduster 3 controls within 5%, improve the efficiency of dust collection of deduster 3.Meanwhile, adopt shunting circumference joint 6 to shunt, this can reduce the length of point flow flue 5 and reduce the sweep of point flow flue 5, therefore reduces the loss of material, decreases cost of investment.
Described shunting circumference joint 6 comprises 3 first party round knots 61, and these 3 first party round knots 61 arrange compact siro spinning technology successively with one, and the round mouth end of each described first party round knot 61 is tightly connected with one end of point flow flue 5; The square opening end of 3 described first party round knots 61 connects and is connected with the exit seal of air preheater 2 afterwards.This is simple and compact for structure, and 3 first party round knots 61 connect and form shunting circumference joint 6, ensure that effect, improve the dust removing effects of deduster 2.
The described flue system for the outlet of thermal power plant tower-type furnace air preheater, also comprise the second party round knot 7 equal with point flow flue quantity, the other end of described point of flow flue 5 is connected with the entrance of deduster 3 by corresponding second party round knot 7.Second party round knot 7 ensure that the compactness and compactedness that are connected between point flow flue 5 with deduster 3, ensure that the dust removing effects of deduster.
The size of the square opening end of described shunting circumference joint 6 is equal with the outlet size of air preheater 2.This structure further ensures the compactedness of whole system, reduces floor space.
Above-mentioned detailed description of the invention is the preferred embodiments of the present invention, can not limit the present invention, and any of other does not deviate from technical scheme of the present invention and the substitute mode of the change made or other equivalence, is included within protection scope of the present invention.
Claims (6)
1. the flue system for the outlet of thermal power plant tower-type furnace air preheater, comprise out of stock reactor, air preheater, deduster, one-level flue and point flow flue, described out of stock reactor, one-level flue, air preheater, a point flow flue are connected successively with deduster, it is characterized in that: also comprise shunting circumference joint, described point of flow flue is connected with air preheater by shunting circumference joint.
2. the flue system for the outlet of thermal power plant tower-type furnace air preheater according to claim 1, it is characterized in that: described air preheater, deduster and shunting circumference joint all have 2, described point of flow flue has 6, these 6 points of flow flues are one group with 3 and form 2 component flow flues, one end of point flow flue described in 2 groups is connected with 2 air preheaters respectively by 2 shunting circumference joints, and described in 2 groups, the other end of point flow flue is connected with 2 dedusters respectively.
3. the flue system for the outlet of thermal power plant tower-type furnace air preheater according to claim 2, it is characterized in that: described shunting circumference joint comprises 3 first party round knots, these 3 first party round knots arrange compact siro spinning technology successively with one, and the round mouth end of each described first party round knot is tightly connected with one end of point flow flue; The square opening end of 3 described first party round knots connects and is connected with the exit seal of air preheater afterwards.
4. the flue system for the outlet of thermal power plant tower-type furnace air preheater according to claim 2, it is characterized in that: also comprise the second party round knot equal with point flow flue quantity, the other end of described point of flow flue is connected with the entrance of deduster by corresponding second party round knot.
5. the flue system for the outlet of thermal power plant tower-type furnace air preheater according to claim 1, is characterized in that: the size of the square opening end of described shunting circumference joint is equal with the outlet size of air preheater.
6. the flue system for the outlet of thermal power plant tower-type furnace air preheater according to claim 1, is characterized in that: the diameter 4300mm ~ 4800mm of described point of flow flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510830796.8A CN105351954A (en) | 2015-11-25 | 2015-11-25 | Flue system for outlet of tower-type furnace air pre-heater of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510830796.8A CN105351954A (en) | 2015-11-25 | 2015-11-25 | Flue system for outlet of tower-type furnace air pre-heater of thermal power plant |
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| Publication Number | Publication Date |
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| CN105351954A true CN105351954A (en) | 2016-02-24 |
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| CN201510830796.8A Pending CN105351954A (en) | 2015-11-25 | 2015-11-25 | Flue system for outlet of tower-type furnace air pre-heater of thermal power plant |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080028935A1 (en) * | 2004-05-21 | 2008-02-07 | Rune Andersson | Method and Device for the Separation of Dust Particles |
| CN201521979U (en) * | 2009-09-30 | 2010-07-07 | 广东省电力设计研究院 | Three-passage flow uniformizing part |
| CN201715526U (en) * | 2009-08-11 | 2011-01-19 | 浙江省电力设计院 | Connecting device of front flue of dust collector of heat power plant |
| CN103953939A (en) * | 2014-04-28 | 2014-07-30 | 中国能源建设集团广东省电力设计研究院 | Wet desulphurization mechanism |
| CN105042624A (en) * | 2015-08-20 | 2015-11-11 | 中国能源建设集团广东省电力设计研究院有限公司 | Flue-gas and air system and flow guide device, of flue-gas and air system, at cold secondary air inlet of air preheater |
| CN205155998U (en) * | 2015-11-25 | 2016-04-13 | 中国能源建设集团广东省电力设计研究院有限公司 | A flue system for export of tower furnace air heater of thermal power factory |
-
2015
- 2015-11-25 CN CN201510830796.8A patent/CN105351954A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080028935A1 (en) * | 2004-05-21 | 2008-02-07 | Rune Andersson | Method and Device for the Separation of Dust Particles |
| CN201715526U (en) * | 2009-08-11 | 2011-01-19 | 浙江省电力设计院 | Connecting device of front flue of dust collector of heat power plant |
| CN201521979U (en) * | 2009-09-30 | 2010-07-07 | 广东省电力设计研究院 | Three-passage flow uniformizing part |
| CN103953939A (en) * | 2014-04-28 | 2014-07-30 | 中国能源建设集团广东省电力设计研究院 | Wet desulphurization mechanism |
| CN105042624A (en) * | 2015-08-20 | 2015-11-11 | 中国能源建设集团广东省电力设计研究院有限公司 | Flue-gas and air system and flow guide device, of flue-gas and air system, at cold secondary air inlet of air preheater |
| CN205155998U (en) * | 2015-11-25 | 2016-04-13 | 中国能源建设集团广东省电力设计研究院有限公司 | A flue system for export of tower furnace air heater of thermal power factory |
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Application publication date: 20160224 |
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