CN202419677U - Dry slagging cooling air processing system - Google Patents
Dry slagging cooling air processing system Download PDFInfo
- Publication number
- CN202419677U CN202419677U CN2011204070359U CN201120407035U CN202419677U CN 202419677 U CN202419677 U CN 202419677U CN 2011204070359 U CN2011204070359 U CN 2011204070359U CN 201120407035 U CN201120407035 U CN 201120407035U CN 202419677 U CN202419677 U CN 202419677U
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- hot air
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- dried
- slag extractor
- slag
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Abstract
The utility model relates to a dry slagging cooling air processing system which comprises a dry slag extractor, a boiler and a hot air pumping pipeline. One end of the hot air pumping pipeline is connected with the tail portion of the horizontal section of the dry slag extractor, the other end of the hot air pumping pipeline is connected with a flue of a dust separator, and the hot air pumping pipeline is used for pumping a large amount of hot air heated by high-temperature slag in the dry slag extractor into the flue of the dust separator under negative pressure of the dust separator. The dry slagging cooling air processing system is simple in distribution, convenient to install and easy to achieve, does not need to add large power equipment, and is convenient to overhaul and maintain, low in cost and capable of reasonably distributing hot air and improving operation efficiency of the boiler under the premise of ensuring normal slag cooling.
Description
Technical field
The utility model relates to the cooling air treatment system, particularly a kind of cooling air treatment system that is applied in the dried slag extractor in thermal power plant.
Background technology
In the dried dreg removing system in thermal power plant; Dried dreg removing system mainly comprises dried slag extractor and is attached thereto the air-supply arrangement that connects; Dried slag extractor is installed in the below of boiler usually; Dried slag extractor top is provided with the conveying steel band, and dried slag extractor comprises slag receiving system and the dried slag extractor slope expending section and dried slag extractor horizontal segment three parts that connect through the conveying steel band with it.The high temperature furnace slag of boiler drops on the dried slag extractor slag receiving system of furnace bottom through the boiler slag bucket, then through carrying steel band to see off.Big furnace clinker then through after fully burning, is handled through precrushing, drops on the conveying steel band of slag conveyer again.See the cold slag that the high temperature furnace slag in the process is become can directly store and transport by air cooling off on dried slag extractor horizontal segment.Dried slag extractor horizontal segment is the main region that cooling air and high temperature furnace slag carry out heat exchange, and cooling air is a negative pressure of being utilized boiler furnace by air-supply arrangement, from the air inlet entering internal system of dried slag extractor.Be heated into temperature by slag at the terminal cooling air of dried slag extractor horizontal segment and be about the hot-air about 300 ~ 400 ℃; Hot-air can get into burner hearth by direct furnace bottom from boiler; The heat of further hot slag being taken away from boiler is taken back in the burner hearth once more, thereby reduces the thermal loss of boiler.
According to the requirement of dried dreg removing system runnability, when the maximum cooling wind-heat air capacity that gets into boiler furnace be no more than the boiler combustion air capacity 1% the time, the hot-air that gets into burner hearth can improve the operational efficiency of boiler effectively; And when the quantity of hot air that gets into burner hearth surpass the combustion air amount 1% the time, can reduce the operational efficiency of boiler on the contrary.But in actual motion, because the instability of coal, bed drain purge presents the trend that continues to increase, and is used for the air capacity of cooled slag also constantly to increase, get into burner hearth hot blast rate so that can corresponding increasing, thereby had a strong impact on the operational efficiency of boiler.And because the increasing of quantity of hot air has caused the insufficient of heat exchange, cause the air themperature that gets into burner hearth very low in the boiler, directly reduce the efficient of boiler.
The utility model content
The utility model technical issues that need to address are to present growing bed drain purge a kind of demand that can either satisfy the air cooling slag to be provided, and can effectively improve the dried deslagging cooling air treatment system of boiler operating efficiency again.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is:
Dried deslagging cooling air treatment system comprises dried slag extractor, boiler and takes out hot air duct, and a said end of taking out hot air duct is connected with the afterbody of dried slag extractor horizontal segment, and the other end connects to be used to takes out the deduster that hot air duct produces negative pressure.
The improvement of the utility model is: said taking out is provided with in the hot air duct and the loop-coupled pipe heat exchanger of boiler feedwater low-temperature zone; The water return pipeline in boiler feedwater low-temperature zone loop connects the outlet side of pipe heat exchanger, and the waterpipe that comes in boiler feedwater low-temperature zone loop connects the inlet end of pipe heat exchanger.
Because the technological progress of having adopted technique scheme, the utility model to obtain is:
The utility model is taken out hot air duct through the afterbody setting at the horizontal segment of dried slag extractor; Realized the shunting of the hot-air of original dried dreg removing system; On the basis that guarantees the reliable cooling of growing slag; Reduce the quantity of hot air that gets into boiler furnace, avoided a large amount of hot-airs to get into the boiler operating efficiency reduction that burner hearth causes.The utility model in taking out hot air duct, be provided with the loop-coupled pipe heat exchanger of boiler feedwater, can hot-air and boiler feedwater be carried out heat exchange, realize the recovery of heat, further effectively utilize the heat in the hot-air.That the utility model is arranged is simple, easy for installation, be easy to realize that need not increase large-sized power plant, repair and maintenance is convenient; Cost is lower; Under the prerequisite that guarantees normal cooled slag, reasonable diffluence hot-air, the operational efficiency of raising boiler; Can be widely used in the 300MW level, in 600MW level and even the more senior unit.
Description of drawings
Fig. 1: the structural representation of the utility model.
Wherein: 1. dried slag extractor slope expending section, 2. dried slag extractor horizontal segment, 3. dried slag extractor air inlet, 4. boiler is 5. taken out hot air duct, 6. pipe heat exchanger, 7. deduster, 8. boiler feedwater water return pipeline, 9. boiler feedwater comes waterpipe.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further explain:
A kind of dried deslagging cooling air treatment system is as shown in Figure 1, mainly comprises dried slag extractor, boiler 4 and takes out hot air duct 5.An end of taking out hot air duct is connected with the afterbody of dried slag extractor horizontal segment 2, and the other end is connected with the flue of deduster 7, is used under the negative pressure of deduster, and a large amount of hot-airs by the high temperature furnace slag heating in the dried slag extractor are drawn in the flue of deduster.
For rationally utilizing the heat of the hot-air of taking out the hot air duct extraction, pipe heat exchanger 6 has been installed in taking out hot air duct in the utility model.The waterpipe that comes in boiler feedwater low-temperature zone loop connects the inlet end of pipe heat exchanger; The water return pipeline in boiler feedwater low-temperature zone loop connects the outlet side of pipe heat exchanger so that the cold water in the boiler feedwater low-temperature zone loop in pipe heat exchanger fully and hot-air carry out exchange heat.
Claims (2)
1. dried deslagging cooling air treatment system; Comprise dried slag extractor and boiler (4); It is characterized in that: also comprise and take out hot air duct (5); A said end of taking out hot air duct is connected with the afterbody of dried slag extractor horizontal segment (2), and the other end connects to be used to takes out the deduster (7) that hot air duct produces negative pressure.
2. dried deslagging cooling air treatment system according to claim 1 is characterized in that: said taking out is provided with in the hot air duct (5) and the loop-coupled pipe heat exchanger of boiler feedwater low-temperature zone (6); The water return pipeline in boiler feedwater low-temperature zone loop connects the outlet side of pipe heat exchanger, and the waterpipe that comes in boiler feedwater low-temperature zone loop connects the inlet end of pipe heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204070359U CN202419677U (en) | 2011-10-24 | 2011-10-24 | Dry slagging cooling air processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204070359U CN202419677U (en) | 2011-10-24 | 2011-10-24 | Dry slagging cooling air processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202419677U true CN202419677U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204070359U Expired - Lifetime CN202419677U (en) | 2011-10-24 | 2011-10-24 | Dry slagging cooling air processing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202419677U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075738A (en) * | 2013-03-01 | 2013-05-01 | 圣火科技(河南)有限责任公司 | Transformation method of air-cooling dry slag discharging system of pulverized coal boiler |
| CN104132355A (en) * | 2014-07-25 | 2014-11-05 | 国家电网公司 | Dry-type deslagging system capable of adjusting cooling air |
| CN105020726A (en) * | 2015-07-28 | 2015-11-04 | 南京电力设备质量性能检验中心 | Device for recovering hot air of dry type slag removal machine and reducing disorganized air leakage of bottom of hearth and application thereof |
| CN105114947A (en) * | 2015-09-18 | 2015-12-02 | 青岛达能环保设备股份有限公司 | Stepped cooling slag discharging method for bottom slags of circulating fluidized bed boiler |
| CN107741021A (en) * | 2017-10-31 | 2018-02-27 | 史震伟 | A kind of air-cooled slag drying machine clinker sensible heat reclaiming system |
| CN108775593A (en) * | 2018-04-09 | 2018-11-09 | 华中科技大学 | A kind of dried slag removing waste heat recovery device |
| CN109373339A (en) * | 2018-10-31 | 2019-02-22 | 西安热工研究院有限公司 | A kind of dry deslagging protection system and its working method |
| CN111290447A (en) * | 2019-12-18 | 2020-06-16 | 国家能源集团谏壁发电厂 | Air leakage control system of dry slag extractor of power plant |
| CN111649347A (en) * | 2020-06-19 | 2020-09-11 | 陕西科技大学 | Environment-friendly automatic slag discharging device for decoupling coal-fired hot-blast stove |
-
2011
- 2011-10-24 CN CN2011204070359U patent/CN202419677U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075738A (en) * | 2013-03-01 | 2013-05-01 | 圣火科技(河南)有限责任公司 | Transformation method of air-cooling dry slag discharging system of pulverized coal boiler |
| CN104132355A (en) * | 2014-07-25 | 2014-11-05 | 国家电网公司 | Dry-type deslagging system capable of adjusting cooling air |
| CN105020726A (en) * | 2015-07-28 | 2015-11-04 | 南京电力设备质量性能检验中心 | Device for recovering hot air of dry type slag removal machine and reducing disorganized air leakage of bottom of hearth and application thereof |
| CN105114947A (en) * | 2015-09-18 | 2015-12-02 | 青岛达能环保设备股份有限公司 | Stepped cooling slag discharging method for bottom slags of circulating fluidized bed boiler |
| CN107741021A (en) * | 2017-10-31 | 2018-02-27 | 史震伟 | A kind of air-cooled slag drying machine clinker sensible heat reclaiming system |
| CN107741021B (en) * | 2017-10-31 | 2019-07-23 | 史震伟 | A kind of air-cooled slag drying machine clinker sensible heat reclaiming system |
| CN108775593A (en) * | 2018-04-09 | 2018-11-09 | 华中科技大学 | A kind of dried slag removing waste heat recovery device |
| CN109373339A (en) * | 2018-10-31 | 2019-02-22 | 西安热工研究院有限公司 | A kind of dry deslagging protection system and its working method |
| CN111290447A (en) * | 2019-12-18 | 2020-06-16 | 国家能源集团谏壁发电厂 | Air leakage control system of dry slag extractor of power plant |
| CN111649347A (en) * | 2020-06-19 | 2020-09-11 | 陕西科技大学 | Environment-friendly automatic slag discharging device for decoupling coal-fired hot-blast stove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |