CN201779684U - High-grade recycling system for exhaust heat of power station boiler - Google Patents
High-grade recycling system for exhaust heat of power station boiler Download PDFInfo
- Publication number
- CN201779684U CN201779684U CN2010202793077U CN201020279307U CN201779684U CN 201779684 U CN201779684 U CN 201779684U CN 2010202793077 U CN2010202793077 U CN 2010202793077U CN 201020279307 U CN201020279307 U CN 201020279307U CN 201779684 U CN201779684 U CN 201779684U
- Authority
- CN
- China
- Prior art keywords
- waste heat
- flue gas
- air
- heat exchanger
- heat recovery
- Prior art date
- 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.)
- Expired - Lifetime
Links
- 238000004064 recycling Methods 0.000 title claims abstract description 11
- 239000002918 waste heat Substances 0.000 claims abstract description 38
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003546 flue gas Substances 0.000 claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 11
- 239000003517 fume Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000740 bleeding effect Effects 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 239000008236 heating water Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Air Supply (AREA)
Abstract
本实用新型属于节能技术领域，特别公开了一种电站锅炉余热高品位回收利用系统。该电站锅炉余热高品位回收利用系统，烟道上按烟气走向依次安装有烟气余热回收二次换热器和烟气余热回收一次换热器，空气鼓风机与空气预热器的连接管道上安装有空气预热一次换热器，空气预热一次换热器、烟气余热回收一次换热器和一次循环水泵组成一个封闭水循环路。本实用新型通过提高空气预热器入口空气温度来提升空气预热器出口烟气温度，从而获得更高的烟气余热回收温度，用于加热给水，做到烟气余热高品位回收利用。
The utility model belongs to the technical field of energy saving, and particularly discloses a high-grade waste heat recycling system of a power station boiler. The high-grade waste heat recovery system for power plant boilers is equipped with flue gas waste heat recovery secondary heat exchanger and flue gas waste heat recovery primary heat exchanger on the flue according to the flue gas direction, and is installed on the connecting pipe between the air blower and the air preheater There is an air preheating primary heat exchanger, an air preheating primary heat exchanger, a flue gas waste heat recovery primary heat exchanger and a primary circulating water pump to form a closed water circulation circuit. The utility model raises the flue gas temperature at the outlet of the air preheater by increasing the air temperature at the inlet of the air preheater, so as to obtain a higher flue gas waste heat recovery temperature, which is used for heating water supply and achieves high-grade recycling of flue gas waste heat.
Description
(1) technical field
The utility model belongs to field of energy-saving technology, particularly a kind of station boiler waste heat high-grade recycling system.
(2) background technology
The best flue-gas temperature of station boiler sweetening process is at 80～90 ℃, but because a variety of causes, the station boiler exhaust gas temperature is at 120～150 ℃ at present, can't further reduce, so the station boiler smoke evacuation will seek out desulfurized effect preferably, flue gas will be lowered the temperature before advancing desulphurization system, promptly there is the higher energy loss of a large amount of grades in this mode, has also increased auxiliary power consumption.
Contain heat energy in the flue gas about how reclaiming, existing at present ripe flue gas waste heat recovery heat exchanger is just utilizing aspect the fume afterheat, unsatisfactory.About how utilizing after this part waste heat recovery in the boiler exhaust gas, a plurality of patents all have narration, but all be to be used to heat condenser condensed water after the boiler exhaust gas waste heat recovery or to be used for external heat supply, for example patent 200910014905.3 disclosed a kind of systems that utilize are used to the boiler exhaust gas waste heat to heat condenser condensed water exactly and are used for external heat supply.
Because the acting ability that low-pressure heater is bled is very low, fume afterheat replaces the part low-pressure heater and bleeds after the mode of heat-setting water enters thermodynamic system of steam tur, overwhelming majority energy will be lost in the environment in cold deep loss mode, and comprehensive utilization ratio is lower.For this mode of external heat supply, be subjected to the restriction of thermic load and heating parameter, be difficult to find appropriate thermal user and thermic load stable throughout the year, lasting.
(3) summary of the invention
The utility model provides a kind of fume afterheat that makes full use of in order to remedy the deficiencies in the prior art, the station boiler smoke discharging residual heat high-grade recycling system of energy-saving and emission-reduction.
The utility model is achieved by the following technical solution:
A kind of station boiler waste heat high-grade recycling system, comprise air preheater that is communicated with boiler flue gas outlet and the air-blaster that is communicated with air preheater, the exhanst gas outlet of air preheater is communicated with chimney by flue, it is characterized in that: by the flue gas trend flue gas waste heat recovery secondary heat exchange device and heat exchanger of flue gas waste heat recovery are installed successively on the described flue, heat exchanger of air preheat is installed, heat exchanger of air preheat on the connecting pipe of air-blaster and air preheater, heat exchanger of flue gas waste heat recovery and a water circulating pump are formed a sealing water circulation road.
The utility model plan as a whole in the whole boiler of thermal power plant, the turbine system thermal energy transfer, utilize process, flue-gas temperature is dropped to below 90 ℃, and the temperature of recovery waste heat is brought up to more than 150 ℃, it is used as the heat exchange energy.
The utility model waste heat recovery form has two kinds:
A kind of is that steam type reclaims, and the water inlet of flue gas waste heat recovery secondary heat exchange device is communicated with the drain port of high-pressure heater, and its steam (vapor) outlet is communicated with the import of bleeding of oxygen-eliminating device;
Another kind is that hot-water type reclaims, and the water inlet of fume afterheat secondary heat exchange device is communicated with the feed pump delivery port, and its delivery port is communicated with the high-pressure heater delivery port.
Above-mentioned dual mode is used to replace the part oxygen-eliminating device with the waste heat that reclaims bleeds, or replaces the part high-pressure heater and bleed, and comes heated feed water, even can suitably improve the air preheater air exit temp, further improves boiler efficiency.
The utility model provides the air preheater exit gas temperature by improving air preheater intake air temperature, thereby obtains higher flue gas waste heat recovery temperature, accomplishes the recycling of fume afterheat high-grade.
(4) description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
The system schematic that Fig. 1 reclaims for the utility model steam type;
The system schematic that Fig. 2 reclaims for the utility model hot-water type.
Among the figure, 1 air preheater, 2 air-blasters, 3 flues, 4 chimneys, 5 flue gas waste heat recovery secondary heat exchange devices, heat exchanger of 6 flue gas waste heat recoveries, heat exchanger of 7 air preheats, No. 8 water circulating pumps, 9 high-pressure heaters, 10 oxygen-eliminating devices, 11 feed pumps, 12 boilers.
(5) specific embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment comprises air preheater 1 that is communicated with boiler 12 exhanst gas outlets and the air-blaster 2 that is communicated with air preheater 1, the exhanst gas outlet of air preheater 1 is communicated with chimney 4 by flue 3, by the flue gas trend flue gas waste heat recovery secondary heat exchange device 5 and heat exchanger 6 of flue gas waste heat recovery are installed successively on the described flue 3, on the connecting pipe of air-blaster 2 and air preheater 1 heat exchanger 7 of air preheat is installed, heat exchanger 7 of air preheat, heat exchanger 6 of flue gas waste heat recovery and 8 one-tenth one sealing of water circulating pump group water circulation road.
Heat exchanger 7 of air preheater, primary side water circulating pump 8, heat exchanger of flue gas waste heat recovery 6 are formed a sealing water circulation road.Heat exchanger 6 of flue gas waste heat recovery is reduced to flue-gas temperature below 90 ℃, and obtains the hot water of proper temperature, under the effect of side water circulating pump 8 successively, hot water is delivered to heat exchanger 7 of air preheat then, and heating enters the air before the air preheater 1.Raise the also corresponding lifting of the exhanst gas outlet temperature of air preheater 1 owing to enter the air themperature of air preheater 1.Flue gas waste heat recovery secondary heat exchange device 5 fume side temperature can improve greatly thus.
Flue gas waste heat recovery secondary heat exchange device 5 heating high-pressure heaters 9 are hydrophobic, and produce the above steam of 0.5MPa, supply with oxygen-eliminating device 10 and utilize, and replace part oxygen-eliminating device 10 and bleed, thereby obtain energy-saving effect.
In addition, but also heated feed water pump 11 exit portion feedwater of flue gas waste heat recovery secondary heat exchange device 5 returns the feedwater of temperature rise to the reasonable temperature to high-pressure heater 9 exits then.Reduce owing to enter the feedwater of high-pressure heater 9, high-pressure heater 9 is bled and also can correspondingly be reduced, thereby obtains energy-saving effect.
Claims (3)
1. station boiler waste heat high-grade recycling system, comprise air preheater (1) that is communicated with boiler (12) exhanst gas outlet and the air-blaster (2) that is communicated with air preheater (1), the exhanst gas outlet of air preheater (1) is communicated with chimney (4) by flue (3), it is characterized in that: described flue (3) is gone up by the flue gas trend flue gas waste heat recovery secondary heat exchange device (5) and a heat exchanger of flue gas waste heat recovery (6) is installed successively, a heat exchanger of air preheat (7) is installed, a heat exchanger of air preheat (7) on the connecting pipe of air-blaster (2) and air preheater (1), a heat exchanger of flue gas waste heat recovery (6) and a water circulating pump (8) are formed a sealing water circulation road.
2. station boiler waste heat high-grade recycling system according to claim 1, it is characterized in that: the water inlet of described flue gas waste heat recovery secondary heat exchange device (5) is communicated with the drain port of high-pressure heater (9), and its steam (vapor) outlet is communicated with the import of bleeding of oxygen-eliminating device (10).
3. station boiler waste heat high-grade recycling system according to claim 1, it is characterized in that: the water inlet of described fume afterheat secondary heat exchange device (5) is communicated with feed pump (11) delivery port, and its delivery port is communicated with high-pressure heater (9) delivery port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202793077U CN201779684U (en) | 2010-08-03 | 2010-08-03 | High-grade recycling system for exhaust heat of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202793077U CN201779684U (en) | 2010-08-03 | 2010-08-03 | High-grade recycling system for exhaust heat of power station boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201779684U true CN201779684U (en) | 2011-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202793077U Expired - Lifetime CN201779684U (en) | 2010-08-03 | 2010-08-03 | High-grade recycling system for exhaust heat of power station boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201779684U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900347A (en) * | 2010-08-03 | 2010-12-01 | 山东泓奥电力科技有限公司 | System for high-grade recycling waste heat of smoke discharged from boiler of power station |
| CN102230615A (en) * | 2011-06-20 | 2011-11-02 | 中国华能集团清洁能源技术研究院有限公司 | Combined type flue gas residual heat comprehensive utilization system |
| CN102444901A (en) * | 2011-11-30 | 2012-05-09 | 辽宁赛沃斯节能技术有限公司 | Coal power plant combined type heat pipe flue gas waste heat recovery system and method |
| CN104235825A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Boiler flue gas waste heat recycling system |
| CN109869705A (en) * | 2017-12-01 | 2019-06-11 | 河北正能锅炉设备有限公司 | A kind of New efficient energy-saving boiler |
-
2010
- 2010-08-03 CN CN2010202793077U patent/CN201779684U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900347A (en) * | 2010-08-03 | 2010-12-01 | 山东泓奥电力科技有限公司 | System for high-grade recycling waste heat of smoke discharged from boiler of power station |
| CN102230615A (en) * | 2011-06-20 | 2011-11-02 | 中国华能集团清洁能源技术研究院有限公司 | Combined type flue gas residual heat comprehensive utilization system |
| CN102230615B (en) * | 2011-06-20 | 2013-02-13 | 中国华能集团清洁能源技术研究院有限公司 | Combined type flue gas residual heat comprehensive utilization system |
| CN102444901A (en) * | 2011-11-30 | 2012-05-09 | 辽宁赛沃斯节能技术有限公司 | Coal power plant combined type heat pipe flue gas waste heat recovery system and method |
| CN104235825A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Boiler flue gas waste heat recycling system |
| CN109869705A (en) * | 2017-12-01 | 2019-06-11 | 河北正能锅炉设备有限公司 | A kind of New efficient energy-saving boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110330 Effective date of abandoning: 20120104 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110330 Effective date of abandoning: 20120104 |