CN103307592A - Low-pressure coal economizer coated by walls of boiler tail flue - Google Patents
Low-pressure coal economizer coated by walls of boiler tail flue Download PDFInfo
- Publication number
- CN103307592A CN103307592A CN2012100703525A CN201210070352A CN103307592A CN 103307592 A CN103307592 A CN 103307592A CN 2012100703525 A CN2012100703525 A CN 2012100703525A CN 201210070352 A CN201210070352 A CN 201210070352A CN 103307592 A CN103307592 A CN 103307592A
- Authority
- CN
- China
- Prior art keywords
- flue
- water
- flue gas
- boiler
- pipe
- 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.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000000779 smoke Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000001556 precipitation Methods 0.000 claims abstract description 4
- 238000003723 Smelting Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000011084 recovery Methods 0.000 claims description 5
- 210000000481 breast Anatomy 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims 1
- 238000005536 corrosion prevention Methods 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002918 waste heat Substances 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Landscapes
- Air Supply (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a low-pressure coal economizer coated by walls of a boiler tail flue. A heated surface is arranged on the peripheral walls of the boiler tail flue (behind the coal economizer or an air preheater and in front of a chimney outlet) to replace the existing steel plate flue; a heat preserving material is coated outside; and the surface layer of a part contacted with flue gas is subjected to wear prevention and low-temperature corrosion prevention treatment. The heated surface is a finned pipe or a polished pipe or a double-layer steel plate jacket, demineralized water or softened water or condensed water is introduced into the heated surface, and water is introduced into a boiler water feeding system (such as a low-temperature coal economizer, a deoxidizing device, a raw water heater and a condensed water pump) or a heat supply network through a header or a parent pipe after being heated by flue gas for other applications. The method (device) is used for recycling residual heat of high-temperature flue gas at the tail parts of all boilers, and can be applied to gas turbines with high exhaust smoke (gas) temperatures, wet vapor generators, kilns and smelting blasts, so that the exhaust gas temperature is lowered, heat loss is reduced, the boiler efficiency is increased, coal consumption is lowered, catching of smoke dust is facilitated, electric precipitation and power consumption of a draught fan are reduced, and energy is saved.
Description
Technical field
The present invention relates to a kind of boiler tail flue gas heat recovery heating boiler feedwater, reduce the technical method of flue gas loss, raising combustion thermal efficiency.
Background technology
Flue gas loss is one of the maximum of the every heat loss of boiler, accounts for the 60%-70% of heat loss, generally speaking, 10 ℃ of the every increases of exhaust gas temperature, flue gas loss increases by 0.6%-1.0%, and coal consumption increases by 1.2%-2.4%.For improving boiler efficiency, reduce flue gas loss, to the utilization of boiler exhaust gas loss, adopt at boiler flue mostly at present and arrange economizer, air preheater, but flue gas through economizer, air preheater heat exchange after, temperature is still up to 130-170 ℃, have up to 200-500 ℃, along with the reinforcement of energy-saving and emission-reduction, arrange that the low-pressure low-temperature economizer is the development in future direction in the air preheater rear pass, this technology has the commercial Application precedent, and effects of energy saving and emission reduction is obvious.But, heating surface adopts coiled pipe more, is arranged in the flue space of deduster, air-introduced machine front and back, and this arrangement has increased smoke evacuation system resistance and air-introduced machine power consumption, even to change big capacity blower fan, secondly, the on-the-spot installation site of heating surface and space are restricted, and difficulty of construction is big, the first cost height, also have cold end corrosion, influence equipment life, do not apply on a large scale as yet at present.
The objective of the invention is at the prior art deficiency, a kind of technical method that is applicable to all boilers (comprising gas turbine, Industrial Stoves, metallurgical smelting furnace, steam generator) afterbody high-temperature flue gas heat recovery is provided.Compared with prior art, this method (device) has waste heat recovery rate height, reduces flue gas loss, reduce coal consumption, improve boiler efficiency, be beneficial to smoke catching, advantage such as reduce electric precipitation and air-introduced machine power consumption, energy savings, investment cost is relative less, the life-span is long, applied widely, economic benefit and market potential are huge, benefit the nation, sharp enterprise, favorable to the people, sharp social.
Summary of the invention
Its technical scheme is: the boiler back end ductwork wall coats the low pressure economizer, comprise heating surface, water system, be arranged in boiler back end ductwork (after economizer or the air preheater, before the chimney breast, contain the electric precipitation chamber) on all around the wall, substitute existing steel plate flue, the external application insulation material, carry out abrasionproof with flue gas contact portion top layer, corrosion-resistant protective treatment, heating surface is extended surface tube or light pipe or double-layer plate chuck, and (end links to each other with water inlet pipe, and an end links to each other with outlet pipe for interior logical demineralized water or demineralized water or condensate water, flowmeter is housed in the system, thermometer, barrier valve, adjust valve), with the hot smoke convection heat exchange in the flue, high-temperature flue-gas is down to below 100 ℃, the feed water system of boiler is inserted (as low-pressure coal saver in water heat absorption back, draining system, oxygen-eliminating device, or draw and use it for anything else condensate pump) or heat supply network.Air gate is equipped with on the header of heating surface or female pipe top, and drain pipe, drain valve are equipped with in the bottom.Heating surface size, shape are made helix or plane according to former flue physical dimension, flue gas flow, temperature difference parameters, site space, or other shape, walk cigarette in the channel space, leak water in the pipe, reclaim heat.Heating surface also can be arranged in air preheater to the flue between the deduster, or air-introduced machine is to the flue of chimney breast, with the low-level (stack-gas) economizer serial or parallel connection in the flue.
Claims (5)
1. the boiler back end ductwork wall coats the low pressure economizer, comprise heating surface, water system, be arranged on the wall of boiler back end ductwork, substitute original steel plate flue, logical demineralized water or demineralized water or condensate water in the heating surface, with hot flue gas surface heat exchanging, after being heated, water enters the feed water system of boiler or heat supply network, this method (device) is applicable to all boiler tail flue gas heat recovery, reduce flue gas loss, improve fuel thermal efficiency, reduce coal consumption, reduce electric precipitation and air-introduced machine power consumption, be beneficial to smoke catching, energy savings.
2. according to claims 1 described heating surface, it is characterized in that: be arranged in boiler back end ductwork (after economizer or the air preheater, before the chimney breast) on all around the wall, substitute existing steel plate flue, the external application insulation material, carry out abrasionproof, anti-low-temperature corrosion processing with the top layer of flue gas contact portion, heating surface (or flue) shape is made helix tube or plane or other shape according to former flue physical dimension, flue gas flow, temperature difference parameters, walk cigarette in the spatial channel, leak water in the pipe.
3. according to claims 1 described heating surface, it is characterized in that: heating surface is fin monowall tube or light pipe or double-layer plate chuck, (end links to each other with water inlet pipe for interior logical demineralized water or demineralized water or condensate water, one end links to each other with outlet pipe, flowmeter is housed in the system, thermometer, barrier valve, adjust valve), with the flue gas heat exchange in the flue, high-temperature flue gas is down to works as temperature, water is connected to the feed water system of boiler (as the flue low-level (stack-gas) economizer by flue gas heating back by header and the female pipe of female pipe, draining system, oxygen-eliminating device, condensate pump) or heat supply network, or draw and use it for anything else, heating surface is connected with header or female pipe, air gate is equipped with on header or female pipe top, and drain pipe is equipped with in the bottom, drain valve.
4. according to claims 1 described heating surface, it is characterized in that: be arranged in air preheater to the flue between the deduster, or air-introduced machine is to the flue of chimney, can with flue in the low-level (stack-gas) economizer series, parallel.
5. coat the low pressure economizer according to claims 1 described boiler back end ductwork wall, it is characterized in that: this method (device) is applicable to but is not limited to all boilers (comprising gas turbine, Industrial Stoves, metallurgical smelting furnace, wet steam generator) afterbody high-temperature flue gas heat recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100703525A CN103307592A (en) | 2012-03-16 | 2012-03-16 | Low-pressure coal economizer coated by walls of boiler tail flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100703525A CN103307592A (en) | 2012-03-16 | 2012-03-16 | Low-pressure coal economizer coated by walls of boiler tail flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103307592A true CN103307592A (en) | 2013-09-18 |
Family
ID=49133109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100703525A Pending CN103307592A (en) | 2012-03-16 | 2012-03-16 | Low-pressure coal economizer coated by walls of boiler tail flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103307592A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2702185Y (en) * | 2004-06-17 | 2005-05-25 | 北京中科通用能源环保有限责任公司 | Sludge burning treating apparatus |
| US20090272114A1 (en) * | 2004-11-29 | 2009-11-05 | Yasuhiro Takeuchi | Heat recovery equipment |
| CN101629713A (en) * | 2009-08-19 | 2010-01-20 | 深圳中兴科扬节能环保股份有限公司 | Flue gas afterheat recovery system |
| CN101737766A (en) * | 2010-01-22 | 2010-06-16 | 西安热工研究院有限公司 | Coal-water boiler exhaust gas residual heat recovery device |
| CN201819198U (en) * | 2010-10-12 | 2011-05-04 | 上海伏波环保设备有限公司 | High and low pressure composite economizer |
| CN201903045U (en) * | 2010-11-08 | 2011-07-20 | 深圳中兴节能环保股份有限公司 | Residual-heat utilization device for tail flue gas of boiler |
| PL210040B1 (en) * | 2007-10-03 | 2011-11-30 | Innowacyjne Przedsiębiorstwo Wielobranżowe Polin Spółka Z Ograniczoną Odpowi | The manner of heating of water, which feeds steam boiler and two-step heater of water, which feeds steam boiler |
-
2012
- 2012-03-16 CN CN2012100703525A patent/CN103307592A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2702185Y (en) * | 2004-06-17 | 2005-05-25 | 北京中科通用能源环保有限责任公司 | Sludge burning treating apparatus |
| US20090272114A1 (en) * | 2004-11-29 | 2009-11-05 | Yasuhiro Takeuchi | Heat recovery equipment |
| PL210040B1 (en) * | 2007-10-03 | 2011-11-30 | Innowacyjne Przedsiębiorstwo Wielobranżowe Polin Spółka Z Ograniczoną Odpowi | The manner of heating of water, which feeds steam boiler and two-step heater of water, which feeds steam boiler |
| CN101629713A (en) * | 2009-08-19 | 2010-01-20 | 深圳中兴科扬节能环保股份有限公司 | Flue gas afterheat recovery system |
| CN101737766A (en) * | 2010-01-22 | 2010-06-16 | 西安热工研究院有限公司 | Coal-water boiler exhaust gas residual heat recovery device |
| CN201819198U (en) * | 2010-10-12 | 2011-05-04 | 上海伏波环保设备有限公司 | High and low pressure composite economizer |
| CN201903045U (en) * | 2010-11-08 | 2011-07-20 | 深圳中兴节能环保股份有限公司 | Residual-heat utilization device for tail flue gas of boiler |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130918 |