CN103375792A - Engine-boiler coupled deep waste heat utilization system for air cooling unit - Google Patents
Engine-boiler coupled deep waste heat utilization system for air cooling unit Download PDFInfo
- Publication number
- CN103375792A CN103375792A CN2013103356723A CN201310335672A CN103375792A CN 103375792 A CN103375792 A CN 103375792A CN 2013103356723 A CN2013103356723 A CN 2013103356723A CN 201310335672 A CN201310335672 A CN 201310335672A CN 103375792 A CN103375792 A CN 103375792A
- Authority
- CN
- China
- Prior art keywords
- heater
- air
- level
- steam
- bled
- 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
Images
Landscapes
- Air Supply (AREA)
Abstract
The invention belongs to the field of energy conservation and emission reduction of thermal power units, and particularly relates to an engine-boiler coupled deep waste heat utilization system for an air cooling unit. The system mainly comprises an air pre-heater, multistage bled steam type air heaters, a feed water heater, a condensed water heater and a low-temperature economizer, the primary bled steam type air heater uses waste steam preheated air, the other bled steam type air heaters use low-level to high-level turbine bled steam preheated air, the heat absorption capacity of the preheated air in the air pre-heater is decreased, the amount of flue gas needed by the air pre-heater is also decreased, residual flue gas is led to a bypass flue parallelly connected with the air pre-heater, the feed water heater and the condensed water heater are arranged in the bypass flue and used for heating feed water and condensed water respectively, and regenerative extraction steam is squeezed out to increase power of a turbine. The system recycles high-parameter waste steam and waste heat of low-level bled steam of the air cooling unit, improves the grade of heat and has fine energy-saving effects.
Description
Technical field
The invention belongs to Energy-saving for Thermal Power Units and reduce discharging the field, particularly a kind of waste heat deep exploitation system of Air-cooled Unit machine stove coupling.
Background technology
In order to reduce the discharging of pollutant, improve efficiency of energy utilization, increasing large capacity fired power generating unit is put into use.But for the poor-water water-deficient area, the power plant water consumption that increases simultaneously along with unit capacity has become a large problem.The main method that solves this difficult problem at present adopts air cooling system exactly, and air cooling is compared with clammy, and outstanding advantage is economized on water exactly, and the air in this system-operating environment comes the condensing turbine steam discharge, can reduce 75% of power plant rate of water make-up.Yet because the back pressure of Air-cooled Unit is higher, the efficiency of cycle is low, thereby causes gross coal consumption rate higher than clammy unit, runs counter to the original intention of the capacity fired power generating unit that has high input.
Summary of the invention
The present invention proposes a kind of waste heat deep exploitation system of Air-cooled Unit machine stove coupling, can rationally recycle exhaust steam in steam turbine and the rudimentary heat that draws gas, waste heat energy is effectively used with the form of optimum.
The technical solution used in the present invention is:
Arrange successively economizer, air preheater, feed-water heater, condensation water heater in the boiler flue of this system, exhaust steam in steam turbine enters condenser hotwell, again successively by passing into economizer behind condensate pump, 7# heater, 6# heater, 5# heater, oxygen-eliminating device, 3# heater, 2# heater, the 1# heater
Before air preheater, arrange the bled steam type air heater of three grades of series connection, first order bled steam type air heater is quoted steam turbine outlet exhaust steam and is added hot-air, second level bled steam type air heater and third level bled steam type air heater quote respectively the 7th grade draw gas and the 6th grade draw gas and add hot-air, the air that is preheated is further heated and leads to boiler furnace at air preheater; The flue gas of economizer exit is divided into two parts, the part air preheater of flowing through, temperature reduces for adding hot-air, and another part enters bypass flue and flow through successively feed-water heater and condensation water heater, leads to dedusting and desulphurization system after two parts flue gas converges; The water side of feed-water heater is in parallel with 1# heater, 2# heater and 3# heater, and feedwater enters the feed-water heater heating from the 3# calorifier inlets through control valve 18, returns the exit of 1# heater; Condensation water heater is then in parallel with the 5# heater, and condensate water enters the condensation water heater heating from the 5# calorifier inlets through control valve 19, returns the exit of 5# heater.
Described first order bled steam type air heater adds hot-air by reclaiming steam turbine outlet exhaust steam heat, and the exhaust steam heat release turns back to condenser hotwell to saturation water.
Cancel described first order bled steam type air heater, the air channel entrance of second level bled steam type air heater is arranged at the Air-Cooling Island top, the air that Air-Cooling Island top temperature is higher directly leads to second level bled steam type air heater and heats.
For the relatively high unit of exhaust gas temperature, the end of described boiler flue arranges low-level (stack-gas) economizer, and the outlet of 7# heater is connected with the entrance of low-level (stack-gas) economizer, and the outlet of low-level (stack-gas) economizer is connected with the entrance of 5# heater.
Beneficial effect of the present invention is:
This system extracts exhaust steam and adds hot-air, has reclaimed the heat of air cooling unit exhaust steam, has introduced simultaneously the rudimentary heat that draws gas of part, thereby has saved the heat that partly is used for the high-temperature flue gas of preheated air.In bypass flue, arrange to water-to-water heat exchanger and condensate water heat exchanger, can reclaim these high-grade fume afterheats and be used for heating parameters higher feedwater and condensate water, squeeze the higher extracted steam from turbine of parameter, increase significantly unit and go out merit.This system has realized the recycling of Air-cooled Unit than high parameter exhaust steam and the rudimentary heat that draws gas, and based on the principle of energy counterpart, cascade utilization, makes the waste heat of whole machine stove be optimized utilization, remarkable in economical benefits.
Description of drawings
Fig. 1 is for using the system architecture schematic diagram of Air-cooled Unit the first case study on implementation of the present invention;
Fig. 2 is for using the system architecture schematic diagram of Air-cooled Unit the second case study on implementation of the present invention.
Number in the figure:
The 1-air preheater; The 2-feed-water heater; The 3-condensation water heater; The 4-low-level (stack-gas) economizer; 5-third level bleeder air heater; 6-second level bled steam type air heater; 7-first order bled steam type air heater; The 8-1# heater; The 9-2# heater; The 10-3# heater; The 11-oxygen-eliminating device; The 12-5# heater; The 13-6# heater; The 14-7# heater; 15-; The 16-condenser hotwell; The 17-economizer; The 18-control valve; The 19-control valve; The 20-control valve; The 21-Air-Cooling Island.
The specific embodiment
The present invention proposes a kind of waste heat deep exploitation system of Air-cooled Unit machine stove coupling.The present invention will be further described below in conjunction with drawings and Examples.
In the system architecture schematic diagram of the first case study on implementation as shown in Figure 1, arrange successively economizer 17, air preheater 1, feed-water heater 2, condensation water heater 3 in system's boiler flue; Exhaust steam in steam turbine enters condenser hotwell 16, more successively by passing into economizer 17 behind condensate pump 15,7 # heater 14,6 # heater 13,5# heater 12, oxygen-eliminating device 11,3 # heater 10,2# heater 9, the 1# heater 8.Its principle is: be furnished with three grades of bled steam type air heaters before air preheater 1, first order bled steam type air heater 7 is quoted steam turbine outlet exhaust steam and is added hot-air, and exhaust steam heat release to saturation water returns condenser hotwell 16; Then air enters second level bled steam type air heater 6, and second level bled steam type air heater 6 is quoted the 7th grade and drawn gas and add hot-air, and the 7th grade of heat release to saturation water that draws gas returns in 7# heater 14 hydrophobic; Then air enters third level bled steam type air heater 5, and third level bled steam type air heater 5 is quoted the 6th grade and drawn gas and add hot-air, and the 6th grade of heat release to saturation water that draws gas returns in 6# heater 13 hydrophobic; After being further heated, air after the intensification leads to boiler furnace in air preheater 1; Flue gas from economizer 17 outlets is divided into two parts, a part is through air preheater 1, temperature reduces for adding hot-air, another part enters bypass flue and flow through successively feed-water heater 2 and condensation water heater 3, and two parts flue gas converges and lead to dedusting and desulphurization system in air preheater 1 exit; The water side of feed-water heater 2 is in parallel with 1 # heater 8,2 # heater 9 and 3# heater 10, and feedwater enters feed-water heater 2 heating from 3# heater 10 porch through control valve 18, returns the exit of 1# heater 8; 3 of condensation water heaters are in parallel with 5# heater 12, and condensate water enters condensation water heater 3 heating from 5# heater 12 porch through control valve 19, return the exit of 5# heater 12.
The end of boiler flue arranges low-level (stack-gas) economizer 4, the outlet of 7# heater 14 is connected with the entrance of low-level (stack-gas) economizer 4, the outlet of low-level (stack-gas) economizer 4 is connected with the entrance of 5# heater 12, feedwater enters condensation water heater 3 heating from 7# heater 14 porch through control valve 20, returns the porch of 5# heater 12.
Fig. 2 is the system architecture schematic diagram of the second case study on implementation, and the difference of this case study on implementation is: omitted the first order bled steam type air heater 7 take exhaust steam as thermal source, the air that enters second level bled steam type air heater 6 directly draws from Air-Cooling Island 21 tops.Because the intake air of the implementation case comes from Air-Cooling Island 21 tops, the intake air temperature is higher, near the design entry temperature of second level bled steam type air heater 6, therefore can obtain and the essentially identical energy-saving effect of the first case study on implementation.
Claims (4)
1. the waste heat deep exploitation system of Air-cooled Unit machine stove coupling, arrange successively economizer (17) in its boiler flue, air preheater (1), feed-water heater (2), condensation water heater (3), exhaust steam in steam turbine enters condenser hotwell (16), again successively by condensate pump (15), 7# heater (14), 6# heater (13), 5# heater (12), oxygen-eliminating device (11), 3# heater (10), 2# heater (9), pass into economizer (17) behind the 1# heater (8), it is characterized in that
Bled steam type air heater in three grades of series connection of the front layout of air preheater (1), first order bled steam type air heater (7) is quoted steam turbine outlet exhaust steam and is added hot-air, second level bled steam type air heater (6) and third level bled steam type air heater (5) quote respectively the 7th grade draw gas and the 6th grade draw gas and add hot-air, the air that is preheated is further heated and leads to boiler furnace at air preheater (1); The flue gas of economizer (17) outlet is divided into two parts, the part air preheater (1) of flowing through, temperature reduces for adding hot-air, another part enters bypass flue and flow through successively feed-water heater (2) and condensation water heater (3), leads to dedusting and desulphurization system after two parts flue gas converges; The water side of feed-water heater (2) is in parallel with 1# heater (8), 2# heater (9) and 3# heater (10), feedwater enters feed-water heater (2) heating from 3# heater (10) porch through control valve 18, returns the exit of 1# heater (8); Condensation water heater (3) is then in parallel with 5# heater (12), and condensate water enters condensation water heater (3) heating from 5# heater (12) porch through control valve 19, returns the exit of 5# heater (12).
2. the waste heat deep exploitation system of a kind of Air-cooled Unit machine stove coupling according to claim 1, it is characterized in that: described first order bled steam type air heater (7) adds hot-air by reclaiming steam turbine outlet exhaust steam heat, and the exhaust steam heat release turns back to condenser hotwell (16) to saturation water.
3. the waste heat deep exploitation system of a kind of Air-cooled Unit machine stove coupling according to claim 1, it is characterized in that: cancel described first order bled steam type air heater (7), the air channel entrance of second level bled steam type air heater (6) is arranged at Air-Cooling Island (21) top, and the air that Air-Cooling Island (21) top temperature is higher directly leads to second level bled steam type air heater (6) and heats.
4. the waste heat deep exploitation system of a kind of Air-cooled Unit machine stove coupling according to claim 1, it is characterized in that: for the relatively high unit of exhaust gas temperature, the end of described boiler flue arranges low-level (stack-gas) economizer (4), the outlet of 7# heater (14) is connected with the entrance of low-level (stack-gas) economizer (4), and the outlet of low-level (stack-gas) economizer (4) is connected with the entrance of 5# heater (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103356723A CN103375792A (en) | 2013-08-05 | 2013-08-05 | Engine-boiler coupled deep waste heat utilization system for air cooling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103356723A CN103375792A (en) | 2013-08-05 | 2013-08-05 | Engine-boiler coupled deep waste heat utilization system for air cooling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103375792A true CN103375792A (en) | 2013-10-30 |
Family
ID=49461325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103356723A Pending CN103375792A (en) | 2013-08-05 | 2013-08-05 | Engine-boiler coupled deep waste heat utilization system for air cooling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103375792A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197306A (en) * | 2014-09-02 | 2014-12-10 | 叶金辉 | Boiler fuel gas waste heat recovery system |
| CN104653242A (en) * | 2013-11-18 | 2015-05-27 | 舒少辛 | Waste heat recovery device for direct air-cooling unit |
| CN105387446A (en) * | 2015-11-26 | 2016-03-09 | 华中科技大学 | Bypass grading coal economizer system with active exhaust gas temperature control function |
| CN106224934A (en) * | 2016-08-31 | 2016-12-14 | 浙江浙能节能科技有限公司 | A kind of Steam Turbine Regenerative System utilizing high-temperature flue gas heat-setting water |
| CN106247314A (en) * | 2016-08-11 | 2016-12-21 | 上海电力学院 | A kind of residual heat from boiler fume recovery system of power station reheating embrittlement |
| CN106765044A (en) * | 2017-01-03 | 2017-05-31 | 华电电力科学研究院 | The system that flue gas in power station boiler multichannel bypasses waste heat classified utilization |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4941973A (en) * | 1980-06-25 | 1990-07-17 | Hitachi, Ltd. | Apparatus for removing iron oxides from water in feed water system of a power plant |
| US20080236616A1 (en) * | 2007-03-27 | 2008-10-02 | Boyle Energy Services & Technology, Inc. | Method and apparatus for commissioning power plants |
| CN102401393A (en) * | 2010-09-07 | 2012-04-04 | 上海成信建业节能科技有限公司 | Exhaust waste heat recycling system of power plant boiler |
| WO2012042101A1 (en) * | 2010-09-30 | 2012-04-05 | Åf-Consult Oy | Method for recovering heat from flue gas and steam power plant |
| CN202328165U (en) * | 2011-10-24 | 2012-07-11 | 中国电力工程顾问集团华东电力设计院 | Smoke energy cascaded utilization system and thermal power generator set adopting same |
| CN202484963U (en) * | 2012-02-10 | 2012-10-10 | 福建成信绿集成有限公司 | Quality improvement and gradual utilization system of waste heat of boiler smoke of heat-engine plant |
| CN102759096A (en) * | 2012-07-24 | 2012-10-31 | 西安交通大学 | Smoke waste heat utilization system |
| CN102767821A (en) * | 2012-06-27 | 2012-11-07 | 华北电力大学 | Smoke waste heat deep utilization system of power station boiler for heating supplied water at high pressure |
| CN202647717U (en) * | 2012-07-19 | 2013-01-02 | 中国电力工程顾问集团华东电力设计院 | Thermal power plant waste heat utilization system and thermal power generating unit |
| CN103062754A (en) * | 2012-12-28 | 2013-04-24 | 华北电力大学 | Power station machine furnace integrated cold end comprehensive optimization system |
| CN103104907A (en) * | 2013-01-31 | 2013-05-15 | 华北电力大学 | Heating structure and heating method of boiler based on partitioned flue and multistage air preheating |
-
2013
- 2013-08-05 CN CN2013103356723A patent/CN103375792A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4941973A (en) * | 1980-06-25 | 1990-07-17 | Hitachi, Ltd. | Apparatus for removing iron oxides from water in feed water system of a power plant |
| US20080236616A1 (en) * | 2007-03-27 | 2008-10-02 | Boyle Energy Services & Technology, Inc. | Method and apparatus for commissioning power plants |
| CN102401393A (en) * | 2010-09-07 | 2012-04-04 | 上海成信建业节能科技有限公司 | Exhaust waste heat recycling system of power plant boiler |
| WO2012042101A1 (en) * | 2010-09-30 | 2012-04-05 | Åf-Consult Oy | Method for recovering heat from flue gas and steam power plant |
| CN202328165U (en) * | 2011-10-24 | 2012-07-11 | 中国电力工程顾问集团华东电力设计院 | Smoke energy cascaded utilization system and thermal power generator set adopting same |
| CN202484963U (en) * | 2012-02-10 | 2012-10-10 | 福建成信绿集成有限公司 | Quality improvement and gradual utilization system of waste heat of boiler smoke of heat-engine plant |
| CN102767821A (en) * | 2012-06-27 | 2012-11-07 | 华北电力大学 | Smoke waste heat deep utilization system of power station boiler for heating supplied water at high pressure |
| CN202647717U (en) * | 2012-07-19 | 2013-01-02 | 中国电力工程顾问集团华东电力设计院 | Thermal power plant waste heat utilization system and thermal power generating unit |
| CN102759096A (en) * | 2012-07-24 | 2012-10-31 | 西安交通大学 | Smoke waste heat utilization system |
| CN103062754A (en) * | 2012-12-28 | 2013-04-24 | 华北电力大学 | Power station machine furnace integrated cold end comprehensive optimization system |
| CN103104907A (en) * | 2013-01-31 | 2013-05-15 | 华北电力大学 | Heating structure and heating method of boiler based on partitioned flue and multistage air preheating |
Non-Patent Citations (1)
| Title |
|---|
| 魏高升等: "火电厂直接空冷凝汽器出口热空气作为锅炉燃烧用风的综合分析", 《现代电力》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653242A (en) * | 2013-11-18 | 2015-05-27 | 舒少辛 | Waste heat recovery device for direct air-cooling unit |
| CN104653242B (en) * | 2013-11-18 | 2016-08-24 | 舒少辛 | A kind of Direct Air-cooled Unit waste-heat recovery device |
| CN104197306A (en) * | 2014-09-02 | 2014-12-10 | 叶金辉 | Boiler fuel gas waste heat recovery system |
| CN105387446A (en) * | 2015-11-26 | 2016-03-09 | 华中科技大学 | Bypass grading coal economizer system with active exhaust gas temperature control function |
| CN106247314A (en) * | 2016-08-11 | 2016-12-21 | 上海电力学院 | A kind of residual heat from boiler fume recovery system of power station reheating embrittlement |
| CN106224934A (en) * | 2016-08-31 | 2016-12-14 | 浙江浙能节能科技有限公司 | A kind of Steam Turbine Regenerative System utilizing high-temperature flue gas heat-setting water |
| CN106765044A (en) * | 2017-01-03 | 2017-05-31 | 华电电力科学研究院 | The system that flue gas in power station boiler multichannel bypasses waste heat classified utilization |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103062754B (en) | Power station machine furnace integrated cold end comprehensive optimization system | |
| CN103375792A (en) | Engine-boiler coupled deep waste heat utilization system for air cooling unit | |
| CN103244944B (en) | Air preheating system and method performing steam extraction by utilizing steam turbine | |
| CN105157010A (en) | Coal-fired power generation system based on bypass flue at tail part of boiler | |
| EP2937528B1 (en) | Combined cycle power plant with improved efficiency | |
| CN103486567A (en) | Boiler-turbine coupled flue gas waste heat utilization system capable of preheating air based on condensed water | |
| CN104390388A (en) | Steam type spraying-dead steam direct absorption type compound heat pump system | |
| CN103398369A (en) | Method and system for comprehensive utilization of tail heat of boiler | |
| CN103574587B (en) | Waste heat utilizing system of thermal power plant and thermal power unit | |
| CN210197332U (en) | Cascade utilization deep coupling system for smoke, wind and sewage waste heat of coal-fired boiler | |
| CN102454980A (en) | Method for recycling flue gas waste heat of thermal power plant boiler | |
| CN105627289B (en) | Low-level (stack-gas) economizer combines steam air heater cyclic utilization system | |
| CN102607011A (en) | Multi-stage utilization system for transferring exhaust afterheat energy of power station boiler | |
| CN104895631A (en) | Air-steam combined circulating device and air turbine circulating device | |
| CN102022145B (en) | Steam exhaust waste heat recovery unit | |
| CN102401369A (en) | Method for improving quality of recyclable exhaust waste heat in power plant boiler and progressively utilizing exhaust waste heat | |
| CN101638998B (en) | Front-end double pressure heat absorbing and heat returning circulating thermal system for thermal generator set | |
| CN106322357A (en) | Thermal power generation system based on boiler tail bypass flue | |
| CN203671577U (en) | Efficient waste heat recovery system of machine and boiler coupled air cooling power station | |
| CN203249228U (en) | Air pre-heating system extracting steam through steam turbine | |
| CN109519244A (en) | A kind of surplus heat of power plant effective utilization system of machine furnace coupling technique in conjunction with Organic Rankine Cycle | |
| CN202915334U (en) | Multilevel utilization system for exhausted smoke waste heat energy transfer of utility boiler | |
| CN106439778B (en) | The straight unit cold wind step heating system of ultra supercritical and method | |
| CN105698161A (en) | Coal-fired power plant energy level matching heat integration system based on primary air | |
| CN202484963U (en) | Quality improvement and gradual utilization system of waste heat of boiler smoke of heat-engine plant |
Legal Events
| 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: 20131030 |