CN109210561A - Power station boiler air pre-heater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization - Google Patents
Power station boiler air pre-heater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization Download PDFInfo
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- CN109210561A CN109210561A CN201811246441.4A CN201811246441A CN109210561A CN 109210561 A CN109210561 A CN 109210561A CN 201811246441 A CN201811246441 A CN 201811246441A CN 109210561 A CN109210561 A CN 109210561A
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- Prior art keywords
- low
- heater
- air
- heat exchanger
- flue gas
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
-
- 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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
Abstract
The invention discloses the association systems that a kind of power station boiler air pre-heater mentions effect coupling low-grade flue gas heat recovery and utilization.The association system, including air preheater, deduster, absorption tower have been sequentially arranged along flow of flue gas direction on the flue at air preheater rear, it is characterized by: being disposed with the high-temperature section heat exchanger between air preheater outlet and deduster entrance in the flue, and the low-temperature zone heat exchanger before absorption tower；The air heater being disposed in cold air duct in front of air preheater entrance；High-temperature section heat exchanger is in parallel with main condensate water system, and low-temperature zone heat exchanger and air heater form open system.Structure of the invention design rationally, can reduce air preheater outlet smoke temperature, improve boiler efficiency and effectively solve the problems, such as to cause because air preheater outlet flue reduces, while be recycled to low-grade flue gas heat.
Description
(1) technical field
The present invention relates to preheaters to propose effect, flue gas heat recycling field, in particular to a kind of power station boiler air pre-heater proposes effect
Couple the association system of low-grade flue gas heat recovery and utilization.
(2) background technique
Currently, coal-burning boiler exhaust gas temperature design value is generally at 120-130 DEG C, but there are flue gases for the hollow air preheater of big multicomputer
The problems such as resistance is higher, exhaust gas temperature is more than design value, air preheater outlet smoke temperature increases, and boiler efficiency is caused to reduce.Cause
This, need to carry out air preheater to propose effect.But after proposing effect, air preheater outlet smoke temperature is reduced, and leads to air preheater cold-end air
The problems such as integrated temperature reduces, ammonium hydrogen sulfate corrosion aggravates, the energy level of fume afterheat reduces, the effect of UTILIZATION OF VESIDUAL HEAT IN is deteriorated.
In addition, air preheater carries out after proposing effect, even if exhaust gas temperature is reduced to design value, still contain in flue gas larger
Energy loss.
(3) summary of the invention
In order to compensate for the shortcomings of the prior art, the present invention provides a kind of reduction air preheater outlet smoke temperature, improve boiler effect
Rate, energy-saving and emission-reduction, power station boiler air pre-heater safe and reliable to operation mention effect coupling low-grade flue gas heat recovery and utilization
Association system.
The present invention is achieved through the following technical solutions:
A kind of power station boiler air pre-heater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization, including air is pre-
Hot device has been sequentially arranged deduster, absorption tower along flow of flue gas direction on the flue at air preheater rear, it is characterised in that:
The high-temperature section heat exchanger being disposed in the flue between air preheater outlet and deduster entrance, and be located at and absorb
Low-temperature zone heat exchanger before tower；The air heater being disposed in cold air duct in front of air preheater entrance；High temperature section is changed
Hot device is in parallel with main condensate water system, and low-temperature zone heat exchanger and air heater form open system.
The fume afterheat of recycling is divided into three parts by the present invention, and first part proposes effect by air preheater to improve pot
The efficiency of furnace；Second part enters furnace wind-warm syndrome and boiler efficiency by low-temperature zone heat exchanger and low pressure condensation water circularly enhancing, is promoted empty
Air preheater exports smoke temperature and obtains high level fume afterheat, while improves air preheater cold-end air integrated temperature；Part III
Steam turbine condensed water, gain coal consumption saving are heated by the high level fume afterheat that high-temperature section heat exchanger absorbs.
More excellent technical solution of the invention are as follows:
The main condensate water system include by concatenated No. 8 low-pressure heaters of condensing water conduit, No. 7 low-pressure heaters, No. 6 it is low
Heater and No. 5 low-pressure heaters are pressed, wherein No. 8 low-pressure heaters and No. 7 low-pressure heaters are unitized, condensate pipe
Condensate pump is installed on road.
The water inlet line of the high-temperature section heat exchanger is respectively communicated with the condensation water inlet and No. 7 low pressure of No. 8 low-pressure heaters
The condensation water out of heater, and high temperature section inlet adjusting valve, high temperature section import motor-driven valve and high temperature are installed on water inlet line
Section booster；The outlet conduit of high-temperature section heat exchanger is connected to the entrance of No. 5 low-pressure heaters, and high temperature is equipped on outlet conduit
Duan Huishui motor-driven valve.
The water inlet line of the low-temperature zone heat exchanger is respectively communicated with the condensation water inlet and No. 7 low pressure of No. 8 low-pressure heaters
The condensation water out of heater is equipped with low-temperature zone inlet adjusting valve, low-temperature zone import motor-driven valve and low-temperature zone on water inlet line
Booster；The water inlet line of the outlet conduit connection air heater of low-temperature zone heat exchanger.
The outlet conduit of the air heater is connected to the pipeline of the main condensate water system before No. 8 low-pressure heaters, and
Air heater return water motor-driven valve is installed on outlet conduit.
By the connection of above-mentioned inlet and outlet pipe lines, high-temperature section heat exchanger, low-temperature zone heat exchanger and main condensate water system are realized
Heat exchange arrangement, take raised technology path after first reducing to air preheater outlet smoke temperature, realize air preheater and mention
The direct-coupling that effect is promoted with energy level, to obtain maximum energy-saving benefit.
Structure of the invention design rationally, can reduce air preheater outlet smoke temperature, improve boiler efficiency and effectively solve
The problem of certainly causing because of the reduction of air preheater outlet smoke temperature, while low-grade flue gas heat is recycled, it improves
The security reliability of air preheater, obtains preferable economic benefit.
(4) Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is the structural diagram of the present invention.
In figure, 1 air preheater, 2 high temperature section inlet adjusting valves, 3 high temperature section import motor-driven valves, 4 high temperature section boosters, 5
High-temperature section heat exchanger, 6 high temperature section return water motor-driven valves, 7 low-temperature zone inlet adjusting valves, 8 low-temperature zone import motor-driven valves, 9 low-temperature zone liters
Press pump, 10 low-temperature zone heat exchangers, 11 air heaters, 12 air heater return water motor-driven valves, 13 No. 8 low-pressure heaters, 14 7
Number low-pressure heater, 15 No. 6 low-pressure heaters, 16 No. 5 low-pressure heaters, 17 condensate pumps, 18 dedusters, 19 absorption towers.
(5) specific embodiment
Attached drawing is a kind of specific embodiment of the invention.The embodiment includes air preheater 1, the cigarette at 1 rear of air preheater
It has been sequentially arranged deduster 18, absorption tower 19 along flow of flue gas direction on road, has been disposed in the flue positioned at air preheater 1
High-temperature section heat exchanger 5 between outlet and 18 entrance of deduster, and the low-temperature zone heat exchanger 10 before absorption tower 19；Cold wind
The air heater 11 being disposed in road in front of 1 entrance of air preheater；High-temperature section heat exchanger 5 and main condensate water system are simultaneously
Connection, low-temperature zone heat exchanger 10 and air heater 11 form open system.
The main condensate water system includes passing through 13, No. 7 low-pressure heaters of concatenated No. 8 low-pressure heaters of condensing water conduit
14, No. 6 low-pressure heater 15 and No. 5 low-pressure heaters 16, wherein No. 8 low-pressure heater 13 and No. 7 low-pressure heaters 14 are group
Integral type is closed, condensate pump 17 is installed on condensing water conduit.
Air preheater 1 carries out proposing effect, increases root diameter and height, selects suitable heat accumulating element pattern, to guarantee
Heat exchange efficiency and circulating resistance are in optimal balance point, while being transformed to its sealing system.
5 Inlet water of high-temperature section heat exchanger is derived from No. 8 13 entrances of low-pressure heater and No. 7 low-pressure heaters 14 export, and relies on
High temperature section inlet adjusting valve 2 adjusts its inlet water temperature, absorbs flue gas to high-temperature section heat exchanger 5 after the boosting of high temperature section booster 4
After waste heat, it is back to No. 5 16 entrances of low-pressure heater.High-temperature section heat exchanger 5 exports smoke temperature and passes through 4 frequency conversion tune of high temperature section booster
Section.
10 Inlet water of low-temperature zone heat exchanger is derived from No. 8 13 entrances of low-pressure heater and No. 7 low-pressure heaters 14 export, and relies on
Low-temperature zone inlet adjusting valve 7 adjusts its inlet water temperature, absorbs flue gas to low-temperature zone heat exchanger 10 after the boosting of low-temperature zone booster 9
After waste heat, into air heater 11, after heating furnace cold wind, it is back to No. 8 13 entrances of low-pressure heater.Low-temperature zone heat exchanger 10
It exports smoke temperature and passes through 9 variable frequency adjustment of low-temperature zone booster.
Air preheater 1 reduces exhaust gas temperature to design value by proposing effect, this reduces coal consumption 1.5g/kWh(boiler efficiency
Improve 0.5 percentage point)；The fume afterheat and final stage steam turbine condensed water that low-temperature zone heat exchanger 10 absorbs pass through air heater
11 heat jointly into furnace cold wind, this reduces coal consumption 1.9g/kWh(boiler efficiency and improve 0.6 percentage point)；High-temperature section heat exchanger
5, which absorb high level fume afterheat, heats steam turbine condensed water, issues additional electric work, this reduces coal consumption 1.65g/kWh.
In addition to the technical characteristic described in the specification, remaining technical characteristic is technology known to those skilled in the art.
Claims (5)
1. a kind of power station boiler air pre-heater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization, including air
Preheater (1) has been sequentially arranged deduster (18), absorption tower along flow of flue gas direction on the flue at air preheater (1) rear
(19), it is characterised in that: the height being disposed in the flue between air preheater (1) outlet and deduster (18) entrance
Temperature section heat exchanger (5), and it is located at the low-temperature zone heat exchanger (10) before absorption tower (19)；It is disposed in cold air duct pre- positioned at air
Air heater (11) in front of hot device (1) entrance；High-temperature section heat exchanger (5) is in parallel with main condensate water system, low-temperature zone heat exchange
Device (10) and air heater (11) form open system.
2. the connection that power station boiler air pre-heater according to claim 1 mentions effect coupling low-grade flue gas heat recovery and utilization
Collaboration system, it is characterised in that: the main condensate water system includes passing through concatenated No. 8 low-pressure heaters (13) of condensing water conduit, 7
Number low-pressure heater (14), No. 6 low-pressure heaters (15) and No. 5 low-pressure heaters (16), wherein No. 8 low-pressure heaters (13) and
No. 7 low-pressure heaters (14) be it is unitized, condensate pump (17) are installed on condensing water conduit.
3. the connection that power station boiler air pre-heater according to claim 2 mentions effect coupling low-grade flue gas heat recovery and utilization
Collaboration system, it is characterised in that: the water inlet line of the high-temperature section heat exchanger (5) is respectively communicated with the solidifying of No. 8 low-pressure heaters (13)
The condensation water out of entrance and No. 7 low-pressure heaters (14) is born water, and high temperature section inlet adjusting valve is installed on water inlet line
(2), high temperature section import motor-driven valve (3) and high temperature section booster (4)；The outlet conduit of high-temperature section heat exchanger (5) is connected to No. 5 low pressure
The entrance of heater (16), and high temperature section return water motor-driven valve (6) is installed on outlet conduit.
4. the connection that power station boiler air pre-heater according to claim 2 mentions effect coupling low-grade flue gas heat recovery and utilization
Collaboration system, it is characterised in that: the water inlet line of the low-temperature zone heat exchanger (10) is respectively communicated with the solidifying of No. 8 low-pressure heaters (13)
Bear water the condensation water out of entrance and No. 7 low-pressure heaters (14), be equipped on water inlet line low-temperature zone inlet adjusting valve (7),
Low-temperature zone import motor-driven valve (8) and low-temperature zone booster (9)；The outlet conduit of low-temperature zone heat exchanger (10) is connected to air heater
(11) water inlet line.
5. the connection that power station boiler air pre-heater according to claim 2 mentions effect coupling low-grade flue gas heat recovery and utilization
Collaboration system, it is characterised in that: the master before the outlet conduit of the air heater (11) is connected to No. 8 low-pressure heaters (13) is solidifying
The pipeline of system is born water, and air heater return water motor-driven valve (12) is installed on outlet conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246441.4A CN109210561A (en) | 2018-10-25 | 2018-10-25 | Power station boiler air pre-heater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246441.4A CN109210561A (en) | 2018-10-25 | 2018-10-25 | Power station boiler air pre-heater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization |
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| Publication Number | Publication Date |
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| CN109210561A true CN109210561A (en) | 2019-01-15 |
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ID=64997170
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811246441.4A Pending CN109210561A (en) | 2018-10-25 | 2018-10-25 | Power station boiler air pre-heater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508765A (en) * | 2022-02-16 | 2022-05-17 | 扬州金桃化工设备有限公司 | Combined high-efficiency air preheater and preheating method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5687674A (en) * | 1993-05-10 | 1997-11-18 | Saarbergwerke Aktiengesellschaft | Steam power plant for generating electric power |
| CN106439878A (en) * | 2016-05-17 | 2017-02-22 | 山东泓奥电力科技有限公司 | Flue gas waste heat utilizing system of condensed water heating boiler for air supply |
| CN209196907U (en) * | 2018-10-25 | 2019-08-02 | 华电新乡发电有限公司 | Air preheater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization |
-
2018
- 2018-10-25 CN CN201811246441.4A patent/CN109210561A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5687674A (en) * | 1993-05-10 | 1997-11-18 | Saarbergwerke Aktiengesellschaft | Steam power plant for generating electric power |
| CN106439878A (en) * | 2016-05-17 | 2017-02-22 | 山东泓奥电力科技有限公司 | Flue gas waste heat utilizing system of condensed water heating boiler for air supply |
| CN209196907U (en) * | 2018-10-25 | 2019-08-02 | 华电新乡发电有限公司 | Air preheater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508765A (en) * | 2022-02-16 | 2022-05-17 | 扬州金桃化工设备有限公司 | Combined high-efficiency air preheater and preheating method thereof |
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