CN109506246A - A kind of water-borne formula steam air heater of two-stage combined heat - Google Patents
A kind of water-borne formula steam air heater of two-stage combined heat Download PDFInfo
- Publication number
- CN109506246A CN109506246A CN201811491996.5A CN201811491996A CN109506246A CN 109506246 A CN109506246 A CN 109506246A CN 201811491996 A CN201811491996 A CN 201811491996A CN 109506246 A CN109506246 A CN 109506246A
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- China
- Prior art keywords
- water
- low
- air heater
- steam air
- heat exchanger
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- 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.)
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Classifications
-
- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
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- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
Abstract
The present invention relates to boiler exhaust gas field of waste heat utilization, particularly disclose a kind of water-borne formula steam air heater of two-stage combined heat.The water-borne formula steam air heater of the two-stage combined heat, including air preheater, deduster, low-temperature flue gas heat exchanger, it is characterized by: being disposed with water-borne formula steam air heater on the supply air duct of the connection air preheater, the heat exchanger outlet conduit of low-temperature flue gas heat exchanger connects the water inlet of water-borne formula steam air heater, the condensed water in high temperature water intake conduit and low-temperature condensate water intake conduit of the heat exchanger water supply line parallel communication condensate system of low-temperature flue gas heat exchanger；The steam air heater water return pipeline of water-borne formula steam air heater is connected to main condensate pipeline.The configuration of the present invention is simple, operational safety are stablized, and are superimposed fume afterheat using the condensed water of low-lying level, significantly heating boiler is blown, the taste of smoke discharging residual heat is improved, while with the lower steam extraction of energy level instead of the higher steam extraction of energy level, it is comprehensive to promote low-lying level using energy source energy level.
Description
(1) technical field
The present invention relates to boiler exhaust gas field of waste heat utilization, in particular to the water-borne formula steam air heater of a kind of two-stage combined heat.
(2) background technique
Fired power generating unit is led to solve the problems, such as that rotary regenerative air preheater cold end dust stratification, blocking, corrosion etc. influence operational safety
It need to often arrange steam warming machine or fume afterheat steam air heater, utilize the air-supply of steam or fume afterheat heating boiler.But due to taking out
The energy level of vapour is higher or the grade of fume afterheat is lower, and overall economic efficiency is lower.
(3) summary of the invention
That in order to compensate for the shortcomings of the prior art, the present invention provides a kind of structures is simple, Benefit of Unit is high, the two-stage of operational safety
The water-borne formula steam air heater of combined heat.
The present invention is achieved through the following technical solutions:
A kind of water-borne formula steam air heater of two-stage combined heat, including be sequentially arranged in boiler back end ductwork along flow of flue gas direction
Air preheater, deduster, low-temperature flue gas heat exchanger, it is characterised in that: it is described connection air preheater supply air duct on
It is disposed with water-borne formula steam air heater, the heat exchanger outlet conduit of low-temperature flue gas heat exchanger connects the water inlet of water-borne formula steam air heater, low
The condensed water in high temperature water intake conduit and cryogenic temperature condensation of the heat exchanger water supply line parallel communication condensate system of warm flue gas heat-exchange unit
Water water intake conduit；The steam air heater water return pipeline of water-borne formula steam air heater is connected to main condensate pipeline.
The present invention arranges low-temperature flue gas heat exchanger in boiler back end ductwork, and water-borne formula warm wind is arranged in supply air duct
Device is blown using low-temperature condensate and fume afterheat combined heat boiler, the low grade thermal energy of deep exploitation, while by low-grade heat
High-grade thermal energy can be converted to, the operational safety of Benefit of Unit and air preheater is improved.
More excellent technical solution of the invention are as follows:
Booster is installed on the heat exchanger water supply line, condensed water, boosted pumping are drawn from condensed water water intake conduit
Enter low-temperature flue gas heat exchanger, water-borne formula steam air heater heat release is entered after heat absorption, return water is back to main condensate pipeline.
Cryogenic temperature condensation water regulating valve is installed on the low-temperature condensate water intake conduit, to the water flow in water intake conduit into
Row adjusts control.
Dry point of the tie point of the steam air heater water return pipeline and main condensate water system in low-temperature condensate water intake conduit
Before.
The low-temperature condensate water intake conduit is connected to main condensate pipeline, condensed water in high temperature water intake conduit and low-pressure heating
The outlet pipe of device is connected to.
In the present invention, heat exchanger is that the low-temperature condensate for being derived from condensate system and condensed water in high temperature mix using medium
The suitable mixing water of temperature afterwards；70 DEG C or so of the final stage low-pressure heater condensed water drawn by condensate system, it is boosted
After pump enters the heat absorption of low-temperature flue gas heat exchanger, into water-borne formula steam air heater heat release, 60 DEG C or so of return water returns to final stage after heat release
Low addition mouth condensing water conduit.
The present invention is blown using low-temperature condensate and fume afterheat combined heat boiler, sufficiently improves pre-heater inlet wind
Temperature, air preheater outlet hot blast temperature can also correspondingly increase, so that boiler efficiency be made to improve, combustion efficiency improves.Air preheater outlet
The raising of flue-gas temperature improves the synthesis tube wall temperature of air preheater cold end, mitigates the stifled ash of air preheater cold-end air, corrosion is asked
Topic, while improving the flue gas utilization grade of low-temperature flue gas heat exchanger.
The configuration of the present invention is simple, operational safety stablize, using low-lying level condensed water be superimposed fume afterheat, significantly plus
Heat boiler air-supply improves the taste of smoke discharging residual heat, while with the lower steam extraction of energy level instead of the higher steam extraction of energy level, synthesis is mentioned
Rise low-lying level using energy source energy level.
(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 supply air ducts, 3 water-borne formula steam air heaters, 4 dedusters, 5 low-temperature flue gas heat exchangers, 6 liters
Press pump, 7 heat exchanger water supply lines, 8 heat exchanger outlet conduits, 9 steam air heater water return pipelines, 10 condensed water in high temperature water intake conduits, 11
Low-temperature condensate water intake conduit, 12 cryogenic temperature condensation water regulating valves.
(5) specific embodiment
Attached drawing is a kind of specific embodiment of the invention.The embodiment include in boiler back end ductwork along flow of flue gas direction according to
Air preheater 1, deduster 4, the low-temperature flue gas heat exchanger 5 of secondary arrangement, it is described connection air preheater 1 supply air duct 2 on
It is disposed with water-borne formula steam air heater 3, the heat exchanger outlet conduit 8 of low-temperature flue gas heat exchanger 5 connects the water inlet of water-borne formula steam air heater 3
Mouthful, 10 He of condensed water in high temperature water intake conduit of the 7 parallel communication condensate system of heat exchanger water supply line of low-temperature flue gas heat exchanger 5
Low-temperature condensate water intake conduit 11；The steam air heater water return pipeline 9 of water-borne formula steam air heater 3 is connected to main condensate pipeline.
Booster 6 is installed on the heat exchanger water supply line 7；It is equipped on the low-temperature condensate water intake conduit 11 low
Temperature condensation water regulating valve 12；The tie point of the steam air heater water return pipeline 9 and main condensate water system is in low-temperature condensate intake pipe
Before the dry point in road 11；The low-temperature condensate water intake conduit 11 is connected to main condensate pipeline, condensed water in high temperature water intake conduit
10 are connected to the outlet pipe of low-pressure heater.
In the present invention, the condensed water in high temperature drawn of condensed water in high temperature water intake conduit 10 that is exported by No. 7 low-pressure heaters with
The low-temperature condensate mixing drawn by the low-temperature condensate water intake conduit 11 of No. 8 low-pressure heater imports, mixing temperature is by low temperature
It condenses water regulating valve 12 to control, water temperature is not less than 70 DEG C.The boosted pump 6 of mixing water, is entered by heat exchanger water supply line 7 and is arranged
Low-temperature flue gas heat exchanger 5 in 4 exhaust pass of deduster enters water-borne formula through heat exchanger outlet conduit 8 after condensed water heat absorption
Steam air heater 3, heating boiler cold wind is to 85 DEG C, about 60 DEG C of return water temperature after heat release, through steam air heater water return pipeline 9 enter No. 8 it is low plus
Entrance completes circulation loop.
Low-temperature flue gas heat exchanger 5 and water-borne formula steam air heater 3 are modular arrangement, and inlet and outlet setting valve and pressure are surveyed
Point, in heat exchanger tube leakage can leakage detection and cutting in time, it is convenient to overhaul.
Claims (5)
1. a kind of water-borne formula steam air heater of two-stage combined heat, including along flow of flue gas direction successively cloth in boiler back end ductwork
Air preheater (1), deduster (4), the low-temperature flue gas heat exchanger (5) set, it is characterised in that: the connection air preheater
(1) water-borne formula steam air heater (3), the heat exchanger outlet conduit (8) of low-temperature flue gas heat exchanger (5) are disposed on supply air duct (2)
Connect the water inlet of water-borne formula steam air heater (3), heat exchanger water supply line (7) the parallel communication condensation of low-temperature flue gas heat exchanger (5)
The condensed water in high temperature water intake conduit (10) and low-temperature condensate water intake conduit (11) of water system；The warm wind of water-borne formula steam air heater (3)
Device water return pipeline (9) is connected to main condensate pipeline.
2. the water-borne formula steam air heater of two-stage combined heat according to claim 1, it is characterised in that: the heat exchanger supplies water
Booster (6) are installed on pipeline (7).
3. the water-borne formula steam air heater of two-stage combined heat according to claim 1, it is characterised in that: the low-temperature condensate
Cryogenic temperature condensation water regulating valve (12) are installed on water intake conduit (11).
4. the water-borne formula steam air heater of two-stage combined heat according to claim 1, it is characterised in that: the steam air heater return water
The tie point of pipeline (9) and main condensate water system is before the dry point of low-temperature condensate water intake conduit (11).
5. the water-borne formula steam air heater of two-stage combined heat according to claim 1, it is characterised in that: the low-temperature condensate
Water intake conduit (11) is connected to main condensate pipeline, and the outlet pipe of condensed water in high temperature water intake conduit (10) and low-pressure heater connects
It is logical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491996.5A CN109506246A (en) | 2018-12-07 | 2018-12-07 | A kind of water-borne formula steam air heater of two-stage combined heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491996.5A CN109506246A (en) | 2018-12-07 | 2018-12-07 | A kind of water-borne formula steam air heater of two-stage combined heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109506246A true CN109506246A (en) | 2019-03-22 |
Family
ID=65751833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811491996.5A Pending CN109506246A (en) | 2018-12-07 | 2018-12-07 | A kind of water-borne formula steam air heater of two-stage combined heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109506246A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594774A (en) * | 2019-09-12 | 2019-12-20 | 中国电力工程顾问集团西南电力设计院有限公司 | Heating system of air heater at cold end of air preheater of thermal power plant |
| CN111306566A (en) * | 2020-02-20 | 2020-06-19 | 华电电力科学研究院有限公司 | Separation type air preheating system and method for preventing ABS (anti-lock brake System) of air preheater from being blocked |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3202134A (en) * | 1963-01-03 | 1965-08-24 | G & J Weir Ltd | Regeneration of the heat of boiler flue gases |
| 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 |
| CN207751005U (en) * | 2017-12-19 | 2018-08-21 | 山东泓奥电力科技有限公司 | A kind of stove cigarette recycling coupling fume afterheat becomes energy level and utilizes system |
| CN209431447U (en) * | 2018-12-07 | 2019-09-24 | 华电新乡发电有限公司 | A kind of water-borne formula steam air heater of two-stage combined heat |
-
2018
- 2018-12-07 CN CN201811491996.5A patent/CN109506246A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3202134A (en) * | 1963-01-03 | 1965-08-24 | G & J Weir Ltd | Regeneration of the heat of boiler flue gases |
| 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 |
| CN207751005U (en) * | 2017-12-19 | 2018-08-21 | 山东泓奥电力科技有限公司 | A kind of stove cigarette recycling coupling fume afterheat becomes energy level and utilizes system |
| CN209431447U (en) * | 2018-12-07 | 2019-09-24 | 华电新乡发电有限公司 | A kind of water-borne formula steam air heater of two-stage combined heat |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594774A (en) * | 2019-09-12 | 2019-12-20 | 中国电力工程顾问集团西南电力设计院有限公司 | Heating system of air heater at cold end of air preheater of thermal power plant |
| CN111306566A (en) * | 2020-02-20 | 2020-06-19 | 华电电力科学研究院有限公司 | Separation type air preheating system and method for preventing ABS (anti-lock brake System) of air preheater from being blocked |
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