CN209196907U - Air preheater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization - Google Patents
Air preheater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization Download PDFInfo
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- CN209196907U CN209196907U CN201821734072.9U CN201821734072U CN209196907U CN 209196907 U CN209196907 U CN 209196907U CN 201821734072 U CN201821734072 U CN 201821734072U CN 209196907 U CN209196907 U CN 209196907U
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- air preheater
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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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Abstract
The utility model 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.The structure design of the utility model is reasonable, 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 utility model relates to preheaters to propose effect, flue gas heat recycling field, in particular to a kind of air preheater 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 the big hollow air preheater of multicomputer exists
The problems such as flue gas resistance is higher, exhaust gas temperature is more than design value, air preheater outlet smoke temperature increases, and boiler efficiency is caused to drop
It is low.Therefore, air preheater need to be carried out proposing effect.But after proposing effect, air preheater outlet smoke temperature is reduced, and leads to air preheater
The reduction of cold end integrated temperature, ammonium hydrogen sulfate corrosion aggravation, the energy level reduction of fume afterheat, effect variation of UTILIZATION OF VESIDUAL HEAT IN etc. are asked
Topic.
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
The utility model in order to make up for the deficiencies of the prior art, provides a kind of reduction air preheater outlet smoke temperature, mentions
High boiler efficiency, energy-saving and emission-reduction, power station boiler air pre-heater safe and reliable to operation mention effect coupling low-grade flue gas heat and return
Receive the association system utilized.
The utility model is achieved by the following technical solution:
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 sky
Air preheater has been sequentially arranged deduster, absorption tower along flow of flue gas direction on the flue at air preheater rear, and feature exists
In: the high-temperature section heat exchanger being disposed in the flue between air preheater outlet and deduster entrance, and be located at
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.
The fume afterheat of recycling is divided into three parts by the utility model, and first part proposes effect by air preheater to mention
High boiler efficiency；Second part enters furnace wind-warm syndrome and boiler efficiency by low-temperature zone heat exchanger and low pressure condensation water circularly enhancing, mentions
It rises air preheater outlet smoke temperature and obtains high level fume afterheat, while improve air preheater cold-end air integrated temperature；Third
Part steam turbine condensed water, gain coal consumption saving are heated by the high level fume afterheat that high-temperature section heat exchanger absorbs.
The more excellent technical solution of the utility model are as follows:
The main condensate water system includes passing through concatenated No. 8 low-pressure heaters of condensing water conduit, No. 7 low-pressure heaters, 6
Number low-pressure heater and No. 5 low-pressure heaters, wherein No. 8 low-pressure heaters and No. 7 low-pressure heaters are unitized, condensation
Condensate pump is installed on waterpipe.
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.
The structure design of the utility model is reasonable, can reduce air preheater outlet smoke temperature, improve boiler efficiency and have
Effect solves the problems, such as to cause because air preheater outlet smoke temperature reduces, while being recycled to low-grade flue gas heat,
The security reliability for improving air preheater obtains preferable economic benefit.
(4) Detailed description of the invention
The utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is the structural schematic diagram of the utility model.
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 utility model.The embodiment includes air preheater 1, air preheater 1
It has been sequentially arranged deduster 18, absorption tower 19 along flow of flue gas direction on the flue at rear, has been disposed in the flue and is located at sky
High-temperature section heat exchanger 5 between the outlet of air preheater 1 and 18 entrance of deduster, and the low-temperature zone heat exchange before absorption tower 19
Device 10；The air heater 11 being disposed in cold air duct in front of 1 entrance of air preheater；High-temperature section heat exchanger 5 and master are solidifying
System parallel connection is born water, 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 air preheater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization, including air preheater
(1), it has been sequentially arranged deduster (18), absorption tower (19) along flow of flue gas direction on the flue at air preheater (1) rear,
Be characterized in that: the high temperature section being disposed between air preheater (1) outlet and deduster (18) entrance in the flue is changed
Hot device (5), and it is located at the low-temperature zone heat exchanger (10) before absorption tower (19)；It is disposed in cold air duct positioned at air preheater
(1) air heater in front of entrance (11)；High-temperature section heat exchanger (5) is in parallel with main condensate water system, low-temperature zone heat exchanger
(10) open system is formed with air heater (11).
2. air preheater according to claim 1 mentions the association system of effect coupling low-grade flue gas heat recovery and utilization,
It is characterized by: the main condensate water system includes passing through concatenated No. 8 low-pressure heaters (13) of condensing water conduit, No. 7 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 it is low
Press heater (14) be it is unitized, condensate pump (17) are installed on condensing water conduit.
3. air preheater according to claim 2 mentions the association system of effect coupling low-grade flue gas heat recovery and utilization,
It is characterized by: the water inlet line of the high-temperature section heat exchanger (5) is respectively communicated with the condensation water inlet of No. 8 low-pressure heaters (13)
With the condensation water out of No. 7 low-pressure heaters (14), and high temperature section inlet adjusting valve (2), high temperature section are installed on water inlet line
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 heaters (16)
Entrance, and high temperature section return water motor-driven valve (6) is installed on outlet conduit.
4. air preheater according to claim 2 mentions the association system of effect coupling low-grade flue gas heat recovery and utilization,
It is characterized by: the condensed water that the water inlet line of the low-temperature zone heat exchanger (10) is respectively communicated with No. 8 low-pressure heaters (13) enters
Mouthful and No. 7 low-pressure heaters (14) condensation water out, low-temperature zone inlet adjusting valve (7), low-temperature zone are installed on water inlet line
Import motor-driven valve (8) and low-temperature zone booster (9)；Outlet conduit connection air heater (11) of low-temperature zone heat exchanger (10)
Water inlet line.
5. air preheater according to claim 2 mentions the association system of effect coupling low-grade flue gas heat recovery and utilization,
It is characterized by: the outlet conduit of the air heater (11) is connected to the main condensate system before No. 8 low-pressure heaters (13)
The pipeline of system, and air heater return water motor-driven valve (12) is installed on outlet conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821734072.9U CN209196907U (en) | 2018-10-25 | 2018-10-25 | Air preheater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821734072.9U CN209196907U (en) | 2018-10-25 | 2018-10-25 | Air preheater 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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| CN209196907U true CN209196907U (en) | 2019-08-02 |
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| CN201821734072.9U Active CN209196907U (en) | 2018-10-25 | 2018-10-25 | Air preheater 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 |
|---|---|---|---|---|
| CN109210561A (en) * | 2018-10-25 | 2019-01-15 | 华电新乡发电有限公司 | 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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2018
- 2018-10-25 CN CN201821734072.9U patent/CN209196907U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210561A (en) * | 2018-10-25 | 2019-01-15 | 华电新乡发电有限公司 | 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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