CN206094140U - Smoke heat exchanging system - Google Patents
Smoke heat exchanging system Download PDFInfo
- Publication number
- CN206094140U CN206094140U CN201621145069.4U CN201621145069U CN206094140U CN 206094140 U CN206094140 U CN 206094140U CN 201621145069 U CN201621145069 U CN 201621145069U CN 206094140 U CN206094140 U CN 206094140U
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- China
- Prior art keywords
- water
- heat exchanger
- gas
- outlet
- smoke
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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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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses a smoke heat exchanging system, including the surplus enthalpy exchanger of flue gas, be connected with inlet channel, outlet conduit on the surplus enthalpy exchanger of flue gas, smoke heat exchanging system still includes the hot media water heat exchanger, is equipped with thermal medium import, thermal medium export and cold medium import, cold medium export on the hot media water heat exchanger, thermal medium import and inlet channel are connected, thermal medium export and outlet conduit connect, cold medium access connection to battery limit (BL) water, cold medium exit linkage to user. The utility model discloses in fact a closed circulation system, utilize earlier the surplus enthalpy exchanger of flue gas to make system's mesocycle temperature degree rise, recycle the hot media water heat exchanger and can make the circulating water temperature reduce to the minimum application temperature of the surplus enthalpy exchanger entry of flue gas, utilize the low warm water in hot media water heat exchanger heating battery limit (BL) to supply the user to use simultaneously. The utility model discloses need not use the continuous heating of steam heater to intake, not have extra running cost after once coming into operation.
Description
Technical field
This utility model be related to it is a kind of can be used in flue gas low-temperature corrosion area Mist heat recovering and heat normal-temperature water be
System, although needing the water of heating to be in higher temperature for the water temperature that normal temperature state is also ensured that into flue gas heat-exchange unit, avoids
Heat exchanger tube deep-etching wall surface temperature area, belongs to flue gas waste heat recovery technical field.
Background technology
Flue gas loss is a most important heat loss in station boiler operation, and discharge smoke temperature of power station boiler is too high to be affected
The safe operation of the economy and miscellaneous equipment of operation, with pay attention to day by day of the country to energy-saving and emission-reduction, flue gas waste heat recovery profit
With being increasingly valued by the people.Fume afterheat more universal at present has cryogenic heat exchanger, MGGH etc. using technology, both
Fume afterheat is using the cold end corrosion problem of technology than more prominent.As the flue gas that thermal power generation coal-burning boiler is produced contains necessarily
The SO of amount3, and in order to the part or all of wall temperature of heated surface of the heat transmission equipment for reducing exhaust gas temperature, cryogenic heat exchanger and MGGH is in
Below flue gas acid dew point, there is cold end corrosion unavoidably, but certain measure can be taken to control its cold end corrosion speed.It is existing
There is the method for technical controlling cold end corrosion speed in addition to the metal material that can adopt low temperature resistant corrosion, can also pass through to adjust
Water temperature into heating surface makes wall temperature control within zone of reasonableness.Should according to related scientific research personnel research data and engineering practice
With, cryogenic heat exchanger and the minimum water temperature of MGGH equipment should >=60 DEG C, cold end corrosion speed could be controlled.If there is heat medium water water temperature
Situation less than 60 DEG C, must just take certain measure water temperature is improved to more than 60 DEG C and enter back into cryogenic heat exchanger and MGGH
Equipment.The method for generally adopting at present is improved water temperature using steam heater, and this flue gas with steam heater is changed
Hot systems are to arrange steam heater in the water inlet of smoke gas afterheat heat exchanger, heat smoke gas afterheat heat exchanger using steam
Water inlet.Although this method can be such that heat exchanger inflow temperature quickly improves, this method needs constantly to consume steam, for a long time
Operation can cause expense to increase, and cause operating cost high.
The content of the invention
The purpose of this utility model is to provide one kind often to can be used on the heating of flue gas low-temperature corrosion area Mist heat recovering
The system of warm water, although needing the water of heating to be in higher temperature for the water temperature that normal temperature state is also ensured that into flue gas heat-exchange unit
Degree, avoid heat exchanger tube deep-etching wall surface temperature area, with solve in prior art with steam heater smoke heat exchanging system by
Cause the high technical problem of operating cost in steam is constantly consumed.
This utility model is adopted the following technical scheme that：A kind of smoke heat exchanging system, including smoke gas afterheat heat exchanger, more than flue gas
Inlet channel, outlet conduit and gas approach pipeline, exhanst gas outlet pipeline, the smoke heat exchanging system are connected with heat exchanger
Also include heating agent water- to-water heat exchanger, heating agent water- to-water heat exchanger is provided with thermal medium inlet, thermal medium outlet and cold medium import, cold Jie
Matter is exported, and the thermal medium inlet and inlet channel connect, and the thermal medium outlet and outlet conduit connect, and the cold medium is entered
Mouth is connected to battery limit (BL) water, and the cold medium outlet is connected to user.
Boiler is connected with the inlet channel.
The inlet channel is provided with the automatic setting pressure water make-up arrangement being connected with boiler.
The inlet channel is provided with variable frequency pump.
The heating agent water- to-water heat exchanger is plate type heat exchanger or pipe heat exchanger.
Temperature sensor and pressure transducer are equipped with the gas approach pipeline and exhanst gas outlet pipeline.
The smoke gas afterheat heat exchanger includes the first gas-water heat exchanger and the second gas-water heat exchanger, the first flue gas-
The exhanst gas outlet of water- to-water heat exchanger is linked together with the gas approach of the second gas-water heat exchanger, the first gas-water heat exchanger
Gas approach is connected into pipeline with flue gas, and the exhanst gas outlet of the second gas-water heat exchanger is connected with exhanst gas outlet pipeline, and second
The water inlet of gas-water heat exchanger is connected with inlet channel, and the outlet of the first gas-water heat exchanger is connected with outlet conduit,
The first lateral and second branched pipe road, the first lateral and are connected with the outlet of the second gas-water heat exchanger
The water inlet connection of one gas-water heat exchanger, second branched pipe road is connected on outlet conduit, on first, second lateral
It is equipped with electrodynamic valve.
The beneficial effects of the utility model are：When this utility model runs, flue gas is changed through smoke gas afterheat heat exchanger
After heat, temperature is reduced, and temperature rising after the recirculated water in simultaneity factor absorbs fume afterheat after smoke gas afterheat heat exchanger becomes
High-temperature water, the high-temperature water are exchanged heat with battery limit (BL) water at low temperature from thermal medium inlet into heating agent water- to-water heat exchanger, temperature drop after heat exchange
Low high-temperature water flows out Jing inlet channels from thermal medium outlet and enters back in flue gas heat-exchange unit；What high-temperature water heat-exchange temperature was reduced
Meanwhile, battery limit (BL) water at low temperature enters heating agent water- to-water heat exchanger from cold medium import, and battery limit (BL) water at low temperature absorbs the thermal temperature liter of high-temperature water
Flow out for users to use from cold medium outlet after height.This utility model is substantially a kind of closed circulation system, first with flue gas
During afterheat heat exchanger makes system, circulating water temperature is raised, and recycles heating agent water- to-water heat exchanger that circulating water temperature can be made to be reduced to more than flue gas
The minimum use temperature of heat exchanger entrance, while using heating agent water- to-water heat exchanger heating battery limit (BL) water at low temperature for users to use.This practicality
It is new to be actually smoke gas afterheat heat exchanger itself to heat water inlet, compared with prior art, it is not necessary to use steam heater
Constantly heating water inlet, so there is no need to extra consumed energy, the system do not have after once coming into operation extra operation into
This.
Further, boiler is set, moisturizing when giving system water-filling and operation on startup for system.
Further, automatic setting pressure water make-up arrangement is set for automatic water supplement in system and stabilisation systemss pressure.
Further, during system operation, the water yield into smoke gas afterheat heat exchanger is controlled by adjusting variable frequency pump, finally
The control of smoke gas afterheat heat exchanger exit gas temperature is made in the value of setting.
Further, smoke gas afterheat heat exchanger is two gas-water heat exchangers, can be opened according to flue gas waste heat for heat exchange situation
Open one of lateral, in that case it can be decided that the isolated operation of a gas-water heat exchanger or two gas-water heat exchangers are simultaneously
Operation.
Description of the drawings
Fig. 1 is a kind of structural representation of embodiment of this utility model.
Specific embodiment
This utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
A kind of structure of embodiment of this utility model as shown in figure 1, the smoke heat exchanging system of the present embodiment, including more than flue gas
Heat exchanger 1, is connected with inlet channel 11, outlet conduit 12 and flue gas and goes out into pipeline 13, flue gas on smoke gas afterheat heat exchanger 1
Mouthful pipeline 14, is connected with boiler 3 on the inlet channel 11, inlet channel 11 be provided be connected with boiler 3 automatically calmly
Pressure water replanishing device 4, is additionally provided with variable frequency pump 5 on the inlet channel 11.On gas approach pipeline 13 and exhanst gas outlet pipeline 14
It is provided with temperature sensor and pressure transducer.The smoke heat exchanging system also includes heating agent water- to-water heat exchanger 2, heating agent in the present embodiment
Water- to-water heat exchanger 2 adopts plate type heat exchanger, heating agent water- to-water heat exchanger 2 to be provided with thermal medium inlet 21, thermal medium outlet 22 and cold Jie
Matter import 23, cold medium outlet 24, the thermal medium inlet 21 and outlet conduit 12 connect, the thermal medium outlet 22 and water inlet
11 road of water pipe connects, and the cold medium import 23 is connected to battery limit (BL) water, and the cold medium outlet 24 is connected to user.
The system is closed circulation system, and during system operation, 100 ~ 150 DEG C of flue gas is carried out through smoke gas afterheat heat exchanger
Heat exchange, temperature are down to 90 DEG C or so, and in system, recirculated water absorbs fume afterheat temperature through smoke gas afterheat heat exchanger and rises from 60 DEG C
Up to 100 DEG C, the recirculated water after heating is high-temperature water, and 100 DEG C of the high-temperature water Jing outlet conduits and thermal medium inlet are entered into
Exchanged heat with 20 DEG C of water at low temperature from battery limit (BL) in heating agent water- to-water heat exchanger, high temperature coolant-temperature gage be down to from 100 DEG C 60 DEG C or so by
Inlet channel is circulated heat exchange, the heat of the 20 DEG C of water at low temperature absorption system recirculated waters in battery limit (BL) again in being recycled to smoke gas afterheat heat exchanger
Amount removes user, available 60 DEG C or so the hot water of user after heating up.System circulation water enters fume afterheat after being pressurized by variable frequency pump
By flue gas in heat exchanger, variable frequency pump can be adjusted according to smoke gas afterheat heat exchanger exit gas temperature, be controlled into flue gas
The afterheat heat exchanger water yield, finally makes smoke gas afterheat heat exchanger exit gas temperature control at 90 DEG C or so.Heat is entered by adjusting
The inlet of battery limit (BL) water at low temperature in matchmaker's water- to-water heat exchanger, makes the temperature control at smoke gas afterheat heat exchanger water inlet at 60 DEG C.System sets
Boiler and automatic setting pressure water make-up arrangement are put, is mended in system automatically during for during system start-up to system water-filling and system operation
Water and stabilisation systemss pressure.
In the present embodiment, smoke gas afterheat heat exchanger 1 includes the first gas-water heat exchanger a1 and the second gas-water heat exchanger
A2, the exhanst gas outlet of the first gas-water heat exchanger a1 are linked together with the gas approach of the second gas-water heat exchanger a2, the
The gas approach of one gas-water heat exchanger a1 is connected into pipeline 13 with flue gas, the exhanst gas outlet of the second gas-water heat exchanger a2
It is connected with exhanst gas outlet pipeline 14, the water inlet of the second gas-water heat exchanger a2 is connected with inlet channel 11, the first gas-water
The outlet of heat exchanger a1 is connected with outlet conduit 12, is connected with the first branch on the outlet of the second gas-water heat exchanger a2
Pipeline 6 and second branched pipe road 7, the first lateral 6 are connected with the water inlet of the first gas-water heat exchanger a1, the second branch
Pipeline 7 is connected on outlet conduit 12, is equipped with electrodynamic valve on first, second lateral 6,7.Due to smoke gas afterheat heat exchanger
For two gas-water heat exchangers, one of branched pipe can be opened, a gas-water is determined according to flue gas waste heat for heat exchange situation
Heat exchanger isolated operation or two gas-water heat exchangers are run simultaneously.
In other embodiments of the present utility model, smoke gas afterheat heat exchanger can adopt the gas-water of three and the above
Heat exchanger, certainly can be with only with a gas-water heat exchanger.The quantity of gas-water heat exchanger is spirit according to actual needs
Selection living.
In other embodiments of the present utility model, heating agent water- to-water heat exchanger can also adopt pipe heat exchanger or other water-
Water- to-water heat exchanger.
Above-described embodiment is this utility model preferred embodiment, in other embodiments of the present utility model, can be with root
According to the requirement and the requirement of smog discharge temperature of smoke gas afterheat heat exchanger inflow temperature, it is adjusted flexibly in smoke gas afterheat heat exchanger
The inlet of battery limit (BL) water at low temperature in inflow and heating agent water- to-water heat exchanger.In this utility model, each temperature parameter is according to actual fortune
Row requires what is be adjusted flexibly.
On the premise of without departing from this utility model spirit and scope, this utility model also has various changes and modifications,
These changes and improvements are both fallen within the range of claimed this utility model.The claimed scope of this utility model is by appended
Claims and its equivalent thereof.
Claims (7)
1. a kind of smoke heat exchanging system, including smoke gas afterheat heat exchanger（1）, smoke gas afterheat heat exchanger（1）On be connected with water inlet pipe
Road（11）, outlet conduit（12）With gas approach pipeline（13）, exhanst gas outlet pipeline（14）, it is characterised in that：The flue gas is changed
Hot systems also include heating agent water- to-water heat exchanger（2）, heating agent water- to-water heat exchanger（2）It is provided with thermal medium inlet（21）, thermal medium outlet
（22）And cold medium import（23）, cold medium outlet（24）, the thermal medium outlet（22）And inlet channel（11）Connection, institute
State thermal medium inlet（21）And outlet conduit（12）Connection, the cold medium import（23）It is connected to battery limit (BL) water, the cold medium
Outlet（24）It is connected to user.
2. smoke heat exchanging system according to claim 1, it is characterised in that：The inlet channel（11）On be connected with hot water
Case（3）.
3. smoke heat exchanging system according to claim 2, it is characterised in that：The inlet channel（11）It is provided with and hot water
Case（3）The automatic setting pressure water make-up arrangement of connection（4）.
4. smoke heat exchanging system according to claim 1, it is characterised in that：The inlet channel（11）It is provided with variable frequency pump
（5）.
5. smoke heat exchanging system according to claim 1, it is characterised in that：The heating agent water- to-water heat exchanger（2）Change for board-like
Hot device or pipe heat exchanger.
6. smoke heat exchanging system according to claim 1, it is characterised in that：The gas approach pipeline（13）Go out with flue gas
Mouth pipeline（14）On be equipped with temperature sensor and pressure transducer.
7. the smoke heat exchanging system according to claim 1 to 6 any one, it is characterised in that：The flue gas waste heat for heat exchange
Device（1）Including the first gas-water heat exchanger（a1）With the second gas-water heat exchanger（a2）, the first gas-water heat exchanger（a1）'s
Exhanst gas outlet and the second gas-water heat exchanger（a2）Gas approach link together, the first gas-water heat exchanger（a1）Cigarette
Gas import and gas approach pipeline（13）Connection, the second gas-water heat exchanger（a2）Exhanst gas outlet and exhanst gas outlet pipeline
（14）Connection, the second gas-water heat exchanger（a2）Water inlet and inlet channel（11）Connection, the first gas-water heat exchanger
（a1）Outlet and outlet conduit（12）Connection, the second gas-water heat exchanger（a2）Outlet on be connected with the first branch
Pipeline（6）With second branched pipe road（7）, the first lateral（6）With the first gas-water heat exchanger（a1）Water inlet connection,
Second branched pipe road（7）It is connected to outlet conduit（12）On, first, second lateral（6、7）On be equipped with electrodynamic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621145069.4U CN206094140U (en) | 2016-10-21 | 2016-10-21 | Smoke heat exchanging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621145069.4U CN206094140U (en) | 2016-10-21 | 2016-10-21 | Smoke heat exchanging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206094140U true CN206094140U (en) | 2017-04-12 |
Family
ID=58484728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621145069.4U Expired - Fee Related CN206094140U (en) | 2016-10-21 | 2016-10-21 | Smoke heat exchanging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206094140U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107726870A (en) * | 2017-10-23 | 2018-02-23 | 北京和然益华节能科技有限责任公司 | Copper smelting plant flue gas waste heat recovery system and application method |
| CN108758678A (en) * | 2018-08-04 | 2018-11-06 | 陕西大秦环境科技有限公司 | Nitrogen oxides minimum discharge system, discharge energy saver and flue gas waste heat recoverer |
| CN112797432A (en) * | 2020-12-31 | 2021-05-14 | 大唐郓城发电有限公司 | Boiler flue gas waste heat degree of depth utilizes system |
-
2016
- 2016-10-21 CN CN201621145069.4U patent/CN206094140U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107726870A (en) * | 2017-10-23 | 2018-02-23 | 北京和然益华节能科技有限责任公司 | Copper smelting plant flue gas waste heat recovery system and application method |
| CN108758678A (en) * | 2018-08-04 | 2018-11-06 | 陕西大秦环境科技有限公司 | Nitrogen oxides minimum discharge system, discharge energy saver and flue gas waste heat recoverer |
| CN112797432A (en) * | 2020-12-31 | 2021-05-14 | 大唐郓城发电有限公司 | Boiler flue gas waste heat degree of depth utilizes system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20211021 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |