CN105546562A - Flue and control method for controlling smoke temperature and improvement method for flue - Google Patents
Flue and control method for controlling smoke temperature and improvement method for flue Download PDFInfo
- Publication number
- CN105546562A CN105546562A CN201610066567.8A CN201610066567A CN105546562A CN 105546562 A CN105546562 A CN 105546562A CN 201610066567 A CN201610066567 A CN 201610066567A CN 105546562 A CN105546562 A CN 105546562A
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- China
- Prior art keywords
- flue
- heat exchanger
- channel
- exchanger channels
- flue gas
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Temperature (AREA)
Abstract
The invention provides a flue capable of controlling smoke temperature. The flue comprises one or more heat exchange channels and one or more straight channels. The invention provides a control method for controlling the smoke temperature. According to the control method, when the smoke temperature rises, smoke is controlled to flow through the straight channels preferentially; when the smoke temperature is lowered, the smoke is controlled to flow through the heat exchange channel preferentially. The invention further provides an improvement method for the flue. The flue, the control method and the improvement method have the advantages that the flue is divided into a plurality of parts and comprises one or more heat exchange channels and one or more straight channels with heat exchange surfaces removed, and the smoke temperature is adjusted by controlling the flow path of the smoke; the structure of the flue is simple, the temperature adjustment range is wide, stepless temperature adjustment can be realized, the flue is applicable to newly-constructed boilers and old boiler improvements, the flue gas loss of the boilers can be lowered, and the boiler efficiency can be improved.
Description
Technical field
The present invention relates to a kind of flue, fibre selection method and flue controlling cigarette temperature to improve one's methods.
Background technology
Current, coal-burning boiler, before smoke evacuation, needs to process flue gas, the harmful substance existed is removed in flue gas, reduce the pollution to air.To remove the evil reaction so arrange various reaction unit in flue to flue gas, the reaction temperature of various reaction unit has certain requirement, otherwise the respond of catalyst will decline, and may cause the fault of upstream device.
Flue-gas temperature changes along with the change of boiler load.Boiler operatiopn is when high load capacity, and time flue gas arrives reaction unit, temperature is higher.When boiler reduces load operation, flue-gas temperature also declines thereupon, and when arriving reaction unit, temperature is lower.Temperature is too high and too lowly all can cause reaction not exclusively, and harmful substances from flue gases can not drop to standard-required, brings infringement to atmospheric environment.
Summary of the invention
The invention provides and a kind ofly control flue and the control method of cigarette temperature and improve one's methods, comprise heat exchanger channels and put-through channel, the cigarette temperature before arriving reaction unit can be regulated, to overcome the defect of above-mentioned prior art.
The invention provides a kind of flue controlling cigarette temperature, comprise at least one heat exchanger channels and at least one put-through channel.
Further, the invention provides a kind of flue controlling cigarette temperature, can also have such feature: put-through channel has through swtich, through swtich can regulate folding angle.
Further, the invention provides a kind of flue controlling cigarette temperature, can also have such feature: heat exchanger channels has heat exchange switch, heat exchange switch can regulate folding angle.
Further, the invention provides a kind of flue controlling cigarette temperature, such feature can also be had: heat exchanger channels and put-through channel are symmetrical arranged.
Further, the invention provides a kind of flue controlling cigarette temperature, such feature can also be had: also comprise reaction unit; Before heat exchanger channels and put-through channel are arranged on reaction unit.
Further, the invention provides a kind of flue controlling cigarette temperature, such feature can also be had: also comprise compensation heat-transfer surface, after being arranged on reaction unit.
In addition, the invention provides the method for also a kind of fibre selection: when heightening cigarette temperature, controlling flue gas and preferentially passing through from put-through channel; When turning down cigarette temperature, controlling flue gas and preferentially passing through from heat exchanger channels.
Further, the invention provides a kind of method of fibre selection, such feature can also be had: control mode regulates through swtich, when through swtich cuts out put-through channel, flue gas passes through from heat exchanger channels completely, and along with the opening degree of through swtich increases, flue gas preferentially passes through from put-through channel.
Further, the invention provides a kind of method of fibre selection, such feature can also be had: control mode regulates heat exchange switch, when heat exchange switch cuts out heat exchanger channels, flue gas passes through from put-through channel completely, and along with the opening degree of heat exchange switch increases, flue gas passes through from heat exchanger channels.
In addition, the present invention also provides improving one's methods of a kind of flue: removed by the part heat exchanger fin of the vertical setting in flue, then the region having heat exchanger fin and do not have a heat exchanger fin is isolated, form heat exchanger channels and put-through channel, then by-pass cock is set in heat exchanger channels and/or put-through channel.
The effect of invention and effect
The invention provides and a kind ofly control flue and the control method of cigarette temperature and improve one's methods, flue is separated into several, at least comprising the put-through channel that a heat exchanger channels and eliminate heat-transfer surface in flue, by controlling the path that flue gas passes through, regulating the temperature of flue gas.
The invention provides a kind of control cigarette temperature flue and the improving one's methods of control method and flue, by installing the flue gas flow that controllable register balances put-through channel and heat exchanger channels below put-through channel and/or heat exchanger channels additional, thus reach the target regulating the flue-gas temperature before arriving reaction unit.
The invention provides and a kind ofly control flue and the control method of cigarette temperature and improve one's methods, arrange the heat-transfer surface of some at the downstream space of reaction unit, for compensating the heat-transfer surface removed in put-through channel, and recovered flue gas energy.Compared with prior art, embodiment of the present invention is simple, and the temperature amplitude of accommodation is large, can stepless temperature-regulating, to newly constructed boiler and old boiler improvement all applicable, boiler exhaust gas loss can also be reduced simultaneously, improve boiler efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the flue controlling cigarette temperature in embodiment one.
Fig. 2 is the structural representation that flue improves.
Fig. 3 is the structural representation of the flue controlling cigarette temperature in embodiment two.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Embodiment one
Fig. 1 is the structural representation of the flue controlling cigarette temperature in embodiment one.
As shown in Figure 1, the flue controlling cigarette temperature comprises: heat exchanger channels 10, two put-through channels 20, reaction unit 30 and compensation heat-transfer surface 40.
Heat exchanger channels 10 has some vertically disposed heat exchanger fins 11.
Two put-through channels 20 are arranged on the both sides of heat exchanger channels 10 symmetrically.So-called put-through channel 20 is exactly do not arrange heat exchanger fin in passage, and flue gas does not carry out heat exchange, directly passes through.Put-through channel 20 and heat exchanger channels 10 mutually isolated.
Two put-through channels 20 have adjustment through swtich 21 respectively, are arranged on the bottom of put-through channel 20.Regulate through swtich 21 can be controllable register, the amplitude that temperature raises can control to adjust the opening degree of through swtich 21.Under normal circumstances, through swtich 21 is in closed condition.
After reaction unit 30 is arranged on heat exchanger channels 10 and put-through channel 20.In the present embodiment, reaction unit is selective catalytic reduction device (SCR).Because reaction unit needs certain reaction temperature, flue gas can have the change of certain amplitude along with the change of boiler load, temperature before reaction unit is arrived, so arrange heat exchanger channels and put-through channel controls the cigarette temperature before arriving reaction unit in order to control flue gas.
Compensate after heat-transfer surface 40 is arranged on reaction unit 30 because before in order to reaction temperature need improve flue-gas temperature; After smoke reaction, carry out heat exchange further and reduce flue-gas temperature, flue-gas temperature raising is before compensated.
The method of fibre selection:
Cigarette temperature before arriving reaction unit is higher, when flue gas needs to lower the temperature: regulate through swtich 21 to close, flue gas entered from heat exchanger channels 10 completely, carried out heat transfer process completely.
Cigarette temperature before arriving reaction unit is lower, when flue gas needs to heat up: open and regulate through swtich 21, by pass in the process of standard-sized sheet, increasing flue gas passes through from put-through channel 20, relative is fewer and feweri by the passage of heat exchanger channels 10, heat exchange amount reduces, and is raised by the temperature of flue gas afterwards.
In addition, the flue of the control cigarette temperature provided in the present embodiment and control method, be not only applicable to the flue of coming of new, and can improve in existing flue, and concrete improvement is as follows:
Fig. 2 is the structural representation that flue improves.
As shown in Figure 2, by flue, the heat exchanger fin 11-1 of the vertical setting of both sides removes, then will there is heat exchanger fin 11-2 and not there is the region of heat exchanger fin 11-1, adopt dividing plate 50 to isolate, form heat exchanger channels 10 and put-through channel 20, then adjustment through swtich 21 is set in put-through channel 10.
The area compensating heat-transfer surface 40 can be equal to or less than removed heat exchange area in put-through channel.
Embodiment two
Fig. 3 is the structural representation of the flue controlling cigarette temperature in embodiment two.
As shown in Figure 3, the flue controlling cigarette temperature comprises: two heat exchanger channels 10, put-through channel 20, reaction units 30 and compensation heat-transfer surfaces 40.
In the present embodiment, heat exchanger channels 10 has adjustment heat exchange switch 12; Corresponding put-through channel 20 does not have through swtich.The 26S Proteasome Structure and Function of miscellaneous part is identical with embodiment one, no longer repeated description.
The method of fibre selection:
Cigarette temperature before arriving reaction unit is lower, when flue gas needs to heat up: close and regulate heat exchange switch 12, by opening in the process of closing, increasing flue gas passes through from put-through channel 20, relative is fewer and feweri by the flue gas of heat exchanger channels 10, heat exchange amount reduces, and is raised by the temperature of flue gas afterwards.
Cigarette temperature before arriving reaction unit is higher, when flue gas needs to lower the temperature: open and regulate heat exchange switch 12, by pass in the process of standard-sized sheet, increasing flue gas passes through from heat exchanger channels 10, relative is fewer and feweri by the flue gas of put-through channel 20, heat exchange amount increases, and is reduced by the temperature of flue gas afterwards.
Certainly, in embodiment one and embodiment two, can arrange in heat exchanger channels 10 simultaneously regulate heat exchange switch 12, arrange in put-through channel 20 and regulate through swtich 21.
In this enforcement, improving one's methods of flue:
By in flue, the heat exchanger fin of middle vertical setting is removed, and is then isolated in the region having heat exchanger fin and do not have a heat exchanger fin, forms heat exchanger channels and put-through channel, then in heat exchanger channels, arrange adjustment heat exchange switch.The area compensating heat-transfer surface can be equal to or less than removed heat exchange area in put-through channel.
Certainly, in embodiment one and embodiment two, can arrange in heat exchanger channels 10 simultaneously regulate heat exchange switch 12, arrange in put-through channel 20 and regulate through swtich 21.
Claims (10)
1. control a flue for cigarette temperature, it is characterized in that: comprise at least one heat exchanger channels and at least one put-through channel.
2. flue as claimed in claim 1, is characterized in that:
Wherein, described put-through channel has through swtich, and described through swtich can regulate folding angle.
3. control the flue of cigarette temperature as claimed in claim 1, it is characterized in that:
Wherein, described heat exchanger channels has heat exchange switch, and described heat exchange switch can regulate folding angle.
4. control the flue of cigarette temperature as claimed in claim 1, it is characterized in that:
Wherein, described heat exchanger channels and described put-through channel are symmetrical arranged.
5., as controlled the flue of cigarette temperature in Claims 1-4 as described in any one, it is characterized in that:
Also comprise reaction unit;
Before described heat exchanger channels and described put-through channel are arranged on described reaction unit.
6. control the flue of cigarette temperature as claimed in claim 5, it is characterized in that:
Also comprise compensation heat-transfer surface, after being arranged on described reaction unit.
7. a method for fibre selection, is characterized in that:
When heightening cigarette temperature, controlling flue gas and preferentially passing through from put-through channel; When turning down cigarette temperature, controlling flue gas and preferentially passing through from heat exchanger channels.
8. the method for fibre selection as claimed in claim 7, is characterized in that:
Wherein, control mode regulates through swtich, and when through swtich cuts out put-through channel, flue gas passes through from heat exchanger channels completely, and along with the opening degree of through swtich increases, flue gas preferentially passes through from put-through channel.
9. the method for fibre selection as claimed in claim 7, is characterized in that:
Wherein, control mode regulates heat exchange switch, and when heat exchange switch cuts out heat exchanger channels, flue gas passes through from put-through channel completely, and along with the opening degree of heat exchange switch increases, flue gas passes through from heat exchanger channels.
10. the improving one's methods an of flue, is characterized in that:
The part heat exchanger fin of the vertical setting in flue is removed, then the region having heat exchanger fin and do not have a heat exchanger fin is isolated, formation heat exchanger channels and put-through channel, then by-pass cock is set in heat exchanger channels and/or put-through channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610066567.8A CN105546562A (en) | 2016-01-29 | 2016-01-29 | Flue and control method for controlling smoke temperature and improvement method for flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610066567.8A CN105546562A (en) | 2016-01-29 | 2016-01-29 | Flue and control method for controlling smoke temperature and improvement method for flue |
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| Publication Number | Publication Date |
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| CN105546562A true CN105546562A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610066567.8A Pending CN105546562A (en) | 2016-01-29 | 2016-01-29 | Flue and control method for controlling smoke temperature and improvement method for flue |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841136A (en) * | 2016-05-20 | 2016-08-10 | 陈增宏 | Coal economizer system for boiler SCR denitrification |
| CN108731027A (en) * | 2018-06-15 | 2018-11-02 | 国电科学技术研究院有限公司 | A kind of control system and method for Rear of Utility Boiler smoke temperature |
| WO2020192035A1 (en) * | 2019-03-28 | 2020-10-01 | 马成果 | Heat exchange flue and heat exchange device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841136A (en) * | 2016-05-20 | 2016-08-10 | 陈增宏 | Coal economizer system for boiler SCR denitrification |
| CN108731027A (en) * | 2018-06-15 | 2018-11-02 | 国电科学技术研究院有限公司 | A kind of control system and method for Rear of Utility Boiler smoke temperature |
| WO2020192035A1 (en) * | 2019-03-28 | 2020-10-01 | 马成果 | Heat exchange flue and heat exchange device |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20160504 |