CN109442375A - Boiler system - Google Patents
Boiler system Download PDFInfo
- Publication number
- CN109442375A CN109442375A CN201811180877.8A CN201811180877A CN109442375A CN 109442375 A CN109442375 A CN 109442375A CN 201811180877 A CN201811180877 A CN 201811180877A CN 109442375 A CN109442375 A CN 109442375A
- Authority
- CN
- China
- Prior art keywords
- economizer
- boiler system
- denitrification apparatus
- water
- boiler
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/16—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
- F22D1/18—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways and heated indirectly
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
Abstract
The present invention relates to coal-fired plant's boiler system fields, disclose a kind of boiler system, including exhaust gases passes (10), denitrification apparatus (20), the first economizer (30) and the second economizer (40), the denitrification apparatus (20), first economizer (30) and second economizer (40) are all set in the exhaust gases passes (10), first economizer (30) is set to the denitrification apparatus (20) upstream, and second economizer (40) is set to the denitrification apparatus (20) downstream.Boiler system in the present invention is respectively provided with the first economizer 30 and the second economizer 40 in 20 upstream and downstream of denitrification apparatus, and exhaust gas temperature is greatly lowered.
Description
Technical field
The present invention relates to power plant boiler technical fields, more particularly to a kind of boiler system.
Background technique
Boiler system is in the pith of coal fired power plant, and in various thermal losses indexs, flue gas loss is boiler system
Maximum one in heat loss, for large and medium-sized station boiler when operating normally, flue gas loss accounts for boiler oil input heat
4% to 6%；And every 20 DEG C of the reduction of exhaust gas temperature, so that it may improve boiler efficiency 1% or so (reducing unit coal consumption is more than 1%).Row
Cigarette temperature drift not only directly affects boiler efficiency, the also water consumption of reduction dust collection efficiency and increase sulfur removal technology.To smoke evacuation
The problem of temperature drift, considers that should first boiler be transformed by reducing exhaust gas temperature from unit whole efficiency, and economizer changes
Hot coefficient is big, and carrying out economizer transformation has biggish investment return ratio.
Summary of the invention
The purpose of the invention is to overcome boiler system high fume temperature of the existing technology, heat waste consumption are big to ask
Topic.
To achieve the goals above, one aspect of the present invention provides a kind of boiler system, including exhaust gases passes, denitrification apparatus,
First economizer and the second economizer,
The denitrification apparatus, first economizer and second economizer are all set in the exhaust gases passes, institute
It states the first economizer and is set to the denitrification apparatus upstream, second economizer is set to the denitrification apparatus downstream.
Preferably, first economizer and second economizer series connection.
Preferably, second economizer is high-temperature economizer.
Preferably, the water inlet of second economizer is connected with feed pipe, and the feed pipe is close to second province
The position of coal device is provided with drain water piping.
Preferably, the water supply of the economizer system is followed by second economizer and first economizer.
Preferably, the boiler system further includes the steam for being set to several series connections above second economizer
Soot blower.
Preferably, the steam sootblower is half telescopic steam sootblower.
Preferably, the boiler system further includes helical water-cooled wall, the water outlet of first economizer and the spiral
Water-cooling wall connection.
Preferably, the boiler system further includes low temperature superheater, and the low temperature superheater is located at first economizer
Top.
Preferably, the boiler system further includes preheater, and the preheater is located at the downstream of second economizer.
Through the above technical solutions, smoke temperature is down to 369 DEG C after boiler tail flue gas flows through the first economizer, then filled through denitration
It postpones and is sent into the second economizer, the second economizer, which continues for smoke temperature to be reduced to 329 DEG C, is re-fed into preheater.Increase by the second economizer
Afterwards, 27 DEG C of pre-heater inlet wind-warm syndrome when, preheater outlet exhaust gas temperature can be reduced to improved 123 by 140 DEG C before being transformed
℃。
Detailed description of the invention
Fig. 1 is the schematic diagram of boiler system in an embodiment of the present invention.
Description of symbols
10- exhaust gases passes；
20- denitrification apparatus；
The first economizer of 30-；
The second economizer of 40-；
50- helical water-cooled wall；
60- low temperature superheater；
4- pendant superheater；5- high temperature superheater；6- low-temperature reheater；7- high temperature reheater；8- steam-water separator；9- storage
Water pot.
Specific embodiment
Core of the invention thought is to increase an economizer in original boiler system, to form new province's coal
Device system cools down the fume afterheat of flue gas pipeline, to reduce preheater outlet exhaust gas temperature.
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Refering to fig. 1, the schematic diagram of boiler system in present embodiment is shown, the boiler system includes that flue gas is logical
Road 10, denitrification apparatus 20, the first economizer 30 and the second economizer 40, the denitrification apparatus 20,30 and of the first economizer
Second economizer 40 is all set in the exhaust gases passes 10, and first economizer 30 is set to the denitrification apparatus 20
Upstream, second economizer 40 are set to 20 downstream of denitrification apparatus.Flue gas in exhaust gases passes 10 first passes through the first province
Coal device 30, the first economizer 30 cool down flue gas, and flue-gas temperature is made to be down to 369 DEG C or so, using denitrification apparatus 20, take off
Nitre device 20 carries out denitration process to flue gas, and generally, denitrification apparatus 20 uses SCR denitration, at 20 denitration of denitrification apparatus
After reason, flue gas passes through the second economizer 40, and the second economizer 40 further cools down to the flue gas in exhaust gases passes 10, makes flue gas temperature
Degree is down to 329 DEG C or so.After increasing the second economizer 40, at 27 DEG C of pre-heater inlet wind-warm syndrome, preheater exports exhaust gas temperature
Improved 123 DEG C can be reduced to by 140 DEG C before being transformed.
First economizer 30 and second economizer 40 can be connected in parallel, and can also be connected in series, in order to improve water
Utilization rate, it is preferable that first economizer 30 and second economizer 40 series connection.Further, it is preferable that province's coal
The water supply of device system is followed by second economizer 40 and first economizer 30.That is, water supply is from the second province
The water inlet of coal device 40 enters the second economizer 40 and the first economizer 30 is flowed to, through the first economizer after the second economizer 40
Other component, such as water-cooling wall, return pipe etc. are flow to after 30 again.In the present embodiment, spiral shell is flow to after the first economizer 30
Revolve water-cooling wall 50.Specifically, the boiler system further includes helical water-cooled wall 50, the water outlet of first economizer 30 and institute
State the connection of helical water-cooled wall 50.Helical water-cooled wall is the main heated portion of boiler, it is made of the row's of number steel pipe, is distributed in boiler
The surrounding of burner hearth.Its inside is flowing water, and the external world receives the heat of the flame of boiler furnace.It is main to absorb burner hearth high temperature
The radiations heat energy of combustion product, working medium make ascending motion wherein, by thermal evaporation.
Wherein, second economizer 40 be high-temperature economizer, the high-temperature economizer can cooling extent up to 40 DEG C or so.
In the present embodiment, the water inlet of second economizer 40 is connected with feed pipe (not shown), described
Feed pipe is provided with drain water piping in the position close to second economizer 40.The specification of drain water piping is 73 × 13mm of φ.
Further, the boiler system further includes being set to several steamings being connected in parallel of 40 top of the second economizer
Vapour soot blower.Steam sootblower is connected in heated surface at the end of boiler soot blowing circuit.Specifically, the steam sootblower is partly to stretch
Contracting formula steam sootblower.
Further, the boiler system further includes low temperature superheater 60, and the low temperature superheater 60 is located at first province
The top of coal device 30.
The boiler system further includes preheater, and the preheater is located at the downstream of second economizer 40.
Boiler system in present embodiment may further comprise: pendant superheater 4, high temperature superheater 5, low-temperature reheater
6, the components such as high temperature reheater 7, steam-water separator 8, water tank 9.The specific location and connection relationship of these components and existing skill
Boiler system is identical in art, and specific in combination with Fig. 1, it will not be described here.
In conclusion the boiler system in present embodiment is respectively provided with the first province in 20 upstream and downstream of denitrification apparatus
Coal device 30 and the second economizer 40, are greatly lowered exhaust gas temperature.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited thereto.At this
It, can be with various simple variants of the technical solution of the present invention are made in the range of the technology design of invention.Including each particular technique
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways
No further explanation will be given.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention
Protection scope.
Claims (10)
1. a kind of boiler system, which is characterized in that including exhaust gases passes (10), denitrification apparatus (20), the first economizer (30) and
Second economizer (40),
It is logical that the denitrification apparatus (20), first economizer (30) and second economizer (40) are all set in the flue gas
In road (10), first economizer (30) is set to the denitrification apparatus (20) upstream, the second economizer (40) setting
In the denitrification apparatus (20) downstream.
2. boiler system according to claim 1, which is characterized in that first economizer (30) and second province coal
Device (40) series connection.
3. boiler system according to claim 1, which is characterized in that second economizer (40) is high-temperature economizer.
4. boiler system according to claim 1, which is characterized in that the water inlet of second economizer (40) is connected with
Feed pipe, the feed pipe are provided with drain water piping in the position close to second economizer (40).
5. boiler system according to claim 1, which is characterized in that the water supply of the economizer system is followed by described
Second economizer (40) and first economizer (30).
6. boiler system according to claim 5, which is characterized in that the boiler system further includes being set to described second
Several steam sootblowers being connected in parallel above economizer (40).
7. boiler system according to claim 6, which is characterized in that the steam sootblower is half telescopic steam soot blowing
Device.
8. boiler system according to claim 5, which is characterized in that the boiler system further includes helical water-cooled wall
(50), the water outlet of first economizer (30) is connected to the helical water-cooled wall (50).
9. boiler system according to claim 5, which is characterized in that the boiler system further includes low temperature superheater
(60), the low temperature superheater (60) is located at the top of first economizer (30).
10. boiler system according to claim 5, which is characterized in that the boiler system further includes preheater, described pre-
Hot device is located at the downstream of second economizer (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811180877.8A CN109442375A (en) | 2018-10-09 | 2018-10-09 | Boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811180877.8A CN109442375A (en) | 2018-10-09 | 2018-10-09 | Boiler system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109442375A true CN109442375A (en) | 2019-03-08 |
Family
ID=65545127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811180877.8A Pending CN109442375A (en) | 2018-10-09 | 2018-10-09 | Boiler system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109442375A (en) |
Citations (9)
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|---|---|---|---|---|
| CN202709159U (en) * | 2012-07-05 | 2013-01-30 | 东方电气集团东方锅炉股份有限公司 | Boiler capable of meeting full-load operation low exhaust temperature of selective catalytic reduction (SCR) denitration device |
| CN103084064A (en) * | 2013-01-18 | 2013-05-08 | 广东电网公司电力科学研究院 | System and method for improving operation capacity of SCR (Silicon Controlled Rectifier) denitration device in electric power plant |
| CN103263828A (en) * | 2013-05-20 | 2013-08-28 | 上海绿澄环保科技有限公司 | Fume gas denitration system of coal-fired boiler based on SNCR (Selective Non-catalytic Reduction) and SCR (Selective Catalytic Reduction) combination method |
| CN203215655U (en) * | 2013-03-23 | 2013-09-25 | 安徽金鼎锅炉股份有限公司 | Drainable coal economizer |
| CN103846007A (en) * | 2014-03-17 | 2014-06-11 | 山西新唐工程设计有限公司 | Denitration control method of flue-gas selective catalytic reduction device |
| CN204063067U (en) * | 2014-08-11 | 2014-12-31 | 大唐彬长发电有限责任公司 | A kind of soot blower system |
| CN104258727A (en) * | 2014-09-24 | 2015-01-07 | 浙江大学 | SCR (Selective Catalytic Reduction) flue gas denitrification reactor with SCR coal economizer |
| CN105222114A (en) * | 2015-10-27 | 2016-01-06 | 哈尔滨电站设备成套设计研究所有限公司 | The low NO of economizer sectional boiler full load xdevice and remodeling method |
| CN108518664A (en) * | 2018-05-31 | 2018-09-11 | 哈尔滨锅炉厂有限责任公司 | One kind matching the tower damper adjustment boiler using brown coal of fan mill high capacity highly effective ultra supercritical |
-
2018
- 2018-10-09 CN CN201811180877.8A patent/CN109442375A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| CN202709159U (en) * | 2012-07-05 | 2013-01-30 | 东方电气集团东方锅炉股份有限公司 | Boiler capable of meeting full-load operation low exhaust temperature of selective catalytic reduction (SCR) denitration device |
| CN103084064A (en) * | 2013-01-18 | 2013-05-08 | 广东电网公司电力科学研究院 | System and method for improving operation capacity of SCR (Silicon Controlled Rectifier) denitration device in electric power plant |
| CN203215655U (en) * | 2013-03-23 | 2013-09-25 | 安徽金鼎锅炉股份有限公司 | Drainable coal economizer |
| CN103263828A (en) * | 2013-05-20 | 2013-08-28 | 上海绿澄环保科技有限公司 | Fume gas denitration system of coal-fired boiler based on SNCR (Selective Non-catalytic Reduction) and SCR (Selective Catalytic Reduction) combination method |
| CN103846007A (en) * | 2014-03-17 | 2014-06-11 | 山西新唐工程设计有限公司 | Denitration control method of flue-gas selective catalytic reduction device |
| CN204063067U (en) * | 2014-08-11 | 2014-12-31 | 大唐彬长发电有限责任公司 | A kind of soot blower system |
| CN104258727A (en) * | 2014-09-24 | 2015-01-07 | 浙江大学 | SCR (Selective Catalytic Reduction) flue gas denitrification reactor with SCR coal economizer |
| CN105222114A (en) * | 2015-10-27 | 2016-01-06 | 哈尔滨电站设备成套设计研究所有限公司 | The low NO of economizer sectional boiler full load xdevice and remodeling method |
| CN108518664A (en) * | 2018-05-31 | 2018-09-11 | 哈尔滨锅炉厂有限责任公司 | One kind matching the tower damper adjustment boiler using brown coal of fan mill high capacity highly effective ultra supercritical |
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Application publication date: 20190308 |