CN209485105U - A kind of primary and secondary air progressive solution system based on the coupling of machine furnace - Google Patents
A kind of primary and secondary air progressive solution system based on the coupling of machine furnace Download PDFInfo
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- CN209485105U CN209485105U CN201920025223.1U CN201920025223U CN209485105U CN 209485105 U CN209485105 U CN 209485105U CN 201920025223 U CN201920025223 U CN 201920025223U CN 209485105 U CN209485105 U CN 209485105U
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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
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Abstract
The utility model belongs to a kind of primary and secondary air progressive solution system based on the coupling of machine furnace in power plant for energy conservation field, mainly includes the parts such as boiler, steam turbine, smoke secondary wind heat exchanger, high temperature feedwater heater, medium temperature circulating water heater, cryogenic temperature condensation water heater, First air heater and Secondary Air heater.The heat-exchange system of boiler cold end, Steam Turbine Regenerative System is reconstructed in the system: being heated using condensed water and high-temperature flue gas to a Secondary Air；Condensed water and the water supply that heating heat regenerative system is substituted using high-temperature flue gas, reduce regenerative steam flow；First air is directly heated to target temperature in a manner of the blending for the cold and hot First air for replacing current unit to generally use, thus bring is reduced and damages；Rotary regenerative air preheater is substituted with tubular air preheater, reduces loss of leaking out；Multiple stage heater is set and preheats primary and secondary air, compared to smoke pre-heating is directly used, heat transfer temperature difference is greatly reduced.The system can be improved full factory's efficiency, reduce power generation energy consumption.
Description
Technical field
The utility model belongs to power station field of energy-saving technology, in particular to a kind of Secondary Air classification based on the coupling of machine furnace
Heating system.
Background technique
Currently, China be in the world maximum power generation and consumption big country.By the end of the year in 2017, China's power generation
Total installation of generating capacity is 1,777,080,000 kilowatts, wherein 1,104,950,000 kilowatts of thermal power generation.1000000 multikilowatt fired power generating units reach 103
Platform, 600,000 kilowatts and the above fired power generating unit capacity proportion reach 44.7%.Although thermal power generation institute in entire power industry
Accounting decreases again, but within the quite a long time from now on, and thermal power generation, which remains unchanged, can occupy the master of China's power industry
Body status.
With increasingly strict, the continuous improvement of the continuous soaring and energy-saving and emission-reduction policy requirement of energy prices in recent years
Efficiency of plant reduces the emphasis that unit net coal consumption rate greatly develops thermoelectricity as China from now on.In traditional thermal power generation unit
In, it generallys use trisector air heater and one Secondary Air is heated.This mode air mass flow is big, inleakage
Also larger, it cannot achieve an air temperature and adjust.Reach the inlet temperature requirements of coal pulverizer, it is necessary to using temperature adjustment First air and
The mode of heat primary air blending.There are huge damages during cold and hot First air blending, therefore the heating process of First air has
Biggish energy-saving potential.
The utility model proposes an a kind of Secondary Air heating systems based on the coupling of machine furnace, utilize heat exchanger, lead division
Fractional condensation, which is born water, is heated to target temperature for First air with water supply, introduces coal pulverizer.Secondary Air is heated to using heat exchanger simultaneously
After certain temperature, extension high-temperature flue gas is continued to be heated to target temperature, introduces burner hearth.Directly First air is added in this way
Heat effectively reduces cold and hot First air blending bring damage to coal pulverizer inlet wind-warm syndrome；With coagulating for flue gas heat regenerative system
It bears water and water supply, reduces the same level steam extraction amount, increase steam turbine power；Rotary air preheat is substituted with tubular air preheater
Device reduces loss of leaking out；Using multiple stage heater, the temperature gradient of heating process is reduced, reduces heater damage.It is based on
The above various advantages, the optimal way can be improved generatine set heat efficiency, reduce power plant's energy consumption.
Summary of the invention
The purpose of this utility model is the problems such as damaging and leak out present in traditional Thermal generation unit, to propose
A novel Secondary Air based on machine furnace coupling technique is classified heating system.The system mainly includes that the system mainly includes coal-grinding
Machine, burner hearth, economizer, smoke secondary wind heat exchanger, high temperature feedwater heater, medium temperature circulating water heater, low-temperature condensate add
Hot device, First air heater, Secondary Air heater, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder；It is characterized by: economizer 1 after according to
Secondary arrangement smoke secondary wind heat exchanger 2, high temperature feedwater heater 3, medium temperature circulating water heater 4 and cryogenic temperature condensation water heater 5；
Primary air fan 6 and first order First air heater 7, second level First air heater 8, third level First air heater 9 are successively gone here and there
Connection；First order First air heater 7 recycles water inlet and is connected with the outlet of cryogenic temperature condensation water heater 5, circulating water outlet and the 8th
Grade 24 entrance of low-pressure heater is connected；The entrance of second level First air heater 8 and outlet phase with medium temperature circulating water heater 4
Even, the outlet mouth of second level First air heater 8 is connected with the entrance of medium temperature circulating water heater 4；Third level First air adds
Hot 9 feed-water intake of device is connected with high temperature feedwater heater 3, and feedwater outlet is connected with 18 feed-water intake of third level high-pressure heater；
Third level First air heater 9 is connected with coal pulverizer 14；Secondary air fan 10, first order Secondary Air heater 11, the second level are secondary
Wind heater 12, third level Secondary Air heater 13 are sequentially connected in series；First order Secondary Air heater 11 condenses water inlet and low temperature
The outlet of condensation water heater 5 is connected, and condensation water out condenses water inlet with the 8th grade of low-pressure heater 24 and is connected；The second level is secondary
Wind heater 12 is connected with medium temperature circulating water heater 4 by circulating water pipeline；13 feed-water intake of third level Secondary Air heater
It is connected with high temperature feedwater heater 3, feedwater outlet is connected with 19 feed-water intake of third level high-pressure heater；The heat exchange of smoke secondary wind
Device 2 is connected with the burner hearth of boiler 15.
The First air entrance is primary by first order First air heater 7, second level First air heater 8, the third level
Wind heater 9 is connected with coal pulverizer 14, and First air is without cold and hot blending, in the heater heat exchange heating.
The Secondary Air entrance passes through first order Secondary Air heater 11, second level Secondary Air heater 12, the third level two
Secondary wind heater 13 is connected with smoke secondary wind heat exchanger 2, Secondary Air first through three-level heater heating after with flue gas heat exchange.
The high temperature feedwater heater 3 is connected with third level First air heater 9 and third level Secondary Air heater 13, in
Warm circulating water heater 4 is connected with second level First air heater 8 and second level Secondary Air heater 12, low-temperature circulating water heating
Device 5 is connected with first order First air heater 7 and first order Secondary Air heater 11, in flue gas respectively heater
Water.
The utility model have the following advantages that and the utility model has the advantages that using low-grade condensed water heat Secondary Air, instead of
The high-grade flue gas in part, reduces high-grade heat-energy losses；Replace cold and hot First air mixed with the mode for directly heating First air
It closes, reduces thus bring damage；Rotary regenerative air preheater is substituted with tubular air preheater, reduces loss of leaking out；Benefit
With flue gas condensed water and water supply, reduce the same level steam extraction amount；Rotary regenerative air preheater is replaced with tubular air preheater,
Reduce inleakage；Multiple stage heater is set, the temperature difference of every grade of heating is reduced, reduces heater damage.The above advantage can
To improve generatine set heat efficiency, power plant's energy consumption is reduced.
Detailed description of the invention
Fig. 1 is a kind of Secondary Air classification heating system based on machine furnace coupling technique.
Specific embodiment
The utility model proposes a kind of, and a Secondary Air based on machine furnace coupling technique is classified heating system.With reference to the accompanying drawing
It is explained with example.The system mainly includes that the system mainly includes coal pulverizer, burner hearth, economizer, the heat exchange of smoke secondary wind
Device, high temperature feedwater heater, medium temperature circulating water heater, cryogenic temperature condensation water heater, First air heater, Secondary Air heating
Device, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder；It is characterized by: being sequentially arranged smoke secondary wind heat exchanger 2, high temperature after economizer 1
Feed-water heater 3, medium temperature circulating water heater 4 and cryogenic temperature condensation water heater 5；Primary air fan 6 and the heating of first order First air
Device 7, second level First air heater 8, third level First air heater 9 are sequentially connected in series；7 recirculated water of first order First air heater
Entrance is connected with the outlet of cryogenic temperature condensation water heater 5, and circulating water outlet is connected with the 8th grade of 24 entrance of low-pressure heater；The second level
The entrance of First air heater 8 is connected with the outlet of medium temperature circulating water heater 4, the outlet of second level First air heater 8
Mouth is connected with the entrance of medium temperature circulating water heater 4；9 feed-water intake of third level First air heater and high temperature feedwater heater
3 are connected, and feedwater outlet is connected with 18 feed-water intake of third level high-pressure heater；Third level First air heater 9 and coal pulverizer 14
It is connected；Secondary air fan 10, first order Secondary Air heater 11, second level Secondary Air heater 12, third level Secondary Air heater
13 are sequentially connected in series；First order Secondary Air heater 11 condenses water inlet and is connected with the outlet of cryogenic temperature condensation water heater 5, and condensed water goes out
Mouth condenses water inlet with the 8th grade of low-pressure heater 24 and is connected；Second level Secondary Air heater 12 and medium temperature circulating water heater 4
It is connected by circulating water pipeline；13 feed-water intake of third level Secondary Air heater is connected with high temperature feedwater heater 3, feedwater outlet
It is connected with 19 feed-water intake of third level high-pressure heater；Smoke secondary wind heat exchanger 2 is connected with the burner hearth of boiler 15.
As shown in Figure 1, First air is introduced directly into first order First air heater 7 in First air progressive solution system
In, it 30 DEG C or so when introducing from primary air fan 6, is heated to leave 260 DEG C after third level First air heater 9, then directly
It taps into coal pulverizer 14 and is mixed with coal dust.Avoid cold and hot First air blending bring damage.
Secondary Air is first exchanged heat with water supply, is heated to third level Secondary Air heater 13 by 30 DEG C of 10 import of secondary air fan
It 260 DEG C behind outlet, enters back into and is warming up to 320 DEG C in smoke secondary wind heat exchanger 2 with flue gas heat exchange, be sent into 15 burner hearth of boiler
Auxiliary combustion displaces part high-grade thermal energy.
Flue gas water supply and condensed water are used in high temperature feedwater heater 3 and cryogenic temperature condensation water heater 5, reduce this
Grade steam extraction amount.
First order First air heater 7, second level First air heater 8, third level First air heater 9 and the first order two
Secondary wind heater 11, second level Secondary Air heater 12, third level Secondary Air heater 13 are all using tubular air preheater
Instead of rotary regenerative air preheater, inleakage is reduced.
The utility model utilizes one Secondary Air of condensed water and water supply progressive solution, and Secondary Air is again by flue gas to target temperature
Degree.Cold and hot First air blending has been fully phased out, cold and hot First air blending bring damage is thoroughly avoided.It is returned using flue gas
The water supply of hot systems and recirculated water reduce the steam extraction amount of this grade.Break the barrier between boiler and steam turbine, to cold air heating, coagulates
Bear water/water supply heating heat source, cold source carry out reconfiguring matching, to reduce the damage of heating process.This optimal way is filled
Realize energy counterpart and cascade utilization with dividing, improves the utilization rate of waste heat of coal unit significantly, improves economic effect
Benefit.
By taking certain domestic 1000MW unit as an example, after above-mentioned transformation, unit net coal consumption rate can reduce 2.39g/kWh.
Unit annual runing time 5500 hours equipment life 30 years, calculates for 0.41 yuan according to the every degree of electricity price, removing equipment investment,
The expenditure such as annual O&M, can about make a profit 16,000,000 RMB every year.
Claims (5)
1. a kind of primary and secondary air progressive solution system based on the coupling of machine furnace, which mainly includes that the system mainly includes mill
Coal machine, burner hearth, economizer, smoke secondary wind heat exchanger, high temperature feedwater heater, medium temperature circulating water heater, low-temperature condensate
Heater, First air heater, Secondary Air heater, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder；It is characterized by: economizer (1) it
After be sequentially arranged smoke secondary wind heat exchanger (2), high temperature feedwater heater (3), medium temperature circulating water heater (4) and cryogenic temperature condensation
Water heater (5)；Primary air fan (6) and first order First air heater (7), second level First air heater (8), the third level one
Secondary wind heater (9) is sequentially connected in series；First order First air heater (7) recycles water inlet and cryogenic temperature condensation water heater (5) go out
Mouth is connected, and circulating water outlet is connected with the 8th grade of low-pressure heater (24) entrance；The entrance of second level First air heater (8) and
It is connected with the outlet of medium temperature circulating water heater (4), the outlet of second level First air heater (8) and medium temperature circulating water heater
(4) entrance is connected；Third level First air heater (9) feed-water intake is connected with high temperature feedwater heater (3), feedwater outlet with
Third level high-pressure heater (18) feed-water intake is connected；Third level First air heater (9) is connected with coal pulverizer (14)；Secondary Air
Machine (10), first order Secondary Air heater (11), second level Secondary Air heater (12), third level Secondary Air heater (13) according to
Secondary series connection；First order Secondary Air heater (11) condenses water inlet and is connected with cryogenic temperature condensation water heater (5) outlet, and condensed water goes out
Mouth is connected with the 8th grade of low-pressure heater (24) condensation water inlet；Second level Secondary Air heater (12) and medium temperature circulating water heating
Device (4) is connected by circulating water pipeline；Third level Secondary Air heater (13) feed-water intake and high temperature feedwater heater (3) phase
Even, feedwater outlet is connected with third level high-pressure heater (19) feed-water intake；Smoke secondary wind heat exchanger (2) and boiler (15)
Burner hearth is connected.
2. a kind of primary and secondary air progressive solution system based on the coupling of machine furnace according to claim 1, which is characterized in that
First air enters first order First air heater (7) by primary air fan (6), then in turn through second level First air heater
(8) and third level First air heater (9) it, directly heats without cold and hot blending procedure to coal pulverizer (14), realizes primary
The progressive solution of wind avoids cold and hot First air blending.
3. a kind of primary and secondary air progressive solution system based on the coupling of machine furnace according to claim 1, which is characterized in that
The Secondary Air for leaving third level Secondary Air heater (13), which enters in smoke secondary wind heat exchanger (2), is warming up to mesh with flue gas heat exchange
Mark temperature.
4. a kind of primary and secondary air progressive solution system based on the coupling of machine furnace according to claim 1, which is characterized in that
It is provided with high temperature feedwater heater (3), medium temperature circulating water heater (4) and cryogenic temperature condensation water heater (5) in back-end ductwork, is used
Flue gas heats water supply, recirculated water and condensed water.
5. a kind of primary and secondary air progressive solution system based on the coupling of machine furnace according to claim 1, which is characterized in that
First order First air heater (7), second level First air heater (8), third level First air heater (9) and the first order are secondary
Wind heater (11), second level Secondary Air heater (12), third level Secondary Air heater (13) are tubular air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920025223.1U CN209485105U (en) | 2019-01-08 | 2019-01-08 | A kind of primary and secondary air progressive solution system based on the coupling of machine furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920025223.1U CN209485105U (en) | 2019-01-08 | 2019-01-08 | A kind of primary and secondary air progressive solution system based on the coupling of machine furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209485105U true CN209485105U (en) | 2019-10-11 |
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ID=68130366
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920025223.1U Expired - Fee Related CN209485105U (en) | 2019-01-08 | 2019-01-08 | A kind of primary and secondary air progressive solution system based on the coupling of machine furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN209485105U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413269A (en) * | 2022-01-24 | 2022-04-29 | 西安西热锅炉环保工程有限公司 | System and method for increasing sludge and garbage disposal amount of garbage power plant |
-
2019
- 2019-01-08 CN CN201920025223.1U patent/CN209485105U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413269A (en) * | 2022-01-24 | 2022-04-29 | 西安西热锅炉环保工程有限公司 | System and method for increasing sludge and garbage disposal amount of garbage power plant |
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| 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: 20191011 Termination date: 20210108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |