CN208124270U - A kind of gas cooler and fume afterheat providing warm air device association system - Google Patents
A kind of gas cooler and fume afterheat providing warm air device association system Download PDFInfo
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- CN208124270U CN208124270U CN201820581246.6U CN201820581246U CN208124270U CN 208124270 U CN208124270 U CN 208124270U CN 201820581246 U CN201820581246 U CN 201820581246U CN 208124270 U CN208124270 U CN 208124270U
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Abstract
The utility model discloses a kind of gas coolers and fume afterheat providing warm air device association system, the water inlet of first booster pump is connected with the water outlet of No. 7 low-pressure heaters, the water inlet of level-one gas cooler is connected with the water outlet of the first booster pump, and the water outlet of level-one gas cooler is connected with the water outlet of No. 6 low-pressure heaters.The water inlet of steam air heater is connected with the water outlet of the second booster pump, and the water outlet of steam air heater is connected with the water inlet of secondary smoke cooler, and the water inlet of the second booster pump is connected with the water outlet of secondary smoke cooler.The air outlet of steam air heater is connected with the air intake vent of air preheater, and the exhanst gas outlet of air preheater is connected with the entrance of smoke processing system.Desulfurizing tower inlet flue gas temperature is greatly reduced as the heat source of steam air heater in the hot water that the utility model is exported using gas cooler, achievees the purpose that disappear white, and energy conservation and environmental protection is highly-safe.
Description
Technical field
The utility model belongs to generating set technical field, is related to a kind of gas cooler and fume afterheat providing warm air device joins
Collaboration system.
Background technique
Exhaust gas temperature generally maintains 125~150 DEG C of left and right horizontals, high fume temperature in China's active service fired power generating unit
It is a universal phenomenon.Influence of the exhaust gas temperature to boiler safety, economy is mainly manifested in the following aspects：
1) exhaust gas temperature increases, the thermal efficiency decline of boiler,
2) exhaust gas temperature increases, and increases exhaust gas volumn, reduces the efficiency of electric precipitator.And fly ash resistivity will rise to
1011More than (Ω cm), fly ash resistivity enters in the range of unsuitable electric precipitation work, reduces the efficiency of electric precipitator.
3) exhaust gas temperature increases, so that blower, deduster working environment deteriorate, shortens the service life of equipment, increases accident
Rate influences unit safety.
4) flue gas disappears white major measure as heating technique after first condensation at present, and condensation needs a large amount of cold source, and its time
The fume afterheat of receipts is unable to get effective utilization.
The mainstream technology for reducing exhaust gas temperature at present is low low-level (stack-gas) economizer, is mounted on before deduster, by smoke evacuation temperature
Degree reduces, and improves efficiency of dust collection, reduces wet desulfuration tower water consume, and the heat of recycling is used to heat-setting water, squeezes low-pressure heating
Device steam extraction reduces coal consumption for power generation.But its heat grade recycled is lower, can only be used to squeeze low-grade steam extraction, energy-saving effect has
Limit.
Station boiler is the low-temperature corrosion for avoiding air preheater back-end surfaces, generally installs steam air heater additional in air preheater entrance.
Increasingly strict with national environmental protection policy, the popularity rate of denitrating system is higher and higher, and unit carries out air preheater after denitration transformation
Often there is ammonium hydrogen sulfate deposition clogging phenomenon, installing steam air heater additional can be improved the cold end wall temperature of air preheater, so that ammonium hydrogen sulfate
Saltation point moves down, and is conducive to the purging of soot blower, therefore steam air heater is significant to unit safety, economy is improved.
Steam air heater is arranged on the cold air duct of air preheater entrance, the main steam extraction using steam turbine to Cryogenic air into
Row heating prevents low-temperature corrosion and blocks up the phenomenon of ash to improve the cold end wall temperature of air preheater.Previous steam air heater is mostly with auxiliary steam
For heat source, auxiliary steam pressure, temperature are higher, big with the heat transfer temperature difference of air, and steam air heater heating surface is smaller, but auxiliary steam is joined
Number is higher, and acting ability is stronger, and heating steam air heater causes coal consumption loss higher.The heating vapour source of steam air heater is oriented low-grade at present
The trend of steam extraction development, but the steam extraction amount of low-grade steam extraction is limited, and parameter is lower, it is possible to generate what steam air heater freezed in winter
Phenomenon.The parameter of low-grade steam extraction is lower, and specific volume is big, and extraction line is thick, and investment is big, and equal after 7 sections of steam extractions of general unit
The vacuum safety of entire unit will be jeopardized once steam air heater is revealed for negative pressure steam extraction.Though using steam as the steam air heater of heat source
Right heating surface is smaller, but blocked drain, vibration and leakage phenomenon often occurs, has an impact to the safety of unit.
Flue gas disappears at present, and thermal technology, condensation technology are to install flue gas condensing additional after desulfurizing tower to the mainly condensation of white technology again
Desulfurizing tower outlet smoke temperature is reduced by 5 DEG C or so using cold source by device, and the fume afterheat of recycling can only be diffused into air by cooling tower
In, not only waste heat is unable to get effective use, also will increase the burden of cooling tower, unfavorable to unit vacuum.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of gas cooler and flue gas
Residual heat heating wind device association system, the system reduce exhaust gas temperature, the heat condensation of absorption using level-one gas cooler
Water squeezes high-grade steam extraction, increases coal conservation；Exhaust gas temperature is reduced to 60 DEG C or so by secondary smoke cooler, absorption it is low
Grade heat is used to heat steam air heater, to improve exhaust gas temperature, converts high-grade heat for tow taste heat.
In order to achieve the above objectives, gas cooler described in the utility model and fume afterheat providing warm air device association system packet
Include steam air heater, air preheater, No. 7 low-pressure heaters, No. 6 low-pressure heaters, No. 5 low-pressure heaters and smoke processing system；
The water outlet of No. 7 low-pressure heaters is connected with the water inlet of the water inlet of the first booster pump and No. 6 low-pressure heaters
Logical, the water inlet of level-one gas cooler is connected with the water outlet of the first booster pump, the water outlet of level-one gas cooler and 6
The water outlet of number low-pressure heater is connected with the water inlet of No. 5 low-pressure heaters, the water inlet of steam air heater and the second booster pump
Water outlet be connected, the water outlet of steam air heater is connected with the water inlet of secondary smoke cooler, and the second booster pump enters water
Mouth is connected with the water outlet of secondary smoke cooler, and the air outlet of steam air heater is connected with the air intake vent of air preheater, empty
The exhanst gas outlet of air preheater is connected with the entrance of smoke processing system.
The smoke processing system includes level-one gas cooler, electric precipitator, air-introduced machine, secondary smoke cooler, takes off
Sulphur tower 6 and chimney, the entrance of level-one gas cooler are connected with the outlet of air preheater, the outlet of level-one gas cooler
Successively it is connected through electric precipitator, air-introduced machine, secondary smoke cooler and desulfurizing tower with chimney.
The secondary smoke cooler is made using fluoroplastics；Steam air heater is made using stainless steel；Second increases
Press pump is made using stainless steel；Secondary smoke cooler is made using stainless steel.
The entrance setting water quality survey system and constant pressure supply water system of second booster pump.
The water inlet of first booster pump is connected with the water outlet of No. 7 low-pressure heaters by the first valve；Level-one
The water outlet of gas cooler is connected by the second valve with the water inlet of No. 5 low-pressure heaters.
Pressure fan is communicated at the air intake of the steam air heater.
The utility model has the advantages that：
Gas cooler described in the utility model and fume afterheat providing warm air device association system at work, utilize second level
The recirculated water of gas cooler outlet heats steam air heater, is equal to using low-grade fume afterheat and heats steam air heater, saves
The auxiliary vapour for saving original heating steam air heater, reduces coal consumption for power generation, achieves energy-saving and emission reduction purposes, while avoiding using steam as heat source
The unfavorable phenomenon such as blocked drain, vibration and leakage that steam air heater often occurs, improves the safety of unit.Steam air heater is thrown throughout the year
Fortune, outlet wind-warm syndrome control 60 DEG C or more, can alleviate the blocking of air preheater, improve air preheater and export exhaust gas temperature.Level-one cigarette
Gas Cooler recycles smoke discharging residual heat, reduces the flue-gas temperature of deduster entrance, improves dust collector efficiency.Since there are two
Grade flue gas is cooling, the outlet smoke temperature of level-one gas cooler can control at 100 DEG C or so, and level-one gas cooler enters at this time
Mouth condensed water may be derived from No. 7 low-pressure heaters outlets can preferably realize to only squeeze 6 sections and 5 sections of high-grade steam extraction
Energy-saving and emission-reduction.Desulfurizing tower inlet flue gas temperature is reduced to 60 DEG C or so, and desulfurizing tower exit gas temperature is greatly reduced, and reaches water-saving and disappears
White purpose.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 it is air preheater, 2 be level-one gas cooler, 3 be electric precipitator, 4 be air-introduced machine, 5 is second level cigarette
Gas Cooler, 6 be desulfurizing tower, 7 be chimney, 8 be steam air heater, 9 be No. 5 low-pressure heaters, 10 be No. 6 low-pressure heaters, 11 be 7
Number low-pressure heater, 12 be the first booster pump, 13 be the second booster pump.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing：
With reference to Fig. 1, gas cooler described in the utility model and fume afterheat providing warm air device association system include warm wind
Device 8, air preheater 1,7 low-pressure heater 11,6 low-pressure heater 10, No. 5 low-pressure heaters 9 and smoke processing systems；
The water inlet of first booster pump 12 is connected with the water outlet of No. 7 low-pressure heaters 11, the water inlet of level-one gas cooler 2 with
The water outlet of first booster pump 12 is connected, the water outlet phase of the water outlet of level-one gas cooler 2 and No. 6 low-pressure heaters 10
Connection.The water inlet of steam air heater 8 is connected with the water outlet of the second booster pump 13, and the water outlet and secondary smoke of steam air heater 8 are cold
But the water inlet of device 5 is connected, and the water inlet of the second booster pump 13 is connected with the water outlet of secondary smoke cooler 5.
The air outlet of steam air heater 8 is connected with the air intake vent of air preheater 1, the exhanst gas outlet and cigarette of air preheater 1
The entrance of gas processing system is connected.
The smoke processing system includes level-one gas cooler 2, electric precipitator 3, air-introduced machine 4, secondary smoke cooler
5, the entrance of desulfurizing tower 6 and chimney 7, level-one gas cooler 2 is connected with the outlet of air preheater 1, and level-one flue gas is cooling
The outlet of device 2 is successively connected through electric precipitator 3, air-introduced machine 4, secondary smoke cooler 5 and desulfurizing tower 6 with chimney 7.
The secondary smoke cooler 5 is made using fluoroplastics；It steam air heater 8 and is adopted with the pipeline of its connection, valve
It is made with stainless steel；It second booster pump 13 and is made with the pipeline of its connection, valve using stainless steel；Secondary smoke
It cooler 5 and is made with the pipeline of its connection, valve using stainless steel.
The entrance setting water quality survey system and constant pressure supply water system of second booster pump 13.
The water inlet of first booster pump 12 is connected with the water outlet of No. 7 low-pressure heaters 11 by the first valve；
The water outlet of the level-one gas cooler 2 is connected by the second valve with the water outlet of No. 6 low-pressure heaters 10
It is logical；
Pressure fan is communicated at the air intake of steam air heater 8.
The specific work process of the utility model is：
No. 7 low-pressure heaters 11 outlet condensed water first entered after booster pump 12 in level-one gas cooler 2 into
Row heating, the condensed water after heating return to the outlet of No. 6 low-pressure heaters 10, exclusion taste higher 6 sections and 5 sections of steam turbines pumpings
Vapour reduces coal consumption for power generation, achieves energy-saving and emission reduction purposes.The recirculated water that secondary smoke cooler 5 exports passes through the second booster pump
Enter steam air heater 8 after 13, the recirculated water that steam air heater 8 exports is returned to 5 entrance of secondary smoke cooler to form circulation, quite
It is higher auxiliary instead of the taste for being originally used for heating steam air heater 8 in heating steam air heater 8 using lower fume afterheat is sampled
Steam is helped, reduces coal consumption for power generation, and highly-safe.6 inlet flue gas temperature of desulfurizing tower is reduced to 60 DEG C or so, and desulfurizing tower 6 is greatly reduced
Exit gas temperature achievees the purpose that water-saving and disappears white.
Cold air becomes hot-air after being heated by steam air heater 8, the hot-air that steam air heater 8 is discharged enters air preheater 1
In, the high-temperature flue gas that air preheater 1 is discharged enters in level-one gas cooler 2, by level-one gas cooler 2 by smoke temperature
Acid dew point is reduced to hereinafter, reducing fly ash resistivity, reduces flue gas flow, electricity can be improved when dedusting in electric precipitator 3 and removed
Then 3 efficiency of dirt device is discharged after 6 desulfurization of desulfurizing tower from chimney 7 again.
Claims (6)
1. a kind of gas cooler and fume afterheat providing warm air device association system, which is characterized in that including steam air heater (8), air
Preheater (1), No. 7 low-pressure heaters (11), No. 6 low-pressure heaters (10), No. 5 low-pressure heaters (9) and smoke processing system；
The water outlet of No. 7 low-pressure heaters (11) and the water inlet of the first booster pump (12) and No. 6 low-pressure heater (10) enter
The mouth of a river is connected, and the water inlet of level-one gas cooler (2) is connected with the water outlet of the first booster pump (12), and level-one flue gas is cold
But the water outlet of device (2) and the water outlet of No. 6 low-pressure heaters (10) are connected with the water inlet of No. 5 low-pressure heaters (9), warm up
The water inlet of wind device (8) is connected with the water outlet of the second booster pump (13), and the water outlet and secondary smoke of steam air heater (8) are cooling
The water inlet of device (5) is connected, and the water inlet of the second booster pump (13) is connected with the water outlet of secondary smoke cooler (5),
The air outlet of steam air heater (8) is connected with the air intake vent of air preheater (1), the exhanst gas outlet and flue gas of air preheater (1)
The entrance of processing system is connected.
2. a kind of gas cooler according to claim 1 and fume afterheat providing warm air device association system, which is characterized in that
The smoke processing system includes level-one gas cooler (2), electric precipitator (3), air-introduced machine (4), secondary smoke cooler
(5), the entrance of desulfurizing tower (6) and chimney (7), level-one gas cooler (2) is connected with the outlet of air preheater (1), and one
The outlet of grade gas cooler (2) is successively through electric precipitator (3), air-introduced machine (4), secondary smoke cooler (5) and desulfurizing tower (6)
It is connected with chimney (7).
3. a kind of gas cooler according to claim 1 and fume afterheat providing warm air device association system, which is characterized in that
The secondary smoke cooler (5) is made using fluoroplastics；Steam air heater (8) is made using stainless steel；Second pressurization
Pump (13) is made using stainless steel；Secondary smoke cooler (5) is made using stainless steel.
4. a kind of gas cooler according to claim 1 and fume afterheat providing warm air device association system, which is characterized in that
The entrance setting water quality survey system and constant pressure supply water system of second booster pump (13).
5. a kind of gas cooler according to claim 1 and fume afterheat providing warm air device association system, which is characterized in that
The water inlet of first booster pump (12) is connected with the water outlet of No. 7 low-pressure heaters (11) by the first valve；Level-one
The water outlet of gas cooler (2) is connected by the second valve with the water inlet of No. 5 low-pressure heaters (9).
6. a kind of gas cooler according to claim 1 and fume afterheat providing warm air device association system, which is characterized in that
Pressure fan is communicated at the air intake of the steam air heater (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820581246.6U CN208124270U (en) | 2018-04-23 | 2018-04-23 | A kind of gas cooler and fume afterheat providing warm air device association system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820581246.6U CN208124270U (en) | 2018-04-23 | 2018-04-23 | A kind of gas cooler and fume afterheat providing warm air device association system |
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| CN208124270U true CN208124270U (en) | 2018-11-20 |
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| CN201820581246.6U Active CN208124270U (en) | 2018-04-23 | 2018-04-23 | A kind of gas cooler and fume afterheat providing warm air device association system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442376A (en) * | 2018-12-11 | 2019-03-08 | 中国华能集团清洁能源技术研究院有限公司 | A kind of air heater and low-pressure coal saver joint utilize smoke discharging residual heat system |
| CN110645587A (en) * | 2019-11-01 | 2020-01-03 | 浙江城建煤气热电设计院有限公司 | Flue gas takes off white device condensate waste heat recovery and utilizes system |
-
2018
- 2018-04-23 CN CN201820581246.6U patent/CN208124270U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442376A (en) * | 2018-12-11 | 2019-03-08 | 中国华能集团清洁能源技术研究院有限公司 | A kind of air heater and low-pressure coal saver joint utilize smoke discharging residual heat system |
| CN110645587A (en) * | 2019-11-01 | 2020-01-03 | 浙江城建煤气热电设计院有限公司 | Flue gas takes off white device condensate waste heat recovery and utilizes system |
| CN110645587B (en) * | 2019-11-01 | 2023-11-17 | 浙江城建煤气热电设计院有限公司 | Condensate water waste heat recycling system of flue gas whitening device |
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