CN206771402U - A kind of energy-saving and water-saving system for wet desulfurization system - Google Patents
A kind of energy-saving and water-saving system for wet desulfurization system Download PDFInfo
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- CN206771402U CN206771402U CN201720449342.0U CN201720449342U CN206771402U CN 206771402 U CN206771402 U CN 206771402U CN 201720449342 U CN201720449342 U CN 201720449342U CN 206771402 U CN206771402 U CN 206771402U
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- demister
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses a kind of energy-saving and water-saving system for wet desulfurization system, including one-level gas cooler, flue gas input channel, flue gas pretreatment system, secondary smoke cooler, desulfurizing tower, flue demister, flue gas condenser, chimney demister, chimney and steam air heater, the system can effectively reduce the rate of water make-up of desulfurizing tower, the flue gas heat recovery of chimney entrance is realized simultaneously, and cost is relatively low, can effectively alleviate chimney emits white cigarette phenomenon and chimney rain phenomenon.
Description
Technical field
The utility model belongs to energy-saving and water-saving technical field, is related to a kind of energy-saving water system for wet desulfurization system
System.
Background technology
Severe with sending out the day of Environmental Protection Situation in recent years, the thermal power plant of the country more than 90% has installed wet desulphurization system additional
System, wet desulfurization system inlet flue gas temperature general control is at 90 DEG C or so, if continuing to reduce, can destroy desulfurizing tower water balance, lead
The sewage quantity increase of desulfurizing tower discharge is caused, substantially increases cost of sewage disposal, but when the inlet flue gas temperature control of desulfurizing tower exists
At 90 DEG C or so, then it can increase the rate of water make-up of desulfurizing tower.
The unit chimney for the high-moisture coal such as saturation wet flue gas, combusting brown coal that flue gas after wet desulphurization is 48 DEG C or so
The temperature of entrance saturation wet flue gas can reach 54 DEG C or so.Contain substantial amounts of moisture, the meeting after smoke stack emission in the wet cigarette of saturation
Formed in chimney breast and obviously emit white cigarette phenomenon, or even chimney rain phenomenon.
The many regional drought and water shortage in China, but whole unit requires supplementation with substantial amounts of industrial water, makes to a certain extent
It is difficult into power plant operation, and will be used to supplementing after the water condensation that carried in wet-method desulfurized fume the industrial water of power plant into
For a hot research topic.It was to install gas cooler additional in chimney gas approach in the past, using circulating water flue gas, so
Using air cooling device cooling circulating water again afterwards, this method can cause the waste heat of chimney inlet flue gas to be all discharged into air,
And whole system adds water circulation system and air cooling system, investment is higher.
Utility model content
The shortcomings that the purpose of this utility model is to overcome above-mentioned prior art, there is provided one kind is used for wet desulfurization system
Energy-saving and water-saving system, the system can effectively reduce the rate of water make-up of desulfurizing tower, while realize the fume afterheat of chimney entrance
Recycle, and cost is relatively low, and can effectively alleviate chimney emits white cigarette phenomenon and chimney rain phenomenon.
To reach above-mentioned purpose, the energy-saving and water-saving system described in the utility model for wet desulfurization system includes one-level
Gas cooler, flue gas input channel, flue gas pretreatment system, secondary smoke cooler, desulfurizing tower, flue demister, flue gas
Condenser, chimney demister, chimney and steam air heater；
The heat release side entrance of air preheater is connected with flue gas input channel, and the heat release side outlet of air preheater is successively
It is connected through one-level gas cooler and flue gas pretreatment system with the heat release side entrance of secondary smoke cooler, secondary smoke is cold
But the heat release side outlet of device is connected through desulfurizing tower and flue demister with the smoke inlet of flue gas condenser, flue gas condenser
Exhanst gas outlet is connected through chimney demister with chimney；
The air outlet slit of flue gas condenser is connected with the heat absorption side entrance of steam air heater, heat absorption side outlet and the sky of steam air heater
The heat absorption side entrance of air preheater is connected, and the heat absorption side outlet of secondary smoke cooler is connected with the heat release side entrance of steam air heater
Logical, the heat absorption side entrance of secondary smoke cooler is connected with the heat release side outlet of steam air heater.
Flue gas pretreatment system includes dry collector and air-introduced machine, one-level gas cooler successively through dry collector and
Air-introduced machine is connected with the heat release side entrance of secondary smoke cooler.
The air outlet slit of flue gas condenser is connected through pressure fan with the heat absorption side entrance of steam air heater.
One-level demister is provided with desulfurizing tower, flue demister and chimney demister are arranged at the exhaust pass of desulfurizing tower
It is interior.
Flue gas condenser includes flue, bellows and some heat exchanger tubes, and the outlet of flue demister is connected with one end of flue
Logical, the other end of flue is connected with chimney demister, and one end of each heat exchanger tube is connected with bellows, the other end of each heat exchanger tube
Pass through and be fixed on the side of flue, bellows are connected with pressure fan.
The three-dimensional rib plate pipe of heat exchanger tube equal wing for inside and outside.
Secondary smoke cooler is teflon heat exchanger.
Also include condensate input channel and condensate output channel, wherein, condensate input channel and one-level flue gas are cold
But the heat absorption side entrance of device is connected, and condensate output channel is connected with the heat absorption side outlet of one-level gas cooler.
Also include water treatment system, the discharge outlet of flue demister bottom, the discharge outlet and chimney of flue gas condenser bottom
The discharge outlet of demister bottom is connected after being confluxed by drainpipe with the entrance of water treatment system.
The utility model has the advantages that：
Energy-saving and water-saving system described in the utility model for wet desulfurization system passes through one-level cigarette in concrete operations
Gas Cooler absorbs the heat of flue gas, so that the temperature of flue gas reduces, the flue gas of one-level gas cooler discharge enters two
In level flue gas cooler, and continue to cool to flue gas by secondary smoke cooler, wherein, lead in secondary smoke cooler
The heat that recirculated water absorbs flue gas is crossed, the recirculated water after heat is absorbed and enters in the cold side of steam air heater the heat of absorption exchanges heat
Flue gas to the air of steam air heater heat absorbing side, while the output of secondary smoke cooler enters cigarette through desulfurizing tower and flue demister
In gas condenser, outdoor air is entered in steam air heater after the heat of flue gas is absorbed in flue gas condenser, realizes desulfurizing tower
The flue gas heat recovery of entrance and chimney entrance.In addition, the air of steam air heater output is entered in air preheater, so as to
The cigarette temperature of the effective wind-warm syndrome and outlet for improving air preheater entrance, improves the running environment of air preheater, improves simultaneously
The thermal efficiency of boiler and the caloric receptivity of one-level gas cooler, reduce unit coal consumption and cost.In addition, the utility model passes through drop
The low temperature for entering flue gas in desulfurizing tower, the rate of water make-up of desulfurizing tower is reduced, while chimney entrance is reduced by flue gas condenser
Cigarette temperature, alleviate chimney significantly and emit white cigarette phenomenon and chimney rain phenomenon.Simultaneously, it is necessary to which explanation, the utility model first lead to
Cross secondary smoke cooler to heat outdoor air, be then input to again in steam air heater, so as to avoid changing in steam air heater
There is frozen pipe phenomenon in heat pipe.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of secondary smoke cooler 5 in the utility model；
Fig. 3 is the sectional view in A-A directions in Fig. 2.
Wherein, 1 is that air preheater 1,2 is that one-level gas cooler 2,3 is that dry collector 3,4 is that air-introduced machine 4,5 is
Secondary smoke cooler 5,6 is that desulfurizing tower 6,7 is that flue demister 7,8 is that flue gas condenser 8,9 is that chimney demister 9,10 is
Chimney 10,11 is that steam air heater 11,12 is that booster pump 12,13 is that pressure fan 13,14 is that heat exchanger tube 14,15 is exhaust pass, 16 is
Bellows 16.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
With reference to figure 1, Fig. 2 and Fig. 3, the energy-saving and water-saving system described in the utility model for wet desulfurization system includes one
Level gas cooler 2, flue gas input channel, flue gas pretreatment system, secondary smoke cooler 5, desulfurizing tower 6, flue demister
7th, flue gas condenser 8, chimney demister 9, chimney 10 and steam air heater 11；The heat release side entrance of air preheater 1 inputs with flue gas
Pipeline is connected, and the heat release side outlet of air preheater 1 is successively through one-level gas cooler 2 and flue gas pretreatment system and two level
The heat release side entrance of gas cooler 5 is connected, and the heat release side outlet of secondary smoke cooler 5 is through desulfurizing tower 6 and flue demisting
Device 7 is connected with the smoke inlet of flue gas condenser 8, and the exhanst gas outlet of flue gas condenser 8 is through chimney demister 9 and the phase of chimney 10
Connection；The air outlet slit of flue gas condenser 8 is connected with the heat absorption side entrance of steam air heater 11, the heat absorption side outlet of steam air heater 11 with
The heat absorption side entrance of air preheater 1 is connected, and the cold side of the heat absorption side outlet and steam air heater 11 of secondary smoke cooler 5 enters
Mouth is connected, and the heat absorption side entrance of secondary smoke cooler 5 is connected with the heat release side outlet of steam air heater 11.
Flue gas pretreatment system includes dry collector 3 and air-introduced machine 4, and one-level gas cooler 2 is successively through dry dust removal
Device 3 and air-introduced machine 4 are connected with the heat release side entrance of secondary smoke cooler 5；The air outlet slit of flue gas condenser 8 is through pressure fan
13 are connected with the heat absorption side entrance of steam air heater 11；One-level demister, flue demister 7 and chimney demisting are provided with desulfurizing tower 6
Device 9 is arranged in the exhaust pass of desulfurizing tower 6.
Flue gas condenser 8 includes flue 15, bellows 16 and some heat exchanger tubes 14, outlet and the flue 15 of flue demister 7
One end be connected, the other end of flue 15 is connected with chimney demister 9, and one end of each heat exchanger tube 14 is connected with bellows 16
Logical, the other end of each heat exchanger tube 14 passes through and is fixed on the side of flue 15, and bellows 16 are connected with pressure fan 13.
The three-dimensional rib plate pipe of the equal wing for inside and outside of heat exchanger tube 14；Secondary smoke cooler 5 is teflon heat exchanger.
The utility model also includes condensate input channel and condensate output channel, wherein, condensate input channel with
The heat absorption side entrance of one-level gas cooler 2 is connected, the heat absorption side outlet of condensate output channel and one-level gas cooler 2
It is connected.
The utility model also includes water treatment system, the discharge outlet of the bottom of flue demister 7, the bottom of flue gas condenser 8
Discharge outlet and the discharge outlet of the bottom of chimney demister 9 are connected after being confluxed by drainpipe with the entrance of water treatment system.
Specific work process of the present utility model is：
Flue gas enters in one-level gas cooler 2 through air preheater 1, so as to which flue-gas temperature is reduced into 90 DEG C or so,
The heat of flue gas release is used for heat-setting water, so as to reduce unit coal consumption, the fly ash resistivity and exhaust gas volumn of flue gas after cooling
Reduce, so as to improve the efficiency of dust collection of dry collector 3, the flue gas after cooling enters secondary smoke cooler 5 through air-introduced machine 4
In, it is cooled to 70 DEG C or so by secondary smoke cooler 5, the heat that secondary smoke cooler 5 absorbs is used for heating
Air in steam air heater 11, and then improve the running environment of air preheater 1, reduce unit coal consumption and operating cost.Two level cigarette
Gas Cooler 5 export flue gas enter desulfurizing tower 6 in, flue gas after the desulfurization of desulfurizing tower 6 again successively through the demisting of flue demister 7,
Flue gas condenser 8 cool down after and the demisting of chimney demister 9, then discharged again through chimney 10, wherein, in flue gas condenser 8, room
Outer air is entered in flue gas condenser 8, is then exchanged heat with the flue gas in flue gas condenser 8, flue-gas temperature is declined 5 DEG C
Left and right, so as to condense the moisture in flue gas, alleviate the phenomenon of chimney 10 " emitting white cigarette " and " chimney rain ", the air after heat absorption is through sending
Blower fan 13 is entered in steam air heater 11, and is entered after being absorbed heat in steam air heater 11 in air preheater 1 and continued to absorb heat, Ran Houzai
Discharged in the form of hot blast.
The recirculated water of the heat absorbing side of secondary smoke cooler 5 output is entered in the cold side of steam air heater 11 through booster pump 12 to be put
Heat, then enter back into secondary smoke cooler 5 and absorb heat.
The condensed water uniform effluent of the flushing water of flue demister 7, the flushing water of chimney demister 9 and flue gas condenser 8
After being handled to water treatment system, then the supplement industry water and unit other equipment water as desulphurization system, drop significantly
The water consumption of low power plant.
Technology path described in this patent can be applied in combination, and can also be used alone, depending on the actual conditions of unit operation
Depending on.
Claims (9)
1. a kind of energy-saving and water-saving system for wet desulfurization system, it is characterised in that including one-level gas cooler (2), cigarette
Gas input channel, flue gas pretreatment system, secondary smoke cooler (5), desulfurizing tower (6), flue demister (7), flue gas condensing
Device (8), chimney demister (9), chimney (10) and steam air heater (11)；
The heat release side entrance of air preheater (1) is connected with flue gas input channel, the heat release side outlet of air preheater (1) according to
It is secondary to be connected through one-level gas cooler (2) and flue gas pretreatment system with the heat release side entrance of secondary smoke cooler (5), two
Flue gas of the heat release side outlet through desulfurizing tower (6) and flue demister (7) and flue gas condenser (8) of level gas cooler (5) enters
Mouth is connected, and the exhanst gas outlet of flue gas condenser (8) is connected through chimney demister (9) with chimney (10)；
The air outlet slit of flue gas condenser (8) is connected with the heat absorption side entrance of steam air heater (11), the heat absorbing side of steam air heater (11)
Outlet is connected with the heat absorption side entrance of air preheater (1), the heat absorption side outlet and steam air heater of secondary smoke cooler (5)
(11) heat release side entrance is connected, the heat absorption side entrance of secondary smoke cooler (5) and the heat release side outlet of steam air heater (11)
It is connected.
2. the energy-saving and water-saving system according to claim 1 for wet desulfurization system, it is characterised in that flue gas pre-processes
System includes dry collector (3) and air-introduced machine (4), and one-level gas cooler (2) is successively through dry collector (3) and air-introduced machine
(4) the heat release side entrance with secondary smoke cooler (5) is connected.
3. the energy-saving and water-saving system according to claim 1 for wet desulfurization system, it is characterised in that flue gas condenser
(8) air outlet slit is connected through pressure fan (13) with the heat absorption side entrance of steam air heater (11).
4. the energy-saving and water-saving system according to claim 1 for wet desulfurization system, it is characterised in that desulfurizing tower (6)
Interior to be provided with one-level demister, flue demister (7) and chimney demister (9) are arranged in the exhaust pass of desulfurizing tower (6).
5. the energy-saving and water-saving system according to claim 3 for wet desulfurization system, it is characterised in that flue gas condenser
(8) flue (15), bellows (16) and some heat exchanger tubes (14), the outlet of flue demister (7) and one end of flue (15) are included
It is connected, the other end of flue (15) is connected with chimney demister (9), and one end of each heat exchanger tube (14) is connected with bellows (16)
Logical, the other end of each heat exchanger tube (14) passes through and is fixed on the side of flue (15), and bellows (16) are connected with pressure fan (13).
6. the energy-saving and water-saving system according to claim 5 for wet desulfurization system, it is characterised in that heat exchanger tube (14)
For the three-dimensional rib plate pipe of inside and outside wing.
7. the energy-saving and water-saving system according to claim 1 for wet desulfurization system, it is characterised in that secondary smoke is cold
But device (5) is teflon heat exchanger.
8. the energy-saving and water-saving system according to claim 1 for wet desulfurization system, it is characterised in that also include condensing
Water inlet pipe road and condensate output channel, wherein, the heat absorption side entrance of condensate input channel and one-level gas cooler (2)
It is connected, condensate output channel is connected with the heat absorption side outlet of one-level gas cooler (2).
9. the energy-saving and water-saving system according to claim 1 for wet desulfurization system, it is characterised in that at also including water
Reason system, the discharge outlet of flue demister (7) bottom, the discharge outlet of flue gas condenser (8) bottom and chimney demister (9) bottom
Discharge outlet confluxed by drainpipe after be connected with the entrance of water treatment system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720449342.0U CN206771402U (en) | 2017-04-26 | 2017-04-26 | A kind of energy-saving and water-saving system for wet desulfurization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720449342.0U CN206771402U (en) | 2017-04-26 | 2017-04-26 | A kind of energy-saving and water-saving system for wet desulfurization system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979530A (en) * | 2017-04-26 | 2017-07-25 | 西安西热锅炉环保工程有限公司 | A kind of energy-saving and water-saving system for wet desulfurization system |
| CN108426263A (en) * | 2018-03-28 | 2018-08-21 | 清华大学 | Coal-fired flue-gas processing system |
| CN109059563A (en) * | 2018-06-11 | 2018-12-21 | 孙海霞 | A kind of snakelike tube bank waste-heat recovery device |
| CN109059562A (en) * | 2018-06-11 | 2018-12-21 | 孙海霞 | Snakelike tube bank and heat exchange cover waste-heat recovery device |
| CN109114582A (en) * | 2018-08-28 | 2019-01-01 | 北京华通兴远供热节能技术有限公司 | Gas fired-boiler fume afterheat, which is utilized, removes system and method with white haze |
-
2017
- 2017-04-26 CN CN201720449342.0U patent/CN206771402U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979530A (en) * | 2017-04-26 | 2017-07-25 | 西安西热锅炉环保工程有限公司 | A kind of energy-saving and water-saving system for wet desulfurization system |
| CN108426263A (en) * | 2018-03-28 | 2018-08-21 | 清华大学 | Coal-fired flue-gas processing system |
| CN108426263B (en) * | 2018-03-28 | 2019-10-18 | 清华大学 | Coal-fired flue-gas processing system |
| CN109059563A (en) * | 2018-06-11 | 2018-12-21 | 孙海霞 | A kind of snakelike tube bank waste-heat recovery device |
| CN109059562A (en) * | 2018-06-11 | 2018-12-21 | 孙海霞 | Snakelike tube bank and heat exchange cover waste-heat recovery device |
| CN109114582A (en) * | 2018-08-28 | 2019-01-01 | 北京华通兴远供热节能技术有限公司 | Gas fired-boiler fume afterheat, which is utilized, removes system and method with white haze |
| CN109114582B (en) * | 2018-08-28 | 2019-07-19 | 北京华通兴远供热节能技术有限公司 | Gas fired-boiler fume afterheat, which is utilized, removes system and method with white haze |
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