CN207962613U - A kind of smoke waste heat utilization system - Google Patents
A kind of smoke waste heat utilization system Download PDFInfo
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- CN207962613U CN207962613U CN201820064284.4U CN201820064284U CN207962613U CN 207962613 U CN207962613 U CN 207962613U CN 201820064284 U CN201820064284 U CN 201820064284U CN 207962613 U CN207962613 U CN 207962613U
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Abstract
The utility model discloses a kind of smoke waste heat utilization system, the system comprises boiler, air preheater, smoke inlet flue, low-level (stack-gas) economizer, condensation water controller, temperature sensor, exhanst gas outlet pipeline, electrostatic precipitator, air-introduced machine, desulfurizing towers, the boiler is connected by flue with air preheater, air preheater is connected by smoke inlet flue with low-level (stack-gas) economizer, the low-level (stack-gas) economizer is connected by exhanst gas outlet pipeline with electrostatic precipitator, and the electrostatic precipitator is sequentially connected by flue and air-introduced machine, desulfurizing tower；It is also equipped with temperature sensor on the low-level (stack-gas) economizer.Tthe utility model system reduces low-level (stack-gas) economizer etching problem, and energy conservation and environmental protection by rational control means.
Description
Technical field
The utility model is related to a kind of smoke waste heat utilization systems, and in particular to a kind of low-level (stack-gas) economizer UTILIZATION OF VESIDUAL HEAT IN system
System, belongs to power plant stack gas field of waste heat utilization.
Background technology
Coal-fired power plant's heat loss due to exhaust gas is big, accounts for 80% of boiler heat loss or more, fully recycles this part heat, Ke Yiti
High generatine set heat efficiency reduces coal consumption.Low-level (stack-gas) economizer extraction section from the low-pressure heater of steam turbine condensate system condenses
Water is sent in low-level (stack-gas) economizer and heats, and is sent to high-pressure heater after heating again.Low-level (stack-gas) economizer becomes flue gas waste heat recovery at present
A kind of mainstream equipment.When low-level (stack-gas) economizer is arranged in before deduster, flue-gas temperature can be reduced in advance to reduce flue gas
Flow, while reducing the specific resistance of flue gas, improve efficiency of dust collection.But during being cooled due to flue gas, it is easy solidifying
Dew contains corrosive substance in condensation ingredient, can corrode to the heat exchange coil of low-level (stack-gas) economizer, this to residual neat recovering system just
Often operation is very unfavorable.Meanwhile after flue gas is cooled, flow is accordingly reduced, and flow velocity can also reduce, if electrostatic precipitator, drawn
Wind turbine, desulfurizing tower then waste electric energy and water according further to heavy-duty service.
Utility model content
To solve the above problems, the utility model provides a kind of smoke waste heat utilization system, using rational control means,
Low-level (stack-gas) economizer etching problem is reduced, the power consumption of deduster, air-introduced machine is reduced, reduces the water consumption of desulfurizing tower.
The specific technical solution of the utility model is as follows：A kind of smoke waste heat utilization system, the system comprises boiler, skies
Air preheater, smoke inlet flue, low-level (stack-gas) economizer, condensation water controller, temperature sensor, exhanst gas outlet pipeline, electrostatic
Deduster, air-introduced machine, desulfurizing tower, the boiler are connected by flue with air preheater, and air preheater is entered by flue gas
Mouth flue is connected with low-level (stack-gas) economizer, and the low-level (stack-gas) economizer is connected by exhanst gas outlet pipeline with electrostatic precipitator, described
Electrostatic precipitator be sequentially connected by flue and air-introduced machine, desulfurizing tower；Temperature biography is also equipped on the low-level (stack-gas) economizer
Sensor.
Further, the condensation water controller includes condensed water inlet duct, condensation water exit conduit, condensed water
Lateral, low-pressure heater, condensation water control valve, condensed water branch outlet pipeline, the condensed water inlet duct with it is low
Heater is pressed to be connected, condensed water lateral is drawn by condensed water inlet duct, and low temperature province is entered by condensing water control valve
Coal device, the condensed water after being heated are connected by condensed water branch outlet pipeline with condensation water exit conduit.
Further, there is spray piping in the desulfurizing tower, spray piping control valve is provided on spray piping.
Further, it is provided with air inducing machine controller on the air-introduced machine.
Further, electrostatic precipitator is equipped with electrostatic precipitator power supply.
Compared with prior art, the beneficial effects of the utility model are：
1) the utility model prevents flue gas condensation by monitoring flue-gas temperature in low-level (stack-gas) economizer, adjusting condensing capacity, from
And prevent low-level (stack-gas) economizer from corroding.
2) the utility model is by monitoring flue-gas temperature in low-level (stack-gas) economizer, adjust electrostatic precipitator power supply, rotation speed of fan,
Lye spray flux in desulfurizing tower, to reduce the consumption of electricity and water.
After using above-mentioned technical proposal, the corrosion of low-level (stack-gas) economizer in the process of running is made to be prevented, while advantageous
In the energy consumption and water consumption of saving equipment component.
Description of the drawings
Fig. 1 is the utility model embodiment schematic diagram；
In figure：1, boiler；2, air preheater；3, smoke inlet flue；4, low-level (stack-gas) economizer；5, condense water inlet water pipe
Road；6, low-pressure heater；7, condense water exit conduit；8, condensed water lateral；9, condense water control valve；10, condense moisture
Branch outlet conduit；11, temperature sensor；12, exhanst gas outlet pipeline；13, electrostatic precipitator；14, electrostatic precipitator power supply；14,
Air-introduced machine；16, air inducing machine controller；17, spray piping control valve；18 desulfurizing towers.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings.
Referring to attached drawing 1, a kind of smoke waste heat utilization system of the utility model, including boiler 1；Air preheater 2；Flue gas
Gas approach 3；Low-level (stack-gas) economizer 4；Condensation water circle device (including condensed water inlet duct 5, low-pressure heater 6, condensed water go out
Mouth pipeline 7, condensed water lateral 8, condensation water control valve 9, condensed water branch outlet pipeline 10)；Temperature sensor 11；Flue gas
Outlet conduit 12；Electrostatic precipitator 13；Electrostatic precipitator power supply 14；Air-introduced machine 15；Air inducing machine controller 16；Spray piping controls
Valve 17；Desulfurizing tower 18.Boiler 1 is connected by flue with air preheater 2, air preheater 2 by smoke inlet flue 3 with it is low
Warm economizer 4 is connected, and low-level (stack-gas) economizer 4 is connected by exhanst gas outlet pipeline 12 with electrostatic precipitator 13, and electrostatic precipitator 13 is logical
Flue is crossed to be sequentially connected with air-introduced machine 15, desulfurizing tower 18.
In use, when the flue gas that be given off from boiler 1 passes through air preheater 2 successively, by smoke inlet flue 3, into
Enter into low-level (stack-gas) economizer 4 and be cooled, then using exhanst gas outlet pipeline 12, enters in electrostatic precipitator 13, by removing
It after dirt, then is entered in desulfurizing tower 18 by air-introduced machine 15, is further taken off by the akaline liquid that spray piping control valve 17 sprays
Sulphur.
As shown in Figure 1, condensed water inlet duct 5 is connected with low-pressure heater 6, condensed water lateral 8 is entered by condensed water
Mouth pipeline 5 is drawn, and low-level (stack-gas) economizer 4 is entered by condensing water control valve 9, and the condensed water after being heated, which passes through, condenses water branch
Outlet conduit 10 is connected with condensation water exit conduit 7.
In use, by condensed water inlet duct 5, the condensed water in low-pressure heater 6 is entered, is partly drained, quilt
The condensed water of drainage enters low-level (stack-gas) economizer 4 by condensed water lateral 8, condensation water control valve 9.It enters low temperature and saves coal
For condensed water in device 4 by flue gas, the condensed water after heating enters condensation water out by condensed water branch outlet pipeline 10
In pipeline 7.
In order to facilitate detection temperature, temperature sensor is also equipped on low-level (stack-gas) economizer.
Temperature in low-level (stack-gas) economizer 4, which is tested, when temperature sensor 11 is more than flue gas acid dew point temperature but less than flue gas design temperature
When spending, illustrate that flue-gas temperature reduction, flow become smaller, specific resistance reduces, and is conducive to electrostatic precipitator dedusting.At this point, electrostatic precipitation
Device power supply 14 reduces frequency or voltage, realizes energy-efficient effect.Meanwhile air inducing machine controller 16 reduces rotation speed of fan, reduces wind
The energy consumption of machine.Since exhaust gas volumn tails off, reduced into the exhaust gas volumn in desulfurizing tower 18, therefore spray piping control valve 17 turns down,
Reduce the consumption of lye.
When temperature is close to flue gas acid dew point temperature in the test low-level (stack-gas) economizer 4 of temperature sensor 11, water control valve 9 is condensed
Automatic turn down is even switched off, and prevents flue gas to be cooled to acid dew point hereinafter, to prevent low-level (stack-gas) economizer 4 to be corroded.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (5)
1. a kind of smoke waste heat utilization system, the system comprises boiler (1), air preheater (2), smoke inlet flue (3),
Low-level (stack-gas) economizer (4), condensation water controller, temperature sensor (11), exhanst gas outlet pipeline (12), electrostatic precipitator (13),
Air-introduced machine (15), desulfurizing tower (18), characterized in that the boiler (1) is connected by flue with air preheater (2), air
Preheater (2) is connected by smoke inlet flue (3) with low-level (stack-gas) economizer (4), and the low-level (stack-gas) economizer (4) is gone out by flue gas
Mouth pipeline (12) is connected with electrostatic precipitator (13), and the electrostatic precipitator (13) passes through flue and air-introduced machine (15), desulfurization
Tower (18) is sequentially connected；It is also equipped with temperature sensor (11) on the low-level (stack-gas) economizer (4).
2. a kind of smoke waste heat utilization system according to claim 1, characterized in that the condensation water controller packet
Include condensed water inlet duct (5), low-pressure heater (6), condensation water exit conduit (7), condensed water lateral (8), condensed water
Control valve (9), condensed water branch outlet pipeline (10), the condensed water inlet duct (5) are connected with low-pressure heater (6),
Condensed water lateral (8) is drawn by condensed water inlet duct (5), and low-level (stack-gas) economizer is entered by condensing water control valve (9)
(4), the condensed water after being heated is connected by condensed water branch outlet pipeline (10) with condensation water exit conduit (7).
3. a kind of smoke waste heat utilization system according to claim 1, characterized in that have spray in the desulfurizing tower (18)
Shower pipe road is provided with spray piping control valve (17) on spray piping.
4. a kind of smoke waste heat utilization system according to claim 1, characterized in that be arranged on the air-introduced machine (15)
There is air inducing machine controller (16).
5. a kind of smoke waste heat utilization system according to claim 1, characterized in that electrostatic precipitator (13) is equipped with quiet
Electric precipitator power supply (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064284.4U CN207962613U (en) | 2018-01-16 | 2018-01-16 | A kind of smoke waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064284.4U CN207962613U (en) | 2018-01-16 | 2018-01-16 | A kind of smoke waste heat utilization system |
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| Publication Number | Publication Date |
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| CN207962613U true CN207962613U (en) | 2018-10-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594775A (en) * | 2019-09-30 | 2019-12-20 | 大唐东营发电有限公司 | Fan unit of thermal power factory |
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2018
- 2018-01-16 CN CN201820064284.4U patent/CN207962613U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594775A (en) * | 2019-09-30 | 2019-12-20 | 大唐东营发电有限公司 | Fan unit of thermal power factory |
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