CN204084323U - A kind of power plant stack gas bootstrap system - Google Patents
A kind of power plant stack gas bootstrap system Download PDFInfo
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- CN204084323U CN204084323U CN201420257250.9U CN201420257250U CN204084323U CN 204084323 U CN204084323 U CN 204084323U CN 201420257250 U CN201420257250 U CN 201420257250U CN 204084323 U CN204084323 U CN 204084323U
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Abstract
The utility model provides a kind of power plant stack gas bootstrap system, comprising: for the low-level (stack-gas) economizer of degree of depth cooled flue gas smoke discharging residual heat; First low-pressure water heater, described first low-pressure water heater is in parallel with described low-pressure coal saver; Second low-pressure water heater of connecting with described first low-pressure water heater, and the first low-pressure water heater and the second low-pressure water heater are fit setting; And in the hydroecium of described first low-pressure water heater, be provided with the water intaking opening be connected with described low-pressure coal saver.Therefore, by being provided with the water intaking opening be connected with described low-pressure coal saver in the hydroecium of low-pressure water heater, low-level (stack-gas) economizer inlet water temperature can be ensured, while guarantee unit hear rate, reducing low-level (stack-gas) economizer heat exchange area, reducing construction costs.
Description
Technical field
The utility model relates to thermal power generating technology field, particularly relates to a kind of power plant stack gas bootstrap system.
Background technology
Along with the progress of society, electric power has become the necessity in people's life.The power source mainly thermal power plant that current China is main, and thermal power plant consumes 50% of coal in China total amount, consume huge coal resources, thus in research thermal power generation process in thermal energy power process in each link energy loss seem quite important.
Realizing in process of the present utility model, inventor finds, heat loss due to exhaust gas is a link maximum in the every thermal loss of station boiler, generally 5% ~ 8%, accounts for 80% or higher of the loss of boiler total amount of heat.
In order to reduce exhaust gas temperature, reduce unit net coal consumption rate, prior art provides a kind of technology utilizing fume afterheat heat-setting water, realizes the object of energy-saving and emission-reduction.Particularly, being exported to electric cleaner gas approach place at boiler air preheater increases with the low-level (stack-gas) economizer of heat exchanger and fit low-pressure water heater and other low-pressure water heaters, and at the porch Ge Qu mono-road water of fit water heater and other water heaters to the heat exchanger of low-level (stack-gas) economizer, heated to the condensate water in heat exchanger by the flue gas of flue, lower the exhaust gas temperature of boiler simultaneously, improve condensing water temperature, thus improve therrmodynamic system cycle efficieny.Low-pressure water heater principle utilizes in steam turbine, did the steam of part merit, is evacuated to heated feed water in water heater, improves the temperature of water, decreases steam turbine and be discharged into quantity of steam in solidifying cooler, reduce thermal loss, improve the cycle efficieny of hot-water heating system.
But inventor is realizing also finding in process of the present utility model, because two low-pressure water heaters are combination types, so introduce a water source, road at the entrance of low-pressure water heater, the rate of air sucked in required of two low-pressure water heaters can be caused like this to be squeezed simultaneously, cause the loss of unit heat, thus affect the exhaust heat utilization effect of whole smoke waste heat utilization system.
Utility model content
In order to solve the technical problem that in prior art, in power plant, smoke waste heat utilization system exhaust heat utilization effect is not good, the utility model provides a kind of power plant stack gas bootstrap system that effectively can utilize fume afterheat.
The utility model provides a kind of power plant stack gas bootstrap system, comprising: the first low-pressure water heater, and described first low-pressure water heater is in parallel with described low-pressure coal saver; Second low-pressure water heater of connecting with described first low-pressure water heater, and the hydroecium zoarium of the first low-pressure water heater and the second low-pressure water heater is set to low pressure hot water room; And the 3rd low-pressure water heater of to connect with described first low-pressure water heater, between described 3rd low-pressure water heater and described first low-pressure water heater, be provided with bypass valve; The water intaking opening that water intake conduit is connected with described low-pressure coal saver is provided with in described low pressure hot water room.
Preferably, above-mentioned water intake conduit is provided with control valve.
Preferably, the quantity of above-mentioned low-pressure coal saver is four.
Preferably, the diameter that above-mentioned low pressure hot water room arranges opening is greater than water intake conduit external diameter.
Preferably, above-mentioned low pressure hot water room arranges between opening with described water intake conduit and adopts electric welding to be connected.
Preferably, stiffener is connected in above-mentioned water intake conduit outer cover.
Preferably, above-mentioned low pressure hot water room arranges opening mode and comprises the carbon plane arc mode of cutting, and carries out the mode of emery wheel or emery wheel after the mode that carbon plane arc is cut.
After adopting technique scheme, because be directly provided with the water intaking opening be connected with described low-pressure coal saver in the hydroecium of low-pressure water heater, so can lose in minimizing unit thermosteresis, ensure low-level (stack-gas) economizer inlet water temperature, reduce low-level (stack-gas) economizer heat exchange area, reduce construction costs.Further, ensure that the rate of air sucked in required of another one in two series connection low-pressure water heaters is not squeezed, reduce unit thermosteresis and lose, substantially increase unit efficiency.Further, low pressure hot water room arranges opening mode and comprises the carbon plane arc mode of cutting, and carries out the mode of emery wheel or emery wheel after the mode that carbon plane arc is cut; The difficult problem in hydroecium opening technology can be solved well.
Accompanying drawing explanation
Fig. 1 is that the utility model embodiment relates to a kind of waste heat of power plant and utilizes system;
Fig. 2 is the sectional view that the utility model embodiment relates to that a kind of power plant surplus energy utilizes system mesolow water heater hydroecium;
Fig. 3 is the partial schematic diagram that the utility model embodiment relates to that a kind of power plant surplus energy utilizes system mesolow water heater hydroecium.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail, it should be noted that, these specific descriptions just allow those of ordinary skill in the art be more prone to, clearly understand the utility model, but not to limited explanation of the present utility model.
As shown in Figure 1, the utility model embodiment preferably, provides a kind of power plant stack gas bootstrap system, comprising: for the low-level (stack-gas) economizer 1 of degree of depth cooled flue gas smoke discharging residual heat; First low-pressure water heater 7 in parallel with described low-pressure coal saver 1; Second low-pressure water heater 8 of connecting with described first low-pressure water heater 7, and the hydroecium zoarium of the first low-pressure water heater 7 and the second low-pressure water heater 8 is set to low pressure hot water room; And the 3rd low-pressure water heater 6 of to connect with the first low-pressure water heater 7, between described 3rd low-pressure water heater 6 and the first low-pressure water heater 7, be provided with bypass valve; The water intaking opening 75 that water intake conduit 73 is connected with described low-pressure coal saver is provided with in described low pressure hot water room.Preferably, the hydroecium zoarium of described first water heater 7 and the second water heater 8 is set to low pressure hot water room 70, the structure of described low pressure hot water room 70 as shown in Figure 2 and Figure 3, along the direction of arrow shown in Fig. 2, the flow direction of water is first through the low entrance 72 that adds, then through tube sheet 77, water delivery mother pipe, U-shaped pipe (not shown), then to the second water heater 8; Again through a water cavity 76 of low pressure hot water room; Flow to tube sheet 77 again, water delivery mother pipe, U-shaped pipe (not shown) to the first water heater 7; Eventually pass the first water heater to flow to and lowly add outlet 71; Namely the low pressure hot water room of the zoarium composition of the first water heater 7 and the second water heater 8 is fit setting, and centre dividing plate separates.And fetching water in low pressure hot water room 70 upper shed that the present embodiment provides, just can avoid introducing a water source, road at the entrance of low-pressure water heater in prior art, the rate of air sucked in required of two low-pressure water heaters can be caused so simultaneously to be squeezed, cause the loss of unit heat; And only need the thermal loss through a water heater, the steam of part merit will be done in steam turbine, be evacuated to heated feed water in two low-pressure water heaters; Reduce low-level (stack-gas) economizer heat exchange area, reduce construction costs, and the rate of air sucked in required of another one is not squeezed, reduce unit thermosteresis and lose, substantially increase unit efficiency.
In the present embodiment, the quantity of low-pressure coal saver is four, is respectively the first low-pressure coal saver 1, second low-pressure coal saver 2, the 3rd low-pressure coal saver 3, the 4th low-pressure coal saver 4, each other together.
Preferably, power plant stack gas bootstrap system also comprises the 3rd low-pressure water heater 6 that first low-pressure water heater 7, second low-pressure water heater 8 of connecting with above-mentioned two is connected.More specifically, the medium of the first low-pressure coal saver 1, second low-pressure coal saver 2, the 3rd low-pressure coal saver 3, the 4th low-pressure coal saver 4 draws from condensate system, takes the low mode adding heat regenerative system and low-level (stack-gas) economizer parallel connection; The medium of smoke waste heat utilization system adds outlet from low-pressure water heater 8 low and low-pressure water heater 7 is low adds outlet and respectively get partial coagulation water and mix, and the flue gas heat-exchange unit heating entering low-level (stack-gas) economizer afterwards backwater adds import to the low of low-pressure water heater 6; And low-pressure water heater 8 low adds outlet arranges control valve 9, the low outlet water intaking pipeline that adds of low-pressure water heater 7 arranges electric gate valve 10, during operation, electric gate valve is often opened, by low-pressure water heater 8 low add outlet regulating valve to ensure into low-level (stack-gas) economizer temperature be 70 DEG C; In low the adding of low-pressure water heater 7, bypass valve 5 is set between low-pressure water heater 6, is used for regulating the flow into low-level (stack-gas) economizer, ensure more than cigarette temperature drop to 100 DEG C.
As described in Fig. 2, Fig. 3, the present embodiment preferably, the diameter that described low pressure hot water room 70 arranges water intaking opening is greater than water intake conduit external diameter, and the diameter of perforate of fetching water≤water intake conduit external diameter+4mm, described low pressure hot water room arranges opening mode and comprises the carbon plane arc mode of cutting, and carries out the mode of emery wheel or emery wheel after the mode that carbon plane arc is cut.And described low pressure hot water room arranges water intaking opening adopts electric welding to be connected with between described water intake conduit.Preferably, stiffener 74 is connected in described water intake conduit outer cover.Described low pressure hot water room 70 also arranges and adds outlet 71 by low for the low-pressure water heater 7 of hot water discharge in low pressure hot water room 70 respectively, and the low of the low-pressure water heater 8 be connected with low-pressure water heater adds entrance 72.
In the detailed process of low pressure hot water room 70 split shed be: 1, scratch hole site line (position of opening is as Fig. 2) with it at hydroecium cylinder 70, opening diameter≤institute water intake conduit external diameter+4mm; Along position of opening line, adopt carbon plane arc incision hydroecium stack shell to carry out perforate 75, distance stack shell inwall is about 1.5mm place and stops carbon plane, is not cut through by stack shell.2, adopt grinder buffing spectacle groove, adopt dust scrubber cleaning dust while grinder buffing, groove position needs reconditioning smooth, must not be jagged.3, stiffening plate is inserted in adapter (water intake conduit external diameter) 73.4, adapter and hydroecium stack shell are put to take and put and weld, adapter and stack shell inside fillet welds appropriate, and outside fillet (weld) adopts carbon to dig back chipping and emery wheel reconditioning, then is welded by outside fillet (weld) appropriate.5, adopt emery wheel reconditioning to remove stiffening plate and take-over point weld seam, stiffening plate and adapter and hydroecium stack shell are put and takes, and weld appropriate.
After adopting technique scheme, because be directly provided with the water intaking opening be connected with described low-pressure coal saver in the hydroecium of low-pressure water heater, so can lose in minimizing unit thermosteresis, ensure low-level (stack-gas) economizer inlet water temperature, reduce low-level (stack-gas) economizer heat exchange area, reduce construction costs.Further, ensure that the rate of air sucked in required of another one in two series connection low-pressure water heaters is not squeezed, reduce unit thermosteresis and lose, substantially increase unit efficiency.Further, low pressure hot water room arranges opening mode and comprises the carbon plane arc mode of cutting, and carries out the mode of emery wheel or emery wheel after the mode that carbon plane arc is cut; The difficult problem in hydroecium opening technology can be solved well.
Finally it should be noted that, above-mentioned explanation is only most preferred embodiment of the present utility model, not does any pro forma restriction to the utility model.Any those of ordinary skill in the art; do not departing within the scope of technical solutions of the utility model; the way of above-mentioned announcement and technology contents all can be utilized to make many possible variations and simple replacement etc. to technical solutions of the utility model, and these all belong to the scope of technical solutions of the utility model protection.
Claims (7)
1. a power plant stack gas bootstrap system, is characterized in that, comprising: for the low-level (stack-gas) economizer of degree of depth cooled flue gas smoke discharging residual heat; First low-pressure water heater, described first low-pressure water heater is in parallel with described low-pressure coal saver; Second low-pressure water heater of connecting with described first low-pressure water heater, and the hydroecium zoarium of the first low-pressure water heater and the second low-pressure water heater is set to low pressure hot water room; And the 3rd low-pressure water heater of to connect with described first low-pressure water heater, between described 3rd low-pressure water heater and described first low-pressure water heater, be provided with bypass valve; The water intaking opening that water intake conduit is connected with described low-pressure coal saver is provided with in described low pressure hot water room.
2. power plant stack gas bootstrap system as claimed in claim 1, is characterized in that, described water intake conduit is provided with control valve.
3. power plant stack gas bootstrap system as claimed in claim 1, it is characterized in that, the quantity of described low-pressure coal saver is four.
4. power plant stack gas bootstrap system as claimed in claim 1, it is characterized in that, the diameter that described low pressure hot water room arranges opening is greater than water intake conduit external diameter.
5. power plant stack gas bootstrap system as claimed in claim 4, it is characterized in that, described low pressure hot water room arranges between opening with described water intake conduit and adopts electric welding to be connected.
6. power plant stack gas bootstrap system as claimed in claim 5, is characterized in that, be connected to stiffener in described water intake conduit outer cover.
7. the power plant stack gas bootstrap system as described in claim 1 or 4 or 5, is characterized in that, described low pressure hot water room arranges opening mode and comprises the carbon plane arc mode of cutting, and carries out the mode of emery wheel or emery wheel after the mode that carbon plane arc is cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257250.9U CN204084323U (en) | 2014-05-19 | 2014-05-19 | A kind of power plant stack gas bootstrap system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420257250.9U CN204084323U (en) | 2014-05-19 | 2014-05-19 | A kind of power plant stack gas bootstrap system |
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| CN204084323U true CN204084323U (en) | 2015-01-07 |
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| CN201420257250.9U Expired - Fee Related CN204084323U (en) | 2014-05-19 | 2014-05-19 | A kind of power plant stack gas bootstrap system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518669A (en) * | 2018-06-08 | 2018-09-11 | 江苏双良新能源装备有限公司 | A kind of piping-main scheme thickness gas waste heat source concentrates residual neat recovering system and method |
-
2014
- 2014-05-19 CN CN201420257250.9U patent/CN204084323U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518669A (en) * | 2018-06-08 | 2018-09-11 | 江苏双良新能源装备有限公司 | A kind of piping-main scheme thickness gas waste heat source concentrates residual neat recovering system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20190519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |