CN103836610A - Heat supply network water drainage heating system capable of improving economical efficiency of heat supply unit - Google Patents
Heat supply network water drainage heating system capable of improving economical efficiency of heat supply unit Download PDFInfo
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- CN103836610A CN103836610A CN201410078218.9A CN201410078218A CN103836610A CN 103836610 A CN103836610 A CN 103836610A CN 201410078218 A CN201410078218 A CN 201410078218A CN 103836610 A CN103836610 A CN 103836610A
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Abstract
The invention relates to a heat supply network water drainage heating system capable of improving economical efficiency of a heat supply unit, aiming to solve the problem about absence of a water drainage heating system which has remarkable effects of energy conservation and emission reduction at present. The heat supply network water drainage heating system comprises a heat supply network heater, a water drainage pump, a primary low-pressure heater, a secondary low-pressure heater, a primary turbine steam extraction pipe and a primary condensed water inlet pipe, and is characterized by further comprising a water drainage heater, a heat supply network water return branch pipe, a heat supply network water supply branch pipe, a water drainage inlet pipe, a water drainage outlet pipe, a water drainage heater bypass, a water drainage pipe, a water drainage pipe valve and a bypass valve. two ends of the water drainage inlet pipe are respectively connected to the heat supply network heater and the water drainage heater, two ends of the water drainage outlet pipe are respectively connected with the water drainage heater and the primary condensed water inlet pipe, the bypass valve is mounted on the water drainage heater bypass, and two ends of the heat supply network water supply branch pipe are respectively connected to the water drainage heater and the heat supply network water supply manifold. The heat supply network water drainage heating system is reasonable in structural design, and remarkable in energy conservation and emission reduction effects.
Description
Technical field
The present invention relates to the hydrophobic heating system of a kind of heat supply network, especially relate to a kind of hydrophobic heating system of heat supply network that improves heat supply unit economy, belong to steam power plant's extraction for heat supply system field, can be widely used in steam power plant's heat supply network heating system, be particularly useful for the steam power plant of lower, the larger central heating system of heat supply network return water temperature.
Background technology
In the last few years, along with national energy-saving reduces discharging the continuous increase of enforcement dynamics, the suffered pressure of power system was also increasing; In addition, along with the development of concentrated supply of heating in the city, the area of heat-supply service that steam power plant receives is increasing, how to improve the output value of specific energy consumption, becomes steam power plant's problem in the urgent need to address.The heat exchangers for district heating of steam power plant's heat supply initial station does not generally all arrange hydrophobic cooling section, design drain temperature is the saturation temperature that extraction pressure is corresponding, and in actual motion because heat supply network return water temperature is very low, generally, between 30 ℃-60 ℃, make hydrophobic existence necessarily excessively cold, and degree of supercooling is along with return water temperature fluctuates, drain temperature is generally 90 ℃ of left and right, drain approach is between 30 ℃-60 ℃, and the heat exchange of the so large temperature difference causes huge irreversible loss, and hydrophobic sensible heat is not fully for external heat supply.
If open day is on 07 24th, 2013, publication number is in the Chinese patent of CN203082865U, a kind of overcritical heating unit heat exchangers for district heating drainage recovering device is disclosed, it comprises at least one heat exchangers for district heating, on the hydrophobic outlet conduit of each heat exchangers for district heating, establish conductivity apparatus and heat exchangers for district heating drainage pump, heat exchangers for district heating drainage pump boosts and is delivered to condensing water conduit through tramp iron separator and enters oxygen-eliminating device, although it can solve overcritical heating unit heat exchangers for district heating drain recovery and heat recovery, improve the performance driving economy of unit, but its complex structure, the cost of the required input of equipment is high.And for example open day is on 01 02nd, 2013, publication number is in the Chinese patent of CN202647719U, a kind of subcritical clammy heat supply unit heat supply network hydrophobic treatment system is disclosed, it comprises condenser, low-pressure heater, heat exchangers for district heating and oxygen-eliminating device, in heat exchangers for district heating, be provided with hydrophobic cooling section, the condensate water of condenser output enters oxygen-eliminating device by condensing water conduit through some groups of low-pressure heaters, in the hydrophobic condensing water conduit before drain water piping is delivered to final stage low-pressure heater generating after heat exchangers for district heating heat exchange from the steam of steam turbine output, economy is remarkable not.
In sum, also do not have at present one can reclaim the hydrophobic sensible heat of heat exchangers for district heating, reduce the irreversible loss in heat transfer process, with relatively low-grade draw gas replace high-grade heating draw gas, reduce the high-grade consumption of drawing gas, increase steam turbine acting ability, improve the thermal efficiency of unit, the obvious hydrophobic heating system of effects of energy saving and emission reduction.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and provide a kind of reasonable in design, can reclaim the hydrophobic sensible heat of heat exchangers for district heating, reduce the irreversible loss in heat transfer process, replace high-grade heating to draw gas with relatively low-grade drawing gas, reduce the high-grade consumption of drawing gas, increase steam turbine acting ability, the thermal efficiency that improves unit, effects of energy saving and emission reduction significantly improves the hydrophobic heating system of heat supply network of heat supply unit economy.
The present invention addresses the above problem adopted technical scheme: the hydrophobic heating system of heat supply network of this raising heat supply unit economy comprises heat exchangers for district heating, drainage pump, low-pressure heater at the corresponding levels, even lower level low-pressure heater, extracted steam from turbine pipe at the corresponding levels, heat supply network return main, heat supply network water main, even lower level extracted steam from turbine pipe, even lower level condensate water inlet pipe and condensate water inlet pipe at the corresponding levels, described heat supply network return main and heat supply network water main are all connected on heat exchangers for district heating, described extracted steam from turbine pipe at the corresponding levels is connected on heat exchangers for district heating and low-pressure heater at the corresponding levels, described even lower level extracted steam from turbine pipe and even lower level condensate water inlet pipe are all connected on even lower level low-pressure heater, the two ends of described condensate water inlet pipe at the corresponding levels are connected on low-pressure heater at the corresponding levels and even lower level low-pressure heater, its design feature is: also comprise hydrophobic heater, heat supply network return branch, heat supply network water supply arm, hydrophobic inlet pipe, hydrophobic go out pipe, hydrophobic heater by-pass, drain pipe, hydrophobic pipe valve and bypass valve, the two ends of described hydrophobic inlet pipe are connected on heat exchangers for district heating and hydrophobic heater, described hydrophobic go out the two ends of pipe be connected on hydrophobic heater and condensate water inlet pipe at the corresponding levels, one end of described hydrophobic heater by-pass be connected to hydrophobic go out on pipe, the other end of this hydrophobic heater by-pass is connected on hydrophobic inlet pipe, described bypass valve is arranged on hydrophobic heater by-pass, the two ends of described heat supply network return branch are connected on hydrophobic heater and heat supply network return main, the two ends of described heat supply network water supply arm are connected on hydrophobic heater and heat supply network water main, one end of described drain pipe be connected to hydrophobic go out on pipe, the other end of this drain pipe is connected on even lower level condensate water inlet pipe, described drainage pump and hydrophobic pipe valve be installed in hydrophobic go out on pipe, one end of described hydrophobic heater by-pass, drainage pump, one end of drain pipe and hydrophobic pipe valve along hydrophobic go out pipe be arranged in order.Make thus of the present invention simple in structurely, reasonable in design, according to cascaded utilization of energy principle, can reclaim the hydrophobic sensible heat of heat exchangers for district heating, reduce the irreversible loss in heat transfer process, can effectively improve the thermal efficiency of unit.
As preferably, the relative altitude position of heat exchangers for district heating of the present invention, hydrophobic heater and drainage pump reduces successively.Make thus the hydrophobic discrepancy in elevation of can utilizing flow automatically in drainage pump.
As preferably, hydrophobic heater of the present invention is plate type heat exchanger or shell-and-tube heat exchanger.
As preferably, the present invention also comprises drain valve, and described drain valve is arranged on drain pipe.
The present invention compared with prior art, have the following advantages and effect: hydrophobic heater reclaims the hydrophobic sensible heat of heat exchangers for district heating and heats low temperature heat supply network backwater, recycle more low-grade extracted steam from turbine and add thermal drain, thereby reduce high-grade extracted steam from turbine consumption, improve the thermal efficiency of unit.Calculating shows, the present invention is to reception 5,000,000 m
2the 300MW grade extraction for heat supply unit of heating area, the Heating Season gross coal consumption rate about 1g/kWh that declines, effects of energy saving and emission reduction is obvious.
Accompanying drawing explanation
Fig. 1 is the structural representation that improves the hydrophobic heating system of heat supply network of heat supply unit economy in the embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment.
Referring to Fig. 1, the hydrophobic heating system of heat supply network that improves heat supply unit economy in the present embodiment comprises heat exchangers for district heating 1, drainage pump 2, low-pressure heater 3 at the corresponding levels, even lower level low-pressure heater 4, hydrophobic heater 5, extracted steam from turbine pipe 6 at the corresponding levels, heat supply network return main 7, heat supply network water main 8, heat supply network return branch 9, heat supply network water supply arm 10, hydrophobic inlet pipe 11, hydrophobic go out pipe 12, hydrophobic heater by-pass 13, drain pipe 14, even lower level extracted steam from turbine pipe 15, even lower level condensate water inlet pipe 16, condensate water inlet pipe 17 at the corresponding levels, hydrophobic pipe valve 18, bypass valve 19 and drain valve 20, wherein, the pattern of hydrophobic heater 5 is not limit, heater 5 as hydrophobic in this can be the patterns such as plate type heat exchanger or shell-and-tube heat exchanger.
Heat supply network return main 7 in the present embodiment and heat supply network water main 8 are all connected on heat exchangers for district heating 1, extracted steam from turbine pipe 6 at the corresponding levels is connected on heat exchangers for district heating 1 and low-pressure heater at the corresponding levels 3, even lower level extracted steam from turbine pipe 15 and even lower level condensate water inlet pipe 16 are all connected on even lower level low-pressure heater 4, and the two ends of condensate water inlet pipe 17 at the corresponding levels are connected on low-pressure heater 3 at the corresponding levels and even lower level low-pressure heater 4.
In the present embodiment, the two ends of hydrophobic inlet pipe 11 are connected on heat exchangers for district heating 1 and hydrophobic heater 5, hydrophobic go out pipe 12 two ends be connected on hydrophobic heater 5 and condensate water inlet pipe 17 at the corresponding levels, one end of hydrophobic heater by-pass 13 be connected to hydrophobic go out pipe 12 on, the other end of this hydrophobic heater by-pass 13 is connected on hydrophobic inlet pipe 11, and bypass valve 19 is arranged on hydrophobic heater by-pass 13.
The two ends of the heat supply network return branch 9 in the present embodiment are connected on hydrophobic heater 5 and heat supply network return main 7, the two ends of heat supply network water supply arm 10 are connected on hydrophobic heater 5 and heat supply network water main 8, one end of drain pipe 14 be connected to hydrophobic go out pipe 12 on, the other end of this drain pipe 14 is connected on even lower level condensate water inlet pipe 16, and drain valve 20 is arranged on drain pipe 14.
In the present embodiment, improve the hydrophobic heating system of heat supply network of heat supply unit economy according to cascaded utilization of energy principle, can reclaim the hydrophobic sensible heat of heat exchangers for district heating 1, reduce the irreversible loss of heat transfer process, with relatively low-grade draw gas replace high-grade heating draw gas, reduce the high-grade consumption of drawing gas, increase steam turbine acting ability, improve the thermal efficiency of unit, effects of energy saving and emission reduction is obvious.Between the hydrophobic outlet of heat exchangers for district heating 1 and hydrophobic 2 pumps, a set of hydrophobic heater 5 is set, the hydrophobic heating part heat supply network backwater that is used for.Drain pipe 14 is set on the entrance pipe of hydrophobic time low-pressure heater 3 at the corresponding levels to even lower level low-pressure heater 4 entrances, the pipeline of hydrophobic time low-pressure heater 3 at the corresponding levels is as for subsequent use.
Heat exchangers for district heating 1 hydrophobic is introduced into hydrophobic heater 5, heats a part of heat supply network backwater, under the constant prerequisite of the external heating load of steam power plant, can obviously reduce the heating consumption of drawing gas; Through the hydrophobic steam turbine even lower level low-pressure heater 4 of sending back to after drainage pump 2 boosts after heat exchange cooling, utilize the even lower level first heat temperature raising that draws gas, then enter low-pressure heater 3 at the corresponding levels and carry out heat temperature raising.By the way, realized cascaded utilization of energy, i.e. the steam of the high-quality multiple electricity that draws gas less, the draw gas object of heating of inferior steam, has improved generatine set heat efficiency more.
Hydrophobic the heat supply network that improves heat supply unit economy in the present embodiment heating system is applied in certain 300MW grade extraction for heat supply unit heat supply network draining system, 50 ℃ of heat supply network return water temperatures, 86 ℃ of supply water temperatures, hot net water flow 6500t/h, five sections of (heating) pressure 0.155MPa.a that draw gas, 95 ℃ of heat exchangers for district heating drain temperatures, when six sections of extraction pressure 0.061MPa.a, after calculating, obtain following data: drain temperature can drop to 55 ℃, six sections of consumptions of drawing gas increase about 16t/h, five sections of consumptions of drawing gas reduce about 15t/h, the water pump wasted work that deduction increases, Heating Season gross coal consumption rate decline 1g/kWh, Heating Season can be saved 900 tons of standard coals, there is significant energy-saving and emission-reduction benefit.
In addition, it should be noted that, the specific embodiment described in this description, shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this description is only to structure example of the present invention explanation.All equivalence variation or simple change of doing according to described structure, feature and the principle of patent design of the present invention, are included in the protection domain of patent of the present invention.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, all should belong to protection scope of the present invention.
Claims (4)
1. one kind is improved the hydrophobic heating system of heat supply network of heat supply unit economy, comprise heat exchangers for district heating, drainage pump, low-pressure heater at the corresponding levels, even lower level low-pressure heater, extracted steam from turbine pipe at the corresponding levels, heat supply network return main, heat supply network water main, even lower level extracted steam from turbine pipe, even lower level condensate water inlet pipe and condensate water inlet pipe at the corresponding levels, described heat supply network return main and heat supply network water main are all connected on heat exchangers for district heating, described extracted steam from turbine pipe at the corresponding levels is connected on heat exchangers for district heating and low-pressure heater at the corresponding levels, described even lower level extracted steam from turbine pipe and even lower level condensate water inlet pipe are all connected on even lower level low-pressure heater, the two ends of described condensate water inlet pipe at the corresponding levels are connected on low-pressure heater at the corresponding levels and even lower level low-pressure heater, it is characterized in that: also comprise hydrophobic heater, heat supply network return branch, heat supply network water supply arm, hydrophobic inlet pipe, hydrophobic go out pipe, hydrophobic heater by-pass, drain pipe, hydrophobic pipe valve and bypass valve, the two ends of described hydrophobic inlet pipe are connected on heat exchangers for district heating and hydrophobic heater, described hydrophobic go out the two ends of pipe be connected on hydrophobic heater and condensate water inlet pipe at the corresponding levels, one end of described hydrophobic heater by-pass be connected to hydrophobic go out on pipe, the other end of this hydrophobic heater by-pass is connected on hydrophobic inlet pipe, described bypass valve is arranged on hydrophobic heater by-pass, the two ends of described heat supply network return branch are connected on hydrophobic heater and heat supply network return main, the two ends of described heat supply network water supply arm are connected on hydrophobic heater and heat supply network water main, one end of described drain pipe be connected to hydrophobic go out on pipe, the other end of this drain pipe is connected on even lower level condensate water inlet pipe, described drainage pump and hydrophobic pipe valve be installed in hydrophobic go out on pipe, one end of described hydrophobic heater by-pass, drainage pump, one end of drain pipe and hydrophobic pipe valve along hydrophobic go out pipe be arranged in order.
2. the hydrophobic heating system of heat supply network of raising heat supply unit economy according to claim 1, is characterized in that: the relative altitude position of described heat exchangers for district heating, hydrophobic heater and drainage pump reduces successively.
3. the hydrophobic heating system of heat supply network of raising heat supply unit economy according to claim 1, is characterized in that: described hydrophobic heater is plate type heat exchanger or shell-and-tube heat exchanger.
4. the hydrophobic heating system of heat supply network of raising heat supply unit economy according to claim 1, is characterized in that: also comprise drain valve, described drain valve is arranged on drain pipe.
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| CN201410078218.9A CN103836610B (en) | 2014-03-05 | 2014-03-05 | A kind of hydrophobic heating system of heat supply network improving thermal power plant unit economy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389275A (en) * | 2017-08-04 | 2017-11-24 | 大唐东北电力试验研究所有限公司 | Heat exchangers for district heating leakage detection system and method |
| CN114674585A (en) * | 2022-03-23 | 2022-06-28 | 华电电力科学研究院有限公司 | Heating capacity measuring method, device and system |
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| CN114674585A (en) * | 2022-03-23 | 2022-06-28 | 华电电力科学研究院有限公司 | Heating capacity measuring method, device and system |
| CN114674585B (en) * | 2022-03-23 | 2024-01-12 | 华电电力科学研究院有限公司 | Heat supply capacity measuring method, device and system |
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| CN103836610B (en) | 2015-12-09 |
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Address after: Hangzhou City, Zhejiang Province, 310030 Xihu District science and Technology Park of West Lake Park Road, No. 10 Patentee after: Huadian Power Science Research Institute Co., Ltd. Address before: Hangzhou City, Zhejiang Province, 310030 Xihu District science and Technology Park of West Lake Park Road, No. 10 Patentee before: China Huadian Electric Research Institute |
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