CN203848272U - Heating-network dewatering and heating system of heat supply unit - Google Patents
Heating-network dewatering and heating system of heat supply unit Download PDFInfo
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- CN203848272U CN203848272U CN201420097638.7U CN201420097638U CN203848272U CN 203848272 U CN203848272 U CN 203848272U CN 201420097638 U CN201420097638 U CN 201420097638U CN 203848272 U CN203848272 U CN 203848272U
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- hydrophobic
- pipe
- heater
- heat supply
- heating
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 230000002209 hydrophobic effect Effects 0.000 claims description 99
- 238000013461 design Methods 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000009833 condensation Methods 0.000 abstract 2
- 230000005494 condensation Effects 0.000 abstract 2
- 238000004134 energy conservation Methods 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 5
- 230000002427 irreversible effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 206010009866 Cold sweat Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Abstract
The utility model relates to a heating-network dewatering and heating system of a heat supply unit. In the prior art, no dewatering and heating system poor in energy conservation and emission reduction exists. The heating-network dewatering and heating system comprises a heating-network heater, a dewatering pump, an original-level low-pressure heater, a lower-level low-pressure heater, an original-level turbine steam extraction pipe and an original-level condensation water inlet pipe. The heating-network dewatering and heating system is characterized by further comprising a dewatering heater, a heating-network water return branch pipe, a dewatering inlet pipe, a dewatering outlet pipe, a dewatering heater bypass, a dewatering pipe, a dewatering pipe valve and a bypass valve, two ends of the dewatering inlet pipe are respectively connected with the heating-network heater and the dewatering heater, two ends of the dewatering outlet pipe are respectively connected with the dewatering heater and the original-level condensation water inlet pipe, the bypass valve is mounted on the dewatering heater bypass, two ends of the heating-network water return branch pipe are respectively connected with the dewatering heater and a main heating-network water return pipe, and two ends of the heating-network water supply branch pipe are respectively connected with the dewatering heater and the main heating-network water supply pipe. The heating-network dewatering and heating system is reasonable in structural design and remarkable in energy conservation and emission reduction.
Description
Technical field
The utility model relates to the hydrophobic heating system of a kind of heat supply network, especially the hydrophobic heating system of heat supply network that relates to a kind of heat supply unit, 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 through tramp iron separator, is delivered to condensing water conduit 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 that the steam of exporting from steam turbine generates after heat exchangers for district heating heat exchange, economy is remarkable not.
In sum, also do not have at present a kind ofly can reclaim the hydrophobic sensible heat of heat exchangers for district heating, reduce the irreversible loss in heat transfer process, with relatively low-grade drawing gas, replace high-grade heating to 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.
Utility model content
The purpose of this utility model 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, with relatively low-grade drawing gas, replace high-grade heating to draw gas, reduce the high-grade consumption of drawing gas, increase steam turbine acting ability, improve the thermal efficiency of unit, the hydrophobic heating system of heat supply network of the obvious heat supply unit of effects of energy saving and emission reduction.
The technical scheme in the invention for solving the above technical problem is: the hydrophobic heating system of heat supply network of this heat supply unit 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, hydrophobicly 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, the described hydrophobic two ends that go out pipe are connected on hydrophobic heater and condensate water inlet pipe at the corresponding levels, one end of described hydrophobic heater by-pass is connected to and hydrophobicly goes 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 is connected to and hydrophobicly goes 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 are installed in and hydrophobicly go out on pipe, one end of described hydrophobic heater by-pass, drainage pump, one end of drain pipe and hydrophobic pipe valve go out pipe and are arranged in order along hydrophobic.Make thus of the present utility model 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 described in the utility model, 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 described in the utility model is plate type heat exchanger or shell-and-tube heat exchanger.
As preferably, the utility model also comprises drain valve, and described drain valve is arranged on drain pipe.
The utility model 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 utility model 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 of the hydrophobic heating system of heat supply network of heat supply unit in the utility model embodiment.
The specific embodiment
Below in conjunction with accompanying drawing and by embodiment, the utility model is described in further detail, and following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Embodiment.
Referring to Fig. 1, in the present embodiment, the hydrophobic heating system of the heat supply network of heat supply unit 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, hydrophobicly 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, the hydrophobic two ends that go out pipe 12 are connected on hydrophobic heater 5 and condensate water inlet pipe 17 at the corresponding levels, one end of hydrophobic heater by-pass 13 is connected to and hydrophobicly goes out on pipe 12, 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 is connected to and hydrophobicly goes out on pipe 12, 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.
Drainage pump 2 in the present embodiment and hydrophobic pipe valve 18 are installed in and hydrophobicly go out on pipe 12, one end of one end of hydrophobic heater by-pass 13, drainage pump 2, drain pipe 14 and hydrophobic pipe valve 18 go out pipe 12 and are arranged in order along hydrophobic, the relative altitude position of heat exchangers for district heating 1, hydrophobic heater 5 and drainage pump 2 reduces successively, and the hydrophobic discrepancy in elevation of can utilizing is flowed automatically in drainage pump 2.
In the present embodiment, the hydrophobic heating system of the heat supply network of heat supply unit is 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 drawing gas, replace high-grade heating to 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 standby.
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 high-quality steam multiple electricity that draws gas less, the draw gas object of heating of inferior steam, has improved generatine set heat efficiency more.
The hydrophobic heating system of heat supply network of heat supply unit in the present embodiment 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, during 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, the shape of its parts and components, institute's title of being named etc. can be different, and the above content described in this description is only to the explanation of the utility model structure example.All equivalence variation or simple change of doing according to described structure, feature and the principle of the utility model patent design, are included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.
Claims (4)
1. the hydrophobic heating system of the heat supply network of a heat supply unit, 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, hydrophobicly 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, the described hydrophobic two ends that go out pipe are connected on hydrophobic heater and condensate water inlet pipe at the corresponding levels, one end of described hydrophobic heater by-pass is connected to and hydrophobicly goes 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 is connected to and hydrophobicly goes 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 are installed in and hydrophobicly go out on pipe, one end of described hydrophobic heater by-pass, drainage pump, one end of drain pipe and hydrophobic pipe valve go out pipe and are arranged in order along hydrophobic.
2. the hydrophobic heating system of the heat supply network of heat supply unit 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 the heat supply network of heat supply unit 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 the heat supply network of heat supply unit according to claim 1, is characterized in that: also comprise drain valve, described drain valve is arranged on drain pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420097638.7U CN203848272U (en) | 2014-03-05 | 2014-03-05 | Heating-network dewatering and heating system of heat supply unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420097638.7U CN203848272U (en) | 2014-03-05 | 2014-03-05 | Heating-network dewatering and heating system of heat supply unit |
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| Publication Number | Publication Date |
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| CN203848272U true CN203848272U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420097638.7U Expired - Lifetime CN203848272U (en) | 2014-03-05 | 2014-03-05 | Heating-network dewatering and heating system of heat supply unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836610A (en) * | 2014-03-05 | 2014-06-04 | 华电电力科学研究院 | Heat supply network water drainage heating system capable of improving economical efficiency of heat supply unit |
| CN105570861A (en) * | 2016-02-24 | 2016-05-11 | 华电电力科学研究院 | Energy cascade utilization device and method for extraction steam heating system |
-
2014
- 2014-03-05 CN CN201420097638.7U patent/CN203848272U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836610A (en) * | 2014-03-05 | 2014-06-04 | 华电电力科学研究院 | Heat supply network water drainage heating system capable of improving economical efficiency of heat supply unit |
| CN103836610B (en) * | 2014-03-05 | 2015-12-09 | 华电电力科学研究院 | A kind of hydrophobic heating system of heat supply network improving thermal power plant unit economy |
| CN105570861A (en) * | 2016-02-24 | 2016-05-11 | 华电电力科学研究院 | Energy cascade utilization device and method for extraction steam heating system |
| CN105570861B (en) * | 2016-02-24 | 2017-12-15 | 华电电力科学研究院 | A kind of cascaded utilization of energy apparatus and method for extraction for heat supply system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |