CN203249231U - System using water drainage waste heat of heating network heater to heat raw water - Google Patents
System using water drainage waste heat of heating network heater to heat raw water Download PDFInfo
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- CN203249231U CN203249231U CN 201320240639 CN201320240639U CN203249231U CN 203249231 U CN203249231 U CN 203249231U CN 201320240639 CN201320240639 CN 201320240639 CN 201320240639 U CN201320240639 U CN 201320240639U CN 203249231 U CN203249231 U CN 203249231U
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Abstract
The utility model discloses a system using water drainage waste heat of a heating network heater to heat raw water. The system comprises a low-voltage heater system, the heating network heater, a water drainage cooler, a condenser, condensation water precise processing equipment and a sealing header, wherein the heat source water outlet end of the heating network heater is connected with the water inlet end of the water drainage cooer, the water outlet end of the water drainage cooler is connected with the condenser, the water outlet end of the condenser is connected with the water inlet end of the sealing heater, the water outlet end of the sealing heater is connected with the water inlet end of the condensation water precise processing equipment, the water outlet end of the condensation water precise processing equipment is connected with the low-voltage heater system in the system, and a heat exchange device for heating the raw water is positioned in the water drainage cooler. The system uses water drainage waste heat of the heating network heater to heat the raw water, can fully and reasonable recycle water drainage waste heat and effectively saves a lot of available precious steam resources.
Description
Technical field
The utility model relates to supercritical turbine generator group heat exchangers for district heating draining system, is specifically related to the system of the former water of the hydrophobic waste-heat of a kind of heat exchangers for district heating.
Background technology
The heat supply unit needs a large amount of heat supply network heating steam at Heating Period, the hydrophobic amount of heat exchangers for district heating is larger, supercritical unit for cogeneration, feed water quality in order to ensure boiler, heat exchangers for district heating is hydrophobic should directly not get back to oxygen-eliminating device, and should get back to condenser, process through unit for condensate fine desalting in the lump with the condensate water of therrmodynamic system.Because heat exchangers for district heating drain temperature higher (135 ℃～140 ℃) is not suitable for again directly getting back to condenser, therefore, must seek suitable, effective thermal release approach.The hydrophobic residual heat recovery of relevant heat exchangers for district heating has following three kinds of schemes at present:
Scheme one: be with Heating Period at full capacity the time condensate water as the hydrophobic cooling water source of heat exchangers for district heating, yet the heat supply unit needs a large amount of heat supply network heating steam when the Heating Period full load, the hydrophobic amount of heat exchangers for district heating is larger, and cause the unit condensing capacity less, be about heat exchangers for district heating hydrophobic 1/4, therefore Heating Period at full capacity the time condensate water be that to be not enough to cool off the heat exchangers for district heating of getting back to condenser hydrophobic as the hydrophobic cooling water source of heat exchangers for district heating.Although the patent employing is arranged such as the system mode of Fig. 1, heat exchangers for district heating 1 and No. 5 low-pressure heaters use same section and bleed, the hydrophobic condensate water for the outlet of heat-setting crystal treatment facility of heat exchangers for district heating, the condensate water heating is by entering oxygen-eliminating device 2 after the low-pressure heater system 14 in the system, and hydrophobic the entering after condensed water precision treatment device is processed after the release heat enters oxygen-eliminating device 2 after the low-pressure heater system 14 in the system, though can reduce the follow-up low-pressure heater amount of drawing gas, but, because the heatproof of negative resin does not allow to be higher than 55 ℃ in the condensed water precision treatment device, therefore the condensed water precision treatment device water inlet should be controlled and be lower than 55 ℃, obviously, because approximately 70 ℃ of heat supply network return water temperatures, reclaim hydrophobic heat even hydrophobic cooling section is set in heat exchangers for district heating, the enforcement of this scheme also is difficult.
Scheme two: adopt the one-level heat exchange.As shown in Figure 2, set up a plate type heat exchanger 5, heat exchangers for district heating is hydrophobic after the heat exchange, directly to enter condenser with heat supply network recirculated water backwater in plate type heat exchanger 5.This scheme is cooled to 80 ℃ by 150 ℃ with heat supply network is hydrophobic, the heat supply network backwater is risen to 130 ℃ from 70 ℃, and return the heat supply network water return pipeline, with heat supply network backwater mixed heat transfer.The problem of its existence has two, and 1, back pressure of condenser raises.Heat exchangers for district heating hydrophobic after heat exchange temperature can reduce to 80 ℃, heat exchangers for district heating is hydrophobic enter condenser hotwell after, mix with condensate water, can cause the secondary boiling of hot well, produce a large amount of steam, cause that back pressure of condenser raises, reduce the efficient of unit, need to roll up the area of condenser, this scheme steam turbine plant there is no experience, does not guarantee the feasibility of this scheme.2, thermal loss is larger.Heat exchangers for district heating is hydrophobic when entering condenser, and temperature is 80 ℃, and temperature need be cooled to 33 ℃ after mixing with condensate water, increased the recirculated water demand, and residual heat recovery is insufficient, has been recycled heat waste that water is taken away.
Scheme three: adopt the two-stage heat exchange.As shown in Figure 3, increase by 2 plate type heat exchangers 5, with the hydrophobic condensed water precision treatment device entrance that causes of heat supply network.The first order adopts the heat supply network backwater as low-temperature receiver, in first order plate type heat exchanger after the heat exchange, is cooled to 80 ℃ by 150 ℃ with heat supply network is hydrophobic, the heat supply network backwater is risen to 130 ℃ from 70 ℃, and return the heat supply network water return pipeline, with heat supply network backwater mixed heat transfer; Then heat exchangers for district heating after the cooling is hydrophobic enters second level heat exchange, recirculated water is made low-temperature receiver, in the plate type heat exchanger of the second level after the heat exchange, continuation is cooled to 50 ℃ by 80 ℃ with heat supply network is hydrophobic, then enter after the condensate pump outlet and before the precision processing device of condensation water, this heat exchange rises to 38 ℃ with recirculated water from 22 ℃, because waste heat exchanges to recirculated water, therefore also there is the waste heat loss.
Therefore, the current problem that needs to solve is that the hydrophobic waste heat of heat exchangers for district heating is all fully reclaimed, and reaches the purpose of energy-saving and emission-reduction.
The utility model content
The purpose of this utility model provides the former water system of the hydrophobic waste-heat of a kind of heat exchangers for district heating.This system not only sufficiently and reasonably reclaims hydrophobic waste heat by utilizing the former water of the hydrophobic waste-heat of heat exchangers for district heating, and has effectively saved a large amount of available valuable steam resources.
The utility model provides the system of the former water of the hydrophobic waste-heat of a kind of heat exchangers for district heating, and described system comprises:
The low-pressure heater system;
Heat exchangers for district heating;
Condenser;
Condensed water precision treatment device, the water side of described condensed water precision treatment device links to each other with the water inlet pipe of low-pressure heater system;
Gland heater, the water inlet end of described gland heater links to each other with the water side of described condenser, and the water side of described gland heater links to each other with the water inlet end of described condensed water precision treatment device;
Drain cooler, the water inlet end of described drain cooler links to each other with described heat exchangers for district heating thermal source water side, and the water side of described drain cooler links to each other with the water inlet end of described condenser; And
Be used for adding the heat-exchanger rig of pyrogen water, described heat-exchanger rig is arranged in the described drain cooler, and the water side of heat-exchanger rig links to each other with the water inlet end of described condenser,
The hydrophobic low-pressure heater system heating that enters behind condenser, gland heater, condensed water precision treatment device after the heat exchange, heated former water as a supplement water enters condenser.
In another preference, described system also comprises former water pretreatment equipment, the water inlet end of described former water pretreatment equipment and described heat-exchanger rig with link to each other.
In another preference, described system also comprises condensate pump, and the water inlet end of described condensate pump is connected with the water side of described condenser, and the water side of described condensate pump is connected with the water inlet end of described gland heater.
In another preference, described system also comprises drainage pump, and the water inlet end of described drainage pump is connected with described heat exchangers for district heating thermal source water side, and the water side of described drainage pump is connected with the water inlet end of described drain cooler.
In another preference, described system also comprises the pre-desalter of counter-infiltration and ion-exchange unit, the water inlet end of the pre-desalter of described counter-infiltration is connected with the water side of described heat-exchanger rig, the water side of the pre-desalter of described counter-infiltration is connected with the water inlet end of described ion-exchange unit, and the water side of described ion-exchange unit is connected with the water inlet end of described condenser.
In another preference, the water side of described drain cooler also links to each other with the water inlet end of described condensed water precision treatment device.
In another preference, be provided with the hydrophobic cooling section for hydrophobic cooling in the described heat exchangers for district heating.
In another preference, described hydrophobic cooling section is the hydrophobic heat exchange cooling device with some heat exchange pipelines.
In should be understood that in the utility model scope, above-mentioned each technical characterictic of the present utility model and can making up mutually between specifically described each technical characterictic in below (eg embodiment), thus consist of new or preferred technical scheme.As space is limited, this tired stating no longer one by one.
Description of drawings
Fig. 1 is the System Implementation figure of the full backheat draining system of present overcritical steam power plant heat exchangers for district heating.
Fig. 2 is a kind of embodiment of the system of the former water of the present hydrophobic waste-heat of overcritical steam power plant heat exchangers for district heating.
Fig. 3 is the another kind of embodiment of the system of the former water of the present hydrophobic waste-heat of overcritical steam power plant heat exchangers for district heating.
Fig. 4 is the system of systems schematic diagram of the former water of the hydrophobic waste-heat of the utility model heat exchangers for district heating.
The specific embodiment
The inventor has developed the system of the former water of the hydrophobic waste-heat of a kind of heat exchangers for district heating through extensively and in depth research.By utilizing the hydrophobic waste-heat of heat exchangers for district heating originally need to consume the former water of a large amount of steam, not only sufficiently and reasonably reclaim hydrophobic waste heat, and effectively saved a large amount of available valuable steam resources.On this basis, finished the utility model.
As used herein, described " heat exchangers for district heating is hydrophobic " refers to the condensed water that condenses and form after the steam release heat, namely in the heater of the supercritical unit Gateway Station in Heating Network of cogeneration, the demineralized water that release heat and water temperature are reduced and thermal source steam are behind surface heat exchanger, demineralized water is heated, water temperature rises to 135 ℃, and condenses into the condensate water of uniform temperature (greater than 135 ℃) after the steam release heat.
The former water system of the hydrophobic waste-heat of heat exchangers for district heating of the present utility model has the following advantages:
1. fully reclaim the whole hydrophobic waste heats of heat exchangers for district heating by drain cooler, and be used for heating and originally need to consume a large amount of steam-heated former water, effectively saved power plant a large amount of, available valuable steam resource.
2. utilize the former water of hydrophobic waste-heat, not only greatly improved the treatment effect of water treatment facilities at different levels, and saved the operation energy consumption of the pre-desalter of follow-up counter-infiltration.
3. heat exchangers for district heating can produce with the intensification demand former water of low-temperature receiver simultaneously for the thermal source of residual heat recovery is hydrophobic, and presents positive ratio characteristic, and is not only easy to implement, and can reach the purpose of energy-saving and emission-reduction.
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only are used for explanation the utility model and are not used in the scope of the present utility model that limits.The experimental technique of unreceipted actual conditions in the following example is usually according to normal condition or the condition of advising according to manufacturer.
Embodiment
The system of the former water of the hydrophobic waste-heat of heat exchangers for district heating of the present utility model as shown in Figure 4, heat exchangers for district heating 1 links to each other through the water inlet end of drainage pump 12 with drain cooler 5', the water side of drain cooler 5' links to each other with condenser 3, the water side of condenser 3 links to each other through the water inlet end of condensate pump 13 with gland heater 7, the water side of gland heater 7 links to each other with the water inlet end of condensed water precision treatment device 6, and the water side of condensed water precision treatment device 6 links to each other with low-temperature heater system 14 in the system.
Heat exchangers for district heating 1 is interior to arrange hydrophobic cooling section 4, and hydrophobic cooling section 4 is the hydrophobic heat exchange cooling devices with some heat exchange pipelines, carries out heat exchange with intrasystem heat supply network recirculated water.The drain approach of hydrophobic cooling section 4 is about 10-15 ℃, for example: after about 145 ℃ the hydrophobic cooling section heat exchange of hydrophobic process that forms in the heat exchangers for district heating, temperature is down to 130-135 ℃, the setting of this hydrophobic cooling section can reduce drain temperature, reduce the heat exchange amount of heat exchangers for district heating drain cooler, except can reducing the cooler heat exchange area, can also reduce condensing water temperature after the heat exchange, efficient to steam turbine increases, under identical heating amount condition, reduced the quantity of steam that heating is drawn gas simultaneously.
Through temperature after 4 coolings of hydrophobic cooling section after 130-135 ℃ hydrophobic boosted by drainage pump 12, enter drain cooler 5', former water heat exchange by being arranged on the heat-exchanger rig 8 in the drain cooler and processing through pre-processing device 9 in drain cooler 5', hydrophobic temperature after the heat exchange (20-25 ℃) just in time reaches the water temperature requirement of condenser 3 moisturizings, this part hydrophobic and exhaust steam are mixed into condenser, through condensate pump 13, enter condensed water precision treatment device 6 to purify water through shaft seal heater 7 again, enter the low-pressure heater system heating from condensed water precision treatment device 6 condensate water out.
When the unit amount of makeup water hour, during hydrophobic UTILIZATION OF VESIDUAL HEAT IN insufficient (drain temperature is less than 55 ℃), then hydrophobic can directly entering in the condensed water precision treatment device 6 processed, treated hydrophobic after heat exchange heats up retrieval system.
The former water that heat exchange heats up enters condenser 3 as the desalination supplementing water after the pre-desalter 10 of counter-infiltration and ion-exchange unit 11 processing.Because the hydrophobic waste heat of heat exchangers for district heating supplies 15-20 ℃ intensification just in time for former water extraction, has not only effectively improved the inflow temperature of the pre-desalter 10 of counter-infiltration, and has greatly saved the operation energy consumption of reverse osmosis membrane.
When the heat supply network heating load descends, because the steam demand amount reduces, the then corresponding minimizing of former water demand, 5 sections quantity of steams of heat exchangers for district heating are also few, the hydrophobic corresponding also minimizing of heat exchangers for district heating, the hydrophobic water temperature of the heat exchangers for district heating after the release heat still is fit to get back to condenser 3; When drain cooler two media heat imbalance, cause the drain temperature of its outlet in the time of 35-55 ℃, also can make and hydrophobicly get back to condensed water precision treatment device through the shaft seal heater, so that heat exchangers for district heating is hydrophobic all through condensed water precision treatment device 6 after-purification water quality, guaranteed the feed water quality of boiler.
Maximum under the heat condition at heat supply network, the cogeneration unit approximately needs former water 1000t/h, winter former coolant-temperature gage in the time of 0-5 ℃, the hydrophobic approximately 150t/h of heat exchangers for district heating, approximately 140 ℃ of temperature, the hydrophobic waste heat of heat exchangers for district heating just in time gives former water extraction for 15-20 ℃ temperature rise.And to summer, former water water temperature higher (approximately 25 ℃) does not need heating, at this moment, heat exchangers for district heating is also just in time stopped transport, heat supplies, needs both to reach very perfectly identical, and heat exchangers for district heating can produce with the intensification demand former water of low-temperature receiver simultaneously for the thermal source of residual heat recovery is hydrophobic, and is easy to implement.In addition, the former water for heating 1000t/h approximately needs approximately 40t/h of auxiliary steam total amount, day in winter nearly 1000 tons of steam saving, save effectively that power plant is a large amount of, available valuable steam resource, reach the purpose of energy-saving and emission-reduction.
All quote in this application as a reference at all documents that the utility model is mentioned, just as each piece document is quoted separately as a reference.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after having read above-mentioned instruction content of the present utility model, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (8)
1. the system of the former water of the hydrophobic waste-heat of heat exchangers for district heating is characterized in that, described system comprises:
The low-pressure heater system;
Heat exchangers for district heating;
Condenser;
Condensed water precision treatment device, the water side of described condensed water precision treatment device links to each other with the water inlet pipe of low-pressure heater system;
Gland heater, the water inlet end of described gland heater links to each other with the water side of described condenser, and the water side of described gland heater links to each other with the water inlet end of described condensed water precision treatment device;
Drain cooler, the water inlet end of described drain cooler links to each other with described heat exchangers for district heating thermal source water side, and the water side of described drain cooler links to each other with the water inlet end of described condenser; And
Be used for adding the heat-exchanger rig of pyrogen water, described heat-exchanger rig is arranged in the described drain cooler, and the water side of heat-exchanger rig links to each other with the water inlet end of described condenser,
The hydrophobic low-pressure heater system heating that enters behind condenser, gland heater, condensed water precision treatment device after the heat exchange, heated former water as a supplement water enters condenser.
2. the system as claimed in claim 1 is characterized in that, described system also comprises former water pretreatment equipment, the water inlet end of described former water pretreatment equipment and described heat-exchanger rig with link to each other.
3. the system as claimed in claim 1 is characterized in that, described system also comprises condensate pump, and the water inlet end of described condensate pump is connected with the water side of described condenser, and the water side of described condensate pump is connected with the water inlet end of described gland heater.
4. the system as claimed in claim 1 is characterized in that, described system also comprises drainage pump, and the water inlet end of described drainage pump is connected with described heat exchangers for district heating thermal source water side, and the water side of described drainage pump is connected with the water inlet end of described drain cooler.
5. the system as claimed in claim 1, it is characterized in that, described system also comprises the pre-desalter of counter-infiltration and ion-exchange unit, the water inlet end of the pre-desalter of described counter-infiltration is connected with the water side of described heat-exchanger rig, the water side of the pre-desalter of described counter-infiltration is connected with the water inlet end of described ion-exchange unit, and the water side of described ion-exchange unit is connected with the water inlet end of described condenser.
6. the system as claimed in claim 1 is characterized in that, the water side of described drain cooler also links to each other with the water inlet end of described condensed water precision treatment device.
7. the system as claimed in claim 1 is characterized in that, is provided with the hydrophobic cooling section for hydrophobic cooling in the described heat exchangers for district heating.
8. system as claimed in claim 7 is characterized in that, described hydrophobic cooling section is the hydrophobic heat exchange cooling device with some heat exchange pipelines.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320240639 CN203249231U (en) | 2013-05-06 | 2013-05-06 | System using water drainage waste heat of heating network heater to heat raw water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320240639 CN203249231U (en) | 2013-05-06 | 2013-05-06 | System using water drainage waste heat of heating network heater to heat raw water |
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Cited By (7)
| 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 |
| CN106338208A (en) * | 2016-08-19 | 2017-01-18 | 华能北京热电有限责任公司 | Heat supply network drain recovery system and method |
| CN109305737A (en) * | 2018-09-03 | 2019-02-05 | 清华大学 | A kind of desulfurization water zero discharge and high-purity sodium chloride extracting method based on thermal method |
| CN109520001A (en) * | 2018-12-12 | 2019-03-26 | 沧州华润热电有限公司 | A kind of heat supply network draining system |
| CN110864343A (en) * | 2019-12-13 | 2020-03-06 | 华能国际电力股份有限公司 | Low-pressure cylinder zero-output heat supply system of circulating fluidized bed unit |
| CN111780195A (en) * | 2020-05-18 | 2020-10-16 | 华电电力科学研究院有限公司 | Supercritical unit improved heat supply network drainage system and working method thereof |
| CN111792687A (en) * | 2020-07-07 | 2020-10-20 | 西安热工研究院有限公司 | Heat supply network drainage waste heat recovery device and method for thermal power plant based on seawater desalination technology |
-
2013
- 2013-05-06 CN CN 201320240639 patent/CN203249231U/en not_active Expired - Lifetime
Cited By (10)
| 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 |
| CN106338208A (en) * | 2016-08-19 | 2017-01-18 | 华能北京热电有限责任公司 | Heat supply network drain recovery system and method |
| CN109305737A (en) * | 2018-09-03 | 2019-02-05 | 清华大学 | A kind of desulfurization water zero discharge and high-purity sodium chloride extracting method based on thermal method |
| CN109520001A (en) * | 2018-12-12 | 2019-03-26 | 沧州华润热电有限公司 | A kind of heat supply network draining system |
| CN110864343A (en) * | 2019-12-13 | 2020-03-06 | 华能国际电力股份有限公司 | Low-pressure cylinder zero-output heat supply system of circulating fluidized bed unit |
| CN111780195A (en) * | 2020-05-18 | 2020-10-16 | 华电电力科学研究院有限公司 | Supercritical unit improved heat supply network drainage system and working method thereof |
| CN111780195B (en) * | 2020-05-18 | 2021-09-03 | 华电电力科学研究院有限公司 | Supercritical unit improved heat supply network drainage system and working method thereof |
| CN111792687A (en) * | 2020-07-07 | 2020-10-20 | 西安热工研究院有限公司 | Heat supply network drainage waste heat recovery device and method for thermal power plant based on seawater desalination technology |
| CN111792687B (en) * | 2020-07-07 | 2024-01-19 | 西安热工研究院有限公司 | Heat supply network drainage waste heat recovery device and method for thermal power plant based on sea water desalination technology |
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