CN107327902A - Adapt to the heat exchangers for district heating hydrophobic energy recovery system and method for precision processing process - Google Patents
Adapt to the heat exchangers for district heating hydrophobic energy recovery system and method for precision processing process Download PDFInfo
- Publication number
- CN107327902A CN107327902A CN201710707129.XA CN201710707129A CN107327902A CN 107327902 A CN107327902 A CN 107327902A CN 201710707129 A CN201710707129 A CN 201710707129A CN 107327902 A CN107327902 A CN 107327902A
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- Prior art keywords
- valve
- entrance
- hydrophobic
- heat exchanger
- outlet
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
Abstract
The invention discloses a kind of heat exchangers for district heating hydrophobic energy recovery system and method for adapting to precision processing process, it is related to power plant's heating energy-saving field, the system includes intermediate cylinder, heat exchangers for district heating, heat supply network recirculated water, heat exchanger, condenser, cooling tower, polisher, oxygen-eliminating device, valve and intermediate duct；The heat exchangers for district heating steam inlet is connected with intermediate cylinder；The hydrophobic outlet of heat exchangers for district heating is connected with condenser entrance and a heat exchanger wherein side entrance；The heat exchanger opposite side gateway is connected with oxygen-eliminating device entrance and polisher outlet respectively；The polisher entrance is exported with condenser and a heat exchanger wherein side outlet is connected；The condenser entrance is connected with the hydrophobic outlet of heat exchangers for district heating and a heat exchanger wherein side outlet；The invention also discloses hydrophobic energy recovery method, the problem of polisher can not be directly entered by solving heat exchangers for district heating drain temperature height, the energy dissipation during greatly reducing, and system architecture is simple, invest low, with significant energy saving profit.
Description
Technical field
The present invention relates to cogeneration units heating energy-saving field, and in particular to a kind of heat supply network of adaptation precision processing process adds
Hot device hydrophobic energy recovery system and method, can invest the lower precision processing for realizing that heat exchangers for district heating is hydrophobic of lower, energy consumption
Process.
Background technology
Power Market In China is in hypersaturated state by fast-developing afterloading unit capacity, and generating set is for a long time in portion
Divide under load condition and run.At present, many large- and-medium size cities are caused environmental pollution serious, changed still using coal-burning boiler heating
It is to improve power plant's performance driving economy, substitute the important channel of coal-burning boiler to make pure generating set to implement cogeneration of heat and power.
Cogeneration units are drawn gas by intermediate pressure cylinder lifts heat supply network circulating water temperature, and drain temperature is general after steam condensation exists
120~150 DEG C or so, still containing substantial amounts of heat energy.Condensate itself cleanliness factor is very high, but is due to corrosive pipeline, technique behaviour
The reasons such as work, material from leakage, make it contain micro iron ion, copper ion, Ludox etc., if being directly entered oxygen-eliminating device, long
Boiler feedwater can be contaminated after phase operation, have a strong impact on the safe operation of the equipment such as water-cooling wall, drum, superheater, therefore must
Must be to hydrophobic carry out precision processing.Current power plant often carries out water quality precision processing with ion exchange resin, its low cost, technical perfection degree
Height, but operating temperature is generally below 55 DEG C, and negative resin can degrade after temperature rise, except silicon performance is gradually lowered.Document
Show, temperature in use is increased to 75 DEG C, the time required to strong basicity negative resin highly basic group exchange capacity drops to 50% by 50 DEG C
Be down to by 7.5 years 0.71, when temperature in use is increased to 90 DEG C the time required to be down to 0.12, therefore high temperature is hydrophobic to cool
Enter accurate process equipment afterwards.Can using aerial cooler by high temperature is hydrophobic be cooled to temperature up to standard after import accurate process equipment,
But during can cause a large amount of dissipation of energies, belong to the wasting of resources, the present invention can effectively solve this problem.
Also there is the Patents research directly handled condensed water in high temperature at present.Such as patent CN102295356A, profit
With milipore filter and reverse osmosis membrane as main processing units, 95 DEG C or so of condensed water in high temperature, but market reverse osmosis membrane can be handled
Universal temperature resistant range is 0~45 DEG C, it is impossible to be widely applied.Patent CN102030429A utilizes microfilter and fibers adsorption
Tank is processing unit, and patent CN105271539A is to purify main unit using purpose ceramic-film filter and NACF, but right
Improvement project amount and an initial cost are all very huge for built power plant, are not suitable for carrying out popularization and application in built power plant.
The content of the invention
In view of the above-mentioned problems of the prior art, it is a primary object of the present invention to provide a kind of adaptation precision processing process
Heat exchangers for district heating hydrophobic energy recovery system and method, with invest it is low, simple easily implement the characteristics of, in original Power plant station structure
On, by adding heat exchanger and a small amount of valve pipe completes the hydrophobic cooling of high temperature, precision processing process, and avoid process
In energy dissipation.
The present invention solves above-mentioned technical problem by following technical proposals：
A kind of heat exchangers for district heating hydrophobic energy recovery system for adapting to precision processing process, including the heating of intermediate cylinder 1, heat supply network
Device 3, heat supply network circulating backwater 4, heat supply network periodical feeding 5, heat exchanger 10, condenser 8, cooling tower 22, polisher 15, oxygen-eliminating device
18th, valve and intermediate duct；The steam inlet of heat exchangers for district heating 3 is connected by extraction line 2 with intermediate cylinder 1；It is described
The hydrophobic outlet of heat exchangers for district heating 3 is connected with the entrance of condenser 8 and the high temperature side entrance of heat exchanger 10；The heat exchanger of the heat exchanger 10
Low temperature side outlet 17 and low temperature side entrance are connected with the entrance of oxygen-eliminating device 18 and polisher outlet 16 respectively；The polisher 15
Entrance is connected with the first outlet of condenser 8 and heat exchanger high temperature side outlet 11；The first entrance of condenser 8 and heat exchangers for district heating
The hydrophobic outlet of 3 high temperature is connected with heat exchanger high temperature side outlet 11；The connection cooling tower 22 of condenser second entrance 20 is exported, cooling tower
22 entrances connection condenser second outlet 21；Hydrophobic export of the heat exchangers for district heating 3 sets on the pipeline being connected with the entrance of condenser 8
The first valve 7 is equipped with, hydrophobic export of heat exchangers for district heating 3 is provided with the second valve on the pipeline being connected with the high temperature side entrance of heat exchanger 10
Door 9；The 5th valve 14 is provided with the pipeline that the entrance of polisher 15 is connected with the first outlet of condenser 8；The heat exchange
The 3rd valve 12 is provided with the pipeline that device high temperature side outlet 11 is connected with the entrance of polisher 15, with the first entrance of condenser 8
The 4th valve 13 is provided with the pipeline of connection.
On the basis of existing Power plant station structure and flow, addition heat exchanger 10, valve and connecting line, with reference to operation plan
After slightly controlling, the energy dissipation during the hydrophobic precision processing of high temperature can be realized and greatly reduced.
Solve that high temperature is hydrophobic is directly entered the water pollution issue that oxygen-eliminating device is likely to result in.
The hydrophobic energy recovery method of the hydrophobic energy recovery system, heat supply mode initial start stage, the steaming of intermediate cylinder 1
Vapour enters heat exchangers for district heating 3 by extraction line 2 and heats heat supply network circulating backwater 4, and the heat supply network periodical feeding 5 after temperature rise is delivered to
Secondary thermal substation heat exchange, high temperature hydrophobic 6 enters after condenser 8 is cooled down by the first valve 7 and entered by the 5th valve 14 at essence
Manage equipment 15, the second valve 9, the 4th valve the 13, the 3rd 12 close, after precision processing it is hydrophobic through polisher outlet 16 enter change
The hot low temperature side entrance of device 10, now progressively closes off the first valve 7, is gradually opened the second valve 9 and the 4th valve 13, until last
Completely close the first valve 7, open the second valve 9 and the 4th valve 13 completely, reach after thermal balance, high temperature is hydrophobic to be sequentially passed through
Second valve 9, heat exchanger 10, heat exchanger high temperature side outlet 11, the 4th valve 13, condenser 8, the 5th valve 14, polisher
15th, polisher outlet 16 and heat exchanger low temperature side outlet 17, the 3rd valve 12 is used as the regulation of flow in transient process；To protect
The heat transfer temperature difference in heat exchanger 10 is demonstrate,proved, the hydrophobic condenser 8 that has to enter into of heat exchanger high temperature side outlet 11 is done at further cooling
Reason, then enters back into heat exchanger low temperature side entrance by polisher 15.
The present invention is by adding one from cooling heat exchanger and control valve；Start after heat exchangers for district heating, high temperature is hydrophobic
Enter accurate process equipment after fully entering condenser cooling, when there are low temperature, the outflow of high-quality water in polisher outlet, gradually subtract
The hydrophobic flow of high temperature of condenser is flowed into less, gradually increase flows into the hydrophobic flow of high temperature from cooling heat exchanger, until system reaches
To balance.
In one embodiment of the present of invention：High temperature drain temperature is 120 DEG C, and accurate process equipment operating temperature is 50
DEG C, water temperature reduces by 1 DEG C during precision processing；To ensure effective transmission of the heat from cooling heat exchanger, the side liquid of heat exchanger two
There must be heat transfer temperature difference, design heat exchanger high temperature side fluid inlet and outlet temperature is respectively 120 DEG C and 60 DEG C, and high temperature side liquid goes out
Mouth is connected with condenser, and temperature enters accurate process equipment when being down to 50 DEG C；Heat exchanger low temperature side fluid inlet and outlet temperature is respectively
49 DEG C and 109 DEG C；The fluid heat transferring temperature difference is 11 DEG C in heat exchanger.
In heat exchanger there is system optimization in the fluid heat transferring temperature difference, and energy loss can be reduced but can increase by reducing heat transfer temperature difference
Heat exchanger area, increase heat transfer temperature difference can increase energy loss but can reduce heat exchanger area.
Brief description of the drawings
Fig. 1 is present system schematic diagram.
In figure：
1- middle-pressure steam turbine 2- extraction line 3- heat exchangers for district heatings
4- heat supply network circulating backwater 5- heat supply network periodical feeding 6- high temperature is hydrophobic
7- the first valve 8- condensers the second valves of 9-
The valves of 10- heat exchanger 11- heat exchanger high temperature side outlets 12- the 3rd
The valve 15- polishers of the 4th valve 14- of 13- the 5th
16- polishers export 17- heat exchanger low temperature side outlet 18- oxygen-eliminating devices
19- oxygen-eliminating devices export 20- condenser second entrance 21- condenser second outlets
22- cooling towers.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings
As shown in figure 1, a kind of heat exchangers for district heating hydrophobic energy recovery system for adapting to precision processing process of the present invention, including in
Air cylinder 1, heat exchangers for district heating 3, heat supply network circulating backwater 4, heat supply network periodical feeding 5, heat exchanger 10, condenser 8, cooling tower 22, essence
Processor 15, oxygen-eliminating device 18, valve and intermediate duct；The steam inlet of heat exchangers for district heating 3 passes through extraction line 2 and middle pressure
Cylinder 1 is connected；The hydrophobic outlet of heat exchangers for district heating 3 is connected with the entrance of condenser 8 and the high temperature side entrance of heat exchanger 10；It is described to change
The heat exchanger low temperature side outlet 17 of hot device 10 and low temperature side entrance are connected with the entrance of oxygen-eliminating device 18 and polisher outlet 16 respectively；
The entrance of polisher 15 is connected with the first outlet of condenser 8 and heat exchanger high temperature side outlet 11；The condenser 8 first enters
Mouth is connected with the hydrophobic outlet of the high temperature of heat exchangers for district heating 3 and heat exchanger high temperature side outlet 11；The connection cooling of condenser second entrance 20
Tower 22 is exported, the entrance of cooling tower 22 connection condenser second outlet 21；The hydrophobic outlet of heat exchangers for district heating 3 enters with condenser 8
The first valve 7 is provided with the pipeline of mouth connection, heat exchangers for district heating 3 is hydrophobic to export the pipe being connected with the high temperature side entrance of heat exchanger 10
The second valve 9 is provided with road；The 5th is provided with the pipeline that the entrance of polisher 15 is connected with the first outlet of condenser 8
Valve 14；The 3rd valve 12 is provided with the pipeline that the heat exchanger high temperature side outlet 11 is connected with the entrance of polisher 15, with
The 4th valve 13 is provided with the pipeline of the first entrance of condenser 8 connection..
Heat supply mode initial start stage, the steam of intermediate cylinder 1 enters heat exchangers for district heating 3 by extraction line 2 and heats heat supply network
Recirculated water backwater 4, the heat supply network recirculated water 5 after temperature rise delivers to secondary thermal substation heat exchange, and high temperature hydrophobic 6 passes through the first valve 7
Enter accurate process equipment 15 by the 5th valve 14 after being cooled down into condenser 8, the second valve 9, the 4th valve the 13, the 3rd 12 are closed
Close, it is hydrophobic through the entrance heat exchanger 10 low temperature side entrance of polisher outlet 16 after precision processing, now progressively close off the first valve
7, the second valve 9 and the 4th valve 13 are gradually opened, until last completely close the first valve 7, open the and of the second valve 9 completely
4th valve 13, reaches after thermal balance, and high temperature is hydrophobic to sequentially pass through the second valve 9, heat exchanger 10, heat exchanger high temperature side outlet
11st, the 4th valve 13, condenser 8, the 5th valve 14, polisher 15, polisher outlet 16 and heat exchanger low temperature side outlet
17, the 3rd valve 12 is used as the regulation of flow in transient process.To ensure the heat transfer temperature difference in heat exchanger 10, heat exchanger high temperature side
The hydrophobic condenser 8 that has to enter into of outlet 11 does further cooling processing, and it is low then to enter back into heat exchanger by polisher 15
Warm side entrance.
Although above in conjunction with accompanying drawing, invention has been described, and the invention is not limited in above-mentioned specific embodiment party
Formula, above-mentioned embodiment is only schematical, rather than restricted, and one of ordinary skill in the art is in this hair
Under bright enlightenment, without deviating from the spirit of the invention, many variations can also be made, these belong to the guarantor of the present invention
Within shield.All changes for carrying out unsubstantiality to the present invention using this design, all should belong to the row for invading the scope of the present invention
For.
Claims (4)
1. a kind of heat exchangers for district heating hydrophobic energy recovery system for adapting to precision processing process, it is characterised in that：Including intermediate cylinder
(1), heat exchangers for district heating (3), heat supply network circulating backwater (4), heat supply network periodical feeding (5), heat exchanger (10), condenser (8), cooling tower
(22), polisher (15), oxygen-eliminating device (18), valve and intermediate duct；Heat exchangers for district heating (3) steam inlet is by taking out
Steam pipe road (2) is connected with intermediate cylinder (1)；The hydrophobic outlet of heat exchangers for district heating (3) and condenser (8) entrance and heat exchanger
(10) high temperature side entrance is connected；The heat exchanger low temperature side outlet (17) of the heat exchanger (10) and low temperature side entrance respectively with deoxygenation
Device (18) entrance is connected with polisher outlet (16)；Polisher (15) entrance and condenser (8) first outlet and change
Hot device high temperature side outlet (11) is connected；Condenser (8) first entrance and heat exchangers for district heating (3) hydrophobic outlet of high temperature and heat exchange
Device high temperature side outlet (11) is connected；Condenser second entrance (20) connection cooling tower (22) outlet, the connection of cooling tower (22) entrance
Hydrophobic export of condenser second outlet (21) heat exchangers for district heating (3) is provided with the pipeline being connected with condenser (8) entrance
First valve (7), hydrophobic export of heat exchangers for district heating (3) is provided with second on the pipeline being connected with heat exchanger (10) high temperature side entrance
Valve (9)；The 5th valve is provided with the pipeline that polisher (15) entrance is connected with condenser (8) first outlet
(14)；The 3rd valve is provided with the pipeline that the heat exchanger high temperature side outlet (11) is connected with polisher (15) entrance
(12) the 4th valve (13) is provided with the pipeline, being connected with condenser (8) first entrance.
2. hydrophobic energy recovery system according to claim 1, it is characterised in that：In existing Power plant station structure and the basis of flow
On, addition heat exchanger (10), valve and connecting line after operation reserve control, can be realized at the hydrophobic essence of high temperature
Energy dissipation during managing and greatly reducing.
3. hydrophobic energy recovery system according to claim 1, it is characterised in that：Solve that high temperature is hydrophobic is directly entered oxygen-eliminating device
The water pollution issue being likely to result in.
4. the hydrophobic energy recovery method of hydrophobic energy recovery system described in claim 1, it is characterised in that：Heat supply mode starts
Initial stage, the steam of intermediate cylinder (1) enters heat exchangers for district heating (3) by extraction line (2) and heats heat supply network circulating backwater (4), temperature
Heat supply network periodical feeding (5) after degree rise delivers to secondary thermal substation heat exchange, and high temperature hydrophobic (6) enters solidifying by the first valve (7)
Enter polisher (15), the second valve (9), the 4th valve (13), the 3rd by the 5th valve (14) after vapour device (8) cooling
(12) close, after precision processing it is hydrophobic through polisher export (16) enter heat exchanger (10) low temperature side entrance, now gradually close
Close the first valve (7), be gradually opened the second valve (9) and the 4th valve (13), until it is last completely close the first valve (7),
The second valve (9) and the 4th valve 13 are opened completely), reach after thermal balance, high temperature is hydrophobic to be sequentially passed through the second valve (9), changes
Hot device (10), heat exchanger high temperature side outlet (11), the 4th valve (13), condenser (8), the 5th valve (14), polisher
(15), polisher outlet (16) and heat exchanger low temperature side outlet (17), the 3rd valve (12) are used as flow in transient process
Regulation；To ensure the heat transfer temperature difference in heat exchanger (10), the hydrophobic of heat exchanger high temperature side outlet (11) has to enter into condenser (8)
Further cooling processing is done, then heat exchanger low temperature side entrance is entered back into by polisher (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707129.XA CN107327902B (en) | 2017-08-17 | 2017-08-17 | Heat supply network heater drainage energy recovery system and method suitable for fine treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707129.XA CN107327902B (en) | 2017-08-17 | 2017-08-17 | Heat supply network heater drainage energy recovery system and method suitable for fine treatment process |
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| CN107327902A true CN107327902A (en) | 2017-11-07 |
| CN107327902B CN107327902B (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710707129.XA Active CN107327902B (en) | 2017-08-17 | 2017-08-17 | Heat supply network heater drainage energy recovery system and method suitable for fine treatment process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799816A (en) * | 2018-06-06 | 2018-11-13 | 常州宏大智能装备产业发展研究院有限公司 | The trapping method of the automatically controlled steam trap connection of steam-heating apparatus |
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| JP2005337214A (en) * | 2004-05-31 | 2005-12-08 | Hitachi Ltd | Heavy oil reforming gas turbine power generation system using high temperature/high pressure water |
| CN201748408U (en) * | 2010-05-26 | 2011-02-16 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Supercritical heat supply network heater full-backheating drain water system in concurrent boiler thermal power plant |
| CN205480939U (en) * | 2016-04-06 | 2016-08-17 | 华北电力科学研究院(西安)有限公司 | Hydrophobic recovery system of overcritical heat supply unit heat supply network |
| US20160370122A1 (en) * | 2014-02-28 | 2016-12-22 | Tsinghua University | Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof |
| CN207317066U (en) * | 2017-08-17 | 2018-05-04 | 西安西热节能技术有限公司 | Adapt to the heat exchangers for district heating hydrophobic energy recovery system of precision processing process |
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2017
- 2017-08-17 CN CN201710707129.XA patent/CN107327902B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005337214A (en) * | 2004-05-31 | 2005-12-08 | Hitachi Ltd | Heavy oil reforming gas turbine power generation system using high temperature/high pressure water |
| CN201748408U (en) * | 2010-05-26 | 2011-02-16 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Supercritical heat supply network heater full-backheating drain water system in concurrent boiler thermal power plant |
| US20160370122A1 (en) * | 2014-02-28 | 2016-12-22 | Tsinghua University | Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof |
| CN205480939U (en) * | 2016-04-06 | 2016-08-17 | 华北电力科学研究院(西安)有限公司 | Hydrophobic recovery system of overcritical heat supply unit heat supply network |
| CN207317066U (en) * | 2017-08-17 | 2018-05-04 | 西安西热节能技术有限公司 | Adapt to the heat exchangers for district heating hydrophobic energy recovery system of precision processing process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799816A (en) * | 2018-06-06 | 2018-11-13 | 常州宏大智能装备产业发展研究院有限公司 | The trapping method of the automatically controlled steam trap connection of steam-heating apparatus |
| CN108799816B (en) * | 2018-06-06 | 2021-06-11 | 常州宏大智能装备产业发展研究院有限公司 | Drainage method of electric control drainage device of steam heating equipment |
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| CN107327902B (en) | 2023-04-28 |
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