CN106196145B - A kind of large size negative-pressure heating furnace air preheating system and method - Google Patents
A kind of large size negative-pressure heating furnace air preheating system and method Download PDFInfo
- Publication number
- CN106196145B CN106196145B CN201610490716.3A CN201610490716A CN106196145B CN 106196145 B CN106196145 B CN 106196145B CN 201610490716 A CN201610490716 A CN 201610490716A CN 106196145 B CN106196145 B CN 106196145B
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- pipeline
- heating furnace
- lime set
- air
- preheating device
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 50
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 50
- 239000004571 lime Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000011143 downstream manufacturing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007701 flash-distillation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- -1 low-pressure steam Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The present invention relates to a kind of large-scale negative-pressure heating furnace air preheating system and methods, including flash tank, centrifugal pump, temperature reducing system, preheating device and return water system, flash tank is connected with centrifugal pump, temperature reducing system, flow controller, preheating device and return water system successively by pipeline, it is filled with saturation lime set in flash tank, is saturated lime set followed by progress next step utilization is sent after centrifugal pump, temperature reducing system, preheating device and return water system;Preheating device can be arranged multigroup, and multigroup preheating device is connected in parallel on by pipeline between temperature reducing system and return water system.Technical solution effective solution provided by the invention preheating device assignment of traffic problem, the design of attemperator ensure that the stationarity of system operation, the design of enhanced heat exchange measure improve energy-saving efficiency, reduce production cost.
Description
Technical field
The present invention relates to the energy conserving systems that a kind of waste heat using heat medium carries out air preheat, it is intended to improve combustion-supporting sky
Gas charging temperature reduces fuel consumption, save production cost more particularly to a kind of large-scale negative-pressure heating furnace air preheating system and
Method.
Background technology
In industrial each department, there are the waste heats such as a large amount of condensate liquid, low-pressure steam, flue gas all not obtain effectively
Utilization, cause the serious waste of the energy, therefore, developing effective waste-heat recovery device, to be that the energy is able to rationally utilize effective
Mode.
Due to the low-grade property of waste heat and existing generality, it is desirable that residual neat recovering system has the following:It 1, can be
Big heat flow is transmitted under small heat transfer temperature and pressure, heat recovery rate is high;
2, energy conserving system resistance itself is small, does not influence negative pressure stove air inlet;
3, simple in structure, compact, economical;
4, energy conserving system is safeguarded simple, need not additionally increase energy consumption equipment;
5, single furnace heat load is each different in the furnace group of negative pressure stove, the corresponding condensate flow control for matching preheating device
It should be accurate.
6, since pressure drop generates water hammer during lime set is transported over long distances, safety in production requires energy conserving system operation flat
Surely.
There has been no the heating furnace air preheating systems for meeting above-mentioned needs at present, for this purpose, invention is a kind of to meet above-mentioned technology
It is required that large-scale negative-pressure heating furnace air preheater just seem urgent and necessary.
Invention content
Technical problem to be solved by the invention is to provide a kind of waste heats using plant area's condensate liquid to heat combustion air,
Reasonable energy utilization reduces the large-scale negative-pressure heating furnace air preheating system of fuel consumption, it is a further object of the present invention to provide
A method of it is realized using the device and heats combustion air using the waste heat of plant area's condensate liquid.
The technical solution that the present invention solves above-mentioned technical problem is as follows:A kind of large size negative-pressure heating furnace air preheating system,
Including flash tank, centrifugal pump, temperature reducing system, preheating device and return water system, the flash tank by pipeline successively with centrifugal pump,
Temperature reducing system, preheating device are connected with return water system, saturation lime set are filled in the flash tank, the saturation lime set is successively
It is admitted to downstream processing units after flowing through centrifugal pump, temperature reducing system, preheating device and return water system;The preheating device setting is more
Group, multigroup preheating device are connected in parallel on by pipeline between temperature reducing system and return water system.
The beneficial effects of the invention are as follows:Technical solution effective solution provided by the invention preheating device assignment of traffic is asked
Topic;Water hammer of pipeline caused by the design of temperature reducing system avoids lime set flash distillation, ensure that the steady of system operation;Reinforcing is changed
The design of hot measure improves energy-saving efficiency, reduces production cost.
Based on the above technical solution, the present invention can also be improved as follows:
Further, the preheating device includes the flow controller and preheater being cascaded by pipeline, the stream
Amount controller is located at the upstream position of saturation lime set flow direction, and the preheating device is located at the downstream of saturation lime set flow direction
Position.
Further, the temperature reducing system includes attemperator, desuperheating water transfer pipeline, regulating valve, temperature sensor, described to subtract
On the pipeline that warm device is arranged between centrifugal pump and preheating device, the attemperator is circumscribed with desuperheating water, the tune by pipeline
Valve is saved to be mounted on the pipeline of conveying desuperheating water, the pipeline between the attemperator and preheating device is equipped with temperature sensor,
The temperature sensor is connected with regulating valve by circuit.
Further, the preheater is fin-tube heat exchanger or heat-pipe heat exchanger.
Further, the preheater is fin-tube heat exchanger, is led to for being saturated lime set in the fin-tube heat exchanger
The heat exchange pipe external surface crossed is equipped with compound aluminum material fin, and the heat exchanger tube inner homogeneous is equipped with multiple spoilers.
Further, the preheater bottom is rack-mount, is connect with the one end in the first air duct at the top of the preheater
And be connected to, the other end in first air duct is connected by pipeline with heating furnace;Spare wind is installed on first air duct
Mouthful.
Further, the preheater be heat-pipe heat exchanger, the heat-pipe heat exchanger for air by channel
Using fin structure, be used to be saturated lime set by heat pipe use light-pipe structure.
Further, the air side air outlet of the preheater connect and is connected to the one end in the second air duct, second wind
The other end in road is connected by pipeline with heating furnace.
Further, the flash drum overhead is equipped with steam (vapor) outlet, and the steam outlet is equipped with shut-off valve, the flash distillation
Tank top be equipped with for add saturation lime set feed inlet, bottom be equipped with for export be saturated lime set discharge port, it is described go out
One end of pipeline is installed, which is connected with the input port of centrifugal pump outside material mouth.
A kind of large size negative-pressure heating furnace air preheat method, is realized, tool by large-scale negative-pressure heating furnace air preheating system
Steps are as follows for body method:
1) the saturation lime set for generating plant area introduces flash tank, and in flash tank, saturated vapor escapes, the saturation in tank body
Lime set, which is entered by pipeline in centrifugal pump, to be pressurized;
2) saturation lime set after supercharged is obtained in step 1), and progress desuperheat processing in temperature reducing system is entered by pipeline;
3) desuperheat obtained in step 2) treated saturation lime set adjusted by flow controller after enter preheater with
Combustion air carries out heat exchange;
4) the saturation lime set after the heat exchange process obtained in step 3) enters return water system, is finally used as downstream use
On the way;The combustion air for carrying out heat exchange enters in heating furnace.
Advantageous effect using above-mentioned technical proposal is that system uses enhanced heat exchange finned tube, and flow-disturbing is provided in pipe
Piece, heat exchange efficiency is high, takes full advantage of medium waste heat;Lime set is saturated during long-distance sand transport since the loss of pressure can produce
Raw a certain amount of steam, to generate noise, vibrations, air pocket etc. adverse effect.Temperature reducing system passes through temperature feedback control tune
The aperture for saving valve ensure that the temperature of saturation lime set fluctuates in a certain range, avoid generating steam in pipeline, eliminate pipeline
The adverse effect that water attack is brought, to ensure that the stability of lime set system during long-distance sand transport;System is in pre- hot charging
It sets water inlet and devises flow control element, ensure that every preheating device assignment of traffic is reasonable;Whole system does not consume volume
Outer electric energy, it is stable, securely and reliably, safeguard simple.
Description of the drawings
Fig. 1 is the system flow chart of the present invention;
Fig. 2 is preheating device and air channel structure schematic diagram in the first embodiment of the invention;
Fig. 3 is the regions I partial enlarged view in Fig. 2;
Fig. 4 is preheating device and air channel structure schematic diagram in second of embodiment of the invention.
In attached drawing, parts list represented by the reference numerals are as follows:
1, it is saturated lime set, 2, saturated vapor, 3, flash tank, 3-1, feed inlet, 3-2, steam (vapor) outlet, 4, centrifugal pump, 5, subtract
Warm system, 6, flow controller, 7, preheater, 8, attemperator, 9, regulating valve, 10, desuperheating water, 11, return water system, 12, air duct,
13, spare air port, 14, preheating device ontology, 15, holder, 16, compound aluminum material fin, 17, spoiler, the 18, second wind
Road, 19, preheating device shell, 20, heat pipe, 21, temperature sensor;
K represents air-flow direction in figure.
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
As shown in Figures 1 to 4, a kind of large-scale negative-pressure heating furnace air preheating system, including flash tank 3, centrifugal pump 4, desuperheat
System 5, preheating device and return water system 11, the flash tank 3 by pipeline successively with centrifugal pump 4, temperature reducing system 5, pre- hot charging
It sets and is connected with return water system 11, saturation lime set 1 is filled in the flash tank 3, the saturation lime set 1 is followed by centrifugal pump
4, downstream processing units are admitted to after temperature reducing system 5, preheating device and return water system 11.3 top of the flash tank is equipped with steam
3-2 is exported, shut-off valve is installed at the steam (vapor) outlet 3-2.
3 top of the flash tank is equipped with the feed inlet 3-1 for adding saturation lime set, and bottom is equipped with for exporting saturation
The discharge port of lime set 1, the discharge port are equipped with one end of pipeline outside, which is connected with the input port of centrifugal pump 4
It connects.
The preheating device includes the flow controller 6 being cascaded by pipeline and preheater 7, the flow control
Device 6 is located at the upstream position of 1 flow direction of saturation lime set, and the preheater 7 is located at the downstream bits of 1 flow direction of saturation lime set
It sets.
The temperature reducing system 5 includes attemperator 8, desuperheating water 10, regulating valve 9, temperature sensor, and the attemperator 8 is arranged
On pipeline between centrifugal pump 4 and preheating device, the attemperator 8 is circumscribed with desuperheating water 10, the regulating valve 9 by pipeline
On the pipeline of conveying desuperheating water 10, temperature sensor is installed on the pipeline between the attemperator 8 and preheating device
21, the temperature sensor 21 is connected with regulating valve 9 by circuit.
As shown in Figures 2 and 3, the preheater 7 is fin-tube heat exchanger.For satisfying in the fin-tube heat exchanger
With lime set 1 by heat exchange pipe external surface be equipped with compound aluminum material fin 16, the heat exchanger tube inner homogeneous is equipped with and multiple disturbs
Flow 17.
7 bottom of the preheater is mounted on holder 15, and the holder 15 is installed in the plane, 7 top of the preheater
It connect and is connected to the one end in the first air duct 12, the other end in first air duct 12 is connected by pipeline with heating furnace;Institute
It states and spare air port 13 is installed on the first air duct 12.
As shown in figure 4, second embodiment of the present invention with the first embodiment the difference is that, the preheater
7 be heat-pipe heat exchanger.The heat-pipe heat exchanger for air by channel use fin structure, be used to be saturated solidifying
Liquid by heat pipe 20 use light-pipe structure.The air side air outlet of the preheater 7 connect with the one end in the second air duct 18 and
Connection, the other end in second air duct 18 are connected by pipeline with heating furnace;The air side air inlet of the preheater 7 is pacified
Equipped with air blower.The preheating device setting is multigroup, and multigroup preheating device is connected in parallel on temperature reducing system 5 and return water by pipeline
Between system 11.
A kind of large size negative-pressure heating furnace air preheat method, is realized, tool by large-scale negative-pressure heating furnace air preheating system
Steps are as follows for body method:
1) the saturation lime set 1 for generating plant area introduces flash tank 3, and in flash tank 3, saturated vapor 2 escapes, in tank body 3
Saturation lime set 1 entered in centrifugal pump 4 by pipeline and be pressurized;
2) saturation lime set 1 after supercharged is obtained in step 1), and progress desuperheat processing in temperature reducing system 5 is entered by pipeline;
3) desuperheat obtained in step 2) treated saturation lime set 1 by flow controller 6 adjust after enter preheater
Heat exchange is carried out with combustion air;
4) the saturation lime set 1 after the heat exchange process obtained in step 3) enters return water system 11, is finally used as downstream
Purposes;The combustion air for carrying out heat exchange enters in heating furnace.
The operation principle and the course of work of the present invention:Plant area is saturated lime set 1, flash tank 3 is introduced by feed inlet 3-1,
In flash tank 3, saturated vapor 2 is escaped from steam (vapor) outlet 3-2, and the saturation lime set in tank body 3 is pressurized by centrifugal pump 4;Centrifugal pump 4
Saturation lime set after pressurization by 5 desuperheat of temperature reducing system, then is adjusted by flow controller 6 and enters preheater 7;After desuperheat
It is saturated lime set 1 and carries out heat exchange in air preheater 7 with combustion air, combustion air passes through the first air duct 12 after heating
Or second air duct 18 enter heating furnace in;The saturation lime set 1 to be cooled down enters return water system 11, is finally used as other use
On the way.
In conclusion technical solution effective solution provided by the invention preheating device assignment of traffic problem, attemperator
Design ensure that the stationarity of system operation, the design of enhanced heat exchange measure improve energy-saving efficiency, reduce production cost.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of large size negative-pressure heating furnace air preheating system, which is characterized in that including flash tank (3), centrifugal pump (4), desuperheat
System (5), preheating device and return water system (11), the flash tank (3) by pipeline successively with centrifugal pump (4), temperature reducing system
(5), preheating device is connected with return water system (11), and saturation lime set (1) is filled in the flash tank (3), and the saturation is solidifying
Liquid (1) after centrifugal pump (4), temperature reducing system (5), preheating device and return water system (11) followed by being sent into downstream processes
Device;The preheating device setting is multigroup, and multigroup preheating device is connected in parallel on temperature reducing system (5) and return water system by pipeline
(11) between;
The preheating device includes the flow controller (6) being cascaded by pipeline and preheater (7), the flow control
Device (6) is located at the upstream position of saturation lime set (1) flow direction, and the preheater (7) is located at saturation lime set (1) flow direction
Downstream position.
2. a kind of large-scale negative-pressure heating furnace air preheating system according to claim 1, which is characterized in that the temperature reducing system
(5) include attemperator (8), desuperheating water (10), regulating valve (9), temperature sensor (21), the attemperator (8), which is arranged, to be centrifuged
It pumps on the pipeline of (4) between preheating device, the attemperator (8) is circumscribed with desuperheating water (10), the regulating valve by pipeline
(9) it is mounted on the pipeline of conveying desuperheating water (10), pipeline of the attemperator (8) between preheating device is passed equipped with temperature
Sensor (21), the temperature sensor (21) are connected with regulating valve (9) by circuit.
3. a kind of large-scale negative-pressure heating furnace air preheating system according to claim 1, which is characterized in that the preheater
(7) it is fin-tube heat exchanger or heat-pipe heat exchanger.
4. a kind of large-scale negative-pressure heating furnace air preheating system according to claim 3, which is characterized in that the preheater
(7) be fin-tube heat exchanger, in the fin-tube heat exchanger for be saturated lime set (1) by heat exchange pipe external surface be equipped with
Compound aluminum material fin (16), the heat exchanger tube inner homogeneous are equipped with multiple spoilers (17).
5. a kind of large-scale negative-pressure heating furnace air preheating system according to claim 4, which is characterized in that the preheater
(7) bottom is mounted on holder (15), is connect and is connected to the one end of the first air duct (12) at the top of the preheater (7), described
The other end in the first air duct (12) is connected by pipeline with heating furnace;Spare air port is installed on first air duct (12)
(13)。
6. a kind of large-scale negative-pressure heating furnace air preheating system according to claim 3, which is characterized in that the preheater
(7) be heat-pipe heat exchanger, the heat-pipe heat exchanger for air by channel use fin structure, be used to be saturated
Lime set (1) by heat pipe (20) use light-pipe structure.
7. a kind of large-scale negative-pressure heating furnace air preheating system according to claim 6, which is characterized in that the preheater
(7) air side air outlet connect and is connected to the one end of the second air duct (18), and the other end of second air duct (18) passes through
Pipeline is connected with heating furnace.
8. according to a kind of any one of claim 1 to 7 large-scale negative-pressure heating furnace air preheating system, which is characterized in that institute
It states and is equipped with steam (vapor) outlet (3-2) at the top of flash tank (3), shut-off valve, the flash tank are installed at the steam (vapor) outlet (3-2)
(3) top is equipped with the feed inlet (3-1) for adding saturation lime set (1), and side wall is equipped with for exporting going out for saturation lime set (1)
Material mouth, the discharge port are circumscribed with one end of pipeline, which is connected with the input port of centrifugal pump (4).
9. a kind of large size negative-pressure heating furnace air preheat method, which is characterized in that by as described in any one of claim 1 to 8
A kind of large-scale negative-pressure heating furnace air preheating system realize, include the following steps:
1) the saturation lime set (1) for generating plant area introduces flash tank (3), in flash tank (3), saturated vapor (2) effusion, and tank body
Interior saturation lime set (1), which is entered by pipeline in centrifugal pump (4), to be pressurized;
2) the saturation lime set (1) after supercharged obtained in step 1) is entered by pipeline carries out desuperheat processing in temperature reducing system (5);
3) desuperheat obtained in step 2) treated saturation lime set (1) by flow controller (6) adjust after enter preheater
(7) heat exchange is carried out with combustion air;
4) the saturation lime set (1) after the heat exchange process obtained in step 3) enters return water system (11), is finally used as downstream
Purposes;The combustion air for carrying out heat exchange enters in heating furnace.
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CN201610490716.3A CN106196145B (en) | 2016-06-28 | 2016-06-28 | A kind of large size negative-pressure heating furnace air preheating system and method |
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Cited By (1)
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RU2825791C2 (en) * | 2022-05-18 | 2024-08-29 | Бэйцзин Аэроспейс Энерджи Консервейшн Энд Инвайроментал Протекшн Текнолоджи Ко., Лтд | Self-adapting heat recovery and utilization system with zero power consumption for ethylene production device |
Families Citing this family (2)
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CN112665413B (en) * | 2021-01-19 | 2023-08-08 | 北方华锦化学工业股份有限公司 | Raw material preheating system |
CN114993091B (en) * | 2022-05-18 | 2023-05-12 | 北京航化节能环保技术有限公司 | Zero-power consumption self-adaptive distributed waste heat recycling system of ethylene device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS54147530A (en) * | 1978-05-10 | 1979-11-17 | Ishikawajima Harima Heavy Ind Co Ltd | Air preheating temperature controller for combustion of air heating furnaces |
CN2622558Y (en) * | 2003-06-18 | 2004-06-30 | 敖建军 | Heat-exchange system for coal-saving device |
CN102410755B (en) * | 2011-12-16 | 2013-04-17 | 亿恒节能科技江苏有限公司 | Multi-effect flash evaporation system for utilizing condensed water waste heat in air-heating coil group |
CN102445066B (en) * | 2011-12-28 | 2013-08-14 | 亿恒节能科技江苏有限公司 | Natural air dehydrating and preheating drying oven system adopting condensate water waste heat for two-effect flash evaporation |
CN205002149U (en) * | 2015-07-20 | 2016-01-27 | 内蒙古晨宏力化工集团有限责任公司 | System that utilizes is imitated to condensation hydrothermal |
CN205223723U (en) * | 2015-11-18 | 2016-05-11 | 重庆龙璟纸业有限公司 | Condensation water recovery system |
CN105478064A (en) * | 2015-12-29 | 2016-04-13 | 北京华福工程有限公司 | Low-pressure steam condensation water energy saving system and method for alkane dehydrogenation device |
-
2016
- 2016-06-28 CN CN201610490716.3A patent/CN106196145B/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2825791C2 (en) * | 2022-05-18 | 2024-08-29 | Бэйцзин Аэроспейс Энерджи Консервейшн Энд Инвайроментал Протекшн Текнолоджи Ко., Лтд | Self-adapting heat recovery and utilization system with zero power consumption for ethylene production device |
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