CN113217894A - System and method for recovering waste heat of steam high-temperature condensate water - Google Patents
System and method for recovering waste heat of steam high-temperature condensate water Download PDFInfo
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- CN113217894A CN113217894A CN202110644493.2A CN202110644493A CN113217894A CN 113217894 A CN113217894 A CN 113217894A CN 202110644493 A CN202110644493 A CN 202110644493A CN 113217894 A CN113217894 A CN 113217894A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/04—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass by drop in pressure of high-pressure hot water within pressure- reducing chambers, e.g. in accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/26—Steam-separating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
- F22B37/46—Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to low or high water level, e.g. for checking, suppressing, extinguishing combustion in boilers
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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
- F24D17/00—Domestic hot-water supply systems
- F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
Abstract
The invention discloses a steam high-temperature condensate water waste heat recovery system and a steam high-temperature condensate water waste heat recovery method. The invention solves the problems of cavitation of the traditional electric conveying pump, damage of the flue gas economizer, unsmooth drainage of upstream equipment, thermal pollution of flash steam and the like, saves energy sources, can realize unbalance of heat using time periods by reusing the heat storage tank, and performs peak and valley elimination.
Description
Technical Field
The invention belongs to the technical field of new energy and energy conservation, and particularly relates to a system and a method for recovering waste heat of steam high-temperature condensate water.
Background
The steam high-temperature condensed water is generally directly pumped to a soft water tank of a boiler room or is directly discharged after being injected into a cooling water tank to be cooled by introducing a cooling pool in the current industry application, the water tank can generate a large amount of flash steam which is not discharged well or can cause energy waste even if the flash steam is discharged, moreover, the boiler room can not use the condensed water with higher temperature and can only be discharged on the spot, and the energy waste is serious.
When the steam high-temperature condensate water is directly pumped to a boiler room soft water tank, the following common problems can be brought: the temperature of the water tank can be very high along with the continuous entering of the high-temperature condensed water into the soft water tank. Therefore, the soft water tank is continuously aerated to pollute the environment of the external space where the soft water tank is located, and the flue gas economizer can be caused to have reduced efficiency due to overhigh cold measurement temperature and even burst due to water vaporization. When condensed water is pumped back to the soft water tank, flash steam needs to be discharged before the pump, so that water accumulation caused by unsmooth drainage of upstream steam utilization equipment is prevented, but the position of the delivery pump is in a basement in many times, and high-temperature flash steam is not allowed to be discharged continuously. The high-temperature condensed water easily causes the electric pump to be corroded by the steam. When the steam high-temperature condensate water is directly discharged after being introduced into the cooling tank for cooling, not only the condensate water and the heat carried by the condensate water are wasted, but also a large amount of cooling water is consumed, and huge waste of heat and water is caused.
In the prior art, the steam condensate water is treated as conventional hot water without starting from the whole steam system, but four links (steam generation, steam conveying, steam use and condensate water recovery) of the steam system are mutually influenced and restricted, and the recovery and utilization of the condensate water are different from the conventional hot water due to the existence of flash steam and the steam-water two-phase flow of the condensate water.
Disclosure of Invention
The invention aims to solve the technical problem of providing a system and a method for recovering waste heat of steam high-temperature condensate water, which aim to solve the defects in the prior art, utilize a proper cold source to absorb the heat of the condensate water, eliminate the unsmooth drainage of upstream equipment and environmental pollution caused by flash steam, reduce the temperature of the condensate water, ensure the safe and efficient operation of a flue gas economizer, eliminate the risk of electric pump cavitation and save energy.
The invention adopts the following technical scheme:
the utility model provides a steam high temperature comdenstion water waste heat recovery system, including the flash tank, the entry end of flash tank is provided with the trap, the exit end of flash tank divides two the tunnel, be connected with low-resistance type catch-and-flow heat exchanger all the way, another way is connected with the boiler room behind the primary side import and the comdenstion water delivery pump of water heat exchanger, the secondary side export of water heat exchanger is connected with the entry end of heat storage tank through low-resistance type catch-and-flow heat exchanger, the exit end of heat storage tank divides two the tunnel, the secondary side exit linkage through circulating water delivery pump and water heat exchanger all the way, another way is connected with life hot water delivery pump, be provided with automatic water replenishing valve on the heat storage tank.
Specifically, a first liquid level sensor is arranged in the flash tank, and the condensate water conveying pump is connected with the first liquid level sensor.
Specifically, the condensate water delivery pump is a variable frequency electric pump.
Specifically, a second liquid level sensor and a temperature sensor are arranged in the heat storage tank, the automatic water replenishing valve is connected with the second liquid level sensor, and the domestic hot water conveying pump is connected with the temperature sensor.
Specifically, the domestic hot water delivery pump is a variable frequency electric pump.
According to the other technical scheme, the method for recovering the waste heat of the steam high-temperature condensed water comprises the following specific steps of:
high-temperature condensate water enters a flash tank through a drain valve to be subjected to steam-water separation; cooling the separated flash steam by a low-resistance steam-water heat exchanger, and then refluxing to a flash tank; the separated liquid condensate water is cooled by a water-water heat exchanger and then is sent to a soft water tank of a boiler room by a condensate water conveying pump; water stored in the heat storage tank enters the water-water heat exchanger and the low-resistance steam-water heat exchanger through the circulating water delivery pump and is used for absorbing heat, and the circulating water delivery pump is in a continuous operation state; when the water temperature rises to a set temperature, the domestic hot water delivery pump is started, water in the heat storage tank is delivered to the domestic hot water tank, when the liquid level is lowered to a lower limit set value, the automatic water replenishing valve is opened to start water replenishing, and when the liquid level rises to an upper limit set value, the water replenishing is stopped.
Specifically, the condensate water delivery pump controls the delivery amount of the condensate water through a first liquid level sensor installed in the flash tank.
Specifically, the set water temperature is 35-45 ℃, the upper liquid level limit is 80%, and the lower liquid level limit is 20%.
Specifically, the domestic hot water delivery pump controls the delivery amount of the domestic hot water through a temperature sensor arranged on the heat storage tank.
Specifically, the automatic water replenishing valve controls the water replenishing amount through a second liquid level sensor on the heat storage tank.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention relates to a steam high-temperature condensate water waste heat recovery system.A flash tank outlet end is divided into two paths, one path is connected with a low-resistance steam-water heat exchanger, the other path is connected with a boiler room after passing through a water-water heat exchanger and a condensate water delivery pump, the water-water heat exchanger is connected with an inlet end of a heat storage tank through the low-resistance steam-water heat exchanger, an outlet end of the heat storage tank is divided into two paths, one path is connected with the water-water heat exchanger through a circulating water delivery pump, the other path is connected with a domestic hot water delivery pump, and an open system can ensure that upstream steam-; no gassing phenomenon exists on site; the quality and heat of the steam condensate can be fully recovered.
Further, the purpose of the flash tank provided with the first liquid level sensor is to prevent the liquid level from fluctuating greatly and influence the working performance and the service life of the condensate water conveying pump.
Furthermore, the electric pump adopts a frequency conversion mode, so that the conveying process is stable, and the risk of vibration and the like caused by sudden starting and stopping of the water pump to the system safety is prevented.
Furthermore, the second liquid level sensor is arranged, so that the situation that the circulating water delivery pump is subjected to cavitation caused by too low liquid level in the hot tank and the hot tank overflows caused by too high liquid level can be prevented; the temperature sensor is arranged to prevent the phenomenon of gas evolution caused by too high temperature of the hot tank, which leads to too high temperature of the water at the secondary side of the heat exchanger.
Furthermore, the electric pump adopts a frequency conversion mode, so that the conveying process is stable, and the risk of vibration and the like caused by sudden starting and stopping of the water pump to the system safety is prevented.
The method for recovering the waste heat of the high-temperature condensate water of the steam comprises three modules of flash separation, steam-water heat exchange and water-water heat exchange. The design is mainly to solve the common problems of unsmooth drainage, gas evolution, over-temperature and the like in the existing recovery method. The basic principle is that a temperature-controllable secondary side cold source (water) is used for absorbing heat of steam condensate water, so that the temperature of the steam condensate water is reduced and the steam condensate water flows back to a boiler room in a liquid state for cyclic utilization. A secondary side cold source (water) for absorbing heat is used for other hot users such as domestic hot water and the like, so that the purposes of energy conservation and emission reduction are achieved.
Further, the purpose of the flash tank provided with the first liquid level sensor is to prevent the liquid level from fluctuating greatly and influence the working performance and the service life of the condensate water conveying pump. The basic principle is that a liquid level sensor is used for generating 4-20mA signals to be transmitted to a controller, and the controller analyzes and judges the signals and then sends the 4-20mA signals to a frequency converter, so that the output flow of a pump is controlled. When the liquid level rises, the pump output flow increases, and when the liquid level decreases, the pump output flow decreases.
Furthermore, a second liquid level sensor is arranged for preventing the circulating water delivery pump from generating cavitation caused by too low liquid level in the hot tank and preventing the hot tank from overflowing caused by too high liquid level; the basic principle is that the liquid level sensor generates 4-20mA signals and transmits the signals to the controller, the controller analyzes and judges the signals and then sends the 4-20mA signals to the water replenishing valve, and the water replenishing amount is controlled to maintain the liquid level to be stable. When the liquid level reaches the lower limit set value of 20%, the water replenishing valve is opened, and when the liquid level reaches the upper limit set value of 80%, the water replenishing valve is closed. The temperature sensor is arranged to prevent the phenomenon of gas evolution caused by too high temperature of the hot tank, which leads to too high temperature of the water at the secondary side of the heat exchanger. The basic principle is that a 4-20mA signal is output by a temperature sensor and is transmitted to a controller, the controller is compared with a set value of 40 ℃, if the temperature is higher than 40 ℃, a domestic hot water delivery pump outputs according to the deviation degree of the temperature, and the closer the temperature is to 40 ℃, the larger the water pump outputs.
Furthermore, a temperature sensor is arranged to accurately control the water temperature in the tank, so that water waste caused by overcooling discharge is prevented, and primary side air bleeding of the low-resistance steam-water heat exchanger caused by overheating discharge is prevented; the basic principle is that a temperature sensor is used for outputting a 4-20mA signal to be transmitted to a controller, the controller is 35-45 ℃ lower than a set value, the closer to 40 ℃, the larger the output quantity of the domestic hot water delivery pump is.
Furthermore, the water level of the heat storage tank is controlled within a certain range, so that the phenomenon that the circulating water delivery pump generates cavitation due to too low liquid level in the heat storage tank and the heat storage tank overflows due to too high liquid level is prevented; the principle is that the switch is adopted for control, when the liquid level reaches the set lower limit of 20%, the water replenishing valve is opened, and when the liquid level reaches the set upper limit of 80%, the water replenishing valve is closed.
In conclusion, the invention solves the problems of cavitation of the electric conveying pump, damage of the flue gas economizer, unsmooth drainage of the equipment, thermal pollution of flash steam and the like in the prior art, saves energy sources, can realize unbalance of heat consumption time periods, and performs peak load elimination.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein: 1. a flash tank; 2. a drain valve; 3. a low resistance steam-water heat exchanger; 4. a water-water heat exchanger; 5. a condensate water delivery pump; 6. a circulating water delivery pump; 7. a heat storage tank; 8. an automatic water replenishing valve; 9. domestic hot water delivery pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
The invention provides a method for recovering waste heat of steam high-temperature condensate water, which leads the high-temperature condensate water to a flash tank, realizes steam-water separation and ensures that upstream steam consuming equipment drains smoothly. The water in the heat storage tank absorbs the latent heat of the flash steam through the low-resistance steam-water heat exchanger, so that the flash steam is liquefied, and the phenomenon of gas evolution is eliminated. The sensible heat of the liquid condensate water is absorbed by the water in the heat storage tank through the water-water heat exchanger, so that the temperature of the condensate water is reduced to 40 ℃, and then the condensate water is pumped back to a boiler room or a sewage well; when the temperature of the water in the heat storage tank rises to the highest temperature required by the heat exchange efficiency, the water is pumped to a domestic hot water end of a user.
Referring to fig. 1, a system used in the method for recovering the waste heat of the steam high-temperature condensed water of the present invention includes a flash tank 1, a trap 2, a low-resistance steam-water heat exchanger 3, a water-water heat exchanger 4, a condensed water delivery pump 5, a circulating water delivery pump 6, a heat storage tank 7, an automatic water supply valve 8, and a domestic hot water delivery pump 9.
The inlet end of flash tank 1 is connected with trap 2, the outlet end divides two the tunnel, be connected with the environment through low-resistance steam-water heat exchanger 3 all the way, another way is connected with the boiler room behind 4 primary side intakes of water-water heat exchanger and condensate water delivery pump 5, 4 secondary side exports of water-water heat exchanger are connected with the entry end of heat accumulation jar 7 through low-resistance steam-water heat exchanger 3, the outlet end of heat accumulation jar 7 divides two the tunnel, all the way through circulating water delivery pump 6 and 4 secondary side exit linkage of water-water heat exchanger, another way is connected with life hot water delivery pump 9, be provided with automatic water replenishing valve 8 on the heat accumulation jar 7.
A first liquid level sensor is arranged in the flash tank 1, a condensate water delivery pump 5 is connected with the first liquid level sensor, and the condensate water delivery pump 5 is a variable-frequency electric pump.
First level sensor can prevent that the liquid level from undulant by a wide margin, influences the working property and the life-span of comdenstion water delivery pump. The basic principle is that a liquid level sensor is used for generating 4-20mA signals to be transmitted to a controller, and the controller analyzes and judges the signals and then sends the 4-20mA signals to a frequency converter, so that the output flow of a pump is controlled. When the liquid level rises, the pump output flow increases, and when the liquid level decreases, the pump output flow decreases.
A second liquid level sensor and a temperature sensor are arranged in the heat storage tank 7, the automatic water replenishing valve 8 is connected with the second liquid level sensor, the domestic hot water delivery pump 9 is connected with the temperature sensor, and the domestic hot water delivery pump 9 is a variable-frequency electric pump.
The second liquid level sensor can prevent the circulating water delivery pump from generating cavitation due to too low liquid level in the hot tank and preventing the hot tank from overflowing due to too high liquid level; the basic principle is that the liquid level sensor generates 4-20mA signals and transmits the signals to the controller, the controller analyzes and judges the signals and then sends the 4-20mA signals to the water replenishing valve, and the water replenishing amount is controlled to maintain the liquid level to be stable. When the liquid level reaches the lower limit set value of 20%, the water replenishing valve is opened, and when the liquid level reaches the upper limit set value of 80%, the water replenishing valve is closed.
The temperature sensor can prevent the phenomenon of gas evolution caused by too high temperature of the hot tank, which leads to too high water temperature at the secondary side of the heat exchanger. The basic principle is that a temperature sensor is used for outputting a 4-20mA signal to a controller, the controller is compared with a set value of 40 ℃, if the temperature is higher than 40 ℃, a domestic hot water delivery pump outputs the signal according to the temperature deviation degree, and the closer the temperature is to 40 ℃, the larger the domestic hot water delivery pump outputs the signal.
The invention relates to a method for recovering waste heat of steam high-temperature condensed water, which comprises the following steps:
the temperature of the water-water heat exchanger entering the condensate water conveying pump 5 cannot be higher than 40 ℃, and the water temperature in the heat storage tank 7 cannot be higher than 40 ℃.
The high-temperature condensed water enters a flash tank 1 through a drain valve 2 of steam equipment for steam-water separation;
the separated flash steam is cooled by a low-resistance steam-water heat exchanger 3 and then flows back to the flash tank; the waste water is not discharged into the environment through the low-resistance steam-water heat exchanger 3;
after the temperature of the separated liquid condensate is reduced to be below 40 ℃ through the water-water heat exchanger 4, the liquid condensate is sent to a soft water tank of a boiler room through the condensate water delivery pump 5, the delivery amount of the condensate water is controlled through the condensate water delivery pump 5 through a first liquid level sensor arranged in the flash tank 1, and the liquid level in the flash tank 1 is always kept stable;
the water stored in the heat storage tank 7 enters the water-water heat exchanger 4 and the low-resistance steam-water heat exchanger 3 through the circulating water delivery pump 6 for absorbing heat, and the circulating water delivery pump 6 is a power frequency electric pump and is always in continuous operation.
The water level of the heat storage tank is controlled within a certain range, so that the situation that the circulating water delivery pump generates cavitation due to too low liquid level in the heat storage tank and the heat storage tank overflows due to too high liquid level is prevented.
When the water temperature rises to 35-45 ℃, the domestic hot water delivery pump 9 is started, the water in the heat storage tank 7 is delivered to the domestic hot water tank, when the liquid level is reduced by 20%, the automatic water replenishing valve 8 is opened to start water replenishing, and when the liquid level reaches the set upper limit of 80%, the water replenishing valve is closed.
The domestic hot water delivery pump 9 controls the delivery amount of the domestic hot water through a temperature sensor installed on the heat storage tank 7, and always keeps the temperature of the heat storage tank 7 stable.
The automatic water supplementing valve 8 controls the water supplementing amount through a second liquid level sensor on the heat storage tank 7, and the liquid level of the heat storage tank 7 is always kept stable.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a hospital application case, the amount of condensed water is 30 tons/hour, the water level of the flash tank is controlled to be about 40%, the heat of the condensed water is transferred to a domestic water replenishing tank (equivalent to a heat storage tank) through a water-water heat exchanger, and the water temperature of the water tank is not higher than 15 ℃. The water temperature of the boiler room is reduced to 13 ℃ by the condensed water. The application case of the invention recovers the available heat and the whole mass contained in the condensed water, thereby realizing the effects of energy conservation and emission reduction.
In conclusion, the method for recovering the waste heat of the steam high-temperature condensate water fully utilizes the cold source to absorb the heat of the high-temperature steam condensate water, solves the problems of electric pump cavitation, energy saver burst and flash steam thermal pollution in the prior art, and simultaneously preheats the heat of the cold source such as domestic hot water and the like, thereby achieving the effects of energy conservation and emission reduction.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a steam high temperature comdenstion water waste heat recovery system, a serial communication port, including flash tank (1), the entry end of flash tank (1) is provided with trap (2), the exit end of flash tank (1) divides two the tunnel, be connected with low-drag type soda heat exchanger (3) all the way, another way is connected with the boiler room behind the primary side import and the comdenstion water delivery pump (5) of water-water heat exchanger (4), the secondary side export of water-water heat exchanger (4) is connected with the entry end of heat accumulation jar (7) through low-drag type soda heat exchanger (3), the exit end of heat accumulation jar (7) divides two the tunnel, be connected with the secondary side exit linkage of water-water heat exchanger (4) through circulating water delivery pump (6) all the way, another way is connected with life hot water delivery pump (9), be provided with automatic water replenishing valve (8) on heat accumulation jar (7).
2. The steam high-temperature condensed water waste heat recovery system according to claim 1, wherein a first liquid level sensor is arranged in the flash tank (1), and the condensed water delivery pump (5) is connected with the first liquid level sensor.
3. The steam high-temperature condensed water waste heat recovery system according to claim 1, wherein the condensed water delivery pump (5) is a variable frequency electric pump.
4. The steam high-temperature condensed water waste heat recovery system according to claim 1, wherein a second liquid level sensor and a temperature sensor are arranged in the heat storage tank (7), the automatic water replenishing valve (8) is connected with the second liquid level sensor, and the domestic hot water delivery pump (9) is connected with the temperature sensor.
5. The steam high-temperature condensed water waste heat recovery system according to claim 1, wherein the domestic hot water delivery pump (9) is a variable frequency electric pump.
6. The method for recovering the waste heat of the steam high-temperature condensed water is characterized in that the method for recovering the waste heat of the steam high-temperature condensed water according to the claim 1 comprises the following specific steps:
high-temperature condensate water enters a flash tank through a drain valve to be subjected to steam-water separation; cooling the separated flash steam by a low-resistance steam-water heat exchanger, and then refluxing to a flash tank; the separated liquid condensate water is cooled by a water-water heat exchanger and then is sent to a soft water tank of a boiler room by a condensate water conveying pump; water stored in the heat storage tank enters the water-water heat exchanger and the low-resistance steam-water heat exchanger through the circulating water delivery pump and is used for absorbing heat, and the circulating water delivery pump is in a continuous operation state; when the water temperature rises to a set temperature, the domestic hot water delivery pump is started, water in the heat storage tank is delivered to the domestic hot water tank, when the liquid level is lowered to a lower limit set value, the automatic water replenishing valve is opened to start water replenishing, and when the liquid level rises to an upper limit set value, the water replenishing is stopped.
7. The method of claim 6, wherein the condensate transfer pump controls the transfer of condensate via a first level sensor mounted in the flash tank.
8. The method as claimed in claim 6, wherein the water temperature is set to 35-45 ℃, the upper set value of the liquid level is 80% and the lower set value is 20%.
9. The method according to claim 6, wherein the domestic hot water delivery pump controls the domestic hot water delivery amount by a temperature sensor mounted on the heat storage tank.
10. The method of claim 6, wherein the automatic water replenishment valve controls the amount of water replenished through a second level sensor on the thermal storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110644493.2A CN113217894A (en) | 2021-06-09 | 2021-06-09 | System and method for recovering waste heat of steam high-temperature condensate water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110644493.2A CN113217894A (en) | 2021-06-09 | 2021-06-09 | System and method for recovering waste heat of steam high-temperature condensate water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113217894A true CN113217894A (en) | 2021-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110644493.2A Pending CN113217894A (en) | 2021-06-09 | 2021-06-09 | System and method for recovering waste heat of steam high-temperature condensate water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116989328A (en) * | 2023-08-15 | 2023-11-03 | 北京昭衍生物技术有限公司 | Steam condensate waste heat recovery system |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116989328A (en) * | 2023-08-15 | 2023-11-03 | 北京昭衍生物技术有限公司 | Steam condensate waste heat recovery system |
| CN116989328B (en) * | 2023-08-15 | 2024-03-29 | 北京昭衍生物技术有限公司 | Steam condensate waste heat recovery system |
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