CN117029547A - Steam condensate water waste heat recovery system without drain valve and waste heat recovery method - Google Patents
Steam condensate water waste heat recovery system without drain valve and waste heat recovery method Download PDFInfo
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- CN117029547A CN117029547A CN202311144811.4A CN202311144811A CN117029547A CN 117029547 A CN117029547 A CN 117029547A CN 202311144811 A CN202311144811 A CN 202311144811A CN 117029547 A CN117029547 A CN 117029547A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 395
- 238000011084 recovery Methods 0.000 title claims abstract description 75
- 239000002918 waste heat Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 36
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 230000001502 supplementing effect Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 52
- 238000003860 storage Methods 0.000 claims description 37
- 238000007789 sealing Methods 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 claims description 25
- 239000002699 waste material Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 11
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to the technical field of steam condensate recovery, and discloses a steam condensate waste heat recovery system without a drain valve and a waste heat recovery method, wherein the steam condensate waste heat recovery system comprises a condensate pressure stabilizing module which is communicated with heat utilization equipment and is used for discharging condensate water generated when the heat utilization equipment adopts steam for heating; the closed condensate water recovery device is used for collecting condensate water discharged by the condensate water pressure stabilizing module; the water outlet of the closed condensed water recovery device is communicated with the water supplementing pool through a water inlet pipe, and a first heat exchanger and a second heat exchanger are sequentially arranged on the water inlet pipe. According to the steam condensate water waste heat recovery system without the drain valve and the waste heat recovery method, the drain valve is not used, so that the problem of steam leakage caused by the drain valve to the system is solved, the steam and condensate water heat utilization rate is high, the problem that the drain valve is easy to damage in use is solved, and the service life of the system is long.
Description
Technical Field
The invention relates to the field of steam condensate recovery, in particular to a steam condensate waste heat recovery system without a drain valve.
Background
Steam heating has high efficiency: steam heaters can rapidly heat buildings or equipment because they use high temperature steam; energy saving: the steam heater is more energy efficient than other heating devices. They can heat the space more rapidly, thereby reducing waste of energy; the operation is simple: the steam heater is very easy to install and operate. Their maintenance costs are also relatively low; the durability is strong: since the steam heaters are made of metal, they are more durable than other heating devices, and the like, steam heating is increasingly used in industrial production.
At present, steam is needed in lithium battery factory production, but most of steam systems adopt a drain valve for draining water, the drain valve is mainly used in a steam system pipeline, condensed water condensed by the steam system is discharged out of a pipeline, and the condensed water is prevented from entering subsequent equipment to influence normal operation of a unit.
Chinese patent document CN 111963882A discloses a waste heat recovery device for steam trap, which is provided with a gas-liquid inlet pipe communicated with a drain pipe of the steam trap, and uses high-temperature and high-pressure waste water to drive blades to realize power generation of a generator assembly.
In the prior art, steam in a steam system is discharged along with condensed water due to the drainage of the steam valve, so that a large amount of heat energy is wasted; the drain valve can carry steam when discharging condensate water at a high speed, and can leak steam when the drain valve is opened and the bypass valve is drained due to the blockage of the filter. And because the condensate collection adopts a master pipe, the operation of the whole condensate system can be influenced if only one failure causes steam leakage.
Therefore, it is necessary to provide a steam condensate waste heat recovery system without a drain valve to solve the problems in the prior art.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
At least partially solving the problems described above, the present invention provides a steam condensate waste heat recovery system without a drain valve, comprising,
the condensed water pressure stabilizing module is communicated with the heat utilization equipment and is used for discharging condensed water generated by the heat utilization equipment when the heat utilization equipment is heated by steam;
the closed condensate water recovery device is used for collecting condensate water discharged by the condensate water pressure stabilizing module;
the water outlet of the closed condensed water recovery device is communicated with the water supplementing pool through a water inlet pipe, and a first heat exchanger and a second heat exchanger are sequentially arranged on the water inlet pipe.
Preferably, the condensate water pressure stabilizing module comprises a control unit and a condensate water storage unit, wherein the bottom of the condensate water storage unit is connected with the drain valve, and the control unit controls the opening and closing of the drain valve.
Preferably, the closed condensate water recovery device comprises a sealed water tank, a water inlet of the sealed water tank is communicated with a water inlet main pipe, and the water inlet main pipe is communicated with the condensate water pressure stabilizing modules.
Preferably, a pressure sensor is arranged in the sealed water tank, and the pressure sensor is used for detecting the pressure value in the sealed water tank and transmitting the pressure value to the control unit;
the control unit compares the pressure value detected by the pressure sensor with a preset pressure value, the pressure value is lower than the preset pressure value, the control unit controls the drain valve to be opened, and condensed water in the condensed water storage unit is discharged.
Preferably, a liquid level sensor is arranged in the condensed water storage unit, and the liquid level sensor is used for detecting the liquid level height value of condensed water in the condensed water storage unit and transmitting the liquid level height value of condensed water to the control unit;
in the condensate water discharging process, the control unit compares the liquid level height value with the lowest preset liquid level height value, and when the real-time liquid level height detected by the liquid level sensor is lower than the lowest preset liquid level height value, the control unit controls the drain valve to be closed to stop water discharging.
Preferably, the closed condensate water recovery device further comprises a condensate water pump and a condensate water pump controller, wherein the condensate water pump controller controls the water yield of the condensate water pump, and the condensate water pump is used for conveying condensate water in the sealed water tank to the first heat exchanger and the second heat exchanger;
the condensate pump controller is respectively and electrically connected with the condensate pump and the control unit;
the control unit calculates the real-time condensate water production amount according to the liquid level height value acquired by the liquid level sensor in real time, calculates the condensate water production amount variation trend according to the acquired real-time condensate water production amount, calculates the condensate water production amount predicted value according to the condensate water production amount variation trend, and controls the water yield of the condensate water pump through the condensate water pump controller according to the condensate water production amount predicted value.
Preferably, the heat exchanger comprises a third heat exchanger, wherein the third heat exchanger is communicated with a steam header pipe through a steam inlet pipe, a steam ejector is arranged on the steam inlet pipe, and an ejector steam inlet pipe of the steam ejector is connected with a steam outlet pipe at the top of the sealed water tank in a sealing way.
Preferably, the closed condensate recovery apparatus includes: the processing shell, collect shell and sealed regulation casing, processing shell upper end fixedly set up sealed regulation casing, and processing shell upper end and sealed regulation casing intercommunication, processing shell lateral wall fixed mounting has the collection shell, and form the cavity that is used for the storage between collection shell and the processing shell, sealed regulation casing outer wall is equipped with the water inlet, sealed regulation casing inner wall has seted up spacing spout one, and rubber baffle activity locates in spacing spout one, rubber baffle middle part is equipped with filter screen one, first connecting rod one end activity runs through rubber baffle and with sealed regulation casing inner wall fixed connection, first connecting rod other end is equipped with the end of stopping head one, rubber spring one cup joints in first connecting rod outer wall, and rubber spring one end is fixed connection with sealed regulation casing inner wall and rubber baffle respectively, bracing piece one end and sealed regulation casing inner wall fixed connection, bracing piece one end is fixed connection with sealed regulation casing inner wall, the second connecting rod is equipped with the butt piece through the fixed block, the fixed block ball activity cup joints in the second connecting rod outer wall, and rubber spring two ends are equipped with fixed block and shutoff ball fixed connection respectively, the third connecting rod one end is connected with fixed block ball activity, the end is close to two end of sealing regulation casing inner wall and two end, two end sets of movable connection are equipped with the filter screen, two end of stopping block, two end sets are close to the inside the movable regulation casing inner wall and two end of the sealing regulation sliding block, and two end is set up the movable connection is equipped with two and two end-stop blocks and the bottom-stop block, and two end seal regulation sliding block inside is set up and movable joint, and bottom limit block is arranged inside and movable stop block and bottom is arranged, the filter screen III and the filter screen IV are all fixedly arranged on the inner wall of the treatment shell, the linear motor is fixedly connected with the outer wall of the treatment shell, the output end of the linear motor movably extends into the treatment shell and is fixedly connected with a push plate, the outer wall of the treatment shell is provided with a waste outlet, the waste outlet is communicated with a channel formed between the filter screen III and the filter screen IV, the middle part of the filter screen IV is provided with a sealing cavity, a driving motor is arranged in the sealing cavity in the middle part of the filter screen IV, one end of a supporting connecting rod is fixedly connected with the output shaft of the driving motor, the other end of the supporting connecting rod is movably connected with a rotating supporting sleeve, the sealing guiding sleeve is fixedly connected with the supporting connecting rod, a cavity structure is arranged in the sealing guiding sleeve, a reset spring is arranged in the sealing guiding sleeve, one end of the fourth connecting rod movably extends into the sealing guiding sleeve and is fixedly connected with the reset spring, the other end of the fourth connecting rod is fixedly connected with the scraping plate, one end of the supporting filtering frame is fixedly connected with the inner wall of the treatment shell, the other end of the supporting filtering frame is fixedly connected with the rotating supporting sleeve, and the bottom of the treatment shell is provided with a water outlet.
Preferably, a pipeline connected with the heat equipment by the condensate water pressure stabilizing module is provided with a heat static evacuation valve, and the heat static evacuation valve is used for discharging non-condensable gas in the heat equipment.
The invention also provides a steam condensate waste heat recovery method without a drain valve, which comprises the following steps,
collecting condensed water generated by heat equipment into a closed condensed water recovery device through a condensed water pressure stabilizing module;
the condensed water in the closed condensed water recovery device is conveyed to the first heat exchanger through a condensed water pump to exchange heat, and the temperature of the condensed water is reduced to 60 ℃;
after the condensed water passing through the first heat exchanger flows through the second heat exchanger for heat exchange, the temperature of the condensed water is reduced to 30 ℃, and finally the condensed water is sent to a water supplementing pool for use
Compared with the prior art, the invention at least comprises the following beneficial effects:
according to the steam condensate water waste heat recovery system without the drain valve and the waste heat recovery method, the drain valve is not used, the problem of steam leakage caused by the drain valve to the system is solved, the steam and condensate water heat utilization rate is high, the problem that the drain valve is easy to damage in use is solved, the service life of the system is long, sensible heat in the condensate water and condensate water is fully recovered, the resource waste is reduced, the condensate water voltage stabilizing module can adapt to system drainage and system pressure, and the waste heat recovery efficiency is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a steam condensate waste heat recovery system without a drain valve;
FIG. 2 is a schematic diagram of a condensate water pressure stabilizing module and a closed condensate water recovery apparatus according to the present disclosure;
FIG. 3 is a flow chart of the steam condensate waste heat recovery method without a drain valve disclosed by the invention;
FIG. 4 is a schematic view showing a part of the structure of the closed condensate recovery apparatus according to the present invention;
FIG. 5 is a schematic diagram showing a part of the structure of the closed condensate recovery apparatus according to the present invention;
fig. 6 is a schematic view of a part of the structure of the closed condensate recovery apparatus according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings and examples to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1, the present invention provides a steam condensate waste heat recovery system without a drain valve, comprising,
the condensed water pressure stabilizing module 1 is communicated with the heat utilization equipment 2 and is used for discharging condensed water generated when the heat utilization equipment is heated by steam;
a closed condensate recovery device 4 for collecting condensate discharged from the condensate pressure stabilizing module 1;
the water outlet of the closed condensate water recovery device 4 is communicated with a water supplementing pool 8 through a water inlet pipe 5, and a first heat exchanger 6 and a second heat exchanger 7 are sequentially arranged on the water inlet pipe 5.
The working principle of the technical scheme is as follows: the condensed water pressure stabilizing module 1 is communicated with the heat utilization equipment 2, condensed water generated by the heat utilization equipment 2 when the heat utilization equipment is heated is discharged into the closed condensed water recovery device 4 through the condensed water pressure stabilizing module, the condensed water recovery device 4 is used for collecting the condensed water discharged by the condensed water pressure stabilizing module 1, a water outlet of the closed condensed water recovery device 4 is communicated with the water supplementing pond 8 through the water inlet pipe 5, the first heat exchanger 6 and the second heat exchanger 7 are sequentially arranged on the water inlet pipe 5, high-temperature condensed water in the closed condensed water recovery device 4 is conveyed into the first heat exchanger 6 through the water inlet pipe to exchange heat, most of heat in the high-temperature condensed water is exchanged into the first heat exchanger, the temperature of the condensed water subjected to heat exchange through the first heat exchanger 6 is reduced to about 60 ℃, then the condensed water is subjected to heat exchange with the second heat exchanger, the condensed water at an outlet of the second heat exchanger is reduced to 30 ℃, and the condensed water subjected to sufficient heat exchange is discharged into the water supplementing pond, and the purified water can be used for supplementing water in the steam boiler;
the water inlet of the closed condensate recovery device 4 is communicated with the water inlet main pipe 3, the water inlet main pipe 3 is communicated with the water outlets of the condensate pressure stabilizing modules 1, and the condensate discharged by the condensate pressure stabilizing modules 1 is collected in the water inlet main pipe 3 and is collected to the closed condensate recovery device 4 from the water inlet main pipe;
the first heat exchanger can be an air conditioner circulating water heat exchanger;
the second heat exchanger may be a bath water heat exchanger.
The beneficial effects of the technical scheme are that:
according to the steam condensate water waste heat recovery system without the drain valve and the waste heat recovery method, the drain valve is not used, the problem of steam leakage caused by the drain valve to the system is solved, the steam and condensate water heat utilization rate is high, the problem that the drain valve is easy to damage in use is solved, the service life of the system is long, sensible heat in the condensate water and condensate water is fully recovered, the resource waste is reduced, the condensate water voltage stabilizing module can adapt to system drainage and system pressure, and the waste heat recovery efficiency is improved.
As shown in fig. 2, in one embodiment, the condensate water pressure stabilizing module 1 includes a control unit 11 and a condensate water storage unit 12, the bottom of the condensate water storage unit 12 is connected to a drain valve 13, and the control unit 11 controls opening and closing of the drain valve 13.
The working principle of the technical scheme is as follows: the condensate water pressure stabilizing module 1 comprises a control unit 11 and a condensate water storage unit 12, wherein the bottom of the condensate water storage unit 12 is connected with a drain valve 13, and the control unit 11 controls the opening and closing of the drain valve 13;
the condensed water storage unit 12 is used for temporarily storing and discharging condensed water generated when steam is used for heating in the heat utilization equipment 2, the bottom of the condensed water storage unit 12 is provided with the drain valve 13, the control unit 11 controls the drain valve 13 to be opened, the condensed water in the condensed water storage unit 12 is discharged, when the condensed water in the condensed water storage unit 12 reaches the lowest liquid level line, the control unit 11 controls the drain valve 13 to be closed, the condensed water with a certain water level is kept in the condensed water storage unit 12, the condensed water can play a role of water seal, and the waste of heat caused by the discharge of steam in the heat utilization equipment from the drain valve 13 is prevented.
The beneficial effects of the technical scheme are that: the condensate water pressure stabilizing module 1 is used for replacing a drain valve, so that steam in the heat utilization equipment can be prevented from being discharged along with the condensate water when the condensate water is discharged, and compared with the drain valve, the condensate water pressure stabilizing module 1 is low in cost and longer in service life.
As shown in fig. 2, in one embodiment, the closed condensate recovery apparatus 4 includes a sealed water tank 41, a water inlet of the sealed water tank 41 is communicated with a water inlet header pipe 3, and the water inlet header pipe 3 is communicated with a plurality of condensate pressure stabilizing modules 1.
The working principle of the technical scheme is as follows: the water inlet of the sealing water tank 41 is communicated with the water inlet main pipe 3, and the water inlet main pipe 3 is communicated with a plurality of condensate water pressure stabilizing modules 1;
the water inlet header pipe 3 collects a plurality of high-temperature condensed water discharged by heat equipment, the high-temperature condensed water is collected in the sealed water tank 41, flash evaporation can be generated when the high-temperature condensed water enters the traditional open water tank, steam generated by flash evaporation can cause steam leakage and overflow, a large amount of heat is wasted, some factories can only lead the steam to the roof for discharging, and the factory image can be greatly influenced while the waste is caused.
The beneficial effects of the technical scheme are that: the sealed condensate recovery device 4 adopts the sealed water tank 41, can seal the condensate in a sealed system, and cannot cause heat loss in the condensation waste heat recovery process.
In one embodiment, a pressure sensor 410 is provided in the sealed water tank 41, and the pressure sensor 410 is configured to detect a pressure value in the sealed water tank 41 and transmit the pressure value to the control unit 11;
the control unit 11 compares the pressure value detected by the pressure sensor 410 with a preset pressure value, the pressure value is lower than the preset pressure value, the control unit 11 controls the drain valve 13 to be opened, and the condensed water in the condensed water storage unit 12 is discharged.
The working principle of the technical scheme is as follows: a pressure sensor 410 is provided in the sealed water tank 41, and the pressure sensor 410 is used for detecting a pressure value in the sealed water tank 41 and transmitting the pressure value to the control unit 11;
the control unit 11 compares the pressure value detected by the pressure sensor 410 with a preset pressure value, and when the pressure value is lower than the preset pressure value, the control unit 11 controls the drain valve 13 to be opened to drain the condensed water in the condensed water storage unit 12;
after the condensed water in the sealed water tank 41 is transferred to the first heat exchanger 6 and the second heat exchanger 7 by the condensed water pump 42, the condensed water in the sealed water tank 41 is reduced, the pressure in the sealed water tank 41 is reduced, and when the pressure value is lower than a preset pressure value, the control unit 11 controls the drain valve 13 to open, and under the pressure of the steam in the heat utilization device 2, the high-temperature condensed water in the condensed water storage unit 12 is discharged into the sealed water tank.
The beneficial effects of the technical scheme are that: the high-temperature condensed water in the condensed water storage unit 12 is controlled to be discharged into the sealed water tank according to the pressure value in the sealed water tank 41, so that the condensed water pressure stabilizing module 1 can adapt to the pressure change of a heat exchange system, and the heat exchange efficiency of the heat exchanger is improved.
In one embodiment, a liquid level sensor is disposed in the condensed water storage unit 12, and the liquid level sensor is used for detecting a condensed water liquid level height value in the condensed water storage unit 12 and transmitting the condensed water liquid level height value to the control unit 11;
during the condensate water draining process, the control unit 11 compares the liquid level height value with the lowest preset liquid level height value, and when the real-time liquid level height value detected by the liquid level sensor is lower than the lowest preset liquid level height value, the control unit 11 controls the drain valve 13 to close to stop draining.
The working principle of the technical scheme is as follows: a liquid level sensor is arranged in the condensed water storage unit 12, and the liquid level sensor is used for detecting the liquid level height value of condensed water in the condensed water storage unit 12 and transmitting the liquid level height value of the condensed water to the control unit 11;
in the drainage process, the control unit 11 compares the liquid level height value with the lowest preset liquid level height value, and when the real-time liquid level height detected by the liquid level sensor is lower than the lowest preset liquid level height value, the control unit 11 controls the drain valve 13 to close so as to stop drainage;
a liquid level sensor is arranged in the condensed water storage unit 12, the liquid level of condensed water in the condensed water storage unit 12 is detected in real time, the liquid level value detected in real time is transmitted to the control unit, the lowest liquid level value is preset for the control unit 11, when the liquid level of the condensed water is lower than the lowest liquid level value, the control unit 11 closes the drain valve 13, drainage is stopped, and the bottom of the condensed water storage unit 12 is kept with condensed water with a certain height.
The beneficial effects of the technical scheme are that: the condensed water with a certain water level is always kept at the lower part of the condensed water storage unit 12, and in the working process of the heat utilization equipment, the condensed water at the lower part of the condensed water storage unit can play a role of water seal to prevent steam from overflowing from the drain valve along with high-temperature condensed water.
In one embodiment, the closed condensate recovery apparatus 4 further includes a condensate pump 42 and a condensate pump controller 43, the condensate pump controller 43 controlling the water output of the condensate pump 42, the condensate pump 42 for delivering condensate in the sealed water tank to the first heat exchanger 6 and the second heat exchanger 7;
the condensate pump controller 43 is electrically connected with the condensate pump 42 and the control unit 11, respectively;
the control unit 11 calculates the real-time condensate water production amount of the condensate water according to the liquid level height value acquired in real time by the liquid level sensor, calculates the condensate water production amount variation trend according to the acquired real-time condensate water production amount, calculates the condensate water production amount predicted value according to the condensate water production amount variation trend, and controls the water yield of the condensate pump 42 through the condensate pump controller 43 according to the condensate water production amount predicted value.
The working principle of the technical scheme is as follows: a condensate pump 42 is arranged on a water inlet pipe of a water outlet of the sealed water tank, a condensate pump controller 43 is arranged, the condensate pump controller 43 controls the water yield of the condensate pump 42, and the condensate pump 42 is used for conveying high-temperature condensate water in the sealed water tank to the first heat exchanger 6 and the second heat exchanger 7; the condensate pump controller 43 is electrically connected with the condensate pump 42 and the control unit 11, respectively;
the control unit 11 controls the transportation of the high-temperature condensed water in the sealed water tank to the first heat exchanger and the second heat exchanger according to the drainage condition of the condensed water storage unit 12, when the heat utilization device 2 just starts to work, the output of the high-temperature condensed water is regulated, the pressure in the sealed water tank is kept stable, after the heat utilization device works normally, the high-temperature condensed water output in the sealed water tank 41 is consistent with the amount of the condensed water generated by the heat utilization device, the amount of the condensed water generated by the heat utilization device basically keeps unchanged, the amount of the high-temperature condensed water output by the condensed water pump also keeps unchanged, the heat supplied to the first heat exchanger 6 and the second heat exchanger 7 basically stabilizes, and the whole condensed water waste heat recovery system keeps balanced;
the control unit 11 calculates the real-time condensate water production amount of the condensate water according to the liquid level height value acquired in real time by the liquid level sensor, calculates the condensate water production amount variation trend according to the acquired real-time condensate water production amount, calculates the condensate water production amount predicted value according to the condensate water production amount variation trend, and controls the water yield of the condensate pump 42 through the condensate pump controller 43 according to the condensate water production amount predicted value.
The beneficial effects of the technical scheme are that: the control unit 11 controls the water flow of the high-temperature condensed water discharged from the sealed water tank, so that the water flow of the discharged high-temperature condensed water is kept within a set range, the high-temperature condensed water achieves a good heat exchange effect in the first heat exchanger and the second heat exchanger, and the heat exchange efficiency is improved;
the control unit controls the discharge of high-temperature condensed water in the sealed water tank according to the predicted generation amount of the condensed water, can keep the water quantity and pressure of the sealed water tank stable, prevent the danger caused by overhigh pressure in the sealed water tank, can also keep the stability of the water quantity conveyed into the heat exchanger by the sealed water tank, and improves the heat exchange efficiency.
In one embodiment, the heat exchanger comprises a third heat exchanger 9, the third heat exchanger 9 is communicated with the steam header pipe 10 through a steam inlet pipe 91, a steam ejector is arranged on the steam inlet pipe 91, and an ejector steam inlet pipe of the steam ejector is in sealing connection with a steam outlet pipe at the top of the sealed water tank 41.
The working principle of the technical scheme is as follows: the heat exchanger comprises a third heat exchanger 9, wherein the third heat exchanger 9 is communicated with a steam header pipe 10 through a steam inlet pipe 91, a steam ejector is arranged on the steam inlet pipe 91, and an ejector steam inlet pipe of the steam ejector is in sealing connection with a steam outlet pipe at the top of a sealing water tank 41;
the high-temperature condensed water enters the sealed water tank 41, and flash evaporation can be generated in the sealed water tank 41 due to the fact that the pressure in the sealed water tank 41 is lower than the pressure in the heat utilization equipment 2, and the flash evaporation steam is ejected out of the sealed water tank 41 by the steam ejector and is used for heating the third heat exchanger;
the steam ejector is arranged on a steam inlet pipe 91 connected with the steam header pipe 10 of the third heat exchanger 9, and an ejector steam inlet pipe of the steam ejector is connected with a steam outlet pipe at the top of the sealed water tank 41 in a sealing way;
the steam ejector is a fluid mechanical device for sucking low-pressure steam by high-pressure steam, has the advantages of simple structure, low operation cost, obvious energy-saving effect and the like, the steam ejector arranged on the steam inlet pipe 91 sucks the flash steam in the sealed water tank 41 by using the high-pressure steam in the steam header pipe 10, mixes the flash steam with the high-pressure steam,
the third heat exchanger may be a warm water heat exchanger.
The beneficial effects of the technical scheme are that: the flash steam in the sealed water tank is ejected out of the sealed water tank, so that the heat utilization efficiency is improved, and when the condensate water pressure stabilizing module 1 fails, the steam is ejected out for heating the third heat exchanger, and the pressure in the sealed water tank can be prevented from being too high.
In one embodiment, as shown in fig. 4 to 6, the closed condensate recovery apparatus 4 includes: the treatment shell 14, the collection shell 15 and the seal adjustment shell 16 are fixedly arranged at the upper end of the treatment shell 14, the seal adjustment shell 16 is fixedly arranged at the upper end of the treatment shell 14, the upper end of the treatment shell 14 is communicated with the seal adjustment shell 16, the collection shell 15 is fixedly arranged on the outer side wall of the treatment shell 14, a cavity for storage is formed between the collection shell 15 and the treatment shell 14, the outer wall of the seal adjustment shell 16 is provided with a water inlet 18, the inner wall of the seal adjustment shell 16 is provided with a limit chute I17, a rubber baffle 19 is movably arranged in the limit chute I17, a filter screen I20 is arranged in the middle of the rubber baffle 19, one end of a first connecting rod 22 movably penetrates the rubber baffle 19 and is fixedly connected with the inner wall of the seal adjustment shell 16, a stop head I23 is arranged at the other end of the first connecting rod 22, a rubber spring I21 is sleeved on the outer wall of the first connecting rod 22, two ends of the rubber spring I21 are respectively fixedly connected with the inner wall of the seal adjustment shell 16 and the rubber baffle 19, one end of a first supporting rod 24 is fixedly connected with the inner wall of the seal adjusting shell 16, an abutting part 25 is fixedly arranged at the other end of the first supporting rod 24, a second connecting rod 27 is connected with the front inner wall and the rear inner wall of the seal adjusting shell 16 through a fixed block 29, a sealing ball 26 is movably sleeved on the outer wall of the second connecting rod 27, a second rubber spring 28 is sleeved on the outer wall of the second connecting rod 27, two ends of the second rubber spring 28 are respectively fixedly connected with the fixed block 29 and the sealing ball 26, one end of a third connecting rod 30 is movably connected with the sealing ball 26, the other end of the third connecting rod 30 is movably connected with the top of a push rod 31, a second filter screen 33 is fixedly connected with the inner wall of the seal adjusting shell 16, a limiting block 32 is fixedly arranged in the middle of the second filter screen 33, a limiting block 32 is movably penetrated at the bottom of the push rod 31, a second stop head 35 is fixedly arranged, one ends of two groups of opening and closing plates 36 close to the inner wall of the seal adjusting shell 16 are rotatably connected with the inner wall of the seal adjusting shell 16, the opening plate 36 is provided with a limiting sliding groove II 38, the guide sliding block 37 is movably arranged in the limiting sliding groove II 38, two ends of the rubber spring III 34 are fixedly connected with the guide sliding block 37 and the bottom of the filter screen II 33 respectively, the filter screen III 39 and the filter screen IV 45 are fixedly arranged on the inner wall of the treatment shell 14, the linear motor 40 is fixedly connected with the outer wall of the treatment shell 14, the output end of the linear motor 40 movably extends into the treatment shell 14 and is fixedly connected with the push plate 44, the outer wall of the treatment shell 14 is provided with a waste outlet 47, the waste outlet 47 is communicated with a channel formed between the filter screen III 39 and the filter screen IV 45, the middle part of the filter screen IV 45 is provided with a sealing cavity, the driving motor 46 is arranged in the sealing cavity in the middle part of the filter screen IV 45, one end of the supporting connecting rod 48 is fixedly connected with the output shaft of the driving motor 46, the other end of the supporting connecting rod 48 is movably connected with the rotating supporting sleeve 55, the sealing guiding sleeve 49 is fixedly connected with the supporting connecting rod 48, the cavity 50 is arranged in the sealing guiding sleeve 49, one end of the fourth connecting rod 51 is movably extends into the sealing guiding sleeve 49 and is fixedly connected with the reset spring 52, the other end of the fourth connecting rod 51 is fixedly connected with the sealing guiding sleeve 52, the other end of the fourth connecting rod 51 is fixedly connected with the scraping plate 53, one end of the supporting the inner wall 54 is fixedly connected with the bottom of the treatment shell 14, the bottom of the filtering frame 54 is fixedly connected with the supporting the filtering frame 56, and the bottom of the filtering frame is fixedly connected with the bottom of the supporting the filtering frame 56 is fixedly connected with the supporting the filtering box 56.
The working principle of the technical scheme has the beneficial effects that: the water inlet 18 is connected with a water inlet pipe of a water outlet of the sealed water tank, the condensate pump controller 43 controls the condensate pump 42 to pump the condensate water into the sealed regulating shell 16 through the water inlet 18 and filter the condensate water through the first filter screen 20, then the blocking ball 26 is impacted and pushed to move along the outer wall of the second connecting rod 27 in a direction away from the abutting piece 25, the second rubber spring 28 stretches, the blocking ball 26 pushes the push rod 31 downwards through the third connecting rod 30 at the moment and pushes the opening and closing plate 36 downwards through the second stop head 35, and as the blocking ball 26 is not abutted with the abutting piece 25 any more, the condensate water flows down to the third filter screen 39 and the fourth filter screen 45 through the opening and closing plate 36 which is opened, residues of the condensate water filtered on the fourth filter screen 45 are accumulated on the fourth filter screen 45 at the moment, the linear motor 40 is started to push the push plate 44 to push accumulated residues into a cavity formed between the collecting housing 15 and the processing housing 14 through the waste outlet 47, then condensed water flows to the water outlet 56 through the supporting filter frame 54, the water outlet 56 is communicated with the first heat exchanger 6 and the second heat exchanger 7 through the three-way valve, the opening and closing plate 36 can be opened and closed at a corresponding angle according to the water flow speed and the impact force of the condensed water in the mode, so that the filtering can be performed according to the actual water flow, the inner wall of the processing housing 14 accumulates the scale in the long-time water storage process, at the moment, the supporting connecting rod 48 is driven to rotate through the starting of the driving motor 46, the fourth connecting rod 51 is thrown outwards along the sealing guide sleeve 49 under the action of the centrifugal force, the scraping plate 53 is contacted with the inner wall of the processing housing 14 to scrape the accumulated scale thereon, when the driving motor 46 is turned off, the reset spring 52 pulls the fourth connecting rod 51 to drive the scraping plate 53 to reset, so that the cleanliness of the inner wall of the treatment shell 14 can be ensured, and the treatment shell is simple and convenient.
In one embodiment, a thermal static evacuation valve is arranged on the pipeline of the condensate water pressure stabilizing module 1 connected with the heat utilization equipment 2, and the thermal static evacuation valve is used for discharging non-condensable gas in the heat utilization equipment 2.
The working principle and the beneficial effects of the technical scheme are as follows: the pipeline that comdenstion water steady voltage module 1 and heat equipment 2 are connected is last to set up the thermostatic air valve, and thermostatic air valve is arranged in the noncondensable gas in the heat equipment 2 of discharge, and the noncondensable gas such as the air in the heat equipment of discharge when work begins reduces the heat loss that noncondensable gas caused to can guarantee that steam is not discharged.
As shown in fig. 6, the invention also provides a method for recovering waste heat of steam condensate without a drain valve, which comprises,
collecting condensed water generated by the heat utilization equipment 2 into a closed condensed water recovery device 4 through a condensed water pressure stabilizing module 1;
the condensed water in the closed condensed water recovery device 4 is conveyed to the first heat exchanger 6 for heat exchange through a condensed water pump, and the temperature of the condensed water is reduced to 60 ℃;
after the condensed water passing through the first heat exchanger 6 flows through the second heat exchanger 7 for heat exchange, the temperature of the condensed water is reduced to 30 ℃, and finally the condensed water is sent to a water supplementing pool for use.
The working principle of the technical scheme is as follows: collecting high-temperature condensed water generated by the heat utilization equipment 2 into a closed condensed water recovery device through a condensed water pressure stabilizing module;
high-temperature condensed water in the closed condensed water recovery device is conveyed to the first heat exchanger through the condensed water pump to exchange heat, and the temperature of the condensed water is reduced to 60 ℃;
and after the condensed water passing through the first heat exchanger flows through the second heat exchanger for heat exchange, the temperature of the condensed water is reduced to 30 ℃, and finally the condensed water is sent to a water supplementing pool for use.
The beneficial effects of the technical scheme are that: the steam leakage problem of the system caused by the drain valve is eliminated without using the drain valve, the heat utilization rate of the steam and the condensed water is high, the problem that the drain valve is easy to damage in use is eliminated, the service life of the system is long, the condensed water and sensible heat in the condensed water are completely recovered, the resource waste is reduced, the condensed water pressure stabilizing module can realize that the drainage of the system is adaptive to the pressure of the system, and the waste heat recovery efficiency is improved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. A steam condensate waste heat recovery system without a drain valve is characterized by comprising,
the condensed water pressure stabilizing module (1) is communicated with the heat utilization equipment (2) and is used for discharging condensed water generated by the heat utilization equipment (2) when the heat utilization equipment is heated by steam;
the closed condensate water recovery device (4) is used for collecting condensate water discharged by the condensate water pressure stabilizing module (1);
the water outlet of the closed condensate water recovery device (4) is communicated with the water supplementing tank (8) through a water inlet pipe (5), and a first heat exchanger (6) and a second heat exchanger (7) are sequentially arranged on the water inlet pipe (5).
2. The steam condensate water waste heat recovery system without drain valve according to claim 1, wherein the condensate water pressure stabilizing module (1) comprises a control unit (11) and a condensate water storage unit (12), the bottom of the condensate water storage unit (12) is connected with a drain valve (13), and the control unit (11) controls the opening and closing of the drain valve (13).
3. The steam condensate water waste heat recovery system without drain valve according to claim 2, wherein the closed condensate water recovery device (4) comprises a sealed water tank (41), a water inlet of the sealed water tank (41) is communicated with a water inlet main pipe (3), and the water inlet main pipe (3) is communicated with a plurality of condensate water pressure stabilizing modules (1).
4. A steam condensate water waste heat recovery system without drain valve according to claim 3, wherein a pressure sensor (410) is arranged in the sealed water tank (41), the pressure sensor (410) is used for detecting a pressure value in the sealed water tank (41) and transmitting the pressure value to the control unit (11);
the control unit (11) compares the pressure value detected by the pressure sensor (410) with a preset pressure value, and when the pressure value is lower than the preset pressure value, the control unit (11) controls the drain valve (13) to be opened so as to drain the condensed water in the condensed water storage unit (12).
5. The steam condensate water waste heat recovery system without drain valve according to claim 4, wherein a liquid level sensor is arranged in the condensate water storage unit (12), and the liquid level sensor is used for detecting a condensate water liquid level height value in the condensate water storage unit (12) and transmitting the condensate water liquid level height value to the control unit (11);
in the condensate water discharging process, the control unit (11) compares the liquid level height value with the lowest preset liquid level height value, and when the real-time liquid level height detected by the liquid level sensor is lower than the lowest preset liquid level height value, the control unit (11) controls the drain valve (13) to close to stop water discharging.
6. The steam condensate water waste heat recovery system without drain valve according to claim 5, wherein the closed condensate water recovery device (4) further comprises a condensate water pump (42) and a condensate water pump controller (43), the condensate water pump controller (43) controlling the water yield of the condensate water pump (42), the condensate water pump (42) being used for conveying condensate water in the sealed water tank to the first heat exchanger (6) and the second heat exchanger (7);
the condensate pump controller (43) is respectively and electrically connected with the condensate pump (42) and the control unit (11);
the control unit (11) calculates the real-time condensate water production amount of the condensate water according to the liquid level height value acquired in real time by the liquid level sensor, calculates the condensate water production amount variation trend according to the acquired real-time condensate water production amount, calculates the condensate water production amount predicted value according to the condensate water production amount variation trend, and controls the water yield of the condensate water pump (42) through the condensate water pump controller (43) according to the condensate water production amount predicted value.
7. The steam condensate water waste heat recovery system without drain valve according to claim 1, comprising a third heat exchanger (9), wherein the third heat exchanger (9) is communicated with a steam main pipe (10) through a steam inlet pipe (91), a steam ejector is arranged on the steam inlet pipe (91), and an ejector steam inlet pipe of the steam ejector is in sealing connection with a steam outlet pipe at the top of the sealing water tank (41).
8. The steam condensate waste heat recovery system without a drain valve according to claim 3, wherein,
the closed condensate water recovery device (4) comprises: the utility model provides a processing shell (14), collect shell (15) and sealed regulation casing (16), processing shell (14) upper end is fixed to be equipped with sealed regulation casing (16), and processing shell (14) upper end and sealed regulation casing (16) intercommunication, processing shell (14) lateral wall fixed mounting has collection shell (15), and form the cavity that is used for the storage between collection shell (15) and processing shell (14), sealed regulation casing (16) outer wall is equipped with water inlet (18), limit chute (17) have been seted up to sealed regulation casing (16) inner wall, and rubber baffle (19) activity is located in limit chute (17), rubber baffle (19) middle part is equipped with filter screen one (20), first connecting rod (22) one end activity runs through rubber baffle (19) and with sealed regulation casing (16) inner wall fixed connection, first connecting rod (22) other end is equipped with stop first (23), rubber spring one (21) cup joints in first connecting rod (22) outer wall, and rubber spring one (21) both ends respectively with sealed regulation casing (16) inner wall and rubber baffle (19) fixed connection, bracing piece one end (24) and sealed regulation casing (16) inner wall fixed connection piece (25), the second connecting rod (27) is connected with the front and rear inner walls of the sealing adjusting shell (16) through a fixed block (29), the plugging ball (26) is movably sleeved on the outer wall of the second connecting rod (27), the rubber spring II (28) is sleeved on the outer wall of the second connecting rod (27), two ends of the rubber spring II (28) are respectively fixedly connected with the fixed block (29) and the plugging ball (26), one end of the third connecting rod (30) is movably connected with the plugging ball (26), the other end of the third connecting rod (30) is movably connected with the top of the push rod (31), the second filter screen (33) is fixedly connected with the inner wall of the sealing adjusting shell (16), a limiting block (32) is fixedly arranged in the middle of the second filter screen (33), a limiting block (32) is movably penetrated at the bottom of the push rod (31) and is fixedly provided with a stop head II (35), one ends of two groups of opening and closing plates (36) close to the inner wall of the sealing adjusting shell (16) are respectively rotatably connected with the inner wall of the sealing adjusting shell (16), a limiting sliding groove II (38) is formed in the opening and closing plate (36), a guiding sliding block (37) is movably arranged in the limiting sliding block II (38), the three ends of the rubber spring (34) are respectively fixedly connected with the two ends of the third filter screen (37) and the bottom of the fourth filter screen (14) respectively, the linear motor (40) is fixedly connected with the outer wall of the treatment shell (14), the output end of the linear motor (40) movably extends into the treatment shell (14) and is fixedly connected with the push plate (44), the outer wall of the treatment shell (14) is provided with a waste outlet (47), the waste outlet (47) is communicated with a channel formed between a filter screen III (39) and a filter screen IV (45), a sealing cavity is formed in the middle of the filter screen IV (45), a driving motor (46) is arranged in the sealing cavity in the middle of the filter screen IV (45), one end of a supporting connecting rod (48) is fixedly connected with the output shaft of the driving motor (46), the other end of the supporting connecting rod (48) is movably connected with a rotary supporting sleeve (55), the sealing guiding sleeve (49) is fixedly connected with the supporting connecting rod (48), a cavity (50) structure is arranged in the sealing guiding sleeve (49), a reset spring (52) is arranged in the sealing guiding sleeve (49), one end of a fourth connecting rod (51) movably extends into the sealing guiding sleeve (49) and is fixedly connected with the reset spring (52), the other end of the fourth connecting rod (51) is fixedly connected with a scraper blade (53), one end of the supporting filtering frame (54) is fixedly connected with the inner wall of the treatment shell (54), a water outlet (56) is arranged at the bottom of the treatment shell (14).
9. The steam condensate water waste heat recovery system without drain valve according to claim 1, wherein a thermal static evacuation valve is arranged on a pipeline connected with the heat utilization equipment (2) by the condensate water pressure stabilizing module (1), and the thermal static evacuation valve is used for discharging non-condensable gas in the heat utilization equipment (2).
10. A waste heat recovery method using the steam condensate waste heat recovery system without drain valve as claimed in any one of claims 1 to 9, comprising
Collecting condensed water generated by the heat equipment (2) into a closed condensed water recovery device (4) through a condensed water voltage stabilizing module (1);
the condensed water in the closed condensed water recovery device (4) is conveyed to the first heat exchanger (6) for heat exchange through a condensed water pump, and the temperature of the condensed water is reduced to 60 ℃;
after the condensed water passing through the first heat exchanger (6) flows through the second heat exchanger (7) for heat exchange, the temperature of the condensed water is reduced to 30 ℃, and finally the condensed water is sent to a water supplementing pool for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311144811.4A CN117029547A (en) | 2023-09-06 | 2023-09-06 | Steam condensate water waste heat recovery system without drain valve and waste heat recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311144811.4A CN117029547A (en) | 2023-09-06 | 2023-09-06 | Steam condensate water waste heat recovery system without drain valve and waste heat recovery method |
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| Publication Number | Publication Date |
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| CN117029547A true CN117029547A (en) | 2023-11-10 |
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|---|---|---|---|
| CN202311144811.4A Pending CN117029547A (en) | 2023-09-06 | 2023-09-06 | Steam condensate water waste heat recovery system without drain valve and waste heat recovery method |
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| Country | Link |
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| CN (1) | CN117029547A (en) |
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2023
- 2023-09-06 CN CN202311144811.4A patent/CN117029547A/en active Pending
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