CN115055640A - Waste heat recovery system - Google Patents
Waste heat recovery system Download PDFInfo
- Publication number
- CN115055640A CN115055640A CN202210242167.3A CN202210242167A CN115055640A CN 115055640 A CN115055640 A CN 115055640A CN 202210242167 A CN202210242167 A CN 202210242167A CN 115055640 A CN115055640 A CN 115055640A
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- Prior art keywords
- pipe
- water
- wax
- heat
- recovery system
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
- F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
Abstract
The invention discloses a waste heat recovery system, comprising: a steam generator for generating steam; the first collecting device is provided with a dewaxing kettle for containing steam, a first air inlet pipe communicated with the dewaxing kettle and a first air collecting pipe communicated with the dewaxing kettle, and the first air inlet pipe receives the steam from a steam generator; the heat exchange device is provided with a water tank, a first heat exchange pipe and a first water pipe, wherein the water tank is loaded with heat exchange water, the first heat exchange pipe is arranged in the water tank and is communicated with the first gas collecting pipe, and the first water pipe is communicated with the water tank; the wax injection device is provided with a wax storage tank, a wax injection machine and a wax conveying pipe communicated with the wax storage tank and the wax injection machine, and the first water pipe is arranged in the wax storage tank and the wax conveying pipe. The invention can collect the redundant heat in the dewaxing kettle, and the redundant heat is utilized in wax heat preservation.
Description
Technical Field
The invention relates to the technical field of wax pattern production equipment, in particular to a waste heat recovery system.
Background
The lost wax casting includes the steps of pressing wax, trimming wax, assembling tree, dipping slurry, melting wax, casting metal, etc.
The wax melting is to melt the wax in the mould shell through high temperature, so that the wax liquid flows out of the mould shell.
In general, in wax melting processing, a steam generator is used to generate steam, high-temperature steam enters a dewaxing kettle through a steam pipeline, and wax in a mould shell is quickly melted and flows out under the action of the high-temperature and high-pressure steam.
However, the excess steam in the dewaxing kettle needs to be discharged after being used, and the heat of the excess steam is wasted, which causes serious waste of heat source.
In the wax pressing process, the wax needs to be subjected to heat preservation treatment to ensure that the wax liquid in the wax storage barrel is conveyed to a wax injection machine in a fluid form through a pipeline, and the wax injection machine injects the wax liquid into a mold, so that a wax mold is formed.
If the redundant steam heat in the dewaxing kettle can be collected and utilized in wax heat preservation, thereby saving energy and reducing consumption and being beneficial to the long-term development of enterprises.
Thus, there is a need for a waste heat recovery system that reduces energy consumption.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a waste heat recovery system which can collect the redundant heat in a dewaxing kettle and utilize the waste heat in wax heat preservation.
A waste heat recovery system according to an embodiment of a first aspect of the present invention includes: a steam generator for generating steam; the first collecting device is provided with a dewaxing kettle for containing steam, a first air inlet pipe communicated with the dewaxing kettle and a first air collecting pipe communicated with the dewaxing kettle, and the first air inlet pipe receives the steam from a steam generator; the heat exchange device is provided with a water tank, a first heat exchange pipe and a first water pipe, wherein the water tank is loaded with heat exchange water, the first heat exchange pipe is arranged in the water tank and is communicated with the first gas collecting pipe, and the first water pipe is communicated with the water tank; the wax injection device is provided with a wax storage tank, a wax injection machine and a wax conveying pipe communicated with the wax storage tank and the wax injection machine, and the first water pipe is arranged in the wax storage tank and the wax conveying pipe.
According to some embodiments of the invention, the first heat exchange tube has a first spiral tube portion located within the tank.
According to some embodiments of the invention, the first heat exchange tube is provided with a trap, a first return tube in communication with the trap, the first return tube in communication with a steam generator.
According to some embodiments of the invention, the first water tube has a second helical tube portion extending along the inner wall of the wax storage tank.
According to some embodiments of the invention, the sintering furnace further comprises a sintering furnace, a second collecting device and a second heat exchanging device, the sintering furnace comprises a body, a heat storage box arranged on one side of the body, and a hot air pipe communicating the body with the heat storage box, high-alumina balls are arranged in the heat storage box and used for absorbing heat from the body, the second collecting device comprises an annular barrel sleeved on the heat storage box, a first water inlet pipe communicated with the annular barrel, and a first water supply pipe communicated with the annular barrel, the annular barrel is used for accommodating heated water, the second heat exchanging device comprises a second heat exchanging pipe arranged in the water barrel, and the second heat exchanging pipe is communicated with the first water supply pipe.
According to some embodiments of the invention, a second return pipe is arranged between the second heat exchanging pipe and the first water inlet pipe, and the second return pipe is provided with a water pump.
According to some embodiments of the invention, the annular barrel is externally provided with insulating cotton.
According to some embodiments of the invention, the wax conveying pipe is sleeved with an insulating layer and a stainless steel pipe sleeved on the insulating layer.
According to some embodiments of the invention, a third return line is provided between the water tank and the first water line.
According to some embodiments of the invention, the water tank is provided with an overflow valve, a drain pipe communicating with the overflow valve.
The waste heat recovery system provided by the embodiment of the invention at least has the following beneficial effects:
firstly, the first collecting device is arranged, so that the first collecting device is provided with a dewaxing kettle, a first air inlet pipe and a first air collecting pipe, steam of a steam generator enters the dewaxing kettle through the first air inlet pipe, and redundant steam enters the first air collecting pipe after a mould shell of the dewaxing kettle is dewaxed, so that redundant heat in dewaxing can be collected, and heat waste is reduced.
Meanwhile, the heat exchange device is provided with the water tank, the first heat exchange tube and the first water tube, the first heat exchange tube receives the steam of the first gas collecting tube, the first heat exchange tube heats the water in the water tank, the water tank meets a certain temperature requirement, and then the first water tube is used for supplying hot water to the water using equipment.
Furthermore, the invention utilizes the first water pipe to supply hot water to the wax storage tank and the wax conveying pipe, so that the wax liquid in the wax storage tank and the wax conveying pipe can not be solidified, and the wax liquid can be normally supplied to the wax injector for use, thereby replacing the use of electric heating hot water to preserve the temperature of the wax liquid, further saving energy, reducing consumption, reducing production cost and being beneficial to long-term development of enterprises.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a waste heat recovery system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another view of the waste heat recovery system shown in fig. 1.
Reference numerals: 100-steam generator, 110-dewaxing kettle, 120-first air inlet pipe, 130-first gas collecting pipe, 140-water tank, 150-first heat exchange pipe, 160-first water pipe, 170-wax storage tank, 180-wax injector, 190-wax conveying pipe, 200-first spiral pipe part, 210-drain valve, 220-first return pipe, 230-second spiral pipe part, 240-body, 250-heat storage tank, 260-annular barrel, 270-first water inlet pipe, 280-first water supply pipe, 290-second heat exchange pipe, 300-second return pipe, 310-water pump, 320-heat preservation layer, 330-stainless steel pipe, 340-third return pipe, 350-overflow valve and 360-drain pipe.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
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.
A waste heat recovery system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a waste heat recovery system according to an embodiment of the present invention includes a steam generator 100, a first collecting device, a heat exchanging device, and a wax injection device.
Wherein the steam generator 100 is used for generating steam.
Therefore, in the wax melting process, the steam generator 100 is operated in the daytime, and the steam generated by the steam generator 100 is supplied to the wax melting process.
The first collecting device has a dewaxing kettle 110 for containing steam, a first gas inlet pipe 120 communicated with the dewaxing kettle 110, and a first gas collecting pipe 130 communicated with the dewaxing kettle 110, wherein the first gas inlet pipe 120 receives steam from the steam generator 100.
Therefore, after the dewaxing kettle 110 dewaxes the mold shell, the excessive steam enters the first gas collecting pipe 130, thereby collecting the excessive heat in the dewaxing, and reducing the heat waste.
The heat exchange device comprises a water tank 140, a first heat exchange tube 150 and a first water tube 160, wherein the water tank 140 is used for loading heat exchange water, the first heat exchange tube 150 is arranged in the water tank 140, the first heat exchange tube 150 is communicated with the first gas collecting tube 130, and the first water tube 160 is communicated with the water tank 140.
Thus, the first heat exchange pipe 150 receives the hot water of the first gas collecting pipe 130, so that the first heat exchange pipe 150 can heat the water in the water tank 140, so that the water in the water tank 140 reaches a certain temperature requirement, and then, the first water pipe 160 is used to supply the hot water to the water using device.
It will be appreciated that in some embodiments of the present invention, the first heat exchange tube 150 has a first spiral tube portion 200, and the first spiral tube portion 200 is located within the tank 140.
By providing the first heat exchange pipe 150 with the first spiral tube part 200, the first heat exchange pipe 150 having a spiral shape can be used, thereby increasing an area of the first heat exchange pipe 150 in contact with heat, and further, collecting waste heat of the steam generator 100 to the maximum.
In some embodiments of the present invention, the water tank 140 is provided with a temperature display.
Through making water tank 140 be provided with temperature monitor, temperature sensor in the water tank 140 can detect the hot water in the water tank 140, detects whether hydrothermal problem reaches the requirement, and temperature monitor can show the hot water temperature of water tank 140 in real time, makes things convenient for the operation personnel to monitor.
In some embodiments of the present invention, the water tank 140 is provided with an overflow valve 350, a drain 360 in communication with the overflow valve 350.
It can be understood that, through making the water tank 140 be provided with overflow valve 350 and drain pipe 360 to, hot water temperature in the water tank 140 is lower, does not reach the requirement, and overflow valve 350 opens for hot water is discharged from drain pipe 360, reduces the hot water of water tank 140, thereby, makes the hot water temperature in the water tank 140 rise rapidly, guarantees to supply hot water to wax storage tank 170 and defeated wax pipe 190 normally.
In some embodiments of the present invention, the first heat exchange pipe 150 is provided with a trap 210, a first return pipe 220 communicating with the trap 210, the first return pipe 220 communicating with the steam generator 100.
By providing the drain valve 210 and the first return pipe 220, after water is formed by cooling the steam in the first heat exchange pipe 150, the water can enter the first return pipe 220 through the drain valve 210, the returned water is utilized by the steam generator 100 again, and meanwhile, the steam cannot pass through the drain valve 210, so that the steam can be prevented from being discharged to the outside.
In some embodiments of the present invention, the sintering furnace further comprises a sintering furnace, a second collecting device and a second heat exchanging device, the sintering furnace comprises a body 240, a heat storage tank 250 arranged at one side of the body 240, and a hot gas pipe for communicating the body 240 and the heat storage tank, high-alumina balls are arranged in the heat storage tank 250 and used for absorbing heat from the body 240, the second collecting device comprises an annular barrel 260 sleeved on the heat storage tank 250, a first water inlet pipe 270 communicated with the annular barrel 260, and a first water supply pipe 280 communicated with the annular barrel 260, the annular barrel 260 contains heated water, the second heat exchanging device comprises a second heat exchanging pipe 290 arranged in the water barrel, and the second heat exchanging pipe 290 is communicated with the first water supply pipe 280.
Therefore, in the calcination process of the formwork, a sintering furnace is used, the sintering furnace works at night, the body 240 of the sintering furnace has hot air for supporting combustion, the hot air needs to reach the heat storage box 250 through a hot air pipe, and the high-alumina balls of the heat storage box 250 can absorb the excessive heat of the hot air.
Meanwhile, by providing the ring-shaped tub 260, water in the ring-shaped tub 260 can absorb heat emitted from the outer surface of the heat storage tank 250, thereby collecting surplus heat.
Secondly, the water in the ring-shaped barrel 260 is transported through the first water supply pipe 280 to be provided with the second heat exchange pipe 290, the second heat exchange pipe 290 heats the water in the water tank 140, that is, at night, the steam generator 100 stops working, the water in the water tank 140 can be heated, and the first water pipe 160 can supply hot water to the equipment, thereby being more beneficial to energy allocation of enterprises and reducing the production cost.
In some embodiments of the present invention, the outer surface of the ring-shaped tub 260 is provided with heat insulation cotton.
Rationally, through making annular bucket 260 surface be provided with thermal-insulated cotton, can reduce the hot water heat in the annular bucket 260 and give off, play the heat preservation effect.
In some embodiments of the present invention, a second return pipe 300 is disposed between the second heat exchanging pipe 290 and the first water inlet pipe 270, and the second return pipe 300 is provided with a water pump 310.
It can be understood that, by providing the second return pipe 300 and the water pump 310, the water pump 310 enables the water of the second heat exchanging pipe 290 to be reused and to enter the annular barrel 260 through the first water inlet pipe 270, so as to realize water circulation.
The wax injection device comprises a wax storage tank 170, a wax injection machine 180 and a wax conveying pipe 190 for communicating the wax storage tank 170 with the wax injection machine 180, wherein the wax storage tank 170 and the wax conveying pipe 190 are provided with a first water pipe 160.
Therefore, the hot water in the first water pipe 160 can supply heat to the wax storage tank 170 and the wax conveying pipe 190, and the temperature of the wax liquid can be maintained.
In some embodiments of the present invention, a third return line 340 is provided between the water tank 140 and the first water line 160.
By providing the third return pipe 340 between the water tank 140 and the first water pipe 160, the heat of the water in the first water pipe 160 is absorbed by the wax conveying pipe 190 and the wax storage tank 170, and then enters the water tank 140 through the third return pipe 340 to be heated again.
In some embodiments of the present invention, the wax conveying pipe 190 is covered with an insulating layer 320 and a stainless steel pipe 330 sleeved on the insulating layer 320.
Reasonably, through making wax conveying pipe 190 surface be provided with heat preservation 320, nonrust steel pipe 330, heat preservation 320 can keep warm to wax conveying pipe 190, reduces the heat and scatters and disappears, and simultaneously, nonrust steel pipe 330 can protect heat preservation 320 to, can play the supporting role.
In some embodiments of the present invention, the first water tube 160 has a second spiral tube part 230, and the second spiral tube part 230 extends along the inner wall of the wax storage tank 170.
It can be understood that, by providing the first water pipe 160 with the second spiral pipe part 230, the second spiral pipe part 230 can increase the contact with the wax storage tank 170, and can achieve a good heat preservation effect.
Thus, the present embodiment has the following effects:
firstly, the first collecting device is provided, so that the first collecting device has the dewaxing kettle 110, the first air inlet pipe 120 and the first air collecting pipe 130, steam of the steam generator 100 enters the dewaxing kettle 110 through the first air inlet pipe 120, and after the dewaxing kettle 110 dewaxes a product, redundant steam enters the first air collecting pipe 130, so that redundant heat in dewaxing can be collected, and heat waste is reduced.
Meanwhile, the present invention provides a heat exchange device having a water tank 140, a first heat exchange tube 150 and a first water tube 160, wherein the first heat exchange tube 150 receives hot water from the first gas collecting tube 130, so that the first heat exchange tube 150 heats water in the water tank 140 to meet a certain temperature requirement of the water tank 140, and then the first water tube 160 supplies hot water to a water consuming device.
Furthermore, the invention makes use of the first water pipe 160 to supply hot water to the wax storage tank 170 and the wax conveying pipe 190, so as to ensure that the wax liquid in the wax storage tank 170 and the wax conveying pipe 190 is not solidified, so that the wax liquid can be normally supplied to the wax injection machine 180 for use, thereby replacing the use of electric heating hot water to preserve heat of the wax liquid, further saving energy, reducing consumption, reducing production cost and being beneficial to long-term development of enterprises.
Thus, the present embodiment has the following effects:
firstly, the first collecting device is provided, so that the first collecting device has the dewaxing kettle 110, the first air inlet pipe 120 and the first air collecting pipe 130, the steam of the steam generator 100 enters the dewaxing kettle 110 through the first air inlet pipe 120, and after the shell of the mold is dewaxed by the dewaxing kettle 110, the redundant steam enters the first air collecting pipe 130, thereby collecting the redundant heat in dewaxing can be collected, and reducing the heat waste.
Meanwhile, the present invention provides a heat exchange device, which has a water tank 140, a first heat exchange tube 150 and a first water tube 160, wherein the first heat exchange tube 150 receives the steam of the first gas collecting tube 130, so that the first heat exchange tube 150 heats the water in the water tank 140, the water tank 140 reaches a certain temperature requirement, and then the first water tube 160 is used to supply hot water to the water consuming equipment.
Furthermore, the invention makes use of the first water pipe 160 to supply hot water to the wax storage tank 170 and the wax conveying pipe 190, so as to ensure that the wax liquid in the wax storage tank 170 and the wax conveying pipe 190 is not solidified, so that the wax liquid can be normally supplied to the wax injection machine 180 for use, thereby replacing the use of electric heating hot water to preserve heat of the wax liquid, further saving energy, reducing consumption, reducing production cost and being beneficial to long-term development of enterprises.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A waste heat recovery system, comprising:
a steam generator (100) for generating steam;
a first collecting device, which is provided with a dewaxing kettle (110) for containing steam, a first air inlet pipe (120) communicated with the dewaxing kettle (110), and a first air collecting pipe (130) communicated with the dewaxing kettle (110), wherein the first air inlet pipe (120) receives the steam from a steam generator (100);
the heat exchange device is provided with a water tank (140), a first heat exchange pipe (150) and a first water pipe (160), the water tank (140) is loaded with heat exchange water, the first heat exchange pipe (150) is arranged in the water tank (140), the first heat exchange pipe (150) is communicated with the first gas collecting pipe (130), and the first water pipe (160) is communicated with the water tank (140);
the wax injection device is provided with a wax storage tank (170), a wax injection machine (180) and a wax conveying pipe (190) for communicating the wax storage tank (170) with the wax injection machine (180), wherein the first water pipe (160) is arranged in the wax storage tank (170) and the wax conveying pipe (190).
2. A waste heat recovery system according to claim 1, wherein the first heat exchanging pipe (150) has a first spiral pipe portion (200), and the first spiral pipe portion (200) is located in the water tank (140).
3. A heat recovery system according to claim 1, characterized in that the first heat exchanging pipe (150) is provided with a trap (210), a first return pipe (220) communicating with the trap (210), the first return pipe (220) communicating with the steam generator (100).
4. A waste heat recovery system according to claim 1, wherein the first water pipe (160) has a second spiral pipe portion (230), the second spiral pipe portion (230) extending along the inner wall of the wax storage tank (170).
5. The waste heat recovery system of claim 1, further comprising a sintering furnace, a second collecting device and a second heat exchanging device, the sintering furnace is provided with a body (240), a heat storage box (250) arranged on one side of the body (240), and a hot gas pipe for communicating the body (240) and the heat storage box (250), the heat storage box (250) is internally provided with high-alumina balls for absorbing heat from the body (240), the second collecting device is provided with an annular barrel (260) sleeved on the heat storage box (250), a first water inlet pipe (270) communicated with the annular barrel (260), and a first water supply pipe (280) communicated with the annular barrel (260), the annular barrel (260) accommodates heated water, the second heat exchange device has a second heat exchange pipe (290) disposed at the water barrel, and the second heat exchange pipe (290) is communicated with a first water supply pipe (280).
6. A waste heat recovery system according to claim 5, characterized in that a second return pipe (300) is arranged between the second heat exchanging pipe (290) and the first water inlet pipe (270), and the second return pipe (300) is provided with a water pump (310).
7. A waste heat recovery system as claimed in claim 5, characterized in that the ring-shaped barrel (260) is externally provided with heat insulation cotton.
8. The waste heat recovery system according to claim 1, wherein the wax conveying pipe (190) is sleeved with an insulating layer (320), and a stainless steel pipe (330) sleeved on the insulating layer (320).
9. A waste heat recovery system according to claim 1, characterized in that a third return pipe (340) is arranged between the water tank (140) and the first water pipe (160).
10. A waste heat recovery system according to claim 1, characterized in that the water tank (140) is provided with an overflow valve (350), a drain (360) communicating with the overflow valve (350).
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| CN202210242167.3A CN115055640A (en) | 2022-03-11 | 2022-03-11 | Waste heat recovery system |
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| CN202210242167.3A CN115055640A (en) | 2022-03-11 | 2022-03-11 | Waste heat recovery system |
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