CN218407560U - Waste heat power generation system - Google Patents
Waste heat power generation system Download PDFInfo
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- CN218407560U CN218407560U CN202222964905.3U CN202222964905U CN218407560U CN 218407560 U CN218407560 U CN 218407560U CN 202222964905 U CN202222964905 U CN 202222964905U CN 218407560 U CN218407560 U CN 218407560U
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Abstract
The utility model discloses a waste heat power generation system relates to heat recovery system technical field. The waste heat power generation system comprises a heat exchange device, a screw expansion generator, a heat recovery device, a secondary condenser, a liquid storage tank and an electronic expansion valve which are sequentially communicated to form a loop; the utility model adopts two working mediums, wherein the working medium I is a waste heat working medium used in a factory, and the working medium II is a working medium used in the heat exchange process; after the working medium I is used, the waste heat can exchange heat with the working medium II, and the working medium I after heat exchange is continuously put into production for use; the working medium II is conveyed to the screw expansion generator through pressure difference formed by temperature rise, and power generation is performed by using the exchanged heat; the working medium II exchanges heat with cold water such as underground water and the like through a heat recovery device to obtain high-temperature water which can be applied to the aspects of heating and the like; and finally, the working medium II is cooled to be liquid through the secondary condenser and returns to the liquid storage tank for storage, and the liquid working medium II is heated through the secondary condenser and is recycled.
Description
Technical Field
The utility model relates to a heat recovery system technical field especially relates to a waste heat power generation system.
Background
At present, a large amount of energy consumption is required in various industrial production fields, heat energy which is not utilized in the production process is generated from various heat energy conversion devices, energy utilization devices and chemical reaction devices, and a large amount of various forms of waste heat is also generated in the production process.
The sources of the waste heat mainly include industrial exhaust waste heat, waste heat of high-temperature products and slag, waste heat of cooling media, waste heat generated in the chemical reaction process, combustible waste gas, waste materials, heat energy of waste liquid, waste steam and waste water, the average heat efficiency of the industrial boiler is only 67%, and the rest energy is discharged into the atmosphere through high-temperature waste flue gas, so that great waste is caused.
A large amount of waste heat which needs to be recycled exists in the industrial fields of textile printing and dyeing, electroplating processing, chemical pharmacy, printing and drying, coal slime drying, casting, electrolytic aluminum production and the like. If the energy can be fully utilized by recovery, the industrial energy loss can be greatly reduced, and meanwhile, the waste heat recovery and utilization is an important way for improving the economy and saving the fuel.
For example, chinese patent publication No. CN112983672A discloses a waste heat recovery system, which includes: the preheating barrel is provided with a coil pipe on the inner wall, and two ends of the coil pipe extend out of the preheating barrel; the concentration crystallization barrel is connected with the preheating barrel and is used for receiving the raw material liquid in the preheating barrel; one end of the steam-water separator is connected with the upper part of the concentration crystallization barrel through a pipeline, the steam-water separator collects steam evaporated from the concentration crystallization barrel and recovers condensed water in the steam, and the other end of the steam-water separator is connected with a coil air inlet of the preheating barrel through a pipeline and is used for guiding the steam into the coil; and the induced draft fan is connected with the air outlet of the coil pipe.
The waste heat recovery system mainly improves the utilization rate of steam heat, but in most factories, the temperature of a working medium is higher, the heat in the working medium is difficult to be fully replaced by only one-time heat exchange, and partial heat is dissipated along with the cooling of the working medium, so that the waste of heat is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned technical problem, overcome prior art's shortcoming, provide a waste heat power generation system.
In order to solve the technical problem, the utility model provides a waste heat power generation system.
The technical effects are as follows: the utility model discloses in adopt two kinds of working medium, working medium I is the waste heat working medium that uses in the mill, and working medium II is then the working medium that uses at the heat transfer in-process. After the working medium I is used, the waste heat can exchange heat with the working medium II, and the working medium I after heat exchange is continuously put into production for use; the working medium II can convey the heat after heat exchange to a screw expansion generator for power generation, and further utilizes the waste heat of the working medium; then, the working medium II used for power generation exchanges heat with cold water such as underground water and the like through a heat recovery device, and the obtained high-temperature water is applied to the aspects of heating and the like; and finally, the working medium II returns to the liquid storage tank for storage, and is conveyed to the heat exchange device through the secondary condenser for recycling. After heat exchange for many times, the waste heat of the working medium I can be fully used, and the waste of heat is greatly reduced.
The utility model discloses the technical scheme who further injects is: a waste heat power generation system comprises a heat exchange device which is sequentially communicated to form a loop, wherein a working medium I with waste heat and a gaseous working medium II circulate and are used for exchanging the waste heat of the working medium I to the working medium II, and the heat exchange device comprises a waste heat end inlet and a preheating end outlet which circulate the working medium I, and a working medium II inlet and a working medium II outlet which circulate and transmit the working medium II;
the screw expansion generator is communicated to the outlet of the working medium II so as to generate power by utilizing the heat of the heat-exchanged working medium II;
the heat recovery device is communicated with the screw expansion generator, and a working medium II used for power generation and cooling water flow through the heat recovery device and are used for realizing heat exchange between the working medium II and the cooling water;
the liquid storage tank is used for storing the liquefied working medium II, one end of the liquid storage tank is communicated to the heat recovery device, and the other end of the liquid storage tank outputs the working medium II;
the secondary condenser is positioned between the liquid storage tank and the heat exchange device, one side of the secondary condenser is communicated with the liquid storage tank through a working medium liquid return pipe, and the other side of the secondary condenser is provided with a gaseous working medium outlet used for outputting a gaseous working medium II and communicated with a working medium II inlet;
and the working medium II circulates in the loop through pressure difference generated by temperature change after heat exchange.
The waste heat power generation system is characterized in that an intermediate working medium pipe communicated with each other is arranged between the heat recovery device and the secondary condenser and used for conveying intermediate working medium II after heat exchange, the intermediate working medium pipe flows through the secondary condenser and then is communicated to the working medium liquid return pipe, and meanwhile, the heat recovery device is communicated to the working medium liquid return pipe and used for conveying liquid working medium II to the liquid storage tank.
The waste heat power generation system is characterized in that a liquid working medium liquid inlet pipe is arranged between the liquid storage tank and the secondary condenser and used for conveying a liquid working medium II to the secondary condenser, and an electronic expansion valve used for adjusting the liquid outlet amount of the working medium II in the liquid storage tank is arranged on the liquid working medium liquid inlet pipe.
The waste heat power generation system is characterized in that the heat recovery device is provided with a cooling water inlet and a cooling water outlet, and the cooling water is underground water.
The beneficial effects of the utility model are that:
(1) In the utility model, working medium I used in a factory firstly enters a heat exchange device to exchange heat with working medium II, after the working medium II is heated, the working medium I is continuously put into production for use, and the working medium II is exchanged to obtain most of waste heat of the working medium I; then the temperature of the working medium II is raised after heat exchange, pressure difference circulation is formed in the pipeline, the working medium II enters an expansion generator, power generation is carried out by utilizing heat energy, and the first utilization of waste heat is realized; then the working medium II enters a heat recovery device to exchange heat with cooling water, the cooling water at the position can use underground water, and the cooling water is used for heating and the like after being heated, so that the secondary heat exchange utilization of the waste heat of the working medium is realized, the full utilization of the waste heat of the working medium is ensured, and the waste of heat is reduced to the greatest extent;
(2) In the utility model, the working medium II discharged from the heat recovery device has two forms, one is liquid, the other is gas-liquid mixed intermediate state, the liquid working medium II can be directly led into the liquid storage tank through the working medium liquid return pipe for storage and reuse, the working medium II in the intermediate state needs to enter the secondary condenser, and is condensed into the liquid working medium II and then led into the liquid storage tank for storage through the working medium liquid return pipe;
(3) In the utility model, the liquid working medium II in the liquid storage tank flows into the second-stage condenser through the throttling action of the electronic expansion valve, the second-stage condenser heats the liquid working medium II to a gas state, and the gas working medium II enters the heat exchange device to exchange heat with the working medium I with waste heat, so that the cyclic utilization of the working medium II is ensured; the secondary condenser can carry out heat exchange and cooling on the refluxed intermediate working medium II on the one hand, and on the other hand, the secondary condenser can also use heat after heat exchange to heat the working medium II in the electronic expansion valve, so that the energy is saved.
(4) In the utility model, the waste heat after the working medium is used can exchange heat with the working medium II at first, and the waste heat is exchanged into the working medium II; secondly, the working medium II can be conveyed to a screw expansion generator by utilizing the pressure difference generated by the temperature change, and the waste heat of the working medium is utilized for generating electricity; then, the working medium II cooled to a certain degree exchanges heat with cold water such as underground water and the like through a heat recovery device, and the obtained high-temperature water can be applied to the aspects of heating and the like; this device can fully exchange the waste heat of working medium I who uses in the mill through the multistage heat transfer of working medium II, greatly reduced thermal waste.
Drawings
Fig. 1 is a schematic view of a connection structure of embodiment 1.
Wherein: 1. a heat exchange device; 11. a waste heat end inlet; 12. a working medium II outlet; 13. a working medium II is imported; 14. a pre-heating end outlet; 2. a screw expansion generator; 3. a heat recovery device; 31. a cooling water inlet; 32. a cooling water outlet; 4. a secondary condenser; 41. a working medium liquid return pipe; 42. a gaseous working medium outlet; 43. an intermediate working medium tube; 44. a liquid working medium inlet pipe; 45. an electronic expansion valve; 5. a liquid storage tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many other forms than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the one element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The structure of the waste heat power generation system provided by the embodiment is shown in fig. 1, and the waste heat power generation system comprises a heat exchange device 1, wherein a waste heat end inlet 11 and a preheating end outlet 14 which are communicated with each other are arranged in the heat exchange device 1, and a working medium I with waste heat used by a factory flows through the working medium I; the heat exchange device 1 is also provided with a working medium II inlet 13 and a working medium II outlet 12 which are communicated, wherein the working medium II for realizing the multi-stage heat exchange circulates.
Because the temperature of the working medium I with the waste heat after heating is higher, the working medium I can exchange heat with the working medium II, most of heat is transferred to the working medium II, the working medium I after heat exchange is finished continues to be put into cyclic utilization in a factory, and heat loss and waste are reduced.
As shown in fig. 1, a position of a working medium ii outlet 12 of the heat exchange device 1 is communicated with the screw expansion generator 2, the temperature of the working medium ii subjected to heat exchange changes, a pressure difference formed by the temperature change enters the screw expansion generator 2, and heat energy of the working medium ii is used as a power source to generate electricity, so that the first utilization of waste heat of the working medium i is realized, and energy waste is reduced.
As shown in fig. 1, a heat recovery device 3 is arranged outside the screw expansion generator 2, a working medium ii flows out of the screw expansion generator 2 and enters the heat recovery device 3 for heat exchange, and the heat recovery device 3 is provided with a cooling water inlet 31 and a cooling water outlet 32 which are communicated with each other, wherein cooling water flows through the heat recovery device, and the cooling water at the position can be underground water, so as to save cost; the working medium II exchanges heat with cooling water, the cooling water is heated into hot water, the hot water can be used for heating, washing and the like, and secondary utilization of waste heat of the working medium I is realized.
As shown in fig. 1, a secondary condenser 4 and a liquid storage tank 5 are arranged outside the heat recovery device 3, the heat recovery device 3 is communicated with the liquid storage tank 5 through a working medium liquid return pipe 41, and meanwhile, the secondary condenser 4 is also communicated with the working medium liquid return pipe 41. After the working medium II exchanges heat in the heat recovery device 3, a condensed liquid working medium II and a gas-liquid mixed intermediate working medium II are formed. The liquid working medium directly enters the liquid storage tank 5 through the working medium liquid return pipe 41 for storage.
The intermediate working medium II enters the secondary condenser 4 through an intermediate working medium pipe 43 arranged between the heat recovery device 3 and the secondary condenser 4, and the working medium II condensed by the secondary condenser 4 is changed into a liquid state again and returns to the liquid storage tank 5 for storage. Meanwhile, a liquid working medium liquid inlet pipe 44 is arranged between the liquid storage tank 5 and the secondary condenser 4 and used for conveying a liquid working medium II, and an electronic expansion valve 45 is arranged on the liquid working medium liquid inlet pipe 44. The liquid working medium II in the liquid storage tank 5 enters the secondary condenser 4 through the liquid working medium inlet pipe 44.
Gaseous working medium II is formed in the secondary condenser 4 and is conveyed to the working medium II inlet 13 of the heat exchange device 1 through the gaseous working medium outlet 42 on the secondary condenser 4, so that the cyclic utilization of the working medium II can be realized. The secondary condenser can exchange heat and cool the returned intermediate working medium II on the one hand, and can also heat the working medium II in the electronic expansion valve by using the heat after heat exchange on the other hand, so that the energy is saved.
The utility model discloses in, adopted two kinds of working mediums, working medium I is the waste heat working medium that uses in the mill, and working medium II is then the working medium that uses at the heat transfer in-process. After the working medium I is used, the waste heat can exchange heat with the working medium II, and the working medium I after heat exchange is continuously put into production for use; the working medium II is conveyed to the screw expansion generator through a pressure difference formed by temperature rise, power generation is carried out by using the exchanged heat, and further the waste heat of the working medium is utilized; then, the working medium II used for power generation exchanges heat with cold water such as underground water and the like through a heat recovery device, and the obtained high-temperature water is applied to the aspects of heating and the like; and finally, the working medium II returns to the liquid storage tank for storage, is heated into a gas state through the secondary condenser again, and is conveyed to the heat exchange device for recycling.
In the whole process, the working medium II is conveyed under the action of pressure difference generated by temperature change of the working medium II, and after twice heat exchange, the waste heat of the working medium I can be fully used, so that the waste of heat is greatly reduced.
In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.
Claims (4)
1. A cogeneration system, characterized in that: involving successive connections forming a circuit
The heat exchange device (1) is used for exchanging the waste heat of the working medium I to the working medium II by circulating the working medium I with the waste heat and the working medium II in a gaseous state, and the heat exchange device (1) comprises a waste heat end inlet (11) and a preheating end outlet (14) for circulating the working medium I, and a working medium II inlet (13) and a working medium II outlet (12) for circulating and transferring the working medium II;
the screw expansion generator (2) is communicated to the working medium II outlet (12) so as to generate power by utilizing the heat of the heat-exchanged working medium II;
the heat recovery device (3) is communicated to the screw expansion generator (2), and a working medium II used for power generation and cooling water flow through the heat recovery device (3) and are used for realizing heat exchange of the working medium II and the cooling water;
the liquid storage tank (5) is used for storing the liquefied working medium II, one end of the liquid storage tank (5) is communicated to the heat recovery device (3), and the other end of the liquid storage tank outputs the working medium II;
the secondary condenser (4) is positioned between the liquid storage tank (5) and the heat exchange device (1), one side of the secondary condenser (4) is communicated with the liquid storage tank (5) through a working medium liquid return pipe (41), and the other side of the secondary condenser is provided with a gaseous working medium outlet (42) for outputting a gaseous working medium II and is communicated with the working medium II inlet (13);
and the working medium II circulates in the loop through pressure difference generated by temperature change after heat exchange.
2. The cogeneration system of claim 1, wherein: the heat recovery device (3) and the secondary condenser (4) are provided with an intermediate working medium pipe (43) which is communicated with each other and used for conveying an intermediate working medium II after heat exchange, the intermediate working medium pipe (43) flows through the secondary condenser (4) and then is communicated to a working medium liquid return pipe (41), and meanwhile, the heat recovery device (3) is communicated to the working medium liquid return pipe (41) and used for conveying a liquid working medium II to the liquid storage tank (5).
3. The cogeneration system of claim 1, wherein: a liquid working medium liquid inlet pipe (44) is arranged between the liquid storage tank (5) and the secondary condenser (4) and used for conveying a liquid working medium II to the secondary condenser (4), and an electronic expansion valve (45) used for adjusting the liquid outlet amount of the working medium II in the liquid storage tank (5) is arranged on the liquid working medium liquid inlet pipe (44).
4. The cogeneration system of claim 1, wherein: the heat recovery device (3) is provided with a cooling water inlet (31) and a cooling water outlet (32), and the cooling water is underground water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222964905.3U CN218407560U (en) | 2022-11-03 | 2022-11-03 | Waste heat power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222964905.3U CN218407560U (en) | 2022-11-03 | 2022-11-03 | Waste heat power generation system |
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| Publication Number | Publication Date |
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| CN218407560U true CN218407560U (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222964905.3U Active CN218407560U (en) | 2022-11-03 | 2022-11-03 | Waste heat power generation system |
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| CN (1) | CN218407560U (en) |
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- 2022-11-03 CN CN202222964905.3U patent/CN218407560U/en active Active
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