CN216869235U - Production system for recycling hot water waste heat - Google Patents
Production system for recycling hot water waste heat Download PDFInfo
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- CN216869235U CN216869235U CN202123024962.5U CN202123024962U CN216869235U CN 216869235 U CN216869235 U CN 216869235U CN 202123024962 U CN202123024962 U CN 202123024962U CN 216869235 U CN216869235 U CN 216869235U
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Abstract
The utility model relates to a production system for recycling waste heat of hot water, which comprises a raw liquid tank for storing industrial hot water, a flash tank for vaporizing the industrial hot water into steam, a two-stage steam compressor for pressurizing and heating the steam output by the flash tank, and a demister for purifying the steam, wherein the output end of the raw liquid tank is connected with the first input end of the flash tank, the first output end of the flash tank is connected with the first input end of the demister, and the input end of the two-stage steam compressor is connected with the first output end of the demister. The heat of the industrial hot water is fully recycled, the enthalpy value of the steam passing through the production system is improved to a higher index, the temperature of the steam passing through the two-stage steam compressor is increased by more than 25 ℃, the utilization requirements of more enterprises are met, and the energy utilization rate is high; in addition, due to the arrangement of the structure, compared with the existing equipment/structure, the production system can reduce the cost by half and reduce the consumed power by half.
Description
Technical Field
The utility model relates to a production system for recycling hot water waste heat, which is suitable for high-energy-consumption enterprises such as steel mills, power plants and the like and enterprises which can generate a large amount of high-temperature hot water in fine chemical engineering, petroleum rectification and the like.
Background
The high-temperature water is available everywhere in production enterprises, especially high-energy consumption enterprises. High temperature water carries a large amount of heat energy, direct emission can cause a large amount of heat waste, reach the peak with the carbon of advocating today, the theory of carbon neutralization is obviously contradictory, the mode of consequently various high temperature water energy reuse takes place by oneself, wherein the most traditional mode is through simple plate-type or tubular heat exchanger to high temperature water and low-grade water heat transfer, the low-grade water after will rising temperature again is used for central heating heat supply, this kind of mode has consumed a large amount of water as the cold source, and has only utilized the sensible heat of high temperature water, energy utilization is lower. In addition, the structure of the flash tank and two vapor compressors connected in series as disclosed in CN202022306302.5 patent has a certain improvement in energy utilization, but the equipment cost and the operation energy consumption of the two vapor compressors are not small enough, and still the final objective of energy saving is considered.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a production system for recycling hot water waste heat, which solves the problem of low utilization rate when high-temperature water energy is recycled.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a production system for recycling waste heat of hot water, which comprises a raw liquid tank for storing industrial hot water, a flash tank for vaporizing the industrial hot water into steam, a two-stage steam compressor for pressurizing and heating the steam output by the flash tank, and a demister for purifying the steam, wherein the output end of the raw liquid tank is connected with the first input end of the flash tank, the first output end of the flash tank is connected with the first input end of the demister, and the input end of the two-stage steam compressor is connected with the first output end of the demister. The stock tank can be regarded as a transition mechanism of industrial hot water. The demister functions to separate liquid droplets entrained in the steam.
The mode that flash tank and doublestage vapor compressor establish ties makes the heat of industry hot water obtain abundant recovery, compares with the range that current steam rises 22 ℃ after the single-stage vapor compressor, and doublestage vapor compressor can improve the enthalpy value of steam to higher index, and steam rises more than 25 ℃ after the doublestage vapor compressor, satisfies the utilization demand of more enterprises, and energy utilization is high. Compared with the structure that the flash tank is connected with two vapor compressors in series, the structure that the flash tank is connected with one two-stage vapor compressor in series adopted by the production system can reduce nearly half cost and reduce nearly half consumed power. The price of 1t/h steam produced by the production system is about 35 yuan, which is equivalent to 1/10 of energy consumption for producing the same amount of steam by using natural gas, the saturated steam price is about 230 yuan/ton, the cost of each ton of steam per hour is saved by about 200 yuan, and the cost of one year is saved by about 170 ten thousand.
Further, a liquid inlet pump for pumping the industrial hot water in the stock solution tank into the flash tank is arranged between the stock solution tank and the flash tank.
Further, the production system also comprises a liquid loading pump which is connected with the double-stage steam compressor and used for discharging volute liquid loading generated by the double-stage steam compressor. The volute is a device used for collecting and guiding gas leaving the impeller, accumulated liquid is trace liquid drops carried in steam entering the two-stage steam compressor or liquid drops condensed when the compressor stops and the steam in the pipeline and the volute meets cold, if the accumulated liquid cannot be removed in time, the accumulated liquid can impact the impeller under the action of high-speed rotation to damage the impeller, and the compressor cannot work on the steam to achieve the expected effect.
Further, the production system also comprises a first loop for returning water removed by the demister purified steam to the flash tank, and the input end and the output end of the first loop are respectively connected with a second output end of the demister and a second input end of the flash tank. The function of the first loop is to return entrained water droplets in the vapor exiting the flash tank back to the flash tank to maximize the assurance that the vapor entering the dual-stage vapor compressor is saturated.
Further, the production system further comprises a second loop for pumping the secondary industrial hot water remaining after passing through the flash tank back to the flash tank again to make full use of the heat of the secondary industrial hot water. The secondary industrial hot water is defined as hot water separated by vaporization of the flash tank, and the input end and the output end of the second loop are respectively connected with the second output end of the flash tank and the second input end of the flash tank.
Furthermore, the second circuit is provided with a liquid outlet pump for pumping secondary industrial hot water.
Furthermore, the second loop also comprises a sub-loop for pumping the secondary industrial hot water to the secondary industrial hot water storage tank, the input end of the sub-loop is connected between the output end of the liquid outlet pump and the second input end of the flash tank, and the output end of the sub-loop is connected with the input end of the secondary industrial hot water storage tank.
Further, the production system also comprises a third loop for pumping the industrial hot water and the secondary industrial hot water to the temporary liquid storage tank, and the requirements of shutdown maintenance and cleaning of the production system are met. The input end of the third loop is connected with the output end of the stock solution tank and the second loop, and the output end of the third loop is connected with the input end of the temporary liquid storage tank.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the heat of the industrial hot water is fully recycled, the enthalpy value of the steam passing through the production system is improved to a higher index, the temperature of the steam passing through the two-stage steam compressor is increased by more than 25 ℃, the utilization requirements of more enterprises are met, and the energy utilization rate is high; in addition, due to the arrangement of the structure, compared with the existing equipment/structure, the production system can reduce the cost by half and reduce the consumed power by half.
Drawings
Some specific embodiments of the utility model will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of a two-stage vapor compressor production system for recycling waste heat of high-temperature water according to the present invention.
Wherein the reference numerals are as follows:
1. a stock solution tank; 2. a flash tank; 3. a two-stage vapor compressor; 4. a demister; 5. a liquid inlet pump; 6. a liquid accumulation pump; 7. a first circuit; 8. a second loop; 9. a liquid outlet pump; 10. a secondary industrial hot water storage tank; 11. a sub-loop; 12. a temporary liquid storage tank; 13. a third loop.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to the attached drawing 1, the two-stage vapor compressor 3 production system for recycling waste heat of high-temperature water in the embodiment includes a raw liquid tank 1, a flash tank 2, a demister 4, and a two-stage vapor compressor 3, where the raw liquid tank 1 is used for storing industrial hot water and can also be regarded as a transition mechanism of the industrial hot water. The flash tank 2 is used for vaporizing the industrial hot water into steam, and a first input end of the flash tank 2 is connected with an output end of the raw liquid tank 1. The demister 4 is used for purifying steam and separating liquid drops entrained in the steam, and a first input end of the demister 4 is connected with a first output end of the flash tank 2. The two-stage vapor compressor 3 is used for pressurizing and heating the steam output by the flash tank 2, the first output end of the demister 4 is connected with the input end of the two-stage vapor compressor 3, and the output end of the two-stage vapor compressor 3 is provided with an output pipeline (not shown in the attached drawings).
The mode that flash tank 2 and doublestage vapor compressor 3 establish ties makes the heat of industry hot water obtain abundant recovery, compares with the range that current steam rises 22 ℃ after the single stage vapor compressor, and doublestage vapor compressor 3 can improve the enthalpy value of steam to higher index, and steam rises more than 25 ℃ through 3 back temperature elevations of doublestage vapor compressor, satisfies more enterprises' utilization demand, and energy utilization is high. Compared with the structure that the flash tank 2 is connected with two vapor compressors in series, the structure that the flash tank 2 is connected with one two-stage vapor compressor 3 in series adopted by the production system can reduce nearly half cost and reduce nearly half consumed power. The price of 1t/h steam produced by the production system is about 35 yuan, which is equivalent to 1/10 of energy consumption for producing the same amount of steam by using natural gas, the saturated steam price is about 230 yuan/ton, the cost of each ton of steam per hour is saved by about 200 yuan, and the cost of one year is saved by about 170 ten thousand.
Preferably, a liquid inlet pump 5 for pumping the industrial hot water in the raw liquid tank 1 into the flash tank 2 is arranged between the raw liquid tank 1 and the flash tank 2.
Preferably, the production system further comprises a effusion pump 6 connected to the dual-stage vapor compressor 3 for discharging a volute effusion produced by the dual-stage vapor compressor 3. The volute is a device for collecting and guiding gas leaving the impeller, accumulated liquid is trace liquid drops carried in steam entering the two-stage steam compressor 3 or liquid drops condensed when the pipeline and the volute meet cold when the compressor stops, if the accumulated liquid cannot be removed in time, the accumulated liquid can impact the impeller under the action of high-speed rotation to damage the impeller, and the compressor cannot work on the steam to achieve the expected effect. Preferably, the production system further comprises a first circuit 7, the first circuit 7 being adapted to return water removed by the demister 4 when purifying the steam to the flash tank 2. The input end and the output end of the first loop 7 are respectively connected with the second output end of the demister 4 and the second input end of the flash tank 2. The function of the primary loop 7 is to return entrained water droplets in the steam exiting the flash tank 2 back to the flash tank 2 to ensure to the maximum extent that the steam entering the dual stage vapor compressor 3 is saturated steam.
Preferably, the production system further comprises a second circuit 8 and a sub-circuit 11, the second circuit 8 being adapted to re-pump the secondary industrial hot water remaining after passing through the flash tank 2 back to the flash tank 2, the sub-circuit 11 being adapted to pump the secondary industrial hot water to the secondary industrial hot water storage tank 10. The input end and the output end of the second loop 8 are respectively connected with the second output end of the flash tank 2 and the second input end of the flash tank 2, and a liquid outlet pump 9 for pumping secondary industrial hot water is arranged between the input end and the output end of the second loop 8. The input end of the sub-loop 11 is connected between the output end of the liquid outlet pump 9 and the second input end of the flash tank 2, and the output end of the sub-loop 11 is connected with the input end of the secondary industrial hot water storage tank 10. The secondary industrial hot water is defined as hot water separated by vaporization by the flash tank 2.
Preferably, the production system further comprises a third loop 13 for pumping the industrial hot water and the secondary industrial hot water to the temporary storage tank 12, so as to meet the requirements of shutdown, overhaul and cleaning of the production system. The input end of the third loop 13 is connected with the output end of the raw liquid tank 1 and the second loop 8, and the output end of the third loop 13 is connected with the input end of the temporary liquid tank 12.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the utility model, and not to limit the scope of the utility model, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (8)
1. The production system for recycling the waste heat of the hot water is characterized by comprising a raw liquid tank (1) for storing the industrial hot water, a flash tank (2) for vaporizing the industrial hot water into steam, a two-stage steam compressor (3) for pressurizing and heating the steam output by the flash tank (2), and a demister (4) for purifying the steam, wherein the output end of the raw liquid tank (1) is connected with the first input end of the flash tank (2), the first output end of the flash tank (2) is connected with the first input end of the demister (4), and the input end of the two-stage steam compressor (3) is connected with the first output end of the demister (4).
2. The production system for recycling waste heat of hot water as claimed in claim 1, wherein a liquid inlet pump (5) for pumping the industrial hot water in the raw liquid tank (1) into the flash tank (2) is arranged between the raw liquid tank (1) and the flash tank (2).
3. The production system for recycling waste heat of hot water as claimed in claim 1, further comprising a liquid loading pump (6) connected to the two-stage vapor compressor (3) for discharging liquid loading in the volute of the two-stage vapor compressor (3).
4. A hot water waste heat recovery and reuse production system according to claim 1, further comprising a first loop (7) for returning water removed by the demister (4) purifying steam to the flash tank (2), wherein an input end and an output end of the first loop (7) are respectively connected with a second output end of the demister (4) and a second input end of the flash tank (2).
5. A hot water waste heat recovery and reuse production system according to claim 1, characterized in that said production system further comprises a second loop (8) for pumping back the secondary industrial hot water remaining after passing through said flash tank (2) to the flash tank (2) again, said secondary industrial hot water being defined as hot water separated by vaporization of the flash tank (2), and an input and an output of said second loop (8) are connected to a second output of said flash tank (2) and a second input of the flash tank (2), respectively.
6. A hot water residual heat recovery and reuse production system according to claim 5, characterized in that said second circuit (8) has a liquid outlet pump (9) therein for pumping said secondary industrial hot water.
7. A hot water waste heat recovery and reuse production system according to claim 6, characterized in that said second loop (8) further comprises a sub-loop (11) for pumping said secondary industrial hot water to a secondary industrial hot water storage tank (10), an input of said sub-loop (11) is connected between an output of the liquid pump and a second input of the flash tank (2), and an output of said sub-loop (11) is connected to an input of the secondary industrial hot water storage tank (10).
8. The production system for recycling waste heat of hot water as claimed in claim 5, further comprising a third loop (13) for pumping the industrial hot water and the secondary industrial hot water to the temporary liquid storage tank (12), wherein the input end of the third loop (13) is connected with the output end of the raw liquid tank (1) and the second loop (8), and the output end of the third loop (13) is connected with the input end of the temporary liquid storage tank (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123024962.5U CN216869235U (en) | 2021-12-03 | 2021-12-03 | Production system for recycling hot water waste heat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123024962.5U CN216869235U (en) | 2021-12-03 | 2021-12-03 | Production system for recycling hot water waste heat |
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| CN216869235U true CN216869235U (en) | 2022-07-01 |
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| CN202123024962.5U Active CN216869235U (en) | 2021-12-03 | 2021-12-03 | Production system for recycling hot water waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11725858B1 (en) * | 2022-03-08 | 2023-08-15 | Bechtel Energy Technologies & Solutions, Inc. | Systems and methods for regenerative ejector-based cooling cycles |
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2021
- 2021-12-03 CN CN202123024962.5U patent/CN216869235U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11725858B1 (en) * | 2022-03-08 | 2023-08-15 | Bechtel Energy Technologies & Solutions, Inc. | Systems and methods for regenerative ejector-based cooling cycles |
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