CN218821099U - Dirty waste water waste heat recovery device of multistage coupling - Google Patents
Dirty waste water waste heat recovery device of multistage coupling Download PDFInfo
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- CN218821099U CN218821099U CN202223494009.1U CN202223494009U CN218821099U CN 218821099 U CN218821099 U CN 218821099U CN 202223494009 U CN202223494009 U CN 202223494009U CN 218821099 U CN218821099 U CN 218821099U
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Abstract
A multi-stage coupling sewage waste water waste heat recovery device belongs to the technical field of energy conservation and environment protection. The utility model provides a current high contaminated waste water waste heat recovery device can't satisfy the problem that hot quality promotes and high-efficient heat transfer requires simultaneously. The flash chamber and the condensation chamber are communicated through a steam channel at the top, the top end of the flash chamber is communicated with a sewage inlet pipe, the sewage inlet pipe in each heat exchange device is communicated with the bottom end of the flash chamber of the heat exchange device above the flash chamber, when N =2, the second heated water outlet is connected with the first heated water inlet through a water pipeline, when N >2, the second heated water outlet positioned below is connected with the second heated water inlet above the second heated water outlet in series, and the second heated water outlet positioned at the top is connected with the first heated water inlet through a water pipeline. Hot water with higher heat quality and meeting the process requirements can be generated, and gradient and efficient utilization of waste heat can be realized in a three-effect flash evaporation mode.
Description
Technical Field
The utility model relates to a dirty waste water waste heat recovery device of multistage coupling belongs to energy-conserving ring what technical field.
Background
At the present stage, a large amount of waste heat of high-pollution wastewater is generated in industrial production, but the waste heat cannot be directly used in the traditional dividing wall type heat exchanger due to complex components, serious corrosion and frequent blockage; meanwhile, due to the fact that the heat quality is medium, if equipment such as a traditional heat pump is adopted for improving the heat quality, the efficiency is low, and the operation cost is high. Based on the two reasons, the waste heat recovery device for the high-pollution wastewater at the present stage cannot meet the requirements of heat quality and high-efficiency heat exchange at the same time.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a solve the problem that current high pollution waste water waste heat recovery device can't satisfy hot quality promotion and high-efficient heat transfer requirement simultaneously, and then provide a dirty waste water waste heat recovery device of multistage coupling.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
a multi-stage coupling waste water waste heat recovery device comprises a condenser, a compressor, a throttle valve and N heat exchange devices which are sequentially arranged from top to bottom, wherein N is larger than or equal to 2, each heat exchange device is internally provided with a flash evaporation chamber and a condensation chamber, the flash evaporation chamber and the condensation chamber are communicated and arranged through a steam channel at the top, the top end of the flash evaporation chamber is communicated and provided with a waste water inlet pipe, the waste water inlet pipe in each heat exchange device is communicated and arranged with the bottom end of the flash evaporation chamber of the heat exchange device above the waste water inlet pipe, each heat exchange device is connected with a vacuum pump,
the condenser is provided with a first heated water inlet, a first heated water outlet, a first working medium inlet and a first working medium outlet in a communicating way, the condensing chamber in the Nth heat exchange device is provided with a second working medium inlet and a second working medium outlet in a communicating way, the condensing chambers in the first to the Nth heat exchange devices from top to bottom are respectively connected with a second heated water inlet and a second heated water outlet,
the first working medium outlet is connected with the second working medium inlet through a first working medium pipeline, the first working medium inlet is connected with the second working medium outlet through a second working medium pipeline, the throttle valve is arranged on the first working medium pipeline, the compressor is arranged on the second working medium pipeline,
when N =2, the second heated water outlet is connected with the first heated water inlet through a water pipeline,
when N >2, the second heated water outlet at the lower part is connected in series to the second heated water inlet at the upper part, and the second heated water outlet at the uppermost part is connected with the first heated water inlet through a water pipeline.
Further, a demister is arranged in each flash chamber.
Further, a sewage and wastewater water returning pump is communicated with the bottom end of the flash evaporation chamber of the Nth heat exchange device.
Furthermore, the bottoms of the condensing chambers of the N heat exchange devices are respectively connected with the same condensed water pump through pipelines.
Furthermore, the bottoms of the condensing chambers of the N heat exchange devices are respectively connected with N condensed water pumps in a one-to-one correspondence mode through pipelines.
Furthermore, the N heat exchange devices are respectively connected with the same vacuum pump through pipelines.
Furthermore, N heat exchange devices are respectively connected with N vacuum pumps in a one-to-one correspondence mode through pipelines.
Further, the number of the heat exchange devices is three.
Furthermore, in the N heat exchange devices, heated water enters tube passes of the first to the (N-1) th condensing chambers, and working medium enters the tube pass of the Nth condensing chamber.
Furthermore, in the condenser, heated water enters a tube pass, and working medium enters a shell pass.
Compared with the prior art, the utility model has the following effect:
by the waste heat recovery device, corrosion and blockage of medium-temperature waste liquid can be effectively avoided, waste heat of high-pollution waste water is recovered in a cleaning flash evaporation mode, and hot water with higher heat quality and meeting technological requirements can be generated; meanwhile, gradient and efficient utilization of waste heat can be realized in a triple-effect flash evaporation mode, compared with the traditional compression heat pump technology, the COP (coefficient of performance) of the traditional compression heat pump is not lower than 9.5 (COP is about 4.5), and the operation cost is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present application.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, which is a multi-stage coupling waste water waste heat recovery device, including a condenser 1, a compressor 2, a throttle valve 3, and N heat exchange devices 4 sequentially arranged from top to bottom, where N is ≧ 2, each heat exchange device 4 is provided with a flash chamber 41 and a condensation chamber 42, the flash chamber 41 and the condensation chamber 42 are communicated through a steam channel at the top, the top end of the flash chamber 41 is communicated with a waste water inlet pipe 43, the waste water inlet pipe 43 of each heat exchange device 4 is communicated with the bottom end of the flash chamber 41 of the heat exchange device 4 above the flash chamber, each heat exchange device 4 is connected with a vacuum pump 5,
the condenser 1 is provided with a first heated water inlet, a first heated water outlet, a first working medium inlet and a first working medium outlet in a communicating way, the condensing chamber 42 in the Nth heat exchange device 4 is provided with a second working medium inlet and a second working medium outlet in a communicating way, the condensing chambers 42 in the first to the Nth heat exchange devices 4 from top to bottom are respectively connected with a second heated water inlet and a second heated water outlet,
the first working medium outlet is connected with the second working medium inlet through a first working medium pipeline 6, the first working medium inlet is connected with the second working medium outlet through a second working medium pipeline 7, the throttle valve 3 is arranged on the first working medium pipeline 6, the compressor 2 is arranged on the second working medium pipeline 7,
when N =2, the second heated water outlet is connected with the first heated water inlet through a water pipeline,
when N >2, the second heated water outlet at the lower part is connected in series to the second heated water inlet at the upper part, and the second heated water outlet at the uppermost part is connected with the first heated water inlet through a water pipeline.
One heat exchange device 4 is used as a part of the heat pump to realize final-stage heat extraction, and the other heat exchange devices 4 realize direct heat exchange before final-stage heat extraction. The number of the heat exchange devices 4 for realizing direct heat exchange can be a plurality of, preferably three, so as to realize step heat exchange.
The every two adjacent heat transfer devices 4 from top to bottom are communicated with each other through a sewage and wastewater inlet pipe 43, sewage and wastewater after flash evaporation in the heat transfer devices 4 at the upper part enters the heat transfer devices 4 at the lower part through the sewage and wastewater inlet pipe 43 in the heat transfer devices 4 at the lower part, and then the flash evaporation at the lower part is carried out.
The condensing chamber 42 is internally provided with a condenser to realize condensation heat exchange, and the type of the condenser is not limited.
The flash evaporation chamber 41 realizes the flash evaporation of the sewage and the wastewater through a vacuum environment controlled by a vacuum system.
The high-pollution waste water waste heat that produces in this application adoption industrial production and the municipal works is graded high-pollution waste water waste heat gradient through multistage flash distillation equipment, furthest's utilization waste heat. The main flow is illustrated by taking three-stage flash evaporation as an example:
1. high-pollution wastewater system flow:
1, high-pollution wastewater firstly enters an uppermost flash chamber 41, first-effect flash evaporation is carried out under a vacuum environment controlled by a vacuum pump 5, clean steam is generated to serve as a heat-carrying medium and enters an uppermost first-effect condensation chamber 42, heat with relatively high quality is transferred to heated water passing through a second effect through the first-effect condensation chamber 42, and an efficient and clean heat exchange process is realized;
2, the high-pollution waste water enters the second-effect flash chamber 41 below through the waste water inlet pipe 43, the working area has a lower pressure than the first effect, in the vacuum system, the high-pollution waste water is evaporated again at a low pressure, the heat-carrying clean steam with medium heat quality generated in the part enters the second-effect condensation chamber 42, the heat is transferred to the low-temperature section of the heated water through the second-effect condensation chamber 42, and the high-efficiency and clean heat exchange process is realized;
3 after the second-effect flash evaporation, the high-pollution wastewater flows into the third-effect flash evaporation chamber 41 through the wastewater inlet pipe 43, the flash evaporation is also carried out in the space with lower pressure, and the heat of the heat-carrying steam with lower heat quality of the heat quality relative to the two effects is transferred to the refrigerant side working medium of the heat quality lifting system through the third-effect condensation chamber 42;
after the three stages, the highly polluted wastewater returns through the wastewater-discharging pump 8.
2. The vacuum system flow: the vacuum pump 5 is arranged on the vacuum main pipe, and the three-effect flash evaporation pressure is respectively controlled through the three branch pipes, or the three-effect flash evaporation pressure can be respectively controlled through the three vacuum pumps 5;
3. and (3) a condensed water flow: condensed water generated by the triple effect condensation chamber 42 is gathered to a condensed water main pipe through three branch pipes and is conveyed out of the system through the condensed water pumps 9, and the condensed water generated by the triple effect condensation chamber 42 can also be respectively conveyed through the three condensed water pumps 9;
4. the thermal quality improving system flow comprises the following steps: after passing through the third-effect condensing chamber 42, the refrigerant (i.e., working medium) absorbs the condensation heat of the heat-carrying steam flashed out by the third effect and then evaporates, then passes through the compressor 2 to increase the enthalpy and pressure of the refrigerant, then passes through the condenser 1 to carry out condensation heat exchange, transfers high-quality heat to heated water, reduces the pressure by the expansion valve (i.e., throttle valve 3), enters the third-effect condensing chamber 42 to absorb the heat of the heat-carrying steam flashed by the third effect, and continues the next cycle.
5. Flow of a heated water system: heated water firstly enters the second effect condensation chamber 42 from a second heated water inlet of the second effect condensation chamber 42, the heated water absorbs heat of heat-carrying flash steam of the second effect flash chamber 41 through the second effect condensation chamber 42 to be heated preliminarily, then enters the first effect condensation chamber 42 to absorb heat of the first effect flash heat-carrying steam, the middle section of the heated water is preheated, and then enters the condenser 1 through the first heated water inlet to enter a heat quality improving stage, the temperature is greatly improved after the heated water enters the condenser 1 to absorb heat of refrigerant in a heat quality improving system, and the heated water enters a process water system through the first heated water outlet.
By the waste heat recovery device, corrosion and blockage of medium-temperature waste liquid can be effectively avoided, waste heat of high-pollution waste water is recovered in a cleaning flash evaporation mode, and hot water with higher heat quality and meeting technological requirements can be generated; meanwhile, gradient and efficient utilization of waste heat can be realized in a triple-effect flash evaporation mode, compared with the traditional compression heat pump technology, the COP of the heat pump is not lower than 9.5 (COP of the traditional compression heat pump is about 4.5), and the operation cost is greatly reduced.
A demister 44 is provided in each flash chamber 41. So designed, through setting up the defroster in order to get rid of the droplet that carries in the flash steam.
The bottom end of the flash chamber 41 of the Nth heat exchange device 4 is communicated with a sewage and wastewater return pump 8. So design, through setting up dirty waste water outlet pump so that the dirty waste water discharge in the heat transfer device.
The bottoms of the condensation chambers 42 of the N heat exchange devices 4 are respectively connected with the same condensation water pump 9 through pipelines, or the bottoms of the condensation chambers 42 of the N heat exchange devices 4 are respectively connected with the N condensation water pumps 9 through pipelines in a one-to-one correspondence manner.
The N heat exchange devices 4 are respectively connected with the same vacuum pump 5 through pipelines, or the N heat exchange devices 4 are respectively connected with the N vacuum pumps 5 in a one-to-one correspondence manner through pipelines.
In the N heat exchange devices 4, heated water enters tube passes of the first to the N-1 th condensing chambers 42, and working medium enters the tube pass of the Nth condensing chamber 42.
In the condenser 1, heated water enters a tube pass, and a working medium enters a shell pass.
Claims (10)
1. The utility model provides a dirty waste water waste heat recovery device of multistage coupling which characterized in that: comprises a condenser (1), a compressor (2), a throttle valve (3) and N heat exchange devices (4) which are sequentially arranged from top to bottom, wherein N is not less than 2, each heat exchange device (4) is internally provided with a flash chamber (41) and a condensation chamber (42), the flash chamber (41) is communicated with the condensation chamber (42) through a steam channel at the top, the top end of the flash chamber (41) is communicated with a sewage and wastewater inlet pipe (43), the sewage and wastewater inlet pipe (43) in each heat exchange device (4) is communicated with the bottom end of the flash chamber (41) of the heat exchange device (4) above the same, and each heat exchange device (4) is connected with a vacuum pump (5),
a first heated water inlet, a first heated water outlet, a first working medium inlet and a first working medium outlet are communicated and arranged on the condenser (1), a second working medium inlet and a second working medium outlet are communicated and arranged on a condensing chamber (42) in the Nth heat exchange device (4), the condensing chambers (42) in the first to the Nth heat exchange devices (4) from top to bottom are respectively connected with a second heated water inlet and a second heated water outlet,
the first working medium outlet is connected with the second working medium inlet through a first working medium pipeline (6), the first working medium inlet is connected with the second working medium outlet through a second working medium pipeline (7), the throttling valve (3) is arranged on the first working medium pipeline (6), the compressor (2) is arranged on the second working medium pipeline (7),
when N =2, the second heated water outlet is connected with the first heated water inlet through a water pipeline,
when N is greater than 2, the second heated water outlet at the lower part is connected in series with the second heated water inlet at the upper part, and the second heated water outlet at the uppermost part is connected with the first heated water inlet through a water pipeline.
2. The multi-stage coupling sewage waste water waste heat recovery device according to claim 1, characterized in that: a demister (44) is arranged in each flash chamber (41).
3. The multi-stage coupling sewage waste water waste heat recovery device according to claim 1, characterized in that: the bottom end of the flash chamber (41) of the Nth heat exchange device (4) is communicated with a sewage and wastewater return pump (8).
4. The multi-stage coupling sewage waste water waste heat recovery device according to claim 1, 2 or 3, characterized in that: the bottoms of the condensing chambers (42) of the N heat exchange devices (4) are respectively connected with the same condensed water pump (9) through pipelines.
5. The multi-stage coupling sewage waste water waste heat recovery device according to claim 1, 2 or 3, characterized in that: the bottoms of the condensing chambers (42) of the N heat exchange devices (4) are respectively connected with N condensed water pumps (9) in a one-to-one correspondence mode through pipelines.
6. The multi-stage coupling sewage waste water waste heat recovery device according to claim 1, 2 or 3, characterized in that: the N heat exchange devices (4) are respectively connected with the same vacuum pump (5) through pipelines.
7. The multi-stage coupling sewage waste water waste heat recovery device according to claim 1, 2 or 3, characterized in that: the N heat exchange devices (4) are respectively connected with the N vacuum pumps (5) in a one-to-one correspondence mode through pipelines.
8. The multi-stage coupling sewage waste water waste heat recovery device according to claim 1, 2 or 3, characterized in that: the number of the heat exchange devices (4) is three.
9. The multi-stage coupling sewage waste water waste heat recovery device according to claim 1, 2 or 3, characterized in that: in the N heat exchange devices (4), heated water enters tube passes of the first to the N-1 th condensing chambers (42), and working medium enters the tube pass of the N condensing chamber (42).
10. The multi-stage coupling sewage waste water waste heat recovery device according to claim 9, characterized in that: in the condenser (1), heated water enters a tube pass, and working medium enters a shell pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223494009.1U CN218821099U (en) | 2022-12-27 | 2022-12-27 | Dirty waste water waste heat recovery device of multistage coupling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223494009.1U CN218821099U (en) | 2022-12-27 | 2022-12-27 | Dirty waste water waste heat recovery device of multistage coupling |
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| CN218821099U true CN218821099U (en) | 2023-04-07 |
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| CN202223494009.1U Active CN218821099U (en) | 2022-12-27 | 2022-12-27 | Dirty waste water waste heat recovery device of multistage coupling |
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