CN107628661B - Multi-effect rotary wiped film type distillation desalting device - Google Patents
Multi-effect rotary wiped film type distillation desalting device Download PDFInfo
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- CN107628661B CN107628661B CN201710944641.6A CN201710944641A CN107628661B CN 107628661 B CN107628661 B CN 107628661B CN 201710944641 A CN201710944641 A CN 201710944641A CN 107628661 B CN107628661 B CN 107628661B
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- Y02A20/124—Water desalination
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Abstract
The invention relates to a multi-effect rotary wiped film distillation desalination device, which comprises a plurality of evaporator units with the same structure, wherein each evaporator unit adopts a series operation process, each evaporator unit is driven by the same motor to operate, the evaporator units adopt a rotary wiped film distillation desalination mode, a rotary hollow disc and a relatively static wiping brush are arranged in each evaporator unit, a uniform thin liquid film is formed by utilizing a tiny gap between the wiping brush and the surface of the hollow disc, the thin liquid film is heated and evaporated on the surface of the hollow disc to generate steam, and the formed steam is condensed in a mode of heating raw material seawater for heat exchange to form fresh water. The invention adopts a rotary film scraping type evaporation mode, reduces heat transfer resistance at the evaporation side, improves evaporation efficiency, can remove dirt formed by seawater evaporation in time by using the scraping brush, ensures high-efficiency and stable operation of the device, realizes the reutilization of steam heat energy by using a multi-effect distillation process, and improves the economical efficiency of the operation of the device.
Description
Technical Field
The invention belongs to the technical field of seawater desalination and water treatment, and particularly relates to a multi-effect rotary wiped film distillation desalination device.
Background
The energy-saving and anti-fouling process is an important development direction of the existing distillation seawater desalination technology. In order to realize process energy saving, a large-scale distillation seawater desalination plant generally adopts a multi-effect distillation process, namely, phase change heat transfer is generated on two sides of a heat transfer surface, heating steam is condensed into fresh water, seawater is heated and evaporated to generate secondary steam, the secondary steam enters a next-effect evaporator under the action of pressure difference, and the evaporation and condensation process is repeated, so that the heat energy utilization rate of the heating steam can be improved, and the water generation ratio of a distillation desalination device is improved. In order to realize the stable operation of the multi-effect distillation process, the device also has to overcome the scaling problem of the heat transfer surface of the seawater in the evaporation process, remove the crystal components such as calcium, magnesium and the like precipitated by the evaporation of the seawater in time and avoid the continuous attenuation of the heat transfer efficiency caused by the deposition of a scale layer on the heat transfer surface. Based on the reasons, the invention is urgently needed to provide the multi-effect distillation and desalination device with the online descaling capacity, the energy consumption of the distillation and desalination process is reduced, the reliable and stable operation of the distillation and desalination device is ensured, and the device has important significance for promoting the development of related technologies such as seawater distillation and desalination, zero sewage discharge and the like.
Disclosure of Invention
The invention aims to provide a multi-effect rotary wiped film distillation desalination device aiming at the defects of the prior art.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a multi-effect rotary wiped film distillation desalination device comprises a device shell, a plurality of evaporator units with the same structure are installed in the device shell in series, a unit shell of each evaporator unit is fixedly installed with the device shell, a motor is fixedly installed on one side outside the device shell, a small gear is fixedly installed at the right end of a motor shaft and meshed with a large gear on the upper portion, a long shaft penetrates through the middle of the large gear, penetrates through the device shell to extend leftwards after passing through a positioning bearing installed on the inner side wall of the device shell, a long shaft support is fixedly installed at the position, corresponding to the left end portion of the long shaft, inside the device shell, an end bearing is fixedly installed on the long shaft support, the left end of the long shaft is fixed on an end bearing inner sleeve, a plurality of small belt rotating wheels are sequentially arranged on the long shaft from left to right, each small belt rotating wheel is connected with a large belt pulley corresponding to the, a belt pulley shaft is arranged in the middle of each large belt pulley, the belt pulley shaft penetrates into the unit shell through a right sealing bearing in the middle of the right side of the unit shell to drive the internal mechanism of the evaporator unit to rotate, a left sealing bearing is arranged in the middle of the left side unit shell of each evaporator unit, a hollow fixing shaft with two closed ends is fixedly arranged in the left sealing bearing in a penetrating manner, a steam inlet connecting pipe, a noncondensable steam extracting pipe and a fresh water collecting pipe are respectively and fixedly sealed on the left side end surface of the hollow fixing shaft, a concentrated water recovery header pipe and a feeding liquid header pipe are respectively and hermetically arranged at the lower part of the left side unit shell of each evaporator unit in a penetrating manner, a steam-liquid separator is arranged in the right side unit shell of each evaporator unit, a steam outlet connecting pipe penetrating through the side wall of the unit shell is arranged on the steam-liquid separator, and the, discharging noncondensable gas in each evaporator unit to atmosphere, collecting fresh water in each evaporator unit, penetrating out of a device shell, conveying the fresh water to a fresh water tank through a fresh water pump after collecting fresh water collecting pipes, connecting a steam inlet pipe to provide steam for forming condensed water for each evaporator unit, connecting a steam outlet pipe of the evaporator unit at the leftmost end with a steam inlet pipe of the adjacent evaporator unit at the right side by a pipeline, repeating the steps, connecting the steam outlet pipe of the evaporator unit at the rightmost side with an external compressor through a pipeline, heating and boosting the steam by the compressor, returning the steam to the steam inlet pipe of the evaporator unit at the leftmost side through a pipeline, collecting the concentrated water recovery header pipes of the evaporator units, penetrating out of the device shell, connecting the concentrated water recovery header pipes with a concentrated water pump pipeline, connecting the concentrated water pump with a feeding liquid tank through a pipeline with a valve, and connecting the feeding liquid tank with a raw material water pump through a pipeline, receiving raw material seawater, and on the other hand, conveying feed liquid from a feed liquid tank to a feed liquid main pipe of each evaporator unit through a pipeline and a feed water pump to provide raw material water for generating steam for each evaporator unit;
the evaporator unit has an internal structure that after a belt pulley shaft penetrates through a unit shell, the left end of the belt pulley shaft is coaxially and fixedly connected with the right side face of a hollow disc in the evaporator unit, the left side face of the hollow disc is coaxially and fixedly connected with a hollow sleeve extending leftwards, the left end of the hollow sleeve is positioned and installed with an inner sleeve of a left sealing bearing, a concentrated water recovery cover with a central hole is coaxially installed at the outer edge of the hollow disc through a jackscrew, and the belt pulley shaft drives the hollow disc, the concentrated water recovery cover and the hollow sleeve to coaxially rotate;
the hollow fixed shaft fixedly arranged in the left sealing bearing in a penetrating mode and the unit shell are kept fixed relatively, a sliding bearing for ensuring relative rotation between the hollow fixed shaft and the inner wall of the hollow sleeve is coaxially arranged between the hollow fixed shaft and the inner wall of the hollow sleeve, the right end of the hollow fixed shaft is inserted into the hollow disc cavity, steam outlets are formed in the upper side and the lower side of the hollow fixed shaft at the center of the hollow disc, the noncondensing gas extraction pipe and the fresh water collection pipe fixedly arranged on the left end face of the hollow fixed shaft penetrate through the hollow fixed shaft and then extend to the upper edge and the lower edge of the hollow disc cavity through the steam outlets in the upper side and the lower side respectively, and steam input by the;
the lower side wall in the unit shell is provided with a concave water supply and drainage support, two ends of the water supply and drainage support extend along two sides of the disc surface of the concentrated water recovery cover and are bent to enter a central hole of the concentrated water recovery cover and then continue to extend to the outer edge of the hollow disc along two sides of the disc surface of the hollow disc, a scraping brush is arranged at the position of the water supply and drainage support corresponding to the disc surface of the hollow disc, a feed liquid main pipe penetrated and entered from the lower part of the unit shell enters the unit shell and then is divided into two feed liquid branch pipes along two ends of the water supply and drainage support, the two feed liquid branch pipes penetrate through the central hole of the concentrated water recovery cover and then are arranged in parallel with the scraping brush, a plurality of transfusion holes facing the disc surface of the hollow disc are arranged at intervals on the feed liquid branch pipes corresponding to the scraping brush position, the concentrated water recovery main pipe penetrated and entered from the lower part of, the two concentrated water recovery branch pipes penetrate through the central hole of the concentrated water recovery cover and are arranged in parallel with the feed liquid branch pipes, and the opening ends of the concentrated water recovery branch pipes extend to the edge of the concentrated water recovery cover.
And, dense water recovery cover includes left cover dish and right cover dish, and left and right cover dish is through a plurality of bolt fixed connection of wearing the dress along the edge, simultaneously, has added the sealing washer at the combination edge terminal surface of left and right cover dish.
And the scraping brush is made of silica gel, a gap is reserved between the scraping brush and the evaporation surface of the hollow disc, and the gap distance is kept between 50 and 100 mu m.
Further, the inside of the unit case is maintained in a negative pressure state by evacuation.
And the seawater evaporation temperature of each evaporator unit is sequentially decreased by 2 ℃ from left to right, so that an inter-effect temperature difference is formed.
The invention has the advantages and positive effects that:
1. the rotary wiped film evaporator is adopted, seawater forms a thin liquid film by utilizing a small gap between the wiping brush and the rotary table, the heat transfer resistance of the evaporation side is reduced, the evaporation efficiency is improved, and simultaneously dirt formed by seawater evaporation can be removed in time by utilizing the wiping brush, so that the efficient and stable operation of the device is ensured.
2. The invention adopts a multi-effect distillation process to connect the rotary wiped film evaporators in each effect in series for operation, and secondary steam generated by seawater evaporation can be used as a heating source of the evaporator in the next effect, thereby realizing the reutilization of steam heat energy and improving the economical efficiency of the operation of the device.
3. The invention adopts a motor to provide a rotary power source for each effect evaporator through the long shaft, and the transmission system ensures that the rotating speeds of the rotating discs of each effect evaporator are kept consistent while simplifying the equipment configuration, thereby ensuring the stability of film formation during the film scraping evaporation of each effect.
4. According to the invention, each effect evaporator operates under negative pressure and low temperature, the highest first-effect evaporation temperature is controlled within 50 ℃, the temperature difference between the effects is kept within 2 ℃, the process parameters can reduce the scale formation in seawater to the maximum extent, and simultaneously, the reduction of the operation energy consumption of a compressor is facilitated.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the structure of each evaporator unit of the apparatus of the present invention.
Detailed Description
The present invention will be further described with reference to the following drawings, which are illustrative, not restrictive, and the scope of the invention is not limited thereto.
A multi-effect rotary wiped film distillation desalination device is shown in figure 1 and comprises a device shell 1, a plurality of evaporator units with the same structure are installed in the device shell in series, a unit shell 2 of each evaporator unit is fixedly installed with the device shell, a motor 15 is fixedly installed on one side outside the device shell, a pinion 14 is fixedly installed at the right end of a motor shaft 13, the pinion is meshed with a gearwheel 10 on the upper portion, a long shaft 11 penetrates through the middle of the gearwheel, the long shaft penetrates into the device shell to extend leftwards after passing through a positioning bearing 12 installed on the inner side wall of the device shell, a long shaft bracket 18 is fixedly installed in the device shell at a position corresponding to the left end of the long shaft, an end bearing 19 is fixedly installed on the long shaft bracket, the left end of the long shaft is fixed on an end bearing inner sleeve, a plurality of small belt rotating wheels 16 are sequentially arranged on the long shaft from left to right, each small belt rotating wheel is connected with a large belt pulley 5 corresponding to, a belt pulley shaft 4 is arranged in the middle of a large belt pulley of each evaporator unit, the belt pulley shaft penetrates into the unit shell through a right sealing bearing 7 in the middle of the right side of the unit shell to drive the internal mechanism of the evaporator unit to rotate, a left sealing bearing 8 is arranged in the middle of the left side unit shell of each evaporator unit, a hollow fixed shaft 32 with two closed ends is fixedly arranged in the left sealing bearing in a penetrating way, a steam inlet connecting pipe 30, a noncondensable steam extraction pipe 31 and a fresh water collecting pipe 29 are respectively and fixedly sealed on the left end surface of the hollow fixed shaft, a concentrated water recovery header pipe 27 and a feeding liquid header pipe 28 are respectively and fixedly arranged on the lower part of the left side unit shell of each evaporator unit in a penetrating way, a steam-liquid separator 9 is arranged in the right side unit shell of each evaporator unit, a steam outlet connecting pipe 3 penetrating through the side wall of the unit shell is arranged on the steam-liquid separator, the noncondensable steam extraction, the noncondensable gas in each evaporator unit is discharged to the atmosphere, the fresh water collecting pipes of each evaporator unit penetrate out of the device shell after being collected in the device shell through pipelines, the fresh water is conveyed into a fresh water tank 25 through a fresh water pump 24, the steam inlets are connected for providing secondary steam for forming condensed water for each evaporator unit, the steam outlet connecting pipe of the evaporator unit at the leftmost end is connected with the steam inlet connecting pipe of the adjacent right evaporator unit, the process is repeated, the steam outlet connecting pipe at the rightmost side is connected with a compressor 17 outside the device shell through a pipeline, the steam is heated and pressurized by the compressor and then returns to the steam inlet connecting pipe of the evaporator unit at the leftmost side through a pipeline, the concentrated water recovery header pipe of each evaporator unit penetrates out of the device shell after being collected in the device shell through the pipelines, the concentrated water pump 21 is connected with a pipeline, and the concentrated water pump is connected with a feed liquid tank 22 through a pipeline with, the feed liquid tank is connected with a raw material water pump 23 through a pipeline to receive raw material seawater, and on the other hand, the feed liquid tank conveys feed liquid to a feed liquid main pipe of each evaporator unit through a pipeline and a feed water pump 20 to provide raw material water for generating primary steam for each evaporator unit;
as shown in fig. 2, the evaporator unit has an internal structure that after the pulley shaft penetrates into the unit shell, the left end of the pulley shaft is coaxially and fixedly connected with the right side surface of a hollow disc 42 in the evaporator unit, the left side surface of the hollow disc is coaxially and fixedly connected with a hollow sleeve 40 extending leftwards, the left end of the hollow sleeve is positioned and installed with an inner sleeve of the left sealing bearing, a concentrated water recovery cover 33 with a central hole is coaxially installed at the outer edge of the hollow disc through a jackscrew 37, and the pulley shaft drives the hollow disc, the concentrated water recovery cover and the hollow sleeve to coaxially rotate;
the hollow fixed shaft fixedly penetrated in the left sealing bearing and the unit shell are relatively fixed, a sliding bearing 41 for ensuring the relative rotation between the hollow fixed shaft and the inner wall of the hollow sleeve is coaxially arranged between the hollow fixed shaft and the inner wall of the hollow sleeve, the right end of the hollow fixed shaft is inserted into the cavity of the hollow disc, the upper side and the lower side of the hollow fixed shaft at the center of the hollow disc are provided with steam outlets 34, the noncondensable gas pumping pipe and the fresh water collecting pipe which are fixedly arranged on the left end surface of the hollow fixed shaft penetrate into the hollow fixed shaft and then respectively extend to the upper edge and the lower edge of the hollow disc cavity through the steam outlets at the upper side and the lower side, the secondary steam input by the steam inlet connecting pipe is discharged into the hollow disc cavity through the steam outlets at the upper side and the lower side after passing through the hollow fixed, condensed water is formed on the side wall of the hollow disc after heat exchange, the condensed water is discharged by the fresh water collecting pipe, and noncondensable gas is discharged by the noncondensable gas pipe;
the lower side wall in the unit shell is provided with a concave water supply and drainage support, two ends 39 of the water supply and drainage support extend along two sides of the disc surface of the concentrated water recovery cover and are bent to enter a central hole of the concentrated water recovery cover and then continue to extend to the outer edge of the hollow disc along two sides of the disc surface of the hollow disc, a scraping brush 38 is arranged at the position of the water supply and drainage support corresponding to the disc surface of the hollow disc, a feed liquid main pipe penetrated and arranged from the lower part of the unit shell enters the unit shell and then is divided into two feed liquid branch pipes 35 along two ends of the water supply and drainage support, the two feed liquid branch pipes penetrate through the central hole of the concentrated water recovery cover and then are arranged in parallel with the scraping brush, a plurality of transfusion holes facing the disc surface of the hollow disc are arranged at intervals on the feed liquid branch pipes corresponding to the scraping brush position, the concentrated water recovery main pipe penetrated and entering from the lower part of the, the two concentrated water recovery branch pipes penetrate through the central hole of the concentrated water recovery cover and are arranged in parallel with the feed liquid branch pipes, and the opening ends of the concentrated water recovery branch pipes extend to the edge of the concentrated water recovery cover.
In the specific implementation of the invention, the concentrated water recovery cover comprises a left cover disc and a right cover disc, wherein the left cover disc and the right cover disc are fixedly connected through a plurality of bolts 43 which are arranged along the edge in a penetrating way, meanwhile, a sealing ring is added on the end surface of the joint edge of the left cover disc and the right cover disc, a hollow sleeve, a sliding bearing, a hollow fixed shaft and a water supply and drainage support are pre-inserted into the left cover disc from a central hole, a belt wheel shaft 1 and the water supply and drainage support are pre-inserted into the right cover disc from the central hole, the left cover disc and the right cover disc are fastened and connected through a bolt pressing sealing ring, and the outer edge of the concentrated water recovery cover is pressed and fixed with the hollow disc through a jackscrew, so that the concentrated water recovery.
In the specific implementation of the invention, the scraping brush is made of silica gel and has an L-shaped structure, a gap is reserved between the scraping brush and the evaporation surface of the hollow disc, and the gap distance is kept between 50 and 100 mu m.
In the specific implementation of the invention, the hollow disc and the concentrated water recovery cover are both made of titanium plates with the wall thickness of 1mm, and the hollow fixed shaft is made of a titanium tube with the wall thickness of 2 mm.
In the specific implementation of the invention, the rated rotating speed of the motor is 1000r/min, the reduction ratios of the small belt pulley and the large belt pulley and the small gear and the large gear are both 2: 1.
in the specific implementation of the invention, the device shell and the unit shell are both made of titanium plates with the wall thickness of 4mm, and the interior of the unit shell is kept in a negative pressure state through vacuum pumping.
As a specific example of the invention, the seawater evaporation temperature of each evaporator unit is decreased by 2 ℃ from left to right, the seawater evaporation temperature of the first-effect evaporator unit at the leftmost end is set to be 50 ℃, the steam temperature generated by the evaporator unit at the tail end of the rightmost end is 44 ℃, and the temperature difference between the steam inlet and the steam outlet of the compressor is 6 ℃.
Principle of operation
Seawater is conveyed to the outer surfaces of two sides of the hollow disc through the feeding liquid main pipe and the feeding liquid branch pipe, a thin liquid film is formed in a tiny gap between the scraping brush and the hollow disc, the thin liquid film is heated and evaporated on the outer surface of the hollow disc to generate steam, the steam enters a unit shell of the evaporator unit through a central hole of the concentrated water recovery cover, the steam flows into a next-effect evaporator unit through the steam outlet connecting pipe after passing through the steam-liquid separator under the action of effect pressure difference, non-evaporated concentrated water is sputtered into the concentrated water recovery cover on the outside under the action of centrifugal force, and the concentrated water flows to the outside of the rotary membrane scraping type evaporator through the concentrated water recovery branch pipe and the concentrated water recovery. Heating steam enters the hollow fixed shaft through the steam inlet connecting pipe and then enters the inner cavity of the hollow disc through the steam outlets on the upper side and the lower side of the hollow fixed shaft, the heating steam is condensed into fresh water on the inner surface of the hollow disc, the fresh water is gathered at the inner edge of the hollow disc under the action of centrifugal force and is absorbed and discharged to the outside of the rotary wiped film evaporator through the fresh water collecting pipe. And the noncondensable gas in the cavity of the hollow disc is exhausted to the outside of the rotary wiped film evaporator through the noncondensable gas pumping pipe, so that the distillation and desalination process of the rotary wiped film evaporator is finished.
Claims (5)
1. A multi-effect rotary wiped film distillation desalination device is characterized in that: the evaporator comprises a device shell, a plurality of evaporator units with the same structure are installed in the device shell in series, a unit shell of each evaporator unit is fixedly installed with the device shell, a motor is fixedly installed on one side outside the device shell, a small gear is fixedly installed at the right end of a motor shaft and meshed with a large gear on the upper portion, a long shaft penetrates through the middle of the large gear, penetrates through the device shell to extend leftwards after passing through a positioning bearing installed on the inner side wall of the device shell, a long shaft bracket is fixedly installed at a position corresponding to the left end of the long shaft in the device shell, an end bearing is fixedly installed on the long shaft bracket, the left end of the long shaft is fixed on an end bearing inner sleeve, a plurality of small belt rotating wheels are sequentially arranged on the long shaft from left to right, each small belt rotating wheel is connected with a large belt pulley corresponding to the evaporator unit through a belt, a belt wheel shaft, the belt pulley shaft penetrates into the unit shell through a right sealing bearing in the middle of the right side of the unit shell to drive the internal mechanism of the evaporator unit to rotate, a left sealing bearing is arranged in the middle of the left unit shell of each evaporator unit, a hollow fixing shaft with two closed ends is fixedly arranged in the left sealing bearing in a penetrating manner, a steam inlet connecting pipe, a noncondensable gas pumping pipe and a fresh water collecting pipe are fixedly arranged on the left end face of the hollow fixing shaft in a sealing manner respectively, a concentrated water recovery header pipe and a feeding liquid header pipe are respectively arranged at the lower part of the left unit shell of each evaporator unit in a penetrating manner in a sealing manner, a steam-liquid separator is arranged in the right unit shell of each evaporator unit, a steam outlet penetrating through the side wall of the unit shell is arranged on the steam-liquid separator, the noncondensable gas pumping pipes of each evaporator unit are converged and then penetrate out of the device shell to be, the fresh water collecting pipes of the evaporator units are gathered and then penetrate out of the shell of the device to convey fresh water into a fresh water tank through a fresh water pump, the steam inlets are connected with pipes to provide steam for forming condensed water for the evaporator units, the steam outlet connecting pipe of the evaporator unit at the leftmost end is connected with the steam inlet connecting pipe of the adjacent evaporator unit at the right side through a pipeline, the process is repeated, the steam outlet connecting pipe of the evaporator unit at the rightmost side is connected with an external compressor through a pipeline, the steam is heated and boosted by the compressor and then returns to the steam inlet connecting pipe of the evaporator unit at the leftmost side through a pipeline, the concentrated water recovering main pipe of each evaporator unit is gathered and then penetrates out of the shell of the device to be connected with a concentrated water pump pipeline, the concentrated water pump is connected with a feed liquid tank through a pipeline with a valve, the feed liquid tank is connected with a raw material water pump through a pipeline to receive raw material seawater, and the feed liquid tank conveys feed, providing raw water for steam generation to each evaporator unit;
the evaporator unit has an internal structure that after a belt pulley shaft penetrates through a unit shell, the left end of the belt pulley shaft is coaxially and fixedly connected with the right side face of a hollow disc in the evaporator unit, the left side face of the hollow disc is coaxially and fixedly connected with a hollow sleeve extending leftwards, the left end of the hollow sleeve is positioned and installed with an inner sleeve of a left sealing bearing, a concentrated water recovery cover with a central hole is coaxially installed at the outer edge of the hollow disc through a jackscrew, and the belt pulley shaft drives the hollow disc, the concentrated water recovery cover and the hollow sleeve to coaxially rotate;
the hollow fixed shaft fixedly arranged in the left sealing bearing in a penetrating mode and the unit shell are kept fixed relatively, a sliding bearing for ensuring relative rotation between the hollow fixed shaft and the inner wall of the hollow sleeve is coaxially arranged between the hollow fixed shaft and the inner wall of the hollow sleeve, the right end of the hollow fixed shaft is inserted into the hollow disc cavity, steam outlets are formed in the upper side and the lower side of the hollow fixed shaft at the center of the hollow disc, the noncondensing gas extraction pipe and the fresh water collection pipe fixedly arranged on the left end face of the hollow fixed shaft penetrate through the hollow fixed shaft and then extend to the upper edge and the lower edge of the hollow disc cavity through the steam outlets in the upper side and the lower side respectively, and steam input by the;
the lower side wall in the unit shell is provided with a concave water supply and drainage support, two ends of the water supply and drainage support extend along two sides of the disc surface of the concentrated water recovery cover and are bent to enter a central hole of the concentrated water recovery cover and then continue to extend to the outer edge of the hollow disc along two sides of the disc surface of the hollow disc, a scraping brush is arranged at the position of the water supply and drainage support corresponding to the disc surface of the hollow disc, a feed liquid main pipe penetrated and entered from the lower part of the unit shell enters the unit shell and then is divided into two feed liquid branch pipes along two ends of the water supply and drainage support, the two feed liquid branch pipes penetrate through the central hole of the concentrated water recovery cover and then are arranged in parallel with the scraping brush, a plurality of transfusion holes facing the disc surface of the hollow disc are arranged at intervals on the feed liquid branch pipes corresponding to the scraping brush position, the concentrated water recovery main pipe penetrated and entered from the lower part of, the two concentrated water recovery branch pipes penetrate through the central hole of the concentrated water recovery cover and are arranged in parallel with the feed liquid branch pipes, and the opening ends of the concentrated water recovery branch pipes extend to the edge of the concentrated water recovery cover.
2. The multi-effect rotary wiped film distillation desalination plant of claim 1, wherein: the concentrated water recovery cover comprises a left cover disc and a right cover disc, the left cover disc and the right cover disc are fixedly connected through a plurality of bolts penetrating along the edge, and meanwhile, a sealing ring is added on the end face of the combined edge of the left cover disc and the right cover disc.
3. The multi-effect rotary wiped film distillation desalination plant of claim 1, wherein: the scraping brush is made of silica gel, a gap is reserved between the scraping brush and the evaporation surface of the hollow disc, and the gap distance is kept between 50 and 100 mu m.
4. The multi-effect rotary wiped film distillation desalination plant of claim 1, wherein: the inside of the unit shell is kept in a negative pressure state through vacuumizing.
5. The multi-effect rotary wiped film distillation desalination plant of claim 1, wherein: the seawater evaporation temperature of each evaporator unit is sequentially decreased by 2 ℃ from left to right, and an inter-effect temperature difference is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944641.6A CN107628661B (en) | 2017-10-12 | 2017-10-12 | Multi-effect rotary wiped film type distillation desalting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944641.6A CN107628661B (en) | 2017-10-12 | 2017-10-12 | Multi-effect rotary wiped film type distillation desalting device |
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| Publication Number | Publication Date |
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| CN107628661A CN107628661A (en) | 2018-01-26 |
| CN107628661B true CN107628661B (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710944641.6A Active CN107628661B (en) | 2017-10-12 | 2017-10-12 | Multi-effect rotary wiped film type distillation desalting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114426612A (en) * | 2020-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Ethylene-vinyl alcohol copolymer production device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3764483A (en) * | 1970-10-05 | 1973-10-09 | B Tleimat | Rotating disk still with a hydrodynamically applied thin film |
| CN2139846Y (en) * | 1992-12-01 | 1993-08-11 | 沈善明 | Turntable evaporate concentrate machine |
| US5409576A (en) * | 1993-07-16 | 1995-04-25 | Tleimat; Badawi | Rotating evaporator device for the distillation or concentration of liquids |
-
2017
- 2017-10-12 CN CN201710944641.6A patent/CN107628661B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3764483A (en) * | 1970-10-05 | 1973-10-09 | B Tleimat | Rotating disk still with a hydrodynamically applied thin film |
| CN2139846Y (en) * | 1992-12-01 | 1993-08-11 | 沈善明 | Turntable evaporate concentrate machine |
| US5409576A (en) * | 1993-07-16 | 1995-04-25 | Tleimat; Badawi | Rotating evaporator device for the distillation or concentration of liquids |
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| CN107628661A (en) | 2018-01-26 |
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