CN214528225U - Multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste water - Google Patents
Multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste water Download PDFInfo
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- CN214528225U CN214528225U CN202120285535.3U CN202120285535U CN214528225U CN 214528225 U CN214528225 U CN 214528225U CN 202120285535 U CN202120285535 U CN 202120285535U CN 214528225 U CN214528225 U CN 214528225U
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Abstract
A multi-medium flash evaporation device based on simultaneous utilization of multiple kinds of hot waste water belongs to the technical field of hot waste water recycling. The utility model provides a current flash distillation device can't realize carrying out the problem that the flash distillation utilized to multiple medium simultaneously. The heat exchanger comprises a heat exchanger and a plurality of flash evaporators, wherein the tops of the flash evaporators are communicated with the bottom of the heat exchanger, a plurality of media are subjected to flash evaporation through the flash evaporators, and the steam after flash evaporation upwards enters the heat exchanger to exchange heat and then is discharged. Through setting up a heat exchanger of a plurality of flash vessel simultaneous connections, flash evaporation when can realizing multiple hot waste water evaporates, compares with the mode that needs handle multiple hot waste water respectively through setting up a plurality of flash distillation plant among the prior art, effectively reduces heat recovery's cost, has reduced flash distillation plant's area.
Description
Technical Field
The utility model relates to a multimedium flash distillation device based on multiple hot waste water utilizes simultaneously belongs to hot waste water recycle technical field.
Background
A large amount of process wastewater, cooling water, waste washing water, equipment and site washing water are discharged in chemical production of chemical plants. Since chemical reactions are usually carried out at high temperature, the temperature of the waste water is generally high, and after the heat energy of the discharged high-temperature waste water is discharged into a water area, the heat pollution of the water body can be caused, so that the dissolved oxygen in the water is reduced, and the living conditions of aquatic organisms are damaged. In recent years, a plurality of manufacturers recover heat energy of high-temperature wastewater to heat buildings, so that the effects of energy conservation and emission reduction are achieved, but new problems are brought.
Two heat exchange methods are currently used for extracting heat energy from hot waste water:
1, a dividing wall type heat exchanger is utilized. The method is simple, convenient and easy to implement, and can be used for heating the building by utilizing various dividing wall type heat exchangers and utilizing hot waste water to heat heating circulating water. However, the conventional dividing wall type heat exchanger is rapidly out of service because the hot waste water is highly corrosive and easy to scale.
2, utilizing a flash evaporation device. When the flash distillation device among the prior art is adopted to carry out the flash distillation, because of flash distillation device's structural constraint, every flash distillation device can only satisfy the flash distillation of a medium, when needs carry out heat recovery to multiple hot waste water simultaneously and utilize, need set up a plurality of flash distillation devices respectively, so just can lead to heat recovery to utilize the cost too high, and a plurality of flash distillation device area is great.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a solve the unable problem that realizes carrying out the flash distillation utilization simultaneously to multiple medium of current flash distillation plant, and then provide a multimedium flash distillation plant based on multiple hot waste water utilizes simultaneously.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
the utility model provides a multimedium flash distillation device based on multiple hot waste water utilizes simultaneously, it includes collection vapour main part and a plurality of flash vessel, collection vapour main part includes the barrel and sets up the defroster in the barrel, the defroster level is laid at the middle part of barrel, and the top of a plurality of flash vessels all sets up with the bottom intercommunication of barrel, and a plurality of kinds of medium correspondence carries out the flash distillation through a plurality of flash vessels, and steam after the flash distillation upwards gets into in the collection vapour main part.
Further, the steam collection main body further comprises a heat exchange tube and a condensate tray which are arranged in the cylinder, wherein the heat exchange tube is horizontally arranged on the upper portion of the cylinder, the condensate tray is horizontally arranged between the heat exchange tube and the demister, and a water inlet and a water outlet of the heat exchange tube penetrate through the cylinder and are communicated with external heat users respectively.
Furthermore, a back washing device is arranged in the steam collection main body and comprises a back washing water inlet pipe and a plurality of spray heads which are arranged in a matrix manner along the horizontal direction, and the back washing water inlet pipe is communicated with the spray heads through a pipe network.
Further, a plurality of spray heads are arranged between the condensate tray and the demister.
Further, the defroster is flat structure, and is located same horizontal plane with the axle center of barrel, and the both sides of defroster all with the inner wall rigid coupling of barrel, the length of defroster is the same with the length of barrel.
Furthermore, semicircular baffles are vertically and fixedly arranged at the lower parts of the two ends of the barrel respectively, the plane ends of the baffles are fixedly connected with the demister, and the arc ends of the baffles are fixedly connected with the inner wall of the lower part of the barrel.
Furthermore, the two ends of the cylinder body are respectively provided with a sealing head, one sealing head is communicated with a condensed water outlet pipe, and one end of the condensed water disc, which is close to the condensed water outlet pipe, extends into the sealing heads and is provided with an opening.
Furthermore, a guide plate is connected to one end, close to the condensed water outlet pipe, of the condensed water tray, and the guide plate is arranged vertically or obliquely downwards.
Furthermore, the condensed water tray is obliquely arranged, and the low-level end of the condensed water tray is close to one side of the condensed water outlet pipe.
Further, the flash evaporator comprises a flash evaporator main body, a flash evaporation water inlet pipe and a flash evaporation water outlet pipe, the flash evaporation water inlet pipe is communicated with the upper portion of the flash evaporator main body, the flash evaporation water outlet pipe is communicated with the bottom of the flash evaporator main body, a second water inlet valve is arranged on the flash evaporation water inlet pipe, and a drain valve is arranged on the flash evaporation water outlet pipe.
Compared with the prior art, the utility model has the following effect:
through setting up a collection vapour main part of a plurality of flash vessel simultaneous connections, flash evaporation when can realizing multiple hot waste water evaporates, and the steam that the evaporation produced collects the utilization through collection vapour main part, compares with the mode that needs retrieve multiple waste water waste heat respectively or handle multiple hot waste water through setting up a plurality of flash distillation units among the prior art, effectively reduces the cost of heat recovery and waste water treatment, has reduced flash distillation unit's area.
Drawings
FIG. 1 is a schematic front view of the present application;
FIG. 2 is a side semi-sectional view of the steam collection body.
Detailed Description
The first embodiment is as follows: this embodiment is explained in connection with fig. 1 and 2, a multi-media flash distillation device based on multiple hot waste water utilizes simultaneously, it includes collection vapour main part 1 and a plurality of flash vessel 2, collection vapour main part 1 includes barrel 11 and sets up defroster 12 in barrel 11, defroster 12 level is laid at the middle part of barrel 11, and the top of a plurality of flash vessel 2 all communicates the setting with the bottom of barrel 11, and a plurality of media correspond carries out the flash distillation through a plurality of flash vessel 2, and the steam after the flash distillation upwards gets into in collection vapour main part 1.
The plurality of flash evaporators 2 may have the same or different structures as long as flash evaporation can be achieved. The medium (i.e. hot wastewater) entering each flash vessel 2 for flash treatment may be the same or different. Their temperature, pressure, composition, also including flow, may be the same, and may be different from each other; however, the steam generated by the plurality of flash evaporators 2 enters one steam collecting body 1 to carry out demisting and/or heat exchange processes, so that the temperature and the pressure of the steam generated by each flash evaporator 2 are the same, and the steam flow rate can be different.
Through setting up a collection vapour main part 1 of a plurality of flash vessel 2 simultaneous connections, flash evaporation when can realizing multiple hot waste water is compared with the mode that needs handle multiple hot waste water respectively through setting up a plurality of flash distillation plant among the prior art, effectively reduces heat recovery and utilizes's cost, has reduced flash distillation plant's area.
The steam collection body 1 further comprises a heat exchange tube 13 and a condensate tray 14 which are arranged in the barrel 11, wherein the heat exchange tube 13 is horizontally arranged at the upper part of the barrel 11, the condensate tray 14 is horizontally arranged between the heat exchange tube 13 and the demister 12, and a water inlet 13-1 and a water outlet 13-2 of the heat exchange tube 13 respectively penetrate through the barrel 11 to be communicated with external heat users. By the design, the heat exchange utilization of the steam can be realized while the flash steam is collected.
The steam collecting main body 1 and the flash evaporator 2 are both pressure vessels, the steam collecting main body 1 is preferably a horizontal steam collecting main body, and the flash evaporator 2 is preferably a vertical flash evaporator.
The steam collection body 1 is horizontally arranged. The heat supply circulating water flows in the pipe, and after being heated, the circulating water supplies heat to external heat users.
The steam outside the heat exchange pipe 13 is condensed and then drops on the condensed water tray 14, and is discharged through the condensed water outlet pipe 18.
The steam collecting main body 1 is also internally provided with a back washing device, the back washing device comprises a back washing water inlet pipe 20 and a plurality of spray heads which are arranged in a matrix manner along the horizontal direction, and the back washing water inlet pipe 20 is communicated with the spray heads through a pipe network.
Dirt on the plate-like demister 12 is washed away by powerful water jets, and backwash water is introduced through the backwash water inlet pipe 20. Several spray heads, arranged in a matrix, may cover all of the planar demisters 12. The back washing water inlet pipe 20 is provided with a first water inlet valve. The entry of backwash water is controlled by a first water inlet valve.
A number of spray heads are arranged between the condensate tray 14 and the demister 12.
The demister 12 is of a flat-plate-shaped structure and is located on the same horizontal plane with the axis of the cylinder 11, two sides of the demister 12 are fixedly connected with the inner wall of the cylinder 11, and the length of the demister 12 is the same as that of the cylinder 11.
The two ends of the cylinder 11 are both provided with end sockets 16, one of the end sockets 16 is communicated with a condensed water outlet pipe 18, and one end of the condensed water plate 14 close to the condensed water outlet pipe 18 extends into the end socket 16 and is provided with an opening. The condensed water falls into the space between the seal head 16 and the baffle 15 through the opening on the condensed water disk 14, and is finally discharged by the condensed water outlet pipe 18.
When the heat exchange tube is not arranged in the steam collection body 1, the other end enclosure 16 is communicated with a steam outlet tube 17, and the steam outlet tube 17 is provided with a steam valve. The discharge of flash steam in the steam collecting main body 1 is controlled by arranging a steam valve. If the pressure in the cylinder 11 is lower than the ambient atmospheric pressure, the steam outlet pipe 17 needs to be externally connected with a vacuum pump.
A guide plate 19 is connected to one end of the condensate tray 14 close to the condensate water outlet pipe 18, and the guide plate 19 is arranged vertically or obliquely downwards. By providing the deflector 19, the situation where some of the condensate falls into the demister 12 after the condensate has flowed down from the condensate tray 14 is avoided.
The condensed water tray 14 is arranged obliquely, and the low-level end of the condensed water tray is close to one side of the condensed water outlet pipe 18. Facilitating the outflow of the condensed water.
The flash evaporator 2 comprises a flash evaporator main body 21, a flash evaporation water inlet pipe 22 communicated with the upper part of the flash evaporator main body 21 and a flash evaporation water outlet pipe 23 communicated with the bottom of the flash evaporator main body 21, wherein a second water inlet valve is arranged on the flash evaporation water inlet pipe 22, and a drain valve is arranged on the flash evaporation water outlet pipe 23. The interior of the flash evaporator 2 is in a negative pressure environment, hot wastewater enters the flash evaporator 2 through the flash evaporation water inlet pipe 22 for flash evaporation, and residual hot wastewater after flash evaporation is discharged through the flash evaporation water outlet pipe 23. The second water inlet valve controls the inlet of the hot wastewater, and the drain valve controls the discharge of the residual non-flash hot wastewater.
The working principle is as follows:
the plurality of flash evaporators 2 are respectively a first flash evaporator to an Nth flash evaporator,
several kinds of hot waste water correspondingly enter the first to N flash evaporators through the flash inlet pipes 22 of the first to N flash evaporators. The pressure in the first to the Nth flash evaporator main bodies is determined by the pressure of the externally connected steam equipment, and the pressure is lower than the saturation pressure corresponding to the temperature of the hot wastewater entering from the flash evaporation water inlet pipes 22 of the first to the Nth flash evaporators, so that the hot wastewater is flashed immediately after entering the first to the Nth flash evaporators correspondingly, the generated flash evaporation steam flows upwards and enters the cylinder 11 of the steam collection main body 1, and the flash evaporation steam is conveyed to the steam equipment through the steam outlet pipe 17 or is subjected to heat exchange utilization through the heat exchange pipe 13 after being driven by pressure difference and carried liquid drops are removed by the demister 12. The hot waste water remaining from the flash evaporation is discharged through a drain of the flash evaporator 2.
The steam pressure in a plurality of flash evaporators 2 is the same, and the steam temperature generated by flash evaporation is the same.
After the flash steam enters the barrel 11, most of the large and small water drops carried in the steam collide and attach to the surface of the louver of the demister 12, flow downwards along the surface of the louver under the action of gravity, are accumulated at the bottom of the barrel 11 and then flow into each flash evaporator 2.
Since the flash process is a violent process that is instantaneously completed, impurities in the hot wastewater are easily carried by the vapor and the liquid droplets and remain on the louvers while flowing through the demister 12. Therefore, the demister 12 needs to be periodically back-flushed by a back-flushing device to remove the accumulation and blockage of impurities caused by steam demisting, and ensure the normal operation of the demister 12.
When heat exchange is performed through the heat exchange tube 13, heating circulating water enters the heat exchange tube 13 through the water inlet 13-1 of the heat exchange tube 13 to exchange heat with flash steam in the steam collection body 1, and the heat-exchanged heating circulating water flows out through the water outlet 13-2 of the heat exchange tube 13 to be supplied to a heat user. The flash steam obtained by flash evaporation through a plurality of flash evaporators 2 is subjected to heat exchange, so that the heat exchange efficiency is greatly improved.
Claims (10)
1. The utility model provides a multimedium flash distillation device based on multiple hot waste water utilizes simultaneously which characterized in that: it includes collection vapour main part (1) and a plurality of flash vessel (2), collection vapour main part (1) includes barrel (11) and defroster (12) of setting in barrel (11), defroster (12) level is laid in the middle part of barrel (11), and the top of a plurality of flash vessel (2) all communicates the setting with the bottom of barrel (11), and a plurality of kinds of medium correspond carries out the flash distillation through a plurality of flash vessel (2), and steam after the flash distillation upwards gets into in collection vapour main part (1).
2. The multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste waters according to claim 1, characterized in that: the steam collection main body (1) further comprises a heat exchange tube (13) and a condensed water disc (14) which are arranged in the barrel body (11), wherein the heat exchange tube (13) is horizontally arranged at the upper part of the barrel body (11), the condensed water disc (14) is horizontally arranged between the heat exchange tube (13) and the demister (12), and a water inlet (13-1) and a water outlet (13-2) of the heat exchange tube (13) respectively penetrate through the barrel body (11) to be communicated with an external heat user.
3. The multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste waters according to claim 2, characterized in that: the steam collection device is characterized in that a back washing device is further arranged in the steam collection main body (1), the back washing device comprises a back washing water inlet pipe (20) and a plurality of spray heads which are arranged in a matrix mode along the horizontal direction, and the back washing water inlet pipe (20) is communicated with the spray heads through a pipe network.
4. The multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste waters according to claim 3, characterized in that: a plurality of spray heads are disposed between the condensate tray (14) and the mist eliminator (12).
5. The multi-medium flash device based on simultaneous utilization of multiple hot waste waters according to claim 1, 2, 3 or 4, characterized in that: the demister (12) is of a flat-plate-shaped structure and is located on the same horizontal plane with the axis of the cylinder (11), the two sides of the demister (12) are fixedly connected with the inner wall of the cylinder (11), and the length of the demister (12) is the same as that of the cylinder (11).
6. The multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste waters according to claim 1, characterized in that: semicircular baffles (15) are vertically and fixedly arranged at the lower parts of the two ends of the barrel body (11) respectively, the plane ends of the baffles (15) are fixedly connected with the demister (12), and the cambered surface ends of the baffles (15) are fixedly connected with the inner wall of the lower part of the barrel body (11).
7. The multi-medium flash device based on simultaneous utilization of multiple hot waste waters according to claim 2, 3, 4 or 6, characterized in that: the two ends of the cylinder body (11) are respectively provided with an end socket (16), one end socket (16) is communicated with a condensed water outlet pipe (18), and one end of the condensed water plate (14) close to the condensed water outlet pipe (18) extends into the end socket (16) and is provided with an opening.
8. The multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste waters according to claim 7, characterized in that: a guide plate (19) is connected to one end, close to the condensed water outlet pipe (18), of the condensed water tray (14), and the guide plate (19) is arranged vertically or obliquely downwards.
9. The multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste waters according to claim 8, characterized in that: the condensed water tray (14) is obliquely arranged, and the low-level end of the condensed water tray is close to one side of the condensed water outlet pipe (18).
10. A multi-medium flash apparatus based on simultaneous utilization of multiple hot wastewaters according to claim 1, 2, 3, 4, 6, 8 or 9, characterized in that: the flash evaporator (2) comprises a flash evaporator main body (21), a flash evaporation water inlet pipe (22) communicated with the upper part of the flash evaporator main body (21) and a flash evaporation water outlet pipe (23) communicated with the bottom of the flash evaporator main body (21), a second water inlet valve is arranged on the flash evaporation water inlet pipe (22), and a drain valve is arranged on the flash evaporation water outlet pipe (23).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777662A (en) * | 2021-02-01 | 2021-05-11 | 哈尔滨工大金涛科技股份有限公司 | Multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112777662A (en) * | 2021-02-01 | 2021-05-11 | 哈尔滨工大金涛科技股份有限公司 | Multi-medium flash evaporation device based on simultaneous utilization of multiple hot waste water |
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