CN210505653U - Novel spraying system of low-temperature multi-effect seawater desalination device - Google Patents
Novel spraying system of low-temperature multi-effect seawater desalination device Download PDFInfo
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- CN210505653U CN210505653U CN201920811225.3U CN201920811225U CN210505653U CN 210505653 U CN210505653 U CN 210505653U CN 201920811225 U CN201920811225 U CN 201920811225U CN 210505653 U CN210505653 U CN 210505653U
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- 238000005507 spraying Methods 0.000 title claims abstract description 144
- 239000013535 sea water Substances 0.000 title claims abstract description 54
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000007921 spray Substances 0.000 claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims description 27
- 239000010865 sewage Substances 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000003491 array Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000011001 backwashing Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
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- 238000011403 purification operation Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model provides a novel sprinkler system of low temperature multiple effect sea water desalination device which characterized in that includes: the cross section of the evaporator is of a circular cavity structure, the top of the evaporator is connected with a water inlet pipe, and a cold source flows through the water inlet pipe; the bottom of the evaporator is provided with a seawater collecting pipe, and the side surface of the evaporator is also provided with a manhole; the filter device comprises a filter, a plurality of pipelines and valves, the pipelines and the valves are matched with the filter, pressure transmitters are arranged at the water inlet end and the water outlet end of the filter, pressure change can monitor the pressure difference between the two ends of the filter, and when the pressure difference is greater than a preset value, the filter device starts a self-cleaning function; a spraying device; the spraying device is arranged at the top in the evaporator and is connected with a water inlet pipe of the evaporator; the utility model provides a thereby heat exchange efficiency reduces to lead to making the problem that the water ratio reduces because the uneven heat source that causes of low temperature multiple-effect seawater desalination evaporimeter spray system nozzle water distribution.
Description
Technical Field
The utility model relates to a spraying system, concretely relates to novel spraying system of low temperature multiple-effect sea water desalination device.
Background
The low-temperature multi-effect seawater desalination is a desalination technology with the highest evaporation temperature of original seawater below 70 ℃, and is characterized in that a series of evaporators containing spray pipe bundles are connected in series, a certain amount of steam is input to the evaporators and is subjected to multiple evaporation and condensation, and the evaporation temperature of the latter effect is lower than that of the former effect, so that the process of desalinating water with the steam quantity multiple times is obtained. In the low-temperature multi-effect seawater desalination heat exchange process, the spraying system uniformly distributes the original seawater or the concentrated seawater on the outer surface of the heat exchange tube bundle of each evaporator through the nozzles to form a film, the raw seawater or the concentrated seawater flows from top to bottom, part of the seawater absorbs the latent heat of condensed steam in the heat exchange tubes to be vaporized, the rest concentrated seawater is pumped into the next effect group of the evaporator through the feeding pump, and the process is repeated to realize the production process of the desalinated water.
The number of the nozzles is large because of the small spatial size of the nozzles. When the original seawater or the concentrated seawater is mixed with particles, paint skin, rust slag and other impurity substances, the blockage of a nozzle in a spraying system is easily caused, the water distribution is uneven, the contact area of steam (a heat source) and water (a cold source) is reduced, and the water making ratio of the seawater desalination device is reduced due to the reduction of the heat exchange efficiency.
At present, only during the low-temperature multi-effect seawater desalination outage period, a water distribution test can be comprehensively carried out on a spraying system, and the positions and the number of blocked nozzles are marked. Because spray pipes and heat exchange pipes in the low-temperature multi-effect seawater desalination evaporator are densely arranged and have narrow space, personnel cannot enter the interior of the evaporator to independently disassemble and clean a single nozzle or a plurality of nozzles, and only can inspect and clean blocked nozzles one by one after dismantling the specific spray pipes of the specific evaporator in a manual mode. The implementation process is difficult, time-consuming, labor-consuming and labor-consuming, and has high construction safety risk and a plurality of uncontrollable factors, so the effect of the manual mechanical cleaning method is not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves is: the utility model discloses mainly solve because low temperature multiple-effect seawater desalination evaporimeter spray system nozzle water distribution inequality causes heat source, cold source area of contact to reduce, thereby heat exchange efficiency reduces and leads to making the problem that the water ratio reduces.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a novel sprinkler system of low temperature multiple effect sea water desalination device which characterized in that includes:
the evaporator is a place for exchanging heat between a cold source and a heat source, the cross section of the evaporator is of a circular cavity structure, the top of the evaporator is connected with a water inlet pipe, and the cold source flows through the water inlet pipe; the bottom of the evaporator is provided with a seawater collecting pipe for collecting concentrated seawater after heat exchange and evaporation of the cold source; a manhole is formed in the side face of the evaporator and used for observing the spraying state inside the evaporator and the scaling condition of the heat exchange tube;
the filtering device is arranged outside the evaporator, and the cold source enters the evaporator after being filtered by the filtering device; the filtering device can realize a filtering function and a self-cleaning function; the filtering device comprises a filter, a plurality of pipelines and valves which are matched with the filter, pressure transmitters are arranged at the water inlet end and the water outlet end of the filter, the pressure transmitter can monitor the pressure difference between the two ends of the filter, and when the pressure difference is greater than a preset value, the filtering device starts a self-cleaning function;
a spraying device; the spraying device is arranged at the top in the evaporator and is connected with a water inlet pipe of the evaporator; the evaporator water inlet pipe comprises a main pipe and a plurality of branch pipes, the spraying device comprises a plurality of spraying groups, and the branch pipes of the evaporator water inlet pipe are respectively connected with the plurality of spraying groups of the spraying device and downwards sprayed by the spraying groups.
Further, the spraying device comprises a first spraying group, a second spraying group, a third spraying group and a fourth spraying group, the first spraying group and the second spraying group are symmetrically arranged on two sides of the central line of the evaporator, and the third spraying group and the fourth spraying group are symmetrically arranged on two sides of the first spraying group and the second spraying group.
Furthermore, the spraying group is formed by connecting a plurality of spraying units, each spraying unit comprises a spraying pipe and nozzles arranged at the bottom of the spraying pipe, the nozzles are arranged in groups, each group comprises two nozzles, the nozzles are connected through a communicating pipe, and the bottom of each spraying pipe is provided with a plurality of nozzles connected through the communicating pipe; two ends of the spray pipe are of flange plate structures; the spraying units are connected into a spraying group through flange plates at two ends of the spraying pipe.
Furthermore, a plurality of heat exchange groups are arranged in the evaporator, and heat sources circulate in the heat exchange groups; the heat exchange group is an array formed by arranging single heat exchange tubes; the heat exchange set comprises: the first heat exchange group, the second heat exchange group, the third heat exchange group and the fourth heat exchange group are respectively arranged under the first spraying group, the second spraying group and the fourth spraying group; the bottom heat exchange tubes of the third heat exchange group and the fourth heat exchange group are arranged in an inclined manner; a supporting steel frame is arranged in the evaporator, the supporting steel frame is arranged between adjacent heat exchange groups, and heat exchange tube arrays in the heat exchange groups are installed on the supporting steel frame.
Furthermore, the filter comprises a first filter and a second filter, the water outlet ends of the first filter and the second filter are provided with a communicating pipe, and a communication electric door is arranged on the communicating pipe; the water inlet ends of the first filter and the second filter are connected with a water outlet pipe of a feed seawater pump, and the water outlet ends of the first filter and the second filter are connected with a water inlet pipe of an evaporator.
Furthermore, a first inlet electric door and a first inlet pressure transmitter are sequentially arranged at the water inlet end of the first filter; the water outlet end of the first filter is sequentially provided with a first outlet pressure transmitter and a first outlet electric door, and the bottom of the first filter is provided with a first sewage discharge pipe and a first sewage discharge electric door; the water inlet end of the second filter is sequentially provided with a second inlet electric door and a second inlet pressure transmitter; the water outlet end of the second filter is sequentially provided with a second outlet pressure transmitter and a second outlet electric door, and the bottom of the second filter is provided with a second sewage discharge pipe and a second sewage discharge electric door.
Furthermore, a filter cylinder, an aperture adjusting plate and a pneumatic shutoff valve are arranged in the filter; the aperture adjusting plate is sleeved outside the filter cylinder, and the aperture adjusting plate and the filter cylinder can slide slightly relative to each other; the pneumatic shutoff valve comprises a pneumatic actuating mechanism, a connecting shaft and a shutoff valve plate, the shutoff valve plate is arranged in the filter cylinder, and the shutoff valve plate is of a wafer structure; the shutoff valve plate is arranged on the connecting shaft, and the connecting shaft is controlled by the pneumatic actuating mechanism.
Further, the filter cylinder comprises a side wall and a bottom surface, the side wall and the bottom surface form a cavity structure of the filter cylinder, the bottom surface of the filter cylinder is of a conical structure, and the lowest part of the bottom surface is connected with a sewage discharge pipe; the filter cartridge is provided with a plurality of holes which are regularly arranged; the aperture adjusting plate is of a cylindrical structure, and holes are formed in the aperture adjusting plate, wherein the diameters and the arrangement mode of the holes are the same as those of the filter cylinder.
Further, a sacrificial anode is arranged on the inner wall of the filter cylinder.
Furthermore, the water inlet end and the water outlet end of the filtering device are respectively provided with an expansion joint.
The utility model has the advantages that:
1. the utility model discloses a spraying device is provided, the spraying device comprises a first spraying group, a second spraying group, a third spraying group and a fourth spraying group, the first spraying group and the second spraying group are symmetrically arranged at two sides of the central line of the evaporator, the third spraying group and the fourth spraying group are symmetrically arranged at two sides of the first spraying group and the second spraying group; the utility model discloses a spray the inside circular cavity structure of group's mode of arranging make full use of evaporimeter, spray first group and second and spray the group and set up in the inside highest point of evaporimeter, also set up the third in the inside high lower both sides of evaporimeter simultaneously and spray group and fourth and spray the group, this kind of mode of arranging that sprays the group is different from the traditional mode of arranging that only sprays the group at the evaporimeter highest point installation, furthest's shape that has utilized the evaporimeter, the multiunit has been increased and has been sprayed the group, the lifting means utilization ratio, increase production efficiency.
2. The utility model is provided with a plurality of heat exchange groups in the evaporator aiming at the heat exchange groups which are made by the spraying device and are matched with the spraying device, and heat sources flow in the heat exchange groups; the heat exchange group is an array formed by arranging single heat exchange tubes; the heat exchange set includes: the first heat exchange group, the second heat exchange group, the third heat exchange group and the fourth heat exchange group are respectively arranged under the first spraying group, the second spraying group and the fourth spraying group; a supporting steel frame is arranged in the evaporator, the supporting steel frame is arranged between adjacent heat exchange groups, and heat exchange tube arrays in the heat exchange groups are arranged on the supporting steel frame. Set up heat transfer device under spray set, at the in-process of spray set spraying cold source downwards, the cold source falls downwards under self action of gravity again, falls into the heat transfer group under, and the heat transfer is organized the interior circulation heat source, carries out abundant heat transfer with top-down cold source, promotes the evaporation rate. In addition, the heat exchange tubes at the bottoms of the third heat exchange group and the fourth heat exchange group are arranged in an inclined manner, so that the space in the evaporator is occupied to the greatest extent, and the utilization rate of the evaporator is improved.
3. The utility model discloses strain a section of thick bamboo outside and set up sacrificial anode for the protection band contains whole section of straining a section of thick bamboo and attached metal material accessory, and it is lively to choose for use sacrificial material to obviously more protect metal material, thereby realizes delaying filter screen and attached metal material accessory corrosion rate's effect.
4. The utility model arranges the pressure transmitter at the two ends of the filter, when the pressure transmitter monitors the pressure difference between the inlet and outlet sides of the filter device to exceed the set value, the pressure transmitter immediately sends an alarm instruction to the control system to prompt the adjustment of the operation mode and start the back washing process; in the backwashing process, at least one filter is ensured to be normally used, so that the stable and excessive adjustment of the flow of the spraying device is ensured, and the accident that the two filters in the filtering device simultaneously carry out backwashing purification operation to cause the cutoff of the spraying device is avoided.
5. In the utility model, the outside of the filter cylinder is provided with the aperture adjusting plate, and the filter cylinder is provided with a plurality of holes which are regularly arranged; the aperture adjusting plate is of a cylindrical structure, and is provided with holes, wherein the diameters and the arrangement mode of the holes are the same as those of the filter cartridge. When the eyelet of the filter cylinder is overlapped with the eyelet of the aperture adjusting plate, the circulation rate of the cold source in the filter cylinder is fastest, when the filter cylinder is adjusted by the aperture adjusting plate in a dislocation way, the outlet of the cold source is the overlapped part of the eyelet of the filter cylinder and the eyelet of the aperture adjusting plate, and the circulation rate of the cold source is reduced. The adjusting mode can play a role in adjusting the filter holes, so that the filtering requirements of various cold sources are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a connection diagram of the filtering unit groups of the novel low-temperature multi-effect seawater desalination spraying system.
Fig. 2 is a schematic structural diagram of the novel low-temperature multi-effect seawater desalination spraying system filtering device of the utility model.
Fig. 3 is a partial enlarged view of the novel low-temperature multi-effect seawater desalination spraying system filter screen of the utility model.
FIG. 4 is a cross-sectional space layout diagram of the novel low-temperature multi-effect seawater desalination spraying system evaporator
Fig. 5 is a partial enlarged view of the spray pipe and the spray nozzle of the novel low-temperature multi-effect seawater desalination spray system.
Fig. 6 is a schematic diagram of the novel low-temperature multi-effect seawater desalination spraying system of the present invention during operation.
Fig. 7 is a schematic diagram of the first embodiment of the novel low-temperature multi-effect seawater desalination spraying system filtering device of the present invention during cleaning.
FIG. 8 is a schematic view of the second embodiment of the novel low-temperature multi-effect seawater desalination spraying system of the present invention during cleaning
Wherein:
1. a first inlet electrically operated gate; 2. a first inlet pressure transmitter; 3. a first outlet pressure transmitter;
4. a first outlet electrically operated door; 5. an automatic exhaust valve; 6. a pneumatic shut-off valve; 7. a filter cartridge;
8. an aperture adjustment plate; 9. a sacrificial anode; 10. a first waste discharge electrically operated door; 11. a communication power door;
12. a first drain pipe; 13. closing the valve plate; 14. a first filter; 15. a second filter;
16. a second inlet electrically operated gate; 17. a second outlet electrically operated gate; 18. a second blowdown electrically operated door; 19. feeding a seawater pump;
20. a first spray group; 21. a second spraying group; 22. a third spraying group; 23. a fourth spraying group;
24. a third heat exchange group; 25. a first heat exchange set; 26. a second heat exchange group; 27. a fourth heat exchange group;
28. supporting the steel frame; 29. a heat exchange pipe; 30. an evaporator housing; 31. a seawater collecting pipe; 32. a connecting flange;
33. a nozzle;
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-8, a novel spraying system of a low-temperature multi-effect seawater desalination device is characterized by comprising:
the evaporator is a place for exchanging heat between a cold source and a heat source, the cross section of the evaporator is of a circular cavity structure, the top of the evaporator is connected with a water inlet pipe, and the cold source flows through the water inlet pipe; the bottom of the evaporator is provided with a seawater collecting pipe for collecting concentrated seawater after heat exchange and evaporation of the cold source; a manhole is formed in the side face of the evaporator and used for observing the spraying state inside the evaporator and the scaling condition of the heat exchange tube;
the filtering device is arranged outside the evaporator, and the cold source enters the evaporator after being filtered by the filtering device; the filtering device can realize a filtering function and a self-cleaning function; the filtering device comprises a filter, a plurality of pipelines and valves which are matched with the filter, pressure transmitters are arranged at the water inlet end and the water outlet end of the filter, the pressure transmitter can monitor the pressure difference between the two ends of the filter, and when the pressure difference is greater than a preset value, the filtering device starts a self-cleaning function;
a spraying device; the spraying device is arranged at the top in the evaporator and is connected with a water inlet pipe of the evaporator; the evaporator water inlet pipe comprises a main pipe and a plurality of branch pipes, the spraying device comprises a plurality of spraying groups, and the branch pipes of the evaporator water inlet pipe are respectively connected with the plurality of spraying groups of the spraying device and downwards sprayed by the spraying groups.
The spraying device comprises a first spraying group, a second spraying group, a third spraying group and a fourth spraying group, wherein the first spraying group and the second spraying group are symmetrically arranged on two sides of the central line of the evaporator, and the third spraying group and the fourth spraying group are symmetrically arranged on two sides of the first spraying group and the second spraying group.
As shown in fig. 5, the spraying group is formed by connecting a plurality of spraying units, each spraying unit comprises a spraying pipe and nozzles arranged at the bottom of the spraying pipe, wherein the nozzles are arranged in groups, each group comprises two nozzles, the nozzles are connected through a communicating pipe, and the bottom of the spraying pipe is provided with a plurality of nozzles connected through the communicating pipe; two ends of the spray pipe are of flange plate structures; the spraying units are connected into a spraying group through flange plates at two ends of the spraying pipe.
As shown in fig. 4, a plurality of heat exchange sets are arranged in the evaporator, and heat sources circulate in the heat exchange sets; the heat exchange group is an array formed by arranging single heat exchange tubes; the heat exchange set comprises: the first heat exchange group, the second heat exchange group, the third heat exchange group and the fourth heat exchange group are respectively arranged under the first spraying group, the second spraying group and the fourth spraying group; the bottom heat exchange tubes of the third heat exchange group and the fourth heat exchange group are arranged in an inclined manner; a supporting steel frame is arranged in the evaporator, the supporting steel frame is arranged between adjacent heat exchange groups, and heat exchange tube arrays in the heat exchange groups are installed on the supporting steel frame.
As shown in fig. 2, the filter includes a first filter and a second filter, the water outlet ends of the first filter and the second filter are provided with a communicating pipe, and the communicating pipe is provided with a communicating electric door; the water inlet ends of the first filter and the second filter are connected with a water outlet pipe of a feed seawater pump, and the water outlet ends of the first filter and the second filter are connected with a water inlet pipe of an evaporator.
The water inlet end of the first filter is sequentially provided with a first inlet electric door and a first inlet pressure transmitter; the water outlet end of the first filter is sequentially provided with a first outlet pressure transmitter and a first outlet electric door, and the bottom of the first filter is provided with a first sewage discharge pipe and a first sewage discharge electric door; the second filter has the same structure as the first filter. The water inlet end of the second filter is sequentially provided with a second inlet electric door and a second inlet pressure transmitter; the water outlet end of the second filter is sequentially provided with a second outlet pressure transmitter and a second outlet electric door, and the bottom of the second filter is provided with a second sewage discharge pipe and a second sewage discharge electric door.
As shown in fig. 3, a filter cartridge, an aperture adjusting plate and a pneumatic shutoff valve are arranged in the filter; the aperture adjusting plate is sleeved outside the filter cylinder, and the aperture adjusting plate and the filter cylinder can slide slightly relative to each other; the pneumatic shutoff valve comprises a pneumatic actuating mechanism, a connecting shaft and a shutoff valve plate, the shutoff valve plate is arranged in the filter cylinder, and the shutoff valve plate is of a wafer structure; the shutoff valve plate is arranged on the connecting shaft, and the connecting shaft is controlled by the pneumatic actuating mechanism.
The valve plate of the shutoff valve is arranged at the position which is deviated from the upper side in the filter cylinder, when the valve plate of the shutoff valve is inclined, the shutoff valve is in an open state, and at the moment, cold sources can enter the bottom of the filter cylinder through the shutoff valve; when the valve plate of the shutoff valve is horizontally placed, the shutoff valve is in a closed state, and at the moment, the cold source cannot enter the bottom of the filter cylinder through the shutoff valve and only can flow out through the side wall of the upper side of the filter cylinder.
The filter cartridge comprises a side wall and a bottom surface, wherein the side wall and the bottom surface form a cavity structure of the filter cartridge, the bottom surface of the filter cartridge is of a conical structure, and the lowest part of the bottom surface is connected with a sewage discharge pipe; the filter cartridge is provided with a plurality of holes which are regularly arranged; the aperture adjusting plate is of a cylindrical structure, and holes are formed in the aperture adjusting plate, wherein the diameters and the arrangement mode of the holes are the same as those of the filter cylinder. And a sacrificial anode is arranged on the outer wall of the filter cylinder. The water inlet end and the water outlet end of the filtering device are respectively provided with an expansion joint. Effectively slow down pipeline vibration and the heavy stress damage to pipeline production of ground. The top of the filter is also provided with an exhaust valve.
The working mode is as follows:
the utility model arranges the pressure transmitter at the two ends of the filter, when the pressure transmitter monitors the pressure difference between the inlet and outlet sides of the filter device to exceed the set value, the pressure transmitter immediately sends an alarm instruction to the control system to prompt the adjustment of the operation mode and start the back washing process; in the backwashing process, at least one filter is ensured to be normally used, so that the stable and excessive adjustment of the flow of the spraying device is ensured, and the accident that the two filters in the filtering device simultaneously carry out backwashing purification operation to cause the cutoff of the spraying device is avoided.
The operation mode of the filter comprises the following three modes:
the first embodiment is as follows:
as shown in fig. 6, the communication power door between the first filter and the second filter is closed, and the first filter and the second filter are simultaneously operated. The cold source enters the inlets of the first filter and the second filter respectively and flows out of the outlets of the first filter and the second filter. In this way the first filter and the second filter operate simultaneously.
Example two:
as shown in fig. 7, the communication electric door between the first filter and the second filter is opened, the second inlet electric door and the second outlet electric door of the second filter are closed, and the second sewage electric door is opened. The first filter now functions normally while the first filter provides a clean water source for the second filter for cleaning. The cleaning water source enters from the water outlet end of the second filter through the communication electric door, enters the inner side of the filter cylinder from the outer side of the filter cylinder for backwashing, so that impurities deposited on the inner side of the filter cylinder are washed away, and backwashing sewage is discharged from the second sewage discharge pipe at the bottom of the filter cylinder. The mode is used for the condition that the load of the seawater desalination equipment is low, at the moment, the first filter is in a working state, and the second filter is in a cleaning state.
Example three:
if the load of the seawater desalination equipment is high, but the filter needs to be cleaned at the same time, the cleaning mode is adopted: as shown in fig. 8, at this time, the first filter is in the working state, the second filter is in the internal cleaning state, and the communication electric door between the first filter and the second filter is closed; closing the pneumatic shutoff valve of the second filter to enable the valve plate of the shutoff valve to be in a closed state; opening a second pollution discharge electric door; at the moment, in the second filter, the cold source flows out from the side wall on the upper side of the filter cylinder, enters a gap between the outside of the filter cylinder and the shell of the filter, then flows in from the outer side of the filter cylinder, backwashing is carried out on the filter cylinder on the lower part of the second pneumatic shutoff valve, backwashing sewage is discharged from a second sewage discharge pipe at the bottom of the filter cylinder, and filtered water enters the evaporator from a water outlet end.
It should be noted that, above-mentioned embodiment has adopted two filters to explain as an example the utility model discloses a technological effect if adopt many filters, then guarantee at least that a filter is in operating condition to guarantee that spray set flow steadily adjusts excessively, avoid appearing two filters among the filter equipment and carry out back flush purification operation simultaneously, and cause the accident of spray set cutout.
The above three sets of embodiments may be used alone or in combination.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a novel sprinkler system of low temperature multiple effect sea water desalination device which characterized in that includes:
the evaporator is a place for exchanging heat between a cold source and a heat source, the cross section of the evaporator is of a circular cavity structure, the top of the evaporator is connected with a water inlet pipe, and the cold source flows through the water inlet pipe; the bottom of the evaporator is provided with a seawater collecting pipe for collecting concentrated seawater after heat exchange and evaporation of the cold source; a manhole is formed in the side face of the evaporator and used for observing the spraying state inside the evaporator and the scaling condition of the heat exchange tube;
the filtering device is arranged outside the evaporator, and the cold source enters the evaporator after being filtered by the filtering device; the filtering device can realize a filtering function and a self-cleaning function; the filtering device comprises a filter, a plurality of pipelines and valves which are matched with the filter, pressure transmitters are arranged at the water inlet end and the water outlet end of the filter, the pressure transmitter can monitor the pressure difference between the two ends of the filter, and when the pressure difference is greater than a preset value, the filtering device starts a self-cleaning function;
a spraying device; the spraying device is arranged at the top in the evaporator and is connected with a water inlet pipe of the evaporator; the evaporator water inlet pipe comprises a main pipe and a plurality of branch pipes, the spraying device comprises a plurality of spraying groups, and the branch pipes of the evaporator water inlet pipe are respectively connected with the plurality of spraying groups of the spraying device and downwards sprayed by the spraying groups.
2. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 1, characterized in that: the spraying device comprises a first spraying group, a second spraying group, a third spraying group and a fourth spraying group, wherein the first spraying group and the second spraying group are symmetrically arranged on two sides of the central line of the evaporator, and the third spraying group and the fourth spraying group are symmetrically arranged on two sides of the first spraying group and the second spraying group.
3. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 1, characterized in that: the spraying group is formed by connecting a plurality of spraying units, each spraying unit comprises a spraying pipe and nozzles arranged at the bottom of the spraying pipe, the nozzles are arranged in groups, two nozzles are arranged in each group, the nozzles are connected through communicating pipes, and a plurality of nozzles connected through the communicating pipes are arranged at the bottom of each spraying pipe; two ends of the spray pipe are of flange plate structures; the spraying units are connected into a spraying group through flange plates at two ends of the spraying pipe.
4. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 1, characterized in that: a plurality of heat exchange groups are arranged in the evaporator, and heat sources circulate in the heat exchange groups; the heat exchange group is an array formed by arranging single heat exchange tubes; the heat exchange set comprises: the first heat exchange group, the second heat exchange group, the third heat exchange group and the fourth heat exchange group are respectively arranged under the first spraying group, the second spraying group and the fourth spraying group; the bottom heat exchange tubes of the third heat exchange group and the fourth heat exchange group are arranged in an inclined manner; a supporting steel frame is arranged in the evaporator, the supporting steel frame is arranged between adjacent heat exchange groups, and heat exchange tube arrays in the heat exchange groups are installed on the supporting steel frame.
5. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 1, characterized in that: the filter comprises a first filter and a second filter, the water outlet ends of the first filter and the second filter are provided with a communicating pipe, and a communication electric door is arranged on the communicating pipe; the water inlet ends of the first filter and the second filter are connected with a water outlet pipe of a feed seawater pump, and the water outlet ends of the first filter and the second filter are connected with a water inlet pipe of an evaporator.
6. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 1, characterized in that: the water inlet end of the first filter is sequentially provided with a first inlet electric door and a first inlet pressure transmitter; the water outlet end of the first filter is sequentially provided with a first outlet pressure transmitter and a first outlet electric door, and the bottom of the first filter is provided with a first sewage discharge pipe and a first sewage discharge electric door; the water inlet end of the second filter is sequentially provided with a second inlet electric door and a second inlet pressure transmitter; the water outlet end of the second filter is sequentially provided with a second outlet pressure transmitter and a second outlet electric door, and the bottom of the second filter is provided with a second sewage discharge pipe and a second sewage discharge electric door.
7. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 5, characterized in that: a filter cylinder, an aperture adjusting plate and a pneumatic shutoff valve are arranged in the filter; the aperture adjusting plate is sleeved outside the filter cylinder, and the aperture adjusting plate and the filter cylinder can slide slightly relative to each other; the pneumatic shutoff valve comprises a pneumatic actuating mechanism, a connecting shaft and a shutoff valve plate, the shutoff valve plate is arranged in the filter cylinder, and the shutoff valve plate is of a wafer structure; the shutoff valve plate is arranged on the connecting shaft, and the connecting shaft is controlled by the pneumatic actuating mechanism.
8. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 7, characterized in that: the filter cartridge comprises a side wall and a bottom surface, the side wall and the bottom surface form a cavity structure of the filter cartridge, the bottom surface of the filter cartridge is of a conical structure, and the lowest part of the bottom surface is connected with a sewage discharge pipe; the filter cartridge is provided with a plurality of holes which are regularly arranged; the aperture adjusting plate is of a cylindrical structure, and holes are formed in the aperture adjusting plate, wherein the diameters and the arrangement mode of the holes are the same as those of the filter cylinder.
9. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 8, characterized in that: and a sacrificial anode is arranged on the outer wall of the filter cylinder.
10. The novel spraying system of the low-temperature multi-effect seawater desalination device as claimed in claim 1, characterized in that: and the water inlet end and the water outlet end of the filtering device are respectively provided with an expansion joint.
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CN110182876A (en) * | 2019-05-31 | 2019-08-30 | 天津国投津能发电有限公司 | A kind of novel spray system of low-temperature multi-effect seawater desalination device |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110182876A (en) * | 2019-05-31 | 2019-08-30 | 天津国投津能发电有限公司 | A kind of novel spray system of low-temperature multi-effect seawater desalination device |
CN110182876B (en) * | 2019-05-31 | 2024-06-11 | 天津国投津能发电有限公司 | Operation method of spraying system of low-temperature multi-effect seawater desalination device |
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