CN117003319B - High-salt organic wastewater continuous treatment evaporation tower - Google Patents
High-salt organic wastewater continuous treatment evaporation tower Download PDFInfo
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- CN117003319B CN117003319B CN202310968449.6A CN202310968449A CN117003319B CN 117003319 B CN117003319 B CN 117003319B CN 202310968449 A CN202310968449 A CN 202310968449A CN 117003319 B CN117003319 B CN 117003319B
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- 238000001704 evaporation Methods 0.000 title claims abstract description 237
- 230000008020 evaporation Effects 0.000 title claims abstract description 189
- 239000002351 wastewater Substances 0.000 title claims abstract description 63
- 238000004140 cleaning Methods 0.000 claims abstract description 64
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 239000006260 foam Substances 0.000 claims description 54
- 238000005507 spraying Methods 0.000 claims description 38
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 abstract description 19
- 238000013461 design Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000005406 washing Methods 0.000 abstract description 11
- 238000004065 wastewater treatment Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 14
- 238000009434 installation Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 241001640558 Cotoneaster horizontalis Species 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a high-salt organic wastewater continuous treatment evaporation tower, wherein a tower body is provided with a plurality of evaporation chambers which are arranged side by side, each evaporation chamber comprises a downstream evaporation zone, a countercurrent evaporation zone and a bottom air guide zone, and the bottom of each air guide zone is provided with a liquid outlet; each concurrent evaporation zone is provided with a first spray header and a first evaporation pipe, and each countercurrent evaporation zone is internally provided with a second spray header and a second evaporation pipe. According to the high-salt organic wastewater continuous treatment evaporation tower with the optimal design, the evaporation coil is cleaned on line, the evaporation coil is not required to be stopped during cleaning, and the waste water is utilized for cleaning, so that no additional cleaning waste water is generated, the continuous treatment of the waste water by the evaporation tower is realized, the effective operation time of the system is greatly prolonged, and the waste water treatment capacity of the system is improved; through setting up downstream evaporation zone and countercurrent evaporation zone to the evaporation chamber, can improve heat transfer efficiency, and can furthest utilize the wind channel space, reduced evaporation chamber cleaning water volume as far as possible, reduce the long period of washing early stage retaining.
Description
Technical Field
The invention relates to the technical field of high-salt organic wastewater treatment, in particular to a high-salt organic wastewater continuous treatment evaporation tower.
Background
The high-salt organic wastewater evaporation concentration system is applied to the industrial high-salt wastewater evaporation concentration treatment process, can perform surface evaporation (non-boiling) under the conditions of normal pressure, medium and low temperature (not more than 55 ℃), and has the characteristics of energy conservation, high concentration ratio, excellent effluent quality, easy maintenance and the like.
However, the existing organic wastewater evaporation and concentration system also has certain defects. When high-salt wastewater containing complex high-molecular organic matters needs to be treated, crystals with a certain thickness adhere to the surface of an evaporation coil in an evaporation tower after a certain period of operation, so that the evaporation efficiency is obviously reduced, and the heat balance of the system cannot be maintained. The crystallization level is non-hardened and soluble, is mainly concentrated in the middle lower layer of the evaporating coil, and the spray water scouring strength of the conventional top spray can only meet the requirement of having a better self-cleaning effect on the upper layer of the coil. Therefore, in order to thoroughly clean the crystals on the underlying coil, it is necessary to shut down the evaporator coil to clean it. During cleaning, condensate water generated by the system is pumped into the spray pipeline above the coil pipe to wash and dissolve crystals attached to the surface of the coil pipe, so that the effect of cleaning the coil pipe is achieved. The cleaning process needs to be stopped and consumes a certain time, and meanwhile, the generated cleaning wastewater also needs to be returned to the system for treatment, so that the actual treatment capacity of the system is greatly affected.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a high-salt organic wastewater continuous treatment evaporation tower.
The invention provides a high-salt organic wastewater continuous treatment evaporation tower, which comprises the following components: the device comprises a tower body, a foam catcher, an evaporation tube group, a wastewater spraying mechanism, a plurality of first ultrasonic wave generating devices and a plurality of second ultrasonic wave generating devices;
An air inlet cavity, an air guide cavity and an air outlet cavity are arranged in the tower body, the air inlet cavity and the air outlet cavity are arranged side by side, the bottoms of the air inlet cavity and the air outlet cavity are communicated through the air guide cavity, an air inlet is formed in the top of the air inlet cavity, and an air outlet is formed in the top of the air outlet cavity;
The tower body is internally provided with a plurality of partition boards which are arranged side by side, the partition boards extend into the air outlet cavity from the air inlet cavity through the air guide cavity along the air inlet direction, a plurality of concurrent evaporation areas which are arranged side by side are formed in the air inlet cavity, a plurality of air guide areas which are arranged side by side are formed in the air guide cavity, and a plurality of countercurrent evaporation areas which are arranged side by side are formed in the air outlet cavity; each concurrent evaporation zone is respectively communicated with one air guide zone and one countercurrent evaporation zone in sequence to form an evaporation chamber, the bottom of each air guide zone is provided with a liquid outlet, and the liquid outlet is provided with a liquid outlet valve;
The waste water spraying mechanism comprises a plurality of first spraying heads and a plurality of second spraying heads, each first spraying head and each first evaporation pipe are positioned in one concurrent evaporation zone, the first spraying heads are positioned above the first evaporation pipes, each second spraying head and each second evaporation pipe are positioned in one countercurrent evaporation zone, and the second spraying heads are positioned above the second evaporation pipes;
Each first ultrasonic wave generating device is used for carrying out ultrasonic wave cleaning on a first evaporation tube in each concurrent evaporation zone, and each second ultrasonic wave generating device is used for carrying out ultrasonic wave cleaning on a second evaporation tube in one countercurrent evaporation zone;
the foam catcher is positioned in the air outlet cavity and above the countercurrent evaporation area.
Preferably, the baffle includes air inlet portion, liquid separation portion and the air-out portion that connects gradually, air inlet portion is located the air inlet intracavity, liquid separation portion is located the wind-guiding intracavity, the air-out portion is located the air-out intracavity, air inlet portion with the height of air-out portion is unequal.
Preferably, the height of the air inlet part is greater than the height of the air outlet part.
Preferably, the air deflector is arranged on the liquid separation part, and the air deflector is provided with an arc-shaped structure extending from the concurrent evaporation area to the countercurrent evaporation area.
Preferably, the first evaporating pipe comprises a plurality of first coil pipe parts which are communicated in sequence and are arranged in parallel along the air inlet direction;
and/or the second evaporating pipe comprises a plurality of second coil pipe parts which are communicated in sequence and are arranged in parallel along the air inlet direction.
Preferably, the first ultrasonic wave generating device comprises a first ultrasonic wave generator and a first ultrasonic vibration rod connected with the first ultrasonic wave generator, and the first ultrasonic vibration rod extends along a direction perpendicular to the coil pipe part;
and/or the second ultrasonic wave generating device comprises a second ultrasonic wave generator and a second ultrasonic vibration rod connected with the second ultrasonic wave generator, and the second ultrasonic vibration rod extends along the direction perpendicular to the coil pipe part.
Preferably, the first ultrasonic vibration bar is located below the first evaporation tube, and the second ultrasonic vibration bar is located below the second evaporation tube. Preferably, under the cleaning working condition of the evaporating pipes, a drain valve at the bottom of the evaporating chamber is closed, and when the liquid level in the evaporating chamber submerges the first evaporating pipe, the second evaporating pipe and the corresponding ultrasonic generators, the ultrasonic generators are started; after the cleaning is finished, a liquid discharge valve at the bottom of the evaporation chamber is opened to discharge liquid; repeating the steps, starting the cleaning of the evaporating pipes of the next evaporating chamber until the cleaning of all the evaporating chambers is completed.
Preferably, each liquid outlet is provided with a pressure sensor, and the ultrasonic generator is started according to the detection result of the pressure sensor.
According to the high-salt organic wastewater continuous treatment evaporation tower, a tower body is provided with a plurality of evaporation chambers which are arranged side by side, each evaporation chamber comprises a forward flow evaporation zone, a reverse flow evaporation zone and a bottom air guide zone, and a liquid outlet is arranged at the bottom of each air guide zone; each concurrent evaporation zone is provided with a first spray header and a first evaporation pipe, and each countercurrent evaporation zone is internally provided with a second spray header and a second evaporation pipe. According to the high-salt organic wastewater continuous treatment evaporation tower with the optimal design, the evaporation coil is cleaned on line, the evaporation coil is not required to be stopped during cleaning, and the waste water is utilized for cleaning, so that no additional cleaning waste water is generated, the continuous treatment of the waste water by the evaporation tower is realized, the effective operation time of the system is greatly prolonged, and the waste water treatment capacity of the system is improved; through setting up downstream evaporation zone and countercurrent evaporation zone to the evaporation chamber, can improve heat transfer efficiency, and can furthest utilize the wind channel space, reduced evaporation chamber cleaning water volume as far as possible, reduce the long period of washing early stage retaining.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a high-salt organic wastewater continuous treatment evaporation tower according to the present invention.
Fig. 2 is a schematic diagram showing the internal structure of an embodiment of a high-salt organic wastewater continuous treatment evaporation tower according to the present invention.
Fig. 3 is a schematic internal perspective view of an embodiment of a continuous high-salt organic wastewater treatment evaporation tower according to the present invention.
Fig. 4 is a schematic structural diagram of a foam trap in an embodiment of a continuous high-salt organic wastewater treatment evaporation tower according to the present invention.
Fig. 5 is a schematic diagram of a partial structure of a foam breaker and a tower body in an embodiment of a high-salt organic wastewater continuous treatment evaporation tower according to the present invention.
Detailed Description
Fig. 1 to 5 show, fig. 1 is a schematic structural view of an embodiment of a high-salt organic wastewater continuous treatment evaporation tower according to the present invention, fig. 2 is a schematic internal structural view of an embodiment of a high-salt organic wastewater continuous treatment evaporation tower according to the present invention, fig. 3 is a schematic internal perspective structural view of an embodiment of a high-salt organic wastewater continuous treatment evaporation tower according to the present invention, fig. 4 is a schematic structural view of a foam catcher in an embodiment of a high-salt organic wastewater continuous treatment evaporation tower according to the present invention, and fig. 5 is a schematic partial structural view of a foam catcher and a tower body installation in an embodiment of a high-salt organic wastewater continuous treatment evaporation tower according to the present invention.
Referring to fig. 1 to 3, the high-salt organic wastewater continuous treatment evaporation tower provided by the present invention comprises: the device comprises a tower body 1, a foam catcher 4, an evaporation tube group and a waste water spraying mechanism;
an air inlet cavity, an air guide cavity and an air outlet cavity are arranged in the tower body 1, the air inlet cavity and the air outlet cavity are arranged side by side, the bottoms of the air inlet cavity and the air outlet cavity are communicated through the air guide cavity, an air inlet is formed in the top of the air inlet cavity, and an air outlet is formed in the top of the air outlet cavity;
The tower body 1 is internally provided with a plurality of partition boards which are arranged side by side, the partition boards extend into the air outlet cavity from the air inlet cavity through the air guide cavity along the air inlet direction, a plurality of concurrent evaporation areas which are arranged side by side are formed in the air inlet cavity, a plurality of air guide areas which are arranged side by side are formed in the air guide cavity, and a plurality of countercurrent evaporation areas which are arranged side by side are formed in the air outlet cavity; each concurrent evaporation zone is respectively communicated with one air guide zone and one countercurrent evaporation zone in sequence to form an evaporation chamber, the bottom of each air guide zone is provided with a liquid outlet, and the liquid outlet is provided with a liquid outlet valve;
The waste water spraying mechanism comprises a plurality of first spraying heads 51 and a plurality of second spraying heads 52, each first spraying head and each first evaporation pipe 31 are positioned in one concurrent evaporation zone, the first spraying heads 51 are positioned above the first evaporation pipes 31, each second spraying head and each second evaporation pipe 32 are positioned in one countercurrent evaporation zone, and the second spraying heads 52 are positioned above the second evaporation pipes 32;
each first ultrasonic wave generating device is used for carrying out ultrasonic wave cleaning on a first evaporation tube in a concurrent evaporation zone, and each second ultrasonic wave generating device is used for carrying out ultrasonic wave cleaning on a second evaporation tube in a countercurrent evaporation zone;
The foam catcher 4 is positioned in the air outlet cavity and above the countercurrent evaporation zone.
The high-salt organic wastewater continuous treatment evaporation tower of the embodiment is under the normal operation condition:
Firstly, dry air at 40-50 ℃ under normal pressure is introduced into an air inlet of an evaporation tower, waste water with certain pressure is introduced through a waste water spraying mechanism and sprayed onto all evaporation tray groups through a spray header, high-temperature and high-pressure gaseous refrigerant is introduced into the evaporation tray groups, heat exchange is carried out between the evaporation tray groups and the waste water, the waste water is converted into saturated steam, the saturated steam is sequentially carried out of the evaporation tower along with the air through an air inlet cavity, an air guide cavity and an air outlet cavity, the gaseous refrigerant is converted into high-temperature and high-pressure liquid refrigerant, the high-temperature and high-pressure liquid refrigerant flows back from the evaporation tray groups, and the concentrated waste water is discharged through a liquid outlet at the bottom of the evaporation tower.
Through the baffle design, divide into a plurality of independent work's evaporation passageway with the evaporation tower interior, every evaporation passageway is including downstream evaporation zone, wind-guiding district and the countercurrent evaporation zone of intercommunication in proper order. As evaporation proceeds, crystals adhering to the surface of the evaporation tube accumulate, and evaporation efficiency gradually decreases. In actual design, whether the evaporating tube group reaches the cleaning critical point can be judged through the high-low pressure value of the compressor in the system, the change condition of the condensate water flow rate and the like.
In actual operation, an on-line cleaning mode without stopping is adopted, namely, a refrigerant pipeline of an evaporation pipeline, an air path of a tower body and a liquid discharge waterway in the cleaning period are kept in an operating state. The total heat exchange area of the pre-designed evaporation tube group is left with a certain margin, and the evaporation tube of one evaporation chamber can normally operate without participating in evaporation, so that the heat balance of the system can not be damaged. Only the first evaporating pipe and the second evaporating pipe which are correspondingly arranged in one evaporating chamber are cleaned at a time, and each evaporating chamber is cleaned in turn.
And under the cleaning working condition of the evaporating pipe, closing the drain valve at the bottom of the evaporating chamber during cleaning. Because the spray header above the evaporating pipes is in a continuous spraying state, the liquid level in the evaporating chambers is continuously increased, and the first evaporating pipes, the second evaporating pipes and the corresponding ultrasonic generators are submerged. Then, the ultrasonic generator is started to enable the ultrasonic vibration rod to generate ultrasonic with the frequency of more than 20kHz, and crystallization substances attached to the evaporation coil are dispersed and peeled off by utilizing cavitation, acceleration and direct current of the ultrasonic in the liquid, so that the aim of cleaning is achieved. After the ultrasonic cleaning is finished, the ultrasonic generator is closed, the liquid discharge valve at the bottom is opened, the cleaning wastewater in the evaporation chamber is discharged, and then the evaporation pipe in the evaporation chamber is restored to the normal heat exchange evaporation state of the wastewater. According to the steps, the cleaning of the evaporating pipes of the next evaporating chamber is started until the cleaning of the evaporating pipes of all the evaporating chambers is completed.
In the embodiment, the provided high-salt organic wastewater continuous treatment evaporation tower is provided with a plurality of evaporation chambers which are arranged side by side, each evaporation chamber comprises a forward flow evaporation zone, a reverse flow evaporation zone and a bottom air guide zone, and a liquid outlet is arranged at the bottom of each air guide zone; each concurrent evaporation zone is provided with a first spray header and a first evaporation pipe, and each countercurrent evaporation zone is internally provided with a second spray header and a second evaporation pipe. According to the high-salt organic wastewater continuous treatment evaporation tower with the optimal design, the evaporation coil is cleaned on line, the evaporation coil is not required to be stopped during cleaning, and the waste water is utilized for cleaning, so that no additional cleaning waste water is generated, the continuous treatment of the waste water by the evaporation tower is realized, the effective operation time of the system is greatly prolonged, and the waste water treatment capacity of the system is improved; through setting up downstream evaporation zone and countercurrent evaporation zone to the evaporation chamber, can improve heat transfer efficiency, and can furthest utilize the wind channel space, reduced evaporation chamber cleaning water volume as far as possible, reduce the long period of washing early stage retaining.
In order to secure the evaporation effect, the first evaporation tube 31 includes a plurality of coil portions that are sequentially communicated and arranged in parallel in the air intake direction, and the second evaporation tube 32 includes a plurality of second coil portions that are sequentially communicated and arranged in parallel in the air intake direction.
Accordingly, the first ultrasonic wave generating means includes a first ultrasonic wave generator and a first ultrasonic vibration rod 81 connected to the first ultrasonic wave generator, the first ultrasonic vibration rod 81 extending in a direction perpendicular to the coil pipe portion. The second ultrasonic wave generating means includes a second ultrasonic wave generator and a second ultrasonic vibration rod 82 connected to the second ultrasonic wave generator, the second ultrasonic vibration rod 82 extending in a direction perpendicular to the coil pipe portion. The ultrasonic vibration rod extends along the direction vertical to the coil pipe parts, and the cleaning effect of each coil pipe part is ensured during cleaning.
In a specific design, the first ultrasonic vibration rod 81 is located below the first evaporation tube 31, and the second ultrasonic vibration rod 82 is located below the second evaporation tube 32.
In practical design, the evaporating pipes in the evaporating chambers are continuously supplied with refrigerant through the main pipeline for the convenience of pipeline connection. Therefore, during the cleaning process of the evaporating tube group in one evaporating chamber, the waste water gradually rises in the evaporating chamber along with the closing of the bottom liquid discharge valve, and the heat accumulated by the waste water is increased due to the action of the evaporating tube. Therefore, in the specific design mode of the partition board, the partition board comprises an air inlet part 11, a liquid separation part 12 and an air outlet part 13 which are sequentially connected, wherein the air inlet part 11 is positioned in an air inlet cavity, the liquid separation part 12 is positioned in an air guide cavity, the air outlet part 13 is positioned in an air outlet cavity, and the heights of the air inlet part 11 and the air outlet part 13 are different. When the liquid level of the evaporating chambers reaches the height of the partition plates between the adjacent evaporating regions, under the action of the height difference, the waste water starts to overflow from the evaporating regions of the evaporating chambers to the evaporating regions of the adjacent evaporating chambers, and the waste water in the evaporating chambers can keep a flowing state from the downstream evaporating regions to the upstream evaporating regions, so that the accumulation of heat is reduced. Preferably, the height of the air inlet portion 11 is greater than that of the air outlet portion 13, and the liquid is further pushed to flow in the direction of the countercurrent evaporation area under the action of the air pressure difference, so that the liquid overflows to the adjacent countercurrent evaporation area through the lower partition plate.
In actual operation, the liquid outlet can be provided with a pressure sensor 9 for detecting the pressure of the waste water in the evaporating chamber, and when the pressure at the bottom of the evaporating chamber reaches a certain value and no change occurs, the liquid level in the evaporating chamber is judged to be full, the evaporating pipe and the ultrasonic generator are in a complete immersed state, and the ultrasonic generator can start cleaning.
In order to avoid the disturbance influence on the air path when the evaporated waste liquid is discharged from the bottom liquid outlet, in the specific design mode of the air guide area, the air guide plate 2 arranged on the liquid separation part 12 is provided with an arc-shaped structure extending from the downstream evaporation area to the countercurrent evaporation area, so that the introduced air of the air inlet is ensured to pass through the air flow trend of the air inlet cavity, the air guide cavity and the air outlet cavity in sequence.
In addition, when the organic matter high-salt wastewater is treated, the evaporated gas can carry more fog drops and droplets (mainly organic matters) and is required to be intercepted by a foam catcher so as to ensure the water quality of the effluent of the evaporation tower. The existing foam-catching device is of a flat-type baffle plate structure, and the foam-catching device needs to have a certain thickness, so that mist drops or spray can form effective collision when passing through a gap of the baffle plate, and can be gathered into larger drops which fall back into the evaporation tower under the action of gravity, thereby achieving the purpose of removing foam. In the running process, liquid drops or droplets can be formed continuously under the action of hot air to adhere and accumulate on the surface of the baffle plate, so that the gap of the baffle plate is gradually reduced, the wind resistance is increased, the heat exchange effect between the cold end and the hot end of the system is poor, and the heat balance is gradually not maintained, so that the foam catcher is required to be cleaned to recover the ventilation capacity of the foam catcher. There are two conventional cleaning methods: firstly, the front and back sides of the foam catcher are cleaned by a high-pressure water gun for manual work, so that the cleaning effect is good, but time and labor are wasted; the second is that a high-pressure nozzle is arranged above the foam catcher, condensed water generated by the access system is washed, a large number of nozzles are needed to be arranged to ensure that the washing water can fully cover the upper part of the foam catcher, but the washing force of washing water only has a better washing effect on the upper middle part of the foam catcher due to the blocking effect of the baffle plate, and basically has no washing effect on the lower part and the bottom of the foam catcher; the third is that on the basis of the second, a nozzle is arranged at the bottom of the foam catcher (the nozzle is upwards), but the upwards spraying effect of the nozzle is greatly reduced under the influence of gravity, and meanwhile, drops containing crystals falling back from the foam catcher also block the nozzle.
Thus, referring to fig. 4, in a specific design of the mist eliminator, the mist eliminator 4 includes a first end plate 41, a second end plate 42, and a plurality of baffle plates 43 installed between the two end plates, the plurality of baffle plates 43 being distributed circumferentially. The foam catcher is designed into a roller-shaped structure, so that the foam catcher can be washed on the circumferential surface of the foam catcher without dead angles by rotating the foam catcher during washing while the foam catcher is guaranteed to have a foam catching effect under an evaporation working condition.
Since the waste cleaning liquid of the foam catcher contains organic matters evaporated from the waste water, the waste cleaning liquid needs to be recovered and discharged. Therefore, the high-salt organic wastewater continuous treatment evaporation tower of this embodiment further includes: the cleaning spraying mechanism is rotatably arranged in the air outlet cavity, and the cleaning spraying mechanism is arranged in the air outlet cavity and used for cleaning the foam catcher 4. The foam-catching device is washed in the tower body through the cleaning spraying mechanism, and the washing waste liquid is directly discharged through the liquid outlet, so that the uniform recovery treatment is facilitated.
In a specific arrangement manner of the baffle plate, the baffle plate 43 forms a preset included angle with the radial direction of the circumference, so as to ensure the foam capturing effect in all directions. Meanwhile, in order to realize thorough cleaning of the foam traps in the circumferential direction, the foam traps are rotated in the spraying process. In a specific design manner, an opening is formed in the middle of the first end plate 41, a plurality of baffle plates 43 are distributed around the opening along an annular shape, the cleaning spraying mechanism comprises an inner wall spraying unit 61 and an outer wall spraying unit 62, the outer wall spraying unit 62 is located above the foam catcher 4, and one end of the inner wall spraying unit 61 penetrates through the opening to extend into the foam catcher 4. Through the setting of inner wall spray unit and outer wall spray unit, guarantee the both sides cleaning performance of every baffle. In a further design, in order to avoid corrosion of the spray heads caused by falling of the flushing waste water, the spray heads of the inner wall spray unit and the outer wall spray unit are arranged downwards. Specifically, the plurality of spray heads of the inner wall spray unit are sequentially arranged along the axial direction of the foam catcher, and the plurality of spray heads of the outer wall spray unit are sequentially arranged along the axial direction of the foam catcher, so that the minimum spray heads meet the overall cleaning requirement, and the cleaning water quantity is saved.
Accordingly, in order to facilitate the arrangement of the inner and outer spray units, referring to fig. 3, in a specific installation mode of the foam trap, a support frame 44 for installing the foam trap 4 is further provided in the tower body 1, the first end plate 41 and the second end plate 42 have a coaxially arranged circular structure, and a first rail wheel 45 group and a second rail wheel 45 group for supporting the first end plate 41 and the second end plate 42 respectively are provided on the support frame 44, and rail wheels 45 of each rail wheel 45 group are distributed around the corresponding end plate. When spraying, the foam catcher can be rotated manually or electrically. Through the design of rail wheel, the dismantlement of the cylinder-shaped foam-catching device of being convenient for, when circumference washs simultaneously, avoid middle part design pivot support to influence the washing effect.
In the specific cleaning process of the foam catcher, the foam catcher is driven by hand or electric to slowly and uniformly rotate at a preset linear speed, meanwhile, no impurity water source exists in the inner periphery and the outer Zhou Penlin of the foam catcher by the cleaning spraying mechanism, and cleaning is stopped after the set cleaning time is reached.
Through the design, the foam catcher is rotatably arranged in the tower body, and the foam catcher needs to be fixed during working in order to ensure the effect of the foam catcher under the evaporation working condition. Therefore, referring to fig. 5, in the specific installation mode of the foam breaker, the foam breaker 4 further includes a locking cover 46, a rotating shaft 47 extending horizontally is provided on the second end plate 42, an installation part extending outwards is provided on the outer wall of the tower body 1, an installation hole for the rotating shaft 47 to penetrate is provided in the middle of the installation part, an external thread is provided on the outer wall of the installation part, a limiting protrusion 470 is provided on the outer wall of the rotating shaft 47, the limiting protrusion 470 is located on one side of the installation part away from the second end plate 42, a circumferential limiting structure 101 matched with the limiting protrusion 470 is provided on one side of the installation part towards the side of the limiting protrusion 470, the locking cover 46 is located on one side of the installation part away from the limiting protrusion 470, an opening is provided in the middle of the locking cover 46, and the external thread of the rotating shaft 47 is sleeved on the installation part through the opening.
Under the evaporation working condition, the limiting protrusions are pressed on the circumferential limiting structure 101 of the mounting portion through the locking cover, the rotation of the rotating shaft is limited, and then the foam capturing effect is guaranteed. Under the cleaning working condition, the locking cover is loosened, and the foam catcher is driven to rotate manually or electrically so as to realize comprehensive cleaning. Specifically, when the specific design of circumference limit structure, can set up the rubber pad at installation department tip, compress tightly spacing protruding on the rubber pad through the locking lid when locking and realize circumference spacing, guarantee the seal of installation department opening part simultaneously.
When judging the cleaning critical point of the foam trap, the evaporation tower of this embodiment further includes a differential pressure sensor 10, the sidewall of the air outlet cavity is provided with a first detection port and a second detection port, the first detection port is located above the foam trap 4, the second detection port is located between the foam trap 4 and the second spray header 52, and the differential pressure sensor 10 is installed on a detection pipeline between the first detection port and the second detection port. The passing efficiency of the foam trap is judged by detecting the up-down pressure difference of the foam trap through a pressure difference sensor.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. A high-salt organic wastewater continuous treatment evaporation tower, which is characterized by comprising: the device comprises a tower body (1), a foam catcher (4), an evaporation tube group, a waste water spraying mechanism, a plurality of first ultrasonic wave generating devices and a plurality of second ultrasonic wave generating devices;
An air inlet cavity, an air guide cavity and an air outlet cavity are arranged in the tower body (1), the air inlet cavity and the air outlet cavity are arranged side by side, the bottoms of the air inlet cavity and the air outlet cavity are communicated through the air guide cavity, an air inlet is formed in the top of the air inlet cavity, and an air outlet is formed in the top of the air outlet cavity;
a plurality of partition boards which are arranged side by side are arranged in the tower body (1), the partition boards extend into the air outlet cavity from the air inlet cavity through the air guide cavity along the air inlet direction, a plurality of concurrent evaporation areas which are arranged side by side are formed in the air inlet cavity, a plurality of air guide areas which are arranged side by side are formed in the air guide cavity, and a plurality of countercurrent evaporation areas which are arranged side by side are formed in the air outlet cavity; each concurrent evaporation zone is respectively communicated with one air guide zone and one countercurrent evaporation zone in sequence to form an evaporation chamber, the bottom of each air guide zone is provided with a liquid outlet, and the liquid outlet is provided with a liquid outlet valve;
The waste water spraying mechanism comprises a plurality of first spraying heads (51) and a plurality of second spraying heads (52), each first spraying head and each first evaporation pipe (31) are positioned in one concurrent evaporation zone, the first spraying heads (51) are positioned above the first evaporation pipes (31), each second spraying head and each second evaporation pipe (32) are positioned in one countercurrent evaporation zone, and the second spraying heads (52) are positioned above the second evaporation pipes (32);
each first ultrasonic wave generating device is used for carrying out ultrasonic wave cleaning on a first evaporation tube in a concurrent evaporation zone, and each second ultrasonic wave generating device is used for carrying out ultrasonic wave cleaning on a second evaporation tube in a countercurrent evaporation zone;
The foam catcher (4) is positioned in the air outlet cavity and above the countercurrent evaporation zone;
The first ultrasonic generating device comprises a first ultrasonic generator and a first ultrasonic vibration rod (81) connected with the first ultrasonic generator;
The second ultrasonic generating device comprises a second ultrasonic generator and a second ultrasonic vibration rod (82) connected with the second ultrasonic generator;
the first ultrasonic vibration rod (81) is positioned below the first evaporation tube (31), and the second ultrasonic vibration rod (82) is positioned below the second evaporation tube (32);
Closing a drain valve at the bottom of an evaporation chamber under the cleaning working condition of the evaporation pipes, and starting an ultrasonic generator when the liquid level in the evaporation chamber submerges the first evaporation pipe (31), the second evaporation pipe (32) and the corresponding ultrasonic generator; after the cleaning is finished, a liquid discharge valve at the bottom of the evaporation chamber is opened to discharge liquid; repeating the steps, starting the cleaning of the evaporating pipes of the next evaporating chamber until the cleaning of all the evaporating chambers is completed.
2. The high-salt organic wastewater continuous treatment evaporation tower according to claim 1, wherein the partition plate comprises an air inlet part (11), a liquid separation part (12) and an air outlet part (13) which are sequentially connected, the air inlet part (11) is positioned in an air inlet cavity, the liquid separation part (12) is positioned in an air guide cavity, the air outlet part (13) is positioned in an air outlet cavity, and the heights of the air inlet part (11) and the air outlet part (13) are different.
3. The high-salt organic wastewater continuous treatment evaporation tower according to claim 2, wherein the height of the air inlet portion (11) is greater than the height of the air outlet portion (13).
4. The evaporation tower for continuous treatment of high-salt organic wastewater according to claim 2, wherein the air deflector (2) is provided on the liquid separation part (12), and the air deflector (2) has an arc-shaped structure extending from the downstream evaporation zone to the upstream evaporation zone.
5. The high-salt organic wastewater continuous treatment evaporation tower according to claim 1, wherein the first evaporation pipe (31) comprises a plurality of first coil pipe portions which are communicated in sequence and are arranged in parallel along the air inlet direction;
and/or the second evaporator tube (32) comprises a plurality of second coil sections.
6. The evaporation tower for continuous treatment of high-salt organic wastewater according to claim 1, wherein a pressure sensor (9) is arranged at each liquid outlet, and the ultrasonic generator is started according to the detection result of the pressure sensor.
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| CN202310968449.6A CN117003319B (en) | 2023-08-02 | 2023-08-02 | High-salt organic wastewater continuous treatment evaporation tower |
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| CN202310968449.6A CN117003319B (en) | 2023-08-02 | 2023-08-02 | High-salt organic wastewater continuous treatment evaporation tower |
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| CN117003319B true CN117003319B (en) | 2024-06-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113603172A (en) * | 2021-07-26 | 2021-11-05 | 安徽同速科技有限公司 | Self-cleaning plate type falling film evaporation system for industrial wastewater treatment |
| CN214990393U (en) * | 2021-02-07 | 2021-12-03 | 南京通用电气装备有限公司 | Long-path ventilation cavity of evaporation tower |
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| CN112225275A (en) * | 2020-10-29 | 2021-01-15 | 南京师范大学镇江创新发展研究院 | Contain high-efficient evaporation plant of salt organic waste water and system |
| CN217498729U (en) * | 2022-05-16 | 2022-09-27 | 苏州新坤远环保技术有限公司 | Negative pressure evaporation kettle with ultrasonic cleaning and accelerated evaporation functions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN214990393U (en) * | 2021-02-07 | 2021-12-03 | 南京通用电气装备有限公司 | Long-path ventilation cavity of evaporation tower |
| CN113603172A (en) * | 2021-07-26 | 2021-11-05 | 安徽同速科技有限公司 | Self-cleaning plate type falling film evaporation system for industrial wastewater treatment |
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