CN118221198A - Vibration plate type anti-scaling MVR evaporator - Google Patents
Vibration plate type anti-scaling MVR evaporator Download PDFInfo
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- CN118221198A CN118221198A CN202410307905.7A CN202410307905A CN118221198A CN 118221198 A CN118221198 A CN 118221198A CN 202410307905 A CN202410307905 A CN 202410307905A CN 118221198 A CN118221198 A CN 118221198A
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- 239000007788 liquid Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004809 Teflon Substances 0.000 claims abstract description 11
- 229920006362 Teflon® Polymers 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims description 31
- 238000007790 scraping Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 47
- 239000013078 crystal Substances 0.000 description 38
- 238000004140 cleaning Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 15
- 239000000126 substance Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920001600 hydrophobic polymer Polymers 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 150000002739 metals Chemical class 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
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 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
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- 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
- C02F1/042—Prevention of deposits
-
- 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
- C02F1/043—Details
-
- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention belongs to the field of evaporators in wastewater treatment industry, in particular to a vibration plate type anti-scaling MVR evaporator which comprises a raw liquid pump, a preheater, a forced circulation pump, a forced circulation heat exchanger, a separator, a compressor, a condensate water tank, a condensate water pump and a discharge pump which are connected with each other; an ultrasonic vibrator is arranged on the forced circulation heat exchanger, the ultrasonic vibrator is arranged at the cold side inlet of the forced circulation heat exchanger, and the ultrasonic vibrator is inserted into a through hole corresponding to the cold side inlet; the rod body of the ultrasonic vibrator is made of the same material as a circulating pipeline connected with the forced circulation heat exchanger, and the surface of the rod body of the ultrasonic vibrator is subjected to Teflon coating treatment; the ultrasonic vibrator and the forced circulation pump are synchronously started and stopped under the control of the PLC; the invention has simple structure, utilizes ultrasonic energy to interfere evaporation circulating water flow, prevents the surface structure of the plate, and strengthens the anti-scaling performance of the plate type forced circulation heat exchanger.
Description
Technical Field
The invention belongs to the field of evaporators in the wastewater treatment industry, and particularly relates to a vibration plate type anti-scaling MVR evaporator.
Background
The traditional industrial system of China is the industrial large country, all large, medium and small categories are covered in the traditional industrial system of China, the industrial system is complete, the industrial development is rapid, various and complex production wastewater types are brought, in most wastewater treatment processes, an evaporator is often used as main treatment equipment at the rear end in the process flow, the wastewater contains substances easy to scale, scaling phenomenon can occur in the treatment process of the traditional evaporator, cleaning is needed, and the problems of short cleaning period, time and labor waste, influence on the production efficiency of factories and the like are caused.
The scaling phenomenon of the evaporator is often reflected on the heat exchanger in a concentrated way, and the current cleaning mode generally has two modes of on-line medicament cleaning or off-line disassembly for manual cleaning: ① A large amount of liquid medicine needs to be prepared for online cleaning, the cost of the medicament is high, and the actual cleaning effect is limited; ② The labor intensity of offline unpicking and washing operation is high, and the washing time is long.
The invention of China patent CN202211524365.5 discloses and authorizes an online cleaning device for replacing an MVR evaporator plate, the invention still adopts an online cleaning mode, corresponding cleaning liquid is usually generated during online cleaning, and the cleaning liquid needs additional treatment, so that the treatment difficulty is increased.
The invention discloses and authorizes a plate-type hydrophobic polymer double-effect MVR system and a wastewater concentration method, wherein the plate-type hydrophobic polymer double-effect MVR system and the wastewater concentration method adopt hydrophobic organic materials as plates, but in practice, for wastewater with high viscosity, more suspended matters and high organic matter content, the organic materials are easier to cause carbonization and hardening of the plates compared with metals, and the anti-scaling design or coating treatment of the plates should be considered.
Based on the existing MVR anti-scaling design, the problem of scaling of the evaporator is not solved fundamentally by replacing a metal plate or optimizing a cleaning scheme of the evaporator, the problem of scaling of the heat exchanger is solved fundamentally, the invention is not limited by the root cause of the scaling, the vibration plate type anti-scaling MVR evaporator is invented, ultrasonic waves are introduced, the ultrasonic waves are directly contacted with water flow in the heat exchanger through the high combination of ultrasonic vibrators and the heat exchanger of the plate type MVR evaporator (the ultrasonic waves are utilized to interfere the water flow and transmit ultrasonic energy to the surface of the metal plate through the water flow), scaling substances are not easy to adhere to the metal plate, the problem of scaling of the heat exchanger is solved from the scaling cause, meanwhile, energy reduction caused by rubber gasket separation is avoided, and the production efficiency of the evaporator is improved;
Meanwhile, the plate dirt of the plate heat exchanger refers to a layer of solid or soft mud-like substance formed by gradually accumulating components or impurities in fluid on the surface of the heat exchange plate contacted with the plate dirt, the surface property of a heat exchange material is the most important factor influencing the formation of dirt, the surface energy of the material has great influence on the deposition of dirt particles, the adhesion possibility of the dirt substances is reduced by strengthening the performance of the plate heat exchanger, including plate type, fluid channel, surface treatment and the like, and the plate dirt acts together with an ultrasonic vibrator, so that the anti-scaling performance of the plate MVR evaporator is truly represented, and the problem of frequent scaling of the evaporator is solved from the source.
Disclosure of Invention
In order to make up the deficiency of the prior art, for the water quality with high viscosity and easy scaling, the ultrasonic energy generated by the ultrasonic vibrator is utilized to interfere the evaporation circulating water flow, thereby effectively preventing scaling substances from adhering to the metal surface of the heat exchanger under the high-temperature working condition, strengthening the anti-scaling performance of the plate type forced circulation heat exchanger, avoiding frequent scaling of the heat exchanger and improving the production efficiency of the evaporator.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a vibration plate type anti-scaling MVR evaporator, which comprises a raw liquid pump, a preheater, a forced circulation pump, a forced circulation heat exchanger, a separator, a compressor, a condensate water tank, a condensate water pump and a discharge pump which are connected with each other;
An ultrasonic vibrator is arranged on the forced circulation heat exchanger, the ultrasonic vibrator is arranged at the cold side inlet of the forced circulation heat exchanger, and the ultrasonic vibrator is inserted into a through hole corresponding to the cold side inlet;
The rod body of the ultrasonic vibrator is made of the same material as a circulating pipeline connected with the forced circulation heat exchanger, and the surface of the rod body of the ultrasonic vibrator is subjected to Teflon coating treatment;
and the ultrasonic vibrator and the forced circulation pump are synchronously started and stopped under the control of the PLC.
Preferably, the diameter of the rod body of the ultrasonic vibrator is smaller than 1/2 of the size of the circulating pipeline, the rod body of the ultrasonic vibrator is not contacted with the heat exchange plate in the through hole, the orientation of the ultrasonic vibrator is parallel to the direction of the through hole, and the length of the rod body of the ultrasonic vibrator is larger than or equal to 1/2 of the length of the through hole.
Preferably, the sound wave frequency of the ultrasonic vibrator is regulated between 28 and 40 KHz;
The forced circulation heat exchanger is of a plate type structure, the plates of the forced circulation heat exchanger are of wide channel plate type, and the surfaces of the plates are subjected to Teflon spraying treatment.
Preferably, the flow rate between the plates of the liquid in the forced circulation heat exchanger is 1.5-2.5m/s.
Preferably, the cold side inlet and the hot side inlet of the forced circulation heat exchanger are internally provided with the interception net, the pipelines of the cold side inlet and the hot side inlet are provided with the collecting cylinder, and the collecting cylinder is positioned at one side of the interception net away from the forced circulation heat exchanger.
Preferably, the middle position of the interception net is protruded, and the protruding part of the interception net faces to the direction opposite to the flowing direction of the liquid in the pipeline;
The device comprises a pipeline, a forced circulation heat exchanger, a blocking net, a mounting frame, a rotating shaft, blades, a scraping plate and a scraper, wherein the mounting frame is arranged on one side, far away from the forced circulation heat exchanger, of the blocking net in the pipeline;
The baffle is rotatably installed on the rotating shaft, the baffle is located between the blades and the mounting frame, the baffle is installed on the rotating shaft in a sleeved mode, two ends of the spring are fixedly connected to the mounting frame and the baffle respectively, the rotating shaft moves axially, and the interception net is installed in the pipeline through the elastic base.
Preferably, a blocking net is arranged at the opening of the collecting cylinder on the pipeline, and the blocking net is arranged on the collecting cylinder through a connecting rod.
Preferably, an elastic sheet is arranged on the edge of the blade, and the elastic sheet scratches the blocking net when the blade rotates;
The connecting rod is an elastic rod, an elastic ring is arranged at the edge of the blocking net, and the connecting rod is connected to the elastic ring through a bracket.
The beneficial effects of the invention are as follows:
1. According to the vibration plate type anti-scaling MVR evaporator, the strong sound field generated by the ultrasonic vibrator is used for contacting with water flow, so that circulating water flow of a forced circulation heat exchanger in the MVR plate type evaporator is directly interfered, energy is efficiently transferred through the water flow to act on a metal plate of the heat exchanger, and the anti-scaling performance of the plate of the forced circulation heat exchanger is enhanced.
2. According to the vibration plate type anti-scaling MVR evaporator, the plate is wide in channel and is subjected to Teflon surface treatment, so that the high-temperature scaling resistance of the plate of the forced circulation heat exchanger is further enhanced, the labor intensity caused by frequent offline cleaning of the evaporator is reduced, and meanwhile, the problem of secondary pollution of cleaning wastewater caused by online cleaning by adopting configuration cleaning liquid is avoided.
3. According to the vibration plate type anti-scaling MVR evaporator, the interception net, the blades, the scraping plates and the collecting cylinder are arranged to intercept and collect impurities and crystals in liquid entering the heat exchanger, so that the possibility of scaling on the plate in the heat exchanger is reduced, and the anti-scaling performance of the plate of the forced circulation heat exchanger is further improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a front view of a forced circulation heat exchanger interconnected with an ultrasonic transducer in the present invention;
Fig. 2 is a front view of an ultrasonic vibrator in the present invention;
FIG. 3 is a flow chart of a plate-type forced circulation MVR evaporator process of the present invention;
FIG. 4 is a side cross-sectional view of the connection of the forced circulation heat exchanger to the ultrasonic vibrator in the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is an enlarged view of a portion of FIG. 5 at B;
FIG. 7 is an enlarged view of a portion of FIG. 5 at C;
In the figure: raw liquid pump 1, preheater 2, forced circulation pump 3, forced circulation heat exchanger 4, cold side inlet 41, hot side inlet 42, collecting vessel 43, baffle net 44, connecting rod 441, elastic ring 442, interception net 45, leaf 46, mounting bracket 461, baffle 462, spring 463, scraper 47, ultrasonic vibrator 5, separator 6, compressor 7, condensate water tank 8, condensate water pump 9, and discharge pump 10.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 7, the vibration plate type anti-scaling MVR evaporator comprises a raw liquid pump 1, a preheater 2, a forced circulation pump 3, a forced circulation heat exchanger 4, a separator 6, a compressor 7, a condensate water tank 8, a condensate water pump 9 and a discharge pump 10 which are connected with each other;
An ultrasonic vibrator 5 is arranged on the forced circulation heat exchanger 4, the ultrasonic vibrator 5 is arranged at a cold side inlet 41 of the forced circulation heat exchanger 4, and the ultrasonic vibrator 5 is inserted into a through hole corresponding to the cold side inlet 41;
The rod body of the ultrasonic vibrator 5 is made of the same material as a circulating pipeline connected with the forced circulation heat exchanger 4, and the surface of the rod body of the ultrasonic vibrator 5 is subjected to Teflon coating treatment;
The ultrasonic vibrator 5 and the forced circulation pump 3 are synchronously started and stopped under the control of the PLC;
During operation, feed liquid is lifted by a feed liquid pump 1, heat exchange is carried out between a preheater 2 and condensed water, then the feed liquid is lifted to a certain temperature, then the feed liquid is lifted by a forced circulation pump 3 to a forced circulation heat exchanger 4, the feed liquid is heated to a design temperature and then enters a separator 6 for gas-liquid separation to generate secondary steam, the secondary steam is pressurized and heated by a compressor 7, then enters the forced circulation heat exchanger 4 to heat the feed liquid, the secondary steam is condensed into condensed water, then enters a condensed water tank 8, condensed water in the condensed water tank 8 is lifted by a condensed water pump 9 to the preheater 2 for heat exchange with the feed liquid and then is discharged out of the system, and simultaneously, the feed liquid in the separator 6 is evaporated to a certain concentration and is discharged out of the system by a bottom discharge pump 10, and in the process, under the action of an ultrasonic vibrator 5, scale-resistant saturated precipitated scale substances in the feed liquid are discharged out of the system along with the bottom discharge pump 10, so that the continuous contact and adhesion of the circulation of the feed liquid and the heat exchanger are avoided, and the scale-resistant effect is affected;
meanwhile, the ultrasonic generator arranged on the ultrasonic vibrator 5 is highly combined with the power cabinet of the evaporator, and the ultrasonic generator and the forced circulation pump 3 are linked and can be synchronously started and stopped through PLC control, so that the working state of the ultrasonic vibrator 5 is ensured to be synchronous with the evaporator, and the working of the ultrasonic vibrator 5 and the evaporator are prevented from being asynchronous, and the anti-scaling effect is influenced;
Meanwhile, the surface of the rod body of the ultrasonic vibrator 5 is covered with the Teflon coating, so that the ultrasonic vibrator 5 can be suitable for use environments of different types of sewage, and the influence of scaling of the rod body on ultrasonic transmission is avoided;
meanwhile, the ultrasonic vibrator 5 emits vibration energy to water flow around the ultrasonic vibrator within 360 degrees, and because the rod body is tangent to the heat exchange plate of the forced circulation heat exchanger 4, ultrasonic waves can tangentially and completely act on the flow passage between the plates of the heat exchanger, thereby avoiding partition failure of rubber parts such as sealing gaskets and the like and achieving the purpose of strengthening the anti-scaling performance.
As one embodiment of the invention, the diameter of the rod body of the ultrasonic vibrator 5 is smaller than 1/2 of the size of the circulating pipeline, the rod body of the ultrasonic vibrator 5 does not contact the heat exchange plate in the through hole, the orientation of the ultrasonic vibrator 5 is parallel to the direction of the through hole, and the length of the rod body of the ultrasonic vibrator 5 is greater than or equal to 1/2 of the length of the through hole;
When in installation and use, the bottom of the ultrasonic vibrator 5 is required to be provided with a flange interface, and the size of the flange interface is smaller than that of the circulating pipeline, so that the ultrasonic vibrator 5 and the circulating pipeline can be simply and smoothly installed and connected;
Meanwhile, as the ultrasonic vibrator 5 can be inserted into the through hole, the existence of the ultrasonic vibrator 5 can squeeze a part of liquid channels, so that the diameter of the ultrasonic vibrator 5 needs to be relatively smaller so as not to influence the normal flow of liquid in the heat exchanger or cause the too slow flow speed of the liquid in the heat exchanger, thereby influencing the anti-scaling effect.
As an implementation mode of the invention, the sound wave frequency of the ultrasonic vibrator 5 is adjusted between 28 KHz and 40 KHz;
The forced circulation heat exchanger 4 is of a plate type structure, a plate of the forced circulation heat exchanger 4 is of a wide channel plate type, and the surface of the plate is subjected to Teflon spraying treatment;
further carrying out Teflon surface spraying treatment on the surface of the heat exchanger plate, effectively solving the problem of combination of scaling substances and metal plates, adopting a wide channel plate shape for the plates, facilitating the flow of liquid between the heat exchanger plates, and further strengthening the scaling resistance of the MVR evaporator;
Meanwhile, the ultrasonic vibrator 5 capable of working in variable frequency is adopted, so that when feed liquid of a non-cylinder type is processed, the power of the ultrasonic vibrator 5 can be adjusted according to the scaling easiness of the feed liquid, and the purpose of energy saving is achieved under the condition of ensuring the scaling resistance effect.
As one embodiment of the invention, the flow rate between the plates of the liquid in the forced circulation heat exchanger 4 is 1.5-2.5m/s;
Through the selection to forced circulation pump 3 flow for the velocity of flow between the board reaches 1.5-2.5m/s, makes the velocity of flow between the board big, thereby guarantees that ultrasonic vibrator 5 reaches the effect that disturbs the evaporimeter circulation rivers, and then strengthens the anti scale deposit performance of the high turbulent flow of plate forced circulation heat exchanger 4, and also can avoid the velocity of flow too big, influences the heat transfer effect.
As an embodiment of the present invention, the cold side inlet 41 and the hot side inlet 42 of the forced circulation heat exchanger 4 are internally provided with an interception net 45, the pipes of the cold side inlet 41 and the hot side inlet 42 are provided with a collection cylinder 43, and the collection cylinder 43 is positioned at one side of the interception net 45 away from the forced circulation heat exchanger 4;
Through installing interception net 45 in the pipeline of cold side import 41, hot side import 42 department, to entering into the feed liquid in the forced circulation heat exchanger 4, impurity, crystallization that contain in the circulating water stream, reduce impurity and crystallization and enter into the heat exchanger, lead to the possibility of heat exchanger slab scale formation, simultaneously, install collection tube 43 in the pipeline for impurity and crystallization that is intercepted by interception net 45 can enter into collection tube 43, avoid too much impurity or crystallization to pile up in the pipeline, interception net 45 the place ahead, and then lead to interception net 45 to be blocked by impurity and crystallization, influence the normal use of heat exchanger.
As one embodiment of the present invention, the middle position of the interception net 45 is protruded, and the protruded part of the interception net 45 faces to the direction opposite to the flowing direction of the liquid in the pipeline;
a mounting frame 461 is arranged on one side, far away from the forced circulation heat exchanger 4, of the interception net 45 in the pipeline, a rotating shaft is rotatably arranged on the mounting frame 461, blades 46 and scraping plates 47 are arranged at two ends of the rotating shaft, and the scraping plates 47 are in contact with the surface of the interception net 45;
a baffle 462 is rotatably arranged on the rotating shaft, the baffle 462 is positioned between the leaf 46 and the mounting frame 461, the rotating shaft is sleeved with a 463, two ends of the spring 463 are respectively fixedly connected with the mounting frame 461 and the baffle 462, the rotating shaft moves axially, and the interception net 45 is arranged in a pipeline through a base with elasticity;
Since the middle position of the interception net 45 is protruded, after the interception net 45 intercepts impurities and crystals in the passing liquid, the impurities and the crystals can move along the surface of the interception net 45 towards the direction of the inner wall of the pipeline, so that the intercepted impurities and crystals are promoted to enter the collecting cylinder 43, the impurities and crystals are prevented from accumulating in front of the interception net 45 in the pipeline, and the normal work of the interception net 45 is influenced;
Meanwhile, when liquid in the pipeline passes through, the liquid drives the blades 46 to rotate, so that the scraping plates 47 coaxially arranged with the blades 46 rotate, the scraping plates 47 are further utilized to clean the surface of the interception net 45, impurities and crystals intercepted on the surface of the interception net 45 are promoted to fall off, so that the impurities and the crystals enter the collecting cylinder 43, meanwhile, the scraping plates 47 can also stir the impurities and the crystals moving along the surface of the interception net 45 towards the direction of the inner wall of the pipeline, so that the impurities and the crystals enter the collecting cylinder 43, and the impurities and the crystals are prevented from accumulating in the pipeline, so that the normal use of the heat exchanger is affected;
Meanwhile, as the two ends of the spring 463 are connected to the mounting frame 461 and the baffle 462, and the baffle 462 is rotatably mounted on the rotating shaft, the baffle 462 is not affected when the rotating shaft rotates, and when the blades 46 are impacted by liquid or the scrapers 47 encounter relatively large and hard impurities and crystals, the rotating shaft moves axially relative to the mounting frame 461, so that the scrapers 47 can cross the large or hard impurities on the interception net 45, the scrapers 47 are prevented from forcibly scraping the impurities and crystals, the interception net 45 is damaged, and meanwhile, the rotating shaft moves axially, so that vibration impact is generated on the interception net 45 when the interception net 45 is cleaned, the impurities attached to the surface of the interception net 45 are further promoted to fall off and are collected into the collecting cylinder 43, and the cleaning effect on the interception net 45 is improved.
As one embodiment of the invention, the collecting cylinder 43 is provided with a blocking net 44 at the opening of the pipeline, and the blocking net 44 is arranged on the collecting cylinder 43 through a connecting rod 441;
by installing the blocking net 44 at the opening of the collecting cylinder 43 on the pipeline, under the condition that impurities and crystals can smoothly pass through the mesh openings of the blocking net 44 and enter the collecting cylinder 43, the impurities and crystals which have entered the collecting cylinder 43 are blocked, so that the possibility that the impurities and crystals in the collecting cylinder 43 reenter the pipeline is reduced;
Meanwhile, when the impurities and crystals in the collection cylinder 43 are collected fully or the meshes of the blocking net 44 are blocked, a worker removes the collection cylinder 43 from the pipeline, and then the blocking net 44 mounted through the connecting rod 441 is removed together, so that the collection cylinder 43 and the blocking net 44 are cleaned, and normal operation of the blocking net 44 and the collection cylinder 43 is ensured.
As an embodiment of the present invention, an elastic sheet is mounted on the edge of the blade 46, and when the blade 46 rotates, the elastic sheet scratches the blocking net 44;
The connecting rod 441 is an elastic rod, an elastic ring 442 is installed at the edge of the blocking net 44, and the connecting rod 441 is connected to the elastic ring 442 through a bracket;
Because the blades 46 rotate to enable the elastic sheets to scratch the surface of the baffle net 44, so that part of impurities and crystals which are positioned on the surface of the baffle net 44 and cannot smoothly pass through the baffle net 44 to enter the collecting cylinder 43 pass through the baffle net 44 and enter the collecting cylinder 43 under the scratch and extrusion of the elastic sheets, the cleaning effect of the impurities and the crystals is ensured, in addition, due to the effect of the elastic sheets, the mesh diameter of the baffle net 44 is relatively smaller, the impurities and the crystals can pass through under the extrusion, the influence of liquid stirring in a pipeline on the liquid state in the collecting cylinder 43 can be reduced, and the possibility that the impurities and the crystals in the collecting cylinder 43 pass through the baffle net 44 again and enter the pipeline is reduced;
Meanwhile, since the elastic ring 442 is installed at the edge of the blocking net 44 and the blocking net 44 is installed on the collecting cylinder 43 through the elastic connecting rod 441, when the impurity or the crystal falling onto the blocking net 44 is relatively large and hard, the elastic sheet presses and scrapes the impurity so that the impurity or the crystal cannot pass through the mesh holes on the blocking net 44, the impurity or the crystal on the blocking net 44 can be driven by the stirring of the elastic sheet and the flowing of the liquid to be close to the edge of the blocking net 44, and then the impurity or the crystal is pressed from the edge of the blocking net 44 by the elastic sheet and passes through the blocking net 44, so that the collecting effect of the impurity or the crystal on the blocking net 44 is ensured.
The specific working procedure is as follows:
During operation, feed liquid is lifted by a feed liquid pump 1, heat exchange is carried out between a preheater 2 and condensed water, then the feed liquid is lifted to a certain temperature, then the feed liquid is lifted by a forced circulation pump 3 to a forced circulation heat exchanger 4, the feed liquid is heated to a design temperature and then enters a separator 6 for gas-liquid separation to generate secondary steam, the secondary steam is pressurized and heated by a compressor 7, then enters the forced circulation heat exchanger 4 to heat the feed liquid, the secondary steam is condensed into condensed water, then enters a condensed water tank 8, condensed water in the condensed water tank 8 is lifted by a condensed water pump 9 to the preheater 2 for heat exchange with the feed liquid and then is discharged out of the system, and simultaneously, the feed liquid in the separator 6 is evaporated to a certain concentration and is discharged out of the system by a bottom discharge pump 10, and in the process, under the action of an ultrasonic vibrator 5, scale-resistant saturated precipitated scale substances in the feed liquid are discharged out of the system along with the bottom discharge pump 10, so that the continuous contact and adhesion of the circulation of the feed liquid and the heat exchanger are avoided, and the scale-resistant effect is affected;
when in installation and use, the bottom of the ultrasonic vibrator 5 is required to be provided with a flange interface, and the size of the flange interface is smaller than that of a circulating pipeline;
further carrying out Teflon surface spraying treatment on the surface of the heat exchanger plate;
meanwhile, the ultrasonic vibrator 5 which can work in a variable frequency mode is adopted, so that when the feed liquid of a non-cylinder type is processed, the power of the ultrasonic vibrator 5 can be adjusted according to the scaling degree of the feed liquid;
The flow rate between the plates is 1.5-2.5m/s by selecting the flow rate of the forced circulation pump 3, so that the flow rate between the plates is high, and the effect of disturbing the circulating water flow of the evaporator by the ultrasonic vibrator 5 is ensured;
The intercepting net 45 is arranged in the pipeline at the cold side inlet 41 and the hot side inlet 42 to intercept the impurities and crystals contained in the feed liquid and the circulating water flow entering the forced circulation heat exchanger 4, and meanwhile, the collecting cylinder 43 is arranged in the pipeline, so that the impurities and crystals intercepted by the intercepting net 45 can enter the collecting cylinder 43;
since the middle position of the interception net 45 is protruded, after the interception net 45 intercepts impurities and crystals in the passing liquid, the impurities and crystals can move along the surface of the interception net 45 towards the direction of the inner wall of the pipeline, so that the intercepted impurities and crystals are promoted to enter the collecting cylinder 43;
Meanwhile, when the liquid in the pipeline passes through, the liquid drives the blades 46 to rotate, so that the scraping plates 47 coaxially arranged with the blades 46 rotate, the surfaces of the interception net 45 are further cleaned by the scraping plates 47, and the intercepted impurities and crystals on the surfaces of the interception net 45 are promoted to fall off, so that the impurities and crystals enter the collecting cylinder 43;
By installing the blocking net 44 at the opening of the collecting cylinder 43 on the pipeline, the impurities and crystals which have entered into the collecting cylinder 43 are blocked under the condition that the impurities and crystals can smoothly pass through the mesh openings on the blocking net 44 and enter into the collecting cylinder 43;
Because the blades 46 can make the elastic sheet scratch the surface of the baffle net 44 when rotating, thereby making a part be located on the surface of the baffle net 44, failing to pass through the baffle net 44 smoothly and enter the impurities and crystals in the collecting cylinder 43, under the scratch and extrusion of the elastic sheet, passing through the baffle net 44 and entering the collecting cylinder 43, ensuring the cleaning effect of the impurities and crystals, in addition, through the action of the elastic sheet, the mesh diameter on the baffle net 44 is relatively smaller, so that the impurities and crystals can pass through under extrusion, and the influence of liquid stirring in a pipeline on the liquid state in the collecting cylinder 43 and the possibility that the impurities and crystals in the collecting cylinder 43 pass through the baffle net 44 again and enter the pipeline can be reduced.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The vibration plate type anti-scaling MVR evaporator comprises a raw liquid pump (1), a preheater (2), a forced circulation pump (3), a forced circulation heat exchanger (4), a separator (6), a compressor (7), a condensate water tank (8), a condensate water pump (9) and a discharge pump (10) which are connected with each other;
The method is characterized in that: an ultrasonic vibrator (5) is arranged on the forced circulation heat exchanger (4), the ultrasonic vibrator (5) is arranged at a cold side inlet (41) of the forced circulation heat exchanger (4), and the ultrasonic vibrator (5) is inserted into a through hole corresponding to the cold side inlet (41);
The rod body of the ultrasonic vibrator (5) is made of the same material as a circulating pipeline connected with the forced circulation heat exchanger (4), and the surface of the rod body of the ultrasonic vibrator (5) is subjected to Teflon coating treatment;
the ultrasonic vibrator (5) and the forced circulation pump (3) are synchronously started and stopped under the control of the PLC.
2. The vibration plate type anti-scaling MVR evaporator according to claim 1, wherein: the diameter of the rod body of the ultrasonic vibrator (5) is smaller than 1/2 of the size of the circulating pipeline, the rod body of the ultrasonic vibrator (5) is not contacted with the heat exchange plate in the through hole, the orientation of the ultrasonic vibrator (5) is parallel to the direction of the through hole, and the length of the rod body of the ultrasonic vibrator (5) is larger than or equal to 1/2 of the length of the through hole.
3. The vibration plate type anti-scaling MVR evaporator according to claim 1, wherein: the sound wave frequency of the ultrasonic vibrator (5) is regulated between 28 KHz and 40 KHz;
The forced circulation heat exchanger (4) adopts a plate structure, a plate of the forced circulation heat exchanger (4) adopts a wide channel plate type, and the surface of the plate is subjected to Teflon spraying treatment.
4. The vibration plate type anti-scaling MVR evaporator according to claim 1, wherein: the flow rate between the plates of the liquid in the forced circulation heat exchanger (4) is 1.5-2.5m/s.
5. The vibration plate type anti-scaling MVR evaporator according to claim 1, wherein: an interception net (45) is arranged in a cold side inlet (41) and a hot side inlet (42) of the forced circulation heat exchanger (4), a collecting cylinder (43) is arranged on a pipeline of the cold side inlet (41) and the hot side inlet (42), and the collecting cylinder (43) is positioned on one side, far away from the forced circulation heat exchanger (4), of the interception net (45).
6. The vibration plate type anti-scaling MVR evaporator according to claim 5, wherein: the middle position of the interception net (45) is protruded, and the direction of the protruded part on the interception net (45) is opposite to the flowing direction of the liquid in the pipeline;
A mounting frame (461) is arranged on one side, far away from the forced circulation heat exchanger (4), of the interception net (45) in the pipeline, a rotating shaft is rotatably arranged on the mounting frame (461), blades (46) and scraping plates (47) are arranged at two ends of the rotating shaft, and the scraping plates (47) are in contact with the surface of the interception net (45);
The baffle (462) is rotatably installed in the rotating shaft, the baffle (462) is located between the blade (46) and the installation frame (461), the spring (463) is installed in the rotating shaft in a sleeved mode, two ends of the spring (463) are fixedly connected to the installation frame (461) and the baffle (462) respectively, the rotating shaft moves axially, and the interception net (45) is installed in a pipeline through a base with elasticity.
7. The vibration plate type anti-scaling MVR evaporator according to claim 6, wherein: the collecting cylinder (43) is provided with a blocking net (44) at an opening on the pipeline, and the blocking net (44) is arranged on the collecting cylinder (43) through a connecting rod (441).
8. The vibration plate type anti-scaling MVR evaporator according to claim 7, wherein: an elastic sheet is arranged on the edge of each blade (46), and the elastic sheet scratches the blocking net (44) when the blades (46) rotate;
The connecting rod (441) is an elastic rod, an elastic ring (442) is arranged at the edge of the blocking net (44), and the connecting rod (441) is connected to the elastic ring (442) through a bracket.
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| CN121230507A (en) * | 2025-11-27 | 2025-12-30 | 新疆西部明珠工程建设有限公司 | A waste heat furnace heat exchanger |
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|---|---|
| CN118221198B (en) | 2024-08-30 |
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