CN115025505A - Falling film evaporation separation method and device - Google Patents
Falling film evaporation separation method and device Download PDFInfo
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- CN115025505A CN115025505A CN202210958010.0A CN202210958010A CN115025505A CN 115025505 A CN115025505 A CN 115025505A CN 202210958010 A CN202210958010 A CN 202210958010A CN 115025505 A CN115025505 A CN 115025505A
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- separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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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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- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to the technical field of falling film evaporation, and discloses a falling film evaporation separation method and a falling film evaporation separation device, which comprise a falling film evaporator and a separator connected with the falling film evaporator, wherein a concentrated liquid outlet end of the falling film evaporator is provided with a circulating separation assembly, the circulating separation assembly comprises a solid-liquid separation tank, the top of the solid-liquid separation tank is provided with a liquid inlet hopper, and the liquid inlet hopper is connected with the bottom of the falling film evaporator; take out the top of the inside discharge end of evaporimeter and spray with the combination circulation, make the combination clear away the inside foam that forms of evaporimeter, because the combination is the combination of broken foam granule and concentrate, broken foam granule can effectively puncture the foam, and the concentrate is the transport medium, itself can not influence the purity of the concentrate after the separation, consequently, can be under the condition that does not influence concentrate purity, high-efficient broken foam, and simultaneously, adopt the mode of spraying and clearing away, can not influence the discharge of concentrate and steam, avoid influencing the efficiency of evaporative separation.
Description
Technical Field
The invention relates to the technical field of falling film evaporation, in particular to a falling film evaporation separation method and a falling film evaporation separation device.
Background
The falling film evaporation is that the feed liquid is added from an upper pipe box of a heating chamber of the falling film evaporator, is uniformly distributed into each heat exchange pipe through a liquid distribution and film forming device, and flows from top to bottom in a uniform film shape under the action of gravity, vacuum induction and airflow. In the flowing process, the shell-pass heating medium is heated and vaporized, the generated steam and the liquid phase enter a separation chamber of the evaporator together, the steam and the liquid are fully separated, the steam enters a condenser for condensation (single-effect operation) or enters a next-effect evaporator as the heating medium, so that the multi-effect operation is realized, and the liquid phase is discharged from the separation chamber.
Among the prior art, the mechanism that the foam was got rid of adopts the silk screen demister more or blocks the structure, and the silk screen demister comprises tiny network structure, and behind the silk screen demister, the foam was clear away to the mixture of foam and liquid, but the silk screen demister etc. blocks the structure and can influence the discharge of concentrate, needs longer time to get rid of, comparatively influences the efficiency of vaporization separation, in addition, adopts jet-propelled or water spray mode to get rid of, then can influence the vacuum of device and reduce the purity of concentrate.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a falling film evaporation separation method and a falling film evaporation separation device, which have the advantage of improving the separation efficiency and solve the problems of low steam separation efficiency, influence on the vacuum degree and reduction of the purity of a concentrated solution.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a falling film evaporation separation device comprises a falling film evaporator and a separator connected with the falling film evaporator, wherein a concentrated liquid outlet end of the falling film evaporator is provided with a circulating separation assembly, the circulating separation assembly comprises a solid-liquid separation tank, the top of the solid-liquid separation tank is provided with a liquid inlet hopper, the liquid inlet hopper is connected with the bottom of the falling film evaporator, a solid-liquid separation net is arranged inside the solid-liquid separation tank, a water level sensor is installed on the inner side wall of the solid-liquid separation tank, the liquid outlet end of the bottom of the solid-liquid separation tank is provided with an electromagnetic valve, the bottom of the electromagnetic valve is fixedly connected with a liquid outlet pipe, the feed end of the solid-liquid separation tank is provided with a feed hopper, and the feed hopper is used for throwing foam breaking particles;
one side of circulation separation subassembly is connected with the circulation and sprays the subassembly, the circulation sprays the subassembly and includes the circulating pipe, the one end of circulating pipe is connected with the electromagnetism three-way valve, a port of electromagnetism three-way valve is connected with the circulating pump, the drawing liquid end of circulating pump is equipped with the drawing liquid fill, the drawing liquid fill is located the inside of solid-liquid separation jar is close to one side of solid-liquid separation net, the inside of falling film evaporation ware is equipped with the spray tube, the one end of spray tube with the circulating pipe links to each other, the sprinkler head is installed to the lateral wall of spray tube.
Preferably, the solid-liquid separation screen is inclined by thirty degrees in the counterclockwise direction along the horizontal plane.
Preferably, the electromagnetic three-way valve is a plate-type electromagnetic valve.
Preferably, the outer end of the liquid pumping hopper is horn-shaped.
Preferably, the number of the spray heads is five, and the spray buttons of the spray heads are in a wide-mouth shape.
Preferably, another port department of electromagnetism three-way valve is equipped with vortex separation subassembly, vortex separation subassembly is used for separating solid-liquid.
Preferably, the vortex separation subassembly advances the pipe including the separation, the one end that the pipe was advanced in the separation with the electromagnetism three-way valve links to each other, the other end that the pipe was advanced in the separation is connected with the vortex separation pipe, the solid discharge end of vortex separation pipe is equipped with the impurity discharge pipe, the liquid discharge end of vortex separation pipe is equipped with the concentrate recovery tube, be equipped with the recovery pump on the concentrate recovery tube, the play liquid end of recovery pump with the drain pipe links to each other, the inside of vortex separation pipe has helical blade.
Preferably, the foam breaking particles are cubes with protrusions on the outer portion.
A falling film evaporation separation method comprises the following steps:
s1: selecting the material of the foam breaking particles according to the solution to be evaporated and separated, so that the material of the foam breaking particles does not react with the evaporated solution;
s2: before evaporation separation begins, foam breaking particles are put into a circulating separation component;
s3: controlling an electromagnetic three-way valve to enable a circulating pipe controlled by the electromagnetic three-way valve to be communicated with a circulating pump;
s4: starting to carry out evaporation separation operation;
s5: the separated concentrated solution enters a solid-liquid separation tank, so that the concentrated solution is combined with the foam breaking particles;
s6: starting a circulating pump, pumping the combination on the upper layer of the solid-liquid separation screen into a spraying pipe by the circulating pump through the circulating pipe, and spraying the combination by a spraying head to remove foam generated in the falling film evaporator;
s7: the circulating spraying assembly works circularly to continuously remove the foam;
s8: after the evaporation separation operation is finished, controlling an electromagnetic three-way valve to enable the electromagnetic three-way valve to control a circulating pump to be communicated with the vortex separation assembly;
s9: the vortex separation component separates the crystallized particles and the foam breaking particles from the concentrated solution, so that the concentrated solution and the foam breaking particles can be recycled, and the crystallized particles are removed.
(III) advantageous effects
Compared with the prior art, the invention provides a falling film evaporation separation method and a falling film evaporation separation device, which have the following beneficial effects:
the falling film evaporation separation method and the falling film evaporation separation device combine the defoaming particles with the three-dimensional structure and the concentrated solution to form a combined body, and then the combined body is circularly pumped to the upper part of the discharging end in the evaporator and sprayed to remove the foam formed in the evaporator.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a connection relationship diagram of the falling film evaporator, the circulation separation assembly, the circulation spraying assembly and the vortex separation assembly in the invention;
FIG. 3 is a schematic view of the structure of the circulation separation module according to the present invention;
FIG. 4 is a schematic view of the circulating spray assembly of the present invention;
FIG. 5 is a schematic structural view of a vortex separation assembly of the present invention;
fig. 6 is an external view of the present invention of a foam breaking particle.
In the figure: 10. a falling film evaporator;
20. a separator;
30. a cyclical separation assembly; 31. a solid-liquid separation tank; 32. a liquid inlet hopper; 33. a solid-liquid separation screen; 34. a water level sensor; 35. an electromagnetic valve; 36. a liquid outlet pipe; 37. a feed hopper;
40. a circulating spray assembly; 41. a circulation pipe; 42. an electromagnetic three-way valve; 43. a circulation pump; 44. a liquid pumping hopper; 45. a spray tube; 46. a sprinkler head;
50. a vortex separation assembly; 51. separating the inlet pipe; 52. a vortex separation tube; 53. an impurity discharge pipe; 54. a concentrate recovery pipe; 55. and (5) recovering the pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A falling film evaporation separation device comprises a falling film evaporator 10 and a separator 20 connected with the falling film evaporator 10, wherein a concentrated liquid outlet end of the falling film evaporator 10 is provided with a circulation separation assembly 30, the circulation separation assembly 30 comprises a solid-liquid separation tank 31, the top of the solid-liquid separation tank 31 is provided with a liquid inlet hopper 32, the liquid inlet hopper 32 is connected with the bottom of the falling film evaporator 10, the solid-liquid separation tank 31 is internally provided with a solid-liquid separation screen 33, the inner side wall of the solid-liquid separation tank 31 is provided with a water level sensor 34, the liquid outlet end of the bottom of the solid-liquid separation tank 31 is provided with an electromagnetic valve 35, the bottom of the electromagnetic valve 35 is fixedly connected with a liquid outlet pipe 36, the feed end of the solid-liquid separation tank 31 is provided with a feed hopper 37, and the feed hopper 37 is used for throwing foam breaking particles;
one side of the circulation separation component 30 is connected with a circulation spraying component 40, the circulation spraying component 40 comprises a circulation pipe 41, one end of the circulation pipe 41 is connected with an electromagnetic three-way valve 42, one port of the electromagnetic three-way valve 42 is connected with a circulation pump 43, a liquid pumping end of the circulation pump 43 is provided with a liquid pumping hopper 44, the liquid pumping hopper 44 is positioned on one side, close to the solid-liquid separation screen 33, inside the solid-liquid separation tank 31, a spraying pipe 45 is arranged inside the falling film evaporator 10, one end of the spraying pipe 45 is connected with the circulation pipe 41, and a spraying head 46 is installed on the outer side wall of the spraying pipe 45.
In this embodiment, specifically, the solid-liquid separation screen 33 is inclined by thirty degrees in the counterclockwise direction of the horizontal plane, and the foam breaking particles are conveniently dropped along the inclined plane by horizontally arranging the solid-liquid separation screen 33.
In this embodiment, specifically, the electromagnetic three-way valve 42 is a plate-type electromagnetic valve, and the plate-type electromagnetic valve has good anti-blocking performance, so that the blockage in the particle valve can be effectively avoided.
In this embodiment, specifically, the outer end of the liquid pumping funnel 44 is in a trumpet shape, and the trumpet-shaped liquid pumping funnel 44 can rapidly extract the combined body.
In this embodiment, specifically, there are five spraying heads 46, the spraying buttons of the spraying heads 46 are in a wide-mouth shape, the five spraying heads 46 spray the combination at the same time, so as to increase the spraying and crushing range, and the wide-mouth spraying heads 46 may further increase the spraying and crushing range.
In this embodiment, specifically, a vortex separation assembly 50 is disposed at the other port of the electromagnetic three-way valve 42, the vortex separation assembly 50 is used for separating solid from liquid, and the combined body and mixed crystals enter the vortex separation assembly 50 to separate solid from liquid in the mixed body from crystals.
In this embodiment, specifically, the vortex separation assembly 50 includes a separation inlet pipe 51, one end of the separation inlet pipe 51 is connected to the electromagnetic three-way valve 42, the other end of the separation inlet pipe 51 is connected to the vortex separation pipe 52, a solid discharge end of the vortex separation pipe 52 is provided with an impurity discharge pipe 53, a liquid discharge end of the vortex separation pipe 52 is provided with a concentrated solution recovery pipe 54, the concentrated solution recovery pipe 54 is provided with a recovery pump 55, a liquid outlet end of the recovery pump 55 is connected to the liquid outlet pipe 36, a spiral blade is provided inside the vortex separation pipe 52, the electromagnetic three-way valve 42 controls the communication between the separation inlet pipe 51 and the circulation pump 43, when a combined body enters the vortex separation pipe 52, a vortex is formed through the spiral blade, and heavy particles and crystals are separated from the concentrated solution under the action of a centrifugal force.
In this embodiment, specifically, the foam breaking particles are cubes with protrusions on the outside, and the protrusions can effectively break foam.
Referring to fig. 1 to 6, in the present embodiment, the following steps are further provided:
s1: selecting the material of the foam breaking particles according to the solution to be evaporated and separated, so that the material of the foam breaking particles does not react with the evaporated solution;
s2: before starting evaporation separation, foam breaking particles are put into the circulating separation component 30;
s3: controlling the electromagnetic three-way valve 42 to enable the electromagnetic three-way valve 42 to control the circulating pipe 41 to be communicated with the circulating pump 43;
s4: starting to carry out evaporation separation operation;
s5: the separated concentrated solution enters a solid-liquid separation tank 31, so that the concentrated solution is combined with the foam breaking particles;
s6: starting the circulating pump 43, pumping the combination body on the upper layer of the solid-liquid separation screen 33 into the spraying pipe 45 by the circulating pump 43 through the circulating pipe 41, and spraying the combination body by the spraying head 46 to remove the foam generated in the falling film evaporator 10;
s7: the circulating spraying assembly 40 works circularly to continuously remove foams;
s8: after the evaporation separation operation is finished, controlling the electromagnetic three-way valve 42 to enable the electromagnetic three-way valve 42 to control the circulating pump 43 to be communicated with the vortex separation assembly 50;
s9: the vortex separation assembly 50 separates the crystallized particles and the foam breaking particles from the concentrated solution, so that the concentrated solution and the foam breaking particles can be recycled, and the crystallized particles are removed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A falling film evaporation separation device comprises a falling film evaporator (10) and a separator (20) connected with the falling film evaporator, and is characterized in that: the falling-film evaporator is characterized in that a circulating separation assembly (30) is arranged at a concentrated liquid outlet end of the falling-film evaporator (10), the circulating separation assembly (30) comprises a solid-liquid separation tank (31), a liquid inlet hopper (32) is arranged at the top of the solid-liquid separation tank (31), the liquid inlet hopper (32) is connected with the bottom of the falling-film evaporator (10), a solid-liquid separation screen (33) is arranged inside the solid-liquid separation tank (31), a water level sensor (34) is installed on the inner side wall of the solid-liquid separation tank (31), an electromagnetic valve (35) is arranged at a liquid outlet end at the bottom of the solid-liquid separation tank (31), a liquid outlet pipe (36) is fixedly connected to the bottom of the electromagnetic valve (35), a feed hopper (37) is arranged at a feed end of the solid-liquid separation tank (31), and the feed hopper (37) is used for throwing foam breaking particles;
one side of circulation separation subassembly (30) is connected with the circulation and sprays subassembly (40), the circulation sprays subassembly (40) including circulating pipe (41), the one end of circulating pipe (41) is connected with electromagnetism three-way valve (42), a port of electromagnetism three-way valve (42) is connected with circulating pump (43), the drawing liquid end of circulating pump (43) is equipped with drawing liquid fill (44), drawing liquid fill (44) are located the inside of solid-liquid separation jar (31) is close to one side of solid-liquid separation net (33), the inside of falling film evaporation ware (10) is equipped with spray tube (45), the one end of spray tube (45) with circulating pipe (41) link to each other, sprinkler head (46) are installed to the lateral wall of spray tube (45).
2. A falling film evaporative separation apparatus according to claim 1, wherein: the solid-liquid separation net (33) is inclined by thirty degrees along the counterclockwise direction of the horizontal plane.
3. A falling film evaporative separation apparatus according to claim 1, wherein: the electromagnetic three-way valve (42) is a plate type electromagnetic valve.
4. A falling film evaporative separation apparatus according to claim 1, wherein: the outer end of the liquid pumping hopper (44) is trumpet-shaped.
5. A falling film evaporative separation apparatus according to claim 1, wherein: the spraying heads (46) are provided with five spraying buttons, and the spraying buttons of the spraying heads (46) are in a wide-mouth shape.
6. A falling film evaporative separation apparatus according to claim 1, wherein: and a vortex separation assembly (50) is arranged at the other port of the electromagnetic three-way valve (42), and the vortex separation assembly (50) is used for separating solid from liquid.
7. A falling film evaporative separation apparatus according to claim 6, wherein: vortex separation subassembly (50) advance pipe (51) including the separation, the separation advance the one end of pipe (51) with electromagnetism three-way valve (42) link to each other, the separation advances the other end of pipe (51) and is connected with vortex separation pipe (52), the solid discharge end of vortex separation pipe (52) is equipped with impurity discharge pipe (53), the liquid discharge end of vortex separation pipe (52) is equipped with concentrate recovery tube (54), be equipped with recovery pump (55) on concentrate recovery tube (54), the play liquid end of recovery pump (55) with drain pipe (36) link to each other, the inside of vortex separation pipe (52) has helical blade.
8. A falling film evaporative separation apparatus according to claim 1, wherein: the foam breaking particles are cubes with bulges on the outer portion.
9. A falling film evaporative separation process, a falling film evaporative separation apparatus according to any one of claims 1 to 8, comprising the steps of:
s1: selecting the material of the foam breaking particles according to the solution to be evaporated and separated, so that the material of the foam breaking particles does not react with the evaporated solution;
s2: before the evaporation separation is started, foam breaking particles are put into a circulating separation component (30);
s3: controlling an electromagnetic three-way valve (42) to enable the electromagnetic three-way valve (42) to control the circulating pipe (41) to be communicated with a circulating pump (43);
s4: starting to carry out evaporation separation operation;
s5: the separated concentrated solution enters a solid-liquid separation tank (31) to combine the concentrated solution with the foam breaking particles;
s6: starting a circulating pump (43), pumping the combination body on the upper layer of the solid-liquid separation screen (33) into a spraying pipe (45) by the circulating pump (43) through a circulating pipe (41), and spraying the combination body out of a spraying head (46) to remove foam generated in the falling film evaporator (10);
s7: the circulating spraying assembly (40) works circularly to continuously remove the foam;
s8: after the evaporation separation operation is finished, controlling an electromagnetic three-way valve (42) to enable the electromagnetic three-way valve (42) to control a circulating pump (43) to be communicated with a vortex separation assembly (50);
s9: the vortex separation component (50) separates the crystallized particles and the foam breaking particles from the concentrated solution, so that the concentrated solution and the foam breaking particles can be recycled, and the crystallized particles are removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210958010.0A CN115025505A (en) | 2022-08-11 | 2022-08-11 | Falling film evaporation separation method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210958010.0A CN115025505A (en) | 2022-08-11 | 2022-08-11 | Falling film evaporation separation method and device |
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| CN115025505A true CN115025505A (en) | 2022-09-09 |
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| CN202210958010.0A Pending CN115025505A (en) | 2022-08-11 | 2022-08-11 | Falling film evaporation separation method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116443897A (en) * | 2023-04-17 | 2023-07-18 | 山东菜央子盐场有限公司 | Efficient brine preparing system with complementary brine |
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| CN207410597U (en) * | 2017-10-18 | 2018-05-25 | 四川英创力电子科技股份有限公司 | A kind of sandblasting defoaming device suitable for printed board manufacture |
| CN208244261U (en) * | 2018-04-17 | 2018-12-18 | 江西润家工程有限公司 | A kind of atomizing apparatus for purifying cutting liquid |
| CN212308890U (en) * | 2020-06-28 | 2021-01-08 | 太仓市宝马油脂设备有限公司 | Falling film distillation system for separating dichloromethane and white oil |
| CN212731082U (en) * | 2020-05-22 | 2021-03-19 | 天津科技大学 | Continuous evaporation concentration crystallization separation equipment |
| CN112755557A (en) * | 2021-02-07 | 2021-05-07 | 中国海洋石油集团有限公司 | Falling film evaporation device and separation method thereof |
-
2022
- 2022-08-11 CN CN202210958010.0A patent/CN115025505A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102641601A (en) * | 2011-02-16 | 2012-08-22 | 俞天翔 | In-tube auto-cleaning antiscale falling-film evaporation device |
| CN207410597U (en) * | 2017-10-18 | 2018-05-25 | 四川英创力电子科技股份有限公司 | A kind of sandblasting defoaming device suitable for printed board manufacture |
| CN208244261U (en) * | 2018-04-17 | 2018-12-18 | 江西润家工程有限公司 | A kind of atomizing apparatus for purifying cutting liquid |
| CN212731082U (en) * | 2020-05-22 | 2021-03-19 | 天津科技大学 | Continuous evaporation concentration crystallization separation equipment |
| CN212308890U (en) * | 2020-06-28 | 2021-01-08 | 太仓市宝马油脂设备有限公司 | Falling film distillation system for separating dichloromethane and white oil |
| CN112755557A (en) * | 2021-02-07 | 2021-05-07 | 中国海洋石油集团有限公司 | Falling film evaporation device and separation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116443897A (en) * | 2023-04-17 | 2023-07-18 | 山东菜央子盐场有限公司 | Efficient brine preparing system with complementary brine |
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