CN217745759U - Novel falling film scraper plate crystallization evaporator - Google Patents
Novel falling film scraper plate crystallization evaporator Download PDFInfo
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- CN217745759U CN217745759U CN202221851819.5U CN202221851819U CN217745759U CN 217745759 U CN217745759 U CN 217745759U CN 202221851819 U CN202221851819 U CN 202221851819U CN 217745759 U CN217745759 U CN 217745759U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model provides a novel falling liquid film scraper blade crystallization evaporator, includes scraper blade evaporator system, hot well, crystallization piece-rate system and energy recuperation system, scraper blade evaporator system includes evaporimeter heat transfer main part, spray set, heat exchange tube, steam condenser box, steam compressor and snaking scraper, spray set adorns in the inside upside of evaporimeter heat transfer main part, the spray set below is located to the heat exchange tube, the steam condenser box is connected with the heat exchange tube, evaporimeter heat transfer main part bottom is connected with the top of hot well, hot well one side is connected with the spray set of scraper blade evaporator system through the pipeline, the hot well opposite side passes through the pipeline and is connected with energy recuperation system, the top of evaporimeter heat transfer main part is passed through the pipeline in the evaporation condenser box top and is connected, the evaporation condenser box bottom is connected with energy recuperation system. Compared with a forced circulation crystallization evaporator, the falling film crystallization scraper evaporator can effectively save energy and has less occupied area.
Description
Technical Field
The utility model relates to an evaporimeter technical field, especially a novel falling liquid film scraper blade crystallization evaporimeter.
Background
Evaporator crystallization equipment in the market at present mainly adopts forced circulation evaporator crystallization, or falling film evaporation concentration + forced circulation evaporator crystallization, and the forced circulation evaporator is used for avoiding the product boiling on a heating surface from forming scale or generating crystallization. For this reason, the flow velocity in the pipe must be high and the flow rate large. The circulating liquid is heated as it flows through the heat exchanger and then partially vaporised as the pressure in the separator is reduced, thereby cooling the liquid to a temperature corresponding to the boiling point at that pressure. The operation of the evaporator is substantially independent of temperature differences due to the circulation pump. The recirculation rate of the material can be accurately adjusted. The evaporation rate was set within a certain range. In crystallization applications, crystals can be separated from a circulating crystal slurry by adjusting the circulation flow rate and using a special separator design. The equipment adopts forced circulation of a pump, has high evaporation rate and large concentration specific gravity, and is particularly suitable for evaporation of materials with higher concentration or viscosity. The current operating forced circulation evaporator mainly has the following problems that 1, the flow of the forced circulation pump is very large, the power of a motor is very large, and the energy consumption is high;
2. the forced circulation evaporator is used for solving the problems of scaling and crystallization, only scaling can be delayed in practical use, and the longer the running time is, the higher the energy consumption is, and the frequent cleaning is;
3. the forced circulation evaporator is only optimized in the falling film evaporator, the defect that the falling film evaporator cannot be crystallized is overcome, and the problems of high energy consumption, frequent cleaning, large equipment investment, large occupied area and the like exist in the actual operation;
4. the feed liquid of the forced circulation evaporator is in the heat exchange tube, the steam is outside the tube, and the tube is easily blocked in the crystallization process, so that the equipment is stopped;
5. the forced circulation evaporator has high requirements on feed liquid components, such as hardness removal, scale formation prevention and the like.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above disadvantages of the prior art, the present invention provides a novel falling film scraper crystallization evaporator to solve the above problems of the prior art.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a novel falling liquid film scraper blade crystallization evaporator, includes scraper blade evaporator system, hot well, crystallization piece-rate system and energy recuperation system, scraper blade evaporator system includes evaporator heat transfer main part, spray set, heat exchange tube, steam condenser box, steam compressor and snaking scraper, spray set adorns in the inside upside of evaporator heat transfer main part, the spray set below is located to the heat exchange tube, the steam condenser box is connected with the heat exchange tube, evaporator heat transfer main part bottom is connected with the top of hot well, hot well one side is connected with the spray set of scraper blade evaporator system through the pipeline, the hot well opposite side passes through the pipeline and is connected with energy recuperation system, the evaporation condenser box top is passed through the pipeline and is connected with the top of evaporator heat transfer main part, evaporation condenser box bottom is connected with energy recuperation system, be equipped with the crystallization piece-rate system on the pipeline that hot well and spray set are connected, the crystallization piece-rate system includes concentrate crystallization piece-rate ware and centrifuge, concentrate crystallization piece-rate ware bottom is equipped with salt leg separation export, salt leg separation export below is equipped with the thickener, concentrate crystal piece-rate ware in the concentrate crystal piece-rate ware.
As a further improvement of the utility model: the evaporator heat exchange main body is provided with a liquid inlet, one side of the liquid inlet is connected with a spraying device, and the other side of the liquid inlet is connected with a concentrated solution crystallization separator through a pipeline.
As a further improvement of the utility model: the steam condensing box is internally provided with a steam box and a condensing box, and a partition plate is arranged between the steam box and the condensing box for separation.
As a further improvement of the utility model: the steam condenser is characterized in that a steam box of the steam condenser is connected with the inlet end of the heat exchange tube, the top of the steam condenser is connected with the top of the evaporator heat exchange main body through a pipeline, and a steam compressor is arranged on the pipeline connected between the steam condenser and the evaporator heat exchange main body.
As a further improvement of the utility model: the steam condenser is characterized in that a condenser box of the steam condenser box is connected with the outlet end of the heat exchange tube, the bottom of the steam condenser box is connected with an energy recovery system through a pipeline, and a distilled water pump and a distilled water tank are mounted on the pipeline connected between the steam condenser box and the energy recovery system.
As a further improvement of the utility model: one side of the distilled water tank is connected with the steam condensing tank, the other side of the distilled water tank is connected with the distilled water pump, and the distilled water pump is connected with the energy recovery system.
As a further improvement of the utility model: the heat exchange tube is fixedly arranged on one side inside the heat exchange main body of the evaporator and is of a tubular structure, the inlet end of the heat exchange tube is arranged above the outlet end, the inlet end of the heat exchange tube is connected with the steam box, and the outlet end of the heat exchange tube is connected with the condensing box.
As a further improvement of the utility model: one side of the hot well is connected with a spraying device of the evaporator heat exchange main body through a pipeline, and a circulating pump is arranged on the pipeline connecting the hot well and the spraying device.
As a further improvement of the utility model: the spraying device comprises a spraying pipe and spraying heads, the spraying pipe is fixedly arranged inside or outside the evaporator heat exchange main body, the bottom of the spraying pipe is provided with a plurality of spraying heads, and the spraying heads are arranged to spray towards the lower heat exchange pipe.
As a further improvement of the utility model: the evaporator heat exchange main body is provided with a gas-liquid separator at the top, the gas-liquid separator comprises a spiral separation baffle and a wire mesh demister, and the gas-liquid separator is used for absorbing moisture in steam, ensuring a gas-liquid separation effect and protecting a steam compressor.
As a further improvement of the utility model: the condensing box is characterized in that an exhaust pipe is arranged on one side of the condensing box and used for discharging non-condensable gas in the condensing box, a condensed water outlet is formed in the condensing box and connected with an energy recovery system through a pipeline.
As a further improvement of the utility model: the evaporator heat exchange main body is provided with a steam inlet which is connected with an external steam generator and/or an external steam supply pipeline.
As a further improvement of the utility model: the evaporator heat exchange device is characterized in that a scale cleaning scraper is arranged in the evaporator heat exchange main body and connected with a scraper motor, the scraper motor is arranged on the evaporator heat exchange main body, and the scale cleaning scraper is used for cleaning scale crystals on the heat exchanger.
As a further improvement of the utility model: and a plurality of ports are arranged on two sides of the energy recovery system, wherein the two ports on the right side are respectively connected with the steam condensation box and the hot well through pipelines, and the two ports on the left side are respectively connected with a stock solution input pipeline and a distilled water output pipeline.
As a further improvement of the utility model: the evaporator heat exchange main body is provided with a plurality of sight glasses, and the sight glasses are used for monitoring the inside of the evaporator heat exchange main body.
As a further improvement of the utility model: a plurality of manholes are formed in one side of the evaporator heat exchange main body and used for overhauling the interior of the evaporator heat exchange main body.
Compared with the prior art, the beneficial effects of the utility model are that: the top sets up spray set in evaporimeter heat transfer main part, sprays the heat exchange tube of below, sprays uniformly on the heat exchange tube of whole evaporimeter heat transfer main part inside, from last down constantly flowing, forms the even liquid film of one deck at the outer wall of heat exchange tube, this falling liquid film crystallization evaporator simple structure, equipment area is little, stoste dwell time in the evaporimeter is long, and the contact surface is even, is favorable to abundant heat transfer, effectively reduces the energy consumption. The scraper evaporator system is provided with a concentrated solution crystallization separator for separating crystallized solids or solid matters in the concentrated solution, so that the spray header and the circulating pump are effectively prevented from being blocked, equipment is effectively protected, and the heat transfer efficiency is improved; the gas-liquid separator in the evaporator heat exchange main body effectively separates water in steam, so that the steam is cooled to obtain more pure distilled water, the steam compressor is protected, and the service life of the compressor is long. The scale cleaning scraper of the scraper evaporator system cleans the heat exchanger, and avoids scaling. Compared with the traditional forced circulation crystallization evaporator, the falling film crystallization evaporator can effectively save energy, has long service life, reduces the operation cost of enterprises and reduces the occupied space of equipment.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic structural diagram of a scraper evaporator system of the present invention.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings, in which: as shown in fig. 1 and 2, a novel falling film scraper crystallization evaporator comprises a scraper evaporator system, a hot well 5, a crystallization separation system and an energy recovery system 6, wherein the scraper evaporator system comprises an evaporator heat exchange main body 1, a spray device 2, a heat exchange tube 3, a steam condensation box 4, a steam compressor 43 and a scale removal scraper, the spray device 2 is arranged on the upper side inside the evaporator heat exchange main body 1, the heat exchange tube 3 is arranged below the spray device 2, the steam condensation box 4 is connected with the heat exchange tube 3, the bottom of the evaporator heat exchange main body 1 is connected with the top of the hot well 5, one side of the hot well 5 is connected with the spray device 2 of the scraper evaporator system through a pipeline, the other side of the hot well 5 is connected with the energy recovery system 6 through a pipeline, the top of the evaporation condensation box 4 is connected with the top of the evaporator heat exchange main body 1 through a pipeline, the bottom of the evaporation condensation box 4 is connected with the energy recovery system 6, a crystallization separation system is arranged on the pipeline connecting the hot well 5 with the spray device 2, the crystallization separation system comprises a concentrated liquid crystal separator 7 and a salt separator 72, a crystallization leg separator 73 is arranged below the thick salt separator 71, and a thick salt separator 71 is arranged below the thick salt separator 71.
The evaporator heat exchange main body 1 is provided with a liquid inlet 15, one side of the liquid inlet 15 is connected with the spraying device 2, and the other side of the liquid inlet is connected with the concentrated solution crystallization separator 7 through a pipeline.
Steam condensing box 4 is inside to be equipped with steam chest and condensing box, be equipped with the baffle between steam chest and the condensing box and separate.
The steam box of the steam condensing box 4 is connected with the inlet end of the heat exchange tube 3, the top of the steam condensing box 4 is connected with the top of the evaporator heat exchange main body 1 through a pipeline, and a steam compressor 43 is arranged on the pipeline connected between the steam condensing box 4 and the evaporator heat exchange main body 1.
The condensing box of the steam condensing box 4 is connected with the outlet end of the heat exchange tube 3, the bottom of the steam condensing box 4 is connected with the energy recovery system 6 through a pipeline, and a distilled water pump 44 and a distilled water tank 45 are arranged on the pipeline connected between the steam condensing box 4 and the energy recovery system 6.
One side of the distilled water tank 45 is connected with the steam condensation box 4, the other side of the distilled water tank 45 is connected with the distilled water pump 44, and the distilled water pump 44 is connected with the energy recovery system 6.
The heat exchange tube 3 is fixedly arranged on one side inside the evaporator heat exchange main body 1, the heat exchange tube 3 is of a tube array structure, the inlet end of the heat exchange tube 3 is arranged above the outlet end, the inlet end of the heat exchange tube 3 is connected with the steam box, and the outlet end of the heat exchange tube 3 is connected with the condensing box.
One side of the hot well 5 is connected with the spraying device 2 of the evaporator heat exchange main body 1 through a pipeline, and a circulating pump 51 is arranged on the pipeline connecting the hot well 5 and the spraying device 2.
The spraying device 2 comprises a spraying pipe 21 and spraying heads 22, the spraying pipe 21 is fixedly arranged inside the evaporator heat exchange main body 1, the bottom of the spraying pipe 21 is provided with a plurality of spraying heads 22, and the plurality of spraying heads 22 are arranged to spray towards the lower heat exchange pipe 3.
The top of the evaporator heat exchange main body 1 is provided with a gas-liquid separator 8, the gas-liquid separator 8 comprises a spiral separation baffle and a wire mesh demister, and the gas-liquid separator 8 is used for absorbing moisture in steam, ensuring a gas-liquid separation effect and protecting a steam compressor.
The condenser is characterized in that an exhaust pipe is arranged on one side of the condenser and used for exhausting non-condensable gas in the condenser, a condensed water outlet is formed in the condenser and is connected with an energy recovery system 6 through a pipeline.
The evaporator heat exchange body 1 is provided with a steam inlet 13, and the steam inlet 13 is connected with an external steam generator and/or an external steam supply pipe.
The evaporator heat exchange device is characterized in that a scale cleaning scraper is arranged in the evaporator heat exchange main body 1 and connected with a scraper motor 18, the scraper motor 18 is arranged on the evaporator heat exchange main body 1, and the scale cleaning scraper is used for cleaning scale crystals on the heat exchanger 3.
And a plurality of ports are arranged on two sides of the energy recovery system 6, wherein the two ports on the right side are respectively connected with the steam condensation box 4 and the hot well 5 through pipelines, and the two ports on the left side are respectively connected with a stock solution input pipeline 61 and a distilled water output pipeline 62.
The evaporator heat exchange main body 1 is provided with a plurality of sight glasses 11, and the sight glasses 11 are used for monitoring the inside of the evaporator heat exchange main body 1.
A plurality of manholes 12 are formed in one side of the evaporator heat exchange main body 1, and the manholes 12 are used for overhauling the inner portion 1 of the evaporator heat exchange main body.
The utility model discloses a theory of operation: the method comprises the steps of conveying a stock solution subjected to precipitation filtration and ammonia removal treatment to an energy recovery system 6, carrying out heat exchange on the stock solution and discharged distilled water in the energy recovery system 6, increasing the temperature of the stock solution, enabling the stock solution to enter a hot well 5, pumping the stock solution into a concentrate crystallization separator 7 in the hot well 5 by a circulating pump 51, enabling the stock solution to enter a scraper evaporator system after separation treatment, enabling the stock solution to firstly enter a spray pipe 21 of the scraper evaporator system, spraying the stock solution to the top of the evaporator heat exchange body 1 through a spray head 22, uniformly spraying the stock solution onto a heat exchange pipe 3 in the whole evaporator heat exchange body 1, enabling the stock solution to continuously flow from top to bottom, forming a layer of uniform liquid film on the outer wall of the heat exchange pipe 3, enabling water in the stock solution to be evaporated to form secondary steam due to high temperature of the heat exchange pipe 3, enabling the concentration of the stock solution to continuously rise to obtain a concentrate of the stock solution, enabling the concentrate to enter the hot well 5 from the lower portion of the evaporator heat exchange body 1, enabling the concentrate and a new stock solution to be mixed and circulated to a spraying device 2 of the scraper evaporator system, and continuously carrying out circulation treatment on the concentrate and the evaporation treatment.
When the stock solution is sprayed on the heat exchange tube 3, secondary steam is formed, the secondary steam and fresh steam produced by an external evaporator enter the evaporator heat exchange main body 1 through a pipeline, after the fresh steam passes through a gas-liquid separator 8 arranged above the evaporator heat exchange main body 1, liquid water carried by the steam is frothed to obtain high-purity steam, the high-purity steam is subjected to work doing in a steam compressor 43 by a high-speed rotating impeller driven by a motor, so that the temperature and the pressure are raised, the enthalpy of the steam is increased to a certain heat value, the steam is conveyed back to a scraper evaporator system through a pipeline and enters the heat exchange tube 3 from an evaporation box, the steam is subjected to heat transfer with the stock solution outside the heat exchange tube 3 in the heat exchange tube 3, the steam is condensed to produce desalted distilled water, a small amount of non-condensable gas is simultaneously produced, the distilled water flows into a condensation box through the heat exchange tube 3, a distilled water pump 44 operates to convey the distilled water in the scraper evaporator system in the condensation box into an energy recovery system 6 after passing through a distilled water tank 45, the distilled water is subjected to heat exchange with the stock solution entering the energy recovery system 6, the heat value is recovered, and finally the cooled distilled water is conveyed to a next process, and the exhaust pipe is filtered, and the small amount of the non-condensable gas is discharged through an exhaust pipe.
The utility model discloses a main function: the top sets up spray set in evaporimeter heat transfer main part, sprays the heat exchange tube of below, sprays uniformly on the heat exchange tube of whole evaporimeter heat transfer main part inside, from last down constantly flowing, forms the even liquid film of one deck at the outer wall of heat exchange tube, this falling liquid film crystallization evaporator simple structure, equipment area is little, stoste dwell time in the evaporimeter is long, and the contact surface is even, is favorable to abundant heat transfer, effectively reduces the energy consumption. The scraper evaporator system is provided with a concentrated solution crystallization separator for separating crystallized solids or solid garbage in the concentrated solution, so that the spray header and the circulating pump are effectively prevented from being blocked, the equipment is effectively protected, and the heat transfer efficiency is improved; the gas-liquid separator in the evaporator heat exchange main body effectively separates water in steam, so that the steam is cooled to obtain more pure distilled water, the steam compressor is protected, and the service life of the compressor is long. The scale cleaning scraper of the scraper evaporator system cleans the heat exchanger, and avoids scaling. Compared with the traditional evaporator, the falling film crystallization evaporator can effectively save energy, has long service life, reduces the operation cost of enterprises and reduces the occupied space of equipment.
In conclusion, after the ordinary skilled in the art reads the document of the present invention, according to the present invention, the technical solution and technical concept of the present invention do not need creative mental labor to make other various corresponding transformation schemes, which all belong to the protection scope of the present invention.
Claims (10)
1. The utility model provides a novel falling liquid film scraper blade crystallization evaporator, a serial communication port, including scraper blade evaporator system, hot well, crystallization piece-rate system and energy recuperation system, scraper blade evaporator system includes evaporator heat transfer main part, spray set, heat exchange tube, steam condenser box, steam compressor and snaking scraper, spray set installs in the inside upside of evaporator heat transfer main part, the spray set below is located to the heat exchange tube, the steam condenser box is connected with the heat exchange tube, evaporator heat transfer main part bottom is connected with the top of hot well, hot well one side is connected with the crystallization piece-rate device of scraper blade evaporator system through the pipeline, the hot well opposite side passes through the pipeline and is connected with energy recuperation system, the evaporator main part is arrived after passing through steam compressor exit linkage in evaporation condenser box top, evaporation condenser box bottom is connected with energy recuperation system, be equipped with the crystallization piece-rate system on the pipeline that hot well and spray set are connected, the crystallization piece-rate system includes concentrate crystallization piece-rate ware and centrifuge, concentrate piece-rate ware bottom is equipped with salt leg separation export, salt leg separation export below is equipped with the thickener.
2. The novel falling film scraper crystallization evaporator is characterized in that a steam box and a condensation box are arranged in the steam condensation box, and a partition plate is arranged between the steam box and the condensation box to divide the steam box and the condensation box into a plurality of loops.
3. The novel falling film scraper crystallization evaporator according to claim 2, wherein a steam box of the steam condenser box is connected with an inlet end of the heat exchange tube, the top of the steam condenser box is connected with the top of the evaporator heat exchange main body through a pipeline, and a steam compressor is mounted on the pipeline connected between the steam condenser box and the evaporator heat exchange main body.
4. The novel falling film scraper crystallization evaporator according to claim 3, wherein a condensing box of the steam condensing box is connected with the outlet end of the heat exchange tube, the bottom of the steam condensing box is connected with the energy recovery system through a pipeline, and a distilled water pump and a distilled water tank are installed on the pipeline connected between the steam condensing box and the energy recovery system.
5. The novel falling film scraper crystallization evaporator according to claim 4, wherein the heat exchange tube is fixedly arranged on one side inside the heat exchange main body of the evaporator, the heat exchange tube is of a tubular structure, the inlet end of the heat exchange tube is arranged at the outlet end of the compressor, the inlet end of the heat exchange tube is connected with the steam box, and the outlet end of the heat exchange tube is connected with the condensing box.
6. The novel falling film scraper crystallization evaporator according to claim 5, wherein one side of the hot well is connected with a spraying device of the evaporator heat exchange main body through a pipeline, and a circulating pump is installed on the pipeline connecting the hot well and the spraying device.
7. The novel falling film scraper blade crystallization evaporator of claim 1, wherein the spray device comprises a spray pipe and a spray header, the spray pipe is fixedly arranged inside the heat exchange main body of the evaporator, a plurality of spray headers are arranged at the bottom of the spray pipe, and a plurality of spray headers are arranged to spray towards the lower heat exchange pipe.
8. The novel falling film scraper crystallization evaporator is characterized in that a gas-liquid separator is arranged at the top of the heat exchange main body of the evaporator, and the gas-liquid separator comprises a spiral separation baffle plate and a wire mesh demister.
9. The novel falling film scraper crystallization evaporator according to claim 8, wherein a scale cleaning scraper is arranged in the evaporator heat exchange main body, the scale cleaning scraper is connected with a scraper motor, the scraper motor is arranged on the evaporator heat exchange main body, and the scale cleaning scraper is used for cleaning scale crystals on the heat exchanger.
10. The novel falling film scraper crystallization evaporator according to claim 9, wherein a plurality of ports are provided on both sides of the energy recovery system, wherein two ports on the right side are respectively connected with the steam condensation tank and the hot well through pipelines, and wherein two ports on the left side are respectively connected with the raw liquid input pipeline and the distilled water output pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221851819.5U CN217745759U (en) | 2022-07-19 | 2022-07-19 | Novel falling film scraper plate crystallization evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221851819.5U CN217745759U (en) | 2022-07-19 | 2022-07-19 | Novel falling film scraper plate crystallization evaporator |
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| Publication Number | Publication Date |
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| CN217745759U true CN217745759U (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221851819.5U Active CN217745759U (en) | 2022-07-19 | 2022-07-19 | Novel falling film scraper plate crystallization evaporator |
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| CN (1) | CN217745759U (en) |
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2022
- 2022-07-19 CN CN202221851819.5U patent/CN217745759U/en active Active
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