CN219072088U - Horizontal tube type evaporator with novel circulation system - Google Patents
Horizontal tube type evaporator with novel circulation system Download PDFInfo
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- CN219072088U CN219072088U CN202223328600.XU CN202223328600U CN219072088U CN 219072088 U CN219072088 U CN 219072088U CN 202223328600 U CN202223328600 U CN 202223328600U CN 219072088 U CN219072088 U CN 219072088U
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Abstract
The utility model provides a horizontal tube type evaporator with a novel circulation system, which comprises a horizontal tube type evaporator and a circulation system thereof, wherein the circulation system comprises a thermal well and a circulation pipeline which are arranged below a cylinder body of the horizontal tube type evaporator, one end of the circulation pipeline is connected with the thermal well through a circulation pump, the other end of the circulation pipeline is connected with a liquid distributor arranged at the upper part in the cylinder body, and the circulation system further comprises a descaling device. The utility model has simple structure, safety and reliability, and can obviously improve the heat exchange performance of the horizontal tube evaporator.
Description
Technical Field
The utility model relates to sewage treatment equipment, in particular to a horizontal tube type evaporator with a novel circulating system.
Background
The horizontal tube evaporator generally comprises a cylinder body, wherein heat media flows through the tube inside of a heat exchange tube bundle in the cylinder body, a circulation system distributes feed liquid on the outer tube wall of the heat exchange tube bundle, and the feed liquid is evaporated through heat exchange to be concentrated and reduced.
The circulation system operation mode of the traditional horizontal tube evaporator comprises the following steps: the circulating pump pressurizes the feed liquid in the hot well and sends out through the circulating pipe, a plurality of liquid distributors are installed on the upper portion of the cylinder of the horizontal pipe evaporator and communicated with the circulating pipe, the pressurized feed liquid is uniformly sprayed onto the horizontal heat exchange pipes of the horizontal pipe evaporator through the liquid distributors to form a liquid film through the circulating pipe, after the liquid film on the horizontal heat exchange pipes exchanges heat with high-temperature steam in the pipes, part of water in the feed liquid is evaporated to become steam, after the non-evaporated water and pollutants are concentrated, part of concentrated mother liquid is discharged through the concentrated liquid pump, the rest of concentrated mother liquid automatically flows into the hot well at the bottom of the horizontal pipe evaporator and is mixed with new feed liquid added into the hot well and then is pressurized and sent to the circulating pipe through the circulating pump, and the continuous repeated circulation is performed, and the feed liquid is continuously evaporated and concentrated in the horizontal pipe evaporator.
In the process of evaporating feed liquid by the horizontal tube evaporator, when the concentration multiple is higher, salt mud in the concentrated mother liquid is separated out, and then the salt mud is sprayed to the heat exchange tube by the liquid distributor, so that the heat exchange tube is seriously scaled, the heat transfer efficiency is influenced, and even the liquid distributor is blocked when the salt mud amount is large.
When the existing horizontal tube evaporator is used for treating materials easy to scale, part of the horizontal tube evaporator can be assembled with an online descaling system, and the online descaling system can remove scale substances on the surface of a heat exchange tube and collect the scale substances to the bottom of a hot well along with flushing of feed liquid; even if an on-line descaling system is not arranged, a part of scale on the surface of the heat exchange tube is naturally peeled off and is flushed and collected to the bottom of a hot well by the circularly operated feed liquid, wherein less than 5% of the scale can be discharged through a concentrate pump, and the rest of the scale is pumped to a liquid distributor by the circulating liquid pump and redistributed to the surface of the heat exchange tube.
Therefore, the feed liquid circulation mode of the existing horizontal tube evaporator has a great hidden trouble, and scale substances and crystalline salt mud generated in the evaporation process can not be effectively removed timely, so that the evaporation heat transfer efficiency of the system is seriously affected.
Disclosure of Invention
In view of the drawbacks and deficiencies of the prior art, an object of the present utility model is to provide a horizontal tube evaporator with a novel circulation system
The technical scheme of the utility model is as follows:
the utility model provides a horizontal tube type evaporator with novel circulation system, horizontal tube type evaporator includes circulation system, circulation system is including setting up in the hot well and the circulation pipeline of horizontal tube type evaporator barrel below, circulation pipeline one end links to each other with the hot well through the circulating pump, and the other end links to each other with the liquid distributor that upper portion set up in the barrel, its characterized in that: the circulating system also comprises a descaling device.
Preferably, the descaling device comprises a precipitation device, the precipitation device comprises one or a group of tank units, each tank unit at least comprises a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected with the circulating pipeline.
Preferably, the tank units are connected in series in sequence to the circulation pipeline.
Preferably, the tank units are connected to the circulation pipeline in parallel.
Preferably, the tank units are mixed in series and parallel and are connected to the circulation pipeline in a combined mode.
As a preferred scheme, the tank body unit comprises a tank body with a closed structure, wherein the upper part of the tank body is at least divided into two mutually isolated spaces, the upper end of one space is communicated with a liquid inlet of the tank body, the upper part of the other space is communicated with a liquid outlet of the tank body, the lower parts of the two spaces are communicated, the front section of the circulating pipeline sends mixed liquid into one space in the tank body through the liquid inlet for precipitation, and the supernatant after precipitation is sent into the liquid distributor through the rear section of the circulating pipeline through the liquid outlet of the other space.
As a preferable scheme, the tank body comprises an upper cylinder body and a lower cone matched with the upper cylinder body, and the bottom end of the lower cone is connected with a slurry pump through a pipeline.
As the preferable scheme, be provided with the inner tube in the upper portion barrel, the inner tube pipe wall is inner tube inner chamber and inner tube outer chamber with jar body upper portion space separation, and inner tube inner chamber central point puts and is provided with agitating unit, agitating unit is including the (mixing) shaft who link up jar body upper end cover, the (mixing) shaft is located jar internal axis body middle part or lower part and is provided with a set of stirring paddle, the (mixing) shaft stretches out jar external one end and is connected with a stirring motor output shaft.
Preferably, the inner tube and the upper cylinder have the same axis, and the length of the inner tube is smaller than the length of the upper cylinder.
As a preferable scheme, one or a group of scraping plates attached to the inner conical wall are arranged on the inner conical wall of the lower cone, and each scraping plate is connected with the inner end part of the stirring shaft through a connecting rod and is driven by the stirring shaft to scrape along the inner conical wall of the tank body in a rotating way.
The utility model has the technical effects that:
according to the utility model, the sedimentation device is arranged in the circulation pipeline of the circulation system, two different spaces separated from each other in the tank body are utilized, the feed liquid is stirred in one space and is self-settled, after sedimentation and separation are carried out in the other space, the supernatant layer is led out to the liquid distributor in the evaporator cylinder body from the rear section of the circulation pipeline to carry out membrane distribution and heat exchange evaporation, and the dirt mixed in the feed liquid is self-settled and accumulated in the lower cone of the tank body in the self-settlement process, and is discharged by the slurry pump through the bottom end pipeline of the lower cone.
The utility model also comprises a stirring device arranged in the inner cavity of the tank body, and the method of stirring the feed liquid is utilized to promote the sufficient precipitation and sedimentation of the scale or salt crystals mixed in the feed liquid, thereby further improving the scale removal and removal effects of the utility model.
The utility model also comprises a scraping plate arranged in the lower cone of the tank body, the scraping plate is driven by a motor and a shaft body to rotate along the inner wall of the lower cone, settled and adhered scale or salt crystals are scraped off, and finally discharged by a mud pump through a pipe at the bottom end of the lower cone.
In the sedimentation device, the stirring device and the scraping plate in the tank body can drive two different functional components by using the same stirring shaft, so that the transmission structure is simplified, and the production and installation cost is reduced.
In summary, on the basis of the circulation system of the existing horizontal tube evaporator, the utility model adopts the precipitation device for precipitating the dirt or crystals mixed in the mixed material liquid on the circulation pipeline, and achieves the purposes of precipitating and discharging the dirt or crystals by utilizing the regional stirring and vertical flow sedimentation in the tank body, thereby reducing the content of the dirt particles or crystal particles mixed in the mixed material liquid, correspondingly reducing the scale formation or crystallization degree of the material liquid on the surface of the heat exchange tube bundle after evaporation, and achieving the purpose of improving the heat exchange efficiency.
In general, the horizontal tube evaporator has the characteristics of good material liquid circulation effect, low scaling rate, high heat exchange efficiency, high water yield and the like.
Drawings
Fig. 1 is a schematic view showing the structure of a horizontal tube evaporator according to the present utility model.
Fig. 2 is a schematic structural view of the stirring device in the tank body of the utility model.
Fig. 3 is a schematic view showing the structure of the scraper in the tank body of the present utility model.
The reference numerals are listed below:
the device comprises a 21-liquid distributor, a 22-circulating pipeline, a 23-horizontal pipe evaporator cylinder, a 24-heat exchange tube bundle, a 25-precipitation tank, a 26-precipitation tank central tube, a 27-slurry pump, a 28-circulating liquid pump, a 29-hot well, a 30-concentrated liquid pump, a 31-stirring paddle and a 32-scraper.
Detailed Description
Reference now will be made in detail to embodiments of the application, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation, not limitation, of the present application. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Accordingly, it is intended that the present application cover such modifications and variations as come within the scope of the appended claims and their equivalents. As used in this specification, the terms "first," "second," and the like are used interchangeably to distinguish one component from another and are not intended to represent the location or importance of the respective components. As used in this specification, the terms "a," "an," "the," and "said" are intended to mean that there are one or more elements unless the context clearly indicates otherwise. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements other than the listed elements.
Referring now to the drawings, in which like numerals represent like elements throughout, the present utility model is further explained below in connection with specific embodiments.
Fig. 1 is a schematic view showing the structure of the horizontal tube evaporator of the present utility model.
As a preferred embodiment, the horizontal tube evaporator in this embodiment is a circulation mode and operation principle: the circulating liquid in the thermal well 29 enters the front section of the circulating pipeline 22 after being pressurized by the circulating liquid pump 28, enters the settling tank central tube 26 in the settling tank 25 through the liquid inlet, and the crystallized salt mud and the scale substances mixed in the circulating liquid in the settling tank central tube 26 and having larger density are settled to the bottom of the settling tank 25 and discharged through the mud pump 27 at the bottom of the settling tank 25.
In the space between the settling tank central tube 26 and the settling tank 25, the supernatant liquid of the settled circulating feed liquid reenters the rear section of the circulating pipeline 22 through a liquid outlet, and then is uniformly sprayed on the outer surface of the heat exchange tube bundle 24 through the liquid distributor 21 arranged on the upper part of the evaporator cylinder 23 to form a liquid film, and exchanges heat with high-temperature steam in the heat exchange tube bundle to evaporate, the circulating feed liquid is concentrated, a part of scale substances are generated in the concentration process and attached on the outer surface of the heat exchange tube bundle 24, and the rest part of the concentrated circulating feed liquid is flushed into the hot well 29.
If the heat exchanger tube bundle 24 is provided with an on-line mechanical or physical descaling device, the scale adhering to the outer surface of the heat exchanger tube bundle 24 will also be removed and washed into the hot well 29 by the evaporated and concentrated circulating feed liquid.
The scale substances and crystal particles generated by crystallization entering the thermal well 29 are mixed with the new material liquid and then sent to the precipitation tank 25 for precipitation through the circulating liquid pump 28, and the continuous circulation is performed.
The newly fed feed liquid may be mixed with the concentrated circulating feed liquid in the heat well 29, or alternatively, may be mixed with the circulating feed liquid in the precipitation tank 25.
The evaporated and partially concentrated feed liquid is discharged out of the system through a concentrate pump 30 together with a part of crystallized salt mud and scale substances, so that the evaporation and concentration dynamic balance of the evaporator system is realized.
In the utility model, the external discharge volumes of the concentrate pump 30 and the slurry pump 27 can be respectively adjusted, the external discharge volume of the concentrate can be coordinated and controlled, and the recovery rate can be adjusted.
As an example, the present utility model may be configured such that the concentrated liquid and the precipitated crystal salt slurry and scale are discharged only by the slurry pump 27 without providing the concentrated liquid pump 30.
As shown in fig. 2 and 3, in the present utility model, a stirring blade 31 or a scraper 32 may be provided in the precipitation tank 25, and the stirring blade 31 or the scraper 32 may be driven by a motor through a shaft.
The stirring blade 31 may be of a conventional stirring blade structure and is disposed at a lower position of the center tube 26 of the precipitation tank.
The scraper 32 is attached to the inner wall of the cone at the lower part of the settling tank 25, and the scraper 32 is connected with the inner end part of the shaft body through a connecting rod and driven by a motor through the shaft body to scrape the crystallized salt mud and scale substances settled on the inner wall along the inner wall of the cone.
As a preferred embodiment, one stirring shaft may be shared to drive both stirring blade 31 and scraper 32.
The stirring device and the scraping plate are particularly suitable for water quality conditions and evaporation conditions of certain salt mud and scale substances which are easy to harden during precipitation.
The test proves that: the same horizontal tube evaporator with the evaporation capacity of 15 tons per hour has the following advantages compared with the traditional feed liquid circulation mode by adopting the feed liquid circulation mode:
(1) The average water yield is more. The device is continuously operated for 7 days, the average evaporation per hour can reach 13 tons by adopting a new circulation mode, and the average evaporation per hour can reach only 10 tons by adopting a traditional circulation mode.
(2) The cleaning cycle is longer. The evaporation capacity is reduced to 9 tons as a cleaning limit, the cleaning period of the horizontal tube evaporator adopting a new circulation mode is 14 days, and the cleaning period of the horizontal tube evaporator adopting a traditional circulation mode is 7 days.
(3) The cleaning time is shorter. The cleaning of the horizontal tube evaporator adopting the new circulation mode only needs 20 hours, and the cleaning of the horizontal tube evaporator adopting the traditional circulation mode needs 30 hours.
The foregoing is merely a preferred embodiment of the present utility model, and other variations and modifications will be apparent to those skilled in the art in light of the present disclosure, which are intended to be included within the scope of the present utility model.
Claims (10)
1. The utility model provides a horizontal tube type evaporator with novel circulation system, horizontal tube type evaporator includes circulation system, circulation system including set up in hot well and the circulation pipeline of horizontal tube type evaporator barrel below, circulation pipeline one end links to each other with the hot well through the circulating pump, and the other end links to each other with the liquid distributor that upper portion set up in the barrel, its characterized in that: the circulating system also comprises a descaling device.
2. The horizontal tube evaporator as set forth in claim 1, wherein: the descaling device comprises a precipitation device, the precipitation device comprises one or a group of tank units, each tank unit at least comprises a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected with the circulating pipeline.
3. The horizontal tube evaporator as set forth in claim 2, wherein: the tank units are connected in series in sequence on the circulating pipeline.
4. The horizontal tube evaporator as set forth in claim 2, wherein: the tank units are connected in parallel to the circulation pipeline.
5. The horizontal tube evaporator as set forth in claim 2, wherein: the tank units are connected in series and parallel and are connected to the circulating pipeline in a mixed mode.
6. The horizontal tube evaporator as set forth in any one of claims 3-5, wherein: the tank body unit comprises a tank body with a closed structure, wherein the upper part of the tank body is at least divided into two spaces which are isolated from each other, the upper end of one space is communicated with a liquid inlet of the tank body, the upper part of the other space is communicated with a liquid outlet of the tank body, the lower parts of the two spaces are communicated, the front section of the circulating pipeline sends mixed liquid into one space in the tank body through the liquid inlet for precipitation, and the supernatant after precipitation is sent into the liquid distributor from the rear section of the circulating pipeline through the liquid outlet of the other space.
7. The horizontal tube evaporator as set forth in claim 6, wherein: the tank body comprises an upper cylinder body and a lower cone matched with the upper cylinder body, and the bottom end of the lower cone is connected with a slurry pump through a pipeline.
8. The horizontal tube evaporator as set forth in claim 7, wherein: an inner tube is arranged in the upper cylinder, the upper space of the tank body is divided into an inner tube inner cavity and an inner tube outer cavity by the wall of the inner tube, a stirring device is arranged in the center of the inner tube inner cavity, the stirring device comprises a stirring shaft penetrating through the upper end cover of the tank body, a group of stirring blades are arranged in the middle or lower portion of the shaft body, which is positioned in the tank body, of the stirring shaft, and one end, extending out of the tank body, of the stirring shaft is connected with an output shaft of a stirring motor.
9. The horizontal tube evaporator as set forth in claim 8, wherein: the inner tube has the same axis as the upper cylinder, and the length of the inner tube is smaller than the length of the upper cylinder.
10. The horizontal tube evaporator as set forth in claim 9, wherein: one or a group of scraping plates attached to the inner cone wall are arranged on the inner cone wall of the lower cone, and each scraping plate is connected with the inner end part of the stirring shaft through a connecting rod and is driven by the stirring shaft to scrape along the inner cone wall of the tank body in a rotating way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223328600.XU CN219072088U (en) | 2022-12-12 | 2022-12-12 | Horizontal tube type evaporator with novel circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223328600.XU CN219072088U (en) | 2022-12-12 | 2022-12-12 | Horizontal tube type evaporator with novel circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219072088U true CN219072088U (en) | 2023-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223328600.XU Active CN219072088U (en) | 2022-12-12 | 2022-12-12 | Horizontal tube type evaporator with novel circulation system |
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| Country | Link |
|---|---|
| CN (1) | CN219072088U (en) |
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- 2022-12-12 CN CN202223328600.XU patent/CN219072088U/en active Active
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