CN211836346U

CN211836346U - Distributor and evaporator with same

Info

Publication number: CN211836346U
Application number: CN202020273639.8U
Authority: CN
Inventors: 张伟明; 周海平; 汪哲
Original assignee: Shanghai Shengjian Environmental System Technology Co ltd
Current assignee: Shanghai Shengjian Environmental System Technology Co ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-11-03
Anticipated expiration: 2030-03-06

Abstract

The utility model provides a distributor and have evaporimeter of this distributor. The distributor comprises a distributor body with a feeding cavity, a feeding hole communicated with the feeding cavity is formed in the distributor body, a plurality of uniformly distributed material sprinkling holes are formed in the distributor body, and all the material sprinkling holes are communicated with the feeding cavity; and the feed inlet and the material spraying hole are respectively positioned on two connected surfaces. The evaporator comprises an evaporator shell with a gas phase outlet and a material outlet, and the distributor is arranged in the evaporator shell. When the maintenance was maintained at the evaporimeter, and under the circumstances that the distributor did not rotate, the material got into the distributor by the feed inlet, and the rethread is sprinkled on the internal face of evaporimeter casing through whole material holes that spill, owing to all spill material hole evenly distributed, guarantee that the material can be sprinkled on the internal face of evaporimeter casing uniformly to the realization still can spill the material uniformly on the internal face of evaporimeter casing under the circumstances that the distributor did not rotate, practiced thrift the energy consumption.

Description

Distributor and evaporator with same

Technical Field

The utility model relates to an evaporimeter technical field especially relates to a distributor and have evaporimeter of this distributor.

Background

The wiped film evaporator is characterized in that a liquid film is forcibly formed on the inner wall of the evaporator through rotating the wiped film evaporator, the liquid film flows along the inner wall of the evaporator at a high speed, so that the heat transfer efficiency is high, and the wiped film evaporator can perform falling film evaporation under a vacuum condition. As shown in fig. 1, material enters the evaporator from a material inlet located above the heating zone; the material is evenly sprinkled on the heating wall surface of the evaporator under the action of the rotary centrifugal force of the distributor 5, then, the material is gasified to the next unit through a gas phase outlet in the descending process and under the action of steam heating, and the high boiling point material is discharged through a bottom material outlet.

As shown in fig. 2, the conventional distributor 5 is designed in a planar structure, the surface of the distributor 5 is provided with a plurality of guiding chutes 51, and the material needs to be uniformly distributed on the inner wall of the wiped film evaporator through the guiding chutes 51 when the distributor 5 rotates. When maintaining maintenance equipment, on guaranteeing that the material can be by evenly distributed to the inner wall of evaporimeter, still need actuating mechanism to continue to start in order to drive the rotation of distributing device 5, not only can cause the energy consumption this moment higher, and will cause the influence to the normal maintenance of equipment.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, the present invention provides a distributor that can distribute material evenly on the evaporation surface of an evaporator even when not rotating.

In order to achieve the above object, an embodiment of the present invention provides a distributor for an evaporator, the distributor including a distributor body with a feeding cavity, the distributor body being provided with a feeding port communicated with the feeding cavity, the distributor body being provided with a plurality of uniformly distributed sprinkling holes, all of which are communicated with the feeding cavity; and the feed inlet and the material spraying hole are respectively positioned on two connected surfaces. When the distributor is maintained and maintained, materials enter the feeding cavity of the distributor from the feeding hole under the condition that the distributor does not rotate, and then are sprinkled on the evaporation surface of the evaporator through all the sprinkling holes communicated with the feeding cavity.

Furthermore, the distributor body is cylindrical, a plurality of material distribution parts are axially arranged on the side face of the distributor body, and each material distribution part is internally provided with a circle of uniformly distributed material sprinkling holes. The distributor body adopts the structural design of tube-shape, is convenient for set up evenly distributed's spilling material hole on the side of distributor body, and then guarantees that the material can be evenly spilt on the evaporation surface of evaporimeter through whole spilling material holes. And the structural design of a plurality of material distributing parts ensures that the materials are more uniformly sprinkled on the evaporation surface of the evaporator shell after passing through all the sprinkling holes.

Furthermore, the feed inlet is located at the center of one end face of the distributor body, so that distances between all the material spraying holes and the feed inlet are equal, the material is guaranteed to flow to all the material spraying holes at the same time after passing through the feed inlet, and then the material is uniformly sprayed on the evaporation surface of the evaporator through all the material spraying holes.

The technical scheme has the following technical effects:

when the distributor is maintained and maintained, materials enter the feeding cavity of the distributor from the feeding hole under the condition that the distributor does not rotate, and then are sprinkled on the evaporation surface of the evaporator through all the sprinkling holes communicated with the feeding cavity.

Another object of the present invention is to provide an evaporator that can uniformly distribute a material on an inner wall of an evaporator case when the evaporator is not rotated.

In order to achieve the above object, an embodiment of the present invention provides an evaporator, which includes an evaporator casing with a gas outlet and a material outlet, wherein the evaporator casing is provided with a distributor. When this evaporimeter is maintained, and under the circumstances that the distributor does not rotate, the material gets into the feeding chamber of distributor by the feed inlet, the rethread is spilt on the internal face of evaporimeter casing with the communicating whole hole of spilling in feeding chamber, on the evaporation face of evaporimeter promptly, because whole hole evenly distributed of spilling, guarantee the material after whole hole of spilling, can be spilt on the internal face of evaporimeter casing uniformly, thereby realize under the circumstances that the distributor does not rotate, still can spill the material uniformly on the internal face of evaporimeter casing, the energy consumption has been practiced thrift, the maintenance work of this evaporimeter has been made things convenient for.

Further, the evaporator also comprises a film scraper, the film scraper comprises a rotary driving mechanism and a scraper connected with the rotary driving mechanism, the scraper is positioned in the heating evaporation area, and the distributor is connected with the rotary driving mechanism. When the evaporator shell normally works, the rotary driving mechanism drives the scraper to rotate, and drives the distributor to rotate together, so that materials can be uniformly sprayed on the inner wall surface of the evaporator shell through the rotary distributor. And the rotary scraper can scrape the materials scattered on the inner wall surface of the evaporator shell into a liquid film so as to increase the contact area of the materials and the inner wall surface of the evaporator shell and improve the evaporation efficiency.

Further, a tool rest for supporting the scraper is mounted on the rotary driving mechanism. The rotary driving mechanism drives the scraper to rotate by driving the cutter frame.

Further, the scraper is parallel to a generatrix of an inner wall surface of the evaporator case. So as to ensure that the scraper can scrape the material into a liquid film with uniform thickness on the inner wall surface of the evaporator shell when rotating.

Further, a gas phase outlet on the evaporator shell is positioned above the distributor, and a material outlet of the evaporator shell is arranged at the bottom of the heating evaporation area. Therefore, after the light components in the material are evaporated to form steam flow and rise, the steam flow smoothly and quickly flows out from the gas phase outlet positioned above the distributor, and the heavy components in the material are smoothly discharged from the material outlet positioned at the bottom of the heating evaporation area. And the gas phase outlet is positioned above the distributor, so that the heavy components in the material can be prevented from flowing out through the gas phase outlet in the downward flowing process under the action of gravity, and the light component substances in the material can be ensured to flow out through the gas phase outlet. Further, the lower cavity of the evaporator shell is a conical cavity, and the material outlet is located at the small opening end of the conical cavity. Therefore, heavy components in the materials on the evaporator shell are collected at the small end of the conical cavity under the action of gravity and the guiding action of the conical cavity and are discharged through the material outlet.

Furthermore, a heating jacket is installed on the evaporator shell, a steam supply port is formed in the upper end of the heating jacket, and a steam return port is formed in the lower end of the heating jacket. Heating steam flows into the heating jacket from the steam supply port located at the upper end, flows out from the steam backflow port located at the lower end, and the heat of the heating steam is transmitted to the evaporator shell through the heating jacket so as to realize the heating of the evaporator shell and accelerate the evaporation of materials located on the inner wall of the evaporator shell, thereby improving the working efficiency of the evaporator. And the heating steam gets into the heating jacket by the upper end, and the mode of the lower extreme outflow of heating jacket again can guarantee that the temperature of the upper end of heating jacket is higher to guarantee that the material is sprinkled on the inner wall of evaporimeter casing after and just can evaporate fast under the long distance condition of not flowing downwards, further improved the work efficiency of this evaporimeter.

Drawings

Fig. 1 is a schematic structural diagram of a wiped film evaporator in the prior art.

Fig. 2 is a schematic structural diagram of a distributor in the prior art.

Fig. 3 is a schematic structural diagram of a distributor according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an evaporator according to an embodiment of the present invention.

Description of the element reference numerals

1 distributor body 312 spindle

11 feed inlet 32 scraper

12 sprinkling hole 33 knife rest

2 evaporator shell 4 heating jacket

21 gas phase outlet 41 steam supply port

22 material outlet 42 steam return port

23 material inlet 5 distributing device

3 guiding groove of film scraper 51

31 rotating driving mechanism 6 transmission shaft

311 Motor

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present application are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, change of the ratio relationship or adjustment of the sizes should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are only for convenience of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the modifications can be changed or adjusted without substantial technical changes and modifications.

As shown in fig. 3, the present embodiment provides a distributor for an evaporator, the distributor includes a distributor body 1 with a feeding cavity, the distributor body 1 is provided with a feeding port 11 communicated with the feeding cavity, the distributor body 1 is provided with a plurality of uniformly distributed material scattering holes 12, and all the material scattering holes 12 are communicated with the feeding cavity; and the feed inlet 11 and the sprinkling holes 12 are respectively positioned on two connected surfaces. When the distributor is maintained and maintained, materials enter the feeding cavity of the distributor through the feeding hole 11 under the condition that the distributor does not rotate, and then are sprinkled on the evaporation surface of the evaporator through all the sprinkling holes 12 communicated with the feeding cavity, and the materials can be evenly sprinkled on the evaporation surface of the evaporator after passing through all the sprinkling holes 12 due to the fact that all the sprinkling holes 12 are evenly distributed, so that the materials can be still evenly sprinkled on the evaporation surface of the evaporator under the condition that the distributor does not rotate, and energy consumption is saved.

As shown in fig. 3, the distributor body 1 in this embodiment is cylindrical, a plurality of distribution portions are axially disposed on a side surface of the distributor body 1, and each distribution portion is provided with a circle of uniformly distributed sprinkling holes 12. The distributor body 1 adopts the tubular structural design, is convenient for set up evenly distributed's spilling material hole 12 on the side of distributor body 1, and then guarantees that the material can be evenly spilt on the evaporation surface of evaporimeter through whole spilling material hole 12. And the structural design of a plurality of material distributing parts ensures that the materials are more uniformly sprinkled on the evaporation surface of the evaporator shell 2 after passing through all the sprinkling holes 12.

As shown in fig. 3, in this embodiment, the feeding hole 11 is located at the center of an end surface of the distributor body 1, so that distances between all the material spraying holes 12 and the feeding hole 11 are equal, and it is ensured that the material flows to all the material spraying holes 12 through the feeding hole 11 at the same time, and then is uniformly sprayed on the evaporation surface of the evaporator through all the material spraying holes 12.

Meanwhile, as shown in fig. 4, the present embodiment provides an evaporator comprising an evaporator case 2 having a vapor outlet 21 and a material outlet 22, and a distributor provided in the evaporator case 2. When this evaporimeter is maintained, and under the circumstances that the distributor does not rotate, the material gets into the feeding chamber of distributor by feed inlet 11, the rethread is sprinkled on the internal face of evaporimeter casing 2 with the communicating whole hole 12 that sprinkles in feeding chamber, on the evaporating surface of evaporimeter promptly, because whole hole 12 evenly distributed sprinkles, guarantee the material through whole hole 12 back that sprinkles, will be sprinkled on the internal face of evaporimeter casing 2 evenly, thereby realize under the circumstances that the distributor does not rotate, still can spill the material evenly on the internal face of evaporimeter casing 2, the energy consumption has been practiced thrift, the maintenance work of this evaporimeter has been made things convenient for.

The space in the evaporator shell 2 below the distributor is a heating evaporation area. As shown in fig. 4, the evaporator in this embodiment further includes a film scraper 3, the film scraper 3 includes a rotary driving mechanism 31 and a scraper 32 connected to the rotary driving mechanism 31, the scraper 32 is located in the heating evaporation area, and the distributor is connected to the rotary driving mechanism 31. In normal operation, the rotating driving mechanism 31 drives the distributor to rotate together when driving the scraper 32 to rotate, so as to ensure that the material can be more uniformly sprinkled on the inner wall surface of the evaporator shell 2 through the rotating distributor. And the rotating scraper 32 can scrape the material sprinkled on the inner wall surface of the evaporator shell 2 into a liquid film, so that the contact area of the material and the inner wall surface of the evaporator shell 2 is increased, and the evaporation efficiency is improved. As shown in fig. 4, the rotary drive mechanism 31 in this embodiment is provided with a blade holder 33 that supports the doctor blade 32. The rotary drive mechanism 31 rotates the doctor blade 32 by driving the blade holder 33. In addition, as shown in fig. 4, the scraper 32 in the present embodiment is parallel to the generatrix of the inner wall surface of the evaporator case 2. So as to ensure that the scraper 32 can scrape the material into a liquid film with uniform thickness on the inner wall surface of the evaporator shell 2 when rotating.

As shown in fig. 4, the rotary drive mechanism 31 in the present embodiment includes a motor 311 and a spindle 312 connected to the motor 311. The doctor blade 32 is in this embodiment mounted on a spindle 312 by a blade holder 33 and the distributor is also mounted on the spindle 312. When the evaporator works normally, the motor 311 drives the main shaft 312 to rotate, and the main shaft 312 drives the distributor to rotate together, so that the material entering the distributor is uniformly sprinkled on the inner wall surface of the evaporator shell 2 through all the sprinkling holes 12 under the action of centrifugal force. And when the main shaft 312 rotates, the scraper 32 is driven to rotate together, so that the material sprinkled on the evaporator shell 2 is scraped into a liquid film with uniform thickness, the contact area between the material and the evaporator shell 2 is increased, and the evaporation of light components in the material is accelerated. The evaporator in this embodiment is also referred to as a wiped film evaporator.

As shown in fig. 4, in this embodiment, the gas phase outlet 21 of the evaporator housing 2 is located above the distributor, and the material outlet 22 of the evaporator housing 2 is located at the bottom of the heating and evaporating zone. Thus, the light components in the material are evaporated to form steam flow which rises and flows out smoothly and quickly through the gas phase outlet 21 positioned above the distributor, and the heavy components in the material are discharged smoothly through the material outlet 22 positioned at the bottom of the heating and evaporating area. And the gas phase outlet 21 is positioned above the distributor, so that the heavy components in the material can be prevented from flowing out through the gas phase outlet 21 in the downward flowing process under the action of gravity, and the light component substances in the material can be ensured to flow out through the gas phase outlet 21.

As shown in fig. 4, the lower cavity of the evaporator housing 2 in this embodiment is a conical cavity, and the material outlet 22 is located at the small end of the conical cavity. In this way, heavy components in the material located on the evaporator housing 2 will collect at the small end of the conical chamber under the action of gravity and under the guiding action of the conical chamber and will be discharged through the material outlet 22.

As shown in fig. 4, in the present embodiment, the heating jacket 4 is mounted on the evaporator case 2, the upper end of the heating jacket 4 is provided with a steam supply port 41, and the lower end of the heating jacket 4 is provided with a steam return port 42. The heating steam flows into the heating jacket 4 from the steam supply port 41 at the upper end and flows out from the steam return port 42 at the lower end, and the heat of the heating steam is transferred to the evaporator shell 2 through the heating jacket 4 to realize the heating of the evaporator shell 2, accelerate the evaporation of the material on the inner wall of the evaporator shell 2 and improve the working efficiency of the evaporator. And the heating steam enters the heating jacket 4 from the upper end and flows out from the lower end of the heating jacket 4, so that the temperature of the upper end of the heating jacket 4 can be ensured to be higher, the materials are ensured to be sprinkled on the inner wall of the evaporator shell 2 and to be quickly evaporated without flowing downwards for a long distance, and the working efficiency of the evaporator is further improved.

The distributor in this embodiment is also referred to as a distributor, in particular also a trough distributor. The upper end of the evaporator shell 2 is also provided with a material inlet 23, and the material enters the distributor through the material inlet 23 and the feed inlet 11.

As shown in fig. 4, in the normal operation of the wiped film evaporator of the present embodiment, the process steps are as follows:

1. the material enters the wiped film evaporator through the material inlet 23 and reaches the rotating distributor, and then enters the distributor through the feed inlet 11, and the material is uniformly sprayed on the inner wall of the evaporator shell 2 through the material spraying holes 12 under the action of centrifugal force;

2. during the lowering of the material, and under the action of steam heating, the low boiling point material is gasified and flows to the next unit through the gas phase outlet 21, and the high boiling point material is discharged through the material outlet 22 at the bottom of the evaporator shell 2.

The distributor in this embodiment is installed on the main shaft 312, and during maintenance, even if the main shaft 312 does not rotate, the material can be uniformly distributed on the inner wall of the evaporator shell 2 through the distributor; in normal operation, the spindle 312 rotates, and the material is distributed more evenly on the inner wall of the evaporator housing 2 by the distributor under the action of centrifugal force. As shown in fig. 4, the gap between the distributor body 1 and the inner wall surface of the evaporator shell 2 should not be too large, the specific gap is set according to actual requirements, and the flow rate of the material entering the distributor through the material inlet 23 cannot be too low, and the specific flow rate is set according to actual requirements, so as to ensure that the material has a certain radial flow rate after flowing out through the material scattering holes 12 and can be scattered on the inner wall surface of the evaporator shell 2 when the main shaft 312 is not rotated, thereby avoiding the material flowing out through the material scattering holes 12 from falling down due to the gravity acting on the inner wall surface of the evaporator shell 2. In this embodiment, the height of the scraper 32 is higher than that of the distributor, and this position ensures that the scraper 32 can fully contact with the material distributed on the evaporator shell 2 through the distributor when rotating, so as to scrape the material completely sprinkled on the evaporator shell 2 into a liquid film, thereby improving the evaporation efficiency. In addition, in the process that the material flows out from the material sprinkling holes 12 along the radial direction and flows towards the inner wall surface of the evaporator shell 2, the scraper 32 does not substantially influence the normal flow and distribution of the material because the thickness of the scraper 32 is thinner.

In this embodiment, the evaporator shell 2 and the heating jacket 4 correspond to each other in a heating evaporation area. The material radially gets into the evaporimeter from the top of heating evaporation zone, and then distributes on the heating wall of evaporimeter through the slot type distributor, and this heating wall is located the inner wall of evaporimeter casing 2, and then, rotatory wiped film ware 3 will be located the material on the heating wall and continuously evenly scrape into the even liquid film of thickness, and impel downwards with the heliciform. In the process, the rotating film scraper 3 can ensure that a continuous and uniform liquid film generates high-speed turbulence and prevent the liquid film from coking and scaling on the heating wall surface, thereby improving the heat transfer coefficient; the light components in the liquid film are evaporated to form steam flow which rises and reaches an external condenser directly connected with the evaporator through a steam-liquid separator, and the heavy components in the liquid film are discharged from a cone at the bottom of the evaporator.

This embodiment changes traditional plane distributor into slot type distributor through the structure that changes the distributor, can reach when the irrotational, but material evenly distributed is on the internal face of evaporimeter casing 2. Thus, during maintenance, the motor 311 of the wiped film evaporator does not need to be started, and materials can be uniformly distributed on the inner wall surface of the evaporator shell 2 based on the structural design of the distributor, so that the energy-saving effect is achieved. The conventional plane type material distributor 5 cannot achieve the effect of uniform material distribution when the transmission shaft 6 does not rotate, as shown in fig. 1. In addition, the manufacturing cost of the distributor in the embodiment is not different from that of the traditional distributor.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A distributor is used for an evaporator and is characterized by comprising a distributor body (1) with a feeding cavity, wherein a feeding hole (11) communicated with the feeding cavity is formed in the distributor body (1), a plurality of uniformly distributed material sprinkling holes (12) are formed in the distributor body (1), and all the material sprinkling holes (12) are communicated with the feeding cavity; and the feed inlet (11) and the material spraying hole (12) are respectively positioned on two connected surfaces.

2. The distributor according to claim 1, wherein the distributor body (1) is cylindrical, a plurality of distributing parts are axially arranged on the side surface of the distributor body (1), and each distributing part is provided with a circle of uniformly distributed sprinkling holes (12).

3. A distributor according to claim 1, wherein the feed opening (11) is located in the centre of an end face of the distributor body (1).

4. An evaporator comprising an evaporator housing (2) with a gas outlet (21) and a material outlet (22), characterized in that a distributor according to any of claims 1 to 3 is provided in the evaporator housing (2).

5. The evaporator according to claim 4, further comprising a film scraper (3), wherein the film scraper (3) comprises a rotary driving mechanism (31) and a scraper (32) connected with the rotary driving mechanism (31), the scraper (32) is positioned in the heating evaporation area, and the distributor is connected with the rotary driving mechanism (31).

6. An evaporator according to claim 5 wherein the rotary drive mechanism (31) is provided with a blade holder (33) supporting the scraper blade (32).

7. The evaporator according to claim 5, wherein the scraper (32) is parallel to a generatrix of an inner wall surface of the evaporator case (2).

8. An evaporator according to claim 4 characterised in that the gas phase outlet (21) of the evaporator housing (2) is located above the distributor and the material outlet (22) of the evaporator housing (2) is located at the bottom of the heating and evaporation zone.

9. An evaporator according to claim 4 wherein the lower cavity of the evaporator shell (2) is a conical cavity and the material outlet (22) is located at the small mouth end of the conical cavity.

10. The evaporator according to claim 4, wherein a heating jacket (4) is mounted on the evaporator shell (2), a steam supply port (41) is arranged at the upper end of the heating jacket (4), and a steam return port (42) is arranged at the lower end of the heating jacket (4).