CN212974204U

CN212974204U - Multiple-effect integrated falling film evaporation system

Info

Publication number: CN212974204U
Application number: CN202021248781.3U
Authority: CN
Inventors: 荣东
Original assignee: Guangdong Wenyang Environmental Technology Co ltd
Current assignee: Guangdong Wenyang Environmental Technology Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-04-16
Anticipated expiration: 2030-06-30

Abstract

The utility model relates to an integrative falling liquid film evaporation system of multiple effect, include: the device comprises a shell, a first evaporator and a second evaporator, wherein a partition plate is arranged inside the shell and divides the interior of the shell into at least two evaporation cavities; the shell is provided with at least two secondary steam outlets which are respectively communicated with the evaporation cavity; at least two groups of heat exchange tube bundles are respectively arranged in the evaporation cavity; at least two front tube boxes which are respectively connected with one end of the heat exchange tube bundle; the steam outlet of the former evaporation cavity is connected with the steam inlet of the front tube box on the adjacent evaporation cavity after the former evaporation cavity. The inside of the shell is divided into at least two evaporation cavities by the partition plate, secondary steam in the previous evaporation cavity flows into the next adjacent front pipe box through a secondary steam outlet, a pipeline and a steam inlet on the next adjacent front pipe box which are communicated with the evaporation cavities, and then flows into the heat exchange pipe bundle in the next adjacent evaporation cavity, the whole multi-effect film evaporation system is integrated, the structure is more compact, and the space occupation and the consumption of saving pipes are reduced.

Description

Multiple-effect integrated falling film evaporation system

Technical Field

The utility model relates to an evaporimeter technical field, in particular to integrative falling liquid film evaporation system of multiple-effect.

Background

At present, in the manufacturing process of products in the industries of chemical industry, pharmacy, papermaking, salt manufacturing and the like, the technological processes of steam concentration, evaporative crystallization, low-temperature evaporation and the like are required. The concentration, crystallization and the like of the solution mostly adopt a falling film evaporator or a climbing film evaporator, the falling film evaporator is widely applied to the evaporation and concentration of water phase or organic phase solution, and is particularly suitable for the evaporation and concentration of waste water and traditional Chinese medicines under the condition of normal pressure or vacuum.

The multi-effect evaporation process is designed by utilizing the principle that the boiling temperatures of water are different at different pressures, in a multi-effect evaporation falling film system, heating steam enters a first effect of an evaporation system, secondary steam generated by the first effect enters a second effect and serves as heating steam of the second effect, and by analogy, the secondary steam of the last effect is introduced into a condenser, and the effect of saving energy is achieved by utilizing the steam for multiple times. However, the traditional multiple-effect evaporation falling film system has a combined structure, occupies a large space and consumes more pipes.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a multiple-effect integrated falling film evaporation system for solving the problems of the conventional technology.

A multiple effect integrated falling film evaporation system comprising:

the evaporator comprises a shell, wherein a partition plate is arranged inside the shell and divides the inside of the shell into at least two evaporation cavities; the shell is provided with at least two secondary steam outlets which are respectively communicated with the evaporation cavity;

at least two groups of heat exchange tube bundles are respectively arranged in the evaporation cavity;

at least two front tube boxes which are respectively connected with one end of the heat exchange tube bundle; the front pipe box is provided with a steam inlet; the steam outlet of the former evaporation cavity is connected with the steam inlet of the front tube box on the adjacent evaporation cavity behind through a pipeline.

Above-mentioned integrative falling liquid film evaporation system of multiple-effect, through setting up the baffle in the inside of casing, the baffle divides into two at least evaporation chamber with the inside of casing, the last secondary steam export of previous evaporation chamber passes through the pipeline and links to each other with the steam inlet of the last preceding pipe case of the last adjacent evaporation chamber in back to the secondary steam of previous evaporation intracavity flows to the adjacent preceding pipe case in back through the secondary steam export of this evaporation chamber of intercommunication, the pipeline and the steam inlet on the adjacent preceding pipe case in back, then flows to in the heat exchanger tube bank in the adjacent evaporation chamber in back. The whole multi-effect membrane evaporation system is integrated, the structure is more compact, and the space occupation is reduced, and the consumption of pipes is saved.

In one embodiment, the shell comprises an evaporation tank and at least two steam collecting boxes, the partition plate is arranged inside the evaporation tank to divide the inside of the evaporation tank into at least two evaporation cavities, the steam collecting boxes are arranged on the top of the evaporation tank and are respectively communicated with the evaporation cavities, and the secondary steam outlets are respectively arranged on the steam collecting boxes.

In one embodiment, a demister is arranged in the steam collecting box and is arranged between the evaporation cavity and the secondary steam outlet.

In one embodiment, the top of the front pipe box is provided with a non-condensable gas outlet, and the bottom of the front pipe box is provided with a first distilled water outlet.

In one embodiment, the evaporator further comprises at least two rear tube boxes, the rear tube boxes are arranged in the evaporation cavity and are respectively connected with one ends, far away from the front tube box, of the heat exchange tube bundles, and a second distilled water outlet is arranged at the bottom of each rear tube box and is located outside the shell.

In one embodiment, the shell is further provided with at least two maintenance ports, and the maintenance ports are respectively communicated with the evaporation cavity.

In one embodiment, the system further comprises at least two solution sprayers, the solution sprayers are respectively arranged in the evaporation cavity and correspond to the heat exchange tube bundle, and a solution spraying inlet and a plurality of solution spraying outlets are formed in each solution sprayer.

In one embodiment, the bottom of the shell is provided with at least two feed liquid outlets which are respectively communicated with the evaporation cavity; the multi-effect integrated falling film evaporation system further comprises at least two hot wells and at least two circulating pumps, inlets of the hot wells are respectively connected with the feed liquid outlets, outlets of the hot wells are respectively connected with inlets of the circulating pumps through pipelines, and outlets of the circulating pumps are respectively connected with the solution spraying inlets through pipelines.

In one embodiment, the bottom of the hot well is also provided with a hand hole.

In one embodiment, a filter screen is further arranged in the hot well.

Drawings

Fig. 1 is a schematic structural diagram of a multiple-effect integrated falling film evaporation system according to an embodiment of the present invention;

FIG. 2 is a top view of the multi-effect integral falling film evaporation system of FIG. 1;

figure 3 is a partial side view of the multiple effect integral falling film evaporation system shown in figure 1.

The meaning of the reference symbols in the drawings is:

the device comprises a shell 10, a partition plate 11, an evaporation cavity 12, a secondary steam outlet 13, a maintenance port 14, an evaporation tank 15, a steam collecting box 16, a demister 17, a heat exchange tube bundle 20, a front tube box 30, a steam inlet 31, a non-condensable gas outlet 32, a first distilled water outlet 33, a rear tube box 40, a second distilled water outlet 41, a solution sprayer 50, a solution spraying inlet 51, a nozzle 60, a hot well 70, a hand hole 71, a stock solution inlet 72, a filter screen 73 and a circulating pump 80.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3, a multi-effect integrated falling film evaporation system according to an embodiment of the present invention,

referring to fig. 1, the multiple-effect integrated falling film evaporation system includes a shell 10, at least two heat exchange tube bundles 20 and at least two front tube boxes 30. The interior of the housing 10 is provided with a partition 11, which partition 11 divides the interior of the housing 10 into at least two evaporation chambers 12. At least two secondary steam outlets 13 are arranged on the top of the shell 10, and specifically, the secondary steam outlets 13 are respectively communicated with the evaporation cavity 12. The heat exchange tube bundles 20 are respectively arranged in the evaporation chambers 12. The front header 30 is disposed outside the shell 10, the front header 30 is respectively connected to one ends of the heat exchange tube bundles 20, and a steam inlet 31 is disposed at a side portion of the front header 30. The secondary steam outlet 13 of the previous evaporating chamber 12 is connected with the steam inlet 31 of the front header 30 of the next adjacent evaporating chamber 12 by a pipeline.

In the multiple-effect integrated falling film evaporation system, the partition plate 11 is arranged in the shell 10, the partition plate 11 divides the interior of the shell 10 into at least two evaporation cavities 12, the secondary steam outlet 13 on the previous evaporation cavity 12 is connected with the steam inlet 31 of the front tube box 30 on the next adjacent evaporation cavity 12 through a pipeline, so that the secondary steam in the previous evaporation cavity 12 flows into the next adjacent front tube box 30 through the secondary steam outlet 13 and the pipeline which are communicated with the evaporation cavity 12 and the steam inlet 31 on the next adjacent front tube box 30, and then flows into the heat exchange tube bundle 20 in the next adjacent evaporation cavity 12. The whole multi-effect membrane evaporation system is integrated, the structure is more compact, and the space occupation is reduced, and the consumption of pipes is saved.

In the present application, "connected" means that the two are connected and communicated with each other.

The number of the evaporation chambers 12 in the housing 10 is determined by the number of the partition plates 11, and if the number of the partition plates 11 is n, and n is an integer greater than or equal to 1, the number of the evaporation chambers 12 is n + 1. For example, if n is 1, two evaporation chambers 12 are provided in the casing 10, that is, a partition 11 divides the interior of the casing 10 into two evaporation chambers 12, and the vapor inlet 31 of the front header 30 on one of the evaporation chambers 12 is connected to the heat source. When n is 2, three evaporation chambers 12 are arranged in the shell 10, namely two partition plates 11 are arranged at intervals to divide the interior of the shell 10 into the three evaporation chambers 12, and the steam inlet 31 of the front tube box 30 positioned on one of the evaporation chambers 12 at the outermost side of the multi-effect integrated falling film evaporation system is connected with a heat source. In the present embodiment, n is 1, that is, the number of the partition plates 11 is one, and one partition plate 11 divides the interior of the casing 10 into two evaporation chambers 12.

The bottom of the shell 10 is further provided with at least two feed liquid outlets, the feed liquid outlets are respectively communicated with the evaporation cavity 12, and the solution in the evaporation cavity 12 is discharged from the feed liquid outlets. The shell 10 is further provided with at least two maintenance ports 14, the maintenance ports 14 are respectively communicated with the evaporation cavity 14, and the maintenance ports 14 are used for workers to enter the evaporation cavity 12 for overhauling and cleaning. It should be noted that, when the multiple-effect integrated falling film evaporation system is used, an opening and closing door is arranged at the maintenance opening 14 to seal the maintenance opening 14. The number of service openings 14 is equal to the number of evaporation chambers 12. In the present embodiment, since the number of the evaporation chambers 12 is two, the number of the maintenance ports 14 is two, and the two maintenance ports 14 are respectively provided at both ends of the housing 10.

Referring to fig. 1 and 2, in particular, the housing 10 includes an evaporation tank 15 and at least two vapor collection boxes 16, and a partition 11 is disposed inside the evaporation tank 15 to divide the inside of the evaporation tank 15 into at least two evaporation chambers 12. Specifically, the partition plate 11 and the evaporation tank 15 are both made of a metal material, and the edge of the partition plate 11 is welded to the inner wall of the evaporation tank 15. The steam collecting boxes 16 are all arranged on the top of the evaporating pot 15 and are respectively communicated with the evaporating cavities 12, the secondary steam outlets 13 are respectively arranged on the upper parts of the steam collecting boxes 16, and the feed liquid outlets are arranged at the bottom of the evaporating pot 15.

A demister 17 is arranged in the steam collecting box 16, the demister 17 is arranged between the evaporation cavity 12 and the secondary steam outlet 13, and the demister 17 is used for removing liquid drops brought by the secondary steam generated in the evaporation cavity 12. The demister 17 is a wire mesh type demister or a scraper type demister.

The heat exchange tube bundle 20 is transversely disposed within the evaporator tank 15. The number of bundles 20 is equal to the number of evaporation chambers 12, i.e. one bundle 20 is provided in each evaporation chamber 12. In the present embodiment, since the number of the evaporation chambers 12 is two, the number of the heat exchange tube bundles 20 is two.

The number of front headers 30 is equal to the number of evaporation chambers 12, i.e. one front header 30 is provided for each evaporation chamber 12. In the present embodiment, since the number of the evaporation chambers 12 is two, the number of the front header 30 is two, and the two front headers 30 are respectively disposed at the opposite ends of the casing 10, and further, the two front headers 30 are respectively disposed at the opposite ends of the evaporation tank 15.

The top of the front channel box 30 is provided with a non-condensable gas outlet 32, the bottom of the front channel box 30 is provided with a first distilled water outlet 33, and the steam in the heat exchange tube bundle 20 and part of distilled water generated after heat exchange between the spraying outside the heat exchange tube bundle 20 are discharged through the first distilled water outlet 33.

The multiple-effect integrated falling film evaporation system further comprises at least two rear pipe boxes 40, the rear pipe boxes 40 are respectively arranged in the evaporation cavity 12, the rear pipe boxes 40 are respectively connected with one ends, far away from the front pipe box 30, of the heat exchange pipe bundles 20, second distilled water outlets 41 are arranged at the bottoms of the rear pipe boxes 40, the second distilled water outlets 41 are located outside the shell 10, specifically, the second distilled water outlets 41 are located outside the evaporation tank 15, and steam in the heat exchange pipe bundles 20 and part of distilled water generated after heat exchange outside the heat exchange pipe bundles 20 are discharged through the second distilled water outlets 41. The number of the back-channel boxes 40 is equal to the number of the evaporation chambers 12, that is, one back-channel box 40 is arranged in each evaporation chamber 12, and the back-channel box 40 is arranged between the partition plate 11 and the heat exchange tube bundle 20.

The multiple-effect integrated falling film evaporation system further comprises at least two solution sprayers 50, the solution sprayers 50 are respectively arranged in the evaporation cavity 12, the solution sprayers 50 are arranged corresponding to the heat exchange tube bundles 20, specifically, the solution sprayers 50 are arranged right above the heat exchange tube bundles 20, a solution spraying inlet 51 and a plurality of solution spraying outlets are formed in the solution sprayers 50, the solution spraying inlet 51 is exposed out of the shell 10, specifically, the solution spraying inlet 51 is exposed out of the evaporation tank 15, and the solution spraying inlet 51 supplies solution to enter the solution sprayers 50. The solution spray outlet is connected with a nozzle 60. The solution spray outlet is used for spraying out the solution in the solution sprayer 50.

Referring to fig. 1 and 3, the multiple-effect integrated falling film evaporation system further includes at least two thermal wells 70 and at least two circulation pumps 80, inlets of the thermal wells 70 are respectively connected to two feed liquid outlets on the shell 10, outlets of the thermal wells 70 are respectively connected to inlets of the circulation pumps 80 through pipes, and the thermal wells 70 are used for storing a material stock solution and an evaporated and concentrated circulation liquid. The bottom of the hot well 70 is also provided with a hand hole 71, and workers can clean large-particle materials in the hot well through the hand hole 71. The upper part of the hot well 70 is also provided with a stock solution inlet 72, and the stock solution inlet 72 is used for feeding stock solution of materials into the hot well 70. Still be provided with filter screen 73 in the hot-well 70, filter screen 73 is used for the aquatic large granule material of solution, prevents that the large granule material from getting into the impeller of damage circulating pump 8 in the circulating pump 80. The outlets of the circulating pumps 80 are respectively connected with the solution spraying inlets 51 on the solution sprayer 50 through pipes.

When the multiple-effect integrated falling-film evaporation system works, heating steam enters the front header 30 connected with a heat source and then enters the heat exchange tube bundle 20 connected with the front header 30, meanwhile, a circulating pump 80 pumps the solution in the hot well 70 into the solution sprayer 50, the solution in the solution sprayer 50 is uniformly sprayed onto the outer wall of the heat exchange tube bundle 20 through a plurality of nozzles 60, the solution outside the heat exchange tube bundle 20 absorbs heat and is gradually vaporized, the steam in the heat exchange tube bundle 20 is released and is condensed, the unvaporized solution in the evaporation cavity 12 flows into the hot well 70 and then is pumped into the solution sprayer 50 again through the circulating pump 80, the circulation is carried out until the concentration of the solution reaches a preset value, the vaporized secondary steam in the evaporation cavity 12 flows into the steam collecting box 16 and then enters the next front header 30 through the secondary steam outlet 13, a pipeline and the steam inlet 31 of the next front header 30, and then enters the heat exchange tube bundle 20 connected with the next front tube box 30 to perform heat exchange operation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A multiple-effect integrated falling film evaporation system is characterized by comprising:

at least two front tube boxes which are respectively connected with one end of the heat exchange tube bundle; the front pipe box is provided with a steam inlet; the secondary steam outlet of the former evaporation cavity is connected with the steam inlet of the front tube box on the adjacent evaporation cavity behind through a pipeline.

2. The multiple-effect integrated falling film evaporation system according to claim 1, wherein the shell comprises an evaporation tank and at least two vapor collection boxes, the partition is arranged inside the evaporation tank to divide the inside of the evaporation tank into at least two evaporation chambers, the vapor collection boxes are both arranged on the top of the evaporation tank and are respectively communicated with the evaporation chambers, and the secondary vapor outlets are respectively arranged on the vapor collection boxes.

3. The multiple effect integrated falling film evaporation system according to claim 2, wherein a demister is arranged in the steam collection box, and the demister is arranged between the evaporation chamber and the secondary steam outlet.

4. The multiple-effect integrated falling film evaporation system according to claim 1, wherein the top of the front tube box is provided with a non-condensable gas outlet, and the bottom of the front tube box is provided with a first distilled water outlet.

5. The multiple-effect integrated falling film evaporation system according to claim 1, further comprising at least two rear tube boxes, wherein the rear tube boxes are arranged in the evaporation cavity and are respectively connected with one ends of the heat exchange tube bundles far away from the front tube boxes, a second distilled water outlet is arranged at the bottom of each rear tube box, and the second distilled water outlet is located outside the shell.

6. The multiple-effect integrated falling film evaporation system according to claim 1, wherein the shell is further provided with at least two maintenance ports, and the maintenance ports are respectively communicated with the evaporation cavities.

7. The multiple-effect integrated falling film evaporation system according to claim 1, further comprising at least two solution sprayers, wherein the solution sprayers are respectively arranged in the evaporation cavity and are arranged corresponding to the heat exchange tube bundle, and the solution sprayers are provided with a solution spraying inlet and a plurality of solution spraying outlets.

8. The multiple-effect integrated falling film evaporation system according to claim 7, wherein the bottom of the shell is provided with at least two feed liquid outlets which are respectively communicated with the evaporation cavities; the multi-effect integrated falling film evaporation system further comprises at least two hot wells and at least two circulating pumps, inlets of the hot wells are respectively connected with the feed liquid outlets, outlets of the hot wells are respectively connected with inlets of the circulating pumps through pipelines, and outlets of the circulating pumps are respectively connected with the solution spraying inlets through pipelines.

9. The multiple effect integrated falling film evaporation system of claim 8, wherein the bottom of the hot well is further provided with a hand hole.

10. The multiple effect integrated falling film evaporation system according to claim 8, wherein a filter screen is further provided in the hot well.