CN114288759A - A pneumatic high-efficiency defoaming device for evaporative separation equipment - Google Patents

Abstract

The invention discloses a pneumatic high-efficiency defoaming device for evaporation separation equipment, which relates to the technical field of water treatment and comprises a separator shell, wherein a material liquid outlet is formed in the bottom of the separator shell, a secondary steam outlet is formed in the top of the separator shell, a material liquid inlet is formed in the side wall of the separator shell, a pneumatic defoaming device and a wire mesh defoaming device are sequentially arranged in the separator shell from bottom to top, a sealing structure is arranged in the separator shell, the separator shell is divided into an upper part and a lower part by the sealing structure, and the pneumatic defoaming device penetrates through the sealing structure. According to the invention, the secondary steam in the separator shell is subjected to grading treatment through the pneumatic defoaming device arranged in the separator shell and the wire mesh defoaming device arranged at the top of the pneumatic defoaming device, the pneumatic defoaming device is used for performing rough treatment on the secondary steam, and the wire mesh defoaming device is used for performing fine treatment on the secondary steam, so that the wire mesh defoaming device is prevented from blocking and scaling to influence the stable operation of an evaporation system.

Description

A pneumatic high-efficiency defoaming device for evaporative separation equipment

technical field

The invention relates to the technical field of water treatment, in particular to a gas-liquid separation device, in particular to a pneumatic high-efficiency defoaming device for evaporative separation equipment.

Background technique

During the evaporative crystallization process, the secondary steam generated by the waste water is easy to entrain a large amount of droplet-shaped material; Increase the treatment cost; (2) The material foam can easily lead to fouling and blockage of the device, which will seriously cause the system to fail to operate normally; (3) If the evaporation system adopts the mechanical vapor compression technology, the secondary steam containing a large amount of material foam will also cause the compressor. The impeller and casing corrode, causing heavy losses. Therefore, how to efficiently remove the entrainment of material and foam in the secondary steam has become a problem that cannot be ignored in the design of evaporative crystallization separation equipment.

At present, most evaporation manufacturers design a defoaming device on the top of the crystallization separator to separate the mist droplets in the secondary steam. The wire mesh de-foaming device has a good effect on the removal of droplets, especially for the interception of droplets with small particle size. Crystallization is formed in the gaps in the wire mesh defoaming device, resulting in blockage and scaling of the demister, increasing secondary steam flow rate, lower and lower droplet interception efficiency, higher and higher operating pressure drop, and ultimately causing the system to fail to continue. ,Stable operation. The baffle type demister uses inertia to make the droplets hit the surface of the baffle plate, so as to be intercepted, so the baffle plate is only effective for intercepting large particle droplets, and intercepting small particle size droplets. The effect is very small, so the separation efficiency is low.

The existing defoaming device is easy to scale and then cause blockage, so that the evaporative crystallization system cannot operate continuously and stably.

SUMMARY OF THE INVENTION

Therefore, the embodiments of the present invention provide a pneumatic high-efficiency defoaming device for evaporative separation equipment, so as to solve the problems of low defoaming efficiency of the separation device and easy scaling and blockage of the defoaming device.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

A pneumatic high-efficiency defoaming device for evaporative separation equipment, comprising a separator shell, the bottom of the separator shell is provided with a material liquid outlet, the top of the separator shell is provided with a secondary steam outlet, the separator The side wall of the shell is provided with a material and liquid inlet, the inside of the separator shell is sequentially provided with a pneumatic de-foaming device and a wire mesh de-foaming device from bottom to top, a sealing structure is arranged in the separator shell, and the sealing structure The separator housing is divided into upper and lower parts, and the pneumatic defoaming device passes through the sealing structure.

Optionally, the sealing structure includes an upper sealing plate and a lower sealing plate, the upper sealing plate and the lower sealing plate are parallel, and the outer sides of the upper sealing plate and the lower sealing plate and the separator housing Fixed connection, the upper and lower sides of the pneumatic defoaming device are respectively fixedly connected to the upper side of the upper sealing plate and the lower sealing plate.

Optionally, the pneumatic defoaming device is composed of a plurality of pneumatic defoaming units, and the plurality of pneumatic defoaming units are arranged in triangular or square arrangement.

Optionally, the pneumatic defoaming unit includes an outer cylinder, a central cylinder, a primary guide vane and a secondary guide vane, the top of the outer cylinder is fixedly connected to the inner side of the upper sealing plate, and the outer cylinder is The bottom of the body is fixedly connected to the inner side of the lower sealing plate, the central cylinder is fixedly connected to the inside of the outer cylinder, the axis of the central cylinder coincides with the axis of the outer cylinder, and the secondary guide vanes are connected to the outer cylinder. The first-level guide vanes are fixedly connected to the upper and lower ends of the central cylinder, respectively, and a number of guide grooves are fixedly connected to the inner side wall of the outer cylinder, and the guide grooves pass through the first-level guide vanes and the The gap between the secondary guide vanes.

Optionally, both the first-level guide vane and the second-level guide vane are composed of several blades, and the angle between the second-level guide vane and the horizontal plane is smaller than the angle between the first-level guide vane and the horizontal plane, and Several of the first-stage guide vanes and the second-stage guide vanes are distributed in a circular array with the center cylinder axis as the center.

Optionally, the blade has a planar shape or a curved shape.

Optionally, the bottom of the wire mesh de-foaming device is fixed to the inner wall of the separator housing through a support structure.

Optionally, a flushing device is provided above the wire mesh de-foaming device.

Optionally, the flushing device consists of a spray pipe network and high-efficiency nozzles or consists of several single-fluid spray guns.

The present invention has at least the following beneficial effects:

Through the pneumatic defoaming device and the wire mesh defoaming device arranged in the separator shell, after the secondary steam enters the separator shell through the material liquid inlet, the interior of the separator shell is sealed by the sealing structure, so that the secondary steam can only be The pneumatic defoaming device that can enter the sealing structure, through the pneumatic defoaming device, filters the large-diameter droplets in the secondary steam. The droplets pass through the pneumatic defoaming device and enter the wire mesh defoaming device. The small particle size droplets are intercepted and filtered by the wire mesh defoaming device, and the droplets of different particle sizes are classified, so that it is not easy to cause blockage. Ensure that the device can continue to operate stably.

Description of drawings

In order to illustrate the prior art and the present invention more clearly, the following briefly introduces the prior art and the accompanying drawings that are required to describe the embodiments of the present invention. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other drawings can also be derived from the provided drawings without creative effort.

The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention. Modifications, changes in proportional relationships or adjustments in size should still fall within the scope of the technical content disclosed in the present invention without affecting the functions and goals achieved by the present invention.

1 is a schematic diagram of the internal structure of an embodiment of the present invention;

2 is a schematic diagram of the internal structure of an outer cylinder according to an embodiment of the present invention;

3 is a top view of a pneumatic defoaming unit according to an embodiment of the present invention;

Fig. 4 is the schematic diagram of the equilateral triangle arrangement structure of the pneumatic defoaming unit of the present invention;

Fig. 5 is the schematic diagram of the square arrangement structure of the pneumatic defoaming unit of the present invention;

6 is a schematic diagram of the structure of the center cylinder of the present invention;

7 is a schematic diagram of the overall structure of the pneumatic defoaming unit of the present invention;

Description of reference numbers:

1. Separator shell; 2. Material liquid outlet; 3. Material liquid inlet; 4. Secondary steam outlet; 5. Sealing structure; 51. Upper sealing plate; 52. Lower sealing plate; 6. Pneumatic defoaming device; 61. Pneumatic defoaming unit; 611, outer cylinder; 612, central cylinder; 613, primary guide vane; 614, secondary guide vane; 615, guide groove; 7, wire mesh defoaming device; 8, Blade; 9. Support structure; 10. Washing device.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

In the description of the present invention, unless otherwise specified, "plurality" means two or more. For a solution with a sequential flow, this term expression does not need to be construed as describing a specific sequence or sequence, and for a device structure solution, this term expression does not have any distinction of importance, positional relationship, or the like.

Furthermore, the terms "comprising", "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Instead, those steps or units may also include other steps or units that are not explicitly listed but are inherent to these processes, methods, products or devices, or added steps or units based on further optimized solutions of the present inventive concept.

As shown in Figures 1 and 2, a pneumatic high-efficiency defoaming device for evaporative separation equipment includes a separator shell 1, the bottom of the separator shell 1 is provided with a material liquid outlet 2, and the top of the separator shell 1 is provided with a The secondary steam outlet 4 is used to discharge the treated secondary steam. The side wall of the separator shell 1 is provided with a material liquid inlet 3, and the high-salt waste water enters the separator shell 1 through the material liquid inlet 3, and the negative Flash evaporation occurs under the high pressure operating environment, and part of the water in the feed liquid evaporates to form secondary steam; the unevaporated feed liquid enters the external circulation heating system through the feed liquid outlet 2, and after heating, it enters the separation through the feed liquid inlet 3. Inside the separator shell 1, a cyclic evaporation process is formed; the separator shell 1 is sequentially provided with a pneumatic de-foaming device 6 and a wire mesh de-foaming device 7 from bottom to top, and the secondary steam carries a large number of droplets. The foam will pass through the pneumatic de-foaming device 6, the wire mesh de-foaming device 7, and the secondary steam outlet 4 in sequence, and then enter the next effect or compressor. The separator shell 1 is provided with a sealing structure 5, and the sealing structure 5 separates the The interior of the separator shell 1 is divided into upper and lower parts, and the pneumatic defoaming device 6 passes through the sealing structure 5, and a closed cavity is formed between the sealing structure 5, the separator shell 1 and the pneumatic defoaming device 6, so that the The secondary steam can only move upwards through the pneumatic defoaming device 6. Under the action of aerodynamic force, the secondary steam can remove most of the foam droplets, so that the untreated secondary steam entering from the material liquid inlet 3 can only be removed. It can enter the pneumatic defoaming device 6, and intercept the large-diameter droplets through the pneumatic defoaming device 6. Because the pneumatic defoaming device 6 is not easy to block, and the small droplets are small due to their small mass, the pneumatic defoaming device 6 is not easy. Under the action of pneumatic centrifugal force, it cannot be completely intercepted, so most of the droplets with small particle size pass through the pneumatic defoaming device 6 .

After passing through the pneumatic defoaming device 6, when the secondary steam entrained with small particle size droplets passes through the wire mesh defoaming device 7, under the action of inertial force, the secondary steam will continue to move forward through the wire mesh, while the droplets will continue to move forward. During the movement, it will hit the wire mesh, and a liquid film will be formed on the surface of the wire mesh, which will then settle to the bottom of the wire mesh de-foaming device 7 by gravity. When the droplets reach a certain size, they will fall off the filaments under the action of gravity, thus completing the interception of small droplets. When passing through the wire mesh defoaming device 7, a liquid film or droplet will be formed on the surface of the filament. After the liquid film or droplet reaches a certain size, it will flow along the filament to the junction of the filament under the action of gravity. It has wettable properties. Due to the surface tension of the liquid, the droplets will gradually increase. When the droplets accumulate to a point where the gravity is greater than the surface tension, the droplets will fall off the filaments, thereby realizing the interception of small droplets in the secondary steam. After the secondary steam passes through the pneumatic defoaming device 6 and the wire mesh defoaming device 7, the material droplets are basically intercepted, thereby removing impurities in the secondary steam, obtaining clean condensed water, and reducing the corrosion to subsequent equipment. And the risk of scaling, so it is not easy to cause blockage, and then to ensure the continuous and stable operation of the device, where the large particle size refers to the droplets larger than 15μm, and the small droplets refer to the droplets below 15μm.

As shown in Figures 1 and 2, the sealing structure 5 includes an upper sealing plate 51 and a lower sealing plate 52 arranged in parallel. 51 and the sealing between the lower sealing plate 52 and the separator shell 1, prevent the untreated secondary steam from directly entering the upper wire mesh de-foaming device 7 without passing through the pneumatic de-foaming device 6 and causing it to be blocked. The inner side of the plate 51 is welded and fixed to the top of the pneumatic defoaming device 6, the inner side of the lower sealing plate 52 is welded to the bottom of the pneumatic defoaming device 6, the upper sealing plate 51, the lower sealing plate 52 and the separator shell 1 and the pneumatic defoaming device 6. Between the devices 6, a closed cavity is formed, so that the secondary steam can only move upwards through the pneumatic defoaming device 6. In this embodiment, the upper sealing plate 51 and the lower sealing plate 52 are arranged parallel to the horizontal plane, which is convenient for construction. It is suitable for separators with smaller diameters. At the same time, the upper sealing plate 51 and the lower sealing plate 52 can also be inclined at a certain angle with the horizontal plane. When the upper sealing plate 51 and the lower sealing plate 52 have an included angle with the horizontal plane, The outer side of the upper sealing plate 51 is higher than the inner side, and the outer side of the lower sealing plate 52 is lower than the inner side, which is conducive to the upward circulation of secondary steam, avoids the formation of dead corners, and reduces the risk of scaling. The condensed water and the intercepted mist droplets can quickly flow into the bottom of the separator through the pneumatic defoaming device 6, thereby further reducing the entrainment of foam in the secondary steam.

As shown in Figures 1 and 2, the pneumatic defoaming device 6 is composed of a plurality of pneumatic defoaming units 61. The pneumatic defoaming unit 61 adopts a standard cylinder with a smaller diameter, so that large-scale large-scale processing and manufacturing can be realized, reducing the Equipment processing time and cost reduction. As shown in Figure 4 and Figure 5, multiple pneumatic defoaming units 61 can be arranged in a regular triangle or square. According to the volume flow of secondary steam and process requirements, defoaming can be carried out according to the actual situation. Arbitrary combination of units, the pneumatic defoaming unit 61 can also be one, the number of pneumatic defoaming units 61 is selected according to the size of the separator shell 1, when the number of pneumatic defoaming units 61 is large, it is advisable to use a triangular arrangement , When there are few pneumatic defoaming units 61, a square arrangement should be used. In this embodiment, seven pneumatic defoaming units 61 are used, and the seven pneumatic defoaming units 61 are arranged in a regular triangle.

As shown in Figures 1 and 2, the pneumatic defoaming unit 61 includes an outer cylinder 611, a central cylinder 612, a first-level guide vane 613 and a second-level guide vane 614. According to the requirements for the interception efficiency of the process material, the first-level guide vane can be used. Or multi-stage guide vanes, this embodiment adopts two-stage guide vanes, wherein the top of the outer cylinder 611 is fixedly connected to the inner side of the upper sealing plate 51, the bottom of the outer cylinder 611 is fixed to the inner side of the lower sealing plate 52, and the outer cylinder 611 is fixed to the inner side of the lower sealing plate 52. The body 611 is a straight cylinder structure, the diameter of the outer cylinder 611 is 200mm-600mm, the height of the outer cylinder 611 is 300mm-2000mm according to the series of the primary guide vanes 613 and the secondary guide vanes 614, and the central cylinder 612 is fixed on the outer cylinder. Inside 611, the central cylinder 612 and the outer cylinder 611 are both cylindrical, and the axes of the two coincide, wherein the bottom part of the central cylinder 612 protrudes from the outer cylinder 611, and the upper end of the central cylinder 612 and the outer cylinder 611 extend. The lower ends are all conical, which can reduce the resistance of the secondary steam passage. As shown in Figures 3 and 7, a number of through-length diversion grooves 615 are fixedly connected to the inner wall of the outer cylinder 611. The diversion grooves 615 Passing through the gap between the primary guide vane 613 and the secondary guide vane 614, the guide groove 615 is L-shaped, its projection on the horizontal plane is an L-shape, and one side of the L-shape is vertically welded to the inner wall of the outer cylinder 611 , after the secondary steam containing the droplets of the droplets passes through the primary guide vanes 613 and the secondary guide vanes 614, the droplets move to the outer cylinder wall of the pneumatic defoaming unit 61 under the action of centrifugal force, and condense on the cylinder wall The large droplets are intercepted by the guide groove 615 during the movement process, so that the large droplets quickly fall into the bottom space of the separator along the guide groove 615, thereby further reducing the entrainment of material in the secondary steam.

As shown in FIG. 1 and FIG. 6 , the first-stage guide vanes 613 and the second-stage guide vanes 614 are composed of several vanes 8. The number of vanes 8 of a single-stage guide vane is the same as that of the guide grooves 615. 8 is fixedly connected with the center cylinder 612, and the blades 8 of the first-level guide vanes 613 and the second-level guide vanes 614 are centered on the axis of the center cylinder 612, and are distributed on the outer wall of the center cylinder 612 in a circular array, and the number of the blades 8 can be adjusted. The arrangement is made according to the actual situation. In this embodiment, 12 single-stage guide vanes are used, and the vane 8 is in the shape of a curved surface, that is, the angle between the inner and outer edges of the vane 8 and the horizontal plane is different, and the angle between the inner and outer edges of the vane 8 and the horizontal plane is 30°. Any angle between -60°, and the angle between the secondary guide vane 614 and the horizontal plane is smaller than the angle between the primary guide vane 613 and the horizontal plane, because the smaller the angle between the vane 8 and the horizontal plane, the smaller the droplet's impact on the small droplets. The greater the pneumatic centrifugal force is, the higher the efficiency of the pneumatic defoaming device 6 is. Therefore, the primary guide vane 613 performs rough treatment on the material foam, and the secondary guide vane 614 performs fine processing on the material foam, and the blade 8 can also be Plane shape, the projected outline of the blade 8 on the horizontal plane is a rectangle or a fan shape, and the blade 8 projected as a rectangle is easy to process, and can be used when the requirement for de-foaming efficiency is not high; The foaming efficiency is high, and it can be used when the requirements for the foaming removal efficiency are high. In this embodiment, the blade 8 projected into a fan shape is used.

As shown in FIG. 1 , the wire mesh de-foaming device 7 is fixedly connected to the inner wall of the separator housing 1 through a support structure 9, the support structure 9 is an annular support plate, and the wire mesh de-foaming device 7 is fixed on the annular support plate, The annular support plate is fixed on the inner side wall of the separator housing 1, and the wire mesh de-foaming device 7 is supported and fixed by the annular support plate.

As shown in FIG. 1 , a flushing device 10 is arranged above the wire mesh de-foaming device 7 , and the flushing device 10 is composed of a spray pipe network and high-efficiency nozzles, or several single-fluid spray guns. The flushing device 10 uses clean flushing water, and under high pressure, fine particles with a certain impact force are formed at the nozzle outlet, and the wire mesh de-foaming device 7 is fully covered by spray flushing. When the pneumatic de-foaming device 6 and the When the running resistance of the wire mesh de-foaming device 7 is high, it indicates that the pneumatic de-foaming device 6 and the wire mesh de-foaming device 7 are blocked to a certain extent. Spray flushing to reduce the risk of structural blockage, thereby reducing the entrainment of foam in the secondary steam, and also enabling the evaporation system to operate stably and continuously.

The present invention is mainly composed of a pneumatic defoaming device 6 and a wire mesh defoaming device 7, and the two sets of devices are used in series. The droplets with small particle size below 15μm make the interception efficiency of the secondary steam higher, and the pneumatic defoaming device 6 is not easy to block, and is used to intercept large particle size droplets. Foaming device 7; wire mesh defoaming device 7 is easy to be fouled and blocked, and is only used to intercept the remaining small amount of droplets; droplets of different particle sizes are classified and treated, and the advantages of each device are used to achieve high-efficiency removal of secondary steam. foam.

The process principle of the present invention is as follows: the high-salt waste water enters the separator shell 1 through the feed liquid inlet 3, and flashes under the negative pressure operating environment, and part of the water in the feed liquid evaporates to form secondary steam; The liquid enters the external circulation heating system through the material liquid outlet 2. After heating, it enters the separator shell 1 through the material liquid inlet 3, thereby forming a cyclic evaporation process; the secondary steam carries a large amount of droplet-shaped material foam. After passing through the pneumatic defoaming device 6, the wire mesh defoaming device 7, and the secondary steam outlet 4 in sequence, it enters the next effect or compressor.

In the pneumatic defoaming device 6, after the secondary steam passes through the guide vanes, the material droplets flow to the outer cylinder wall and collect under the action of centrifugal force. 615 intercepts and falls into the slurry pool at the bottom of the separator along the guide groove 615; under the interference of the guide vanes, the flow velocity of the secondary steam changes from the axial direction to the partial tangential direction, so that the overall flow velocity increases, but the axial direction The velocity is reduced, thereby increasing the residence time of the droplets in the gas space above the separator and reducing the height of the separator. Therefore, the limit particle size of droplets intercepted by this device is 15 μm, and the vast majority of large-diameter droplets are intercepted, reducing the processing capacity and scaling risk of the subsequent defoaming device; Small, the aerodynamic centrifugal force is small and cannot be intercepted completely.

The pneumatic defoaming device 6 is provided with multi-stage guide vanes. The vanes 8 of the guide vanes are arranged in a ring around the central cylinder 612 and are installed obliquely between the central cylinder 612 and the outer cylinder 611. The pneumatic defoaming device 6 uses the principle of swirl flow. , under the guide action of the blade 8, the centrifugal effect of the airflow is increased, the Brownian motion is strengthened, and the droplets in the secondary steam are intercepted and captured on the wall of the outer cylinder 611, which improves the interception efficiency of the secondary steam . The outer cylinder of the pneumatic defoaming device 6 is provided with several guide grooves 615, so that the intercepted droplets quickly fall to the bottom of the separator, thereby further reducing the entrainment of material foam in the secondary steam.

The design of the combined device for defoaming of the evaporative separation equipment is reasonable, and the flushing device 10 is arranged on the upper end of the wire mesh defoaming device 7, so that the device can be directly washed without the need for the pneumatic defoaming device 6 and the wire mesh to remove the foam. The device 7 is removed from the separator for flushing, which saves time and effort, facilitates the operation and maintenance of the equipment, and enhances the practicability.

The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features), for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described; The written examples should also be considered to be within the scope of the description in this specification.

The present invention has been described in more detail and in detail above through the general description and specific embodiments. It should be noted that, without departing from the concept of the present invention, it is obvious that some modifications and improvements can be made to these specific embodiments, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (9)

1. A pneumatic high-efficiency defoaming device for evaporative separation equipment, comprising a separator shell (1), characterized in that: a material liquid outlet (2) is provided at the bottom of the separator shell (1), and the separator The top of the shell (1) is provided with a secondary steam outlet (4), the side wall of the separator shell (1) is provided with a feed liquid inlet (3), and the inside of the separator shell (1) goes from bottom to A pneumatic de-foaming device (6) and a wire mesh de-foaming device (7) are arranged in sequence on the upper part of the separator, and a sealing structure (5) is arranged in the separator shell (1), and the sealing structure (5) separates the The device housing is divided into upper and lower parts, and the pneumatic defoaming device (6) passes through the sealing structure (5). 2. A pneumatic high-efficiency de-foaming device for evaporative separation equipment according to claim 1, characterized in that: the sealing structure (5) comprises an upper sealing plate (51) and a lower sealing plate (52), the upper sealing plate (52) The sealing plate (51) is parallel to the lower sealing plate (52), the outer sides of the upper sealing plate (51) and the lower sealing plate (52) are fixedly connected to the separator housing (1), the The upper and lower sides of the pneumatic defoaming device (6) are respectively fixedly connected to the inner side of the upper sealing plate (51) and the lower sealing plate (52). 3. A kind of pneumatic high-efficiency defoaming device for evaporative separation equipment according to claim 1, characterized in that: the pneumatic defoaming device (6) is composed of a plurality of pneumatic defoaming units (61), and a plurality of the The pneumatic defoaming unit (61) is arranged in an equilateral triangle or a square. 4. A pneumatic high-efficiency defoaming device for evaporative separation equipment according to claim 2, characterized in that: the pneumatic defoaming unit (61) comprises an outer cylinder (611), a central cylinder (612), a primary The guide vane (613) and the secondary guide vane (614), the top of the outer cylinder (611) is fixedly connected to the inner side of the upper sealing plate (51), and the bottom of the outer cylinder (611) is fixedly connected to Inside the lower sealing plate (52), the central cylinder (612) is fixedly connected to the inside of the outer cylinder (611), and the axis of the central cylinder (612) coincides with the axis of the outer cylinder (611). , the secondary guide vanes (614) and the primary guide vanes (613) are respectively fixedly connected to the upper and lower ends of the central cylinder (612), and the inner wall of the outer cylinder (611) is fixedly connected There are several guide grooves (615), and the guide grooves (615) pass through the gap between the first-level guide vane (613) and the second-level guide vane (614). 5. A pneumatic high-efficiency defoaming device for evaporative separation equipment according to claim 4, characterized in that: the first-level guide vane (613) and the second-level guide vane (614) are both composed of several blades (8) composition, the angle between the second level guide vane (614) and the horizontal plane is smaller than the angle between the first level guide vane (613) and the horizontal plane, and the first level guide vane (613) and the two The plurality of vanes (8) of the stage guide vanes (614) are distributed in a circular array with the axis of the central cylinder (612) as the center. 6 . The pneumatic high-efficiency defoaming device for evaporative separation equipment according to claim 5 , wherein the blade ( 8 ) is a plane shape or a curved surface shape. 7 . 7. A pneumatic high-efficiency defoaming device for evaporative separation equipment according to claim 1, characterized in that: the bottom of the wire mesh defoaming device (7) is fixed to the separator shell through a support structure (9). (1) Inner wall. 8 . The pneumatic high-efficiency defoaming device for evaporative separation equipment according to claim 1 , wherein a flushing device ( 10 ) is provided above the wire mesh defoaming device ( 7 ). 9 . 9 . The pneumatic high-efficiency defoaming device for evaporation and separation equipment according to claim 8 , wherein the flushing device ( 10 ) consists of a spray pipe network and high-efficiency nozzles or consists of several single-fluid spray guns. 10 .

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