CN114288759A - Pneumatic high-efficiency defoaming device for evaporation 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

Pneumatic high-efficiency defoaming device for evaporation separation equipment

Technical Field

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

Background

In the process of evaporative crystallization, a large amount of mist-drop-shaped foam is easily entrained in secondary steam generated by the wastewater; if the treatment is improper, (1) the impurity content in the secondary steam condensate water is high, secondary treatment is needed, and the treatment cost is increased; (2) the material foam is easy to cause scaling and blockage of the device, and can seriously cause the system to be incapable of normally operating; (3) if the evaporation system adopts a mechanical vapor compression technology, secondary vapor containing a large amount of foam can also cause the impeller and the shell of the compressor to corrode, and great loss is caused. Therefore, how to remove the entrainment problem of the material in the secondary steam with high efficiency becomes a problem which is not negligible when the evaporation crystallization separation equipment is designed.

At present, most evaporation plants design a defoaming device at the top of a crystallization separator for separating fog drops in secondary steam, and most defoaming devices adopt a wire mesh defoaming device or a baffle type demister. The silk screen removes the foam device and has better effect to getting rid of the fog droplet, especially has better to the fog droplet interception effect of small-size footpath, but in the actual operation process, carries the fog droplet volume because of the secondary steam great, and the fog droplet forms the crystallization in the silk screen removes the foam device internal gap easily, leads to demister jam, scale deposit, and the secondary steam velocity of flow is more and more high, and fog droplet interception efficiency is more and more low, and the operating pressure drop is more and more high, finally causes the unable continuous, the steady operation of system. The baffle type demister makes fog drops impact on the surface of the baffle plate by using the inertia effect so as to be intercepted, so that the baffle plate only has an effect on intercepting large-particle fog drops, the effect on intercepting small-particle-size fog drops is very small, and the separation efficiency is low.

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

Disclosure of Invention

Therefore, the embodiment of the invention provides a pneumatic high-efficiency defoaming device for an evaporation separation device, and aims to solve the problems that the defoaming efficiency of a separation device is low, and the defoaming device is easy to scale and block.

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

the utility model provides an evaporation separation is pneumatic high-efficient foam removing device for equipment, includes the separator casing, the feed liquid export has been seted up to the bottom of separator casing, the secondary steam export has been seted up at the top of separator casing, the feed liquid import has been seted up to the lateral wall of separator casing, the inside from the bottom up of separator casing has set gradually pneumatic foam removing device and silk screen foam removing device, be provided with seal structure in the separator casing, seal structure handle the separator casing divides into upper and lower two parts, just pneumatic foam removing device passes seal structure.

Optionally, the sealing structure includes an upper sealing plate and a lower sealing plate, the upper sealing plate is parallel to the lower sealing plate, the outer sides of the upper sealing plate and the lower sealing plate are fixedly connected to the separator housing, and the upper and lower sides of the pneumatic defoaming device are respectively fixedly connected to the upper sides 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 a triangular shape or a square shape.

Optionally, the pneumatic defoaming unit comprises an outer cylinder, a central cylinder, a first-stage guide vane and a second-stage guide vane, the top of the outer cylinder is fixedly connected to the inner side of the upper sealing plate, the bottom of the outer cylinder is fixedly connected to the inner side of the lower sealing plate, the central cylinder is fixedly connected to the inner part of the outer cylinder, the axis of the central cylinder coincides with the axis of the outer cylinder, the second-stage guide vane and the first-stage guide vane are respectively and fixedly connected to the upper end and the lower end of the central cylinder, a plurality of guide grooves are fixedly connected to the inner side wall of the outer cylinder, and the guide grooves penetrate through gaps between the first-stage guide vane and the second-stage guide vane.

Optionally, the first-stage guide vane and the second-stage guide vane are both composed of a plurality of vanes, an included angle between the second-stage guide vane and a horizontal plane is smaller than an included angle between the first-stage guide vane and the horizontal plane, and the first-stage guide vane and the second-stage guide vane are all distributed in a circumferential array by taking the axis of the central cylinder as the center.

Optionally, the blade is planar or curved.

Optionally, the bottom of the wire mesh defoaming device is fixed on the inner wall of the separator shell through a supporting structure.

Optionally, a flushing device is arranged above the wire mesh defoaming device.

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

The invention has at least the following beneficial effects:

through setting up the pneumatic defoaming device and the silk screen defoaming device in the separator casing, back in the feed liquid import gets into the separator casing when the secondary steam, the inside seal structure that seals through the seal structure that seals of separator casing, make the secondary steam can only get into the pneumatic defoaming device in the seal structure, filter the big particle size liquid drop in the secondary steam through pneumatic defoaming device, because of it is relatively poor to the liquid drop filter effect of small particle size, make the liquid drop of small particle size pass on pneumatic defoaming device back gets into the silk screen defoaming device, carry out the interception filtration to small particle size liquid drop through the silk screen defoaming device, carry out stage treatment to the liquid drop of different particle sizes, thereby can be difficult to cause the jam, guarantee the device can last stable operation.

Drawings

In order to more clearly illustrate the prior art and the present invention, the drawings which are needed to be used in the description of the prior art and the embodiments of the present invention will be briefly described. It should be apparent that the drawings in the following description are merely exemplary, and that other drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.

The structures, proportions, sizes, and other dimensions shown in the specification are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, and it is to be understood that all such modifications, changes in proportions, or alterations in size which do not affect the efficacy or objectives of the invention are not to be seen as within the scope of the present invention.

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

FIG. 2 is a schematic view of the internal structure of the outer cylinder according to the embodiment of the present invention;

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

FIG. 4 is a schematic diagram of the regular triangle arrangement structure of the pneumatic defoaming unit of the present invention;

FIG. 5 is a schematic diagram of a square arrangement of pneumatic defoaming units according to the present invention;

FIG. 6 is a schematic view of the construction of the central cartridge of the present invention;

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

description of reference numerals:

1. a separator housing; 2. a feed liquid outlet; 3. a feed liquid inlet; 4. a secondary steam outlet; 5. a sealing structure; 51. an upper sealing plate; 52. a lower sealing plate; 6. a pneumatic defoaming device; 61. a pneumatic defoaming unit; 611. an outer cylinder; 612. a central barrel; 613. a first stage guide vane; 614. a secondary guide vane; 615. a diversion trench; 7. a wire mesh defoaming device; 8. a blade; 9. a support structure; 10. and (5) flushing the device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the description of the present invention, "a plurality" means two or more unless otherwise specified. For a scheme with a time sequence flow, the term expression does not need to be understood as describing a specific sequence or a sequence order, and for a scheme of a device structure, the term expression does not have distinction of importance degree, position relation and the like.

Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements specifically listed, but may include other steps or elements not expressly listed that are inherent to such process, method, article, or apparatus or that are added to a further optimization scheme based on the present inventive concept.

As shown in fig. 1 and 2, a pneumatic high-efficiency defoaming device for evaporation separation equipment comprises a separator shell 1, wherein a material liquid outlet 2 is formed in the bottom of the separator shell 1, a secondary steam outlet 4 is formed in the top of the separator shell 1 and used for discharging treated secondary steam, a material liquid inlet 3 is formed in the side wall of the separator shell 1, high-salinity wastewater enters the separator shell 1 through the material liquid inlet 3 and is subjected to flash evaporation in a negative-pressure operation environment, and partial moisture in the material liquid is evaporated to form secondary steam; the unevaporated feed liquid enters an external circulation heating system through a feed liquid outlet 2, and then enters a separator shell 1 through a feed liquid inlet 3 after being heated, so that a circulation evaporation process is formed; the separator shell 1 is internally provided with a pneumatic defoaming device 6 and a silk screen defoaming device 7 from bottom to top in sequence, secondary steam carries a large amount of fog-drop-shaped object foam and enters a next effect or a compressor after passing through the pneumatic defoaming device 6, the silk screen defoaming device 7 and a secondary steam outlet 4 upwards in sequence, a sealing structure 5 is arranged in the separator shell 1, the sealing structure 5 divides the interior of the separator shell 1 into an upper part and a lower part, the pneumatic defoaming device 6 penetrates through the sealing structure 5, a closed cavity is formed between the sealing structure 5 and the separator shell 1 and between the sealing structure 5 and the pneumatic defoaming device 6, so that the secondary steam can only move upwards through the pneumatic defoaming device 6, most of the object liquid drops can be removed by the secondary steam under the action of the pneumatic force, and untreated secondary steam entering from a feed liquid inlet 3 can only enter the pneumatic defoaming device 6, the pneumatic defoaming device 6 intercepts the liquid drops with large particle size, the pneumatic defoaming device 6 is not easy to block, and the small liquid drops with small particle size cannot be completely intercepted under the action of the pneumatic centrifugal force of the pneumatic defoaming device 6 due to small mass, so that most of the liquid drops with small particle size pass through the pneumatic defoaming device 6.

After passing through the pneumatic defoaming device 6, secondary steam carrying small-particle-size liquid drops passes through the screen mesh defoaming device 7, the secondary steam can pass through the screen mesh and continuously move forwards under the action of inertia force, the liquid drops can collide with the screen mesh in the moving process, a liquid film is formed on the surface of the screen mesh and then subsides to the bottom of the screen mesh defoaming device 7 by virtue of gravity, when the accumulated liquid drops reach a certain quantity, small liquid drops are gathered into large liquid drops, and the large liquid drops can fall off from the fine wires under the action of gravity after the liquid drops reach a certain size, so that the small liquid drops are intercepted, the screen mesh defoaming device 7 is woven by the fine wires, the compactness is high, the small-particle-size liquid drops can form the liquid film or liquid drops on the surface of the fine wires when passing through the screen mesh defoaming device 7, the liquid film or liquid drops can flow to the intersection point of the fine wires under the action of gravity after reaching the certain size, the fine wires have the wettability, and due to the surface tension effect of the liquid, the liquid drops are gradually increased, when the liquid drops are accumulated until the gravity is greater than the surface tension, the liquid drops fall off from the fine wires, so that the interception of small liquid drops in secondary steam is realized, the secondary steam is basically intercepted after passing through the pneumatic defoaming device 6 and the wire mesh defoaming device 7, so that impurities in the secondary steam are removed, clean condensed water is obtained, the risks of corrosion and scaling on subsequent equipment are reduced, the blockage is not easy to cause, and the continuous and stable operation of the device is ensured, wherein the large particle size refers to the liquid drops larger than 15 micrometers, and the small liquid drops refer to the liquid drops smaller than 15 micrometers.

As shown in fig. 1 and 2, the sealing structure 5 includes an upper sealing plate 51 and a lower sealing plate 52, which are arranged in parallel, the outer sides of the upper sealing plate 51 and the lower sealing plate 52 are welded with the housing of the separator, so as to ensure the sealing performance between the upper sealing plate 51 and the lower sealing plate 52 and the housing 1 of the separator, and prevent the untreated secondary steam from directly entering the upper wire mesh defoaming device 7 without passing through the pneumatic defoaming device 6 to cause blockage thereof, the inner side of the upper sealing plate 51 is welded and fixed on the top of the pneumatic defoaming device 6, the inner side of the lower sealing plate 52 is welded on the bottom of the pneumatic defoaming device 6, a closed cavity is formed between the upper sealing plate 51 and the lower sealing plate 52 and the housing 1 of the separator and the pneumatic defoaming device 6, so that the secondary steam can only move upwards through the pneumatic defoaming device 6, wherein, in this embodiment, the upper sealing plate 51 and the lower sealing plate 52 are arranged in parallel with the horizontal plane, be convenient for construction installation, be applicable to less diameter's separator, simultaneously upper seal plate 51 and lower seal plate 52 also can personally submit certain contained angle slope setting with the horizontal plane, when upper seal plate 51 and lower seal plate 52 have the contained angle with the horizontal plane, the upper seal plate 51 outside will be higher than the inboard, the outside of lower seal plate 52 will be less than the inboard, be favorable to the steam of secondary to upwards circulate, avoid forming the dead angle, reduce the scale deposit risk, upper seal plate 51 inclines to arrange simultaneously, make the comdenstion water of upper portion space and the fog droplet of interception can flow into the separator bottom through pneumatic demister 6 fast, thereby further reduce smuggleing secretly of thing foam in the steam of secondary.

As shown in fig. 1 and 2, the pneumatic defoaming device 6 is composed of a plurality of pneumatic defoaming units 61, the pneumatic defoaming units 61 adopt standard cylinders with smaller diameters, thereby realizing large-scale processing and manufacturing, reducing the processing time of equipment and the cost, as shown in fig. 4 and 5, the plurality of pneumatic defoaming units 61 may be arranged in a regular triangle or a square, according to the volume flow of the secondary steam and the technological requirements, the defoaming units can be combined randomly according to the actual situation, the number of the pneumatic defoaming units 61 can be 1, the number of the pneumatic defoaming units 61 is selected according to the size of the separator shell 1, when the number of pneumatic defoaming unit 61 is more, preferably adopt the triangle-shaped and arrange, when pneumatic defoaming unit 61 is less, preferably adopt the square arrangement, and 7 pneumatic defoaming units 61 are adopted to this embodiment, and 7 pneumatic defoaming units 61 are regular triangle-shaped and arrange.

As shown in fig. 1 and 2, the pneumatic defoaming unit 61 includes an outer cylinder 611, a central cylinder 612, a first-stage guide vane 613 and a second-stage guide vane 614, according to the requirement of the foam intercepting efficiency of the process object, one-stage or multi-stage guide vanes can be adopted, the present 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, the outer cylinder 611 is of a straight cylinder structure, the diameter of the outer cylinder 611 is 200mm to 600mm, the height of the outer cylinder 611 is 300mm to 2000mm according to the stage of the first-stage guide vane 613 and the second-stage guide vane 614, the central cylinder 612 is fixed inside the outer cylinder 611, the central cylinder 612 and the outer cylinder 611 are both cylinders, and the axes of the central cylinder 612 and the outer cylinder 611 are coincident, wherein the bottom of the central cylinder 612 extends out of the outer cylinder 611, the upper end of the central cylinder 612 and the lower end of the outer cylinder 611 are both arranged as cones, the resistance of the secondary steam passage can be reduced, as shown in fig. 3 and 7, a plurality of through-length guide grooves 615 are fixedly connected to the inner side wall of the outer cylinder 611, the guide grooves 615 penetrate through a gap between the first-stage guide vane 613 and the second-stage guide vane 614, the guide grooves 615 are L-shaped, the projection of the guide grooves 615 on the horizontal plane is L-shaped, one side of the L-shape is perpendicularly welded to the inner wall of the outer cylinder 611, the secondary steam containing droplets of the liquid droplets passes through the first-stage guide vane 613 and the second-stage guide vane 614, the liquid droplets move towards the outer cylinder wall of the pneumatic defoaming unit 61 under the action of centrifugal force and are condensed into large liquid droplets on the cylinder wall, and the large liquid droplets are intercepted by the guide grooves 615 in the movement process, so that the large liquid droplets rapidly fall into the bottom space of the separator along the guide grooves 615, and the entrainment of the particles in the secondary steam is further reduced.

As shown in fig. 1 and 6, each of the first-stage guide vane 613 and the second-stage guide vane 614 is composed of a plurality of vanes 8, the number of vanes 8 of the single-stage guide vane is the same as that of the guide groove 615, the plurality of vanes 8 are fixedly connected with the central cylinder 612, and the vanes 8 of the first-stage guide vane 613 and the second-stage guide vane 614 are circumferentially distributed on the outer wall of the central cylinder 612 around the axis of the central cylinder 612, the number of the vanes 8 can be arranged according to the actual situation, in this embodiment, 12 vanes are adopted for the single-stage guide vane, the vanes 8 are curved, that is, the included angles between the inner and outer edges of the vanes 8 and the horizontal plane are different, wherein the included angle between the inner and outer edges of the vanes 8 and the horizontal plane is any angle between 30 ° and 60 °, and the included angle between the second-stage guide vane 614 and the horizontal plane is smaller than the included angle between the first-stage guide vane 613 and the horizontal plane because the included angle between the vane 8 and the horizontal plane is smaller, the larger the pneumatic centrifugal force of small liquid drops is, namely the higher the efficiency of the pneumatic defoaming device 6 is, so that the primary guide vane 613 performs coarse treatment on the object foam liquid, the secondary guide vane 614 performs fine treatment on the object foam, the vane 8 can also be in a planar shape, the projection profile of the vane 8 on the horizontal plane is rectangular or fan-shaped, the processing of the vane 8 with the rectangular projection is convenient, and the pneumatic centrifugal force can be adopted when the defoaming efficiency is not high; the projection is that fan-shaped blade 8 is great to the air current influence degree, therefore removes the foam efficiency higher, can adopt when removing the foam efficiency requirement when higher, and this embodiment adopts the projection to be fan-shaped blade 8.

As shown in fig. 1, the wire mesh defoaming device 7 is fixedly connected to the inner wall of the separator housing 1 through a supporting structure 9, the supporting structure 9 is an annular supporting plate, the wire mesh defoaming device 7 is fixed on the annular supporting plate, the annular supporting plate is fixed on the inner side wall of the separator housing 1, and the wire mesh defoaming device 7 is supported and fixed through the annular supporting plate.

As shown in fig. 1, a flushing device 10 is arranged above the wire mesh defoaming device 7, and the flushing device 10 is composed of a spraying pipe network and a high-efficiency nozzle or a plurality of single-fluid spray guns. Washing unit 10 adopts clean sparge water, under higher pressure, form the fine particle that has certain impact force in the nozzle export, carry out the spray of full coverage to silk screen defoaming device 7 and wash, when pneumatic defoaming device 6 and silk screen defoaming device 7's running resistance is higher, it has certain jam to show pneumatic defoaming device 6 and silk screen defoaming device 7, washing unit 10 is used for spraying pneumatic defoaming device 6 and silk screen defoaming device 7 and washes, reduce the risk that the structure blockked up, thereby it smugglies secretly to reduce the thing foam among the secondary steam, also make evaporating system can be stable, continuous operation.

The device is mainly formed by combining a pneumatic defoaming device 6 and a silk screen defoaming device 7, the two devices are used in series, the pneumatic defoaming device 6 mainly removes liquid drops with large particle size of more than 15 micrometers, the silk screen defoaming device 7 mainly removes liquid drops with small particle size of less than 15 micrometers, so that the secondary steam has higher foam interception efficiency, the pneumatic defoaming device 6 is not easy to block and is used for intercepting liquid drops with large particle size, and most of the liquid drops pass through the silk screen defoaming device 7 after being intercepted; the wire mesh defoaming device 7 is easy to scale and block and is only used for intercepting residual liquid drops with small particle size; and (3) carrying out grading treatment on liquid drops with different particle sizes, and realizing efficient defoaming of secondary steam by utilizing the advantages of each device.

The process principle of the invention is as follows: high-salinity wastewater enters the separator shell 1 through the feed liquid inlet 3, flash evaporation is carried out under the negative pressure operation environment, and partial water in the feed liquid is evaporated to form secondary steam; the unevaporated feed liquid enters an external circulation heating system through a feed liquid outlet 2, and then enters a separator shell 1 through a feed liquid inlet 3 after being heated, so that a circulation evaporation process is formed; the secondary steam carries a large amount of fog-drop-shaped object foam, and the object foam upwards sequentially passes through the pneumatic defoaming device 6, the silk screen defoaming device 7 and the secondary steam outlet 4 and then enters a next effect or a compressor.

After the secondary steam passes through the guide vanes in the pneumatic defoaming device 6, the foam droplets flow and converge towards the outer cylinder wall under the action of centrifugal force, the small-particle-size droplets converge into large droplets, and finally the large droplets are intercepted by the guide groove 615 and fall into a 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 is changed from axial to partial tangential, so that the whole flow velocity is increased, but the axial velocity is reduced, the residence time of the fog drops in the gas space at the upper part of the separator is increased, and the height of the separator is reduced. Therefore, the intercepted limit particle size of the liquid drops is 15 microns, and the vast majority of large-particle-size liquid drops are intercepted, so that the treatment capacity and the scaling risk of a subsequent defoaming device are reduced; the small-particle-size liquid drops cannot be completely intercepted due to small mass and small pneumatic centrifugal force.

The pneumatic defoaming device 6 is provided with a plurality of stages of guide vanes, the vanes 8 of the guide vanes are annularly arranged around the central cylinder 612 and are obliquely arranged between the central cylinder 612 and the outer cylinder 611, and the pneumatic defoaming device 6 increases the centrifugal effect of airflow under the guide effect of the vanes 8 by utilizing the rotational flow principle, strengthens the Brownian motion, is beneficial to intercepting and capturing liquid drops in secondary steam on the wall of the outer cylinder 611, and improves the intercepting efficiency of the secondary steam. The outer cylinder of the pneumatic defoaming device 6 is provided with a plurality of guide grooves 615, so that intercepted liquid drops quickly fall into the bottom of the separator, and the entrainment of the material foam in the secondary steam is further reduced.

This kind of remove foam composite set to evaporation and separation equipment reasonable in design to, arrange washing unit 10 in the upper end of silk screen formula demister 7, can directly wash the device, need not to wash pneumatic defoaming device 6 and silk screen defoaming device 7 dismantlement from the separator in, labour saving and time saving, the operation maintenance of the equipment of being convenient for has strengthened the practicality.

All the technical features of the above embodiments can be arbitrarily combined (as long as there is no contradiction between the combinations of the technical features), and for brevity of description, all the possible combinations of the technical features in the above embodiments are not described; these examples, which are not explicitly described, should be considered to be within the scope of the present description.

The present invention has been described in considerable detail by the general description and the specific examples given above. It should be noted that it is obvious that several variations and modifications can be made to these specific embodiments without departing from the inventive concept, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. The utility model provides an evaporation and separation equipment is with pneumatic high-efficient defoaming device, includes separator casing (1), its characterized in that: feed liquid export (2) have been seted up to the bottom of separator casing (1), secondary steam export (4) have been seted up at the top of separator casing (1), feed liquid import (3) have been seted up to the lateral wall of separator casing (1), inside from the bottom up of separator casing (1) has set gradually pneumatic defoaming device (6) and silk screen defoaming device (7), be provided with seal structure (5) in separator casing (1), seal structure (5) are right the separator casing divides into upper and lower two parts, just pneumatic defoaming device (6) pass seal structure (5).

2. The pneumatic high-efficiency defoaming device for the evaporation separation equipment as claimed in claim 1, wherein: the sealing structure (5) comprises an upper sealing plate (51) and a lower sealing plate (52), the upper 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 with the separator shell (1), and the upper side and the lower side of the pneumatic defoaming device (6) are fixedly connected to the inner sides of the upper sealing plate (51) and the lower sealing plate (52) respectively.

3. The pneumatic high-efficiency defoaming device for the evaporation separation equipment as claimed in claim 1, wherein: the pneumatic defoaming device (6) is composed of a plurality of pneumatic defoaming units (61), and the plurality of pneumatic defoaming units (61) are arranged in a regular triangle or square shape.

4. The pneumatic high-efficiency defoaming device for the evaporation separation equipment as claimed in claim 2, wherein: the pneumatic defoaming unit (61) comprises an outer cylinder body (611), a central cylinder (612), a primary guide vane (613) and a secondary guide vane (614), the top of the outer cylinder (611) is fixedly connected with the inner side of the upper sealing plate (51), the bottom of the outer cylinder (611) is fixedly connected with the inner side of the lower sealing plate (52), the central cylinder (612) is fixedly connected to the inside of the outer cylinder (611), and the central cylinder (612) axis coincides with the outer cylinder (611) axis, the second-stage guide vane (614) and the first-stage guide vane (613) are respectively and fixedly connected with the upper end and the lower end of the central cylinder (612), the inner side wall of the outer cylinder body (611) is fixedly connected with a plurality of guide grooves (615), the guide groove (615) passes through a gap between the primary guide vane (613) and the secondary guide vane (614).

5. The pneumatic high-efficiency defoaming device for the evaporation separation equipment as claimed in claim 4, wherein: the first-stage guide vane (613) and the second-stage guide vane (614) are composed of a plurality of vanes (8), the included angle between the second-stage guide vane (614) and the horizontal plane is smaller than that between the first-stage guide vane (613) and the horizontal plane, and the first-stage guide vane (613) and the second-stage guide vane (614) are distributed in a circumferential array by taking the axis of the central cylinder (612) as the center.

6. The pneumatic high-efficiency defoaming device for the evaporation separation equipment as claimed in claim 5, wherein: the blade (8) is in a planar shape or a curved surface shape.

7. The pneumatic high-efficiency defoaming device for the evaporation separation equipment as claimed in claim 1, wherein: the bottom of the wire mesh defoaming device (7) is fixed on the inner wall of the separator shell (1) through a supporting structure (9).

8. The pneumatic high-efficiency defoaming device for the evaporation separation equipment as claimed in claim 1, wherein: a washing device (10) is arranged above the silk screen defoaming device (7).

9. The pneumatic high-efficiency defoaming device for the evaporation separation equipment as claimed in claim 8, wherein: the flushing device (10) consists of a spraying pipe network and a high-efficiency nozzle or a plurality of single-fluid spray guns.

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