CN112999759A - Novel vane type demister - Google Patents
Novel vane type demister Download PDFInfo
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- CN112999759A CN112999759A CN202110348531.XA CN202110348531A CN112999759A CN 112999759 A CN112999759 A CN 112999759A CN 202110348531 A CN202110348531 A CN 202110348531A CN 112999759 A CN112999759 A CN 112999759A
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- separator
- vane
- blade
- preseparator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- Chemical Kinetics & Catalysis (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention discloses a novel vane type demister, which relates to the technical field of demisters and comprises a shell, a preseparator and a separator, wherein one side surface of the shell is provided with an air inlet, the top of the shell is provided with an air outlet, the air inlet is communicated with the preseparator, the inside of the shell is provided with the separator, an air outlet of the preseparator corresponds to an air inlet of the separator, an air outlet of the top of the separator corresponds to the air outlet, and a liquid outlet end at the bottom of the separator is communicated with a condensate discharge pipe, wherein: the separator comprises a silk screen collector and a blade separator, the silk screen collector is arranged outside the blade separator, the blade separator comprises a plurality of blades vertically arranged in the shell, and the blades are arranged into a double-pocket structure. The invention avoids the condition of secondary entrainment and effectively increases the separation efficiency; the filter screen filter separator overcomes the defects of a screen filter separator, and has the effects of high efficiency, reasonable design, simple structure, convenience in cleaning, small volume, lower manufacturing cost, no energy consumption, small pressure drop of airflow, reliability and stability and effective reduction of investment cost.
Description
Technical Field
The invention relates to the technical field of demisters, in particular to a novel vane-type demister.
Background
Wire mesh mist eliminators have been used at the inlet of steam turbine compressors to remove condensate from the steam. Along with the improvement of steam turbine ability in the engineering application, the fatal defect of silk screen defroster is very obvious:
1. the wire diameter of the wire mesh is small, and is approximately 0.5mm (more than 3-5 microns of liquid drops need to be removed, and the liquid drops reach more than 99.8%), and the wire mesh is easy to break during repeated scouring and shaking of large-flow steam, so that mechanical damage is caused to a downstream steam turbine which runs at a high speed.
2. Because the density of the wire mesh is larger, the wire mesh type demister is easy to cause large pressure drop, lose a large amount of kinetic energy of steam and reduce the power generation amount of the steam turbine.
3. Since the wire mesh type demister is likely to cause a large pressure drop due to a relatively high density of the wire mesh, the flow rate of the gas needs to be controlled within a relatively low range in the case of treating the same flow rate, which results in a particularly large-sized apparatus.
4. Due to the principle of separating liquid drops by the wire mesh demister: after the liquid drops are relatively large in aggregation, the liquid drops fall under the action of gravity to separate gas from liquid, but the gas moves upwards and the liquid drops move downwards to generate convection, so that the separated liquid drops are easily entrained by airflow at a certain flow velocity to cause entrainment, and the separation efficiency and the separation effect are reduced.
Based on the problems, the invention provides a novel vane type demister.
Disclosure of Invention
Aiming at the problem in practical application, the invention aims to provide a novel vane-type demister which has small pressure drop of airflow, small consumption and reliability and practicability, and the specific scheme is as follows:
the utility model provides a novel vane type defroster, includes casing, preseparator and separator, a side of casing is equipped with the air inlet, and the casing top is equipped with the gas outlet, and the air inlet intercommunication preseparator, it is equipped with the separator to lie in the vertical top of preseparator in the casing, preseparator air outlet corresponds separator air inlet, and separator top air outlet corresponds the gas outlet, and separator bottom goes out the liquid end intercommunication and has the condensate discharge pipe, the bottom is equipped with the condensate tank in the casing, the condensate discharge pipe extends to in the condensate tank, and the condensate tank bottom is equipped with the condensate discharge outlet, wherein:
the separator comprises a wire mesh collector and a blade separator, the wire mesh collector is arranged on the outer side of the blade separator, the blade separator comprises a plurality of blades vertically arranged in a shell, the blades form a blade group, a flow channel is formed between every two adjacent blades, and the blades are arranged into a double-pocket structure.
Further, two pocket type structure blades include main blade and a plurality of auxiliary blade, and the both sides equidistance of a main blade is crisscross to be pasted and is equipped with a plurality of auxiliary blade, wherein:
the main blade is mainly formed by sequentially combining a plurality of V-shaped blades into a corrugated plate structure, and each V-shaped blade comprises an inlet part and an outlet part which are in mirror symmetry;
the auxiliary blade mainly comprises a central part and extension parts extending towards two ends of the central part, and the central section and the two extension parts are combined to form an S-shaped structure;
the central part of each auxiliary vane is attached to the outer side wall of the inlet part and/or the inner side wall of the outlet part.
Further, the two extensions of each auxiliary vane are parallel to each other, and the two extensions of each auxiliary vane are parallel to the inlet portion and/or the outlet portion.
Further, the wire mesh collector and the blade separator are provided with four wire mesh collectors and four blade separators at equal intervals around the circumferential direction in the shell.
Furthermore, the blade separator also comprises a blade frame, the blade group is fixed in the blade frame to form a tetrahedral blade assembly, and a sealing welding structure is arranged between the sealing shell and the blade frame.
Furthermore, two liquid level measurement ports are sequentially arranged on the shell along the vertical direction of the shell, and the liquid level measurement ports are used for monitoring the liquid level height in the condensate tank.
Compared with the prior art, the invention has the following beneficial effects:
(1) in the invention, the preseparator, the separator and the condensate tank are arranged in the demister and are matched with each other to work, and in the working process, gas and condensate flow separately, so that the condition that the gas carries the separated condensate to form secondary entrainment is avoided, and the separation efficiency is effectively increased;
(2) the double-pocket composite blade interlayer is adopted in the invention to separate gas and liquid in fluid, and the self structure is used for effectively gathering, collecting and separating fine liquid drops in the airflow and separating the condensate from the gas, so that the defects of a silk screen filtering separator are overcome, and the double-pocket composite blade interlayer has the advantages of high efficiency, reasonable design, simple structure, convenience in cleaning, small size, lower manufacturing cost, no energy consumption, small pressure drop of the airflow, reliability, stability, strong practicability and the like;
(3) the invention designs the structure form of the tetrahedron, increases the effective separation area in the separation container with the same size, and can effectively reduce the investment cost with the same treatment capacity.
Drawings
FIG. 1 is an overall schematic diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the internal vane pack configuration of the vane separator of the present invention;
FIG. 4 is an exploded view of a bucket according to the present invention;
fig. 5 is a schematic structural diagram of a second embodiment of the present invention.
Reference numerals: 1. a housing; 2. a pre-separator; 3. an air inlet; 4. an air outlet; 5. a condensate discharge pipe; 6. a condensate tank; 7. a liquid level measurement port; 8. a wire mesh collector; 9. a vane separator; 10. a blade; 11. a main blade; 12. an inlet section; 13. an outlet portion; 14. an auxiliary blade; 15. a central portion; 16. an extension portion; 17. a condensate discharge outlet.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Example one
As shown in figure 1, a novel vane type demister, comprising a housing 1, a preseparator 2 and a separator, wherein an air inlet 3 is arranged on one side surface of the housing 1, an air outlet 4 is arranged at the top of the housing 1, the air inlet 3 is communicated with the preseparator 2, the preseparator 2 is transversely arranged in the housing 1 along the preseparator, a separator is arranged in the housing 1 and is positioned vertically above the preseparator 2, an air outlet of the preseparator 2 corresponds to an air inlet of the separator, an air outlet at the top of the separator corresponds to the air outlet 4, a liquid outlet end at the bottom of the separator is communicated with a condensate discharge pipe 5, a condensate tank 6 is arranged at the bottom end in the housing 1, the condensate discharge pipe 5 extends into the condensate tank 6, and a condensate.
Specifically, the separator includes a wire concentrator 8 and a blade separator 9, and the wire concentrator 8 is disposed outside the blade separator 9.
When the demister integrally works, fluid enters the preseparator 2 in the shell 1 through the air inlet 3, the direction of the fluid in the demister is changed by the fluid and the preseparator, and the direction of the main fluid is changed to be downward, so that larger liquid drops in the fluid fall to the bottom of the demister under the action of gravity, namely fall into the liquid condensation tank 6, and preseparation is carried out on the fluid; other fluids return upwards under the action of pressure to enter the screen concentrator 8, liquid drops aggregate and grow up under the action of the screen concentrator 8, when the diameter of the liquid drops in the fluids is larger than a certain value, the liquid drops further grow up after entering the blade separator 9, grown particles flow down along the wall of the vessel after being collected by the blade separator 9, finally enter the condensate tank 6 along the condensate discharge pipe 5 for temporary storage, and demisted gas in the fluids rises upwards and is finally discharged from the gas outlet 4.
Two liquid level measurement ports 7 are sequentially arranged on the shell 1 along the vertical direction of the shell, and the liquid level measurement ports 7 are used for monitoring the liquid level height in the condensate tank 6.
In the whole demisting process, gas and condensate flow separately, so that the gas is prevented from carrying the condensate (namely the separated liquid) to form secondary carrying, the separation efficiency is increased, and the enterprise cost is reduced.
It should be noted that the purpose of the screen collector 8 in the present invention is not to separate the gas from the atomized liquid, but to agglomerate the liquid droplets in the gas, for example, the diameter of the liquid droplets entering the screen collector 8 is 3-5 microns, the liquid droplets can be collected to 8-15 microns after passing through the screen collector 8, and when the flow is larger than 8 microns, the liquid droplets enter the vane separator 9 to grow further.
In addition, under the working condition that liquid drops in the fluid are large, namely the liquid drops are larger than 8 microns, the separator can only adopt the vane separator 9 to work, so that the size of the whole demister can be reduced under the condition of achieving the same demisting effect.
In order to improve the overall demisting effect of the wire concentrator 8 and the blade separator 9 in the housing 1, four wire concentrators 8 and four blade separators 9 are arranged equidistantly around the inner circumference of the housing 1, as shown in fig. 2. The vane separator 9 further comprises a vane frame, the vane assembly is fixed in the vane frame to form a tetrahedral vane assembly, and a seal welding structure is arranged between the seal housing 1 and the vane frame. Therefore, after the air flow enters, the air and the liquid drops in the air flow can be separated at any position around, the effective separation area in the separation container with the same size is increased, the demisting effect is good, and the investment cost with the same treatment capacity can be effectively reduced.
In order to ensure the separation effect between gas and liquid in the fluid, the structure of the vane separator 9 provided in the present invention is shown in fig. 3, the vane separator 9 includes a plurality of vanes 10 vertically arranged in the housing 1, the plurality of vanes 10 form a vane group, at least two groups of vanes 10 form a vane group, the number of the vane group is determined according to the flow rate and flow velocity design required by the whole demister, and can be continuously accumulated, a flow channel is formed between adjacent vanes 10, and the vanes 10 are in a double-pocket structure.
The double pocket type vane 10, i.e., the vane 10 is configured as a composite vane sandwich, compared to the conventional single-layer sandwich vane (e.g., the vane mist eliminator disclosed in CN 102716618B), the composite vane sandwich of the present invention can handle higher liquid loads and has relatively higher processing capacity.
Specifically, in one possible embodiment, the double-pocket type structural blade includes a main blade 11 and a plurality of auxiliary blades 14, and the auxiliary blades 14 are attached to two sides of the main blade 11 in an equidistantly staggered manner. The auxiliary blade 14 is welded to the main blade 11 by pressure welding, and different chambers and flow passages are formed by the main blade 11 and the auxiliary blade 14, as shown in fig. 3, and fig. 3 also shows the flow pattern of the fluid inside the blade 10.
Further explanation is as follows: as shown in fig. 4, the main blade 11 is mainly formed by sequentially combining a plurality of V-shaped blades to form a corrugated plate structure, and each V-shaped blade includes an inlet portion 12 and an outlet portion 13 which are mirror images; the auxiliary blade 14 is mainly composed of a central portion 15, extensions 16 extending toward both ends of the central portion 15, and the central section and the two extensions 16 are combined to form an S-shaped structure.
The two extensions 16 on each auxiliary vane 14 are parallel to each other and the two extensions 16 on each auxiliary vane 14 are parallel to the inlet section 12 and/or the outlet section 13.
The central portion 15 of each auxiliary vane 14 abuts the outer side wall of the inlet portion 12 and/or the inner side wall of the outlet portion 13.
That is, the structure of the auxiliary vane 14 welded to the outer side wall of each inlet portion 12 of the main vane 11 will be described as an example: one end extension 16 on the auxiliary vane 14 extends to the outlet portion 13 adjacent to the inlet portion 12 and forms an inner semi-closed passage with the outlet portion 13, and the other end extends to the other outlet portion 13 adjacent to the inlet portion 12 and forms a semi-closed passage as with the outlet portion 13. And one of the extensions 16 of the auxiliary vane 14 is parallel to the inlet portion 12 and the other extension 16 is parallel to the outlet portion 13.
When the fluid flows in the blade group, the direction of the fluid is forcibly changed based on the structure of the blade group, droplet particles in the fluid are condensed and enlarged in continuous collision, the flow speed in the semi-closed chambers at the two sides of the main blade 11 is very slow under the action of gravity, and the droplets flow to the lower condensate tank 6 along the wall surface of the blade 10 after being condensed and collected.
Specifically, the following description is provided: when the gas containing the liquid mist flows through the demister at a certain speed, the gas in the liquid mist state is condensed into large liquid drops in the condenser due to the inertial impact effect of the gas and then discharged, and the liquid mist which is not separated and condensed to grow enters the vane separator 9, and the mist collides with the vanes 10 and is attached to the surfaces of the vanes 10. The dispersion of the mist on the surface of the blade 10 and the gravity settling of the mist enable the mist to form larger liquid drops and move forwards to the turning position of the blade 10 along with the air flow, the liquid drops are larger and larger due to the turning centrifugal force and the friction action and the adsorption action of the turning centrifugal force and the blade 10 and the surface tension of the liquid, and the liquid drops are separated from the liquid discharge channel on the surface of the corrugated plate until the accumulated liquid drops are larger until the gravity generated by the accumulated liquid drops exceeds the resultant force of the rising force of the air and the surface tension of the liquid.
The multi-fold of defroster wave plate has increased the chance that the mist foam is caught to the structure, and the mist foam that is not got rid of is caught the collection through the same effect in next turning, and the repeated action like this to defogging efficiency has been improved greatly. After passing through the corrugated plate blade set, the gas is substantially free of entrainment.
Because the fluid flow channel of the high-efficiency separator is changed only after the blades 10 are bent, unlike a wire mesh demister which forms the separation of condensate through a very dense wire mesh and a certain thickness, and in the process of separating condensate from the wire mesh, the separated liquid drops are easy to carry twice and then return to the wire mesh to flow out together with other liquid drops (especially under the condition of high working load or overload), so that the failure of the wire mesh filtering separator is caused.
Compared with the wire mesh demister separator, the pressure drop of the wire mesh demister is 1-2 times higher than that of the vane type high-efficiency separator with the same function (namely, the energy consumption can be reduced), other quantities can be treated in the same way, the same treatment effect can be achieved, the required effective filtering area can be reduced to 30-50%, and the investment and the occupied area can be reduced.
Example two
The difference between the present embodiment and the first embodiment is characterized in that: the blade assembly is configured as shown in FIG. 5, showing two additional composite blade sandwich style blades 10.
Under different working conditions and different material media, different blade types can be selected, and the composite blade interlayer is also used, so that the liquid load with higher capacity can be treated.
The specific implementation principle of the invention is as follows: in the working process of the demister, gas and condensate flow separately, so that the condition that the gas carries the separated condensate to form secondary entrainment is avoided, and the separation efficiency is effectively increased.
In the invention, the blades 10 are optimally designed according to aerodynamics, the blades 10 effectively capture fine liquid droplets by utilizing the inertia difference between airflow and contained fine liquid droplets, and the streamline-shaped channel formed between the adjacent blades 10 is used as the flow channel of the airflow and is in the flow form shown in fig. 3, thereby completely meeting the flowing characteristic of the airflow, ensuring smooth airflow flowing and small flow resistance, and further ensuring small pressure loss to the airflow.
The novel blade type efficient separator disclosed by the invention is directly dependent on a self structure to effectively gather, capture and collect fine liquid drops in air flow and separate condensate from the air, has the characteristics of high efficiency, reasonable design, simple structure, convenience in cleaning, small size, lower manufacturing cost, no energy consumption, small pressure drop of the air flow, reliability, stability, strong practicability and the like, is beneficial to popularization and application, and is particularly suitable for steam dehydration before a steam turbine.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. The utility model provides a novel vane type defroster, its characterized in that, includes casing (1), preseparator (2) and separator, a side of casing (1) is equipped with air inlet (3), and casing (1) top is equipped with gas outlet (4), and air inlet (3) intercommunication preseparator (2), it is equipped with the separator to lie in the vertical top of preseparator (2) in casing (1), preseparator (2) air current export corresponds separator air current entry, and separator top air current export corresponds gas outlet (4), and separator bottom goes out the liquid end intercommunication and has condensate discharge pipe (5), the bottom end is equipped with condensate tank (6) in casing (1), condensate discharge pipe (5) extend to in condensate tank (6), and condensate tank (6) bottom is equipped with condensate discharge outlet (17), wherein:
the separator comprises a wire mesh collector (8) and a blade separator (9), the wire mesh collector (8) is arranged on the outer side of the blade separator (9), the blade separator (9) comprises a plurality of blades (10) vertically arranged in the shell (1), the blades (10) form a blade group, a flow channel is formed between every two adjacent blades (10), and the blades (10) are arranged into a double-pocket structure.
2. The vane mist eliminator as claimed in claim 1, wherein the vanes of the double-pocket structure comprise a main vane (11) and a plurality of auxiliary vanes (14), the auxiliary vanes (14) are attached to two sides of the main vane (11) in an equidistant and staggered manner, and the two sides of the main vane (11) are provided with the auxiliary vanes (14), wherein:
the main blade (11) is mainly formed by sequentially combining a plurality of V-shaped blades to form a corrugated plate structure, and each V-shaped blade comprises an inlet part (12) and an outlet part (13) which are in mirror symmetry;
the auxiliary blade (14) mainly comprises a central part (15) and extension parts (16) extending towards two ends of the central part (15), and the central section and the two extension parts (16) are combined to form an S-shaped structure;
the central part (15) of each auxiliary blade (14) is attached to the outer side wall of the inlet part (12) and/or the inner side wall of the outlet part (13).
3. The new vane mist eliminator as claimed in claim 2 wherein the two extensions (16) on each auxiliary vane (14) are parallel to each other and the two extensions (16) on each auxiliary vane (14) are parallel to the inlet section (12) and/or the outlet section (13).
4. The vane mist eliminator as claimed in claim 1 wherein the wire collector (8) and vane separator (9) are arranged four equally circumferentially around the housing (1).
5. The vane mist eliminator as claimed in claim 1 wherein the vane separator (9) further comprises a vane frame, the vane assembly is fixed in the vane frame to form a tetrahedral vane assembly, and the casing (1) and the vane frame are welded together.
6. The vane mist eliminator as claimed in claim 1, wherein the casing (1) is provided with two liquid level measuring ports (7) in sequence along the vertical direction, and the liquid level measuring ports (7) are used for monitoring the liquid level in the condensate tank (6).
Priority Applications (1)
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CN202110348531.XA CN112999759A (en) | 2021-03-31 | 2021-03-31 | Novel vane type demister |
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CN202110348531.XA CN112999759A (en) | 2021-03-31 | 2021-03-31 | Novel vane type demister |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2243533A1 (en) * | 2009-04-20 | 2010-10-27 | Balcke-Dürr GmbH | Droplet separator |
CN209049129U (en) * | 2018-10-12 | 2019-07-02 | 上海祁奥环保科技有限公司 | High efficient gas and liquid separator system and its high-efficiency blade separator |
CN209576172U (en) * | 2019-02-19 | 2019-11-05 | 正和集团股份有限公司 | It is a kind of to avoid device of the CONTINUOUS REFORMER circulating hydrogen compressor with liquid |
CN212548666U (en) * | 2020-06-15 | 2021-02-19 | 西安同大科技有限公司 | Mechanical associated gas-liquid condensate separator |
-
2021
- 2021-03-31 CN CN202110348531.XA patent/CN112999759A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2243533A1 (en) * | 2009-04-20 | 2010-10-27 | Balcke-Dürr GmbH | Droplet separator |
CN209049129U (en) * | 2018-10-12 | 2019-07-02 | 上海祁奥环保科技有限公司 | High efficient gas and liquid separator system and its high-efficiency blade separator |
CN209576172U (en) * | 2019-02-19 | 2019-11-05 | 正和集团股份有限公司 | It is a kind of to avoid device of the CONTINUOUS REFORMER circulating hydrogen compressor with liquid |
CN212548666U (en) * | 2020-06-15 | 2021-02-19 | 西安同大科技有限公司 | Mechanical associated gas-liquid condensate separator |
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