CN108593318B - Fluidization demister performance detection device - Google Patents
Fluidization demister performance detection device Download PDFInfo
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- CN108593318B CN108593318B CN201810180035.6A CN201810180035A CN108593318B CN 108593318 B CN108593318 B CN 108593318B CN 201810180035 A CN201810180035 A CN 201810180035A CN 108593318 B CN108593318 B CN 108593318B
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- 238000005243 fluidization Methods 0.000 title claims abstract description 82
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000003595 mist Substances 0.000 claims abstract description 13
- 239000007921 spray Substances 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 11
- 239000008188 pellet Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 claims 3
- 238000013461 design Methods 0.000 abstract description 3
- 230000001174 ascending effect Effects 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention provides a fluidized mist eliminator performance detection device. The demister experimental device comprises a fluidization demister, a fan, a water pump, demisting media, a water tank, a nozzle, a rotameter, a frequency converter and an air inlet pipeline. The fluidization demister shell adopts a design that an upper end opening is larger than a lower end opening, and a sieve plate is arranged at the lower end; mist drops sprayed out of an air flow entrainment nozzle of the fan enter a demisting medium through the sieve plate, the demisting medium is in a stable fluidization state under the action of ascending air flow, meanwhile, the ascending air flow encounters the demisting medium in the fluidization state, under the actions of inertia, baffling and the like, the air flow direction is deviated, the drops carried in the air flow are continuously adsorbed, condensed and intercepted by the surface of the demisting medium, and purified air after demisting is discharged from an air flow channel at the top of the demister, so that fluidization demisting is completed. The device has the advantages of conveniently and accurately detecting the fluidization speed, the running resistance, the demisting efficiency and the like of the fluidization demister, and providing a basis for equipment enlargement.
Description
Technical Field
The invention belongs to the technical field of demisting, and particularly relates to a fluidized demister performance detection device.
Background
Demisters are key equipment in many industrial production systems in the fields of chemical industry and environmental protection, and the performance of the demisters directly influences whether other production systems can continuously and reliably operate. The main types of the existing demisters include baffle demisters, cyclone plate separators, cyclone demisters, wire mesh demisters, electrostatic demisters, fiber demisters and the like.
Although the baffle plate demister has lower running resistance, the demisting effect is difficult to meet the requirement; the cyclone plate separator or the cyclone demister has higher demisting efficiency, large treatment capacity and large running resistance; the silk screen demister and the fiber demister are high in demisting efficiency, but are easy to block and short in service life; although the electrostatic demister has good demisting effect, the investment and operation cost are high.
The design of the demister is required to have high demisting efficiency, low resistance, good corrosion resistance, convenient cleaning and maintenance, anti-blocking, low energy consumption and the like, and the fluidized demister is excellent in performance and has the advantages of high demisting efficiency, low running resistance, excellent corrosion resistance, low cost, anti-blocking, low energy consumption, convenient maintenance and the like.
Currently, there is no device for detecting the performance of a fluidized mist eliminator (mainly comprising the fluidization speed, the running resistance, the mist eliminating efficiency and the like of the fluidized mist eliminator). Therefore, the device for detecting the performance of the fluidization demister is necessary, is used for detecting the performance and the operation parameters of the fluidization demister in a laboratory, and provides a basis for equipment enlargement.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a fluidization demister performance detection device which has the functions of detecting fluidization speed, demisting efficiency, running resistance and the like.
The aim of the invention is achieved by the following technical scheme:
a fluidized demister performance detection device comprises a demisting detection loop formed by serially connecting a rotameter, a water pump and a water tank between a spray outlet of an air inlet pipeline and a water outlet through pipelines; the exhaust port at the upper end of the air inlet pipeline is communicated to the fluidization demister; a fan is communicated to the side surface of the lower part of the air inlet pipeline; the upper end of the fluidization demister is also provided with an exhaust pipeline, the side walls of the exhaust pipeline and the air inlet pipeline are respectively provided with a detection hole for detecting the fluidization speed or the resistance or the demisting efficiency of the fluidization demister, a nozzle penetrates into the center of the air inlet pipeline through a spray opening arranged on the side wall of the air inlet pipeline, and the nozzle sprays upwards and is used for simulating the fog-containing gas with different humidity by the air flow discharged by the humidifying fan; the fluidization demister comprises a section of reducing pipeline with a large upper part and a small lower part, a sieve plate arranged at the inner bottom of the reducing pipeline, a demisting cavity formed by enclosing the sieve plate and the reducing pipeline, and demisting medium arranged in the demisting cavity.
Preferably, a partition plate is arranged in the middle of the water tank, the water tank is divided into a spray water cavity and a collecting water cavity, the spray water cavity is communicated to the water pump and used for containing spray water quantity, and the collecting water cavity is communicated to a water outlet of the air inlet pipeline and used for containing collected fog liquid.
Optionally, the nozzle adopts a movable nozzle for adjusting the spray cone angle, the spray flow and the distance between the nozzle and the demisting cavity, so that the fog drops sprayed out of the nozzle completely enter the demisting cavity and are not attached to the inner wall of the air inlet pipeline.
From the above, the spray nozzle adopts a spray cone angle of 30-110 degrees, and the spray flow is 8-80L/h.
Preferably, the upper end area of the reducing pipeline is 1.1-8 times of the lower end area, and the cross section of the reducing pipeline is gradually and continuously enlarged from bottom to top.
Preferably, the demisting medium is a spherical porous medium, including solid pellets and hollow pellets, and is a mixture of different specific gravities, different porosities and different materials.
Compared with the prior art, the invention has the following advantages:
the air current that carries atomizing liquid gets into the fluidization defroster by the sieve, under the effect of air current, the defogging medium upward movement reaches the certain altitude back, because fluidization defroster adopts the big lower extreme opening of upper end special design, defroster below air current speed is greater than the fluidization velocity of defogging medium and blows the defogging medium up, and top cross-section area constantly increases, the top air current speed constantly reduces until being less than the fluidization velocity of defogging medium, make spherical porous medium not enough upward movement, then to marginal and below motion, and fluidization defroster limit wall's inclination angle makes the spherical porous medium of marginal follow fluidization defroster limit wall downward movement and fills the porous medium that is blown up by the air current under the effect of gravity, then cyclic reciprocation forms stable fluidization form, the problem that the defroster is blockked up well, the operating resistance is big has improved the stability and the defogging efficiency of device greatly.
The fluidization velocity refers to the velocity of the medium at which the medium moves upward against its own weight in a fluidized state, and is referred to as the fluidization velocity. The fluidization state means that the medium enters the container at a certain speed to provide a certain wind pressure at the bottom of the container, the partial pressure of the medium is greater than or equal to the weight of the medium on a unit section, the medium moves in a suspension state and cannot be taken away by fluid, and the upper part of the medium is required to be provided with a horizontal interface.
The spherical porous medium is used as the demisting medium, but is not limited to porous medium materials, comprises porous media with different specific gravities and different porosities, comprises solid pellets and hollow pellets capable of being fluidized, and can be provided with different demisting media according to actual needs.
The airflow carrying the atomized liquid contacts and collides with the demisting medium, so that the atomized liquid is adsorbed and condensed on the surface of the demisting medium, purified demisting gas is obtained, the atomized liquid downwards forms stable laminar flow along the side wall of the reducing pipeline and is converged to the water tank under the action of gravity, and the wind speed of the part with the larger cross-sectional area of the reducing pipeline is smaller because of the bigger top and the smaller bottom of the reducing pipeline, so that the droplets enriched on the surface of the demisting medium are converged downwards along the side wall of the trumpet-shaped reducing pipeline.
The nozzle adopts the movable nozzle for adjust spray cone angle, spray flow and the distance of nozzle apart from defogging chamber, make the whole defogging chamber that gets into of nozzle spun fog droplet, can be according to spray cone angle and flow pressure size, height-adjusting is used for making the complete atomizing of nozzle blowout liquid, and make the whole defogging chamber that gets into of fog droplet, and not adhere to on the air inlet pipeline inner wall, thereby improve defogging efficiency and detect the accuracy.
The side walls of the exhaust pipeline and the air inlet pipeline are respectively provided with a detection hole, and the detection holes can be connected with an anemometer, a pressure gauge or a liquid drop sampling device for detecting the fluidization speed or the resistance or the demisting efficiency of the fluidization demister.
The demisting efficiency of the fluidization demister can be obtained by detecting the mass concentration of fog drops at the inlet and the outlet of the fluidization demister; through the detection holes arranged in front of and behind the fluidization demister, the running resistance of the fluidization demister can be detected by using a pressure gauge; through the detection hole at the air inlet pipeline, the fluidization speed and the actual running speed of different defogging mediums or different thicknesses can be detected by using an anemometer.
The invention has the advantages of convenient and accurate detection of the performance of the fluidization demister, can be used for detecting the performance and the operation parameters of the fluidization demister in a laboratory, and provides basis for equipment enlargement and practical application.
Drawings
FIG. 1 is a schematic diagram of a fluidized mist eliminator performance detection device provided by the invention,
fig. 2 is a schematic cross-sectional view of a fluidized demister performance detection apparatus according to embodiment 1 of the present invention, when a single-layer sieve plate is disposed in the fluidized demister, the fluidized demister is in a fluidized state.
The specific embodiment is as follows:
the invention will be described in further detail with reference to the drawings and the detailed description.
Embodiment 1 as shown in fig. 1 and 2, the device for detecting the performance of the fluidization demister comprises a demisting detection loop formed by connecting a rotameter 6, a water pump 9 and a water tank 10 in series between a spray outlet 5 and a water outlet 11 of an air inlet pipeline 12; the upper end of the air inlet pipeline is communicated with the fluidization demister 3; a fan 7 is communicated to the side surface of the lower part of the air inlet pipeline; the upper end of the fluidization demister is also provided with an exhaust pipeline 1, and the side walls of the exhaust pipeline 1 and the air inlet pipeline 12 are respectively provided with a detection hole 14, and the detection holes can be connected with an anemometer, a pressure gauge or a liquid drop sampling device for detecting fluidization speed, running resistance or demisting efficiency; the nozzle 4 penetrates into the center of the air inlet pipeline 12 through a spray opening 5 arranged on the side wall of the air inlet pipeline 12, and the nozzle 4 sprays upwards; the air inlet pipeline is fixed on the support, and the fluidization demister comprises a section of reducing pipeline 30 with a large upper part and a small lower part, a sieve plate 15 arranged in the reducing pipeline, a demisting cavity 16 formed by enclosing the sieve plate and the reducing pipeline and a demisting medium 17 arranged in the demisting cavity. The middle of the water tank 10 is provided with a partition plate 101 which divides the water tank into a spray water cavity 102 and a collecting water cavity 103, wherein the spray water cavity is communicated with a water pump and is used for containing spray water, the collecting water cavity is communicated with a water outlet of an air inlet pipeline and is used for containing mist collected by fluidization defogging. The fan 7 can adjust the air quantity through the frequency converter 8.
The nozzle 4 adopts a movable nozzle, and the height can be adjusted up and down according to the spray cone angle and the flow pressure. The spray cone angle of the spray nozzle 4 is 30-110 degrees, and the spray flow is 8-80L/h. The air flow used for humidifying the air flow exhausted by the fan simulates the fog-containing air with different humidity.
The upper end area of the reducing pipeline is 1.1-8 times of the lower end area, the cross section of the reducing pipeline is gradually and continuously enlarged from bottom to top, and the shape of the reducing pipeline is not limited to a round table, and the reducing pipeline comprises various polygonal prismatic tables.
The defogging medium is spherical porous medium, the diameter is 20mm, adopts corrosion-resistant material, and the defogging medium is not limited to porous medium material, includes porous medium material of different proportion, different materials, different porosities, and contains solid globules and hollow globules that can fluidize, can set up different defogging media according to actual need.
The screen plate 15 is a wire mesh, an open pore plate or other structures with good isolation and ventilation effects.
The diameter of the detection hole 14 is 40mm.
The diameter of the air inlet pipeline 12 is 100mm, and the height is 700mm.
The detection method of the fluidization demister performance detection device comprises the following steps:
the method comprises the following steps:
s01, blowing air into the fluidization demister from the upper end of an air inlet pipeline through a fan, and simultaneously opening a nozzle to enable demisting media to move to form demisting media in a fluidization form, detecting fluidization speed, and determining the actual running speed of the fluidization demister according to the fluidization speed;
s02, detecting the mass of liquid drops entering the fluidization demister and the gas flow in a certain time, calculating the mass concentration of the liquid drops flowing out of the inlet of the fluidization demister, then collecting the mass of the liquid drops flowing out of the outlet of the fluidization demister in the same time by using a filter membrane sampling device, and calculating the mass concentration of the liquid drops at the outlet;
s03, monitoring the pressure difference of the gas before and after the fluidized demister in the step S01;
s04, obtaining the demisting efficiency of the fluidization demister under the condition of the front-back gas pressure difference of the fluidization demister in the step S03.
Embodiment 2 As shown in FIGS. 1 and 2, the device for detecting the performance of the fluidization demister comprises a demisting detection loop formed by connecting a rotameter 6, a water pump 9 and a water tank 10 in series between a spray outlet 5 and a water outlet 11 of an air inlet pipeline 12; the upper end of the air inlet pipeline is communicated with the fluidization demister 3; a fan 7 is communicated to the side surface of the lower part of the air inlet pipeline; the upper end of the fluidization demister is also provided with an exhaust pipeline 1, the side walls of the exhaust pipeline 1 and the air inlet pipeline 12 are respectively provided with a detection hole 14, the detection holes can be connected with an anemometer, a pressure gauge or a liquid drop sampling device for detecting the fluidization speed or the resistance or the demisting efficiency of the fluidization demister, a nozzle 4 penetrates into the center of the air inlet pipeline 12 through a spray opening 5 arranged on the side wall of the air inlet pipeline 12, and the nozzle 4 sprays upwards; the air inlet pipeline is fixed on the support, and the fluidization demister comprises a section of reducing pipeline 30 with a large upper part and a small lower part, a sieve plate 15 arranged at the inner bottom of the reducing pipeline, a demisting cavity 16 formed by enclosing the sieve plate and the reducing pipeline, and a demisting medium 17 arranged in the demisting cavity. The middle of the water tank 10 is provided with a partition plate 101 which divides the water tank into a spray water cavity 102 and a collecting water cavity 103, wherein the spray water cavity is communicated with a water pump and is used for containing spray water, the collecting water cavity is communicated with a water outlet of an air inlet pipeline and is used for containing mist collected by fluidization defogging. The fan 7 can adjust the air quantity through the frequency converter 8.
The nozzle 4 adopts a movable nozzle, and the height can be adjusted up and down according to the spray cone angle and the flow pressure. The spray cone angle of the spray nozzle 4 is 30-110 degrees, and the spray flow is 8-80L/h. The air flow used for humidifying the air flow exhausted by the fan simulates the fog-containing air with different humidity.
The cross section of the upper end of the reducing pipeline is 4 times of that of the lower end, the cross section of the reducing pipeline is gradually and continuously enlarged from bottom to top, and the shape of the reducing pipeline is not limited to a round table and comprises various polygonal prismatic tables.
The defogging medium is spherical porous medium, the diameter is 40mm, adopts acid corrosion resistant material, and the defogging medium is not limited to porous medium material, includes porous medium material of different proportion, different materials, different porosities, and contains solid globules and hollow globules that can fluidize, can set up different defogging media according to actual need.
The screen plate 15 is a wire mesh, an open pore plate or other structures with good isolation and ventilation effects.
The opening 14 is 40mm in diameter.
The diameter of the air inlet pipeline 12 is 150mm, and the height is 900mm.
The detection method of the fluidization demister performance detection device comprises the following steps:
the method comprises the following steps:
s01, blowing air into the fluidization demister from the upper end of an air inlet pipeline through a fan, and simultaneously opening a nozzle to enable demisting media to move to form demisting media in a fluidization form, detecting fluidization speed, and determining the actual running speed of the fluidization demister according to the fluidization speed;
s02, detecting the mass of liquid drops entering the fluidization demister and the gas flow in a certain time, calculating the mass concentration of the liquid drops flowing out of the inlet of the fluidization demister, then collecting the mass of the liquid drops flowing out of the outlet of the fluidization demister in the same time by using a filter membrane sampling device, and calculating the mass concentration of the liquid drops at the outlet;
s03, monitoring the pressure difference of the gas before and after the fluidized demister in the step S01;
s04, obtaining the demisting efficiency of the fluidization demister under the condition of the front-back gas pressure difference of the fluidization demister in the step S03.
As described above, the device has the characteristics of conveniently and accurately detecting the performance of the fluidization demister (mainly comprising the fluidization speed, the running resistance, the demisting efficiency and the like of the fluidization demister), can be used for detecting the performance and the running parameters of the fluidization demister in a laboratory, and provides a basis for equipment enlargement.
The embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the invention should be made and equivalents should be construed as falling within the scope of the invention.
Claims (4)
1. A fluidized demister experimental device comprises a demisting detection loop formed by connecting a rotameter (6), a water pump (9) and a water tank (10) in series through pipelines among an air inlet pipeline (12), a movable spray opening (5) and a water outlet (11); an exhaust port at the upper end of the air inlet pipeline is communicated with the fluidization demister (3); a fan (7) is communicated to the side surface of the lower part of the air inlet pipeline, and is characterized in that the upper end of the fluidization demister is also provided with an exhaust pipeline (1), the side walls of the exhaust pipeline (1) and the air inlet pipeline (12) are respectively provided with a detection hole (14) for detecting the fluidization speed or the resistance or the demisting efficiency of the fluidization demister, a nozzle (4) penetrates into the center of the air inlet pipeline (12) through a spray opening (5) arranged on the side wall of the air inlet pipeline (12), and the nozzle (4) sprays upwards; the fluidization demister comprises a section of reducing pipeline (30) with a large upper part and a small lower part, a sieve plate (15) arranged at the inner bottom of the reducing pipeline, a demisting cavity (16) formed by enclosing the sieve plate and the reducing pipeline, and demisting medium (17) arranged in the demisting cavity; a partition board (101) is arranged in the middle of the water tank (10), the water tank is divided into a spray water cavity (102) and a collecting water cavity (103), the spray water cavity is communicated to a water pump and is used for metering residual water quantity or atomized water quantity, and the collecting water cavity is communicated to a water outlet of an air inlet pipeline and is used for metering recovered fog; the nozzle (4) adopts a movable nozzle and is used for adjusting the spray cone angle, the spray flow and the distance between the nozzle and the defogging cavity, so that fog drops sprayed out of the nozzle are all introduced into the defogging cavity.
2. The fluidized mist eliminator experiment device according to claim 1, characterized in that the spray nozzle (4) adopts a spray cone angle of 30 ° to 110 °, and a spray flow rate of 8L/h to 80L/h.
3. The fluidized mist eliminator experiment apparatus according to claim 1, wherein the upper end area of the reducing pipe is 1.1 to 8 times the lower end area, and the cross section of the reducing pipe is gradually and continuously enlarged from bottom to top.
4. The fluidized mist eliminator experiment device according to claim 1, wherein the mist eliminator medium is a spherical porous medium, including solid pellets and hollow pellets, and the mist eliminator medium is a mixture of different specific gravities, different porosities and different materials.
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| CN201810180035.6A CN108593318B (en) | 2018-03-05 | 2018-03-05 | Fluidization demister performance detection device |
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| CN108593318B true CN108593318B (en) | 2024-04-12 |
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