CN112774320B - Secondary carrying prevention cyclone plate dust and mist removal device and method - Google Patents
Secondary carrying prevention cyclone plate dust and mist removal device and method Download PDFInfo
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- CN112774320B CN112774320B CN202110167718.XA CN202110167718A CN112774320B CN 112774320 B CN112774320 B CN 112774320B CN 202110167718 A CN202110167718 A CN 202110167718A CN 112774320 B CN112774320 B CN 112774320B
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- 239000000428 dust Substances 0.000 title claims abstract description 64
- 239000003595 mist Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000002265 prevention Effects 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 110
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000003546 flue gas Substances 0.000 claims abstract description 62
- 238000011010 flushing procedure Methods 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims description 36
- 239000002245 particle Substances 0.000 claims description 33
- 239000000779 smoke Substances 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 12
- 230000005484 gravity Effects 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 238000004401 flow injection analysis Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000009736 wetting Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- B01D45/10—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators which are wetted
-
- 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
- B01D45/18—Cleaning-out devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Particles Using Liquids (AREA)
- Treating Waste Gases (AREA)
- Cyclones (AREA)
Abstract
The invention discloses a dust and mist removing device and method for a cyclone plate capable of preventing secondary carrying. The device is sequentially sleeved with an outer cylinder, a screen cylinder and a central cylinder from outside to inside at intervals, a flushing water pipe is arranged in the central cylinder, and a flushing nozzle mechanism is arranged at the upper part of the flushing water pipe; a water collecting tank is formed between the lower part of the screen cylinder body and the outer cylinder body; the lower part of the water collecting tank is provided with an automatic drain pipe valve. The flue gas enters from the bottom of the device, is centrifugally separated through a multi-stage cyclone plate and is dedusted through a liquid film, and is discharged from the top of the device; the flushing water is distributed to each point array arrangement nozzle through the central cylinder body, so that the dual functions of flushing and film forming are realized on the surface of the cyclone plate; the dust-containing wastewater in the flue gas enters a water collecting tank through a screen cylinder body through centrifugal separation and is discharged by an automatic discharging drain pipe valve. The device film forming performance is good, and dust removal defogging is efficient, and the screen cloth can prevent effectively that the flue gas from carrying secondarily, has fundamentally solved conventional defroster inefficiency, easy jam and secondary carry serious scheduling problem.
Description
Technical Field
The invention relates to a smoke treatment device and a chimney rotational flow demisting, dedusting and separating process, in particular to a rotational flow plate dedusting and demisting device and method for preventing secondary carrying.
Background
In recent years, with the rapid development of industry, atmospheric environmental pollution is increasing, wherein SO 2 And fine particulate matter is the primary air pollutant produced by the combustion of coal.
For each coal industry enterprise, in order to implement environmental protection policy, flue gas desulfurization devices are widely adopted. It is counted that 90% of thermal power units all adopt limestone-gypsum wet desulfurization. The desulfurized flue gas can contain a large amount of dust particles and slurry fog drops with different particle sizes, and if the flue gas is directly discharged into the atmosphere, gypsum rain phenomenon can be generated in the surrounding area, so that secondary pollution is caused. Therefore, each coal industry enterprise can further treat the desulfurized flue gas, and large-scale devices such as wet electric dust removal or tube bundle demisters are generally adopted.
The wet electric dust collector has the problems of high initial investment, large occupied area, large resistance, high electricity consumption and the like. The conventional tube bundle demister has the defects that the flow velocity distribution of a flue gas inlet is uneven, the flow velocity of the flue gas is overlarge, the demister is easy to produce liquid drops, the secondary carrying phenomenon is serious, flushing water is overlarge, water inlet and outlet of a desulfurizing tower or a washing tower are difficult to balance, flushing water is forced to be reduced, the demisting and blocking are caused, and the dedusting efficiency is low.
At present, a plurality of patent technologies related to tube bundle type rotational flow demisting and dedusting exist, but the problems of low demisting and dedusting efficiency, easy blockage, large flushing water requirement and serious secondary carrying of flue gas generally exist in practical application, and the demisting and dedusting efficiency is reduced. Despite the substantial improvements made in the devices of the latter patents, the problem of secondary carrying is still not solved.
For example, chinese patent application publication No. CN106582121a discloses a tube bundle dust and mist removing device with liquid collection. The device defogging unit barrel is equipped with the liquid ring in the annular region between cylindrical urceolus. Although the liquid holding ring has certain effect on blocking the liquid film on the wall surface of the cylinder body, water mist mixed in smoke can not be blocked because of carrying for the second time, and the liquid holding ring is not provided with drainage and discharge, so that serious water balance problem and carrying problem for the second time are caused, flushing water can not be normally put into operation, a long-term stable liquid film can not be formed on the surface of the cyclone blade, dust in smoke is directly caused to be adhered to the cyclone blade, the cyclone blade is blocked, and dust removal efficiency is reduced.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provide a dust and mist removing device and method for a cyclone plate capable of preventing secondary carrying.
According to the invention, the smoke flow area is separated from the liquid film on the outer barrel wall through the screen barrel body to form two different areas, so that the high-speed smoke is thoroughly prevented from flowing through the secondary carrying formed by tearing the liquid film, and the problem of secondary carrying is fundamentally solved; by the flushing nozzle mechanism, a continuous and stable liquid film is formed on the surface of the cyclone plate, so that the problems of poor film forming, low dust removal efficiency and scaling and blocking of smoke dust particles adhered to the surface of the cyclone plate in actual engineering application are solved; accumulated water is collected through the water collecting tank, water is automatically drained, and the water balance problem is thoroughly solved.
The invention is realized by the following technical scheme:
the utility model provides a whirl board dust removal defogging device that prevents carrying secondarily, includes from outside to inside, outer barrel 1, screen cloth barrel 2 and the central barrel 3 that the spacer sleeve was established in proper order;
the middle and lower peripheral wall of the screen cylinder body 2 is a hole-free section 21, and the middle and upper peripheral wall is a sieve pore section;
in the sieve pore section, a plurality of stages of cyclone plates 4 are arranged at intervals from top to bottom; except the last stage of cyclone plates 4, flushing nozzle mechanisms are arranged above the rest stages of cyclone plates 4; the flushing nozzle mechanism is connected with an external water source through a flushing water pipe 5;
the swirl plate 4 is sleeved outside the central cylinder 3; the outer edge of the swirl plate 4 is jointed with the inner surface of the screen cylinder 2;
the bottom of the screen cylinder body 2 and the bottom of the non-porous section 21 are sealed, and a cavity between the non-porous section 21 and the outer cylinder body 1 forms a water collecting tank 7;
the spray water of the flushing nozzle mechanism wets the blades of the cyclone plate 4 and forms a liquid film on the surfaces of the blades;
the flue gas enters from the lower part of the cyclone plate dust removal and defogging device and flows through the multi-stage cyclone plate 4, the flue gas forms a cyclone space under the flow guiding and cyclone action of the cyclone plate 4, and dust particles in the flue gas collide with a liquid film on the cyclone plate 4 and fog drops in the cyclone space and are condensed; solid particles condensed with water pass through the sieve pore sections of the screen cylinder body 2 under the action of centrifugal force and enter a smoke dead zone formed between the screen cylinder body 2 and the outer cylinder body 1;
the flue gas with fog drops continuously flows upwards, under the flow guiding and rotational flow actions of the rotational flow plate 4 at the last stage, the fog drops in the flue gas enter the flue gas dead zone again through the screen cylinder 2 due to the centrifugal force action, the flue gas is adsorbed on the inner wall of the outer cylinder 1 to form a water film, and the flue gas from which dust particles and fog drops are removed flows out from the top of the screen cylinder 2, so that the separation of the flue gas from dust and fog drops is completed;
at the same time, dust particles and mist droplets adsorbed in the liquid film on the inner wall of the outer cylinder 1 fall down into the water collection tank 7 by the action of gravity, are collected by the water collection tank 7, and are discharged.
The flushing nozzle mechanism comprises a plurality of flushing nozzles 6 which spray downwards; the plurality of flushing nozzles 6 are distributed above the cyclone plate 4 in a staggered manner in a lattice mode through pipe joints positioned in the central cylinder body 3 to form dead-angle-free spraying; the external water source is supplied to the flushing nozzle 6 through the flushing pipe 5 and the pipe joint.
The flushing nozzle mechanism can also be of another structure, comprising a T-shaped three-way framework consisting of a transverse pipe 61 and a vertical pipe 62;
the vertical pipe 62 is movably connected with the pipe joint in the central cylinder 3 in a clearance and rotation mode; the nozzles 63 are respectively installed at two ends of the transverse pipe 61 in a mode of opposite water flow injection directions, and the vertical pipe 62 rotates along the axis of the pipe joint under the pushing action of forward and reverse water flow injection, so that the nozzles 63 automatically rotate and spray and wash in multiple directions.
The water leaked from the gap between the vertical pipe 62 and the pipe joint also has a wetting effect on the cyclone plate 4.
The outer cylinder 1 is sealed with the upper edge of the screen cylinder 2.
The outer cylinder body 1, the screen cylinder body 2 and the central cylinder body 3 are of an integrated structure or correspond to each stage of cyclone plate 4 to form a multi-section detachable splicing assembly structure.
An automatic drain pipe valve 8 is arranged at the bottom of the water collecting tank 7.
And an electromagnetic valve is arranged on the pipeline of the flushing water pipe 5, and the electromagnetic valve can be controlled by a computer.
A dust and mist removing method for preventing secondary carrying comprises the following steps:
the flue gas enters from the lower part of the cyclone plate dust removal and defogging device and flows through the multi-stage cyclone plate 4, the flue gas forms a cyclone space under the flow guiding and cyclone action of the cyclone plate 4, and dust particles in the flue gas collide with a liquid film on the cyclone plate 4 and fog drops in the cyclone space and are condensed; solid particles condensed with water pass through the sieve pore sections of the screen cylinder body 2 under the action of centrifugal force and enter a smoke dead zone formed between the screen cylinder body 2 and the outer cylinder body 1;
the flue gas with fog drops continuously flows upwards, under the flow guiding and rotational flow actions of the rotational flow plate 4 at the last stage, the fog drops in the flue gas enter the flue gas dead zone again through the screen cylinder 2 due to the centrifugal force action, the flue gas is adsorbed on the inner wall of the outer cylinder 1 to form a water film, and the flue gas from which dust particles and fog drops are removed flows out from the top of the screen cylinder 2, so that the separation of the flue gas from dust and fog drops is completed;
at the same time, dust particles and mist droplets adsorbed in the liquid film on the inner wall of the outer cylinder 1 fall down into the water collection tank 7 by the action of gravity, are collected by the water collection tank 7, and are discharged.
Compared with the prior art, the invention has the following advantages and effects:
1. the screen barrel body can thoroughly separate the smoke flowing area from the liquid film adsorption area, so that the problem of secondary carrying is solved. The liquid film adsorption zone can not flow between the screen cylinder body and the outer cylinder body due to the water sealing effect of the water collecting tank at the lower part, so that the secondary carrying problem of the flue gas is fundamentally solved, and the demisting and dedusting efficiency is improved.
2. The rinse nozzle mechanism has two embodiments;
the first type is a plurality of downward flushing nozzles, can form on the whirl board surface and last even liquid film, and when fine dust particle impacted the whirl board, liquid film by the whirl board surface that can be fine was adsorbed, again through screen cloth barrel row income water catch bowl, avoided the scale deposit to block up the problem, improved whirl board dust collection efficiency simultaneously.
The second kind of washing nozzle can autogiration, carries out the omnidirectional and washes to there is the liquid that the joint gap spilled in central barrel periphery department, can form on the whirl board surface and last even liquid film, and when fine dust granule impacted the whirl board, liquid film absorption by the whirl board surface that can be fine was discharged into the water catch bowl through the screen cloth barrel again, has avoided the scale deposit to block up the problem, has improved whirl board dust removal efficiency simultaneously.
When the water pressure is high, a part of the water leaks from the gap between the vertical pipe 62 and the pipe joint; the transverse pipe 61 and the vertical pipe 62 form a T shape, so that the gravity and the water pressure of the T-shaped pipe form self-balance, and constant-pressure water spray is maintained;
the automatic rotary omnibearing flushing nozzle can spray in omnibearing mode through automatic rotation of the nozzle, and can realize uniform water spraying under the condition of smaller water spraying quantity so as to achieve the aim of saving water.
3. The dust particles adsorbed on the water film fall to the water collecting tank under the action of gravity, when the water level pressure head of the water collecting tank increases to the upper limit value, the automatic drain valve is automatically opened under the action of pressure, and the liquid in the water collecting tank is automatically discharged with the dust particles; when the water level of the water collecting tank gradually decreases to the lower limit value, the outer drain pipe valve is automatically closed. The automatic drain valve has the function of automatically discharging dust particles and accumulated liquid, and the liquid level in the water collecting tank is always maintained at a certain height to form a water seal, so that the escape of smoke is prevented. Due to the arrangement of the automatic water collecting tank discharging device, even under the condition that flushing water is continuously put into operation, the problem of water diffusion of the desulfurizing tower or the washing tower can be avoided, and water balance in the tower is skillfully realized.
Drawings
Fig. 1 is a schematic diagram of a dust and mist removing device with a cyclone plate for preventing secondary carrying.
FIG. 2 is a schematic diagram II of a dust and mist removing device of a cyclone plate for preventing secondary carrying; the other structure of the flushing nozzle mechanism is mainly shown in the figure, and the other structure is the same as that of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Examples
As shown in fig. 1. The invention discloses a dust and mist removing device of a cyclone plate for preventing secondary carrying, which comprises an outer cylinder body 1, a screen cylinder body 2 and a central cylinder body 3 which are sleeved in sequence at intervals from outside to inside;
a smoke dead zone where smoke cannot flow is formed between the screen cylinder body 2 and the outer cylinder body 1, so that flowing smoke is isolated from a liquid film on the inner wall surface of the outer cylinder body 1, and the problem of secondary carrying is fundamentally solved.
The middle and lower peripheral wall of the screen cylinder body 2 is a hole-free section 21, and the middle and upper peripheral wall is a sieve pore section;
in the sieve pore section, a plurality of stages of cyclone plates 4 are arranged at intervals from top to bottom; except the last stage of cyclone plates 4, flushing nozzle mechanisms are arranged above the rest stages of cyclone plates 4; the flushing nozzle mechanism is connected with an external water source through a flushing water pipe 5. The liquid film is stabilized on the cyclone plate 4, the liquid drops with dust are separated from the flue gas by the centrifugal force generated by the cyclone, and dust particles are adsorbed in the liquid film on the surface of the cyclone plate, so that the dust removal efficiency is greatly improved. The rinse nozzle mechanism may be turned on periodically or continuously or intermittently depending on the particular application.
The swirl plate 4 is sleeved outside the central cylinder 3; the outer edge of the swirl plate 4 is jointed with the inner surface of the screen cylinder 2;
the bottom of the screen cylinder body 2 and the bottom of the non-porous section 21 are sealed, and a cavity between the non-porous section 21 and the outer cylinder body 1 forms a water collecting tank 7;
the spray water of the flushing nozzle mechanism wets the blades of the cyclone plate 4 and forms a liquid film on the surfaces of the blades;
the flue gas enters from the lower part of the cyclone plate dust removal and defogging device and flows through the multi-stage cyclone plate 4, the flue gas forms a cyclone space under the flow guiding and cyclone action of the cyclone plate 4, and dust particles in the flue gas collide with a liquid film on the cyclone plate 4 and fog drops in the cyclone space and are condensed; solid particles condensed with water pass through the sieve pore sections of the screen cylinder body 2 under the action of centrifugal force and enter a flue gas dead zone formed by (gaps between) the screen cylinder body 2 and the outer cylinder body 1;
the flue gas with fog drops continuously flows upwards, under the flow guiding and rotational flow actions of the rotational flow plate 4 at the last stage, the fog drops in the flue gas enter the flue gas dead zone again through the screen cylinder 2 due to the centrifugal force action, the flue gas is adsorbed on the inner wall of the outer cylinder 1 to form a water film, and the flue gas from which dust particles and fog drops are removed flows out from the top of the screen cylinder 2, so that the separation of the flue gas from dust and fog drops is completed;
at the same time, dust particles and mist droplets adsorbed in the liquid film on the inner wall of the outer cylinder 1 fall down into the water collection tank 7 by the action of gravity, are collected by the water collection tank 7, and are discharged.
The flushing nozzle mechanism comprises a plurality of flushing nozzles 6 which spray downwards; the plurality of flushing nozzles 6 are distributed above the cyclone plate 4 in a staggered manner in a lattice mode through pipe joints positioned in the central cylinder body 3 to form dead-angle-free spraying; the external water source is supplied to the flushing nozzle 6 through the flushing pipe 5 and the pipe joint.
The plurality of downward spraying flushing nozzles 6 form a continuous and stable liquid film on the surface of the cyclone plate 4, so that the problems of poor film forming, low dust removal efficiency and scaling and blocking of flue gas and dust particles adhered to the surface of the cyclone plate 4 in actual engineering application are solved.
As shown in fig. 2. The flushing nozzle mechanism can also be of another structure, comprising a T-shaped three-way framework consisting of a transverse pipe 61 and a vertical pipe 62;
the vertical pipe 62 is movably connected with the pipe joint in the central cylinder 3 in a clearance and rotation mode; the nozzles 63 are respectively installed at two ends of the transverse pipe 61 in a mode of opposite water flow injection directions, and the vertical pipe 62 rotates along the axis of the pipe joint under the pushing action of forward and reverse water flow injection, so that the nozzles 63 automatically rotate and spray and wash in multiple directions.
The water leaked from the gap between the vertical pipe 62 and the pipe joint also has a wetting effect on the cyclone plate 4.
The self-rotating multi-azimuth spray flushing is carried out, the vertical pipe 62 is inserted into the pipe joint, most of water from the flushing water pipe 5 is pressed into the inlet of the vertical pipe 62, and a part of water can leak out from the connecting gap between the vertical pipe 62 and the pipe joint, so that the gravity and the water pressure of the T-shaped tee framework form self-balancing, constant-pressure water spraying is maintained, and the leaked water can form a stable liquid film on the cyclone plate to form self-balancing; and the flowing liquid film formed by water flowing out of the gaps between the vertical pipes 62 and the pipe joints can reduce the axial rotation resistance of the vertical pipes 62. The reverse nozzles of the two nozzles 63 spray water with a certain momentum, and can automatically rotate due to the mutual pushing action principle of the forces, so that even water spraying can be realized under the condition of less water flow, and the effects of saving water, evenly wetting the cyclone plate 4 and forming a liquid film are achieved.
The outer cylinder 1 is sealed with the upper edge of the screen cylinder 2.
The outer cylinder body 1, the screen cylinder body 2 and the central cylinder body 3 are of an integrated structure or correspond to each stage of cyclone plate 4, and are manufactured into a multi-section detachable, spliced or threaded assembly structure; the specific stage number is flexibly set according to the process requirement.
The bottom of the water collecting tank 7 is provided with an automatic outer drain pipe valve 8; the problems of water balance of the desulfurizing tower and the washing tower are skillfully solved, the problems of flushing time and water quantity of flushing water are further solved, and the problems of continuous film forming and blockage are also further solved.
An electromagnetic valve or a manual valve is arranged on the pipeline of the flushing water pipe 5. The solenoid valve may be computer controlled.
The method for preventing secondary carrying, dust removal and demisting can be realized by the following steps:
the flue gas enters from the lower part of the cyclone plate dust removal and defogging device and flows through the multi-stage cyclone plate 4, the flue gas forms a cyclone space under the flow guiding and cyclone action of the cyclone plate 4, and dust particles in the flue gas collide with a liquid film on the cyclone plate 4 and fog drops in the cyclone space and are condensed; solid particles condensed with water pass through the sieve pore sections of the screen cylinder body 2 under the action of centrifugal force and enter a smoke dead zone formed between the screen cylinder body 2 and the outer cylinder body 1;
the flue gas with fog drops continuously flows upwards, under the flow guiding and rotational flow actions of the rotational flow plate 4 at the last stage, the fog drops in the flue gas enter the flue gas dead zone again through the screen cylinder 2 due to the centrifugal force action, the flue gas is adsorbed on the inner wall of the outer cylinder 1 to form a water film, and the flue gas from which dust particles and fog drops are removed flows out from the top of the screen cylinder 2, so that the separation of the flue gas from dust and fog drops is completed;
at the same time, dust particles and mist droplets adsorbed in the liquid film on the inner wall of the outer cylinder 1 fall down into the water collection tank 7 by the action of gravity, are collected by the water collection tank 7, and are discharged.
As described above, the present invention can be preferably realized.
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. The utility model provides a whirl board dust removal defogging device that prevents secondary carrying which characterized in that: comprises an outer cylinder body (1), a screen cylinder body (2) and a central cylinder body (3) which are sleeved in sequence from outside to inside at intervals;
the middle and lower peripheral wall of the screen cylinder body (2) is a hole-free section (21), and the middle and upper peripheral wall is a sieve pore section;
a multi-stage cyclone plate (4) is arranged in the sieve pore section at intervals from top to bottom; except the last stage of cyclone plates (4), flushing nozzle mechanisms are arranged above the rest stages of cyclone plates (4); the flushing nozzle mechanism is connected with an external water source through a flushing water pipe (5);
the swirl plate (4) is sleeved outside the central cylinder (3); the outer edge of the swirl plate (4) is jointed with the inner surface of the screen cylinder body (2);
the bottom of the screen cylinder body (2) is sealed with the bottom of the pore-free section (21), and a cavity between the pore-free section (21) and the outer cylinder body (1) forms a water collecting tank (7);
spray water of the flushing nozzle mechanism wets the blades of the cyclone plate (4) and forms a liquid film on the surfaces of the blades;
the flue gas enters from the lower part of the cyclone plate dust removal and defogging device and flows through the multi-stage cyclone plate (4), the flue gas forms a cyclone space under the flow guiding and cyclone action of the cyclone plate (4), and dust particles in the flue gas collide with a liquid film on the cyclone plate (4) and fog drops in the cyclone space and are condensed; solid particles condensed with water pass through the sieve pore section of the screen cylinder body (2) under the action of centrifugal force and enter a smoke dead zone formed between the screen cylinder body (2) and the outer cylinder body (1);
the flue gas with fog drops continuously flows upwards, under the flow guiding and rotational flow actions of the last stage rotational flow plate (4), the fog drops in the flue gas enter the flue gas dead zone again through the screen cylinder (2) due to the centrifugal force action, the flue gas is adsorbed on the inner wall of the outer cylinder (1) to form a water film, and the flue gas from which dust particles and fog drops are removed flows out from the top of the screen cylinder (2), so that the separation of the flue gas from dust and fog drops is completed;
at the same time, under the action of gravity, dust particles and fog drops in a liquid film adsorbed on the inner wall of the outer cylinder body (1) fall into the water collecting tank (7), are collected by the water collecting tank (7) and are discharged;
the flushing nozzle mechanism comprises a plurality of flushing nozzles (6) which spray downwards; the plurality of flushing nozzles (6) are distributed above the cyclone plate (4) in a staggered manner through pipe joints in the central cylinder body (3) in a lattice mode to form dead-angle-free spraying; an external water source is conveyed to the flushing nozzle (6) through the flushing water pipe (5) and the pipe joint;
the flushing nozzle mechanism comprises a T-shaped three-way framework formed by a transverse pipe (61) and a vertical pipe (62);
the vertical pipe (62) is movably connected with the pipe joint in the central cylinder (3) in a clearance and rotation mode; the nozzles (63) are respectively arranged at two ends of the transverse pipe (61) in a mode of opposite water flow injection directions, and the vertical pipe (62) rotates along the axis of the pipe joint under the pushing action of forward and reverse water flow injection, so that the nozzles (63) automatically rotate and spray and wash in multiple directions;
the water leaked from the gap between the vertical pipe (62) and the pipe joint also has a wetting effect on the cyclone plate (4);
the bottom of the water collecting tank (7) is provided with an automatic drain pipe valve (8);
an electromagnetic valve is arranged on a pipeline of the flushing water pipe (5).
2. The secondarily-carried cyclone plate dust and mist removing device is characterized in that: the outer cylinder body (1) is sealed with the upper edge of the screen cylinder body (2).
3. The secondarily-carried cyclone plate dust and mist removing device is characterized in that: the outer cylinder body (1), the screen cylinder body (2) and the central cylinder body (3) are of an integrated structure or correspond to each stage of cyclone plate (4) to form a multi-section detachable plug-in assembly structure.
4. A method for preventing secondary carrying, dedusting and demisting, which is characterized by being realized by adopting the cyclone plate dedusting and demisting device in any one of claims 1-3, and comprising the following steps:
the flue gas enters from the lower part of the cyclone plate dust removal and defogging device and flows through the multi-stage cyclone plate (4), the flue gas forms a cyclone space under the flow guiding and cyclone action of the cyclone plate (4), and dust particles in the flue gas collide with a liquid film on the cyclone plate (4) and fog drops in the cyclone space and are condensed; solid particles condensed with water pass through the sieve pore section of the screen cylinder body (2) under the action of centrifugal force and enter a smoke dead zone formed between the screen cylinder body (2) and the outer cylinder body (1);
the flue gas with fog drops continuously flows upwards, under the flow guiding and rotational flow actions of the last stage rotational flow plate (4), the fog drops in the flue gas enter the flue gas dead zone again through the screen cylinder (2) due to the centrifugal force action, the flue gas is adsorbed on the inner wall of the outer cylinder (1) to form a water film, and the flue gas from which dust particles and fog drops are removed flows out from the top of the screen cylinder (2), so that the separation of the flue gas from dust and fog drops is completed;
at the same time, dust particles and mist droplets adsorbed in a liquid film on the inner wall of the outer cylinder (1) fall into the water collecting tank (7) under the action of gravity, and are collected by the water collecting tank (7) and discharged.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113477009A (en) * | 2021-07-20 | 2021-10-08 | 江苏华星电力环保设备有限公司 | Wet-type dust removal defogging integrated device |
| CN113731026B (en) * | 2021-08-05 | 2023-03-14 | 中石化宁波工程有限公司 | Tower top water drop separation structure |
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| WO2014153570A2 (en) * | 2013-03-15 | 2014-09-25 | Transtar Group, Ltd | New and improved system for processing various chemicals and materials |
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| CN2294098Y (en) * | 1997-04-24 | 1998-10-14 | 上海市环境保护科学研究院 | Cross-flow, gas washing and water film type dust removing and desulfurizing equipment |
| CN102803668A (en) * | 2009-06-12 | 2012-11-28 | 马勒国际有限公司 | Oil mist separator |
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