CN108639592B - Floating valve type anti-blocking fluidization ash conveying method and system for dust remover - Google Patents
Floating valve type anti-blocking fluidization ash conveying method and system for dust remover Download PDFInfo
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- CN108639592B CN108639592B CN201810391232.2A CN201810391232A CN108639592B CN 108639592 B CN108639592 B CN 108639592B CN 201810391232 A CN201810391232 A CN 201810391232A CN 108639592 B CN108639592 B CN 108639592B
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- blocking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/72—Fluidising devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/36—Arrangements of containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/58—Devices for accelerating or decelerating flow of the materials; Use of pressure generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/06—Fluidising
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The invention provides a floating valve type anti-blocking fluidization ash conveying method and system for a dust remover, comprising the following steps: the dust remover is provided with an ash bucket at the lower end, an ash outlet conduit is penetrated on the side wall of the ash bucket, and the outlet of the ash outlet conduit is connected with an ash conveying air supply pipe; the fluidizer is fixedly arranged at the lower end of the ash hopper, the fluidizer is positioned below the inlet of the ash outlet guide pipe, the inlet at the lower end of the fluidizer is connected with the fluidization air supply pipe, and a plurality of floating valves capable of ventilating are arranged at intervals at the upper end of the fluidizer; the nitrogen gun comprises a nitrogen tank and a plurality of jet pipes, the jet pipes penetrate through the fluidizer at intervals along the circumferential direction, the inlet of each jet pipe is connected with the nitrogen tank, and the outlet of each jet pipe penetrates out of the fluidizer and is provided with a torrent ejector. The invention realizes dense-phase pneumatic ash conveying by combining fluidization and ash conveying, solves the problem of continuous blockage of ash, and has reliable ash conveying and low cost.
Description
Technical Field
The invention relates to the technical field of ash conveying engineering, in particular to a floating valve type anti-blocking fluidization ash conveying method and system, and more particularly relates to a floating valve type anti-blocking fluidization ash conveying method and system for a dust remover.
Background
A phenomenon in which solid particles exhibit a fluid-like state under the influence of a fluid is called fluidization, i.e. fluidization. The solid particles can be conveyed through a pipeline after fluidization, namely pneumatic conveying, and the pneumatic conveying can be divided into dilute phase pneumatic conveying and concentrated phase pneumatic conveying according to the proportion of the solid particles to the gas.
The dilute phase pneumatic conveying is characterized in that the materials are uniformly distributed in the air flow of the pipeline, the concentration is low, the speed is high, as shown in the schematic diagram of the dilute phase pneumatic conveying in fig. 1, a large amount of carrier gas is needed, the operation cost is high, the flow speed is high, the scouring abrasion of the inner wall of the pipeline is high, a ceramic pipe or a wear-resistant pipe is needed to be arranged, and the construction investment cost is high. The dense phase pneumatic conveying is characterized in that a section of pipeline is filled with materials to form a bolt column shape, the flowing speed is low, the pipeline is little in abrasion, and the materials are conveyed through the pressure difference on two sides of the bolt column, as shown in a schematic diagram of the dense phase pneumatic conveying in FIG. 2, and the defect of dilute phase pneumatic conveying is avoided.
In the current blast furnace engineering construction project, the dust remover uses high-pressure nitrogen to directly purge and carry out ash conveying, but the ash conveying phenomenon of a dilute phase is generated, a large amount of nitrogen is needed, the operation cost is high, and ash conveying cannot be realized under the condition of blockage, so as to avoid blockage, a vibrator is used for removing blockage, but continuous blockage (namely continuous blockage exists in the middle part of blockage, the bulk density is high), the vibrator can generate a phenomenon of more compaction, and more serious blockage can be caused, in the prior art, the blockage is removed by using a nitrogen gun (as shown in fig. 3), and the dust remover comprises a nitrogen tank 7, an electromagnetic valve 9 and an output straight pipe 8, but is only suitable for axial discontinuous blockage and does not have a working condition adjusting function.
Disclosure of Invention
The invention aims to provide a floating valve type anti-blocking fluidization ash conveying system for a dust remover, which realizes dense-phase pneumatic ash conveying in a mode of combining fluidization and ash conveying, solves the problem of continuous blockage of ash, and is reliable in ash conveying and low in cost.
The invention further aims to provide a floating valve type anti-blocking fluidization ash conveying method for the dust remover, which realizes dense-phase pneumatic ash conveying through a mode of combining fluidization and ash conveying, solves the problem of continuous blockage of ash, and is reliable in ash conveying and low in cost.
The above object of the present invention can be achieved by the following technical solutions:
the invention provides a floating valve type anti-blocking fluidization ash conveying system for a dust remover, wherein the floating valve type anti-blocking fluidization ash conveying system for the dust remover comprises the following components: the dust remover is provided with an ash bucket at the lower end, an ash outlet conduit is penetrated on the side wall of the ash bucket, and the outlet of the ash outlet conduit is connected with an ash conveying air supply pipe; the fluidizer is fixedly arranged at the lower end of the ash hopper, the fluidizer is positioned below the inlet of the ash outlet guide pipe, the inlet at the lower end of the fluidizer is connected with the fluidization air supply pipe, and a plurality of floating valves capable of ventilating are arranged at intervals at the upper end of the fluidizer; the nitrogen gun comprises a nitrogen tank and a plurality of injection pipes, wherein the injection pipes penetrate through the fluidizer at intervals along the circumferential direction, the inlet of each injection pipe is connected with the nitrogen tank, and the outlet of each injection pipe penetrates out of the fluidizer and is provided with a torrent injector.
In a preferred embodiment, the inlet of the ash discharge conduit is provided with an ash collecting cover, and the outlet of the ash discharge conduit is connected with the ash conveying and supplying pipe in an inclined mode at a preset included angle.
In a preferred embodiment, the outlet of the ash conveying air supply pipe is connected with the ash bin through an ash conveying main pipe, and ash entering the ash conveying air supply pipe from the ash hopper through the ash outlet pipe can be gathered into the ash bin through the ash conveying main pipe under the action of ash conveying gas in the ash conveying air supply pipe.
In a preferred embodiment, the fluidizer comprises a body and a diversion tower, the detachable seal of the diversion tower is arranged below the body, a sealing plate is arranged at the upper end of the body, a plurality of holes are formed in the sealing plate, the floating valve can move up and down and penetrate through the holes, the outlet end of the fluidization air supply pipe stretches into the diversion tower, and fluidization gas entering the diversion tower through the fluidization air supply pipe can enter the ash bucket through each floating valve.
In a preferred embodiment, an upper flange is arranged at the opening at the lower end of the body, a lower flange is arranged at the opening at the upper end of the diversion tower, and the body is connected with the diversion tower in a sealing manner through the upper flange and the lower flange.
In a preferred embodiment, the float valve comprises a valve cap and a valve seat, a valve rod is arranged between the valve seat and the valve cap, a spring is sleeved on the valve rod, the valve seat and the spring are both positioned in the body, and the valve cap is positioned outside the body and can be sealed by a cover arranged at the opening of the body.
In a preferred embodiment, the lower end of the valve cap is provided with a sealing inclined surface along the circumferential direction, the opening of the sealing plate is provided with an inclined peripheral wall, and the sealing inclined surface of the valve cap can be in sealing fit with the inclined peripheral wall of the opening.
In a preferred embodiment, the inclined peripheral wall forms an angle of less than 60 degrees with the horizontal.
In a preferred embodiment, a plurality of slits are formed in the sealing inclined surface of the valve cap at intervals along the circumferential direction, and the body can be communicated with the ash bucket through the slits in a state that the sealing inclined surface of the valve cap is not fully attached to the inclined peripheral wall of the opening.
In a preferred embodiment, the slit is in the shape of an acute triangle.
In a preferred embodiment, the torrent injector comprises an outer pipe and an inner pipe, the inner pipe can move up and down and is arranged in the outer pipe in a penetrating manner, a first upper inner annular plate and a second upper inner annular plate are arranged at the upper end of the inner wall of the outer pipe in a protruding manner at intervals, a lower inner annular plate is arranged at the lower end of the inner wall of the outer pipe in a protruding manner, an inner throat opening is arranged in the middle of the inner pipe, an upper outer annular plate is arranged at the upper end of the inner throat opening of the inner pipe in a protruding manner, a lower outer annular plate is arranged at the lower end of the inner throat opening of the inner pipe in a protruding manner, the upper outer annular plate is arranged between the first upper inner annular plate and the second upper inner annular plate, a gap is arranged between the upper outer annular plate and the inner wall of the outer pipe, and a gap is arranged between the lower outer annular plate and the inner wall of the outer pipe.
In a preferred embodiment, the lower outer ring plate of the inner tube is in sealing contact with the lower inner ring plate of the outer tube, and the upper outer ring plate of the inner tube is in sealing contact with the first upper inner ring plate of the outer tube, in a state where the pressure of the nitrogen gas in the injection tube reaches a calibrated value.
In a preferred embodiment, the upper end of the ash bucket is provided with an upper limit ash level gauge, the lower end of the ash bucket is provided with a lower limit ash level gauge, the lower limit ash level gauge is positioned above the inlet of the ash outlet pipe, the ash outlet pipe is provided with an ash outlet valve, the ash delivery pipe is provided with an ash delivery air supply valve, the fluidization air supply pipe is provided with a fluidization air supply valve, the injection pipe is provided with a pulse electromagnetic valve, and the upper limit ash level gauge, the lower limit ash level gauge, the ash outlet valve, the ash delivery air supply valve, the fluidization air supply valve and the pulse electromagnetic valve are all electrically connected with an industrial control computer.
In a preferred embodiment, the injection pipe is provided with a normally closed drain valve, the injection pipe is provided with at least two injection branch pipes in parallel, each injection branch pipe is provided with a normally open valve and a pulse electromagnetic valve, and the internal diameters of the pulse electromagnetic valves on the injection branch pipes are unequal.
In a preferred embodiment, the ash transporting gas in the ash transporting gas supply pipe is clean gas, and the fluidizing gas in the fluidizing gas supply pipe is clean gas.
The invention also provides a floating valve type anti-blocking fluidization ash conveying method for the dust remover, wherein the floating valve type anti-blocking fluidization ash conveying method for the dust remover adopts the floating valve type anti-blocking fluidization ash conveying system for the dust remover, and the floating valve type anti-blocking fluidization ash conveying method for the dust remover comprises the following steps of: step a, starting a nitrogen gun, enabling nitrogen in a nitrogen tank to enter a torrent injector through an injection pipe, and scattering ash in an ash bucket of the dust remover through the torrent injector to form a cavity; step b, fluidizing gas entering the fluidizer through the fluidizing gas supply pipe enters the ash bucket through a plurality of floating valves and fills the cavity, so that ash at the edge of the cavity is in a fluidized suspension state; and c, enabling ash in a fluidized suspension state to enter an ash conveying and supplying pipe through an ash outlet pipe, and collecting the ash into an ash bin through an ash conveying main pipe under the action of ash conveying gas in the ash conveying and supplying pipe.
In a preferred embodiment, the ash level in the ash bucket is detected by an upper limit ash level meter and a lower limit ash level meter on the ash bucket, when the upper limit ash level meter of the dust remover alarms, the step a is executed, and when the lower limit ash level meter of the dust remover alarms, the ash outlet valve on the ash outlet pipe, the fluidization air supply valve on the fluidization air supply pipe and the ash conveying air supply valve on the ash conveying air supply pipe are closed in sequence.
In a preferred embodiment, in the step a, when the pressure of the nitrogen entering the injection pipe reaches a standard value, the inner pipe of the torrent injector moves upwards under the pressure of the nitrogen, the lower outer ring plate of the inner pipe of the torrent injector is in sealing contact with the lower inner ring plate of the outer pipe of the torrent injector, the upper outer ring plate of the inner pipe of the torrent injector is in sealing contact with the first upper inner ring plate of the outer pipe of the torrent injector, and the nitrogen in the injection pipe is accelerated through the inner throat opening of the inner pipe of the torrent injector and then injected into the ash bucket.
In a preferred embodiment, in step b, the float valve of the fluidizer is moved upwards under the pressure of the fluidizing gas to an open state, the spring of the float valve is compressed, the valve cap of the float valve is separated from the opening in the closure plate of the body of the fluidizer, and the fluidizing gas enters the hopper through the float valve.
The floating valve type anti-blocking fluidization ash conveying method and system for the dust remover have the characteristics and advantages that:
1. the invention breaks up ash in the ash bucket of the dust remover through the nitrogen cannon and the clear blocking gas (high-pressure nitrogen) sprayed by the torrent sprayer, meanwhile, the ash in the ash bucket is kept in a fluidization suspension state through the fluidization gas sprayed by the fluidizer and can enter the ash conveying air supply pipe through the ash outlet pipe, and the ash in the fluidization suspension state entering the ash conveying air supply pipe is conveyed to the ash conveying main pipe through the ash conveying gas so as to be gathered into the ash bin.
2. The invention connects the body of the fluidizer with the detachable seal of the diversion tower, is convenient for installation and maintenance, and the cooperation of a plurality of openings on the body of the fluidizer and the floating valve enables the floating valve to move upwards under the pressure of fluidization gas to be opened, so that the fluidization gas can enter the ash bucket to promote the ash to suspend and fluidize under the action of the fluidization gas, and simultaneously the openings can be sealed through the falling of the floating valve, and the plurality of slits arranged on the sealing inclined plane of the valve cap of the floating valve can realize that the fluidization gas can also enter the ash bucket upwards through the slits in the falling process of the floating valve, thereby avoiding the ash from falling into the floating valve or the fluidizer.
3. According to the invention, through the cooperation of the inner pipe and the annular plates of the outer pipe of the torrent ejector, when the pressure in the ejector pipe reaches a standard value, the blocking-removing gas only enters the inner pipe and is accelerated through the inner shrinkage throat of the inner pipe, so that the energy storage of the blocking-removing gas is increased, the flow speed and the pressure of the blocking-removing gas are improved, the blocking is removed by using the energy of high-pressure nitrogen, and the blocking-removing effect is good.
Drawings
The following drawings are only for purposes of illustration and description, and are not intended to limit the scope of the invention.
Fig. 1 is a schematic diagram of dilute phase pneumatic conveying in the prior art.
Fig. 2 is a schematic diagram of the dense phase pneumatic conveying in the prior art.
Fig. 3 is a schematic structural diagram of a nitrogen gun according to the prior art.
FIG. 4 is a schematic diagram of a floating valve type anti-blocking fluidized ash handling system for a dust collector according to the present invention.
FIG. 5 is a schematic diagram of a front view of a fluidizer of the floating valve type anti-blocking fluidization ash handling system for a dust collector of the present invention.
FIG. 6 is a schematic top view of a fluidizer of the floating valve anti-blocking fluidization ash handling system for a dust separator of the present invention.
FIG. 7 is a schematic diagram of a floating valve of a fluidizer for a floating valve type anti-blocking fluidized ash handling system for a dust collector according to this invention.
FIG. 8 is another schematic view of a floating valve of a fluidizer for a floating valve type anti-blocking fluidized ash handling system for a dust collector according to this invention.
FIG. 9 is a schematic diagram of a nitrogen gun of the floating valve type anti-blocking fluidization ash conveying system for a dust remover according to the invention.
FIG. 10 is a schematic diagram of a surge injector of the floating valve type anti-blocking fluidized ash handling system for a dust collector of the present invention.
FIG. 11 is a schematic diagram of another configuration of a torrent injector of the floating valve anti-lock fluidized ash handling system for a dust collector of the present invention.
Reference numerals illustrate:
the invention is that
1. A dust remover; 11. an ash bucket; 12. an ash discharge duct; 121. an ash collecting cover; 122. an ash outlet valve; 13. an ash conveying and gas supplying pipe; 14. an ash conveying and gas supplying valve; 15. an ash conveying main pipe;
2. a fluidizer; 21. a body; 211. a sealing plate; 212. opening holes; 213. an inclined peripheral wall; 22. a splitter column; 23. a float valve; 231. a valve seat; 232. a valve cap; 233. a guide cylinder; 234. a valve stem; 235. a spring; 236. slotting; 24. an upper flange; 25. a lower flange; 26. a fluidization air supply pipe; 27. a fluidization air supply valve;
3. nitrogen cannon; 31. a nitrogen tank; 32. a jet pipe; 321. a normally closed drain valve; 33. a jet branch pipe; 331. a normally open valve; 332. a pulse electromagnetic valve;
4. a torrent injector; 41. an outer tube; 411. a first upper inner ring plate; 412. a second upper inner ring plate; 413. a lower inner ring plate; 42. an inner tube; 421. an inner venturi orifice; 422. an upper outer ring plate; 423. a lower outer ring plate;
alpha, upper included angle; beta, lower included angle; gamma and included angle; H. an upper limit gray level meter; l, lower limit gray level meter.
Prior Art
7. A nitrogen tank; 8. an output straight pipe; 9. a solenoid valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless the directions are defined individually, the directions of up, down, left, right, front, rear, etc. referred to herein are all directions of up, down, left, right, front, rear, etc. in fig. 4 shown in the present invention, and are described herein together.
Embodiment one
As shown in fig. 4 to 11, the present invention provides a floating valve type anti-blocking fluidized ash conveying system for a dust remover, wherein the floating valve type anti-blocking fluidized ash conveying system for a dust remover comprises: the dust remover 1 is provided with an ash bucket 11 at the lower end, an ash outlet conduit 12 is arranged on the side wall of the ash bucket 11 in a penetrating way, and the outlet of the ash outlet conduit 12 is connected with an ash conveying air supply pipe 13; the fluidizer 2 is fixedly arranged at the lower end of the ash bucket 11, the fluidizer 2 is positioned below the inlet of the ash outlet conduit 12, the inlet at the lower end of the fluidizer 2 is connected with the fluidization air supply pipe 26, and a plurality of floating valves 23 capable of ventilating are arranged at intervals at the upper end of the fluidizer 2; the nitrogen cannon 3 comprises a nitrogen tank 31 and a plurality of injection pipes 32, wherein a plurality of injection pipes 32 penetrate through the fluidizer 2 at intervals along the circumferential direction, the inlet of each injection pipe 32 is connected with the nitrogen tank 31, and the outlet of each injection pipe 32 penetrates out of the fluidizer 2 and is provided with a torrent injector 4.
Specifically, the dust remover 1 is in a cylindrical shape, a filter element is arranged in the dust remover 1 and is used for filtering ash in raw gas or semi-clean gas, the dust remover 1 is a dust remover with side inlet and side outlet, or the dust remover 1 is a dust remover with side inlet and outlet, the specific internal structure of the dust remover is as known in the prior art, an ash bucket 11 at the lower end of the dust remover 1 is in a reverse conical shape and is used for temporarily storing ash, an ash outlet conduit 12 at the side wall of the ash bucket 11 is used for discharging the ash in the ash bucket 11 into an ash conveying gas supply pipe 13, and the ash in the ash conveying gas supply pipe 13 is output in a dense phase ash conveying mode through the ash conveying gas in the ash conveying gas supply pipe 13; the fluidizer 2 is in a reverse tower shape, and a fluidization air supply pipe 26 extends into the fluidizer 2 from an inlet at the lower end of the fluidizer 2 so as to supply fluidization air into the fluidizer 2 and can be discharged into the ash hopper 11 through each float valve 23 so as to fluidize ash in the ash hopper 11; the nitrogen cannon 3 serves as a fluidization starting device, so that high-pressure nitrogen released by temporarily opening the nitrogen tank 31 can impact ash deposited in the ash bucket 11 at high pressure and high speed through the injection pipe 32 and the torrent injector 4 to break up the ash, and subsequent fluidization of the ash under the action of fluidization gas is facilitated.
Further, as shown in fig. 4, the inlet of the ash discharging duct 12 is provided with an ash collecting cover 121, the outlet of the ash discharging duct 12 is connected with the ash conveying air supply pipe 13 in a predetermined inclined angle, specifically, the ash collecting cover 121 is generally in a bell mouth shape, the ash in the ash hopper 11 is facilitated to enter the ash discharging duct 12 by the arrangement of the ash collecting cover 121, the ash discharging duct 12 is arranged in a manner of being inclined from bottom to top, that is, one end of the ash discharging duct 12 in the ash hopper 11 is lower than one end of the ash discharging duct 12 connected with the ash conveying air supply pipe 13, so that the horizontal section of the ash discharging duct 12 and the ash conveying air supply pipe 13 forms an inclined angle, and the arrangement of the inclined angle is favorable for conveying the ash.
Further, as shown in fig. 4, the outlet of the ash conveying air supply pipe 13 is connected with an ash bin through an ash conveying main pipe 15, and ash entering the ash conveying air supply pipe 13 from the ash hopper 11 through the ash outlet pipe 12 can be gathered into the ash bin through the ash conveying main pipe 15 under the action of ash conveying air in the ash conveying air supply pipe 13, so that ash output is realized. Preferably, the ash transporting gas in the ash transporting gas supply pipe 13 is a clean gas, for example, the clean gas directly purified by the dust remover 1 itself is used as the ash transporting gas, and of course, nitrogen may also be used, for example, nitrogen provided by a nitrogen tank is used as the ash transporting gas, and of course, other gases may also be used as the ash transporting gas, which is not limited herein.
Further, as shown in fig. 4 to 8, the fluidizer 2 includes a body 21 and a diversion tower 22, the diversion tower 22 is detachably and hermetically disposed below the body 21, a sealing plate 211 is disposed at an upper end of the body 21, a plurality of openings 212 are disposed on the sealing plate 211, the floating valve 23 can move up and down and pass through the openings 212, an outlet end of the fluidization gas supply pipe 26 extends into the diversion tower 22, the fluidization gas entering the diversion tower 22 through the fluidization gas supply pipe 26 can enter the ash bucket 11 through each floating valve 23, specifically, the body 21 of the fluidizer 2 is substantially in a cylindrical shape, the diversion tower 22 is substantially in a semi-elliptical shape, an upper end opening of the diversion tower 22 is opposite to a lower end opening of the body 21 and can be hermetically connected with the sealing plate 211, the plurality of openings 212 on the sealing plate 211 are uniformly distributed on the sealing plate 211 or are regularly distributed (such as matrix distribution, annular distribution and the like), so that the fluidization gas in the diversion tower 22 can uniformly enter the ash bucket 11 through the fluidization gas supply pipe 26, the fluidization gas can enter the ash bucket 11 through the sealing plate 23, the fluidization gas supply pipe 23 can be directly enter the ash bucket 11 through the sealing plate 2, and the pressure of the fluidization gas inlet pipe 22 is preferably not communicated with the air inlet end of the air inlet pipe 1, and the ash bucket 11 is preferably purified, and the air can be purified through the air inlet pipe 1.
Further, as shown in fig. 5, an upper flange 24 is disposed at the opening at the lower end of the body 21, a lower flange 25 is disposed at the opening at the upper end of the splitter 22, the body 21 is connected with the splitter 22 by the upper flange 24 and the lower flange 25 in a sealing manner, wherein the diameter of the upper flange 24 is greater than the diameter of the opening at the upper end of the splitter 22 and the diameter of the opening at the lower end of the body 21, a plurality of screw holes are disposed at the periphery of the upper flange 24 at equal intervals along the circumferential direction, a plurality of screw holes are disposed at the periphery of the lower flange 25 at equal intervals along the circumferential direction, the screw holes of the upper flange 24 are in one-to-one correspondence with the screw holes of the lower flange 25, and the connection is achieved by a connecting member such as a bolt, wherein a sealing ring can be further disposed between the upper flange 24 and the lower flange 25 to ensure the sealing connection of the two.
Further, as shown in fig. 7 and 8, the float valve 23 includes a valve cap 232 and a valve seat 231, a valve rod 234 is disposed between the valve seat 231 and the valve cap 232, a spring 235 is sleeved on the valve rod 234, the valve seat 231 and the spring 235 are both located in the body 21, the valve cap 232 is located outside the body 21, and a sealable cover is disposed at the opening 212 of the body 21, specifically, the valve seat 231 of the float valve 23 is generally planar to be beneficial to bearing the pressure of the fluidizing gas, the valve rod 234 is generally rod-shaped, the spring 235 is sleeved on the valve rod 234 and can be compressed along the valve rod 234, the valve cap 232 is generally hemispherical cover body to be able to seal the opening 212, the diameter of the valve seat 231 is larger than the diameter of the opening 212, the outer diameter of the spring 235 is larger than the diameter of the opening 212, when the pressure of the fluidizing gas received by the valve seat 231 is larger than the elastic force of the spring 235 itself, the spring 235 is compressed between the valve seat 231 and the lower surface of the seal 211, the valve seat 232 is separated from the opening 212 of the seal 211, so that the fluidizing gas can enter the ash space between the valve seat 232 and the opening 212 and the ash space and enter the hopper controller 11, and the opening degree of the valve cap 2 is controlled.
Preferably, the guide cylinder 233 is protruded from the lower surface of the sealing plate 211, the valve seat 231, the valve rod 234 and the spring 235 are all located in the guide cylinder 233, when the valve seat 231 moves up or down, the valve seat 231 moves up and down along the circumferential wall of the guide cylinder 233, and the spring 235 compresses or recovers up and down along the circumferential wall of the guide cylinder 233, so that the floating valve 23 is ensured to move along a vertical up and down track through the guide cylinder 233, deflection is avoided, and the floating valve can only move in a vertical direction and cannot displace in a horizontal direction, thereby ensuring tightness and fluidization effect.
Further, as shown in fig. 8, a sealing inclined plane is disposed at the lower end of the bonnet 232 along the circumferential direction, the opening 212 of the sealing plate 211 has an inclined peripheral wall 213, the sealing inclined plane of the bonnet 232 can be in sealing fit with the inclined peripheral wall 213 of the opening 212, specifically, the circumferential sealing inclined plane is disposed at the lower periphery of the bonnet 232 in a downward inclined manner, and the opening 212 of the sealing plate 211 is disposed in a manner that the diameter of the opening 212 of the sealing plate 211 is widened from bottom to top to form the circumferential inclined peripheral wall 213 thereof, so that the bonnet 232 of the floating valve 23 can be matched with the opening 212 of the sealing plate 211. Furthermore, the included angle γ between the inclined peripheral wall 213 and the horizontal plane is smaller than 60 degrees, that is, the included angle γ between the sealing inclined plane and the horizontal plane is smaller than 60 degrees, that is, the included angle γ between the inclined peripheral wall 213 and the horizontal plane is equal to the included angle between the sealing inclined plane and the horizontal plane, preferably, the included angle is 48 degrees, and the ash can not slide under the condition of gravity due to the arrangement of the included angle.
Further, as shown in fig. 8, a plurality of slits 236 are circumferentially spaced on the sealing inclined surface of the bonnet 232, in a state that the sealing inclined surface of the bonnet 232 is not fully attached to the inclined peripheral wall 213 of the opening 212, the body 21 can be communicated with the ash bucket 11 through the slits 236, in a state that the sealing inclined surface of the bonnet 232 is fully attached to the inclined peripheral wall 213 of the opening 212, the body 21 is isolated from the ash bucket 11, that is, the slits 236 cannot be communicated with the body 21 and the ash bucket 11, wherein the slits 236 are used for blowing ash on the sealing inclined surface before the bonnet 232 is fully sealed on the opening 212, before the bonnet 232 and the opening 212 are not fully sealed, fluidized gas in the body 21 can enter the ash bucket 11 through the slits 236, so that the sealing inclined surface is clean, the sealing is ensured, and the sealing is stable and reliable, preferably, the slits 236 are gradually sealed up until the slits 236 are fully sealed up until the valve bonnet 236 are fully covered up on the opening 212.
Further, as shown in fig. 9 to 11, the surge injector 4 includes an outer tube 41 and an inner tube 42, the inner tube 42 is capable of moving up and down and is inserted into the outer tube 41, a first upper inner ring plate 411 and a second upper inner ring plate 412 are protruded at intervals on the upper end of the inner wall of the outer tube 41, a lower inner ring plate 413 is protruded on the lower end of the inner wall of the outer tube 41, an inner throat 421 is provided in the middle of the inner tube 42, an upper outer ring plate 422 is protruded on the upper end of the inner throat 421 of the inner tube 42, a lower outer ring plate 423 is protruded on the lower end of the inner throat 421 of the inner tube 42, the upper outer ring plate 422 is located between the first upper inner ring plate 411 and the second upper inner ring plate 412, a gap is provided between the upper outer ring plate 422 and the inner wall of the outer tube 41, the lower outer ring plate 423 is located below the lower inner ring plate 413, and a gap is formed between the lower outer ring plate 423 and the inner wall of the outer tube 41, so that when the air pressure of the high-pressure nitrogen gas in the injection tube 32 does not reach a standard value (the standard value here is suitable for being enough to impact ash in the ash bucket), the nitrogen gas in the injection tube 32 can be divided into two branches, the first branch enters the inner tube 42 and is discharged to inject ash into the ash bucket 11, the accumulated ash is impacted, the second branch sequentially passes through the gap between the lower outer ring plate 423 and the outer tube 41, the gap between the lower inner ring plate 413 and the inner tube 42, the gap between the inner tube 42 and the outer tube 41, the gap between the second upper inner ring plate 412 and the inner tube 42, the gap between the upper outer ring plate 422 and the outer tube 41, and the gap between the first upper inner ring plate 411 and the inner tube 42, and then the ash bucket 11 is discharged, wherein the inner throat 421 of the inner tube 42 is formed by being recessed radially inwards, the lower included angle beta between the inclined wall surface below the inner throat 421 and the vertical surface of the inner tube 42 is smaller than the upper included angle alpha between the inclined wall surface above the inner throat 421 and the vertical surface of the inner tube 42, so that high-pressure nitrogen can be rapidly ejected after being compressed and accelerated through the inner throat 421, the scattering effect is ensured, namely, the inner tube 42 is firstly necked and then necked, the flow speed is improved when the air flow is necked, potential energy is converted into kinetic energy when the air flow is necked, the kinetic energy is converted into potential energy when the air flow is necked, a shock wave surface is formed, the shock wave surface has potential energy with a higher element than the pressure of the air flow, ash blocked above the shock flow ejector can be pushed away easily, and a condition is created for fluidization.
Further, as shown in fig. 11, in a state that the pressure of the nitrogen gas in the injection pipe 32 reaches the calibration value, the lower outer ring plate 423 of the inner pipe 42 is in sealing contact with the lower inner ring plate 413 of the outer pipe 41, and the upper outer ring plate 422 of the inner pipe 42 is in sealing contact with the first upper inner ring plate 411 of the outer pipe 41, so that the nitrogen gas in the injection pipe 32 can only pass through the inner pipe 42 of the first branch and be discharged, but cannot enter the second branch, thereby ensuring that the nitrogen gas is fully accelerated in the inner pipe 42, and ensuring the nitrogen acceleration effect and the scattering effect of ash in the ash bucket 11. The invention restricts the flow of high-pressure nitrogen flowing in the high-pressure nitrogen through the special structure of the torrent ejector 4, and utilizes the structure of the inner throat 421 and the upward movement of the inner pipe 42 in the outer pipe 41 to change the flow passage restriction nitrogen flow, so that part of kinetic energy which cannot be used for pushing ash blockage of the high-pressure nitrogen is converted into pressure potential energy, the nitrogen is pressurized, the energy of the blockage removal gas is increased, and the blockage removal effect is improved.
Further, as shown in fig. 4 and 9, the upper end of the ash bucket 11 is provided with an upper limit ash level gauge H, the lower end of the ash bucket 11 is provided with a lower limit ash level gauge L, the lower limit ash level gauge L is positioned above the inlet of the ash discharge conduit 12 (preferably, the lower limit ash level gauge L is positioned at 500mm above the inlet of the ash discharge conduit 12), the ash level in the ash bucket 11 is early warned in time, the ash level is prevented from falling below the lower limit ash level gauge L, the fluidization gas is caused to directly enter the ash bucket 11 (wherein the upper limit ash level gauge H and the lower limit ash level gauge L are known in the prior art, such as a radio frequency admittance meter, a pressure sensor and the like), the inlet of the ash discharge conduit 12 is ensured to be always positioned in ash, the ash discharge conduit 12 is provided with an ash discharge valve 122, the ash conveying gas supply pipe 13 is provided with an ash conveying gas supply valve 14, the fluidization air supply pipe 26 is provided with a fluidization air supply valve 27, the injection pipe 32 is provided with a pulse electromagnetic valve 332, the upper limit ash position meter, the lower limit ash position meter, the ash outlet valve 122, the ash conveying air supply valve 14, the fluidization air supply valve 27 and the pulse electromagnetic valve 332 are all electrically connected with an industrial personal computer so as to realize information feedback of each valve, and the industrial personal computer realizes linkage control, for example, when the ash content in the ash bucket 11 exceeds an upper limit set value, the upper limit ash position meter feeds a signal back the industrial personal computer, the industrial personal computer controls to open the ash outlet valve 122 and controls the pulse electromagnetic valve 332 to open so as to provide clear blocking gas, and after the pulse electromagnetic valve 332 is opened, the fluidization air supply valve 27 and the ash conveying air supply valve 14 are opened so as to respectively provide fluidization gas and ash conveying gas, wherein the industrial personal computer is a technology known in the prior art, and is not limited.
Further, as shown in fig. 9, the injection pipe 32 is provided with a normally closed drain valve 321, at least two injection branch pipes 33 are connected in parallel, each injection branch pipe 33 is provided with a normally open valve 331 and a pulse electromagnetic valve 332, the internal diameters of the pulse electromagnetic valves 332 on the injection branch pipes 33 are unequal, specifically, the normally closed drain valve 321 is used for draining accumulated water in the injection pipe 32, the normally closed drain valve 321 is in a closed state in a normal state, and is opened when drainage is needed, or a normally closed drain valve is respectively arranged on each injection branch pipe 33 as required, the normally open valve 331 is in an open state in a normal state and is closed when a certain injection branch pipe 33 needs to be overhauled, the pulse electromagnetic valve 332 is in a closed state in a normal state, and is opened to provide clear blocking gas when an opening signal of an industrial personal computer is received, and the specific structures of the normally closed drain valve 321, the normally closed drain valve 331 and the pulse electromagnetic valve 332 are in known structures in the prior art, and the normally closed drain valve 332 can provide high-pressure nitrogen gas supply required by various working conditions.
Further, the nitrogen tank 31 of the nitrogen gun 3 is generally cylindrical, and its outlet end is connected to each injection pipe 32, and its outlet end may be further provided with a pressure sensor, a temperature sensor and a flow sensor for detecting, displaying and feeding back to the industrial personal computer (or controller).
According to the floating valve type anti-blocking fluidization ash conveying system (namely, the floating valve type anti-blocking fluidization ash conveying system) for the dust remover, blocking removal gas (high-pressure nitrogen) is provided through the nitrogen cannon 3, namely, high-pressure nitrogen in a nitrogen tank 31 of the nitrogen cannon is instantaneously released by utilizing the opening moment of a pulse electromagnetic valve 332 of the nitrogen cannon 3, so that blocking removal is carried out on ash conveying blocking or ash unloading blocking, blocking removal gas is sprayed into an ash bucket 11 in an accelerating manner through a torrent sprayer 4 to break up ash in the ash bucket 11, fluidization gas is provided through a fluidizer 2, so that ash in the ash bucket 11 is kept in a fluidization suspension state, ash in the fluidization suspension state is conveyed to an ash conveying pipe 13 through an ash conveying gas concentrated phase in the ash conveying pipe to an ash conveying main pipe 15, the coupling of a fluidization technology and the concentrated phase ash conveying technology is realized, the fluidization effect is high, the problem of large-range continuous ash blocking can be effectively solved, ash deposition blocking is avoided, the ash conveying air quantity is saved, and the cost is low.
Second embodiment
The invention also provides a floating valve type anti-blocking fluidization ash conveying method (namely a floating valve type anti-blocking fluidization ash conveying method) for the dust remover, wherein the floating valve type anti-blocking fluidization ash conveying method for the dust remover adopts the floating valve type anti-blocking fluidization ash conveying system for the dust remover, and the structure, the working principle and the effect of the floating valve type anti-blocking fluidization ash conveying system for the dust remover are the same as those of the first embodiment, and the floating valve type anti-blocking fluidization ash conveying method for the dust remover comprises the following steps of:
step a, starting a nitrogen gun 3, enabling nitrogen in a nitrogen tank 31 to enter a torrent injector 4 through an injection pipe 32, and scattering ash in an ash bucket 11 of the dust remover 1 through the torrent injector 4 to form a cavity;
step b, fluidizing gas entering the fluidizer 2 through the fluidizing gas supply pipe 26 enters the ash bucket 11 through a plurality of float valves 23 and fills the cavity, so that ash at the edge of the cavity is in a fluidized suspension state;
step c, ash in a fluidized suspension state enters an ash conveying air supply pipe 13 through an ash outlet pipe 12 and is gathered into an ash bin through an ash conveying main pipe 15 under the action of ash conveying gas in the ash conveying air supply pipe 13.
Further, detecting ash positions in the ash bucket 11 through an upper limit ash position meter and a lower limit ash position meter on the ash bucket 11, and executing the step a when the upper limit ash position meter of the dust remover 1 alarms, namely feeding back the detection result of the upper limit ash position meter to an industrial personal computer, controlling the on-off of the nitrogen cannon 3 through the industrial personal computer, starting fluidization preparation work, namely ash breaking up and blocking removal work, so as to push away thick ash blocking, and certainly, if the ash bucket 11 is blocked in operation, and the like, controlling the on-off of the nitrogen cannon 3 through the industrial personal computer at any time, and starting blocking removal work, wherein blocking removal gas is high-pressure nitrogen in the nitrogen cannon 3; when the lower limit ash level meter of the dust remover 1 alarms, the ash outlet valve 122 on the ash outlet conduit 12, the fluidization air supply valve 27 on the fluidization air supply pipe 26 and the ash conveying air supply valve 14 on the ash conveying air supply pipe 13 are sequentially closed, so that ash is completely conveyed, wherein ash conveying gas is nitrogen or clean gas.
Further, in the step a, when the pressure of the nitrogen entering the injection pipe 32 reaches the calibration value, the inner pipe 42 of the shock injector 4 moves upwards under the pressure of the nitrogen, the lower outer annular plate 423 of the inner pipe 42 of the shock injector 4 is in sealing contact with the lower inner annular plate 413 of the outer pipe 41 of the shock injector 4, the upper outer annular plate 422 of the inner pipe 42 of the shock injector 4 is in sealing contact with the first upper inner annular plate 411 of the outer pipe 41 of the shock injector 4, and the nitrogen in the injection pipe 32 is injected into the ash bucket 11 after being accelerated through the inner throat 421 of the inner pipe 42 of the shock injector 4, so that the high-pressure nitrogen entering the inner pipe 42 is accelerated again through the shock injector 4, the energy storage of the high-pressure nitrogen is realized, the speed and the impact force of the high-pressure nitrogen entering the ash bucket 11 are ensured, the ash in the ash bucket 11 is ensured to be blocked, and the guarantee is provided for the subsequent fluidization work and the ash delivery work.
Further, in the step b, the float valve 23 of the fluidizer 2 moves upward under the pressure of the fluidizing gas to be opened, the spring 235 of the float valve 23 is compressed, the valve cap 232 of the float valve 23 is separated from the opening 212 on the sealing plate 211 of the body 21 of the fluidizer 2, the fluidizing gas enters the ash bucket 11 through the float valve 23, so that the ash in the ash bucket 11 keeps in a fluidized suspension state under the action of the fluidizing gas, and conditions are created for dense phase ash delivery, wherein the fluidizing gas is high-pressure clean gas, such as high-pressure clean gas entering a high-pressure clean gas pipe after being purified by the dust remover 1, and of course, the fluidizing gas can also be other gases.
In step c, ash conveying gas flows through the ash conveying gas supply pipe 13, the ash outlet valve 122 is opened, after the ash in the ash hopper 11 is fluidized, a low-pressure space is formed in front of the inlet of the ash outlet conduit 12, the ash in a fluidized suspension state enters the ash outlet conduit 12 and enters the ash conveying gas supply pipe 13 under the action of positive pressure of the ash outlet conduit, and clean gas in the ash conveying gas supply pipe 13 is used as a plug column pressure source of dense phase ash conveying to push the fluidized ash to finish conveying.
The floating valve type anti-blocking fluidization ash conveying method and system (namely, the floating valve type anti-blocking fluidization ash conveying method and system) for the dust remover can be suitable for various situations where ash conveying is easy to block, such as blast furnace ash, converter ash, blast furnace slag and the like in the metallurgical industry, cement ash and the like in the cement industry, glass slag and the like in the glass industry, the ash position in an ash bucket 11 of the dust remover 1 is detected through an upper limit ash position meter and a lower limit ash position meter, ash in the ash bucket 11 of the dust remover 1 is scattered through blocking gas (high-pressure nitrogen) sprayed by a nitrogen gun 3 and a torrent sprayer 4, meanwhile, ash in the ash bucket 11 is kept in a fluidization suspension state through fluidization gas sprayed by a fluidizer 2, and the ash in a fluidization suspension state can be conveyed to an ash conveying main pipe 15 through the ash conveying gas, so as to be converged into an ash bin. In addition, the invention can be applied to a coupling system (i.e. I-CHEN) for tank equalizing gas recovery and blast furnace gas dry dust removal to form a fluidization ash conveying coupling system (i.e. Fluidized conveying Coupling system in Hybrid of Equalizing gas recovery and Networks of blast furnace gas dedusters, F-CHEN for short) for tank equalizing gas recovery and blast furnace gas dry dust removal, in particular to a dense phase pneumatic ash conveying coupling system (i.e. Dense phase pneumatic ash conveying Coupling system in Hybrid of Equalizing gas recovery and Networks of blast furnace gas dedusters, D-CHEN for short) for tank equalizing gas recovery and blast furnace gas dry dust removal, for example, the invention can be applied to a furnace top equalizing gas recoverer, and the purified gas purified by a blast furnace gas dry dust removal device is used as fluidization gas and ash conveying gas, so that fluidization ash conveying is realized at an ash discharge hole.
The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any person skilled in the art can make some changes or modifications to the equivalent embodiments without departing from the scope of the technical solution of the present invention, but any simple modification, equivalent changes and modifications to the above-mentioned embodiments according to the technical substance of the present invention are still within the scope of the technical solution of the present invention.
Claims (16)
1. The floating valve type anti-blocking fluidization ash conveying system for the dust remover is characterized by comprising the following components:
the dust remover is provided with an ash bucket at the lower end, an ash outlet conduit is penetrated on the side wall of the ash bucket, and the outlet of the ash outlet conduit is connected with an ash conveying air supply pipe;
the fluidizer is fixedly arranged at the lower end of the ash hopper, the fluidizer is positioned below the inlet of the ash outlet guide pipe, the inlet at the lower end of the fluidizer is connected with the fluidization air supply pipe, and a plurality of floating valves capable of ventilating are arranged at intervals at the upper end of the fluidizer;
The nitrogen cannon comprises a nitrogen tank and a plurality of jet pipes, the jet pipes penetrate through the fluidizer at intervals along the circumferential direction, the inlet of each jet pipe is connected with the nitrogen tank, and the outlet of each jet pipe penetrates out of the fluidizer and is provided with a torrent ejector;
the fluidizer comprises a body and a diversion tower, the diversion tower is detachably and hermetically arranged below the body, a sealing plate is arranged at the upper end of the body, a plurality of holes are formed in the sealing plate, the floating valve can move up and down and penetrate through the holes, the outlet end of the fluidization air supply pipe stretches into the diversion tower, and fluidization gas entering the diversion tower through the fluidization air supply pipe can enter the ash bucket through each floating valve;
the torrent injector comprises an outer pipe and an inner pipe, wherein the inner pipe can vertically move and is arranged in the outer pipe in a penetrating manner, a first upper inner annular plate and a second upper inner annular plate are convexly arranged at the upper end of the inner wall of the outer pipe at intervals, a lower inner annular plate is convexly arranged at the lower end of the inner wall of the outer pipe, an inner throat opening is arranged in the middle of the inner pipe, an upper outer annular plate is convexly arranged at the upper end of the inner throat opening of the inner pipe, a lower outer annular plate is convexly arranged at the lower end of the inner throat opening of the inner pipe, the upper outer annular plate is positioned between the first upper inner annular plate and the second upper inner annular plate, a gap is reserved between the upper outer annular plate and the inner wall of the outer pipe, and a gap is reserved between the lower outer annular plate and the inner wall of the outer pipe;
And in a state that the pressure of nitrogen in the injection pipe reaches a standard value, the lower outer annular plate of the inner pipe is in sealed contact with the lower inner annular plate of the outer pipe, and the upper outer annular plate of the inner pipe is in sealed contact with the first upper inner annular plate of the outer pipe.
2. The floating valve type anti-blocking fluidized ash conveying system for a dust remover according to claim 1, wherein an ash collecting cover is arranged at the inlet of the ash outlet conduit, and the outlet of the ash outlet conduit is obliquely connected with the ash conveying air supply pipe at a preset included angle.
3. The floating valve type anti-blocking fluidized ash conveying system for a dust remover according to claim 2, wherein the outlet of the ash conveying air supply pipe is connected with an ash bin through an ash conveying main pipe, and ash entering the ash conveying air supply pipe from the ash hopper through the ash outlet pipe can be gathered into the ash bin through the ash conveying main pipe under the action of ash conveying gas in the ash conveying air supply pipe.
4. The floating valve type anti-blocking fluidized ash conveying system for a dust remover according to claim 1, wherein an upper flange is arranged at the opening at the lower end of the body, a lower flange is arranged at the opening at the upper end of the diversion tower, and the body and the diversion tower are connected in a sealing manner through the upper flange and the lower flange.
5. The floating valve type anti-blocking fluidized ash conveying system for a dust remover according to claim 1, wherein the floating valve comprises a valve cap and a valve seat, a valve rod is arranged between the valve seat and the valve cap, a spring is sleeved on the valve rod, the valve seat and the spring are both positioned in the body, and the valve cap is positioned outside the body and can be sealed and covered at the opening of the body.
6. The floating valve type anti-blocking fluidized ash conveying system for a dust remover according to claim 5, wherein a sealing inclined surface is arranged at the lower end of the valve cap along the circumferential direction, the opening of the sealing plate is provided with an inclined peripheral wall, and the sealing inclined surface of the valve cap can be in sealing fit with the inclined peripheral wall of the opening.
7. The floating valve anti-clogging fluid ash handling system for a dust collector of claim 6 wherein said inclined perimeter wall is at an angle of less than 60 degrees to the horizontal.
8. The floating valve type anti-blocking fluidized ash conveying system for a dust remover according to claim 6, wherein a plurality of slits are formed in the sealing inclined surface of the valve cap at intervals along the circumferential direction, and the body can be communicated with the ash bucket through the slits in a state that the sealing inclined surface of the valve cap is not fully attached to the inclined peripheral wall of the opening.
9. The floating valve anti-clogging fluid ash handling system for a dust collector of claim 8 wherein said slit is acutely angled triangle.
10. The floating valve type anti-blocking fluidization ash conveying system for a dust remover according to claim 1, wherein an upper limit ash level meter is arranged at the upper end of the ash bucket, a lower limit ash level meter is arranged at the lower end of the ash bucket, the lower limit ash level meter is positioned above an inlet of the ash outlet conduit, an ash outlet valve is arranged on the ash outlet conduit, an ash conveying air supply valve is arranged on the ash conveying air supply pipe, a fluidization air supply valve is arranged on the fluidization air supply pipe, a pulse electromagnetic valve is arranged on the injection pipe, and the upper limit ash level meter, the lower limit ash level meter, the ash outlet valve, the ash conveying air supply valve, the fluidization air supply valve and the pulse electromagnetic valve are all electrically connected with an industrial control computer.
11. The floating valve type anti-blocking fluidized ash conveying system for a dust remover according to claim 10, wherein a normally closed drain valve is arranged on the injection pipe, at least two injection branch pipes are arranged on the injection pipe in parallel, a normally open valve and a pulse electromagnetic valve are arranged on each injection branch pipe, and the inner diameters of the pulse electromagnetic valves on the injection branch pipes are unequal.
12. The floating valve type anti-blocking fluidized ash conveying system for a dust remover according to claim 1, wherein ash conveying gas in the ash conveying gas supply pipe is clean gas, and fluidization gas in the fluidization gas supply pipe is clean gas.
13. A floating valve type anti-blocking fluidization ash conveying method for a dust remover, which is characterized in that the floating valve type anti-blocking fluidization ash conveying method for the dust remover adopts the floating valve type anti-blocking fluidization ash conveying system for the dust remover according to any one of claims 1 to 12, and comprises the following steps:
step a, starting a nitrogen gun, enabling nitrogen in a nitrogen tank to enter a torrent injector through an injection pipe, and scattering ash in an ash bucket of the dust remover through the torrent injector to form a cavity;
step b, fluidizing gas entering the fluidizer through the fluidizing gas supply pipe enters the ash bucket through a plurality of floating valves and fills the cavity, so that ash at the edge of the cavity is in a fluidized suspension state;
and c, enabling ash in a fluidized suspension state to enter an ash conveying and supplying pipe through an ash outlet pipe, and collecting the ash into an ash bin through an ash conveying main pipe under the action of ash conveying gas in the ash conveying and supplying pipe.
14. The floating valve type anti-blocking fluidization ash conveying method for a dust remover according to claim 13, wherein ash positions in the ash bucket are detected through an upper limit ash position meter and a lower limit ash position meter on the ash bucket, when the upper limit ash position meter of the dust remover alarms, the step a is executed, and when the lower limit ash position meter of the dust remover alarms, an ash outlet valve on the ash outlet pipe, a fluidization air supply valve on the fluidization air supply pipe and an ash conveying air supply valve on the ash conveying air supply pipe are sequentially closed.
15. The floating valve type anti-blocking fluidization ash conveying method for a dust collector according to claim 13, wherein in the step a, when the pressure of nitrogen entering the injection pipe reaches a standard value, the inner pipe of the torrent injector moves upwards under the pressure of the nitrogen, the lower outer ring plate of the inner pipe of the torrent injector is in sealing contact with the lower inner ring plate of the outer pipe of the torrent injector, the upper outer ring plate of the inner pipe of the torrent injector is in sealing contact with the first upper inner ring plate of the outer pipe of the torrent injector, and the nitrogen in the injection pipe is injected into the ash bucket after being accelerated through the inner throat of the inner pipe of the torrent injector.
16. The floating valve type anti-blocking fluidized ash conveying method for a dust collector according to claim 13, wherein in the step b, the floating valve of the fluidizer is moved upward to be in an opened state by the pressure of the fluidizing gas, the spring of the floating valve is compressed, the valve cap of the floating valve is separated from the opening on the blocking plate of the body of the fluidizer, and the fluidizing gas is introduced into the ash bucket through the floating valve.
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