CN111450653B - Device for purifying dust-carrying pressure gas - Google Patents

Device for purifying dust-carrying pressure gas Download PDF

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Publication number
CN111450653B
CN111450653B CN202010545277.8A CN202010545277A CN111450653B CN 111450653 B CN111450653 B CN 111450653B CN 202010545277 A CN202010545277 A CN 202010545277A CN 111450653 B CN111450653 B CN 111450653B
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gas
pipe
container
dust
closed container
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CN111450653A (en
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马晓辉
高卫明
周君
周红兵
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Shanghai Construction No 4 Group Co Ltd
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Shanghai Construction No 4 Group Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/40Combinations of devices covered by groups B01D45/00 and B01D47/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/02Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/12Washers with plural different washing sections

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Particles Using Liquids (AREA)

Abstract

The invention belongs to the field of air purification, and provides a device for purifying gas with dust under pressure, which aims to solve the problems that the existing air purification equipment carrying dust is lack, and especially the existing dust removal equipment cannot adapt to construction sites in the building industry when the dust is serious, and comprises: one-level gravity type deposits storehouse and second grade spraying purification storehouse, one-level gravity type deposits the storehouse through first pipeline and second grade spraying purification storehouse sealing connection, takes the dust to press gaseous through one-level gravity type to deposit storehouse and second grade spraying purification storehouse in proper order and carry out hierarchical purification treatment, one-level gravity type deposits the storehouse and can press gaseous expansion deceleration to the dust and make the solid particle in the gas deposit, second grade spraying purification storehouse can press gaseous spraying to the dust and make the solid particle in the gas dissolve in water or meet water increase weight and deposit to reach simple and convenient, high-efficient, hierarchical purification and take the dust to press gaseous effect.

Description

Device for purifying dust-carrying pressure gas
Technical Field
The invention belongs to the field of air purification, and particularly relates to a device for purifying dust-containing pressurized gas.
Background
With the establishment of beautiful home gardens as a national strategy, dust emission control in environmental problems relates to the health of each citizen and becomes a focus of attention in daily life of common people. The building industry is brought into one of air pollution prevention and control main battlefields, and the dust emission problem is a control core element. The pressure gas emission pollution with dust of cement silos, mortar silos and the like in construction sites is a serious disaster area. At present, the most dust control measures are adopted, the polluted air is isolated or a method of covering a pollution source is suggested, and the dust pollution prevention and control means is very effective. The existing commercial dedusting equipment is too expensive to adapt to the field characteristics of the building industry to effectively operate due to the lack of air purification equipment carrying dust, especially when the dust is serious.
Therefore, how to provide a simple and effective device for purifying dust-laden pressurized gas has become a technical problem that needs to be further improved and optimized in the building construction industry.
Disclosure of Invention
The invention aims to provide a device for purifying dust-carrying pressure gas, which achieves the purpose of precipitating dust by expanding the dust-carrying pressure gas and reducing the speed, and achieves the effect of purifying the dust-carrying pressure gas in a grading way by spraying to increase the weight of the dust so as to precipitate or dissolve water.
In order to solve the technical problems, the invention provides the following technical scheme:
an apparatus for purifying dust-laden pressurized gas, comprising: the method comprises the following steps: the first-stage gravity type precipitation bin is in sealing connection with the second-stage spray purification bin through a first pipeline, gas with dust pressure sequentially passes through the first-stage gravity type precipitation bin and the second-stage spray purification bin for graded purification treatment, the first-stage gravity type precipitation bin can perform capacity expansion and speed reduction on the gas with dust pressure to enable solid particles in the gas to be precipitated, the second-stage spray purification bin can perform spraying on the gas with dust pressure to enable the solid particles in the gas to be dissolved in water or to be precipitated by increasing the weight of the gas with the water, the first-stage gravity type precipitation bin comprises a first closed container and a first inversion container, a first gas inlet is formed in the top of the first closed container, a precipitation residual material recovery port is formed in the bottom of the first closed container, the first inversion container is of an inverted U-shaped structure, and the first inversion container is coaxially arranged in the first closed container, the top of the first inverted container is provided with a first gas outlet externally connected with a first pipeline, the bottom of the first inverted container is provided with an opening, gas to be treated enters the first closed container through a first gas inlet, flows into the first inverted container from the bottom opening of the first inverted container after passing through a channel between the first closed container and the first inverted container, and finally flows out through a first gas outlet, the channel between the first closed container and the first inverted container serves as a primary flash chamber, the inner space of the first inverted container is an inverted secondary flash chamber, and the flow cross section of the first inverted container is larger than or equal to that of the channel between the first closed container and the first inverted container.
Preferably, in the device for purifying the pressured gas with dust, the bottom of the first closed container is a funnel structure, the small end of the funnel structure serves as a precipitated remainder recycling port, a gravity type spring automatic opening and closing cover is arranged at the precipitated remainder recycling port, the gravity type spring automatic opening and closing cover comprises a hoop, a cover plate, a cover hook, a first spring hinge and a second spring hinge, the hoop is fixedly arranged at the outer side of the lower part of the funnel structure, a first lug plate and a second lug plate are respectively arranged at the opposite sides of the hoop, the upper end of the cover hook is hinged with the first lug plate through the first spring hinge, one end of the cover plate is hinged with the second lug plate through the second spring hinge, the other end of the cover plate is connected with the cover hook in a snap-fit manner, an outward-protruding elastic bulge is arranged at the upper part of the other end of the cover plate, and an inward-recessed elastic groove is arranged at the inner side of the lower part of the cover hook, the convex elastic bulge is matched with the concave elastic groove, when the weight of the deposited dust on the cover plate is larger than or equal to a design value, the cover plate is automatically opened, and when the weight of the deposited dust on the cover plate is smaller than the design value, the cover plate is automatically closed.
Preferably, in the device for purifying the dust-containing pressurized gas, a distance between the vertical central axis of the first inverted container and the side wall of the first inverted container is 0.71-0.8 of a distance between the vertical central axis of the first inverted container and the side wall of the first closed container, and a distance between the bottom of the first inverted container and a maximum allowable stacking height line of the settled residues in the first closed container is greater than or equal to a distance between the side wall of the first inverted container and the side wall of the first closed container.
Preferably, in the apparatus for purifying a gas under pressure containing dust, the cross sections of the first inverted container and the first closed container are circular, the distance from the outer wall of the first inverted container to the inner wall of the first closed container is equal, the upper part of the first inverted container is in a convex arc shape, and the cross section of the upper part of the first inverted container is gradually enlarged from top to bottom.
Preferably, in the apparatus for purifying gas under pressure with dust, the secondary spray purification bin includes a second closed container, a second inverted container and a plurality of pipelines with spray heads, the top of the second closed container is provided with a second gas inlet externally connected to the first pipeline, the lower part of the second closed container is used as a water collecting tank, the bottom of the water collecting tank is provided with a first waste water discharge valve, the second inverted container is of an inverted U-shaped structure, the second inverted container is coaxially arranged in the second closed container, the top of the second inverted container is provided with a second gas outlet, the bottom of the second inverted container is provided with an opening, the gas treated by the primary gravity type precipitation bin enters the second closed container through the second gas inlet, and flows into the second inverted container from the bottom opening of the second inverted container after passing through a channel between the second closed container and the second inverted container, and finally, the water flows out of the second air outlet, a plurality of pipelines with the spray heads are respectively arranged on the inner wall of the second closed container and the inner wall and the outer wall of the second inverted container, and the water in the water collecting tank is pumped to each spray head through a pressure pump.
Preferably, in the apparatus for purifying the gas under pressure with dust, the cross sections of the second inverted container and the second closed container are circular, the distance from the outer wall of the second inverted container to the inner wall of the second closed container is equal, the upper portion of the second inverted container is in a convex arc shape, the cross section of the upper portion of the second inverted container is gradually enlarged from top to bottom, and the second air outlet is externally connected with an exhaust valve for exhausting purified gas.
Preferably, in foretell device that dust had pressure gas of purification, be equipped with horn mouth type filter screen in the second closed container, the osculum end of horn mouth type filter screen is installed in the bottom of second closed container and is enclosed the outside of locating the bottom delivery port of second closed container, the macrostoma end of horn mouth type filter screen is installed in the lateral wall of second closed container inboard, the force pump sets up in the downside of horn mouth type filter screen, evenly set up a plurality of high pressure washing terminals that are used for washing horn mouth type filter screen along same level on the lateral wall of second closed container, high pressure washing terminals's direction can be adjusted
Preferably, in the device for purifying the gas with dust and pressure, the device further comprises a third-stage liquid dedusting mixing bin, the second-stage spray purification bin is hermetically connected with the third-stage liquid dedusting mixing bin through a second pipeline, the third-stage liquid dedusting mixing bin comprises a third closed container and a liquid-gas combiner, the third closed container is provided with a second waste water discharge valve at the bottom, the top of the third closed container is provided with a discharge valve, the liquid-gas combiner is arranged in the third closed container, the liquid-gas combiner comprises an air inlet pipe, and a liquid inlet pipe, an air suction pipe, a liquid-gas mixing pipe and a diffusion pipe which are coaxially connected in sequence, the end part of the liquid inlet pipe, which is far away from the air suction pipe, is a liquid inlet, the liquid inlet pipe is provided with a liquid booster pump, the end part of the diffusion pipe, which is far away from the liquid-gas mixing pipe, is a liquid-gas discharge port, the other end of the air inlet pipe is connected with a second pipeline.
Preferably, in the above apparatus for purifying a dust-laden pressurized gas, the liquid-gas coupler satisfies the following relationship:
q3= (1.25-1.5) × V1 × 1/4 × pi × d1 × d1, and d2= (1.5-1.75) × d1, d3= (1.118-1.225) × d1, wherein Q3 is the flow rate of gas in the gas inlet pipe, V1 is the flow rate of liquid in the liquid inlet pipe, d1 is the pipe diameter of the liquid inlet pipe, d2 is the pipe diameter of the liquid-gas mixing pipe, and d3 is the pipe diameter of the gas inlet pipe.
Preferably, in the device for purifying the pressurized gas with dust, the pipe diameter of the air suction pipe is gradually increased from the liquid inlet pipe to the liquid-gas mixing pipe, the pipe wall of the air suction pipe is a convex arc-shaped surface, one end of the air inlet pipe is connected to the arc-shaped surface of the air suction pipe, and the length of the air suction pipe is at least 0.75 times of the pipe diameter of the liquid inlet pipe; the liquid-gas mixing pipe is a linear pipe section, the length of the liquid-gas mixing pipe is at least more than 7 times of the pipe diameter of the liquid-gas mixing pipe, and the pipe diameter of the liquid-gas mixing pipe is 1-2 times of the pipe diameter of the liquid inlet pipe; the diffuser pipe is the tubaeform pipe section, the pipe diameter of diffuser pipe is crescent from inside to outside, the length of diffuser pipe is 1~1.5 times of the pipe diameter of liquid-gas hybrid tube, the pipe wall of diffuser pipe is beta to the inclination of outside, and tan (beta) = 1/7-1/5.
Preferably, in the device for purifying the pressure gas with dust, a plurality of guide plates are further arranged in the third closed container, the lower surfaces of the guide plates are arc plates, a plurality of arc grooves are formed in the arc plates at equal intervals, the depth of each arc groove is smaller than the width of each arc groove, and the width of each arc groove is smaller than the distance between every two adjacent arc grooves. According to the technical scheme disclosed above, compared with the prior art, the invention has the following beneficial effects:
the device for purifying the gas with dust and pressure provided by the invention adopts the first-stage gravity type precipitation bin and the second-stage spraying purification bin, the first-stage gravity type precipitation bin is used for expanding and decelerating the gas with dust and pressure to precipitate solid particles in the gas, and the second-stage spraying purification bin is used for spraying the gas with dust and pressure to dissolve the solid particles in the gas in water or increase the weight of the gas with water to precipitate, so that the effect of simply, conveniently and efficiently purifying the gas with dust and pressure in a grading manner is achieved. The first-stage gravity type settling bin comprises a first closed container and a first inverted container, wherein the first inverted container is of an inverted U-shaped structure and is coaxially arranged in the first closed container, a first air inlet is formed in the top of the first closed container, and a first air outlet externally connected with a first pipeline is formed in the top of the first inverted container, so that the first inverted container with the inverted U-shaped structure is coaxially arranged in the first closed container, the structure is more compact, the required occupied area is smaller, the speed reduction efficiency is higher, the through-flow cross section of the first inverted container is larger than or equal to that of a channel between the first closed container and the first inverted container, and the defect of secondary acceleration caused by the fact that the through-flow cross section of an airflow channel is greatly reduced is avoided.
In addition, the cross sections of the first inverted container and the first closed container are circular, the distance from the outer wall of the first inverted container to the inner wall of the first closed container is equal, the upper part of the first inverted container is in a convex arc shape, and the cross section of the upper part of the first inverted container is gradually enlarged from top to bottom. Streamlining is the external shape of an object, usually represented by a smooth and regular surface, without large undulations and sharp corners. The fluid appears predominantly laminar on the surface of the streamlined object with little or no turbulence, which ensures that the object is subjected to less resistance.
Drawings
Fig. 1 is a schematic overall structure diagram of a device for purifying dust-laden pressurized gas according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a first gravity type settling bin according to a first embodiment of the present invention.
Fig. 3 is a schematic structural view of a gravity spring automatic opening/closing cover according to a first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a two-stage spray purification bin in the first embodiment of the present invention.
Fig. 5 is a schematic view of the overall structure of a device for purifying a dust-laden pressurized gas according to a second embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a secondary spray purification bin in the second embodiment of the present invention.
Fig. 7 is a schematic structural view of a three-stage liquid dedusting mixing bin in the second embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a liquid-gas combiner in the second embodiment of the present invention.
Fig. 9 is a schematic structural view of a baffle in a second embodiment of the present invention.
In the figure: 1-first-stage gravity type precipitation bin, 11-first closed container, 112-first air inlet, 113-precipitation excess material recovery port, 12-first inverted container, 121-first air outlet, 2-second-stage spray purification bin, 21-second closed container, 211-second air inlet, 22-second inverted container, 221-second air outlet, 23-spray head, 24-first waste water discharge valve, 25-exhaust valve, 26-pressure pump, 27-bell mouth type filter screen, 28-high pressure flushing spray head, 3-third-stage liquid dedusting mixing bin, 31-third closed container, 32-liquid-gas connector, 321-liquid inlet pipe, 322-air suction pipe, 323-liquid-gas mixing pipe, 324-diffusion pipe, 325-air inlet pipe, liquid-gas mixing pipe, 324-diffusion pipe, and the like, 33-a second wastewater discharge valve, 34-an exhaust valve, 35-a filter screen, 36-a guide plate, 361-an arc groove, 37-a liquid booster pump, 38-a liquid injection pipe, 4-a first pipeline, 5-a second pipeline, 6-a gravity type spring automatic opening and closing cover, 61-a hoop, 62-a cover plate, 621-a convex elastic bulge, 63-a cover hook, 631-a concave elastic groove, 64-a first spring hinge and 65-a second spring hinge.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. The technical contents and features of the present invention will be described in detail below with reference to the embodiments illustrated in the accompanying drawings. It is further noted that the drawings are in greatly simplified form and are not to precise scale, merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
Example one
Referring to fig. 1 to 4, the present embodiment discloses an apparatus for purifying a dust-laden pressurized gas, wherein the pressure of the dust-laden pressurized gas is 0.05-0.3MPa, and the apparatus includes: one-level gravity type deposits storehouse 1 and second grade spraying purification storehouse 2, one-level gravity type deposits storehouse 1 through first pipeline 4 and second grade spraying purification storehouse 2 sealing connection, has the dust to press gaseous through one-level gravity type in proper order and deposits storehouse 1 and second grade spraying purification storehouse 2, one-level gravity type deposits storehouse 1 can press gaseous expanding capacity deceleration to the dust and makes the solid particle in the gas deposit, second grade spraying purification storehouse 2 can press gaseous spraying to the dust and make the solid particle in the gas dissolve in water or meet water increase weight and deposit.
The invention provides a device for purifying gas with dust pressure, which adopts a primary gravity type precipitation bin 1 and a secondary spray purification bin 2, wherein the primary gravity type precipitation bin 1 is used for expanding and decelerating the gas with dust pressure to precipitate solid particles with the particle size of 10-100 mu m in the gas, and the secondary spray purification bin 2 is used for spraying the gas with dust pressure to dissolve the solid particles with the particle size of 2.5-10 mu m in the gas in water or increase the weight of the gas in water to precipitate, so that the effect of simply, conveniently and efficiently purifying the gas with dust pressure in a grading manner is achieved.
Preferably, in the above apparatus for purifying gas under pressure with dust, the primary gravity type settling bin 1 includes a first closed container 11 and a first inverted container 12, a first air inlet 112 is formed in a top of the first closed container 11, a residual settling material recovery port 113 is formed in a bottom of the first closed container 11, the first inverted container 12 is of an inverted U-shaped structure, the first inverted container 12 is coaxially disposed in the first closed container 11, a first air outlet 121 externally connected to the first pipeline 4 is formed in a top of the first inverted container 12, a bottom opening of the first inverted container 12 is disposed, a through-flow cross-section of the first inverted container 12 is greater than or equal to a through-flow cross-section of a passage between the first closed container 11 and the first inverted container 12, the passage between the first closed container 11 and the first inverted container 12 serves as a primary flash chamber, an internal space of the first inverted container 12 is a secondary flash chamber, the gas to be treated enters the first closed container 11 through the first gas inlet 112, flows into the first inverted container 12 from the bottom opening of the first inverted container 12 after passing through the passage between the first closed container 11 and the first inverted container 12, and finally flows out through the first gas outlet 121. On one hand, in the invention, on the one hand, the pneumatic structural layout of the primary flash chamber and the inverted secondary flash chamber adopts a built-in design, namely the first inverted container 12 in an inverted U-shaped structure is coaxially arranged in the first closed container 11, so that the integral structure of the primary gravity type settling bin 1 can be more compact, the required occupied area is smaller and the speed reduction efficiency is higher under the condition of realizing the same expansion volume; on the other hand, since the through-flow cross section of the first inverted container 12 is equal to or greater than the through-flow cross section of the passage between the first closed container 11 and the first inverted container 12, the disadvantage of secondary acceleration caused by the reduction of the through-flow cross section of the gas flow passage from a large size is avoided.
The primary gravity type settling bin 1 with the structure mainly aims at solid particles with the particle size of 10-100 microns, 50% of the total solid particles can be reduced, gas to be treated enters the first closed container 11 through the first gas inlet 112 and moves downwards along a channel between the first closed container 11 and the first inverted container 12, and then flows into the first inverted container 12 from the bottom opening of the first inverted container 12, so that the capacity expansion and speed reduction of gas with dust pressure are realized, namely, the gas flow rate is reduced by expanding the volume, the flow velocity kinetic energy of dust particles is reduced, the solid particles with the particle size of 10-100 microns cannot continuously enter the secondary spray purification bin 2 after the kinetic energy of the solid particles is reduced, and the solid particles are settled under the action of gravity and recovered.
In addition, the cross sections of the first inverted container 12 and the first closed container are circular, the distance from the outer wall of the first inverted container 12 to the inner wall of the first closed container 11 is equal, the upper part of the first inverted container 12 is in a convex arc shape, and the cross section of the upper part of the first inverted container 12 is gradually enlarged from top to bottom. Streamlining is the external shape of an object, usually represented by a smooth and regular surface, without large undulations and sharp corners. The fluid appears predominantly laminar on the surface of the streamlined object with little or no turbulence, which ensures that the object is subjected to less resistance.
Preferably, in the device for purifying the gas under pressure with dust, a distance between a vertical central axis of the first inverted container 12 and a side wall of the first inverted container 12 is 0.71-0.8 of a distance between the vertical central axis of the first inverted container 12 and a side wall of the first closed container 11, and a distance between a bottom of the first inverted container 12 and a maximum allowable stacking height line of the excess material precipitated in the first closed container 11 is greater than or equal to a distance between the side wall of the first inverted container 12 and the side wall of the first closed container 11.
Preferably, in the above device for purifying the dust-containing pressurized gas, the bottom of the first closed container 11 is a funnel structure, a small end of the funnel structure is used as the deposition remainder recovery port 113, a gravity type spring automatic opening and closing cover 6 is disposed at the deposition remainder recovery port 113, the gravity type spring automatic opening and closing cover 6 includes an anchor ear 61, a cover plate 62, a cover hook 63, a first spring hinge 64 and a second spring hinge 65, the anchor ear 61 is fixedly disposed at the outer side of the lower portion of the funnel structure, a first ear plate and a second ear plate are respectively disposed at opposite sides of the anchor ear 61, the upper end of the cover hook 63 is hinged to the first ear plate through the first spring hinge 64, one end of the cover plate 62 is hinged to the second ear plate through the second spring hinge 65, the other end of the cover plate 62 is connected to the cover hook 63 in a snap manner, an outward protruding elastic protrusion is disposed at the upper portion of the other end of the cover plate 62, the inner side of the lower part of the cover hook 63 is provided with an inward concave elastic groove 631, the outward convex elastic protrusion 621 is matched with the inward concave elastic groove 631, when the weight of the deposited dust on the cover plate 62 is greater than or equal to a design value, the gravity of the deposited dust on the cover plate 62 overcomes the elastic acting force of the second spring hinge and the mechanical self-locking force between the outward convex elastic protrusion and the inward concave elastic groove of the cover hook, the cover plate 62 is automatically opened, and when the weight of the deposited dust on the cover plate 62 is smaller than the design value, the cover plate 62 is automatically closed under the elastic acting force of the second spring hinge 65, and mechanical self-locking is formed between the outward convex elastic protrusion and the inward concave elastic groove of the cover hook. That is, the precipitated solid particles, i.e., dust, can be recycled through the gravity type spring automatic opening and closing cover arranged at the bottom of the first closed container 11, the gravity type spring automatic opening and closing cover automatically opens and closes, and the spring principle is utilized, and when the weight of the dust reaches a certain weight, the dust excess material is automatically released and recycled; after the dust is released, the gravity type spring automatic opening and closing cover is automatically closed.
Preferably, in the above apparatus for purifying gas under pressure containing dust, the secondary spray purification bin 2 includes a second closed container 21, a second inverted container 22 and a plurality of pipes with spray heads 23, the top of the second closed container 21 is provided with a second gas inlet 211 externally connected to the first pipe 4, the lower part of the second closed container 21 is used as a water collecting tank, the bottom of the water collecting tank is provided with a first waste water discharge valve 24, the second inverted container is in an inverted U-shaped structure, the second inverted container 22 is coaxially arranged in the second closed container 21, the top of the second inverted container 22 is provided with a second gas outlet 221, the bottom of the second inverted container 22 is provided with an opening, gas to be processed after being processed by the primary gravity type precipitation bin 1 enters the second closed container 21 through the second gas inlet 211, and after passing through a channel between the second closed container 21 and the second inverted container 22, the water flows into the second inverted container 22 from the bottom opening of the second inverted container 22 and finally flows out through the second air outlet 221, a plurality of pipelines with the spray nozzles 23 are respectively arranged on the inner wall of the second closed container 21 and the inner wall and the outer wall of the second inverted container 22, and the water in the water collecting pool is pumped to each spray nozzle 23 through a pressure pump. The two-stage spray purification bin 2 with the structure can reduce 30% of total solid particles mainly aiming at the solid particles with the particle size of 2.5-10 mu m, and humidifies dust-laden pressure gas through the spray head 23, so that the solid particles with the particle size of 2.5-10 mu m in the dust-laden pressure gas are added with water to increase weight and precipitate or the dust is dissolved in the water, and the purpose of purifying the air is achieved.
Preferably, in the above apparatus for purifying a gas under pressure containing dust, the flow cross section of the second inverted container 22 is equal to or greater than the flow cross section of the passage between the second closed container 21 and the first inverted container 22, so that the disadvantage of secondary acceleration caused by the flow cross section of the gas flow passage decreasing from a large value is avoided.
Preferably, in the above apparatus for purifying a dust-containing pressurized gas, the cross sections of the second inverted container 22 and the second closed container 21 are circular, the distance from the outer wall of the second inverted container 22 to the inner wall of the second closed container 21 is equal, the upper portion of the second inverted container 22 is in a convex arc shape, and the cross section of the upper portion of the second inverted container 22 is gradually enlarged from top to bottom, so that the gas can flow along the streamline passage between the second closed container 21 and the second inverted container 22, and no vortex or turbulent resistance is generated at the reentrant part.
Preferably, in the above apparatus for purifying the dust-laden pressurized gas, the second air outlet 221 is externally connected with an exhaust valve 25 for exhausting the purified gas.
In order to make the flow of the dust-laden pressurized gas more stable, it is preferable that, in the apparatus for purifying the dust-laden pressurized gas, the distance from the outer wall of the second inverted container 22 to the inner wall of the second closed container 21 is equal, the upper portion of the second inverted container 22 is in the shape of an arc which is convex outward, the cross section of the upper portion of the second inverted container 22 is gradually enlarged from top to bottom, and the flow cross section of the second inverted container 22 is equal to or greater than the flow cross section of the passage between the second closed container 21 and the second inverted container 22. The distance between the vertical central axis of the second inverted container and the side wall of the second inverted container is 0.71-0.8 of the distance between the vertical central axis of the second inverted container 22 and the side wall of the second closed container 21, and the distance between the bottom of the second inverted container 22 and the highest allowable height line of the liquid level in the second closed container 21 is greater than or equal to the distance between the side wall of the second inverted container 22 and the side wall of the second closed container 21. The gas to be treated enters the second closed container 21 through the second gas inlet 211 and moves downwards along the channel between the second closed container 21 and the second inverted container 22, and then flows into the second inverted container 22 from the bottom opening of the second inverted container 22, so that the gas with dust pressure is subjected to spray humidification treatment while expanding the volume and reducing the speed of the gas with dust pressure, solid particles in the gas with dust pressure are dissolved in water or precipitate after increasing the weight when meeting water, and the purpose of purifying air is achieved.
Preferably, in the apparatus for purifying a dust-laden pressurized gas, a water injection pipe (not shown) is provided on a sidewall of the second closed vessel 21, the water injection pipe is located above a maximum allowable height line of a liquid level of the second closed vessel 21, an overflow pipe (not shown) is externally connected to a sidewall of the second closed vessel 21 corresponding to the maximum allowable height line of the liquid level of the second closed vessel 21, and a check valve is provided on the overflow pipe.
Preferably, in the above apparatus for purifying a pressurized gas with dust, a bell mouth-shaped filter screen is arranged in the second closed container 21, a small end of the bell mouth-shaped filter screen 27 is installed at the bottom of the second closed container 21 and surrounds the outer side of the bottom water outlet of the second closed container 21, a large end of the bell mouth-shaped filter screen 27 is installed at the inner side of the side wall of the second closed container 21, and the pressure pump 26 is arranged at the lower side of the bell mouth-shaped filter screen 27. Through setting up horn mouth type filter screen 27 as above, divide into two with the space of catch basin, one is located the upside of horn mouth type filter screen 27, and one is located the downside of horn mouth type filter screen 27, force pump 26 sets up in the downside of horn mouth type filter screen 27, can avoid introducing new impurity to taking the processing gas to purifying the spraying water source.
Preferably, in the above apparatus for purifying the pressurized gas with dust, a plurality of high-pressure flushing nozzles 28 for flushing the bell-mouth-shaped filter screen are uniformly arranged on the sidewall of the second closed container 21 along the same horizontal height, and the direction of the high-pressure flushing nozzles 28 can be adjusted, that is, the angle of the included angle α between the axis (spraying direction) of the high-pressure flushing nozzles and the sidewall of the second closed container 21 can be adjusted. The high-pressure washing nozzle 28 can wash the bell-mouth-shaped filter screen 27 without dead angles, and the cleanness of the bell-mouth-shaped filter screen 27 is guaranteed to be washed. The high pressure flush head 28 may also function as a water injection tube.
In summary, according to the device for purifying the dust-laden pressurized gas provided by the invention, the primary gravity type precipitation bin 1 is adopted to perform capacity expansion and speed reduction on the dust-laden pressurized gas so as to precipitate solid particles with the particle size of 10-100 μm in the gas, and 50% of the total solid particles can be reduced; the secondary spraying purification bin 2 is used for spraying the dust pressurized gas to enable solid particles with the particle size of 2.5-10 microns in the gas to be dissolved in water or to be precipitated after the weight of the solid particles is increased when the solid particles meet water, and 30% of the total solid particles can be reduced, so that the effect of purifying the dust pressurized gas in a simple, efficient and graded mode is achieved.
Example two
Referring to fig. 5 to 9 in combination with fig. 1 to 4, the difference between the first embodiment and the second embodiment is: the second air outlet 221 is not externally connected with an exhaust valve 25 for discharging purified gas, but is hermetically connected with the third-stage liquid dedusting mixing bin 3 through a second pipeline 5, that is, the second-stage spray purification bin 2 is hermetically connected with the third-stage liquid dedusting mixing bin 3 through the second pipeline 5.
The three-stage liquid dedusting mixing bin 3 comprises a third closed container 31 provided with liquid (in this embodiment, the liquid is water) and a liquid-gas combiner 32, a second wastewater discharge valve 33 is arranged at the bottom of the third closed container 31, an exhaust valve 34 is arranged at the top of the third closed container 31, a liquid injection pipe 38 is arranged at the upper part of the side wall of the third closed container 31, the liquid-gas combiner 32 is arranged in the third closed container 31, the liquid-gas combiner 32 comprises an air inlet pipe 325 and a liquid inlet pipe 321, an air suction pipe 322, a liquid-gas mixing pipe 323 and a diffusion pipe 324 which are coaxially connected in sequence, the end part, far away from the air suction pipe 322, of the liquid inlet pipe 321 is a liquid inlet, a filter screen 35 is arranged at the outer side of the liquid inlet and used for filtering the liquid entering the liquid-gas combiner 32, a liquid booster pump 37 is arranged on the liquid inlet pipe 321, and the end part, far away from the liquid-gas mixing pipe 323, one end of the air inlet pipe 325 is connected to the side wall of the air suction pipe 322, and the other end of the air inlet pipe 325 is connected to the second pipeline 5. The three-stage liquid dedusting mixing bin 3 with the structure can reduce 10% of total solid particles mainly aiming at the solid particles with the particle size of less than 2.5 microns, and fully mixes the gas with dust under pressure and the liquid in the liquid-gas combiner 32, in the embodiment, the liquid adopts water, so that the solid particles with the particle size of less than 2.5 microns in the gas, namely PM 2.5-grade micro particles, are fully mixed with the water in a water-gas manner, and the PM 2.5-grade dust and the water-soluble harmful substances in the gas are further reduced by utilizing the characteristic that the dust and the water-soluble harmful substances are dissolved in the water, thereby not only reducing the dust pollution, but also purifying the original water-soluble harmful substances in the air.
In order to make the dust-laden pressurized gas and the water fuse more sufficiently and effectively reduce the PM2.5 dust and the water-soluble harmful substances in the gas, it is preferable that, in the above-mentioned purification apparatus for dust-laden pressurized gas, the liquid-gas combiner 32 satisfies the following relationship: q3= (1.25-1.5) × V1 × 1/4 × pi × d1 × d1, and d2= (1.5-1.75) × d1, d3= (1.118-1.225) × d1, wherein Q3 is the flow rate of gas in the gas inlet pipe 325, V1 is the flow rate of liquid in the liquid inlet pipe 321, V1 can be 4 m/s-5 m/s, d1 is the pipe diameter of the liquid inlet pipe 321, d2 is the pipe diameter of the liquid-gas mixing pipe 323, and d3 is the pipe diameter of the gas inlet pipe 325.
Preferably, in the above purification apparatus for pressurized gas with dust, the pipe diameter of the gas suction pipe 322 gradually increases from the liquid inlet pipe 321 to the liquid-gas mixing pipe 323, the pipe wall of the gas suction pipe 322 is an arc surface protruding outward, one end of the gas inlet pipe 325 is connected to the arc surface of the gas suction pipe 322, the lengths of the liquid inlet pipe 321, the gas suction pipe 322, the liquid-gas mixing pipe 323, and the diffuser pipe 324 are L1 to L4, respectively, and the length L2 of the gas suction pipe 322 is at least 0.75 times of the pipe diameter of the liquid inlet pipe 321, so that the optimal matching between the amount of gas sucked by the gas suction pipe 322 and the pipe diameter and flow rate of the liquid inlet pipe 321 is achieved, and the efficiency of the gas suction amount.
Preferably, in the above purification apparatus for the dust-containing pressurized gas, the liquid-gas mixing pipe 323 is a linear pipe section, the length L3 of the liquid-gas mixing pipe 323 is at least 7 times or more of the pipe diameter d2 of the liquid-gas mixing pipe 323, and the pipe diameter d2 of the liquid-gas mixing pipe 323 is 1 to 2 times of the pipe diameter d1 of the liquid inlet pipe 321, so that the mixing degree of the liquid and the gas and the kinetic energy loss of the fluid can be optimally matched.
Preferably, in the above purification apparatus for a pressure gas with dust, the diffuser 324 is a trumpet-shaped pipe section, the pipe diameter of the diffuser 324 gradually increases from inside to outside, the length L4 of the diffuser is 1 to 1.5 times of the pipe diameter d1 of the liquid-gas mixing pipe 323, the pipe wall of the diffuser 324 has an outward inclination angle β, and tan (β) =1/7-1/5, so that the discharge direction and discharge amount of the liquid-gas mixture can be optimally matched.
Preferably, in the above purification apparatus for a pressure gas with dust, the third closed container 21 is further provided with a plurality of flow guide plates 36, the lower surfaces of the flow guide plates 36 are arc plates, the arc plates are provided with a plurality of arc grooves 361 at equal intervals, the depth of each arc groove 361 is smaller than the width of each arc groove 361, and the width of each arc groove 361 is smaller than the distance between adjacent arc grooves 361.
In summary, according to the purification device for the dust-laden pressurized gas provided by the invention, the primary gravity type precipitation bin 1 is adopted to perform capacity expansion and speed reduction on the dust-laden pressurized gas so as to precipitate solid particles with the particle size of 10-100 μm in the gas, and 50% of the total solid particles can be reduced; the secondary spraying purification bin 2 is adopted to spray the dust pressurized gas, so that solid particles with the particle size of 2.5-10 microns in the gas are dissolved in water or increase the weight when meeting water to precipitate, and the total solid particles can be reduced by 30%; the three-stage liquid dedusting mixing bin 3 is adopted to carry out liquid-gas combination treatment on the dust pressurized gas, so that solid particles with the particle size of less than 2.5 microns in the gas are further dissolved in the liquid, and 10% of the total solid particles can be reduced, thereby achieving the effect of purifying the dust pressurized gas simply, efficiently and in a grading manner.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims (8)

1. A device for purifying dust-bearing pressurized gas, comprising: the device comprises a first-level gravity type precipitation bin and a second-level spray purification bin, wherein the first-level gravity type precipitation bin is hermetically connected with the second-level spray purification bin through a first pipeline, the gas with dust pressure sequentially passes through the first-level gravity type precipitation bin and the second-level spray purification bin for graded purification treatment, the first-level gravity type precipitation bin can perform capacity expansion and speed reduction on the gas with dust pressure to precipitate solid particles in the gas, the second-level spray purification bin can perform spraying on the gas with dust pressure to dissolve the solid particles in the gas into water or increase the weight of the gas with the water to precipitate, the first-level gravity type precipitation bin comprises a first closed container and a first inverted container, a first gas inlet is formed in the top of the first closed container, a precipitation residual material recovery port is formed in the bottom of the first closed container, the first inverted container is of an inverted U-shaped structure, and the first inverted container is coaxially arranged in the first closed container, the top of the first inverted container is provided with a first air outlet externally connected with a first pipeline, the bottom of the first inverted container is provided with an opening, gas to be processed enters the first closed container through a first air inlet, flows into the first inverted container from the bottom opening of the first inverted container after passing through a channel between the first closed container and the first inverted container, and finally flows out through a first air outlet, the channel between the first closed container and the first inverted container is used as a primary flash chamber, the inner space of the first inverted container is an inverted secondary flash chamber, the through-flow cross section of the first inverted container is larger than or equal to that of the channel between the first closed container and the first inverted container, the cross sections of the first inverted container and the first closed container are circular, and the distance from the outer wall of the first inverted container to the inner wall of the first closed container is equal, the upper part of the first inverted container is in a convex arc shape, the cross section of the upper part of the first inverted container is gradually enlarged from top to bottom, the device for purifying gas with dust and pressure further comprises a third-stage liquid dedusting and mixing bin, the second-stage spray purification bin is hermetically connected with the third-stage liquid dedusting and mixing bin through a second pipeline, the third-stage liquid dedusting and mixing bin comprises a third closed container with liquid and a liquid-gas combiner, a second wastewater discharge valve is arranged at the bottom of the third closed container, an exhaust valve is arranged at the top of the third closed container, the liquid-gas combiner is arranged in the third closed container, the liquid-gas combiner comprises an air inlet pipe, and a liquid inlet pipe, an air suction pipe, a liquid-gas mixing pipe and a diffusion pipe which are coaxially connected in sequence, a liquid inlet is arranged at the end part, far away from the air suction pipe, of the liquid inlet pipe is, the end part, far away from the liquid-gas mixing pipe, of the diffusion pipe is a liquid-gas discharge port, one end of the air inlet pipe is connected to the side wall of the air suction pipe, and the other end of the air inlet pipe is connected with a second pipeline.
2. The device for purifying pressured gas with dust of claim 1, wherein the bottom of the first closed container is a funnel structure, the small end of the funnel structure is a collection port of the settled remainder, the collection port of the settled remainder is provided with a gravity type spring automatic open-close cover, the gravity type spring automatic open-close cover comprises a hoop, a cover plate, a cover hook, a first spring hinge and a second spring hinge, the hoop is fixedly arranged at the outer side of the lower part of the funnel structure, the opposite sides of the hoop are respectively provided with a first ear plate and a second ear plate, the upper end of the cover hook is hinged with the first ear plate through the first spring hinge, one end of the cover plate is hinged with the second ear plate through the second spring hinge, the other end of the cover plate is connected with the cover hook in a snap-fit manner, the upper part of the other end of the cover plate is provided with an outward-protruding elastic bulge, the inner side of the lower part of the cover hook is provided with an inward-recessed elastic groove, the convex elastic bulge is matched with the concave elastic groove, when the weight of the deposited dust on the cover plate is larger than or equal to a design value, the cover plate is automatically opened, and when the weight of the deposited dust on the cover plate is smaller than the design value, the cover plate is automatically closed under the action of the second spring hinge, and mechanical self-locking is formed between the convex elastic bulge and the concave elastic groove of the cover hook.
3. The apparatus for purifying dust-laden pressurized gas according to claim 1, wherein the distance between the vertical central axis of the first inverted container and the side wall of the first inverted container is 0.71 to 0.8 of the distance between the vertical central axis of the first inverted container and the side wall of the first closed container, and the distance between the bottom of the first inverted container and the maximum allowable stockpile height line of the settled residue in the first closed container is greater than or equal to the distance between the side wall of the first inverted container and the side wall of the first closed container.
4. The device for purifying pressurized gas with dust according to claim 1, wherein the secondary spray purification bin comprises a second closed container, a second inverted container and a plurality of pipelines with spray heads, a second gas inlet externally connected with the first pipeline is formed in the top of the second closed container, the lower part of the second closed container is used as a water collecting tank, a first waste water discharge valve is formed in the bottom of the water collecting tank, the second inverted container is of an inverted U-shaped structure, the second inverted container is coaxially arranged in the second closed container, a second gas outlet is formed in the top of the second inverted container, a bottom opening of the second inverted container is arranged, gas treated by the primary gravity type precipitation bin enters the second closed container through the second gas inlet, and flows into the second inverted container from the bottom opening of the second inverted container after passing through a channel between the second closed container and the second inverted container, and finally, the water flows out of the second air outlet, a plurality of pipelines with the spray heads are respectively arranged on the inner wall of the second closed container and the inner wall and the outer wall of the second inverted container, and the water in the water collecting tank is pumped to each spray head through a pressure pump.
5. The device for purifying the pressurized gas with dust according to claim 4, wherein a bell mouth-shaped filter screen is arranged in the second closed container, a small end of the bell mouth-shaped filter screen is installed at the bottom of the second closed container and surrounds the outside of a bottom water outlet of the second closed container, a large end of the bell mouth-shaped filter screen is installed at the inner side of the side wall of the second closed container, the pressure pump is arranged at the lower side of the bell mouth-shaped filter screen, a plurality of high-pressure flushing nozzles for flushing the bell mouth-shaped filter screen are uniformly arranged on the side wall of the second closed container along the same horizontal height, and the direction of the high-pressure flushing nozzles can be adjusted.
6. The apparatus for purifying pressurized gas with dust according to claim 5, wherein the liquid-gas joiner satisfies the following relationship:
q3= (1.25-1.5) × V1 × 1/4 × pi × d1 × d1, and d2= (1.5-1.75) × d1, d3= (1.118-1.225) × d1, wherein Q3 is the flow rate of gas in the gas inlet pipe, V1 is the flow rate of liquid in the liquid inlet pipe, d1 is the pipe diameter of the liquid inlet pipe, d2 is the pipe diameter of the liquid-gas mixing pipe, and d3 is the pipe diameter of the gas inlet pipe.
7. The apparatus according to claim 5, wherein the pipe diameter of the air intake pipe is gradually increased from the liquid inlet pipe to the liquid-gas mixing pipe, and the pipe wall of the air intake pipe is a convex arc surface, one end of the air intake pipe is connected to the arc surface of the air intake pipe, and the length of the air intake pipe is at least 0.75 times of the pipe diameter of the liquid inlet pipe; the liquid-gas mixing pipe is a linear pipe section, the length of the liquid-gas mixing pipe is at least more than 7 times of the pipe diameter of the liquid-gas mixing pipe, and the pipe diameter of the liquid-gas mixing pipe is 1-2 times of the pipe diameter of the liquid inlet pipe; the diffuser pipe is the tubaeform pipe section, the pipe diameter of diffuser pipe is crescent from inside to outside, the length of diffuser pipe is 1~1.5 times of the pipe diameter of liquid-gas hybrid tube, the pipe wall of diffuser pipe is beta to the inclination of outside, and tan (beta) = 1/7-1/5.
8. The apparatus for purifying pressurized gas with dust as claimed in claim 5, wherein a plurality of flow guide plates are further provided in the third closed vessel, the lower surface of the flow guide plate is an arc plate, a plurality of arc grooves are provided at equal intervals on the arc plate, the depth of the arc groove is smaller than the width of the arc groove, and the width of the arc groove is smaller than the distance between adjacent arc grooves.
CN202010545277.8A 2020-06-16 2020-06-16 Device for purifying dust-carrying pressure gas Active CN111450653B (en)

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DE1571772B2 (en) * 1966-03-10 1976-07-08 Metallgesellschaft Ag, 6000 Frankfurt ABSORPTION DEVICE
FR2893669B1 (en) * 2005-11-18 2008-01-11 Lab Sa Sa WASHER FOR EXHAUST GAS PURIFICATION OF A DIESEL ENGINE, METHOD FOR CARRYING OUT THE SAME, AND CORRESPONDING MARINE VEHICLE
US8523987B2 (en) * 2009-12-09 2013-09-03 Yau Lee Innovative Technology Limited Dust arrester and method for removing dust particles from air
CN102205901A (en) * 2010-11-14 2011-10-05 龙口矿业集团有限公司 Ash valve capable of automatically opening and closing by using gravity
CN203315877U (en) * 2013-05-11 2013-12-04 安徽省温禾木业有限公司 Air-dust separation device in dust discharging system
CN103867731A (en) * 2014-04-08 2014-06-18 哈密市金磁封环保科技有限公司 Rotating clamping sealer of magnetic rotor shaft
CN207756282U (en) * 2018-01-22 2018-08-24 龙岩市辉丰工贸有限公司 A kind of high efficiency electrostatic dust-extraction unit

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