CN111714999B - Spray purification device and method - Google Patents
Spray purification device and method Download PDFInfo
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- CN111714999B CN111714999B CN202010545289.0A CN202010545289A CN111714999B CN 111714999 B CN111714999 B CN 111714999B CN 202010545289 A CN202010545289 A CN 202010545289A CN 111714999 B CN111714999 B CN 111714999B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
Abstract
The invention belongs to the field of air purification, and provides a spray purification device and a spray purification method. The dust-laden pressure gas is humidified by the spray head, so that solid particles with the particle size of 2.5-10 microns in the dust-laden pressure gas are precipitated by increasing the weight of the solid particles in water or the dust is dissolved in the water, and the aim of purifying the air is fulfilled.
Description
Technical Field
The invention belongs to the field of air purification, and particularly relates to a spray purification device and a spray purification method.
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 spray purification device and method has become a technical problem that further improvement and optimization are needed in the building construction industry.
Disclosure of Invention
The invention aims to provide a spray purification device and a spray purification method, which achieve the purpose of precipitating dust by expanding and decelerating dust-laden pressurized gas and achieve the effect of purifying the dust-laden pressurized gas in a grading way by increasing the weight of the dust through spraying to precipitate or dissolve water.
In order to solve the technical problems, the invention provides the following technical scheme:
a spray purification device comprising: the device comprises a closed container, an inverted container and a plurality of pipelines with spray heads, wherein the top of the closed container is provided with an air inlet, the lower part of the closed container is used as a water collecting tank, the bottom of the water collecting tank is provided with a first wastewater discharge valve, the inverted container is of an inverted U-shaped structure, the inverted container is coaxially arranged in the closed container, the top of the inverted container is provided with an air outlet, the bottom of the inverted container is provided with an opening, the inner wall of the closed container and the inner and outer walls of the inverted container are respectively provided with a plurality of pipelines with spray heads, and water in the water collecting tank is pumped to each spray head through a pressure pump.
Preferably, in the spray purification apparatus, a flow cross section of the inverted container is equal to or larger than a flow cross section of a passage between the closed container and the inverted container.
Preferably, in the above spray purification apparatus, the distance from the outer wall of the inverted container to the inner wall of the closed container is equal.
Preferably, in the spray purification apparatus described above, the inverted container and the closed container have circular cross sections, an upper portion of the inverted container has an arc shape protruding outward, and a cross section of the upper portion of the inverted container is gradually enlarged from top to bottom.
Preferably, in the spray purification device, the exhaust port is externally connected with an exhaust valve for exhausting purified gas.
Preferably, in the above spray purification apparatus, a distance between the bottom of the inverted container and a maximum allowable height line of the liquid surface of the closed container is equal to or greater than a distance between a side wall of the inverted container and a side wall of the closed container.
Preferably, in the spray purification apparatus, a water injection pipe is provided on a side wall of the closed container, the water injection pipe is located above a maximum allowable liquid level line of the closed container, an overflow pipe is externally connected to a side wall of the closed container at a position corresponding to the maximum allowable liquid level line of the closed container, and a check valve is provided on the overflow pipe.
Preferably, in the above-mentioned spray purification device, a bell mouth filter screen is provided in the closed container, a small opening end of the bell mouth filter screen is installed at the bottom of the closed container and surrounds the outside of the bottom water outlet of the closed container, a large opening end of the bell mouth filter screen is installed at the inner side of the side wall of the closed container, and the pressure pump is disposed at the lower side of the bell mouth filter screen.
Preferably, in the spray purification apparatus, the side wall of the closed container is uniformly provided with a plurality of high-pressure washing nozzles for washing the bell-mouth-shaped filter screen along the same horizontal height, and the direction of the high-pressure washing nozzles can be adjusted.
The invention also discloses a pressurized gas purification method, which adopts the spray purification device to spray the pressurized dust gas to dissolve solid particles in the gas in water or precipitate the solid particles after increasing the weight of the gas when meeting the water, and comprises the following steps:
the dust-carrying pressurized gas enters a channel between the closed container and the inverted container through a gas inlet at the top of the inverted container;
the dust-carrying pressure gas flows from top to bottom in a channel between the closed container and the inverted container, and pipelines arranged on the outer wall of the closed container and the inner wall of the inverted container carry out spraying humidification treatment on the dust-carrying pressure gas flowing through corresponding spraying heads;
the dust-carrying pressure gas flows downwards to the bottom of the inverted container, then flows into the closed container from bottom to top after bypassing the bottom of the side wall of the inverted container, and then is subjected to secondary spray humidification treatment on the dust-carrying pressure gas flowing through the pipeline arranged on the inner wall of the closed container through the corresponding spray head.
Preferably, in the method for purifying a pressurized gas, the pressure of the pressurized gas with dust is 0.05 to 0.3 MPa.
Preferably, in the above pressurized gas purification method, the gas treated by the spray purification device is subjected to liquid-gas combination treatment by a liquid dust removal mixing device, the spray purification device is hermetically connected with the liquid dust removal mixing device by a second pipeline, the liquid dust removal mixing device comprises a second closed container and a liquid-gas combiner, the bottom of the second closed container is provided with a second wastewater discharge valve, the top of the second closed container is provided with an exhaust valve, the liquid-gas combiner is arranged in the second closed container, the liquid-gas combiner comprises a gas inlet pipe, and a liquid inlet pipe, a gas suction pipe, a liquid-gas mixing pipe and a diffusion pipe which are coaxially connected in sequence, the free end of the liquid inlet pipe is a liquid inlet, the liquid inlet pipe is provided with a liquid booster pump, the free end of the diffusion pipe is a liquid-gas discharge port, and one end of the gas inlet pipe is connected to the side wall of the gas suction pipe, the other end of the air inlet pipe is connected with a second pipeline.
Preferably, in the pressurized gas purging method, 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 pressurized gas purification method, the pipe diameter of the gas suction pipe is gradually increased from the liquid inlet pipe to the liquid-gas mixing pipe, the pipe wall of the gas suction pipe is an arc-shaped surface protruding outwards, one end of the gas suction pipe is connected to the arc-shaped surface of the gas suction pipe, and the length of the gas 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 diffusion tube is the tubaeform pipe section, the pipe diameter of diffusion tube is crescent from inside to outside, the length of diffusion tube is 1 ~ 1.5 times of the pipe diameter of liquid-gas hybrid tube, the pipe wall of diffusion tube is to the inclination of outside, and tan (beta) 1/7-1/5.
Preferably, in the pressurized gas purification method, the second closed container is further provided with a plurality of flow guide plates, the lower surfaces of the flow guide plates are arc plates, the arc plates are provided with a plurality of arc grooves 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 adjacent arc grooves.
According to the technical scheme disclosed above, compared with the prior art, the invention has the following beneficial effects:
the invention provides a spray purification device and a spray purification method, wherein the spray purification device adopts a closed container, an inverted container and a plurality of pipelines with spray heads, the top of the closed container is provided with an air inlet, the lower part of the closed container is used as a water collecting tank, the bottom of the water collecting tank is provided with a first wastewater discharge valve, the inverted container is of an inverted U-shaped structure, the inverted container is coaxially arranged in the closed container, the top of the inverted container is provided with an air outlet, the bottom of the inverted container is provided with an opening, the inner wall of the closed container and the inner and outer walls of the inverted container are respectively provided with a plurality of pipelines with spray heads, and water in the water collecting tank is pumped to each spray head through a pressure pump. The atomizing head 23 humidifies the dust-laden pressurized gas, so that solid particles with the particle size of 2.5-10 mu m in the dust-laden pressurized gas are increased in weight when meeting water and are precipitated or the dust is dissolved in the water, and the aim of purifying the air is fulfilled.
In addition, because the inverted container is of an inverted U-shaped structure and is coaxially arranged in the closed container, the top of the closed container is provided with the air inlet, and the top of the first inverted container is provided with the air outlet, the inverted container with the inverted U-shaped structure is coaxially arranged in the closed container, so that the structure is more compact, the required occupied area is smaller, the speed reduction efficiency is higher, the through-flow section of the inverted container is more than or equal to that of a channel between the closed container and the inverted container, and the defect of secondary acceleration caused by the fact that the through-flow section of an air flow channel is reduced from the size is overcome.
In addition, because the cross sections of the inverted container and the closed container are circular, the distance from the outer wall of the inverted container to the inner wall of the closed container is equal, the upper part of the inverted container is in a convex arc shape, and the cross section of the upper part of the inverted container is gradually enlarged from top to bottom.
Drawings
Fig. 1 is a schematic structural diagram of a spray purification apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram of the gravity type precipitation apparatus and the spray purification apparatus according to the third embodiment of the present invention
Fig. 3 is a schematic structural diagram of a gravity type settling device according to a third embodiment of the present invention.
Fig. 4 is a schematic structural view of a gravity spring automatic opening/closing cover according to a third embodiment of the present invention.
Fig. 5 is a schematic connection diagram of a gravity type precipitation device, a spray purification device and a liquid dust removal mixing device in the fourth embodiment of the present invention.
Fig. 6 is a schematic structural view of a spray purification apparatus in a fourth embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a liquid dedusting and mixing device in a fourth embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a liquid-gas combiner in the fourth embodiment of the present invention.
Fig. 9 is a schematic structural view of a baffle in a fourth embodiment of the present invention.
In the figure: 1-gravity type precipitation device, 11-first closed container, 112-first gas inlet, 113-precipitation residual material recovery port, 12-first inverted container, 121-first gas outlet, 2-spray purification device, 21-closed container, 211-gas inlet, 22-inverted container, 221-gas outlet, 23-spray head, 24-first waste water discharge valve, 25-gas outlet valve, 26-pressure pump, 27-bell mouth type filter screen, 28-high pressure flushing spray head, 3-liquid dust removal mixing device, 31-second closed container, 32-liquid-gas combiner, 321-liquid inlet pipe, 322-gas suction pipe, 323-liquid-gas mixing pipe, 324-diffusion pipe, 325-gas inlet pipe, 33-second waste water discharge valve, 34-exhaust valve, 35-filter screen, 36-guide plate, 361-arc groove, 37-liquid booster pump, 38-liquid injection pipe, 4-first pipeline, 5-second pipeline, 6-gravity type spring automatic open-close cover, 61-anchor ear, 62-cover plate, 621-convex elastic bulge, 63-cover hook, 631-concave elastic groove, 64-first spring hinge and 65-second spring hinge.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments. 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, the embodiment provides a spray purification apparatus, which includes a closed container 21, an inverted container 22, and a plurality of pipes with spray heads 23, wherein the top of the closed container 21 is provided with an air inlet 211, the lower portion of the 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 inverted container is of an inverted U-shaped structure, the inverted container 22 is coaxially disposed in the closed container 21, the cross sections of the inverted container 22 and the closed container 21 are circular, the top of the inverted container 22 is provided with an air outlet 221, the bottom of the inverted container 22 is open, a gas to be treated with dust and pressure, i.e., a gas to be treated, enters the closed container 21 through the air inlet 211, and flows into the inverted container 22 from the bottom of the inverted container 22 after passing through a passage between the closed container 21 and the inverted container 22, and finally, the water flows out through an air outlet 221, a plurality of pipelines with the spray heads 23 are respectively arranged on the inner wall of the closed container 21 and the inner wall and the outer wall of the inverted container 22, and the water in the collecting tank is pumped to each spray head 23 through a pressure pump 26. The spray purification device 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 humidify the 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, thereby achieving the purpose of purifying the air.
Preferably, in the spray purification apparatus, the exhaust port 221 is externally connected with an exhaust valve 25 for exhausting purified gas.
In addition, because the cross sections of the inverted container 22 and the closed container 21 are circular, the distance from the outer wall of the inverted container 22 to the inner wall of the closed container 21 is equal, the upper part of the inverted container 22 is in a convex arc shape, and the cross section of the upper part of the inverted container 22 is gradually enlarged from top to bottom, by adopting the structure, the gas can flow along the streamline channel between the closed container 21 and the inverted container 22, and the vortex and the turbulent resistance at the internal corner part can not be generated.
The distance between the vertical central axis of the inverted container 22 and the side wall of the inverted container is 0.71-0.8 of the distance between the vertical central axis of the inverted container 22 and the side wall of the closed container 21, and the distance between the bottom of the inverted container 22 and the liquid level maximum allowable height line of the closed container 21 is greater than or equal to the distance between the side wall of the inverted container 22 and the side wall of the closed container 21. The gas to be treated enters the closed container 21 through the gas inlet 211 and moves downwards along a channel between the closed container 21 and the inverted container 22, and then flows into the inverted container 22 from the bottom opening of the inverted container 22, so that the dust-laden pressurized gas is subjected to spray humidification treatment while expanding and decelerating, solid particles in the dust-laden pressurized gas are dissolved in water or precipitate after increasing weight when meeting water, and the purpose of purifying air is achieved.
Preferably, in the above-described spray purification apparatus, a water injection pipe (not shown) is provided on a side wall of the closed vessel 21, the water injection pipe is positioned above a maximum allowable liquid level line of the closed vessel 21, an overflow pipe (not shown) is externally connected to the side wall of the closed vessel 21 at a position corresponding to the maximum allowable liquid level line of the closed vessel 21, and a check valve is provided on the overflow pipe.
Preferably, in the above-mentioned spray purification apparatus, a bell mouth filter screen is provided in the closed container 21, a small end of the bell mouth filter screen 27 is installed at the bottom of the closed container 21 and surrounds the outside of the bottom water outlet of the closed container 21, a large end of the bell mouth filter screen 27 is installed at the inner side of the side wall of the closed container 21, and the pressure pump 26 is provided at the lower side of the bell mouth 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 spray purification apparatus, a plurality of high-pressure washing nozzles 28 for washing the bell-mouth-shaped filter screen are uniformly arranged on the side wall of the closed container 21 along the same horizontal height, and the direction of the high-pressure washing nozzles 28 can be adjusted, that is, the angle of the included angle α between the axis (spraying direction) of the high-pressure washing nozzles and the side wall of the 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.
Carry out two
With reference to fig. 1, the present embodiment provides a method for purifying pressurized gas, which uses a spray purification apparatus according to an embodiment to spray pressurized gas to make solid particles in the gas dissolve in water or precipitate by increasing weight when meeting water, the method includes the following steps:
the dust-carrying pressurized gas enters a channel between the closed container 21 and the inverted container 22 through a gas inlet 211 at the top of the inverted container 22;
the dust-carrying pressurized gas flows from top to bottom in a channel between the closed container 21 and the inverted container 22, and pipelines arranged on the outer wall of the closed container 21 and the inner wall of the inverted container 22 spray and humidify the flowing dust-carrying pressurized gas through corresponding spray heads 23;
the pressurized gas with dust flows down to the bottom of the inverted container 22, then flows into the closed container 21 by bypassing the bottom of the side wall of the inverted container 22, and then flows from bottom to top in the closed container 21, and the pressurized gas with dust flowing through the pipe provided on the inner wall of the closed container 21 is subjected to secondary spray humidification processing by the corresponding spray head 23.
Preferably, in the method for purifying a pressurized gas, the pressure of the pressurized gas with dust is 0.05 to 0.3 MPa.
EXAMPLE III
Referring to fig. 2 to fig. 3, the difference between the pressurized gas purification method provided in the third embodiment and the second embodiment is that before the pressurized gas of dust, i.e. the gas to be treated, is treated by the spray purification device 2, the gravity type precipitation device 1 expands the volume and reduces the velocity of the gas to be treated, so as to precipitate the solid particles with the particle size of 10 to 100 μm in the gas, and the gravity type precipitation device 1 is hermetically connected to the spray purification device 2 through the first pipeline 4.
Preferably, in the above spray purification apparatus, the gravity type precipitation apparatus 1 includes a first closed container 11 and a first inverted container 12, a first gas inlet 112 is formed in a top portion of the first closed container 11, a precipitation residue recovery port 113 is formed in a bottom portion 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, cross sections of the first inverted container 12 and the first closed container are circular, a first gas outlet 121 externally connected with the first pipeline 4 is formed in a top portion of the first inverted container 12, a bottom opening of the first inverted container 12 is disposed, a gas to be processed enters the first closed container 11 through the first gas inlet 112, and flows into the first inverted container 12 from the bottom opening of the first inverted container 12 after passing through a passage between the first closed container 11 and the first inverted container 12, and finally flows out through a first air outlet 121, 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, the cross section of the upper part of the first inverted container 12 is gradually enlarged from top to bottom, the channel between the first closed container 11 and the first inverted container 12 is used as a primary expansion chamber, the inner space of the first inverted container 12 is an inverted secondary expansion chamber, the pneumatic structural layout of the primary expansion chamber and the inverted secondary expansion chamber adopts a built-in design, the first inverted container 12 in an inverted U-shaped structure is coaxially arranged in the first closed container 11, the channel between the first closed container 11 and the first inverted container 12 is used as a primary expansion chamber, and the inner space of the first inverted container 12 is an inverted secondary expansion chamber, under the condition of realizing the same expansion volume, the integral structure of the gravity type sedimentation device 1 can be more compact, the required occupied area is smaller, the speed reduction efficiency is higher, and the through-flow section of the first inverted container 12 is more than or equal to that of the channel between the first closed container 11 and the first inverted container 12, so that the defect of secondary acceleration caused by the fact that the through-flow section of the air flow channel is reduced from the size is avoided. The gravity type precipitation device 1 with the structure can reduce 50% of total solid particles mainly aiming at the solid particles with the particle size of 10-100 microns, 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 expansion and speed reduction of gas with dust pressure are realized, namely, the gas flow velocity is reduced by expanding the volume, the flow velocity kinetic energy of dust particles is further reduced, the solid particles with the particle size of 10-100 microns cannot continuously enter the spray purification device 2 after the kinetic energy is reduced, and the solid particles are precipitated 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 spray purification apparatus, a distance between the vertical central axis of the first inverted container 12 and the 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 the side wall of the first closed container 11, and a distance between the bottom of the first inverted container 12 and the maximum allowable stacking height line of the settled residues in the first closed container 11 is greater than or equal to the 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 spray purification apparatus, the bottom of the first closed container 11 is a funnel structure, a small end of the funnel structure is used as the residual precipitation material recovery port 113, the residual precipitation material recovery port 113 is provided with the gravity type automatic spring opening and closing cover 6, the gravity type automatic spring 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, the opposite sides of the anchor ear 61 are respectively provided with a first ear plate and a second ear plate, 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-fit manner, the upper portion of the other end of the cover plate 62 is provided with a convex elastic protrusion 621, 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 projection 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 a designed value, the cover plate 62 is automatically opened, and when the weight of the deposited dust on the cover plate 62 is less than the designed value, the cover plate 62 is automatically closed. 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.
In summary, according to the spray purification device and method provided by the present invention, the gravity type precipitation device 1 is adopted to perform volume expansion and speed reduction on the dust pressurized gas to precipitate solid particles with a particle size of 10 to 100 μm in the gas, so that 50% of the total solid particles can be reduced; the dust pressurized gas is sprayed by the spray purification device 2, so that solid particles with the particle size of 2.5-10 microns in the gas are dissolved in water or precipitate 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 manner is achieved.
Example four
Referring to fig. 5 to 9 in combination with fig. 1 to 4, the difference between the present embodiment and the third embodiment is: the gas treated by the spray purification device 2 is further subjected to liquid-gas combined purification treatment through a liquid dust removal mixing device 3 bin, so that solid particles in the gas are further dissolved in the liquid, the spray purification device 2 is hermetically connected with the liquid dust removal mixing device 3 through a second pipeline 5, that is, the exhaust port 221 is not externally connected with an exhaust valve 25 for discharging purified gas, but is hermetically connected with the liquid dust removal mixing device 3 through the second pipeline 5, that is, the spray purification device 2 is hermetically connected with the liquid dust removal mixing device 3 through the second pipeline 5.
The liquid dedusting and mixing device 3 includes a second 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 provided at the bottom of the second closed container 31, an exhaust valve 34 is provided at the top of the second closed container 31, a liquid injection pipe 38 is provided at the upper portion of the sidewall of the second closed container 31, the liquid-gas combiner 32 is provided in the second closed container 31, the liquid-gas combiner 32 includes 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 that are coaxially connected in sequence, a free end of the liquid inlet pipe 321 is a liquid inlet, a filter screen 35 is provided at the outer side of the liquid inlet to filter the liquid entering the liquid-gas combiner 32, a liquid booster pump 37 is provided on the liquid inlet pipe 321, a free end of the diffusion pipe 324 is a liquid-gas discharge port, one end of the air inlet pipe 325 is connected to the sidewall of the air suction pipe 322, the other end of the air inlet pipe 325 is connected with the second pipeline 5. The liquid dedusting and mixing device 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, and 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 fused with water by water and gas, so that 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 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 to 1.5 ═ V1 ═ pi × d1 × d1, (1.5 to 1.75) × d1, d3 ═ 1.118 to 1.225 d1, where 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 4m/s to 5m/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 amount of gas sucked is maximized.
Preferably, in the above purification apparatus for the pressure gas with dust, 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 liquid and gas and the kinetic energy loss of fluid can be optimally matched.
Preferably, in the above purification apparatus for a dust-laden pressurized gas, the diffuser pipe 324 is a trumpet-shaped pipe section, the pipe diameter of the diffuser pipe 324 gradually increases from inside to outside, the length L4 of the diffuser pipe is 1 to 1.5 times the pipe diameter d1 of the liquid-gas mixture pipe 323, the pipe wall of the diffuser pipe 324 has an outward inclination angle β, and tan (β) is 1/7 to 1/5, so that the discharge direction and discharge amount of the liquid-gas mixture gas can be optimally matched.
Preferably, in the above purification apparatus for a dust-containing pressurized gas, the second 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 pressure gas provided by the invention, the gravity type precipitation device 1 is adopted to perform volume expansion and speed reduction on the dust-laden pressure 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 dust pressurized gas is sprayed by the spray purification device 2, so that solid particles with the particle size of 2.5-10 mu m in the gas are dissolved in water or precipitate by increasing the weight when meeting water, and the total solid particles can be reduced by 30%; by adopting the liquid dust removal mixing device 3 to carry out liquid-gas combination treatment on the dust pressurized gas, solid particles with the particle size of less than 2.5 microns in the gas are further dissolved in the liquid, and 10 percent of the total solid particles can be reduced, thereby achieving the effect of simply, conveniently, efficiently and hierarchically purifying the dust pressurized gas.
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 (9)
1. A spray purification device, comprising: a closed container, an inverted container and a plurality of pipelines with spray heads, wherein the top of the closed container is provided with an air inlet, the lower part of the closed container is used as a water collecting tank, the bottom of the water collecting tank is provided with a first wastewater discharge valve, the inverted container is of an inverted U-shaped structure, the inverted container is coaxially arranged in the closed container, the top of the inverted container is provided with an air outlet, the exhaust port discharges gas through a pipeline penetrating through the side wall of the closed container, the bottom of the inverted container is provided with an opening, the inner wall of the closed container and the inner wall and the outer wall of the inverted container are respectively provided with a plurality of pipelines with spray heads, water in the water collecting tank is pumped to each spray head by a pressure pump, the through-flow section of the inverted container is larger than or equal to that of a passage between the closed container and the inverted container.
2. The spray purification apparatus of claim 1, wherein the distance from the outer wall of the inverted container to the inner wall of the closed container is equal.
3. The spray purification apparatus of claim 2, wherein the inverted container and the closed container have a circular cross section, the upper portion of the inverted container has a convex arc shape, and the cross section of the upper portion of the inverted container is enlarged from top to bottom.
4. The spray purification apparatus of claim 1, wherein the exhaust port is externally connected to an exhaust valve for exhausting purified gas.
5. The spray purification apparatus of claim 1, wherein the distance between the bottom of the inverted container and the line of the maximum allowable liquid level of the closed container is greater than or equal to the distance between the side wall of the inverted container and the side wall of the closed container.
6. The spray purification device according to claim 1, wherein a water injection pipe is provided on a side wall of the closed container, the water injection pipe is located above a maximum allowable height line of the liquid level of the closed container, an overflow pipe is externally connected to the side wall of the closed container at a position corresponding to the maximum allowable height line of the liquid level of the closed container, and a check valve is provided on the overflow pipe.
7. The spray purification device according to claim 1, wherein a bell mouth filter screen is arranged in the closed container, a small end of the bell mouth filter screen is installed at the bottom of the closed container and surrounds the outer side of a bottom water outlet of the closed container, a large end of the bell mouth filter screen is installed at the inner side of the side wall of the closed container, and the pressure pump is arranged at the lower side of the bell mouth filter screen.
8. The spray purification device according to claim 7, wherein a plurality of high-pressure washing nozzles for washing the bell-mouth-shaped filter screen are uniformly arranged on the side wall of the closed container along the same horizontal height, and the direction of the high-pressure washing nozzles can be adjusted.
9. A pressurized gas purification method, wherein the pressurized gas of dust is sprayed by the spray purification device according to any one of claims 1 to 8 to dissolve solid particles in the gas in water or precipitate solid particles by weight increase in water, the method comprising the steps of:
the dust-carrying pressurized gas enters a channel between the closed container and the inverted container through a gas inlet at the top of the inverted container;
the dust-carrying pressure gas flows from top to bottom in a channel between the closed container and the inverted container, and pipelines arranged on the outer wall of the closed container and the inner wall of the inverted container carry out spraying humidification treatment on the dust-carrying pressure gas flowing through corresponding spraying heads;
the dust-carrying pressure gas flows downwards to the bottom of the inverted container, then flows into the closed container from bottom to top after bypassing the bottom of the side wall of the inverted container, and then is subjected to secondary spray humidification treatment on the dust-carrying pressure gas flowing through the pipeline arranged on the inner wall of the closed container through the corresponding spray head.
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