CN111715000A - Purification method for airflow with dust - Google Patents
Purification method for airflow with dust Download PDFInfo
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- CN111715000A CN111715000A CN202010545303.7A CN202010545303A CN111715000A CN 111715000 A CN111715000 A CN 111715000A CN 202010545303 A CN202010545303 A CN 202010545303A CN 111715000 A CN111715000 A CN 111715000A
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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
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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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
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
- B01D47/021—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath by bubbling the gas through a liquid bath
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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
- B01D50/60—Combinations of devices covered by groups B01D46/00 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention belongs to the field of air purification, particularly relates to purification treatment of gas with dust, and discloses a purification method for gas flow with dust, which comprises the following steps of firstly, collecting and pressurizing air to be dusted to form gas flow with dust; then, the airflow processed in the first step is subjected to spray humidification treatment, so that solid particles in the airflow are dissolved in water or added with water to increase weight and precipitate; and finally, carrying out water-gas combination treatment on the airflow treated in the step two to further dissolve solid particles in the airflow into water, thereby achieving the effect of simply, conveniently, efficiently and hierarchically purifying the airflow with dust.
Description
Technical Field
The invention belongs to the field of air purification, and particularly relates to a purification method for airflow with dust.
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 air with dust discharged from cement silo, mortar silo, etc. in construction site is polluted in 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 purification method for the dust-carrying airflow 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 purification method for airflow with dust, which collects and pressurizes air to be dusted to form the airflow with dust; then, the air flow is sprayed and humidified, so that solid particles in the air flow are dissolved in water or added with water to increase weight and precipitate; the gas flow is subjected to water-gas combination treatment, so that solid particles in the gas flow are further dissolved in water, and the effect of purifying the gas flow with dust in a grading manner, simply and efficiently is achieved.
In order to solve the technical problems, the invention provides the following technical scheme:
a method for cleaning a dusty gas stream, comprising the steps of:
collecting and pressurizing air to be dusted to form airflow with dust;
step two, carrying out spray humidification treatment on the airflow treated in the step one to enable solid particles in the airflow to be dissolved in water or to be added with weight when meeting water to precipitate;
and step three, carrying out water-gas combination treatment on the gas flow treated in the step two to further dissolve solid particles in the gas flow into water.
Preferably, in the above-mentioned purification method for dust-carrying air current, step one is to treat dust-carrying air through fan pressure boost storehouse and collect and pressurize and form dust-carrying air current, fan pressure boost storehouse includes the storehouse body, fan and filter screen, the upper portion of one side of the storehouse body is equipped with first air inlet, the opposite side of the storehouse body leans on lower part department and is equipped with first gas outlet, the fan set up in the airflow channel of the storehouse body, the first gas inlet of airflow channel UNICOM and first gas outlet, just the fan is close to first air inlet setting, the filter screen sets up in first gas inlet department, and the bore of first gas outlet is less than the bore of first gas inlet.
Preferably, in the above purification method for the air flow with dust, the air flow processed in the first step is subjected to spray humidification treatment through a spray purification bin, the spray purification bin comprises a first closed container, a first inverted container and a plurality of pipelines with spray heads, a second air inlet externally connected with a first pipeline is formed in the top of the first closed container, the lower part of the first closed container is used as a water collecting tank, a first wastewater discharge valve is formed in the bottom of the water collecting tank, the first inverted container is coaxially arranged in the first closed container, a second air outlet is formed in the top of the first inverted container, an opening is formed in the bottom of the first inverted container, the air flow processed by the fan pressurization bin enters the first closed container through the second air inlet, and after passing through a channel between the first closed container and the first inverted container, the water flows into the first inverted container from the bottom opening of the first inverted container and finally flows out from the second air outlet, a plurality of pipelines with spray heads are respectively arranged on the inner wall of the first closed container and the inner wall and the outer wall of the first inverted container, and the water in the water collecting tank is pumped to each spray head through a pressure pump.
Preferably, in the above purification method for the gas flow with dust, the flow cross section of the first inverted container is greater than or equal to the flow cross section of a passage between the first closed container and the first inverted container, the distance between the bottom of the first inverted container and the highest allowable height line of the liquid level of 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, the distances between the outer wall of the first inverted container and the inner wall of the first closed container are equal, the cross sections of the first inverted container and the first closed container are circular, the upper portion of the first inverted container is in a convex arc shape, and the cross section of the upper portion of the first inverted container is gradually enlarged from top to bottom.
Preferably, in foretell a purification method for taking dust air current, be equipped with horn mouth type filter screen in the first airtight container, the osculum end of horn mouth type filter screen is installed in the bottom of first airtight container and is enclosed the outside of locating first airtight container's bottom delivery port, the macrostoma end of horn mouth type filter screen is installed in first airtight container's lateral wall 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 first airtight container's the lateral wall, high pressure washing terminals's direction can be adjusted.
Preferably, in the purification method for the gas flow with dust, the gas flow processed in the second step is subjected to water-gas combination treatment in the third step, so that dust in the gas flow is further dissolved in water, the water dedusting mixing bin comprises a second closed container and a first water-gas combiner, the second closed container is provided with a second waste water discharge valve at the bottom, an exhaust valve is arranged at the top of the second closed container, the first water-gas combiner is arranged in the second closed container, the first water-gas combiner comprises a gas inlet pipe, and a gas inlet pipe, a gas suction pipe, a water-gas mixing pipe and a diffusion pipe which are sequentially connected, the free end of the gas inlet pipe is a liquid inlet, a liquid booster pump is arranged on the gas inlet pipe, the free end of the diffusion pipe is a water-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 above-mentioned purification method for a dust-laden gas flow, the first water-gas combiner satisfies the following relationship:
q3 (1.25-1.5) × V1 × 1/4 × pi × d1 × d1, d2 (1.5-1.75) × d1, d3 (1.118-1.225) × d1, wherein Q3 is the flow rate of gas in the first gas inlet pipe, V1 is the flow rate of liquid in the first gas inlet pipe, d1 is the pipe diameter of the first gas inlet pipe, d2 is the pipe diameter of the first gas-liquid mixing pipe, and d3 is the pipe diameter of the first gas inlet pipe.
Preferably, in the above purification method for the airflow with dust, the pipe diameter of the air suction pipe is gradually increased from the liquid inlet pipe to the water-air 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.
Preferably, in the above purification method for the airflow with dust, the water-gas mixing pipe is a linear pipe section, the length of the water-gas mixing pipe is at least 7 times of the pipe diameter of the water-gas mixing pipe, the pipe diameter of the water-gas mixing pipe is 1 to 2 times of the pipe diameter of the liquid inlet pipe, the diffuser pipe is a trumpet-shaped pipe section, the pipe diameter of the diffuser pipe is gradually increased from inside to outside, the length of the diffuser pipe is 1 to 1.5 times of the pipe diameter of the water-gas mixing pipe, the outward inclination angle of the pipe wall of the diffuser pipe is a, and tan (a) is 1/7 to 1/5.
Preferably, in the above purification method for airflow with dust, a plurality of guide plates are further arranged in the second closed container, the lower surfaces of the guide plates are arc plates, a plurality of arc grooves are equidistantly arranged on the arc plates, 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 invention provides a purification method for airflow with dust, which comprises the following steps of firstly, collecting and pressurizing air to be dusted to form the airflow with dust; then, the airflow processed in the first step is subjected to spray humidification treatment, so that solid particles in the airflow are dissolved in water or added with water to increase weight and precipitate; and finally, carrying out water-gas combination treatment on the airflow treated in the step two to further dissolve solid particles in the airflow into water, thereby achieving the effect of simply, conveniently, efficiently and hierarchically purifying the airflow with dust.
Drawings
Fig. 1 is a schematic connection diagram of a blower fan pressurizing bin, a spray purifying bin and a water dedusting mixing bin in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a blower plenum chamber according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a spray purification bin according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a water dedusting mixing bin according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a first water-gas combiner in an embodiment of the invention.
Fig. 6 is a schematic structural diagram of a baffle in an embodiment of the invention.
In the figure: 1-blower supercharging bin, 11-bin body, 111-first air inlet, 112-first air outlet, 12-blower, 13-filter screen, 2-spray purifying bin, 21-first closed container, 211-second air inlet, 22-first inverted container, 221-second air outlet, 23-spray head, 24-first waste water discharge valve, 3-water dedusting mixing bin, 31-second closed container, 32-first water-gas combiner, 321-liquid inlet pipe, 322-air suction pipe, 323-water-gas mixing pipe, 324-diffusion pipe, 325-air inlet pipe, 33-second waste water discharge valve, 34-liquid booster pump, 35-filter screen, 36-guide plate, 361-circular arc groove, 37-liquid injection exhaust valve, 38-first air outlet pipe, 4-the first pipeline, 5-the second pipeline.
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.
Referring to fig. 1 to 6, the present embodiment discloses a method for purifying a dust-laden airflow, including the following steps:
collecting and pressurizing air to be dusted to form airflow with dust;
step two, carrying out spray humidification treatment on the airflow treated in the step one to enable solid particles in the airflow to be dissolved in water or to be added with weight when meeting water to precipitate;
and step three, carrying out water-gas combination treatment on the gas flow treated in the step two to further dissolve solid particles in the gas flow into water.
The invention provides a purification method for airflow with dust, which comprises the following steps: collecting and pressurizing air to be dusted to form airflow with dust; then, the airflow processed in the first step is subjected to spray humidification treatment, so that solid particles in the airflow are dissolved in water or added with water to increase weight and precipitate; and finally, carrying out water-gas combination treatment on the airflow treated in the step two to further dissolve solid particles in the airflow into water, thereby achieving the effect of simply, conveniently, efficiently and hierarchically purifying the airflow with dust.
Preferably, in the above-mentioned purification method for airflow with dust, in the first step, the first fan pressurizing bin 1 is used for collecting and pressurizing the air to be subjected to dust to form the airflow with dust, the fan pressurizing bin 1 includes the bin body 11, the fan 12 and the filter screen 13, the first air inlet 111 is arranged on the upper portion of one side of the bin body 11, the first air outlet 112 is arranged on the lower portion of the other side of the bin body 11, the fan 12 is arranged in the airflow channel of the bin body 11, the first air inlet 111 and the first air outlet 112 are communicated with the airflow channel, the fan 12 is arranged near the first air inlet 111, the filter screen 13 is arranged at the first air inlet 111, and the caliber of the first air outlet 112 is smaller than that of the first air inlet 111.
Preferably, in the above-mentioned purification method for the gas flow with dust, the gas flow processed in the first step is subjected to spray humidification treatment through a spray purification bin 2, the spray purification bin 2 includes a first closed container 21, a first inverted container 22 and a plurality of pipelines with spray heads 23, a second gas inlet 211 externally connected with a first pipeline 4 is formed at the top of the first closed container 21, the lower part of the first closed container 21 serves as a water collecting tank, a first wastewater discharge valve 24 is formed at the bottom of the water collecting tank, the first inverted container 22 is coaxially arranged in the first closed container 21, a second gas outlet 221 is formed at the top of the first inverted container 22, an opening is formed at the bottom of the first inverted container 22, the gas processed by the fan pressurization bin 1 enters the first closed container 21 through the second gas inlet 211, and passes through a channel between the first closed container 21 and the first inverted container 22, flows into the first inverted container 22 from the bottom opening of the first 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 first closed container 21 and the inner wall and the outer wall of the first inverted container 22, and water in the collecting tank is pumped to each spray nozzle 23 through a pressure pump. According to the invention, the first inverted container 22 with the inverted U-shaped structure is coaxially arranged in the first closed container 21, a channel between the first closed container 21 and the first inverted container 22 is used as a first-stage expansion spraying chamber, the inner space of the first inverted container 12 is a second-stage expansion spraying chamber, under the condition of realizing the same expansion spraying space, the whole structure of the spray purification bin 2 can be more compact, the required occupied area is smaller, and the speed reduction efficiency is higher, the spray purification bin 2 with the structure can mainly reduce 30% of total solid particles aiming at the solid particles with the particle size of 2.5-10 mu m, and the dust-carrying air is humidified by the spray head 23, so that the solid particles with the particle size of 2.5-10 mu m in the dust-carrying air can be precipitated or dissolved in water by increasing the weight of water, and the purpose of purifying the air is achieved
In order to make the dusty air flow smoother, it is preferable that the through-flow cross section of the first inverted container 22 is equal to or greater than the through-flow cross section of the passage between the first closed container 21 and the first inverted container 22. The 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 the distance between the vertical central axis of the first inverted container 22 and the side wall of the first closed container 21, and the distance between the bottom of the first inverted container 22 and the highest allowable height line of the liquid level in the first closed container 21 is greater than or equal to the distance between the side wall of the first inverted container 22 and the side wall of the first closed container 21. The gas to be treated enters the first closed container 21 through the second gas inlet 211, moves downwards along a channel between the first closed container 21 and the first inverted container 22, then flows into the first inverted container 22 from the bottom opening of the first inverted container 22, the first inverted container 22 in the inverted U-shaped structure is coaxially arranged in the first closed container 21, the channel between the first closed container 21 and the first inverted container 22 is used as a primary expansion spray chamber, the internal space of the first inverted container 12 is a secondary expansion spray chamber, under the condition of realizing the same expansion spray space, the whole structure of the spray purification bin 2 can be more compact, the occupied area is smaller, the speed reduction efficiency is higher, the spray purification bin 2 in 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, the air with dust is humidified by the spray head 23, so that solid particles with the particle size of 2.5-10 microns in the air with dust 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. .
Preferably, the distance from the outer wall of the first inverted container 22 to the inner wall of the first closed container 21 is equal, the upper portion of the first inverted container 22 is in a convex arc shape, and the cross section of the upper portion of the first inverted container 22 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, a water injection pipe (not shown) is disposed on a side wall of the first closed container 21, the water injection pipe is located above a maximum allowable height line of a liquid level of the first closed container 21, a first overflow pipe (not shown) is externally connected to a position, corresponding to the maximum allowable height line of the liquid level of the first closed container 21, on the side wall of the first closed container 21, and a first check valve is disposed on the first overflow pipe.
Preferably, be equipped with horn mouth type filter screen in first airtight container 21, the osculum end of horn mouth type filter screen 27 is installed in the bottom of first airtight container 21 and is enclosed the outside of locating the bottom delivery port of first airtight container 21, the macrostoma end of horn mouth type filter screen 27 is installed in the lateral wall of first airtight container 21 inboard, force pump 26 sets up in the downside of horn mouth type 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, evenly set up a plurality of high pressure washing terminals 28 that are used for washing the horn mouth type filter screen along same level on the lateral wall of first closed container 21, high pressure washing terminals 28's direction can be adjusted, and the angle size of contained angle alpha between axis (the direction of injection) and the lateral wall of first closed container 21 of high pressure washing terminals promptly 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.
Preferably, in the above-mentioned purification method for the gas flow with dust, the gas flow processed in the second step is subjected to a water-gas combination treatment in the third step, so that dust in the gas flow is further dissolved in water, the water dust removal mixing bin 3 includes a second closed container 31 provided with liquid (in this embodiment, the liquid is water) and a first water-gas combiner 32, a second waste water discharge valve 33 is provided at the bottom of the second closed container 31, an exhaust valve 37 is provided at the top of the second closed container 31, the first water-gas combiner 32 is provided in the second closed container 31, the first water-gas combiner 32 includes a gas inlet pipe 325 and a liquid inlet pipe 321, a gas inlet pipe 322, a water-gas mixing pipe 323 and a diffusion pipe 324 which are connected in sequence, a free end of the liquid inlet pipe 321 is a liquid inlet, a filter screen 35 is provided outside the liquid inlet to filter the liquid entering the first water-gas combiner 32, the liquid inlet pipe 321 is provided with a liquid booster pump 34, the free end of the diffusion pipe 324 is a water vapor discharge port, 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 water dedusting mixing bin 3 with the structure can reduce 10% of total solid particles mainly aiming at the solid particles with the particle size smaller than 2.5 microns, so that dust-carrying airflow and liquid are fully mixed in the first water-gas combiner 32, in the embodiment, the liquid adopts water, the solid particles with the particle size smaller than 2.5 microns in the gas, namely PM 2.5-level micro particles, are fully fused with water through the first water-gas combiner 32, and PM 2.5-level dust and 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, so that not only can the dust pollution be reduced, but also the original water-soluble harmful substances in the air can be purified.
Preferably, a first liquid injection pipe 38 is disposed on a side wall of the second closed container 31, the first liquid injection pipe 38 is located above a maximum allowable height line of a liquid level of the second closed container 31, a second overflow pipe (not shown) is externally connected to a side wall of the second closed container 31 at a position corresponding to the maximum allowable height line of the liquid level of the second closed container 31, and a second one-way valve is disposed on the second overflow pipe.
In order to make the dust-carrying gas flow and the water merge more fully and effectively reduce the PM2.5 dust and the water-soluble harmful substances in the gas, it is preferable that, in the purification method for the dust-carrying gas flow, the first water-gas combiner 32 satisfies the following relationship:
q3 ═ 1.25 to 1.5 ═ V1 ═ pi × (1) × (1), d2 ═ 1.5 to 1.75 × (d 1), d3 ═ 1.118 to 1.225) d1, where Q3 is the flow rate of gas in the first gas inlet pipe 325, V1 is the flow rate of liquid in the first gas inlet pipe 321, V1 may take a value of 4 to 5m/s, d1 is the pipe diameter of the first gas inlet pipe 321, d2 is the pipe diameter of the first gas-liquid mixing pipe 323, and d3 is the pipe diameter of the first gas inlet pipe 325.
Preferably, in the above-mentioned purification method for the gas flow with dust, the pipe diameter of the gas suction pipe 322 gradually increases from the liquid inlet pipe 321 to the water-gas mixing pipe 323, the pipe wall of the gas suction pipe 322 presents an outwardly convex arc surface, 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 water-gas mixing pipe 323 and the diffuser pipe 324 are L1-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 gas suction amount of the gas suction pipe 322 and the pipe diameter and flow rate of the liquid inlet pipe 321 are optimally matched, and the gas suction amount efficacy is maximized.
Preferably, in the above purification method for the gas flow with dust, the water-gas mixing pipe 323 is a linear pipe section, the length L3 of the water-gas mixing pipe 323 is at least 7 times of the pipe diameter d2 of the water-gas mixing pipe 323, and the pipe diameter d2 of the water-gas mixing pipe 323 is 1-2 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-mentioned purification method for the gas flow 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 water-gas mixing pipe 323, the pipe wall of the diffuser 324 has an outward inclination angle a, and tan (a) is 1/7-1/5, so that the guidance and discharge amount of the water-gas mixture gas can be optimally matched.
Preferably, in the above purification method for the airflow with dust, the second closed container 21 is further provided with a plurality of guide plates 36, the lower surfaces of the 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 method for the airflow with dust provided by the invention, the fan pressurizing bin 1 is adopted to collect and pressurize the air to be subjected to dust treatment to form the airflow with dust; the spraying purification bin 2 is used for spraying the dust-carrying airflow to enable solid particles with the particle size of 2.5-10 microns in the airflow to be dissolved in water or to be precipitated by increasing the weight when meeting water, and the total solid particles can be reduced by 30%; by adopting the water dedusting mixing bin 3 to carry out water-gas combined treatment on the dust-carrying airflow, solid particles with the particle size of less than 2.5 mu m in the airflow are further dissolved in water, and 10 percent of the total solid particles can be reduced, thereby achieving the effect of purifying the dust-carrying airflow simply, conveniently, efficiently and in a grading way.
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 (10)
1. A method for cleaning a dusty gas stream, comprising the steps of:
collecting and pressurizing air to be dusted to form airflow with dust;
step two, carrying out spray humidification treatment on the airflow treated in the step one to enable solid particles in the airflow to be dissolved in water or to be added with weight when meeting water to precipitate;
and step three, carrying out water-gas combination treatment on the gas flow treated in the step two to further dissolve solid particles in the gas flow into water.
2. The method according to claim 1, wherein in the first step, the dust-laden air is collected and pressurized by a blower plenum chamber to form the dust-laden air, the blower plenum chamber comprises a chamber body, a blower and a filter screen, a first air inlet is disposed at an upper portion of one side of the chamber body, a first air outlet is disposed at a lower portion of the other side of the chamber body, the blower is disposed in an air flow channel of the chamber body, the air flow channel is communicated with the first air inlet and the first air outlet, the blower is disposed near the first air inlet, the filter screen is disposed at the first air inlet, and a diameter of the first air outlet is smaller than a diameter of the first air inlet.
3. The purification method for the gas flow with the dust as claimed in claim 1, wherein the second step is to perform the spray humidification treatment on the gas flow treated in the first step through a spray purification bin, the spray purification bin comprises a first closed container, a first inverted container and a plurality of pipelines with spray heads, the top of the first closed container is provided with a second gas inlet externally connected with a first pipeline, the lower part of the first 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 first inverted container is coaxially arranged in the first closed container, the top of the first inverted container is provided with a second gas outlet, the bottom of the first inverted container is provided with an opening, the gas treated by the fan pressurization bin enters the first closed container through the second gas inlet and passes through a channel between the first closed container and the first inverted container, the water flows into the first inverted container from the bottom opening of the first inverted container and finally flows out from the second air outlet, a plurality of pipelines with spray heads are respectively arranged on the inner wall of the first closed container and the inner wall and the outer wall of the first inverted container, and the water in the water collecting tank is pumped to each spray head through a pressure pump.
4. The purification method for a dusty gas stream according to claim 3, wherein the flow cross section of the first inverted container is equal to or greater than the flow cross section of the passage between the first closed container and the first inverted container, the distance between the bottom of the first inverted container and the highest allowable liquid level line of the first closed container is equal to or greater than the distance between the side wall of the first inverted container and the side wall of the first closed container, the distance between the outer wall of the first inverted container and the inner wall of the first closed container is equal, the cross sections of the first inverted container and the first closed container are circular, the upper portion of the first inverted container is convex arc-shaped, and the cross section of the upper portion of the first inverted container is gradually enlarged from top to bottom.
5. The purification method for airflow with dust according to claim 3, wherein a bell mouth-shaped filter screen is arranged in the first closed container, a small end of the bell mouth-shaped filter screen is installed at the bottom of the first closed container and surrounds the outside of the bottom water outlet of the first closed container, a large end of the bell mouth-shaped filter screen is installed inside the side wall of the first 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 first closed container along the same horizontal height, and the direction of the high-pressure flushing nozzles can be adjusted.
6. The method according to claim 1, wherein the third step is to perform a water-gas combination treatment on the gas flow treated in the second step to further dissolve the dust in the gas flow into water, the water dust removal mixing bin comprises a second closed container with liquid and a first water-gas combiner, a second waste water discharge valve is arranged at the bottom of the second closed container, an exhaust valve is arranged at the top of the second closed container, the first water-gas combiner is arranged in the second closed container, the first water-gas combiner comprises a gas inlet pipe and a liquid inlet pipe, a gas suction pipe, a water-gas mixing pipe and a diffusion pipe which are connected in sequence, the free end of the liquid inlet pipe is a liquid inlet, a liquid booster pump is arranged on the liquid inlet pipe, the free end of the diffusion pipe is a water-gas discharge outlet, 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.
7. The cleaning method for a dusty gas stream in accordance with claim 6,
the first water-gas combiner satisfies the following relationship:
q3 (1.25-1.5) × V1 × 1/4 × pi × d1 × d1, d2 (1.5-1.75) × d1, d3 (1.118-1.225) × d1, wherein Q3 is the flow rate of gas in the first gas inlet pipe, V1 is the flow rate of liquid in the first gas inlet pipe, d1 is the pipe diameter of the first gas inlet pipe, d2 is the pipe diameter of the first gas-liquid mixing pipe, and d3 is the pipe diameter of the first gas inlet pipe.
8. The method as claimed in claim 6, wherein the diameter of the air intake pipe is gradually increased from the liquid inlet pipe to the water-gas mixing pipe, and the 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 the diameter of the liquid inlet pipe.
9. The method according to claim 6, wherein the water-gas mixing pipe is a straight pipe section, the length of the water-gas mixing pipe is at least 7 times or more of the pipe diameter of the water-gas mixing pipe, the pipe diameter of the water-gas mixing pipe is 1-2 times of the pipe diameter of the liquid inlet pipe, the diffuser pipe is a flared pipe section, the pipe diameter of the diffuser pipe gradually increases from inside to outside, the length of the diffuser pipe is 1-1.5 times of the pipe diameter of the water-gas mixing pipe, the pipe wall of the diffuser pipe has an outward inclination angle a, and tan (a) is 1/7-1/5.
10. The method according to claim 6, wherein a plurality of flow deflectors are further arranged in the second closed container, the lower surfaces of the flow deflectors 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 adjacent arc grooves.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08103620A (en) * | 1994-10-07 | 1996-04-23 | Dainaka Seiki Kk | Dust collection treating device |
| RU59999U1 (en) * | 2006-08-25 | 2007-01-10 | Андрей Владимирович Перков | SELF-CLEANING FILTER |
| CN201776020U (en) * | 2010-07-28 | 2011-03-30 | 中国石油天然气股份有限公司 | Disassembly-free cleaning filter |
| CN102114375A (en) * | 2009-12-09 | 2011-07-06 | 有利创新科技有限公司 | Dust arrester and method for removing dust particles from air |
| KR20120013771A (en) * | 2010-08-06 | 2012-02-15 | 주식회사 포스코 | Wet-type dust collector having advanced purification performance |
| CN205252845U (en) * | 2015-12-15 | 2016-05-25 | 陆彩红 | Boiler tail gas processing apparatus |
| KR20160126703A (en) * | 2015-04-24 | 2016-11-02 | 주식회사 리드컴퍼니 | The device for deodorizing polluted air |
| CN206103574U (en) * | 2016-06-01 | 2017-04-19 | 中冶长天国际工程有限责任公司 | Water -bath deduster , lime slaking and dust collector |
| CN107952316A (en) * | 2016-10-17 | 2018-04-24 | 株式会社奥思伟 | Micronic dust remover without strainer |
| CN207493402U (en) * | 2017-11-21 | 2018-06-15 | 赵滨霞 | A kind of emission-control equipment |
| CN109331623A (en) * | 2018-06-05 | 2019-02-15 | 华北电力大学（保定） | A kind of smoke pollution of boiler object calcium method integration deep removal system based on preposition oxidation |
-
2020
- 2020-06-16 CN CN202010545303.7A patent/CN111715000B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08103620A (en) * | 1994-10-07 | 1996-04-23 | Dainaka Seiki Kk | Dust collection treating device |
| RU59999U1 (en) * | 2006-08-25 | 2007-01-10 | Андрей Владимирович Перков | SELF-CLEANING FILTER |
| CN102114375A (en) * | 2009-12-09 | 2011-07-06 | 有利创新科技有限公司 | Dust arrester and method for removing dust particles from air |
| CN201776020U (en) * | 2010-07-28 | 2011-03-30 | 中国石油天然气股份有限公司 | Disassembly-free cleaning filter |
| KR20120013771A (en) * | 2010-08-06 | 2012-02-15 | 주식회사 포스코 | Wet-type dust collector having advanced purification performance |
| KR20160126703A (en) * | 2015-04-24 | 2016-11-02 | 주식회사 리드컴퍼니 | The device for deodorizing polluted air |
| CN205252845U (en) * | 2015-12-15 | 2016-05-25 | 陆彩红 | Boiler tail gas processing apparatus |
| CN206103574U (en) * | 2016-06-01 | 2017-04-19 | 中冶长天国际工程有限责任公司 | Water -bath deduster , lime slaking and dust collector |
| CN107952316A (en) * | 2016-10-17 | 2018-04-24 | 株式会社奥思伟 | Micronic dust remover without strainer |
| CN207493402U (en) * | 2017-11-21 | 2018-06-15 | 赵滨霞 | A kind of emission-control equipment |
| CN109331623A (en) * | 2018-06-05 | 2019-02-15 | 华北电力大学（保定） | A kind of smoke pollution of boiler object calcium method integration deep removal system based on preposition oxidation |
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