A secondary spray wet dust removal device

Abstract

The present invention relates to the technical field of industrial dust removal, and particularly relates to a two-stage spray wet dust removal device. The dust removal device includes an outer barrel, an upper barrel disposed at the upper end of the outer barrel, an inner barrel disposed inside the outer barrel and communicating with the bottom end inside the outer barrel, a first spray device disposed between the outer barrel and the inner barrel, a second spray device disposed inside the inner barrel, and a negative pressure component disposed inside the upper barrel. The upper barrel communicates with the upper end of the inner barrel. The first spray device is used to spray water mist between the outer barrel and the inner barrel, the second spray device is used to spray water mist into the inner barrel, and the negative pressure component includes an impeller. The impeller is used to form a negative pressure at the upper end of the inner barrel relative to the lower end and is used to strike dust. The purpose of the present invention is to provide a two-stage spray wet dust removal device, which can effectively remove dust of different sizes by performing two-stage dust removal on the dust-containing gas, thereby improving the dust removal efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial dust removal, and particularly relates to a two-stage spray wet dust removal device. Background Art

[0002] The current wet dust collector is commonly known as a "demister". It makes the dust-containing gas come into close contact with a liquid (usually water), and uses the inertial collision of water droplets and particles or the full mixing effect of water and dust and other effects to capture particles or make the particles larger or stay in a fixed container to achieve the separation effect of water and dust. The wet dust collector can effectively remove liquid or solid particles with a diameter of 0.1 - 20 microns from the air flow. At the same time, it can also remove some gaseous pollutants. It has the advantages of simple structure, small floor area, convenient operation and maintenance, and high purification efficiency. It can handle high-temperature and high-humidity air flows and minimize the possibility of fire and explosion. It is applicable to the washing and purification of harmful gases such as various industrial dusts, organic odors, acid and alkali waste gases, flue gas desulfurization of boilers, flue gases from die-casting machines, central furnaces, incinerators, chemical pharmaceuticals, food processing, metallurgy, casting, carbon materials, mechanical processing, building materials, tablet presses, granulators, mixers, batching, mixing, vibrating sieves and other industries.

[0003] The existing wet dust collector generates negative pressure through the rotation of an impeller. The negative pressure adsorbs water to generate water mist or fine water droplets to fill the conduit. In this way, it is convenient for the water mist or fine water droplets to fully mix with the dust particles to remove dust. However, dust particles of various sizes in the dust-containing gas all enter the conduit to mix with the water mist or fine water droplets for dust removal. On the one hand, the dust removal effect is not good. On the other hand, a greater suction force is required to adsorb and flow the larger dust particles, which will increase the load of the impeller motor. Summary of the Invention

[0004] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the present invention is to provide a two-stage spray wet dust removal device, which can effectively remove dust of different sizes by performing two-stage dust removal on the dust-containing gas, and improve the dust removal efficiency and quality.

[0005] The present invention is achieved through the following technical solutions:

[0006] A two-stage spray wet dust removal device, comprising an outer barrel, an upper barrel arranged at the upper end of the outer barrel, an inner barrel arranged inside the outer barrel and communicating with the bottom end inside the outer barrel, a first spray device arranged between the outer barrel and the inner barrel, a second spray device arranged inside the inner barrel, and a negative pressure component arranged inside the upper barrel. The upper barrel communicates with the upper end of the inner barrel. The first spray device is used to spray water mist between the outer barrel and the inner barrel. The second spray device is used to spray water mist into the inner barrel. The negative pressure component includes an impeller, and the impeller is used to form a negative pressure at the upper end of the inner barrel relative to the lower end and strike the dust. An air inlet communicating with the outer barrel is further arranged on one side of the outer barrel, and an air outlet communicating with the upper barrel is further arranged at the upper end of the upper barrel. The axial direction of the air inlet is tangent to the side wall of the outer barrel.

[0007] Wherein, the negative pressure component further includes a motor, the motor is installed inside the upper barrel, and the impeller is installed at the output end of the motor.

[0008] Wherein, a flow guide cover is arranged at the upper end of the inner barrel and extends around, and the flow guide cover is connected to the inner side wall of the upper barrel.

[0009] Wherein, a liquid blocking cover is further arranged between the upper barrel and the inner barrel, and the liquid blocking cover and the flow guide cover are arranged at intervals to form a flow guide channel.

[0010] Wherein, a return flow groove is further arranged between the flow guide cover and the upper barrel, and the return flow groove communicates with the outer barrel.

[0011] Wherein, the dust removal device further includes a liquid storage barrel arranged at the lower end of the outer barrel, and the liquid storage barrel communicates with the lower end of the outer barrel.

[0012] Wherein, an installation partition is further arranged between the liquid storage barrel and the outer barrel. The installation partition is provided with a plurality of installation holes, and a filtering component is installed in the installation holes. A liquid inlet pipe is communicated between the first spray device and the second spray device. A water pump is arranged inside the liquid storage barrel, and the liquid inlet pipe is communicated with the water pump.

[0013] Wherein, a conical atomizing cylinder is further arranged inside the inner barrel. The smaller-diameter end of the atomizing cylinder is provided with spray holes, and the larger-diameter end of the atomizing cylinder is an open structure. The smaller-diameter end of the atomizing cylinder is arranged close to the negative pressure component.

[0014] Wherein, the first spray device includes an annular pipe and a plurality of first atomizing nozzles arranged in an array along the annular pipe. The plurality of first atomizing nozzles are all directed at the lower end of the outer barrel. The second spray device includes an extension pipe and a plurality of second atomizing nozzles. One end of the extension pipe extends to the lower end of the inner barrel, and the plurality of second atomizing nozzles are all arranged at one end of the extension pipe and directed at the upper end of the inner barrel.

[0015] The beneficial effects of the present invention:

[0016] A two-stage spray wet dust removal device of the present invention is integrally divided into an outer barrel, an upper barrel and an inner barrel. Among them, the dust-containing gas enters the outer barrel from the air inlet. Since the axis of the air inlet is tangent to the side wall of the outer barrel, the dust-containing gas can enter the outer barrel in the form of a high-speed air flow. The dust in the dust-containing gas first contacts the water mist sprayed by the first spray device between the outer barrel and the inner barrel. Most of the large-particle dust and a part of the small-particle dust in the dust-containing gas contact the water mist and are thrown to the inner side wall of the outer barrel under the action of rotational centrifugal force to form water droplets with dust particles. The water droplets with dust particles can flow down along the inner side wall of the outer barrel, thus completing the first-stage dust removal. Subsequently, the dust-containing gas enters the inner barrel from the lower end of the outer barrel, and the negative pressure component generates negative pressure to suck up and mix the water mist sprayed by the second spray device at the bottom of the inner barrel and the dust-containing gas after the first-stage dust removal. The mixed water mist and dust-containing gas continue to flow along the inner barrel to the position of the negative pressure component and are struck and broken by the negative pressure component. In this way, the water in the water mist is further slapped and dispersed into smaller water mist. In this way, the smaller water mist and smaller dust particles are thrown to the inner side wall of the upper barrel by the negative pressure component and then form water droplets with dust particles and flow down, thus completing the second-stage dust removal. The dust-removed gas is discharged from the air outlet at the top of the upper barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the following drawings without creative efforts.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2 It is a cross-sectional view of the present invention.

[0020] Figure 3 It is Figure 2 an enlarged view of area A in

[0021] Figure 4 It is Figure 2 an enlarged view of area B in

[0022] Figure 5 It is an internal structural schematic diagram of the present invention.

[0023] Figure 6 It is a structural schematic diagram of the first spray device and the second spray device.

[0024] Figure 7 It is a structural schematic diagram of the impeller.

[0025] REFERENCE SIGNS

[0026] Outer barrel -- 101, upper barrel -- 102, inner barrel -- 103, air inlet -- 104, air outlet -- 105, flow guide cover -- 106, liquid baffle -- 107, flow guide channel -- 108, return groove -- 109, liquid storage barrel -- 110, installation partition -- 111, installation hole -- 112, atomization cylinder -- 113, spray hole -- 114,

[0027] First spraying device -- 201, second spraying device -- 202, liquid inlet pipe -- 203, annular pipe -- 204, first atomizing nozzle -- 205, extension pipe -- 206, second atomizing nozzle -- 207,

[0028] Negative pressure assembly -- 300, motor -- 301, impeller -- 302. Detailed implementation mode

[0029] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation mode of the present invention will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] The wet dust collector is commonly known as the "demister". It makes the dust-containing gas come into close contact with a liquid (usually water), and uses the inertial collision of water droplets and particles or the full mixing effect of water and dust and other effects to capture particles or make the particles larger or stay in a fixed container to achieve the effect of separating water and dust. The wet dust collector can effectively remove liquid or solid particles with a diameter of 0.1 - 20 microns from the air flow. At the same time, it can also remove some gaseous pollutants. It has the advantages of simple structure, small floor area, convenient operation and maintenance, and high purification efficiency. It can handle high-temperature and high-humidity air flows and minimize the possibility of ignition and explosion. It is applicable to the washing and purification of harmful gases such as various industrial dusts, organic odors, acid and alkali waste gases absorption and purification, boiler flue gas desulfurization, flue gas from die-casting machines, central furnaces, incinerators, etc., and industries such as chemical pharmaceuticals, food processing, metallurgy, casting, carbon materials, mechanical processing, building materials, tablet presses, granulators, mixers, batching, mixing, vibrating sieves, etc.

[0033] The existing wet dust collector generates negative pressure through the rotation of the impeller. Through the negative pressure, water is adsorbed to generate water mist or fine water droplets to fill the conduit. In this way, it is convenient for the water mist or fine water droplets to be fully mixed with the dust particles to remove dust. However, dust particles of various sizes in the dust-containing gas all enter the conduit to be mixed with the water mist or fine water droplets for dust removal. On the one hand, the dust removal effect is not good. On the other hand, a greater suction force is required to adsorb and flow the larger-diameter dust particles, which will increase the load of the motor.

[0034] To solve the above problems, this embodiment discloses a two-stage spray wet dust removal device, and its structure is as Figures 1 to 7 shown. The dust removal device includes an outer barrel 101, an upper barrel 102 arranged at the upper end of the outer barrel 101, an inner barrel 103 arranged in the outer barrel 101 and communicating with the bottom end inside the outer barrel 101, a first spray device 201 arranged between the outer barrel 101 and the inner barrel 103, a second spray device 202 arranged inside the inner barrel 103, and a negative pressure component 300 arranged inside the upper barrel 102. The upper barrel 102 communicates with the upper end of the inner barrel 103. The first spray device 201 is used to spray water mist between the outer barrel 101 and the inner barrel 103. The second spray device 202 is used to spray water mist into the inner barrel 103. The negative pressure component 300 is used to form a negative pressure at the upper end of the inner barrel 103 relative to the lower end and is used to strike the dust; an air inlet 104 communicating with the outer barrel 101 is further arranged on one side of the outer barrel 101, and an air outlet 105 communicating with the upper barrel 102 is further arranged at the upper end of the upper barrel 102.

[0035] Specifically, a two-stage spray wet dust removal device of the present invention is integrally divided into an outer barrel 101, an upper barrel 102 and an inner barrel 103. The dust-containing gas enters the outer barrel 101 from the air inlet 104. In this embodiment, the axis of the air inlet 104 is tangent to the side wall of the outer barrel 101, so that the dust-containing gas can enter the outer barrel 101 in the form of a high-speed air flow. The dust in the dust-containing gas first contacts the water mist sprayed by the first spray device 201 between the outer barrel 101 and the inner barrel 103. Most of the large-particle dust and part of the small-particle dust in the dust-containing gas contact the water mist and are thrown to the inner side wall of the outer barrel 101 under the action of rotational centrifugal force to form water droplets with dust particles. The water droplets with dust particles can flow down along the inner side wall of the outer barrel 101, thus completing the first-stage dust removal. Subsequently, the dust-containing gas enters the inner barrel 103 from the lower end of the outer barrel 101. The negative pressure assembly 300 generates negative pressure to suck up the water mist sprayed by the second spray device 202 at the bottom of the inner barrel 103 and the dust-containing gas after the first-stage dust removal and mix them with each other. The mixed water mist and dust-containing gas continue to flow along the inner barrel 103 to the position of the negative pressure assembly 300 and are struck and broken by the negative pressure assembly 300. In this way, the water in the water mist is further beaten and dispersed into smaller water mist. In this way, the smaller water mist and smaller dust particles are thrown to the inner side wall of the upper barrel 102 by the negative pressure assembly 300 to form water droplets with dust particles and flow down, thus completing the second-stage dust removal. The dust-removed gas can be discharged from the air outlet 105 at the top of the upper barrel 102.

[0036] Further, the negative pressure assembly 300 includes a motor 301 and an impeller 302. The motor 301 is installed in the upper barrel 102, and the impeller 302 is installed at the output end of the motor 301. The structure of the impeller 302 in this embodiment is as Figure 7 shown. The blades of the impeller 302 are integrally in a curved conical structure. This structure of the impeller 302 has two functions. One is the power source. The motor 301 drives the impeller 302 to reverse to generate negative pressure to draw the dust-containing gas into the upper barrel. The other is the secondary filtration. When the water mist passes through the impeller 302, it is struck and broken by the rotating impeller 302. In this way, the water is further beaten and dispersed into smaller water mist, so that the smaller water mist and smaller dust particles can be further combined and then thrown to the inner side wall of the upper barrel 102 by the centrifugal force generated by the impeller 302.

[0037] Further, a diversion cover 106 is provided at the upper end of the inner barrel 103 and extends peripherally. The diversion cover 106 is connected to the inner side wall of the upper barrel 102; a liquid blocking cover 107 is further provided between the upper barrel 102 and the inner barrel 103. The liquid blocking cover 107 is spaced from the diversion cover 106 to form a diversion channel 108. Referring to Figure x, the diversion cover 106 in this embodiment is of a conical structure. The shape of the liquid blocking cover 107 is adapted to the shape of the diversion cover 106. The smaller-diameter end of the diversion cover 106 is communicated with the inner barrel 103, and the diversion cover 106 is located below the impeller 302; the diversion channel 108 can guide the dust and water mist, so that the dust and water mist are dispersed around the inner barrel 103 after coming out of the upper end of the inner barrel 103 and enter the upper barrel 102 through the diversion barrel body, which is convenient for them to contact the periphery of the impeller 302 and improves the dust removal effect.

[0038] Further, a conical atomizing cylinder 113 is provided in the inner barrel 103. A spray hole 114 is provided at the smaller-diameter end of the atomizing cylinder 113, and the larger-diameter end of the atomizing cylinder 113 is of an open structure; the smaller-diameter end of the atomizing cylinder 113 is close to the negative pressure assembly 300. In this way, the water mist and dust after primary dust removal reach the bottom end of the atomizing cylinder 113. Part of them enters the atomizing cylinder 113 from the bottom of the atomizing cylinder 113 and is sprayed out and diffused from the spray hole 114 at the top of the atomizing cylinder 113. After being sprayed out, it is sprayed on the smaller-diameter end of the outer diameter of the liquid blocking cover 107, which is convenient for the water mist to be dispersed and can also disperse and atomize part of the water droplets; in addition, a certain gap is reserved between the larger-diameter end of the atomizing cylinder 113 and the inner barrel 103 in this embodiment, so that another part of the water mist and dust flow enters the space between the inner barrel 103 and the atomizing cylinder 113 through this gap and moves upward. In this way, the water mist and dust flow inside and outside the atomizing cylinder 113 are mixed at the top of the inner barrel 103 and discharged from the diversion channel 108. In this way, the water mist discharged from the diversion channel 108 can also contact the impeller 302.

[0039] In addition, a return groove 109 is provided between the diversion cover 106 and the upper barrel 102. The return groove 109 is communicated with the outer barrel 101. The water droplets carrying dust particles can flow downward through the return groove 109 and flow into the outer barrel 101, which is convenient for collecting the water carrying dust particles.

[0040] Further, the dust removal device further includes a liquid storage bucket 110 disposed at the lower end of the outer bucket 101. The liquid storage bucket 110 is communicated with the lower end of the outer bucket 101, and the liquid storage bucket 110 can collect the water flowing along the inner side wall of the outer bucket 101. In addition, in this embodiment, an installation partition 111 is further provided between the liquid storage bucket 110 and the outer bucket 101. The installation partition 111 is provided with a plurality of installation holes 112, and a filtering component is installed in the installation holes 112. A liquid inlet pipe 203 is communicated between the first spraying device 201 and the second spraying device 202. A water pump is arranged in the liquid storage bucket 110, and the liquid inlet pipe 203 is communicated with the water pump. The water droplets with dust flow to the installation partition 111 along the inner side wall of the outer bucket 101 and enter the filtering component. The filtering component can isolate the dust and allow pure water to pass through and drip into the liquid storage bucket 110, so that the dust adheres to the filtering component, completing the separation of the dust and the pure water. In addition, the pure water dripping into the liquid storage bucket 110 can be pumped back into the liquid inlet pipe 203 through the water pump and enter the first spraying device 201 and the second spraying device 202 respectively to spray water mist again, which can save water. In this embodiment, the filtering component is preferably a filter bag.

[0041] Further, the first spraying device 201 includes an annular pipe 204 and a plurality of first atomizing nozzles 205 arranged in an array along the annular pipe 204. The plurality of first atomizing nozzles 205 are all directed at the lower end of the outer bucket 101. The second spraying device 202 includes an extension pipe 206 and a plurality of second atomizing nozzles 207. One end of the extension pipe 206 extends to the lower end of the inner bucket 103, and the plurality of second atomizing nozzles 207 are all arranged at one end of the extension pipe 206 and are directed at the upper end of the inner bucket 103. During actual use, the water pump is started to pump the water in the liquid storage bucket 110 into the liquid inlet pipe 203, which is branched into the annular pipe 204 and the extension pipe 206, and then the water mist is sprayed out by the first atomizing nozzles 205 and the second atomizing nozzles 207 respectively. The water mist sprayed out by the first atomizing nozzles 205 is located between the inner bucket 103 and the outer bucket 101, and the water mist sprayed out by the second atomizing nozzles 207 is directly sprayed into the inner bucket 103 or even the atomizing cylinder 113.

[0042] It should be noted that the structures and principles of the water pump, the filtering component, the first atomizing nozzle 205 and the second atomizing nozzle 207 in this embodiment are all prior arts and will not be elaborated here.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A two-stage spray wet dust removal device, characterized in that: it includes an outer barrel, an upper barrel arranged at the upper end of the outer barrel, an inner barrel arranged in the outer barrel and communicating with the bottom end inside the outer barrel, a first spray device arranged between the outer barrel and the inner barrel, a second spray device arranged inside the inner barrel, and a negative pressure component arranged inside the upper barrel. The upper barrel communicates with the upper end of the inner barrel. The first spray device is used to spray water mist between the outer barrel and the inner barrel. The second spray device is used to spray water mist into the inner barrel. The negative pressure component includes an impeller, and the impeller is used to form a negative pressure at the upper end of the inner barrel relative to the lower end and is used to strike dust; an air inlet communicating with the outer barrel is further arranged on one side of the outer barrel, and an air outlet communicating with the upper barrel is further arranged at the upper end of the upper barrel. The axial direction of the air inlet is tangent to the side wall of the outer barrel; a diversion cover extends around the upper end of the inner barrel, and the diversion cover is connected to the inner side wall of the upper barrel. The diversion cover is of an inverted conical structure. A liquid blocking cover is further arranged between the upper barrel and the inner barrel. The shape of the liquid blocking cover is adapted to the shape of the diversion cover. The liquid blocking cover and the diversion cover are arranged at intervals to form a diversion channel. The diversion channel can guide dust and water mist, so that the dust and water mist disperse around the inner barrel after coming out of the upper end of the inner barrel and enter the upper barrel through diversion and contact the periphery of the impeller; a conical atomizing cylinder is further arranged inside the inner barrel. Spray holes are arranged at the end with a smaller inner diameter of the atomizing cylinder, and the end with a larger inner diameter of the atomizing cylinder is of an open structure; the end with a smaller inner diameter of the atomizing cylinder is arranged close to the negative pressure component, and a gap is reserved between the end with a larger outer diameter of the atomizing cylinder and the inner barrel. The water mist and dust sprayed out from the spray holes at the top of the atomizing cylinder are sprayed on the end with a smaller outer diameter of the liquid blocking cover.

2. A two-stage spray wet dust removal device according to claim 1, characterized in that: the negative pressure component includes a motor, the motor is installed inside the upper barrel, and the impeller is installed at the output end of the motor.

3. A two-stage spray wet dust removal device according to claim 1, characterized in that: a return groove is further arranged between the diversion cover and the upper barrel, and the return groove communicates with the outer barrel.

4. A two-stage spray wet dust removal device according to claim 1, characterized in that: the dust removal device further includes a liquid storage barrel arranged at the lower end of the outer barrel, and the liquid storage barrel communicates with the lower end of the outer barrel.

5. A two-stage spray wet dust removal device according to claim 4, characterized in that: an installation partition is further arranged between the liquid storage barrel and the outer barrel. A plurality of installation holes are opened in the installation partition, and filtering components are installed in the installation holes; a liquid inlet pipe is communicated between the first spray device and the second spray device. A water pump is arranged inside the liquid storage barrel, and the liquid inlet pipe is communicated with the water pump.

6. A two-stage spray wet dust removal device according to claim 1, characterized in that: The first spraying device includes an annular pipe and a plurality of first atomizing nozzles arranged in an array along the annular pipe, and the plurality of first atomizing nozzles are all directed at the lower end of the outer barrel; the second spraying device includes an extension pipe and a plurality of second atomizing nozzles, one end of the extension pipe extends to the lower end of the inner barrel, and the plurality of second atomizing nozzles are all arranged at one end of the extension pipe and directed at the upper end of the inner barrel.

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