CN105477960A - Composite emulsification type high-efficiency wet dust remover - Google Patents

Abstract

The invention relates to a composite emulsification type high-efficiency wet dust collector, which comprises a rod type Venturi emulsification dust removal device, a sewage discharge device, a wet emulsification fan and an air-water separation cylinder. The first-stage casing of the rod-type Venturi emulsification and dust removal device is provided with a plurality of water pipes, and there are gaps between the water pipes. The special structural design makes the Venturi effect occur when the gas flows through. The bottom of the body is designed with a conical sewage outlet, and can be equipped with a hammer valve. The wet emulsification fan adopts an open straight blade impeller design, and a nozzle is passed into the air inlet, and the washing liquid is sprayed out of the nozzle. The gas-water separation cylinder includes a vertical cylinder, and the lower part of the cylinder is conical. , the sewage outlet is located at the tip of the cone. The invention has a dust removal efficiency of more than 99% for dust with a diameter of 1 μm or more, and at the same time has a simple structure and low manufacturing cost, and can adjust the spray angle of the cleaning liquid of the rod-type Venturi emulsification and dust removal device according to the requirements of on-site dust collection and emission standards, and increase the It improves adaptability, reduces energy consumption, and better meets the requirements of on-site dust removal.

Description

A compound emulsification type high-efficiency wet dust collector

technical field

The invention relates to a composite emulsification type high-efficiency wet dust collector.

Background technique

Wet dust collectors are widely used in mining, metallurgy, chemical industry, power generation and other industrial occasions with large dust production. Ducon's patented UW-4 dust collector product has the advantages of high dust removal efficiency, low failure rate, and low maintenance cost due to the use of a composite wet dust removal mechanism. It is especially suitable for high humidity, high viscosity, high initial dust content, and dust. When the particle size is small. It consists of the first-stage cyclone water film dust removal device with swirl plate, the second-stage fan and the third-stage air-water separation cylinder. Due to its large internal airway resistance and structural design defects, it not only has high energy consumption, but also has high manufacturing and use costs.

Contents of the invention

In order to overcome the above-mentioned technical defects, the present invention provides a compound emulsification high-efficiency wet dust collector with higher dust removal efficiency, simpler structure, lower manufacturing cost and low energy consumption.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a compound emulsification type high-efficiency wet dust collector, including a rod type Venturi emulsification dust removal device, a sewage discharge device, a wet emulsification fan and a gas-water separation cylinder.

The rod-type Venturi emulsification and dedusting device includes a first-stage housing. The first-stage housing has a first-stage air inlet, a first-stage air outlet and openings. A plurality of water pipes are installed in the first-stage housing through the openings. In the body, there is a gap for the passage of dusty gas between adjacent water pipes in the radial direction, and a long pipe extending along the length direction of the water pipe is opened on the side of the water pipe wall close to the first-stage air inlet of the first-stage shell. The hole and the water pipe are all connected with the water outlet of the water supply pipe, and the washing liquid is inserted into the water inlet of the water supply pipe, and the washing liquid is sprayed from the long hole.

The sewage discharge device includes a second-stage casing, the second-stage casing has a second-stage air inlet and a second-stage air outlet, and a conical sewage outlet is designed at the bottom of the second-stage casing, and the second stage of the sewage discharge device The first-stage air inlet is connected with the first-stage air outlet of the rod-type Venturi emulsification dust removal device.

The wet emulsification fan has a third-stage air inlet and a third-stage air outlet, the third-stage air inlet leads into the nozzle, and the washing liquid is sprayed out in the nozzle, and the third-stage air inlet of the wet-type emulsification fan is connected to the sewage discharge device. The second-stage air outlet is connected, and the third-stage air outlet of the wet emulsification fan is connected with the fourth-stage air inlet of the gas-water separation cylinder.

The gas-water separation cylinder includes a cylinder in a vertical direction, a fourth-stage air inlet is provided in a tangential direction in the middle of the cylinder, a fourth-stage air outlet is provided on the top of the cylinder, and the lower part of the cylinder is tapered , the sewage outlet is located at the tip of the cone.

After adopting the above structure, compared with the prior art, the present invention has the following advantages:

When the present invention is in use, the dust-laden gas passes through the rod-type Venturi emulsification and dust removal device, the sewage device, the wet emulsification fan and the gas-water separation cylinder in sequence. When the dust-laden gas passes through the rod-type Venturi emulsification and dust removal device, it will produce a Venturi effect and generate strong turbulence. Compared with the washing liquid sprayed out near the first-stage gas outlet, the relative velocity of the gas-liquid two-phase here is greater, and the dust and washing liquid are more likely to collide and condense to form an emulsified state. The larger the cleaning liquid spray angle, the larger the gas-liquid contact area and the better the dust removal effect, but the pressure loss will also increase. Since the water pipe of the device of the present invention can rotate relative to the housing, that is, the spraying angle of the washing liquid can be adjusted, it can flexibly adjust the spraying angle of the washing liquid according to the dust removal requirements on site, so as to reduce energy consumption under the premise of meeting the dust removal requirements the goal of. Part of the dust mixed with the liquid droplets forms sewage droplets, which fall due to gravity and settle in the sewage discharge device. The rod-type Venturi emulsification and dust removal device performs primary purification of the dusty gas, and the discharged mud is discharged through the sewage discharge device. After the primary purification, the dust-laden gas enters the fan together with the liquid droplets sprayed from the nozzle at the fan inlet, and forms a highly emulsified gas-liquid mixture under the strong disturbance of the fan impeller, which increases the contact area between the dust and the liquid droplets. Achieve efficient dust removal effect. After two times of dedusting, the dust in the dusty gas is basically completely removed. The moisture in the exhaust gas is dehydrated by the gas-water separation cylinder and then discharged. The dust collector of the present invention adopts the above scheme, and the dust removal efficiency for dust with a diameter of 1 μm or more is more than 99%. At the same time, the rod-type Venturi dust removal device and the sewage discharge device that can adjust the spraying angle of the washing liquid adopted in the present invention are compared with UW-4 The cyclone water film dedusting device adopted by the dust collector product has a simpler structure and lower manufacturing cost, and under the same working conditions, the energy consumption of the present invention is reduced by at least 10%. In addition, the present invention can be equipped with rod-type Venturi emulsification and dust removal devices with different openings according to the on-site dust collection and discharge standard requirements, which increases the adaptability and better meets the on-site dust removal requirements.

Description of drawings

Fig. 1 is the structural representation of compound emulsification type high-efficiency wet dust collector of the present invention;

Fig. 2 is the structural representation of rod type Venturi emulsification and dedusting device;

Fig. 3 is an exploded view of Fig. 2;

Fig. 4 is a sectional view along A-A in Fig. 2;

Fig. 5 is a partial enlarged view of Fig. 4;

Fig. 6 is a sectional view along B-B among Fig. 4;

Fig. 7 is a schematic diagram of the cross-section of two adjacent water pipes;

Fig. 8 is the structural representation of blowdown device;

Fig. 9 is a longitudinal sectional view of the blowdown device;

Fig. 10 is a schematic structural view of a wet emulsification blower;

Fig. 11 is a structural schematic diagram of a wet emulsification fan impeller;

Fig. 12 is the front view of the wet emulsification fan impeller;

Fig. 13 is a schematic structural view of the gas-water separation cylinder.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the compound emulsification type high-efficiency wet dust collector of the present invention includes a rod type Venturi emulsification dust removal device, a sewage discharge device, a wet emulsification fan and a gas-water separation cylinder.

As shown in Figures 2 to 6, the rod-type Venturi emulsification and dust removal device includes a first-stage housing 11, and the first-stage housing 11 has a first-stage air inlet 12, a first-stage air outlet 13 and an opening 111, A plurality of water pipes 14 are installed in the first-stage housing 11 through openings 111. The water pipes 14 are parallel to each other. There is a gap between adjacent water pipes 14 radially for the passage of dusty gas. The walls of the water pipes 14 are close to the first-stage One side of the first-stage air inlet 12 of the casing 11 is provided with a long hole 16 extending along the length direction of the water pipe 14. A water inlet valve is installed to control whether to supply water to the water supply pipe 15, and the washing liquid is connected to the water inlet 151, and the washing liquid is sprayed from the long hole 16.

Referring to Figures 3 to 5, the opening 111 of the first stage housing 11 and the water pipe 14 have a first gap 18, the water outlet 152 of the water pipe 15 and the water pipe 14 have a second gap 19, the first gap 18 and the water pipe 14 have a second gap 19. The two gaps 19 are provided with a sealing device 17, the water pipe 14 and the first-stage housing 11 can rotate relative to each other, and the water pipe 14 and the water supply pipe 15 can rotate relative to each other. Since the sealing device 17 has a certain radial pressure, it can provide a certain friction force while providing the sealing function, which can prevent the water pipe 14 from rotating during the operation of the dust collector, and can also adjust the cleaning of the water pipe when a certain torque is applied. The injection angle of the liquid can be adjusted to achieve high adaptability to on-site dust removal and reduce energy consumption.

Referring to FIGS. 2 to 4 and 6 , four water pipes 14 are provided in total, which are respectively marked as the first water pipe, the second water pipe, the third water pipe and the fourth water pipe from top to bottom. There are gaps between the first water pipe and the second water pipe, between the second water pipe and the third water pipe, between the third water pipe and the fourth water pipe, the first water pipe and the upper side wall of the housing 11, the fourth water pipe and the The lower side walls of the first casing 11 are all provided with gaps.

As shown in FIG. 7 , in the cross-sections of two adjacent water pipes 14 , two rays a perpendicular to the axes of the water pipes 14 and passing through the long holes 16 intersect. In the cross-section of the adjacent water pipes 14, the angle between the extension line of the axis of the elongated hole 16 on one of the water pipes 14 and the vertical line of the two water pipes 14 is X, and the elongated hole 16 on the other water pipe 14 The angle between the extension line of the axis and the vertical line of the two water pipes 14 is Y. Since the water pipe 14 is rotatable relative to the housing 11, the angles of X and Y can be adjusted within a certain range, and the angles of the included angles X and Y can be adjusted from 0 to 45 degrees, and a in the figure is the length of the long hole 16 The extension line of the axis, that is, the extension line of the radial line of the water pipe 14 passing through the center point of the long hole 16, b is the angle between the vertical lines of the two water pipes 14, that is, the connecting line of the center points of the two water pipes 14 .

As a preferred solution, the angle adjustment ranges of the included angles X and Y are both 11 to 19 degrees. As a more preferred solution, the angles of the included angles X and Y are equal and both are 15 degrees, and the included angles X and Y The equal angles make it more convenient to process the elongated hole 16 on the water pipe 14, and when the angles X and Y are both 15 degrees, the water has a better atomization effect after being sprayed from the elongated hole 16.

The water supply pressure of the plurality of water pipes 14 is normal pressure, namely 0.1 MPa, that is to say, when the water pump is used to supply water to the first water pipe 14, the water pressure at the output end of the water pump is 0.1 MPa.

When the rod-type Venturi emulsification and dust removal device is working, the gas in the first-stage casing 11 passes through the gap between the water pipes 14 at a flow rate of 20m/s-50m/s, resulting in a Venturi effect, and the water in the water pipe 14 passes through the long hole 16 sprays, the dust in the dusty gas collides violently with the liquid droplets and condenses to form dusty droplets, completing the initial dedusting of the dusty gas.

As shown in Figures 8 and 9, the blowdown device 2 includes a second-stage housing 21, the second-stage housing has a second-stage air inlet 22 and a second-stage air outlet 23, and is designed at the bottom of the second-stage housing Conical sewage outlet 24, under the sewage outlet 24 is installed a weight valve 25 that can be opened and closed. The second-stage air inlet 22 of the sewage discharge device is connected with the first-stage outlet 13 of the rod-type Venturi emulsification and dust removal device 1 . The inclination angle between the sewage device 2 and the horizontal plane is Z, the angle of Z is 0-45 degrees, and the preferred inclination angle of Z is 10-15 degrees.

When the sewage discharge device 2 is working, the gas at the first-stage gas outlet 13 of the rod-type Venturi emulsification and dedusting device 1 enters the second-stage housing 21, and the dust-laden liquid droplets entrained by the gas fall under the action of gravity, and due to The sewage discharge device 2 has an inclination angle of 10 degrees to the horizontal plane and has a certain axial length, which makes most of the dust-laden liquid droplets fall into the conical sewage outlet 24 at the bottom of the second-stage housing 21 and be discharged. This reduces the number of dust-containing droplets, especially those containing large and medium-sized dust particles, entering the wet emulsification fan, which is conducive to reducing the wear of the wet emulsification fan blades and prolonging the life of the fan. The hammer valve 25 installed below the sewage outlet 24 will only be opened when there is enough sewage, otherwise it will be in a closed state, which will help reduce the air leakage loss of the dust collector and reduce energy consumption.

As shown in Figures 10 to 12, the wet emulsification blower 3 includes a volute 31 and an impeller 32, the volute 31 has a third-stage air inlet 33 and a third-stage air outlet 34, and the third-stage air inlet 33 is connected to Nozzle 35, spraying washing liquid in the nozzle, the third-stage air inlet 33 of the wet emulsification fan 3 is connected with the second-stage air outlet 23 of the sewage discharge device, and the third-stage air outlet 34 of the wet emulsification fan is connected with the air-water separation cylinder The fourth stage air inlet 42 of 4 is connected.

The water supply pressure of the nozzle 35 is normal pressure, that is, 0.1 MPa, that is to say, when the water pump is used to supply water to the nozzle 35, the water pressure at the output end of the water pump is 0.1 MPa.

The blades 321 of the wet emulsification blower 3 are straight blades, preferably radial straight blades. Radial straight blades are straight blades with blade inlet installation angles and blade outlet installation angles of 90 degrees, which can effectively prevent mud from adhering, and even if mud adheres to radial straight blades, it is easier to clean, which can reduce Wear of the impeller. The number of blades is at least 6, and the preferred number of blades is 6 or 8. When the number of blades is 6 or 8, it can not only reduce the weight of the fan impeller, but also make the air volume of the device more uniform and stable.

When the wet emulsification fan 3 is working, the pre-dedusted gas still contains some dust particles, which enter the wet emulsification fan 3 through the second-stage air outlet 23 of the sewage discharge device 2, and at the same time, the liquid droplets ejected from the nozzle 35 enter the inside of the fan , the dust particles collide, mix and condense with the liquid droplets under the strong disturbance of the fan impeller 32 . Finally, the dust-laden liquid droplets are thrown towards the inner surface of the volute 31 under the centrifugal force of the fan impeller 32 , and finally flow into the air-water separation cylinder 4 through the third-stage air outlet 34 , and are discharged from the sewage outlet 44 of the air-water separation cylinder 4 . After the dust is removed by the fan, the dusty gas is basically completely removed.

As shown in Figure 13, the gas-water separation cylinder 4 includes a vertical cylinder body 41, a fourth-stage air inlet 42 is provided in the tangential direction in the middle of the cylinder body, and a fourth-stage air outlet 43 is provided at the top of the cylinder body , the lower part of the cylinder is conical, the sewage outlet 44 is located at the tip of the cone, and the middle of the cylinder 41 is provided with an inspection door 45 .

When the gas-water separation cylinder 4 is working, the gas discharged from the third-stage air outlet 34 of the wet emulsification fan enters the cylinder at a certain speed. Since the gas discharged by the fan contains a large amount of water, the function of the gas-water separation cylinder is to separate the air The moisture in it is separated. The side wall of the fourth-stage air inlet 42 is tangent to the inner wall of the cylinder 41. After the gas enters the cylinder 41, the gas rotates along the inner wall of the cylinder 41 and moves in a spiral shape. The moisture in the gas is separated under the action of strong centrifugal force, condenses on the inner wall surface of the cylinder wall 41, and finally gathers and discharges from the sewage outlet 44 at the lower end of the cylinder, while the clean gas is discharged from the fourth-stage gas outlet 43 above the cylinder .

The above is only a description of the preferred examples of the application of the present invention, but it should not be construed as a limitation on the claims. The structure of the present invention can have other changes and is not limited to the above structure. In a word, all the various changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims (10)

1. A composite emulsification type high-efficiency wet dust collector, comprising rod type Venturi emulsification dust removal device (1), blowdown device (2), wet emulsification blower fan (3) and gas-water separation cylinder (4), is characterized in that, Described rod type Venturi emulsification and dedusting device (1) comprises a first-level housing (11), and the first-level housing (11) has a first-level air inlet (12), a first-level air outlet (13) and a first-level housing (11). The opening (111), a plurality of water pipes (14) are installed in the first-stage housing (11) through the opening (111), and there is a gap for the passage of dusty gas between adjacent water pipes (14) in the radial direction. On the wall of the water pipe (14), there is a long hole (16) extending along the length direction of the water pipe (14) on the side close to the first-stage air inlet (12) of the first-stage casing (11), and the water pipe (14) ) are all connected with the water outlet (152) of the water supply pipe (15), insert the washing liquid in the water inlet (151) of the water supply pipe (15), and the washing liquid is sprayed from the long hole (16); The sewage discharge device (2) includes a second-stage housing (21), which has a second-stage air inlet (22) and a second-stage air outlet (23), and is designed at the bottom of the second-stage housing There is a conical sewage outlet (24), and the second-stage air inlet (22) of the sewage discharge device is connected with the first-stage air outlet (13) of the rod-type Venturi emulsification and dust removal device; The wet emulsification blower (3) has a third-stage air inlet (33) and a third-stage air outlet (34), and the third-stage air inlet (33) leads into the nozzle (35), and the washing liquid is sprayed out in the nozzle , the third-stage air inlet (33) of the wet emulsification fan is connected with the second-stage air outlet (23) of the blowdown device, and the third-stage air outlet (34) of the wet emulsification fan is connected with the air-water separation cylinder (4) The fourth stage air inlet (42) is connected; The gas-water separation cylinder (4) comprises a cylinder body (41) in a vertical direction, a fourth-stage air inlet (42) is provided in a tangential direction in the middle of the cylinder body, and a fourth-stage outlet port (42) is provided on the top of the cylinder body. The air port (43), the bottom of the cylinder is conical, and the sewage outlet (44) is located at the tip of the conical. 2. A compound emulsification type high-efficiency wet dust collector according to claim 1, characterized in that there is a first gap ( 18), the water outlet (152) of the water pipe (15) and the water pipe (14) have a second gap (19), the first gap (18) and the second gap (19) are all provided with a sealing device (17), the The water pipe (14) and the first stage casing (11) can rotate relatively, and the water pipe (14) and the water supply pipe (15) can rotate relatively. 3. A compound emulsification type high-efficiency wet dust collector according to claim 1 or 2, characterized in that: the rod type Venturi emulsification dust removal device (1) is in the cross section of two adjacent water pipes (14) , intersect two rays (a) perpendicular to the axis of the water pipe (14) and pass through the long hole (16); in two adjacent water pipes, one of the water pipes perpendicularly intersects with the axis of the water pipe and passes through the long hole The angle between the ray and the vertical line (b) of the two water pipes is X, and the angle between the ray on the other water pipe that is perpendicular to the axis of the water pipe and passes through the long hole and the vertical line (b) of the two water pipes is Y, wherein the angle between X and Y is 0-45 degrees. 4. A compound emulsification type high-efficiency wet dust collector according to claim 3, characterized in that: the included angles X and Y are both 15 degrees. 5. A compound emulsification type high-efficiency wet dust collector according to claim 1, characterized in that: the inclination angle between the sewage discharge device (2) and the horizontal plane is Z, wherein the inclination angle Z is 0-45 degrees. 6. A compound emulsification type high-efficiency wet dust collector according to claim 5, characterized in that: said inclination angle Z is 10-15 degrees. 7. A compound emulsification type high-efficiency wet dust collector according to claim 1, characterized in that: the sewage discharge device (2) has a heavy hammer valve (25) that can be opened and closed at the sewage outlet (24) ). 8. A compound emulsification type high-efficiency wet dust collector according to claim 1, characterized in that: the blades (321) of the wet emulsification fan (3) are straight blades. 9. A compound emulsification type high-efficiency wet dust collector according to claim 8, characterized in that: the blades (321) of the wet emulsification fan (3) are straight radial blades. 10. A compound emulsification type high-efficiency wet dust collector according to claim 8 or 9, characterized in that: the number of blades of the wet emulsification fan (3) is at least 6 pieces.