CN107971151A - A kind of liquid film type multicyclone - Google Patents

Abstract

The invention relates to a liquid film multi-pipe cyclone dust collector, comprising a box body, a liquid film multi-pipe cyclone dust removal assembly, and a separation and purification device; the liquid film multi-pipe cyclone dust removal assembly includes at least two water film cyclones, overflow The water tank and the air inlet pipe; the water film cyclone includes an exhaust pipe, multiple deflectors, the upper part of the cylinder, the lower part of the cylinder and the cyclone cone; the lower end of the upper part of the cylinder is provided with a baffle; the box Multiple partitions are designed in the return air chamber to form multiple return air chambers, and a fan is installed on the top of each return air chamber; the box is connected to the separation and purification device through the sewage pipe; the air inlet pipe is set on the side of the air inlet chamber . The invention improves the dust removal efficiency of the cyclone dust collector by introducing the cyclones of the multi-pipe cyclone dust collector into the water film for absorption; and reduces turbulent flow and partial suction by arranging multiple air return chambers and fans. The invention purifies the sewage through the arrangement of the separation box and the purification box, so that the water in the purification box can be recycled and used, and water is saved.

Description

A liquid film multi-tube cyclone dust collector

technical field

The invention belongs to the technical field of flue gas dust removal devices, in particular to a liquid film multi-pipe cyclone dust collector.

Background technique

The cyclone dust collector is a kind of mechanical dust collector. Its dust removal mechanism is a kind of gas-solid-liquid separation equipment that separates dust from the air flow by using the centrifugal force generated by the gas non-uniform system during high-speed rotation. Since the centrifugal force suffered by the particles is much greater than the gravity and inertial force, the smallest particle size that can be economically separated by the cyclone separator can reach 5 μm. In addition, the cyclone separator has a relatively simple structure, convenient operation and maintenance, stable performance, and is not limited by the concentration, temperature and physical properties of the dusty gas, and the cost is low, so it has been widely used in petroleum, chemical, coal, electric power, etc. , environmental protection and metallurgy and other industrial production.

At present, in order to improve the separation effect of the cyclone separator, a parallel processing method of multiple small-diameter cyclones is usually used, that is, a multi-tube cyclone separator. Although the parallel multi-tube cyclone dust collector device has a dust removal efficiency of 80-85% for particles of 3 μm, it still belongs to the medium-efficiency dust collector.

In the use of the cyclone dust collector, after the solid particles reach the wall surface, they are easy to bounce to the central circulation area of the cyclone due to the rough wall surface, which affects the dust removal efficiency. In addition, there are poor air flow balance, serious partial suction phenomenon and serious wear of the cyclone. cons.

At present, there are many improvement measures aimed at cheating. For example, the adjustable air volume cyclone dust collector CN202263657U uses an air volume adjustment device to ensure that the air flow in the return air cavity is uniform and there will be no partial suction. Upward swirling water film dust collector (CN106492565A) adds a liquid film overflow tank on the upper end of the vertical pipeline, and the overflow water in the liquid film overflow tank is evenly distributed on the inner wall circumference of the vertical pipeline in a thin layer continuously downwards. A film of water that flows evenly, but leaks air. Cyclone water film dust remover CN106334401A is provided with a settling tank, and a circumvention structure is formed by setting partitions to purify sewage for recycling. The wet method multi-tube cyclone separator CN105750100A improves the separation efficiency of the separator through the "liquid film absorption" on the cylinder wall in the inlet chamber, and also improves the separation efficiency through the double-cut inflow inlet and the uniquely designed cyclone sub-cylinder, etc. Effect. Cyclone water film dust collectors CN204395710U and CN204395711U, vertical cyclone water film dust collector CN2774640 introduce water film into the cyclone to improve the dust removal efficiency of the cyclone dust collector, but they are all aimed at a single cyclone, and they all enter tangentially air intake method.

Contents of the invention

The object of the present invention is to provide a liquid film multi-pipe cyclone dust collector to solve the above problems, improve the original technical achievements, and aim to improve the efficiency and service life of the multi-pipe cyclone dust collector. The invention improves the dust removal efficiency of the cyclone dust collector by introducing the cyclones of the multi-pipe cyclone dust collector into the water film for absorption; and reduces turbulent flow and partial suction by arranging multiple air return chambers and fans. The present invention purifies the sewage through the arrangement of the separation box and the purification box, so that the water in the purification box can be recycled and used, saving water.

The technical solution of the present invention is: a liquid film multi-pipe cyclone dust collector, including a box body, a liquid film multi-pipe cyclone dust removal assembly, and a separation and purification device;

The liquid film multi-pipe cyclone dedusting assembly includes at least two water film cyclones, an overflow tank and an air inlet pipe; the water film cyclone and the overflow tank are installed in the box; the water film cyclone includes Exhaust pipe, a plurality of deflectors, the upper part of the cylinder, the lower part of the cylinder and the cyclone sub-cone; one end of the exhaust pipe extends into the upper part of the cylinder from the top of the upper part of the cylinder, and the guide The flow plate is distributed between the upper part of the cylinder and the exhaust pipe, and one end is connected with the inner wall of the upper part of the cylinder, and the other end is connected with the exhaust pipe; The plate is ring-shaped, and the baffle plate can form a liquid seal with the lower part of the cylinder, and the lower part of the cylinder and the inner wall of the upper part of the cylinder form an annular overflow hole; the upper opening edge of the lower part of the cylinder is connected with the overflow tank; the cyclone The bottom of the sub-cone is provided with an ash discharge pipe;

The upper part of the box body is provided with an upper partition, and the overflow tank is located under the upper partition, the return air chamber is between the top of the cabinet and the upper partition, the air inlet chamber is between the upper partition and the overflow tank, and the overflow tank There is a water tank between it and the bottom plate of the box body; the other end of the exhaust pipe enters the return air chamber through the upper partition; multiple partitions are designed in the return air chamber to form multiple return air chambers. A fan is installed on the top of the air chamber;

The sewage pipe extends below the liquid level of the water tank; the bottom of the tank is provided with a sewage pipe, and the tank communicates with the separation and purification device through the sewage pipe;

A water supply system is arranged above the overflow tank;

The air inlet pipe is arranged on the side of the air inlet chamber and above the liquid level of the overflow tank.

In the above solution, the separation and purification device includes a separation tank and a clean water tank;

The separation box includes a cylindrical surrounding fluid, a plurality of baffles, an ash collection tank, a sewage outlet of the separation box, a primary filter, and a secondary filter;

The cylindrical surrounding fluid is set at the position where the bottom of the separation box communicates with the sewage pipe, the ash collecting tank is set above the cylindrical surrounding fluid, and one end is connected to the inner wall of the separation box, and the sewage outlet of the separation box is set at the collecting Above the ash trough; one end of the baffle is respectively connected with the inner wall of the separation box, and is alternately arranged in the separation box, and the other end is inclined downward; a first-stage filter is set at the upper part of the separation box;

The separation box is communicated with the clean water tank through a secondary filter screen, and one end of the secondary filter screen is arranged on the upper part of the separation box and the clean water tank partition.

In the above solution, the bottom plate of the box body is arranged obliquely, and the direction of inclination is biased toward the separation box.

In the above solution, the other end of the secondary filter screen is arranged obliquely toward the direction of the separation box.

In the above solution, several shower heads are also included, and the shower heads are arranged in a section of the air inlet pipe close to the air inlet cavity;

The air inlet pipe is V-shaped; the bottom of the air inlet pipe is provided with a liquid return pipe; the lower end of the liquid return pipe extends below the liquid level of the washing liquid tank.

In the above solution, the water supply system includes a water supply pipe and a circulating pump;

The air inlet chamber is connected to the clean water tank through a water supply pipe, the valve body is arranged on the water supply pipe, and the circulating pump is arranged on the water supply pipe and is located between the valve body and the clean water tank.

In the above solution, the primary filter screen and the secondary filter screen are textile fiber filter screens.

The above solution also includes a water tank maintenance port and an overflow port, and a separation tank maintenance port; the water tank maintenance port and overflow port are arranged on the side above the liquid level of the water tank; the separation tank maintenance port is arranged on the bottom side of the separation box.

In the above solution, the upper part of the separation box and the fresh water tank is provided with openings.

In the above solution, the clean water tank is provided with an automatic replenishment valve.

Compared with prior art, the beneficial effect of the present invention is:

1. The present invention draws lessons from the principle of the water film dust collector and proposes a cyclone that "water film absorbs solid particles". Effectively improve the flue gas treatment effect, improve dust removal efficiency; reduce the wear and tear of the cyclone, prolong the service life of the dust collector; effectively prevent the clogging of the cyclone for sticky dust; at the same time, it can reduce the water-carrying phenomenon of the water film dust collector; in addition, the present invention The advanced separation and purification device can purify sewage. The separation box deposits and stores the separated dust, and the purified water is stored in the clean water tank, which is recycled by the circulation pump to save water.

2. The setting of the overflow groove, the water retaining plate and the overflow hole described in the present invention is aimed at uniformly distributing a layer of very thin water film continuously and uniformly flowing downwards on the inner wall circumference of the cyclone, and at the same time can form Liquid seal to avoid air leakage from the cyclone.

3. The arrangement of the impeller deflector in the present invention is to form a swirling airflow in the cyclone.

4. The spray head in the air inlet pipe of the present invention is to remove toxic chemical substances in the smoke or to gather tiny dust particles in the gas, and at the same time reduce the temperature of the high-temperature air to effectively improve the purification effect. The air inlet pipe is V-shaped, so that the sprayed washing liquid can be recovered and enter the washing liquid tank through the liquid return pipe. At the same time, if the water level in the overflow tank is too high, water can enter the washing liquid tank through the air inlet pipe and the liquid return pipe.

5. In the present invention, a plurality of air return chambers and a plurality of fans are provided to reduce the partial suction phenomenon, so that the working effect and efficiency of the cyclone participating in the work can be fully exerted, and the service life of the dust collector can be extended.

6. The maintenance port and overflow port of the water tank described in the present invention are for maintaining and repairing the water tank and preventing the water level in the water tank from being too high and damaging the device.

7. The automatic replenishment valve of the present invention is to maintain the bottom water level of the water tank, the separation tank and the clean water tank. Since the water tank, the separation tank and the clean water tank are connected to each other, the water levels of the three tanks are almost the same.

8. The cylindrical surrounding fluid described in the present invention is arranged at the position where the bottom of the separation box is connected with the sewage pipe, so that the sewage flowing in through the sewage pipe can generate circumventing flow resistance and reduce the speed of sewage.

9. The ash collecting tank 161 in the present invention is arranged upwardly, so as to collect the dust particles after the dust particles settle, and at the same time avoid the turbulent flow at the bottom of the box to make the dust particles float in the water again.

10. The design of the baffle plate in the separation box of the present invention is to form a flow-around structure. During the flow-around process, most of the dust settles into the ash collection tank of the separation tank due to gravity.

11. The inclined setting of the secondary filter screen in the present invention is to reduce the clogging of the filter screen.

12. The bottom plate of the box body in the present invention is arranged obliquely, so that the dust falling into the water enters the separation box.

13. The setting of the valve body in the present invention is to adjust the flow and velocity of the circulating water.

Description of drawings

Fig. 1 is a schematic structural view of a liquid film multi-pipe cyclone dust collector according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the structure of the impeller in the cyclone according to an embodiment of the present invention;

Fig. 3 is a schematic structural view of a cyclone according to an embodiment of the present invention;

Fig. 4 is an enlarged view of I in Fig. 3 .

In the figure: 1. exhaust pipe, 2. deflector, 3. upper part of cylinder, 4. baffle, 5. overflow hole, 6. sewage pipe, 7. overflow tank, 8. lower part of cylinder, 9. Whirlwind cone, 10. Water tank maintenance port and overflow port, 11. Water tank, 12. Box bottom plate, 13. Sewage pipe, 14. Cylindrical surrounding fluid, 15. Separation tank maintenance port, 16. Baffle plate, 161. Ash collection tank, 17. Separation box sewage outlet, 18. Separation box, 19. Primary filter screen, 20. Secondary filter screen, 21. Clean water tank, 22. Automatic water replenishment valve, 23, Circulation pump, 24 , water supply pipe, 25, valve body, 26, air inlet chamber, 27, air return chamber, 28, fan, 29, partition, 30, upper partition, 31, air inlet pipe, 32, sprinkler head, 33, Liquid return pipe, 34, washing liquid tank.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

Figure 1 shows an embodiment of the liquid film multi-pipe cyclone dust collector of the present invention, the liquid film multi-pipe cyclone dust collector includes a box body, a liquid film multi-pipe cyclone dust removal assembly, and a separation and purification device .

As shown in Figures 2, 3 and 4, the liquid film multi-pipe cyclone dedusting assembly includes at least two water film cyclones, overflow tank 7 and air inlet pipe 31; water film cyclone and overflow tank 7 are installed in In the box; the water film type cyclone includes an exhaust pipe 1, a plurality of deflectors 2, an upper part of the cylinder 3, a lower part of the cylinder 8 and a cyclone cone 9; the exhaust pipe 1 One end extends into the upper part 3 of the cylinder from the top of the upper part 3 of the cylinder, the deflector 2 is distributed between the upper part 3 of the cylinder and the exhaust pipe 1, and one end is connected to the inner wall of the upper part 3 of the cylinder The other end is fixedly connected with the exhaust pipe 1; the deflector 2 is fixedly connected with the upper part 3 of the cylinder to form an impeller shape, and the exhaust pipe 1 is located in the middle of the impeller shape. The lower end of the outer surface of the upper part 3 of the cylinder body is fixedly connected to the baffle plate 4, the baffle plate 4 is annular, the baffle plate 4 can form a liquid seal with the lower part 8 of the cylinder body, and the lower part 8 of the cylinder body and the cylinder body The inner wall of the upper part 3 forms an annular overflow hole 5; the periphery of the upper opening of the lower part 8 of the cylinder is fixedly connected with the overflow tank 7; the bottom of the cyclone cone 9 is fixedly provided with an ash discharge pipe 6.

The upper part of the box body is provided with an upper partition 30, and the overflow tank 7 is located below the upper partition 30. Between the top of the box and the upper partition 30 is a return air cavity 27, and between the upper partition 30 and the overflow tank 7 It is the air inlet cavity 26, and the water tank 11 is between the overflow tank 7 and the bottom plate of the box body 12; the other end of the exhaust pipe 1 enters the return air cavity 27 through the upper partition 30; A dividing plate 29 forms a plurality of air return chambers 27, thereby separating the exhaust pipes 1 of each group of cyclone subgroups; the air return chamber 27 and the blower fan 28 can be designed according to actual conditions. A blower fan 28 is arranged at the top of each return air cavity 27 . The side above the liquid level of the water tank 11 is provided with a water tank maintenance port and an overflow port 10 . Described blowdown pipe 6 extends below the liquid level of water tank 11, can form liquid seal; Described box body bottom plate 12 is inclined to be arranged, and the inclination direction is partial to the separation box 18 of separation and purification device; The bottom of box body is provided with sewage pipe 13, box The body is communicated with the separation box 18 of the separation and purification device through the sewage pipe 13.

The air inlet pipe 31 is arranged on the side of the air inlet cavity 26 and above the liquid level of the overflow tank 7 . The air inlet pipe 31 is V-shaped; several spray heads 32 are arranged in a section of the air inlet pipe 31 close to the air inlet chamber 26; the bottom of the air inlet pipe 31 is provided with a liquid return pipe 33; the liquid return pipe 33 The lower end of the lower end stretches below the liquid level of the washing liquid tank 34. The material of the preferred washing liquid box 34 can be selected according to the chemical properties of the washing liquid, and the size is enough to hold the used washing liquid of the dust remover once.

Described separating and purifying device comprises separating box 18 and clean water tank 21; Described separating box 18 comprises cylindrical surrounding fluid 14, a plurality of baffle plates 16, ash collection tank 161, separating box blowdown outlet 17, primary filter screen 19, Secondary filter screen 20. The cylindrical surrounding fluid 14 is arranged at the position where the bottom of the separation box 18 communicates with the sewage pipe 13, the ash collecting tank 161 is arranged above the cylindrical surrounding fluid 14, and one end is connected with the inner wall of the separation box 18, and the separating The box sewage outlet 17 is arranged on the top of the ash collecting tank 161; one end of the baffle plate 16 is respectively connected with the inner wall of the separation box 18, alternately arranged in the separation box 18, and the other end is inclined downward; several can be set according to the actual situation. A primary filter screen 19 is arranged on the upper part of the separation box 18 to separate larger dust particles; preferably, the primary filter screen 19 and the secondary filter screen 20 are textile fiber filter screens. The bottom side of the separation box 18 is provided with a maintenance opening 15 for the separation box; the maintenance opening 15 for the separation box.

The separation box 18 is arranged adjacent to the clean water tank 21, and communicates with the secondary filter screen 20. One end of the secondary filter screen 20 is arranged on the upper part of the separation box 18 and the clean water tank 21 partition, and the other end is biased towards separation. Case 18 direction is inclined to arrange.

A water supply system is arranged above the overflow tank 7; the water supply system includes a water supply pipe 24 and a circulation pump 23; , the circulation pump 23 is arranged on the water supply pipe 24 and is located between the valve body 25 and the clean water tank 21 .

The separation box 18 and the top of the clean water tank 21 are provided with openings.

The clean water tank 21 is provided with an automatic replenishment valve 22 to maintain the lowest liquid level.

Working principle of the present invention is:

During the process of smoke passing through the air inlet pipe 31, the spray head 32 sprays out a spray of cleaning liquid. The cleaning liquid can be selected according to the nature of the smoke, usually to remove toxic chemicals in the smoke or to gather tiny dust particles in the gas, and at the same time reduce the high temperature. The temperature of the air can effectively improve the purification effect. Excessive washing liquid droplets can fall onto the air inlet pipe 31 , and flow back into the washing liquid tank 34 via the air inlet pipe 31 and the liquid return pipe 33 . When the smoke and dust enter the air inlet cavity 26, the smoke and dust will form a swirling airflow in the cyclone through the cyclone impeller deflector 2. Since the water supply pipe 24 continuously supplies water to the overflow tank 7, the water in the overflow tank 7 will pass through the overflow. The holes 5 form a uniform thin water film in the cyclone. When the dust particles are thrown to the wall of the cyclone due to the centrifugal force, the water film captures and flows into the water tank 11, thereby improving the dust removal efficiency. When the swirling air flow reaches the cyclone sub-cone 9 , an internal swirling air flow is formed from bottom to top, and is discharged into multiple return air chambers 26 through the exhaust pipe 1 . The dust particles in the water tank 11 will flow into the separation box 18 due to gravity, and most of the dust will settle to the bottom of the ash collection tank 161 in the separation box 16 due to gravity during the bypass flow of the sewage in the separation box 18. Therefore, the water quality in the upper part of the separation tank 18 is relatively clean, and through the effect of the secondary filter screen 20, the water in the clean water tank 21 can meet the requirements for recycling. When the dust collector stops working, the dust particles collected in the dust collector can be discharged through the separation box maintenance port 15 and the separation box sewage discharge port 17.

The series of detailed descriptions listed above are only specific descriptions for feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiment or All changes should be included within the protection scope of the present invention.

Claims (10)

1. A liquid-film multi-pipe cyclone dust collector, characterized in that it comprises a casing, a liquid-film multi-pipe cyclone dust removal assembly, and a separation and purification device; The liquid film multi-pipe cyclone dedusting assembly includes at least two water film cyclones, an overflow tank (7) and an air inlet pipe (31); the water film cyclone and the overflow tank (7) are installed in the box ; The water film type cyclone includes an exhaust pipe (1), a plurality of deflectors (2), the upper part of the cylinder (3), the lower part of the cylinder (8) and the cyclone cone (9); One end of the exhaust pipe (1) extends into the upper part of the cylinder (3) from the top of the upper part of the cylinder (3), and the upper part of the cylinder (3) where the deflector (2) is distributed Between the trachea (1), and one end is connected with the inner wall of the upper part of the cylinder (3), and the other end is connected with the exhaust pipe (1); the lower end of the upper part of the cylinder (3) is provided with a baffle (4 ), the baffle (4) is annular, and the baffle (4) can form a liquid seal with the lower part of the cylinder (8), and the lower part of the cylinder (8) and the inner wall of the upper part of the cylinder (3) form An annular overflow hole (5); the upper opening edge of the lower part of the cylinder (8) is connected to the overflow tank (7); the bottom of the cyclone cone (9) is provided with an ash discharge pipe (6); An upper partition (30) is arranged on the upper part of the box body, the overflow tank (7) is located under the upper partition (30), and the return air cavity (27) is between the top of the cabinet and the upper partition (30). Between the upper partition (30) and the overflow tank (7) is the air inlet chamber (26), between the overflow tank (7) and the bottom plate of the box body (12) is the water tank (11); the exhaust pipe (1) The other end enters the return air chamber (27) through the upper partition (30); a plurality of partitions (29) are designed in the return air chamber (27) to form a plurality of return air chambers (27). A blower fan (28) is arranged on the top of the air return cavity (27); The sewage pipe (6) extends below the liquid level of the water tank (11); the bottom of the box is provided with a sewage pipe (13), and the box communicates with the separation and purification device through the sewage pipe (13); A water supply system is arranged above the overflow tank (7); The air inlet pipe (31) is arranged on the side of the air inlet chamber (26) and above the liquid level of the overflow tank (7). 2. A kind of liquid film type multi-pipe cyclone dust collector according to claim 1, is characterized in that, described separation and purification device comprises separation box (18) and clean water tank (21); The separation box (18) includes a cylindrical surrounding fluid (14), a plurality of baffles (16), an ash collection tank (161), a separation box sewage outlet (17), a primary filter (19), a secondary filter net(20); The cylindrical surrounding fluid (14) is arranged at the position where the bottom of the separation box (18) communicates with the sewage pipe (13), the ash collecting tank (161) is arranged above the cylindrical surrounding fluid (14), and one end It is connected with the inner wall of the separation box (18), and the sewage outlet (17) of the separation box is arranged above the ash collection tank (161); one end of the baffle plate (16) is respectively connected with the inner wall of the separation box (18), and is alternately arranged on the separation In the box (18), and the other end is inclined downward; a first-stage filter screen (19) is set at the upper part of the separation box (18); The separation box (18) is communicated with the clean water tank (21) by a secondary filter screen (20), and one end of the secondary filter screen (20) is arranged between the separation box (18) and the clean water tank (21) dividing plate upper part. 3. A liquid film multi-pipe cyclone dust collector according to claim 2, characterized in that the bottom plate (12) of the box body is arranged obliquely, and the inclination direction is biased toward the separation box (18). 4. A liquid film multi-pipe cyclone dust collector according to claim 2, characterized in that, the other end of the secondary filter screen (20) is inclined to the direction of the separation box (18). 5. A kind of liquid film type multi-pipe cyclone dust collector according to claim 1, is characterized in that, also comprises several shower heads (32), and described shower head (32) is arranged on the air inlet cavity (26 ) into a section of the air inlet pipe (31); The air inlet pipe (31) is V-shaped; the bottom of the air inlet pipe (31) is provided with a liquid return pipe (33); the lower end of the liquid return pipe (33) extends into the liquid of the washing liquid tank (34). below the face. 6. a kind of liquid film type multi-pipe cyclone dust collector according to claim 2, is characterized in that, described water supply system comprises water supply pipe (24) and circulation pump (23); The air inlet chamber (26) is connected to the clean water tank (21) through a water supply pipe (24), the valve body (25) is arranged on the water supply pipe (24), and the water supply pipe (24) is arranged on the circulating pump (23). on, and between the valve body (25) and the clean water tank (21). 7. A liquid film multi-pipe cyclone dust collector according to claim 2, characterized in that, said primary filter screen (19) and secondary filter screen (20) are textile fiber filter screens. 8. A kind of liquid film type multi-pipe cyclone dust collector according to claim 1, is characterized in that, also comprises water tank maintenance port and overflow port (10), separation tank maintenance port (15); The water tank maintenance port and overflow port (10) are arranged on the side above the liquid level of the water tank (11); the separation box maintenance port (15) is arranged on the bottom side of the separation box (18). 9. A liquid film multi-pipe cyclone dust collector according to claim 1, characterized in that the upper part of the separation box (18) and the clean water tank (21) is provided with an opening. 10. A liquid film multi-pipe cyclone dust collector according to claim 1, characterized in that the clean water tank (21) is provided with an automatic water replenishment valve (22).