Efficient waste gas treatment device for superfine slag powder production

Abstract

The utility model discloses an efficient waste gas treatment device for superfine slag powder production, which comprises an exhaust pipe, the gas outlet end of the exhaust pipe is connected with a waste gas treatment device, the waste gas treatment device is divided into a gravity dust removal chamber, a discharge dust removal chamber and a spray dust removal chamber by middle partition plates, and a plurality of turbulent flow conical covers are mounted in the gravity dust removal chamber in a vertically staggered manner; at least three cathode electrode plates are annularly arranged in the discharge dust removal chamber at intervals, an anode dust collection barrel is arranged on the inner sides of the cathode electrode plates, a plurality of filtering holes are formed in the barrel wall of the anode dust collection barrel, dust collection conical hoppers are arranged at the bottoms of the gravity dust removal chamber and the discharge dust removal chamber, an exhaust pipe is arranged at the top of the spray dust removal chamber, and a spray pipe is arranged in the spray dust removal chamber. A blow-off pipe is arranged at the bottom. The device not only can effectively intercept micro-powder particles with different sizes in waste gas, improve the dust removal and purification effect of the waste gas and improve the purification efficiency, but also can recover the intercepted micro-powder and avoid the phenomenon of loss of the micro-powder.

Description

Technical Field

[0001] The utility model belongs to the technical field of solid waste resource treatment and processing, and specifically relates to a waste gas high-efficiency treatment device for slag micro-powder production. Background Art

[0002] Slag powder is a by-product, mainly derived from metallurgy, chemical industry, electric power and other production fields. In these industries, ironmaking, steelmaking, electrolytic aluminum and other processes are often required. These processes will produce a large amount of high-temperature molten materials, including slag, smelting slag and slag. These materials are crushed into powder after cooling to form slag powder. The main components of slag powder are oxides, silicates, etc., which contain a large amount of active silicates, with good cement properties and high strength. It is mainly added to cement or concrete. As a new admixture for high-performance concrete, it can improve the durability of concrete, resistance to seawater erosion, reduce hydration heat and other properties, and can reduce the amount of cement clinker in concrete. And every ton of slag powder used to replace silicate cement can reduce 0.77 tons of carbon emissions, and the comprehensive emissions are less than 10% of cement. It can be inferred that slag powder has broad market prospects in the future. At present, the process flow of slag micro powder production line mainly includes feeding, conveying, drying, grinding, storage and other processes. In the above-mentioned drying and grinding processes, a large amount of dust-containing tail gas will be generated. If these tail gases are not purified, they will not only affect the surrounding environment, but also damage human health, and at the same time cause the loss of slag micro powder. In the existing technology, slag production lines are usually equipped with bag dust collectors for dust treatment. Since the particle size of slag micro powder is micron-level, when using bag dust collectors for dust removal, dust is easy to adhere to the outer end of the filter bag, resulting in a decrease in the filtration efficiency of the filter bag. After the device stops working, the internal filter bag needs to be replaced or the filter bag needs to be inflated by a pulse blowing device to clean the dust on the filter bag. During the cleaning process, the device stops running, which not only takes a long time, but also leads to a low cleaning efficiency of the device, and the dust in the device is not easy to collect and discharge, resulting in the loss of dust. Therefore, it is an objective need to develop an efficient waste gas treatment device for slag micropowder production which has a reasonable structural design, low operating cost, can effectively improve the tail gas purification efficiency, and can reduce the loss of micropowder. Summary of the invention

[0003] The utility model aims to provide a high-efficiency waste gas treatment device for slag micro-powder production, which has a reasonable structural design, low operating cost, can effectively improve the tail gas purification efficiency, and can reduce the loss of micro-powder.

[0004] The purpose of the utility model is achieved in this way, including an exhaust pipe, the air outlet end of the exhaust pipe is connected to the exhaust gas processor, the internal interval of the exhaust gas processor is installed with two middle partitions, the upper part of each middle partition is provided with air guide holes, the middle partition divides the inner cavity of the exhaust gas processor into a gravity dust removal chamber, a discharge dust removal chamber and a spray dust removal chamber in sequence, a plurality of spoiler cone covers are installed alternately up and down in the gravity dust removal chamber, at least three cathode electrode plates are arranged circumferentially in the discharge dust removal chamber, the cathode electrode plate is installed on the top of the gravity dust removal chamber through a hanging frame, an anode dust collecting cylinder is arranged on the inner side of the cathode electrode plate, the top of the anode dust collecting cylinder is installed on the top of the gravity dust removal chamber through a supporting frame, a plurality of filter holes are processed on the cylinder wall of the anode dust collecting cylinder, the bottom of the gravity dust removal chamber and the discharge dust removal chamber are both provided with dust collecting cone hoppers, the top of the spray dust removal chamber is provided with a discharge pipe, a spray pipe is provided inside, and a sewage pipe is provided at the bottom.

[0005] Compared with the traditional bag dust collector, the advantages of this device are: first, this device uses a gravity dust removal chamber to perform gravity dust removal on the generated exhaust gas. Under the condition of deceleration and change of flow direction of the spoiler component, part of the dust in the exhaust gas can be filtered and separated by the principle of gravity separation; second, the discharge dust removal chamber of this device performs discharge dust removal on the exhaust gas. The electric field generated by the cathode electrode plate makes the dust in the exhaust gas negatively charged. When the negatively charged dust passes through the positively charged anode adsorption cylinder, according to the principle of opposites attract, more than 80% of the dust in the exhaust gas is adsorbed on the anode adsorption cylinder, and finally falls into the dust collecting cone bucket, thereby achieving the purpose of discharge dust removal; third, the spray dust removal chamber set in this device can perform the final spray washing on the exhaust gas, purify and separate the dust and water-soluble gas mixed in the exhaust gas at one time, and effectively improve the exhaust gas purification efficiency. In summary, this device adopts a combination of gravity dust removal, discharge dust removal and spray dust removal, which can not only effectively intercept micropowder particles of different sizes in the exhaust gas, improve the effect of exhaust gas dust removal and purification, and improve the purification efficiency, but also can recover the intercepted micropowder, avoiding the loss of micropowder. It has good use effect and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0007] Figure 2 It is a top sectional view of the discharge dust removal chamber 5 in the utility model;

[0008] In the figure: 1-exhaust pipe, 2-exhaust gas processor, 3-middle partition, 4-gravity dust removal chamber, 41-turbulator cone cover, 5-discharge dust removal chamber, 51-cathode electrode plate, 52-anode dust collecting cylinder, 53-driving motor, 54-blowing pipe, 6-spray dust removal chamber, 61-discharge pipe, 62-drain pipe, 63-vertical partition, 64-spray chamber, 65-gas-liquid separation chamber, 66-spray pipe, 67-baffle, 68-first gas-liquid separation component, 69-first gas-liquid separation component, 7-dust collecting cone hopper, 9-sedimentation tank, 91-horizontal partition, 92-drain pipe, 93-overflow plate, 94-sludge chamber, 95-clean water chamber, 96-circulation pipe, 97-separation plate, 10-insulation layer. DETAILED DESCRIPTION

[0009] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention belong to the protection scope of the present invention.

[0010] like Figures 1-2 As shown, the utility model includes an exhaust pipe 1, and all the exhaust gas generated in the slag powder production workshop is discharged through the exhaust pipe. The exhaust end of the exhaust pipe 1 is connected to the exhaust gas processor 2, and two middle partitions 3 are installed at the internal interval of the exhaust gas processor 2. The upper part of each middle partition 3 is provided with an air guide hole, and the middle partition 3 divides the inner cavity of the exhaust gas processor 2 into a gravity dust removal chamber 4, a discharge dust removal chamber 5 and a spray dust removal chamber 6 in sequence. The air guide holes connect the gravity dust removal chamber 4, the discharge dust removal chamber 5 and the spray dust removal chamber 6. A plurality of spoiler cone covers 41 are installed in an upper and lower staggered manner in the gravity dust removal chamber 4. The interface shape of the spoiler cone cover 41 is conical. The spoiler cone cover 41 can slow down the flow speed of the exhaust gas and change the flow direction of the exhaust gas. By slowing down and changing the direction, The dust particles in the exhaust gas are separated by gravity. At least three cathode electrode plates 51 are arranged at intervals in annular direction in the discharge dust removal chamber 5. The cathode electrode plates 51 are installed on the top of the gravity dust removal chamber 4 through a hanging frame. The cross-sectional shape of the cathode electrode plates 51 is arc-shaped. An anode dust collecting cylinder 52 is arranged on the inner side of the cathode electrode plate 51. The top of the anode dust collecting cylinder 52 is installed on the top of the gravity dust removal chamber 4 through a supporting frame. A plurality of filter holes are processed on the cylinder wall of the anode dust collecting cylinder 52. Power connectors are provided on the cathode electrode plates 51 and the anode dust collecting cylinder 52. Dust collecting cones 7 are provided at the bottom of the gravity dust removal chamber 4 and the discharge dust removal chamber 5. A discharge pipe 61 is provided on the top of the spray dust removal chamber 6, a spray pipe 66 is provided inside, and a sewage pipe 62 is provided at the bottom.

[0011] The use process of this device is as follows: the exhaust gas discharged from the exhaust pipe 1 first enters the gravity dust removal chamber 4, and under the condition of deceleration and change of flow direction of the spoiler component 41, a part of the dust in the exhaust gas can be filtered and separated by the principle of gravity separation. The exhaust gas filtered and separated by the gravity dust removal chamber 4 enters the discharge dust removal chamber 5, and the power connectors of the cathode electrode plate 51 and the anode dust collecting cylinder 52 are connected to the power supply. At this time, the electric field generated by the cathode electrode plate 51 makes the dust in the exhaust gas negatively charged. When the negatively charged dust passes through the positively charged anode adsorption cylinder 52, according to the principle of opposites attract, more than 80% of the dust in the exhaust gas is adsorbed on the anode adsorption cylinder 52 As more dust is adsorbed, the dust will fall into the dust collecting cone 7 by gravity, thus achieving the purpose of discharge dust removal. The tail gas after discharge dust removal enters the spray dust removal chamber 6. The spray pipe 66 can perform the final spray washing on the waste gas, purify and separate the dust and water-soluble gas mixed in the waste gas at one time, and effectively improve the tail gas purification efficiency. The waste gas after spray treatment is discharged from the discharge pipe 61, and the sewage after spray washing is discharged from the sewage pipe 62. In order to improve the efficiency and convenience of the use of the device, control valves can be set on the dust collecting cone 7, the discharge pipe 61 and the sewage pipe 62 according to the needs of use to achieve precise control of the discharge. In summary, the device adopts the combination of gravity dust removal, discharge dust removal and spray dust removal, which can not only effectively intercept micro powder particles of different sizes in the waste gas, improve the effect of waste gas dust removal and purification, and improve the purification efficiency, but also can recycle the intercepted micro powder, avoiding the loss of micro powder, and has a good use effect and is easy to promote and use.

[0012] In order to improve the effect of discharge dust removal in the discharge dust removal chamber 5, a drive motor 53 is installed on the top of the discharge dust removal chamber 5. The output shaft of the drive motor 53 is fixedly connected to the support frame. The drive motor 53 is the structure used in the prior art and can be directly purchased as a finished product according to the needs of use. The drive motor 53 drives the anode dust collecting cylinder 52 to rotate. During the rotation of the anode dust collecting cylinder 52, the frequency of dust colliding with the anode dust collecting cylinder 52 can be increased, thereby increasing the probability of dust capture and thereby improving the efficiency of exhaust gas dust removal.

[0013] In order to improve the dust removal efficiency in the discharge dust removal chamber 5, a cleaning component is arranged in the space between the anode dust collecting cylinder 52 and the cathode electrode plate 51, and the cleaning component includes 3 to 6 blowing pipes 54 evenly installed between the anode dust collecting cylinder 52 and the cathode electrode plate 51. The upper end of the blowing pipe 54 is connected to an air pump mechanism. The air pump mechanism is a structure used in the prior art, which can transport high-pressure air into the blowing pipe 54. The lower end of the blowing pipe 54 is sealed by an end plate, and a plurality of blowing holes are arranged at equal intervals on the blowing pipe 54 facing the side of the anode dust collecting cylinder 52. After the anode dust collecting cylinder 52 has been used for a period of time, the anode dust collecting cylinder 52 can be purged by using the blowing pipe 54 to avoid clogging of the filter holes on the anode dust collecting cylinder 52 and affecting the dust removal efficiency.

[0014] Furthermore, in order to achieve efficient dust removal, a sedimentation tank 9 is provided at the bottom of the spray dust removal chamber 6, and a vertical partition 63 is installed inside the spray dust removal chamber 6. The vertical partition 63 divides the inner cavity of the spray dust removal chamber 6 into a spray chamber 64 and a gas-liquid separation chamber 65. A spray pipe 66 is provided at the top of the spray chamber 64. The bottoms of the spray chamber 64 and the gas-liquid separation chamber 65 are both provided with connecting holes connected to the sedimentation tank 9. A plurality of baffles 67 are staggered up and down inside the spray chamber 64. The gas-liquid separation chamber 65 is provided with a first gas-liquid separation component 68 and a second gas-liquid separation component 69 from bottom to top. The discharge pipe 61 is provided at the top of the gas-liquid separation chamber 65. The waste gas treated by over-discharge dust removal first enters the spray chamber 64. After the cold water sprayed from the spray pipe 66 is mixed with the waste gas, when it flows through multiple baffles 67, the cold water can form multiple water curtains in the spray chamber 64. The waste gas can be effectively washed by the water curtain, and the dust and water-soluble gas mixed in the waste gas can be purified and separated at one time. The waste gas and cold water after washing and spraying enter the sedimentation tank 9, and the waste gas enters the gas-liquid separation chamber 65. After separation by the first gas-liquid separation component 68 and the second gas-liquid separation component 69, the moisture in the waste gas is completely separated, and the waste gas with the moisture separated is discharged from the discharge pipe 61, and the sewage gathered in the sedimentation tank 9 is discharged from the sewage pipe 62.

[0015] Preferably, in order to achieve efficient separation of moisture in the exhaust gas, the first gas-liquid separation component 68 includes a plurality of corrugated plates vertically spaced apart and installed in the gas-liquid separation chamber 65, and the second gas-liquid separation component 69 is a cone fixedly installed on the inner wall of the gas-liquid separation chamber 65, and a plurality of separation circular holes are evenly distributed on the cone.

[0016] Preferably, in order to avoid the waste of water resources and realize the recycling of water resources, a horizontal partition 91 is installed inside the sedimentation tank 9, a drain pipe 92 is installed on the horizontal partition 91 located at the lower part of the gas-liquid separation chamber 65, and an overflow plate 93 is vertically installed inside the sedimentation tank 9 at the lower side of the horizontal partition 91, and a gap is left between the upper part of the overflow plate 93 and the horizontal partition 91. The overflow plate 93 divides the lower part of the sedimentation tank 9 into a sludge chamber 94 and a clean water chamber 95, and the drain pipe 62 is arranged in the sludge chamber 94. 4, a circulation pipe 96 is arranged on the clean water chamber 95, and the circulation pipe 96 is connected with the spray pipe 66. The sewage entering the sedimentation tank 9 from the spray chamber 64 is buffered by the horizontal partition 91, and then enters the sludge chamber 94 through the drainage pipe 92. After sedimentation, the fine powder of the sewage is precipitated at the bottom of the sludge chamber 94, and the clean water after precipitation overflows into the clean water chamber 95, and can be returned to the spray pipe 66 for recycling through the circulation pipe 96, so that the spray water can be saved and the operation cost of the device can be reduced.

[0017] Preferably, in order to introduce the waste gas into the gas-liquid separation chamber 65 in a timely manner, a separation plate 97 is obliquely installed in the sedimentation tank 9 on the upper side of the horizontal partition 91. The separation plate 97 is located on the lower side of the gas-liquid separation chamber 65. The higher end of the separation plate 97 is fixedly connected to the inner wall of the sedimentation tank 9, and the lower end of the separation plate 97 is suspended with a gap between it and the horizontal partition 91. The separation plate 97 can separate the waste gas and sewage, making it convenient to introduce the waste gas into the gas-liquid separation chamber 65 in a timely manner for gas-liquid separation treatment.

[0018] In order to prevent the discharge dust removal chamber 5 from leaking electricity during operation and improve the safety of the device, an insulating layer 10 is provided on the outer side of the exhaust gas processor 2 .

Claims

1. A highly efficient waste gas treatment device for slag micro powder production, comprising an exhaust pipe (1), characterized in that: The exhaust pipe (1) is connected to an exhaust gas processor (2) at an outlet end thereof. Two intermediate partitions (3) are installed at intervals inside the exhaust gas processor (2). An air guide hole is provided at the top of each intermediate partition (3). The intermediate partitions (3) divide the inner cavity of the exhaust gas processor (2) into a gravity dust removal chamber (4), a discharge dust removal chamber (5) and a spray dust removal chamber (6) in sequence. A plurality of spoiler cones (41) are installed in an alternating manner up and down in the gravity dust removal chamber (4). At least three cathode electrode plates (51) are arranged in an annular manner in the discharge dust removal chamber (5). The plate (51) is installed on the top of the gravity dust removal chamber (4) through a hanging frame, an anode dust collecting cylinder (52) is arranged on the inner side of the cathode electrode plate (51), the top of the anode dust collecting cylinder (52) is installed on the top of the gravity dust removal chamber (4) through a supporting frame, and a plurality of filter holes are processed on the cylinder wall of the anode dust collecting cylinder (52), the bottoms of the gravity dust removal chamber (4) and the discharge dust removal chamber (5) are both provided with dust collecting cones (7), the top of the spray dust removal chamber (6) is provided with a discharge pipe (61), a spray pipe (66) is provided inside, and a sewage pipe (62) is provided at the bottom.

2. The high-efficiency waste gas treatment device for slag micropowder production according to claim 1 is characterized by: A driving motor (53) is installed on the top of the discharge dust removal chamber (5), and the output shaft of the driving motor (53) is fixedly connected to the support frame.

3. The high-efficiency waste gas treatment device for slag micropowder production according to claim 2 is characterized by: A cleaning component is arranged in the space between the anode dust collecting cylinder (52) and the cathode electrode plate (51), and the cleaning component includes 3 to 6 blowing pipes (54) evenly installed between the anode dust collecting cylinder (52) and the cathode electrode plate (51), the upper end of the blowing pipe (54) is connected to an air pump mechanism, the lower end of the blowing pipe (54) is sealed by an end plate, and a plurality of blowing holes are arranged at equal intervals up and down on the blowing pipe (54) facing the side of the anode dust collecting cylinder (52).

4. The high-efficiency waste gas treatment device for slag micropowder production according to claim 1 is characterized by: A sedimentation tank (9) is arranged at the bottom of the spray dust removal chamber (6), a vertical partition (63) is installed inside the spray dust removal chamber (6), and the vertical partition (63) divides the inner cavity of the spray dust removal chamber (6) into a spray chamber (64) and a gas-liquid separation chamber (65). A spray pipe (66) is arranged at the top of the spray chamber (64), and the bottoms of the spray chamber (64) and the gas-liquid separation chamber (65) are both provided with connecting holes connected to the sedimentation tank (9). A plurality of baffles (67) are staggeredly installed up and down inside the spray chamber (64), and a first gas-liquid separation component (68) and a second gas-liquid separation component (69) are arranged in sequence from bottom to top inside the gas-liquid separation chamber (65), and a discharge pipe (61) is arranged at the top of the gas-liquid separation chamber (65).

5. The high-efficiency waste gas treatment device for slag micropowder production according to claim 4 is characterized by: The first gas-liquid separation component (68) comprises a plurality of corrugated plates vertically installed in the gas-liquid separation chamber (65) at intervals.

6. The high-efficiency waste gas treatment device for slag micropowder production according to claim 4 is characterized by: The second gas-liquid separation component (69) is a cone fixedly mounted on the inner wall of the gas-liquid separation chamber (65), and a plurality of separation circular holes are evenly distributed on the cone.

7. The high-efficiency waste gas treatment device for slag micropowder production according to claim 4 is characterized by: A horizontal partition (91) is installed inside the sedimentation tank (9), a drainage pipe (92) is installed on the horizontal partition (91) located at the lower part of the gas-liquid separation chamber (65), an overflow plate (93) is vertically installed inside the sedimentation tank (9) below the horizontal partition (91), a gap is left between the upper part of the overflow plate (93) and the horizontal partition (91), the overflow plate (93) divides the lower part of the sedimentation tank (9) into a sludge chamber (94) and a clean water chamber (95), the drainage pipe (62) is arranged at the bottom of the sludge chamber (94), and a circulation pipe (96) is arranged on the clean water chamber (95), and the circulation pipe (96) is connected to the spray pipe (66).

8. The high-efficiency waste gas treatment device for slag micropowder production according to claim 7, characterized in that: A separation plate (97) is obliquely installed in the sedimentation tank (9) on the upper side of the horizontal partition (91). The separation plate (97) is located on the lower side of the gas-liquid separation chamber (65). The higher end of the separation plate (97) is fixedly connected to the inner wall of the sedimentation tank (9), and the lower end of the separation plate (97) is suspended in the air with a gap between it and the horizontal partition (91).

9. The high-efficiency waste gas treatment device for slag micropowder production according to claim 1, characterized in that: An insulating layer (10) is provided on the outer side of the exhaust gas processor (2).

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