Wet powder conveying device

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to a wet powder conveying device. Comprising a tank body, a feeding pipe is fixedly connected to the position, close to the top end, of one side of the tank body, a transfer box is fixedly connected to the position, close to the bottom end, of the other side of the tank body, a communicating groove is formed in the side wall of the tank body, and a filter screen plate is fixedly connected to the inner wall of the communicating groove. When the feeding pump pumps lime slurry into a pipeline of the flue gas desulfurization device, lime blocks are prevented from being sucked by the feeding pump through filtration of the filter screen plate, the filter screen plate blocks the lime blocks into the tank body, meanwhile, the main shaft drives the stirring blades to rotate, the lime blocks in the tank body and the lime slurry are stirred and mixed, and the lime blocks are prevented from being blocked by the stirring blades. And the main shaft drives the two groups of cleaning rods to alternately dredge the filter holes of the filter screen plate, so that the filter holes of the filter screen plate are prevented from being blocked by the lime cakes, and the lime cakes are prevented from blocking a pipeline of the flue gas desulfurization device.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, and specifically to a wet powder conveying device. Background Art

[0002] The limestone wet flue gas desulfurization system is a desulfurization technology that uses limestone slurry to absorb sulfur dioxide in flue gas. Sulfur dioxide dissolves in water to form an acidic solution. According to the principle of acid-base neutralization, an alkaline substance reacts with the acidic substance formed by sulfur dioxide dissolving in water to make the reaction equilibrium shift forward, that is, the reaction of sulfur dioxide dissolving in water proceeds forward. In the currently operating limestone wet flue gas desulfurization system, the limestone slurry is first pumped into the slurry pool at the bottom of the desulfurization tower. The agitator in the desulfurization tower stirs the slurry, and then it is pumped into the spray layer through the slurry circulation pump to absorb sulfur dioxide in the flue gas.

[0003] The limestone slurry is a viscous slurry formed by mixing water and lime. Since the density of lime is greater than that of water, the lime in the lime slurry that has been standing still for a long time will precipitate and form lime lumps. When the circulation pump transports the lime slurry mixed with lime lumps to the spray layer of the flue gas desulfurization device, the lime lumps are likely to block the small-diameter pipes of the spray layer, affecting the normal operation of the flue gas desulfurization equipment. In view of this, we propose a wet powder conveying device. Summary of the Invention

[0004] The purpose of the utility model is to provide a wet powder conveying device to solve the problems raised in the above background art.

[0005] To achieve the above object, one of the objects of the present utility model is to provide a wet powder conveying device, which includes a tank body. A feed pipe is fixedly connected to a position near the top of one side of the tank body. A transfer box is fixedly connected to a position near the bottom of the other side of the tank body. A communication groove is formed on the side wall of the tank body. A filter screen plate is fixedly connected to the inner wall of the communication groove. A plurality of filter holes are formed on the filter screen plate. The filter holes connect the interiors of the tank body and the transfer box. A feeding pump is fixedly connected to a side of the transfer box away from the tank body. A pumping pipe is fixedly connected to one side of the feeding pump. One end of the pumping pipe penetrates through the side wall of the transfer box and extends into the interior of the transfer box. An outlet pipe is fixedly connected to the top of the feeding pump. A motor is fixedly connected to the top of the tank body. The lower end of the output shaft of the motor extends into the interior of the tank body and is coaxially fixedly connected to a main shaft. The lower end of the main shaft is rotatably arranged on the bottom surface inside the tank body. Two movable plates are arranged inside the tank body. A plurality of cleaning rods are fixedly connected to a side of the movable plate close to the filter screen plate. The cleaning rods are arranged corresponding to the plurality of filter holes. A driving mechanism is arranged between the two movable plates and the main shaft. When the main shaft rotates, the driving mechanism drives the two movable plates to horizontally reciprocate in a direction close to or away from the filter screen plate. The moving directions of the two movable plates are opposite. When the movable plate approaches the filter screen plate, the cleaning rod on this movable plate inserts into the corresponding filter hole.

[0006] As a further improvement of this technical solution, a plurality of stirring blades are fixedly connected to the side wall of the main shaft. The feed pipe and the communication groove are respectively located on both sides of the stirring blades.

[0007] As a further improvement of this technical solution, two extension rods are fixedly connected to a side of the movable plate away from the cleaning rod. A positioning plate is slidably sleeved on the outer sides of the two extension rods. The positioning plate is fixedly arranged on the bottom surface inside the tank body.

[0008] As a further improvement of this technical solution, the driving mechanism includes a transmission rod rotatably arranged on the bottom surface inside the tank body. A lower gear is coaxially fixedly connected to the side wall of the transmission rod. Lower racks are arranged on both sides of the lower gear. The lower racks are meshed with the lower gear. One ends of the two lower racks are respectively fixed on one side of the two movable plates. And the side of the lower rack away from the lower gear is slidably arranged with the corresponding positioning plate.

[0009] As a further improvement of this technical solution, a turntable is eccentrically fixedly connected to the side wall of the main shaft. A sleeve frame is slidably sleeved on the outer side of the turntable. An outer frame body is fixedly connected to one side of the sleeve frame. An upper rack is fixedly connected to the inner wall of the outer frame body. An upper gear is fixedly connected to the side wall of the transmission rod. The upper gear is meshed with the upper rack. And the upper gear is arranged inside the outer frame body.

[0010] As a further improvement of the technical solution, a reinforcing plate and a guide shell are fixedly connected to the inner wall of the tank body. The upper end of the transmission rod is rotatably arranged on the reinforcing plate. The other end of the outer frame body is fixedly connected with a sliding sleeve, and the sliding sleeve is slidably arranged on the outside of the reinforcing plate. One side of the sleeve frame away from the outer frame body is fixedly connected with a sliding rod, and the other end of the sliding rod is slidably arranged inside the guide shell.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] In this wet powder material conveying device, when the feeding pump pumps lime slurry into the pipeline of the flue gas desulfurization device, the filter screen plate filters to prevent lime lumps from being sucked by the feeding pump. The filter screen plate blocks the lime lumps into the interior of the tank body. At the same time, by driving the stirring blades to rotate with the main shaft, the lime lumps in the tank body are stirred and mixed with the lime slurry, reducing the number of lime lumps in the tank body. The main shaft then drives the two cleaning rods to alternately dredge the filter holes of the filter screen plate, preventing the filter holes of the filter screen plate from being blocked by lime lumps, enabling the filter screen plate to continuously filter the lime slurry, thereby avoiding the blockage of the flue gas desulfurization device pipeline by lime lumps and ensuring the normal operation of the flue gas desulfurization device. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram of the utility model;

[0014] Figure 2 is one of the sectional views of the overall structure of the utility model;

[0015] Figure 3 is the second sectional view of the overall structure of the utility model;

[0016] Figure 4 is the partial structural schematic diagram of the driving mechanism of the utility model;

[0017] Figure 5 is the third sectional view of the overall structure of the utility model;

[0018] Figure 6 is of the utility model Figure 5 enlarged view of the structure at A.

[0019] The meanings of the various reference numerals in the figure are as follows:

[0020] 1. Tank body; 11. Feed pipe; 12. Transfer box; 13. Positioning plate; 14. Reinforcing plate; 15. Guide shell;

[0021] 2. Feeding pump; 3. Discharge pipe; 4. Motor;

[0022] 5. Main shaft; 51. Stirring blade;

[0023] 6. Filter screen plate;

[0024] 7. Movable plate; 71. Cleaning rod; 72. Extension rod;

[0025] 8. Driving mechanism; 81. Transmission rod; 82. Lower gear; 83. Lower rack; 84. Turntable; 85. Sleeve frame; 86. Outer frame body; 87. Upper rack; 88. Upper gear; 89. Slide rod. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0027] Please refer to Figure 1 - Figure 2 As shown, one of the purposes of this embodiment is to provide a wet powder conveying device, which includes a tank body 1. A feed pipe 11 is fixedly connected to a position near the top of one side of the tank body 1. A transfer box 12 is fixedly connected to a position near the bottom of the other side of the tank body 1. A communication groove is formed on the side wall of the tank body 1. A filter screen plate 6 is fixedly connected to the inner wall of the communication groove. A plurality of filter holes are formed on the filter screen plate 6. The filter holes connect the interiors of the tank body 1 and the transfer box 12. A feed pump 2 is fixedly connected to the side of the transfer box 12 away from the tank body 1. A suction pipe is fixedly connected to one side of the feed pump 2. One end of the suction pipe penetrates through the side wall of the transfer box 12 and extends into the interior of the transfer box 12. An outlet pipe 3 is fixedly connected to the top of the feed pump 2. The outlet pipe 3 is communicated with an external flue gas desulfurization device. After the lime slurry is conveyed into the interior of the tank body 1 through the feed pipe 11, a part of the lime slurry inside the tank body 1 enters the interior of the transfer box 12 through the filter holes. The feed pump 2 is started to pump the lime slurry inside the transfer box 12 into the flue gas desulfurization device through the outlet pipe 3. During this process, the lime slurry inside the tank body 1 continuously replenishes the interior of the transfer box 12 through the filter holes. The filter holes block the hardened lumps in the lime slurry from entering the interior of the transfer box 12, so that the hardened lumps are retained inside the tank body 1, avoiding the hardened lumps being pumped into the flue gas desulfurization device by the feed pump 2 and preventing the hardened lumps from blocking the pipelines in the flue gas desulfurization device, thereby ensuring the normal operation of the flue gas desulfurization device.

[0028] To reduce the number of hardened lumps in the lime slurry, a motor 4 is fixedly connected to the top of the tank body 1. The lower end of the output shaft of the motor 4 extends into the tank body 1 and is coaxially and fixedly connected to a main shaft 5. The lower end of the main shaft 5 is rotatably arranged on the bottom surface inside the tank body 1. A plurality of stirring blades 51 are fixedly connected to the side wall of the main shaft 5. The materials entering from the feed pipe 11 are stirred by the plurality of stirring blades 51 to make the materials evenly stirred. The stirred materials are discharged through the communication groove. The feed pipe 11 and the communication groove are respectively located on both sides of the stirring blades 51, so as to extend the time for the materials to flow from the feed pipe 11 to the communication groove, improve the effect of the stirring blades 51 in stirring the materials. At the same time, there are gaps between the plurality of stirring blades 51, and there is also a gap between the lowermost stirring blade 51 and the bottom surface inside the tank body 1. When the lime slurry enters the inside of the tank body 1 through the feed pipe 11, the lime slurry will first flow through the gap and then enter the inside of the transfer box 12 through the communication groove. After the motor 4 is started, its output shaft drives the main shaft 5 to rotate, and the main shaft 5 drives the plurality of stirring blades 51 to rotate. The rotating stirring blades 51 stir the lime slurry and lime lumps inside the tank body 1. By stirring and mixing the lime lumps blocked by the filter mesh plate 6 with the lime slurry, the lime lumps are quickly dissolved in the lime slurry to reduce the number of lime lumps in the lime slurry, thereby reducing the filtering pressure on the filter mesh plate 6 and preventing a large amount of lime lumps from adhering to the surface of the filter mesh plate 6 and blocking the filter holes, resulting in the failure of the filtering function of the filter mesh plate 6.

[0029] When most of the filter holes of the filter mesh plate 6 are blocked by lime lumps, the lime slurry inside the tank body 1 cannot be replenished into the inside of the transfer box 12 in time through the filter holes, resulting in a decrease in the efficiency of the feed pump 2 in delivering the lime slurry to the flue gas desulfurization device. To solve this problem, two movable plates 7 are arranged inside the tank body 1. A plurality of cleaning rods 71 are fixedly connected to the side of the movable plate 7 close to the filter mesh plate 6. The cleaning rods 71 are arranged corresponding to the plurality of filter holes. A driving mechanism 8 is arranged between the two movable plates 7 and the main shaft 5. When the main shaft 5 rotates, the driving mechanism 8 drives the two movable plates 7 to horizontally reciprocate in a direction close to or away from the filter mesh plate 6. The moving directions of the two movable plates 7 are opposite. When the movable plate 7 approaches the filter mesh plate 6, the cleaning rod 71 on this movable plate 7 is inserted into the corresponding filter hole. When one end of the cleaning rod 71 is inserted into the filter hole, the lime lumps inside the filter hole will be pushed out, so as to achieve the purpose of dredging the filter hole. The two groups of cleaning rods 71 are respectively responsible for dredging half of the filter holes. The two groups of cleaning rods 71 alternately dredge the filter holes. When one group of cleaning rods 71 dredges half of the filter holes, the lime slurry inside the tank body 1 enters the inside of the transfer box 12 through the other half of the filter holes. The rate at which the lime slurry enters the inside of the transfer box 12 through half of the filter holes can match the conveying rate of the feed pump 2, so that the feed pump 2 can continuously deliver a sufficient amount of lime slurry to the inside of the flue gas desulfurization device to ensure the normal operation of the flue gas desulfurization device.

[0030] In order to make the two sets of cleaning rods 71 alternately dredge a number of filter holes, the structure of the driving mechanism 8 is refined as follows. Refer to Figure 3 - Figure 6 , on the side of the movable plate 7 away from the cleaning rod 71, two extension rods 72 are fixedly connected. A positioning plate 13 is slidably sleeved on the outer sides of the two extension rods 72. The positioning plate 13 is fixedly arranged on the bottom surface inside the tank body 1. The extension rods 72 are horizontally arranged, so that the movable plate 7 can only move horizontally along the axis direction of the extension rods 72. The driving mechanism 8 includes a transmission rod 81 rotatably arranged on the bottom surface inside the tank body 1. A lower gear 82 is coaxially fixedly connected to the side wall of the transmission rod 81. Lower racks 83 are arranged on both sides of the lower gear 82. The lower racks 83 are engaged with the lower gear 82. One ends of the two lower racks 83 are respectively fixed on one side of the two movable plates 7. And the side of the lower rack 83 away from the lower gear 82 is slidably arranged with the corresponding positioning plate 13. When the transmission rod 81 drives the lower gear 82 to rotate, through the meshing transmission of the two lower racks 83 and the lower gear 82, the two lower racks 83 respectively drive the two movable plates 7 to move horizontally in opposite directions. When one of the movable plates 7 approaches the filter screen plate 6 and the cleaning rod 71 on this movable plate 7 dredges the corresponding filter hole, the other movable plate 7 moves away from the filter screen plate 6, and the cleaning rod 71 on this filter screen plate 6 is withdrawn from the inside of the corresponding filter hole. Then, by changing the rotation direction of the lower gear 82, the two movable plates 7 move in the reverse direction, so that the cleaning rod 71 on the other movable plate 7 dredges the corresponding filter hole. Therefore, by making the lower gear 82 rotate reciprocally, the two sets of cleaning rods 71 can alternately clean the corresponding filter holes, ensuring the efficiency of the filter screen plate 6 for filtering the lime slurry.

[0031] To drive the lower gear 82 to rotate reciprocally, a turntable 84 is eccentrically and fixedly connected to the side wall of the main shaft 5. A sleeve frame 85 is slidably sleeved outside the turntable 84. One side of the sleeve frame 85 is fixedly connected to an outer frame body 86. An upper rack 87 is fixedly connected to the inner wall of the outer frame body 86. An upper gear 88 is fixedly connected to the side wall of the transmission rod 81. The upper gear 88 meshes with the upper rack 87, and the upper gear 88 is arranged inside the outer frame body 86. Strengthening plates 14 and guide shells 15 are fixedly connected to the inner wall of the tank body 1. The upper end of the transmission rod 81 is rotatably arranged on the strengthening plate 14. The other end of the outer frame body 86 is fixedly connected with a sliding sleeve, and the sliding sleeve is slidably arranged outside the strengthening plate 14. One side of the sleeve frame 85 away from the outer frame body 86 is fixedly connected with a sliding rod 89. The other end of the sliding rod 89 is slidably arranged inside the guide shell 15. Both the strengthening plate 14 and the sliding rod 89 are horizontally arranged, so that the sleeve frame 85 and the outer frame body 86 can only move horizontally along the axial direction of the sliding rod 89. When the main shaft 5 drives the turntable 84 to rotate, the rotating turntable 84 pushes the sleeve frame 85 to move horizontally back and forth. The sleeve frame 85 drives the outer frame body 86 and the upper rack 87 to move horizontally back and forth synchronously. Through the meshing transmission between the upper rack 87 and the upper gear 88, the upper gear 88 drives the transmission rod 81 to rotate reciprocally, and the transmission rod 81 drives the lower gear 82 to rotate reciprocally, so that the two cleaning rods 71 can alternately clean the corresponding filter holes.

[0032] When the device is in use, the lime slurry mixed with hardened lumps is injected into the interior of the tank body 1 through the feed pipe 11, so that the lime slurry flows into the interior of the transfer box 12 after being filtered by the filter mesh plate 6. The feed pump 2 is started to pump the lime slurry in the transfer box 12 into the flue gas desulfurization device through the discharge pipe 3, so that the lime slurry after filtering out the hardened lumps participates in the flue gas treatment. Then the motor 4 is started to drive its output shaft to drive the main shaft 5 and several stirring blades 51 to rotate. The stirring blades 51 stir the hardened lumps blocked inside the tank body 1 by the filter mesh plate 6, so that the hardened lumps are mixed with the lime slurry inside the tank body 1, and the hardened lumps are dissolved in the lime slurry, thereby reducing the number of hardened lumps in the lime slurry. At the same time, the main shaft 5 drives the two movable plates 7 to move horizontally back and forth in the direction close to or away from the filter mesh plate 6 through the driving mechanism 8, so that the two cleaning rods 71 alternately dredge several filter holes, preventing the filter holes of the filter mesh plate 6 from being blocked by the smaller hardened lumps, thereby ensuring the efficiency of the filter mesh plate 6 in filtering the lime slurry.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A wet powder conveying device, comprising a tank body (1), wherein a feed pipe (11) is fixedly connected to a position near the top of one side of the tank body (1), and it is characterized in that: On the other side of the tank body (1) near the bottom end, a transfer box (12) is fixedly connected. A communication groove is formed on the side wall of the tank body (1). A filter screen plate (6) is fixedly connected to the inner wall of the communication groove. A plurality of filter holes are formed on the filter screen plate (6). The filter holes communicate the inside of the tank body (1) and the transfer box (12). On the side of the transfer box (12) away from the tank body (1), a feeding pump (2) is fixedly connected. On one side of the feeding pump (2), a suction pipe is fixedly connected. One end of the suction pipe penetrates the side wall of the transfer box (12) and extends into the inside of the transfer box (12). On the top of the feeding pump (2), a discharge pipe (3) is fixedly connected. On the top of the tank body (1), a motor (4) is fixedly connected. The lower end of the output shaft of the motor (4) extends into the inside of the tank body (1) and is coaxially fixedly connected with a main shaft (5). The lower end of the main shaft (5) is rotatably arranged on the bottom surface inside the tank body (1). Two movable plates (7) are arranged inside the tank body (1). On the side of the movable plate (7) close to the filter screen plate (6), a plurality of cleaning rods (71) are fixedly connected. The cleaning rods (71) are arranged corresponding to the plurality of filter holes. A driving mechanism (8) is arranged between the two movable plates (7) and the main shaft (5). When the main shaft (5) rotates, the driving mechanism (8) drives the two movable plates (7) to horizontally reciprocate in the direction close to or away from the filter screen plate (6). The moving directions of the two movable plates (7) are opposite. When the movable plate (7) approaches the filter screen plate (6), the cleaning rod (71) on this movable plate (7) is inserted into the corresponding filter hole.

2. The wet powder conveying device according to claim 1, wherein: A plurality of stirring blades (51) are fixedly connected to the side wall of the main shaft (5). The feeding pipe (11) and the communication groove are respectively located on both sides of the stirring blades (51).

3. The wet powder conveying device according to claim 1, wherein: On the side of the movable plate (7) away from the cleaning rod (71), two extension rods (72) are fixedly connected. A positioning plate (13) is slidably sleeved on the outer sides of the two extension rods (72). The positioning plate (13) is fixedly arranged on the bottom surface inside the tank body (1).

4. The wet powder conveying device according to claim 3, characterized in that: The driving mechanism (8) includes a transmission rod (81) rotatably arranged on the bottom surface inside the tank body (1). A lower gear (82) is coaxially fixedly connected to the side wall of the transmission rod (81). Lower racks (83) are arranged on both sides of the lower gear (82). The lower racks (83) are meshed with the lower gear (82). One ends of the two lower racks (83) are respectively fixed on one side of the two movable plates (7). And the side of the lower rack (83) away from the lower gear (82) is slidably arranged with the corresponding positioning plate (13).

5. The wet powder conveying device according to claim 4, characterized in that: An eccentric disc (84) is fixedly connected to the side wall of the main shaft (5). A sleeve frame (85) is slidably sleeved on the outer side of the eccentric disc (84). One side of the sleeve frame (85) is fixedly connected with an outer frame body (86). An upper rack (87) is fixedly connected to the inner wall of the outer frame body (86). An upper gear (88) is fixedly connected to the side wall of the transmission rod (81). The upper gear (88) is meshed with the upper rack (87). And the upper gear (88) is arranged inside the outer frame body (86).

6. The wet powder conveying device according to claim 5, wherein: The inner wall of the tank body (1) is fixedly connected with a reinforcing plate (14) and a guide shell (15). The upper end of the transmission rod (81) is rotatably arranged on the reinforcing plate (14). The other end of the outer frame body (86) is fixedly connected with a sliding sleeve, and the sliding sleeve is slidably arranged on the outside of the reinforcing plate (14). One side of the sleeve frame (85) far away from the outer frame body (86) is fixedly connected with a sliding rod (89), and the other end of the sliding rod (89) is slidably arranged inside the guide shell (15).

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