Low-temperature countercurrent flue gas concentration tower

Abstract

The utility model discloses a low-temperature countercurrent flue gas concentration tower which comprises a tower body, a partition plate fixedly connected to the inner wall of the tower body, a fan fixedly connected to the left side face of the tower body, a flue gas inlet pipe connected to an air inlet of the fan, a flue gas outlet pipe connected to an air outlet of the fan, and guide plates arranged on the inner wall of the tower body and the partition plate in a staggered mode. A bearing plate is fixedly connected to the rear surface of the tower body, a first pump body and a second pump body are fixedly connected to the upper surface of the bearing plate, a liquid pumping opening of the first pump body communicates with the tower body through a first liquid pumping pipe, and a water outlet of the first pump body is connected with a first spraying mechanism through a first liquid outlet pipe; a liquid pumping opening of the second pump body is communicated with the tower body through a second liquid pumping pipe, a water outlet of the second pump body is connected with a second spraying mechanism through a second liquid outlet pipe, an opening is formed in the partition plate, and a smoke exhaust pipe is arranged on the right side face of the tower body.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization wastewater treatment, in particular to a low-temperature countercurrent flue gas concentration tower. Background Art

[0002] Limestone-gypsum wet flue gas desulfurization technology is the most widely used and most mature flue gas desulfurization technology in China. However, in order to maintain the chloride ion balance of the slurry and ensure the desulfurization efficiency during operation, the wet desulfurization technology needs to discharge a part of the slurry regularly. This part of the slurry is the desulfurization wastewater, and this type of wastewater usually has the characteristics of high suspended matter content, high salt content, high hardness, and heavy metals, and is generally not allowed to be discharged.

[0003] Due to the water quality properties of desulfurization wastewater, the related project investment and operating costs have always been high. In recent years, in order to reduce the operating cost of the zero-discharge system of desulfurization wastewater, the zero-discharge technology of using flue gas waste heat to concentrate and reduce desulfurization wastewater has received increasing attention. At present, the existing technology usually uses a countercurrent contact concentration tower for heat and mass transfer between flue gas and wastewater, but there are problems such as insufficient contact between flue gas and wastewater and poor concentration effect.

[0004] Therefore, it is necessary to design a low-temperature countercurrent flue gas concentration tower with strong practicality. Utility Model Content

[0005] The utility model aims to provide a low-temperature countercurrent flue gas concentration tower to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a low-temperature countercurrent flue gas concentration tower comprises a tower body, a partition is fixedly connected to the inner wall of the tower body, a fan is fixedly connected to the left side of the tower body, an air inlet of the fan is connected to a smoke inlet pipe, an air outlet of the fan is connected to a smoke outlet pipe, one end of the smoke outlet pipe extends into the tower body, guide plates are alternately arranged on the inner wall and the partition of the tower body, a supporting plate is fixedly connected to the rear surface of the tower body, a first pump body and a second pump body are fixedly connected at the left and right positions on the upper surface of the supporting plate, a liquid extraction port on the lower surface of the first pump body is connected to the tower body through a first liquid extraction pipe, a water outlet on the upper surface of the first pump body is connected to a first spray mechanism through a first liquid outlet pipe, a liquid extraction port on the lower surface of the second pump body is connected to the tower body through a second liquid extraction pipe, a water outlet on the upper surface of the second pump body is connected to a second spray mechanism through a second liquid outlet pipe, an opening is provided on the partition, and a smoke exhaust pipe is provided on the right side of the tower body.

[0007] According to the above technical solution, the first spray mechanism includes an infusion tube, which is connected to the first liquid outlet tube, and the infusion tube is fixedly connected to the upper surface of the tower body. The lower surface of the infusion tube is connected to a plurality of liquid guide tubes, one end of the liquid guide tube extends into the wall of the tower body and is connected to a spray pipe, and a plurality of spray heads are provided on the lower surface of the spray pipe, and one end of the spray head extends into the tower body.

[0008] According to the above technical solution, the second spray mechanism includes a connecting pipe, which is rotatably arranged on the upper surface of the tower body through a first sealed bearing, and one end of the connecting pipe extending into the tower body is connected to a spray plate, and a plurality of nozzles are provided on the lower surface of the spray plate. One end of the second liquid outlet pipe extends into the connecting pipe and is rotatably connected to the connecting pipe through a second sealed bearing. A first motor is fixedly connected to the right side of the upper surface of the tower body, and a rotating shaft is fixedly connected to the output end of the first motor, and a first gear is fixedly connected to one end of the rotating shaft, and a second gear meshing with the first gear is fixedly sleeved on the connecting pipe.

[0009] According to the above technical solution, a liquid inlet pipe is provided on the left side of the tower body, and a liquid discharge pipe is provided on the left side of the tower body and below the liquid inlet pipe. Control valves are provided on the liquid inlet pipe, the liquid discharge pipe, the smoke inlet pipe and the smoke exhaust pipe.

[0010] According to the above technical solution, a second motor is fixedly connected to the lower surface of the tower body, a rotating rod is fixedly connected to the output end of the second motor, one end of the rotating rod extends into the tower body through a third sealed bearing and is fixedly connected to a plurality of stirring rods.

[0011] According to the above technical solution, water channels are provided on the two lower guide plates.

[0012] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: in the utility model, the smoke can be introduced into the tower body through the smoke inlet pipe and the smoke outlet pipe by the fan, and the smoke can be fully contacted with the wastewater through the cooperation among the guide plate, the first pump body, the first liquid extraction pipe, the first liquid outlet pipe and the first spray mechanism, so that the smoke can be in contact with the wastewater again, and the concentration effect is better. Through the arrangement of the second pump body, the second liquid extraction pipe, the second liquid outlet pipe and the second spray mechanism, the smoke can be contacted with the wastewater again, so as to further improve the concentration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2It is a schematic diagram of the main cross-sectional structure of the utility model;

[0016] Figure 3 yes Figure 2 The enlarged structural diagram of the middle A part;

[0017] Figure 4 It is a partial structural schematic diagram of the utility model;

[0018] In the figure: 1-tower body, 2-partition, 3-fan, 4-smoke inlet pipe, 5-smoke outlet pipe, 6-guide plate, 7-support plate, 8-first pump body, 9-second pump body, 10-first liquid extraction pipe, 11-first liquid outlet pipe, 12-second liquid extraction pipe, 13-second liquid outlet pipe, 14-opening, 15-smoke exhaust pipe, 16-infusion pipe, 17-liquid guide pipe, 18-spray pipe, 19-spray head, 20-connecting pipe, 21-first sealed bearing, 22-spray plate, 23-spray head, 24-second sealed bearing, 25-first motor, 26-rotating shaft, 27-first gear, 28-second gear, 29-liquid inlet pipe, 30-liquid outlet pipe, 31-second motor, 32-rotating rod, 33-third sealed bearing, 34-stirring rod, 35-water trough. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4The utility model provides a technical solution: a low-temperature countercurrent flue gas concentration tower, comprising a tower body 1, a partition 2 is fixedly connected to the inner wall of the tower body 1, a fan 3 is fixedly connected to the left side of the tower body 1, the air inlet of the fan 3 is connected to the smoke inlet pipe 4, the air outlet of the fan 3 is connected to the smoke outlet pipe 5, one end of the smoke outlet pipe 5 extends into the tower body 1, and the smoke can be passed into the tower body 1 through the smoke inlet pipe 4 and the smoke outlet pipe 5 through the fan 3, guide plates 6 are alternately arranged on the inner wall and the partition 2 of the tower body 1, a supporting plate 7 is fixedly connected to the rear surface of the tower body 1, and a first pump body 8 and a second pump body 9 are fixedly connected at the left and right positions of the upper surface of the supporting plate 7, respectively, the liquid extraction port on the lower surface of the first pump body 8 is connected to the tower body 1 through the first liquid extraction pipe 10, and the water outlet on the upper surface of the first pump body 8 is connected to the tower body 1 through the first The liquid outlet pipe 11 is connected to a first spray mechanism. Through the cooperation among the guide plate 6, the first pump body 8, the first liquid extraction pipe 10, the first liquid outlet pipe 11 and the first spray mechanism, the flue gas and the wastewater can be fully contacted, and the concentration effect is better. The liquid extraction port on the lower surface of the second pump body 9 is connected to the tower body 1 through the second liquid extraction pipe 12. The water outlet on the upper surface of the second pump body 9 is connected to the second spray mechanism through the second liquid outlet pipe 13. Through the arrangement of the second pump body 9, the second liquid extraction pipe 12, the second liquid outlet pipe 13 and the second spray mechanism, the flue gas and the wastewater can be contacted again, and the concentration effect is further improved. The partition plate 2 is provided with an opening 14. The arrangement of the opening 14 facilitates the passage of the sprayed wastewater. The right side of the tower body 1 is provided with a smoke exhaust pipe 15. Through the arrangement of the smoke exhaust pipe 15, the flue gas can be introduced into the desulfurization tower;

[0021] The first spray mechanism includes a liquid infusion pipe 16, the liquid infusion pipe 16 is connected to the first liquid outlet pipe 11, the liquid infusion pipe 16 is fixedly connected to the upper surface of the tower body 1, the lower surface of the liquid infusion pipe 16 is connected to a plurality of liquid guide pipes 17, one end of the liquid guide pipe 17 extends into the wall of the tower body 1 and is connected to a spray pipe 18, a plurality of spray heads 19 are provided on the lower surface of the spray pipe 18, one end of the spray head 19 extends into the tower body 1, and through the arrangement of the first spray mechanism, wastewater is sprayed into the tower body 1 through the liquid infusion pipe 16, the liquid guide pipe 17, the spray pipe 18 and the spray head 19;

[0022] The second spray mechanism includes a connecting pipe 20, which is rotatably arranged on the upper surface of the tower body 1 through a first sealed bearing 21. One end of the connecting pipe 20 extending into the tower body 1 is connected to a spray plate 22, and a plurality of nozzles 23 are arranged on the lower surface of the spray plate 22. One end of the second liquid outlet pipe 13 extends into the connecting pipe 20 and is rotatably connected to the connecting pipe 20 through a second sealed bearing 24. A first motor 25 is fixedly connected to the right side of the upper surface of the tower body 1, and a rotating shaft 26 is fixedly connected to the output end of the first motor 25. One end of the rotating shaft 26 is fixedly connected to the output end of the first motor 25. The connecting tube 20 is fixedly connected with a first gear 27, and a second gear 28 meshing with the first gear 27 is fixedly sleeved on the connecting tube 20. By setting the second spray mechanism, the first motor 25 can be started, and the output end of the first motor 25 drives the first gear 27 to rotate through the rotating shaft 26. The first gear 27 is meshed with the second gear 28 on the connecting tube 20, so that the connecting tube 20 rotates under the setting of the first sealing bearing 21 and the second sealing bearing 24. The rotation of the connecting tube 20 can drive the spray disc 22 to move in the same direction, thereby making the spraying effect better;

[0023] A liquid inlet pipe 29 is provided on the left side of the tower body 1, and a liquid discharge pipe 30 is provided on the left side of the tower body 1 and below the liquid inlet pipe 29. The liquid inlet pipe 29, the liquid discharge pipe 30, the smoke inlet pipe 4 and the smoke exhaust pipe 15 are all provided with control valves. Through the setting of the control valves, the on-off of the liquid inlet pipe 29, the liquid discharge pipe 30, the smoke inlet pipe 4 and the smoke exhaust pipe 15 can be controlled;

[0024] The lower surface of the tower body 1 is fixedly connected to a second motor 31, and the output end of the second motor 31 is fixedly connected to a rotating rod 32. One end of the rotating rod 32 extends into the tower body 1 through a third sealed bearing 33 and is fixedly connected to a plurality of stirring rods 34. Through the arrangement of the second motor 31, the rotating rod 32, the third sealed bearing 33 and the stirring rods 34, the wastewater can be stirred;

[0025] The two guide plates 6 at the lower part are both provided with water channels 35 , and the provision of the water channels 35 facilitates the passage of the sprayed waste water.

[0026] Working principle: When the utility model is in use, the low-temperature flue gas from the main flue passes through the fan 3 and the smoke inlet pipe 4 and the smoke outlet pipe 5 to enter the tower body 1, and the flue gas is diverted by the guide plate 6. By starting the first pump body 8, the first pump body 8 extracts the waste water in the tower body 1 through the first liquid extraction pipe 10, and then passes it into the first spray mechanism through the first liquid outlet pipe 11, and sprays it into the tower body 1 through the liquid infusion pipe 16, the liquid guide pipe 17, the spray pipe 18 and the spray head 19, so that the flue gas and the waste water can be fully contacted, and the concentration effect is better. By starting the second pump body 9, the second pump body 9 extracts the waste water in the tower body 1 through the second liquid extraction pipe 12, and then passes it into the second spray mechanism through the second liquid outlet pipe 13. By starting the second pump body 9, the second pump body 9 extracts the waste water in the tower body 1 through the second liquid extraction pipe 12, and then passes it into the second spray mechanism through the second liquid outlet pipe 13. The first motor 25 in the second spray mechanism, the output end of the first motor 25 drives the first gear 27 to rotate through the rotating shaft 26, and the first gear 27 is meshed and connected with the second gear 28 on the connecting pipe 20, so that the connecting pipe 20 is rotated under the setting of the first sealing bearing 21 and the second sealing bearing 24. The rotation of the connecting pipe 20 can drive the spray plate 22 to move in the same direction, so as to achieve a better spraying effect, and the flue gas can be brought into contact with the wastewater again, further improving the concentration effect. The sprayed wastewater flows back through the water trough 35 and the opening 14 for reuse, and then the flue gas with moisture enters the desulfurization tower through the exhaust pipe 15. After running for a period of time, the concentrated wastewater is discharged through the drain pipe 30.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-temperature countercurrent flue gas concentration tower, comprising a tower body (1), characterized in that: A partition plate (2) is fixedly connected to the inner wall of the tower body (1), a fan (3) is fixedly connected to the left side of the tower body (1), an air inlet of the fan (3) is connected to a smoke inlet pipe (4), an air outlet of the fan (3) is connected to a smoke outlet pipe (5), one end of the smoke outlet pipe (5) extends into the tower body (1), guide plates (6) are alternately arranged on the inner wall of the tower body (1) and the partition plate (2), a support plate (7) is fixedly connected to the rear surface of the tower body (1), and a first pump body (8) and a second pump body (9) are fixedly connected to the left and right positions of the upper surface of the support plate (7), respectively. A pump body (9), wherein the liquid extraction port on the lower surface of the first pump body (8) is connected to the tower body (1) via a first liquid extraction pipe (10), the water outlet on the upper surface of the first pump body (8) is connected to a first spray mechanism via a first liquid outlet pipe (11), the liquid extraction port on the lower surface of the second pump body (9) is connected to the tower body (1) via a second liquid extraction pipe (12), the water outlet on the upper surface of the second pump body (9) is connected to a second spray mechanism via a second liquid outlet pipe (13), the partition plate (2) is provided with an opening (14), and the right side surface of the tower body (1) is provided with a smoke exhaust pipe (15).

2. A low-temperature countercurrent flue gas concentration tower according to claim 1, characterized in that: The first spray mechanism comprises a liquid infusion pipe (16), the liquid infusion pipe (16) is connected to the first liquid outlet pipe (11), the liquid infusion pipe (16) is fixedly connected to the upper surface of the tower body (1), the lower surface of the liquid infusion pipe (16) is connected to a plurality of liquid guide pipes (17), one end of the liquid guide pipe (17) extends into the wall of the tower body (1) and is connected to a spray pipe (18), the lower surface of the spray pipe (18) is provided with a plurality of spray heads (19), one end of each spray head (19) extends into the tower body (1).

3. A low-temperature countercurrent flue gas concentration tower according to claim 1, characterized in that: The second spray mechanism comprises a connecting pipe (20), the connecting pipe (20) being rotatably arranged on the upper surface of the tower body (1) via a first sealing bearing (21), one end of the connecting pipe (20) extending into the tower body (1) being connected to a spray plate (22), a plurality of spray heads (23) being provided on the lower surface of the spray plate (22), one end of the second liquid outlet pipe (13) extending into the connecting pipe (20) and being rotatably connected to the connecting pipe (20) via a second sealing bearing (24), a first motor (25) being fixedly connected to the right side of the upper surface of the tower body (1), an output end of the first motor (25) being fixedly connected to a rotating shaft (26), one end of the rotating shaft (26) being fixedly connected to a first gear (27), and a second gear (28) meshingly connected to the first gear (27) being fixedly sleeved on the connecting pipe (20).

4. A low-temperature countercurrent flue gas concentration tower according to claim 1, characterized in that: A liquid inlet pipe (29) is provided on the left side of the tower body (1), a liquid discharge pipe (30) is provided on the left side of the tower body (1) and below the liquid inlet pipe (29), and control valves are provided on the liquid inlet pipe (29), the liquid discharge pipe (30), the smoke inlet pipe (4) and the smoke exhaust pipe (15).

5. The low-temperature countercurrent flue gas concentration tower according to claim 1, characterized in that: A second motor (31) is fixedly connected to the lower surface of the tower body (1); an output end of the second motor (31) is fixedly connected to a rotating rod (32); one end of the rotating rod (32) extends into the tower body (1) through a third sealed bearing (33) and is fixedly connected to a plurality of stirring rods (34).

6. The low-temperature countercurrent flue gas concentration tower according to claim 1, characterized in that: The two lower guide plates (6) are both provided with water channels (35).

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