Moving bed trickling filtration alkaline washing pool

Abstract

The utility model relates to a moving bed trickling filtration alkaline washing pool, which comprises a tower body, a filter tank, a filter tank, a filter tank, a filter tank, a filter tank, a filter tank, a filter tank and an alkali washing tank, and is characterized in that the tower body is internally provided with a packed bed; the gas outlet pipeline is communicated with the second cavity, and the gas outlet pipeline is used for discharging gas in the second cavity; an inlet of the filler return pipeline is communicated with the bottom of the filler bed, an outlet of the filler return pipeline extends into the first cavity, and a first pump body is arranged on the filler return pipeline; an inlet of the spraying pipeline is communicated with the second cavity, an outlet of the spraying pipeline extends into the first cavity, the spraying pipeline can be used for introducing the washing liquid in the second cavity into the first cavity for spraying, and a second pump body is arranged on the spraying pipeline; the sludge discharge pipeline is communicated with the second cavity, and sludge in the second cavity can be discharged from the sludge discharge pipeline. Therefore, the moving bed trickling filtration alkaline washing pool can reduce the scaling phenomenon of the filler.

Description

Technical Field

[0001] This utility model relates to the field of waste gas purification technology, specifically to a moving bed drip filtration alkaline washing tank. Background Technology

[0002] Fixed-bed alkaline scrubbing units such as trickling filters, scrubbing towers, and stripping towers are commonly used to remove acidic gases from gas streams. However, in actual operation, as the inorganic salt content in the scrubbing liquid gradually increases, if not discharged in a timely manner, scaling will occur in the packing material under continuous operation, leading to a surge in gas flow resistance and a significant increase in system pressure drop. When the situation deteriorates to a certain extent, the reactor may even become completely blocked, at which point operation must be interrupted for tower maintenance. Frequent start-up and shutdown maintenance operations not only significantly increase maintenance costs but also cause a series of problems such as unplanned shutdowns of the treatment system. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a moving bed trickling filtration alkaline washing tank.

[0004] The moving bed drip filtration alkaline washing tank of this utility model embodiment includes:

[0005] The tower body includes a packed bed and a first cavity and a second cavity communicating with the packed bed. The first cavity, the packed bed, and the second cavity are arranged sequentially from top to bottom. The packed bed contains packing material.

[0006] An air intake pipe is connected to the inlet of the first cavity, and the air intake pipe is used to introduce the gas to be processed into the first cavity.

[0007] An exhaust pipe is provided, which is connected to the second cavity and is used to discharge gas from the second cavity.

[0008] A packing return pipeline is provided, the inlet of which is connected to the bottom of the packing bed, the outlet of which extends into the first cavity, and a first pump body is provided on the packing return pipeline. The packing return pipeline and the first pump body cooperate to allow the packing at the bottom of the packing bed to be introduced into the first cavity.

[0009] The spray pipe has an inlet connected to the second cavity and an outlet extending into the first cavity. The spray pipe can pass the washing liquid in the second cavity into the first cavity for spraying. The spray pipe is equipped with a second pump.

[0010] A sludge discharge pipe is connected to the second cavity, through which sludge in the second cavity can be discharged.

[0011] Therefore, the moving bed drip filtration alkaline washing tank according to the embodiments of this utility model can reduce the scaling phenomenon of the packing material.

[0012] In some embodiments, the first cavity is provided with a disperser, at least a portion of the top surface of the disperser being a cone with a downwardly increasing diameter, and the outlet of the packing return line is located directly above the disperser.

[0013] In some embodiments, the first cavity is provided with a reflux liquid storage tank, and the washing liquid discharged from the packing reflux pipeline can be introduced into the reflux liquid storage tank. The outlet of the reflux liquid storage tank is connected to the bottom of the packing bed through the packing reflux flushing pipeline.

[0014] In some embodiments, the spray pipe is provided with a bottom flushing pipe for the packing bed, the outlet of which extends into the bottom of the packing bed.

[0015] In some embodiments, the tower body is provided with a level gauge, which is used to monitor the level of the washing liquid in the second cavity;

[0016] The spray pipe is provided with a spray liquid discharge pipe connected to it. The spray liquid discharge pipe is provided with a spray liquid drain valve. The spray liquid drain valve is electrically connected to the liquid level gauge. When the liquid level of the washing liquid in the second cavity is greater than or equal to a first preset value, the spray liquid drain valve is opened so that the spray liquid discharge pipe can be used to discharge the washing liquid.

[0017] In some embodiments, the tower body is provided with a washing liquid discharge pipe communicating with the second cavity, and the washing liquid in the second cavity can be discharged from the washing liquid discharge pipe.

[0018] In some embodiments, the inlet of the packing return pipeline extends upward from the second cavity into the packing bed, so that the packing material in the packing bed can enter the inlet of the packing return pipeline;

[0019] The spray pipe is provided with a packing return flushing pipe connected to it. The outlet of the packing return flushing pipe extends into the second cavity and is connected to the packing return pipe. The packing return flushing pipe is used to flush the packing return pipe.

[0020] In some embodiments, the tower body is provided with a water supply pipeline communicating with the second cavity, and a third pump body is provided on the water supply pipeline;

[0021] And / or, the spray pipe is provided with a washing liquid replenishment pipe connected thereto.

[0022] In some embodiments, the spray pipeline includes a first pipe section and a second pipe section, and the second cavity, the first pipe section, the second pump body, the second pipe section and the first cavity are connected in sequence;

[0023] The spray pipe is equipped with a pH measuring pipe, the inlet of which is connected to the second pipe section and the outlet of which is connected to the first pipe section. A pH meter is installed on the pH measuring pipe.

[0024] The tower body is provided with an alkali dosing pipeline that communicates with the second cavity. The alkali dosing pipeline is used to introduce pH adjustment liquid into the second cavity. The alkali dosing pipeline is provided with a fourth pump body, which is electrically connected to the pH meter.

[0025] In some embodiments, the intake pipe is connected to the exhaust pipe via a bypass pipe. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a moving bed drip filtration alkaline washing tank according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of a moving bed drip filtration alkaline washing tank according to another embodiment of the present invention.

[0028] Figure label:

[0029] 1. Tower body; 11. First chamber; 12. Packing bed; 13. Second chamber; 14. Disperser; 15. Reflux liquid storage tank; 16. Packing reflux flushing pipeline; 17. Washing liquid discharge pipeline; 18. Level gauge; 19. Water replenishment pipeline; 191. Third pump body;

[0030] 2. Intake pipe; 21. Bypass pipe;

[0031] 3. Air outlet pipe;

[0032] 4. Packing return pipeline; 41. First pump body;

[0033] 5. Spraying pipeline, 501. First pipeline section, 502. Second pipeline section, 51. Bottom flushing pipeline of packing bed, 52. Spray liquid discharge pipeline, 521. Spray liquid discharge valve, 53. Packing return flushing pipeline, 54. Washing liquid replenishment pipeline, 55. Second pump body, 56. pH measurement pipeline, 57. pH meter;

[0034] 6. Sludge discharge pipeline;

[0035] 7. Alkali dosing pipeline; 71. Fourth pump body. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] The moving bed drip filtration alkaline washing tank of this utility model is described below with reference to the accompanying drawings. For example... Figure 1 and Figure 2 As shown, the moving bed drip filtration alkaline washing tank according to an embodiment of the present invention includes a tower body 1, an air inlet pipe 2, an air outlet pipe 3, a packing return pipe 4, a spray pipe 5, and a sludge discharge pipe 6.

[0038] The tower body 1 contains a packed bed 12 and a first cavity 11 and a second cavity 13 connected to the packed bed 12. The first cavity 11, the packed bed 12, and the second cavity 13 are arranged sequentially from top to bottom. The packed bed 12 contains packing material. An inlet pipe 2 is connected to the inlet of the first cavity 11 and is used to introduce the gas to be treated into the first cavity 11. An outlet pipe 3 is connected to the second cavity 13 and is used to discharge the gas from the second cavity 13. Specifically, the packing frame at the bottom of the packed bed 12 is connected to the inner wall of the tower body 1. The packing frame supports the packing material and has a through hole communicating with the second cavity. The outlet of the inlet pipe 2 is connected to the top of the tower body 1 (first cavity 11), and the inlet of the outlet pipe 3 is connected to the upper part of the second cavity.

[0039] In some embodiments, the intake pipe 2 is connected to the exhaust pipe 3 via a bypass pipe 21. This allows gas in the intake pipe 2 to enter the exhaust pipe 3 through the bypass pipe 21.

[0040] The inlet of the spray pipe 5 is connected to the second chamber 13, and the outlet of the spray pipe 5 extends into the first chamber 11. The spray pipe 5 can pass the washing liquid in the second chamber 13 into the first chamber 11 for spraying. A second pump body 55 is provided on the spray pipe 5. The sludge discharge pipe 6 is connected to the second chamber 13, and the sludge in the second chamber 13 can be discharged from the sludge discharge pipe 6. For example, the sludge discharge pipe 6 is connected to the center of the bottom of the second chamber 13.

[0041] According to an embodiment of the present invention, the gas to be treated is introduced into the first chamber 11 via the inlet pipe 2 of the moving bed drip filtration alkaline washing tank, and the spray pipe 5 can spray the gas to be treated and the packing material. After the gas to be treated passes through the first chamber 11 and the packing bed 12 in sequence, it is introduced into the second chamber 13 from the bottom of the packing bed 12, and the treated gas is discharged from the outlet pipe 3.

[0042] The inlet of the packing return pipe 4 is connected to the bottom of the packing bed 12, and the outlet of the packing return pipe 4 extends into the first cavity 11. The packing return pipe 4 is equipped with a first pump body 41. The packing return pipe 4 and the first pump body 41 cooperate to allow the packing at the bottom of the packing bed 12 to be introduced into the first cavity 11.

[0043] Specifically, a valve is installed at the inlet of the packing return pipeline 4. When cleaning of the packing is required, the valve and the first pump body 41 are opened, allowing the packing at the bottom of the packing bed 12 to enter the packing return pipeline 4, then flow upward into the first chamber 11, and move to the top of the packing bed 12. The packing flowing from the bottom of the packing bed 12 into the first chamber 11 can be sprayed with washing liquid from the spray pipeline 5, and moves from the bottom of the packing bed 12 to the top of the packing bed 12. The gas to be treated enters from the top of the tower body 1 (first chamber 11), mixes with the spray washing liquid and the packing return liquid, flows downward, and leaves the packing bed 12 after treatment. During this process, the bottom packing is extracted and flushed through the packing return pipeline 4 and the first pump body 41, which can effectively promote the removal of scale from the surface of the packing. The packing in the packing bed is in a continuous moving state. This dynamic disturbance mechanism can effectively inhibit the occurrence of scaling in the packing layer, so as to reduce the scaling phenomenon.

[0044] Therefore, the moving bed drip filtration alkaline washing tank according to the embodiments of this utility model can reduce the scaling phenomenon of the packing material.

[0045] like Figure 2 As shown, in some embodiments, a disperser 14 is provided inside the first cavity 11. At least a portion of the top surface of the disperser 14 is a conical surface with a downwardly increasing diameter. The outlet of the packing return pipe 4 is located directly above the disperser 14. Specifically, the disperser 14 is located above the spray pipe 5. The packing discharged from the outlet of the packing return pipe 4 is dispersed by the disperser 14 so that the packing entering the first cavity 11 can be evenly distributed to multiple positions on the top of the packing bed 12, thereby improving the descaling effect on the packing surface.

[0046] like Figure 1As shown, in some embodiments, a reflux liquid storage tank 15 is provided in the first cavity 11. The washing liquid discharged from the packing return pipe 4 can be introduced into the reflux liquid storage tank 15. The outlet of the reflux liquid storage tank 15 is connected to the bottom of the packing bed 12 through the packing return flushing pipe 16. Specifically, the reflux liquid storage tank 15 is located above the spray pipe 5 and directly below the outlet of the packing return pipe 4. The washing liquid discharged from the outlet of the packing return pipe 4 can be introduced into the reflux liquid storage tank 15 and then introduced into the bottom of the packing bed 12 through the packing return flushing pipe 16 to flush the bottom of the packing bed 12, thereby further improving the scale removal effect of the packing at the bottom of the packing bed 12. The packing can be diverted by the top surface of the reflux liquid storage tank 15 so that it falls at multiple positions on the top of the packing bed 12. For example, the top of the reflux liquid storage tank 15 is provided with an inlet hole, the diameter of which is smaller than the diameter of the packing.

[0047] like Figure 2 As shown, in some embodiments, the spray pipe 5 is provided with a bottom flushing pipe 51 connected to it, and the outlet of the bottom flushing pipe 51 extends into the bottom of the packing bed 12. This allows the washing liquid in the spray pipe 5 to be introduced into the bottom of the packing bed 12 through the bottom flushing pipe 51 to flush the bottom of the packing bed 12, thereby further improving the descaling effect on the packing material at the bottom of the packing bed 12.

[0048] like Figure 2 As shown, in some embodiments, a level gauge 18 is provided on the tower body 1, which is used to monitor the level of the washing liquid in the second chamber 13.

[0049] The spray pipe 5 is connected to a spray liquid discharge pipe 52, which in turn is equipped with a spray liquid discharge valve 521. The spray liquid discharge valve 521 is electrically connected to a level gauge 18. When the level of the washing liquid in the second chamber 13 is greater than or equal to a first preset value, the spray liquid discharge valve 521 opens so that the spray liquid discharge pipe 52 can discharge the washing liquid. Specifically, the level gauge 18 is connected to the spray liquid discharge valve 521 via an interlock signal line, thereby sending the level information to the spray liquid discharge valve 521. When there is too much washing liquid in the tower body 1, the spray liquid discharge valve 521 can be opened so that the washing liquid in the second chamber 13 can be discharged sequentially through the spray pipe and the spray liquid discharge pipe 52. The timely discharge of washing liquid containing high concentrations of organic salts significantly reduces the scaling phenomenon of the packing material.

[0050] like Figure 1As shown, in some embodiments, the tower body 1 is provided with a washing liquid discharge pipe 17 communicating with the second chamber 13, through which the washing liquid in the second chamber 13 can be discharged. Specifically, the washing liquid discharge pipe 17 is located at the upper part of the second chamber 13 in the vertical direction. This allows the washing liquid in the second chamber 13 to be discharged sequentially through the washing liquid discharge pipe 17 when there is excessive washing liquid in the tower body 1. This timely discharge of washing liquid containing high concentrations of organic salts significantly reduces scaling of the packing material.

[0051] like Figure 2 As shown, in some embodiments, the inlet of the packing return line 4 extends upward from the second cavity 13 into the packing bed 12, so that the packing material in the packing bed 12 can enter the inlet of the packing return line 4. Specifically, the inlet of the packing return line 4 is located at the center of the bottom of the packing bed 12.

[0052] The spray pipe 5 is equipped with a packing return flushing pipe 53 connected to it. The outlet of the packing return flushing pipe 53 extends into the second cavity 13 and is connected to the packing return pipe 4. The packing return flushing pipe 53 is used to flush the packing return pipe 4. Specifically, the washing liquid in the spray pipe 5 can be introduced into the packing return pipe 4 through the packing return flushing pipe 53 to flush the packing return pipe 4.

[0053] In some embodiments, the tower body 1 is provided with a water supply pipe 19 communicating with the second cavity 13, and a third pump body 191 is provided on the water supply pipe 19. And / or, the spray pipe 5 is provided with a washing liquid replenishment pipe 54 communicating with it. That is to say, the moving bed drip filtration alkaline washing tank according to the present invention is provided with at least one of the water supply pipe 19 and the washing liquid replenishment pipe 54, and water can be replenished through the water supply pipe 19, and washing liquid can be replenished through the washing liquid replenishment pipe 54.

[0054] like Figure 2 As shown, in some embodiments, the spray pipe 5 includes a first pipe section 501 and a second pipe section 502, and the second cavity 13, the first pipe section 501, the second pump body 55, the second pipe section 502 and the first cavity 11 are connected in sequence.

[0055] A pH measuring pipe 56 is installed on the spray pipe 5. The inlet of the pH measuring pipe 56 is connected to the second pipe section 502, and the outlet of the pH measuring pipe 56 is connected to the first pipe section 501. A pH meter 57 is installed on the pH measuring pipe 56. The washing liquid in the spray pipe 5 can be passed into the pH measuring pipe 56 and then back into the spray pipe 5, so that the pH meter 57 can measure the pH value of the washing liquid in the spray pipe 5.

[0056] The tower body 1 is equipped with an alkali dosing pipeline 7 connected to the second chamber 13. The alkali dosing pipeline 7 is used to introduce pH adjustment solution into the second chamber 13. A fourth pump body 71 is installed on the alkali dosing pipeline 7, and the fourth pump body 71 is electrically connected to a pH meter 57. Specifically, the fourth pump body 71 and the pH meter 57 are interlocked via an interlocking signal line, allowing the pH value monitored by the pH meter 57 to be sent to the fourth pump body 71. When it is necessary to adjust the washing solution in the second chamber 13, the fourth pump body 71 is activated to introduce pH adjustment solution into the second chamber 13. This ensures that the moving bed trickling filter alkali washing tank always maintains a stable and reliable operating state. For example, the alkali dosing pipeline 7 is used to introduce alkali solution into the second chamber 13.

[0057] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A moving bed drip filtration alkaline washing tank, characterized in that, include: The tower body includes a packed bed and a first cavity and a second cavity communicating with the packed bed. The first cavity, the packed bed, and the second cavity are arranged sequentially from top to bottom. The packed bed contains packing material. An air intake pipe is connected to the inlet of the first cavity, and the air intake pipe is used to introduce the gas to be processed into the first cavity. An exhaust pipe is provided, which is connected to the second cavity and is used to discharge gas from the second cavity. A packing return pipeline is provided, the inlet of which is connected to the bottom of the packing bed, the outlet of which extends into the first cavity, and a first pump body is provided on the packing return pipeline. The packing return pipeline and the first pump body cooperate to allow the packing at the bottom of the packing bed to be introduced into the first cavity. The spray pipe has an inlet connected to the second cavity and an outlet extending into the first cavity. The spray pipe can pass the washing liquid in the second cavity into the first cavity for spraying. The spray pipe is equipped with a second pump. A sludge discharge pipe is connected to the second cavity, through which sludge in the second cavity can be discharged.

2. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The first cavity is equipped with a disperser, at least a portion of the top surface of the disperser is a conical surface with a downwardly increasing diameter, and the outlet of the packing return pipeline is located directly above the disperser.

3. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The first cavity is provided with a reflux liquid storage tank. The washing liquid discharged from the packing reflux pipeline can be introduced into the reflux liquid storage tank. The outlet of the reflux liquid storage tank is connected to the bottom of the packing bed through the packing reflux flushing pipeline.

4. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The spray pipe is equipped with a bottom flushing pipe for the packing bed, and the outlet of the bottom flushing pipe for the packing bed extends into the bottom of the packing bed.

5. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The tower body is equipped with a level gauge, which is used to monitor the level of the washing liquid in the second chamber; The spray pipe is provided with a spray liquid discharge pipe connected to it. The spray liquid discharge pipe is provided with a spray liquid drain valve. The spray liquid drain valve is electrically connected to the liquid level gauge. When the liquid level of the washing liquid in the second cavity is greater than or equal to a first preset value, the spray liquid drain valve is opened so that the spray liquid discharge pipe can be used to discharge the washing liquid.

6. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The tower body is provided with a washing liquid discharge pipe that communicates with the second cavity, and the washing liquid in the second cavity can be discharged from the washing liquid discharge pipe.

7. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The inlet of the packing return pipeline extends upward from the second cavity into the packing bed, so that the packing material in the packing bed can enter the inlet of the packing return pipeline; The spray pipe is provided with a packing return flushing pipe connected to it. The outlet of the packing return flushing pipe extends into the second cavity and is connected to the packing return pipe. The packing return flushing pipe is used to flush the packing return pipe.

8. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The tower body is provided with a water supply pipeline that communicates with the second cavity, and a third pump body is provided on the water supply pipeline; And / or, the spray pipe is provided with a washing liquid replenishment pipe connected thereto.

9. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The spray pipeline includes a first pipe section and a second pipe section, and the second cavity, the first pipe section, the second pump body, the second pipe section and the first cavity are connected in sequence; The spray pipe is equipped with a pH measuring pipe, the inlet of which is connected to the second pipe section and the outlet of which is connected to the first pipe section. A pH meter is installed on the pH measuring pipe. The tower body is provided with an alkali dosing pipeline that communicates with the second cavity. The alkali dosing pipeline is used to introduce pH adjustment liquid into the second cavity. The alkali dosing pipeline is provided with a fourth pump body, which is electrically connected to the pH meter.

10. The moving bed drip filtration alkaline washing tank according to claim 1, characterized in that, The intake pipe is connected to the exhaust pipe via a bypass pipe.

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