A granular activated carbon regeneration tank, tank inside collecting pipe assembly and tank wall cooling structure

Abstract

This utility model discloses a granular activated carbon regeneration tank, an internal collection pipe assembly, and a tank wall cooling structure. The collection pipe assembly replaces the original water cap fixing plate, making full use of the space in the lower end cap and reducing the overall height of the regeneration tank. The tank wall cooling structure reduces heat conduction to the tank wall by applying an insulation layer to the inner wall of the regeneration tank, and cools the tank wall by introducing cooling water through a cooling water coil installed outside the regeneration tank, thereby extending the service life of the regeneration tank.

Description

Technical Field

[0001] This utility model relates to the field of activated carbon regeneration equipment, specifically a granular activated carbon regeneration tank, an internal collection pipe assembly, and a tank wall cooling structure. Background Technology

[0002] Granular activated carbon has been used for water purification for a long time. Utilizing its porous nature, it effectively adsorbs organic matter, colloids, microorganisms, and residual chlorine in water, thus achieving deep water purification. Currently, granular activated carbon is widely used in environmental protection, industrial, and domestic applications.

[0003] Activated carbon has a certain saturation value in its adsorption capacity. Once saturated, activated carbon needs to be regenerated (desorbed) to remove the adsorbed pollutants and restore its adsorption performance, thereby achieving the purpose of reuse.

[0004] Activated carbon regeneration refers to the reactivation of saturated activated carbon under certain conditions. There are many methods for activated carbon regeneration, such as thermal regeneration, biological regeneration, wet oxidation, solvent regeneration, electrochemical regeneration, and catalytic wet oxidation. Among these, thermal regeneration is the most widely used and industrially mature method, characterized by high regeneration efficiency and a wide range of applications.

[0005] The heating regeneration method generally consists of three stages: drying, high-temperature carbonization, and activation. In the drying stage, the main focus is on removing volatile components from the activated carbon. The high-temperature carbonization stage involves boiling and vaporizing some of the adsorbed organic matter on the activated carbon, causing some to decompose and release small-molecule hydrocarbons. The remaining components remain within the pores of the activated carbon, becoming "fixed carbon." In this stage, the temperature reaches 800-900℃. In the subsequent activation stage, gases such as CO2, CO, H2, or water vapor are introduced to clean the micropores of the activated carbon and restore its adsorption performance. Chinese invention patent applications CN109205727A and CN109205728A both employ the heating regeneration method for activated carbon regeneration.

[0006] Chinese invention patent CN116328747A discloses an activated carbon thermal circulation regeneration system and its process. The regeneration tank has a water cap fixing plate at the bottom to achieve a filtering effect. Activated carbon accumulates on the water cap fixing plate, and water flows out from the water cap. Under continuous high temperatures, the properties of the water cap fixing plate and the tank body's plates will decrease, leading to deformation, weld cracking, etc. This makes it easy for activated carbon to enter the thermal circulation pipes through cracks, causing adverse effects and reducing the service life of the regeneration tank. Utility Model Content

[0007] To address the aforementioned problems, this invention provides a granular activated carbon regeneration tank, including an internal collection pipe assembly and a tank wall cooling structure. This invention uses a collection pipe assembly instead of a water cap fixing plate, making full use of the space in the lower end cap. Furthermore, the addition of a tank wall cooling structure extends the service life of the regeneration tank.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] This utility model first provides an activated carbon regeneration tank internal collection pipe assembly, including a primary collection pipe, a secondary collection pipe, a tertiary collection pipe, collection branch pipes and a filter cap. Multiple secondary collection pipes are symmetrically arranged on both sides of the primary collection pipe. Multiple tertiary collection pipes are arranged along the length of each secondary collection pipe at its bottom. Multiple downwardly inclined collection branch pipes are arranged along the circumference of each tertiary collection pipe at its lower part. A filter cap is provided at the lower end of each collection branch pipe, and a screen is provided on the filter cap.

[0010] Furthermore, the primary collection pipe has a first flange at one end, which is connected to the steam outlet on the activated carbon regeneration tank, and a first cover plate at the other end. Several second flanges are symmetrically arranged on both sides of the primary collection pipe. The secondary collection pipe has a third flange at one end and a cap at the other end, and the third flange is connected to the second flange. The tertiary collection pipe has a fourth flange at the top, which is installed at the bottom of the secondary collection pipe. The bottom of the tertiary collection pipe has a second cover plate. Each tertiary collection pipe has 2 to 4 collection branch pipes evenly arranged at the bottom.

[0011] This utility model also provides a cooling structure for the tank wall of a granular activated carbon regeneration tank, including an insulation structure disposed inside the regeneration tank and a cooling water coil disposed outside the regeneration tank; the cooling water coil is wound around the tank body and the lower end cap; the insulation structure includes an insulation sealing plate, a sealing plate pressure strip, an inner insulation sealing plate of the end cap, and an insulation layer, the insulation layer is disposed on the inner wall of the tank body and the upper and lower end caps of the regeneration tank, multiple insulation sealing plates are wrapped around the insulation layer of the tank body, multiple inner insulation sealing plates of the end caps are wrapped around the insulation layer of the upper and lower end caps, and the sealing plate pressure strip is disposed on the insulation sealing plate and the inner insulation sealing plate of the end cap.

[0012] This utility model also provides a granular activated carbon regeneration tank, including a tank body, an upper end cap at the top of the tank body, and a lower end cap at the bottom of the tank body. An activated carbon inlet is opened at the center of the upper end cap, and an activated carbon outlet is opened at the center of the lower end cap, with a water filter installed on the activated carbon outlet. Multiple sets of spray pipe assemblies are evenly arranged inside the tank body, and multiple steam inlets are correspondingly provided on the tank body. Each set of spray pipe assemblies is connected to a steam inlet. A steam outlet is provided at the bottom of the tank body, and a collection pipe assembly connected to the steam outlet is provided in the lower part of the tank body and inside the lower end cap.

[0013] Furthermore, the granular activated carbon regeneration tank is equipped with a tank wall cooling structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The activated carbon regeneration tank collection pipe assembly provided by this utility model is used to replace the original water cap fixing plate in the regeneration tank, which can make full use of the space of the lower end cap and reduce the overall height of the regeneration tank. The collection pipe assembly has a simple structure, is easy to install and maintain, and can reduce manufacturing and processing costs. Moreover, the collection pipe assembly has good high temperature resistance, and the screen can effectively prevent activated carbon from entering the heat circulation pipe.

[0016] The granular activated carbon regeneration tank provided by this utility model has a tank wall cooling structure. An insulation layer is applied to the inner wall of the regeneration tank. During the activation process, the high temperature inside the regeneration tank is transferred to the tank wall through the insulation layer, thus lowering the temperature. Simultaneously, a cooling water coil is added to the outside of the regeneration tank, allowing cooling water to circulate and further cool the tank wall. This significantly reduces the tank wall temperature, protecting the properties of the regeneration tank material and extending the service life of the regeneration tank.

[0017] The granular activated carbon regeneration tank provided by this utility model, by replacing the original water cap fixing plate with a collection pipe assembly, can make full use of the space of the lower end cap and increase the activated carbon processing capacity inside the tank. The addition of an insulation structure extends the service life of the tank. This utility model not only ensures that the original process meets the requirements for activated carbon regeneration, maintaining the iodine value after regeneration, but also saves material and labor costs and facilitates subsequent installation and maintenance. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the overall structure of the granular activated carbon regeneration tank provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the collection pipe assembly inside the activated carbon regeneration tank provided by this utility model, wherein (a) is an arrangement diagram of the primary and secondary collection pipes, (b) is a structural schematic diagram of the primary collection pipe, (c) is a structural schematic diagram of the secondary collection pipe, (d) is a structural schematic diagram of the tertiary collection pipe, and (e) is... Figure 1 The AA section diagram, i.e., the layout diagram of the collection branch pipes;

[0022] Figure 3This is a schematic diagram of the internal insulation structure of the granular activated carbon regeneration tank provided by this utility model;

[0023] Figure 4 yes Figure 3 A magnified view of a section at point I;

[0024] Figure 5 This is a schematic diagram of the cooling water coil outside the granular activated carbon regeneration tank provided by this utility model;

[0025] Figure 6 This is a schematic diagram of a water filter.

[0026] Wherein: 1—Activated carbon inlet; 2—Tank body; 3—First steam inlet; 4—Second steam inlet; 5—Third steam inlet; 6—Steam outlet; 7—Activated carbon outlet; 8—Upper head; 9—Lower head; 20—Spray nozzle assembly; 50—Collection pipe assembly; 51—First-stage collection pipe; 52—Second-stage collection pipe; 53—Third-stage collection pipe; 54—Collection branch pipe; 55—Insulation sealing plate; 56—Sealing plate pressure strip; 57—Insulation sealing plate inside the head; 58—Insulation layer; 59—Fasteners; 6 0—Water filter; 61—Water filter cylinder; 62—Quartz sand; 63—Screen tube; 64—First cooling water coil; 65—Second cooling water coil; 66—First cooling water inlet; 67—First cooling water outlet; 68—Second cooling water inlet; 69—Second cooling water outlet; 71—First flange; 72—Second flange; 73—First cover plate; 74—Third flange; 75—End cap; 76—Fourth flange; 77—Second cover plate; 78—Filter cap; 79—Screen. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] The improvement of this utility model is that the original water cap fixing plate is replaced by a collection pipe assembly 50, such as... Figure 2As shown, the collecting pipe assembly 50 includes a primary collecting pipe 51, a secondary collecting pipe 52, a tertiary collecting pipe 53, a collecting branch pipe 54, and a filter cap 78. The primary collecting pipe 51 has a first flange 71 at one end, which connects to the steam outlet 6, and a first cover plate 73 at the other end. Several second flanges 72 are symmetrically arranged on both sides of the primary collecting pipe 51. The secondary collecting pipe 52 has a third flange 74 at one end and a cap 75 at the other end. The third flange 74 connects to the second flanges 72, thereby installing the secondary collecting pipe 52 onto both sides of the primary collecting pipe 51. The top of the tertiary collection pipe 53 is provided with a fourth flange 76, through which the tertiary collection pipe 53 is installed at the bottom of the secondary collection pipe 52. The bottom of the tertiary collection pipe 53 is provided with a second cover plate 77. The lower part of the tertiary collection pipe 53 is provided with 2 to 4 downwardly inclined collection branch pipes 54. The lower end of the collection branch pipe 54 is provided with a filter cap 78, and the filter cap 78 is provided with a screen 79. The screen 79 can prevent granular activated carbon and powdered carbon powder in the regeneration tank from entering the collection branch pipe 54.

[0029] Furthermore, such as Figure 1 As shown, this utility model applies the improved collection pipe assembly 50 to a regeneration tank, providing a novel granular activated carbon regeneration tank, including a tank body 2. The tank body 2 has an upper end cap 8 at its top and a lower end cap 9 at its bottom. An activated carbon inlet 1 is located at the center of the upper end cap 8, and an activated carbon outlet 7 is located at the center of the lower end cap 9. A water filter 60 is installed on the activated carbon outlet 7. Multiple sets of spray pipe assemblies 20 are evenly arranged inside the tank body 2 according to its height, and multiple steam inlets are correspondingly provided on the tank body 2. Each set of spray pipe assemblies 20 is connected to one steam inlet. Specifically, Figure 1 Three sets of nozzle assemblies 20 are arranged in the middle, respectively connected to the first steam inlet 3, the second steam inlet 4, and the third steam inlet 5 on the tank body 2. A steam outlet 6 is provided at the lower part of the tank body 2 near the lower head 9. A collection pipe assembly 50 is provided inside the tank body 2 and the lower head 9. The collection pipe assembly 50 is located below the nozzle assembly 20 and is connected to the steam outlet 6. When arranging the collection pipe assembly 50, the three-stage collection pipe 53 extends downward into the lower head 9, and the lower end of the collection branch pipe 54 is close to the bottom of the lower head. Several collection branch pipes 54 are evenly arranged inside the lower head 9.

[0030] Saturated granular activated carbon is transferred into the regeneration tank through activated carbon inlet 1, filling the tank body 2 and lower head 9. High-temperature steam enters the nozzle assembly 20 through the first steam inlet 3, the second steam inlet 4, and the third steam inlet 5, and is evenly sprayed into each layer of activated carbon through the bent pipe assembly 44, heating the granular activated carbon. After contacting the activated carbon, the high-temperature steam forms lower-temperature steam, which is collected from the collection branch pipe 54 arranged in the lower head 9, and then sequentially enters the tertiary collection pipe 53, the secondary collection pipe 52, and the primary collection pipe 51, before being discharged from the tank body 2 through the steam outlet 6. As high-temperature steam continues to flow in, the temperature of the activated carbon layer gradually increases from top to bottom, which also causes the activated carbon in the lower head 9 to continuously heat up. Since the collection branch pipe 54 is evenly distributed in the lower head 9, it can be ensured that the activated carbon in the lower head 9 can be heated evenly, so that the activated carbon in the lower head 9 can be fully activated and regenerated. After regeneration, the granular activated carbon is discharged from the regeneration tank through the activated carbon outlet 7.

[0031] This utility model uses a collection pipe assembly 50 to replace the original water cap fixing plate, making full use of the space of the lower end cap, which can reduce the overall height of the regeneration tank. The collection pipe assembly 50 has a simple structure, is easy to install and maintain, and can reduce manufacturing and processing costs. Moreover, the collection pipe assembly 50 has good high temperature resistance, and the screen can effectively prevent activated carbon from entering the heat circulation pipe.

[0032] Since the granular activated carbon is transferred using hydraulic conveying into the regeneration tank, the water in the regeneration tank must be drained before activation. Therefore, a water filter 60 is installed at the activated carbon outlet 7. Figure 6 As shown, the water filter 60 consists of a water filter cylinder 61, quartz sand 62, and a screen tube 63. The quartz sand 62 and the screen tube 63 are installed inside the water filter cylinder 61, which can block the activated carbon and only discharge water.

[0033] Furthermore, the properties of the plates used in the recycling tank, such as the tank body 2, upper end cap 8, and lower end cap 9, deteriorate under continuous high temperatures, leading to problems like deformation and weld cracking, thus reducing the service life of the recycling tank. Therefore, this invention also includes a tank wall cooling structure, comprising an insulation structure inside the recycling tank and cooling water coils outside the tank. The cooling water coils are wound around the tank body 2 and lower end cap 9, and the number of cooling water coils can be adjusted according to specific circumstances.

[0034] like Figure 3 and Figure 4As shown, the insulation structure includes an insulation sealing plate 55, a sealing plate pressure strip 56, an inner insulation sealing plate 57 for the end cap, and an insulation layer 58. The insulation layer 58 is attached to the inner walls of the tank body 2, the upper end cap 8, and the lower end cap 9, and then sealed with the insulation sealing plate 55 and the inner insulation sealing plate 57 for the end cap. The insulation sealing plate 55 and the inner insulation sealing plate 57 for the end cap are then fixed with the sealing plate pressure strip 56 and fasteners 59. When the high temperature inside the regeneration tank is transferred to the tank wall through the insulation layer 58, the temperature will decrease.

[0035] like Figure 5 As shown, two sets of cooling water coils are welded to the outside of the regeneration tank, namely a first cooling water coil 64 and a second cooling water coil 65. The first cooling water coil 64 has a first cooling water inlet 66 at its upper end and a first cooling water outlet 67 at its lower end. The second cooling water coil 65 has a second cooling water inlet 68 at its upper end and a second cooling water outlet 69 at its lower end. During the activated carbon regeneration process, cooling water is introduced into the first cooling water inlet 66 and the second cooling water inlet 68. After passing through the first cooling water coil 64 and the second cooling water coil 65, the cooling water flows out from the first cooling water outlet 67 and the second cooling water outlet 69, thereby cooling the tank wall of the regeneration tank.

[0036] By installing an insulation structure inside the regeneration tank and a cooling water coil outside the regeneration tank, the tank wall temperature during activated carbon regeneration can be greatly reduced. This significantly protects the properties of the regeneration tank material and extends the service life of the regeneration tank.

[0037] The above is a further detailed description of the present utility model in conjunction with specific embodiments, and it should not be considered that the specific implementation of the present utility model is limited to this. For those skilled in the art to which the present utility model pertains and related fields, any extensions, operation methods, and data substitutions made based on the technical solution concept of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A collection pipe assembly inside an activated carbon regeneration tank, characterized in that: It includes a primary collection pipe (51), a secondary collection pipe (52), a tertiary collection pipe (53), a collection branch pipe (54), and a filter cap (78). The primary collection pipe (51) has multiple secondary collection pipes (52) symmetrically arranged on both sides. Each secondary collection pipe (52) has multiple tertiary collection pipes (53) arranged along its length at the bottom. Each tertiary collection pipe (53) has multiple downwardly inclined collection branch pipes (54) arranged along its circumference at the bottom. The lower end of the collection branch pipe (54) is provided with a filter cap (78), and the filter cap (78) is provided with a screen (79).

2. The collection pipe assembly inside the activated carbon regeneration tank according to claim 1, characterized in that: The first-stage collection pipe (51) has a first flange (71) at one end, which is connected to the steam outlet on the activated carbon regeneration tank, and a first cover plate (73) at the other end. Several second flanges (72) are symmetrically arranged on both sides of the first-stage collection pipe (51). The second-stage collection pipe (52) has a third flange (74) at one end and a cap (75) at the other end. The third flange (74) is connected to the second flange (72). The third-stage collection pipe (53) has a fourth flange (76) at the top. The fourth flange (76) is installed at the bottom of the second-stage collection pipe (52). The bottom of the third-stage collection pipe (53) has a second cover plate (77). Each third-stage collection pipe (53) has 2 to 4 collection branch pipes (54) evenly arranged at the bottom.

3. A cooling structure for the tank wall of a granular activated carbon regeneration tank, characterized in that: The device includes an insulation structure installed inside the regeneration tank and a cooling water coil installed outside the regeneration tank; the cooling water coil is wound around the tank body (2) and the lower end cap (9); the insulation structure includes an insulation sealing plate (55), a sealing plate pressure strip (56), an inner insulation sealing plate (57) of the end cap, and an insulation layer (58); the insulation layer (58) is installed on the inner wall of the tank body and the upper and lower end caps of the regeneration tank; multiple insulation sealing plates (55) are wrapped around the insulation layer of the tank body; multiple inner insulation sealing plates (57) of the end caps are wrapped around the insulation layer of the upper and lower end caps; and the sealing plate pressure strip (56) is installed on the insulation sealing plate (55) and the inner insulation sealing plate (57) of the end cap.

4. A granular activated carbon regeneration tank having an internal collection pipe assembly as described in claim 1 or 2, characterized in that: The tank includes a tank body (2), with an upper end cap (8) at the top and a lower end cap (9) at the bottom. An activated carbon inlet (1) is opened at the center of the upper end cap (8), and an activated carbon outlet (7) is opened at the center of the lower end cap (9). A water filter (60) is provided on the activated carbon outlet (7). Multiple sets of spray pipe assemblies (20) are evenly arranged inside the tank body (2), and multiple steam inlets are provided on the tank body (2). Each set of spray pipe assemblies (20) is connected to a steam inlet. A steam outlet (6) is provided at the bottom of the tank body (2), and a collection pipe assembly (50) connected to the steam outlet (6) is provided in the lower part of the tank body (2) and inside the lower end cap (9).

5. The granular activated carbon regeneration tank according to claim 4, characterized in that: The granular activated carbon regeneration tank is equipped with a tank wall cooling structure as described in claim 3.

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