A forward and reverse washing free chlorine removal device
Patent Information
- Application Number
- CN202522317354.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0003]本实用新型为解决现有技术中存在的采用活性炭化学吸收法脱除游离氯的装置清洗困难且清洗效果不佳的技术问题，提供了一种正反洗游离氯去除装置
本实用新型提供的正反洗游离氯去除装置，塔体的外部设置有第一管道，第一管道的上端与上腔室连通，第一管道的下端封闭，第一管道上连接有第一接口和第二接口；第一接口为进水口，第二接口为反洗排水口。塔体的外部设置有第二管道，第二管道的上端封闭，第二管道的下端与下腔室连通；第二管道上连接有第三接口、第四接口、第五接口及第六接口；第三接口为反洗进水口，第四接口为出水口，第五接口为正洗排水口，第二接口为进气口。该装置从进水口通入清洁水，清洁水经第一管道到达活性炭填充床的上方，并经过活性炭后进入第二管道，从正洗排水口排出，以实现正向清洗。从反洗进水口通入清洁水，清洁水经第二管道到达活性炭填充床的下方，随着清洁水的液位升高，清洁水经过活性炭后进入第一管道，从反洗排水口排出，以实现反向清洗。该装置通过正向清洗和反向清洗，大幅提高了清洗效果，保证了装置去除游离氯的能力稳定。
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Figure CN224883752U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical equipment technology, and in particular to a forward and reverse washing device for removing free chlorine. Background Technology
[0002] In the production of caustic soda using an ion-exchange membrane, sodium chloride is electrolyzed to produce caustic soda. The raw salt contains sulfate ions, and adding sodium sulfite to the brine system can also cause sulfate ion levels to rise. Therefore, a portion of the dechlorinated brine is separated from sulfate ions using a MRO membrane to prevent sulfate accumulation, which would otherwise lead to increased voltage in the electrolyzer and decreased electrolysis efficiency. The dechlorinated brine that needs to pass through the MRO membrane filter may still contain trace amounts of free chlorine (including HClO or ClO). － The presence of free chlorine can damage the structure of MRO membranes, leading to membrane failure, decreased membrane performance, and shortened lifespan. To ensure the normal separation performance and lifespan of MRO membranes, they must be maintained within a suitable pH and temperature range. Therefore, pretreatment with brine is necessary before it enters the membrane filter to remove residual free chlorine and adjust its temperature and pH to the ideal range. Existing activated carbon chemical absorption methods for removing free chlorine are difficult to clean and have poor cleaning effects; their ability to remove free chlorine decreases significantly with increased usage time. Utility Model Content
[0003] This invention addresses the technical problem of difficult cleaning and poor cleaning effect of existing devices that use activated carbon chemical absorption to remove free chlorine, by providing a forward and reverse washing device for removing free chlorine.
[0004] To achieve the above objectives, this utility model provides the following technical solution: A forward and reverse washing device for removing free chlorine includes: a tower body; the tower body is configured as a closed chamber structure; The tower body is equipped with an activated carbon packed bed, the area above the activated carbon packed bed is designated as the upper chamber, and the area below the activated carbon packed bed is designated as the lower chamber; The tower body is provided with a first pipe on its exterior. The upper end of the first pipe is connected to the upper chamber, and the lower end of the first pipe is closed. The first pipe is connected to a first interface and a second interface. The first interface is a water inlet, and the second interface is a backwash drain outlet. A second pipe is provided on the outside of the tower body. The upper end of the second pipe is closed, and the lower end of the second pipe is connected to the lower chamber. A third interface, a fourth interface, a fifth interface, and a sixth interface are connected to the second pipe. The third interface is a backwash water inlet, the fourth interface is a water outlet, the fifth interface is a forward wash water outlet, and the sixth interface is an air inlet. Each of the first, second, third, fourth, fifth, and sixth interfaces has a built-in individual switching valve.
[0005] Based on the above technical solution, the present invention can be further improved as follows.
[0006] Furthermore, the tower body is equipped with a vent pipe and a vent valve.
[0007] Furthermore, at least one observation window is provided on the side of the tower body.
[0008] Furthermore, an inspection port is provided on the side and bottom of the tower body respectively.
[0009] Furthermore, a horizontally arranged support plate is fixed inside the tower body, and the support plate is provided with multiple through holes; the activated carbon packed bed is arranged on the support plate.
[0010] Furthermore, a connector is fixed to the lower outer end of the tower body for fixed connection with other components.
[0011] Compared with the prior art, the forward and reverse washing free chlorine removal device provided by this utility model has the following beneficial effects: The present invention provides a forward and reverse washing free chlorine removal device. A first pipe is installed outside the tower body, with its upper end connected to the upper chamber and its lower end closed. The first pipe has a first interface and a second interface connected to it; the first interface is a water inlet, and the second interface is a backwash drain outlet. A second pipe is also installed outside the tower body, with its upper end closed and its lower end connected to the lower chamber. The second pipe has a third interface, a fourth interface, a fifth interface, and a sixth interface connected to it; the third interface is a backwash water inlet, the fourth interface is a water outlet, the fifth interface is a forward wash drain outlet, and the second interface is an air inlet. Clean water is introduced into the device through the water inlet, flows through the first pipe to the top of the activated carbon packed bed, passes through the activated carbon, enters the second pipe, and is discharged from the forward wash drain outlet, thus achieving forward washing. Clean water is also introduced through the backwash water inlet, flows through the second pipe to the bottom of the activated carbon packed bed, and as the water level rises, it passes through the activated carbon and enters the first pipe, then is discharged from the backwash drain outlet, thus achieving reverse washing. This device significantly improves the cleaning effect through forward and reverse cleaning, ensuring a stable ability to remove free chlorine. Attached Figure Description
[0012] Figure 1 A schematic diagram of the forward and reverse washing free chlorine removal device provided in this embodiment of the utility model; Figure 2 This is another structural schematic diagram of the forward and reverse washing free chlorine removal device provided in this embodiment of the utility model.
[0013] Among them, 1-tower body, 2-activated carbon packed bed, 3-first pipe, 4-second pipe, 5-first interface, 6-second interface, 7-third interface, 8-fourth interface, 9-fifth interface, 10-sixth interface, 11-vent pipe and vent valve, 12-observation window, 13-connector, 14-support plate. Detailed Implementation
[0014] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.
[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
[0016] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.
[0017] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.
[0018] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.
[0019] See Figure 1 and Figure 2 This utility model provides a forward and reverse washing free chlorine removal device, including: a tower body 1; the tower body 1 is configured as a closed chamber structure, and the tower body 1 is cylindrical in shape. An activated carbon packed bed 2 is disposed inside the tower body 1, and the activated carbon packed bed 2 is fixed on a horizontally arranged support plate 14 inside the tower body 1. The support plate 14 has multiple evenly arranged through holes to facilitate liquid passage. The activated carbon packing is cylindrical in shape, and its exterior can be covered with a material with good permeability. The height of the activated carbon packed bed 2 is set to 1.5m, and the diameter is set to 2m. The area above the activated carbon packed bed 2 is designated as the upper chamber, and the area below the activated carbon packed bed 2 is designated as the lower chamber.
[0020] The tower body 1 is provided with a first pipe 3 on its exterior. The upper end of the first pipe 3 is connected to the upper chamber, and the lower end of the first pipe 3 is closed. The first interface 5 and the second interface 6 are connected to the first pipe 3. The first interface 5 is a water inlet, which is used to introduce brine to be adsorbed or clean water for forward cleaning of the device. The second interface 6 is a backwash drain outlet, which is used to discharge the sewage after reverse cleaning.
[0021] A second pipe 4 is installed on the outside of the tower body 1. The upper end of the second pipe 4 is closed, and the lower end of the second pipe 4 is connected to the lower chamber. The second pipe 4 is connected to a third interface 7, a fourth interface 8, a fifth interface 9, and a sixth interface 10. Among them, the third interface 7 is the backwash water inlet, used to introduce clean water for reverse cleaning; the fourth interface 8 is the water outlet, used to discharge the brine after adsorption treatment (i.e., brine with chloride ions removed); the fifth interface 9 is the forward wash water outlet, used to discharge the wastewater after forward cleaning; the sixth interface 10 is the air inlet, used to introduce pressurized gas into the tower body 1. Backwashing requires slight pressurization of the device's air to solve the problem of uneven backwashing after activated carbon caking. The pressurized air loosens the activated carbon, ensuring that all resin is loosened and all carbon fragments are washed out. The first interface 5, the second interface 6, the third interface 7, the fourth interface 8, the fifth interface 9, and the sixth interface 10 have built-in individual switch valves, which can be turned on and off independently.
[0022] In a preferred embodiment provided in this example, see [link to preferred embodiment]. Figure 1 and Figure 2The tower body 1 is equipped with a vent pipe and a vent valve 11 for venting high-pressure gas inside the tower body 1, ensuring its safe operation. At least one observation window 12 is provided on the side of the tower body 1, allowing personnel to observe the real-time operating conditions inside the tower body 1 from the outside. An inspection port is provided on the side and bottom of the tower body 1, facilitating personnel access for maintenance. A connector 13 is fixed to the lower exterior of the tower body 1 for secure connection with other components, allowing the tower body 1 to be installed in the designed location.
[0023] See Figure 1 and Figure 2 The working process of the forward and reverse washing free chlorine removal device provided in this embodiment of the invention is as follows: During forward washing, the first port 5 and the fifth port 9 are opened, while the second port 6, the third port 7, the fourth port 8, and the sixth port 10 are closed. Clean water is introduced through the first port 5, flows through the first pipe 3 to the top of the activated carbon packed bed 2, passes through the activated carbon, enters the second pipe 4, and is discharged from the fifth port 9, thus achieving forward washing. During reverse washing, the third port 7 and the second port 6 are opened, and clean water is introduced through the third port 7. The clean water flows through the second pipe 4 to the bottom of the activated carbon packed bed 2. As the level of the clean water rises, it passes through the activated carbon, enters the first pipe 3, and is discharged from the second port 6, thus achieving reverse washing.
[0024] See Figure 1 and Figure 2 The forward and reverse washing free chlorine removal device provided in this embodiment of the invention has the following beneficial effects: The forward and reverse washing free chlorine removal device provided in this embodiment of the utility model has a first pipe 3 installed on the outside of the tower body 1. The upper end of the first pipe 3 is connected to the upper chamber, and the lower end of the first pipe 3 is closed. The first interface 5 and the second interface 6 are connected to the first pipe 3. The first interface 5 is a water inlet, and the second interface 6 is a backwash drain outlet. A second pipe 4 is installed on the outside of the tower body 1. The upper end of the second pipe 4 is closed, and the lower end of the second pipe 4 is connected to the lower chamber. The second pipe 4 is connected to a third interface 7, a fourth interface 8, a fifth interface 9, and a sixth interface 10. The third interface 7 is a backwash water inlet, the fourth interface 8 is a water outlet, the fifth interface 9 is a forward washing drain outlet, and the second interface 6 is an air inlet. Clean water is introduced into the device through the water inlet. The clean water reaches the top of the activated carbon packed bed 2 through the first pipe 3, passes through the activated carbon, enters the second pipe 4, and is discharged from the forward washing drain outlet to achieve forward washing. Clean water is introduced through the backwash inlet and flows through the second pipe 4 to the bottom of the activated carbon packed bed 2. As the water level rises, the clean water passes through the activated carbon and enters the first pipe 3, eventually being discharged from the backwash outlet, thus achieving reverse cleaning. This device significantly improves the cleaning effect through both forward and reverse cleaning, ensuring a stable ability to remove free chlorine.
[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A forward and reverse washing device for removing free chlorine, characterized in that: include: tower body; The tower body is configured as a closed chamber structure; The tower body is equipped with an activated carbon packed bed, the area above the activated carbon packed bed is designated as the upper chamber, and the area below the activated carbon packed bed is designated as the lower chamber; The tower body is provided with a first pipe on its exterior. The upper end of the first pipe is connected to the upper chamber, and the lower end of the first pipe is closed. The first pipe is connected to a first interface and a second interface. The first interface is a water inlet, and the second interface is a backwash drain outlet. A second pipe is provided on the outside of the tower body. The upper end of the second pipe is closed, and the lower end of the second pipe is connected to the lower chamber. A third interface, a fourth interface, a fifth interface, and a sixth interface are connected to the second pipe. The third interface is a backwash water inlet, the fourth interface is a water outlet, the fifth interface is a forward wash water outlet, and the second interface is an air inlet. Each of the first, second, third, fourth, fifth, and sixth interfaces has a built-in individual switching valve.
2. The forward and reverse washing free chlorine removal device according to claim 1, characterized in that: The tower body is equipped with a vent pipe and a vent valve.
3. The forward and reverse washing free chlorine removal device according to claim 1, characterized in that: The tower body has at least one observation window on its side.
4. The forward and reverse washing free chlorine removal device according to claim 1, characterized in that: An inspection port is provided on the side and bottom of the tower body.
5. The forward and reverse washing free chlorine removal device according to claim 1, characterized in that: A horizontally arranged support plate is fixed inside the tower body, and the support plate is provided with multiple through holes; the activated carbon packed bed is arranged on the support plate.
6. The forward and reverse washing free chlorine removal device according to claim 1, characterized in that: The lower outer end of the tower body is fixed with a connector for fixed connection with other components.