High speed mixed ion exchange bed

Abstract

The utility model relates to a water treatment technical field, concretely relates to a high -speed mixed ion exchange bed. Including jar body, the upper end of jar body is provided with water distribution device, is provided with resin layer in the jar body below water distribution device, water distribution device includes the main pipe fixed in the dome of jar body, the lower end fixed communication of main pipe has the distributor, and the distributor is located in the dome of jar body, and the circumference of distributor is evenly distributed fixed communication and has a plurality of branch pipes, a plurality of water holes are seted up in the lower end of branch pipe, and an arc plate is seted up below branch pipe, and arc plate is concentric with branch pipe, and a plurality of ferrules are seted up on the branch pipe, and the ferrule is connected with arc plate through a plurality of struts fixedly. The utility model sets up arc plate, and water is sprayed from the water hole of branch pipe and impacts the inner edge of arc plate, and under the arc plate guiding effect, water disperses to three directions, and the distribution direction quantity is three times of the total number of branch pipe, avoids that water flow directly impacts the water distribution board below, thereby improves the uniformity and efficiency of water distribution.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a high-speed mixed ion exchange bed. Background Technology

[0002] The condensate polishing unit in a thermal power plant boiler is extremely important in the entire operation process. Its function is to deeply purify the condensate and feedwater from the thermal system, removing corrosion products generated by the thermal system, salts introduced by the feedwater, and impurities introduced by condenser leaks, providing the boiler with feedwater that meets quality standards. The high-speed mixed ion exchange bed is the main demineralization equipment in the condensate polishing system, and the water distribution device is one of the most important components within the high-speed mixed ion exchange bed. The operation of the water distribution device directly affects the water production rate and the regeneration frequency of the resin. If the water production rate does not meet the design requirements, it not only results in a huge waste of demineralized water and acids / alkalis used for regeneration, but also increases the discharge of high-salinity wastewater, affecting the entire system's operating cycle and economic benefits.

[0003] Currently, the most widely used water distribution device is a dome-shaped baffle combined with a perforated plate and a cap-type water distribution plate. Other moderately improved water distribution devices include inlet distribution devices in the form of a single upward-curving baffle with packing, a dome-shaped perforated water distribution plate, and a water distribution plate with a baffle plate. However, due to the high water flow velocity at the inlet pipe, the existing water distribution methods have limited water distribution capacity of the baffle. The water flow easily forms a "water hammer" that directly impacts the water distribution plate, and the baffle is very prone to deformation under high flow velocity impact, causing it to completely fail. Some inlet water can even directly impact the water distribution plate, and the water distribution plate is twisted and deformed under the continuous impact of the water hammer, exacerbating the uneven water distribution. Uneven water distribution causes the water flow entering the resin layer to have a bias phenomenon, and the flow velocity distribution is extremely uneven, resulting in large turbulence in the resin layer, reducing the effective resin layer height, and making it easy to leak corrosive ions at the end of operation, causing fluctuations in the effluent water quality. This, in turn, leads to defects such as the condensate polishing unit failing to reach the design load, large acid and alkali usage, resin leakage, and unit load fluctuations. Furthermore, equipment such as deformed water distribution plates and inlet baffles require frequent maintenance. Therefore, improving the uniformity of water distribution in the high-speed mixed ion exchange bed and extending its operating cycle are particularly important.

[0004] To improve water distribution efficiency, some improved water distribution devices include a distributor installed inside the dome. Multiple support rods are evenly distributed and fixed around the distributor, and multiple water holes are opened at the lower end of the support pipes. This type of water distribution device can effectively improve water distribution efficiency and disperse the impact force of incoming water, reducing the impact force on the water distribution plate locally. However, after long-term use, the position of the water distribution plate corresponding to the water holes is prone to being punctured, requiring the water distribution plate to be disassembled and repaired.

[0005] Patent document CN211998939U discloses a high-speed mixed ion exchange bed. By setting cross-arranged water distribution pipes at the inlet pipe outlet—one exiting vertically upwards along the pipe axis and the other exiting along the pipe axis—the direction of water flow entering the device is altered, avoiding direct impact on the water distribution plate and thus mitigating its deformation. This further reduces water jetting and turbulence above the distribution plate, improving the uniformity of water distribution. Additionally, the cross-arranged water distribution pipes with different outlet directions prevent water from entering the container solely from the edge of the distribution plate, improving the uniformity of flow velocity distribution within the water body and the uniformity of stress on the distribution plate, further reducing its deformation. Compared to traditional water distribution plates made by directly welding multiple plates or adding sealing strips between plates, this invention uses a spliced ​​design of male and female tenons, preventing high-speed water flow at the plate joints and thus preventing flow deviation at these points, reducing disturbance to the resin layer. However, in this technical solution, the water outlet from the distribution pipe cannot directly impact the water distribution plate, resulting in a decrease in the water distribution capacity of the device. Water distribution relies primarily on the water distribution plate, which operates under high pressure. Furthermore, the water distribution plate uses a combination of male and female tenons, making it inconvenient to disassemble damaged plates for repair. Therefore, further improvements to the existing water distribution device are necessary. Utility Model Content

[0006] The main purpose of this invention is to provide a high-speed mixed ion exchange bed that can improve the service life of the water distribution plate and facilitate the replacement of the water distribution plate.

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] A high-speed mixed ion exchange bed includes a tank body, a water distribution device at the upper end of the tank body, a resin layer inside the tank body below the water distribution device, the water distribution device including a main pipe fixed to the dome of the tank body, a distributor fixedly connected to the lower end of the main pipe, the distributor being located inside the dome of the tank body, and multiple branch pipes evenly distributed and fixedly connected to the distributor around its circumference, with multiple water holes at the lower end of the branch pipes, characterized in that an arc-shaped plate is provided below each branch pipe, the arc-shaped plate being concentric with the branch pipe, multiple collars being fitted on the branch pipes, the collars being fixedly connected to the arc-shaped plate by multiple support rods, and a combined water distribution assembly being provided inside the tank body below the multiple branch pipes.

[0009] Specifically, the collar is threaded with a locking bolt, which abuts against the outer edge of the branch pipe.

[0010] Specifically, the multiple water holes are evenly distributed along the axial direction of the branch pipe.

[0011] Specifically, the central angle of the arc-shaped plate is 150°.

[0012] Specifically, the combined water distribution assembly includes multiple water distribution plates, which are combined to form a circular plate. A support ring is fixed inside the tank below the circular plate. The water distribution plates and the support ring are connected by multiple fastening bolts. A support rod is provided below the opposite ends of two adjacent water distribution plates. The support rod is fixedly connected to the support ring. The water distribution plate and the support rod are fixedly connected by multiple fastening bolts. Multiple water distribution caps are installed on the water distribution plate.

[0013] Specifically, the opposite ends of the two adjacent water distribution plates are in sealed contact.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. By setting up an arc-shaped plate, water sprays out from the branch pipe water hole and impacts the inner edge of the arc-shaped plate. Under the guidance of the arc-shaped plate, the water is dispersed in three directions, and the number of distribution directions is three times the total number of branch pipes. This avoids the water flow directly impacting the water distribution plate below, thereby improving the uniformity and efficiency of water distribution.

[0016] 2. The ends of adjacent water distribution plates are sealed to ensure that water flows down only through the water distribution cap, preventing leakage or sideflow, and further ensuring the stability and reliability of the water distribution process.

[0017] 3. The arc plate can be replaced separately after it is damaged (through the structure of collar, support rod and locking bolt), without the need for overall disassembly, and the replacement cost is low.

[0018] 4. When the water distribution plate is damaged, it can be easily removed and repaired simply by unscrewing the fastening bolts. The combination of the support ring and support rod structure simplifies the maintenance operation and reduces downtime and labor costs. Attached Figure Description

[0019] Figure 1 This is a diagram showing the positional relationship between the water distribution device and the combined water distribution components.

[0020] Figure 2 This is a top view of the combined water distribution assembly.

[0021] Figure 3 This is a schematic diagram of a water distribution device.

[0022] Figure 4 This is a top view of the water distribution device.

[0023] Figure 5 for Figure 4 Sectional view along the AA direction.

[0024] The components in the attached diagram are named as follows: 1. Tank body, 2. Main pipe, 3. Distributor, 4. Branch pipe, 5. Arc plate, 6. Support rod, 7. Collar, 8. Locking bolt, 9. Support ring, 10. Support rod, 11. Water distribution plate, 12. Water distribution cap, 13. Fastening bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1: Refer to Figures 1-5 A high-speed mixed ion exchange bed includes a tank 1, a water distribution device is provided at the upper end of the tank 1, and a resin layer is provided inside the tank 1 below the water distribution device.

[0027] The water distribution device includes a main pipe 2 fixed on the dome of the tank body 1. A distributor 3 is fixedly connected to the lower end of the main pipe 2. The distributor 3 is located inside the dome of the tank body 1. Multiple branch pipes 4 are evenly distributed and fixedly connected to the distributor 3 around its circumference. Multiple water holes are opened at the lower end of the branch pipes 4. The multiple water holes are evenly distributed along the axial direction of the branch pipes 4.

[0028] Below each branch pipe 4, there is an arc-shaped plate 5, which is concentric with the branch pipe 4 and has a central angle of 150°. Multiple collars 7 are fitted on the branch pipe 4, and locking bolts 8 are threaded onto the collars 7. The locking bolts 8 are tightly pressed against the outer edge of the branch pipe 4. The collars 7 and the arc-shaped plate 5 are fixedly connected by multiple support rods 6.

[0029] A combined water distribution assembly is installed inside the tank 1 below multiple branch pipes 4.

[0030] The combined water distribution assembly includes multiple water distribution plates 11, which are combined to form a circular plate. A support ring 9 is fixed inside the tank 1 below the circular plate. The water distribution plates 11 and the support ring 9 are connected by multiple fastening bolts 13. A support rod 10 is provided below the opposite ends of two adjacent water distribution plates 11. The support rod 10 is fixedly connected to the support ring 9. The water distribution plates 11 and the support rods 10 are fixedly connected by multiple fastening bolts 13. Multiple water distribution caps 12 are installed on the water distribution plates 11.

[0031] In this embodiment, the water from the main pipe 2 enters the distributor 3 and then flows into multiple branch pipes 4. The water in the branch pipes 4 sprays out from the water holes and impacts the inner edge of the arc-shaped plate 5. Guided by the inner edge of the arc-shaped plate 5, some of the water that has entered the arc-shaped plate 5 is discharged from both ends of the arc-shaped plate 5 and the end of the arc-shaped plate 5 away from the distributor 3.

[0032] Under the guiding effect of the inner edge of the arc plate 5, the water discharged from the water hole is dispersed in three directions. By setting the arc plate 5 below the branch pipe 4, the number of water distribution directions is three times the total number of branch pipes 4. Therefore, the uniformity and efficiency of water distribution are further improved while avoiding the water sprayed from the water hole from directly impacting the water distribution plate 11.

[0033] If the arc plate 5 is damaged, it can be replaced separately, and the cost of replacing the arc plate 5 is low.

[0034] After water is discharged from the arc-shaped plate 5, it enters the area above the water distribution plate 11. The water above the water distribution plate 11 flows downward after passing through multiple water distribution caps 12.

[0035] When it is necessary to repair the damaged water distribution plate 11, the damaged water distribution plate 11 can be disassembled simply by removing the fastening bolts 13 connected to it. Therefore, it is convenient to disassemble and repair the damaged water distribution plate 11.

[0036] Example 2: Based on Example 1, the opposite ends of two adjacent water distribution plates 11 are sealed to ensure that water flows down only through the water distribution cap 12, preventing leakage or sideflow, and further ensuring the stability and reliability of the water distribution process.

[0037] 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 and improvements 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 high-speed mixed ion exchange bed, comprising a tank (1), a water distribution device provided at the upper end of the tank (1), a resin layer provided inside the tank (1) below the water distribution device, the water distribution device comprising a main pipe (2) fixed on the dome of the tank (1), a distributor (3) fixedly connected to the lower end of the main pipe (2), the distributor (3) being located inside the dome of the tank (1), and multiple branch pipes (4) evenly distributed and fixedly connected to the upper circumference of the distributor (3), the lower end of the branch pipes (4) having multiple water holes, characterized in that, Each branch pipe (4) is provided with an arc plate (5) below it. The arc plate (5) is concentric with the branch pipe (4). Multiple collars (7) are fitted on the branch pipe (4). The collars (7) and the arc plate (5) are fixedly connected by multiple support rods (6). A combined water distribution assembly is provided in the tank (1) below the multiple branch pipes (4).

2. The high-speed mixed ion exchange bed according to claim 1, characterized in that, The collar (7) is threaded with a locking bolt (8), which abuts against the outer edge of the branch pipe (4).

3. The high-speed mixed ion exchange bed according to claim 1, characterized in that, The multiple water holes are evenly distributed along the axial direction of the branch pipe (4).

4. The high-speed mixed ion exchange bed according to claim 1, characterized in that, The central angle of the arc plate (5) is 150°.

5. The high-speed mixed ion exchange bed according to claim 1, characterized in that, The combined water distribution assembly includes multiple water distribution plates (11), which are combined to form a circular plate. A support ring (9) is fixed inside the tank (1) below the circular plate. The water distribution plate (11) and the support ring (9) are connected by multiple fastening bolts (13). A support rod (10) is provided below the opposite ends of two adjacent water distribution plates (11). The support rod (10) is fixedly connected to the support ring (9). The water distribution plate (11) and the support rod (10) are fixedly connected by multiple fastening bolts (13). Multiple water distribution caps (12) are installed on the water distribution plate (11).

6. The high-speed mixed ion exchange bed according to claim 5, characterized in that, The opposite ends of the two adjacent water distribution plates (11) are in sealed contact.

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