A mixed bed maintenance structure

Abstract

The utility model provides a kind of mixed bed maintenance structure, it includes: mixed bed;Shell is set to mixed bed outside, the bottom of its inner cavity is filled with the resin, middle row pipe, horizontal setting is in the middle part of resin, and its one end extends to the outside of shell and is connected with middle row pipe channel;Three-way valve, its first interface is connected with the exposed end of middle row pipe, and the second interface is connected with the middle row pipe channel;Liquid inlet pipe is connected to the third interface of three-way valve;Regeneration water pump, its outlet end is connected to liquid inlet pipe;Desalination water supply device is connected to the inlet end of regeneration water pump;By switching the on-off state of three-way valve, middle row pipe selectively communicates with the middle row pipe channel or liquid inlet pipe, to realize the conversion of drainage mode and backwashing mode, the utility model can quickly realize the conversion of drainage mode and backwashing mode, compared with traditional mixed bed maintenance mode, greatly improve the efficiency of mixed bed maintenance operation, reduce the time and energy cost of manual switching, can quickly respond to the different maintenance needs of mixed bed.

Description

Technical Field

[0001] This utility model relates to a maintenance structure, specifically a mixed bed maintenance structure. Background Technology

[0002] In industrial production, especially in water treatment, mixed beds are key equipment for achieving deep water purification. They effectively remove anions and cations from water using ion exchange resins, producing high-purity water, and are widely used in industries such as power, chemicals, and electronics. However, with prolonged operation, problems such as aging of internal components and deterioration of resin performance gradually emerge, making maintenance a necessary step to ensure stable operation of the mixed bed.

[0003] Currently, traditional methods are commonly used for the internal maintenance of mixed bed reactors. This involves removing all of the resin (tens of tons) from the reactor before maintenance personnel enter the equipment for inspection and repair. After repair, the resin must be reintroduced. This method has several drawbacks: First, the resin removal and reintroduction work is not only labor-intensive and resource-intensive, but also extremely demanding, severely testing the physical and mental strength of the operators. Second, maintenance personnel must enter the equipment, which is a confined space with potential risks such as oxygen deficiency, accumulation of harmful gases, and mechanical injuries, seriously threatening the safety of the workers. Third, the entire maintenance process is cumbersome, taking more than five days from resin removal and equipment repair to resin reintroduction, resulting in prolonged equipment downtime, significantly impacting production efficiency and increasing operating costs for the company. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a mixed bed maintenance structure, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model includes:

[0006] Mixed bed;

[0007] A housing is disposed on the outside of the mixing bed, and the bottom of its inner cavity is filled with the resin;

[0008] The central drain pipe is horizontally positioned in the middle of the resin, with one end extending to the outside of the shell and connecting to the central drain pipe.

[0009] The three-way valve has a first port connected to the exposed end of the central drain pipe and a second port connected to the central drain pipe.

[0010] The inlet pipe is connected to the third port of the three-way valve;

[0011] A reclaimed water pump, the outlet of which is connected to the inlet pipe;

[0012] A demineralized water supply device is connected to the inlet end of the reclaimed water pump;

[0013] By switching the conduction state of the three-way valve, the middle drain pipe can be connected to either the middle drain pipe or the liquid inlet pipe to achieve the switching between the liquid discharge mode and the backwashing mode.

[0014] Preferably, the middle row pipe has multiple through holes evenly formed on its wall, the diameter of the through holes is 1-5mm, and the total area of ​​the through holes is 2-3 times the cross-sectional area of ​​the middle row pipe.

[0015] Preferably, the through holes are arranged in a spiral along the axial direction of the middle row of pipes, and the axial distance between two adjacent rows of through holes is 50-100mm.

[0016] Preferably, the three-way valve is an electric three-way ball valve, and its valve body is equipped with a sensor for detecting the valve position status, the sensor being connected to an external control system.

[0017] Preferably, the demineralized water supply device includes a storage tank and a connecting pipeline. The storage tank is equipped with a conductivity meter, and the connecting pipeline is connected in series with a precision filter and a check valve.

[0018] Preferably, the reclaimed water pump is a variable frequency centrifugal pump, and a flow meter and a pressure gauge are installed on its outlet pipeline. The flow meter is interlocked with the frequency converter of the reclaimed water pump for control.

[0019] Beneficial effects: It can quickly switch between drainage mode and backwashing mode, which greatly improves the efficiency of mixed bed maintenance operations compared with traditional mixed bed maintenance methods, reduces the time and effort costs of manual switching, and can quickly respond to different maintenance needs of mixed beds.

[0020] Uniform Liquid Distribution: The specially designed through-holes on the wall of the intermediate drain pipe, with their pore size, total area, and spiral arrangement, ensure uniform liquid distribution during drainage and backwashing. During drainage, this ensures complete discharge of waste liquid; during backwashing, demineralized water evenly washes the resin, avoiding dead zones and significantly improving resin regeneration, thus guaranteeing the stability of the mixed-bed ion exchange performance.

[0021] Extended equipment lifespan: The rational structural design and precise control reduce damage to resin and equipment caused by improper operation, effectively extending the service life of the mixing bed, resin and other related components, and reducing the frequency of equipment replacement and maintenance costs. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate 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, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] The following are the labels in the diagram: 1. Shell; 2. Resin; 3. Mixed bed; 4. Central drain pipe; 5. Three-way valve; 6. Inlet pipe; 7. Regenerated water pump; 8. Demineralized water. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 The specific embodiments of this utility model will be described in further detail.

[0026] Implementation examples, by Figure 1 This utility model provides a mixed bed maintenance structure, comprising:

[0027] Mixed bed 3;

[0028] The housing 1 is disposed outside the mixing bed 3, and the bottom of its inner cavity is filled with the resin 2;

[0029] The central drain pipe 4 is horizontally positioned in the middle of the resin 2, with one end extending to the outside of the housing 1 and communicating with the central drain pipe.

[0030] The three-way valve 5 has a first port connected to the exposed end of the central drain pipe 4 and a second port connected to the central drain pipe.

[0031] The inlet pipe 6 is connected to the third port of the three-way valve 5;

[0032] The regenerated water pump 7 has its outlet end connected to the inlet pipe 6;

[0033] The demineralized water supply device 8 is connected to the inlet end of the reclaimed water pump 7;

[0034] By switching the conduction state of the three-way valve 5, the central drain pipe 4 can be selectively connected to either the central drain pipe or the liquid inlet pipe 6 to achieve the switching between the liquid discharge mode and the backwashing mode.

[0035] Shell 1: Shell 1 serves as the basic load-bearing component of the entire structure, and its inner cavity is filled with resin 2 at the bottom. The shell provides a stable working environment for the internal components, protects the internal resin and other components from external interference, and ensures sealing during mixed bed maintenance.

[0036] Mixed bed 3: Composed of shell 1 and resin at the bottom, it is the core equipment for ion exchange. During normal operation, it purifies the water by exchanging ions with the resin; during maintenance, it works with other components to regenerate and clean the resin.

[0037] Central drain pipe 4: The central drain pipe 4 is horizontally positioned in the middle of the resin 2, with one end extending to the outside of the shell 1 and connecting to the central drain pipe. Multiple through holes are evenly distributed on the wall of the central drain pipe, with a diameter of 1-5 mm. The total area of ​​the through holes is 2-3 times the cross-sectional area of ​​the central drain pipe 4. This design ensures uniform liquid distribution and smooth flow. The through holes are arranged spirally along the axial direction of the central drain pipe 4, with an axial spacing of 50-100 mm between adjacent rows of through holes, further optimizing the liquid flow path and improving the drainage and backwashing effects. In drainage mode, the central drain pipe is used to discharge waste liquid from the mixed bed; in backwashing mode, it serves as the inlet channel for backwashing liquid, cleaning and regenerating the resin.

[0038] Three-way valve 5: Three-way valve 5 is an electric three-way ball valve. Its first port is connected to the exposed end of the central drain pipe 4, the second port is connected to the central drain pipe, and the third port is connected to the inlet pipe 6. By switching the conduction state of three-way valve 5, the central drain pipe 4 can be selectively connected to either the central drain pipe or the inlet pipe 6, thereby realizing the conversion between the drain mode and the backwash mode. The valve body is equipped with a sensor for detecting the valve position status. This sensor is connected to the external control system signal to ensure that the operator can accurately grasp the working status of the three-way valve and realize remote monitoring and precise control.

[0039] Inlet pipe 6: Inlet pipe 6 is connected to the third port of three-way valve 5. In backwashing mode, it serves as a channel for regenerated liquid or demineralized water to enter the middle drain pipe, transporting the liquid into the mixed bed to rinse and regenerate the resin.

[0040] Reclaimed water pump 7: Reclaimed water pump 7 is a variable frequency centrifugal pump, with its outlet end connected to the inlet pipe 6. The function of the reclaimed water pump is to provide power for the backwashing process, delivering demineralized water from the demineralized water supply device to the mixed bed. A flow meter and pressure gauge are installed on the outlet pipe. The flow meter is interlocked with the frequency converter of reclaimed water pump 7, allowing for precise adjustment of the pump's flow rate and pressure according to actual needs, ensuring the stability and effectiveness of the backwashing process.

[0041] Demineralized water supply device 8: The demineralized water supply device 8 includes a storage tank and connecting pipelines. The storage tank is equipped with a conductivity meter to monitor the water quality of the demineralized water in real time, ensuring that the demineralized water entering the mixed bed meets regeneration requirements. A precision filter and a check valve are connected in series on the connecting pipelines. The precision filter further removes impurities from the demineralized water, preventing impurities from entering the mixed bed and affecting resin performance; the check valve prevents backflow of liquid, ensuring the safety and stability of the system operation.

[0042] Working Principle: In the drainage mode, the electric three-way ball valve (three-way valve 5) switches to a specific state, connecting the intermediate drainage pipe 4 with the intermediate drainage pipeline. At this time, the waste liquid generated by ion exchange in the mixed bed 3 flows to the intermediate drainage pipe 4 located in the middle of the resin 2 under the action of gravity or system pressure. Because multiple through holes are evenly distributed on the wall of the intermediate drainage pipe 4, and the diameter, total area and arrangement of the through holes are specially designed, the waste liquid can smoothly and evenly enter the interior of the intermediate drainage pipe through these through holes, and then extend to the connection part on the outside of the shell 1 through the intermediate drainage pipe, and finally be discharged from the mixed bed system through the intermediate drainage pipeline, completing the waste liquid discharge.

[0043] When backwashing and regeneration of the resin in the mixed bed is required, the three-way valve 5 is switched to another state, connecting the intermediate drain pipe 4 to the inlet pipe 6, thus entering backwashing mode. The storage tank in the demineralized water supply device 8 stores demineralized water that meets the requirements. A conductivity meter inside the tank monitors the quality of the demineralized water in real time to ensure it meets regeneration standards. After further impurity removal by a precision filter on the connecting pipeline, the demineralized water is drawn from the inlet of the demineralized water supply device 8 by the regeneration water pump 7. After being pressurized by the regeneration water pump 7, it flows along the outlet pipe to the inlet pipe 6. At this time, the demineralized water enters the three-way valve 5 through the inlet pipe 6, and then enters the mixed bed through the intermediate drain pipe 4 connected to the three-way valve 5.

[0044] The reclaimed water pump 7 is a variable frequency centrifugal pump. A flow meter and pressure gauge installed on its outlet pipe can monitor the liquid flow and pressure in real time. The flow meter is interlocked with the frequency converter of the reclaimed water pump 7, allowing operators to precisely control the flow and pressure of the demineralized water by adjusting the frequency converter through an external control system according to actual needs. Under suitable flow and pressure, the demineralized water is sprayed out from the through-hole to thoroughly rinse the resin 2, washing away impurities, ions, and other contaminants adsorbed on the resin surface and inside. The rinsed wastewater is then discharged from the mixed bed through the through-hole of the central drain pipe, achieving resin regeneration, restoring its ion exchange capacity, and ensuring the subsequent normal operation of the mixed bed.

[0045] Beneficial effects: It can quickly switch between drainage mode and backwashing mode, which greatly improves the efficiency of mixed bed maintenance operations compared with traditional mixed bed maintenance methods, reduces the time and effort costs of manual switching, and can quickly respond to different maintenance needs of mixed beds.

[0046] Uniform Liquid Distribution: The specially designed through-holes on the walls of the four central drain pipes, with their pore diameter, total area, and spiral arrangement, ensure uniform liquid distribution during drainage and backwashing. During drainage, this ensures complete discharge of waste liquid; during backwashing, demineralized water evenly washes the resin, avoiding dead zones and significantly improving resin regeneration, thus guaranteeing the stability of the mixed-bed ion exchange performance.

[0047] Extended equipment lifespan: The rational structural design and precise control reduce damage to resin and equipment caused by improper operation, effectively extending the service life of the mixing bed, resin and other related components, and reducing the frequency of equipment replacement and maintenance costs.

[0048] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mixed-bed maintenance structure, characterized in that, include: Mixed bed (3); The shell (1) is located outside the mixing bed (3), and its inner cavity bottom is filled with resin (2). The middle drain pipe (4) is horizontally positioned in the middle of the resin (2), with one end extending to the outside of the shell (1) and communicating with the middle drain pipe. The three-way valve (5) has its first port connected to the exposed end of the central drain pipe (4) and its second port connected to the central drain pipe. The inlet pipe (6) is connected to the third port of the three-way valve (5); The outlet end of the regenerated water pump (7) is connected to the inlet pipe (6); A demineralized water supply device (8) is connected to the inlet end of a reclaimed water pump (7); By switching the conduction state of the three-way valve (5), the middle drain pipe (4) can be connected to either the middle drain pipe or the liquid inlet pipe (6) to realize the conversion between the liquid discharge mode and the backwashing mode.

2. The mixed-bed maintenance structure according to claim 1, characterized in that: The middle pipe (4) has multiple through holes evenly opened on its pipe wall. The diameter of the through holes is 1-5mm, and the total area of ​​the through holes is 2-3 times the cross-sectional area of ​​the middle pipe (4).

3. The mixed-bed maintenance structure according to claim 2, characterized in that: The through holes are arranged in a spiral along the axial direction of the middle row of pipes (4), and the axial distance between two adjacent rows of through holes is 50-100mm.

4. A mixed-bed maintenance structure according to claim 3, characterized in that: The three-way valve (5) is an electric three-way ball valve, and its valve body is equipped with a sensor for detecting the valve position status. The sensor is connected to the signal of the external control system.

5. A mixed-bed maintenance structure according to claim 4, characterized in that: The demineralized water supply device (8) includes a storage tank and a connecting pipe. The storage tank is equipped with a conductivity meter, and the connecting pipe is connected in series with a precision filter and a check valve.

6. A mixed-bed maintenance structure according to claim 5, characterized in that: The regenerated water pump (7) is a variable frequency centrifugal pump, and a flow meter and a pressure gauge are installed on its outlet pipeline. The flow meter is interlocked with the frequency converter of the regenerated water pump (7).

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