Mixed ion exchange control device and control system

Abstract

The utility model discloses a mixed ion exchange control device which comprises a filter shell and an exhaust port, an upper water distributor and a tube plate are sequentially arranged in the filter shell from top to bottom, the upper water distributor is connected with a water inlet and a backwashing drainage port through a first pipeline, a plurality of filter caps are arranged on the tube plate, an anion resin layer is arranged above the tube plate, and the anion resin layer is connected with the filter caps through a second pipeline. A cation resin layer is arranged above the anion resin layer, the anion resin layer is connected with a middle water outlet through a second pipeline, the cation resin layer is connected with an alkali regeneration liquid inlet through an alkali inlet pipeline, and the lower end of the filter shell is sequentially provided with an acid regeneration liquid inlet, a washing water outlet, an air inlet, a backwashing water inlet and a water outlet through a third pipeline; a resin discharging opening is formed below the middle water discharging opening, an upper maintenance inlet is formed above the middle water discharging opening, a lower maintenance inlet is formed below the resin discharging opening, and the exhaust opening is connected to the interior of the filter shell through an exhaust pipeline. The utility model further discloses a control system based on the mixed ion exchange control device. Remote control can be achieved, the regeneration period is long, and the regenerated water amount is small.

Description

Technical Field

[0001] The utility model relates to a mixed ion exchange control device and a control system. Background Art

[0002] In the prior art, the backwashing technology of resin still adopts a relatively backward fully manual mode, and the connection of process pipelines is not perfect. The backwashing process requires a lot of manpower. Moreover, the conventional mixed ion exchanger uses ordinary mixed bed resin with relatively low temperature resistance, the filling height of the resin layer is relatively high, the configuration of the middle drain pipeline in the supporting of the mixed bed is relatively simple without the positioning function of the regeneration water level, and the mixed bed uses plastic water caps which are easily damaged after long-term operation. Therefore, a mixed ion exchange control device and a control system are provided. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the existing defects and provide a mixed ion exchange control device and a control system, which can realize remote control, long regeneration period and less regeneration water volume.

[0004] The technical solution to achieve the above purpose is as follows:

[0005] A mixed ion exchange control device of the utility model includes: a filter housing and an exhaust port. Inside the filter housing, a top distributor and a tube sheet are sequentially arranged from top to bottom. The top distributor is connected to a water inlet and a backwash drain port through a first pipeline. A plurality of filter caps are arranged on the tube sheet. An anion resin layer is arranged above the tube sheet, and a cation resin layer is arranged above the anion resin layer. The anion resin layer is connected to a middle drain port through a second pipeline. The cation resin layer is connected to an alkali inlet regeneration liquid port through an alkali inlet pipeline. The lower end of the filter housing is sequentially provided with an acid inlet regeneration liquid port, a normal wash drain port, an air inlet, a backwash water inlet and a water outlet through a third pipeline. A resin discharge port is arranged below the middle drain port, an upper maintenance inlet is arranged above the middle drain port, a lower maintenance inlet is arranged below the resin discharge port, and the exhaust port is connected to the inside of the filter housing through an exhaust pipeline.

[0006] Preferably, the ratio of the anion resin layer to the cation resin layer is 1:2, and there is a certain distance between the upper part of the cation resin layer and the top distributor.

[0007] Preferably, the water inlet and the backwash drain port are symmetrically arranged, and a sampling port is arranged on one side of the water inlet.

[0008] Preferably, the acid inlet regeneration liquid port and the normal wash drain port are symmetrically arranged, the backwash water inlet and the water outlet are symmetrically arranged, and a pressure gauge is arranged on one side of the water outlet.

[0009] Preferably, a solenoid valve is provided at each of the water inlet, backwash drain outlet, intermediate drain outlet, caustic regeneration liquid inlet, acid regeneration liquid inlet, normal wash drain outlet, air inlet, backwash water inlet, water outlet, resin discharge port, and exhaust port.

[0010] Preferably, a conductivity meter and a silica meter are provided at the normal wash drain outlet, and a resin catcher is provided at the water outlet.

[0011] Preferably, it further includes: a sight glass and a support frame. Three of the sight glasses are sequentially provided on the side of the filter housing from top to bottom, and the lower end of the filter housing is supported on the ground by three of the support frames.

[0012] A control system of a mixed ion exchange control device according to the second aspect of the present invention includes:

[0013] A control module for controlling the actions of each of the solenoid valves on site by outputting control instructions;

[0014] A resin exchange module for controlling and exchanging the corresponding solenoid valves by obtaining a resin exchange instruction to perform an exchange operation;

[0015] A resin regeneration module for obtaining a control instruction for regeneration and controlling and regenerating the corresponding solenoid valves to perform a regeneration operation;

[0016] A normal wash module for obtaining a control instruction for normal wash and controlling and normal washing the corresponding solenoid valves to perform a normal wash operation;

[0017] A backwash module for obtaining a control instruction for backwash and controlling and backwashing the corresponding solenoid valves to perform a backwash operation;

[0018] A data change module for changing the data of the regeneration process time and the regeneration interval period.

[0019] Preferably, the control module adopts a dual control mode of on-site control by a PLC (programmable logic controller) and remote control by a DCS (distributed control system), uses the values of the conductivity meter and the silica meter on site as setpoint signals, and controls the actions of the solenoid valves by outputting contact signals.

[0020] The beneficial effects of the present utility model are as follows: By leaving a certain distance between the upper part of the cation resin layer and the upper water distributor, and using high-temperature resins for both the anion resin layer and the cation resin layer, the present utility model can increase the inlet water temperature of the mixed bed by 10°C, playing a role in energy conservation and emission reduction. The filling height of the resin is reduced by 15%, making the regeneration operation relatively simple; the caustic inlet pipe and the third pipe are both set as positioning elbows, which can give the feeding amount of acid and caustic during acid-base regeneration, making the regeneration operation relatively simple; the filter cap uses a fully metal water cap with higher strength, reducing the breakage rate of the filter cap; and through the dual-control mode of on-site PLC control and remote DCS control, the degree of automation is high, remote and on-site control can be achieved, and it has the characteristics of a long regeneration cycle and less regeneration water volume. Brief Description of the Drawings

[0021] Figure 1 is a structural diagram of a mixed ion exchange control device of the present utility model;

[0022] Figure 2 is a side sectional view of a mixed ion exchange control device of the present utility model;

[0023] Figure 3 is a top view of a mixed ion exchange control device of the present utility model;

[0024] Figure 4 is a module diagram of a control system based on a mixed ion exchange control device of the present utility model.

[0025] In the figure: 1, filter shell; 2, upper water distributor; 3, tube sheet; 4, filter cap; 5, anion resin layer; 6, cation resin layer; 7, water inlet; 8, backwash drain port; 9, intermediate drain port; 10, caustic regeneration liquid inlet; 11, acid regeneration liquid inlet; 12, normal wash drain port; 13, air inlet; 14, backwash water inlet; 15, water outlet; 16, resin discharge port; 17, upper maintenance inlet; 18, lower maintenance inlet; 19, exhaust port; 20, first pipe; 21, caustic inlet pipe; 22, third pipe; 23, exhaust pipe; 24, sight glass; 25, support frame; 71, sampling port; 91, second pipe; 151, pressure gauge. Specific Embodiments

[0026] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] The present utility model will be further described below in conjunction with the accompanying drawings.

[0028] As Figures 1-3 shown, a mixed ion exchange control device includes: a filter housing 1 and an exhaust port 19. Inside the filter housing 1, a top distributor 2 and a tube sheet 3 are sequentially arranged from top to bottom. The top distributor 2 is connected to a water inlet 7 and a backwash drain port 8 through a first pipeline 20. A plurality of filter caps 4 are arranged on the tube sheet 3. An anion resin layer 5 is arranged above the tube sheet 3, and a cation resin layer 6 is arranged above the anion resin layer 5. The anion resin layer 5 is connected to an intermediate drain port 9 through a second pipeline 91. The cation resin layer 6 is connected to an alkali regeneration liquid inlet 10 through an alkali inlet pipeline 21. The lower end of the filter housing 1 is sequentially provided with an acid regeneration liquid inlet 11, a normal wash drain port 12, an air inlet 13, a backwash water inlet 14 and a water outlet 15 through a third pipeline 22. A resin discharge port 16 is arranged below the intermediate drain port 9, an upper maintenance inlet 17 is arranged above the intermediate drain port 9, and a lower maintenance inlet 18 is arranged below the resin discharge port 16. The exhaust port 19 is connected to the inside of the filter housing 1 through an exhaust pipeline 23.

[0029] In the embodiment, the filter cap 4 adopts an all-metal water cap with higher strength, reducing the breakage rate of the filter cap.

[0030] In the embodiment, the alkali inlet pipeline 21 and the third pipeline 22 are both set as positioning elbow pipes, which can give the feeding amount of acid and alkali during acid-base regeneration, making the regeneration operation relatively simple.

[0031] In the embodiment, the ratio of the anion resin layer 5 to the cation resin layer 6 is 1:2. There is a certain distance between the upper part of the cation resin layer 6 and the top distributor 2, and the filling height of the resin drops by 15%, making the regeneration operation relatively simple. Moreover, both the anion resin layer 5 and the cation resin layer 6 adopt high-temperature resins, which can increase the inlet water temperature of the mixed bed by 10°C, playing a role in energy conservation and emission reduction.

[0032] In the embodiment, the water inlet 7 and the backwash drain port 8 are symmetrically arranged, and a sampling port 71 is arranged on one side of the water inlet 7.

[0033] In the embodiment, the acid inlet for regeneration liquid port 11 and the normal washing drain port 12 are symmetrically arranged, the backwashing inlet 14 and the outlet 15 are symmetrically arranged, and a pressure gauge 151 is arranged on one side of the outlet 15.

[0034] In the embodiment, a solenoid valve is arranged at each of the water inlet 7, the backwashing drain port 8, the intermediate drain port 9, the alkali inlet for regeneration liquid port 10, the acid inlet for regeneration liquid port 11, the normal washing drain port 12, the air inlet 13, the backwashing inlet 14, the outlet 15, the resin unloading port 16 and the exhaust port 19.

[0035] In the embodiment, the solenoid valves are controlled by a dual-control mode of on-site control by PLC and remote control by DCS, with a high degree of automation and the ability to achieve remote and on-site control.

[0036] In the embodiment, a conductivity meter and a silica meter are arranged at the normal washing drain port 12, and a resin catcher is arranged at the outlet 15, and the broken resin is intercepted by the filter basket in the resin catcher.

[0037] As Figure 1 、 2 shown, a mixed ion exchange control device further includes: a sight glass 24 and a support frame 25. Three sight glasses 24 are sequentially arranged on the side of the filter housing 1 from top to bottom, and the lower end of the filter housing 1 is supported on the ground by three support frames 25.

[0038] As Figure 4 shown, a mixed ion exchange control system includes: a control module 100, a resin exchange module 200, a resin regeneration module 300, a normal washing module 400, a backwashing module 500 and a data modification module 600.

[0039] The control module 100 is used to control the actions of each of the solenoid valves on-site by outputting control instructions.

[0040] In the embodiment, the control module 100 adopts a dual-control mode of on-site control by PLC and remote control by DCS, uses the values of the conductivity meter and the silica meter on-site as setpoint signals, and controls the actions of the solenoid valves by outputting contact signals.

[0041] The resin exchange module 200 is used to control the corresponding solenoid valves for exchange operations by obtaining the resin exchange instruction.

[0042] The resin regeneration module 300 is used to control the corresponding solenoid valves for regeneration operations by obtaining the control instruction for regeneration.

[0043] The normal washing module 400 is used to control the corresponding solenoid valves for normal washing operations by obtaining the control instruction for normal washing.

[0044] The backwashing module 500 is used to obtain the control instruction for backwashing, control the solenoid valve corresponding to backwashing, and perform the backwashing operation.

[0045] The data change module 600 is used to change the data of the regeneration process time and the regeneration interval period.

[0046] Working principle:

[0047] When the mixed bed operates normally, the medium enters the filter housing 1 through the upper water distributor 2 from the water inlet 7, and after the exchange effect of the anion resin layer 5 and the cation resin layer 6 in the filter housing 1, it flows out from the lower water outlet 15. The broken resin is intercepted by the filter basket in the resin catcher. The medium flows through the anion resin layer 5 and the cation resin layer 6 in the filter housing 1, and the cations and anions in the water react with the resin for exchange, removing the cations and anions in the water. After the anion resin layer 5 and the cation resin layer 6 are saturated with the adsorption of cations and anions and can no longer remove ions, the anion resin layer 5 and the cation resin layer 6 in the filter housing 1 are regenerated with acid-base solutions through the acid regeneration liquid inlet 11 and the alkali regeneration liquid inlet 10.

[0048] The regeneration operation process is as follows:

[0049] Resin stratification: Through the control of the control module 100, the solenoid valve at the air inlet 13 is opened, and gas is introduced through the air inlet 13 at the bottom of the filter housing 1 to perform the stratification operation by blowing.

[0050] Resin regeneration: Through the control of the control module 100, the solenoid valves at the alkali regeneration liquid inlet 10 and the acid regeneration liquid inlet 11 are opened. First, a 3%-5% alkali solution is introduced through the alkali regeneration liquid inlet 10 to regenerate the anion resin, and then a 3%-5% acid solution is introduced through the acid regeneration liquid inlet 11 to regenerate the cation resin, or the acid-base solutions can be introduced simultaneously to regenerate the anion and cation resins, that is, the regeneration operation is completed.

[0051] The flushing operation process is as follows:

[0052] Resin flushing: Through the control of the control module 100, the solenoid valves at the water inlet 7, the normal washing drain outlet 12, the backwashing water inlet 14, and the backwashing drain outlet 8 are opened, and demineralized water is introduced simultaneously through normal washing or backwashing to flush the resin until the pH value of the water drained from the backwashing drain outlet 8 or the normal washing drain outlet 12 reaches neutral.

[0053] Resin mixing: Through the control of the control module 100, the solenoid valves at the air inlet 13 and the exhaust outlet 19 are controlled, and compressed air is introduced through the air inlet 13 to uniformly mix the stratified anion and cation resins in the filter housing 1, and the gas is then discharged from the exhaust outlet 19.

[0054] Positive flushing: Control is issued through the control module 100 to control the solenoid valves at the water inlet 7 and the positive flushing outlet 12 to open, and desalted water is introduced from the water inlet 7. The flushing operation is stopped when the conductivity and silica values ​​at the positive flushing outlet 12 meet the requirements, that is, the flushing operation is completed.

[0055] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A hybrid ion exchange control device, characterized in that, Comprising: A filter housing (1) and an exhaust port (19). Inside the filter housing (1), a top water distributor (2) and a tube sheet (3) are sequentially arranged from top to bottom. The top water distributor (2) is connected to a water inlet (7) and a backwash drain port (8) through a first pipeline (20). A plurality of filter caps (4) are arranged on the tube sheet (3). An anion resin layer (5) is arranged above the tube sheet (3), and a cation resin layer (6) is arranged above the anion resin layer (5). The anion resin layer (5) is connected to an intermediate drain port (9) through a second pipeline (91). The cation resin layer (6) is connected to an alkali inlet for regeneration (10) through an alkali inlet pipeline (21). At the lower end of the filter housing (1), an acid inlet for regeneration (11), a normal wash drain port (12), an air inlet (13), a backwash water inlet (14), and a water outlet (15) are sequentially arranged through a third pipeline (22). A resin discharge port (16) is arranged below the intermediate drain port (9), an upper maintenance inlet (17) is arranged above the intermediate drain port (9), and a lower maintenance inlet (18) is arranged below the resin discharge port (16). The exhaust port (19) is connected to the inside of the filter housing (1) through an exhaust pipeline (23).

2. The hybrid ion exchange control device according to claim 1, wherein The ratio of the anion resin layer (5) to the cation resin layer (6) is 1:2, and there is a certain distance between the upper part of the cation resin layer (6) and the top water distributor (2).

3. The hybrid ion exchange control device according to claim 1, characterized in that, The water inlet (7) and the backwash drain port (8) are symmetrically arranged, and a sampling port (71) is arranged on one side of the water inlet (7).

4. A mixed ion exchange control device according to claim 1, characterized in that, The acid inlet for regeneration (11) and the normal wash drain port (12) are symmetrically arranged, the backwash water inlet (14) and the water outlet (15) are symmetrically arranged, and a pressure gauge (151) is arranged on one side of the water outlet (15).

5. The hybrid ion exchange control device according to claim 1, characterized in that An electromagnetic valve is arranged at each of the water inlet (7), the backwash drain port (8), the intermediate drain port (9), the alkali inlet for regeneration (10), the acid inlet for regeneration (11), the normal wash drain port (12), the air inlet (13), the backwash water inlet (14), the water outlet (15), the resin discharge port (16), and the exhaust port (19).

6. The hybrid ion exchange control device according to claim 1, characterized in that, A conductivity meter and a silica meter are arranged at the normal wash drain port (12), and a resin catcher is arranged at the water outlet (15).

7. An ion exchange control device according to claim 1, wherein Further comprising: A sight glass (24) and a support frame (25). Three sight glasses (24) are sequentially arranged on the side of the filter housing (1) from top to bottom, and the lower end of the filter housing (1) is supported on the ground by three support frames (25).

8. A control system for a mixed ion exchange control device, characterized in that, Comprising: A control module for controlling the actions of each electromagnetic valve on site by outputting control instructions; A resin exchange module for obtaining an incoming resin exchange instruction, controlling and exchanging the corresponding electromagnetic valves, and performing an exchange operation; A resin regeneration module for obtaining an incoming regeneration control instruction, controlling and regenerating the corresponding electromagnetic valves, and performing a regeneration operation; A normal wash module for obtaining an incoming normal wash control instruction, controlling and normal washing the corresponding electromagnetic valves, and performing a normal wash operation; A backwash module for obtaining an incoming backwash control instruction, controlling and backwashing the corresponding electromagnetic valves, and performing a backwash operation; Data change module for changing the data of the regeneration process time and the regeneration interval period.

9. The control system of a hybrid ion exchange control device according to claim 8, characterized in that, The control module adopts a dual-control mode of PLC on-site control and DCS remote control. The values of the conductivity meter and the silica meter on-site are used as setpoint signals, and the action of the solenoid valve is controlled by outputting contact signals.

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