Mixed bed regeneration device with pressure regulation function

Abstract

A mixed bed regeneration device with a pressure regulation function comprises a first mixed bed, the first mixed bed comprises a first mixed bed tank body, a first water inlet pneumatic valve, a first high-pressure adjusting electromagnetic valve, a first conventional washing pneumatic valve, a first backwashing pneumatic valve, a first conventional washing drainage pneumatic valve, a first nitrogen inlet pneumatic valve, a first circulating pneumatic valve, a first water production pneumatic valve, a first exhaust pneumatic valve, a first alkali inlet pneumatic valve and a first intermediate discharge pneumatic valve; the system comprises a first low-pressure adjusting solenoid valve, a first backwashing drainage pneumatic valve, a first pressure transmitter and a first resistivity meter. According to the utility model, the high-pressure adjusting solenoid valve, the low-pressure adjusting solenoid valve and the pipeline pressure are used for adjusting the pressure of the mixed bed tank body, the pressure of the mixed bed tank body can be adjusted to be consistent with the pipeline before the pneumatic valve acts, the pressures on two sides of the valve plate are ensured to be the same when the valve acts, and the air cylinder can execute opening and closing actions without pressure accumulation when the valve plate is opened; the valve plate acts at a constant speed, the valve is opened and closed more smoothly, and generation of valve opening water hammers is reduced.

Description

Technical Field

[0001] The utility model relates to the field of physics, in particular to a water treatment device, in particular to a mixed bed regeneration device with pressure regulation. Background Art

[0002] A mixed bed is a device that removes ions from water by mixing anionic and cationic resins. As an important step in pure water treatment, it is widely used in semiconductor, solar energy, power plant and other industries. After the mixed bed resin is saturated with adsorption, it needs to be regenerated, and regeneration is generally performed in the tank. Large-scale pure water systems generally have multiple sets of mixed beds running in parallel, and a spare mixed bed is set up; when the operating mixed bed resin is saturated with adsorption, it is necessary to stop producing water for regeneration, and the spare mixed bed needs to be put into operation; because the pressure in the operating mixed bed tank is higher, and the pressure in the spare mixed bed tank is lower, there is a large pressure difference on both sides of the valve when the automatic valve is switched, which makes it difficult for the automatic valve plate to open; at the same time, because the pneumatic valve needs to accumulate enough air pressure to overcome the pressure difference on both sides of the valve plate to open, the valve plate rotates too fast due to the pressure release at the moment of opening, and severe water hammer occurs when opening, causing great noise and pipeline vibration, and even pipeline rupture in severe cases. Summary of the invention

[0003] The utility model aims to provide a mixed bed regeneration device with pressure regulation, which solves the technical problem in the prior art that the valve is difficult to open when switching the standby mixed bed.

[0004] The utility model discloses a mixed bed regeneration device with pressure regulation, comprising a first mixed bed, a third mixed bed, a water inlet, a regeneration water inlet, an alkali inlet, a nitrogen inlet, a water production inlet, a circulation inlet, a pressure drain outlet, and a gravity drain outlet;

[0005] The first mixed bed includes a first mixed bed tank, a first water inlet pneumatic valve, a first high-pressure regulating solenoid valve, a first forward wash pneumatic valve, a first backwash pneumatic valve, a first forward wash drainage pneumatic valve, a first nitrogen inlet pneumatic valve, a first circulation pneumatic valve, a first water production pneumatic valve, a first exhaust pneumatic valve, a first alkali inlet pneumatic valve, a first middle exhaust pneumatic valve, a first low-pressure regulating solenoid valve, a first backwash drainage pneumatic valve, a first pressure transmitter, and a first resistivity meter;

[0006] The water inlet is connected to the first water inlet pneumatic valve and the first mixed bed tank body through a pipeline, the first mixed bed tank body is connected to the water production port through a pipeline and a first water production pneumatic valve, and the outlet of the first mixed bed tank body is provided with a first resistivity meter; the inlet of the first mixed bed tank body is connected to the water inlet through a first high-pressure regulating solenoid valve, and the inlet of the first mixed bed tank body is provided with a first pressure transmitter, and the outlet of the first mixed bed tank body is also connected to the gravity drain port through a pipeline and a first low-pressure regulating solenoid valve; the outlet of the first mixed bed tank body is connected to the regeneration water inlet through a pipeline and a first backwash pneumatic valve, and the inlet of the first mixed bed tank body is connected to the regeneration water inlet through a pipeline and a first backwash pneumatic valve. The drainage pneumatic valve is connected to the pressure drainage port; the first mixed bed tank body is connected to the gravity drainage port through a pipeline and a first exhaust pneumatic valve, and the first mixed bed tank body is connected to the gravity drainage port through a pipeline and a first middle exhaust pneumatic valve; the first mixed bed tank body is connected to the alkali inlet through a pipeline and a first alkali inlet pneumatic valve; the first mixed bed tank body is connected to the nitrogen inlet through a pipeline and a first nitrogen inlet pneumatic valve; the first mixed bed tank body is connected to the regeneration water inlet through a pipeline and a first forward washing pneumatic valve, and the first mixed bed tank body is connected to the pressure drainage port through a pipeline and a first drainage pneumatic valve; the first mixed bed tank body is connected to the circulation port through a pipeline and a first circulation pneumatic valve;

[0007] The third mixed bed includes a third mixed bed tank, a third water inlet pneumatic valve, a third high-pressure regulating solenoid valve, a third forward washing pneumatic valve, a third backwashing pneumatic valve, a third forward washing drainage pneumatic valve, a third nitrogen inlet pneumatic valve, a third circulation pneumatic valve, a third water production pneumatic valve, a third exhaust pneumatic valve, a third alkali inlet pneumatic valve, a third middle exhaust pneumatic valve, a third low-pressure regulating solenoid valve, a third backwashing drainage pneumatic valve, a third pressure transmitter, and a third resistivity meter;

[0008] The water inlet is connected to the third water inlet pneumatic valve and the third mixed bed tank body through a pipeline, the third mixed bed tank body is connected to the water production port through a pipeline and a third water production pneumatic valve, and the outlet of the third mixed bed tank body is provided with a third resistivity meter; the inlet of the third mixed bed tank body is connected to the water inlet through a third high-pressure regulating solenoid valve, and the inlet of the third mixed bed tank body is provided with a third pressure transmitter, and the outlet of the third mixed bed tank body is also connected to the gravity drain port through a pipeline and a third low-pressure regulating solenoid valve; the outlet of the third mixed bed tank body is connected to the regeneration water inlet through a pipeline and a third backwash pneumatic valve, and the inlet of the third mixed bed tank body is connected to the regeneration water inlet through a pipeline and a third backwash pneumatic valve. The water discharge pneumatic valve is connected to the pressure drain port; the third mixed bed tank body is connected to the gravity drain port through a pipeline and a third exhaust pneumatic valve, and the third mixed bed tank body is connected to the gravity drain port through a pipeline and a third middle exhaust pneumatic valve; the third mixed bed tank body is connected to the alkali inlet through a pipeline and a third alkali inlet pneumatic valve; the third mixed bed tank body is connected to the nitrogen inlet through a pipeline and a third nitrogen inlet pneumatic valve; the third mixed bed tank body is connected to the regeneration water inlet through a pipeline and a third forward washing pneumatic valve, and the third mixed bed tank body is connected to the pressure drain port through a pipeline and a third water discharge pneumatic valve; the third mixed bed tank body is connected to the circulation port through a pipeline and a third circulation pneumatic valve.

[0009] Furthermore, it also includes a second mixed bed, which includes a second mixed bed tank, a second water inlet pneumatic valve, a second high-pressure regulating solenoid valve, a second forward wash pneumatic valve, a second backwash pneumatic valve, a second forward wash drainage pneumatic valve, a second nitrogen inlet pneumatic valve, a second circulation pneumatic valve, a second water production pneumatic valve, a second exhaust pneumatic valve, a second alkali inlet pneumatic valve, a second middle exhaust pneumatic valve, a second low-pressure regulating solenoid valve, a second backwash drainage pneumatic valve, a second pressure transmitter, and a second resistivity meter;

[0010] The water inlet is connected to the second water inlet pneumatic valve and the second mixed bed tank body through a pipeline, the second mixed bed tank body is connected to the water production port through a pipeline and a second water production pneumatic valve, and the outlet of the second mixed bed tank body is provided with a second resistivity meter; the inlet of the second mixed bed tank body is connected to the water inlet through a second high-pressure regulating solenoid valve, and the inlet of the second mixed bed tank body is provided with a second pressure transmitter, and the outlet of the second mixed bed tank body is also connected to the gravity drain port through a pipeline and a second low-pressure regulating solenoid valve; the outlet of the second mixed bed tank body is connected to the regeneration water inlet through a pipeline and a second backwash pneumatic valve, and the inlet of the second mixed bed tank body is connected to the second backwash pneumatic valve through a pipeline and a second backwash valve. The water discharge pneumatic valve is connected to the pressure drain port; the second mixed bed tank body is connected to the gravity drain port through a pipeline and a second air discharge pneumatic valve, and the second mixed bed tank body is connected to the gravity drain port through a pipeline and a second middle air discharge pneumatic valve; the second mixed bed tank body is connected to the alkali inlet through a pipeline and a second alkali inlet pneumatic valve; the second mixed bed tank body is connected to the nitrogen inlet through a pipeline and a second nitrogen inlet pneumatic valve; the second mixed bed tank body is connected to the regeneration water inlet through a pipeline and a second forward washing pneumatic valve, and the second mixed bed tank body is connected to the pressure drain port through a pipeline and a second water discharge pneumatic valve; the second mixed bed tank body is connected to the circulation port through a pipeline and a second circulation pneumatic valve.

[0011] Compared with the prior art, the utility model has a positive and obvious effect. The utility model uses a high-pressure regulating solenoid valve, a low-pressure regulating solenoid valve and pipeline pressure to regulate the pressure of the mixed bed tank, and can adjust the pressure of the mixed bed tank to be consistent with the pipeline before the pneumatic valve is actuated, so as to ensure that the pressure on both sides of the valve plate is the same when the valve is actuated, and the cylinder can perform the switching action without accumulating pressure when the valve plate is opened, so that the valve plate moves at a uniform speed, the valve switch is smoother, the generation of valve opening water hammer is reduced, pipeline vibration is avoided, and the risk of pipeline rupture during system operation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a mixed bed regeneration device with pressure regulation according to the utility model. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with an embodiment, but the present invention is not limited to the embodiment. Any similar structure and similar changes of the present invention should be included in the protection scope of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and is not a limitation on the technical solution of the present invention.

[0014] like Figure 1 As shown, a mixed bed regeneration device with pressure regulation of the utility model comprises a first mixed bed, a third mixed bed, a water inlet 101, a regeneration water inlet 102, an alkali inlet 103, a nitrogen inlet 104, a water production inlet 105, a circulation inlet 106, a pressure drain outlet 107, and a gravity drain outlet 108;

[0015] The first mixed bed includes a first mixed bed tank 20, a first water inlet pneumatic valve 201, a first high-pressure regulating solenoid valve 202, a first forward wash pneumatic valve 203, a first backwash pneumatic valve 204, a first forward wash drainage pneumatic valve 205, a first nitrogen inlet pneumatic valve 206, a first circulation pneumatic valve 207, a first water production pneumatic valve 208, a first exhaust pneumatic valve 209, a first alkali inlet pneumatic valve 2010, a first middle exhaust pneumatic valve 2011, a first low-pressure regulating solenoid valve 2012, a first backwash drainage pneumatic valve 2013, a first pressure transmitter 40, and a first resistivity meter 50.

[0016] The water inlet 101 is connected to the first water inlet pneumatic valve 201 and the first mixed bed tank 20 through a pipeline, the first mixed bed tank 20 is connected to the water production port 105 through a pipeline and a first water production pneumatic valve 208, and the outlet of the first mixed bed tank 20 is provided with a first resistivity meter 50; the inlet of the first mixed bed tank 20 is connected to the water inlet 101 through a first high-pressure regulating solenoid valve 202, and the inlet of the first mixed bed tank 20 is provided with a first pressure transmitter 40, and the outlet of the first mixed bed tank 20 is also connected to the gravity drain port 108 through a pipeline and a first low-pressure regulating solenoid valve 2012; the outlet of the first mixed bed tank 20 is connected to the regeneration water inlet 102 through a pipeline and a first backwashing pneumatic valve 204, and the inlet of the first mixed bed tank 20 is connected to the gravity drain port 108 through a pipeline and a first backwashing pneumatic valve 20 13 is connected to the pressure drain port 107; the first mixed bed tank body 20 is connected to the gravity drain port 108 through a pipeline and a first exhaust pneumatic valve 209, and the first mixed bed tank body 20 is connected to the gravity drain port 108 through a pipeline and a first middle exhaust pneumatic valve 2011; the first mixed bed tank body 20 is connected to the alkali inlet 103 through a pipeline and a first alkali inlet pneumatic valve 2010; the first mixed bed tank body 20 is connected to the nitrogen inlet 104 through a pipeline and a first nitrogen inlet pneumatic valve 206; the first mixed bed tank body 20 is connected to the regeneration water inlet 102 through a pipeline and a first forward washing pneumatic valve 203, and the first mixed bed tank body 20 is connected to the pressure drain port 107 through a pipeline and a first drainage pneumatic valve 205; the first mixed bed tank body 20 is connected to the circulation port 106 through a pipeline and a first circulation pneumatic valve 207.

[0017] The third mixed bed includes a third mixed bed tank 22, a third water inlet pneumatic valve 221, a third high-pressure regulating solenoid valve 222, a third forward wash pneumatic valve 223, a third backwash pneumatic valve 224, a third forward wash drainage pneumatic valve 225, a third nitrogen inlet pneumatic valve 226, a third circulation pneumatic valve 227, a third water production pneumatic valve 228, a third exhaust pneumatic valve 229, a third alkali inlet pneumatic valve 2210, a third middle exhaust pneumatic valve 2211, a third low-pressure regulating solenoid valve 2212, a third backwash drainage pneumatic valve 2213, a third pressure transmitter 42, and a third resistivity meter 52.

[0018] The water inlet 101 is connected to the third water inlet pneumatic valve 221 and the third mixed bed tank 22 through a pipeline, the third mixed bed tank 22 is connected to the water production port 105 through a pipeline and a third water production pneumatic valve 228, and the outlet of the third mixed bed tank 22 is provided with a third resistivity meter 52; the inlet of the third mixed bed tank 22 is connected to the water inlet 101 through a third high-pressure regulating solenoid valve 222, and the inlet of the third mixed bed tank 22 is provided with a third pressure transmitter 42, and the outlet of the third mixed bed tank 22 is also connected to the gravity drain port 108 through a pipeline and a third low-pressure regulating solenoid valve 2212; the outlet of the third mixed bed tank 22 is connected to the regeneration water inlet 102 through a pipeline and a third backwashing pneumatic valve 224, and the inlet of the third mixed bed tank 22 is connected to the third backwashing drainage pneumatic valve 22 13 is connected to the pressure drain port 107; the third mixed bed tank body 22 is connected to the gravity drain port 108 through a pipeline and a third exhaust pneumatic valve 229, and the third mixed bed tank body 22 is connected to the gravity drain port 108 through a pipeline and a third middle exhaust pneumatic valve 2211; the third mixed bed tank body 22 is connected to the alkali inlet 103 through a pipeline and a third alkali inlet pneumatic valve 2210; the third mixed bed tank body 22 is connected to the nitrogen inlet 104 through a pipeline and a third nitrogen inlet pneumatic valve 226; the third mixed bed tank body 22 is connected to the regeneration water inlet 102 through a pipeline and a third forward washing pneumatic valve 223, and the third mixed bed tank body 22 is connected to the pressure drain port 107 through a pipeline and a third drainage pneumatic valve 225; the third mixed bed tank body 22 is connected to the circulation port 106 through a pipeline and a third circulation pneumatic valve 227.

[0019] Furthermore, it also includes a second mixed bed, which includes a second mixed bed tank body 21, a second water inlet pneumatic valve 211, a second high-pressure regulating solenoid valve 212, a second forward wash pneumatic valve 213, a second backwash pneumatic valve 214, a second forward wash drainage pneumatic valve 215, a second nitrogen inlet pneumatic valve 216, a second circulation pneumatic valve 217, a second water production pneumatic valve 218, a second exhaust pneumatic valve 219, a second alkali inlet pneumatic valve 2110, a second middle exhaust pneumatic valve 2111, a second low-pressure regulating solenoid valve 2112, a second backwash drainage pneumatic valve 2113, a second pressure transmitter 41, and a second resistivity meter 51.

[0020] The water inlet 101 is connected to the second mixed bed tank 21 through a pipeline and a second water inlet pneumatic valve 211, the second mixed bed tank 21 is connected to the water production port 105 through a pipeline and a second water production pneumatic valve 218, and a second resistivity meter 51 is provided at the outlet of the second mixed bed tank 21; the inlet of the second mixed bed tank 21 is connected to the water inlet 101 through a second high-pressure regulating solenoid valve 212, the inlet of the second mixed bed tank 21 is provided with a second pressure transmitter 41, and the outlet of the second mixed bed tank 21 is also connected to the gravity drain port 108 through a pipeline and a second low-pressure regulating solenoid valve 2112; the outlet of the second mixed bed tank 21 is connected to the regeneration water inlet 102 through a pipeline and a second backwashing pneumatic valve 214, and the inlet of the second mixed bed tank 21 is connected to the second backwashing drainage pneumatic valve 21 13 is connected to the pressure drain port 107; the second mixed bed tank body 21 is connected to the gravity drain port 108 through a pipeline and a second exhaust pneumatic valve 219, and the second mixed bed tank body 21 is connected to the gravity drain port 108 through a pipeline and a second middle exhaust pneumatic valve 2111; the second mixed bed tank body 21 is connected to the alkali inlet 103 through a pipeline and a second alkali inlet pneumatic valve 2110; the second mixed bed tank body 21 is connected to the nitrogen inlet 104 through a pipeline and a second nitrogen inlet pneumatic valve 216; the second mixed bed tank body 21 is connected to the regeneration water inlet 102 through a pipeline and a second forward washing pneumatic valve 213, and the second mixed bed tank body 21 is connected to the pressure drain port 107 through a pipeline and a second drainage pneumatic valve 215; the second mixed bed tank body 21 is connected to the circulation port 106 through a pipeline and a second circulation pneumatic valve 217.

[0021] Specifically, the mixed bed tank, pneumatic valve, solenoid valve, pressure transmitter, resistivity meter, etc. in this embodiment all adopt well-known solutions in the prior art, which are well known to those skilled in the art and will not be described in detail here.

[0022] The working principle of this embodiment:

[0023] The utility model discloses a mixed bed regeneration device with pressure regulation, which is composed of multiple groups of mixed bed tank bodies, each group of mixed bed tank bodies includes multiple groups of pneumatic valves, high-pressure regulating solenoid valves, low-pressure regulating solenoid valves, and pressure transmitters; the pressure of the mixed bed spare sleeve is increased before it is put into operation, so that the pneumatic valve can be quickly actuated, which is one of the purposes of the utility model; the pressure is reduced before the mixed bed is regenerated, so that the pneumatic valve can be quickly actuated, which is one of the purposes of the utility model; before the pneumatic valve is opened, the pressure on both sides of the valve plate is the same, so as to reduce the water hammer caused by valve opening, which is one of the purposes of the utility model.

[0024] The first mixed bed tank 20, the second mixed bed tank 21, and the third mixed bed tank 22 are operated in a two-in-one mode. The first mixed bed tank 20 and the second mixed bed tank 21 are initially set to operate, and the third mixed bed tank 22 is set to be on standby. Raw water enters the operating mixed bed from the water inlet 101, the first water inlet pneumatic valve 201, the second water inlet pneumatic valve 211, the first water production pneumatic valve 208, and the second water production pneumatic valve 218 are opened, and other valves are closed. After being processed, the raw water enters the subsequent equipment from the water production port 105, and all valves of the standby third mixed bed tank 22 are closed. If the reading of the first resistivity meter 50 is lower than 10MΩcm or the operating time exceeds the set value, it is determined that the first mixed bed tank 20 has failed, and the standby third mixed bed tank 22 opens the first water production pneumatic valve 218. The three high-pressure regulating solenoid valves 222 increase the pressure. When the value of the third pressure transmitter 42 is the same as that of the first pressure transmitter 40 and the second pressure transmitter 41, the pressure increase is completed, the third high-pressure regulating solenoid valve 222 is closed, the third water inlet pneumatic valve 221 and the third water production pneumatic valve 228 are opened, and the third mixed bed tank 22 is switched to operation. The failed first mixed bed tank 20 closes the first water inlet pneumatic valve 201, and the first water production pneumatic valve 208 is cut out to wait for regeneration; before the first mixed bed tank 20 is regenerated, the first low-pressure regulating solenoid valve 2012 is opened to reduce the pressure. When the value of the first pressure transmitter 40 is lower than 1 bar, the pressure reduction is completed, and the first low-pressure regulating solenoid valve 2012 is closed; the first mixed bed tank 20 enters The regeneration procedure first opens the first backwash pneumatic valve 204 and the first backwash drainage pneumatic valve 2013, and the anion and yang resins are floated by the regeneration water and then sink by gravity, and the density difference is used to stratify the anion and yang resins. After the stratification is completed, the first backwash pneumatic valve 204 and the first backwash drainage pneumatic valve 2013 are closed; the first exhaust pneumatic valve 209 and the first middle exhaust pneumatic valve 2011 are opened to reduce the internal liquid level of the first mixed bed tank 20 to 300mm above the resin layer, and then the first exhaust pneumatic valve 209 and the first middle exhaust pneumatic valve 2011 are closed; the first backwash pneumatic valve 204, the first alkali inlet pneumatic valve 2010, and the first middle exhaust pneumatic valve 2011 are opened, and acid and alkali are injected at the same time to contact the anion and yang resins respectively, so that the resins are regenerated. , the acid and alkali regeneration reagents are discharged from the first middle exhaust pneumatic valve 2011 at the same time. After the regeneration is completed, the first backwash pneumatic valve 204, the first alkali inlet pneumatic valve 2010, and the first middle exhaust pneumatic valve 2011 are closed; the first exhaust pneumatic valve 209 and the first nitrogen inlet pneumatic valve 206 are opened, and the positive and negative resins are remixed by nitrogen stirring. After the stirring is completed, the first exhaust pneumatic valve 209 and the first nitrogen inlet pneumatic valve 206 are closed; the first forward wash pneumatic valve 203 and the first drainage pneumatic valve 205 are opened, and the resin is rinsed with regenerated water, and the rinse water is discharged to the wastewater system. When the reading of the first resistivity meter 50 is higher than 1MΩcm, the flushing is completed, and the first forward wash pneumatic valve 203 and the first drainage pneumatic valve 205 are closed;Open the first forward wash pneumatic valve 203 and the first circulation pneumatic valve 207, use the regenerated water to circulate and flush the resin, and the flushing water returns to the regeneration water tank. When the reading of the first resistivity meter 50 is higher than 10MΩcm, the flushing is completed, and the first forward wash pneumatic valve 203 and the first circulation pneumatic valve 207 are closed. The first mixed bed tank 20 completes regeneration and switches to the standby state. ;

[0025] It can be seen from the above implementation process that the utility model has the following advantages:

[0026] 1. It is equipped with a high-pressure regulating solenoid valve, a low-pressure regulating solenoid valve and a pressure transmitter. When multiple mixed beds are running at the same time, the pressure in the mixed bed tank can be adjusted before the mixed bed state is switched. The pressure on both sides of the valve plate is the same before the relevant pneumatic valve is actuated, so that the speed of the valve plate is uniform and water hammer phenomenon is avoided;

[0027] 2. When the resin is regenerated, the acid and alkali reagents are discharged at the same time, making the discharged wastewater close to neutral, reducing the reagent consumption of the subsequent wastewater treatment system;

[0028] 3. Use the resistivity meter to monitor the water quality in the tank in real time during the regeneration step, which can accurately switch the steps, reduce water consumption and reduce operating costs.

[0029] The mixed bed regeneration device of the utility model comprises a plurality of mixed bed tank bodies, each of which comprises a plurality of pneumatic valves, high-pressure regulating solenoid valves, low-pressure regulating solenoid valves, pressure transmitters and resistivity meters. During normal operation, raw water enters the mixed bed tank body through a high-pressure pipeline. At this time, the water inlet pneumatic valve and the water production pneumatic valve are opened, and other pneumatic valves are closed. The tank body is in a high-pressure state, and all the pneumatic valves of the standby mixed bed are closed and in a low-pressure state. When the resin of the running mixed bed fails, it is necessary to switch. The standby mixed bed first opens the high-pressure regulating solenoid valve to increase the tank body pressure to a high-pressure state, and then opens the standby mixed bed water inlet pneumatic valve and the water production pneumatic valve to put them into operation. The failed mixed bed first closes the water inlet pneumatic valve and the water production pneumatic valve to enter a waiting regeneration state. Before regeneration, the low-pressure regulating solenoid valve is first opened to reduce the tank body pressure to normal pressure, and then the pneumatic valves are switched in sequence according to the regeneration steps to perform acid-base regeneration. After the mixed bed is regenerated, the state changes to the standby mixed bed.

[0030] The high-pressure regulating valve connects the high-pressure pipeline to the tank body, which can increase the tank pressure to the same level as the high-pressure pipeline. The low-pressure regulating valve connects the gravity drain pipe to the tank body, which can reduce the tank pressure to atmospheric pressure.

[0031] The utility model utilizes a high-pressure regulating solenoid valve, a low-pressure regulating solenoid valve and pipeline pressure to regulate the pressure of a mixed bed tank body, and can adjust the pressure of the mixed bed tank body to be consistent with the pipeline before the pneumatic valve is actuated, to ensure that the pressures on both sides of the valve plate are the same when the valve is actuated, and the cylinder can execute the switching action without accumulating pressure when the valve plate is opened, so that the valve plate can move at a uniform speed, the valve can be switched more smoothly, the generation of water hammer when the valve is opened can be reduced, pipeline vibration can be avoided, and the risk of pipeline rupture during system operation is reduced.

Claims

1. A mixed bed regeneration device with pressure regulation, characterized in that: It includes the first mixed bed, the third mixed bed, the water inlet, the regeneration water inlet, the alkali inlet, the nitrogen inlet, the water production inlet, the circulation inlet, the pressure drain outlet and the gravity drain outlet; The first mixed bed includes a first mixed bed tank, a first water inlet pneumatic valve, a first high-pressure regulating solenoid valve, a first forward wash pneumatic valve, a first backwash pneumatic valve, a first forward wash drainage pneumatic valve, a first nitrogen inlet pneumatic valve, a first circulation pneumatic valve, a first water production pneumatic valve, a first exhaust pneumatic valve, a first alkali inlet pneumatic valve, a first middle exhaust pneumatic valve, a first low-pressure regulating solenoid valve, a first backwash drainage pneumatic valve, a first pressure transmitter, and a first resistivity meter; The water inlet is connected to the first water inlet pneumatic valve and the first mixed bed tank body through a pipeline, the first mixed bed tank body is connected to the water production port through a pipeline and a first water production pneumatic valve, and the outlet of the first mixed bed tank body is provided with a first resistivity meter; the inlet of the first mixed bed tank body is connected to the water inlet through a first high-pressure regulating solenoid valve, and the inlet of the first mixed bed tank body is provided with a first pressure transmitter, and the outlet of the first mixed bed tank body is also connected to the gravity drain port through a pipeline and a first low-pressure regulating solenoid valve; the outlet of the first mixed bed tank body is connected to the regeneration water inlet through a pipeline and a first backwash pneumatic valve, and the inlet of the first mixed bed tank body is connected to the regeneration water inlet through a pipeline and a first backwash pneumatic valve. The drainage pneumatic valve is connected to the pressure drainage port; the first mixed bed tank body is connected to the gravity drainage port through a pipeline and a first exhaust pneumatic valve, and the first mixed bed tank body is connected to the gravity drainage port through a pipeline and a first middle exhaust pneumatic valve; the first mixed bed tank body is connected to the alkali inlet through a pipeline and a first alkali inlet pneumatic valve; the first mixed bed tank body is connected to the nitrogen inlet through a pipeline and a first nitrogen inlet pneumatic valve; the first mixed bed tank body is connected to the regeneration water inlet through a pipeline and a first forward washing pneumatic valve, and the first mixed bed tank body is connected to the pressure drainage port through a pipeline and a first drainage pneumatic valve; the first mixed bed tank body is connected to the circulation port through a pipeline and a first circulation pneumatic valve; The third mixed bed includes a third mixed bed tank, a third water inlet pneumatic valve, a third high-pressure regulating solenoid valve, a third forward washing pneumatic valve, a third backwashing pneumatic valve, a third forward washing drainage pneumatic valve, a third nitrogen inlet pneumatic valve, a third circulation pneumatic valve, a third water production pneumatic valve, a third exhaust pneumatic valve, a third alkali inlet pneumatic valve, a third middle exhaust pneumatic valve, a third low-pressure regulating solenoid valve, a third backwashing drainage pneumatic valve, a third pressure transmitter, and a third resistivity meter; The water inlet is connected to the third water inlet pneumatic valve and the third mixed bed tank body through a pipeline, the third mixed bed tank body is connected to the water production port through a pipeline and a third water production pneumatic valve, and the outlet of the third mixed bed tank body is provided with a third resistivity meter; the inlet of the third mixed bed tank body is connected to the water inlet through a third high-pressure regulating solenoid valve, and the inlet of the third mixed bed tank body is provided with a third pressure transmitter, and the outlet of the third mixed bed tank body is also connected to the gravity drain port through a pipeline and a third low-pressure regulating solenoid valve; the outlet of the third mixed bed tank body is connected to the regeneration water inlet through a pipeline and a third backwash pneumatic valve, and the inlet of the third mixed bed tank body is connected to the regeneration water inlet through a pipeline and a third backwash pneumatic valve. The water discharge pneumatic valve is connected to the pressure drain port; the third mixed bed tank body is connected to the gravity drain port through a pipeline and a third exhaust pneumatic valve, and the third mixed bed tank body is connected to the gravity drain port through a pipeline and a third middle exhaust pneumatic valve; the third mixed bed tank body is connected to the alkali inlet through a pipeline and a third alkali inlet pneumatic valve; the third mixed bed tank body is connected to the nitrogen inlet through a pipeline and a third nitrogen inlet pneumatic valve; the third mixed bed tank body is connected to the regeneration water inlet through a pipeline and a third forward washing pneumatic valve, and the third mixed bed tank body is connected to the pressure drain port through a pipeline and a third water discharge pneumatic valve; the third mixed bed tank body is connected to the circulation port through a pipeline and a third circulation pneumatic valve.

2. A mixed bed regeneration device with pressure regulation according to claim 1, characterized in that: It also includes a second mixed bed, which includes a second mixed bed tank, a second water inlet pneumatic valve, a second high-pressure regulating solenoid valve, a second forward wash pneumatic valve, a second backwash pneumatic valve, a second forward wash drainage pneumatic valve, a second nitrogen inlet pneumatic valve, a second circulation pneumatic valve, a second water production pneumatic valve, a second exhaust pneumatic valve, a second alkali inlet pneumatic valve, a second middle exhaust pneumatic valve, a second low-pressure regulating solenoid valve, a second backwash drainage pneumatic valve, a second pressure transmitter, and a second resistivity meter; The water inlet is connected to the second water inlet pneumatic valve and the second mixed bed tank body through a pipeline, the second mixed bed tank body is connected to the water production port through a pipeline and a second water production pneumatic valve, and the outlet of the second mixed bed tank body is provided with a second resistivity meter; the inlet of the second mixed bed tank body is connected to the water inlet through a second high-pressure regulating solenoid valve, and the inlet of the second mixed bed tank body is provided with a second pressure transmitter, and the outlet of the second mixed bed tank body is also connected to the gravity drain port through a pipeline and a second low-pressure regulating solenoid valve; the outlet of the second mixed bed tank body is connected to the regeneration water inlet through a pipeline and a second backwash pneumatic valve, and the inlet of the second mixed bed tank body is connected to the second backwash pneumatic valve through a pipeline and a second backwash valve. The water discharge pneumatic valve is connected to the pressure drain port; the second mixed bed tank body is connected to the gravity drain port through a pipeline and a second air discharge pneumatic valve, and the second mixed bed tank body is connected to the gravity drain port through a pipeline and a second middle air discharge pneumatic valve; the second mixed bed tank body is connected to the alkali inlet through a pipeline and a second alkali inlet pneumatic valve; the second mixed bed tank body is connected to the nitrogen inlet through a pipeline and a second nitrogen inlet pneumatic valve; the second mixed bed tank body is connected to the regeneration water inlet through a pipeline and a second forward washing pneumatic valve, and the second mixed bed tank body is connected to the pressure drain port through a pipeline and a second water discharge pneumatic valve; the second mixed bed tank body is connected to the circulation port through a pipeline and a second circulation pneumatic valve.

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