Water treatment method with simultaneous adsorption and desorption in separate chambers

Abstract

The present invention relates to the field of water treatment technology, specifically to a water treatment method with simultaneous adsorption and desorption in separate chambers, which overcomes the problem of intermittent water discharge in existing deionized water treatment methods, and has the following process: 1) electrode plates, positive membrane plates, screen plates, negative membrane plates, screen plates, positive membrane plates and electrode plates are stacked into an adsorption assembly to form a first adsorption channel and a second adsorption channel, and a clean water outlet and a sewage outlet are respectively provided on the first and second solenoid valves, the first water inlet is connected to the first water pump, and the second water inlet is connected to the second water pump; 2) water to be treated is connected; 3) the first adsorption channel adsorbs and produces water; 4) the first adsorption channel stops adsorption and the residual clean water is discharged; 5) the first adsorption channel desorbs and discharges sewage and the second adsorption channel adsorbs and produces water; 6) the second adsorption channel stops adsorption and the residual clean water is discharged; 7) the second adsorption channel desorbs and discharges sewage and the first adsorption channel adsorbs and produces water; 8) adsorption and production of water and desorption and discharge of sewage are performed alternately.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, in particular to a water treatment method with simultaneous adsorption and desorption in separate chambers. Background Art

[0002] An effective method to remove salt ions from sewage is to use the method of electrical adsorption. The whole process has the steps of applying a forward voltage for adsorption and applying a reverse voltage for desorption. During adsorption, ions are adsorbed onto the electrode. When the ions accumulate to a certain extent, the adsorption capacity of the electrode decreases. At this time, the electrode is repaired by desorption. Clean water is produced during adsorption and sewage is discharged during desorption. The existing one-way chamber membrane capacitor electrical adsorption device has all chambers adsorbing and desorbing at the same time, and the process is carried out in different time periods on the same device. This intermittent water production method is not conducive to the stable operation of the entire device. Water storage and water delivery devices need to be added between the water outlet and the next water treatment device. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a water treatment method for adsorption and desorption that can produce water as continuously as possible, thereby overcoming the problem that the existing deionized water treatment method cannot produce water stably.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a water treatment method with simultaneous adsorption and desorption in separate chambers, which has the following process:

[0005] (1) The water treatment device is provided by stacking the first adsorption electrode plate, the first cation membrane plate, the first screen plate, the cathode membrane plate, the second screen plate, the second cation membrane plate and the second adsorption electrode plate in sequence to form an adsorption assembly, and the adsorption assembly is clamped by the water inlet and outlet cover and the sealing cover, and the first and second water inlets and the first and second water outlets are provided on the outer end surfaces of the water inlet and outlet cover;

[0006] The compartment between the first cation membrane plate and the cathode membrane plate is the first compartment, and the compartment between the cathode membrane plate and the second cation membrane plate is the second compartment. The first water inlet, the first compartment and the first water outlet are connected to form a first adsorption channel, and the second water inlet, the second compartment and the second water outlet are connected to form a second adsorption channel.

[0007] Connect the first and second water outlets to the inlet of the first solenoid valve and the second solenoid valve respectively, and set two inlet ports, a clean water outlet and a sewage outlet, on the first and second solenoid valves respectively. Connect the first water inlet to the first water pump and the second water inlet to the second water pump;

[0008] (2) Connection of water to be treated: connect the raw water to the first water pump and the second water pump;

[0009] (3) The adsorption and water production of the first adsorption channel applies a negative voltage and a positive voltage to the first and second adsorption electrodes respectively, the first solenoid valve connects the first water outlet and the clean water outlet, the second solenoid valve closes the second water outlet, and the first water pump is started to realize the adsorption and water production of the first adsorption channel;

[0010] (4) Stopping adsorption of the first adsorption channel and discharging of residual clean water The adsorption water production of the first adsorption channel continues until the set adsorption time. After the first and second adsorption electrodes are powered off but the first adsorption channel continues to discharge water for 5 to 10 seconds, the first solenoid valve closes the first water outlet and closes the first adsorption channel;

[0011] (5) After the desorption and drainage of the first adsorption channel and the adsorption and water production electrodes of the second adsorption channel are powered off for 5 to 10 seconds, the second water pump is started, and a positive voltage and a negative voltage are applied to the first adsorption electrode plate and the second adsorption electrode plate respectively. After applying the voltage for 10 to 30 seconds, the second solenoid valve connects the second water outlet with the clean water outlet to achieve adsorption and water production in the second adsorption channel. At the same time, after applying the voltage for 10 to 30 seconds, the first solenoid valve connects the first water outlet with the sewage outlet to achieve desorption and drainage of the first adsorption channel. After desorption reaches the set time, the first solenoid valve closes the first water outlet; the set desorption time is less than the set adsorption time;

[0012] (6) Stopping adsorption of the second adsorption channel and discharging of residual clean water The second adsorption channel adsorbs and produces water until the set adsorption time. After the first and second adsorption electrodes are powered off but the second adsorption channel continues to discharge water for 5 to 10 seconds, the second solenoid valve closes the second water outlet and closes the second adsorption channel;

[0013] (7) After the desorption and drainage of the second adsorption channel and the adsorption and water production of the first adsorption channel are powered off for 5 to 10 seconds, a negative voltage and a positive voltage are applied to the first adsorption electrode plate and the second adsorption electrode plate respectively. After 10 to 30 seconds of voltage application, the first solenoid valve connects the first water outlet with the clean water outlet to achieve adsorption and water production in the first adsorption channel. At the same time, after 10 to 30 seconds of voltage application, the second solenoid valve connects the second water outlet with the sewage outlet to achieve desorption and drainage of the second adsorption channel. After desorption reaches the set time, the second solenoid valve closes the second water outlet;

[0014] (8) Adsorption and water production and desorption and sewage discharge are carried out alternately. The first water pump and the second water pump keep working and cycle through the processes (4) to (7).

[0015] Specifically, in the process (1), at least two adsorption components are clamped between the water inlet and outlet cover and the sealing cover.

[0016] Specifically, in order to avoid the need for insulation between adsorption components, in the process (1), adjacent adsorption electrodes between each adsorption component are electrically connected and are applied with the same direction voltage.

[0017] Specifically, in the process (1), the first partition plate and the second partition plate respectively have an outer plate body and an inner grid portion, the thickness of the grid portion is less than the thickness of the plate body, the grid portion of the first partition plate is the first compartment, and the grid portion of the second partition plate is the second compartment.

[0018] Specifically, the method for forming the first and second adsorption channels in the process (1) is to provide two upper and lower rows of water holes on each plate of the adsorption assembly, and to provide two upper and lower water grooves each connected to the first water inlet, the second water inlet, the first water outlet and the second water outlet on the inner end surface of the water inlet and outlet cover. The holes arranged at odd-numbered positions in each row of water holes are odd-numbered holes, and the holes arranged at even-numbered positions are even-numbered holes. The odd-numbered holes and the even-numbered holes are respectively connected to a corresponding water groove. The first compartment and the second compartment are connected to different water grooves at the top by the water holes and are also connected to different water grooves at the bottom by the water holes.

[0019] Specifically, the adsorption time set for the first adsorption channel in process (4) is 15 to 25 minutes, and the adsorption time set for the second adsorption channel in process (6) is 15 to 25 minutes.

[0020] Specifically, the desorption time set for the first adsorption channel in the process (5) is 5 to 15 minutes, and the desorption time set for the second adsorption channel in the process (7) is 5 to 15 minutes.

[0021] In order to save energy and reasonably select the ratio of produced water to total water intake, that is, to determine the appropriate water yield, the motors of the first water pump and the second water pump in process (1) use variable frequency motors, and processes (3) to (8) include steps of adjusting the speed of the first water pump motor and / or the second water pump motor to adjust the water output of the water pump.

[0022] The beneficial effects of the present invention are as follows: the present invention arranges the electric adsorption device into two chambers, and the water outlet of the two chambers is controlled by an electromagnetic valve and alternately connected to the first water pump and the second water pump. The continuous operation of the water pump forms an electric adsorption method similar to a pendulum-like water production and pendulum-like sewage discharge that are simultaneously performed. The first water pump is close to continuously producing clean water. The water treatment method of the electric adsorption is a method that can produce water relatively stably and continuously, and can balance the energy consumption and water yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded view of the adsorption assembly used in the present invention;

[0024] Figure 2 Schematic diagram of forming a first adsorption channel and a second adsorption channel on the adsorption component of the present invention;

[0025] Figure 3It is a schematic diagram of the adsorption components after being superimposed in the present invention;

[0026] Figure 4 It is a schematic diagram showing the water trough and water hole in the present invention;

[0027] Figure 5 It is a schematic diagram of the water treatment process of the present invention.

[0028] In the figure: 1. first adsorption electrode plate, 2. first cation membrane plate, 3. first screen plate, 4. anion membrane plate, 5. second screen plate, 6. second cation membrane plate, 7. second adsorption electrode plate, 8. water inlet and outlet cover, 8-1. first and second water inlets, 8-2. first and second water outlets, 9. sealing cover, 10. first compartment, 11. second compartment, 12. first solenoid valve, 13. second solenoid valve, 14. first water pump, 15. second water pump, 16. water hole, 17. water trough, 18. collecting plate, 19. conductive plate, 100. adsorption component, 200. first adsorption channel, 300. second adsorption channel. DETAILED DESCRIPTION

[0029] The present invention further illustrates the technical features with the following embodiments in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following embodiments.

[0030] A water treatment method with simultaneous adsorption and desorption in separate chambers has the following process:

[0031] (1) The installation of water treatment equipment is as shown in the attached Figure 1 As shown, the first adsorption electrode plate 1, the first cation membrane plate 2, the first screen plate 3, the cathode membrane plate 4, the second screen plate 5, the second cation membrane plate 6 and the second adsorption electrode plate 7 are sequentially stacked to form an adsorption assembly 100. The adsorption assembly 100 also includes a current collecting plate 18 outside the electrode plate and a conductive plate 19 outside the current collecting plate 18. The adsorption assembly 100 is clamped by the water inlet and outlet cover 8 and the sealing cover 9, and at least two adsorption assemblies 100 are clamped between the water inlet and outlet cover 8 and the sealing cover 9. The adjacent adsorption electrodes between each adsorption assembly 100 are electrically connected and are applied with the same direction voltage when voltage is applied. As shown in the attached Figure 3 As shown, the first and second water inlets 8-1 and the first and second water outlets 8-2 are provided on the outer end surface of the water inlet and outlet cover 8;

[0032] As attached Figure 2 Taking an adsorption assembly 100 as an example, the compartment between the first positive membrane plate 2 and the negative membrane plate 4 is the first compartment 10, and the compartment between the negative membrane plate 4 and the second positive membrane plate 6 is the second compartment 11. The first water inlet, the first compartment 10 and the first water outlet are connected to form a first adsorption channel 200, and the second water inlet, the second compartment 11 and the second water outlet are connected to form a second adsorption channel 300. Figure 4As shown, the method for forming the first and second adsorption channels is to provide two upper and lower rows of water holes 16 on each plate of the adsorption assembly 100, and to provide two upper and lower water grooves 17 on the inner end surface of the water inlet and outlet cover 8, each of which is connected to the first water inlet, the second water inlet, the first water outlet, and the second water outlet. In each row of water holes 16, the holes arranged at odd-numbered positions are odd-numbered holes, and the holes arranged at even-numbered positions are even-numbered holes. The odd-numbered holes and the even-numbered holes are respectively connected to one water groove 17. The first compartment 10 and the second compartment 11 are connected to different water grooves 17 at the top by the water holes 16, and are also connected to different water grooves 17 at the bottom by the water holes 16.

[0033] In addition, the first partition plate 3 and the second partition plate 5 respectively have an outer circle plate body and an inner mesh part, the thickness of the mesh part is less than the thickness of the plate body, the mesh part of the first partition plate 3 is the first compartment 10, and the mesh part of the second partition plate 5 is the second compartment 11. The first partition plate 3 and the second partition plate 5 are PVC, PP or PC boards.

[0034] Combined with attachment Figure 5 , connect the first and second water outlets 8-2 to the inlets of the first solenoid valve 12 and the second solenoid valve 13 respectively, set two inlets for clean water outlet and sewage outlet on the first and second solenoid valves respectively, connect the first water inlet to the first water pump 14, and connect the second water inlet to the second water pump 15;

[0035] (2) The raw water to be treated is connected to the first water pump 14 and the second water pump 15. The raw water can also be water treated by the previous water treatment method;

[0036] (3) The first adsorption channel produces water by adsorption. A negative voltage and a positive voltage are applied to the first and second adsorption electrodes, respectively. The first solenoid valve 12 connects the first water outlet with the clean water outlet, the second solenoid valve 13 closes the second water outlet, and the first water pump 14 is started to realize the adsorption of water by the first adsorption channel 200. The steps in this process are not limited to being performed in the order described;

[0037] (4) Stopping adsorption of the first adsorption channel and discharging of residual clean water The adsorption and water production of the first adsorption channel 200 continues until the set adsorption time. The first and second adsorption electrodes are powered off, but the first adsorption channel 200 continues to discharge water for 5 to 10 seconds. This is to improve the utilization rate of water and completely discharge the treated water in the pipeline and chamber. After that, the first solenoid valve 12 closes the first water outlet and closes the first adsorption channel 200.

[0038] (5) After the first adsorption channel desorption and sewage discharge and the second adsorption channel adsorption and water production electrodes are powered off for 5 to 10 seconds, the second water pump 15 is started, and a positive voltage and a negative voltage are applied to the first adsorption electrode plate 1 and the second adsorption electrode plate 7 respectively. After applying the voltage for 10 to 30 seconds (this time is the start time of desorption of the first adsorption channel 200 and the start time of adsorption of the second adsorption channel 300), the second solenoid valve 13 connects the second water outlet with the clean water outlet to achieve adsorption and water production of the second adsorption channel 300. At the same time as the voltage is applied for 10 to 30 seconds, the first solenoid valve 12 connects the first water outlet with the sewage outlet to achieve desorption and sewage discharge of the first adsorption channel 200. After desorption reaches the set time, the first solenoid valve 12 closes the first water outlet; the set desorption time is less than the set adsorption time;

[0039] (6) Stopping adsorption of the second adsorption channel and discharge of residual clean water The second adsorption channel 300 continues to adsorb and produce water until the set adsorption time. After the first and second adsorption electrodes are powered off but the second adsorption channel 300 continues to discharge water for 5 to 10 seconds, the second solenoid valve 13 closes the second water outlet and closes the second adsorption channel 300;

[0040] (7) After the desorption and drainage of the second adsorption channel and the adsorption and water production of the first adsorption channel are powered off for 5 to 10 seconds, a negative voltage and a positive voltage are applied to the first adsorption electrode plate 1 and the second adsorption electrode plate 7, respectively. After applying the voltage for 10 to 30 seconds (this time is the start time of desorption of the second adsorption channel 300 and the start time of adsorption of the first adsorption channel 200), the first solenoid valve 12 connects the first water outlet with the clean water outlet to achieve adsorption and water production of the first adsorption channel 200. At the same time as the voltage is applied for 10 to 30 seconds, the second solenoid valve 13 connects the second water outlet with the sewage outlet to achieve desorption and drainage of the second adsorption channel 300. After desorption reaches the set time, the second solenoid valve 13 closes the second water outlet;

[0041] (8) Adsorption and water production and desorption and sewage discharge are performed alternately. The first water pump 14 and the second water pump 15 keep working and circulate the process from (4) to (7).

[0042] The adsorption time set in process (4) is 15 to 25 minutes, and the desorption time set in process (5) is 5 to 15 minutes. The specific adsorption and desorption times are determined according to the performance parameter design of each component in the device.

[0043] The first solenoid valve 12 and the second solenoid valve 13 described in the present invention are not necessarily two separate solenoid valves as shown in the example, but may also be solenoid valves integrated in one valve body.

[0044] The motors of the first water pump 14 and the second water pump 15 use variable frequency motors. Processes (3) to (8) include steps of adjusting the speed of the first water pump motor and / or the second water pump motor to adjust the water output of the water pump. In this way, different speeds can be matched to the adsorption and desorption water flows, making the operation of the entire water treatment device more economical and reasonable.

[0045] In the method of the present invention, the two chambers in the two channels are composed of two positive membrane plates sandwiching one negative membrane plate instead of using two negative membrane plates sandwiching one positive membrane plate, that is, each adsorption component has two positive membrane plates and one negative membrane plate. Such an adsorption component has better adsorption capacity and can increase the water treatment capacity by nearly 30% compared with two negative membrane plates sandwiching one positive membrane plate. The specific reason is unknown. Theoretically, these two forms should have the same water treatment capacity. The inventor believes that it may be related to the different sizes of positive and negative electrons.

[0046] Obviously, the water treatment method of simultaneous absorption and desorption in separate chambers of the present invention is to set two chambers in the same device, and the two chambers are respectively in the adsorption state and the desorption state. The two states in the two chambers have a time period that is carried out simultaneously, but their respective durations are not necessarily the same, and the duration of the desorption state is shorter than the duration of the adsorption state.

[0047] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A water treatment method with simultaneous adsorption and desorption in separate chambers, characterized by: The process is as follows: (1) The water treatment device is provided by stacking the first adsorption electrode plate, the first cation membrane plate, the first screen plate, the cathode membrane plate, the second screen plate, the second cation membrane plate and the second adsorption electrode plate in sequence to form an adsorption assembly, and the adsorption assembly is clamped by the water inlet and outlet cover and the sealing cover, and the first and second water inlets and the first and second water outlets are provided on the outer end surfaces of the water inlet and outlet cover; The compartment between the first cation membrane plate and the cathode membrane plate is the first compartment, and the compartment between the cathode membrane plate and the second cation membrane plate is the second compartment. The first water inlet, the first compartment and the first water outlet are connected to form a first adsorption channel, and the second water inlet, the second compartment and the second water outlet are connected to form a second adsorption channel. Connect the first and second water outlets to the inlet of the first solenoid valve and the second solenoid valve respectively, and set two inlet ports, a clean water outlet and a sewage outlet, on the first and second solenoid valves respectively. Connect the first water inlet to the first water pump and the second water inlet to the second water pump; (2) Connection of water to be treated: connect the raw water to the first water pump and the second water pump; (3) The adsorption and water production of the first adsorption channel applies a negative voltage and a positive voltage to the first and second adsorption electrodes respectively, the first solenoid valve connects the first water outlet and the clean water outlet, the second solenoid valve closes the second water outlet, and the first water pump is started to realize the adsorption and water production of the first adsorption channel; (4) Stopping adsorption of the first adsorption channel and discharging of residual clean water The adsorption water production of the first adsorption channel continues until the set adsorption time. After the first and second adsorption electrodes are powered off but the first adsorption channel continues to discharge water for 5 to 10 seconds, the first solenoid valve closes the first water outlet and closes the first adsorption channel; (5) After the desorption and drainage of the first adsorption channel and the adsorption and water production electrodes of the second adsorption channel are powered off for 5 to 10 seconds, the second water pump is started, and a positive voltage and a negative voltage are applied to the first adsorption electrode plate and the second adsorption electrode plate respectively. After applying the voltage for 10 to 30 seconds, the second solenoid valve connects the second water outlet with the clean water outlet to achieve adsorption and water production in the second adsorption channel. At the same time, after applying the voltage for 10 to 30 seconds, the first solenoid valve connects the first water outlet with the sewage outlet to achieve desorption and drainage of the first adsorption channel. After desorption reaches the set time, the first solenoid valve closes the first water outlet; the set desorption time is less than the set adsorption time; (6) Stopping adsorption of the second adsorption channel and discharging of residual clean water The second adsorption channel adsorbs and produces water until the set adsorption time. After the first and second adsorption electrodes are powered off but the second adsorption channel continues to discharge water for 5 to 10 seconds, the second solenoid valve closes the second water outlet and closes the second adsorption channel; (7) After the desorption and drainage of the second adsorption channel and the adsorption and water production of the first adsorption channel are powered off for 5 to 10 seconds, a negative voltage and a positive voltage are applied to the first adsorption electrode plate and the second adsorption electrode plate respectively. After 10 to 30 seconds of voltage application, the first solenoid valve connects the first water outlet with the clean water outlet to achieve adsorption and water production in the first adsorption channel. At the same time, after 10 to 30 seconds of voltage application, the second solenoid valve connects the second water outlet with the sewage outlet to achieve desorption and drainage of the second adsorption channel. After desorption reaches the set time, the second solenoid valve closes the second water outlet; (8) Adsorption and water production and desorption and sewage discharge are carried out alternately. The first water pump and the second water pump keep working and cycle through the processes (4) to (7).

2. The water treatment method of simultaneous adsorption and desorption in separate chambers according to claim 1, characterized in that: In the process (1), at least two adsorption components are clamped between the water inlet and outlet cover and the sealing cover.

3. The water treatment method of claim 2, wherein: In the process (1), adjacent adsorption electrodes of each adsorption component are electrically connected and are applied with the same direction voltage.

4. The water treatment method of claim 1, wherein: In the process (1), the first partition plate and the second partition plate respectively have an outer plate body and an inner mesh portion, the thickness of the mesh portion is less than the thickness of the plate body, the mesh portion of the first partition plate is the first compartment, and the mesh portion of the second partition plate is the second compartment.

5. The water treatment method of claim 1, wherein: The method for forming the first and second adsorption channels in the process (1) is as follows: two rows of water holes are provided on each plate of the adsorption assembly, and two upper and lower water grooves are provided on the inner end surface of the water inlet and outlet cover, each of which is connected to the first water inlet, the second water inlet, the first water outlet and the second water outlet. The holes arranged at odd positions in each row of water holes are odd holes, and the holes arranged at even positions are even holes. The odd holes and the even holes are respectively connected to a corresponding water groove. The first compartment and the second compartment are connected to different water grooves at the top by the water holes and are also connected to different water grooves at the bottom by the water holes.

6. The water treatment method of claim 1, wherein: In the process (1), the first partition board and the second partition board are PVC, PP or PC boards.

7. The water treatment method of claim 1, wherein: The adsorption time set for the first adsorption channel in the process (4) is 15 to 25 minutes, and the adsorption time set for the second adsorption channel in the process (6) is 15 to 25 minutes.

8. The water treatment method of claim 1, wherein: The desorption time set for the first adsorption channel in the process (5) is 5 to 15 minutes, and the desorption time set for the second adsorption channel in the process (7) is 5 to 15 minutes.

9. The water treatment method of claim 1, wherein: In the process (1), the motors of the first water pump and the second water pump use variable frequency motors, and in the processes (3) to (8), there are steps of adjusting the speed of the first water pump motor and / or the second water pump motor to adjust the water output of the water pump.

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