Automatic control system of membrane deoxidizing device

Abstract

The invention provides an automatic control system of a membrane deoxidizing device, which can timely treat and ensure continuous and normal operation of the device when internal equipment of the membrane deoxidizing device breaks down, and can timely adjust the device when dissolved oxygen at an outlet of the membrane deoxidizing device exceeds the standard to ensure that the dissolved oxygen concentration of produced water reaches the standard. The system comprises a parameter monitoring module; a central control module; the operation parameter control module comprises a nitrogen flow adjusting module, a vacuum degree adjusting module, a deoxidation membrane control module and a security filter control module; the parameter monitoring module monitors water inlet parameters, water production parameters and equipment operation parameters, the monitoring parameters obtained by the parameter monitoring module are fed back to the central control module in real time, and the central control module is responsible for processing received parameter information, analyzing the parameter information, then performing operation calculation on the analyzed data, and sending the calculated data to the central control module. And then an instruction obtained through analysis and operation is issued to a corresponding operation parameter control module.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, specifically to an automatic control system for a membrane deoxygenation device. Background Technology

[0002] In water treatment systems, dissolved oxygen needs to be pretreated, which is generally accomplished by membrane deoxygenation devices. However, existing membrane deoxygenation devices are all manually controlled, and when a fault occurs, it cannot be resolved automatically. Furthermore, when the dissolved oxygen level at the outlet of the membrane deoxygenation device exceeds the standard, it cannot be adjusted in time and requires human intervention. The entire membrane deoxygenation device requires extensive human involvement during operation, which increases labor costs and cannot ensure continuous operation of the device, thus reducing the efficiency of water treatment. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an automatic control system for a membrane deoxygenation device. This system can promptly handle malfunctions in the internal equipment of the membrane deoxygenation device, ensuring its continuous and normal operation. Simultaneously, when the dissolved oxygen at the outlet of the membrane deoxygenation device exceeds the standard, it can promptly adjust the device to ensure that the dissolved oxygen concentration of the produced water meets the standard.

[0004] An automatic control system for a membrane deoxygenation device, characterized in that it comprises: The parameter monitoring module includes an influent parameter monitoring module, a product water parameter monitoring module, and an equipment operation parameter monitoring module; Central control module; And the operating parameter control module, which includes a nitrogen flow regulation module, a vacuum regulation module, a deoxygenation membrane control module, and a security filter control module; The parameter monitoring module monitors the influent parameters, product water parameters, and equipment operating parameters. The monitoring parameters obtained by the parameter monitoring module are fed back to the central control module in real time. The central control module is responsible for processing the received parameter information, analyzing it, and then performing calculations on the analyzed data. Finally, it issues the instructions obtained from the analysis and calculations to the corresponding operating parameter control module.

[0005] Its further features are: The operating parameter control module also includes a security filter element replacement alarm module and a deoxygenation membrane cleaning alarm module. The equipment operation parameter monitoring module includes monitoring the pressure difference between the inlet and outlet of the security filter and the pressure difference between the inlet and outlet of the deoxygenation membrane. When the parameter monitoring module detects that the pressure difference between the inlet and outlet of the security filter reaches the set value, it switches to the standby security filter through the security filter control module, shutting down the previously clogged security filter. At the same time, the security filter element replacement alarm module starts working, and the system alarms to prompt the replacement of the security filter element that was switched to before. After the security filter element is replaced, the security filter element replacement alarm module is restored. When the parameter monitoring module detects that the inlet and outlet pressure difference of the deoxidation membrane reaches the set value, the deoxidation membrane control module switches to the standby deoxidation membrane to close the previously blocked deoxidation membrane. At the same time, the deoxidation membrane cleaning alarm module works, and the system alarms to prompt the deoxidation membrane to be cleaned. After the deoxidation membrane is cleaned, the deoxidation membrane cleaning alarm module is restored. The influent parameter monitoring module is used to monitor the influent flow rate and dissolved oxygen concentration of the influent, and the product water parameter monitoring module is used to monitor the product water flow rate and dissolved oxygen concentration of the product water; When the parameter monitoring module detects that the influent flow rate has increased to the set value, the deoxygenation membrane control module will activate the backup deoxygenation membrane to increase the system's processing capacity. When the system flow rate decreases, the deoxygenation membrane control module will shut down the backup deoxygenation membrane to reduce the system's processing capacity, extend the overall service life of the deoxygenation membrane, and reduce operating energy consumption. When the dissolved oxygen in the permeate increases, the nitrogen flow rate is increased by the nitrogen flow control module, and the vacuum level is increased by the vacuum level adjustment module to improve the operating effect of the deoxygenation membrane and reduce the dissolved oxygen in the permeate.

[0006] After adopting the above technical solution, water requiring dissolved oxygen reduction is fed into the membrane deoxygenation unit. The influent parameters, product water parameters, and equipment operating parameters are monitored by the parameter monitoring module. The monitoring parameters obtained by the parameter monitoring module are fed back to the central control module in real time. The central control module is responsible for processing the received parameter information, analyzing it, and then performing calculations on the analyzed data. Afterwards, the instructions obtained from the analysis and calculations are issued to the corresponding operating parameter control modules. When equipment inside the membrane deoxygenation unit malfunctions, backup equipment can be used for replacement, and alarms can be issued to clean or replace the faulty equipment to ensure the continuous normal operation of the unit. At the same time, when the dissolved oxygen at the outlet of the membrane deoxygenation unit exceeds the standard, the unit can be adjusted in a timely manner to ensure that the dissolved oxygen of the product water meets the standard. Attached Figure Description

[0007] Figure 1 This is a schematic block diagram of the system configuration of the present invention; Figure 2 This is a schematic diagram of the composition of the operating parameter control module of the system of the present invention; Figure 3 This is a schematic diagram illustrating the control configuration of the security filter by the central control module of the present invention; Figure 4 This is a schematic diagram of the control configuration of the deoxygenation membrane by the central control module of the present invention; Figure 5 This is a simplified schematic diagram of the logic control of the system of the present invention; Figure 6 A schematic diagram of a membrane deoxygenation device adapted to the invention; Figure 7 This is a schematic diagram of the structure of the membrane contactor in the membrane deoxygenation device adapted to this invention; The names corresponding to the serial numbers in the diagram are as follows: Contactor body 100, water inlet 101, water outlet 102, purge air inlet 103, purge air outlet 104; 1. In-use security filter; 2. Standby security filter; 3. Differential pressure transmitter for inlet and outlet of security filter; 4. Differential pressure transmitter for inlet and outlet of deoxygenation membrane; 5. In-use two-stage deoxygenation membrane equipment; 6. Standby two-stage deoxygenation membrane equipment; 7. Nitrogen flow regulating module; 8. Inlet water flow meter; 9. Inlet water dissolved oxygen meter; 10. Product water dissolved oxygen meter; 11. Vacuum regulating module; 12. Central control module; 13. Inlet water pipeline; 14. Horizontal inlet water pipe; 15. Product water outlet pipeline; 16. Air inlet pipeline. Detailed Implementation

[0008] An automatic control system for a membrane deoxygenation device includes a parameter monitoring module, a central control module, and an operating parameter control module. The parameter monitoring module includes an influent parameter monitoring module, a product water parameter monitoring module, and an equipment operation parameter monitoring module; the influent parameter monitoring module is used to monitor the influent flow rate and dissolved oxygen concentration of the influent, and the product water parameter monitoring module is used to monitor the product water flow rate and dissolved oxygen concentration of the product water; The equipment operation parameter monitoring module includes monitoring the pressure difference between the inlet and outlet of the security filter and the pressure difference between the inlet and outlet of the deoxygenation membrane; The operating parameter control module includes a nitrogen flow regulation module, a vacuum regulation module, a deoxygenation membrane control module, and a security filter control module; the operating parameter control module also includes a security filter element replacement alarm module and a deoxygenation membrane cleaning alarm module. The parameter monitoring module monitors the influent parameters, product water parameters, and equipment operating parameters. The monitoring parameters obtained by the parameter monitoring module are fed back to the central control module in real time. The central control module is responsible for processing the received parameter information, analyzing it, and then performing calculations on the analyzed data. Finally, it issues the instructions obtained from the analysis and calculations to the corresponding operating parameter control module.

[0009] When the parameter monitoring module detects that the pressure difference between the inlet and outlet of the security filter reaches the set value, it switches to the standby security filter through the security filter control module, shutting down the previously clogged security filter. At the same time, the security filter element replacement alarm module starts working, and the system alarms to prompt the replacement of the security filter element that was switched to before. After the security filter element is replaced, the security filter element replacement alarm module is restored. When the parameter monitoring module detects that the inlet and outlet pressure difference of the deoxidation membrane reaches the set value, the deoxidation membrane control module switches to the standby deoxidation membrane to close the previously blocked deoxidation membrane. At the same time, the deoxidation membrane cleaning alarm module works, and the system alarms to prompt the deoxidation membrane to be cleaned. After the deoxidation membrane is cleaned, the deoxidation membrane cleaning alarm module is restored. When the parameter monitoring module detects that the influent flow rate has increased to the set value, the deoxygenation membrane control module will activate the backup deoxygenation membrane to increase the system's processing capacity. When the system flow rate decreases, the deoxygenation membrane control module will shut down the backup deoxygenation membrane to reduce the system's processing capacity, extend the overall service life of the deoxygenation membrane, and reduce operating energy consumption. When the dissolved oxygen in the permeate increases, the nitrogen flow rate is increased by the nitrogen flow control module, and the vacuum level is increased by the vacuum level adjustment module to improve the operating effect of the deoxygenation membrane and reduce the dissolved oxygen in the permeate.

[0010] In specific implementation, the structure of the corresponding membrane deoxygenation device is shown in [reference needed]. Figure 6It includes an inlet pipe 13, with differential pressure transmitters 3 for the inlet and outlet of a security filter installed at both the inlet and outlet. At least two sets of security filter groups are sequentially arranged in the inlet pipe 13 along the water flow direction. Each security filter group includes one in-use security filter 1 and one standby security filter 2. The outlet of the inlet pipe 13 is connected in parallel to the inlet of two sets of two-stage deoxygenation membrane equipment via a horizontal inlet pipe 14. Each set of two-stage deoxygenation membrane equipment includes two sets of deoxygenation membrane equipment connected in series. Each deoxygenation membrane equipment includes a contactor body 100, a water inlet 101, a water outlet 102, a purge air inlet 103, and a purge air outlet 104. The two sets of two-stage deoxygenation membrane equipment constitute one normally used, in-use two-stage deoxygenation membrane equipment 5. The system includes a spare two-stage deoxygenation membrane device 6, with the outlets of both devices converging at the product water outlet pipe 15. Differential pressure transmitters 4 for the deoxygenation membrane inlet and outlet are installed on the product water outlet pipe 15 and the horizontal inlet pipe 14. Air inlet pipes 16 are connected in parallel to the air inlets of each deoxygenation membrane device, and a nitrogen flow regulating module 7 is installed on the air inlet pipe 16. The air outlets of each deoxygenation membrane device are connected in parallel to the vacuum regulating module 11 before being discharged. The membrane deoxygenation device also includes an inlet flow meter 8, an inlet dissolved oxygen meter 9, a product dissolved oxygen meter 10, and a central control module 12. The inlet flow meter 8 and the inlet dissolved oxygen meter 9 both have their sensing ports located on the inlet pipe 13, while the product dissolved oxygen meter 10 has its sensing port located on the product water outlet pipe 15.

[0011] Its working principle is as follows: Water requiring dissolved oxygen reduction is introduced into the membrane deoxygenation unit. The parameter monitoring module monitors the influent parameters, product water parameters, and equipment operating parameters. The monitoring parameters obtained by the parameter monitoring module are fed back to the central control module in real time. The central control module is responsible for processing the received parameter information, analyzing it, and then performing calculations on the analyzed data. After that, the instructions obtained from the analysis and calculations are issued to the corresponding operating parameter control modules. When a fault occurs in the internal equipment of the membrane deoxygenation unit, it can replace the backup equipment and issue an alarm to clean or replace the faulty equipment to ensure the continuous normal operation of the unit. At the same time, when the dissolved oxygen at the outlet of the membrane deoxygenation unit exceeds the standard, it can adjust the unit in a timely manner to ensure that the dissolved oxygen of the product water meets the standard.

[0012] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0013] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic control system for a membrane deoxygenation device, characterized in that, It includes: The parameter monitoring module includes an influent parameter monitoring module, a product water parameter monitoring module, and an equipment operation parameter monitoring module; Central control module; And the operating parameter control module, which includes a nitrogen flow regulation module, a vacuum regulation module, a deoxygenation membrane control module, and a security filter control module; The parameter monitoring module monitors the influent parameters, product water parameters, and equipment operating parameters. The monitoring parameters obtained by the parameter monitoring module are fed back to the central control module in real time. The central control module is responsible for processing the received parameter information, analyzing it, and then performing calculations on the analyzed data. Finally, it issues the instructions obtained from the analysis and calculations to the corresponding operating parameter control module.

2. The automatic control system for a membrane deoxygenation device according to claim 1, characterized in that: The operating parameter control module also includes a security filter element replacement alarm module and a deoxygenation membrane cleaning alarm module.

3. The automatic control system for a membrane deoxygenation device according to claim 2, characterized in that: The operating parameter control module also includes a security filter element replacement alarm module and a deoxygenation membrane cleaning alarm module.

4. The automatic control system for a membrane deoxygenation device according to claim 3, characterized in that: When the parameter monitoring module detects that the inlet and outlet pressure difference of the security filter reaches the set value, it switches to the standby security filter through the security filter control module, shutting down the previously clogged security filter. At the same time, the security filter element replacement alarm module starts working, and the system alarms, prompting the replacement of the previous security filter element. After the security filter element is replaced, the security filter element replacement alarm module is restored.

5. The automatic control system for a membrane deoxygenation device according to claim 3, characterized in that: When the parameter monitoring module detects that the inlet and outlet pressure difference of the deoxidation membrane reaches the set value, the deoxidation membrane control module switches to the standby deoxidation membrane and shuts down the previously blocked deoxidation membrane. At the same time, the deoxidation membrane cleaning alarm module works, and the system alarms to prompt the deoxidation membrane to be cleaned. After the deoxidation membrane is cleaned, the deoxidation membrane cleaning alarm module is restored.

6. The automatic control system for a membrane deoxygenation device according to claim 1, characterized in that: The influent parameter monitoring module is used to monitor the influent flow rate and dissolved oxygen concentration of the influent, while the product water parameter monitoring module is used to monitor the product water flow rate and dissolved oxygen concentration of the product water.

7. The automatic control system for a membrane deoxygenation device according to claim 6, characterized in that: When the parameter monitoring module detects that the influent flow rate has increased to the set value, it controls the deoxygenation membrane control module to put the backup deoxygenation membrane into the system, increasing the system's processing capacity. When the system flow rate decreases, it controls the deoxygenation membrane control module to shut down the backup deoxygenation membrane, reducing the system's processing capacity.

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