CN215516750U

CN215516750U - Demineralized water system

Info

Publication number: CN215516750U
Application number: CN202121607760.0U
Authority: CN
Inventors: 张振华; 于会泳; 王海强
Original assignee: Shandong Bluesky Environmental Technology Co ltd
Current assignee: Shandong Bluesky Environmental Technology Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-01-14
Anticipated expiration: 2031-07-15

Abstract

The utility model discloses a demineralized water system which comprises an ultrafiltration filtration system and a reverse osmosis filtration system, and further comprises a controller, wherein an LT liquid level meter a is arranged in a water purification tank a, an LT liquid level meter b is arranged in a water purification tank b, a flow meter a is arranged between an ultrafiltration backwashing pump and a water purification port a, a flow meter b is arranged between a mixer and a water inlet a, a metering pump a is arranged between a bactericide dosing device and the mixer a, a flow meter c is arranged between an RO water inlet pump and the mixer b, a metering pump b is arranged between a scale inhibitor dosing device and the mixer b, control ports of a raw water pump, the metering pump a, the RO water inlet pump, the ultrafiltration backwashing pump and the metering pump b are connected with the controller, and data ports of the LT liquid level meters a, the LT liquid level meters b, the flow meters a, the flow meters b and the flow meter c are connected with the controller. The system does not need human intervention in the operation process, avoids the loss caused by misoperation and effectively improves the automation degree of equipment.

Description

Demineralized water system

Technical Field

The utility model relates to the technical field of water treatment equipment, in particular to a demineralized water system.

Background

At present, most of known control systems of a desalting device are man-machine exchange control systems, a series of operations such as starting, stopping, regulating treatment capacity, regulating dosage and the like of the device can not be interfered by people, even employees with abundant operation experiences can be dense and sparse in the operation process, the service life of equipment is shortened if the employees are light, and the devices are stopped if the employees are seriously damaged in a large scale.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model develops the demineralized water system, the manual intervention is not needed in the operation process of the system, the loss caused by misoperation is avoided, the automation degree of equipment is effectively improved, and the yield is improved.

The technical scheme for solving the technical problem of the utility model is as follows: on one hand, the embodiment of the utility model provides a demineralized water system, which comprises an ultrafiltration filtration system and a reverse osmosis filtration system, wherein the ultrafiltration filtration system comprises a raw water pump, a mixer a, an ultrafiltration membrane water purification unit, a water purification tank a, an ultrafiltration backwashing pump, a bactericide dosing device and a concentrated water collection tank a, and the ultrafiltration membrane water purification unit is provided with a water inlet a, a water purification port a and a concentrated water port a; the reverse osmosis filtration system comprises an RO water inlet pump, a mixer b, a high-pressure pump, a reverse osmosis water purification unit, a water purification tank b, a scale inhibitor dosing device and a concentrated water collection tank b, the desalting water system further comprises a controller, an LT liquid level meter a is arranged in the water purifying tank a, an LT liquid level meter b is arranged in the water purifying tank b, a flow meter a is arranged between the ultrafiltration backwashing pump and the water purifying port a, a flow meter b is arranged between the mixer and the water inlet a, a metering pump a is arranged between the bactericide dosing device and the mixer a, a flow meter c is arranged between the RO water inlet pump and the mixer b, a metering pump b is arranged between the scale inhibitor dosing device and the mixer b, the raw water pump, the metering pump a, the RO water inlet pump, the ultrafiltration backwashing pump and a control port connection controller of the metering pump b are arranged, and the LT liquid level meter a, the LT liquid level meter b, the flow meter a, the flow meter b and a data port connection controller of the flow meter c are arranged.

Preferably, the reverse osmosis water purification unit comprises a water inlet b, a water purification port b and a concentrated water port b, the water outlet is connected with the water inlet b after sequentially passing through an RO water inlet pump, a mixer b and a high-pressure pump, the water purification port b is connected with the water purification tank b, the concentrated water port b is connected with a concentrated water collection tank b, and the scale inhibitor dosing device is connected with the mixer b.

Preferably, the reverse osmosis water purification units are connected in series to form at least two groups, each group is provided with at least two reverse osmosis water purification units in parallel, the concentrated water inlet b of the previous group of reverse osmosis water purification units is connected with the water inlet b of the next group of reverse osmosis water purification units, and the concentrated water inlet b of the last group of reverse osmosis water purification units is connected with the concentrated water collection tank b.

As optimization, the raw water pump is connected with a water inlet a after passing through a mixer, the water outlet a is connected with a water purification tank a, the concentrated water outlet a is connected with a concentrated water collection tank a, and the mixer is connected with a bactericide dosing device; the water purifying tank a is provided with a water outlet which is connected with the water purifying port a through an ultrafiltration backwashing pump.

As optimization, at least two ultrafiltration membrane water purification units are arranged in parallel.

Preferably, valves are arranged between the mixer a and the ultrafiltration membrane water purification unit, between the ultrafiltration membrane water purification unit and the water purification tank a, and between the ultrafiltration backwashing pump and the water purification port a, and control ports of the valves are connected with the controller.

Preferably, the bottoms of the water purifying tank a and the water purifying tank b are provided with sewage outlets.

Preferably, the concentrated water port b is further connected with a drain pipe, a valve is arranged on the drain pipe, a drain pipe is also arranged on a pipeline between the water purifying port b and the water purifying tank b, and a valve is arranged on the drain pipe.

The effects provided in the contents of the present invention are only the effects of the embodiments, not all the effects of the present invention, and the above technical solution has the following advantages or advantageous effects:

the design is based on that the demineralized water control system contains a pressure gauge, a pressure transmitter, a flowmeter and other instrument facilities necessary for production, a linkage control program is added, and the raw water pump is linked with an LT liquid level meter a in a water purification tank a through a controller, so that the liquid level is always constant at a set value, and the operation of an interference system caused by too many people due to unstable water consumption is avoided; when the ultrafiltration system is backwashed, the ultrafiltration backwashing pump is linked with the flowmeter a through the controller, and the constant backwashing flow is set, so that each backwashing of the ultrafiltration system is ensured to reach the flux standard designed by a manufacturer, and the running time of the ultrafiltration system is prolonged; a low liquid level alarm linkage is arranged in the controller system, and when the liquid level in the water purification tank a cannot meet the liquid level requirements of the RO water inlet pump and the ultrafiltration backwashing pump, the alarm is triggered and the RO water inlet pump and the ultrafiltration backwashing pump are closed; a metering pump a of the bactericide dosing device is linked with a flow meter b through open loop control, and the opening degree of the metering pump a is automatically controlled according to the water inflow, so that the dosing quantity is changed due to the change of the water inflow, and the phenomenon that the ultrafiltration device is stopped due to membrane fouling and blockage caused by excessive or insufficient dosing quantity in the operation process is prevented; the interlocking of the reverse osmosis filtration system is approximately consistent with the interlocking in the ultrafiltration device, the high-pressure pump is connected with an LT liquid level meter b through a controller, so that the liquid level of a water purification tank b is constant at a set numerical value, a high-low liquid level alarm interlocking is also arranged in the water purification tank b, and the high-pressure pump is stopped when the liquid level of the water purification tank b is too high, so that the safety of equipment in the reverse osmosis filtration system is ensured; a metering pump b of the scale inhibitor dosing device is linked with a flow meter c through open loop control, and the opening of the metering pump b is automatically controlled according to the water inflow, so that the dosing quantity is changed along with the change of the water inflow, the membrane fouling and blocking caused by excessive or insufficient dosing quantity in the operation process of a reverse osmosis filtration system are prevented, the device is stopped, and the scale inhibitor is continuously added. The system does not need human intervention in the operation process, avoids the loss caused by misoperation, effectively improves the automation degree of equipment and improves the yield.

Drawings

Fig. 1 is a schematic diagram of interlock control according to an embodiment of the present invention.

Fig. 2 is a general block diagram of an embodiment of the present invention.

Detailed Description

In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the utility model. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the utility model and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 and 2 show an embodiment of the present invention, and as shown in fig. 2, a demineralized water system includes an ultrafiltration filtration system and a reverse osmosis filtration system, wherein the ultrafiltration filtration system includes a raw water pump 1, a mixer a2, an ultrafiltration membrane water purification unit 3, a water purification tank a4, an ultrafiltration backwash pump 5, a bactericide adding device 6, and a concentrated water collection tank a7, and the ultrafiltration membrane water purification unit 3 is provided with a water inlet a3-1, a water purification port a3-2, and a concentrated water inlet a 3-3; the reverse osmosis filtration system comprises an RO water inlet pump 8, a mixer b9, a high-pressure pump 10, a reverse osmosis water purification unit 11, a water purification tank b12, a scale inhibitor dosing device 13 and a concentrated water collection tank b14, and further comprises a controller, wherein an LT liquid level meter a15 is arranged in the water purification tank a4, an LT liquid level meter b16 is arranged in the water purification tank b12, a flow meter a17 is arranged between the ultrafiltration backwashing pump 5 and the water purification port a3-2, a flow meter b18 is arranged between the mixer 2 and the water inlet a3-1, a metering pump a19 is arranged between the bactericide dosing device 6 and the mixer a2, a flow meter c20 is arranged between the RO water inlet pump 8 and the mixer b9, a metering pump b21 is arranged between the scale inhibitor dosing device 13 and the mixer b9, control ports of the raw water pump 1, the metering pump a ultrafiltration pump a19, the RO water inlet pump 8, the backwashing pump 5 and the metering pump b21 are connected with the controller, and the LT liquid level meters a15 and the LT liquid level meter b16 are arranged, The data ports of the flow meter a17, the flow meter b18 and the flow meter c20 are connected with the controller. The reverse osmosis water purification unit 11 comprises a water inlet b11-1, a water purification port b11-2 and a concentrated water port b11-3, a water outlet 4-1 is connected with the water inlet b11-1 after sequentially passing through an RO water inlet pump 8, a mixer b9 and a high-pressure pump 10, the water purification port b11-2 is connected with a purified water tank b12, the concentrated water port b11-3 is connected with a concentrated water collection tank b14, and a scale inhibitor dosing device 13 is connected with a mixer b 9. The reverse osmosis water purification units 11 are arranged in two groups in series, each group is provided with two reverse osmosis water purification units 11 in parallel, the concentrated water port b11-3 of the previous group of reverse osmosis water purification units 11 is connected with the water inlet b11-1 of the next group of reverse osmosis water purification units 11, and the concentrated water port b11-3 of the last group of reverse osmosis water purification units 11 is connected with the concentrated water collection tank b 14. The raw water pump 1 is connected with a water inlet a3-1 through a mixer 2, a water purifying port a3-2 is connected with a water purifying tank a4, a concentrated water port a3-3 is connected with a concentrated water collecting tank a7, and the mixer 2 is connected with a bactericide dosing device 6; the water purification tank a4 is provided with a water outlet 4-1, and the water outlet 4-1 is connected with a water purification port a3-2 through an ultrafiltration backwashing pump 5. Two ultrafiltration membrane water purification units 3 are arranged in parallel. Valves are arranged between the mixer a2 and the ultrafiltration membrane water purification unit 3, between the ultrafiltration membrane water purification unit 3 and the water purification tank a4, and between the ultrafiltration backwashing pump 5 and the water purification port a3-2, and control ports of the valves are connected with a controller. The bottoms of the purified water tank a4 and the purified water tank b12 are provided with sewage outlets. The concentrated water port b11-3 is also connected with a drain pipe, a valve is arranged on the drain pipe, a drain pipe is also arranged on the pipeline between the water purification port b11-2 and the water purification tank b12, and a valve is arranged on the drain pipe.

As shown in figure 1, the design is based on that a demineralized water control system comprises a pressure gauge, a pressure transmitter, a flowmeter and other necessary instruments, a linkage control program is additionally arranged, a sensor measuring element on the device obtains an actual numerical value through the operation processing of a 4-20mA or other standard signals by an A/D module of the control system, the actual numerical value is compared with a set value in the system, the obtained numerical value deviation is transmitted to a D/A module through the operation of a controller, and a corresponding 4-20mA or other signals are output to a corresponding execution mechanism such as a frequency converter, a regulating valve and the like and finally transmitted to a controlled object such as an electric motor, an air/electric valve and the like. Open-loop control refers to designing an interval corresponding relation between a group of devices in a program, wherein the output size of the controlled device is changed along with the output size of the control device, but the output size is not real-time and only corresponds to a numerical value interval.

1. The raw water pump 1 is interlocked (interlocked 1) with an LT liquid level meter a15 in a water purification tank a4 through a controller, so that the liquid level is always constant at a set value, and the operation of an interference system caused by excessive people due to unstable water is avoided; 2. when the ultrafiltration system is backwashed, the ultrafiltration backwashing pump 5 is interlocked (interlocked 2) with the flowmeter a17 through the controller, and the constant backwashing flow is set, so that each backwashing of the ultrafiltration system is ensured to reach the factory design flux standard, and the running time of the ultrafiltration system is prolonged; 3. a low liquid level alarm linkage is arranged in the controller system, and when the liquid level in the water purification tank a4 can not meet the liquid level requirements of the RO water inlet pump 8 and the ultrafiltration backwashing pump 5, the alarm is triggered and the RO water inlet pump 8 and the ultrafiltration backwashing pump 5 are closed; 4. the metering pump a19 of the bactericide dosing device 6 is linked (linked 6) with the flowmeter b18 through open-loop control, and the opening degree of the metering pump a19 is automatically controlled according to the water inflow, so that the dosing quantity is changed due to the change of the water inflow, and the phenomenon that the ultrafiltration device is stopped due to membrane fouling caused by excessive or insufficient dosing quantity in the operation process is prevented; 5. the chain of the reverse osmosis filtration system is approximately consistent with the chain in the ultrafiltration device, the high-pressure pump 10 is connected with an LT liquid level meter b16 (chain 5) through a controller, so that the liquid level of a water purification tank b12 is constant at a set numerical value, a high-low liquid level alarm chain is also arranged in a water purification tank b12, and the operation of the high-pressure pump 10 is stopped when the liquid level of the water purification tank b12 is overhigh, so that the equipment safety in the reverse osmosis filtration system is ensured; 6. the metering pump b21 of the scale inhibitor dosing device 13 is linked (linked 7) with the flow meter c20 through open loop control, and the opening degree of the metering pump b21 is automatically controlled according to the water inflow, so that the dosing quantity is changed along with the change of the water inflow, and the phenomenon that the reverse osmosis filtration system is blocked due to membrane fouling caused by excessive or insufficient dosing quantity in the operation process, the device is stopped, and the scale inhibitor is continuously added is prevented.

The raw water mainly comprises tap water, river water and reclaimed water generated after industrial water treatment, the raw water firstly enters an ultrafiltration filter system to obtain primary essence purified water and waste water, and the primary essence purified water enters the reverse osmosis filter system to obtain non-salt purified water. The ultrafiltration system mainly filters large-particle substances in raw water, and the reverse osmosis system filters small-particle impurities such as salt microorganisms. The concentrated water obtained by the ultrafiltration system can be used for equipment cleaning, cleaning in fields, green land irrigation and the like, and the concentrated water obtained by the reverse osmosis system can be pumped back to the inlet of the reverse osmosis system for re-filtration and re-extraction, and can also be used for wastewater treatment.

Although the present invention has been described with reference to the specific embodiments shown in the drawings, it is not intended to limit the scope of the present invention, and various modifications and variations can be made by those skilled in the art without inventive changes based on the technical solution of the present invention.

Claims

1. A demineralized water system comprises an ultrafiltration filtration system and a reverse osmosis filtration system, wherein the ultrafiltration filtration system comprises a raw water pump (1), a mixer a (2), an ultrafiltration membrane water purification unit (3), a water purification tank a (4), an ultrafiltration backwashing pump (5), a bactericide dosing device (6) and a concentrated water collection tank a (7), and the ultrafiltration membrane water purification unit (3) is provided with a water inlet a (3-1), a water purification port a (3-2) and a concentrated water port a (3-3); reverse osmosis filtration system includes RO intake pump (8), blender b (9), high-pressure pump (10), reverse osmosis water purification unit (11), water purification jar b (12), antisludging agent charge device (13), dense water collection tank b (14), characterized by: the desalting water system also comprises a controller, an LT liquid level meter a (15) is arranged in the water purifying tank a (4), an LT liquid level meter b (16) is arranged in the water purifying tank b (12), a flow meter a (17) is arranged between the ultrafiltration backwashing pump (5) and the water purifying port a (3-2), a flow meter b (18) is arranged between the mixer a (2) and the water inlet a (3-1), a metering pump a (19) is arranged between the bactericide dosing device (6) and the mixer a (2), a flow meter c (20) is arranged between the RO water inlet pump (8) and the mixer b (9), a metering pump b (21) is arranged between the scale inhibitor dosing device (13) and the mixer b (9), the control ports of the raw water pump (1), the metering pump a (19), the RO water inlet pump (8), the ultrafiltration backwashing pump (5) and the metering pump b (21) are connected with the controller, data ports of the LT liquid level meters a (15), LT liquid level meters b (16), flow meters a (17), flow meters b (18) and c (20) are connected with the controller.

2. The demineralized water system according to claim 1, characterized in that the reverse osmosis water purification unit (11) comprises a water inlet b (11-1), a water purification port b (11-2) and a concentrated water port b (11-3), the water outlet (4-1) is connected with the water inlet b (11-1) after sequentially passing through an RO water inlet pump (8), a mixer b (9) and a high-pressure pump (10), the water purification port b (11-2) is connected with a water purification tank b (12), the concentrated water port b (11-3) is connected with a concentrated water collection tank b (14), and a scale inhibitor dosing device (13) is connected with the mixer b (9).

3. The desalted water system as claimed in claim 2, wherein said reverse osmosis water purification units (11) are arranged in at least two groups in series, each group is provided with at least two reverse osmosis water purification units (11) in parallel, the concentrate inlet b (11-3) of the previous group of reverse osmosis water purification units (11) is connected with the inlet b (11-1) of the next group of reverse osmosis water purification units (11), and the concentrate inlet b (11-3) of the last group of reverse osmosis water purification units (11) is connected with the concentrate collection tank b (14).

4. The demineralized water system according to claim 1, characterized in that the raw water pump (1) is connected with a water inlet a (3-1) after passing through a mixer a (2), the water purifying port a (3-2) is connected with a water purifying tank a (4), the concentrated water port a (3-3) is connected with a concentrated water collecting tank a (7), and the mixer a (2) is connected with a bactericide adding device (6); the water purifying tank a (4) is provided with a water outlet (4-1), and the water outlet (4-1) is connected with a water purifying port a (3-2) through an ultrafiltration backwashing pump (5).

5. A desalinated water system according to claim 1, wherein at least two of said ultrafiltration membrane water purification units (3) are arranged in parallel.

6. The demineralized water system according to claim 1, characterized in that valves are arranged between the mixer a (2) and the ultrafiltration membrane water purification unit (3), between the ultrafiltration membrane water purification unit (3) and the purified water tank a (4), and between the ultrafiltration backwashing pump (5) and the purified water port a (3-2), and control ports of the valves are connected with a controller.

7. The demineralized water system according to claim 1, characterized in that the clean water tank a (4) and the clean water tank b (12) are provided with a drain at the bottom.

8. The system of claim 2, wherein the dense water port b (11-3) is further connected with a drain pipe, a valve is arranged on the drain pipe, a drain pipe is also arranged on a pipeline between the clean water port b (11-2) and the clean water tank b (12), and a valve is arranged on the drain pipe.