CN212016864U

CN212016864U - Backwashing control system based on V-shaped filter tank

Info

Publication number: CN212016864U
Application number: CN201922032323.XU
Authority: CN
Inventors: 刘国壮; 刘发明
Original assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Current assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-11-27
Anticipated expiration: 2029-11-21

Abstract

The utility model relates to the technical field of water purification treatment, in particular to a backwashing control system based on a V-shaped filter tank; the device comprises a water flushing pressure sensor, an air flushing pressure sensor, an exhaust valve, a drain valve, a clean water tank water level meter, a turbidity meter and a clean water valve which are respectively connected with a communication module of a controller; the fan and the hydroelectric washing motor are connected with the controller through a frequency converter; the controller is a fuzzy controller and comprises a corresponding fuzzy algorithm storage module, wherein the corresponding values of the backwashing setting values of the water level and the turbidity, the pressure and the flushing intensity and the corresponding fuzzy algorithm storage module are stored; and the identification editing module is provided with the unique specific identification of the water flushing pressure sensor, the air flushing pressure sensor, the clean water tank water level meter and the turbidimeter. The embodiment of the utility model provides an adopt fuzzy controller, can make the opportunity and the intensity of back flush obtain optimizing, reduce the energy consumption, the dirty ability of intercepting of increase filtering layer prolongs duty cycle.

Description

Backwashing control system based on V-shaped filter tank

Technical Field

The utility model relates to a water purification treatment technical field especially relates to a back flush control system based on V type filtering pond.

Background

The V-shaped filter tank is a quick filter tank developed by Delaima France company, and is named after the fact that V-shaped grooves are adopted for water inlet. The early sixty years are adopted in the first place in the oly water works in paris, and the seventy years are gradually widely used in europe and are favored by various countries after being applied in italy, israel, morocco, honduras, venezuela and other countries in sequence, so that the method is gradually popularized internationally. Since the eighties, China also recognized the unique flushing effect of the foreign innovative air-water backwashing technology, and introduced the foreign advanced air-water backwashing technology successively, so that the technology is widely applied to newly-expanded water plants.

The V-shaped filter is an important link in a water purification process of a water plant, the regeneration of the filtering capacity of the filter is a key for stable and efficient operation of the filter, and the regeneration of the filtering capacity of the filter is obtained through the backwashing effect. Most of the control systems adopted by the existing backwashing are traditional PID control strategies, the algorithm is simple, the robustness is good, the reliability is high, and the method is widely applied to control of the filter tank of the water plant and the backwashing process.

The defects of the prior art are that the PID control strategy is low in response speed of the dynamic change of the strength and time of backwashing, low in precision, easy to cause the deterioration of water quality and increase in energy consumption.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that prior art exists, the embodiment of the utility model provides a back flush control system based on V type filtering pond for the intensity and the time dynamic change response time of back flush among the solution prior art are slow, lead to the technical problem of energy consumption increase.

A backwash control system based on a V-shaped filter tank comprises an exhaust valve arranged at an exhaust port at the top of the filter tank and a drain valve arranged at a water outlet; the height of the drain valve is flush with the height of the filter material in the filter tank; a clean water tank water level meter and a turbidimeter are arranged on the inner wall of the clean water tank at the bottom of the filter tank; the clean water tank water level meter is positioned above the liquid level of the clean water tank; the turbidimeter is immersed in the liquid level of the clean water tank; a controller is arranged on one side of the bottom of the filter tank and is connected with a fan and a water washing motor through a frequency converter; an air blast pressure sensor, an air blast valve, a water blast pressure sensor and a water blast valve are respectively arranged at one end of the pipeline close to the fan and the water washing motor; the other ends of the pipelines corresponding to the fan and the water washing motor are connected with the filter material bottom plate of the filter tank; a clean water valve is arranged at the water outlet on the other side of the bottom of the filter tank; the water flushing pressure sensor, the air flushing valve, the water flushing valve, the exhaust valve, the drain valve, the clean water tank water level meter, the turbidity meter and the clean water valve are respectively connected with the communication module of the controller; the controller is a fuzzy controller and also comprises a storage module which stores backwashing setting values of water level and turbidity, corresponding values of pressure and flushing intensity and a corresponding fuzzy algorithm; and the identification editing module is provided with the unique specific identification of the water flushing pressure sensor, the air flushing pressure sensor, the clean water tank water level meter and the turbidimeter.

A filter material height detector is also arranged above the filter material of the filter tank and is connected with the communication module; and the identification editing module sets a unique specific identification for the filter material height detector.

The turbidimeter comprises a water inlet, a water outlet, a flow cell, a reflector lamp, an A/D converter and a photoelectric tube detector immersed below the liquid level of the clean water pool; the signal output end of the photoelectric tube detector is connected with the signal input end of the A/D converter; and the spotlight beam is projected downwards into a water sample of the clean water tank.

The embodiment of the utility model provides a back flush control system based on V type filtering pond adopts fuzzy controller, can make the opportunity and the intensity of back flush obtain optimizing, makes the filtering pond be in operation under the optimal condition, not only can improve quality of water but also can reduce the energy consumption, increases the dirt cutting ability of filtering layer, extension duty cycle.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required for the technical description of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a block diagram of a backwash control system based on a V-shaped filter tank according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a backwash control system based on a V-shaped filter tank according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a turbidity meter of a backwash control system based on a V-shaped filter tank according to an embodiment of the present invention;

reference numerals:

drain valve-1 filter material bottom plate of filter tank-11 blower-3 water flushing valve-4

Air flushing valve-5 turbidimeter-6 clean water valve-7 water flushing motor-8

Clean water pool water level meter-9 controller-10 filter material height detector-2 exhaust valve-12

Filter chamber-15 water flushing pressure sensor-13 air flushing pressure sensor-14 clean water tank-16

Spotlight-17 water inlet-18 water outlet-19 photoelectric tube detector-20

Flow cell-21 communication module-10.3 identification editing module 10.2 storage module 10.1

Frequency converter-10.4A/D converter-22.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

FIG. 2 is a schematic structural view of a backwash control system based on a V-shaped filter tank according to an embodiment of the present invention; as shown in fig. 1 and fig. 2, the device comprises an exhaust valve 12 arranged at an exhaust port on the inner wall of the top of the filter 15 and a drain valve 1 arranged at a drain port; the height of the drain valve 1 is flush with the height of the filter material in the filter 15; the inner wall of a clean water tank 16 at the bottom of the filter 15 is provided with a clean water tank water level meter 9 and a turbidimeter 6; the clean water tank water level gauge 9 is positioned above the liquid level of the clean water tank 16; the turbidimeter is immersed in the liquid level of the clean water tank 16; a controller 10 is arranged on one side of the bottom of the filter 15, and the controller 10 is connected with the fan 3 and the water washing motor 8 through a frequency converter 10.4; an air blast pressure sensor 14, an air blast valve 5, a water blast pressure sensor 13 and a water blast valve 4 are respectively arranged at one end of the pipeline, which is close to the fan 3 and the water washing motor 8; the other ends of the fan 3 and the water washing motor 8 corresponding to the pipelines are connected with a filter material bottom plate of the filter 15; a clean water valve 7 is arranged at the water outlet on the other side of the bottom of the filter 15; the water flushing pressure sensor 13, the air flushing pressure sensor 14, the air flushing valve 5, the water flushing valve 4, the exhaust valve 12, the drain valve 1, the clear water pool water level meter 9, the turbidimeter 6 and the clear water valve 7 are respectively connected with the communication module 10.3 of the controller 10; the controller 10 is a fuzzy controller, and the controller 10 further comprises a storage module 10.1 which stores backwash setting values of water level and turbidity, corresponding values of pressure and flushing intensity and corresponding fuzzy algorithms; and the controller 10 is provided with an identification editing module 10.2 for uniquely identifying the water flushing pressure sensor 13, the air flushing pressure sensor 14, the clean water pool water level meter 9 and the turbidimeter 6.

Specifically, the preferred fuzzy controller of the embodiment of the present invention is a PLC, and the internal storage module 10.1 thereof prestores corresponding values of the backwashing setting value of the water level and turbidity, the pressure and the washing intensity, and the corresponding fuzzy algorithm. The identification editing module 10.2 sets that sensors such as the water flushing pressure sensor 13, the air flushing pressure sensor 14, the turbidimeter 6, the clear water tank water level meter 9 and the like have unique specific identifications, and after the settings, the controller 10 can accurately determine the filtering and backwashing conditions of the filter 15, so that the V-shaped filter is controlled according to program settings; the water flushing pressure sensor 13, the air flushing pressure sensor 14, the clean water tank water level gauge 9, the turbidity meter 6 and other sensors monitor the filter 15 in real time, the monitoring data is fed back to the controller 10 through the communication module 10.3 for fuzzy operation, and the valves are controlled to be opened or closed; the water level meter 9 and the controller 10 of the clean water tank are mutually matched, so that when the water level of the clean water tank is low, the frequency converter 10.4 can be started to control the current and the frequency of the fan 3 and the water washing motor 8, the water washing motor 8 and the fan 3 are controlled to carry out back washing, and the output power of the back washing motor are controlled, namely the strength of the back washing is controlled; the turbidity meter 6, the drain valve 1 and the controller 10 are mutually matched and can control the strength and the form of backwashing and the opening degrees of the drain valve 1 and the exhaust valve 12 aiming at the turbidity of the filtered water; the air impact pressure sensor 14 and the water impact pressure sensor 13 are matched with the controller 10 to make the measured data feedback and operate, so that the air impact and water impact processes are dynamically changed; for example, after the backwashing stage, the clean water valve 7 is closed, the turbidimeter 6 and the clean water tank level gauge 9 are monitored in real time, monitoring data are fed back to the controller 10 for fuzzy operation, the fan 3 is controlled to operate, 60 seconds of delay is needed after the fan 3 is started, the operation state of the fan is stabilized, the air flushing valve 5 is opened, then the exhaust valve 12 is closed, air enters the filter material bottom plate of the filter 15 through a corresponding pipeline and is sprayed out by the long-handle filter head, impurities on the surface of the filter material are scrubbed and suspended in water, the drain valve 1 is opened, and the filter is flushed into a water outlet by surface scavenging water to carry out air flushing on the filter for a period of; then opening a water flushing motor 8 and a water flushing valve 4 to carry out air-water combined flushing, and closing an air flushing valve 5 and an air blower 3 after the air-water combined flushing is finished; and (5) entering a water flushing process, and closing the water flushing valve 4 and closing the drain valve 1 after the water flushing is finished.

Furthermore, a filter material height detector 2 is also arranged above the filter material of the filter 15, and the filter material height detector 2 is connected with the communication module 10.3; the identification editing module 10.2 sets a unique specific identification for the filter material height detector 2; when the filter material is lower than the fixed value of the height of the filter material by the identification editing module 10.2, the controller 10 sends a signal to a connected human-computer interaction system.

FIG. 3 is a schematic structural view of a turbidity meter of a backwash control system based on a V-shaped filter tank according to an embodiment of the present invention; as shown in fig. 3, the turbidimeter 6 comprises a water inlet 18, a water outlet 19, a flow cell 21, a reflector lamp 17, an a/D converter 22 and a photocell detector 20 immersed below the liquid level of the clean water reservoir; the signal output end of the photoelectric tube detector 20 is connected with the signal input end of an A/D converter 22; and the light beam of the spotlight (17) is projected downwards into the water sample of the clean water tank 16. Specifically, the turbidimeter 6 is installed in a flow-through manner, the photoelectric tube detector 20 immersed in the water sample detects scattered light of suspended substances in the water in the direction of 90 degrees, and the amount of the scattered light has a direct proportion relation with the turbidity in the water sample; the turbidity data of the water sample collected by the photocell detector 20 is sent to the a/D converter 22, and is fed back to the controller 10 in real time after being subjected to a/D conversion.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A backwash control system based on a V-shaped filter tank comprises an exhaust valve (12) arranged at an exhaust port at the top of the filter tank (15) and a drain valve (1) arranged at a drain port; the height of the drain valve (1) is flush with the height of the filter material in the filter tank (15); a clean water tank water level meter (9) and a turbidimeter (6) are arranged on the inner wall of the clean water tank (16) at the bottom of the filter tank (15); the clean water tank water level gauge (9) is positioned above the liquid level of the clean water tank; the turbidimeter (6) is immersed in the liquid level of the clean water tank; a controller (10) is arranged on one side of the bottom of the filter tank (15), and the controller (10) is connected with the fan (3) and the water washing motor (8) through a frequency converter (10.4); an air blast pressure sensor (14), an air blast valve (5), a water blast pressure sensor (13) and a water blast valve (4) are respectively arranged at one end of the pipeline, which is close to the fan (3) and the water washing motor (8); the other ends of the fan (3) and the water washing motor (8) corresponding to the pipelines are connected with a filter material bottom plate (11) of the filter tank (15); a clean water valve (7) is arranged at the water outlet on the other side of the bottom of the filter tank (15); the water flushing pressure sensor (13), the air flushing pressure sensor (14), the air flushing valve (5), the water flushing valve (4), the exhaust valve (12), the drain valve (1), the clean water tank water level meter (9), the turbidity meter (6) and the clean water valve (7) are respectively connected with the communication module (10.3) of the controller (10); the device is characterized in that the controller (10) is a fuzzy controller, and the controller (10) further comprises a storage module (10.1) which stores backwashing setting values of water level and turbidity, corresponding values of pressure and washing strength and corresponding fuzzy algorithms; and the identification editing module (10.2) is provided with the unique specific identification of the water flushing pressure sensor (13), the air flushing pressure sensor (14), the clean water tank water level meter (9) and the turbidimeter (6).

2. The backwashing control system based on the V-shaped filter tank as claimed in claim 1, wherein a filter material height detector (2) is further arranged above a filter material of the filter tank (15), and the filter material height detector (2) is connected with the communication module (10.3); the identification editing module (10.2) sets a unique specific identification for the filter material height detector.

3. The backwash control system based on a V-shaped filter tank as claimed in claim 1, characterized in that the turbidimeter (6) comprises a water inlet (18), a water outlet (19), a flow cell (21), a spot light (17), an A/D converter (22) and a photoelectric tube detector (20) immersed under the liquid level of the clean water tank; the signal output end of the photoelectric tube detector (20) is connected with the signal input end of an A/D converter (22); and the light beam of the spotlight (17) is projected downwards into a water sample in the clean water tank (16).