CN110482625A - A kind of high rate filter backwash energy saver and its application method - Google Patents

Abstract

The application discloses a high-speed filter backwash energy-saving device and its use method, including a high-speed filter, a backwash water inlet start-stop control system, a backwash water outlet master electric valve, and a backwash water inlet start-stop control system including a multi-functional The water pump control valve, the main backwash water inlet electric valve, the backwash water inlet main manual valve, the electromagnetic flowmeter, and the two ends of the multifunctional water pump control valve are respectively connected with the water supply pump of the high-level water tank and the water inlet end of the backwash water inlet main electric valve. The outlet end of the main backwash water inlet electric valve is connected to the water inlet end of the backwash water inlet master manual valve, the outlet end of the backwash water inlet master manual valve is connected to the water inlet end of the electromagnetic flowmeter, and the outlet end of the electromagnetic flowmeter is connected to the backwash inlet port of the high-speed filter. At the water end, the two ends of the main electric valve for backwashing water are respectively connected to the backwashing water end of the high-speed filter and the sewage pool. The application solves the problems of backwash pump waste of electric energy and short life due to frequent start and stop, and simultaneously solves the problem of seal leakage of backwash effluent electric butterfly valve and waste caused by frequent replacement of electric valve spare parts.

Description

A high-speed filter backwash energy-saving device and its application method

technical field

The present application relates to the technical field of high-speed filter cleaning, in particular to a high-speed filter backwash energy-saving device and a method for using the same.

Background technique

In the production of wide and thick plates, the high-speed filter is used to purify the sewage containing scale and oily water produced by rolling steel. The high-speed filter has the characteristics of high filtration speed and large flow. The sewage is filtered through the sewage, and the filtered water is discharged out of the high-speed filter through the electric valve of the filtered water. The parallel use of multiple high-speed filters can improve the treatment efficiency of sewage. However, in the actual use process, when the sewage is filtered for a certain period of time, due to the continuous accumulation of impurities on the filter layer and the surface of the filter head, water resistance is generated, the water flow rate is reduced, and the pressure drop between the filter water inlet and the filter water outlet is reduced. In order to improve the filtration efficiency, it is necessary to backwash the filter at this time. The backwashing is controlled by PLC program, which can realize the automatic backwashing operation of multiple high-speed filters one by one.

In the high-speed filter backwashing device used in traditional technology, the backwash inlet and outlet valves of each high-speed filter are mostly electric butterfly valves, which are closed during normal filtration. Such as Chinese patent CN203291576U a kind of cleaning device of high-speed filter and Chinese patent CN109316789A a kind of circulation cleaning type high-speed filter, all can realize the backwash to high-speed filter.

The above-mentioned high-speed filter uses the PLC control module to control the opening and closing of the electric butterfly valve and the start and stop of the backwash pump to realize backwashing. However, after the backwashing device is used for a period of time, the sealing performance of the backwashing electric butterfly valve will become poor, and small flow leakage will occur. , the use of multiple high-speed filters in parallel will increase the leakage, resulting in a long flow of water in the backwash main pipe, and the clean water used for backwashing will flow to the sewage tank, resulting in waste of water resources. waste of spare parts. In addition, the commonly used high-speed filter backwash must be equipped with a backwash pump to provide water for backwashing the high-speed filter. The design flow rate of the backwash pump is usually greater than the flow rate used for backwashing the high-speed filter, and the power consumption of the backwash pump will be reduced. It causes waste; in addition, when backwashing the high-speed filter, it is necessary to frequently start and stop the backwash pump, which will shorten the service life of the backwash pump.

Contents of the invention

In order to solve the above technical problems, the application proposes the following technical solutions:

In the first aspect, an embodiment of the present application provides a high-speed filter backwash energy-saving device, including a plurality of high-speed filters, a backwash water inlet start-stop control system, and a backwash water outlet master electric valve, and each high-speed filter is provided with There are filter water inlet electric valves, filter water outlet electric valves, backwash water inlet electric valves and backwash water outlet electric valves, of which:

The start-stop control system of backwash water inlet includes multi-functional water pump control valve, backwash water inlet main electric valve, backwash water inlet main manual valve and electromagnetic flowmeter, and the two ends of backwash water inlet main electric valve are respectively connected with the multifunctional water pump. The water outlet of the control valve is connected with the water inlet of the main backwash water inlet manual valve. The water inlet end of the electromagnetic flowmeter is connected, and the water outlet end of the electromagnetic flowmeter is connected with the backwash water inlet electric valve of the high-speed filter;

The main electric valve for backwash effluent is arranged between the electric valve for backwash effluent and the sewage pool, and the electric valve for backwash effluent of each high-speed filter is connected with the main electric valve for backwash effluent.

Using the above implementation method, the switch of the backwash water inlet main electric valve is used to replace the start and stop of the backwash pump, and the backwash pump is no longer used to control the backwash water, and the backwash pump will not be shortened due to frequent start and stop of the backwash pump In the case of the service life of the high-speed filter, there will be no waste of electric energy for the backwash pump; at the same time, this application is equipped with a backwash water main electric valve. The backwash water outlet electric valve forms a double valve seal, which enhances the sealing performance and solves the leakage problem of the backwash water outlet electric butterfly valve seal. If leakage occurs, only the main backwash water outlet electric valve needs to be replaced, saving spare parts for the electric valve.

In combination with the first aspect, in the first possible implementation of the first aspect, the backwash water inlet electric valve of each high-speed filter is connected in parallel to the backwash water inlet main pipe, and the water inlet of the backwash water inlet electric valve One end of the backwash water inlet main pipe is connected to the water outlet end of the electromagnetic flowmeter, and the other end of the backwash water inlet main pipe is sealed.

In combination with the first possible implementation of the first aspect, in the second possible implementation of the first aspect, each backwash water outlet electric valve is connected in parallel to the backwash water outlet main pipe, and the outlet end of the backwash water outlet electric valve It is connected with the backwash water outlet main pipe, one end of the backwash water outlet main pipe is sealed, and the other end of the backwash water outlet main pipe is connected to the water inlet end of the backwash water outlet main electric valve, and the water outlet end of the backwash water outlet main electric valve passes through the sewage drain pipe and Sewage connection.

By adopting the above implementation method, the backwash water inlet main pipe and the backwash water outlet main pipe are all connected in parallel, which can realize the backwash of a single high-speed filter and save the backwash pipeline used.

With reference to the first possible implementation of the first aspect, in the third possible implementation of the first aspect, the water supply pump of the high-level water tank is normally on to supply water to the steel rolling production line. With the above implementation method, the high-level water tank water supply pump that supplies water to the steel rolling production line is used to supply water to the backwashing process. There is no need to set up a separate backwash pump, and no damage will be caused by the frequent start and stop of the backwash pump. At the same time, the high-level water tank water supply pump is always open, which can Timely supply water for the backwashing process without affecting the normal water use of the steel rolling production line.

In combination with the fourth possible implementation of the first aspect, in the fourth possible implementation of the first aspect, the backwash energy-saving device in the embodiment of the present application is provided with a first PLC control module and a second PLC control module, two groups The PLC control module is used to jointly control the filtration process and backwashing process of the high-speed filter. By adopting the above implementation method, the PLC control module is used to control the opening and closing of the electric valve in the backwashing process, so that the control device realizes filtering or backwashing.

In combination with the first possible implementation of the first aspect, in the fifth possible implementation of the first aspect, the first PLC control module is respectively connected with the electric valve for filtering water inlet, the electric valve for filtering water outlet, the electric valve for backwashing water inlet, The backwash outlet water electric valve and the backwash outlet water main electric valve are electrically connected. The backwash outlet water electric valve and the backwash water outlet main electric valve form the backwash water outlet main electric valve follower system. The second PLC control module is connected to the backwash water inlet main electric valve. Valve electrical connection. Using the above implementation, the first PLC control module is the control module of the original backwashing device, using the first PLC control module to control the electric valve for filtering water inlet, the electric valve for filtering water outlet, the electric valve for backwashing water inlet, the electric valve for backwashing water outlet, The switch of the main electric valve for backwashing water, the second PLC control module is connected with the first PLC control module, and the first PLC control module controls the start and stop of the backwash pump to use the second PLC control module to control the backwash water inflow The switch of the main electric valve realizes backwashing water supply.

In combination with the sixth possible implementation of the first aspect, in the sixth possible implementation of the first aspect, the total electric valve follower system for backwashing effluent includes:

In the first PLC control module, the automatic opening limit switch FC-ON terminal of each high-speed filter backwash water outlet electric valve is electrically connected to the automatic opening position FC-ON terminal of the backwash water outlet main electric valve; each The FC-OFF connection terminals of the automatic close limit switch of the backwash water outlet electric valve of the high-speed filter are respectively electrically connected with the automatic close limit FC-OFF connection terminals of the backwash water outlet main electric valve.

By adopting the above implementation method, by establishing the following system of the main electric valve of backwash effluent, it can ensure that the main electric valve of backwash effluent has good followability. When performing backwashing, the main electric valve of backwash effluent can follow the high-speed The backwash effluent electric valve of the filter is opened to discharge the sewage in time; when filtering, the main backwash effluent electric valve can follow the backwash effluent electric valve of the high-speed filter to close to ensure the sealing effect.

In combination with the seventh possible implementation of the first aspect, in the seventh possible implementation of the first aspect, the stroke switching time of the backwashing outlet electric valve is shorter than the stroke switching time of the outlet electric valve of each high-speed filter . By adopting the above implementation method, the main electric valve of the backwash water outlet can be opened or closed in advance before the electric water outlet valve of the high-speed filter is opened or closed in place, so as to ensure the timeliness of the follow-up response of the main electric valve of the backwash water outlet, and can Smooth water outlet and tight seal.

In the second aspect, the embodiment of the present application provides a method for using a high-speed filter backwash energy-saving device, the method comprising:

S1: Start the water supply pump of the high-level water tank to supply water to the high-level water tank and the backwashing device, and at the same time, the first PLC control module controls and closes the electric valve for filtering water in and the electric valve for filtering out water of each high-speed filter;

S2: The second PLC control module controls to open the main backwash water inlet electric valve, and at the same time, the first PLC control module controls to open the backwash water inlet electric valve and the backwash water outlet electric valve of the first high-speed filter, and the backwash water outlet main electric valve The valve follows open;

S3: Manually adjust the main manual valve of backwash water inlet to control the water flow, observe the reading of the electromagnetic flowmeter, and stop adjusting the main manual valve of backwash water inlet when the reading reaches the flow required for backwashing of a single high-speed filter, and Fixed backwash water inlet main manual valve;

S4: The main manual valve for backwash water inlet controls the water flow to supply water at the required flow rate for backwashing of the high-speed filter, and the first PLC control module and the second PLC control module jointly control the high-speed filter to backwash one by one;

S5: After the backwashing is completed, the second PLC control module controls the main backwash water inlet electric valve 7 to close, and the first PLC control module controls the backwash water inlet electric valve and the backwash water outlet electric valve of the high-speed filter to close, and the backwash The main electric valve of the water outlet will follow and close to form a double valve seal;

S6: the first PLC control module controls the opening of the electric valve for filtered water inlet and the electric valve for filtered water outlet of the high-speed filter, and the high-speed filter continues to perform normal filtering work.

Description of drawings

Fig. 1 is a schematic structural diagram of a high-speed filter backwash energy-saving device provided by the embodiment of the present application;

Fig. 2 is a schematic diagram of the backwash effluent main electric valve following system provided by the embodiment of the present application;

Fig. 3 is the program ladder diagram of the second PLC control module controlling the switch of the main electric valve of backwash water inlet provided by the embodiment of the present application;

4 is a schematic flow diagram of a method for using a high-speed filter backwash energy-saving device provided in an embodiment of the present application;

In Figure 1-4, the symbols are represented as: 1-high-speed filter, 2-backwash water inlet start-stop control system, 3-backwash water outlet main electric valve, 4-backwash water inlet electric valve, 5-backwash water outlet Electric valve, 6-multifunctional water pump control valve, 7-backwash water inlet main electric valve, 8-backwash water inlet main manual valve, 9-electromagnetic flowmeter, 10-first water pipe, 11-second water pipe, 12 -The third water pipe, 13-the fourth water pipe, 14-backwash water inlet main pipe, 15-backwash water outlet main pipe, 16-sewage drainage pipe, 17-high water tank water supply pump, 18-sewage pool, 19-filter water inlet electric Valve, 20-Filter water electric valve, 1FC-ON—1# high-speed filter backwash water electric valve automatically opens to the position switch, 1FC-OFF—1# high-speed filter backwash water electric valve automatically closes to the position switch, 2FC-ON —2# high-speed filter backwash water outlet electric valve automatically opens to the limit switch, 2FC-OFF—2# high-speed filter backwash water outlet electric valve automatically closes to the position switch, 3FC-ON—3# high-speed filter backwash water outlet electric valve automatically Open position switch, 3FC-OFF—3# high-speed filter backwashing water electric valve automatically closes to the position switch, 4FC-ON—4# high-speed filter backwashing water electric valve automatically opens to the position switch, 4FC-OFF—4# high-speed filtration 5FC-ON—Automatically open the switch for the total backwash effluent electric valve, 5FC-OFF—Automatically close the switch for the total backwash effluent electric valve.

Detailed ways

The scheme will be described below in conjunction with the accompanying drawings and specific implementation methods.

Figure 1 is a high-speed filter backwash energy-saving device provided by the embodiment of the present application, including 1#, 2#, 3#, 4#, a total of 4 backwash high-speed filters with an inflow flow rate of 400 cubic meters per hour 1. Backwash water inlet start-stop control system 2 and backwash water outlet main electric valve 3, 4 high-speed filters 1 are equipped with filter water inlet electric valve 19 and filter water outlet electric valve 20 for normal filtration. For the water inflow and outflow during the filtration process, the four high-speed filters 1 are also equipped with a backwash water inlet electric valve 4 and a backwash water outlet electric valve 5 for backwashing, wherein:

The start-stop control system 2 of the backwash water inlet comprises a multifunctional water pump control valve 6, a backwash water inlet main electric valve 7, a backwash water inlet main manual valve 8, and an electromagnetic flowmeter 9, and the inlet of the multifunctional water pump control valve 6 is The water end communicates with the water outlet of the high-level water tank water supply pump 17 through the first water pipe 10, and the water outlet end of the multifunctional water pump control valve 6 communicates with the water inlet end of the backwash main electric valve 7 through the second water pipe 11. The water outlet end of the main water inlet valve 7 is connected to the water inlet end of the backwash water inlet master manual valve 8 through the third water pipe 12, and the water outlet end of the backwash water inlet master manual valve 8 is connected to the electromagnetic flowmeter 9 through the fourth water pipe 13. The water inlet end and the water outlet end of the electromagnetic flowmeter 9 communicate with the backwash water inlet electric valve 4 of each high-speed filter 1 through the backwash water inlet main pipe 14 . The backwash effluent electric valve 5 of each high-speed filter 1 is in communication with the main backwash effluent electric valve 3 .

Further, the backwash water inlet end of each high-speed filter is provided with a backwash water inlet electric valve 4, and the four backwash water inlet electric valves 4 are all connected in parallel on the backwash water inlet main pipe 14, and the backwash water inlet The main pipe 14 is connected with the four backwash water inlet electric valves 4, one end of the backwash water inlet main pipe 14 is connected to the water outlet of the electromagnetic flowmeter 9, and the other end of the backwash water inlet main pipe 14 is sealed with a water pipe plug; 4 high-speed The backwash water outlet electric valve 5 of the filter is all connected in parallel on the backwash water outlet main pipe 15, and one end of the backwash water outlet main pipe 15 is sealed with a water pipe plug, and the other end is connected to the water inlet end of the backwash water outlet main electric valve 3, and the backwash water outlet main pipe 15 is sealed with a water pipe plug. The water outlet of the electric valve 3 communicates with the sewage pool 18 through the sewage drain pipe 16 , thereby discharging sewage into the sewage pool 18 .

Since the present embodiment is not equipped with a backwash pump, and the backwash process needs to use a water pump to extract clean water from the clear water tank, so the backwash process of this embodiment utilizes a high-level water tank water supply pump 17 to supply water, and the high-level water tank water supply pump 17 is used for To supply water to the high-level water tank, the flow rate of a single unit is 1200 cubic meters per hour. A total of 5 high-level water tanks are installed to supply water to the steel rolling production line. In order to ensure the normal water consumption of the production line, only one high-level water tank is normally opened. High water level, high water tank water supply pump 17 needs to be in normally open state. The water outlet of the high-level water tank water supply pump 17 is communicated with the water inlet switch of the high-level water tank and the water inlet of the multifunctional water pump control valve 6 respectively, and supplies backwash water and high-level water tank replenishment water simultaneously. However, when the high-level water tank water supply pump 17 starts and stops, the backwashing device will be damaged due to excessive instantaneous water pressure changes, and the water in the backwashing device will flow back into the high-level water tank water supply pump 17 and the high-level water tank after the high-level water tank water supply pump 17 stops the pump. The water tank causes pollution. In order to prevent the above situation, the present embodiment sets a multifunctional water pump control valve 6 between the water supply pump 17 of the high water tank and the main electric valve 7 of the backwash water. When the water supply pump 17 of the high water tank is in the normally open state, The multifunctional water pump control valve 6 is also in an open state by the water supply pressure, and the opening and closing of the backwashing water inlet is controlled by the opening and closing of the backwashing water inlet main electric valve.

Further, in order to control the opening and closing of each electric valve so as to realize the backwashing of the high-speed filter 1, two sets of PLC control modules are provided in this embodiment, which are respectively the first PLC control module and the second PLC control module. module, the first PLC control module is respectively electrically connected with the filter water inlet electric valve 19, the filter water outlet electric valve 20, the backwash water inlet electric valve 4, the backwash water outlet electric valve 5 and the backwash water outlet main electric valve 3, wherein the backwash The water outlet electric valve 5 and the backwash water outlet main electric valve 3 form a backwash water outlet main electric valve following system. The second PLC control module is electrically connected with the main electric valve 7 of the backwash water outlet, and independently controls the switch of the main electric valve 7 of the backwash water inlet.

Fig. 2 is the total electric valve follower system of the backwash water outlet of the present embodiment, in the first PLC control module: the backwash water outlet electric valve 5 of the 1#, 2#, 3#, 4# high-speed filter 1 is automatically opened in place After the switches 1FC-ON, 2FC-ON, 3FC-ON, 4FC-ON are connected in parallel, they are electrically connected with the automatic opening limit switch 5FC-ON of the main electric valve 3 for backwashing water, 1#, 2#, 3#, 4# high-speed filtration The automatic close limit switches 1FC-OFF, 2FC-OFF, 3FC-OFF and 4FC-OFF of the backwash water outlet electric valve 5 of the device 1 are electrically connected with the automatic close limit switch 5FC-OFF of the backwash water outlet main electric valve 3 in parallel. With the above connection method, when any one of the backwash water outlet electric valves 5 of the 1#, 2#, 3#, 4# high-speed filter 1 moves, the backwash water outlet main electric valve 3 can follow the backwash water outlet electric valve in time 5 actions.

Further, the stroke switch time of the backwash water outlet total electric valve 3 of this embodiment is slightly shorter than the stroke switch time of the backwash water outlet electric valve 5, and it has been opened or closed before the backwash water outlet electric valve 5 is opened or closed, so as to Ensure that the main electric valve 3 of the backwash effluent can be opened or closed in advance, and will not affect the signal acquisition of the PLC control module, so as to realize the double valve seal and prevent leakage at the backwash effluent end when the high-speed filter 1 is filtering .

Further, the second PLC control module realizes the automatic one-by-one cleaning of four high-speed filters by setting a certain time interval for the opening/closing of the main backwash water inlet electric valve 7. Figure 3 shows the backwashing of the device in this embodiment The second PLC control module of the energy-saving device controls the program ladder diagram of the backwash main electric valve 7 switch, the second PLC control module is connected with the first PLC control module, and the backwash pump is controlled in the first PLC control module The start-stop signal is converted into the open-close signal of the second PLC control module to control the backwash water inlet main electric valve 7, and its internal program and its internal writing program are annotated as follows:

Network 1: I0.0 is the pump start signal of the backwash pump. Take the rising edge command P to set the output point Q0.0 immediately and connect it, which is used as the valve opening signal of the main electric valve 7 of the backwash water inlet, and the main electric valve of the backwash water inlet Valve 7 opens;

Network 2: T37 timer sets the duration of backwash main electric valve 7 open valve signal, PT value is set to 200, T37 backwash time is up, reset the backwash main electric valve 7 open valve signal Q0.0 Disconnect, backwash main electric valve 7 of water inlet is closed, and the backwash of a high-speed filter ends;

Network 3: I0.1 is the pump stop signal of the backwash pump, take the falling edge command N to make the output point Q0.1 immediately set and connect as the backwash main electric valve 7 close signal, and the backwash main electric valve 7 off;

Network 4: T38 timer sets the signal duration of the backwash main electric valve 7 closing valve, the PT value is set to 200, T38 valve closing time is up, the backwashing water main electric valve 7 closing valve 3 signal Q0.1 is reset Disconnect, the main electric valve 7 of the backwash water inlet is opened, and the next high-speed filter is backwashed.

Corresponding to the high-speed filter backwash energy-saving device provided in the above embodiments, the present application also provides an embodiment of a method for using a high-speed filter backwash energy-saving device, see Figure 4, the method includes:

S1: Start the water supply pump of the high-level water tank to supply water to the high-level water tank and the backwashing device, and at the same time, the first PLC control module controls and closes the electric valve for filtering water in and the electric valve for filtering out water of each high-speed filter;

S2: The second PLC control module controls to open the main backwash water inlet electric valve, and at the same time, the first PLC control module controls to open the backwash water inlet electric valve and the backwash water outlet electric valve of the first high-speed filter, and the backwash water outlet main electric valve The valve follows open;

S3: Manually adjust the main manual valve of backwash water inlet to control the water flow, observe the reading of the electromagnetic flowmeter, and stop adjusting the main manual valve of backwash water inlet when the reading reaches the flow required for backwashing of a single high-speed filter, and Fixed backwash water inlet main manual valve;

S4: The main manual valve for backwash water inlet controls the water flow to supply water at the required flow rate for backwashing of the high-speed filter, and the first PLC control module and the second PLC control module jointly control the high-speed filter to backwash one by one;

S5: After the backwashing is completed, the second PLC control module controls the main backwash water inlet electric valve 7 to close, and the first PLC control module controls the backwash water inlet electric valve and the backwash water outlet electric valve of the high-speed filter to close, and the backwash The main electric valve of the water outlet will follow and close to form a double valve seal;

S6: the first PLC control module controls the opening of the electric valve for filtered water inlet and the electric valve for filtered water outlet of the high-speed filter, and the high-speed filter continues to perform normal filtering work.

In an exemplary embodiment, since the water supply pump 17 of the high-level water tank is in the normally open state, the multifunctional water pump control valve 6 is also in the open state:

(1) Start the high-level water tank water supply pump 17 to supply water to the high-level water tank and the backwashing device, and simultaneously the first PLC control module controls and closes the filtered water inlet electric valve 19 and the filtered water outlet electric valve 20 of each high-speed filter 1;

(2) The second PLC control module controls the opening of the backwash water inlet main electric valve 7, and the first PLC control module controls the backwash water inlet electric valve 4 and the backwash water outlet electric valve 5 of the 1# high-speed filter 1 at the same time. The main electric valve 3 of the washing water follows the electric valve 5 of the backwashing water of the 1# high-speed filter 1 through the backwashing water main electric valve following system;

(3) Manually adjust the total backwash water inlet manual valve 8 to control the water inlet flow, observe the indication of the electromagnetic flowmeter 9, and stop adjusting the total backwash inlet water when the indication of the electromagnetic flowmeter 9 reaches 400 cubic meters per hour. Manual valve 8, and fixed manual valve 8 for backwash water inlet;

(4) Backwash water inlet main manual valve 8 controls the water flow to supply water to the 1# high-speed filter at a flow rate of 400 cubic meters per hour, and the backwash water inlet main electric valve opens according to the backwash time preset by the second PLC control module Water supply for backwashing, the first PLC control module controls the 1# high-speed filter to backwash according to the preset backwashing time, after the preset backwashing time is up, the second PLC control module controls the backwashing main electric valve 7 to close Preset interval time.

In the preset interval time period, the first PLC control module controls the backwash water inlet main electric valve 4 of 1# high-speed filter, and at the same time, the first PLC control module controls the backwash water inlet electric valve 4 of 2# high-speed filter 1 Open, after the preset interval time is up, the second PLC control module controls the main backwash water inlet electric valve 7 to open to backwash the 2# high-speed filter.

Two groups of PLC control modules jointly control according to the above process to realize backwashing of 2#, 3#, 4# high-speed filters;

(5) After the backwashing of the four high-speed filters is completed, the second PLC control module controls the main backwash water inlet electric valve 7 to close, and at the same time, the first PLC control module controls the backwash water inlet electric valve 4 of the four high-speed filters 1 And the backwash water outlet electric valve 5 is closed, and the backwash water outlet main electric valve 3 is closed by the backwash water outlet main electric valve following the system to form a double-valve water inlet seal and a double-valve water outlet seal;

(6) The first PLC control module controls the electric valves of water inlet and water outlet of the four high-speed filters 1 to close, and the high-speed filters 1 continue to perform normal filtering work.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be realized by or using existing technologies, and will not be repeated here; the above embodiments and drawings are only used to illustrate that the technical solutions of the present invention are not It is a limitation to the present invention, and as an alternative, the present invention has only been described in detail with reference to the preferred embodiment, and those of ordinary skill in the art should understand that those of ordinary skill in the art are within the scope of the present invention. Changes, modifications, additions or replacements do not deviate from the gist of the present invention, and should also belong to the protection scope of the claims of the present invention.

Claims (9)

1. a kind of high rate filter backwash energy saver, it is characterised in that: including multiple high rate filters, backwash water inlet start and stop control System processed and backwash are discharged total motor-driven valve, and each high rate filter is provided with filtered water inlet motor-driven valve, filtering water outlet Motor-driven valve, backwash water inlet motor-driven valve and backwash are discharged motor-driven valve, in which:

Backwash water inlet start-stop control system includes that intake total motor-driven valve, backwash water inlet of multifunctional water pump control valve, backwash is total Hand-operated valve and electromagnetic flowmeter, the backwash intake total motor-driven valve both ends respectively with the multifunctional water pump control valve go out The intake water inlet end of total hand-operated valve of water end (W.E.), backwash is connected, and the water inlet end and high water tank of the multifunctional water pump control valve supply Water pump is connected, and the backwash water outlet of total hand-operated valve that intakes is connected with the water inlet end of electromagnetic flowmeter, the electromagnetic current The water outlet of meter is connected with the backwash of high rate filter water inlet motor-driven valve；

The backwash is discharged total motor-driven valve and is arranged between the backwash water outlet motor-driven valve of high rate filter and cesspool, described each The backwash water outlet motor-driven valve of high rate filter is discharged total motor-driven valve with the backwash and is connected.

2. high rate filter backwash energy saver according to claim 1, it is characterised in that: each backwash water inlet electricity Dynamic valve is connected in parallel on backwash water inlet manifold, and the water inlet end of each backwash water inlet motor-driven valve is intake with the backwash General pipeline is connected, the water outlet of one end of backwash water inlet manifold connection electromagnetic flowmeter, the backwash water inlet manifold it is another One end sealed set.

3. high rate filter backwash energy saver according to claim 1, it is characterised in that: each backwash goes out water power Dynamic valve is connected in parallel on backwash outfall sewer, and the water outlet of each backwash water outlet motor-driven valve is discharged with the backwash General pipeline is connected, one end sealed set of the backwash outfall sewer, and the other end connection of the backwash outfall sewer is described anti- The water inlet end of the total motor-driven valve of water is washed out, the water outlet that the backwash is discharged total motor-driven valve is connected by sewage drainage pipe and cesspool It is logical.

4. high rate filter backwash energy saver according to claim 1, it is characterised in that: the high-level tank water pump It is normally opened, for supplying water to steel rolling production-line.

5. high rate filter backwash energy saver according to claim 1, it is characterised in that: the backwash energy saver is set It is equipped with the first PLC control module and the 2nd PLC control module, two groups of PLC control modules are used for co- controlling high-rate fitration The filter process and backwash process of device.

6. high rate filter backwash energy saver according to claim 5, it is characterised in that: the first PLC controls mould Block respectively with filtered water inlet motor-driven valve, filter out water motor-driven valve, backwash water inlet motor-driven valve, backwash water outlet motor-driven valve, backwash be discharged Total motor-driven valve electrical connection, wherein backwash water outlet motor-driven valve is discharged total motor-driven valve composition backwash and is discharged total motor-driven valve and follows with backwash is System, the 2nd PLC control module are electrically connected with the total motor-driven valve of backwash water inlet.

7. high rate filter backwash energy saver according to claim 1, it is characterised in that: the backwash water outlet is total electronic Valve system for tracking includes:

In the first PLC control module, each high rate filter backwash water outlet motor-driven valve reaches bit switch FC-ON automatically Connecting terminal is discharged the reaching a FC-ON connecting terminal automatically and be electrically connected of total motor-driven valve with backwash respectively；Each high speed mistake The automatic pass location switch FC-OFF connecting terminal of filter backwash water outlet motor-driven valve is discharged the automatic of total motor-driven valve with backwash respectively FC-OFF connecting terminal in place is closed to be electrically connected.

8. high rate filter backwash energy saver according to claim 1, it is characterised in that: the backwash water outlet is total electronic The travel switch time of valve is shorter than the travel switch time of the water outlet motor-driven valve of each high rate filter.

9. a kind of high rate filter backwash energy saver application method, it is characterised in that: using such as any one of claim 1-9 institute The high rate filter backwash energy saver stated, which comprises

S1: starting high-level tank water is pumped to high water tank and back washing device water supply, while the control of the first PLC control module is closed The filtered water inlet motor-driven valve of every high rate filter and filter out water motor-driven valve；

The control of S2: the two PLC control module opens backwash and intakes total motor-driven valve, while the control of the first PLC control module opens the The backwash water inlet motor-driven valve of one high rate filter and backwash are discharged motor-driven valve, and backwash is discharged total motor-driven valve and follows unlatching；

S3: the total hand-operated valve control flow of inlet water of backwash water inlet is manually adjusted, electromagnetic flowmeter registration is observed, when registration reaches separate unit When flow needed for high rate filter backwash, stop adjusting the total hand-operated valve of backwash water inlet, and the total hand-operated valve of fixed backwash water inlet；

S4: the total hand-operated valve control water flow of backwash water inlet is supplied water with flow needed for high rate filter backwash, and the first PLC controls mould Separate unit carries out backwash one by one for block and the 2nd PLC control module co- controlling high rate filter；

S5: after the completion of backwash, the 2nd PLC control module controls the total motor-driven valve 7 of backwash water inlet and closes, while the first PLC controls mould Block controls the backwash water inlet motor-driven valve of high rate filter and backwash water outlet motor-driven valve is closed, and backwash is discharged total motor-driven valve and follows pass It closes, forms bivalve sealing；

S6: the one PLC control module controls the filtered water inlet motor-driven valve of high rate filter and filters out water motor-driven valve opening, high Fast filter continues normal filtration work.