CN218248794U - Backwashing filtering system - Google Patents

Abstract

The utility model relates to a filtration system technical field specifically discloses backwash filtration system, including inlet tube, outlet pipe and Y type filter, the fluid inlet of inlet tube intercommunication Y type filter, the fluid outlet of outlet pipe intercommunication Y type filter, the outlet end that Y type filter was kept away from to the outlet pipe sets up the collector, still includes the bypass pipe, and the bypass pipe both ends communicate the fluid outlet of collector and Y type filter respectively, are equipped with the pump body and three-way valve A on the bypass pipe, and three-way valve A can communicate the end of intaking of collector and the pump body. This scheme is used for alleviating among the prior art and utilizes the liquid after filtering to carry out the problem that the solid impurity that the backwash exists is difficult to being washed away to the filter screen of Y type filter.

Description

Back flush filtration system

Technical Field

The utility model relates to a filtration system technical field, concretely relates to back flush filtration system.

Background

The treatment of the waste solvent is one of important links of a coating production line, and the link has the function of collecting and treating the waste solvent generated after each spraying station is cleaned so as to achieve the purposes of energy conservation and environmental protection. Because the spraying station needs to be cleaned manually or by a cleaning device in the cleaning process, the spraying station needs to be cleaned by cleaning cloth in the cleaning process, and the cleaning cloth is easy to lose or fall off and is treated together with a waste solvent in the cleaning process; in addition, part of small parts cleaned in the cleaning process are easy to loosen and are treated together with the waste solvent; this causes the waste solvent to be accompanied by paint residues, cleaning cloth, metal small parts and other substances, and when the waste solvent is collected, the waste solvent is directly pumped into a corresponding storage container by adopting a diaphragm pump in a traditional mode. But because the cleaning cloth and the metal small parts contained in the waste solvent easily cause the damage of the diaphragm pump for pumping the waste solvent or the blockage of the pipeline, the waste solvent overflows to cause the problem of environmental pollution, and the environmental protection production of enterprises is greatly influenced.

In order to avoid the above problems, in the prior art, a filter with a filter screen is usually installed at the front end of a diaphragm pump, so that the filter can filter solid impurities such as paint residues, cleaning cloth, metal small parts and the like in a waste solvent, and the solid impurities can be prevented from entering the diaphragm pump, for example, the invention patent of chinese patent publication No. CN110860119a, "a Y-type filter capable of backwashing and rapidly discharging sewage", the Y-type filter has 3 mutually communicated ports (three ports are respectively a fluid inlet, a fluid outlet and a sewage outlet), the Y-type filter is internally provided with the filter screen, the filter screen is arranged at the connection position of the fluid inlet and the fluid outlet, when the Y-type filter is used for filtering the waste solvent, the waste solvent enters the Y-type filter from the fluid inlet of the Y-type filter, the solid impurities such as the paint residues, the cleaning cloth, the metal small parts and the like are left in the filter screen, and the liquid is discharged from the fluid outlet of the Y-type filter, so as to realize the filtering of the solid impurities, so that only the liquid filtered by the Y-type filter is pumped, and further, the damage of the solid impurities to the diaphragm pump can be reduced. In the case of pipeline blockage, the patent also discloses a method for avoiding the blockage of the Y-shaped filter, specifically: the liquid inlet of the Y-shaped filter is closed firstly, the liquid separated by the Y-shaped filter is utilized by utilizing the pump body, so that the liquid is pumped into the Y-shaped filter from the fluid outlet, the filter screen of the Y-shaped filter is washed in a reverse washing mode, under the reverse washing, the liquid pumped in from the fluid outlet pushes the solid impurities in the filter screen to be discharged from the sewage outlet of the Y-shaped filter, and the automatic washing of the filter screen is realized.

However, in the current mode, the solid impurities in the filter screen are still difficult to clean by the back-flushing liquid.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is providing back flush filtration system to alleviate the solid impurity that utilizes the liquid after filtering to carry out the backwash existence to the filter screen of Y type filter among the prior art and be difficult to by the problem that washes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the backwashing filter system comprises a water inlet pipe, a water outlet pipe and a Y-shaped filter, wherein the water inlet pipe is communicated with a fluid inlet of the Y-shaped filter, the water outlet pipe is communicated with a fluid outlet of the Y-shaped filter, a collector is arranged at a water outlet end of the water outlet pipe, which is far away from the Y-shaped filter, the backwashing filter system also comprises a bypass pipe, two ends of the bypass pipe are respectively communicated with the fluid outlets of the collector and the Y-shaped filter, a pump body and a three-way valve A are arranged on the bypass pipe, and the three-way valve A can be communicated with the water inlet ends of the collector and the pump body.

The principle and the advantages of the scheme are as follows: in practical application, when the system is used for filtering impurities of the waste solvent, the drain outlet of the Y-shaped filter is closed, so that the waste solvent enters along the water inlet pipe, then solid-liquid separation is realized on the Y-shaped filter, liquid in the waste solvent enters the collector along the water outlet pipe, and solid in the waste solvent stays on the filter screen of the Y-shaped filter; and when needs washed the filter screen, can close inlet tube and outlet pipe to open the drain of Y type filter, utilize three-way valve A to hold and the collector intercommunication with the intaking of the pump body, utilize the liquid that the collector was collected in order to come the backwash filter screen through the bypass pipe.

However, the problem that the filter screen is not washed cleanly and solid impurities still remain is still the same as the prior art. Through research, the liquid entering the collector not only contains liquid but also contains more solid particles capable of passing through the filter screen, and during reverse washing, the part of solid particles are also sent to wash the filter screen, so that the washing effect is poor, and after the recovered liquid is adopted for reverse washing for many times, the solid particles brought to the filter screen by the reverse washing are instead mixed between original solid impurities on the filter screen, the washing difficulty is increased, and the problem that the solid impurities on the filter screen are difficult to wash is brought; this scheme can be with the help of three-way valve A when facing this problem, with the external fresh solution that does not contain solid particle of remaining opening on the three-way valve A, no longer use the liquid of recovery when making the pump body backflush the filter screen, but adopt the solution that does not contain solid particle to wash, because of not containing solid particle in the solution, so the pressure loss of solution in pumping process reduces, the dynamics that solution assaulted solid impurity is bigger, so can greatly reduce the probability that solid impurity is difficult to washed on the filter screen.

Preferably, as an improvement, the system further comprises a first liquid level meter for detecting the liquid level of the inlet pipe.

Has the advantages that: through the setting of first level gauge, make things convenient for the staff in time to know the liquid level condition in the inlet tube, the staff can judge whether blocking phenomenon appears in Y type filter according to the liquid level condition of inlet tube, if the Y type filter appears blockking up, then the liquid level that first level gauge tested must be higher than the liquid level of the inlet tube of Y type filter normal during operation, then at this moment, then can recoil Y type filter to wash Y type filter.

Preferably, as an improvement, a three-way valve B is further disposed on the bypass pipe, and the three-way valve B can communicate the fluid outlet of the Y-shaped filter with the water outlet end of the pump body.

Has the advantages that: when the three-way valve B communicates the pump body with the fluid outlet of the Y-shaped filter, the whole system can carry out normal back flushing on the filter screen; when one end of the three-way valve B, which is communicated with the fluid outlet of the Y-shaped filter, is plugged by the three-way valve, the whole system can filter impurities of the waste solvent, and the filtered liquid cannot enter the pump body through the bypass pipe; and when the drain outlet of the Y-shaped filter can not be opened and too much liquid is in the collector, the remaining opening of the three-way valve B can be communicated with the water outlet end of the pump body, so that the pump body can pump the liquid in the collector into other collectors from the three-way valve B, and the problem caused by overflow due to the fact that the liquid cannot be discharged from the collector in time is solved.

Preferably, as an improvement, a second liquid level meter for detecting the liquid level of the collector is further included.

Has the advantages that: through the design of second level gauge, make things convenient for the staff in time to know the liquid level condition of collector, and then whether the rapid judgement need start the backwash mode to the filter screen or follow the three-way valve B pump-off with the liquid in the collector.

Preferably, as an improvement, the water inlet pipe and the water outlet pipe are both provided with valves.

Has the beneficial effects that: through the setting of valve, the fluid inflow of convenient inlet tube and outlet pipe is gone on and is blocked or is opened.

Preferably, as an improvement, still include the controller, the pump body, first level gauge, valve, three-way valve A and three-way valve B all are connected with the controller, and the controller detects liquid level data according to first level gauge, the opening and close of control valve, the channel switching of control three-way valve B and the opening and closing of control pump body.

Has the advantages that: through the setting of controller for the controller can be after first level gauge detects that the liquid level is higher than the system and sets for the numerical value, and the valve on inlet tube and the outlet pipe is closed earlier to the controller, controls three-way valve B and communicates pump body water outlet end and Y type filter fluid outlet, controls the pump body and starts again, and then realizes the automatic monitoring of liquid level and the automatic start back flush after monitoring the liquid level and surpassing the system setting value through the controller.

Preferably, as an improvement, the second liquid level meter is connected with the controller, and the controller controls the channel switching of the three-way valve a, the opening communication condition of the three-way valve B and the start and stop of the pump body according to liquid level data detected by the second liquid level meter.

Has the beneficial effects that: the controller is used for controlling the three-way valve A to be communicated with the water inlet end of the pump body and the collector, controlling the three-way valve B to be communicated with the water outlet end of the pump body and the residual opening of the three-way valve B and then controlling the pump body to start after the second liquid level meter detects that the liquid level is higher than the set numerical value of the system.

Preferably, as an improvement, a drain outlet of the Y-shaped filter is connected with a drain pipe, and the drain pipe is provided with a switch valve.

Has the advantages that: this scheme is through the setting of ooff valve on the blow off pipe, conveniently realizes closing and opening of drain through the ooff valve.

Preferably, as an improvement, a tee joint is connected to the fluid outlet of the Y-shaped filter, and the tee joint communicates the water outlet pipe and the bypass pipe.

Has the beneficial effects that: the water outlet pipe and the bypass pipe are conveniently communicated with the fluid outlet of the Y-shaped filter through the three-way joint.

Preferably, as a modification, one end of the sewage draining pipe, which is far away from the Y-shaped filter, is provided with a storage container, and one port of the three-way valve B is communicated with the storage container.

Has the advantages that: when the liquid in the collector is too much, the three-way valve B is communicated with the storage container and the water outlet end of the pump body, so that the pump body can timely transfer the liquid in the collector into the storage container, the liquid in the collector is prevented from overflowing, meanwhile, the storage container can also be used for storing solid impurities in the waste solvent discharged from the sewage draining outlet, and the utilization rate of the storage container is improved.

Preferably, as an improvement, the bottom of the collector is provided with a discharge port, the discharge port is connected with a discharge pipe, and the discharge pipe is provided with a gate valve.

Has the advantages that: the discharge port and the discharge pipe with the gate valve are arranged at the bottom of the collector, so that when the collector needs to be cleaned or the solids deposited at the bottom of the collector need to be discharged, the gate valve can be directly opened, and the operation is simple and convenient.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a water inlet pipe 1, a first liquid level meter 2, a Y-shaped filter 3, a filter screen 3.1, a three-way valve B4, a pump body 5, a three-way valve A6, a collector 7, a water outlet pipe 8, a sewage discharge pipe 9, a second liquid level meter 10 and a gate valve 11.

The embodiment is basically as shown in figure 1, the backwashing filter system comprises a water inlet pipe 1, a water outlet pipe 8, a bypass pipe, a sewage discharge pipe 9 and a Y-shaped filter 3,Y type filter 3 with a fluid inlet, a fluid outlet and a sewage discharge outlet, wherein a metal filter screen 3.1 is arranged in the Y-shaped filter 3, the filter screen 3.1 is arranged at the connection position of the fluid inlet and the fluid outlet, and a tee joint is fixed on the fluid outlet of the Y-shaped filter 3; the inlet tube 1 communicates the fluid inlet of the Y-shaped filter 3, the remaining two joints of the three-way joint communicate the water outlet tube 8 and the bypass tube respectively, the drain pipe 9 is connected at the drain outlet of the Y-shaped filter 3, and the end of the drain pipe 9 far away from the drain outlet is communicated with the storage tank.

All install the valve on inlet tube 1 and the outlet pipe 8, install the ooff valve on the blow off pipe 9, valve and ooff valve all adopt the automatic valve of two-way in this embodiment, if two-way gas control valve.

The water outlet end of the water outlet pipe 8, which is far away from the three-way joint, is provided with a collector 7.

One end of a bypass pipe is communicated with a three-way joint, the other end of the bypass pipe is communicated with a collector 7, a pump body 5, a three-way valve A6 and a three-way valve B4 are arranged on the bypass pipe, the three-way valve A6 can be communicated with the collector 7 and the water inlet end of the pump body 5, the rest port of the three-way valve A6 can be connected with an external transportation pipeline, and the external transportation pipeline can input a solution without solids; the three-way valve B4 can be communicated with the three-way joint and the water outlet end of the pump body 5, the rest port of the three-way valve B4 can be connected with a delivery pipeline, and the other end of the delivery pipeline is communicated with the storage tank. In this embodiment, the three-way valve A6 and the three-way valve B4 are both three-way automatic valves, such as three-way pneumatic control valves. In this embodiment, the pump body 5 is a diaphragm pump.

Install the first level gauge 2 that is used for detecting inlet tube 1 liquid level on the inlet tube 1, install the second level gauge 10 that is used for detecting 7 liquid level height of collector on the collector 7. The bottom of the collector 7 is provided with a discharge port which is connected with a discharge pipe, and the discharge pipe is provided with a gate valve 11. In the present embodiment, the first liquid level meter 2 and the second liquid level meter 10 are both static pressure type liquid level meters.

The specific implementation process is as follows:

this system is when carrying out the impurity filtration of useless solvent, and the valve of inlet tube 1 and outlet pipe 8 is opened, and the ooff valve is closed with pump body 5, and the useless solvent that comes from the spraying station and relies on gravity to get into inlet tube 1 and pass through first level gauge 2, Y type filter 3, three way connection and outlet pipe 8 in proper order, flows into collector 7 at last, and in this process, the solid impurity among the useless solvent stays in the filter screen 3.1 of Y type filter 3. This process may be referred to as a contaminant filtration mode.

In order to realize multiple times of back flushing of the Y-shaped filter 3, the Y-shaped filter 3 can be regularly back flushed, during back flushing, a switch valve on a drain pipe 9 is opened, a three-way valve A6 is communicated with a collector 7 and a water inlet end of a pump body 5, a three-way valve B4 is communicated with a water outlet end of the pump body 5 and a three-way connector, finally, the pump body 5 is started through re-control, liquid collected in the collector 7 is further reversely flushed to a filter screen 3.1 of the Y-shaped filter 3 along a bypass pipe and the three-way connector, so that solid impurities on the filter screen 3.1 are discharged from the drain pipe 9, the mode is called as a regular back flushing mode, and after flushing is finished, the system returns to an impurity filtering mode.

Because the liquid adopted in the back flushing mode is the liquid obtained by filtering the waste solvent, the liquid contains more solid particles, the existence of the particles can increase the pressure loss in the pumping process and reduce the flushing capacity of the liquid on the filter screen 3.1 on the one hand, and on the other hand, the solid particles are also easily mixed among solid impurities, the flushing difficulty of the filter screen 3.1 is increased, the Y-shaped filter 3 is gradually blocked to lose the filtering function, and after the filter screen 3.1 is blocked, the liquid level of the water inlet pipe 1 quickly rises and breaks through the preset value of the system; at this moment, after the liquid level of the water inlet pipe 1 is monitored by the first liquid level meter 2 to exceed a preset value, a filter screen blockage flushing mode can be started, in the mode, a switch valve on the drain pipe 9 is opened, the three-way valve A6 is communicated with the water inlet end of the external conveying pipeline and the pump body 5, the three-way valve B4 is communicated with the water outlet end of the pump body 5 and the three-way connector, finally, the pump body 5 is started, and then the solution which does not contain solid and flows through the external conveying pipeline reversely flushes to the filter screen 3.1 of the Y-shaped filter 3 along the bypass pipe and the three-way connector, so that the solid impurities on the filter screen 3.1 are discharged from the drain pipe 9, and in the mode, the solution which does not contain the solid and is pumped by the pump body 5, the impact force of the solution on the filter screen 3.1 is larger, the solid impurities blocked on the filter screen 3.1 can be flushed away, and the problem that the filter screen 3.1 is blocked due to the solid impurities are difficult to be flushed away is solved. And after the filter screen blockage washing mode is finished, the system returns to the impurity filtering mode.

In addition, when the liquid in the collector 7 is monitored by the second liquid level meter 10 to exceed the preset value, the switch valve of the drain pipe 9 is firstly opened, the three-way valve A6 is communicated with the water inlet end of the pump body 5 and the collector 7, the three-way valve B4 is communicated with the water outlet end of the pump body 5 and the three-way joint, and then the pump body 5 is started, so that the pump body 5 pumps the liquid in the collector 7 to the fluid outlet of the Y-shaped filter 3 along the bypass pipeline and the three-way joint, which is equivalent to that the liquid in the collector 7 is timely discharged from the drain pipe 9 by utilizing a backflushing mode, and the filter screen 3.1 is cleaned by the way in the discharging process. However, if the switch valve of the drainage pipe 9 fails and cannot be opened, the three-way valve B4 is switched to the water outlet end of the pump body 5 to be communicated with the delivery pipeline, so that the pump body 5 can conveniently discharge the liquid in the collector 7 to the storage tank from the delivery pipeline in time. After the liquid level in the collector 7 has dropped, the system returns to the impurity filtration mode.

Example two

Embodiment two has further improved on the basis of embodiment one, specifically do, still include the controller, the pump body 5, first level gauge 2, second level gauge 10, the valve, the ooff valve, three-way valve A6 and three-way valve B4 all are connected with the controller, the controller detects the liquid level data that liquid level data and second level gauge 10 detected according to first level gauge 2, the opening and closing of control valve and ooff valve, the passageway of control three-way valve A6 switches, the passageway of control three-way valve B4 switches and control opening and shutting of pump body 5.

Specifically, the controller is used for controlling the valves on the water inlet pipe 1 and the water outlet pipe 8 to be closed and controlling the three-way valve B4 to communicate the water outlet end of the pump body 5 with the three-way joint after the first liquid level meter 2 detects that the liquid level is higher than a system set value (also called a preset value), and then controlling the pump body 5 to be started, thereby realizing automatic monitoring of the liquid level of the water inlet pipe 1 through the controller and automatic starting of back flushing after monitoring that the liquid level exceeds the system set value.

The controller is used for controlling the three-way valve A6 to be communicated with the water inlet end of the pump body 5 and the collector 7 and controlling the three-way valve B4 to be communicated with the water outlet end of the pump body 5 and the residual opening of the three-way valve B4 after the second liquid level meter 10 detects that the liquid level is higher than the set value of the system, then controlling the pump body 5 to be started, and finally enabling the liquid in the collector 7 to enter the storage tank through the three-way valve A6, the pump body 5, the three-way valve B4 and the delivery pipeline after the pump body 5 is started.

Compared with the first embodiment, the automatic degree of the backwashing filter system is improved.

The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (10)

1. Back flush filtration system, including inlet tube, outlet pipe and Y type filter, the fluid inlet of inlet tube intercommunication Y type filter, the fluid export of outlet pipe intercommunication Y type filter, the outlet pipe is kept away from the play water end of Y type filter and is set up collector, its characterized in that: the device further comprises a bypass pipe, two ends of the bypass pipe are respectively communicated with the fluid outlets of the collector and the Y-shaped filter, a pump body and a three-way valve A are arranged on the bypass pipe, and the three-way valve A can be communicated with the water inlet ends of the collector and the pump body.

2. The backwash filter system as in claim 1, wherein: the liquid level meter also comprises a first liquid level meter for detecting the liquid level of the water inlet pipe.

3. The backwash filter system as defined in claim 2, wherein: and the bypass pipe is also provided with a three-way valve B which can communicate the fluid outlet of the Y-shaped filter with the water outlet end of the pump body.

4. The backwash filter system as in claim 3, wherein: a second level gauge for detecting the collector level is also included.

5. The backwash filter system as in claim 4, wherein: and valves are arranged on the water inlet pipe and the water outlet pipe.

6. The backwash filter system as in claim 5, wherein: the liquid level detection device comprises a pump body, a first liquid level meter, a valve, a three-way valve A and a three-way valve B, and is characterized by further comprising a controller, wherein the pump body, the first liquid level meter, the valve, the three-way valve A and the three-way valve B are all connected with the controller, the controller detects liquid level data according to the first liquid level meter, and controls opening and closing of the valve, channel switching of the three-way valve B and opening and closing of the pump body.

7. The backwash filter system as in claim 6, wherein: the second liquid level meter is connected with the controller, and the controller controls the channel switching of the three-way valve A, the opening communication condition of the three-way valve B and the start and stop of the pump body according to liquid level data detected by the second liquid level meter.

8. The backwash filter system as in any one of claims 1-7, wherein: and a drain outlet of the Y-shaped filter is connected with a drain pipe, and a switch valve is arranged on the drain pipe.

9. The backwash filter system as defined in any one of claims 1 to 7, wherein: and a fluid outlet of the Y-shaped filter is connected with a three-way joint which is communicated with the water outlet pipe and the bypass pipe.

10. The backwash filter system as in any one of claims 1-7, wherein: the bottom of the collector is provided with a discharge port, the discharge port is connected with a discharge pipe, and the discharge pipe is provided with a gate valve.

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