CN109368837B - Energy-saving micro-filtration system - Google Patents

Abstract

The invention provides an energy-saving micro-filtration system, which relates to the technical field of water treatment, and comprises: the device comprises a liquid inlet main pipe, liquid inlet branch pipes, a micro-filtration device, a sewage main pipe, a liquid outlet main pipe and a control device; the micro-filtration device comprises a micro-filtration tank, a sedimentation funnel, a sand-water separation device and an air supply device; through the setting of feed liquor house steward and a plurality of feed liquor branch pipe, carry out liquid transport to many sets of microfiltration device, make many sets of microfiltration device use in parallel, filth in the microfiltration jar is discharged through sedimentation funnel, air feeder carries gas in to the microfiltration jar, make the filter material in the filter layer float, enter into sedimentation funnel with the filth that adheres to in the filter material, discharge through sedimentation funnel, the filter material in the sand-water separator's setting avoids the filter material to enter into in the sedimentation funnel, avoid the waste of filter material, the realization improves water treatment efficiency, and the cost is lower, circulated use time is long, need not shut down the maintenance, be applicable to the technological effect of large-traffic water treatment.

Description

Energy-saving micro-filtration system

Technical Field

The invention relates to the technical field of water treatment, in particular to an energy-saving micro-filtration system.

Background

In the sewage treatment field, a plurality of technical bottlenecks exist for a long time, and due to the existence of the technical bottlenecks, a part of sewage treatment plants have the current situation that the technology is difficult to reach the standard after the technology is lagged, the practical technical improvement faces the obstacle of high investment or high operation cost, under the situation of increasingly strict sewage treatment, the technical bottlenecks are overcome under the situation that the treatment index is continuously improved, and the introduction of new technology in the sewage treatment technology is a general requirement in the industry.

The traditional sand filtration is difficult to reach the standard stably, meanwhile, the electricity consumption and water consumption are large during backwashing, the membrane filtration can reach the standard stably, and the membrane system can ensure that the indexes of the effluent suspended matters are qualified.

However, the investment and the operation cost of the membrane system are high, and the technical bottleneck of the membrane is flow attenuation along with the use time; in order to meet the standard of suspended matters, a cartridge filter is generally arranged in front of a membrane system, but is easy to block, and the frequent situation is that the cartridge filter is blocked to cause difficult water production, so that the system has to be stopped for maintenance; the membrane system needs to be repeatedly invested in replacement of the membrane component at regular intervals, and daily work also needs to be washed by offline shutdown medicaments, so that the working efficiency is affected.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide an energy-saving micro-filtration system so as to solve the technical problems that in the prior art, the membrane system has higher investment and running cost for treating water, the filtration is easy to block, the shutdown is needed for maintenance, and the working efficiency is influenced.

The invention provides an energy-saving micro-filtration system, comprising: the device comprises a liquid inlet main pipe, a liquid inlet branch pipe, a micro-filtration device, a sewage main pipe, a liquid outlet main pipe and a control device; the liquid inlet branch pipes and the micro-filtration devices are all provided with a plurality of micro-filtration devices, the liquid enters the micro-filtration devices through the liquid inlet branch pipes and the liquid inlet main pipes, the micro-filtration devices are connected with the sewage main pipes and the liquid outlet main pipes, the micro-filtration devices are used for treating the liquid, and sewage and clean water generated after the liquid is treated are discharged through the sewage main pipes and the liquid outlet main pipes respectively; the micro-filtration device comprises a micro-filtration tank, a sedimentation funnel, a sand-water separation device and an air supply device; the micro-filtration tank is respectively communicated with the liquid inlet branch pipe, the sewage main pipe and the liquid outlet main pipe, the sedimentation funnel is arranged in the micro-filtration tank, and the sedimentation funnel is communicated with the sewage main pipe; the filter layer is arranged in the micro-filtration tank, the spray pipe is arranged in the filter layer, the air supply device is communicated with the spray pipe, the air supply device conveys air into the micro-filtration tank through the spray pipe, and the sand-water separation device is connected with the top of the sedimentation funnel so as to prevent filter materials in the filter layer from entering the sedimentation funnel.

Further, a water inlet pump, a water quality detector and a flow detector are sequentially arranged on the liquid inlet header pipe along the liquid flowing direction; the water inlet pump, the water quality detector and the flow detector are all in signal connection with the control device, and the water quality detector and the flow detector are respectively used for detecting the water quality and the flow of the liquid in the liquid inlet main pipe and transmitting the water quality and the flow information to the control device.

Further, a manual regulating valve and an automatic water inlet valve for controlling the flow of liquid in the liquid inlet branch pipe are arranged on the liquid inlet branch pipe.

Further, the micro-filtration device also comprises a micro-filtration drain pipe; one end of the microfiltration blow-off pipe is communicated with the side wall of the microfiltration tank, the other end of the microfiltration blow-off pipe is communicated with the blow-off main pipe, and dirt in the microfiltration tank can enter the blow-off main pipe through the microfiltration blow-off pipe; the micro-filtration blow-down pipe is provided with a first automatic blow-down valve which is connected with the control device through signals.

Further, the grit-water separator includes a perforated plate and a support; the perforated plate sets up in the top of sedimentation funnel, and one side and the sedimentation funnel of supporting part are connected, and the opposite side and the perforated plate of supporting part are connected to support the perforated plate.

Further, the sedimentation funnel comprises a sewage drainage water collector and a check ring; the support part is connected with the outer surface of the sewage collector, the bottom of the sewage collector is communicated with the sewage main pipe through a sewage pipe, a second automatic sewage valve is arranged on the sewage pipe, and the second automatic sewage valve is in signal connection with the control device; the retaining ring sets up in the top of blowdown water collector, and the retaining ring is connected with the perforated plate, and retaining ring 32 is arranged in blocking filter material in the filtering layer from entering into blowdown water collector.

Further, the microfiltration device also comprises an exhaust pipeline; one end of the exhaust pipeline is connected with the top of the micro-filtration tank, and the other end of the exhaust pipeline is connected with the sewage main pipe; the exhaust pipeline is provided with an automatic switching valve and a flow switch in sequence along the liquid flow direction, the automatic switching valve and the flow switch are connected with a control device in a signal mode, gas in the micro-filtration tank is discharged through the exhaust pipeline, and the flow switch is used for detecting the liquid filling condition in the micro-filtration tank and transmitting the liquid filling information to the control device.

Further, the exhaust pipeline is provided with an exhaust branch in parallel; dirt in the micro-filtration tank can enter the sewage main pipe through an exhaust branch, and an exhaust valve is arranged on the exhaust branch and is in signal connection with the control device.

Further, the air supply device comprises an air compressor, an air storage tank and an air purifier; the air compressor, the air storage tank and the air purifier are sequentially arranged on the air supply pipeline, the air supply pipeline is communicated with the spray pipe, gas is stored in the air storage tank, the air compressor drives the gas in the air storage tank to enter the air purifier, the air purifier is used for purifying the gas, and the purified gas enters the micro-filtration tank through the air supply pipeline and the spray pipe.

Further, the air supply device also comprises an air source distributor; the air source distributor is arranged between the air supply pipeline and the spray pipe, the spray pipe comprises a first spray pipe and a second spray pipe, the first spray pipe and the second spray pipe are both arranged in the filter layer, the air source distributor is respectively communicated with the first spray pipe and the second spray pipe through the first air source distribution pipe and the second air source distribution pipe, and gas in the air supply pipeline enters the first spray pipe and the second spray pipe through the air source distributor.

Further, gas valves are arranged on the first gas source distributing pipe and the second gas source distributing pipe; the cross-sectional area of the gas valve is smaller than the cross-sectional area of the first gas supply distribution pipe.

Further, the air supply device also comprises an air source exhaust pipe; the air source exhaust pipe is communicated with the air source distributor, and air in the air source distributor can be exhausted through the air source exhaust pipe.

Further, the first air source distributing pipes are arranged in a plurality, and two ends of each of the first air source distributing pipes are communicated with the air source distributing pipes and the first spray pipes.

Further, the air supply pipeline is sequentially provided with an automatic total air valve and an automatic ball valve along the air flow direction; the second air source distributing pipe and the first air source distributing pipes are respectively provided with an automatic recoil valve, and the automatic main air valve, the automatic ball valve and the automatic recoil valves are respectively connected with the control device through signals.

Further, a back flushing pipeline is arranged between the micro-filtration tank and the liquid outlet main pipe; one end of the back flush pipeline is communicated with the bottom of the micro-filtration tank, the other end of the back flush pipeline is communicated with the liquid outlet main pipe, and liquid in the liquid outlet main pipe can enter the micro-filtration tank through the back flush pipeline, so that the liquid drives dirt in the micro-filtration tank to enter the sedimentation funnel.

Further, the micro-filtration device also comprises a forward washing pipeline; one end of the forward washing pipeline is communicated with the sewage main pipe, and the other end of the forward washing pipeline is communicated with the back washing pipeline, so that dirt in the micro-filtration tank can be discharged through the forward washing pipeline.

Further, the back flushing pipeline is sequentially provided with an automatic water outlet valve and a manual water outlet valve along the flowing direction of the liquid; the automatic forward washing valve is arranged on the forward washing pipeline, and the automatic water outlet valve and the automatic forward washing valve are connected with the control device through signals.

Further, a back flush detection pipeline is arranged between the back flush pipeline and the sewage main pipe; two ends of the back flush detection pipeline are respectively communicated with the sewage main pipe and the back flush pipeline; the backwash detection pipeline is sequentially provided with a detector control valve and a water outlet detector along the liquid flowing direction, and the detector control valve and the water outlet detector are both in signal connection with the control device.

Further, the micro-filtration device also comprises a pressure detection device; the pressure detection device is connected with the back flushing pipeline to detect the liquid pressure in the back flushing pipeline.

Further, an online flowmeter and an online monitor are arranged at the liquid outlet of the liquid outlet main pipe; the on-line flowmeter and the on-line monitor are sequentially arranged along the flow direction in the sewage main pipe.

Further, the filter material in the filter layer is set to be any one of microporous artificial sintered particles or volcanic particles; the diameter of the filter material particles in the filter layer is 0.5-3.0 mm.

Further, the microporous artificial sintering particles are composed of the following raw materials:

70-75% by weight of aluminum oxide;

20 to 25% by weight of silica.

By combining the technical scheme, the invention has the beneficial effects that:

The invention provides an energy-saving micro-filtration system, comprising: the device comprises a liquid inlet main pipe, liquid inlet branch pipes, a micro-filtration device, a sewage main pipe, a liquid outlet main pipe and a control device; the liquid inlet branch pipes and the micro-filtration devices are all provided with a plurality of micro-filtration devices, the liquid enters the micro-filtration devices through the liquid inlet branch pipes and the liquid inlet main pipes, the micro-filtration devices are connected with the sewage main pipes and the liquid outlet main pipes, the micro-filtration devices are used for treating the liquid, and sewage and clean water generated after the liquid is treated are discharged through the sewage main pipes and the liquid outlet main pipes respectively; the micro-filtration device comprises a micro-filtration tank, a sedimentation funnel, a sand-water separation device and an air supply device; the micro-filtration tank is respectively communicated with the liquid inlet branch pipe, the sewage main pipe and the liquid outlet main pipe, the sedimentation funnel is arranged in the micro-filtration tank, and the sedimentation funnel is communicated with the sewage main pipe; the filter layer is arranged in the micro-filtration tank, the spray pipe is arranged in the filter layer, the air supply device is communicated with the spray pipe, the air supply device conveys air into the micro-filtration tank through the spray pipe, and the sand-water separation device is connected with the top of the sedimentation funnel so as to prevent filter materials in the filter layer from entering the sedimentation funnel.

Through the setting of feed liquor house steward and a plurality of feed liquor branch pipe, carry out liquid transport to many sets of microfiltration device, make many sets of microfiltration device use in parallel, but many sets of microfiltration device each handle liquid, set up the sedimentation funnel in the microfiltration jar, make the filth in the microfiltration jar discharge through the sedimentation funnel, air feeder carries gas in the microfiltration jar, make the filter material in the filter layer float, enter into the sedimentation funnel with the filth that adheres to in the filter material, discharge through the sedimentation funnel, the filter material in the filter layer is avoided entering into the sedimentation funnel to sand water separator's setting, avoid the waste of filter material, and realized improving water treatment efficiency, and the cost is lower, circulated use time is long, need not shut down the maintenance, be applicable to the technological effect of large-traffic water treatment.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of an energy-saving micro-filtration system according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a settling hopper and a sand-water separator in the energy-saving micro-filtration system according to the embodiment of the invention;

Fig. 3 is a schematic structural diagram of a settling hopper and a sand-water separator in the energy-saving micro-filtration system according to the embodiment of the present invention at a first view angle;

Fig. 4 is a schematic structural diagram of a settling hopper and a sand-water separator in the energy-saving micro-filtration system according to the embodiment of the present invention at a second view angle.

Icon: 1-a manual regulating valve; 2-automatic water inlet valve; 3-a first automatic drain valve; 4-a settling hopper; 5-a micro-filtration tank; 6-automatic valve opening and closing; 7-a flow switch; 8-an exhaust valve; 9-a second automatic drain valve; 10-gas valve; 11-a filter layer; 12-an air source dispenser; 13-a multi-well plate; 14-a valve on the air source exhaust pipe; 15-an automatic ball valve; 16-automatic positive washing valve; 17-a manual water outlet valve; 18-an automatic water outlet valve; 19-a detector control valve; 20-a water outlet detector; 21-a gas storage tank; 22-an air compressor; 23-an air purifier; 24-a water quality detector; 25-flow detector; 26-a pressure gauge; 27-an online flow meter; 28-an on-line monitor; 29-pressure detecting means; 30-a pressure sensor; 31-a sewage draining and water collecting device; 32-check rings; 33-a support; 34-a water inlet pump; 35-a control device; 36-an automatic total air valve; 37-spraying pipe; 38-sand-water separation device; 100-liquid inlet main pipe; 110-a liquid inlet branch pipe; 120-microfiltration blow-down pipe; 130-an exhaust line; 131-an exhaust branch; 140-an air supply pipeline; 150-forward washing the pipeline; 160-back flushing pipeline; 170-back flushing detection pipelines; 180-blow-down pipe; 190-a first gas source distribution pipe; 191-a second air supply distribution tube; 200-a sewage main pipe; 300-liquid outlet header pipe.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.

In the description of the present invention, it should be noted that unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

FIG. 1 is a schematic diagram of the overall structure of an energy-saving micro-filtration system according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a settling hopper and a sand-water separator in the energy-saving micro-filtration system according to the embodiment of the invention; fig. 3 is a schematic structural diagram of a settling funnel and a sand separator in the energy-saving micro-filtration system according to the embodiment of the present invention at a first view angle, wherein the first view angle is a front view of the porous plate 13, and fig. 4 is a schematic structural diagram of the settling funnel and the sand separator in the energy-saving micro-filtration system according to the embodiment of the present invention at a second view angle, wherein the second view angle is a front view of the settling funnel 4.

As shown in fig. 1 to 4, the energy-saving micro-filtration system provided in this embodiment includes: a liquid inlet main pipe 100, a liquid inlet branch pipe 110, a micro-filtration device, a sewage main pipe 200, a liquid outlet main pipe 300 and a control device 35; the liquid inlet manifold 110 and the micro-filtration devices are provided with a plurality of micro-filtration devices, the plurality of micro-filtration devices are connected with the liquid inlet manifold 100 through the plurality of liquid inlet manifold 110, the liquid enters the plurality of micro-filtration devices through the liquid inlet manifold 100 and the plurality of liquid inlet manifold 110, the plurality of micro-filtration devices are connected with the sewage main 200 and the liquid outlet main 300, the micro-filtration devices are used for processing the liquid, and sewage and clean water generated after the liquid is processed are respectively discharged through the sewage main 200 and the liquid outlet main 300; the micro-filtration device comprises a micro-filtration tank 5, a sedimentation funnel 4, a sand-water separation device 38 and an air supply device; the micro-filtration tank 5 is respectively communicated with the liquid inlet branch pipe 110, the sewage main pipe 200 and the liquid outlet main pipe 300, the sedimentation funnel 4 is arranged in the micro-filtration tank 5, and the sedimentation funnel 4 is communicated with the sewage main pipe 200; the filter layer 11 is arranged in the micro-filtration tank 5, the spray pipe 37 is arranged in the filter layer 11, the air supply device is communicated with the spray pipe 37, the air supply device conveys air into the micro-filtration tank 5 through the spray pipe 37, and the sand-water separation device 38 is connected with the top of the sedimentation funnel 4 so as to prevent filter materials in the filter layer 11 from entering the sedimentation funnel 4.

Specifically, the liquid inlet main pipe 100 is communicated with the liquid inlet branch pipes 110, each liquid inlet branch pipe 110 is provided with a set of micro-filtration device, liquid enters the sets of micro-filtration devices through the liquid inlet main pipe 100 and the liquid inlet branch pipes 110, and the sets of micro-filtration devices can respectively operate, so that the working efficiency is improved, and the device is suitable for large-flow water treatment.

In the water treatment process, dirt is adsorbed by the filter material in the filter layer 11, after long-time water treatment, the filter material needs to be backwashed, the dirt adsorption capacity of the filter material is recovered, the air supply device is controlled by the control device 35 to convey air into the micro-filtration tank 5 through the spray pipe 37, the filter material in the filter layer 11 moves to the top of the micro-filtration tank 5, the dirt is brought into the sedimentation funnel 4, the dirt in the sedimentation funnel 4 is discharged through the sewage discharging main pipe 200, the sand-water separation device 38 is arranged at the top of the sedimentation funnel 4, the sand-water separation device 38 blocks the filter material, and the filter material is prevented from entering the sedimentation funnel 4 and is discharged together with the dirt.

The energy-saving micro-filtration system provided in this embodiment includes: a liquid inlet main pipe 100, a liquid inlet branch pipe 110, a micro-filtration device, a sewage main pipe 200, a liquid outlet main pipe 300 and a control device 35; the liquid inlet manifold 110 and the micro-filtration devices are provided with a plurality of micro-filtration devices, the plurality of micro-filtration devices are connected with the liquid inlet manifold 100 through the plurality of liquid inlet manifold 110, the liquid enters the plurality of micro-filtration devices through the liquid inlet manifold 100 and the plurality of liquid inlet manifold 110, the plurality of micro-filtration devices are connected with the sewage main 200 and the liquid outlet main 300, the micro-filtration devices are used for processing the liquid, and sewage and clean water generated after the liquid is processed are respectively discharged through the sewage main 200 and the liquid outlet main 300; the micro-filtration device comprises a micro-filtration tank 5, a sedimentation funnel 4, a sand-water separation device 38 and an air supply device; the micro-filtration tank 5 is respectively communicated with the liquid inlet branch pipe 110, the sewage main pipe 200 and the liquid outlet main pipe 300, the sedimentation funnel 4 is arranged in the micro-filtration tank 5, and the sedimentation funnel 4 is communicated with the sewage main pipe 200; the filter layer 11 is arranged in the micro-filtration tank 5, the spray pipe 37 is arranged in the filter layer 11, the air supply device is communicated with the spray pipe 37, the air supply device conveys air into the micro-filtration tank 5 through the spray pipe 37, and the sand-water separation device 38 is connected with the top of the sedimentation funnel 4 so as to prevent filter materials in the filter layer 11 from entering the sedimentation funnel 4. Through the arrangement of the liquid inlet main pipe 100 and the liquid inlet branch pipes 110, liquid is conveyed to the sets of micro-filtration devices, the sets of micro-filtration devices are used in parallel, the sets of micro-filtration devices can respectively treat liquid, the sedimentation hopper 4 is arranged in the micro-filtration tank 5, dirt in the micro-filtration tank 5 is discharged through the sedimentation hopper 4, the gas supply device conveys gas into the micro-filtration tank 5, filter materials in the filter layers 11 are floated, dirt attached to the filter materials enters the sedimentation hopper 4 and is discharged through the sedimentation hopper 4, the filter materials in the filter layers 11 are prevented from entering the sedimentation hopper 4 by the arrangement of the sand-water separator, the waste of the filter materials is avoided, the water treatment efficiency is improved, the cost is lower, the recycling time is long, the shutdown maintenance is not needed, and the device is suitable for the technical effect of large-flow water treatment.

On the basis of the above embodiment, further, the liquid inlet manifold 100 in the energy-saving micro-filtration system provided in this embodiment is sequentially provided with the water inlet pump 34, the water quality detector 24 and the flow detector 25 along the liquid flow direction; the water inlet pump 34, the water quality detector 24 and the flow detector 25 are all in signal connection with the control device 35, and the water quality detector 24 and the flow detector 25 are respectively used for detecting the water quality and the flow of the liquid in the liquid inlet manifold 100 and transmitting the water quality and the flow information to the control device 35.

Specifically, the water inlet pump 34, the water quality detector 24 and the flow detector 25 are arranged on the liquid inlet manifold 100, the water inlet pump 34, the water quality detector 24 and the flow detector 25 are sequentially arranged along the flowing direction of the liquid, the water inlet pump 34 enables the liquid in the liquid inlet manifold 100 to obtain kinetic energy, the liquid smoothly enters the micro-filtration tank 5 through the liquid inlet branch pipe 110, the water quality detector 24 detects the water quality of the liquid in the liquid inlet manifold 100 in real time, the flow detector 25 detects the total amount of the liquid entering the micro-filtration devices, and the water quality data and the flow data are transmitted to the control device 35, so that a user can observe relevant data of the liquid conveniently.

Further, a manual adjusting valve 1 and an automatic water inlet valve 2 for controlling the flow of the liquid in the liquid inlet branch pipe 110 are arranged on the liquid inlet branch pipe 110.

Specifically, each liquid inlet branch pipe 110 is provided with a manual adjusting valve 1 and an automatic water inlet valve 2, the automatic water inlet valve 2 is in signal connection with a control device 35, a worker can control the opening or closing of the automatic water inlet valve 2 through the control device 35, and the manual adjusting valve 1 is convenient for manually controlling the liquid on-off of the liquid inlet branch pipe 110.

Further, the microfiltration device further comprises a microfiltration drain 120; one end of the microfiltration blow-off pipe 120 is communicated with the side wall of the microfiltration tank 5, the other end is communicated with the blow-off main pipe 200, and dirt in the microfiltration tank 5 can enter the blow-off main pipe 200 through the microfiltration blow-off pipe 120; the micro-filtration drain pipe 120 is provided with a first automatic drain valve 3, and the first automatic drain valve 3 is in signal connection with the control device 35.

Specifically, the microfiltration drain pipe 120 is communicated with the microfiltration tank 5, liquid and dirt in the microfiltration tank 5 can be discharged through the microfiltration drain pipe 120, after a shutdown procedure is started, the liquid in the microfiltration tank 5 is discharged through the microfiltration drain pipe 120, so that the liquid level in the microfiltration tank 5 is the position of the liquid inlet branch pipe 110, the microfiltration drain pipe 120 is provided with the first automatic drain valve 3, the first automatic drain valve 3 is controlled by the control device 35, and the on-off of the microfiltration drain pipe 120 is conveniently controlled by a worker remotely.

The energy-saving micro-filtration system provided by the embodiment is convenient for a worker to control the work of the micro-filtration device by remotely controlling the water inlet pump 34, the water quality detector 24, the flow detector 25, the automatic water inlet valve 2 and the first automatic blow-off valve 3 through the control device 35.

Further, on the basis of the above embodiment, the sand-water separator in the energy-saving micro-filtration system provided in the present embodiment includes the porous plate 13 and the supporting portion 33; the porous plate 13 is disposed on top of the settling hopper 4, one side of the supporting part 33 is connected with the settling hopper 4, and the other side of the supporting part 33 is connected with the porous plate 13 to support the porous plate 13.

Further, the sedimentation funnel 4 comprises a blowdown water collector 31 and a retainer ring 32; the support part 33 is connected with the outer surface of the sewage collector 31, the bottom of the sewage collector 31 is communicated with the sewage main 200 through a sewage pipe 180, a second automatic sewage valve 9 is arranged on the sewage pipe 180, and the second automatic sewage valve 9 is in signal connection with the control device 35; the retaining ring 32 is arranged at the top of the blowdown water collector 31, the retaining ring 32 is connected with the porous plate 13, and the retaining ring 32 is used for blocking filter materials in the filter layer 11 from entering the blowdown water collector 31.

Specifically, the supporting portion 33 is provided as a pad, when the water flow containing the filter material rises upward, the porous plate 13 has a blocking effect, due to the effect of the supporting portion 33, a gap exists between the porous plate 13 and the outer wall of the sewage collector 31, and the gap is larger than the average diameter of the filter material, so that the filter material flows into the filter layer 11 again along the gap, the water inlet at the upper portion of the sewage collector 31 is provided with the retainer ring 32, the water flow is blocked up to this point, the flow rate is equal to zero, so that the filter material particles are also blocked, and further slide down the inclined plate on the outer surface of the sewage collector 31 by gravity to return to the filter layer 11, and the backwash water continues to rise horizontally and is collected into the sewage collector 31 through the multi-layer porous plate 13.

The porous plate 13 has a diameter of 10mm, which hardly causes resistance to water flow, and the porous plate 13 can smoothly pass through the porous plate, and the porous plate 13 has a diameter of 0.5-3 mm smaller than 10mm of the porous plate 13, but each layer can retain and block a part of the filter material due to the turbulence state in dynamic water flow, a plurality of layers of porous plates 13 are arranged, each layer retains and blocks a part of the filter material, all the filter material is retained due to the multiple blocking, and the blocked filter material returns to the filter layer 11 under the action of gravity due to the vertical installation of the porous plate 13.

From the analysis of the effect of intercepting filter materials, the smaller the aperture of the porous plate 13 is, the better the intercepting effect is, but the larger the resistance to water flow is, meanwhile, the porous plate 13 is easy to deform, and the aperture is determined as: the diameter of the pore diameter is 3-5 times the maximum particle diameter, for example, the diameter of the filter material is 3mm, and the pore diameter of the porous plate 13 is 10mm.

The more the number of layers of the pore plate is, the better the interception effect is, but the higher the cost is, the more the number of layers is related to the diameter of the tank body, the greater the diameter of the tank body is, the more the number of layers is, and the optimal range is: the maximum diameter of the sewage collector 31 is two thirds of the diameter of the tank body, and the optimal number of layers of the porous plate 13 is not less than 5.

In a limited space, the smaller the spacing of the porous plates 13, the better the trapping effect is, but the higher the cost is, and the test proves that: the spacing of the porous plates 13 should be 3-10 times, preferably 6 times, greater than the filter material diameter.

According to the energy-saving micro-filtration system provided by the embodiment, the filter material in water is effectively trapped in the micro-filtration tank 5 through the arrangement of the multi-layer porous plate 13, the supporting part 33 and the retainer ring 32, and dirt adsorbed in the filter material enters the sewage drainage water collector 31 along with water flow, so that the filter material has higher dirt adsorption capacity again.

Further, the micro-filtration device provided in this embodiment further includes an exhaust pipeline 130; one end of the exhaust pipeline 130 is connected with the top of the micro-filtration tank 5, and the other end of the exhaust pipeline 130 is connected with the sewage main 200; the exhaust pipeline 130 is provided with an automatic switch valve 6 and a flow switch 7 in sequence along the liquid flow direction, the automatic switch valve 6 and the flow switch 7 are connected with the control device 35 in a signal mode, gas in the micro-filtration tank 5 is discharged through the exhaust pipeline 130, and the flow switch 7 is used for detecting the liquid filling condition in the micro-filtration tank 5 and transmitting the liquid filling information into the control device 35.

Specifically, when the micro-filtration device is just started, the gas in the micro-filtration tank 5 needs to be discharged through the exhaust pipeline 130, the exhaust pipeline 130 is connected with the top of the micro-filtration tank 5, the liquid level is gradually increased in the water inlet process of the micro-filtration tank 5, the gas in the micro-filtration tank 5 is discharged through the exhaust pipeline 130 connected with the top of the micro-filtration tank 5, the flow switch 7 is arranged on the exhaust pipeline 130, when the flow switch 7 detects that the liquid exists in the exhaust pipeline 130, the gas in the micro-filtration tank 5 is completely discharged, the liquid in the micro-filtration tank 5 is filled, and the control device 35 controls the automatic switch valve 6 to be closed, so that the next procedure operation is performed.

The automatic switch valve 6 and the flow switch 7 are both in signal connection with the control device 35, the automatic switch valve 6 is controlled by the control device 35, a worker can conveniently and remotely control the automatic switch to control the on-off of the exhaust pipeline 130, a liquid signal in the exhaust pipeline 130 detected by the flow switch 7 is transmitted to the control device 35, and the worker can conveniently know the state in the exhaust pipeline 130.

A pressure gauge 26 is provided on the top of the micro canister 5, the pressure gauge 26 is connected to an exhaust line 130, and a pressure sensor 30 is provided in the exhaust line 130.

Further, the exhaust pipeline 130 is provided with an exhaust branch 131 in parallel; dirt in the micro-filtration tank 5 can enter the sewage main 200 through the exhaust branch 131, the exhaust branch 131 is provided with an exhaust valve 8, and the exhaust valve 8 is in signal connection with the control device 35.

Specifically, the filtering process is performed after the automatic switching valve 6 is closed, and the control device 35 controls the intermittent opening and closing of the exhaust valve 8 on the forward washing pipeline 150 for exhausting the gas possibly brought by the inlet water, so as to ensure that the water is always filled to the top of the tank body during the filtering operation.

According to the energy-saving micro-filtration system provided by the embodiment, through the arrangement of the flow switch 7, whether the exhaust pipeline 130 is provided with liquid or not is detected, when the flow switch 7 detects that the exhaust pipeline 130 is provided with liquid, the micro-filtration tank 5 is filled with liquid, a detection signal is emitted into the control device 35, and the staff can know the state of the exhaust pipeline 130 conveniently.

On the basis of the above embodiment, further, the air supply device in the energy-saving micro-filtration system provided in this embodiment includes an air compressor 22, an air storage tank 21 and an air purifier 23; the air compressor 22, the air storage tank 21 and the air purifier 23 are sequentially arranged on the air supply pipeline 140, the air supply pipeline 140 is communicated with the spray pipe 37, gas is stored in the air storage tank 21, the air compressor 22 drives the gas in the air storage tank 21 to enter the air purifier 23, the air purifier 23 is used for purifying the gas, and the purified gas enters the micro-filtration tank 5 through the air supply pipeline 140 and the spray pipe 37.

Specifically, the air compressor 22 makes the gas in the gas storage tank 21 have kinetic energy, so that the gas in the gas storage tank 21 enters the air purifier 23, and the air purifier 23 purifies the gas, thereby avoiding the pollution caused by the entry of impurities in the gas into the micro-filtration tank 5.

Further, the air supply device also comprises an air source distributor 12; the air source distributor 12 is arranged between the air supply pipeline 140 and the spray pipe 37, the spray pipe 37 comprises a first spray pipe and a second spray pipe, the first spray pipe and the second spray pipe are both arranged in the filter layer 11, the air source distributor 12 is respectively communicated with the first spray pipe and the second spray pipe through the first air source distribution pipe 190 and the second air source distribution pipe 191, and air in the air supply pipeline 140 enters the first spray pipe and the second spray pipe through the air source distributor 12.

Further, the first air distribution pipe 190 is provided in plural, and both ends of the plural first air distribution pipes 190 are communicated with the air source distributor 12 and the first nozzles.

Specifically, the gas purified by the air purifier 23 enters the gas source distributor 12, and the gas source distributor 12 is communicated with the first spray pipe and the second spray pipe through the first gas source distribution pipe 190 and the second gas source distribution pipe 191, so that the gas enters the micro-filtration tank 5, and the filter material in the filter layer 11 is driven to move towards the top end of the micro-filtration tank 5 along with water.

The gas source distributor 12 selectively discharges the gas through the first spray pipe or the second spray pipe, so that the filter materials in the filter layers 11 at different height positions move towards the top of the micro-filtration tank 5 along with the liquid.

Further, the first gas source distributing pipe 190 and the second gas source distributing pipe 191 are respectively provided with a gas valve 10; the cross-sectional area of the gas valve 10 is smaller than the cross-sectional area of the first gas supply distribution pipe 190.

Specifically, in order to reduce the manufacturing cost of the equipment system, cost reduction studies are performed on various valve installation modes applied in a large number in the system, including an electric valve and a pneumatic valve or a manual valve, and the traditional valve installation method on a pipeline is as follows: the valve caliber is consistent with the installation caliber, for example, a DN50 valve is required to be installed on a DN50 pipeline, but researches find that a plurality of working sites do not need to adopt the design, and the valve adopted for backflushing the compressed air of the micro-filtration tank 5 is the most, so that the use effects of the valves with the same diameter pipeline and different calibers are researched, a great amount of experimental comparison analysis is carried out, the following is a comparison test for reducing the valve caliber of a gas pipeline, and the ventilation effect after the valve caliber is reduced is tested:

Tests show that under the condition of keeping the pressure unchanged at 0.4Mpa, valves with different calibers are arranged on one gas pipeline, even if the caliber of the valve is reduced by 80% of the cross-sectional area, namely, the caliber of the valve is reduced from DN50mm to DN20mm, the measured ventilation total amount and the air pressure are basically unchanged without influencing the backwashing effect, so that the check shows that the cross-sectional area of the valve on the gas pipeline can be smaller than the cross-sectional area of the pipeline under the premise of unchanged air pressure, the reduced cross-sectional area is 75-90%, the optimal 80% of the valve is determined by the caliber size, the price is proportional to the caliber, and the caliber of the valve is reduced, namely, the purchase price is reduced.

The influence of different air pressures on reducing the aperture of a valve is tested, and the valve aperture which is reduced by 80% compared with the cross section area of a pipeline is taken as an example, namely, the main pipeline DN50mm, the valve aperture DN20mm and the passing air pressure of 0.1-0.6 Mpa, and the result shows that when the pressure is 0.3-0.6 Mpa, the ventilation and the pressure have no obvious change, the backwash effect is good, when the ventilation is reduced to 90% when the pressure is reduced to 0.2Mpa, the ventilation is reduced to 80% when the pressure is reduced to 0.1Mpa, the backwash effect is not as good as 0.3Mpa, therefore, the ideal air pressure is more than 0.3Mpa, and the higher the pressure is not the higher the ideal air pressure because of energy conservation, but is good, and therefore, the air pressure is optimally 0.4Mpa.

Further, the air supply device also comprises an air source exhaust pipe; the air source exhaust pipe is communicated with the air source distributor 12, and air in the air source distributor 12 can be exhausted through the air source exhaust pipe.

Specifically, the air source exhaust pipe is communicated with the air source distributor 12, and the air in the air source distributor 12 can be exhausted through the air source exhaust pipe.

Further, the gas supply line 140 is provided with an automatic total gas valve 36 and an automatic ball valve 15 in sequence along the gas flow direction; the second air source distributing pipe 191 and the first air source distributing pipes 190 are respectively provided with an automatic recoil valve, and the automatic main air valve 36, the automatic ball valve 15 and the automatic recoil valves are respectively connected with the control device 35 in a signal way.

Specifically, the automatic air valve 36 and the automatic ball valve 15 are arranged on the air supply pipeline 140, and are controlled by the control device 35, so that the on-off of the air supply pipeline 140 can be controlled remotely.

In the energy-saving micro-filtration system provided by the embodiment, gas is distributed into the first spray pipe and the second spray pipe through the gas source distributor 12, and the gas enters the micro-filtration tank 5 to drive the filter material in the filter layer 11 to move upwards; by making the cross-sectional area of the gas valve 10 on the first gas distribution pipe 190 and the second gas distribution pipe 191 smaller than the cross-sectional area of the first gas distribution pipe 190 and the second gas distribution pipe 191, the valve use cost is effectively reduced.

On the basis of the above embodiment, further, a back flushing pipeline 160 is arranged between the micro-filtration tank 5 and the liquid outlet main pipe 300 in the energy-saving micro-filtration system provided by the embodiment; one end of the back flush pipeline 160 is communicated with the bottom of the micro-filtration tank 5, the other end of the back flush pipeline 160 is communicated with the liquid outlet main pipe 300, and liquid in the liquid outlet main pipe 300 can enter the micro-filtration tank 5 through the back flush pipeline 160 so that the liquid drives dirt in the micro-filtration tank 5 to enter the sedimentation funnel 4.

Further, the microfiltration device further comprises a forward wash line 150; one end of the forward washing pipeline 150 is communicated with the sewage main 200, and the other end is communicated with the back washing pipeline 160, so that dirt in the micro-filtration tank 5 can be discharged through the forward washing pipeline 150.

Further, the back flushing pipeline 160 is provided with an automatic water outlet valve 18 and a manual water outlet valve 17 in sequence along the flowing direction of the liquid; the automatic forward washing valve 16 is arranged on the forward washing pipeline 150, and the automatic water outlet valve 18 and the automatic forward washing valve 16 are connected with the control device 35 in a signal mode.

Specifically, when the micro-filtration tank 5 is filled with water, the automatic forward-washing valve 16 on the drain branch is required to be opened, so that the filtered water directly enters the drain header 200 and is maintained for a set time, a small amount of dirt possibly remained between filter materials is discharged, the water quality is ensured, the process is called forward washing, the automatic forward-washing valve 16 is closed when the set time is reached, the automatic water outlet valve 18 and the manual water outlet valve 17 are simultaneously opened, the flow is regulated by the manual water outlet valve 17, and the filtered water is discharged through the water outlet header.

Because the capacity of absorbing dirt after the filter materials in the filter layer 11 are used for a long time is reduced, the filter materials need to be backwashed, all valves in the micro-filtration device are closed, only the first automatic blow-down valve 3 on the micro-filtration blow-down pipe 120, the second automatic blow-down valve 9 on the blow-down pipe 180 and the exhaust valve 8 on the exhaust branch 131 are opened, the water stored above the liquid inlet branch 110 is completely emptied, the water level is the same as the horizontal position of the liquid inlet branch 110, the automatic total air valve 36 and the automatic ball valve 15 are opened, then the automatic backflushing valves on the plurality of first air source distribution pipes 190 connected with the air source distributor 12 are sequentially opened, each automatic backflushing valve is kept for 2-60 seconds, optimally for 20 seconds after opening, and the automatic water outlet valve 18 on the back flushing pipeline 160 is opened when the last air injection is stopped, because the system consisting of the plurality of micro-filtration tanks 5 still works, therefore the pressure of the liquid outlet main 300 is used as a backwashed water source, the water is reversely fed through the automatic water outlet valve 18, and the floated dirt is discharged into the blow-down main 200 through the sedimentation funnel 4.

In the energy-saving micro-filtration system provided by the embodiment, the automatic forward-washing valve 16 on the sewage branch is opened in the early stage of water production, so that filtered water directly enters the sewage main pipe 200 to transport a small amount of sewage possibly remained between filter materials into the sewage main pipe 200, and the quality of the produced water is ensured; the pressure of the liquid outlet main pipe 300 is used as a backwashing water source, so that the cost is saved, and the normal operation of other micro-filtration devices is not influenced.

On the basis of the above embodiment, further, a backwash detection pipeline 170 is provided between the backwash pipeline 160 and the blowdown header 200 in the energy-saving micro-filtration system provided in this embodiment; two ends of the backwash detection pipeline 170 are respectively communicated with the sewage main pipe 200 and the backwash pipeline 160; the backwash detection pipeline 170 is provided with a detector control valve 19 and a water outlet detector 20 in sequence along the liquid flow direction, and the detector control valve 19 and the water outlet detector 20 are both connected with the control device 35 by signals.

Specifically, the backwash detection pipeline 170 is provided with a detector control valve 19 and a water outlet detector 20, when the detector control valve 19 is opened, the liquid in the backwash pipeline 160 flows into the backwash detection pipeline 170, and the water outlet detector 20 detects the liquid quality in the backwash detection pipeline 170 and sends the liquid quality to the control device 35 for the staff to check.

Further, the micro-filtration device further comprises a pressure detection device 29; the pressure detecting device 29 is connected to the backwash line 160 to detect the liquid pressure in the backwash line 160.

Specifically, the pressure detecting device 29 is connected to the back flushing pipeline 160, and detects the liquid pressure in the back flushing pipeline 160 in real time, in addition, the pressure detecting device 29 may be connected to the control device 35 in a signal manner, and transmits the detected pressure information to the control device 35 for the operator to check.

Further, an online flowmeter 27 and an online monitor 28 are arranged at the liquid outlet of the liquid outlet main pipe 300; the in-line flow meter 27 and the in-line monitor 28 are disposed in sequence along the flow direction within the trapway 200.

Specifically, the online flowmeter 27 and the online monitor 28 are arranged on the liquid outlet main pipe 300, so that the liquid quality and the liquid flow in the liquid outlet main pipe 300 are detected in real time, and the online flowmeter 27 and the online monitor 28 can be connected with the control device 35 in a signal manner, and the detected relevant data information is transmitted to the control device 35 for being checked by staff.

The energy-saving micro-filtration system provided by the embodiment detects the liquid pressure in the back flush pipeline 160 through the pressure detection device 29, detects the liquid quality in the back flush detection pipeline 170 through the water outlet detector 20, and detects the liquid quality and the liquid flow in the liquid outlet main pipe 300 through the online flowmeter 27 and the online monitor 28, thereby achieving the technical effect of intelligent control.

On the basis of the above embodiment, further, the filter material in the filter layer 11 in the energy-saving micro-filtration system provided in this embodiment is set to be any one of microporous artificial sintered particles or volcanic particles; the diameter of the filter material particles in the filter layer 11 is in the range of 0.5-3.0 mm.

Further, the microporous artificial sintering particles are composed of the following raw materials:

70-75% by weight of aluminum oxide;

20 to 25% by weight of silica.

Specifically, microporous artificial sintered particles are used as a filter material, or volcanic rock particles are used as a filter material, the particle size range is 0.5-3.0 mm, and the optimal specific gravity range is 0.6-2.0 m: 1.2-2 g/cm ³, optimally 1.1-1.2 g/cm ³, the height of the filter layer 11 is more than 2 meters, optimally 2.5 meters, the working pressure is 0.05-0.5 Mpa, optimally 0.2Mpa, under the element condition, the high-precision filtering effect can be realized, the high-precision filtering device can be used for a sewage treatment terminal, suspended matters can reach less than 5mg/L, and the turbidity can reach less than 0.3NTU. The method can replace a membrane technology process route in the range, if the pretreatment technology is proper, the minimum suspended matters can reach 0.8mg/L, the sludge index can reach less than 3, and the requirement of entering reverse osmosis technology is met.

The manually sintered microporous filter material is preferably 70-75% alumina and 20-25% silica, and has the lowest sintering temperature and optimal porosity. And the comprehensive cost performance is optimal.

The microporous ceramic particle filter material can also be mixed with other filter materials, for example, activated carbon particles, so as to filter suspended matters and reduce ammonia nitrogen and heavy metals.

In the energy-saving micro-filtration system provided by the embodiment, the filter material in the filter layer 11 is set to be any one of microporous artificial sintered particles or volcanic particles; the diameter of the filter material particles in the filter layer 11 is 0.5-3.0 mm, so that the dirt adsorption capacity is effectively improved, and the water quality after filtration is ensured.

The whole working process is as follows:

the working process is described by a first path of equipment system, a second path, a third path and an N path, wherein the N paths are the same and run independently.

When the system is stopped, all valves are in a closed state, after the system is started, the on-line monitor 28 and the on-line flowmeter 27 respectively detect water quality and flow on line, and when the water quality and the flow exceeds the set values, the automatic water inlet valve 2 is automatically closed to stop water inlet and alarm.

A starting-up procedure: opening a manual regulating valve 1 and an automatic water inlet valve 2, regulating the manual regulating valve 1 to regulate the flow, and allowing the inlet water to enter the micro-filtration tank 5 through a liquid inlet branch pipe 110; the automatic switching valve 6 is opened, and as the inlet water gradually fills the tank, gas is gradually discharged through the automatic switching valve 6, when water flow passes through the automatic switching valve 6, the gas is completely discharged, and the water flow passes through the flow switch 7 to give a next program signal.

The flow switch 7 gives a next program signal to cause the automatic switch valve 6 to close, while the exhaust valve 8 is intermittently opened and closed according to a set time period, for example, every 60 minutes for 10 seconds, and then closed to enter a next time delay program for exhausting gas possibly brought by the inlet water, thereby ensuring that the water is always filled to the top of the tank body during the filtering operation.

The flow switch 7 gives the next program signal and opens the automatic forward washing valve 16 so that the filtered water directly enters the sewer main 200 and is maintained for a set time to drain out a small amount of dirt which may remain between the filter materials, ensuring the quality of the produced water thereafter, this process is called forward washing, the automatic forward washing valve 16 is closed for the set time, and the automatic outlet valve 18 is opened, and the flow is regulated by the manual outlet valve 17.

The filtered produced water is collected into a water outlet main pipe through an online flowmeter 27 and an online monitor 28, the online monitor 28 can be a turbidity meter or other detection equipment, and the alarm is automatically stopped when the set value is exceeded, so that unqualified produced water is prevented from entering the water outlet main pipe.

The flow switch 7 gives a next program signal which causes the valve 14 on the gas supply exhaust to open in order to exhaust the gas which may be present in the line. Simultaneously, a plurality of different backwashing programs are started due to the action of the flow switch 7, and the air compressor 22 reaches the set pressure after being started and automatically stops, and then the system starts to work normally.

The flow switch 7 gives the next program signal, starts the on-line monitoring device, alarms or stops automatically when the set data is exceeded, and starts the on-line monitoring device comprising an inflow water quality detector 24, a flow detector 25, an outflow on-line flowmeter 27, an on-line monitoring device 28 and a pressure detection device 29.

Back flushing procedure: during the filtration operation of the microfiltration system, more and more dirt is trapped over time, which can lead to a decrease in flow, and therefore different backwash procedures need to be initiated in order to restore to normal operation. The system adopts time setting, and starts different back flushing programs according to the delay period.

The flow switch 7 gives a next program signal, the second automatic blowdown valve 9 for blowdown is periodically opened and closed (generally for 15-20 seconds after being opened), the dirt trapped on the upper part of the filter material is discharged, the concentration multiple of the trapped dirt is reduced, the shutdown backwash cycle is prolonged advantageously, when the second automatic blowdown valve 9 is opened, the automatic water inlet valve 2 is not closed, the aim is to maintain the pressure, and the opening time is short, so that the working pressure is also maintained. The intermittent instant sewage discharge mode can effectively delay the blocking of the trapped sewage on the surface of the filter layer 11, and is beneficial to keeping the flow of the micro-filtration tank 5 stable.

The flow switch 7 gives a next program signal, starts a backwashing delay program, starts a first backwashing program after continuously working to a set delay, the first backwashing program belongs to short-time flushing in working, aims to prolong the normal working time of the micro-filtration tank 5, smoothly transits to a second backwashing period, and sets the first backwashing program period according to the turbidity of the inlet water.

The method comprises the following steps: executing a shutdown program, closing all valves, starting a programmable internal delay, opening the first automatic blow-off valve 3 and the second automatic blow-off valve 9 and the exhaust valve 8, as the valves are opened, completely emptying the water stored above the liquid inlet branch pipe 110, enabling the water level to be the same as the horizontal position of the liquid inlet branch pipe 110, delaying to reach a set value, closing the valves 3 and 14, opening the valves 36 and 15, opening the valves 10 for a few seconds (2-20 seconds), stopping for a few seconds (2-20 seconds), repeating the steps for a plurality of times, and aiming at floating the dirt accumulated above the spray pipe 37 upwards, opening the automatic water outlet valve 18 while stopping the last air injection, and using the pressure of a water outlet manifold as a backwash water source, reversely feeding water through the automatic water outlet valve 18, discharging the floated dirt outside through the sedimentation hopper 4 until the delay is completed. Thereafter, a reboot procedure is entered.

As the embedded height of the spray pipe 37 is only one third of the height below the surface of the filter layer 11, the height of the filter layer 11 below two thirds of the height of the spray pipe 37 does not need backflushing, and the normal filtering working state is maintained, namely, the layered backflushing mode is adopted this time, the mode is shorter than the integral flushing time, the phenomenon that the dirt on the filter layer 11 is increased first is adapted, and the back flushing mode for quick backflushing recovery is realized.

The flow switch 7 gives a next program signal to start a backwashing delay program, namely, after continuously working to set delay, a second backwashing program is started, the delay period of the second backwashing program is higher than that of the first backwashing program, and all other delay programs give way to the program, namely, when the program is started, the other backwashing delay programs are reset to zero. Belongs to thorough cleaning for completely recovering design parameters.

The method comprises the following steps: executing a shutdown program, closing all valves, starting a programmable internal delay, opening the first automatic blow-off valve 3 and the second automatic blow-off valve 9 and the exhaust valve 8, opening the valves, completely exhausting the stored water above the liquid inlet branch pipe 110, opening the automatic total air valve 36 and the automatic ball valve 15 at the same water level as the liquid inlet branch pipe 110, closing the valve 14 on the air source exhaust pipe, sequentially opening the automatic recoil valves on the plurality of first air source distribution pipes 190, keeping 2-60 seconds after each automatic recoil valve is opened, optimally 20 seconds, opening the automatic water outlet valve 18 while stopping the last air injection, and using the pressure of the liquid outlet manifold 300 as a backwashing water source, reversely feeding water through the automatic water outlet valve 18, discharging the floated dirt outside through the sedimentation hopper 4 until the delay is completed by the delay. Thereafter, a re-entry boot procedure is entered.

Normal shutdown procedure: the normal shutdown program is started by manually pressing a shutdown program button, the automatic water outlet valve 18 is closed first, and the closed automatic water outlet valve 18 has an internal contact, so that a next signal is given to close the automatic water inlet valve 2 for inlet water, and the sequential mode is adopted to fill the tank with water, so that the water outlet program can be conveniently entered more quickly when the tank is opened next time than when the tank is empty. The internal contacts are such that all valves are in the closed state after the automatic inlet valve 2 is closed. The air compressor 22 is in a powered-off state.

Abnormal shutdown procedure: the abnormal shutdown procedure refers to: since the data detected by the various detection sensors reaches the shutdown instruction issued by the setting data, it is noted that: the detection devices of the machine are all provided with switch output signals so as to achieve the purpose of automatic stopping, and the automatic stopping is used for protecting equipment safety and ensuring the quality of produced water.

For example: the water inlet detector is an on-line turbidity meter, and is automatically stopped and warned when the water inlet turbidity exceeds a set value.

For example: the on-line detector is a sludge concentration meter, and when detecting that the suspended matters on the filter material exceed a set value, the system is automatically stopped and alarms, or a corresponding back flushing program is started according to the set value.

For example: the pressure detecting device 29 automatically stops and alarms when detecting that the set value is exceeded.

Abnormal shut-down aims at taking care to take manual intervention, either to inspect the equipment or to take necessary technical measures, such as performing back flushing multiple times.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (20)

1. An energy efficient microfiltration system comprising: the device comprises a liquid inlet main pipe, liquid inlet branch pipes, a micro-filtration device, a sewage main pipe, a liquid outlet main pipe and a control device;

The liquid inlet branch pipes and the micro-filtration devices are respectively provided with a plurality of micro-filtration devices, the plurality of micro-filtration devices are connected with the liquid inlet main pipe through the plurality of liquid inlet branch pipes, liquid enters the plurality of micro-filtration devices through the liquid inlet main pipe and the plurality of liquid inlet branch pipes, the plurality of micro-filtration devices are respectively connected with the sewage main pipe and the liquid outlet main pipe, the micro-filtration devices are used for treating liquid, and sewage and clear water generated after the liquid is treated are respectively discharged through the sewage main pipe and the liquid outlet main pipe;

the micro-filtration device comprises a micro-filtration tank, a sedimentation funnel, a sand-water separation device and an air supply device;

The micro-filtration tank is respectively communicated with the liquid inlet branch pipe, the sewage main pipe and the liquid outlet main pipe, the sedimentation funnel is arranged in the micro-filtration tank, and the sedimentation funnel is communicated with the sewage main pipe;

A filter layer is arranged in the micro-filtration tank, a spray pipe is arranged in the filter layer, the air supply device is communicated with the spray pipe, the air supply device conveys air into the micro-filtration tank through the spray pipe, and the sand-water separation device is connected with the top of the sedimentation funnel so as to prevent filter materials in the filter layer from entering the sedimentation funnel;

the sand-water separation device comprises a porous plate and a supporting part;

The porous plate is arranged at the top of the sedimentation funnel, one side of the supporting part is connected with the sedimentation funnel, and the other side of the supporting part is connected with the porous plate so as to support the porous plate;

The sedimentation funnel comprises a sewage drainage water collector and a check ring;

The support part is connected with the outer surface of the sewage collector, the bottom of the sewage collector is communicated with the sewage main pipe through a sewage pipe, a second automatic sewage valve is arranged on the sewage pipe, and the second automatic sewage valve is in signal connection with the control device;

The check ring is arranged at the top of the sewage drainage water collector, is connected with the porous plate and is used for blocking filter materials in the filter layer from entering the sewage drainage water collector;

The porous plate is vertically arranged, a gap exists between the porous plate and the outer wall of the sewage drainage water collector, and the gap is larger than the average diameter of the filter material, so that the filter material can flow into the filter layer again along the gap.

2. The energy-saving micro-filtration system according to claim 1, wherein the liquid inlet manifold is provided with a water inlet pump, a water quality detector and a flow detector in sequence along the liquid flow direction;

the water inlet pump, the water quality detector and the flow detector are in signal connection with the control device, and the water quality detector and the flow detector are respectively used for detecting the water quality and the flow of the liquid in the liquid inlet main pipe and transmitting the water quality and the flow information to the control device.

3. The energy-saving micro-filtration system of claim 1, wherein a manual regulating valve and an automatic water inlet valve for controlling the flow of liquid in the liquid inlet branch pipe are arranged on the liquid inlet branch pipe.

4. The energy efficient microfiltration system according to claim 1 wherein the microfiltration device further comprises a microfiltration drain;

One end of the microfiltration blow-off pipe is communicated with the side wall of the microfiltration tank, the other end of the microfiltration blow-off pipe is communicated with the blow-off main pipe, and dirt in the microfiltration tank can enter the blow-off main pipe through the microfiltration blow-off pipe;

The micro-filtration blow-down pipe is provided with a first automatic blow-down valve, and the first automatic blow-down valve is in signal connection with the control device.

5. The energy efficient microfiltration system according to claim 1 wherein the microfiltration device further comprises an exhaust gas line;

One end of the exhaust pipeline is connected with the top of the micro-filtration tank, and the other end of the exhaust pipeline is connected with the sewage main pipe;

the automatic switching valve and the flow switch are sequentially arranged in the liquid flowing direction of the exhaust pipeline, the automatic switching valve and the flow switch are connected with the control device through signals, gas in the micro-filtration tank is exhausted through the exhaust pipeline, and the flow switch is used for detecting the liquid filling condition in the micro-filtration tank and transmitting the liquid filling information to the control device.

6. The energy efficient microfiltration system according to claim 5 wherein the exhaust gas line is provided with an exhaust gas branch in parallel;

dirt in the micro-filtration tank can enter the sewage draining main pipe through the exhaust branch, and an exhaust valve is arranged on the exhaust branch and is in signal connection with the control device.

7. The energy efficient micro-filtration system of claim 1, wherein the air supply device comprises an air compressor, an air reservoir, and an air purifier;

the air compressor drives the gas in the air storage tank to enter the air purifier, the air purifier is used for purifying the gas, and the purified gas enters the micro-filtration tank through the air supply pipeline and the spray pipe.

8. The energy efficient microfiltration system according to claim 7 wherein the air supply further comprises an air supply dispenser;

The air source distributor is arranged between the air supply pipeline and the spray pipes, the spray pipes comprise a first spray pipe and a second spray pipe, the first spray pipe and the second spray pipe are arranged in the filter layer, the air source distributor is respectively communicated with the first spray pipe and the second spray pipe through a first air source distribution pipe and a second air source distribution pipe, and gas in the air supply pipeline enters the first spray pipe and the second spray pipe through the air source distributor.

9. The energy efficient micro-filtration system of claim 8, wherein gas valves are provided on both the first gas source distribution pipe and the second gas source distribution pipe;

the cross-sectional area of the gas valve is smaller than the cross-sectional area of the first gas supply distribution pipe.

10. The energy efficient microfiltration system according to claim 8 wherein the air supply further comprises an air supply vent;

The air source exhaust pipe is communicated with the air source distributor, and air in the air source distributor can be exhausted through the air source exhaust pipe.

11. The energy efficient micro-filtration system according to claim 10, wherein the first gas source distribution pipe is provided in plurality, and both ends of the plurality of first gas source distribution pipes are communicated with the gas source distributor and the first spray pipe.

12. The energy-saving micro-filtration system according to claim 11, wherein the gas supply pipeline is provided with an automatic total gas valve and an automatic ball valve in sequence along the gas flow direction;

The second air source distributing pipe and the first air source distributing pipes are respectively provided with an automatic recoil valve, and the automatic total air valve, the automatic ball valve and the automatic recoil valves are respectively connected with the control device through signals.

13. The energy-saving micro-filtration system of claim 1, wherein a back flushing pipeline is arranged between the micro-filtration tank and the liquid outlet main pipe;

One end of the back flush pipeline is communicated with the bottom of the micro-filtration tank, the other end of the back flush pipeline is communicated with the liquid outlet main pipe, and liquid in the liquid outlet main pipe can enter the micro-filtration tank through the back flush pipeline so that the liquid drives dirt in the micro-filtration tank to enter the sedimentation funnel.

14. The energy efficient microfiltration system according to claim 13 wherein the microfiltration device further comprises a forward wash line;

one end of the forward washing pipeline is communicated with the sewage main pipe, and the other end of the forward washing pipeline is communicated with the back washing pipeline, so that dirt in the micro-filtration tank can be discharged through the forward washing pipeline.

15. The energy efficient microfiltration system according to claim 14 wherein the backwash line is provided with an automatic water outlet valve and a manual water outlet valve in sequence along the liquid flow direction;

The automatic forward washing valve is arranged on the forward washing pipeline, and the automatic water outlet valve and the automatic forward washing valve are connected with the control device through signals.

16. The energy efficient microfiltration system according to claim 15 wherein a backwash detection line is provided between the backwash line and the blowdown header;

Two ends of the backwash detection pipeline are respectively communicated with the sewage main pipe and the backwash pipeline;

The backwash detection pipeline is provided with a detector control valve and a water outlet detector in sequence along the liquid flowing direction, and the detector control valve and the water outlet detector are connected with the control device through signals.

17. The energy efficient microfiltration system according to claim 13 wherein the microfiltration device further comprises a pressure detection device;

The pressure detection device is connected with the back flushing pipeline to detect the liquid pressure in the back flushing pipeline.

18. The energy-saving micro-filtration system according to claim 1, wherein an online flowmeter and an online monitor are arranged at a liquid outlet of the liquid outlet main pipe;

The online flowmeter and the online monitor are sequentially arranged along the flow direction in the liquid outlet main pipe.

19. The energy-saving micro-filtration system according to claim 1, wherein the filter material in the filter layer is any one of microporous artificial sintered particles or volcanic particles;

The diameter range of the filter material particles in the filter layer is 0.5-3.0 mm.

20. The energy efficient microfiltration system according to claim 19 wherein the microporous artificial sintered particles are composed of the following raw materials:

75% by weight of aluminum oxide;

25% by weight of silica.