CN111939609A

CN111939609A - A filter equipment for industrial wastewater handles

Info

Publication number: CN111939609A
Application number: CN202010684631.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2020-11-17

Abstract

The invention relates to the technical field of industrial wastewater treatment, in particular to a filtering device for industrial wastewater treatment, which comprises a box body, wherein the upper end of the box body is fixedly connected with a sealing cover, one side of the upper surface of the sealing cover is fixedly communicated with a water inlet pipe, the other side of the upper surface of the sealing cover is provided with a through hole, second porous plates are placed on two supporting blocks, one side of the box body is provided with a limiting mechanism, the upper part of one side of the box body, away from the limiting mechanism, is fixedly communicated with a sewage discharge pipe, the bottom part of one side of the box body, close to the limiting mechanism, is fixedly communicated with an inflation pipe, the bottom part of the other side of the box body is fixedly communicated with. This a filter equipment for industrial wastewater handles through having adopted the mode of back flush, can wash and the blowdown to filtering filler material fast conveniently, and sewage filters the back of accomplishing, need not again to filter filler material and takes out and wash.

Description

A filter equipment for industrial wastewater handles

Technical Field

The invention relates to the technical field of industrial wastewater treatment, in particular to a filtering device for industrial wastewater treatment.

Background

Industrial waste water, including industrial waste water, industrial sewage and cooling water, refers to waste water and waste liquid produced in industrial production process, which contains industrial production materials, intermediate products, by-products and pollutants produced in the production process, which are lost along with water. When handling industrial waste water, because can there be a large amount of particle impurity in the waste water, often need get rid of the particle impurity that exists in the waste water earlier, will need to use filter equipment for filter the impurity that exists in the waste water.

In the existing filtering device for industrial wastewater treatment, part of the filtering devices can use filtering filling materials, the filtering filling materials are usually composed of some spherical particles or some irregular particles, and the filtering filling materials are adopted to have better filtering effect than the filtering net adopted in the past, so that the existing filtering device adopting the filtering filling materials has wider application range.

However, all install a cavity structures who is used for specially filling filter filling material among the current filter equipment, a plurality of holes have been seted up on the cavity, be used for the circulation of water, after accomplishing waste water filtration through filter filling material, because filter filling material comprises a lot of granule, then, the granule impurity of filtering out from waste water will be left over in the clearance between a plurality of granules, if filter filling material live time is longer, the granule impurity of leaving over in the filter filling material will be more and more, the condition that the jam can't be used appears very easily, then need wash this filter filling material. In the prior art, workers firstly disassemble and take out the cavity structure filled with the filtering and filling material from the filtering device, and then wash the cavity structure through a water pipe, so that great inconvenience is brought to the whole cleaning process of the filtering and filling material; in addition, because the water pipe is used manually for washing, workers cannot guarantee that each position is washed, positions which are not washed can be easily found, the condition of leaving dead corners can be easily found, and the cleaning effect of the filter filling material can be influenced.

Disclosure of Invention

The invention aims to solve the defects that the filter filling material is inconvenient to clean and the cleaning effect is not ideal in the prior art, and provides a filter device for industrial wastewater treatment.

In order to achieve the purpose, the invention adopts the following technical scheme:

the filter device for treating the industrial wastewater comprises a box body, wherein a sealing cover is fixedly connected to the upper end of the box body, a water inlet pipe is fixedly communicated with one side of the upper surface of the sealing cover, an opening is formed in the other side of the upper surface of the sealing cover, a first porous plate is fixedly connected to the lower part of the inner side wall of the box body, supporting blocks are respectively and fixedly connected to the upper parts of the two sides of the inner wall of the box body, a second porous plate is placed on the two supporting blocks, a filtering and filling material is filled between the first porous plate and the second porous plate, a limiting mechanism is arranged on one side of the box body, extends into the box body and is connected with the second porous plate, a drain pipe is fixedly communicated with the upper part of the side of the box body, which is far away from the limiting mechanism, and is positioned above the second porous plate, and an inflation pipe is, just the gas tube with stop gear is connected, the bottom rigidity intercommunication of box opposite side has the drain pipe, the box is close to the lower part rigidity intercommunication of drain pipe one side has the water pipe that fills, just fill the water pipe and be located the top of drain pipe is located the below of first perforated plate, it is external to have water supply mechanism to fill the water pipe, the central point of box bottom puts fixedly connected with motor, the output shaft one end of motor run through to the interior bottom and the fixedly connected with impeller of box, the lower part rigidity intercommunication of box one side has the pencil of dosing, just the pencil of dosing is located fill directly over the water pipe and be located the below of first perforated plate.

Preferably, stop gear includes connecting rod, fixed plate and air duct, fixed plate fixed connection be in on the lateral wall of box, the connecting rod is U type pole, connecting rod one end is run through opening and fixed connection be in one side of second perforated plate upper surface, the connecting rod other end slidable runs through fixed plate and fixedly connected with stopper, the fixed intercommunication of air duct is in the upper end of gas tube, just the air duct is L type pipe, the air duct is still fixed connection be in on the lower surface of fixed plate, the air duct upper end with be provided with block mechanism between the connecting rod.

Preferably, the clamping mechanism comprises a groove, the groove is formed in one side of the connecting rod, a spring is fixedly connected to the bottom in the groove, a clamping block is fixedly connected to one end of the spring, and the clamping block can be clamped in the air guide pipe.

Preferably, the water supply mechanism comprises a water storage tank, a first guide pipe and a second guide pipe, the water storage tank is arranged on one side of the box body, the first guide pipe is fixedly communicated with the water discharge pipe, the second guide pipe is fixedly communicated with one end of the water filling pipe, one end of the first guide pipe extends to the upper portion of one side inside the water storage tank, one end of the second guide pipe extends to the lower portion of the other side inside the water storage tank, and the second guide pipe is fixedly connected with a water pump.

Preferably, the first perforated plate is a stainless steel metal perforated plate.

Preferably, the second porous plate is a foamed plastic porous plate.

Preferably, the distance between the upper surface of the second porous plate and the bottom end of the sewage discharge pipe is the same as the distance between the upper surface of the limiting block and the bottom end of the bent part at the upper end of the air guide pipe.

The filter device for industrial wastewater treatment provided by the invention has the beneficial effects that: this a filter equipment for industrial waste water treatment has adopted reverse gas filling and the mode of filling water, and under the effect of high-speed pivoted impeller, not only can make to produce a large amount of bubbles in the washing water, make to present a boiling-like state in the washing water, and because lasting aeration, and under the effect of high-speed pivoted impeller, thereby make the washing water receive an ascending drive power, consequently, the washing water is similar boiling and under receiving the two kinds of states that the drive power rises that make progress, thereby can wash filtering filling material fast effectively, can wash the impurity that exists in the clearance between the filtering filling material granule fast, and washing water finally can all walk over filtering filling material, thereby make the cleaning performance better, more abundant thorough. And the cleaned sewage can be directly discharged from the sewage discharge pipe, which is very convenient. According to the technical scheme, the filtering and filling material does not need to be taken out of the device for cleaning, so that the operation process is simplified, and the working process of workers is facilitated; in addition, the cleaning water of the technical scheme completely overflows the filtering and filling material, so that the defect that the filtering and filling material is taken out and washed by a water pipe in the prior art can be thoroughly avoided, and the situations of insufficient washing and dead angles left cannot occur.

Drawings

FIG. 1 is a schematic structural view of a filtering apparatus for industrial wastewater treatment according to the present invention.

FIG. 2 is a schematic structural view of a filter unit for industrial wastewater treatment according to the present invention in a process of cleaning filter packing materials.

Fig. 3 is an enlarged schematic view of the structure of the portion a in fig. 1.

Fig. 4 is a schematic perspective view of a filtering apparatus for industrial wastewater treatment according to the present invention.

Fig. 5 is a schematic perspective view of a filtering apparatus for industrial wastewater treatment according to the present invention.

In the figure: the device comprises a box body 1, a sealing cover 2, a water inlet pipe 3, a through opening 4, a first porous plate 5, a supporting block 6, a second porous plate 7, a filtering and filling material 8, a water outlet pipe 9, an inflation pipe 10, a water filling pipe 11, a water supply mechanism 12, a water storage tank 121, a first guide pipe 122, a second guide pipe 123, a water pump 124, a limiting mechanism 13, a connecting rod 131, a fixing plate 132, a limiting block 133, an air duct 134, a clamping mechanism 135, a groove 1351, a spring 1352, a clamping block 1353, a sewage discharge pipe 14, a motor 15, an impeller 16 and a dosing pipe 17.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

Referring to fig. 1-5, a filter equipment for industrial wastewater treatment, including box 1, box 1 upper end fixedly connected with closing cap 2, the fixed intercommunication in closing cap 2 upper surface one side has inlet tube 3, and the industrial wastewater that needs to be handled is from discharging into the device in inlet tube 3, and opening 4 has been seted up to closing cap 2 upper surface opposite side, the first perforated plate 5 of lower part position fixedly connected with of box 1 inside wall, and first perforated plate 5 is the stainless steel metal perforated plate.

The upper portion of 1 inner wall both sides of box is equallyd divide do not fixedly connected with supporting shoe 6, has placed second perforated plate 7 on two supporting shoes 6, and second perforated plate 7 is the foamed plastic perforated plate, and the weight that adopts the second perforated plate 7 of foamed plastic material is lighter.

It has filtration filling material 8 to fill between first perforated plate 5 and the second perforated plate 7, and box 1 one side is provided with stop gear 13, and stop gear 13 extends to in the box 1 and is connected with second perforated plate 7, and stop gear 13 can make second perforated plate 7 spacing can not reciprocate on supporting shoe 6, thereby second perforated plate 7 can be with filtering filling material 8 and push down.

The upper portion fixed connection that stop gear 13 one side was kept away from to box 1 has blow off pipe 14, and blow off pipe 14 is located the top of second perforated plate 7, and blow off pipe 14 is used for discharging to wash and filters the sewage behind filling material 8, and the bottom fixed connection that box 1 is close to stop gear 13 one side has gas tube 10, and gas tube 10 is connected with stop gear 13, and gas tube 10 is external to have the air pump, starts the air pump, can aerify to box 1 in through gas tube 10.

The bottom fixed intercommunication of box 1 opposite side has drain pipe 9, and drain pipe 9 is used for discharging the water after filtration treatment, and the box 1 is close to the lower part fixed intercommunication of drain pipe 9 one side and has filled water pipe 11, and fills water pipe 11 and be located the top of drain pipe 9 and be located the below of first perforated plate 5, fills water pipe 11 and is external to have water supply mechanism 12, through water supply mechanism 12, can provide the water source to filling water pipe 11, can fill water in to box 1 through filling water pipe 11.

The central point of 1 bottom of box puts fixedly connected with motor 15, the output shaft one end of motor 15 runs through to the interior bottom and the fixedly connected with impeller 16 of box 1, all blades on impeller 16 all set up according to same incline direction and angle tilt up, motor 15 passes through the wire and is connected with external power supply unit, and be provided with the switch of control motor 15 operation on the wire, after through filling water pipe 11 to the inside injected water of box 1, starter motor 15, motor 15 drives the high-speed rotation of impeller 16, and high-speed pivoted impeller 16 then can give the effort of a syntropy of water, can make water rotatory along the inside wall of box 1, high-speed pivoted impeller 16 still can give an ascending effort of water simultaneously, make water can the upward movement at rotatory in-process.

The lower part of one side of the box body 1 is fixedly communicated with a dosing pipe 17, the dosing pipe 17 is positioned right above the water filling pipe 11 and below the first porous plate 5, in the process of filling water into the box body 1 through the water filling pipe 11, a foaming agent is added into the box body 1 through the dosing pipe 17, meanwhile, the box body 1 is inflated through the inflating pipe 10, the filled gas can stir the water in the box body 1, the foaming agent is fully mixed into the water, after the foaming agent fully reacts with the water, a layer of foam is formed on the surface of the water level, when the water overflows through the filtering and filling material 8, the foam has certain supporting capacity, the layer of foam on the surface of the water level can lift with impurities in the filtering and filling material 8 and is finally discharged from the sewage discharge pipe 14. Wherein, the foaming agent can adopt fatty acid alkanolamide, dodecyl dimethyl amine oxide or coco diethanol amide.

During operation of the device, the valves on the gas filling pipe 10, the water discharge pipe 9, the water filling pipe 11 and the sewage discharge pipe 14 are closed before operation. When the device starts to operate, a valve on the drain pipe 9 is opened, industrial wastewater to be treated is conveyed into the box body 1 through the water inlet pipe 3, then the wastewater sequentially passes through the second porous plate 7, the filtering filling material 8 and the first porous plate 5, and after being filtered by the filtering filling material 8, the water directly falls down and is discharged to the outside from the drain pipe 9, so that the filtering process of the industrial wastewater can be completed; after the filtration is finished, because a lot of impurities are left in the filter filling material 8, the filter filling material 8 needs to be cleaned, firstly, the valve on the drain pipe 9 is closed, then the valves on the inflation pipe 10, the inflation pipe 11 and the sewage discharge pipe 14 are opened, then the water is filled into the box body 1 through the water supply mechanism 12 and the inflation pipe 11, and simultaneously, the air is filled into the box body 1 through the air pump and the inflation pipe 10, in the process, the water in the box body 1 is gradually raised, and when the filled air is mixed into the filled water, a large amount of bubbles are generated in the water, in the process of filling the water and the air, the water in the box body 1 is continuously raised along with a large amount of bubbles in the water, in the process, the motor 15 is simultaneously started to drive the impeller 16 to rotate at a high speed, so that a rotating acting force and an upward driving acting force can be given to the continuously, when water rises between the first perforated plate 5 and the second perforated plate 7, since a large amount of bubbles are generated in the water and the water is still in a rising state, and at the same time, the water rises with impurities in gaps between the filter packing materials 8 under an upward driving force given by the impeller 16 rotating at a high speed, the water washes the filter packing materials 8 and gradually and completely overflows the filter packing materials 8, thereby sufficiently washing off the impurities existing in the gaps between the particles of the filter packing materials 8, and finally, since the water and the bubbles in the water move upward with the impurities and pass through the second perforated plate 7 due to the continuous filling and aeration of the tank 1 and the action of the impeller 16 rotating at a high speed, the washed sewage with the impurities is discharged from the sewage discharge pipe 14 during the continuous washing of the filter packing materials 8, the cleaning process of the filter packing material 8 can be completed.

From the above, it can be seen that the filter device adopts the reverse aeration and water filling manner, and under the action of the impeller 16 rotating at high speed, not only can generate a large amount of bubbles in the cleaning water, so that the cleaning water presents a boiling-like state, but also because of the continuous aeration and the action of the impeller 16 rotating at high speed, the cleaning water is subjected to an upward driving force, therefore, the cleaning water can rapidly and effectively clean the filter filling material 8 in two states of boiling-like and rising of the upward driving force, impurities existing in gaps among particles of the filter filling material 8 can be rapidly cleaned, and the cleaning water finally and completely overflows the filter filling material 8, so that the cleaning effect is better, more fully and completely. And, the sewage after being cleaned can also be directly discharged from the sewage discharge pipe 14, which is very convenient. According to the technical scheme, the filtering and filling material 8 does not need to be taken out of the device for cleaning, so that the operation process is simplified, and the working process of workers is facilitated; in addition, the cleaning water of the technical scheme completely overflows the filtering and filling material 8, so that the defect that the filtering and filling material 8 is taken out and washed by a water pipe in the prior art can be thoroughly avoided, and the situations of insufficient washing and dead angles left cannot occur.

Example 2

In the embodiment 1, in the process of cleaning the filtering filler 8 by the apparatus, the second porous plate 7 is limited by the limiting mechanism 13 in the embodiment 1, and cannot move up and down, and since the first porous plate 5 is also fixed, the size of the space between the first porous plate 5 and the second porous plate 7 is fixed, the filling space where the filtering filler 8 is located is not changed, the size of the gap between the particles of the filtering filler 8 is limited, and therefore, the impurities existing in the gap between the particles are not easily cleaned, and the cleaning process of the impurities existing in the gap between the particles is hindered, and therefore, the cleaning effect of the filtering filler 8 is relatively affected, as shown in fig. 1-3, as another preferred embodiment of the present invention, the difference from embodiment 1 is that the limiting mechanism 13 includes a connecting rod 131, a fixing plate 132 and an air duct 134, the fixing plate 132 is fixedly connected to the outer sidewall of the box body 1, the connecting rod 131 is a U-shaped rod, one end of the connecting rod 131 penetrates through the through hole 4 and is fixedly connected to one side of the upper surface of the second porous plate 7, the other end of the connecting rod 131 slidably penetrates through the fixing plate 132 and is fixedly connected to a limiting block 133, the air duct 134 is fixedly connected to the upper end of the air tube 10, the air duct 134 is an L-shaped tube, the air duct 134 is further fixedly connected to the lower surface of the fixing plate 132, and a clamping mechanism.

The distance between the upper surface of the second porous plate 7 and the bottom end of the sewage discharge pipe 14 is the same as the distance between the upper surface of the limiting block 133 and the bottom end of the bent part of the upper end of the air guide pipe 134, the design here is that when the second porous plate 7 rises to the sewage discharge pipe 14, the limiting block 133 can just rise to the air guide pipe 134, at this time, the limiting block 133 can be limited by the air guide pipe 134, the limiting block 133 can not rise any more, then the second porous plate 7 can not rise any more, even in the process of water filling and air inflation, the second porous plate 7 is also in the position which is parallel to the bottom end of the sewage discharge pipe 14, and therefore the filtering and filling materials 8 can be prevented from being discharged from the sewage discharge pipe 14; meanwhile, the cleaned sewage may be directly discharged from the sewage drain pipe 14.

The clamping mechanism 135 comprises a groove 1351, the groove 1351 is formed in one side of the connecting rod 131, a spring 1352 is fixedly connected to the bottom of the groove 1351, a clamping block 1353 is fixedly connected to one end of the spring 1352, and the clamping block 1353 can be clamped in the air guide tube 134.

With reference to embodiment 1, during the process of cleaning the filtering and filling material 8 by the apparatus, during inflation, a part of gas enters the gas guiding tube 134, another part of gas enters the tank 1 from the inflation tube 10, the pressure in the inner cavity of the gas guiding tube 134 is increased by the gas entering the gas guiding tube 134, during the process of continuously introducing gas into the gas guiding tube 134, the pressure in the inner cavity of the gas guiding tube 134 is continuously increased, finally, under the action of the pressure, the fixture 1353 is pressed out of the gas guiding tube 134 and pressed into the groove 1351, at this time, the limit state of the connecting rod 131 is released, and then the limit state of the second porous plate 7 is also released; meanwhile, the gas filled into the box body 1 from the gas filling pipe 10 and under the combined action of the filled water, and under the action of the impeller 16 rotating at high speed, an upward acting force can be provided for the second porous plate 7, and under the action of the buoyancy of the second porous plate 7, the second porous plate 7 can ascend, and under the limiting action of the limiting block 133, the second porous plate 7 can only ascend to the position which is parallel and level with the bottom end of the sewage discharge pipe 14, at the moment, the space between the second porous plate 7 and the first porous plate 5 is enlarged, the size of the gap between the particles of the filtering and filling material 8 is enlarged, the filtering and filling material 8 becomes relatively loose, and then the cleaning water can relatively easily clean the impurities existing between the particle gaps. Compared with the embodiment 1, the technical scheme can enable the cleaning effect to be better and more sufficient, and can effectively solve the defect that the filling space of the filter filling material 8 in the embodiment 1 is fixed and the defect exists.

Example 3

In embodiment 1, the water supply means 12 externally connected to the water filling pipe 11 is used to supply the washing water during the process of filling the water into the housing 1 through the water filling pipe 11, and in embodiment 1, the water supply means 12 is used as an externally connected water supply source, so that the apparatus needs to use an additional separate water source to wash the filter packing material 8 when washing the filter packing material 8, which increases the water consumption and generates a certain waste of water resources, referring to fig. 1, 2, 4 and 5, as another preferred embodiment of the present invention, the difference from embodiment 1 is that the water supply means 12 includes a water storage tank 121, a first conduit 122 and a second conduit 123, the water storage tank 121 is disposed at one side of the housing 1, the first conduit 122 is fixedly communicated with the water discharge pipe 9, the second conduit 123 is fixedly communicated with one end of the water filling pipe 11, one end of the first conduit 122 extends to an upper portion of an inner side of the water storage tank 121, one end of the second conduit 123 extends to the lower part of the other side inside the water storage tank 121, the water pump 124 is fixedly connected to the second conduit 123, in this embodiment, by connecting a first conduit 122 to the water discharge pipe 9, part of the filtered water is discharged into the water storage tank 121 through the first conduit 122 in the process of discharging from the water discharge pipe 9, and when the filtering filling material 8 needs to be cleaned after the filtering is completed, the water pump 124 is turned on, and the second conduit 123 draws water from the water storage tank 121 and conveys the water into the tank 1 through the water filling pipe 11, so that the water filling process can be completed. In this embodiment, the washing water has just in time adopted the water after filtering, and the water after filtering is clean moreover, can be used for as the washing water, consequently, this technical scheme need not the independent water source of extra use again, make full use of the water after filtering, realized the cyclic utilization of drainage to can practice thrift the water resource, can solve the problem that the water consumption that exists is big among the embodiment 1 effectively, can cause the waste of water resource.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The filtering device for industrial wastewater treatment comprises a box body (1) and is characterized in that a sealing cover (2) is fixedly connected to the upper end of the box body (1), a water inlet pipe (3) is fixedly communicated to one side of the upper surface of the sealing cover (2), a through hole (4) is formed in the other side of the upper surface of the sealing cover (2), a first porous plate (5) is fixedly connected to the lower position of the inner side wall of the box body (1), supporting blocks (6) are fixedly connected to the upper parts of the two sides of the inner wall of the box body (1) respectively, a second porous plate (7) is placed on the two supporting blocks (6), a filtering and filling material (8) is filled between the first porous plate (5) and the second porous plate (7), a limiting mechanism (13) is arranged on one side of the box body (1), and the limiting mechanism (13) extends into the box body (1) and is connected with the, the upper part position of the box body (1) far away from one side of the limiting mechanism (13) is fixedly communicated with a blow-off pipe (14), the blow-off pipe (14) is positioned above the second porous plate (7), the bottom position of the box body (1) near one side of the limiting mechanism (13) is fixedly communicated with an inflation pipe (10), the inflation pipe (10) is connected with the limiting mechanism (13), the bottom position of the other side of the box body (1) is fixedly communicated with a drain pipe (9), the lower part position of the box body (1) near one side of the drain pipe (9) is fixedly communicated with a water filling pipe (11), the water filling pipe (11) is positioned above the drain pipe (9) and below the first porous plate (5), the water filling pipe (11) is externally connected with a water supply mechanism (12), the central position of the bottom end of the box body (1) is fixedly connected with a motor (15), one end of an output shaft of the motor (15) penetrates through the inner bottom of the box body (1) and is fixedly connected with an impeller (16), a dosing pipe (17) is fixedly communicated with the lower portion of one side of the box body (1), and the dosing pipe (17) is located right above the water filling pipe (11) and is located below the first porous plate (5).

2. A filtering device for industrial wastewater treatment according to claim 1, the limiting mechanism (13) comprises a connecting rod (131), a fixing plate (132) and an air duct (134), the fixing plate (132) is fixedly connected to the outer side wall of the box body (1), the connecting rod (131) is a U-shaped rod, one end of the connecting rod (131) penetrates through the through hole (4) and is fixedly connected with one side of the upper surface of the second porous plate (7), the other end of the connecting rod (131) can slidably penetrate through the fixing plate (132) and is fixedly connected with a limiting block (133), the air duct (134) is fixedly communicated with the upper end of the inflation tube (10), the air duct (134) is an L-shaped tube, the air duct (134) is also fixedly connected to the lower surface of the fixing plate (132), a clamping mechanism (135) is arranged between the upper end of the air duct (134) and the connecting rod (131).

3. A filtering device for industrial wastewater treatment according to claim 1, characterized in that the clamping mechanism (135) comprises a groove (1351), the groove (1351) is opened at one side of the connecting rod (131), a spring (1352) is fixedly connected to the inner bottom of the groove (1351), a block (1353) is fixedly connected to one end of the spring (1352), and the block (1353) can be clamped in the air duct (134).

4. The filtering apparatus for industrial wastewater treatment according to claim 1, wherein the water supply mechanism (12) comprises a water storage tank (121), a first conduit (122) and a second conduit (123), the water storage tank (121) is disposed at one side of the tank (1), the first conduit (122) is fixedly communicated with the water discharge pipe (9), the second conduit (123) is fixedly communicated with one end of the water filling pipe (11), one end of the first conduit (122) extends to the upper part of one side inside the water storage tank (121), one end of the second conduit (123) extends to the lower part of the other side inside the water storage tank (121), and a water pump (124) is fixedly connected to the second conduit (123).

5. A filtering device for industrial wastewater treatment according to claim 1, characterized in that said first perforated plate (5) is a stainless steel metal perforated plate.

6. A filtering device for industrial wastewater treatment according to claim 1, characterized in that the second porous plate (7) is a cellular plastic porous plate.

7. The filtering device for industrial wastewater treatment according to claim 1, wherein the distance from the upper surface of the second perforated plate (7) to the bottom end of the sewage pipe (14) and the distance from the upper surface of the stopper (133) to the bottom end of the bent portion of the upper end of the air duct (134) are the same.