CN214059998U - Oil removing filter block - Google Patents
Oil removing filter block Download PDFInfo
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- CN214059998U CN214059998U CN202022712510.5U CN202022712510U CN214059998U CN 214059998 U CN214059998 U CN 214059998U CN 202022712510 U CN202022712510 U CN 202022712510U CN 214059998 U CN214059998 U CN 214059998U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 337
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Abstract
The utility model discloses an oil removing filter block, which comprises a box-shaped main body, a grid layer, a water receiving plate, a first oil-water separation cavity, a second oil-water separation cavity, a water drainage cavity and a stay cord; the grid layer is positioned on the upper surface of the box-shaped body; the water receiving plate is provided with a water inlet and a water outlet; the first oil-water separation cavity and the second oil-water separation cavity are respectively communicated up and down, and the lower parts of the second oil-water separation cavity and the water drainage cavity are communicated; a water separation plate is arranged between the first oil-water separation cavity and the second oil-water separation cavity, and a water separation plate is arranged between the second oil-water separation cavity and the water drainage cavity; the first oil-water separation cavity is provided with a first oil-water separation net, and the second oil-water separation cavity is provided with a second oil-water separation net; a rotating shaft is arranged on the water-stop sheet, a cross rod is arranged on the rotating shaft, and a heavy ball and a blocking ball are respectively arranged at two ends of the cross rod; one end of the pull rope is connected with the oil absorption sheet. The utility model discloses improve treatment effeciency on the basis that keeps the treatment effect, especially propose for the first time and handle to the profit.
Description
Technical Field
The utility model belongs to the technical field of daily water treatment, concretely relates to deoiling filter block.
Background
The treatment of the wastewater is undoubtedly a win-win way which can solve the problems of environmental problems and water resource shortage and achieve the effect of killing two birds with one stone, wherein the oily wastewater caused by the domestic sewage becomes a great challenge to the environment. The prior art is more directed at sewage and organic matter treatment, but does not have a technology for oil-water separation. The grease has three main characteristics of polarity, biodegradability and physical properties. Polar grease is generally from animals, nonpolar grease is from petroleum and other mineral resources, and generally the polar grease is biodegradable, while the nonpolar grease is difficult to biodegrade. Therefore, new filtering devices are needed to be designed for the sewage containing oil in the commercial district and the steam repair district.
Disclosure of Invention
The utility model discloses an deoiling filter block adopts the filtration different with prior art, improves treatment effeciency on the basis of keeping the treatment effect, especially proposes for the first time to handle to the profit.
The utility model adopts the following technical scheme:
an oil removing filter block comprises a box-shaped main body, a grid layer, a water receiving plate, a first oil-water separation cavity, a second oil-water separation cavity, a water drainage cavity and a pull rope; the grid layer is positioned on the upper surface of the box-shaped body; the water receiving plate is positioned below the grid layer; the water receiving plate is provided with a water inlet and a water outlet; the water inlet is positioned above the first oil-water separation cavity, and the water drainage hole is positioned above the water drainage cavity; the first oil-water separation cavity and the second oil-water separation cavity are respectively communicated up and down, and the second oil-water separation cavity and the water drainage cavity are respectively communicated up and down; a water separation plate is arranged between the first oil-water separation cavity and the second oil-water separation cavity, and a water separation plate is arranged between the second oil-water separation cavity and the water drainage cavity; the first oil-water separation cavity is provided with a first oil-water separation net, and the second oil-water separation cavity is provided with a second oil-water separation net; a rotating shaft is arranged on the water-stop sheet, a cross rod is arranged on the rotating shaft, and a heavy ball and a blocking ball are respectively arranged at two ends of the cross rod; the blocking ball is positioned in the water drainage hole, and the counterweight ball is positioned in the second oil-water separation cavity; the pull rope penetrates through the water-stop sheet and the grid layer; one end of the pull rope is connected with the oil absorption sheet; the oil absorption sheet is positioned below the water receiving plate and above the first oil-water separation net and the second oil-water separation net; a water outlet is formed in the side wall of the box-shaped main body; the water outlet is communicated with the water drainage cavity.
In the utility model, the oil removing filter block is square box-shaped in appearance, a cavity is arranged in the middle, the upper end of the oil removing filter block is opened for feeding sewage, a grid is placed to block macroscopic impurities such as fallen leaves and sand stones, a water receiving plate is placed below the grid, one function is flow guiding, and the other function is buffering, so that the oil-water separation net is prevented from being damaged by water feeding; the side wall of the water receiving plate is also the side wall of the oil removing filter block, namely the side wall of the box-shaped main body, and the water outlet is positioned at the lower end of the side wall of the box-shaped main body as common knowledge. In the deoiling filter block consisting of the first oil-water separation cavity, the second oil-water separation cavity and the water drainage cavity which are sequentially arranged, the cavity below the water receiving plate is inclined on the inner side wall of the bottom surface of the box-shaped main body, the first oil-water separation cavity is high in end, the water drainage cavity is low in end, namely the position of the water outlet is low, and the water subjected to oil-water separation is favorably discharged from the water outlet. Preferably, the delivery port is equipped with porous brick that permeates water, can be at the lateral wall lower extreme opening of box-like main part, at the porous brick that permeates water of opening part installation shape size matching, neither influence the water after the processing from deoiling filter mass outflow, have the adsorption effect to substances such as phosphorus nitrogen moreover, when water flows in the brick downthehole that permeates water, the pore wall has the treatment effect to phosphorus nitrogen etc..
The utility model discloses in, the inlet opening is five, and water falls to the water oil separating net from five holes and nets, spreads after flowing than a hole, and efficient a little and five holes can be so that the separation nethike embrane atress is even, can be located the four corners and the middle trompil of the part of first oil-water separation chamber top at the water receiving plate, more do benefit to the homogeneity that falls into water. As the common knowledge, the water inlet makes profit get into first oil-water separation chamber, under current oil-water separation net exists, utilizes hydrophilic oleophobic to separate, in case the intaking is too big, first oil-water separation chamber comes not too much the separation processing, and unnecessary profit flows into second oil-water separation chamber from the top space department of dividing the water board, and the water that from this handles joins the water that first oil-water separation chamber was handled flows to the delivery port from box-like main part bottom surface to get into current municipal pipeline.
In the utility model, the first oil-water separation cavity and the second oil-water separation cavity are respectively communicated from top to bottom, and the second oil-water separation cavity and the water drainage cavity are respectively communicated from top to bottom; a water diversion plate is arranged between the first oil-water separation cavity and the second oil-water separation cavity, and a water separation plate is arranged between the second oil-water separation cavity and the water drainage cavity. According to common knowledge, the upper end of the water distribution plate is provided with a gap with the water receiving plate, and the lower end of the water distribution plate is provided with a gap with the bottom surface of the box-shaped main body, so that the first oil-water separation cavity and the second oil-water separation cavity are respectively communicated up and down; the upper end of the water-stop sheet is provided with a gap with the water-receiving sheet, and the lower end of the water-stop sheet is provided with a gap with the bottom surface of the box-shaped main body, so that the upper part and the lower part of the second oil-water separation cavity and the water discharge cavity are respectively communicated. When meetting super large rivers, two oil-water separation chambeies come the time of not reaching the drainage, and quick drainage is avoided the waterlogging to exceed oil-water separation and is called first demand, and water spills the water cavity from second oil-water separation chamber overflow this moment, directly from the delivery port drainage. Furthermore, the utility model discloses a water-stop sheet is provided with a rotating shaft for the first time, a cross rod is arranged on the rotating shaft, a heavy ball and a blocking ball are respectively arranged at two ends of the cross rod, the blocking ball is positioned in the water drainage hole, and the heavy ball is positioned in the second oil-water separation cavity; under this structure, block up the ball and be located the outlet and prevent that water from untreated flows into the outlet, preferably block up the ball external diameter and be unanimous with the outlet internal diameter, under the effect of counter weight ball, block up the ball and plug the outlet, preferably block up the ball and be hollow structure, as the general knowledge, the counter weight ball is heavier than blocking up the ball, and the design blocks up the ball and be cavity, has both alleviateed the weight of two balls, makes its convenience from top to bottom again.
The prior art aims at that equipment for separating oil from water is not suitable for outdoor sites, especially can not be used in places such as garbage houses and automobile repair plants, and can not form a cooperative whole with the existing pipeline, but the existing rainwater/sewage separation port is not related to oil-water separation for a plurality of reasons, and besides the point that no one thinks about the point (researchers focus on the oil field because of the oil-water separation), the problems that the water flow efficiency is influenced by the oil-water separation, the separated oil cannot be treated and the like exist. The utility model can meet the separation of ground washing water and medium and small rain in the conventional environment, such as the separation of ground washing water and medium and small rain, and can not form drainage stagnation when processing partial oil water in the case of medium and large rain through the design of the three cavities and the teeterboard structure; further, the utility model relates to a tensile connection oil absorption piece, after oil-water separation, can remove the epaxial oil of separation net, high oleophylic cloth can adsorb a large amount of oil, can use well for a long time, another termination of stay cord has the fixed strip, thereby after having absorbed oil, pull on the oil absorption piece through the stay cord, can put in the water receiving board below, it fixes on the net through the fixed strip to stretch, when oil water enters next time, can not receive the influence of oil absorption piece, as the influence of general knowledge, the structural shape of oil absorption piece is the same with the structural shape of the water receiving board of water oil separating chamber top, for example, the water receiving board trompil, correspond the position, the oil absorption piece is the trompil also, do not influence like this the profit and flow into the oil-water separating chamber from the water receiving board. Can only set up in first water oil separating intracavity, the trompil is unanimous rather than the water receiving board of top this moment, also can also set up the oil absorption piece in second water oil separating chamber, and this oil absorption piece also is fixed through the stay cord, need not the trompil.
Preferably, the grid layer consists of large-aperture grids and small-aperture grids; the small-aperture grids are positioned below the large-aperture grids; can block solid impurities in a grading way, and also can wind and fix the pull rope. The water receiving plate is of a light-transmitting structure, on one hand, the oil removal filter block cavity can be dried, photocatalysis can be performed on the oil-water separation net, and some existing oil-water separation nets are coated with active materials and have visible light catalysis functions, so that some organic matters can be decomposed in oil removal.
In the utility model, the grid layer is arranged at the opening of the box-shaped main body; the water receiving plate is arranged below the opening of the box-shaped main body; the oil-water separation net is respectively arranged in the first oil-water separation cavity and the second oil-water separation cavity. Can set up the round arch conventionally in box-like main part for place corresponding part, for example set up the round arch in the oil water separation intracavity, be used for placing oil water separation net. The oil-water separation net and the oil absorption sheet are convenient to disassemble and replace by adopting a placement structure instead of a splicing structure or a structure of bolts, hinges and the like.
The utility model discloses provide the deoiling filter block to the place that has profit sewage for the first time, the material is selected extensively, can be plastics, inorganic material, also can be for metal material, can also several kinds of materials thoughtlessly take, for example the net is metal, water receiving board for plastics, box-like main part be concrete etc. greatly reduced the preparation degree of difficulty and the cost of deoiling filter block. The utility model discloses except can carrying out oil-water separation, still solved oil-water separation and be unfavorable for the discharged problem of super large water yield, also solved the unable problem of handling of oil after the separation, furtherly, the invention can also handle organic matter, phosphorus nitrogen etc. when oil-water separation. The utility model discloses locate the water after handling, can directly arrange to pipe network or river course.
Drawings
FIG. 1 is a schematic view of a deoiling filter block;
FIG. 2 is a schematic view of an oil removal filter block (a water receiving plate is not shown);
FIG. 3 is a schematic structural view of a porous water permeable brick;
FIG. 4 is a schematic structural view of the box-like body;
FIG. 5 is a schematic view of a water receiving plate;
FIG. 6 is a schematic diagram of the oil absorption sheet (the oil absorption sheet for the first oil-water separation chamber and the second oil-water separation chamber is similar in structure except that five holes are not formed);
FIG. 7 is a schematic structural view of a second oil-water separation chamber;
FIG. 8 is a schematic diagram of a grid structure;
the box-shaped water-permeable brick comprises a box-shaped main body 1, a grid layer 2, a water receiving plate 3, a first oil-water separation cavity 4, a second oil-water separation cavity 5, a water drainage cavity 6, a pull rope 7, a first oil-water separation net 41, a second oil-water separation net 51, a large-aperture grid 21, a small-aperture grid 22, a water inlet hole 31, a water drainage hole 32, a water distribution plate 8, a water stop plate 9, a rotating shaft 91, a cross rod 92, a counterweight ball 93, a blocking ball 94, an oil absorption sheet 71, a fixing strip 72, a water outlet 61, a porous water permeable brick 62, a hole 621, a protrusion 11 and an inclined structure 12.
Detailed Description
The utility model discloses a concrete part all is current product, some are sold, some prepare or the research institution gives according to conventional method, for example oil water separating net obtains from colleges and universities. In realizing the utility model discloses on the basis of each parts effect, concrete installation method is conventional technique, for example the mounted position of water oil separating net, the mounted position of pivot, the length of horizontal pole, counter weight ball/the weight of blockking up the ball, the size in various holes etc. all select for the conventionality, as long as can realize the utility model discloses an effect can. The related test method is a conventional method in the fields of oil-water separation and sewage treatment. It should be noted that, the utility model relates to a multiple hole, for conventional technique, for example the hole that the oil absorption piece has the mesopore, the brick permeates water is micropore, inlet opening for a little greatly for the macroscopic hole, the outlet is bigger for the macroscopic macropore, specific hole size is according to the application of adaptation place conventionality selection.
The utility model relates to a position relation when position is for practical application.
Example one
With reference to figure 1 of the drawings,
an oil removal filter block comprises a box-shaped main body 1, a grid layer 2, a water receiving plate 3, a first oil-water separation cavity 4, a second oil-water separation cavity 5, a water drainage cavity 6 and a pull rope 7; the first oil-water separation cavity is provided with a first oil-water separation net 41, the second oil-water separation cavity is provided with a second oil-water separation net 51, and the water discharge cavity is not provided with a separation net or a treatment plate, namely the water discharge cavity is not provided with other parts except a section of cross rod and a blocking ball; the inner side wall of the bottom surface of the box-shaped main body is inclined, and the end of the first oil-water separation cavity is high and the end of the water drainage cavity is low;
the grid layer is positioned on the upper surface of the box-shaped main body and consists of large-aperture grids 21 and small-aperture grids 22; the small-aperture grids are positioned below the large-aperture grids;
the water receiving plate is positioned below the grid layer and is provided with a water inlet hole 31 and a water outlet hole 32; five water inlet holes are formed in the upper portion of the first oil-water separation cavity and are respectively arranged at four corners and the middle of the first oil-water separation cavity; the water drainage hole is positioned above the water drainage cavity;
the first oil-water separation cavity and the second oil-water separation cavity are respectively communicated up and down, a water diversion plate 8 is arranged between the first oil-water separation cavity and the second oil-water separation cavity, the upper end of the water diversion plate is provided with a gap with the water receiving plate, and the lower end of the water diversion plate is provided with a gap with the bottom surface of the box-shaped main body;
the lower parts of the second oil-water separation cavity and the water drainage cavity are communicated, and a water-stop sheet 9 is arranged between the second oil-water separation cavity and the water drainage cavity; the upper end of the water-stop sheet is provided with a gap with the water-receiving sheet, and the lower end of the water-stop sheet is provided with a gap with the bottom surface of the box-shaped main body;
a rotating shaft 91 is arranged on the water-stop plate, a cross rod 92 is arranged on the rotating shaft, a heavy ball 93 and a blocking ball 94 are respectively arranged at two ends of the cross rod, the blocking ball is positioned in the water drainage hole, the outer diameter of the blocking ball is consistent with the inner diameter of the water drainage hole, and the blocking ball is of a hollow structure; the counterweight ball is positioned in the second oil-water separation cavity and heavier than the blocking ball;
the pull rope penetrates through the water-stop sheet and the grid layer, one pull rope is schematically shown in the attached drawing 1, the pull rope is actually two pull ropes, and the two pull ropes are respectively connected with the two oil absorption sheets for removing oil in the first oil-water separation cavity and the second oil-water separation cavity; one end of the pull rope is connected with an oil absorption sheet 71, and the other end penetrating through the grid layer is connected with a fixing strip 72; the oil absorption sheet is positioned below the water receiving plate and above the oil-water separation net, the size of the oil absorption sheet is consistent with that of the corresponding oil-water separation net, and oil drops on the surface of the oil-water separation net can be absorbed by putting down the oil absorption sheet; the oil suction piece positioned in the first oil-water separation cavity is of a five-hole structure and is consistent with the corresponding water receiving plate, and most of oil is sucked although holes are formed; the oil absorption piece positioned in the second oil-water separation cavity is not provided with a macroscopic hole structure and is consistent with the corresponding water receiving plate;
the water receiving plate is a light-transmitting structure and is a light-transmitting plastic plate; a water outlet 61 is formed in the side wall of the box-shaped body and is communicated with the water drainage cavity, a porous water permeable brick 62 is arranged at the water outlet and is filled with the water outlet, and holes 621 are formed in the porous water permeable brick;
For clarity and conciseness of illustration, some drawings do not show some components, and those skilled in the art can clearly determine the components by combining the text description and the upper and lower drawings, for example, fig. 4 shows no rotating shaft and the like on the water stop sheet, and the mounting structure of the rotating shaft and the function of the two balls can be clearly understood by combining fig. 7.
The laboratory simulates vertical sewage treatment, and the simulated water inlet quality is as follows: engine oil: 2mg/L, total nitrogen: 1.0 mg/L, total phosphorus: 0.3 mg/L, tap water, and dark yellow oil droplets in the water were visually observed.
Before the experiment, the drainage hole is just in time plugged under the effort of counter weight ball to the jam ball, and the stay cord is fixed the oil absorption piece in water receiving plate below, and five holes of oil absorption piece correspond with five holes of water receiving plate.
For the first experiment: outdoor, sunny day, morning, pour simulated water into from the net, fall from five inlet openings after the water receiving board water receiving, flow to the water oil separating net on, under gravity and impact force effect, oil is on the separation net surface, rivers to the inclined plane of box-like main part bottom surface, flow through porous brick that permeates water again, whole process control simulated water is whole in first water oil separating intracavity, does not flow into second water oil separating chamber and the chamber that leaks, and it is to go out water quality: engine oil: not detected, the total nitrogen is 0.8mg/L, the total phosphorus is 0.25 mg/L, and the water outlet is not different from the new tap water by visual observation without dark yellow oil drops. After the experiment is finished, the pull rope is loosened by dialing the fixing strip, the oil absorption sheet is placed on the oil-water separation net in the first oil-water separation cavity, after 1 hour, the oil absorption sheet is pulled up, the grid and the water receiving plate are taken up, the oil-water separation net is wiped by oil absorption paper, and no engine oil remains; a second experiment was then performed.
For the second experiment: outdoor, fine day, morning, pour simulation water into from the net, fall from five inlet openings after the water receiving board water receiving, flow to the water oil separating net on, under gravity and impact force effect, oil is on the separation net surface, rivers to the inclined plane of box-like main part bottom surface, flow through porous brick that permeates water again, whole process control simulation water is at first water oil separating intracavity and flow in second water oil separating chamber, does not flow into the chamber that leaks, and the play water quality of water is: engine oil: not detected, the total nitrogen is 0.81mg/L, the total phosphorus is 0.24 mg/L, and the water outlet is not different from the new tap water by visual observation without dark yellow oil drops. After the experiment is finished, the pull rope is loosened by dialing the fixing strip, the oil absorption sheet is placed on the oil-water separation net in the two oil-water separation cavities, after 1 hour, the oil absorption sheet is pulled up, the grid and the water receiving plate are taken up, the oil-water separation net is wiped by oil absorption paper, and no engine oil remains; a third experiment was then performed.
When water contacts the counterweight ball, the ball gradually rises to drive the blocking ball to descend, the water seeps from the water outlet and flows into a large flow of water, and the water directly flows to the porous water-permeable brick from the water outlet and is discharged out because the water outlet cavity is not blocked, and no engine oil is detected, the water outlet is not different from new tap water by naked eyes, and no deep yellow oil drops exist, which indicates that the water quality of the water outlet cannot be influenced by a small amount of residual oil on the separation net. Long-term experiments were performed.
Long term experiment
Referring to the method of the first experiment, simulated water (engine oil: 2mg/L, without phosphorus and nitrogen) is poured into the grid, and the flow rate is controlled to keep the water not to flow into the second oil-water separation cavity and the water drainage cavity; taking 3L of simulated water as a treatment process, performing oil absorption after the treatment, then performing 3L of simulated water treatment again, performing oil absorption again, repeating the steps, and performing water quality detection after each treatment; after the fifth 3L water treatment, no oil was detected in the effluent, five treatments all resulted in effluent with no oil detected, and five separation efficiencies (water flow rates) were unchanged, terminating the experiment.
Comparative experiment
On the basis of the first embodiment, the water-stop sheet is made of non-transparent plastic, and the rest is the same, a new oil-water separation net and a porous water-permeable brick are used for carrying out an experiment according to a first experiment, and the effluent quality is as follows: engine oil: not detected, total nitrogen 0.9mg/L, total phosphorus 0.27 mg/L.
On the basis of the first embodiment, an oil absorption sheet is not arranged, and the rest is the same, a new oil-water separation net and a porous water permeable brick are used for carrying out experiments according to a long-term experiment, the machine oil is not detected in the 4 th effluent, but 0.06mg/L of machine oil is detected in the 5 th effluent, and the slight difference between the colors of the effluent and the new tap water is observed by naked eyes; from the 3 rd time, the separation efficiency decreased visually, and the 4 th and 5 th times were further decreased gradually. It is shown that after oil-water separation, the oil absorption treatment is beneficial to improving the subsequent separation effect, and as can be understood, the service life of the oil-water separation net can be prolonged, and the cost is reduced, after all, the oil-water separation net is more expensive than the oil absorption cloth.
Claims (10)
1. An oil removal filter block is characterized by comprising a box-shaped main body, a grid layer, a water receiving plate, a first oil-water separation cavity, a second oil-water separation cavity, a water drainage cavity and a pull rope; the grid layer is positioned on the upper surface of the box-shaped body; the water receiving plate is positioned below the grid layer; the water receiving plate is provided with a water inlet and a water outlet; the water inlet is positioned above the first oil-water separation cavity, and the water drainage hole is positioned above the water drainage cavity; the first oil-water separation cavity and the second oil-water separation cavity are respectively communicated up and down, and the lower parts of the second oil-water separation cavity and the water drainage cavity are communicated; a water separation plate is arranged between the first oil-water separation cavity and the second oil-water separation cavity, and a water separation plate is arranged between the second oil-water separation cavity and the water drainage cavity; the first oil-water separation cavity is provided with a first oil-water separation net, and the second oil-water separation cavity is provided with a second oil-water separation net; a rotating shaft is arranged on the water-stop sheet, a cross rod is arranged on the rotating shaft, and a heavy ball and a blocking ball are respectively arranged at two ends of the cross rod; the blocking ball is positioned in the water drainage hole, and the counterweight ball is positioned in the second oil-water separation cavity; the pull rope penetrates through the water-stop sheet and the grid layer; one end of the pull rope is connected with the oil absorption sheet; the oil absorption sheet is positioned below the water receiving plate and above the first oil-water separation net and the second oil-water separation net; a water outlet is formed in the side wall of the box-shaped main body; the water outlet is communicated with the water drainage cavity.
2. The oil removal filter block as recited in claim 1, wherein an inner side wall of a bottom surface of the box-like body is inclined.
3. The deoiling filter block of claim 1, wherein the number of water inlets is five.
4. The deoiling filter block of claim 1, wherein the other end of the drawstring is connected with a fixing strip.
5. The deoiling filter block of claim 1, wherein the water outlet is provided with a porous water permeable brick.
6. The deoiling filter block of claim 1, wherein the mesh layer is composed of large-aperture meshes and small-aperture meshes; the small-aperture grid is positioned below the large-aperture grid.
7. The deoiling filter block of claim 1, wherein said plugging ball outer diameter is consistent with the weep hole inner diameter.
8. The deoiling filter block of claim 1, wherein the plugging ball is a hollow structure.
9. The oil removal filter block of claim 1, wherein the water receiving plate is a light-transmitting structure.
10. The deoiling filter block of claim 1, wherein the mesh layer is placed at the opening of the box-like body; the water receiving plate is arranged below the opening of the box-shaped main body; the first oil-water separation net and the second oil-water separation net are respectively arranged in the first oil-water separation cavity and the second oil-water separation cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022712510.5U CN214059998U (en) | 2020-11-22 | 2020-11-22 | Oil removing filter block |
Applications Claiming Priority (1)
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210827 |