CN211946549U - Low-suspended matter oil-containing mine water treatment equipment for coal mine - Google Patents

Abstract

The utility model discloses a low-suspension oil-containing mine water treatment equipment for coal mines, which comprises a mixing tank, a flocculation tank, a maturation tank and a sedimentation air flotation tank. The inlet of the flocculation tank and the backflow slime inlet of the mixing tank, the flocculation tank water inlet and the flocculation tank return slime inlet are arranged at the lower position of the side wall of the flocculation tank body, and the outlet of the curing tank is arranged at the lower position of the side wall of the curing tank body, and the sedimentation The side wall of the air flotation tank body is provided with a water inlet of the sedimentation air flotation tank at the lower position, and the bottom of the sedimentation air flotation tank body is provided with a heavy mud bucket and a light mud bucket. The utility model improves the efficiency of coagulation, flocculation and sedimentation, effectively integrates the technologies of gravity degreasing, air flotation degreasing and coagulation sedimentation, and reduces the occupation of land and cost.

Description

A low suspended solids oily mine water treatment equipment for coal mines

technical field

The utility model belongs to the field of waste water treatment, in particular to a low-suspended oil-containing mine water treatment equipment for coal mines.

Background technique

Suspended solids in mine water mainly include coal powder and rock powder. The density of pulverized coal is about 1.05-1.8 g/cm ³ , which is far less than the density of surface cement sand (1.9-2.6 g/cm ³ ), so it has dynamic stability. The particle size of suspended solids in mine water is small. Common pollutants in mine water include oil substances. Oil substances mainly include emulsions and waste oil that enter the mine water in the process of coal mining. These pollutants restrict the reuse of mine water.

The traditional treatment technology of mine water suspended solids is coagulation and sedimentation technology. Users generally adopt the method of increasing the dosage of coagulant and flocculant to improve the removal rate of coal mine suspended solids. Therefore, the coagulation and sedimentation technology has problems such as low treatment efficiency, large dosage, large engineering area and unstable treatment effect.

The collection cycle of mine water makes most of the oil substances exist in the water in an emulsified state, accounting for 60%-80% of the oil concentration. Due to the presence of surfactants, oil is emulsified in water, with high dispersibility and stability, and the economic feasibility of treating trace oil in coal mine water with conventional oily wastewater treatment technology is poor. Therefore, there is currently no relatively mature treatment technology for oily substances. For example, when the oil content is low, the coal mine chooses to not set up a special trace oil treatment process in the mine water, but simply remove it through the subsequent filtration process, which will greatly shorten the service life of the related equipment.

Utility model content

The purpose of this utility model is to provide a low suspended solids oily mine water treatment equipment for coal mines, which mainly solves the existing problems in the prior art. Oil-functional mine water treatment process. The present invention improves the treatment efficiency of the traditional process and reduces the dosage by first classifying and collecting the coal slime according to the concentration of the coal slime and the sedimentation performance of the coal slime, and then recirculating them respectively. The invention effectively integrates the demulsification technology with the air flotation and coagulation sedimentation technology by adding the air flotation system before and after the inclined plate sedimentation area, and forms a new treatment process for the oily wastewater containing suspended solids in coal mines that enhances the coagulation sedimentation and takes the air flotation technology into consideration. .

The technical scheme of the present utility model is,

A low suspended solids oily mine water treatment equipment for coal mines, comprising a mixing tank, a flocculation tank, a maturation tank and a sedimentation air flotation tank,

Wherein, the mixing pool includes a mixing pool body, the side wall of the mixing pool body is provided with a mixing pool water outlet and a mixing pool return slime inlet, and the flocculation pool includes a flocculation pool body, and the side wall of the flocculation pool body is located at a lower position The flocculation tank water inlet and the flocculation tank return slime inlet are provided, and the mixing tank water outlet is connected with the flocculation tank water inlet.

Wherein, the maturation tank includes a maturation tank body, the side wall of the maturation tank body is provided with a water outlet of the maturation tank, the sedimentation air flotation tank includes a sedimentation air flotation tank body, and the side wall of the sedimentation air flotation tank body is provided at the lower position of the sedimentation air flotation tank. The water inlet and the bottom of the sedimentation air flotation tank body are provided with heavy mud hopper and light mud hopper. The water outlet of the maturing tank is connected with the water inlet of the sedimentation air flotation tank. Slime inlet is connected.

The features of the present utility model and also lie in,

Both the heavy mud hopper and the light mud hopper are inverted conical structures, and the bottoms of the heavy mud hopper and the light mud hopper are respectively provided with the heavy mud hopper slime return port and the light mud hopper slime return port, the heavy mud hopper slime return port and the light mud hopper. The slime return ports of the light mud hopper are respectively communicated with the heavy mud hopper and the light mud hopper.

The top of the mixing tank body is provided with a mixing tank water inlet, the top of the mixing tank body is provided with a mixing tank mixer extending into the mixing tank body, and the top of the mixing tank body is provided with a mixing tank dosing device.

The top of the flocculation tank body is provided with a flocculation tank mixer extending into the flocculation tank body, the flocculation tank water outlet is provided at the upper position of the side wall of the flocculation tank body, and the flocculation tank dosing device is arranged on the top of the flocculation tank body.

The side wall of the curing tank body is provided with a curing tank water inlet at the upper position, and the top of the curing tank body is provided with a curing tank mixer extending into the curing tank body.

The sedimentation air flotation tank body is provided with an air distribution water oil skimming area, an air flotation area and an intermediate area located between them. The intermediate area includes a clean water area and The slime area below the inclined tube packing.

Among them, the water inlet of the sedimentation air flotation tank is arranged at the position below the side wall of the water distribution oil skimming zone away from the middle zone, and the heavy mud hopper and the light mud hopper are both arranged at the bottom of the coal slime zone.

A vertical baffle is set in the water distribution and oil skimming area, a front oil skimming pipe is set on the side wall near the middle area in the water distribution and oil skimming area, a horizontal overflow weir is installed in the clean water area, and the air flotation area is located near the middle area. A water distribution wall is arranged, the air flotation area is provided with a pressurized air releaser at the lower position of the side wall away from the middle area, a vertical reverse flow plate is arranged on the inner side of the bottom of the air flotation area, and the air flotation area is close to the inner side of its top. The position is provided with a rear oil skimmer, and the air flotation area is provided with a water outlet of the air flotation area at a position below the side wall far from the middle area.

The beneficial effect of the utility model is that the low suspended solids oily mine water treatment equipment for coal mines of the present utility model firstly strengthens the coagulation and sedimentation treatment effect of low suspended solids in coal mines through the method of backflow of coal slime, and at the same time uses a flocculant to treat the water in the water. The emulsified oil is demulsified, and the light oil is collected for the first time by the oil collecting tank in front of the inclined plate precipitation area, and the remaining oil is collected and processed by the air flotation area after the inclined plate precipitation area.

Description of drawings

Fig. 1 is a kind of structural representation of the low suspended solids oil-containing mine water treatment equipment of the present utility model for coal mines;

Fig. 2 is a kind of cross-sectional schematic diagram of the mixing tank 1 of the low suspended solids oil-containing mine water treatment equipment of the present utility model for coal mines;

Figure 3 is a schematic cross-sectional view of a flocculation tank 2 of a low-suspended solids oil-containing mine water treatment equipment for coal mines of the present invention;

4 is a schematic cross-sectional view of a curing tank 3 of a low suspended solids oil-containing mine water treatment equipment for coal mines of the present invention;

FIG. 5 is a schematic cross-sectional view of the sedimentation and degreasing tank 4 of a low-suspended-suspension oil-containing mine water treatment equipment of the present invention.

The numbers in the figure indicate that mixing tank 1, flocculation tank 2, maturing tank 3, sedimentation and degreasing tank 4, mixing tank water inlet 101, mixing tank mixer 102, mixing tank water outlet 103, mixing tank return slime inlet 104, mixing tank Dosing device 105, flocculation tank inlet 201, flocculation tank mixer 202, flocculation tank water outlet 203, flocculation tank return slime inlet 204, flocculation tank dosing device 205, maturation tank water inlet 301, maturation tank mixer 302, maturation tank Water outlet 303, water distribution area 4A, clean water area 4B, coal slime area 4C, air flotation area 4D, sedimentation air flotation tank inlet 401, baffle 402, front oil skimmer 403, inclined tube packing 404, overflow weir 405, heavy Mud hopper 406, light mud hopper 407, heavy mud hopper return slime outlet 408, light mud hopper return slime outlet 409, water inlet guide wall 410, pressurized dissolved gas inlet 411, reverse flow plate 412, rear oil skimmer 413 , Water outlet 414.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1 and Figure 2, a low suspended solids oily mine water treatment equipment for coal mines, including a mixing tank 1, a flocculation tank 2, a maturation tank 3 and a sedimentation air flotation tank 4,

Among them, the mixing tank 1 includes a mixing tank body, the side wall of the mixing tank body is provided with a mixing tank water outlet 103 and a mixing tank return slime inlet 104, and the flocculation tank 2 includes a flocculation tank body, and the side wall of the flocculation tank body is provided with The lower position is provided with a flocculation tank water inlet 201 and a flocculation tank return slime inlet 204, and the mixing tank water outlet 103 is communicated with the flocculation tank water inlet 201,

Wherein, the maturation tank 3 includes a maturation tank body, the side wall of the maturation tank body is provided with a maturation tank outlet 303 at the lower position, and the sedimentation air flotation tank 4 includes a sedimentation air flotation tank body, and the sidewall of the sedimentation air flotation tank body is provided at a lower position. The water inlet 401 of the sedimentation air flotation tank and the bottom of the sedimentation air flotation tank body are provided with a heavy mud hopper 406 and a light mud hopper 407. The water outlet 303 of the maturing tank is communicated with the water inlet 401 of the sedimentation air flotation tank. The heavy mud hopper 406 and the light mud hopper 407 are respectively connected with The mixing tank return slime inlet 104 communicates with the flocculation tank return slime inlet 204 .

Further, the heavy mud hopper 406 and the light mud hopper 407 are both inverted conical structures, and the bottoms of the heavy mud hopper 406 and the light mud hopper 407 are respectively provided with a heavy mud hopper slime return port 408 and a light mud hopper slime reflux. The port 409, the heavy mud hopper slime return port 408 and the light mud hopper slime return port 409 communicate with the heavy mud hopper (406) and the light mud hopper 407, respectively.

Further, a mixing pool water inlet 101 is provided at the upper position of the side wall of the mixing pool body, a mixing pool mixer 102 extending into the mixing pool body is provided on the top of the mixing pool body, and a mixing pool dosing is provided on the top of the mixing pool body. device 105.

As shown in Figure 3, the top of the flocculation tank body is provided with a flocculation tank mixer 202 extending into the flocculation tank body, the flocculation tank body is provided with a flocculation tank outlet 203 at the top of the side wall of the flocculation tank body, and the top of the flocculation tank body is provided with a flocculation tank. Pool dosing device 205.

As shown in Figure 4, further, the side wall of the curing tank body is provided with a curing tank water inlet 301 at the upper position, and the top of the curing tank body is provided with a curing tank mixer 302 extending into the curing tank body.

As shown in FIG. 5 , further, the sedimentation air flotation tank body is provided with an air distribution water skimming area 4A, an air flotation area 4D and an intermediate area between the two, and the intermediate area includes a horizontal inclined pipe filler 404 separated by The clear water area 4B located above the inclined pipe packing 404 and the coal slime area 4C located below the inclined pipe packing 404.

Among them, the water inlet 401 of the sedimentation air flotation tank is set at a position below the side wall of the water distribution and oil skimming zone 4A away from the middle zone, and the heavy mud hopper 406 and the light mud hopper 407 are both set at the bottom of the coal slime zone 4C.

Further, a vertical baffle 402 is arranged in the water and oil skimming area 4A, a front skimming pipe 403 is arranged on the side wall near the middle area of the water and oil skimming area 4A, and a horizontal overflow weir 405 is arranged in the clean water area 4B, The water distribution wall 410 is arranged in the air flotation area 4D near the middle area, the air flotation area 4D is provided with a pressurized air releaser 411 at the lower position of the side wall away from the middle area, and the bottom inner side of the air flotation area 4D is provided with a vertical The air flotation area 4D is provided with a rear oil skimmer 413 at a position close to the inside of its top, and the air flotation area 4D is provided with an air flotation area water outlet 414 at a position below the side wall away from the middle area.

Please refer further to FIG. 1 , which is a schematic structural diagram of a low-suspended-suspension oil-containing mine water treatment equipment for coal mines. As shown in FIG. 1 , the low suspended solids oily mine water treatment equipment for coal mines mainly includes a mixing tank 1 , a flocculation tank 2 , a maturation tank 3 and a sedimentation air flotation tank 4 . Among them, the mixing tank 1 is connected with the flocculation tank 2, the maturation tank 3 is connected with the sedimentation air flotation tank 4, and the mixing tank 1 and the flocculation tank 2 are connected with the sedimentation air flotation tank 4 respectively.

Please further refer to FIG. 2 , which is a schematic cross-sectional view of a mixing tank 1 used in a coal mine water treatment equipment for low suspended solids oily mine water. As shown in FIG. 2, the mixing tank 1 includes a mixing tank body, a mixing tank water inlet 101 is provided at the upper position of the side wall of the mixing tank body, and a mixing tank mixer 102 extending into the mixing tank body is provided on the top of the mixing tank body, A mixing pool water outlet 103 and a mixing pool return slime inlet 104 are provided at the lower position of the side wall of the mixing pool body, and a mixing pool dosing device 105 is provided on the top of the mixing pool body.

Please further refer to FIG. 3 , which is a schematic cross-sectional view of the flocculation tank 2 of the low suspended solids oil-containing mine water treatment equipment for coal mines. As shown in FIG. 3, the flocculation tank 2 includes a flocculation tank body. The flocculation tank body is provided with a flocculation tank water inlet 201 and a flocculation tank return slime inlet 204 at the lower position of the side wall of the flocculation tank body. The flocculation tank mixer 202 in the tank body, the flocculation tank water outlet 203 is provided at the upper position of the side wall of the flocculation tank body, and the flocculation tank dosing device 205 is provided on the top of the flocculation tank body.

Please further refer to FIG. 4 , which is a cross-sectional schematic diagram of the curing tank 3 of the low suspended solids oil-containing mine water treatment equipment for coal mines. As shown in FIG. 4 , the curing tank 3 includes a curing tank body, a curing tank water inlet 301 is provided at the upper position of the side wall of the curing tank body, and a curing tank mixer 302 extending into the curing tank body is provided on the top of the curing tank body, A curing tank water outlet 303 is provided at the lower position of the side wall of the curing tank body.

Please refer further to FIG. 5 , which is a schematic cross-sectional view of the sedimentation and degreasing tank 4 of the low suspended solids oil-containing mine water treatment equipment for coal mines. As shown in FIG. 5 , the sedimentation air flotation tank 4 includes a sedimentation air flotation tank body, and the sedimentation air flotation tank body is provided with an air distribution water skimming area 4A, an air flotation area 4D and an intermediate area located therebetween. The clear water area 4B located above the inclined pipe packing 404 and the slime area 4C located below the inclined pipe packing 404 are separated by the inclined pipe packing 404 . Among them, the water and oil skimming area 4A is provided with a sedimentation air flotation tank water inlet 401 at a position far from the side wall of the middle area, and a vertical baffle 402 is arranged in the water and oil skimming area 4A. The water and oil skimming area 4A is near the middle area. A front skimming pipe 403 is provided on the side wall of the . Among them, a horizontal overflow weir 405 is arranged in the clear water area 4B, and a heavy mud bucket 406 and a light mud bucket 407 are arranged at the bottom of the coal slime area 4C, both of which are inverted conical structures and have approximately the same size. The bottom of the mud hopper 407 is respectively provided with a heavy mud hopper slime return port 408 and a light mud hopper slime return port 409 . The water distribution wall 410 is arranged in the air flotation area 4D near the middle area, the air flotation area 4D is provided with a pressurized air releaser 411 at the lower position of the side wall away from the middle area, and the bottom inner side of the air flotation area 4D is provided with a vertical The air flotation area 4D is provided with a rear oil skimmer 413 at a position close to the inside of its top, and the air flotation area 4D is provided with an air flotation area water outlet 414 at a position below the side wall away from the middle area.

1 to 5, the mixing tank return slime inlet 104 and the flocculation tank return slime inlet 204 are respectively connected to the heavy mud hopper slime return port 408 and the light mud hopper slime return port 409. The water outlet 103 of the mixing tank is connected to the water inlet 201 of the flocculation tank. The water outlet 303 of the aging tank is connected to the water inlet 401 of the sedimentation air flotation tank. Still referring to Figures 1 to 5, the working principle and working process of the device are as follows:

Removal of suspended solids: The sewage enters the mixing tank 1 from the mixing tank inlet 101, the mixing agent (PAC) is added by the mixing tank dosing device 105, and the backflow flowing out of the heavy mud hopper slime return port 408 is added from the mixing tank return slime inlet 104 Coal slime provides the crystal nucleus for coagulation and sedimentation of the mixing tank 1. Under the stirring action of the mixing tank mixer 102, the suspended solids in the sewage collide and condense, and then the sewage flows into the mixing tank outlet 103 and the flocculation tank inlet 201 in turn. In flocculation tank 2, flocculant (PAM) is added from the flocculation tank dosing device 205, and the return slime flowing out from the slime return port 409 of the light mud bucket is added from the return slime inlet 204 of the flocculation tank. Under the stirring action of the flocculation tank mixer 202, the flocs increase, and then the sewage flows into the maturation tank 3 through the flocculation tank outlet 203 and the maturation tank inlet 301 in turn. Under the slow stirring action of the maturation tank mixer 302 , the flocs are matured and the density is increased, and then the sewage flows into the water distribution and oil skimming area 4A of the sedimentation air flotation tank 4 through the water outlet 303 of the maturation tank and the water inlet 401 of the sedimentation air flotation tank in turn. removal rate. Then the sewage flows upward along the inclined pipe packing 404 and enters the clean water area 4B to cause a "shallow pool effect", so that the particles settle to the bottom of the inclined pipe to be captured and fall off and collected by the overflow weir 405, and then the sewage passes through the sedimentation air flotation tank The guide wall 410 flows into the air flotation tank. The coal slime with high floc concentration and good settling performance is guided by the deflector 403 into the heavy mud hopper 406 at the bottom of the coal slime area 4C to form a return slime with a higher concentration, and the coal slime is returned to the coal by the pump from the heavy mud hopper. The mud outlet 408 is drawn out, and is returned to the mixing pool return slime inlet 104 of the mixing pool 1 through the corresponding heavy mud bucket return line. The rest of the slime enters into the light mud bucket 407 at the bottom of the slime area 4C, and is pumped out by the pump to return the coal slime from the light mud bucket backflow slime outlet 409, and returns to the flocculation pool of the flocculation pool 2 through the corresponding light mud bucket return line. Mud import 204. As a preference, a mud discharge port is respectively provided on the return line of the heavy mud hopper and the return line of the light mud hopper to discharge mud regularly.

Oil removal: The oily sewage enters the mixing tank 1 from the mixing tank inlet 101, and the mixture (PAC) is added by the mixing tank dosing device 105. After that, the sewage flows into the flocculation tank 2 through the mixing tank outlet 103 and the flocculation tank inlet 201 in turn. The flocculant (PAM) is added by the flocculation tank dosing device 205. PAC and PAM have the demulsification function for the oil. The sewage flows into the aging tank 3 through the flocculation tank outlet 203 and the aging tank inlet 301 in turn, and is broken in the aging tank. The emulsification reaction, the sewage after demulsification flows into the water distribution and oil skimming area 4A of the sedimentation air flotation tank 4 from the water outlet 303 of the maturation tank and the water inlet 401 of the sedimentation air flotation tank in turn, and the insoluble oil and the oil with low density after demulsification float up to the distribution water skimming. The water surface of the oil area 4A is skimmed off by the front oil skimming pipe 403, and the remaining oil is deposited into the conical mud hopper at the bottom of the coal slime area 4C through the coagulation and sedimentation reaction. It is collected by the overflow weir 405, and flows into the air flotation tank through the guide wall 410 of the sedimentation air flotation tank, and is fully mixed with the compressed air at the pressurized air releaser 411. As the air bubbles float to the water surface, they are skimming away from the rear oil skimming pipe 413 , and finally the sewage flows out from the outlet 414 .

In this embodiment, the coal slime backflow technology is used to strengthen the removal of low suspended solids, and at the same time, the coal slime backflow increases crystal nuclei for the coagulation and flocculation stage, and increases the chance of floc collision, thereby promoting the formation of flocs and improving the coagulation and flocculation sedimentation efficiency. In this embodiment, the coagulation and sedimentation of coagulation and flocculants (PAV and PAM) are used to simultaneously exert the demulsification effect. By adding an oil skimming pipe and an air flotation zone, the oil substances in the mine water are effectively removed, and an integrated equipment for coagulation, flocculation, sedimentation and oil removal is formed. It effectively integrates gravity degreasing, air flotation degreasing and coagulation and sedimentation technologies to reduce land occupation and greatly reduce investment costs.

In a specific embodiment, the influent suspended solids content of the mine water is 300mg/L, the petroleum content is 20mg/L, the coal slime reflux ratio is 20%, the PAC dosage is 30mg/L, and the PAM dosage is 20%. The amount of effluent is 0.25mg/L. After treatment, the content of suspended solids in the effluent can be ≤30mg/L, and the content of petroleum products can be 1.6 mg/L and ≤30mg/L. Compared with the traditional coagulation and sedimentation process, the removal rate of suspended solids is improved, the antidote rate of PAC and PAM is about 20%, and the removal rate of petroleum is increased from 40% to 92%.

Claims (7)

1. A low suspended matter oil-bearing mine water treatment device for coal mines is characterized by comprising a mixing tank (1), a flocculation tank (2), a curing tank (3) and a sedimentation air floatation tank (4),

wherein, the mixing tank (1) comprises a mixing tank body, the position of the side wall of the mixing tank body below is provided with a mixing tank water outlet (103) and a mixing tank backflow coal slime inlet (104), the flocculation tank (2) comprises a flocculation tank body, the position of the side wall of the flocculation tank body below is provided with a flocculation tank water inlet (201) and a flocculation tank backflow coal slime inlet (204), the mixing tank water outlet (103) is communicated with the flocculation tank water inlet (201),

wherein, curing pond (3) are including the curing pond body, the lateral wall of curing pond body leans on the position of below to be provided with curing pond delivery port (303), sediment air supporting pond (4) are including deposiing the air supporting pond body, the lateral wall of sediment air supporting pond body leans on the position of below to set up sediment air supporting pond water inlet (401) just the bottom of sediment air supporting pond body is provided with heavy mud fill (406) and light mud fill (407), curing pond delivery port (303) and sediment air supporting pond water inlet (401) intercommunication, heavy mud fill (406) with light mud fill (407) respectively with mixed pond backward flow coal slime import (104) with flocculation basin backward flow coal slime entry (204) intercommunication.

2. The oil mine water treatment equipment with low suspended solids for the coal mine according to claim 1, wherein the heavy mud bucket (406) and the light mud bucket (407) are both inverted cone structures, the bottoms of the heavy mud bucket (406) and the light mud bucket (407) are respectively provided with a heavy mud bucket coal slurry return port (408) and a light mud bucket coal slurry return port (409), and the heavy mud bucket coal slurry return port (408) and the light mud bucket coal slurry return port (409) are respectively communicated with the heavy mud bucket (406) and the light mud bucket (407).

3. The oil mine water treatment equipment with low suspended solids for the coal mine according to claim 1, wherein a mixing tank water inlet (101) is arranged at a position close to the upper part of the side wall of the mixing tank body, a mixing tank stirrer (102) extending into the mixing tank body is arranged at the top of the mixing tank body, and a mixing tank dosing device (105) is arranged at the top of the mixing tank body.

4. The coal mine low-suspended solid oil-bearing mine water treatment equipment is characterized in that a flocculation tank stirrer (202) extending into the flocculation tank body is arranged at the top of the flocculation tank body, a flocculation tank water outlet (203) is formed in the position, close to the upper side, of the side wall of the flocculation tank body, and a flocculation tank dosing device (205) is arranged at the top of the flocculation tank body.

5. The oil mine water treatment equipment with low suspended solids for the coal mine according to claim 1, wherein a slaking tank water inlet (301) is arranged at a position close to the upper part of the side wall of the slaking tank body, and a slaking tank stirrer (302) extending into the slaking tank body is arranged at the top of the slaking tank body.

6. The low-suspended solid oil-bearing mine water treatment equipment for the coal mine according to claim 1, characterized in that an air distribution oil skimming area (4A), an air flotation area (4D) and an intermediate area between the two are arranged in the sedimentation air flotation tank body, and the intermediate area comprises a clear water area (4B) and a coal slurry area (4C) which are separated by transverse inclined tube filling materials (404) and are positioned above the inclined tube filling materials (404);

wherein, deposit air supporting pond water inlet (401) set up in water distribution oil skimming district (4A) is kept away from the lateral wall of intermediate zone leans on the position of below, heavy mud fill (406) with light mud fill (407) all set up in the bottom in coal slime district (4C).

7. The oil-bearing mine water treatment equipment with low suspended matter for coal mine according to claim 6, it is characterized in that a vertical baffle (402) is arranged in the water distribution and oil skimming area (4A), the side wall of the water distribution oil skimming area (4A) close to the middle area is provided with a front oil skimming pipe (403), a transverse overflow weir (405) is arranged in the clear water zone (4B), a water distribution wall (410) is arranged at the position of the air floatation zone (4D) close to the middle zone, the air floating area (4D) is provided with a pressurized air releaser (411) at the position far away from the lower part of the side wall of the middle area, a vertical flow reversing plate (412) is arranged on the inner side of the bottom of the air floating zone (4D), a rear oil skimming cylinder (413) is arranged at the position of the air flotation zone (4D) close to the inner side of the top of the air flotation zone, and an air flotation zone water outlet (414) is arranged at the position of the air flotation zone (4D) far away from the lower part of the side wall of the middle zone.

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