Recycling and purifying treatment device for oil-containing mine water

Abstract

The utility model discloses a recycling and purifying treatment device for oil-containing mine water, and belongs to the technical field of wastewater treatment. The system comprises a water inlet sedimentation tank, a coagulation air floatation tank, a middle water tank and a ceramic membrane system which are sequentially communicated in the treatment direction of oil-containing mine water, clear water filtered by the ceramic membrane system enters a clear water tank, intercepted concentrated water enters a concentrated water tank, the concentrated water tank is connected with the middle water tank, and an activated carbon adsorption filter tank and a water producing tank are sequentially communicated in the water outlet direction of the clear water tank. Effluent of the water producing pool is discharged or recycled. According to the utility model, petroleum in the mine water is subjected to multi-stage treatment, so that the standard treatment of petroleum hydrocarbon is realized, and the recycling and discharging requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field, concretely relates to a kind of reuse purification treatment device of oil-containing mine water. BACKGROUND

[0002] Mine water is the water from underground to ground in the process of coal production, characterized by containing coal dust, suspended solids, black, and being polluted by coal, gear oil, hydraulic oil, emulsion, etc., and containing a certain amount of petroleum in mine water, which belongs to slightly polluted groundwater, and the water quantity is large, and the mine water can be reused as mine miscellaneous water after treating suspended solids and petroleum, etc.In the western region where coal is more and water is less, the treatment and reuse of slightly polluted mine water have important environmental protection significance, and by treating and reusing mine water, important water source can be provided for mine area, dependence on other water sources is reduced, and pollution to ecological environment is reduced.Suspended solids in mine water can be effectively removed by sedimentation and filtration, but it is difficult to remove petroleum pollutants deeply because of its emulsification and dissolution in water. SUMMARY

[0003] To solve the deep treatment of petroleum pollutants in mine water, the utility model provides a kind of reuse purification treatment device of oil-containing mine water, which is first treated by pre-treatment coagulation and demulsification, and the suspended oil is removed by air flotation, then most of the emulsified petroleum is intercepted by ceramic membrane system, and finally the oil is deeply adsorbed by activated carbon adsorption, so that the suspended solids and petroleum pollutants are deeply treated by multi-stage physicochemical treatment, the petroleum in effluent reaches below 0.05mg / L, meets the reuse requirements, and meets the requirements of the III standard in the Surface Water Environmental Quality Standard (GB3838-2002).

[0004] The utility model discloses a kind of reuse purification treatment device of oil-containing mine water, comprising: water inlet sedimentation tank, coagulation air flotation tank, intermediate water pool and ceramic membrane system sequentially communicated along the processing direction of oil-containing mine water, the clear water filtered by the ceramic membrane system enters clear water tank, and the concentrated water intercepted enters concentrated water tank, the concentrated water tank is connected with the intermediate water pool, and there is activated carbon adsorption filter tank and water production tank sequentially communicated in the water outlet direction of the clear water tank, and the water outlet of the water production tank is discharged or reused.

[0005] As a further improvement of the utility model, it further includes: sludge tank and sludge filter press;

[0006] The sludge outlet of the water inlet sedimentation tank and the coagulation air flotation tank is connected with the sludge tank, and the sludge tank is connected with the sludge filter press.

[0007] As a further improvement of the present application, the coagulation air flotation tank comprises a coagulation zone, a flocculation zone and an air flotation zone which are communicated in sequence along the treatment direction of the oil-containing mine water, a PAC dosing device and a stirrer are matched on the coagulation zone, a PAM dosing device is matched on the flocculation zone, and an aeration device is matched on the bottom of the air flotation zone.

[0008] As a further improvement of the present application, the intermediate water tank is matched with an acid-base adjusting device for adjusting the pH of the water sample to 6-7.

[0009] As a further improvement of the present application, the ceramic membrane system is a tubular ceramic ultrafiltration membrane, the micropore diameter of the tubular ceramic membrane is less than 0.1 μm, and the tubular ceramic membrane operates in a cross-flow filtration mode.

[0010] As a further improvement of the present application, the activated carbon adsorption filter tank is filled with coconut shell granular activated carbon, the particle size of the coconut shell granular activated carbon is 8-30 meshes, the iodine value is greater than 1000 mg / g, and the activated carbon is used for deep adsorption of the petroleum.

[0011] As a further improvement of the present application, the ceramic membrane system and the activated carbon adsorption filter tank are matched with a backwashing water pump, the surface of the tubular ceramic membrane and the activated carbon are flushed through backwashing, and the pollution blockage is reduced; and the backwashing water of the ceramic membrane system and the activated carbon adsorption filter tank enters the water inlet sedimentation tank.

[0012] Compared with the prior art, the present application has the following beneficial effects:

[0013] The treatment device can be applied to the treatment of slightly polluted mine water, especially oil-containing mine water with high suspended solids, and through the multi-stage treatment of pre-deposition, coagulation air flotation, ceramic membrane system and activated carbon adsorption filter tank, the suspended solids and SS are deeply removed, and the reuse and external drainage requirements are met. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The present application discloses a reuse purification treatment device for oil-containing mine water.

[0015] In the drawings:

[0016] 1, water inlet sedimentation tank; 2, coagulation air flotation tank; 3, intermediate water tank; 4, ceramic membrane system; 5, clean water tank; 6, thick water tank; 7, activated carbon adsorption filter tank; 8, water production tank; 9, sludge tank; 10, sludge filter press. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0018] The utility model will be described in further detail in combination with the drawings:

[0019] As Figure 1 Indicated, the utility model provides a kind of oil-containing mine water's reuse purification treatment device, comprising: water inlet sedimentation tank 1, coagulation air flotation tank 2, intermediate water pool 3 and ceramic membrane system 4 are sequentially communicated along the processing direction of oil-containing mine water, the clear water filtered by ceramic membrane system 4 enters clear water tank 5, and the concentrated water retained enters concentrated water tank 6, and concentrated water tank 6 is connected with intermediate water pool 3, and there is activated carbon adsorption filter tank 7 and water production tank 8 in the water outlet direction of clear water tank 5 sequentially communicated, and the water outlet of water production tank 8 is discharged or reused;The sludge outlet of water inlet sedimentation tank 1 and coagulation air flotation tank 2 is connected with sludge tank 9, and sludge tank 9 is connected with sludge filter press 10.

[0020] Specifically:

[0021] Oil-containing mine water under well is lifted to water inlet sedimentation tank 1 by lifting pump, and coal dust and other particulate matters in water are settled and removed in water inlet sedimentation tank 1 by gravity;The bottom of water inlet sedimentation tank 1 is matched with sludge pump, and the sludge settled by gravity is discharged into sludge tank 9;The supernatant in the upper portion of water inlet sedimentation tank 1 is pumped into coagulation air flotation tank 2 by liquid outlet.

[0022] The coagulation air flotation tank 2 of the utility model includes coagulation zone, flocculation zone and air flotation zone sequentially communicated along the processing direction of oil-containing mine water, PAC dosing device and agitator are matched on the coagulation zone, PAM dosing device is matched on the flocculation zone, and aeration device is matched at the bottom of the air flotation zone;Among them, PAC dosing device and PAM dosing device all include dosing tank and medicine pipe, medicine pipe is connected with dosing port of coagulation zone or flocculation zone, and valve and flowmeter are arranged on medicine pipe;The aeration device is the commonly used aeration pipe, which is connected with external fan. The utility model breaks the emulsified oil by adding PAC, forms large floc by adding PAM to capture suspended matter and other nets, and removes suspended matter and floating oil by dissolved air flotation.

[0023] The intermediate water pool 3 of the utility model is matched with acid-base adjusting device, for adjusting the pH of water sample to 6-7;Among them, acid-base adjusting device includes dosing tank and medicine pipe, medicine pipe is connected with dosing port of intermediate water pool 3, and valve and flowmeter are arranged on medicine pipe.

[0024] The sewage of the intermediate pool 3 enters the ceramic membrane system 4 through the water inlet high-pressure pump, the ceramic membrane system is a tubular ceramic ultrafiltration membrane, has strong oil-water separation capacity and strong anti-fouling capacity, the ceramic membrane micropore diameter is less than 0.1 μm, the ceramic membrane adopts cross-flow filtration mode operation, the emulsified oil molecules are intercepted through the micropore, the clean water passes through the micropore membrane and enters the clean water tank 5, and the intercepted oil-containing sewage enters the concentrated water tank 6 and is pumped back to the front end intermediate pool 3 for secondary treatment.

[0025] The active carbon adsorption filter tank 7 of the utility model is filled with coconut shell granular activated carbon, the particle size of the coconut shell granular activated carbon is 8-30 meshes, the iodine value is greater than 1000 mg / g, and the activated carbon is used for deep adsorption of petroleum.

[0026] The ceramic membrane system 4 and the active carbon adsorption filter tank 7 are matched with a backwashing water pump, the tubular ceramic membrane surface and the activated carbon are flushed through backwashing, the membrane surface fouling is reduced, and the membrane high-flux operation is maintained, and the backwashing water of the ceramic membrane system and the active carbon adsorption filter tank enters the water inlet sedimentation tank 1.

[0027] The utility model provides a kind of reuse purification treatment method of oil-containing mine water, comprising:

[0028] Step 1, oil-containing mine water is lifted from underground and enters water inlet sedimentation tank 1 to carry out preliminary gravity sedimentation, most of black coal particles are preliminarily deposited, and supernatant with less suspended matter is obtained.

[0029] Step 2, the effluent of water inlet sedimentation tank 1 is lifted and enters coagulation air flotation tank 2, then PAC is added in coagulation stirring zone, PAM is added in flocculation zone, suspended matter and suspended oil are separated from water by micro-bubble effect in dissolving gas zone, and air flotation effluent enters intermediate pool 3.

[0030] Step 3, pH adjusting device is arranged in intermediate pool 3, acid-base pump is started and stopped by pH meter interlocking control, and pH is adjusted to 6-6.5 range.

[0031] Step 4, sewage of intermediate pool 3 is lifted and enters tubular ceramic membrane system 4 through high-pressure water inlet pump, ceramic membrane micropore diameter <0.1 μm is selected, cross-flow filtration mode is used for operation, and tubular membrane operating pressure is about 0.3 MPa.

[0032] Step 5, clean water produced by ceramic membrane system 4 through membrane element enters clean water tank 5, high-concentration sewage intercepted enters concentrated water tank 6, and sewage in concentrated water tank 6 is backflowed to intermediate pool 3 for secondary treatment through ceramic membrane process.

[0033] Step 6, the clean water of the clean water tank 5 enters the activated carbon adsorption filter tank 7 through the lifting pump, and the oil in the mine water is further intercepted through the coconut shell activated carbon, so that the oil pollutants in the tail water meet the standard. The water produced by the activated carbon adsorption filter tank 7 enters the water production tank 8; wherein, the ceramic membrane system 4 and the activated carbon adsorption system 7 are matched with a backwashing water pump, the surface of the membrane assembly and the activated carbon are washed through backwashing, and the pollution is reduced.

[0034] Step 7, the sludge produced by the water inlet sedimentation tank 1 and the coagulation air flotation tank 2 enters the sludge tank 9, and the sludge in the sludge tank 9 is dewatered by the sludge filter press 10, and the water content is reduced to below 60% for external transportation.

[0035] Taking the mine water of a project in the west as an example, the oil-containing mine water contains about 1200mg / L of SS and 0.97mg / L of oil, and after the above device is processed, the oil in the effluent can be reduced to below 0.05mg / L, meeting the requirements of the III standard of the Surface Water Environmental Quality Standard (GB3838-2002) for reuse and external discharge.

[0036] The advantages of the utility model are:

[0037] The treatment device can be applied to the treatment of slightly polluted mine water, especially oil-containing mine water with high suspended solids, through pre-deposition, coagulation air flotation, ceramic membrane system and activated carbon adsorption filter tank, the suspended solids and SS are deeply removed, and the reuse and external discharge requirements are met. And the devices used in the utility model can only be combined and used in a specific order to make the water meet the discharge requirements.

[0038] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for the reuse and purification of oil-bearing mine water, characterized in that, include: Along the treatment direction of oil well water, an inlet sedimentation tank, a coagulation flotation tank, an intermediate water tank, and a ceramic membrane system are connected in sequence. The clear water filtered by the ceramic membrane system enters the clear water tank, and the retained concentrate enters the concentrate tank. The concentrate tank is connected to the intermediate water tank. An activated carbon adsorption filter and a product water tank are connected in sequence along the outlet direction of the clear water tank. The effluent from the product water tank is discharged or reused.

2. The oil well water reuse and purification treatment device as described in claim 1, characterized in that, Also includes: Sludge tanks and sludge filter presses; The sludge outlets of the influent sedimentation tank and the coagulation flotation tank are connected to the sludge tank, and the sludge tank is connected to the sludge filter press.

3. The oil well water reuse and purification treatment device as described in claim 1, characterized in that, The coagulation-flotation tank includes a coagulation zone, a flocculation zone, and a flotation zone connected sequentially along the treatment direction of the oil well water. The coagulation zone is equipped with a PAC dosing device and a stirrer, the flocculation zone is equipped with a PAM dosing device, and the bottom of the flotation zone is equipped with an aeration device.

4. The oil well water reuse and purification treatment device as described in claim 1, characterized in that, The intermediate water tank is equipped with an acid-base adjustment device to adjust the pH of the water sample to 6-7.

5. The oil well water reuse and purification treatment device as described in claim 1, characterized in that, The ceramic membrane system is a tubular ceramic membrane with a micropore diameter of less than 0.1 μm, and the tubular ceramic membrane operates in a cross-flow filtration mode.

6. The oil well water reuse and purification treatment device as described in claim 1, characterized in that, The activated carbon adsorption filter is filled with coconut shell granular activated carbon, the particle size of which is 8-30 mesh and the iodine value is greater than 1000 mg / g.

7. The oil well water reuse and purification treatment device as described in claim 1, characterized in that, The ceramic membrane system and activated carbon adsorption filter are equipped with a backwash water pump, which backwashes the surface of the tubular ceramic membrane and the activated carbon. The backwash water from the ceramic membrane system and activated carbon adsorption filter enters the influent sedimentation tank.

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