CN215208965U - Dense medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device - Google Patents
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- CN215208965U CN215208965U CN202120885870.7U CN202120885870U CN215208965U CN 215208965 U CN215208965 U CN 215208965U CN 202120885870 U CN202120885870 U CN 202120885870U CN 215208965 U CN215208965 U CN 215208965U
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Abstract
The invention discloses a heavy medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device, which comprises a pretreatment tank, a coagulation tank, a reaction tank, a clarification tank, a heavy medium recovery system and a sludge tank, wherein a partition plate is arranged in the pretreatment tank, a first water outlet is arranged above the partition plate, oil absorption sponge is arranged on the left side of the first water outlet, an inclined plane is arranged on the bottom plane below the left side of the partition plate, the pretreatment tank is connected with the coagulation tank and the reaction tank, an upper stirring device and a lower stirring device are arranged right above the two tanks, a medicine feeding port is arranged on one side of the pretreatment tank, a water outlet pipe of the reaction tank is connected in a filter cover of the clarification tank, a third water outlet is arranged below the clarification tank, the reaction tank is connected with the heavy medium recovery system and the sludge tank below the filter cover, a horizontal filter plate is arranged in the sludge tank, a mud pressing device is arranged above the filter plate, and a return pipe is arranged below the sludge tank, the heavy medium floc is formed to treat water, the treated effluent stably reaches the standard; and the impact load resistance is strong, the cost is low, the occupied area is small, and the method is worthy of popularization.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device.
Background
Shale gas is a novel unconventional natural gas, the development of the shale gas has the characteristics of long production period, long exploitation life, large gas containing area, short hydrocarbon migration distance and the like, and the shale gas is rich in resource reserves and becomes a new bright point for global oil and gas resource development. The shale gas yield in China can reach hundreds of millions of cubic meters at present, which can bring great economic benefits to China and can influence the world energy pattern, so the development of the shale gas is imperative.
In the process of exploiting the shale gas, a large amount of water is needed, the hydraulic fracturing technology is used for breaking underground rock stratums and releasing the shale gas in the underground rock stratums, and the water injected into the underground rock stratums can be flowback at different stages of gas production of the shale gas, so that the water is called as produced water. At present, the volume fracturing technology of a slickwater system and the long-well-section horizontal well technology are the most widely applied technologies in shale gas exploitation sites. The produced water flowback stage has the characteristics of complex water quality components, large water yield, low salt content, multiple pollutant types, high COD (chemical oxygen demand), high TDS (total dissolved solids), high TSS (total suspended solids), high wastewater concentration, complex components, difficult degradation, high treatment difficulty, poor shale gas produced water treatment effect of common biological treatment methods and physical chemical methods, high cost, large equipment floor area and poor impact load resistance, and needs to be improved.
Disclosure of Invention
In order to solve the problems, the invention discloses a heavy medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device which is low in cost, strong in impact load resistance, good in treatment effect, small in occupied area, convenient to operate and manage, quick to start, wide in application range and long in service life.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a heavy medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device comprises a pretreatment tank, a coagulation tank, a reaction tank, a clarification tank, a heavy medium recovery system and a sludge tank, wherein a partition plate is arranged inside the pretreatment tank, a water inlet is arranged below the left side of the pretreatment tank, a first water outlet is arranged above the partition plate, a platform frame with a groove is arranged on the left side of the first water outlet, an oil absorption sponge is arranged in the groove, the oil absorption sponge is as high as the first water outlet, the bottom plane below the left side of the partition plate is an inclined plane, a sludge discharge port is arranged below the water inlet, a movable window is arranged above the pretreatment tank, a second water outlet is arranged below the left side of the pretreatment tank, the pretreatment tank is connected with the coagulation tank, a first oil cylinder is arranged right above the coagulation tank, a telescopic rod of the first oil cylinder extends into the coagulation tank, a first mixing plate is arranged on the side of a telescopic rod of the first oil cylinder, a first chemical feeding port is arranged on one side of the first oil cylinder, the coagulating basin is connected with the reaction tank, be equipped with hydro-cylinder two directly over the reaction tank, the telescopic link of hydro-cylinder two stretches into in the reaction tank, and the telescopic link side of hydro-cylinder two is equipped with thoughtlessly flitch two, and one side of hydro-cylinder two is equipped with medicine mouth two and medicine mouth three, be equipped with the filter mantle that the filter screen formed in the clarification tank, in the filter mantle of play water piping connection clarification tank of reaction tank, the clarification tank top is equipped with the detection mouth, and clarification tank side below is equipped with delivery port three, heavy medium recovery system is connected with the filter mantle below in the reaction tank, heavy medium recovery system connects the sludge impoundment, the inside horizontally filter that is equipped with of sludge impoundment, the filter top is equipped with mud pressing device, and the sludge impoundment below is equipped with the wet return.
As an improvement of the invention, the inner wall of the pretreatment tank is provided with an anticorrosive layer.
As an improvement of the invention, the inclined angle of the lower inclined plane on the left side of the clapboard is 20-30 degrees.
As an improvement of the invention, the water inlet, the first water outlet, the second water outlet, the third water outlet and the return pipe are provided with control valves.
As an improvement of the invention, one or two of the mixing plates are in a plum petal shape.
As an improvement of the invention, one or two mixing plates are arranged in an upper-lower double layer mode.
As an improvement of the invention, the dense medium recovery system is a magnetic drum device.
As an improvement of the sludge pressing device, the sludge pressing device comprises a third oil cylinder on one side of the sludge tank, a telescopic rod of the third oil cylinder extends into the sludge tank, the telescopic rod of the third oil cylinder is connected with a push plate, and the lower edge of the push plate is attached to a filter plate.
As an improvement of the invention, the water return pipe is communicated with the water inlet.
The invention relates to a heavy medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device, which comprises the following steps:
(1) shale gas produced water enters the left side of the pretreatment tank from a water inlet, the water level rises to a certain height of a water outlet, floating oil floating on the water surface is absorbed by the oil absorption sponge, the rest water flows into the right side of the pretreatment tank, a movable window above the pretreatment tank is opened, the oil absorption sponge can be replaced, a medium can be added to the right side of the pretreatment tank to neutralize the pH value of the water, impurity sludge in the water is deposited on an inclined surface below the left side of the pretreatment tank, the shale gas produced water enters the pretreatment tank to realize the separation of water, oil and mud,
(2) the water in the step (1) enters a coagulation tank, ferric sulfate is added from a dosing port I as a coagulant, an oil cylinder is started to drive a mixing plate I to move up and down to completely melt the ferric sulfate into the shale gas produced water,
(3) the water in the step (2) enters a reaction tank, polyacrylamide is added from a chemical adding port II to serve as a flocculating agent, gamma-ferrimagnetic nanoparticles serving as dense medium particles are added from a chemical adding port III, a cylinder II is started to drive a material mixing plate II to move up and down, the flocculating agent and the dense medium particles are completely melted into the shale gas produced water to form flocs taking the dense medium particles as cores, and the flocs are deposited below the reaction tank;
(4) the water in the step (3) enters a filter cover in the clarification tank, the filtered water is discharged after being detected to be qualified, and flocs in the filter cover are deposited below the filter cover;
(5) discharging flocs below the reaction tank and the filtering cover into a dense medium recovery system, and sucking out a magnetic dense medium by using a magnetic drum device;
(6) and (5) the water enters a sludge tank, sludge is pressed into a mud cake and taken out for treatment, and the residual water returns to the pretreatment tank.
The invention has the beneficial effects that:
(1) strong impact load resistance:
under the condition of changing water quality and water quantity, the treated effluent stably reaches the standard by adjusting the formula or adjusting the adding amount of a water treatment agent; and even if the water is not pretreated, the water can still keep higher removal effect when being directly input into the coagulation tank, the pollutants in the water can be greatly removed,
(2) the operation cost is low:
the total power consumption of the purification device is 3/4% lower than that of the conventional treatment process, and the operation cost is 30-40% lower; the magnetic heavy medium can be recycled and recycled in the system, the recovery rate is 99 percent,
(3) the treatment effect is good:
the effluent quality is comparable to that of the ultrafiltration membrane effluent, and the magnetic flocculation process can effectively remove particulate pollutants, microbial pollutants and part of pollutants dissolved in water from the water, such as: COD, TDS, TSS, BOD, suspended matter, total phosphorus, chroma, turbidity, etc.,
(4) the occupied area is small:
compared with the traditional coagulating sedimentation method, the method has less 2/3, saves a great amount of land resources, can be set into a mobile treatment workshop or a mobile equipment treatment vehicle and the like, and is particularly suitable for areas with short land resources;
(5) the operation management is simple:
the integrated treatment equipment is module nested or skid-mounted equipment, is simple to operate and maintain, has few operating personnel, long service life and short construction period, and is easy to expand and move.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a schematic diagram of a pretreatment tank according to the present invention.
FIG. 3 is a schematic view of a coagulation basin according to the present invention.
FIG. 4 is a schematic view of a reaction cell according to the present invention.
FIG. 5 is a schematic view of a clarifier according to the present invention.
Fig. 6 is a schematic diagram of a dense medium recovery system according to the present invention.
FIG. 7 is a schematic view of a sludge pond according to the present invention.
Fig. 8 is a schematic view of a mixing plate according to the present invention.
List of reference numerals:
1. the device comprises a pretreatment tank, 2, a coagulation tank, 3, a reaction tank, 4, a clarification tank, 5, a heavy medium recovery system, 6, a sludge tank, 7, a partition plate, 8, a water inlet, 9, a first water outlet, 10, a platform frame, 11, an oil absorption sponge, 12, an inclined plane, 13, a sludge discharge port, 14, a movable window, 15, a second water outlet, 16, a first oil cylinder, 17, a first mixing plate, 18, a first medicine feeding port, 19, a second oil cylinder, 20, a second mixing plate, 21, a second medicine feeding port, 22, a third medicine feeding port, 23, a filter cover, 24, a detection port, 25, a third water outlet, 26, a filter plate, 27, a mud pressing device, 28, a third oil cylinder, 29, a push plate, 30, a water return pipe, 31, a control valve, 32 and a magnetic drum device.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in the figure, the high-efficiency integrated shale gas extraction water purification device with dense medium magnetic coagulation comprises a pretreatment tank 1, a coagulation tank 2, a reaction tank 3, a clarification tank 4, a dense medium recovery system 5 and a sludge tank 6, wherein a partition plate 7 is arranged inside the pretreatment tank 1, a water inlet 8 is arranged below the left side of the pretreatment tank, a water outlet I9 is arranged above the partition plate 7, a platform frame 10 with a groove is arranged on the left side of the water outlet I, an oil absorption sponge 11 is arranged in the groove, the oil absorption sponge 11 is equal to the water outlet I9 in height, the bottom plane below the left side of the partition plate is an inclined plane 12, a sludge discharge port 13 is arranged below the water inlet 8, a movable window 14 is arranged above the pretreatment tank 1, a water outlet II 15 is arranged below the left side of the pretreatment tank 2, a first oil cylinder 16 is arranged right above the coagulation tank 2, and a telescopic rod of the first oil cylinder 16 extends into the coagulation tank 2, a first mixing plate 17 is arranged on the side surface of a telescopic rod of a first oil cylinder, a first dosing port 18 is arranged on one side of the first oil cylinder, the coagulation tank 2 is connected with the reaction tank 3, a second oil cylinder 19 is arranged right above the reaction tank 3, the telescopic rod of the second oil cylinder 19 extends into the reaction tank 3, a second mixing plate 20 is arranged on the side surface of the telescopic rod of the second oil cylinder, a second dosing port 21 and a third dosing port 22 are arranged on one side of the second oil cylinder 19, a filter cover 23 formed by a filter screen is arranged in the clarification tank 4, a water outlet pipe of the reaction tank 3 is connected with the filter cover 23 of the clarification tank 4, a detection port 24 is arranged above the clarification tank, a third water outlet 25 is arranged below the clarification tank 4, a heavy medium recovery system 5 is connected below the reaction tank 3 and the filter cover 23, the heavy medium recovery system 5 is connected with a sludge tank 6, a horizontal filter plate 26 is arranged inside the sludge tank 6, and a sludge pressing device 27 is arranged above the filter plate 26, a return pipe 28 is arranged below the sludge tank 6.
The invention relates to a heavy medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device, which is characterized in that shale gas extraction water firstly enters the left side of a pretreatment pool 1 from a water inlet 8 during working, the water level is gradually raised, when the water level is raised to a height of a water outlet of 9, floating oil floating on the water surface is absorbed by an oil absorption sponge 11, the rest water flows into the right side of the pretreatment pool 1, a movable window 14 above the pretreatment pool 1 is opened, the oil absorption sponge 11 can be replaced, the PH value of medium neutralization water can also be added to the right side of the pretreatment pool 1, impurity sludge in the water is deposited on an inclined surface 12 below the left side of the pretreatment pool 1, the shale gas extraction water enters the pretreatment pool to realize the separation of water, floating oil and sludge, impurities in the water are eliminated, unstable factors are eliminated for the subsequent adoption of magnetic heavy medium for purifying the water quality, the purification effect is good, in addition, the water inlet 8 and the water outlet two 15 are both arranged at low positions, there will not be too much residual water.
The bottom plane below the left side of the clapboard is the inclined plane 12, and the sludge discharge port 13 is opened without power to discharge sludge, so that the clapboard is convenient and practical.
According to the invention, the left side of the water outlet I9 is provided with the platform frame 10 with the groove, the area of the groove is smaller than that of the oil absorption sponge 11, the oil absorption sponge 11 is plugged in the groove, the water level on the left side of the pretreatment tank 1 slowly rises and flows into the right side of the pretreatment tank 1, the impact force is not large, the oil absorption sponge 11 cannot be washed away, but the movable window 14 above the pretreatment tank 1 is opened, so that an operator can easily replace the oil absorption sponge 11, and the oil absorption effect is ensured.
The water in the pretreatment tank 1 enters a coagulation tank 2, ferric sulfate is added as a coagulant from a first dosing port 18, a first oil cylinder 16 is started to drive a first mixing plate 17 to move up and down to completely melt the ferric sulfate into the shale gas produced water, then the water enters a reaction tank 3, polyacrylamide is added as a flocculant from a second dosing port, gamma-ferrimagnetic nanoparticles are added from a third dosing port to serve as heavy medium particles, flocs with the heavy medium particles as cores are formed in the shale gas produced water, however, the flocculant and the heavy medium particles are added in such a way, the reaction degree is not enough, the purification effect is influenced, and in order to overcome the defect, the water is stirred by moving the second mixing plate 20 in a plum petal shape up and down, the second mixing plate 20 in the plum petal shape can generate vortexes when moving up and down, so that the flocculant and the heavy medium are fully cured, the flocs are larger in volume, the occupied space is smaller on the premise of the same effect, and the method is worthy of popularization and application; in order to increase the curing effect, the second mixing plate 20 adopts an upper-lower double-layer structure, so that the working efficiency is improved, and on the other hand, the second mixing plate 20 can be lifted up after purification is finished, so that the second mixing plate 20 is prevented from being soaked in water with corrosivity for a long time, and the service life is shortened.
The invention adopts gamma-Fe 2O3 as dense medium particles to replace traditional magnetic powder and micro-sand, the particles are small, the mass is heavy, the particles are insoluble in water and have magnetism, and after flocs with gamma-Fe 2O3 as a core are formed in a water body, the flocs can be rapidly settled by the specific gravity of the flocs, so that pollutants can be rapidly separated from the water body and are settled below a reaction tank.
The water after reaction treatment enters a filter cover 23 in the clarification tank 4, heavy medium flocs possibly brought in can be remained in the filter cover 23, the filtered water is discharged after being detected to be qualified, the flocs in the filter cover are settled below the filter cover 23, then the flocs below the reaction tank 3 and the filter cover 23 are discharged into a heavy medium recovery system 5, the magnetic heavy medium is sucked out by a magnetic drum device 32 and can be recycled, and the recovery rate is more than 99%.
Remaining sewage gets into sludge impoundment 6, and sludge impoundment inside is equipped with the horizontally filter, and the filter top is equipped with presses mud device 27, presses mud device to include three 28 of hydro-cylinder of sludge impoundment one side, and the telescopic link of three of hydro-cylinder stretches into in the sludge impoundment, and push pedal 29 is connected to the telescopic link of three of hydro-cylinder, the push pedal lower limb pastes on filter 26, starts three 28 of hydro-cylinder push pedal 29 and removes and presses mud into the mud cake and take out the processing, and remaining water returns the preliminary treatment pond.
The corrosion of the shale gas produced water which just enters the pretreatment tank 1 is very strong, and the inner wall of the pretreatment tank 1 is provided with the polytetrafluoroethylene anticorrosive layer, so that the service life of the pretreatment tank 1 is long.
The inclined angle of the inclined plane 12 below the left side of the clapboard is 20-30 degrees, the outlet is at the lowest position, the mud is discharged quickly by utilizing gravity and pressure during discharging, and the power output is reduced.
According to the invention, the control valves 31 are arranged on the water inlet, the water outlet I, the water outlet II, the water outlet III and the water return pipe, so that the flow can be controlled according to specific conditions.
According to the shale gas extraction water purification device, polluted components of water quality are treated by forming the dense medium flocs, and the treated effluent stably reaches the standard; and the impact load resistance is strong, even if the pretreatment is not carried out, the water is directly input into the coagulation tank, the higher removal effect can still be kept, pollutants in the water can be removed greatly, the cost is low, the occupied area is small, and the method is worthy of popularization.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.
Claims (9)
1. The utility model provides a high-efficient integration shale gas of dense medium magnetism thoughtlessly congeals water purification installation which characterized in that: the pretreatment device comprises a pretreatment tank, a coagulation tank, a reaction tank, a clarification tank, a dense medium recovery system and a sludge tank, wherein a partition plate is arranged inside the pretreatment tank, a water inlet is arranged below the left side of the pretreatment tank, a water outlet I is arranged above the partition plate, a platform frame with a groove is arranged on the left side of the water outlet I, an oil absorption sponge is arranged in the groove, the oil absorption sponge is as high as the water outlet I, the bottom plane below the left side of the partition plate is an inclined plane, a sludge discharge port is arranged below the water inlet, a movable window is arranged above the pretreatment tank, a water outlet II is arranged below the left side of the pretreatment tank, the pretreatment tank is connected with the coagulation tank, a first oil cylinder is arranged right above the coagulation tank, a telescopic rod of the first oil cylinder extends into the coagulation tank, a first mixing plate is arranged on the side of the telescopic rod of the first oil cylinder, a first chemical feeding port is arranged on one side of the first oil cylinder, the coagulation tank is connected with the reaction tank, a second oil cylinder is arranged right above the reaction tank, the telescopic link of hydro-cylinder two stretches into in the reaction tank, and the telescopic link side of hydro-cylinder two is equipped with material mixing plate two, and one side of hydro-cylinder two is equipped with medicine mouth two and medicine mouth three, be equipped with the filter mantle that the filter screen formed in the clarification tank, in the play water piping connection clarification tank's of reaction tank filter mantle, the clarification tank top is equipped with the detection mouth, and clarification tank side below is equipped with delivery port three, heavy medium recovery system is connected with the filter mantle below to the reaction tank, heavy medium recovery system connects the sludge impoundment, the inside horizontally filter that is equipped with of sludge impoundment, the filter top is equipped with mud pressing device, and the sludge impoundment below is equipped with the wet return.
2. The heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device according to claim 1, characterized in that: the inner wall of the pretreatment tank is provided with an anticorrosive layer.
3. The heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device according to claim 1, characterized in that: the inclined angle of the inclined plane below the left side of the clapboard is 20-30 degrees.
4. The heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device according to claim 1, characterized in that: and control valves are arranged on the water inlet, the first water outlet, the second water outlet, the third water outlet and the water return pipe.
5. The heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device according to claim 1, characterized in that: one or two of the mixing plates are in a plum petal shape.
6. The heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device according to claim 1, characterized in that: the first mixing plate or the second mixing plate is arranged in an upper-lower double-layer mode.
7. The heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device according to claim 1, characterized in that: the dense medium recovery system is a magnetic drum device.
8. The heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device according to claim 1, characterized in that: the mud pressing device comprises a third oil cylinder on one side of the sludge tank, a telescopic rod of the third oil cylinder extends into the sludge tank, the telescopic rod of the third oil cylinder is connected with a push plate, and the lower edge of the push plate is attached to the filter plate.
9. The heavy-medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device according to claim 1, characterized in that: the water return pipe is communicated with the water inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120885870.7U CN215208965U (en) | 2021-04-27 | 2021-04-27 | Dense medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device |
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| CN202120885870.7U CN215208965U (en) | 2021-04-27 | 2021-04-27 | Dense medium magnetic coagulation high-efficiency integrated shale gas extraction water purification device |
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