CN212309847U - Preparation system of fracturing quartz sand - Google Patents
Preparation system of fracturing quartz sand Download PDFInfo
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- CN212309847U CN212309847U CN202020534355.XU CN202020534355U CN212309847U CN 212309847 U CN212309847 U CN 212309847U CN 202020534355 U CN202020534355 U CN 202020534355U CN 212309847 U CN212309847 U CN 212309847U
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Abstract
The utility model discloses a fracturing quartz sand preparation system, which comprises a raw sand discharging hopper, a roughing screening unit, a size mixing unit, a scrubbing unit, a wet screening unit, a dewatering screening unit, a drying unit, a fine screening unit and a storing unit; the raw sand discharging hopper is connected with a first water adding unit and is used for mixing dry raw sand with a certain amount of water and supplying the mixture to the roughing screening unit. The application provides a fracturing quartz sand preparation system, each part is rationally distributed, can realize that natural aeolian quartz sand edulcoration and screening obtain the large-scale continuous production of choice quartz sand. The whole system has small occupied area, simple installation and maintenance, high purity of the obtained quartz sand and good particle uniformity, and is worthy of large-area popularization and use.
Description
Technical Field
The utility model relates to a quartz sand preparation equipment technical field especially relates to a quartz sand preparation system suitable for natural aeolian sand production fracturing.
Background
In the field of petroleum, fracturing refers to a method of forming cracks in oil and gas layers by using the action of water power in the process of oil or gas production, and is also called hydraulic fracturing. Hydraulic fracturing refers to the pumping of fracturing fluid into a well at high pressures, resulting in high pressures at the bottom of the well, which when sufficient to fracture the formation, create a fracture in the formation and propagate forward to a space. In order to keep the fracture open, a proppant is placed in the fracture with the fracturing fluid after the formation has been fractured. After the proppant is delivered, the viscosity of the fracturing fluid is reduced and the fracturing fluid is refluxed, so that a crack with high diversion rate is generated.
At present, petroleum fracturing propping agents used at home and abroad are generally divided into three types: quartz sand, ceramsite proppant and coated proppant. In recent years, the price of oil and gas is continuously low, and cost reduction and efficiency improvement become the main melody of shale gas development. In North America, besides the speed increasing and the efficiency increasing of well drilling and completion, the using amount of the ceramsite is greatly reduced, the proportion of quartz sand in fracturing construction is increased, even the ceramsite is not used, the cost of fracturing materials is greatly reduced, and the shale gas benefit development under the low oil gas price is realized.
The natural aeolian sand is well-known good raw sand of the fracturing quartz sand, and the impurities contained in the natural aeolian sand need to be removed after the natural aeolian sand is mined, and different impurities need to be removed by different methods. Therefore, it is important to provide a system capable of realizing continuous production of natural aeolian sand.
SUMMERY OF THE UTILITY MODEL
The utility model provides a quartzy sand preparation system of fracturing.
The utility model provides a following scheme:
a preparation system of fractured quartz sand comprises a raw sand discharging hopper, a roughing screening unit, a size mixing unit, a scrubbing unit, a wet screening unit, a dewatering screening unit, a drying unit, a fine screening unit and a material storage unit;
the raw sand discharging hopper is connected with a first water adding unit and is used for mixing dry raw sand with a certain amount of water and supplying the mixture to the roughing screening unit;
the roughing screening unit is used for separating large-diameter impurities in the raw sand and supplying the separated first mortar to the size mixing unit;
the slurry mixing unit is connected with a second water adding unit and is used for mixing the first mortar so as to obtain second mortar with fluidity meeting the requirement of the first transmission pump;
the scrubbing unit is used for scrubbing the received second mortar supplied by the first transmission pump to obtain clean mortar;
the wet screening unit is used for performing wet screening on the clean mortar received and supplied by the scrubbing unit to obtain quartz sand with a target particle size;
the dewatering and screening unit is used for carrying out solid-liquid separation on the quartz sand with the target particle size;
the drying unit is used for drying the quartz sand subjected to solid-liquid separation;
and the fine screening and screening unit is used for carrying out granularity grading on the dried quartz sand and conveying the graded quartz sand to the storage unit.
Preferably: the raw sand discharging hopper is a quantitative discharging hopper, and the first water adding unit is used for adding water into the quantitative discharging hopper in an equal volume ratio mode.
Preferably: the roughing screening unit comprises a first linear screening machine, the first linear screening machine comprises three layers of screens arranged from top to bottom, the upper layer of screens is used for separating large-diameter impurities in raw sand, the middle layer of screens is used for obtaining the first mortar, and the lower layer of screens is used for obtaining small-diameter impurities.
Preferably: the scrubbing unit comprises a plurality of groups of scrubbing and desliming mechanisms so as to realize multi-stage scrubbing and desliming, and the scrubbing and desliming mechanisms comprise a scrubbing machine and a high-weir spiral classifier.
Preferably: the high weir type spiral classifier positioned at the tail end is connected with a third water adding unit and a second transmission pump, the second transmission pump is used for transmitting the clean mortar to a buffer tank, and the buffer tank is used for supplying the clean mortar to the wet screening unit.
Preferably: the wet screening unit comprises a second linear screening machine, and a plurality of water spraying pipes which are uniformly distributed are suspended above the screen surface of the second linear screening machine.
Preferably: the dewatering and screening unit comprises a linear vibrating screen.
Preferably: the drying unit includes a drum dryer.
Preferably: the wet screening unit and the dewatering screening unit are both connected with a wastewater recovery mechanism, and the wastewater recovery mechanism is connected with the first water adding unit.
Preferably: the storage unit is connected with an automatic weighing and packaging unit.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
through the utility model, a preparation system of the fracturing quartz sand can be realized, and in an implementation mode, the system can comprise a raw sand discharging hopper, a roughing screening unit, a size mixing unit, a scrubbing unit, a wet screening unit, a dewatering screening unit, a drying unit, a fine screening unit and a storage unit; the raw sand discharging hopper is connected with a first water adding unit and is used for mixing dry raw sand with a certain amount of water and supplying the mixture to the roughing screening unit; the roughing screening unit is used for separating large-diameter impurities in the raw sand and supplying the separated first mortar to the size mixing unit; the slurry mixing unit is connected with a second water adding unit and is used for mixing the first mortar so as to obtain second mortar with fluidity meeting the requirement of the first transmission pump; the scrubbing unit is used for scrubbing the received second mortar supplied by the first transmission pump to obtain clean mortar; the wet screening unit is used for performing wet screening on the clean mortar received and supplied by the scrubbing unit to obtain quartz sand with a target particle size; the dewatering and screening unit is used for carrying out solid-liquid separation on the quartz sand with the target particle size; the drying unit is used for drying the quartz sand subjected to solid-liquid separation; and the fine screening and screening unit is used for carrying out granularity grading on the dried quartz sand and conveying the graded quartz sand to the storage unit. The application provides a fracturing quartz sand preparation system, each part is rationally distributed, can realize that natural aeolian quartz sand edulcoration and screening obtain the large-scale continuous production of choice quartz sand. The whole system has small occupied area, simple installation and maintenance, high purity of the obtained quartz sand and good particle uniformity, and is worthy of large-area popularization and use.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a preparation system of fractured quartz sand provided by an embodiment of the present invention.
In the figure: the device comprises a raw sand discharging hopper 1, a roughing screening unit 2, a size mixing unit 3, a scrubbing unit 4, a scrubbing machine 41, a high weir type spiral classifier 42, a wet screening unit 5, a dewatering screening unit 6, a drying unit 7, a fine screening unit 8, a material storage unit 9, a first water adding unit 10, a second water adding unit 11, a first transmission pump 12, a third water adding unit 13, a second transmission pump 14, a buffer tank 15, a wastewater recycling mechanism 16 and an automatic weighing and packaging unit 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
Examples
Referring to fig. 1, in order to provide a preparation system for fractured quartz sand in an embodiment of the present invention, as shown in fig. 1, the system includes a raw sand discharging hopper 1, a roughing screening unit 2, a size mixing unit 3, a scrubbing unit 4, a wet screening unit 5, a dewatering screening unit 6, a drying unit 7, a fine screening unit 8, and a storing unit 9;
the raw sand discharging hopper 1 is connected with a first water adding unit 10, and the raw sand discharging hopper 1 is used for mixing dry raw sand with a certain amount of water and then supplying the mixture to the roughing screening unit 2; specifically, the raw sand discharging hopper 1 is a quantitative discharging hopper, and the first water adding unit 10 is used for adding water into the quantitative discharging hopper in an equal volume ratio manner.
The roughing screening unit 2 is used for separating large-diameter impurities in the raw sand and supplying the separated first mortar to the size mixing unit 3; specifically, roughing screening unit 2 includes first linear screening machine, first linear screening machine is including the three-layer screen cloth that from top to bottom sets up, and upper screen cloth is arranged in separating the former sand major diameter impurity, and the middle level screen cloth is used for obtaining first mortar, and lower floor's screen cloth is used for obtaining minor diameter impurity.
The slurry mixing unit 3 is connected with a second water adding unit 11, and the slurry mixing unit 3 is used for mixing the first mortar so as to obtain second mortar with fluidity meeting the requirement of the first transmission pump 12;
the scrubbing unit 4 is used for scrubbing the received second mortar supplied by the first conveying pump 12 to obtain clean mortar; the scrubbing unit 4 includes multiple sets of scrubbing and desliming mechanisms including a scrubber 41 and a high weir spiral classifier 42 to achieve multiple stages of scrubbing and desliming. Further, the high weir type spiral classifier at the extreme end is connected with a third water adding unit 13 and a second transfer pump 14, the second transfer pump 14 is used for transferring the clean mortar to a buffer tank 15, and the buffer tank 15 is used for supplying the clean mortar to the wet sieving unit 5. The application provides a clean the unit and can realize multistage cleaning, guarantee to get rid of the mud on quartz sand surface totally, this multilevel structure can realize the mode of arranging from top to bottom simultaneously, has area little, advantages such as work efficiency height.
The wet screening unit 5 is used for performing wet screening on the clean mortar received and supplied by the scrubbing unit 4 to obtain quartz sand with a target particle size; specifically, the wet screening unit 5 comprises a second linear screening machine, and a plurality of water spraying pipes which are uniformly distributed are suspended above the screening surface of the second linear screening machine.
The dewatering and screening unit 6 is used for carrying out solid-liquid separation on quartz sand with a target particle size; the dewatering and screening unit comprises a linear vibrating screen.
The drying unit 7 is used for drying the quartz sand subjected to solid-liquid separation; the drying unit includes a drum dryer.
The fine screening and screening unit 8 is used for carrying out particle size classification on the dried quartz sand and conveying the classified quartz sand to the storage unit 9.
Since the first water adding unit 10 has no special requirement on the cleanliness of water, in order to achieve the recycling of water and improve the water utilization rate, in the embodiment of the present application, the wet screening unit 5 and the dewatering screening unit 6 are both connected to a wastewater recovery mechanism 16, and the wastewater recovery mechanism 16 is connected to the first water adding unit 10. In order to realize automatic packaging, the storage unit 9 is connected with an automatic weighing and packaging unit 17.
When the system is used, the processing flow is as follows:
the process technical route is the process route of raw sand → rough concentration → size mixing → scrubbing → desliming → wet screening → dehydration screening → yard airing → drying → screening → packaging → warehousing:
(1) raw sand: the method comprises the following steps that (1) raw sand is mined in a raw sand ore through a loader and then is transported to a factory through a dump truck;
(2) roughing: raw sand is fed by a raw sand feeding hopper and simultaneously added with water in equal proportion, and then enters a linear sieving machine for coarse sieving, wherein the sieving machine is divided into an upper layer, a middle layer and a lower layer, the upper layer is used for separating impurities such as leaves, grass, trees, stones and the like doped in the raw sand, the middle layer is used for preparing required mortar, and the lower layer is used for preparing finer slurry.
(3) Size mixing: after coarse screening, the mortar in the middle layer of the screening machine enters a mortar mixing hopper, and a certain proportion of water is added for mixing.
(4) Scrubbing: conveying the mixed mortar to a scrubbing unit through a sand pump for scrubbing, scrubbing once, then desliming, and then performing 7 times of continuous scrubbing to fully separate clay, impurities and the like adhered to the surface of sand grains;
(5) desliming: the desliming adopts a high weir type spiral classifier, by means of the principle that sand grains and sludge grains have different sizes and specific gravity, so that the sedimentation speeds in liquid are different, the sludge grains are discharged from the top of a classification area through an overflow groove under the action of ascending water flow due to low sedimentation speed, the sedimentation speed of the sand grains is greater than the ascending speed of the liquid flow, the sand grains are settled at the bottom of a tank and are pushed to a sand return end by a spiral for discharge.
(6) Wet screening: scrubbing the grit after desliming and then adding new water of certain proportion and carry to the buffer tank through the sand pump, then get into the wet screening unit of straight line from the buffer tank and carry out the screening of one-level, the screen surface of each linear screening machine all is equipped with evenly distributed's spray pipe and washes the sand on the screen surface, separates out different particle diameters through the wet screening of different levels, carries to the yard and dries in the air the water.
(7) Dewatering and screening: the wet sand is carried and is dewatered and sieved after to the dewatering screen, and the dewatering screen extension is linear vibrating screen, can fully make the material stand thin in the sifter, makes the material realize abundant dehydration on the sifter, finally reduces the moisture content of wet sand, and the moisture of desorption flows back to sewage treatment system through the back flow under the vibrating screen.
(8) Airing water in a storage yard: the dehydrated wet sand can enter a storage yard for natural airing and can also directly enter drying equipment for drying.
(9) Drying: the wet sand after the water is dried in the yard is dried by a roller dryer, the movement process of the quartz sand in the roller is divided into two stages of lifting and scattering, in the lifting stage, a lifting plate rotates along with the roller to drive the quartz sand to do circular motion, when the corner increasing position is increased, the quartz sand on the surface layer continuously slides off, the sliding quartz sand enters the scattering stage, in the scattering stage, the quartz sand and gas exchange heat, the moisture continuously dissipates, and the quartz sand falls into the bottom of the roller until the quartz sand falls into the bottom of the roller and is moved by the lifting plate again to enter the next lifting stage. The sand production temperature is controlled to be 75-100 ℃, and the water content is controlled to be below 0.2%.
(10) Screening: and screening out impurities doped in the quartz sand through an impurity screen, and then grading the granularity through a linear vibration screening machine.
(11) Packaging: and lifting the screened quartz sand to a storage tank by a lifter, and then weighing and packaging by an automatic weighing and packaging machine.
(12) Energy conservation and environmental protection: the sewage in the scrubbing process is subjected to centralized recovery treatment, so that the sewage is recycled; and desulfurization, denitration and dust removal equipment is adopted to treat the flue gas and the dust in the drying process.
In a word, the fracturing quartz sand preparation system that this application provided, each part is rationally distributed, can realize that natural aeolian quartz sand edulcoration and screening obtain the large-scale continuous production of choice quartz sand. The whole system has small occupied area, simple installation and maintenance, high purity of the obtained quartz sand and good particle uniformity, and is worthy of large-area popularization and use.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A preparation system of fractured quartz sand is characterized by comprising a raw sand discharging hopper, a roughing screening unit, a size mixing unit, a scrubbing unit, a wet screening unit, a dewatering screening unit, a drying unit, a fine screening unit and a material storing unit;
the raw sand discharging hopper is connected with a first water adding unit and is used for mixing dry raw sand with a certain amount of water and supplying the mixture to the roughing screening unit;
the roughing screening unit is used for separating large-diameter impurities in the raw sand and supplying the separated first mortar to the size mixing unit;
the slurry mixing unit is connected with a second water adding unit and is used for mixing the first mortar so as to obtain second mortar with fluidity meeting the requirement of the first transmission pump;
the scrubbing unit is used for scrubbing the received second mortar supplied by the first transmission pump to obtain clean mortar;
the wet screening unit is used for performing wet screening on the clean mortar received and supplied by the scrubbing unit to obtain quartz sand with a target particle size;
the dewatering and screening unit is used for carrying out solid-liquid separation on the quartz sand with the target particle size;
the drying unit is used for drying the quartz sand subjected to solid-liquid separation;
and the fine screening and screening unit is used for carrying out granularity grading on the dried quartz sand and conveying the graded quartz sand to the storage unit.
2. The system for preparing fractured quartz sand according to claim 1, wherein the raw sand discharging hopper is a quantitative discharging hopper, and the first water adding unit is used for adding water into the quantitative discharging hopper in an equal volume ratio.
3. The fracturing quartz sand preparation system of claim 1, wherein the roughing screening unit comprises a first linear screening machine, the first linear screening machine comprises three layers of screens arranged from top to bottom, the upper layer of screens is used for separating large-diameter impurities from raw sand, the middle layer of screens is used for obtaining the first mortar, and the lower layer of screens is used for obtaining small-diameter impurities.
4. The system for preparing fractured quartz sand according to claim 1, wherein the scouring unit comprises a plurality of sets of scouring and desliming mechanisms so as to realize multi-stage scouring and desliming, and the scouring and desliming mechanisms comprise a scouring machine and a high weir spiral classifier.
5. The system for preparing fractured quartz sand according to claim 4, wherein the high weir type spiral classifier at the extreme end is connected with a third water adding unit and a second transfer pump, the second transfer pump is used for transferring the clean mortar to a buffer tank, and the buffer tank is used for supplying the clean mortar to the wet sieving unit.
6. The system of claim 1, wherein the wet sieving unit comprises a second linear sieving machine having a plurality of uniformly distributed water jets suspended above a sieving surface of the second linear sieving machine.
7. The frac quartz sand production system of claim 1, wherein said dewatering screening unit comprises a linear vibrating screen.
8. The system for preparing fractured quartz sand according to claim 1, wherein the drying unit comprises a drum dryer.
9. The system for preparing fractured quartz sand according to claim 1, wherein the wet screening unit and the dewatering screening unit are both connected with a wastewater recovery mechanism, and the wastewater recovery mechanism is connected with the first water adding unit.
10. The system for preparing fractured quartz sand according to claim 1, wherein an automatic weighing and packaging unit is connected to the storage unit.
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| CN202020534355.XU CN212309847U (en) | 2020-04-13 | 2020-04-13 | Preparation system of fracturing quartz sand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116083071A (en) * | 2023-01-19 | 2023-05-09 | 千石环保科技(宜昌)有限公司 | Quartz fracturing sand production process and quartz fracturing sand production system |
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2020
- 2020-04-13 CN CN202020534355.XU patent/CN212309847U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116083071A (en) * | 2023-01-19 | 2023-05-09 | 千石环保科技(宜昌)有限公司 | Quartz fracturing sand production process and quartz fracturing sand production system |
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