CN212092746U

CN212092746U - Oil fracturing propping agent production line

Info

Publication number: CN212092746U
Application number: CN202020708683.7U
Authority: CN
Inventors: 李继余; 刘建华; 王海会
Original assignee: Tongliao Silica Sand In Building Materials Industry Co ltd
Current assignee: Tongliao Silica Sand In Building Materials Industry Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-12-08
Anticipated expiration: 2030-04-30

Abstract

The utility model relates to a solid separation equipment of wet process solid and method technical field, concretely relates to oil fracturing propping agent production line. The production line comprises a feeding system, a pretreatment system, a primary sorting system and a secondary sorting system, wherein the feeding system is used for continuously supplying mortar raw materials to the sorting device from a mortar source, the pretreatment system is used for carrying out operations including but not limited to dehydration, concentration, impurity removal, wiping and lifting on the mortar raw materials supplied by the feeding system, the primary sorting system is used for carrying out coarse product sorting on the mortar treated by the pretreatment system, and the secondary sorting system is used for carrying out fine product sorting on the mortar sorted by the primary sorting system; the beneficial effects are as follows: according to different requirements, the water flow direction is improved, independent cyclone separation or sedimentation separation is realized, and a separation mode combining cyclone separation and sedimentation separation can also be realized; one machine has multiple functions and is simple to operate.

Description

Oil fracturing propping agent production line

Technical Field

The utility model relates to a solid separation equipment of wet process solid and method technical field, concretely relates to oil fracturing propping agent production line.

Background

Silica sand (quartz sand) has found widespread use in the glass, foundry and other industrial sectors in recent years, but it is generally classified or deslimed prior to use. Quartz sand is an important industrial mineral raw material and is widely applied to the industrial fields of glass, casting, metallurgy, chemical industry, grinding materials and the like. Most of the quartz sand is produced by crushing quartz rock ores and grading, and a sand source can be directly mined in areas with abundant natural sand resources. The production process of the quartz sand comprises a wet production process and a dry production process. The quartz sand used as the glass raw material is mainly produced by a wet process. The wet process production has the following advantages: the production rate is high; the material grading and conveying are convenient; preventing the flying of dust in the production process, environmental pollution and harm to human body. Under the conditions of continuous enlargement of the production scale of quartz sand and great improvement of yield, the requirement on quality is stricter, and the particle size classification in the production process is a key process. The classification method and the classification machine have great influence on the investment cost, the product quality, the operation cost and the like of the quartz sand production device. Therefore, the deep research on the grading mechanical equipment in the quartz sand production has very important practical significance for improving the product quality and reducing the production cost. Silica sand for glass needs to be removed with +0.8 mm coarse particles and-0. l milli-fine fraction; before the foundry sand is sold to users, various specifications such as 45/75 meshes, 55/100 meshes, 75/150 meshes, 100/200 meshes and the like need to be sorted in a concentrating mill, and the granularity concentration rate (precision) of each grade of silica sand is required to be more than 75-80%. Therefore, the quality of the silica sand grading effect directly influences the product quality.

Currently, there are two main domestic silica sand classification methods: one is classification by using a sieve (flat shaking sieve, high square sieve, drum sieve, vibrating sieve, etc.), and the other is classification by using hydraulic power (including desliming). When the silica sand with the granularity of 0.1-1 mm (particularly thinner) is screened and sorted, the screen is easy to block, the grading efficiency is not high, and the screen is seriously abraded. In China, a lot of silica sand sorting plants adopt hydraulic classification, and a desliming bucket or a conical (or cylindrical) hydraulic classifier with ascending water flow improved by the desliming bucket is mainly used for desliming or classification. The hydraulic classification equipment has no moving parts, can not be abraded, and can meet the requirements of various industrial departments (especially glass industry) on the granularity of silica sand to a certain extent; however, for the departments with strict requirements on the granularity (such as precision casting), the quality is sometimes difficult to ensure, and the spiral classifier and the hydrocyclone are only adopted by individual silica sand concentrating mills. The granularity of the spiral grading overflow is not easy to control, and rotating parts are easy to wear; hydrocyclones are sensitive to operating conditions such as water pressure and feed.

Most of the foundry sand production enterprises in China adopt a series of conical hydraulic classifiers (including a cylindrical hydraulic classifier with a smaller lower cone and a cylinder with a certain height at the upper part) to carry out continuous desliming-grading operation on natural silica sand through a washing tower. Although the classifier has simple structure, low manufacturing cost and convenient operation, when the classifier is used for classifying coarse particles (0.3-1 mm), due to the limitation of the structure, the classification effect is poor, the coarse and fine mixed in classified products is serious, the particle size concentration rate is low, and unqualified products are easy to appear.

In foreign countries, silica sand classification also mainly adopts screening and hydraulic classification. The natural sand desliming generally takes a cyclone as a main part, and when the raw sand contains few impurities, the main operation of mineral separation is classification. In order to improve the grading effect and improve the grading efficiency, many foreign companies pay attention to research and develop high-efficiency grading equipment, such as arc screens, jet classifiers, siphon classifiers and various ascending water flow classifiers. Among them, the ones with better grading effect are automatic interference settlement grader, Rheax type grader, etc. The Rhemax fractionation method is widely used in Australian, Fin, Sweden, Olympic, Germany, Japan, etc., because of its high fractionation accuracy.

Technical problem 1: silica sand is widely applied, the requirements on the granularity (mesh number and particle size) of the sand are different in different application occasions, the requirement on the granularity concentration rate of each mark of silica sand is different, and particularly in the process of large-scale mass production, the requirement on the quantity is possibly greater than the requirement on the precision. Therefore, how to realize adopting one set of equipment (production line) to select separately the production requirement of multiple specification, multiple particle diameter precision is the utility model discloses the main technical problem who solves. Of course, the above-mentioned equipment is not necessarily required to meet both the requirements of specification and precision, and it is also possible to achieve the above-mentioned requirements by designing and improving the process method.

Technical problem 2: in the process of separating sand by a hydraulic classification method, firstly, the sand in a water production line is divided into 3 types, namely a floating layer, a suspended layer and a sinking layer, which occupy an upper layer, a middle layer and a lower layer in a separation container. In actual production, hydraulic classification is carried out in a hindered settling tank, and due to the characteristics of hydraulic classification, the requirements on classification precision and productivity are met, high dispersion degree among particle sizes is required, and the section size of certain equipment is ensured. From theoretical analysis, under the condition of a certain water flow velocity, the circulating water quantity is in direct proportion to the square of the diameter of the equipment, the larger the treatment capacity of the equipment is, the higher the grading precision is, the larger the section size of the required equipment is, and the larger the circulating water quantity and the power consumption corresponding to the section size are. Therefore, the diameter of the hindered settling tank is designed to be reduced as much as possible, the problem of dispersion among particle sizes and productivity is solved by increasing the height of equipment, and the height of the hindered settling tank is more than 3m generally. Due to the structural characteristics of the hindered settling tank, the equipment investment cost is high and the building capital cost of a factory is high compared with screening and grading under the condition of the same grading treatment capacity.

The hydraulic classification has the advantages that: the hydraulic classification is to separate particles with different particle sizes through the buoyancy of water flow, compared with a screening method, the hydraulic classification has no screen in equipment, the screen does not need to be replaced, the maintenance cost of the equipment is reduced, the labor intensity of workers and the auxiliary time of production are reduced, and meanwhile, the continuity and the stability of production are ensured. The disadvantages are that: the hydraulic classification is to separate particles with different particle sizes according to the characteristics of water flow, so that the density, shape and sedimentation conditions of the particles have influence on the sedimentation velocity, and the cross-sectional size of equipment is limited by factors such as power consumption in design, so that the particle group mixing phenomenon is serious during classification, and the problems of high power consumption, low separation precision, low unit volume processing capacity and the like exist. In addition, the hydraulic classification operation control is strict, and the control process is easy to fluctuate. When all the control factors change in the production process, the classification is easy to fail.

Therefore, as can be seen from the above description, the state of the dispersion formed between water and sand in the production line has a significant influence on the classification effect, i.e., a uniform and stable dispersion can output sand with a single particle size (a certain mesh range) to a certain extent, and the precision of the classification product (the proportion of sand with a specified particle size in sand of a certain specification) is also high. However, in the currently known sorting device, the mortar feeding pipe and the water feeding pipe in the single classifier (referring to the barrel body of a single sorting device) have no matching relationship, so that the fed mortar continuously destroys the dispersion system balance established and maintained in the barrel body, and the classification effect is influenced.

The petroleum fracturing sand belongs to a fracturing propping agent, has high fracturing strength, and is mainly used for underground support of an oil field so as to increase the yield of petroleum and natural gas. The fracturing propping agent is prepared by sintering various raw materials such as high-quality bauxite and the like by using ceramics, is a substitute of medium and low strength propping agents such as natural quartz sand, glass balls, metal balls and the like, and has good effect on increasing the yield of petroleum and natural gas. When the petroleum and natural gas deep well is exploited, the high-closure-pressure low-permeability deposit is fractured to crack the oil-gas-containing rock stratum, and the oil gas is collected from a channel formed by the fracture. The ceramsite supporting material enters the stratum along with the high-pressure solution and is filled in the cracks of the rock stratum, and the effect of supporting the cracks not to be closed due to stress release is achieved, so that the high flow conductivity is kept, oil and gas are smooth, and the yield is increased. Practice proves that the oil well fractured by the ceramsite proppant can improve the yield by 30-50% and can prolong the service life of the oil and gas well.

The fracturing propping agent can be widely used for the fracturing reformation of deep wells and high-pressure oil-gas layers. Classification of fracturing proppant products:

1. according to the crushing resistance degree, respectively: four series of 52MPa (7500 psi), 69MPa (10000 psi) and 86MPa (12500 psi), 102MPa (15000 psi);

2. the volume density is divided into: low, medium, high density;

3. according to the specification, the method comprises the following steps: 12-20 meshes, 16-30 meshes, 20-40 meshes, 30-50 meshes, 40-60 meshes, 40-70 meshes, 70-100 meshes and the like. In order to meet the requirements of oil and gas wells at home and abroad, users can select products with different strengths and specifications according to the depth of the oil well. Of course, the product classification is based on standard fracturing propping agents, and indexes such as classification specification and crushing strength are different when natural silica sand is used as the fracturing propping agent.

Silica sand resources in northern China are abundant, and the silica sand can be widely used for hydraulic classification operation, wherein the sand collecting device is generally a sand collecting ship, a sand collecting pump and the like, and for example, documents such as a multi-purpose sand collecting ship in the Chinese patent CN106492975B, a double-side sand collecting ship in the CN203753299U, a CN203583545U, a water flushing sand collecting ship and the like all disclose the sand collecting device and/or the sand collecting method.

Disclosure of Invention

The purpose of the utility model is mainly that: a set of hydraulic classification device is provided, namely a production line for performing hydraulic classification on silica sand with various specifications by adopting the set of hydraulic classification device.

Another object of the present invention is mainly: provides a set of production process and method for hydraulic classification by adopting the hydraulic classification device.

The above purpose is realized by the following technical scheme:

a production line of petroleum fracturing propping agent is characterized in that:

the production line comprises a feeding system, a pretreatment system, a primary sorting system and a secondary sorting system, wherein the feeding system is used for continuously supplying mortar raw materials from a mortar source to the production line, the pretreatment system is used for carrying out operations including but not limited to dehydration, concentration, impurity removal, wiping and lifting on the mortar raw materials supplied by the feeding system, the primary sorting system is used for carrying out coarse product sorting on the mortar treated by the pretreatment system, and the secondary sorting system is used for carrying out fine product sorting on the mortar sorted by the primary sorting system;

the feeding system comprises a sand extraction ship, the sand extraction ship is provided with a conveying pipeline, the conveying pipeline is connected with the pretreatment system, and mortar collected by the sand extraction ship is supplied to the pretreatment system through the conveying pipeline;

the pretreatment system comprises a first cyclone, a first impurity sieve, a zero classifier, a first scrubbing machine, a first hoister, a second cyclone and a second impurity sieve;

the first cyclone is used for dehydrating and concentrating the mortar;

the first impurity screen is used for removing impurities except water, sand and mud in the mortar;

the zero classifier is used for concentrating, dehydrating and desliming the mortar;

the first scrubbing machine is used for scrubbing mortar;

the first lifting machine is used for lifting the mortar to a high place;

the second cyclone is used for dehydrating and concentrating the mortar;

the second impurity screen is used for removing impurities except water and sand in the mortar;

the primary sorting system comprises four primary classifiers which are respectively a primary classifier, a secondary classifier, a tertiary classifier and a quartering classifier;

the primary sorting system comprises two primary finished product pools, namely a first finished product pool and a second finished product pool;

the primary classifier is in a barrel shape and is provided with a sand supply pipe, a water inlet pipe, an overflow trough and a discharge port; the water inlet pipe is arranged at the bottom of the primary classifier and is used for supplying water to the primary classifier; the sand supply pipe is arranged above the primary classifier and extends into the primary classifier to supply mortar to the primary classifier; the overflow groove is arranged on the outer side of the upper edge of the barrel wall of the primary classifier and is used for receiving the materials overflowed from the upper edge of the primary classifier; the discharge port is arranged at the bottom of the primary classifier;

the discharge port of the first sub-machine is connected with the sand supply pipe of the second sub-machine, and the overflow trough of the first sub-machine is connected with the sand supply pipe of the third sub-machine;

the discharge port of the second branch machine is connected with the first finished product pool, and the overflow groove of the second branch machine is connected with the second finished product pool;

the discharge ports of the three-branch machine are connected with the sand supply pipes of the four-branch machine, and overflow chutes of the three-branch machine are connected to a secondary sorting system through pipelines;

the discharge ports of the four sub-machines are connected with the second finished product pool, and overflow chutes of the four sub-machines are connected to the secondary sorting system through pipelines;

the secondary sorting system comprises two secondary classifiers which are respectively a five-branch classifier and a six-branch classifier;

the secondary sorting system comprises two secondary finished product pools, namely a third finished product pool and a fourth finished product pool;

the secondary classifier adopts the same structure as the primary classifier;

the overflow chutes of the three-branch machine and the four-branch machine are connected with the sand supply pipes of the five-branch machine through pipeline confluence;

the discharge ports of the five-branch machine are connected with the sand supply pipes of the six-branch machine, and overflow chutes of the five-branch machine are emptied through pipelines extending outwards;

the discharge port of the six-branch machine is connected with the third finished product pool, and the overflow groove of the six-branch machine is connected with the fourth finished product pool.

The sand extraction ship, the first cyclone, the first impurity sieve, the zero classifier, the first scrubbing machine, the first hoister, the second cyclone, the second impurity sieve and the sorter are sequentially connected;

and a water pump is arranged between the sand extraction ship and the first cyclone, and is used for pumping mortar to the first cyclone by the sand extraction ship.

The first cyclone, the first impurity screen, the zero classifier and the first scrubbing machine convey mortar from top to bottom through gravity;

the second impurity sieve is connected with a sand supply pipe of the separator;

the second cyclone, the second impurity screen, the first separator, the second separator, the third separator and the fourth separator convey mortar from top to bottom through gravity;

the mortar is conveyed from top to bottom among the three-branch machine, the four-man machine and the five-branch machine and among the five-branch machine and the six-branch machine through gravity;

the water inlet pipes of the primary classifier and the secondary classifier are respectively connected with an external water source.

A secondary treatment system is arranged between the primary sorting system and the secondary sorting system;

the secondary treatment system comprises a concentration tank, a stabilized ore classifier, a second scrubbing machine, a second hoister and a third swirler;

the concentration tank is funnel-shaped, overflow groove confluence mortar output pipelines of a third sub-machine and a fourth sub-machine in the primary separation system are connected above the concentration tank, and a stabilized ore classifier is connected below the concentration tank;

the stabilized ore classifier adopts the same structure as the primary classifier, the overflow groove of the stabilized ore classifier is emptied outwards through a pipeline, and the discharge port is connected with a second scrubbing machine;

the second scrubbing machine has the same structure as the first scrubbing machine, the size specification of the second scrubbing machine is smaller than that of the first scrubbing machine, and the outlet of the second scrubbing machine is connected with a second hoisting machine;

the second hoister adopts the same structure as the first hoister, lifts the mortar to a high place and is connected into the third swirler;

the third cyclone adopts the same structure as the second cyclone, and the outlet of the third cyclone is connected with five sand supply pipes.

The primary classifier is provided with a conical part which is arranged at the bottom of the barrel in an inverted mode, the upper edge of the conical part is connected with the side wall of the primary classifier barrel, the tip of the lower part of the conical part abuts against the middle position of the bottom surface of the primary classifier barrel, and the discharge port of the bottom surface of the primary classifier barrel is communicated with the bottom of the conical part.

The zero classifier adopts the same structure as the primary classifier;

the zero classifier is provided with a sand feeding pipe, a water inlet pipe, an overflow groove and a discharge port, the sand feeding pipe of the zero classifier is connected with the first impurity sieve, the water inlet pipe of the zero classifier is connected with an external water source, the overflow groove of the zero classifier is emptied through a pipeline extending outwards, and the discharge port of the zero classifier is connected with the first scrubbing machine.

The primary sorting system is provided with two sets of parallel primary classifiers, and the primary classifier, the secondary classifier, the tertiary classifier and the quartering classifier are respectively provided with two sets;

a first distributor is arranged between the two first extension machines and the second impurity sieve, the first distributor has a three-way structure, a mixing cavity is arranged at the intersection of the three-way structure, and the mixing cavity is used for uniformly mixing mortar entering the two first extension machines from the first impurity sieve;

the discharge ports of the two secondary separating machines share the first finished product pool, the overflow ports share the second finished product pool, and the discharge ports of the two four separating machines share the second finished product pool.

The secondary sorting system is provided with two sets of parallel secondary classifiers, and the five-branch classifier and the six-branch classifier are respectively provided with two sets of parallel secondary classifiers;

a second distributor is arranged between the two five-branch machines and the second hoisting machine, the second distributor has a three-way structure, a mixing cavity is arranged at the intersection of the three-way structure, and the mixing cavity is used for uniformly mixing mortar entering the two five-branch machines from the second hoisting machine;

the discharge ports of the two six sub-machines share a third finished product pool, and the overflow ports share a fourth finished product pool.

The primary classifier is in a cylindrical shape, an inverted conical shell is arranged at the bottom of the cylindrical barrel, a plurality of water inlet holes are annularly distributed on the side surface of the conical shell, the water inlet holes are annularly distributed in multiple layers, the upper edge of the conical shell is welded with the inner side surface of the cylindrical barrel, the lower edge of the conical shell is welded with the bottom surface of the cylindrical barrel, the cylindrical barrel is divided into an upper cavity and a lower cavity by the conical shell, the upper cavity is a sedimentation space, the lower cavity is a water inlet space, and a water inlet pipe is arranged on the side wall of one side of the water inlet space; a discharge port is arranged below the conical shell; the discharge port is communicated with the bottom surface of the barrel, and a valve is arranged in the discharge port; the outer side above the drum is provided with an overflow groove, the bottom surface of the overflow groove is an inclined plane, the lowest part of the bottom surface is provided with an overflow port, and the upper edge of the overflow groove is higher than that of the drum; a plurality of sand supply pipes are arranged on the side surface of the round barrel below the bottom surface of the overflow groove.

The water spraying device comprises a water inlet screw hole, a hollow spherical shell, a bolt, a spherical support, a spherical cover and a water guide pipe, wherein the water guide pipe is integrated with the spherical cover, the water guide pipe is a bent pipe, the water inlet screw hole is integrated with the hollow spherical shell, the spherical support is connected with the spherical cover through the bolt and is connected with the hollow spherical shell in a spherical hinge manner, the water guide pipe can rotate around the axis of the water inlet screw hole and can swing around the axis of the water inlet screw hole, and the water spraying device is screwed on the water inlet hole through external threads of the water inlet screw hole.

The water spraying device is characterized in that a support arm is welded on a water guide pipe of the water spraying device and is connected with a connecting rod through a ball hinge, a sliding sleeve is welded at the lower end of the connecting rod and is sleeved on a linkage ring, and stop blocks are arranged on two sides of the sliding sleeve and fixedly connected with the linkage ring.

The utility model discloses a taper shell, including conical shell, guide groove, linkage ring, fixing device, guide groove, slider, link ring, the medial surface of conical shell evenly arrange on same horizontal plane and be no less than three guide groove, evenly arrange on same horizontal plane and be no less than three guide groove and have two-layerly at least, be equipped with the slider in the guide groove, slider one end is in for supporting the cover, the linkage ring passes and supports the cover, links firmly by three pole settings between the linkage ring, forms the back taper frame, at the.

In application, the water guide pipe is tangent to the inner side surface of the conical shell and deflects upwards, and water in the water inlet space passes through the water inlet hole under the action of pressure provided by the water inlet pump, and is sprayed to the sedimentation space along the inner side surface of the conical shell obliquely upwards to form water flow which is upward in rotation.

A production process of a petroleum fracturing propping agent is characterized by comprising the following steps:

(1) the method comprises the following steps that mortar is pumped out by a mortar pump of a sand dredger and conveyed to a pretreatment system through a pipeline, desliming concentration is carried out through a first swirler, a first impurity screen is supplied for impurity removal after concentration, the material after impurity removal is supplied to a zero classifier for concentration and then supplied to a first scrubber for scrubbing, the scrubbed material is discharged to a desliming mortar pool for desliming lifting, the material is lifted to a second swirler for desliming concentration through a first lifter, and classification is waited;

(2) the mortar obtained in the last step enters a primary separation system, is supplied to a first-order separator with 40/70 meshes for primary separation, the ore discharged by the first-order separator enters a second-order separator with 40/70 meshes for secondary separation, the ore discharged by the second-order separator is a finished product with 40/70 meshes, and the overflow enters a finished product with 50/100 meshes;

the overflow of the separator enters a three-branch separator with 50/100 meshes for primary separation, the ore discharge of the three-branch separator enters a four-branch separator with 50/100 meshes for fine separation, the ore discharge of the four-branch separator is 50/100 meshes of finished products, and the overflow confluence of the three-branch separator and the four-branch separator enters a secondary separation system after being reprocessed by a secondary treatment system;

(3) conveying the mortar entering the secondary separation system from the primary separation system to a stabilized ore classifier of the secondary treatment system for concentration and dehydration, scrubbing, desliming and lifting by a second scrubbing machine, and then performing secondary separation;

(4) the mortar treated by the secondary treatment system enters a five-branch machine with 70/140 meshes, ore discharge of the five-branch machine enters a six-branch machine with 70/140 meshes for ore dressing, the ore discharge of the six-branch machine is a finished product with 70/140 meshes, and the overflow is a finished product with 100/200 meshes.

The beneficial effects are as follows:

according to different requirements, the water flow direction is improved, independent cyclone separation or sedimentation separation is realized, and a separation mode combining cyclone separation and sedimentation separation can also be realized; one machine has multiple functions and is simple to operate.

Drawings

FIG. 1 is a schematic diagram of the overall structure and layout of a production line in an embodiment of the present invention, which is shown in a vertical view, and some structures and connections are hidden by overlapping or not specifically shown;

FIG. 2 is a schematic flow chart of a production line and a sorting process in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a primary classifier according to an embodiment of the present invention, in which: 5 is the position of the sand supply pipe and the material flow direction, 301 is the position of the water inlet pipe and the material flow direction, 401 is the position of the overflow port (and the matched pipeline) and the material flow direction, and 302 is the position of the discharge port and the material flow direction;

FIG. 4 is a perspective sectional view of a primary classifier according to a third embodiment of the present invention;

FIG. 5 is a schematic perspective view of a primary classifier of a third embodiment of the present invention with a water spraying device;

FIG. 6 is a sectional view of a water spraying device additionally installed on the primary classifier in the third embodiment of the present invention;

fig. 7 is a schematic structural view of a water spraying device in a third embodiment of the present invention;

fig. 8 is a state diagram of the water spraying device when the link ring rotates according to the third embodiment of the present invention;

fig. 9 is a state diagram of the water spraying device when the link ring moves up and down in the third embodiment of the present invention;

fig. 10 is a schematic structural view of a guide groove in the third embodiment of the present invention;

fig. 11 is a schematic connection diagram of the guiding groove, the link ring and the water spraying device in the third embodiment of the present invention;

fig. 12 is a schematic view of the linkage operation of all the water spraying devices in the third embodiment of the present invention.

As can be seen from the figure: 1 conical shell, 101 water inlet holes, 2 sedimentation spaces, 3 water inlet spaces, 301 water inlet pipes, 302 discharge ports, 4 overflow grooves, 401 overflow ports, 5 sand supply pipes, 6 water spray devices, 601 water inlet screw holes, 602 hollow spherical shells, 603 bolts, 604 spherical supports, 605 spherical masks, 606 water guide pipes, 607 support arms, 608 spherical hinges, 609 connecting rods, 610 sliding sleeves, 7 linkage rings, 701 stoppers, 8 guide grooves, 9 sliding blocks, 901 support sleeves, 10 upright posts, 11 operating levers and 12 fixing devices.

Detailed Description

The utility model relates to a wet-type separator and method uses this fluid material of water to select separately the silica sand, and its principle adopts non-centrifugal force, or the leading factor is not centrifugal force sink-float separation technique, through multistage hydraulic classification production line and production technology, the one set of production line of accessible once only sieves the silica sand of different specifications fast, has improved silica sand hydraulic classification's screening efficiency by a wide margin. The one-time operation in the primary rapid screening means a production line type production mode through the production line, that is, the mortar raw material is continuously supplied by the feeding system, and various processing devices and devices in the pretreatment system also perform operations such as filtering, concentrating, dehydrating, scrubbing, lifting and the like on the mortar in a flowing manner, so that the mortar mainly composed of water sand is continuously supplied to the primary sorting system and the secondary sorting system. The primary and secondary sorting system includes several classifiers, such as one, two and five classifiers, which are arranged from top to bottom and communicated via pipelines with different functions, and the mortar may flow via gravity to form one linkage system. The following mainly takes four specifications of silica sand with meshes of 40/70, 50/100, 70/140 and 100/200 produced by the applicant as an example to illustrate the specific structure, connection relationship, use method, process conditions and the like of the production line of the application.

The application relates to the working principle of the technical scheme of the production line and the production process:

as shown in fig. 1, raw sand (mortar) is pumped out by a slurry pump of a sand dredger, and is conveyed to a swirler (a first swirler) of a washing workshop (a pretreatment system) through a pipeline for desliming and concentration, the concentrated raw sand is supplied to an impurity screen (the first impurity screen) for impurity removal, the material subjected to impurity removal is supplied to a raw ore classifier (namely a zero classifier) for concentration, and then is supplied to a scrubber (the first scrubber) for scrubbing, the scrubbed material is discharged to a desliming mortar pool for desliming and lifting, and a lifter (the first lifter) lifts the material to the swirler (a second swirler) for desliming and concentration, so that mortar to be classified is obtained.

The mortar to be classified enters a primary sorting system and is supplied to a primary sorting classifier (a primary classifier) of 40/70 meshes for primary sorting. The ore discharged by the primary sorting grader of 40/70 meshes enters a fine sorting grader (secondary sorting machine) of 40/70 meshes for secondary ore dressing, the ore discharged by the fine sorting grader of 40/70 meshes is a finished product of 40/70 meshes, and the finished product overflows into a finished product pulp pool of 50/100 meshes.

The overflow of the 40/70-mesh primary separation classifier enters a 50/100-mesh primary separation classifier (a three-branch machine) for primary separation, the ore discharge of the 50/100-mesh primary separation classifier enters a 50/100-mesh fine separation classifier (a four-branch machine) for fine separation, the ore discharge of the 50/100-mesh fine separation classifier is 50/100-mesh finished products, and the overflow combined flow of the 50/100-mesh primary separation classifier and the fine separation classifier enters a secondary separation system after being reprocessed.

The mortar entering the secondary sorting system from the primary sorting system is obtained by overflowing the primary sorting system, the secondary sorting system and the quartering machine, so that the proportion of silica sand in water in the mortar is small, the secondary sorting system is not beneficial to screening, the mortar contains more fine sand of 70-200 meshes, the sand grains are fine, and the secondary sorting is beneficial to the secondary sorting after the secondary sorting is needed to be processed again.

Therefore, the mortar sand entering the secondary separation system is fine, and needs to be conveyed to a fine ore classifier for concentration and dehydration, and then scrubbed, deslimed and lifted to perform secondary separation. The retreated mortar enters an 70/140-mesh primary classifier (five-stage classifier), ore discharge of the 70/140-mesh primary classifier enters a 70/140-mesh fine selection classifier (six-stage classifier) for mineral separation, the ore discharge of the 70/140-mesh fine selection classifier is 70/140-mesh finished products, and overflow of the 70/140-mesh fine selection classifier is 100/200-mesh finished products. And the ore discharge of all the classifiers is controlled by automatic discharging. And lifting the finished product to a finished product swirler through a pipeline for concentration and stacking.

[ example 1 ]

A production line of petroleum fracturing propping agents comprises a feeding system, a pretreatment system, a primary sorting system and a secondary sorting system, wherein the feeding system is used for continuously supplying mortar raw materials from a mortar source to the production line, the pretreatment system is used for carrying out operations including but not limited to dehydration, concentration, impurity removal, wiping and lifting on the mortar raw materials supplied by the feeding system, the primary sorting system is used for carrying out coarse product sorting on the mortar treated by the pretreatment system, and the secondary sorting system is used for carrying out fine product sorting on the mortar sorted by the primary sorting system; the coarse product is a silica sand product with the mesh number within the range of 40-100, and the fine product is a silica sand product with the mesh number within the range of 70-200. The mortar is a mixture which takes water and sand as main components and possibly contains a small amount of impurities such as mud, dirt, garbage and the like, and the types and the contents of the impurities in the mortar are different according to different operation positions of sand extraction ships and different sand sources.

the first cyclone is used for dehydrating and concentrating the mortar;

the first scrubbing machine is used for scrubbing mortar, namely mud on the surface of sand grains is removed through friction, impact, collision and blocking among the sand grains and between the sand grains and the scrubbing machine; the scouring machine can adopt any prior known technology, such as Chinese patent CN209287846U silica sand scouring machine;

the first lifting machine is used for lifting the mortar to a high place; the elevator can adopt any existing known technology, such as Chinese patent CN104454621B differential pressure type evacuation-proof mortar pump, and commercially available pumping devices with various specifications and materials can be used, and are described again and again;

the second cyclone is used for dehydrating and concentrating the mortar;

the second impurity sieve is used for removing impurities except water and sand in the mortar.

The first cyclone and the second cyclone have the same function, are dehydrated and concentrated, but the processed materials are different, the first cyclone is mortar with cement sand impurities, and the second cyclone is a water-sand-mud mixture filtered by the first impurity screen; the cyclone can adopt any prior known technology, such as a hydraulic cyclone for preparing kaolin in Chinese patent CN210207250U, a mining cyclone in CN210207254U and the like.

The concentration is to control the water content of the mortar, so that the water content in the mortar is relatively low, and the production efficiency of the subsequent treatment steps is improved.

The first impurity sieve and the second impurity sieve have the same function and are both filtering functions, but the processed materials are different; the first impurity is a coarse sieve and is mainly used for filtering impurities except water, sand and mud, such as large impurities of branches, leaves, aquatic plants, garbage and the like, and the filtering passing property is high; the materials treated by the second impurity are the mortar after being filtered, scrubbed by a scrubbing machine, dehydrated, concentrated and deslimed, the main components of the mortar are water and sand, the sand material can also play a certain crushing role when being scrubbed by the scrubbing machine, and the large sand grains in the mortar are relatively less, so the second impurity is preferably screened by a fine screen, and the sand grains with larger grain sizes are mainly screened, namely the maximum grain size of the mortar passing through the second impurity basically meets the requirements of maximum specification products (the mesh number is minimum and the grain size is maximum). The impurity sieve can adopt any prior known technology, such as a Chinese patent CN208743002U rolling sieve machine, a CN201524655U rolling sieve and the like.

as shown in fig. 3, the primary classifier is in a barrel shape and is provided with a sand supply pipe (position and material flow direction), a water inlet pipe (position and material flow direction), an overflow port (position and material flow direction), and a discharge port (position and material flow direction); the water inlet pipe is arranged at the bottom of the primary classifier and is used for supplying water to the primary classifier; the sand supply pipe is arranged above the primary classifier and extends into the primary classifier to supply mortar to the primary classifier; the overflow port is arranged on the outer side of the upper edge of the barrel wall of the primary classifier and is used for receiving the materials overflowing from the upper edge of the primary classifier; the discharge port is arranged at the bottom of the primary classifier;

the discharge port of the first sub-machine is connected with the sand supply pipe of the second sub-machine, and the overflow port of the first sub-machine is connected with the sand supply pipe of the third sub-machine;

the discharge ports of the two branch machines are connected with the first finished product pool, and the overflow ports of the two branch machines are connected with the second finished product pool;

the discharge ports of the three-branch machine are connected with the sand supply pipes of the four-branch machine, and the overflow ports of the three-branch machine are connected to the secondary sorting system through pipelines;

and the discharge ports of the four sub-machines are connected with the second finished product pool, and overflow ports of the four sub-machines are connected into the secondary sorting system through pipelines.

the secondary classifier adopts the same structure as the primary classifier;

overflow ports of the three-branch machine and the four-branch machine are connected with sand supply pipes of the five-branch machine through pipeline confluence;

the discharge ports of the five-branch machine are connected with the sand supply pipes of the six-branch machine, and the overflow ports of the five-branch machine are emptied through pipelines extending outwards;

the discharge port of the six-branch machine is connected with the third finished product pool, and the overflow ports of the six-branch machine are connected with the fourth finished product pool.

The sand extraction ship, the first cyclone, the first impurity sieve, the zero classifier, the first scrubbing machine, the first hoister, the second cyclone, the second impurity sieve and the sorter are sequentially connected; the devices are connected in sequence, namely the devices are connected end to end and connected in series according to the sequence, and materials (namely mortar) flow through the devices in sequence and are conveyed and processed;

the concentration tank is funnel-shaped, overflow ports of a third sub-machine and a fourth sub-machine in the primary separation system are connected with a confluent mortar output pipeline above the concentration tank, and a stable ore classifier is connected below the concentration tank;

the stable ore grader adopts the same structure as the primary grader, an overflow port of the stable ore grader is emptied outwards through a pipeline, and a discharge port is connected with a second scrubbing machine;

the second scrubbing machine has the same structure as the first scrubbing machine, the size specification of the second scrubbing machine is smaller than that of the first scrubbing machine, and the outlet of the second scrubbing machine is connected with a second hoisting machine; the scouring machine can adopt any prior known technology, such as Chinese patent CN209287846U silica sand scouring machine;

The zero classifier adopts the same structure as the primary classifier;

the zero classifier is provided with a sand supply pipe, a water inlet pipe, an overflow port and a discharge port, the sand supply pipe of the zero classifier is connected with the first impurity sieve, the water inlet pipe of the zero classifier is connected with an external water source, the overflow port of the zero classifier is emptied through a pipeline extending outwards, and the discharge port of the zero classifier is connected with the first scrubbing machine.

[ example two ]

As shown in fig. 2, on the basis of the above embodiment, the primary sorting system of the present embodiment is provided with two sets of parallel primary classifiers, each of the primary classifier, the secondary classifier, the tertiary classifier and the quartering classifier is provided with two sets;

The first distributor and the second distributor (hereinafter collectively referred to as distributors) have the same structure; the distributor is provided with a tee joint structure, the inlet end of the tee joint is connected with an upstream sand inlet pipeline, the mortar conveyed in the sand inlet pipeline is usually unevenly dispersed, namely, sand is mostly concentrated on the pipe wall, and if the mortar is directly fed into a classifier (such as a classifier and a classifier with five classifiers) of a sorting system, excessive heterogeneity of a water-sand dispersion system in the classifier is easily caused, so that the classification effect is influenced. On the basis, a mixing cavity is arranged at the intersection of the three ways of the distributor, the mixing cavity is a large-space cavity body in the shape of a box or a sphere and the like, mortar conveyed from the inlet end of the distributor reaches the mixing cavity, the mortar is rolled and stirred in the mixing cavity to be uniformly mixed, and the mortar entering the classifier from the outlet end of the mixing cavity is beneficial to being quickly dispersed into the classifier.

In addition, the primary sorting system and/or the secondary sorting system adopts two sets of parallel classifiers, and the functions of the primary sorting system and/or the secondary sorting system are to improve the classification efficiency, balance the mortar supply amount of the feeding system, the pretreatment system and the secondary treatment system, and enable the supplied mortar to dispersedly enter the parallel sorting system so as to control the flow, the flow velocity and relevant process parameters of each classifier, thereby achieving the purpose of adjusting the classification level.

[ EXAMPLE III ]

On the basis of the above embodiments, the primary classifier described in this embodiment is in the shape of a barrel, the inverted conical casing 1 is provided at the bottom of the barrel, as shown in fig. 4, a plurality of water inlets 101 are annularly distributed on the side surface of the conical casing 1, so that the water inlets 101 are annularly distributed in multiple layers, the upper edge of the conical casing 1 is welded to the inner side surface of the barrel, the lower edge of the conical casing 1 is welded to the bottom surface of the barrel, the barrel is divided into an upper cavity and a lower cavity by the conical casing 1, the upper cavity is a sedimentation space 2, the lower cavity is a water inlet space 3, and a water inlet pipe 301 is provided on the side wall of one side of the water; a discharge port 302 is arranged below the conical shell 1; the outlet 302 is communicated with the bottom surface of the barrel, and a valve is arranged in the outlet 302 for controlling the sand discharge amount; the overflow groove 4 is arranged on the outer side above the drum, the overflow groove 4 is in a circular ring shape and is welded at the upper end of the drum, the bottom surface of the overflow groove 4 is an inclined plane, an overflow port 401 is arranged at the lowest position of the bottom surface, and the outer edge of the overflow groove 4 is higher than the upper edge of the drum, so that overflow water cannot flow out of the pool; a plurality of sand supply pipes 5 are arranged on the side surface of the drum below the bottom surface of the overflow groove 4, and the sand supply pipes 5 are arranged in a tangent way with the side surface of the drum.

In order to change the water flow direction, the water inlets 101 on the side of the conical shell 1 are all provided with water spraying devices 6, as shown in fig. 5, 6 and 7, each water spraying device 6 comprises a water inlet screw hole 601, a hollow spherical shell 602, a bolt 603, a spherical support 604, a spherical cover 605 and a water guide pipe 606, the water guide pipe 606 and the spherical cover 605 are integrated, the water guide pipe 606 is a bent pipe, the water inlet screw hole 601 and the hollow spherical shell 602 are integrated, the spherical support 604 and the spherical cover 605 are connected through the bolt 603 and are in spherical hinge connection with the hollow spherical shell 602, the water guide pipe 606 can rotate around the axis of the water inlet screw hole 601 and can swing around the axis of the water inlet screw hole 601, and the water spraying device 6 is screwed on the water inlets 101 through the external threads of the water inlet. The water spraying device 6 can change the water flow direction artificially, can realize cyclone separation or sedimentation separation independently, and can also realize a separation mode combining the sedimentation separation and the cyclone separation.

In order to realize linkage of a plurality of water spraying devices 6, as shown in fig. 8, a support arm 607 is welded on a water conduit 606 of the water spraying device 6, the support arm is connected with a connecting rod 609 through a ball hinge 608, a sliding sleeve 610 is welded at the lower end of the connecting rod 609, the sliding sleeve 610 is sleeved on a linkage ring 7, stoppers 701 are arranged on two sides of the sliding sleeve 610, the stoppers 701 are fixedly connected with the linkage ring 7, the linkage ring 7 is rotated, and all the water conduits 606 of the water spraying device 6 connected with the linkage ring 7 can rotate around the axes of respective water inlet screw holes 601, so that the direction of water flow in one dimension is.

In order to change the direction of the water flow along the side surface of the barrel, as shown in figures 9, 10, 11 and 12, at least three guide grooves 8 are uniformly arranged on the same horizontal plane of the inner side surface of the conical shell 1, this guide groove 8 is vertically arranged, and the three guide grooves 8 thus arranged have at least two layers, the distance between the upper part and the lower part is large, a slide block 9 is arranged in the guide groove 8, one end of the slide block 9 is a support sleeve 901, the linkage ring 7 passes through the support sleeve 901, the linkage rings 7 are fixedly connected by three vertical rods 10 to form an inverted cone-shaped frame, an operating rod 11 is fixedly connected at the lower end of the frame, the operating rod 11 is fixed by a fixing device 12, the rotation and swing of the water guide pipe (606) are changed by the rotation and up-and-down movement of the operating lever 11, thereby changing the space direction of water flow injection and realizing the separation mode of independent cyclone separation or sedimentation separation or the combination of cyclone separation and sedimentation separation.

A process for producing a petroleum fracturing proppant, the process comprising:

Claims

1. The utility model provides an oil fracturing proppant production line, the production line includes feeding system, pretreatment system, once selects separately the system, the secondary system of selecting separately, once select separately the system and include a grader, its characterized in that: the primary classifier is in a barrel shape, an inverted conical shell (1) is arranged at the bottom of the barrel, a plurality of water inlet holes (101) are annularly distributed on the side surface of the conical shell (1), the water inlet holes (101) are annularly distributed and have multiple layers, the upper edge of the conical shell (1) is welded with the inner side surface of the barrel, the lower edge of the conical shell (1) is welded with the bottom surface of the barrel, the barrel is divided into an upper cavity and a lower cavity by the conical shell (1), the upper cavity is a sedimentation space (2), the lower cavity is a water inlet space (3), and a water inlet pipe (301) is arranged on the side wall of one side of the water inlet space (3; a discharge port (302) is arranged below the conical shell (1); the outlet (302) is communicated with the bottom surface of the barrel, and a valve is arranged in the outlet (302); an overflow groove (4) is arranged on the outer side above the barrel, the bottom surface of the overflow groove (4) is an inclined plane, an overflow port (401) is arranged at the lowest position of the bottom surface, and the upper edge of the overflow groove (4) is higher than that of the barrel; a plurality of sand feeding pipes (5) are arranged on the side surface of the barrel below the bottom surface of the overflow groove (4).

2. The oil fracturing proppant production line of claim 1, wherein: the water spraying device is characterized in that a plurality of water inlet holes (101) are annularly distributed on the side face of the conical shell (1), the water spraying device (6) comprises a water inlet screw hole (601), a hollow spherical shell (602), a bolt (603), a spherical support (604), a spherical cover (605) and a water guide pipe (606), the water guide pipe (606) and the spherical cover (605) are integrated, the water guide pipe (606) is a bent pipe, the water inlet screw hole (601) and the hollow spherical shell (602) are integrated, the spherical support (604) and the spherical cover (605) are connected through the bolt (603) and are connected with the hollow spherical shell (602) in a spherical hinge mode, the water guide pipe (606) can rotate around the axis of the water inlet screw hole (601) and can swing around the axis of the water inlet screw hole (601), and the water spraying device (6) is screwed on the water inlet hole (101) through external threads of the water inlet screw hole (601).

3. The production line of the oil fracturing propping agent according to claim 2, characterized in that the water guide pipe (606) of the water spraying device (6) is welded with a support arm (607) and is connected with a connecting rod (609) through a ball hinge (608), the lower end of the connecting rod (609) is welded with a sliding sleeve (610), the sliding sleeve (610) is sleeved on the linkage ring (7), two sides of the sliding sleeve (610) are provided with stoppers (701), and the stoppers (701) are fixedly connected with the linkage ring (7).

4. The production line of the oil fracturing propping agent according to claim 3, characterized in that at least three guide grooves (8) are uniformly arranged on the same horizontal plane on the inner side surface of the conical shell (1), at least two layers of at least three guide grooves (8) are uniformly arranged on the same horizontal plane, a sliding block (9) is arranged in each guide groove (8), one end of each sliding block (9) is a support sleeve (901), a linkage ring (7) penetrates through the support sleeve (901), the linkage rings (7) are fixedly connected through three vertical rods (10) to form an inverted conical frame, an operating rod (11) is fixedly connected to the lower end of the frame, and the operating rod (11) is fixed by a fixing device (12).