Quartz sand washing and drying equipment for fracturing

Abstract

The invention relates to the technical field of quartz sand processing equipment, and discloses quartz sand washing and drying equipment for fracturing, which comprises a wheel type sand washer, a dewatering vibrating screen and a roller dryer, a conveying mechanism is arranged between the dewatering vibrating screen and the roller dryer, and a gas circulating mechanism is arranged on the roller dryer. A waste heat utilization mechanism is arranged in the conveying mechanism, a waste water circulation mechanism is arranged at the end A of the wheel type sand washer, a fine sand collection mechanism is arranged on the waste water circulation mechanism, a dust collection mechanism is arranged on the gas circulation mechanism, and a temperature sensor is arranged on the inner wall of the roller dryer. The drying temperature is regulated and controlled in real time through the temperature sensor, quartz sand is preheated through waste heat, and energy consumption is reduced; a wastewater circulating mechanism and a fine sand collecting mechanism are adopted, so that the utilization rate of water resources and gravel resources is increased; and the dust collecting bag easy to disassemble is designed, dust emission is reduced, and the environment-friendly performance and the drying quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand processing equipment, in particular to quartz sand washing and drying equipment for fracturing. Background Art

[0002] With the increasing demand for fracturing quartz sand, the water washing and drying equipment used in its production has become an important part of the quartz sand processing technology. However, the existing water washing and drying equipment has obvious deficiencies in resource utilization, energy consumption, environmental protection performance and automation level. The specific problems are analyzed as follows:

[0003] In traditional quartz sand production, wheel or spiral sand washing machines are usually used in the cleaning process. Although they can effectively clean the dirt and impurities on the surface of quartz sand, the phenomenon of direct discharge of wastewater is relatively common, resulting in serious loss of fine sand particles in the wastewater, which not only increases the pressure of wastewater treatment, but also wastes available fine sand resources;

[0004] The drying process usually uses a drum dryer to dehydrate the quartz sand through high-temperature drying. However, traditional equipment only relies on a single heat source (such as electric heating or gas heating) to provide heat. The exhaust gas in the drying process contains waste heat, and the exhaust gas is directly discharged without recycling and treatment, which not only wastes energy but also aggravates environmental pollution.

[0005] The drum dryer will generate a large amount of dusty exhaust gas during the drying process. If the exhaust gas is not effectively filtered, it is easy to be directly discharged into the air, causing pollution to the production environment and the surrounding environment. Traditional dust collection devices are usually simple bags or electrostatic precipitators, which have limited dust filtration efficiency and are difficult to replace and clean;

[0006] Therefore, a quartz sand washing and drying device for fracturing is proposed to solve the above problems. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides a quartz sand washing and drying equipment for fracturing, which solves the problems of serious loss of fine sand in the washing process, waste of waste gas heat energy in the drying process, and difficulty in dust collection and maintenance in traditional quartz sand production.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a quartz sand washing and drying equipment for fracturing, comprising a wheel-type sand washer, a dewatering vibrating screen and a drum dryer, a conveying mechanism is arranged between the dewatering vibrating screen and the drum dryer, a gas circulation mechanism is arranged on the drum dryer, a waste heat utilization mechanism is arranged in the conveying mechanism, a waste water circulation mechanism is arranged at the A end of the wheel-type sand washer, a fine sand collection mechanism is arranged on the waste water circulation mechanism, and a dust collection mechanism is arranged on the gas circulation mechanism;

[0009] The wastewater circulation mechanism includes a sedimentation tank, which is connected to the A end of the wheel sand washing machine through a water outlet pipe 1, and the sedimentation tank is connected to the input end of the water pump through a water inlet pipe. The wheel sand washing machine is provided with a placement rack, and the placement rack is provided with a pipe rack. A spray pipe is provided in the pipe rack, and multiple groups of nozzles are evenly distributed laterally on the spray pipe. The output end of the water pump is connected to the spray pipe through a water outlet pipe 2.

[0010] Preferably, the conveying mechanism includes a conveying cabin, which is arranged between the dehydration vibrating screen and the drum dryer. A conveying shaft is arranged in the conveying cabin, and auger blades are arranged on the conveying shaft. A conveying motor is arranged in the conveying cabin, and the output end of the conveying motor is connected to the conveying shaft.

[0011] Preferably, the gas circulation mechanism includes a circulation pipe 1, which is arranged on the drum dryer, and the circulation pipe 1 is connected to the input end of the circulation air pump, and the input end of the circulation air pump is connected to the conveying cabin in the conveying mechanism through the circulation pipe 2.

[0012] Preferably, the waste heat utilization mechanism includes an air outlet hopper, which is arranged on the top wall of the conveying cabin in the conveying mechanism, a rotating shaft is arranged in the conveying cabin, stirring blades are arranged on the rotating shaft, a motor 2 is arranged in the conveying cabin, the output end of the motor 2 is fixedly connected to the rotating shaft, and a sealing assembly is arranged on the bottom wall of the conveying cabin.

[0013] Preferably, the sealing assembly includes a baffle, which is arranged on the inner bottom wall of the conveying cabin. A sealing motor is arranged in the conveying cabin. The output end of the sealing motor is connected to the baffle through a guide rope. Multiple groups of sealing springs are arranged between the baffle and the inside of the conveying cabin.

[0014] Preferably, the fine sand collection mechanism includes a collection frame, which is arranged in a sedimentation box, a pull ring is arranged on the collection frame, a plurality of groups of mounting blocks are arranged on the top of the sedimentation box, a winding shaft is arranged between the mounting blocks, a winding motor is arranged on one of the mounting blocks, the output end of the winding motor is fixedly connected to the winding shaft, the winding shaft and the pull ring are connected by a cable, a moving block is arranged on the inner wall of the sedimentation box, a moving assembly is arranged in the moving block, a connecting rod is arranged on the moving assembly, and a push plate is arranged on the connecting rod.

[0015] Preferably, the moving component includes multiple groups of pulleys, multiple pulleys are arranged in the moving block, the pulleys are connected by a transmission belt, a connecting block is provided on the transmission belt, the transmission belt is connected to a connecting member through the connecting block, a slider is provided on the connecting member, the slider is slidably connected to a slide rail, a motor three is provided in the moving block, the output end of the motor three is connected to one of the pulleys, and a connecting rod is provided on the connecting member away from the slide rail.

[0016] Preferably, the dust collection mechanism includes a collection pipe, which is arranged on a circulation pipe in the gas circulation mechanism. The collection pipe is connected to a pipe cover via a hinge. A slot is opened in the collection pipe, a clamping ring is arranged in the slot, and a dust collection bag is arranged on the clamping ring.

[0017] Preferably, a resistance heating wire is provided inside the drum dryer, a fixed platform is provided on the outside of the drum dryer, a plurality of sets of rotating wheels are provided on the fixed platform, one of the rotating wheels is provided with an output end of motor 1, a rotating ring is provided on the outer wall of the drum dryer, the rotating ring is slidably connected to the rotating wheel, a temperature sensor is provided on the inner wall of the drum dryer, and the temperature sensor transmits the collected data to the central control system.

[0018] Preferably, the central control system includes:

[0019] Acquisition module: It is used to transmit the data collected by the temperature sensor to the central control system;

[0020] Analysis module: It analyzes the data collected in the central control system through the data processing unit;

[0021] Driving module: It drives the resistance heating wire through the analyzed information.

[0022] The present invention provides a quartz sand washing and drying device for fracturing, which has the following beneficial effects:

[0023] 1. The present invention collects temperature data in the drum dryer in real time through a temperature sensor, dynamically adjusts the output power of the resistance heating wire, and recycles the waste heat of the exhaust gas generated by the drum dryer through a waste heat utilization mechanism. The exhaust gas enters the conveying cabin from the air outlet hopper, and the preheating treatment of the quartz sand is achieved in combination with the stirring blades in the conveying cabin, thereby achieving the technical effect of effectively reducing the energy consumption of the drum dryer. Compared with the technical solution in the prior art that solely relies on a drum dryer to heat and dry sand and gravel, the present invention effectively improves the shortcomings of high energy consumption and serious waste of heat energy in the drying process, and improves the overall thermal efficiency of the equipment.

[0024] 2. The present invention adopts a wastewater circulation mechanism and a fine sand collection mechanism, separates wastewater and fine sand through a sedimentation box, and uses a water pump to recycle the clean water on the upper layer into the wheel sand washing machine for recycling. At the same time, the precipitated fine sand is recovered to the collection frame through the mobile component push plate, achieving the technical effects of high fine sand recovery rate and recycling of water resources, reducing water resource consumption, avoiding serious loss of fine sand, improving resource utilization, and reducing environmental pollution.

[0025] 3. The present invention utilizes a dust collection bag to filter dust in the exhaust gas during the gas circulation process, and designs an easily detachable pipe cover and card slot structure, so that after work, the pipe cover can be conveniently opened and the card ring can be easily removed, so that the dust in the dust collection bag can be centrally processed and the dust collection bag can be more easily replaced, thereby achieving the technical effect of high sand and gravel drying accuracy and low dust emission, and significantly improving the drying quality and environmental protection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of the present invention;

[0027] Figure 2 It is a top view schematic diagram of the present invention;

[0028] Figure 3 It is a left side schematic diagram of the present invention;

[0029] Figure 4 It is a cross-sectional schematic diagram of the sedimentation box of the present invention;

[0030] Figure 5 is a schematic diagram of a mobile assembly of the present invention;

[0031] Figure 6 It is a schematic diagram of the dust collection mechanism of the present invention;

[0032] Figure 7 It is a cross-sectional schematic diagram of the drum dryer of the present invention;

[0033] Figure 8 It is a schematic diagram of the waste heat utilization mechanism and the conveying mechanism of the present invention;

[0034] Fig. 9 It is a flow chart of the central control system of the present invention.

[0035] Among them, 1. Wheel sand washing machine; 2. Dehydration vibration screen; 3. Drum dryer; 301. Resistance heating wire; 302. Rotating ring; 303. Rotating wheel; 304. Motor 1; 305. Fixed table; 4. Conveying mechanism; 401. Conveying cabin; 402. Conveying shaft; 403. Auger blade; 404. Conveying motor; 5. Gas circulation mechanism; 501. Circulation pipe 1; 502. Circulation air pump; 503. Circulation pipe 2; 6. Waste heat utilization mechanism; 601. Air outlet hopper; 602. Rotating shaft; 603. Motor 2; 604. Stirring blade; 605. Baffle; 606. Sealed motor; 607. Guide rope; 608. Sealed spring; 7. Wastewater circulation mechanism; 701. Water outlet pipe 1; 702. Sedimentation box ;703, water inlet pipe;704, water pump;705, water outlet pipe 2;706, placement rack;707, pipe rack;708, spray pipe;709, nozzle;8, fine sand collection mechanism;801, collection frame;802, pull ring;803, cable;804, mounting block;805, rewinding shaft;806, rewinding motor;807, moving block;808, motor 3;809, pulley;810, transmission belt;811, connecting block;812, slide rail;813, slider;814, connecting piece;815, connecting rod;816, push plate;9, dust collection mechanism;901, collection pipe;902, pipe cover;903, slot;904, snap ring;905, dust collection bag;10, temperature sensor. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Please see attached Figure 1 , Attachment Figure 2 and attached Figure 8 The embodiment of the present invention provides a quartz sand washing and drying device for fracturing, comprising a wheeled sand washer 1, a dewatering vibrating screen 2 and a drum dryer 3, a conveying mechanism 4 is arranged between the dewatering vibrating screen 2 and the drum dryer 3, the conveying mechanism 4 comprises a conveying cabin 401, the conveying cabin 401 is arranged between the dewatering vibrating screen 2 and the drum dryer 3, a conveying shaft 402 is arranged in the conveying cabin 401, an auger blade 403 is arranged on the conveying shaft 402, a conveying motor 404 is arranged in the conveying cabin 401, and the output end of the conveying motor 404 is connected to the conveying shaft 402;

[0038] The wheel sand washing machine 1 cleans the surface of the quartz sand, removes the residual moisture on the surface of the sand and gravel through the dehydration vibrating screen 2, and uses the drum dryer 3 to completely dry the sand and gravel. The conveying cabin 401 serves as the core part of the conveying mechanism 4, and provides an installation place for the conveying part and subsequent waste heat utilization components. The conveying shaft 402 serves as a transmission component, which plays the role of installing the auger blade 403 and transmitting the movement of the conveying motor 404. The auger blade 403 conveys the quartz sand from the dehydration vibrating screen 2 to the drum dryer 3 by spiral pushing. Its spiral structure design can effectively prevent the quartz sand from blocking the pipeline during the conveying process. The conveying motor 404 provides power support for the conveying process of the entire mechanism.

[0039] Please refer to the attached Figure 1 -Attached Figure 3 The drum dryer 3 is provided with a gas circulation mechanism 5, the gas circulation mechanism 5 includes a circulation pipe 1 501, the circulation pipe 1 501 is provided on the drum dryer 3, the circulation pipe 1 501 is connected to the input end of the circulation gas pump 502, and the input end of the circulation gas pump 502 is connected to the conveying cabin 401 in the conveying mechanism 4 through the circulation pipe 2 503;

[0040] The circulation pipe 1 501 and the circulation pipe 2 503 serve to transport gas, and the circulation air pump 502 provides power for extracting hot air from the drum dryer 3 .

[0041] Please refer to the attached Figure 8 , a waste heat utilization mechanism 6 is arranged in the conveying mechanism 4, and the waste heat utilization mechanism 6 includes a gas outlet hopper 601, and the gas outlet hopper 601 is arranged on the top wall of the conveying cabin 401 in the conveying mechanism 4, and a rotating shaft 602 is arranged in the conveying cabin 401, and a stirring blade 604 is arranged on the rotating shaft 602, and a motor 2 603 is arranged in the conveying cabin 401, and the output end of the motor 2 603 is fixedly connected to the rotating shaft 602, and a sealing component is arranged on the bottom wall of the conveying cabin 401;

[0042] The gas outlet 601 is used to guide the high-temperature exhaust gas discharged from the drum dryer 3 into the interior of the conveying chamber 401. The second motor 603 provides power for stirring the quartz sand. The rotating shaft 602 serves to install the stirring blades 604 and transmit the output motion of the second motor 603. The stirring blades 604 stir and turn the quartz sand through the driving of the rotating shaft 602, so that the quartz sand can be fully preheated in the conveying chamber 401.

[0043] The sealing assembly includes a baffle 605, which is arranged on the inner bottom wall of the conveying cabin 401. A sealing motor 606 is arranged in the conveying cabin 401. The output end of the sealing motor 606 is connected to the baffle 605 through a guide cable 607. A plurality of sealing springs 608 are arranged between the baffle 605 and the inside of the conveying cabin 401.

[0044] The baffle 605 can block the quartz sand so that the quartz sand can be preheated in the conveying chamber 401 before being conveyed into the drum dryer 3 through the auger blade 403. The sealing motor 606 provides power to open the baffle 605 so that the baffle 605 can be retracted into the conveying chamber 401. The guide rope 607 starts the traction function. After being reeled in by the sealing motor 606, the guide rope 607 can pull the baffle 605 to move. The elastic potential energy of the sealing spring 608 can realize the rebound of the baffle 605 after being retracted into the conveying chamber 401.

[0045] Please refer to the attached Figure 1 -Attached Figure 2 The A end of the wheel sand washing machine 1 is provided with a wastewater circulation mechanism 7, and the A end of the wheel sand washing machine 1 is a water outlet. The wastewater circulation mechanism 7 includes a sedimentation tank 702, and the sedimentation tank 702 is connected to the A end of the wheel sand washing machine 1 through a water outlet pipe 1 701. The sedimentation tank 702 is connected to the input end of a water pump 704 through a water inlet pipe 703. A placement rack 706 is provided on the wheel sand washing machine 1, and a pipe rack 707 is provided on the placement rack 706. A spraying pipe 708 is provided in the pipe rack 707, and a plurality of groups of nozzles 709 are evenly distributed laterally on the spraying pipe 708. The output end of the water pump 704 is connected to the spraying pipe 708 through a water outlet pipe 2 705;

[0046] The sedimentation tank 702 is a storage component for wastewater circulation and fine sand recovery. The water pump 704 provides power for extracting the wastewater after sedimentation for secondary utilization. The outlet pipe 1 701 can transport the wastewater generated by the wheeled sand washing machine 1 to the sedimentation tank 702. The water inlet pipe 703 and the outlet pipe 2 705 play a connecting role, and can transport the circulating water after sedimentation to the spray pipe 708. The spray pipe 708 provides a place for the installation of the nozzle 709, so that the water entering the spray pipe 708 can be dispersed to each nozzle 709. The water sprayed from the nozzle 709 can rinse the quartz sand on the wheel bucket of the wheeled sand washing machine 1 again, so that the washing effect of the quartz sand is better. The placement rack 706 and the pipe rack 707 can fix the spray pipe 708 to prevent the spray pipe 708 from moving.

[0047] Please refer to the attached Figure 4 -Attached Figure 5, a fine sand collecting mechanism 8 is provided on the wastewater circulation mechanism 7, the fine sand collecting mechanism 8 comprises a collecting frame 801, the collecting frame 801 is arranged in the sedimentation box 702, a pull ring 802 is provided on the collecting frame 801, a plurality of mounting blocks 804 are provided on the top of the sedimentation box 702, a reeling shaft 805 is provided between the mounting blocks 804, a reeling motor 806 is provided on one of the mounting blocks 804, an output end of the reeling motor 806 is fixedly connected to the reeling shaft 805, the reeling shaft 805 is connected to the pull ring 802 via a cable 803, a moving block 807 is provided on the inner wall of the sedimentation box 702, a moving assembly is provided in the moving block 807, a connecting rod 815 is provided on the moving assembly, and a push plate 816 is provided on the connecting rod 815;

[0048] The collecting frame 801 is a component for collecting and storing the fine sand accumulated in the sedimentation box 702. It has drainage holes so that the water in the fine sand can seep out, which is the key to harvesting the dried fine sand later. The function of the mounting block 804 is to provide a place for installing the winding motor 806 and the winding shaft 805. The winding shaft 805 can rotate under the power support of the winding motor 806. The rotating winding shaft 805 can wind up the cable 803. The cable 803 is connected through the pull ring 802, so that the collecting frame 801 can be suspended in the air, so that the water in the fine sand can be discharged from the seepage holes of the collecting frame 801 under the action of gravity. The connecting rod 815 plays the role of installing the push plate 816. The push plate 816 is tangent to the inner bottom wall of the sedimentation box 702, so that the push plate 816, driven by the moving component, pushes the accumulated fine sand into the collecting frame 801.

[0049] The moving assembly includes a plurality of pulleys 809, and the plurality of pulleys 809 are arranged in the moving block 807. The pulleys 809 are connected by a transmission belt 810. The transmission belt 810 is provided with a connecting block 811. The transmission belt 810 is connected to a connecting member 814 through the connecting block 811. The connecting member 814 is provided with a slider 813. The slider 813 is slidably connected to a slide rail 812. A motor 3 808 is arranged in the moving block 807. The output end of the motor 3 808 is connected to one of the pulleys 809. A connecting rod 815 is arranged on the side of the connecting member 814 away from the slide rail 812.

[0050] Motor three 808 is used to provide power for the push plate 816 to scrape fine sand. The push plate 816 can be moved horizontally through the transmission method of the pulley 809 and the transmission belt 810. The connecting block 811 plays a connecting role, so that the connecting member 814 can move at the same frequency as a certain point of the transmission belt 810. During movement, the movement trajectory of the connecting member 814 is limited by the movement of the slider 813 and the slide rail 812. The connecting member 814 plays a bearing role, can install the push plate 816 and the connecting rod 815, and drive the push plate 816 by itself.

[0051] Please refer to the attached Figure 6 The gas circulation mechanism 5 is provided with a dust collecting mechanism 9, which includes a collecting pipe 901, which is provided on a circulation pipe 501 in the gas circulation mechanism 5, and the collecting pipe 901 is connected to a pipe cover 902 through a hinge, and a card slot 903 is provided in the collecting pipe 901, and a card ring 904 is provided in the card slot 903, and a dust collecting bag 905 is provided on the card ring 904;

[0052] The collecting tube 901 serves as the installation body of the dust collecting mechanism 9, and the tube cover 902 can seal and open the collecting tube 901, so that the dust collecting bag 905 inside the collecting tube 901 can be easily removed. The card slot 903 and the card ring 904 cooperate with each other to install the dust collecting bag 905 while avoiding sliding due to hot air during operation.

[0053] Please see attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 7 The B end of the drum dryer 3 is a discharge port, a resistance heating wire 301 is arranged inside the drum dryer 3, a fixed platform 305 is arranged outside the drum dryer 3, a plurality of rotating wheels 303 are arranged on the fixed platform 305, one of the rotating wheels 303 is provided with an output end of a motor 1 304, a rotating ring 302 is arranged on the outer wall of the drum dryer 3, the rotating ring 302 is slidably connected with the rotating wheel 303, a temperature sensor 10 is arranged on the inner wall of the drum dryer 3, and the temperature sensor 10 transmits the collected data to the central control system;

[0054] The resistance heating wire 301 can generate heat after being energized, thereby heating up the inside of the drum dryer 3, thereby achieving the purpose of drying the quartz sand. The rotating ring 302 cooperates with the rotating wheel 303 to convert the power output by the motor 304 into the rotation of the drum dryer 3 itself, thereby avoiding local overheating of the quartz sand inside the drum dryer 3 during the drying process. The fixed platform 305 plays a key role in installing the motor 304 and supporting the drum dryer 3. The temperature sensor 10 can detect the temperature of the preheated quartz sand, which is used as a credential for adjusting the output power of the resistance heating wire 301, thereby improving the energy consumption of the equipment.

[0055] Please see attached Fig. 9 , the central control system includes:

[0056] Acquisition module: used to transmit the data collected by the temperature sensor 10 to the central control system;

[0057] Analysis module: It analyzes the data collected in the central control system through the data processing unit;

[0058] Driving module: It drives the resistance heating wire 301 through the analyzed information.

[0059] Working principle: the quartz sand to be cleaned enters the cleaning tank of the wheel sand washing machine 1. Driven by the rotation of the wheel bucket, the sand and gravel are stirred in the cleaning tank and contacted with water. In this process, the fine sand enters the sedimentation tank 702 with the wastewater from the outlet through the outlet pipe 1 701. Under the action of gravity, the turbid wastewater settles and the fine sand sinks to the bottom. The water inlet pipe 703 draws the upper layer of clean water to the outlet pipe 2 705 under the pumping of the water pump 704, and then enters the spray pipe 708, and is sprayed by the nozzle 709 on the spray pipe 708. The sprayed water flow can rinse the quartz sand on the wheel bucket again and flow back to the wheel sand washing machine 1. As the wheel bucket rotates, the cleaned sand and gravel are brought out of the water by the wheel bucket blades, and the cleaned quartz sand is unloaded from the wheel bucket outlet;

[0060] The quartz sand reaches the dehydration vibration screen 2 from the discharge port, and then the dehydration vibration screen 2 is started to vibrate and separate the residual water droplets on the surface of the quartz sand, and the dehydrated quartz sand enters the conveying cabin 401, and then the conveying motor 404 is started to rotate the conveying shaft 402, and the auger blades 403 on the conveying shaft 402 convey the dehydrated quartz sand from the conveying cabin 401 to the drum dryer 3;

[0061] After entering the drum dryer 3, the resistance heating wire 301 in the drum dryer 3 is started to heat up the inside thereof, and then the motor 1 304 is started, and the motor 1 304 rotates one of the rotating wheels 303, and the rotating wheel 303 drives the drum dryer 3 to rotate through the rotating ring 302, so that the quartz sand inside is fully dried, and the dried quartz sand is discharged from the discharge port;

[0062] The waste gas generated during the drying process carries residual heat, and then the circulating air pump 502 is started and extracted through the circulating pipe 1 501. When the gas flows through the circulating pipe 1 501, the dust and other impurities contained in the gas are collected by the dust collection bag 905 in the clamp ring 904, and the filtered gas is transported to the transport cabin 401 through the circulating pipe 2 503;

[0063] After this part of the waste gas with residual temperature enters the conveying cabin 401, the baffle 605 blocks the bottom wall of the conveying cabin 401, and the motor 2 603 is started. After starting, the motor 2 603 rotates the rotating shaft 602, and the stirring blade 604 rotates at the same frequency as the rotating shaft 602. The stirring blade 604 fully stirs the next batch of quartz sand, and the gas with waste heat is discharged from the gas outlet 601 to preheat the stirred quartz sand. After the preheated quartz sand, the sealing motor 606 is started, and the guide rope 607 pulls the baffle 605 into the conveying cabin 401. At this time, the sealing spring 608 is compressed, and the preheated quartz sand is again conveyed to the drum dryer 3 through the conveying shaft 402 and the auger blade 403. The temperature sensor 10 in the drum dryer 3 detects the temperature of this part of the quartz sand, and the detected data is fed back to the central control system. Then the drive module in the central control system adjusts the output power of the resistance heating wire 301;

[0064] After the work is completed, most of the fine sand is deposited at the bottom of the sedimentation box 702, and then the motor 808 in the moving block 807 is started, so that the pulley 809 rotates, and the transmission belt 810 is affected by the pulley 809 to move, and the transmission belt 810 drives the connecting member 814 to move together through the connection of the connecting block 811. During the movement of the connecting member 814, the slider 813 on the connecting member 814 moves along the predetermined track of the slide rail 812. When the connecting member 814 moves, the connecting rod 815 and the push plate 816 outside the connecting member 814 move accordingly, and the push plate 816 pushes the fine sand into the collection frame 801. At this time, there is still water in the fine sand. At this time, the reeling motor 806 on the mounting block 804 is started, and the reeling shaft 805 rotates at the same time. The reeling shaft 805 reels the cable 803, and the collecting frame 801 connected to the cable 803 through the pull ring 802 is affected and starts to rise. After rising, it hovers, and the remaining water in the fine sand drains out from the drainage hole in the collecting frame 801. The pipe cover 902 on the collecting pipe 901 is opened by the hinge, and the snap ring 904 in the card slot 903 is easily taken out, so that the dust in the dust collection bag 905 can be centrally processed and the dust collection bag 905 can be replaced in time.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quartz sand washing and drying device for fracturing, comprising a wheel-type sand washer (1), a dewatering vibrating screen (2) and a drum dryer (3), characterized in that: A conveying mechanism (4) is provided between the dewatering vibration screen (2) and the drum dryer (3), a gas circulation mechanism (5) is provided on the drum dryer (3), a waste heat utilization mechanism (6) is provided in the conveying mechanism (4), a waste water circulation mechanism (7) is provided at the A end of the wheel-type sand washing machine (1), a fine sand collection mechanism (8) is provided on the waste water circulation mechanism (7), and a dust collection mechanism (9) is provided on the gas circulation mechanism (5); The wastewater circulation mechanism (7) comprises a sedimentation tank (702), the sedimentation tank (702) being connected to the A end of the wheel-type sand washing machine (1) via a first water outlet pipe (701), the sedimentation tank (702) being connected to the input end of a water pump (704) via a water inlet pipe (703), the wheel-type sand washing machine (1) being provided with a placement rack (706), the placement rack (706) being provided with a pipe rack (707), a spraying pipe (708) being provided inside the pipe rack (707), a plurality of groups of spray heads (709) being evenly spaced and laterally distributed on the spraying pipe (708), and the output end of the water pump (704) being connected to the spraying pipe (708) via a second water outlet pipe (705).

2. The quartz sand washing and drying equipment for fracturing according to claim 1, characterized in that: The conveying mechanism (4) comprises a conveying cabin (401), the conveying cabin (401) being arranged between the dehydration vibration screen (2) and the drum dryer (3), a conveying shaft (402) being arranged in the conveying cabin (401), an auger blade (403) being arranged on the conveying shaft (402), a conveying motor (404) being arranged in the conveying cabin (401), and an output end of the conveying motor (404) being connected to the conveying shaft (402).

3. The quartz sand washing and drying equipment for fracturing according to claim 1, characterized in that: The gas circulation mechanism (5) comprises a circulation pipe 1 (501), wherein the circulation pipe 1 (501) is arranged on the drum dryer (3), and the circulation pipe 1 (501) is connected to the input end of a circulation air pump (502), and the input end of the circulation air pump (502) is connected to the conveying cabin (401) in the conveying mechanism (4) through a circulation pipe 2 (503).

4. The quartz sand washing and drying equipment for fracturing according to claim 1, characterized in that: The waste heat utilization mechanism (6) comprises an air outlet hopper (601), the air outlet hopper (601) being arranged on the inner top wall of a conveying cabin (401) in the conveying mechanism (4), a rotating shaft (602) being arranged in the conveying cabin (401), a stirring blade (604) being arranged on the rotating shaft (602), a second motor (603) being arranged in the conveying cabin (401), an output end of the second motor (603) being fixedly connected to the rotating shaft (602), and a sealing component being arranged on the inner bottom wall of the conveying cabin (401).

5. The quartz sand washing and drying equipment for fracturing according to claim 4, characterized in that: The sealing assembly comprises a baffle (605), wherein the baffle (605) is arranged on the inner bottom wall of the conveying cabin (401), a sealing motor (606) is arranged in the conveying cabin (401), an output end of the sealing motor (606) is connected to the baffle (605) via a guide rope (607), and a plurality of groups of sealing springs (608) are arranged between the baffle (605) and the inside of the conveying cabin (401).

6. The quartz sand washing and drying equipment for fracturing according to claim 1, characterized in that: The fine sand collection mechanism (8) comprises a collection frame (801), the collection frame (801) is arranged in a sedimentation box (702), a pull ring (802) is arranged on the collection frame (801), a plurality of groups of mounting blocks (804) are arranged on the top of the sedimentation box (702), a reeling shaft (805) is arranged between the mounting blocks (804), a reeling motor (806) is arranged on one of the mounting blocks (804), an output end of the reeling motor (806) is fixedly connected to the reeling shaft (805), the reeling shaft (805) and the pull ring (802) are connected via a cable (803), a moving block (807) is arranged on the inner wall of the sedimentation box (702), a moving assembly is arranged in the moving block (807), a connecting rod (815) is arranged on the moving assembly, and a push plate (816) is arranged on the connecting rod (815).

7. The quartz sand washing and drying equipment for fracturing according to claim 6, characterized in that: The moving assembly comprises a plurality of groups of pulleys (809), wherein the plurality of pulleys (809) are arranged in the moving block (807), the pulleys (809) are connected to each other via a transmission belt (810), a connecting block (811) is arranged on the transmission belt (810), the transmission belt (810) is connected to a connecting member (814) via the connecting block (811), a slider (813) is arranged on the connecting member (814), the slider (813) is slidably connected to a slide rail (812), a motor three (808) is arranged in the moving block (807), an output end of the motor three (808) is connected to one of the pulleys (809), and a connecting rod (815) is arranged on a side of the connecting member (814) away from the slide rail (812).

8. The quartz sand washing and drying equipment for fracturing according to claim 1, characterized in that: The dust collection mechanism (9) comprises a collection pipe (901), the collection pipe (901) being arranged on a circulation pipe (501) in the gas circulation mechanism (5), the collection pipe (901) being connected to a pipe cover (902) via a hinge, a retaining groove (903) being provided in the collection pipe (901), a retaining ring (904) being provided in the retaining groove (903), and a dust collection bag (905) being provided on the retaining ring (904).

9. The quartz sand washing and drying equipment for fracturing according to claim 1, characterized in that: A resistance heating wire (301) is arranged inside the drum dryer (3); a fixed platform (305) is arranged outside the drum dryer (3); a plurality of groups of rotating wheels (303) are arranged on the fixed platform (305); an output end of a motor 1 (304) is arranged on one of the rotating wheels (303); a rotating ring (302) is arranged on the outer wall of the drum dryer (3); the rotating ring (302) is slidably connected to the rotating wheel (303); a temperature sensor (10) is arranged on the inner wall of the drum dryer (3); the temperature sensor (10) transmits collected data to a central control system.

10. The quartz sand washing and drying equipment for fracturing according to claim 9, characterized in that: The central control system comprises: A collection module: used for transmitting the data collected by the temperature sensor (10) to a central control system; Analysis module: It analyzes the data collected in the central control system through the data processing unit; Driving module: it drives the resistance heating wire (301) through the analyzed information.

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