Solid-liquid separation and recovery equipment for hydraulic fracturing process of coal mine

Abstract

The utility model discloses solid-liquid separation and recovery equipment in a coal mine hydraulic fracturing process. The solid-liquid separation and recovery equipment comprises a base, a box body, a vibration motor, a screen and a transmission device, wherein moving rollers are arranged at the lower part of the base, so that the whole equipment can be conveniently moved to a required position; a screening bin and a water storage bin are arranged in the box body, when solid-liquid mixed fracturing wastewater enters the screening bin, the vibration motor can drive the screen to vibrate to screen the solid-liquid mixed fracturing wastewater entering the screening bin, liquid enters the water storage bin through the screen, and solids move to the conveying device in the inclined direction of the screen under the influence of vibration and gravity; and finally, the solid is discharged through the slag outlet by the transmission device, so that solid-liquid separation can be directly carried out at each hydraulic fracturing position, the carrying frequency and the carrying workload are effectively reduced, the working efficiency of hydraulic fracturing is effectively ensured, and the separated solid and liquid can be subsequently recycled in time.

Description

Technical Field

[0001] The utility model relates to solid-liquid separation and recovery equipment in a coal mine hydraulic fracturing process, belonging to the technical field of coalbed methane mining. Background Art

[0002] As global energy demand continues to grow, the development and utilization of unconventional natural gas resources such as coalbed methane has become an important way to solve energy supply problems. Hydraulic fracturing technology is widely used as an efficient means of mining. Hydraulic fracturing technology injects high-pressure water and chemical additives into coal seams to create cracks in coal seam rocks, thereby increasing gas flow channels and improving gas production and mining efficiency. However, a large amount of water and chemical additives in the hydraulic fracturing process will not only lead to a waste of groundwater resources, but also cause groundwater and surface water pollution, which will have a serious impact on the ecological environment. Therefore, it is necessary to recycle the wastewater generated by fracturing. However, the wastewater also carries a certain amount of coal slag, which can have other utilization values, and the wastewater can be reused after purification. Therefore, it is necessary to separate the recovered wastewater into solid and liquid. The existing solid-liquid separation equipment is difficult to transport due to its huge size. At present, it is set at a fixed position. Then, the wastewater carrying coal powder generated at different hydraulic fracturing positions is first collected in a container and then manually transported to the solid-liquid separation equipment for unified separation treatment. After completion, the wastewater and coal slag are collected separately and need to be transported to different locations. This method not only requires more frequent transportation and a longer transportation distance, but also affects work efficiency and increases workload.

[0003] Therefore, how to provide a new solid-liquid separation and recovery equipment that can directly perform solid-liquid separation at each hydraulic fracturing location, effectively reduce the number of transportation times and transportation workload, not only effectively ensure the working efficiency of hydraulic fracturing, but also enable timely subsequent reuse of the separated solid and liquid, is the problem that the utility model needs to solve. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a solid-liquid separation and recovery equipment for the hydraulic fracturing process of coal mines, so that solid-liquid separation can be directly performed at each hydraulic fracturing location, effectively reducing the number of transportation times and transportation workload, not only effectively ensuring the working efficiency of hydraulic fracturing, but also enabling timely subsequent reuse of the separated solids and liquids.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a solid-liquid separation and recovery device for hydraulic fracturing process in coal mines, comprising a base, a box, a vibrating motor, a screen and a transmission device;

[0006] The box is fixed to the upper part of the base, and a plurality of movable rollers are arranged at the lower part of the base for moving the base;

[0007] The vibration motor is installed on the upper part of the box body, and a slag inlet is provided on the upper part of the box body for injecting solid-liquid mixed fracturing wastewater into the box body. The screen is tiltedly arranged in the box body, and the higher end of the screen is below the slag inlet; the transmission device is horizontally installed at the bottom of the box body, and the lower end of the screen is above one end of the transmission device. The transmission spring of the vibration motor extends into the box body and is connected to the screen for vibrating the screen; the screen and the transmission device divide the interior of the box body into a screening bin and a water storage bin, and the screening bin is above the water storage bin; a slag outlet and a drain outlet are provided at the bottom of the box body, wherein the slag outlet is below the other end of the transmission device, and the drain outlet is connected to the water storage bin;

[0008] When the vibration motor is started, it can drive the screen to vibrate and screen the incoming solid-liquid mixed fracturing wastewater. The liquid passes through the screen into the water storage tank, and the solid is affected by vibration and gravity and moves along the inclination direction of the screen to the transmission device. Finally, the transmission device discharges the solid through the slag outlet.

[0009] Furthermore, the movable roller is a universal wheel, and the universal wheel is equipped with a locking mechanism for controlling the universal wheel to roll or stop. The universal wheel is used to facilitate the movement of the entire device, and the locking mechanism is used to position the device after reaching a specified position.

[0010] Furthermore, the transmission device is a waterproof belt conveyor. The waterproof belt conveyor is adopted because it has a waterproof function, operates stably in a water environment, and is easy to deploy.

[0011] Furthermore, the vibration motor is an explosion-proof vibration motor, and the aperture of the screen is 4 mm. The use of these two specific parameters can ensure the screening effect during solid-liquid separation.

[0012] Furthermore, the drain port is provided with a sealing plug for controlling the drain port to be opened or closed. If the wastewater discharged by hydraulic fracturing at a certain place is small, the drain port is blocked by the sealing plug, so that the separated wastewater can be retained in the water storage tank for easy recovery.

[0013] Compared with the prior art, the utility model adopts a combination of a base, a box, a vibration motor, a screen and a transmission device, which has the following advantages:

[0014] 1. The lower part of the base of the utility model is equipped with moving rollers, which is convenient for moving the entire equipment to the desired position; a screening bin and a water storage bin are arranged in the box body. When the solid-liquid mixed fracturing wastewater enters the screening bin, the vibration motor can drive the screen to vibrate and screen the solid-liquid mixed fracturing wastewater entering, wherein the liquid passes through the screen and enters the water storage bin, and the solid is affected by vibration and gravity and moves along the inclination direction of the screen to the transmission device, and finally the transmission device discharges the solid through the slag outlet, thereby realizing direct solid-liquid separation at each hydraulic fracturing position, effectively reducing the number of transportations and the workload of transportation, not only effectively ensuring the working efficiency of hydraulic fracturing, but also enabling the subsequent reuse of the separated solid and liquid in a timely manner.

[0015] 2. The utility model adds a sealing plug to the drain outlet, which can seal the drain outlet according to the amount of fracturing waste water discharged from each hydraulic fracturing position. When the amount of separated fracturing waste water is small, the fracturing waste water is directly recovered in the water storage tank; no additional recovery container is required, which effectively reduces the recovery steps; when the amount of separated fracturing waste water is large, part of the separated fracturing waste water is first stored in the water storage tank for buffering, and then the sealing plug is opened in time, and the drain pipe is connected to the drain outlet to discharge and collect the fracturing waste water in the water storage tank; different fracturing waste water recovery methods can be adopted according to different situations, effectively ensuring the working efficiency of wastewater recovery in different situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective view of the overall structure of the utility model;

[0017] Figure 2 yes Figure 1 Top view rotated 90°.

[0018] In the figure: 1-slag inlet, 2-vibration motor, 3-screen, 4-screening bin, 5-water storage bin, 6-transmission device, 7-slag outlet, 8-drainage outlet, 9-moving roller. DETAILED DESCRIPTION

[0019] The utility model will be further described below.

[0020] like Figure 1 and 2 As shown, the utility model includes a base, a box, a vibration motor 2, a screen 3 and a transmission device 6;

[0021] The box is fixed to the upper part of the base, and a plurality of movable rollers 9 are installed at the lower part of the base for moving the base;

[0022] The vibration motor 2 is installed on the upper part of the box body, and a slag inlet 1 is provided on the upper part of the box body for injecting solid-liquid mixed fracturing wastewater into the box body. The screen 3 is tiltedly arranged in the box body, and the higher end of the screen 3 is below the slag inlet 1; the transmission device 6 is horizontally installed at the bottom of the box body, and the lower end of the screen 3 is above one end of the transmission device 6. The transmission spring of the vibration motor 2 extends into the box body and is connected to the screen 3 for vibrating the screen 3; the screen 3 and the transmission device 6 divide the inside of the box body into a screening bin 4 and a water storage bin 5, and the screening bin 4 is above the water storage bin 5; the bottom of the box body is provided with a slag outlet 7 and a drain outlet 8, wherein the slag outlet 7 is below the other end of the transmission device 6, and the drain outlet 8 is connected to the water storage bin 5; the transmission device 6 is a waterproof belt conveyor. The waterproof belt conveyor is adopted because it has a waterproof function, operates stably in a water environment, and is easy to lay; the vibration motor 2 is an explosion-proof vibration motor, and the aperture of the screen 3 is 4mm. The use of these two specific parameters can ensure the screening effect during solid-liquid separation.

[0023] When the vibration motor 2 is started, it can drive the screen 3 to vibrate and screen the incoming solid-liquid mixed fracturing wastewater, wherein the liquid passes through the screen 3 into the water storage tank 5, and the solid is affected by the vibration and gravity and moves along the inclined direction of the screen 3 to the transmission device 6, and finally the transmission device 6 discharges the solid through the slag outlet 7.

[0024] As an improvement of the utility model, the movable roller 9 is a universal wheel, and the universal wheel is equipped with a locking mechanism for controlling the universal wheel to roll or stop. The universal wheel is used to facilitate the movement of the entire device, and the locking mechanism is used to position the device after reaching the specified position.

[0025] As another improvement of the present invention, the drain port 8 is provided with a sealing plug for controlling the opening or closing of the drain port 8. If the wastewater discharged by hydraulic fracturing at a certain place is small, the drain port 8 is blocked by the sealing plug, so that the separated wastewater can be retained in the water storage tank 5 for easy recovery.

[0026] The vibration motor 2, transmission device 6 and locking mechanism are all existing equipment or components and can be directly purchased on the market.

[0027] First, the utility model is pushed to the vicinity of the desired hydraulic fracturing position by the moving roller 9, and then the drainage port 8 is blocked by a sealing plug to complete the initial layout work; during the hydraulic fracturing process, solid-liquid mixed fracturing wastewater (i.e., fracturing fluid carrying coal slag) will be continuously collected from the fracturing hole, and the solid-liquid mixed fracturing wastewater will be transported to the screening bin 4 through the slag inlet 1 and fall on the screen 3. At this time, the vibration motor 2 is turned on, and the vibration motor 2 drives the screen 3 to vibrate through the transmission spring. The vibration of the screen 3 can drive the solid-liquid mixed fracturing fluid on its upper part to vibrate and screen, wherein the liquid enters the water storage bin 4 through the holes of the screen 3, and the coal slag remains on the screen 3 and is affected by the vibration and gravity and moves along the inclination direction of the screen 3 to the transmission device 6 for accumulation, and then the transmission device 6 is started to make the accumulation on the transmission device 6 The coal slag on the top is transported to the slag outlet 7 for discharge and collection, completing the solid-liquid separation and the recovery of the solid part; the liquid part is based on the hydraulic fracturing situation at that position. If the amount of fracturing waste water after separation is less than the capacity of the water storage bin 5, the fracturing waste water recovery work is completed directly in the water storage bin 5; if the amount of fracturing waste water after separation is greater than the capacity of the water storage bin 5, the sealing plug will be opened in time, and the drain pipe will be connected to the drain outlet 8 to discharge and collect the fracturing waste water in the water storage bin 5. After completion, the utility model can be driven to the next hydraulic fracturing position to continue the solid-liquid separation and recovery work; finally, the solid-liquid separation is directly performed at each hydraulic fracturing position, which effectively reduces the number of transportations and the workload of transportation, not only effectively guarantees the working efficiency of hydraulic fracturing, but also can promptly reuse the separated solid and liquid.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A solid-liquid separation and recovery device for hydraulic fracturing process in coal mines, characterized in that: It includes a base, a box, a vibration motor, a screen and a transmission device; The box is fixed to the upper part of the base, and a plurality of movable rollers are arranged at the lower part of the base for moving the base; The vibration motor is installed on the upper part of the box body, and a slag inlet is provided on the upper part of the box body for injecting solid-liquid mixed fracturing wastewater into the box body. The screen is tiltedly arranged in the box body, and the higher end of the screen is below the slag inlet; the transmission device is horizontally installed at the bottom of the box body, and the lower end of the screen is above one end of the transmission device. The transmission spring of the vibration motor extends into the box body and is connected to the screen for vibrating the screen; the screen and the transmission device divide the interior of the box body into a screening bin and a water storage bin, and the screening bin is above the water storage bin; a slag outlet and a drain outlet are provided at the bottom of the box body, wherein the slag outlet is below the other end of the transmission device, and the drain outlet is connected to the water storage bin; When the vibration motor is started, it can drive the screen to vibrate and screen the incoming solid-liquid mixed fracturing wastewater. The liquid passes through the screen into the water storage tank, and the solid is affected by vibration and gravity and moves along the inclination direction of the screen to the transmission device. Finally, the transmission device discharges the solid through the slag outlet.

2. The solid-liquid separation and recovery equipment for coal mine hydraulic fracturing process according to claim 1, characterized in that: The movable roller is a universal wheel, and a locking mechanism is installed on the universal wheel to control the rolling or stopping of the universal wheel.

3. The solid-liquid separation and recovery equipment for coal mine hydraulic fracturing process according to claim 1, characterized in that: The transmission device is a waterproof belt conveyor.

4. The solid-liquid separation and recovery equipment for coal mine hydraulic fracturing process according to claim 1, characterized in that: The vibration motor is an explosion-proof vibration motor, and the aperture of the screen is 4 mm.

5. The solid-liquid separation and recovery equipment for coal mine hydraulic fracturing process according to claim 1, characterized in that: The drain outlet is provided with a sealing plug for controlling the drain outlet to be opened or closed.

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