Recovery and recycling system for backwashing waste liquid of mine hydraulic support

Abstract

The application discloses a recycling system for backwashing waste liquid of a mine hydraulic support, which comprises a one-way valve, a pressure reducing valve and a filtering loop assembly, two pressure reducing valves are communicated with two ends of the filtering loop assembly respectively, and two one-way valves are communicated with the two pressure reducing valves one by one; the filtering loop assembly comprises a three-way valve, a primary filter, a secondary filter and a multi-head liquid outlet pipe, two liquid inlet ends of the multi-head liquid outlet pipe are communicated with liquid outlet ends of the two secondary filters through the three-way valve respectively, two liquid inlet ends of the two secondary filters are communicated with liquid outlet ends of the two primary filters respectively, and a liquid inlet end of the primary filter is communicated with a liquid outlet end of the pressure reducing valve through the three-way valve and a ball valve. The recycling system effectively solves the problems of waste of emulsion and water resources and environmental pollution, realizes functions such as simultaneous filtering of two paths, one-use one-backup, on-line replacement of filter elements and the like, the pressure reducing valve is adjustable for system pressure, and the pressure of the emulsion can reach the filtering pressure.

Description

Technical Field

[0001] This invention relates to the field of emulsion filtration equipment technology, and more specifically to a recycling system for backwashing waste liquid used in mining hydraulic supports. Background Technology

[0002] Automatic backwash filters are widely used in metallurgy, chemical industry, petroleum, papermaking, pharmaceutical, food, mining, power, and urban water supply. Applications include industrial wastewater and circulating water filtration, emulsion regeneration, waste oil filtration, continuous casting water systems and blast furnace water systems in the metallurgical industry, and high-pressure water descaling systems for hot rolling. It is an advanced, efficient, and easy-to-operate fully automatic filtration device. In coal mines, the automatic backwash filters installed on each hydraulic support perform timed (pressure-controlled) backwashing. The waste liquid generated during backwashing is directly discharged into the environment, causing waste of emulsion and water resources and environmental pollution. A mining hydraulic support backwash waste liquid recycling system can solve this problem. Summary of the Invention

[0003] The purpose of this invention is to provide a recycling system for backwashing waste liquid in mining hydraulic supports, so as to solve the problem of waste liquid generated by backwashing being directly discharged into the environment, causing waste of emulsion and water resources and environmental pollution.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A system for recycling and reusing backwash wastewater from mine hydraulic supports includes a check valve, a pressure reducing valve, and a filter circuit assembly. Two pressure reducing valves are respectively connected to both ends of the filter circuit assembly, and two check valves are each connected to one of the two pressure reducing valves.

[0006] The filtration circuit assembly includes a three-way valve, a primary filter, a secondary filter, and a multi-head outlet pipe. The two inlet ends of the multi-head outlet pipe are connected to the outlet ends of the two secondary filters respectively through the three-way valve. The two inlet ends of the two secondary filters are connected to the outlet ends of the two primary filters respectively. The inlet end of the primary filter is connected to the outlet end of the pressure reducing valve through the three-way valve and the ball valve.

[0007] A further technical solution is: the pressure reducing valve includes a housing, a valve, a valve core and a first spring, the valve is slidably installed in a groove in the inner cavity of the housing, and the valve core is pressed against the through hole of the valve by the first spring.

[0008] A further technical solution is as follows: the primary filter includes a first filter base, a first cylinder, a first top cover, a first filter element, a first visual differential pressure alarm, and a first pressure gauge. The first cylinder is mounted on the first filter base, and the first filter element is mounted in the first cylinder through the first top cover. The liquid inlet end of the first filter base is connected to the inner cavity of the first filter element, and the liquid outlet end of the first filter base is connected to the channel between the first filter element and the first cylinder. The first visual differential pressure alarm and the first pressure gauge are both mounted on the first top cover.

[0009] A further technical solution is: the first filter element includes an end cap, an inner skeleton, a middle skeleton, an outer skeleton, an inner filter layer, and an outer filter layer. The inner skeleton, the middle skeleton, and the outer skeleton are coaxially arranged and sealed at both ends by the end cap. The outer filter layer is filled between the outer skeleton and the middle skeleton, and the inner filter layer is filled between the middle skeleton and the inner skeleton.

[0010] A further technical solution is: the inner filter layer is arranged in a wavy pattern along the ring, and multiple evenly distributed magnetic strips are installed between the waves. The inner filter layer on both sides of the magnetic strips is clamped together by a seam strip.

[0011] A further technical solution is as follows: the secondary filter includes a second filter base, a second cylinder, a second top cover, a second filter element, a second visual differential pressure alarm, and a second pressure gauge. The second cylinder is installed on the second filter base, the second filter element is installed in the second cylinder through the second top cover, and the second visual differential pressure alarm and the second pressure gauge are both installed on the second top cover.

[0012] A further technical solution is that the second filter seat is provided with two inlet chambers and one outlet chamber, and a one-way component is provided in both the inlet chamber and the outlet chamber.

[0013] A further technical solution is: the one-way component includes a stud, a baffle, and a second spring. The stud is vertically installed in the inlet chamber and the outlet chamber. The baffle is slidably installed on the stud by the second spring. The baffle seals the inlet chamber and the outlet chamber by the pressure of the second spring.

[0014] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0015] This invention proposes a recycling system for backwashing wastewater from mine hydraulic supports. The wastewater enters the system via a check valve and is then depressurized to 3.5-4 MPa by a pressure reducing valve. It then enters a three-way ball valve, which splits the wastewater into two streams, each flowing into a primary filter. After passing through two stages of coarse filtration and magnetic filtration in the primary filter element, the wastewater enters a secondary filter. After further filtration in the secondary filter, the wastewater flows into a multi-ended outlet pipe. This system effectively solves the problems of emulsion and water waste and environmental pollution. Furthermore, it provides a comprehensive recycling system. The system can achieve simultaneous filtration of two channels, one in use and one in standby, and online filter replacement without stopping the system; 3. The pressure reducing valve is adjustable for system pressure and ensures that the emulsion will not enter the recycling system if the pressure value of the emulsion is too low; 4. The filter element structure of the primary filter: adopts two filter layers with magnets installed in the two filter layers. The two filter layers use filter media of different precision for step-by-step filtration, with a large dirt holding capacity. The magnets in the filter layers are used to filter out iron filings in the medium; 5. The inlet and outlet of the secondary filter are equipped with one-way opening and closing components to prevent media backflow. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the recycling and reuse system for backwashing waste liquid of mining hydraulic supports, which is based on the present invention.

[0017] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the filter loop assembly.

[0018] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of a medium-pressure reducing valve.

[0019] Figure 4 For the present invention Figure 1 A schematic diagram of the structure of the intermediate stage filter.

[0020] Figure 5 For the present invention Figure 4 A schematic diagram of the structure of the first filter element.

[0021] Figure 6 For the present invention Figure 5 A schematic diagram of the inner filter layer.

[0022] Figure 7 For the present invention Figure 1 A schematic diagram of the secondary filter.

[0023] Figure 8 For the present invention Figure 7 A structural diagram from another perspective.

[0024] Reference numerals: 1. Check valve; 2. Pressure reducing valve; 21. Housing; 22. Valve; 23. Valve core; 24. First spring; 3. Filter circuit assembly; 4. Three-way valve; 5. Primary filter; 51. First filter base; 52. First cylinder; 53. First top cover; 54. First filter element; 541. End cap; 542. Inner frame; 543. Middle frame; 544. Outer frame; 545. Inner filter layer; 546. Outer filter layer; 55. First mesh Visual differential pressure alarm; 56. First pressure gauge; 6. Secondary filter; 61. Second filter base; 611. Inlet chamber; 612. Outlet chamber; 62. Second cylinder; 63. Second top cover; 64. Second filter element; 65. Second visual differential pressure alarm; 66. Second pressure gauge; 7. Multi-head outlet pipe; 8. Ball valve; 9. Magnetic strip; 10. Seam strip; 11. One-way opening and closing assembly; 111. Stud; 112. Baffle; 113. Second spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Example 1:

[0032] This implementation example Figure 1 and Figure 2 As shown, the invention relates to a recycling system for backwashing waste liquid in mining hydraulic supports. The structure is as follows: it includes a one-way valve 1, a pressure reducing valve 2, and a filter circuit assembly 3. The outlets of the two pressure reducing valves 2 are respectively connected to the two inlet ends of the filter circuit assembly 3. The outlets of the two one-way valves 1 are respectively connected to the inlet ends of the two pressure reducing valves 2. The filter circuit assembly 3 includes a three-way valve 4, a primary filter 5, a secondary filter 6, and a multi-ended outlet pipe 7. The two inlet ends of the multi-ended outlet pipe 7 are respectively connected to the outlet ends of the two secondary filters 6 via the three-way valve 4. The two inlet ends of the two secondary filters 6 are respectively connected to the outlet ends of the two primary filters 5. The inlet end of the primary filter 5 is connected to the outlet end of the pressure reducing valve 2 via the three-way valve 4 and a ball valve 8.

[0033] The working process of this invention is as follows: External backwash waste liquid enters the recycling system through one-way valve 1. When the backwash waste liquid reaches pressure reducing valve 2, if the pressure of the backwash waste liquid is high enough to open pressure reducing valve 2 and there is enough pressure for filtration in filter circuit assembly 3, the backwash waste liquid is reduced to 3.5-4 MPa through pressure reducing valve 2 and then enters three-way valve 4, splitting into two paths, which enter two primary filters 5 respectively. After coarse filtration by primary filters 5, it enters secondary filters 6. After filtration by secondary filters 6, it flows into multi-head outlet pipe 7. This recycling system effectively solves the waste of emulsion and water resources and environmental pollution, and can realize functions such as simultaneous filtration of two paths, one in use and one in standby, and online replacement of filter elements without stopping the machine.

[0034] Example 2:

[0035] This implementation example Figure 3 As shown, the pressure reducing valve 2 includes a housing 21, a valve 22, a valve core 23, and a first spring 24. The valve 22 is slidably installed in a groove in the inner cavity of the housing 21, and the valve core 23 is pressed against the through hole of the valve 22 by the first spring 24.

[0036] When the backwash waste liquid pressure is insufficient, it cannot push the valve 22 and valve core 23 to move. When the backwash waste liquid pressure is greater than the elastic force of the first spring 24, it causes the valve 22 and valve core 23 to move together. At this time, the backwash waste liquid pressure is still insufficient to separate the valve 22 and valve core 23, and the backwash waste liquid cannot pass through. When the backwash waste liquid pressure continues to increase and reaches a certain threshold, the valve 22 will not move until it reaches the last position in the chute. The first spring 24 continues to contract, the valve 22 and valve core 23 separate, the backwash waste liquid passes through, and the pressure value decreases. The pressure reducing valve 2 is adjustable for system pressure and ensures that if the emulsion pressure value is too low, the emulsion will not enter the recycling system.

[0037] It is worth noting that the threshold is controlled by the elasticity of the first spring 24, and this threshold control is the minimum filtration pressure of the filter loop assembly 3.

[0038] Example 3:

[0039] This implementation example Figure 4 , Figure 5 and Figure 6As shown, the primary filter 5 includes a first filter base 51, a first cylinder 52, a first upper cover 53, a first filter element 54, a first visual differential pressure alarm 55, and a first pressure gauge 56. The first cylinder 52 is installed on the first filter base 51, and the first filter element 54 is installed inside the first cylinder 52 through the first upper cover 53. The liquid inlet end of the first filter base 51 is connected to the inner cavity of the first filter element 54, and the liquid outlet end of the first filter base 51 is connected to the channel between the first filter element 54 and the first cylinder 52. The first visual differential pressure alarm 55 and the first pressure gauge 56 are both installed on the first upper cover 53, and the inner ends of both are located in the inner cavity of the first filter element 54.

[0040] The first visual differential pressure alarm 55 can be made using a differential pressure switch and an alarm light. The differential pressure switch consists of two diaphragm chambers, each sealed by two sealing diaphragms and one differential pressure sensing diaphragm. Liquid from the high-pressure and low-pressure sections of the primary filter 5 enter the high-pressure and low-pressure chambers of the differential pressure switch, respectively. The sensed differential pressure causes the pressure-sensing diaphragm to deform, which, through a mechanical structure such as a lever spring, ultimately activates the microswitch at the top, outputting an electrical signal that illuminates the alarm light.

[0041] The first pressure gauge 56 displays the pressure value inside the first cylinder 52.

[0042] Preferably, the first filter element 54 includes an end cap 541, an inner frame 542, a middle frame 543, an outer frame 544, an inner filter layer 545, and an outer filter layer 546. The inner frame 542, the middle frame 543, and the outer frame 544 are coaxially arranged and sealed at both ends by the end cap 541. The outer filter layer 546 is filled between the outer frame 544 and the middle frame 543, and the inner filter layer 545 is filled between the middle frame 543 and the inner frame 542.

[0043] Preferably, the inner filter layer 545 is arranged in a wavy pattern along the ring, and multiple evenly distributed magnetic strips 9 are installed between the waves. The inner filter layer 545 on both sides of the magnetic strips 9 is clamped by the seam strip 10.

[0044] The first filter element 54 of the primary filter 5 has the following structure: it adopts two filter layers and adds magnets in the two filter layers. The two filter layers use filter media of different precision for step-by-step filtration. It has a large dirt holding capacity. The magnets in the filter layers are used to filter out iron filings in the medium to ensure the filtration quality of backwash waste liquid.

[0045] Example 4:

[0046] This implementation example Figure 7 and Figure 8As shown, the secondary filter 6 includes a second filter base 61, a second cylinder 62, a second upper cover 63, a second filter element 64, a second visual differential pressure alarm 65, and a second pressure gauge 66. The second cylinder 62 is mounted on the second filter base 61, and the second filter element 64 is mounted inside the second cylinder 62 through the second upper cover 63. The second visual differential pressure alarm 65 and the second pressure gauge 66 are both mounted on the second upper cover 63.

[0047] Note: The second visual differential pressure alarm 65 and the second pressure gauge 66 have the same structure as the first visual differential pressure alarm 55 and the first pressure gauge 56 in the above embodiment 3, and will not be described again.

[0048] Preferably, the second filter seat 61 is provided with two inlet chambers 611 and one outlet chamber 612, and a one-way component 11 is provided in both the inlet chamber 611 and the outlet chamber 612.

[0049] Preferably, the one-way component 11 includes a stud 111, a baffle 112, and a second spring 113. The stud 111 is vertically installed in the inlet chamber 511 and the outlet chamber 512. The baffle 112 is slidably installed on the stud 111 by the second spring 113. The baffle 112 seals the inlet chamber 511 and the outlet chamber 512 by the pressure of the second spring 113.

[0050] The inlet and outlet of the secondary filter 6 are equipped with one-way opening and closing components 11. When the liquid applies pressure to the baffle 112, it compresses the second spring 113. When the liquid pressure is less than the elastic force of the second spring 113, the baffle 112 closes the inlet and outlet channels of the secondary filter 6 to prevent the medium from flowing back.

[0051] Although the invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter arrangement within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A system for recycling and reusing backwashing wastewater from mine hydraulic supports, characterized in that: The system includes a one-way valve (1), a pressure reducing valve (2), and a filter loop assembly (3). The two pressure reducing valves (2) are respectively connected to both ends of the filter loop assembly (3), and the two one-way valves (1) are respectively connected to the two pressure reducing valves (2). The filter loop assembly (3) includes a three-way valve (4), a primary filter (5), a secondary filter (6), and a multi-head outlet pipe (7). The two inlet ends of the multi-head outlet pipe (7) are connected to the outlet ends of the two secondary filters (6) respectively via the three-way valve (4). The two inlet ends of the two secondary filters (6) are connected to the outlet ends of the two primary filters (5) respectively. The inlet end of the primary filter (5) is connected to the outlet end of the pressure reducing valve (2) via the three-way valve (4) and a ball valve (8). The primary filter (5) includes a first filter seat (51), a first cylinder (52), a first top cover (53), a first filter element (54), a first visual differential pressure alarm (55), and a first pressure gauge (56). The first cylinder (52) is mounted on the first filter seat (51), and the first filter element (54) is mounted inside the first cylinder (52) through the first top cover (53). The inlet end of the first filter seat (51) communicates with the inner cavity of the first filter element (54), and the outlet end of the first filter seat (51) communicates with the channel between the first filter element (54) and the first cylinder (52). The first visual differential pressure alarm (55) and the first pressure gauge (56) are both mounted on the first top cover (53). The first filter element (54) includes an end cap (541), an inner skeleton (542), a middle skeleton (543), an outer skeleton (544), an inner filter layer (545), and an outer filter layer (546). The inner skeleton (542), the middle skeleton (543), and the outer skeleton (544) are coaxially arranged and sealed at both ends by the end cap (541). The outer filter layer (546) fills between the outer skeleton (544) and the middle skeleton (543), and the inner filter layer (545) fills between the middle skeleton (543) and the inner skeleton (542). The inner filter layer (545) is arranged in a wavy pattern along the ring, and multiple evenly distributed magnetic strips (9) are installed between the waves. The inner filter layer (545) on both sides of the magnetic strips (9) is clamped by the seam strip (10). The pressure reducing valve (2) includes a housing (21), a valve (22), a valve core (23), and a first spring (24). The valve (22) is slidably installed in a groove in the inner cavity of the housing (21), and the valve core (23) is pressed against the through hole of the valve (22) by the first spring (24). The secondary filter (6) includes a second filter base (61), a second cylinder (62), a second top cover (63), a second filter element (64), a second visual differential pressure alarm (65), and a second pressure gauge (66). The second cylinder (62) is installed on the second filter base (61), and the second filter element (64) is installed inside the second cylinder (62) through the second top cover (63). The second visual differential pressure alarm (65) and the second pressure gauge (66) are both installed on the second top cover (63). The second filter seat (61) is provided with two inlet chambers (611) and one outlet chamber (612). Both the inlet chamber (611) and the outlet chamber (612) are provided with one-way opening and closing components (11). The one-way opening and closing assembly (11) includes a stud (111), a baffle (112), and a second spring (113). The stud (111) is vertically installed in the inlet chamber (611) and the outlet chamber (612). The baffle (112) is slidably installed on the stud (111) by the second spring (113). The baffle (112) seals the inlet chamber (611) and the outlet chamber (612) by the pressure of the second spring (113).

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