Resource utilization method of hydraulic support backwashing liquid

Abstract

The invention discloses a hydraulic support backwash liquid resource utilization method. The method comprises the following steps that S100, backwash liquid generated by an emulsion circulation loop and used for cleaning a hydraulic support flows through a backwash liquid pressure recovery device to be subjected to pressure storage for standby application; step S200, performing pressure storage on the backwashing liquid in the filtering circulation loop through the backwashing liquid pressure recovery device again for later use; step S300, carrying out solid-liquid classification recovery treatment on the filter residues passing through the backwashing liquid pressure recovery device; and the emulsified liquid circulation loop and the filtering circulation loop are connected with each other.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic support backwashing fluid treatment, and in particular to a method for resource utilization of hydraulic support backwashing fluid. Background Art

[0002] Improving the working stability of the hydraulic system of the support and effectively controlling the pollution of the system are important measures to ensure the production of the fully mechanized mining face. On the hydraulic support, the traditional direct filtering method, although low-cost, makes the removal, replacement and installation of the filter element extremely inconvenient due to the special working environment underground, which directly affects the service life and production efficiency of the equipment. Automatic backwash filter is a simple and effective filtering backwash filter.

[0003] The flushing equipment is small in size, highly automated, and easy to operate and manage. It does not require filter element replacement when blocked, and can automatically clean the filter screen of the hydraulic support in a short time.

[0004] The discharge of pollutants from the automatic backwash filter in the support hydraulic system relies on the flushing function of the emulsion in the system on the filter element to discharge the pollutants trapped on the surface of the filter element together with the emulsion to the working surface. Although the pollutants in the system are removed in this way, the discharged emulsion will cause serious pollution to the groundwater resources and environment. This is because the emulsions widely used at present are usually diluted with emulsified oil, emulsifiers, and additives in water. They are uniform and stable colloidal substances composed of water and oil; emulsions, synthetic liquids, and concentrated liquids are all indecomposable media. Direct discharge into the goaf may cause groundwater pollution and waste of emulsions on the one hand; on the other hand, it may flow to the underground water tank, and the water in the water tank is pumped to the well for treatment, resulting in an increase in COD. The original equipment cannot meet the treatment standards, and new treatment equipment must be added, thereby increasing the treatment cost.

[0005] The country is actively promoting environmental protection policies for mine water to achieve zero or near-zero emission standards. Therefore, the resource utilization of hydraulic support backwash fluid not only responds to current environmental protection policies, but also saves a lot of material costs for enterprises. This technology has important social and economic benefits. Summary of the invention

[0006] To this end, the present invention provides a method for resource utilization of hydraulic support backwashing fluid to solve the above-mentioned problems in the prior art. In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: According to the first aspect of the present invention, a method for resource utilization of hydraulic support backwashing fluid,

[0007] The following steps are involved:

[0008] Step S100, the backwashing liquid for cleaning the hydraulic support generated by the emulsion circulation loop flows through the backwashing liquid pressure recovery device for pressure storage for standby use;

[0009] Step S200, the backwashing liquid in the filtration circulation loop is passed through the backwashing liquid pressure recovery device again for pressure storage for standby use;

[0010] Step S300, the filter residue that has passed through the backwash liquid pressure recovery device is subjected to solid-liquid classification recovery treatment; the emulsion circulation loop and the filtration circulation loop are connected to each other.

[0011] Furthermore, the emulsion circulation circuit is a circuit composed of an emulsion tank, a scale inhibition device, an emulsion pump, a high-pressure backwash filter, a hydraulic support and a return liquid backwash filter connected in series in sequence, and the other output ends of the return liquid backwash filter and the high-pressure backwash filter are connected in parallel as input end pipelines of the backwash liquid recovery device.

[0012] Furthermore, the filtration circulation loop is a loop composed of a backwash liquid storage tank, a water inlet pump, a primary filter and a secondary filter connected in series in sequence. The other output of the primary and secondary filters is connected to the input end pipeline of the backwash liquid recovery device after being connected in parallel; the filter residue of the backwash liquid storage tank is processed by a low-temperature steam concentration device.

[0013] Furthermore, the backwashing liquid recovery device is composed of a hydraulic motor, a plunger pump and an accumulator; the backwashing liquid in a high-pressure state passes through the hydraulic motor and the plunger pump, and its pressure is recovered and converted into energy and stored in the accumulator for standby use.

[0014] Furthermore, the anti-scaling device is an alloy device synthesized from multiple metal materials, and performs anti-scaling through electrochemical action.

[0015] Furthermore, there are no less than backwash liquid recovery devices, which are connected in series.

[0016] Furthermore, the backwashing liquid storage tank is an open storage tank, which is connected to the hydraulic motor to receive the backwashing liquid passing through the backwashing liquid recovery device.

[0017] Furthermore, both the primary filter and the secondary filter are high-pressure backwash filters, and the filtering accuracy of the secondary filter is higher than that of the primary filter; the filtrate produced by the primary filter passes through the secondary filter and enters the emulsion tank for standby; the backwash liquid of the primary filter and the secondary filter is backwashed and produced water according to the pressure difference between the primary filter and the secondary filter.

[0018] Furthermore, a valve is provided at the other output end of the liquid return backwashing filter and the high-pressure backwashing filter.

[0019] Furthermore, the low-temperature steam concentration device achieves solid-liquid separation by vacuum distillation, and the filter residue treated by the low-temperature steam concentration device is placed in a filter residue storage box, and the liquid is placed in a distillate storage tank for standby use.

[0020] The present invention has the following advantages:

[0021] 1. Installing a GPRS device in the emulsion delivery pipeline can prevent scaling of the pipeline, thereby reducing the clogging of the filter element of the high-pressure backwash filter and the generation of more filter residue in the backwash liquid.

[0022] 2. The hydraulic support backwashing liquid residual pressure recovery device can recycle the backwashing pressure, and the residual pressure energy saving rate is about 30%.

[0023] 3. The recycling of backwashing liquid can save a lot of emulsion material costs and the cost of equipment modification required to treat the water in the water tank to meet the standards due to the increase of COD caused by the discharge of backwashing liquid into the water tank. On the other hand, it can achieve zero discharge of hydraulic support backwashing liquid and avoid pollution to the environment.

[0024] 4. The filter residue produced in the backwash liquid storage tank is treated by a low-temperature steam concentration device and then sent to a hazardous waste site for disposal without causing secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A process flow chart of a method for resource utilization of hydraulic support backwashing fluid provided in some embodiments of the present invention.

[0026] Figure 2 A system structure diagram of a method for resource utilization of hydraulic support backwashing fluid provided in some embodiments of the present invention.

[0027] Figure 3 A structural diagram of a device for resource utilization of hydraulic support backwashing fluid provided in some embodiments of the present invention.

[0028] In the figure, 1. emulsion tank, 2. scale inhibition device, 3. emulsion pump, 4. high-pressure backwash filter, 5. hydraulic support, 6. return liquid backwash filter, 7. valve, 8. hydraulic motor, 9. plunger pump, 10. accumulator, 11. backwash liquid storage tank, 12. water inlet pump, 13. primary filter, 14. secondary filter, 15. filter residue storage tank, 16. low-temperature steam concentration device, 17. distillate storage tank. DETAILED DESCRIPTION

[0029] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are 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.

[0030] Example 1

[0031] like Figures 1 to 3 As shown, a method for resource utilization of backwashing fluid of a hydraulic support in an embodiment of the first aspect of the present invention is as follows:

[0032] The following steps are involved:

[0033] Step S100, the backwashing liquid for cleaning the hydraulic support generated by the emulsion circulation loop flows through the backwashing liquid pressure recovery device for pressure storage for standby use;

[0034] Step S200, the backwashing liquid in the filtration circulation loop is passed through the backwashing liquid pressure recovery device again for pressure storage for standby use;

[0035] Step S300, the filter residue that has passed through the backwash liquid pressure recovery device is subjected to solid-liquid classification recovery treatment; the emulsion circulation loop and the filtration circulation loop are connected to each other.

[0036] The technical effect achieved by the above embodiment is: through a method for resource utilization of hydraulic support backwashing fluid in this embodiment, 1. Installing a GPRS device in the emulsion delivery pipeline can prevent pipeline scaling, thereby reducing the clogging of the high-pressure backwashing filter element and the generation of more filter residue in the backwashing fluid.

[0037] 2. The hydraulic support backwashing liquid residual pressure recovery device can recycle the backwashing pressure, and the residual pressure energy saving rate is about 30%.

[0038] 3. The recycling of backwashing liquid can save a lot of emulsion material costs and the cost of equipment modification required to treat the water in the water tank to meet the standards due to the increase of COD caused by the discharge of backwashing liquid into the water tank. On the other hand, it can achieve zero discharge of hydraulic support backwashing liquid and avoid pollution to the environment.

[0039] 4. The filter residue produced in the backwash liquid storage tank is treated by a low-temperature steam concentration device and then sent to a hazardous waste site for disposal without causing secondary pollution.

[0040] Example 2

[0041] like Figures 1 to 3As shown, a method for resource utilization of hydraulic support backwashing fluid includes all the contents of Example 1. In addition, the emulsion circulation circuit is a circuit composed of an emulsion tank 1, a scale inhibition device 2, an emulsion pump 3, a high-pressure backwashing filter 4, a hydraulic support 5 and a return liquid backwashing filter 6 connected in series in sequence, and the return liquid backwashing filter 6 and the other output end of the high-pressure backwashing filter 4 are connected in parallel as the input end pipeline of the backwashing liquid recovery device.

[0042] Optionally, the filtration circulation loop is a loop composed of a backwash liquid storage tank 11, a water inlet pump 12, a primary filter 13 and a secondary filter 14 connected in series in sequence, and the other outputs of the primary and secondary filters 13 and 14 are connected in parallel to the input end pipeline of the backwash liquid recovery device; the filter residue of the backwash liquid storage tank 11 is processed by a low-temperature steam concentration device 16.

[0043] Example 3

[0044] like Figures 1 to 3 As shown, a method for resource utilization of hydraulic support backwashing fluid includes all the contents of Example 2. In addition, the backwashing fluid recovery device is composed of a hydraulic motor 8, a plunger pump 9 and an accumulator 10; the backwashing fluid in a high-pressure state passes through the hydraulic motor 8 and the plunger pump 9, and its pressure is recovered and converted into energy and stored in the accumulator 10 for standby use.

[0045] Optionally, the anti-scaling device 2 is an alloy device synthesized from multiple metal materials, and performs anti-scaling through electrochemical action.

[0046] Optionally, there is at least one backwash liquid recovery device connected in series.

[0047] Example 4

[0048] like Figures 1 to 3 As shown, a method for resource utilization of backwashing fluid of a hydraulic support includes all the contents of Example 3. In addition, the backwashing fluid storage tank 11 is an open storage tank, which is connected to the hydraulic motor 8 to receive the backwashing fluid that passes through the backwashing fluid recovery device.

[0049] Optionally, both the primary filter 13 and the secondary filter 14 are high-pressure backwash filters 4, and the filtering accuracy of the secondary filter 14 is higher than that of the primary filter 13; the filtrate produced by the primary filter 13 passes through the secondary filter 14 and enters the emulsion tank 1 for standby; the backwash liquid of the primary filter 13 and the secondary filter 14 is backwashed and produced water according to the pressure difference between the primary filter 13 and the secondary filter 14.

[0050] Optionally, a valve 7 is provided at the other output end of the liquid return backwash filter 6 and the high-pressure backwash filter 4 .

[0051] Optionally, a valve 7 is provided at the other output end of the liquid return backwash filter 6 and the high-pressure backwash filter 4 .

[0052] Example 5

[0053] like Figures 1 to 3 As shown, a method for resource utilization of hydraulic support backwashing fluid includes all the contents of Example 4. In addition, a low-temperature steam concentration device 16 achieves solid-liquid separation by a reduced pressure distillation method, and the filter residue treated by the low-temperature steam concentration device 16 is placed in a filter residue storage box 15, and the liquid is placed in a distillate storage tank 17 for storage and standby.

[0054] Example 6

[0055] The hydraulic support needs an emulsion pump station to provide emulsion. If it runs for a long time, the emulsion delivery pipeline will be scaled and the emulsion filter will be blocked. In order to ensure the filtering effect of the filter, the filter needs to be backwashed. The backwashing liquid is directly discharged into the goaf, which causes pollution to the underground water tank and the environment. The method of the present invention is used to recycle the backwashing liquid discharged to the outside, reducing the treatment cost and environmental pollution of underground wastewater. The treatment process is shown in the attached figure. Figure 3 As shown. Mainly include:

[0056] (1) Emulsion supply and return module

[0057] The emulsion delivery pipeline between the emulsion tank 1 and the emulsion pump station 3 is equipped with a scale prevention device 2, i.e., a GPRS device, which can prevent scale in the emulsion delivery pipeline and reduce the fouling of the high-pressure backwash filter 4 caused by scaling. The emulsion is delivered to the hydraulic support 5 through the emulsion pump station 3 and the high-pressure backwash filter station 4, and the return liquid of the hydraulic support 5 is returned to the emulsion tank 1 through the return liquid backwash filter 6. During the operation of the hydraulic support 5, the high-pressure backwash filter 4 and the return liquid backwash filter 6 are backwashed regularly, and the backwashing liquid enters the residual pressure recovery device.

[0058] (2) Backwash liquid residual pressure recovery

[0059] The backwashing liquid produced by the high-pressure backwashing filter 4 and the return liquid backwashing filter 6 passes through a hydraulic motor 8, and the hydraulic motor 8 is connected to a plunger pump 9, and the pressure of the backwashing liquid is converted and stored in an accumulator 10, which can be provided to the emulsion pump 3 for use, and the backwashing liquid at normal pressure enters a backwashing liquid storage tank 11.

[0060] (3) Backwashing fluid recovery and treatment

[0061] The backwashing liquid storage tank 11 is used in both standby and standby mode. The backwashing liquid in the backwashing liquid storage tank 11 enters the primary filter 13 for coarse filtration under the action of the water inlet pump 12. The filtration accuracy of the primary filter 13 is 60μm. The filtrate of the backwashing liquid after passing through the primary filter 13 is then finely filtered through the secondary filter 14. The filtration accuracy of the secondary filter 14 is 25μm. The filtrate produced by the secondary filter 14 returns to the emulsion tank 1. The backwashing liquid produced by the primary filter 13 and the secondary filter 14 is first recovered by the hydraulic motor 8 and the plunger pump 9 to the accumulator 10 for use, and the backwashing liquid is then returned to the backwashing liquid storage tank 11 for processing.

[0062] (4) Backwashing liquid tank residue treatment

[0063] The residue concentrate at the bottom of the backwash liquid storage tank 11 is cleaned regularly, and the backwash liquid storage tank 11 needs to be transported to the low-temperature steam concentration device 16 for treatment. The backwash liquid storage tank 11 is used for standby operation; the residue treated by the low-temperature steam concentration device 16 is placed in the residue storage tank 15, and the liquid is placed in the distillate storage tank 17 for storage.

[0064] Through the above hydraulic support backwashing liquid recycling process, the backwashing liquid residual pressure energy saving rate is about 30%. The backwashing liquid recycling and reuse saves a lot of emulsion costs every year and avoids environmental pollution caused by external discharge, which has good social and economic benefits.

[0065] In the description of the present invention, it is to be understood that the terms “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0069] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0070] In the description of this specification, the description with reference to the terms "embodiment one", "embodiment two", "example", "specific example", or "some examples" means that the specific method, device or feature described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, methods, devices or features described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for resource utilization of hydraulic support backwashing fluid, characterized in that: The following steps are involved: Step S100, the backwashing liquid for cleaning the hydraulic support generated by the emulsion circulation loop flows through the backwashing liquid pressure recovery device for pressure storage for standby use; Step S200, the backwashing liquid in the filtration circulation loop is passed through the backwashing liquid pressure recovery device again for pressure storage for standby use; Step S300, the filter residue that has passed through the backwash liquid pressure recovery device is subjected to solid-liquid classification recovery treatment; the emulsion circulation loop and the filtration circulation loop are connected to each other.

2. The method for resource utilization of hydraulic support backwashing fluid according to claim 1 is characterized in that: The emulsion circulation loop is a loop formed by sequentially connecting an emulsion tank (1), a scale prevention device (2), an emulsion pump (3), a high-pressure backwashing filter (4), a hydraulic support (5) and a return liquid backwashing filter (6). The return liquid backwashing filter (6) and the other output end of the high-pressure backwashing filter (4) are connected in parallel as an input end pipeline of a backwashing liquid recovery device.

3. The method for resource utilization of hydraulic support backwashing fluid according to claim 2 is characterized in that: The filtration circulation loop is a loop composed of a backwash liquid storage tank (11), a water inlet pump (12), a primary filter (13) and a secondary filter (14) connected in series in sequence; the other outputs of the primary and secondary filters (13, 14) are connected in parallel to the input end pipeline of the backwash liquid recovery device; and the filter residue of the backwash liquid storage tank (11) is processed by a low-temperature steam concentration device (16).

4. The method for resource utilization of hydraulic support backwashing fluid according to claim 3 is characterized in that: The backwashing liquid recovery device is composed of a hydraulic motor (8), a plunger pump (9) and an accumulator (10); the backwashing liquid in a high-pressure state passes through the hydraulic motor (8) and the plunger pump (9), and its pressure is recovered and converted into energy to be stored in the accumulator (10) for standby use.

5. The method for resource utilization of hydraulic support backwashing fluid according to claim 2 is characterized in that: The anti-scaling device (2) is an alloy device synthesized from multiple metal materials and performs anti-scaling through electrochemical action.

6. The method for resource utilization of hydraulic support backwashing fluid according to claim 1, characterized in that: There shall be no less than one backwash liquid recovery device, which shall be connected in series.

7. The method for resource utilization of hydraulic support backwashing fluid according to claim 4 is characterized in that: The backwashing liquid storage tank (11) is an open storage tank, which is connected to the hydraulic motor (8) to receive the backwashing liquid that passes through the backwashing liquid recovery device.

8. The method for resource utilization of hydraulic support backwashing fluid according to claim 7 is characterized in that: The primary filter (13) and the secondary filter (14) are both high-pressure backwash filters (4), and the filtering accuracy of the secondary filter (14) is higher than that of the primary filter (13); the filtrate produced by the primary filter (13) passes through the secondary filter (14) and enters the emulsion tank (1) for standby; the backwash liquid of the primary filter (13) and the secondary filter (14) is backwashed and produced according to the pressure difference between the primary filter (13) and the secondary filter (14).

9. The method for resource utilization of hydraulic support backwashing fluid according to claim 2, characterized in that: The other output ends of the liquid return backwashing filter (6) and the high-pressure backwashing filter (4) are provided with valves (7).

10. The method for resource utilization of hydraulic support backwashing fluid according to claim 1, characterized in that: The low-temperature steam concentration device (16) achieves solid-liquid separation by means of reduced pressure distillation. The filter residue treated by the low-temperature steam concentration device (16) is placed in a filter residue storage box (15), and the liquid is placed in a distillate storage tank (17) for storage and use.

Images