Evaluation device and evaluation method for flocculation effect of flocculant

Abstract

The present invention provides an evaluation device and method for the flocculation effect of a flocculant, the evaluation device comprising: a supply component for a liquid to be flocculated, a flocculant supply component, a flocculation reaction component and a filtering component; the supply component for the liquid to be flocculated and the flocculant supply component are connected to the feed port of the flocculation reaction component through a multi-way valve, so that the liquid to be flocculated and the flocculant undergo a flocculation reaction in the flocculation reaction component and generate flocculated precipitates; the discharge port of the flocculation reaction component is connected to the feed port of the filtering component, and the filtering component comprises a plurality of filter elements connected end to end; each filter element is provided with filter elements with different pore sizes, and the pore size of the filter elements in the filter element gradually decreases from the side close to the feed port of the filtering component to the side close to the discharge port of the filtering component, so that the flocculated precipitates complete multi-stage filtration in the filtering component. The present invention can comprehensively evaluate the flocculation effect of the flocculant in different filter media.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas acquisition engineering, and in particular to an evaluation device and method for the flocculation effect of a flocculant. Background Art

[0002] Flocculation refers to the aggregation of suspended particles in liquid, or the formation of flocs, which accelerates the aggregation of particles and achieves the purpose of solid-liquid separation. Flocculants are positively (negatively) charged groups that react with negatively (positively) charged and difficult-to-separate particles or particles in a liquid environment, reduce their potential, make them unstable, and use the polymerization properties to concentrate these particles and separate them by physical or chemical methods.

[0003] At present, flocculants can be generally divided into two categories according to their chemical composition: inorganic flocculants and organic flocculants. Among them, inorganic flocculants include inorganic coagulants and inorganic polymer flocculants; organic flocculants include synthetic organic polymer flocculants, natural organic polymer flocculants and microbial flocculants. Flocculants are mainly used in the fields of water supply and sewage treatment. At present, there are mainly the following methods to evaluate the flocculation effect of flocculants: the first is to refer to the enterprise standard of PetroChina: Q / SY 90-2012 Technical Specifications for Flocculants for Oilfield Water Treatment, and evaluate the flocculation effect of the flocculant by calculating the reduction rate of the absorbance of the suspension before and after adding the flocculant. The second is to refer to the petroleum and natural gas industry standard: SY / T 5329-2012 Water Quality Indicators and Analysis Methods for Water Injection in Clastic Reservoirs, compare the suspended solids content of blank samples and samples after adding flocculants, and calculate the suspended solids removal rate to evaluate the flocculation effect of the flocculant. The national invention patent with application number CN201610298417.X proposes a method that can simultaneously detect changes in suspended solids and oil content in water samples before and after flocculant treatment.

[0004] However, the above-mentioned detection methods are essentially the same and can only evaluate the flocculation effect of the flocculant in a single pore size system, but cannot evaluate the flocculation effect of the flocculant in filter media of different sizes. Summary of the invention

[0005] In order to solve at least one of the problems mentioned in the background technology, the present invention provides a device and method for evaluating the flocculation effect of a flocculant, which can comprehensively evaluate the flocculation effect of a flocculant in different filter media.

[0006] In order to achieve the above object, on the one hand, the present invention provides a device for evaluating the flocculation effect of a flocculant, comprising:

[0007] A flocculation liquid supply component, a flocculant supply component, a flocculation reaction component and a filtration component.

[0008] The flocculated liquid supply component and the flocculant supply component are connected to the feed port of the flocculation reaction component through a multi-way valve, so that the flocculated liquid and the flocculant undergo flocculation reaction in the flocculation reaction component and generate flocculated precipitates.

[0009] The material outlet of the flocculation reaction component is communicated with the material inlet of the filtering component, and the filtering component includes a plurality of filtering elements connected end to end.

[0010] Each filter element is provided with filter elements with different pore sizes, and the pore sizes of the filter elements in the filter element gradually decrease from the side close to the feed inlet of the filter component to the side close to the discharge port of the filter component, so that the flocculated sediment can complete multi-stage filtration in the filter component.

[0011] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, the filter element further includes a cylindrical shell, and the filter element is arranged in the inner cavity of the shell.

[0012] A first opening is provided at one end of the shell, and a second opening is provided at the other end of the shell. Both the first opening and the second opening are connected to the inner cavity of the shell. The liquid formed by the flocculated liquid and the flocculant flows from the first opening to the second opening in the shell.

[0013] The first opening is a feed port of the filter assembly, or the first opening is connected to a second opening of an adjacent filter assembly.

[0014] The second opening is a discharge port of the filter assembly, or the second opening is connected to the first opening of an adjacent filter assembly.

[0015] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, the filter element further includes a limiting element.

[0016] The limiting member is arranged on the inner cavity of the shell, and the limiting member comprises a limiting groove, and the filter element is arranged in the limiting groove to limit the filter element from moving in the inner cavity of the shell along the liquid flow direction.

[0017] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, the filter element is arranged on a side close to the second opening of the filter element, and the filter surface of the filter element is perpendicular to the liquid flow direction in the inner cavity of the shell.

[0018] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, the limiting member is at least one protrusion arranged on the inner wall of the shell, one end of the protrusion abuts against the inner side wall on the side close to the first opening of the filter element, and the other end of the protrusion extends toward the inner side wall on the side close to the second opening of the filter element, and forms a limiting groove with the inner side wall on the side close to the second opening.

[0019] Part of the filter element is clamped in the limiting groove, and one of the filter surfaces of the filter element is attached to the inner side wall close to the second opening.

[0020] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, the limiting member includes a plurality of protrusions, the extension lengths of the plurality of protrusions are the same, and the plurality of protrusions are circumferentially arranged on the inner wall of the shell along the radial direction of the shell.

[0021] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, a first valve body for controlling the opening or closing of the first opening is provided on the first opening.

[0022] The second opening is provided with a second valve body for controlling the opening or closing of the second opening.

[0023] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, the flocculation reaction component includes a reaction chamber, and a reaction cavity is provided in the reaction chamber.

[0024] A piston is arranged in the reaction chamber, which divides the reaction chamber into a first chamber and a second chamber which are not connected to each other. The first chamber is connected to a flocculated liquid supply component and a flocculant supply component, and is used for flocculation reaction between the flocculated liquid and the flocculant. The second chamber is connected to the output end of the driving pump.

[0025] The driving pump is used to push the piston to move toward the first chamber, so as to drive the liquid to be flocculated and the flocculant that undergo flocculation reaction in the first chamber to enter the filter assembly.

[0026] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, the device for evaluating the flocculation effect of a flocculant further comprises a waste liquid recovery device, which is connected to the discharge port of the filter component and is used to store liquid that has undergone multiple filtrations.

[0027] In the above-mentioned device for evaluating the flocculation effect of a flocculant, optionally, the filter element of the device for evaluating the flocculation effect of a flocculant includes one or more of a filter membrane, a filter cotton and a filter net.

[0028] On the other hand, the present invention also provides a method for evaluating the flocculation effect of a flocculant, the evaluation method adopts the above-mentioned device for evaluating the flocculation effect of a flocculant, and the evaluation method comprises the following steps:

[0029] The liquid to be flocculated and the flocculant are added into the reaction chamber of the flocculation reaction component to make the liquid to be flocculated and the flocculant undergo a flocculation reaction.

[0030] The driving pump of the flocculation reaction component is started to allow the flocculated liquid and flocculant to enter the filter component and pass through the multi-stage filtration of multiple filter elements in the filter component. After the filtration is completed, the filter elements in the multiple filter elements are cleaned and dried.

[0031] The mass of the filter elements in the plurality of filter elements before filtration, the mass of the filter elements in the plurality of filter elements after filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant are obtained.

[0032] The content of flocculated sediment is determined according to the mass of filter elements in the plurality of filter elements before filtration, the mass of filter elements in the plurality of filter elements after filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant.

[0033] In the above-mentioned method for evaluating the flocculation effect of the flocculant, optionally, the content of the flocculated precipitate is determined according to the mass of the filter elements in the plurality of filter elements before filtration, the mass of the filter elements in the plurality of filter elements after filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant, specifically including:

[0034] According to the formula

[0035]

[0036] Determine the content of flocculated sediment;

[0037] Among them, C x Indicates the content of flocculation sediment, the unit is mg / L; m' x Indicates the mass of the filter element before filtration, in mg; m x It represents the mass of the filter element after filtration, in mg; V represents the volume of the mixed liquid of the liquid to be flocculated and the flocculant passing through the filter component, in L.

[0038] The present invention provides an evaluation device and method for the flocculation effect of a flocculant. The evaluation device is provided with a flocculation reaction component for mixing a liquid to be flocculated with a flocculant to undergo a flocculation reaction and generate a flocculated precipitate, and a driving pump is used to pump the mixed liquid that has undergone a flocculation reaction into a filter component. By providing a plurality of filter elements connected to each other at the end in the filter component, the mixed liquid is allowed to pass through a plurality of filter elements in sequence to complete multi-stage filtration. By providing the pore size of the filter element in the filter element to gradually decrease from the side close to the feed inlet of the filter component to the side close to the discharge outlet of the filter component, the flocculation effect of the flocculant in filter media with different pore sizes can be analyzed. By providing a limiter for limiting the movement of the filter element in the filter element, the filter element is prevented from shifting during the filtration process, thereby improving the filtration effect. Therefore, the present invention can comprehensively evaluate the flocculation effect of the flocculant in different filter media.

[0039] The construction of the present invention and other objects and advantageous effects thereof will become more apparent through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of the structure of a device for evaluating the flocculation effect of a flocculant provided in the first embodiment of the present invention;

[0042] Figure 2 A schematic diagram of the structure of a filter element of a device for evaluating the flocculation effect of a flocculant provided in the first embodiment of the present invention;

[0043] Figure 3 A schematic structural diagram of a filter element of a device for evaluating the flocculation effect of a flocculant provided in Embodiment 1 of the present invention, without a filter element;

[0044] Figure 4 A schematic diagram of the cross-sectional structure of a filter housing of a device for evaluating the flocculation effect of a flocculant provided in the first embodiment of the present invention;

[0045] Figure 5 A schematic diagram of the cross-sectional structure of another filter housing of the device for evaluating the flocculation effect of a flocculant provided in the first embodiment of the present invention;

[0046] Figure 6 A schematic diagram of the cross-sectional structure of another filter housing of the device for evaluating the flocculation effect of a flocculant provided in the first embodiment of the present invention;

[0047] Figure 7 This is a schematic flow chart of a method for evaluating the flocculation effect of a flocculant provided in Example 2 of the present invention.

[0048] Description of reference numerals:

[0049] 10-Supply assembly of liquid to be flocculated;

[0050] 20-flocculant supply assembly;

[0051] 30- filtration component;

[0052] 31- filter element;

[0053] 32-housing;

[0054] 33-First opening;

[0055] 34 - second opening;

[0056] 35-limiting member;

[0057] 36-limiting groove;

[0058] 37- filter element;

[0059] 38 first valve body;

[0060] 39- second valve body;

[0061] 40-flocculation reaction component;

[0062] 41-piston;

[0063] 42-first chamber;

[0064] 43 - Second chamber;

[0065] 44-driving pump;

[0066] 50-Multi-way valve;

[0067] 60-Waste liquid recovery device. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings.

[0069] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] Embodiment 1

[0071] Figure 1 This is a schematic diagram of the structure of a device for evaluating the flocculation effect of a flocculant provided in Example 1 of the present invention. Figure 2 This is a schematic structural diagram of a filter element of a device for evaluating the flocculation effect of a flocculant provided in Embodiment 1 of the present invention. Figure 3This is a schematic structural diagram of a filter element without a filter element in the device for evaluating the flocculation effect of a flocculant provided in the first embodiment of the present invention. Figure 4 A schematic diagram of the cross-sectional structure of a filter element shell of a device for evaluating the flocculation effect of a flocculant provided in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the cross-sectional structure of another filter element shell of the device for evaluating the flocculation effect of a flocculant provided in Example 1 of the present invention. Figure 6 This is a schematic diagram of the cross-sectional structure of another filter element shell of the device for evaluating the flocculation effect of a flocculant provided in Example 1 of the present invention.

[0072] See attached Figure 1 To Attachment Figure 6 As shown, the first embodiment of the present invention provides a device for evaluating the flocculation effect of a flocculant, comprising:

[0073] The to-be-flocculated liquid supply component 10 , the flocculant supply component 20 , the flocculation reaction component 40 and the filtering component 30 .

[0074] The liquid to be flocculated supply assembly 10 and the flocculant supply assembly 20 are connected to the feed port of the flocculation reaction assembly through the multi-way valve 50, so that the liquid to be flocculated and the flocculant undergo flocculation reaction in the flocculation reaction assembly to generate flocculated precipitates.

[0075] The discharge port of the flocculation reaction component 40 is communicated with the feed port of the filter component 30 , and the filter component 30 includes a plurality of filter elements 31 connected end to end.

[0076] Each filter element 31 is provided with a filter element 37 with different pore sizes, and the pore size of the filter element 37 in the filter element 31 gradually decreases from the side close to the feed port of the filter component 30 to the side close to the discharge port of the filter component 30, so that the flocculated sediment can complete multi-stage filtration in the filter component 30.

[0077] It should be noted that the flocculated liquid supply component 10 in the evaluation device provided in this embodiment may include a liquid storage tank containing the flocculated liquid, the liquid storage tank is connected to the feed port of the flocculation reaction component 40 through a pipeline, and a flow valve may also be provided on the pipeline to control the on-off of the pipeline and adjust the amount of the added liquid to be flocculated. The flocculant supply component 20 may include a storage tank containing flocculant, the storage tank and the feed port of the flocculation reaction component 40 are connected through a pipeline, and similarly, a flow valve may also be provided on the pipeline to control the on-off of the pipeline and adjust the amount of the added flocculant. The ratio of the flocculated liquid and the flocculant can be adjusted as needed, and this embodiment does not limit this.

[0078] Further, the filter element 31 of the filter assembly 30 may be 2, 3 or more, see the attached Figure 1As shown, this embodiment is described by taking three filter elements 31 as an example. In actual use, the number of filter elements 31 can be adjusted as needed.

[0079] Each filter element 31 is provided with a filter element 37, and the filter element 37 includes one or more of a filter membrane, a filter cotton, and a filter net. Due to the flocculation reaction, the flocculant causes the suspended particles in the liquid to be flocculated to aggregate and become larger to form flocs, so the particle size of the flocculated precipitate is relatively large and can be separated by physical filtration. The pore size of the filter element 37 in different filter elements 31 can be different, for example, at the centimeter level, the millimeter level, or the micrometer level. In actual use, the pore size can be selected as needed, and this embodiment is not limited to this, nor is it limited to the above example.

[0080] It should be particularly pointed out that the pore size of the filter element 37 gradually decreases from the side close to the feed port of the filter component 30 to the side close to the discharge port of the filter component 30. Such an arrangement allows the flocculated precipitates in the mixed liquid of the reacted flocculated liquid and the flocculant to be filtered in order from larger particle size to smaller particle size to form a gradient filtration.

[0081] Specifically, the device for evaluating the flocculation effect of a flocculant further includes a waste liquid recovery device 60 , which is connected to the discharge port of the filter assembly 30 and is used to store liquid that has undergone multiple filtrations.

[0082] It should be noted that the waste liquid recovery device 60 may be a liquid storage tank, and a regulating valve may be further provided on the pipeline connecting the liquid storage tank and the discharge port of the filter assembly 30 .

[0083] Furthermore, the filter element 31 further includes a cylindrical housing 32 , and the filter element 37 is disposed in an inner cavity of the housing 32 .

[0084] A first opening 33 is provided at one end of the shell 32, and a second opening 34 is provided at the other end of the shell 32. Both the first opening 33 and the second opening 34 are connected to the inner cavity of the shell 32. The liquid formed by the flocculated liquid and the flocculant flows from the first opening 33 to the second opening 34 in the shell 32.

[0085] The first opening 33 is a feed port of the filter assembly 30 , or the first opening 33 is connected to the second opening 34 of an adjacent filter assembly 30 .

[0086] The second opening 34 is a discharge port of the filter assembly 30 , or the second opening 34 is connected to the first opening 33 of the adjacent filter assembly 30 .

[0087] It should be noted that, refer to the attached Figure 1 To Attachment Figure 3As shown, the housing 32 of the filter element 31 provided in this embodiment can be a cylindrical structure, the cylinder is placed horizontally, and the two ends are respectively a first opening 33 and a second opening 34. The first opening 33 of the filter element 31 closest to the flocculation reaction component 40 is the feed port of the filter component 30, and the second opening 34 is connected to the first opening 33 of the adjacent filter element 31. The first opening 33 of the filter element 31 close to the middle part is connected to the second opening 34 of the filter element 31 at the front end of the liquid flow direction, and the second opening 34 is connected to the first opening 33 of the filter element 31 at the rear end of the liquid flow direction. The first opening 33 of the filter element 31 closest to the waste liquid recovery device 60 is connected to the second opening 34 of the adjacent filter element 31, and the second opening 34 is connected to the waste liquid recovery device 60.

[0088] Furthermore, the filter element 31 also includes a limiting element 35 .

[0089] The limiting member 35 is disposed on the inner cavity of the housing 32 , and the limiting member 35 includes a limiting groove 36 , and the filter element 37 is disposed in the limiting groove 36 to limit the filter element 37 from moving in the inner cavity of the housing 32 along the liquid flow direction.

[0090] It should be noted that since the mixed liquid flows from the first opening 33 to the second opening 34 in the filter element 31, during the flow process, the filter element 37 will be driven to move in the direction of the second opening 34, or the filter element 37 will be pushed to shift, affecting its filtration efficiency. Therefore, the filter element 37 can be set in the limiting groove 36 of the limiting member 35 to limit the position of the filter element 37 to prevent it from moving or shaking and affecting the filtration effect.

[0091] As a preferred embodiment, the filter element 37 is disposed on a side close to the second opening 34 of the filter element 31 , and a filter surface of the filter element 37 is perpendicular to a liquid flow direction in the inner cavity of the housing 32 .

[0092] It should be noted that the filter element 37 is arranged on the side close to the second opening 34, so that after the mixed liquid enters the filter element 31, it stays in the inner cavity of the filter element 31 for a period of time to contact the filter element 37, so as to buffer the impact force of the mixed liquid on the filter element 37, thereby improving the service life of the filter element 37. In addition, the filter surface of the filter element 37 is perpendicular to the flow direction of the mixed liquid, which can ensure that the filter element 37 has the largest filter area, so as to increase the fluid flow rate flowing through the filter surface between units and improve the filtering efficiency.

[0093] As a feasible implementation, the limiting member 35 is at least one protrusion arranged on the inner wall of the shell 32, one end of the protrusion abuts against the inner wall on the side of the first opening 33 close to the filter element 31, and the other end of the protrusion extends toward the inner wall on the side of the second opening 34 close to the filter element 31, and forms a limiting groove 36 with the inner wall on the side close to the second opening 34.

[0094] A portion of the filter element 37 is locked in the limiting groove 36 , and one of the filter surfaces of the filter element 37 is attached to the inner wall near the second opening 34 .

[0095] As a feasible implementation, the limiting member 35 includes a plurality of protrusions, the extension lengths of the plurality of protrusions are the same, and the plurality of protrusions are circumferentially arranged on the inner wall of the shell 32 along the radial direction of the shell 32 .

[0096] It should be noted that, refer to the attached Figure 4 To Attachment Figure 6 As shown, the stopper 35 may be a protrusion disposed on the inner wall of the housing 32. Figure 4 As shown, the protrusion can be provided to fix the filter element 37 in a radial direction of the filter element 37. Figure 5 As shown, the protrusion can be provided in multiple numbers, and two protrusions are taken as an example in the figure. In actual use, more protrusions can be provided. The multiple protrusions are symmetrically arranged around the axis of the housing 32, and the extension lengths of the multiple protrusions in the axis direction of the housing 32 are the same to ensure the stability of the fixed filter element 37. Figure 6 As shown, the protrusion can also be an annular protrusion, the outer wall of the annular protrusion is connected to the inner wall of the housing 32, and the side wall of the annular protrusion forms a limiting surface for limiting the filter element 37. In actual use, the above three setting methods of the limiting member 35 can be selectively used as needed.

[0097] Further, see Attachment Figure 2 As shown, the filter element 37 is attached to the inner wall near the second opening 34, so that the inner wall can provide a certain support to the filter element 37, thereby preventing the filter element 37 from being deformed after being impacted by the mixed fluid and affecting the filtering effect.

[0098] Further, optionally, a first valve body 38 for controlling the opening or closing of the first opening 33 is disposed on the first opening 33 .

[0099] The second opening 34 is provided with a second valve body 39 for controlling the second opening 34 to be opened or closed.

[0100] Specifically, the flocculation reaction assembly 40 includes a reaction chamber, and a reaction cavity is disposed in the reaction chamber.

[0101] A piston 41 is provided in the reaction chamber, and the piston 41 divides the reaction chamber into a first chamber 42 and a second chamber 43 which are not connected to each other. The first chamber 42 is connected to the flocculation liquid supply component 10 and the flocculant supply component 20, and is used for the flocculation reaction between the flocculation liquid and the flocculant. The second chamber 43 is connected to the output end of the driving pump 44.

[0102] The driving pump 44 is used to push the piston 41 to move toward the first chamber 42 , so as to drive the liquid to be flocculated and the flocculant undergoing flocculation reaction in the first chamber 42 to enter the filter assembly 30 .

[0103] It should be noted that, refer to the attached Figure 1 As shown, the driving pump 44 provided in this embodiment can pump air or pressurized liquid into the second chamber 43 to move the piston 41 between the first chamber 42 and the second chamber 43 toward the direction of the first chamber 42 to push the mixed liquid in the first chamber 42 into the filter assembly 30. The driving pump 44 and the piston 41 can not only drive the mixed liquid into the filter assembly 30, but also provide power for the flow of the mixed liquid in the filter assembly 30, thereby improving the filtering effect.

[0104] When evaluating the flocculation effect, the content of the flocculated precipitate can be determined by the mass difference of the filter element 37 before and after filtration and the volume of the mixed liquid flowing through the filter assembly 30. The higher the content value, the better the flocculation effect.

[0105] The evaluation device for the flocculation effect of a flocculant provided in the first embodiment of the present invention is provided with a flocculation reaction component for mixing a liquid to be flocculated and a flocculant to undergo a flocculation reaction and generate a flocculated precipitate, and a driving pump is used to pump the mixed liquid that has undergone a flocculation reaction into a filter component. By providing a plurality of filter elements connected to each other at the end in the filter component, the mixed liquid is allowed to pass through a plurality of filter elements in sequence to complete multi-stage filtration. By providing the pore size of the filter element in the filter element to gradually decrease from the side close to the feed port of the filter component to the side close to the discharge port of the filter component, the flocculation effect of the flocculant in filter media with different pore sizes can be analyzed. By providing a limiter for limiting the movement of the filter element in the filter element, the filter element is prevented from shifting during the filtration process, thereby improving the filtration effect. Therefore, the present invention can comprehensively evaluate the flocculation effect of the flocculant in different filter media.

[0106] Embodiment 2

[0107] Figure 7 This is a schematic flow chart of a method for evaluating the flocculation effect of a flocculant provided in Example 2 of the present invention.

[0108] See attached Figure 7As shown, based on the above-mentioned embodiment 1, embodiment 2 of the present invention provides a method for evaluating the flocculation effect of a flocculant. The evaluation method adopts the above-mentioned device for evaluating the flocculation effect of a flocculant. The evaluation method includes the following steps:

[0109] S1: adding a liquid to be flocculated and a flocculant into the reaction chamber of the flocculation reaction component 40 to cause a flocculation reaction between the liquid to be flocculated and the flocculant.

[0110] S2: Start the driving pump 44 of the flocculation reaction component 40 to allow the flocculated liquid and flocculant to enter the filter component 30, and pass through the multi-stage filtration of the multiple filter elements 31 in the filter component 30. After the filtration is completed, the filter elements 37 in the multiple filter elements 31 are cleaned and dried.

[0111] S3: Obtain the mass of the filter element 37 in the plurality of filter elements 31 before filtration, the mass of the filter element 37 in the plurality of filter elements 31 after filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant.

[0112] S4: Determine the content of flocculated sediment according to the mass of the filter elements 37 in the plurality of filter elements 31 before filtration, the mass of the filter elements 37 in the plurality of filter elements 31 after filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant.

[0113] Further, according to the mass of the filter element 37 in the plurality of filter elements 31 before filtration, the mass of the filter element 37 in the plurality of filter elements 31 after filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant, the content of the flocculated precipitate is determined, specifically including:

[0114] According to the formula

[0115]

[0116] Determine the content of flocculated sediment;

[0117] Among them, C x Indicates the content of flocculation sediment, the unit is mg / L; m' x Indicates the mass of the filter element 37 before filtration, in mg; m x represents the mass of the filter element 37 after filtration, in mg; V represents the volume of the mixed liquid of the liquid to be flocculated and the flocculant passing through the filter assembly 30, in L. Wherein x represents the xth filter element 31 in the multiple filtration assembly 30, and x is a positive integer.

[0118] It should be noted that, based on the above steps, the actual operation steps may also be:

[0119] 1. Select the filter levels of the multiple filter assembly 30 and the pore size of the filter element 37.

[0120] 2. Soak the filter element 37 in distilled water for 30 minutes, and wash it with distilled water for 3 to 4 times.

[0121] 3. Take out the filter element 37 and put it in an oven to dry. The oven temperature is set to 90°C. The weight is constant at room temperature (the error between two times does not exceed 0.2 mg). It is recorded as m x .

[0122] 4. The filter elements 37 of constant weight are moistened with water and installed in the filter element 31, and connected according to the filtration level from the large pore size of the filter element 37 to the small pore size of the filter element 37 to form the gradient filtration in the first embodiment.

[0123] 5. Flocculants A and B are prepared in a certain ratio (generally 1:5 to 5:1) to keep the same total concentration, fully mixed with the liquid to be flocculated (such as sewage), left to stand for a certain period of time, and then added to the flocculation reaction component 40. The total amount of the liquid to be flocculated and the flocculant mixed liquid is V mL.

[0124] 6. Use nitrogen to pressurize the filter assembly 30 so that the pressure inside is maintained at 0.1-0.2 MPa.

[0125] 7. Set the stop pressure of the driving pump 44, start the driving pump 44, open the valve between the driving pump 44 and the flocculation reaction component 40, and pump the mixed liquid into the filtration component 30 at a certain flow rate until the pressure of the driving pump 44 rises to the set value and the pump stops automatically.

[0126] 8. After the mixed liquid in the flocculation reaction component 40 is injected, the filter component 30 is driven with an appropriate amount of clean water to ensure that the solid suspended matter in the mixed liquid in the filter component 30 is fully filtered.

[0127] 9. After all the sewage has been filtered, release the pressure of the entire device, disassemble the filter elements 31 at each level, remove the filter element 37 from the device with tweezers and dry it. If the mixed liquid contains oil, rinse the filter element 37 with gasoline until the filtrate is colorless (clean at least 4 times), then remove the filter element 37 and dry it.

[0128] 10. Wash the filter element 37 with distilled water until there are no chloride ions in the water.

[0129] 11. Repeat steps 2 and 3, recorded as m' x .

[0130] 12. Calculate the flocculation sediment content according to the above formula. The higher the content value, the better the flocculation effect.

[0131] Other technical features are the same as those in Example 1 and can achieve the same technical effects, which will not be described in detail here.

[0132] The evaluation method of the flocculation effect of a flocculant provided in the second embodiment of the present invention is applied to the above-mentioned evaluation device of the flocculation effect of a flocculant, wherein the evaluation device is provided with a flocculation reaction component for mixing the liquid to be flocculated and the flocculant to undergo a flocculation reaction and generate a flocculated precipitate, and the mixed liquid that undergoes the flocculation reaction is pumped into the filter component by driving a pump. By providing a plurality of filter elements connected to each other at the end in the filter component, the mixed liquid is passed through a plurality of filter elements in sequence to complete multi-stage filtration. By setting the aperture of the filter element in the filter element to gradually decrease from the side close to the feed inlet of the filter component to the side close to the discharge outlet of the filter component, the flocculation effect of the flocculant in the filter medium with different apertures can be analyzed. By providing a limiter for limiting the movement of the filter element in the filter element, the filter element is prevented from shifting during the filtration process, thereby improving the filtration effect. Therefore, the present invention can comprehensively evaluate the flocculation effect of the flocculant in different filter media.

[0133] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In the description of the present invention, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0134] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for evaluating the flocculation effect of a flocculant, characterized in that: include: A flocculation liquid supply component, a flocculant supply component, a flocculation reaction component, and a filtration component; The flocculated liquid supply component and the flocculant supply component are connected to the feed port of the flocculation reaction component through a multi-way valve, so that the flocculated liquid and the flocculant undergo flocculation reaction in the flocculation reaction component and generate flocculated precipitates; The discharge port of the flocculation reaction component is communicated with the feed port of the filter component, the filter component includes a plurality of filter elements connected end to end, the flocculation reaction component includes a reaction chamber, and a reaction cavity is provided in the reaction chamber; A piston is arranged in the reaction chamber, and the piston divides the reaction chamber into a first chamber and a second chamber which are not connected to each other. The first chamber is connected to the to-be-flocculated liquid supply component and the flocculant supply component, and is used for the to-be-flocculated liquid and the flocculant to produce a flocculation reaction, and the second chamber is connected to the output end of the driving pump; The driving pump is used to push the piston to move toward the first chamber, so as to drive the liquid to be flocculated and the flocculant undergoing flocculation reaction in the first chamber to enter the filter assembly; Each of the filter elements is provided with filter elements of different pore sizes, and the pore sizes of the filter elements in the filter element gradually decrease from the side close to the feed inlet of the filter element to the side close to the discharge outlet of the filter element, so that the flocculated sediment can be filtered in multiple stages in the filter element; the filter element also includes a cylindrical shell, and the filter element is arranged in the inner cavity of the shell; A first opening is provided at one end of the shell, and a second opening is provided at the other end of the shell. Both the first opening and the second opening are communicated with the inner cavity of the shell. The liquid formed by the to-be-flocculated liquid and the flocculant flows from the first opening to the second opening in the shell. A first valve body for controlling the opening or closing of the first opening is provided on the first opening, and a second valve body for controlling the opening or closing of the second opening is provided on the second opening. The first opening is a feed port of the filter assembly, or the first opening is connected to the second opening of an adjacent filter assembly; The second opening is a material outlet of the filter assembly, or the second opening is connected to the first opening of the adjacent filter assembly; the filter element further includes a stopper; The limiting member is arranged on the inner cavity of the housing, and the limiting member comprises a limiting groove, and the filter element is arranged in the limiting groove to limit the filter element from moving in the inner cavity of the housing along the liquid flow direction; The filter element is arranged on a side close to the second opening of the filter element, and a filter surface of the filter element is perpendicular to a flow direction of the liquid in the inner cavity of the shell.

2. The device for evaluating the flocculation effect of a flocculant according to claim 1, characterized in that: The limiting member is at least one protrusion arranged on the inner wall of the shell, one end of the protrusion abuts against the inner side wall near the first opening of the filter element, and the other end of the protrusion extends to the inner side wall near the second opening of the filter element, and forms the limiting groove with the inner side wall near the second opening; Part of the filter element is clamped in the limiting groove, and one of the filter surfaces of the filter element is attached to the inner side wall close to the second opening.

3. The device for evaluating the flocculation effect of a flocculant according to claim 2, characterized in that: The limiting member includes a plurality of protrusions, the extension lengths of the plurality of protrusions are the same, and the plurality of protrusions are circumferentially arranged on the inner wall of the shell along the radial direction of the shell.

4. The device for evaluating the flocculation effect of a flocculant according to any one of claims 1 to 3, characterized in that: It also includes a waste liquid recovery device, which is connected to the discharge port of the filter component and is used to store liquid that has undergone multiple filtrations.

5. The device for evaluating the flocculation effect of a flocculant according to any one of claims 1 to 3, characterized in that: The filter element includes one or more of a filter membrane, filter cotton and a filter net.

6. A method for evaluating the flocculation effect of a flocculant, characterized in that: The method for evaluating the flocculation effect of a flocculant adopts the device for evaluating the flocculation effect of a flocculant according to any one of claims 1 to 5, and the method for evaluating the flocculation effect of a flocculant comprises the following steps: Adding the liquid to be flocculated and the flocculant into the reaction chamber of the flocculation reaction component to cause the liquid to be flocculated and the flocculant to undergo a flocculation reaction; Starting the driving pump of the flocculation reaction component to allow the flocculated liquid and the flocculant to enter the filter component, and pass through the multi-stage filtration of the multiple filter elements in the filter component. After the filtration is completed, the filter elements in the multiple filter elements are cleaned and dried; Obtaining the mass of the filter elements in the plurality of filter elements before filtration, the mass of the filter elements in the plurality of filter elements after filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant; The content of flocculated sediment is determined according to the mass of the filter elements in the plurality of filter elements before the filtration, the mass of the filter elements in the plurality of filter elements after the filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant.

7. The method for evaluating the flocculation effect of a flocculant according to claim 6, characterized in that: Determining the content of flocculated sediment according to the mass of the filter elements in the plurality of filter elements before the filtration, the mass of the filter elements in the plurality of filter elements after the filtration, and the volume of the mixed liquid of the liquid to be flocculated and the flocculant specifically includes: According to the formula determining the content of the flocculated precipitate; Among them, the C x Indicates the content of flocculation sediment, in mg / L; m' x Indicates the mass of the filter element before filtration, in mg; m x It represents the mass of the filter element after filtration, in mg; V represents the volume of the mixed liquid of the liquid to be flocculated and the flocculant passing through the filter component, in L.

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