Multi-stage series filtering structure of bypass filter

Abstract

The utility model relates to the technical field of filters, in particular to a multi-stage series filter structure of a bypass filter, which is used for waste liquid conduction between at least two filter bodies and comprises a venturi tube and a one-way valve connected with the venturi tube, and the one-way valve is used for adding reagents into waste liquid. The Venturi tube sequentially comprises a contraction section, a throat part and a diffusion section along the conveying direction of the waste liquid; wherein the throat part is divided into a fixed part and a movable part, and the two ends of the fixed part are connected with the contraction section and the expansion section respectively. Compared with a traditional method, the multi-stage series filter structure provided by the technical scheme realizes breakthrough improvement of waste liquid treatment efficiency and quality through the synergistic effect of the Venturi tube and the honeycomb plate, the contact area of a reagent and the waste liquid is enlarged by more than 80% through the combination of a negative pressure mixing system constructed based on the Venturi effect and a turbulent flow synergistic design of the honeycomb plate, and the treatment effect of the reagent is improved. The chemical reaction uniformity is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field, concretely relates to a kind of multistage series filter structure of bypass filter. BACKGROUND

[0002] Bypass filter is the common waste liquid treatment equipment in chemical industry, after the filter cartridge of waste liquid to be handled, large impurities are blocked and discharged, and liquid meeting environmental protection requirement is obtained and reused.

[0003] The patent document with patent announcement No. CN213853330U discloses a series multistage filter, comprising a magnetic filter cartridge, a 60-mesh coarse filter cartridge, a 100-mesh coarse filter cartridge and a 200-mesh fine filter cartridge. The series multistage filter facilitates the entry of liquid from the magnetic filter end, and the exit of fine 200-mesh filtration.

[0004] The above-mentioned scheme focuses on the sequential filtration of waste liquid and does not involve the addition of reagents to the waste liquid to improve the waste liquid filtration quality. Traditional multistage bypass filter systems usually use the method of adding reagents after opening the filter tank. This method relies on mechanical stirring and has mixing dead angles, which is not conducive to improving the waste liquid filtration quality. UTILITY MODEL CONTENT

[0005] The utility model aims to at least solve one of the technical problems in the related art to some extent. Therefore, the purpose of the utility model is to provide a multistage series filter structure of bypass filter to improve the waste liquid filtration quality and efficiency.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A multistage series filter structure of bypass filter for conducting waste liquid between at least two filter bodies, comprising a Venturi tube and a one-way valve connected to the Venturi tube, the one-way valve being used to add reagents to the waste liquid.

[0008] The Venturi tube has, in sequence along the conveying direction of the waste liquid, a converging section, a throat section and a diffuser section.

[0009] The throat section is divided into a fixed part and a movable part, the two ends of the fixed part are connected to the converging section and the diffuser section respectively, and the fixed part and the movable part are locked by a limiting assembly. The fixed part and the movable part are closed to form a cavity, and a honeycomb plate is detachably connected inside the cavity.

[0010] In some embodiments of the utility model, the cross-sectional area ratio of the converging section to the diffuser section is between 1:2.5 and 1:4, and the converging section and the diffuser section are connected to adjacent filter bodies by flanges.

[0011] In some embodiments of the utility model, the movable part and the one-way valve are detachably connected.

[0012] In some embodiments of the utility model, the fixed part and the movable part are both semicircular structures, and form a complete circular pipe after butt joint.

[0013] In some embodiments of the utility model, the limiting assembly comprises a locking nut and a stopper, the bottom of the fixed part is connected with a supporting plate, the both ends of the supporting plate are respectively connected with fixed blocks, one end of a rotating rod is rotatably connected with the fixed blocks, the other end of the rotating rod is threadedly connected with the locking nut, the stopper is installed on the surface of the movable part, and the locking nut and the stopper abut to realize the limiting locking of the fixed part and the movable part.

[0014] In some embodiments of the utility model, the stopper, the fixed part and the movable part are all provided with limiting grooves corresponding to the position of the rotating rod.

[0015] In some embodiments of the utility model, the butt joint surfaces of the fixed part and the movable part are respectively provided with guide columns and guide grooves, and the top end of the guide column is rounded.

[0016] In some embodiments of the utility model, the inner walls of the fixed part and the movable part are respectively provided with lower limiting strips and upper limiting strips corresponding to the position of the honeycomb plate, the lower limiting strips and the upper limiting strips are both provided with two in the axial direction of the throat portion to form a limiting space, and the honeycomb plate is clamped in the limiting space.

[0017] In some embodiments of the utility model, the end surfaces of the movable part, the contraction section and the diffusion section are all provided with sealing structures, the sealing structure comprises a metal gasket and a rubber strip, and the metal gasket and the rubber strip are sequentially arranged in the radial direction of the throat portion.

[0018] In some embodiments of the utility model, the metal gasket is made of graphite, and the rubber strip is made of fluororubber.

[0019] The utility model discloses the beneficial effect:

[0020] Compared with the traditional method, the multistage series filter structure provided by the technical scheme breaks through the efficiency and quality of waste liquid treatment, and realizes the breakthrough promotion of the efficiency and quality of waste liquid treatment based on the synergistic effect of the venturi tube and the honeycomb plate. The negative pressure mixing system based on the venturi effect combines the turbulent flow efficiency design of the honeycomb plate, so that the contact area of the reagent and the waste liquid is expanded by more than 80%, the uniformity of chemical reaction is significantly improved, and the overall scheme reaches the industrial grade optimization standard in three dimensions of mixing efficiency, maintenance convenience and system expansibility. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram illustrating the application scenario of this utility model;

[0023] Figure 2 This is a perspective view of the present invention;

[0024] Figure 3 This is a perspective view of the fixing part in this utility model;

[0025] Figure 4 The stereoscopic view of the movable part in this utility model Figure 1 ;

[0026] Figure 5 The stereoscopic view of the movable part in this utility model Figure 2 .

[0027] In the diagram: 1. Filter body; 2. Venturi tube; 3. Check valve; 4. Contraction section; 5. Throat; 51. Fixing part; 511. Support plate; 512. Fixing block; 513. Rotating rod; 514. Locking nut; 515. Guide column; 516. Lower limit stop bar; 52. Moving part; 521. Stop block; 522. Guide groove; 523. Upper limit stop bar; 524. Metal gasket; 525. Rubber strip; 6. Diffusion section; 7. Flange; 8. Honeycomb panel; 9. Limit groove. Detailed Implementation

[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0029] like Figure 1 , Figure 2 As shown, a multi-stage series filtration structure for bypass filters is used for waste liquid conduction between at least two filter bodies 1. It includes a venturi tube 2 and a one-way valve 3 connected to the venturi tube 2. The one-way valve 3 automatically draws in reagents and introduces them into the venturi tube 2 through the principle of negative pressure. The venturi tube 2 is arranged in the following order along the waste liquid conveying direction: a constriction section 4, a throat section 5, and a diffusion section 6.

[0030] Wherein, the throat 5 is divided into a fixed part 51 and a movable part 52, both ends of the fixed part 51 are connected with the converging section 4 and the diverging section 6 respectively, the fixed part 51 and the movable part 52 are locked through a limiting assembly, and the cavity formed after the fixed part 51 and the movable part 52 are closed is detachably connected with a honeycomb plate 8 for enhancing the mixing effect of the reagent and the waste liquid, and the one-way valve 3 automatically sucks the reagent through the negative pressure principle.

[0031] When filtering, the waste liquid flows through the Venturi tube 2, the converging section 4 accelerates the fluid, the throat 5 forms a negative pressure area, the one-way valve 3 is triggered to suck the reagent, the reagent can be an oxidizing / reducing agent, a pH regulator, a flocculant or a surfactant, the honeycomb aperture structure of the honeycomb plate 8 divides the waste liquid into microflows, increases the reagent contact area and improves the chemical reaction efficiency, and the diverging section 6 reduces the flow rate through the enlarged cross section, so that the mixed liquid smoothly enters the next filter body 1.

[0032] As an example, the oxidizing / reducing agent is added into the waste liquid, the instantaneous high temperature (about 5000K) and high pressure (100MPa) generated by the cavitation effect of the throat of the Venturi tube accelerate the oxidation-reduction reaction, decompose organic matter (such as cyanide, phenolic compounds) or reduce heavy metal ions (such as Cr 6 ⁺→Cr³⁺).

[0033] As an example, the pH regulator is added into the waste liquid, the high shear mixing characteristics of the throat of the Venturi tube are utilized to quickly neutralize the acidic / alkaline waste liquid, and promote the formation of micron-sized flocs of metal hydroxides (such as Fe(OH)3, Al(OH)3).

[0034] As shown in Figure 2 In some embodiments of the utility model, the cross-sectional area ratio of the converging section 4 to the diverging section 6 is between 1:2.5 and 1:4, and the converging section 4 and the diverging section 6 are connected with adjacent filter bodies 1 through flanges 7, the flanges 7 adopt ANSI standard flanges to ensure compatibility with different models of filter bodies 1.

[0035] It should be noted that too small cross-sectional area ratio (such as less than 1:2.5) can enhance the negative pressure of the throat, but may cause cavitation corrosion; too large ratio (such as greater than 1:4) may not have sufficient negative pressure, and the optimal value needs to be determined through experiments.

[0036] As an example, the flanges 7 are embedded with O-shaped sealing rings to prevent leakage at the connection.

[0037] In some embodiments of the utility model, the movable part 52 is detachably connected with the one-way valve 3. The movable part 52 is connected with the one-way valve 3 through threads or clamping grooves to ensure that the reagent injection channel is independent of the main liquid flow. The one-way valve 3 adopts a spring-loaded structure to allow only one-way flow of the reagent.

[0038] As shown in Figure 3、 Figure 4 As shown in some embodiments of the utility model, the fixed part 51 and the movable part 52 are both semicircular structures, and form a complete circular pipe after butt joint and closure. The fixed part 51 and the movable part 52 are both semicircular cast steel parts, and the inner wall is smooth after closure, avoiding flow resistance.

[0039] As an example, the inner wall of the fixed part 51 and the movable part 52 is sprayed with a polytetrafluoroethylene coating to reduce waste liquid residue.

[0040] As shown in some embodiments of the utility model, Figure 3 、 Figure 4 、 Figure 5 As shown in some embodiments of the utility model, the limiting assembly includes a locking nut 514 and a stop block 521, the bottom of the fixed part 51 is connected with a support plate 511, both ends of the support plate 511 are respectively connected with fixed blocks 512, one end of the fixed blocks 512 is rotationally connected with a rotating rod 513, the other end of the rotating rod 513 is threadedly connected with the locking nut 514, the stop block 521 is installed on the surface of the movable part 52, and the locking nut 514 and the stop block 521 abut to realize the limiting locking of the fixed part 51 and the movable part 52. When locking and limiting, the rotating rod 513 rotates around the fixed block 512 to above the stop block 521, the locking nut 514 is tightened, the rotating rod 513 presses down the stop block 521, the fixed part 51 and the movable part 52 are tightly closed, and the positions corresponding to the rotating rod 513 rotationally coinciding of the stop block 521, the fixed part 51 and the movable part 52 are all provided with limiting grooves 9, the limiting grooves 9 ensure the accurate rotating track of the rotating rod 513, avoiding misplacement.

[0041] As an example, the stop block 521 can be used as a limiting assembly, and can also serve as a fulcrum for the operator's force when separating the movable part 52, which is conducive to separating the movable part 52 and the fixed part 51.

[0042] As an example, the rotating rod 513 is made of 316L stainless steel, which is corrosion-resistant and has high strength, and a shock-absorbing rubber pad is additionally installed at the bottom of the support plate 511 to reduce the influence of pipeline vibration.

[0043] As shown in some embodiments of the utility model, Figure 3 、 Figure 4 As shown in some embodiments of the utility model, the butt joint surfaces of the fixed part 51 and the movable part 52 are respectively provided with a guide column 515 and a guide groove 522, and the top end of the guide column 515 is rounded. The top end of the guide column 515 is rounded to prevent scratching the guide groove 522 during assembly, and to enhance the guiding property, which is conducive to the closure of the fixed part 51 and the movable part 52.

[0044] As shown in some embodiments of the utility model, Figure 3 、 Figure 4As shown, in some embodiments of the utility model, the inner wall of fixed part 51 and movable part 52 corresponds the position of honeycomb plate 8 respectively sets up lower limit stop strip 516 and upper limit stop strip 523, lower limit stop strip 516 and upper limit stop strip 523 are spaced apart along the axial direction of throat part 5 and are provided with two to form a limiting space, and honeycomb plate 8 is clamped in the limiting space. After opening movable part 52, the honeycomb plate 8 that needs to be replaced can be pulled out, and a new honeycomb plate 8 is inserted into the limiting space, and then movable part 52 is closed, so that lower limit stop strip 516 and upper limit stop strip 523 are symmetrical to form a complete limiting space.

[0045] As shown, Figure 4 As shown, in some embodiments of the utility model, the end face of movable part 52 in contact with contraction section 4 and diffusion section 6 is provided with a sealing structure, the sealing structure includes metal gasket strip 524 and rubber strip 525, and metal gasket strip 524 and rubber strip 525 are sequentially arranged along the radial direction of throat part 5. Graphite material is high-temperature resistant (up to 450 DEG C), fills macroscopic gap, and fluorine rubber is oil and chemical resistant, and compensates for micro unevenness.

[0046] It should be noted that the hardening condition of rubber strip 525 is checked every 6 months, and is replaced if necessary, and metal gasket strip 524 needs to be replaced when the wear exceeds 1 / 3 of the thickness.

[0047] The multi-stage series filtering structure provided by the scheme realizes breakthrough improvement of waste liquid treatment efficiency and quality through the synergistic effect of venturi tube 2 and honeycomb plate 8. The innovation is reflected in three aspects:

[0048] First, the negative pressure mixing system (contraction section 4 / throat part 5 / diffusion section 6) based on the Venturi effect is combined with the turbulent flow enhancement design of honeycomb plate 8, so that the contact area of the reagent and the waste liquid is expanded by more than 80%, and the uniformity of chemical reaction is significantly improved;

[0049] Second, the modular split structure (fixed part 51 / movable part 52) cooperates with the rotating rod 513 limiting assembly, so that the replacement time of honeycomb plate 8 is greatly shortened, and the sealing structure (graphite gasket strip 524+fluorine rubber strip 525) realizes double sealing protection;

[0050] Third, the Venturi ratio design of 1:2.5-1:4 cooperates with the standardized interface of flange plate 7, which not only ensures the stability of system pressure, but also can be flexibly expanded to a four-stage or more filtering system, which adapts to different working condition requirements, and the overall scheme achieves industrial-level optimization standards in three dimensions of mixing efficiency, maintenance convenience and system expandability.

[0051] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above is only an example and description of the utility model, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as it does not deviate from the utility model or exceed the scope defined by the present claims, which shall belong to the protection scope of the utility model.

Claims

1. A multi-stage series filtration structure for bypass filters, used for wastewater conduction between at least two filter bodies, characterized in that, Includes a venturi tube and a one-way valve connected to the venturi tube, the one-way valve being used to add reagents to the waste liquid; The Venturi tube, along the direction of waste liquid transport, consists of the following sections: contraction section, throat, and diffusion section. The throat is divided into a fixed part and a movable part. The two ends of the fixed part are connected to the contraction section and the diffusion section, respectively. The fixed part and the movable part are locked together by a limiting component. A honeycomb plate is detachably connected inside the cavity formed after the fixed part and the movable part are closed.

2. The multi-stage series filtration structure of a bypass filter according to claim 1, characterized in that, The ratio of the cross-sectional area of ​​the contraction section to the cross-sectional area of ​​the diffusion section is between 1:2.5 and 1:4, and both the contraction section and the diffusion section are connected to the adjacent filter body via flanges.

3. The multi-stage series filtration structure of a bypass filter according to claim 1, characterized in that, The movable part is detachably connected to the one-way valve.

4. The multi-stage series filtration structure of a bypass filter according to claim 1, characterized in that, Both the fixed part and the movable part are semi-circular structures, and when they are joined and closed, they form a complete circular tube.

5. The multi-stage series filtration structure of a bypass filter according to claim 1, characterized in that, The limiting component includes a locking nut and a stop. A support plate is connected to the bottom of the fixed part. Fixed blocks are connected to both ends of the support plate. One end of a rotating rod is rotatably connected to the fixed block. The other end of the rotating rod is threadedly connected to the locking nut. The stop is installed on the surface of the movable part. After the locking nut and the stop abut against each other, the fixed part and the movable part are limited and locked.

6. The multi-stage series filtration structure of a bypass filter according to claim 5, characterized in that, Limiting grooves are provided on the stop block, the fixed part, and the movable part at the positions where the rotating rod rotates and overlaps.

7. The multi-stage series filtration structure of a bypass filter according to claim 1, characterized in that, The mating surfaces of the fixed part and the movable part are respectively provided with guide posts and guide grooves, and the top of the guide posts is rounded.

8. The multi-stage series filtration structure of a bypass filter according to claim 1, characterized in that, The inner walls of the fixed part and the movable part are respectively provided with a lower limit stop and an upper limit stop corresponding to the position of the honeycomb panel. Two of the lower limit stop and the upper limit stop are provided at intervals along the axial direction of the throat to form a limiting space, and the honeycomb panel is snapped into the limiting space.

9. The multi-stage series filtration structure of a bypass filter according to claim 1, characterized in that, The end faces of the movable part that contact the contraction section and the diffusion section are all provided with sealing structures. The sealing structures include metal gaskets and rubber strips, which are arranged sequentially along the radial direction of the throat.

10. The multi-stage series filtration structure of a bypass filter according to claim 9, characterized in that, The metal pad is made of graphite, and the rubber strip is made of fluororubber.

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