Small sewage deep purification filter with two-stage homogeneous filter materials distributed inside and outside

Abstract

The utility model relates to the technical field of sewage treatment filtering equipment, in particular to a small-sized sewage deep purification filter with two-stage homogeneous filter materials distributed inside and outside, which comprises a structural main body, a quartz sand filtering assembly, an activated carbon filtering assembly and a water inlet distributor, an annular isolation belt is arranged in the structure main body, the structure main body is divided into an inner ring cylindrical cavity and an outer ring annular cavity by the annular isolation belt, a circle of overflowing holes are uniformly distributed in the bottommost end of the annular isolation belt close to the cylinder bottom, the inner ring cylindrical cavity is communicated with the outer ring annular cavity through the overflowing holes, and two overflowing water outlets are formed in the cylinder wall of the structure main body; the quartz sand filtering assembly is inserted into the inner ring cylindrical cavity, and the activated carbon filtering assembly is inserted into the outer ring annular cavity; and the water inlet distributor is mounted at the top of the inner ring cylindrical cavity. The structure avoids the defect that the utilization rate of the lower layer filter material is low after the upper layer filter material is blocked, and the height of each filter material can be designed and calculated as a single-layer filter material process and is far higher than the effective filter material height of a double-layer filter material.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment filter equipment technical field especially, relates to a two -stage homogeneous filter material inside and outside distribution's sewage advanced purification small -size filter. BACKGROUND

[0002] Single quartz sand, anthracite, activated carbon particle and so on as filter medium's sand filter process, realized extensive industrial application, large -scale filter tank has very mature design operation experience in sewage plant, water supply plant, and its equipment sand filter tank treatment equipment and technology also often appear with other treatment process, for the scene under the higher purification requirement. In order to guarantee effluent quality, traditional sand filter technology usually adopts double -deck or three -deck filter material form, but the retention and adsorption capacity of filter material has the inevitable load upper limit, and the filter material needs to be cleaned regularly to regenerate, to ensure the continuous operation of the process, so the filter tank or sand filter tank these process carriers are also equipped with backwashing facilities. Such as the sewage treatment equipment of a kind of backwash device and its backwash method of Chinese patent, application number: CN202210102669.6, it includes sand filter tank, backwash tank and gas source, the top of sand filter tank is provided with exhaust valve, the upper portion of sand filter tank is provided with water inlet valve, the lower portion of sand filter tank is provided with water outlet valve, the upper portion of sand filter tank is provided with backwash valve, the bottom of sand filter tank is provided with positive valve and air inlet valve respectively, the lower portion of sand filter tank is provided with backwash valve, the backwash tank is connected with backwash valve, the gas source is connected with air inlet valve;Sand filter tank through water backwash, gas washing and secondary water backwash.

[0003] The above structure has the following defects: first, the setting of backwashing function makes the water distribution system necessary, greatly increasing the structural complexity of the filter tank, in addition, various factors such as water distribution effect, pore flow rate and water head loss need to be considered in design, thus increasing the design difficulty;Second, the existence of backwashing time increases the working cycle of the single filter facility, reduces the effective working time of filtration, and additional filter facilities often need to be added for this purpose;Third, when single-layer homogeneous filter material is used, the homogeneous filter material layer is more likely to become a graded filter material layer under the action of hydraulic grading during backwashing due to the high rigidity and incompressibility of common filter materials such as quartz sand;Fourth, if the filter tank or sand filter tank is designed with two or three layers of filter material, multiple filter materials are often arranged in sequence from top to bottom, which often causes the upper layer of filter material to be blocked due to its high pollution capacity, thus limiting the height of the filter layer during design, and different filter materials are prone to mixing, increasing the density requirements of the filter material. SUMMARY

[0004] The utility model aims at overcoming the above -mentioned technical insufficiency, and provides a two -stage homogeneous filter material inside and outside distribution's sewage advanced purification small -size filter.

[0005] The utility model discloses a two-stage homogenization filter material inner and outer distribution's sewage advanced purification small filter, including structure main part, quartz sand filter assembly, activated carbon filter assembly and water inlet water distributor,

[0006] Wherein, the structure main part is the cylindrical structure of having the bottom, no top cover, and the inside of structure main part is equipped with annular isolation zone, and annular isolation zone divides structure main part into inner circle cylindrical cavity and outer circle annular cavity, and the bottom end of annular isolation zone is close to the place of bottom and evenly distributes a circle overflow hole, and overflow hole communicates inner circle cylindrical cavity and outer circle annular cavity, and the wall of structure main part is equipped with two overflow water outlets,

[0007] Quartz sand filter assembly is inserted in the inner circle cylindrical cavity, and activated carbon filter assembly is inserted in the outer circle annular cavity,

[0008] Water inlet water distributor is installed at the top of inner circle cylindrical cavity.

[0009] Preferably, the top of the structure main part is circumferentially provided with a connecting groove.

[0010] Preferably, the quartz sand filter assembly includes a first containing shell, a first supporting layer and quartz sand filter material. The first containing shell is a bottomed cylindrical structure without a lid, and its diameter is the same as that of the inner circle cylindrical cavity of the filter structure main part. The top end of the first containing shell is outwardly bent to form a first U-shaped lug. The first U-shaped lug cooperates with the connecting groove. A rubber sleeve is attached to the outer surface of the first containing shell. The bottom of the first containing shell is provided with a first hollow hole. The inside of the first containing shell is sequentially provided with quartz sand homogenization filter material and the first supporting layer from top to bottom.

[0011] Preferably, the quartz sand homogenization filter material is quartz sand with a particle size of 1-2 mm, and the first supporting layer is gravel with a particle size of 2-4 mm and a height of 0.1 m.

[0012] Preferably, a limiting ring is provided on the inner wall of the first containing shell above the first U-shaped lug for supporting the water inlet water distributor.

[0013] Preferably, a liquid level sensor is provided on the inner wall of the first containing shell.

[0014] Preferably, the active carbon filter assembly comprises a second containing shell, a second supporting layer and active carbon filter material, the second containing shell is a bottomed annular structure without a cover, the ring width is the same as the outer ring annular cavity of the filter structure main body, the top end of the second containing shell is outwardly bent to form a ring of second U-shaped ears, the second U-shaped ears are matched with the connecting grooves, a rubber sleeve is attached to the outer surface of the second containing shell, the bottom of the second containing shell is provided with second hollow holes, and the side is provided with through holes corresponding to the overflow water outlets, the inside of the cavity of the second containing shell is sequentially provided with the active carbon homogeneous filter material and the second supporting layer from top to bottom.

[0015] Preferably, the active carbon homogeneous filter material is active carbon with a particle size of 1-2 mm, and the height is 0.5 m; and the second supporting layer is gravel with a particle size of 2-4 mm, and the height is 0.1 m.

[0016] Preferably, the water inlet distributor main body is a cylindrical body with a height of 0.1 m and a diameter the same as the inner diameter of the quartz sand filter, a hole is formed in the center of the top plate as a water inlet, a water inlet pipe is screwed at the water inlet, the bottom plate is provided with water passing holes, the area of each water passing hole is equal, and the water passing holes are distributed in a plum blossom shape at equal intervals, the sum of the areas of the water passing holes accounts for no more than 40% of the total area of the bottom plate, and no water passing hole is formed in the center of the bottom plate, and a rubber sleeve is attached to the outer surface of the side wall of the water inlet distributor for tightly fixing the water inlet distributor to the quartz sand filter assembly.

[0017] Preferably, two lifting hook sockets are respectively arranged at the symmetrical positions of the top ends of the quartz sand filter assembly, the active carbon filter assembly and the water inlet distributor relative to the center, and the two lifting hook sockets are used for being connected with hoisting equipment or lifting equipment.

[0018] The active carbon filter assembly has the following advantages: (1) The two kinds of filter materials are arranged in an inner-outer distribution form, which is different from the traditional up-down arrangement, and the problem of low utilization rate of the lower filter material caused by the blockage of the upper filter material is avoided, and the height of each kind of filter material can be designed and calculated as a single-layer filter material process, which is much higher than the effective filter material height of a double-layer filter material.

[0019] (2) The filter does not have a built-in backwashing mechanism, the filter material is made into a detachable modular assembly, the filter assembly is removed from the reactor main body to replace the filter material outside the body to achieve the regeneration purpose, the backwashing time is saved, the effective working time of the reactor is longer, and the problem that the homogeneous filter material layer becomes a graded filter material layer caused by backwashing is avoided, and the density requirement of the filter material is correspondingly reduced.

[0020] (3) The filter guarantees the uniform distribution of the fluid in each space of the filter through many design details, such as taking a circular frame as the main body, optimizing the water passing hole arrangement of the water distributor, roughening the inner surface of the side wall of the filter assembly, and designing the symmetrical double water outlets, so that the occurrence of short flow and other adverse flow states is effectively reduced, and the utilization rate of the filter material layer is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is an exploded view of the utility model;

[0022] Figure 2 is a sectional view of the structural body in the utility model;

[0023] Figure 3 is a sectional view of the quartz sand filtering assembly in the utility model;

[0024] Figure 4 is a sectional view of the activated carbon filtering assembly in the utility model;

[0025] Figure 5 is a sectional view of the water inlet distributor in the utility model;

[0026] Figure 6 is an assembly drawing of the utility model;

[0027] In the drawing: 1, structural body; 11, annular isolation belt; 12, inner circle cylindrical cavity; 13, outer circle annular cavity; 14, a circle of circular connecting grooves; 15, two circles of circular connecting grooves; 16, overflow hole; 17, overflow water outlet; 2, quartz sand filtering assembly; 21, first containing shell; 22, first supporting layer; 23, quartz sand filter material; 24, first hollow hole; 25, first U-shaped lug; 26, first lifting hook joint seat; 27, limiting ring; 3, activated carbon filtering assembly; 31, second containing shell; 32, second supporting layer; 33, activated carbon filter material; 34, second hollow hole; 35, through hole; 36, second U-shaped lug; 37, second lifting hook joint seat; 4, water inlet distributor; 41, water inlet; 42, water passing hole; 43, third lifting hook joint seat; 5, rubber sleeve pad; 6, liquid level sensor. DETAILED DESCRIPTION

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0030] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixed connection", "fixed connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood by specific circumstances.

[0031] The specific implementation of the present application will be described in detail below in combination with the drawings and preferred embodiments.

[0032] As shown in Figure 1 A two-stage homogeneous filter material inner and outer distribution of sewage advanced purification small filter, comprising a structural body 1, quartz sand filter assembly 2, activated carbon filter assembly 3 and water distributor 4.

[0033] As shown in Figure 2As shown, the structural body is a cylindrical barrel with a bottom, no top cover, and an inner partition. The barrel wall is 2.2 meters high. The internal space of the barrel is divided into an inner circular cylindrical cavity 12 and an outer circular annular cavity 13 by a circular annular isolation belt 11 which is the same height as the barrel wall. The ratio of the outer circular ring width to the inner circular cylindrical radius is 0.4:1. The isolation belt is connected to the barrel bottom, and the barrel bottom, barrel wall, and isolation belt are integrally formed and cast. The inner circular cylindrical cavity is used to place a quartz sand filter assembly, and the outer circular annular cavity is used to place an activated carbon filter assembly. Both filter assemblies are in a detachable form and can be separated from the structural body for replacement of filter material or maintenance. The filter assembly and the structural body are connected by a slot connection method. The top end of the structural body has a circular connecting groove 14, and the top end of the isolation belt has two circular connecting grooves 15. The ratio of the groove depth to the height of the structural body is not less than 1:10. The bottom end of the isolation belt is evenly distributed with a circular opening as a flow hole 16 close to the barrel bottom, which connects the inner circular cylindrical cavity 12 and the outer circular annular cavity 13. Two overflow water outlets 17 are arranged at the same diameter and symmetrical position on the 0.8-meter-high horizontal surface of the barrel wall, serving as the clean water outlet after filtration through the entire device.

[0034] As shown in Figure 3 The quartz sand filter assembly 2 includes a first holding shell 21, a first supporting layer 22, and quartz sand filter material 23. The first holding shell is a cylindrical structure with a bottom and no cover, and its diameter is the same as that of the inner circular cylindrical cavity of the filter structural body. The shell side wall is 2 meters high, and the inner surface is treated to have a rough texture. The shell bottom is provided with a first hollow hole 24 with a diameter not greater than 2 mm. The shell side wall top end is bent outward and downward to form a first U-shaped ear 25, which is used for slot connection with the structural body. The size of the first U-shaped ear should be adapted to the position of the connecting groove of the structural body. The first U-shaped ear top end has two first lifting hook seats 26 at symmetrical positions relative to the center of the circle, which are used for external connection of lifting equipment or lifting equipment. The lifting hook seat is S-shaped, and the bottom surface is fixed to the quartz sand filter assembly by bolts, and the top surface center is provided with a hole. A layer of rubber sleeve 5 is attached to the outer surface of the shell side wall extending to the U-shaped ear, which is used to seal the gap between the quartz sand filter assembly and the filter structural body and the gap in the connecting slot, plays a role in waterproofing and fixing, and also prevents the assembly from twisting. A limiting ring 27 is protruded into the internal space at a height of 1.9 meters from the inside of the shell side wall, which is used to support the water inlet distributor. The limiting ring and the shell side wall are integrally formed and cast. The first holding shell cavity is sequentially filled with quartz sand homogeneous filter material and a first supporting layer from top to bottom. The quartz sand homogeneous filter material is quartz sand with a particle size of 1-2 mm, and the height is 0.7 meters. The first supporting layer is 2-4 mm gravel, and the height is 0.1 meters.

[0035] As shown in Figure 4As shown, the activated carbon filter assembly 3 includes a second containing shell 31, a second supporting layer 32 and activated carbon filter material 33. The second containing shell is a bottomed annular body structure, the ring width is the same as the outer ring cavity of the filter structure body, the shell side wall is 2 meters high, and the inner surface is treated to have a rough texture. The bottom of the shell is provided with a second hollow hole 34, and the second hollow hole diameter is not greater than 2 mm. The side of the second containing shell is provided with a through hole 35 corresponding to the overflow water outlet, and the top end of the side wall of the second containing shell is bent outward and downward to form a second U-shaped hanging ear 36, which is used for slot connection with the structure body. The second U-shaped hanging ear should be matched with the position of the connecting groove of the structure body. The second U-shaped hanging ear end is symmetrically located relative to the center of the circle, and there are two second hoisting hook connection seats 37, which are used for external connection of hoisting equipment or lifting equipment. The hoisting hook connection seat is S-shaped, the bottom is fixed to the activated carbon filter assembly by bolts, and the top center is provided with a hole. A layer of rubber sleeve pad 5 is attached to the outer surface of the side wall of the second containing shell and extends to the U-shaped hanging ear, which is used for sealing the gap between the activated carbon filter assembly and the filter structure body and the gap in the connecting slot, plays a role of waterproofing and fixing, and also prevents the assembly from being twisted. The inner cavity of the second containing shell is sequentially laid with activated carbon homogeneous filter material and a second supporting layer from top to bottom. The activated carbon homogeneous filter material is quartz sand with a particle size of 1-2 mm, and the height is 0.5 meters. The supporting layer is gravel with a particle size of 2-4 mm, and the height is 0.1 meters.

[0036] A liquid level sensor 6 is arranged on the inner wall of the first containing shell. The liquid level sensor is fixed to the inner surface of the quartz sand assembly containing shell at a height of 1.8 meters and is connected to the automatic control equipment outside the filter.

[0037] As shown in Figure 5 The main body of the water inlet distributor 4 is a cylindrical body with a height of 0.1 meters and a diameter equal to the inner diameter of the quartz sand filter. A hole is formed in the center of the top plate of the water inlet distributor as a water inlet 41, and a water inlet pipe is screwed to the water inlet. The bottom plate of the water inlet distributor is provided with water passing holes 42, and each water passing hole has an equal area. The water passing holes are distributed in a staggered manner like a plum blossom, and the total area of the water passing holes accounts for no more than 40% of the total area of the bottom plate. The central position of the bottom plate of the water inlet distributor is not provided with a water passing hole. A rubber sleeve pad 5 is attached to the outer surface of the side wall of the water inlet distributor, which is used for tightly fixing the water inlet distributor to the quartz sand filter assembly. The top end of the water inlet distributor is symmetrically located relative to the center of the circle, and there are two third hoisting hook connection seats 43, which are used for external connection of hoisting equipment or lifting equipment. The hoisting hook connection seat is S-shaped, the bottom is fixed to the water inlet distributor by bolts, and the top center is provided with a hole.

[0038] The heights of the components of the filter are relatively fixed, and the design filtering capacity is met by adjusting the radius size in the horizontal direction, but the total radius of the filter body structure should not exceed 2 meters.

[0039] Working principle:

[0040] AsFigure 1 and Figure 6 As shown in the figure, before starting, the module installation is needed, first, the quartz sand filter assembly 2 and the activated carbon filter assembly 3 are installed and fixed on the structure main body 1 in the slot way, in this process, the limiting strip and the limiting groove should be aligned, then the quartz sand filter material and the activated carbon filter material are respectively placed into the quartz sand filter assembly and the activated carbon filter assembly cavity, then the water level sensor 6 is fixed at the specified height of the inner surface of the quartz sand filter assembly side wall, finally, the water inlet distributor is horizontally lowered into the quartz sand filter assembly cavity until the limiting ring stops.

[0041] The water inlet can adopt the water pump pressure water inlet mode, the raw water is uniformly distributed by the water inlet distributor 4 on the horizontal plane to enter the quartz sand filter material 23, under the action of gravity, it passes through the quartz sand filter layer downward, accumulates at the bottom of the main body structure, and is scattered to the outer ring through the uniformly distributed overflow holes 16. Under the water head pressure from the quartz sand filter assembly 2, the activated carbon filter material 33 flows from bottom to top, and the water is accumulated on the surface of the annular activated carbon filter material until it reaches the height of the overflow water outlet 17, and then it leaves the filter through two symmetrically arranged overflow water outlets to complete the filtration process. In the whole process, the water inlet end, the first and second filtration transition end and the water outlet end are designed and optimized for the uniform distribution of water body, so as to avoid the occurrence of short flow as much as possible, and the pollution capacity in the filter material layer is more uniform, and the utilization of filter material is more sufficient.

[0042] With the increase of the working time of the filter, the water head loss formed by the two-stage filter material gradually increases, and the water level on the quartz sand filter layer will also increase, when the water level reaches the height of the water level sensor, the sensor action is triggered, and the water inlet is stopped to enter the filter replacement process. When replacing, the lifting equipment is first connected with the hooking seat on the water inlet distributor, the water inlet distributor is moved upward, then the lifting equipment is connected with the hooking seat on the top of the quartz sand filter assembly and the activated carbon filter assembly respectively, the two filter assemblies are moved upward, the replacement of the two filter materials is completed outside the filter, and then the components are sequentially installed into the filter main body structure according to the installation method before starting to enter the next cycle of filtration work.

[0043] The filter makes innovative optimization in the filter material arrangement form, filter material renewal and regeneration mode, connection and fixing mode between components and functional component structure, improves the utilization rate and space accommodation rate of filter material, reduces the adverse effect of the first-stage filter material on the second-stage filter material, and prolongs the effective working time; the flow state distribution in the filter and the pollution distribution in the filter material are more uniform, which effectively reduces the generation of adverse flow state; at the same time, the filter structure is more simple, and the operation is more simple, so that the equipment can be more flexibly adjusted according to the flow demand in design and manufacturing, and is more suitable for small projects, thereby being beneficial to market promotion and application.

[0044] The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application.

Claims

1. A small-scale filter for advanced purification of sewage water with two-stage homogeneous distribution of filter material inside and outside, characterized in that: The filter includes a structural body, a quartz sand filtering assembly, an activated carbon filtering assembly and a water inlet distributor. The structural body is a cylindrical structure with a bottom and without a top cover, and an annular isolation belt is arranged in the structural body to divide the structural body into an inner cylindrical cavity and an outer annular cavity. The quartz sand filtering assembly is inserted into the inner cylindrical cavity, and the activated carbon filtering assembly is inserted into the outer annular cavity. The water inlet distributor is installed at the top of the inner cylindrical cavity.

2. The dual-stage homogeneous filter media internal-external distribution small sewage depth purification filter according to claim 1, characterized in that: A connecting groove is arranged around the top of the structural body.

3. The double-stage homogeneous filter media internal and external distribution small sewage depth purification filter according to claim 2, characterized in that: The quartz sand filtering assembly includes a first containing shell, a first supporting layer and quartz sand filtering material.

4. The double-stage homogeneous filter according to claim 3, characterized in that: The quartz sand filtering material is quartz sand with a particle size of 1-2 mm and a height of 0.7 m.

5. The dual-stage homogeneous filter media internal-external distribution small-sized sewage depth purification filter according to claim 3, characterized in that: A limiting ring is arranged above the inner wall of the first containing shell to support the water inlet distributor.

6. The dual-stage homogeneous filter media internal-external distribution small-sized sewage depth purification filter according to claim 3, characterized in that: A liquid level sensor is arranged on the inner wall of the first containing shell.

7. The dual-stage homogeneous filter media internal-external distribution small-sized sewage depth purification filter according to claim 2, characterized in that: The activated carbon filtering assembly includes a second containing shell, a second supporting layer and activated carbon filtering material.

8. The double-stage homogeneous filter media internal-external distribution small sewage depth purification filter according to claim 7, characterized in that: The activated carbon filtering material is activated carbon with a particle size of 1-2 mm and a height of 0.5 m.

9. The dual-stage homogeneous filter media-in-filter sewage advanced purification small filter according to claim 1, characterized in that: The water inlet distributor is a cylindrical body with a height of 0.1 m and a diameter equal to the inner diameter of the quartz sand filter.

10. The dual-stage homogeneous filter media internal-external distribution small-scale sewage advanced purification filter according to claim 1, characterized in that: The top plate of the water inlet distributor is provided with a hole as a water inlet, and a water inlet pipe is screwed to the water inlet. The bottom plate is provided with water passing holes, and the total area of the water passing holes accounts for no more than 40% of the total area of the bottom plate. The bottom plate is not provided with a water passing hole at the center position. The outer surface of the side wall of the water inlet distributor is attached with a rubber sleeve for tightly fixing the water inlet distributor to the quartz sand filtering assembly. The quartz sand filtering assembly, the activated carbon filtering assembly and the water inlet distributor are each provided with two lifting hook seats at the symmetrical positions relative to the center of the top end for connecting a hoisting device or a lifting device.

Images