A quartz sand wastewater treatment device

Abstract

The application provides a quartz sand wastewater treatment device, and relates to the technical field of wastewater treatment, which comprises a hydrocyclone and a quartz sand filter, a buffer tank is arranged between the hydrocyclone and the quartz sand filter, a water outlet of the hydrocyclone is connected with a water inlet of the buffer tank through a first pipeline, an overflow pipe that is in communication with the inside of the buffer tank is fixed to the top of the buffer tank, one side of the overflow pipe is connected with a water inlet of the quartz sand filter through a second pipeline, a blowdown port is arranged at the bottom of the buffer tank, and a blowdown valve is arranged at the blowdown port; the buffer tank is arranged between the hydrocyclone and the quartz sand filter, most of coarse particles and part of fine particles in the wastewater can be removed in advance through pretreatment of the hydrocyclone and sedimentation of the buffer tank, the sand concentration of the wastewater entering the filter is effectively reduced, the deposition of the filter layer sand material is reduced from the source, the plugging is delayed, the filtration resistance is reduced, and the stable operation of the system is ensured, meanwhile, the cleaning frequency of the filter layer is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and more specifically, to a quartz sand wastewater treatment device. Background Technology

[0002] Quartz sand, a basic industrial raw material with high silicon content, excellent chemical stability, and mechanical strength, is widely used in glass manufacturing, photovoltaic crucible production, ceramic firing, and water treatment filter media, serving as a key material supporting both traditional industries and high-end manufacturing. However, the mining, crushing, grinding, acid washing, purification, and deep processing of quartz sand generate a large amount of industrial wastewater.

[0003] Currently, in the treatment of quartz sand wastewater, quartz sand filtration is a crucial step in achieving water purification. Existing filtration devices are prone to filter bed clogging when treating high-concentration sand-containing wastewater, leading to increased filtration resistance, decreased filtration efficiency, and the need for frequent cleaning of the quartz sand filter bed, thus increasing equipment maintenance costs. Summary of the Invention

[0004] The purpose of this application is to provide a quartz sand wastewater treatment device that can solve the technical problems mentioned in the background art.

[0005] This application provides a quartz sand wastewater treatment device, including a hydrocyclone and a quartz sand filter. A buffer tank is provided between the hydrocyclone and the quartz sand filter. The outlet of the hydrocyclone is connected to the inlet of the buffer tank through a first pipe. An overflow pipe communicating with the inside of the buffer tank is fixedly provided on the top of the buffer tank. One side of the overflow pipe is connected to the inlet of the quartz sand filter through a second pipe. A drain outlet is provided at the bottom of the buffer tank, and a drain valve is provided at the drain outlet.

[0006] Furthermore, the lower end of the overflow pipe extends into the buffer tank, and the top of the overflow pipe is detachably provided with a matching end cap. A filter assembly is provided inside the overflow pipe, and the filter assembly includes a connecting rod, a filter frame, and a filter screen. The upper end of the connecting rod is fixedly inserted through the end cap, the filter frame is connected to the lower part of the connecting rod, and the filter screen is fixed on the filter frame. The size of the filter frame is adapted to the inner diameter of the overflow pipe.

[0007] Furthermore, a support ring is provided at the inner bottom of the overflow pipe, and a sealing ring is fixed at the bottom of the filter frame, with the sealing ring abutting against the top of the support ring.

[0008] Furthermore, the filter frame is detachably connected to the lower part of the connecting rod, the lower part of the connecting rod is provided with a connecting thread, and the middle part of the filter frame is provided with a threaded hole that matches the connecting thread. The connecting rod is threadedly connected to the filter frame through the connecting thread.

[0009] Furthermore, the connecting rod is a hollow tube with an opening at the top, and a backflush tube communicating with the interior of the connecting rod is fixedly provided on the lower side of the connecting rod. The backflush tube has a plurality of nozzles with openings facing the filter screen.

[0010] Furthermore, multiple backflush tubes are provided, and the multiple backflush tubes are evenly arranged along the periphery of the connecting rod.

[0011] Furthermore, the nozzle is arranged in a trumpet shape.

[0012] Furthermore, a backflow valve is provided on the upper part of the connecting rod above the end cap, and a pipe connector is provided at the upper end of the connecting pipe.

[0013] The beneficial effects of this utility model are:

[0014] This invention incorporates a buffer tank between the hydrocyclone and the quartz sand filter. The hydrocyclone pre-treats the quartz sand wastewater, while the buffer tank settles it. This process removes most of the coarse particles and some of the fine sand particles from the wastewater, effectively reducing the sand concentration in the wastewater entering the quartz sand filter. This reduces sand deposition in the filter layer from the source, delays filter layer clogging, lowers filtration resistance, ensures long-term stable operation of the filtration system, reduces the frequency of filter layer cleaning, and lowers equipment maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0017] Figure 2 This is a cross-sectional view of a buffer tank in some embodiments of this application;

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 This is a schematic diagram of the structure of the filtering component in some embodiments of this application;

[0020] The reference numerals in the attached figures are as follows:

[0021] 1. Hydrocyclone; 2. Quartz sand filter; 3. Buffer tank; 4. First pipe; 5. Overflow pipe; 51. Support ring; 6. Second pipe; 7. Drain valve; 8. End cap; 9. Filter assembly; 91. Connecting rod; 92. Filter frame; 93. Filter screen; 10. Sealing ring; 11. Backflush pipe; 111. Nozzle; 12. Backflush valve; 13. Pipe connector; 14. Shut-off valve. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific Implementation

[0028] like Figure 1-4 As shown, this application provides a quartz sand wastewater treatment device, including a hydrocyclone 1 and a quartz sand filter 2. A buffer tank 3 is provided between the hydrocyclone 1 and the quartz sand filter 2. The outlet of the hydrocyclone 1 is connected to the inlet of the buffer tank 3 through a first pipe 4. An overflow pipe 5 communicating with the inside of the buffer tank 3 is fixedly installed on the top of the buffer tank 3. One side of the overflow pipe 5 is connected to the inlet of the quartz sand filter 2 through a second pipe 6. A drain outlet with a drain valve 7 is provided at the bottom of the buffer tank 3. In use, sand-containing wastewater enters the hydrocyclone 1 from the inlet of the hydrocyclone 1. The hydrocyclone 1 uses centrifugal force to separate most of the high-concentration coarse sand particles in the wastewater from the water, completing the preliminary sand removal pretreatment. Subsequently, the pretreated wastewater flows into the buffer tank 3 through the first pipe 4, where the water flow velocity is stabilized and buffered. Simultaneously, the remaining fine sand particles in the wastewater are deposited to the bottom of the tank under gravity, while the clearer wastewater at the top flows out through the overflow pipe 5 at the top of the buffer tank 3 and enters the quartz sand filter 2 through the second pipe 6. Further purification is achieved through filtration of the filter layer inside the quartz sand filter 2. During this process, the sand deposited at the bottom of the buffer tank 3 can be discharged from the drain outlet by opening the drain valve 7. This device uses the hydrocyclone 1 to pre-treat the quartz sand wastewater and the buffer tank 3 to settle the quartz sand wastewater, which can remove most of the coarse particles and some fine sand particles in the wastewater in advance, effectively reducing the sand concentration in the wastewater entering the quartz sand filter 2. This reduces the deposition of sand in the filter layer of the quartz sand filter 2 from the source, delays filter layer clogging, reduces filtration resistance, ensures long-term stable operation of the filtration system, reduces the cleaning frequency of the filter layer of the quartz sand filter 2, and reduces equipment maintenance costs.

[0029] like Figure 2-4As shown, the lower end of the overflow pipe 5 extends into the buffer tank 3. A suitable end cap 8 is detachably provided on the top of the overflow pipe 5. A filter assembly 9 is provided inside the overflow pipe 5. The filter assembly 9 includes a connecting rod 91, a filter frame 92, and a filter screen 93. The upper end of the connecting rod 91 is fixedly connected through the end cap 8. The filter frame 92 is connected to the lower part of the connecting rod 91, and the filter screen 93 is fixed on the filter frame 92. The size of the filter frame 92 is adapted to the inner diameter of the overflow pipe 5. Specifically, a connecting flange is provided at the upper end of the overflow pipe 5, and the end cap 8 is connected to the flange of the overflow pipe 5. When the pre-treated wastewater in the buffer tank 3 flows upward to the inlet of the overflow pipe 5... When the wastewater passes through the mesh of the filter screen 93, the fine impurities remaining in the wastewater are intercepted by the filter screen 93. The wastewater that meets the filtration requirements flows into the subsequent quartz sand filter 2 through the overflow pipe 5 and the second pipe 6. When it is necessary to clean or replace the filter component 9, the detachable end cover 8 can be removed, and the filter frame 92 and the filter screen 93 can be taken out together through the connecting rod 91 to complete the impurity cleaning or component maintenance. The first pipe 4 and the second pipe 6 are equipped with shut-off valves 14, which can flexibly control the flow rate of wastewater delivered from the hydrocyclone 1 to the buffer tank 3 and the flow rate of wastewater delivered from the buffer tank 3 to the quartz sand filter 2.

[0030] like Figure 2 As shown, the bottom of the overflow pipe 5 is provided with a support ring 51, and the bottom of the filter frame 92 is fixed with a sealing ring 10, which abuts against the top of the support ring 51. When the filter frame 92 equipped with the filter screen 93 is placed into the overflow pipe 5 through the connecting rod 91, the sealing ring 10 at the bottom of the filter frame 92 will abut tightly against the top of the support ring 51 to form a sealing fit, preventing unfiltered wastewater from directly entering the subsequent process.

[0031] like Figure 3 As shown, the filter frame 92 is detachably connected to the lower part of the connecting rod 91. The lower part of the connecting rod 91 is provided with a connecting thread, and the middle part of the filter frame 92 is provided with a threaded hole that matches the connecting thread. The connecting rod 91 is threadedly connected to the filter frame 92 through the connecting threaded hole. The detachable design allows the filter frame 92 and the connecting rod 91 to be separated separately. When the filter screen 93 is damaged due to long-term use and needs to be replaced, it is not necessary to replace the entire filter assembly 9. Only the old filter frame 92 needs to be removed and replaced with a new one, which reduces the cost of consumables.

[0032] like Figure 2-4As shown, the connecting rod 91 is a hollow tube with an opening at the top. A backwash pipe 11, which communicates with the interior of the connecting rod 91, is fixed to the lower side of the connecting rod 91. The backwash pipe 11 has multiple nozzles 111 with openings facing the filter screen 93. When it is necessary to clean the impurities trapped on the filter screen 93, backwashing medium (such as high-pressure water) can be introduced into the hollow tube through the opening at the top of the connecting rod 91. The backwashing medium flows along the internal channel of the connecting rod 91 to the backwash pipe 11, and then is evenly sprayed onto the surface of the filter screen 93 through the multiple nozzles 111 on the backwash pipe 11. The sprayed backwashing medium will impact the impurities attached to the filter screen 93, peeling the impurities off the surface of the filter screen 93, thus achieving backwashing cleaning of the filter screen 93. The cleaned impurities can be discharged from the drain port at the bottom of the buffer tank 3 along with the flushing waste liquid. Cleaning can be achieved without frequent disassembly of the filter assembly 9 or frequent replacement of the filter screen 93 due to impurities clogging.

[0033] like Figure 4 As shown, there are multiple backflush pipes 11, which are evenly arranged along the periphery of the connecting rod 91. Specifically, there are three rows of nozzles 111, with an included angle of 45° between two adjacent rows of nozzles 111, which can expand the spray range of the backflush medium and increase the cleaning coverage area of ​​the filter screen 93.

[0034] like Figure 3 As shown, the nozzle 111 is flared; the flared structure causes the backwash medium to form a diffuse jet stream during the spraying process, which further increases the contact area between the backwash medium and the filter screen 93 and improves the rinsing effect.

[0035] like Figure 2 and Figure 4 As shown, a backwash valve 12 is provided on the upper part of the connecting rod 91 above the end cap 8, and a pipe connector 13 is provided on the upper end of the connecting pipe; the pipe connector 13 is connected to the backwash medium input source through an external pipe, and the backwash valve 12 can control the flow of the backwash medium.

[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A quartz sand wastewater treatment device, characterized in that: The device includes a hydrocyclone and a quartz sand filter. A buffer tank is provided between the hydrocyclone and the quartz sand filter. The outlet of the hydrocyclone is connected to the inlet of the buffer tank through a first pipe. An overflow pipe communicating with the inside of the buffer tank is fixed on the top of the buffer tank. One side of the overflow pipe is connected to the inlet of the quartz sand filter through a second pipe. A drain outlet is provided at the bottom of the buffer tank, and a drain valve is provided at the drain outlet.

2. The quartz sand wastewater treatment device according to claim 1, characterized in that: The lower end of the overflow pipe extends into the buffer tank. The top of the overflow pipe is detachably provided with a matching end cap. A filter assembly is provided inside the overflow pipe. The filter assembly includes a connecting rod, a filter frame, and a filter screen. The upper end of the connecting rod is fixedly inserted through the end cap. The filter frame is connected to the lower part of the connecting rod. The filter screen is fixed on the filter frame. The size of the filter frame is adapted to the inner diameter of the overflow pipe.

3. The quartz sand wastewater treatment device according to claim 2, characterized in that: The overflow pipe has a support ring at its inner bottom, and the filter frame has a sealing ring fixed at its bottom, with the sealing ring abutting against the top of the support ring.

4. The quartz sand wastewater treatment device according to claim 2, characterized in that: The filter frame is detachably connected to the lower part of the connecting rod. The lower part of the connecting rod is provided with a connecting thread, and the middle part of the filter frame is provided with a threaded hole that matches the connecting thread. The connecting rod is threadedly connected to the filter frame through the connecting thread.

5. The quartz sand wastewater treatment device according to claim 4, characterized in that: The connecting rod is a hollow tube with an opening at the top. A backflush tube communicating with the interior of the connecting rod is fixed to the lower side of the connecting rod. The backflush tube has multiple nozzles with openings facing the filter screen.

6. The quartz sand wastewater treatment device according to claim 5, characterized in that: The recoil tubes are provided in multiple quantities, and the multiple recoil tubes are evenly arranged along the periphery of the connecting rod.

7. The quartz sand wastewater treatment device according to claim 6, characterized in that: The nozzle is arranged in a trumpet shape.

8. The quartz sand wastewater treatment device according to claim 5, characterized in that: The upper part of the connecting rod, located above the end cap, is provided with a backflow valve, and the upper end of the connecting pipe is provided with a pipe connector.

Images