A high-salinity wastewater pretreatment device

Abstract

The utility model provides a kind of high salt wastewater pretreatment device, belong to sewage treatment technical field, comprising: containing cylinder, mixing pipe and filter cylinder. Containing cylinder inside is equipped with isolation pipe, and containing cylinder inside is divided into first cavity and second cavity by isolation pipe. The side wall of isolation pipe is equipped with multiple flow guide holes, and flow guide connector is equipped on the side wall of containing cylinder. The bottom end of mixing pipe is inserted into first cavity inside, dosing connector and wastewater connector are equipped on the top end of mixing pipe, and liquid distribution head is equipped on the bottom end of mixing pipe. One end of filter cylinder is communicated with flow guide connector, other end is equipped with liquid outlet connector, first filter screen and second filter screen are equipped in filter cylinder, and blow-off connector is also equipped on the side wall of filter cylinder. The high salt wastewater pretreatment device of the utility model can improve the effect of chemical precipitation and reduce the frequency of cleaning and maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and in particular relates to a pretreatment device for high-salt wastewater. Background Technology

[0002] High-salinity wastewater refers to sewage with a salt content exceeding 1%, typically originating from various industries such as chemical processing, dyeing and printing, seawater desalination, and food processing. Direct discharge of high-salinity wastewater can easily lead to soil salinization and aquatic ecosystem collapse. Therefore, effective resource-based treatment of high-salinity wastewater is of great significance.

[0003] In existing technologies, the resource recovery treatment of high-salinity wastewater typically employs a combination of membrane desalination and evaporation crystallization to achieve zero discharge of pollutants and recycling of salt products. Before resource recovery, the high-salinity wastewater requires softening pretreatment to remove calcium and magnesium ions through chemical precipitation and filtration, preventing scaling on the membrane surface and evaporator inner walls. However, in existing softening pretreatment devices, the mixing effect between the high-salinity wastewater and the chemical precipitation agents is limited, resulting in poor precipitation quality. Furthermore, the filter components are easily clogged by precipitates, leading to frequent maintenance of the pretreatment device and consequently affecting the treatment efficiency of the high-salinity wastewater. Utility Model Content

[0004] In view of this, the present invention aims to provide a high-salinity wastewater pretreatment device to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A high-salinity wastewater pretreatment device includes: a receiving cylinder, a mixing pipe, and a filter cylinder; the receiving cylinder has an isolation pipe inside, dividing the interior of the receiving cylinder into a first cavity and a second cavity, the first cavity being located inside the isolation pipe and the second cavity being located outside the isolation pipe; the side wall of the isolation pipe has multiple guide holes, and the side wall of the receiving cylinder has a guide pipe connected to the second cavity, with the guide holes located above the guide pipe; the bottom end of the mixing pipe is inserted into the first cavity, and the mixing pipe... The filter cylinder is equipped with a dosing pipe and a wastewater pipe at the top, and a liquid distribution head at the bottom of the mixing pipe, which is located below the flow guide pipe. One end of the filter cylinder is connected to the flow guide pipe, and the other end is equipped with a liquid outlet pipe. Inside the filter cylinder, there is a first filter screen and a second filter screen. The first filter screen is located on the side of the second filter screen closer to the flow guide pipe, and the mesh diameter of the first filter screen is larger than that of the second filter screen. A sewage discharge pipe is also provided on the side wall of the filter cylinder, which is located on the side of the first filter screen closer to the flow guide pipe.

[0007] Furthermore, the liquid distribution head includes a support ring and a baffle plate. The support ring is disposed at the bottom end of the mixing tube, and the baffle plate is located below the support ring. The top surface of the baffle plate is connected to the bottom surface of the support ring through multiple guide vanes. The multiple guide vanes are arranged radially around the axis of the mixing tube, and a guide gap is provided between any two adjacent guide vanes.

[0008] Furthermore, the top surface of the baffle plate is provided with a tapered guide surface with the tip pointing upwards.

[0009] Furthermore, the receiving cylinder is provided with a first vent pipe and a second vent pipe, the first vent pipe being connected to the first cavity and the second vent pipe being connected to the second cavity.

[0010] Furthermore, the receiving cylinder includes a cylinder body and a cap. The cap is detachably disposed at the top of the cylinder body. The cap has an installation hole for receiving the mixing tube and an assembly ring groove for receiving the top of the isolation tube on the bottom surface of the cap.

[0011] Furthermore, a sealing boss is provided on the bottom surface of the cover, the outer diameter of the sealing boss is equal to the inner diameter of the cylinder, and the assembly ring groove is located on the bottom surface of the sealing boss.

[0012] Furthermore, the filter cylinder includes a first filter section, a tapered variable diameter section, and a second filter section connected in sequence. The first filter screen is located inside the first filter section, the second filter screen is located inside the second filter section, and the inner diameter of the first filter section is larger than the inner diameter of the second filter section.

[0013] Compared with existing technologies, the high-salinity wastewater pretreatment device of this utility model has the following advantages:

[0014] (1) The high-salinity wastewater pretreatment device of this utility model can divide the interior of the container into a first cavity and a second cavity through an isolation pipe. During use, wastewater and reagents are uniformly mixed through a distribution head and introduced into the first cavity. The mixture then undergoes chemical sedimentation in the first cavity and overflows into the second cavity through the guide holes. This provides sufficient reaction time for the chemical precipitation of high-salinity wastewater, improving the chemical precipitation effect. Furthermore, the device is equipped with a first filter screen and a second filter screen in the filter cylinder, enabling two-stage filtration of the mixture and enhancing the filtration effect. Simultaneously, the filter cylinder is also equipped with a drain pipe, allowing for timely discharge of filtered solids from the filter cylinder, reducing the frequency of maintenance and cleaning of the filter cylinder.

[0015] (2) The high-salt wastewater pretreatment device of the present invention includes a distribution head comprising multiple guide vanes arranged radially. When the mixture of wastewater and reagent enters the distribution head, the multiple guide vanes can make the mixture radially distributed, thereby improving the mixing effect between wastewater and reagent and improving the quality of chemical precipitation.

[0016] (3) The high-salt wastewater pretreatment device of this utility model has a conical variable diameter section inside the filter cylinder, and the mesh diameter of the first filter screen is larger than that of the second filter screen. In use, the conical variable diameter section can guide the solids intercepted by the second filter screen into the first filter section and leave the filter cylinder along the drain pipe, thereby improving the solids discharge effect of the filter cylinder. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a high-salinity wastewater pretreatment device according to an embodiment of the present invention;

[0019] Figure 2 This is an exploded view of a high-salinity wastewater pretreatment device according to an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of the receiving cylinder described in an embodiment of the present utility model;

[0021] Figure 4 This is a cross-sectional view of the filter cartridge described in an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the mixing tube and cap as described in an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 11-Cylinder body; 12-Flow guide pipe; 13-First drain pipe; 14-Second drain pipe; 15-Cap; 151-Sealing boss; 152-Assembly ring groove; 2-Isolation pipe; 21-Flow guide hole; 31-First cavity; 32-Second cavity; 4-Mixing pipe; 41-Dosing pipe; 42-Wastewater pipe; 51-Support ring; 52-Baffle plate; 53-Flow guide plate; 6-Filter cylinder; 61-First filtration section; 62-Conical diameter reducing section; 63-Second filtration section; 64-Liquid outlet pipe; 71-First filter screen; 72-Second filter screen; 8-Sewage discharge pipe. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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 of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] A high-salinity wastewater pretreatment device is used to chemically precipitate and filter high-salinity wastewater before it is subjected to resource recovery treatment. Figures 1-5 This is a schematic diagram of the high-salinity wastewater pretreatment device in this embodiment. As shown in the figure, the high-salinity wastewater pretreatment device includes: a container cylinder, a mixing pipe 4, and a filter cylinder 6. The mixing pipe 4 is used to achieve uniform mixing of wastewater and chemical agents, the container cylinder is used to provide a reaction site for chemical precipitation between wastewater and chemical agents, and the filter cylinder 6 is used to filter and intercept the solids formed by chemical precipitation.

[0030] It should be noted that the chemical precipitation in this embodiment refers to the softening process that reduces the hardness of high-salt wastewater by adding common chemical agents such as lime, sodium carbonate and sodium hydroxide to form solids. The specific reaction principle is well known and is not part of the inventive point of this application, so it will not be described in detail here.

[0031] Specifically, in this embodiment, the container is equipped with an isolation pipe 2, which divides the interior of the container into a first cavity 31 and a second cavity 32. The first cavity 31 is located inside the isolation pipe 2, and the second cavity 32 is located outside the isolation pipe 2. Multiple guide holes 21 are also provided on the side wall of the isolation pipe 2 to facilitate communication between the first cavity 31 and the second cavity 32. The bottom end of the mixing pipe 4 is inserted into the first cavity 31. The top end of the mixing pipe 4 is equipped with a dosing connector 41 for adding chemicals and a wastewater connector 42 for introducing high-salt wastewater. The bottom end of the mixing pipe 4 is equipped with a distribution head for mixing the chemicals and high-salt wastewater. In use, the chemicals and high-salt wastewater enter the first cavity 31 along the mixing pipe 4 and the distribution head, thus initiating the chemical precipitation of the high-salt wastewater. As materials (chemical reagents and high-salinity wastewater) are continuously injected, the liquid level inside the first cavity 31 gradually rises until it reaches the position of the guide hole 21. At this point, the mixture overflows into the second cavity 32. This provides sufficient reaction time for the chemical precipitation process, thereby improving the chemical precipitation effect of the high-salinity wastewater.

[0032] Optionally, to improve the mixing uniformity between the reagent and the high-salinity wastewater, such as... Figure 5 As shown, the distribution head may include a support ring 51 and a baffle plate 52. The support ring 51 is located at the bottom end of the mixing pipe 4, and the baffle plate 52 is located below the support ring 51. The top surface of the baffle plate 52 is connected to the bottom surface of the support ring 51 via multiple guide vanes 53. The multiple guide vanes 53 are arranged radially around the axis of the mixing pipe 4, and a flow guide gap is provided between any two adjacent guide vanes 53. When the mixture of the reagent and the high-salinity wastewater enters the distribution head, the mixture impacts the baffle plate 52. Because the multiple guide vanes 53 are arranged radially and there are flow guide gaps between adjacent guide vanes 53, the mixture flows radially under the guidance of the multiple guide vanes 53. In this process, the reagent and the high-salinity wastewater can be fully and uniformly mixed, thereby achieving a better chemical sedimentation effect for the high-salinity wastewater.

[0033] In addition, to improve the flow guiding capacity of the liquid distribution head, a conical guide surface with the tip pointing upward can be provided on the top surface of the baffle plate 52, thereby improving the efficiency of the mixture leaving the liquid distribution head and further enhancing the mixture dispersion effect of the liquid distribution head.

[0034] As an optional implementation of this embodiment, since the chemical precipitation process generates a large amount of solid matter, to improve the ease of cleaning the solid matter inside the container, the container may be equipped with a first venting pipe 13 and a second venting pipe 14. The first venting pipe 13 is connected to the first cavity 31, and the second venting pipe 14 is connected to the second cavity 32. It should be noted that when this device is in operation, the first venting pipe 13 and the second venting pipe 14 should be closed by valves. When it is necessary to clean the container, the operator can open the valves on the first venting pipe 13 and the second venting pipe 14, thereby venting the solid matter inside the first cavity 31 through the first venting pipe 13 and venting the solid matter inside the second cavity 32 through the second venting pipe 14.

[0035] In addition, to further improve the ease of cleaning the container, the container in this embodiment may include a cylinder body 11 and a cap 15, and the cap 15 is detachably disposed at the top of the cylinder body 11. It should be noted that the cap 15 should be provided with an installation hole for accommodating the mixing tube 4, so as to facilitate the installation of the mixing tube 4. At the same time, the bottom surface of the cap 15 should also be provided with an assembly ring groove 152 for accommodating the top end of the isolation tube 2, so as to prevent the material inside the first cavity 31 from entering the second cavity 32 through the gap between the cap 15 and the isolation tube 2.

[0036] Optionally, to improve the sealing effect between the cover 15 and the cylinder 11, a sealing boss 151 may be provided on the bottom surface of the cover 15, and the outer diameter of the sealing boss 151 is equal to the inner diameter of the cylinder 11. The assembly annular groove 152 is located on the bottom surface of the sealing boss 151. After the cover 15 and the cylinder 11 are assembled, the outer wall of the sealing boss 151 will fit against the inner wall of the cylinder 11, so that the material inside the cylinder 11 will leak out along the splicing gap.

[0037] After chemical precipitation is completed inside the container, the mixture enters the filter cartridge 6. To achieve communication between the filter cartridge 6 and the container, a flow guide pipe 12 is provided on the side wall of the container, with the flow guide hole 21 located above the flow guide pipe 12 and the liquid distribution head located below the flow guide pipe 12. During assembly, one end of the filter cartridge 6 is connected to the flow guide pipe 12 to allow the mixture to enter the filter cartridge 6, while the other end of the filter cartridge 6 is provided with a liquid outlet pipe 64 to allow the filtered material to enter subsequent equipment.

[0038] To achieve the solid matter interception effect of the filter cartridge 6, a first filter screen 71 and a second filter screen 72 are provided inside the filter cartridge 6. The first filter screen 71 is located on the side of the second filter screen 72 closer to the flow guide pipe 12, and the mesh diameter of the first filter screen 71 is larger than that of the second filter screen 72. When a mixture containing solid matter flows through the filter cartridge 6, the first filter screen 71 and the second filter screen 72 can perform two-stage filtration of the mixture, thereby achieving a good filtration effect and preventing solid matter from entering subsequent equipment. In addition, to prevent the presence of solid matter from causing blockage inside the filter cartridge 6, this embodiment also provides a drain pipe 8 on the side wall of the filter cartridge 6, and the drain pipe 8 is located on the side of the first filter screen 71 closer to the flow guide pipe 12. During use, the operator can close the drain pipe 8 through the valve and periodically open the valve on the drain pipe 8 to promptly discharge the solid matter inside the filter cartridge 6, reducing the frequency of cleaning and maintenance of the filter cartridge 6.

[0039] Optionally, to improve the solids discharge effect of filter cartridge 6, such as... Figure 4 As shown, the filter cylinder 6 includes a first filter section 61, a tapered variable diameter section 62, and a second filter section 63 connected in sequence. The first filter screen 71 is located inside the first filter section 61, and the second filter screen 72 is located inside the second filter section 63. The inner diameter of the first filter section 61 is larger than the inner diameter of the second filter section 63. Because the mesh diameter of the first filter screen 71 is larger than that of the second filter screen 72, and because the filter cylinder 6 has a tapered variable diameter section 62, smaller solid particles, after being intercepted by the second filter screen 72, can move along the mesh of the first filter screen 71 into the first filter section 61 during the venting process, and finally leave the filter cylinder 6 along the drain pipe 8, thereby improving the solid particle venting capacity of the filter cylinder 6.

[0040] The effects of the above solution are explained below:

[0041] This embodiment provides a high-salinity wastewater pretreatment device that enhances the mixing effect of the reagent and the high-salinity wastewater through a distribution head, and allows the mixture sufficient reaction time inside the container to achieve a good chemical precipitation effect. Furthermore, this device can perform two-stage filtration of the mixture through a filter cartridge and promptly discharge solids, thereby reducing the frequency of filter cartridge cleaning and maintenance.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-salinity wastewater pretreatment device, characterized in that, include: The container includes a container cylinder, a mixing tube (4), and a filter cylinder (6). The container cylinder has an isolation tube (2) inside, which divides the interior of the container cylinder into a first cavity (31) and a second cavity (32). The first cavity (31) is located inside the isolation tube (2), and the second cavity (32) is located outside the isolation tube (2). The isolation tube (2) has multiple guide holes (21) on its sidewall, and a guide pipe (12) is provided on the sidewall of the container cylinder. The guide pipe (12) is connected to the second cavity (32), and the guide holes (21) are located above the guide pipe (12). The bottom end of the mixing tube (4) is inserted into the first cavity (31), and a dosing pipe (6) is provided at the top end of the mixing tube (4). 41) and wastewater inlet (42), a liquid distribution head is provided at the bottom end of the mixing pipe (4), and the liquid distribution head is located below the guide pipe (12); one end of the filter cylinder (6) is connected to the guide pipe (12), and the other end is provided with a liquid outlet pipe (64). A first filter screen (71) and a second filter screen (72) are provided inside the filter cylinder (6). The first filter screen (71) is located on the side of the second filter screen (72) close to the guide pipe (12), and the mesh diameter of the first filter screen (71) is larger than the mesh diameter of the second filter screen (72); a sewage outlet pipe (8) is also provided on the side wall of the filter cylinder (6), and the sewage outlet pipe (8) is located on the side of the first filter screen (71) close to the guide pipe (12).

2. The high-salinity wastewater pretreatment device according to claim 1, characterized in that: The liquid distribution head includes a support ring (51) and a baffle plate (52). The support ring (51) is located at the bottom end of the mixing pipe (4). The baffle plate (52) is located below the support ring (51), and the top surface of the baffle plate (52) is connected to the bottom surface of the support ring (51) through multiple guide vanes (53). The multiple guide vanes (53) are arranged radially on the periphery of the axis of the mixing pipe (4), and a guide gap is provided between any two adjacent guide vanes (53).

3. The high-salinity wastewater pretreatment device according to claim 2, characterized in that: The top surface of the baffle plate (52) is provided with a tapered guide surface with the tip pointing upwards.

4. The high-salinity wastewater pretreatment device according to claim 1, characterized in that: The container cylinder is provided with a first vent pipe (13) and a second vent pipe (14). The first vent pipe (13) is connected to the first cavity (31), and the second vent pipe (14) is connected to the second cavity (32).

5. The high-salinity wastewater pretreatment device according to claim 1, characterized in that: The container includes a cylinder (11) and a cover (15). The cover (15) is detachably disposed at the top of the cylinder (11). The cover (15) has an installation hole for accommodating the mixing tube (4) and an assembly ring groove (152) for accommodating the top of the isolation tube (2) on the bottom surface of the cover (15).

6. The high-salinity wastewater pretreatment device according to claim 5, characterized in that: The bottom surface of the cover (15) is provided with a sealing boss (151), the outer diameter of the sealing boss (151) is equal to the inner diameter of the cylinder (11), and the assembly ring groove (152) is located on the bottom surface of the sealing boss (151).

7. The high-salinity wastewater pretreatment device according to claim 1, characterized in that: The filter cylinder (6) includes a first filter section (61), a tapered variable diameter section (62), and a second filter section (63) connected in sequence. The first filter screen (71) is located inside the first filter section (61), and the second filter screen (72) is located inside the second filter section (63). The inner diameter of the first filter section (61) is larger than the inner diameter of the second filter section (63).

Images