Wastewater crystallization treatment device

Abstract

The utility model relates to a wastewater crystallization treatment device, and belongs to the technical field of water treatment.The device comprises an inner barrel and an outer barrel, a backflow cavity is reserved between the inner barrel and the outer barrel, a mixing cavity is formed in the inner barrel, and the mixing cavity is communicated with the backflow cavity; a water inlet, a medicine inlet and an air inlet are formed in the bottom of the outer barrel, the water inlet is communicated with the wastewater pool through a water pipe, the medicine inlet is communicated with the medicine pool through a medicine pipe, the air inlet is communicated with an air pump through an air pipe, and the water inlet, the medicine inlet and the air inlet are all communicated with the mixing cavity; an aeration disc is arranged on the inner wall of the mixing cavity, the aeration disc is located below the water inlet and the medicine inlet and communicates with the air inlet, and a plurality of air outlet holes are formed in the side wall, facing the top of the inner barrel, of the aeration disc. Therefore, the purpose of purifying the wastewater is achieved, and the effect of improving the wastewater purification degree is achieved.

Description

Technical Field

[0001] This application relates to the field of water treatment technology, and in particular to a wastewater crystallization treatment device. Background Technology

[0002] In special scenarios such as livestock farming, food processing, and synthetic ammonia industry, the discharged wastewater contains high concentrations of ammonia nitrogen, phosphates, and other pollutants. Direct discharge would pollute the environment, so it is necessary to purify the wastewater before discharge or recycle it.

[0003] Currently, adsorption, chemical precipitation, and induced crystallization are commonly used to treat pollutants such as ammonia nitrogen and phosphate in wastewater. However, these methods all have certain drawbacks. For example, adsorption requires specialized equipment, and its effectiveness is often insufficient for adsorbing multiple types of pollutants. Chemical precipitation produces large amounts of precipitated sludge, which is difficult to recycle. Induced crystallization is similar to chemical precipitation, involving the addition of a precipitant to cause pollutants to settle. This method not only consumes large amounts of precipitant, resulting in high energy consumption when mixing wastewater and precipitant, but also requires adjusting the amount of precipitant added based on the sedimentation effect. It is an intermittent operation, complex to operate, and due to varying individual experience, it is difficult to guarantee the correct dosage of precipitant, leading to inconsistent sedimentation quality.

[0004] Therefore, a new wastewater treatment device is urgently needed. Summary of the Invention

[0005] In order to improve the purification level of pollutants in wastewater, this application provides a wastewater crystallization treatment device.

[0006] This application provides a wastewater crystallization treatment device, which includes an inner cylinder and an outer cylinder, with a reflux chamber reserved between the inner cylinder and the outer cylinder, and a mixing chamber opened in the inner cylinder, the mixing chamber and the reflux chamber being connected;

[0007] The bottom of the outer cylinder is provided with a water inlet, a medicine inlet and an air inlet. The water inlet is connected to a wastewater tank through a water pipe, the medicine inlet is connected to a medicine tank through a medicine pipe, and the air inlet is connected to an air pump through an air pipe. The water inlet, medicine inlet and air inlet are all connected to the mixing chamber.

[0008] An aeration disc is provided on the inner wall of the mixing chamber. The aeration disc is located below the water inlet and the medicine inlet and is connected to the air inlet. Multiple air outlets are provided on the side wall of the aeration disc facing the top of the inner cylinder.

[0009] By adopting the above technical solution, wastewater enters the inner cylinder through the inlet, and the reagent enters the inner cylinder through the reagent inlet. An air pump provides gas to the aeration discs, and the gas in the aeration discs escapes evenly from multiple air outlets to form an airflow. The airflow blows the wastewater and reagent into the mixing chamber, where they are fully mixed and react to form crystals. The crystals sink to the bottom of the outer cylinder under gravity for easy recovery. Wastewater that does not meet the purification standards also reaches the bottom of the outer cylinder through the return chamber due to gravity. A certain degree of vacuum is formed at the bottom of the inner cylinder under the action of the airflow, drawing the returned wastewater back into the mixing chamber of the inner cylinder to mix and react with the reagent again until the wastewater meets the purification standards and is discharged from the top of the inner cylinder. Therefore, this application can fully mix wastewater and reagent in the circulation channel composed of the mixing chamber and the return chamber to obtain pollutant crystals and achieve the purpose of purifying wastewater, thus improving the wastewater purification capacity of the device in this application.

[0010] In one possible implementation: the plurality of air outlets are oriented in the same direction and each has a specified angle with the aeration disc.

[0011] By adopting the above technical solution, multiple air outlets have a specified angle with the aeration disc, so that the airflow formed in the mixing chamber of the inner cylinder is spiral. The spiral airflow has a longer path in the mixing chamber than the vertical airflow, so the wastewater and the agent have a greater chance of mixing. Moreover, the force of the airflow on the wastewater and the agent is greater, and the mixing is more uniform.

[0012] In one possible implementation: the aeration disc is semi-circular, and the outer curved surface of the aeration disc faces the top of the inner cylinder.

[0013] By adopting the above technical solution, the semi-circular design helps the gas to be evenly distributed inside the aeration disc and evenly released into the mixing chamber through the air outlet, thereby increasing the contact area between wastewater and chemicals. At the same time, the semi-circular shape can reduce the accumulation of crystals on the surface of the aeration disc, thereby reducing the risk of the air outlet being blocked.

[0014] In one possible implementation: a grain growth module is provided at the top of the inner cylinder, and the grain growth module is composed of multiple layers of mesh plates stacked together.

[0015] By adopting the above technical solution, multi-layer grid plates are stacked to form a grain growth module. When the airflow passes through the grain growth module, the airflow slows down, which is conducive to the mixing of wastewater and reagents and promotes grain growth.

[0016] In one possible implementation, the grid plate is provided with multiple protrusions.

[0017] By adopting the above technical solution, multiple protrusions are provided on the grid plate. When the airflow passes over the protrusions on the grid plate, the protrusions play a role in stirring the wastewater and the reagent, further mixing the wastewater and the reagent, and promoting the speed of grain growth.

[0018] In one possible implementation: the inner cylinder body includes an upper inner cylinder and a lower inner cylinder, and the upper inner cylinder and the lower inner cylinder are connected by a first connecting member;

[0019] The outer cylinder includes an upper outer cylinder and a lower outer cylinder, which are connected by a second connector.

[0020] In one possible implementation: the first connector includes an annular plate and screws;

[0021] The annular plate is installed at the bottom of the upper inner cylinder and the top of the lower inner cylinder. Mounting holes are provided on the annular plate located in the same vertical direction as the upper inner cylinder and the lower inner cylinder. Internal threads are provided in the mounting holes, and the internal threads are engaged with the external threads on the screws.

[0022] By adopting the above technical solution, the first connector is used to connect the upper inner cylinder and the lower inner cylinder, which makes it easier to increase the length of the inner cylinder at the first connector. The second connector connects the upper outer cylinder and the lower outer cylinder, which makes it easier to increase the length of the outer cylinder at the second connector. This allows for flexible increase in the length of the circulation channel composed of the mixing chamber and the reflux chamber, increasing the probability of wastewater and reagents mixing in the circulation channel and improving the degree of wastewater purification.

[0023] In one possible implementation, a first sealing ring is provided at the connection between the upper inner cylinder and the lower inner cylinder, and a second sealing ring is provided at the connection between the upper outer cylinder and the lower outer cylinder.

[0024] In one possible implementation, a recovery bin is provided at the bottom of the outer cylinder, and a discharge port is provided at the bottom of the recovery bin, with a valve provided on the discharge port.

[0025] In one possible implementation, a support frame is also included, which is disposed at the bottom of the outer cylinder.

[0026] In summary, this application includes the following beneficial technical effect:

[0027] Wastewater enters the inner cylinder through the inlet, and the reagent enters through the reagent inlet. An air pump supplies gas to the aeration discs, which release gas evenly from multiple pores, forming a spiral airflow. This spiral airflow blows the wastewater and reagent into the mixing chamber, where they mix thoroughly and react to form crystals. The crystals sink to the recovery chamber under gravity for recycling. Wastewater that does not meet purification standards also flows through the return chamber to the bottom of the outer cylinder due to gravity. A vacuum is created at the bottom of the inner cylinder by the airflow, drawing the returned wastewater back into the mixing chamber to mix and react with the reagent again until the wastewater meets purification standards and is discharged from the top of the inner cylinder. Therefore, this application can thoroughly mix wastewater and reagent in the circulation channel formed by the mixing chamber and the return chamber to obtain pollutant crystals and achieve wastewater purification, thus improving the wastewater purification capacity of the device. Attached Figure Description

[0028] Figure 1 This is a front sectional view of a wastewater crystallization treatment device according to an embodiment of this application.

[0029] Figure 2 This is a cross-sectional view of the aeration disc in an embodiment of this application.

[0030] Figure 3 yes Figure 2 A cross-sectional view of the air outlet on the aeration disc.

[0031] Explanation of reference numerals in the attached drawings: 1. Support frame; 2. Inner cylinder; 21. Mixing chamber; 22. Crystal growth module; 23. Separator; 231. Toothed overflow ring; 232. Cover; 233. Overflow port; 24. First connecting piece; 241. Annular plate; 242. Screw; 25. Mid-section sampling valve; 3. Outer cylinder; 31. Return chamber; 32. Water inlet; 33. Chemical inlet; 34. Air inlet; 35. Aeration disc; 351. Air outlet; 36. Recovery chamber; 37. Upper sampling valve; 38. Lower sampling valve. Detailed Implementation

[0032] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] The following is in conjunction with the instruction manual appendix. Figure 1-3 The embodiments of this application will be described in further detail.

[0034] This application provides a wastewater crystallization treatment device, which can be applied to purify wastewater generated in livestock farming, food processing, and ammonia synthesis industries. (Refer to...) Figure 1 The wastewater crystallization treatment device includes a support frame 1, an inner cylinder 2, and an outer cylinder 3. The inner cylinder 2 is located inside the outer cylinder 3. To ensure the stability of the inner cylinder 2 and the outer cylinder 3, a connecting rib is provided between them. The material of the connecting rib is the same as that used for the inner cylinder 2 and the outer cylinder 3, namely, a corrosion-resistant, high-strength material. The support frame 1 is located at the bottom of the outer cylinder 3. In this example, the support frame 1 is a tripod support frame, which fixes the outer cylinder 3 to the ground, improving the stability of the device.

[0035] The inner cylinder 2 is hollow and the hollow space is called the mixing chamber 21. There is a gap between the inner cylinder 2 and the outer cylinder 3, which is called the reflux chamber 31. The reflux chamber 31 is connected to the mixing chamber 21, specifically the two ends are connected to form a circulation channel.

[0036] At the bottom of the outer cylinder 3, there are water inlet 32, chemical inlet 33, and air inlet 34, which penetrate the side walls of the outer cylinder 3 and the inner cylinder 2. Water inlet 32 ​​is connected to a wastewater tank via a water pipe, and the wastewater tank contains untreated wastewater. Chemical inlet 33 is connected to a chemical tank via a chemical pipe, and the chemical tank contains chemicals. Depending on the application scenario, the type of chemicals in the chemical tank can be changed. For example, to reduce the hardness of wastewater, the chemicals in the chemical tank are sodium carbonate, soda ash, sodium hydroxide flakes, aluminum salts, iron salts, etc. Air inlet 34 is located at one end of the outer cylinder 3 and is connected to an air pump via an air pipe. At the other end of the inner cylinder 2, air inlet 34 is connected to an aeration disc 35, which is located at the bottom of the inner cylinder 2 and fixedly connected to the inner wall of the mixing chamber 21. Inside the inner cylinder 2, the aeration disc 35 is located below the water inlet 32 ​​and chemical inlet 33 and is connected to the air inlet 34. The air pump supplies gas to the aeration disc 35.

[0037] Solenoid valves are installed on the aforementioned water pipes, medicine pipes, and air pipes. Opening the solenoid valve on the water pipe allows wastewater to enter the mixing chamber 21; opening the solenoid valve on the medicine pipe allows the medicine to enter the mixing chamber 21; and opening the solenoid valve on the air pipe allows the air pump to supply gas to the aeration disc 35. In actual use, the solenoid valve on the air pipe is opened first, followed by the solenoid valves on the water pipe and medicine pipe simultaneously, or all three solenoid valves are opened simultaneously for synchronous operation.

[0038] Reference Figure 2 The aeration disc 35 is semi-circular, with its outer curved surface facing the top of the inner cylinder 2. Multiple air outlets 351 are provided on the side wall of the aeration disc 35 facing the top of the inner cylinder 2. These outlets 351 all face the same direction and form a specified angle with the aeration disc 35. Furthermore, the diameter of the outlet 351 at the end inside the aeration disc 35 is larger than the diameter at the end outside the aeration disc 35. Specifically... Figure 3 As shown, the air outlet 351 is in the shape of an inverted trapezoid, so that when the air pump supplies gas to the aeration disc 35, the gas in the aeration disc 35 escapes from multiple air outlets 351 at the same time, thereby forming a spiral airflow in the mixing chamber 21.

[0039] A grain growth module 22 is installed at the top of the inner cylinder 2, and the grain growth module 22 is also fixedly connected to the inner wall of the mixing chamber 21. The grain growth module 22 is composed of multiple layers of mesh plates, and the size of the holes reserved on the mesh plates can be customized as needed. Each layer of mesh plate is also provided with multiple protrusions. The mesh plates can buffer the airflow, while the protrusions can agitate the wastewater and reagents in the airflow to fully mix the wastewater and reagents and promote grain growth.

[0040] A separator 23 is also installed at the top of the inner cylinder 2, located above the grain growth module 22. The separator 23 includes a toothed overflow ring 231 and a cover 232. The toothed overflow ring 231 is set on the inner wall of the return cavity 31, forming an annular water tank with the return cavity 31. An overflow port 233 is opened on the side wall of the water tank, and the overflow port 233 is connected to the discharge pool through another water pipe. The cover 232 is closed on the top of the outer cylinder 3. After the pollutants in the wastewater react with the reagent, the wastewater becomes lighter. When the wastewater reaches the purification standard, water droplets are impacted by the airflow onto the cover 232 and gradually accumulate on it to form a water flow. The water flow flows along the cover 232 into the water tank, and then is discharged into the discharge pool through the overflow port 233, thus completing the task of collecting the purified water.

[0041] A recovery chamber 36 is provided at the bottom of the outer cylinder 3. The recovery chamber 36 connects the mixing chamber 21 and the return chamber 31. A discharge port is provided at the bottom of the recovery chamber 36, and a valve is provided on the discharge port to facilitate the recovery when there is a large amount of crystals in the recovery chamber 36. Specifically, the crystals sink to the recovery chamber 36 under the action of gravity for recovery, while the wastewater that does not meet the purification standard also reaches the bottom of the outer cylinder 3 through the return chamber 31 under the action of gravity. A certain degree of vacuum is formed at the bottom of the inner cylinder 2 under the action of airflow, and the returned wastewater is re-drawn into the mixing chamber 21 of the inner cylinder 2 to be mixed and reacted with the reagent again until the wastewater meets the purification standard and is discharged from the overflow port 233.

[0042] It should also be noted that a mid-section sampling valve 25 is provided in the middle section of the inner cylinder 2, while a lower-section sampling valve 38 and an upper-section sampling valve 37 are provided at the bottom and top of the outer cylinder 3, respectively, to obtain the content of pollutants in the wastewater in each section.

[0043] In this example, the purification level of wastewater is improved by increasing the number of wastewater circulation cycles. In order to reduce the number of wastewater circulation cycles and reduce the energy consumption of the device, the inner cylinder 2 is divided into an upper inner cylinder and a lower inner cylinder, and the outer cylinder 3 is divided into an upper outer cylinder and a lower outer cylinder. The length of the inner cylinder can be increased between the upper inner cylinder and the lower inner cylinder, and the length of the outer cylinder can be increased between the upper outer cylinder and the lower outer cylinder, thereby increasing the passage path of the spiral airflow to fully mix the wastewater and the reagent.

[0044] Specifically, the upper inner cylinder and the lower inner cylinder are connected by a first connecting member 24. The first connecting member 24 includes an annular plate 241 and a screw 242. The annular plate 241 is installed at the bottom of the upper inner cylinder and the top of the lower inner cylinder. The upper inner cylinder and the lower inner cylinder are connected and the upper inner cylinder is located above the lower inner cylinder. The annular plate 241 located in the same vertical direction as the upper inner cylinder and the lower inner cylinder are provided with mounting holes. The mounting holes are provided with internal threads, which are engaged with the external threads on the screw 242.

[0045] The upper outer cylinder and the lower outer cylinder are connected by a second connector, with the upper outer cylinder positioned above the lower outer cylinder. In this example, the second connector has the same structure as the first connector 24, except that the second connector acts on the outer cylinder 3. Therefore, the specific structure of the second connector can be found in the structure of the first connector 24, and will not be repeated here.

[0046] To ensure the airtightness of the mixing chamber 21 and the reflux chamber 31, a first sealing ring is provided at the connection between the upper inner cylinder and the lower inner cylinder, and a second sealing ring is provided at the connection between the upper outer cylinder and the lower outer cylinder. Both the first sealing ring and the second sealing ring are O-ring gaskets.

[0047] In summary, the implementation principle of the wastewater crystallization treatment device according to the embodiments of this application is as follows: First, wastewater enters the inner cylinder 2 through the inlet 32, and the reagent enters the inner cylinder 2 through the reagent inlet 33. The air pump provides gas to the aeration disc 35, and the gas in the aeration disc 35 escapes evenly from multiple air outlets 351 to form a spiral airflow. The spiral airflow blows the wastewater and reagent towards the mixing chamber 21, where the wastewater and reagent are fully mixed and react to form crystals. The crystals sink to the recovery chamber 36 under the action of gravity for easy recovery, while the wastewater that does not meet the purification standard also reaches the bottom of the outer cylinder 3 through the return chamber 31 due to gravity. The bottom of the inner cylinder 2 forms a certain degree of vacuum under the action of airflow, and the returned wastewater is re-inhaled into the mixing chamber 21 of the inner cylinder 2 to mix and react with the reagent again until the wastewater meets the purification standard and is discharged from the separator 23 to obtain purified water, thereby improving the wastewater purification capacity of the device of this application.

[0048] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the foregoing disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A wastewater crystallization treatment apparatus, characterized by comprising: It comprises an inner cylinder (2) and an outer cylinder (3), a reflux cavity (31) is reserved between the inner cylinder (2) and the outer cylinder (3), a mixing cavity (21) is arranged in the inner cylinder (2), and the mixing cavity (21) is communicated with the reflux cavity (31); A water inlet (32), a medicine inlet (33) and an air inlet (34) are arranged at the bottom of the outer cylinder (3), the water inlet (32) is communicated with a wastewater pool through a water pipe, the medicine inlet (33) is communicated with a medicine pool through a medicine pipe, the air inlet (34) is communicated with an air pump through an air pipe, and the water inlet (32), the medicine inlet (33) and the air inlet (34) are all communicated with the mixing cavity (21). An aeration disc (35) is arranged on the inner wall of the mixing cavity (21), the aeration disc (35) is located below the water inlet (32) and the medicine inlet (33) and is communicated with the air inlet (34), and a plurality of air outlets (351) are arranged on the side wall of the aeration disc (35) and face the top of the inner cylinder (2).

2. The wastewater crystallization treatment apparatus according to claim 1, characterized by The plurality of air outlets (351) are consistent in direction and have a specified included angle with the aeration disc (35).

3. The wastewater crystallization treatment apparatus according to claim 2, characterized by The aeration disc (35) is semicircular, and the outer curved surface of the aeration disc (35) faces the top of the inner cylinder (2).

4. The wastewater crystallization treatment apparatus according to claim 1, characterized by A crystal grain promoting module (22) is arranged at the top of the inner cylinder (2), and the crystal grain promoting module (22) is composed of a plurality of stacked grid plates.

5. The wastewater crystallization treatment apparatus according to claim 4, characterized by A plurality of protrusions are arranged on the grid plate.

6. The wastewater crystallization treatment apparatus according to claim 1, characterized by The inner cylinder (2) comprises an upper inner cylinder and a lower inner cylinder, and the upper inner cylinder and the lower inner cylinder are connected through a first connecting piece (24). The outer cylinder (3) comprises an upper outer cylinder and a lower outer cylinder, and the upper outer cylinder and the lower outer cylinder are connected through a second connecting piece.

7. The wastewater crystallization treatment apparatus according to claim 6, characterized by The first connecting piece (24) comprises an annular plate (241) and a screw (242). The annular plate (241) is mounted at the bottom of the upper inner cylinder and the top of the lower inner cylinder, mounting holes are arranged on the annular plate (241) in the same vertical direction of the upper inner cylinder and the lower inner cylinder, and internal threads are arranged in the mounting holes.

8. The wastewater crystallization treatment apparatus according to claim 6, characterized by A first sealing ring is arranged at the connection between the upper inner cylinder and the lower inner cylinder, and a second sealing ring is arranged at the connection between the upper outer cylinder and the lower outer cylinder.

9. The wastewater crystallization treatment apparatus according to claim 1, characterized by A recovery bin (36) is arranged at the bottom of the outer cylinder (3), a discharge port is arranged at the bottom of the recovery bin (36), and a valve is arranged on the discharge port.

10. The wastewater crystallization treatment apparatus according to claim 1, characterized by A support frame (1) is further arranged at the bottom of the outer cylinder (3).

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