Swirl water curtain premixing device

Abstract

The utility model relates to a cyclone water curtain premixing device belongs to sewage treatment technical field. The cyclone water curtain premixing device is set to the delivery port of the storage medicine box and the feed inlet of the medicine dissolving box, and it includes: the powder receiving cyclone chamber, the erosion cyclone chamber and the cone bucket, the powder receiving cyclone chamber and the erosion cyclone chamber are set up upside down, and the cone bucket is partially arranged in the powder receiving cyclone chamber and partially arranged in the erosion cyclone chamber, the powder receiving cyclone chamber is equipped with the first water inlet in the lateral wall, the erosion cyclone chamber is equipped with the second water inlet in the lateral wall, the cone bucket is equipped with the primary cyclone water outlet in the bottom, the erosion cyclone chamber is equipped with the secondary cyclone water outlet, and the primary cyclone water outlet is located in the range of the secondary cyclone water outlet. The utility model discloses a primary cyclone structure and a secondary cyclone structure are arranged in the pre-dilution device, and the flocculating agent is fully dissolved during premixing.

Description

Technical Field

[0001] This utility model relates to a vortex water curtain premixing device, belonging to the field of wastewater treatment technology. Background Technology

[0002] Wastewater treatment plants commonly use polyacrylamide as a flocculant to cause sludge in wastewater to flocculate and settle. To improve the efficiency of flocculant preparation, researchers designed an automatic dissolving machine that can prepare polyacrylamide powder into an aqueous solution of a specific concentration. According to the design requirements, the automatic dissolving machine should not only automatically add the flocculant and water according to the specified ratio, ultimately preparing a solution of the required concentration, but also automatically detect, alarm, shut down, and resume operation under conditions such as water outages, flocculant outages, power outages, high / low liquid levels, and high / low powder levels. However, existing automatic dissolving machines still have some problems in use, resulting in unstable flocculant preparation.

[0003] One problem with automatic dissolving machines for flocculants is due to the following characteristics of polyacrylamide powder: Individual polyacrylamide particles dissolve easily in water; however, when particles accumulate, the long molecular chains of the dissolved polyacrylamide on the outer layer immediately capture undissolved particles, forming colloidal flocs. Once these flocs form, they are difficult to dissolve, making it impossible to form a uniform aqueous solution of the set concentration, thus causing difficulties for subsequent processing. To solve this problem, patent application CN102167433A employs a dissolution method after atomization; however, this improved method requires atomization equipment, which is relatively complex. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this invention proposes a swirling water curtain premixing device. By incorporating a primary swirling structure and a secondary swirling structure within the premixing device, the flocculant can be fully dissolved.

[0005] This utility model relates to a swirling water curtain premixing device, which is configured to connect the discharge port of the drug storage tank and the inlet of the drug dissolving tank, and includes: a powder receiving swirling chamber, an immersion swirling chamber and a cone hopper;

[0006] The powder receiving cyclone chamber and the etching cyclone chamber are arranged vertically, with part of the cone bucket placed in the powder receiving cyclone chamber and part of it placed in the etching cyclone chamber;

[0007] The powder receiving vortex chamber has a first water inlet on its side wall, and the immersion vortex chamber has a second water inlet on its side wall;

[0008] The cone-shaped hopper is provided with a primary vortex inlet at the bottom, and the immersion vortex chamber is provided with a secondary vortex inlet. The primary vortex inlet is located within the range of the secondary vortex inlet.

[0009] Compared with the prior art, the present invention has the following technical effects:

[0010] Premixed water enters the powder receiving vortex chamber through the first inlet. As the liquid level gradually rises, it enters the cone hopper, forming a swirling water curtain on the surface of the cone hopper. As the cone surface shrinks, the swirling speed increases, and finally, it falls from the primary vortex drop outlet. The polyacrylamide powder sent from the storage tank falls onto the swirling water curtain in the cone hopper and falls from the primary vortex drop outlet along with the water flow.

[0011] Premixed water enters the erosion vortex chamber through the second inlet and falls from the secondary vortex outlet, impacting the vortex water curtain falling from the primary vortex outlet. This erodes the undissolved polyacrylamide powder in the water curtain, ensuring that the polyacrylamide powder and water are fully mixed. The mixture then falls into the dissolving tank for dilution. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 Top view of the vortex water curtain premixing device;

[0014] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0015] In the diagram: 100, powder receiving vortex chamber; 101, first inlet; 102, overflow outlet; 200, erosion vortex chamber; 201, second inlet; 202, secondary vortex outlet; 203, drainage slope; 300, cone hopper; 301, primary vortex outlet; 400, communicating vessel; 501, first inlet pipe; 502, second inlet pipe; 600, chemical storage tank; 601, powder feeding screw; 700, chemical dissolving tank. Detailed Implementation

[0016] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be noted that in specific embodiments, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model. They 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 utility model. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly defined, 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; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model embodiment relates to a swirling water curtain premixing device, including: a powder receiving swirling chamber 100, an immersion swirling chamber 200, and a cone hopper 300;

[0018] The powder receiving cyclone chamber 100 and the etch cyclone chamber 200 are arranged vertically, and part of the cone 300 is arranged in the powder receiving cyclone chamber 100 and part of it is arranged in the etch cyclone chamber 200.

[0019] The powder receiving vortex chamber 100 is provided with a first water inlet 101 on the side wall, and the immersion vortex chamber 200 is provided with a second water inlet 201 on the side wall;

[0020] The cone hopper 300 is provided with a primary vortex inlet 301 at the bottom, and the erosion vortex chamber 200 is provided with a secondary vortex inlet 202. The primary vortex inlet 301 is located within the range of the secondary vortex inlet 202.

[0021] In some preferred embodiments, the secondary vortex drain outlet 202 is provided with a drainage slope 203, which converges toward the primary vortex drain outlet 301.

[0022] Preferably, the taper of the drainage slope 203 is the same as the taper of the cone surface on the cone hopper 300.

[0023] Preferably, the drainage slope 203 extends outward from the bottom of the erosion vortex chamber 200, and the distance it extends along the axial direction of the cone 300 does not exceed the primary vortex drain outlet 301.

[0024] In some preferred embodiments, the powder receiving vortex chamber 100 is provided with an overflow port 102 at the top, and the overflow port 102 is connected to the etch vortex chamber 200. Preferably, a communicating vessel 400 is provided, with one end of the communicating vessel 400 connected to the overflow port 102 and the other end connected to the etch vortex chamber 200.

[0025] In some preferred embodiments, the first water inlet 101 is located at the lower part of the powder receiving vortex chamber 100 and is connected to the first water inlet pipe 501, and the second water inlet 201 is connected to the second water inlet pipe 502. The first water inlet pipe 501 and the second water inlet pipe 502 can be connected to the same water supply facility, which can also be the water supply facility for the dissolving tank 700, thereby reducing costs by sharing the water supply facility.

[0026] In some preferred embodiments, during the mixing of the powder and water, the flow rate of the second inlet 201 is greater than that of the first inlet 101, thereby providing a more powerful corrosive water flow. Preferably, the first inlet 101 is smaller than the second inlet 201. The second inlet pipe 502 connected to the second inlet 201 can be referred to as the main inlet pipe, and the first inlet pipe 501 connected to the first inlet 101 can be referred to as the branch inlet pipe.

[0027] In some preferred embodiments, the powder receiving vortex chamber 100 is a cylindrical structure, and the first water inlet 101 is arranged along the tangential direction of the cylindrical structure.

[0028] In some preferred embodiments, the immersion vortex chamber 200 is a cylindrical structure, and the second inlet 201 is arranged along the tangential direction of the cylindrical structure.

[0029] Preferably, both the powder receiving vortex chamber 100 and the erosion vortex chamber 200 are cylindrical structures, with the first inlet 101 arranged along the tangent of the cylindrical structure and the second inlet 201 arranged along the tangent of the cylindrical structure, which is conducive to the formation of vortices.

[0030] In this embodiment of the invention, the swirling water curtain premixing device is connected to the outlet of the drug storage tank 600 on one hand and to the inlet of the drug dissolving tank 700 on the other. The drug storage tank 600 is equipped with a powder feeding screw 601, which extends into the powder receiving swirling chamber 100 through the powder feeding pipe opening provided on the side wall of the powder receiving swirling chamber 100. The outlet of the powder feeding screw 601 is located above the cone hopper 300. The erosion swirling chamber 200 is located above the drug dissolving tank 700, and the secondary swirling water outlet 202 is connected to the inlet of the drug dissolving tank 700.

[0031] The water flowing in from the first inlet 101 forms a vortex within the powder receiving vortex chamber 100. As the water level rises, the water overflows the top of the cone 300, forming a vortex water curtain on the surface of the cone 300. As the height decreases and the cone surface shrinks, the vortex velocity increases, finally falling from the primary vortex drop outlet 301. Polyacrylamide powder delivered from the storage tank 600 falls onto the vortex water curtain on the inner surface of the cone 300 and falls from the primary vortex drop outlet 301 with the water flow. Compared to direct drop, the movement path of the polyacrylamide powder is significantly increased under the action of the vortex, and the contact time with water in the cone 300 is prolonged. Simultaneously, the water flow velocity increases, allowing for initial mixing of the polyacrylamide powder and water. When the flow rate of the inlet branch pipe exceeds a certain limit, the liquid level in the powder receiving vortex chamber 100 rises to the overflow port 102, and water overflows from the overflow port 102 to the communicating vessel 400, merging with the inlet water from the main inlet pipe and entering the erosion vortex chamber 200. Due to the large flow rate of the main inlet pipe, the resulting vortex velocity is high, flowing out from the secondary vortex outlet 202 in a rapidly rotating state. This impacts the vortex water curtain falling from the primary vortex outlet 301, eroding the polyacrylamide powder in the water curtain. This causes the undissolved polyacrylamide powder to mix with the water again, and then fall together into the dissolving tank 700. Because the polyacrylamide powder has sufficient and uniform contact with the water during the premixing process, there is no clumping after falling into the dissolving tank 700. After being stirred and mixed by the agitator in the dissolving tank 700, a uniform solution of the preset concentration is formed.

[0032] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A vortex water curtain premixing device, configured to connect the discharge port of a drug storage tank and the inlet of a drug dissolving tank, characterized in that, include: Powder receiving cyclone chamber, erosion cyclone chamber, and cone; The powder receiving cyclone chamber and the erosion cyclone chamber are arranged vertically, with the cone-shaped hopper partly located in the powder receiving cyclone chamber and partly located in the erosion cyclone chamber; The powder receiving vortex chamber has a first water inlet on its side wall, and the immersion vortex chamber has a second water inlet on its side wall; The cone-shaped hopper is provided with a primary vortex inlet at the bottom, and the immersion vortex chamber is provided with a secondary vortex inlet. The primary vortex inlet is located within the range of the secondary vortex inlet.

2. The vortex water curtain premixing device according to claim 1, characterized in that, The secondary vortex inlet is provided with a drainage slope that converges towards the primary vortex inlet.

3. The swirling water curtain premixing device according to claim 2, characterized in that, The taper of the drainage slope is the same as the taper of the cone surface on the cone hopper.

4. The swirling water curtain premixing device according to claim 2, characterized in that, The drainage slope extends outward from the bottom of the erosion vortex chamber, and the distance it extends along the axial direction of the cone does not exceed the primary vortex outlet.

5. The swirling water curtain premixing device according to claim 1, characterized in that, The powder receiving vortex chamber has an overflow port at the top, which is connected to the immersion vortex chamber.

6. The swirling water curtain premixing device according to claim 5, characterized in that, A communicating vessel is also provided, with one end connected to the overflow port and the other end connected to the immersion vortex chamber.

7. The vortex water curtain premixing device according to claim 1, characterized in that, The first water inlet is smaller than the second water inlet.

8. The swirling water curtain premixing device according to claim 1 or 7, characterized in that, The powder receiving vortex chamber has a cylindrical structure, and the first water inlet is set along the tangent direction of the cylindrical structure.

9. The swirling water curtain premixing device according to claim 1 or 7, characterized in that, The immersion vortex chamber is a cylindrical structure, and the second water inlet is set along the tangential direction of the cylindrical structure.

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