Flocculant production mixing device

Abstract

The invention discloses a flocculant production mixing device which comprises a mixing tank body, a plurality of raw material liquid inlets are connected to the upper portion of the mixing tank body, a mixed liquid outlet is formed in the bottom of the mixing tank body, and the interior of a cavity of the mixing tank body is divided into a premixing cavity located on the upper portion and a mixing cavity located on the lower portion through a partition plate. The premixing cavity is communicated with the outside through a first ventilation pipeline, the mixing cavity is communicated with the outside through a second ventilation pipeline, and the premixing cavity is communicated with the mixing cavity through a siphon pipeline; a premixing cavity is formed in the mixing tank body, a mixing and stirring mechanism is arranged in the premixing cavity, a driving mechanism for driving the mixing and stirring mechanism to rotate is arranged on the mixing tank body, an inverted sleeve is fixedly arranged in the premixing cavity, the sleeve is positioned above the mixing and stirring mechanism, the upper end part of the siphon pipeline is positioned in the sleeve, and a block valve is arranged on the siphon pipeline; a vortex mixer is arranged in the mixing cavity; and the lower end part of the siphon pipeline is communicated with the vortex mixer.

Description

Technical Field

[0001] The present application relates to the technical field of flocculant production, and in particular to a flocculant production mixing device. Background Art

[0002] Flocculants are important chemical agents in the field of water treatment, mainly used to remove suspended matter and colloids in water and improve water quality. Its mechanism of action is that the positively or negatively charged groups neutralize some negatively or positively charged and difficult-to-separate particles or granules in the water, reduce the electric potential of these particles or granules, make them unstable, and use the flocculation properties of the flocculant to concentrate these particles and separate them by physical or chemical methods. Flocculant compounding refers to the mixing of two or more flocculants in a certain proportion to improve the flocculation effect and improve water quality.

[0003] The stirring device is the core equipment in the flocculant compounding process. The current stirring device usually includes a stirring tank, a stirring component rotatably arranged in the stirring tank, and the stirring component usually has a stirring shaft and a plurality of stirring blades fixed on the stirring shaft. The stirring shaft is driven by a motor to drive the stirring shaft to rotate rapidly, thereby achieving mixing of multiple raw materials.

[0004] However, the above stirring device has certain defects. First, the design of the stirring blade cannot fit the inner wall of the stirring tank, so there will be certain "dead corners" during the stirring process. Secondly, the stirring blade is too small, the mixing effect is poor, and when it is too large, the water resistance is large during the stirring process, so the motor load is too large; secondly, bubbles will be generated during the flocculant compounding process, and the bubbles will interfere with the uniform dispersion of the flocculant, resulting in uneven distribution of the flocculant. Especially in the process of mixing the flocculant with water or other solvents, bubbles will affect its uniformity and reduce the flocculation effect.

[0005] In the actual production process, the generation of bubbles is related to the stirring speed and temperature. Therefore, the current means of controlling bubbles mainly lie in controlling the stirring speed, controlling the temperature and adding defoaming agents. Therefore, the process parameters need to be obtained through multiple experiments before production. However, in actual production, temporary adjustments cannot be made. Adjusting any of the above parameters will have a more serious impact on the final product.

[0006] In view of this, those skilled in the art need to improve the existing stirring device to solve the above technical problems. Summary of the invention

[0007] The main purpose of the present application is to provide a flocculant production mixing device, which can make timely adjustments according to the generation of bubbles during the production process, thereby ensuring the product quality of the flocculant.

[0008] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides a flocculant production mixing device, comprising a mixing tank body, wherein the upper portion of the mixing tank body is connected to a plurality of raw material liquid inlets, and the bottom portion thereof is provided with a mixed liquid outlet, and the cavity of the mixing tank body is divided into a premixing chamber located at the upper portion and a mixing chamber located at the lower portion by a partition, the premixing chamber is connected to the outside through a first ventilation pipe, the mixing chamber is connected to the outside through a second ventilation pipe, and the premixing chamber and the mixing chamber are connected through a siphon pipe;

[0009] A mixing and stirring mechanism is arranged in the premixing chamber, a driving mechanism for driving the mixing and stirring mechanism to rotate is arranged on the mixing tank body, an inverted sleeve is fixedly arranged in the premixing chamber, the sleeve is located above the mixing and stirring mechanism, the upper end of the siphon pipe is located in the sleeve, and a shut-off valve is arranged on the siphon pipe;

[0010] A vortex mixer is arranged in the mixing chamber, and the lower end of the siphon pipe is connected with the vortex mixer.

[0011] Optionally, the shut-off valve is a pneumatic diaphragm valve.

[0012] Optionally, the mixing and stirring mechanism includes a rotatable shaft and a plurality of stirring blades fixedly arranged on the shaft, the upper end of the shaft is connected to the driving mechanism, and the lower end of the shaft is rotatably connected to the partition via a rotating bearing.

[0013] Optionally, the driving mechanism is a driving motor fixedly arranged on the top of the mixing tank body, and the upper end of the rotating shaft is connected to the motor shaft of the driving motor through a coupling.

[0014] Optionally, the sleeve is detachably connected to the inner wall of the mixing tank body.

[0015] Optionally, a mounting frame is fixedly provided on the inner side wall of the mixing tank body, a dovetail connection groove is provided on the mounting frame, and a dovetail connection portion matching with the dovetail connection groove is provided on the outer side wall of the sleeve.

[0016] Optionally, baffles are staggeredly arranged in the mixing chamber along the up and down directions, and the vortex mixer is fixedly arranged on the uppermost baffle.

[0017] Optionally, the vortex mixer includes an outer shell, blades rotatably disposed in the outer shell, a gradient liquid outlet is disposed on one side of the outer shell, and a liquid inlet connected to the lower end of the siphon pipe is disposed on the other side of the outer shell.

[0018] Optionally, the liquid flow rate in the siphon pipe is smaller than the liquid inlet flow rate of the mixing tank body.

[0019] Optionally, a defoamer is provided on the top of the siphon pipe.

[0020] Compared with the prior art, the present invention provides a flocculant production mixing device, which has the following beneficial effects: firstly, the whole mixing is divided into two parts: premixing and mixing. During premixing, only a plurality of raw materials are premixed, so the stirring mechanism does not need to be operated at a high speed, thereby reducing the motor load and the number of bubbles generated;

[0021] Secondly, the mixed liquid in the premixing chamber is transported to the mixing chamber by siphoning through a siphon pipe, which not only does not require a power device, but also converts the small flow accumulation into a pulsed large flow, thereby driving the blades in the vortex mixer to rotate rapidly to achieve mixing;

[0022] Finally, by setting a shut-off valve on the siphon pipe, when a large number of bubbles are found during the production process, it is only necessary to adjust the opening of the shut-off valve. Therefore, when the mixed liquid flows through the siphon pipe, the effect of the shut-off valve is equivalent to a smaller pipe diameter, thereby increasing the pressure. The bubbles are melted into the mixed liquid by means of pressurization, thereby reducing the number of bubbles without adjusting the process parameters set before production. In addition, the rotation speed of the blades in the vortex mixer can be further increased by means of pressurization, thereby further improving the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0024] Figure 1 is: a schematic diagram of the present invention;

[0025] Figure 2 is: a cross-sectional view of the present invention;

[0026] Figure 3 Yes: Schematic diagram of the mounting frame;

[0027] Figure 4 Yes: Schematic diagram of the baffle.

[0028] Among them: 1. mixing tank body; 2. raw material liquid inlet; 3. mixed liquid outlet; 4. premixing chamber; 5. mixing chamber; 6. partition; 7. first ventilation pipe; 8. second ventilation pipe; 9. stirring shaft; 10. stirring blade; 11. driving motor; 12. sleeve; 13. siphon pipe; 14. shut-off valve; 15. vortex mixer; 16. baffle; 17. mounting frame; 18. defoamer. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0032] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0033] In addition, the term "plurality" shall mean two or more.

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] like Figure 1-Figure 2As shown, a flocculant production mixing device comprises a mixing tank body 1, wherein the upper portion of the mixing tank body 1 is connected with a plurality of raw material liquid inlets 2, and the bottom portion thereof is provided with a mixed liquid liquid outlet 3, and the cavity of the mixing tank body 1 is divided into a premixing chamber 4 located at the upper portion and a mixing chamber 5 located at the lower portion by a partition 6, wherein the premixing chamber 4 is connected to the outside through a first ventilation pipe 7, and the mixing chamber 5 is connected to the outside through a second ventilation pipe 8, and the premixing chamber 4 and the mixing chamber 5 are connected through a siphon pipe 13;

[0036] The premixing chamber 4 is provided with a mixing and stirring mechanism, the mixing tank body 1 is provided with a driving mechanism for driving the mixing and stirring mechanism to rotate, an inverted sleeve 12 is fixedly provided in the premixing chamber 4, the sleeve 12 is located above the mixing and stirring mechanism, the upper end of the siphon pipe 13 is located in the sleeve 12, and a shutoff valve 14 is provided on the siphon pipe 13;

[0037] A vortex mixer 15 is disposed in the mixing chamber 5 , and the lower end of the siphon pipe 13 is connected to the vortex mixer 15 .

[0038] The overall working process is as follows:

[0039] The raw material liquid enters the premixing chamber 4 through the raw material inlet 2, and is mixed by the mixing and stirring mechanism to form a mixed liquid. As the liquid level of the mixed liquid gradually rises and reaches the siphon point, a siphon is formed, that is, a small flow accumulation is converted into a pulsed large flow, and enters the vortex mixer 15 through the siphon pipe 13 to drive the blades to rotate rapidly, thereby achieving rapid mixing, and the mixed liquid is finally discharged from the mixed liquid outlet 3. During the production process, the operator finds that the number of bubbles has increased, and adjusts the opening of the shut-off valve 14. When the mixed liquid flows through the siphon pipe 13, the shut-off valve 14 acts as a smaller pipe diameter, thereby increasing the pressure. The bubbles are melted into the mixed liquid by means of pressurization, thereby reducing the number of bubbles without adjusting the process parameters set before production. In addition, the rotation speed of the blades in the vortex mixer 15 can be further increased by pressurization, thereby further improving the mixing effect.

[0040] In this embodiment, preferably, the shut-off valve 14 is a pneumatic diaphragm valve.

[0041] The mixing and stirring mechanism includes a rotatable shaft and a plurality of stirring blades 10 fixedly arranged on the shaft. The upper end of the shaft is connected to the driving mechanism, and the lower end of the shaft is rotatably connected to the partition 6 via a rotating bearing.

[0042] Preferably, in this embodiment, the driving mechanism is a driving motor 11 fixedly arranged on the top of the mixing tank body 1, and the upper end of the rotating shaft is connected to the motor shaft of the driving motor 11 through a coupling. When stirring, the driving motor 11 drives the stirring shaft 9 to rotate, thereby driving the stirring blades 10 to rotate, thereby achieving mixing of the liquid in the premixing chamber 4.

[0043] like Figure 3 As shown, in order to be able to maintain the sleeve 12, the sleeve 12 is detachably connected to the inner wall of the mixing tank body 1. Preferably, a mounting bracket 17 is fixedly provided on the inner wall of the mixing tank body 1, and a dovetail connecting groove is provided on the mounting bracket 17. The outer wall of the sleeve 12 is provided with a dovetail connecting portion that cooperates with the dovetail connecting groove. It should be noted that the dovetail connecting groove on the mounting bracket 17 is not open at both ends, and preferably the upper end is open and the lower end is closed. During installation, the dovetail connecting portion on the sleeve 12 is inserted into the dovetail connecting groove from top to bottom.

[0044] like Figure 4 As shown, in order to allow the mixed liquid that has been quickly mixed by the vortex mixer 15 to be further mixed before flowing out of the mixing tank, baffles 16 are staggeredly arranged in the mixing chamber 5 along the up and down directions, and the vortex mixer 15 is fixedly arranged on the topmost baffle 16, so that the mixed liquid can flow back along the baffle 16, thereby further improving the mixing effect, and the shape of the baffle 16 matches the inner cavity of the mixing tank body 1. In this embodiment, the cross-section of the inner cavity of the mixing tank body 1 is circular, and thus the baffle 16 corresponds to a circle with a notch.

[0045] Preferably, in this embodiment, the vortex mixer 15 includes an outer shell and blades rotatably arranged in the outer shell. A gradient liquid outlet is arranged on one side of the outer shell, and a liquid inlet connected to the lower end of the siphon pipe 13 is arranged on the other side of the outer shell. The pulsed large-flow mixed liquid entering the outer shell through siphoning can drive the blades to rotate rapidly, thereby achieving rapid mixing of the liquid.

[0046] In order to enable continuous and intermittent production, the liquid flow in the siphon pipe 13 is greater than the liquid inlet flow of the mixing tank body 1, and siphoning is performed only when the liquid level reaches the siphon point, that is, the accumulation of small flow is converted into a pulsed large flow.

[0047] In this embodiment, preferably, a defoamer 18 is provided on the top of the siphon pipe 13. First of all, the structure of the defoamer 18 is not the innovation of the present application, but is obtained through procurement. Its purpose is to eliminate large bubbles entering the siphon pipe 13. Although a low-speed motor is used to drive the stirring in the premixing chamber 4, bubbles will still be generated. The low speed only reduces the number of bubbles, and the bubbles are divided into large-sized bubbles and small-sized bubbles. The large-sized bubbles are eliminated by the defoamer 18, and the small-sized bubbles are dissolved in the mixed liquid by adjusting the pressure by the shut-off valve 14 on the siphon pipe 13, thereby reducing the overall number of bubbles, which has a good effect on improving product quality. The most important thing is that there is no need to change the process parameters obtained through experiments before production, nor is there any need to increase the use of defoaming agents. Timely adjustments can be made according to actual working conditions during the production process.

[0048] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flocculant production mixing device, characterized in that: It comprises a mixing tank body, wherein the upper part of the mixing tank body is connected with a plurality of raw material liquid inlets, and the bottom part thereof is provided with a mixed liquid outlet, and the cavity of the mixing tank body is divided into a premixing chamber located at the upper part and a mixing chamber located at the lower part by a partition, the premixing chamber is connected with the outside through a first ventilation pipe, the mixing chamber is connected with the outside through a second ventilation pipe, and the premixing chamber and the mixing chamber are connected through a siphon pipe; A mixing and stirring mechanism is arranged in the premixing chamber, a driving mechanism for driving the mixing and stirring mechanism to rotate is arranged on the mixing tank body, an inverted sleeve is fixedly arranged in the premixing chamber, the sleeve is located above the mixing and stirring mechanism, the upper end of the siphon pipe is located in the sleeve, and a shut-off valve is arranged on the siphon pipe; A vortex mixer is arranged in the mixing chamber, and the lower end of the siphon pipe is connected with the vortex mixer.

2. A flocculant production mixing device as claimed in claim 1, characterized in that: The cut-off valve is a pneumatic diaphragm valve.

3. A flocculant production mixing device as claimed in claim 1, characterized in that: The mixing and stirring mechanism comprises a rotatable rotating shaft and a plurality of stirring blades fixedly arranged on the rotating shaft. The upper end of the rotating shaft is connected to the driving mechanism, and the lower end of the rotating shaft is rotatably connected to the partition through a rotating bearing.

4. A flocculant production mixing device as claimed in claim 3, characterized in that: The driving mechanism is a driving motor fixedly arranged on the top of the mixing tank body, and the upper end of the rotating shaft is connected to the motor shaft of the driving motor through a coupling.

5. A flocculant production mixing device as claimed in claim 1, characterized in that: The sleeve is detachably connected to the inner side wall of the mixing tank body.

6. A flocculant production mixing device as claimed in claim 5, characterized in that: A mounting frame is fixedly arranged on the inner side wall of the mixing tank body, a dovetail connection groove is provided on the mounting frame, and a dovetail connection part matching with the dovetail connection groove is provided on the outer side wall of the sleeve.

7. A flocculant production mixing device as claimed in claim 1, characterized in that: Baffles are staggeredly arranged in the mixing chamber along the up and down directions, and the vortex mixer is fixedly arranged on the uppermost baffle.

8. A flocculant production mixing device as claimed in claim 7, characterized in that: The vortex mixer comprises an outer shell and blades rotatably arranged in the outer shell. A gradual liquid outlet is arranged on one side of the outer shell, and a liquid inlet connected to the lower end of the siphon pipe is arranged on the other side of the outer shell.

9. A flocculant production mixing device as claimed in claim 1, characterized in that: The liquid flow rate in the siphon pipe is greater than the liquid inlet flow rate of the mixing tank body.

10. A flocculant production mixing device as claimed in claim 1, characterized in that: A defoamer is arranged on the top of the siphon pipe.

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