CN1122562C - High-shear emulsifying homogenizer - Google Patents

Abstract

The invention relates to a high-shear emulsification and homogenization equipment, which includes a homogeneous pump, a stirring tank, a feeding pipe, and a discharging pipe, and is characterized in that the homogenizing pump and the stirring tank are connected in series through the feeding pipe and the discharging pipe Circulation setting, the homogenizing pump relies on the precise cooperation between the impeller rotor and the shearing stator, so that the material can fully withstand hundreds of thousands of times of shearing per minute, so as to obtain a more effective homogenization effect. Compared with the prior art, the invention has the advantages of good homogenization effect, convenient maintenance, strong adaptability and the like.

Description

High shear emulsification and homogenization equipment

The invention relates to processing equipment for uniformly mixing fluids in the daily chemical industry, in particular to high-shear emulsifying and homogenizing equipment.

In the process of cosmetics production, most emulsion and cream products include two important processes of emulsification and dispersion. Regardless of the influence of emulsifiers and surfactants, emulsification and dispersion include a process that relies on mechanical force to crush liquid droplets and tiny solid particles. Therefore, emulsification refers to the process in which one of two immiscible liquids becomes droplets and disperses in the other liquid. Dispersion refers to the process of uniformly distributing and suspending fixed particles in a liquid. Therefore, it can be seen that the quality of emulsification and dispersion will directly affect the appearance, stability, ductility and other performance of the finished product. The existing emulsification and homogenization equipment mainly adopts a vertical reaction kettle integrating stirring and homogenization. There are mainly two installation methods for the homogenization pump (homogenization head) in the equipment on the kettle body. The bottom of the kettle is installed vertically upwards, and one is installed by inserting the top of the kettle downward. However, these two methods have a common disadvantage, that is, the homogenizing pump is fixed on the kettle body, and the disassembly and assembly process such as repair and maintenance after a failure is quite cumbersome and laborious. And if the stirring of the reactor is not uniform enough, the homogenization effect is not ideal. In addition, for this type of homogenizer with the homogeneous pump installed at the bottom, when some hard impurities are sucked in, mechanical failures are prone to occur.

The purpose of the present invention is to provide a high-shear emulsification homogenization equipment with good homogenization effect and convenient maintenance in order to overcome the above-mentioned defects in the prior art.

In order to achieve the above object, the present invention can adopt the following technical solutions: high-shear emulsification and homogenization equipment, including a homogeneous pump, a stirring tank, a feed pipe, and a discharge pipe, which are characterized in that the homogeneous pump and the stirring tank pass through The feed pipe and the discharge pipe are arranged in series and circulated; the upper side of the stirred tank is provided with a feed port, and the bottom is provided with a discharge port. The discharge port is provided with a three-way valve. The homogeneous pump is axially It is provided with a feed port and a discharge port radially. The feed port of the homogeneous pump communicates with the discharge port of the stirring tank through the above discharge pipe and the three-way valve, and the discharge port of the homogeneous pump passes through The above-mentioned feed pipe is connected with the feed port of the stirred tank.

The homogeneous pump includes a motor, a crankshaft, a shaft sleeve, an impeller rotor keyed at the end of the crankshaft, a casing covering the impeller rotor and fixed on the shaft sleeve, and a shear stator. The stator is sleeved on the radially outer edge of the above-mentioned impeller rotor and maintains a certain gap with it. The shear stator is provided with a plurality of through holes in the radial direction, and the casing is provided with a feed inlet in the axial direction. There is a discharge port.

The housing and the crankshaft are mechanically sealed.

Said equipment also includes a movable flatbed car, said homogeneous pump is fixed on the flatbed car.

High-shear emulsification and homogenization equipment can be widely used in various crushing and homogenization processes in daily chemical production. So that the material can fully withstand hundreds of thousands of times of shearing per minute, so as to obtain a newer and more effective mixing effect. Because its action process is a pure shearing process, plus it is a serial working mode with the cooperating working equipment. In this way, the process cycle route of the material can be shortened, the processing quality can be improved faster, and the waste of energy in some unnecessary links can also be reduced. To get higher work efficiency, in addition, several stators with different shapes can be designed to meet different application requirements.

Due to the ingenious design and simple structure of this high-shear emulsification homogeneous pump, it is easy for users to understand and master, so it is very convenient to assemble and disassemble, and only one person can quickly and accurately complete the replacement, cleaning or maintenance of the stator. Work. In addition, the high-shear emulsifying homogeneous pump is not only easy to operate and maintain, but also can be moved flexibly. It can be used with multiple reactors, which improves work efficiency, and can make ordinary stirring tanks of different specifications and models have the function of homogeneous emulsification. , so that the configuration of the production process and equipment flow does not have to stick to the original fixed flow, and has better adaptability and diversity.

Fig. 1 is the structural representation of high-shear emulsification homogenization equipment;

Fig. 2 is a structural schematic diagram of a high-shear emulsification homogeneous pump;

Fig. 3 is a structural schematic diagram of the impeller stator and the shear rotor in Fig. 2 .

Below in conjunction with accompanying drawing, the present invention will be further described:

The high-shear emulsification and homogenization equipment shown in Figure 1 includes a homogeneous pump 1, a stirring tank 2, a feed pipe 3, and a discharge pipe 4. The homogeneous pump 1 and the stirring tank 2 pass through the feed pipe 3 1. The discharge pipe 4 is arranged in series and circularly; the upper side of the stirred tank 2 is provided with a feed port 21, the bottom is provided with a discharge port 22, and the inside is provided with a stirring paddle 23, and the stirred tank discharge port 22 A three-way valve 5 is provided; the homogeneous pump 1 is provided with a feed port 151 in the axial direction and a discharge port 152 in the radial direction, and the feed port 151 of the homogeneous pump passes through the discharge pipe 4 and the tee The valve 5 communicates with the outlet 22 of the stirred tank, and the outlet 152 of the homogeneous pump communicates with the feed port 21 of the stirred tank through the feed pipe 3 . It can also be provided with a movable flatbed car 6 on which the homogeneous pump 1 is fixed.

The high-shear emulsification homogeneous pump shown in Figure 2 and Figure 3 includes a motor 11, a crankshaft 12, a shaft sleeve 13, an impeller rotor 14 keyed at the end of the crankshaft, covers the impeller rotor and is fixed on the shaft The casing 15 that is put on is characterized in that it also includes a shear stator 16. The shear stator 16 is sleeved on the radially outer edge of the impeller rotor 14 and maintains a certain gap with it. The shear stator 16 A plurality of through holes 161 are provided in the radial direction, the housing 15 is provided with a feed port 151 in the axial direction, and a discharge port 152 is provided in the radial direction, and the housing 15 and the shaft 12 adopt a mechanical seal sleeve 17 Make a seal.

After the homogeneous pump is started, due to the high-speed rotation of the impeller rotor, a pressure difference is generated between the center and the outer edge of the impeller rotor. The material is continuously sucked into the cavity of the rotor impeller from the inlet of the pump, and then the outer edge of the impeller impacts the stator at a high speed. Press it out and enter the pump cavity. At this time, a turbulent flow in one direction is generated in the pump cavity, and the material particles collide and rub against each other randomly again. The second crushing is formed, and finally a part of the material moves to the outlet of the pump to flow out. In this way, two pulverizations are carried out simultaneously in a very short time.

The homogeneous pump can usually be matched with a single-shaft stirred tank, and works in a series circulation mode. The volume of the tank body and the power of the homogenized pump should be reasonably matched, and the details should be determined by the physical properties of the material and processing requirements. The specific connection method can refer to the following aspects:

1. The inlet and outlet pipelines of the pump can be connected by hose or hard pipe. If the hose is used to connect, the pump application will be more flexible. To obtain more working positions and work efficiency, but it should be noted that the inlet pipeline of the pump should bear the negative pressure of suction, so a hose with reinforced ribs should be selected.

2. In the way of connection between the inlet pipeline of the pump and the discharge port at the bottom of the stirring tank, a three-way ball (butterfly) valve should be installed at the discharge port. Open valve 51, valve 53, close valve 52 during work. When discharging, open valve 51, valve 52, and close valve 53. This can ensure that the discharge of finished products is not affected, and the continuity of work is improved. At the same time, a flexible pipe can be connected to the outlet of the valve 52 to lead into the cleaning water tank, open the valve 52, valve 53, close the valve 51, start the pump to carry out the separate cleaning work of the pump, or use the flexible pipe to pass into the raw material barrel, open the valve 52, Valve 53 and valve 51 are closed, and the pump is started to feed materials into the stirred tank.

3. Attention should be paid to the connection between the outlet pipeline of the pump and the stirred tank. For an open container, the inlet of the outlet pipeline into the tank body should be lower than the liquid level in the tank as much as possible to avoid a large number of air bubbles. In addition, the shape of the stirring blades in the stirring tank should be as simple as possible to avoid more air bubbles. If possible, vacuum defoaming can be carried out before discharging, but a fully sealed stirring tank must be used.

4. Sometimes in order to achieve better and faster emulsification and dispersion effects, two homogeneous pumps can also be connected in series. This method enables the pump to obtain a larger head, which is suitable for conveying materials with high viscosity.

Claims (4)

1. high-shear emulsifying homogenizer comprises Homogenizing pump, stirred tank, feed pipe, discharge nozzle, it is characterized in that, described Homogenizing pump and stirred tank are provided with by feed pipe, discharge nozzle series circulation formula; Described stirred tank upper lateral part is provided with charging aperture, the bottom is provided with discharging opening, this discharging opening is provided with triple valve, described Homogenizing pump is axially arranged with charging aperture, radially is provided with discharging opening, described Homogenizing pump charging aperture is communicated with the stirred tank discharging opening by above-mentioned discharge nozzle and triple valve, and described Homogenizing pump discharging opening is communicated with the stirred tank charging aperture by above-mentioned feed pipe.

2. high-shear emulsifying homogenizer according to claim 1, it is characterized in that, described Homogenizing pump comprises that motor, arbor, axle sleeve, key be located at the vane rotor of arbor end, cover this vane rotor and be fixed in housing on the axle sleeve, shear stator, described shearing stator is sheathed on the radially outer edge of above-mentioned vane rotor and keeps certain interval with it, described shearing stator radially be provided with a plurality of through holes, described housing is axially arranged with charging aperture, radially is provided with discharging opening.

3. high-shear emulsifying homogenizer according to claim 2 is characterized in that, described housing and arbor adopt mechanical seal.

4. high-shear emulsifying homogenizer according to claim 1 is characterized in that, also comprises a flat car movably, and described Homogenizing pump is fixed on this flat car.

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