CN201899900U - Liquid-liquid two-phase mixing-separating device - Google Patents

Abstract

The utility model relates to a liquid-liquid two-phase mixing-separation device, comprising: a motor (1) at the top, a transmission mechanism (2) connected to the motor, a rotating shaft (10) connected to the transmission mechanism, and a The upper bearing and bearing housing (3), the lower bearing and bearing housing (15), the mechanical seal (16) located on the lower bearing and bearing housing, the inner cylinder (14), the outer cylinder (13), the light seal located in the inner cylinder Phase weir (7) and heavy phase weir (4), light phase collection chamber (8), light phase outlet (9), heavy phase collection chamber (5), heavy phase outlet (6), light phase inlet located in the outer cylinder (11) and heavy phase inlet (12), bearing (17), the shock absorber (18) that is positioned at the bottom of bearing, and the bottom vane (19) that is positioned at the bottom of urceolus.

Description

Liquid-liquid two-phase mixing-separation device

technical field

The utility model belongs to the field of liquid-liquid two-phase mixing-separation, and relates to a liquid-liquid two-phase mixing-separation device, which can be used in the fields of hydrometallurgy, petroleum, chemical industry, medicine, food, waste water treatment, nuclear energy and the like .

Background technique

Two-phase mixing-separation is a commonly used and important chemical unit operation. Commonly used equipment in the industry includes box-type equipment (including traditional extraction kettles, mixing and settling tanks), and tower-type equipment.

Mixing and settling tanks rely on gravity to achieve two-phase separation, and are widely used in industry because of their advantages such as relatively large adaptability to changes in phase and flow rate, and easy operation. However, it occupies a large area and requires a large factory building, so the one-time investment is relatively large. Moreover, since the mixing and settling tank has a large tank volume stock, its two-phase residence time is relatively long, which is a fatal defect for the separation of thermodynamically or chemically unstable substances, which also leads to the failure of this equipment in some special Occasions (such as fast separation or easy emulsification, difficult separation system) are difficult to adapt, which greatly limits its scope of use. At the same time, the longer two-phase residence time and start-up and shutdown time also cause its separation efficiency to be low, which is harmful to industrial production. produce adverse effects.

The commonly used tower equipment is the rotating disk tower, pulse tower, extraction tower and so on. Compared with the mixing clarifier, the tower equipment has its unique advantages, such as high-altitude development, small footprint, and less equipment storage. In addition, it has a large processing capacity and good sealing performance, and is suitable for high-temperature, high-pressure, large-flux and easy-to-use equipment. Flammable and explosive environment. However, its equipment is relatively high and requires a high factory building, so the cost is high; in addition, the requirements for equipment installation and liquid transportation are also high, and it is easy to form flooding and it is difficult to return to normal; it is difficult to enlarge the equipment design, and a large safety factor needs to be reserved. The effectiveness of the equipment cannot be fully utilized, and for the extraction tower without mechanical agitation, there are still situations where the mass transfer efficiency is low, the processing capacity is small, and the two-phase flow ratio cannot be adapted. In addition, the tower equipment will destroy the material balance in the tower when it is stopped, and it will be very troublesome when it encounters frequent parking and driving operations. Because the parking destroys the material balance in the tower, the concentration distribution is completely disrupted, and it will be necessary to drive again. Re-establishing the material balance wastes time and material.

Therefore, in order to adapt to special liquid-liquid separation occasions and solve the existing industrial two-phase mixing-separation problems, there is an urgent need in this field to develop a method that can integrate mixing-separation, so that the two phases can be fully mixed and the mass transfer efficiency can be improved. High; while reducing the area and space occupied by the equipment, it is especially suitable for separating two-phase systems with small density difference, high viscosity, and easy emulsification, or dealing with new liquid-liquid two-phase materials that are prone to inactivation and variability due to long time Mixing-separating device.

Utility model content

The utility model provides a novel liquid-liquid two-phase mixing-separation device, which can effectively solve the problem of large investment, low mass transfer efficiency, small processing capacity and problems of current industrial liquid-liquid two-phase mixing-separation equipment. It is difficult to adapt to some special occasions (such as the need for rapid separation or easy emulsification, difficult separation system), which improves the mass transfer efficiency and separation ability, reduces the investment cost, and provides a new way for the separation of some special occasions , thereby solving the problems existing in the prior art.

The utility model provides a liquid-liquid two-phase mixing-separation device, comprising: a motor at the top, a transmission mechanism connected to the motor, a rotating shaft connected to the transmission mechanism, an upper bearing and a bearing seat connected to the rotating shaft, and a lower Bearings and housings, mechanical seals on the lower bearings and bearing housings, inner cylinder, outer cylinder, light phase weir and heavy phase weir in the inner cylinder, light phase collection chamber in the outer cylinder, light phase outlet, heavy phase collection Chamber, heavy phase outlet, light phase inlet and heavy phase inlet, support, shock absorber at the bottom of the support, and bottom vane at the bottom of the outer cylinder.

In a preferred embodiment, the motor is connected to the rotating shaft through a coupling.

In another preferred embodiment, the inner cylinder has an aspect ratio of 4:1 to 1:1.

In another preferred embodiment, the device includes a high-speed rotating inner cylinder and a stationary outer cylinder.

In another preferred embodiment, the inner cylinder is supported by double bearings.

Description of drawings

Fig. 1 is a structural schematic diagram of a liquid-liquid two-phase mixing-separation device of the present invention.

Fig. 2 is a schematic flow diagram of single-stage mixing-separation using the liquid-liquid two-phase mixing-separation device of the present invention.

Fig. 3 is a flow diagram of multi-stage mixing-separation using the liquid-liquid two-phase mixing-separation device of the present invention.

Detailed ways

After extensive and in-depth research, the inventor of the present utility model found that using such a liquid-liquid two-phase mixing-separation device, wherein there is a high-speed rotating inner cylinder and a fixed outer cylinder, the two-phase liquid Enter from the light phase inlet and the heavy phase inlet of the device respectively, and realize mass transfer through the sufficient mixing of the annular gap and the bottom blade; the mixed liquid enters the high-speed rotating inner cylinder under the action of self-suction, and realizes the two-phase separation under the action of centrifugal force . Based on above-mentioned findings, the utility model is accomplished.

The technical conception of the present utility model is as follows:

Taking the system with small density difference and high viscosity between the two phases as an example, if a mixing and settling tank is used, since it uses gravity to realize the mixing and separation of the two phases, the mass transfer efficiency is not high, and the separation time is long and the separation efficiency is low; If tower equipment is used, when the density difference between the two phases is very small (such as less than 0.05g/cm ³ ), it is difficult to achieve the separation of light and heavy phases, and the separation time of tower equipment is longer, and the investment cost is higher . Taking the system that is easy to emulsify as an example, the mixing and settling tank cannot be used because the separation time is too long, and the separation effect of the tower equipment is not ideal. The two-phase mixing-separating device provided by the utility model has the characteristics of compact structure, large processing capacity, stable operation, low power consumption, and convenient cleaning and maintenance. Since the centrifugal force can usually reach hundreds of times of gravity, it is especially suitable for processing two-phase density. For systems with small difference, high viscosity and easy emulsification, such as in the separation of gravity phase separation, the density difference between the two phases is required to be greater than 0.1g/cm ³ , but in this device, the density difference between the two phases can be as small as 0.01g/cm ³ . General equipment is not easy to mix the two-phase density difference or high viscosity system, but the device provided by the utility model has a powerful mixing function, which can fully mix the two-phase flow, so that the two-phase flow can be easily reacted or mass transfer. It is also easy to separate systems with small density differences or high viscosities. In this equipment, the mixing and separation of the mixture is almost simultaneously completed in one equipment, and the separation effect is particularly good, so the product quality and output can be improved, the process can be simplified, and the production cost can be reduced. The device provided by the utility model has the advantages of large operating flexibility, no blockage, short separation time, high efficiency, and can adapt to fluctuations in light and heavy phase content, and can effectively solve the problems encountered in the current industrial liquid-liquid two-phase mixing-separation problem.

The utility model provides a novel liquid-liquid two-phase mixing-separation device, which is mainly composed of a motor, a transmission mechanism, a rotating shaft, an upper bearing and a bearing seat, a lower bearing and a bearing seat, a mechanical seal, an inner cylinder, and an outer cylinder , light phase weir, light phase collection chamber and light phase outlet, heavy phase weir, heavy phase collection chamber and heavy phase outlet, light phase inlet, heavy phase inlet, support, shock absorber, and bottom blades.

In the utility model, the motor and the main shaft are connected by a shaft coupling.

In the present invention, the aspect ratio of the inner cylinder is 4:1 to 1:1.

In the utility model, the inner cylinder rotates at high speed, and the outer cylinder is fixed.

In the utility model, the inner cylinder is supported by double bearings.

In the utility model, the mass transfer between the two-phase fluids is realized through the annulus and bottom vanes of the device. Specifically, the heavy phase (generally the water phase) enters the heavy phase inlet of the device, and the light phase (generally the organic phase) enters the light phase inlet of the device; the light phase and the heavy phase are fully mixed through the annulus of the device to realize transmission The mixed liquid enters the high-speed rotating inner cylinder under the action of self-suction; due to the high-speed rotation of the inner cylinder, the mixed liquid is separated into new heavy phase and light phase under the action of centrifugal force; the above-mentioned separated heavy phase will enter the The heavy phase weir then flows out from the heavy phase outlet; the light phase enters the light phase weir and then flows out from the light phase outlet.

The utility model will be further described below in conjunction with the accompanying drawings, but it should be understood that they are only used to illustrate the utility model and are not intended to limit the scope of the utility model.

Fig. 1 is a structural schematic diagram of a liquid-liquid two-phase mixing-separation device of the present invention. As shown in Figure 1, the device includes: a motor 1 at the top, a transmission mechanism 2 connected to the motor, a rotating shaft 10 connected to the transmission mechanism, an upper bearing and a bearing seat 3 connected to the rotating shaft, and a lower bearing and a bearing seat 15, The mechanical seal 16 located on the lower bearing and the bearing housing, the inner cylinder 14, the outer cylinder 13, the light phase weir 7 and the heavy phase weir 4 located in the inner cylinder, the light phase collection chamber 8 located in the outer cylinder, the light phase outlet 9, the heavy phase weir Phase collection chamber 5, heavy phase outlet 6, light phase inlet 11 and heavy phase inlet 12, support 17, shock absorber 18 at the bottom of the support, and bottom blade 19 at the bottom of the outer cylinder.

Fig. 2 is a schematic flow diagram of single-stage mixing-separation using the liquid-liquid two-phase mixing-separation device of the present invention. As shown in Figure 2, the light and heavy phases enter the annulus between the inner cylinder and the outer cylinder respectively from the light phase inlet 11 and the heavy phase inlet 12 of the device, and the inner cylinder rotates at a high speed under the action of the motor, which also drives the annulus The light and heavy phase liquids between them make the light and heavy phases fully mixed to realize mass transfer; then the mixed liquid enters the inner cylinder from the bottom of the inner cylinder under the action of self-suction, and under the action of centrifugal force, the heavy phase is close to the inner wall of the inner cylinder, The light phase is close to the rotation axis, so as to realize the separation of the light and heavy phases; finally, the light and heavy phase liquids respectively pass through the light phase weir and heavy phase weir, light phase collection chamber and heavy phase collection chamber of the device, and are discharged from the light phase outlet 9 , The heavy phase outlet 6 flows out. Since the centrifugal force is far greater than the gravity, it has sufficient mass transfer and rapid phase separation, and is suitable for systems with small density difference, high viscosity and easy emulsification.

Fig. 3 is a flow diagram of multi-stage mixing-separation using the liquid-liquid two-phase mixing-separation device of the present invention. As shown in Figure 3, the light phase enters from the light phase inlet of the first stage, and the light phase from the light phase outlet of the first stage enters the light phase inlet of the next stage (from the second stage to the n-1th stage), until It flows out from the light phase outlet of the last stage (nth stage), and flows into the light phase inlet of the first stage after a regeneration cycle to form a light phase cycle; at the same time, the heavy phase flows from the heavy phase inlet of the last stage (nth stage). Entering, the separated heavy phase of the last stage flows into the heavy phase inlet of the upper stage from its heavy phase outlet (n-1th stage to the second stage), until it flows out from the heavy phase outlet of the first stage, after a regeneration cycle It also flows into the heavy phase inlet of the last stage to form a heavy phase cycle. Therefore, the light phase circulation and the heavy phase circulation flow countercurrently to realize multi-stage mixing-separation. Because the drums of each stage have the ability to suck the light phase and heavy phase of the two adjacent stages, it is easy to realize multi-stage mixing-separation without using pumps, and the increase and decrease of the number of stages is also very convenient.

The main advantage of the utility model is:

(a) The device integrates mixing and separation, and the contact time is short, which is especially suitable for processing materials that are prone to inactivation or variability due to too long time;

(b) Strong adaptability, will not affect the extraction effect due to changes in materials, can handle systems with small density difference and high viscosity between the two phases, and has strong anti-emulsification ability;

(c) The device is small in size, small in floor space and low in investment;

(d) The opening and stopping time is short, and the material balance will not be damaged.

Although the utility model has been described in detail for the purpose of clarity and understanding, after reading the description of the application, those skilled in the art will understand that, without departing from the spirit and essence of the utility model, the utility model can be Various modifications and changes are made to the utility model, and these modifications and changes all fall within the scope included in the appended claims and their equivalents.

Claims (5)

1. the device of liquid-liquid two-phase mixing-separation, it is characterized in that, this device comprises: the motor (1) that is positioned at the top, the transmission mechanism (2) that connects motor, the turning cylinder (10) that connects transmission mechanism, the upper bearing (metal) and the bearing block (3) that connect turning cylinder, and lower bearing and bearing block (15), be positioned at the mechanical seal (16) on lower bearing and the bearing block, inner core (14), urceolus (13), be arranged in the light phase weir (7) and the heavy phase weir (4) of inner core, be arranged in the light phase collecting chamber (8) of urceolus, light phase export (9), heavy phase collecting chamber (5), heavy out (6), light phase import (11) and heavy phase import (12), bearing (17) is positioned at the shock absorber (18) of rest base, and the bottom blade (19) that is positioned at outer tube bottom.

2. device as claimed in claim 1 is characterized in that, is connected by shaft coupling between described motor and the turning cylinder.

3. device as claimed in claim 1 is characterized in that, the draw ratio of described inner core is 4: 1 to 1: 1.

4. device as claimed in claim 1 is characterized in that, described device comprises the inner core and the fixed urceolus of rotation at a high speed.

5. as each described device among the claim 1-4, it is characterized in that the form that described inner core adopts duplex bearing to support.

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