CN102228811B - Stir-free mixing device - Google Patents

Abstract

The invention provides a stir-free mixing device, relating to a production device used in a chemical process. The stir-free mixing device comprises a mixing kettle (1), a circulating pump (2), a circulating pipeline (3), a turbulent pipe (4), a connecting pipeline and various accessories, wherein an inlet fluid distributor (5), an outlet fluid drainage pipe (6) and a deflection baffle (7) are fixedly arranged in the mixing kettle (1); part of or all circulating pipeline (3) is replaced by the turbulent pipe (4); and the turbulent pipe (4) is an empty pipe or a pipe filled with a chemical filler or a mixing element which plays a turbulent role on the fluid. The invention provides a using method of the stir-free mixing device. The stir-free mixing device provided by the invention has the advantages of low production cost, low energy consumption, good mixing effect, free maintenance, long average annual effective production time and obviously increased production efficiency, can be widely applied in a physical process and a chemical reaction process in a chemical production, and can be used for replacing a traditional mechanical mixing kettle type mixer.

Description

Mixing device without stirring

technical field

The invention relates to a chemical production device, in particular to a non-stirring mixing device replacing a mechanical stirring tank mixer.

technical background

Mixing is the process of dispersing two or more different substances between each other to achieve uniformity. Common mixing operations are mostly mechanical stirring. There are also airflow stirring or jet stirring to achieve mixing, but compared with mechanical stirring, the application is less. A device that mixes materials by mechanical stirring is called a stirred tank mixer. The stirred tank mixer has a wide range of applications. In the chemical industry, whether it is the production of bulk chemical raw materials or fine chemicals, mechanical mixing and mixing operations are widely used. Other industries such as petroleum, pharmaceuticals, pesticides, dyes, paints, fertilizers, etc. , are also widely used mechanical mixing operation. Stirring can promote the disturbance of materials, realize the uniform distribution of materials in the mixer, and achieve the purpose of enhancing mass transfer and heat transfer.

The structure of the stirred tank mixer includes a kettle body, a head, a connecting pipe, a transmission device, a stirring device, a packing seal or a mechanical seal device and various accessories. The most commonly used stirring devices are flat paddle type, propulsion type, frame type, anchor type, three-blade back-swept type, turbine type, etc.

Although the stirred tank mixer has a long history of use and a wide range of applications, there are still obvious deficiencies in the stirred tank mixer, such as high equipment cost and energy consumption, and the sealing device is easily damaged due to high force and leaks. The replacement of the sealing device will reduce the effective The production time, the material temperature and concentration distribution in the kettle are uneven.

It is very meaningful to provide a new high-efficiency mixing device that can overcome the shortcomings of the current stirred tank mixer to the greatest extent.

Contents of the invention

The invention provides a non-stirring mixing device . The non-stirring mixing device realizes mixing by fluid kinetic energy, and is widely used in various occasions requiring material mixing. The device has low cost, low energy consumption, good mixing effect, less maintenance during use, and long effective production time.

Technical scheme of the present invention is:

Non-stirring mixing device, including mixing tank, circulation pump, circulation pipeline, turbulence tube, connecting pipeline and various pipe fittings and accessories. The mixing tank is fixed with an inlet fluid distributor, an outlet fluid drainage pipe and a diversion baffle. Including that the material to be mixed enters the device in front of the circulation pump or the spoiler tube in proportion, flows through the spoiler tube while mixing, enters the mixing tank through the inlet fluid distributor, flows to the center of the mixing tank under the action of the diversion baffle, and mixes. Part of the fluid in the tank flows out of the mixing tank through the outlet fluid drainage tube to participate in the circulation; or the mixed material enters the spoiler tube in front of the circulation pump or the spoiler tube in proportion and mixes while flowing, and then enters the mixing tank through the inlet fluid distributor. No fluid circulation; or one or more materials to be mixed are added to the mixing tank in advance, and the circulation pump is started, and the other or more materials to be mixed enter the device before the circulation pump or before the spoiler tube, and are mixed in the spoiler tube and Two or more materials are used to achieve mixing under the joint action of the inlet fluid distributor, outlet fluid drainage pipe and diversion baffle in the kettle; or when the mixed materials are added to the mixing kettle, the circulation pump is started, and the materials are discharged in the spoiler tube, inlet The fluid distributor, the outlet fluid drainage tube, and the diversion baffle work together to achieve mixing or maintain mixing.

For the above-mentioned non-stirring mixing device, part or all of the circulation pipeline is a spoiler tube, and the spoiler tube is an empty tube or a chemical filler or a mixing element that disturbs the fluid is installed in the tube, or a commercially available static mixer is used as the spoiler tube . Spoiler tubes are used singly or in combination.

The above-mentioned non-stirring mixing device, the inlet fluid distributor fixed in the mixing tank is composed of curved pipes and straight pipes that have pores and are connected to each other. Arrangement; the outlet fluid drainage pipe fixed in the mixing kettle is a flush or plug-in nozzle. When the plug-in nozzle is used, the inside of the plug-in kettle is separated into pores for fluids at different heights in the kettle to enter; its The diversion baffle fixed in the mixing kettle is flat or curved, and the diversion baffle is arranged obliquely or vertically with the cylinder wall of the mixing kettle.

When the above-mentioned non-stirring mixing device is used in an occasion with heat transfer, part or all of the mixing tank and circulation pipeline are provided with jackets.

The present invention has the following advantages:

1. The present invention can be used for both continuous production and intermittent production;

2. The mixing device proposed by the present invention has low equipment cost and less energy consumption, and the mixing effect is obviously better than mechanical stirring and mixing;

3. The mixing device proposed by the present invention has a large heat transfer area and high heat transfer efficiency;

4. There is no mechanical stirring in the tank of the mixing device proposed by the present invention, and there is no need to maintain or replace the mechanical seal or packing seal used in the traditional stirring tank, which can increase the effective production time;

5. The materials to be mixed can be fed in proportion. When used in the reaction process, the materials participating in the reaction can be mixed rapidly through the spoiler tube, which can overcome the fatal shortcomings of uneven concentration distribution and local overheating in the traditional mechanical stirring mixing tank.

Description of drawings

Fig. 1 is the non-stirring mixing device schematic diagram that is made of mixing kettle, circulation pump, circulation pipeline, spoiler pipe and connecting pipeline;

Fig. 2 is the axial sectional schematic diagram of mixing kettle;

Figure 3 is a schematic cross-sectional view of the mixing tank.

Detailed ways

Embodiment one

Non-stirring mixing device, including mixing kettle 1, circulation pump 2, circulation pipeline 3, internally equipped with chemical filler spoiler 4, inlet of mixed material, outlet of mixed material and various accessories, and inlet fluid is fixed in mixing kettle 1 Distributor 5 is a horizontal ring pipe with round holes connected to each other and four vertical pipes evenly arranged; the outlet fluid drainage pipe 6 is fixed in the mixing kettle 1, which is a plug-in connection pipe, and there are four evenly opened in the part inserted into the kettle. The fluid at different heights in the kettle enters the axial long gap; the deflector baffle 7 fixed in the mixing kettle 1 is a flat plate arranged at an angle of 45 degrees to the cylinder wall of the mixing kettle 1 . The two materials participate in the mixing. Material A is in front of the circulation pump 2, and material B is in front of the spoiler tube 4. It enters the spoiler tube 4 in proportion, flows and mixes in the spoiler tube 4, and enters through the inlet fluid distributor 5. In the mixing kettle 1, it flows to the center of the mixing kettle 1 under the action of the diversion baffle 7, and part of the fluid in the mixing kettle 1 flows out of the mixing kettle 1 through the outlet liquid drainage pipe 6 and enters the circulation pump 2 to participate in circulation.

Said accessory of the present invention is valve, flow meter, thermometer, pressure gauge, safety valve, sight glass etc.

Embodiment two

The difference between the second embodiment and the first embodiment is that the spoiler tube 4 is a commercially available static mixer.

Embodiment Three

The third embodiment differs from the first embodiment in that the flow guide baffle 7 fixed in the mixing kettle 1 is a curved plate.

Embodiment four

The fourth embodiment differs from the first embodiment in that the outlet fluid drainage pipe 6 fixed in the mixing tank 1 is a flush connection.

Embodiment five

Embodiment 5 differs from Embodiment 1 in that the three materials participate in the mixing. Material A enters the spoiler tube 4 before the circulating pump 2, and material B and material C enter the spoiler tube 4 in proportion to the spoiler tube 4. Mix while flowing, and enter the mixing tank 1 through the inlet fluid distributor 5, without fluid circulation.

Embodiment six

Embodiment 6 is different from Embodiment 1 in that there is no stirring mixing device and no spoiler tube 4, a suspension continuously enters the mixing tank 1, circulates in the device through the circulation pump 2 and continuously leaves the non-stirring mixing device, and the mixing tank 1 liquid face remains stable.

Claims (6)

1. Non-stirring mixing device, including mixing kettle, circulation pump, circulation pipeline, turbulence pipe, connecting pipeline and pipe fittings, accessories, characterized in that the mixing kettle (1) is fixed with an inlet fluid distributor (5), an outlet Fluid drainage tube (6) and diversion baffle (7); the material to be mixed enters the device in proportion to the front of the circulation pump (2) or the spoiler tube (4), and is mixed while flowing through the spoiler tube (4). Enter the mixing tank (1) through the inlet fluid distributor (5), and flow to the center of the mixing tank (1) under the action of the diversion baffle (7), and part of the fluid in the mixing tank flows out through the outlet fluid drainage pipe (6) for mixing The kettle (1) participates in the circulation; or the material to be mixed enters the spoiler tube (4) in front of the circulation pump (2) or the spoiler tube (4) in proportion to mix while flowing, and then passes through the inlet fluid distributor (5) Enter the mixing tank (1), without fluid circulation; one or more materials to be mixed are added to the mixing tank (1) in advance, and the circulation pump is started, and the other or more materials to be mixed are in front of the circulation pump (2) or disturbed The front entry device of the flow pipe (4), under the joint action of the spoiler pipe (4) and the inlet fluid distributor (5), the outlet fluid drainage pipe (6) and the diversion baffle (7) in the mixing tank (1) Use two or more materials to achieve mixing; or put the materials to be mixed into the mixing tank (1), start the circulation pump, and the materials are in the spoiler tube (4), the inlet fluid distributor (5), and the outlet fluid drainage tube (6) , and the diversion baffles (7) achieve mixing or maintain mixing under the joint action. 2. The non-stirring mixing device according to claim 1, characterized in that, part of the circulation pipeline (3) is replaced by a spoiler tube (4); the spoiler tube (4) is provided with chemical fillers inside the tube to disturb the fluid The active mixing element, or a commercially available static mixer; the spoiler tube (4) is used alone or in combination. 3. The non-stirring mixing device according to claim 1, characterized in that the inlet fluid distributor (5) fixed in the mixing tank (1) is composed of curved pipes and straight pipes with pores and connected to each other. The tubes and straight tubes are arranged vertically, parallel to the wall of the mixing kettle (1) or at an inclined angle with the wall. 4. The non-stirring mixing device according to claim 1, characterized in that the outlet fluid drainage pipe (6) fixed in the mixing tank (1) is a flush or plug-in connection; the outlet fluid drainage pipe (6) ) is a plug-in connection, there are holes inserted into the inside of the kettle for fluids at different heights in the kettle to enter. 5. The non-stirring mixing device according to claim 1, characterized in that, the flow guide baffle (7) fixed in the mixing tank (1) is a flat plate or a curved plate, and the flow guide baffle (7) and the mixing tank (1) The cylinder wall is arranged inclined or vertically. 6. The non-stirring mixing device according to claim 1, characterized in that, when the device is used in heat transfer occasions, the mixing tank (1), circulating pipeline (3), spoiler tube (4) part or All are jacketed.

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