CN204395871U - Base polyurethane prepolymer for use as emulsifying systems - Google Patents

Abstract

The utility model discloses a kind of base polyurethane prepolymer for use as emulsifying systems, described system comprises a technique water pump and an oligomer pump, technique water pump is all connected with the liquid feeding end of static mixer with the outlet end of oligomer pump, hybrid chamber is provided with in static mixer, the outlet end of this static mixer is connected with the liquid feeding end of emulsifying kettle, the dehvery lift of this oligomer pump is 0.2Mpa-0.4Mpa, and the dehvery lift of technique water pump is 0.2Mpa-0.4Mpa.System adopts Liquid-liquid mixing device continuous emulsification, utilizes the high efficiency dispersion function of static mixer to carry out the emulsification of oligomer.Effectively improve the stability of product quality, guarantee that follow-up emulsifying kettle equipment operates steadily, stop potential safety hazard, greatly reduce the power of emulsifying kettle motor simultaneously.

Description

Polyurethane prepolymer emulsification system

technical field

The utility model relates to the technical field of a polyurethane emulsion production system, in particular to a polyurethane prepolymer emulsification system, in particular to its system connection structure.

Background technique

To produce polyurethane emulsion, the first step is to produce polyurethane oligomers. Then, disperse the oligomer into a polyurethane emulsion in a short time with process water that is 2-3 times the weight of the oligomer at about 10°C. The dispersion effect affects the quality of the emulsion and determines the stability of the emulsion.

Before, the oligomer was put into the emulsification tank, and then the process water at 10°C was quickly added. At the same time, it becomes an emulsion under rapid stirring at 240 rpm. Due to the high viscosity of oligomers (4000-6000cps) and high stirring resistance, the power of the stirring motor is required to far exceed the stirring power of conventional reactors. For example, a single tank of 1.2 tons of emulsion requires a 22KW motor, and due to the large viscosity difference between the oligomer and the process water, the resistance of the stirring paddle is greatly different and unstable, resulting in serious vibration of the emulsification tank, which brings equipment and safety hazards.

Contents of the invention

The purpose of this utility model is to provide polyurethane prepolymer emulsification system, adopt liquid-liquid mixer to emulsify continuously, utilize the efficient dispersion function of static mixer to carry out the emulsification of oligomer, the oligomer viscosity after continuous emulsification is greatly reduced, and The uniformity of the emulsion is also effectively improved, requiring the stirring power of the reactor to be greatly reduced to avoid excessive vibration of the emulsification kettle in the working state.

In order to achieve the above object, the technical solution of the utility model is: a polyurethane prepolymer emulsification system, characterized in that: the system includes a process water pump and an oligomer pump, and the liquid outlets of the process water pump and the oligomer pump are both It is connected to the liquid inlet of the static mixer. The static mixer is equipped with a mixing chamber. The liquid outlet of the static mixer is connected to the liquid inlet of the emulsification tank. The delivery head of the oligomer pump is 0.2Mpa-0.4Mpa , The delivery head of the process water pump is 0.2Mpa-0.4Mpa.

The utility model discloses a polyurethane prepolymer emulsification system. The system adopts a liquid-liquid mixer for continuous emulsification, and utilizes the high-efficiency dispersion function of a static mixer to emulsify oligomers. It effectively improves the stability of product quality, ensures the smooth operation of subsequent emulsification kettle equipment, eliminates potential safety hazards, and greatly reduces the power of the emulsification kettle motor. The overall design of the system is reasonable, ingenious in conception, has good practicability, and is easy to popularize and apply.

Description of drawings

Fig. 1 is the schematic diagram of the utility model system.

in:

1. Process water pump;

2. Oligomer pump;

3. Static mixer;

4. Emulsification kettle.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

The utility model discloses a polyurethane prepolymer emulsification system, which is different from the prior art in that: the system includes a process water pump 1 and an oligomer pump 2, and the liquid outlets of the process water pump 1 and the oligomer pump 2 are both It is connected to the liquid inlet end of the static mixer 3, and the static mixer 3 is provided with a mixing chamber, and at least one helical stirring roller is arranged horizontally in the mixing chamber, and the surface of the stirring roller is distributed with spiral patterns, which is convenient for improving the mixing effect. And the low speed is convenient to control the stability of the equipment. The liquid outlet of the static mixer 3 is connected to the liquid inlet of the emulsification tank 4. The conveying head of the oligomer pump 2 is 0.2Mpa-0.4Mpa, and the conveying head of the process water pump 1 The delivery head is 0.2Mpa-0.4Mpa, which can ensure efficient dispersion and continuous emulsification of oligomers and process water in the mixing chamber of the static mixer.

In the specific implementation, the process principle of this system is: oligomer pump (0.3Mpa) + process water pump (0.3Mpa) + emulsification kettle, among which, the power of the oligomer pump is 1.1KW, and the power of the process water pump is 2.2KW. The stirring power of the emulsification tank is 3KW.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model, and any associated technology Those who have ordinary knowledge in the field, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all without departing from the technical solutions of the present utility model The content of the scheme, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (1)

1. base polyurethane prepolymer for use as emulsifying systems, it is characterized in that: described system comprises a technique water pump (1) and an oligomer pump (2), technique water pump (1) is all connected with the liquid feeding end of static mixer (3) with the outlet end of oligomer pump (2), static mixer is provided with hybrid chamber in (3), the outlet end of this static mixer (3) is connected with the liquid feeding end of emulsifying kettle (4), the dehvery lift of this oligomer pump (2) is 0.2MPa-0.4MPa, and the dehvery lift of technique water pump (1) is 0.2MPa-0.4MPa.