Efficient multi-nozzle polyether polyol preparation device and process

Abstract

The invention relates to an efficient multi-nozzle polyether polyol preparation device and process, and especially relates to an improved system of one or two alkoxide and reaction liquid feeding modes in the polyether polyol preparation process. The device mainly comprises: a reactor cylinder; a prepolymer inlet; an alkoxide inlet pipe; a reaction liquid spiral mixing inlet pipe; a manhole; an agitator motor; a relief valve port; a vacuum outlet; a nitrogen inlet; atomizing nozzles; and a stirrer paddle, a material outlet and the like. According to the efficient multi-nozzle polyether polyol preparation device and process, the alkoxide and the reaction solution are premixed before entering the reactor, and 4-6 sets of atomizing nozzles can mix, atomize and spray out, so that the purposes of narrower molecular weight distribution and more homogeneous effect in organic polymer synthesis production are achieved.

Description

technical field [0001] The invention relates to a high-efficiency multi-nozzle polyether polyol preparation device and process, in particular to an improved system of one or two alkoxide feeding modes, which is mainly used in the field of polyether polyol preparation. Background technique [0002] The downstream application of polyether polyols is mainly in the polyurethane industry. Polyurethane products are advanced polymer composite materials, which are of great significance to promoting my country's energy conservation and emission reduction and the development of low-carbon economy. The polyurethane industry chain including raw material polyether polyols belongs to the recent years. In recent years, the new material industry, which is the focus of my country's development, has been affected by the transfer of production capacity in the global polyurethane industry, and the development momentum of the polyurethane industry has been good, driving the growth of demand for ra...

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Problems solved by technology

However, its reaction system is more complicated, consisting of three reactors or tanks, five heat exchangers and four pumps, which increases the control nodes and affects the product quality distribution;

[0006] (3) Patent CN106622091A discloses a multi-stage circulation symmetrical injection type epoxy compound polymerization reaction system and method. Although multi-stage circulation can make the molecular weight distribution narrower, the Venturi nozzle can only be used when the liquid level is below the lower end of the nozzle. It plays a more ideal role, and when the volume of the reactor increases, there will be a flow dead zone, and the molecular division will be uneven. Since the upper and lower nozzles are installed, if the desired effect can be achieved, the required initial dose will be larger. , not only can not produce high molecular weight products at one time, but also greatly increase the energy consumption of circulation equipment

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