Low-constant-temperature synthesis reaction device for polycarboxylate superplasticizer

Abstract

The invention discloses a low-constant-temperature synthesis reaction device for a polycarboxylate superplasticizer, and relates to the field of synthesis of polycarboxylate superplasticizers. The low-constant-temperature synthesis reaction device comprises a reaction kettle, a cooler and a heat exchanger, wherein the top part of the reaction kettle is provided with a feeding inlet and an additionopening; the bottom part of the reaction kettle is provided with a discharging outlet; the shell of the reaction kettle is provided with an interlayer; the lower part of the interlayer communicates with a cooling water inlet pipe; the upper part of the interlayer communicates with a cooling water outlet pipe; the cooler communicates with the other ends of the cooling water inlet pipe and the cooling water outlet pipe; the heat exchanger comprises a plurality of heat exchanger sheets which are connected in parallel; two adjacent heat exchanger sheets respectively communicate with the reactionkettle and the cooler; a liquid inlet pipe and a liquid outlet pipe communicate with and are arranged between the reaction kettle and the heat exchanger; and a water inlet pipe and a water outlet pipecommunicate with and are arranged between the cooler and the heat exchanger. According to the synthesis device provided by the invention, a reaction liquid and cooling water in the cooler are respectively introduced into adjacent heat exchanger sheets, so the reaction liquid is circularly and continuously cooled; the cooling efficiency and the synthesis effect are greatly improved; and a temperature can be kept constant all the time.

Description

technical field [0001] The invention relates to the field of synthesis of polycarboxylate water reducers, in particular to a low constant temperature synthesis reaction device for polycarboxylate water reducers. Background technique [0002] Polycarboxylate superplasticizer replaces the previous generation of naphthalene-based superplasticizer and is called the third generation of high-performance superplasticizer. There are no "three wastes" in the production process, and it is a green and environmentally friendly material. The macromonomers used in domestic polycarboxylate superplasticizers have gradually developed from the initial low-activity APEG to high-activity TPEG and HPEG, and the development from low-activity to high-activity macromonomers is in line with the historical development trend of water reducers. [0003] A few days ago, another kind of vinyl ether polyethylene glycol high activity macromonomer (VPEG, EPEG) appeared on the market. Due to the high activit...

AI Technical Summary

Problems solved by technology

At present, the cooling of the reactor is generally completed by passing cooling water through the jacket. The completion of this operation takes a long time and consumes a lot of energy, and the cooling speed and effect are extremely difficult to control the low temperature and maintain a constant temperature.

Images