Gas washing and recovering device for preparing macromonomers of poly carboxylic acid water reducing agent

Abstract

The invention discloses a gas washing and recovering device for preparing macromonomers of a poly carboxylic acid water reducing agent and relates to the field of a gas washing device for synthetic resin. The device comprises a mixed gas inlet pipe, a coil pipe (which is formed by winding a pipeline into a circle), a water inlet pipe, an emptying pipe, a charging hopper, a grating and a ceramic ball or a glass ball. The mixed gas inlet pipe enters from the top of the recovering device and is connected with the coil pipe at the bottom of the recovering device. The coil pipe is provided with small holes with different sizes at equal distances. The diameters of the small holes are gradually increased from a gas inlet end to a far end. The small holes are positioned at the lower part of the coil pipe. The grating positioned above the coil pipe is provided with the ceramic ball or the glass ball. Gas is uniformly exhausted from the coil pipe. After the gas is in sufficient contact with a solvent, materials in the gas are totally adsorbed and at that time the gas can be exhausted without being subjected to tail gas treatment, and thus, not only are the production raw materials recovered and the production cost is saved, but also the effect of protecting the environment is achieved.

Description

technical field [0001] The invention relates to the technical field of gas scrubbers used for synthetic resins, in particular to a synthesis method for carrying water with nitrogen in the esterification reaction of polycarboxylate water reducers. Background technique [0002] When synthesizing resins such as alkyd and polyester, small molecules of water will be produced as by-products. In order to improve the reaction rate and degree of reaction, the small molecules of water must be continuously brought out during the reaction. For industrial production projects, nitrogen gas is introduced during the esterification process to continuously bring the generated water out of the reactor, and in the process of nitrogen gas bringing out small molecule water, some volatile reactants will also be brought out. Most enterprises do not carry out gas scrubbing and material recovery, let alone tail gas treatment. Very few companies use gas scrubbing devices simply by inserting gas pipes ...

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Problems solved by technology

At this time, the gas can be discharged without further tail gas treatment.

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