Equipment and production process for producing sodium lignin sulfonate from paper-making sewage

The invention relates to equipment for producing sodium lignin sulfonate from paper-making sewage. The equipment comprises a paper-making waste liquid storage tank, wherein the paper-making waste liquid storage tank is connected to a molecular separation device; the macromolecule solute outlet of the molecular separation device is connected to a lignin collecting box; the micromolecule solute outlet of the molecular separation device is connected to a catch box; the lignin collecting box is connected to a dissolution and sulfonation device; the dissolution and sulfonation device is connected to a sodium lignin sulfonate generation device; the catch box is connected to a concrete additive preparation device. The invention further relates to a production process for producing sodium lignin sulfonate from paper-making sewage. The production process comprises the following steps: collecting waste water, separating and retaining, dissolving and sulfonating, generating, and preparing a concrete additive. The invention aims to provide equipment and the production process for producing sodium lignin sulfonate from paper-making sewage, pollution caused by separated paper-making waste water can be avoided, and meanwhile the separated paper-making waste water can be adopted to prepare the concrete additive for further use.