An industrial waste salt resourceful treatment method comprises the following steps: the industrial waste salt is sequentially subject to dissolving, chemical pre-purification, deep purification, organic matter concentration reduction, adsorption and oxidation decolorization and multi-effect evaporative crystallization to respectively obtain sodium sulfate, sodium chloride and sodium nitrate crystals; the crystallization temperature of sodium sulfate is in a range of 75° C. to 85° C.; the crystallization temperature of sodium chloride is in a range of 60 to 70° C.; and the crystallization temperature of sodium nitrate is in a range of 45° C. to 55° C. An industrial waste salt resourceful treatment device is further provided.
A flat membrane support plate includes a connection portion, a honeycomb structural portion and a support portion. The connection portion is configured to connect a diaphragm to the flat membrane support plate in a sealing manner, is arranged at a periphery of the flat membrane support plate, and is provided with at least one water outlet. The honeycomb structural portion is arranged on the flat membrane support plate in an area enclosed by the connection portion, is provided with a first flow channel for communicating with an interior of the entire honeycomb structural portion and communicating the honeycomb structural portion with the water outlet. The support portion is configured for reinforcing the honeycomb structural portion and is arranged between the honeycomb structural portion and the connection portion.
C02F 103/00 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter
B01D 29/00 - Filtres à éléments filtrants stationnaires pendant la filtration, p. ex. filtres à aspiration ou à pression, non couverts par les groupes Leurs éléments filtrants
3.
METHOD AND DEVICE FOR RESOURCEFUL TREATMENT OF INDUSTRIAL WASTE SALT
Provided are a method and a device for the resourceful treatment of an industrial waste salt. The method comprises the following steps: subjecting the industrial waste salt to dissolution, chemical pre-impurity-removal, deep impurity removal, organic matter concentration and reduction, adsorptive and oxidative decolorization and multi-effect evaporation and crystallization successively to obtain sodium sulfate, sodium chloride and sodium nitrate crystals, respectively, wherein the crystallization temperature of sodium sulfate is 75-85ºC; the crystallization temperature of sodium chloride is 60-70ºC; and the crystallization temperature of sodium nitrate is 45-55ºC. In the present method, organic matter and other impurities in the industrial waste salt are firstly removed, and then, using the difference of the co-saturation point of three phases of the sodium chloride, sodium nitrate and sodium sulfate at different temperatures and the solubility of the salts, the salts are separated and crystallized by controlling the temperature during the evaporation, and the purity and whiteness of the obtained sodium chloride, sodium nitrate and sodium sulfate all reach an industrial standard, and same can be directly used.
Disclosed is a flat membrane supporting plate (1), comprising a connecting part (11) configured to connect a membrane piece to the flat membrane supporting plate (1) in a sealing manner; the connecting part (11) is arranged at the periphery of the flat membrane supporting plate (1); and at least one water outlet (111) is arranged on the connecting part (11); a honeycomb structural part (12) which is located in an area enclosed by the connecting part (11) on the flat membrane supporting plate (1); and a first flow channel (123) is arranged in the honeycomb structural part (12), the first flow channel ensures the intercommunication between the entire honeycomb structural part (12) and the intercommunication between the honeycomb structural part (12) and the water outlet (111); and a supporting part (13) configured for reinforcing the honeycomb structural part (12) and arranged between the honeycomb structural part (12) and the connecting part (11).
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