Drum-type ball-milling evaporator

Abstract

The drum-type ball-milling evaporator comprises a heat insulation shell, a volute inner container and two hollow shafts, one hollow shaft is in transmission connection with a volute driving device, a feeding device penetrates through the volute driving device and the hollow shaft connected with the volute driving device, the discharging end of the feeding device is located in the volute inner container, and the discharging end of the feeding device is located in the volute inner container. A steam feeding pipe used for supplying low-pressure steam to the volute inner container penetrates through the other hollow shaft, and the volute inner container is filled with a grinding body; the high-salt concentrated solution is sprayed to the volute inner container and then falls on the inner wall of the volute inner container and the surface of the grinding body, moisture in the concentrated solution is evaporated and crystals are formed under the heating action of the fed low-pressure steam, the matched heat transfer area of the volute inner container and the grinding body is greatly increased, and the crystals are dynamic and dry solid particles all the time after being formed and discharged. The device is easy to discharge, does not cause blockage of a discharge port, eliminates shutdown dredging work, is favorable for improving the treatment efficiency, is low in manufacturing cost and operation cost, and is easy to popularize and use in small and micro-scale enterprises.

Description

technical field [0001] The invention relates to the technical field of separation of high-salt concentrated liquid in the reuse and treatment of industrial wastewater, in particular to a drum-type ball mill evaporator. Background technique [0002] Steel, petrochemical, non-ferrous metals, textiles, papermaking, food and other industries consume a large amount of clean water resources during the production process, and also generate a large amount of industrial wastewater simultaneously. Therefore, industrial wastewater reuse treatment is required to save water. the purpose of the resource. To this end, all departments have also issued implementation plans on the recycling of industrial wastewater. The plan requires that by 2025, the reuse rate of industrial water above designated size should reach about 94%, especially in industries such as iron and steel, petrochemical chemicals, and non-ferrous metals above designated size. The reuse rate of industrial water should be fu...

AI Technical Summary

Problems solved by technology

Since the concentrated solution is not only rich in miscellaneous salts, but also contains a large amount of organic matter, calcium and magnesium ions, sulfate radicals and other substances, the above substances are easy to scale on the surface of heat exchange equipment, evaporation equipment, etc. during water recovery. It not only affects the separation efficiency, but also easily blocks various outlets on the equipment, resulting in increased energy consumption during the separation process and frequent shutdowns for cleaning

[0004] With the development of industrial wastewater reuse technology, a more efficient cloth membrane distillation drying crystallization system has been developed and utilized abroad. This system uses an internally installed scraper to deal with scaling and clogging problems, although the efficiency has been eliminated to a certain extent. Low cost and frequent downtime for cleaning, but the cost of the system itself is very high. In addition, the scraper is frequently used and worn quickly. In order to ensure the cleaning effect, the scraper needs to be replaced or maintained frequently. The scraper material and structure are special, so the price is also very expensive. , so it is difficult to promote the use of small and medium-sized enterprises

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