Non-scaling heating assembly and evaporative crystallization device with same

Abstract

The invention discloses a non-scaling heating assembly. The non-scaling heating assembly comprises a heater and a heat exchange tube arranged in the heater. The feed end of the heat exchange tube is communicated with a lower circulation feed tube through a forced circulation pump, the discharge end of the heat exchange tube is communicated with the feed end of a solid-liquid separator, the bottom of the solid-liquid separator serves as a solid discharge end, the solid discharge end is communicated with a particle storage tank, inert solid particles are added into the particle storage tank, and the discharge end of the particle storage tank is communicated with the heat exchange tube through a distributor. By means of the non-scaling heating assembly, the inert solid particles are added into the heat exchange tube, the scale induction period can be greatly prolonged, an existing scale layer can be flushed away, the cleaning period can reach 8,000 hours or above (in a continuous working state), the inner wall of equipment is kept bright and clean, the service life of the equipment is prolonged, and great economic benefits, environmental benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to a non-scaling heating component and an evaporation crystallization device comprising it. Background technique [0002] There are different degrees of fouling problems in the heaters of evaporation and crystallization devices, especially when the medium is inorganic salts such as sodium chloride, sodium sulfate, sodium hydroxide, magnesium chloride, magnesium sulfate, etc., and sewage treatment, food, sugar, paper, In the heaters of seawater desalination, oilfield wastewater, diaphragm caustic soda, ion membrane caustic soda and other evaporative concentration and crystallization devices, the fouling problem is very prominent due to the precipitation of dissolved substances in the feed liquid. Scaling is a common phenomenon in evaporative crystallization devices. Scaling of evaporative crystallization devices not only reduces the effective working volume of the equipment, increases thermal resistance and flow resistance, but als...

AI Technical Summary

Problems solved by technology

Scaling is a common phenomenon in evaporative crystallization devices. Scaling of evaporative crystallization devices not only reduces the effective working volume of the equipment, increases thermal resistance and flow resistance, but also reduces the heat transfer coefficient of the heating tube and reduces production capacity. Serious Scaling will also stop production, shorten effective production time, reduce equipment life and even damage equipment, and increase raw material and energy consumption

[0003] After scaling, the existing treatment methods generally adopt two methods of mechanical cleaning or chemical cleaning (according to the different scales, water-soluble method, pickling method, alkali boiling, mechanical descaling, corrosion inhibitor for pickling, etc. Ultrasonic cleaning and other methods), frequent mechanical cleaning will cause irreversible damage to the equipment, and chemical cleaning is easy to cause corrosion to the equipment, and will produce a large amount of cleaning wastewater containing chemical components, which will cause great pressure on the environment

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