Supply of second-hand 6-ton enamel storage tanks

Supply of second-hand 6-ton enamel storage tanks

The quality of enamel equipment is not only related to the quality of the enamel, but also to the spraying technology selected for the enamel equipment. Simply put, cold spraying is the powder spraying operation carried out on the raw material of enamel equipment at room temperature, while hot spraying is the powder spraying operation carried out on the raw material of enamel equipment before it reaches a working state. Cold spraying facilitates the repeated grinding and refinement of steel billets and porcelain powder by workers, and the moisture in the porcelain powder naturally dries. Under this technology, the porcelain layer is thin (with a large effective thickness), and the firing process is repeated multiple times, resulting in higher costs; Hot spraying is carried out before the enamel equipment has cooled down. The moisture in the enamel powder is forced to dry through the uncooled steel plate, so the cycle is fast and the equipment output is large. Due to temperature issues, hot spraying powder can only cover each production defect and cannot be finely ground. Therefore, the enamel equipment has a thick porcelain layer and relatively low cost.

From this, it can be seen that although hot spray technology has fast production and thick porcelain layers (enamel equipment does not necessarily have thicker porcelain layers), it is prone to producing dark bubbles due to high-temperature operations, uneven porcelain thickness, and easy detachment of the entire porcelain surface. Although the cost of cold spraying is high and the production volume cannot be expanded, from the perspective of users, the production equipment is guaranteed, the porcelain layer is uniform (in compliance with standards), and each enamel coating is re inspected to ensure the high quality and quantity of the product.

After the enamel storage tank is made, its enamel layer experiences pre compressive stress, while the steel plate experiences pre tensile stress. Due to the correlation between prestress and coefficient of linear expansion and elongation, which are closely related to temperature, the working temperature of enamel storage tanks has a significant impact on their use. If the stress generated by the enamel exceeds its service stress due to large temperature changes, the enamel will be damaged. The main function of enamel storage tanks is to hold corrosive chemicals, such as various strong acids.

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Therefore, the enamel layer of the enamel storage tank undergoes rapid changes in temperature, making it extremely explosive. Therefore, enamel storage tanks have temperature resistance limits. The temperature should not exceed 200 ℃, and the resistance to sudden temperature changes and cold shocks should be less than 110 ℃ and 120 ℃, respectively. The temperature difference between the stored material and the tank temperature, as well as excessive steam during heating and rapid cooling, can also lead to porcelain explosion. So don't create a large temperature difference when storing liquids, otherwise it will damage the tank.
Enamel storage tanks have very poor impact resistance, and any metal or hard object that impacts them can cause enamel damage. Therefore, during the use of enamel storage tanks, it is necessary to strictly prevent any metal or hard objects from falling into the kettle. In case of blockage, a plastic rod must be used to clear it. During maintenance, the pot cover must be covered to prevent small pits or ceramic explosions caused by welding slag melting the porcelain surface.

The enamel storage tank is baked at a high temperature of about 900 ℃, and after cooling, special techniques are used to bond the enamel with the steel plate. Due to the lower coefficient of linear expansion and elongation of enamel compared to steel plates, the deformation of enamel glass after cooling is smaller than that of steel plates, causing enamel to be constrained by steel plates and generate compressive stress.
After the enamel storage tank is made, its enamel layer experiences pre compressive stress, while the steel plate experiences pre tensile stress. Due to the correlation between prestress and coefficient of linear expansion and elongation, which are closely related to temperature, the working temperature of enamel storage tanks has a significant impact on their use. If the stress generated by the enamel exceeds its service stress due to large temperature changes, the enamel will be damaged. The main function of enamel storage tanks is to hold corrosive chemicals, such as various strong acids.
Therefore, the enamel layer of the enamel storage tank undergoes rapid changes in temperature, making it extremely explosive. Therefore, enamel storage tanks have temperature resistance limitations Do not exceed a temperature of 200 ℃ for high temperatures, and withstand sudden temperature changes with a cold shock of less than 110 ℃ and a thermal shock of less than 120 ℃. The temperature difference between the stored material and the tank temperature, as well as excessive steam during heating and rapid cooling, can also lead to porcelain explosion. So don't create a large temperature difference when storing liquids, otherwise it will damage the tank.

Supply of second-hand 6-ton enamel storage tanks