Product Details

Electroplating sludge plating industry wastewater treatment is the "final state", which contains a lot of copper, nickel, chromium, iron, zinc and other precious metals. Plating sludge mainly comes from the industrial electroplating plant various electroplating waste liquid and liquid through the liquid chemical treatment of solid waste generated, due to the different electroplating factory production process and processing technology, chemical composition of electroplating sludge equivalent Complex, mainly containing chromium, iron, nickel, copper, zinc and other heavy metal compounds and soluble salts.

Electroplating enterprises in the initial deal with electroplating sludge, the need to electroplating waste in a variety of heavy metal salts into the corresponding hydroxide and precipitation curing, so the general plating manufacturers in the treatment of electroplating waste have joined the relevant reduction Agents, neutralizers and flocculants and other chemicals, resulting in the electroplating sludge chemical composition increased, a variety of heavy metal compounds dispersed in the composition and the content is low. In particular, some electroplating enterprises use lime or calcium carbide as a neutralizer, and during the neutralization treatment, a large amount of gypsum or calcium hydroxide is generated through a chemical reaction, so that the total amount of electroplating sludge increases and the content of heavy metal components decreases, so that further Of the harmless treatment, separation and comprehensive utilization more difficult. According to our field surveys, the electroplating sludge produced by the new treatment generally has a high moisture content of 75% -80% and the content of chromium, iron, nickel, copper and zinc compounds is generally about 0-5% -3% Material), gypsum (calcium sulfate) content of 8% to 10%, other water-soluble salts and impurities content of about 5%.
Electroplating sludge dryer Overview:

The hollow shaft is densely arranged with wedge-shaped hollow blades, and the heat medium flows through the hollow shaft through the blades. The effective volume of heat transfer area is very large, the heat medium temperature from -40 ℃ to 320 ℃, can be water vapor, it can be liquid type: such as hot water, heat conducting oil. Indirect conduction heating, no carrying air to carry heat, heat are used to heat the material. Heat loss is only through the body insulation to the environment of heat. Wedge blade heat transfer surface with self-cleaning function. The relative movement between the material particles and the wedge surface produces a scrubbing action that scrubs the wedged surface attachment material and keeps the clean heat transfer surface in operation. Paddle dryer shell is W-type, the shell is generally arranged two to four hollow mixing shaft. The housing has a sealed end cap and cover to prevent material dust from leaking and collecting solvent vapor. Set a spike at the spout to ensure that the material level height, the heat transfer surface is covered by the material and give full play to its role. Heat medium through the rotary joint, through the shell jacket and hollow stirring shaft, hollow mixing shaft according to the type of heat medium and have different internal structure to ensure the best heat transfer.

Electroplating sludge dryer application:
● Paddle dryer has been successfully used in chemical, petrochemical, dyes, industrial sludge drying, papermaking sludge drying, printing and dyeing sludge drying, sludge and other areas of life. Equipment heat transfer, cooling, stirring the characteristics of the unit to enable it to complete the following operations: calcination (low temperature), cooling, drying (solvent recovery), heating (melting), reaction and sterilization.
● Stirring blades are heat transfer surfaces at the same time, increasing the heat transfer area within the effective volume of the unit and shortening the processing time. Wedge blade heat transfer surface has a self-cleaning function. Compression - Expansion Stir to mix the material evenly. Materials along the axial into a "plug flow" movement, in the axial interval, the material temperature, humidity, mixing gradient is very small.

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  Electroplating sludge dryer - electroplating sludge dryer