Pure Nickel (N4) Falling film concentrator

Falling film concentration tube works

The falling film evaporator is a specialized type of heat exchanger that is designed for the continuous concentration of heat-sensitive liquids such as caustic soda and flake soda.

The falling film evaporator consists of a falling film concentration tube, a lye inlet box, an evaporation tank, and an outer tube. The lye inlet box is used for introducing the liquid feed into the system, while the outer tube is used for circulating a molten salt solution to maintain a constant temperature within the falling film concentration tube.

The falling film concentration tube is equipped with several blade installation rods that are spirally arranged from top to bottom. These rods are used to distribute the liquid film evenly across the inner wall of the falling film concentration pipe, thereby increasing the heat transfer rate between the heated surface and the liquid.

Furthermore, several film distribution grooves are evenly arranged on the circumference of the upper end of the falling film concentration tube in the lye inlet box. These grooves are used to distribute the liquid film evenly across the circumference of the falling film concentration tube, thereby ensuring that the liquid is uniformly heated.

To facilitate maintenance, a flange sealing is designed between the falling film concentrator extending into the evaporation tank and the evaporation tank. This allows for easy disassembly and reassembly of the evaporator components for cleaning and maintenance purposes.

Overall, the falling film evaporator is an effective and efficient method for the continuous concentration of heat-sensitive liquids.

Specification of falling film concentration tube

The specification of a falling film concentration tube for the concentration of heat-sensitive liquids such as caustic soda and flake soda would depend on a variety of factors, including the properties of the liquid being processed, the desired concentration level, and the operating conditions of the evaporator system.

Here are some general specifications that are considered for a falling film concentration tube:

1. Material: The falling film concentration tube is made from Pure Nickel (N4). The selection of the material would depend on the corrosiveness of the liquid being processed, as well as its thermal conductivity and mechanical properties.
2. Diameter: The diameter of the falling film concentration tube would depend on the desired flow rate of the liquid being processed, as well as the heat transfer rate required for the efficient concentration.
3. Length: The length of the falling film concentration tube would depend on the desired level of concentration and the residence time required for the liquid to be concentrated.
4. Blade installation rods: The blade installation rods are made from the same material as the falling film concentration tube, and are arranged in a spiral pattern along the length of the tube to promote even distribution of the liquid film.
5. Film distribution grooves: The film distribution grooves are evenly spaced around the circumference of the upper end of the falling film concentration tube, and are oriented tangentially to promote even distribution of the liquid film.
6. Interlayer: The falling film concentration tube is covered with an outer tube, forming a closed interlayer between the two tubes. This interlayer is used to circulate a molten salt solution to maintain a constant temperature within the falling film concentration tube.

Overall, the specification of a falling film concentration tube would depend on a variety of factors specific to the application and would require careful consideration of the properties of the liquid being processed and the operating conditions of the evaporator system.

Pure Nickel (N4) for falling film concentration tube

Pure Nickel (N4) is a commercially pure nickel that is often used in applications where corrosion resistance and high thermal conductivity are required. It is also known as N4.

A falling film concentrator made from N4 would be well-suited for the concentration of heat-sensitive liquids such as caustic soda and flake soda, as it offers excellent resistance to corrosion and high thermal conductivity, which helps to facilitate efficient heat transfer between the heated surface and the liquid.

In addition, N4 has good mechanical properties, including high strength and ductility, which make it easy to work with and form into the desired shape and size for the falling film concentrator.

Overall, a falling film concentrator made from Pure Nickel (N4) would be a reliable and durable solution for the concentration of heat-sensitive liquids, particularly in applications where corrosion resistance and thermal conductivity are critical factors.

Technical Improvement

Our company has conducted a series of research and development efforts in the structural optimization of falling film tubes. By redistributing the positioning holes on the outer tube of the falling film tube, we can enhance the turbulent effect of the molten salt in the jacket. The internal redistributor of the falling film tube has been improved through a multi-stage structure, resulting in improved film formation of the alkali solution inside the falling film tube. Additionally, our company has also developed nickel materials specifically for high-purity chlor-alkali applications, significantly enhancing the corrosion resistance of the falling film tube.