当前位置: Home / Faq / Air separation parts FAQ /

Regulation of liquid nitrogen throttle valve

Regulation of liquid nitrogen throttle valve
Jul 04, 2022
Author: DEAR AST

The opening of the liquid nitrogen throttle valve not only affects the reflux ratio of the upper tower, but also affects the reflux ratio of the lower tower. When the opening is increased, the reflux ratio of the upper tower increases, while the reflux ratio of the lower tower decreases, the purity of the nitrogen in the upper tower increases, and the purity of the oxygen enriched night sky in the lower tower increases. However, after the opening is over, the purity of the liquid nitrogen decreases, and the reduction of the reflux ratio of the upper tower is also detrimental to the improvement of the purity of the liquid oxygen. Therefore, an equilibrium point should be found for the opening of the liquid nitrogen throttle valve. We can generally use the purity difference between liquid nitrogen and gas nitrogen to judge whether the opening is appropriate. Generally, the purity of the sprayed liquid nitrogen is equal to that of the upper tower gas nitrogen or the liquid nitrogen is slightly lower, indicating that the opening of the throttle valve is appropriate.

 

The second stage of DEAR intelligent control system will achieve accurate prediction and active regulation of local equipment. By collecting and analyzing the comprehensive data of different regions (including altitude, air temperature, air humidity, sunshine time, etc.), machine learning can be accurately related to the external environment of different regions. Achieve two purposes: 1. Accurately predict the safe service life of equipment operation in different regions, the best maintenance cycle of components, and the output and working conditions affected by seasonality; 2. According to the seasonal influence in a year, the operating parameters of the equipment are actively regulated.

DEAR Air Separation Solve YourRegulation of liquid nitrogen throttle valveYou can also learn about otherAir separation parts FAQ about DEAR Air Separation, and solve the problem for you.
Didn’t find the problem encountered?
Please contact live chat or email for quick help.
Related FAQ
More Related FAQ
on the tower on the section of the sealing plate and pure nitrogen export cap, coarse argon tower condenser coarse argon export cap must be removed on the ground, clear clean aluminum chips with clean white cloth or plastic wrap before lifting in place. During the lifting of aluminium pressure vessels and aluminium pipelines, the installation should take protective measures to prevent damage to the surface, such as rigging jacket rubber tube, rigging between with support to open. The...
2025.09.17
At present, there are two types of common condensing evaporators in domestic air separation units, plate fin condensing evaporator and tubular condensing evaporator. Tubular condensing evaporator is divided into three types: long tube, short tube and coil. The long tube and short tube are all in row. The tube is made of red copper and the tube sheet is made of brass. It is generally used in small and medium-sized air separation plants. Coil type is generally used for auxiliary condensing evaporator. Because there is no fixed liquid level in the coil, the heat transfer coefficient is small, so it has been gradually eliminated. The plate fin condenser evaporator is made of all aluminum structure, and the plate unit is arranged in vertical star shape. Its characteristics are compact structure, light weight, small volume and easy to manufacture. It is widely used in large and medium air separation plants. Due to the gradual enlargement of the air separation unit, the heat excha
2025.09.16
Need more information?
Contact us for more details about our air separation equipment, solutions and services.
Products
  • Large air separation
  • Small air separation
  • High purity nitrogen air separation
  • Liquefaction air separation
  • Complete air separation
  • Biogas purification
  • Air separation parts
Need more information?
Tel:+86-19837850537
© Kaifeng DEAR Air Separation Industry Co., Ltd.. All rights reserved.
Online
Inquiry
Email
Top