Purification equipment

I. Preface With the rapid development of industry, nitrogen has been widely used in chemical engineering, electronics, metallurgy, food, machinery and other fields. The demand for nitrogen in our country increases at a speed of more than 8% every year. The chemical property of nitrogen is not active, and it shows great inertia under normal conditions, so it is not easy to react with other substances. Therefore, nitrogen is widely used as protective gas and sealing gas in metallurgical industry, electronic industry and chemical industry. Generally, the purity of protective gas is required to be 99.99%, and some require high purity nitrogen of more than 99.998%. Liquid nitrogen is a relatively convenient cold source, which is more and more widely used in food industry, medical service and the seminal storage of animal husbandry. During the production of synthetic ammonia in the chemical fertilizer industry, if the mixture of hydrogen and nitrogen, the feed gas of synthetic ammonia, is...

In order to reduce the installation cost of the equipment, more and more air separation users require the cold box to be assembled when delivered from factory. The cold box packaging is to reasonably divide the functional modules in the design, complete the equipment manufacturing in the factory, and complete the product delivery in the form of modularization. Compared with the equipment parts leaving factory and on-site installation, the overall cold box can make full use of the perfect hardware facilities and good construction environment in the manufacturing plant, greatly reduce the on-site workload, improve the product quality control, speed up the construction progress and reduce the manufacturing cost.