【Major Chemical Equipment】549 – Heat exchangers for ammonia feed and discharge in Shanxi manufacturing, 2021

The development of the feed and discharge heat exchangers took five months, from the initial technical preparations and arrival of materials at the site to the subsequent processing and manufacturing; it was completed on schedule despite the challenges posed by the pandemic as well as extreme heat and cold. This equipment is made of (15CrMoR+S30403) composite steel plates, with a total length of 21.7 meters and a diameter of 2.3 meters. It contains 7,268 heat exchange tubes (with a diameter of Φ14mm), weighs 173 tons, and falls under Category III pressure vessels. Upon receiving the manufacturing procedures issued by the company, the Heat Exchanger Plant has always adhered to the core production principles of \"ensuring safety, improving quality, and accelerating progress.\" It developed detailed evaluation plans, placed emphasis on strengthening communication with its work teams, and engaged in thorough discussions with customers and supervisors. Optimal improvement measures were formulated to address the key challenges encountered during the manufacturing process. This not only **increased the production efficiency of the equipment and reduced the manufacturing time, but more importantly, it ensured the quality of the equipment upon delivery as well as its safe operation, thereby winning the trust and support of customers.

Shanxi Axin New Energy Technology Co., Ltd.’s fine chemicals and new materials recycling project involves the production of 300,000 tons per year of methanol as well as ammonia, using coke oven gas as raw material. The project is located in the Fine Chemicals Park in Qingxu County, Taiyuan City, Shanxi Province. It aims to produce 300,000 tons per year of methanol and 68,000 tons per year of ammonia; in the future, additional new materials projects such as DMMn will be developed using the methanol produced, thereby extending the utilization of coke oven gas along the downstream industrial chain. Image: This project utilizes coke oven gas, a by-product of upstream coking processes, to produce methanol along with ammonia. It serves as a key link in Shanxi Xiaxin New Energy Technology Co., Ltd.’s fine chemicals and new materials recycling initiatives, providing raw materials for the development of fine chemicals in downstream applications. The total value of the general contract for this project is 806 million yuan, with a construction period of 16 months. The project covers an area of approximately 200 mu, and upon completion, it is expected to generate an annual after-tax profit of around 102 million yuan. The main construction components include: the coking section, which encompasses the coal preparation system, coke treatment system, coking facilities, desulfurization and denitration devices, coke quenching facilities, gas purification units, as well as various coal washing and other production facilities, along with the corresponding utility and auxiliary systems. The main equipment used is JNX2-70-2 type top-loading coke ovens, with 3×65+1×55 chambers. The chemical production system is part of the comprehensive utilization of coke oven gas; it includes compression units, purification units, methanol production units, ammonia synthesis units, air separation units, finished product storage areas, flares, and utility systems. It also encompasses the general layout within the site of the new facilities, storage and transportation systems, pipe galleries and underground pipelines, water supply systems, sewage treatment systems, power supply systems, road lighting, laboratory facilities, fire protection systems, telecommunications and information systems, landscaping, as well as necessary production support facilities and other auxiliary and supporting systems. Coke oven gas is used to produce methanol, liquid ammonia, and high-value fine chemical products such as DMMn.

It’s rare to find an equipment manufacturing enterprise in Shanxi