The type and production capacity of the diol synthesis tower you are using

Our company’s ligroin DN1200 synthesis tower uses ZFJ-cold-tube type internals designed and manufactured by the Mechanical Engineering Factory of Zhejiang University of Technology, with a production capacity of 95–105 tons per day.

Our company (Hebei Zhengyuan) has designed and manufactured its own DN1400 methanol synthesis tower, with an annual production capacity of over 40,000 tons.

The details of our factory are as follows: Plant 1: It uses type IIIJD2000 internals; the diameter is DN1600, with a net height of 16,000. The outer cylinder has a diameter of Ф1970×18816, while the inner cylinder has a diameter of Ф1576×18245. The volume is 19.3 m3; the dry area is 194 m2, and the power of the electric furnace is 2000 KW. Second branch company: For the ⅢJD2000 type internal components: DN1972, Hnet = 18000 mm; the outer cylinder has a diameter of DN2000 ； Catalyst basket: V㎝ = 33.9 m3, F: 250㎡ ； Electric furnace power: 2200KW. Annual production of 500,000 tons of ammonia

φ1 400 mm ZFJ cold-tube methanol synthesis reactor internals. Structural features of the φ1 400 mm ZFJ cold-tube methanol synthesis reactor internals: (1) The cold tube shell adopts a double-ring tube structure; there is no rigid connection between the inner and outer cold tube shells, allowing them to expand and contract independently due to temperature changes. Taking into account the strength compensation of the cold tube, corresponding improvements were made to its welded structure. Through the dual control of the air inlets in the inner and outer cold tube shells and the gas distributor in the air distribution box, gas is introduced into the inner and outer cold tube shells in proportion, ensuring that the temperature difference along the axial direction of the bed layer remains within the specified limits. (2) Considering the situation where a large volume of gas flows through the tower, the resistance to gas flow as it passes through the catalyst baskets is high. Without altering the existing structure, radial baskets can be installed at the bottom; by utilizing pressure differences, the direction of gas flow can be changed, thereby reducing resistance and increasing the contact time between the reaction gas and the catalyst, which in turn boosts the concentration of methanol at the outlet. (3) The bottom spiral plate heat exchanger features a compact and reliable structure, and a catalyst unloading mechanism can be installed as per the user’s requirements. (4) The on-site installation of internal components makes use of independent flexible expanded graphite or stainless steel wound gaskets, which offer good reliability and ease of installation, and are suitable for the characteristics of methanol catalysts, such as their short service life and frequent replacement.

Our company uses a φ1,000 mm methanol synthesis reactor interior component of the four-section, two-axis, two-diameter type, with a daily production capacity of 36 tons of ligroin; the system pressure drop is 0.4–0.5 MPa, but the temperature difference across the bed is relatively large.