Construction method of double-housing large-scale low-temperature storage tank
A low-temperature storage tank and construction method technology, which is applied to building types, large-capacity bulk material storages, buildings, etc., can solve the problems of long construction period, difficult installation accuracy, and many installation hidden dangers, and achieves high installation accuracy and convenient construction. Safety and time-saving effect
Active Publication Date: 2013-12-18
CHINA CHEM ENG SECOND CONSTR
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Problems solved by technology
The common disadvantages of the methods currently used are long construction period, many hidden dangers in installation during construction, and difficulty in ensuring installation accuracy.
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[0022] The construction method of a double-hull large cryogenic storage tank according to the present invention comprises the following steps:
[0023] A. Flip-chip assembly outer tank
[0024] The outer tank wall is assembled and welded by strip plates, the lowest strip plate is the first strip plate, and the uppermost strip plate is the Mth strip plate. The assembly procedure of the outer tank wall is as follows: (1) Put the Mth strip plate Assemble with the M-1 belt plate, (2) Assemble the vault with the M-th belt plate, (3) Install the inner ceiling, (4) Assemble the M-2 belt plate to the M-1 belt plate in order from top to bottom 1 belt plate, (5) pair the 1st belt plate with the base plate;
[0025] When hoisting the outer tank, use 56 hoisting columns arranged on the bottom plate, and the hoisting columns are equipped with chain hoists to lift the outer tank wall belt plate;
[0026] The vault of the outer tank is a steel grid structure, and ring beams and pressure b...
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The invention provides a construction method of a double-housing large-scale low-temperature storage tank, which is high in mounting precision and convenient and safe for construction, and can shorten construction period. The construction method comprises the following steps: assembling an outer tank through an upside-down mounting method, wherein a steel net frame structure is arranged at the arch top of the outer tank; arranging an annular girder and a pressure-bearing ring on the edge of the steel net frame structure; assembling an inner tank through an upright method, wherein the annular girder on the arch top of the outer tank is taken as a track of an electric hoist and the annular girder is arranged right above a wall plate of the inner tank; and hoisting the wall plate of the inner tank through the electric hoist. The inner tank is made of X12Ni5 steel, and a 90-degree vertical angle is formed between a welding rod and the welded wall plate during welding. Compared with the existing construction method, the construction method of the double-housing large-scale low-temperature storage tank disclosed by the invention, has the advantages of high mounting precision, convenience and safety for construction and capability of shortening the construction period.
Description
technical field [0001] The invention relates to a construction method of a low-temperature storage tank, in particular to a construction method of a double-hull large-scale low-temperature storage tank. Background technique [0002] The large cryogenic storage tank is the core equipment of the cryogenic storage system. It is a storage tank used to store low temperature and atmospheric pressure chemical media such as low temperature ethylene, liquid ammonia, liquefied petroleum gas, propylene, and liquefied natural gas. The so-called cryogenic storage is to freeze the gaseous material below its boiling point and store the material in the form of liquid under normal pressure. Its outstanding advantages are safety, small footprint, large unit capacity, and low construction cost. The double-layer large cryogenic storage tank includes an inner tank and an outer tank. The vault of the outer tank is a large steel grid structure. The top pressure ring is made of δ=35 thick steel pl...
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IPC IPC(8): E04H7/06
Inventor 刘培智刘晨曦胡富申王丽霞胡青云彭义生
Owner CHINA CHEM ENG SECOND CONSTR