CN-116657927-B - Construction method of non-standard tank with inner cone

CN116657927BCN 116657927 BCN116657927 BCN 116657927BCN-116657927-B

Abstract

The invention discloses a modularized construction method of a non-standard tank with an inner cone, which comprises the steps of firstly dividing tank modules into three modules according to the main structure form of a tar ammonia water separation tank; the first module is the lower half section of the tank, the second module is the upper half section of the tank, and the third module is an inner cone. And respectively prefabricating and assembling the three modules, respectively prefabricating the small inner cone modules outside the pipe, then hoisting the small inner cone modules of the third module into the first module for assembly in a segmented manner, hoisting the second module to the upper part of the first module, assembling and welding a circular seam between the two modules, and finally hoisting the assembled inner cone to a specified position and welding. According to the modularized construction process for the non-standard tank with the inner cone, disclosed by the invention, the high-altitude operation of traditional construction is transplanted to the ground to be completed, a proper structural combination is taken as a module unit, and the modular hoisting is performed after the prefabrication and the assembly, so that the working efficiency is improved, the construction cost and the safety risk are reduced, and the installation precision is greatly improved.

Inventors

XUE WEIHONG
LU HUIRU
GAO LIQUAN
HE YONGSHENG
LI ZHIGUO
BAI ZHENGYU
WU QIN
LIU CUILONG

Assignees

中化二建集团有限公司

Dates

Publication Date: 20260508
Application Date: 20230628

Claims (4)

1. The modularized construction method of the non-standard tank with the inner cone is characterized by comprising the following steps of: step one, dividing tank modules; Dividing the tar ammonia water separation tank into three modules according to the main structural form of the tar ammonia water separation tank, wherein the first module is the lower half section of the tank and comprises a bottom plate, an upper contact wallboard of an inner cone and a plurality of lower belt wallboards; Step two, prefabricating and assembling three modules Prefabricating and assembling the first module, namely firstly paving a bottom plate of the assembled and welded tank, then assembling and welding all the wall plates with the plates by adopting a flip-chip method, and welding the bottommost wall plate and the bottom plate after the assembly is completed; In the first module, four wallboards are assembled from bottom to top, when the wallboards are assembled and welded, longitudinal joints of the fourth wallboards are assembled and welded, the fourth wallboards are lifted after the assembly and welding are completed, longitudinal joint assembly and welding of the third wallboards are carried out, and after the assembly and welding are completed, the fourth wallboards are dropped and assembled and welded with the third wallboards to form a girth joint; Prefabricating and assembling a second module, namely assembling and welding top ring wall plates, and assembling and welding all the wall plates with the strips by adopting a flip-chip method; The second module comprises a sixth wall plate serving as a top ring wall plate and a fifth wall plate at the lower part of the sixth wall plate, wherein when the second module is prefabricated and assembled, the edge-wrapping angle steel, the tank top center ring and the tank top purline are installed after the sixth wall plate is assembled and welded; prefabricating and assembling the third module, namely prefabricating each small inner cone module outside the pipe respectively, and then hoisting the small inner cone modules of the third module into the first module for assembly in a segmented manner; The inner cone is divided into 9 sections for blanking prefabrication, wherein the 9 th section of inner cone is a top inner cone, the included angle between the 9 th section of inner cone and a tank wall plate is 30 degrees, and the included angle between the 1 st section of inner cone and the 8 th section of inner cone and the tank wall plate is 45 degrees; Firstly hoisting 2-4 sections of inner cones in a third module into a first module, supporting the inner cones by using channel steel after being in place, hoisting 5-6 sections of inner cones into the first module, performing assembly welding with 2-4 sections of inner cones, hoisting 7-8 sections into the first module, and performing assembly welding with 2-6 sections of inner cones; Step three, assembling the second module with the first module Hoisting the second module to the upper part of the first module, and then assembling and welding a circular seam between the two modules; step four, lifting and installing the inner cone And after the welding of the first module and the second module is finished, lifting the inner cone assembled in the second step to a designated position, welding, and then installing the top inner cone and the bottom inner cone.
2. The method of claim 1, wherein in the second step, the first module is prefabricated and lifted by an electric hoist.
3. The method according to claim 1 or 2, wherein in the second step, the second module is prefabricated and lifted by using a truck crane.
4. The method of claim 3, wherein in the fourth step, after the welding of the first module and the second module is finished, a plurality of manual hoists are uniformly arranged at the top of the tank, lifting lugs are welded on the inner cone, the inner cone is formally supported and welded after 2-8 sections of the inner cone are lifted to a designated position by the manual hoists, the 9 th section of the inner cone is installed in a segmented mode, and finally the 1 st section of the inner cone is installed in a machining mode according to the bottom size.

Description

Construction method of non-standard tank with inner cone Technical Field Nonstandard equipment suitable for on-site manufacturing and installation of chemical devices, and particularly relates to a construction method of a nonstandard tank with an inner cone. Background In the coking process, the discharged gas has strong corrosiveness and toxicity, and if the coke oven gas is not treated, the coke oven gas is directly discharged into the air, so that the serious waste of resources is caused, and the environment is also seriously polluted. At present, because China pays importance to the development of ecological environment, the coke oven is constructed at the same time, and the gas purification must be constructed at the same time and put into use at the same time. The tar ammonia water separation unit in the gas purification process is used for separating by the tar ammonia water separation tank according to different specific gravities of ammonia water and tar, so as to obtain a coal tar product. The tar ammonia water separating tank is used as main equipment for separating the tar ammonia water, has a complex structure, is internally provided with an inner cone, has up to 50 pipe orifices on a single tank body, and is sleeved with the adjusting device 3. Because the groove is internally provided with the inner cone, the traditional construction method can only be constructed by a normal installation method, and an outer scaffold is erected for installing the overflow pipe and the pipe orifice after the main body is constructed. The traditional construction method has the advantages of more high-altitude operation, low operation efficiency of constructors, long construction period and high construction cost. Disclosure of Invention The invention aims to solve the technical problem of providing a modularized construction method for a non-standard tank with an inner cone, so as to achieve the purposes of improving the efficiency of operators and machines, reducing the risk of high-altitude operation and shortening the construction period. In order to solve the technical problems, the invention adopts the following technical scheme: a modular construction method of an in-band cone non-standard tank comprises the following steps: step one, dividing tank modules; Dividing the tar ammonia water separation tank into three modules according to the main structural form of the tar ammonia water separation tank, wherein the first module is the lower half section of the tank and comprises a bottom plate, an upper contact wallboard of an inner cone and a plurality of lower belt wallboards; Step two, prefabricating and assembling three modules Prefabricating and assembling the first module, namely firstly paving a bottom plate of the assembled and welded tank, then assembling and welding all the wall plates with the plates by adopting a flip-chip method, and welding the bottommost wall plate and the bottom plate after the assembly is completed; Prefabricating and assembling a second module, namely firstly assembling and welding top ring wall plates, then assembling and welding all the wall plates with the plates by adopting a flip-chip method, and simultaneously installing an overflow groove and a foam baffle plate in the tank; Prefabricating and assembling the third module, namely prefabricating each section of small inner cone module outside the tank, and then hoisting the small inner cone module of the third module into the first module for assembly in a segmented manner; Step three, assembling the second module with the first module Hoisting the second module to the upper part of the first module, and then assembling and welding a circular seam between the two modules; step four, lifting and installing the inner cone And after the welding of the first module and the second module is finished, lifting the inner cone assembled in the second step to a designated position, welding, and then installing the top inner cone and the bottom inner cone. In the first module, four wallboards are assembled from bottom to top, longitudinal joints of a fourth wallboard are assembled and welded, the fourth wallboard is lifted after the assembly and welding are completed, longitudinal joint assembly and welding of a third wallboard are carried out, the fourth wallboard falls down to be assembled and welded with the third wallboard, the steps are repeated until the assembly and welding of the circumferential joints of the second wallboard and the first wallboard are completed, welding joints between the first wallboard and a bottom plate and welding joints reserved by the bottom plate are welded, and finally pipe orifices of the tank walls are installed. In the second step, when the first module is prefabricated and installed, the first module is lifted by adopting an electric hoist. The second module comprises a sixth wall plate serving as a top ring wall plate and a fifth wall plate at the lower part of the sixth wall plate, when