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Sinopec News Network reported at 11:40 on June 7th at the maintenance site of the continuous reforming unit of Cangzhou Refining & Chemical Corporation.
Following the whistle of the hoisting chief commander, the new weight weighed 62 tons, was about 23 meters high and had a diameter of 1.
5 meters.
The whole feed heat exchanger is hoisted in place smoothly
.
The replacement of the reforming feed heat exchanger is a key maintenance project for Cangzhou Refinery and Chemical this year
.
The original two feed heat exchangers are equipment from the old brother companies, and the total service life has reached 20 years
The new heat exchanger has a compact structure and adopts a tube-wound heat exchange method.
The heat exchange area is greatly increased compared with the original tube-and-tube heat exchange method.
One heat exchanger can satisfy production and operation
.
Since the thermal expansion of the heat exchange tube can be compensated by itself, the leakage of the heat exchange tube due to stress and deformation can be effectively avoided
Due to the heavy weight of the heat exchanger itself, coupled with unfavorable factors such as complex on-site environment, narrow working space, high lifting points, etc.
, the difficulty of lifting is increased
.
The fourth construction company of Sinopec was responsible for the lifting construction task.
On May 26, a 400-ton crawler crane entered the site, and the original two heat exchangers were removed on the 30th and 31st
.
The hoisting of the new heat exchanger officially started at 9:38 am on June 7
For hoisting, a 400-ton crawler crane is used as the main crane, and a 260-ton truck crane is responsible for the hoisting method of the slippery tail
.
Before hoisting, the relevant technicians performed repeated calculations to dismantle part of the platform and supports to reduce the height of the hoisting point, reduce safety risks, and free up space for hoisting
In the actual hoisting process, the new heat exchanger needs to traverse a 7-layer steel structure.
The minimum gap between the main body of the equipment and the steel structure is only 50 mm.
A slight shaking may cause deformation of the insulation support around the heat exchanger and affect the installation quality
.
For this reason, the second oil refining department where the device is located has specially arranged for the technical backbone of the post to watch the site in different areas, and promptly remind the construction staff to suspend the lifting for inspection when abnormality is found
After nearly two hours of intense lifting operations, the new reforming feed heat exchanger was successfully installed at 11:40
(Zhang Yuanwang)
