The second phase of Zhejiang Petrochemical project has fully entered the production and operation stage!

 On May 18, 2022, the 2# 3 million t/a slurry bed residual oil hydrogenation unit of Zhejiang Petrochemical Phase II project was successfully commissioned and produced qualified products, marking that Zhejiang Petrochemical Phase II project has fully entered the production and operation stage
.

Let's review the construction process of the device together!

In early summer, on Yushan Island, Zhoushan, Zhejiang, sets of petrochemical installations were bathed in gusts of sea breeze
.
In this sea breeze, we smelled the breath of builders, and heard the youthful songs of Shijian employees on the isolated island to "make new contributions and make better achievements"
.

2 sets of slurry bed residue hydrogenation units

As the leading project of the Zhejiang Zhoushan green petrochemical base project, the construction of two sets of residual oil hydrogenation and high-pressure polyethylene units in the Zhejiang Petrochemical Phase II Project has attracted the attention of colleagues in the petrochemical industry
.
During the construction of the project, the tenth construction company of refining and chemical engineering has carefully managed and organized in an orderly manner, and realized the on-site soilless, steel structure equipment modularization, welding automation, construction management informatization, pipeline construction orderly, and pressure test and sweeping procedures.

change .
4 sets of large-scale plants, soilless in 3.
5 months, 6,000 tons of slurry bed hydrogenation reaction frame with a height of 125 meters was capped in 6 months, and the main body installation and pressure test work of two sets of 300,000 tons of high-pressure polyethylene completed in 6.
5 months , Shijian speed has created the miracle of Yushan!

On May 18, the 2# 3 million t/a slurry bed residual oil hydrogenation unit of Zhejiang Petrochemical Phase II Project undertaken by Shijian Company was successfully put into operation and produced qualified products, marking the full entry of Zhejiang Petrochemical Phase II project into production In the operation stage, it created the fastest speed among the ten construction companies in the construction of similar devices
.
The owner unit said in the thank you letter: "Since taking over the second phase project, your company has always maintained a dedicated work attitude, a serious and responsible work >
.
It has undertaken the construction of the 2*3 million tons/year pulp of Zhejiang Petrochemical Phase II.
The state bed residue hydrogenation unit, 1# 300,000 tons/year LDPE-EVA unit, and 1# 400,000 tons/year LDPE unit were all successfully completed and put into operation.
The spirit of all members of the project department to fight tough battles and unite and cooperate has left us with A deep impression, fully reflects the level and >
.

Slurry bed residue hydrogenation unit and high-pressure polyethylene unit are the most difficult projects to construct in Zhejiang Petrochemical Phase II refining and chemical area respectively
.
The high-temperature thick-walled pipeline of the slurry bed installation is about 120,000 inches, and the materials are complex, including TP347/TP347H/P11/P22/P5/P9/N08825 alloys and stainless steel materials.
The pipeline welding heat treatment process is complicated, and the control requirements are high.
The cycle is long and the pressure test is difficult
.
The slurry valve of the installation is irregular in shape and weighs up to 10t.
It is complicated to install, difficult to manufacture and has a long supply cycle.
Among them, the valves imported from abroad, affected by the epidemic, took a year and a half to arrive one after another
.

The high-pressure polyethylene unit reaction dam mass concrete, high-pressure pipeline construction, and compressor construction are all key and difficult construction sites
.
The reaction dam is 18.
5 meters high and 1.
4 meters thick at the thickest part, so it is difficult to support the formwork and the overall pouring is difficult; there are 192 reactor columns, and the relative position offset does not exceed 1mm.
The adjustment accuracy is harsh and the adjustment is difficult
.
One high-pressure pipeline needs to be adjusted for acceptance, and the foreign-invested acceptance procedures are complicated and the construction progress is difficult to speed up
.
The compressor needs to be carefully checked from the foundation construction to the unit installation.
Any excessive deviation may lead to unstable operation of the compressor; the unit arrives in bulk, and needs to be assembled and assembled on site with many parts and high acceptance accuracy
.

"Acetylene-oxygen flame cutting emits carbon dioxide.
It is recommended to use intelligent mechanical processing equipment to reduce carbon dioxide emissions in professional construction prefabrication such as steel structures and pipelines
.
" Opened Shijian Company's Zhejiang Petrochemical Phase II project plan, low The concept of carbon environmental protection runs through it
.

During the construction of the second phase of Zhejiang Petrochemical project, the project department was faced with a wide range of construction sites and a large amount of construction materials, resulting in a large amount of carbon dioxide emissions due to flame cutting
.
Guided by the optimization of the construction technology model, they have made every effort to reduce the frequency of flame cutting during the construction process and reduce carbon dioxide emissions through the implementation of construction technology innovations such as intelligent CNC machining
.

 "When processing pipe grooves, use a smoke-free and pollution-free mechanical beveling machine with high efficiency and accurate precision; use a CNC cutting band saw for cutting construction materials to reduce carbon dioxide emissions
.
" Accelerate the pace of carbon dioxide emission reduction in the construction process to achieve The low-carbon environmental protection construction goals of various professions have become the consensus of the engineering and technical personnel of the project
.
According to statistics, by optimizing the construction organization mode of the project, the frequency of flame cutting is reduced by about 55% compared with the past, effectively reducing carbon dioxide emissions
.

At the same time, the project department implemented modular construction of steel structures, equipment and pipelines to improve the use efficiency of large-scale machinery and equipment and reduce exhaust emissions from lifting and transport vehicles
.
During the construction of the slurry bed residue hydrogenation unit, the project department carried out unified transportation and centralized hoisting of the steel structure frame.
The frequency of use of large cranes and transportation vehicles was reduced by 60% compared with the original plan, and the exhaust gas and carbon dioxide emissions of the vehicles were reduced accordingly
.

 "Management Innovation + Work Efficiency Improvement"---To fully realize the goal of project construction, tackling difficulties and creating benefits

"The steel structure frame of the reactor of the 1# slurry bed residue hydrogenation unit was successfully capped for (6) months, and the construction period was shortened by nearly (50) days
.
" Jiang Longguan, the project manager, looked at the construction progress and cost control data.
He showed a satisfied smile: "Modular construction of steel structure is really a 'sharp tool' for project lean management
.
"

Facing the heavy construction tasks and the high cost pressure of labor and equipment for the Zhejiang Petrochemical Phase II project, the project department set up a modular construction work team according to the professional construction layout and characteristics of steel structures, equipment, process pipes, etc.
, with scientific deployment and careful planning.
Coordinate and control the construction progress and minimize operating costs
.

Relying on the reserved land for the tank farm next to them, they implemented modular construction for the steel structure of the two sets of 3 million tons/year slurry bed residue hydrogenation units under construction.
The engineers and technicians optimized the steel structure frame into (11) large module, to achieve unified blanking, centralized welding, and integrated installation
.
The steel structure modular construction rate of the project has reached (60)%, and the steel structure construction schedule is nearly (50) days ahead of the original plan, which greatly relieves the project labor, machine tool cost and construction period pressure
.
According to estimates, only in the modular hoisting of the steel structure frame, the use cost of large-scale machinery and equipment has been reduced by (17)% compared with the original plan, and the modular construction of the steel structure has become the biggest benefit growth point in the project operation
.

Faced with the total installed capacity of process pipelines with a diameter of 1.
68 million inches in 4 sets of large-scale installations, the project department actively innovated the construction technology management mode, focusing on accelerating the promotion and application of the application of innovative achievements in automatic welding technology, and taking pipeline processing plants as the main focus.
The main position has successively deployed (29) sets of the most advanced automatic welding machines in China.
A total of (590,000) inch diameter process pipes have achieved the goal of automatic welding, accounting for (35.
1)% of the total, which has taken off for the project construction.
wings
.

"Strictly control the major cost of project operation, and plug the small cost loopholes in construction operations.
In the future, we will take the modular construction strategy as the guide, and make construction technology innovation a new driving force for project operation to improve quality and efficiency
.
" Wang Kun, deputy general manager of the company and director of the Zhejiang Petrochemical Phase II project, said
.