The largest seawater desalination project evaporator made

On September 2, according to information, the Dongfang Electric seawater desalination project low-temperature multi-effect evaporator manufactured by Zhanghuaji Heavy Equipment, a wholly-owned subsidiary of Suzhou Tianwo Technology Co.
, Ltd.
, was recently completed and shipped successfully
.
This equipment is an important part of the EPC project of Hengli Petrochemical (Dalian) Refining & Chemical Co.
, Ltd.
's 20 million tons/year refining and chemical integration project 3×15,000 tons/day MED seawater desalination unit, and it is the domestic seawater desalination with the largest installed capacity at one time.
Device
.
? Zhanghuaji Heavy Equipment undertook Hengli Petrochemical’s 20 million tons/year refining and chemical integration project 3×15,000 tons/day MED device EPC desalination project in October 2017, including 3 sets of seawater desalination devices, each The evaporator device has a rectangular parallelepiped structure and is manufactured in three stages
.
The first stage is composed of flash chamber, first effect evaporator and second effect evaporator; second stage is composed of third, fourth and fifth effect evaporator; third stage is composed of sixth effect evaporator and seventh effect evaporator It consists of a condenser and a condenser
.
The maximum dimensions of the three-stage evaporator are 14690mm×10420mm×9530mm, 15400mm×10420mm×9530mm, 13290mm×10420mm×9530mm, and weigh 660 tons
.
? The evaporator shell is made of 10mm thick S32205 duplex stainless steel plate.
At the same time, the outside of the shell is reinforced with H-shaped stiffener.
The internal pipe partition and other parts are made of S32205/S32304 duplex stainless steel.
The thickness of the plate is the thickest.
10mm, the thinnest 1mm, the welding length of only 1mm steel plate in the equipment can reach 3.
8 kilometers, and there is no weld penetration, the total length level is controlled at 3mm.
The heat exchange tube uses 286975 thin-walled titanium tubes, and the heat exchange tubes are The tube sheet connection method is expansion joint
.
The internal structure of each effect evaporator is basically similar, and it is mainly composed of pipe partition components, spray baffle components, two-layer water chamber, foam trap, and maintenance platform
.
The main body of the device is manufactured in sections in the manufacturing plant and transported to the project location, where the connection with other supporting equipment is completed on site
.
? This project is the first time that Tianwo Technology has entered the field of desalination engineering equipment
.
During the manufacturing period, Zhanghuaji Heavy Equipment faced many problems such as large size, large overall weight, large floor space, strict material requirements, multiple cross operations, high manufacturing difficulties, many process difficulties, and lack of manufacturing experience
.
To this end, the company specially established a desalination project team, which is stationed at the site of the desalination project set up at Eternal Wharf to complete the task with quality and quantity
.
The equipment began to be manufactured in March 2018, and in just 5 months, the manufacturing of 3 sets of desalination units was finally completed and shipped smoothly in August
.
? China’s "13th Five-Year Plan" outline clearly stated that it is necessary to promote the large-scale application of seawater desalination, encourage high water-consuming enterprises in coastal petrochemical and chemical industries to use industrial waste heat and heat to build seawater desalination facilities, and to build seawater desalination facilities in coastal water-scarce industrial parks.
Concentrate on the construction of seawater desalination equipment of appropriate scale, and promote the application of seawater desalination technology
.