Bulk storage

The storage and transportation facilities of the steam and electricity co-generation unit of Gulei petrochemical integration project have two coal storages with a diameter of 100 meters and coal transport systems. In order to ensure coal storage on schedule and open up the transportation process from coal bunker to steam and power co-production main device, the company organized construction forces to fully launch the steel dome space frame connection installation of its 1# coal storage, and the installation of coal transport system in the plant was also intensified.

The co-generation unit of Gulei Petrochemical Integration project is the “power source” that provides steam, and electricity for the whole process unit of Gulei petrochemical integration project, the coal bunker and transportation facilities plays the role of providing fuel coal for the boiler island storage of the co-generation unit.

The steel space frame of 1# coal storage starts from 23.8 meters in elevation and finally closes at 52 meters in elevation. Since late June, in response to the daily on-site temperature reaching more than 40 degrees Celsius since the beginning of summer, the company has organized a professional installation team of the space frame, taking the wrong time to avoid the hottest time at noon, and carrying out the installation and connection of the coal storage space frame composed of 1574pcs ball heads and about 13,900pcs bars in the air.

Main technical parameters of the space frame dry coal storage:

The design service life of space frame dry coal storage is 50 years. Refer to the Code for Fire Protection Design of Thermal Power Plants and Substations (GB229). The space frame adopts the form of arch, and the grid unit adopts the normal quadrangular cone. The span of the space grid is 93m, the length is 182m, the arch height is 31.5m, the vector height is 3.3m, and the projection area is 17,072 square meters.

Technical requirements of the main components:

Space frame bar: The grid structure of the fully closed coal storage is a full steel structure, using the bolt ball connection form, and the selection of steel should meet the requirements of the relevant national norms. The steel pipe of the space frame adopted high frequency electric welded steel pipe.

Bolt ball: 45# steel material and the blank steel ball is forged.

High-strength bolts: 40Cr steel material for high-strength bolts. Bolts with diameter ≤M36 are rated 10.9S and bolts with diameter ≥M39 are rated 9.8S.

Sleeve: Q235 steel material for the sleeve when d<=30, and 45 steel for the sleeve when d>30.

Blanking plate and cone: Q235B steel material, the cone head is forged.

Roofing panel: The cladding material is Al-Zn alloy coated steel plate, type 840, 0.6mm thickness.

The large span dry coal storage project is located in Wucaiwan, Xinjiang.

The raw material shed of Anyang Iron & Steel Group consists of four parts.

They are coke freight yard A, ore yard B, mixing and flat yard C, and 13 coal yard powder field D. Among them, the span of B is 145 meters, which is currently the largest raw material shed in China. The D has a span of 113 meters, a height of 52 meters and a width of 48 meters. Although the width is the shortest of the 4, due to the narrow width an additional layer of grid structure is added to enhance the wind resistance.

The weight of the three-layer steel structure is heavy, and the steel structure components reaches more than 130 tons. It is very difficult to complete the 113-meter-span docking. In order to complete the arching work, Anyang Iron and Steel coordinated six cranes to the site. The largest one has a lifting weight of 360 tons.

The Muguajie conical space frame structure coal storage shed is located in Shuozhou, Shanxi Province. Project dimension is 102 meters diameter and 47 meters height, total weight is about 2000tons.

The main structure anti-corrosion adopts three layers of paint with total TDF 150μm. Roof cladding is 0.5mm color steel panel with PE coating. The design service life of main structure is above 50 years, the service life of roof cladding system is more than 15 years.

The fully enclosed coal storage shed can realize fully enclosed storage of coal. It completely solves the dust pollution and material loss caused by the strong wind in the previous operation. Especially under the severe environmental protection situation, it ensures the normal production and operation of the enterprise and creates greater value for the enterprise.

 

The Hassyan project is equipped with two coal storage yards. The yards are the triangular pipe truss and down-cable structure. The structure is light, beautiful and cost-efficient. The entire  yard steel structure project is strictly in accordance with international codes for structural design, material procurement, fabrication and construction acceptance. After the completion of the yard, a single coal storage yard is 677m long and 122m wide. It covers an area of up to 83,000㎡. The coal storage yard capacity of a single coal yard is 570,000 tons, which can meet at least two 600,000-kilowatt units running at full load for 45 days.

This project bulk material storage is 110m wide and 500m long. It is an arched steel space frame structure. The installation is simple and safe. The structure assembly is on ground, which is safe and has less labor intensity. Air element assembly will proceed after space frame block is assembled. In this way, timeline is shortened greatly.

The circular storage has the characteristics of occupying less land, integrating storage and flowing coal.  It is convenient for sliding form construction, can avoid environmental pollution.  Therefore, it is widely used at home and abroad, and gradually develops to large scale.

Huoerxinhe coal storage adopts reinforced concrete structure at the bottom and bolt-ball space frame structure at the top. The dimension is 90m diameter and 58.8m building height.

The dome coal storage is responsible for the storage and reaction effect of mine raw coal, ensuring normal production of mines. Mine raw coal is delivered to the coal yard by scraper conveyer and 130 tape conveyor. After stacking stacking machine for stacking operation, and then it is transported to the buffer bin by 140 belt conveyor and 117 belt conveyor,  in the end, transported to coal preparation plant for washing and processing.

Pile coal diameter φ = 90m, maximum material height h = 23.2m, reserves V = 88120m3 (230 ° C), stacking machine capacity Q = 1200t / h, the stacked capacity Q = 800T / h, the rotation angle is 360 °, the pitching angle of the stacker is from -12 ° ~ 0 °, its tap angle is from -2.5 ° ~ + 40 °. Adopt international leading hydraulic drive mode and PLC control technology.

This thermal power plant includes 2 coal storage shed. The two coal storege sheds have same dimension. The span of each one is 76 meter. The structure of coal storage is space frame which is widely use for bulk storage. 

One Belt, One Road

A strip of water separates China and Vietnam, but the friendship has grown stronger over time. With the increasingly frequent economic and trade cooperation and exchanges, the two countries have broad space for cooperation in the fields of energy and infrastructure construction. Under the “One Belt, One Road” initiative, with the cooperation of the construction unit China Energy China East China Construction Investment Anhui Power Construction Company No. 1 and No. 2 to go abroad, China Coal Science and Industry Group Shanghai Co., Ltd. participated in the construction of a 2 × 600MW coal-fired power plant in Hai Duong, Vietnam. World energy construction contributes its own strength.

The 2×600MW coal-fired power plant project in Hai Duong, Vietnam is a key project of the “Belt and Road” initiative.  China Energy Engineering Planning and Design Group and Malaysia JAKS Co., Ltd. jointly funded and constructed it. And it operates in the BOT mode. Vietnam Hai Duong Power Plant is located in Hai Duong Province, Vietnam. The scale of construction is two 600,000-kilowatt subcritical units. The total investment of the project is 1.8685 billion US dollars. It is also the largest single investment project by a Chinese company in Vietnam so far. The construction period of the project is 54 months and the concession period is 25 years. After the expiry, it will be handed over to the Vietnamese government free of charge. After the power plant is completed, in addition to meeting the local electricity demand, it will also transmit electricity to the capital Hanoi and surrounding provinces.