Free-standing Multi-pipe Chimney
In the Free-standing Multi-pipe Chimney, the supporting diameter of the bottom of the chimney is only considered to meet the requirement of the chimney self-supporting, and the internal space is small. At present, Free-standing Multi-pipe Chimney is often used in flue gas desulfurization unit. The absorption tower of flue gas desulfurization device is tall, not only covers an area of more, but also the outlet flue is often turned down from the high outlet to the lower elevation of the chimney entrance, the process is tortuous and the resistance is larger. Therefore, there is an urgent need in this field for a self-supporting multi-tube cluster steel chimney which can reduce the land area, effectively save materials, save energy, save land and save investment, and a combination device which includes the Free-standing Multi-pipe Chimney and the organic integrated arrangement of flue gas desulfurization device.
The Free-standing Multi-pipe Chimney comprises a multi-pipe steel chimney arranged on the bottom surface. The multi-pipe steel chimney at least comprises a first pipe steel chimney, a second pipe steel chimney, and a third pipe steel chimney; The first tubular steel smoker, the second tubular steel smoker, and the third tubular steel smoker adopt a streamlined structure, and the Angle between the tangential direction of the end of the streamlined structure and the horizontal line is 70. 85°; And a connecting member is arranged between the first tubular steel chimney, the second tubular steel chimney, and the third tubular steel chimney, so that each steel chimney forms the Free-standing Multi-pipe Chimney.
In a large thermal power plant, a ventilation structure composed of several independent chimneys. Also known as cluster chimney. Early thermal power plants had one (or two) boilers with a single chimney. In the early 1960s, the United Kingdom and the United States began to assemble several independent chimneys together to build a multi-pipe chimney containing several chimneys (among which there are more cases containing four independent chimneys, called four-pipe chimneys). After several chimneys are concentrated together, the heat contained in the flue gas from the chimney increases, the thermal buoyancy of the flue gas increases greatly, the height of the flue gas rises correspondingly, which can improve the effective height of the chimney, enhance the effect of the flue gas diffusion, reduce the air pollution near the ground, and convenient construction, so it is more and more widely used in large thermal power plants. By the late 1980s, the largest multipipe chimney in the world was that of Britain's Drax power plant, which was more than 258 metres high.
The multi-pipe chimney is mainly composed of smoke pipe, concrete shell (or tower support) and foundation.
(1) Smoke pipe: can be welded with steel plate, can also be cast with reinforced concrete. The smoke pipe with reinforced concrete casting has subsection type and self - standing type. The segmented type is that each smoker is divided into sections supported by floors attached to the concrete shell. The self-supporting type is that each smoke pipe bears its own load. There is a floor every 40 meters between the smoke pipe and the concrete shell, which is used as a channel for maintenance of aviation alarm lights. The chimney can also be constructed in sections of special firebrick, each about 10 meters long, which is supported on the beam between the cow's legs on the concrete shell and the chimney.
(2) Concrete shell: also known as windshield. It is mainly used to withstand static deflection under wind pressure and dynamic action of eddy currents on the leeward side. When a segmented chimney is used, it can also bear the load of the chimney. The concrete enclosure is generally about 10 meters lower than the smoke pipe and is equipped with a certain number of aviation alarm lights and ventilation Windows.
(3) Foundation: caisson concrete foundation is generally adopted, and a good foundation is required to withstand tens of thousands of tons of upper load. In addition, the inner wall or outer wall of all kinds of smoke pipes need to be laid with different insulation, anti-corrosion materials or anti-corrosion firebrick. The central part of the multi - pipe chimney is generally set up elevator room. All kinds of chimneys need to be equipped with lightning protection devices. A lightning arrester is arranged on the top of the smoke pipe and concrete shell of the multi-pipe chimney, and connected to the crown iron hoops arranged at different rod heights. At the same time, metal conductors are connected to each iron hoops, and then connected to the buried grounding device, forming a lightning protection grounding system. For the multitubular steel chimneys supported by the tower frame, they need only be connected to the earth system.
There are three main structural forms of multi-pipe chimneys:
(1) Inside are several concrete or brick smoke pipes with a concrete shell. Countries such as the UK and China use it more.
(2) The steel structure such as the iron tower is used to support several steel smoke pipes together. Japan, Germany use more.
(3) Inside are several steel smoke pipes, with a concrete shell. The Soviet Union, the United States and other countries use more.
Hebei Pude Yuelan Environmental Protection Equipment Co., Ltd. is an enterprise engaged in the development and production of industrial chimneys, the company focuses on the development and production of industrial chimneys.
Headquartered in Jingxian Development Zone, Hebei Province, the company has a registered capital of 60 million yuan, covers an area of 9.60000 square meters, of which the building area is 2600 square meters. The main products include self-supporting smoke, sleeve smoke, tower chimney, east smoke, cable smoke, stainless steel chimney, glass steel chimney, mobile compressed garbage bin, horizontal compressed garbage station, hook arm transfer truck, butt type garbage truck and dozens of products. The company has 128 employees, including 8 experts and engineers with master's degree or above, 60% of the employees with bachelor's degree or junior college degree, all kinds of technical personnel 26 people, 60 people special personnel, the company has a number of domestic offices and after-sales service institutions, can provide technical support and product services at any time.
The company's production equipment advanced, strong technical force. Has more than 50 sets of domestic advanced production equipment, including foreign, domestic CNC production lines 6; Hot-dip galvanizing adopts the galvanizing technology and process of Gimeco Company in Italy, and its technical level and production capacity are at the advanced level in China.
After years of development in chimney and municipal waste treatment equipment industry, the company has become a well-known brand in the industry. Through the cooperation with domestic and international design institutes, colleges and enterprises to continuously improve the enterprise's scientific research and development ability. And has cooperated with many universities and reached strategic cooperation with petrochina, Sinopec, Huadian, Huaneng and other enterprises.
In recent years, in order to solve the problem of large-caliber smoke, the company has established a technical cooperation relationship with Beijing Jiaotong University, and invested a lot of manpower and material resources to develop the "precast factory, on-site construction" steel corrugated chimney and urban waste environmental treatment products. At present, the pipe diameter range of the company's products is 0.5m-20m, and the annual production capacity is 660,000 meters.
The company always adhere to the "quality, user" of the enterprise purpose, do not ask for the number of projects, just do the project to make good quality principle, products have been promoted in the project use. Today, the company's products still maintain zero defects, zero complaints, zero accidents, by the owners, construction units of the consistent praise, and establish a long-term cooperative relationship.
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