Chemical Plant Pylon Steel Chimney
1. Selection of materials. The steel chimney tower and cylinder wall are mainly made of low carbon steel. It is economical to use low-alloy high-strength steel structures for strength-controlled rods. When the structure or structural rods are controlled by stability, deformation or slenderness ratio, it is not economical to use low-alloy high-strength steel structures
In the larger tower structure, using low alloy high strength structural steel than Q235 can save 20% ~ 30% steel. In addition, the corrosion resistance of low-alloy high-strength structural steel is better than that of Q235, which can be used for open-air structure to extend the service life of structure and reduce maintenance costs.
2. Selection of tower structure form. The steel tower can be designed into triangles, quadrilateral, hexagonal, octagon, etc., according to the number of exhaust pipe. From the elevation form, there are equal slope conical tower, variable slope parabola or folding tower
(1) The flat section form of the tower. The flat section form of the tower is related to the economic effect and the aesthetic appearance. The more sides of the tower, the more steel it consumes, and the least amount of steel consumption is triangle tower.
The main reasons are as follows:
1) The load on the tower is mainly wind load. Under wind load, the force of the tower is similar to that of the cantilever beam. Therefore, in a polygonal tower, the closer the column is to the center of the horizontal section of the tower body, the less the function of the material can be played.
2) Although the increase of the number of rods can reduce the section size of rods, the increase of the number of rods requires the increase of some connecting materials and windscreen area. So the more the number of sides of the tower, the greater the load.
3) The more sides of the tower, the more diaphragm material is used to maintain the geometric stability of the plane, and the triangular tower does not need diaphragm material.
4) The more sides of the tower, the more nodes are connected, and the more materials are used for node plates.
From the perspective of structural safety, the tower with more side number has greater safety than the tower with fewer side number.
The facade form of the tower and the system of the belly bar. The steel tower can adopt single slope or multi slope form along the height. Tower bottom width and height ratio, should not be less than 1/8, often take the chassis width of the whole tower height 1/4 ~ 1/8. The bottom width of the tower has no significant influence on the steel content of the tower itself, but it has great influence on the horizontal displacement of the tower under wind load, the natural vibration period of the tower and the force of the tower foundation. At the same time, the elevation form of the tower, the system of the belly bar and the structural form of each part have a direct influence on the above results.
The connection form at the variable section of the tower. The change in section here is where the section changes, not where the slope of the tower column changes. There are three forms of sudden change of tower plane section. The first is sudden change of plane size, the second is sudden change of plane section geometry, and the third is sudden change of plane section size and shape simultaneously. No matter what kind of cross section changes, the connection forms can be divided into two types: insertion type and continuation type.
1. For the chimney of full radiation furnace type, the thickness of the heat insulation layer should not be less than 75mm. When the flue gas temperature is higher than the higher heating temperature specified in Table 4.3.1 of this specification, the heat insulation layer should be set.
2. The heat insulation layer should be firmly connected with the chimney wall, for the chimney without heat insulation layer, at the bottom of the 2m height range, when the block material or do not shape the site pouring material, can be used to anchor nails or metal mesh fixed.
3. The top of the chimney can be set up with steel plate ring to protect the edge of heat insulation layer. When the flue gas temperature is lower than 560℃, it can be made of general carbon steel, and the thickness of steel plate ring is not less than 6mm.
4. In order to support the weight of heat insulation layer, can be in stainless steel chimney inner surface, the chimney should take external heat insulation measures or set up guardrail, to prevent hot accident, along the chimney height direction.
Boiler room 40 meters steel chimney new special operations, domestic, Jiangsu Yancheng Sanli Port high altitude, facing the world, regardless of region, the national construction of the national towering qualification enterprise! 24 hours service hotline: Manager Lu
The steel chimney of the boiler room is newly built, the temperature is about 100°, the height is 40 meters, the total weight is about 20 tons, the whole can be divided into four control; Two sections of installation, section steel plate thickness is 12㎜, the diameter of the lower mouth is 2 meters, the diameter of the upper mouth is 1.8 meters, the height of 10 meters, about 6.5 tons; The thickness of the second steel plate is 12㎜, the diameter of the lower mouth 1.8 meters, the diameter of the upper mouth 1.6 meters; Height of 10 meters, about 5.5 tons, the thickness of the third section of steel plate is 10㎜, the diameter of the bottom 1.6 meters, the diameter of the top 1.4 meters, the height of 10 meters, about 5 tons, the fourth section of steel plate thickness is 8㎜, the diameter of the bottom 1.4 meters, the diameter of the top 1.2 meters, the height of 10 meters, about 3 tons, the use of all welded connection, the foundation for reinforced concrete casting on the platform.
Hebei Pude Yuelan Environmental Protection Equipment Co., Ltd. is an enterprise engaged in the development and production of industrial chemical plant pylon steel chimney, 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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