Introduction of glass fiber reinforced plastic chimney
The inner cylinder wall of the glass fiber reinforced plastic chimney is made of inner lining layer (inner layer + impermeable layer), strength layer (structural layer) and outer protective layer (outer surface layer). Glass steel chimney lining layer made of carbon fiber or glass fiber mat layer + jet short fiber layer. Structure layer in accordance with the design of the linear will be impregnated with resin fibers, such as uniform thickness of the inner lining of the outer surface, and the lining of the solidified into the overall structure. Finally, the outer protective layer is coated on the surface of the cylinder. Because the installation is convenient, the cylinder is usually manufactured by sections.
FRP chimney is the main way to exhaust emissions from coal-fired power, metallurgy and other industries. In thermal power industry, for example, in the past, only the thermal power industry to take dust measures, that is, through the high chimney exhaust emissions into the atmosphere around. Today, due to environmental protection and strict control of sulfur dioxide emissions requirements, the need for desulfurization treatment of waste gas, the current thermal power industry are mostly used in wet desulfurization. In the wet desulfurization process of flue gas, while containing more sulfur dioxide, but high temperature flue gas enters the chimney, up to 130~160 DEG C, only a small amount of the formation of the phenomenon of flue gas condensation, the chimney corrosion is not very high. However, after wet desulfurization, flue gas temperature is reduced to 50~80, the moisture content of the flue gas is high, and the concentration rate of the inner wall of the chimney is also increased. Although the temperature of flue gas wet desulfurization to 50-80 DEG C, but in the design of chimney flue gas temperature will often consider an emergency state without wet desulfurization (about 150 DEG C) and temperature (accident nearly 200 DEG C), so the requirements of corrosion resistance and temperature resistance have high wet desulphurization chimney. Jiangsu glass fiber reinforced plastic chimney factory
In order to solve the problem of serious corrosion of the inner wall of the chimney after the installation of wet desulfurization equipment, the technical personnel at home and abroad have conducted a lot of research and engineering test work. Currently used anticorrosion materials is acid resistant brick and acid resistant cement and steel titanium composite structure, steel and stainless steel composite field, steel coating materials and hard alloy liner e-276. The new type of glass fiber reinforced plastic chimney has the advantages of corrosion resistance, low investment, short construction period, light weight, long service life and so on.
Advantages of glass fiber reinforced plastic chimney
1, glass steel chimney
(1) excellent corrosion resistance, the flue gas contains a considerable number of HCL, H2SO4, and other strong corrosion resistance of the chemical substances are very good
(2) the overall structure, the weakness of the thin
(3) high cost performance, low life cost
(4) for a long time without maintenance, high temperature resistance
(5) product design is strong, can be customized according to customer demand for products
2, titanium (nickel) alloy composite steel plate lining
Excellent corrosion resistance, weld area is easy to produce corrosion, high price.
3, steel tube
(1) the corrosion resistance of foam glass brick is strong, the construction technology is complex and the duration is long.
(2) spraying anticorrosion concrete: the construction condition is poor, the construction technology is complex.
(3) spraying high performance heat resistant acid resistant coating: the service life is short, the maintenance is complex
(4), glazed masonry acid brick chimney manufacturing period is longer
Glass fiber reinforced plastic chimney structure
1, concrete inner sleeve glass steel chimney form
Inner cylinder for concrete chimney, which is mainly used for discharging flue gas height of 100m-200m. In this structure, make full use of the glass steel of high temperature resistance, corrosion resistance, concrete chimney support, there is a set of 1 glass concrete chimney internal steel tube, but also some 2 or 3 glass steel tube, depending on the design requirements and the owners.
Concrete set of glass steel tube general structure using piecewise hanging wall. In the concrete chimney, the buried steel structure is a support system. General 30-50 meters for a paragraph, with expansion joints between each connection, each 15 meters to design a guide support.
The first step: pipe plate handlebar first chimney tube is transported to the bottom of the chimney
The second step: the first section of the chimney and lifting sling bobbin connection; riser section of the bottom connection to the height of the platform.
The third step: using a flat car into the second section of the chimney, and adjust the position, so that it is aligned with the first paragraph.
The fourth step: the completion of the second paragraph and the first paragraph of the production. Remove the first sling section, with second sections of the hoisting ring lifting the first section and the second section
The fifth step: to connect the first and two sections connected to the position of the platform.
The sixth step: the new pipe section is connected to the above pipe section. Repeat the third step to the fifth step operation.
The seventh step: through the lifting device to adjust the upper and lower position of the inner tube, the supporting pipe section and the supporting steel platform are matched and fixed.
2, jacket steel structure glass steel chimney form
Jacket steel structure glass steel chimney general design height of 100 meters below, the general design and desulfurization tower together. The chimney is placed directly on the outlet of the desulfurization tower. The design of this chimney need not be segmented, chimney weight can be directly to the desulfurization tower, can also design the chimney weight to the steel frame. If the weight of the chimney is borne by the steel frame, the chimney is to be segmented. Each section can be connected with an expansion joint.
Approximate installation steps and installation process photos
(1) prefabricated steel chimney and steel bracket
(2) sectional hoisting and fixing of carbon steel support
(3) the sectional hoisting and fixing of the glass steel chimney
Application of glass fiber reinforced plastic chimney
After reasonable design, manufacture and installation of glass fiber reinforced plastic, the structure and the whole set of wet FGD system are used.