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Feasibility analysis of double-sided color steel composite duct used in natatorium and purification plantWe all know that the swimming pool is a special place, and the air humidity is relatively high. In this way, in addition to considering the other performance of the air duct, the most important thing is to consider the anti-corrosion and rust of the air ductThe ability of corrosion and the water absorption of thermal insulation materials.The following is a brief analysis of several existing ventilation ducts:Type 1: glass fiber composite air duct type 2: aluminum foil polyurethane and phenolic air duct type 3: galvanized sheet plus secondary rubber plastic insulation air duct type 4: double color steel sheet composite air ductFirst of all: the first kind of glass fiber composite air duct has a history of more than ten years in the market. The earliest manufacturer of glass fiber duct in China: kangdaxing fiberglass duct Co., Ltd., has been producing the duct for 17 yearsOne of the important reasons is that the air duct has obvious disadvantages: the outer wall of the air duct is easy to be damaged, and the finished product is difficult to protect. It is only suitable for medium and low pressure systems, and glass fiber cotton board is easy to absorb waterAs the outer wall is easy to be damaged, glass fiber cotton is easy to be exposed, causing harm to human body. Therefore, we can see that the air duct is not suitable for swimming pools and purification places, but we do not exclude other advantages of the air ductPerformance: noise elimination and noise reduction is the inherent advantages of the air duct, beautiful appearance, light weight, convenient production and installation, which makes it play its due role in the market and some specific occasions.Secondly: the second aluminum foil polyurethane and phenolic composite air duct is a new type of air duct material developed in recent years, with obvious advantages: the lightest weight, convenient production and installation, beautiful appearance, high-efficiency insulation, etccharacteristic. The disadvantages are: the rigidity is weak, the strength is poor, the protection of the finished product is difficult, the reinforcement is cumbersome, and it is not suitable for the high-voltage system. However, due to the high humidity of the air in the natatorium, the diameter of the air duct is relatively large and the wind pressure ratio is relatively largeMoreover, the insulation material is easy to dissolve water, which is not suitable for the site; the air duct of this material can also be used for the purification air conditioning of low and medium pressure systems, but the frequency of use is relatively good, and the general purification chemical industryThe wind pressure of Cheng is higher than that of ordinary air conditioning systemNow we come to the mainstream product which is used most in the market, galvanized steel secondary insulation air duct. His performance is well known to all. If used in the swimming pool, its disadvantages are obvious. Galvanized sheet, corrosion resistantIt is easy to rust and oxidize. The secondary insulation rubber and plastic has a high water absorption rate. With a long time, the heat preservation material is the brightest and increases. At the same time, the surface of the air duct is corroded. As a result, the insulation of the air duct is easy to fall off and the galvanized sheet is rusted and oxidizedAnd rust wear, seriously affect the service life of the air duct, so the air duct in the swimming pool is not suitable.Finally, my opinion is that the double-sided color steel composite air duct is more suitable for swimming pool and purification engineering, but it does not mean that this kind of air duct is good, and other air ducts are excluded. Different places, different building selectionDifferent types of duct materials. From the following introduction, it is not difficult to see whether the air duct is suitable for these two places:(1) Due to the mechanization and mould production of pipes and flanges, the perpendicularity and parallelism of pipe sections and flanges can be guaranteed. The consistency and interchangeability of pipes and flanges of the same size are goodThe internal stress of the whole pipeline network will be less after installation, so as to improve the air tightness of the whole pipeline system and reduce the failure rate caused by the internal stress in the use process;(2) The surface strength of the pipeline is similar to that of the galvanized iron sheet pipe, which is of course incomparable to that of the glass fiber composite board pipeline;(3) Due to the use of double-sided color steel plate (surface spraying treatment) composite plate, in addition to good strength, its acid resistance, alkali resistance, rust resistance and other aspects are better than galvanized steel pipe;(4) The rigidity of the double-sided color plate composite plate is much better than that of the galvanized sheet, so the phenomenon of "more meat and less meat" will not appear in the process of blanking (mechanization) and molding, thus eliminating the vibration caused by thisAnd noise;(5) Because the whole plate bending is adopted in the forming process of this kind of pipe, the only joint is bonded and the inner and outer corners are riveted, so the biting process is cancelled, so the air tightness is quite good, especially in high-pressure operationThe performance should be better than the steel pipe (glass fiber pipe can not be used under high pressure);(6) This kind of pipeline is one-time molding of pipeline and thermal insulation, which not only eliminates the tedious of artificial thermal insulation, but also its thermal insulation quality and effect are incomparable with artificial re insulation, and there will be no insulation problemsIt is worth mentioning that the cancellation of this kind of pipeline insulation process can greatly reduce the labor cost and construction cost;(7) Due to the use of PVC closed flange and the appearance of valve with double color plate as valve body, the problem of "cold bridge" in the pipeline will be completely solved;(8) The connection of PVC closed flange is of card connection, which brings great convenience and speed to the connection of pipeline in site construction. This connection also greatly saves the installation space, and other pipelines do notFor possible installation space, such as when the top surface of the pipe is 10 cm away from the top of the house, the flange can also be connected smoothly (in this case, the insulation of steel pipe is more difficult to start);1.1 energy saving performance of double-sided color plate composite air duct(1) Good air tightness. The air leakage rate should be reduced by 70% - 80% compared with the national standard;(2) Good thermal insulation. No air supply surface
Feasibility analysis of double-sided color steel composite duct used in natatorium and purification plantWe all know that the swimming pool is a special place, and the air humidity is relatively high. In this way, in addition to considering the other performance of the air duct, the most important thing is to consider the anti-corrosion and rust of the air ductThe ability of corrosion and the water absorption of thermal insulation materials.The following is a brief analysis of several existing ventilation ducts:Type 1: glass fiber composite air duct type 2: aluminum foil polyurethane and phenolic air duct type 3: galvanized sheet plus secondary rubber plastic insulation air duct type 4: double color steel sheet composite air ductFirst of all: the first kind of glass fiber composite air duct has a history of more than ten years in the market. The earliest manufacturer of glass fiber duct in China: kangdaxing fiberglass duct Co., Ltd., has been producing the duct for 17 yearsOne of the important reasons is that the air duct has obvious disadvantages: the outer wall of the air duct is easy to be damaged, and the finished product is difficult to protect. It is only suitable for medium and low pressure systems, and glass fiber cotton board is easy to absorb waterAs the outer wall is easy to be damaged, glass fiber cotton is easy to be exposed, causing harm to human body. Therefore, we can see that the air duct is not suitable for swimming pools and purification places, but we do not exclude other advantages of the air ductPerformance: noise elimination and noise reduction is the inherent advantages of the air duct, beautiful appearance, light weight, convenient production and installation, which makes it play its due role in the market and some specific occasions.Secondly: the second aluminum foil polyurethane and phenolic composite air duct is a new type of air duct material developed in recent years, with obvious advantages: the lightest weight, convenient production and installation, beautiful appearance, high-efficiency insulation, etccharacteristic. The disadvantages are: the rigidity is weak, the strength is poor, the protection of the finished product is difficult, the reinforcement is cumbersome, and it is not suitable for the high-voltage system. However, due to the high humidity of the air in the natatorium, the diameter of the air duct is relatively large and the wind pressure ratio is relatively largeMoreover, the insulation material is easy to dissolve water, which is not suitable for the site; the air duct of this material can also be used for the purification air conditioning of low and medium pressure systems, but the frequency of use is relatively good, and the general purification chemical industryThe wind pressure of Cheng is higher than that of ordinary air conditioning systemNow we come to the mainstream product which is used most in the market, galvanized steel secondary insulation air duct. His performance is well known to all. If used in the swimming pool, its disadvantages are obvious. Galvanized sheet, corrosion resistantIt is easy to rust and oxidize. The secondary insulation rubber and plastic has a high water absorption rate. With a long time, the heat preservation material is the brightest and increases. At the same time, the surface of the air duct is corroded. As a result, the insulation of the air duct is easy to fall off and the galvanized sheet is rusted and oxidizedAnd rust wear, seriously affect the service life of the air duct, so the air duct in the swimming pool is not suitable.Finally, my opinion is that the double-sided color steel composite air duct is more suitable for swimming pool and purification engineering, but it does not mean that this kind of air duct is good, and other air ducts are excluded. Different places, different building selectionDifferent types of duct materials. From the following introduction, it is not difficult to see whether the air duct is suitable for these two places:(1) Due to the mechanization and mould production of pipes and flanges, the perpendicularity and parallelism of pipe sections and flanges can be guaranteed. The consistency and interchangeability of pipes and flanges of the same size are goodThe internal stress of the whole pipeline network will be less after installation, so as to improve the air tightness of the whole pipeline system and reduce the failure rate caused by the internal stress in the use process;(2) The surface strength of the pipeline is similar to that of the galvanized iron sheet pipe, which is of course incomparable to that of the glass fiber composite board pipeline;(3) Due to the use of double-sided color steel plate (surface spraying treatment) composite plate, in addition to good strength, its acid resistance, alkali resistance, rust resistance and other aspects are better than galvanized steel pipe;(4) The rigidity of the double-sided color plate composite plate is much better than that of the galvanized sheet, so the phenomenon of "more meat and less meat" will not appear in the process of blanking (mechanization) and molding, thus eliminating the vibration caused by thisAnd noise;(5) Because the whole plate bending is adopted in the forming process of this kind of pipe, the only joint is bonded and the inner and outer corners are riveted, so the biting process is cancelled, so the air tightness is quite good, especially in high-pressure operationThe performance should be better than the steel pipe (glass fiber pipe can not be used under high pressure);(6) This kind of pipeline is one-time molding of pipeline and thermal insulation, which not only eliminates the tedious of artificial thermal insulation, but also its thermal insulation quality and effect are incomparable with artificial re insulation, and there will be no insulation problemsIt is worth mentioning that the cancellation of this kind of pipeline insulation process can greatly reduce the labor cost and construction cost;(7) Due to the use of PVC closed flange and the appearance of valve with double color plate as valve body, the problem of "cold bridge" in the pipeline will be completely solved;(8) The connection of PVC closed flange is of card connection, which brings great convenience and speed to the connection of pipeline in site construction. This connection also greatly saves the installation space, and other pipelines do notFor possible installation space, such as when the top surface of the pipe is 10 cm away from the top of the house, the flange can also be connected smoothly (in this case, the insulation of steel pipe is more difficult to start);1.1 energy saving performance of double-sided color plate composite air duct(1) Good air tightness. The air leakage rate should be reduced by 70% - 80% compared with the national standard;(2) Good thermal insulation. No air supply surface
Under the national policy of advocating energy conservation, environmental protection and green building, polyurethane exterior wall thermal insulation material has always been a hot spot in the market. On how to interpret the relevant standards of polyurethane exterior wall thermal insulation materials, the reporter interviewed Huang Maosong, senior consultant and expert library expert of China Polyurethane Industry Association, specially invited expert of Shanghai New Materials Association and special professor of Shanghai Institute of applied technology."Gb8624-2012 classification of combustion performance of building materials and products" has been officially implemented on October 1, 2013. According to the standard, the calorific value assessment index is added, but the index is set very high. According to the standard requirements, only the calorific value of inorganic thermal insulation materials can meet this requirement, and the current technical level of organic thermal insulation materials is difficult to achieve. According to the current heat value index of thermal insulation materials. Nonflammable grade a materials are inorganic materials. According to the code for fire protection design of buildings, grade a thermal insulation materials must be used in civil and public buildings over 50m. According to this regulation, only inorganic thermal insulation materials can be used, which will have adverse effects on building energy conservation, environmental pollution and personnel health of our foreign external wall insulation system.At present, the widely used inorganic thermal insulation materials such as rock wool and glass wool have high energy consumption in the production process, great pollution in the construction process, pollution to the environment, and serious health damage to the construction personnel. And this kind of material can't have the same life as the building. In theory, it will be demolished and rebuilt after ten or twenty years, and the cost of construction and maintenance is greatly increased. In view of the above serious defects of inorganic thermal insulation materials, Professor Huang Maosong suggested that the fire code index should be relaxed from 50m to 100m, that is, class a thermal insulation materials must be used when the height is > 100m, and Class B1 thermosetting thermal insulation materials can be used if the height is less than 100m.Interpretation of GB / 2012 / t29416 exterior wall thermal insulation system test methodAfter the promulgation and implementation of GB / t29416-2012, it will provide a scientific basis for judging the real fire simulation performance of organic thermal insulation materials, and will strongly show that the fire safety of thermosetting organic thermal insulation materials is better than that of thermoplastic organic thermal insulation materials under the same B1 or B2 oxygen index conditions.In view of this, Professor Huang Maosong suggested that the new standard of code for fire protection design of buildings should clarify the actual fire performance differences and different fire protection requirements of the two materials. The new regulation of building thermal insulation materials (No. That is to say, under the same building height conditions, when thermosetting thermal insulation materials are used, fire isolation belts can not be set, but when thermoplastic thermal insulation materials are used, they must be used.
Fresh air system is popular and has great market potentialRecently, the relevant departments have issued a series of industry standards for indoor air pollution, formulated clear standards for various indicators of indoor air quality of newly-built residential buildings, and proposed to vigorously promote the fresh air system in the future housing construction, so as to let the concept of indoor air health go deep into the hearts of the people. At present, in China, the application of fresh air system is still in the initial stage, with the boost of many powerful factors inside and outside, there is a huge market potential.
Glass magnesium air ductGlass magnesium air duct is a new generation of environmental protection and energy-saving air duct, which can replace inorganic glass duct and glass fiber duct. The structure of the product is three-layer composite, i.e. two layers of high-strength inorganic materials inside and outside and a layer of thermal insulation material in the middle. The surface of glass magnesium composite air duct is smooth and smooth, and the air leakage rate is only 5% of that of general air duct, which greatly improves the air delivery efficiency. In the process of production, production, installation and use of this product, the glass magnesium composite duct does not produce harmful substances to the environment, no rust, no mildew, no dust accumulation, no dust and fiber of glass fiber duct; no odor, low thermal conductivity, excellent thermal insulation performance, good sound insulation and sound absorption performance, no noise generated by shrinkage and expansion of iron sheet air duct; non combustible and anti folding Pressure resistance, low water absorption, low temperature expansion, no moisture absorption deformation, service life up to 20 years.As a popular product, glass magnesium air duct not only meets the market demand for traditional products, but also achieves the performance upgrading of inorganic composite by improving the energy-saving, fire prevention and environmental protection index parameters of inorganic composite materials. At present, the products have passed the "national fire protection building materials quality supervision and inspection center type inspection", "national building materials test center type inspection", and obtained the "building materials combustion performance grade (gb8624a) mark".Glass magnesium air duct can be used in all kinds of HVAC ventilation pipe, smoke control duct, etc. Compared with the traditional inorganic composite duct, the glass magnesium composite duct has a significant cost-effective advantage and broad market prospects.Features of glass magnesium air duct1. The quality is stable and reliableGlass and magnesium duct products have passed the ISO9001:2000 quality management system certification, established a complete quality management organization and product quality continuous improvement program, produced products in strict accordance with the requirements of ISO9001:2000 quality management system, and set control points at each process stage for process control to ensure product quality2. Excellent fire resistanceGlass magnesium air duct is composed of non combustible inorganic materials and thermal insulation materials by high-tech technology. It is A-class non combustible building material (composite material overall grade A) according to the national fire protection building material quality supervision and inspection center.The special glue and accessories of glass magnesium air duct are class a non combustible materials.3. Ultra high strength performanceThe glass magnesium air duct has high strength, the bending strength is greater than 1.8 MPa, and can withstand the wind pressure of 2500 PA, which can meet the use of high, medium and low pressure air systems.4. Excellent moisture and water resistanceGlass magnesium air duct is not afraid of water, and does not rust or corrode in wet environment. Even if immersed in water, it can still maintain high strength, and the wet strength is higher than 97%5. Can effectively improve the ceiling net spaceGlass magnesium air duct adopts non flange connection technology, which can improve the ceiling net space without flange height.6. Light weight, reduce building loadThe weight per square meter of glass magnesium air duct is 7.5kg, which is 25% lighter than that of iron sheet air duct, which can effectively reduce the building load.7. Beautiful appearanceGlass magnesium air duct is connected by non blue, with flat bottom and beautiful overall. The weight of glass magnesium composite air duct is 7.5kg per square meter, which is 25% lighter than that of iron sheet air duct, which can effectively reduce the building load.8. Improve indoor air qualityGlass magnesium air duct is not rusty, moldy, dust-free, does not breed bacteria, fungi, dust and fiber, no odor, does not produce granular, gaseous pollutants and biological aerogel, can improve indoor air quality. It has passed the inspection of authoritative department.9. Class of environmental protection products, harmless to human beingsAs a new type of green and environmental protection building materials, according to the idea of product production cycle assessment (LAC), our factory has taken effective environmental protection measures from the aspects of raw materials, process formula, energy consumption and emission in the production process, product recovery and so on. No matter in the process of production, manufacture, installation or use, the air duct does not produce substances that pollute the environment. Even in the case of fire, the smoke produced by the duct does not contain toxic substances and is harmless to human body. Therefore, the glass magnesium air duct is a kind of environmental protection wind pipe, which has obtained the national environmental protection mark.10. Long life, saving long-term investmentGlass magnesium duct product design structure is reasonable, reliable performance, stable quality, service life more than 20 yearsGlass fiber air duct is a new type of air duct developed for the application of new technology and new materials. It is based on superfine fiberboard and compounded by special processing. It has the advantages of light weight, small air leakage, fast production and installation, small space occupation, good ventilation and reasonable performance and price. In particular, its excellent heat preservation and noise elimination performance is preferred by the majority of users. Compared with the traditional process air duct, it can save about 20% of the pipeline system investment for users. Glass fiber duct composite glass wool board is cut, bonded, sealed and reinforced by sealing tape. The double protective layer of the composite glass wool board is glass fiber cloth, and the composite aluminum foil or the inner protective layer is glass wool board. Glass wool board is formed by centrifugation of glass fiber and resin glue, which is hot pressed and solidified. Normal specification of the board: density 70 ~ 75kg / m2, thickness 25mm. Because the composite glass wool board sandwich is porous light material, low heat seeking coefficient and large sound absorption coefficient, the glass fiber composite air duct has good heat preservation and sound attenuation performance; at the same time, the air duct has the characteristics of light material, construction cycle, fire prevention, moisture-proof, no harmful volatiles, beautiful appearance, long service life and low cost. Compared with galvanized steel duct and composite glass fiber duct with insulation, the project cost can be saved by more than 30%, not including the saved field elimination
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