China's integrated ceiling rapid development trend
At the meeting, Mr. Lu Renbo affirmed the booming integrated ceiling industry and the company, and pointed out that the first China integrated ceiling industry development summit is not only for the development of national furniture, building materials and other related industries, but also for urban residents. The improvement of living conditions is of great significance for development. For the rapid rise and development of the integrated ceiling, the inevitability of Lu edge wave is one of the mysteries.
First, the rapid development of urban construction in China provides adjustments for the differentiation of industries. As we all know, the speed of urban development has accelerated. The GDP of the domestic second industry has increased by about 13.5% over the same period, exceeding the primary industry. It also reflects the growth of real estate as a developing country, especially China’s population growth. According to data released by the Statistics Bureau, as of October 2007, China’s real estate development investment has reached 210 million yuan, and the area of ​​houses has reached 33,000 square meters, an increase of 8.5% year-on-year. Not only has it given opportunities for real estate development to grow, it has given Home improvement provides a source of rapid development.
According to statistics, domestic installation projects reached 300 billion in 2007, an increase of 14% year-on-year. All these data prove that China's urban construction and the booming development of the housing construction industry have made China as a primary stage of development for socialist development. In terms of the industries in which the urban construction develops, most of the product models are distributed and passed on to demand. The analysis and the analysis of China's integrated homes on the requirements of the ceiling industry, the ceiling industry today also has its inevitability, the development of this industry is also the main means to mobilize the rise of the regional economy.
Second, from the perspective of the integrated ceiling industry, it has become inevitable that China's manufacturing has created a transformation into China. In addition to satisfying China’s needs, the amount of exports each year reaches US$1 trillion. Both the developed countries and the developing countries can see the signs of Chinese manufacturing, mainly because China exports a wide range of products and can meet a variety of requirements. Different needs, while China's manufacturing industry is facing a huge surplus, it also faces some problems. In the past year, Chinese manufacturing experienced unrest that the company has not had, and Chinese manufacturing should seek new breakthroughs. In recent years, there have been many trade frictions made by China, and they have more to talk about with China than the trade surplus. Made in Germany 40 years ago, made in Japan 30 years ago, and made in Korea 20 years ago, all experienced a qualitative leap and experienced a critical point of challenge. To overcome these challenges, this is a process in which the economy grows stronger, and it is also a series of world brand processes such as the overall economic upgrading of a country.
Feiyiya Inclined Plate Clarifiers Use Gravity & Innovative Engineering
A gravity clarifier is the most economical method of removing solids from liquids, using natural gravity as the source of energy and it is free. A clarifier simply provides a non-turbulent zone where heavier than liquid solids, suspended by turbulence, are given sufficient time to settle to a quiescent surface. The HEI inclined plate clarifiers are compact units with multiple layers of settling area utilizing less than 25% of the floor space required by conventional clarifiers.
Principle of Clarifiers
A particle carried forward by the velocity of the liquid flow must settle at a rate that allows it to reach the bottom before passing through the clarifer. Thus, particles beginning at a point [a" must traverse some route lying between ab and ab` in order to avoid being carried over the outlet.
If V is the horizontal velocity of the liquid, S the solids particle vertical settling velocity, L the length of the settling device, and D its depth, then particles entering at point A will settle to the bottom of the device only if V does not exceed: S(L/D)Since Vmax / S = L / D then, Vmax = S (L / D)
Therefore, the velocity at which a horizontal clarifying device may be operated successfully is directly proportional to its length and inversely proportional to its depth.
This analysis applies to multiple horizontal plate units also. The spacing between plates is usually a few inches as opposed to a depth of several feet in a horizontal tank; therefore, [settling-out" times are dramatically reduced. The flow must be non-turbulent to prevent settled solids from being re-entrained within the moving liquid. Small plate spacing and a large surface area permits laminar flow at higher velocities than large horizontal tanks would allow.
Horizontal clarifying devices become self-flushing if they are inclined at an angle which exceeds the angle of repose of the settled solids. In such cases, flow enters the lower end of the device where settling particles move to the floor eventually sliding back out the entrance. Clear effluent leaves the top of the device.
However, when the device is inclined, the furthest settling particles no longer fall through distance D but some longer distance D`. This new longer settling distance D` is related to D by the relation: D = D` cos Ø.
Theta [Ø" is the angle, the device is inclined to the horizontal plane. Thus settling distance is increased by the factor: 1/cos Ø In the case where Ø = 60º, 1/cos Ø = 2.
The maximum settling distance is twice the distance between the plates. It is apparent then that the lower the angle of inclination, the smaller the settling distance. However, the angle of inclination must exceed the angle of repose of the solids to be separated. The previous equation may be modified to express the cosine of an inclined plate clarifying system as:
Vmax = L / (D / cosØ) (s) = L·cosØ / D (s)
Inclined Plate Clarifiers
A reduction of the required floor space is acquired by diminishing the separation between the horizontal plates to a few inches and stacking the settling surfaces. Inclining the plates to provide self flushing, 45º for heavy particles and 60º for light particles, reduces the available horizontal projected area (effective settling area) by a factor equivalent to the cosine of the angle. The surface area diagram (below) graphically compares the floor space requirements of an HEI inclined plate clarifier with the equivalent horizontal projected settling area.
Settling Rate
The settling rate for a specific solids should be determined by standard laboratory tests. Light particles, such as metal hydroxides, usually require a design parameter of 0.25 – 0.50 gallons per minute per square foot of horizontal projected area. These low density solids require the inclined plates to be set at a 60º angle to induce the particles to slide down the plate. Heavier particles (such as sand that easily flow) will readily slide from plates set at a 45º angle.
Maximum flow rate of an inclined plate clarifier is based on the flow rate per unit of a horizontally projected surface area. Retention time in the clarifier is not a design criteria. However, attaining optimum performance requires the prudent design to recognize several additional, very important factors.
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