The development of China's chemical industry is of a phased nature. Nanhua, Jilin and Lanhua during the "1st-5th" and "2nd-5th" periods, and the formation of 13 large chemical fertilizers during the "6th-5th" and "7th-5th" period in Nanjing Qixia and Shandong Qilu, Beijing Yanshan, Sichuan Tianhua and Yuntianhua, and later “Yangyuejin†in the late 1970s formed chemical bases such as Shanghai Jinshan and Ningbo Zhenhai, which basically constituted the basic pattern of China's chemical industry. Through the basic understanding of the industrial layout, it should be acknowledged that since the founding of the PRC to the early days of reform and opening up, China has established a long-term plan for a more complete chemical layout in the chemical industry. However, due to the constraints of historical conditions at that time, such as proximity to water sources or nearby raw material production areas, of course, there are war consciousness and other factors, causing the frequent occurrence of hidden accidents have been buried. From this, we can vaguely see the correlation between major accidents and industrial patterns.
Since 1980, with the rapid development of China's economy, on the one hand, the petrochemical industry has become the most powerful driving force for rapid economic growth in all regions; on the other hand, the explosive demand for chemical raw materials in industrial growth has made all regions at all costs. Develop chemical and related industries. In the more economically developed Yangtze River Delta and the Pearl River Delta, “villages and villages ignite, and households smokeâ€, and various types of chemical plants are blooming all over the place. All this will pave the way for the occurrence of major accidents in the future.
In late 1990, with the acceleration of China's urbanization process, especially after the real estate market opened in 1997, the original chemical companies gradually changed from suburbs or suburban areas into suburban areas and even became urban prosperous roads. After 2003, the car entered the family and various types of gas stations entered the city. Chemical plants and residential areas live in close proximity to each other. Gas stations and office buildings have become a strange phenomenon across the wall. They completely break the basic requirements for separation of production, storage, and living areas by traditional chemical companies. Urban residents live with dangerous goods daily. They have not been told what kind of dangers exist around them and there is no possibility of risk aversion.
In fact, the regulations for the chemical industry in the 1960s and 1970s were very strict. For example, there were strict regulations on the distance from residential areas and water sources. However, regulations for the chemical industry are now largely loosened. The regulations concerning the planning and construction of chemical companies lack national legislation, and the implementation of local regulations at the implementation level is worrying. Why did the chemical plant in Nanjing go into residential areas? Why is the chemical plant in Jilin located close to the water source? Therefore, during the transition period in China, it is urgent to re-consider the issue of improving the specific legislation in the chemical industry.
First, strict restrictions must be placed on the spatial layout of the chemical industry. Previously, this work was mainly carried out by the Ministry of Chemical Industry. Therefore, experts suggested that the management function of the Ministry of Chemical Industry in the site selection can be transferred to the NDRC. Judging from existing experience, the layout of specialized industrial parks along the coast is the first choice, and the NDRC must assume corresponding responsibilities. In reality, on the contrary, the speed of industrial transformation and upgrading in the eastern region is accelerating, and a large number of chemical companies are facing closure, suspension, merger and transfer. Under the background of western development, a large number of coastal chemical products are difficult to survive in the inland and western regions. Transfer. If we relax the restrictions on industrial transfer in this transition, it may be that after several years, catastrophes such as Nanjing will reappear in inland cities.
Second, to strengthen the professional quality education for chemical workers, which is the basis for reducing major accidents in the chemical industry. Each rule is written in blood. Every accident verifies that this is an iron law. In today's rapid development of China, companies blindly pursue profits and safety procedures have been repeatedly broken. Reaffirming the qualifications of employees in special industries from the national level and raising the barriers to entry are the respect for the lives of employees and the people.
Again, strengthening the disclosure of information of existing chemical companies is the basic requirement for improving the sense of social responsibility of chemical companies. The government has the responsibility and obligation to require the basic information of special industries such as chemicals and pharmaceuticals to be disclosed in the designated media, including the basic state of the product, the possible risks, and the corresponding protective measures. The real problem is that a large number of hidden dangers are not enterprises but the surrounding residents have discovered or even reported the relevant departments. The accident still occurs.
Lastly, the legislation is to popularize education for special products, especially chemical and pharmaceutical industries and products, which is the most direct means of reducing the real risks of the chemical industry. As the economy continues to develop and dangerous goods enter homes and society at different levels, people must have a high level of awareness of the dangers of these products.
Focus on economic interests while ignoring security protection and site selection planning. This is a symptom of a major industrial development, just like Japan's Minamata disease that occurred during the industrialization period.
However, each accident was accompanied by great destruction and grief that was difficult to bridge, but it also urged the chemical industry to constantly adjust the development model and improve the legal system. What can not be repeated? The accident cannot be repeated.
Metal Body Square Water Cooling Tower
This series of products run stable, low noise, energy-saving, in office buildings, shopping malls, hotels, residential areas and other central air-conditioning supporting the use of better results.
The company's standard cooling tower according to the international design conditions design, can also provide customers with non-standard operating conditions or specific sizes under the special, special design.
The circulating water pump suction port shall be located below the water level of the cooling tower catchment basin, and the cooling tower outlet pipe shall not be allowed to be higher than the maximum water level of the catchment basin.
Pipe mounts should be pipe racks and cooling towers should not be allowed to directly bear the weight of the pipes.
The rehydration pipe of the cooling tower should be provided with a support stand to avoid vibration of the pipe when the float valve is rehydrated.
Rehydration pressure should be below 5m water pressure, national standard
The flannage pressure is 1.0Mpa.
When two or more units are assembled, our company will provide a connecting balance tube to balance the chassis water level. The tower top inlet should be set with a conditioning valve in order to enter each
.The water level of the tower is uniform.
The noise is measured at dm1.13VL-W at the equivalent diameter of the cooling tower (Dm1.13VL*W), 1.5 meters above the ground height, wherein L and W are the shape rulers of the tower
inch long and wide).
The use of cellular continuous blister series of diversion,heat dissipation, water collection three-in-one native filler, the whole suspension, gravity cloth water, low drop of water, with cold effect
High, low energy consumption, less drift water, less noise and so on, floating water rate is less than 0.001%.
When connecting different types of towers, the bottom basin water level height of different types of towers must be taken into account, and the base height must be adjusted to maintain the water level balance of the towers.
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Wuxi Ark Fluid Science Technology Co., Ltd. , https://www.fangzhouarkfluid.com