There are problems with China's industrial cooling towers. Please speak freely and share your opinions and understandings. How can they be improved?
Thread Content
1. The thousands of industrial cooling towers currently in operation are technologically backward. It is understood that among the 13,000 large, medium and small enterprises in my country's petrochemical industry, there are nearly 100,000 cooling towers of various types. Except for a few large petrochemical, chemical, and fertilizer enterprises that use complete sets of cooling equipment imported from abroad, the operation of cooling towers has reached the international advanced level, and the reuse rate of industrial water has reached more than 80%. Most enterprises that use domestic cooling water-saving equipment have varying degrees of technological backwardness, and the water reuse rate is far from reaching standards. Since industrial water conservation has not been taken seriously for a long time, there are still a large number of industrial cooling towers in actual operation in my country's petrochemical industry that were designed and built in the 1950s and 1960s. Due to historical limitations and long use years, most of these water-saving equipment have become old towers, diseased towers, and old towers. Their backwardness is alarming. For example, in the cooling towers of many fertilizer companies, the air duct is an original product of the concrete structure, the water distributor is a water tank with a concrete structure, and the tower core is an inlaid slat of a concrete structure. Due to its age, serious scaling and blockage have caused the cooling tower to lose its cooling capacity. The factory actually relies on once-through cooling water to maintain production. Due to low water fees, although the cooling tower has long become a "deaf ear - a decoration", the company remains calm and turns a blind eye. It is not uncommon for so-called industrial water-saving equipment with high energy consumption and low efficiency to be used indiscriminately. These towers urgently await a complete overhaul using advanced integrated engineering techniques. 2. The technical level of cooling tower design, manufacturing, construction and installation varies greatly. Currently, in my country's industrial water-saving market, there are both design practices guided by linear advanced design ideas and extremely backward design products based on so-called "standard drawings" ； There are large-scale industrial complete sets of cooling equipment that are well-run and have been domestically produced by digesting and absorbing foreign advanced technologies and innovating them. There are also behemoths that are crudely made and cannot be used as soon as they are put into production. ； There are high-quality PVC fillers that have been used continuously for thirteen years and still maintain good toughness and strength, while there are also shoddy products that are like tofu, falling off and falling apart before they are used in the tower. The most incredible thing is that some people, using the brands of XX Scientific Research Institute and XX Design Institute, have crudely manufactured a batch of so-called large-scale industrial water-saving equipment, falsely claiming that it is "another major breakthrough in circulating water engineering technology, which is in a leading position in the country and can be used for water conservation." * * Save a lot of foreign exchange, the market prospects are very broad." By some strange combination of circumstances, it actually passed the provincial and ministerial level "Scientific and Technological Achievements Appraisal", and the members of the appraisal committee are almost all senior engineers, professor-level senior engineers, researchers, and doctors. What is even more ridiculous is that in order to promote this "result" to the whole country, these people held a grand "new technology achievement" conference in a southern city, defrauding nearly a hundred senior engineering and technical personnel, experts and scholars from all over the country in the industrial water supply and drainage field who did not know the truth to participate and sign. However, just a few years after this "result" was put into actual operation, users discovered that the actual cooling capacity of this "result" was only 60% of the "released cooling capacity", which could not meet production needs at all. “Environmental protection should be a lifelong endeavor, how can it be true in the cooling water tower? ”We believe that low technical level is not terrible. As long as we work hard, there will always be improvement. However, in order to achieve personal goals, we do not hesitate to resort to subversion and fraud, which can only cause chaos in my country's industrial water supply and drainage industry, and can only make the technological progress of my country's industrial cooling towers pay a greater price. The huge contrast and sharp contrast between the above phenomena truly reflect the current status of my country's industrial cooling tower technology, as well as the unbalanced development in the primary stage of socialism and the imperfect development of the market economy. 3. In the research and development of cooling tower technology, focus on the local rather than the overall situation. Cooling tower technology is a systematic project, and its inherent laws require that the performance of wind, water, and heat exchange media should be well matched and take care of each other. If the performance of these three is not in place and there are major flaws in the mutual take care of each other, it is impossible to achieve high efficiency of the cooling tower. Many enterprises or units in our country focus on the research on cooling towers, especially the continuous renovation of filling patterns, but they pay little attention to the overall technological progress of cooling towers. This research method that only focuses on the local and not the overall situation is one of the main reasons for the slow overall technological progress of our country's cooling towers. Developed abroad * * Research on cooling towers mostly focuses on the overall situation and the interrelationship between the three elements (It is imperative that manufacturers and owers understand the relationship between each tower component and the necessity to evaluate the impact any new component has on the performance of the system as a whole). This major difference proves that the overall perspective is more scientific, both in theory and in practice. 4. The scientific research, design and manufacturing of cooling towers are disconnected from each other. developed * * The scientific research, design, and manufacturing of cooling towers are unified within a professional company, which is extremely beneficial to promoting the development of the overall cooling tower technology. Many professional companies have a history of decades or even centuries. For a long time in my country, the scientific research, design, and manufacturing of cooling towers have been separated and independent. Taking the design of cooling towers as an example, most are done by specialized design units rather than by cooling tower manufacturers. That is to say, design and manufacturing are separated. This institutional flaw has resulted in a "mission" perspective. It is difficult to tell whether problems that arise after it is built are caused by design or manufacturing. It is difficult to feed back real design flaws to the designer and obtain timely and accurate modifications in the new version of the design drawings. This disjointed system is obviously detrimental to the progress of cooling tower technology. The same is true for scientific research work on cooling towers. Units with research capabilities do not build towers, and units that build towers have almost no scientific research capabilities. This has resulted in a situation where cooling tower manufacturers have similar products, slow updates, and difficulty in improving the overall level. 5. Enterprises do not pay attention to the use and management of cooling towers. As a kind of water-saving equipment, cooling tower has been developed * * One hundred years of improvement, improvement and enhancement have proven to be the only feasible and effective way to save water in industry. But many companies in our country are not taken seriously. Due to the long-term misunderstanding that water is "inexhaustible", people neither pay attention to nor care about the performance of cooling towers and the water reuse rate. When they find that the cooling requirements cannot be met, they just add more fresh water.
Thank you for reading. I have learned a lot. When getting a contract in China, many users only look at the price. The manufacturers only want to make money. If there are any problems, they will be solved later. vicious circle
I hope it can serve as a reminder and warning to all cooling tower users. Although cooling towers are not the main equipment, there is a saying circulating abroad, Cooling towers: Making money. (Cooling towers: Making money.: Money tree. ) Cooling towers: The overlooked profit center.: Overlooked Profit Center. ), showing its importance. Building a good cooling tower can save energy and water, and create maximum benefits for the enterprise.
The metaphor is appropriate! But the cooling tower has really come down from its glory days in the 1970s and 1980s. It doesn’t have advanced technology, but it just can’t be done well in China! What reason. . . . . . Soil problem! !
The cooling tower is actually very critical. The heat exchanged by the heat exchanger must be cooled down by the cooling tower. If the efficiency is not high, it will significantly affect production! :)
study* . Nowadays, basically the cooling water towers are blown by fans, and the water is distributed through the water distributor, and then cooled by the filler to reach the cooling temperature. When it comes to energy saving, it is nothing more than using variable frequency control fans or water turbines. Using frequency conversion, it is necessary to meet the temperature requirements of the process, which is basically only obvious in a few months with low temperatures. If a water turbine is used, enough excess head pressure is required.
Sadly, our factory once used a cooling tower from a factory in Hebei that was used for less than two years before it cracked and collapsed and had to be replaced.
* * I still don’t pay much attention to these, after all, they are not the original * * , Shenzhou spacecraft
Cooling towers shouldn’t be confidential. Can anyone send out samples from abroad?
Why are all the claims made during the bidding process so high that they all reach or exceed the international advanced level? money tree cool tower
Benefited a lot! Thank you, host~~~~~~~~~
Everyone’s wishes are good, but progress can only be achieved if the methods are appropriate
The energy saving of cooling towers mainly depends on the selection of fans and the use of energy-saving motors. The second is to adjust the number of fans according to the water temperature during operation. The third is to minimize the vortex formed by the rising steam between the filler and the fan when designing the cooling tower. The fourth is that the filler selection should ensure full contact between the water flow and the wind. The fifth is that the circulating water spray device should be selected to have a good spray effect and the circulating water is evenly distributed. The final cooling temperature of the circulating water is the local wet bulb temperature. Sixth, the wind splash loss should be as small as possible. Energy conservation of the circulating water system should also include concentration multiple control and selection of circulating water pumps.
The original poster is right. Our country can build airplanes.* * We are a very, very wasteful country, waiting for high-tech stuff. We all claim that we have a vast land and abundant resources, but in the past few years, many scholars have also pointed out that we have a vast land and limited resources. Water is decreasing every year, but it has not affected the attention of Chinese people. Water is still considered the cheapest product. If Beijing has no water, it can divert water from the south to the north. But if there is no water in the south, where can it be diverted? Why * * This is also regulated, that is also regulated. Why is water not regulated? Why don’t enterprises consider energy conservation as an essential factor in establishing an enterprise?
* * Just like a collection of personal natures, there is no way you can control it if you want to control it today. He is not a god! From the perspective of natural laws, there is no such thing as pollution or waste in the world... - All human beings have limited power to change anything. Human beings will not perish due to their own civilization or will end due to changes in the universe. Saving and so on is nothing more than making natural life live "better" and "longer".
I also feel a lot about everyone’s speeches. I wonder when the Chinese will be able to be as focused as the Japanese and as serious as the Germans. Only in this way can we do a good job.* * To prosper.
Only by updating technical standards in a timely manner and strictly implementing them can stubborn diseases be cured.
Personally, I feel that the main problem with cooling towers lies in design and operation management. 1. Many users do not carefully select manufacturers. 2. There are big problems in the selection of circulating water pump. The flow rate and head deviate greatly from the actual operation, which often causes the circulating water pump to operate in an inefficient area. The power of the circulating water pump is generally several hundred kilowatts, resulting in a great waste of electrical energy. 3. The operation management problem mainly lies in the leakage of circulating water. Some users even draw water from the circulating water pipe network for flushing and other purposes, causing huge waste and the concentration factor is even only 1. In addition, there are also problems with the interaction between cooling system management and chemical production systems.
I think so: There is insufficient research on the aerodynamic model of cooling towers and insufficient understanding of gas-liquid heat transfer. At the same time, scientific research units and production units are out of touch (theory cannot be connected with practice).
What the poster said is heart-breaking. As a cooling tower practitioner, I have deep feelings. Too many customers have chosen low-priced cooling towers, but what followed was a temperature difference in the summer, fillers blocking the entire process, minor repairs every year, and eventually rebuilding. Regardless of whether we serve our own business or customers, we must act conscientiously
There are also many problems in the manufacturing process. Various sizes are cheated, and the supervisor only looks at whether the envelope is thick or not. If the factory leaves all manufacturing to outsourcing, can anyone be hired? The inspection is not careful or not done at all.