Which company is the best at domestic dynamic wave design?

If your company has the financial resources, it is recommended to purchase foreign-made equipment. The United States holds the complete technology behind this; it is covered by patents. This technology was originally developed by DuPont, and later acquired by Monsanto in the U.S. It is used for producing sulfuric acid from low-concentration SO2. Due to the existence of these patents, domestic designs only have a superficial appearance – the core technology has not been mastered, which results in very low efficiency. Domestic technology and design are far behind those abroad. The Nanchang Institute of Design has designed many applications, and our factory’s new process makes use of their power wave technology; it is currently in the feasibility study stage

Domestically produced air pulse cleaners are essentially just imitations; unless they are replicated under identical conditions, their performance is usually poor, and in many cases it’s even inferior to that of dust removal systems using air towers. Apart from design, another important reason for the poor performance of domestically produced power waves is simplification – with few adjustments or replacements of nozzles being made.

I heard that Yixing Chemical Equipment Factory does a good job with power waves in this area

In terms of mastering power wave technology, Nanchang Nonferrous Metals Research Institute is likely the strongest. However, it seems that they are only involved in design work; for equipment manufacturing, one would have to turn to Yixing Chemical Equipment Factory. Yixing Chemical Equipment Factory is probably the strongest entity aside from Nanchang Institute, boasting strong capabilities in equipment processing. Shanghai Chemical Industry Research Institute has done considerable work in developing and improving power wave technology, but it seems that these efforts have not borne fruit – there has been no industrialization of such technologies.

A friend introduced me to Shuangyu in Wenzhou; it’s said to be very good.

The power wave technology is quite mature, and the Nanchang Institute is also good; I think the Nanhua Institute should be even stronger

I disagree. I’m aware of several devices of different sizes that were designed by the Nanchang branch, and I’ve heard no issues with them. Many small units are in use there as well, and it seems there are no problems either; however, they have changed their name to something like \"high-efficiency washers\"

The products from Shuangyu in Wenzhou don’t have the same quality or technical standards as those from Yixing. Nevertheless, they are usable.

Nanhua Institute is not strong in this area. The reason why Nanchang adopted the dynamic wave technology to develop its own high-efficiency cleaning methods is to cope with the harsh conditions of flue gases in the non-ferrous metallurgy industry. In the case of chemical sulfuric acid production, the conditions are not as severe; by using the Venturi effect, a good level of purification and temperature reduction can still be achieved. Therefore, the demand driven by these requirements means that Nanhua Institute is not strong in dealing with the technical aspects related to dynamic wave technology!

Venturi tubes have been tested only in plants with a capacity of 80,000 tons; they can barely be used in plants with a capacity of 100,000–120,000 tons. However, there is insufficient data regarding their dynamic performance and the design principles behind the nozzles. At even larger scales, venturi tubes become unsuitable. Venturi tubes offer high washing efficiency, require less acid for circulation, and result in moderate resistance to furnace gases; moreover, their initial investment is low. Tray washers are suitable for large-scale sulfur iron ore-based acid production plants. They provide good washing efficiency, with a slightly higher acid flow rate, but lower resistance to furnace gases. Yet their initial investment is high. High-efficiency washers have the highest acid flow rate and the greatest resistance to furnace gases, but they offer the best washing efficiency. Their initial investment falls between those of the two aforementioned types. Additionally, they have a wide range of applications.

Around 100,000 tons – which is more cost-effective, an empty tower or power waves?

I’m not very familiar with Nanhua Institute, but I know it’s the leader in acid production design in China; I thought they were all very strong. It was informative, thank you

The biggest problem with domestically produced similar equipment is flue gas short-circuiting! This has the following two effects: 1. Due to the short circuit of the flue gas, there is a layer of acidic sludge inside the reverse nozzle that provides protection, but its efficiency is low. 2. There are also cases where it happens that the flue gas does not experience short circuits, but due to improper operation, the fiberglass reverse nozzles are often burned out. To date, I have not seen any domestic company offering a performance guarantee for power wave equipment. This post was last edited by in the blink of an eye on 2008-11-24 12:42.]

Actually, whether it’s imported or domestically produced, there’s not much difference; the key lies in installation. I’ve observed the installation process for seven or eight sets of PowerWave systems, and I found that regardless of whether they were designed by Americans or Chinese, installation is very important. All of them were installed by Chinese workers. Power waves involve relatively large-scale equipment such as reverse nozzles, transition sections, flues, etc. Slight deviations during installation can result in some degree of deformation or displacement. Chinese workers often try to force these deformations and deviations to be corrected, which ultimately leads to uneven distribution of the liquid and causes the gas to flow in an abnormal direction.