Low-temperature flue gas denitration technology is simple and effective with low-temperature oxidation technology (LoTox), because the main composition of nitrogen oxides in flue gas is NO (95%), NO is hardly soluble in water, and high-valence NO2, N2O5, etc. are soluble HNO2 and HNO3 are generated by water, and the dissolving power is greatly improved. It is easy to remove it from the flue gas by alkali spraying and other means. To convert the NO in the flue gas to a high valence state, it is necessary to introduce a strong oxidant. Among many oxidants, ozone is an environmentally friendly and clean strong oxidat, and will not produce secondary pollutants in the process of efficiently converting NO valences. With a relatively long life cycle, a small amount of oxygen or air is ionized to produce O3 and then sent to the flue gas, which can significantly reduce energy consumption. The ozone denitration system reduces NOx emissions by less than μg/g and meets stringent emission reduction requirements. It does not convert SO2 to SO3. In addition, particulates and sulfides in the flue gas have no obvious effect on the efficiency of ozone denitration or NOx removal. This system can not only effectively remove nitrogen oxides, but also can remove particulates such as sulfur dioxide and dust. There are also obvious removal effects. At the same time, it does not have the problem of blocking ammonia leakage.
Blast furnace oxygen enrichment
Increasing the production of blast furnace is the most important role of oxygen enrichment. Under the condition that the unit air consumption per unit of pig iron is constant, due to the high oxygen content of the blast and the reduction of nitrogen, the amount of formed gas will be reduced, and the reduction in the volume of gas will make the gas The slower flow rate in the blast furnace greatly reduces the resistance encountered by the gas rise and can intensify the blast furnace, ultimately increasing the production. Each 1%enrichment of oxygen can increase production by about 3%. It is another important role of the oxygen-enriched blast for ironmaking in modern blast furnaces to provide guarantees for increasing the amount of pulverized coal injection. Because the flame temperature before the tuyere is increased after the oxygen-enriched blast, the high-temperature zone in the furnace is reduced, which just compensates for the pulverized coal injection. The flame temperature decreases and the temperature field distribution changes.After the oxygen is enriched, the flame temperature rises and thehigh temperature zone moves downward, which is beneficial to the smelting of the pig iron with high content of reducing elements, such as cast iron, razor iron, ferrosilicon and the like. Iron-enriched iron used in this type of ironmaking can reduce the top temperature and reduce the raw material ratio. After the rich gas, the amount of gas formed by the combustion in front of the tuyere is reduced because the nitrogen content is relatively reduced, and the CO and H2 ar erelatively high. This can increase the reducing capacity of the gas and, on the other hand, increase the calorific value of the blast furnace gas (per An oxygen enrichment of 1%to improve 100.130KJ/m3) is beneficial to the gas-fuel balance of metallurgical enterprises.
Saving energy and reducing energy consumption The ordinary soda-lime-silica glass furnace can save 26%~30% energy, and the energy consumption of daily and special high-boron glass melting furnace can reach more than 30%. KingHOOD Gaseous System has developed a modular KG-100 VPSA oxygen generator suitable for the glass furnace kiln oxyfuel combustion industry, which comprehensively solves the problem of high oxygen cost in glass furnaces and kiln, 300 yuan per ton of oxygen. The glass has good melting quality and the glass viscosity decreases during the whole oxygen combustion. Colleagues, the oxy-combustion flame is stable, no commutation, the combustion gas stays in the kiln for a long time,and the pressure in the kiln is stable and low,which is beneficial to glass melting and clarification. To reduce bubbles, ash bubbles and streaks in the vitreous, all-oxygen combustion can make less than one bubble per ton of glass.Furnace and kiln construction costs are low. The structure of oxy-fuel furnace kiln is similar to that of unit kiln, and there are no small furnaces and regenerators. Due to the high melting rate, the required melting area of the same tonnage furnace is shaven, and the investment in refractory materials is reduced accordingly. The all-oxygen melting furnace has a single structure of a melting part, which occupies a small area and has low investment cost for building a kiln. The furnace has a long service life. The upper structure of the oxy-fuel combustion furnace can be constructed by electrofusion AZS bricks or high-quality silica bricks. The kiln age is more than 8 yeas.
Ozone is a bacteriolytic agent used for sterilization can completely and permanently eliminate all microorganisms inside the object. The principle is the use of cell walls that can destroy or dissolve microorganisms, rapidly diffuse into the interior of cells, oxidatively destroy intracellular enzymes, and cause cells to undergo permeability distortion leading to their dissolution and death. The disinfection of ozone is instantaneous and thorough. Compared with the traditional chlorine gas, the ozone sterilization capacity is 600-3000 times, and the range of pH change is large, and the dosage is large. Therefore, ozone can replace chlorine as a disinfectant to prevent the formation of carcinogens that may form in the water. Ozone has a strong lethal effect on viruses, spores, etc., while chlorine has little or no effect on the virus.Ozone is added to the excess sludge in the sewage treatment plant to make contact with the organisms in the mud, thereby destroying the cell membrane of the microorganisms, and making the sludge a biological sludge that is easily decomposed. This process improves the biodegradability of the sludge, almost The excess sludge can be completely removed without affecting the quality of the water treated in the entire process.
In order to save energy and increase production, develop self-heating, comprehensive utilization and environmental protection, oxygen smelting is being promoted. Non-ferrous metal ores such as copper, zinc, lead, cobalt, antimony and mercury are mostly present in the form of sulfides. The smelting reaction is mostly an oxidative exothermic reaction. Generally, non-ferrous metal sulfide ore contains 20% to 30% sulfur. Sulfur itself is a kind of fuel. 1 kilogram of sulfur is equivalent to 1.32 kilograms of standard coal. When oxygen is introduced into the non-ferrous metal smelting process, sulfur can be fully burned to maintain the smelting temperature. Improve the speed of smelting. Taking copper as an example, oxygen-rich copper smelting can save 50%,that is, the production of copper can be doubled under the same combustion conditions. The content of sulfur dioxide in the flue gas is increased, and sulfuric acid can be produced after recovery, and the amount of sulfide emissions is also reduced, thereby protecting the environment. According to statistics, the oxygen consumption perton of copper smelting reaches 300m3, and the purity of oxygen is greater than 90%.
The pure oxygen aeration process is basically the same as the air aeration activated sludge process, and the sewage is purified by biochemical reaction of the organic matter in the sewage by aerobic microorganisms. The difference is that the former is to fill the sewage with pure oxygen, the latter is to fill the sewage with air. A major feature of the oxygen aeration method is that the treatment efficiency is significantly higher than the air method. When the same sewage is treated to the same level, the aeration time required for the oxygen method is generally only about 1/3 of the air method. This is because the concentration of pure oxygen is 4.7 times that of oxygen in the air (21%). Therefore, the partial pressure of oxygen in the oxygen system, that is, the driving force of dissolved oxygen, is also 4.7 times higher than that of the air method. The saturation value CS is also increased by 4.7 times, and the oxygenation rate is also increased by 4.7 times, which significantly increases the oxygen transfer rate, thereby increasing the concentration and activity of aerobic microorganisms, and significantly improving the deficiency of the conventional activated sludge process.
We have successfully implemented the first industrialized pressure swing adsorption oxygen generator in China.
We are the first to provide a reliable oxygen generator for domestic pulp oxygen bleaching.
We have created a precedent for the operation of domestic pressure swing adsorption oxygen at low temperatures.
We solved the effect of temperature difference on the process.
We have developed the most advanced skid-mounted VPSA small oxygen production process.