The super gravity coal lock gas purification technology "coal lock gas" is the gas containing dust and tar released by the coal lock during the coal pressure gasification process. Under normal pressure, it needs to be pressurized by a compressor before entering the subsequent process. The tar dust content in the coal gas from the gas cabinet of Xinjiang Guanghui New Energy Co., Ltd. exceeds 1000mg/m ³, causing the compressor to be blocked and unable to operate normally. The coal lock gas can only light a sky lamp, causing environmental pollution and resource waste. The super gravity wet dust removal technology uses gasification circulating water as the purification medium, with a liquid consumption of only 8m ³/h, and the tar dust content in the coal lock gas is about 500-1000mg/m ³. After super gravity wet purification, the tar dust content in the gas is between 20-1000mg/m. Around 80mg/m ³, the purification rate can reach over 90%, and the annual gas recovery is 230 million m ³. The working cycle of the compressor has been increased from 5 days to over 6 months, and the purification effect is good. Solved the industry problem of environmental pollution and resource waste caused by the combustion emissions of coal lock gas torches. The promotion and application of this technology in the Xinjiang Xintian Coal Chemical Coal to Natural Gas Project has good prospects for industrial application.
In the production process of modern coal chemical industry, the compressor is often required to pressurize after the purification of coal gas. A small amount of tar, dust and other impurities in the gas are easy to block the compressor valve, affecting normal production. The technology of super gravity dust removal and tar removal has the following characteristics: (1) it achieves high-precision purification, and the concentration of tar and dust can be reduced to below 5mg/m ³; (2) The liquid usage is small, and the gas-liquid ratio during operation can reach around 2000; (3) The gas phase pressure drop is small, below 800Pa; (4) Gas making circulating water can be used as a washing solution, which is convenient and reliable. This technology is applied to the 200000 ton/year synthetic ammonia compressor inlet semi water gas dust removal technology renovation project of Guizhou Kailin Xifeng Synthetic Ammonia Phase I. Under the working condition of an inlet dust content of about 60mg/m ³, the dust removal rate can reach over 90%, and the purification footprint content is less than 5mg/m ³, ensuring the long-term stable operation of the compressor. This technology can be widely applied to the deep purification process of compressor inlet gas in projects such as ammonia synthesis, coke oven gas to methanol production, and coal to hydrogen production.
In response to the problems of large equipment and safety hazards in the liquid ammonia gasification process of SCR denitrification system, "super gravity ammonia water blowing" is adopted instead of "liquid ammonia gasification" to eliminate hazards and achieve intrinsic safety. Applying the enhanced technology of supergravity chemical process to ammonia water blowing and developing supergravity ammonia blowing equipment and technology suitable for denitrification process, blowing free ammonia in ammonia water to the gas phase, and adding it as a nitrogen source to the furnace for denitrification greatly improves the denitrification rate, reduces pollution, and has the characteristics of small equipment volume, low production cost, and high intrinsic safety. This technology is applied to Shanxi Pingshuo Coal Bangshi Power Generation Co., Ltd., with a single equipment processing ammonia water volume of 0.1-0.8m ³/h, dilution air volume of 1000-2400m ³/h, ammonia water stripping rate of over 95%, NOx emission concentration less than 100mg/Nm ³, and ammonia escape concentration less than 8mg/Nm ³.
During the nitrification process in the fire industry, high concentrations of nitrogen oxides (commonly known as "nitrate smoke") are emitted, causing serious pollution and making it difficult to control. The traditional atmospheric purification technology adopts multi-stage absorption, but the effect is still not ideal, with emission concentrations as high as about 5000mg/m ³. North China University has applied supergravity technology to the purification and treatment of high concentration nitrate smoke in the fire industry, and created a water cooling process for supergravity atmospheric pressure purification of high concentration NOx. After adopting this process, with an inlet concentration of 18000mg/m, through two-stage deep purification and supergravity absorption, combined with the reduction decomposition tower process, the nitrate concentration can be reduced to below 240mg/m ³, and the NOx emissions can be reduced by 95%, meeting the emission standards. Compared with existing tower equipment, the cost can be reduced by more than 30%, the investment can be saved by 75%, and the operating costs can be reduced by 79%. This provides a new method for effectively solving the problem of high concentration nitrate pollution and has good industrial application prospects. Demonstration projects have been established in Xing'an, Shanxi and Yinguang, Gansu.
In response to the characteristics of the large volume, low efficiency, large liquid circulation volume, and high operating costs of the desulfurization tower in the wet oxidation desulfurization process, the high gravity rotating packed bed is used as the absorption equipment to form the high gravity wet oxidation technology for removing hydrogen sulfide. The advantages of the high gravity wet process for removing hydrogen sulfide are as follows: (1) the hydrogen sulfide removal rate is over 95%; (2) The gas-liquid ratio of desulfurization is greater than 100; (3) Gas phase pressure drop less than 1000Pa; (4) The equipment volume is 1/10 of a traditional tower; (5) The investment and operating costs are 2/3 of the tower desulfurization method; (6) Transforming hydrogen sulfide into sulfur, turning waste into treasure, without secondary pollution.
In response to the characteristics of the large volume, low efficiency, large liquid circulation volume, and high operating costs of the desulfurization tower in the wet oxidation desulfurization process, the high gravity rotating packed bed is used as the absorption equipment to form the high gravity wet oxidation technology for removing hydrogen sulfide. The advantages of the high gravity wet process for removing hydrogen sulfide are as follows: (1) the hydrogen sulfide removal rate is over 95%; (2) The gas-liquid ratio of desulfurization is greater than 100; (3) Gas phase pressure drop less than 1000Pa; (4) The equipment volume is 1/10 of a traditional tower; (5) The investment and operating costs are 2/3 of the tower desulfurization method; (6) Transforming hydrogen sulfide into sulfur, turning waste into treasure, without secondary pollution.
