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.
Disruptive innovation technology for boiler auxiliary equipment - tube type air preheater intelligent automatic ash removal device replaces sound wave soot blower instead of steam soot blower instead of pulse soot blower. Anti clogging, anti-corrosion, anti coking and thorough cleaning of ash, intelligent automatic operation, stable and reliable operation, no maintenance cost, long service life. Air preheater is an important heat exchange equipment in the boiler body. At present, there are many types of air preheaters used in the market. Large and medium-sized boilers mainly use rotary air preheaters, while small and medium-sized boilers with hood covers mainly use tubular and heat-conducting air preheaters. These two types of air preheaters have their own advantages and disadvantages, but they all have a common disadvantage - they are prone to ash blockage and corrosion in the low-temperature section.
The desulfurization tower rotary ball dust removal device mainly consists of a rotary ball device body, a first stage rotary ball area, a second stage rotary ball area, a third stage rotary ball area, rotary balls, and stainless steel isolation plates. 1. Rotating ball device body: The top and bottom covers are welded with 8mm 316L stainless steel reinforcement, measuring 4cm x 15cm to 4cm x 25cm. The top cover is a movable door fixed with a locking device, and the outer stainless steel plate is welded. The upper part is equipped with a 52cm stainless steel isolation plate, and the outer protective plate is 40cm high and 3mm thick. It is welded with 316L stainless steel plate. 2. Level 1 spinning ball area: 8cm 316L stainless steel reinforcement is used according to the diameter inside the tower, which is divided into three parts. The part close to the inner circle is the Level 1 spinning ball area. 3. Level 2 spinning ball area: 8cm 316L stainless steel reinforcement is used according to the diameter inside the tower, which is divided into three parts. The second part close to the inner circle is the Level 2 spinning ball area. 4. Level 3 spinning ball area: 8cm 316L stainless steel reinforcement is used according to the diameter inside the tower, which is divided into three parts. The third part close to the inner circle is the Level 3 spinning ball area
A urea denitrification spray gun is independently produced for use in the field of SCR denitrification equipment technology, specifically involving an SCR denitrification spray gun The invention relates to the technical field of SNCR denitration equipment, in particular to a SCR denitration spray gun, which includes a urea spray gun pipe and an air pipe outside the urea pipe. The front end of the urea solution spray pipe is equipped with a nozzle, and the front end of the air pipe is connected by an air nozzle thread with a silicon nitride cover outside the ammonia spray nozzle. The gap between the ammonia spray pipe body, the air spray pipe body and the ammonia spray pipe forms a power assisted spray air duct, which helps the ammonia spray out of the nozzle into fog. The ammonia spray nozzle, air spray nozzle, and nozzle can be cooled in a timely manner. The temperature inside the boiler is high, and the interior is filled with dust particles, all of which are flowing at high speed. At high temperatures, coupled with the wear of dust particles on the nozzle, the denitrification spray gun is easily damaged.
Background of energy-saving transformation for fly ash reuse: The original 3 # dust removal and return system was powered by a Roots blower with a power of 18.5KW to supply air and transport fly ash to the boiler. To save energy, the original 3 motors were temporarily stopped (standby) and replaced with axial flow fans for compressed air blowing, effectively improving the efficiency of ash return and reducing the use of energy and electricity. The discontinuation of the original fan greatly saved electricity consumption and daily maintenance costs, saving about 222 kWh per unit and shift, and saving an annual electricity fee of 101232 yuan, which saved costs for the workshop. After experimental verification, it has been proven that the effect is significant. The blowing device of the fly ash re ignition system for boilers 1 and 2 has also been upgraded and transformed to compressed air assisted blowing, reducing power consumption and lowering production costs.
Background of the technical renovation of the primary air temperature of the waste heat heating boiler in the fixed discharge expansion vessel: In order to ensure a certain amount of discharge, namely continuous discharge and regular discharge, the 3 # boiler needs to meet the normal operation of the boiler. These wastewater are subjected to flash evaporation expansion in the designated discharge expansion container, and the flash evaporation steam is directly discharged into the atmosphere. Resulting in steam waste, in response to issues such as low exhaust gas temperature and poor heat transfer efficiency of the air preheater during the operation of the boiler and the discharge of exhaust gas from the fixed exhaust expansion vessel, after communication between workshop technicians and multiple technical personnel in the same industry, the exhaust gas from the fixed exhaust is used to heat the inlet air temperature of the primary fan, increase the primary air temperature, reduce the temperature difference of the boiler air preheater heat exchanger, increase the boiler operating cycle, and reduce waste of exhaust gas.
Innovation technology field of energy-saving system for boiler fly ash reignition: energy saving and consumption reduction, improving production capacity, and stable operation. Background conditions: The original 3 # boiler operated at a high bed temperature and load close to 980 ℃, which posed a risk of coking during operation. In addition, the risk factor of boiler load adjustment was relatively high. The outlet temperature of the furnace was between 880 ℃ and 920 ℃, which increased the combustible materials in the boiler fly ash, made it difficult to control nitrogen oxides, and increased the use of urea. This not only increased production costs, but also posed safety operation hazards.
