High-efficiency GAG gasification furnaces are available

Pictured is the exterior of the test device in changyu GAG slag gasification furnace.
Recently, Jiangxi Changyu Industrial Co., Ltd. said that the high-efficiency GAG furnace industrial equipment by Changyu Industrial to provide process packages, designed by the National Comprehensive Class A qualified chemical design institute, the device since its completion, has carried out more than 100 tests, the last test achieved a stable operation of more than 800 hours, the technical indicators to meet the design requirements, than coal consumption 400 to 430 kg / kNm3, than oxygen consumption of 190 to 210
Nm3/kNm3, 180 to 200kg/kNm3, 0.9 to 1.1kg/Nm3, carbon conversion rate ≥99%, gas active ingredient (H2 plus CO) content 92% to 96%, steam decomposition rate ≥95%.
This is an important achievement of the cooperation between Changyu Industrial and the Doctoral Team of the Central Research Institute of China Oriental Electric Group, which provides an effective way for coal chemical enterprises to upgrade their technology and save energy and reduce emissions
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Self to market demand
China's coal gasification technology is a wide variety, of which fixed bed intermittent gasification furnace (UGI) is the largest, but also china's nitrogen fertilizer production of the main furnace type, but many gasification furnaces in the single furnace treatment, operating costs, energy consumption and environmental protection and other aspects of the shortcomings; Fixed bed pressurized gasification technology has the disadvantages of low gasification strength, large steam consumption, low carbon utilization rate and high purification cost caused by large amount of gasified sewage. Modern gasification technology has the advantages of high gasification strength, high steam utilization rate and high gasification efficiency, but it also has the disadvantages of high oxygen consumption and high construction cost. The development of new gasification technologies with a wide range of raw materials, excellent gasification indicators, low energy consumption, low operating costs and investment province has broad market application prospects.
this, Changyu Industrial and China Oriental Electric Group Central Research Institute to establish a cooperative relationship, the construction of a test base, joint attack with all parties have the advantages of coal gasification technology. After nearly two years of efforts, constantly test burning all kinds of coal species, improve equipment, optimize process conditions, successfully developed not only in line with environmental protection requirements, but also safe and advanced energy-saving new technologies and equipment - high-efficiency GAG furnace, for the current small and medium-sized fertilizer enterprises intermittent gasification upgrade to provide technical support.
According to Tang Wanjin, chief engineer of Changyu Industrial, the technology has comprehensive advantages such as high gas production rate, high resource utilization rate, low energy consumption, investment province, short construction cycle, low maintenance cost, safety and environmental protection. Coal species selection range is wide, can choose coal species in place, not only can burn smokeless small pieces of coal, but also can burn small coke, petroleum coke, but also can burn lower prices of lancoal, soot, lignite, long flame coal and other inferior coal species, thereby reducing production costs.
Innovating fusion of three technical advantages
the furnace innovatively "fixed bed" "normal pressure" "liquid slag" three technical advantages combined, both air flow bed slag gasification high gasification rate, high gasification strength advantages and fixed bed pure oxygenation oxygen consumption is low, high efficiency, low cost advantages. Compared with the existing fixed bed intermittent gasification technology, its active gas composition, gasification efficiency and steam decomposition rate increased by 20%, 4% and 50%, respectively. With the improvement of gasification thermal efficiency, oxygen consumption is reduced by more than 40% compared to gasification process of airflow bed, which can not only save a lot of electricity consumption, but also greatly reduce the short-term investment.
Tang Wanjin said that the GAG furnace core area temperature of about 2000 degrees C, gasification area temperature of about 1600 degrees C, a single furnace gas volume, high gasification strength (≥2500Nm3/m2.h), is more than three times the fixed bed gasification furnace. If replaced with AGAG furnace, the number of gasification furnaces can be greatly reduced, operators can be reduced, maintenance costs can be reduced. GAG furnace slag gasification process gasification temperature is higher, steam decomposition rate is greater than 95%, steam utilization rate is high, compared with other fixed bed furnace type, steam consumption is only about 50%, gasification furnace by-product steam can achieve self-seghum.
" the technology GAG furnace to small particles of anthostite or other coal species as raw materials, oxygen and water vapor as gasifiers, in the furnace high temperature state, carbon and gasifier redox reaction to produce high-quality water and gas, gasification after the remaining ash at high temperature into liquid, water cooling into glass state debris from the bottom of the chiller regularly discharged. Mr Tang said.
addition, the technology for continuous gas production, no blowing atmosphere and other harmful gas emissions, after the cooling of glass slag carbon low (≤1%), no pollution, can do cement, environmental protection bricks and other building materials; Gasification device no gas, dust leakage, clean and hygienic site. GAG furnace and supporting equipment structure is relatively simple, most of the normal pressure equipment, a small part of low-voltage equipment, materials for ordinary carbon steel, can be all in the domestic procurement and production, manufacturing, transportation, installation costs are low. For example, the construction of an annual output of 300,000 tons of synthetic ammonia plant, if the use of GAG furnace slag gasification technology, its gasification plant investment is only about 30% of the air flow bed device.
energy conservation and emission reduction has a "good
"The successful development of GAG furnace will provide an effective way for the technology upgrading, energy saving and emission reduction of existing coal chemical enterprises.
According to Changyu Industrial related technical personnel, the gas produced by this technology can be used as both high-heat gas, can also be used as high-quality chemical raw gas, more suitable for the need for medium and small amount of coal chemical enterprises, especially suitable for the upgrading of the existing fixed bed intermittent gasification process, can be To solve the existing intermittent gasification single furnace treatment volume is small, high energy consumption, high operating costs, "three waste" difficult to deal with and other issues, after the use of this technology, tons of ammonia coal consumption, steam consumption can be reduced by 150 kg, 900 kg, economic benefits are very considerable.
At present, the relevant departments of the state have clearly requested that by 2025, all coal chemical enterprises in use of fixed bed gasification furnace to be completely eliminated or upgraded, if replaced with large-scale coal slurry or powder gas flow bed process, not only large investment, long time, but also because of high gasification pressure, resulting in the existing front section of low-pressure equipment can not be used, causing serious waste of resources. At the same time, the air flow bed on the selection of raw materials requirements, from the point of view of economic energy conservation, safety and environmental protection, the choice of GAG furnace instead of fixed bed gasification furnace will be the best choice.
GAG furnace slag gasification process can make full use of the existing intermittent gasification furnace plant and most of its ancillary equipment for transformation, follow-up gas cabinet, desulfurization, compression and other sections of most can not move, the transformation can be slightly expanded energy transformation. Furnaces can be modified while producing, one by one, will not have a major impact on production.
the choice of GAG furnace will also greatly improve the existing process technology level for enterprises, improve gasification efficiency, reduce all kinds of energy consumption, reduce operators, reduce maintenance costs, greatly reduce operating costs, improve economic efficiency. At the same time for enterprises to reduce emissions, waste water, slag emissions, improve the production environment, to solve the problems that have plagued enterprises for many years of environmental protection.
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