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How can the gas generation capacity of a gas generator be increased

2009-09-14View Original

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As coal prices in our country continue to rise, the production costs of synthetic ammonia are also increasing. How can the gas generation rate per furnace be increased, thereby reducing the production costs of ammonia synthesis?
Reply #22009-09-14
The gas production volume is closely related to the coal quality and operating parameters: 1. For gasification, what matters is the content of useful gases (i.e., CO+H2); therefore, the operating temperature and oxygen level need to be carefully controlled, as excessive oxidation will lead to an increase in CO2 levels and simultaneously result in higher consumption; 2. Coal quality is a crucial factor; differences in the carbon content and ash content of coal lead to significant variations in the gas generation capacity (effective gas content).
Reply #32009-09-14
14. Main measures to increase the gas generation per furnace and reduce consumption: 1. Increase the blowing intensity. Increasing the blowing intensity not only boosts the reaction rate, shortens the blowing time, and increases the effective gas production time, but it also suppresses the occurrence of side reactions and reduces consumption. The specific measures to increase the blowing intensity are as follows: 1. Use a fan with higher air pressure. 2 Increase the air inlet ducts and valves to reduce blowing resistance. 3 Choose a grate with uniform air distribution, a large ventilation area, low gas resistance, and strong slag-breaking capacity. 4 Adjust the blowing time in a timely manner according to changes in temperature and relative humidity to maintain an appropriate blowing intensity. 2. Reasonably control the temperature above and below the furnace to improve gasification quality. The levels of temperature above and below the furnace can indirectly reflect the condition of the gasification zone inside the furnace; if the temperature is too high, there is significant heat loss and scorching is likely to occur. If the control is too low, the temperature of the vaporization layer is low, resulting in poor vaporization quality. Only by properly controlling the temperatures above and below the furnace can a thicker and more stable gasification layer be achieved, thereby improving the quality of gasification. 3. Reduce system resistance and control the steam pressure entering the furnace appropriately. During the gas production process, reducing the pressure facilitates the reaction to proceed in the direction of producing carbon monoxide and hydrogen, thereby yielding semi-water gas of higher quality. To reduce pressure, it is necessary to start by lowering the system resistance, and then appropriately control the steam pressure entering the furnace. The following measures should be taken specifically. 1 Increase the diameter of the upstream and downstream gas pipelines as well as the valves. 2 Improve the waste heat boiler to increase the gas flow area while enhancing heat recovery efficiency. 3 Appropriately reduce the depth to which the inlet pipe of the scrubber tower is inserted into the water seal. 4 Change the scrubber tower from a packed tower to an empty-tower spray type. 5 On the basis of reduced system resistance, the steam pressure entering the furnace should be appropriately lowered. 4. Appropriately increase the carbon layer height. The carbon layer height is primarily determined by the blowing intensity; increasing the carbon layer appropriately can boost the steam decomposition rate and improve gas quality, but adjustments should be made promptly in response to changes in the blowing intensity. 5. Adopt effective new technologies and equipment. The new technologies and equipment that have been successfully used so far include ; 1. Blower gas recovery system 2. Micro oil pressure automatic control system 3. Steam feed auto-regulation and hydrogen-nitrogen ratio auto-regulation system 4. Temperature, flow rate, and gas composition detection system. 6. Strictly control the quality of coal fed into the furnace. 7. Establish strict management and assessment methods, and implement them resolutely. 1 Formulate and improve various management systems. Things such as equipment management, process management, shift handovers, and reward and punishment systems ensure that operators have clear guidelines to follow and can carry out their tasks carefully. Ensure that the starting and ending temperatures at the top and bottom of the furnace are on the same level, and that the temperature in the ash bin is also consistent; the temperature difference between the two ash bins should be less than 50°C. Additionally, as the grate mechanism rotates one full cycle, the variation in the gas production cycle time should be minimal, in order to maintain stable furnace conditions. 2 Strictly implement the assessment, reward, and punishment system. Based on fluctuations in furnace temperature, gas generation volume, the quality of semi-water gas, coal consumption, steam consumption, the operating condition of the gas generator, and whether any accidents occur, regular summaries and evaluations are conducted to reward those who perform well and hold those who perform poorly accountable. At the same time, it is necessary to ensure coordination and balance among the operating shifts, enhance the enthusiasm and sense of responsibility of gas production managers and operators, prevent all types of accidents, and achieve high production levels, stable operation, low consumption, and long-term operational continuity.
Reply #42009-12-04
1. Choosing a furnace with a high height-to-diameter ratio and using an efficient blower are essential for ensuring high gasification efficiency. 2. The grate is the heart; special attention should be paid to air distribution and slag breaking. 3. The coal feeding system is the “mouth,” while the ash removal system is the “buttocks.” All need to be carefully adjusted to ensure that it can be eaten and digested. The focus is on the adjustment of the coal feeder and the small ash scraper. Prevent uneven heating and sparking.
Reply #52010-03-22
“\"Stable production leads to high output\" also applies to the gas production position. In general, for manufacturers, stable gas production implies stability throughout the entire production system. In other words, only when the supply volume and gas quality at the gas supply station remain stable can the subsequent processing steps maintain stable operating conditions, optimize the production process, and control key parameters, thereby maximizing ammonia synthesis output. With an ideal ammonia production volume, there is also a relatively ideal level of raw coal consumption. The stability of gas production follows the principle of \"ensuring stability by securing all aspects\": the first is the stability of the raw materials fed into the furnace. Based on the physical and chemical properties of the raw materials used, a scientific analysis should be conducted to ensure a proper combination and even distribution of these materials, thereby achieving a consistent quality of the fuel fed into the furnace and laying a solid foundation for the stable operation of the gas stove. Second, it is necessary to carry out proper maintenance and scheduled inspections of the equipment. It should be particularly noted that proactive, planned, and systematic maintenance is the goal in equipment upkeep, with the aim of minimizing or eliminating the need for reactive repairs due to sudden equipment failures. Third, the maintenance and adjustment of the operating process must be kept relatively stable and consistent. Effective process discipline is essential to ensure this. Fourth, the stability and consistency of operational concepts and methods. This aspect is mainly determined by the professional competence of the respective operators. However, gas production managers should also provide them with specific and unified operational control parameters as much as possible. For example, based on the furnace type, fuel conditions, and load level, appropriate carbon layer heights and furnace rod motor speeds are determined. Fifth, the stability of the pressure and temperature of the incoming steam plays a crucial role in ensuring the stability of gas production. Large fluctuations in steam pressure and temperature can directly affect the temperature of the gasification zone in coal gas furnaces, as well as the gas production volume and the composition of the gas; this can lead to instability in the operation of the furnace, thereby affecting the stability of the entire coal gas production system. Sixth, maintaining an appropriate excess supply of gas is an important measure to ensure stable gas supply at the coal gas production sites. Seventh, establishing effective incentive mechanisms to fully unleash the potential of gas production personnel is a fundamental guarantee for ensuring the stable operation of the gas production system.

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