Improve the single-furnace gas generation, realize 3 sets of 2400mm gas-making furnaces for 10 machines (L machines) adopt 10-19-9D type and 9-26-10D type fan series or D450 fans, so that the air volume in the furnace is stable and easy to control. . Increase the air volume, shorten the blowing time, increase the gas production time, greatly increase the gas production of the semi-water gas, and effectively use the air supply to increase the temperature of the gasification layer. Timely master the working conditions of the gasifier, that is, the temperature on the furnace, the temperature under the furnace, the cycle time, etc., so that the gas is produced under high-strength conditions, the coal gasification is sufficient, and the return focus is relatively small. The quality of the semi-water gas has changed significantly. The CO2 content has dropped from 10.2% to 7.3% 8.5%. The three furnaces have been supplied to 10 machines, the ammonia production has reached 96t/d or more, and the ammonia fuel consumption has been 1.176t Yangquan coal +0.576. t briquettes fell to 1.21t Yangquan coal.

It is an important condition for stable production and reduced consumption to ensure continuous and stable gas volume during operation. After the production equipment is determined, it is the goal of balanced and stable production to achieve maximum yield and stable production. In the non-standard production process, such as scientific management is not in place, command production is random, each class violates the normal production process conditions, blindly pursues production, and forms a low-yield interval in the production process, which artificially leads to the production system. fluctuation. In the class, 1112 machines are sometimes opened, the output is only up to 85t/d, and there is frequent parking phenomenon. One-month parking is stopped once a month, minor repairs are made once a month, and repairs are made in three months. The long-term passive situation of production is solved. The measures are as follows: (1) In the optimal state of gas production, the process parameters such as the air supply time, the amount of steam entering the furnace, and the speed of the furnace machine shall not be adjusted arbitrarily to ensure the stability of the gas volume, that is, the amount of semi-water gas produced. How much desulfurization is sent, under normal circumstances, it will not fluctuate.

(2) Improve the operating cycle and maintenance quality of the compressor, change the condition of the standby machine in the past, the working condition of the compressor is in good condition, and the pressure of each section should reach the equilibrium point to ensure the pressure balance of the system. Dozens of times to reach stable 3d no increase or decrease. Due to the fact that the production factors of the compressor are reduced to the minimum, it is possible to open the machine with 10 machines and the capacity of the single machine has been significantly improved, from less than 8.4t/d to 9.6t/d.

(3) Switch to the Roots machine for the near-way system to adjust the gas volume to ensure the balance of the inlet and outlet pressure of the Roots machine. The system's short-circuit must not be adjusted arbitrarily to ensure that the outlet pressure is a certain value. The output is determined by the pressure of the desulfurization system and the number of compressors, and the optimum pressure at the outlet of the desulfurization system is determined by the output. The desulfurization outlet pressure is constant, the number of compressors is on, and the final output is constant. The Roots machine is operating normally, and the outlet pressure is lower than the optimal value. The compressor's pumping volume is reduced, the output is reduced, and the pressure rise is determined by two factors: the compressor's air pumping capacity increases, the output increases, but the entire system deviates. The best condition; the internal leakage of the compressor is severe, and the gas quality is degraded, resulting in an increase in consumption. Insufficient air volume of the compressor and system pressure, resulting in an increase in the outlet pressure of the desulfurization system.

(4) Strengthen control over variable factors. Gas production cycle hydrogen, carbonized ammonia water concentration, solid-liquid ratio, tail gas (CO + CO2) content, synthetic ammonia cooling temperature, CH4 in circulating gas, copper ammonia cooling temperature, etc. are comprehensively reflected in the service life of the synthetic catalyst, 600mm double tower full load The operation was extended from 0.5 years to 2 years, and the 1000mm tower was operated at full load for 4 years.

(5) Strictly grasp the handover system. The shifting class must ensure the balance of operating conditions, there is no fluctuation of gas composition, circulating hydrogen, stable CH4, ammonia cold temperature does not fluctuate, carbonized ammonia absorption balance, dilute ammonia water, mother liquor, concentrated ammonia water balance, carbonization tower take out solid-liquid ratio and The export pressure of desulfurization is stable and reaches equilibrium and stable production.

According to the pressure of each post, find the problem of each section of the compressor. When the system reaches full load production, the temperature of the gas is adjusted normally and the amount of cooling water is adjusted to the minimum. The pressure of each section of the compressor determines the amount of gas, and the pressure of each position appears tiny. If changes occur, you should immediately find the cause, check the operation of the compressor, and find out the problem in time to ensure the stability of production.

(1) The outlet pressure of desulfurization is gradually increased. If the amount of gas entering the compressor is reduced, the inlet and outlet valves should be checked immediately for any bad conditions. Anthropogenic pressurization is another situation, such as forcing the booster and increasing the amount of pumping. The pressure is reduced, the compressor's air volume is increased, and all parts are in normal operating conditions. Under normal circumstances, the output of each class is constant, and the daily output should be similar.

(2) If the shifting pressure drops and the compressor blows down, the first and second sections of the inlet and outlet valves should also be checked for problems.

(3) The decarburization pressure drops, check whether the three-stage valve is normal, whether the gas is diverted to the carbonization system for the carbonization device, the pressure rises, the carbonization ventilation is small, and the valve and the valve of the compressor are to be inspected.

(4) The copper washing pressure drops.

Insufficient gas volume and insufficient air volume in the fourth, fifth and sixth sections of the L machine (insufficient air volume in the fourth and fifth stages of the six-stage compressor) or insufficient air volume in the first and second stages, whether there is overpressure in the first few stages. When the pressure rises, check whether the seven-stage valve is damaged. Check the six-stage valve for the six-stage compressor. The above points can analyze whether there is any problem in the pumping volume of each section of the compressor. At the same time, it is necessary to pay attention to the oil discharge of each section. Is there any problem with the venting straight-through valve of each section? Observe whether the balance condition of the system is normal, eliminate the doubtful points, and focus on the inspection. The part.

Comprehensively adopt various reform measures, standardize and optimize the number of gas-making furnaces with reasonable process indicators, and the number of compressors to achieve a certain optimal operating condition. It is an assessment standard for reasonable start-up economic operation, and it is energy-saving and consumption-reducing. The prerequisite for stable production.

The application of technological progress and scientific management in normal production has made production step into a period of balance and stability. The author personally experienced in the former Chifeng Chemical General Plant and Jilin Yushu Fertilizer Plant. The above are favorable measures to improve production balance, increase production and reduce consumption. .

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