Igniting method for gasification furnace start-up burner
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A technology for start-up burners and gasifiers, which is applied to combustion methods, burners, and controlled combustion. It can solve problems such as failure to ignite, easy burnout of start-up burners, and difficulty in igniting coal burners, so as to reduce the number of ignition failures. , Improve the success rate of driving and the effect of improving the success rate of ignition
Inactive Publication Date: 2012-09-26
HENAN LONGYU COAL CHEM
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Problems solved by technology
The main disadvantages of this process operation mode are: (1) The pure oxygen combustion of the start-up burner causes the head of the start-up burner to overheat, and the start-up burner is easy to burn out and leak, so that the start-up burner cannot operate normally; (2) The start-up burner cannot work normally ignited, causing the coal burner to be difficult to ignite or unable to ignite, thereby affecting the normal operation of the entire system; (3) maintenance operations are time-consuming, laborious, and labor-intensive, the operating environment is poor, and online operations are delayed, which seriously affects the construction period
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Embodiment 1
[0015] Example 1 : For the ignition method of the gasification furnace start-up burner, see figure 1 , before the start-up burner is ignited, the start-up burner valve 8 is opened, and the start-up burner 7 is put into the hearth of the gasifier 9 .
[0016] Open the first nitrogen shut-off valve 6 and the second nitrogen valve 4 to purge the start-up burner, and observe the flow of the first nitrogen flowmeter 2 and the second nitrogen flowmeter 5 at the same time. In the case of blockage and no leakage, control the flow of the second nitrogen flow meter 5 to 450 Nm 3 / h, the flow rate of the first nitrogen flow meter 2 is 3200 Nm 3 / h, the duration of nitrogen purge burner is 30-40s.
[0017] After purging, start the ignition of the burner, first open the oxygen valve 10 to feed pure oxygen, open the diesel valve 3 to feed diesel, and gradually adjust the opening of the first nitrogen regulating valve 1, when the valve opening is 0.9% At about 0.02 kg / s, the flow rate o...
Embodiment 2
[0020] Example 2 : basically the same as Embodiment 1, the difference is:
[0021] During the ignition process of the start-up burner, adjust the opening of the first nitrogen regulating valve 1 to 0.3%, the nitrogen flow rate to 0.01kg / s, the oxygen flow rate to 1.15kg / s, and the diesel flow rate to 0.3kg / s.
Embodiment 3
[0022] Example 3 : basically the same as Embodiment 1, the difference is:
[0023] During the ignition process of the start-up burner, adjust the opening of the first nitrogen regulating valve 1 to 3%, the nitrogen flow rate to 0.05 kg / s, the oxygen flow rate to 1.40 kg / s, and the diesel flow rate to 0.45 kg / s.
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Abstract
The invention relates to an igniting method for a gasification furnace start-up burner. The method comprises the following steps of: before ignition, putting a start-up burner into a hearth of a gasification furnace and purging the start-up burner with nitrogen; and in the ignition process, introducing pure oxygen and diesel into the start-up burner, adjusting nitrogen flow, wherein the pure oxygen flow is 1.15-1.40kg / s, the diesel flow is 0.3-0.45kg / s, and the nitrogen flow is 0.01-0.05kg / s. According to the invention, through introducing certain nitrogen in the ignition process and replacing pure oxygen combustion with oxygen enriched combustion, the phenomenon that the start-up burner is easy to damage because of partial overheating is avoided effectively, and the phenomenon that the start-up burner is damaged by the greater temperature fluctuation of the start-up burner caused by the frequent adjustment of the flow of the fuel diesel in the start-up burner is avoided simultaneously; the ignition success rate of the gasification furnace is improved, the labor intensity is reduced, the production cost is saved, and the maintaining expense is reduced.
Description
technical field [0001] The invention relates to an ignition method for a gas furnace, in particular to an ignition method for a start-up burner of a gasification furnace. Background technique [0002] In the Shell coal gasification industry, during the start-up process of the gasifier, it is necessary to use the ignition burner to ignite the start-up burner, and then ignite the coal burner. Before the gasifier is ignited, the air in the furnace needs to be replaced with an inert gas, and after the replacement is qualified, oxygen is introduced, and the instrument air is used as a combustion aid, and the liquefied petroleum gas is used as a fuel for normal ignition of the ignition burner. When the flame signal of the ignition burner is stable, it is necessary to use the pure oxygen sent by the air separation as a combustion aid and the start-up burner with diesel as fuel to ignite. When the flame of the start-up burner runs stably for 5 minutes, the gasifier starts to heat u...
Claims
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