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Gasification furnace load adjusting and efficiency improving system and working method thereof

A technology of gasification furnace and load, which is applied in the field of gasification furnace load adjustment and efficiency improvement system, which can solve the problems that gasification efficiency cannot be further improved, energy consumption is large, and fly ash residual carbon cannot be accurately controlled.

Inactive Publication Date: 2021-04-23
HUANENG CLEAN ENERGY RES INST
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] In the existing gasification furnace combustion process, the residual carbon of fly ash cannot be accurately controlled, the energy consumption is large, and the gasification efficiency cannot be further improved
At the same time, in order to ensure that the inlet temperature of the waste pot is suitable in the existing process, the amount of chilled air is generally turned on to the maximum, resulting in a large waste of chilled air and increasing the energy consumption of the device
When the gasifier needs to adjust the load, the amount of chilled gas and oxygen is difficult to give immediate feedback to the load of the gasifier, and it takes a lot of time to make the gasifier reach the ideal operating state

Method used

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  • Gasification furnace load adjusting and efficiency improving system and working method thereof

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Effect test

Embodiment 1

[0065] The detailed parameters of a one-stage gasifier are as follows:

[0066] 1920t / d dry pulverized coal pressurized gasifier, dry basis coal carbon content 70%, fly ash output, synthesis gas flow detection device 3 measured fly ash output is 7000kg / h, fly ash residual carbon online detection device 2 The carbon residue in the fly ash was measured to be 5%.

[0067] Set 4 burners, each burner feeds 20000kg / h; each burner feeds oxygen 15200kg / h; each burner feeds steam 1638kg / h; synthesis gas specific heat λ=1.444KJ / Nm 3 ℃

[0068] After the gasification furnace load adjustment and efficiency improvement system of the present invention is started, the amount of oxygen fed to each burner increases by 93kg / h through this system, the residual carbon of fly ash drops to 1%, and the amount of chilling air increases: △M 4 =847.3Nm 3 / h, the effective gas volume increases by 470Nm 3 / h.

Embodiment 2

[0070] 1920t / d dry pulverized coal pressurized gasifier, the carbon content of dry coal is 70%, set 4 burners, each burner feeds 20000kg / h; each burner feeds oxygen 15200kg / h; each burner Mouth plus steam 1638kg / h; synthesis gas specific heat λ=1.444KJ / Nm 3 ℃. Now adjust the gasifier to 80% working condition. Turn on the gasification furnace load adjustment and efficiency improvement system of the present invention, through this system, the amount of oxygen fed to each burner is reduced by 3690kg / h, the residual carbon of fly ash is reduced to 1%, and the amount of chilling air is reduced: △ m 4 =45294Nm 3 / h.

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Abstract

The invention discloses a gasification furnace load adjusting and efficiency improving system and a working method thereof, and belongs to the technical field of gasification furnaces. An ash removal unit is connected with a waste boiler outlet of the gasification furnace and a washing unit, a washing unit is connected with a chilling gas circulation compressor, and the chilling gas circulation compressor is connected to a chilling gas inlet of the gasification furnace. A fly ash residual carbon online detection device and a fly ash yield and synthesis gas flow detection device are arranged on a connecting pipeline between the ash removal unit and a waste boiler outlet of the gasification furnace, a waste boiler inlet temperature detection device is arranged at a waste boiler inlet, and an oxygen regulation unit is connected with an oxygen supply system of the gasification furnace. A chilling gas flow detection device is arranged on a connecting pipeline between the washing unit and the chilling gas circulation compressor, and a chilling gas adjusting unit is connected with the chilling gas flow detection device and the chilling gas circulation compressor; the detection devices and the adjusting unit are connected to a control unit. The system can accurately control the gasification efficiency and the chilling gas amount, reduces the energy consumption, and ensures the efficient and stable operation of the gasification furnace.

Description

technical field [0001] The invention belongs to the technical field of gasification furnaces, and in particular relates to a gasification furnace load adjustment and efficiency improvement system and a working method thereof. Background technique [0002] Coal gasification technology is the core technology for clean and efficient utilization of coal, and the key technology for the development of advanced energy systems such as clean coal power generation, coal chemical industry, and coal-based polygeneration, which has an important impact on the operational reliability and economy of each system. Driven by the rapid development of modern coal chemical projects, coal gasification technology is developing in the direction of large-scale, clean and efficient, and wide-range coal adaptability. The development of coal gasification technology presents a situation where a hundred flowers are blooming, but in the development process of efficient and clean coal gasification technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/72C10J3/84C10J3/86
CPCC10J3/723C10J3/84C10J3/86C10J2300/1615C10J2300/1628
Inventor 罗丽珍王鹏杰许世森刘刚任永强陶继业李小宇刘沅陈智樊强秦建明董良王瑞超
Owner HUANENG CLEAN ENERGY RES INST
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