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Backup system flow setting of air separation device with 2%/min variable load capacity

A technology of air separation unit and backup system, which is applied in the field of backup system process setting, and can solve problems such as slow load change

Inactive Publication Date: 2021-06-08
HUANENG TIANJIN COAL GASIFICATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of increasing the load, due to the slow speed of the load change of the air separation unit, there is a certain oxygen gap

Method used

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  • Backup system flow setting of air separation device with 2%/min variable load capacity
  • Backup system flow setting of air separation device with 2%/min variable load capacity
  • Backup system flow setting of air separation device with 2%/min variable load capacity

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0022] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0023] Please refer to Figure 1-3 , the embodiment of the present invention provides a kind of back-up system process setting with 2% / min variable load capacity air separation unit, comprises the following steps: wherein,

[0024] Step 1: The liquid oxygen generated by the air separation unit is ...

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Abstract

The invention discloses backup system flow setting of an air separation device with 2% / min variable load capacity. Liquid oxygen generated by the air separation device is stored in a liquid oxygen storage tank, and when a power grid gives an instruction IGCC unit to increase the load at the speed of 2% / min, the air separation device increases the load at the speed of 1% / min. A backup system liquid oxygen pump is started, the liquid oxygen is pumped from the liquid oxygen storage tank to be pressurized and vaporized into oxygen in a liquid oxygen water bath vaporizer, the oxygen and oxygen generated by the air separation device are gathered into an air separation oxygen delivery pipeline to be delivered to a gasification furnace, and the other speed of 1% / min is supplemented. The liquid oxygen pump runs at constant flow, the liquid oxygen except the vaporized oxygen amount needed at the peak flows back to the liquid oxygen storage tank from the back of the liquid oxygen pump, and the needed liquid oxygen is delivered out after being vaporized through a water bath. After the air separation oxygen yield can meet the gasification requirement, the backup system oxygen exits, and the liquid oxygen pump stops. A backup system has the capacity of rapidly adjusting oxygen delivery, the flow of improving the variable load capacity of the air separation device from 1% / min to 2% / min is achieved, and therefore the requirement that the 2% / min variable load capacity of the IGCC unit adapts to power grid dispatching is met.

Description

technical field [0001] The invention relates to the technical field of air separation devices, in particular to a backup system flow setting of an air separation device with a variable load capacity of 2% / min. Background technique [0002] IGCC power station, that is, integrated coal gasification combined cycle power generation system, is an advanced power system that combines coal gasification technology and efficient combined cycle. The pure oxygen and pulverized coal produced by the cryogenic air separation unit are used for incomplete combustion reaction in the gasifier to generate synthesis gas. After purification, the synthesis gas is used as fuel gas to burn in the gas turbine to drive the generator. After combustion, the high-temperature gas After entering the waste heat boiler, the water is heated to generate steam to do work in the steam turbine to drive the generator. [0003] After the air separation unit compresses and purifies the air, it enters the cold box t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J3/04C10J3/72
CPCF25J3/04545C10J3/72C10J2300/0959F25J3/0483F25J3/04824F25J2235/50F25J2250/50Y02E20/18
Inventor 王相平宋石磊钱金葵秦建明祁海鹏李志强文子强许冬亮贾东升李征夏勇张建广熊小强王绍博李兵嵇余成尼君顾文鹏郭保帅
Owner HUANENG TIANJIN COAL GASIFICATION POWER CO LTD
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