Hearth temperature control device and control method for multi-nozzle opposed coal water slurry gasification furnace

A furnace temperature and control method technology, which is applied to the gasification of granular/powdered fuels, the manufacture of combustible gases, and the petroleum industry. spray effect

Active Publication Date: 2011-09-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Second, the temperature and the oxygen-coal ratio are not related to form a control loop, which requires manual intervention to change the furnace temperature by manually adjusting the amount of oxygen injection.
Third, due to the separate control of each nozzle, the balance of the flame in the furnace cannot be guaranteed
Otherwise, if the injection flow rate in a single nozzle is too high, it will inevitably cause the flame in the furnace to deviate from the center, causing the local temperature to be too h

Method used

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  • Hearth temperature control device and control method for multi-nozzle opposed coal water slurry gasification furnace
  • Hearth temperature control device and control method for multi-nozzle opposed coal water slurry gasification furnace
  • Hearth temperature control device and control method for multi-nozzle opposed coal water slurry gasification furnace

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Embodiment Construction

[0036] The following examples help to understand the present invention, but do not limit the content of the present invention.

[0037] The designed control loop is configured by using Process Knowledge System (PKS) of Honeywell. The process targeted by the control system is a four-nozzle opposed gasifier, with a total of A, B, C, D four-way nozzle systems. In this embodiment, the inherent functional modules in the adopted PKS have the following categories:

[0038] 1. Each coal water slurry flow measurement module FI1203A(B, C, D)_1; each oxygen flow measurement module FI1303A(B, C, D)_1; each coal water slurry concentration measurement module FI1403A (B, C, D)_1; dry coal density measurement module FI1503A(B, C, D)_1; furnace temperature measurement module TI1304;

[0039] 2. Output module FV1203A(B, C, D)_1 for controlling the valve opening of each coal-water slurry flow; output module FV1303A(B, C, D)_1 for controlling the opening of each oxygen flow valve;

[0040] 3. ...

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Abstract

The invention discloses a hearth temperature advanced control method for a multi-nozzle opposed coal water slurry gasification furnace. The method comprises the following steps of: controlling oxygen-coal proportion of the gasification furnace; controlling temperature of a hearth of the gasification furnace and performing balancing control of nozzles; and controlling temperature of the hearth. Byadopting the gasification furnace hearth temperature control scheme, the problems of large oxygen-coal proportion fluctuation of a basic control loop, flow unbalance of four paths of nozzles and deflective flame spouting can be solved; the temperature of the hearth can be stabilized at a set value, the oxygen-coal proportion of each path of nozzle is coordinated and deflective spouting is avoidedunder the conditions of frequent changing of coals and flow fluctuation of the coal water slurry; therefore, running period of the gasification furnace is obviously prolonged and economic benefit of the coal gasification device is increased.

Description

technical field [0001] The invention relates to a furnace temperature control method, and relates to a furnace temperature control device and method for a multi-nozzle opposed type coal-water slurry gasification furnace. Background technique [0002] my country is rich in coal resources but scarce in oil and gas resources. This special energy resource structure determines that coal will be the main energy source in my country for a long time. However, the overall efficiency of my country's coal utilization rate is low and the pollution is serious. Coal gasification is an important way of clean and efficient utilization of coal resources, and an important technical basis for the development of energy industry and chemical industry. Coal gasification technology has a leading position in modern coal-based energy and chemical systems. Coal gasification technology can be divided into coal water slurry gasification technology and pulverized coal gasification technology according ...

Claims

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Application Information

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IPC IPC(8): C10J3/46C10J3/48C10J3/50C10J3/72
Inventor 钱锋程辉钟伟民杜文莉刘朝孔祥东
Owner EAST CHINA UNIV OF SCI & TECH
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