Petroleum coke proportion adding control system

Abstract

The invention discloses a petroleum coke proportion adding control system, which at least comprises a first working area and a second working area, wherein the first working area consists of a petroleum coke bin A (1), a petroleum coke coal feeding machine A (5), a raw coal bin A (2), a raw coal feeding machine A (6), a coal grinding machine A (9) and a PID (proportional integral derivative) controller A (31), and the second working area consists of a petroleum coke bin B (4), a raw coal bin B (3), a petroleum coke coal feeding machine B (8), a raw coal feeding machine B (7), a coal grinding machine B (10) and a PID controller B (32). The petroleum coke proportion control system has the beneficial effect that through the combination of little content of ash in the petroleum coke and the independent working and the cooperative working of the first working area and the second working area, the adding amount of the petroleum coke is accurately controlled, the content of ash in the raw coal is reduced, and the required ash value is reached.

Description

technical field [0001] The invention relates to a petroleum coke ratio addition control system, in particular to a petroleum coke ratio addition control system for Shell pulverized coal gasification, and belongs to the technical field of chemical control systems. Background technique [0002] As a representative of the second-generation clean coal gasification technology, the Shell coal gasification process is widely used in various parts of China. It adopts an entrained bed reactor and uses dry coal powder as raw material for pressurized gasification, and has achieved large-scale production. Shell's coal gasification technology has the advantages of wide adaptability to coal types, high gasification pressure, high gasification efficiency, large single-series production capacity, and less pollution. However, due to different regions and different coal types, the production load and gas production rate of Shell's coal gasification are seriously restricted. Taking a certain c...

AI Technical Summary

Problems solved by technology

[0004] However, the ash content of petroleum coke is small. If the proportion of petroleum coke is too large or too small, the overall ash content of the coal fed into the furnace will inevitably fluctuate greatly, thereby affecting the uniformity and thickness of the slag hanging in the gasifier. The most serious problem is that the overall ash content is too high. If the gasification chamber is too small, the membrane wall of the gasification chamber will burn dry and burn through the equipment; at the same time, the sulfur content of petroleum coke is high, and the proportion is too large, which will also cause more corrosion of equipment and pipelines

Images