Semicoke passivation technology and system

Abstract

The invention discloses a semicoke passivation technology and system. The system comprises a chilling zone, a spraying zone, a cooling zone, an oxidation zone, a delivery device and a water supply device, wherein the chilling zone, the spraying zone, the cooling zone and the oxidation zone are transversely arranged. According to the system, semicoke passivation can be achieved only through water and air at low cost with a simple method, and passivated semicoke is stable in state.

Description

technical field [0001] The invention relates to a passivation process and a passivation system, in particular to a semi-coke passivation process and a passivation system using the process. Background technique [0002] Low-rank coal upgrading technology is a rising technology for processing low-rank coal, which is used to process low-rank coal with high moisture content and high volatile content, so as to produce semi-coke and coal tar products. However, because the semi-coke after pyrolysis has high activity, is prone to spontaneous combustion and cannot be transported over long distances, the utilization of semi-coke is currently a major problem in the industry. [0003] Patent No. 201310002721.1 discloses a passivation method for active coal, which proposes to implant or set low-temperature cooling purge gas, such as air, CO2, N2 and / or inert Gas blowing device and exhaust device for forcedly discharging oxidizing gas, a small amount of low-temperature volatile gas and c...

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Problems solved by technology

[0006] However, the use of inhibitor technology in the prior art achieves the inhibitory effect by isolating coal and oxygen contact or retaining water and moisture. Their main inhibitory effect on coal comes from physical action, and only a small amount of chemical reaction or no chemical reaction occurs. reaction, so it is a physical inhibitor, and the physical inhibitor changes only the physical conditions of the coal and its environment, and cannot fundamentally solve the danger of coal spontaneous combustion. With the consumption and loss of the inhibitor, its inhibitory effect gradually Therefore, these inhibitors have disadvantages such as poor inhibitory effect and short inhibitory decay period.

[0007] Although the effect of the passivation tower is better, the operation is complicated, the investment is high, and the operating cost is high

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