Hydrogasification semi-coke pulping method

Abstract

The invention discloses a hydrogasification semi-coke pulping method, which includes a start-up stage and a stable operation stage. The advantage of the present invention is that, through pneumatic conveying, the semi-coke is transported to the Venturi mixer to be mixed with industrial fresh water, the semi-coke is fully wetted in advance, and then the wetted semi-coke is transported to the slurry mixing tank, and the semi-coke is Coke directly enters under the liquid level of the pulping mixing tank, and is stirred with the industrial fresh water in the pulping mixing tank to make pulp, ensuring that the semi-coke is mixed into the industrial fresh water to the greatest extent, improving the utilization rate of the semi-coke and improving the pulping effect; mixing After the compressed gas with semi-coke enters the semi-coke treatment chamber, it moves upwards through the through hole of the tray. The semi-coke contacts the water film on the tray, and the semi-coke is intercepted by the water film and falls back to the pulping process with the flowing industrial fresh water. In the mixing tank, pulping is carried out, and the utilization rate of semi-coke is increased to 99%, which avoids the waste of semi-coke caused by emptying, and reduces the cost of semi-coke pulping.

Description

Technical field:[0001]The invention relates to the field of coal chemical industry, in particular to a method for preparing hydrogenated semi-coke slurry.Background technique:[0002]Hydrogenation refers to the process in which carbon-containing compounds and hydrogen react at medium temperature (700-1000°C) and high pressure (5-10MPa) to produce methane-rich crude gas, high value-added aromatic oil products and high-calorific value semi-coke. . Semi-coke is also known as low-temperature coke, gray-black, with higher volatiles than coke, loose and porous texture, and good reaction performance. It is often used as a coal-water slurry gasification raw material in the coal chemical industry.[0003]At present, the process of semi-coke used in coal water slurry gasification is roughly as follows:figure 1 As shown, the semi-coke is ground by the semi-coke mill 19, and the semi-coke with a qualified particle size is ground into the semi-coke bin 17, and the semi-coke in the semi-coke bin 17 e...

AI Technical Summary

Problems solved by technology

Due to the loose and porous semi-coke texture, when it is mixed with water, it often floats on the water surface and is difficult to mix. The pulping effect is poor, and about 10% of the semi-coke by mass ratio cannot be successfully pulped. In order to ensure the pulping quality, this part is not used. The semi-coke mixed with water is generally drawn out of the pulping mixing tank 1 through the filter 28 and the induced draft fan 27. In this process, on the one hand, about 10% of the semi-coke is not effectively utilized, resulting in a waste of resources. The atmospheric environment has certain pollution; on the other hand, the filter 28 and the induced draft fan 27 are in contact with the semi-coke for a long time, and the filter 28 and the induced draft fan 27 are prone to blockage and damage, which affects the continuous and stable pulping process. Interruption will affect the progress of the coal-water slurry gasification process and reduce the efficiency of coal-water slurry gasification

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