Hydrogasification semi-coke pulping apparatus and stable operation method thereof

Abstract

The invention discloses a hydrogasification semi-coke pulping apparatus and a stable operation method thereof. The apparatus comprises a pulping stirring tank, a pneumatic conveying device, a venturimixer and a pulp blending tank. The stable operation method comprises that semi-coke is pneumatically conveyed into a venturi mixer, and is mixed with industrial fresh water conveyed to the venturi mixer to obtain a pre-pulp. According to the present invention, semi-coke is conveyed to the venturi mixer through pneumatic conveying, and is mixed with the industrial fresh water, the semi-coke is fully wetted in advance, the wet semi-coke is conveyed to the pulping stirring tank, and the semi-coke directly enters the liquid surface of the pulping stirring tank, and is subjected to stirring pulping with the industrial fresh water in the pulping stirring tank, such that the semi-coke is mixed into the industrial fresh water to the maximal degree so as to improve the utilization rate of the semi-coke and improve the pulping effect.

Description

Technical field: [0001] The invention relates to the field of coal chemical industry, in particular to a hydrogasification semi-coke pulping device and a stable operation method thereof. Background technique: [0002] Hydrogasification refers to the process in which carbon-containing compounds react with hydrogen at medium temperature (700-1000°C) and high pressure (5-10MPa) to generate crude gas rich in methane, high value-added aromatic oil and semi-coke with high calorific value . Semi-coke, also known as low-temperature coke, is gray-black, with higher volatiles than coke, loose and porous texture, and good reactivity. It is often used as a raw material for coal-water slurry gasification in the field of coal chemical industry. [0003] At present, the process of using semi-coke for 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...

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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