Three-phase multi-raw-material pressurized coal gasification device and process thereof

Abstract

The invention discloses a three-phase multi-raw-material pressurized coal gasification device and a process thereof, which comprises a coal slurry preparing and conveying mechanism, a dry coal powder preparing and conveying mechanism and a pressurized gasification mechanism, wherein the coal slurry preparing and conveying mechanism consists of a coal mill, a coal slurry groove, a high-pressure coal slurry pump, and a high-pressure coal slurry pipeline; the dry coal powder preparing and conveying mechanism consists of a dry powder preparer, a dry powder storage groove, a screw conveyor, a coal powder pipeline and a nozzle feeding bin; and the pressurized gasification mechanism consists of a combustion chamber and a quench chamber. The high-pressure coal slurry pipeline and the nozzle feeding bin are respectively connected with a mixing nozzle which is arranged on the combustion chamber and is communicated with the interior of the combustion chamber. By the combination of multiple phases and multiple raw materials, the pressurized coal gasification device increases the content of carbon in the reactants and increases reacting efficiency and production intensity, and the contents of carbon monoxide and hydrogen in the active ingredients are increased from 80% to 84%-88%, thereby improving the comprehensive utilization ratio of the coal resource and reducing the discharge amount of carbon dioxide.

Description

technical field [0001] The invention relates to a wet slurry entrained bed pressurized coal gasification device, more specifically, a three-phase multi-raw material pressurized coal gasification device and its technology. Background technique [0002] Coal gasification is the use of gasification agents (such as O 2 、H 2 O) react with coal to generate clean synthesis gas (with CO, H 2 and CO 2 It is an important method for chemical processing of coal, and it is also the key to realize the clean utilization of coal. Its main reactions are as follows: [0003] C+O 2 →CO 2 ; [0004] C+CO 2 →2CO; [0005] C+H 2 O→CO+H 2 ; [0006] CO+H 2 O→H 2 +CO 2 . [0007] Coal gasification technology, especially wet slurry pressurized gasification technology, has shown good economic and social benefits. It is currently a relatively advanced coal utilization technology and the leader and key of clean coal technology. The core of this technology is to inject oxygen and coal-w...

AI Technical Summary

Problems solved by technology

But, also there is weak point: owing to adopting wet feeding (coal and water are ground and made the water coal slurry of about 60% concentration), the improvement of the concentration of coal water slurry is limited (at present substantially about 60%), reaction The carbon content in the material is low, the water content is high, the oxygen consumption is high, the heat utilization rate is low, and 15% of the heat is not used, the carbon conversion rate is low (actually 93%-96%), and the effective gas composition is low (carbon monoxide and hydrogen The sum of content is about 80%) and other shortcomings

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