Three-phase multi-material three-dimensional pressurized clash coal gasification device and process thereof

Abstract

The invention discloses a three-phase multi-material three-dimensional pressurized clash 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-rod conveyer, a coal powder pipeline and a nozzle feeding bin; and the pressurized gasification mechanism comprises a combustion chamber and a quench chamber. A water-coal slurry nozzle and a dry coal powder nozzle are arranged on the combustion chamber and are respectively communicated with the interior of the combustion chamber; and the dry coal powder nozzle and the water-coal slurry nozzle are also connected with a high-pressure gas pipeline. The dry coal powder nozzle arranged at the top reduces the damages of the returned air current mixture to the vault and the blind-head firebricks, thereby improving the utilization rate of the equipment. The injection mode of the dry powder and the carbon dioxide at the top increases the content of carbon in the reactants, and the active ingredients in the coal gas are increased to 85% above, thereby improving the utilization ratio of the coal resource and reducing the discharge amount of carbon dioxide.

Description

technical field [0001] The present invention relates to a wet slurry entrained bed pressurized coal gasification device, more specifically, a three-phase multi-material stereo pressurized collision 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 pressurized gasification technology, has shown good economic and social benefits. The gasification technology of "multi-nozzle opposed coal-water slurry or pulverized coal gasifier and its application" (patent number ZL98110616. 1) It is a ...

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Problems solved by technology

[0009] 1. In practical application, due to the use of wet feed (grinding coal and water to make a coal-water slurry with a concentration of about 60%), the concentration of the coal-water slurry is limited (currently about 60%), and the reactants The carbon content is low, the water content is high, the oxygen consumption is high, and the heat utilization rate is low;

[0010] 2. Because the materials ejected from the four nozzles form an impact flow in the combustion chamber, a large amount of high-temperature and high-pressure back-mixed airflow will cause damage to the vault and blind head of the combustion chamber, greatly shortening the service life of the refractory bricks on the vault and blind end of the combustion chamber , in practical application, the operation period of the gasifier with this technology is generally only 20-30 days, and its vault bricks, blind heads, and nozzles are easily damaged by the heat of the impinging flow

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