Pulverized coal gasification device and process for producing high heating value coal gas with low carbon residue content

A pulverized coal gasification device for producing high heating value coal gas with low carbon residue content, wherein, comprising a U-shaped coal gas generation furnace and a coal gas-semicoke separating device, wherein the U-shaped coal gas generation furnace comprises two section structures namely a high-temperature section and a low-temperature section which are arranged in a U-shaped manner;

• the high-temperature section and the low-temperature section share an ash hopper;
• the high-temperature section is a downward entrained-flow bed, and the low-temperature section is an upward entrained-flow bed;
• and an inlet of the coal gas-semicoke separating device is connected to an outlet of the low-temperature section, a solid outlet of the coal gas separating device is connected to an inlet of the high-temperature section, and a gas outlet of the coal gas separating device is connected to a coal gas waste heat utilizing and purifying system;
• wherein the low-temperature section comprises a low-temperature section furnace body, a position where the low-temperature section furnace body is connected to the high-temperature section is a low-temperature section throat, an oxygen\air nozzle is arranged at a lower end of the low-temperature section throat, and low-temperature section pulverized coal nozzles are arranged at an upper end of the low-temperature section throat.