A gasification co-generation process of coal powder in a Y-type entrained flow bed, comprising: spraying coal water slurry or coal powder, gasification agent and water vapor into a gasification furnace through a top nozzle and a plurality of side nozzles for performing combustion and gasification with a residence time of 10 s or more; chilling the resulting slag with water, and subjecting the chilled slag to a dry method slagging to obtain gasification slag used as cement clinker; discharging the produced crude syngas carrying fine ash from the Y-type entrained flow bed to perform ash-slag separation.

A gasification co-generation process of coal powder in a Y-type entrained flow bed, comprising: spraying coal water slurry or coal powder, gasification agent and water vapor into a gasification furnace through a top nozzle and a plurality of side nozzles for performing combustion and gasification with a residence time of 10 s or more; chilling the resulting slag with water, and subjecting the chilled slag to a dry method slagging to obtain gasification slag used as cement clinker; discharging the produced crude syngas carrying fine ash from the Y-type entrained flow bed to perform ash-slag separation.

A pulverized coal gasification device and process for producing high heating value coal gas with low carbon residue content includes a U-shaped coal gas generation furnace and a coal gas-semicoke separating device, and the U-shaped coal gas generation furnace consists of two section structures including high-temperature and low-temperature sections 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 separating device is connected to the 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. The coal utilization rate can be greatly increased.

This invention involves with a gasification system, which includes a gasifier, which gasifier comprises a gasification chamber for producing syngas from coal slurry and a quench chamber for cooling the syngas from the gasification chamber. The mentioned gasification system also comprises preheater located in the quench chamber for utilizing heat in the quench chamber to preheat the coal slurry before the coal slurry enters the gasification chamber. Wherein, the preheater comprises a pipe device defining a passage for the coal slurry to pass through, the passage in communication with the gasification chamber and upstream of the gasification chamber in a flow direction of the coal slurry. This invention also involves with a preheater used in the mentioned gasification system and the gasification method of the mentioned gasification device.

A char recycling system capable of easily determining whether or not a char exhausting pipe is blocked by char. The char recycling system comprises: a stand pipe (31) forming a vertically-downwards flowpath (33) through which char is conveyed; and a differential pressure gauge (41) that measures the pressure difference between the pressure in a downstream area (45) in the vertically-downwards flowpath (33) and the pressure in an upstream area (46) in the vertically-downwards flowpath (33). The pressure difference fluctuates when char accumulates between the downstream area (45) and the upstream area (46) in the vertically-downwards flowpath (33). As a result, this kind of char recovery system is capable of easily determining whether or not the vertically-downwards flowpath (33) is blocked by char, on the basis of the measured pressure difference.

A gasifier may include a chamber wall defining a gasification chamber configured to allow gasification of feedstock material. The gasifier may also include an ash grate disposed in the gasification chamber. The gasifier may further include a rotary crusher disposed in the gasification chamber above the ash grate. The rotary crusher may include at least one crushing element. The rotary crusher may be configured to break apart, between the at least one crushing element and an opposing surface, the feedstock material responsive to rotation of the rotary crusher.

The purpose of the present invention is to provide a furnace wall in which a throat section with a smaller channel diameter than other regions can be formed using all peripheral wall tubes. Provided is a furnace wall comprising: a plurality of peripheral wall tubes (142), which are disposed so as to form a cylindrical shape when aligned in one direction and through the interior of which cooling water flows; and fins (140) that connect neighboring peripheral wall tubes (142) in an airtight manner. In a throat section in which the diameter of a horizontal cross-section of the cylindrical shape is reduced in comparison to other regions, the peripheral wall tubes (142) are disposed so as to be in mutual contact and the fins (140) are disposed on the inner circumferential sides of the cylindrical shapes.

A carbon-containing material gasification system includes: a gasifier that includes a combustion stage and a gasification stage, and generates generated gas; char providing means that separates char from the generated gas, and provides the combustion stage with the char, the combustion stage including carbon-containing material combustion means and char combustion means; and distributing ratio setting means that sets, according to a ratio of distributing material defined in Expression [1], a ratio of distributing oxidizing agent defined in Expression [2] to be smaller as the ratio of distributing material increases.

(ratio of distributing material)=(providing amount of the carbon-containing material for gasification stage)/(total providing amount of the carbon-containing material to gasifier)[1]

(ratio of distributing oxidizing agent)=(providing amount of the oxidizing agent to oxidize carbon-containing material for the combustion stage)/(total providing amount of the oxidizing agent to the combustion stage)[2]

A slag crusher includes a screen provided so as to intersect a falling direction of a slag and having openings; at least two spreaders disposed opposite from one another on the screen; and a spreader moving unit configured to support the spreaders and move the spreaders in a direction vertical to the opposing faces of the spreaders. Each spreader includes projections and a lower projection so as to face the other spreader. In a state in which the lower projection is closest to the other spreader, the lower projection does not come into surface contact with the opposed lower projection, and a distance between the opposing lower projections is smaller than an opening dimension of the openings of the screen across a width direction of the spreaders.

This slag discharge system (1) includes: a slag hopper (5) of a coal gasifier (2); a slag discharge line (7) that discharges a mixture of slag and slag water (W); a slag separation device (10) that separates the slag from the mixture of slag and slag water (W); a circulation pump (24) that forms a water flow from the slag hopper (5) to the slag separation device (10) in the slag discharge line (7); a lock hopper (14) that stores slag which has been separated at the slag separation device (10) and discharges the same out of the coal gasifier (2) system: a slag discharge valve (15) that is provided on a lower outlet of the lock hopper (14); and a slag water return flow line (20) for returning the slag water (W) which has been separated at the slag separation device (10) to the slag hopper.