摘要:
A quenching chamber of an entrained-flow gasifier that gasifies fuels at temperatures of up to 1,800° C. and pressures of up to 10 MPa, wherein an annular chamber through which cooling water flows is formed between the pressure-bearing tank and the inner jacket. The overflow water is discharged from the annular chamber (skirt water) into the quenching chamber via the sleeve of a quenching lance, wherein blocking by the spray cone of the spray nozzle is prevented. The cooling water from the annular chamber is used in addition to the quenching water from the spray nozzle to cool and clean the raw gas in the quenching chamber.
摘要:
A liquid-cooled cooling screen for an entrained-flow gasifier for gasification of fuels in dust or liquid form using a gasifier agent containing free oxygen, at pressures between atmospheric pressure and 8 MPa and gasification temperatures between 1200 and 1900° C. The liquid-cooled cooling screen of which the cooling pipes in the central cylindrical section have thinner walls than the cooling pipes in the lower and upper conical sections. A cooling screen design has sufficient strength under high pressure difference over the cooling screen wall, a pipe wall thickness which ensures reliable operation of the cooling screen and high heat throughput, and pressure equalization between the cooling screen gap and the reaction chamber under all operating circumstances.
摘要:
Devices for a three-stage scrubbing system for treatment of hot crude gases and liquid slag by an entrained flow gasification. Crude gas and slag are conducted downward into a water bath in a central tube. The upper part of the central tube consists of a double-threaded tube screen welded in a gas-tight manner, in which water is injected directly as the first scrubbing and cooling stage in the interior thereof. In the water bath, a bubble column is formed, which simultaneously constitutes the second scrubbing and cooling stage. Surface bodies arranged in three layers increase the scrubbing effect. After leaving the bubble column, the crude gas is again sprayed with water in a cavity, wherein one or more nozzle rings are disposed. This forms the third scrubbing stage. The crude gas then leaves the quenching and scrubbing apparatus in steam-saturated form at 200-220° C. and is sent to further treatment.
摘要:
A quenching chamber of an entrained-flow gasifier that gasifies fuels at temperatures of up to 1,800° C. and pressures of up to 10 MPa, wherein an annular chamber through which cooling water flows is formed between the pressure-bearing tank and the inner jacket. The overflow water is discharged from the annular chamber (skirt water) into the quenching chamber via the sleeve of a quenching lance, wherein blocking by the spray cone of the spray nozzle is prevented. The cooling water from the annular chamber is used in addition to the quenching water from the spray nozzle to cool and clean the raw gas in the quenching chamber.
摘要:
A compact burner for the pressurized gasification of pulverized fuel dust for producing synthesis gas, wherein a plurality of concentric media channels transition into a conical burner tip. The burner tip provides a reduced contact surface on the reaction chamber side. The nozzle components of the burner tip are produced by selective laser melting, which permits a design for cooling by supplied media, such as fuel gas, flushing gas, or oxidation. A sliding guide having an intermediate seal is arranged between the nozzle components of two media channels to equalize temperature-driven linear extensions. The compact burner makes the expense for liquid cooling unnecessary.
摘要:
A raw gas washing system with a high degree of deposition of dust in an entrained flow gasification device for the conversion of ash-containing fuels by a gasification device containing free oxygen into a raw gas with a high proportion of hydrogen, in which the fuel is converted in a gasification reactor at temperatures of between 1200 and 1900° C. and method pressures of up to 10 MPa into raw gas and liquid slag. A quenching space designed as a free-space quench contains an additional washing ring which causes a direct-current washing of the quenched raw gas, reducing the particle loading of the raw gas in the raw gas output, thereby reducing subsequent raw gas purification steps.
摘要:
A three-stage quenching and scrubbing system for treatment of hot crude gases and liquid slag after an entrained flow gasification. In the first primary stage, cooling and scrubbing water is injected such that slag can no longer adhere to the wall of the central tube and the conversion reaction of the carbon monoxide with water vapor to give hydrogen can proceed to close to the equilibrium. A secondary quenching and scrubbing stage takes the form of a bubble column, and further cooling and the deposition of coarse dust and slag are effected in a water bath. The rest of the treatment is through intensive spraying in a tertiary quenching and scrubbing the gas stage, nozzle rings for deposition of fine slag and partly of fine dust. All three quenching and scrubbing stages enable cooling of the crude gas down to the water vapor dew point determined by the plant pressure.