Synthesis gas from petroleum coke
阅读：32发布：2022-06-28
专利汇可以提供Synthesis gas from petroleum coke专利检索，专利查询，专利分析的服务。并且Production of synthesis gas (mixtures of hydrogen and carbon monoxide) in a refractory lined reaction zone of a partial oxidation free-flow synthesis gas generator by feeding to said reaction zone a stream of particulate petroleum coke containing heavy metal constituents dispersed in H2O. Attack of said refractory lining by the metals and metal compounds present in said petroleum coke, or their reaction products, is substantially prevented by controlling the feedstreams to the reaction so that entrained in the product gas leaving the reaction zone is an amount of unconverted petroleum coke containing unreacted about 8 weight percent or more of the quantity of carbon originally present in the petroleum coke feedstream.，下面是Synthesis gas from petroleum coke专利的具体信息内容。
2. The process of claim 1 with the added steps of preheating said stream of feed slurry to a temperature in the range of 100* to 400* F. and preheating said stream of oxygen rich gas to a temperature in the range of 100* to 800* F. and wherein the entrained unconverted particulate petroleum coke in the product gas stream leaving the reaction zone is in an amount so that about 8 to 20 weight percent of the carbon originally present in the petroleum coke feedstream is retained unreacted by said entrained unconverted petroleum coke in the product gas stream, and wherein about 17 to 60 weight percent of the heavy metal constituents in the petroleum coke feedstream or their oxidation products are retained by the unconverted particulate petroleum coke entraIned in said product gas stream, and wherein said heavy metal constituents comprise heavy metals and their oxides, sulfides and salts, and said heavy metals are selected from the group consisting of vanadium, nickel, iron, chromium and molybdenum.
2. reacting the feed mixture of (1) in said reaction zone at an autogenous temperature in the range of from about 1,800* to 3, 500* F. and a pressure in the range of about atmospheric to 3, 000 p.s.i.g. to produce a hot effluent gas stream comprising principally hydrogen and carbon monoxide and containing entrained a controlled amount of unconverted particulate petroleum coke;
3. The process of claim 1 wherein said petroleum coke-water slurry is atomized and mixed with said oxygen-rich gas by passing said stream of slurry at a discharge velocity of about 5 to 50 feet per second through the inner conduit of an annulus-type burner, passing said stream of oxygen-rich gas at a discharge velocity in the range of about 200 feet per second to sonic velocity through the annular passage of said burner, and contacting said slurry stream with said oxygen-rich gas stream in said reaction zone where combustion of said atomized mixture takes place.
3. cooling the hot effluent gas stream from (2) and recovering the unconverted particulate petroleum coke in water as a slurry;
4. The process of claim 1 wherein said petroleum coke-H2O stream is atomized by passing said stream of oxygen-rich gas at a discharge velocity in the range of about 200 feet per second to sonic velocity through the inner conduit of an annulus-type burner in said reaction zone and contacting said oxygen-rich gas stream with a stream of said petroleum coke-H2O stream passing at a discharge velocity of about 5 to 50 feet per second through the annular passage of said burner.
4. determining the quantity of unconverted petroleum coke in the effluent gas stream of (2) for a given period of time;
5. responsive to the determination in (4), controlling the amount of said unconverted particulate petroleum coke in the hot effluent gas stream leaving (2) by regulating the ratio of free oxygen to carbon in the feed mixture of (1) in the range of 0.7-1.5 atoms of oxygen per atom of carbon and the ratio of H2O to carbon in the feed mixture of (1) in the range of 0.2-3.0 parts by weight of H2O per part by weigh of carbon so as to produce said hot effluent gas stream leaving (2) comprising in mole percent dry basis: H2 25 to 45, CO 20 to 50, CO2 5 to 35, CH4 0.06 to 8.0, (COS+H2S) 0.1 to 2.0, and said entrained unconverted petroleum coke containing about 8 to 20 weight percent of the quantity of carbon originally present in the petroleum coke feed in (1), so that said entrained unconverted particulate petroleum coke in the product gas retains from about 17-60 weight percent of the heavy metal constituents as contained in the petroleum coke feed of (1) or the oxidation products of said heavy metal constituents as produced in said reaction zone so that damage to said refractory lining is prevented.
5. The process of claim 1 wherein said particulate petroleum coke is dispersed in water to form the pumpable slurry less than 10 weight percent of a gelling agent.
6. The process of claim 1 with the added steps of quenching the hot product gas stream from the reaction zone by discharging it directly into a quench zone, thereby simultaneously cooling it with quench water to a temperature in the range of about 300* to 700* F. and recovering most of said unconverted particulate petroleum coke as an unconverted particulate petroleum coke-water slurry, and scrubbing the cooled product gas stream from the quench zone with water in a scrubbing zone to recover any remaining unconverted particulate petroleum coke as an unconverted petroleum coke-water slurry.
7. The process of claim 6 with the added step of dewatering at least a portion of said unconverted particulate petroleum coke-water slurry in a dewatering zone by sedimentation or filtration, recovering vanadium and nickel from said dewatered petroleum coke in a metals recovery zone, slurrying the metals-free unconverted petroleum coke from the metals recovery zone with water from the dewatering zone, and recycling said slurry as a portion of the feed to the reaction zone of said synthesis gas generator.
8. In a partial oxidation process for producing synthesis gas in a high temperature refractory lined reaction zone of a catalytic, free-flow, unpacked synthesis gas generator, the improvement for extending the life of said high temperature refractory lining while reacting in said reaction zone as fuel a H2O dispersion of petroleum coke containing heavy metal constituents which comprises:
9. The process of claim 8 with the additional steps of cooling the hot effluent gas steam from (2) in a cooling zone and recovering said unconverted particulate petroleum coke from said effluent gas by contacting it with water forming an unconverted particulate petroleum coke-water slurry; dewatering said unconverted particulate petroleum coke-water slurry in a dewatering zone producing clear water and unconverted particulate petroleum coke; recovering heavy metals from said dewatered unconverted particulate petroleum coke in a metals recovery zone, leaving metals-free unconverted particulate petroleum coke; forming a slurry of metals-free unconverted particulate petroleum coke with the water from said dewatering zone and recycling said slurry as a portion of the feed to the reaction zone of said synthesis gas generator.
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