Synthetic raw material gas deep fine desulfurization process and fine desulfurization device

A raw material gas and fine desulfurization technology, which is applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve problems such as irremovable, and achieve the effects of reducing cost and energy consumption, low reaction temperature, and large space velocity

Inactive Publication Date: 2015-03-25
SANLONG CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the document CN101224871B, a deep purification method of synthesis gas is proposed, which is characterized in that the operating temperature of the first process is normal temperature, and secondly, the catalyst selected is a hydrolysis catalyst, which can only convert COS, CS 2 Hydrolyzed to H 2 S is removed, and the c...

Method used

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  • Synthetic raw material gas deep fine desulfurization process and fine desulfurization device
  • Synthetic raw material gas deep fine desulfurization process and fine desulfurization device
  • Synthetic raw material gas deep fine desulfurization process and fine desulfurization device

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Embodiment 1

[0017] A device for deep fine desulfurization process of synthetic feed gas, such as figure 1 Shown: including iron oxide coarse desulfurizer 1, gas-gas heat exchanger 2, start-up heater 3, primary hydrogenation reactor 4, primary zinc oxide desulfurizer 5, secondary hydrogenation reactor 6, secondary Zinc oxide desulfurizer 7 and multi-functional fine desulfurizer 8, iron oxide coarse desulfurizer 1 are connected with gas-gas heat exchanger 2, start-up heater 3, primary hydrogenation reactor 4, and primary zinc oxide desulfurizer through pipelines 5. The secondary hydrogenation reactor 6 and the secondary zinc oxide desulfurizer 7 are connected, and the outlet of the secondary zinc oxide desulfurizer 7 is connected to another inlet at the top of the gas-gas heat exchanger 2 through a pipeline. Another outlet at the bottom of the gas-gas heat exchanger 2 is connected to the inlet of the multifunctional fine desulfurizer 8 through a pipeline.

[0018] According to the amount o...

Embodiment 2

[0020] Now take the desulfurization of coke oven gas as an example to describe the technical process in the present invention in detail. Coke oven gas is a gas source that contains a lot of organic sulfur and has a complex composition in the synthetic raw material gas. It also contains O 2 , CO, CO 2 Components, atmosphere effect is very obvious. The coke oven gas after rough desulfurization passes through iron oxide rough desulfurization reactor 1, and the H in the gas 2 The S content is reduced to 2 , RSH, RSR, C 4 h 4 S, etc.) hydrogenation into H 2 S, after leaving the primary hydrogenation reactor 4, coke oven gas enters the primary zinc oxide desulfurizer 5 equipped with zinc oxide desulfurizer to convert H 2 S is removed to ≤0.03ppm, and then enters the secondary hydrogenation reactor 6, allowing the remaining organic sulfur to undergo hydrogenation conversion reaction again, and the raw material gas after the reaction enters the secondary zinc oxide desulfurizer 7...

Embodiment 3

[0027] Taking water gas desulfurization as an example, the technical process in the present invention is described in detail. The water gas after crude desulfurization passes through iron oxide crude desulfurization reactor 1, and the H in the gas 2 The S content is reduced to 2 , RSH, RSR, C 4 h 4 S, etc.) hydrogenation into H2 S, after leaving the primary hydrogenation reactor 4, the water gas enters the primary zinc oxide desulfurizer 5 equipped with a zinc oxide desulfurizer to convert H 2 S is removed to ≤0.03ppm, and then enters the secondary hydrogenation reactor 6, allowing the remaining organic sulfur to undergo hydrogenation conversion reaction again, and the raw material gas after the reaction enters the secondary zinc oxide desulfurizer 7, and the organic sulfur and H 2 S off to trace. After the secondary hydrogenation reaction and secondary zinc oxide desulfurization, the water gas passes through the gas-gas heat exchanger 2 for heat exchange, and after the tem...

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Abstract

The invention discloses a deep desulfurization method for preparing a synthetic raw material gas by taking a coal-based natural gas, a petroleum refining gas, a coke oven gas, a steel mill converter gas and the like as raw materials. The method comprises the step of enabling the raw material gas which is treated by rough desulfurization and contains hundreds of parts per million (ppm) of H2S and hundreds of ppm of organic sulfur (including COS, CS2, sulfur alcohol, sulfur ether, thiophene and the like) to pass through a plurality of stages of titanium-based molybdenum-cobalt catalysts, a plurality of stages of zinc oxide desulfurizing agents and a stage of multifunctional fine desulfurizing agent to enable the total sulfur to be less than or equal to 0.01ppm. Compared with the existing desulfurization accuracy (0.1ppm), the desulfurization accuracy of the deep desulfurization method enables the degree of purification to be increased by one order of magnitude and enables the service life of a methyl alcohol catalyst to be doubled. The invention also discloses a medium-temperature fine desulfurization device used by the synthetic raw material gas deep fine desulfurization method. For the industrial community, after the method and the device are used, the starting and stopping times of the device can be reduced, the raw material and the power consumption are reduced, the yield of the device is increased, and an effective measure capable of saving energy, reducing emission and increasing yield can be provided.

Description

technical field [0001] The invention relates to gas purification in chemical engineering, belongs to the field of "energy saving and emission reduction", and specifically relates to a deep fine desulfurization process of synthetic raw material gas and a device thereof. Background technique [0002] In the existing technology, coal gas, coke oven gas, petroleum refinery gas, steel plant converter gas and natural gas are used as raw materials to produce synthetic raw material gas. Large and medium-sized methanol plants, synthetic ammonia plants, and synthetic oil plants have refined desulfurization process. Large-scale plants use low-temperature methanol washing and NHD method, and medium-sized plants use dry fine desulfurization (including normal and medium temperature fine desulfurization). These methods make the total sulfur in the synthetic feed gas less than or equal to 0.1ppm, which can ensure that the life of the catalyst for synthesizing methanol is 2-3 years, the lif...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/48
Inventor 沈炳龙张文效姚润生沈雁鸣李小军沈雁军邢春良刘丽萍王忠英沈雁来
Owner SANLONG CATALYST
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