Method for preparing synthesis gas from phosphogypsum

A technology for phosphogypsum and synthesis gas is applied in the field of phosphorus chemical waste residue recycling, which can solve the problems of high energy consumption, complex method and process, and achieve the effects of high output, easy availability of raw materials and easy process.

Inactive Publication Date: 2016-11-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are a wide range of raw materials for preparing synthesis gas, which can be produced by the vaporization of solid fuels such as coal or coke, and can also be produced from l...

Method used

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  • Method for preparing synthesis gas from phosphogypsum
  • Method for preparing synthesis gas from phosphogypsum
  • Method for preparing synthesis gas from phosphogypsum

Examples

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Embodiment 1

[0024] The method for preparing synthesis gas by using phosphogypsum described in this embodiment has the following specific steps: keeping the phosphogypsum and lignite at 105° C. for 2 hours, drying to remove free water, then grinding and sieving through 80 meshes, and sieving the phosphorus Gypsum and lignite in a ratio of 0.01 by mass, weigh 0.01 g of dried phosphogypsum powder and 1 g of lignite powder and mix them evenly, put them into a tube furnace, and after the tube furnace is deoxidized with nitrogen, the tube furnace is cooled from room temperature to room temperature. The temperature was raised to 950°C and kept for 1.5 hours. The phosphogypsum and lignite reacted fully, and gas was generated during the reaction. After the gas was cooled, it was dried on silica gel and then passed into the gas chromatograph to measure the concentration of various gases. It can be seen from the gas chromatograph , the amount of carbon monoxide and hydrogen in the generated gas slowl...

Embodiment 2

[0029] The method for preparing synthesis gas by using phosphogypsum described in this embodiment has the following specific steps: keeping the phosphogypsum and lignite at 100° C. for 3 hours, drying to remove free water, then grinding and sieving through 100 meshes, and the phosphorus Gypsum and lignite in a ratio of 0.4 by mass, weigh 0.4g of dried phosphogypsum powder and 1g of lignite powder and mix them evenly, put them in a tube furnace, and after the tube furnace is deoxidized with argon, the tube furnace The temperature was raised from room temperature to 875°C and kept for 2 hours. The phosphogypsum and lignite fully reacted, and gas was generated during the reaction process. After the gas was cooled, it was dried on silica gel and then passed into gas chromatography to measure the concentration of various gases. It can be seen that the amount of carbon monoxide and hydrogen in the generated gas slowly increases, and then gradually decreases as the reaction proceeds u...

Embodiment 3

[0038]The method for preparing synthesis gas by using phosphogypsum described in this embodiment has the following specific steps: keeping the phosphogypsum and lignite at 120° C. for 2 hours, drying to remove free water, then grinding and sieving through a 60-mesh; Gypsum and lignite in a mass ratio of 0.75, weigh 0.75g of dried phosphogypsum powder and 1g of lignite powder and mix them evenly, put them into a tube furnace, and after the tube furnace is deoxidized with helium gas, the tube furnace is removed from the The room temperature was raised to 890°C, and the temperature was kept for 1.8 hours. The phosphogypsum and lignite fully reacted, and gas was generated during the reaction process. After the gas was cooled, it was dried on silica gel and then passed into the gas chromatograph to detect the concentration of various gases. From the gas chromatograph, it can be seen The amount of carbon monoxide and hydrogen in the generated gas gradually increased, and then gradual...

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Abstract

The invention discloses a method for preparing synthesis gas from phosphogypsum and belongs to the field of resource utilization of phosphogypsum. Lignite and phosphogypsum are taken as raw materials, after oxygen is removed from inert gas, calcination is performed, and the synthesis gas is prepared. The preparation process is simple and easy to implement, raw materials are industrial solid waste phosphogypsum and inferior lignite, the produced synthesis gas can be widely used for chemical feed gas, CaS can be obtained, and harmless, resourceful and high-value utilization of phosphogypsum is realized.

Description

technical field [0001] The invention relates to a method for preparing synthesis gas by utilizing phosphogypsum, and belongs to the field of phosphorus chemical waste residue recycling. Background technique [0002] Phosphogypsum is a by-product of the wet production of phosphoric acid, and its main composition is gypsum (CaSO4). 4 ·2H 2 O). At present, the disposal of phosphogypsum at home and abroad basically adopts the method of waste accumulation or direct discharge into the sea, which causes serious waste of resources and brings many potential environmental hazards. Although some improvements have been made in recent years, the effect is still unsatisfactory. The comprehensive utilization of phosphogypsum has become a major problem to be solved urgently by phosphorus chemical enterprises and environmental protection departments. The resource utilization methods of phosphogypsum at home and abroad are mainly used for making bricks, boards and other building materials,...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10B57/06C01B17/44
CPCC01B17/44C10B53/04C10B57/06
Inventor 马丽萍杨杰连艳刘红盼唐剑骁朱斌马贵鹏郑大龙王荣谋李健铎
Owner KUNMING UNIV OF SCI & TECH
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