Method and device for pyrolysis of carbon and hydrogen-containing powder in forced mixing secondary pyrolysis pre-reaction zone

Abstract

The invention relates to a method and a device for pyrolysis of carbon and hydrogen-containing powder in a forced mixing secondary pyrolysis pre-reaction zone, the method and the device are suitable for the processing of pulverized coal, forced pre-mixing of solid R10PSX obtained by separation of primary pyrolysis reaction product R10P and second solid heat carrier R20KS is completed in the forcedmixing secondary pyrolysis pre-reaction zone PR20, and a highly-mixed mixed solid phase raw material is provided for a secondary pyrolysis reaction process.

Description

technical field [0001] The present invention relates to a hydrocarbon powder pyrolysis method and equipment in a forced-mixing secondary pyrolysis pre-reaction zone, which is suitable for the processing of pulverized coal and separates the solid R10PSX obtained from the primary pyrolysis reaction product R10P and the second solid heat carrier R20KS. The forced pre-mixing of the two is completed in the forced-mixing secondary pyrolysis pre-reaction zone PR20 to provide mixed solid-phase raw materials with a high degree of mixing for the secondary pyrolysis reaction process. Background technique [0002] The hydrocarbon powder in the present invention refers to the solid powder containing carbon and hydrogen that can generate oil-containing steam during the pyrolysis reaction process in the present invention, such as low-modified coal powder and oil sand with high volatile content , oil shale, and coal are directly liquefied to produce oil at the bottom of the vacuum fractiona...

AI Technical Summary

Problems solved by technology

[0011] So far, many industrial countries or large commercial companies have carried out research and development on pulverized coal pyrolysis technology, and have proposed a variety of processes such as the German L-R process, namely the Lurgi-Ruer process, the American Toscoal process, and the American COED process, but there is no large-scale one. Success stories of commercial installations

[0012] From the perspective of engineering technology, the above typical pulverized coal pyrolysis technology cannot completely or substantially eliminate the following defects. The root cause is that there is no reasonable integration of technical means to achieve different goals:

[0013] ①The thermodynamic mechanism of the pyrolysis reaction is not clear. The main operating temperature of a single pyrolysis reaction process is located in a narrow temperature range exceeding 500°C. The ability to selectively control the reaction depth of parallel reactions and series reactions in the coal pyrolysis process leads to low tar yield and low hydrogen content;

[0014] ② The heat supply method, fluid mechanics characteristics and equipment structure of the industrial process of pyrolysis reaction are unreasonable, which leads to too short operation cycle and poor reliability, and it is difficult to realize large-scale operation, resulting in large investment in unit processing volume;

[0015] ③ The integration of the heat energy recovery system is too low, resulting in low thermal efficiency of the system;

[0016] ④ The integration of pyrolysis steps is too low, there are many operation steps, and the system is complex and reliable

[0031] ③The processing capacity is highly flexible;

[0044] The layout position of the secondary pyrolysis mixed raw material accumulation and falling distributor QSSE can be in the dilute bed or at the junction of the dilute bed and the dense bed, or even at the shallow level of the dense bed, but it must be ensured that solid Heat transfer time to complete the expected secondary pyrolysis reaction will obviously increase the volume of the settler; this location is generally not recommended to be a position inside the dense bed because of the mixing space, thermal The solution time is too short to ensure the secondary pyrolysis effect; at the same time, the space and time for contacting the stripping gas are too short to ensure the effect of gas stripping to remove hydrocarbon oil vapor;

[0062] Method of the present invention, no report

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