A combined process of coal dry distillation and coal catalytic cracking

A technology of catalytic cracking and combined process, which is applied in special forms of dry distillation, direct heating dry distillation, petroleum industry, etc. It can solve the problems of processing and utilization, low calorific value of baked gas, and restrictions on the use of semi-coke products, and achieve the effect of promoting the effect

Active Publication Date: 2018-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problems existing in the internal heating vertical carbonization furnace are: ① In order to ensure that the gas heat carrier passes through the coal smoothly, only lump coal with a thickness of 20-80mm can be used as raw material; The value is low, which makes it difficult to meet the requirements of industry and civil use, which has a huge impact on subsequent further processing and utilization; ③A large amount of coke quenching high-temperature wastewater is produced by using water-sealed cooling coke discharge method, and the semi-coke product has a high moisture content, which limits the semi-coke product. use, and drying semi-coke will waste a lot of gas; ④The coal material needs to stay for 4-7 hours from the top of the furnace into the carbonization chamber to the coke discharge, the output of a single furnace is low, and the unit investment per ton of coke is high
Therefore, the problem of CO in the regenerated flue gas has not been properly resolved

Method used

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  • A combined process of coal dry distillation and coal catalytic cracking
  • A combined process of coal dry distillation and coal catalytic cracking
  • A combined process of coal dry distillation and coal catalytic cracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The catalytic cracking reaction is carried out on a small riser catalytic cracking unit. The catalytic cracking catalyst used in the examples is an industrial equilibrium catalyst (see Table 1 for properties of the fresh catalyst). Hydrogenated residual oil (>350°C) is used as catalytic cracking raw material, the test conditions are: reaction temperature 520°C, solvent-oil ratio 6:1, space velocity 10h -1 . The operating data and flue gas composition of the regenerator are shown in Table 2. Lignite A from a certain area in northern Shaanxi was selected, and its industrial analysis is shown in Table 3. After the raw coal is crushed and screened, the pulverized coal <6mm is added to the fluidized bed carbonization reactor, and the mixture of primary flue gas and secondary flue gas and air are burned in the CO incinerator, and the temperature of the flue gas at the outlet of the incinerator is controlled At 800°C, add water to the heat carrier, the volume of water conve...

Embodiment 2

[0037] The reaction is carried out on a small riser type catalytic cracking unit. The catalytic cracking catalyst used in the examples is an industrial equilibrium catalyst (see Table 1 for properties of the fresh catalyst). Hydrogenated residual oil (>350°C) is used as catalytic cracking raw material, the test conditions are: reaction temperature 520°C, solvent-oil ratio 6:1, space velocity 10h -1 . The operating data and flue gas composition of the regenerator are shown in Table 5. Lignite A from a certain area in northern Shaanxi was selected, and its industrial analysis is shown in Table 2. After the raw coal is crushed and screened, the pulverized coal <6mm is added to the fluidized bed dry distillation reactor, and the mixture of primary flue gas and secondary flue gas is burned in the high-temperature flue, and the temperature of the flue gas at the outlet of the high-temperature flue is controlled. At 1000°C, add water to the heat carrier, the volume of water conver...

Embodiment 3

[0049] Pass through cyclohexanol vapor in the heat carrier that feeds water vapor, the volume content of cyclohexanol vapor in heat carrier is 2%, all the other are the same as embodiment 1, and product distribution is shown in Table 9.

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Abstract

The invention discloses a c carbonization and coal catalytic cracking combined process. catalyst first regenerator flue gas and catalyst second regenerator flue gas are mixed and then burn together with burning supporting gas, the temperature of burned flue gas is controlled at 600-1200DEG C, preferably 800-1000DEG C, a proper amount of water is injected into the burned flue gas to serve as a heat carrier to perform low temperature carbonization on a carbonization raw material, thus generating coal gas, semicoke and coal tar, and the volume content of water vapor converted from the injected water in the heat carrier is 1-50v%. The method can improve the yield of coal tar.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, and in particular relates to a combined process of coal dry distillation and catalytic cracking. Background technique [0002] The low-temperature dry distillation of coal refers to the low-temperature pyrolysis of lignite or young bituminous coal heated to 500-750°C in the absence of air to generate semi-coke, tar and gas. The existing low-temperature dry distillation production process mainly adopts the internal heating vertical carbonization furnace, which was invented in China, the patent number: ZL200610111733.8 and the Chinese invention patent, application number: 200610137759. Drying section, dry distillation section and cooling section; the furnace adopts a large cavity design, and adopts internal combustion and internal heating heating schemes. After the furnace gas is mixed with air, it enters the flower wall in the furnace, and is ejected and burned through the flower wall h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B49/02C10B53/02C10B53/04C10B53/06C10B49/06C10B49/10C10G55/06
CPCY02E50/10
Inventor 张庆军刘文洁王鑫张彪刘继华张忠清
Owner CHINA PETROLEUM & CHEM CORP
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