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A method for recovering block moving bed dry distillation oil gas and its recovery device

A recovery method and moving bed technology are applied in the field of a block moving bed dry distillation oil and gas recovery method and its recovery device, which can solve the problems of loss of high value-added light oil, easy oil decomposition, pipeline blockage, etc., so as to improve the dry distillation production. The effect of oil rate, less oil and gas dust, and improved recovery rate

Active Publication Date: 2018-01-30
QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem is that heavy, medium and light oils are mixed together, which increases the difficulty of oil-water separation due to the density and viscosity of the oil, especially coal tar
[0010] In addition, the light oil content in the coal gas output by the existing oil and gas recovery technology is 20-30g / Nm 3 , not only causes the loss of high value-added light oil, but also brings difficulties to the indirect heating of the heat carrier-circulating gas
Due to the indirect continuous heating of circulating gas (such as tube furnace heating), if the gas contains oil, the oil is easy to decompose and deposit carbon during the indirect heating process, resulting in pipeline blockage, making continuous heating of the heat carrier-gas impossible.

Method used

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  • A method for recovering block moving bed dry distillation oil gas and its recovery device
  • A method for recovering block moving bed dry distillation oil gas and its recovery device
  • A method for recovering block moving bed dry distillation oil gas and its recovery device

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Experimental program
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Effect test

Embodiment 1

[0064] like figure 1 shown, the specific steps are as follows:

[0065]1. Put the lignite blocks with a particle size of 15-18mm accounting for 83%, and the lignite blocks with a particle size of not more than 25mm and more than 18mm accounting for 17% into the drying and preheating section of the dry distillation furnace. Then move down slowly, pass hot flue gas of 350-400 °C from the lower part of the drying preheating section, directly heat the lignite block to moisture 150 °C, and pass 700 °C from the middle or lower part of the dry distillation section. The high-temperature gas at ~750℃ and the heating gas rising from the cooling section jointly carry out step-by-step heating and pyrolysis of the lignite block. Then, through the oil and gas outlet through the oil and gas channel, it enters the sedimentation chamber with the partition plate, so that the volatile flow forms a "W"-shaped bending flow, and naturally settles the dust carried in the oil and gas;

[0066] 2. P...

Embodiment 2

[0071] 1. Put the oil shale blocks with a particle size of less than 80mm and no more than 75mm accounting for 77%, and no more than 75mm and more than 70mm accounting for 23% into the drying preheating section of the retort furnace. The oil shale blocks are dried in the preheating section of the retort furnace and sealed. Section and dry distillation section move slowly from top to bottom, hot flue gas at 300-350℃ is introduced from the lower part of the drying and preheating section, and the oil shale block is directly heated to a moisture content of 110℃. The middle or lower part of the dry distillation section is fed with high temperature gas at 650-700℃ and the heating gas rising from the cooling section to heat and pyrolyze the oil shale block step by step. Multiple rows of large-cavity angular boxes collect gas, and then enter the settling chamber with partitions through the oil and gas outlet through the oil and gas channel, so that the volatile flow forms a "V"-shaped ...

Embodiment 3

[0077] 1. Put the lignite blocks with a particle size of 35-40mm accounting for 88%, no more than 45mm and 12% larger than 35mm into the drying and preheating section of the dry distillation furnace. Move at a slow speed, pass hot flue gas of 330~370℃ from the lower part of the drying and preheating section, directly heat the lignite block to moisture 130℃, and pass through the middle or lower part of the dry distillation section 680~ The high temperature gas at 720°C and the heating gas rising from the cooling section jointly carry out the step-by-step heating and pyrolysis of the lignite block. Through the oil and gas outlet through the oil and gas channel, it enters the sedimentation chamber with the partition plate, so that the volatile flow forms a "W"-shaped bending flow, and naturally settles the dust carried in the oil and gas;

[0078] 2. Pass the above dry distillation volatiles into the direct cooling dust collector, spray cooling and dedusting with phenol water unt...

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Abstract

The invention discloses a method for recovering block moving bed dry distillation oil gas and a recovery device thereof. The oil and gas recovery method comprises the steps of moving bed dry distillation, heavy oil recovery, medium oil recovery, light oil recovery and gas recovery. The oil and gas outlet of the dry distillation furnace of the recovery device is sequentially connected through the direct cooling dust collector, the heavy oil electric trap, the intercooler, the final cooler, the light oil absorption tower, the light oil electric trap, and the desulfurization tower, and the direct cooling dust collector is set to output The port is connected with the heavy oil clarification tank and the upper part is provided with a phenol water inlet, the heavy oil outlet is provided at the bottom of the heavy oil electric trap, the intercooler, the final cooler, the light oil absorption tower and the light oil electric trap are connected in sequence, and the lower part or the bottom is set The oil-water port of the oil-water separator is connected to the oil-water separator, the gas port of the light oil electric catcher is connected to the gas inlet of the desulfurization tower and / or the circulating gas system, and the gas outlet is arranged on the upper part of the desulfurization tower. The invention has the characteristics of high oil recovery rate, good oil quality, convenient subsequent processing of the oil product and low oil content of the output gas.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and particularly relates to a block moving bed dry distillation oil and gas recovery method and a recovery device with high oil recovery rate, good oil product quality, easy subsequent processing of oil products and low oil content of output gas. Background technique [0002] For a long time, one of the focuses of my country's sustainable economic development is energy. The focus of energy issues is oil. my country's oil reserves are very limited. Faced with the shortage of oil, it has become more and more important to find new alternative energy sources. Coal and oil shale pyrolysis technology can improve resource utilization value while reducing environmental pollution caused by coal combustion, and has broad application prospects. [0003] In the recovery of oil and gas by dry distillation of block gas heat carrier, the method of direct or indirect condensation until the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B47/20C10G1/00
Inventor 刘长胜罗国林
Owner QUJING ZHONGYI FINE CHEMICAL INDUSTRY CO LTD
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