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A pyrolysis tar pretreatment system and its treatment method

A treatment method and pretreatment technology, applied in tar processing, tar processing through distillation, and tar processing through chemical extraction, can solve the problems of high energy consumption, difficult industrialization, complex equipment, etc., and achieve easy industrial production. , The effect of simple installation and simple operation

Active Publication Date: 2021-03-23
胜帮科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The equipment of this scheme is complicated, the energy consumption is huge, and it is difficult to industrialize

Method used

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  • A pyrolysis tar pretreatment system and its treatment method
  • A pyrolysis tar pretreatment system and its treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The present embodiment provides a kind of pyrolysis tar pretreatment system and treatment method thereof, such as figure 1 As shown, the system includes a pre-separation tower 1 , a separation tank 2 , a heating furnace 5 , a heat extractor 6 and a cooler 7 .

[0058] Wherein, the middle section of the pre-separation tower 1 is provided with a washing section below, the side line of the pre-separation tower 1 is provided with a material inlet and a reflux inlet, and the top gas outlet of the pre-separation tower 1 and the material inlet of the separation tank 2 are used for pipelines. Connected, the pipeline is provided with a cooler 7.

[0059] The middle section of the pre-separation tower 1 is provided with a light coal tar extraction port to extract the light coal tar. The light coal tar produced is divided into three parts, and the first part of the light coal tar is returned to the light coal tar in the pre-separation tower 1 through pipelines. The upper tower bo...

Embodiment 2

[0071] The present embodiment provides a kind of pyrolysis tar pretreatment system and treatment method thereof, such as figure 2 As mentioned, the system includes a pre-separation tower 1, a separation tank 2, a dehydration tank 3, a heater 4, a heating furnace 5, a heat extractor 6, a cooler 7 and a feed pump 8.

[0072] Wherein, the middle section of the pre-separation tower 1 is provided with a washing section below, the side line of the pre-separation tower 1 is provided with a material inlet and a reflux inlet, and the top gas outlet of the pre-separation tower 1 and the material inlet of the separation tank 2 are used for pipelines. Connected, the pipeline is provided with a cooler 7.

[0073] The middle section of the pre-separation tower 1 is provided with a light coal tar extraction port to extract the light coal tar. The light coal tar produced is divided into three parts, and the first part of the light coal tar is returned to the light coal tar in the pre-separat...

Embodiment 3

[0085] This embodiment provides a kind of pyrolysis tar pretreatment system and its treatment method, its pretreatment system and its treatment method refer to embodiment 2, the difference is:

[0086] In the step (1) of the treatment method, the pyrolysis tar at 150°C is heated to 220°C with the heater 4 and then enters the dehydration tank 3 for dehydration treatment to obtain the gas phase and bottom oil, wherein the gas phase enters the side line washing section above the pre-separation tower 1 The material inlet of the bottom oil is pumped into the heating furnace 5 with the feed pump 8, and after being heated to 420°C, it enters the material inlet of the side line washing section of the pre-separation tower 1 for pre-separation;

[0087] In step (2) of the treatment method, the overhead gas extracted from the pre-separation tower 1 enters the separation tank 2 after being cooled to 60° C. by the cooler 7 .

[0088] In step (4) of the treatment method, the oil phase produ...

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Abstract

The invention discloses a pyrolysis tar preprocessing system and method. The system comprises a pre-separation tower and a separation tank and is characterized in that the pre-separation tower is provided with a washing section, the lateral line of the pre-separation tower is provided with a material inlet and a backflow inlet, and the tower top gas outlet of the pre-separation tower is connectedwith the material inlet of the separation tank; the middle section of the pre-separation tower is provided with a light coal tar recovering port, the first part of the recovered light coal tar returnsto the tower body above the recovering port, the second part of the recovered light coal tar is recovered, and the third part of the recovered light coal tar returns to the tower body below the recovering port; the first part of the oil phase recovered from a washing section lateral line recovering port upwardly returns to the tower body above the lateral line recovering port, the second part ofthe oil phase recovered from the washing section lateral line recovering port returns to the material inlet of the pre-separation tower, and the third part of the oil phase recovered from a washing section lateral line recovering port is recovered; part of the light coal tar recovered from the coal tar outlet of the separation tank flows back to the top of the pre-separation tower. By the system,the recovered light coal tar is low in solid content, and long-term operation of a downstream fixed-bed hydrogenation device can be guaranteed.

Description

technical field [0001] The invention belongs to the field of pyrolysis tar processing in the field of energy and chemical industry, and in particular relates to a pyrolysis tar pretreatment system and a processing method thereof. Background technique [0002] At present, the pyrolysis of coal is one of the important paths for coal quality utilization. Coal pyrolysis refers to the complex process of a series of physical changes and chemical reactions that occur at different temperatures when coal is heated in the absence of air. Under low temperature conditions, coal pyrolysis produces gas, pyrolysis tar and semi-coke. The pyrolysis coal tar is pretreated and separated, and the light coal tar directly enters the fixed bed coal tar hydrogenation unit, and the heavy coal tar is mostly lightened by the suspension bed hydrogenation technology. However, pyrolysis tar will carry a small amount of powder coke (particle size <100 μm) in the pyrolysis reaction. If the pyrolysis t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/14C10C1/20
CPCC10C1/14C10C1/205
Inventor 尚建选周晓晓常伟先
Owner 胜帮科技股份有限公司