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Continuous pyrolysis apparatus and continuous pyrolysis method for coal direct liquefaction residue

A technology of direct liquefaction and pyrolysis of coal, which is applied in special forms of dry distillation, petroleum industry, coking ovens, etc. It can solve the problems of coking oven leaks that easily cause major accidents, difficulty in crushing semi-coke, and high sealing requirements. To achieve the effect of continuous pyrolysis

Active Publication Date: 2019-02-26
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong adhesion of liquefied residues in the molten state, it is still difficult for the differential speed twin-screw conveying device to achieve the purpose of pulverizing semi-coke, and the negative pressure operation costs are high, and the requirements for sealing are too high , coking furnace air leakage is likely to cause major accidents

Method used

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  • Continuous pyrolysis apparatus and continuous pyrolysis method for coal direct liquefaction residue
  • Continuous pyrolysis apparatus and continuous pyrolysis method for coal direct liquefaction residue
  • Continuous pyrolysis apparatus and continuous pyrolysis method for coal direct liquefaction residue

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Embodiment 1

[0048] This embodiment is used to illustrate the continuous pyrolysis device and its method suitable for direct coal liquefaction residue of the present invention.

[0049] use figure 2 In the continuous pyrolysis device shown, the coal direct liquefaction residue (temperature is 310°C) is pumped to the feed port 301 through the feed pump 4 at a flow rate of 1000kg / h and then enters the rotary drum roaster. Next, and under the rotation of the furnace drum of the rotary cylindrical roaster and the free movement of the metal rods inside, the coal direct liquefaction residue is continuously pyrolyzed (furnace body speed 0.9r / min, residence time 60min), to obtain Pyrolysis gas and hot semi-coke, the pyrolysis gas is discharged through the pyrolysis gas outlet 304 and enters the oil-gas separation unit for separation to obtain tar and flue gas, and the hot semi-coke enters the cooling unit from the semi-coke outlet for cooling to obtain semi-coke products.

[0050] After 10 hours...

Embodiment 2

[0052] This embodiment is used to illustrate the continuous pyrolysis device and its method suitable for direct coal liquefaction residue of the present invention.

[0053] According to the method described in embodiment 1, the difference is that the rotating speed of the rotary drum roaster is 1.4r / min, the residence time is 39min, and others are all the same as in embodiment 1.

[0054] After 10 hours of continuous operation, the total direct coal liquefaction residue is 10,000kg, the resulting semi-coke product output is 8,124kg, the total output of tar and water is 1,064kg, and the flue gas output is 812kg. Among them, the particle size of the semi-coke obtained in this process is between 0- 30mm.

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Abstract

The invention relates to the field of continuous pyrolysis of coal direct liquefaction residue, particularly to a continuous pyrolysis apparatus and a continuous pyrolysis method for coal direct liquefaction residue. The apparatus comprises a material feeding unit, a pyrolysis unit and a material discharge unit, wherein the pyrolysis unit comprises a rotary pyrolysis reactor (3) for carrying out pyrolysis on coal direct liquefaction residue, and a metal rod capable of freely moving is arranged in the reaction cavity (302) of the rotary pyrolysis reactor (3). According to the present invention,the metal rod capable of freely moving is skillfully arranged in the reaction cavity of the rotary pyrolysis reactor, such that the semi-coke generated by the pyrolysis of the coal direct liquefaction residue can be onlinely crushed under the impact of the freely-moving metal rod so as to easily achieve the continuous pyrolysis of the coal direct liquefaction residue.

Description

technical field [0001] The invention relates to the field of continuous pyrolysis of coal direct liquefaction residue, in particular to a continuous pyrolysis device and method suitable for coal direct liquefaction residue. Background technique [0002] In the existing direct coal liquefaction process, the conversion rate of coal cannot reach 100%, and there will always be unreacted coal, inorganic minerals and some catalysts in the solid form. They are mixed with liquefied oil, and various liquefaction processes use different solid-liquid separation methods to separate them from liquefied oil. The unseparated liquefied oil and the remaining solid matter are collectively called liquefaction residue, which is one of the by-products of the liquefaction process. The output of liquefaction residue accounts for about 30% of the feed coal. Take the Shenhua Coal Direct Liquefaction Demonstration Project as an example. Its scale produces 5Mt of oil products per year. The first pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B57/00
CPCC10B53/00C10B57/00
Inventor 陈强索娅孙永伟朱豫飞
Owner CHNA ENERGY INVESTMENT CORP LTD
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