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A low-rank coal adiabatic pyrolysis device

A low-rank coal and thermal insulation technology, which is applied in the direction of direct heating dry distillation, special form dry distillation, petroleum industry, etc., can solve the problems of high strength requirements of reactor materials, easy loss, difficult maintenance, etc., and achieve easy control of residence time and increase heat High solution efficiency and good heat insulation effect

Inactive Publication Date: 2017-02-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of adiabatic reactor is that the temperature control of the electric furnace is adjusted by the temperature change of the reactor, there is a lag problem in temperature tracking, the heat transfer from the periphery to the inside is slow, it takes a long time, the operation is complicated, and the maintenance is difficult
In this invention, maintaining the vacuum state of the vacuum jacket requires high energy consumption, requires high strength of the reactor material, and is easy to wear and tear, which is not conducive to large-scale industrial application.

Method used

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  • A low-rank coal adiabatic pyrolysis device
  • A low-rank coal adiabatic pyrolysis device
  • A low-rank coal adiabatic pyrolysis device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0040] To implement a low-rank coal adiabatic pyrolysis device, a gas insulation layer and an outer insulation layer are sequentially arranged around the retort chamber, and when the low-rank coal is adiabatically pyrolyzed, the gas is injected into the gas insulation chamber layer to react with the pyrolysis reaction. The isothermal heat-carrying temperature gas makes the wall temperature of the reaction device basically consistent with the central reaction temperature of the reaction device, and the gas insulation layer does not exchange heat with the drying chamber / distillation chamber to avoid heat loss reduction. The specific improvement measures taken are to coaxially install a gas insulation layer jacket around the outer wall of the retort, and set up a hot gas circulation pipeline, so that the heated gas enters from the insulation gas inlet and the high temperature gas inlet of the adiabatic reaction device respectively, and the high temperature The heat-carrying gas ex...

specific Embodiment approach 2

[0051] This specific embodiment 2 is an embodiment based on the specific embodiment 1, and those skilled in the art can realize the technical solution of the present invention according to the following specific embodiments.

[0052] as attached figure 1 , N 2 After heating up to 600°C with a 30kw heater, the high-temperature gas inlet and the insulating gas inlet of the adiabatic retort chamber are fed into, and the temperature of the air inlet of the adiabatic retort chamber and the temperature of the central area are compared with time as shown in the appendix Image 6 , It can be observed from the attached figure that the basic heat loss is within the acceptable range≦30°C without adding coal material, which ensures the thermal insulation effect of the device.

[0053] as attached figure 1 , 3 kg of lignite with a particle size of 1 to 5 mm, relying on gravity, enters the reaction device from the hopper, N 2 After the 15KW heater is heated to about 300°C, it is passed i...

specific Embodiment approach 3

[0056] On the basis of Embodiment 1, by changing the particle size of coal, observe its reaction.

[0057] Put 3.0kg lignite with a particle size of 5-10mm into the reaction device from the hopper by gravity, N 2 After the 15KW heater is heated to about 300°C, it is passed into the gas insulation layer and the heat-insulating drying room respectively, and the coal material in the heat-insulating drying room is preheated and dried. The drying time is about 20 minutes; then the coal material passes through the discharge hole on the discharge turntable. Falling into the chute, the coal is controlled by the high temperature ball valve to enter the adiabatic retort chamber; N 2 After a 30kw heater heats up to 600°C, it enters from the gas distributor at the bottom of the adiabatic retort chamber and exchanges heat with the coal material. After a period of time, the temperature of the coal material rises and begins to pyrolyze, releasing pyrolysis volatiles. Get half-focused. The ...

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Abstract

The invention relates to a low-rank coal adiabatic pyrolysis device which is composed of a charging hopper, an adiabatic drying chamber, an adiabatic dry distillation chamber and a coke quenching tank which are communicated in sequence, wherein the adiabatic drying chamber is the same as the adiabatic dry distillation chamber in diameter and size; gas insulation layers which have the same temperature as the adiabatic drying chamber and the adiabatic dry distillation chamber are respectively arranged on the peripheries; outer insulation layers are respectively arranged on the peripheries of the adiabatic drying chamber and the adiabatic dry distillation chamber. The low-rank coal adiabatic pyrolysis device is simple in structure and good in adiabatic effect, coal materials move downwards by means of gravity, tail gas generated in the drying process and tail gas generated in the pyrolysis process are separately processed, the retention time of discharge quantity is easy to control, and the air inlet temperature is basically consistent with the center temperature of a reactor, so that the pyrolysis efficiency of a coal pyrolysis reactor is greatly improved.

Description

technical field [0001] The invention relates to a low-rank coal pyrolysis reactor, in particular to a gas heat-carrying coal pyrolysis device comprising a charging hopper, an adiabatic drying chamber, an adiabatic carbonization chamber and a coke quenching tank. Background technique [0002] During the pyrolysis process of low-rank coal, using gas heat carrier to carry out coal pyrolysis can improve the heat exchange efficiency between coal and heat carrier. An important pathway for the efficiency of bulk thermal pyrolysis reactions. [0003] The thermal insulation structure of the existing coal pyrolysis reactor is mainly wrapped with high-temperature refractory fiber material around the reactor, and wrapped with resistance wire around the outer wall of the reactor to form the thermal insulation structure. [0004] Available prior art, such as the publication number 102559222A discloses "a low-temperature carbonization furnace" which provides a low-temperature carbonizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10B49/02C10B57/10
CPCC10B49/02C10B53/04C10B57/10
Inventor 李涛张永发王影乔星星王琪
Owner TAIYUAN UNIV OF TECH
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