Gas-solid mixed heat carrier quick pulverized coal pyrolysis process and device

A technology of gas-solid mixing and pulverized coal, which is applied in the petroleum industry, special forms of dry distillation, coking ovens, etc., can solve the problems of small processing scale, difficulty in recycling coal tar, short operation period, etc., and achieve stable pyrolysis reaction temperature and The effect of pyrolysis oil gas temperature, ensuring smooth operation of the process, and reducing dust content

Inactive Publication Date: 2016-01-13
SHAANXI MEISILIN ENERGY SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country started relatively late in the field of pulverized coal pyrolysis, without mature, reliable and stable technology, and has long been in a backward stage with simple product structure and small processing scale.
At the same time, the pulverized coal pyrolysis industrial demonstration units that have been built have the following shortcomings in varying degrees: (1) The pyrolysis oil and gas contain a lot of dust, and the coal tar produced is difficult to recycle; (2) The process is unstable, the operation period is short, The operation is difficult; (3) The process is complicated, the process is long, and the investment is high, which is not conducive to popularization and application

Method used

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  • Gas-solid mixed heat carrier quick pulverized coal pyrolysis process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] see figure 1 , a gas-solid mixed heat carrier rapid pulverized coal pyrolysis process based on the device, comprising the following steps:

[0070] (1) Send the dried raw coal 5 with a particle size of 0.2 to 8mm and a temperature of 150°C into the dry raw coal bunker m, and the dried pulverized coal in the dried raw coal bunker m enters the L-shaped coal from the bottom outlet. The dry raw coal control valve merges with the pyrolysis oil and gas at 600°C from the high-temperature centrifugal fan 1, and enters the swirl mixer built in the middle of the pyrolysis reactor, and adjusts the drying with the flow rate of the pyrolysis oil and gas. Raw coal 5 flow rate.

[0071] (2) The high-temperature semi-coke from the simple separator i enters the L-shaped high-temperature semi-coke control valve o from the bottom discharge port and merges with the pyrolysis oil gas with a temperature of 600 ° C from the high-temperature centrifugal fan l, and the pyrolysis oil gas Under...

Embodiment 2

[0079] see figure 1 , a gas-solid mixed heat carrier rapid pulverized coal pyrolysis process, comprising the following process steps:

[0080] (1) Dry and sieve the mined or purchased raw pulverized coal, or select the pulverized coal washed in the coal washing plant for drying. The dried raw coal 5 has a particle diameter of 0.2-8 mm and a temperature of 130° C., and is sent into the dry raw coal bunker m. The dry pulverized coal in the dry raw coal bunker m enters the L-shaped dry raw coal control valve n from the bottom outlet, and merges with the pyrolysis oil and gas at 400°C from the high-temperature centrifugal fan l, and the drying is adjusted by the flow rate of the pyrolysis oil and gas. The flow rate of the raw coal 5 enters the swirl mixer c built in the middle of the pyrolysis reactor a.

[0081] (2) The high-temperature semi-coke from the simple separator i enters the L-shaped high-temperature semi-coke control valve o from the bottom outlet, and merges with th...

Embodiment 3

[0089] Select Shenmu coal, 0.2-8mm, 140°C dry pulverized coal 5 treated by a vibrating fluidized bed dryer as raw material, and send it into the dry raw material coal bunker m. The dry pulverized coal 5 in the dry raw coal bunker m enters the L-shaped dry raw coal control valve n from the bottom outlet, and merges with the 450°C pyrolysis oil and gas from the high-temperature centrifugal fan l, and is adjusted by the flow rate of the pyrolysis oil and gas The flow of dry raw coal 5 enters the swirl mixer c built in the middle of the pyrolysis reactor a. The high-temperature semi-coke from the simple separator i enters the L-shaped high-temperature semi-coke control valve o from the bottom outlet, and merges with the pyrolysis oil gas from the high-temperature centrifugal fan l, and adjusts the flow rate of the high-temperature semi-coke according to the flow rate of the pyrolysis oil gas flow, and enter the swirl mixer c built in the middle of the pyrolysis reactor a. Dry pul...

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Abstract

The invention discloses a gas-solid mixed heat carrier quick pulverized coal pyrolysis process and a device. The device includes a diameter variable pyrolysis reactor, the top outlet of the pyrolysis reactor is provided with a pyrolytic oil gas collector, a vortex mixer is hidden in the middle part, a breathable heat storage layer is arranged at the lower part, two hot semicoke outlets are arranged at the bottom, one outlet is used for discharging hot semicoke, and the other outlet is connected to a tobacco pipe type refeeder, the tobacco pipe type refeeder is connected to a simple separator through a combustion lift pipe, the bottom of the simple separator is provided with an L-shaped high temperature semicoke control valve, the bottom of a dry raw material coal bunker is equipped with an L-shaped dry raw material coal control valve, outlets of the two valves are respectively connected to two inlets of the vortex mixer, the pyrolytic oil gas collector is in connection with an oil gas inlet manifold box of a box type multi-tube cyclone dust collector, the outlet of the box type multi-tube cyclone dust collector is connected to a high temperature centrifugal fan, the outlet of the high temperature centrifugal fan is connected to the L-shaped dry raw material coal control valve and the L-shaped high temperature semicoke control valve. Therefore, disadvantages of the prior art are overcome.

Description

technical field [0001] The invention belongs to the field of pyrolysis of pulverized coal (oil shale), and in particular relates to a rapid pulverized coal pyrolysis process and device of a gas-solid mixed heat carrier. Background technique [0002] my country has more coal and less oil. Although coal resources are relatively abundant, low-rank coals such as lignite and long-flame coal account for about 53% of the total coal in my country. At present, most of these types of coal are directly used as fuel for power generation; therefore, a pulverized coal was developed Pyrolysis process, pull out the coal tar with hydrogen-rich components before coal combustion and further process it, increase the added value of pulverized coal, reduce the emission of sulfide and nitrogen oxides during the combustion process, and protect the atmospheric environment is of great significance . [0003] my country has long been represented by the process of producing semi-coke by pyrolysis of lum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04
Inventor 佘焱董芳儒
Owner SHAANXI MEISILIN ENERGY SCI & TECH RES INST
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