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Coal horizontal rotation dry distillation process and equipment

A horizontal, dry distillation technology, applied in the field of coal chemical industry, can solve the problems of blockage of pipelines by solid materials, low heat utilization rate, low gas calorific value, etc. Effect

Inactive Publication Date: 2012-06-20
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solid heat carrier of this equipment is transported vertically, which has high energy consumption, and the generated gas has a low calorific value and low heat utilization rate. The solid material is not transported smoothly, and the solid material is prone to block the pipeline, causing the system to fail.
[0004] The thermal efficiency of the three-barrel dry distillation equipment developed by the coal research department is low, the calorific value of the internal heating type gas is low, and the external heating type equipment is huge, so it has not been industrialized
[0005] The semi-coke dry distillation technology in northern Shaanxi represented by the straight square furnace can only dry lump coal and cannot process surface coal, resulting in a waste of coal resources

Method used

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  • Coal horizontal rotation dry distillation process and equipment
  • Coal horizontal rotation dry distillation process and equipment
  • Coal horizontal rotation dry distillation process and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 Shown is a coal horizontal rotary carbonization equipment, which includes a drier 1 for drying and preheating coal, and a horizontal rotary retort connected to the discharge port of the drier 1 for carbonization and pyrolysis of coal Dry distillation furnace 2; the horizontal rotary dry distillation furnace 2 includes a feed section 2-1, a dry distillation section and a discharge section 2-2, and the outlet of the discharge section 2-2 is arranged at one end of the semi-coke cooler 3 The feed port is connected, and a coke filter is provided between the discharge port of the feed section 2-1 for discharging coke oven gas and tar gas produced by carbonization and pyrolysis and the gas desulfurization filter 4 inlet port. The pipeline 5 equipped with a catalyst for the cracking and lightening of furnace gas and tar gas, the exhaust port of the gas desulfurization filter 4 is connected with the air inlet arranged at the other end of the semi-coke cooler 3, ...

Embodiment 2

[0051] Adopt the equipment of embodiment 1 to carry out horizontal rotary dry distillation to coal:

[0052] Step 1. Pass the hot flue gas produced by the gas generator 6 into the air heat exchanger 8 to perform countercurrent indirect heat exchange with the air, and send the heat-exchanged air as combustion-supporting air into the gas generator 6 for combustion and power generation. The flue gas discharged from the flue gas outlet of the air heat exchanger 18 with a temperature not less than 400°C and the raw coal (Shenmu crushed coal with a particle size not greater than 30mm) are sent to the dryer 1 together, through the contact flow heat exchange method Drying and preheating the raw coal until the temperature of the raw coal is not lower than 250°C;

[0053] Step 2: Send 10% of the total weight of raw coal preheated in step 1 into the hot blast stove 11 for combustion, and use the flame generated by the combustion to heat the annular space formed between the outer cylinder...

Embodiment 3

[0061] The process of this example is the same as that of Example 2, except that the solid carrier used is quartz sand, iron oxide powder, semi-coke or other granular oxide catalysts.

[0062] In the process of this embodiment, the generated flue gas and semi-coke waste heat are rationally utilized, and the heat utilization rate is high, and the generated gas is used to generate electricity to realize the self-sufficiency of equipment power; at the same time, cold coal gas coke is used, and the semi-coke waste heat is utilized. Compared with the semi-coke produced by the traditional method, the produced semi-coke does not contain water, has high quality and wide application, and the produced tar has high yield and good quality. The specific results are shown in Table 3.

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Abstract

The invention discloses coal horizontal rotation dry distillation equipment, which comprises a dryer and a horizontal rotation gas retort, wherein the dryer is used for drying and preheating the coal; the horizontal rotation gas retort is communicated with the discharge hole of the dryer and is used for performing dry distillation and thermolysis on the coal; the horizontal rotation gas retort comprises a feeding section, a dry distillation section and discharge section; the discharge hole of the discharge section is communicated with a feeding hole arranged at one end of a carbocoal cooler; and a light pipeline which is used for performing cracking on coke-oven gas and tar gas and is filled with a catalyst is arranged between an exhaust port which is arranged on the feeding section and is used for discharging the coke-oven gas and the tar gas which are generated by dry distillation themolysis and the suction port of a coal gas desulfuration filter. Moreover, the invention also provides a process for performing horizontal dry distillation on the coal by utilizing the equipment. In the process, the waste heat of generated gas fume and carbocoal is reasonably utilized, and the heat use ratio is high. Compared with carbocoal produced by a traditional method, the carbocoal produced by the process does not contain water and has high quality and wide application, and the produced tar has high yield and high quality.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a coal horizontal rotary dry distillation process and equipment. Background technique [0002] my country is rich in coal resources, but oil resources are relatively scarce. In recent years, due to fluctuations in oil prices, in order to reduce dependence on oil, the use of coal-to-oil technology has been widely valued by domestic scholars. The traditional dry distillation method is used to process raw coal, and the tar obtained is less and the oil yield is low. However, direct coal liquefaction and indirect liquefaction to produce oil have high cost, large investment, high energy consumption, and the products are difficult to separate. [0003] The rapid pyrolysis and dry distillation technology of lignite and oil shale solid heat carrier developed by relevant domestic universities has opened up a new way for the effective use of powdery raw materials...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10B53/08C10B57/00C10B57/10C10B51/00C10B39/02C10K1/00F02B43/10F02B63/04
CPCY02T10/32Y02T10/16Y02P20/129Y02T10/12Y02T10/30
Inventor 赵鹏
Owner CHANGAN UNIV
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