Low-rank coal low-temperature dry distillation pyrolysis process
A low-rank coal and dry distillation technology, applied in the field of coal dry distillation, can solve the problems of high energy consumption, waste of resources, and high pollution emissions, and achieve the effects of reducing environmental pollution and solving dust entrainment
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[0028] Example 1
[0029] Combine below figure 1 The present invention will be further explained.
[0030] A low-temperature dry distillation and pyrolysis process of lignite includes the following steps:
[0031] 1. The brown coal is dried, crushed, and screened. The under-screen material with a particle size of ≤50 mm and a water content of 30.1% is selected and sent to the hopper above the vertical and multi-layer dry distillation furnace, and enters the drying section through the feeder and the discharge pipe. Under the thrust of the rake teeth in the furnace, it is uniformly pushed and turned on each furnace level, moving down layer by layer, and is combined with the hot oil and gas gas that is generated by the dry distillation and pyrolysis in the dry distillation section and passes through the preheating section furnace layer to rise to the drying section. The gas is in countercurrent mixed flow contact to complete the drying and dehydration process;
[0032] 2. The dried lig...
Example Embodiment
[0037] Example 2
[0038] A low-temperature dry distillation and pyrolysis process of lignite includes the following steps:
[0039] 1. The lignite is dried, crushed and sieved. The under sieve with a particle size of ≤50 mm and a water content of 18.9% is selected and sent to the hopper above the vertical, multi-layer dry distillation furnace, and enters the drying section through the feeder and the discharge pipe. Under the thrust of the rake teeth in the furnace, it is uniformly pushed and turned on each furnace level, moving down layer by layer, and is combined with the hot oil and gas gas that is generated by the dry distillation and pyrolysis in the dry distillation section and passes through the preheating section furnace layer to rise to the drying section. The gas is in countercurrent mixed flow contact to complete the drying and dehydration process;
[0040] 2. The dried lignite material enters the preheating section through the drying section. Under the thrust of the rake...
Example Embodiment
[0045] Example 3
[0046] A long-flame coal low-temperature dry distillation pyrolysis process includes the following steps:
[0047] 1. The long-flame coal is dried, crushed, and sieved. The under sieve with a particle size of ≤50 mm and a water content of 27.6% is selected and sent to the hopper above the vertical, multi-layer dry distillation furnace, and enters the drying section through the feeder and the discharge pipeline. Under the action of the rake teeth in the furnace, the material is uniformly pushed and turned on each furnace level, moving down layer by layer, and is combined with the heat generated by the dry distillation pyrolysis in the dry distillation section and passes through the preheating section furnace layer to rise to the drying section. Oil, gas and gas are in countercurrent mixed flow contact to complete the drying and dehydration process;
[0048] 2. The dry long flame coal material enters the preheating section through the drying section. Under the thrus...
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