The differences
The equipment of the single-stage gas producer is relatively simple, consisting of a water jacket, a bottom device and a slag discharge system. If the kiln with low gas cleanliness can choose a single-stage gas producer, it is relatively economical.
The two-stage gas producer has one more dry distillation section than the single-stage furnace, which is an upgrade and improvement of the single-stage furnace. After adding a dry distillation section, the calorific value of producer gas is improved, the comprehensive utilization rate of coal is also improved, and the purity of the gas is higher.
Advantages and disadvantages of one-stage gas producer
1.Advantages(1) Less construction investment: This is mainly reflected in the less investment in one-stage gasifier equipment and civil engineering
(2) Short construction period: the one-stage gas producer hot gas station is much shorter than the other two furnace types in terms of equipment manufacturing cycle, equipment installation and commissioning cycle, or plant infrastructure construction cycle
2. Disadvantages (1) Coal gas carries more ash: When the one-stage gas generator is operated, the empty layer is high and the material layer is thin. The coal charging, brazing and thermal explosion of the coal produce a large amount of pulverized coal, which is carried out by the gas, resulting in Waste of resources and blockage of gas pipelines (2) The quality of the tar produced is poor: the dry distillation of the one-stage gas generator produces high-temperature cracking tar with higher viscosity and poor fluidity. This part of tar is not easy to handle and use, and it is easy Glue the coal powder carried by the gas and block the gas pipeline. (3) Short gas transportation distance: The tar and coal powder in the gas deposit in the gas pipeline, which often blocks the pipeline, which increases the gas transportation resistance and restricts the gas transportation distance.
Advantages and disadvantages of two-stage gas generators:
1.Due to the addition of a dry distillation section with a suitable height and structure, the two-stage coal gas producer will slowly heat the coal in the dry distillation section for low-temperature dry distillation. The tar produced will not be cracked, the tar viscosity is low, and the fluidity is good. 2.When the hot gas is transported over a long distance, it is not easy to block the pipeline
