The illustration depicts the step-by-step procedures involved in the production of electricity from coal.
Overall, there are eight primary stages to generate electricity, beginning with mining coal from colliery and culminating with introducing electricity into industry and lives. In some stages of the process, waste heat is the inevitable by-product.
Starting with the first four phases, people exploit coal from a coal mine and then deliver it to a crusher, where coal is broken down into small fragments for easier combustion in the next steps. After that, these coal-crushed pieces are transferred to the gasifier, where the burning stage under the oppressive heat occurs to turn coal into gas.
After this step is completed, the produced gas is cooled down, which also emits some consequent heat into the atmosphere. Once cooled, the gas is gone through a cleaning stage to remove the waste contamination. Afterward, the purified gas becomes input for the generation of electricity in the gas power plant. In the end, the electricity will be distributed to households and to industry, in addition to some waste heat.