Pascal Blasio, 57, has been sentenced to 20 years in prison after being found guilty of causing an explosion likely to endanger life.
The businessman blew up his furniture shop, in New Ferry, in March 2017.
His conviction followed a three-week trial at Liverpool Crown Court.
He was also found guilty of fraud in relation to an insurance claim submitted after the incident.
As a result of the blast over 80 people were injured and damage was caused to over 60 homes, shops and businesses in the town centre.
In passing sentence His Honour Judge Thomas Teague QC said:
He also commended the two investigating officers along with the investigating fire officer.
Assistant Chief Constable Natalie Perischine, said:
Watch Rachel Townsend's report here: