China's first set of refractory bricks to water-cooled wall gasifier was fed in Shaanhua

On November 27, after the transformation and upgrading of the gasification D furnace of Shaanxi Chemical Company, the one-time feeding and start-up was successful, and crude syngas was produced, and various technical indicators were normal
.
It marks that the first set of large-scale refractory brick gasifier in China has been changed to Jinhua furnace and officially entered the production stage
.

Shaanxi Chemical Company has a total of 4 gasifier devices, of which the D furnace is different from the three gasifiers currently in operation, which is a single-nozzle coal water slurry gasifier, with a design daily coal input capacity of 1,500 tons, a pressure level of 6.
5MPa, and an effective gas output of 100,000 standard square meters per hour
.
In order to revitalize idle assets and improve the energy efficiency of the device, the company decided to use the domestic independent patented "Jinhua furnace" technology to upgrade the D furnace
.

The technical transformation increased the boiler water circulation system, the combustion chamber shell adopted the form of ring cavity gas protection and heat insulation, the original refractory brick form was replaced by an advanced water wall, and the new lowering cylinder was used to replace the traditional quenching ring plus lowering tube
.
After the transformation, the gasifier can use raw coal with a high ash melting point, which broadens the adaptability
of coal types.
The gasifier gasification efficiency and water-gas ratio are improved, and the continuous operation cycle of a single furnace can be increased from the original 80 days to more than 120 days, which will greatly reduce the frequency of gasifier maintenance, effectively reduce costs, and operate more safely and stably
.

The renovation of the D furnace began in June 2021 and lasted more than a year
.
In the process of transformation, the company strictly deployed, made overall arrangements, and coordinated to solve the technical difficulties encountered
.
Organize personnel to inspect and confirm process pipelines, blinds, valves, interlocks, safety facilities, system leakage, etc.
, eliminate all kinds of hidden dangers in the bud, and ensure that there are no hidden dangers and no dead ends
during driving.
The team members were systematically trained, and the problems and solutions that may occur in the process and operation were learned in detail to ensure the smooth completion
of D furnace transformation and recovery, pressure test elimination, and chain commissioning.