Comprehensive utilization system for waste heat and waste pressure in sulfuric acid production

[0012] Such as figure 1 Shown here is a comprehensive utilization system of waste heat and pressure in sulfuric acid production of the present invention, which includes a boiling furnace 1, a waste heat boiler 2, a steam turbine 3, a generator 4, a crystallization tank 5, a curing kiln 7 and a condensate pool 8. The gas outlet of boiling furnace 1 passes SO 2 The gas pipe 9 is connected to the air inlet of the waste heat boiler 2, the air outlet of the waste heat boiler 2 is connected to the air inlet of the steam turbine 3 through the steam pipe 10, the steam turbine 3 and the generator 4 are coaxially connected, and the air outlet of the steam turbine 3 passes The steam pipe 10 is connected with the air inlet of the crystallization tank 5, the air outlet of the crystallization tank 5 is connected with the atomizing nozzle 6 of the curing kiln 7 through the steam pipe 10, and the bottom of the curing kiln 7 is connected with the water inlet of the condensate collecting pool 8. The water outlet of the condensate collection tank 8 is connected to the water inlet of the boiling furnace 1 through a condensate pipe 11.

[0013] A hot water storage tank 14 is provided between the air outlet of the crystallization tank 5 and the spray device of the curing kiln 7, and the hot water storage tank 14 is connected to the spray device of the curing kiln 7 through a main water pipe 15. With this design, the steam output from the air outlet of the crystallization tank 5 can be stored and taken as needed.

[0014] For the monitoring of the maintenance kiln 7, the experience of the workers can be used, but this not only increases labor costs, but also causes energy waste and impact on bricklaying due to poor supervision. In this preferred embodiment, in order to achieve fully automated monitoring In the maintenance kiln 7, a hot water solenoid valve 12 is provided on the main water pipe 15, and an electric contact thermometer 13 is arranged in the kiln body of the maintenance kiln 7, and the electric contact thermometer 13 is connected to the hot water solenoid valve 12. In order to achieve the highest energy utilization rate of the curing kiln 7, and to more accurately control the curing temperature and humidity of the non-burning bricks in the kiln to improve the quality of the non-burning bricks, the spray device includes a plurality of spray devices arranged on the upper part of the kiln body And the branch water pipes arranged along the extension direction of the kiln body, the branch water pipes are connected with the main water pipe 15, each branch water pipe is provided with a hot water solenoid valve 12, and the outlet of each branch water pipe is provided with an atomizing nozzle 6. Directly below each atomizing nozzle 6, there is an electrical contact thermometer 13 connected to the hot water solenoid valve 12 on the corresponding branch water pipe.