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A system for drying blast furnace gas with residual heat from flue gas from hot blast stove

A technology for the waste heat of blast furnace gas and flue gas, which is applied to the system field of drying blast furnace gas with the waste heat of hot blast stove flue gas, can solve the problems of reducing the calorific value of blast furnace gas, increasing the consumption of blast furnace gas, etc., and achieves the effects of prolonging the contact time and reducing the height

Active Publication Date: 2019-03-29
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the main combustible component of blast furnace gas is CO, and blast furnace gas is usually in a saturated state, blast furnace gas contains more water vapor, which not only reduces the calorific value of blast furnace gas, but also increases the consumption of blast furnace gas

Method used

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  • A system for drying blast furnace gas with residual heat from flue gas from hot blast stove
  • A system for drying blast furnace gas with residual heat from flue gas from hot blast stove

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 and figure 2 As shown, a system for drying blast furnace gas with waste heat of flue gas from a hot blast stove, including a dryer 1, a regenerator 11, two sets of conveying lifting devices and a desiccant. The bottom of the dryer 1 is provided with a desiccant discharge port, and the lower part is provided with a blast furnace Gas inlet 7, a drying channel in the middle, a desiccant inlet and a blast furnace gas outlet 8 at the top, a desiccant discharge port at the bottom of the regenerator 11, a hot blast stove flue gas inlet at the lower part 9, and regeneration in the middle The channel and the top are provided with a desiccant feed port and a hot blast stove flue gas outlet 10, the blast furnace gas outlet 8 is connected to the inlet of the hot blast stove 12, and the exhaust port of the hot blast stove 12 is connected to...

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Abstract

The invention relates to a process system for drying blast furnace gas through smoke waste heat of a hot blast stove. The process system comprises a dryer, a regenerator, two sets of conveying and lifting devices and a drying agent. A drying agent discharging port is formed in the bottom of the dryer, a blast furnace gas inlet is formed in the lower portion of the dryer, a drying channel is formed in the middle portion of the dryer, and a drying agent feeding port and a blast furnace gas outlet are formed in the top of the dryer. A drying agent discharging port is formed in the bottom of the regenerator, a hot blast stove smoke inlet is formed in the lower portion of the regenerator, a drying agent regeneration channel is formed in the middle portion of the regenerator, a drying agent feeding port and a hot blast stove smoke outlet are formed in the top of the regenerator. The blast furnace gas outlet is connected to the hot blast stove, the hot blast stove is connected with the hot blast stove smoke inlet through a preheater, the drying agent discharging port of the dryer is connected to the drying agent feeding port of the regenerator through one set of conveying and lifting device, and the drying agent discharging port of the regenerator is connected with the other set of conveying and lifting device. The process system indirectly dries the blast furnace gas through the smoke waste heat of the hot blast stove, no pollution is caused for the blast furnace gas, energy sources are saved, and the calorific value of the blast furnace gas is increased.

Description

technical field [0001] The invention relates to the field of recovery of waste heat from flue gas from hot blast stoves, in particular to a system for drying blast furnace gas with waste heat from flue gas from hot blast stoves. Background technique [0002] The hot blast stove generates high-temperature air by burning blast furnace gas and blows the high-temperature air into the blast furnace to increase the smelting strength of the blast furnace. After the blast furnace gas is burned, the temperature of the flue gas discharged from the hot blast stove is 280-350°C, and the flue gas is usually passed into the preheater Internal preheating air or double preheating of air and gas, the temperature of the flue gas discharged from the preheater drops to about 150°C, and it is usually discharged directly without being used. [0003] Since the main combustible component of blast furnace gas is CO, and blast furnace gas is usually saturated, there is more water vapor in blast furna...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B9/00C21B5/06
CPCC21B5/06C21B9/00
Inventor 施万玲
Owner WISDRI ENG & RES INC LTD
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