一种转炉烟气余热余能深度回收系统
By introducing a three-way valve switching system for flue gas composition analysis and control, and waste heat recovery equipment into the converter steelmaking system, the problems of low-calorific-value gas venting and unutilized waste heat have been solved, realizing deep waste heat and energy recovery and utilization of converter flue gas, and reducing environmental pollution and production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TANGSHAN IRON & STEEL GROUP
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-17
AI Technical Summary
The low-calorific-value converter gas generated during the converter steelmaking process is released through the venting tower, resulting in environmental pollution and energy waste. Furthermore, the waste heat of the gas after treatment by the evaporative cooler is not effectively utilized.
The system employs equipment such as evaporative coolers, fans, component analyzers, flue gas heat exchangers, combustion furnaces, steam drums, and venting towers. By controlling the switching of three-way valves through flue gas component analysis, it achieves combustion and waste heat recovery of low-calorific-value coal gas in the combustion furnace. Combined with the heat exchanger and steam drum system, it recovers low-pressure steam and hot water.
This achieves full recovery and utilization of low-calorific-value coal gas energy, reduces greenhouse gas emissions, lowers production costs, improves economic efficiency, and reduces environmental pollution.
Smart Images
Figure CN224513540U_ABST
Abstract
Claims
1. A converter flue gas waste heat and waste energy deep recovery system, characterized in that, The converter (1) includes an evaporative cooler (3), a fan (5), a flue gas composition analyzer (6), two three-way valves, a flue gas heat exchanger (8), a converter cabinet (9), a combustion furnace (11), a steam drum (12), and a venting tower (13). The flue gas outlet of the converter (1) is connected to the inlet of the first three-way valve (7a) via the evaporative cooler (3), the fan (5), and the flue gas composition analyzer (6) in sequence. One outlet of the first three-way valve (7a) is connected to the gas user (10) via the flue gas heat exchanger (8) and the converter cabinet (9) in sequence. The other outlet of the steam drum (12) is connected to the inlet of the second three-way valve (7b). One outlet of the second three-way valve (7b) is connected to the venting tower (13). The other outlet of the second three-way valve (7b) is connected to the venting tower (13) through the combustion furnace (11). The steam drum (12) is connected to the demineralized water source and the steam user through the demineralized water inlet pipe (12a) and the steam outlet pipe (12b) respectively. It is also connected to the lower end and the upper end of the heat exchange tube inside the combustion furnace (11) through the demineralized water outlet pipe (12c) and the steam inlet pipe (12d) respectively.
2. The converter flue gas waste heat and waste energy deep recovery system according to claim 1, characterized in that, Both the first three-way valve (7a) and the second three-way valve (7b) are electrically operated switching valves. The signal output terminal of the flue gas composition analyzer (6) is connected to the controller of the first three-way valve (7a) and the second three-way valve (7b).
3. A deep recovery system for waste heat and energy from converter flue gas according to claim 1 or 2, characterized in that, The evaporative cooler (3) is equipped with a cooling water nozzle, which is connected to a high-pressure water source through an electric control valve. A flue gas emission detector (14) is installed on the venting tower (13), and the signal output terminal of the flue gas emission detector (14) is connected to the controller of the electric control valve connected to the cooling water nozzle.
4. The converter flue gas waste heat and waste energy deep recovery system according to claim 3, characterized in that, The combustion furnace (11) has a burner at the bottom of its inner cavity. The burner is connected to the combustion gas outside the combustion furnace (11) through a combustion gas pipeline (11a) and to the combustion air outside the combustion furnace (11) through a combustion air pipeline (11b). The controller of the burner is connected to the signal output terminal of the flue gas composition analyzer (6).
5. The converter flue gas waste heat and waste energy deep recovery system according to claim 4, characterized in that, The flue gas heat exchanger (8) has multiple sets of hot water exchange pipes (8c) inside. The inlet end of the multiple sets of hot water exchange pipes (8c) is connected to the water source outside the flue gas heat exchanger (8) through a cold water inlet pipe (8a). The outlet end of the multiple sets of hot water exchange pipes (8c) is connected to the hot water user outside the flue gas heat exchanger (8) through a hot water outlet pipe (8b).
6. The converter flue gas waste heat and waste energy deep recovery system according to claim 5, characterized in that, An electrostatic precipitator (4) is installed on the converter flue between the evaporator (3) and the fan (5).
7. The converter flue gas waste heat and waste energy deep recovery system according to claim 6, characterized in that, The combustion-supporting gas is coke gas or natural gas.