Flue gas waste heat recovery device for zinc smelting flash furnace

Abstract

The utility model discloses a zinc smelting flash furnace flue gas waste heat recovery device which comprises a flue gas collection system, a heat exchanger and a heat cyclic utilization system, the heat exchanger is provided with a gas inlet, a gas outlet, a hot coal inlet and a hot coal outlet, the flue gas collection system is connected with the gas inlet of the heat exchanger, and the heat cyclic utilization system is connected with the gas outlet of the heat exchanger. A hot coal outlet of the heat exchanger is connected to a heat cyclic utilization system, the heat cyclic utilization system comprises a heating medium circulation system and a waste heat utilization system, and the waste heat utilization system is connected with the heating medium circulation system. The application can effectively recover flue gas waste heat generated in the zinc smelting process, reduce energy waste, reduce the production cost and improve the energy efficiency. In addition, through an integrated heating medium circulation and waste heat utilization system, the device can flexibly adapt to different industrial requirements, and has good economical efficiency and environmental benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery in metal smelting industry, and more specifically, to a zinc smelting flash furnace flue gas waste heat recovery device. Background Art

[0002] Flash furnaces used in zinc smelting emit large amounts of high-temperature flue gas, which contains a wealth of heat energy. If not recovered, this flue gas wastes energy and pollutes the environment. Currently, waste heat recovery technology in the zinc smelting industry is relatively inadequate, and a highly efficient flue gas waste heat recovery device is urgently needed to improve energy efficiency, reduce production costs, and minimize emissions. Utility Model Content

[0003] The purpose of this utility model is to provide a zinc smelting flash furnace flue gas waste heat recovery device that can effectively recover the flue gas waste heat generated during the zinc smelting process, reducing energy waste, lowering production costs, and improving energy efficiency. In addition, through an integrated heat medium circulation and waste heat utilization system, this device can flexibly adapt to different industrial needs and has good economic and environmental benefits.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0005] A zinc smelting flash furnace flue gas waste heat recovery device includes a flue gas collection system, a heat exchanger, and a heat recycling system. The flue gas collection system is a flue gas pipeline responsible for introducing the high-temperature flue gas discharged from the smelting flash furnace into the subsequent heat exchanger. One end of the flue gas pipeline is connected to the exhaust port of the smelting flash furnace, and the other end is connected to the air inlet of the heat exchanger.

[0006] The heat exchanger is provided with an air inlet, an air outlet, a hot coal inlet, and a hot coal outlet. The heat exchanger transfers the waste heat of the flue gas to the circulating heat medium (water or oil) through heat exchange. The air outlet of the heat exchanger is connected to an external flue gas exhaust system (such as a chimney), and the flue gas collection system is connected to the air inlet of the heat exchanger.

[0007] The hot coal outlet of the heat exchanger is connected to a heat circulation system, which includes a heat medium circulation system and a waste heat utilization system. The waste heat utilization system is connected to the heat medium circulation system.

[0008] As an improvement of the present invention, the heat exchanger is a shell and tube heat exchanger or a plate heat exchanger.

[0009] As an improvement of the present invention, the heat medium circulation system includes a heat medium pump and a return pipe. The inlet of the heat medium pump is connected to the heat medium outlet pipe of the heat exchanger, and the outlet of the heat medium pump is connected to the equipment that needs to be heated (such as a boiler, steam generator, etc.). The return pipe is connected to the hot coal inlet of the heat exchanger to lead the cooled heat medium back to the heat medium inlet of the heat exchanger.

[0010] As an improvement of the present invention, the waste heat utilization system includes a steam generator and a hot water system. The steam generator converts the heated heat medium into steam to supply the generator or other process needs; the hot water system uses the heat medium to heat water to supply the production process or heating system; the waste heat utilization system and the heat medium circulation system are an integrated device.

[0011] As an improvement of the present invention, the flue gas waste heat recovery device also includes a control system, which includes sensors, a controller, and a display screen. The sensors are installed in the flue gas collection system, the heat exchanger, and the heat recycling system. The sensors include temperature sensors, pressure sensors, and flow sensors. The sensors detect temperature, pressure, and flow respectively and send signals to the controller. Valves are provided on the pipelines of the flue gas collection system, the heat exchanger, and the heat recycling system. The controller is connected to the valve via a cable, and the display screen is connected to the controller.

[0012] The beneficial effects of the utility model are:

[0013] The zinc smelting flash furnace flue gas waste heat recovery device of the utility model effectively recovers waste heat from high-temperature flue gas, reduces energy waste, and improves overall energy efficiency. By recovering waste heat, the dependence on external energy in the production process is reduced, thereby reducing production costs. At the same time, waste gas emissions are reduced, environmental pollution is reduced, and environmental protection requirements are met. The integrated heat medium circulation and waste heat utilization system can adapt to different industrial needs and enhance the adaptability and flexibility of the system. The application is also provided with a control system to achieve real-time monitoring and automatic adjustment, thereby improving the reliability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 This is a framework diagram of the present utility model.

[0016] List of Figure Symbols:

[0017] 1. Flue gas collection system; 2. Heat exchanger; 3. Heat medium pump; 4. Return pipe; 5. Steam generator; 6. Hot water system; 7. Smelting flash furnace; 8. Flue gas exhaust system; 9. Valve. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0019] Furthermore, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model in their respective contexts.

[0020] As shown in the figure, the zinc smelting flash furnace flue gas waste heat recovery device described in the present invention includes a flue gas collection system 1, a heat exchanger 2, and a heat recycling system. The flue gas collection system 1 is a flue gas pipeline responsible for introducing the high-temperature flue gas discharged from the smelting flash furnace 7 into the subsequent heat exchanger 2. One end of the flue gas pipeline is connected to the exhaust port of the smelting flash furnace 7, and the other end is connected to the air inlet of the heat exchanger 2.

[0021] The heat exchanger 2 is provided with an air inlet, an air outlet, a hot coal inlet, and a hot coal outlet. The heat exchanger 2 transfers the waste heat of the flue gas to the circulating heat medium (water or oil) through heat exchange. The air outlet of the heat exchanger 2 is connected to an external flue gas exhaust system 8 (such as a chimney). The flue gas collection system 1 is connected to the air inlet of the heat exchanger 2.

[0022] The hot coal outlet of the heat exchanger 2 is connected to a heat circulation system, which includes a heat medium circulation system and a waste heat utilization system. The waste heat utilization system is connected to the heat medium circulation system.

[0023] The heat exchanger 2 described in the present invention is a shell and tube heat exchanger 2 or a plate heat exchanger 2 .

[0024] The heat medium circulation system described in the present invention includes a heat medium pump 3 and a return pipe 4. The inlet of the heat medium pump 3 is connected to the heat medium outlet pipe of the heat exchanger 2, and the outlet of the heat medium pump 3 is connected to the equipment that needs to be heated (such as a boiler, a steam generator 5, etc.). The return pipe 4 is connected to the hot coal inlet of the heat exchanger 2 to guide the cooled heat medium back to the heat medium inlet of the heat exchanger 2.

[0025] The waste heat utilization system described in the present invention includes a steam generator 5 and a hot water system 6. The steam generator 5 converts the heated heat medium into steam to supply the generator or other process needs; the hot water system 6 uses the heat medium to heat water to supply the production process or heating system; the waste heat utilization system and the heat medium circulation system are an integrated device.

[0026] The flue gas waste heat recovery device described in the present invention also includes a control system, which includes sensors, a controller, and a display screen. The sensors are installed in the flue gas collection system 1, the heat exchanger 2, and the heat recycling system. The sensors include temperature sensors, pressure sensors, and flow sensors. The sensors detect temperature, pressure, and flow respectively and send signals to the controller. A valve 9 is provided on the pipeline of the flue gas collection system 1, the heat exchanger 2, and the heat recycling system. The controller is connected to the valve 9 via a cable, and the display screen is connected to the controller.

[0027] The utility model discloses a zinc smelting flash furnace flue gas waste heat recovery device, the specific working process is as follows:

[0028] High-temperature flue gas emitted from the smelting flash furnace 7 is directed into a flue gas collection system 1 via a flue gas duct. One end of the duct is connected to the furnace's exhaust port, and the other end is connected to the air inlet of heat exchanger 2. The flue gas enters heat exchanger 2, which is equipped with an air inlet, an air outlet, a heat medium inlet, and a heat medium outlet. Through the heat exchange process, the waste heat in the flue gas is transferred to the circulating heat medium (water or oil). The outlet of heat exchanger 2 directs the cooled flue gas into an external flue gas exhaust system 8 (such as a chimney), completing the flue gas treatment.

[0029] The heated heat medium enters the heat medium circulation system through the heat medium outlet. This system includes a heat medium pump 3 and a return pipe 4. The inlet of the heat medium pump 3 is connected to the heat medium outlet of the heat exchanger 2, and the heat medium is delivered to the equipment requiring heating (such as a boiler, steam generator 5, etc.). After releasing heat energy in the equipment, the heated heat medium returns to the heat medium inlet of the heat exchanger 2 through the return pipe 4, completing the cycle.

[0030] The waste heat utilization system in the heat recycling system uses the heated heat medium to convert energy. Specifically, the steam generator 5 converts the heat medium into steam to supply the generator or other process needs; the hot water system 6 uses the heat medium to heat water to meet the needs of the production process or heating system.

[0031] The system is equipped with a control system, including temperature, pressure, and flow sensors. These sensors monitor the status of various system components in real time and send signals to a controller. The controller adjusts the system's operating state based on the sensor data. The controller, connected to valves 9 on the pipeline via cables, ensures optimal system operation and provides real-time data feedback on a display screen.

[0032] This workflow ensures the efficient recovery and utilization of flue gas waste heat, realizes energy reuse and economic production, and has significant industrial application value.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] The accompanying drawings merely illustrate the technical concept of the present invention and cannot limit the scope of protection of the present invention by this shape. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications all fall within the scope of protection of the claims of the present invention.

Claims

1. A zinc smelting flash furnace flue gas waste heat recovery device, comprising a flue gas collection system, a heat exchanger, and a heat recycling system, characterized in that: The heat exchanger is provided with an air inlet, an air outlet, a hot coal inlet, and a hot coal outlet. The flue gas collection system is connected to the air inlet of the heat exchanger, and the hot coal outlet of the heat exchanger is connected to a heat circulation system. The heat circulation system includes a heat medium circulation system and a waste heat utilization system. The waste heat utilization system is connected to the heat medium circulation system.

2. The zinc smelting flash furnace flue gas waste heat recovery device according to claim 1, characterized in that: The heat exchanger is a shell and tube heat exchanger or a plate heat exchanger.

3. The zinc smelting flash furnace flue gas waste heat recovery device according to claim 1, characterized in that: The heat medium circulation system includes a heat medium pump and a return pipe. The inlet of the heat medium pump is connected to the heat medium outlet pipe of the heat exchanger, and the return pipe is connected to the hot coal inlet of the heat exchanger.

4. The zinc smelting flash furnace flue gas waste heat recovery device according to claim 3, characterized in that: The waste heat utilization system includes a steam generator and a hot water system, and the waste heat utilization system and the heat medium circulation system are an integrated device.

5. The zinc smelting flash furnace flue gas waste heat recovery device according to any one of claims 1 to 4, characterized in that: The flue gas waste heat recovery device also includes a control system, which includes sensors, a controller, and a display screen. The sensors are installed in the flue gas collection system, the heat exchanger, and the heat recycling system. The sensors include temperature sensors, pressure sensors, and flow sensors. The sensors detect temperature, pressure, and flow respectively and send signals to the controller. Valves are provided on the pipelines of the flue gas collection system, the heat exchanger, and the heat recycling system. The controller is connected to the valves via cables, and the display screen is connected to the controller.

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