A heat exchange device for recycling lead smelting furnace waste heat

Abstract

This utility model discloses a heat exchange device for waste heat recovery in a recycled lead smelting furnace, relating to the field of waste heat utilization. It includes a heat exchange cylinder and a fixed support. Sealing round end plates are sealed to both ends of the heat exchange cylinder. A first heat exchange tube group and a second heat exchange tube group are fixedly connected between the sealing round end plates. A bidirectional air inlet / outlet device and a gas disturbance chamber device are sealed and fixedly connected to the outer sides of the two sealing round end plates. The bidirectional air inlet / outlet device includes an air inlet / outlet chamber and a three-way air inlet pipe. The air inlet / outlet chamber is divided into a first air chamber and a second air chamber by a fixed partition. The first and second air chambers are respectively connected to one interface of the three-way air inlet pipe. The first air chamber is connected to the left end of the first heat exchange tube group, and the second air chamber is connected to the left end of the second heat exchange tube group. The right ends of the first and second heat exchange tube groups are connected to the gas disturbance chamber device. This device can achieve the expansion and contraction of accumulated ash due to heat and airflow disturbance during the heat exchange process, allowing it to fall off the tube wall easily and quickly, thus improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat utilization, specifically relating to a heat exchange device for waste heat recovery from a recycled lead smelting furnace. Background Technology

[0002] Lead smelting furnaces generate large amounts of high-temperature flue gas during operation, containing significant thermal energy. This waste heat is typically recovered and reused to generate steam, heat process water, or preheat combustion air, thereby improving overall energy efficiency. However, because the flue gas contains large amounts of low-melting-point substances such as lead dust, zinc oxide, chlorides, fluorides, and sulfates, these substances soften, melt, or undergo chemical reactions when the flue gas temperature decreases, adhering to the walls of heat exchange tubes or the surface of fins. This leads to problems such as ash accumulation, slagging, and blockage in the heat exchange devices of the waste heat recovery equipment.

[0003] After existing waste heat recovery equipment has been running for a period of time, metallurgical fine dust in the flue gas accumulates in the boiler heat exchange tubes and partially blocks the flue gas flow section of the tubes, causing a sharp drop in heat exchange efficiency. It is necessary to shut down the machine regularly for cooling and then carry out ash removal operations. However, ash removal is difficult and time-consuming, causing long-term production interruptions, greatly reducing production efficiency and causing great trouble to production. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a heat exchange device for waste heat recovery from a recycled lead smelting furnace.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0006] A heat exchange device for waste heat recovery in a recycled lead smelting furnace includes a heat exchange cylinder and a fixed support. Sealing end plates are sealed to both ends of the heat exchange cylinder. A first heat exchange tube group and a second heat exchange tube group are fixedly connected between the sealing end plates. A bidirectional gas inlet / outlet device and a gas disturbance chamber device are sealed and fixedly connected to the outer sides of the two sealing end plates. The bidirectional gas inlet / outlet device includes a gas inlet / outlet chamber and a three-way gas inlet pipe. The gas inlet / outlet chamber is divided into a first gas chamber and a second gas chamber by a fixed partition. The first and second gas chambers are respectively connected to one interface of the three-way gas inlet pipe. The first gas chamber is connected to the left end of the first heat exchange tube group, and the second gas chamber is connected to the left end of the second heat exchange tube group. The right ends of the first and second heat exchange tube groups are connected to the gas disturbance chamber device.

[0007] As a further provision of the above scheme, the heat exchange cylinder is fixedly connected with staggered support partitions, which are fixedly connected to the first heat exchange tube group and the second heat exchange tube group, and serve to support and fix the first heat exchange tube group and the second heat exchange tube group. The upper and lower opposite sides of both ends of the heat exchange cylinder are connected with inlet valve devices and outlet valve devices.

[0008] As a further provision of the above scheme, the first air chamber and the second air chamber are respectively equipped with exhaust valve devices, and the connection between the first air chamber and the second air chamber and the three-way air inlet pipe is equipped with an air inlet valve device. The exhaust valve device and the air inlet valve device cooperate with each other, and the first air chamber and the second air chamber can be used alternately as air inlet chamber and air outlet chamber to achieve the purpose of bidirectional air inlet and outlet.

[0009] As a further provision of the above scheme, the gas disturbance chamber device includes a disturbance chamber, which is connected to the first heat exchange tube group and the second heat exchange tube group. The disturbance chamber is a cylindrical chamber body, and a piston plate is slidably connected inside the disturbance chamber. A mounting bracket is fixedly connected to the outer end face of the disturbance chamber, and a vibration device is fixedly connected to the mounting bracket. A connecting rod is connected to the vibration output end of the vibration device.

[0010] As a further feature of the above scheme, a spring column device is fixedly connected vertically to the right end face of the piston plate, the spring column device is fixedly connected to the outer end face of the disturbance chamber, and the piston plate is fixedly connected to the connecting rod.

[0011] This utility model has the following beneficial effects:

[0012] The inlet and outlet valves work together to add cooling water into the heat exchange cylinder. The cooling water contacts the first and second heat exchange tube groups for heat exchange. The exhaust valve and inlet valve work together, allowing the first and second air chambers to be used alternately as air inlet and exhaust chambers, enabling bidirectional flow of flue gas within the first and second heat exchange tube groups. During the heat exchange process, the accumulated ash adhering to the inner walls of the first and second heat exchange tube groups is simultaneously subjected to cold and heat treatment. At the same time, the vibration device drives the piston plate to vibrate, disturbing the flue gas. The thermal expansion and contraction of the ash, combined with the airflow disturbance, causes it to fall off the tube wall, achieving simple and quick online ash removal without stopping the machine, greatly improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0014] Figure 2 This is a cross-sectional schematic diagram of the bidirectional air inlet and outlet device of this utility model;

[0015] Figure 3 This is a cross-sectional schematic diagram of the gas disturbance chamber device of this utility model.

[0016] 1. Heat exchanger cylinder; 2. Fixed bracket; 3. Sealing round end plate; 4. First heat exchanger tube assembly; 5. Second heat exchanger tube assembly; 6. Support partition; 7. Water inlet valve device; 8. Water outlet valve device; 9. Two-way air inlet and outlet device; 901. Air inlet and outlet chamber; 9011. First air chamber; 9012. Second air chamber; 902. Fixed partition; 903. Air inlet valve device; 904. Three-way air inlet pipe; 10. Gas disturbance chamber device; 1001. Disturbance chamber; 1002. Mounting bracket; 1003. Vibration device; 1004. Connecting rod; 1005. Piston plate; 1006. Spring column device; 11. Exhaust valve device. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-3 This application will be described in detail with reference to the embodiments.

[0019] A heat exchange device for waste heat recovery in a recycled lead smelting furnace includes a heat exchange cylinder 1 and a fixed support 2. Sealing round end plates 3 are sealed to both ends of the heat exchange cylinder 1. A first heat exchange tube group 4 and a second heat exchange tube group 5 are fixedly connected between the sealing round end plates 3. A bidirectional gas inlet / outlet device 9 and a gas disturbance chamber device 10 are sealed and fixedly connected to the outer sides of the two sealing round end plates 3. The bidirectional gas inlet / outlet device 9 includes a gas inlet / outlet chamber 901 and a three-way gas inlet pipe 904. The gas inlet / outlet chamber 901 is divided into a first gas chamber 9011 and a second gas chamber 9012 by a fixed partition 902. The first gas chamber 9011 and the second gas chamber 9012 are respectively connected to one interface of the three-way gas inlet pipe 904. The first gas chamber 9011 is connected to the left end of the first heat exchange tube group 4, and the second gas chamber 9012 is connected to the left end of the second heat exchange tube group 5. The right ends of the first heat exchange tube group 9011 and the second heat exchange tube group 9012 are connected to the gas disturbance chamber device 10.

[0020] like Figure 1 As shown, a support partition 6 is fixedly connected inside the heat exchange cylinder 1, which is arranged vertically and horizontally. The support partition 6 is fixedly connected to the first heat exchange tube group 4 and the second heat exchange tube group 5, and serves to support and fix the first heat exchange tube group 4 and the second heat exchange tube group 5. Water inlet valve device 7 and water outlet valve device 8 are connected to the upper and lower opposite sides of both ends of the heat exchange cylinder 1.

[0021] like Figure 2 As shown, the first air chamber 9011 and the second air chamber 9012 are respectively provided with exhaust valve devices 11. The connection between the first air chamber 9011 and the second air chamber 9012 and the three-way air inlet pipe 904 is provided with an air inlet valve device 903. The exhaust valve device 11 and the air inlet valve device 903 cooperate with each other, and the first air chamber 9011 and the second air chamber 9012 are used alternately as air inlet chambers and exhaust chambers to achieve the purpose of bidirectional air inlet and outlet.

[0022] like Figure 3 As shown, the gas disturbance chamber device 10 includes a disturbance chamber 1001, which is connected to the first heat exchange tube group 4 and the second heat exchange tube group 5. The disturbance chamber 1001 is a cylindrical chamber. A piston plate 1005 is slidably connected inside the disturbance chamber 1001. A mounting bracket 1002 is fixedly connected to the outer end face of the disturbance chamber 1001. A vibration device 1003 is fixedly connected to the mounting bracket 1002. A connecting rod 1004 is connected to the vibration output end of the vibration device 1003. A spring column device 1006 is fixedly connected vertically to the right end face of the piston plate 1005. The spring column device 1006 is fixedly connected to the outer end face of the disturbance chamber 1001. The piston plate 1005 is fixedly connected to the connecting rod 1004.

[0023] The working process of this utility model is as follows: The inlet valve device 7 and the outlet valve device 8 cooperate to add cooling water into the heat exchange cylinder 1. The cooling water contacts the first heat exchange tube group 4 and the second heat exchange tube group 5 for heat exchange. The exhaust valve device 11 on the first air chamber 9011 is closed, and the inlet valve device 903 on the first air chamber 9011 is opened. The exhaust valve device 11 on the second air chamber 9012 is opened, and the inlet valve device 903 on the second air chamber 9012 is closed. Cooling water is introduced into the first air chamber 9012 through the three-way inlet pipe 904. Flue gas is added to the gas chamber 9011. The flue gas passes through the first heat exchange tube group 4, enters the disturbance chamber 1001, and then passes through the second heat exchange tube group 5 to enter the second gas chamber 9012. It is discharged from the exhaust valve device 11 on the second gas chamber 9012. The flue gas exchanges heat when it flows through the first heat exchange tube group 4 and the second heat exchange tube group 5. Dust accumulates on the inner wall of the pipe. As the temperature of the flue gas gradually decreases when it flows through the first heat exchange tube group 4 and the second heat exchange tube group 5, the temperature of the dust accumulation at different locations is also different.

[0024] After a certain period of operation, the exhaust valve device 11 on the first air chamber 9011 opens, and the air inlet valve device 903 on the first air chamber 9011 closes. The exhaust valve device 11 on the second air chamber 9012 closes, and the air inlet valve device 903 on the second air chamber 9012 opens. Flue gas is added to the second air chamber 9012 through the three-way air inlet pipe 904. The flue gas passes through the second heat exchange tube group 5, enters the disturbance chamber 1001, and then enters the first air chamber 9011 through the first heat exchange tube group 4. It is discharged from the exhaust valve device 11 on the first air chamber 9011. At this time, the flue gas flow direction is reversed from before, and the ash is subjected to cold and heat treatment. While the ash expands and contracts with heat, the vibration device 1003 drives the piston plate 1005 to vibrate and disturb the flue gas. The ash falls off the pipe wall, achieving the purpose of ash removal.

[0025] Although the temperature difference between the first heat exchanger tube group 4 and the second heat exchanger tube group 5 is smaller at the end closer to the piston plate 1005, the corresponding airflow disturbance effect is stronger, which compensates for each other and ensures the dust removal effect.

[0026] The vibration device 1003 is activated only during the dust removal process and locked at other times. At this time, the connecting rod 1004 is locked to fix and support the piston plate, so as to avoid unnecessary impact on the equipment due to unstable airflow during heat exchange.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

Claims

1. A heat exchange device for waste heat recovery from a recycled lead smelting furnace, comprising a heat exchange cylinder and a fixed support, wherein sealing round end plates are sealed to both ends of the heat exchange cylinder, characterized in that, A first heat exchange tube group and a second heat exchange tube group are fixedly connected between the sealing round end plates. A bidirectional air inlet / outlet device and a gas disturbance chamber device are fixedly connected to the outer side of the two sealing round end plates. The bidirectional air inlet / outlet device includes an air inlet / outlet chamber and a three-way air inlet pipe. The air inlet / outlet chamber is divided into a first air chamber and a second air chamber by a fixed partition. The first air chamber and the second air chamber are respectively connected to one interface of the three-way air inlet pipe. The first air chamber is connected to the left end of the first heat exchange tube group, and the second air chamber is connected to the left end of the second heat exchange tube group. The right ends of the first heat exchange tube group and the second heat exchange tube group are connected to the gas disturbance chamber device.

2. The heat exchange device for waste heat recovery from a recycled lead smelting furnace according to claim 1, characterized in that, The heat exchange cylinder is fixedly connected with staggered support partitions, which are fixedly connected to the first heat exchange tube group and the second heat exchange tube group. The upper and lower sides of both ends of the heat exchange cylinder are connected with inlet valve devices and outlet valve devices.

3. The heat exchange device for waste heat recovery from a recycled lead smelting furnace according to claim 1, characterized in that, The first and second air chambers are each equipped with an exhaust valve device, and an intake valve device is provided at the connection between the first and second air chambers and the three-way intake pipe.

4. The heat exchange device for waste heat recovery from a recycled lead smelting furnace according to claim 1, characterized in that, The gas disturbance chamber device includes a disturbance chamber, which is connected to the first heat exchange tube group and the second heat exchange tube group. The disturbance chamber is a cylindrical chamber body. A piston plate is slidably connected inside the disturbance chamber. A mounting bracket is fixedly connected to the outer end face of the disturbance chamber. A vibration device is fixedly connected to the mounting bracket. A connecting rod is connected to the vibration output end of the vibration device.

5. The heat exchange device for waste heat recovery from a recycled lead smelting furnace according to claim 4, characterized in that, A spring column device is fixedly connected vertically to the right end face of the piston plate. The spring column device is fixedly connected to the outer end face of the disturbance chamber. The piston plate is fixedly connected to the connecting rod.

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