A solid thermal storage device for flue gas waste heat peak shaving

Abstract

This utility model discloses a solid-state thermal storage device for peak shaving of flue gas waste heat, belonging to the technical field of solid-state thermal storage devices. It includes a thermal storage body, with a primary recovery device fixedly connected to the lower left side of the body, and a secondary recovery device installed inside the body. This solid-state thermal storage device for peak shaving of flue gas utilizes a primary and secondary recovery device. Through water heat exchange followed by solid-state heat exchange, multi-stage heat absorption is achieved, fully absorbing heat from the flue gas and improving the thermal storage effect, thus fully utilizing the heat from the flue gas. Multiple filters clean the flue gas, and the water flow within the filters causes vibration of the filter screens on the side of the coiled water pipes during heat exchange, dislodging dust and preventing blockage, thus reducing maintenance efficiency. The foamed aluminum particles provide more uniform heat absorption, further improving the thermal storage effect.

Description

Technical Field

[0001] This utility model relates to the technical field of solid heat storage devices, and more specifically, to a solid heat storage device for flue gas waste heat peak regulation. Background Technology

[0002] In industrial production processes such as steel, chemical, and power generation, large quantities of low- to medium-temperature flue gas with temperatures ranging from 200 to 800°C are generated. Direct emission of this flue gas not only results in severe energy waste but also exacerbates environmental thermal pollution due to the heat it carries. Solid-state thermal energy storage devices for flue gas waste heat peak shaving are an innovative energy solution combining waste heat recovery and thermal storage technologies. They are primarily used for the recovery and reuse of industrial flue gas waste heat and release the stored heat energy during peak electricity demand periods, thereby achieving optimized energy allocation.

[0003] Currently, there is a lack of tiered utilization design for waste heat recovery from medium and low temperature flue gas. Often, only waste heat in a single temperature range is recovered, resulting in inefficient utilization of high-grade waste heat and insufficient recovery of low-grade waste heat. At the same time, industrial flue gas often contains impurities such as dust, and existing recovery devices are prone to ash accumulation and blockage, leading to a rapid decline in heat exchange efficiency and increasing the frequency of equipment maintenance and operating costs. Utility Model Content

[0004] The main purpose of this invention is to provide a solid heat storage device for flue gas waste heat peak regulation, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A solid thermal storage device for flue gas waste heat peak shaving includes a thermal storage body, a primary recovery device is fixedly connected to the lower left end of the thermal storage body, and a secondary recovery device is provided inside the thermal storage body. The thermal storage unit includes a bottom frame, a fixed housing is fixedly connected to the upper right side of the bottom frame, and rotating slots are provided at both the upper and lower ends of the fixed housing. A gas exhaust port is fixedly connected to the top of the fixed housing, and the rotating slots at the upper and lower ends are connected to each other. The top of the rotating slots is connected to the gas exhaust port. A hot water storage tank is fixedly connected to the upper left side of the bottom frame. A primary recovery device is fixedly installed at the lower left side of the bottom frame. A water circulation pump is fixedly connected to the top of the primary recovery device. A heat exchanger is fixedly connected to one end of the water circulation pump, and the heat exchanger is connected to the hot water storage tank.

[0006] Preferably, the secondary heat recovery device includes two waste heat recovery boxes, which are rotatably installed inside the upper and lower rotating slots respectively. One end of each waste heat recovery box is fixedly connected to a pulley, and a transmission belt is sleeved on the outer surface of the two pulleys. A rotating motor is fixedly connected to one side of each pulley, and the rotating motor is fixedly installed on the side of the fixed box body.

[0007] Preferably, the waste heat recovery box includes a rotating box, a fixed inner box is fixedly connected inside the rotating box, the fixed inner box has a cavity inside, multiple vent pipes are fixedly connected between the rotating box and the fixed inner box, the fixed inner box is connected to the outside of the rotating box through the vent pipes, and aluminum foam particles are placed between the rotating box and the fixed inner box.

[0008] Preferably, the primary recycling device includes a fixed pipe, the bottom of which is fixedly connected to an ash collection base, the bottom of which is fixedly connected to a discharge nozzle, and a cleaning cover is threaded onto the outer surface of the discharge nozzle. An air inlet pipe is fixedly connected to the left end of the fixed pipe, and an exhaust pipe is fixedly connected to the right end of the fixed pipe. A water inlet pipe and a drain pipe are fixedly connected to the top of the fixed pipe, and multiple tray-type water pipes are fixedly connected to the bottom of the water inlet pipe and the drain pipe. A filter screen is fixedly connected to the side of each tray-type water pipe, and the filter screen is located on the side near the air inlet pipe.

[0009] Preferably, the right end of the exhaust pipe is connected to the bottom of the rotating groove, and the water inlet pipe and the water outlet pipe are respectively connected to the water circulation pump and the heat exchanger.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a primary recovery device and a secondary recovery device, the flue gas first undergoes water heat exchange and then solid heat exchange to achieve multi-stage heat absorption, fully absorb heat from the flue gas, improve the heat storage effect of the device, and make full use of the heat of the flue gas. 2. The flue gas is filtered through multiple filter screens to achieve flue gas cleanliness. The water flow inside the filter screens allows the coiled water pipes to exchange heat. At the same time, the water flow causes the filter screens on the side of the coiled water pipes to vibrate, causing the dust on the filter screens to fall off, thus preventing the flue gas from clogging and reducing maintenance efficiency. 3. The two waste heat recovery boxes rotate inside the rotating slots at the upper and lower ends of the fixed box body, which causes the aluminum foam particles to turn over, making the heat absorption of the aluminum foam particles more uniform and improving the heat storage effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the heat storage unit of this utility model; Figure 3 This is a schematic diagram of the thermal storage body structure of this utility model; Figure 4 This is a schematic diagram of the secondary recycling device of this utility model; Figure 5 This is a schematic diagram of the waste heat recovery box structure of this utility model; Figure 6 This is a schematic diagram of the primary recycling device of this utility model.

[0012] The attached diagram is labeled as follows: 1. Heat storage unit; 2. Primary recovery device; 3. Secondary recovery device; 11. Bottom frame; 12. Fixed box; 13. Rotating trough; 14. Gas exhaust port; 15. Water circulation pump; 16. Heat exchanger; 17. Hot water storage tank; 21. Fixed pipe; 22. Ash collection base; 23. Cleaning cover; 24. Air inlet pipe; 25. Exhaust pipe; 26. Water inlet pipe; 27. Filter screen; 28. Drain pipe; 31. Waste heat recovery box; 32. Pulley; 33. Drive belt; 34. Rotating motor; 311. Rotating box; 312. Fixed inner box; 313. Vent pipe; 314. Aluminum foam particles. Detailed Implementation

[0013] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0014] As attached Figure 1 To be continued Figure 6 As shown, an embodiment of this utility model provides a solid heat storage device for flue gas waste heat peak shaving, including a heat storage body 1, a primary recovery device 2 and a secondary recovery device 3. The lower end of the left side of the heat storage body 1 is fixedly connected to the primary recovery device 2, and the secondary recovery device 3 is disposed inside the heat storage body 1. like Figure 3 As shown, the heat storage unit 1 includes a bottom frame 11. A fixed box 12 is fixedly connected to the upper right side of the bottom frame 11. Rotating grooves 13 are provided at both the upper and lower ends inside the fixed box 12. A gas exhaust port 14 is fixedly connected to the top of the fixed box 12. The rotating grooves 13 at the upper and lower ends are connected. The top of the rotating grooves 13 is connected to the gas exhaust port 14. A hot water storage tank 17 is fixedly connected to the upper left side of the bottom frame 11. A primary recovery device 2 is fixedly installed at the lower left side of the bottom frame 11. A water circulation pump 15 is fixedly connected to the top of the primary recovery device 2. A heat exchanger 16 is fixedly connected to one end of the water circulation pump 15. The heat exchanger 16 is connected to the hot water storage tank 17.

[0015] like Figure 4As shown, the secondary heat recovery device 3 includes two waste heat recovery boxes 31. The two waste heat recovery boxes 31 are rotatably installed inside the upper and lower rotating slots 13 respectively. One end of each waste heat recovery box 31 is fixedly connected to a pulley 32. The outer surface of the two pulleys 32 is fitted with a transmission belt 33. A rotating motor 34 is fixedly connected to one side of the pulley 32. The rotating motor 34 is fixedly installed on the side of the fixed box body 12.

[0016] Specifically, the rotating motor 34 controls the pulley 32 to rotate, and through the transmission belt 33, the two waste heat recovery boxes 31 rotate inside the rotating grooves 13 at the upper and lower ends of the fixed box body 12, thereby causing the aluminum foam particles 314 to turn over, making the heat absorption of the aluminum foam particles 314 more uniform and improving the heat absorption effect of the aluminum foam particles 314.

[0017] like Figure 5 As shown, the waste heat recovery box 31 includes a rotating box 311, and a fixed inner box 312 is fixedly connected inside the rotating box 311. The fixed inner box 312 has a cavity inside. Multiple vent pipes 313 are fixedly connected between the rotating box 311 and the fixed inner box 312. The fixed inner box 312 is connected to the outside of the rotating box 311 through the vent pipes 313. Foamed aluminum particles 314 are placed between the rotating box 311 and the fixed inner box 312.

[0018] By setting aluminum foam particles 314, which are lightweight and have a high heat absorption effect, it is easy to achieve the heat storage effect of solid. Using the vent pipe 313, the flue gas passes through the lower end of the waste heat recovery box 31, through the vent pipe 313, and is discharged through the gas exhaust port 14, thus realizing the heat storage of aluminum foam particles 314.

[0019] like Figure 6 As shown, the primary recycling device 2 includes a fixed pipe 21 and a filter screen 27. The bottom of the fixed pipe 21 is fixedly connected to a dust collection base 22. The bottom of the dust collection base 22 is fixedly connected to a discharge nozzle, and a cleaning cover 23 is threaded on the outer surface of the discharge nozzle. The left end of the fixed pipe 21 is fixedly connected to an air inlet pipe 24, and the right end of the fixed pipe 21 is fixedly connected to an exhaust pipe 25. The top of the fixed pipe 21 is fixedly connected to a water inlet pipe 26 and a drain pipe 28. The bottom of the water inlet pipe 26 and the drain pipe 28 are fixedly connected to multiple coiled water pipes. A filter screen 27 is fixedly connected to the side of the coiled water pipes. The filter screen 27 is located on the side close to the air inlet pipe 24.

[0020] The right end of the exhaust pipe 25 is connected to the bottom of the rotating groove 13, and the water inlet pipe 26 and the drain pipe 28 are connected to the water circulation pump 15 and the heat exchanger 16, respectively.

[0021] Specifically, the flue gas is filtered through multiple filter screens 27 to achieve flue gas cleaning. In addition, the water circulation pump 15 causes water to flow through the inlet pipe 26, through the inside of the coiled water pipe, and through the drain pipe 28 into the heat exchanger 16. After heat exchange, the waste heat is stored inside the hot water storage tank 17. Furthermore, the flow of water inside the filter screens 27 causes the coiled water pipe to exchange heat, and at the same time, the flow of water causes the filter screens 27 on the side of the coiled water pipe to vibrate, causing the dust on the filter screens 27 to fall off and fall into the dust collection base 22. By opening the cleaning cover 23, the dust can be discharged through the discharge nozzle.

[0022] The working process of this utility model is as follows: During use, flue gas passes through multiple filters 27 via the inlet pipe 24 and enters the rotating trough 13 via the exhaust pipe 25. At this time, water flows into the heat exchanger 16 after heat exchange by the water circulation pump 15. After heat exchange, the residual heat is stored in the hot water storage tank 17. During this process, the flue gas is filtered by multiple filters 27 to achieve flue gas cleaning. In addition, water flows through the inlet pipe 26 through the inside of the coiled water pipe and enters the heat exchanger 16 via the drain pipe 28. As the water flows inside the coiled water pipe, the coiled water pipe exchanges heat. At the same time, the flow causes the filter 27 on the side of the coiled water pipe to vibrate, causing the dust on the filter 27 to fall off and fall into the dust collection base 22. The dust can be discharged through the discharge nozzle by opening the cleaning cover 23. The purified flue gas enters the lower end of the rotating groove 13 through the exhaust pipe 25. The flue gas is discharged from the gas discharge port 14 through the rotating groove 13. The rotating motor 34 controls the pulley 32 to rotate. Through the transmission belt 33, the two waste heat recovery boxes 31 rotate inside the rotating groove 13 at the upper and lower ends of the fixed box 12, which causes the aluminum foam particles 314 to turn over. The flue gas enters the interior of the fixed inner box 312 through the vent pipe 313 through the lower end of the waste heat recovery box 31, and is discharged from the gas discharge port 14 through the vent pipe 313. This makes the heat absorption of the aluminum foam particles 314 more uniform and realizes the heat storage of the aluminum foam particles 314.

[0023] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solid heat storage device for flue gas waste heat peak shaving, comprising a heat storage body (1), characterized in that: The lower left side of the thermal storage unit (1) is fixedly connected to a primary recovery device (2), and a secondary recovery device (3) is provided inside the thermal storage unit (1). The heat storage unit (1) includes a bottom frame (11). A fixed box (12) is fixedly connected to the upper right side of the bottom frame (11). Rotating grooves (13) are provided at both the upper and lower ends inside the fixed box (12). A gas exhaust port (14) is fixedly connected to the top of the fixed box (12). The rotating grooves (13) at the upper and lower ends are connected. The top of the rotating grooves (13) is connected to the gas exhaust port (14). A hot water storage tank (17) is fixedly connected to the upper left side of the bottom frame (11). The primary recovery device (2) is fixedly installed at the lower left side of the bottom frame (11). A water circulation pump (15) is fixedly connected to the top of the primary recovery device (2). A heat exchanger (16) is fixedly connected to one end of the water circulation pump (15). The heat exchanger (16) is connected to the hot water storage tank (17).

2. A solid thermal storage device for flue gas waste heat peak shaving according to claim 1, characterized in that: The secondary heat recovery device (3) includes two waste heat recovery boxes (31). The two waste heat recovery boxes (31) are rotatably installed inside the upper and lower rotating slots (13). One end of each of the two waste heat recovery boxes (31) is fixedly connected to a pulley (32). A transmission belt (33) is sleeved on the outer surface of the two pulleys (32). A rotating motor (34) is fixedly connected to one side of the pulley (32). The rotating motor (34) is fixedly installed on the side of the fixed box body (12).

3. The flue gas waste heat peak shaving solid heat storage device according to claim 2, characterized in that: The waste heat recovery box (31) includes a rotating box (311), and a fixed inner box (312) is fixedly connected inside the rotating box (311). The fixed inner box (312) has a cavity inside. Multiple vent pipes (313) are fixedly connected between the rotating box (311) and the fixed inner box (312). The fixed inner box (312) is connected to the outside of the rotating box (311) through the vent pipes (313). Foamed aluminum particles (314) are placed between the rotating box (311) and the fixed inner box (312).

4. The flue gas waste heat peak shaving solid heat storage device according to claim 1, characterized in that: The primary recycling device (2) includes a fixed pipe (21), the bottom of which is fixedly connected to a dust collection base (22), the bottom of which is fixedly connected to a discharge nozzle, and a cleaning cover (23) is threaded on the outer surface of the discharge nozzle. The left end of the fixed pipe (21) is fixedly connected to an air inlet pipe (24), the right end of which is fixedly connected to an exhaust pipe (25), the top of the fixed pipe (21) is fixedly connected to a water inlet pipe (26) and a drain pipe (28), the bottom of which is fixedly connected to multiple tray-type water pipes, and the side of which is fixedly connected to a filter screen (27), which is located on the side close to the air inlet pipe (24).

5. The solid heat storage device for flue gas waste heat peak shaving according to claim 4, characterized in that: The right end of the exhaust pipe (25) is connected to the bottom of the rotating groove (13), and the water inlet pipe (26) and the drain pipe (28) are connected to the water circulation pump (15) and the heat exchanger (16) respectively.

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