Waste heat recovery device based on industrial boiler

Abstract

The utility model discloses a waste heat recovery device based on an industrial boiler, which comprises a filter tank and a water storage tank fixedly connected to the right end of the filter tank. Sewage in an industrial boiler enters the filter tank through the water inlet pipe, impurities in the sewage can be effectively removed after the sewage is filtered by the two filter plates, the filtered water source enters the first annular heat exchange pipe through the first connecting pipe, the water source in the water storage tank is heated by the waste heat of the sewage, the primary recovery of the waste heat of the sewage is realized, and the energy utilization rate is improved; then the water source can be discharged outwards through a water outlet pipe, water vapor generated by heating of the water source in the water storage tank enters a second annular heat exchange pipe through a second connecting pipe, objects on the drying frame can be dried, waste heat is further recycled, and finally the water vapor is discharged through an air outlet pipe; and heat waste and environmental pollution caused by direct discharge of high-temperature sewage are avoided, meanwhile, the production cost of enterprises is reduced, and the practicability of the device is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery device technology, and in particular to a waste heat recovery device based on an industrial boiler. Background Technology

[0002] To ensure the safe, stable, and efficient operation of steam boilers and to guarantee that the water quality produced meets stringent industrial standards and usage requirements, continuous blowdown is necessary. During steam boiler operation, as water evaporates, the concentration of impurities in the water gradually increases. If these impurities accumulate inside the boiler, they will form scale on the boiler's heating surfaces. Scale has extremely poor thermal conductivity, which will significantly reduce the boiler's heat transfer efficiency. At the same time, scale may also cause localized overheating of the boiler's heating surfaces, leading to serious safety accidents such as deformation, bulging, or even tube rupture of metal materials. In addition, impurities may affect the quality of steam, causing excessive salt and impurities in the steam, which can damage subsequent steam-using equipment and production processes. Continuous blowdown involves setting up a blowdown port near the boiler drum water level to continuously discharge boiler water with high salt content and a large amount of suspended solids outside the boiler, thereby effectively controlling the impurity content in the boiler water, maintaining stable boiler water quality, and ensuring the safe and economical operation of the steam boiler.

[0003] In existing technologies, most of the high-temperature, high-impurity wastewater continuously discharged from steam boilers is directly discharged, resulting in a large amount of waste heat not being recovered and reused, causing direct energy waste and keeping overall energy consumption high for a long time. This not only increases production costs but also violates the environmental protection requirements of energy conservation and emission reduction, and is also prone to causing multi-dimensional pollution to the surrounding environment. Therefore, it is necessary to improve a waste heat recovery device based on industrial boilers to solve the above problems. Utility Model Content

[0004] In order to overcome the problem of direct discharge of high-temperature and high-impurity wastewater from steam boilers, which leads to a large amount of waste heat waste, high overall energy consumption, increased production costs, violation of energy conservation and emission reduction requirements, and easy to cause multi-dimensional pollution to the surrounding environment.

[0005] The technical solution of this utility model is as follows: a waste heat recovery device based on an industrial boiler, including a filter box, a water storage tank fixedly connected to the right end of the filter box, a drying box fixedly connected to the top of the water storage tank, a first sealing door rotatably connected to the filter box via a rotating component, a second sealing door rotatably connected to the drying box via a rotating component, a filter plate disposed inside the filter box, an installation assembly disposed inside the filter box, a water inlet pipe fixedly connected inside the filter box, a first connecting pipe fixedly connected between the filter box and the water storage tank, a water outlet pipe fixedly connected inside the water storage tank, a first annular heat exchange pipe fixedly connected between the first connecting pipe and the water outlet pipe, a second connecting pipe fixedly connected between the water storage tank and the drying box, an air outlet pipe fixedly connected inside the drying box, a second annular heat exchange pipe fixedly connected between the second connecting pipe and the air outlet pipe, and a drying rack fixedly connected inside the drying box.

[0006] Preferably, there are two sets of filter plates, which are arranged from left to right inside the filter box.

[0007] Preferably, there are two sets of drying racks, which are arranged sequentially from bottom to top inside the drying chamber.

[0008] Preferably, a water inlet pipe is fixedly connected to the inside of the water storage tank, and a drain pipe is fixedly connected to the inside of the water storage tank. A one-way solenoid valve is installed on the water inlet pipe, and the one-way solenoid valve is installed on the drain pipe.

[0009] Preferably, two sets of one-way solenoid valves are provided, with the two sets of one-way solenoid valves distributed sequentially on the water inlet pipe and the drain pipe.

[0010] Preferably, the water storage tank is provided with an observation window, and the observation window is equipped with a water level marker.

[0011] Preferably, the mounting assembly includes a mounting frame fixedly connected to one side of the filter plate, a sealing ring fixedly connected to the mounting frame near the filter plate, a limiting strip fixedly connected to the inside of the filter box, a square frame fixedly connected to the filter box near the mounting frame, a locking block slidably connected to the inside of the square frame, a smooth rod fixedly connected to the right side of the locking block, a spring fixedly connected between the locking block and the square frame, and a lever fixedly connected to the smooth rod. The filter plate is located inside the sealing ring and the limiting strip. The locking block is engaged inside the mounting frame, and the smooth rod is slidably connected inside the square frame.

[0012] Preferably, the filter box has a matching groove at the corresponding position of the filter plate, and the filter plate is placed in the groove of the filter box.

[0013] Preferably, the mounting frame has a matching slot at the corresponding position of the card block, and the card block is engaged inside the slot of the mounting frame.

[0014] The beneficial effects of this utility model are:

[0015] 1. Wastewater from an industrial boiler enters the filter box through the inlet pipe. After being filtered by two sets of filter plates, impurities in the wastewater are effectively removed. The filtered water then enters the first annular heat exchange tube through the first connecting pipe, using the wastewater's waste heat to heat the water in the storage tank, achieving preliminary recovery of waste heat and improving energy utilization. Subsequently, the water can be discharged to the outside through the outlet pipe. The steam generated by heating the water in the storage tank enters the second annular heat exchange tube through the second connecting pipe, which can dry the objects on the drying rack, further recovering and utilizing waste heat. Finally, the steam is discharged through the exhaust pipe, avoiding the heat waste and environmental pollution caused by the direct discharge of high-temperature wastewater. At the same time, it reduces the company's production costs, improves the environmental protection of emission reduction, and significantly enhances the practicality of the device.

[0016] 2. The spring's elastic force can firmly fix the filter plate in the filter box, preventing it from shaking or shifting under the impact of sewage. It can also quickly release the locking block from the mounting frame, making it easy to disassemble, clean, or replace the filter plate. The operation is simple and convenient, improving the maintenance efficiency of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one embodiment of the waste heat recovery device based on an industrial boiler according to the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the water storage tank and drying box of this utility model;

[0019] Figure 3 This is a schematic diagram of the second annular heat exchange tube structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the filter plate structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the installation component structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the card block structure of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. Filter box; 21. Inlet pipe; 22. Filter plate; 23. First connecting pipe; 24. First annular heat exchange tube; 25. Outlet pipe; 26. Water inlet pipe; 27. Drain pipe; 28. One-way solenoid valve; 29. ​​Second connecting pipe; 210. Second annular heat exchange tube; 211. Air outlet pipe; 212. Drying rack; 31. Mounting frame; 32. Sealing ring; 33. Limiting strip; 34. Square frame; 35. Locking block; 36. Smooth rod; 37. Spring; 38. Toggle block; 4. Water storage tank; 5. Drying box; 6. First sealing door; 7. Second sealing door. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please see Figure 1 - Figure 6 This utility model provides an embodiment of a waste heat recovery device based on an industrial boiler, including a filter box 1, a water storage tank 4 fixedly connected to the right end of the filter box 1, a drying box 5 fixedly connected to the top of the water storage tank 4, a first sealing door 6 rotatably connected to the filter box 1 via a rotating component, a second sealing door 7 rotatably connected to the drying box 5 via a rotating component, a filter plate 22 disposed inside the filter box 1, an installation assembly disposed inside the filter box 1, a water inlet pipe 21 fixedly connected inside the filter box 1, and a water inlet pipe 21 fixedly connected to the filter box 1 and the water storage tank 4. The system includes a first connecting pipe 23 between water tanks 4, a water outlet pipe 25 fixedly connected inside water tank 4, a first annular heat exchange pipe 24 fixedly connected between the first connecting pipe 23 and the water outlet pipe 25, a second connecting pipe 29 fixedly connected between water tank 4 and drying chamber 5, an air outlet pipe 211 fixedly connected inside drying chamber 5, a second annular heat exchange pipe 210 fixedly connected between the second connecting pipe 29 and the air outlet pipe 211, and a drying rack 212 fixedly connected inside drying chamber 5. Wastewater from the industrial boiler enters the filter box 1 through the water inlet pipe 21. After being filtered by two sets of filter plates 22, impurities in the wastewater can be effectively removed. The filtered water enters the first annular heat exchange tube 24 through the first connecting pipe 23, using the wastewater waste heat to heat the water in the storage tank 4, achieving preliminary recovery of wastewater waste heat and improving energy utilization. Subsequently, the water can be discharged to the outside through the outlet pipe 25. The water vapor generated by heating the water in the storage tank 4 enters the second annular heat exchange tube 210 through the second connecting pipe 29, which can dry the objects on the drying rack 212, further recovering and utilizing waste heat. Finally, the water vapor... The wastewater is discharged through the vent pipe 211, avoiding heat waste and environmental pollution caused by direct discharge of high-temperature wastewater. At the same time, it reduces the production cost of enterprises, improves the environmental protection of emission reduction, and significantly enhances the practicality of the device. The installation components can firmly fix the filter plate 22 in the filter box 1 through the elastic force of the spring 37, preventing the filter plate 22 from shaking or shifting under the impact of wastewater. It can also quickly release the locking block 35 from the mounting frame 31, making it easy to disassemble, clean or replace the filter plate 22. The operation is simple and convenient, improving the maintenance efficiency of the device.

[0026] Please see Figure 1 - Figure 3In this embodiment, two sets of filter plates 22 are provided, arranged from left to right inside the filter box 1. By setting two sets of filter plates 22 arranged from left to right, the industrial boiler wastewater entering the filter box 1 can be filtered step by step. The first set of filter plates 22 intercepts larger particulate impurities, and the second set of filter plates 22 filters smaller impurities, significantly improving the filtration effect, ensuring the smooth operation of the subsequent waste heat recovery process, reducing the pollution of the water source to the outside, and facilitating the cleaning of residue inside the filter box 1 through the first sealing door 6, improving the practicality of the device. Two sets of drying racks 212 are provided, arranged from bottom to top inside the drying box 1. Inside the drying chamber 5, two sets of drying racks 212 arranged vertically increase the space available for placing items to be dried, allowing for simultaneous drying of more items, improving waste heat utilization, ensuring drying quality, and enhancing the practicality of the device. A water inlet pipe 26 and a drain pipe 27 are fixedly connected inside the water storage tank 4. A one-way solenoid valve 28 is installed on the water inlet pipe 26 and the drain pipe 27. By installing the water inlet pipe 26 and drain pipe 27 inside the water storage tank 4, and attaching the one-way solenoid valve 28, the water inlet pipe 26 can easily replenish the water storage tank 4 with water to be heated, ensuring sufficient water supply. Sufficient water is always present in tank 4 for waste heat exchange; drain pipe 27 promptly discharges heated water for subsequent use, while one-way solenoid valve 28 effectively prevents backflow of water in water inlet pipe 26 and drain pipe 27, avoiding water source contamination or affecting the pressure stability within water tank 4, thus ensuring the orderly progress of the heating process. Two sets of one-way solenoid valves 28 are provided, sequentially distributed on water inlet pipe 26 and drain pipe 27. By installing one set of one-way solenoid valves 28 on each of water inlet pipe 26 and drain pipe 27, the water flow control of water inlet pipe 26 and drain pipe 27 is independent of each other. The one-way solenoid valve 28 on water inlet pipe 26 can independently control the water inlet direction, preventing backflow of water in water tank 4. Water flows back to the water inlet pipe 26; the one-way solenoid valve 28 of the drain pipe 27 independently controls the drainage direction, preventing external water from flowing back into the water storage tank 4, further improving the stability and reliability of the water storage tank 4. The water storage tank 4 is equipped with an observation window and a water level marker. By opening an observation window with a water level marker on the water storage tank 4, the operator can intuitively observe the water level inside the water storage tank 4. According to the water level marker, the operator can quickly determine whether the water level in the tank is sufficient or whether drainage is needed, which facilitates timely replenishment of water through the water inlet pipe 26 or drainage through the drain pipe 27. This avoids the problem of overflow due to excessively high water level or affecting the waste heat recovery efficiency due to excessively low water level, and improves the ease of operation of the device.

[0027] Please see Figure 4 - Figure 6In this embodiment, the mounting assembly includes a mounting frame 31 fixedly connected to one side of the filter plate 22, a sealing ring 32 fixedly connected to the mounting frame 31 near the filter plate 22, a limiting strip 33 fixedly connected inside the filter box 1, a square frame 34 fixedly connected to the filter box 1 near the mounting frame 31, a locking block 35 slidably connected inside the square frame 34, a light rod 36 fixedly connected to the right side of the locking block 35, a spring 37 fixedly connected between the locking block 35 and the square frame 34, and a lever 38 fixedly connected to the light rod 36. The filter plate 22 is disposed inside the sealing ring 32, and the filter... The filter plate 22 is located inside the limiting strip 33, the locking block 35 is engaged inside the mounting frame 31, and the smooth rod 36 is slidably connected inside the square frame 34. Through the elastic force of the spring 37, the filter plate 22 can be firmly fixed inside the filter box 1, preventing the filter plate 22 from shaking or shifting under the impact of sewage. The sealing ring 32 enhances the sealing between the mounting frame 31 and the filter box 1, preventing sewage leakage from gaps. By moving the toggle block 38 to move the smooth rod 36 and the locking block 35, the locking block 35 can be quickly released from the mounting frame 31, facilitating the disassembly, cleaning, or replacement of the filter plate 22. The operation is simple and convenient, improving the maintenance efficiency of the device. The filter box 1 has a matching groove at the corresponding position of the filter plate 22. The filter plate 22 is placed in the groove of the filter box 1. By opening a groove on the filter box 1 to match the filter plate 22 and placing the filter plate 22 in the groove, the groove provides precise positioning and support for the filter plate 22, ensuring that the filter plate 22 is installed more securely in the filter box 1. This allows the filter plate 22 to be smoothly inserted or removed along the groove, facilitating the replacement and maintenance of the filter plate 22 and ensuring the continuous effectiveness of the filtration function. The mounting frame 31 is secured by the locking block 35. The corresponding position is provided with a matching slot. The locking block 35 is locked into the slot of the mounting frame 31. When the filter plate 22 is aligned with the slot of the filter box 1 and inserted, the mounting frame 31 contacts the arc end of the locking block 35, causing the locking block 35 to slide into the inside of the square frame 34, compressing the spring 37. When the sealing ring 32 on the mounting frame 31 abuts against the filter box 1, the compressed spring 37 causes the locking block 35 to lock into the slot of the mounting frame 31, ensuring the stability of the filter plate 22's filtration position. It also makes the locking and separation process smoother, improving reliability and ease of operation.

[0028] During operation, wastewater discharged from the industrial boiler first enters the filter box 1 through the inlet pipe 21. Inside the filter box 1, the wastewater flows sequentially through two sets of filter plates 22 distributed from left to right, removing impurities of different sizes through two-stage filtration. The filtered wastewater then enters the first annular heat exchange pipe 24 inside the water storage tank 4 through the first connecting pipe 23. The wastewater's own residual heat heats the water source inside the water storage tank 4, which can be replenished through the water supply pipe 26. One-way solenoid valves 28 on the water supply pipe 26 and the drain pipe 27 control the inlet and outlet directions respectively to prevent backflow, thereby heating the water source inside the water storage tank 4. The heat-exchanged wastewater is then discharged through the outlet pipe 25. The heated water source inside the water storage tank 4 generates steam. Steam enters the second annular heat exchange tube 210 inside the drying chamber 5 through the second connecting pipe 29, heating and drying the objects on the two sets of vertically distributed drying racks 212 inside the drying chamber 5, making full use of the steam waste heat; the steam after heat exchange is finally discharged through the exhaust pipe 211. The whole process realizes the recovery and efficient utilization of waste heat from industrial boiler wastewater. Furthermore, by moving the lever 38 to the right, the filter plate 22 can be easily removed from the inside of the filter box 1 for cleaning. The first sealing door 6 facilitates the cleaning of filter impurities inside the filter box 1, and the second sealing door 7 facilitates the placement of objects to be dried on the drying racks 212, or the removal of dried objects from the drying racks 212.

[0029] Through the above steps, industrial boiler wastewater enters the filter box 1 through the inlet pipe 21. After impurities are removed by two sets of filter plates 22, it enters the first annular heat exchange tube 24 through the first connecting pipe 23. The waste heat is used to heat the water source in the storage tank 4, realizing the initial recovery of waste heat and improving energy utilization. The water source is discharged through the outlet pipe 25. The water vapor generated by heating enters the second annular heat exchange tube 210 through the second connecting pipe 29 to dry the objects on the drying rack 212 to further recover waste heat. Finally, the water vapor is discharged through the steam outlet pipe 211. This avoids heat waste and environmental pollution, reduces production costs, and improves environmental protection and equipment practicality. It solves the problem of direct discharge of high-temperature and high-impurity wastewater from steam boilers, which leads to a large amount of waste heat waste, high overall energy consumption, increased production costs, violation of energy conservation and emission reduction requirements, and easy multi-dimensional pollution to the surrounding environment.

Claims

1. A waste heat recovery device based on industrial boilers, comprising a filtering tank (1), characterized in that: It also includes a water storage tank (4) fixedly connected to the right end of the filter box (1), a drying box (5) fixedly connected to the top of the water storage tank (4), a first sealing door (6) rotatably connected to the filter box (1) via a rotating component, a second sealing door (7) rotatably connected to the drying box (5) via a rotating component, a filter plate (22) disposed inside the filter box (1), an installation assembly disposed inside the filter box (1), an inlet pipe (21) fixedly connected inside the filter box (1), and a first sealing door (7) fixedly connected between the filter box (1) and the water storage tank (4). Connecting pipe (23), water outlet pipe (25) fixedly connected inside water storage tank (4), first annular heat exchange pipe (24) fixedly connected between first connecting pipe (23) and water outlet pipe (25), second connecting pipe (29) fixedly connected between water storage tank (4) and drying box (5), air outlet pipe (211) fixedly connected inside drying box (5), second annular heat exchange pipe (210) fixedly connected between second connecting pipe (29) and air outlet pipe (211), and drying rack (212) fixedly connected inside drying box (5).

2. A waste heat recovery device based on an industrial boiler according to claim 1, characterized in that: There are two sets of filter plates (22), which are distributed from left to right inside the filter box (1).

3. A waste heat recovery device based on industrial boiler as claimed in claim 1, wherein: There are two sets of drying racks (212), which are arranged from bottom to top inside the drying box (5).

4. A waste heat recovery device based on an industrial boiler according to claim 1, characterized in that: The water tank (4) is fixedly connected to a water inlet pipe (26) and a drain pipe (27). A one-way solenoid valve (28) is installed on the water inlet pipe (26) and the one-way solenoid valve (28) is installed on the drain pipe (27).

5. A waste heat recovery device based on an industrial boiler according to claim 4, characterized in that: Two sets of one-way solenoid valves (28) are provided, and the two sets of one-way solenoid valves (28) are distributed on the water supply pipe (26) and the drain pipe (27) respectively.

6. A waste heat recovery device based on industrial boiler as claimed in claim 1, wherein: An observation window is provided on the water storage tank (4), and a water level marker is provided on the observation window.

7. A waste heat recovery device based on industrial boiler as claimed in claim 1, wherein: The mounting components include a mounting frame (31) fixedly connected to one side of the filter plate (22), a sealing ring (32) fixedly connected to the side of the mounting frame (31) near the filter plate (22), a limiting strip (33) fixedly connected to the inside of the filter box (1), a square frame (34) fixedly connected to the side of the filter box (1) near the mounting frame (31), a locking block (35) slidably connected to the inside of the square frame (34), a smooth rod (36) fixedly connected to the right side of the locking block (35), a spring (37) fixedly connected between the locking block (35) and the square frame (34), and a lever (38) fixedly connected to the smooth rod (36). The filter plate (22) is located inside the sealing ring (32), the filter plate (22) is located inside the limiting strip (33), the locking block (35) is engaged inside the mounting frame (31), and the smooth rod (36) is slidably connected inside the square frame (34).

8. A waste heat recovery device based on an industrial boiler according to claim 7, characterized in that: The filter box (1) has a matching groove at the corresponding position of the filter plate (22), and the filter plate (22) is set in the groove of the filter box (1).

9. A waste heat recovery device based on an industrial boiler according to claim 7, characterized in that: The mounting frame (31) has a matching slot at the corresponding position of the card block (35), and the card block (35) is engaged in the slot of the mounting frame (31).

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