Waste gas treatment device for recycling waste heat of high-temperature waste gas

Abstract

The waste gas treatment device comprises a fixing frame, the top of the fixing frame is fixedly connected with a first water tank and a second water tank, the bottom of the first water tank is fixedly connected with a gas inlet pipe, and the bottom end of the gas inlet pipe is inserted into the bottom of the fixing frame. A first spiral heat exchange pipe is fixedly connected into the first water tank, and the top end of the air inlet pipe is fixedly communicated with the bottom end of the first spiral heat exchange pipe. Through the design of the double water tanks, the water inlet mechanism sprays water at a high position to feed water, residual temperature of waste gas is efficiently absorbed in the second water tank, then water is fed into the first water tank at a low position through the booster pump, and the flowing direction of the fed water conforms to the flowing direction of the waste gas, so that the device has continuously adjustable and controllable heat recovery; and meanwhile, heat recovery is more thorough, the final exhaust temperature of waste gas is reduced, and the device is more environmentally friendly and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas treatment device for recycling the residual heat of high-temperature waste gas. Background Art

[0002] Waste gas refers to toxic and harmful gases discharged by humans in the process of production and life, especially from chemical plants, steel mills, pharmaceutical plants, coking plants and refineries. The waste gas emitted has a strong odor, seriously polluting the environment and affecting human health. Therefore, waste gas treatment equipment is needed to treat it. In addition, the temperature of the waste gas is relatively high, and direct discharge will waste a lot of energy. Therefore, the heat in the waste gas will be recovered and reused, which is more environmentally friendly.

[0003] For example, the utility model patent with application number 2021225755398 discloses a waste gas treatment device for the reuse of waste heat from high-temperature exhaust gas. It includes a water tank body, a water storage chamber is provided in the water tank body, an exhaust pipe is provided in the water storage chamber, both ends of the exhaust pipe extend out of the water storage chamber respectively, a water inlet pipe connected to the water storage chamber is provided at the upper end of the water tank body, a water pump is provided at the other end of the water inlet pipe, a drain port is provided at the lower end of the water tank body, regulating valves are provided at the air inlet of the exhaust pipe and the water inlet of the water inlet pipe, and a regulating mechanism for controlling the regulating valve to adjust the air intake rate and water intake rate in the exhaust pipe and the water inlet pipe is provided at the upper end of the water tank body. The utility model provides a waste gas treatment device for the reuse of waste heat from high-temperature exhaust gas. It can realize the function of rationally utilizing the waste heat of high-temperature exhaust gas, solve the problem of not being able to rationally utilize the waste heat of high-temperature exhaust gas, and achieve the effect of rationally utilizing resources and avoiding waste of resources.

[0004] However, in the existing technical solutions, a single water tank is generally set for heat exchange, and the heat of the exhaust gas is continuously recovered by the continuous flow of water. The exhaust gas can only be contacted and absorbed once, and the energy recovery rate is not high. The discharged exhaust gas still has a high temperature, and due to the continuous flow of water, it is difficult to heat the water to a higher temperature. Therefore, the utilization efficiency after recovery is also low. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an exhaust gas treatment device for recycling waste heat of high-temperature exhaust gas to solve the background technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] 14. The exhaust gas treatment device according to claim 13, wherein the top of the fixing frame is fixedly connected to a first water tank and a second water tank, the bottom of the first water tank is fixedly connected to an air intake pipe, the bottom end of the air intake pipe is plugged into the bottom of the fixing frame, the interior of the first water tank is fixedly connected to a first spiral heat exchange pipe, the top end of the air intake pipe is connected and fixed to the bottom end of the first spiral heat exchange pipe, the top end of the first spiral heat exchange pipe is plugged into the top of the first water tank, a rotating part is installed on the top of the first water tank, a connecting pipe is fixedly connected to the top of the rotating part, the other end of the connecting pipe is plugged into the interior of the second water tank, the right end of the connecting pipe is fixedly connected to the second spiral heat exchange pipe, the bottom end of the second spiral heat exchange pipe is plugged into the bottom of the second water tank, the bottom end of the second spiral heat exchange pipe is fixedly connected to the exhaust pipe, the bottom end of the exhaust pipe is plugged into the bottom of the fixing frame, a water inlet mechanism is installed on the outer side of the second water tank near the top, and a booster pump is installed between the first water tank and the second water tank.

[0008] As a further description of the above technical solution: the rotating part includes an air guide hood, a paddle head and a stirring rod, the air guide hood is fixedly installed on the first water tank, the inside of the air guide hood is rotatably connected to the paddle head, the bottom of the paddle head is fixedly connected to the top of the stirring rod, the stirring rod is inserted into the interior of the first water tank and rotatably connected thereto, and the first spiral heat exchange tube is sleeved on the outside of the stirring rod.

[0009] As a further description of the above technical solution: the water inlet mechanism includes a water inlet pump, an output pipe and a nozzle group, the water inlet pump is fixedly installed to the outside of the second water tank, the output end of the water inlet pump is fixedly connected to the output pipe, the output pipe is plugged into the interior of the second water tank, and the nozzle group is fixedly installed to the left side of the output pipe.

[0010] As a further description of the above technical solution: one end of the output pipe located inside the second water tank is in the shape of an arc-shaped hollow plate that fits the contour of the inner wall of the second water tank.

[0011] As a further description of the above technical solution: a pressure gauge is fixedly installed on the top of the first water tank, and a water outlet joint is fixedly installed on the left side of the first water tank, and the water outlet joint is close to the top of the first water tank.

[0012] As a further description of the above technical solution: an exhaust fan is fixedly installed on the right end of the exhaust pipe, and the exhaust fan is fixedly connected to the fixing frame.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] This solution adopts a double water tank design and uses the water inlet mechanism to spray water at a high position, efficiently absorb the residual temperature of the exhaust gas inside the second water tank, and then use the booster pump to fill the first water tank with water at a low position. The water inlet flow direction follows the exhaust gas flow direction, thereby realizing the device with continuous and adjustable heat recovery. At the same time, the heat recovery is more thorough, the final exhaust temperature of the exhaust gas is reduced, and it is more environmentally friendly and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0018] Figure 4 It is a partial three-dimensional structural schematic diagram of the utility model.

[0019] Description of the numbers in the figure:

[0020] 1. Fixed frame; 2. First water tank; 21. Pressure gauge; 22. Water outlet joint; 3. Second water tank; 4. Air inlet pipe; 5. First spiral heat exchange tube; 6. Rotating part; 61. Air guide cover; 62. Blade head; 63. Agitating rod; 7. Connecting pipe; 8. Exhaust pipe; 81. Exhaust fan; 9. Water inlet mechanism; 91. Water inlet pump; 92. Output pipe; 93. Nozzle group; 10. Booster pump; 11. Second spiral heat exchange tube. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] See also Figures 1 to 4In the utility model, a waste gas treatment device for recycling waste heat of high-temperature waste gas includes a fixing frame 1, a first water tank 2 and a second water tank 3 are fixedly connected to the top of the fixing frame 1, an air intake pipe 4 is fixedly connected to the bottom of the first water tank 2, the bottom end of the air intake pipe 4 is plugged into the bottom of the fixing frame 1, a first spiral heat exchange tube 5 is fixedly connected to the inside of the first water tank 2, the top end of the air intake pipe 4 is connected and fixed to the bottom end of the first spiral heat exchange tube 5, the top end of the first spiral heat exchange tube 5 is plugged into the top of the first water tank 2, and the top of the first water tank 2 is installed A rotating part 6 is installed, and a connecting pipe 7 is fixedly connected to the top of the rotating part 6. The other end of the connecting pipe 7 is plugged into the interior of the second water tank 3. The right end of the connecting pipe 7 is fixedly connected to a second spiral heat exchange tube 11. The bottom end of the second spiral heat exchange tube 11 is plugged into the bottom of the second water tank 3. The bottom end of the second spiral heat exchange tube 11 is fixedly connected to the exhaust pipe 8. The bottom end of the exhaust pipe 8 is plugged into the bottom of the fixed frame 1. A water inlet mechanism 9 is installed on the outside of the second water tank 3 near the top, and a booster pump 10 is installed between the first water tank 2 and the second water tank 3.

[0023] In the utility model, the fixed frame 1 is provided as a device. When in use, the water inlet mechanism 9 and the booster pump 10 are first started to fill the first water tank 2 with water, and the air inlet pipe 4 is connected to the exhaust gas discharge pipe. Then the exhaust gas enters the interior of the first spiral heat exchange tube 5 to realize heat exchange and recovery. The exhaust gas flows upward and pushes the rotating part 6 to rotate, so as to stir the water flow inside the first water tank 2, so that the heat exchange and absorption are more sufficient. The exhaust gas will then enter the second spiral heat exchange tube 11 inside the second water tank 3 for secondary exchange, and the water inlet mechanism 9 is continuously sprayed to realize the sufficient absorption of the waste heat of the exhaust gas.

[0024] And the water temperature can be regulated according to the needs. When the water temperature is required to be higher, the power of the booster pump 10 can be controlled to adjust the water intake, and the water intake of the water intake mechanism 9 can be adjusted at the same time. Since the booster pump 10 fills the first water tank 2 with water from the bottom, the cold water first contacts the high-temperature exhaust gas from the bottom to achieve efficient absorption, and as the water flow temperature rises, the water with a higher temperature flows upward and is discharged outward, thereby achieving a more efficient heat exchange efficiency. As the water flow rate decreases, the exhaust gas has an obvious heating effect on the water flow inside the first water tank 2, which can increase the water flow temperature therein, and as the flow rate decreases, the water temperature increases, and the residual temperature of the exhausted exhaust gas becomes higher. At this time, the exhaust gas passes through the inside of the second spiral heat exchange tube 11, and as The water inlet mechanism 9 continuously sprays the second spiral heat exchange tube 11 to achieve preheating and recycling, so as to achieve more thorough recycling. On the contrary, as the water flow rate increases, the final discharged water temperature decreases, thereby realizing that the device has continuous and adjustable heat recovery. At the same time, the heat recovery is more thorough, and the final exhaust temperature of the exhaust gas is reduced, which is more environmentally friendly and efficient. It solves the problem that the prior art uses the continuous flow of water to continuously recover the heat of the exhaust gas, and can only perform one-time contact heat absorption on the exhaust gas, resulting in a low energy recovery rate. The discharged exhaust gas still has a high temperature, and due to the continuous flow of water, it is difficult to heat the water to a higher temperature, so the utilization efficiency after recovery is also low.

[0025] See also Figure 3 , wherein: the rotating member 6 includes an air guide cover 61, a paddle head 62 and a stirring rod 63, the air guide cover 61 is fixedly mounted on the first water tank 2, the inside of the air guide cover 61 is rotatably connected with the paddle head 62, the bottom of the paddle head 62 is fixedly connected to the top of the stirring rod 63, the stirring rod 63 is inserted into the inside of the first water tank 2 and is rotatably connected thereto, and the first spiral heat exchange tube 5 is sleeved on the outside of the stirring rod 63.

[0026] In the utility model, the exhaust gas rises through the connecting pipe 7, pushing the blade head 62 to rotate, thereby driving the stirring rod 63 to rotate, stirring the water flow around the first spiral heat exchange tube 5, so that the water flow contacts it more fully, thereby improving the exchange efficiency.

[0027] See also Figure 2 , wherein: the water inlet mechanism 9 includes a water inlet pump 91, an output pipe 92 and a nozzle group 93, the water inlet pump 91 is fixedly installed to the outside of the second water tank 3, the output end of the water inlet pump 91 is fixedly connected to the output pipe 92, the output pipe 92 is plugged into the inside of the second water tank 3, and the nozzle group 93 is fixedly installed to the left side of the output pipe 92.

[0028] In the utility model, the water inlet pump 91 is started to spray the second spiral heat exchange tube 11 from a high place inside the second water tank 3 through the output pipe 92 and the nozzle group 93, and the horizontal plane is always kept below one half of the internal capacity of the second water tank 3. By spraying, the upper half of the second spiral heat exchange tube 11 is in full and continuous contact with the water flow, thereby achieving better absorption of residual heat remaining in the exhaust gas and improving the energy recovery rate.

[0029] See also Figure 4 , wherein: one end of the output pipe 92 located inside the second water tank 3 is in the shape of an arc-shaped hollow plate that fits the contour of the inner wall of the second water tank 3 .

[0030] In the utility model, a section of the output pipe 92 located inside the second water tank 3 is an arc-shaped hollow plate that fits the inner wall contour of the second water tank 3, so that the sprayed water flow is evenly distributed on the outside of the second spiral heat exchange tube 11, making the contact more complete and comprehensive.

[0031] See also Figure 1 and Figure 2 , wherein: a pressure gauge 21 is fixedly installed on the top of the first water tank 2 , a water outlet joint 22 is fixedly installed on the left side of the first water tank 2 , and the water outlet joint 22 is close to the top position of the first water tank 2 .

[0032] In the utility model, the high-temperature water flow inside the first water tank 2 is discharged externally through the water outlet joint 22, and the water outlet joint 22 is located at the top of the first water tank 2, so that the high-temperature water at the top flows out first, ensuring efficient heat recovery, and the pressure condition inside the first water tank 2 is conveniently observed through the pressure gauge 21.

[0033] See also Figure 1 and Figure 2 , wherein: an exhaust fan 81 is fixedly installed at the right end of the exhaust pipe 8, and the exhaust fan 81 is fixedly connected to the fixing frame 1.

[0034] In the utility model, the exhaust fan 81 is used to achieve the suction effect on the exhaust pipe 8, thereby increasing the flow power of the airflow, so that the exhaust gas can smoothly drive the blade head 62 to rotate, and the structure is more reasonable and efficient.

[0035] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A waste gas treatment device for recycling waste heat of high-temperature waste gas, comprising a fixing frame (1), characterized in that: The top of the fixing frame (1) is fixedly connected to a first water tank (2) and a second water tank (3); the bottom of the first water tank (2) is fixedly connected to an air intake pipe (4); the bottom end of the air intake pipe (4) is plugged into the bottom of the fixing frame (1); the interior of the first water tank (2) is fixedly connected to a first spiral heat exchange pipe (5); the top end of the air intake pipe (4) is connected and fixed to the bottom end of the first spiral heat exchange pipe (5); the top end of the first spiral heat exchange pipe (5) is plugged into the top of the first water tank (2); the first water tank ( 2) is provided with a rotating member (6) at the top, the top of the rotating member (6) is fixedly connected with a connecting pipe (7), the other end of the connecting pipe (7) is plugged into the interior of the second water tank (3), the right end of the connecting pipe (7) is fixedly connected with a second spiral heat exchange tube (11), the bottom end of the second spiral heat exchange tube (11) is plugged into the bottom of the second water tank (3), the bottom end of the second spiral heat exchange tube (11) is fixedly connected to an exhaust pipe (8), and the bottom end of the exhaust pipe (8) is plugged into the bottom of the fixing frame (1); A water inlet mechanism (9) is installed on the outside of the second water tank (3) near the top, and a booster pump (10) is installed between the first water tank (2) and the second water tank (3).

2. The exhaust gas treatment device for recycling waste heat of high-temperature exhaust gas according to claim 1, characterized in that: The rotating member (6) comprises an air guide cover (61), a paddle head (62) and a stirring rod (63); the air guide cover (61) is fixedly mounted on the first water tank (2); the inside of the air guide cover (61) is rotatably connected to the paddle head (62); the bottom of the paddle head (62) is fixedly connected to the top of the stirring rod (63); the stirring rod (63) is inserted into the inside of the first water tank (2) and is rotatably connected thereto; the first spiral heat exchange tube (5) is sleeved on the outside of the stirring rod (63).

3. The exhaust gas treatment device for recycling waste heat of high-temperature exhaust gas according to claim 1, characterized in that: The water inlet mechanism (9) comprises a water inlet pump (91), an output pipe (92) and a nozzle group (93); the water inlet pump (91) is fixedly mounted on the outside of the second water tank (3); the output end of the water inlet pump (91) is fixedly connected to the output pipe (92); the output pipe (92) is plugged into the inside of the second water tank (3); and the nozzle group (93) is fixedly mounted on the left side of the output pipe (92).

4. The exhaust gas treatment device for recycling waste heat of high-temperature exhaust gas according to claim 3 is characterized in that: The section of the output pipe (92) located inside the second water tank (3) is in the shape of an arc-shaped hollow plate that fits the contour of the inner wall of the second water tank (3).

5. The exhaust gas treatment device for recycling waste heat of high-temperature exhaust gas according to claim 1 is characterized in that: A pressure gauge (21) is fixedly mounted on the top of the first water tank (2), and a water outlet joint (22) is fixedly mounted on the left side of the first water tank (2), wherein the water outlet joint (22) is located close to the top of the first water tank (2).

6. The exhaust gas treatment device for recycling waste heat of high-temperature exhaust gas according to claim 1, characterized in that: An exhaust fan (81) is fixedly mounted on the right end of the exhaust pipe (8), and the exhaust fan (81) is fixedly connected to the fixing frame (1).

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