A high-temperature waste gas recycling device

Abstract

The present invention relates to the technical field of high-temperature waste gas reuse, and discloses a high-temperature waste gas reuse device, including a waste gas inlet pipe, a heat pump, and a steam tank. A cooling part is arranged between the waste gas inlet pipe and the heat pump, and a heat exchange part is arranged inside the cooling part and the steam tank. By using the waste gas pipe and the heat exchange pipe wound together, when the waste gas flows in the waste gas pipe, it can better exchange heat with the heat exchange medium in the heat exchange pipe through the pipe walls of the waste gas pipe and the heat exchange pipe. An inlet liquid chamber and a drain liquid chamber are provided for the flow of the heat exchange medium in the heat exchange pipe, so as to ensure that the heat exchange medium can circulate in the heating pipe and the heat exchange pipe through the heat exchange medium circulation part, and then transfer the heat from the waste gas to the water in the steam tank. Since the waste gas pipe is a spiral pipe, on the one hand, it can increase the contact area between the waste gas pipe and the heat exchange pipe, and on the other hand, it can reduce the flow rate of the waste gas in the waste gas pipe, so that the heat in the waste gas has enough time to be transferred to the heat exchange medium.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature waste gas recycling, and particularly to a high-temperature waste gas recycling device. Background Art

[0002] During industrial production processes, a large amount of waste gas needs to be treated. These waste gases carry a large amount of high-temperature waste heat. The conventional method is to use a high-temperature resistant spray tower for environmental protection treatment, and ultimately a large amount of waste heat is discharged into the atmosphere, which not only causes huge energy waste but also serious thermal pollution to the atmospheric environment. Because the temperature of the waste gas is extremely high, a heat pump is often used to recover the heat in the waste gas. However, the waste gas has the problem of instability, that is, it cannot ensure that the waste gas can continuously and stably enter the heat pump, and the waste gas often contains corrosive substances. Directly introducing it into the heat pump will cause damage to the internal structure of the heat pump. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-temperature waste gas recycling device to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A high-temperature waste gas recycling device includes a waste gas inlet pipe, a heat pump, and a steam tank. A cooling part is arranged between the waste gas inlet pipe and the heat pump. A heat exchange part is arranged inside the cooling part and the steam tank. The heat release end of the heat pump is arranged inside the steam tank. A primary treatment part is arranged between the heat pump and the cooling part. The exhaust end of the heat pump is communicated with a secondary treatment part. The top of the steam tank is communicated with a steam delivery part.

[0005] Further, the cooling part includes a cooling tank. The top of the cooling tank is communicated with the bottom of the waste gas inlet pipe. A water pipe is communicated with the front of the cooling tank. The end of the water pipe away from the cooling tank is communicated with the inside of the steam tank. A water inlet pipe is communicated with the right outer wall of the cooling tank.

[0006] Further, the heat exchange part includes an exhaust gas pipe, a heat exchange pipe, a partition plate, and a heating pipe. The partition plate is fixedly installed on the inner wall of the cooling tank. The partition plate divides the interior of the cooling tank into two upper and lower cavities. The upper cavity is the liquid inlet chamber, and the lower cavity is the liquid discharge chamber. The top and bottom ends of the exhaust gas pipe extend out of the liquid inlet chamber and the liquid discharge chamber respectively, and the exhaust gas pipe is not communicated with the liquid inlet chamber and the liquid discharge chamber. The top end of the heat exchange pipe is communicated with the interior of the liquid inlet chamber, and the bottom end of the heat exchange pipe is communicated with the interior of the liquid discharge chamber. The exhaust gas pipe and the heat exchange pipe are spiral pipes, and the exhaust gas pipe and the heat exchange pipe are wound together. A heat exchange medium flows inside the heat exchange pipe. The heating pipe is arranged in the steam tank. The left side of the liquid inlet chamber is communicated with a liquid inlet pipe, and the left side of the liquid discharge chamber is communicated with a liquid outlet pipe. A heat exchange medium circulation part is communicated between the heating pipe and the liquid inlet pipe and the liquid outlet pipe.

[0007] Further, the heat exchange medium circulation part includes a circulation pump and a heat exchange medium storage tank. The output end of the circulation pump is communicated with a third connecting pipe. The right end of the third connecting pipe is communicated with the liquid inlet pipe. The input end of the circulation pump is communicated with a first connecting pipe. The left end of the first connecting pipe is communicated with the top end of the heating pipe. The right side of the heat exchange medium storage tank is communicated with a fourth connecting pipe. The fourth connecting pipe is communicated with the liquid outlet pipe. The left side of the heat exchange medium storage tank is communicated with a second connecting pipe. The left end of the second connecting pipe is communicated with the bottom end of the heating pipe.

[0008] Further, six groups of the exhaust gas pipes and the heat exchange pipes are provided, and they are circumferentially and arrayed in the cooling tank. The heat exchange medium is heat-conducting oil. The heating pipe is a multi-layer coil pipe, and the adjacent upper and lower coil pipes are communicated.

[0009] Further, oil slow-flow plates are fixedly installed on the inner wall of the cooling tank. The slow-flow plates are inclined plates, and the slow-flow plates are located above the exhaust gas pipe. Six slow-flow plates are provided, and they correspond to the exhaust gas pipes one by one.

[0010] Further, a one-way valve is provided at the connection between the water pipe and the cooling tank. The connection between the water pipe and the cooling tank is located between the liquid inlet chamber and the liquid discharge chamber. The connection between the water inlet pipe and the cooling tank is located between the liquid inlet chamber and the liquid discharge chamber.

[0011] Further, the primary treatment part includes a cyclone separator. The input end of the cyclone separator is communicated with the interior of the cooling tank, and the input end of the cyclone separator is located below the liquid discharge chamber. The gas outlet end of the cyclone separator is communicated with a first connecting pipe. The left end of the first connecting pipe is communicated with a booster pump. The gas outlet end of the booster pump is communicated with a second connecting pipe. The left end of the second connecting pipe is communicated with the intake end of the heat pump.

[0012] Further, the secondary treatment unit includes a third connecting pipe and a spray tower. The top end of the third connecting pipe is connected to the air outlet end of the heat pump, and the bottom end of the third connecting pipe is connected to the air inlet end of the spray tower. An exhaust pipe is connected to the top end of the spray tower.

[0013] Further, the steam delivery unit includes a U-shaped pipe and a buffer tank. One end of the U-shaped pipe is connected to the top end of the steam tank, and the other end is connected to the top of the buffer tank. A steam outlet pipe is connected to the bottom of the buffer tank.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. Before the waste gas is introduced into the heat pump, the primary treatment unit is used to perform primary treatment on the waste gas, so that the waste gas can be stably input into the heat pump, and the corrosive particles in the waste gas are treated to avoid damage to the heat pump. Before the primary treatment of the waste gas, the cooling unit is used to cool the waste gas to avoid damage to the filtering structure in the primary treatment unit caused by high-temperature waste gas. At the same time, the heat exchange unit transfers the heat during the cooling process to the steam tank to heat the water in the steam tank. When the heat transferred from the heat exchange unit to the steam tank is not enough to boil the water in the steam tank, the heat pump can recover the waste heat in the waste gas and then generate enough heat to boil the water in the steam tank, so that the entire waste gas utilization device can continuously generate stable steam;

[0016] 2. By using the waste gas pipe and the heat exchange pipe wound together, when the waste gas flows in the waste gas pipe, it can better exchange heat with the heat exchange medium in the heat exchange pipe through the pipe walls of the waste gas pipe and the heat exchange pipe. The liquid inlet chamber and the liquid discharge chamber are provided for the flow of the heat exchange medium in the heat exchange pipe, so as to ensure that the heat exchange medium can circulate in the heating pipe and the heat exchange pipe through the heat exchange medium circulation unit, and then transfer the heat from the waste gas to the water in the steam tank. Since the waste gas pipe is a spiral pipe, on the one hand, it can increase the contact area between the waste gas pipe and the heat exchange pipe, and on the other hand, it can reduce the flow rate of the waste gas in the waste gas pipe, so that the heat in the waste gas has enough time to be transferred to the heat exchange medium;

[0017] 3. The cooled waste gas is filtered by a cyclone separator to separate the corrosive particulate matter in the waste gas from the air flow. The air flow enters the booster pump through the first connecting pipe and is introduced into the heat pump after being pressurized or decompressed by the booster pump to ensure that the waste gas can continuously and stably enter the heat pump;

[0018] 4. The waste gas with recovered waste heat by the heat pump is introduced into the spray tower through the third connecting pipe, and the waste gas is sprayed and treated by the spray tower to remove acid and sulfur from the waste gas, and then discharged from the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 For the present invention Figure 1 Schematic structural view of the top-down view;

[0021] Figure 3 Schematic structural view of the front cross-section of the cooling tank of the present invention;

[0022] Figure 4 Schematic structural view of the internal structure of the cooling tank of the present invention;

[0023] Figure 5 Schematic structural view of the exhaust pipe and heat exchange pipe of the present invention;

[0024] Figure 6 Schematic structural view of the front cross-section of the steam tank of the present invention;

[0025] Figure 7 Schematic structural view of the heat exchange medium circulation part of the present invention;

[0026] Figure 8 Schematic structural view of the secondary treatment part and the primary treatment part of the present invention;

[0027] Figure 9 Schematic structural view of the water pipe of the present invention;

[0028] Figure 10 Schematic structural view of the steam delivery part of the present invention.

[0029] In the figure: 1. Exhaust gas inlet pipe; 2. Heat pump; 3. Steam tank; 4. Cooling part; 401. Cooling tank; 402. Water inlet pipe; 403. Water pipe; 5. Heat exchange part; 501. Liquid inlet bin; 502. Liquid discharge bin; 503. Exhaust pipe; 504. Heat exchange pipe; 505. Baffle; 506. Heating pipe; 6. Primary treatment part; 601. Cyclone separator; 602. Booster pump; 603. Connecting pipe 1; 604. Connecting pipe 2; 7. Heat exchange medium circulation part; 701. Circulation pump; 702. Connecting pipe 1; 703. Heat exchange medium storage tank; 704. Connecting pipe 2; 705. Connecting pipe 3; 706. Connecting pipe 4; 8. Secondary treatment part; 801. Connecting pipe 3; 802. Spray tower; 803. Exhaust pipe; 9. Steam delivery part; 901. U-shaped pipe; 902. Buffer tank; 903. Steam outlet pipe; 10. Buffer plate; 11. Check valve. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Embodiment 1

[0032] Please refer to Figures 1-9 . The present invention provides a technical solution: a high-temperature waste gas recycling device, which includes a waste gas inlet pipe 1, a heat pump 2, and a steam tank 3. A cooling section 4 is provided between the waste gas inlet pipe 1 and the heat pump 2, and a heat exchange section 5 is provided inside the cooling section 4 and the steam tank 3. The heat release end of the heat pump 2 is arranged inside the steam tank 3. A primary treatment section 6 is provided between the heat pump 2 and the cooling section 4. The exhaust end of the heat pump 2 is connected and provided with a secondary treatment section 8. The top end of the steam tank 3 is connected and provided with a steam delivery section 9. Before introducing the waste gas into the heat pump 2, the primary treatment section 6 is used to perform primary treatment on the waste gas, so that the waste gas can be stably input into the heat pump 2, and the corrosive particles in the waste gas are treated to avoid damage to the heat pump 2. Before performing primary treatment on the waste gas, the cooling section 4 is used to cool the waste gas to avoid damage to the filtering structure in the primary treatment section 6 caused by high-temperature waste gas. At the same time, the heat exchange section 5 transfers the heat during the cooling process to the inside of the steam tank 3 to heat the water in the steam tank 3. When the heat transferred from the heat exchange section 5 to the inside of the steam tank 3 is not enough to boil the water in the steam tank 3, the heat pump 2 can recover the waste heat in the waste gas and then generate enough heat to boil the water in the steam tank 3, so that the entire waste gas utilization device can continuously generate stable steam;

[0033] The cooling section 4 includes a cooling tank 401. The top end of the cooling tank 401 is connected to the bottom end of the waste gas inlet pipe 1. A water pipe 403 is connected to the front of the cooling tank 401. The end of the water pipe 403 away from the cooling tank 401 is connected to the inside of the steam tank 3. A water inlet pipe 402 is connected to the right outer wall of the cooling tank 401. The waste gas is cooled by the water in the cooling tank 401, and the heated water is introduced into the steam tank 3 through the water pipe 403, so that the water in the steam tank 3 can be heated to the boiling point faster. Water is replenished into the cooling tank 401 through the water inlet pipe 402, and thus the waste gas can be continuously cooled;

[0034] The partition plate 505 separates the interior of the cooling tank 401 into upper and lower cavities. The upper cavity is the liquid inlet chamber 501, and the lower cavity is the liquid discharge chamber 502. The top and bottom ends of the exhaust gas pipe 503 extend out of the liquid inlet chamber 501 and the liquid discharge chamber 502 respectively, and the exhaust gas pipe 503 is not communicated with the liquid inlet chamber 501 and the liquid discharge chamber 502. The top end of the heat exchange pipe 504 is communicated with the interior of the liquid inlet chamber 501, and the bottom end of the heat exchange pipe 504 is communicated with the interior of the liquid discharge chamber 502. The exhaust gas pipe 503 and the heat exchange pipe 504 are spiral pipes, and the exhaust gas pipe 503 and the heat exchange pipe 504 are wound together. There is a heat exchange medium flowing inside the heat exchange pipe 504. The heating pipe 506 is arranged in the steam tank 3. A liquid inlet pipe is communicated and arranged on the left side of the liquid inlet chamber 501, and a liquid outlet pipe is communicated and arranged on the left side of the liquid discharge chamber 502. A heat exchange medium circulation part 7 is communicated and arranged between the heating pipe 506 and the liquid inlet pipe and the liquid outlet pipe. By using the exhaust gas pipe 503 and the heat exchange pipe 504 wound together, when the exhaust gas flows in the exhaust gas pipe 503, it can better exchange heat with the heat exchange medium in the heat exchange pipe 504 through the pipe walls of the exhaust gas pipe 503 and the heat exchange pipe 504. The liquid inlet chamber 501 and the liquid discharge chamber 502 are arranged for the flow of the heat exchange medium in the heat exchange pipe 504, so as to ensure that the heat exchange medium can circulate in the heating pipe 506 and the heat exchange pipe 504 through the heat exchange medium circulation part 7, and then transfer the heat from the exhaust gas to the water in the steam tank 3. Because the exhaust gas pipe 503 is a spiral pipe, on the one hand, it can increase the contact area between the exhaust gas pipe 503 and the heat exchange pipe 504, and on the other hand, it can reduce the flow rate of the exhaust gas in the exhaust gas pipe 503, so that the heat in the exhaust gas has enough time to be transferred to the heat exchange medium;

[0035] The heat exchange medium circulation part 7 includes a circulation pump 701 and a heat exchange medium storage tank 703. The output end of the circulation pump 701 is communicated and arranged with a third connecting pipe 705, and the right end of the third connecting pipe 705 is communicated with the liquid inlet pipe. The input end of the circulation pump 701 is communicated and arranged with a first connecting pipe 702, and the left end of the first connecting pipe 702 is communicated with the top end of the heating pipe 506. The right side of the heat exchange medium storage tank 703 is communicated and arranged with a fourth connecting pipe 706, and the fourth connecting pipe 706 is communicated with the liquid outlet pipe. The left side of the heat exchange medium storage tank 703 is communicated and arranged with a second connecting pipe 704, and the left end of the second connecting pipe 704 is communicated with the bottom end of the heating pipe 506. The heat exchange medium storage tank 703 is arranged for storing the heat exchange medium. By using the circulation pump 701 as a power component, the circulation of the heat exchange medium in the heating pipe 506 and the heat exchange pipe 504 is realized;

[0036] There are six groups of exhaust pipes 503 and heat exchange pipes 504, which are circumferentially arrayed in the cooling tank 401. The heat exchange medium is heat-conducting oil. Compared with water, heat-conducting oil has better and more stable heat conduction performance under high-temperature conditions. The heating pipe 506 is a multi-layer coil pipe, and the adjacent upper and lower coil pipes are connected. Setting the heating pipe 506 as a multi-layer coil pipe can increase the contact area between the heating pipe 506 and water, and increase the flow duration of the heat exchange medium in the heating pipe 506, thereby ensuring that the heat exchange medium can fully exchange heat with water through the wall of the heating pipe 506;

[0037] The inner wall of the cooling tank 401 is fixedly installed with oil flow retarder plates 10. The flow retarder plates 10 are inclined plates, and the flow retarder plates 10 are located above the exhaust pipes 503. There are six flow retarder plates 10, which correspond to the exhaust pipes 503 one by one. Setting the flow retarder plates 10 is used to slow down the flow rate of the exhaust gas on the one hand, and to divert the exhaust gas on the other hand, and evenly disperse the exhaust gas into the six exhaust pipes 503;

[0038] A check valve 11 is provided at the connection between the water pipe 403 and the cooling tank 401. The connection between the water pipe 403 and the cooling tank 401 is located between the liquid inlet chamber 501 and the liquid discharge chamber 502. The connection between the water inlet pipe 402 and the cooling tank 401 is located between the liquid inlet chamber 501 and the liquid discharge chamber 502, so that the water in the cooling tank 401 can only exist between the liquid inlet chamber 501 and the liquid discharge chamber 502, so that the water can contact the uncontacted parts of the exhaust pipes 503 and the heat exchange pipes 504, thereby cooling the exhaust gas;

[0039] The primary treatment unit 6 includes a cyclone separator 601. The input end of the cyclone separator 601 is connected to the inside of the cooling tank 401, and the input end of the cyclone separator 601 is located below the liquid discharge chamber 502. The air outlet end of the cyclone separator 601 is connected with a connecting pipe 603. The left end of the connecting pipe 603 is connected with a booster pump 602. The air outlet end of the booster pump 602 is connected with a connecting pipe 604. The left end of the connecting pipe 604 is connected to the intake end of the heat pump 2. The cyclone separator 601 filters the cooled exhaust gas, separates the corrosive particulate matter in the exhaust gas from the air flow, and the air flow enters the booster pump 602 through the connecting pipe 603, and is pressurized or decompressed by the booster pump 602 and then introduced into the heat pump 2 to ensure that the exhaust gas can continuously and stably enter the heat pump 2.

[0040] Working principle: When in use, the waste gas enters the cooling tank 401 from the waste gas inlet pipe 1. After being diverted by the flow retarder plate 10, it enters the waste gas pipe 503. When the waste gas flows in the waste gas pipe 503, heat exchange is carried out with the heat-conducting oil in the heat exchange pipe 504 through the pipe walls of the waste gas pipe 503 and the heat exchange pipe 504. At the same time, the water in the cooling tank 401 also cools the waste gas. After being cooled, the waste gas enters the cyclone separator 601, and the corrosive particulate matter in it is filtered out by the cyclone separator 601. The filtered air flow enters the booster pump 602 from the connecting pipe 603, and after being pressurized or decompressed by the booster pump 602, it is introduced into the heat pump 2. The heat pump 2 recovers the waste heat in the air flow, and then releases this part of the heat to the steam tank 3 through the heat release end to heat the water. At the same time, the circulation pump 701 is turned on to make the heat-conducting oil circulate in the heat exchange pipe 504 and the heating pipe 506, so that the heat-conducting oil transfers the heat in the waste gas to the water in the steam tank 3, and cooperates with the heat pump 2 to heat the water, making the water boil continuously to generate steam. The water that has been heated in the cooling tank 401 can enter the steam tank 3 through the water pipe 403 to continuously supplement water to the steam tank 3.

[0041] Embodiment 2

[0042] Please refer to Figure 1 、 Figure 2 、 Figure 9 、 Figure 10 As shown in

[0043] The cooling part 4 includes a cooling tank 401. The top of the cooling tank 401 is connected to the bottom of the waste gas inlet pipe 1. A water pipe 403 is connected to the front of the cooling tank 401. The end of the water pipe 403 away from the cooling tank 401 is connected to the inside of the steam tank 3. A water inlet pipe 402 is connected to the right outer wall of the cooling tank 401.

[0044] The heat exchange part 5 includes an exhaust gas pipe 503, heat exchange pipes 504, a partition plate 505, and heating pipes 506. The partition plate 505 is fixedly installed on the inner wall of the cooling tank 401. The partition plate 505 divides the interior of the cooling tank 401 into two upper and lower cavities. The upper cavity is the liquid inlet chamber 501, and the lower cavity is the liquid discharge chamber 502. The top and bottom of the exhaust gas pipe 503 extend out of the liquid inlet chamber 501 and the liquid discharge chamber 502 respectively, and the exhaust gas pipe 503 is not communicated with the liquid inlet chamber 501 and the liquid discharge chamber 502. The top of the heat exchange pipe 504 is communicated with the interior of the liquid inlet chamber 501, and the bottom of the heat exchange pipe 504 is communicated with the interior of the liquid discharge chamber 502. The exhaust gas pipe 503 and the heat exchange pipes 504 are spiral-shaped, and the exhaust gas pipe 503 and the heat exchange pipes 504 are wound together. A heat exchange medium flows inside the heat exchange pipe 504. The heating pipes 506 are arranged in the steam tank 3. A liquid inlet pipe is communicated and arranged on the left side of the liquid inlet chamber 501, and a liquid outlet pipe is communicated and arranged on the left side of the liquid discharge chamber 502. A heat exchange medium circulation part 7 is communicated and arranged between the heating pipes 506 and the liquid inlet pipe and the liquid outlet pipe;

[0045] The heat exchange medium circulation part 7 includes a circulation pump 701 and a heat exchange medium storage tank 703. The output end of the circulation pump 701 is communicated and provided with a third connecting pipe 705. The right end of the third connecting pipe 705 is communicated with the liquid inlet pipe. The input end of the circulation pump 701 is communicated and provided with a first connecting pipe 702. The left end of the first connecting pipe 702 is communicated with the top of the heating pipe 506. The right side of the heat exchange medium storage tank 703 is communicated and provided with a fourth connecting pipe 706. The fourth connecting pipe 706 is communicated with the liquid outlet pipe. The left side of the heat exchange medium storage tank 703 is communicated and provided with a second connecting pipe 704. The left end of the second connecting pipe 704 is communicated with the bottom of the heating pipe 506;

[0046] A one-way valve 11 is arranged at the connection between the water pipe 403 and the cooling tank 401. The connection between the water pipe 403 and the cooling tank 401 is located between the liquid inlet chamber 501 and the liquid discharge chamber 502. The connection between the water inlet pipe 402 and the cooling tank 401 is located between the liquid inlet chamber 501 and the liquid discharge chamber 502;

[0047] The primary treatment part 6 includes a cyclone separator 601. The input end of the cyclone separator 601 is communicated with the interior of the cooling tank 401, and the input end of the cyclone separator 601 is located below the liquid discharge chamber 502. The gas outlet end of the cyclone separator 601 is communicated and provided with a first connecting pipe 603. The left end of the first connecting pipe 603 is communicated and provided with a booster pump 602. The gas outlet end of the booster pump 602 is communicated and provided with a second connecting pipe 604. The left end of the second connecting pipe 604 is communicated with the intake end of the heat pump 2;

[0048] The secondary treatment unit 8 includes a third connecting pipe 801 and a spray tower 802. The top end of the third connecting pipe 801 is connected to the air outlet end of the heat pump 2, and the bottom end of the third connecting pipe 801 is connected to the air inlet end of the spray tower 802. An exhaust pipe 803 is connected to the top end of the spray tower 802. The waste gas with recovered waste heat by the heat pump 2 is introduced into the spray tower 802 through the third connecting pipe 801, and the spray tower 802 is used to spray-treat the waste gas, remove acid and sulfur from the waste gas, and then discharge it from the exhaust pipe 803.

[0049] The steam delivery unit 9 includes a U-shaped pipe 901 and a flow buffer tank 902. One end of the U-shaped pipe 901 is connected to the top end of the steam tank 3, and the other end is connected to the top of the flow buffer tank 902. A steam outlet pipe 903 is connected to the bottom of the flow buffer tank 902. The flow buffer tank 902 is provided to slow down the flow rate of the steam, thereby avoiding too high a steam flow rate.

[0050] Working principle: When in use, before introducing the waste gas into the heat pump 2, the primary treatment unit 6 is used to perform primary treatment on the waste gas, so that the waste gas can be stably input into the heat pump 2 and the corrosive particles in the waste gas can be treated to avoid damage to the heat pump 2. Before performing primary treatment on the waste gas, the cooling unit 4 is used to cool the waste gas to avoid damage to the filtration structure in the primary treatment unit 6 caused by high-temperature waste gas. At the same time, the heat exchange unit 5 transfers the heat during the cooling process to the steam tank 3 to heat the water in the steam tank 3. When the heat transferred from the heat exchange unit 5 to the steam tank 3 is not enough to boil the water in the steam tank 3, the heat pump 2 can recover the waste heat in the waste gas and then generate enough heat to boil the water in the steam tank 3, so that the entire waste gas utilization device can continuously generate stable steam. After the waste gas recovers waste heat through the heat pump 2, it flows from the third connecting pipe 801 to the spray tower 802, and the spray tower 802 is used to spray-treat the waste gas, remove acid and sulfur from the waste gas, and then discharge it from the exhaust pipe 803. The steam generated in the steam tank 3 enters the flow buffer tank 902 through the U-shaped pipe 901 and flows out from the steam outlet pipe 903 after the flow rate is reduced.

[0051] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A high-temperature exhaust gas recycling device, comprising an exhaust gas inlet pipe (1), a heat pump (2), and a steam tank (3), characterized in that: A cooling section (4) is provided between the exhaust gas inlet pipe (1) and the heat pump (2); a heat exchange section (5) is provided inside the cooling section (4) and the steam tank (3); a heat release end of the heat pump (2) is provided inside the steam tank (3); a primary treatment section (6) is provided between the heat pump (2) and the cooling section (4); a secondary treatment section (8) is provided in communication with the exhaust end of the heat pump (2); and a steam transport section (9) is provided in communication with the top end of the steam tank (3); The cooling part (4) comprises a cooling tank (401), the top end of the cooling tank (401) is connected to the bottom end of the exhaust gas inlet pipe (1), the front of the cooling tank (401) is connected to a water pipe (403), one end of the water pipe (403) away from the cooling tank (401) is connected to the interior of the steam tank (3), and the right outer wall of the cooling tank (401) is connected to a water inlet pipe (402); The heat exchange part (5) comprises an exhaust pipe (503), a heat exchange pipe (504), a partition (505), and a heating pipe (506); the partition (505) is fixedly mounted on the inner wall of the cooling tank (401); the partition (505) separates two upper and lower cavities inside the cooling tank (401); the upper cavity is the liquid inlet bin (501), and the lower cavity is the liquid discharge bin (502); the top and bottom ends of the exhaust pipe (503) extend from the liquid inlet bin (501) and the liquid discharge bin (502), respectively; the exhaust pipe (503) is not connected to the liquid inlet bin (501) and the liquid discharge bin (502); the heat exchange pipe (504) The top end of the heat exchange tube (504) is in communication with the interior of the liquid inlet bin (501), the bottom end of the heat exchange tube (504) is in communication with the interior of the liquid discharge bin (502), the exhaust pipe (503) and the heat exchange tube (504) are spiral tubes, and the exhaust pipe (503) and the heat exchange tube (504) are wound together, a heat exchange medium flows in the interior of the heat exchange tube (504), the heating tube (506) is arranged in the steam tank (3), the left side of the liquid inlet bin (501) is in communication with the liquid inlet tube, the left side of the liquid discharge bin (502) is in communication with the liquid outlet tube, and a heat exchange medium circulation unit (7) is arranged between the heating tube (506) and the liquid inlet tube and the liquid outlet tube; The exhaust pipe (503) and the heat exchange pipe (504) are provided in six groups and are distributed in a circular array in the cooling tank (401). The heat exchange medium is heat transfer oil. The heating pipe (506) is a multi-layer coil, and the upper and lower adjacent coils are connected.

2. A high-temperature exhaust gas recycling device according to claim 1, characterized in that: The heat exchange medium circulation part (7) comprises a circulation pump (701) and a heat exchange medium storage box (703); the output end of the circulation pump (701) is connected to a connecting pipe three (705); the right end of the connecting pipe three (705) is connected to the liquid inlet pipe; the input end of the circulation pump (701) is connected to a connecting pipe one (702); the left end of the connecting pipe one (702) is connected to the top end of the heating pipe (506); the right side of the heat exchange medium storage box (703) is connected to a connecting pipe four (706); the connecting pipe four (706) is connected to the liquid outlet pipe; the left side of the heat exchange medium storage box (703) is connected to a connecting pipe two (704); the left end of the connecting pipe two (704) is connected to the bottom end of the heating pipe (506).

3. The high-temperature exhaust gas recycling device according to claim 1, characterized in that: A slow flow plate (10) is fixedly mounted on the inner wall of the cooling tank (401); the slow flow plate (10) is an inclined plate and is located above the exhaust pipe (503); six slow flow plates (10) are provided and correspond one to one with the exhaust pipes (503).

4. The high-temperature exhaust gas recycling device according to claim 1, characterized in that: A one-way valve (11) is provided at the connection point between the water pipe (403) and the cooling tank (401); the connection point between the water pipe (403) and the cooling tank (401) is located between the liquid inlet bin (501) and the liquid discharge bin (502); and the connection point between the water inlet pipe (402) and the cooling tank (401) is located between the liquid inlet bin (501) and the liquid discharge bin (502).

5. The high-temperature exhaust gas recycling device according to claim 1, characterized in that: The primary treatment section (6) comprises a cyclone separator (601), the input end of the cyclone separator (601) being connected to the interior of the cooling tank (401), and the input end of the cyclone separator (601) being located below the liquid drainage bin (502), the air outlet end of the cyclone separator (601) being connected to a connecting pipe 1 (603), the left end of the connecting pipe 1 (603) being connected to a booster pump (602), the air outlet end of the booster pump (602) being connected to a connecting pipe 2 (604), and the left end of the connecting pipe 2 (604) being connected to an air inlet end of the heat pump (2).

6. A high-temperature exhaust gas recycling device according to claim 1, characterized in that: The secondary treatment section (8) comprises a connecting pipe three (801) and a spray tower (802); the top end of the connecting pipe three (801) is connected to the air outlet of the heat pump (2); the bottom end of the connecting pipe three (801) is connected to the air inlet of the spray tower (802); and the top end of the spray tower (802) is connected to an exhaust pipe (803).

7. The high-temperature exhaust gas recycling device according to claim 1, characterized in that: The steam conveying portion (9) comprises a U-shaped tube (901) and a slow-flow tank (902); one end of the U-shaped tube (901) is connected to the top of the steam tank (3), and the other end is connected to the top of the slow-flow tank (902); the bottom of the slow-flow tank (902) is connected to a steam outlet pipe (903).

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