A distillation still waste gas waste heat recovery and desulfurization and denitration integrated device

Abstract

The application discloses a distillation still waste gas waste heat recovery and desulfurization and denitrification integrated device, which comprises a bottom plate, a middle tank and side tanks are fixed on the top of the bottom plate, the number of the side tanks is two and they are respectively located on the two sides of the middle tank, and a rotatable heat exchange spiral pipe is arranged in the middle tank. In the application, the rotatable heat exchange spiral pipe is arranged in the middle tank, then a lifting plate is arranged on the top of the middle tank, a sliding block is arranged below the lifting plate, and a scraper which is adapted to the heat exchange spiral pipe is fixedly connected to the bottom of the sliding block. When the outer wall of the heat exchange spiral pipe is attached with scale and affects the heat conduction efficiency, the lifting plate is controlled to descend so that the scraper is inserted into the heat exchange spiral pipe, then the heat exchange spiral pipe is controlled to rotate, at this time, the scraper moves along the spiral track of the heat exchange spiral pipe, and then the scale which is softened on the outer wall of the heat exchange spiral pipe is scraped off. The application has the advantages that the scale attached to the outer wall of the heat exchange spiral pipe is cleaned more conveniently and quickly.

Description

Technical Field

[0001] This invention relates to the field of distillation kettle exhaust gas treatment technology, and in particular to an integrated device for waste heat recovery, desulfurization and denitrification of distillation kettle exhaust gas. Background Technology

[0002] The exhaust gas emitted from the distillation kettle contains harmful substances that pollute the atmosphere, such as SO2 and NO. x The exhaust gas contains VOCs, dust, etc., and also contains a large amount of heat. In order to meet the requirements of energy conservation and emission reduction, it is usually necessary to perform waste heat recovery and desulfurization and denitrification treatment on the exhaust gas. Among them, desulfurization and denitrification treatment is usually a separate wet treatment. Some treatment equipment also uses a denitrification reactor to enhance the denitrification treatment of the exhaust gas.

[0003] Currently, the mainstream equipment used for waste heat recovery and desulfurization / denitrification treatment of distillation kettle exhaust gas still has shortcomings in use: 1. When recovering waste heat from exhaust gas, the recovery tank is usually filled with water, which contains impurities. Under high temperature, these impurities easily adhere to the outer wall of the spiral heat exchange tubes that transport the exhaust gas. Once the adhesion thickness reaches a certain level, it will seriously affect the heat transfer efficiency. Therefore, it needs to be cleaned regularly. However, due to the spiral structure of the heat exchange tubes, the cleaning operation is extremely inconvenient, time-consuming, and the cleaning effect is poor; 2. Desulfurization and denitrification treatment are usually carried out separately. Specifically, the denitrification agent and desulfurizing agent are contacted with the exhaust gas by spraying or scrubbing. However, this spraying method cannot fully contact the harmful substances in the exhaust gas, resulting in a large amount of harmful substances in the exhaust gas after spraying treatment, which has the defect of low denitrification and desulfurization treatment efficiency.

[0004] Therefore, this invention proposes an integrated device for waste heat recovery and desulfurization and denitrification of distillation kettle exhaust gas. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas includes a base plate. A middle tank and two side tanks are fixed to the top of the base plate. The side tanks are located on opposite sides of the middle tank. A rotatable heat exchange spiral tube is installed inside the middle tank. A rectangular cover is fixed to the top of the middle tank. A lifting plate is installed inside the rectangular cover. A slider and a sealing shaft located below the slider are connected to the bottom of the lifting plate. The sealing shaft and the rectangular cover are rotatably connected, and a channel is opened through its outer peripheral wall. A scraper adapted to be inserted into the heat exchange spiral tube is fixed to the bottom of the slider. A kneading assembly and a venting pipe assembly located below the kneading assembly are installed inside the side tanks. The kneading assembly is used to knead air bubbles. An exhaust pipe is fixed to the top of the side tanks.

[0007] As a further description of the above technical solution: A guide rail is provided below the lifting plate. The two ends of the guide rail are fixedly connected to the lifting plate through ear plates. The slider is sleeved on the outside of the guide rail. A magnet is fixed on the side of the ear plate facing the slider. Magnetic suction plates are fixed on both ends of the slider.

[0008] As a further description of the above technical solution: The top wall of the lifting plate is fixed with a connecting beam located above the rectangular cover by guide columns. Electric push rods are fixed at both ends of the rectangular cover, and the output shaft end of the electric push rod is fixedly connected to the connecting beam.

[0009] As a further description of the above technical solution: The heat exchange spiral tube has a rectangular cross-section, and the scraper is U-shaped with a U-shaped scraper strip fixed inside.

[0010] As a further description of the above technical solution: An expansion cylinder is fixed on the rectangular cover and fitted around the sealing shaft. A sealing sleeve adapted to the outer peripheral wall of the sealing shaft is fixedly fitted inside the expansion cylinder. Positioning shafts that are rotatably connected to both sides of the rectangular cover are fixed at both ends of the sealing shaft.

[0011] As a further description of the above technical solution: The heat exchange spiral tube is fixed with coaxial connecting tubes at both ends, and the intermediate tank is fixed with support sleeves sleeved outside the connecting tubes at both ends. The support sleeves and connecting tubes are rotatably and sealingly fitted. The intermediate tank is fixed with connecting sleeves sleeved outside the connecting tubes at both ends by a grooved frame. The connecting tubes and connecting sleeves are rotatably and sealingly connected.

[0012] As a further description of the above technical solution: The kneading assembly includes an outer cylinder and an inner cylinder. The two ends of the outer cylinder are fixedly connected to the two ends inside the side tank. The inner cylinder is fitted inside the outer cylinder and is rotatably connected to the side tank. The inner circumferential wall of the outer cylinder is fixed with a number of inner brush strips arranged in a circle. The outer circumferential wall of the inner cylinder is fixed with a number of outer brush strips arranged in a circle. The bottom of the outer cylinder is fixed with two inclined plates that are fixed to the outer circumference and the inner wall of the side tank. The two inclined plates form a figure-eight shape. The top of the outer cylinder has a rectangular air outlet box and the bottom wall has a rectangular air inlet notch located between the two inclined plates.

[0013] As a further description of the above technical solution: The inner cylinder is fixed with coaxial drive shafts at both ends, and the side tank is fixed with positioning sleeves fitted outside the drive shafts at both ends. The positioning sleeves and the drive shafts are rotatably and sealingly connected.

[0014] As a further description of the above technical solution: The venting pipe assembly includes a horizontal pipe and an air inlet pipe fixed to the bottom of the horizontal pipe. The air inlet pipe penetrates the bottom wall of the side tank and the two are fixedly connected. A row of branch pipes is fixed to the top of the horizontal pipe.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, a rotatable heat exchange spiral tube is installed inside the intermediate tank, and a lifting plate is installed at the top of the intermediate tank. A slider is installed below the lifting plate, and a scraper that is compatible with the heat exchange spiral tube is fixedly connected to the bottom of the slider. When scale deposits on the outer wall of the heat exchange spiral tube affect the heat transfer efficiency, the lifting plate is lowered to allow the scraper to connect with the heat exchange spiral tube. Then, the heat exchange spiral tube is rotated, and the scraper moves along the spiral trajectory of the heat exchange spiral tube to scrape off the softened scale deposits on the outer wall of the heat exchange spiral tube. This arrangement has the advantage of making it more convenient and faster to clean the scale deposits on the outer wall of the heat exchange spiral tube.

[0016] 2. In this invention, a rectangular cover located outside the lifting plate is fixedly connected to the top of the middle tank. The sealing shaft and the rectangular cover are rotatably sealed together. Then, a channel is opened through the outer wall of the sealing shaft so that the lifting plate, the slider, and the scraper can pass through. When the sealing shaft is rotated, the opening and closing of the rectangular cover and the inner cavity of the middle tank can be controlled. This arrangement allows the scraper and the slider to be protected inside the rectangular cover when not in use, so that they are not affected by high temperature air, making it more practical.

[0017] 3. In this invention, two side tanks are provided, and a kneading assembly for refining and dispersing waste bubbles is provided inside the side tanks. The kneading assembly includes an inner cylinder and an outer cylinder, wherein outer brush strips and inner brush strips are fixedly arranged in a ring on the opposite peripheral walls of the inner cylinder and the outer cylinder, respectively. The inner cylinder can rotate relative to the outer cylinder. When the inner cylinder rotates, the outer brush strips and inner brush strips will generate the effect of kneading large bubbles. This effect allows harmful substances in the waste gas to come into full contact with the denitrification agent or desulfurization agent, which greatly improves the efficiency of desulfurization and denitrification treatment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas proposed in this invention; Figure 2 for Figure 1 A schematic diagram of the middle tank and side tanks after being cut open; Figure 3 for Figure 2 A magnified view of the "a" in the middle; Figure 4 This is a distribution diagram of the heat exchange spiral tube, slider, scraper and lifting plate of an integrated device for waste heat recovery, desulfurization and denitrification of distillation kettle exhaust gas proposed in this invention; Figure 5 This is a schematic diagram of the kneading assembly and ventilation pipe assembly of an integrated device for waste heat recovery, desulfurization and denitrification of distillation kettle exhaust gas proposed in this invention; Figure 6 for Figure 5 A magnified view of the "c" in the middle; Figure 7 for Figure 5 The diagram at the top.

[0019] Legend: 1. Base plate; 2. Middle tank; 21. Support sleeve; 22. Connecting sleeve; 3. Side tank; 31. Vent pipe; 33. Positioning sleeve; 4. Vent pipe assembly; 41. Horizontal pipe; 411. Diverter pipe; 42. Inlet pipe; 5. Heat exchange spiral pipe; 51. Connecting pipe; 6. Rectangular cover; 61. Expansion cylinder; 62. Sealing sleeve; 7. Slider; 71. Magnetic suction plate; 8. Sealing shaft; 81. Channel; 82. Positioning shaft; 9. Scraper; 91. U-shaped scraper; 101, kneading assembly; 1011, outer cylinder; 10111, inner brush strip; 10112, inclined plate; 10113, rectangular air outlet box; 10114, rectangular air inlet notch; 1012, inner cylinder; 10121, outer brush strip; 10122, drive shaft; 103, lifting plate; 1031, guide rail; 1032, connecting beam; 104, ear plate; 1041, magnet; 105, electric push rod. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-7 An integrated device for waste heat recovery and desulfurization / denitrification of distillation kettle exhaust gas includes a base plate 1. A central tank 2 and two side tanks 3 are fixed to the top of the base plate 1. The central tank 2 provides space for waste heat recovery. Two side tanks 3 are located on either side of the central tank 2. One side tank 3 is for waste gas denitrification treatment, and the other is for desulfurization treatment. A rotatable heat exchange spiral tube 5 is installed inside the central tank 2. A heat exchange medium, such as water, is injected into the central tank 2. The heat exchange spiral tube 5 is contained within the medium, and high-temperature waste gas flows through it. The heat energy in the waste gas, conducted through the heat exchange spiral tube 5, raises the temperature of the medium, thus achieving waste heat recovery from the waste gas.

[0022] The outer wall of the middle tank 2 is fixedly connected to the medium inlet pipe, the medium outlet pipe, the cleaning agent inlet pipe, and the sewage discharge pipe. Solenoid valves are connected in series on the medium inlet pipe, the medium outlet pipe, the cleaning agent inlet pipe, and the sewage discharge pipe.

[0023] In this technical solution, a rectangular cover 6 is fixed on the top of the intermediate tank 2. The bottom of the rectangular cover 6 is connected to the inner cavity of the intermediate tank 2. A lifting plate 103 is provided inside the rectangular cover 6. A slider 7 and a sealing shaft 8 located below the slider 7 are connected to the bottom of the lifting plate 103. In specific implementation, a guide rail 1031 is provided below the lifting plate 103. The two ends of the guide rail 1031 are fixedly connected to the lifting plate 103 through ear plates 104. The slider 7 is sleeved on the outside of the guide rail 1031. When the lifting plate 103 moves up and down, it drives the slider 7 to move up and down as well. The sealing shaft 8 and the rectangular cover 6 are rotatably connected, and a channel 81 is opened through its outer peripheral wall. The function of the sealing shaft 8 is to control the connection and blockage between the rectangular cover 6 and the middle tank 2 when it rotates. The bottom of the slider 7 is fixed with a scraper 9 that is compatible with the heat exchange spiral tube 5. The lifting plate 103 carries the slider 7 and the scraper 9 and can pass up and down through the channel 81 in the compatible position. The function of the scraper 9 is to clean the heat insulation material (such as scale) attached to the outer wall of the heat exchange spiral tube 5. When the heat exchange spiral tube 5 rotates, the scraper 9 connected to the heat exchange spiral tube 5 will move along the heat exchange spiral tube 5. At this time, the slider 7 will move passively, thereby increasing the coverage area for descaling the heat exchange spiral tube 5. It should be noted that the setting of the sealing shaft 8 can separate the space between the rectangular cover 6 and the middle tank 2. After separation, the influence of high temperature water vapor on the sliding pair of the slider 7 and the lifting plate 103 can be avoided.

[0024] Furthermore, a magnet 1041 is fixed on the side of the ear plate 104 facing the slider 7, and magnetic plates 71 are fixed at both ends of the slider 7. The ear plate 104 positions the slider 7 by magnetism, so that the slider 7 can always remain stationary relative to the lifting plate 103 when it is not in operation. This arrangement facilitates the precise insertion of the scraper 9 below the slider 7 and the spiral body of the heat exchange spiral tube 5.

[0025] The rotation of the heat exchange spiral tube 5 is controlled by a servo motor to precisely control the number of rotations of the heat exchange spiral tube 5. Specifically, coaxial connecting pipes 51 are fixed at both ends of the heat exchange spiral tube 5, and support sleeves 21 fitted outside the connecting pipes 51 are fixed at both ends of the intermediate tank 2. The support sleeves 21 and the connecting pipes 51 are rotatably and sealingly fitted. In practice, common bearings and waterproof components (such as sealing sleeves and sealing rings) are installed between the support sleeves 21 and the connecting pipes 51. Connecting sleeves 22 fitted outside the connecting pipes 51 are fixed at both ends of the intermediate tank 2 by a slotted frame. The connecting pipes 51 and the connecting sleeves 22 are rotatably and sealingly connected. The rotatable sealing fit here can also use the aforementioned bearings and waterproof components. The function of the connecting sleeves 22 is to connect the exhaust gas transmission pipeline. A driven gear is fixedly fitted outside the intermediate tank 2 on the outside of one of the connecting pipes 51, and a control motor is fixedly installed at one end of the intermediate tank 2. The output shaft of the control motor is fixedly connected to a driving gear that meshes with the driven gear.

[0026] In this embodiment, the heat exchange spiral tube 5 has a rectangular cross-section, and the scraper 9 is U-shaped with a U-shaped scraper strip 91 fixed inside. This arrangement makes the scraper 9 more comprehensive and thorough in scraping and removing scale from the outer wall of the spiral part of the heat exchange spiral tube 5.

[0027] The top wall of the lifting plate 103 is fixed with a connecting beam 1032 located above the rectangular cover 6 via guide columns. The guide columns are installed through the top wall of the rectangular cover 6 and the two slide up and down in cooperation. Electric push rods 105 are fixed at both ends of the rectangular cover 6. The output shaft end of the electric push rod 105 is fixedly connected to the connecting beam 1032. When the electric push rod 105 moves, it can control the lifting of the connecting beam 1032, and thus control the lifting of the lifting plate 103.

[0028] An expansion cylinder 61 is fixed on the rectangular cover 6 and sleeved on the outside of the sealing shaft 8. A sealing sleeve 62 adapted to the outer peripheral wall of the sealing shaft 8 is fixedly sleeved inside the expansion cylinder 61. The outer wall of the sealing sleeve 62 has a notch adapted to the channel 81. The sealing sleeve 62 makes a sealing fit between the sealing shaft 8 and the expansion cylinder 61. Positioning shafts 82 that are rotatably connected to the two sides of the rectangular cover 6 are fixed at both ends of the sealing shaft 8. When the positioning shafts 82 rotate, they can drive the sealing shaft 8 to rotate. A control motor 2 can be fixedly installed on one end of the rectangular cover 6 through a slotted plate. The output shaft of the control motor 2 is fixedly connected to one end of one of the positioning shafts 82. The control motor 2 is a servo motor. After the control motor 2 is started, it can control the rotation of the sealing shaft 8.

[0029] The side tank 3 is equipped with a kneading assembly 101 and a ventilation pipe assembly 4 located below the kneading assembly 101. The kneading assembly 101 is used to knead the air bubbles. The top of the side tank 3 is fixed with an exhaust pipe 31. The function of the ventilation pipe assembly 4 is to evenly guide the waste gas to be treated into the area below the kneading assembly 101. After the kneading action, the air bubbles in the treatment agent (desulfurization or denitrification) of the waste gas are further refined and dispersed, so that the treatment agent and the harmful substances in the waste gas come into more comprehensive contact, thereby improving the efficiency of denitrification and desulfurization treatment. The gas after desulfurization or denitrification treatment will be discharged through the corresponding exhaust pipe 31.

[0030] Specifically, the kneading assembly 101 includes an outer cylinder 1011 and an inner cylinder 1012. The two ends of the outer cylinder 1011 are fixedly connected to the two ends inside the side tank 3. The inner cylinder 1012 is fitted inside the outer cylinder 1011 and rotatably connected to the side tank 3. A plurality of circumferentially distributed inner brush strips 10111 are fixed to the inner circumferential wall of the outer cylinder 1011, and a plurality of circumferentially distributed outer brush strips 10121 are fixed to the outer circumferential wall of the inner cylinder 1012. Both the inner brush strips 10111 and the outer brush strips 10121 are composed of a positioning plate and bristles adhered to one side of the positioning plate. When the inner cylinder 1012 rotates, the inner brush strips 1011... The inner and outer brush strips 10121 will press against each other and be offset. Two inclined plates 10112 are fixed to the bottom of the outer cylinder 1011 and the inner wall of the side tank 3, forming a figure-eight shape. A rectangular air outlet box 10113 is opened at the top of the outer cylinder 1011, and a rectangular air inlet notch 10114 is opened on the bottom wall between the two inclined plates 10112. The two inclined plates 10112 guide the exhaust gas to rise and enter the outer cylinder 1011 through the rectangular air inlet notch 10114. When the inner cylinder 1012 rotates, the inner brush strips 10111 and outer brush strips 10121 will rub the air bubbles. The treated gas will be discharged through the air outlet pipe 31.

[0031] In this embodiment, the vent pipe assembly 4 includes a horizontal pipe 41 and an air inlet pipe 42 fixed to the bottom of the horizontal pipe 41. The air inlet pipe 42 penetrates the bottom wall of the side tank 3 and the two are fixedly connected. The bottom of the air inlet pipe 42 is connected to the exhaust gas transmission pipeline. A row of diversion pipes 411 is fixed to the top of the horizontal pipe 41. After the exhaust gas enters the air inlet pipe 42, the exhaust gas enters the horizontal pipe 41 and is then discharged through each diversion pipe 411.

[0032] Furthermore, coaxial drive shafts 10122 are fixed at both ends of the inner cylinder 1012, and positioning sleeves 33 are fixed at both ends of the side tank 3, which are sleeved on the outside of the drive shafts 10122. The positioning sleeves 33 and the drive shafts 10122 are rotatably and sealingly connected. When the drive shafts 10122 rotate, they can drive the inner cylinder 1012 to rotate. In specific implementation, a control motor 3 can be fixedly installed at one end of the side tank 3 through a base. The control motor 3 provides driving force to the rotation of the drive shafts 10122. The control motor 3 is a servo motor, which facilitates the adjustment of the rotation speed of the inner cylinder 1012.

[0033] After desulfurization and denitrification, the gas can be directly discharged after being filtered through a high-efficiency activated carbon filter. The discharged gas will not cause air pollution. The high-efficiency activated carbon filter can further filter out harmful substances and odors in the gas.

[0034] In this embodiment, exhaust fan one transmits the exhaust gas from the distillation kettle to a connecting sleeve 22 through pipe one. Another connecting sleeve 22 is connected to the air inlet pipe 42 below one of the side tanks 3 through pipe two. The air outlet pipe 31 at the top of the side tank 3 is connected to the air inlet pipe 42 below the other side tank 3 through pipe three. Then, the air outlet pipe 31 at the top of the side tank 3 is connected to a high-efficiency activated carbon filter through pipe four. Finally, an exhaust fan two is installed at the air outlet of the high-efficiency activated carbon filter to increase the airflow transmission rate.

[0035] Working principle: During use, the inner cylinder 1012 is controlled to rotate or reciprocate. After the exhaust gas enters the heat exchange spiral tube 5, the heat exchange spiral tube 5 and the heat exchange medium in the middle tank 2 exchange heat to achieve waste heat recovery. The exhaust gas in the heat exchange spiral tube 5 will enter the horizontal pipe 41 in one of the side tanks 3, and then be discharged into the denitrification agent through a row of diversion pipes 411, forming large bubbles. The large bubbles rise and, guided by the two inclined plates 10112, enter the rectangular air inlet 10114. Then, they rise through the gap between the inner cylinder 1012 and the outer cylinder 1011, and are then discharged into the denitrification agent. The rubbing action of the inner brush strip 10111 and the outer brush strip 10121 further disperses and refines the waste bubbles, allowing the harmful substances in the waste gas to come into full contact with the denitrification agent. The harmful substances (including dust) are trapped in the denitrification agent. The denitrified waste gas floats up and rises to the surface of the denitrification agent through the rectangular exhaust box 10113, and then is discharged through the corresponding exhaust pipe 31. After being discharged, it enters another side tank 3, which contains a desulfurizing agent. Similarly, the waste gas will be desulfurized. The desulfurized waste gas will be discharged through a high-efficiency activated carbon filter.

[0036] After a period of use, the scale adhering to the outer wall of the heat exchange spiral tube 5 needs to be cleaned. First, the medium in the empty tank 2 is drained, and then a cleaning solution for softening the scale is injected into the middle tank 2. The heat exchange spiral tube 5 is immersed in the cleaning solution. After a certain period of immersion, the sealing shaft 8 is rotated so that the channel 81 is in a state of connecting the rectangular cover 6 and the inner cavity of the middle tank 2. Then, the lifting plate 103 is lowered, and the scraper 9 is lowered and passes through the channel 81. It is then attached to one end of the spiral part of the heat exchange spiral tube 5. Then, the connecting pipe 51 is rotated. At this time, the heat exchange spiral tube 5 rotates, and the U-shaped scraper 91 in the scraper 9 will scrape the spiral outer wall of the heat exchange spiral tube 5. At the same time, the slider 7 will be passively slid along the guide rail 1031. This process can make the softened scale detach from the outer wall of the heat exchange spiral tube 5. After cleaning, the cleaning solution is discharged, and then the circulating heat exchange medium is injected back into the middle tank 2 to continue the waste heat recovery.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated device for waste heat recovery and desulfurization / denitrification of distillation kettle exhaust gas, comprising a base plate (1), characterized in that, The top of the base plate (1) is fixed with a middle tank (2) and a side tank (3). There are two side tanks (3) and they are located on both sides of the middle tank (2). The middle tank (2) is equipped with a rotatable heat exchange spiral tube (5). The top of the middle tank (2) is fixed with a rectangular cover (6). The rectangular cover (6) is equipped with a lifting plate (103). The bottom of the lifting plate (103) is connected to a slider (7) and a sealing shaft (8) located below the slider (7). The sealing shaft (8) and the rectangular cover (6) are rotatably connected and a channel (81) is opened through its outer peripheral wall. The bottom of the slider (7) is fixed with a scraper (9) that is compatible with the heat exchange spiral tube (5). The side tank (3) is equipped with a kneading assembly (101) and a venting pipe assembly (4) located below the kneading assembly (101). The kneading assembly (101) is used to knead the air bubbles. The top of the side tank (3) is fixed with an air outlet pipe (31).

2. The integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas according to claim 1, characterized in that, A guide rail (1031) is provided below the lifting plate (103). The two ends of the guide rail (1031) are fixedly connected to the lifting plate (103) through ear plates (104). The slider (7) is sleeved on the outside of the guide rail (1031). A magnet (1041) is fixed on the side of the ear plate (104) facing the slider (7). Magnetic suction plates (71) are fixed at both ends of the slider (7).

3. The integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas according to claim 2, characterized in that, The top wall of the lifting plate (103) is fixed with a connecting beam (1032) located above the rectangular cover (6) by a guide column. Electric push rods (105) are fixed at both ends of the rectangular cover (6). The output shaft end of the electric push rod (105) is fixedly connected to the connecting beam (1032).

4. The integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas according to claim 1, characterized in that, The heat exchange spiral tube (5) has a rectangular cross-section, and the scraper (9) is U-shaped with a U-shaped scraper strip (91) fixed inside.

5. The integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas according to claim 1, characterized in that, An expansion cylinder (61) is fixed on the rectangular cover (6) and sleeved outside the sealing shaft (8). A sealing sleeve (62) adapted to the outer peripheral wall of the sealing shaft (8) is fixedly sleeved inside the expansion cylinder (61). Positioning shafts (82) that are rotatably connected to both sides of the rectangular cover (6) are fixed at both ends of the sealing shaft (8).

6. The integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas according to claim 1, characterized in that, The heat exchange spiral tube (5) is fixed with coaxial connecting tubes (51) at both ends. The middle tank (2) is fixed with support sleeves (21) sleeved outside the connecting tubes (51) at both ends. The support sleeves (21) and the connecting tubes (51) are rotatably sealed and adapted. The middle tank (2) is fixed with connecting sleeves (22) sleeved outside the connecting tubes (51) at both ends by a grooved frame. The connecting tubes (51) and the connecting sleeves (22) are rotatably sealed and connected.

7. The integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas according to claim 1, characterized in that, The kneading assembly (101) includes an outer cylinder (1011) and an inner cylinder (1012). The two ends of the outer cylinder (1011) are fixedly connected to the two ends inside the side tank (3). The inner cylinder (1012) is fitted inside the outer cylinder (1011) and is rotatably connected to the side tank (3). The inner circumferential wall of the outer cylinder (1011) is fixed with a plurality of circumferentially distributed inner brush strips (10111). The outer circumferential wall of the inner cylinder (1012) is... A number of outer brush strips (10121) are fixedly arranged around the outer cylinder (1011). Two inclined plates (10112) are fixed to the bottom of the outer cylinder (1011) and the inner wall of the side tank (3). The two inclined plates (10112) form a figure-eight shape. A rectangular air outlet box (10113) is opened at the top of the outer cylinder (1011) and a rectangular air inlet notch (10114) is opened at the bottom wall between the two inclined plates (10112).

8. The integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas according to claim 7, characterized in that, The inner cylinder (1012) has a coaxial drive shaft (10122) fixed at both ends, and the side tank (3) has a positioning sleeve (33) fitted outside the drive shaft (10122) fixed at both ends. The positioning sleeve (33) and the drive shaft (10122) are rotatably sealed together.

9. The integrated device for waste heat recovery, desulfurization, and denitrification of distillation kettle exhaust gas according to claim 1, characterized in that, The ventilation pipe assembly (4) includes a horizontal pipe (41) and an air inlet pipe (42) fixed at the bottom of the horizontal pipe (41). The air inlet pipe (42) penetrates the bottom wall of the side tank (3) and the two are fixedly connected. A row of diversion pipes (411) is fixed at the top of the horizontal pipe (41).

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