Flue gas graded cooling heat recycling system
By installing an arc-shaped scraper driven by an electric motor inside the heat exchange tube to remove dust from the inner wall of the heat exchange tube, and using a guide plate to collect the dust, the problem of particulate impurities affecting heat exchange is solved, and the efficiency of flue gas waste heat recovery and dust removal effect are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-04-14
AI Technical Summary
During the waste heat recovery process of flue gas, particulate impurities are prone to adhere to the surface of heat exchange tubes, and long-term accumulation affects the heat exchange effect.
An electric motor inside the heat exchange tube drives an arc-shaped scraper to clean the inner wall of the heat exchange tube. Combined with a guide plate to collect dust, this prevents secondary adsorption and improves heat exchange efficiency.
It effectively removes particulate dust from the inner wall of the heat exchange tube, improves the heat exchange effect between flue gas and cold water, enhances the dust removal effect, and prevents dust from being stirred up.
Smart Images
Figure CN224121256U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas recovery technology, specifically to a flue gas staged cooling heat recovery and utilization system. Background Technology
[0002] In waste incineration and industrial production processes, flue gas emissions typically carry a large amount of high-temperature waste heat. Direct emission of this waste heat not only wastes energy but also causes thermal pollution to the environment. Currently, the industry is paying increasing attention to the recovery and utilization of flue gas waste heat, and various waste heat recovery technologies are emerging, such as waste heat boilers and heat pipe heat exchangers. Flue gas staged cooling heat recovery and utilization systems effectively recover waste heat resources in flue gas through multi-stage cooling treatment and convert them into reusable energy forms, thereby significantly reducing energy consumption in industrial production processes.
[0003] Currently, when used for heat recovery from waste flue gas, the presence of particulate impurities in the waste flue gas can cause these impurities to adhere to the surface of the heat exchange tubes during heat exchange, and long-term accumulation can easily affect the heat exchange effect.
[0004] Therefore, it is necessary to invent a flue gas staged cooling and heat recovery system to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a flue gas staged cooling and heat recovery system to solve the problem that particulate impurities easily adhere to the surface of heat exchange tubes and accumulate over time, which can affect the heat exchange effect.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a flue gas staged cooling and heat recovery system, comprising a first exhaust pipe, a first baffle plate fixedly connected to the upper end of the first exhaust pipe, a heat exchange assembly provided on the upper side of the first exhaust pipe, the heat exchange assembly comprising an ash collection cylinder, a heat exchange cylinder, a baffle plate, a heat exchange tube, heat exchange fins, a water inlet pipe, a drain pipe, an electric motor, a transmission rod, a connecting rod, and an arc-shaped scraper, a sealing sleeve fixedly connected to the lower end of the ash collection cylinder, the sealing sleeve being fixed to the surface of the first exhaust pipe, and the heat exchange cylinder being fixed to the upper end of the ash collection cylinder.
[0007] By adopting the above technical solution, the cold water inside the heat exchange cylinder exchanges heat with the flue gas inside the heat exchange tube through the heat exchange fins, cooling the flue gas and heating the cold water at the same time. After a period of heat exchange, the electric motor is started. The electric motor drives the arc-shaped scraper to rotate closely against the inner wall of the heat exchange tube through the transmission rod, scraping off the particulate dust adsorbed on the inner wall of the heat exchange tube, so that the heat of the flue gas can be directly exchanged with the cold water through the heat exchange tube and heat exchange fins, thereby improving the heat exchange effect.
[0008] Optionally, the partition is fixed inside the heat exchange cylinder near the upper side, and multiple sets of heat exchange tubes are fixedly connected between the partition and the bottom wall of the heat exchange cylinder, and multiple sets of heat exchange fins are fixedly connected between the multiple sets of heat exchange tubes.
[0009] By adopting the above technical solution, the baffle divides the heat exchange cylinder into two parts: the upper part of the baffle is the smoke collection chamber, and the lower part of the baffle is the heat exchange chamber. The heat exchange fins are used to quickly transfer the heat in the flue gas to the interior of the cold water, thereby further improving the heat exchange efficiency.
[0010] Optionally, multiple sets of electric motors are fixedly installed on the upper end of the heat exchange cylinder, and a device housing is fitted around the outside of the electric motors. The device housing is fixedly connected to the upper end of the heat exchange cylinder.
[0011] By adopting the above technical solution, the equipment housing is used to protect the electric motor.
[0012] Optionally, each of the heat exchange tubes is equipped with a transmission rod inside, and the upper end of the transmission rod is fixedly connected to the output end of the electric motor.
[0013] By adopting the above technical solution, the output end of the electric motor drives the transmission rod to rotate.
[0014] Optionally, three sets of connecting rods are fixedly connected to the surface of the transmission rod, and two sets of symmetrically distributed arc-shaped scrapers are fixedly connected between the three sets of connecting rods.
[0015] By adopting the above technical solution, the arc-shaped scraper is closely attached to the inner wall of the heat exchange tube, and the transmission rod drives the arc-shaped scraper to rotate through three sets of connecting rods.
[0016] Optionally, the water inlet pipe is fixedly connected to the left side of the heat exchange cylinder, located below the partition, and the drain pipe is fixedly connected to the right side of the heat exchange cylinder, near the lower end.
[0017] By adopting the above technical solution, the water inlet pipe is used to send cold water into the interior of the heat exchange cylinder, and the hot water after heat exchange is discharged through the drain pipe.
[0018] Optionally, a first guide plate is fixedly connected to the outer surface of the first exhaust duct near the upper end, and a second guide plate is fixedly connected to the inner wall of the ash collection cylinder at the same height as the first guide plate. The side wall of the ash collection cylinder is provided with a cleaning port, and a sealing plate is hinged inside the cleaning port.
[0019] By adopting the above technical solution, the dust collection cylinder is used to collect scraped particulate dust. The dust slides down to the lower end of the dust collection cylinder through the first guide plate and the second guide plate. Both sets of guide plates are inclined to prevent the exhaust gas from raising the scraped dust particles. When there is too much particulate dust at the bottom of the dust collection cylinder, the sealing plate can be opened to clean the collected dust through the dust removal port.
[0020] Optionally, a second exhaust pipe is fixedly connected to the upper end of the heat exchange cylinder, and a second baffle is fixedly connected to the upper end of the second exhaust pipe.
[0021] By adopting the above technical solution, the flue gas cooled by the heat exchange tube is collected in the flue gas collection chamber and then discharged from the second flue gas duct.
[0022] The technical effects and advantages provided by this utility model in the above technical solution are as follows:
[0023] 1. In this utility model, after the heat exchange tube has been exchanging heat for a period of time, the electric motor is started. The electric motor drives the arc-shaped scraper to rotate closely against the inner wall of the heat exchange tube through the transmission rod, scraping off the particulate dust adsorbed on the inner wall of the heat exchange tube, so that the heat of the flue gas can be directly exchanged with the cold water through the heat exchange tube and heat exchange fins, thereby improving the heat exchange effect.
[0024] 2. This utility model utilizes the cooperation of the first guide plate and the second guide plate to facilitate the collection of scraped particulate dust, prevent the emitted flue gas from being stirred up, avoid secondary adsorption, and improve the dust removal effect. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0026] Figure 2 This is a schematic diagram of the internal structure of the ash collection cylinder of this utility model;
[0027] Figure 3 This is a schematic diagram of the internal structure of the heat exchanger cylinder of this utility model;
[0028] Figure 4 This is a schematic diagram of the heat exchange tube structure of this utility model;
[0029] Figure 5 This is a schematic diagram of the arc-shaped scraper structure of this utility model.
[0030] Explanation of reference numerals in the attached figures:
[0031] 1. First exhaust duct; 11. First guide plate; 12. First baffle plate; 2. Ash collection cylinder; 21. Second guide plate; 22. Sealing sleeve; 23. Sealing plate; 3. Heat exchange cylinder; 31. Partition plate; 32. Heat exchange tube; 33. Heat exchange fins; 34. Water inlet pipe; 35. Drainage pipe; 36. Equipment shell; 37. Electric motor; 38. Transmission rod; 39. Connecting rod; 310. Arc-shaped scraper; 4. Second exhaust duct; 41. Second baffle plate. Detailed Implementation
[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0033] This utility model provides, for example Figures 1 to 5 The flue gas staged cooling and heat recovery system shown includes a first exhaust pipe 1, with a first baffle plate 12 fixedly connected to the upper end of the first exhaust pipe 1. A heat exchange assembly is provided on the upper side of the first exhaust pipe 1, including an ash collection cylinder 2, a heat exchange cylinder 3, a baffle plate 31, a heat exchange tube 32, heat exchange fins 33, a water inlet pipe 34, a drain pipe 35, an electric motor 37, a transmission rod 38, a connecting rod 39, and an arc-shaped scraper 310. A sealing sleeve 22 is fixedly connected to the lower end of the ash collection cylinder 2, and the sealing sleeve 22 is fixed to the surface of the first exhaust pipe 1. The heat exchange cylinder 3 is fixed to the upper end of the ash collection cylinder 2. A second exhaust pipe 4 is fixedly connected to the upper end of the heat exchange cylinder 3, and a second baffle plate 41 is fixedly connected to the upper end of the second exhaust pipe 4. The water inlet pipe 34 is fixedly connected to the left side of the heat exchange cylinder 3 at a position below the baffle plate 31, and the drain pipe 35 is fixedly connected to the right side of the heat exchange cylinder 3 near the lower end.
[0034] The first exhaust pipe 1 is fixedly connected to the exhaust port in the furnace body. The flue gas inside the furnace body is discharged outward through the first exhaust pipe 1. Then, the flue gas is discharged from the first exhaust pipe 1 and the first baffle plate 12 into the interior of the ash collection cylinder 2. The flue gas inside the ash collection cylinder 2 is discharged to the upper end of the heat exchange cylinder 3 through multiple sets of heat exchange tubes 32, and then discharged through the second exhaust pipe 4.
[0035] Meanwhile, during the flue gas exhaust process, cold water is transported to the interior of the heat exchange tube 3 through the water inlet pipe 34. At this time, the heat exchange tube 32 and the heat exchange fins 33 work together to exchange heat with the cold water. The cold water cools the flue gas, and the high temperature inside the flue gas heats the cold water. When the temperature of the cold water rises, it is discharged from the drain pipe 35 to improve resource utilization efficiency. During the heat exchange process, the electric motor 37, the transmission rod 38 and the arc scraper 310 work together to clean the inner wall of the heat exchange tube 32, thereby improving the heat exchange effect.
[0036] See Figures 3 to 5 The partition plate 31 is fixed inside the heat exchange cylinder 3 near the upper side. Multiple sets of heat exchange tubes 32 are fixedly connected between the partition plate 31 and the bottom wall of the heat exchange cylinder 3. Multiple sets of heat exchange fins 33 are fixedly connected between the multiple sets of heat exchange tubes 32. Multiple sets of electric motors 37 are fixedly installed at the upper end of the heat exchange cylinder 3. An equipment shell 36 is sleeved on the outside of the electric motor 37. The equipment shell 36 is fixedly connected to the upper end of the heat exchange cylinder 3. Each set of heat exchange tubes 32 is provided with a transmission rod 38. The upper end of the transmission rod 38 is fixedly connected to the output end of the electric motor 37. Three sets of connecting rods 39 are fixedly connected to the surface of the transmission rod 38. Two sets of symmetrically distributed arc-shaped scrapers 310 are fixedly connected between the three sets of connecting rods 39.
[0037] Specifically, during the cleaning process inside the heat exchange tube 32, multiple sets of electric motors 37 are started. The output end of the electric motor 37 drives the transmission rod 38 to rotate clockwise. The transmission rod 38 drives the three sets of connecting rods 39 on the surface to rotate. The connecting rods 39 drive the arc-shaped scraper 310 to rotate clockwise close to the inner wall of the heat exchange tube 32, scraping off the particulate dust adsorbed on the inner wall of the heat exchange tube 32. The scraped dust slides down the surface of the arc-shaped scraper 310.
[0038] See Figure 2 A first guide plate 11 is fixedly connected to the outer surface of the first exhaust pipe 1 near the upper end. A second guide plate 21 is fixedly connected to the inner wall of the ash collection cylinder 2 at the same height as the first guide plate 11. A cleaning port is opened on the side wall of the ash collection cylinder 2, and a sealing plate 23 is hinged inside the cleaning port.
[0039] In addition, the scraped dust particles will slide down into the interior of the dust collection cylinder 2. The first guide plate 11 and the second guide plate 21 work together to guide the dust particles to the lower end of the dust collection cylinder 2. When there are a lot of dust particles inside, the sealing plate 23 is opened to clean the dust inside through the dust removal port.
[0040] The working principle of this utility model is as follows: After heat exchange through the heat exchange tube 32 for a period of time, the electric motor 37 is started. The electric motor 37 drives the arc-shaped scraper 310 to rotate closely against the inner wall of the heat exchange tube 32 through the transmission rod 38, scraping off the particulate dust adsorbed on the inner wall of the heat exchange tube 32. This allows the heat of the flue gas to be directly exchanged with the cold water through the heat exchange tube 32 and the heat exchange fins 33, improving the heat exchange effect. At the same time, the first guide plate 11 and the second guide plate 21 are used to facilitate the collection of scraped particulate dust and prevent the emitted flue gas from being stirred up, avoiding secondary adsorption and improving the dust removal effect.
[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A flue gas staged cooling and heat recovery system, comprising a first exhaust duct (1), characterized in that: The upper end of the first exhaust pipe (1) is fixedly connected to a first baffle plate (12). A heat exchange assembly is provided on the upper side of the first exhaust pipe (1). The heat exchange assembly includes a dust collection cylinder (2), a heat exchange cylinder (3), a baffle plate (31), a heat exchange tube (32), a heat exchange fin (33), a water inlet pipe (34), a drainage pipe (35), an electric motor (37), a transmission rod (38), a connecting rod (39), and an arc-shaped scraper (310). The lower end of the dust collection cylinder (2) is fixedly connected to a sealing sleeve (22). The sealing sleeve (22) is fixed on the surface of the first exhaust pipe (1). The heat exchange cylinder (3) is fixed on the upper end of the dust collection cylinder (2).
2. The flue gas staged cooling and heat recovery system according to claim 1, characterized in that: The partition (31) is fixed inside the heat exchange cylinder (3) near the upper side. Multiple sets of heat exchange tubes (32) are fixedly connected between the partition (31) and the bottom wall of the heat exchange cylinder (3). Multiple sets of heat exchange fins (33) are fixedly connected between the multiple sets of heat exchange tubes (32).
3. The flue gas staged cooling and heat recovery system according to claim 1, characterized in that: Multiple sets of electric motors (37) are fixedly installed on the upper end of the heat exchange cylinder (3). The outer side of the electric motor (37) is fitted with a device shell (36), and the device shell (36) is fixedly connected to the upper end of the heat exchange cylinder (3).
4. The flue gas staged cooling and heat recovery system according to claim 1, characterized in that: Each of the multiple heat exchange tubes (32) is equipped with a transmission rod (38), the upper end of which is fixedly connected to the output end of the electric motor (37).
5. The flue gas staged cooling and heat recovery system according to claim 4, characterized in that: Three sets of connecting rods (39) are fixedly connected to the surface of the transmission rod (38), and two sets of symmetrically distributed arc-shaped scrapers (310) are fixedly connected between the three sets of connecting rods (39).
6. The flue gas staged cooling and heat recovery system according to claim 1, characterized in that: The water inlet pipe (34) is fixedly connected to the left side of the heat exchange cylinder (3) at the position below the partition (31), and the drain pipe (35) is fixedly connected to the right side of the heat exchange cylinder (3) near the lower end.
7. The flue gas staged cooling and heat recovery system according to claim 1, characterized in that: A first guide plate (11) is fixedly connected to the outer surface of the first exhaust pipe (1) near the upper end. A second guide plate (21) is fixedly connected to the inner wall of the ash collection cylinder (2) at the same height as the first guide plate (11). A cleaning port is opened on the side wall of the ash collection cylinder (2), and a sealing plate (23) is hinged inside the cleaning port.
8. The flue gas staged cooling and heat recovery system according to claim 1, characterized in that: The upper end of the heat exchange cylinder (3) is fixedly connected to a second exhaust pipe (4), and the upper end of the second exhaust pipe (4) is fixedly connected to a second baffle plate (41).