A device for reducing the exhaust gas temperature of a boiler and improving energy utilization efficiency

Abstract

The application discloses a device for reducing boiler flue gas temperature and improving energy utilization efficiency, and belongs to the technical field of boiler auxiliary equipment. The device for reducing boiler flue gas temperature and improving energy utilization efficiency comprises a main energy exchange bin, a first auxiliary energy exchange bin, a second auxiliary energy exchange bin and an energy conversion group plate, one side of the main energy exchange bin is fixedly connected with the first auxiliary energy exchange bin, the other side of the main energy exchange bin is fixedly connected with the second auxiliary energy exchange bin, the bottom of the main energy exchange bin is a flue gas inlet, the top of the main energy exchange bin is fixedly connected with a flue gas discharge pipe, and the energy conversion group plate can slide horizontally in the main energy exchange bin, the first auxiliary energy exchange bin and the second auxiliary energy exchange bin. The device can simultaneously utilize flue gas energy to preheat combustion air and heat feed water, fully utilizes flue gas heat, reduces the temperature of flue gas when being discharged, and is convenient for flue gas treatment while saving energy and reducing emissions.

Description

Technical Field

[0001] This invention belongs to the technical field of boiler auxiliary equipment, specifically relating to a device for reducing boiler flue gas temperature and improving energy utilization efficiency. Background Technology

[0002] When a boiler is running, the flue gas produced by fuel combustion is very hot, typically between 150°C and 300°C. Directly releasing this gas would carry away a large amount of heat, resulting in energy waste. Recovering this heat can be used to preheat combustion air, heat feedwater, or meet other process requirements, thereby improving boiler efficiency, saving fuel, and reducing emissions.

[0003] When traditional boilers utilize flue gas energy, preheating combustion air and heating feedwater usually use different equipment, or only one type of energy recovery is performed. Using two types of equipment to recover and utilize flue gas energy results in heat loss due to the secondary transfer of flue gas, making the energy recovery of both types of equipment insufficient and wasting energy. Performing only one type of energy recovery results in even more insufficient flue gas energy recovery and a huge waste of energy.

[0004] Meanwhile, when using flue gas energy to heat feedwater, the flue gas contains a large amount of dust. This dust adheres to the water pipes, easily clogging the flue gas exhaust channels and affecting the heat absorption of the water pipes. Regular shutdowns are required to clean the outer walls of the water pipes, which is time-consuming, labor-intensive, and disrupts continuous boiler operation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a device for reducing boiler flue gas temperature and improving energy utilization efficiency. The present invention can simultaneously utilize flue gas energy to preheat combustion air and heat feedwater, make full use of flue gas heat, reduce the temperature of flue gas discharge, save energy and reduce emissions, facilitate flue gas treatment, and clean the outer wall of water pipes while utilizing flue gas energy, preventing the flue gas exhaust channel from being blocked, and improving the flue gas energy utilization rate.

[0006] The technical solution adopted to solve the above-mentioned technical problems is: a device for reducing boiler flue gas temperature and improving energy utilization efficiency, including a main energy exchange chamber, a first auxiliary energy exchange chamber, a second auxiliary energy exchange chamber, and a transducer plate. The first auxiliary energy exchange chamber is fixedly connected to one side of the main energy exchange chamber, and the second auxiliary energy exchange chamber is fixedly connected to the other side of the main energy exchange chamber. The bottom of the main energy exchange chamber is a flue gas inlet, and the top of the main energy exchange chamber is fixedly connected to a flue gas duct. The transducer plate can slide horizontally within the main energy exchange chamber, the first auxiliary energy exchange chamber, and the second auxiliary energy exchange chamber.

[0007] A hydraulic push rod is fixedly connected to one side of the first auxiliary energy exchange chamber. The hydraulic push rod is fixedly connected to one end of the energy exchange plate. The hydraulic push rod can drive the energy exchange plate to slide horizontally left and right.

[0008] An adjustment chamber is fixedly installed above the main energy exchange chamber. One side of the bottom of the adjustment chamber is connected to the first auxiliary energy exchange chamber, and the other side of the bottom of the adjustment chamber is connected to the second auxiliary energy exchange chamber.

[0009] The main energy exchange chamber is equipped with multiple sets of serpentine tubes, and water can flow through the serpentine tubes.

[0010] The main energy exchange chamber is equipped with a cleaning block. The horizontal left and right sliding of the energy exchange plate in the main energy exchange chamber can drive the cleaning block to slide horizontally back and forth in the main energy exchange chamber.

[0011] Through the above technical solution, flue gas enters the main energy exchange chamber through the bottom. The flue gas can heat the water in the serpentine tube, thereby reducing the flue gas temperature. The hydraulic push rod can drive the transducer plate to slide horizontally left and right, allowing the transducer plate to absorb the heat of the flue gas and further reduce the flue gas temperature. After absorbing the flue gas temperature, the transducer plate enters the first or second auxiliary energy exchange chamber. The regulating chamber can regulate the air entering the first or second auxiliary energy exchange chamber to preheat the air in the first or second auxiliary energy exchange chamber, ultimately achieving preheating of combustion air and heating of feedwater, making full use of the heat of the flue gas. At the same time, the horizontal left and right sliding of the transducer plate in the main energy exchange chamber can drive the cleaning block to slide horizontally back and forth in the main energy exchange chamber, thereby cleaning the outer wall of the serpentine tube, preventing the flue gas exhaust channel from being blocked, and improving the energy utilization rate of the flue gas.

[0012] Furthermore, a main water inlet pipe is fixedly connected to one end of the front side of the main energy exchange chamber, and a main water outlet pipe is fixedly connected to the other end of the front side of the main energy exchange chamber. The serpentine pipes are distributed in layers, with an inlet at one end of each serpentine pipe and an outlet at the other end. The inlet is connected to the main water inlet pipe, and the outlet is connected to the main water outlet pipe.

[0013] With the above technical solution, since one end of the serpentine tube is equipped with a water inlet and the other end with a water outlet, the water inlet is connected to the main water inlet pipe and the water outlet is connected to the main water outlet pipe, water can enter the serpentine tube from the main water inlet pipe. The water in the serpentine tube is heated and then enters the main water outlet pipe. This process is repeated to achieve continuous heating of the water in the serpentine tube and make full use of the heat of the flue gas.

[0014] Furthermore, multiple threaded rods are rotatably connected inside the main energy exchange chamber. The threaded rods are set within the horizontal gap of the serpentine tube. Multiple cleaning blocks are provided. The threaded rods pass through the cleaning blocks, and the cleaning blocks are threadedly connected to the threaded rods.

[0015] With the above technical solution, since the threaded rod is set in the horizontal gap of the serpentine tube, and multiple cleaning blocks are set, the threaded rod passes through the cleaning block, and the cleaning block is threadedly connected to the threaded rod, so that when the threaded rod rotates, it can drive the cleaning block to slide horizontally back and forth.

[0016] Furthermore, the cleaning block has arc-shaped grooves on both sides, which are slidably connected to the outer wall of the serpentine tube, and the cleaning block has multiple ash discharge seams.

[0017] With the above technical solution, since the arc-shaped groove is slidably connected to the outer wall of the serpentine tube, and multiple ash discharge seams are provided on the cleaning block, the cleaning block can slide horizontally back and forth to scrape the outer wall of the serpentine tube, thereby cleaning the outer wall of the serpentine tube. The setting of the ash discharge seams allows the dust and impurities generated by cleaning and scraping to be blown away by the flue gas from the ash discharge seams, preventing the accumulation of dust and impurities.

[0018] Furthermore, a driven gear is fixedly connected to one end of the threaded rod, and a first drive rack is fixedly connected to the transducer plate, the first drive rack meshing with the driven gear.

[0019] With the above technical solution, since a driven gear is fixedly connected to one end of the threaded rod and a first drive rack is fixedly connected to the transducer plate, the first drive rack meshes with the driven gear, causing the transducer plate to slide horizontally left and right, which in turn drives the first drive rack to slide horizontally left and right, thereby driving the driven gear to rotate. The rotation of the driven gear drives the threaded rod to rotate, which in turn drives the cleaning block to slide horizontally back and forth.

[0020] Furthermore, the main energy exchange chamber, the first auxiliary energy exchange chamber, and the second auxiliary energy exchange chamber are all provided with through slots on their side walls to allow the energy exchange plate to pass through. The energy exchange plate can pass through the gap between the two layers of the serpentine tube. The energy exchange plate includes a first baffle plate, a first heat storage plate, a second heat storage plate, and a second baffle plate. The first heat storage plate and the second heat storage plate are fixedly connected. The first baffle plate is fixedly connected to one side of the first heat storage plate, and the second baffle plate is symmetrically fixedly connected to one side of the second heat storage plate. Heat-absorbing corrugated plates are provided inside both the first heat storage plate and the second heat storage plate.

[0021] With the above technical solution, since the main energy exchange chamber, the first auxiliary energy exchange chamber and the second auxiliary energy exchange chamber are all provided with through slots that allow the energy exchange plate to pass through, the energy exchange plate can pass through the gap between the two layers of the serpentine tube, so that the energy exchange plate can slide horizontally left and right in the main energy exchange chamber, the first auxiliary energy exchange chamber and the second auxiliary energy exchange chamber. The first heat storage plate and the second heat storage plate are both provided with heat-absorbing corrugated plates, so that the first heat storage plate and the second heat storage plate can absorb the heat of the flue gas to preheat the air in the first auxiliary energy exchange chamber or the second auxiliary energy exchange chamber.

[0022] Furthermore, a first air duct is fixedly connected to the top of the first auxiliary energy exchange chamber, and a second air duct is fixedly connected to the top of the second auxiliary energy exchange chamber. The first air duct is connected to the first auxiliary energy exchange chamber, and the second air duct is connected to the second auxiliary energy exchange chamber. A receiving chamber is provided on one side of the second auxiliary energy exchange chamber, which can accommodate the second baffle plate. One end of the first baffle plate is fixedly connected to a hydraulic push rod.

[0023] With the above technical solution, since the first air duct and the first secondary energy exchange chamber are connected, and the second air duct and the second secondary energy exchange chamber are connected, a receiving chamber is provided on one side of the second secondary energy exchange chamber, which can accommodate the second baffle plate. One end of the first baffle plate is fixedly connected to the hydraulic push rod, so that when the energy exchange plate slides horizontally back and forth, the first baffle plate can be in the first secondary energy exchange chamber or on one side of the first secondary energy exchange chamber, the first heat storage plate can be in the main energy exchange chamber or the first secondary energy exchange chamber, the second baffle plate can be in the receiving chamber or the second secondary energy exchange chamber, and the second heat storage plate can be in the main energy exchange chamber or the second secondary energy exchange chamber. The first baffle plate in the first secondary energy exchange chamber can prevent the air from flowing back in the first secondary energy exchange chamber, and the second baffle plate in the second secondary energy exchange chamber can prevent the air from flowing back in the second secondary energy exchange chamber.

[0024] Furthermore, when the first heat storage plate is in the main energy exchange chamber, the second heat storage plate is in the second auxiliary energy exchange chamber, and when the second heat storage plate is in the main energy exchange chamber, the first heat storage plate is in the first auxiliary energy exchange chamber, thereby achieving uninterrupted alternating preheating of the air in the first and second auxiliary energy exchange chambers.

[0025] Furthermore, the regulating chamber includes a main air duct and a secondary air duct. The bottom of the main air duct is connected to a first air duct, and the bottom of the secondary air duct is connected to a second air duct. The main air duct and the secondary air duct are connected.

[0026] With the above technical solution, since the bottom of the main air duct is connected to the first air duct and the bottom of the secondary air duct is connected to the second air duct, the main air duct and the secondary air duct are connected, so that the air to be preheated enters from the top of the main air duct and can enter the first secondary energy exchange chamber or the second secondary energy exchange chamber.

[0027] Furthermore, an adjusting plate is rotatably connected at the connection between the main air duct and the secondary air duct. A limiting inclined plate is fixedly installed on the side of the main air duct near the rotating shaft of the adjusting plate. A sector gear is fixedly connected to the rotating shaft of the adjusting plate. A drive rod is fixedly connected to one end of the electric push rod. A second drive rack is provided on the drive rod, and the second drive rack meshes with the sector gear.

[0028] With the above technical solution, since an adjusting plate is rotatably connected at the connection between the main air duct and the auxiliary air duct, a limiting inclined plate is fixedly installed on the side of the main air duct near the rotating shaft of the adjusting plate, a sector gear is fixedly connected on the rotating shaft of the adjusting plate, a drive rod is fixedly connected to one end of the electric push rod, and a second drive rack is provided on the drive rod. The second drive rack meshes with the sector gear, so that when the adjusting plate is vertically erected, the air to be preheated in the main air duct enters the first auxiliary energy exchange chamber. When the adjusting plate rotates in the direction of the main air duct, the air to be preheated in the main air duct enters the second auxiliary energy exchange chamber from the auxiliary air duct, so that the air to be preheated is blown toward the second heat storage plate that has been heated in the main energy exchange chamber.

[0029] When the hydraulic push rod pushes the energy exchange plate to slide horizontally towards the second auxiliary energy exchange chamber, the second drive rack drives the sector gear to rotate in the forward direction, that is, the adjustment plate rotates towards the main air duct. The air to be preheated in the main air duct enters the second auxiliary energy exchange chamber from the auxiliary air duct. At this time, the first heat storage plate is in the main energy exchange chamber and the second heat storage plate is in the second auxiliary energy exchange chamber.

[0030] When the hydraulic push rod pushes the energy exchange plate to slide horizontally towards the first auxiliary energy exchange chamber, the second drive rack drives the sector gear to reverse, that is, the adjustment plate rotates towards the auxiliary air duct. When the adjustment plate is vertically erected, the air to be preheated in the main air duct enters the first auxiliary energy exchange chamber. At this time, the second heat storage plate is in the main energy exchange chamber and the first heat storage plate is in the first auxiliary energy exchange chamber, so that the air to be preheated is blown towards the first heat storage plate that has been heated in the main energy exchange chamber. Finally, the air to be preheated entering the adjustment chamber is continuously heated. The bottom of the first auxiliary energy exchange chamber and the bottom of the second auxiliary energy exchange chamber are both connected to the boiler combustion chamber.

[0031] The beneficial effects of this invention are as follows:

[0032] (1) In this invention, the hydraulic push rod can drive the transducer plate to slide horizontally left and right, so that the transducer plate absorbs the heat of the flue gas and further reduces the temperature of the flue gas. After the transducer plate absorbs the temperature of the flue gas, it enters the first or second auxiliary energy exchange chamber. The regulating chamber can regulate the air entering the first or second auxiliary energy exchange chamber to preheat the air in the first or second auxiliary energy exchange chamber. Finally, the preheating of combustion air and the heating of feed water are carried out at the same time, making full use of the heat of the flue gas and saving energy and reducing emissions.

[0033] (2) In this invention, the hydraulic push rod drives the transducer plate to slide horizontally left and right, and the first drive rack slides horizontally left and right accordingly, which in turn drives the driven gear to rotate. The driven gear rotates and drives the threaded rod to rotate, which in turn drives the cleaning block to slide horizontally back and forth. The horizontal back and forth sliding of the cleaning block can scrape the outer wall of the serpentine tube, thereby cleaning the outer wall of the serpentine tube. The setting of the ash discharge seam allows the dust and impurities generated by the cleaning and scraping to be blown away by the flue gas from the ash discharge seam, preventing the accumulation of dust and impurities, preventing the smoke exhaust channel from being blocked, and improving the energy utilization rate of the flue gas. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention;

[0035] Figure 2 This is a schematic diagram of the main energy exchange chamber of a device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention.

[0036] Figure 3 This is a schematic diagram of the structure of a device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention, showing the cooperation between a serpentine tube and a cleaning block;

[0037] Figure 4 This is a schematic diagram of the structure of the cleaning block and the threaded rod in a device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention.

[0038] Figure 5 This is a schematic diagram of the internal structure of a device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention.

[0039] Figure 6 This is a schematic diagram of the structure of the energy transducer plate of the device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention.

[0040] Figure 7 This is a schematic diagram of the structure of the first heat storage plate of the device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention.

[0041] Figure 8 This is a schematic diagram of the structure of the regulating chamber and the hydraulic push rod of the device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention;

[0042] Figure 9 This invention relates to a device for reducing boiler flue gas temperature and improving energy utilization efficiency. Figure 8 A magnified view of a section at point A in the middle;

[0043] Figure 10 This is a cross-sectional perspective view of the regulating chamber of a device for reducing boiler flue gas temperature and improving energy utilization efficiency according to the present invention.

[0044] Reference numerals: 1. Main energy exchange chamber; 2. First auxiliary energy exchange chamber; 3. Second auxiliary energy exchange chamber; 4. Energy exchange plate; 5. Adjustment chamber; 6. Hydraulic push rod; 11. Serpentine tube; 12. Threaded rod; 13. Cleaning block; 14. Main water inlet pipe; 15. Main water outlet pipe; 16. Through groove; 17. Smoke exhaust duct; 111. Water inlet; 112. Water outlet; 121. Driven gear; 131. Ash discharge seam; 21. First air duct; 31. Second air duct; 32. Receiving chamber; 41. First baffle plate; 42. First heat storage plate; 43. Second heat storage plate; 44. Second baffle plate; 45. Heat-absorbing corrugated plate; 421. First drive rack; 51. Main air duct; 52. Auxiliary air duct; 53. Adjustment plate; 54. Limiting inclined plate; 531. Sector gear; 61. Drive rod; 62. Second drive rack. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] like Figure 1 and Figure 5 As shown, a device for reducing boiler flue gas temperature and improving energy utilization efficiency includes a main energy exchange chamber 1, a first auxiliary energy exchange chamber 2, a second auxiliary energy exchange chamber 3, and an energy exchange plate 4. The first auxiliary energy exchange chamber 2 is fixedly connected to one side of the main energy exchange chamber 1, and the second auxiliary energy exchange chamber 3 is fixedly connected to the other side of the main energy exchange chamber 1. The bottom of the main energy exchange chamber 1 is a flue gas inlet, and the top of the main energy exchange chamber 1 is fixedly connected to a flue gas duct 17. The energy exchange plate 4 can slide horizontally within the main energy exchange chamber 1, the first auxiliary energy exchange chamber 2, and the second auxiliary energy exchange chamber 3.

[0047] A hydraulic push rod 6 is fixedly connected to one side of the first energy exchange chamber 2. The hydraulic push rod 6 is fixedly connected to one end of the energy exchange plate 4. The hydraulic push rod 6 can drive the energy exchange plate 4 to slide horizontally left and right.

[0048] An adjustment chamber 5 is fixedly installed above the main energy exchange chamber 1. One side of the bottom of the adjustment chamber 5 is connected to the first auxiliary energy exchange chamber 2, and the other side of the bottom of the adjustment chamber 5 is connected to the second auxiliary energy exchange chamber 3.

[0049] Multiple sets of serpentine tubes 11 are fixedly installed inside the main energy exchange chamber 1, and water can flow through the serpentine tubes 11;

[0050] A cleaning block 13 is installed inside the main energy exchange chamber 1. The horizontal left and right sliding of the energy exchange plate 4 inside the main energy exchange chamber 1 can drive the cleaning block 13 to slide horizontally back and forth inside the main energy exchange chamber 1.

[0051] In this embodiment, flue gas enters the main energy exchange chamber 1 through the bottom. The flue gas can heat the water in the serpentine tube 11, thereby reducing the flue gas temperature. The hydraulic push rod 6 can drive the transducer plate 4 to slide horizontally left and right, so that the transducer plate 4 absorbs the heat of the flue gas and further reduces the flue gas temperature. After absorbing the flue gas temperature, the transducer plate 4 enters the first auxiliary energy exchange chamber 2 or the second auxiliary energy exchange chamber 3. The regulating chamber 5 can regulate the air entering the first auxiliary energy exchange chamber 2 or the second auxiliary energy exchange chamber 3 to preheat the air in the first auxiliary energy exchange chamber 2 or the second auxiliary energy exchange chamber 3. Finally, the preheating of combustion air and the heating of water supply are carried out simultaneously, making full use of the heat of flue gas. At the same time, the horizontal left and right sliding of the transducer plate 4 in the main energy exchange chamber 1 can drive the cleaning block 13 to slide horizontally back and forth in the main energy exchange chamber 1, thereby cleaning the outer wall of the serpentine tube 11, preventing the flue gas exhaust channel from being blocked, and improving the energy utilization rate of flue gas.

[0052] like Figure 2 - Figure 7 As shown, a main water inlet pipe 14 is fixedly connected to one end of the front side of the main energy exchange chamber 1, and a main water outlet pipe 15 is fixedly connected to the other end of the front side of the main energy exchange chamber 1. The serpentine pipes 11 are distributed in layers. One end of the serpentine pipe 11 is provided with a water inlet 111, and the other end of the serpentine pipe 11 is provided with a water outlet 112. The water inlet 111 is connected to the main water inlet pipe 14, and the water outlet 112 is connected to the main water outlet pipe 15.

[0053] Multiple threaded rods 12 are rotatably connected inside the main energy exchange chamber 1. The threaded rods 12 are set in the horizontal gap of the serpentine tube 11. Multiple cleaning blocks 13 are provided. The threaded rods 12 pass through the cleaning blocks 13 and the cleaning blocks 13 are threadedly connected to the threaded rods 12.

[0054] The cleaning block 13 has arc-shaped grooves on both sides, which are slidably connected to the outer wall of the serpentine tube 11. The cleaning block 13 has multiple ash discharge seams 131.

[0055] One end of the threaded rod 12 is fixedly connected to a driven gear 121, and a first drive rack 421 is fixedly connected to the transducer plate 4. The first drive rack 421 meshes with the driven gear 121.

[0056] In this embodiment, the hydraulic push rod 6 drives the transducer plate 4 to slide horizontally left and right, and the first drive rack 421 slides horizontally left and right accordingly, which in turn drives the driven gear 121 to rotate. The rotation of the driven gear 121 drives the threaded rod 12 to rotate, which in turn drives the cleaning block 13 to slide horizontally back and forth. The horizontal back and forth sliding of the cleaning block 13 can scrape the outer wall of the serpentine tube 11, thereby cleaning the outer wall of the serpentine tube 11. The setting of the ash discharge seam 131 allows the dust and impurities generated by cleaning and scraping to be blown away by the flue gas from the ash discharge seam 131, preventing the accumulation of dust and impurities.

[0057] like Figure 1 and Figure 5 - Figure 10 As shown, the main energy exchange chamber 1, the first auxiliary energy exchange chamber 2, and the second auxiliary energy exchange chamber 3 are all provided with through slots 16 that allow the energy exchange plate 4 to pass through. The energy exchange plate 4 can pass through the gap between the two layers of the serpentine tube 11. The energy exchange plate 4 includes a first baffle plate 41, a first heat storage plate 42, a second heat storage plate 43, and a second baffle plate 44. The first heat storage plate 42 and the second heat storage plate 43 are fixedly connected. The first baffle plate 41 is fixedly connected to one side of the first heat storage plate 42, and the second baffle plate 44 is symmetrically fixedly connected to one side of the second heat storage plate 43. Heat-absorbing wave plates 45 are provided inside the first heat storage plate 42 and the second heat storage plate 43.

[0058] The top of the first auxiliary energy exchange chamber 2 is fixedly connected to the first air duct 21, and the top of the second auxiliary energy exchange chamber 3 is fixedly connected to the second air duct 31. The first air duct 21 is connected to the first auxiliary energy exchange chamber 2, and the second air duct 31 is connected to the second auxiliary energy exchange chamber 3. A receiving chamber 32 is provided on one side of the second auxiliary energy exchange chamber 3. The receiving chamber 32 can hold the second baffle plate 44. One end of the first baffle plate 41 is fixedly connected to the hydraulic push rod 6.

[0059] The regulating chamber 5 includes a main air duct 51 and a secondary air duct 52. The bottom of the main air duct 51 is connected to the first air duct 21, and the bottom of the secondary air duct 52 is connected to the second air duct 31. The main air duct 51 and the secondary air duct 52 are connected.

[0060] An adjusting plate 53 is rotatably connected at the connection between the main air duct 51 and the auxiliary air duct 52. A limiting inclined plate 54 is fixedly installed on the side of the main air duct 51 near the rotating shaft of the adjusting plate 53. A sector gear 531 is fixedly connected to the rotating shaft of the adjusting plate 53. A drive rod 61 is fixedly connected to one end of the hydraulic push rod 6. A second drive rack 62 is provided on the drive rod 61, and the second drive rack 62 meshes with the sector gear 531.

[0061] In this embodiment, when the hydraulic push rod 6 pushes the energy exchange plate 4 to slide horizontally towards the second auxiliary energy exchange chamber 3, the second drive rack 62 drives the sector gear 531 to rotate forward, that is, the adjusting plate 53 rotates towards the main air duct 51. The air to be preheated in the main air duct 51 enters the second auxiliary energy exchange chamber 3 from the auxiliary air duct 52. At this time, the first heat storage plate 42 is in the main energy exchange chamber 1, and the second heat storage plate 43 is in the second auxiliary energy exchange chamber 3, so that the air to be preheated is blown towards the second heat storage plate 43, which has already been heated in the main energy exchange chamber 1.

[0062] When the hydraulic push rod 6 pushes the energy transducer plate 4 to slide horizontally towards the first auxiliary energy exchange chamber 2, the second drive rack 62 drives the sector gear 531 to reverse, that is, the adjusting plate 53 rotates towards the auxiliary air duct 52. When the adjusting plate 53 is vertically erected, the air to be preheated in the main air duct 51 enters the first auxiliary energy exchange chamber 2. At this time, the second heat storage plate 43 is in the main energy exchange chamber 1 and the first heat storage plate 42 is in the first auxiliary energy exchange chamber 2, so that the air to be preheated is blown toward the first heat storage plate 42 that has been heated in the main energy exchange chamber 1, and finally the air to be preheated entering the adjusting chamber 5 is continuously heated.

[0063] The first baffle plate 41 can be located inside the first secondary energy exchange chamber 2 or on one side of the first secondary energy exchange chamber 2. The second baffle plate 44 can be located inside the receiving chamber 32 or the second secondary energy exchange chamber 3. The first baffle plate 41 can block the air backflow inside the first secondary energy exchange chamber 2, and the second baffle plate 44 can block the air backflow inside the second secondary energy exchange chamber 3.

[0064] Working principle:

[0065] During operation, flue gas enters the main energy exchange chamber 1 through the bottom of the main energy exchange chamber 1. The flue gas can heat the water in the serpentine tube 11, thereby reducing the flue gas temperature. The hydraulic push rod 6 can drive the energy exchange plate 4 to slide horizontally back and forth.

[0066] When the first heat storage plate 42 is in the main energy exchange chamber 1, the second heat storage plate 43 is in the second auxiliary energy exchange chamber 3. When the second heat storage plate 43 is in the main energy exchange chamber 1, the first heat storage plate 42 is in the first auxiliary energy exchange chamber 2. That is, when the first heat storage plate 42 absorbs heat from the flue gas in the main energy exchange chamber 1, the second heat storage plate 43 preheats the air in the second auxiliary energy exchange chamber 3. When the second heat storage plate 43 absorbs heat from the flue gas in the main energy exchange chamber 1, the first heat storage plate 42 preheats the air in the first auxiliary energy exchange chamber 2.

[0067] When the hydraulic push rod 6 pushes the energy exchange plate 4 to slide horizontally towards the second auxiliary energy exchange chamber 3, the second drive rack 62 drives the sector gear 531 to rotate forward, that is, the adjusting plate 53 rotates towards the main air duct 51. The air to be preheated in the main air duct 51 enters the second auxiliary energy exchange chamber 3 through the auxiliary air duct 52. At this time, the first heat storage plate 42 is in the main energy exchange chamber 1 and the second heat storage plate 43 is in the second auxiliary energy exchange chamber 3, so that the air to be preheated is blown towards the second heat storage plate 43, which has already been heated in the main energy exchange chamber 1.

[0068] When the hydraulic push rod 6 pushes the energy transducer plate 4 to slide horizontally towards the first auxiliary energy exchange chamber 2, the second drive rack 62 drives the sector gear 531 to reverse, that is, the adjusting plate 53 rotates towards the auxiliary air duct 52. When the adjusting plate 53 is vertically erected, the air to be preheated in the main air duct 51 enters the first auxiliary energy exchange chamber 2. At this time, the second heat storage plate 43 is in the main energy exchange chamber 1 and the first heat storage plate 42 is in the first auxiliary energy exchange chamber 2, so that the air to be preheated is blown toward the first heat storage plate 42 that has been heated in the main energy exchange chamber 1, and finally the air to be preheated entering the adjusting chamber 5 is continuously heated.

[0069] The air preheated in the first and second energy exchange chambers 2 and 3 is vented into the boiler combustion chamber, effectively saving energy.

[0070] During this process, the hydraulic push rod 6 drives the transducer plate 4 to slide horizontally left and right, and the first drive rack 421 slides horizontally left and right accordingly, which in turn drives the driven gear 121 to rotate. The rotation of the driven gear 121 drives the threaded rod 12 to rotate, which in turn drives the cleaning block 13 to slide horizontally back and forth. The horizontal back and forth sliding of the cleaning block 13 can scrape the outer wall of the serpentine tube 11, thus cleaning the outer wall of the serpentine tube 11. The setting of the ash discharge seam 131 allows the dust and impurities generated by cleaning and scraping to be blown away by the flue gas through the ash discharge seam 131, preventing the accumulation of dust and impurities, preventing blockage of the smoke exhaust channel, ensuring that the serpentine tube 11 absorbs heat, and reducing the frequency of maintenance.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A device for reducing boiler flue gas temperature and improving energy utilization efficiency, comprising a main energy exchange chamber (1), a first auxiliary energy exchange chamber (2), a second auxiliary energy exchange chamber (3), and an energy exchange assembly plate (4), characterized in that, The main energy exchange chamber (1) is fixedly connected to a first auxiliary energy exchange chamber (2) on one side, and a second auxiliary energy exchange chamber (3) is fixedly connected to the other side of the main energy exchange chamber (1). The bottom of the main energy exchange chamber (1) is a flue gas inlet, and the top of the main energy exchange chamber (1) is fixedly connected to a flue gas duct (17). The energy exchange plate (4) can slide horizontally within the main energy exchange chamber (1), the first auxiliary energy exchange chamber (2), and the second auxiliary energy exchange chamber (3). A hydraulic push rod (6) is fixedly connected to one side of the first auxiliary energy exchange chamber (2). The hydraulic push rod (6) is fixedly connected to one end of the energy exchange plate (4). The hydraulic push rod (6) can drive the energy exchange plate (4) to slide horizontally left and right. An adjustment chamber (5) is fixedly installed above the main energy exchange chamber (1). One side of the bottom of the adjustment chamber (5) is connected to the first auxiliary energy exchange chamber (2), and the other side of the bottom of the adjustment chamber (5) is connected to the second auxiliary energy exchange chamber (3). The main energy exchange chamber (1) is fixedly equipped with multiple sets of serpentine tubes (11), and water can flow through the serpentine tubes (11); The main energy exchange chamber (1) is equipped with a cleaning block (13). The energy exchange plate (4) can drive the cleaning block (13) to slide horizontally back and forth within the main energy exchange chamber (1) by sliding horizontally left and right within the main energy exchange chamber (1). The main energy exchange chamber (1) is rotatably connected with multiple threaded rods (12). The threaded rods (12) are set in the horizontal gap of the serpentine tube (11). Multiple cleaning blocks (13) are provided. The threaded rods (12) pass through the cleaning blocks (13). The cleaning blocks (13) are threadedly connected to the threaded rods (12). One end of the threaded rod (12) is fixedly connected to a driven gear (121), and a first drive rack (421) is fixedly connected to the transducer plate (4), and the first drive rack (421) meshes with the driven gear (121).

2. The device for reducing boiler flue gas temperature and improving energy utilization efficiency according to claim 1, characterized in that, The main energy exchange chamber (1) is fixedly connected to a main water inlet pipe (14) at one end of its front side, and to a main water outlet pipe (15) at the other end of its front side. The serpentine pipe (11) is distributed in layers. One end of the serpentine pipe (11) is provided with a water inlet (111), and the other end of the serpentine pipe (11) is provided with a water outlet (112). The water inlet (111) is connected to the main water inlet pipe (14), and the water outlet (112) is connected to the main water outlet pipe (15).

3. The device for reducing boiler flue gas temperature and improving energy utilization efficiency according to claim 2, characterized in that, The cleaning block (13) has arc-shaped grooves on both sides, and the arc-shaped grooves are slidably connected to the outer wall of the serpentine tube (11). The cleaning block (13) has multiple ash discharge seams (131).

4. The device for reducing boiler flue gas temperature and improving energy utilization efficiency according to claim 1, characterized in that, The main energy exchange chamber (1), the first auxiliary energy exchange chamber (2), and the second auxiliary energy exchange chamber (3) are all provided with through slots (16) that allow the energy exchange plate (4) to pass through. The energy exchange plate (4) can pass through the gap between the two layers of the serpentine tube (11). The energy exchange plate (4) includes a first baffle plate (41), a first heat storage plate (42), a second heat storage plate (43), and a second baffle plate (44). The first heat storage plate (42) and the second heat storage plate (43) are fixedly connected. The first baffle plate (41) is fixedly connected to one side of the first heat storage plate (42), and the second baffle plate (44) is symmetrically fixedly connected to one side of the second heat storage plate (43).

5. The device for reducing boiler flue gas temperature and improving energy utilization efficiency according to claim 4, characterized in that, Both the first heat storage plate (42) and the second heat storage plate (43) are provided with heat-absorbing corrugated plates (45).

6. The device for reducing boiler flue gas temperature and improving energy utilization efficiency according to claim 5, characterized in that, The top of the first auxiliary energy exchange chamber (2) is fixedly connected to a first air duct (21), and the top of the second auxiliary energy exchange chamber (3) is fixedly connected to a second air duct (31). The first air duct (21) and the first auxiliary energy exchange chamber (2) are connected, and the second air duct (31) and the second auxiliary energy exchange chamber (3) are connected. A receiving chamber (32) is provided on one side of the second auxiliary energy exchange chamber (3). The receiving chamber (32) can hold the second baffle plate (44). One end of the first baffle plate (41) is fixedly connected to the hydraulic push rod (6).

7. The device for reducing boiler flue gas temperature and improving energy utilization efficiency according to claim 6, characterized in that, The regulating chamber (5) includes a main air duct (51) and a secondary air duct (52). The bottom of the main air duct (51) is connected to the first air duct (21), and the bottom of the secondary air duct (52) is connected to the second air duct (31). The main air duct (51) and the secondary air duct (52) are connected.

8. The device for reducing boiler flue gas temperature and improving energy utilization efficiency according to claim 7, characterized in that, An adjusting plate (53) is rotatably connected at the connection between the main air duct (51) and the secondary air duct (52). A limiting inclined plate (54) is fixedly installed on the side of the main air duct (51) near the rotating shaft of the adjusting plate (53). A sector gear (531) is fixedly connected on the rotating shaft of the adjusting plate (53). A drive rod (61) is fixedly connected to one end of the hydraulic push rod (6). A second drive rack (62) is provided on the drive rod (61). The second drive rack (62) meshes with the sector gear (531).

Images