Device for reducing exhaust gas temperature of boiler and improving energy utilization efficiency

Abstract

The invention discloses a device for reducing the exhaust gas temperature of a boiler and improving the energy utilization efficiency, and belongs to the technical field of boiler auxiliary equipment.The device for reducing the exhaust gas temperature of the boiler and improving the energy utilization efficiency comprises a main energy exchange bin, a first auxiliary energy exchange bin, a second auxiliary energy exchange bin and an energy exchange set plate; one side of the main energy exchange bin is fixedly connected with a first auxiliary energy exchange bin, the other side of the main energy exchange bin is fixedly connected with a second auxiliary energy exchange bin, the bottom of the main energy exchange bin is a flue gas inlet, and the top of the main energy exchange bin is fixedly connected with a discharge flue; and the transduction group plates can horizontally slide in the main energy exchange bin, the first auxiliary energy exchange bin and the second auxiliary energy exchange bin. Smoke energy can be used for preheating combustion air and heating feed water at the same time, smoke heat is fully used, the temperature when smoke is exhausted is reduced, energy is saved, emission is reduced, and meanwhile smoke treatment is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of boiler auxiliary equipment, and particularly relates to a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency. Background Art

[0002] When the boiler is operating, the flue gas temperature generated by fuel combustion is very high, usually between 150°C and 300°C. If directly discharged, it will carry away a large amount of heat, causing energy waste. Recycling this part of the heat can be used to preheat combustion air, heat feed water, or other process requirements, thereby improving boiler efficiency, saving fuel, and reducing emissions.

[0003] When traditional boilers utilize flue gas energy, different devices are usually used for preheating combustion air and heating feed water, or only one type of energy recovery is carried out. When using two devices for the recovery and utilization of flue gas energy, the flue gas undergoes secondary transfer, resulting in heat loss, making the energy recovery of the two devices insufficient and wasting energy. While conducting only one type of energy recovery alone, the flue gas energy recovery is even more insufficient, greatly wasting energy.

[0004] Meanwhile, when using flue gas energy to heat feed water, the flue gas contains a large amount of dust. The dust adheres to the water pipes, not only easily blocking the flue gas discharge channel but also affecting the heat absorption of the water pipes. It is necessary to regularly stop the machine to clean the outer wall of the water pipes, which is time-consuming and laborious and affects the continuous operation of the boiler. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency. The present invention can simultaneously utilize flue gas energy to preheat combustion air and heat feed water, fully utilize the heat of the flue gas, reduce the temperature when the flue gas is discharged, facilitate flue gas treatment while saving energy and reducing emissions, and can clean the outer wall of the water pipes while utilizing flue gas energy, preventing the blockage of the flue gas discharge channel and improving the utilization efficiency of flue gas energy.

[0006] The technical solution adopted to solve the above technical problem is: a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency, including a main energy exchange chamber, a first secondary energy exchange chamber, a second secondary energy exchange chamber, and an energy conversion group board. One side of the main energy exchange chamber is fixedly connected to the first secondary energy exchange chamber, and the other side of the main energy exchange chamber is fixedly connected to the second secondary energy exchange chamber. The bottom of the main energy exchange chamber is the flue gas inlet, and the top of the main energy exchange chamber is fixedly connected to a flue gas discharge duct. The energy conversion group board can horizontally slide within the main energy exchange chamber, the first secondary energy exchange chamber, and the second secondary energy exchange chamber; One side of the first secondary energy exchange chamber is fixedly connected to a hydraulic push rod, and the hydraulic push rod is fixedly connected to one end of the energy conversion group board. The hydraulic push rod can drive the energy conversion group board to horizontally slide left and right; Above the main energy exchange chamber, an adjustment chamber is fixedly arranged. One side of the bottom of the adjustment chamber is communicated with the first auxiliary energy exchange chamber, and the other side of the bottom of the adjustment chamber is communicated with the second auxiliary energy exchange chamber; Inside the main energy exchange chamber, multiple groups of serpentine tubes are fixedly arranged, and water can flow through the serpentine tubes; Inside the main energy exchange chamber, a cleaning block is arranged. When the energy conversion group plate slides horizontally left and right in the main energy exchange chamber, it can drive the cleaning block to slide horizontally back and forth in the main energy exchange chamber.

[0007] Through the above technical solution, the flue gas enters the main energy exchange chamber from the bottom of the main energy exchange chamber. The flue gas can heat the water in the serpentine tubes, thereby reducing the temperature of the flue gas. The hydraulic push rod can drive the energy conversion group plate to slide horizontally left and right, so that the energy conversion group plate absorbs the heat of the flue gas and further reduces the temperature of the flue gas. After the energy conversion group plate absorbs the temperature of the flue gas, it enters the first auxiliary energy exchange chamber or the second auxiliary energy exchange chamber. The adjustment chamber can adjust the air entering the first auxiliary energy exchange chamber or the second auxiliary energy exchange chamber to realize preheating the air in the first auxiliary energy exchange chamber or the second auxiliary energy exchange chamber, and finally realize preheating the combustion air and heating the feed water, making full use of the heat of the flue gas. At the same time, when the energy conversion group plate slides horizontally left and right in the main energy exchange chamber, it can drive the cleaning block to slide horizontally back and forth in the main energy exchange chamber, so as to realize the cleaning of the outer wall of the serpentine tube, prevent the blockage of the smoke exhaust passage, and improve the energy utilization rate of the flue gas.

[0008] Further, one end of the front side of the main energy exchange chamber is fixedly connected with a total water inlet pipe, and the other end of the front side of the main energy exchange chamber is fixedly connected with a total water outlet pipe. The serpentine tubes are distributed in layers. One end of the serpentine tube is provided with a water inlet, and the other end of the serpentine tube is provided with a water outlet. The water inlet is communicated with the total water inlet pipe, and the water outlet is communicated with the total water outlet pipe.

[0009] Through the above technical solution, since one end of the serpentine tube is provided with a water inlet, the other end of the serpentine tube is provided with a water outlet, the water inlet is communicated with the total water inlet pipe, and the water outlet is communicated with the total water outlet pipe, the water can enter the serpentine tube from the total water inlet pipe, and the water in the serpentine tube enters the total water outlet pipe after being heated. In this way, the continuous heating of the water in the serpentine tube is realized, and the heat of the flue gas is fully utilized.

[0010] Further, a plurality of threaded rods are rotatably connected inside the main energy exchange chamber. The threaded rods are arranged in the horizontal gaps of the serpentine tubes. A plurality of cleaning blocks are arranged. The threaded rods penetrate through the cleaning blocks, and the cleaning blocks are threadedly connected with the threaded rods.

[0011] Through the above technical solution, since the threaded rods are arranged in the horizontal gaps of the serpentine tubes, a plurality of cleaning blocks are arranged, the threaded rods penetrate through the cleaning blocks, and the cleaning blocks are threadedly connected with the threaded rods, when the threaded rods rotate, the cleaning blocks can be driven to slide horizontally back and forth.

[0012] Further, arc-shaped grooves are provided on both sides of the cleaning block, and the arc-shaped grooves are slidably connected to the outer wall of the serpentine tube. A plurality of ash discharge slits are provided on the cleaning block.

[0013] Through the above technical solution, since the arc-shaped grooves are slidably connected to the outer wall of the serpentine tube and a plurality of ash discharge slits are provided on the cleaning block, the cleaning block can slide horizontally back and forth to scrape the outer wall of the serpentine tube, realizing the cleaning of the outer wall of the serpentine tube. The arrangement of the ash discharge slits enables the dust and impurities generated by the cleaning and scraping to be blown away by the flue gas from the ash discharge slits, preventing the accumulation of dust and impurities.

[0014] Further, one end of the threaded rod is fixedly connected with a driven gear, and a first driving rack is fixedly connected to the transducer group plate. The first driving rack meshes with the driven gear.

[0015] Through the above technical solution, since one end of the threaded rod is fixedly connected with a driven gear, a first driving rack is fixedly connected to the transducer group plate, and the first driving rack meshes with the driven gear, the horizontal left-right sliding of the transducer group plate drives the horizontal left-right sliding of the first driving rack, which in turn drives 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.

[0016] Further, through grooves allowing the transducer group plate to pass through are provided on the side walls of the main energy exchange chamber, the first auxiliary energy exchange chamber, and the second auxiliary energy exchange chamber. The transducer group plate can pass through the gap between the two layers of the serpentine tube. The transducer group plate includes a first blocking plate, a first heat storage plate, a second heat storage plate, and a second blocking plate. The first heat storage plate and the second heat storage plate are fixedly connected. The first blocking plate is fixedly connected to one side of the first heat storage plate. The second blocking plate is symmetrically fixedly connected to one side of the second heat storage plate. Heat absorption corrugated plates are provided in both the first heat storage plate and the second heat storage plate.

[0017] Through the above technical solution, since through grooves allowing the transducer group plate to pass through are provided on the side walls of the main energy exchange chamber, the first auxiliary energy exchange chamber, and the second auxiliary energy exchange chamber, and the transducer group plate can pass through the gap between the two layers of the serpentine tube, the transducer group 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. Heat absorption corrugated plates are provided in both the first heat storage plate and the second heat storage plate, enabling the first heat storage plate and the second heat storage plate to 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.

[0018] Further, 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 communicates with the first auxiliary energy exchange chamber, and the second air duct communicates with the second auxiliary energy exchange chamber. A receiving chamber is provided on one side of the second auxiliary energy exchange chamber. The receiving chamber can accommodate the second baffle, and one end of the first baffle is fixedly connected to the hydraulic push rod.

[0019] Through the above technical solution, since the first air duct communicates with the first auxiliary energy exchange chamber, the second air duct communicates with the second auxiliary energy exchange chamber, a receiving chamber is provided on one side of the second auxiliary energy exchange chamber, the receiving chamber can accommodate the second baffle, and one end of the first baffle is fixedly connected to the hydraulic push rod. When the energy conversion group plate reciprocates horizontally left and right, the first baffle can be inside the first auxiliary energy exchange chamber or on one side of the first auxiliary energy exchange chamber, the first heat storage plate can be inside the main energy exchange chamber or the first auxiliary energy exchange chamber, the second baffle can be inside the receiving chamber or the second auxiliary energy exchange chamber, and the second heat storage plate can be inside the main energy exchange chamber or the second auxiliary energy exchange chamber. The first baffle can block the air reflux in the first auxiliary energy exchange chamber inside the first auxiliary energy exchange chamber, and the second baffle can block the air reflux in the second auxiliary energy exchange chamber inside the second auxiliary energy exchange chamber; Moreover, when the first heat storage plate is inside the main energy exchange chamber, the second heat storage plate is inside the second auxiliary energy exchange chamber, and when the second heat storage plate is inside the main energy exchange chamber, the first heat storage plate is inside the first auxiliary energy exchange chamber, so as to continuously preheat the air in the first auxiliary energy exchange chamber and the second auxiliary energy exchange chamber alternately.

[0020] Further, the adjustment chamber includes a main air duct and an auxiliary air duct. The bottom of the main air duct communicates with the first air duct, the bottom of the auxiliary air duct communicates with the second air duct, and the main air duct and the auxiliary air duct communicate with each other.

[0021] Through the above technical solution, since the bottom of the main air duct communicates with the first air duct, the bottom of the auxiliary air duct communicates with the second air duct, and the main air duct and the auxiliary air duct communicate with each other, the air to be preheated enters from the top of the main air duct and can enter the first auxiliary energy exchange chamber or the second auxiliary energy exchange chamber.

[0022] Further, an adjustment plate is rotatably connected at the connection between the main air duct and the auxiliary air duct. A limiting inclined plate is fixedly arranged on one side of the main air duct close to the rotation shaft of the adjustment plate. A sector gear is fixedly connected to the rotation shaft of the adjustment plate. One end of the electric push rod is fixedly connected to a driving rod, and a second driving rack is arranged on the driving rod. The second driving rack meshes with the sector gear.

[0023] Through the above technical solution, since the adjusting plate is rotatably connected at the joint of the main air duct and the auxiliary air duct, a limiting inclined plate is fixedly arranged on one side of the main air duct close to the rotating shaft of the adjusting plate, a sector gear is fixedly connected to the rotating shaft of the adjusting plate, one end of the electric push rod is fixedly connected to a driving rod, a second driving rack is arranged on the driving rod, and the second driving rack meshes with the sector gear. When the adjusting plate is vertically erected, the air to be preheated entering the main air duct enters the first auxiliary energy exchange chamber. When the adjusting plate rotates towards the main air duct, the air to be preheated entering the main air duct enters the second auxiliary energy exchange chamber through the auxiliary air duct, so that the air to be preheated blows towards the second heat storage plate that has been heated in the main energy exchange chamber; When the hydraulic push rod pushes the energy conversion group plate to slide horizontally towards the second auxiliary energy exchange chamber, the second driving rack drives the sector gear to rotate forward, that is, the adjusting plate rotates towards the main air duct, and the air to be preheated entering the main air duct enters the second auxiliary energy exchange chamber through 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; When the hydraulic push rod pushes the energy conversion group plate to slide horizontally towards the first auxiliary energy exchange chamber, the second driving rack drives the sector gear to rotate in reverse, that is, the adjusting plate rotates towards the auxiliary air duct. When the adjusting plate is vertically erected, the air to be preheated entering 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 blows towards the first heat storage plate that has been heated in the main energy exchange chamber, and finally realizes the sustainable heating of the air to be preheated entering the adjustment chamber. The bottoms of both the first auxiliary energy exchange chamber and the second auxiliary energy exchange chamber are communicated with the boiler combustion chamber.

[0024] The beneficial effects of the present invention are as follows: (1) In the present invention, the hydraulic push rod can drive the energy conversion group plate to slide horizontally left and right, so that the energy conversion group plate absorbs the heat of the flue gas, further reducing the temperature of the flue gas. After the energy conversion group plate absorbs the flue gas temperature, it enters the first auxiliary energy exchange chamber or the second auxiliary energy exchange chamber. The adjustment chamber can adjust the air to enter the first auxiliary energy exchange chamber or the second auxiliary energy exchange chamber, realizing the preheating of the air in the first auxiliary energy exchange chamber or the second auxiliary energy exchange chamber, and finally realizing the simultaneous preheating of the combustion air and the heating of the feed water, making full use of the flue gas heat, and saving energy and reducing emissions; (2) In the present invention, the hydraulic push rod drives the energy conversion group plate to slide horizontally left and right, and the first driving rack slides horizontally left and right accordingly, then drives the driven gear to rotate, the driven gear rotates to drive the threaded rod to rotate, and then drives the cleaning block to slide horizontally back and forth. The cleaning block sliding horizontally back and forth can scrape the outer wall of the serpentine tube, realizing the cleaning of the outer wall of the serpentine tube. The setting of the ash discharge seam enables 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 blockage of the smoke exhaust channel, and improving the energy utilization rate of the flue gas. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention; Figure 2 is a schematic structural diagram of the main energy exchange chamber of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention; Figure 3 is a schematic structural diagram of the cooperation between the serpentine pipe and the cleaning block of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention; Figure 4 is a schematic structural diagram of the cooperation between the cleaning block and the threaded rod of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention; Figure 5 is a schematic internal structural diagram of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention; Figure 6 is a schematic structural diagram of the energy conversion group plate of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention; Figure 7 is a schematic structural diagram of the first heat storage plate of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention; Figure 8 is a schematic structural diagram of the cooperation between the adjustment chamber and the hydraulic push rod of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention; Figure 9 is a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention Figure 8 partial enlarged view at A in; Figure 10 is a sectional perspective view of the adjustment chamber of a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to the present invention.

[0026] Reference numerals: 1, main energy exchange chamber; 2, first auxiliary energy exchange chamber; 3, second auxiliary energy exchange chamber; 4, energy conversion group plate; 5, adjustment chamber; 6, hydraulic push rod; 11, serpentine pipe; 12, threaded rod; 13, cleaning block; 14, total water inlet pipe; 15, total water outlet pipe; 16, through groove; 17, flue gas duct; 111, water inlet; 112, water outlet; 121, driven gear; 131, ash discharge slit; 21, first air duct; 31, second air duct; 32, accommodation chamber; 41, first baffle; 42, first heat storage plate; 43, second heat storage plate; 44, second baffle; 45, heat absorption corrugated plate; 421, first driving rack; 51, main air duct; 52, auxiliary air duct; 53, adjustment plate; 54, limiting inclined plate; 531, sector gear; 61, driving rod; 62, second driving rack. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] As Figure 1 and Figure 5 shown, a device for reducing the boiler flue gas temperature and improving the energy utilization efficiency includes a main energy exchange chamber 1, a first secondary energy exchange chamber 2, a second secondary energy exchange chamber 3, and an energy conversion group board 4. One side of the main energy exchange chamber 1 is fixedly connected to the first secondary energy exchange chamber 2, and the other side of the main energy exchange chamber 1 is fixedly connected to the second secondary energy exchange chamber 3. The bottom of the main energy exchange chamber 1 is the flue gas inlet, and a flue gas duct 17 is fixedly connected to the top of the main energy exchange chamber 1. The energy conversion group board 4 can horizontally slide in the main energy exchange chamber 1, the first secondary energy exchange chamber 2, and the second secondary energy exchange chamber 3; One side of the first secondary energy exchange chamber 2 is fixedly connected to a hydraulic push rod 6. The hydraulic push rod 6 is fixedly connected to one end of the energy conversion group board 4, and the hydraulic push rod 6 can drive the energy conversion group board 4 to horizontally slide left and right; An adjustment chamber 5 is fixedly arranged above the main energy exchange chamber 1. One side of the bottom of the adjustment chamber 5 is communicated with the first secondary energy exchange chamber 2, and the other side of the bottom of the adjustment chamber 5 is communicated with the second secondary energy exchange chamber 3; A plurality of serpentine pipes 11 are fixedly arranged in the main energy exchange chamber 1, and water can flow through the serpentine pipes 11; A cleaning block 13 is arranged in the main energy exchange chamber 1. When the energy conversion group board 4 horizontally slides left and right in the main energy exchange chamber 1, it can drive the cleaning block 13 to horizontally slide back and forth in the main energy exchange chamber 1.

[0029] In this embodiment, the 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 pipes 11, thereby reducing the flue gas temperature. The hydraulic push rod 6 can drive the energy conversion group board 4 to horizontally slide left and right, so that the energy conversion group board 4 absorbs the heat of the flue gas and further reduces the flue gas temperature. After absorbing the flue gas temperature, the energy conversion group board 4 enters the first secondary energy exchange chamber 2 or the second secondary energy exchange chamber 3. The adjustment chamber 5 can adjust the air entering the first secondary energy exchange chamber 2 or the second secondary energy exchange chamber 3 to preheat the air in the first secondary energy exchange chamber 2 or the second secondary energy exchange chamber 3. Finally, preheating the combustion air and heating the feed water are carried out simultaneously, making full use of the flue gas heat. At the same time, when the energy conversion group board 4 horizontally slides left and right in the main energy exchange chamber 1, it can drive the cleaning block 13 to horizontally slide back and forth in the main energy exchange chamber 1, thereby realizing the cleaning of the outer wall of the serpentine pipes 11, preventing the blockage of the flue gas duct, and improving the energy utilization rate of the flue gas.

[0030] As Figure 2 - Figure 7As shown in the figure, one end of the front side of the main energy exchange chamber 1 is fixedly connected to the main water inlet pipe 14, and the other end of the front side of the main energy exchange chamber 1 is fixedly connected to the main water outlet pipe 15. 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 communicated with the main water inlet pipe 14, and the water outlet 112 is communicated with the main water outlet pipe 15; A plurality of threaded rods 12 are rotatably connected in the main energy exchange chamber 1. The threaded rods 12 are arranged in the horizontal gaps of the serpentine pipes 11. A plurality of cleaning blocks 13 are provided. The threaded rods 12 penetrate through the cleaning blocks 13, and the cleaning blocks 13 are threadedly connected with the threaded rods 12; Arc-shaped grooves are provided on both sides of the cleaning block 13. The arc-shaped grooves are slidably connected with the outer wall of the serpentine pipe 11. A plurality of ash discharge slits 131 are provided on the cleaning block 13; One end of the threaded rod 12 is fixedly connected to a driven gear 121. A first driving rack 421 is fixedly connected to the energy conversion group plate 4. The first driving rack 421 meshes with the driven gear 121.

[0031] In this embodiment, the hydraulic push rod 6 drives the energy conversion group plate 4 to slide horizontally left and right. The first driving rack 421 slides horizontally left and right accordingly, and then drives the driven gear 121 to rotate. The rotation of the driven gear 121 drives the threaded rod 12 to rotate, and then 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 pipe 11, realizing the cleaning of the outer wall of the serpentine pipe 11. The setting of the ash discharge slits 131 enables the dust and impurities generated by the cleaning and scraping to be blown away by the flue gas from the ash discharge slits 131, preventing the accumulation of dust and impurities.

[0032] As Figure 1 and Figure 5 - Figure 10 As shown in the figure, through grooves 16 allowing the energy conversion group plate 4 to pass through are provided on the side walls of the main energy exchange chamber 1, the first secondary energy exchange chamber 2, and the second secondary energy exchange chamber 3. The energy conversion group plate 4 can pass through the gap between two layers of the serpentine pipes 11. The energy conversion group plate 4 includes a first blocking plate 41, a first heat storage plate 42, a second heat storage plate 43, and a second blocking plate 44. The first heat storage plate 42 and the second heat storage plate 43 are fixedly connected. The first blocking plate 41 is fixedly connected to one side of the first heat storage plate 42. The second blocking plates 44 are symmetrically fixedly connected to one side of the second heat storage plate 43. Heat absorption corrugated plates 45 are provided in both the first heat storage plate 42 and the second heat storage plate 43; A first air duct 21 is fixedly connected to the top of the first secondary energy exchange chamber 2. A second air duct 31 is fixedly connected to the top of the second secondary energy exchange chamber 3. The first air duct 21 is communicated with the first secondary energy exchange chamber 2. The second air duct 31 is communicated with the second secondary energy exchange chamber 3. A receiving chamber 32 is provided on one side of the second secondary energy exchange chamber 3. The receiving chamber 32 can receive the second blocking plate 44. One end of the first blocking plate 41 is fixedly connected to the hydraulic push rod 6; The adjustment chamber 5 includes a main air duct 51 and a secondary air duct 52. The bottom of the main air duct 51 is communicated with the first air duct 21, and the bottom of the secondary air duct 52 is communicated with the second air duct 31. The main air duct 51 and the secondary air duct 52 are communicated with each other; A regulating plate 53 is rotatably connected at the connection of the main air duct 51 and the secondary air duct 52. A limiting inclined plate 54 is fixedly arranged on one side of the main air duct 51 close to the rotating shaft of the regulating plate 53. A sector gear 531 is fixedly connected to the rotating shaft of the regulating plate 53. One end of a hydraulic push rod 6 is fixedly connected to a driving rod 61. A second driving rack 62 is arranged on the driving rod 61, and the second driving rack 62 meshes with the sector gear 531.

[0033] In this embodiment, when the hydraulic push rod 6 pushes the transducer group plate 4 to slide horizontally in the direction of the second secondary energy exchange chamber 3, the second driving rack 62 drives the sector gear 531 to rotate forward, that is, the regulating plate 53 rotates in the direction of the main air duct 51. The air to be preheated entering the main air duct 51 enters the second secondary energy exchange chamber 3 from the secondary 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 secondary energy exchange chamber 3, so that the air to be preheated blows towards the second heat storage plate 43 that has been heated in the main energy exchange chamber 1; When the hydraulic push rod 6 pushes the transducer group plate 4 to slide horizontally in the direction of the first secondary energy exchange chamber 2, the second driving rack 62 drives the sector gear 531 to rotate reversely, that is, the regulating plate 53 rotates in the direction of the secondary air duct 52. When the regulating plate 53 stands vertically, the air to be preheated entering the main air duct 51 enters the first secondary 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 secondary energy exchange chamber 2, so that the air to be preheated blows towards the first heat storage plate 42 that has been heated in the main energy exchange chamber 1, and finally realizes the sustainable heating of the air to be preheated entering the adjustment chamber 5; The first baffle 41 can be in the first secondary energy exchange chamber 2 or on one side of the first secondary energy exchange chamber 2. The second baffle 44 can be in the accommodation chamber 32 or the second secondary energy exchange chamber 3. The first baffle 41 can block the air reflux in the first secondary energy exchange chamber 2 in the first secondary energy exchange chamber 2, and the second baffle 44 can block the air reflux in the second secondary energy exchange chamber 3 in the second secondary energy exchange chamber 3.

[0034] Working principle: During operation, the 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 temperature of the flue gas. The hydraulic push rod 6 can drive the transducer group plate 4 to slide horizontally back and forth; 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 secondary 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 secondary energy exchange chamber 2. That is, when the first heat storage plate 42 absorbs the heat of the flue gas in the main energy exchange chamber 1, the second heat storage plate 43 preheats the air in the second secondary energy exchange chamber 3. When the second heat storage plate 43 absorbs the heat of the flue gas in the main energy exchange chamber 1, the first heat storage plate 42 preheats the air in the first secondary energy exchange chamber 2; When the hydraulic push rod 6 pushes the energy conversion group plate 4 to slide horizontally in the direction of the second secondary energy exchange chamber 3, the second driving 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 entering the main air duct 51 enters the second secondary energy exchange chamber 3 from the secondary 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 secondary energy exchange chamber 3, so that the air to be preheated blows towards the second heat storage plate 43 that has been heated in the main energy exchange chamber 1; When the hydraulic push rod 6 pushes the energy conversion group plate 4 to slide horizontally in the direction of the first secondary energy exchange chamber 2, the second driving rack 62 drives the sector gear 531 to rotate in reverse, that is, the adjusting plate 53 rotates towards the secondary air duct 52. When the adjusting plate 53 is vertically erected, the air to be preheated entering the main air duct 51 enters the first secondary 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 secondary energy exchange chamber 2, so that the air to be preheated blows towards the first heat storage plate 42 that has been heated in the main energy exchange chamber 1, and finally realizes the continuous heating of the air to be preheated entering the adjustment chamber 5; The air preheated in the first secondary energy exchange chamber 2 and the second secondary energy exchange chamber 3 both leads to the boiler combustion chamber, effectively saving energy; During this process, the hydraulic push rod 6 drives the energy conversion group plate 4 to slide horizontally left and right, and the first driving rack 421 slides horizontally left and right accordingly, and then drives the driven gear 121 to rotate. The rotation of the driven gear 121 drives the threaded rod 12 to rotate, and then 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, realizing the cleaning of the outer wall of the serpentine tube 11. The setting of the ash discharge seam 131 enables the dust and impurities generated by the cleaning and scraping to be blown away by the flue gas from the ash discharge seam 131, preventing the accumulation of dust and impurities, preventing the blockage of the smoke exhaust passage, ensuring that the serpentine tube 11 absorbs heat, and reducing the maintenance frequency.

[0035] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A device for reducing the boiler flue gas temperature and improving the energy utilization efficiency, comprising a main energy exchange chamber (1), a first secondary energy exchange chamber (2), a second secondary energy exchange chamber (3) and an energy conversion group board (4), characterized in that, One side of the main energy exchange chamber (1) is fixedly connected to a first auxiliary energy exchange chamber (2), the other side of the main energy exchange chamber (1) is fixedly connected to a second auxiliary energy exchange chamber (3), 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 smoke exhaust duct (17). The energy conversion group plate (4) can horizontally slide in the main energy exchange chamber (1), the first auxiliary energy exchange chamber (2) and the second auxiliary energy exchange chamber (3). One side of the first auxiliary energy exchange chamber (2) is fixedly connected to a hydraulic push rod (6), the hydraulic push rod (6) is fixedly connected to one end of the energy conversion group plate (4), and the hydraulic push rod (6) can drive the energy conversion group plate (4) to horizontally slide left and right. An adjustment chamber (5) is fixedly arranged above the main energy exchange chamber (1). One side of the bottom of the adjustment chamber (5) is communicated with the first auxiliary energy exchange chamber (2), and the other side of the bottom of the adjustment chamber (5) is communicated with the second auxiliary energy exchange chamber (3). A plurality of serpentine tubes (11) are fixedly arranged in the main energy exchange chamber (1), and water can flow through the serpentine tubes (11). A cleaning block (13) is arranged in the main energy exchange chamber (1). When the energy conversion group plate (4) horizontally slides left and right in the main energy exchange chamber (1), it can drive the cleaning block (13) to horizontally slide back and forth in the main energy exchange chamber (1).

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

3. The device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to claim 2, wherein A plurality of threaded rods (12) are rotatably connected in the main energy exchange chamber (1). The threaded rods (12) are arranged in the horizontal gaps of the serpentine tubes (11). A plurality of cleaning blocks (13) are provided. The threaded rods (12) penetrate through the cleaning blocks (13), and the cleaning blocks (13) are threadedly connected to the threaded rods (12).

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

5. The device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to claim 4, characterized in that, One end of the threaded rod (12) is fixedly connected to a driven gear (121), and a first driving rack (421) is fixedly connected to the energy conversion group plate (4). The first driving rack (421) is engaged with the driven gear (121).

6. The device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to claim 1, wherein On the side walls of the main energy exchange chamber (1), the first auxiliary energy exchange chamber (2), and the second auxiliary energy exchange chamber (3), there are through slots (16) allowing the energy conversion group plates (4) to pass through. The energy conversion group plates (4) can pass through the gap between two layers of the serpentine pipe (11). The energy conversion group plates (4) include a first blocking plate (41), a first heat storage plate (42), a second heat storage plate (43), and a second blocking plate (44). The first heat storage plate (42) and the second heat storage plate (43) are fixedly connected. The first blocking plate (41) is fixedly connected to one side of the first heat storage plate (42). The second blocking plate (44) is symmetrically and fixedly connected to one side of the second heat storage plate (43). Heat absorption corrugated plates (45) are arranged in both the first heat storage plate (42) and the second heat storage plate (43).

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

8. The device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to claim 7, wherein, The adjustment chamber (5) includes a main air duct (51) and an auxiliary air duct (52). The bottom of the main air duct (51) communicates with the first air duct (21). The bottom of the auxiliary air duct (52) communicates with the second air duct (31). The main air duct (51) and the auxiliary air duct (52) communicate with each other.

9. The device for reducing the boiler flue gas temperature and improving the energy utilization efficiency according to claim 8, characterized in that, A regulating plate (53) is rotatably connected at the connection of the main air duct (51) and the auxiliary air duct (52). A limiting inclined plate (54) is fixedly arranged on one side of the main air duct (51) close to the rotating shaft of the regulating plate (53). A sector gear (531) is fixedly connected to the rotating shaft of the regulating plate (53). One end of the hydraulic push rod (6) is fixedly connected to a driving rod (61). A second driving rack (62) is arranged on the driving rod (61). The second driving rack (62) meshes with the sector gear (531).

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