Sintering flue gas waste heat recycling device

Abstract

The invention relates to the technical field of waste heat utilization, and provides a sintering flue gas waste heat recycling device which comprises a device shell, the left side and the right side of the device shell are each of a conical structure, and the front side of the device shell is fixedly connected with an L-shaped heat insulation plate; the large-particle dust waste heat recovery assembly is arranged on the left side of the device shell; the intelligent exhaust opening degree regulation and control assembly is arranged on the right side of the device shell; and the heat exchange tube cleaning assembly is arranged in the device shell. According to the technical scheme, the problem that in the prior art, unburnt carbon particles and high-temperature large-particle dust in smoke cannot be effectively recycled is solved; the opening degree of the exhaust port is fixed and cannot be adjusted according to flue gas temperature and flow changes; the dust accumulation amount on the surface of the heat exchange tube is gradually increased, and the heat transfer efficiency is obviously reduced by a formed heat insulation layer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste heat utilization, in particular to a sintering flue gas waste heat recycling device. BACKGROUND

[0002] In the metallurgical industry, the sintering process has high energy consumption, and the recycling of sintering flue gas waste heat has always been a research focus. The existing technology has made certain progress, for example, by setting a waste heat boiler, making its flue gas inlet communicate with the sintering section flue of the sintering machine, receiving the flue gas therein, and using the heat in the flue gas to generate steam; the steam inlet of the steam turbine is also communicated with the steam outlet of the waste heat boiler, so that the steam drives the steam turbine to work, thereby driving the pump, compressor, fan and other equipment to work. In addition, there are technologies that combine sintering and circular cooling waste heat flue gas heat energy power generation to realize waste heat recycling and tail gas treatment, and technologies that use high-efficiency eccentric radial heat pipe waste heat boilers to absorb flue gas waste heat to produce steam.

[0003] In the prior art, the unburned carbon particles and high-temperature large-particle dust in the flue gas cannot be effectively recycled, and these carbon particles and high-temperature dust containing a large amount of waste heat are directly discharged, resulting in low energy utilization and serious energy waste. In the prior art, the exhaust port opening degree is fixed and cannot be adjusted according to changes in flue gas temperature and flow rate. When the flue gas volume is too large, the flue gas stays in the device for a short time, and the heat is not fully exchanged before being discharged, resulting in insufficient waste heat recovery. When the flue gas volume is too small, the heat carried by the flue gas is insufficient to meet the heat exchange demand, resulting in fluctuating and overall low heat exchange efficiency. In addition, in the prior art, as the running time increases, the amount of dust accumulated on the surface of the heat exchange tube gradually increases, forming an insulating layer that significantly reduces the heat transfer efficiency. Even if the flue gas carries a large amount of waste heat, it is difficult to effectively transfer the heat to the water in the heat exchange tube, resulting in a large amount of waste heat being directly discharged with the flue gas, and the waste heat recovery effect of the device is greatly attenuated. SUMMARY

[0004] To overcome the above-mentioned defects, the present application provides a sintering flue gas waste heat recycling device, which solves the technical problems that the unburned carbon particles and high-temperature large-particle dust in the flue gas cannot be effectively recycled in the prior art; the exhaust port opening degree is fixed and cannot be adjusted according to changes in flue gas temperature and flow rate; and the amount of dust accumulated on the surface of the heat exchange tube gradually increases, forming an insulating layer that significantly reduces the heat transfer efficiency.

[0005] According to one aspect, at least one embodiment of the present application provides a sintering flue gas waste heat recycling device, comprising: The device shell is provided with a left side and a right side, both of which are conical structures, the front side of the device shell is fixedly connected with an L-shaped heat insulation plate, the front side of the L-shaped heat insulation plate is fixedly connected with a controller, the front right corner of the device shell is fixedly connected with a liquid inlet pipe one, the rear left corner of the device shell is fixedly connected with a liquid outlet pipe one, and the inner walls of the front and rear sides of the device shell are fixedly connected with heat exchange pipes. A large-particle dust waste heat recovery assembly is arranged on the left side of the device shell. An exhaust port opening degree intelligent control assembly is arranged on the right side of the device shell, and the exhaust port opening degree intelligent control assembly is used for intelligently controlling the flow of flue gas. A heat exchange pipe cleaning assembly is arranged in the device shell, and the heat exchange pipe cleaning assembly is used for cleaning dust on the outer wall of the heat exchange pipe to improve the heat exchange efficiency.

[0006] For example, in the sintering flue gas waste heat recovery device, the bottom of the device shell is fixedly connected with four supporting legs one, the bottom of each of the four supporting legs one is fixedly connected with an anti-skid pad, the front water inlet of the heat exchange pipe penetrates the outer wall of the device shell and is fixedly connected with the liquid inlet pipe one, the rear water outlet of the heat exchange pipe penetrates the outer wall of the device shell and is fixedly connected with the liquid outlet pipe one, the bottom of the device shell is fixedly connected with a dust collecting hopper one in communication with the inside of the device shell, the outer wall of the bottom of the dust collecting hopper one is fixedly connected with a blowdown valve, the inner top wall of the device shell is fixedly connected with a temperature sensor, and the controller is electrically connected with the blowdown valve and the temperature sensor.

[0007] For example, in the sintering flue gas waste heat recovery device, the large-particle dust waste heat recovery assembly comprises a heat exchange cylinder, the left side of the heat exchange cylinder is fixedly connected with an air outlet pipe in communication with the inside of the heat exchange cylinder, the inner wall of the air outlet pipe is fixedly connected with a protective coarse mesh, the right side of the heat exchange cylinder is fixedly connected with an air inlet pipe in communication with the inside of the heat exchange cylinder, the inner wall of the air inlet pipe is fixedly connected with a fine filter mesh, the right side of the air inlet pipe is fixedly connected with the device shell and communicates with each other, the bottom of the heat exchange cylinder is fixedly connected with four supporting legs two distributed in a rectangular shape, and the top of the heat exchange cylinder is fixedly connected with a driving bin.

[0008] For example, at least one embodiment of the present invention provides a sintering flue gas waste heat recycling device, the front side of the driving bin is fixedly connected with a motor one, the inside of the driving bin is rotatably connected with a rotating shaft, the front side of the outer wall of the rotating shaft is fixedly connected with a bevel gear one, the bottom of the bevel gear one is meshedly connected with a bevel gear two, the bottom of the bevel gear two is fixedly connected with a rotating rod rotatably connected with a heat exchange cylinder, the bottom of the rotating rod penetrates into the inside of the heat exchange cylinder, the bottom of the outer wall of the rotating rod is rotatably connected with four crushing rollers arranged in an annular array, the inner wall of the heat exchange cylinder is fixedly connected with a filter screen, and the upper surface of the filter screen is tightly attached to the outer wall of the four crushing rollers.

[0009] For example, at least one embodiment of the present invention provides a sintering flue gas waste heat recycling device, the bottom of the filter screen is provided with a dust collecting hopper two fixedly connected with the inner wall of the heat exchange cylinder, a heat exchange cavity is formed between the dust collecting hopper two and the heat exchange cylinder, the bottom front side of the outer wall of the heat exchange cylinder is fixedly connected with a liquid outlet pipe two in communication with the inside of the heat exchange cavity, the bottom rear side of the outer wall of the heat exchange cylinder is fixedly connected with a liquid inlet pipe two in communication with the inside of the heat exchange cavity, the middle part of the outer wall of the rotating shaft is fixedly connected with a cam, the inner walls of the left and right sides of the driving bin are both fixedly connected with hollow limiting blocks, the inside of the left and right two hollow limiting blocks is slidably connected with a lifting frame, the outer wall of the cam is periodically in rolling contact with the inner top wall of the lifting frame, the bottom of the lifting frame penetrates into the inside of the heat exchange cylinder and is fixedly connected with a lifting plate, the outer wall of the lifting frame is slidably connected with the heat exchange cylinder, the lifting plate is movably connected with the outer wall of the rotating rod, and the left and right sides of the lifting plate are both fixedly connected with arc-shaped scrapers.

[0010] For example, at least one embodiment of the present invention provides a sintering flue gas waste heat recycling device, the outer wall of the arc-shaped scraper on the left side is tightly attached to the protective coarse mesh inside the air outlet pipe, the outer wall of the arc-shaped scraper on the right side is tightly attached to the fine filter screen inside the air inlet pipe, the bottom of the dust collecting hopper two penetrates into the bottom of the heat exchange cylinder and is fixedly connected with a discharging valve, and the controller is electrically connected with the motor one and the discharging valve respectively.

[0011] For example, at least one embodiment of the present invention provides a sintering flue gas waste heat recycling device, the exhaust port opening degree intelligent control assembly comprises a fixed ring and a rotating ring, the fixed ring is fixedly connected to the right side of the device shell, a plurality of straight slot holes arranged in an annular array and pointing to the center of the fixed ring are formed in the right side of the fixed ring, the inside of each of the plurality of straight slot holes is slidably connected with a limiting slider two, the right end of each of the plurality of limiting slider twos is fixedly connected with a sealing blade, the right end of each of the plurality of sealing blades is fixedly connected with a limiting slider one, a plurality of inclined slot holes arranged in an annular array are formed in the right side of the rotating ring, and the outer wall of the limiting slider one is slidably connected with the inside of the inclined slot hole.

[0012] For example, the sintering flue gas waste heat recycling device provided by at least one embodiment of the present application comprises a fixed ring, a fixed column one is fixedly connected to the side wall of the fixed ring, an electric telescopic rod is rotatably connected to the outer wall of the fixed column one, and a fixed column two fixedly connected to the side wall of a rotating ring is rotatably connected to the telescopic end of the electric telescopic rod.

[0013] For example, the sintering flue gas waste heat recycling device provided by at least one embodiment of the present application comprises a fixed ring, a fixed column one is fixedly connected to the side wall of the fixed ring, an electric telescopic rod is rotatably connected to the outer wall of the fixed column one, and a fixed column two fixedly connected to the side wall of a rotating ring is rotatably connected to the telescopic end of the electric telescopic rod.

[0014] For example, the sintering flue gas waste heat recycling device provided by at least one embodiment of the present application comprises a fixed ring, a fixed column one is fixedly connected to the side wall of the fixed ring, an electric telescopic rod is rotatably connected to the outer wall of the fixed column one, and a fixed column two fixedly connected to the side wall of a rotating ring is rotatably connected to the telescopic end of the electric telescopic rod.

[0015] The embodiment of the present application has the following beneficial effects: In the present application, the large-particle dust waste heat recycling assembly can crush high-temperature particle dust and unburned carbon particles, promote the release of heat stored by the dust and carbon particles, and absorb the heat by water through the heat exchange cavity, thereby effectively utilizing the dust waste heat that is easily ignored in the traditional waste heat recycling mode and further improving the waste heat recycling efficiency of the overall device. The exhaust port opening degree intelligent control assembly can adjust the exhaust port opening degree according to the data fed back by the temperature sensor and the flue gas flow sensor, ensure that the amount of flue gas entering the device matches the heat exchange demand, reduce the opening degree when the flue gas temperature is too high to prolong the flue gas residence time, fully utilize the waste heat, increase the opening degree when the temperature is too low to accelerate the flue gas flow, and maintain the optimal heat exchange state at all times, thereby optimizing the heat exchange efficiency. The heat exchange pipe cleaning assembly can periodically or in real time clean the surface of the heat exchange pipe, remove the attached dust, avoid the dust layer from hindering heat transfer, ensure that the heat exchange pipe always maintains good heat exchange contact with the flue gas, thereby maintaining stable waste heat recycling efficiency of the device and avoiding energy waste caused by reduced heat exchange efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some of the example embodiments of the present application. For those skilled in the art, other drawings can also be obtained from the contents of the example embodiments of the present application and the drawings without any creative effort.

[0017] Figure 1 Structure schematic diagram of front view angle in one embodiment of the present application; Figure 2 Structure schematic diagram of rear view angle in one embodiment of the present application; Figure 3 Structure schematic diagram of internal structure in one embodiment of the present application; Figure 4 Structure schematic diagram of large-particle dust waste heat recovery assembly in one embodiment of the present application; Figure 5 Structure schematic diagram of internal structure of large-particle dust waste heat recovery assembly in one embodiment of the present application; Figure 6 Structure schematic diagram of exhaust port opening intelligent control assembly in one embodiment of the present application; Figure 7 Structure schematic diagram of heat exchange pipe cleaning assembly in one embodiment of the present application.

[0018] In the drawings: 1, device shell; 10, L-shaped heat insulation plate; 11, controller; 12, leg one; 13, non-slip pad; 14, liquid inlet pipe one; 15, liquid outlet pipe one; 16, heat exchange pipe; 17, dust collecting hopper one; 18, blowdown valve; 19, temperature sensor; 2, large-particle dust waste heat recovery assembly; 20, heat exchange cylinder; 21, air inlet pipe; 22, air outlet pipe; 23, liquid inlet pipe two; 24, liquid outlet pipe two; 25, driving bin; 26, motor one; 27, rotating shaft; 28, bevel gear one; 29, bevel gear two; 210, rotating rod; 211, crushing roller; 212, filter screen; 213, dust collecting hopper two; 214, heat exchange cavity; 215, leg two; 216, cam; 217, lifting frame; 218, hollow limiting block; 219, lifting plate; 220, arc-shaped scraper; 3, exhaust port opening intelligent control assembly; 30, fixed ring; 31, straight slot hole; 32, rotating ring; 33, sealing blade; 34, limiting slide block one; 35, limiting slide block two; 36, inclined slot hole; 37, fixed column one; 38, fixed column two; 39, electric telescopic rod; 4, heat exchange pipe cleaning assembly; 40, lead screw; 41, motor two; 42, cleaning frame; 43, ear seat. DETAILED DESCRIPTION

[0019] The present application will be further described below in conjunction with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the present application, but not to limit the present application.

[0020] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figures 1-5 As shown, it illustrates a sintering flue gas waste heat recovery and utilization device according to an embodiment of the present invention, comprising: The device shell 1, the left and right sides of the device shell 1 are both tapered structures, the front side of the device shell 1 is fixedly connected with an L-shaped heat insulation plate 10, the front side of the L-shaped heat insulation plate 10 is fixedly connected with a controller 11, the front right corner of the device shell 1 is fixedly connected with a liquid inlet pipe one 14, the rear left corner of the device shell 1 is fixedly connected with a liquid outlet pipe one 15, and the inner walls of the front and rear sides of the device shell 1 are fixedly connected with heat exchange pipes 16. The large-particle dust waste heat recovery assembly 2 is arranged on the left side of the device shell 1. The exhaust port opening degree intelligent control assembly 3 is arranged on the right side of the device shell 1, and is used for intelligently controlling the flow of flue gas. The heat exchange pipe cleaning assembly 4 is arranged in the device shell 1, and is used for cleaning the dust on the outer walls of the heat exchange pipes 16 to improve the heat exchange efficiency.

[0026] In some examples, the left and right sides of the device shell 1 are both tapered structures, which are welded by steel plates, the front side of the device shell 1 is fixedly connected with an L-shaped heat insulation plate 10 through bolts, the L-shaped heat insulation plate 10 is made of aluminum silicate insulation plate material, the front side of the L-shaped heat insulation plate 10 is fixedly connected with a controller 11 through screws, the controller 11 is a programmable logic controller with a model of PLC S7-1200, the liquid inlet pipe one 14 and the liquid outlet pipe one 15 are both seamless steel pipes with DN50, and the inner walls of the front and rear sides of the device shell 1 are fixedly connected with heat exchange pipes 16 which are arranged in a serpentine shape.

[0027] The bottom of the device shell 1 is fixedly connected with four supporting legs one 12, the bottoms of the four supporting legs one 12 are fixedly connected with anti-skid pads 13, the front water inlets of the heat exchange pipes 16 penetrate through the outer wall of the device shell 1 and are fixedly connected with the liquid inlet pipe one 14, the rear water outlets of the heat exchange pipes 16 penetrate through the outer wall of the device shell 1 and are fixedly connected with the liquid outlet pipe one 15, the bottom of the device shell 1 is fixedly connected with a dust collecting hopper one 17 which communicates with the inside of the device shell 1, the outer wall bottom of the dust collecting hopper one 17 is fixedly connected with a blowdown valve 18, the inner top wall of the device shell 1 is fixedly connected with a temperature sensor 19, and the controller 11 is electrically connected with the blowdown valve 18 and the temperature sensor 19 respectively.

[0028] In some examples, the bottom of the four legs 12 is fixedly connected with the anti-skid pad 13 by glue, the anti-skid pad 13 is made of rubber material, the front side water inlet of the heat exchange pipe 16 penetrates the outer wall of the device shell 1 and is fixedly connected with the liquid inlet pipe 14 by welding, the rear side water outlet of the heat exchange pipe 16 penetrates the outer wall of the device shell 1 and is fixedly connected with the liquid outlet pipe 15 by welding, the outer wall bottom of the dust hopper 17 is fixedly connected with the blowdown valve 18 through the flange, the blowdown valve 18 is an electric ball valve with a model of DN40, the inner top wall of the device shell 1 is fixedly connected with the temperature sensor 19 through the screw, the temperature sensor 19 is a platinum resistance temperature sensor with a model of PT100, and the controller 11 is electrically connected with the blowdown valve 18 and the temperature sensor 19 through wires.

[0029] The large-particle dust waste heat recovery assembly 2 comprises a heat exchange cylinder 20, the left side of the heat exchange cylinder 20 is fixedly connected with an air outlet pipe 22 in communication with the inside of the heat exchange cylinder 20, the inner wall of the air outlet pipe 22 is fixedly connected with a protective coarse mesh, the right side of the heat exchange cylinder 20 is fixedly connected with an air inlet pipe 21 in communication with the inside of the heat exchange cylinder 20, the inner wall of the air inlet pipe 21 is fixedly connected with a fine filter mesh, the right side of the air inlet pipe 21 is fixedly connected with the device shell 1 and communicates with each other, the bottom of the heat exchange cylinder 20 is fixedly connected with four rectangularly distributed legs 215, and the top of the heat exchange cylinder 20 is fixedly connected with a driving bin 25.

[0030] The front side of the driving bin 25 is fixedly connected with a motor 26, the inside of the driving bin 25 is rotatably connected with a rotating shaft 27, the outer wall of the front side of the rotating shaft 27 is fixedly connected with a bevel gear 28, the bottom of the bevel gear 28 is meshingly connected with a bevel gear 29, the bottom of the bevel gear 29 is fixedly connected with a rotating rod 210 rotatably connected with the heat exchange cylinder 20, the bottom of the rotating rod 210 penetrates to the inside of the heat exchange cylinder 20, the outer wall of the bottom of the rotating rod 210 is rotatably connected with four annularly arrayed crushing rollers 211, the inner wall of the heat exchange cylinder 20 is fixedly connected with a filter mesh 212, and the upper surface of the filter mesh 212 is closely attached to the outer wall of the four crushing rollers 211.

[0031] The lower part of the filter screen 212 is provided with a dust collecting bin two 213 fixedly connected with the inner wall of the heat exchange cylinder 20, a heat exchange cavity 214 is arranged between the dust collecting bin two 213 and the heat exchange cylinder 20, the bottom of the outer wall of the heat exchange cylinder 20 is fixedly connected with a liquid outlet pipe two 24 in communication with the inside of the heat exchange cavity 214, the bottom of the outer wall of the heat exchange cylinder 20 is fixedly connected with a liquid inlet pipe two 23 in communication with the inside of the heat exchange cavity 214, the middle part of the outer wall of the rotating shaft 27 is fixedly connected with a cam 216, the inner walls of the left and right sides of the drive bin 25 are both fixedly connected with hollow limiting blocks 218, the inside of the left and right two hollow limiting blocks 218 is slidingly connected with a lifting frame 217, the outer wall of the cam 216 protrudes and periodically rolls in contact with the inner top wall of the lifting frame 217, the bottom of the lifting frame 217 penetrates into the inside of the heat exchange cylinder 20 and is fixedly connected with a lifting plate 219, the outer wall of the lifting frame 217 is slidingly connected with the heat exchange cylinder 20, the lifting plate 219 is movably connected with the outer wall of the rotating rod 210, and the left and right sides of the lifting plate 219 are both fixedly connected with arc-shaped scrapers 220.

[0032] The outer wall of the left arc-shaped scraper 220 is closely attached to the protective coarse mesh inside the air outlet pipe 22, the outer wall of the right arc-shaped scraper 220 is closely attached to the fine filter screen inside the air inlet pipe 21, the bottom of the dust collecting bin two 213 penetrates into the bottom of the heat exchange cylinder 20 and is fixedly connected with a discharging valve, and the controller 11 is electrically connected with the motor one 26 and the discharging valve respectively.

[0033] In some examples, the inside of the drive bin 25 is rotatably connected with a rotating shaft 27 through a bearing, the bottom of the bevel gear two 29 is fixedly connected with a rotating rod 210 rotatably connected with the heat exchange cylinder 20 through a bearing, the bottom of the rotating rod 210 penetrates into the inside of the heat exchange cylinder 20, the outer wall of the rotating rod 210 is rotatably connected with four ring-shaped arrayed breaking rollers 211 through a bearing, the breaking rollers 211 are made of high-chromium cast iron, the bottom of the dust collecting bin two 213 penetrates into the bottom of the heat exchange cylinder 20 and is fixedly connected with a discharging valve through a flange, the discharging valve is an electric gate valve with a model of DN50, the controller 11 is electrically connected with the motor one 26 and the discharging valve through wires, the protective coarse mesh (high-temperature resistant material) inside the air outlet pipe 22 is not used to intercept large-particle dust and unburned carbon particles, but to prevent the operator from mistakenly putting his hand into the uncooled heat exchange cylinder 20, causing burns, and a negative pressure fan can be additionally arranged in the air outlet pipe 22 to increase the flow rate of flue gas, and the discharging valve is in a normally closed state.

[0034] Sintering flue gas (internal containing unburned carbon particles and large particles of dust) first through the air pipe 22 into the heat exchange cylinder 20 inside, (air pipe 22 in the protective coarse mesh is not to intercept large particles of dust and unburned carbon particles, but to prevent the operator by mistake into the hand in the uncooled heat exchange cylinder 20, resulting in scald) controller 11 start motor 26, drive rotating shaft 27 rotation, on the one hand, rotating shaft 27 through the bevel gear 28 and bevel gear 29 mesh transmission, drive rotating rod 210 and broken roller 211 rotation, on the other hand, rotating shaft 27 on the cam 216 synchronous rotation, its convex part periodically push the lifting frame 217 along the hollow limiting block 218 up and down, drive lifting plate 219 and arc-shaped scraper 220 reciprocating motion, arc-shaped scraper 220 will prevent the coarse mesh and fine filter mesh on the high temperature dust particles scraped off, these scraped off the high temperature dust particles fall to the filter screen 212 surface or dust hopper 213.

[0035] Unburned carbon particles and the above-mentioned scraped off dust on the surface of the filter screen 212 converge, broken by the rotating roller 211 together, and fall into the dust hopper 213, after crushing, unburned carbon particles and high temperature dust particles release their own storage heat, these heat through the inner wall of the dust hopper 213 to the heat exchange cavity 214, at this time, cold water through the inlet pipe 23 into the heat exchange cavity 214, become hot water after absorbing heat from the outlet pipe 24, complete the unburned carbon particles and high temperature dust particles waste heat recovery, broken carbon particles and dust in the dust hopper 213 accumulated to a certain amount, the controller 11 opens the discharge valve to discharge.

[0036] After the heat exchange cylinder 20 treatment of flue gas through the air inlet pipe 21 into the device shell 1 inside, with the water in the heat exchange tube 16 through the inlet pipe 14 into heat exchange, heat transfer in the flue gas to the water in the heat exchange tube 16, make the water temperature rise, the water from the outlet pipe 15 discharge to realize the waste heat recovery, in this embodiment, by setting a large particle dust waste heat recovery assembly 2, can be broken to high temperature particle dust and unburned carbon particles, promote the dust and carbon particles release their own storage heat, these heat through the heat exchange cavity is absorbed by water, realize the effective use of the dust waste heat in the traditional waste heat recovery mode is easily overlooked, further improve the overall device waste heat recovery efficiency.

[0037] As Figure 6As shown, it shows the exhaust opening degree intelligent control assembly 3 in another embodiment of the application, the exhaust opening degree intelligent control assembly 3 includes a fixed ring 30 and a rotating ring 32, the fixed ring 30 is fixedly connected to the right side of the device housing 1, a plurality of straight slot holes 31 are arranged in the form of annular array and are directed to the center of the fixed ring 30 on the right side of the fixed ring 30, a plurality of limit sliders two 35 are slidably connected inside the plurality of straight slot holes 31, a plurality of sealing blades 33 are fixedly connected to the right ends of the plurality of limit sliders two 35, a plurality of limit sliders one 34 are fixedly connected to the right ends of the plurality of sealing blades 33, a plurality of inclined slot holes 36 are arranged in the form of annular array on the right side of the rotating ring 32, and the outer wall of the limit slider one 34 is slidably connected with the inside of the inclined slot hole 36.

[0038] The side wall of the fixed ring 30 is fixedly connected with a fixed column one 37, the outer wall of the fixed column one 37 is rotatably connected with an electric telescopic rod 39, and the telescopic end of the electric telescopic rod 39 is rotatably connected with a fixed column two 38 fixedly connected with the side wall of the rotating ring 32.

[0039] The inside of the fixed ring 30 is fixedly connected with a flue gas flow sensor, and the controller 11 is electrically connected with the electric telescopic rod 39 and the flue gas flow sensor.

[0040] In some examples, the sealing blade 33 is made of Q235 steel plate surface sprayed with high temperature resistant paint, the electric telescopic rod 39 is made of DTZ300 type electric push rod, the telescopic end of the electric telescopic rod 39 is rotatably connected with the fixed column two 38 fixedly connected with the side wall of the rotating ring 32 through the bearing, the inside of the fixed ring 30 is fixedly connected with the flue gas flow sensor through the bolt, the flue gas flow sensor is made of MF5700 type gas mass flow sensor, the two ends of the limit slider one 34 and the limit slider two 35 are limited to slide inside the inclined slot hole 36 and the straight slot hole 31 respectively by the limiting block arranged thereon, and cannot be separated from the groove body, by accurately controlling the flow of flue gas, the broken carbon particles in the dust collecting hopper two 213 can be prevented from moving upward due to pressure.

[0041] The temperature sensor 19 on the inner top wall of the device shell 1 monitors the flue gas temperature in real time, and the flue gas flow sensor in the fixed ring 30 detects the flue gas flow in real time. Both data are transmitted to the controller 11. The controller 11 adjusts the extension amount of the electric telescopic rod 39 according to the received temperature and flow data, drives the rotating ring 32 to rotate relative to the fixed ring 30 through the fixed column two 38, makes the limiting sliding block one 34 slide along the inclined slot hole 36 and the limiting sliding block two 35 slide along the straight slot hole 31, and drives the plurality of sealing blades 33 to open and close synchronously to change the opening degree of the exhaust port, so as to regulate and control the flue gas flow and ensure the heat exchange efficiency. In the embodiment, the exhaust port opening degree intelligent regulation and control assembly 3 is arranged. According to the data fed back by the temperature sensor 19 and the flue gas flow sensor, the opening degree of the exhaust port can be adjusted to ensure that the amount of flue gas entering the device matches the heat exchange demand. When the flue gas temperature is too high, the opening degree can be reduced to prolong the residence time of the flue gas, so as to fully utilize the waste heat. When the temperature is too low, the opening degree can be appropriately increased to accelerate the flue gas flow, so that the flue gas always maintains the best heat exchange state, thereby optimizing the heat exchange efficiency.

[0042] As shown in Figure 7 The heat exchange pipe cleaning assembly 4 in another embodiment of the present application is shown. The heat exchange pipe cleaning assembly 4 includes two lead screws 40, which are respectively rotatably connected to the left and right sides of the inside of the device shell 1. The rear side of the device shell 1 is fixedly connected with two left and right symmetrical motors two 41. The output ends of the left and right two motors two 41 are respectively fixedly connected with the two lead screws 40. The outer walls of the left and right two lead screws 40 are respectively threadedly connected with ear seats 43. The opposite surfaces of the left and right two ear seats 43 are fixedly connected with cleaning frames 42 which are slidably connected with the outer walls of the heat exchange pipes 16. The controller 11 is electrically connected with the two motors two 41.

[0043] In some examples, a high-temperature-resistant silica gel scraping ring is mounted on the cleaning frame 42. The controller 11 is electrically connected with the two motors two 41 through wires. The controller 11 controls the cleaning frame 42 to reciprocate forward and backward within a certain range without colliding with the bent part of the heat exchange pipe 16 due to excessive movement.

[0044] At the same time, the controller 11 periodically starts the motor two 41 to drive the lead screw 40 to rotate, so that the ear seat 43 drives the cleaning frame 42 to reciprocate along the outer wall of the heat exchange pipe 16, thereby removing the dust attached to the surface of the heat exchange pipe 16. The dust in the device shell 1 falls into the dust hopper one 17 under the action of gravity. When the accumulated amount reaches a certain amount, the controller 11 opens the blowdown valve 18 to discharge it. In the embodiment, the heat exchange pipe cleaning assembly 4 is arranged. The surface of the heat exchange pipe 16 can be cleaned regularly or in real time to remove the attached dust, so as to avoid the dust layer from hindering heat transfer and ensure that the heat exchange pipe 16 always maintains good heat exchange contact with the flue gas, thereby maintaining stable waste heat recovery efficiency of the device and avoiding energy waste caused by reduced heat exchange efficiency.

[0045] The working principle and use process of the present application: the sintering flue gas (containing unburned carbon particles and large particle dust) first enters the inside of the heat exchange cylinder 20 through the air outlet pipe 22. The protective coarse mesh in the air outlet pipe 22 is not to intercept large particle dust and unburned carbon particles, but to prevent the operator from mistakenly putting his hand into the uncooled heat exchange cylinder 20, causing burns. The controller 11 starts the motor 1 26 to drive the rotating shaft 27 to rotate. On the one hand, the rotating shaft 27 drives the rotating rod 210 and the crushing roller 211 to rotate through the meshing transmission of the bevel gear 1 28 and the bevel gear 2 29. On the other hand, the cam 216 on the rotating shaft 27 rotates synchronously, and its protruding part periodically pushes the lifting frame 217 to slide up and down along the hollow limiting block 218, driving the lifting plate 219 and the arc-shaped scraper 220 to reciprocate. The arc-shaped scraper 220 scrapes off the high-temperature dust particles attached to the protective coarse mesh and the fine filter mesh. These scraped off high-temperature dust particles fall onto the surface of the filter mesh 212 or into the dust collecting hopper 2 13.

[0046] The unburned carbon particles and the above-mentioned scraped off dust gather on the surface of the filter mesh 212 and are crushed together by the rotating crushing roller 211 and fall into the dust collecting hopper 2 13. After crushing, the unburned carbon particles and high-temperature dust particles release the heat stored in themselves. These heat is transferred to the heat exchange cavity 214 through the inner wall of the dust collecting hopper 2 13. At this time, the cold water enters the heat exchange cavity 214 through the liquid inlet pipe 2 3 and becomes hot water after absorbing heat and is discharged from the liquid outlet pipe 2 4, completing the recovery of the waste heat of the unburned carbon particles and high-temperature dust particles. When the crushed carbon particles and dust accumulate to a certain amount in the dust collecting hopper 2 13, the controller 1 1 opens the discharge valve to discharge them.

[0047] The flue gas treated by the heat exchange cylinder 20 enters the inside of the device housing 1 through the air inlet pipe 21 and exchanges heat with the water in the heat exchange pipe 16 through the liquid inlet pipe 1 4. The heat in the flue gas is transferred to the water in the heat exchange pipe 16, causing the water temperature to rise. The heated water is discharged from the liquid outlet pipe 1 5 to realize waste heat recovery. In this embodiment, the large particle dust waste heat recovery assembly 2 is set to crush high-temperature particle dust and unburned carbon particles, so as to make the dust and carbon particles release the heat stored in themselves. These heat is absorbed by water through the heat exchange cavity, realizing the effective use of the dust waste heat which is easily ignored in the traditional waste heat recovery method, and further improving the waste heat recovery efficiency of the overall device.

[0048] The temperature sensor 19 of the inner top wall of the device shell 1 monitors the flue gas temperature in real time, and the flue gas flow sensor in the fixed ring 30 detects the flue gas flow in real time. Both data are transmitted to the controller 11. The controller 11 adjusts the extension amount of the electric telescopic rod 39 according to the received temperature and flow data, drives the rotating ring 32 to rotate relative to the fixed ring 30 through the fixed column two 38, makes the limiting sliding block one 34 slide along the inclined slot hole 36 and the limiting sliding block two 35 slide along the straight slot hole 31, and drives the plurality of sealing blades 33 to open and close synchronously to change the opening degree of the exhaust port, so as to regulate and control the flue gas flow and ensure the heat exchange efficiency. In the embodiment, the exhaust port opening degree intelligent regulation and control assembly 3 is arranged. According to the data fed back by the temperature sensor 19 and the flue gas flow sensor, the opening degree of the exhaust port can be adjusted to ensure that the amount of flue gas entering the device matches the heat exchange demand. When the flue gas temperature is too high, the opening degree can be reduced to prolong the residence time of the flue gas, so as to fully utilize the waste heat. When the temperature is too low, the opening degree can be appropriately increased to accelerate the flue gas flow, so that the optimal heat exchange state is always maintained, thereby optimizing the heat exchange efficiency.

[0049] At the same time, the controller 11 periodically starts the motor two 41 to drive the screw rod 40 to rotate, so that the ear seat 43 drives the cleaning frame 42 to reciprocate along the outer wall of the heat exchange pipe 16, and the dust attached to the surface of the heat exchange pipe 16 is removed. The dust in the device shell 1 falls into the dust hopper one 17 under the action of gravity. When the accumulated amount reaches a set amount, the controller 11 opens the blowdown valve 18 to discharge it. In the embodiment, the heat exchange pipe cleaning assembly 4 is arranged. The surface of the heat exchange pipe 16 can be cleaned regularly or in real time to remove the attached dust, so as to avoid that the dust layer hinders heat transfer and ensure that the heat exchange pipe 16 always maintains good heat exchange contact with the flue gas, thereby maintaining stable waste heat recovery efficiency of the device and avoiding energy waste caused by the decrease of heat exchange efficiency.

[0050] It should be particularly pointed out that the elements of the present application which exchange heat or contact heat are all made of high-temperature-resistant materials. At the same time, the flue gas flow sensor, the controller 11, the blowdown valve 18, the temperature sensor 19, the electric telescopic rod 39, and various motors are all common models on the market. Each element is a device or equipment existing in the prior art or a device or equipment that can be realized by the prior art. The power supply, specific composition, and principle thereof are clear to those skilled in the art. At the same time, the fixed connection methods mentioned in the present application can adopt bolts, welding, and adhesion, which are common connection methods existing in the prior art. Therefore, they will not be described in detail.

[0051] It should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application. They should all be covered in the scope of the claims of the present application.

Claims

1. A sintering flue gas waste heat recovery device, characterized by, The utility model relates to a dust heat recovery device, including: The device shell (1) both sides are the taper structure, the front side fixed connection of device shell (1) has L-shaped heat insulation board (10), the front side fixed connection of L-shaped heat insulation board (10) has controller (11), the front side right upper corner fixed connection of device shell (1) has liquid inlet pipe one (14), the rear side left lower corner fixed connection of device shell (1) has liquid outlet pipe one (15), the front and rear two sides inner wall fixed connection of device shell (1) has heat exchange pipe (16); Large particle dust waste heat recovery subassembly (2), large particle dust waste heat recovery subassembly (2) sets up in the left side of device shell (1); Exhaust port opening degree intelligent control subassembly (3), exhaust port opening degree intelligent control subassembly (3) sets up in the right side of device shell (1), exhaust port opening degree intelligent control subassembly (3) is used for carrying out intelligent control to the flow of flue gas; Heat exchange pipe cleaning subassembly (4), heat exchange pipe cleaning subassembly (4) sets up in the inside of device shell (1), heat exchange pipe cleaning subassembly (4) is used for carrying out cleaning to the dust of heat exchange pipe (16) outer wall, to improve the heat exchange efficiency.

2. The sintering flue gas waste heat recovery device according to claim 1, characterized in that, The bottom four corners of device shell (1) are fixedly connected with supporting leg no. The bottom of four supporting leg no. (12) is fixedly connected with antiskid pad (13), the front water inlet of heat exchange pipe (16) penetrates the outer wall of device shell (1) and is fixedly connected with liquid inlet pipe one (14), the rear water outlet of heat exchange pipe (16) penetrates the outer wall of device shell (1) and is fixedly connected with liquid outlet pipe one (15), the bottom of device shell (1) is fixedly connected with dust hopper no. (17) with its inside communication, the outer wall bottom of dust hopper no. (17) is fixedly connected with blowdown valve (18), the inner top wall of device shell (1) is fixedly connected with temperature sensor (19), controller (11) is electrically connected with blowdown valve (18), temperature sensor (19) respectively.

3. The sintering flue gas waste heat recovery device according to claim 1, characterized in that, The large particle dust waste heat recovery subassembly (2) includes heat exchange cylinder (20), the left side fixed connection of heat exchange cylinder (20) has with its inside communication air outlet pipe (22), the inner wall fixed connection of air outlet pipe (22) has protective coarse mesh, the right side fixed connection of heat exchange cylinder (20) has with its inside communication air inlet pipe (21), the inner wall fixed connection of air inlet pipe (21) has fine filter screen, the right side of air inlet pipe (21) is fixedly connected with device shell (1) and is interconnected, the bottom of heat exchange cylinder (20) is fixedly connected with four rectangular distribution supporting leg no. (215), the top of heat exchange cylinder (20) is fixedly connected with drive bin (25).

4. The sintering flue gas waste heat recovery device according to claim 3, characterized in that, The front side of the driving bin (25) is fixedly connected with a motor one (26), the inside of the driving bin (25) is rotatably connected with a rotating shaft (27), the outer wall front side of the rotating shaft (27) is fixedly connected with a bevel gear one (28), the bottom of the bevel gear one (28) is meshedly connected with a bevel gear two (29), the bottom of the bevel gear two (29) is fixedly connected with a rotating rod (210) rotatably connected with the heat exchange cylinder (20), the bottom of the rotating rod (210) penetrates to the inside of the heat exchange cylinder (20), the outer wall bottom of the rotating rod (210) is rotatably connected with four crushing rollers (211) arranged in an annular array, the inner wall of the heat exchange cylinder (20) is fixedly connected with a filter screen (212), and the upper surface of the filter screen (212) is closely attached to the outer wall of the four crushing rollers (211).

5. The sintering flue gas waste heat recovery device according to claim 4, characterized in that, The lower side of the filter screen (212) is provided with a dust collecting hopper two (213) fixedly connected with the inner wall of the heat exchange cylinder (20), a heat exchange cavity (214) is formed between the dust collecting hopper two (213) and the heat exchange cylinder (20), the outer wall bottom front side of the heat exchange cylinder (20) is fixedly connected with a liquid outlet pipe two (24) in communication with the inside of the heat exchange cavity (214), the outer wall bottom rear side of the heat exchange cylinder (20) is fixedly connected with a liquid inlet pipe two (23) in communication with the inside of the heat exchange cavity (214), the outer wall middle part of the rotating shaft (27) is fixedly connected with a cam (216), the inner walls of the left and right sides of the driving bin (25) are both fixedly connected with hollow limiting blocks (218), the inside of the left and right two hollow limiting blocks (218) is slidably connected with a lifting frame (217), the outer wall protrusions of the cam (216) are periodically in rolling contact with the inner top wall of the lifting frame (217), the bottom of the lifting frame (217) penetrates to the inside of the heat exchange cylinder (20) and is fixedly connected with a lifting plate (219), the outer wall of the lifting frame (217) is slidably connected with the heat exchange cylinder (20), the outer wall of the lifting plate (219) is movably connected with the rotating rod (210), and the left and right sides of the lifting plate (219) are both fixedly connected with arc-shaped scrapers (220).

6. The sintering flue gas waste heat recovery device according to claim 5, characterized in that, The outer wall of the left arc-shaped scraper (220) is closely attached to the protective coarse mesh inside the air outlet pipe (22), the outer wall of the right arc-shaped scraper (220) is closely attached to the fine filter screen inside the air inlet pipe (21), the bottom of the dust collecting hopper two (213) penetrates to the bottom of the heat exchange cylinder (20) and is fixedly connected with a discharging valve, and the controller (11) is electrically connected with the motor one (26) and the discharging valve respectively.

7. The sintering flue gas waste heat recovery device according to claim 1, characterized in that, The exhaust port opening degree intelligent control assembly (3) comprises a fixed ring (30) and a rotating ring (32), the fixed ring (30) is fixedly connected to the right side of the device shell (1), a plurality of straight slot holes (31) are arranged in the form of an annular array and are directed to the center of the fixed ring (30) on the right side of the fixed ring (30), a plurality of limiting sliders two (35) are slidably connected inside the straight slot holes (31), a plurality of sealing blades (33) are fixedly connected to the right ends of the limiting sliders two (35), a plurality of limiting sliders one (34) are fixedly connected to the right ends of the sealing blades (33), a plurality of inclined slot holes (36) are arranged in the form of an annular array on the right side of the rotating ring (32), and the outer walls of the limiting sliders one (34) are slidably connected with the interiors of the inclined slot holes (36).

8. The sintering flue gas waste heat recovery device according to claim 7, characterized in that, The side wall of the fixed ring (30) is fixedly connected with a fixed column one (37), the outer wall of the fixed column one (37) is rotatably connected with an electric telescopic rod (39), and the telescopic end of the electric telescopic rod (39) is rotatably connected with a fixed column two (38) fixedly connected with the side wall of the rotating ring (32).

9. The sintering flue gas waste heat recovery device according to claim 8, characterized in that, The interior of the fixed ring (30) is fixedly connected with a flue gas flow sensor, and the controller (11) is electrically connected with the electric telescopic rod (39) and the flue gas flow sensor.

10. The sintering flue gas waste heat recovery device according to claim 1, characterized in that, The heat exchange pipe cleaning assembly (4) comprises two lead screws (40), the two lead screws (40) are rotatably connected to the left and right sides of the interior of the device shell (1) respectively, two left and right symmetrical motors two (41) are fixedly connected to the rear side of the device shell (1), the output ends of the left and right two motors two (41) are penetrated into the interior of the device shell (1) and are fixedly connected with the two lead screws (40) respectively, the outer walls of the left and right two lead screws (40) are threadedly connected with ear seats (43), the opposite surfaces of the left and right two ear seats (43) are fixedly connected with cleaning frames (42) slidably connected with the outer walls of the heat exchange pipes (16), and the controller (11) is electrically connected with the two motors two (41).

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