Calcining furnace waste heat recovery device for preparing zeolite from blast furnace granulated slag

Abstract

The invention relates to the technical field of calcining furnace waste heat recovery, in particular to a calcining furnace waste heat recovery device for preparing zeolite from blast furnace granulated slag, which comprises a waste heat recovery cylinder, a heat conduction layer is arranged in the waste heat recovery cylinder, and the heat conduction layer divides the waste heat recovery cylinder into a gas space and a water storage space from inside to outside; the waste heat recovery cylinder is provided with a plurality of partition plates from top to bottom, and the partition plates divide the gas space and the water storage space into a first gas cavity, a second gas cavity, a third gas cavity, a first water cavity, a second water cavity and a third water cavity from top to bottom. The gas space and the water storage space in the waste heat recovery barrel are divided into the first gas cavity, the second gas cavity and the third gas cavity and the first water cavity, the second water cavity and the third water cavity respectively, heat is absorbed step by step in the process that smoke is transmitted downwards step by step, it is ensured that the heat in the smoke is fully recovered, and the waste heat recovery efficiency is improved. And high-temperature, medium-temperature and low-temperature heat in the flue gas is fully recovered.

Description

Technical Field

[0001] The invention relates to the technical field of calcining furnace waste heat recovery, and in particular to a calcining furnace waste heat recovery device for preparing zeolite from blast furnace slag. Background Art

[0002] Waste heat recovery from the calciner for preparing zeolite from blast furnace slag is an important way to achieve efficient resource utilization and clean production. By recovering the waste heat from the calciner flue gas and cooling system, energy consumption, emissions, and economic and environmental benefits can be effectively reduced. The large amount of flue gas waste heat generated by the calciner during high-temperature operation will not only waste energy but also increase the environmental burden if it is directly discharged. Through the waste heat recovery system, this part of the heat energy can be used to preheat raw materials, heat air, or generate electricity, significantly reducing fuel consumption in the production process.

[0003] The existing waste heat recovery device usually directly discharges the flue gas generated by the calcining furnace into the recovery device, heats water with the heat of the flue gas, and generates water vapor from the water, thereby achieving the effect of waste heat recovery. However, the existing device usually simply discharges the flue gas into the recovery device for single-stage waste heat recovery treatment. However, during the single-stage treatment, the heat in the flue gas cannot be fully utilized in a graded manner, resulting in a low waste heat recovery efficiency. Secondly, the high-temperature flue gas may still contain a large amount of unused medium and low-temperature heat after single-stage recovery, resulting in energy waste. Moreover, the existing waste heat recovery device can only recover waste heat by stirring the flue gas with a constant water volume and a constant stirring speed, but cannot adjust the amount of water to be heated according to the amount of flue gas discharged into the waste heat recovery device, nor can it adjust the stirring speed of the flue gas and water according to the flue gas volume. When the flue gas volume fluctuates, the fixed amount of heated water may lead to reduced heat recovery efficiency, which will cause energy waste when the flue gas volume is small, and may lead to insufficient heat recovery when the flue gas volume is large. Secondly, the stirring speed cannot be adjusted with the flue gas volume, which will affect the heat exchange efficiency between the flue gas and water, resulting in uneven heat transfer, further reducing the waste heat recovery effect. Finally, this device lacking adaptive adjustment function makes it difficult to achieve optimal energy utilization. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a waste heat recovery device for a calcining furnace for preparing zeolite from blast furnace slag, which can effectively solve the problems that the prior art can only perform single-stage waste heat recovery treatment, cannot adjust the amount of water to be heated according to the amount of flue gas discharged into the waste heat recovery device, and cannot adjust the stirring speed of the flue gas and water according to the flue gas amount.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a calcining furnace waste heat recovery device for preparing zeolite from blast furnace slag, comprising: A waste heat recovery cylinder, wherein a heat-conducting layer is arranged inside the waste heat recovery cylinder, and the heat-conducting layer divides the waste heat recovery cylinder from the inside to the outside into a gas space and a water storage space, and the waste heat recovery cylinder is provided with a plurality of partition plates from top to bottom, and the partition plates divide the gas space and the water storage space from top to bottom into a first air cavity, a second air cavity, a third air cavity, a first water cavity, a second water cavity, and a third water cavity, respectively, and every two air cavities and water cavities at the same horizontal level from top to bottom form a primary waste heat recovery space, a secondary waste heat recovery space, and a tertiary waste heat recovery space, respectively; An adaptive adjustment mechanism, wherein the adaptive adjustment mechanism comprises a water stirring frame and an air stirring frame for stirring water and smoke, and the water stirring frame and the air stirring frame stir in a circle and flip up and down; A smoke detection mechanism, which is used to detect the amount and temperature of smoke during each primary treatment; The smoke and water supplement transmission mechanism is used to transmit the smoke downward step by step and supplement water according to the smoke detection mechanism.

[0006] Preferably, the adaptive adjustment mechanism includes a support seat fixedly connected to the bottom end of the waste heat recovery cylinder, and the outer wall of the waste heat recovery cylinder is fixedly connected to a plurality of first support plates arranged in a linear array, and three-level waste heat recovery space corresponds to between the support seat and the first support plate, and secondary waste heat recovery space and tertiary waste heat recovery space correspond to between every two of the first support plates from bottom to top, respectively, and the support seat and the top end of the first support plate are fixedly connected to a motor, and the output end of the motor is fixedly connected to a rotating shaft, and the other end of each rotating shaft is rotatably connected to the bottom end of the first support plate above itself.

[0007] Preferably, the outer wall of the rotating shaft is provided with a sliding groove, the inner wall of the sliding groove is fixedly connected with a slider, the outer wall of the slider is fixedly connected with a gear, and the gear is slidably connected to the outer wall of the rotating shaft, the outer wall of the waste heat recovery cylinder is provided with a plurality of first movable grooves arranged in an upper and lower array, the inner wall of the first movable groove is slidably connected with a first movable block, the outer wall of the first movable block is rotatably connected with a plurality of gear rings, the gear rings are meshed with gears, the bottom ends of the gear rings and the gears are provided with annular rotating grooves, the inner walls of the annular rotating grooves are rotatably connected with a rotating head, and the bottom end of the rotating head is rotatably connected with a connecting plate.

[0008] Preferably, the water stirring frame includes a first rotating ring in contact with the inner wall of the waste heat recovery cylinder, and the outer circumferential wall of the first rotating ring and the inner circumferential wall of the gear ring are both embedded with a first permanent magnet ring, and the two first permanent magnet rings are magnetically attracted to each other, and the outer circumferential wall of the heat conductive layer is provided with a plurality of second movable grooves corresponding to the first movable grooves, the inner wall of the second movable groove is slidably connected to a second movable block, the outer wall of the second movable block is rotatably connected to a second rotating ring, and a plurality of first connecting blocks arranged in a circular array are fixedly connected between the second rotating ring and the first rotating ring.

[0009] Preferably, the first air cavity, the second air cavity, and the third air cavity are all vertically rotatably connected with threaded rods, the outer wall thread sleeves of the threaded rods are provided with threaded sleeves, the air stirring frame includes a second connecting block arranged in a circumferential array on the outer circumferential wall of the threaded sleeve, the bottom end of the second connecting block is fixedly connected with a lifting plate, the other end of the second connecting block is commonly fixedly connected with a third rotating ring, and the outer circumferential wall of the third rotating ring and the inner circumferential wall of the second rotating ring are both embedded with second permanent magnetic rings that are magnetically attracted to each other; The top of the partition plate is provided with a plug hole, the bottom end of the threaded rod is provided with a round hole, the inner top wall of the round hole is fixedly connected with an electromagnetic plate, the bottom end of the electromagnetic plate is fixedly connected with a plastic spring, the other end of the plastic spring is fixedly connected with a magnetic plug, the magnetic plug and the electromagnetic plate magnetically repel each other, and the magnetic plug is intermittently plugged into the round hole.

[0010] Preferably, the smoke detection mechanism comprises an extrusion plate which is slidably connected to the inner walls of the first air cavity, the second air cavity and the third air cavity respectively, and the inner circumferential wall of the extrusion plate is fixedly connected with a threaded ring which is threadedly sleeved on the outer wall of the threaded rod, the inner top walls of the first air cavity, the second air cavity and the third air cavity are all fixedly connected with a detection spring together with the top end of the extrusion plate, an air outlet is provided on the inner top wall of the waste heat recovery cylinder, a detection tube is fixedly connected to the top end of the waste heat recovery cylinder, a vertical block is fixedly connected to the top end of the detection tube, a connecting rod is fixedly connected between the two vertical blocks, and the bottom end of the connecting rod is rotated A detection rod is dynamically connected to the bottom end of the detection rod, and a wind wheel is fixedly connected to the inner wall of one of the vertical blocks. An N-shaped magnetic plate and an S-class magnetic plate are fixedly arranged on the upper and lower sides of the inner wall. A conductive rod is fixedly connected to the outer wall of the detection rod, and the conductive rod is located between the horizontal planes of the N-shaped magnetic plate and the S-class magnetic plate. Temperature detectors are arranged inside the first air cavity, the second air cavity and the third air cavity. The conductive rod is electrically connected to a current detector. The electrical signal of the current detector is connected to a PLC controller. The PLC controller is electrically connected to the motor, the electromagnetic plate and the temperature detector to form a control loop.

[0011] Preferably, the flue gas and water supplementary transmission mechanism includes two second support plates fixedly connected to the outer wall of the waste heat recovery cylinder, and the top of each of the second support plates is fixedly connected to an air pump. The air delivery end of the air pump at the top passes through the inner wall of the waste heat recovery cylinder, the heat conductive layer and extends into the first air cavity, and the air extraction end of the air pump at the bottom passes through the inner wall of the waste heat recovery cylinder, the heat conductive layer and extends into the third air cavity. The outer wall of the waste heat recovery cylinder is fixedly connected to a plurality of third support plates arranged up and down, the top ends of the third support plates are fixedly connected to air pumps, the exhaust ends of the air pumps from top to bottom pass through the inner wall of the waste heat recovery cylinder and extend to the first air cavity, the second air cavity, and the third air cavity respectively, the output ends of the plurality of air pumps are fixedly connected to connecting pipes, and the other ends of the connecting pipes are commonly fixedly connected to an air collecting pipe.

[0012] Preferably, the outer wall of the waste heat recovery cylinder is fixedly connected with a plurality of fourth support plates arranged up and down, and the top ends of the two fourth support plates at the upper part are fixedly connected with a transmission pump, and the air suction ends of the two transmission pumps from top to bottom are respectively connected with the first air cavity and the second air cavity, and the air exhaust ends of the two transmission pumps from top to bottom are respectively connected with the second air cavity and the third air cavity; The top ends of the multiple fourth support plates are fixedly connected to a water pump, and the drainage ends of the water pumps from top to bottom are respectively connected to the first water chamber, the second water chamber, and the third water chamber. The PLC controller is electrically connected to the wind pump, the air pump, the transmission pump, and the water pump to form a transmission loop.

[0013] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0014] 1. By dividing the gas space and water storage space in the waste heat recovery cylinder into multiple air cavities, namely the first air cavity, the second air cavity, the third air cavity and the first water cavity, the second water cavity and the third water cavity, the heat is absorbed step by step during the step-by-step downward transmission of the flue gas, ensuring that the heat in the flue gas is fully recovered, and the high, medium and low temperature heat in the flue gas is fully recovered, thus avoiding the problem of insufficient heat utilization during single-stage recovery.

[0015] 2. The amount and temperature of the flue gas are detected by the flue gas detection mechanism. The PLC controller controls the water pump to inject an appropriate amount of water into the first water chamber, the second water chamber, and the third water chamber according to the detection results to ensure that the water volume matches the flue gas volume and temperature. The water stirring frame and the air stirring frame are driven by the motor. The PLC controller adjusts the speed of the motor according to the flue gas volume and temperature, and then adjusts the stirring speed of the water stirring frame and the air stirring frame to ensure that the flue gas is fully in contact with the water and improve the heat exchange efficiency. The motor drives the shaft to drive the gear and the gear ring to rotate, and then drives the water stirring frame and the air stirring frame to perform circular stirring. Through the cooperation of the electromagnetic plate and the threaded rod, the air stirring frame moves up and down on the threaded rod, driving the water stirring frame to move up and down synchronously to achieve up and down stirring, which can make the flue gas fully contact with water, improve the heat exchange effect, avoid local water temperature being too high or too low, and ensure uniform heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 It is a schematic diagram of a cross-sectional three-dimensional structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the smoke detection mechanism of the present invention;

[0021] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the threaded rod of the present invention;

[0022] Figure 6 It is a partial three-dimensional structural schematic diagram of the present invention;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the air stirring frame of the present invention.

[0024] 1. Waste heat recovery cylinder; 2. Heat conducting layer; 3. Self-adaptive regulating mechanism; 31. Water stirring frame; 311a. First rotating ring; 312a. First connecting block; 313a. Second moving groove; 314a. Second moving block; 315a. Second rotating ring; 32. Air stirring frame; 321a. Second connecting block; 322a. Lifting plate; 323. Third rotating ring; 33. Support seat; 34. First supporting plate; 35. Motor; 36. Rotating shaft; 37. Sliding groove; 38. Sliding block; 39. Gear; 310. First moving groove; 311b. First moving block; 312b. Gear ring; 313b. Annular rotating groove; 314b. Rotating head; 315b. Connecting plate; 316. Threaded rod; 317. Threaded sleeve; 318. Jack; 319. Round hole; 320. Electromagnetic plate; 321b, plastic spring; 322b, magnetic plug; 4, smoke detection mechanism; 41, extrusion plate; 42, detection spring; 43, air outlet; 44, detection tube; 45, vertical block; 46, connecting rod; 47, detection rod; 48, wind wheel; 49, N-shaped magnetic plate; 410, S-class magnetic plate; 411, conductive rod; 5, smoke and water supplement transmission mechanism; 51, second support plate; 52, air pump; 53, third support plate; 54, air pump; 55, connecting pipe; 56, gas collecting pipe; 57, fourth support plate; 58, transmission pump; 59, water pump; 510, gas space; 511, water storage space; 512, partition plate; 513, first air cavity; 514, second air cavity; 515, third air cavity; 516, first water cavity; 517, second water cavity; 518, third water cavity. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention will be further described below in conjunction with the embodiments.

[0027] Example: Refer to Figures 1 to 7 , a waste heat recovery device for a calcining furnace for preparing zeolite from blast furnace slag, comprising: A waste heat recovery cylinder 1, wherein a heat conducting layer 2 is disposed inside the waste heat recovery cylinder 1, and the heat conducting layer 2 divides the waste heat recovery cylinder 1 from the inside to the outside into a gas space 510 and a water storage space 511, and the waste heat recovery cylinder 1 is provided with a plurality of partition plates 512 from top to bottom, and the partition plates 512 divide the gas space 510 and the water storage space 511 from top to bottom into a first air cavity 513, a second air cavity 514, a third air cavity 515, a first water cavity 516, a second water cavity 517, and a third water cavity 518, respectively, and every two air cavities and water cavities at the same horizontal level from top to bottom form a primary waste heat recovery space, a secondary waste heat recovery space, and a tertiary waste heat recovery space, respectively; The adaptive adjustment mechanism 3 includes a water stirring frame 31 and an air stirring frame 32 for stirring water and smoke, and the water stirring frame 31 and the air stirring frame 32 stir in a circle and flip up and down; The adaptive adjustment mechanism 3 includes a support seat 33 fixedly connected to the bottom end of the waste heat recovery cylinder 1, and a plurality of first support plates 34 arranged in a linear array are fixedly connected to the outer wall of the waste heat recovery cylinder 1. The three-level waste heat recovery space corresponds to the support seat 33 and the first support plate 34, and the second-level waste heat recovery space and the third-level waste heat recovery space correspond to each two first support plates 34 from bottom to top. The support seat 33 and the top of the first support plate 34 are fixedly connected to a motor 35, and the output end of the motor 35 is fixedly connected to a rotating shaft 36, and the other end of each rotating shaft 36 is rotatably connected to the bottom end of the first support plate 34 above itself.

[0028] The outer wall of the rotating shaft 36 is provided with a sliding groove 37, the inner wall of the sliding groove 37 is fixedly connected with a slider 38, the outer wall of the slider 38 is fixedly connected with a gear 39, and the gear 39 is slidably connected to the outer wall of the rotating shaft 36, and the outer wall of the waste heat recovery cylinder 1 is provided with a plurality of first moving grooves 310 arranged in an upper and lower array, the inner wall of the first moving groove 310 is slidably connected with a first moving block 311b, and the outer wall of the first moving block 311b is rotatably connected with a plurality of gear rings 312b, the gear rings 312b are meshed with the gear 39, and the gear rings 312b are meshed with the gears 39. An annular groove 313b is provided at the bottom end of 39, and a swivel head 314b is rotatably connected to the inner wall of the annular groove 313b, and a connecting plate 315b is rotatably connected to the bottom end of the swivel head 314b. The swivel head 314b will not fall off in the annular groove 313b. The top or bottom of the swivel head 314b may be designed with a boss, a retaining ring or a retaining ring. These structures cooperate with the upper and lower end surfaces of the annular groove 313b to limit the axial movement range of the swivel head 314b, so that it can only rotate in the annular groove 313b without falling off.

[0029] The water stirring frame 31 includes a first rotating ring 311a in contact with the inner wall of the waste heat recovery cylinder 1, and the outer peripheral wall of the first rotating ring 311a and the inner peripheral wall of the gear ring 312b are both embedded with a first permanent magnet ring, and the two first permanent magnet rings are magnetically attracted to each other, and the outer peripheral wall of the heat conductive layer 2 is provided with a plurality of second movable grooves 313a corresponding to the first movable grooves 310, and the inner wall of the second movable groove 313a is slidably connected to the second movable block 314a, and the outer wall of the second movable block 314a is rotatably connected to the second rotating ring 315a, and a plurality of first connecting blocks 312a arranged in a circular array are fixedly connected between the second rotating ring 315a and the first rotating ring 311a.

[0030] The first air cavity 513, the second air cavity 514, and the third air cavity 515 are all vertically rotatably connected with a threaded rod 316, and the outer wall of the threaded rod 316 is threadedly sleeved with a threaded sleeve 317, and the air stirring frame 32 includes a second connecting block 321a arranged in a circumferential array on the outer peripheral wall of the threaded sleeve 317, and the bottom end of the second connecting block 321a is fixedly connected to a lifting plate 322a, and the other end of the second connecting block 321a is jointly fixedly connected to a third rotating ring 323, and the outer peripheral wall of the third rotating ring 323 and the inner peripheral wall of the second rotating ring 315a are both embedded with a second permanent magnetic ring that is magnetically attracted to each other; A plug hole 318 is provided at the top of the partition plate 512, a round hole 319 is provided at the bottom end of the threaded rod 316, an electromagnetic plate 320 is fixedly connected to the inner top wall of the round hole 319, a plastic spring 321b is fixedly connected to the bottom end of the electromagnetic plate 320, a magnetic plug block 322b is fixedly connected to the other end of the plastic spring 321b, the magnetic plug block 322b is magnetically repelled from the electromagnetic plate 320, and the magnetic plug block 322b is intermittently plugged into the round hole 319.

[0031] The smoke detection mechanism 4 is used to detect the smoke volume and temperature during each primary treatment; The smoke detection mechanism 4 includes an extrusion plate 41 which is slidably connected to the inner walls of the first air cavity 513, the second air cavity 514, and the third air cavity 515 respectively, and the inner peripheral wall of the extrusion plate 41 is fixedly connected with a threaded ring of a threaded sleeve 317 arranged on the outer wall of the threaded rod 316 (through the threaded ring, when the extrusion plate moves upward, the threaded ring and the outer wall of the threaded rod 316 can move threadedly, and the threaded ring rotates in the extrusion plate, so the extrusion plate 41 can move upward normally, and the above three are all airtightly connected to prevent smoke from being discharged), the inner top walls of the first air cavity 513, the second air cavity 514, and the third air cavity 515 are all fixedly connected with a detection spring 42 on the top of the extrusion plate 41, the inner top wall of the waste heat recovery cylinder 1 is provided with an air outlet 43, and the top of the waste heat recovery cylinder 1 is fixedly connected with a detection tube 44, and the detection tube A vertical block 45 is fixedly connected to the top of 44, a connecting rod 46 is fixedly connected between the two vertical blocks 45, a detection rod 47 is rotatably connected to the bottom end of the connecting rod 46, a wind wheel 48 is fixedly connected to the bottom end of the detection rod 47, an N-shaped magnetic plate 49 and an S-class magnetic plate 410 are fixedly arranged on the inner wall of one of the vertical blocks 45, a conductive rod 411 is fixedly connected to the outer wall of the detection rod 47, and the conductive rod 411 is located between the horizontal planes of the N-shaped magnetic plate 49 and the S-class magnetic plate 410, temperature detectors are arranged inside the first air cavity 513, the second air cavity 514 and the third air cavity 515, the conductive rod 411 is electrically connected to a current detector, the electrical signal of the current detector is connected to a PLC controller, the PLC controller is electrically connected to the motor 35, the electromagnetic plate 320 and the temperature detector to form a control loop.

[0032] The smoke and water supplement transmission mechanism 5 is used to transmit the smoke downward step by step and supplement water according to the smoke detection mechanism 4.

[0033] The flue gas and water supplement transmission mechanism 5 includes two second support plates 51 fixedly connected to the outer wall of the waste heat recovery cylinder 1, and the top of the second support plates 51 is fixedly connected to the air pump 52. The air delivery end of the upper air pump 52 passes through the inner wall of the waste heat recovery cylinder 1 and the heat conductive layer 2 and extends into the first air cavity 513. The air extraction end of the lower air pump 52 passes through the inner wall of the waste heat recovery cylinder 1 and the heat conductive layer 2 and extends into the third air cavity 515. The outer wall of the waste heat recovery cylinder 1 is fixedly connected to a plurality of third support plates 53 arranged up and down, and the top of the third support plates 53 is fixedly connected to an air pump 54. The exhaust ends of the air pumps 54 from top to bottom pass through the inner wall of the waste heat recovery cylinder 1 and extend to the first air cavity 513, the second air cavity 514, and the third air cavity 515 respectively. The output ends of the plurality of air pumps 54 are fixedly connected to a connecting pipe 55, and the other ends of the connecting pipes 55 are fixedly connected to an air collecting pipe 56. The air outlet of the air collecting pipe 56 can be connected to various waste heat utilization devices, such as a heat exchanger and a heat pump.

[0034] The outer wall of the waste heat recovery cylinder 1 is fixedly connected with a plurality of fourth support plates 57 arranged up and down, and the top ends of the two fourth support plates 57 at the upper part are fixedly connected with a transmission pump 58, and the air suction ends of the two transmission pumps 58 from top to bottom are respectively connected with the first air cavity 513 and the second air cavity 514, and the air exhaust ends of the two transmission pumps 58 from top to bottom are respectively connected with the second air cavity 514 and the third air cavity 515; The top ends of the multiple fourth support plates 57 are fixedly connected to the water pumps 59, and the drainage ends of the water pumps 59 from top to bottom are respectively connected to the first water chamber 516, the second water chamber 517, and the third water chamber 518. The PLC controller is electrically connected to the wind pump 52, the air pump 54, the transmission pump 58, and the water pump 59 to form a transmission loop.

[0035] All the above-mentioned magnetic components are made of high-temperature magnetic materials. For example, samarium cobalt magnets are divided into two types: SmCo5 and Sm2Co17. SmCo5 has high remanence and coercivity. The remanence can generally reach 0.9-1.1T, and the coercivity is between 700-900kA / m; the magnetic energy product of Sm2Co17 is higher, up to 200-250kJ / m³, and can maintain good magnetic stability at high temperatures. In the calcining furnace waste heat recovery device for preparing zeolite from blast furnace slag, samarium cobalt magnets can ensure that the various magnetic components (such as the first permanent magnet ring, the second permanent magnet ring, the electromagnetic plate 320, etc.) work normally in a high temperature environment of 1100°C, maintaining the adaptive adjustment function and heat exchange efficiency of the device.

[0036] The working principle of the present invention is as follows: First, the flue gas generated by the calcining furnace is discharged into the first air cavity 513 through the air pump 52 located above, and then the clean water introduced into the first water cavity 516 is controlled according to the temperature and amount of the flue gas, and then the motor 35 is started, and the rotating shaft 36 is driven to rotate by the motor 35, thereby driving the gear 39 to rotate, and the gear ring 312b is driven to rotate by the gear 39. Since the outer peripheral wall of the first rotating ring 311a and the inner peripheral wall of the gear ring 312b are both embedded with the first permanent magnetic ring, and the two first permanent magnetic rings are magnetically attracted to each other, the first rotating ring 311a drives the gear ring 312b to rotate synchronously, thereby driving the water stirring frame 31 to rotate, and the clean water is stirred by the water stirring frame 31. Since the outer peripheral wall of the third rotating ring 323 and the inner peripheral wall of the second rotating ring 315a are both embedded with the second permanent magnetic ring that is magnetically attracted to each other, the air stirring frame 32 is driven to stir the flue gas in a circular manner; When the flue gas is stirred in a circular motion, the electromagnetic plate 320 is energized at a fixed time through the PLC controller and the motor 35 is controlled to reverse at a fixed time (the timing time of the electromagnetic plate 320 is the time when the gas stirring frame 32 moves from the bottom end of the threaded rod 316 to the top end of the threaded rod 316 after pre-testing, and the reversal time of the motor 35 is the time when the electromagnetic plate 320 is energized. When the electromagnetic plate 320 is powered off, the motor 35 will not reverse). By energizing the electromagnetic plate 320, the magnetic plug 322b moves downward. As the gas stirring frame 32 drives the threaded rod 316 to rotate, the magnetic plug 322b is gradually inserted into the socket 318. The plug is limited by the socket 318, so that the threaded rod 316 is limited. By the rotation of the gas stirring frame 32 on the outer wall of the threaded rod 316, the gas stirring frame 32 moves up and down (refer to the relationship between the screw and the nut), and then the gas stirring frame 32 and the water stirring frame 31 move up and down synchronously, so as to stir the water and the flue gas up and down, thereby achieving the effect of up and down stirring and circular stirring.

[0037] When the smoke is discharged into the first air cavity 513, the smoke will push the extrusion plate 41 upwards, and the air on the extrusion plate 41 will be discharged through the air outlet 43 through the extrusion plate 41, and the air will be squeezed out through the air outlet 43, and the wind wheel 48 will be driven to rotate by the air. The rotation of the wind wheel 48 can drive the detection rod 47 to rotate, and the rotation of the detection rod 47 can drive the conductive rod 411 to rotate, and then cut the magnetic flux lines between the N-shaped magnetic plate 49 and the S-class magnetic plate 410, so as to generate current (principle of cutting magnetic flux lines), and then the magnitude of the generated current is detected by the current detector (because there is a certain space between the extrusion plate 41 and the inner bottom of the first air cavity 513 in the initial state, but the gas storage capacity of the space is known in advance by testing), and then the electrical signal of the detected current magnitude is transmitted to the PLC controller, and the temperature of the smoke is detected by the temperature detector.

[0038] Then, the amount of water injected into each water cavity is controlled by the smoke volume and smoke temperature, and the stirring speed of the water stirring frame 31 and the air stirring frame 32 is controlled. The details are as follows: In the process of preparing zeolite from blast furnace slag, the operating conditions of the calciner are different, and the flue gas temperature and flue gas volume will vary. Taking the common blast furnace production scale as an example, under normal production load, the flue gas temperature discharged from the calciner is generally between 700-900℃, and the flue gas volume is about 3000-5000 cubic meters / hour. When the blast furnace is in high-load production, such as a 20% increase in ore processing, the flue gas temperature discharged from the calciner may rise to 900-1100℃, and the flue gas volume will increase to 5000-7000 cubic meters / hour accordingly; in the low-load production stage, such as when the equipment is just started after maintenance or when the ore supply is insufficient, the flue gas temperature will drop to 500-700℃, and the flue gas volume will also decrease to 1500-3000 cubic meters / hour. These data are based on the monitoring data statistics of the actual blast furnace production process. Different blast furnaces will have fluctuating data due to differences in equipment and production processes.

[0039] When the flue gas volume is large and the temperature is low, a larger amount of water is required. Because the flue gas volume is large, the total heat is still high despite the low temperature, and sufficient water is needed to absorb the heat. According to the heat exchange principle and actual tests, the amount of water injected into each water cavity can be initially set to 10-12 cubic meters per hour, and each water cavity is evenly distributed. For the stirring speed of the water stirring rack 31, the speed of the motor 35 can be set to 1200-1400 rpm. By increasing the fluidity of the water, the heat transfer efficiency is improved to avoid the local water temperature being too low and affecting the overall recovery effect. The air stirring rack 32 maintains the stirring speed of the flue gas at a normal level, and the motor 35 drives its speed to 1000-1200 rpm to ensure that the flue gas is in full contact with the water; When the flue gas volume is large and the temperature is high, a larger amount of water is required. Because the flue gas volume is large and the temperature is high, the total heat is high, and more water is needed to absorb the heat. Therefore, the amount of water injected into the corresponding water cavity can be increased to 15-18 cubic meters per hour according to the position of the specific air cavity. In order to ensure that the high-temperature flue gas is fully in contact with the water and quickly transfers heat, the stirring speed of the water stirring rack 31 and the air stirring rack 32 should be increased. The motor 35 drives the water stirring rack 31 to increase its speed to 1400-1600 rpm, and the speed of the air stirring rack 32 is also increased to 1200-1400 rpm; When the flue gas volume is small and the temperature is low, a smaller amount of water is required. Because the flue gas volume is small and the temperature is low, the total heat is low, and too much water will cause the water temperature to rise insignificantly. Therefore, the amount of water injected into the corresponding water cavity can be reduced to 3-5 cubic meters per hour according to the position of the specific air cavity. To avoid excessive dilution, the stirring speed of the flue gas by the air stirring rack 32 should be reduced, and the motor 35 drives its speed to 600-800 rpm. The stirring speed of the water stirring rack 31 is also reduced accordingly, and the motor 35 drives its speed to 800-1000 rpm to maintain appropriate heat transfer; When the flue gas volume is small and the temperature is high, a normal amount of water is required. When the flue gas volume is small but the temperature is high and the total heat is moderate, too much or too little water will affect the efficiency. The amount of water injected into the corresponding water cavity according to the position of the specific air cavity can be controlled at 6-8 cubic meters per hour. The stirring speeds of the air stirring rack 32 and the water stirring rack 31 are kept at normal speeds. The motor 35 drives the air stirring rack 32 at a speed of 1000-1200 rpm and drives the water stirring rack 31 at a speed of 1200-1400 rpm to ensure that the high-temperature flue gas is fully in contact with the water and balance the heat transfer and energy consumption.

[0040] The process of discharging clean water into the first water chamber 516, the second water chamber 517, and the third water chamber 518 is as follows: the water pump 59 is controlled by the PLC controller to start, and water is respectively injected into the first water chamber 516, the second water chamber 517, and the third water chamber 518 through the water pump 59. After the flue gas volume detected in the first air chamber 513 is injected for the first time, the flue gas volume in the subsequent second air chamber 514 and the third air chamber 515 is consistent. It is only necessary to detect the flue gas temperature and control the water injection volume into the second water chamber 517 and the third water chamber 518 according to the flue gas temperature. The waste heat recovery time in each chamber is 10 minutes (every 10 minutes is the time that the flue gas volume discharged by the calcining furnace has the highest temperature and can be processed within 30 minutes after pre-testing); After the flue gas is treated in the second air cavity 514 for 10 minutes, the flue gas in the third air cavity 515 is extracted through the air pump 52 and discharged into the flue gas treatment device, and then the flue gas in the second air cavity 514 is discharged into the third air cavity 515 through the transmission pump 58, the first air cavity 513 is discharged into the second air cavity 514, and the untreated flue gas is discharged into the first air cavity 513, so as to continuously recover the waste heat.

[0041] The flue gas heats the water, which generates water vapor. The water vapor in the first water chamber 516, the second water chamber 517, and the third water chamber 518 is extracted by multiple air pumps 54, and then discharged through the gas collecting pipe 56 to recycle the waste heat. Each time the flue gas enters a new air cavity, the water in the water cavity is extracted and then new water is discharged again. The reason for this is to ensure that the amount of water discharged into the water cavity is accurate each time.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waste heat recovery device for a calcining furnace for preparing zeolite from blast furnace slag, characterized in that: include: A waste heat recovery cylinder (1), wherein a heat conducting layer (2) is arranged inside the waste heat recovery cylinder (1), and the heat conducting layer (2) divides the waste heat recovery cylinder (1) from the inside to the outside into a gas space (510) and a water storage space (511), and the waste heat recovery cylinder (1) is provided with a plurality of partition plates (512) from top to bottom, and the partition plates (512) divide the gas space (510) and the water storage space (511) from top to bottom into a first air cavity (513), a second air cavity (514), a third air cavity (515), a first water cavity (516), a second water cavity (517), and a third water cavity (518), respectively, and every two air cavities and water cavities at the same horizontal level from top to bottom respectively form a primary waste heat recovery space, a secondary waste heat recovery space, and a tertiary waste heat recovery space; An adaptive adjustment mechanism (3), the adaptive adjustment mechanism (3) comprising a water stirring frame (31) and an air stirring frame (32) for stirring water and smoke, wherein the water stirring frame (31) and the air stirring frame (32) stir in a circular manner and flip up and down; A smoke detection mechanism (4), the smoke detection mechanism (4) being used to detect the amount and temperature of smoke during each primary treatment; A smoke and water supplementary transmission mechanism (5), wherein the smoke and water supplementary transmission mechanism (5) is used to transmit smoke downward step by step and to supplement water according to the smoke detection mechanism (4).

2. The calcining furnace waste heat recovery device for preparing zeolite from blast furnace slag according to claim 1, characterized in that: The adaptive adjustment mechanism (3) comprises a support seat (33) fixedly connected to the bottom end of the waste heat recovery cylinder (1); a plurality of first support plates (34) arranged in a linear array are fixedly connected to the outer wall of the waste heat recovery cylinder (1); a third-level waste heat recovery space corresponds to between the support seat (33) and the first support plate (34); a second-level waste heat recovery space and a third-level waste heat recovery space correspond to between each two first support plates (34) from bottom to top; a motor (35) is fixedly connected to the top end of the support seat (33) and the first support plate (34); an output end of the motor (35) is fixedly connected to a rotating shaft (36); and the other end of each rotating shaft (36) is rotatably connected to the bottom end of the first support plate (34) above the motor.

3. The calcining furnace waste heat recovery device for preparing zeolite from blast furnace slag according to claim 2, characterized in that: The outer wall of the rotating shaft (36) is provided with a sliding groove (37), the inner wall of the sliding groove (37) is fixedly connected with a slider (38), the outer wall of the slider (38) is fixedly connected with a gear (39), and the gear (39) is slidably connected to the outer wall of the rotating shaft (36), the outer wall of the waste heat recovery cylinder (1) is provided with a plurality of first movable grooves (310) arranged in an upper and lower array, the inner wall of the first movable groove (310) is slidably connected with a first movable block (311b), the outer wall of the first movable block (311b) is rotatably connected with a plurality of toothed rings (312b), the toothed rings (312b) are meshed with the gear (39), the bottom ends of the toothed rings (312b) and the gear (39) are provided with an annular rotating groove (313b), the inner wall of the annular rotating groove (313b) is rotatably connected with a rotating head (314b), and the bottom end of the rotating head (314b) is rotatably connected with a connecting plate (315b).

4. The calcining furnace waste heat recovery device for preparing zeolite from blast furnace slag according to claim 3, characterized in that: The water stirring frame (31) comprises a first rotating ring (311a) in contact with the inner wall of the waste heat recovery cylinder (1), and the outer peripheral wall of the first rotating ring (311a) and the inner peripheral wall of the gear ring (312b) are both embedded with first permanent magnetic rings, and the two first permanent magnetic rings are magnetically attracted to each other, the outer peripheral wall of the heat conductive layer (2) is provided with a plurality of second movable grooves (313a) corresponding to the first movable grooves (310), the inner wall of the second movable groove (313a) is slidably connected to a second movable block (314a), the outer wall of the second movable block (314a) is rotatably connected to a second rotating ring (315a), and a plurality of first connecting blocks (312a) arranged in a circumferential array are fixedly connected between the second rotating ring (315a) and the first rotating ring (311a).

5. The calcining furnace waste heat recovery device for preparing zeolite from blast furnace slag according to claim 4, characterized in that: The first air cavity (513), the second air cavity (514), and the third air cavity (515) are all vertically rotatably connected with a threaded rod (316); the outer wall of the threaded rod (316) is threadedly sleeved with a threaded sleeve (317); the air stirring frame (32) comprises a second connecting block (321a) arranged in a circular array on the outer peripheral wall of the threaded sleeve (317); the bottom end of the second connecting block (321a) is fixedly connected with a lifting plate (322a); the other end of the second connecting block (321a) is jointly fixedly connected with a third rotating ring (323); the outer peripheral wall of the third rotating ring (323) and the inner peripheral wall of the second rotating ring (315a) are both embedded with a second permanent magnetic ring that is magnetically attracted to each other; The top end of each of the partition plates (512) is provided with an insertion hole (318); the bottom end of the threaded rod (316) is provided with a circular hole (319); the inner top wall of the circular hole (319) is fixedly connected to an electromagnetic plate (320); the bottom end of the electromagnetic plate (320) is fixedly connected to a plastic spring (321b); the other end of the plastic spring (321b) is fixedly connected to a magnetic plug-in block (322b); the magnetic plug-in block (322b) and the electromagnetic plate (320) are magnetically repelled from each other, and the magnetic plug-in block (322b) is intermittently plugged into the circular hole (319).

6. The calcining furnace waste heat recovery device for preparing zeolite from blast furnace slag according to claim 1, characterized in that: The smoke detection mechanism (4) comprises an extrusion plate (41) slidably connected to the inner walls of the first air cavity (513), the second air cavity (514), and the third air cavity (515), respectively, and the inner peripheral wall of the extrusion plate (41) is fixedly connected to a threaded ring of a threaded sleeve (317) arranged on the outer wall of a threaded rod (316), the inner top walls of the first air cavity (513), the second air cavity (514), and the third air cavity (515) are all fixedly connected to a detection spring (42) together with the top end of the extrusion plate (41), the inner top wall of the waste heat recovery cylinder (1) is provided with an air outlet (43), the top end of the waste heat recovery cylinder (1) is fixedly connected to a detection tube (44), the top end of the detection tube (44) is fixedly connected to a vertical block (45), a connecting rod (46) is fixedly connected between the two vertical blocks (45), and the connecting rod (46) is fixedly connected between the two vertical blocks (45). 6) is rotatably connected to a detection rod (47), the bottom end of the detection rod (47) is fixedly connected to a wind wheel (48), the inner wall of one of the vertical blocks (45) is fixedly provided with an N-shaped magnetic plate (49) and an S-class magnetic plate (410) above and below, the outer wall of the detection rod (47) is fixedly connected to a conductive rod (411), and the conductive rod (411) is located between the horizontal planes of the N-shaped magnetic plate (49) and the S-class magnetic plate (410), the first air cavity (513), the second air cavity (514), and the third air cavity (515) are all provided with temperature detectors, the conductive rod (411) is electrically connected to a current detector, the current detector is electrically connected to a PLC controller, the PLC controller is electrically connected to the motor (35), the electromagnetic plate (320), and the temperature detector to form a control loop.

7. The device for recovering waste heat from a calcining furnace for preparing zeolite from blast furnace slag according to claim 6, characterized in that: The flue gas and water supplementary transmission mechanism (5) comprises two second support plates (51) arranged vertically and fixedly connected to the outer wall of the waste heat recovery cylinder (1), the top of each of the second support plates (51) being fixedly connected to an air pump (52), the air delivery end of the air pump (52) located at the top passing through the inner wall of the waste heat recovery cylinder (1), the heat conductive layer (2) and extending into the first air cavity (513), and the air extraction end of the air pump (52) located at the bottom passing through the inner wall of the waste heat recovery cylinder (1), the heat conductive layer (2) and extending into the third air cavity (515); The outer wall of the waste heat recovery cylinder (1) is fixedly connected to a plurality of third support plates (53) arranged up and down, and the top ends of the third support plates (53) are fixedly connected to air pumps (54). From top to bottom, the air exhaust ends of the air pumps (54) pass through the inner wall of the waste heat recovery cylinder (1) and extend to the first air cavity (513), the second air cavity (514), and the third air cavity (515), respectively. The output ends of the plurality of air pumps (54) are fixedly connected to connecting pipes (55), and the other ends of the connecting pipes (55) are commonly fixedly connected to an air collecting pipe (56).

8. The device for recovering waste heat from a calcining furnace for preparing zeolite from blast furnace slag according to claim 7, characterized in that: The outer wall of the waste heat recovery cylinder (1) is fixedly connected to a plurality of fourth support plates (57) arranged in an upper and lower manner, and the top ends of the two fourth support plates (57) at the upper portion are fixedly connected to a transmission pump (58), and the air suction ends of the two transmission pumps (58) from the upper portion are respectively connected to the first air cavity (513) and the second air cavity (514), and the air discharge ends of the two transmission pumps (58) from the upper portion are respectively connected to the second air cavity (514) and the third air cavity (515); The top ends of the plurality of fourth support plates (57) are all fixedly connected to a water pump (59); the drainage ends of the water pumps (59) are respectively connected to the first water chamber (516), the second water chamber (517), and the third water chamber (518) from top to bottom; and the PLC controller is electrically connected to the air pump (52), the air pump (54), the transmission pump (58), and the water pump (59) to form a transmission loop.

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