CN111998683A

CN111998683A - Kiln waste heat recycling device and waste heat recycling method

Info

Publication number: CN111998683A
Application number: CN202010765101.3A
Authority: CN
Inventors: 李钦生
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2020-11-27

Abstract

The invention discloses a kiln waste heat recycling device which comprises a shell, wherein a supporting seat is assembled at the bottom end of an inner cavity of the shell, dust storage boxes are assembled on two sides and the center of the inner cavity of the supporting seat, the front side of each dust storage box penetrates through the shell and is provided with a handle, an inlet pipe is assembled on the left side face of the shell and is positioned at the top end of the supporting seat, a first motor is assembled on the left side of each dust storage box, and the first motor is positioned at the upper end of the inlet pipe. The waste heat utilization mechanism I can preheat the coal briquettes or coal dust in the conveying process and intermittently convey the coal briquettes or coal dust, so that the supply of kiln fuel is guaranteed, the coal briquettes or coal dust are more fully combusted, the heat exchange performance is improved, the temperature of the discharged flue gas can be reduced through the waste heat utilization mechanism II, the heat of the flue gas can be utilized, and the purpose of providing water for platform production and life can be achieved.

Description

Kiln waste heat recycling device and waste heat recycling method

Technical Field

The invention relates to the technical field of kiln waste heat recycling, in particular to a kiln waste heat recycling device and a kiln waste heat recycling method.

Background

The industrial kiln is a device which provides heat through burning fuel to enable a product to finish coupling processing of a certain temperature curve, an atmosphere curve and a pressure curve, along with the development of production technology, although the heat utilization efficiency of the process kiln is improved, when the kiln burns to supply heat to the product, only about one third of heat energy emitted by burning fuel is effectively utilized to be supplied to the product, and the rest heat energy is directly discharged outdoors through the heat dissipation of the kiln, the smoke discharge section at the head of the kiln and the tail of the kiln, so that the heat efficiency is very low, and a large amount of energy is wasted;

at present, in the field of kiln production, tail gas in industrial kiln production is taken out and heat is exchanged to realize heat energy recycling, but the currently adopted kiln waste heat energy utilization has low heat energy recovery efficiency and low utilization rate, is not reasonably utilized, and causes energy waste.

Disclosure of Invention

The invention aims to provide a kiln waste heat recycling device and a kiln waste heat recycling method, and solves the problem that energy is wasted because kiln waste heat recycling proposed in the prior art is not reasonably utilized.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a kiln waste heat recycling device, includes the shell, the inner chamber bottom of shell is equipped with the supporting seat, the inner chamber both sides and the central point of supporting seat put and all are equipped with the dust bin, the front side of dust bin runs through the shell and is equipped with the handle, the left surface of shell is equipped with the admission pipe, and the admission pipe is located the top of supporting seat, the left side of dust bin is equipped with motor one, motor one is located the upper end of admission pipe, the output of motor one runs through the shell and is equipped with the lead screw, the screw thread opposite direction of lead screw central point puts both sides sets up, the outer wall both sides of lead screw all threaded connection has the slider, the bottom of slider is equipped with the scraper blade, the bottom of scraper blade contacts with the upper surface of supporting seat, the top central point of slider is equipped with the slider, the, the inner chamber of shell is equipped with the filter screen, the lower surface of filter screen contacts with the brush, the lower surface central point of filter screen puts and follows left right direction and be equipped with slider assorted guide rail, the upper end of filter screen is equipped with the active carbon filter screen, the top of shell is equipped with the heat output tube, the top of shell is equipped with waste heat utilization mechanism two, and waste heat utilization mechanism two is located the left side of heat output tube.

Preferably, the right flank of shell is equipped with the outer container, the right side of lead screw is run through the shell and is extended into and be equipped with conical gear one in the outer container, the bottom meshing of conical gear one is connected with conical gear two, the bottom of conical gear two is equipped with the pivot, the bottom of pivot is passed through the inner wall connection of bearing and outer container, interference fit has gear one on the outer wall of pivot, the outer container is extended to the side of gear one, the side of outer container is equipped with waste heat utilization mechanism one.

Preferably, the first waste heat utilization mechanism comprises a coal storage box, a disc, a baffle, a second motor, a spiral conveying shaft, a conveying box, an outer cover, an air conveying pipe, a second fan, a first feed opening, teeth and a second feed opening;

the inner chamber bottom of storing up the coal bin is equipped with the disc, feed opening one has been seted up to the upper surface of disc, the bottom of disc is equipped with the baffle through the bearing, the side of baffle extends and stores up the coal bin, the outer wall circumference of baffle is equipped with the tooth with gear one engaged with, feed opening two has been seted up to the upper surface of baffle, the bottom of storing up the coal bin is equipped with carries the case, the right side of carrying the case is connected with advancing the coal mouth of cellar for storing things stove, the left side of carrying the case is equipped with motor two, the output of motor two runs through and stores up the coal bin and is equipped with the auger delivery axle, the top of carrying the case is equipped with the dustcoat, the top of dustcoat is equipped with fan two, the output of fan two runs through the dust.

Preferably, the first waste heat utilization mechanism further comprises a buffer plate and a spring;

the buffer board is assembled on the right side wall surface of the coal storage box through a pin shaft, one end of a spring is assembled at the bottom end of the buffer board, and the other end of the spring is connected with the outer wall of the conveying box.

Preferably, the waste heat utilization mechanism II comprises a box body, a drain pipe, a water inlet pipe, a water tank and a fan I;

the top of box is equipped with fan one, the output of fan one runs through the box, the inner chamber of box is more assembled with a plurality of water tank by mistake, the water tank is trapezoidal, both ends are equipped with inlet tube and drain pipe respectively about the side of water tank.

A waste heat recovery method of a kiln waste heat recovery and utilization device comprises the following steps;

selecting a first waste heat utilization mechanism or a second waste heat utilization mechanism according to needs, and connecting a heat output pipe with a second fan or the first fan;

step (2), discharging the heat output by the kiln through a pipeline, connecting the heat with an inlet pipe and conveying the heat to an inner cavity of the shell, preliminarily filtering dust and impurities in the flue gas through a filter screen, and filtering harmful gas impurities in the flue gas through an active carbon filter screen;

step (3), starting the first motor to drive the screw rod to rotate forwards and backwards, driving the brush to move at the bottom end of the filter screen by the sliding block to clean the filter screen to avoid blockage, and driving the scraper to move on the upper surface of the supporting seat to clean dust and impurities into the dust storage box for storage;

step (4), selecting a first waste heat utilization mechanism, filtering the flue gas, and then feeding the filtered flue gas into the first waste heat utilization mechanism, so that the flue gas can be preheated while being conveyed, and the heat exchange performance is improved;

and (5) selecting a second waste heat utilization mechanism, filtering the flue gas, and then feeding the filtered flue gas into the second waste heat utilization mechanism, so that the water stored in the water tank can be heated, the temperature of the flue gas can be reduced, the flue gas is discharged, and the influence on the environment is avoided.

Preferably, in the step (4), the specific operation step of selecting the first waste heat utilization mechanism is as follows: the coal storage box can store coal blocks or coal dust, the heat output pipe is connected with the input end of the second fan through a pipeline, when the first motor drives the screw rod to rotate, the first bevel gear drives the second bevel gear to rotate, and the rotating shaft drives the first gear to rotate, because the first gear is meshed with the teeth, the baffle plate is driven to rotate at the bottom end of the disc, when the second feed opening is superposed with the first feed opening, the coal blocks or coal dust fall into the conveying box, when the positions of the second feeding opening and the first feeding opening are staggered, the coal blocks or the coal dust can be intermittently fed by being blocked by the baffle plate, the spiral conveying shaft is driven by the second motor to rotate to convey the coal blocks or the coal dust, meanwhile, the filtered flue gas is conveyed into the air conveying pipe through the second fan and conveyed into the conveying box to preheat coal briquettes or coal dust, and the preheated coal briquettes or coal dust enter the kiln.

Preferably, in the step (5), the specific operation step of selecting the first waste heat utilization mechanism is as follows: the heat output pipe is connected with the input end of the first fan through a pipeline, water is injected into the water tank through the water inlet pipe, filtered smoke is conveyed into the box body through the first fan, the smoke moves along with the serpentine channel formed by the plurality of water tanks, the water in the water tank is heated, the temperature of the smoke is reduced, and the smoke is discharged through an opening on the side face of the box body.

The invention provides a kiln waste heat recycling device and a kiln waste heat recycling method, which have the beneficial effects that:

1. the invention can filter the smoke impurities and toxic gases of the kiln, and avoids the influence of a large amount of impurity dust and toxic gases contained in the smoke on the environment and the pollution on subsequent equipment;

2. according to the invention, the waste heat utilization mechanism I can not only preheat the coal briquettes or coal dust in the conveying process, but also intermittently convey the coal briquettes or coal dust, so that the supply of kiln fuel is ensured, the coal briquettes or coal dust are more fully combusted, and the heat exchange performance is improved;

3. the waste heat utilization mechanism II can reduce the temperature of the discharged flue gas, not only can reduce the temperature of the flue gas and avoid the influence on the environment, but also can utilize the heat of the flue gas and can provide water for the production and the life of the platform.

Drawings

FIG. 1 is a schematic structural diagram of a kiln waste heat recovery device according to the present invention;

FIG. 2 is a schematic structural diagram of a sliding block of the kiln waste heat recycling device;

FIG. 3 is a schematic structural diagram of a waste heat utilization mechanism II of the kiln waste heat recovery and utilization device of the present invention;

FIG. 4 is a schematic structural diagram of a waste heat utilization mechanism of the kiln waste heat recovery and utilization device according to the present invention;

fig. 5 is a schematic structural diagram of a baffle plate of the kiln waste heat recycling device.

In the figure: 1. the coal storage device comprises a shell, 2, a first waste heat utilization mechanism, 21, a coal storage box, 22, a disc, 23, a baffle, 24, a buffer plate, 25, a second motor, 26, a spiral conveying shaft, 27, a conveying box, 28, a housing, 29, an air conveying pipe, 30, a second fan, 31, a spring, 32, a first feed opening, 33, teeth, 34, a second feed opening, 3, a sliding block, 4, a second waste heat utilization mechanism, 41, a box body, 42, a water discharging pipe, 43, a water inlet pipe, 44, a water tank, 45, a first fan, 5, an activated carbon filtering net, 6, a heat output pipe, 7, a screw rod, 8, a filtering net, 9, a first motor, 10, an inlet pipe, 11, a scraping plate, 12, a supporting seat, 13, a dust storage box, 14, a first conical gear, 15, a second conical gear, 16, an outer box, 17, a first gear, 18, a rotating shaft, 19, a brush, 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a kiln waste heat recycling device comprises a shell 1, a supporting seat 12 is assembled at the bottom end of an inner cavity of the shell 1, dust storage boxes 13 are assembled on two sides of the inner cavity and at the central position of the supporting seat 12, a front side of each dust storage box 13 penetrates through the shell 1 and is assembled with a handle, the dust storage boxes 13 can be pulled out from the supporting seat 12 through the handles to be cleaned, an inlet pipe 10 is assembled on the left side face of the shell 1, flue gas exhausted by a kiln enters the shell 1 through the inlet pipe 10, the inlet pipe 10 is positioned at the top end of the supporting seat 12, a motor 9 is assembled on the left side of each dust storage box 13, the motor 9 is positioned at the upper end of the inlet pipe 10, a lead screw 7 is assembled at the output end of the motor 9, the thread directions of two sides of the central position of the lead screw 7 are opposite, sliding blocks 3 are in threaded connection with two sides of the outer wall of the lead, the bottom end of the sliding block 3 is provided with a scraping plate 11, the scraping plate 11 can clean dust on the upper surface of the supporting seat 12, the bottom end of the scraping plate 11 is contacted with the upper surface of the supporting seat 12, the central position of the top end of the sliding block 3 is provided with a sliding block 20, the front side and the rear side of the sliding block 20 are provided with brushes 19, can clear up the dust on filter screen 8 surface through brush 19 and avoid blockking up, the inner chamber of shell 1 is equipped with filter screen 8, filter screen 8's lower surface contacts with brush 19, filter screen 8's lower surface central point puts and is equipped with along left right direction with slider 3 assorted guide rail 40, slider 3 can remove in guide rail 40, filter screen 8's upper end is equipped with activated carbon filter screen 5, activated carbon filter screen 5 can filter toxic gas impurity, shell 1's top is equipped with heat output tube 6, shell 1's top is equipped with waste heat utilization mechanism two 4, and waste heat utilization mechanism two 4 is located heat output tube 6's left side.

More specifically, the right flank of shell 1 is equipped with outer container 16, the right side of lead screw 7 runs through shell 1 and extends into and is equipped with conical gear 14 in the outer container 16, the bottom meshing of conical gear 14 is connected with conical gear two 15, conical gear 14 can make conical gear two 15 rotate when rotating, thereby make pivot 18 drive gear 17 rotate, conical gear two 15's bottom is equipped with pivot 18, the bottom of pivot 18 is passed through the bearing and is connected with the inner wall of outer container 16, interference fit has gear 17 on the outer wall of pivot 18, the side of gear 17 extends outer container 16, the side of outer container 16 is equipped with waste heat utilization mechanism 2.

More specifically, the waste heat utilization mechanism I2 comprises a coal storage box 21, a disc 22, a baffle 23, a motor II 25, a spiral conveying shaft 26, a conveying box 27, an outer cover 28, an air conveying pipe 29, a fan II 30, a feeding port I32, a tooth 33 and a feeding port II 34; store up coal bin 21's inner chamber bottom and be equipped with disc 22, feed opening one 32 has been seted up to disc 22's upper surface, disc 22's bottom is equipped with baffle 23 through the bearing, baffle 23 can be followed self axis direction and rotated, baffle 23's side extends stores up coal bin 21, baffle 23's outer wall circumference is equipped with the tooth 33 with a gear 17 engaged with, feed opening two 34 has been seted up to baffle 23's upper surface, store up coal bin 21's bottom is equipped with transport box 27, transport box 27's right side is connected with the coal feed inlet of cellar for storing things stove, transport box 27's left side is equipped with motor two 25, motor two 25's output runs through to store up coal bin 21 and is equipped with spiral delivery shaft 26, transport box 27's top is equipped with dustcoat 28, the top of dustcoat 28 is equipped with fan two 30, the output of fan two 30 runs through.

Further, the first waste heat utilization mechanism 2 further comprises a buffer plate 24 and a spring 31; buffer board 24 is at the right side wall of coal storage box 21 through the round pin axle assembly, and the bottom of buffer board 24 is equipped with the one end of spring 31, and the other end of spring 31 is connected with the outer wall of delivery box 27, can cushion the impact force of coal cinder, protective apparatus.

More specifically, the second waste heat utilization mechanism 4 comprises a box body 41, a drain pipe 42, a water inlet pipe 43, a water tank 44 and a first fan 45; the top of box 41 is equipped with fan 45, and box 41 is run through to the output of fan 45, and the inner chamber of box 41 is equipped with a plurality of water tank 44 more by mistake, and water tank 44 is trapezoidal, can form snakelike transport space, and the transport time of extension flue gas does benefit to the heating of water tank 44 and the cooling of flue gas, and both ends are equipped with inlet tube 43 and drain pipe 42 respectively about the side of water tank 44.

step (1), selecting a first waste heat utilization mechanism 2 or a second waste heat utilization mechanism 4 as required, and connecting a heat output pipe 6 with a second fan 30 or a first fan 45;

step (2), discharging heat output by the kiln through a pipeline, connecting the heat with an inlet pipe 10 and conveying the heat to an inner cavity of the shell 1, primarily filtering dust and impurities in the flue gas through a filter screen 8, and filtering harmful gas impurities in the flue gas through an active carbon filter screen 5;

step (3), starting the motor I9 to drive the screw rod 7 to rotate forwards and backwards, driving the brush 19 to move at the bottom end of the filter screen 8 by the slide block 3 to clean the filter screen 8 to avoid blockage, and driving the scraper 11 to move on the upper surface of the supporting seat 12 to clean dust and impurities into the dust storage tank 13 for storage;

step (4), selecting a first waste heat utilization mechanism 2, filtering the flue gas, and then feeding the filtered flue gas into the first waste heat utilization mechanism 2 to preheat the coal blocks while conveying the coal blocks, so that the heat exchange performance is improved;

the coal briquette or coal dust can be stored through the coal storage box 21, the heat output pipe 6 is connected with the input end of the fan II 30 through a pipeline, when the screw 7 is driven by the motor I9 to rotate, the bevel gear I14 is driven to rotate by the bevel gear II 15, meanwhile, the gear I17 is driven by the rotating shaft 18 to rotate, as the gear I17 is meshed with the teeth 33, the baffle 23 is driven to rotate at the bottom end of the disc 22, when the positions of the feed opening II 34 and the feed opening I32 are overlapped, the coal briquette or coal dust falls into the conveying box 27, when the positions of the feed opening II 34 and the feed opening I32 are staggered, the coal briquette or coal dust is blocked by the baffle 23 to carry out intermittent feeding, the spiral conveying shaft 26 is driven by the motor II 25 to rotate to convey the coal briquette or coal dust, meanwhile, the filtered flue gas is conveyed into the air conveying pipe 29 through the fan II 30 to convey the conveying box 27 to preheat the, the preheated coal blocks or coal dust enter a kiln;

step (5), selecting a second waste heat utilization mechanism 4, filtering the flue gas, and then feeding the filtered flue gas into the second waste heat utilization mechanism 4, so that the water stored in the water tank 44 can be heated, the temperature of the flue gas can be reduced, and the flue gas is discharged out, so that the environment is prevented from being influenced;

the input with heat output tube 6 through pipeline and fan 45 links together, injects water in to water tank 41 through inlet tube 43, and the flue gas after the filtration passes through fan 45 and carries in box 41, and the flue gas removes along with the serpentine channel that a plurality of water tank 41 formed to water in the water tank 41 heats, and has reduced the temperature of self, discharges away through the opening of 41 sides of box.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a kiln waste heat recovery utilizes device which characterized in that: including shell (1), the inner chamber bottom of shell (1) is equipped with supporting seat (12), the inner chamber both sides and the central point of supporting seat (12) are put and all are equipped with dust bin (13), the front side of dust bin (13) runs through shell (1) and is equipped with the handle, the left surface of shell (1) is equipped with admission pipe (10), and admission pipe (10) are located the top of supporting seat (12), the left side of dust bin (13) is equipped with motor (9), motor (9) are located the upper end of admission pipe (10), the output of motor (9) runs through shell (1) and is equipped with lead screw (7), the opposite direction of screw thread of lead screw (7) central point both sides sets up, the equal threaded connection in outer wall both sides of lead screw (7) has slider (3), the bottom of slider (3) is equipped with scraper blade (11), the bottom of scraper blade (11) contacts with the upper surface of supporting seat (12), the top central point of slider (3) puts and is equipped with slider (20), both sides all are equipped with brush (19) around slider (20), the inner chamber of shell (1) is equipped with filter screen (8), the lower surface and the brush (19) of filter screen (8) contact, the lower surface central point of filter screen (8) puts and is equipped with guide rail (40) with slider (3) assorted along left right direction, the upper end of filter screen (8) is equipped with activated carbon filter screen (5), the top of shell (1) is equipped with heat output tube (6), the top of shell (1) is equipped with waste heat utilization mechanism two (4), and waste heat utilization mechanism two (4) are located the left side of heat output tube (6).

2. The kiln waste heat recycling device according to claim 1, characterized in that: the right flank of shell (1) is equipped with outer container (16), the right side of lead screw (7) is run through shell (1) and is extended into outer container (16) and be equipped with conical gear (14) in, the bottom meshing of conical gear (14) is connected with conical gear two (15), the bottom of conical gear two (15) is equipped with pivot (18), the bottom of pivot (18) is through the interior wall connection of bearing with outer container (16), interference fit has gear (17) on the outer wall of pivot (18), the side of gear (17) extends outer container (16), the side of outer container (16) is equipped with waste heat utilization mechanism (2).

3. The kiln waste heat recycling device according to claim 2, characterized in that: the waste heat utilization mechanism I (2) comprises a coal storage box (21), a disc (22), a baffle plate (23), a motor II (25), a spiral conveying shaft (26), a conveying box (27), an outer cover (28), an air conveying pipe (29), a fan II (30), a feed opening I (32), teeth (33) and a feed opening II (34);

the inner chamber bottom of storing up coal bin (21) is equipped with disc (22), feed opening one (32) have been seted up to the upper surface of disc (22), the bottom of disc (22) is equipped with baffle (23) through the bearing, the side of baffle (23) extends to store up coal bin (21), the outer wall circumference of baffle (23) is equipped with tooth (33) with gear one (17) engaged with, feed opening two (34) have been seted up to the upper surface of baffle (23), the bottom of storing up coal bin (21) is equipped with delivery box (27), the right side of delivery box (27) is connected with the coal feeding mouth of cellar for storage, the left side of delivery box (27) is equipped with motor two (25), the output of motor two (25) runs through coal bin (21) and is equipped with auger delivery axle (26), the top of delivery box (27) is equipped with dustcoat (28), the top of dustcoat (28) is equipped with fan two (30), and the output end of the second fan (30) penetrates through the outer cover (28) and is provided with an air delivery pipe (29).

4. The kiln waste heat recycling device according to claim 3, characterized in that: the waste heat utilization mechanism I (2) further comprises a buffer plate (24) and a spring (31);

the buffer plate (24) is assembled on the right side wall surface of the coal storage box (21) through a pin shaft, one end of a spring (31) is assembled at the bottom end of the buffer plate (24), and the other end of the spring (31) is connected with the outer wall of the conveying box (27).

5. The kiln waste heat recycling device according to claim 1, characterized in that: the waste heat utilization mechanism II (4) comprises a box body (41), a drain pipe (42), a water inlet pipe (43), a water tank (44) and a fan I (45);

the top of box (41) is equipped with fan (45), box (41) are run through to the output of fan (45), the inner chamber of box (41) is more assembled with a plurality of water tank (44) by mistake, water tank (44) are trapezoidally, both ends are equipped with inlet tube (43) and drain pipe (42) respectively about the side of water tank (44).

6. The waste heat recovery method of the kiln waste heat recovery device according to any one of claims 1 to 5, characterized in that: comprises the following steps;

step (1), selecting a first waste heat utilization mechanism (2) or a second waste heat utilization mechanism (4) as required, and connecting a heat output pipe (6) with a second fan (30) or a first fan (45);

step (2), discharging heat output by the kiln through a pipeline, connecting the heat with an inlet pipe (10), conveying the heat to an inner cavity of the shell (1), preliminarily filtering dust and impurities in the flue gas through a filter screen (8), and filtering harmful gas impurities in the flue gas through an active carbon filter screen (5);

step (3), starting a motor I (9) to drive the screw rod (7) to rotate forwards and backwards, driving a brush (19) driven by a sliding block (3) to move at the bottom end of the filter screen (8) to clean the filter screen (8) to avoid blockage, and driving a scraper (11) to move on the upper surface of a supporting seat (12) to clean dust and impurities into a dust storage tank (13) for storage;

step (4), selecting a first waste heat utilization mechanism (2), filtering the flue gas, and then feeding the filtered flue gas into the first waste heat utilization mechanism (2), so that the flue gas can be preheated while being conveyed to improve the heat exchange performance;

and (5) selecting a second waste heat utilization mechanism (4), filtering the flue gas, and then entering the second waste heat utilization mechanism (4), so that the water stored in the water tank (44) can be heated, the temperature of the flue gas can be reduced, the flue gas is discharged, and the influence on the environment is avoided.

7. The waste heat recovery method of the kiln waste heat recovery and utilization device according to claim 6, characterized in that: in the step (4), the specific operation steps of selecting the waste heat utilization mechanism I (2) are as follows: the coal briquette or coal dust can be stored through the coal storage box (21), the heat output pipe (6) is connected with the input end of the second fan (30) through a pipeline, when the first motor (9) drives the screw rod (7) to rotate, the first bevel gear (14) drives the second bevel gear (15) to rotate, the first gear (17) is driven by the rotating shaft (18) to rotate, the first gear (17) is meshed with the teeth (33), the baffle (23) is driven to rotate at the bottom end of the disc (22), when the positions of the second feed opening (34) and the first feed opening (32) are overlapped, the coal briquette or coal dust falls into the conveying box (27), when the positions of the second feed opening (34) and the first feed opening (32) are staggered, the coal briquette or coal dust can be intermittently conveyed by being blocked by the baffle (23), the second motor (25) drives the spiral conveying shaft (26) to rotate to convey the coal briquette or coal dust, meanwhile, the filtered flue gas is conveyed into a wind conveying pipe (29) through a second fan (30) and conveyed into a conveying box (27) to preheat coal briquettes or coal dust, and the preheated coal briquettes or coal dust enter the kiln.

8. The waste heat recovery method of the kiln waste heat recovery and utilization device according to claim 6, characterized in that: in the step (5), the specific operation steps of selecting the waste heat utilization mechanism I (2) are as follows: the input with heat output tube (6) through pipeline and fan (45) links together, through inlet tube (43) to injecting water in water tank (41), the flue gas after the filtration passes through fan (45) and carries in box (41), the flue gas removes along with the snakelike passageway that a plurality of water tank (41) formed, and heat the water in water tank (41), and reduced the temperature of self, discharge out through the opening of box (41) side.