CN113639536A

CN113639536A - Grinding raw material drying system utilizing flue gas waste heat

Info

Publication number: CN113639536A
Application number: CN202110962725.9A
Authority: CN
Inventors: 李勋
Original assignee: Zhengzhou Wote Energy Saving Technology Inc
Current assignee: Zhengzhou Wote Energy Saving Technology Inc
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2021-11-12

Abstract

The invention provides a grinding raw material drying system utilizing flue gas waste heat, which belongs to the technical field of drying equipment and comprises: one end of the drying cylinder is provided with a feeding hole, and the other end is provided with a discharging hole; the stirring and conveying mechanism is arranged in the drying cylinder and is used for stirring materials and propelling the materials to move from the feed port to the discharge port; further comprising: mix air inlet unit, set up in discharge gate department, mix air inlet unit and include the mixing box that can dismantle the connection with the discharge gate, can dismantle the hedging air inlet cover of being connected with the mixing box, the hedging air inlet cover includes can dismantle main lid, the symmetry of being connected with the mixing box and sets up two at least intake pipes on main lid, and two intake pipes that the symmetry set up are in same straight line, the external high temperature flue gas supply equipment of intake pipe. The invention can improve the use capacity of the waste heat of the high-temperature tail gas, can quickly and uniformly mix the high-temperature tail gas provided by a plurality of high-temperature tail gas supply devices, avoids large temperature fluctuation in the drying device, and ensures good drying effect.

Description

Grinding raw material drying system utilizing flue gas waste heat

Technical Field

The invention relates to the technical field of drying equipment, in particular to a grinding raw material drying system utilizing flue gas waste heat.

Background

With the continuous development of economy, the problems of energy shortage, greenhouse effect, environmental pollution and the like are increasingly highlighted, the survival and development of human beings are threatened, and energy conservation and emission reduction become important development subjects of the whole world. Enterprises are the main bodies of the economic society, the energy conservation and emission reduction work of the enterprises is realized, and the enterprise is the important factor in the energy conservation and emission reduction career of the whole society.

Industrial enterprises have huge energy consumption and large emission pressure, and are urgently required to implement energy conservation and emission reduction, and like the coal coking industry, the metallurgical steel industry and the cement industry, a large amount of waste heat, smoke and tail gas are generated in the production process, and the direct emission can cause environmental pollution and energy waste. The energy is reasonably collected and utilized, so that pollution can be reduced, and energy recycling is realized. The industries in China have huge scale and yield, so that the industries have huge energy-saving requirements.

The existing drying system utilizing the waste heat of the flue gas directly enters the drying equipment to dry materials in the drying equipment after filtering high-temperature flue gas and tail gas. Current drying equipment is at the drying process, the hot gas flow moves along from the afterbody, fully contact with the material, through heat-conduction, convection current, radiant heat transfer volume make full use of, directly transmit heat energy for the material, the moisture that makes the material constantly is evaporated in the barrel, the induced air device of pan feeding mouth department takes out a large amount of moisture, wet gas flow, prevent the dust and arrange the secondary pollution who causes outward, stir through the interior spiral, sweep and scatter, the flight, impel the material motion, guarantee that the material is abundant with hot gas in the barrel, even contact, accomplish whole drying process. The existing drying equipment is often provided with only one gas inlet, namely one drying equipment only corresponds to one hot gas supply equipment, so that one-to-many drying equipment cannot be realized, the use capability of the waste heat of the flue gas and the tail gas is required to be improved, and the practicability is not strong; if the tail gas outlet of a plurality of high-temperature tail gas supply equipment is directly connected with the air inlet of the same drying equipment, various tail gases are generated in different production stages in respective production systems, the residual heat temperature of various tail gases can be greatly different, the tail gases are directly introduced into the drying equipment, the temperature fluctuation in the drying equipment is directly caused to be large, the temperature in the drying equipment is unstable and uneven, and the drying effect is influenced. Therefore, a grinding raw material drying system using the waste heat of the flue gas is needed to overcome the above problems.

Disclosure of Invention

In view of this, the invention provides a grinding raw material drying system using flue gas waste heat, which not only can simultaneously correspond to a plurality of high-temperature tail gas supply devices to improve the use capacity of the high-temperature tail gas waste heat, but also can rapidly and uniformly mix the high-temperature tail gas provided by the plurality of high-temperature tail gas supply devices, thereby avoiding unstable and nonuniform temperature in the drying device due to large temperature fluctuation of the high-temperature tail gas introduced into the drying device, and ensuring good drying effect.

In order to solve the technical problem, the invention provides a grinding raw material drying system using flue gas waste heat, comprising:

one end of the drying cylinder is provided with a feeding hole, and the other end is provided with a discharging hole;

the stirring and conveying mechanism is arranged in the drying cylinder and is used for stirring materials and propelling the materials to move from the feed port to the discharge port;

further comprising:

mix air inlet unit, set up in discharge gate department, mix air inlet unit include can dismantle the mixing box of being connected with the discharge gate, can dismantle the hedging air inlet cover of being connected with the mixing box, the hedging air inlet cover includes can dismantle main lid, the symmetry of being connected with the mixing box and sets up two at least intake pipes on main lid, and the extension line of two intake pipes that the symmetry set up is same straight line, the external high temperature flue gas supply equipment of intake pipe.

Further, the main cover body comprises a groove cover detachably connected with the mixing box and an offset barrel cover connected with the groove cover, the connection surface area of the offset barrel cover connected with the groove cover is smaller than that of the groove cover connected with the mixing box, and the air inlet pipe is connected with the offset barrel cover.

Furthermore, the pipe diameter of one end of the air inlet pipe connected with the hedging barrel cover is gradually reduced towards the pipe diameter of the other end.

Further, the mixing box includes can dismantle the box of being connected, can dismantle the case lid that sets up in the other end of box with the discharge gate, the hedging air inlet cover can be dismantled with the case lid and be connected.

Further, the case lid includes can dismantle the apron of being connected with the box, set up the inlet opening on the apron, set up the toper fill on the apron, set up the filter plate that the other end was fought to the toper, the aperture area of the one end that toper fill and apron are connected diminishes in proper order to the aperture area of the one end of keeping away from the apron.

Further, at least two reinforcing plates are arranged on the cover plate in a crossed mode, and the crossed point of the at least two reinforcing plates is located in the positive center position of the cover plate and the air inlet opening.

Further, be equipped with the vortex mechanism that is used for accelerating gaseous mixing in the box, vortex mechanism is including setting up mounting bracket in the box, setting up the flow guide box on the mounting bracket, setting up the rotatory vortex subassembly in the flow guide box, all be equipped with the water conservancy diversion blow vent on the flow guide box is close to one side lateral wall of case lid and is close to one side lateral wall of feed inlet.

Further, the vortex subassembly is including setting up center pin, the rotation in the flow guide box and setting up a plurality of vortex fans on the center pin.

Furthermore, a valve is arranged on the air inlet pipe and is a plate valve or a butterfly valve.

The technical scheme of the invention has the following beneficial effects:

1. the mixed gas inlet device is arranged at the discharge port, and can be simultaneously butted with a plurality of high-temperature tail gas supply devices, so that the use capacity of the waste heat of the high-temperature tail gas is improved;

2. the mixed air inlet device comprises a mixing box detachably connected with the discharge port and an opposite air inlet cover detachably connected with the mixing box, the opposite air inlet cover comprises a main cover body detachably connected with the mixing box and at least two air inlet pipes symmetrically arranged on the main cover body, the two air inlet pipes symmetrically arranged are positioned on the same straight line, the air inlet pipes are externally connected with high-temperature flue gas supply equipment, flue gas provided by a plurality of high-temperature flue gas supply equipment flows into the main cover body through the air inlet pipes symmetrically arranged, and the two air inlet pipes symmetrically arranged are positioned on the same straight line, so that opposite impact can be generated on the high-temperature flue gas flowing to the main cover body at the same time, the mixing speed of the high-temperature flue gas and the high-temperature flue gas is accelerated, the mixing efficiency is improved, the unstable and uneven temperature in the drying equipment caused by large temperature fluctuation in the drying equipment is avoided, and the good drying effect is ensured;

3. the main cover body comprises a groove cover detachably connected with the mixing box and an offset barrel cover connected with the groove cover, the area of a connecting surface, connected with the groove cover, on the offset barrel cover is smaller than that of a connecting surface, connected with the mixing box, on the groove cover, the air inlet pipe is connected with the offset barrel cover, so that the multiple high-temperature smoke is firstly offset and introduced into the offset barrel cover, and due to the fact that the internal space of the offset barrel cover is small, the multiple high-temperature smoke is mixed more quickly in a relatively narrow space, the mixing speed is further accelerated, and the mixing efficiency and the mixing effect are improved;

4. the pipe diameter of one end of the air inlet pipe connected with the hedging barrel cover is gradually reduced towards the pipe diameter of the other end of the air inlet pipe connected with the hedging barrel cover, so that the flow velocity of high-temperature flue gas is buffered, a plurality of high-temperature flue gas which are hedged flows into the hedging barrel cover relatively at a constant speed, and a good mixing effect is ensured;

5. the box cover comprises a cover plate detachably connected with the box body, an air inlet opening formed in the cover plate, a conical hopper arranged on the cover plate and a filter plate arranged at the other end of the conical hopper, wherein the caliber area of one end, connected with the cover plate, of the conical hopper is gradually reduced towards the caliber area of one end far away from the cover plate, and the mixed high-temperature flue gas is guided and filtered, so that impurities in the high-temperature flue gas flowing into the drying equipment are reduced, and the influence on the quality of the dried material due to the introduction of excessive impurities is avoided;

6. the cover plate is provided with at least two reinforcing plates in a crossed manner, and the crossed point of the at least two reinforcing plates is positioned at the positive center of the cover plate and the air inlet opening, so that the structural strength of the cover plate provided with the air inlet opening is improved, the cover plate is prevented from being easily deformed, and the service life is prolonged;

7. the turbulence mechanism for accelerating gas mixing is arranged in the box body, and the mixing effect of high-temperature flue gas is further improved in a turbulence mode, so that multiple high-temperature flue gas from different high-temperature flue gas supply devices are mixed more uniformly, and the temperature of the mixed flue gas is relatively more stable.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the hybrid intake system of the present invention;

FIG. 3 is a schematic view of the mixing box of the present invention;

FIG. 4 is a perspective view of the spoiler mechanism of the present invention;

FIG. 5 is a schematic view of the structure of the mixing lid of the present invention;

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a rear view of FIG. 5;

FIG. 8 is a perspective view of the hybrid cover of the present invention;

FIG. 9 is a schematic structural view of the hedging air inlet cap of the present invention;

FIG. 10 is a left side view of FIG. 9;

fig. 11 is a bottom view of fig. 9.

In the figure:

1. a power distribution cabinet;

2. a barrel;

3. a feed pipe;

4. a feed inlet;

5. a discharge port;

6. a mixing box; 601. a box body; 602. a cover frame; 603. a conical hopper; 604. an air inlet connecting flange; 605. filtering the plate; 606. a cover plate; 607. a reinforcing plate;

7. oppositely rushing the air inlet cover; 701. a slot cover; 702. oppositely punching the barrel cover; 703. a main air inlet pipe; 704. a secondary air inlet pipe; 705. a reinforcing plate; 706. a main plate valve; 707. a secondary plate valve;

8. a flow disturbing mechanism; 801. a mounting frame; 802. a central shaft; 803. a turbulent fan; 804. a diversion box.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 11 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

As shown in fig. 1 to 11, a grinding raw material drying system using waste heat of flue gas includes:

one end of the drying cylinder body 2 is provided with a feeding hole 4, and the other end is provided with a discharging hole 5;

the stirring and conveying mechanism is arranged inside the drying cylinder 2 and is used for stirring materials and propelling the materials to move from the feed port 4 to the discharge port 5;

further comprising:

mix air inlet unit, set up in discharge gate 5 department, mix air inlet unit include can dismantle the mixing box 6 of being connected with discharge gate 5, can dismantle the hedging air inlet cover 7 of being connected with mixing box 6, the hedging air inlet cover 7 includes can dismantle main lid of being connected with mixing box 6, two at least intake pipes that the symmetry set up on main lid, the extension line of two intake pipes that the symmetry set up is same straight line, the external high temperature flue gas supply equipment of intake pipe.

Specifically, a utilize grinding raw and other materials drying system of flue gas waste heat includes:

the drying device comprises a drying barrel body 2, wherein the drying barrel body 2 is fixedly supported by a supporting seat, the drying barrel body 2 is obliquely arranged, the left end of the drying barrel body 2 is higher than the right end of the drying barrel body, a feeding hole 4 is formed in the left end of the drying barrel body, a discharging hole 5 is formed in the right end of the drying barrel body, and the feeding hole 4 is connected with a feeding pipe 3 and used for feeding materials into the drying barrel body 2;

the stirring and conveying mechanism is arranged inside the drying cylinder 2, is used for spiral stirring and conveying in the prior art, and is used for stirring materials and propelling the materials to move from the feed port 4 to the discharge port 5, so that the materials can uniformly roll in the drying cylinder 2 and move from the feed port 4 to the discharge port 5 at a constant speed;

the power distribution cabinet 1 is arranged at the position, close to the feed inlet 4 of the drying cylinder 2, of the left end in the prior art, so that the control and operation of workers are facilitated;

further comprising:

the mixed air inlet device is arranged at a discharge port 5 at the right end of the drying barrel body 2 and can be simultaneously butted with a plurality of high-temperature tail gas supply devices to improve the using capacity of the waste heat of the high-temperature tail gas, the mixed air inlet device comprises a mixing box 6 detachably connected with the discharge port 5 and an opposite air inlet cover 7 detachably connected with the mixing box 6, the opposite air inlet cover 7 comprises a main cover body detachably connected with the mixing box 6 and at least two air inlet pipes symmetrically connected on the main cover body, the extension lines of the two symmetrically arranged air inlet pipes are the same straight line, the air inlet pipes are externally connected with the high-temperature flue gas supply devices, the flue gas provided by the high-temperature flue gas supply devices flows into the main cover body through the symmetrically arranged air inlet pipes, and because the extension lines of the two symmetrically arranged air inlet pipes are the same straight line, the high-temperature flue gas flowing to the main cover body can generate opposite collision simultaneously, thereby accelerating the mixing speed of the high-temperature flue gas and the high-temperature flue gas, the mixing efficiency is improved, unstable and uneven temperature in the drying equipment caused by large temperature fluctuation in the drying equipment is avoided, and the good drying effect is ensured.

According to an embodiment of the present invention, as shown in fig. 1-2 and fig. 9-11, the main cover body comprises a slot cover 701 detachably connected to the right side wall of the mixing box 6 by bolts, and a counterpunch cover 702 fixedly connected to the right side wall of the slot cover 701, and a reinforcing plate 705 is welded between the counterpunch cover 702 and the slot cover 701 to improve the structural strength. The area of the connecting surface of the hedging barrel cover 702 connected with the slot cover 701 is smaller than that of the connecting surface of the slot cover 701 connected with the mixing box 6, and the air inlet pipe is connected with the hedging barrel cover 702. Make multichannel high temperature flue gas offset earlier let in offset bung 702, because the inner space of offset bung 702 is little for multichannel high temperature flue gas is more quick in relatively narrow and small space mixture, further accelerates the mixing speed, improves mixing efficiency and mixed effect.

Further, the pipe diameter of the end of the air inlet pipe connected with the hedging barrel cover 702 is gradually reduced towards the pipe diameter of the other end. The buffer function is played to the flow velocity of the high-temperature flue gas, so that a plurality of high-temperature flue gases which are oppositely flushed flow into the opposite flushing barrel cover 702 at a relatively constant speed, and a good mixing effect is ensured. Of course, in other embodiments, the inner diameter of the inlet tube may be constant.

In this embodiment, as shown in fig. 9, two main air inlet pipes 703 on the same straight line are connected to the opposite barrel cover 702, two secondary air inlet pipes 704 are symmetrically connected to each main air inlet pipe 703, an included angle between the main air inlet pipe 703 and the secondary air inlet pipe 704 connected thereto is an acute angle, and the four secondary air inlet pipes 704 correspond to each other in a pairwise manner and are respectively located on two crossed straight lines. Thus, the main intake pipe 703 can be connected to a high-temperature flue gas supply device with a large supply amount of high-temperature flue gas, and the sub-intake pipe 704 can be connected to a high-temperature flue gas supply device with a relatively small supply amount of flue gas, so that the practicability is higher.

In the above embodiment, the main air inlet pipe 703 and the secondary air inlet pipe 704 are both provided with valves, which may be plate valves, the main air inlet pipe 703 is provided with a main plate valve 706, and the secondary air inlet pipe 704 is provided with a secondary plate valve 707. In other embodiments, the valve may be a butterfly valve.

According to another embodiment of the invention, as shown in fig. 1-2 and fig. 5-8, the mixing box 6 comprises a box body 601 detachably connected with the discharge port 5 through a bolt, and a box cover detachably mounted on the right side wall of the box body 601 through a bolt, and the opposite-impact air inlet cover 7 is detachably connected with the box cover through a bolt, so that the assembly and disassembly are convenient.

Further, the box cover comprises a cover frame 602 detachably connected with the box body 601, a cover plate 606 fixedly welded in the cover frame 602, an air inlet opening formed in the cover plate 606, a conical hopper 603 installed on the cover plate 606, and a filter plate 605 installed at the other end of the conical hopper 603, wherein an air inlet connecting flange 604 is welded on the air inlet opening, and can be detachably connected with the slot cover 701 through bolts. The caliber area of one end of the conical hopper 603 connected with the cover plate 606 is gradually reduced towards the caliber area of one end far away from the cover plate 606. When the cover is mounted with the housing 601, the tapered bucket 603 is located within the housing 601. Flue gas after the misce bene gets into toper fill 603 through inlet opening, and toper fill 603 carries out the water conservancy diversion to the high temperature flue gas after mixing, and filter plate 605 filters mixed flue gas, reduces the impurity in the high temperature flue gas that flows into drying equipment, avoids influencing the quality of stoving material because of introducing impurity too much.

In other embodiments, two reinforcing plates 607 are crosswise welded to the cover plate 606, the two reinforcing plates 607 are vertically arranged, and the intersection point of the two reinforcing plates 607 is located at the center of the cover plate 606 and the air inlet opening, so as to improve the structural strength of the cover plate 606, prevent easy deformation, and prolong the service life.

In an embodiment of the invention, as shown in fig. 2-3, a flow disturbance mechanism 8 for accelerating the uniform mixing of the gas is installed in the box body 601, the flow disturbance mechanism 8 includes an installation frame 801 installed in the box body 601, a flow guide box 804 installed on the installation frame 801, and a rotary flow disturbance assembly installed in the flow guide box 804, and flow guide vents are respectively arranged on a side wall of the flow guide box 804 close to the box cover and a side wall of the flow guide box 804 close to the feed port 4, so as to ensure smooth flow guide of the mixed flue gas. Through the mode of vortex, the mixed flue gas of disturbance further improves the mixed effect of high temperature flue gas for the multichannel comes from the high temperature flue gas of different high temperature flue gas supply equipment to mix more evenly, guarantees to mix the temperature of flue gas more stable relatively.

Further, the spoiler assembly includes a central shaft 802 installed in a flow guide box 804, and four spoiler fans 803 rotatably installed on the central shaft 802 through bearings. The mixed flue gas blows the turbulence fan 803 to rotate, and no additional power source is needed, so that energy is saved. The rotation of the turbulent fan 803 causes a turbulent flow effect on the mixed flue gas, further improving the mixing effect of the high-temperature flue gas. In other embodiments, the central shaft 802 can also be directly rotatably mounted on the mounting frame 801 through the bearing seat and the bearing, the flow guide box 804 is movably penetrated through the central shaft 802, the turbulence fan 803 is fixedly sleeved on the central shaft 802, and the mixed smoke blows the turbulence fan 803, so that the central shaft 802 is directly driven to rotate by taking the central axis as the center, and the turbulence effect can be achieved without an additional power source.

The working principle of the invention is as follows: the operation of the drying system is adjusted and controlled by a worker through a power distribution cabinet 1, materials to be dried (grinding raw materials) are added into a drying cylinder 2 through a feeding pipe 3 arranged at a feeding hole 4, and a stirring and conveying mechanism in the drying cylinder 2 stirs the materials and pushes the materials to move from the feeding hole 4 to a discharging hole 5; the two main air inlet pipes 703 and the two secondary air inlet pipes 704 positioned on the same straight line are externally connected with high-temperature flue gas supply equipment, the corresponding main plate valves 706 and the secondary plate valves 707 are in an open state, the other two secondary air inlet pipes 704 are not used, and the secondary plate valves 707 on the other two secondary air inlet pipes are in a closed state; two liang of high temperature flue gases get into in the inside that space narrow and small relatively of hedge bung 702, take place the hedge collision for they misce bene more fast, then pass cell-cover 701 inner space and the opening of admitting air, via the toper fill 603 water conservancy diversion again, filter through filter plate 605, cleaner mixed flue gas blows to vortex fan 803, need not in addition the power supply can reach the vortex effect, further promotes the flue gas and mixes the effect. Finally, mix the flue gas and get into stoving barrel 2 through discharge gate 5 in, mix the flue gas and follow the discharge gate 5 of stoving barrel 2 and to the motion of feed inlet 4 direction, with the material fully contact in rolling, give the material with heat energy direct transfer, make the moisture of material constantly evaporated in the barrel, feed inlet 4 department installs induced air device (prior art, not shown in the figure) and takes out moisture, prevents to arrange outward and causes secondary pollution. The drying system provided by the invention can not only simultaneously correspond to a plurality of high-temperature tail gas supply devices to improve the use capacity of the waste heat of the high-temperature tail gas, but also quickly and uniformly mix the high-temperature tail gas provided by the plurality of high-temperature tail gas supply devices, so that the temperature in the drying device is prevented from being unstable and nonuniform due to large temperature fluctuation of the high-temperature tail gas introduced into the drying device, and the good drying effect is ensured.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides an utilize grinding raw and other materials drying system of flue gas waste heat, includes:

a drying cylinder (2), one end of which is provided with a feed inlet (4) and the other end of which is provided with a discharge outlet (5);

the stirring and conveying mechanism is arranged inside the drying cylinder (2) and is used for stirring materials and propelling the materials to move from the feeding hole (4) to the discharging hole (5);

it is characterized by also comprising:

mix air inlet unit, set up in discharge gate (5) department, mix air inlet unit include with discharge gate (5) can dismantle mixing box (6) of being connected, can dismantle hedging air inlet cover (7) of being connected with mixing box (6), hedging air inlet cover (7) include can dismantle main lid of being connected, symmetry with mixing box (6) and set up two at least intake pipes on main lid, and the extension line of two intake pipes that the symmetry set up is same straight line, the external high temperature flue gas supply equipment of intake pipe.

2. The ground raw material drying system utilizing the waste heat of the flue gas as claimed in claim 1, wherein the main cover body comprises a slot cover (701) detachably connected with the mixing box (6) and an opposite flushing barrel cover (702) connected with the slot cover (701), the area of the connecting surface of the opposite flushing barrel cover (702) connected with the slot cover (701) is smaller than the area of the connecting surface of the slot cover (701) connected with the mixing box (6), and the air inlet pipe is connected with the opposite flushing barrel cover (702).

3. The ground raw material drying system using the waste heat of flue gas as claimed in claim 2, wherein the pipe diameter of one end of the air inlet pipe connected with the hedging barrel cover (702) is gradually reduced toward the pipe diameter of the other end.

4. The grinding raw material drying system utilizing the waste heat of the flue gas as claimed in claim 1, wherein the mixing box (6) comprises a box body (601) detachably connected with the discharge port (5), and a box cover detachably arranged at the other end of the box body (601), and the hedging air inlet cover (7) is detachably connected with the box cover.

5. The grinding raw material drying system utilizing the waste heat of the flue gas as claimed in claim 4, wherein the box cover comprises a cover plate (606) detachably connected with the box body (601), an air inlet opening formed in the cover plate (606), a conical hopper (603) arranged on the cover plate (606), and a filter plate (605) arranged at the other end of the conical hopper (603), and the caliber area of one end of the conical hopper (603) connected with the cover plate (606) is gradually reduced towards the caliber area of one end far away from the cover plate (606).

6. The ground raw material drying system using residual heat of flue gas as claimed in claim 5, wherein at least two reinforcing plates (607) are crosswise arranged on the cover plate (606), and the intersection point of the at least two reinforcing plates (607) is located at the center of the cover plate (606) and the air inlet opening.

7. The powder grinding raw material drying system utilizing the waste heat of the flue gas as claimed in claim 4, wherein a flow disturbance mechanism (8) for accelerating the mixing of the gas is arranged in the box body (601), the flow disturbance mechanism (8) comprises an installation frame (801) arranged in the box body (601), a flow guide box (804) arranged on the installation frame (801) and a rotary flow disturbance assembly arranged in the flow guide box (804), and flow guide vents are arranged on the side wall of the flow guide box (804) close to the box cover and the side wall of the side close to the feed inlet (4).

8. The grinding raw material drying system using the waste heat of flue gas as claimed in claim 7, wherein the turbulence component comprises a central shaft (802) arranged in the flow guiding box (804), and a plurality of turbulence fans (803) rotatably arranged on the central shaft (802).

9. The grinding raw material drying system utilizing the waste heat of flue gas as claimed in any one of claims 1 to 8, wherein a valve is arranged on the gas inlet pipe, and the valve is a plate valve or a butterfly valve.