CN216620457U

CN216620457U - Grit drying equipment

Info

Publication number: CN216620457U
Application number: CN202220065954.0U
Authority: CN
Inventors: 朱春明; 沈振华; 朱建华
Original assignee: Zhangjiagang Songxin New Building Materials Co ltd
Current assignee: Zhangjiagang Songxin New Building Materials Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-05-27
Anticipated expiration: 2032-01-11

Abstract

The application relates to the field of building raw material preparation, in particular to a sand drying device, which comprises a bottom frame, wherein a screen drum with two ends different in height is rotatably connected to the bottom frame, a toothed ring is arranged on the screen drum, a motor is arranged on the bottom frame, and a gear meshed with the toothed ring is connected to a rotating shaft of the motor; one side of the bottom frame is provided with a heating kiln with two open ends, a conveyor belt penetrating through the two ends of the heating kiln is arranged in the heating kiln, and one end of the conveyor belt, which is close to the bottom frame, is positioned below the bottom end of the screen drum. This application has the effect of being convenient for promote the efficiency of dry grit.

Description

Grit drying equipment

Technical Field

The application relates to the field of building raw materials preparation, especially, relate to a grit drying equipment.

Background

Impurities such as soil are often attached to the surface of the building sandstone after the sandstone is manufactured, so that the sandstone needs to be cleaned and dried before use.

In actual building scene, the grit generally piles up the inside comparatively moist grit heap of journey, during the use, needs construction worker to take out partial grit from the grit heap, then carries out the shakeout processing with the grit of taking out, uses after reusing the fan weathers the grit.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: before the sandstone is used, the sandstone needs to be spread out firstly, and then the spread sandstone is dried by a fan, so that the process of drying the sandstone wastes time and energy and is low in efficiency.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the efficiency of promoting dry grit, this application provides a grit drying equipment.

The application provides a grit drying equipment adopts following technical scheme:

a sand drying device comprises a bottom frame, wherein a screen drum with two ends different in height is rotatably connected to the bottom frame, a gear ring is arranged on the screen drum, a motor is arranged on the bottom frame, and a gear meshed with the gear ring is connected to a rotating shaft of the motor; one side of chassis is equipped with the heating kiln that both ends were opened, be equipped with in the heating kiln and pass the conveyer belt at heating kiln both ends, just the conveyer belt is close to the one end of chassis is located the below of sieve section of thick bamboo bottom.

Through adopting above-mentioned technical scheme, drive the gear through the motor and rotate, because the ring gear meshing on gear and the sieve section of thick bamboo, the event is put a back rethread motor drive sieve section of thick bamboo with the grit and is rotated, and the water on the grit can break away from the grit under the effect of gravity and the effect of the centrifugal force that produces when the sieve section of thick bamboo is rotatory. Further, the grit through a sieve section of thick bamboo can further landing under the effect of gravity to the conveyer belt on, then heats the grit on the conveyer belt through the heating kiln again to further dry the grit, so be convenient for promote the efficiency of dry grit.

Preferably, the screen cylinder comprises a first screen cylinder and a second screen cylinder which are coaxially arranged, the diameter of the first screen cylinder is larger than that of the second screen cylinder, and the size of the screen hole of the first screen cylinder is smaller than that of the screen hole of the second screen cylinder; the first sieve section of thick bamboo with be connected with the retaining ring piece between the top of second sieve section of thick bamboo, first sieve section of thick bamboo with connect through a plurality of bracing pieces between the bottom of second sieve section of thick bamboo.

Through adopting above-mentioned technical scheme, first sieve section of thick bamboo can carry out elementary dewatering to the grit when rotating, and in first sieve section of thick bamboo pivoted, partial grit gets into second sieve section of thick bamboo from first sieve section of thick bamboo, and second sieve section of thick bamboo can carry out secondary dewatering to the less grit of granule in the pivoted, to sum up, carries out the dewatering to the grit through first sieve section of thick bamboo and second sieve section of thick bamboo to be convenient for promote the efficiency of dry grit.

Preferably, a first support frame is arranged at the position, below the top end of the first screen drum, of the underframe, a first limiting ring is arranged on the first support frame, a first annular groove is formed in the first limiting ring, and a first annular strip extending into the first annular groove is arranged on the outer wall of the top end of the first screen drum; still be equipped with the second spacing ring on the chassis, just be equipped with the second annular on the second spacing ring, be equipped with on the outer wall of the bottom of a first sieve section of thick bamboo and stretch into the first ring strip of first annular.

Through adopting above-mentioned technical scheme, because the first ring strip on the first sieve section of thick bamboo stretches into first annular, the second ring strip on the first sieve section of thick bamboo stretches into and stretches into the second annular, so can make first sieve section of thick bamboo rotate the use on first spacing ring and second spacing ring, so be convenient for drive the sieve section of thick bamboo through the motor and rotate the use on the chassis to make first sieve section of thick bamboo and connect the second sieve section of thick bamboo in first sieve section of thick bamboo and carry out the dewatering treatment to the grit, and then be convenient for promote the efficiency of dry grit.

Preferably, the chassis is provided with a first slide rail with two different end heights below the bottom end of the first screen drum, the top end of the first slide rail is arranged below the bottom end of the first screen drum, and the bottom end of the first slide rail is arranged above the conveyor belt.

Through adopting above-mentioned technical scheme, the grit can be followed the bottom roll-off of a first sieve section of thick bamboo and a second sieve section of thick bamboo under the effect of gravity, and the further first slide rail landing of accessible of the grit of roll-off is to the conveyer belt on, and first slide rail still can play the effect of direction and buffering to the grit from the bottom roll-off of a first sieve section of thick bamboo and a second sieve section of thick bamboo to be convenient for promote the grit and slide the stability to the conveying in-process from a first sieve section of thick bamboo and a second sieve section of thick bamboo.

Preferably, the heating kiln comprises a kiln body with two open ends, and heating furnaces are arranged on two sides of the kiln body; the kiln is characterized in that a plurality of first heat conduction pipes penetrating through the side wall of the kiln body are arranged on the side wall of the kiln body, the first heat conduction pipes are located at one end, outside the kiln body, of the first heat conduction pipes are jointly connected with second heat conduction pipes communicated with the heating furnace, and the first heat conduction pipes 223 are located at one end, inside the kiln body, of the first heat conduction pipes are provided with air nozzles facing the conveying belt.

Through adopting above-mentioned technical scheme, through heating furnace heated air, then it is internal through first air introduction to the kiln that leads to heat pipe 223, second heat pipe and air nozzle with the heating furnace heating to be in the internal portion of kiln and be located the grit on the conveyer belt and carry out heat treatment, accelerate the speed of grit surface moisture vaporization, and then be convenient for promote the efficiency of dry grit.

Preferably, a negative pressure pump is arranged between the heating furnace and the second heat transfer pipe, an air inlet of the negative pressure pump is communicated with the heating furnace through a third heat transfer pipe, and an air outlet of the negative pressure pump is communicated with the second heat transfer pipe through a fourth heat transfer pipe.

Through adopting above-mentioned technical scheme, can let through the negative pressure pump and produce pressure differential between the internal and the internal portion of kiln in the heating furnace to be convenient for promote the leading-in inside speed of the kiln of the hot-air that produces in the heating furnace, so be convenient for promote the rising speed of the internal space temperature of kiln.

Preferably, the heating furnace is provided with an air outlet connected with the third heat pipe, and the air outlet is provided with a filter screen.

By adopting the technical scheme, the filter screen on the air outlet of the heating furnace can prevent large-volume impurities in hot air generated in the heating furnace from being led into the kiln body and further added into the sandstone, thereby further avoiding reducing the purity of the building raw materials containing the sandstone.

Preferably, the kiln body is provided with a mounting groove, a fan is arranged in the mounting groove, the kiln body is provided with a ventilation pipe, one end of the ventilation pipe is communicated with the mounting groove, and the other end of the ventilation pipe is positioned at the top of the inner space of the kiln body.

By adopting the technical scheme, the hot air injected into the kiln body through the paint spraying nozzle firstly rises to the top of the internal space of the kiln body due to the lower density of the hot air; and the ventilation pipe that sets up at the internal space top of kiln through the mouth of pipe can be with the wind injection that produces through the fan to the internal space of kiln to be convenient for blow the hot-blast grit to the conveyer belt in the internal space of kiln, so be convenient for promote the efficiency of heating grit.

Preferably, the both sides of conveyer belt all are equipped with a plurality of support piece, just every side of conveyer belt support piece all is connected with the baffle jointly, and the bottom of baffle all is close to the top setting of conveyer belt.

Through adopting above-mentioned technical scheme, the grit that gets into on the conveyer belt from a sieve section of thick bamboo still has certain kinetic energy so that the grit is still unstable when just arriving the conveyer belt on, sets up the baffle in the both sides of conveyer belt and is favorable to preventing the grit landing from the conveyer belt to the stability of using the conveyer belt to transmit the grit has been promoted.

Preferably, one end of the conveyor belt, which is far away from the first slide rail, is provided with a second slide rail and a second support frame, which is located above the second slide rail, the second support frame is provided with an air blower, and an air outlet of the air blower faces the second slide rail.

Through adopting above-mentioned technical scheme, when the grit was followed the landing on the second slide rail, the rethread air-blower air-dries the grit of landing and handles, so is convenient for promote the efficiency of dry grit.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sand and stone with high water content are attached to the surface of the screen cylinder for dewatering treatment, and then the sand and stone are heated by the heating kiln, so that the vaporization process of the water content on the surface of the sand and stone is accelerated, and the efficiency of drying the sand and stone is improved conveniently;

2. the efficiency of guiding the air heated by the heating furnace into the internal space of the kiln body can be increased through the negative pressure pump, so that the temperature rise speed of the internal space of the kiln body is increased, and the efficiency of drying the sand and stone is increased;

3. after the gravel is subjected to heating treatment of the kiln body, the gravel is further subjected to air drying treatment through the air blower, so that the efficiency of drying the gravel is improved.

Drawings

Fig. 1 is an overall structure schematic diagram of a grit drying equipment in this application embodiment.

Fig. 2 is a schematic structural diagram of a water removal mechanism in an embodiment of the present application.

Fig. 3 is an exploded view for showing a positional relationship between a first screen drum and a second screen drum in an embodiment of the present application.

Fig. 4 is a schematic structural view of a heating mechanism in the embodiment of the present application.

Fig. 5 is a schematic structural diagram for showing a positional relationship among the third heat pipe, the fourth heat pipe, and the negative pressure pump in the embodiment of the present application.

Fig. 6 is a sectional view for showing a positional relationship between a fan and a kiln body in an embodiment of the present application.

Fig. 7 is an enlarged view of a portion a in fig. 6.

Fig. 8 is a schematic structural view for embodying the heating mechanism and the seasoning mechanism in the embodiment of the present application.

Description of reference numerals: 1. a water removal mechanism; 11. a chassis; 12. a screen cylinder; 121. a first screen cylinder; 122. a second screen cylinder; 123. a fixed ring sheet; 124. a support bar; 125. a first loop bar; 126. a second loop bar; 13. a toothed ring; 14. a motor; 15. a gear; 16. a first support frame; 17. a first limit ring; 171. a first ring groove; 172. a first support block; 18. a second stop collar; 181. a second ring groove; 182. a second support block; 19. a first slide rail; 2. a heating mechanism; 21. a conveyor belt; 22. heating the kiln; 221. a kiln body; 222. heating furnace; 223. the first heat flux pipe 223; 224. an air nozzle; 225. a second heat pipe; 226. a negative pressure pump; 227. a third heat pipe; 228. a fourth heat pipe; 229. an air outlet; 23. filtering with a screen; 24. mounting grooves; 25. a fan; 26. a vent pipe; 27. a support member; 28. a baffle plate; 3. an air drying mechanism; 31. a second slide rail; 32. a second support frame; 33. a blower.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses grit drying equipment. Referring to fig. 1, grit drying equipment is including being used for carrying out dewatering treatment's dewatering mechanism 1 to the grit, one side of dewatering mechanism 1 is equipped with and is used for carrying out heat treatment's heating mechanism 2 to the grit after dewatering treatment, the one end that dewatering mechanism 1 was kept away from to heating mechanism 2 is equipped with and is used for further carrying out the air-dry mechanism 3 of air-drying treatment to the grit after heat treatment.

Referring to fig. 2, the water removing mechanism 1 includes a bottom frame 11, a first support frame 16 is disposed at one end of a top wall of the bottom frame 11, a first support block 172 is disposed on the top wall of the first support frame 16, and a first limit ring 17 is connected to the first support block 172. The other end of the top wall of the underframe 11 is provided with a second supporting block 182, the first supporting block is connected with a second limiting ring 18 which has the same central axis as the first limiting ring 17, the position of the first limiting ring 17 is higher than that of the second limiting ring 18, and the inner diameters of the first limiting ring 17 and the second limiting ring 18 are the same. The first limit ring 17 and the second limit ring 18 are connected with a screen cylinder 12 passing through the first limit ring 17 and the second limit ring 18 in a rotating mode, and the screen cylinder 12, the first limit ring 17 and the second limit ring 18 are arranged on the same central axis.

Referring to fig. 3, the screen cylinder 12 includes a first screen cylinder 121 and a second screen cylinder 122 disposed inside the first screen cylinder 121 and disposed through a central axis of the first screen cylinder 121, and the screen cylinder 12 on the second screen cylinder 122 has larger screen holes than those on the first screen cylinder 121. Since the position of the first retainer ring 17 is higher than that of the second retainer ring 18, and the screen cylinder 12 is mounted on the first retainer ring 17 and the second retainer ring 18, the first screen cylinder 121 and the second screen cylinder 122 are disposed obliquely. A fixed ring piece 123 is connected between the top ends of the first limiting ring 17 and the second limiting ring 18, the fixed ring piece 123 and the first limiting ring 17 are also arranged on the same central axis, the inner edge of the fixed ring piece 123 is connected with the outer edge of the end part of the second screen drum 122, and the outer edge of the fixed ring piece 123 is connected with the inner edge of the end part of the first screen drum 121. Four support rods 124 are connected between the bottom ends of the first limiting ring 17 and the second limiting ring 18, one end of each support rod 124 is connected with the inner side wall of the bottom end of the first limiting ring 17, and the other end of each support rod 124 is connected with the outer side wall of the bottom end of the second limiting ring 18.

The first ring strip 125 is fixed on the outer side wall of the top end of the first screen cylinder 121, the inner side wall of the first limit ring 17 is provided with a first ring groove 171 for the first ring strip 125 to extend into, and the first ring strip 125 can rotate in the first ring groove 171. The outer side wall of the bottom end of the first screen cylinder 121 is fixed with a second ring strip 126, the inner side wall of the second limit ring 18 is provided with a second ring groove 181 for the second ring strip 126 to extend into, and the second ring strip 126 can rotate in the second ring groove 181.

Referring to fig. 1, the top wall of the first support frame 16 is further provided with a motor 14, and with reference to fig. 3, a rotating shaft of the motor 14 is provided with a gear 15. A gear ring 13 which is arranged with the same central axis of the first screen cylinder 121 is fixed on the outer side wall of the top end of the first screen cylinder 121, and the gear ring 13 is meshed with a gear 15 on the rotating shaft of the motor 14.

One end of the underframe 11 connected with the second supporting block 182 is connected with a first slide rail 19 with two different end heights, and the top end of the first slide rail 19 is located at a position below the bottom end of the first screen drum 121.

In the implementation, the motor 14 drives the first screen cylinder 121 to rotate, and since the second screen cylinder 122 is fixedly connected to the first screen cylinder 121 through the fixing ring piece 123 and the plurality of support rods 124, the first screen cylinder 121 also drives the second screen cylinder 122 to rotate when rotating. At this time, the sand with the surface adhered with more moisture is poured into the second screen cylinder 122 from the top end of the second screen cylinder 122, and at this time, the moisture on the surface of the sand can be separated from the surface of the sand under the action of the gravity of the sand and further flows out of the screen holes of the second screen cylinder 122; further, the second screen cylinder 122 can drive the sand entering the second screen cylinder 122 to rotate while rotating, so that the water on the surface of the sand can be further separated from the surface of the sand under the action of centrifugal force along with the sand rotating by the second screen cylinder 122.

Since the mesh of the second screen cylinder 122 is larger than the mesh of the first screen, when the second screen cylinder 122 rotates, a part of the sand with a smaller internal volume enters the first screen cylinder 121 from the second screen cylinder 122 and further rotates along with the first screen cylinder 121, so that the water on the surface of the sand entering the first screen cylinder 121 is separated again by the centrifugal force and flows out of the screen of the first screen cylinder 121.

After the sand is subjected to water removal treatment through the first screen drum 121 and the second screen drum 122, the sand between the first screen drum 121 and the second screen drum 122 and the sand in the second screen drum 122 can slide to the bottom ends of the first screen drum 121 and the second screen drum 122 under the action of gravity, and further slide onto the first slide rail 19.

Referring to fig. 1 and 4, the heating mechanism 2 includes a conveyor belt 21 disposed below the bottom end of the first slide rail 19, and a plurality of supporting members 27 are connected to both sides of the conveyor belt 21, and a baffle 28 disposed along the conveying direction of the conveyor belt 21 is connected to the supporting members 27 on each side of the conveyor belt 21, and the bottom edge of each baffle 28 is disposed near the top of the conveyor belt 21, so that when the conveyor belt 21 is used to convey sand, the sand can be prevented from falling off the conveyor belt 21.

Referring to fig. 4, the heating kiln 22 is further disposed outside the conveyor belt 21, the heating kiln 22 includes a kiln body 221 having two open ends for accommodating the conveyor belt 21, the kiln body 221 is in the form of an arch, and the conveyor belt 21 extends out of the two ends of the kiln body 221. The two sides of the kiln body 221 are both provided with the heating furnace 222, and taking one side of the kiln body 221 as an example, with reference to fig. 1, the side wall of the heating furnace 222 close to the kiln body 221 is provided with an air outlet 229 for leading out hot air.

Referring to fig. 1 and 5, a filter screen 23 whose edge is attached to the air outlet 229 is disposed in the air outlet 229, a negative pressure pump 226 is disposed between the heating furnace 222 and the kiln body 221, and a third heat pipe 227 is connected between the air outlet 229 of the heating furnace 222 and an air inlet of the negative pressure pump 226.

A plurality of first heat transfer pipes 223 penetrating through the side wall of the kiln body 221 are horizontally arranged on the side wall of the kiln body 221, one ends of the first heat transfer pipes 223, which are positioned outside the kiln body 221, are jointly connected with second heat transfer pipes 225 arranged along the length direction of the kiln body 221, two ends of the second heat transfer pipes 225 are sealed, and a third heat transfer pipe 227 is connected between the side wall of the second heat transfer pipes 225 and an air outlet of the negative pressure pump 226. The first heat pipes 223 are provided with air nozzles 224 at one ends thereof located in the kiln body 221, and the air nozzles 224 are all disposed toward the top of the conveyor belt 21.

In the implementation, the heating furnace 222 generates hot air, and the air outlet 229 of the heating furnace 222 is further provided with the filter screen 23, so that impurities in the hot air can be filtered through the filter screen 23, and the impurities in the hot air can be prevented from influencing the purity of sand. A pressure difference is generated between the heating furnace 222 and the second heat-transfer pipe 225 by the negative pressure pump 226, so that the flow rate of the hot air into the second heat-transfer pipe 225 can be increased by the negative pressure pump 226. The hot air flowing into the second heat transfer pipe 225 further enters the kiln body 221 through the first heat transfer pipe 223 and is discharged toward the sand on the conveyor belt 21 through the paint spraying nozzle, so that the purpose of heating the sand on the conveyor belt 21 can be achieved by the hot air.

Referring to fig. 6 and 7, a mounting groove 24 is formed in the top of the kiln body 221, a fan 25 is arranged in the mounting groove 24, a ventilation pipe 26 is further arranged on the top of the kiln body 221, one end of the ventilation pipe 26 is communicated with the mounting groove 24, and the other end of the ventilation pipe 26 is communicated with the inner space of the kiln body 221 from the top of the inner side wall of the kiln body 221.

In the implementation, the hot air that gets into kiln body 221 inner space through the paint spraying nozzle is because its density is less, so the hot air can up float, produces wind through fan 25 in mounting groove 24 this moment, and wind further blows downwards from kiln body 221 inner space's top via ventilation pipe 26, can drive the hot air of come-up and move toward conveyer belt 21 like this, so be convenient for improve the temperature of conveyer belt 21 top department, and then be convenient for heat the grit on conveyer belt 21 and improve the efficiency of drying the grit.

Referring to fig. 1 and 7, the seasoning mechanism 3 includes a second slide rail 31 disposed at an inclined position at an end of the conveyor belt 21 away from the water removing device, and a top end of the second slide rail 31 is located at a position below an end of the conveyor belt 21. The conveyor belt 21 is further provided with a second support frame 32, the second support frame 32 is provided with an air blower 33, and an air outlet of the air blower 33 is arranged above the second slide rail 31.

In operation, after the sand is heated, the sand is further conveyed to the second slide rail 31 by the conveyor belt 21, and in the process of slipping the sand from the second slide rail 31, the sand is blown by the blower 33, so as to further achieve the purpose of air drying the sand.

The implementation principle of this application embodiment sand and stone drying equipment is: after the sand is guided into the screen cylinder 12, the purpose of removing the water on the surface of the sand as much as possible is achieved through the rotation of the screen cylinder 12; further, the sand subjected to the water removal treatment is conveyed to the heating mechanism 2 through the conveyor belt 21, and then the sand on the conveyor belt 21 is subjected to the heating treatment through the heating mechanism 2, so that the water on the surface of the sand is vaporized; still further, dry the processing through the grit after air-drying mechanism 3 to the heating, can be convenient for promote the efficiency of dry grit through carrying out dewatering, heating and air-dried processing to the grit in proper order.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a grit drying equipment which characterized in that: the screening device comprises an underframe (11), wherein the underframe (11) is rotatably connected with a screening drum (12) with two ends different in height, a toothed ring (13) is arranged on the screening drum (12), a motor (14) is arranged on the underframe (11), and a rotating shaft of the motor (14) is connected with a gear (15) meshed with the toothed ring (13); one side of chassis (11) is equipped with heating kiln (22) that both ends were opened, be equipped with in heating kiln (22) and pass conveyer belt (21) at heating kiln (22) both ends, just conveyer belt (21) are close to the one end of chassis (11) is located the below of sieve section of thick bamboo (12) bottom.

2. A sand drying apparatus according to claim 1, wherein: the screen drum (12) comprises a first screen drum (121) and a second screen drum (122) which are coaxially arranged, the diameter of the first screen drum (121) is larger than that of the second screen drum (122), and the size of a screen hole of the first screen drum (121) is smaller than that of a screen hole of the second screen drum (122); the top ends of the first screen drum (121) and the second screen drum (122) are connected with a fixed ring piece (123), and the bottom ends of the first screen drum (121) and the second screen drum (122) are connected through a plurality of support rods (124).

3. Grit drying apparatus according to claim 2, wherein: a first support frame (16) is arranged on the bottom frame (11) below the top end of the first screen drum (121), a first limiting ring (17) is arranged on the first support frame (16), a first annular groove (171) is arranged on the first limiting ring (17), and a first annular strip (125) extending into the first annular groove (171) is arranged on the outer wall of the top end of the first screen drum (121); still be equipped with second spacing ring (18) on chassis (11), just be equipped with second annular (181) on second spacing ring (18), be equipped with on the outer wall of the bottom of a first sieve section of thick bamboo (121) and stretch into first circumferential strip (125) of first annular (171).

4. A sand drying apparatus according to claim 3, wherein: just be located on chassis (11) the below position of a first sieve section of thick bamboo (121) bottom is equipped with first slide rail (19) of both ends difference in height, just the top setting of first slide rail (19) is in the below position of a first sieve section of thick bamboo (121) bottom, the bottom setting of first slide rail (19) is in the top of conveyer belt (21).

5. Grit drying apparatus according to claim 4, wherein: the heating kiln (22) comprises a kiln body (221) with two open ends, and heating furnaces (222) are arranged on two sides of the kiln body (221); be equipped with a plurality of first logical heat pipe (223) that pass on the lateral wall of the kiln body (221), and a plurality of first logical heat pipe (223) are located kiln body (221) outside one end connect with jointly with second logical heat pipe (225) that heating furnace (222) communicate, first logical heat pipe (223) are located kiln body (221) inside one end is equipped with the orientation air nozzle (224) that the conveyer belt top set up.

6. Grit drying apparatus according to claim 5, wherein: a negative pressure pump (226) is arranged between the heating furnace (222) and the second heat transfer pipe (225), an air inlet of the negative pressure pump (226) is communicated with the heating furnace (222) through a third heat transfer pipe (227), and an air outlet of the negative pressure pump (226) is communicated with the second heat transfer pipe (225) through a fourth heat transfer pipe (228).

7. Grit drying apparatus according to claim 6, wherein: and an air outlet (229) connected with the third heat pipe (227) is formed in the heating furnace (222), and a filter screen (23) is arranged on the air outlet (229).

8. Grit drying apparatus according to claim 7, wherein: the kiln is characterized in that a mounting groove (24) is formed in the kiln body (221), a fan (25) is arranged in the mounting groove (24), a ventilation pipe (26) with one end communicated with the mounting groove (24) is arranged on the kiln body (221), and the other end of the ventilation pipe (26) is located at the top of the inner space of the kiln body (221).

9. Sand drying apparatus according to claim 8, in which: both sides of conveyer belt all are equipped with a plurality of support piece (27), just every side of conveyer belt support piece (27) all are connected with baffle (28) jointly, and the bottom of baffle (28) all is close to the top setting of conveyer belt (21).

10. A sand drying apparatus according to claim 9, wherein: one end of the conveyor belt (21) far away from the first slide rail (19) is provided with a second slide rail (31) and a second support frame (32) located above the second slide rail (31), an air blower (33) is arranged on the second support frame (32), and an air outlet of the air blower (33) faces the second slide rail (31).