Hot-method regeneration furnace for used sand

Abstract

The utility model discloses a hot-method regeneration furnace for used sand, which is characterized in that a sand conveying cavity is formed inside a roller part and extends along the transverse direction, one end of the sand conveying cavity is a sand inlet end, and the other opposite end of the sand conveying cavity is a sand outlet end; the driving part is configured to drive the roller part to rotate; the electric heating part is arranged on the roller part and is configured to heat the roller part; the sand adding part is arranged at the sand inlet end of the roller part and is configured to supply used sand into the sand conveying cavity; when the roller part rotates in the first direction, sand in the sand conveying cavity is conveyed in the direction from the sand inlet end to the sand outlet end and discharged out of the roller part from the sand outlet end. When the roller part rotates in the second direction, sand in the sand conveying cavity is conveyed from the sand outlet end to the sand inlet end and discharged out of the roller part from the sand inlet end. The regeneration furnace is horizontal, used sand in the regeneration furnace can be emptied, use and maintenance are convenient, and an electric heating mode is adopted, so that atmosphere pollution is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to old sand regeneration technical field especially relates to a kind of old sand hot method regeneration furnace. BACKGROUND

[0002] Sand mold 3D printing equipment uses resin sand to produce model, and the resin sand after pouring needs to be regenerated, and then the 3D printing equipment can be used normally. The purpose of regeneration is to remove the resin on the surface of the sand.

[0003] The conventional resin sand regeneration method is to use a hot boiling furnace. A high-pressure fan blows air from the bottom of the boiling furnace to blow up the resin sand. The blown-up resin sand contacts the flame sprayed by the natural gas burner, and the resin on the surface of the resin sand is burned out. The exhaust gas after combustion is sucked away by the dust removal system.

[0004] The hot boiling furnace has the following problems: the sand used for 3D printing has a smaller diameter than the conventional casting sand. The high-pressure fan easily blows a large amount of sand into the dust removal system, causing the dust removal system to be blocked. Excessive air enters the boiling furnace, generates a large amount of nitrogen oxides through the combustion of the burner, and pollutes the atmosphere. After the furnace is stopped, a large amount of sand remains in the bottom of the furnace, which cannot be completely discharged, affecting use and maintenance.

[0005] The above information disclosed in the background is only used to increase the understanding of the background of the present application, and therefore, it can include prior art known to those skilled in the art. SUMMARY

[0006] To solve the problems pointed out in the background, the utility model provides an old sand hot method regeneration furnace. The regeneration furnace is horizontal, the old sand in the regeneration furnace can be emptied, which is convenient for use and maintenance, and an electric heating method is used to avoid air pollution.

[0007] To achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions:

[0008] In some embodiments of the present application, an old sand hot method regeneration furnace is provided, which includes a drum part, an inside sand conveying cavity is formed, the sand conveying cavity extends in the transverse direction, the first end of the sand conveying cavity is the sand inlet end, and the second end of the sand conveying cavity is the sand outlet end; a driving part configured to drive the drum part to rotate; an electric heating part arranged on the drum part and configured to heat the drum part; a sand feeding part arranged at the sand inlet end of the drum part and configured to supply old sand into the sand conveying cavity; when the drum part rotates in the first direction, the sand in the sand conveying cavity is conveyed from the sand inlet end to the sand outlet end, and discharged from the sand outlet end of the drum part; when the drum part rotates in the second direction, the sand in the sand conveying cavity is conveyed from the sand outlet end to the sand inlet end, and discharged from the sand inlet end of the drum part.

[0009] In some embodiments of the present application, the sand adding part comprises a second driving motor and a sand adding cylinder, the sand adding cylinder is provided with a spiral blade, the spiral blade is connected with a power shaft of the second driving motor, the sand adding cylinder is provided with a sand adding opening, and the sand adding cylinder extends into the drum part.

[0010] In some embodiments of the present application, the electric heating part is an electromagnetic heating plate, and the electromagnetic heating plate is arranged on the outer peripheral wall of the drum part.

[0011] In some embodiments of the present application, the regenerator further comprises a heat preservation cover, and the heat preservation cover covers the electromagnetic heating plate.

[0012] In some embodiments of the present application, the regenerator further comprises a first cover, the drum part passes through the first cover, the driving part comprises a first driving motor, a power shaft of the first driving motor is connected with a first gear, the outer peripheral wall of the drum part is provided with a rotary bearing, a gear on an outer ring of the rotary bearing is engaged with the first gear, an inner ring of the rotary bearing is fixedly connected with the first cover, the outer peripheral wall of the drum part is provided with a first extension part, the first extension part is fixedly connected with the gear on the outer ring of the rotary bearing, the first gear, the rotary bearing and the first extension part are located in an inner cavity of the first cover, and the first driving motor is arranged outside the first cover.

[0013] In some embodiments of the present application, the regenerator further comprises a second cover, the drum part passes through the second cover, and the first cover and the second cover are arranged along an axial direction of the drum part.

[0014] The outer peripheral wall of the drum part is provided with a second extension part, the second cover is provided with a floating support part, the second extension part is in contact with the floating support part, and the floating support part and the second extension part are located in an inner cavity of the second cover.

[0015] In some embodiments of the present application, the first extension part and the second extension part are hollow structures.

[0016] In some embodiments of the present application, the regenerator further comprises a sand discharging cover, the sand discharging cover is arranged at a sand inlet end of the drum part, and the sand discharging cover is provided with a sand discharging opening.

[0017] In some embodiments of the present application, the regenerator further comprises a sand discharging cover, the sand discharging cover is arranged at a sand inlet end of the drum part, and the sand discharging cover is provided with a sand discharging opening.

[0018] In some embodiments of the application, the inner wall of the drum part is provided with a plurality of spaced material guide plates, the plurality of material guide plates are arranged at the sand inlet end of the drum part, and the material guide plates extend spirally along the axial direction of the drum part; the inner wall of the drum part is provided with a plurality of spaced material lifting plates, the plurality of material lifting plates are arranged between the sand inlet end and the sand outlet end, the electric heating part corresponds to the plurality of material lifting plates, and the material lifting plates extend along the axial direction of the drum part.

[0019] Compared with the prior art, the application has the advantages and positive effects that:

[0020] The regenerator utilizes the electric heating part to heat the drum part, and then heats the sand material in the drum part, and then heats and burns the resin on the surface of the sand material to remove it. During work, the drum part rotates continuously, improving the uniformity of the heating of the sand material and improving the resin burning effect. The electric heating method avoids the air pollution problem caused by the burner in the prior art.

[0021] After work, there is still a certain amount of sand material in the sand conveying cavity. The driving part drives the drum part to rotate reversely, the sand material is conveyed from the sand outlet end to the sand inlet end of the sand conveying cavity, and is discharged from the sand inlet end of the drum part. The regenerator in the prior art is in a vertical manner, and cannot realize emptying of the remaining sand. In the application, the drum part is arranged in a horizontal manner, the conveying direction of the sand material is changed by forward rotation and reverse rotation of the drum part, after work, reverse conveying and emptying of the sand material can be realized, the remaining sand in the drum part is discharged, and subsequent use and maintenance are facilitated.

[0022] Other features and advantages of the application will become more apparent after reading the detailed description of the application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0024] Figure 1 It is a structural view of the old sand hot method regenerator according to some embodiments;

[0025] Figure 2 It is a sectional view of the old sand hot method regenerator according to some embodiments;

[0026] Figure 3 It is a structural view of the drum part and the electric heating part according to some embodiments;

[0027] Figure 4A structure diagram of the drum part according to some embodiments;

[0028] Figure 5 A sectional view of the drum part according to some embodiments;

[0029] Figure 6 A structure diagram of the drum part, the driving part and the floating support part according to some embodiments;

[0030] Figure 7 A structure diagram of the drum part, the driving part according to some embodiments;

[0031] Figure 8 A structure diagram of the floating support part according to some embodiments;

[0032] Figure 9 A structure diagram of the sand adding part according to some embodiments.

[0033] Reference signs:

[0034] 100, drum part; 110, sand conveying cavity; 111, sand inlet end; 112, sand outlet end; 120, material guide plate; 130, material lifting plate; 140, first extension part; 150, second extension part; 161, circumferential rib; 162, radial rib;

[0035] 200, driving part; 210, first driving motor; 220, first gear; 230, slewing bearing; 231, inner ring; 232, outer ring gear;

[0036] 300, electric heating part; 310, electromagnetic heating plate;

[0037] 400, sand adding part; 410, second driving motor; 420, sand adding drum; 430, sand adding opening; 440, helical blade;

[0038] 510, sand discharging shell; 511, fifth side wall; 512, sixth side wall; 513, third circumferential wall; 514, sand discharging opening;

[0039] 520, sand outlet shell; 521, seventh side wall; 522, eighth side wall; 523, fourth circumferential wall; 524, sand outlet opening;

[0040] 530, first shell; 531, first side wall; 532, second side wall; 533, first circumferential wall; 534, first mounting cavity;

[0041] 540, second shell; 541, third side wall; 542, fourth side wall; 543, second circumferential wall; 544, second mounting cavity;

[0042] 550, heat preservation shell;

[0043] 600, air inlet part; 610, air inlet pipe;

[0044] 700, air outlet part; 710, air outlet pipe;

[0045] 800, floating support part; 810, first roller; 820, second roller; 830, mounting frame;

[0046] 910, first sensor; 920, second sensor; 930, third sensor. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0048] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0050] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature therebetween.

[0052] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0053] In some embodiments of the present application, an old sand thermal regeneration furnace is provided, referring to Figure 1 and Figure 2 The regeneration furnace uses an electric heating method to remove the resin on the surface of the old sand.

[0054] The regeneration furnace includes a roller part 100. The structure of the roller part 100 is as shown in Figure 4 and Figure 5 The inside of the roller part 100 forms a sand conveying chamber 110, and the left and right ends of the sand conveying chamber 110 are through. The first end of the sand conveying chamber 110 is the sand inlet end 111, and the second end of the sand conveying chamber 110 is the sand outlet end 112, and the first end is opposite to the second end. The roller part 100 is a horizontal type, that is, the sand conveying chamber 110 extends along the horizontal direction, for example, the sand conveying chamber 110 extends along the horizontal direction.

[0055] The regeneration furnace also includes a driving part 200, which is configured to drive the roller part 100 to rotate. Figure 6 and Figure 7 The structure diagram of the driving part 200 and the roller part 100 is shown. The driving part 200 adopts frequency conversion control, and the residence time of the old sand in the roller part 100 is controlled by adjusting the rotating speed.

[0056] The regeneration furnace also includes an electric heating part 300. The electric heating part 300 is arranged on the roller part 100 and is configured to heat the roller part 100. Figure 3A structure diagram of the drum part 100 and the electric heating part 300.

[0057] The regenerator further comprises a sand adding part 400. The sand adding part 400 is arranged at the sand inlet end 111 of the drum part 100 and is configured to supply old sand into the sand conveying cavity 110. Figure 9 A structure diagram of the sand adding part 400.

[0058] During operation, sand is added into the sand inlet end 111 of the drum part 100 through the sand adding part 400, the driving part 200 drives the drum part 100 to rotate in the first direction (for example, counterclockwise), the electric heating part 300 heats the drum part 100, the temperature of the drum part 100 is increased, the sand in the sand conveying cavity 110 is heated, the resin on the surface of the sand is fully burned, the sand in the sand conveying cavity 110 is conveyed from the sand inlet end 111 to the sand outlet end 112 along with the rotation of the drum part 100, the sand is conveyed and heated in the sand conveying cavity 110, and the sand is conveyed to the sand outlet end 112 and discharged from the drum part 100.

[0059] The regenerator of the present application uses the electric heating part 300 to heat the drum part 100, and then heats the sand in the drum part 100, and then heats and burns the resin on the surface of the sand. During operation, the drum part 100 rotates continuously, which improves the uniformity of the heating of the sand and improves the resin removal effect. The electric heating method avoids the air pollution problem caused by the burner in the prior art.

[0060] After the operation is completed, a certain amount of sand will still exist in the sand conveying cavity, the driving part 200 drives the drum part 100 to rotate in the second direction (for example, clockwise), the sand is conveyed from the sand outlet end 112 to the sand inlet end 111 of the sand conveying cavity 110, and is discharged from the sand inlet end 111 of the drum part 100.

[0061] The regenerator in the prior art is in a vertical manner and cannot realize emptying of the residual sand. The drum part 100 of the present application is arranged in a horizontal manner, the conveying direction of the sand is changed through the forward rotation and the reverse rotation of the drum part 100, the sand is reversely conveyed and emptied after the operation is completed, the residual sand in the drum part 100 is discharged, and the subsequent use and maintenance are facilitated.

[0062] In some embodiments of the present application, the sand adding part 400 adopts a shaftless screw and is controlled by a servo motor. Referring to Figure 2 and Figure 9 The sand adding part 400 comprises a second driving motor 410 and a sand adding cylinder 420. The sand adding cylinder 420 is arranged transversely. One end of the sand adding cylinder 420 is fixedly connected with the housing of the second driving motor 410, and the other opposite end of the sand adding cylinder 420 is open and extends into the drum part 100 and is located at the sand inlet end 111.

[0063] The sand adding cylinder 420 is provided with a helical blade 440 fixedly connected with the power shaft of the second driving motor 410. The sand adding cylinder 420 is provided with a sand adding opening 430. The sand adding opening 430 is arranged at the top of the sand adding cylinder 420.

[0064] When adding sand, the second driving motor 410 is started to drive the helical blade 440 to rotate. The sand is added into the sand adding cylinder 420 through the sand adding opening 430, and the sand is transported into the drum part 100 under the driving of the helical blade 440.

[0065] The second driving motor 410 is controlled by frequency conversion, and the adding amount of the old sand is controlled by adjusting the rotating speed.

[0066] In some embodiments of the present application, with reference to Figure 3 , the electric heating part 300 is an electromagnetic heating plate 310 arranged on the outer peripheral wall of the drum part 100. The electromagnetic heating plate 310 is arc-shaped to tightly fit the outer peripheral wall of the drum part 100, thereby improving the heating effect.

[0067] The heating wire adopts a U-shaped structure, which is convenient for disassembly and maintenance, and at the same time, the contact area with the drum part 100 is increased, thereby improving the heating effect.

[0068] In other embodiments, the electric heating part 300 can also adopt a resistance wire structure or a silicon-carbon rod structure, etc.

[0069] In some embodiments of the present application, with reference to Figure 2 The regenerator further comprises a heat preservation cover 550 surrounding the drum part 100, and the heat preservation cover 550 covers the electromagnetic heating plate 310 to improve the heat preservation effect and reduce the heat loss.

[0070] In some embodiments of the present application, with reference to Figure 2 The regenerator further comprises a first cover 530 through which the drum part 100 passes. The first cover 530 comprises a first side wall 531, a second side wall 532, and a first circumferential wall 533. The first side wall 531 and the second side wall 532 are arranged along the axial direction of the drum part 100, and the first circumferential wall 533 is connected between the first side wall 531 and the second side wall 532. The first cover 530 is formed with a first mounting cavity 534. The first side wall 531 and the second side wall 532 are provided with through openings through which the drum part 100 passes.

[0071] In some embodiments of the present application, with reference to Figure 2 , Figure 6 and Figure 7 The driving part 200 comprises a first driving motor 210, and the power shaft of the first driving motor 210 is connected with the first gear 220.

[0072] The outer peripheral wall of the drum part 100 is provided with a slewing bearing 230, the outer ring 232 of the slewing bearing 230 is in gear with the first gear 220, and the inner ring 231 of the slewing bearing 230 is fixedly connected with the first cover 530, specifically, is fixedly connected with the first side wall 531.

[0073] The outer peripheral wall of the drum part 100 is provided with a first extension part 140, which extends along the circumference direction of the drum part 100. The first extension part 140 is fixedly connected with the outer ring gear 232 of the slewing bearing 230.

[0074] The first gear 220, the slewing bearing 230, and the first extension part 140 are located in the inner cavity of the first cover 530, that is, in the first installation cavity 534, and the first cover 530 plays a protective role for these components. The first driving motor 210 is arranged outside the first cover 530 and is fixedly arranged on the first side wall 531.

[0075] When the first driving motor 210 is started, the first gear 220 is driven to rotate, the first gear 220 drives the outer ring gear 232 of the slewing bearing 230 to rotate, and the outer ring gear 232 of the slewing bearing 230 drives the drum part 100 to rotate synchronously.

[0076] In some embodiments of the present application, with reference to Figure 2 , Figure 6 and Figure 8 The regenerative furnace further comprises a second cover 540, and the drum part 100 passes through the second cover 540. The second cover 540 comprises a third side wall 541, a fourth side wall 542, and a second peripheral wall 543, the third side wall 541 and the fourth side wall 542 are arranged in the axial direction of the drum part 100, and the second peripheral wall 543 is connected between the third side wall 541 and the fourth side wall 542. The second cover 540 forms a second installation cavity 544 therein. The third side wall 541 and the fourth side wall 542 are provided with through openings for the drum part 100 to pass through.

[0077] The outer peripheral wall of the drum part 100 is provided with a second extension part 150, which extends along the circumference direction of the drum part 100. The second cover 540 is provided with a floating support part 800, and the second extension part 150 is in contact with the floating support part 800. The floating support part 800 is arranged on the inner side of the fourth side wall 542. The floating support part 800 and the second extension part 150 are located in the inner cavity of the second cover 540, that is, in the second installation cavity 544.

[0078] The first cover 530 and the second cover 540 are arranged in the axial direction of the drum part 100. The first cover 530 is close to the sand inlet end 111 of the drum part 100, and the second cover 540 is close to the sand outlet end 112 of the drum part 100.

[0079] One end of the drum part 100 is a driving end, and the other opposite end is a driven end. The floating support part 800 is used to support the drum part 100 in a floating manner, thereby improving the rotation reliability of the drum part 100.

[0080] In some embodiments of the present application, referring to Figure 8 , the floating support part 800 includes two floating support parts 800, which are arranged at the lower position of the drum part 100 to support the drum part 100 in a floating manner from the left and right sides of the drum part 100.

[0081] In some embodiments of the present application, the floating support part 800 includes a mounting frame 830, which is fixedly arranged on the inner side of the fourth side wall 542. The mounting frame 830 is provided with a roller, which is in rolling contact with the drum part 100.

[0082] The mounting frame 830 is provided with a first roller 810 and a second roller 820, which are arranged in a circumferential direction of the drum part 100 and improve the support reliability of the drum part 100.

[0083] In some embodiments of the present application, the heat preservation cover 550 is arranged between the first cover 530 and the second cover 540. One end of the heat preservation cover 550 is fixedly connected with the second side wall 532, and the other end is fixedly connected with the third side wall 541. The structure is compact.

[0084] The first cover 530 also plays a role of temperature isolation, thereby reducing the heat generated by the electric heating part 300 from being transferred to the first mounting cavity 534 and causing high temperature of the driving part 200.

[0085] In some embodiments of the present application, the first extension part 140 is in a hollow structure, thereby reducing the heat transferred from the drum part 100 to the driving part 200 and the first cover 530.

[0086] The second extension part 150 is in a hollow structure, thereby reducing the heat transferred from the drum part 100 to the floating support part 800 and the second cover 540.

[0087] In some embodiments of the present application, referring to Figure 4 , the first extension part 140 and the second extension part 150 each include a circumferential ring 161 and a radial ring 162. The circumferential ring 161 surrounds the drum part 100, and the radial ring 162 is arranged in a spaced manner between the circumferential ring 161 and the outer circumferential wall of the drum part 100. Adjacent two radial rings 162 form a hollow structure.

[0088] The circumferential ring 161 of the first extension part 140 is fixedly arranged with the outer ring gear 232 of the rotary bearing 230. The circumferential ring 161 of the second extension part 150 is in contact with the roller of the floating support part 800.

[0089] In some embodiments of the present application, referring to Figure 1 and Figure 2 The regenerator further comprises a sand discharging cover 510 arranged at the sand inlet end 111 of the drum part 100, and the sand discharging cover 510 is provided with a sand discharging opening 514 arranged downward.

[0090] The sand discharging cover 510 comprises a fifth side wall 511, a sixth side wall 512, and a third circumferential wall 513 connected between the fifth side wall 511 and the sixth side wall 512. The third circumferential wall 513 is open at the bottom to form the sand discharging opening 514.

[0091] The fifth side wall 511 is provided with a through opening for the sand feeding cylinder 420 to pass through, and the sixth side wall 512 is provided with a through opening for the drum part 100 to pass through. The sand feeding cylinder 420 extends into the drum part 100 through the fifth side wall 511.

[0092] When the drum part 100 rotates in the second direction, the sand in the drum part 100 is transported from the sand outlet end 112 to the sand inlet end 111, and the sand falls into the sand discharging cover 510 from the sand inlet end 111 and is discharged from the sand discharging opening 514.

[0093] In some embodiments of the present application, referring to Figure 1 and Figure 2 The regenerator further comprises a sand discharging cover 510 arranged at the sand inlet end 111 of the drum part 100, and the sand discharging cover 510 is provided with a sand discharging opening 514 arranged downward.

[0094] The sand discharging cover 510 comprises a fifth side wall 511, a sixth side wall 512, and a third circumferential wall 513 connected between the fifth side wall 511 and the sixth side wall 512. The third circumferential wall 513 is open at the bottom to form the sand discharging opening 514.

[0095] When the drum part 100 rotates in the first direction, the sand in the drum part 100 is transported from the sand inlet end 111 to the sand outlet end 112, and the sand falls into the sand discharging cover 510 from the sand outlet end 112 and is discharged from the sand discharging opening 514.

[0096] In some embodiments of the present application, referring to Figure 5 The inner wall of the drum part 100 is provided with a plurality of guide plates 120 arranged at intervals, and the plurality of guide plates 120 are arranged at the sand inlet end 111 of the drum part 100 and extend spirally along the axial direction of the drum part 100. The guide plates 120 transport the sand at the sand inlet end 111 to the middle part of the sand conveying chamber 110.

[0097] In some embodiments of the present application, referring to Figure 5The inner wall of the drum part 100 is provided with a plurality of spaced-apart material lifting plates 130, which are arranged between the sand inlet end 111 and the sand outlet end 112. The electric heating part 300 corresponds to the plurality of material lifting plates 130. The material lifting plates 130 extend along the axial direction of the drum part 100, i.e., the material lifting plates 130 are straight plates.

[0098] The material lifting plates 130 lift the sand material to be heated uniformly and ensure that the resin on the surface of the sand material is completely burned. During the lifting and falling of the sand material, the sand material collides and rubs against each other, which helps to knock off the resin ash attached to the surface of the sand material.

[0099] In some embodiments of the present application, with reference to Figure 1 and Figure 2 The regenerator further comprises an air inlet part 600. The air inlet part 600 is in communication with the sand conveying chamber 110 and is configured to supply gas into the sand conveying chamber 110.

[0100] The regenerator further comprises an air outlet part 700. The air outlet part 700 is in communication with the sand conveying chamber 110 and is configured to discharge the gas in the sand conveying chamber 110.

[0101] By providing the air inlet part 600 and the air outlet part 700, the gas flow is formed in the drum part 100, and the dirty air after the resin on the surface of the sand material is heated and burned is discharged in time.

[0102] In some embodiments of the present application, the air inlet part 600 is arranged at the sand outlet end 112 of the drum part 100, and the air outlet part 700 is arranged at the sand inlet end 111 of the drum part 100. In this way, the gas flow direction in the drum part 100 is opposite to the conveying direction of the sand material, and the gas flow can more effectively blow away the resin ash attached to the surface of the sand material.

[0103] In some embodiments of the present application, the air inlet part 600 comprises an air inlet pipe 610 and an external air source (not shown). The air inlet pipe 610 is fixedly arranged on the second housing 540. For example, the air inlet pipe 610 is fixedly arranged on the eighth side wall 522, and the air inlet pipe 610 extends along the axial direction of the drum part 100.

[0104] The air outlet part 700 comprises an air outlet pipe 710 and an external dust removal system (not shown). The air outlet pipe 710 is fixedly arranged on the first housing 530. For example, the air outlet pipe 710 is fixedly arranged on the top of the third circumferential wall 513.

[0105] In some embodiments of the present application, a first sensor 910 is arranged on the air outlet part 700, and the first sensor 910 is configured to detect the negative pressure of the sand inlet end 111 of the drum part 100.

[0106] A second sensor 920 is arranged on the drum part 100, and the second sensor 920 is configured to detect the temperature of the sand inlet end 111 of the drum part 100.

[0107] The air intake part 600 is configured to adjust the air intake amount according to the detection data of the first sensor 910 and the second sensor 920, and the air exhaust part 700 is configured to adjust the air exhaust amount according to the detection data of the first sensor 910 and the second sensor 920, so as to match the air intake amount and the air exhaust amount, and further to reduce the excessive hot air drawn by the dust removal system on the basis of sufficient combustion of the sand surface resin, thereby achieving energy saving and emission reduction.

[0108] In some embodiments of the present application, the third sensor 930 is arranged on the drum part 100 and is configured to detect the temperature of the sand outlet end 112 of the drum part 100.

[0109] In some embodiments of the present application, the regenerator further comprises a flame injection part (not shown) configured to inject flame into the inner cavity of the drum part 100. Specifically, the flame injection part injects flame into the sand inlet end 111 of the drum part 100. The flame injection part uses natural gas fuel or other fuel. In this way, the regenerator is a double-burning regenerator. The drum part 100 is heated to a high temperature by the electromagnetic heating plate 310 on the outside to form a high-temperature conduction and heat radiation inside, and the drum part 100 is heated to a high temperature. The flame injection part provides flame heating inside, which increases auxiliary heating and can flame burn the organic matter of the resin that cannot be fully burned inside to fully decompose to meet the emission standard.

[0110] In some embodiments of the present application, the regenerator has a first working stage. The drum part 100 rotates at a first speed, the drum part 100 rotates in a first direction, the electric heating part 300 heats the drum part 100, and after the temperature of the drum part 100 rises to a first temperature interval, the sand adding part 400 adds sand into the sand conveying cavity 110. The sand adding amount of the sand adding part 400 changes from small to large.

[0111] Specifically, the first working stage is a combustion stage of the regenerator. The drum part 100 rotates slowly first, the electric heating part 300 heats the drum part 100, the drum part 100 heats up quickly, the temperature measured by the third sensor 930 is used to control the heating power of the electromagnetic heating plate 310 by using PID technology, and when the temperature of the drum part 100 rises to a set temperature value, for example, 700°C, the power of the electromagnetic heating plate 310 is reduced to maintain the temperature of the drum part 100 stable.

[0112] After the temperature of the drum part 100 reaches the first temperature interval required by the process, the second driving motor 410 starts, the sand adding part 400 starts to add sand into the drum part 100, and the sand adding amount gradually increases to a set value. According to the sand adding amount of the sand adding part 400 and the temperature of the sand outlet end 112 of the drum part 100, the rotation speed of the drum part 100 can be adjusted to ensure that the adding amount of the old sand matches the processing amount of the drum part 100.

[0113] In the combustion process, according to the data of the first sensor 910 and the second sensor 920, the air inlet and the air inlet amount of the pipe are adjusted to match the air extraction amount of the exhaust part 700, so that the old sand surface resin is fully combusted, and the excessive hot air extracted by the exhaust dust removal system is reduced, thereby achieving energy saving and emission reduction.

[0114] In some embodiments of the present application, the regenerator has a second working stage, the sand adding part 400 stops adding sand, the drum part 100 rotates at a second speed, the drum part 100 rotates in a second direction, the power of the electric heating part 300 is reduced, and when there is no residual sand in the sand conveying cavity 110, the drum part 100 stops rotating, and the electric heating part 300 stops heating.

[0115] In other words, the second working stage is the shutdown stage of the regenerator, when the regenerator is ready to shut down, the second drive motor 410 stops first, the sand adding part 400 stops adding sand, the drum part 100 rotates slowly for a period of time, the drum part 100 rotates in a second direction, ensures that the residual tail sand in the drum part 100 can be completely processed, and is discharged from the sand discharge port 514, at the same time, the power of the electromagnetic heating plate 310 is slowly reduced, and when the old sand in the drum part 100 is completely discharged, the regenerator stops working.

[0116] In some embodiments of the present application, the regenerator has a third working stage, the air inlet part 600 increases the air inlet amount, and the exhaust part 700 increases the exhaust amount according to the detection data of the third sensor 930, so as to accelerate the cooling of the drum part 100.

[0117] In other words, the third working stage is the shutdown and maintenance stage of the regenerator, the air inlet pipe 610 increases the amount of cold air added, and the exhaust part 700 increases the air extraction amount according to the temperature of the sand outlet end 112 of the drum part 100 measured by the third sensor 930, so as to rapidly cool the drum part 100 and reduce the shutdown time increased due to waiting for the equipment to cool down.

[0118] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0119] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A furnace for thermal reclamation of spent sand, characterized in that The sand regenerating furnace comprises: a drum part, an internal sand conveying cavity is formed in the drum part, the sand conveying cavity extends in the transverse direction, a first end of the sand conveying cavity is a sand inlet end, and a second end of the sand conveying cavity is a sand outlet end; a driving part configured to drive the drum part to rotate; an electric heating part arranged on the drum part and configured to heat the drum part; a sand feeding part arranged at the sand inlet end of the drum part and configured to supply old sand into the sand conveying cavity; when the drum part rotates in a first direction, sand in the sand conveying cavity is conveyed from the sand inlet end to the sand outlet end, and the sand is discharged from the drum part through the sand outlet end; when the drum part rotates in a second direction, sand in the sand conveying cavity is conveyed from the sand outlet end to the sand inlet end, and the sand is discharged from the drum part through the sand inlet end.

2. The sand regenerating furnace according to claim 1, wherein the sand feeding part comprises a second driving motor and a sand feeding cylinder, a helical blade is arranged in the sand feeding cylinder, the helical blade is connected with a power shaft of the second driving motor, a sand feeding opening is arranged on the sand feeding cylinder, and the sand feeding cylinder extends into the drum part.

3. The sand regenerating furnace according to claim 1, wherein the electric heating part is an electromagnetic heating plate, and the electromagnetic heating plate is arranged on an outer peripheral wall of the drum part.

4. The sand regenerating furnace according to claim 3, wherein the sand regenerating furnace further comprises a heat preservation cover, and the heat preservation cover covers the electromagnetic heating plate.

5. The sand regenerating furnace according to claim 1, wherein the sand regenerating furnace further comprises a first cover, and the drum part passes through the first cover; the driving part comprises a first driving motor, a power shaft of the first driving motor is connected with a first gear, a rotary bearing is arranged on an outer peripheral wall of the drum part, an outer ring gear of the rotary bearing is engaged with the first gear, an inner ring of the rotary bearing is fixedly connected with the first cover, a first extension part is arranged on the outer peripheral wall of the drum part, and the first extension part is fixedly connected with the outer ring gear of the rotary bearing, the first gear, the rotary bearing, and the first extension part are located in an inner cavity of the first cover, and the first driving motor is arranged outside the first cover.

6. The sand regenerating furnace according to claim 5, wherein the sand regenerating furnace further comprises a second cover, the drum part passes through the second cover, the first cover and the second cover are arranged in the axial direction of the drum part, a second extension part is arranged on the outer peripheral wall of the drum part, a floating support part is arranged on the second cover, the second extension part is in contact with the floating support part, and the floating support part and the second extension part are located in an inner cavity of the second cover.

7. The sand regenerating furnace according to claim 6, wherein the first extension part and the second extension part are hollow structures.

8. The sand regenerating furnace according to any one of claims 1 to 7, wherein The regenerating furnace further comprises a sand discharging cover arranged at the sand inlet end of the drum part, and the sand discharging cover is provided with a sand discharging opening. 9.The old sand hot method regenerating furnace according to any one of claims 1 to 7, characterized in that, The regenerating furnace further comprises a sand discharging cover arranged at the sand inlet end of the drum part, and the sand discharging cover is provided with a sand discharging opening. 10.The old sand hot method regenerating furnace according to any one of claims 1 to 7, characterized in that, The inner wall of the drum part is provided with a plurality of spaced-apart guide plates, the plurality of guide plates are arranged at the sand inlet end of the drum part, and the guide plates extend spirally along the axial direction of the drum part. The inner wall of the drum part is provided with a plurality of spaced-apart lifting plates, the plurality of lifting plates are arranged between the sand inlet end and the sand outlet end, the electric heating part corresponds to the plurality of lifting plates, and the lifting plates extend along the axial direction of the drum part.

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