Auxiliary drying equipment for a dryer used in barium sulfate production

Abstract

The invention relates to the technical field of barium sulfate production and proposes auxiliary drying equipment for a dryer used for barium sulfate production. The equipment comprises an auxiliary drying chamber; a barium sulfate heating and drying component, the barium sulfate heating and drying component comprising a conical sliding cover and an electric heater, the conical sliding cover being installed inside the auxiliary drying chamber, the electric heater being installed inside the conical sliding cover, and a barium sulfate dry material falling control component being installed inside the auxiliary drying chamber; a barium sulfate block material crushing component, the barium sulfate block material crushing component comprising an upper grinding plate, a lower grinding plate and a barium sulfate powder screen, the barium sulfate powder screen being located between the upper grinding plate and the lower grinding plate, a grinding drive mechanism being installed inside the auxiliary drying chamber, and a barium sulfate powder blowing-off component, the barium sulfate powder blowing-off component being used to blow off the barium sulfate powder on the surface of the lower grinding plate. The barium sulfate of the invention has relatively uniform particle size and relatively uniform dryness.

Description

Technical Field

[0001] The invention relates to the technical field of barium sulfate production, and in particular to auxiliary drying equipment of a dryer used in barium sulfate production. Background Art

[0002] In the process of producing and preparing barium sulfate, it is necessary to carry out drying and dehydration. The barium sulfate wet material is gradually made sticky, hardened, and finally loose during the drying process. At present, rotary drum drying machine is mainly used to dry barium sulfate. Due to its own structure, the flue gas duct and the like will inevitably crack after being heated and expanded, resulting in smoke leakage, thereby contaminating the product. In addition, the barium sulfate adhering to the cylinder wall is prone to produce "hard spots" during the drying process, thereby affecting the quality of the product. In the process of drying the barium sulfate wet material with the current dryer, the uniformity of the barium sulfate wet material is difficult to control, and the barium sulfate will be compacted during the drying process, resulting in the larger volume of the bonded barium sulfate not being completely dried inside, while the smaller or finely divided barium sulfate has been dried, resulting in poor particle size and dryness uniformity of the finished barium sulfate product, and the quality of the finished barium sulfate product is difficult to control. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In view of the deficiencies of the prior art, the present invention provides an auxiliary drying device for a dryer for barium sulfate production to solve the problems of the prior art mentioned in the background technology.

[0005] (2) Technical solution

[0006] To achieve the above object, the present invention provides the following technical solution: an auxiliary drying device for a dryer for barium sulfate production, comprising:

[0007] an auxiliary drying chamber, the auxiliary drying chamber being connected to the top of the barium sulfate disc dryer through a drop pipe;

[0008] A feed hopper connected to the top of the auxiliary drying chamber and used for feeding wet barium sulfate into the auxiliary drying chamber;

[0009] A barium sulfate heating and drying component, comprising a conical sliding cover and an electric heater, wherein the conical sliding cover is installed inside the auxiliary drying chamber, and a gap is left between the bottom of the conical sliding cover and the inner wall of the auxiliary drying chamber, and a barium sulfate dry material falling control component for opening and closing the gap between the bottom of the conical sliding cover and the inner wall of the auxiliary drying chamber is installed inside the auxiliary drying chamber, the electric heater is installed inside the conical sliding cover, the feed hopper is located directly above the center position of the conical sliding cover, and a plurality of blocking plates are installed on the outer side wall of the conical sliding cover for slowing down the falling speed of the barium sulfate wet material so that the barium sulfate wet material can be fully dried;

[0010] The barium sulfate dry material drop control assembly includes a drop control electric cylinder and a closed material blocking ring. The drop control electric cylinder is installed on the top of the auxiliary drying chamber. The closed material blocking ring, the inner wall of the auxiliary drying chamber, and the bottom of the conical sliding cover are in sealed sliding cooperation.

[0011] A barium sulfate block crushing component, the barium sulfate block crushing component includes an upper grinding plate, a lower grinding plate and a barium sulfate powder screen, a grinding cylinder is installed inside the auxiliary drying chamber, the barium sulfate powder screen is installed inside the grinding cylinder, the upper grinding plate and the lower grinding plate are both in sliding fit with the grinding cylinder, the barium sulfate powder screen is located in the middle of the upper grinding plate and the lower grinding plate, and the upper grinding plate, the lower grinding plate and the barium sulfate powder screen have equal areas, and a grinding drive mechanism for driving the upper grinding plate and the lower grinding plate to move back and forth relative to each other is installed inside the auxiliary drying chamber;

[0012] The grinding drive mechanism includes a driving motor and two connected reciprocating screws, the driving motor is installed inside the auxiliary drying chamber, the upper grinding plate and the lower grinding plate are respectively equipped with nuts matching the corresponding reciprocating screws, the reciprocating screws are fixedly installed at the output end of the driving motor, and the top end of the reciprocating screws is rotationally matched with the tapered slide cover;

[0013] The barium sulfate powder blowing-off component comprises a plurality of high-pressure nozzles, which are installed on the side wall of the auxiliary drying chamber. The plurality of high-pressure nozzles are interconnected and connected to an external air supply device for blowing off the barium sulfate powder on the surface of the lower grinding plate.

[0014] In order to assist the barium sulfate wet material blocked by the blocking sheet on the surface of the conical sliding cover to fall, and at the same time accelerate the removal of moisture in the barium sulfate wet material, a plurality of blowing nozzles are installed on the side wall of the auxiliary drying chamber. The plurality of blowing nozzles are connected by a connecting pipe, and the connecting pipe is connected to the high-pressure nozzle.

[0015] In order to preheat the gas blown into the auxiliary drying chamber, a preheating box is installed on the periphery of the auxiliary drying chamber. The preheating box is connected to an air supply pipe. The preheating box is connected to the high-pressure nozzle and the blowing nozzle. A waste heat recovery pipe is provided inside the preheating box. The waste heat recovery pipe is connected to the hot air pipe inside the barium sulfate disc dryer through a connector. The waste heat recovery pipe passes through the preheating box and extends to the outside.

[0016] In order to further improve the utilization rate of the waste heat of the barium sulfate disc dryer, the waste heat recovery pipe is arranged in a serpentine shape inside the preheating box, and a plurality of heat dissipation fins are provided on the periphery of the waste heat recovery pipe.

[0017] In order to make the material fall quickly and avoid accumulation between the feed hopper and the conical sliding cover, a drop cone is installed on the top of the conical sliding cover, and a vibration motor is installed inside the drop cone.

[0018] In order to reduce obstruction to materials and avoid material accumulation, the inner wall of the auxiliary drying chamber is installed with a motor mounting plate through multiple mounting columns. The drive motor is installed on the motor mounting plate. The mounting column is triangular prism-shaped, and one of the corner edges of the mounting column faces upward.

[0019] In order to make the barium sulfate dry material falling from between the conical sliding cover and the inner wall of the auxiliary drying chamber fall into the interior of the grinding cylinder, the top edge of the inner wall of the grinding cylinder is provided with a chamfer.

[0020] In order to prevent the barium sulfate material from clogging the high-pressure nozzle, the inner wall of the auxiliary drying chamber is fixedly connected to a plurality of rotating seats, and a rotating cover plate is rotatably installed at the bottom of the rotating seat. The plurality of rotating cover plates are respectively located at the air outlet of the corresponding high-pressure nozzle and are used to close the high-pressure nozzle. At the same time, when the high-pressure nozzle sprays air, the rotating cover plate is blown upward to blow off the barium sulfate powder on the lower grinding plate.

[0021] (3) Beneficial effects

[0022] Compared with the known public technology, the present invention provides an auxiliary drying device for a dryer for barium sulfate production, which has the following beneficial effects:

[0023] In the present invention, the barium sulfate wet material to be dried first enters the interior of the auxiliary drying chamber, the interior of the auxiliary drying chamber, especially the conical sliding cover, is heated by an electric heater, the barium sulfate wet material is heated and dried by the conical sliding cover, the gap between the bottom of the conical sliding cover and the inner wall of the auxiliary drying chamber is opened and closed by a barium sulfate dry material drop control component, so that the dried block barium sulfate dry material falls, the upper grinding plate and the lower grinding plate are driven to approach each other by a grinding drive mechanism, the upper grinding plate and the lower grinding plate and the barium sulfate powder screen cooperate to grind the block barium sulfate dry material, the barium sulfate dry material powder passes through the barium sulfate powder screen and falls on the surface of the lower grinding plate, the barium sulfate powder on the surface of the lower grinding plate is blown off by a barium sulfate powder blowing component to the interior of the barium sulfate disc dryer for further drying. Compared with the above-mentioned prior art, this solution can avoid the barium sulfate dry material from becoming compacted, the particle size of the barium sulfate is more uniform, and the dryness of the barium sulfate is also more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0025] Figure 1 It is a schematic diagram of a partially cutaway three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention and the barium sulfate disc dryer;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the exploded three-dimensional structure of the barium sulfate dry material falling control component of the present invention;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the barium sulfate heating and drying component and the barium sulfate block crushing component of the present invention.

[0030] The numbers in the figure represent:

[0031] 1. Barium sulfate tray dryer; 2. Auxiliary drying chamber; 3. Feed hopper; 4. Mounting column; 5. Support column; 6. Blowing nozzle; 7. Connecting pipe; 8. Preheating box; 9. Air supply pipe; 10. Waste heat recovery pipe; 11. Heat dissipation fins; 12. Rotating cover;

[0032] 100. Barium sulfate heating and drying component; 101. Conical sliding cover; 102. Electric heater; 103. Baffle; 104. Dropping cone; 105. Vibration motor;

[0033] 200. Barium sulfate dry material drop control assembly; 201. Drop control electric cylinder; 202. Closed material retaining ring;

[0034] 300, barium sulfate block crushing component; 301, upper grinding plate; 302, lower grinding plate; 303, barium sulfate powder screen; 304, grinding cylinder;

[0035] 400, grinding drive mechanism; 401, drive motor; 402, reciprocating screw;

[0036] 500. Barium sulfate powder blowing-off parts; 501. High-pressure nozzle. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1, please refer to Figures 1 to 5 , an auxiliary drying equipment of a dryer for barium sulfate production, including an auxiliary drying chamber 2, a barium sulfate heating and drying component 100 and a barium sulfate block crushing component 300.

[0039] See also Figure 2 The auxiliary drying chamber 2 is connected to the top of the barium sulfate disc dryer 1 through a drop pipe. The top of the auxiliary drying chamber 2 is connected to a feed hopper 3 for adding barium sulfate wet material into the auxiliary drying chamber 2. The barium sulfate wet material is pre-dried and crushed inside the auxiliary drying chamber 2, and then falls into the barium sulfate disc dryer 1 through the drop pipe for further drying. The drying effect is better than that of the existing dryer.

[0040] See also Figure 4 and Figure 5The barium sulfate heating and drying component 100 includes a conical sliding cover 101 and an electric heater 102. The conical sliding cover 101 is installed inside the auxiliary drying chamber 2 through a plurality of support columns 5, and a gap is left between the bottom of the conical sliding cover 101 and the inner wall of the auxiliary drying chamber 2. The auxiliary drying chamber 2 is equipped with a barium sulfate dry material falling control component 200 for opening and closing the gap between the bottom of the conical sliding cover 101 and the inner wall of the auxiliary drying chamber 2. The electric heater 102 is installed inside the conical sliding cover 101 through a mounting bracket. The feed hopper 3 is located directly above the center of the conical sliding cover 101. The outer wall of the conical sliding cover 101 is equipped with a plurality of blocking pieces 103, and the plurality of blocking pieces 103 are combined into approximately a plurality of concentric notches. The barium sulfate wet material is annular, and the gaps between two adjacent rings are staggered to slow down the falling speed of the barium sulfate wet material so that the barium sulfate wet material can be fully dried. A blanking cone 104 is installed on the top of the conical sliding cover 101, and a vibration motor 105 is installed inside the blanking cone 104. The barium sulfate wet material is added to the interior of the auxiliary drying chamber 2 from the feed hopper 3, and the barium sulfate wet material is preliminarily separated by the blanking cone 104, and the barium sulfate wet material slides along the conical blanking cover. Under the action of the vibration motor 105, the blanking cone 104 and the conical sliding cover 101 are driven to vibrate together to assist the barium sulfate material to slide. During the sliding process, the baffle plate blocks the barium sulfate wet material, thereby increasing the time the barium sulfate wet material is on the conical sliding cover 101 and ensuring the drying effect of the barium sulfate wet material;

[0041] The barium sulfate dry material drop control assembly 200 includes a drop control electric cylinder 201 and a closed material retaining ring 202. The drop control electric cylinder 201 is installed on the top of the auxiliary drying chamber 2. The closed material retaining ring 202 is in sealed sliding cooperation with the inner wall of the auxiliary drying chamber 2 and the bottom of the conical sliding cover 101.

[0042] The closed material retaining ring 202 can be driven to rise and fall by the drop control electric cylinder 201. When the closed material retaining ring 202 is at a higher position, the barium sulfate dry material can fall from the gap between the bottom of the conical sliding cover 101 and the inner wall of the auxiliary drying chamber 2. When the drop control electric cylinder 201 drives the closed material retaining ring 202 to drop to contact the bottom of the conical sliding cover 101, the barium sulfate material on the top of the conical sliding cover 101 is blocked, so that the barium sulfate material can be fully dried.

[0043] See also Figure 4 and Figure 5The barium sulfate block crushing component 300 includes an upper grinding plate 301, a lower grinding plate 302 and a barium sulfate powder screen 303. A grinding cylinder 304 is installed inside the auxiliary drying chamber 2, and the barium sulfate powder screen 303 is installed inside the grinding cylinder 304. The upper grinding plate 301 and the lower grinding plate 302 are both slidably matched with the grinding cylinder 304. The top edge of the inner wall of the grinding cylinder 304 is chamfered. The barium sulfate powder screen 303 is located in the middle of the upper grinding plate 301 and the lower grinding plate 302, and the areas of the upper grinding plate 301, the lower grinding plate 302 and the barium sulfate powder screen 303 are equal. A grinding drive mechanism 400 for driving the upper grinding plate 301 and the lower grinding plate 302 to move back and forth relative to each other is installed inside the auxiliary drying chamber 2;

[0044] The grinding drive mechanism 400 includes a drive motor 401 and two connected reciprocating screws 402. The drive motor 401 is installed inside the auxiliary drying chamber 2. The upper grinding plate 301 and the lower grinding plate 302 are respectively equipped with nuts that match the corresponding reciprocating screws 402. The reciprocating screws 402 are fixedly installed at the output end of the drive motor 401. The top end of the reciprocating screw 402 is in rotational engagement with the tapered slide cover 101.

[0045] The two reciprocating screws 402 can be driven to rotate by the driving motor 401. The upper grinding plate 301 and the lower grinding plate 302 are symmetrically arranged relative to the barium sulfate powder screen 303. The two reciprocating screws 402 rotate synchronously, so that the upper grinding plate 301 and the lower grinding plate 302 are close to or away from each other. Initially, the upper grinding plate 301 and the lower grinding plate 302 are in a state of being away from each other. At this time, the closed retaining ring 202 is in a higher position, and the upper grinding plate 301 is close to the bottom of the conical sliding cover 101. The barium sulfate dry material falls from the gap between the conical sliding cover 101 and the inner wall of the auxiliary drying chamber 2. After a certain period of time, the falling material reaches a certain amount. In this process, the barium sulfate with smaller particle size The powder falls directly through the barium sulfate powder screen 303, and the falling control electric cylinder 201 drives the closed material blocking ring 202 to descend to block the barium sulfate material. The driving motor 401 drives the upper grinding plate 301 and the lower grinding plate 302 to approach each other. In the process of the upper grinding plate 301 and the lower grinding plate 302 approaching the barium sulfate powder screen 303, the upper grinding plate 301 and the lower grinding plate 302 and the barium sulfate powder screen 303 cooperate to crush the blocky barium sulfate dry material, and then the upper grinding plate 301 and the lower grinding plate 302 contact the barium sulfate powder screen 303 and move away from each other. At this time, the barium sulfate dry material powder passes through the barium sulfate powder screen 303 and falls on the surface of the lower grinding plate 302.

[0046] It should be noted that a motor mounting plate is installed on the inner wall of the auxiliary drying chamber 2 through a plurality of mounting columns 4, and the drive motor 401 is installed on the motor mounting plate. The mounting columns 4 and the support columns 5 are both triangular prisms, and one of the corner edges of the mounting columns 4 and the support columns 5 is facing upward. The barium sulfate material can slide down through the surface of the mounting columns 4 and the support columns 5, thereby avoiding the accumulation of the barium sulfate material.

[0047] Example 2, please refer to Figures 1 to 3 , an auxiliary drying device for a dryer for barium sulfate production, further comprising a barium sulfate powder blowing-off component 500, which comprises a plurality of high-pressure nozzles 501, which are mounted on the side wall of the auxiliary drying chamber 2, and the plurality of high-pressure nozzles 501 are interconnected, with the air outlet of the high-pressure nozzle 501 facing the top surface of the lower grinding plate 302 when the lower grinding plate 302 is in the lowest position, and the high-pressure nozzle 501 is connected to an external air supply device for blowing off the barium sulfate powder on the surface of the lower grinding plate 302, and a plurality of blowing nozzles 6 are mounted on the side wall of the auxiliary drying chamber 2, and the plurality of blowing nozzles 6 are connected by connecting pipes 7 is connected, and the connecting pipe 7 is connected to the high-pressure nozzle 501, the air outlet of the blowing nozzle 6 is toward the side wall of the conical sliding cover 101, and the gas can be delivered to the blowing nozzle 6 and the high-pressure nozzle 501 through the external air supply equipment. The barium sulfate wet material on the surface of the conical sliding cover 101 blocked by the retaining ring can be blown off by the blowing nozzle 6, and the hot air flow in the auxiliary drying chamber 2 can be accelerated, and the drying efficiency of the barium sulfate wet material can be further accelerated. The high-pressure nozzle 501 can assist in blowing the barium sulfate powder on the surface of the lower grinding plate 302 to the inside of the barium sulfate disc dryer 1 when the lower grinding plate 302 is in the lowest position.

[0048] See also Figures 1 to 3A preheating box 8 is installed on the periphery of the auxiliary drying chamber 2. The preheating box 8 is connected to the air supply pipe 9. The preheating box 8 is connected to the high-pressure nozzle 501 and the blowing nozzle 6. A waste heat recovery pipe 10 is provided inside the preheating box 8. The waste heat recovery pipe 10 is connected to the hot air pipe inside the barium sulfate disc dryer 1 through a connector. The waste heat recovery pipe 10 is arranged in a serpentine shape inside the preheating box 8, and a plurality of heat dissipation fins 11 are provided on the periphery of the waste heat recovery pipe 10. The waste heat recovery pipe 10 passes through the preheating box 8 and extends to the outside. The barium sulfate disc dryer 1 is a multi-layer fixed hollow heating circular loading tray, rotary rake stirring, vertical continuous drying equipment mainly based on heat conduction, which is developed on the basis of the intermittent stirring conduction dryer and integrates a series of advanced technologies. This drying process is to pass the heat carrier into each layer of hollow discs, indirectly heat the wet material placed on the disc surface by heat conduction, and under the scraping action of the rotating rakes, the moisture in the continuously moving and tumbling material evaporates at the operating temperature, and the steam is discharged with the equipment exhaust, so that qualified dried products are continuously obtained at the bottom of the equipment. The steam and equipment exhaust contain residual heat. The air supply pipe 9 is connected to the external air supply device, and the external air supply device sends the gas into the preheating box 8. The steam generated by the barium sulfate disc dryer 1 and the equipment exhaust are passed into the waste heat recovery pipe 10 to preheat the gas inside the preheating box 8. At the same time, the heating effect of the gas is improved by the heat dissipation fins 11, further improving the utilization rate of the waste heat of the barium sulfate disc dryer 1.

[0049] It should be noted that the inner wall of the auxiliary drying chamber 2 is fixedly connected to a plurality of rotating seats, and a rotating cover plate 12 is rotatably installed at the bottom of the rotating seat. The plurality of rotating cover plates 12 are respectively located at the air outlets of the corresponding high-pressure nozzles 501. When the high-pressure nozzles 501 are not blowing air, the high-pressure nozzles 501 are closed. At the same time, when the high-pressure nozzles 501 are spraying air, the rotating cover plates 12 are driven to rotate upward. At the same time, the rotating cover plates 12 block and limit the air outlet of the high-pressure nozzles 501, so that the air is blown downward and the barium sulfate powder on the lower grinding plate 302 is blown off.

[0050] The connector adopts a detachable structure and can be connected to the waste heat recovery pipe 10 using a flange, so that the waste heat recovery pipe 10 and the barium sulfate disc dryer 1 can be separated when the top cover of the barium sulfate disc dryer 1 is disassembled.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary drying device for a dryer for barium sulfate production, characterized in that: include: An auxiliary drying chamber (2), the auxiliary drying chamber (2) being connected to the top of the barium sulfate disc dryer (1) via a drop pipe, and the top of the auxiliary drying chamber (2) being connected to a feed hopper (3); A barium sulfate heating and drying component (100), the barium sulfate heating and drying component (100) comprising a conical sliding cover (101) and an electric heater (102), the conical sliding cover (101) being mounted inside the auxiliary drying chamber (2), the electric heater (102) being mounted inside the conical sliding cover (101), a barium sulfate dry material drop control assembly (200) being mounted inside the auxiliary drying chamber (2) for opening and closing the gap between the bottom of the conical sliding cover (101) and the inner wall of the auxiliary drying chamber (2), the barium sulfate dry material drop control assembly (200) comprising a drop control electric cylinder (201) and a closed material blocking ring (202), the drop control electric cylinder (201) being mounted on the top of the auxiliary drying chamber (2), the closed material blocking ring (202) and the inner wall of the auxiliary drying chamber (2) and the bottom of the conical sliding cover (101) being in sealed sliding engagement; The barium sulfate block crushing component (300) comprises an upper grinding plate (301), a lower grinding plate (302) and a barium sulfate powder screen (303); a grinding cylinder (304) is installed inside the auxiliary drying chamber (2); the barium sulfate powder screen (303) is installed inside the grinding cylinder (304); the upper grinding plate (301) and the lower grinding plate (302) are both in sliding cooperation with the grinding cylinder (304); the barium sulfate powder screen (303) is located in the middle of the upper grinding plate (301) and the lower grinding plate (302); the auxiliary drying chamber (2) is installed inside. A grinding drive mechanism (400) is provided for driving the upper grinding plate (301) and the lower grinding plate (302) to move back and forth relative to each other. The grinding drive mechanism (400) includes a driving motor (401) and two connected reciprocating screws (402). The driving motor (401) is installed inside the auxiliary drying chamber (2). The upper grinding plate (301) and the lower grinding plate (302) are respectively equipped with nuts that match the corresponding reciprocating screws (402). The reciprocating screws (402) are fixedly installed at the output end of the driving motor (401). The top end of the reciprocating screw (402) is in rotational engagement with the conical sliding cover (101). a barium sulfate powder blowing-off component (500), the barium sulfate powder blowing-off component (500) being used to blow off the barium sulfate powder on the surface of the lower grinding plate (302), the barium sulfate powder blowing-off component (500) comprising a plurality of high-pressure nozzles (501); A plurality of blowing nozzles (6) are installed on the side wall of the auxiliary drying chamber (2), the plurality of blowing nozzles (6) are connected to each other via a connecting pipe (7), and the connecting pipe (7) is connected to the barium sulfate powder blowing-off component (500); A preheating box (8) is installed on the periphery of the auxiliary drying chamber (2), and the preheating box (8) is connected to an air supply pipe (9). The preheating box (8) is connected to the high-pressure nozzle (501) and the blowing nozzle (6). A waste heat recovery pipe (10) is provided inside the preheating box (8), and the waste heat recovery pipe (10) is connected to the hot air pipe inside the barium sulfate disc dryer (1) through a connector. The waste heat recovery pipe (10) passes through the preheating box (8) and extends to the outside.

2. The auxiliary drying equipment of the dryer for barium sulfate production according to claim 1, characterized in that: The waste heat recovery pipe (10) is arranged in a serpentine shape inside the preheating box (8), and a plurality of heat dissipation fins (11) are provided on the periphery of the waste heat recovery pipe (10).

3. The auxiliary drying equipment of the dryer for barium sulfate production according to claim 2, characterized in that: A blanking cone (104) is installed on the top of the conical sliding cover (101), and a vibration motor (105) is installed inside the blanking cone (104).

4. The auxiliary drying equipment of the dryer for barium sulfate production according to claim 3, characterized in that: A motor mounting plate is mounted on the inner wall of the auxiliary drying chamber (2) via a plurality of mounting columns (4), the drive motor (401) is mounted on the motor mounting plate, the mounting columns (4) are triangular prism-shaped, and one corner edge of the mounting columns (4) faces upward.

5. The auxiliary drying equipment of the dryer for barium sulfate production according to claim 4, characterized in that: The feed hopper (3) is located directly above the center of the conical sliding cover (101). The outer side wall of the conical sliding cover (101) is provided with a plurality of blocking pieces (103) for slowing down the falling speed of the wet barium sulfate material so as to fully dry the wet barium sulfate material.

6. The auxiliary drying equipment of the dryer for barium sulfate production according to claim 5, characterized in that: The top edge of the inner wall of the grinding cylinder (304) is provided with a chamfer.

7. The auxiliary drying equipment of the dryer for barium sulfate production according to claim 6, characterized in that: A plurality of rotating seats are fixedly connected to the inner wall of the auxiliary drying chamber (2), and a rotating cover plate (12) is rotatably mounted on the bottom of the rotating seat. The plurality of rotating cover plates (12) are respectively located at the air outlets of corresponding high-pressure nozzles (501).

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