Furnace slag recycling equipment for zinc oxide production

Abstract

The invention belongs to the technical field of slag recycling, and particularly relates to zinc oxide production slag recycling equipment which comprises a feeding base and a discharging box device, the feeding base and the discharging box device are arranged in a left-right corresponding mode, and a cooling cylinder device is rotationally connected between the feeding base and the discharging box device. A cooling cylinder device is arranged on the feeding base, a conveying shaft device is rotationally connected into the cooling cylinder device, a cooling water tank device is arranged in the middle of the cooling cylinder device, a feeding box is arranged on the feeding base, and a screening device and a smashing device are arranged in the feeding box in a staggered mode; the screening device and the smashing device are arranged in the feeding box, slag is screened and smashed, slag particles entering the cooling cylinder device are fine and uniform, slag caking is avoided, the cooling cylinder device is matched with the conveying shaft device, the rotating speed of the conveying shaft device is higher than that of the cooling cylinder device, and when the slag passes through the cooling cylinder device, the heat exchange efficiency is improved; and the cooling efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of slag recovery, and in particular relates to slag recovery equipment for zinc oxide production. Background Art

[0002] Zinc oxide is a commonly used chemical additive, widely used in the production of plastics, silicate products, synthetic rubber, lubricants, paints, ointments, adhesives, foods, batteries, flame retardants and other products. Rotary kilns are often used in the production of zinc oxide, and the raw materials are calcined in rotary kilns. In the rotary kiln calcination and smelting process, after the materials entering the rotary kiln undergo enrichment reactions in the rotary kiln, part of them flows out of the rotary kiln with the flue gas, and the remaining part becomes kiln slag and is directly discharged from the rotary kiln. These slags have a high temperature, high sensible heat, and high heat. Slag can be used as raw materials for cement plants and building materials plants. In the existing rotary kiln calcination system, the slag is mostly cooled by directly sprinkling water on the material, and the large amount of heat contained is not effectively recycled, resulting in huge energy consumption and waste.

[0003] The Chinese patent with the publication number CN218155577U discloses a waste heat recovery system for zinc smelting slag from a rotary kiln, comprising a furnace body, wherein the two sides of the furnace body are respectively a feeding area and a discharging area, a loading and moving device is horizontally arranged in the furnace body, a slag pot is arranged on the loading and moving device, an air inlet and an air outlet are provided on the furnace body, and the air supply path connected in a straight line between the air inlet and the air outlet is perpendicular to the moving direction of the loading and moving device and passes through the loading and moving device, the internal space of the furnace body between the air inlet and the air outlet forms a heat exchange area, and the air outlet is externally connected to an air-to-air heat exchanger. The device uses circulating air to cool the high-temperature slag, and the turbid air mixed with particulate matter discharged from the air outlet is returned to the furnace body again through the circulating fan to be used for cooling the high-temperature slag, thereby avoiding the problem of further pollution caused by direct discharge of turbid air. However, the device uses air cooling to cool the slag. Due to the limitation of heat transfer method, the cooling speed of the slag is low, which greatly reduces the cooling recovery efficiency. A large amount of contaminated gas is generated during cooling. Although a treatment device is set up, this also increases the cost of recycling and treatment. In addition, there is a lack of screening device during slag cooling and recovery, and the agglomeration of slag during cooling will inevitably limit the cooling recovery efficiency. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide a slag recycling device for zinc oxide production, which uses water cooling and isolates the water cooling medium and the slag to improve the cooling efficiency while avoiding the production of harmful substances, thereby effectively solving the problems of poor grinding effect and low work efficiency in the prior art.

[0005] To achieve the above purpose, the specific technical solutions of the present invention are as follows: A slag recycling device for zinc oxide production comprises a feeding base and a discharge box device, the feeding base and the discharge box device are arranged correspondingly on the left and right, a cooling cylinder device is rotatably connected between the feeding base and the discharge box device, a conveying shaft device is rotatably connected in the cooling cylinder device, a cooling water tank device is arranged in the middle position of the cooling cylinder device, a feeding box is arranged on the feeding base, a screening device and a crushing device are staggered in the feeding box, after the slag is screened by the screening device, the agglomerated slag falls into the crushing device, the slag enters the cooling cylinder device after being processed, the cooling cylinder device and the conveying shaft device cooperate with each other to transport the slag, and the slag is cooled by the cooling water tank device while realizing heat recovery.

[0006] As a further configuration of the above scheme, the screening device includes a screening box, which is fixedly mounted on one side of the upper end of the feeding box. A screening inclined plate is arranged in the screening box, a vertically upward material baffle plate is arranged at the obliquely downward end of the screening inclined plate, a lifting plate is arranged on the material baffle plate, and a lifting device is arranged on the upper end of the material baffle plate. A vibration device is arranged on one side of the screening box, and the vibration device abuts against the screening inclined plate.

[0007] As a further arrangement of the above scheme, the screening inclined plate is provided with screen slots distributed in an array, the upper end surface of the screening inclined plate is provided with horizontal material blocking cross plates parallel to each other, the material blocking cross plates are located between the screen slots, the lower end surface of the material blocking cross plates is provided with vertical downward vibrating vertical columns, the vibrating device is provided with vibrating columns, and the vibrating columns are abutted against the vibrating vertical columns.

[0008] As a further configuration of the above scheme, a leakage trough is provided at the lower end of the material baffle plate, and the leakage trough is vertically slidably connected to the lifting plate. A guide plate is provided at the upper end of the lifting plate, and the upper end of the guide plate is connected to the lifting device.

[0009] As a further configuration of the above scheme, the crushing device includes crushing rollers, which are horizontally arranged and staggeredly connected, and are rotatably connected in a feeding box. The intersection of the two crushing rollers is located directly below the screening device. The crushing rollers are connected to a driving motor, and the driving motor drives one crushing roller to rotate and drives the other crushing roller to rotate. The agglomerated slag falls between the two crushing rollers to achieve crushing of the slag.

[0010] As a further configuration of the above scheme, the cooling cylinder device includes a cooling cylinder, a heat-conducting circular tube device is arranged in a linear array inside the cooling cylinder, the heat-conducting circular tube device is connected to the outer wall of the cooling cylinder, a feeding shaft cylinder is arranged at the left end of the cooling cylinder, feeding grooves are evenly opened on the feeding shaft cylinder, the feeding shaft cylinder is located in the loading box, a sealing circular plate is arranged at the connection between the feeding shaft cylinder and the cooling cylinder, a discharging shaft cylinder is arranged at the right end of the cooling cylinder, discharging grooves are evenly opened on the discharging shaft cylinder, the discharging shaft cylinder is located in the discharging box device, and a sealing circular plate is arranged at the connection between the discharging shaft cylinder and the cooling cylinder.

[0011] As a further configuration of the above scheme, the heat-conducting circular tube device includes a heat-conducting circular tube, and vertical heat-conducting vertical tubes are arranged at the upper and lower ends of the heat-conducting circular tube. The heat-conducting circular tube is connected to the heat-conducting vertical tube, and the heat-conducting vertical tube is connected to the outer wall of the cooling tube.

[0012] As a further configuration of the above scheme, the conveying shaft device includes a conveying shaft, which is rotatably connected to the cooling cylinder device. A conveying auger is provided at the left end of the conveying shaft, and the conveying auger is located in the feeding shaft cylinder. A fixed column is provided at the right end of the conveying shaft, and a scraper plate is fixedly connected to the outer end of the fixed column. The scraper plate is slidably connected to the inner wall of the discharge shaft cylinder, and the conveying shaft passes through the heat-conducting circular tube device.

[0013] As a further configuration of the above scheme, the cooling water tank device includes a water tank base, on which a cooling water tank cylinder is fixedly arranged, the cooling water tank cylinder is coaxial with the cooling cylinder, the left and right end surfaces of the cooling water tank cylinder are slidingly connected to the sealing circular plate for sealing, the inner wall of the cooling water tank cylinder is symmetrically provided with partitions, the partitions are in sliding contact with the outer wall of the cooling cylinder, the upper end of the cooling water tank cylinder is provided with a water adding device, and the lower end of the cooling water tank cylinder is provided with a water outlet.

[0014] Beneficial effects of the present invention: By setting a screening device and a crushing device in the feeding box, the slag is screened by the screening device, and the agglomerated slag falls into the crushing device. After the slag is crushed, the slag particles entering the cooling tube device are fine and uniform, avoiding slag agglomeration, thereby greatly improving the heat exchange efficiency.

[0015] The slag enters the cooling cylinder device, and the cooling cylinder device and the conveying shaft device rotate in the same direction. The speed of the conveying shaft device is faster than that of the cooling cylinder device. The conveying shaft device drives the conveying auger to rotate, and the conveying auger drives the slag to be transported from left to right in the cooling cylinder device. The rotation of the cooling cylinder device also makes it more convenient to transport the slag. When the slag passes through the cooling cylinder, it exchanges heat with the cooling water in the cooling water tank device on the outer wall of the cooling cylinder. Water is added to the cooling water tank cylinder through the water adding device, and the cooling water flows through the cooling cylinder through the heat-conducting circular pipe device to improve the cooling efficiency.

[0016] Since the cooling cylinder is arranged horizontally, the temperature of the water at the lower end of the cooling water tank cylinder is higher than that at the upper end. The water at the upper end of the cooling water tank cylinder is divided into two cooling areas by setting a partition inside the cooling water tank cylinder and cooperating with the cooling cylinder, thereby avoiding uneven heat exchange and further improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional schematic diagram of the present invention; Figure 2 It is a schematic diagram of the appearance of the present invention; Figure 3 It is a front view of the present invention; Figure 4 It is a schematic axonometric diagram of the EE-direction cross section of the present invention; Figure 5 It is a schematic diagram of the screening and crushing mechanism of the present invention; Figure 6 It is a DD-direction cross-sectional schematic diagram of the present invention; Figure 7 It is a schematic diagram of a cooling water tank device of the present invention; Figure 8 It is a schematic diagram of the cooling cylinder device of the present invention; Fig. 9 It is a cross-sectional schematic diagram of the cooling cylinder device of the present invention; Fig.10 It is a schematic diagram of the conveying shaft device of the present invention.

[0018] Feeding base; 2. Discharging box device; 3. Feeding box; 4. Screening device; 5. Crushing device; 6. Cooling cylinder device; 7. Conveying shaft device; 8. Cooling water tank device; 401. Screening box; 402. Screening inclined plate; 4021. Screen slot; 4022. Baffle plate; 4023. Vibrating vertical column; 403. Baffle plate; 4031. Leakage trough; 404. Lifting plate; 4041. Guide plate; 405. Lifting device; 406. Vibrating device; 4061. Vibrating column; 501. Crushing roller ; 502, driving motor; 601, cooling cylinder; 6011, sealing circular plate; 602, heat-conducting circular tube device; 6021, heat-conducting vertical tube; 6022, heat-conducting circular tube; 603, feeding shaft cylinder; 6031, feeding trough; 604, discharging shaft cylinder; 6041, discharging trough; 701, conveying shaft; 702, conveying auger; 703, fixing column; 7031, scraper plate; 801, water tank base; 802, cooling water tank cylinder; 803, partition; 804, water adding device; 805, water outlet. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 10 The present application is described in detail with reference to embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment discloses a slag recycling device for zinc oxide production, wherein a feeding base 1 and a discharge box device 2 are arranged correspondingly on the left and right, a cooling cylinder device 6 is rotatably connected between the feeding base 1 and the discharge box device 2, a conveying shaft device 7 is rotatably connected in the cooling cylinder device 6, a cooling water tank device 8 is arranged in the middle position of the cooling cylinder device 6, a feeding box 3 is arranged on the feeding base 1, a screening device 4 and a crushing device 5 are staggered in the feeding box 3, after the slag is screened by the screening device 4, the agglomerated slag falls into the crushing device 5, and the slag enters the cooling cylinder device 6 after being processed, the cooling cylinder device 6 and the conveying shaft device 7 cooperate with each other to transport the slag, and the slag is cooled by the cooling water tank device 8 while realizing heat recovery.

[0022] like Figure 4 , Figure 5 As shown, the screening device 4 includes a screening box 401, which is fixedly mounted on one side of the upper end of the feeding box 3, and a screening inclined plate 402 is arranged in the screening box 401, and a vertically upward material blocking plate 403 is arranged at the obliquely downward end of the screening inclined plate 402, and a lifting plate 404 is arranged on the material blocking plate 403, and a lifting device 405 is arranged on the upper end of the material blocking plate 404, and a vibration device 406 is arranged on one side of the screening box 401, and the vibration device 406 is in contact with the screening inclined plate 402; the screening inclined plate 402 is provided with an array of screening slots 4021, and the screening inclined plate 402 The upper end surface is provided with a horizontal material blocking cross plate 4022 which is parallel to each other, and the material blocking cross plate 4022 is located between the screen slots 4021. The lower end surface of the material blocking cross plate 402 is provided with a vertical downward vibration column 4023. The vibration device 406 is provided with a vibration column 4061, and the vibration column 401 abuts against the vibration column 4023. The lower end of the material blocking plate 403 is provided with a leakage trough 4031, and the leakage trough 4031 is vertically slidably connected with the lifting plate 403. The upper end of the lifting plate 403 is provided with a guide plate 4031, and the upper end of the guide plate 4031 is connected to the lifting device 405.

[0023] The crushing device 5 includes crushing rollers 501, which are horizontally arranged and staggeredly connected. The crushing rollers 501 are rotatably connected in the feeding box 3. The staggered part of the two crushing rollers 501 is located directly below the screening device 4. The crushing rollers 501 are connected to the driving motor 502. The driving motor 502 drives one crushing roller 501 to rotate, and drives the other crushing roller 501 to rotate. The agglomerated slag falls between the two crushing rollers 501 to achieve the crushing of the slag.

[0024] like Figure 8 , Fig. 9 As shown, the cooling cylinder device 6 includes a cooling cylinder 601, a heat-conducting round tube device 602 is arranged in a linear array in the cooling cylinder 601, and the heat-conducting round tube device 602 is connected to the outer wall of the cooling cylinder 601, a feeding shaft cylinder 603 is arranged at the left end of the cooling cylinder 601, and a feeding groove 6031 is evenly opened on the feeding shaft cylinder 603, and the feeding shaft cylinder 603 is located in the feeding box 3, and a sealing circular plate 6011 is arranged at the connection between the feeding shaft cylinder 603 and the cooling cylinder 601, and a The discharge shaft cylinder 604 has discharge grooves 6041 evenly formed on it. The discharge shaft cylinder 604 is located in the discharge box device 2. A sealing circular plate 6011 is provided at the connection between the discharge shaft cylinder 604 and the cooling cylinder 601. The heat-conducting circular tube device 602 includes a heat-conducting circular tube 6022. Vertical heat-conducting vertical tubes 6021 are provided at the upper and lower ends of the heat-conducting circular tube 6022. The heat-conducting circular tube 6022 is connected to the heat-conducting vertical tube 6021, and the heat-conducting vertical tube 6021 is connected to the outer wall of the cooling cylinder 601.

[0025] like Fig.10 As shown, the conveying shaft device 7 includes a conveying shaft 701, which is rotatably connected to the cooling cylinder device 6. A conveying auger 702 is arranged at the left end of the conveying shaft 701, and the conveying auger 702 is located in the feeding shaft cylinder 603. A fixed column 703 is arranged at the right end of the conveying shaft 701. A scraper plate 7031 is fixedly connected to the outer end of the fixed column 703. The scraper plate 7031 is slidably connected to the inner wall of the discharge shaft cylinder 604, and the conveying shaft 701 passes through the heat-conducting circular tube device 602.

[0026] like Figure 6 , Figure 7 As shown, the cooling water tank device 8 includes a water tank base 801, on which a cooling water tank barrel 802 is fixedly arranged. The cooling water tank barrel 802 is coaxial with the cooling barrel 601, and the left and right end surfaces of the cooling water tank barrel 802 are slidingly connected with the sealing circular plate 6011 in a sealed manner. The inner wall of the cooling water tank barrel 802 is symmetrically provided with partitions 803, and the partitions 803 are in sliding contact with the outer wall of the cooling barrel 601. A water adding device 804 is provided at the upper end of the cooling water tank barrel 802, and a water outlet 805 is provided at the lower end of the cooling water tank barrel 802.

[0027] The working process of the present invention is as follows: the slag is poured into the screening box 401, the vibrating device 406 drives the screening inclined plate 402 to vibrate through the vibrating column 4061, the small particles of unagglomerated slag pass through the screening slot 4021 and fall into the lower end of the feeding box 3, the agglomerated slag remains in the screening box 401, the lifting device 405 is started, the lifting device 405 drives the lifting plate 404 through the guide plate 4041, the agglomerated slag leaks out of the screening box 401 through the leakage slot 4031, the driving motor 502 drives one crushing roller 501 to rotate, drives the other crushing roller 501 to rotate, the agglomerated slag falls between the two crushing rollers 501, and the slag is crushed. After screening and crushing, the slag falls into the lower end of the feeding box 3 and contacts with the feeding shaft cylinder 603; the feeding shaft cylinder 603 rotates, the slag passes through the feeding slot 6031 and falls into the feeding shaft cylinder 603, the cooling cylinder device 6 and the conveying shaft device 7 are simultaneously The conveying shaft device 7 rotates in the direction of rotation, and the speed of the conveying shaft device 7 is faster than that of the cooling cylinder device 6. The conveying shaft 701 drives the conveying auger 702 to rotate, and the conveying auger 702 drives the slag to be transported from left to right in the feeding shaft cylinder 603. The slag enters the cooling cylinder 601 under the action of the conveying auger 702, and the cooling cylinder 601 rotates. The slag is transported in the cooling cylinder 601 and exchanges heat with the cooling water in the cooling water tank cylinder 802 on the outer wall of the cooling cylinder 601. At the same time, water is added to the cooling water tank cylinder 802 through the water adding device 804. The cooling water is pressurized and flows through the cooling cylinder 601 through the heat-conducting circular pipe 6022 and the heat-conducting vertical pipe 6021 to improve the cooling efficiency. After the slag is cooled, it enters the discharging shaft cylinder 604, and the conveying shaft 701 drives the scraper plate 7031 to rotate through the fixed column 703. The scraper plate 7031 drives the slag to pass through the discharging trough 6041 to avoid slag blockage. The slag is finally discharged from the discharging box device 2.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A slag recycling device for zinc oxide production, comprising a feeding base and a discharge box device, wherein the feeding base and the discharge box device are arranged correspondingly on the left and right, and characterized in that: A cooling cylinder device is rotatably connected between the feeding base and the discharge box device, a conveying shaft device is rotatably connected inside the cooling cylinder device, a cooling water tank device is arranged in the middle of the cooling cylinder device, a feeding box is arranged on the feeding base, and a screening device and a crushing device are staggered inside the feeding box.

2. The slag recycling equipment for zinc oxide production according to claim 1, characterized in that: The screening device includes a screening box, which is fixedly installed on one side of the upper end of the feeding box. A screening inclined plate is arranged in the screening box, a vertically upward material baffle plate is arranged at the oblique downward end of the screening inclined plate, a lifting plate is arranged on the material baffle plate, and a lifting device is arranged at the upper end of the material baffle plate. A vibration device is arranged on one side of the screening box, and the vibration device abuts against the screening inclined plate.

3. The slag recycling equipment for zinc oxide production according to claim 2, characterized in that: The screening inclined plate is provided with screening slots distributed in an array, the upper end surface of the screening inclined plate is provided with parallel horizontal material blocking cross plates, the material blocking cross plates are located between the screening slots, the lower end surface of the material blocking cross plates is provided with vertical downward vibrating vertical columns, the vibrating device is provided with vibrating columns, and the vibrating columns are abutted against the vibrating vertical columns.

4. The slag recycling equipment for zinc oxide production according to claim 2, characterized in that: The lower end of the material blocking plate is provided with a material leakage groove, and the material leakage groove is vertically slidably connected with the lifting plate. The upper end of the lifting plate is provided with a guide plate, and the upper end of the guide plate is connected with the lifting device.

5. The slag recycling equipment for zinc oxide production according to claim 1, characterized in that: The pulverizing device comprises pulverizing rollers, which are arranged horizontally and staggeredly connected, the pulverizing rollers are rotatably connected in the feeding box, the staggered part of the two pulverizing rollers is located directly below the screening device, and the pulverizing rollers are connected to the driving motor.

6. The slag recycling equipment for zinc oxide production according to claim 1, characterized in that: The cooling cylinder device includes a cooling cylinder, a heat-conducting circular tube device is arranged in a linear array inside the cooling cylinder, a feeding shaft cylinder is arranged at the left end of the cooling cylinder, feeding grooves are evenly opened on the feeding shaft cylinder, the feeding shaft cylinder is located in the loading box, a sealing circular plate is arranged at the connection between the feeding shaft cylinder and the cooling cylinder, a discharging shaft cylinder is arranged at the right end of the cooling cylinder, discharging grooves are evenly opened on the discharging shaft cylinder, the discharging shaft cylinder is located in the discharging box device, and a sealing circular plate is arranged at the connection between the discharging shaft cylinder and the cooling cylinder.

7. The slag recycling equipment for zinc oxide production according to claim 6, characterized in that: The heat-conducting round tube device comprises a heat-conducting round tube, and vertical heat-conducting vertical tubes are arranged at the upper and lower ends of the heat-conducting round tube. The heat-conducting round tube is connected with the heat-conducting vertical tube, and the heat-conducting vertical tube is connected with the outer wall of the cooling tube.

8. The slag recycling equipment for zinc oxide production according to claim 1, characterized in that: The conveying shaft device includes a conveying shaft, which is rotatably connected to the cooling cylinder device. A conveying auger is arranged at the left end of the conveying shaft, and the conveying auger is located in the feeding shaft cylinder. A fixed column is arranged at the right end of the conveying shaft, and a scraper plate is fixedly connected to the outer end of the fixed column. The scraper plate is slidably connected to the inner wall of the discharge shaft cylinder, and the conveying shaft passes through the heat-conducting circular tube device.

9. The slag recycling equipment for zinc oxide production according to claim 1, characterized in that: The cooling water tank device includes a water tank base, on which a cooling water tank cylinder is fixedly arranged. The cooling water tank cylinder is coaxial with the cooling cylinder. The left and right end surfaces of the cooling water tank cylinder are slidingly connected to a sealing circular plate for sealing. Partitions are symmetrically arranged on the inner wall of the cooling water tank cylinder. The partitions are in sliding contact with the outer wall of the cooling cylinder. A water adding device is arranged at the upper end of the cooling water tank cylinder, and a water outlet is arranged at the lower end of the cooling water tank cylinder.

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