Zinc oxide waste heat drying equipment

Abstract

The zinc oxide waste heat drying equipment comprises a calcining furnace discharging bin, a plurality of conveying pipes are arranged in the calcining furnace discharging bin in a penetrating mode, conveying structures are arranged in the conveying pipes, the side walls of one ends of the multiple conveying pipes are connected in series through connecting pipes, and a feeding auger is installed at the starting ends of the multiple conveying pipes connected in series; a discharging auger is installed at the discharging position of the conveying pipes connected in series, one ends of the conveying pipes are jointly connected with an air outlet box, the other ends of the conveying pipes are jointly connected with an air inlet box, the two ends of the conveying pipes communicate with the air outlet box and the air inlet box correspondingly, the air outlet box is provided with an air outlet unit, and the air inlet box is provided with an air inlet unit. According to the method, the washed zinc oxide raw material is dried through waste heat, the drying efficiency is high, waste heat waste in the calcining stage can be reduced, the cooling efficiency of the calcined raw material is improved, and therefore the zinc oxide production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of zinc oxide production, in particular to zinc oxide waste heat drying equipment. Background Art

[0002] Zinc oxide, especially nano zinc oxide, has good bactericidal ability and has the ability to replace antibiotics when combined with other metal elements. For example, "CN113080316B A method for preparing nano zinc oxide, an antibiotic substitute" has shown good application effects as a feed additive, so subsequent preparation optimization is also of great significance.

[0003] At present, the preparation process of zinc oxide includes water washing and calcination. Water washing mainly improves the purity of zinc oxide. The zinc oxide raw materials after water washing need to enter the calcination stage. The zinc oxide raw materials with higher water content will have a greater impact on the energy consumption and flue gas treatment of the calcination equipment, and increase the calcination cost. The next step after the zinc oxide raw materials are washed is calcination. If the water content of the zinc oxide raw materials is not properly handled, it will cause the above-mentioned impact. For this reason, we proposed a zinc oxide waste heat drying equipment to solve the above problems. Utility Model Content

[0004] The present application provides a zinc oxide waste heat drying device, which solves the problem that the zinc oxide raw material has a high water content, affects the calcination efficiency, and increases the calcination cost.

[0005] The present application provides a zinc oxide waste heat drying device, including a calcining furnace discharge bin, wherein a plurality of conveying pipes are penetrated through the calcining furnace discharge bin, a conveying structure is arranged in the conveying pipes, the plurality of conveying pipes are connected in series at the side walls at one end thereof through a connecting pipe, a feeding auger is installed at the starting end of the plurality of conveying pipes connected in series, a discharge auger is installed at the discharge end of the plurality of conveying pipes connected in series, one end of the plurality of conveying pipes is commonly connected to an air outlet box, and the other end is commonly connected to an air inlet box, the two ends of the conveying pipes are respectively connected to the air outlet box and the air inlet box, the air outlet box is installed with an air outlet unit, and the air inlet box is installed with an air inlet unit.

[0006] Preferably, a plurality of air outlets are provided at both ends of the delivery pipe.

[0007] Preferably, the conveying structure comprises a shaftless auger installed in a conveying pipe, with auger mounting rings fixed at both ends of the shaftless auger, wherein a connecting shaft is installed on the auger mounting ring at one end via a support rod, and the connecting shaft is connected to the motor.

[0008] Preferably, the connecting pipe is located in the air outlet box or the air inlet box, the discharging auger is installed at the bottom of the air outlet box or the air inlet box, and the discharging auger corresponds to the discharging places of the multiple conveying pipes connected in series.

[0009] Preferably, the connecting pipe is located outside the air outlet box or the air inlet box, the discharging auger is installed on one side of the discharging ends of the plurality of conveying pipes connected in series, and a collecting bin is installed at the bottom of the air outlet box.

[0010] Preferably, the air outlet unit comprises an air outlet pipe connected to the air outlet box, and the air outlet pipe is connected to a dust removal device.

[0011] Preferably, the air inlet unit comprises an air duct connected to one side of the air inlet box, a filter box is installed at one end of the air duct, and a filter layer is installed in the filter box.

[0012] Preferably, an anemometer is installed on the air duct.

[0013] Preferably, the filter layer is a sponge.

[0014] Preferably, the conveying pipes are in two groups, and the two groups of conveying pipes are arranged vertically.

[0015] It can be seen from the above technical scheme that the present application provides a zinc oxide waste heat drying device. When the present application is in use, the material calcined in the calcining furnace is sent to the discharge bin of the calcining furnace, and the zinc oxide raw material to be dried is transported to the uppermost conveying pipe through the feeding auger. The raw material in the uppermost conveying pipe passes through multiple conveying pipes in sequence through the connecting pipe by gravity, and is discharged through the discharge auger. During the material conveying process, the outlet air box is in a negative pressure state, and the air filtered by the inner diameter of the inlet air box flows to the outlet through multiple conveying pipes.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. Through the setting of multiple conveying pipes and calcining furnace discharge bin, the waste heat can be used to dry the washed zinc oxide and the calcined zinc oxide raw material can be cooled;

[0018] 2. Through the setting of conveying pipes and connecting pipes, the drying time of water-washed zinc oxide can be extended, so as to achieve the purpose of full drying;

[0019] 3. Through the setting of the air outlet box and the air inlet box, a pressure difference can be formed in the conveying pipe, and the flowing gas in the conveying pipe accelerates the drying process;

[0020] 4. Through the setting of the discharging auger and the feeding auger, the conveying pipe is sealed so that the gas can flow in the conveying pipe and take away excess moisture.

[0021] In summary, in the present application, by utilizing waste heat to dry the washed zinc oxide raw material, the drying efficiency is high, and waste heat waste in the calcination stage can be reduced, and the cooling efficiency of the raw material after calcination is improved, thereby improving the zinc oxide production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation cases. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 This is a schematic diagram of the internal structure of the external connection pipe of a zinc oxide waste heat drying device proposed by the utility model;

[0024] Figure 2 This is a schematic diagram of the external structure of the connecting pipe of the zinc oxide waste heat drying equipment proposed by the utility model;

[0025] Figure 3 A schematic diagram of the internal structure of a connecting pipe of a zinc oxide waste heat drying device proposed by the utility model;

[0026] Figure 4 This is a schematic diagram of the external structure of the connecting pipe of the zinc oxide waste heat drying equipment proposed by the utility model;

[0027] Figure 5 This is a schematic diagram of the air outlet structure of a conveying pipe of a zinc oxide waste heat drying device proposed by the utility model;

[0028] Figure 6 This is a schematic diagram of the structure of an auger installation ring of a zinc oxide waste heat drying device proposed by the utility model;

[0029] Figure 7 The utility model provides a schematic diagram of the shaftless auger structure of the zinc oxide waste heat drying equipment.

[0030] In the figure: 1 calcining furnace discharge bin, 2 conveying pipe, 3 shaftless auger, 4 outlet air box, 5 feeding auger, 6 auger mounting ring, 7 air inlet box, 8 outlet air pipe, 9 motor, 10 connecting shaft, 11 collecting bin, 12 discharge auger, 13 anemometer, 14 filter box, 15 filter layer, 16 induced draft duct, 17 connecting pipe, 18 air outlet, 19 support rod. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0032] See also Figure 1-7, a zinc oxide waste heat drying equipment, the present application mainly utilizes the waste heat after calcining zinc oxide to dry the washed zinc oxide raw material, specifically, it includes a calcining furnace discharge bin 1, the calcining furnace discharge bin 1 is a storage bin for calcined zinc oxide, the calcined zinc oxide is sent to the calcining furnace discharge bin 1, a plurality of conveying pipes 2 are arranged throughout the calcining furnace discharge bin 1, a conveying structure is arranged in the conveying pipe 2, and the material is driven to move in the conveying pipe 2, and the middle part of the conveying pipe 2 is located in the calcining furnace discharge bin 1, and the waste heat in the calcining furnace discharge bin 1 can be used to heat the conveying pipe 2 to achieve the purpose of drying, and during installation, a plurality of groups of conveying pipes 2 can be installed, and each group of conveying pipes 2 is vertically arranged, specifically, the side walls of one end of the plurality of conveying pipes 2 are connected in series through a connecting pipe 17, and the raw materials move in the plurality of conveying pipes 2 and the connecting pipe 17 in an S shape, and pass through the plurality of conveying pipes 2 and the connecting pipe 17 in turn, thereby improving the drying time of the zinc oxide raw material, and further improving the drying quality;

[0033] Since the conveying pipe 2 needs to be sealed except for the two ends, a feeding auger 5 is installed at the starting end of the multiple conveying pipes 2 connected in series, and a discharging auger 12 is installed at the discharging end of the multiple conveying pipes 2 connected in series. The feeding position can be sealed by the spiral auger to reduce gas leakage and control the material delivery amount;

[0034] One end of the multiple conveying pipes 2 is commonly connected to an air outlet box 4 and the other end is commonly connected to an air inlet box 7. The air outlet box 4 is in a negative pressure state, and the air inlet box 7 is connected to the outside and is in a standard air pressure state. The two ends of the conveying pipe 2 are respectively connected to the air outlet box 4 and the air inlet box 7, so that a flowing airflow can be formed between the conveying pipes 2 to take away the water vapor volatilized after heating, thereby improving the drying efficiency of the zinc oxide raw material. Specifically, the air outlet box 4 is equipped with an air outlet unit for generating negative pressure and processing the extracted gas. It should be understood that the material in the conveying pipe 2 should not be too much, and space for air flow needs to be reserved. The air inlet box 7 is equipped with an air inlet unit for filtering the air, so that clean air enters the air inlet box 7, thereby reducing the influence of dust in the air on the quality of the zinc oxide raw material.

[0035] In the present utility model, if Figure 5 As shown, a plurality of air vents 18 are provided at both ends of the delivery pipe 2. In the present invention, the delivery pipe 2 is connected with the air inlet box 7 and the air outlet box 4 through the air vents 18 at the ends to achieve a ventilation effect.

[0036] In the present utility model, if Figure 1 , 3As shown in 7, the conveying structure includes a shaftless auger 3 installed in the conveying pipe 2. The shaftless auger 3 is a narrow-sided auger, that is, a cylindrical channel is left in the middle for air to pass through. During the feeding process, the material in the conveying pipe 2 is controlled at 1 / 2. Auger mounting rings 6 are fixed at both ends of the shaftless auger 3. The auger mounting rings 6 are located at both ends of the two conveying pipes 2. The middle part of the auger mounting ring 6 also leaves space for air flow. A connecting shaft 10 is installed on the auger mounting ring 6 at one end through a support rod 19, which is used to drive the shaftless auger 3 to rotate. The connecting shaft 10 is connected to the motor 9. During the specific installation, the motor 9 is installed on one side of the air outlet box 4 or the air inlet box 7 to reduce the influence of dust and heat on the motor 9 and improve the service life of the motor 9.

[0037] In some embodiments, Figure 3-4 As shown, the connecting pipe 17 is located in the air outlet box 4 or the air inlet box 7. During installation, the discharging auger 12 is installed on the discharging bin 1 of the calcining furnace, at the bottom of the air outlet box 4 or the air inlet box 7. In this embodiment, the material is directly discharged into the air inlet box 7 or the air outlet box 4. The discharging auger 12 corresponds to the discharging places of multiple series-connected conveying pipes 2. When the discharging end of the bottom conveying pipe 2 is located at the air outlet box 4, the discharging auger 12 is installed on the air outlet box 4. When the discharging end of the bottom conveying pipe 2 is located at the air inlet box 7, the discharging auger 12 is installed at the bottom of the air inlet box 7. In this embodiment, the discharging work can be completed through the air outlet box 4 or the air inlet box 7, and negative pressure drying can also be carried out in the final discharging link of the raw materials.

[0038] In some embodiments, Figure 1-2 , the connecting pipe 17 is located outside the air outlet box 4 or the air inlet box 7. In the present embodiment, the material unloading and the air flow are carried out separately. The unloading auger 12 is installed on one side of the unloading end of a plurality of conveying pipes 2 connected in series. The unloading auger 12 is installed at the unloading end of the lowest conveying pipe 2. A collecting bin 11 is installed at the bottom of the air outlet box 4 for collecting the raw material dust brought into the air outlet box 4 by the air flow. It should be understood that a discharge valve is installed at the bottom of the collecting bin 11. In the present embodiment, the size of the air outlet box 4 and the air inlet box 7 can be reduced, thereby reducing the installation cost and difficulty.

[0039] In the utility model, the air outlet unit includes an air outlet pipe 8 connected to the air outlet box 4, and the air outlet pipe 8 is connected to the dust removal equipment. The dust removal equipment cannot be a general dust removal equipment in the factory area. Specifically, during installation, the dust removal equipment is preferably a separate Venturi dust removal equipment, which can complete the collection of raw materials, and has a small size and low cost.

[0040] In the utility model, the air intake unit includes an air duct 16 connected to one side of the air inlet box 7, a filter box 14 is installed at one end of the air duct 16, a space for air flow needs to be reserved at the connection between the air duct 16 and the filter box 14, a filter layer 15 is installed in the filter box 14, and the air entering the air duct 16 is first filtered by the filter box 14 before entering the air inlet box 7, which reduces the influence of dust in the factory on product quality. During installation, the preferred filter layer 15 is sponge, which is easy to replace and low in cost, can effectively filter dust, and has high air permeability, which is convenient for air inhalation;

[0041] During the specific installation, an anemometer 13 is installed on the induced draft pipe 16 to check the air flow rate entering the air inlet box 7. When the air flow rate decreases, the feed amount of the raw material to be dried can be reduced to ensure the gas circulation in the conveying pipe 2.

[0042] In the utility model, there are two groups of conveying pipes 2, which are arranged vertically to improve the drying efficiency. The installation of the conveying pipes 2 can be designed according to the width of the calcining furnace discharge bin 1 so as not to affect the normal discharge of the calcining furnace discharge bin 1.

[0043] It can be seen from the above technical scheme that when the present application is in use, the material calcined in the calcining furnace is delivered to the calcining furnace discharge bin 1, and the zinc oxide raw material to be dried is delivered to the uppermost conveying pipe 2 through the feeding auger 5. The raw material in the uppermost conveying pipe 2 passes through multiple conveying pipes 2 in sequence through the connecting pipe 17 by gravity, and is discharged through the discharge auger 12. During the material conveying process, the air outlet box 4 is in a negative pressure state, and the air filtered by the inner diameter of the air inlet box 7 flows through multiple conveying pipes 2 to the air outlet box 4 for discharge, taking away the moisture in the zinc oxide raw material and improving the drying efficiency.

[0044] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope of the present application is indicated by the claims.

[0045] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A zinc oxide waste heat drying device, comprising a calcining furnace discharge bin (1), characterized in that: A plurality of conveying pipes (2) are provided through the discharge bin (1) of the calcining furnace, and a conveying structure is provided in the conveying pipes (2). The side walls of one end of the plurality of conveying pipes (2) are connected in series via a connecting pipe (17), a feeding auger (5) is installed at the starting end of the plurality of conveying pipes (2) connected in series, and a discharge auger (12) is installed at the discharge end of the plurality of conveying pipes (2) connected in series. One end of the plurality of conveying pipes (2) is commonly connected to an air outlet box (4), and the other end is commonly connected to an air inlet box (7). The two ends of the conveying pipes (2) are respectively connected to the air outlet box (4) and the air inlet box (7), the air outlet box (4) is installed with an air outlet unit, and the air inlet box (7) is installed with an air inlet unit.

2. The zinc oxide waste heat drying equipment according to claim 1, characterized in that: Both ends of the delivery pipe (2) are provided with a plurality of air outlets (18).

3. The zinc oxide waste heat drying equipment according to claim 1, characterized in that: The conveying structure comprises a shaftless auger (3) installed in a conveying pipe (2), wherein auger mounting rings (6) are fixed at both ends of the shaftless auger (3), wherein a connecting shaft (10) is installed on the auger mounting ring (6) at one end via a support rod (19), and the connecting shaft (10) is connected to a motor (9).

4. The zinc oxide waste heat drying equipment according to claim 1, characterized in that: The connecting pipe (17) is located in the air outlet box (4) or the air inlet box (7), the discharge auger (12) is installed at the bottom of the air outlet box (4) or the air inlet box (7), and the discharge auger (12) corresponds to the discharge points of the plurality of conveying pipes (2) connected in series.

5. The zinc oxide waste heat drying equipment according to claim 1, characterized in that: The connecting pipe (17) is located outside the air outlet box (4) or the air inlet box (7), the discharge auger (12) is installed on one side of the discharge end of the plurality of conveying pipes (2) connected in series, and a collecting bin (11) is installed at the bottom of the air outlet box (4).

6. The zinc oxide waste heat drying equipment according to claim 1, characterized in that: The air outlet unit comprises an air outlet pipe (8) connected to the air outlet box (4), and the air outlet pipe (8) is connected to a dust removal device.

7. The zinc oxide waste heat drying equipment according to claim 1, characterized in that: The air inlet unit comprises an air duct (16) connected to one side of the air inlet box (7), a filter box (14) is installed at one end of the air duct (16), and a filter layer (15) is installed in the filter box (14).

8. The zinc oxide waste heat drying equipment according to claim 7, characterized in that: The air duct (16) is provided with an anemometer (13).

9. The zinc oxide waste heat drying equipment according to claim 7, characterized in that: The filter layer (15) is a sponge.

10. The zinc oxide waste heat drying equipment according to claim 1, characterized in that: The conveying pipes (2) are in two groups, and the two groups of conveying pipes (2) are arranged vertically.

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