Calcium sulfate waste residue circulating drying device

Abstract

The utility model discloses a calcium sulfate waste residue circulating drying device which comprises a machine body, a drying device, a crushing device, a drying device, a crushing device, a drying device, a drying device, a crushing device, a drying device and a drying device, and the machine body is provided with a hot air assembly for drying filter cakes, a crushing assembly for crushing the filter cakes and a feeding port and a discharging port; the first conveying device is used for horizontally conveying a filter cake entering the cavity of the machine body from the feeding hole to the crushing assembly; the second conveying device is used for horizontally conveying the filter cake crushed by the crushing assembly to the discharge port; the first conveying device and the second conveying device are arranged up and down, and the conveying tracks of the first conveying device and the second conveying device are both perpendicular to the blowing track of the hot air assembly. According to the device, the output of solid wastes in wastewater treatment can be reduced, the risk of pollution to the environment is reduced, and meanwhile, the drying use effect of the device is also improved.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment, specifically to a calcium sulfate waste residue recycling drying device. Background Technology

[0002] Activated clay is mainly used for decolorizing and refining mineral oils, vegetable oils, and animal fats, and is an important raw material for petrochemicals and daily chemical products. Activated clay is made from bentonite using a wet acidification process. The production process includes: bentonite hydration, sulfuric acid activation, washing, drying, and pulverization. Because the product has a high acid content, it requires repeated washing to reduce the acid content to less than 0.2%. The amount of wastewater generated during the washing process varies depending on the method, but the production of 1 ton of activated clay generally generates no less than 30-40 tons of wastewater. This wastewater mainly contains aluminum sulfate produced by the bentonite acidification reaction and unreacted sulfuric acid. Direct discharge would not only waste a large amount of resources but also cause serious environmental pollution.

[0003] Lime neutralization is one method for treating wastewater from activated clay production. Adding lime neutralizes the acidity in the wastewater. This method effectively addresses the problem of treating acidic wastewater. However, the sludge (mainly calcium sulfate) produced during wastewater treatment, after being filtered through a pressure filter, forms solid waste (i.e., sludge cake) that still poses a pollution risk due to its high water content, requiring further treatment. Utility Model Content

[0004] The purpose of this invention is to provide a calcium sulfate waste residue recycling drying device, which can reduce the amount of solid waste generated in wastewater treatment, reduce the risk of environmental pollution, and improve the drying effect of the device.

[0005] The technical solution adopted by this utility model to solve the above problems is:

[0006] A calcium sulfate waste residue recycling drying device includes:

[0007] The machine body is equipped with a hot air assembly for drying the filter cake and a crushing assembly for breaking the filter cake. The machine body is equipped with a feed inlet and a discharge outlet.

[0008] The first conveying device is used to horizontally convey the filter cake that enters the machine cavity from the feed inlet to the crushing component.

[0009] The second conveying device is used to horizontally convey the filter cake, which has been crushed by the crushing component, to the discharge port;

[0010] The first conveying device and the second conveying device are arranged vertically, and their conveying trajectories are perpendicular to the blowing trajectory of the hot air assembly.

[0011] As a further improvement to the above technical solution, the machine body is provided with an air intake channel and several air outlet channels. The air inlet of the air intake channel is located on the blowing trajectory of the hot air assembly. The air inlet of each air outlet channel is connected to the air outlet of the air intake channel. The air outlet channels are arranged at equal intervals along the conveying direction of the filter cake. The air outlet channels span between the first conveying device and the second conveying device. Several air outlets are provided at the top and bottom of the air outlet channels.

[0012] As a further improvement to the above technical solution, the hot air assembly includes a heating device for heating air and a fan for conveying hot air into the cavity of the machine body. The heating device is located directly above the fan. A hot air pipe is provided on the top surface of the machine body. The hot air pipe is trapezoidal columnar. The opening at the bottom of the hot air pipe is connected to the cavity of the machine body. The fan is detachably installed on the opening at the top of the hot air pipe.

[0013] As a further improvement to the above technical solution, the crushing assembly includes a crushing shaft and a crushing chamber on the machine body. The crushing chamber is a hollow structure with openings at both ends. The opening at the top of the crushing chamber is located directly below the end of the conveying trajectory of the first conveying device, and the opening at the bottom of the crushing chamber is located directly above the beginning of the conveying trajectory of the second conveying device. The crushing shaft is rotatably disposed in the crushing chamber. A drive motor for driving the crushing shaft to rotate relative to the machine body is installed on the machine body. The crushing shaft is provided with a number of tooth units arranged at equal intervals along its axial direction. The tooth unit includes a number of crushing teeth arranged at equal angles around the central axis of the crushing shaft.

[0014] As a further improvement to the above technical solution, a metal mesh is provided on the air outlet.

[0015] As a further improvement to the above technical solution, both the inlet and outlet are equipped with guide hoppers.

[0016] As a further improvement to the above technical solution, both the first conveying device and the second conveying device are detachably equipped with two limiting plates to prevent the filter cake from falling off them. The two limiting plates are arranged symmetrically to the left and right of the conveying direction of the filter cake.

[0017] Compared with the prior art, this utility model has the following advantages and effects:

[0018] (1) This utility model dries the filter cake in the device by using a hot air assembly, which can greatly reduce the moisture content of the filter cake, so that the filter cake containing calcium sulfate can be sold as a by-product in wastewater treatment (such as sold to cement plants), which improves the utilization rate and reduces the amount of solid waste generated, thereby reducing the risk of environmental pollution.

[0019] (2) By setting the position structure between the first conveying device and the second conveying device and the conveying effect of the two on the filter cake, the time for the filter cake to be dried by hot air in the device is increased, ensuring the drying quality of the device. The filter cake on the first conveying device has a lower moisture content after drying, which facilitates the subsequent crushing component to crush the filter cake. At the same time, the surface area of ​​the crushed filter cake is greatly increased, which improves the drying effect during the conveying process via the second conveying device, thereby improving the drying effect of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a calcium sulfate waste residue recycling drying device according to the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of a calcium sulfate waste residue recycling drying device from another perspective.

[0022] Figure 3 yes Figure 2 The diagram shows a partial enlarged view of the longitudinal section of the internal structure of the machine body.

[0023] Figure 4 yes Figure 3 The diagram shows a partial enlarged view of the air outlet duct structure.

[0024] Figure 5 yes Figure 2 The diagram shows the structure of the hot air assembly.

[0025] Figure 6 yes Figure 2 The diagram shows the structure of the pulverizing component.

[0026] The components include: body 1, feed inlet 11, discharge outlet 12, hot air assembly 2, heating device 21, fan 22, hot air pipe 23, crushing assembly 3, crushing shaft 31, crushing chamber 32, drive motor 33, first conveying device 4, second conveying device 5, guide hopper 6, limiting plate 7, air intake channel 81, air outlet channel 82, air blower 83, metal mesh 84, tooth unit 9, and crushing teeth 91. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0028] See Figures 1-6This embodiment discloses a calcium sulfate waste residue recycling drying device, including a body 1. The body 1 is equipped with a hot air assembly 2 for drying filter cake and a crushing assembly 3 for crushing filter cake. The body 1 is provided with an inlet 11 and an outlet 12. The body 1 is equipped with a first conveying device 4 for horizontally conveying the filter cake entering the cavity of the body 1 from the inlet 11 to the crushing assembly 3 and a second conveying device 5 for horizontally conveying the filter cake crushed by the crushing assembly 3 to the outlet 12. The first conveying device 4 and the second conveying device 5 are arranged vertically, and the conveying trajectories of both are perpendicular to the blowing trajectory of the hot air assembly 2.

[0029] In use, the filter cake falls onto the first conveying device 4 through the feed inlet 11. During its transport to the crushing assembly 3 via the first conveying device 4, the hot air assembly 2 generates hot air to dry the filter cake, reducing its moisture content and facilitating subsequent crushing. When the filter cake reaches the crushing assembly 3, it is crushed, reducing its volume while increasing its surface area. This increases the contact between the hot air and the filter cake during its transport to the discharge outlet 12 via the second conveying device 5, improving the drying effect and quality.

[0030] See Figure 1 , Figure 2 Both the feed inlet 11 and the discharge outlet 12 are equipped with guide hoppers 6, which improves the smoothness of feeding and discharging on the machine body 1.

[0031] See Figure 3 Both the first conveying device 4 and the second conveying device 5 are detachably equipped with two limiting plates 7 to prevent the filter cake from falling off. The two limiting plates 7 are symmetrically arranged from left to right relative to the conveying direction of the filter cake, which ensures the conveying effect and quality of the first conveying device 4 and the second conveying device 5.

[0032] See Figure 3 , Figure 4 The machine body 1 is provided with an air intake channel 81 and several air outlet channels 82. The air inlet of the air intake channel 81 is located on the air blowing trajectory of the hot air assembly 2. The air inlets of each air outlet channel 82 are connected to the air outlets of the air intake channel 81. The air outlet channels 82 are arranged at equal intervals along the conveying direction of the filter cake. The air outlet channels 82 span between the first conveying device 4 and the second conveying device 5. Several air outlets 83 are provided at the top and bottom of the air outlet channels 82, which increases the angle of the hot air blowing towards the filter cake, which is beneficial to improving the drying quality and efficiency.

[0033] The air outlet 83 is equipped with a metal mesh 84, which reduces the risk that small particles separated from the filter cake will enter the air outlet channel 82 through the air outlet 83 and affect the output hot air of the air outlet channel 82, thus ensuring the effectiveness of the output hot air of the air outlet channel 82.

[0034] In this embodiment, the first conveying device 4 can be a roller conveyor. The hot air output from the air outlet 83 at the top of the air outlet channel 82 can be blown onto the bottom surface of the filter cake through the gap between adjacent rollers on the roller conveyor, thereby improving the drying effect of the filter cake.

[0035] See Figure 5 The hot air assembly 2 includes a heating device 21 for heating air and a fan 22 for delivering hot air into the cavity of the body 1. The heating device 21 is located directly above the fan 22. A hot air pipe 23 is provided on the top surface of the body 1. The hot air pipe 23 is trapezoidal columnar. The opening at the bottom of the hot air pipe 23 is connected to the cavity of the body 1. The fan 22 is detachably installed on the opening at the top of the hot air pipe 23.

[0036] In use, the air is heated by the heating device 21 to form high-temperature hot air. Then, the fan 22 delivers the high-temperature hot air into the cavity of the machine body 1 through the hot air pipe 23, where it comes into contact with the filter cake located on the first conveying device 4 and the second conveying device 5, thereby accelerating the evaporation of moisture in the filter cake and achieving the purpose of drying.

[0037] See Figure 6 The crushing assembly 3 includes a crushing shaft 31 and a crushing chamber 32 on the body 1. The crushing chamber 32 is a hollow structure with openings at both ends. The opening at the top of the crushing chamber 32 is located directly below the end of the conveying track of the first conveying device 4, and the opening at the bottom is located directly above the first section of the conveying track of the second conveying device 5. The crushing shaft 31 is rotatably disposed in the crushing chamber 32. A drive motor 33 is installed on the body 1 to drive the crushing shaft 31 to rotate relative to the body 1. The crushing shaft 31 is provided with a plurality of tooth units 9 arranged at equal intervals along its axial direction. The tooth unit 9 includes a plurality of crushing teeth 91 arranged at equal angles around the central axis of the crushing shaft 31.

[0038] After being dried by hot air, the filter cake is conveyed into the crushing chamber 32 by the first conveying device 4. The crushing shaft 31 drives the toothed unit 9 to rotate under the drive of the drive motor 33, so that the crushing teeth 91 in the toothed unit 9 can crush the filter cake by impact, thereby reducing the volume of the filter cake. At the same time, the crushed filter cake falls onto the second conveying device 5 under the action of gravity, and is conveyed to the discharge port 12 by the second conveying device 5.

[0039] To ensure the crushing efficiency and effectiveness of the crushing component 3 on the filter cake, the length of the crushing teeth 91 in at least two toothed units 9 can be extended and the number reduced. This not only enhances the crushing effect of the crushing teeth 91 on the filter cake, but also improves the effect of pushing the filter cake toward the crushing shaft 31, thereby ensuring the effectiveness and efficiency of the crushing component 3 in crushing the filter cake.

[0040] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A circulating drying device for calcium sulfate waste residue, characterized in that, include: The machine body is equipped with a hot air assembly for drying the filter cake and a crushing assembly for breaking the filter cake. The machine body is equipped with a feed inlet and a discharge outlet. The first conveying device is used to horizontally convey the filter cake that enters the machine cavity from the feed inlet to the crushing component. The second conveying device is used to horizontally convey the filter cake, which has been crushed by the crushing component, to the discharge port; The first conveying device and the second conveying device are arranged vertically, and their conveying trajectories are perpendicular to the blowing trajectory of the hot air assembly.

2. The calcium sulfate waste residue circulating drying device according to claim 1, characterized in that: The machine body is provided with an air intake channel and several air outlet channels. The air inlet of the air intake channel is located on the air blowing trajectory of the hot air assembly. The air inlet of each air outlet channel is connected to the air outlet of the air intake channel. The air outlet channels are arranged at equal intervals along the conveying direction of the filter cake. The air outlet channels span between the first conveying device and the second conveying device. Several air outlets are provided at the top and bottom of the air outlet channels.

3. The calcium sulfate waste residue circulating drying device according to claim 1, characterized in that: The hot air assembly includes a heating device for heating air and a fan for delivering hot air into the cavity of the machine body. The heating device is located directly above the fan. A hot air duct is provided on the top surface of the machine body. The hot air duct is trapezoidal columnar. The opening at the bottom of the hot air duct is connected to the cavity of the machine body. The fan is detachably installed on the opening at the top of the hot air duct.

4. The calcium sulfate waste residue circulating drying device according to claim 1, characterized in that: The crushing assembly includes a crushing shaft and a crushing chamber on the machine body. The crushing chamber is a hollow structure with openings at both ends. The opening at the top of the crushing chamber is located directly below the end of the conveying track of the first conveying device, and the opening at the bottom of the crushing chamber is located directly above the beginning of the conveying track of the second conveying device. The crushing shaft is rotatably disposed in the crushing chamber. A drive motor for driving the crushing shaft to rotate relative to the machine body is installed on the machine body. The crushing shaft is provided with a number of tooth units arranged at equal intervals along its axial direction. The tooth unit includes a number of crushing teeth arranged at equal angles around the central axis of the crushing shaft.

5. The calcium sulfate waste residue circulating drying device according to claim 2, characterized in that: The air outlet is equipped with a metal mesh.

6. The calcium sulfate waste residue circulating drying device according to claim 1, characterized in that: Both the inlet and outlet are equipped with guide hoppers.

7. The calcium sulfate waste residue circulating drying device according to claim 1, characterized in that: Both the first and second conveying devices are detachably equipped with two limiting plates to prevent the filter cake from detaching from them. The two limiting plates are arranged symmetrically to the left and right of the conveying direction of the filter cake.

Images