Drum dewatering drying apparatus

Abstract

The present application relates to a drum dewatering drying device, which places toothed rollers or balls inside the drum, and the toothed rollers or balls roll when the drum rotates, the rolling toothed rollers or balls crush the materials, and the materials adhered to the inner wall of the drum are stripped from the drum; the toothed rollers and balls promote dewatering and drying, and enhance the function and application range of the drum drying device.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment; and particularly to dehydration and drying equipment. Background Technology

[0002] Dehydration refers to removing free or bound water from materials, reducing the moisture content to 10-30%; drying, on the other hand, involves further evaporating residual moisture to reduce the moisture content to below 5%, or even achieving complete anhydrousness (such as freeze drying). Both processes are often completed in the same equipment or production line, forming an integrated "dehydration-drying" process chain.

[0003] The drying process requires the simultaneous transfer of heat and mass (moisture). Key conditions include: the vapor partial pressure of moisture on the material surface is higher than the external partial pressure; the heat source temperature is higher than the material temperature; and internal moisture diffuses to the surface and vaporizes until the material is completely dry. The drying rate depends on the surface vaporization rate and the internal moisture diffusion rate.

[0004] Heating and ventilation systems are crucial in the drying process. Heat sources, including electricity, gas, and steam, provide thermal energy, causing the moisture in the material to change from bound water and liquid water to gaseous state. The ventilation system exhausts steam and introduces fresh air, reducing vapor partial pressure and ensuring continuous drying. Heating methods include convection (direct contact between the heat medium and the material, such as hot air drying), conduction (heat transfer through metal walls, high thermal efficiency but limited by heat transfer area), radiation (using electromagnetic waves to heat the material surface), and dielectric (such as microwave drying, generating heat through high-frequency vibration of polar molecules). Based on the material movement, dryers are classified as fixed-bed, agitated, spray, and combined types. Based on their structure, dryers are classified as drum dryers, spray dryers, fluidized bed dryers, scraper dryers, disc dryers, rake dryers, and paddle dryers. Spray dryers and fluidized bed dryers, also known as airflow dryers, achieve heat exchange and moisture evaporation through contact between hot air and the material, completing the drying process; they have advantages such as fast drying speed, wide applicability, simple equipment, and easy operation.

[0005] A rotary drum dryer is a highly efficient drying device that can utilize both conductive and convective heating methods. It offers high operational flexibility and is particularly suitable for drying solid materials such as coal slime, fly ash, sand, silica sand, and chemical raw materials, typically requiring only 10-300 seconds for drying. Rotary drum dryers have a large processing capacity, low fuel consumption, and low drying costs. The dryer mainly consists of a rotating drum, lifting plates, a rotating system, support equipment, and sealing ring components. The dryer's cylinder is inclined at an angle to the horizontal plane. Material is added to the rotating drum from the higher end and, as the drum rotates, moves to the lower end due to gravity, exiting the dryer and completing the drying process. However, for liquid materials, the resulting solid material adheres to the inner wall of the drum, significantly reducing drying efficiency. To address this problem, this invention discloses the beneficial effects of using toothed rollers or balls in conjunction with the drum. Utility Model Content

[0006] The purpose of this invention is to provide a novel drum dryer that improves the drying efficiency of existing drum dryers and expands their application range. This novel drum dryer can dry not only solid materials but also dehydrate and dry liquid materials. Compared to traditional drum dryers, the novel drum dryer mainly adds toothed rollers or balls. The rolling of these rollers or balls within the drum removes material adhering to the drum wall and crushes large pieces of material to promote drying. In addition to the functions of the original dryer, the novel dryer adds the functions of eliminating material adhesion to the drum wall and crushing materials. A schematic diagram of the novel drum dryer structure is shown below. Figure 1 .

[0007] Figure 1 This is a schematic diagram of a novel drum drying device according to the present invention. A rolling toothed roller 2 is located inside a drum 1. When the drum 1 rotates, the toothed roller 2 rotates at the bottom of the drum 1, crushing and dehydrating the solid material, while simultaneously causing the material to fall off the inner wall of the drum 1. Cylindrical metal rods 3 are fixed to the inner wall of the drum 1. The distance between the rods 3 is less than the diameter of the toothed roller 2, and all the metal rods 3 are distributed on the same cross-section of the drum 1. The rods 3 ensure that the toothed roller 2 rolls within the same area. Dust-collecting plates 4 are fixed to the inner wall of the drum 1 and are evenly distributed. Moisture-containing material enters the drum 1 from the end where the toothed roller 2 is placed. The moisture-containing material can be solid or liquid. A ball can be used instead of a toothed roller 2 to perform a similar function. A chain can replace the dust-collecting plates.

[0008] Furthermore, the drum dryer of the present invention also includes the necessary supporting equipment such as a feeding machine, a discharging machine, a waste heat recovery system, a drum rotation system, a heat source, a fluid transfer pump, a flow meter, a throttle valve, a thermometer, and a control system.

[0009] Furthermore, the drum drying equipment of the present invention mainly consists of toothed rollers and drums, wherein the toothed rollers are selected from T-shaped tooth structures, such as... Figure 2 .

[0010] Furthermore, the drum drying equipment of the present invention mainly consists of toothed rollers and drums, wherein the toothed rollers are selected from strip-shaped tooth structures, such as... Figure 3 .

[0011] Furthermore, the drum drying equipment described in this invention mainly consists of toothed rollers and drums, as well as dust-raising plates, for promoting dehydration and drying.

[0012] Furthermore, the drum drying equipment described in this invention mainly consists of toothed rollers and drums, as well as a dust-lifting chain for promoting dehydration and drying.

[0013] Furthermore, the drum drying equipment described in this invention can be equipped with various heat sources to complete the drying process, such as electric heating, gas heating, coal heating, and hot air.

[0014] Furthermore, the drum drying equipment of the present invention mainly consists of balls and a drum, with the balls inside the drum and the balls able to roll at one end of the drum as the drum rotates.

[0015] Furthermore, the drum drying equipment described in this invention mainly consists of balls and drums, as well as dust-raising plates, for promoting dehydration and drying.

[0016] Furthermore, the drum drying equipment described in this invention mainly consists of balls and drums, as well as a dust-lifting chain for promoting dehydration and drying.

[0017] The beneficial effects of the present invention are as follows: The drum drying equipment of the present invention, by utilizing the action of toothed rollers and balls, can not only improve the dehydration and drying efficiency, but also expand the application range of the drum drying equipment and enhance its function. Attached Figure Description

[0018] Figure 1 is a schematic diagram of a drum drying device according to the present invention.

[0019] Figure 2 This is a schematic diagram of a toothed roller 2 according to the present invention.

[0020] Figure 3 This is a schematic diagram of a toothed roller 2 according to the present invention.

[0021] like Figure 1 As shown: 1. Roller; 2. Toothed roller; 3. Cylindrical metal rod; 4. Dust-raising plate.

[0022] like Figure 2 The diagram shows a toothed roller 2 with a T-shaped tooth surface.

[0023] like Figure 3As shown: Schematic diagram of toothed roller 2 with strip-shaped teeth on the surface. Detailed Implementation

[0024] To make the content of this invention clearer and more understandable, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. In specific implementation, appropriate drying equipment and drying processes are selected according to the characteristics of the material and heat source.

[0025] Example 1, Combined with appendix Figure 1 and Figure 2 In specific implementations of this invention: Magnesium sulfate solution sprayed in Figure 1 Inside the drum of the rotary drum dryer shown, the aqueous solution evaporates upon heating, producing solid magnesium sulfate that adheres to the inner wall of the drum. The rotation of the drum drives the toothed rollers at the bottom to roll, crushing the solid material adhering to the drum wall and causing it to detach and flow into the next section of the drum. Finally, the dried material exits the dryer at the tail end of the drum. By adjusting the drum speed and heat source temperature, the dehydrated products can be either magnesium sulfate containing water of crystallization or anhydrous magnesium sulfate.

[0026] Example 2, Combined with appendix Figure 1 and Figure 3 In specific implementations of this invention: Sodium sulfate solution sprayed in Figure 1 Inside the drum of the rotary drum dryer shown, the aqueous solution evaporates upon heating, producing solid magnesium sulfate that adheres to the inner wall of the drum. The rotation of the drum drives the toothed rollers at the bottom to roll, crushing the solid material adhering to the drum wall and causing it to detach and flow into the next section of the drum. Finally, the dried material exits the dryer at the tail end of the drum. By adjusting the drum speed and heat source temperature, the dehydrated products are sodium sulfate containing ten molecules of water of crystallization and anhydrous sodium sulfate, respectively.

[0027] Example 3, Combined with appendix Figure 1 In specific implementations of this invention: Sodium sulfate solution sprayed in Figure 1 Inside the drum of the rotary drum dryer shown, the aqueous solution evaporates upon heating, producing solid magnesium sulfate that adheres to the inner wall of the drum. The rotation of the drum causes balls at the bottom to roll, crushing the solid material adhering to the drum wall and allowing it to detach and flow into the next section of the drum. Finally, the dried material exits the dryer at the tail end of the drum. By adjusting the drum speed and heat source temperature, the dehydrated products are sodium sulfate containing water of crystallization and anhydrous sodium sulfate, respectively.

[0028] Example 4, Combined with appendix Figure 1 In specific implementations of this invention: Starch solution sprayed in Figure 1 Inside the drum of the rotary drum dryer shown, the aqueous solution is heated and evaporates to produce solid starch that adheres to the inner wall of the drum. The drum's rotation causes balls to roll, crushing the solid material adhering to the drum wall and allowing it to detach and flow into the next section of the drum. A chain replaces the dust-collecting plate, and the drying process is completed, with the starch exiting the dryer at the tail end of the drum. Water vapor and starch solution exchange heat and cool each other through a heat exchanger, recovering heat energy and water. The dried starch exiting the dryer preheats the starch solution through a heat exchanger, recovering heat energy.

[0029] Note: The technical features and applications of this invention are not intended to limit the scope of this invention. Any technical modifications or substitutions made within the spirit and scope of the technical solutions and claims involved in this invention fall within the technical scope of this invention.

Claims

1. A drum dewatering and drying device, characterized in that: the drum dewatering and drying device includes a toothed roller, a drum and a rotating system; the toothed roller is located at one end inside the drum, and the rotation of the drum drives the toothed roller to roll, and the rolling of the toothed roller crushes the material so that it is separated from the inner wall of the drum.

2. A drum dewatering and drying device, characterized in that: the drum dewatering and drying device includes a ball, a drum and a rotating system; the ball is located at one end inside the drum, the drum rotates and drives the ball to roll, the ball rolls and crushes the material so that it is separated from the inner wall of the drum.

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