Energy-saving drying tower with built-in spiral guide plates

Abstract

The utility model provides an energy-saving drying tower with built-in spiral guide plates, which comprises a tower body, a countercurrent flow heat exchange group, a vibration evaporation group and a fluffy drying group are sequentially arranged in the tower body from top to bottom, a feed inlet and a first air inlet are sequentially arranged on the tower body from top to bottom, the feed inlet is higher than the countercurrent flow heat exchange group, and the air inlet is higher than the fluffy drying group. The first gas inlet is arranged between the countercurrent flow heat exchange group and the oscillation evaporation group, the top end of the tower body is provided with a gas outlet, and a pipeline connected with the gas outlet and a pipeline connected with the first gas inlet are both connected with a heat exchanger. The product is dried and fluffy, part of heat energy can be saved, and energy waste is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of chemical product drying, and specifically relates to an energy-saving drying tower with a built-in spiral guide plate. Background Technology

[0002] Currently, tower thermal dehydration drying is a widely used drying and dehydration technology in the mining and chemical industries. It typically uses thermodynamic principles to remove moisture from materials through evaporation and condensation processes. Tower thermal dehydration is commonly used for drying, dehydration, and decarbonization of mineral, chemical intermediate and final products.

[0003] However, existing tower-type thermal dehydration and drying equipment relies on heating and drying to dehydrate the material. It is difficult for the material to come into uniform contact with the hot air. Uneven heating leads to insufficient dehydration of the material, which can cause clumping. At the same time, hot air drying consumes a lot of energy.

[0004] Therefore, in view of the shortcomings of the above-mentioned solutions in actual production and implementation, modifications and improvements have been made. At the same time, in the spirit and concept of seeking excellence, and with the assistance of professional knowledge and experience, and after much ingenuity and experimentation, this utility model was created, and an energy-saving drying tower with a built-in spiral guide plate is provided to solve the problems of the prior art. Utility Model Content

[0005] This invention proposes an energy-saving drying tower with a built-in spiral guide plate, which solves the problems in the prior art.

[0006] The technical solution of this utility model is implemented as follows: An energy-saving drying tower with a built-in spiral guide plate includes a tower body. Inside the tower body, from top to bottom, there are a counter-current heat exchange group, an oscillating evaporation group, and a loosening drying group. From top to bottom, the tower body is provided with a feed inlet and an air inlet. The feed inlet is positioned higher than the counter-current heat exchange group, and the air inlet is positioned between the counter-current heat exchange group and the oscillating evaporation group. The top of the tower body is provided with an air outlet. The pipe connected to the air outlet and the pipe connected to the air inlet are both connected to a heat exchanger.

[0007] As a further improvement, the countercurrent heat exchanger is equipped with a spiral guide plate, which is welded to the inner side wall of the tower body, and the inclination angle of the spiral guide plate is 15°. o .

[0008] As a further improvement, the oscillating evaporation group includes several parallel circular evaporation nets, wherein the edge of the bottommost evaporation net is fixed to the inner wall of the tower body, several oscillating springs are provided between each two adjacent layers of evaporation nets, and several vibrators are provided at the lower end of the evaporation nets, the vibrators being connected to the inner wall of the tower body.

[0009] As a further improvement, the fluffing drying unit includes a rotary dryer, a receiving hopper is connected to the inner wall of the tower body, the receiving hopper is located below the countercurrent heat exchange unit, the upper end of the rotary dryer is connected to the receiving hopper, and the bottom end of the tower body is provided with a discharge channel, the bottom end of the rotary dryer is connected to the discharge channel.

[0010] As a further improvement, the inner wall of the rotary dryer is provided with drying plates, which are fixed to the inner wall of the rotary dryer. The rotary dryer includes a first supporting outer ring, a second supporting inner ring, and a third supporting outer ring. The upper and lower ends of the second supporting inner ring are provided with rotary sliding connectors. The first supporting outer ring and the second supporting outer ring are respectively located on the rotary sliding connectors at the upper and lower ends of the second supporting inner ring. A plurality of rolling columns are provided between the first supporting outer ring, the second supporting outer ring, and the inner supporting ring. The upper end of the first supporting outer ring is fixed to the lower end of the receiving hopper, and the lower end of the second supporting outer ring is fixed to the upper end of the discharge channel.

[0011] As a further improvement, the tower body is provided with an opening at the loose drying group and a rotating shaft connected to a rotating motor is provided outside the opening. A transmission belt is sleeved around the rotating shaft, and the other end of the transmission belt is sleeved around the inner ring of the support.

[0012] As a further improvement, the tower body is provided with a second air inlet, which is located between the oscillating evaporation group and the fluffing drying group.

[0013] As a further improvement, a star-shaped discharge valve is provided at the outlet of the discharge channel.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are: by using the counter-current heat exchange group, the liquid material and hot air form a counter-current state along the trajectory of the spiral guide plate, which slows down the flow rate of the material, increases the contact time and contact area between the material and the hot air, and makes the heating of the material more uniform and effective.

[0015] The oscillating evaporator uses a spring that vibrates up and down by the force of the material hitting the evaporating screen. This vibration causes crystals that may be attached to the evaporating screen to fall off, preventing the material from crystallizing and causing blockages. The contact area between the material and the evaporating screen further increases the contact area with the hot air.

[0016] The loose drying unit rotates the dryer to stir and dry the incoming material, breaking up the clumps in the crystalline material, making the material heat more evenly and the product more fluffy.

[0017] Both the pipe connected to the outlet and the pipe connected to the inlet are connected to a heat exchanger, which exchanges heat between the discharged gas and the gas to be introduced. This pre-treatment of the gas to be introduced through the inlet reduces the waste of heat energy to a certain extent and achieves energy-saving effect.

[0018] This invention can effectively heat materials evenly, improve heating efficiency and quality, make products drier and fluffier, and save some heat energy, thus avoiding energy waste. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the spiral guide plate structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the evaporation mesh and oscillating spring structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the fluffy drying unit of this utility model;

[0025] Figure 6 This is a schematic diagram of the rotary dryer structure of this utility model;

[0026] Figure 7 This is an exploded view of the rotary dryer structure of this utility model;

[0027] In the diagram, 1-countercurrent heat exchange group, 11-spiral guide plate; 2-oscillating evaporation group, 21-evaporation mesh, 22-oscillating spring, 23-vibrator; 3-fluffy drying group, 31-rotary dryer, 311-outer support ring one, 312-inner support ring, 313-outer support ring two, 314-rolling column, 32-drying plate, 33-drive belt, 34-rotating shaft, 35-rotating motor; 4-tower body, 41-feed inlet, 42-air inlet one, 43-air inlet two, 44-air outlet, 45-discharge channel, 46-star discharge valve, 47-collecting hopper; 5-heat exchanger. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1 to 7 As shown, an energy-saving drying tower with a built-in spiral guide plate includes a tower body 4. Inside the tower body 4, from top to bottom, there are a counter-current heat exchange group 1, an oscillating evaporation group 2, and a loosening drying group 3. From top to bottom, the tower body 4 is provided with a feed inlet 41 and an air inlet 42. The feed inlet 41 is positioned higher than the counter-current heat exchange group 1, and the air inlet 42 is positioned between the counter-current heat exchange group 1 and the oscillating evaporation group 2.

[0030] See Figure 2 and Figure 3 The countercurrent heat exchange unit 1 is equipped with a spiral guide plate 11, which is welded to the inner wall of the tower body 4. The inclination angle of the spiral guide plate 11 is 15°. o The liquid material fed into the feed inlet 41 flows downward along the spiral guide plate 11, while the hot air introduced into the air inlet 42 also flows upward along the trajectory of the spiral guide plate 11. The material and the hot air form a counter-current state. The spiral guide plate 11 slows down the flow rate of the material, increases the contact time and contact area between the material and the hot air, and makes the heating of the material more uniform and effective.

[0031] The top of the tower body 4 is equipped with an outlet 44. The pipe connected to the outlet 44 and the pipe connected to the inlet 42 are both connected to a heat exchanger 5. The gas discharged from the outlet 44 retains the high temperature inside the drying tower. Further processing the gas at this time would waste this part of the heat energy. By exchanging heat between the discharged gas and the gas to be introduced, and pre-treating the gas to be introduced from the inlet 42, the waste of heat energy can be reduced to a certain extent, thus achieving energy saving.

[0032] See Figure 2 and Figure 4The oscillating evaporation unit 2 includes several parallel circular evaporation nets 21. The bottommost evaporation net 21 is fixed to the inner wall of the tower body 4 around its edge. Several oscillating springs 22 are provided between each pair of adjacent evaporation nets 21. Several vibrators 23 are provided at the lower end of the evaporation nets 21 and are connected to the inner wall of the tower body 4. The material flowing down from the countercurrent heat exchange unit 1 flows onto the evaporation nets 21 through the spiral guide plate 11. The contact between the material and the evaporation nets 21 further increases the contact area with the hot air. Since the material has been concentrated and has crystallized after the heat treatment of the countercurrent heat exchange unit 1, the oscillating springs 22 can oscillate up and down with the force of the material hitting the evaporation nets 21. The crystals that may be attached to the evaporation nets 21 are shaken off by the oscillation, preventing the material from crystallizing on the evaporation nets 21 and causing blockage. The vibrators 23 are set to open at specific times and have a set period to intermittently generate oscillation force on the evaporation nets 21 to prevent insufficient oscillation force of the oscillating springs 22 from causing some material to crystallize on the evaporation nets 21.

[0033] The tower body 4 is equipped with an air inlet 2 43, which is located between the vibrating evaporation group 2 and the loosening drying group 3. Due to the rising nature of hot air, the hot air introduced through air inlet 1 42 is less effective at drying the area below air inlet 1 42. Therefore, by providing air inlet 2 43, the hot air introduced through air inlet 2 43 further dries the material passing through the vibrating evaporation group 2, thus improving the evaporation and drying efficiency.

[0034] The fluffy drying unit 3 includes a rotary dryer 31, and a receiving hopper 47 is connected to the inner wall of the tower body 4. The receiving hopper 47 is located below the countercurrent heat exchange unit 1. The upper end of the rotary dryer 31 is connected to the receiving hopper 47, and the bottom end of the tower body 4 is provided with a discharge channel 45. The bottom end of the rotary dryer 31 is connected to the discharge channel 45. The inner wall of the rotary dryer 31 is provided with drying plates 32, which are fixed to the inner wall of the rotary dryer 31. The rotary dryer 31 includes a first support outer ring 311, a second support inner ring 312, and a third support outer ring 313. The upper and lower ends of the second support inner ring 312 are provided with rotary sliding connectors. The first support outer ring 311 and the second support outer ring 313 are respectively located on the rotary sliding connectors at the upper and lower ends of the second support inner ring 312. Several rolling columns 314 are provided between the first support outer ring 311 and the second support outer ring 313 and the second support inner ring 312. The upper end of the first support outer ring 311 is fixed to the lower end of the receiving hopper 47, and the lower end of the second support outer ring 313 is fixed to the upper end of the discharge channel 45. The tower body 4 has an opening at the loose drying group 3, and a rotating shaft 34 connected by a rotary motor 35 is provided outside the opening. A transmission belt 33 is sleeved around the rotating shaft 34, and the other end of the transmission belt 33 is sleeved around the inner support inner ring 312. The rotating motor 35 is connected to the rotating shaft 34 to make it rotate. The rotating shaft 34 drives the inner ring 312 of the support to rotate through the transmission belt 33. When the material enters the rotating dryer 31, it has mostly crystallized. The drying plates 32 in the rotating dryer 31 play a stirring role, breaking up the lumps in the material, making the material heat more evenly and the product more fluffy.

[0035] A star-shaped discharge valve 46 is installed at the outlet of the discharge channel 45 to prevent cold air backflow at the outlet of the discharge channel 45 from causing uneven heating and clumping of the material.

[0036] In summary, this embodiment utilizes the counter-current heat exchange group 1 to create a counter-current flow between the liquid material and hot air along the trajectory of the spiral guide plate 11. This slows down the material flow rate, increases the contact time and surface area between the material and hot air, and makes the heating of the material more uniform and effective. The oscillating evaporation group 2 allows the oscillating spring 22 to oscillate up and down with the force of the material impacting the evaporation net 21, causing crystals that may adhere to the evaporation net 21 to fall off, preventing material from crystallizing and causing blockage. The contact area between the material and the evaporation net 21 further increases the contact area with the hot air. The fluffing drying group 3 uses the rotating dryer 31 to stir and dry the incoming material, breaking up clumps in the crystallized material, making the material heat more uniform and the product more fluffy. The pipes connected to the outlet 44 and the inlet 42 are both connected to a heat exchanger 5, exchanging heat between the discharged gas and the incoming gas. This pre-treatment of the gas entering through the inlet 42 reduces heat waste to some extent, achieving energy-saving effects. This invention can effectively heat materials evenly, improve heating efficiency and quality, make products drier and fluffier, and save some heat energy, thus avoiding energy waste.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An energy-saving drying tower with a built-in spiral guide plate, comprising a tower body (4), characterized in that, The tower body (4) is provided with a counter-current heat exchange group (1), an oscillating evaporation group (2) and a fluffing drying group (3) from top to bottom. The tower body (4) is provided with a feed inlet (41) and an air inlet (42) from top to bottom. The feed inlet (41) is located higher than the counter-current heat exchange group (1). The air inlet (42) is located between the counter-current heat exchange group (1) and the oscillating evaporation group (2). The top of the tower body (4) is provided with an air outlet (44). The pipes connected to the air outlet (44) and the pipes connected to the air inlet (42) are both connected to a heat exchanger (5).

2. The energy-saving drying tower with a built-in spiral guide plate according to claim 1, characterized in that, The countercurrent heat exchange unit (1) is equipped with a spiral guide plate (11), which is welded to the inner wall of the tower body (4). The inclination angle of the spiral guide plate (11) is 15°. o .

3. The energy-saving drying tower with a built-in spiral guide plate according to claim 1, characterized in that, The oscillating evaporation group (2) includes several parallel circular evaporation nets (21), wherein the bottommost evaporation net (21) is fixed to the inner wall of the tower body (4) around its edge, and several oscillating springs (22) are provided between each two adjacent layers of the evaporation nets (21). Several vibrators (23) are provided at the lower end of the evaporation nets (21), and the vibrators (23) are connected to the inner wall of the tower body (4).

4. The energy-saving drying tower with a built-in spiral guide plate according to claim 1, characterized in that, The fluffy drying group (3) includes a rotary dryer (31), and a receiving hopper (47) is connected to the inner wall of the tower body (4). The receiving hopper (47) is located below the countercurrent heat exchange group (1). The upper end of the rotary dryer (31) is connected to the receiving hopper (47). The bottom end of the tower body (4) is provided with a discharge channel (45). The bottom end of the rotary dryer (31) is connected to the discharge channel (45).

5. An energy-saving drying tower with a built-in spiral guide plate according to claim 4, characterized in that, The inner wall of the rotary dryer (31) is provided with drying plates (32), and the drying plates (32) are fixed to the inner wall of the rotary dryer (31). The rotary dryer (31) includes a first support outer ring (311), a second support inner ring (312) and a second support outer ring (313). The upper and lower ends of the second support inner ring (312) are provided with rotary sliding connectors. The first support outer ring (311) and the second support outer ring (313) are respectively located on the rotary sliding connectors at the upper and lower ends of the second support inner ring (312). A number of rolling columns (314) are provided between the first support outer ring (311) and the second support outer ring (313) and the second support inner ring (312). The upper end of the first support outer ring (311) is fixed to the lower end of the receiving hopper (47), and the lower end of the second support outer ring (313) is fixed to the upper end of the discharge channel (45).

6. An energy-saving drying tower with a built-in spiral guide plate according to claim 5, characterized in that, The tower body (4) has an opening at the loose drying group (3) and a rotating shaft (34) connected by a rotating motor (35) outside the opening. A transmission belt (33) is sleeved around the rotating shaft (34), and the other end of the transmission belt (33) is sleeved around the inner ring (312) of the support.

7. An energy-saving drying tower with a built-in spiral guide plate according to claim 1, characterized in that, The tower body (4) is provided with an air inlet 2 (43), which is located between the oscillating evaporation group (2) and the fluffy drying group (3).

8. An energy-saving drying tower with a built-in spiral guide plate according to claim 4 or 5, characterized in that, A star-shaped unloading valve (46) is provided at the outlet of the discharge channel (45).

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