Device for carrying out drying treatment by using hot dry air
By utilizing the heat released from the absorption of water by concentrated sulfuric acid to dry damp materials, the problem of drying speed and energy consumption being affected by air humidity in existing technologies has been solved, achieving lower cost and higher efficiency in drying processes.
Patent Information
- Application Number
- CN202520171228.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-25
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-25
AI Technical Summary
In existing drying equipment, the drying speed and energy consumption of materials are greatly affected by air humidity, resulting in high drying costs and low efficiency.
The heat released during the absorption of water by concentrated sulfuric acid is used to dry damp materials. The concentrated sulfuric acid is connected to the drying unit through the first and second pipes. The concentrated sulfuric acid absorbs moisture in the air and releases heat to heat the drying gas, reducing dependence on external heat sources.
It reduces the cost of drying, increases drying speed and efficiency, reduces the need for external heat sources, and achieves drying operations with lower energy consumption.
Smart Images
Figure CN223840845U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concentrated sulfuric acid processing technology, and in particular to an apparatus for drying using hot dry air. Background Technology
[0002] In industrial production, it is often necessary to dry wet materials containing a certain amount of moisture, usually by heating and drying.
[0003] However, in existing drying equipment, water molecules in the material are carried away by the air in the form of water vapor after the temperature rises. Therefore, the drying speed and energy consumption are greatly affected by the air humidity, resulting in high drying costs and low efficiency. Utility Model Content
[0004] This utility model discloses an apparatus for drying using hot dry air, which at least partially improves the above-mentioned technical problems.
[0005] To solve the above problems, the present invention adopts the following technical solution:
[0006] This application provides an apparatus for drying using hot dry air. The apparatus includes: a first functional chamber, a third functional chamber, a first pipe, a drying unit, and a third pipe. The first functional chamber is used to contain concentrated sulfuric acid. The third functional chamber is connected to the first functional chamber and is used to contain concentrated sulfuric acid that may flow back from the first functional chamber to the first pipe. One end of the first pipe extends into the third functional chamber, and the other end is connected to the outside; the first pipe is used to input gas into the first functional chamber. The drying unit is connected to the first functional chamber via a second pipe and is used to dry damp materials. The third pipe is connected to the drying unit and is used to discharge the gas passing through the drying unit.
[0007] In one embodiment, the apparatus for drying with hot dry air further includes a heating unit disposed on the outer periphery of the second pipe and used to heat the gas inside the second pipe.
[0008] In one embodiment, the drying unit includes:
[0009] A second functional chamber, connected to both the second and third pipes, the second functional chamber having an inlet and an outlet; and
[0010] A conveying mechanism is disposed within the second functional cavity and extends out from the inlet and the outlet. The conveying mechanism is used to convey wet materials.
[0011] In one embodiment, the device for drying with hot dry air further includes a fan, which is disposed in the third duct and is used to extract humid air from the second functional chamber.
[0012] And / or, the third conduit has multiple connection ports communicating with the second functional cavity.
[0013] In one embodiment, the connection port between the third pipe and the second functional cavity is located in the middle of the conveying mechanism when projected perpendicularly to the conveying mechanism.
[0014] In one embodiment, the apparatus for drying with hot dry air further includes a third functional chamber disposed between the first functional chamber and the first pipe, the third functional chamber being used to contain concentrated sulfuric acid that may flow back from the first functional chamber to the first pipe.
[0015] In one embodiment, the apparatus for drying with hot dry air further includes:
[0016] A fourth conduit, the fourth conduit being connected to the first functional cavity and the third functional cavity; and
[0017] A pump body is disposed in the fourth pipeline and is used to pump concentrated sulfuric acid from the third functional chamber to the first functional chamber.
[0018] In one embodiment, the connection between the fourth conduit and the first functional cavity is close to or located at the top of the first functional cavity.
[0019] In one embodiment, the drying device using hot dry air further includes a first connecting pipe and a second connecting pipe, wherein the first connecting pipe is located near the top of the first functional chamber for pumping in concentrated sulfuric acid, and the second connecting pipe is located near the bottom of the first functional chamber for pumping out the lower concentration sulfuric acid after absorbing moisture to the absorption tower of the sulfuric acid plant to absorb SO3 and obtain concentrated sulfuric acid again.
[0020] Compared with the prior art, the technical solution adopted by this utility model can achieve the following beneficial effects:
[0021] 1. The drying apparatus using hot dry air provided in this application connects a first functional chamber to the outside world and a drying unit via a first pipe and a second pipe. The first functional chamber contains concentrated sulfuric acid. When gas is introduced into the first functional chamber through a third functional chamber via the first pipe, the concentrated sulfuric acid in the first functional chamber absorbs water from the air and releases heat. This heat is used to heat the gas in the first pipe, which is then used to dry the moist material in the drying unit. Finally, the dried gas can be discharged from the drying unit through the third pipe. Because the hot dry air drying apparatus provided in this application uses the heat generated by the absorption of water by concentrated sulfuric acid, it eliminates or reduces the need for an external heat source, thereby reducing the cost of drying water-containing materials. This solves the problem in existing drying apparatuses that rely entirely on external heat sources to generate large amounts of high-temperature gas to dry water-containing materials, resulting in lower energy consumption for drying water-containing materials.
[0022] 2. In the drying unit, the generated water vapor is removed more efficiently by using dry hot air, which makes the drying speed faster. Attached Figure Description
[0023] 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.
[0024] Figure 1 A schematic diagram of a device for drying using hot dry air is shown in one embodiment of this application.
[0025] Figure 2 This illustration shows a partial structural diagram of a drying unit, a second pipe, and a third pipe in an apparatus for drying with hot dry air according to an embodiment of this application.
[0026] In the diagram: 1. A device for drying with hot air; 10. First functional chamber; 110. Concentrated sulfuric acid; 20. First pipe; 30. Drying unit; 310. Second functional chamber; 311. Feed inlet; 312. Discharge outlet; 320. Conveying mechanism; 40. Second pipe; 410. Connection port; 50. Third pipe; 60. Heating unit; 70. Fan; 80. Third functional chamber; 3. Fourth pipe; 4. Pump body; 6. First connecting pipe; 7. Second connecting pipe. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0029] The inventive concept of this application is described below: In the industrial production of ferric phosphate, there is a step where the aqueous component of ferric phosphate dihydrate needs to be dried to retain only the ferric phosphate dihydrate. The aqueous component of ferric phosphate dihydrate contains approximately 40% water, which requires a large amount of heat for the drying process.
[0030] However, in existing drying devices, an external heat source is required to generate a large amount of high-temperature gas in order to dry the water-containing substances of ferric phosphate dihydrate. This makes the drying cost of the entire drying device for the water-containing substances of ferric phosphate dihydrate relatively high.
[0031] Furthermore, the inventors discovered that manufacturers of industrial-grade ferric phosphate typically also produce sulfuric acid, and dilute sulfuric acid absorbs SO3 to produce concentrated sulfuric acid. Sulfuric acid has extremely strong hygroscopic properties, and concentrated sulfuric acid releases a large amount of heat during the water absorption process. This heat is not fully utilized, resulting in energy loss.
[0032] Based on this, the inventors provide a device for drying with hot dry air. This device can utilize the heat generated during the absorption of water by concentrated sulfuric acid to dry the water-containing substances of ferric phosphate dihydrate. This allows the heat generated during the absorption of water by concentrated sulfuric acid to be fully utilized, which helps to reduce the drying cost of the water-containing substances of ferric phosphate dihydrate and improve the drying efficiency.
[0033] The following is in conjunction with the appendix Figures 1 to 2 The present application provides a detailed description of a device 1 for drying with hot dry air through specific embodiments and application scenarios.
[0034] Please see Figure 1 This application provides an apparatus 1 for drying using hot dry air. The apparatus may include: a first functional chamber 10, a third functional chamber 80, a first pipe 20, a second pipe 40, a drying unit 30, and a third pipe 50.
[0035] The first functional chamber 10 can be used to contain concentrated sulfuric acid 110, preferably 98% concentrated sulfuric acid. The third functional chamber 80 can be connected to the first functional chamber 10 and can be used to contain concentrated sulfuric acid 110 that may flow back from the first functional chamber 10 towards the first pipe 20. In a preferred embodiment, the volume of the third functional chamber 80 can be greater than or equal to the volume of the first functional chamber 10, so that even if all the concentrated sulfuric acid in the first functional chamber 10 flows back, it can be ensured that the concentrated sulfuric acid in the first functional chamber 10 will not flow to the outside of the entire device.
[0036] One end of the first pipe 20 can extend into the third functional chamber 80, and the other end is connected to the outside. The first pipe 20 can be used to input gas into the first functional chamber 10, for example, air can be directly input into the first functional chamber 10. It should be noted that the first pipe 20 is preferably able to extend below the liquid surface of concentrated sulfuric acid 110, so that the air can fully contact the concentrated sulfuric acid 110, thereby improving the water absorption efficiency of concentrated sulfuric acid 110 and ensuring that the air becomes dry after passing through concentrated sulfuric acid 110.
[0037] During the process of introducing air into the first functional chamber 10 through the first pipe 20, the moisture in the air can be absorbed by the concentrated sulfuric acid 110, thus diluting the concentrated sulfuric acid 110. It is understood that the dilution process of concentrated sulfuric acid 110 usually involves adding water to the acid to avoid explosion. However, in this embodiment, diluting the concentrated sulfuric acid 110 with water from the air precisely solves the aforementioned problem.
[0038] It should be noted that the embodiments of this application do not limit the specific form, structure and direction of the first pipe 20. For example, in some embodiments, the first pipe 20 can be set as a straight pipe, and in other embodiments, the first pipe 20 can also be set as a bent or curved channel. In such embodiments, when the first pipe 20 stops supplying air into the first functional cavity 10, the bent or curved structure can be used to avoid or reduce the damage caused by the backflow of concentrated sulfuric acid 110 in the first functional cavity 10.
[0039] Furthermore, the hot air drying device may also include a fourth pipe 3 and a pump body 4. The fourth pipe 3 can be connected to the first functional chamber 10 and the third functional chamber 80. The pump body 4 can be disposed in the fourth pipe 3 and used to pump the concentrated sulfuric acid 110 flowing back into the third functional chamber 80 back to the first functional chamber 10. It is understood that the connection between the fourth pipe 3 and the first functional chamber 10 can be close to the top of the first functional chamber 10 and located above the liquid surface of the concentrated sulfuric acid 110 in the first functional chamber 10. This can prevent the concentrated sulfuric acid 110 in the first functional chamber 10 from flowing into the third functional chamber 80 through the fourth pipe 3.
[0040] The second conduit 40 can be connected between the first functional chamber 10 and the drying unit 30, and is used to guide the dry, high-temperature air discharged from the first functional chamber 10 to the drying unit 30 for use by the drying unit 30. This application embodiment does not limit the specific form, structure, or direction of the second conduit 40; for details, please refer to the relevant description of the first conduit, which will not be repeated here.
[0041] Furthermore, in one embodiment, the second pipe 40 may have multiple connection ports 410 communicating with the second functional cavity 310. This allows the dry, high-temperature air from the second pipe 40 to be evenly distributed within the second functional cavity 310, thereby facilitating the thorough and uniform drying of moist materials such as ferric phosphate dihydrate within the drying unit 30. This application does not limit the specific number of connection ports 410; for example, it may be 2, 3, or 4, and can be set according to actual conditions.
[0042] Please see Figure 2 The drying unit 30 can be connected to the first functional cavity 10 through the second pipe 40. The drying unit 30 can be used to dry damp materials. This application does not limit the specific form of the drying unit 30. For example, in one embodiment, the drying unit 30 can be a box, which can be used to hold damp materials to be dried, such as ferric phosphate dihydrate containing water. The second pipe 40 can introduce dry, high-temperature air into the drying unit 30 to dry the damp materials, such as ferric phosphate dihydrate containing water.
[0043] In one embodiment, the drying unit 30 may include a second functional chamber 310 and a conveying mechanism 320. The second functional chamber 310 may be connected to a second pipe 40 and a third pipe 50. The second functional chamber 310 may have an inlet 311 and an outlet 312. That is, in this embodiment, the second functional chamber 310 may be configured as an open structure. It is understood that the size of the inlet 311 and the outlet 312 may be made as small as possible to allow the passage of moist materials such as ferric phosphate dihydrate containing water, so as to avoid the large amount of hot air flowing out of the inlet 311 and the outlet 312, which would cause energy waste or a large amount of humid air entering, which would reduce the drying efficiency.
[0044] The conveying mechanism 320 can be disposed within the second functional cavity 310, extending into an inlet 311 and an outlet 312. The conveying mechanism 320 can be used to convey moist materials, such as ferric phosphate dihydrate containing water. This application does not limit the specific arrangement of the conveying mechanism 320, nor does it limit the specific positions of the inlet 311 and outlet 312. In a preferred embodiment, the conveying mechanism 320 can be configured as a straight track, with the outlet 312 and inlet 311 respectively located on opposite surfaces of the second functional cavity 310. In some other embodiments, the conveying mechanism 320 can also be configured as an "L"-shaped track, with the outlet 312 and inlet 311 located on adjacent surfaces of the second functional cavity 310. The specific arrangement can be determined based on actual conditions and is not limited here.
[0045] The third pipe 50 can be connected to the drying unit 30 and is used to discharge the gas that has passed through the drying unit 30. Specifically, in this embodiment, the third pipe 50 can be connected to and communicate with the second functional cavity 310. This application embodiment does not limit the specific form, structure and direction of the third pipe 50. For details, please refer to the relevant description of the first pipe, which will not be repeated here.
[0046] Furthermore, the embodiments of this application do not limit the specific connection position between the third pipe 50 and the second functional cavity 310. In a preferred embodiment, the third pipe 50 can be connected to the surface of the second functional cavity 310 away from the second pipe 40. This allows the dry, high-temperature gas entering the second functional cavity 310 from the second pipe 40 to stay in the second functional cavity 310 for a longer time, which is beneficial for fully drying the moist material such as ferric phosphate dihydrate in the second functional cavity 310.
[0047] Furthermore, in one embodiment, the device 1 for drying with hot dry air may further include a fan 70, which may be installed in the third duct 50 and used to extract air from the second functional chamber 310. It is understood that since the dry high-temperature air absorbs moisture and becomes humid during the drying process of the ferric phosphate dihydrate, it is not conducive to continuing to dry the ferric phosphate dihydrate. Therefore, the fan 70 can accelerate the air circulation in the second functional chamber 310, specifically by accelerating the entry of the dry high-temperature air into the second functional chamber 310 and expelling the humid high-temperature air from the second functional chamber 310. This can further improve the drying efficiency of humid materials such as ferric phosphate dihydrate.
[0048] Furthermore, in one embodiment, the connection between the third pipe 50 and the second functional chamber 310 is located in the middle of the conveying mechanism 320 when projected perpendicularly to the conveying mechanism 320. It should be noted that since the fan 70 draws gas from the second functional chamber 310, some of the dried, moist material, such as the water-containing powder of ferric phosphate dihydrate, will be drawn to the third pipe 50 under the influence of the fan 70. However, the third pipe 50 contains humid, high-temperature air, so some of the dried ferric phosphate dihydrate powder will adhere to the moisture in the air and settle, falling back onto the conveying mechanism 320 for further drying. This prevents the ferric phosphate dihydrate from being sent out of the outlet 312 of the second functional chamber 310 without being fully dried. Therefore, the aforementioned location of the third pipe 50 ensures that the ferric phosphate dihydrate sent from the outlet 312 of the second functional chamber 310 is fully dried.
[0049] Furthermore, in some embodiments, the hot air drying apparatus may also include a heating unit 60, which may be disposed on the outer periphery of the second pipe 40 and used to heat the gas inside the second pipe 40. It is understood that as the concentrated sulfuric acid 110 in the first functional chamber 10 absorbs excessive water and is diluted, the released heat gradually decreases. Therefore, when the heat released by the concentrated sulfuric acid 110 is insufficient, the gas inside the second pipe 40 can be heated by the external heating unit 60, thus ensuring the degree of drying of the water-containing substances in ferric phosphate dihydrate.
[0050] In other embodiments, the apparatus 1 for drying with hot dry air may further include a first connecting pipe 6 and a second connecting pipe 7, wherein the first connecting pipe 6 is located near the top of the first functional chamber 10 and is used to pump in concentrated sulfuric acid, and the second connecting pipe 7 is located near the bottom of the first functional chamber 10 and is used to pump out the lower concentration sulfuric acid after absorbing moisture to the absorption tower of the sulfuric acid plant to absorb SO3 and obtain concentrated sulfuric acid again.
[0051] The device 1 for drying with hot dry air provided in this application embodiment connects a first functional chamber 10 to the outside world and a drying unit 30 via a first pipe 20 and a second pipe 40. The first functional chamber 10 can contain concentrated sulfuric acid 110. When gas is introduced into the first functional chamber 10 through the first pipe 20, the concentrated sulfuric acid 110 in the first functional chamber 10 can absorb water in the air and release heat. This heat can be used to heat the gas in the first pipe 20, which can then be used to dry the wet material in the drying unit 30. Finally, the dried gas can be discharged from the drying unit 30 through a third pipe 50. The hot air drying device provided in this application uses the heat generated by concentrated sulfuric acid 110 absorbing water, which eliminates or reduces the need for an external heat source. This helps to reduce the cost of drying water-containing substances and solves the problem in the prior art that an external heat source is required to generate a large amount of high-temperature gas to dry the water-containing substances of ferric phosphate dihydrate, which makes the drying cost of ferric phosphate dihydrate high.
[0052] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0053] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
[0054] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. An apparatus for drying using hot dry air, characterized in that, include: A first functional chamber is used to contain concentrated sulfuric acid; A third functional chamber, which is connected to the first functional chamber, is used to contain concentrated sulfuric acid that may flow back from the first functional chamber to the first pipe. A first pipe, one end of which extends into the third functional cavity and the other end is connected to the outside, is used to input gas into the first functional cavity; A drying unit is connected to the first functional chamber via a second pipe, and the drying unit is used to dry damp materials; as well as The third pipe is connected to the drying unit and is used to discharge the gas that has passed through the drying unit from the drying unit.
2. The apparatus for drying with hot dry air according to claim 1, characterized in that, The device for drying with hot dry air further includes a heating unit disposed on the outer periphery of the second pipe and used to heat the gas in the second pipe.
3. The apparatus for drying with hot dry air according to claim 1, characterized in that, The drying unit includes: A second functional chamber, connected to both the second and third pipes, the second functional chamber having an inlet and an outlet; and A conveying mechanism is disposed within the second functional cavity and extends out from the inlet and the outlet. The conveying mechanism is used to convey wet materials.
4. The apparatus for drying with hot dry air according to claim 3, characterized in that, The device for drying with hot dry air further includes a fan, which is installed in the third duct and is used to extract humid air from the second functional chamber.
5. The apparatus for drying with hot dry air according to claim 3, characterized in that, The second pipe has multiple connection ports that communicate with the second functional cavity.
6. The apparatus for drying with hot dry air according to claim 3, characterized in that, The connection port between the third pipe and the second functional cavity is located in the middle of the conveying mechanism when projected perpendicularly to the conveying mechanism.
7. The apparatus for drying with hot dry air according to claim 1, characterized in that, The volume of the third functional cavity is greater than or equal to the volume of the first functional cavity.
8. The apparatus for drying with hot dry air according to claim 1, characterized in that, The apparatus for drying with hot dry air further includes: A fourth conduit, the fourth conduit being connected to the first functional cavity and the third functional cavity; and A pump body is disposed in the fourth pipeline and is used to pump concentrated sulfuric acid from the third functional chamber to the first functional chamber.
9. The apparatus for drying with hot dry air according to claim 8, characterized in that, The connection between the fourth pipe and the first functional cavity is close to or located at the top of the first functional cavity.
10. The apparatus for drying with hot dry air according to claim 1, characterized in that, The device for drying with hot dry air further includes a first connecting pipe and a second connecting pipe, wherein the first connecting pipe is located near the top of the first functional chamber and is used to pump in concentrated sulfuric acid, and the second connecting pipe is located near the bottom of the first functional chamber and is used to pump out the lower concentration sulfuric acid after absorbing moisture to the absorption tower of the sulfuric acid plant to absorb SO3 and obtain concentrated sulfuric acid again.