Drying and scattering device for high-moisture materials and drying method using drying and scattering device

Abstract

The invention discloses a high-moisture material drying and scattering device and a drying method using the high-moisture material drying and scattering device. The high-moisture material drying and scattering device comprises a device body and a scattering device body located in the device body, and the device body is provided with a feeding port, a discharging port, an air inlet and an air outlet, a first drying cavity and a second drying cavity which are used for drying materials are formed in the device body, the first drying cavity is located above the scattering device, the feeding port is communicated with the first drying cavity, the second drying cavity is located between the air inlet and the scattering device, the second drying cavity is located under the scattering device, and a discharging port is formed in the second drying cavity. The drying and scattering device for the high-moisture materials can effectively dry the high-moisture materials entering the vertical mill.

Description

Technical Field

[0001] The present invention relates to the field of high-moisture inorganic solid waste disposal, and in particular to a drying and breaking device for high-moisture materials and a drying method using the same. Background Art

[0002] A large amount of solid waste is generated during the industrial production process. For environmental protection reasons, these solid wastes need to be disposed of. The more commonly used method is to add these materials to the cement production system for coordinated disposal.

[0003] When some high-moisture solid waste is added to the cement raw material system for treatment, it needs to enter the raw mill system first. However, since the high-moisture solid waste materials contain more water, after being added to the vertical mill system, these high-moisture materials will mix with the dry raw meal powder on the vertical mill grinding disc, resulting in uneven viscosity of the material layer on the vertical mill grinding disc, and thus the thickness of the material layer on the vertical mill grinding disc changes due to the change in viscosity of the mixed material. This will cause the working condition of the vertical mill to be unstable and the vibration to increase, and ultimately lead to a decrease in the production time of the vertical mill, an increase in process power consumption, and a decrease in work efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a drying and breaking up device for high-moisture materials and a drying method using the same. The drying and breaking up device for high-moisture materials can effectively dry the high-moisture materials entering the vertical mill.

[0005] In order to achieve the above-mentioned object, the present invention provides a drying and dispersing device for high-moisture materials, comprising a device body and a dispersing device located in the device body, wherein the device body is provided with a feeding port, a discharging port, and an air inlet and an air outlet respectively located at two ends;

[0006] A first drying chamber and a second drying chamber for drying materials are formed in the device body. The first drying chamber is located above the scattering device, and the feeding port is connected to the first drying chamber. The second drying chamber is located between the air inlet and the scattering device, and the second drying chamber is located directly below the scattering device. The second drying chamber is provided with a discharge port.

[0007] Preferably, the first drying chamber is arranged at an angle, and the feeding port and the breaking device are respectively located at two ends of the first drying chamber.

[0008] Preferably, a shrinking pipeline coaxially arranged with the scattering device is arranged above the scattering device, the shrinking pipeline includes a shrinking section and a straight tube section connected to the shrinking section, the end of the shrinking section facing the scattering device is set as the large end, the end of the shrinking section facing the drying chamber is set as the small end, and the straight tube section is connected to the small end.

[0009] Preferably, the second drying chamber is connected to the device body through a lift.

[0010] Preferably, the connection between the elevator and the device body is located above the connection between the straight tube section and the drying chamber.

[0011] The present invention also provides a drying method using the drying and breaking device for high-moisture materials, comprising:

[0012] Step 1: Add high-moisture materials into the drying chamber through the feeding port, start the scattering device, and the high-temperature gas enters the device body through the air inlet;

[0013] Step 2: Part of the material in the second drying chamber is input into the vertical mill inlet, and the other part enters the device body through the elevator;

[0014] Step 3: The gas obtained after gas-solid separation of the mixed gas discharged from the air outlet is combined with the exhaust gas from the raw material mill, and the separated solid is input into the outlet of the vertical mill.

[0015] Preferably, a cyclone is used in step 3 for gas-solid separation.

[0016] Preferably, in step 2, a filtering device is provided at the material outlet in the second drying chamber, small-sized materials enter the vertical mill inlet, and large-sized materials enter the elevator.

[0017] According to the above technical scheme, the high-temperature gas entering from the air inlet of the present invention flows toward the air outlet through the device body. When passing through the first drying chamber, the high-temperature gas will encounter the high-moisture material fed through the feeding port. Under the stirring and drying action of the high-temperature gas, the small particles in the high-moisture material can be dried in time. After drying, the weight of the small particle material becomes lighter, and it can move together with the high-temperature gas, and finally flow out from the air outlet.

[0018] Preferably, the feeding port is arranged at the upper part of the first drying chamber, and the high-moisture material falls into the first drying chamber under the action of gravity. The high-moisture material moving downward enters the first drying chamber and meets the high-temperature gas moving upward. Under the action of the high-temperature gas, these high-moisture materials are dried. During the drying process, some small-sized materials have been dried in the first drying chamber due to their large specific surface area, and then enter the air outlet with the high-temperature gas.

[0019] Preferably, the first drying chamber is set to be larger in size so that the high-temperature gas flow rate in the first drying chamber is smaller, so that small-mass materials can stay in the first drying chamber for a longer time, which is beneficial to improving the drying effect of small-mass or small-particle materials.

[0020] Large-sized materials cannot move upward with the hot air due to their heavy weight, and will gradually accelerate to fall into the scattering device below. Preferably, the scattering device is set to have a certain length. During the process of the scattering device scattering the materials, since the high-temperature gas always keeps flowing in the drying and scattering device for high-moisture materials, the high-temperature gas can dry the materials at the same time. After passing through the scattering device, these materials will fall into the second drying chamber below the scattering device, and the high-temperature gas entering from the air inlet will dry these materials in the second drying chamber.

[0021] Preferably, a corner is provided between the air inlet and the scattering device, and the corner is provided directly below the scattering device, and the second drying chamber is located at the corner. The high-temperature gas turns at the corner, and the residence time of the high-temperature gas in the second drying chamber can be prolonged by controlling the turning of the high-temperature gas, thereby improving the drying effect of the high-temperature gas on large-sized materials.

[0022] The second drying chamber is smaller in size than the first drying chamber and is closer to the air inlet. Therefore, the high-temperature gas in the second drying chamber has a higher temperature and a faster speed. The large particles in the second drying chamber are dried by continuous blowing of the high-temperature gas.

[0023] After being dried, the material in the second drying chamber is sent to the vertical mill through the discharge port for grinding.

[0024] The drying and breaking device for high-moisture materials utilizes the first drying chamber and the second drying chamber to dry large-sized and small-sized materials respectively. The small-sized materials are sent out through the air outlet after drying, and the large-sized materials are sent into the vertical mill through the discharge port for grinding.

[0025] In summary, the high-moisture material drying and dispersing device can reliably dry the high-moisture material entering the vertical mill, thereby reliably avoiding the influence of the high-moisture material on the working condition of the vertical mill equipment.

[0026] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of a drying and dispersing device for high-moisture materials;

[0029] Figure 2 is a flow chart of a drying method;

[0030] Figure 3 It is a cross-sectional view of a breaking device.

[0031] Description of Reference Numerals

[0032] 1Breaker 2Feeding port

[0033] 3 air inlets 4 air outlets

[0034] 5 The first drying chamber 61 shrinkage section

[0035] 62 straight section 7 second drying chamber

[0036] 8 elevator 9 cyclone

[0037] 11 Breaking up the pieces 12 Rotating shaft

[0038] 13 Shell DETAILED DESCRIPTION

[0039] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0040] In the present invention, unless otherwise stated, directional words contained in the terms such as "above, inclined, both ends, directly below, between, front end" merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0041] See also Figure 1 The drying and dispersing device for high-moisture materials comprises a device body and a dispersing device located in the device body, and the device body is provided with a feeding port, a discharging port, and an air inlet and an air outlet respectively located at two ends;

[0042] A first drying chamber and a second drying chamber for drying materials are formed in the device body. The first drying chamber is located above the scattering device, and the feeding port is connected to the first drying chamber. The second drying chamber is located between the air inlet and the scattering device, and the second drying chamber is located directly below the scattering device. The second drying chamber is provided with a discharge port.

[0043] Through the implementation of the above technical solution, the high-temperature gas entering from the air inlet flows toward the air outlet through the device body. When passing through the first drying chamber, the high-temperature gas will encounter the high-moisture material fed through the feeding port. Under the stirring and drying action of the high-temperature gas, the small particles in the high-moisture material can be dried in time. After drying, the small particles become lighter and can move together with the high-temperature gas, and finally flow out from the air outlet.

[0044] Preferably, the feeding port is arranged at the upper part of the first drying chamber, and the high-moisture material falls into the first drying chamber under the action of gravity. The high-moisture material moving downward enters the first drying chamber and meets the high-temperature gas moving upward. Under the action of the high-temperature gas, these high-moisture materials are dried. During the drying process, some small-sized materials have been dried in the first drying chamber due to their large specific surface area, and then enter the air outlet with the high-temperature gas.

[0045] Preferably, the first drying chamber is set to be larger in size so that the high-temperature gas flow rate in the first drying chamber is smaller, so that small-mass materials can stay in the first drying chamber for a longer time, which is beneficial to improving the drying effect of small-mass or small-particle materials.

[0046] Large-sized materials cannot move upward with the hot air due to their heavy weight, and will gradually accelerate to fall into the scattering device below. Preferably, the scattering device is set to have a certain length. During the process of the scattering device scattering the materials, since the high-temperature gas always keeps flowing in the drying and scattering device for high-moisture materials, the high-temperature gas can dry the materials at the same time. After passing through the scattering device, these materials will fall into the second drying chamber below the scattering device, and the high-temperature gas entering from the air inlet will dry these materials in the second drying chamber.

[0047] Preferably, a corner is provided between the air inlet and the scattering device, and the corner is provided directly below the scattering device, and the second drying chamber is located at the corner. The high-temperature gas turns at the corner, and the residence time of the high-temperature gas in the second drying chamber can be prolonged by controlling the turning of the high-temperature gas, thereby improving the drying effect of the high-temperature gas on large-sized materials.

[0048] The second drying chamber is smaller in size than the first drying chamber and is closer to the air inlet. Therefore, the high-temperature gas in the second drying chamber has a higher temperature and a faster speed. The large particles in the second drying chamber are dried by continuous blowing of the high-temperature gas.

[0049] After being dried, the material in the second drying chamber is sent to the vertical mill through the discharge port for grinding.

[0050] The drying and breaking device for high-moisture materials utilizes the first drying chamber and the second drying chamber to dry large-sized and small-sized materials respectively. The small-sized materials are sent out through the air outlet after drying, and the large-sized materials are sent into the vertical mill through the discharge port for grinding.

[0051] In summary, the high-moisture material drying and dispersing device can reliably dry the high-moisture material entering the vertical mill, thereby reliably avoiding the influence of the high-moisture material on the working condition of the vertical mill equipment.

[0052] In this embodiment, preferably, the first drying chamber is arranged at an angle, and the feeding port and the breaking device are respectively located at two ends of the first drying chamber.

[0053] The first drying chamber is tilted so that the materials entering from the feeding port will collide with the inner wall of the drying chamber, thereby achieving the first impact dispersion of large-sized materials. After this dispersion, large-sized materials may be disassembled, while small-sized materials that stick to each other may be broken up. Therefore, the input materials can be reliably dispersed through the first impact dispersion, which is conducive to more heat exchange between the materials and the high-temperature gas, so that the materials can obtain better drying effect in the first drying chamber.

[0054] Preferably, a certain height difference is set between the feeding port and the inner wall of the first drying chamber. Through this height difference, the material fed through the feeding port can have a certain initial velocity when hitting the inner wall of the first drying chamber, so that the material has a greater impulse when colliding, thereby obtaining a better dispersion effect.

[0055] After colliding with the inner wall of the first drying chamber, large-sized materials will slide downward along the inclined inner wall of the first drying chamber. After sliding to the end of the inner wall, they will hit other inner walls of the first drying chamber under the action of inertia, achieving a second impact dispersion, and then fall into the scattering device below.

[0056] Therefore, by setting the first drying chamber to be inclined, the large-sized materials can be impacted and dispersed multiple times before entering the dispersing device, which is beneficial to improving the dispersing effect of the dispersing device.

[0057] In this embodiment, preferably, a shrinking pipeline coaxially arranged with the scattering device is arranged above the scattering device, and the shrinking pipeline includes a shrinking section and a straight tube section connected to the shrinking section, the end of the shrinking section facing the scattering device is set as a large end, the end of the shrinking section facing the first drying chamber is set as a small end, and the straight tube section is connected to the small end.

[0058] The scattering device includes a rotating shaft, a housing, and a scattering piece connected to the rotating shaft and the housing. During the rotation of the rotating shaft, the scattering piece rotates with the rotating shaft. During the rotation of the scattering piece, large-sized materials continuously fall and hit the scattering piece. As the scattering device rotates, the scattering device is set to a certain height, so that when passing through the scattering device, the materials will be reliably scatter by the scattering piece.

[0059] Preferably, if the hardness of the material to be scattered is not large, a blade capable of cutting the material can be provided on the side of the scattering piece facing the material. The scattering piece with the blade can achieve a better effect of scattering the material.

[0060] Preferably, in order to achieve a better breaking up effect, a multi-stage breaking up device can be arranged to work in series. The breaking up device that first contacts the material can be arranged to be a breaking up device with fewer breaking up pieces, which has better permeability and can perform preliminary breaking up of large-sized materials. A breaking up device with more breaking up pieces can be arranged after the breaking up device, which can break up the material into smaller sizes, but at the same time the permeability will be worse. Therefore, using two breaking up devices in series can effectively improve the breaking up effect of the breaking up device and improve the permeability of the breaking up device as much as possible.

[0061] As the scattering device rotates, the materials that fall into the scattering device will rotate with the scattering device, and some materials with smaller mass will return to the shrink pipe after hitting the scattering device. By setting the shrink section, part of the ejected materials can be blocked and fall back into the scattering device below.

[0062] The diameter of the straight section of the shrinking tube is smaller than that of the shrinking section, so the gas flow rate is higher and the pressure is lower. Therefore, a certain pressure difference will appear in the diameter-changing position of the shrinking tube. If there are materials with smaller mass among the ejected materials, they may enter the straight section under the action of airflow and pressure difference, and then quickly enter the first drying chamber above.

[0063] In this embodiment, preferably, the second drying chamber is connected to the device body through a lift.

[0064] The large-sized materials falling into the second drying chamber can enter the device body again through the elevator and be dried again in the device body, thereby avoiding the undried materials in the second drying chamber from being output to the vertical mill.

[0065] Preferably, a filter is provided at the discharge port to filter the material. The material in the second drying chamber can be divided into large material and small material according to the size of the material. Small material is easier to dry than large material. Therefore, the small material filtered out by the filter can be sent to the vertical mill equipment, but the large material filtered out by the filter needs to be re-entered into the drying and breaking device of high-moisture material for drying. In this way, the material in the second drying chamber can be separated very conveniently to prevent the undried material from entering the vertical mill system.

[0066] In this embodiment, preferably, the connection between the elevator and the device body is located above the connection between the straight tube section and the first drying chamber.

[0067] A certain height needs to be set between the elevator and the scattering device. When the elevator puts large materials into the device body, these materials have a certain initial velocity after a certain height of free fall. When they hit the scattering device, a better scattering effect can be obtained.

[0068] The impact of large materials on the scattering device will also cause the scattering device itself to vibrate, thereby achieving a cleaning effect on the scattering device. High-moisture materials may adhere to the scattering device due to their certain viscosity. Under the drying effect of high-temperature gas, these attached materials may crack due to drying. With the continuous impact of large-sized materials, these cracked materials will detach from the scattering device and fall into the second drying chamber, and then be discharged to the vertical mill through the discharge port.

[0069] The present invention also provides a drying method using the drying and breaking device for high-moisture materials, comprising:

[0070] Step 1: Add high-moisture materials into the drying chamber through the feeding port, start the scattering device, and the high-temperature gas enters the device body through the air inlet;

[0071] Step 2: Part of the material in the second drying chamber is input into the vertical mill inlet, and the other part enters the device body through the elevator;

[0072] Step 3: The gas obtained after gas-solid separation of the mixed gas discharged from the air outlet is combined with the exhaust gas from the raw material mill, and the separated solid is input into the outlet of the vertical mill.

[0073] The use of a drying and breaking up device for high-moisture materials can not only dry the materials but also separate the small-sized materials from the large-sized materials in the materials through high-speed gas. Some smaller materials that are easy to dry will enter the air outlet along with the high-temperature gas and leave the drying and breaking up device for high-moisture materials. Other large-particle materials that are difficult to dry will be broken up by the breaking up device and fall into the second drying chamber below to continue drying.

[0074] The mixed gas discharged through the air outlet contains solid dust. After being separated by gas-solid separation measures, the solid dust is sent to the discharge port of the vertical mill and used as raw material for cement production together with the powder obtained from the vertical mill. The gas after gas-solid separation is sent to merge with the exhaust gas from the raw meal mill and is purified together with the exhaust gas from the raw meal mill. Only after the purification treatment can the gas be discharged into the environment.

[0075] Part of the large-sized materials entering the second drying chamber that have been dried will enter the vertical mill, and the other undried materials will enter the drying and dispersing device for high-moisture materials again through the elevator for secondary dispersing and secondary drying. Preferably, a filtering device is set at the outlet of the second drying chamber to screen the materials in the second drying chamber. Large-sized materials are not easy to dry due to their small specific surface area, so they will be sent to the elevator for secondary drying, while smaller-sized materials have a large specific surface area and are easy to dry. After being screened by the filtering device, they can directly enter the vertical mill.

[0076] In this embodiment, preferably, a cyclone is used for gas-solid separation in step 3. The cyclone can achieve gas-solid separation in a high temperature environment, and the separated waste gas can also meet the treatment requirements of the raw mill waste gas, so the waste gas treated by the cyclone can be directly input into the raw mill waste gas pipeline and merge with the raw mill waste gas.

[0077] In this embodiment, preferably, in step 2, a filtering device is provided at the material outlet in the second drying chamber, small-sized materials enter the vertical mill inlet, and large-sized materials enter the elevator.

[0078] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0079] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0080] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A drying and breaking up device for high-moisture materials, characterized in that: The device comprises a device body and a dispersing device (1) located inside the device body, wherein the device body is provided with a feeding port (2), a discharging port, and an air inlet (3) and an air outlet (4) located at two ends respectively; A first drying chamber (5) and a second drying chamber (7) for drying materials are formed in the device body. The first drying chamber (5) is located above the scattering device (1). The feeding port (2) is connected to the first drying chamber (5). The second drying chamber (7) is located between the air inlet (3) and the scattering device (1). The second drying chamber (7) is located directly below the scattering device (1). The second drying chamber (7) is provided with a discharge port.

2. The drying and breaking up device for high-moisture materials according to claim 1 is characterized in that: The first drying chamber (5) is arranged at an angle, and the feeding port (2) and the breaking device (1) are respectively located at two ends of the first drying chamber (5).

3. The drying and breaking up device for high-moisture materials according to claim 2 is characterized in that: A constricted pipe coaxially arranged with the scattering device (1) is arranged above the scattering device (1), the constricted pipe comprising a constricted section (61) and a straight section (62) connected to the constricted section (61), the end of the constricted section (61) facing the scattering device (1) being arranged as a large end, the end of the constricted section (61) facing the drying chamber being arranged as a small end, and the straight section (62) being connected to the small end.

4. The drying and breaking up device for high-moisture materials according to claim 3 is characterized in that: The second drying chamber (7) is connected to the device body via a lift (8).

5. The drying and breaking up device for high-moisture materials according to claim 4, characterized in that: The connection between the elevator (8) and the device body is located above the connection between the straight tube section (62) and the drying chamber.

6. A drying method using the drying and breaking up device for high-moisture materials according to claim 5, characterized in that: include: Step 1: Add high-moisture materials into the drying chamber through the feeding port (2), start the dispersing device (1), and high-temperature gas enters the device body through the air inlet (3); Step 2: Part of the material in the second drying chamber (7) is input into the inlet of the vertical mill, and the other part enters the device body through the elevator (8); Step 3: The mixed gas discharged from the air outlet (4) is separated into gas and solid, and the gas obtained is combined with the exhaust gas from the raw material mill, and the separated solid is input into the outlet of the vertical mill.

7. The drying method according to claim 6, characterized in that: In step 3, a cyclone (9) is used for gas-solid separation.

8. The drying method according to claim 6, characterized in that: In step 2, a filtering device is provided at the material outlet in the second drying chamber (7), small-sized materials enter the vertical mill inlet, and large-sized materials enter the elevator (8).

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