An expanded perlite preheating device

Abstract

This utility model discloses an expanded perlite preheating device, including an expansion furnace, a heat exchange cylinder, a storage tank, and a transfer silo. A feed hopper is located at the bottom of the expansion furnace, and a mixing and conveying pipe is located at the top of the expansion furnace. The mixing and conveying pipe passes through the heat exchange cylinder, which has a heat exchange channel with an inlet and an outlet. The heat exchange channel is not connected to the inner cavity of the heat exchange cylinder. The outlet of the storage tank is connected to the inlet of the heat exchange channel, and the outlet of the heat exchange channel is connected to the inlet of the transfer silo via a pipe. The outlet of the transfer silo adds material to the feed hopper via a pipe. The beneficial effects of this utility model are: the heat exchange channel within the heat exchange cylinder allows the perlite powder to exchange heat with the waste heat of the flue gas, thus preheating the perlite powder before it enters the expansion furnace, reducing energy consumption and improving the utilization rate of waste heat from the flue gas.

Description

Technical Field

[0001] This utility model relates to the expansion of perlite, and in particular to a preheating device for expanded perlite. Background Technology

[0002] In the production of desulfurized gypsum, expanded perlite is required. During the pretreatment process, the perlite is ground and sieved to form two specifications: small particles and large particles. Then, it is put into an expansion furnace for expansion. The expanded perlite powder is then piled up and used to produce desulfurized gypsum.

[0003] The flue gas coming out of the extrusion furnace has a high temperature. If it is simply left to dissipate heat naturally in the air, it will cause heat loss and the natural heat dissipation efficiency is slow. At the same time, the perlite powder needs to be heated and expanded after entering the extrusion furnace. However, the perlite powder at room temperature takes a long time to be heated after entering the extrusion furnace, which leads to low extrusion efficiency and high heat consumption of the perlite powder.

[0004] After long-term research, the inventors improved the perlite powder expansion device from the perspective of energy saving and proposed an expanded perlite preheating device. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an expanded perlite preheating device.

[0006] The purpose of this utility model is achieved through the following technical solution: an expanded perlite preheating device, comprising an expansion furnace, a heat exchange cylinder, a storage tank, and a transfer hopper. A feeding hopper is provided at the bottom of the expansion furnace, and a mixing conveying pipe is provided at the top of the expansion furnace. The mixing conveying pipe passes through the heat exchange cylinder, and a heat exchange channel is provided inside the heat exchange cylinder. The heat exchange channel is provided with an inlet and an outlet, and the heat exchange channel is not connected to the inner cavity of the heat exchange cylinder. The outlet of the storage tank is connected to the inlet of the heat exchange channel, and the outlet of the heat exchange channel is connected to the inlet of the transfer hopper through a pipe. The outlet of the transfer hopper adds material to the feeding hopper through a pipe.

[0007] Optionally, the heat exchange cylinder has an upper channel and a lower channel inside its wall. The upper channel has a feed inlet at its feed end and a discharge outlet at its discharge outlet. The end of the upper channel away from the feed inlet and the end of the lower channel away from the discharge outlet are connected by an annular channel.

[0008] Optionally, a first screw conveyor is installed between the storage tank and the inlet of the heat exchange channel, and an air pump is installed on the first screw conveyor.

[0009] Optionally, a second screw conveyor is installed between the transfer bin and the feed inlet.

[0010] Optionally, a first solenoid valve is installed at the bottom of the storage tank.

[0011] Optionally, a second solenoid valve is installed at the bottom of the transit compartment.

[0012] The present invention has the following advantages: The expanded perlite preheating device of the present invention has a heat exchange channel in the heat exchange cylinder. The perlite powder exchanges heat with the waste heat of the flue gas in the heat exchange channel, so that the perlite powder can be preheated before entering the expansion furnace, thereby reducing energy consumption and improving the utilization rate of waste heat of flue gas. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional schematic diagram of the heat exchange cylinder;

[0015] Figure 3 for Figure 2 Schematic diagram of the cross section of AA;

[0016] Figure 4 for Figure 2 Cross-sectional view of BB;

[0017] Figure 5 for Figure 2 Cross-sectional view of CC;

[0018] In the diagram, 1-storage tank, 2-first screw conveyor, 3-air pump, 4-heat exchange cylinder, 5-second solenoid valve, 6-heat exchange channel, 7-mixing conveying pipe, 8-transfer silo, 9-second screw conveyor, 10-feed hopper, 11-expansion furnace, 12-first solenoid valve, 61-upper channel, 62-lower channel, 63-inner cavity, 64-annular channel. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1As shown, an expanded perlite preheating device includes an expansion furnace 11, a heat exchange cylinder 4, a storage tank 1, and a transfer chamber 8. A feed hopper 10 is provided at the bottom of the expansion furnace 11. The expansion furnace 11 is existing equipment, using bottom combustion. The flue gas after combustion and the calcined perlite are discharged through the top of the expansion furnace 11. A mixing and conveying pipe 7 is provided at the top of the expansion furnace 11, penetrating the heat exchange cylinder 4. Therefore, the flue gas after combustion is discharged through the mixing and conveying pipe 7, while the mixing and conveying pipe 7 releases a large amount of heat energy within the heat exchange cylinder 4. During installation, the heat exchange cylinder 4 is positioned close to the top of the expansion furnace 11, minimizing heat loss within the mixing and conveying pipe 7 and providing sufficient heat energy for the perlite's heat exchange. In this embodiment, a heat exchange channel 6 is provided within the heat exchange cylinder 4. The storage tank 1 has an inlet and an outlet, and the heat exchange channel 6 is not connected to the inner cavity 63 of the heat exchange cylinder 4. The outlet of the storage tank 1 is connected to the inlet of the heat exchange channel 6. The outlet of the heat exchange channel 6 is connected to the inlet of the transfer silo 8 through a pipe. The outlet of the transfer silo 8 adds material to the feed hopper 10 through a pipe. In this embodiment, the perlite in the storage tank 1 is powder. After the perlite enters the heat exchange channel 6 from the storage tank 1, it is heated. Then the heated perlite enters the transfer silo 8 and finally enters the expansion furnace 11 through the feed hopper 10 for calcination. After the perlite is preheated, it can be quickly calcined under the action of heat energy after entering the expansion furnace 11, thereby reducing energy consumption and making reasonable use of waste heat. This reduces the heat energy at the output end of the mixing and conveying pipe 7, which facilitates the subsequent storage of perlite.

[0026] In this embodiment, as Figures 2-5 As shown, the heat exchange cylinder 4 has an upper channel 61 and a lower channel 62 inside its wall. The upper channel 61 has a feed inlet at its inlet end, and the lower channel 62 has a discharge outlet at its outlet. The end of the upper channel 61 furthest from the feed inlet and the end of the lower channel 62 furthest from the discharge outlet are connected by an annular channel 64. Furthermore, a first screw conveyor 2 is installed between the storage tank 1 and the feed inlet of the heat exchange channel 6. An air pump 3 is installed on the first screw conveyor 2. The feeding rate of the perlite can be largely controlled by the first screw conveyor 2. The gas pump 3 enables the perlite powder to quickly enter the upper channel 61, then through the annular channel 64 into the lower channel 62, and finally into the transfer chamber 8. In this embodiment, the annular channel 64 is as close as possible to the end face of the heat exchange cylinder 4, while the feed end of the upper channel 61 and the discharge end of the lower channel 62 are as close as possible to the other end face of the heat exchange cylinder 4, thereby ensuring the effective length of the upper channel 61 and the lower channel 62, thus extending the heat exchange length of the perlite powder, ensuring the reliability of perlite heating, and improving the utilization rate of flue gas waste heat.

[0027] In another embodiment, such as Figure 1As shown, a second screw conveyor 9 is installed between the transfer bin 8 and the feed inlet. Similarly, the supply of perlite powder can be largely controlled through the second screw conveyor 9, thereby ensuring the reliability of perlite expansion.

[0028] In another embodiment, such as Figure 1 As shown, a first solenoid valve 12 is installed at the bottom of the storage tank 1, and a second solenoid valve 5 is installed at the bottom of the transfer chamber 8. The supply of perlite can be controlled by the solenoid valve. The control of the solenoid valve is existing technology and will not be described in detail.

[0029] The working process of this utility model is as follows: the first solenoid valve 12 is opened, and the perlite powder enters the first screw conveyor. Then the first conveying screw conveyor works, which conveys the perlite powder to the upper channel 61. Under the action of the air pump 3, the perlite powder enters the annular channel 64 from the upper channel 61, and then enters the transfer chamber 8 through the lower channel 62. Finally, it enters the feed hopper 10. After moving in the heat exchange channel 6, the perlite powder is heated. The perlite powder entering the expansion furnace 11 has a certain temperature, thereby reducing energy consumption and improving the utilization rate of flue gas waste heat.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An expanded perlite preheating device, characterized in that: The device includes an extrusion furnace, a heat exchange cylinder, a storage tank, and a transfer hopper. The bottom of the extrusion furnace is equipped with a feed hopper, and the top of the extrusion furnace is equipped with a mixing and conveying pipe that passes through the heat exchange cylinder. The heat exchange cylinder contains a heat exchange channel with an inlet and an outlet, but the heat exchange channel is not connected to the inner cavity of the heat exchange cylinder. The outlet of the storage tank is connected to the inlet of the heat exchange channel, and the outlet of the heat exchange channel is connected to the inlet of the transfer hopper via a pipe. The outlet of the transfer hopper adds material to the feed hopper via a pipe.

2. The expanded perlite preheating device according to claim 1, characterized in that: The heat exchange cylinder has an upper channel and a lower channel inside its wall. The upper channel has a feed inlet at its feed end and the lower channel has a discharge outlet at its discharge outlet. The end of the upper channel away from the feed inlet and the end of the lower channel away from the discharge outlet are connected by an annular channel.

3. The expanded perlite preheating device according to claim 2, characterized in that: A first screw conveyor is provided between the storage tank and the feed inlet of the heat exchange channel, and an air pump is provided on the first screw conveyor.

4. The expanded perlite preheating device according to claim 2, characterized in that: A second screw conveyor is installed between the transfer warehouse and the feed inlet.

5. The expanded perlite preheating device according to claim 3, characterized in that: A first solenoid valve is installed at the bottom of the storage tank.

6. The expanded perlite preheating device according to claim 4, characterized in that: A second solenoid valve is installed at the bottom of the transit warehouse.

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