An expanded perlite production line

Abstract

The utility model discloses an expanded perlite production line, including the puffing furnace, the bottom of puffing furnace is provided with the feed hopper, the top of puffing furnace is provided with the flue gas cover, the flue gas cover has horizontal conveying section, and is provided with the coarse material blanking hopper at the bottom of the horizontal conveying section of flue gas cover, the bottom of coarse material blanking hopper is communicated with finished product collecting jar through pipeline, and the end of the horizontal conveying section of flue gas cover is provided with the mixed conveying pipe, and the discharge end of mixed conveying pipe is communicated with fine material collecting jar, and the discharge port of fine material collecting jar is communicated with finished product collecting jar through pipeline, still including perlite preheating device. The utility model has the advantages of realizing the separated collection of coarse material and fine material, and being provided with heat exchange channel in the heat exchange cylinder, and the perlite powder is preheated before entering the puffing furnace by heat exchange with flue gas waste heat, thereby reducing the energy consumption, and improving the utilization rate of flue gas waste heat.

Description

Technical Field

[0001] This utility model relates to perlite expansion, and in particular to an expanded perlite production line. 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 enters the expansion furnace for expansion. The expanded perlite powder is then piled up and used to produce desulfurized gypsum.

[0003] The flue gas from the expansion furnace has a high temperature. If it is simply left to dissipate heat naturally in the air, it will result in 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 expansion furnace. However, the perlite powder at room temperature takes a long time to heat up after entering the expansion furnace, which leads to low expansion efficiency and high heat consumption. Moreover, perlite is divided into coarse and fine sand, and its weight is different after expansion. Under the action of flue gas, the collection positions of coarse and fine materials are also different.

[0004] After long-term research, the inventors have taken into account the utilization of waste heat, the preheating of perlite, and the collection of perlite, and proposed an expanded perlite production line. Utility Model Content

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

[0006] The objective of this utility model is achieved through the following technical solution: an expanded perlite production line includes an expansion furnace, a feeding hopper at the bottom of the expansion furnace, and a flue gas hood at the top of the expansion furnace. The flue gas hood has a horizontal conveying section, and a coarse material discharge hopper is located at the bottom of the horizontal conveying section of the flue gas hood. The bottom of the coarse material discharge hopper is connected to a finished product collection tank via a pipe. A mixing conveying pipe is located at the end of the horizontal conveying section of the flue gas hood, and the outlet of the mixing conveying pipe is connected to a fine material collection tank. The outlet of the fine material collection tank is connected to the finished product collection tank via a pipe. The system includes a storage tank, a heat exchange cylinder, and a transfer hopper. The heat exchange cylinder has a heat exchange channel with an inlet and an outlet, but the channel is not connected to the inner cavity of the heat exchange cylinder. A mixing and conveying pipe is installed in conjunction with the inner cavity, with its end extending out of the inner cavity. 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.

[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 second air pump is installed on the mixing and delivery pipe between the flue gas hood and the heat exchange cylinder.

[0009] Optionally, a first solenoid valve is installed at the bottom of the storage tank, and a first screw conveyor is installed between the storage tank and the feed inlet of the heat exchange channel, with a first air pump installed on the first screw conveyor.

[0010] Optionally, a second solenoid valve is installed at the bottom of the transfer chamber, and a second screw conveyor is installed between the transfer chamber and the feed inlet.

[0011] Optionally, a bucket elevator for feeding the storage tank can be installed on one side of the puffing furnace.

[0012] The expanded perlite production line also includes a finished product silo. The outlet of the finished product collection tank is connected to the finished product silo via a pipeline, and a weighing instrument is installed on the pipeline. An air compressor is connected to the pipeline below the weighing instrument.

[0013] The present invention has the following advantages: The expanded perlite production line of the present invention realizes the separate collection of coarse and fine materials, and a heat exchange channel is set in the heat exchange cylinder. The perlite powder exchanges heat with the waste heat of 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

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the heat exchange cylinder;

[0016] Figure 3 for Figure 2 Schematic diagram of the cross section of AA;

[0017] Figure 4 for Figure 2 Cross-sectional view of BB;

[0018] Figure 5 for Figure 2 Cross-sectional view of CC;

[0019] In the diagram, 1-storage tank, 2-first screw conveyor, 3-first 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, 13-coarse material discharge hopper, 14-finished product collection tank, 15-fine material collection tank, 16-bucket elevator, 17-finished product silo, 18-air compressor, 19-weighing instrument, 20-fume hood, 21-second air pump, 61-upper channel, 62-lower channel, 63-inner cavity, 64-annular channel. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] like Figure 1 As shown, an expanded perlite production line includes an expansion furnace 11, a feed hopper 10 at the bottom of the expansion furnace 11, and a flue gas hood 20 at the top of the expansion furnace 11. The flue gas hood 20 has a horizontal conveying section, and a coarse material discharge hopper 13 is provided at the bottom of the horizontal conveying section of the flue gas hood 20. The bottom of the coarse material discharge hopper 13 is connected to the finished product collection tank 14 through a pipe. A mixing conveying pipe 7 is provided at the end of the horizontal conveying section of the flue gas hood 20. The discharge end of the mixing conveying pipe 7 is connected to the fine material collection tank 15. The discharge port of the fine material collection tank 15 is connected to the finished product collection tank 14 through a pipe. After the perlite expands, the flue gas carrying the coarse and fine materials enters the flue gas hood 20 from the top of the expansion furnace 11. The flue gas hood 20 has a flue gas flow passage. Then, the flue gas carrying the coarse and fine materials enters the horizontal conveying section. During delivery, the power gradually decreases as the travel distance increases. Therefore, when the coarse material is above the coarse material hopper 13, it will fall into the coarse material hopper 13 under the action of gravity, and then enter the finished product collection tank 14. In another embodiment, in order to ensure that the coarse material can smoothly enter the finished product collection tank 14, an air pump can be installed on the pipeline between the coarse material hopper 13 and the finished product collection tank 14 to provide power for the expanded coarse perlite. In this embodiment, some of the expanded fine perlite will also fall into the coarse material hopper 13, while another part of the fine perlite will enter the mixing conveying pipe 7 with the flue gas, and finally enter the fine material collection tank 15. Then the fine perlite in the fine material collection tank 15 will be transported to the finished product collection tank 14 through the pipeline, thereby completing the collection of the expanded coarse and fine perlite.

[0027] In this embodiment, although the temperature of the flue gas decreases as it is conveyed, the mixing and conveying pipe 7 still retains a significant amount of waste heat. Therefore, to improve the utilization rate of this waste heat and increase the efficiency of perlite expansion, the expanded perlite production line also includes a perlite preheating device, such as... Figure 1As shown, the perlite preheating device includes a storage tank 1, a heat exchange cylinder 4, and a transfer chamber 8. A heat exchange channel 6 is provided inside the heat exchange cylinder 4, with an inlet and an outlet. The heat exchange channel 6 is not connected to the inner cavity 63 of the heat exchange cylinder 4. A mixing and conveying pipe 7 is installed in conjunction with the inner cavity 63, and the end of the mixing and conveying pipe 7 extends out of the inner cavity 63 of the heat exchange cylinder 4. Therefore, the heat energy of the mixing and conveying pipe 7 can be transferred to the heat exchange channel 6, thereby heating the perlite within the heat exchange channel 6. The outlet of the storage tank 1 is connected to the inlet of the heat exchange channel 6, and the outlet of the heat exchange channel 6 is connected to the inlet of the transfer chamber 8 via a pipe. Material is added to the feed hopper 10 through the outlet of the transfer silo 8 via a pipe. In this embodiment, the perlite in the storage tank 1 is powder, which is divided into coarse powder and fine 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 rapidly expanded 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.

[0028] 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. A first 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 first air 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.

[0029] In this embodiment, the flue gas entering the mixing gas delivery pipe may experience a decrease in velocity. However, since perlite fines are being transported, they can enter the fines collection tank 15 through the mixing gas delivery pipe. However, to improve the transport efficiency of the perlite fines, such as... Figure 1As shown, a second air pump 21 is installed on the mixing and conveying pipe 7 between the flue gas hood 20 and the heat exchange cylinder 4. The second air pump 21 provides kinetic energy, thereby increasing the conveying efficiency of perlite fines. However, after the second air pump 21 supplies air to the mixing and conveying pipe, the temperature inside the mixing and conveying pipe will drop, but the drop is not significant. Therefore, there is no need to worry that the heat energy released by the mixing and conveying pipe will not be able to preheat the perlite.

[0030] In another embodiment, such as Figure 1 As shown, a second screw conveyor 9 is installed between the transfer silo 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.

[0031] 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.

[0032] In this embodiment, as Figure 1 As shown, a bucket elevator 16 is provided on one side of the expansion furnace 11 to supply material to the storage tank 1. The bucket elevator 16 can lift the screened perlite to a high place and then transport it into the storage tank 1, thereby replenishing the perlite in the storage tank 1 and realizing the continuous production of the expanded perlite production line.

[0033] In this embodiment, the expanded perlite production line also includes a finished product silo 17. The outlet of the finished product collection tank 14 is connected to the finished product silo 17 via a pipeline, and a weighing instrument 19 is installed on the pipeline. An air compressor 18 is connected to the pipeline below the weighing instrument 19. The finished product from the finished product collection tank 14 is transported to the finished product silo 17 through the pipeline and weighed by the weighing instrument 19, so that the weight of the expanded perlite in the finished product silo 17 can be known, which facilitates the management of the finished perlite. The air compressor 18 mainly provides power to improve the conveying efficiency of the finished perlite during the conveying process. Of course, in this embodiment, the weighing instrument 19 and the air compressor 18 are commercially available products, and their installation methods and working principles are existing technologies, so they will not be described in detail.

[0034] 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 operates, thereby conveying the perlite powder into the upper channel 61. Under the action of the air pump, the perlite powder enters the annular channel 64 from the upper channel 61, then enters the transfer chamber 8 through the lower channel 62, and finally enters the feed hopper 10. After moving in the heat exchange channel 6, the perlite powder is heated and then enters the perlite powder in the expansion furnace 11. Since the material has a certain temperature, the perlite powder can reach the expansion temperature more quickly in the expansion furnace, thereby completing the expansion of the perlite. After the perlite expands, it enters the flue gas hood 20 along with the flue gas. Then, the coarse material and some of the fine material fall into the coarse material hopper 13 and finally enter the finished product collection tank 14. The other part of the fine material enters the fine material collection tank 15 through the mixing conveying pipe 7. Then, the fine material enters the finished product collection tank 14 from the fine material collection tank 15. Finally, the expanded perlite enters the finished product silo 17.

[0035] 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 production line, characterized in that: The device includes an extrusion furnace, a feeding hopper at the bottom of the extrusion furnace, a flue gas hood at the top of the extrusion furnace, a horizontal conveying section of the flue gas hood, a coarse material discharge hopper at the bottom of the horizontal conveying section of the flue gas hood, the bottom of the coarse material discharge hopper being connected to a finished product collection tank via a pipe, a mixing conveying pipe at the end of the horizontal conveying section of the flue gas hood, the discharge end of the mixing conveying pipe being connected to a fine material collection tank, and the discharge port of the fine material collection tank being connected to the finished product collection tank via a pipe. It also includes a perlite preheating device, which comprises a storage tank, a heat exchange cylinder, and a transfer hopper. The heat exchange cylinder is provided with a heat exchange channel, which has an inlet and an outlet. The heat exchange channel is not connected to the inner cavity of the heat exchange cylinder. A mixing conveying pipe is installed in conjunction with the inner cavity, and the end of the mixing conveying pipe extends out of the inner cavity of the heat exchange cylinder. The outlet of the storage tank is connected to the inlet of the heat exchange channel. 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 feed hopper through a pipe.

2. The expanded perlite production line 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 production line according to claim 2, characterized in that: A second air pump is installed on the mixing and conveying pipe between the flue gas hood and the heat exchange cylinder.

4. An expanded perlite production line according to any one of claims 1 to 3, characterized in that: A first solenoid valve is provided at the bottom of the storage tank, and a first screw conveyor is provided between the storage tank and the feed inlet of the heat exchange channel. A first air pump is provided on the first screw conveyor.

5. An expanded perlite production line according to claim 4, characterized in that: A second solenoid valve is installed at the bottom of the transfer chamber, and a second screw conveyor is installed between the transfer chamber and the feed inlet.

6. An expanded perlite production line according to claim 5, characterized in that: A bucket elevator is installed on one side of the puffing furnace to supply material to the storage tank.

7. An expanded perlite production line according to claim 6, characterized in that: It also includes a finished product silo, the outlet of the finished product collection tank is connected to the finished product silo via a pipeline, and a weighing instrument is installed on the pipeline, and an air compressor is connected to the pipeline located below the weighing instrument.

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