Lithium ore rotary kiln tail gas treatment equipment

Abstract

The utility model belongs to tail gas treatment technical field especially relates to a lithium ore rotary kiln tail gas treatment equipment, including rotary kiln, the one side of rotary kiln is provided with combustion chamber, and the gas outlet end of rotary kiln is communicated with the gas inlet end of combustion chamber, and the inner chamber of combustion chamber is provided with nozzle, and the upper end of nozzle is communicated with gas pipeline, first heat exchange subassembly, first heat exchange subassembly includes setting in the combustion chamber one side plate heat exchanger, and the flue gas outlet of combustion chamber is connected with the flue gas inlet of plate heat exchanger, and one side of plate heat exchanger is communicated with second pipeline, the utility model combustion chamber burns VOCs in flue gas through nozzle, can solve VOCs treatment difficulty thoroughly, can also make full use of the heat that VOCs burns and releases, realizes the full use of waste gas, in first heat exchange subassembly, plate heat exchanger passes on flue gas heat to cold wind, and the hot air after heating is sent back to rotary kiln as combustion-supporting air through second pipeline, completes heat recycling, and further reduces energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of tail gas treatment technology, and in particular relates to a tail gas treatment device for lithium ore rotary kilns. Background Technology

[0002] During lithium ore processing, rotary kilns produce high-temperature exhaust gases with complex compositions, including volatile organic compounds (VOCs), sulfur dioxide (SO2), and nitrogen oxides (NOx). x Pollutants such as dust and hydrogen fluoride, if directly emitted, will severely damage the ecological environment, and the large amount of heat energy carried by the exhaust gas is not effectively utilized, posing multiple problems:

[0003] First, VOCs treatment is ineffective. Traditional methods often employ adsorption or low-temperature catalytic oxidation, but adsorbents are easily saturated, require frequent replacement, and have limited processing capacity. Low-temperature catalytic oxidation is also ineffective at completely decomposing stubborn VOCs. Furthermore, neither method utilizes the heat released from VOCs combustion, resulting in energy waste. Second, heat utilization is low. The initial temperature of rotary kiln tail gas can reach 800-1000℃. Traditional equipment only cools the gas before emission, without recovering this portion of heat energy, leading to high energy consumption in rotary kiln production. Improvement is urgently needed. Therefore, we propose a lithium ore rotary kiln tail gas treatment device. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a lithium ore rotary kiln tail gas treatment device that effectively treats VOCs in the tail gas and recovers and utilizes heat.

[0005] In view of this, the present invention provides a lithium ore rotary kiln tail gas treatment device, including a rotary kiln, a combustion chamber provided on one side of the rotary kiln, the exhaust end of the rotary kiln being connected to the inlet end of the combustion chamber, a nozzle provided in the inner cavity of the combustion chamber, the upper end of the nozzle being connected to a gas pipeline, a first heat exchange component, the first heat exchange component including a plate heat exchanger provided on one side of the combustion chamber, the flue gas outlet of the combustion chamber being connected to the flue gas inlet of the plate heat exchanger, a second pipeline connected to one side of the plate heat exchanger, the other end of the second pipeline being connected to the combustion air inlet of the rotary kiln, and an integrated dust removal and denitrification tank provided on one side of the plate heat exchanger. The integrated dust removal and denitrification tank has multiple flexible metal membrane filter bags inside its cavity, a quick-release assembly, and a mounting base on the flexible metal membrane filter bag, as well as an annular groove on the flexible metal membrane filter bag. The mounting base has multiple mounting slots inside, multiple positioning rings at the upper end of the mounting base, and a wedge plate at the lower end of the positioning rings. The mounting slots have an annular groove at the upper end, and a pressure rod inside the annular groove. A second heat exchange assembly includes a hot water boiler located on one side of the integrated dust removal and denitrification tank, with a third pipe and a fourth pipe connected to both sides of the hot water boiler.

[0006] Furthermore, an ammonia tank is provided at the lower end of the plate heat exchanger. The ammonia tank is connected to the high-temperature flue of the integrated dust removal and denitrification tank via a transfer pump, which is used to transport the ammonia in the ammonia tank to the high-temperature flue for gasification into ammonia gas.

[0007] Furthermore, the flue gas outlet of the hot water boiler is connected to the flue gas inlet of the desulfurization tower.

[0008] Furthermore, the plate heat exchanger is connected to a first pipe on the other side, and the first pipe is located on the other side of the second pipe.

[0009] Furthermore, the positioning ring corresponds one-to-one with the mounting groove, and the size of the positioning ring is larger than the size of the mounting groove.

[0010] Furthermore, four wedge plates are provided, and the wedge plates are arranged in a ring, with the wedge plates being movably connected to the annular groove.

[0011] Furthermore, the pressing rod is movably connected to the annular groove, and the pressing rod corresponds one-to-one with the wedge plate.

[0012] Furthermore, a spring is fixedly installed at one end of the pressure rod, and the springs are arranged symmetrically.

[0013] Furthermore, a fixing ring is provided at the upper edge of the inner cavity of the metal flexible membrane filter bag, and the fixing ring is detachably connected to the metal flexible membrane filter bag.

[0014] The beneficial effects of this utility model are:

[0015] The combustion chamber burns VOCs in the flue gas through nozzles, which can not only completely solve the difficulties of VOCs treatment, but also make full use of the heat released by VOCs combustion, thus achieving full utilization of the waste gas. In the first heat exchange component, the plate heat exchanger transfers the heat of the flue gas to the cold air. The heated hot air is then sent back to the rotary kiln as combustion air through the second pipe, completing the heat recycling and further reducing energy consumption. At the same time, the flue gas temperature drops to 350℃, providing suitable temperature conditions for subsequent integrated dust removal and denitrification treatment.

[0016] The quick-release assembly uses the rotation of the positioning ring to drive the wedge plate to push the pressure rod into the annular groove of the filter bag, which can quickly complete the installation and fixation of the metal flexible membrane filter bag. Subsequent disassembly and maintenance are convenient, greatly reducing equipment downtime and improving operation and maintenance efficiency.

[0017] The hot water boiler of the second heat exchange component is fed with cold water through the third pipe. After absorbing the heat of the flue gas, it discharges 90°C hot water from the fourth pipe for use in the plant area, thus recovering the waste heat of the flue gas again and reducing the temperature of the flue gas, which facilitates the subsequent desulfurization treatment of the flue gas. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a lithium ore rotary kiln tail gas treatment device proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the integrated dust removal and denitrification tank of a lithium ore rotary kiln tail gas treatment equipment proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the quick-release component structure of a lithium ore rotary kiln tail gas treatment equipment proposed in this utility model.

[0021] Figure 4 This utility model proposes a lithium ore rotary kiln tail gas treatment device. Figure 3 A magnified view of part A;

[0022] Figure 5 This is a schematic diagram of the positioning ring and wedge plate structure of a lithium ore rotary kiln tail gas treatment device proposed in this utility model;

[0023] The markings in the diagram are as follows:

[0024] 1. Rotary kiln; 2. Nozzle; 3. Combustion chamber; 4. Plate heat exchanger; 5. First pipe; 6. Second pipe; 7. Ammonia tank; 8. Integrated dust removal and denitrification tank; 81. Mounting base; 82. Flexible metal membrane filter bag; 83. Positioning ring; 84. Annular groove; 85. Wedge plate; 86. Pressure bar; 87. Annular groove; 88. Fixing ring; 89. Spring; 810. Mounting groove; 9. Transfer pump; 10. Hot water boiler; 11. Third pipe; 12. Fourth pipe; 13. Desulfurization tower. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0026] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] It should be noted that 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 are not limited in number; 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.

[0028] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0029] It should be noted that, in this application, 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. Without further limitations, 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. Furthermore, it should be noted that the scope of the methods and apparatuses 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. Additionally, features described with reference to certain examples may be combined in other examples.

[0030] Reference Figures 1 to 5A lithium ore rotary kiln tail gas treatment device includes a rotary kiln 1, a combustion chamber 3 on one side of the rotary kiln 1, the outlet of the rotary kiln 1 being connected to the inlet of the combustion chamber 3, a nozzle 2 inside the combustion chamber 3, the upper end of the nozzle 2 being connected to a gas pipeline, a first heat exchange component, including a plate heat exchanger 4 on one side of the combustion chamber 3, the flue gas outlet of the combustion chamber 3 being connected to the flue gas inlet of the plate heat exchanger 4, a second pipeline 6 connected to one side of the plate heat exchanger 4, the other end of the second pipeline 6 being connected to the combustion air inlet of the rotary kiln 1, and an integrated dust removal and denitrification tank 8 on one side of the plate heat exchanger 4, the inner cavity of the integrated dust removal and denitrification tank 8 being provided with multiple A flexible metal membrane filter bag 82, a quick-release assembly, the quick-release assembly includes a mounting base 81 disposed on the flexible metal membrane filter bag 82, and an annular groove 87 disposed on the flexible metal membrane filter bag 82. The mounting base 81 has multiple mounting slots 810 inside, multiple positioning rings 83 are disposed at the upper end of the mounting base 81, and a wedge plate 85 is disposed at the lower end of the positioning rings 83. An annular groove 84 is disposed at the upper end of the mounting slots 810, and a pressure rod 86 is disposed in the inner cavity of the annular groove 84. A second heat exchange assembly, the second heat exchange assembly includes a hot water boiler 10 disposed on one side of the integrated dust removal and denitrification tank 8, and a third pipe 11 and a fourth pipe 12 are respectively connected to the two sides of the hot water boiler 10.

[0031] This invention addresses the issue of VOCs, SO2, and NO produced by rotary kiln 1. x Flue gas containing hydrogen fluoride and dust is discharged from the outlet of rotary kiln 1 into combustion chamber 3. Fuel is supplied to combustion chamber 3 via nozzle 2 and ignited, raising the temperature of combustion chamber 3 to 900℃. At this high temperature, VOCs in the flue gas are completely incinerated and decomposed, eliminating VOC pollution and releasing heat. The high-temperature flue gas from combustion chamber 3 then enters the flue gas passage of plate heat exchanger 4. At room temperature, cold air enters the cold air passage of plate heat exchanger 4 via the first pipe 5, exchanging heat with the high-temperature flue gas, reducing the flue gas temperature to 350℃. The cold air absorbs heat and becomes hot air. The hot air is then transported to the combustion air inlet of rotary kiln 1 via the second pipe 6, participating in the reaction within rotary kiln 1 as combustion air, achieving heat recycling. The 350℃ flue gas after heat exchange enters the integrated dust removal and denitrification tank 8. The flexible metal membrane filter bag 82 inside the tank filters the flue gas, trapping dust and reducing the dust concentration in the flue gas to 10mg / Nm³. 3 Within; simultaneously, externally supplied ammonia (generated by the vaporization of ammonia water) reacts with NO in the flue gas. xThe reaction occurs under the action of a catalyst inside the tank, producing colorless and odorless nitrogen and water, thus completing the denitrification treatment. When installing the flexible metal membrane filter bag 82, align the filter bag with the mounting groove 810 of the mounting base 81, ensuring that the annular groove 87 of the filter bag corresponds to the position of the pressure rod 86. Rotate the positioning ring 83, causing the lower wedge plate 85 to slide within the annular groove 84. The wedge plate 85, through its inclined thrust, pushes the pressure rod 86 towards the filter bag until the pressure rod 86 engages with the annular groove 87 of the filter bag, achieving filtration. The filter bag is designed for quick installation; during disassembly, the positioning ring 83 is rotated in the opposite direction, and the wedge plate 85 disengages from the pressure rod 86, thus releasing the fixation and facilitating filter bag replacement. The flue gas after dust removal and denitrification enters the hot water boiler 10; cold water enters the water-side channel of the hot water boiler 10 through the third pipe 11, where it exchanges heat with the flue gas, further reducing the flue gas temperature. The cold water absorbs heat and rises to 90°C; the 90°C hot water is transported to the plant area through the fourth pipe 12 for production or domestic use, achieving secondary recovery of waste heat from the flue gas.

[0032] In the example of this application, an ammonia tank 7 is provided at the lower end of the plate heat exchanger 4. The ammonia tank 7 is connected to the high-temperature flue of the integrated dust removal and denitrification tank 8 via a transfer pump 9.

[0033] As a preferred example of this utility model, the ammonia tank 7 stores ammonia water for denitrification. When the integrated dust removal and denitrification tank 8 needs to undergo a denitrification reaction, the transfer pump 9 is started. The transfer pump 9 accurately delivers the ammonia water in the ammonia tank 7 to the high-temperature flue of the integrated dust removal and denitrification tank 8 (the flue gas temperature in the flue is about 350°C) through pipelines. After entering the high-temperature flue, the ammonia water rapidly vaporizes in the high-temperature environment to generate ammonia gas. The ammonia gas enters the interior of the integrated dust removal and denitrification tank 8 along with the flue gas, where it reacts with NO in the flue gas. x The denitrification reaction occurs under the action of a catalyst, thus eliminating the need for additional gasification equipment.

[0034] In the example of this application, the flue gas outlet of the hot water boiler 10 is connected to the flue gas inlet of the desulfurization tower 13.

[0035] As a preferred example of this utility model, after the hot water boiler 10 completes heat exchange, the flue gas temperature drops to 150℃, which is within the suitable range for the desulfurization reaction. The flue gas enters the flue gas inlet of the desulfurization tower 13 from the flue gas outlet of the hot water boiler 10. The desulfurization tower 13 is filled or sprayed with desulfurizing agent. The flue gas comes into full contact with the desulfurizing agent in the desulfurization tower 13, and acidic gases such as SO2 and hydrogen fluoride in the flue gas react chemically with the desulfurizing agent and are absorbed and removed. After desulfurization treatment, various pollutants (SO2, NO ... x All emissions (including particulate matter, dust, and VOCs) meet emission standards, ultimately achieving compliant emissions and forming a complete flue gas treatment process.

[0036] In the example of this application, the other side of the plate heat exchanger 4 is connected to the first pipe 5, and the first pipe 5 is located on the other side of the second pipe 6.

[0037] As a preferred example of this utility model, a first pipe 5 and a second pipe 6 are respectively provided on both sides of the plate heat exchanger 4. The ambient temperature cold air continuously enters the cold air side of the plate heat exchanger 4 through the first pipe 5 and exchanges heat efficiently with the high temperature flue gas flowing into the flue gas side of the plate heat exchanger 4 from the combustion chamber 3. During the heat exchange process, the heat of the flue gas is absorbed by the cold air, and the flue gas temperature is stably reduced to 350°C, while the cold air is heated up and becomes hot air. The heated hot air is directly transported to the combustion air inlet of the rotary kiln 1 through the second pipe 6 and participates in the production process of the rotary kiln 1 as combustion air, thereby reducing heat source consumption and improving the overall heat exchange efficiency.

[0038] In the example of this application, the positioning ring 83 corresponds one-to-one with the mounting groove 810, and the size of the positioning ring 83 is larger than the size of the mounting groove 810.

[0039] As a preferred example of this utility model, when installing the metal flexible membrane filter bag 82, ensure that the wedge plate 85 at the lower end of the positioning ring 83 can accurately act on the pressing rod 86 in the corresponding mounting groove 810, so that the pressing rod 86 can be accurately inserted into the annular groove 87 of the filter bag, preventing the filter bag from not sealing properly due to component misalignment, avoiding leakage of flue gas from the gap between the filter bag and the mounting base 81, and ensuring the dust removal effect.

[0040] In the example of this application, four wedge plates 85 are provided, and the wedge plates 85 are arranged in a ring, and the wedge plates 85 are movably connected to the annular groove 84.

[0041] As a preferred example of this utility model, four wedge-shaped plates 85 are evenly arranged in a ring at the lower end of the positioning ring 83 of the quick-release assembly, and the wedge-shaped plates 85 are movably connected to the annular groove 84 of the mounting base 81. When the positioning ring 83 is rotated, the four wedge-shaped plates 85 rotate synchronously in the annular groove 84 in a circumferential direction, applying a uniform pushing force from all sides of the filter bag to the pressing rod 86 in the mounting groove 810, pushing the pressing rod 86 to move synchronously towards the annular groove 87 of the filter bag and engage, thereby ensuring that the filter bag is subjected to balanced force around its perimeter, avoiding the filter bag from being misaligned or deformed due to excessive force on one side, ensuring a tight fit between the filter bag and the mounting base 81, and improving dust removal sealing performance. At the same time, the movable connection between the wedge-shaped plates 85 and the annular groove 84 reduces the frictional resistance between the wedge-shaped plates 85 and the inner wall of the annular groove 84 when the wedge-shaped plates 85 rotate, making the rotation of the positioning ring 83 easier and avoiding the problem of component jamming caused by friction and wear, thus extending the service life of the quick-release assembly.

[0042] In the example of this application, the pressure bar 86 is movably connected to the annular groove 84, and the pressure bar 86 corresponds one-to-one with the wedge plate 85.

[0043] As a preferred example of this utility model, when the wedge plate 85 rotates under the drive of the positioning ring 83, the thrust of the wedge plate 85 can be transmitted to the corresponding pressing rod 86, ensuring that all pressing rods 86 move synchronously and evenly towards the annular groove 87 of the filter bag. This avoids situations where some pressing rods 86 are not locked or some pressing rods 86 are too tight, ensuring the reliability of the filter bag installation and preventing the filter bag from shifting or falling off under the impact of high-temperature flue gas or vibration during equipment operation. In addition, the pressing rod 86 and the annular groove 84 are connected by a movable through connection, so that the pressing rod 86 can only slide along the axial direction of the annular groove 84, limiting the offset direction of the pressing rod 86. This ensures that the pressing rod 86 can stably align with and engage with the annular groove 87 of the filter bag under the thrust of the wedge plate 85, further improving the stability and ease of operation of the filter bag installation.

[0044] In the example of this application, a spring 89 is fixedly installed at one end of the pressure rod 86, and the springs 89 are arranged symmetrically.

[0045] As a preferred example of this utility model, one end of the pressure rod 86 is fixedly equipped with symmetrically arranged springs 89. When the springs 89 are in their natural state, the pressure rod 86 does not extend into the annular groove 87 of the filter bag. When installing the filter bag, rotating the positioning ring 83 causes the wedge plate 85 to push the pressure rod 86 towards the filter bag, compressing the springs 89, which store elastic potential energy. When it is necessary to disassemble the filter bag, rotating the positioning ring 83 in the opposite direction causes the wedge plate 85 to disengage from the pressure rod 86, releasing the elastic potential energy of the springs 89 and generating a restoring force, which drives the pressure rod 86 to automatically exit the annular groove 87 of the filter bag. This eliminates the need for manual disassembly of the pressure rod 86, thereby achieving rapid disassembly and assembly of the filter bag and significantly shortening maintenance time.

[0046] In the example of this application, a fixing ring 88 is provided at the upper edge of the inner cavity of the metal flexible membrane filter bag 82, and the fixing ring 88 is detachably connected to the metal flexible membrane filter bag 82.

[0047] As a preferred example of this utility model, a fixing ring 88 is installed at the upper edge of the inner cavity of the metal flexible membrane filter bag 82. The fixing ring 88 is made of rigid material, which enhances the structural strength of the top of the filter bag and provides support for the annular groove 87 of the metal flexible membrane filter bag 82, ensuring that the pressure bar 86 can effectively press against and limit the installation of the metal flexible membrane filter bag 82.

[0048] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A lithium ore rotary kiln tail gas treatment device, characterized in that, include: A rotary kiln (1) is provided with a combustion chamber (3) on one side. The gas outlet of the rotary kiln (1) is connected to the gas inlet of the combustion chamber (3). A nozzle (2) is provided in the inner cavity of the combustion chamber (3). The upper end of the nozzle (2) is connected to the gas pipeline. The first heat exchange component includes a plate heat exchanger (4) disposed on one side of the combustion chamber (3), the flue gas outlet of the combustion chamber (3) is connected to the flue gas inlet of the plate heat exchanger (4), and a second pipe (6) is connected to one side of the plate heat exchanger (4), and the other end of the second pipe (6) is connected to the combustion air inlet of the rotary kiln (1). The plate heat exchanger (4) is provided with a dust removal and denitrification integrated tank (8) on one side, and the inner cavity of the dust removal and denitrification integrated tank (8) is provided with multiple metal flexible membrane filter bags (82). The quick-release assembly includes a mounting base (81) disposed on the metal flexible membrane filter bag (82) and an annular groove (87) disposed on the metal flexible membrane filter bag (82). The mounting base (81) has multiple mounting slots (810) inside. The upper end of the mounting base (81) is provided with multiple positioning rings (83). The lower end of the positioning rings (83) is provided with a wedge plate (85). The upper end of the mounting slots (810) is provided with an annular groove (84). The inner cavity of the annular groove (84) is provided with a pressure rod (86). The second heat exchange component includes a hot water boiler (10) disposed on one side of the integrated dust removal and denitrification tank (8), and the hot water boiler (10) is connected to a third pipe (11) and a fourth pipe (12) on both sides respectively.

2. The lithium ore rotary kiln tail gas treatment equipment according to claim 1, characterized in that, The lower end of the plate heat exchanger (4) is provided with an ammonia water tank (7). The ammonia water tank (7) is connected to the high-temperature flue of the dust removal and denitrification integrated tank (8) through a transfer pump (9) to transport the ammonia water in the ammonia water tank (7) to the high-temperature flue to gasify and form ammonia gas.

3. The lithium ore rotary kiln tail gas treatment equipment according to claim 2, characterized in that, The flue gas outlet of the hot water boiler (10) is connected to the flue gas inlet of the desulfurization tower (13).

4. The lithium ore rotary kiln tail gas treatment equipment according to claim 3, characterized in that, The plate heat exchanger (4) is connected to a first pipe (5) on the other side, and the first pipe (5) is located on the other side of the second pipe (6).

5. The lithium ore rotary kiln tail gas treatment equipment according to claim 4, characterized in that, The positioning ring (83) corresponds one-to-one with the mounting groove (810), and the size of the positioning ring (83) is larger than the size of the mounting groove (810).

6. The lithium ore rotary kiln tail gas treatment equipment according to claim 5, characterized in that, The wedge plates (85) are configured as four, and the wedge plates (85) are arranged in a ring. The wedge plates (85) are movably connected to the annular groove (84).

7. The lithium ore rotary kiln tail gas treatment equipment according to claim 6, characterized in that, The pressure bar (86) is movably connected to the annular groove (84), and the pressure bar (86) corresponds one-to-one with the wedge plate (85).

8. The lithium ore rotary kiln tail gas treatment equipment according to claim 7, characterized in that, A spring (89) is fixedly installed at one end of the pressure rod (86), and the springs (89) are symmetrically arranged.

9. The lithium ore rotary kiln tail gas treatment equipment according to claim 8, characterized in that, A fixing ring (88) is provided at the upper edge of the inner cavity of the metal flexible membrane filter bag (82), and the fixing ring (88) is detachably connected to the metal flexible membrane filter bag (82).

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