A calcination decomposition collection device

Abstract

The application relates to the technical field of chemical equipment, and particularly provides a calcination and decomposition collecting device, which comprises a heater, a condensation collector and a tail gas treatment subsystem which are sequentially fluidly connected, the condensation collector comprises a shell, a jacket and a spiral condensation pipe, the jacket is attached to the outer surface of the shell, the shell defines a containing cavity and is provided with a condensation collection gas inlet, the spiral condensation pipe is contained in the containing cavity, and the spiral condensation pipe and the condensation collection gas inlet are separated from each other. The jacket is arranged on the outer surface of the condensation collector, and the spiral condensation pipe is arranged in the condensation collector, so that the mixed gas flowing from the heater to the condensation collector is condensed and treated in the condensation collector, and the NH4Cl after condensation and crystallization accumulates at the bottom of the condensation collector, thereby realizing batch recovery and utilization of the NH4Cl, reducing the risk that the NH4Cl enters a downstream pipeline and is enriched in the pipeline, thereby blocking the pipeline and causing the pressure in the calcination and decomposition collecting device to rise, and finally causing an explosion.

Description

Technical Field

[0001] This application relates to the field of chemical equipment technology, and in particular to a calcination decomposition and collection device. Background Technology

[0002] As highly reactive rare alkali metals, Rb and Cs play irreplaceable roles in cutting-edge technologies such as aerospace, defense, new energy, biomedicine, catalysts, quantum technology, and optoelectronic devices. Therefore, the preparation technology and innovation of high-purity Rb and Cs are receiving significant attention. Tubular furnaces are a commonly used and crucial high-temperature heating device, capable of creating a highly uniform and controllable axial heating zone within the furnace tube. Both ends of the furnace tube are typically equipped with sealing flanges and plugs, and it can be used for the high-temperature calcination of Rb or Cs compounds. However, in practical applications for the calcination and decomposition of Rb or Cs compounds, a large amount of ammonium chloride (NH4Cl) is generated. This ammonium chloride, carried by the gas flow, enters downstream pipelines and accumulates there, causing pollution and blockages, and even posing an explosion risk. Therefore, there is an urgent need to develop new equipment to discharge and collect these ammonium chloride products, ensuring product quality and overall process safety while improving product utilization and reducing exhaust gas pollution. Utility Model Content

[0003] This application provides a calcination decomposition collection device to solve the defects in the prior art where NH4Cl accumulates in the pipeline of the calcination decomposition collection device, thereby contaminating and clogging the pipeline and even potentially causing an explosion. It realizes the simultaneous extraction of high-purity alkali metals from the calcination decomposition of Rb or Cs compounds, while removing and utilizing NH4Cl from the calcination decomposition collection device, thus ensuring both product quality and the safety of the entire process.

[0004] This application provides a calcination decomposition and collection device, comprising a heater, a condenser collector, and a tail gas treatment subsystem connected in sequence by fluid flow. The condenser includes a housing, a jacket, and a spiral condenser tube. The jacket is fitted to the outer surface of the housing. The housing defines a receiving cavity and has a condenser collection inlet. The spiral condenser tube is housed in the receiving cavity and is separate from the condenser collection inlet.

[0005] According to the calcination decomposition collection device provided in this application, the condenser collector further includes a discharge port and a first regulating valve. The discharge port is disposed on the shell, and the first regulating valve is disposed on the discharge port and is used to regulate the flow rate of the discharge port.

[0006] According to the calcination decomposition and collection device provided in this application, the exhaust gas treatment subsystem includes several absorption tanks, which are connected in series in a fluid manner.

[0007] According to the calcination decomposition and collection device provided in this application, a vacuum pump is also included. In the direction of fluid flow, the vacuum pump is located after the last absorption tank and is fluidly connected to it.

[0008] According to the calcination decomposition collection device provided in this application, each absorption tank contains water, alkaline solution or acid solution.

[0009] According to the calcination decomposition and collection device provided in this application, the heater is a tubular furnace.

[0010] According to the calcination decomposition and collection device provided in this application, the heater further includes a multi-layer material rack, which is placed in the furnace tube of a tubular furnace.

[0011] According to the calcination decomposition and collection device provided in this application, the heater further includes a furnace plug, which is formed in a honeycomb structure and is placed at the far end of the furnace tube of the tubular furnace in the direction of fluid flow.

[0012] According to the calcination decomposition and collection device provided in this application, the heater also includes a pressure sensor, which is located after the heater in the fluid flow direction and is used to detect the internal pressure of the heater.

[0013] According to the calcination decomposition and collection device provided in this application, a gas dryer is also included, which is disposed before and fluidly connected to the heater in the direction of fluid flow.

[0014] The calcination decomposition and collection device provided in this application, by setting a jacket on the outer surface of the condenser and simultaneously installing a spiral condenser tube inside the condenser, allows the mixed gas flowing from the heater to the condenser to be condensed. A large amount of NH4Cl contained in the mixed gas is condensed into crystals, meaning that a significant amount of NH4Cl is separated from the mixed gas. The crystallized NH4Cl accumulates at the bottom of the condenser, thus enabling the batch recovery and utilization of NH4Cl through periodic cleaning of the condenser. The condensed exhaust gas no longer contains a large amount of NH4Cl, reducing the risk of NH4Cl entering and accumulating in downstream pipelines, thereby preventing pipeline blockage, increased internal pressure of the calcination decomposition and collection device, and ultimately, an explosion. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the calcination decomposition and collection device provided in this application.

[0017] Figure 2 yes Figure 1 The diagram shows a front view of the calcination decomposition and collection apparatus, with a portion of the heater shown in cross-section.

[0018] Figure 3 This is an axial cross-sectional view of the condenser collector provided in this application.

[0019] Figure 4 This is a perspective view of the multi-layer material rack provided in this application.

[0020] Figure 5 This is a perspective view of the furnace plug provided in this application.

[0021] Figure label: 1. First inlet pipe; 2. Gas dryer; 3. Second inlet pipe; 301. Second regulating valve; 4. Heater; 401. Control panel; 402. Multi-layer material rack; 403. Furnace plug; 5. First exhaust pipe; 501. Pressure sensor; 6. Condenser collector; 601. Condenser collector inlet; 602. Discharge port; 603. First regulating valve; 604. Housing; 605. Jacket; 606. Spiral condenser tube; 7. Second exhaust pipe; 701. Third regulating valve; 8. Tail gas treatment subsystem; 9. Initial absorption tank; 10. Third exhaust pipe; 11. Last absorption tank; 12. Fourth exhaust pipe; 121. Check valve; 122. Fourth regulating valve; 13. Air pump. Detailed Implementation

[0022] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0023] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., 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 the embodiments of this application 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 the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections, wherein a fixed connection can include an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0025] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] The following is combined with Figures 1 to 5 This application describes the calcination decomposition and collection device.

[0028] Figure 1 This is a perspective view of the calcination decomposition and collection device provided in this application. Figure 2 yes Figure 1 The front view of the calcination decomposition and collection device shown is as follows: Figures 1 to 2 As shown, the calcination decomposition and collection device includes a heater 4, a condenser 6, and an exhaust gas treatment subsystem 8, which are connected in sequence by fluid. Specifically, the heater 4 and the condenser 6 are fluidly connected by a first exhaust pipe 5, while the condenser 6 and the exhaust gas treatment subsystem 8 are fluidly connected by a second exhaust pipe 7.

[0029] Figure 3This is an axial cross-sectional view of the condenser collector provided in this application, such as... Figures 1 to 3 As shown, the condenser collector 6 includes a housing 604, a jacket 605, and a spiral condenser tube 606. The jacket 605 is fitted to the outer surface of the housing 604. The housing 604 also defines a receiving cavity and has a condensation collection inlet 601, specifically located in the lower half of the housing 604. The spiral condenser tube 606 is housed within the receiving cavity, and the spiral condenser tube 606 is separate from the condensation collection inlet 601; in other words, the spiral condenser tube 606 and the condensation collection inlet 601 are not directly fluidly connected, but rather indirectly fluidly connected through the receiving cavity. With the above configuration, the condensation and collection of NH4Cl in the condenser collector 6 is fully realized. In particular, by setting the first exhaust pipe 5 and the condensation collection inlet 601 in the lower half, NH4Cl can be concentrated and condensed at the bottom of the condenser collector 6. Furthermore, the exhaust gas after condensation is smoothly discharged to the subsequent exhaust gas treatment subsystem 8 through the spiral condenser pipe 606, so that the exhaust gas can be further treated by the exhaust gas treatment subsystem 8.

[0030] Preferably, the heater 4 further includes a pressure sensor 501. In the fluid flow direction, the pressure sensor 501 is positioned after the heater 4 and is used to detect the internal pressure of the heater 4. The pressure sensor 501 is, for example, a pressure gauge, which can be arranged on the first exhaust pipe 5 behind the heater 4. Based on the internal pressure of the heater 4 displayed by the pressure sensor 501, the operator can adjust the air intake flow rate of the heater 4 accordingly to avoid the risk of explosion due to excessive internal pressure. More preferably, the outer surface of the first exhaust pipe 5 can be covered with a heating insulation sleeve (not shown in the figure) to prevent easily condensable byproducts (e.g., NH4Cl) flowing through the first exhaust pipe 5 from condensing inside the first exhaust pipe 5, ensuring that the byproducts condense and are collected only after smoothly entering the condenser collector 6. That is, by providing a heating insulation sleeve, easily condensable byproducts can be prevented from condensing inside the first exhaust pipe 5 and thus blocking the associated pipes.

[0031] Similarly, the second exhaust pipe 7 may be equipped with a third regulating valve 701 to regulate the exhaust gas flow from the condenser collector 6 to the exhaust gas treatment subsystem 8. Furthermore, the third regulating valve 701 may be combined with the intake regulation of the heater 4 (which will be described further below) to create a near-vacuum atmosphere inside the heater 4.

[0032] Furthermore, the condenser collector 6 also includes a discharge port 602 and a first regulating valve 603. The discharge port 602 is disposed on the housing 604, and the first regulating valve 603 is disposed on the discharge port 602 and is used to regulate the flow rate of the discharge port 602. With the above configuration, NH4Cl condensed and accumulated in the condenser collector 6 can be discharged by opening the first regulating valve 603 for collection by the operator. Furthermore, the operator can adjust the discharge rate of NH4Cl by adjusting the opening degree of the first regulating valve 603.

[0033] Furthermore, as an emergency measure, a portion of the condensed exhaust gas can also be directly discharged to the outside through the discharge port 602. In other words, not all exhaust gas must be transported to the exhaust gas treatment subsystem 8 through the second exhaust pipe 7 to be absorbed. The advantage of this configuration is that, on the one hand, it can reduce the amount of exhaust gas to be treated by the exhaust gas treatment subsystem 8, thereby reducing the burden on the exhaust gas treatment subsystem 8; on the other hand, it can work with the third regulating valve 701 and the subsequent vacuum pump 13 (which will be further described below) to maintain the negative pressure atmosphere in the condenser collector 6.

[0034] Furthermore, the exhaust gas treatment subsystem 8 includes several absorption tanks, which are fluidly connected in series. Specifically, the initial absorption tank 9 and the final absorption tank 11 are fluidly connected via a third exhaust pipe 10. Although Figures 1 to 2 Only two absorption tanks are shown, namely the initial absorption tank 9 and the final absorption tank 11. However, this does not mean that the exhaust gas treatment subsystem 8 of this application is limited to two absorption tanks. More absorption tanks connected in series and fluidly linked can be arranged between the initial absorption tank 9 and the final absorption tank 11. Preferably, each absorption tank contains water, alkaline solution, acid solution, or other similar absorbent liquid to absorb the exhaust gas introduced into the corresponding absorption tank. Depending on the composition of the exhaust gas to be absorbed, the absorption tanks can contain the same or different absorbent liquids relative to each other. For example, several absorption tanks each contain different absorbent liquids, which is beneficial for absorbing different components in the exhaust gas; or, a portion of several absorption tanks contain the same absorbent liquid, which is beneficial for more thorough absorption of a certain component in the exhaust gas, such as a component with a large weight percentage. With the above configuration, the final emitted exhaust gas is sufficiently clean and pollution-free, meeting environmental protection requirements.

[0035] For each absorption tank, its inlet pipe is inserted into the bottom of the absorption tank but does not contact the bottom, and its outlet pipe is inserted into the absorption tank but located at the top of the absorption tank. In this way, the exhaust gas entering from the inlet pipe must pass through the absorbent liquid for absorption treatment. The remaining exhaust gas after absorption treatment exits the absorbent liquid and flows to the next component from the outlet pipe. For the initial absorption tank 9, its inlet pipe is the second exhaust pipe 7, and its outlet pipe is the third exhaust pipe 10; for the last absorption tank 11, its inlet pipe is the third exhaust pipe 10, and its outlet pipe is the fourth exhaust pipe 12, and so on.

[0036] Furthermore, the calcination decomposition and collection device also includes a vacuum pump 13. In the fluid flow direction, the vacuum pump 13 is positioned after and fluidly connected to the last absorption tank 11. Specifically, the last absorption tank 11 and the vacuum pump 13 are fluidly connected via a fourth exhaust pipe 12. With this configuration, and in conjunction with the aforementioned third regulating valve 701, a negative pressure atmosphere can be maintained in the condenser collector 6. Preferably, in the fluid flow direction, the fourth exhaust pipe 12 is thus equipped with a one-way valve 121 and a fourth regulating valve 122. The vacuum pump 13 can achieve a negative pressure atmosphere throughout the entire calcination decomposition and collection device and provide power for the fluid flow throughout the entire device, ensuring that the calcination decomposition and collection device will not be damaged or even explode due to local blockage. The one-way valve 121 ensures that the absorbed exhaust gas can only flow from the last absorption tank 11 to the vacuum pump 13, preventing reverse flow and thus preventing backflow from the last absorption tank 11 or even the initial absorption tank 9. The fourth regulating valve 122 can adjust the suction rate of the air pump 13, thereby adjusting the fluid flow rate of the entire calcination decomposition and collection device.

[0037] Reference Figure 2 A portion of heater 4 is shown in cross-sectional view. Heater 4 can be a tube furnace. Tube furnaces can be used in the metallurgical field and can create specific atmospheric conditions within the furnace tubes. Since the heating temperature can reach 450°C to 550°C when calcining and decomposing Rb or Cs compounds, the furnace tubes must be constructed of heat-resistant materials, such as quartz.

[0038] Figure 4 This is a perspective view of the multi-layer material rack provided in this application, such as... Figure 4As shown, the heater 4 (i.e., the tube furnace) also includes a multi-layer material rack 402, which is placed inside the furnace tubes of the tube furnace. In traditional tube furnaces, whether single-tube or multi-tube configurations, the material to be heated is typically placed directly inside the furnace tubes, resulting in a small amount of material that can be heated in a single calcination process. Therefore, at least one multi-layer material rack 402 is placed inside the furnace tubes, for example, in the middle section of the furnace tubes. Each layer of the multi-layer material rack 402 can hold a considerable amount of material to be heated. The advantage of this configuration is that it fully utilizes the internal longitudinal space of the heater 4, represented by the tube furnace, enabling batch calcination and decomposition processing of materials.

[0039] Figure 5 This is a perspective view of the furnace plug provided in this application, such as... Figure 5 As shown, the heater 4 (i.e., the tubular furnace) also includes a plug 403. In the fluid flow direction, the plug 403 is placed at least at the distal end of the furnace tube, preferably with plugs 403 at both the proximal and distal ends of the furnace tube. The plug 403 is formed in a honeycomb structure, meaning it has multiple parallel channels extending along the longitudinal direction of the furnace. The plug 403 not only provides insulation but also prevents airflow convection. The honeycomb structure of the plug 403 allows the sublimated NH4Cl produced during the heating process to pass smoothly through, thus preventing NH4Cl from accumulating and condensing at the plug 403, ultimately clogging the tubular furnace.

[0040] Similarly, in order to enable both the multi-layer material rack 402 and the furnace plug 403 to adapt to the high-temperature heating environment of the heater 4, both the multi-layer material rack 402 and the furnace plug 403 are made of heat-resistant materials, such as quartz.

[0041] Additionally, heater 4 (i.e., tube furnace) also includes control panel 401. Operators can use control panel 401 to set the heating process of the tube furnace.

[0042] Furthermore, the calcination decomposition and collection device also includes a gas dryer 2. In the fluid flow direction, the gas dryer 2 is positioned before and fluidly connected to the heater 4. Specifically, the gas dryer 2 is fluidly connected to a gas source via a first inlet pipe 1. The gas source can be ambient air, an N2 source, an Ar source, or an H2 source, thereby creating a specific atmosphere inside the heater 4. Subsequently, the gas dryer 2 and the heater 4 are fluidly connected via a second inlet pipe 3. With this configuration, the gas used to create the atmosphere inside the heater 4 has been dried before entering the heater 4, particularly the furnace tubes of a tubular furnace. Preferably, a filter screen can be provided at the connection point between the gas dryer 2 and the second inlet pipe 3 to prevent the desiccant in the gas dryer 2 from entering the second inlet pipe 3 or even the heater 4 under the influence of airflow.

[0043] As described above, the gas dryer 2 and the heater 4 are fluidly connected via the second inlet pipe 3. Preferably, the second inlet pipe 3 may be equipped with a second regulating valve 301, which can regulate the gas flow rate fed to the heater 4. Alternatively, the second regulating valve 301 can be completely closed, in conjunction with the aforementioned third regulating valve 701, to create a vacuum atmosphere inside the heater 4 and even the entire calcination decomposition and collection device.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A calcination decomposition and collection device, characterized in that, It includes a heater (4), a condenser collector (6), and an exhaust gas treatment subsystem (8) connected in sequence by fluid, wherein, The condenser (6) includes a housing (604), a jacket (605), and a spiral condenser tube (606), wherein the jacket (605) is fitted to the inner and outer surfaces of the housing (604), the housing (604) defines a receiving cavity and has a condenser collection inlet (601), the spiral condenser tube (606) is housed in the receiving cavity, and the spiral condenser tube (606) and the condenser collection inlet (601) are separate from each other.

2. The calcination decomposition and collection device according to claim 1, characterized in that, The condenser collector (6) further includes a discharge port (602) and a first regulating valve (603). The discharge port (602) is disposed on the housing (604), and the first regulating valve (603) is disposed on the discharge port (602) and is used to regulate the flow rate of the discharge port (602).

3. The calcination decomposition and collection device according to claim 1, characterized in that, The exhaust gas treatment subsystem (8) includes several absorption tanks, which are connected in series in a fluid manner.

4. The calcination decomposition and collection device according to claim 3, characterized in that, It also includes a vacuum pump (13), which is positioned after and fluidly connected to the last absorption tank (11) in the direction of fluid flow.

5. The calcination decomposition and collection device according to claim 3, characterized in that, Each of the absorption tanks contains water, alkali, or acid.

6. The calcination decomposition and collection device according to claim 1, characterized in that, The heater (4) is a tubular furnace.

7. The calcination decomposition and collection device according to claim 6, characterized in that, The heater (4) also includes a multi-layer material rack (402) placed in the furnace tube of the tubular furnace.

8. The calcination decomposition and collection device according to claim 7, characterized in that, The heater (4) also includes a furnace plug (403) which is formed in a honeycomb structure and is placed at the far end of the furnace tube of the tubular furnace in the direction of fluid flow.

9. The calcination decomposition and collection device according to claim 1 or 6, characterized in that, The heater (4) also includes a pressure sensor (501) which is disposed after the heater (4) in the direction of fluid flow and is used to detect the internal pressure of the heater (4).

10. The calcination decomposition and collection device according to claim 1, characterized in that, It also includes a gas dryer (2), which is positioned before and fluidly connected to the heater (4) in the direction of fluid flow.

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