Catalyst calcination unit

Abstract

This application provides a catalyst calcination apparatus, comprising: a solid material system including a preheating chamber, a calcination chamber, and a cooling chamber arranged sequentially from top to bottom, each chamber equipped with a gas collecting ring pipe and a gas distributing ring pipe, and the three chambers being sealed in sections by isolation valves; a circulating gas system located outside the calcination chamber, used to transport reducing gases and water vapor to the calcination chamber through the gas distributing ring pipe; and a water vapor circulating waste heat system located outside the cooling chamber, used to recover waste heat generated by the materials in the cooling chamber and generate superheated steam which is sent to the preheating chamber through the gas distributing ring pipe. This application employs a sectioned sealing structure, utilizing gravity to achieve continuous production during the calcination process. The introduction of the circulating gas system and the water vapor circulating waste heat system fully utilizes the chemical composition and calorific value of the exhaust gas generated during calcination, reducing carbon dioxide and harmful gas emissions. This apparatus significantly improves thermal efficiency, is energy-saving and environmentally friendly, and is applicable to the field of catalyst production equipment technology.

Description

Technical Field

[0001] This application relates to the field of catalyst production equipment technology, specifically to catalyst calcination equipment. Background Technology

[0002] Most catalysts need to be calcined before use. This is to ensure that the catalyst has a stable solid phase and crystal structure, and to remove some impurities from the catalyst surface, including organic precursors introduced during preparation, water and CO2 adsorbed from the air, etc. Therefore, calcination treatment is required.

[0003] CN213434350U describes a catalyst calcination device, which provides a lifting cylinder to drive the calcination chamber. It combines this with a vacuum pump to assist natural gas combustion, solving the problems of inconvenient material handling, feeding, and cleaning in existing calcination devices, as well as the long calcination time and lack of auxiliary acceleration functions. However, the combustion of natural gas in this device produces a large amount of carbon dioxide, and the exhaust port of the existing device lacks any purification mechanism, resulting in the generation of harmful gases during catalyst calcination. Direct emission of these gases would cause environmental pollution.

[0004] CN220103781U provides a metal catalyst reduction calcination device, which has a gas purification component installed on the outside of the calcination box, including an induced draft fan, a filter cylinder, a purification cylinder, a filter screen cylinder, an activated carbon plate, and a filter cotton layer. This device can adsorb harmful impurities in the gas, but the device is complex, the adsorption capacity of the activated carbon and filter cotton is limited, which can easily cause fluctuations in the internal pressure of the purification. At the same time, the replacement cost of the consumables is high, and the actual operating efficiency of the device is low. Utility Model Content

[0005] To address one of the aforementioned technical deficiencies, this application provides a catalyst calcination apparatus, comprising:

[0006] Solid material system: including a preheating chamber, a calcination chamber and a cooling chamber arranged sequentially from top to bottom. The top of the preheating chamber, the calcination chamber and the cooling chamber are respectively equipped with a first gas collecting ring pipe, a second gas collecting ring pipe and a third gas collecting ring pipe. The bottom of the preheating chamber, the calcination chamber and the cooling chamber are respectively equipped with a first gas distributing ring pipe, a second gas distributing ring pipe and a third gas distributing ring pipe. The gas collecting ring pipe and the gas distributing ring pipe are respectively connected to the indoor space they are connected to. The preheating chamber and the calcination chamber, the calcination chamber and the cooling chamber and the bottom outlet of the cooling chamber are respectively equipped with a discharge pipe with an isolation valve.

[0007] Circulating gas system: Located outside the calcination chamber, the circulating gas system is connected to the second gas collecting ring pipe 201 and the second gas distributing ring pipe 202 respectively. The circulating gas system is used to transport reducing gas and water vapor to the calcination chamber through the second gas distributing ring pipe.

[0008] Water vapor circulation waste heat system: Located outside the cooling chamber, the water vapor circulation waste heat system is used to recover the waste heat generated by the materials in the cooling chamber and generate superheated steam which is sent to the preheating chamber through the first gas distribution ring pipe.

[0009] Furthermore, the steam circulation waste heat system includes:

[0010] The waste heat steam furnace is installed outside the cooling chamber and is equipped with a water inlet and a water outlet.

[0011] The steam-water separator is connected to the inlet of the waste heat steam boiler, the outlet of the steam-water separator is connected to the return outlet of the waste heat steam boiler, and the outlet of the steam-water separator is connected to the third gas distribution ring pipe.

[0012] The third gas collection ring pipe is connected to the first gas distribution ring pipe, and it supplies superheated steam to the preheating chamber.

[0013] Furthermore, the recirculating gas system includes:

[0014] The circulating gas passage has its output end connected to the second gas distribution ring pipe and its input end connected to the second gas collection ring pipe. The circulating gas passage is equipped with a live steam replenishment port, and the third gas collection ring pipe is connected to the live steam replenishment port.

[0015] A circulating fan is installed on the circulating air passage and is used to pressurize the gas in the circulating air passage.

[0016] Furthermore, the catalyst calcination unit also includes a pressure stabilizing system, which includes:

[0017] The reaction vessel is located outside the preheating chamber. The first gas collecting ring pipe is connected to the reaction vessel through the gas outlet pipe, and the outlet of the gas outlet pipe is located below the liquid level inside the reaction vessel.

[0018] Furthermore, multiple electric heating rods are vertically installed in the calcination chamber, and these electric heating rods are evenly distributed within the calcination chamber.

[0019] Furthermore, both the gas distribution ring pipe and the gas collection ring pipe include:

[0020] Circular pipe;

[0021] Multiple connecting pipes are evenly distributed on the ring pipe. One end of each connecting pipe is connected to the ring pipe, and the other end of each connecting pipe is connected to the indoor space it is connected to.

[0022] Furthermore, the preheating chamber, calcination chamber, and cooling chamber are all equipped with explosion-proof vents, which are sealed with low-pressure explosion-proof discs.

[0023] Furthermore, the first gas distribution ring pipe of the preheating chamber is connected to an electrically heated steam generator.

[0024] Furthermore, a handhole is installed on the preheating chamber.

[0025] Furthermore, a manhole is installed at the bottom of the calcination chamber.

[0026] The catalyst calcination apparatus provided in this application embodiment utilizes a vertical, segmented, sealed structure design to achieve continuous production during the calcination process using gravity. A steam circulation waste heat system fully utilizes the latent heat and waste heat of the materials during the reaction, significantly improving heat utilization efficiency, saving energy, and reducing production costs. A circulating fan is introduced to fully utilize the chemical composition and calorific value of the exhaust gas generated during calcination, reducing carbon dioxide and harmful gas emissions. By controlling the isolation valve and adjusting the diameter and flow rate of the feed pipe, the residence time of the material in the three-chamber furnace is controlled, ensuring consistent relative residence time of the material in the furnace during continuous operation. It features high material and heat utilization efficiency, safety and reliability, simple operation, and uniform furnace temperature.

[0027] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of what is pointed out in the written description, claims, and drawings. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the characteristic catalyst calcination apparatus provided in the embodiments of this application;

[0030] Figure 2 This is a cross-sectional view of the calcination chamber at the gas collecting ring pipe;

[0031] Among them, 10 is the preheating chamber, 101 is the first gas collecting ring pipe, 102 is the first gas distributing ring pipe, 103 is the manhole, 20 is the calcination chamber, 201 is the second gas collecting ring pipe, 202 is the second gas distributing ring pipe, 203 is the heating rod, 204 is the manhole, 205 is the annular pipe, 206 is the connecting pipe, 30 is the cooling chamber, 301 is the third gas collecting ring pipe, 302 is the third gas distributing ring pipe, 40 is the isolation valve, 50 is the waste heat steam furnace, 501 is the water inlet, 502 is the water return outlet, 60 is the steam-water separator, 70 is the circulating gas channel, 80 is the circulating fan, 90 is the reaction tank, and 901 is the gas outlet pipe. Detailed Implementation

[0032] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0033] In the process of realizing this application, the inventors discovered that when existing catalyst calcination devices are used, natural gas combustion produces a large amount of carbon dioxide. At the same time, no purification mechanism is set at the exhaust port of the existing device. Some harmful gases are produced during catalyst calcination. Direct emission of these gases will cause environmental pollution. Furthermore, the adsorption capacity of gas purification components such as activated carbon and filter cotton is limited, which can easily cause fluctuations in the internal pressure of the purification system. The cost of replacing consumables is high, and the actual operating efficiency of the device is low.

[0034] To address the above problems, this application provides a catalyst calcination apparatus, comprising:

[0035] Solid material system: including a preheating chamber 10, a calcination chamber 20 and a cooling chamber 30 arranged sequentially from top to bottom. A feeding trough is opened at the top of the preheating chamber 10. A first gas collecting ring pipe 101, a second gas collecting ring pipe 201 and a third gas collecting ring pipe 301 are respectively installed at the top of the preheating chamber 10, the calcination chamber 20 and the cooling chamber 30. A first gas distributing ring pipe 102, a second gas distributing ring pipe 202 and a third gas distributing ring pipe 302 are respectively installed at the bottom of the preheating chamber 10, the calcination chamber 20 and the cooling chamber 30. The gas collecting ring pipe and the gas distributing ring pipe are respectively connected to their respective indoor spaces. A feeding pipe with an isolation valve 40 is respectively provided between the preheating chamber 10 and the calcination chamber 20, between the calcination chamber 20 and the cooling chamber 30 and at the bottom outlet of the cooling chamber 30. The outer shell of this catalyst calcination device is made of welded metal profiles and plates.

[0036] Circulating gas system: Located outside the calcination chamber 20, the circulating gas system is connected to the second gas collecting ring pipe 201 and the second gas distributing ring pipe 202 respectively. The circulating gas system is used to transport reducing gas and water vapor to the calcination chamber 20 through the second gas distributing ring pipe 202.

[0037] Water vapor circulation waste heat system: Located outside the cooling chamber 30, the water vapor circulation waste heat system is used to recover the waste heat generated by the material in the cooling chamber 30 and generate superheated steam which is sent to the preheating chamber 10 through the first gas distribution ring pipe 102.

[0038] In practice, the catalyst raw materials (hereinafter referred to as materials) are screened, and qualified particles are selected as raw materials. Particles that are too coarse are returned to crushing and screening, while particles that are too fine are reserved as raw materials for the preparation of catalysts for different purposes. Qualified particles are lifted by a bucket elevator to the top of the calcination device and added into the preheating chamber 10. With the help of gravity, the materials are slowly added into the feeding trough and slowly descend along the product channel by gravity, passing through the preheating chamber 10, calcination chamber 20, and cooling chamber 30 in sequence.

[0039] During initial startup, the first gas distribution ring pipe 102 of the preheating chamber 10 is connected to an electric heating steam generator. The low-pressure superheated steam generated by the electric heating steam generator dries and preheats the material in the preheating chamber 10. As the material gradually descends, it is heated and dried by the low-pressure superheated steam to remove moisture from the material (the low-pressure superheated steam has a high thermal conductivity coefficient, which can effectively transfer heat; the oxygen concentration is low, which helps to reduce oxidation reaction; and the superheated steam has a high heat capacity, which can carry more heat).

[0040] The preheated material enters the calcination chamber 20 for calcination at high temperature. The carbon in the material reacts with the water vapor supplied by the circulating gas system, and the resulting reducing gas is returned to the calcination chamber 20 through the circulating gas system. The metal components in the material directly contact the reducing gas to undergo a reduction reaction. After the set reaction time, the material enters the cooling chamber 30 for cooling. The water vapor circulation waste heat system recovers the waste heat generated by the material cooling and generates superheated steam, which is then transported to the preheating chamber 10 to provide the superheated steam required for the continuous operation of subsequent equipment (the first preheating requires additional superheated steam supplied by an electric heating steam generator).

[0041] Isolation valve 40 isolates the preheating chamber 10, calcination chamber 20, and cooling chamber 30, ensuring that each chamber is sealed to prevent gas leakage during catalyst production under normal operating conditions, thus preventing harm to operators and the environment. By controlling isolation valve 40, the diameter and flow rate of the feed pipe in the furnace of that chamber are adjusted to control the residence time of the material in the three furnace chambers, ensuring that the relative residence time of solid particles in the furnace is consistent during continuous operation.

[0042] As a preferred embodiment, the steam circulation waste heat system includes:

[0043] Waste heat steam furnace 50 is installed outside the cooling chamber 30. Waste heat steam furnace 50 is equipped with water inlet 501 and water outlet 502.

[0044] The outlet of the steam-water separator 60 is connected to the inlet of the steam-water separator 60, the outlet of the steam-water separator 60 is connected to the return water inlet 502 of the waste heat steam furnace 50, and the outlet of the steam-water separator 60 is connected to the third gas distribution ring pipe 302.

[0045] The third gas collection ring pipe 301 is connected to the first gas distribution ring pipe 102 to supply superheated steam to the preheating chamber 10.

[0046] In practice, the steam-water separator 60 provides a circulating heat exchange medium for the waste heat steam furnace 50, while simultaneously achieving steam-water separation. The pure water in the waste heat steam furnace 50 absorbs the heat from the cooling of the material in the cooling chamber 30, generating a steam-water mixture. After separation by the steam-water separator 60, the steam enters the preheating chamber 10 through the third gas distribution ring pipe 302, directly contacting the material and further absorbing / recovering the material's waste heat to generate low-pressure superheated steam. This steam is then transported to the preheating chamber through the third gas collection ring pipe 301. After further separation by the steam-water separator 60, the pure water re-enters the waste heat steam furnace 50 through the return water port 502, and the water replenishment port 501 replenishes the waste heat steam furnace 50 with the lost pure water. After secondary heat recovery, the temperature of the activated material can be reduced to below 60℃, facilitating material transportation and direct screening and packaging. The steam circulation waste heat system makes full use of the latent heat and waste heat of the materials during the reaction process to provide superheated steam for the preheating chamber 10. It eliminates the need for external equipment to generate gas, greatly improves heat utilization, saves energy, and reduces production costs.

[0047] As a preferred embodiment, the recirculating gas system includes:

[0048] The circulating gas passage 70 has its output end connected to the second gas distribution ring pipe 202 and its input end connected to the second gas collection ring pipe 201. The circulating gas passage 70 is provided with a live steam replenishment port, and the third gas collection ring pipe 301 is connected to the live steam replenishment port.

[0049] A circulating fan 80 is installed on the circulating air passage 70 and is used to pressurize the gas in the circulating air passage 70.

[0050] As a preferred option, such as Figure 1 , Figure 2 As shown, multiple electric heating rods 203 are vertically arranged inside the calcination chamber 20, and the multiple electric heating rods 203 are evenly distributed inside the calcination chamber 20.

[0051] As a preferred option, a manhole 204 is installed at the bottom of the calcination chamber 20 to facilitate maintenance personnel to inspect and maintain the electric heating rod 203.

[0052] In specific implementation, during the initial startup, the calcination chamber 20 is heated by the electric heating rod 203. During subsequent continuous operation, the calcination chamber can be heated simultaneously by the low-pressure superheated steam and circulating gas generated by the steam circulation waste heat system in the above-mentioned preferred scheme, as well as the electric heating rod 203. This fully utilizes the latent heat and waste heat of the materials during the reaction process. The heat required by the calcination chamber can be basically provided by the heat of the steam and circulating gas, and a small amount of heat can be supplemented by external electric heating, which further improves the heat utilization rate, saves energy, and reduces production costs. The steam transported by the circulating gas system comes from the low-pressure superheated steam generated by the steam circulation waste heat system. The steam and circulating gas enter the calcination chamber 20 from the bottom second gas distribution ring pipe 202, and flow in parallel with the preheated material from bottom to top. During the flow, the steam continuously contacts the material particles and undergoes a gasification reaction to obtain circulating gases such as carbon monoxide, hydrogen, nitric oxide, nitrogen dioxide, and carbon dioxide (the main composition of the gas can be adjusted by controlling the temperature of the calcination chamber 20 and the material composition). The circulating gas enters the circulating gas channel 70 through the second gas collection ring pipe 201, and is pressurized by the circulating fan 80 and transported back to the calcination chamber 20 from the second gas distribution ring pipe 202. The metal components in the material directly contact the reducing gas to carry out a reduction reaction. After the reaction is completed, the material to be cooled enters the cooling chamber 30 from the bottom of the calcination chamber 20 and is separated in the separation pipe. A small amount of gas carried out by the material from the circulating gas system, together with the live steam, is led out to the preheating chamber through the third gas collection ring pipe 301 of the cooling chamber 30.

[0053] As a preferred embodiment, the catalyst calcination unit also includes a pressure stabilizing system, which includes:

[0054] The reaction vessel 90 is located outside the preheating chamber 10. The first gas collecting ring pipe 101 is connected to the reaction vessel 90 through the gas outlet pipe 901. The outlet of the gas outlet pipe 901 is located below the liquid level inside the reaction vessel 90. The reaction vessel 90 is equipped with a venting safety valve.

[0055] Specifically, the purpose of setting a water seal inside the reaction vessel 90 is to maintain a slight positive pressure in the preheating chamber while preventing liquid water from being drawn back into the preheating chamber. The distance between the outlet position of the gas outlet pipe 901 and the liquid level is no more than 200 mm, and the distance between the liquid level and the outlet position of the first gas collecting ring pipe 101 is no less than 1000 mm.

[0056] As a preferred option, such as Figure 2 As shown, both the gas distribution ring pipe and the gas collection ring pipe include:

[0057] Circular pipe 205;

[0058] Multiple connecting pipes 206 are evenly arranged on the annular pipe 205. One end of the connecting pipe 206 is connected to the annular pipe 205, and the other end of the connecting pipe 206 is connected to the indoor space to which it is connected. The gas distribution ring pipe and the gas collection ring pipe adopt this structure, which can release or collect gas more centrally, evenly and efficiently, so that the solid raw materials and gaseous materials can fully and evenly contact and react. The reaction time and temperature of the whole process are easy to control and adjust, which further improves the production efficiency of the device, while reducing carbon dioxide and harmful gas emissions.

[0059] As a preferred embodiment, the preheating chamber 10, the calcining chamber 20, and the cooling chamber 30 are all equipped with explosion-proof vents, which are sealed with low-pressure explosion-proof discs.

[0060] As a preferred embodiment, a handhole 103 is installed on the preheating chamber 10. If a blockage occurs when the preheating chamber 10 is being discharged, it can be handled through the handhole 103.

[0061] This invention provides a novel catalyst calcination device that employs a vertical, segmented, sealed structure, utilizing gravity to achieve continuous production during the calcination process. A steam circulation waste heat system fully utilizes the latent heat and waste heat of the materials during the reaction, providing the necessary heat to the calcination chamber and low-pressure superheated steam to the preheating chamber, significantly improving heat utilization, saving energy, and reducing production costs. Through the coordination of the gas distribution ring pipe and the gas collection ring pipe, solid raw materials and gaseous materials are ensured to fully and uniformly contact and react. Simultaneously, a circulating fan is introduced to fully utilize the chemical composition and calorific value of the exhaust gas generated during calcination, reducing carbon dioxide and harmful gas emissions. By controlling the isolation valve and adjusting the diameter and flow rate of the feed pipe, the residence time of the material in the three-chamber furnace is controlled, ensuring consistent relative residence time of the material in the furnace during continuous operation. This device significantly improves thermal efficiency, reduces exhaust gas emissions, provides controllable material temperature, has a large output per unit volume, high calcination efficiency, high steam utilization efficiency, is energy-saving and environmentally friendly, and produces stable and uniform powdered and granular catalysts, making it highly practical.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing 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, and therefore should not be construed as a limitation of this application.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0065] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0066] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A catalyst calcination apparatus, characterized in that, include: Solid material system: including a preheating chamber (10), a calcination chamber (20) and a cooling chamber (30) arranged from top to bottom. The top of the preheating chamber (10), the calcination chamber (20) and the cooling chamber (30) are respectively equipped with a first gas collecting ring pipe (101), a second gas collecting ring pipe (201) and a third gas collecting ring pipe (301). The bottom of the preheating chamber (10), the calcination chamber (20) and the cooling chamber (30) are respectively equipped with a first gas distributing ring pipe (102), a second gas distributing ring pipe (202) and a third gas distributing ring pipe (302). The gas collecting ring pipe and the gas distributing ring pipe are respectively connected to the indoor space connected to them. The preheating chamber (10) and the calcination chamber (20), the calcination chamber (20) and the cooling chamber (30) and the bottom outlet of the cooling chamber (30) are respectively equipped with a discharge pipe with an isolation valve (40). Circulating gas system: Located outside the calcination chamber (20), the circulating gas system is connected to the second gas collecting ring pipe (201) and the second gas distributing ring pipe (202) respectively. The circulating gas system is used to transport reducing gas and water vapor to the calcination chamber (20) through the second gas distributing ring pipe (202). Water vapor circulation waste heat system: Located outside the cooling chamber (30), the water vapor circulation waste heat system is used to recover the waste heat generated by the material in the cooling chamber (30) and generate superheated steam to be sent to the preheating chamber (10) through the first gas distribution ring pipe (102).

2. The catalyst calcination apparatus according to claim 1, characterized in that, The steam circulation waste heat system includes: Waste heat steam furnace (50) is installed outside the cooling chamber (30), and the waste heat steam furnace (50) is provided with a water inlet (501) and a water return inlet (502). The outlet of the steam-water separator (60) is connected to the inlet of the steam-water separator (60), the outlet of the steam-water separator (60) is connected to the return water inlet (502) of the waste heat steam furnace (50), and the outlet of the steam-water separator (60) is connected to the third gas distribution ring pipe (302). The third gas collecting ring pipe (301) is connected to the first gas distributing ring pipe (102) to supply superheated steam to the preheating chamber (10).

3. The catalyst calcination apparatus according to claim 2, characterized in that, The recirculating gas system includes: The circulating gas passage (70) has its output end connected to the second gas distribution ring pipe (202), and its input end connected to the second gas collection ring pipe (201). The circulating gas passage (70) is provided with a live steam replenishment port, and the third gas collection ring pipe (301) is connected to the live steam replenishment port. A circulating fan (80) is installed on the circulating air passage (70) and is used to pressurize the gas in the circulating air passage (70).

4. The catalyst calcination apparatus according to claim 1, characterized in that, It also includes a voltage regulator system, which comprises: The reaction vessel (90) is located outside the preheating chamber (10). The first gas collecting ring pipe (101) is connected to the reaction vessel (90) through the gas outlet pipe (901). The outlet of the gas outlet pipe (901) is located below the liquid level inside the reaction vessel (90).

5. The catalyst calcination apparatus according to claim 1, characterized in that, Multiple electric heating rods (203) are vertically arranged inside the calcination chamber (20), and the multiple electric heating rods (203) are evenly distributed inside the calcination chamber (20).

6. The catalyst calcination apparatus according to claim 1, characterized in that, Both the gas distribution ring pipe and the gas collecting ring pipe include: Circular pipe (205); Multiple connecting pipes (206) are evenly distributed on the annular pipe (205). One end of the connecting pipe (206) is connected to the annular pipe (205), and the other end of the connecting pipe (206) is connected to the indoor space to which it is connected.

7. The catalyst calcination apparatus according to claim 1, characterized in that, The preheating chamber (10), calcination chamber (20), and cooling chamber (30) are all equipped with explosion-proof ports, which are sealed with low-pressure explosion-proof sheets.

8. The catalyst calcination apparatus according to claim 1, characterized in that, The first gas distribution ring pipe (102) of the preheating chamber (10) is connected to an electric heating steam generator.

9. The catalyst calcination apparatus according to claim 1, characterized in that, A handhole (103) is installed on the preheating chamber (10).

10. The catalyst calcination apparatus according to claim 5, characterized in that, A manhole (204) is installed at the bottom of the calcination chamber (20).

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