Denitration catalyst calcining device for laboratory

Abstract

The utility model relates to the technical field of denitration catalyst preparation, in particular to a denitration catalyst calcining device for a laboratory, which comprises a rotary furnace, a feed port is arranged above the side wall of one end of the rotary furnace, a discharge port is arranged below the side wall of the other end of the rotary furnace, and one end of the rotary furnace close to the feed port is connected with an output shaft of a driving motor. The feeding port is connected with a stock bin through a conveying device, an air inlet is formed in the end, close to the discharging port, of the rotary furnace, and an air outlet is formed in the lower portion of the side wall of the end, close to the feeding port, of the rotary furnace. The denitration catalyst calcining device is suitable for laboratory operation, simple in design, easy and convenient to operate, convenient to adjust and suitable for calcining various denitration catalysts. Wherein solid feeding and gas feeding in the rotary furnace are in reverse flow, so that sufficient calcination of the materials is guaranteed. The feeding port is connected with the stock bin through the conveying device, the catalyst to be calcined in the stock bin can be stably conveyed to the rotary furnace, feeding is uniform, and continuity of the calcining process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of denitrification catalyst preparation technology, and in particular to a laboratory denitrification catalyst calcination device. Background Technology

[0002] Denitrification catalysts are widely used in denitrification projects at coal-fired power plants. Industrial denitrification catalysts are mainly vanadium-titanium based, with the main components being V₂O₅-WO₃(MoO₃) / TiO₂, and a temperature window of 320~420℃. In recent years, the ultra-low emission retrofitting of coal-fired power plants has been largely completed, and non-power industries such as steel, cement, and coking have become new application scenarios for denitrification catalysts. The flue gas temperature in non-power industries is generally lower, making traditional vanadium-titanium based catalysts unsuitable, necessitating the development of novel denitrification catalysts.

[0003] Novel denitration catalysts generally include manganese-based catalysts and copper-based catalysts. In laboratory preparation, impregnation, drying, and calcination processes are commonly used. For manganese-based and copper-based catalysts, the calcination process is particularly important, as the calcination parameters directly affect the structure and dispersion of the active components, thus influencing the catalyst's activity.

[0004] Currently, the calcination equipment commonly used in laboratories has certain limitations in meeting the preparation requirements of novel denitration catalysts. It may not be able to accurately control calcination parameters or has deficiencies in catalyst delivery and collection, making it difficult to meet the demand for high-quality preparation of novel denitration catalysts.

[0005] Therefore, it is necessary to develop a laboratory denitrification catalyst calcination device. Utility Model Content

[0006] The purpose of this invention is to provide a laboratory denitrification catalyst calcination device that can smoothly calcine the denitrification catalyst and whose calcination parameters are easy to adjust.

[0007] This utility model provides a laboratory denitrification catalyst calcination device, including a rotary kiln. The rotary kiln has a feed inlet on the upper side wall of one end and a discharge outlet on the lower side wall of the other end. The output shaft of a drive motor is connected to the end of the rotary kiln near the feed inlet. The feed inlet is connected to a hopper through a conveying device. An air inlet is provided at the end of the rotary kiln near the discharge outlet, and an air outlet is provided on the lower side wall of the end of the rotary kiln near the feed inlet.

[0008] Preferably, the feed inlet of the rotary kiln is higher than the discharge outlet.

[0009] Preferably, the angle between the axis of the rotary kiln and the horizontal line is 15-30°.

[0010] Preferably, the inner wall of the rotary kiln is provided with a plurality of lifting plates, which are symmetrically arranged in the inner wall of the rotary kiln.

[0011] Preferably, the air inlet is connected to an air source via a pipe, and the pipe is equipped with a valve.

[0012] Preferably, the conveying device is a solid material conveying valve.

[0013] Preferably, the output shaft of the drive motor is connected to the rotary kiln via a coupling.

[0014] Preferably, the air outlet is connected to the waste gas purification device via an air outlet pipe.

[0015] Preferably, the waste gas purification device uses a washing bottle with a sealed bottle opening. The outlet pipe is inserted below the liquid surface of the washing bottle, and the bottle opening is also provided with an exhaust pipe with the end of the exhaust pipe located above the liquid surface of the washing bottle.

[0016] Preferably, the discharge port is connected to the collector via a pipe.

[0017] Beneficial effects:

[0018] The denitrification catalyst calcination device provided by this utility model is suitable for laboratory operation. It features a simple design, easy operation, and convenient adjustment, and is applicable to the calcination of various types of denitrification catalysts. In the rotary kiln, the solid feed and gas inlet flow counter-currently, ensuring complete calcination of the material. The feed inlet is connected to a hopper via a conveying device, stably transporting the catalyst to be calcined from the hopper to the rotary kiln. The feeding is uniform and allows for continuous operation, ensuring the continuity of the calcination process. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Drive motor, 2-Coupling, 3-Rotary furnace, 301-Feed inlet, 302-Discharge outlet, 303-Air outlet, 304-Air inlet, 305-Lifting plate, 4-Hopper, 5-Solid material conveying valve, 6-Valve, 7-Waste gas purification device, 701-Air outlet pipe, 702-Exhaust pipe, 8-Collector. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, 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", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0025] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1

[0027] like Figure 1As shown, a laboratory denitrification catalyst calcination device includes a rotary kiln 3. A feed inlet 301 is located on the upper side wall of one end of the rotary kiln 3, and a discharge outlet 302 is located on the lower side wall of the other end. The discharge outlet 302 is connected to a collector 8 via a pipe, facilitating the collection of the calcined catalyst, reducing catalyst loss during collection, improving product recovery rate, and ensuring a smooth discharge process without hindering subsequent product processing. Preferably, the collector 8 is a cyclone collector, which has high collection efficiency, reduces catalyst loss, and improves product recovery rate. The output shaft of a drive motor 1 is connected to the end of the rotary kiln 3 near the feed inlet 301. The output shaft of the drive motor 1 is connected to the rotary kiln 3 via a coupling 2. The drive motor 1 controls the rotation speed of the rotary kiln 3 to 10-50 rpm. The rotation speed of the rotary kiln 3 can be controlled by adjusting the motor speed, thereby adjusting the residence time of the catalyst in the furnace to ensure complete calcination. The drive motor 1 can be a variable frequency speed control motor. The feed inlet 301 is connected to the silo 4 via a conveying device. The conveying device uses a solid material conveying valve 5, which can precisely control the amount of catalyst to be calcined, ensuring the stability of each feed. A screw conveying valve is preferred, as it can achieve uniform and accurate feeding, which is beneficial to improving the stability and consistency of catalyst calcination.

[0028] One end of the feed inlet 301 of the rotary kiln 3 is higher than the other end of the discharge outlet 302. The angle between the axis of the rotary kiln 3 and the horizontal line is 15-30°, which facilitates the movement of the catalyst inside the rotary kiln 3 towards the discharge outlet 302 under the action of gravity. Several lifting plates 305 are provided on the inner wall of the rotary kiln 3, symmetrically arranged. Preferably, 2-4 lifting plates 305 are provided. When the rotary kiln 3 rotates, the lifting plates 305 can lift and turn the catalyst. When the rotary kiln 3 is tilted, the catalyst is subjected to the combined action of gravity and centrifugal force, resulting in more uniform heating and natural movement towards the discharge outlet 302 without the need for additional power, greatly improving calcination and conveying efficiency while reducing energy consumption. The surfaces of the lifting plates 305 and the inner wall of the rotary kiln 3 are coated with high-temperature and corrosion-resistant materials, extending the service life of the equipment.

[0029] The rotary kiln 3 has an air inlet 304 near the discharge port 302. The air inlet 304 is connected to a gas source via a pipe, and a valve 6 is installed on the pipe. The valve 6 allows for precise control of the incoming gas, providing a suitable atmosphere for catalyst calcination. The rotary kiln 3 has an air outlet 303 located on the lower side wall near the feed port 301. The air outlet 303 is connected to a waste gas purification device 7 via an outlet pipe 701. The waste gas purification device 7 uses a washing bottle with a sealed mouth. The outlet pipe 701 is inserted below the liquid surface in the washing bottle, and the washing bottle mouth also has an exhaust pipe 702, the end of which is above the liquid surface in the washing bottle. The solution in the washing bottle is an alkaline solution, preferably NaOH solution, which can effectively neutralize the acidic and harmful gases in the exhaust gas. The purified gas can be smoothly discharged through the exhaust pipe 702, reducing environmental pollution.

[0030] Work process:

[0031] When used for activity testing of denitrification catalysts, this invention includes the following steps:

[0032] 1) Place the impregnated and dried copper-based catalyst powder into silo 4;

[0033] 2) Open valve 6 to introduce air into rotary kiln 3 through air inlet 304, and the gas in rotary kiln 3 is discharged through air outlet 303;

[0034] 3) Turn on drive motor 1, set the speed, and the rotary kiln 3 will start rotating;

[0035] 4) Open the solid material conveying valve 5, and put the copper-based catalyst powder in the silo 4 into the rotary furnace 3 for calcination;

[0036] 5) During the calcination process, the rotary furnace 3 rotates, and the lifting plate 305 lifts and turns the catalyst, so that it is heated more evenly and moves naturally towards the discharge port 302; the copper-based catalyst after calcination enters the collector 8 from the discharge port 302.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A laboratory denitration catalyst calcination device characterized by, The rotary furnace is provided with a feeding port on one end side wall and a discharging port on the other end side wall, and is connected with a driving motor output shaft near the feeding port, and the feeding port is connected with a stock bin through a conveying device, and the rotary furnace is provided with an air inlet near the discharging port, and is provided with an air outlet below the side wall near the feeding port.

2. The laboratory denitration catalyst calcination device according to claim 1, characterized by, The end of the feeding port of the rotary furnace is higher than the end of the discharging port.

3. The laboratory denitration catalyst calcination device according to claim 2, characterized by, The angle between the axis of the rotary furnace and the horizontal line is 15-30°.

4. The laboratory denitration catalyst calcination device according to claim 1, characterized by, The inner wall of the rotary furnace is provided with a plurality of scoops, which are symmetrically arranged in the inner wall of the rotary furnace.

5. The laboratory denitration catalyst calcination device according to claim 1, characterized by, The air inlet is connected with an air source through a pipeline, and the pipeline is provided with a valve.

6. The laboratory denitration catalyst calcination device according to claim 1, characterized by The conveying device adopts a solid material conveying valve.

7. The laboratory denitration catalyst calcination device according to claim 1, characterized by The driving motor output shaft is connected with the rotary furnace through a shaft coupling.

8. The laboratory denitration catalyst calcination device according to claim 1, characterized by, The air outlet is connected with a waste gas purification device through an air outlet pipe.

9. The laboratory denitration catalyst calcination apparatus according to claim 8, characterized by The waste gas purification device adopts a washing bottle, the bottle mouth of which is sealed, the air outlet pipe is inserted below the liquid level of the washing bottle, and the bottle mouth is further provided with an exhaust pipe, the end of which is located above the liquid level of the washing bottle.

10. The laboratory denitration catalyst calcination device according to claim 1, characterized by, The discharging port is connected with a material collector through a pipeline.

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