Denitration catalyst production device
By optimizing the design in the drying unit and raw material pretreatment unit of the denitrification catalyst production device, the problems of insufficient raw material pretreatment and poor drying effect in traditional devices are solved, and the product quality and drying efficiency of the catalyst are improved.
Patent Information
- Application Number
- CN202520211425.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Traditional denitrification catalyst production equipment has problems such as insufficient pretreatment, poor drying effect and high energy consumption during the raw material pretreatment and drying process, resulting in unstable catalyst performance.
A denitrification catalyst production device is designed to achieve closed-loop control by using a humidity sensor and a controller in the drying unit, and using a detachable bucket cover, multiple discharge ports, and a push plate and screen driven by a rotary shaft in the raw material pretreatment unit to improve the flexibility and efficiency of raw material pretreatment.
It improves the product quality of the catalyst, ensures the uniformity and efficiency of the drying effect, reduces energy consumption, and adapts to raw materials of different particle sizes and properties.
Smart Images
Figure CN222703694U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of denitration catalysts, and in particular relates to a denitration catalyst production device. Background Art
[0002] Nitrogen oxides (NO x ) is one of the main air pollutants, which not only threatens human health, but is also the main cause of haze, acid rain and photochemical smog. x In the technical field, the selective catalytic reduction method has been widely used due to its advantages such as high reliability, no by-products, and simple system installation. In the production process of denitration catalysts, the pretreatment, mixing, molding, drying and calcination of raw materials are key steps. There are some problems with traditional denitration catalyst production equipment, such as insufficient raw material pretreatment, poor drying effect, and high energy consumption. Especially in the drying unit, the performance of the catalyst is often unstable due to the difficulty in controlling the uniformity of drying. Traditional drying methods may not be able to accurately control the humidity during the drying process, thereby affecting the final quality of the catalyst. In addition, the design of the raw material pretreatment unit is often not flexible enough and difficult to adapt to raw materials of different particle sizes and properties. Utility Model Content
[0003] The utility model provides a denitration catalyst production device, which can improve the product quality of the denitration catalyst.
[0004] The technical solution of the utility model is:
[0005] A denitration catalyst production device comprises a raw material pretreatment unit, a raw material mixing unit, a molding unit, a drying unit, a calcination unit and a catalyst assembly unit, wherein the drying unit comprises a drying box, a gas dryer, a fan, a heat exchanger and a controller which are sequentially connected through pipelines, the drying box is connected to the fan through pipelines, a humidity sensor is arranged on the pipeline between the drying box and the fan, the gas dryer, the humidity sensor and the fan are electrically connected to the controller; the outlet of the fan is connected to the cold source inlet of the heat exchanger; the drying box comprises a gas inlet and a box body, a workbench is arranged at the bottom of the box body, a belt conveyor is arranged on the workbench, the gas inlet is connected to the cold source outlet of the heat exchanger, the heat exchanger is arranged with an external steam inlet and an external steam outlet, a hot air duct is arranged in the box body in communication with the gas inlet, two groups of hot air ducts are arranged, the first group of hot The air ducts are evenly arranged below the gas inlet, the second group of hot air ducts are arranged in parallel on the left and right sides of the box body and extend to the bottom of the box body, and an air outlet is arranged at one end of the second group of hot air ducts close to the bottom of the box body; the raw material pretreatment unit includes a raw material filter, the raw material filter includes a cylinder body, a detachable barrel cover is arranged on the cylinder body, a feeding port is arranged on the barrel cover, a first discharge port, a second discharge port and a third discharge port are arranged on the cylinder body, each discharge port is provided with a sealing plug, a rotating shaft is movably installed inside the cylinder body, the rotating shaft is driven by a motor, a first screen and a second screen are arranged from top to bottom through the rotating shaft in the cylinder body, the rotating shaft is rotatably connected to the first screen and the second screen, a cross bar is arranged on the rotating shaft above the first screen, a spiral blade is arranged on the cross bar, and a push plate is arranged on the upper end of the rotating shaft close to the second screen.
[0006] Preferably, the outlet pipeline of the drying box is divided into two parallel pipelines, one of which is provided with a gas dryer, and the outlets of the two parallel pipelines are connected to the inlet of the fan.
[0007] Preferably, the aperture of the first sieve is larger than the aperture of the second sieve.
[0008] Preferably, the pushing plate is in the shape of comb teeth, and the direction of the combing opening is toward the end close to the second screen.
[0009] Preferably, the air outlet portion is in an arc shape inclined upward, and is provided with a plurality of air outlet holes.
[0010] Preferably, a filter screen is provided at the front end of the gas inlet.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] The denitration catalyst production device proposed in the utility model improves the product quality of the catalyst by optimizing the design of the drying unit and the raw material pretreatment unit. The drying unit adopts a humidity sensor and a controller to realize closed-loop control. The heat exchanger and the gas dryer can respectively heat up and dehumidify the drying gas to facilitate the recycling of the drying gas. The heating process can use the steam generated in the production process of the denitration catalyst as a heat source, which improves the utilization efficiency of heat. The drying gas can be dehumidified and dried as needed to ensure the full drying of the denitration catalyst product, improve the drying efficiency, adjust the humidity during the drying process, and ensure the drying effect. At the same time, by setting two sets of hot air ducts, the uniformity of hot air distribution in the drying box is improved, and the drying effect is further improved. The raw material pretreatment unit adopts a detachable barrel cover and multiple discharge ports, a push plate driven by a rotating shaft, and a screen, which makes the pretreatment of raw materials more flexible and efficient, and can adapt to raw materials of different particle sizes and properties, providing high-quality raw materials for subsequent steps. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of a denitration catalyst production device of the utility model.
[0014] Figure 2 It is a structural schematic diagram of a raw material pretreatment unit of the utility model.
[0015] Figure 3 It is a structural schematic diagram of a drying box of the utility model.
[0016] In the figure, 1. raw material pretreatment unit; 2. raw material mixing unit; 3. molding unit; 401. drying box; 402. gas dryer; 403. fan; 404. heat exchanger; 405. humidity sensor; 406. gas inlet; 407. box; 408. workbench; 409. external steam inlet; 410. external steam outlet; 411. first group of hot air ducts; 412. second group of hot air ducts; 413. air outlet; 5. calcination unit; 6. catalyst assembly unit; 701. cylinder; 702. feeding port; 703. first discharge port; 704. second discharge port; 705. third discharge port; 706. rotating shaft; 707. motor; 708. first screen; 709. second screen; 710. cross bar; 711. spiral blade; 712. push plate. DETAILED DESCRIPTION
[0017] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0018] Example 1
[0019] like Figure 1-3 As shown, the denitration catalyst production device includes a raw material pretreatment unit 1, a raw material mixing unit 2, a molding unit 3, a drying unit, a calcination unit 5 and a catalyst assembly unit 6. The drying unit includes a drying box 401, a gas dryer 402, a fan 403, a heat exchanger 404 and a controller which are sequentially connected through pipelines. The drying box 401 is connected to the fan 403 through a pipeline. A humidity sensor 405 is arranged on the pipeline between the drying box 401 and the fan 403. The gas dryer 402, the humidity sensor 405 and the fan 403 are electrically connected to the controller; the outlet pipeline of the drying box 401 is divided into two parallel pipelines, one of which is provided with a gas dryer 402, and the outlets of the two parallel pipelines are connected to the inlet of the fan 403; the outlet of the fan 403 is connected to the cold source inlet of the heat exchanger 404;
[0020] The drying box 401 includes a gas inlet 406 and a box body 407. A filter screen is provided at the front end of the gas inlet 406. A workbench 408 is provided at the bottom of the box body 407. A belt conveyor is provided on the workbench 408. The gas inlet 406 is connected to the cold source outlet of the heat exchanger 404. The heat exchanger 404 is provided with an external steam inlet 409 and an external steam outlet 410. A hot air duct is provided in the box body 407 in communication with the gas inlet 406. The hot air duct is provided with two groups, the first group having a plurality of hot air ducts, and the second group having a plurality of hot air ducts. The first group of hot air ducts 411 are evenly arranged below the gas inlet 406, the second group of hot air ducts 412 are parallelly arranged on the left and right sides of the box 407 and extend to the bottom of the box 407, and the second group of hot air ducts 412 are provided with an air outlet 413 at one end close to the bottom of the box 407. The air outlet 413 is an arc shaped inclined upward, and the air outlet 413 is provided with a plurality of air outlet holes. The first hot air duct and the second hot air duct are used together to make the hot air outlet evenly distributed inside the box 407.
[0021] The raw material pretreatment unit 1 includes a raw material filter, which includes a barrel 701. A detachable barrel cover is provided on the barrel 701, which is not shown in the figure. A feeding port 702 is provided on the barrel cover. A first discharge port 703, a second discharge port 704 and a third discharge port 705 are provided on the barrel 701 from top to bottom. A sealing plug is provided on each discharge port. When discharge is not required, the barrel 701 is sealed. A rotating shaft 706 is movably installed inside the barrel 701. The rotating shaft 706 is driven by a motor 707. The barrel 701 is penetrated by a The rotating shaft 706 is fixed with a first sieve 708 and a second sieve 709 from top to bottom, and the rotating shaft 706 is rotatably connected with the first sieve 708 and the second sieve 709. The aperture of the first sieve 708 is larger than the aperture of the second sieve 709. A cross bar 710 is arranged on the rotating shaft 706 above the first sieve 708, and a spiral blade 711 is arranged on the cross bar 710. A push plate 712 is arranged on the upper end of the rotating shaft 706 near the second sieve 709, and the push plate 712 is comb-shaped, and the direction of the combing mouth is toward the end near the second sieve 709.
[0022] Working process: the raw material is added to the raw material filter through the feeding port 702, the motor 707 drives the rotating shaft 706 to rotate, driving the cross bar 710 and the pushing plate 712 to rotate in the cylinder 701, and the raw material is pushed by the spiral blade 711 and screened by the screen, and is divided into particles of different particle sizes. The qualified raw material is discharged through the first discharge port 703, the second discharge port 704 or the third discharge port 705 according to the particle size. The pushing plate 712 pushes the fine particles close to the second screen 709 to the discharge port to avoid blockage. The pretreated raw materials are mixed to ensure that the components are evenly distributed. The mixed raw materials are molded to form a catalyst precursor with a certain shape and size; the molded catalyst precursor enters the drying box 401, and the heat exchanger 404 uses the circulating dry gas or external steam to heat to generate high-temperature gas. The high-temperature gas is evenly blown into the drying box 401 through the hot air duct to dry the catalyst precursor. The humidity sensor 405 monitors the humidity in the drying box 401 in real time and transmits the signal to the controller. The controller adjusts the speed of the fan 403 and / or the working state of the gas dryer 402 according to the humidity signal to control the humidity during the drying process. The dried catalyst precursor is discharged through the outlet pipeline. The dried catalyst precursor enters the calcination unit 5 for high-temperature treatment to form the final denitration catalyst. The calcined catalyst is assembled to form a catalyst product that can be used for industrial denitration.
Claims
1. A denitration catalyst production device, characterized in that: The invention comprises a raw material pretreatment unit (1), a raw material mixing unit (2), a molding unit (3), a drying unit, a calcining unit (5) and a catalyst assembly unit (6); the drying unit comprises a drying box (401), a gas dryer (402), a fan (403), a heat exchanger (404) and a controller which are sequentially connected via pipelines; the drying box (401) and the fan (403) are connected via pipelines; a humidity sensor (405) is arranged on the pipeline between the drying box (401) and the fan (403); the gas dryer (402), the humidity sensor (405) and the fan (403) are electrically connected to the controller; the outlet of the fan (403) is connected to the cold source inlet of the heat exchanger (404); The drying box (401) comprises a gas inlet (406) and a box body (407). A workbench (408) is provided at the bottom of the box body (407). A belt conveyor is provided on the workbench (408). The gas inlet (406) is connected to a cold source outlet of a heat exchanger (404). The heat exchanger (404) is provided with an external steam inlet (409) and an external steam outlet (410). A hot air duct is provided in the box body (407) and is connected to the gas inlet (406). Two groups of hot air ducts are provided. The first group of hot air ducts (411) are evenly provided below the gas inlet (406). The second group of hot air ducts (412) are provided in parallel on the left and right sides of the box body (407) and extend to the bottom of the box body (407). An air outlet (413) is provided at one end of the second group of hot air ducts (412) close to the bottom of the box body (407). The raw material pretreatment unit (1) comprises a raw material filter, which comprises a barrel (701), a detachable barrel cover is provided on the barrel (701), a feeding port (702) is provided on the barrel (701), a first discharge port (703), a second discharge port (704) and a third discharge port (705) are provided on the barrel (701), each discharge port is provided with a sealing plug, a rotating shaft (706) is movably installed inside the barrel (701), and the rotating shaft (706) is driven by a motor (707). A first screen (708) and a second screen (709) are arranged from top to bottom through a rotating shaft (706) running through the body (701); the rotating shaft (706) is rotatably connected to the first screen (708) and the second screen (709); a cross bar (710) is arranged above the first screen (708) on the rotating shaft (706); a spiral blade (711) is arranged on the cross bar (710); and a push plate (712) is arranged at the upper end of the rotating shaft (706) close to the second screen (709).
2. The denitration catalyst production device according to claim 1, characterized in that: The outlet pipeline of the drying box (401) is divided into two parallel pipelines, one of which is provided with a gas dryer (402), and the outlets of the two parallel pipelines are connected to the inlet of the fan (403).
3. The denitration catalyst production device according to claim 1, characterized in that: The aperture of the first sieve (708) is larger than the aperture of the second sieve (709).
4. The denitration catalyst production device according to claim 1, characterized in that: The pushing plate (712) is in the shape of comb teeth, with the comb opening facing the end close to the second screen (709).
5. The denitration catalyst production device according to claim 1, characterized in that: The air outlet portion (413) is in an arc shape that is inclined upward, and is provided with a plurality of air outlet holes.
6. The denitration catalyst production device according to claim 1, characterized in that: A filter screen is provided at the front end of the gas inlet (406).