Catalyst roasting furnace with wireless temperature detection function and temperature control method

Abstract

The present invention discloses a catalyst roasting furnace with wireless temperature detection function and a temperature control method. The roasting furnace includes a furnace, a feeding zone, a cooling zone, a discharge pipe, and a wireless temperature sensor. The feeding zone is connected to one end of the furnace, the cooling zone is connected to the other end of the furnace, and the discharge pipe is connected to the cooling zone. The wireless temperature sensor is disposed inside the furnace. The present invention can detect the temperature of the material in the catalyst roasting furnace, obtain the temperature distribution in the furnace, and more intuitively obtain the actual temperature of the material. At the same time, by controlling key data in the model, the catalyst roasting temperature is precisely controlled, thereby increasing the catalyst pore volume and specific surface area by more than 10%.

Description

Technical Field

[0001] The invention discloses a catalyst roasting furnace, in particular to a catalyst roasting furnace with a wireless temperature detection function and a temperature control method, belonging to the technical field of catalyst production devices and applications. Background Art

[0002] Years of experience in catalyst production and application have demonstrated that market requirements for catalyst quality have evolved from relatively crude standards to increasingly refined ones. As market demands for catalyst quality increase, so too do the requirements for catalyst calcination equipment. Calcination is a key process in the preparation of hydrogenation catalysts. Since most of these catalysts use alumina-containing supports, the type of Al2O3 phase formed is crucial. The calcination temperature directly influences this phase formation, and therefore, monitoring and controlling the calcination temperature significantly impacts catalyst performance.

[0003] Under the current market conditions, there is an urgent need for an effective temperature detection method and temperature control system to achieve precise control of the feed, temperature, etc. of the roasting furnace, so as to achieve the goal of improving the overall quality of the roasting material.

[0004] In comparison, while domestic rotary roaster manufacturing technology has reached or is approaching world-leading levels, there's still a significant gap in precise temperature measurement and control. Rotary roasters are widely used in catalyst production, and the development of advanced, precise material temperature measurement and control systems is crucial for further improving product quality and reducing energy consumption. Therefore, the development of wireless temperature detection technology and control systems for roasters is imperative. Summary of the Invention

[0005] In response to the above-mentioned shortcomings of the prior art in rotary roasting furnaces in terms of poor accurate measurement and control of temperature, the present invention provides a new catalyst roasting furnace and temperature control method with wireless temperature detection function, which detects the material and furnace temperature through a temperature sensor arranged inside the furnace, and combines the roasting furnace rotation information to achieve accurate measurement and control of the rotary roasting furnace temperature.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a catalyst roasting furnace with a wireless temperature detection function, the roasting furnace includes a furnace, a feeding area, a cooling area, a discharge pipe and a wireless temperature sensor, the feeding area is connected to one end of the furnace, the cooling area is connected to the other end of the furnace, the discharge pipe is connected to the cooling area, and the wireless temperature sensor is arranged inside the furnace.

[0007] A temperature control method, in which the general temperature wave function model of the material temperature inside the roasting furnace cylinder is:

[0008] T=A0+ATsin(ʎt)

[0009] in,

[0010] T is the temperature value of a certain measuring point on the inner wall of the roasting furnace;

[0011] A0 is the average temperature of a certain measuring point on the inner wall of the roasting furnace during one rotation of the inner wall;

[0012] AT is the temperature fluctuation amplitude of a certain measuring point on the inner wall of the roasting furnace during one rotation of the inner wall;

[0013] t is the roaster operation time, and the initial value is when the roaster measurement point is rotated to 180°;

[0014] ʎ corresponds to the rotation speed of the roasting furnace;

[0015] The parameters of the universal temperature wave function model are used as control indicators to adjust the relevant parameters of the roasting furnace. Among them, A0 and ʎ are detection parameters, and AT is the control parameter. When A0 is in different temperature ranges and ʎ is a fixed value, different AT control values ​​are adjusted to control the material temperature.

[0016] The technical solution adopted by the present invention to solve the technical problem further includes:

[0017] The feeding area is provided with a material inlet, and the discharging pipe is provided with a material outlet.

[0018] The feed zone is provided with a carrier gas outlet, and the discharge pipe is provided with a carrier gas inlet.

[0019] There is more than one wireless temperature sensor, which is inserted into the roasting furnace cylinder from the end face of the roasting furnace feed end. The more than one wireless temperature sensor is evenly distributed circumferentially along the center of the roasting furnace. The tail of the wireless temperature sensor is inserted into the roasting furnace, and the head of the wireless temperature sensor is exposed to the outside of the roasting furnace, and a heat dissipation distance of not less than 150 mm is reserved. The head of the wireless temperature sensor is connected to a wireless temperature transmitter.

[0020] The interior of the furnace is divided into a heating zone and a roasting zone. Four wireless temperature sensors are installed in the axial direction inside the roasting furnace barrel, corresponding to the feeding zone, heating zone, roasting zone and cooling zone respectively.

[0021] The baking furnace is an external heating type baking furnace, and a first furnace temperature sensor, a second furnace temperature sensor, a third furnace temperature sensor and a fourth furnace temperature sensor are installed at equal distances on the furnace of the baking furnace.

[0022] The roasting furnace is equipped with a driving gear.

[0023] An absolute value encoder is installed on the driving gear.

[0024] The feed end of the roasting furnace is equipped with a proximity switch, which is installed on the material inlet.

[0025] The beneficial effects of the present invention are as follows: the present invention can realize the detection of the material temperature in the catalyst roasting furnace, obtain the temperature distribution in the furnace, and more intuitively obtain the actual temperature of the material. At the same time, by controlling the key data in the model, the catalyst roasting temperature is precisely controlled, thereby increasing the catalyst pore volume and specific surface area by more than 10%.

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the roasting furnace of the present invention.

[0028] In the figure, 1-furnace, 2-feeding area, 3-heating area, 4-roasting area, 5-cooling area, 6-discharge pipe, 7-material inlet, 8-carrier gas outlet, 9-carrier gas inlet, 10-material outlet, 11-drive gear, 12-proximity switch, 13-first furnace temperature sensor, 14-second furnace temperature sensor, 15-third furnace temperature sensor, 16-fourth furnace temperature sensor, 17-wireless temperature sensor. DETAILED DESCRIPTION

[0029] This embodiment is a preferred implementation manner of the present invention. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the scope of protection of the present invention.

[0030] Please see attached Figure 1 The present invention mainly protects a catalyst roasting furnace with a wireless temperature detection function. The roasting furnace mainly includes a furnace 1, a feeding area 2, a cooling area 5, a discharge pipe 6 and a wireless temperature sensor 17. The feeding area 2 is connected to one end of the furnace 1, the cooling area 5 is connected to the other end of the furnace 1, the discharge pipe 6 is connected to the cooling area 5, and the wireless temperature sensor 17 is arranged inside the furnace 1.

[0031] In this embodiment, a material inlet 7 is provided on the feed area 2 for feeding materials; a material outlet 10 is provided on the discharge pipe 6 for discharging materials.

[0032] Since the catalyst requires gas protection during the roasting process, in this embodiment, a carrier gas outlet 8 is provided on the feed zone 2 for discharging the carrier gas; a carrier gas inlet 9 is provided on the discharge pipe 6 for inputting protective gas for protection.

[0033] In this embodiment, the roasting furnace is an externally heated roasting furnace. In this embodiment, a first furnace temperature sensor 13, a second furnace temperature sensor 14, a third furnace temperature sensor 15, and a fourth furnace temperature sensor 16 are installed at equal distances on the furnace 1 of the roasting furnace, respectively, for auxiliary detection of the temperature in the furnace 1.

[0034] In this embodiment, more than one wireless temperature sensor 17 is provided, and the specific number is set according to actual needs. The wireless temperature sensor 17 is inserted into the roasting furnace cylinder from the end face of the roasting furnace feed end. More than one wireless temperature sensor 17 is evenly distributed circumferentially along the center of the roasting furnace. The tail end (i.e., the detection end) of the wireless temperature sensor 17 is inserted into the roasting furnace. The position of the tail end is determined according to the requirements of the temperature measuring point. The head of the wireless temperature sensor 17 is exposed to the outside of the roasting furnace, and a heat dissipation distance of not less than 150 mm is reserved. The head of the wireless temperature sensor 17 is connected to a wireless temperature transmitter (not shown in the figure. The wireless temperature sensor and the invalid temperature transmitter in the present invention both adopt the temperature sensor and temperature transmitter commonly used in the prior art), wherein the wireless temperature sensor 17 is used to convert the detected temperature measurement value into an electrical signal, and the wireless temperature transmitter converts the electrical signal into a high-frequency wireless signal and transmits it to the controller.

[0035] In this embodiment, the interior of the furnace 1 is artificially divided into a heating zone 3 and a roasting zone 4. Four wireless temperature sensors 17 are provided. The four wireless temperature sensors 17 are installed along the axial direction inside the roasting furnace barrel. The detection ends of the four wireless temperature sensors 17 are respectively corresponding to the feeding zone 2, the heating zone 3, the roasting zone 4, and the cooling zone 5. In this embodiment, the overall length of the roasting furnace is 21 meters. The detection ends of the four wireless temperature sensors 17 are respectively installed at 900 mm, 4400 mm, 14000 mm, and 19400 mm from the material inlet 7, corresponding to the roasting furnace feeding zone, heating zone, roasting zone, and cooling zone, respectively.

[0036] In this embodiment, a driving mechanism is installed on the roasting furnace for driving the roasting furnace to rotate. The driving mechanism adopts a driving gear 11, and the driving gear 11 is installed in the feeding area 2. During specific implementation, the driving gear 11 can also be fixedly installed on the furnace 1 according to actual needs, or installed on the cooling area 5, or other driving means commonly used in the prior art can be used to drive the roasting furnace to rotate.

[0037] In this embodiment, an absolute encoder (not shown) is mounted on the drive gear 11 to detect the rotation angle of the drive gear 11. A proximity switch 12 is mounted at the feed end to detect the position of the drum. In this embodiment, the proximity switch 12 is mounted on the material inlet 7. The material temperature inside the roasting furnace drum, the roasting furnace chamber temperature, and the position detection signals are connected to the PLC temperature control system, which is linked to the roasting furnace chamber temperature control system.

[0038] The present invention also protects a temperature control method, in which a universal model of the temperature of the material inside the roasting furnace cylinder is a wave function of the average value, fluctuation amplitude, and cylinder rotation speed of the temperature of the material and carrier gas in the furnace. The universal wave function model is:

[0039] T=A0+ATsin(ʎt)

[0040] in,

[0041] T is the temperature value of a measurement point on the inner wall of the roasting furnace. This measurement point rotates to different radial positions of the roasting furnace over time. When the measurement point rotates to the bottom of the roasting furnace, it is buried by the material, and the material temperature is measured. When the measurement point rotates to the upper part of the roasting furnace, the measurement point is exposed from the material, and the furnace and carrier gas temperatures are measured. In this embodiment, the selection of measurement points varies depending on the type of catalyst being roasted. One or more measurement points can be selected as needed, and each measurement point controls the temperature of the corresponding detection area of ​​the device.

[0042] A0 is the average temperature of a certain measuring point on the inner wall of the roasting furnace during one rotation of the inner wall;

[0043] AT is the temperature fluctuation amplitude of a certain measuring point on the inner wall of the roasting furnace during one rotation of the inner wall. Since the present invention adopts an external heating method, the temperature of different areas on the cross section based on a certain measuring point can be controlled at different temperature values;

[0044] t is the roaster operation time, and the initial value is when the roaster measurement point is rotated to 180° (where 0° is the lowest point);

[0045] ʎ corresponds to the rotation speed of the roaster.

[0046] The temperature wave function parameters of the general model are used as control indicators to adjust the relevant parameters of the roasting furnace, wherein A0 and ʎ are detection parameters, and AT is a control parameter. When A0 is in different temperature ranges and ʎ is a fixed value, different AT control values ​​are adjusted to control the material temperature. The purpose of the adjustment is to improve the product quality. By well controlling the material temperature, the pore volume and specific surface area of ​​the catalyst product can be improved, while reducing the energy consumption of the product.

[0047] The present invention can detect the temperature of the material in the catalyst roasting furnace, obtain the temperature distribution in the furnace, and more intuitively obtain the actual temperature of the material. At the same time, by controlling the key data in the model, the catalyst roasting temperature is precisely controlled, thereby increasing the catalyst pore volume and specific surface area by more than 10%.

[0048] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims of the present invention.

Claims

1. A temperature control method for a catalyst roasting furnace with a wireless temperature detection function, characterized by: The roasting furnace comprises a furnace (1), a feeding zone (2), a cooling zone (5), a discharge pipe (6) and a wireless temperature sensor (17), wherein the feeding zone (2) is connected to one end of the furnace (1), the cooling zone (5) is connected to the other end of the furnace (1), the discharge pipe (6) is connected to the cooling zone (5), and the wireless temperature sensor (17) is arranged inside the furnace (1); The temperature control method is that the general temperature wave function model of the material temperature inside the roasting furnace cylinder is: T=A0+ATsin(ʎt) in, T is the temperature value of a certain measuring point on the inner wall of the roasting furnace; A0 is the average temperature of a certain measuring point on the inner wall of the roasting furnace during one rotation of the inner wall; AT is the temperature fluctuation amplitude of a certain measuring point on the inner wall of the roasting furnace during one rotation of the inner wall; t is the roaster operation time, and the initial value is when the roaster measurement point is rotated to 180°; ʎ corresponds to the rotation speed of the roaster; The parameters of the universal temperature wave function model are used as control indicators to adjust the relevant parameters of the roasting furnace. Among them, A0 and ʎ are detection parameters, and AT is the control parameter. When A0 is in different temperature ranges and ʎ is a fixed value, different AT control values ​​are adjusted to control the material temperature.

2. The temperature control method of the catalyst roasting furnace with wireless temperature detection function according to claim 1 is characterized in that: The feed zone (2) is provided with a material inlet (7), and the discharge pipe (6) is provided with a material outlet (10).

3. The temperature control method of a catalyst roasting furnace with wireless temperature detection function according to claim 1, characterized in that: The feed zone (2) is provided with a carrier gas outlet (8), and the discharge pipe (6) is provided with a carrier gas inlet (9).

4. The temperature control method of a catalyst roasting furnace with wireless temperature detection function according to claim 1, characterized in that: The wireless temperature sensor (17) is provided with more than one, and the wireless temperature sensor (17) is inserted into the roasting furnace cylinder from the end face of the roasting furnace feed end, and the more than one wireless temperature sensor (17) is evenly distributed along the circumference of the roasting furnace center, and the tail of the wireless temperature sensor (17) is inserted into the roasting furnace, and the head of the wireless temperature sensor (17) is exposed outside the roasting furnace, and a heat dissipation distance of not less than 150 mm is reserved, and the head of the wireless temperature sensor (17) is connected to a wireless temperature transmitter.

5. The temperature control method of the catalyst roasting furnace with wireless temperature detection function according to claim 1, characterized in that: The interior of the furnace (1) is divided into a heating zone (3) and a roasting zone (4), and four wireless temperature sensors (17) are provided. The four wireless temperature sensors (17) are installed along the axial direction inside the roasting furnace barrel, corresponding to the feeding zone (2), the heating zone (3), the roasting zone (4) and the cooling zone (5), respectively.

6. The temperature control method of a catalyst roasting furnace with wireless temperature detection function according to claim 1, characterized in that: The roasting furnace is an external heating roasting furnace, and a first furnace temperature sensor (13), a second furnace temperature sensor (14), a third furnace temperature sensor (15) and a fourth furnace temperature sensor (16) are installed at equal distances on the furnace (1) of the roasting furnace.

7. The temperature control method of a catalyst roasting furnace with wireless temperature detection function according to claim 1, characterized in that: A driving gear (11) is installed on the roasting furnace.

8. The temperature control method of a catalyst roasting furnace with wireless temperature detection function according to claim 7, characterized in that: An absolute encoder is installed on the driving gear (11).

9. The temperature control method of a catalyst roasting furnace with wireless temperature detection function according to claim 1, characterized in that: The feed end of the roasting furnace is provided with a proximity switch (12), which is installed on the material inlet (7).

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