CN112624112B

CN112624112B - Method and system for detecting high-temperature activated carbon and cooling blanking channel

Info

Publication number: CN112624112B
Application number: CN202110026462.0A
Authority: CN
Inventors: 刘雁飞; 周浩宇; 陈思墨
Original assignee: Hunan Zhongye Changtian Energy Conservation And Environmental Protection Technology Co ltd; Zhongye Changtian International Engineering Co Ltd
Current assignee: Hunan Zhongye Changtian Energy Conservation And Environmental Protection Technology Co ltd; Zhongye Changtian International Engineering Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2022-12-02
Anticipated expiration: 2041-01-08
Also published as: CN112624112A

Abstract

A method for detecting high-temperature activated carbon and cooling a blanking channel comprises the following steps: 1) The thermal imager shoots the material entering the imaging area in real time to obtain a thermal imaging graph; 2) Analyzing whether the material entering the imaging area has a high temperature point or not according to the thermal imaging graph; 2a) If the area does not have the high temperature point, repeating the step 1); 2b) If the area has a suspected high temperature point, recording the found position of the material at the high temperature point in a second detection area on the vibrating screen and giving an alarm; 3) And according to the found position of the material at the high-temperature point in the second detection area on the vibrating screen, extinguishing the fire and reducing the temperature of the material at the position on the screen by using an activated carbon channel. According to the invention, the high-temperature activated carbon is detected in the screening step of the activated carbon flue gas purification device and is treated at the passage of the activated carbon on the screen, so that the high-temperature activated carbon is found and cooled in time, the problem that the high-temperature activated carbon is difficult to detect comprehensively is solved, and the safety of the system is improved.

Description

Method and system for detecting high-temperature activated carbon and cooling blanking channel

Technical Field

The invention relates to detection and treatment of high-temperature activated carbon particles in an activated carbon flue gas purification device, in particular to a method and a system for high-temperature detection of activated carbon and cooling of a blanking channel, and belongs to the technical field of activated carbon flue gas purification.

Background

The amount of flue gas generated in the sintering process accounts for about 70 percent of the total flow of steel, and the main pollutant components in the sintering flue gas are dust and SO ₂ 、NO _X (ii) a In addition, a small amount of VOCs, dioxin, heavy metals and the like are also added; the waste water can be discharged after purification treatment. At present, the technology of treating sintering flue gas by using an activated carbon desulfurization and denitrification device is mature, and the activated carbon desulfurization and denitrification device is popularized and used in China, so that a good effect is achieved.

The working schematic diagram of the activated carbon desulfurization and denitrification device in the prior art is shown in figure 1: raw flue gas (SO is the main component of pollutant) generated in the sintering process ₂ ) The flue gas is discharged as clean flue gas after passing through an active carbon bed layer of the adsorption tower; adsorbing pollutants (the main component of the pollutants is SO) in the flue gas ₂ ) The activated carbon is sent into an analysis tower through an activated carbon conveyor S1, the activated carbon adsorbed with pollutants in the analysis tower is heated to 400-430 ℃ for analysis and activation, SRG (sulfur-rich) gas released after analysis and activation is subjected to an acid making process, the activated carbon after analysis and activation is discharged out of the analysis tower after being cooled to 110-130 ℃, activated carbon dust is screened out by a vibrating screen, and the screened activated carbon particles enter an adsorption tower again through an activated carbon conveyor S2; fresh activated carbon is added to the conveyor S1 (the activated carbon used in the activated carbon flue gas cleaning device is cylindrical activated carbon particles with typical sizes: 9mm in diameter and 11mm in height).

As shown in fig. 1, the activated carbon is heated to 400-430 ℃ in the desorption tower, and the burning point temperature of the activated carbon used by the activated carbon flue gas purification device is 420 ℃; the desorption column was of a gas-tight construction and was filled with nitrogen.

The schematic structure of the prior art desorption tower is shown in fig. 2: the active carbon is not contacted with air in the desorption tower so as to ensure that the active carbon is not burnt in the desorption tower; in the process of heating and cooling the activated carbon in the desorption tower, occasionally, a small amount of heated activated carbon particles are not sufficiently cooled in the cooling section, and a small amount of high-temperature activated carbon particles which are not cooled to a safe temperature are discharged from the desorption tower (the amount of activated carbon particles filled in the desorption tower of the sintering flue gas purification device exceeds hundreds of tons, and the processes of flowing, cooling, heating, heat conduction and the like of the activated carbon particles in the desorption tower are complicated). The high-temperature activated carbon particles are discharged from the desorption tower and then contact with air, spontaneous combustion (smoldering and flameless) can occur, a small amount of high-temperature activated carbon particles of the spontaneous combustion can possibly ignite low-temperature activated carbon particles around the high-temperature activated carbon particles, the high-temperature activated carbon particles of the spontaneous combustion can enter each link of the flue gas purification device along with the circulation of the activated carbon, the safe and stable operation of the sintering activated carbon flue gas purification system is threatened, and the sintering activated carbon flue gas purification device has the requirement of detecting and disposing the high-temperature spontaneous combustion activated carbon particles. As shown in fig. 1, the sintered activated carbon flue gas purification device circulates between the desorption tower and the adsorption tower, and all links such as the desorption tower, the adsorption tower, the conveyor, the vibrating screen, the buffer bin and the like are all of airtight structures.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a method and a system for detecting the high temperature of activated carbon and cooling a blanking channel. According to the invention, the thermal imager is arranged above the vibrating screen cover plate of the activated carbon flue gas purification device, the thermal imager firstly shoots materials entering an imaging area to obtain a thermal imaging image, then analyzes and judges whether the materials have high temperature points or not, records the found positions of the materials at the high temperature points in the imaging area, and then extinguishes and cools the detected high temperature materials through the activated carbon extinguishing and cooling device arranged on the on-screen activated carbon channel between the vibrating screen and the conveyor. According to the technical scheme provided by the invention, the spontaneous combustion or high-temperature activated carbon is detected in the vibration screening link of the activated carbon flue gas purification device, and can be timely positioned and processed, so that the high-temperature spontaneous combustion of the activated carbon in subsequent processes is avoided, the problem that high-temperature activated carbon particles are difficult to comprehensively detect and dispose is solved, and the safety of the system is improved.

According to a first embodiment of the invention, a method for detecting high-temperature activated carbon and cooling at a blanking channel is provided.

A method for detecting high-temperature activated carbon and cooling a blanking channel comprises the following steps:

1) The method comprises the following steps that materials enter a vibrating screen, and a thermal imager shoots the materials entering a first detection area on the vibrating screen in real time to obtain a primary thermal imaging graph;

2) Analyzing and judging whether the material entering the first detection area has a high temperature point or not according to the primary thermal imaging image;

2a) If the primary thermal imaging image is judged not to have the high temperature point, repeating the step 1);

2b) If the primary thermal imaging image is judged to have suspected high-temperature points, performing step 3);

3) A thermal imager tracks and shoots a secondary thermal image of the material at the suspected high-temperature point entering a second detection area on the vibrating screen, and further judges whether the suspected high-temperature point is a high-temperature point;

3a) If the suspected high temperature point is a false high temperature point, repeating the step 1);

3b) If the suspected high-temperature point is determined as the high-temperature point, recording the found position of the material at the high-temperature point in a second detection area on the vibrating screen and giving an alarm;

4) The activated carbon extinguishing and cooling device arranged at the position of the activated carbon channel on the screen between the vibrating screen and the conveyor extinguishes and cools the detected high-temperature material.

Wherein the first detection zone is located upstream of the second detection zone on the shaker screen.

In the invention, in the step 4), the activated carbon extinguishing and cooling device is a gas blowing device; the fire extinguishing and cooling treatment comprises the following steps: the gas blowing device arranged on the active carbon channel on the screen blows the fire extinguishing gas to the detected high-temperature material, thereby realizing the extinguishing and cooling of the high-temperature material.

Preferably, in the fire-extinguishing and temperature-reducing process according to step 4), the mass flow rate of the fire-extinguishing gas blown by the gas blowing device satisfies the following relational expression:

wherein: LL (LL) _N The flow of the fire extinguishing gas which is blown in the quenching and cooling treatment process of the active carbon is kg/s. C _ht The specific heat capacity of the activated carbon is kJ/(kg. DEG C). LL (LL) _ht The flow rate of the activated carbon to be quenched and cooled is kg/s. Delta T _ht In order to adopt the fire extinguishing gas to extinguish the temperature of the active carbon in the cooling process, the temperature is higher than the temperature of the active carbon. Delta T _N The temperature of the fire extinguishing gas is increased after the fire extinguishing gas is extinguished and cooled. C _N The specific heat capacity of the fire extinguishing gas is kJ/(kg DEG C). K _N1 To the rate at which the fire suppressing gas participates in the cooling of the activated carbon,K _N1 ＜1。K _N2 for the participation of extinguishing gas in the cooling process of activated carbon, K _N2 ＜1。

In the fire extinguishing and temperature reducing treatment of the step 4), the mass flow rate of the cooling water sprayed by the cooling water spraying device satisfies the following relational expression:

wherein: LL (LL) _H1 The flow of cooling water sprayed out in the extinguishing and cooling process of the active carbon is kg/s. C _ht The specific heat capacity of the activated carbon is kJ/(kg. DEG C). LL (LL) _ht The flow rate of the activated carbon to be quenched and cooled is kg/s. Delta T _ht1 In order to quench the target temperature of the active carbon in the cooling process by using cooling water, the temperature is controlled. C _H1 The specific heat capacity of water at the evaporation temperature, kJ/(kg. DEG C.). T is a unit of _e1 The evaporation temperature of water, DEG C. T is a unit of _e2 Is the initial temperature of the cooling water, DEG C. C _H2 The specific heat capacity of water at the initial temperature, kJ/(kg. DEG.C.). h is a total of _hz Is the latent heat of vaporization of water at the evaporation temperature, kJ/kg.

In the invention, in the step 4), the activated carbon extinguishing cooling device comprises an activated carbon extinguishing device and an activated carbon cooling device. Wherein, the active carbon extinguishing device is a gas blowing device. The active carbon cooling device is a cooling water spraying device. The fire extinguishing and cooling treatment comprises the following steps: the extinguishing treatment of the high-temperature materials is completed by blowing the detected high-temperature materials through the gas blowing device arranged on the on-screen activated carbon channel, and the cooling water is sprayed on the detected high-temperature materials through the cooling water spraying device arranged on the on-screen activated carbon channel to complete the cooling treatment of the high-temperature materials.

Preferably, in the fire extinguishing and temperature reducing treatment in step 4), the gas spraying device sprays fire extinguishing gas to the detected high-temperature material, and the cooling water spraying device sprays cooling water to the detected high-temperature material. Wherein the flow rate V of the fire extinguishing gas blown by the gas blowing device _N The following formula is satisfied:

in the formula: v _N The flow of the fire extinguishing gas, m, blown in the process of extinguishing the activated carbon ³ /s。S _T Is the cross-sectional area of the activated carbon channel on the sieve, m ² 。L ₂ Is the height difference m between the nozzle position of the gas injection device and the nozzle position of the cooling water spraying device. t is t _i0 And (4) the time s for the high-temperature material to move from the detected high-temperature point position to the nozzle position of the gas blowing device.

Water spray quantity LL of cooling water spraying device _H2 The following formula is satisfied:

in the formula: LL (LL) _H2 The flow rate of cooling water sprayed in the cooling treatment process of the active carbon is kg/s. C _ht The specific heat capacity of the activated carbon is kJ/(kg-DEG C). LL (LL) _ht The flow rate of the activated carbon to be cooled is kg/s. Delta T _ht2 Is the target of active carbon temperature reduction. C _H1 The specific heat capacity of water at the evaporation temperature, kJ/(kg. DEG C.). T is a unit of _e1 The evaporation temperature of water is measured in deg.C. T is a unit of _e2 The initial temperature of the cooling water is DEG C. C _H2 The specific heat capacity of water at the initial temperature, kJ/(kg. DEG.C.). h is _hz The latent heat of vaporization of water at the evaporation temperature, kJ/kg.

Preferably, the vibrating screen is provided with a cover plate, and the material entering the vibrating screen moves along the length direction of the vibrating screen.

In step 1), the thermal imager shoots the material entering the first detection area in real time to obtain a primary thermal imaging diagram, which specifically comprises:

1a) The cover plate of the vibrating screen is provided with an opening, the observation device is arranged above the opening and covers the opening, the thermal imager is arranged above the cover plate, and the observation device is positioned between the cover plate and the thermal imager;

1b) The thermal imaging system shoots the material entering the first detection area on the vibrating screen in real time through the observation device and the opening hole to obtain a thermal imaging image.

Preferably, in step 3), the thermal imager tracks and shoots a secondary thermal imaging graph of the material at the suspected high-temperature point entering the second detection area, specifically:

the thermal imaging instrument reciprocates in a vertical plane around the observation device, and detects the material entering a suspected high-temperature point in a second detection area on the vibrating screen through the observation device to obtain a secondary thermal imaging graph.

Preferably, in step 3), judging whether the suspected high temperature point is a high temperature point according to the secondary thermal imaging map, specifically:

dividing the secondary imaging graph into n areas, obtaining the highest temperature of each area in the n areas, selecting the highest temperature value T2 in the n highest temperatures, and comparing the highest temperature value T2 with the set target temperature T0. If T2 is less than or equal to T0, the suspected high temperature point is a false high temperature point. And if T2 is larger than T0, confirming that the suspected high temperature point is the high temperature point. And determining the found position of the material at the high temperature point in a second detection area on the vibrating screen and giving an alarm through the area of the highest temperature value T2 corresponding to the secondary thermal imaging graph.

According to a second embodiment of the invention, a system for high temperature activated carbon detection and cooling at a blanking channel is provided.

The system comprises a thermal imaging instrument, a vibrating screen, an active carbon extinguishing cooling device, an on-screen active carbon channel and a conveyor. And an oversize activated carbon outlet of the vibrating screen is connected with a feed inlet of the conveyor through an oversize activated carbon channel. The vibrating screen is provided with a cover plate. The thermal imaging camera is arranged above the vibrating screen cover plate. An imaging area is arranged on the vibrating screen. The imaging zone includes a first detection zone and a second detection zone. On the shaker, the first detection zone is located upstream of the second detection zone. The activated carbon extinguishing cooling device is arranged on the activated carbon channel on the screen.

In the invention, the activated carbon extinguishing and cooling device is a gas blowing device. The gas blowing device comprises a gas conveying main pipe, a gas conveying branch pipe and a gas nozzle. The gas delivery main pipe is arranged outside the activated carbon channel on the screen. The gas delivery branch pipe is arranged on the active carbon channel on the sieve. One end of the gas delivery branch pipe is connected with the gas delivery main pipe, and the other end of the gas delivery branch pipe extends into the active carbon channel on the screen. The tail end of the gas conveying branch pipe is provided with a gas nozzle. Preferably, the gas delivery main pipe is provided with a gas valve for controlling the opening and closing of the gas blowing device.

Preferably, the number of gas delivery branches is a plurality, preferably 2 to 30, more preferably 3 to 16. Each gas conveying branch pipe is connected with a gas conveying main pipe, and the plurality of gas conveying branch pipes are uniformly distributed along the periphery of the on-screen activated carbon channel. Preferably, the gas nozzles are located at the lower side of the distal end of the gas delivery manifold.

In the invention, the activated carbon extinguishing cooling device is a cooling water spraying device. The cooling water spraying device comprises a cooling water conveying main pipe, a cooling water conveying branch pipe and a cooling water nozzle. The cooling water delivery main pipe is arranged outside the active carbon channel on the screen. The cooling water conveying branch pipe is arranged on the active carbon channel on the screen. One end of the cooling water delivery branch pipe is connected with the cooling water delivery main pipe, and the other end of the cooling water delivery branch pipe extends into the active carbon channel on the screen. The tail end of the cooling water conveying branch pipe is provided with a cooling water nozzle. Preferably, a cooling water valve is arranged on the cooling water conveying main pipe, and the cooling water valve controls the cooling water spraying device to be opened and closed.

Preferably, the number of the cooling water supply branch pipes is plural, preferably 2 to 30, and more preferably 3 to 16. Each cooling water conveying branch pipe is connected with a cooling water conveying main pipe, and the cooling water conveying branch pipes are uniformly distributed along the periphery of the on-screen activated carbon channel. Preferably, the cooling water nozzles are located at the lower side of the distal ends of the cooling water delivery branch pipes.

In the invention, the activated carbon extinguishing cooling device comprises an activated carbon extinguishing device and an activated carbon cooling device. Wherein, the active carbon extinguishing device is a gas blowing device arranged on the active carbon channel on the screen. The active carbon cooling device is a cooling water spraying device arranged on the active carbon channel on the screen.

Preferably, the cooling water supply branch pipe of the cooling water spraying device is disposed below the gas supply branch pipe of the gas blowing device.

Preferably, the system further comprises a viewing device, the viewing device is arranged on the upper part of the vibrating screen cover plate and is positioned between the vibrating screen cover plate and the thermal imaging camera. The viewing device includes a sidewall shroud, a top viewing aperture and a bottom viewing aperture. The top observation hole is defined by the top edge of the side wall cover body. The area enclosed by the bottom edge of the side wall cover body is the bottom observation hole. Preferably, the cover plate of the vibrating screen is provided with an opening, and the bottom observation hole of the observation device is equal to the opening in the cover plate in size and is superposed with the opening in position. Preferably, the width of the openings is equal or substantially equal to the width of the vibrating screen.

The thermal imaging system moves back and forth in a vertical plane around the observation device, and shoots materials entering a first detection area and/or a second detection area on the vibrating screen in real time through the observation device to obtain a primary thermal imaging diagram and/or a secondary thermal imaging diagram.

Preferably, the bottom of the observation device is further provided with a front partition plate and a rear partition plate, the two partition plates are both positioned at the bottom of the side wall cover body, the front partition plate is positioned at the upstream side of the bottom observation hole, and the rear partition plate is positioned at the downstream side of the bottom observation hole.

Preferably, the front and rear diaphragms are movable in relation to each other in the plane of the bottom viewing aperture along the length of the shaker screen in response to a change in the position of the thermal imaging camera in a reciprocating motion about the viewing means in a vertical plane. Preferably, the center of the gap between the front and rear partition plates is aligned with the center of the top observation hole and the thermal imaging camera.

Preferably, the system further comprises a data processing module and a control system. The thermal imager is connected with a data processing module, and the data processing module is connected with a control system. Meanwhile, the gas valve of the gas injection device and/or the cooling water valve of the cooling water spraying device are/is connected with the control system. The control system controls the operation of the data processing module, the thermal imager, the gas valve and the cooling water valve.

As shown in fig. 1, the activated carbon flue gas purification device circulates between the desorption tower and the adsorption tower, all links such as the desorption tower, the adsorption tower, the conveyor, the buffer bin and the like are all air-tight structures, and activated carbon is in a large aggregation state in the above devices, and occasionally appearing high-temperature activated carbon may be surrounded by a group of normal-temperature activated carbon, so that high-temperature activated carbon particles are difficult to detect comprehensively.

In the activated carbon flue gas purification device, activated carbon circulates between an analytic tower and an adsorption tower, and all the activated carbon needs to be screened out of activated carbon powder by a vibrating screen in the circulation. The active carbon powder screening is a subsequent process of a desorption tower (a high-temperature heating link), and active carbon particles are in a rolling and flat-spreading state on a vibrating screen. Therefore, the high-temperature activated carbon particles (or the spontaneous combustion activated carbon) are detected in the activated carbon screening link, and the high-temperature activated carbon particles in the activated carbon flue gas purification process can be found more conveniently.

After the thermal imaging appearance detected high temperature active carbon, relatively safe processing mode mainly includes: 1. discharging the spontaneous combustion activated carbon; the exhausted spontaneous combustion activated carbon often increases the loss of an activated carbon flue gas purification system, and exhausted spontaneous combustion activated carbon particles need further treatment; 2. extinguishing and cooling the activated carbon; after the spontaneous combustion activated carbon particles are extinguished, if the spontaneous combustion activated carbon particles are continuously kept at a high temperature above the ignition point, spontaneous combustion can occur in the presence of air, so that the spontaneous combustion activated carbon particles need to be safely disposed, and then the spontaneous combustion activated carbon particles need to be extinguished and cooled.

In the application, a method for detecting high-temperature activated carbon and cooling a blanking channel is provided. In the method, a thermal imager firstly shoots materials in an imaging area on a vibrating screen in real time to obtain a thermal imaging image; and analyzing and judging whether the material entering the imaging area has a high temperature point or not according to the thermal imaging image. And if the thermal imaging image does not have the high temperature point, the thermal imager continuously monitors the material entering the imaging area on the vibrating screen. When the thermal imaging image is judged to have a high-temperature point, the detected high-temperature material is subjected to air injection and/or water spray cooling treatment through the activated carbon extinguishing cooling device arranged on the blanking channel, so that the high-temperature material is extinguished and cooled.

In the invention, the method for extinguishing fire and reducing temperature by using the active carbon on the vibrating screen mainly comprises three treatment schemes. In a first processing scheme, the activated carbon extinguishing and cooling device is a gas blowing device. The scheme adopts nitrogen and CO ₂ Inert gases and the like can insulate oxygen to extinguish fire, on one hand, the extinguishing gas can insulate oxygen to prevent high temperature and smoldering active carbon from burning to play a role in extinguishing fire, and can bring away part of heat to play a role in cooling; on the other hand, the desorption tower needs a large amount of nitrogen, and a nitrogen gas generating and storing device is arranged nearby, so that the fire extinguishing and cooling system can be directly used; correspondingly, there is CO in the vicinity ₂ Gas-generating and gas-storing apparatus, e.g. CO produced during high-temperature calcination of limestone (or dolomite) ₂ Then the use of CO is also contemplated ₂ Used as a cooling medium to extinguish fire and reduce temperature. According to the invention, the gas injection device is arranged at the position of the active carbon blanking channel, namely the gas injection device is arranged at the position of the on-screen active carbon channel between the vibrating screen and the conveyor, when the thermal imager detects that high-temperature materials exist on the vibrating screen, the gas injection device immediately opens the gas valve to form a fire extinguishing gas atmosphere, and fire extinguishing gas is injected to the corresponding high-temperature materials to extinguish fire and reduce the temperature, so that peripheral materials are prevented from being ignited due to untimely treatment, and the safe and stable operation of the system is ensured. In the present invention, the mass flow rate of the fire extinguishing gas blown by the gas blowing device satisfies the following relation in terms of the heat balance between the activated carbon and the fire extinguishing gas:

in general, the average temperature of the cooled activated carbon particles discharged from the analytical tower is about 120 to 140 ℃, the temperature of the activated carbon is lowered to a temperature lower than a predetermined target temperature T0, and the amount of the fire extinguishing gas is, for example, considered to be a temperature lower than 20 to 50 ℃ of the activated carbon (e.g., Δ T) _ht =30 ℃). Ideally, the fire suppressing gas is heated to an average temperature of all the activated carbon particles, e.g., 125 ℃, during the heat exchange process; if the initial temperature of the extinguishing gas is 25 deg.CAt this time,. DELTA.T _N =125-25=100 ℃. In the formula 1, K _N1 Ratio of fire suppressing gas to active carbon cooling, K _N1 ＜1；K _N2 For the participation of extinguishing gas in the cooling process of activated carbon, K _N2 ＜1；K _N1 And K _N2 The specific value of (A) can be obtained according to working conditions and experience. LL (LL) _ht For the flow of the activated carbon to be quenched and cooled, the current flow of the activated carbon to be cooled is the same as the flow of the discharge device of the desorption tower at a certain moment in the past, namely LL _ht Can be obtained by measuring the flow of the activated carbon in the discharging device of the desorption tower at a certain time in the past. The blowing flow of the fire extinguishing gas calculated according to the formula 1 ensures that the detected high-temperature activated carbon achieves the extinguishing cooling effect and simultaneously controls the use cost of the fire extinguishing gas. In addition, the blowing time t1 of the gas blowing device can be adjusted according to working conditions and experience, for example, the blowing time of the fire extinguishing gas is more than 2 times of the time of the activated carbon particles moving to the gas blowing device from the detection finding position, and therefore the effect of extinguishing and cooling is achieved.

In a second treatment scheme, the activated carbon extinguishing cooling device is a cooling water spraying device. According to the scheme, water is selected as a cooling medium for extinguishing fire and reducing temperature of the active carbon. On one hand, the specific heat ratio of water to nitrogen and CO ₂ When the specific heat capacity of the gas is large, the temperature reduction amplitude of water with the same volume is larger, and the required water quantity is smaller; on the other hand, the water spraying amount is less, water vapor generated after water absorbs heat when meeting the high-temperature activated carbon is less, in the application scene of the invention, spontaneous combustion or high-temperature activated carbon particles are local high-temperature points in all activated carbon particles, the volume and the range of the activated carbon particles at the high-temperature points are very small, the activated carbon particles can be rapidly cooled when meeting water, and the water vapor reaction can not occur between a small amount of water vapor and the activated carbon at a lower temperature. Furthermore, in view of the low cost and ready availability of water, the second treatment option of the present invention employs water as the cooling medium. The cooling water spraying device is arranged at the position of an active carbon channel on the screen between the vibrating screen and the conveyor, when the thermal imager detects that high-temperature materials exist on the vibrating screen, the cooling water spraying device immediately opens the cooling water valve and sprays cooling water to the corresponding high-temperature materialsThe fire is extinguished and the temperature is reduced, thereby avoiding the peripheral materials from being ignited in time due to untimely treatment and ensuring the safe and stable operation of the system. In the present invention, the mass flow rate of the cooling water sprayed by the cooling water spraying device satisfies the following relation in terms of the heat balance between the activated carbon and the cooling water:

in general, the average temperature of the cooled activated carbon particles discharged from the analytical column is about 120 to 140 ℃, the temperature of the activated carbon is similarly lowered to a predetermined target temperature T0 or less, and the amount of cooling water is, for example, considered in terms of lowering the temperature of the activated carbon by 15 to 20 ℃ (for example,. DELTA.T) _ht1 =20 ℃) in order to ensure that the cooling water is completely converted to water vapour during the cooling process, i.e. liquid water is not carried into the chain bucket, when the cooling water is warmed during the heat exchange process to the water evaporation temperature at the local atmospheric pressure, for example 100 ℃. That is, the invention avoids liquid water from entering the conveyor and even the whole flue gas purification device by accurately controlling the water spraying flow of the cooling water spraying device, thereby avoiding the active carbon powder from being adhered to the conveying equipment in the conveying system, and simultaneously avoiding the incompletely resolved SO in the liquid water and the active carbon ₂ Reaction to form H ₂ SO ₄ And corrodes the transport equipment. The invention adopts water which is low in cost and easy to obtain as a medium for cooling the activated carbon, thereby reducing the use cost and avoiding common technical problems which may occur when the water is used as a cooling medium. In addition, the spraying time t2 of the cooling water spraying device can be adjusted according to working conditions and experience, for example, the spraying time of the cooling water is more than 2 times of the time for moving the activated carbon particles from the detection finding position to the cooling water spraying device.

In a third processing scheme, the activated carbon extinguishing cooling device comprises an activated carbon extinguishing device and an activated carbon cooling device. Wherein, the active carbon extinguishing device is a gas blowing device, and the active carbon cooling device is a cooling water spraying device. The invention adopts nitrogen and CO ₂ Inert gas, etc. can be isolatedThe oxygen gas is used as flame-retardant gas, after a thermal imager finds a high-temperature point, the gas injection device injects fire-extinguishing gas for flame retardance, and then water is used as a cooling medium to cool the high-temperature activated carbon. Generally, the burning coal undergoes a water gas reaction when it encounters water. In the application scenario of the present invention, however, the cooling water supply branch of the cooling water spraying device is arranged below the gas supply branch of the gas injection device, i.e. the cooling water spraying holes are arranged in the region below the gas spraying holes. And specifically, in the process of extinguishing and cooling the high-temperature activated carbon, the thermal imager immediately opens the gas valve of the gas spraying device after finding the high-temperature material, the gas spraying device sprays fire extinguishing gas to the spontaneous combustion activated carbon, after the fire extinguishing gas is sprayed for a time period of t3, the cooling water valve of the cooling water spraying device is opened, the cooling water spraying device sprays cooling water (or cooling water mist) to the high-temperature activated carbon, after the cooling water is sprayed for a time period of t4, the cooling water valve is closed, the fire extinguishing gas is sprayed for a time period of t5 from the closing moment of the cooling water valve, and then the gas valve is closed, so that the fire extinguishing and cooling treatment on the high-temperature activated carbon particles is completed. From jetting time, the spraying cooling of cooling water is accomplished at the in-process of the gaseous jetting of putting out a fire, and from jetting position, the spraying of cooling water is gone on under the isolated condition of gaseous putting out a fire, from this, then can ensure that the cooling water sprays and goes on in anaerobic environment, and the volume and the scope of smoldering or high temperature active carbon particle are all very little simultaneously, also can extinguish the cooling rapidly after meeting water, do not form the condition of continuous water gas reaction. In addition, compared to nitrogen and CO ₂ And inert gas and the like, water also has the advantages of low cost and easiness in obtaining, so that the scheme adopts the fire extinguishing gas and the water as the cooling medium of the high-temperature activated carbon together, and is a good choice. The blowing periods t3, t4, t5 mentioned here can be adjusted according to the operating conditions and experience. For example, the time t3 for blowing the fire extinguishing gas is 0.5 to 1s; the cooling water spraying time t4 is more than 2 times of the time for moving the activated carbon particles from the detection finding position to the cooling water spraying device; after the cooling water stops spraying, the duration t5 of continuously spraying the fire extinguishing gas is 0.5-1 s. The time periods t3 and t5 for spraying the fire extinguishing gas before and after spraying the cooling water can ensure that the cooling water is sprayedThe spraying is carried out in an oxygen-free environment, so that the common technical problems which can occur when water is used as a cooling medium are avoided.

In a third process variant, the flow rate V of the extinguishing gas blown by the gas blowing device _N Comprises the following steps:

in the formula: v _N The flow of the fire extinguishing gas injected in the extinguishing treatment process of the activated carbon is m ³ /s；S _T Is the cross-sectional area of the activated carbon channel on the sieve, m ² ；L ₂ The height difference m between the nozzle position of the gas injection device and the nozzle position of the cooling water spraying device; t is t _i0 And (4) the time, s, for the high-temperature material to move from the detected high-temperature point position to the nozzle position of the gas injection device. The flow of the fire extinguishing gas sprayed in the extinguishing process of the activated carbon calculated according to the formula 3 can ensure that smoldering activated carbon particles are isolated from air after reaching an activated carbon blanking channel between the vibrating screen and the conveyor.

According to the heat balance of the active carbon and the cooling water, the mass flow of the cooling water sprayed by the cooling water spraying device can be obtained as follows:

generally, the spontaneous combustion or high temperature activated carbon (about 420 ℃) detected by the thermal imaging system will have a higher temperature after extinguishing by blowing the fire extinguishing gas through the gas blowing device, and in formula 4, for example, the amount of cooling water is considered as the temperature of the activated carbon is decreased by 15 to 20 ℃ (for example, Δ T _ht2 =15 ℃) in order to ensure that the cooling water is completely converted to water vapour during the cooling process, the liquid water being carried out without the chain bucket, the cooling water being heated during the heat exchange process to a water evaporation temperature at the local atmospheric pressure, for example 100 ℃. As can also be seen from the formula 4, the invention avoids the liquid water from being brought into the conveyor or even being brought into the conveyor by accurately controlling the water spraying amount of the cooling water spraying deviceIn the whole flue gas purification device, the active carbon powder is prevented from being adhered to the conveying equipment in the conveying system due to liquid water, and simultaneously, the incompletely resolved SO in the liquid water and the active carbon can be prevented ₂ Reaction to form H ₂ SO ₄ And corrodes the transport equipment. The invention adopts water which is low in cost and easy to obtain as a medium for cooling the activated carbon, reduces the use cost and avoids the technical problem which can occur when the water is used as the cooling medium.

It should be noted that, specifically, in the process of extinguishing and cooling the high-temperature activated carbon, the three schemes all adopt a method of blowing the extinguishing gas and/or spraying the cooling water in advance, the speed of the activated carbon is high in the process of falling in the blanking channel between the vibrating screen and the conveyor, the contact time of the activated carbon with the extinguishing gas and/or the cooling water is short, and the method of blowing the extinguishing gas and/or spraying the cooling water in advance can ensure that the activated carbon has enough time to contact the extinguishing gas and/or the cooling water when passing through the blanking channel, so that the purpose of extinguishing and cooling the high-temperature activated carbon is achieved.

Preferably, the specific high temperature detection process in the method of the present invention is as follows: firstly, shooting a material entering a first detection area on a vibrating screen to obtain a primary thermal imaging graph; analyzing and judging whether the material entering the first detection area has a suspected high-temperature point or not according to the primary thermal imaging graph; tracking and shooting the material with the suspected high-temperature point in the primary thermal imaging graph to obtain a secondary thermal imaging graph of the material at the suspected high-temperature point entering a second detection area; and analyzing and judging whether the suspected high-temperature point is a high-temperature point or not according to the secondary thermal imaging graph. And when the suspected high temperature point is confirmed to be the high temperature point, recording the found position of the material at the high temperature point in the second detection area and giving an alarm.

In the invention, the thermal imaging image (i.e. the primary thermal imaging image or the secondary thermal imaging image) is an infrared image with temperature information, and the temperature information of the material at each point in the imaging area can be read from the thermal imaging image. Comparing the maximum temperature value T1 in the primary thermal imaging map with the target temperature T0, it may be determined whether there is a high temperature point in the primary thermal imaging map. If T1 is less than or equal to T0, judging that the primary thermal imaging graph does not have a high-temperature point, and continuously carrying out high-temperature detection on the subsequent materials entering the first detection area by the thermal imaging instrument. If T1 is larger than T0, judging that the primary thermal imaging image has a suspected high temperature point; the thermal imager further shoots the material at the suspected high-temperature point to obtain a secondary thermal imaging graph of the material in the second detection area. Dividing the secondary thermal imaging image into n areas (for example, into nine-square grids), acquiring a highest temperature value T2 in the n areas, and comparing the T2 with a target temperature T0 to further judge whether the suspected high-temperature point is a high-temperature point. If T2 is less than or equal to T0, the suspected high-temperature point is judged to be a false high-temperature point, and the thermal imager continuously monitors the high temperature of the materials entering the first detection area subsequently. And if T2 is larger than T0, confirming that the suspected high-temperature point is the high-temperature point, and determining the found position of the material at the high-temperature point in the second detection area and giving an alarm to the control system through the area of the highest temperature value T2 corresponding to the secondary thermal imaging graph. In order to further embody the accuracy or precision of the high-temperature detection, the secondary thermal imaging graph can be a plurality of continuously shot pictures, and the temperature information of the material at the suspected high-temperature point in the plurality of continuously shot pictures is compared, so that whether the suspected high-temperature point is a high-temperature point or not is judged more accurately.

In this application, the thermal imaging system sets up in the top of shale shaker apron (thermal imaging system is independent of the shale shaker setting promptly), is equipped with the trompil on the apron of shale shaker, and the thermal imaging system passes through the active carbon that the trompil flowed through on to the shale shaker sieve carries out real-time supervision. Through the arrangement, although the vibrating screen is simple and convenient, the screen plate of the vibrating screen needs to be provided with the openings with larger sizes. The large size of the opening causes the following problems: 1. because the thermal imager needs to be ensured to image, dust removal cannot be arranged right above the opening, and working dust of the vibrating screen overflows to seriously affect the surrounding environment; 2. the active carbon particles jump out of the vibrating screen in the screening process, so that the loss of the active carbon is increased; 3. foreign matters easily enter the flue gas purification device from the holes of the vibrating screen, and the safe and stable operation of the activated carbon flue gas purification device is influenced.

Aiming at the problems, the invention further optimizes and reduces the size of the opening, and the cover plate of the vibrating screen is provided with a slender opening, and the width of the opening is the same as that of the vibrating screen, so that the thermal imaging instrument can detect all the activated carbon flowing through the screen plate of the vibrating screen. Meanwhile, an observation device is arranged at the upper part of the opening of the cover plate of the vibrating screen. The observation device comprises a side wall cover body, wherein observation holes are formed in the upper portion and the bottom of the side wall cover body, namely a top observation hole and a bottom observation hole, the top observation hole is formed in the top end of the side wall cover body, and the bottom observation hole is formed in the bottom end of the side wall cover body. Generally, the bottom observation hole of the observation device is equal in size and coincides with the opening of the vibrating screen cover plate. The observation device can ensure that the optical channel of the thermal imaging instrument for imaging the activated carbon particles on the vibrating screen through the top observation hole and the bottom observation hole is unblocked, the height of the observation device can be determined according to experience or adjusted as required, and the constraint condition of the observation device mainly ensures that the activated carbon particles cannot jump out of the vibrating screen. Meanwhile, the observation device can play a role in eliminating observation obstacles and optimizing imaging environment and imaging background.

According to the invention, the thermal imager reciprocates in a vertical plane around the observation device, so that the material entering the first detection area or the second detection area can be shot in real time through the observation device, a primary thermal imaging graph or a secondary thermal imaging graph is obtained, and the high-temperature detection of the material is more accurately realized. Correspondingly, the observation device also comprises a front partition plate arranged on the upstream side of the bottom observation hole and a rear partition plate arranged on the downstream side of the bottom observation hole. According to the position change that the thermal imaging instrument makes reciprocating motion in a vertical plane around the observation device, the front partition plate and the rear partition plate synchronously move along the length direction of the vibrating screen in the plane where the bottom observation hole is located, namely, the positions of the front partition plate and the rear partition plate in the observation device are adjusted according to the installation position of the thermal imaging instrument. The center of a pore formed among the front clapboard, the rear clapboard and the bottom observation hole, the center of the top observation hole and the thermal imager are positioned on the same straight line. The arrangement of the front partition plate and the rear partition plate can further avoid the problems caused by the large-size observation hole formed in the cover plate of the vibrating screen, reduce the requirement on the dust removal air volume and simultaneously still meet the requirement of a thermal imaging camera on detecting high-temperature activated carbon particles.

Preferably, in the technical solution of the present application, one or more thermal imaging cameras may be provided. In specific implementation, can set up a plurality of thermal imaging cameras, shoot the material that gets into in the formation of image district through controlling a plurality of independent thermal imaging cameras and acquire the thermal imaging image to guarantee not to omit the material among the high temperature testing process, solved the problem that is difficult to detect comprehensively among the prior art. Simultaneously, the thermal imaging system is around viewing device reciprocating motion in vertical plane, and the position of thermal imaging system can move along with the transport of material on the shale shaker promptly, and to the material of suspected high temperature point, the thermal imaging system can further track and judge to make and detect more accurately, also more be favorable to realizing the comprehensiveness that detects.

In the application, the expression "on-screen activated carbon channel" and "blanking channel" are the same meaning and refer to the channel arranged between the on-screen activated carbon outlet of the vibrating screen and the feed inlet of the conveyor.

In the present application, the material refers to activated carbon, and is generally fresh activated carbon after being desorbed by an desorption tower.

In the present application, the terms "upstream" and "downstream" refer to relative concepts in terms of the flow direction of activated carbon particles on a conveying device such as a vibrating screen, that is, a position where activated carbon particles pass first on the conveying device is upstream, and a position where activated carbon particles pass later is downstream.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the thermal imager is adopted to detect the temperature of the activated carbon, the suspected high-temperature point is preliminarily judged, and the suspected high-temperature point is tracked and detected, so that accurate high-temperature point judgment data is obtained, and the detection accuracy is improved.

2. According to the technical scheme provided by the invention, on the basis of identifying the high-temperature activated carbon, the blowing amount of the gas blowing device and/or the water spraying amount of the cooling water spraying device can be accurately controlled, the extinguishing and cooling of the high-temperature activated carbon are realized, the waste is avoided, meanwhile, the liquid water is prevented from being brought into a conveying system, and the safety of the system is improved.

3. In the invention, the position of the thermal imaging instrument can move along with the conveying of the materials on the vibrating screen, which is beneficial to tracking and judging the materials and simultaneously solves the problem that high-temperature activated carbon particles in the activated carbon flue gas purification device are difficult to detect comprehensively.

4. According to the invention, the observation device is arranged between the vibrating screen cover plate and the thermal imager, so that the problem that a large-size observation hole is formed in the vibrating screen cover plate due to detection is avoided, the observation obstacle can be eliminated due to the arrangement of the observation device, the imaging environment and the imaging background are optimized, and meanwhile, the activated carbon particles are ensured not to jump out of the vibrating screen, so that the safe and stable operation of the activated carbon flue gas purification device is ensured.

Drawings

FIG. 1 is a schematic diagram of an activated carbon desulfurization and denitrification apparatus in the prior art;

FIG. 2 is a schematic diagram of a prior art desorption tower;

FIG. 3 is a flow chart of a method for detecting high temperature of activated carbon and cooling at a blanking channel according to the present invention;

FIG. 4 is a schematic diagram of a thermal imager acquiring a primary thermal image of a material in a first detection area according to the present invention;

FIG. 5 is a schematic diagram of a thermal imager acquiring a secondary thermal image of a material in a second detection area according to the present invention;

FIG. 6 is a schematic view of the position and structure of the observation device according to the present invention;

FIG. 7 is a relationship diagram of a thermal imager, a control system, and a data processing module according to the present invention;

fig. 8 is a data processing flow chart of the thermal imager of the present invention;

FIG. 9 is a schematic view of the structure of the vibrating screen, the passage for the activated carbon on the screen, and the conveyor of the present invention;

FIG. 10 is a schematic view of a cooling system at a first high temperature activated carbon detecting and blanking channel according to the present invention;

FIG. 11 is a plan view of a first activated carbon quenching cooling device in accordance with the present invention;

FIG. 12 is a side view of a first activated carbon quenching cooling device according to the present invention;

FIG. 13 is a logic block diagram of a first high temperature activated carbon quench cooling flow in accordance with the present invention;

FIG. 14 is a schematic structural view of a cooling system at a second high temperature activated carbon detecting and blanking channel in the present invention;

FIG. 15 is a plan view of a second activated carbon quenching cooling device in the invention;

FIG. 16 is a side view of a second activated carbon quenching cooling device in accordance with the present invention;

FIG. 17 is a logic block diagram of a second high temperature activated carbon quench cooling flow in accordance with the present invention;

FIG. 18 is a schematic structural view of a cooling system at a third high temperature activated carbon detecting and blanking channel in the present invention;

FIG. 19 is a plan view of a third activated carbon quenching cooling device in accordance with the present invention;

FIG. 20 is a side view of a third activated carbon quenching cooling device in accordance with the present invention;

FIG. 21 is a logic block diagram of a third high temperature activated carbon quenching cooling process in accordance with the present invention;

reference numerals:

1: a thermal imager; 2: vibrating screen; 201: a cover plate; 3: an imaging area; 301: a first detection zone; 302: a second detection zone; 4: an observation device; 401: a sidewall mask body; 402: a top viewing aperture; 403: a bottom viewing aperture; 404: a front bulkhead; 405: a rear bulkhead; 5: a gas injection device; 501: a gas delivery main pipe; 502: a gas delivery manifold; 503: a gas valve; 504: a gas nozzle; 6: a cooling water spray device; 601: a cooling water delivery main pipe; 602: cooling water delivery branch pipes; 603: a cooling water valve; 604: a cooling water nozzle; 7: an active carbon channel is arranged on the sieve; 8: a conveyor; a1: a data processing module; a2: and (4) controlling the system.

Detailed Description

According to the embodiment of the invention, a system for detecting high-temperature activated carbon and cooling at a blanking channel is provided.

A system for detecting high-temperature activated carbon and cooling a blanking channel comprises a thermal imager 1, a vibrating screen 2, an activated carbon extinguishing cooling device, an on-screen activated carbon channel 7 and a conveyor 8. And an oversize activated carbon outlet of the vibrating screen 2 is connected with a feed inlet of a conveyor 8 through an oversize activated carbon channel 7. The vibrating screen 2 is provided with a cover plate 201. The thermal imaging camera 1 is disposed above the cover plate 201 of the vibrating screen 2. An imaging zone 3 is provided on the shaker 2. The imaging zone 3 comprises a first detection area 301 and a second detection area 302. On the vibrating screen 2, a first detection zone 301 is located upstream of a second detection zone 302. The activated carbon extinguishing and cooling device is arranged on the activated carbon channel 7 on the screen.

In the invention, the activated carbon extinguishing and cooling device is a gas blowing device 5. The gas blowing device 5 includes a main gas supply pipe 501, a branch gas supply pipe 502, and a gas nozzle 504. The gas delivery main pipe 501 is provided outside the on-screen activated carbon passage 7. The gas delivery manifold 502 is disposed on the oversize activated carbon passage 7. One end of the gas delivery branch pipe 502 is connected with the gas delivery main pipe 501, and the other end extends into the oversize activated carbon passage 7. The gas delivery manifold 502 terminates in a gas nozzle 504. Preferably, the gas delivery main pipe 501 is provided with a gas valve 503, and the gas valve 503 controls the opening and closing of the gas blowing device 5.

Preferably, the number of gas delivery branches 502 is a plurality, preferably 2-30, more preferably 3-16. Each gas delivery branch pipe 502 is connected to the gas delivery main pipe 501, and a plurality of gas delivery branch pipes 502 are uniformly distributed along the periphery of the oversize activated carbon passage 7. Preferably, the gas nozzles 504 are located on the underside of the distal end of the gas delivery manifold 502. Or

In the invention, the activated carbon extinguishing and cooling device is a cooling water spraying device 6. The cooling water spray device 6 includes a cooling water delivery main pipe 601, a cooling water delivery branch pipe 602, and a cooling water nozzle 604. The cooling water delivery main pipe 601 is provided outside the on-screen activated carbon passage 7. The cooling water delivery branch pipe 602 is provided on the oversize activated carbon passage 7. One end of the cooling water delivery branch pipe 602 is connected with the cooling water delivery main pipe 601, and the other end extends into the on-screen activated carbon channel 7. The end of the cooling water delivery branch pipe 602 is provided with a cooling water nozzle 604. Preferably, the cooling water delivery main pipe 601 is provided with a cooling water valve 603, and the cooling water valve 603 controls the cooling water spraying device 6 to be opened and closed.

Preferably, the number of the cooling water delivery branch pipes 602 is plural, preferably 2 to 30, and more preferably 3 to 16. Each cooling water delivery branch pipe 602 is connected to the cooling water delivery main pipe 601, and a plurality of cooling water delivery branch pipes 602 are uniformly distributed along the periphery of the oversize activated carbon passage 7. Preferably, the cooling water nozzles 604 are located at the lower side of the distal end of the cooling water delivery manifold 602.

In the invention, the activated carbon extinguishing cooling device comprises an activated carbon extinguishing device and an activated carbon cooling device. Wherein, the active carbon extinguishing device is a gas blowing device 5 arranged on an active carbon channel 7 on the screen. The active carbon cooling device is a cooling water spraying device 6 arranged on the active carbon channel 7 on the screen.

Preferably, the cooling water delivery branch pipe 602 of the cooling water sprinkler 6 is disposed below the gas delivery branch pipe 502 of the gas blowing device 5.

Preferably, the system further comprises a viewing device 4, the viewing device 4 being arranged on the upper part of the cover plate 201 of the vibrating screen 2, between the cover plate 201 of the vibrating screen 2 and the thermal imaging camera 1. The viewing device 4 comprises a sidewall shell 401, a top viewing aperture 402 and a bottom viewing aperture 403. The top observation hole 402 is defined as the area surrounded by the top edges of the side wall shells 401. The bottom viewing aperture 403 is defined by the bottom edge of the sidewall shroud 401. Preferably, an opening is formed in the cover plate 201 of the vibrating screen 2, and the bottom observation hole 403 of the observation device 4 is equal in size and coincident in position with the opening in the cover plate 201. Preferably, the width of the openings is equal or substantially equal to the width of the vibrating screen 2.

The thermal imaging system 1 surrounds the observation device 4 is reciprocating motion in the vertical plane, and the thermal imaging system 1 shoots the material entering the vibrating screen 2 in the first detection area 301 and the second detection area 302 in real time through the observation device 4 to obtain a primary thermal imaging image and a secondary thermal imaging image.

Preferably, the bottom of the observation device 4 is further provided with a front partition 404 and a rear partition 405, both of which are located at the bottom of the sidewall housing 401, the front partition 404 is located at the upstream side of the bottom observation hole 403, and the rear partition 405 is located at the downstream side of the bottom observation hole 403.

Preferably, the front and

rear baffles

404 and 405 are correspondingly moved in the plane of the bottom viewing aperture 403 along the length of the shaker 2 in response to changes in the position of the thermal imaging camera 1 reciprocating in a vertical plane about the viewing means 4. Preferably, the center of the gap between the front partition 404 and the rear partition 405 is aligned with the center of the top observation hole 402 and the thermal imaging camera 1.

Preferably, the system further comprises a data processing module A1 and a control system A2. The thermal imager 1 is connected with a data processing module A1, and the data processing module A1 is connected with a control system A2. Meanwhile, the gas valve 503 of the gas blowing device 5 and the cooling water valve 603 of the cooling water spraying device 6 are connected to the control system A2. The control system A2 controls the operations of the data processing module A1, the thermal imager 1, the gas valve 503, and the cooling water valve 603.

Example 1

As shown in fig. 4-5 and fig. 9-10, a system for detecting high-temperature activated carbon and cooling at a blanking channel comprises a thermal imaging camera 1, a vibrating screen 2, an activated carbon extinguishing cooling device, an on-screen activated carbon channel 7 and a conveyor 8. And an oversize activated carbon outlet of the vibrating screen 2 is connected with a feed inlet of a conveyor 8 through an oversize activated carbon channel 7. A cover plate 201 is arranged on the vibrating screen 2. The thermal imaging camera 1 is disposed above the cover plate 201 of the vibrating screen 2. An imaging area 3 is arranged on the vibrating screen 2. The imaging zone 3 includes a first detection zone 301 and a second detection zone 302. On the vibrating screen 2, the first detection zone 301 is located upstream of the second detection zone 302. The activated carbon extinguishing cooling device is arranged on the activated carbon channel 7 on the screen.

Example 2

As shown in fig. 11 to 12, example 1 was repeated except that the activated carbon extinction cooling device was a gas blowing device 5. The gas blowing device 5 includes a gas supply main pipe 501, gas supply branch pipes 502, and gas nozzles 504. The gas delivery main pipe 501 is provided outside the on-screen activated carbon passage 7. The gas delivery manifold 502 is provided on the oversize activated carbon passage 7. One end of the gas delivery branch pipe 502 is connected with the gas delivery main pipe 501, and the other end extends into the oversize activated carbon passage 7. The gas delivery manifold 502 terminates in a gas nozzle 504. The gas delivery main pipe 501 is provided with a gas valve 503, and the gas valve 503 controls the opening and closing of the gas blowing device 5.

The number of gas delivery manifolds 502 is 16. Each gas delivery branch pipe 502 is connected to the gas delivery main pipe 501, and 16 gas delivery branch pipes 502 are uniformly distributed along the periphery of the oversize activated carbon passage 7. The gas nozzles 504 are located on the underside of the distal end of the gas delivery manifold 502.

Example 3

Embodiment 2 is repeated as shown in fig. 6, except that the system further comprises a viewing device 4, the viewing device 4 being arranged on top of the cover plate 201 of the vibrating screen 2, between the cover plate 201 of the vibrating screen 2 and the thermal imaging camera 1. The viewing device 4 comprises a sidewall shell 401, a top viewing aperture 402 and a bottom viewing aperture 403. The top observation hole 402 is defined as the area surrounded by the top edges of the side wall shells 401. The bottom viewing aperture 403 is defined by the bottom edge of the sidewall shell 401. The cover plate 201 of the vibrating screen 2 is provided with an opening, and the bottom observation hole 403 of the observation device 4 is equal to the opening of the cover plate 201 in size and is coincident in position. The width of the opening is equal to the width of the vibrating screen 2.

Example 4

Example 3 was repeated except that the bottom of the observation device 4 was further provided with a front partition 404 and a rear partition 405, both of which are located at the bottom of the sidewall housing 401, the front partition 404 being located at the upstream side of the bottom observation hole 403, and the rear partition 405 being located at the downstream side of the bottom observation hole 403.

According to the position change of the thermal imaging camera 1 reciprocating in the vertical plane around the observation device 4, the front partition 404 and the rear partition 405 correspondingly move along the length direction of the vibrating screen 2 in the plane of the bottom observation hole 403. The center of the gap between the front baffle 404 and the rear baffle 405 is aligned with the center of the top observation hole 402 and the thermal imaging camera 1.

Example 5

As shown in fig. 7, embodiment 4 is repeated except that the system further includes a data processing module A1 and a control system A2. The thermal imager 1 is connected with a data processing module A1, and the data processing module A1 is connected with a control system A2. Meanwhile, the gas valve 503 of the gas blowing device 5 is connected to the control system A2. The control system A2 controls the operation of the data processing module A1, the thermal imager 1, and the gas valve 503.

Example 6

As shown in FIGS. 14 to 16, example 5 was repeated except that the activated carbon extinction cooling device was replaced with a cooling water spraying device 6 by the gas blowing device 5. The cooling water spray device 6 includes a cooling water delivery main pipe 601, a cooling water delivery branch pipe 602, and a cooling water nozzle 604. The cooling water delivery main pipe 601 is provided outside the oversize activated carbon passage 7. The cooling water delivery branch pipe 602 is provided on the on-screen activated carbon passage 7. One end of the cooling water delivery branch pipe 602 is connected with the cooling water delivery main pipe 601, and the other end extends into the on-screen activated carbon channel 7. The cooling water delivery branch pipe 602 is provided at its end with a cooling water nozzle 604. A cooling water valve 603 is provided on the cooling water delivery main pipe 601, and the cooling water valve 603 controls the cooling water spraying device 6 to be opened and closed.

The number of the cooling water delivery branch pipes 602 is 16. Each cooling water delivery branch pipe 602 is connected to the cooling water delivery main pipe 601, and 16 cooling water delivery branch pipes 602 are uniformly distributed along the periphery of the oversize activated carbon passage 7. The cooling water nozzles 604 are located at the lower side of the distal ends of the cooling water delivery branch pipes 602.

The cooling water valve 603 of the cooling water spraying device 6 is connected to the control system A2. The control system A2 controls the operations of the data processing module A1, the thermal imager 1, and the cooling water valve 603.

Example 7

Example 5 was repeated except that the activated carbon extinction cooling device included an activated carbon extinction device and an activated carbon cooling device, as shown in fig. 18 to 20. Wherein the activated carbon extinguishing device is a gas blowing device 5 arranged on an active carbon channel 7 on the screen. The active carbon cooling device is a cooling water spraying device 6 arranged on the active carbon channel 7 on the screen.

The cooling water spray device 6 includes a cooling water delivery main pipe 601, a cooling water delivery branch pipe 602, and a cooling water nozzle 604. The cooling water delivery main pipe 601 is provided outside the on-screen activated carbon passage 7. The cooling water delivery branch pipe 602 is provided on the on-screen activated carbon passage 7. One end of the cooling water delivery branch pipe 602 is connected to the cooling water delivery main pipe 601, and the other end extends into the oversize activated carbon passage 7. The end of the cooling water delivery branch pipe 602 is provided with a cooling water nozzle 604. The cooling water delivery main pipe 601 is provided with a cooling water valve 603, and the cooling water valve 603 controls the cooling water spraying device 6 to be opened and closed.

The cooling water delivery branch pipe 602 of the cooling water sprinkler 6 is disposed below the gas delivery branch pipe 502 of the gas blowing device 5.

The gas valve 503 of the gas blowing device 5 and the cooling water valve 603 of the cooling water spraying device 6 are both connected with the control system A2. The control system A2 controls the operation of the data processing module A1, the thermal imager 1, the gas valve 503, and the cooling water valve 603.

Example 8

As shown in fig. 3, a method for detecting high-temperature activated carbon and cooling a blanking channel comprises the following steps:

1) The material enters the vibrating screen 2, and the thermal imaging instrument 1 shoots the material entering the first detection area 301 on the vibrating screen 2 in real time to obtain a primary thermal imaging graph;

2) Whether the material entering the first detection area 301 has a high temperature point is judged according to the primary thermal imaging image analysis;

2b) If the primary thermal imaging image is judged to have the suspected high-temperature point, performing step 3);

3) The thermal imaging instrument 1 tracks and shoots a secondary thermal imaging graph of the material at the suspected high-temperature point entering a second detection area 302 on the vibrating screen 2, and further judges whether the suspected high-temperature point is a high-temperature point;

3b) If the suspected high-temperature point is determined as the high-temperature point, recording the found position of the material at the high-temperature point in the second detection area 302 on the vibrating screen 2 and giving an alarm;

4) The activated carbon extinguishing and cooling device arranged at the position of the activated carbon channel 7 on the screen between the vibrating screen 2 and the conveyor 8 is used for extinguishing and cooling the detected high-temperature material.

Wherein the first detection zone 301 is located upstream of the second detection zone 302 on the vibrating screen 2.

Example 9

As shown in fig. 13, example 8 was repeated except that in step 4), the activated carbon extinction cooling device was the gas blowing device 5. The fire extinguishing and cooling treatment comprises the following steps: the gas blowing device 5 arranged on the active carbon channel 7 on the screen blows the fire extinguishing gas to the detected high-temperature material, thereby realizing the extinguishing and cooling of the high-temperature material.

In the fire extinguishing and temperature reducing treatment, the mass flow of the fire extinguishing gas sprayed by the gas spraying device 5 satisfies the following relational expression:

wherein: LL (LL) _N The flow of the fire extinguishing gas which is blown in the quenching and cooling treatment process of the active carbon is kg/s. C _ht The specific heat capacity of the activated carbon is kJ/(kg-DEG C). LL (LL) _ht The flow rate of the activated carbon to be quenched and cooled is kg/s. Theta T _ht The temperature is controlled to be lower than the target temperature of the active carbon in the extinguishing and cooling process by adopting the extinguishing gas. Theta T of _N The temperature of the fire extinguishing gas is increased after the fire extinguishing gas is extinguished and cooled. C _N The specific heat capacity of the fire extinguishing gas is kJ/(kg DEG C). K _N1 To take part in activity of fire extinguishing gasRatio of carbon Cooling, K _N1 ＝0.95。K _N2 For the participation of extinguishing gas in the cooling process of activated carbon, K _N2 ＝0.95。

Example 10

Example 9 is repeated except that the cover plate 201 is provided on the vibrating screen 2 and the material entering the vibrating screen 2 moves along the length direction of the vibrating screen 2.

In step 1), the thermal imager 1 shoots the material entering the first detection area 301 in real time to obtain a primary thermal imaging diagram, which specifically comprises:

1a) Be equipped with the trompil on the apron 201 of shale shaker 2, viewing device 4 sets up in the trompil top and covers the trompil, and thermal imaging system 1 sets up in the top of apron 201, and viewing device 4 is located between apron 201 and thermal imaging system 1.

1b) The thermal imaging system 1 shoots the material entering the vibrating screen 2 in the first detection area 301 in real time through the observation device 4 and the opening hole to obtain a thermal imaging diagram.

Example 11

The embodiment 10 is repeated, except that in step 2), whether the material entering the first detection area 301 has a high temperature point is determined according to the thermal imaging image analysis, specifically:

acquiring a highest temperature value T1 in the primary thermal imaging image according to the primary thermal imaging image, and comparing the highest temperature value T1 with a set target temperature T0; if T1 is less than or equal to T0, judging that the primary thermal imaging image does not have a high temperature point, and repeating the step 1); if T1 is larger than T0, judging that the primary thermal imaging image has a suspected high-temperature point; preferably, T0 is 420 ℃.

In step 3), the thermal imaging instrument 1 tracks and shoots a secondary thermal imaging graph in which the material at the suspected high-temperature point enters the second detection area 302, specifically:

the thermal imaging system 1 reciprocates in a vertical plane around the observation device 4, and the thermal imaging system 1 detects the material entering a suspected high-temperature point in the second detection area 302 on the vibrating screen 2 through the observation device 4 to obtain a secondary thermal imaging graph.

As shown in fig. 8, in step 3), determining whether the suspected high temperature point is a high temperature point according to the secondary thermal imaging map, specifically:

dividing the secondary imaging graph into 9 areas, obtaining the highest temperature of each of the 9 areas, selecting the highest temperature value T2 of the 9 highest temperatures, and comparing the highest temperature value T2 with a set target temperature T0. And if T2 is less than or equal to T0, judging the suspected high-temperature point as a false high-temperature point. And if T2 is larger than T0, confirming that the suspected high temperature point is the high temperature point. And determining the found position of the material at the high temperature point in the second detection area 302 on the vibrating screen 2 and giving an alarm through the area of the highest temperature value T2 corresponding to the secondary thermal imaging graph.

Example 12

As shown in FIG. 17, example 11 was repeated except that the activated carbon extinction cooling device was replaced with a cooling water spraying device 6 by the gas blowing device 5. The fire extinguishing and cooling treatment comprises the following steps: spray the cooling water to the high temperature material that detects through setting up cooling water sprinkler 6 on the active carbon passageway 7 on the sieve to the realization is to extinguishing and cooling of high temperature material.

In the fire extinguishing and temperature reducing treatment in the step 4), the mass flow of the cooling water sprayed by the cooling water spraying device 6 satisfies the following relational expression:

wherein: LL (LL) _H1 The flow of cooling water sprayed out in the extinguishing and cooling process of the active carbon is kg/s. C _ht The specific heat capacity of the activated carbon is kJ/(kg-DEG C). LL (LL) _ht The flow rate of the activated carbon to be quenched and cooled is kg/s. Theta T _htl The temperature is controlled to the target temperature for quenching the active carbon in the cooling process by adopting cooling water. C _H1 The specific heat capacity of water at the evaporation temperature, kJ/(kg. DEG C.). T is a unit of _e1 The evaporation temperature of water, DEG C. T is _e2 The initial temperature of the cooling water is DEG C. C _H2 The specific heat capacity of water at the initial temperature, kJ/(kg. DEG C.). h is a total of _hz Is the latent heat of vaporization of water at the evaporation temperature, kJ/kg.

Example 13

As shown in fig. 21, example 11 was repeated except that in step 4), the activated carbon extinction cooling means included activated carbon extinction means and activated carbon cooling means. Wherein the activated carbon extinguishing device is the gas blowing device 5. The active carbon cooling device is a cooling water spraying device 6. The fire extinguishing and cooling treatment comprises the following steps: the extinguishing treatment of the high-temperature materials is completed by blowing the fire extinguishing gas to the detected high-temperature materials through the gas blowing device 5 arranged on the active carbon passage 7 on the screen. And the cooling water spraying device 6 arranged on the active carbon channel 7 on the screen sprays cooling water to the detected high-temperature materials, so that the cooling treatment of the high-temperature materials is completed.

In the fire extinguishing and temperature reducing treatment in the step 4), the gas spraying device 5 sprays fire extinguishing gas to the detected high-temperature materials, and meanwhile, the cooling water spraying device 6 sprays cooling water to the detected high-temperature materials. Wherein the flow V of the fire extinguishing gas blown by the gas blowing device 5 _N Comprises the following steps:

in the formula: v _N The flow of the extinguishing gas, m, blown during the extinguishing treatment of the activated carbon ³ /s。S _T Is the cross-sectional area of the activated carbon channel on the sieve, m ² 。L ₂ Is the height difference m between the nozzle position of the gas injection device and the nozzle position of the cooling water spraying device. t is t _i0 And (4) the time s for the high-temperature material to move from the detected high-temperature point position to the nozzle position of the gas blowing device.

Water spray quantity LL of cooling water spray device 6 _H2 The following formula is satisfied:

in the formula: LL (LL) _H2 The flow rate of cooling water sprayed in the cooling treatment process of the active carbon is kg/s. C _ht The specific heat capacity of the activated carbon is kJ/(kg-DEG C). LL (LL) _ht For activities to be cooledFlow rate of charcoal, kg/s. Theta T of _ht2 Is the target of active carbon temperature reduction. C _H1 The specific heat capacity of water at the evaporation temperature, kJ/(kg. DEG C.). T is a unit of _e1 The evaporation temperature of water, DEG C. T is _e2 Is the initial temperature of the cooling water, DEG C. C _H2 The specific heat capacity of water at the initial temperature, kJ/(kg. DEG.C.). h is a total of _hz Is the latent heat of vaporization of water at the evaporation temperature, kJ/kg.

Application example 1

A method for detecting high-temperature activated carbon and cooling at a blanking channel uses the system in embodiment 5, and comprises the following steps:

1) The material gets into shale shaker 2, and thermal imaging system 1 shoots in real time the material that gets into first detection zone 301 on shale shaker 2, obtains once thermal imaging graph.

2) According to the primary thermal imaging graph analysis, the highest material temperature T1=412 ℃ in the first detection area 301 is obtained, T1 is compared with a set target temperature T0, the value of T0 is 410 ℃, and suspected high temperature points are judged in the primary thermal imaging graph because T1 is larger than T0.

3) The thermal imaging instrument 1 tracks and shoots a secondary thermal imaging graph of the material at the suspected high-temperature point entering the second detection area 302 on the vibrating screen 2, and further judges whether the suspected high-temperature point is a high-temperature point.

Dividing the secondary thermal imaging graph into 9 areas, obtaining the highest temperature of each of the 9 areas, selecting the highest temperature value T2=412 ℃ of the 9 highest temperatures, and comparing the highest temperature value T2 with the set target temperature T0=410 ℃. And T2 is more than T0, and the suspected high temperature point is confirmed to be the high temperature point. And determining the found position of the material at the high temperature point in the second detection area 302 on the vibrating screen 2 and giving an alarm through the area of the maximum temperature value T2 corresponding to the secondary thermal imaging graph.

After the found position of the material at the high-temperature point in the second detection area 302 on the vibrating screen 2 is detected and determined, the gas blowing device 5 blows fire extinguishing gas, the time length t1 for blowing the fire extinguishing gas is more than 2 times of the time for moving the activated carbon particles from the detected found position to the gas blowing device 5, and t1 is 35s. The fire extinguishing gas is nitrogen. The mass flow of the fire extinguishing gas blown by the gas blowing device 5 satisfies the following relational expression:

wherein: LL (LL) _N The flow of the fire extinguishing gas which is blown in the quenching and cooling treatment process of the active carbon is kg/s. C _ht Is the specific heat capacity of the activated carbon, C _ht ＝0.84kJ/(kg·℃)。LL _ht For the flow of the cooled activated carbon to be extinguished, LL _ht ＝5kg/s。ΔT _ht Theta T as the target of temperature reduction by activated carbon in the process of quenching and cooling by fire extinguishing gas _ht ＝20℃。θT _N To increase the temperature of the extinguishing gas after the temperature of the extinguishing gas is lowered _N ＝20℃。C _N Specific heat capacity of extinguishing gas, C _N ＝1.3kJ/(kg·℃)。K _N1 Ratio of fire suppressing gas to active carbon cooling, K _N1 ＝0.95。K _N2 Participation of the extinguishing gas in the cooling process of the activated carbon, K _N2 ＝0.95。

Application example 2

A method for detecting high-temperature activated carbon and cooling at a blanking channel by using the system in embodiment 6 comprises the following steps:

1) The material gets into shale shaker 2, and thermal imaging system 1 shoots in real time the material that gets into first detection zone 301 on the shale shaker 2, obtains a thermal imaging graph.

2) And analyzing according to the primary thermal imaging graph to obtain the highest material temperature T1=418 ℃ in the first detection area 301, comparing the T1 with a set target temperature T0, wherein the value of T0 is 410 ℃, and judging that the primary thermal imaging graph has a suspected high temperature point because T1 is greater than T0.

Dividing the secondary thermal imaging graph into 9 areas, obtaining the highest temperature of each of the 9 areas, selecting the highest temperature value T2=419 ℃ of the 9 highest temperatures, and comparing the highest temperature value T2 with the set target temperature T0=410 ℃. And T2 is more than T0, and the suspected high temperature point is confirmed to be the high temperature point. And determining the found position of the material at the high temperature point in the second detection area 302 on the vibrating screen 2 and giving an alarm through the area of the highest temperature value T2 corresponding to the secondary thermal imaging graph.

After the found position of the material at the high-temperature point in the second detection area 302 on the vibrating screen 2 is detected and determined, the cooling water is sprayed by the cooling water spraying device 6, the time length t2 for spraying the cooling water is more than 2 times of the time for moving the activated carbon particles from the detected found position to the cooling water spraying device 6, and t2 is 28s. The mass flow of the cooling water sprayed by the cooling water spraying device 6 satisfies the following relational expression:

wherein: LL (LL) _H1 The flow of cooling water sprayed in the quenching and cooling process of the active carbon is kg/s. C _ht Is the specific heat capacity of activated carbon, C _ht ＝0.84kJ/(kg·℃)。LL _ht Flow of cooled activated carbon to be quenched, LL _ht ＝5kg/s。θT _ht1 In order to quench the active carbon cooling target in the cooling process by using cooling water, theta T _ht1 ＝80℃。C _H1 Is the specific heat capacity of water at the evaporation temperature, C _H1 ＝4.22kJ/(kg·℃)。T _e1 Is the evaporation temperature of water, T _e1 ＝100℃。T _e2 Is the initial temperature of the cooling water, T _e2 ＝25℃。C _H2 Is the specific heat capacity of water at the initial temperature, C _H2 ＝4.177kJ/(kg·℃)。h _hz The latent heat of vaporization of water at the evaporation temperature, h _hz ＝2257.1kJ/kg。

Application example 3

A method for detecting high-temperature activated carbon and cooling at a blanking channel by using the system in embodiment 7 comprises the following steps:

2) And analyzing according to the primary thermal imaging graph to obtain the highest material temperature T1=426 ℃ in the first detection area 301, comparing the T1 with a set target temperature T0, wherein the value of T0 is 410 ℃, and judging that the primary thermal imaging graph has a suspected high temperature point because T1 is greater than T0.

3) The thermal imager 1 tracks and shoots the secondary thermal image that the material at the suspected high-temperature point enters the second detection area 302 on the vibrating screen 2, and further determines whether the suspected high-temperature point is a high-temperature point.

Dividing the secondary thermal imaging graph into 9 areas, obtaining the highest temperature of each of the 9 areas, selecting the highest temperature value T2=427 ℃ of the 9 highest temperatures, and comparing the highest temperature value T2 with the set target temperature T0=410 ℃. And T2 is more than T0, and the suspected high temperature point is confirmed to be the high temperature point. And determining the found position of the material at the high temperature point in the second detection area 302 on the vibrating screen 2 and giving an alarm through the area of the highest temperature value T2 corresponding to the secondary thermal imaging graph.

After the found position of the material at the high-temperature point in the second detection area 302 on the vibrating screen 2 is detected and determined, the gas blowing device 5 blows fire extinguishing gas, the cooling water spraying device 6 sprays cooling water after the time delay t3=0.5s, and the cooling water spraying time t4=22s (which is more than 2 times of the time for moving the activated carbon particles from the detected found position to the gas blowing device 5). And after the cooling water stops spraying, the fire extinguishing gas continues to be sprayed for a time t5=1s. The fire extinguishing gas is nitrogen. Wherein the flow rate of the fire extinguishing gas blown by the gas blowing device 5 is

In the formula: v _N The flow of the fire extinguishing gas, m, blown in the process of extinguishing the activated carbon ³ And s. ST is the cross-sectional area of the passage of the activated carbon on the sieve, S _T ＝0.16m ² 。L ₂ Is the height difference, L, between the nozzle position of the gas injection device and the nozzle position of the cooling water spray device ₂ ＝0.4m。t _i0 Is highTime for the warm material to move from the detected high temperature point position to the nozzle position of the gas injection device, t _i0 ＝10s。

in the formula: LL (LL) _H2 Is the flow of cooling water sprayed out in the cooling treatment process of the active carbon, and is kg/s. C _ht Is the specific heat capacity of activated carbon, C _ht ＝0.84kJ/(kg·℃)。LL _ht For the flow of activated carbon to be cooled, LL _ht ＝5kg/s。θT _ht2 Theta T as a target for cooling the activated carbon _ht2 ＝40℃。C _H1 Is the specific heat capacity of water at the evaporation temperature, C _H1 ＝4.22kJ/(kg·℃)。T _e1 Is the evaporation temperature of water, T _e1 ＝100℃。T _e2 Is the initial temperature, T, of the cooling water _e2 ＝25℃。C _H2 Specific heat capacity of water at initial temperature, C _H2 ＝4.177kJ/(kg·℃)。h _hz The latent heat of vaporization of water at the evaporation temperature, h _hz ＝2257.1kJ/kg。

Application example 4

2) According to the primary thermal imaging graph analysis, the highest material temperature T1=147 ℃ in the first detection area 301 is obtained, T1 is compared with a set target temperature T0, the value of T0 is 410 ℃, and T1 is smaller than T0, so that the primary thermal imaging graph is judged not to have a high temperature point. The thermal imaging system 1 continuously monitors the high temperature of the material subsequently entering the first detection area 301.

Claims

1. A method for detecting high-temperature activated carbon and cooling a blanking channel comprises the following steps:

1) The method comprises the following steps that materials enter a vibrating screen (2), a thermal imaging instrument (1) shoots the materials entering a first detection area (301) on the vibrating screen (2) in real time to obtain a primary thermal imaging graph;

2) Whether the material entering the first detection area (301) has a high temperature point or not is judged according to the primary thermal imaging image analysis;

3) A thermal imaging instrument (1) tracks and shoots a secondary thermal imaging graph of the material at the suspected high-temperature point entering a second detection area (302) on the vibrating screen (2), and further judges whether the suspected high-temperature point is a high-temperature point;

3b) If the suspected high-temperature point is determined as the high-temperature point, recording the found position of the material at the high-temperature point in a second detection area (302) on the vibrating screen (2) and giving an alarm;

4) The detected high-temperature materials are subjected to fire extinguishing and cooling treatment through an activated carbon extinguishing cooling device arranged at an activated carbon channel (7) on the screen between the vibrating screen (2) and the conveyor (8);

wherein, on said vibrating screen (2), a first detection zone (301) is located upstream of a second detection zone (302);

the activated carbon extinguishing and cooling device is a gas blowing device (5); the fire extinguishing and cooling treatment comprises the following steps: the gas blowing device (5) arranged on the active carbon channel (7) on the screen is used for blowing fire extinguishing gas to the detected high-temperature material, so that the high-temperature material is extinguished and cooled;

in the fire extinguishing and temperature reducing treatment in the step 4), the mass flow of the fire extinguishing gas sprayed by the gas spraying device (5) satisfies the following relational expression:

wherein: LL (LL) _N The flow of the fire extinguishing gas blown in the process of extinguishing and cooling the active carbon is kg/s; c _ht The specific heat capacity of the activated carbon is kJ/(kg DEG C); LL (LL) _ht The flow rate of the activated carbon to be quenched and cooled is kg/s; delta T _ht In order to adopt the fire extinguishing gas to extinguish the cooling target of active carbon, the temperature is controlled; delta T _N The temperature of the fire extinguishing gas is increased after the fire extinguishing gas is extinguished and cooled; c _N kJ/(kg. DEG C) which is the specific heat capacity of the extinguishing gas; k _N1 Ratio of fire suppressing gas to active carbon cooling, K _N1 ＜1；K _N2 For the participation of extinguishing gas in the cooling process of activated carbon, K _N2 ＜1。

2. The method of claim 1, wherein: a cover plate (201) is arranged on the vibrating screen (2), and materials entering the vibrating screen (2) move along the length direction of the vibrating screen (2);

in the step 1), the thermal imager (1) shoots the material entering the first detection area (301) in real time to obtain a primary thermal imaging diagram, which specifically comprises the following steps:

1a) A cover plate (201) of the vibrating screen (2) is provided with an opening, the observation device (4) is arranged above the opening and covers the opening, the thermal imager (1) is arranged above the cover plate (201), and the observation device (4) is positioned between the cover plate (201) and the thermal imager (1);

1b) The thermal imaging instrument (1) shoots materials entering a first detection area (301) on the vibrating screen (2) in real time through the observation device (4) and the opening to obtain a primary thermal imaging image; and/or

In the step 3), the thermal imaging instrument (1) tracks and shoots a secondary thermal imaging graph of the material at the suspected high-temperature point entering the second detection area (302), and specifically comprises the following steps:

the thermal imaging system (1) reciprocates in a vertical plane around the observation device (4), and the thermal imaging system (1) detects materials entering a suspected high-temperature point in a second detection area (302) on the vibrating screen (2) through the observation device (4) to obtain a secondary thermal imaging graph.

3. The method of claim 2, wherein: in the step 2), whether the material entering the first detection area (301) has a high temperature point is judged according to the thermal imaging image analysis, and the method specifically comprises the following steps:

acquiring a highest temperature value T1 in the primary thermal imaging image according to the primary thermal imaging image, and comparing the highest temperature value T1 with a set target temperature T0; if T1 is not more than T0, judging that the primary thermal imaging image does not have a high temperature point, and repeating the step 1); if T1 is larger than T0, judging that the primary thermal imaging image has suspected high-temperature points;

in step 3), judging whether the suspected high temperature point is a high temperature point according to the secondary thermal imaging map, specifically:

dividing the secondary thermal imaging graph into n areas, obtaining the highest temperature of each of the n areas, selecting the highest temperature value T2 of the n highest temperatures, and comparing the highest temperature value T2 with a set target temperature T0; if T2 is less than or equal to T0, judging the suspected high-temperature point as a false high-temperature point; if T2 is larger than T0, confirming that the suspected high temperature point is a high temperature point; and determining the found position of the material at the high temperature point in a second detection area (302) on the vibrating screen (2) and alarming through the area of the highest temperature value T2 corresponding to the secondary thermal imaging graph.

4. The method of claim 3, wherein: the value range of T0 is 390-425 ℃.

5. The method of claim 4, wherein: the value range of T0 is 400-420 ℃.

6. A method for detecting high-temperature activated carbon and cooling a blanking channel comprises the following steps:

3) A thermal imager (1) tracks and shoots a secondary thermal imaging graph of the material at the suspected high-temperature point entering a second detection area (302) on the vibrating screen (2), and further judges whether the suspected high-temperature point is a high-temperature point;

4) Extinguishing and cooling the detected high-temperature material by an activated carbon extinguishing and cooling device arranged at an active carbon channel (7) on the screen between the vibrating screen (2) and the conveyor (8);

wherein, on the vibrating screen (2), a first detection zone (301) is located upstream of a second detection zone (302); in the step 4), the activated carbon extinguishing and cooling device is a cooling water spraying device (6); the fire extinguishing and cooling treatment comprises the following steps: the cooling water spraying device (6) arranged on the active carbon channel (7) on the screen sprays cooling water to the detected high-temperature material, so that the high-temperature material is extinguished and cooled;

in the fire extinguishing and temperature reducing treatment in the step 4), the mass flow of the cooling water sprayed by the cooling water spraying device (6) satisfies the following relational expression:

wherein: LL (LL) _H1 Cooling water flow, kg/s, sprayed in the quenching and cooling process of the activated carbon; c. C _ht Is the specific heat capacity of the activated carbon, kJ/(kg. DEG C); LL (LL) _ht The flow rate of the activated carbon to be quenched and cooled is kg/s; delta T _ht1 Quenching the temperature reduction target of the active carbon in the cooling process by adopting cooling water; c _H1 For water at evaporating temperatureThe specific heat capacity of (1), kJ/(kg. DEG C); t is _e1 The evaporation temperature of water, DEG C; t is _e2 The initial temperature of the cooling water is DEG C; c _H2 The specific heat capacity of water at the initial temperature, kJ/(kg. DEG C); h is _hz Is the latent heat of vaporization of water at the evaporation temperature, kJ/kg.

7. The method of claim 6, wherein: a cover plate (201) is arranged on the vibrating screen (2), and materials entering the vibrating screen (2) move along the length direction of the vibrating screen (2);

in the step 1), the thermal imager (1) shoots the material entering the first detection area (301) in real time to obtain a primary thermal image, which specifically comprises:

1b) The thermal imaging instrument (1) shoots materials entering a first detection area (301) on the vibrating screen (2) in real time through the observation device (4) and the opening to obtain a primary thermal imaging graph; and/or

8. The method of claim 7, wherein: in the step 2), whether the material entering the first detection area (301) has a high temperature point is judged according to the thermal imaging image analysis, and the method specifically comprises the following steps:

acquiring a highest temperature value T1 in the primary thermal imaging image according to the primary thermal imaging image, and comparing the highest temperature value T1 with a set target temperature T0; if T1 is not more than T0, judging that the primary thermal imaging image does not have a high temperature point, and repeating the step 1); if T1 is larger than T0, judging that the primary thermal imaging image has a suspected high-temperature point;

dividing the secondary thermal imaging graph into n areas, obtaining the highest temperature of each area in the n areas, selecting the highest temperature value T2 in the n highest temperatures, and comparing the highest temperature value T2 with a set target temperature T0; if T2 is less than or equal to T0, judging the suspected high-temperature point as a false high-temperature point; if T2 is larger than T0, confirming that the suspected high temperature point is a high temperature point; and determining the found position of the material at the high temperature point in a second detection area (302) on the vibrating screen (2) and alarming through the area of the highest temperature value T2 corresponding to the secondary thermal imaging graph.

9. The method of claim 8, wherein: the value range of T0 is 390-425 ℃.

10. The method of claim 9, wherein: the value range of T0 is 400-420 ℃.

11. A method for detecting high-temperature activated carbon and cooling a blanking channel comprises the following steps:

in the step 4), the activated carbon extinguishing cooling device comprises an activated carbon extinguishing device and an activated carbon cooling device; wherein the activated carbon extinguishing device is a gas blowing device (5); the active carbon cooling device is a cooling water spraying device (6); the fire extinguishing and cooling treatment comprises the following steps: the gas blowing device (5) arranged on the active carbon channel (7) on the screen is used for blowing fire extinguishing gas to the detected high-temperature material to finish the extinguishing treatment of the high-temperature material; cooling water is sprayed on the detected high-temperature materials through a cooling water spraying device (6) arranged on the active carbon channel (7) on the screen, so that the cooling treatment on the high-temperature materials is completed;

in the fire extinguishing and temperature reducing treatment in the step 4), the gas spraying device (5) sprays fire extinguishing gas to the detected high-temperature materials, and meanwhile, the cooling water spraying device (6) sprays cooling water to the detected high-temperature materials; wherein the flow V of the fire extinguishing gas blown by the gas blowing device (5) _N The following formula is satisfied:

in the formula: v _N The flow of the fire extinguishing gas, m, blown in the process of extinguishing the activated carbon ³ /s；S _T Is the cross-sectional area of the passage of the activated carbon on the sieve, m ² ；L ₂ For the nozzle position and cooling water spraying device of the gas injection deviceHeight difference m between the positions of the arranged nozzles; t is t _i0 The time s for the high-temperature material to move from the detected high-temperature point position to the nozzle position of the gas blowing device;

the water spray rate LL of the cooling water spray device (6) _H2 The following formula is satisfied:

in the formula: LL (LL) _H2 The flow rate of cooling water sprayed out in the cooling treatment process of the active carbon is kg/s; c _ht The specific heat capacity of the activated carbon is kJ/(kg DEG C); LL (LL) _ht The flow rate of the activated carbon to be cooled is kg/s; delta T _ht2 The temperature of the active carbon is reduced to the target value of DEG C; c _H1 kJ/(kg. DEG C), which is the specific heat capacity of water at the evaporation temperature; t is _e1 The evaporation temperature of water, DEG C; t is _e2 The initial temperature of the cooling water is DEG C; c _H2 kJ/(kg. DEG C), which is the specific heat capacity of water at the initial temperature; h is _hz Is the latent heat of vaporization of water at the evaporation temperature, kJ/kg.

12. The method of claim 11, wherein: a cover plate (201) is arranged on the vibrating screen (2), and materials entering the vibrating screen (2) move along the length direction of the vibrating screen (2);

13. The method of claim 12, wherein: in the step 2), whether the material entering the first detection area (301) has a high temperature point is judged according to the thermal imaging image analysis, and the method specifically comprises the following steps:

dividing the secondary thermal imaging graph into n areas, obtaining the highest temperature of each area in the n areas, selecting the highest temperature value T2 in the n highest temperatures, and comparing the highest temperature value T2 with a set target temperature T0; if T2 is less than or equal to T0, judging the suspected high-temperature point as a false high-temperature point; if T2 is more than T0, confirming the suspected high temperature point as a high temperature point; and determining the found position of the material at the high temperature point in a second detection area (302) on the vibrating screen (2) and alarming through the area of the highest temperature value T2 corresponding to the secondary thermal imaging graph.

14. The method of claim 13, wherein: the value range of T0 is 390-425 ℃.

15. The method of claim 14, wherein: the value range of T0 is 400-420 ℃.

16. A system for use in the method of any one of claims 1-15, the system comprising a thermal imaging camera (1), a vibrating screen (2), an activated carbon quench cooling device, an oversize activated carbon tunnel (7), a conveyor (8); an oversize active carbon outlet of the vibrating screen (2) is connected with a feed inlet of a conveyor (8) through an oversize active carbon channel (7); a cover plate (201) is arranged on the vibrating screen (2); the thermal imaging system (1) is arranged above a cover plate (201) of the vibrating screen (2); an imaging area (3) is arranged on the vibrating screen (2); the imaging zone (3) comprises a first detection zone (301) and a second detection zone (302); -on the vibrating screen (2), the first detection zone (301) is located upstream of the second detection zone (302); the activated carbon extinguishing and cooling device is arranged on the activated carbon channel (7) on the screen;

the activated carbon extinguishing cooling device is a gas blowing device (5); the gas injection device (5) comprises a gas conveying main pipe (501), a gas conveying branch pipe (502) and a gas nozzle (504); the gas delivery main pipe (501) is arranged outside the on-screen activated carbon channel (7); the gas delivery branch pipe (502) is arranged on the active carbon passage (7) on the screen; one end of the gas delivery branch pipe (502) is connected with the gas delivery main pipe (501), and the other end of the gas delivery branch pipe extends into the on-screen activated carbon channel (7); the tail end of the gas delivery branch pipe (502) is provided with a gas nozzle (504); the gas conveying main pipe (501) is provided with a gas valve (503), and the gas valve (503) controls the opening and closing of the gas injection device (5); or

The activated carbon extinguishing cooling device is a cooling water spraying device (6); the cooling water spraying device (6) comprises a cooling water conveying main pipe (601), a cooling water conveying branch pipe (602) and a cooling water nozzle (604); the cooling water conveying main pipe (601) is arranged outside the on-screen activated carbon channel (7); the cooling water conveying branch pipe (602) is arranged on the on-screen activated carbon channel (7); one end of the cooling water delivery branch pipe (602) is connected with the cooling water delivery main pipe (601), and the other end of the cooling water delivery branch pipe extends into the oversize activated carbon channel (7); the tail end of the cooling water delivery branch pipe (602) is provided with a cooling water nozzle (604); a cooling water valve (603) is arranged on the cooling water conveying main pipe (601), and the cooling water valve (603) controls the cooling water spraying device (6) to be opened and closed; or

The active carbon extinguishing cooling device comprises an active carbon extinguishing device and an active carbon cooling device; wherein the active carbon extinguishing device is a gas blowing device (5) arranged on the active carbon channel (7) on the screen; the active carbon cooling device is a cooling water spraying device (6) arranged on the active carbon channel (7) on the screen.

17. The system of claim 16, wherein: the number of the gas conveying branch pipes (502) is multiple; each gas conveying branch pipe (502) is connected with a gas conveying main pipe (501), and a plurality of gas conveying branch pipes (502) are uniformly distributed along the periphery of the on-screen activated carbon channel (7); the gas nozzles (504) are positioned at the lower side of the tail end of the gas conveying branch pipe (502); or

The number of the cooling water conveying branch pipes (602) is multiple; each cooling water conveying branch pipe (602) is connected with a cooling water conveying main pipe (601), and a plurality of cooling water conveying branch pipes (602) are uniformly distributed along the periphery of the on-screen activated carbon channel (7); the cooling water nozzles (604) are positioned at the lower sides of the tail ends of the cooling water delivery branch pipes (602).

18. The system of claim 17, wherein: the number of the gas conveying branch pipes (502) is 2-30; or

The number of the cooling water conveying branch pipes (602) is 2-30.

19. The system of claim 18, wherein: the number of the gas conveying branch pipes (502) is 3-16; or

The number of the cooling water conveying branch pipes (602) is 3-16.

20. The system of claim 19, wherein: the cooling water delivery branch pipe (602) of the cooling water spraying device (6) is arranged below the gas delivery branch pipe (502) of the gas blowing device (5).

21. The system of claim 19, wherein: the system also comprises an observation device (4), wherein the observation device (4) is arranged on the upper part of the cover plate (201) of the vibrating screen (2) and is positioned between the cover plate (201) of the vibrating screen (2) and the thermal imaging camera (1); the viewing device (4) comprises a sidewall shroud (401), a top viewing aperture (402) and a bottom viewing aperture (403); the area enclosed by the top end edge of the side wall cover body (401) is the top observation hole (402); the area enclosed by the bottom end edge of the side wall cover body (401) is the bottom observation hole (403);

the thermal imaging system (1) surrounds the observation device (4) and reciprocates in a vertical plane, and the thermal imaging system (1) shoots materials entering a first detection area (301) and/or a second detection area (302) on the vibrating screen (2) in real time through the observation device (4) to obtain a primary thermal imaging diagram and/or a secondary thermal imaging diagram.

22. The system of claim 21, wherein: an opening is formed in a cover plate (201) of the vibrating screen (2), and an observation hole (403) in the bottom of the observation device (4) is equal to the opening in the cover plate (201) in size and is superposed in position; the width of the opening is equal to the width of the vibrating screen (2).

23. The system of claim 22, wherein: the bottom of the observation device (4) is also provided with a front partition plate (404) and a rear partition plate (405), the two partition plates are both positioned at the bottom of the side wall cover body (401), the front partition plate (404) is positioned at the upstream side of the bottom observation hole (403), and the rear partition plate (405) is positioned at the downstream side of the bottom observation hole (403).

24. The system of claim 23, wherein: according to the position change of the thermal imaging camera (1) which reciprocates around the observation device (4) in a vertical plane, the front partition plate (404) and the rear partition plate (405) correspondingly move along the length direction of the vibrating screen (2) in the plane of the bottom observation hole (403); the center of the gap between the front baffle plate (404) and the rear baffle plate (405), the center of the top observation hole (402) and the thermal imaging camera (1) are on the same straight line.

25. The system according to any one of claims 16-24, wherein: the system also comprises a data processing module (A1) and a control system (A2); the thermal imager (1) is connected with a data processing module (A1), and the data processing module (A1) is connected with a control system (A2); meanwhile, a gas valve (503) of the gas blowing device (5) and/or a cooling water valve (603) of the cooling water spraying device (6) are connected with the control system (A2); the control system (A2) controls the operation of the data processing module (A1), the thermal imager (1), the gas valve (503) and the cooling water valve (603).