CN112857577A

CN112857577A - Method and system for detecting and secondarily treating high-temperature activated carbon

Info

Publication number: CN112857577A
Application number: CN202110025005.XA
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: 2021-05-28

Abstract

A method for detecting and secondarily treating high-temperature activated carbon comprises the following steps: 1) the material enters the vibrating screen, and the thermal imager shoots the material entering an imaging area on the vibrating screen in real time to obtain a thermal imaging image; 2) analyzing and judging whether the material entering the imaging area has a high temperature point or not according to the thermal imaging image; 2a) if the thermal imaging image does not have the high temperature point, repeating the step 1); 2b) if the thermal imaging image is judged to have a high temperature point, performing primary fire extinguishing and cooling treatment on the material at the high temperature point on the vibrating screen; 3) after the primary fire extinguishing and cooling treatment, the secondary fire extinguishing and cooling treatment is carried out on the corresponding high-temperature materials at the position of the active carbon channel on the screen. The invention adopts secondary fire extinguishing and cooling treatment to the detected high-temperature material, can effectively prevent the situation that the high-temperature active carbon is not sufficiently cooled in the primary treatment process, and further ensures the safe and stable operation of the system.

Description

Method and system for detecting and secondarily treating high-temperature activated carbon

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 activated carbon detection and secondary treatment, 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 SO₂、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 (main component of pollutant is SO) generated in sintering process₂) 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 gas₂) 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 the analysis and activation is subjected to an acid making process, the activated carbon after the analysis and activation is cooled to 110-130 ℃ and then discharged out of the analysis tower, activated carbon dust is screened out by a vibrating screen, and the activated carbon particles on the screen reenter the adsorption tower through an activated carbon conveyor S2; fresh activated carbon is supplied to the conveyor S1 (activated carbon used in the flue gas purification apparatus is cylindrical activated carbon granules having typical sizes: 9mm in diameter and 11mm in height).

As shown in figure 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 and secondarily treating high-temperature activated carbon. 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, extinguishes and cools the detected high temperature materials for the first time in the imaging area, and extinguishes and cools the detected high temperature materials for the second time at the position of an activated carbon channel on the screen. 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 positioned and processed in time, 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 detect and treat comprehensively is solved, and the safety of the system is improved.

According to a first embodiment of the present invention, a method for high temperature activated carbon detection and secondary treatment is provided.

A method for detecting and secondarily treating high-temperature activated carbon comprises the following steps:

1) the material enters the vibrating screen, and the thermal imager shoots the material entering an imaging area on the vibrating screen in real time to obtain a thermal imaging image;

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

2a) if the thermal imaging image does not have the high temperature point, repeating the step 1);

2b) if the thermal imaging image is judged to have a high temperature point, performing primary fire extinguishing and cooling treatment on the material at the high temperature point on the vibrating screen;

3) after the primary fire extinguishing and cooling treatment, the secondary fire extinguishing and cooling treatment is carried out on the corresponding high-temperature materials at the position of the active carbon channel on the screen.

Preferably, in step 2), the material at the high-temperature point is subjected to primary fire extinguishing and temperature reduction treatment, specifically: when the thermal imaging image is judged to have a high-temperature point, the gas blowing device arranged above the imaging area on the vibrating screen blows fire extinguishing gas to the detected high-temperature material, and further primary fire extinguishing and cooling treatment on the high-temperature material is realized.

Preferably, in step 3), the secondary fire extinguishing and cooling treatment is performed on the corresponding high-temperature material, specifically: work as the material of high temperature point department moves to the active carbon passageway position on the sieve between shale shaker and the conveyer, sprays the cooling water to the high temperature material that detects through the cooling water sprinkler who sets up on the active carbon passageway on the sieve, and then realizes the secondary of high temperature material and puts out a fire the cooling and handle.

Preferably, in the primary fire-extinguishing and temperature-reducing treatment in step 2), the flow rate of the fire-extinguishing gas blown by the gas blowing device satisfies the following relational expression:

in the formula: v_NFlow of extinguishing gas, m, blown for one-time fire-extinguishing and temperature-lowering process³/s。V_TIs the volume of the inner space of the vibrating screen, m³。t_i0The time s for the activated carbon particles to move from the detected high-temperature point position to the on-screen activated carbon outlet at the tail part of the vibrating screen.

Preferably, in the secondary fire-extinguishing and temperature-reducing treatment in step 3), the mass flow rate of the cooling water sprayed by the cooling water spraying device satisfies the following relation:

wherein: LL (LL)_HThe flow of cooling water sprayed in the secondary fire extinguishing and temperature reducing process is kg/s. C_htThe specific heat capacity of the activated carbon is kJ/(kg-DEG C). LL (LL)_htThe flow rate of the activated carbon to be quenched and cooled is kg/s. Delta T_htThe temperature of the active carbon is lower than the temperature of the active carbon in the secondary fire extinguishing and cooling process. C_H1The specific heat capacity of water at the evaporation temperature, kJ/(kg. DEG C.). T is_e1The evaporation temperature of water, DEG C. T is_e2The initial temperature of the cooling water is DEG C. C_H2The specific heat capacity of water at the initial temperature, kJ/(kg. DEG C.). h is_hzIs 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. The imaging zone includes a first detection zone and a second detection zone. On the shaker screen, the first detection zone is located upstream of the second detection zone.

In step 1), the material entering the vibrating screen for imaging is shot in real time to obtain a thermal imaging image, and the method specifically comprises the following steps:

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 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, in step 2), whether the material entering the imaging area has a high temperature point is judged according to the thermal imaging image analysis, specifically:

the thermal imaging instrument shoots the material entering the first detection area on the vibrating screen in real time to obtain a primary thermal imaging image. According to the primary thermal imaging graph, the highest temperature value T1 in the primary thermal imaging graph is obtained, and the highest temperature value T1 is compared with the set target temperature T0. If T1 is less than or equal to T0, the primary thermal imaging graph does not have a high temperature point, and the step 1) is repeated. If T1 > T0, the primary thermal image has a suspected high temperature point. Preferably, the value range of T0 is 380-430 ℃, and preferably 410-425 ℃.

If the primary thermal imaging graph is judged to have suspected high-temperature points, the thermal imaging instrument tracks and detects the materials in the area to obtain a secondary thermal imaging graph. Dividing the secondary 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. And if the T2 is less than or equal to T0, the suspected high temperature point is a false high temperature point. And if T2 is greater than T0, confirming that the suspected high temperature point is the high temperature point. The highest temperature value T2 corresponds to the area on the secondary thermal imaging graph, so that the found position of the material at the high temperature point in the second detection area on the vibrating screen is determined and recorded.

According to a second embodiment of the present invention, a system for high temperature activated carbon detection and secondary treatment is provided.

The system comprises a thermal imager, a vibrating screen, an on-screen activated carbon channel, a conveyor, a gas injection device and a cooling water injection device. 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 gas blowing device is arranged above the imaging area on the vibrating screen. The cooling water spraying device is arranged on the active carbon channel on the screen.

Preferably, the system further comprises a viewing device. The observation 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 imager. The viewing device includes a sidewall shield, 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 imaging zone on the shaker screen comprises a first detection zone and a second detection zone, the first detection zone being located upstream of the second detection zone. 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 gas blowing device comprises a main gas conveying pipe and a branch gas conveying pipe. The gas transmission main pipe is arranged on the side wall cover body of the observation device. The gas delivery branch pipe is arranged in the observation device. One end of the gas delivery main pipe is provided with a fire extinguishing gas inlet, and the other end of the gas delivery main pipe extends into the observation device and is communicated with the gas delivery branch pipe. A plurality of gas blowing holes are formed in the lower edge of the gas conveying branch pipe, and the plurality of gas blowing holes are uniformly distributed. 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 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 delivery main pipe and controls the cooling water spraying device to be opened and closed.

Preferably, the number of the cooling water delivery branch pipes is plural, preferably 2 to 30, 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.

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, a gas valve of the gas injection device and a cooling water valve of the cooling water injection device are 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 and the buffer bin are all airtight structures, and activated carbon is in a large amount of gathering states 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 analysis tower and an adsorption tower, and all the activated carbon needs to be screened out 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.

In the present application, a method for high temperature activated carbon detection and secondary treatment is provided. The method comprises the steps of firstly, shooting 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, recording the found position of the material at the high temperature point in the imaging area; the gas injection device above the imaging area carries out primary fire extinguishing and cooling treatment on the gas injection device, and then the cooling water spraying device on the active carbon channel on the screen carries out secondary fire extinguishing and cooling treatment on the gas injection device, so that the situation that the high-temperature active carbon cannot be completely cooled by primary detection treatment is prevented, and the safety of the system is ensured.

After the thermal imaging appearance detected the high temperature point, safe processing mode mainly includes relatively: 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 high-temperature state above the spontaneous combustion point is continuously maintained, spontaneous combustion can occur in the air, so that the spontaneous combustion activated carbon particles need to be safely disposed, and then the spontaneous combustion activated carbon needs to be extinguished and cooled.

In the present invention, the high temperature activated carbon is disposed of by quenching first followed by cooling. The invention adopts nitrogen and CO₂And inert gases and other gases capable of isolating oxygen are used as flame-retardant gases, after a high-temperature point is found, the fire-extinguishing gases are sprayed to the materials at the high-temperature point for flame retardance, and then water is used as a medium to cool the high-temperature activated carbon. Generally, the burning carbon will undergo a water gas reaction when it is in contact with water, but in the context of the application of the present invention, the pyrophoric or high temperature activated carbon particles are all activated carbon particlesThe volume and the range of the active carbon particles at the high-temperature point are very small, the active carbon particles can be quickly extinguished and cooled after meeting water, and continuous water gas reaction conditions are not formed. Further, in the present application, the cooling water spraying device is provided on the passage of the activated carbon on the screen between the vibrating screen and the conveyor, and the gas spraying device is provided in the observation device above the image forming area. That is, the high-temperature activated carbon particles or the spontaneous combustion activated carbon particles detected by the thermal imaging instrument can firstly perform primary fire extinguishing and temperature reduction through the fire extinguishing gas (such as nitrogen) injected by the gas injection device in the observation device, and the fire extinguishing gas injected by the gas injection device can ensure that the smoldering activated carbon particles are isolated from the air before reaching the activated carbon channel on the screen. That is to say, the water mist spraying of the cooling water spraying device to the activated carbon particles which can still keep higher temperature after one-time fire extinguishing and temperature reduction is basically carried out in the oxygen-free environment, thereby further ensuring the safety of adopting water as the cooling medium. Furthermore, water is used as the cooling medium in the present application in view of its low cost and ready availability. According to the invention, the cooling water spraying device is arranged at the position of the on-screen active carbon channel between the vibrating screen and the conveyor, when the gas spraying device carries out primary fire extinguishing and cooling on the detected high-temperature active carbon, the high-temperature active carbon particles continuously move to the position of the on-screen active carbon channel at the tail part of the vibrating screen, at the moment, the cooling water spraying device opens the cooling water valve to spray cooling water on the corresponding high-temperature active carbon, so that secondary fire extinguishing and cooling on the corresponding high-temperature active carbon are realized, the situation that insufficient cooling may exist in the primary fire extinguishing and cooling treatment process is avoided, and the safe and stable operation of the system is ensured.

In the present invention, the flow rate of the fire extinguishing gas blown by the gas blowing device satisfies the following relational expression:

in the formula: v_NFlow of extinguishing gas, m, blown for one-time fire-extinguishing and temperature-lowering process³/s；V_TIs the volume of the inner space of the vibrating screen, m³；t_i0The time s for the activated carbon particles to move from the detected high-temperature point position to the on-screen activated carbon outlet at the tail part of the vibrating screen. The flow of the fire extinguishing gas blown in the extinguishing process of the activated carbon calculated according to the formula 1 can ensure that smoldering activated carbon particles are isolated from air before reaching an on-screen activated carbon channel between the vibrating screen and the conveyor, namely the smoldering activated carbon particles are all in an oxygen-free environment in the whole vibrating screen. 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 10-60 s. Or the spraying time t1 of the fire extinguishing gas is more than or equal to the detected time for the high-temperature activated carbon particles to run to the discharge port at the tail of the vibrating screen. For example, in fig. 13, when the detected high-temperature activated carbon particles reach the discharge port at the rear of the vibrating screen, the gas injection device closes the valve, that is, the fire extinguishing gas injection is completed, and at this time, the cooling water spray device opens the valve to start spraying water mist. Or when the detected high-temperature activated carbon particles move to a discharge hole at the tail of the vibrating screen, the cooling water spraying device starts spraying water mist, and after the cooling water spraying device sprays water mist for 0.5-1 s, the gas spraying device closes the valve to finish gas spraying. By the arrangement, on one hand, the cooling water spraying device can spray water mist as far as possible in an oxygen-free environment; meanwhile, considering that the falling speed of the activated carbon on the screen is high in the falling process of the activated carbon channel, the contact time of the activated carbon with cooling water is short, and the activated carbon can be ensured to contact with the cooling water for a long time when passing through the screen activated carbon channel by properly spraying the cooling water in advance, so that the aim of extinguishing and cooling the high-temperature activated carbon is fulfilled.

According to the heat balance of the activated carbon and the cooling water, the mass flow of the cooling water sprayed by the cooling water spraying device satisfies the following relational expression:

generally, the spontaneous combustion or high-temperature activated carbon (about 420 ℃) detected by the thermal imaging system is higher after the extinguishing treatment by blowing the extinguishing gas by the gas blowing deviceTemperature, in equation 2, for example, the amount of cooling water is taken into consideration in order to cool the activated carbon by 15 to 20 ℃ (e.g., Δ T)_ht215 c) to ensure that the cooling water is completely converted to water vapour during the cooling process, and 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 c. As can be seen from the formula 2, the invention avoids the liquid water from entering the conveyor and even the whole flue gas purification device by accurately controlling the water spraying amount of the cooling water spraying device, thereby avoiding the active carbon powder from being adhered to the conveying equipment caused by the liquid water in the conveying system, and simultaneously avoiding the incompletely resolved SO in the liquid water and the active carbon₂Reaction to form H₂SO₄And 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. In addition, the cooling water sprinkler mainly carries out secondary auxiliary cooling treatment to the remaining high temperature active carbon after the cooling treatment of once putting out a fire, and length of time t2 of spraying of cooling water sprinkler then can adjust according to operating mode and experience, for example length of time t2 of spraying of cooling water is 5 ~ 60 s.

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 highest temperature value T1 in the primary thermal imaging map with the target temperature T0, it can be determined whether there is a high temperature point in the primary thermal imaging map. If T1 is not more than T0, it is determined that the primary thermal imaging graph does not have a high temperature point, and the thermal imaging instrument continues to perform high temperature detection on the material subsequently entering the first detection area. If T1 is greater than T0, the primary thermal imaging image is judged to have 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 graph into n regions (for example, into nine-square grids), acquiring the highest temperature value T2 in the n regions, and comparing T2 with the target temperature T0 to determine whether the suspected high temperature point is a high temperature point. And if the T2 is not more than T0, judging that the suspected high temperature point is a false high temperature point, and continuously carrying out high temperature monitoring on the material subsequently entering the first detection area by the thermal imager. If T2 is greater than T0, the suspected high temperature point is determined to be a high temperature point, the highest temperature value T2 corresponds to an area on the secondary thermal imaging graph, and therefore the found position of the material at the high temperature point in the second detection area is determined and an alarm is given to the control system. 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 more accurate judgment is made on whether the suspected high-temperature point is the high-temperature point.

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 camera can detect all the activated carbon flowing through the screen plate of the vibrating screen. Meanwhile, an observation device (such as a thermal imaging camera observation cover) is arranged on the upper part of the opening of the vibrating screen cover plate. 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 smooth, 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 side surface of the observation device has enough dust absorption area and 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 the imaging environment and the 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 of the thermal imaging instrument which makes reciprocating motion around the observation device in a vertical plane, 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 problem caused by the large-size observation hole formed in the cover plate of the vibrating screen, reduce the requirement on the dedusting air volume, and simultaneously still meet the requirement of a thermal imager for 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 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 a relative concept in terms of the flow direction of the activated carbon particles on a conveyor such as a vibrating screen or a conveyor, that is, a position where the activated carbon particles pass first on the conveyor is upstream, and a position where the activated carbon particles pass later on the conveyor 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 injection amount of the gas injection device and the water injection amount of the cooling water injection device can be accurately controlled, the extinguishing and cooling of the high-temperature activated carbon are realized, the waste is avoided, 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 detected high-temperature activated carbon is subjected to primary fire extinguishing and temperature reducing treatment and then subjected to secondary fire extinguishing and temperature reducing treatment, so that the high-temperature activated carbon which is not completely treated is prevented from remaining, the extinguishing and cooling effects on the high-temperature activated carbon are ensured, and the safety of the system is improved.

4. 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 solves the problem that high-temperature activated carbon particles in the activated carbon flue gas purification device are difficult to detect comprehensively.

5. 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, observation obstacles 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 prevented from jumping 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 of high temperature activated carbon detection and secondary treatment in accordance with 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 schematic structural view of a vibrating screen, an oversize activated carbon passage and a conveyor in the invention;

FIG. 9 is a schematic diagram of a high temperature activated carbon detection and secondary treatment system according to the present invention;

FIG. 10 is a plan view of a gas blowing device in the present invention;

FIG. 11 is a plan view of the cooling water spray apparatus of the present invention;

FIG. 12 is a side view of the cooling water spraying apparatus of the present invention;

FIG. 13 is a logic block diagram of the quenching and cooling process of the high temperature activated carbon in 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: gas blowing holes 504: a gas valve; 6: a cooling water spray device; 601: a cooling water delivery main pipe; 602: a cooling water delivery branch pipe; 603: a cooling water nozzle; 604: a cooling water valve; 7: an active carbon channel is arranged on the screen; 8: a conveyor; a1: a data processing module; a2: and (5) controlling the system.

Detailed Description

According to a second embodiment of the present invention, a method and system for high temperature activated carbon detection and secondary treatment is provided.

The utility model provides a system for high temperature active carbon detects and secondary treatment, this system includes that this system includes thermal imaging system 1, shale shaker 2, oversize active carbon passageway 7, conveyer 8, gaseous jetting device 5, cooling water sprinkler 6. 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 gas blowing device 5 is arranged above the imaging area 3 on the vibrating screen 2. The cooling water spraying device 6 is arranged on the on-screen activated carbon channel 7.

Preferably, the system further comprises a viewing device 4. 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 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, the imaging zone 3 on the shaker screen 2 includes a first detection zone 301 and a second detection zone 302, the first detection zone 301 being located upstream of the second detection zone 302. The thermal imaging system 1 surrounds the observation device 4 makes reciprocating motion in a vertical plane, and the thermal imaging system 1 shoots materials entering the first detection area 301 and the 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 a secondary thermal imaging diagram.

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, 405 are correspondingly moved in the plane of the bottom viewing aperture 403 along the length of the shaker screen 2 in response to changes in the position of the thermal imaging camera 1 reciprocating in a vertical plane about the viewing device 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 gas blowing device 5 includes a main gas delivery pipe 501 and a branch gas delivery pipe 502. The gas delivery main pipe 501 is provided on the side wall cover 401 of the observation apparatus 4. The gas delivery manifold 502 is disposed within the viewing device 4. One end of the main gas delivery pipe 501 is provided with a fire extinguishing gas inlet, and the other end extends into the observation device 4 and is communicated with the gas delivery branch pipe 502. The lower edge of the gas delivery branch pipe 502 is provided with a plurality of gas blowing holes 503, and the plurality of gas blowing holes 503 are uniformly distributed. Preferably, the gas delivery main pipe 501 is provided with a gas valve 504, and the gas valve 504 controls the opening and closing of the gas blowing device 5.

Preferably, the cooling water spraying device 6 includes a cooling water delivery main pipe 601, a cooling water delivery branch pipe 602, and a cooling water nozzle 603. 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 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 distal end with a cooling water nozzle 603. Preferably, the cooling water delivery main pipe 601 is provided with a cooling water valve 604, and the cooling water valve 604 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 the 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 603 are located at the lower side of the distal end of the cooling water delivery manifold 602.

Preferably, the system also comprises a data processing module A1 and a control system A2. The thermal imaging system 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 504 of the gas blowing device 5 and the cooling water valve 604 of the cooling water spraying device 6 are connected to the control system a 2. The control system a2 controls the operation of the data processing module a1, the thermal imager 1, the gas valve 504, and the cooling water valve 604.

Example 1

As shown in fig. 8 and 9, the system includes a thermal imaging camera 1, a vibrating screen 2, an oversize activated carbon passage 7, a conveyor 8, a gas blowing device 5, and a cooling water spraying device 6. 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 gas blowing device 5 is arranged above the imaging area 3 on the vibrating screen 2. The cooling water spraying device 6 is arranged on the on-screen activated carbon channel 7.

Example 2

As shown in fig. 4-5, example 1 is repeated except that the system further comprises a viewing device 4. 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 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.

The imaging zone 3 on the shaker screen 2 includes a first detection zone 301 and a second detection zone 302, the first detection zone 301 being located upstream of the second detection zone 302. The thermal imaging system 1 surrounds the observation device 4 makes reciprocating motion in a vertical plane, and the thermal imaging system 1 shoots materials entering the first detection area 301 and the 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 a secondary thermal imaging diagram.

Example 3

As shown in fig. 6, example 2 is repeated except that 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 side wall casing 401, the front partition 404 is located on the upstream side of the bottom observation hole 403, and the rear partition 405 is located on the downstream side of the bottom observation hole 403.

In response to the change in the position of the thermal imaging camera 1 reciprocating in the vertical plane about the viewing device 4, the front and

rear bulkheads

404, 405 move along the length of the shaker 2 in the plane of the bottom viewing aperture 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 4

As shown in FIG. 10, example 3 was repeated except that the gas blowing device 5 included a main gas-conveying pipe 501 and a branch gas-conveying pipe 502. The gas delivery main pipe 501 is provided on the side wall cover 401 of the observation apparatus 4. The gas delivery manifold 502 is disposed within the viewing device 4. One end of the main gas delivery pipe 501 is provided with a fire extinguishing gas inlet, and the other end extends into the observation device 4 and is communicated with the gas delivery branch pipe 502. The lower edge of the gas delivery branch pipe 502 is provided with a plurality of gas blowing holes 503, and the plurality of gas blowing holes 503 are uniformly distributed. The gas delivery main pipe 501 is provided with a gas valve 504, and the gas valve 504 controls the opening and closing of the gas blowing device 5.

Example 5

As shown in fig. 11 and 12, example 4 is repeated except that 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 603. 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 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 distal end with a cooling water nozzle 603. Preferably, the cooling water delivery main pipe 601 is provided with a cooling water valve 604, and the cooling water valve 604 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 603 are located at the lower side of the distal end of the cooling water delivery manifold 602.

Example 6

As shown in FIG. 7, example 5 is repeated except that the system further includes a data processing module A1, a control system A2. The thermal imaging system 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 504 of the gas blowing device 5 and the cooling water valve 604 of the cooling water spraying device 6 are connected to the control system a 2. The control system a2 controls the operation of the data processing module a1, the thermal imager 1, the gas valve 504, and the cooling water valve 604.

Example 7

As shown in fig. 3, a method for detecting and secondarily treating high-temperature activated carbon includes the following steps:

1) the material enters the vibrating screen 2, and the thermal imaging instrument 1 shoots the material entering the imaging area 3 on the vibrating screen 2 in real time to obtain a thermal imaging image;

2) analyzing and judging whether the material entering the imaging area 3 has a high temperature point or not according to the thermal imaging image;

2b) if the thermal imaging image is judged to have a high temperature point, performing primary fire extinguishing and cooling treatment on the material at the high temperature point on the vibrating screen 2;

3) after the primary fire extinguishing and temperature reducing treatment, the secondary fire extinguishing and temperature reducing treatment is carried out on the corresponding high-temperature materials at the position of the active carbon channel 7 on the screen.

Example 8

Example 7 is repeated, except that in step 2), the material at the high-temperature point is subjected to one-time fire extinguishing and temperature reducing treatment, specifically: when the thermal imaging image is judged to have a high-temperature point, the gas blowing device 5 arranged above the imaging area 3 on the vibrating screen 2 blows fire extinguishing gas to the detected high-temperature material, and then primary fire extinguishing and cooling treatment on the high-temperature material is realized.

In step 3), carry out secondary to corresponding high temperature material and put out a fire the cooling and handle, specifically do: work as the material of high temperature point department moves to the 7 positions of active carbon passageway on the sieve between shale shaker 2 and the conveyer 8, sprays the cooling water to the high temperature material that detects through the cooling water sprinkler 6 that sets up on active carbon passageway 7 on the sieve, and then realizes the secondary of high temperature material and puts out a fire the cooling and handle.

Example 9

As shown in fig. 13, example 8 was repeated except that in the primary fire-extinguishing and temperature-reducing process described in step 2), the flow rate of the fire-extinguishing gas blown by the gas-blowing device 5 satisfied the following relational expression:

In the secondary fire-extinguishing and temperature-reducing treatment in the step 3), the mass flow of the cooling water sprayed by the cooling water spraying device 6 satisfies the following relational expression:

Example 10

Example 9 is repeated except that the vibrating screen 2 is provided with a cover plate 201, and the material entering the vibrating screen 2 moves along the length direction of 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;

in step 1), the material entering the imaging area 3 on the vibrating screen 2 is shot in real time to obtain a thermal imaging image, which specifically comprises the following steps:

1a) the 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 system 1 surrounds the observation device 4 makes reciprocating motion in a vertical plane, the thermal imaging system 1 shoots materials entering the first detection area 301 and the second detection area 302 on the vibrating screen 2 in real time through the observation device 4, and a primary thermal imaging diagram and a secondary thermal imaging diagram are obtained.

Example 11

The embodiment 10 is repeated, except that in the step 2), whether the material entering the imaging area 3 has a high temperature point is judged according to the thermal imaging image analysis, specifically:

the thermal imaging system 1 shoots the material entering the first detection area 301 on the vibrating screen 2 in real time to obtain a primary thermal imaging diagram. According to the primary thermal imaging graph, the highest temperature value T1 in the primary thermal imaging graph is obtained, and the highest temperature value T1 is compared with the set target temperature T0. If T1 is less than or equal to T0, the primary thermal imaging graph does not have a high temperature point, and the step 1) is repeated. If T1 > T0, the primary thermal image has a suspected high temperature point. T0 was taken to be 400 ℃.

If the primary thermal imaging graph is judged to have suspected high-temperature points, the thermal imaging instrument 1 tracks and detects the materials in the area to obtain a secondary thermal imaging graph. Dividing the secondary imaging graph into 5 areas, obtaining the highest temperature of each of the 5 areas, selecting the highest temperature value T2 of the 5 highest temperatures, and comparing the highest temperature value T2 with a set target temperature T0. And if the T2 is less than or equal to T0, the suspected high temperature point is a false high temperature point. And if T2 is greater than T0, confirming that the suspected high temperature point is the high temperature point. The highest temperature value T2 corresponds to the area on the secondary thermal imaging graph, so as to determine and record the found position of the material at the high temperature point in the second detection area 302 on the vibrating screen 2.

Application example 1

A method of high temperature activated carbon detection and observation of cooling at a device using the system of example 6, the method comprising the steps of:

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) according to the primary thermal imaging graph analysis, the highest material temperature T1 in the first detection area 301 is obtained as 430 ℃, T1 is compared with a set target temperature T0, the value of T0 is 410 ℃, and T1 is more than T0, so that the fact that a suspected high temperature point exists in the primary thermal imaging graph is judged.

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;

dividing the secondary thermal imaging graph into 9 areas, acquiring the highest temperature of each of the 9 areas, selecting the highest temperature value T2 of the 9 highest temperatures as 430 ℃, and comparing the highest temperature value T2 with the set target temperature T0 as 410 ℃. T2 > T0, and the suspected high temperature point is confirmed to be a high temperature point. The highest temperature value T2 corresponds to the area on the secondary thermal imaging graph, so that the found position of the material at the high temperature point in the second detection area 302 on the vibrating screen 2 is determined and an alarm is given.

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 injection device 5 injects fire extinguishing gas to the detected material at the high-temperature point, and one-time fire extinguishing and temperature reducing treatment on the corresponding high-temperature material is completed. Wherein the spraying time t1 of the fire extinguishing gas is longer than the detected time for the high-temperature activated carbon particles to move to the discharge port at the tail of the vibrating screen, and t1 is 12 s. The fire extinguishing gas is nitrogen. The flow rate of the fire extinguishing gas blown by the gas blowing device 5 is as follows:

in the formula: v_NFlow of extinguishing gas, m, blown for one-time fire-extinguishing and temperature-lowering process³/s。V_TIs the volume of the inner space of the vibrating screen, V_T＝4m³。t_i0The time for the activated carbon particles to move from the detected high-temperature point position to the on-screen activated carbon outlet at the tail part of the vibrating screen, t_i0＝10s。

The detected high-temperature activated carbon still has higher temperature after primary fire extinguishing and temperature reducing treatment by blowing nitrogen through the gas blowing device 5, and secondary fire extinguishing and temperature reducing treatment is continuously carried out through the cooling water spraying device 6. When the material of high temperature point department moves 7 positions of active carbon passageway on the sieve between shale shaker 2 and the conveyer 8, is sprayed the cooling water by the cooling water sprinkler 6 that sets up on active carbon passageway 7 on the sieve to the high temperature material that detects, and then accomplishes the secondary of high temperature material and put out a fire the cooling and handle. Wherein, the time period t2 for spraying cooling water is 10 s. Water spray quantity LL of cooling water spray device 6_HThe following formula is satisfied:

wherein: LL (LL)_HThe flow of cooling water sprayed in the secondary fire extinguishing and temperature reducing process is kg/s. C_htIs the specific heat capacity of activated carbon, C_ht＝0.84kJ/(kg·℃)。LL_htFor the flow of the cooled activated carbon to be extinguished, LL_ht＝5kg/s。ΔT_htDelta T is the active carbon cooling target in the secondary fire extinguishing and cooling process_ht＝50℃。C_H1Specific heat capacity of water at evaporation temperature, C_H1＝4.22kJ/(kg·℃)。T_e1Is the evaporation temperature of water, T_e1＝100℃。T_e2Is the initial temperature of the cooling water, T_e2＝25℃。C_H2Specific heat capacity of water at initial temperature, C_H2＝4.177kJ/(kg·℃)。h_hzThe latent heat of vaporization of water at the evaporation temperature, h_hz＝2257.1kJ/kg。

Application example 2

2) according to the primary thermal imaging graph analysis, the maximum material temperature T1 in the first detection area 301 is obtained to be 156 ℃, T1 is compared with a set target temperature T0, the value of T0 is 410 ℃, and T1 is less than T0, so that the primary thermal imaging graph is judged not to have a suspected 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 and secondarily treating high-temperature activated carbon comprises the following steps:

1) the material enters the vibrating screen (2), and the thermal imaging instrument (1) shoots the material entering an imaging area (3) on the vibrating screen (2) in real time to obtain a thermal imaging image;

2) analyzing and judging whether the material entering the imaging area (3) has a high temperature point or not according to the thermal imaging image;

2b) if the thermal imaging image is judged to have a high temperature point, performing primary fire extinguishing and cooling treatment on the material at the high temperature point on the vibrating screen (2);

3) after primary fire extinguishing and temperature reducing treatment, secondary fire extinguishing and temperature reducing treatment is carried out on corresponding high-temperature materials at the position of the active carbon channel (7) on the screen.

2. The method of claim 1, wherein: in step 2), the material at the high-temperature point is subjected to primary fire extinguishing and cooling treatment, specifically: when the thermal imaging image is judged to have a high-temperature point, a gas injection device (5) arranged above an imaging area (3) on the vibrating screen (2) is used for injecting fire extinguishing gas to the detected high-temperature material, so that the high-temperature material is subjected to primary fire extinguishing and cooling treatment; and/or

In step 3), carry out secondary to corresponding high temperature material and put out a fire the cooling and handle, specifically do: work as the material of high temperature point department moves to the active carbon passageway (7) position on the sieve between shale shaker (2) and conveyer (8), sprays the cooling water to the high temperature material that detects through setting up cooling water sprinkler (6) on active carbon passageway (7) on the sieve, and then realizes the secondary of high temperature material and puts out a fire the cooling and handle.

3. The method of claim 2, wherein: in the primary fire-extinguishing and temperature-reducing treatment in the step 2), the flow of the fire-extinguishing gas sprayed by the gas spraying device (5) satisfies the following relational expression:

in the formula: v_NFlow of extinguishing gas, m, blown for one-time fire-extinguishing and temperature-lowering process³/s；V_TIs the volume of the inner space of the vibrating screen, m³；t_i0The time s for the activated carbon particles to move from the detected high-temperature point position to an on-screen activated carbon outlet at the tail part of the vibrating screen; and/or

In the secondary fire-extinguishing and temperature-reducing treatment in the step 3), the mass flow of the cooling water sprayed by the cooling water spraying device (6) meets the following relational expression:

wherein: LL (LL)_HThe flow rate of cooling water sprayed in the secondary fire extinguishing and temperature reducing process is kg/s; c_htThe specific heat capacity of the activated carbon is kJ/(kg DEG C); LL (LL)_htThe flow rate of the activated carbon to be quenched and cooled is kg/s; delta T_htThe temperature of the active carbon is controlled to be lower than the temperature of the active carbon in the secondary fire extinguishing and temperature lowering process; c_H1The specific heat capacity of water at the evaporation temperature, kJ/(kg. DEG C); t is_e1The evaporation temperature of water, DEG C; t is_e2The initial temperature of the cooling water, DEG C; c_H2The specific heat capacity of water at the initial temperature, kJ/(kg. DEG C); h is_hzIs the latent heat of vaporization of water at the evaporation temperature, kJ/kg.

4. The method according to any one of claims 1-3, 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); the imaging zone (3) comprises a first detection zone (301) and a second detection zone (302); -on said vibrating screen (2), a first detection zone (301) is located upstream of a second detection zone (302);

in the step 1), the material entering the imaging area (3) on the vibrating screen (2) is shot in real time to obtain a thermal imaging image, and the method 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 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.

5. The method of claim 4, wherein: in the step 2), whether the material entering the imaging area (3) has a high temperature point is judged according to the thermal imaging image analysis, and the method specifically comprises the following steps:

the thermal imaging instrument (1) shoots materials entering a first detection area (301) on the vibrating screen (2) in real time to obtain a primary thermal imaging graph; acquiring a highest temperature value T1 in the primary thermal imaging graph according to the primary thermal imaging graph, and comparing the highest temperature value T1 with a set target temperature T0; if T1 is not more than T0, the primary thermal imaging graph does not have a high temperature point, and the step 1) is repeated; if T1 is greater than T0, the primary thermal image has a suspected high temperature point; preferably, the value range of T0 is 380-430 ℃, and preferably 410-425 ℃;

if the primary thermal imaging graph is judged to have suspected high-temperature points, the thermal imaging instrument (1) tracks and detects the materials in the area to obtain a secondary thermal imaging graph; dividing the secondary imaging graph into n regions, obtaining the highest temperature of each region in the n regions, 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, the suspected high temperature point is a false high temperature point; if T2 is greater than T0, confirming that the suspected high temperature point is a high temperature point; the highest temperature value T2 corresponds to the area on the secondary thermal imaging graph, so that the found position of the material at the high temperature point in the second detection area (302) on the vibrating screen (2) is determined and recorded.

6. A system for high temperature activated carbon detection and secondary treatment or a system for use in the method of any of claims 1-5, the system comprising a thermal imager (1), a vibrating screen (2), an oversize activated carbon passage (7), a conveyor (8), a gas injection device (5), a cooling water spray device (6); 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 gas injection device (5) is arranged above the imaging area (3) on the vibrating screen (2); and the cooling water spraying device (6) is arranged on the on-screen activated carbon channel (7).

7. The system of claim 6, wherein: the system further comprises a viewing device (4); 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);

preferably, the imaging zone (3) on the vibrating screen (2) comprises a first detection zone (301) and a second detection zone (302), the first detection zone (301) being located upstream of the second detection zone (302); 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.

8. The system of claim 7, 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 on the upstream side of the bottom observation hole (403), and the rear partition plate (405) is positioned on the downstream side of the bottom observation hole (403);

preferably, the front partition (404) and the rear partition (405) move along the length direction of the vibrating screen (2) in the plane of the bottom observation hole (403) correspondingly according to the position change of the thermal imaging camera (1) making reciprocating motion around the observation device (4) in the vertical plane; preferably, the center of the gap between the front diaphragm (404) and the rear diaphragm (405) is on the same line with the center of the top observation hole (402) and the thermal imaging camera (1).

9. The system according to claim 7 or 8, characterized in that: the gas injection device (5) comprises a gas delivery main pipe (501) and a gas delivery branch pipe (502); the gas delivery main pipe (501) is arranged on a side wall cover body (401) of the observation device (4); the gas delivery branch pipe (502) is arranged in the observation device (4); one end of the gas delivery main pipe (501) is provided with a fire extinguishing gas inlet, and the other end of the gas delivery main pipe extends into the observation device (4) and is communicated with the gas delivery branch pipe (502); the lower edge of the gas conveying branch pipe (502) is provided with a plurality of gas blowing holes (503), and the plurality of gas blowing holes (503) are uniformly distributed; preferably, the gas delivery main pipe (501) is provided with a gas valve (504), and the gas valve (504) controls the opening and closing of the gas blowing device (5).

10. The method according to any one of claims 6-9, wherein: 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 (603); 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 active carbon channel (7) on the screen; the tail end of the cooling water delivery branch pipe (602) is provided with a cooling water nozzle (603); preferably, a cooling water valve (604) is arranged on the cooling water conveying main pipe (601), and the cooling water valve (604) controls the cooling water spraying device (6) to be opened and closed;

preferably, the number of the cooling water conveying branch pipes (602) is multiple, preferably 2 to 30, and more preferably 3 to 16; 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); preferably, the cooling water nozzles (603) are located at the lower side of the distal end of the cooling water delivery manifold (602).

11. The method according to any one of claims 6-10, wherein: the system also comprises a data processing module (A1), a control system (A2); the thermal imaging camera (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 (504) of the gas injection device (5) and a cooling water valve (604) of the cooling water injection device (6) are connected with a control system (A2); the control system (A2) controls the operation of the data processing module (A1), the thermal imager (1), the gas valve (504), and the cooling water valve (604).