CN112875348A

CN112875348A - Method and system for quenching and cooling treatment of high-temperature activated carbon after conveyor

Info

Publication number: CN112875348A
Application number: CN202110045151.9A
Authority: CN
Inventors: 陈思墨; 周浩宇; 刘雁飞; 王业峰; 刘前; 李谦
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-06-01
Anticipated expiration: 2041-01-13
Also published as: CN112875348B

Abstract

The method for quenching and cooling treatment of high-temperature activated carbon behind a conveyor comprises the step of shooting the activated carbon flowing through a discharge guide pipe in real time by arranging a thermal imager in the discharge guide pipe to obtain a thermal imaging image. And then, analyzing and judging whether the activated carbon flowing through the discharging guide pipe has a high-temperature point or not according to the thermal imaging image. If the high-temperature point exists, corresponding high-temperature activated carbon is quenched and cooled in the discharge hopper by adopting a mode of blowing oxygen-insulating fire-extinguishing gas or water mist. The method detects the spontaneous combustion high-temperature activated carbon in the discharging link of the activated carbon flue gas purification device, and can extinguish and cool the high-temperature activated carbon, so that the problem that high-temperature activated carbon particles are difficult to detect and dispose comprehensively is solved, and the safety of the system is improved.

Description

Method and system for quenching and cooling treatment of high-temperature activated carbon after conveyor

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 quenching and cooling treatment of high-temperature activated carbon after a conveyor, 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 aims to provide a method and a system for quenching and cooling treatment of high-temperature activated carbon after a conveyor. According to the invention, the thermal imager is arranged on the discharge guide pipe of the activated carbon flue gas purification device, the thermal imager shoots the activated carbon material flowing through the discharge guide pipe to obtain a thermal imaging image, and then analyzes and judges whether the activated carbon material has a high temperature point, an alarm is given to the control module after the high temperature point is found, and the control module controls the oxygen-isolating fire extinguishing device or the water spray cooling device to extinguish and cool the high temperature activated carbon material in the discharge hopper. According to the technical scheme provided by the invention, the spontaneous combustion or high-temperature activated carbon is detected in the discharging link of the activated carbon flue gas purification device, and the spontaneous combustion or high-temperature activated carbon can be extinguished and cooled, so that the problem that high-temperature activated carbon particles are difficult to detect and dispose comprehensively is solved, and the safety of the system is improved.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

according to a first embodiment of the invention, a method for quenching and cooling treatment of high-temperature activated carbon after a conveyor is provided.

A method for quenching and cooling treatment of high-temperature activated carbon after a conveyor comprises the following steps:

1) the active carbon after the completion analysis is carried through the conveyer, and on the section of unloading, the active carbon in the conveyer is carried to the discharge hopper in through the pipe of unloading.

2) In the discharging guide pipe, the thermal imager shoots the activated carbon flowing through the discharging guide pipe in real time to obtain a thermal imaging image.

3) And analyzing and judging whether the activated carbon flowing through the discharging guide pipe has a high-temperature point or not according to the thermal imaging image.

3a) And if the thermal imaging image does not have the high temperature point, repeating the step 2).

3b) And if the thermal imaging image is judged to have the high temperature point, performing the step 4).

4) The active carbon enters the discharge hopper through the discharge guide pipe, corresponding high-temperature active carbon is sprayed with oxygen-insulating fire-extinguishing gas or water mist for extinguishing and cooling treatment, the active carbon entering the discharge hopper is conveyed to the storage bin, and finally the active carbon is distributed to the carbon-requiring units through the storage bin.

Preferably, in step 3), whether the activated carbon flowing through the discharge conduit has a high temperature point is judged according to the thermal imaging image analysis, specifically:

and the thermal imager shoots the activated carbon flowing through the discharging guide pipe in real time to obtain a primary thermal imaging image. And acquiring the 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 the set target temperature T0. And 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 2). If T1 is greater than T0, the primary thermal imaging image is judged to have a suspected high temperature point, and the thermal imaging instrument starts to rotate (generally, the thermal imaging instrument performs reciprocating swing type rotation in the flowing direction of the activated carbon) to perform tracking shooting on the activated carbon flowing through the discharging guide pipe, so that a secondary thermal imaging image is obtained. And acquiring a highest temperature value T1 'in the secondary thermal imaging image according to the secondary thermal imaging image, and comparing the highest temperature value T1' with a set target temperature T0. And if the T1' is less than or equal to T0, judging the suspected high temperature point as a false high temperature point, and repeating the step 2). If T1' is greater than T0, the suspected high temperature point is confirmed as the high temperature point, and step 4) is performed. Preferably, the value range of T0 is 390-425 ℃, and preferably 400-420 ℃.

Preferably, the secondary thermal imaging image is divided into n regions, the highest temperature of each region in the n regions is obtained, and the highest temperature value of the n highest temperatures is selected to be T1'. Preferably, n has a value of 1 to 20, preferably 3 to 15. The number of tracking shots of the thermal imaging camera is 1-5, preferably 2-3.

Preferably, in step 4), the high-temperature activated carbon is sprayed with oxygen-insulating fire extinguishing gas to perform extinguishing and cooling treatment, specifically: when the activated carbon material is judged to have a high-temperature point, oxygen-isolating fire extinguishing gas is sprayed on the corresponding high-temperature activated carbon through the oxygen-isolating fire extinguishing device arranged on the discharge hopper, so that the high-temperature activated carbon is extinguished and cooled. Preferably, the oxygen-barrier fire extinguishing gas is nitrogen or carbon dioxide. Or

In the step 4), the water mist sprayed by the high-temperature activated carbon is extinguished and cooled, and the method specifically comprises the following steps: and when the activated carbon material is judged to have a high-temperature point, spraying water mist to the corresponding high-temperature activated carbon through a water spraying cooling device arranged on the discharge hopper, so that the activated carbon is extinguished and cooled.

Preferably, the time when the oxygen-barrier fire extinguishing device starts to blow the oxygen-barrier fire extinguishing gas or the time when the water mist cooling device starts to blow the water mist is set to t 0', s. Then t 0' satisfies the following relationship:

formula I, t0 ═ t0..

Wherein t0 is the moment when the thermal imaging instrument detects that the activated carbon in the discharge conduit has a high temperature point, s. t 0' is the time when the oxygen-barrier fire-extinguishing device starts to blow oxygen-barrier fire-extinguishing gas or the water mist starts to blow water mist by the water spray cooling device, s.

Preferably, in step 4), when the oxygen-barrier fire extinguishing device is used for extinguishing and cooling the high-temperature activated carbon, the time period t1 for blowing the oxygen-barrier fire extinguishing gas by the oxygen-barrier fire extinguishing device 6 satisfies the following relational expression:

wherein: t1 is the time length s of the oxygen-isolating fire extinguishing device for blowing oxygen-isolating fire extinguishing gas to the high-temperature activated carbon. k1 is the safety factor of oxygen-isolating fire-extinguishing treatment, and the value is 1.2-2.5, preferably 1.6-2.1. C1 is the specific heat capacity of the activated carbon, kJ/(kg-DEG C). M1 is the mass of high temperature activated carbon, kg. Δ t_cnThe temperature difference is DEG C before and after the quenching and cooling treatment of the high-temperature activated carbon. V1 is the gas flow velocity of oxygen-isolating fire extinguishing gas sprayed by the oxygen-isolating fire extinguishing device, m/s. S1 is the nozzle area of oxygen-isolating fire-extinguishing gas sprayed by oxygen-isolating fire-extinguishing device, m². C2 is the specific heat capacity of oxygen-insulating fire-extinguishing gas, kJ/(kg-DEG C). Rho 1 is the density of oxygen-insulating fire-extinguishing gas, kg/m³。Δt_nThe temperature difference of the gas before and after the extinguishing and cooling treatment of the high-temperature activated carbon is carried out for the oxygen-isolating fire extinguishing gas, and the temperature is lower than the temperature of the gas.

Preferably, in step 4), when the quenching and cooling treatment of the high-temperature activated carbon is performed by using a water spray cooling device, the time period t2 for spraying water mist by the water spray cooling device satisfies the following relational expression:

wherein t2 is the duration s of the water spray cooling device spraying water mist to the high-temperature activated carbon. k2 is the safety coefficient of water spray cooling treatment, and the value is 1.2-2.5, preferably 1.6-2.1. C1 is the specific heat capacity of the activated carbon, kJ/(kg-DEG C). M1 is the mass of high temperature activated carbon, kg. Δ t_cwThe temperature difference is DEG C before and after the quenching and cooling treatment of the high-temperature activated carbon. V2 is the flow velocity of the water mist sprayed by the water spray cooling device, m/s. S2 is the area of the spray opening, m, of the spray cooling device spraying water mist². ρ 2 is the density of water, kg/m³. C2 is the specific heat capacity of water at the local atmospheric pressure and water evaporation temperature, kJ/(kg. DEG C.). C3 is the local atmospheric pressure and the specific heat capacity of water at the initial temperature, kJ/(kg. DEG C.). T2 is the evaporation temperature of water at local atmospheric pressure, DEG C. T3 is the initial temperature of the sprayed water mist at the local atmospheric pressure, DEG C. h is_wIs the latent heat of vaporization of water at the local atmospheric pressure and water evaporation temperature, kJ/kg.

According to a second embodiment of the invention, a system for post-conveyor high-temperature activated carbon quenching cooling treatment or a system for the post-conveyor high-temperature activated carbon quenching cooling treatment method according to the first embodiment is provided, and the system comprises a discharge conduit, a discharge hopper, a storage bin and a conveyor. And the discharge hole of the conveyor is connected with the feed inlet of the discharge guide pipe. The discharge hole of the discharge guide pipe is connected with the feed inlet of the discharge hopper. The discharge hole of the discharge hopper is connected with the feed inlet of the storage bin. And a thermal imager is arranged on the discharging guide pipe. And an oxygen-isolating fire extinguishing device or a water spray cooling device is arranged on the discharge hopper.

Preferably, a viewing port is provided in an upper side wall of the discharge duct. A light shield is arranged on the observation port. The thermal imager is arranged on the top of the light shield. The thermal imaging instrument shoots the material entering the discharging guide pipe in real time through the observation port to obtain a thermal imaging image.

Preferably, the discharge conduit comprises an inclined section and a vertical section, and the material entering the discharge conduit passes through the inclined section and the vertical section of the discharge conduit in sequence. The viewing port is arranged on the inclined section of the discharge conduit. The top surface of the light shield is arranged in parallel with the axis of the inclined section of the discharge guide pipe. Preferably, the discharge duct is provided at one side of an upper portion of the discharge hopper.

Preferably, the oxygen-isolating fire extinguishing device comprises an air inlet pipe, an air nozzle and an air valve. The air inlet pipe is arranged on the discharge hopper. The air nozzle is arranged at an inlet at the upper part of the discharging hopper and is positioned at one side opposite to the discharging guide pipe. The air inlet pipe penetrates through the outer wall of the discharge hopper and then is connected with the air nozzle. The air valve is arranged on the air inlet pipe. Preferably, the blowing direction of the air nozzle is parallel to the side wall of the discharge hopper on the side where the air nozzle is located. Or

The water spray cooling device comprises a water inlet pipe, a water spray nozzle and a water valve. The inlet tube sets up the outside at the discharge hopper. The water mist nozzle is arranged at the top of the discharging hopper and is positioned at one side close to the discharging guide pipe. And the nozzle end of the water mist nozzle penetrates through the top of the discharge hopper and extends into the feed inlet of the discharge hopper. The water inlet end of the water spray nozzle is communicated with the water inlet pipe. The water valve is arranged on the water inlet pipe. Preferably, the spraying direction of the water mist nozzles is perpendicular to the side wall of the discharge hopper on the side where the water mist nozzles are located.

Preferably, a cooling protective cover is further provided outside the thermal imaging camera. The cooling protective cover is arranged on the top surface of the light shield and covers the thermal imaging camera. Preferably, the thermal imaging camera rotates in the cooling protective cover, so that the materials entering the discharging guide pipe are shot and tracked and shot.

Preferably, an upper dust removal air port and a lower dust removal air port are further arranged on the upper side wall of the inclined section of the discharge conduit. Wherein, the upper dust removal air port is positioned at the upstream of the light shield. The lower dust removal air port is positioned at the downstream of the light shield.

Preferably, the conveyor is a bucket conveyor. In general, when the bucket conveyor is used for discharging, the bucket conveyor is used for discharging one bucket after another, that is, in the present application, when the bucket conveyor discharges to the feed inlet of the discharge conduit, the bucket conveyor is used for feeding the materials in the buckets of the bucket conveyor one by one. Generally, a bucket conveyor can simultaneously feed a plurality of discharge conduits (the discharge conduits are followed by a discharge hopper, a feed pipe, a storage bin, and a demand device.

Preferably, the system further comprises a data processing module and a control module. The data processing module is connected with the control module, and the air valve or the water valve is connected with the control module. When the activated carbon flowing through the discharging guide pipe is analyzed and judged to have a high-temperature point according to the thermal imaging image, the data processing module gives an alarm to the control module, and the control module controls the operation of the air valve or the water valve to realize oxygen-isolating fire extinguishing treatment or water spraying cooling treatment on the high-temperature activated carbon.

In the prior art, as shown in fig. 1, activated carbon in an activated carbon flue gas purification apparatus circulates between a desorption column and an adsorption column. All links such as analytic tower, adsorption tower, conveyer, surge bin are airtight structure, and the active carbon is a large amount of gathering states in above device, and the high temperature active carbon that appears occasionally probably is in the encirclement of a group of normal atmospheric temperature active carbon, is difficult to detect high temperature active carbon granule comprehensively.

In the activated carbon flue gas purification device, activated carbon circulates between an analytical tower and an adsorption tower, and all the activated carbon is conveyed to the activated carbon adsorption tower through an activated carbon conveyor through a discharge guide pipe, a discharge hopper, a storage bin and the like in the circulation. The active carbon particles are in a flat state of inclined rolling on the discharge conduit. The reduction active carbon layer thickness that can the at utmost for the active carbon is more dispersed, reduces the mutual cladding degree of active carbon (mainly avoid high temperature active carbon to be unfavorable for being detected the discovery after by the low temperature active carbon cladding) and make the active carbon granule of bottom sheltered from the minimum by top layer active carbon granule, changes to be detected the discernment by thermal imaging, avoids lou examining. Therefore, detecting the high-temperature activated carbon particles (or the spontaneous combustion activated carbon) on the discharge guide pipe is one of the most beneficial ways for detecting and finding the high-temperature activated carbon particles in the activated carbon flue gas purification process.

The invention provides a method for quenching and cooling treatment of high-temperature activated carbon after a conveyor. In the method, a thermal imaging instrument firstly shoots materials (active carbon) entering an imaging area in a discharge guide pipe in real time to obtain a thermal imaging image. And then, 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 continues to monitor the material entering the imaging area in the discharging guide pipe. And when the thermal imaging image is judged to have a high-temperature point, extinguishing and cooling the high-temperature activated carbon by adopting an oxygen-isolating fire-extinguishing treatment device or a water-spraying cooling treatment device in the discharge hopper, so that the high-temperature activated carbon material is extinguished and cooled. The imaging area is the maximum effective area which can be detected by the thermal imaging camera through the observation port to the discharge bottom surface (inclined surface) of the discharge conduit.

Generally, after the thermal imaging camera detects the pyrophoric activated carbon particles (pyrophoric high temperature or high temperature activated carbon), the relatively safe disposal method mainly comprises: 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 once the spontaneous combustion activated carbon particles meet air again, so that the spontaneous combustion activated carbon particles need to be further safely disposed, namely, the spontaneous combustion activated carbon particles need to be extinguished and then cooled. In the present invention, fire extinguishing gas (e.g., nitrogen, CO) capable of isolating oxygen is used₂Inert gas, etc.) to extinguish the fire of the high-temperature activated carbon, and after the fire is extinguished, continuing to blow the gas to finish the cooling. Or spraying water mist for extinguishing, cooling and cooling. Or simultaneously adopts the design of combining air injection extinguishing and water spray cooling to carry out the cooling extinguishing treatment of the spontaneous combustion activated carbon. Thereby realizing the extinguishing and cooling of the high-temperature materials.

In the invention, because the discharge guide pipe comprises the inclined section and the vertical section, the activated carbon is in a flat rolling state when flowing through the inclined section of the discharge guide pipe, and in this state, the activated carbon is exposed thoroughly (namely the low-temperature activated carbon is difficult to coat the high-temperature activated carbon), so that the detection accuracy is greatly improved by arranging the thermal imager on the inclined section of the discharge guide pipe to carry out high-temperature detection on the activated carbon material flowing through the discharge guide pipe. When the thermal imaging device is used for detecting materials, the thermal imaging device shoots the activated carbon flowing through the discharge guide pipe in real time in a primary thermal imaging area to obtain a primary thermal imaging image (the thermal imaging image is an infrared picture with temperature information, and the temperature information of the materials at each point in the imaging area can be read from the thermal imaging image). According to the primary thermal imaging image, a maximum temperature value T1 in the primary thermal imaging image is obtained, and the maximum temperature value T1 is compared with a set target temperature T0 (safe temperature). And if the T1 is not more than T0, judging that the primary thermal imaging image does not have a high temperature point, and continuing the detection work. If T1 is greater than T0, the primary thermal imaging image is judged to have a suspected high temperature point, and the thermal imaging instrument starts to rotate (generally, the thermal imaging instrument performs reciprocating swing type rotation in the flowing direction of the activated carbon) to perform tracking shooting on the activated carbon flowing through the discharge guide pipe in the secondary thermal imaging area, so that a secondary thermal imaging image is obtained. And acquiring a highest temperature value T1 'in the secondary thermal imaging image according to the secondary thermal imaging image, and comparing the highest temperature value T1' with a set target temperature T0. And if the T1' is less than or equal to T0, judging the suspected high temperature point as a false high temperature point. And if T1' is more than T0, the suspected high temperature point is confirmed to be a high temperature point, and the high temperature activated carbon is quenched and cooled. Generally, the value range of T0 is 390-425 ℃, preferably 400-420 ℃. In order to further embody the accuracy or precision of the high-temperature detection, the secondary thermal imaging image can be a plurality of pictures which are continuously and repeatedly shot, and the temperature information of the material at the high-temperature point in the plurality of pictures which are continuously and repeatedly shot is compared, so that more accurate judgment is made on whether the high-temperature point is a real high-temperature point. It should be noted that the primary thermal imaging area and the secondary thermal imaging area are corresponding to each other and can be adjusted according to actual needs, for example, the area through which the high-temperature activated carbon on the discharge conduit can be actually photographed by the thermal imaging camera through the viewing port is evenly divided, the half area located at the upstream is the primary thermal imaging area, and the half area located at the downstream is the secondary thermal imaging area. Generally, an effective area of thermal imaging detection is generally divided into a primary thermal imaging area, a secondary thermal imaging area, a tertiary thermal imaging area, a.

In the invention, when the activated carbon flowing through the discharge conduit is detected to have a high temperature point, the detected high temperature activated carbon particles are subjected to fire extinguishing and cooling treatment mainly through two schemes. Wherein, one treatment scheme is to start the oxygen-isolating fire extinguishing device arranged on the discharge hopper to extinguish and cool. In the invention, the oxygen-isolating fire extinguishing device comprises an air inlet pipe, an air nozzle and an air valve. The air inlet pipe is arranged on the discharge hopper. The air nozzle is arranged in the discharge hopper, and the air inlet pipe penetrates through the outer wall of the discharge hopper and then is connected with the air nozzle. The air valve is arranged on the air inlet pipe. When the high temperature activated carbon particle who detects is unloaded to the discharge hopper in by the pipe of unloading, high temperature activated carbon particle is in the landing state, and the activated carbon particle of landing state is more for the dispersion than other states, and each layer activated carbon particle is less to sheltering from each other, arranges oxygen fire extinguishing device here promptly, the oxygen fire extinguishing gas that separates that oxygen fire extinguishing device jets can be more even more abundant contact and cladding with high temperature activated carbon particle or be full of around high temperature activated carbon particle to can realize extinguishing and cooling of high temperature activated carbon particle fast more. In addition, the jetting direction of air nozzle is parallel rather than the lateral wall of the discharge hopper of place one side, and the jetting direction of air nozzle sets up with the feeding direction of active carbon relatively promptly for fire extinguishing gas can be more abundant with the contact of high temperature active carbon granule, more is favorable to realizing the temperature regulation or the accuse temperature to high temperature active carbon granule.

In the present invention, when the oxygen-barrier fire-extinguishing device is used to extinguish and cool the high-temperature activated carbon, the time when the oxygen-barrier fire-extinguishing device starts to blow the oxygen-barrier fire-extinguishing gas is set to t 0', s. Then t 0' satisfies the following relationship:

formula I, t0 ═ t0..

Wherein t0 is the moment when the thermal imaging instrument detects that the activated carbon in the discharge conduit has a high temperature point, s. t 0' is the time when the oxygen-barrier fire extinguishing device starts blowing the oxygen-barrier fire extinguishing gas, s. Namely, the starting time of the oxygen-isolating fire extinguishing device is the time of finding the high temperature point of the activated carbon. That is, in the present invention, when the activated carbon is found to have a high temperature point (hereinafter referred to as high temperature activated carbon), the oxygen-barrier fire-extinguishing device is opened to blow oxygen-barrier fire-extinguishing gas (nitrogen, carbon dioxide, inert gas, etc.) into the discharge hopper. Generally, it takes a certain time from the discovery of the high temperature activated carbon to the falling of the high temperature activated carbon into the discharge hopper through the discharge duct (the discharge duct has a certain length). It should be noted that when the oxygen-isolating fire extinguishing apparatus is started to blow oxygen-isolating fire extinguishing gas into the discharge hopper, the detected high-temperature activated carbon does not fall into the discharge hopper. The purpose of blowing oxygen-isolating fire-extinguishing gas into the discharge hopper by opening the oxygen-isolating fire-extinguishing device in advance is as follows: on one hand, oxygen-isolated fire extinguishing gas can be distributed in the discharge hopper in advance to isolate oxygen, so that an oxygen-free environment is created for oxygen-isolated fire extinguishing; secondly, the gas of oxygen fire extinguishing is separated in the jetting in advance, can make high temperature activated carbon one fall into the discharge hopper and begin to extinguish cooling treatment promptly, and the security and the accuracy of oxygen fire extinguishing that separate of very big improvement avoid can not complete the purpose of separating the oxygen fire extinguishing to high temperature activated carbon that can not carry out the jetting again and separate oxygen fire extinguishing gas and lead to when the high temperature material falls into in the discharge hopper.

In the present invention, the time period for blowing the oxygen-barrier fire-extinguishing gas by the oxygen-barrier fire-extinguishing treatment device is set to t1, s in order to ensure the extinguishing cooling effect on the high-temperature activated carbon. The time length t1 for blowing the oxygen-isolating fire extinguishing gas in the oxygen-isolating fire extinguishing treatment satisfies the following relational expression:

wherein: t1 is the time length s of the oxygen-isolating fire extinguishing device for blowing oxygen-isolating fire extinguishing gas to the high-temperature activated carbon. k1 is the safety factor of oxygen-isolating fire-extinguishing treatment, and the value is 1.2-2.5, preferably 1.6-2.1 (which can be adjusted and set according to the actual working condition). C1 is the specific heat capacity of the activated carbon, and the value is 0.84 kJ/(kg-DEG C). M1 is the mass of high temperature activated carbon, kg. Δ t_cnThe temperature difference of the activated carbon before and after quenching and cooling treatment is DEG C. V1 is the gas flow velocity of oxygen-isolating fire extinguishing gas sprayed by the oxygen-isolating fire extinguishing device, m/s. S1 is the nozzle area of oxygen-isolating fire-extinguishing gas sprayed by oxygen-isolating fire-extinguishing device, m². C2 is the specific heat capacity of oxygen-insulating fire-extinguishing gas, kJ/(kg-DEG C). Rho 1 is the density of oxygen-insulating fire-extinguishing gas, kg/m³。Δt_nThe temperature difference of the gas before and after the extinguishing and cooling treatment of the high-temperature activated carbon is carried out for the oxygen-isolating fire extinguishing gas, and the temperature is lower than the temperature of the gas.

Generally, the average temperature of the cooled activated carbon particles discharged from the desorption tower is about 120 to 140 ℃, and the amount of the fire extinguishing gas is considered in terms of reducing the temperature of the activated carbon by 20 to 50 ℃ (for example,. DELTA.t)_cn30 ℃ below zero. Under ideal conditions, the oxygen-barrier fire-extinguishing gas heats up to the average temperature of all the activated carbon particles in the heat exchange process, for exampleSuch as 125 deg.C; if the initial temperature of the oxygen-barrier fire-extinguishing gas is 25 ℃, delta t is measured at the moment_n125-25-100 ℃. In formula II, the meaning of the duration t1 of the fire extinguishing and cooling time of the oxygen-isolating fire extinguishing apparatus is to ensure that the high-temperature activated carbon particles sliding down to the discharge hopper can be fully covered by the oxygen-isolating fire extinguishing gas, isolate oxygen, and take away part of heat, thereby achieving the purpose of reducing the temperature of the high-temperature and smoldering activated carbon particles and extinguishing the smoldering activated carbon particles. The duration t1 of oxygen-insulating fire-extinguishing temperature reduction also shows that the dosage of oxygen-insulating fire-extinguishing gas is accurately controlled, so that the technical scheme of the invention can extinguish and cool the spontaneous combustion activated carbon particles and can control the use cost of the oxygen-insulating fire-extinguishing gas.

In the scheme, nitrogen (which can also be carbon dioxide or inert gas) is selected as the reason of the cooling medium for oxygen isolation, fire extinguishing and temperature reduction: on the one hand, nitrogen can keep apart oxygen and hinder high temperature and smoldering activated carbon burning and play the effect of putting out a fire to can take away partly heat and play the effect of cooling. On the other hand, the desorption tower needs to use a large amount of nitrogen, so that nitrogen gas generating and storing equipment is arranged nearby, and the cooling and fire extinguishing system can be conveniently and directly used. Correspondingly, if a carbon dioxide gas generating and storing device is nearby, such as carbon dioxide generated in the process of calcining limestone (or dolomite) at high temperature, a cooling medium for extinguishing fire and reducing temperature of carbon dioxide can be considered.

In the invention, another treatment scheme for extinguishing fire and reducing temperature of high-temperature activated carbon particles is to adopt a water spray cooling device arranged on a discharge hopper for treatment. The scheme adopts water as a medium to extinguish the spontaneous combustion activated carbon and cool the high-temperature activated carbon. Generally speaking, the burning carbon can generate water gas reaction when meeting water, but in the application scene of the invention, the spontaneous combustion activated carbon particles are local high temperature points in the activated carbon particles, the volume and the range of the burning activated carbon particles are very small, the burning activated carbon particles can be quickly extinguished and cooled after meeting water, and the condition of continuous water gas reaction is not formed; meanwhile, considering that the water is low in cost and easy to obtain, the specific heat capacity of the water is higher than that of gases such as nitrogen and carbon dioxide, the temperature reduction range of the water with the same volume is larger, and the required water amount is smaller. Therefore, the invention can also adopt a mode of spraying water mist by using water as the quenching cooling medium.

In the invention, the water spray cooling device comprises a water inlet pipe, a water spray nozzle and a water valve. The inlet tube sets up the outside at the discharge hopper. The water mist nozzle is arranged on the discharge hopper, and the nozzle end of the water mist nozzle penetrates through the top of the discharge hopper and extends into the feed inlet of the discharge hopper. The water inlet end of the water spray nozzle is communicated with the water inlet pipe. The water valve is arranged on the water inlet pipe. In the water spray cooling device, a water spray nozzle is arranged on one side of a discharge guide pipe on the upper part of a discharge hopper, and activated carbon particles entering the discharge hopper from a guide groove of the discharge hopper cannot contact the position. And the jetting direction of water smoke nozzle is perpendicular rather than the discharge hopper lateral wall of place one side, and the spraying scope of water smoke nozzle is conical, and the spraying direction of water smoke nozzle sets up with the feeding direction of active carbon relatively promptly for spun water smoke can closely direct and the contact of high temperature active carbon particle, and the contact is more abundant, and sprays the wide range, more is favorable to realizing the temperature regulation or the accuse temperature to high temperature active carbon particle. That is, water smoke nozzle spun water smoke can form a water smoke curtain (still have certain thickness simultaneously) below the feed inlet of discharge hopper for all need pass the water smoke curtain and enter into the discharge hopper from the active carbon particle that the pipe discharge gate of unloading falls into, thereby guarantee that active carbon particle homoenergetic and water smoke contact obtain the cooling.

In the present invention, when the quenching and cooling treatment is performed on the high-temperature activated carbon by using the water spray cooling device, the time at which the water spray cooling device starts spraying water mist is also set to t 0', s. Then t 0' satisfies the following relationship:

formula I, t0 ═ t0..

In formula I, t0 is the time when the thermal imaging camera detects that the activated carbon in the discharge conduit has a high temperature point, s. t 0' is the time s when the water mist starts to be blown by the water jet cooling device. Generally, it takes a certain time from the discovery of the high temperature activated carbon to the falling of the high temperature activated carbon into the discharge hopper through the discharge duct. Therefore, on one hand, in order to enable the high-temperature activated carbon to fall into the discharge hopper, the water spray cooling device can form a water mist curtain with a certain thickness at the feed inlet of the discharge hopper, and water mist is generally required to be sprayed in advance; on the other hand, the safety hazard that the water content is too much due to too large amount of advance of spraying the water mist in advance needs to be avoided, so that the time of spraying the water mist needs to be controlled. Typically, the water mist curtain is formed just as well when the activated carbon just falls into the discharge hopper.

In the invention, the water mist spraying time t2 of the water spray cooling treatment satisfies the following relational expression:

wherein t2 is the duration s of water mist spraying and blowing of the water spray cooling device to the high-temperature activated carbon. k2 is the safety coefficient of water spray cooling treatment, and the value is 1.2-2.5, preferably 1.6-2.1 (can be adjusted and set according to actual working conditions). C1 is the specific heat capacity of the activated carbon, and the value is 0.84 kJ/(kg-DEG C). M1 is the mass of high temperature activated carbon, kg. Δ t_cwThe temperature difference of the activated carbon before and after quenching and cooling treatment is DEG C. V2 is the flow velocity of the water mist sprayed by the water spray cooling device, m/s. S2 is the nozzle area of the water spraying cooling device². ρ 2 is the density of water, kg/m³. C2 is the specific heat capacity of water at the local atmospheric pressure and water evaporation temperature, kJ/(kg. DEG C.). C3 is the local atmospheric pressure and the specific heat capacity of water at the initial temperature, kJ/(kg. DEG C.). T2 is the water evaporation temperature at local atmospheric pressure, deg.C. T3 is the initial temperature of the sprayed water mist at the local atmospheric pressure, DEG C. h is_wIs the latent heat of vaporization of water at the local atmospheric pressure and water evaporation temperature, kJ/kg.

Generally, the average temperature of the cooled activated carbon particles discharged from the desorption tower is about 120 to 140 ℃, and the amount of cooling water is considered to reduce the temperature of the activated carbon by 15 to 20 ℃ (for example,. DELTA.t)_cw20 deg.c) while the cooling water is raised during the heat exchange to a water evaporation temperature at the local atmospheric pressure, for example 100 deg.c. The mode that this application was taken is spraying water smoke, and water smoke sprays can direct heat absorption evaporation to high temperature active carbon. To ensure that the cooling water is completely converted into vapor during the quenching treatment, i.e. the liquid water is not carriedAdding into active carbon material. In formula III, the water spray blowing time t2 shows that the spraying mode and spraying time of the cooling water spraying device are precisely controlled, SO that the aim of extinguishing the cooled activated carbon is fulfilled, the spraying amount of water is controlled, and liquid water is prevented from being introduced into a subsequent carbon-requiring unit (such as an activated carbon adsorption tower) or even the whole flue gas purification device, SO that the activated carbon powder is prevented from being adhered to conveying equipment due to the liquid water in a conveying system, and simultaneously, the situation that the incompletely resolved SO in the liquid water and the activated carbon is avoided₂Reaction 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, thereby reducing the use cost and avoiding common technical problems which may occur when the water is used as a cooling medium.

Except two kinds of processing schemes above-mentioned, this application also can be directed against high temperature activated carbon particle jetting gas of putting out a fire and jetting water smoke simultaneously to realize the purpose that high temperature activated carbon particle put out a fire the cooling.

It should be noted that, compared with the case that a fire extinguishing and cooling system (such as an oxygen-isolating fire extinguishing device or a water spray cooling device) is arranged at the position of the storage bin, for conducting fire extinguishing and cooling on high-temperature activated carbon particles falling into the storage bin, the process that the activated carbon particles fall into the storage bin is close to free-fall motion, the blanking speed of the activated carbon particles is high, and the situation that the treatment is not in time or the cooling is insufficient may exist. According to the invention, the oxygen-isolating fire extinguishing device or the water spray cooling device is arranged at the upper part of the discharge hopper, high-temperature activated carbon particles are discharged into the discharge hopper through the discharge guide pipe by the conveyor, the high-temperature activated carbon particles are in a sliding state and have a certain friction force with the side wall of the discharge hopper, namely the speed of the activated carbon particles sliding into the discharge hopper is not fast to fall into the storage bin, and at the moment, the oxygen-isolating fire extinguishing device or the water spray cooling device can extinguish fire and cool the high-temperature activated carbon particles fully, so that the safe and stable operation of the system is ensured.

Generally speaking, the main body of the discharging guide pipe is a sealing structure, the active carbon moves in the discharging guide pipe, and the conventional detection modes such as a thermocouple and the like arranged in the existing discharging guide pipe are difficult to capture high-temperature active carbon particles passing through quickly. The thermal imaging instrument is directly arranged in the discharging guide pipe, so that the space of the discharging guide pipe is insufficient, and the working environment is severe (vibration and dust). Therefore, the existing discharge guide pipe needs to be modified to meet the requirement of a thermal imaging camera for detecting high-temperature activated carbon particles. Thus, in the present invention, the viewing port is provided through the upper side wall of the discharge duct (i.e., the upper surface of the discharge duct). A light shield is arranged on the observation port. The top of the light shield is provided with a through hole. The thermal imager is arranged at the top of the light shield and is used for shooting materials in the discharging guide pipe in real time through the through hole and the observation port to obtain a thermal imaging image. The top surface of the light shield, the plane where the observation port is located and the bottom surface of the discharge guide pipe, into which the materials flow, are designed in parallel. Through set up the mode that the lens hood was established to viewing aperture and cover on the pipe of unloading, can be when not influencing the pipe of unloading and unload, can be relatively more stable and increased sufficient space and then accomplish the installation of thermal imaging system.

Further, the problem that the working environment of the thermal imaging camera is severe (vibration and dust) is solved. An upper dust removal air port is arranged on the upper side wall of the discharging guide pipe positioned at the upstream of the light shield. A lower dust removal air port is arranged on the upper side wall of the discharge conduit positioned at the downstream of the light shield. That is, the dust removing openings are arranged at the upstream and downstream positions of the discharging conduit of the light shield, and the dust suction covers can be arranged on the upper and lower dust removing openings. The dust absorption is covered and is connected with the dust absorption pipeline, and the dust absorption cover passes through the dust absorption pipeline and is connected with dust collector, the dust absorption ability of dust absorption cover can guarantee that thermal imaging appearance during operation, and the thermal imaging region does not have the dust excessive, has solved the high problem of active carbon granule dust concentration when screening. Simultaneously, when jetting separates oxygen fire extinguishing gas or jetting water smoke in the discharge hopper, owing to be provided with the dust removal mouth in the pipe of unloading for be the negative pressure in the pipe of unloading, therefore separate oxygen fire extinguishing gas or water smoke and can extend to in the pipe of unloading, can play and put out a fire in advance and keep apart the purpose that oxygen flowed into in the feed bin in the pipe of unloading. Simultaneously, still make the detection area of thermal imaging appearance be the malleation, reduce the entering of dust etc. avoid influencing the detection accuracy nature of thermal imaging appearance.

In the invention, a cooling protective cover is arranged outside the thermal imaging camera. The cooling protective cover is arranged on the top surface of the light shield and covers the thermal imaging camera. The thermal imager is arranged in the cooling protective cover, on one hand, the cooling protective cover can be filled with compressed air from the top (the end far away from the through hole), the compressed air is sprayed out from the front end (the end close to the through hole), the thermal imager is cooled, the working temperature of the thermal imager is ensured to be not higher than 60 ℃, and dust is prevented from entering the thermal imager to cause instrument faults; meanwhile, compressed air sprayed out of the front end plays a role in cleaning and protecting the lens and the high-definition protective lenses of the protective covers, dust is prevented from gathering, and the lens and the high-definition protective lenses of the protective covers are prevented from being polluted.

Further, the cooling shield is mounted in a central position on top of the light shield. The interior of the light shield is blackened to prevent light reflection. The light shield plays a role in shielding external light and eliminating the interference of the external light to the thermal imager. The compressed gas sprayed out of the cooling protective cover can maintain positive pressure in the light shield, prevent external dust from entering the light shield, and prevent individual activated carbon particles from jumping out of the vibrating screen from the opening of the light shield to damage a thermal imager.

Furthermore, the dust removal air ports are respectively positioned on the discharging guide pipes at the upstream and the downstream of the light shield, and the dust removal air ports are vertical to the inclined sections of the discharging guide pipes, so that the active carbon particles entering the dust removal air ports individually can fall back to the discharging guide pipes by means of gravity. Compressed air sprayed out of the front end of the protective cover and negative pressure of the dust removal air port are cooled, dust in the space of the thermal imaging range is removed, thermal imaging accuracy is improved, and a good working environment is provided for a thermal imaging system.

In the technical scheme of this application, can set up one or more thermal imaging system. 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. The more the number of the thermal imaging cameras is, the closer the single thermal imaging camera is to the discharge guide pipe, and the lower the height of the light shield is. Simultaneously, the rotary motion of certain angle can be done to the thermal imaging system in the cooling protection cover, and the position of thermal imaging system can rotate along with the removal of the interior material of pipe of unloading promptly, and to the material of suspected high temperature point, the thermal imaging system can further track and judge to make and detect more accurate, also more be favorable to realizing the comprehensiveness that detects.

In the invention, the high-temperature detection system of the activated carbon flue gas purification device also comprises a control module and a data processing module. The thermal imaging system obtains thermal imaging images of materials in an imaging area, whether a high-temperature point exists in the corresponding materials or not is judged according to the thermal imaging image analysis, data information which is judged to be the high-temperature point is transmitted to the data processing module, the data processing module is connected with the control module, an alarm is sent to the control module, and the control module enters the next step of processing flow (controls the oxygen-isolating fire extinguishing processing device or the water spray cooling device to process high-temperature activated carbon).

In the present application, the terms "upstream" and "downstream" refer to relative concepts in terms of the flowing direction of the activated carbon particles on the conveying devices such as a conveyor, a discharge duct, a discharge hopper, a silo and the like, that is, on the conveying device, the position where the activated carbon particles pass first is the upstream, and the position where the activated carbon particles pass later is the downstream.

In the invention, the discharging conduit, the hopper, the storage bin and the like are integrally designed in an airtight mode except for a necessary feeding hole, a discharging hole, a water inlet, a water outlet, an ash discharging hole, a dust removing hole and the like. And the feed inlet, the discharge outlet, the water inlet, the water outlet, the ash discharging port, the dust removing port and the like can be provided with corresponding valves

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

1. according to the invention, a high-temperature detection mode that the thermal imager is arranged on the discharge guide pipe is adopted, so that materials are more dispersed on the inclined section of the discharge guide pipe, the bottom layer materials cannot be shielded, and the omission detection can be effectively avoided, so that accurate judgment data of high-temperature points are obtained, and the detection accuracy is improved.

2. According to the technical scheme provided by the invention, under the condition that the materials in the imaging area in the discharging guide pipe are identified to have high temperature points, the time and duration of fire extinguishing gas spraying of the oxygen-isolating fire extinguishing device or the time and duration of water mist spraying of the water spray cooling device can be accurately controlled, the high temperature materials are extinguished and cooled, meanwhile, liquid water is prevented from being brought into a conveying system, and the safety of the system is improved.

3. According to the invention, the discharging guide pipe is provided with the observation port and the observation port is covered with the light shield, so that on one hand, the problem that the thermal imager is difficult to detect and install is solved, and meanwhile, the upper dust removal air port and the lower dust removal air port are arranged to remove observation obstacles, optimize an imaging environment and an imaging background, and simultaneously ensure that activated carbon particles cannot jump out of the discharging guide pipe, thereby ensuring the safe and stable operation of the activated carbon flue gas purification device.

4. According to the invention, a high-temperature detection mode of the thermal imager is adopted, and accurate judgment data of the high-temperature point is obtained by preliminarily judging the suspected high-temperature point and tracking and judging the suspected high-temperature point, so that the detection accuracy is improved.

Drawings

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

Fig. 2 is a schematic structural diagram of a prior art desorption tower.

FIG. 3 is a flow chart of the method for quenching and cooling the high-temperature activated carbon after the conveyor.

FIG. 4 is a schematic view showing the connection relationship between the conveyor, the discharge hopper and the storage bin according to the present invention.

Fig. 5 is a schematic view of a thermal imager mounting structure in accordance with the present invention.

Fig. 6 is a schematic top view of the thermal imaging system according to the present invention.

Fig. 7 is a schematic diagram of a thermal imaging camera shooting thermal imaging images for multiple times according to the invention.

Fig. 8 is a relationship diagram of the thermal imager, the data processing module and the control module in the invention.

Fig. 9 is a data processing flow chart of the thermal imager in the present invention.

FIG. 10 is a schematic view of the oxygen-barrier fire extinguishing apparatus according to the present invention.

FIG. 11 is a schematic view of a water spray cooling device according to the present invention.

FIG. 12 is a logic block diagram of the cooling process flow for quenching the high-temperature activated carbon after the conveyor.

Reference numerals: 1: a discharge conduit; 101: a viewing port; 102: a light shield; 103: an upper dust removal air port; 104: a lower dust removal tuyere; 2: a discharge hopper; 3: a storage bin; 4: a conveyor; 5: a thermal imager; 501: cooling the protective cover; 502: a primary thermal imaging zone; 503: a secondary thermal imaging zone; 6: an oxygen-barrier fire extinguishing device; 601: an air inlet pipe; 602: an air nozzle; 603: an air valve; 7: a water spray cooling device; 701: a water inlet pipe; 702: a water mist nozzle; 703: a water valve; a1: a data processing module; a2: and a control module.

Detailed Description

The technical solution of the present invention is illustrated below, and the claimed scope of the present invention includes, but is not limited to, the following examples.

1) the resolved activated carbon is conveyed by a conveyor 4, and on the discharging section, the activated carbon in the conveyor 4 is conveyed into a discharging hopper 2 through a discharging conduit 1.

2) In the discharge guide pipe 1, the thermal imaging instrument 5 shoots the active carbon flowing through the discharge guide pipe 1 in real time to obtain a thermal imaging image.

3) And analyzing and judging whether the activated carbon flowing through the discharging guide pipe 1 has a high temperature point or not according to the thermal imaging image.

4) Activated carbon enters a discharge hopper 2 through a discharge guide pipe 1, corresponding high-temperature activated carbon is blown with oxygen-insulating fire-extinguishing gas or water mist for extinguishing and cooling treatment in the discharge hopper 2, the activated carbon entering the discharge hopper 2 is conveyed to a stock bin 3, and finally the activated carbon is distributed to units needing carbon through the stock bin 3.

Preferably, in step 3), whether the activated carbon flowing through the discharge conduit 1 has a high temperature point is judged according to the thermal imaging image analysis, specifically:

the thermal imaging instrument 5 shoots the activated carbon flowing through the discharging guide pipe 1 in real time to obtain a primary thermal imaging image. And acquiring the 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 the set target temperature T0. And 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 2). If T1 is greater than T0, the primary thermal imaging image is judged to have a suspected high temperature point, and the thermal imaging instrument 5 starts to rotate to track and shoot the activated carbon flowing through the discharge guide pipe 1, so that a secondary thermal imaging image is obtained. And acquiring a highest temperature value T1 'in the secondary thermal imaging image according to the secondary thermal imaging image, and comparing the highest temperature value T1' with a set target temperature T0. And if the T1' is less than or equal to T0, judging the suspected high temperature point as a false high temperature point, and repeating the step 2). If T1' is greater than T0, the suspected high temperature point is confirmed as the high temperature point, and step 4) is performed. Preferably, the value range of T0 is 390-425 ℃, and preferably 400-420 ℃.

Preferably, the secondary thermal imaging image is divided into n regions, the highest temperature of each region in the n regions is obtained, and the highest temperature value of the n highest temperatures is selected to be T1'. Preferably, n has a value of 1 to 20, preferably 3 to 15. The number of times of tracking shots by the thermal imaging camera 5 is 1 to 5, preferably 2 to 3.

Preferably, in step 4), the high-temperature activated carbon is sprayed with oxygen-insulating fire extinguishing gas to perform extinguishing and cooling treatment, specifically: when the activated carbon material is judged to have a high temperature point, oxygen-isolating fire extinguishing gas is sprayed on the corresponding high temperature activated carbon through the oxygen-isolating fire extinguishing device 6 arranged on the discharge hopper 2, so that the high temperature activated carbon is extinguished and cooled. Preferably, the oxygen-barrier fire extinguishing gas is nitrogen or carbon dioxide. Or

In the step 4), the water mist sprayed by the high-temperature activated carbon is extinguished and cooled, and the method specifically comprises the following steps: when the activated carbon material is judged to have a high-temperature point, water mist is sprayed to the corresponding high-temperature activated carbon through the water spray cooling device 7 arranged on the discharge hopper 2, so that the activated carbon is extinguished and cooled.

Preferably, the time when the oxygen-barrier fire extinguishing device 6 starts to blow the oxygen-barrier fire extinguishing gas or the time when the water mist cooling device 7 starts to blow the water mist is set to t 0', s. Then t 0' satisfies the following relationship:

formula I, t0 ═ t0..

Wherein t0 is the time when the thermal imaging camera 5 detects that the activated carbon in the discharge conduit 1 has a high temperature point, s. t 0' is the time when the oxygen-barrier fire-extinguishing device 6 starts blowing oxygen-barrier fire-extinguishing gas or the water mist is started to be sprayed by the water spray cooling device 7, s.

Preferably, in step 4), when the oxygen-barrier fire extinguishing device 6 is used for extinguishing and cooling the high-temperature activated carbon, the time period t1 for blowing the oxygen-barrier fire extinguishing gas by the oxygen-barrier fire extinguishing device 6 satisfies the following relational expression:

wherein: t1 is the time length s of the oxygen-isolated fire extinguishing gas sprayed by the oxygen-isolated fire extinguishing device 6 to the high-temperature activated carbon. k1 is the safety factor of oxygen-isolating fire-extinguishing treatment, and the value is 1.2-2.5, preferably 1.6-2.1. C1 is the specific heat capacity of the activated carbon, kJ/(kg-DEG C). M1 is the mass of high temperature activated carbon, kg. Δ t_cnThe temperature difference is DEG C before and after the quenching and cooling treatment of the high-temperature activated carbon. V1 is the gas flow velocity of oxygen-barrier fire-extinguishing gas blown by the oxygen-barrier fire-extinguishing device 6, m/s. S1 is the nozzle area of oxygen-isolating fire-extinguishing gas sprayed by the oxygen-isolating fire-extinguishing device 6, m². C2 is the specific heat capacity of oxygen-insulating fire-extinguishing gas, kJ/(kg-DEG C). Rho 1 is the density of oxygen-insulating fire-extinguishing gas, kg/m³。Δt_nThe temperature difference of the gas before and after the extinguishing and cooling treatment of the high-temperature activated carbon is carried out for the oxygen-isolating fire extinguishing gas, and the temperature is lower than the temperature of the gas.

Preferably, in step 4), when the water spray cooling device 7 is used for extinguishing and cooling the high-temperature activated carbon, the water spray cooling device 7 sprays water mist for a time period t2 which satisfies the following relation:

whereinAnd t2 is the time length s of the water spray cooling device 7 for spraying water mist to the high-temperature activated carbon. k2 is the safety coefficient of water spray cooling treatment, and the value is 1.2-2.5, preferably 1.6-2.1. C1 is the specific heat capacity of the activated carbon, kJ/(kg-DEG C). M1 is the mass of high temperature activated carbon, kg. Δ t_cwThe temperature difference is DEG C before and after the quenching and cooling treatment of the high-temperature activated carbon. V2 is the flow velocity of the sprayed water mist, m/s, of the water spray cooling device 7. S2 is the area of the outlet, m, of the spray water cooling device 7². ρ 2 is the density of water, kg/m³. C2 is the specific heat capacity of water at the local atmospheric pressure and water evaporation temperature, kJ/(kg. DEG C.). C3 is the local atmospheric pressure and the specific heat capacity of water at the initial temperature, kJ/(kg. DEG C.). T2 is the evaporation temperature of water at local atmospheric pressure, DEG C. T3 is the initial temperature of the sprayed water mist at the local atmospheric pressure, DEG C. h is_wIs the latent heat of vaporization of water at the local atmospheric pressure and water evaporation temperature, kJ/kg.

A system for extinguishing and cooling high-temperature activated carbon behind a conveyor comprises a discharge guide pipe 1, a discharge hopper 2, a storage bin 3 and a conveyor 4. The discharge hole of the conveyor 4 is connected with the feed inlet of the discharge guide pipe 1. The discharge hole of the discharge conduit 1 is connected with the feed inlet of the discharge hopper 2. The discharge hole of the discharge hopper 2 is connected with the feed inlet of the feed bin 3. The discharging guide pipe 1 is provided with a thermal imaging camera 5. And an oxygen-isolating fire extinguishing device 6 or a water spray cooling device 7 is arranged on the discharge hopper 2.

Preferably, a viewing port 101 is opened in an upper side wall of the discharge duct 1. A light shield 102 is provided on the observation port 101. The thermal imager 5 is disposed on top of the light shield 102. The thermal imaging camera 5 shoots the material entering the discharging guide pipe 1 in real time through the observation port 101 to obtain a thermal imaging image.

Preferably, the discharge conduit 1 comprises an inclined section and a vertical section, and the material entering the discharge conduit 1 passes through the inclined section and the vertical section of the discharge conduit 1 in sequence. Said viewing port 101 is arranged on the inclined section of the discharge conduit 1. The top surface of the light shield 102 is arranged parallel to the axis of the inclined section of the discharge conduit 1. Preferably, the discharge duct 1 is provided at one side of the upper portion of the discharge hopper 2.

Preferably, the oxygen-barrier fire extinguishing device 6 comprises an air inlet pipe 601, an air nozzle 602 and an air valve 603. The air inlet pipe 601 is arranged on the discharge hopper 2. Said air nozzle 602 is arranged at the upper inlet of the discharge hopper 2, on the side opposite to the discharge conduit 1. The air inlet pipe 601 penetrates through the outer wall of the discharge hopper 2 and is connected with the air nozzle 602. The gas valve 603 is arranged on the air inlet pipe 601. Preferably, the blowing direction of the air nozzles 602 is parallel to the side wall of the discharge hopper 2 on the side where the air nozzles 602 are located. Or

The water spray cooling device 7 comprises a water inlet pipe 701, a water spray nozzle 702 and a water valve 703. The inlet pipe 701 is disposed outside the discharge hopper 2. The water mist nozzle 702 is arranged at the top of the discharge hopper 2 and is positioned at one side close to the discharge conduit 1. The nozzle end of the water mist nozzle 702 penetrates through the top of the discharge hopper 2 and extends into the feed inlet of the discharge hopper 2. The water inlet end of the water mist nozzle 702 is communicated with the water inlet pipe 701. The water valve 703 is disposed on the water inlet pipe 701. Preferably, the spraying direction of the water mist nozzles 702 is perpendicular to the side wall of the discharge hopper 2 on the side where the water mist nozzles 702 are located.

Preferably, a cooling protective cover 501 is further provided outside the thermal imaging camera 5. A cooling protective cover 501 is provided on the top surface of the light shield 102 and covers the thermal imaging camera 5. Preferably, the thermal imaging camera 5 rotates within the cooling protective cover 501, so as to photograph and track the material entering the discharge pipe 1.

Preferably, an upper dust removal air port 103 and a lower dust removal air port 104 are further arranged on the upper side wall of the inclined section of the discharge conduit 1. Wherein, the upper dust removal air opening 103 is positioned at the upstream of the light shield 102. The lower dust removal tuyere 104 is located downstream of the light shield 102.

Preferably, the conveyor 4 is a bucket conveyor.

Preferably, the system further comprises a data processing module A1 and a control module A2. The data processing module A1 is connected with the control module A2, and the air valve 603 or the water valve 703 is connected with the control module A2. When the activated carbon flowing through the discharging guide pipe 1 is analyzed and judged to have a high-temperature point according to the thermal imaging image, the data processing module A1 gives an alarm to the control module A2, and the control module A2 controls the operation of the air valve 603 or the water valve 703 to realize oxygen-isolating fire extinguishing treatment or water spraying cooling treatment on the high-temperature activated carbon.

Example 1

As shown in fig. 4, 5 and 10, the system for the high-temperature activated carbon quenching and cooling treatment after the conveyor comprises a discharge conduit 1, a discharge hopper 2, a storage bin 3 and a conveyor 4. The discharge hole of the conveyor 4 is connected with the feed inlet of the discharge guide pipe 1. The discharge hole of the discharge conduit 1 is connected with the feed inlet of the discharge hopper 2. The discharge hole of the discharge hopper 2 is connected with the feed inlet of the feed bin 3. The discharging guide pipe 1 is provided with a thermal imaging camera 5. And an oxygen-isolating fire extinguishing device 6 is arranged on the discharge hopper 2.

Example 2

As shown in fig. 11, the embodiment 1 is repeated except that the oxygen-barrier fire-extinguishing device 6 on the discharge hopper 2 is replaced with a water-spray cooling device 7.

Example 3

As shown in fig. 5 to 7, example 2 was repeated except that a viewing port 101 was provided in the upper side wall of the discharge duct 1. A light shield 102 is provided on the observation port 101. The thermal imager 5 is disposed on top of the light shield 102. The thermal imaging camera 5 shoots the material entering the discharging guide pipe 1 in real time through the observation port 101 to obtain a thermal imaging image.

Example 4

Example 3 is repeated except that the discharge conduit 1 comprises an inclined section and a vertical section, and the material entering the discharge conduit 1 passes through the inclined section and the vertical section of the discharge conduit 1 in sequence. Said viewing port 101 is arranged on the inclined section of the discharge conduit 1. The top surface of the light shield 102 is arranged parallel to the axis of the inclined section of the discharge conduit 1. The discharge conduit 1 is arranged at one side of the upper part of the discharge hopper 2.

Example 5

As shown in fig. 10, embodiment 1 is repeated except that the oxygen-barrier fire extinguishing apparatus 6 includes an intake pipe 601, an air nozzle 602, and a gas valve 603. The air inlet pipe 601 is arranged on the discharge hopper 2. Said air nozzle 602 is arranged at the upper inlet of the discharge hopper 2, on the side opposite to the discharge conduit 1. The air inlet pipe 601 penetrates through the outer wall of the discharge hopper 2 and is connected with the air nozzle 602. The gas valve 603 is arranged on the air inlet pipe 601. The blowing direction of the air nozzles 602 is parallel to the side wall of the discharge hopper 2 on the side where the air nozzles 602 are located.

Example 6

As shown in fig. 11, embodiment 4 is repeated except that the spray cooling device 7 comprises a water inlet pipe 701, a mist nozzle 702 and a water valve 703. The inlet pipe 701 is disposed outside the discharge hopper 2. The water mist nozzle 702 is arranged at the top of the discharge hopper 2 and is positioned at one side close to the discharge conduit 1. The nozzle end of the water mist nozzle 702 penetrates through the top of the discharge hopper 2 and extends into the feed inlet of the discharge hopper 2. The water inlet end of the water mist nozzle 702 is communicated with the water inlet pipe 701. The water valve 703 is disposed on the water inlet pipe 701. The spraying direction of the water mist nozzle 702 is vertical to the side wall of the discharge hopper 2 at the side where the water mist nozzle 702 is positioned.

Example 7

As shown in fig. 5 to 7, embodiment 6 is repeated except that a cooling protective cover 501 is further provided outside the thermal imaging camera 5. A cooling protective cover 501 is provided on the top surface of the light shield 102 and covers the thermal imaging camera 5. The thermal imaging camera 5 rotates in the cooling protective cover 501, so that the materials entering the discharging guide pipe 1 are shot and tracked.

Example 8

Example 7 was repeated except that the upper side wall of the inclined section of the discharge duct 1 was further provided with an upper dust-removing tuyere 103 and a lower dust-removing tuyere 104. Wherein, the upper dust removal air opening 103 is positioned at the upstream of the light shield 102. The lower dust removal tuyere 104 is located downstream of the light shield 102.

Example 9

Example 8 was repeated except that the conveyor 4 was a bucket conveyor.

Example 10

As shown in FIG. 8, example 5 is repeated except that the system further includes a data processing module A1 and a control module A2. The data processing module A1 is connected with the control module A2, and the gas valve 603 is connected with the control module A2. When the activated carbon flowing through the discharging conduit 1 is analyzed and judged to have a high-temperature point according to the thermal imaging image, the data processing module A1 gives an alarm to the control module A2, and the control module A2 realizes oxygen-isolating fire extinguishing treatment on the high-temperature activated carbon by controlling the operation of the air valve 603.

Example 11

As shown in FIG. 8, example 9 is repeated except that the system further includes a data processing module A1 and a control module A2. The data processing module A1 is connected with the control module A2, and the water valve 703 is connected with the control module A2. When the activated carbon flowing through the discharging conduit 1 is judged to have a high temperature point according to the thermal imaging image analysis, the data processing module A1 gives an alarm to the control module A2, and the control module A2 realizes the water spray cooling treatment on the high temperature activated carbon by controlling the operation of the water valve 703.

Example 12

4) Activated carbon enters a discharge hopper 2 through a discharge guide pipe 1, corresponding high-temperature activated carbon is sprayed with oxygen-isolating fire extinguishing gas in the discharge hopper 2 to be extinguished and cooled, the activated carbon entering the discharge hopper 2 is conveyed to a storage bin 3, and finally the activated carbon is distributed to carbon-requiring units through the storage bin 3.

Example 13

Example 12 is repeated except that the extinguishing and cooling treatment of the corresponding high-temperature activated carbon by blowing oxygen-insulating fire-extinguishing gas is replaced by the extinguishing and cooling treatment of the corresponding high-temperature activated carbon by blowing water mist.

Example 14

Example 13 is repeated except that in step 3), it is judged whether the activated carbon flowing through the discharge conduit 1 has a high temperature point according to the thermal imaging image analysis, specifically:

the thermal imaging instrument 5 shoots the activated carbon flowing through the discharging guide pipe 1 in real time to obtain a primary thermal imaging image. And acquiring the 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 the set target temperature T0. And 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 2). If T1 is greater than T0, the primary thermal imaging image is judged to have a suspected high temperature point, and the thermal imaging instrument 5 starts to rotate to track and shoot the activated carbon flowing through the discharge guide pipe 1, so that a secondary thermal imaging image is obtained. And acquiring a highest temperature value T1 'in the secondary thermal imaging image according to the secondary thermal imaging image, and comparing the highest temperature value T1' with a set target temperature T0. And if the T1' is less than or equal to T0, judging the suspected high temperature point as a false high temperature point, and repeating the step 2). If T1' is greater than T0, the suspected high temperature point is confirmed as the high temperature point, and step 4) is performed. Preferably, T0 is 420 ℃.

Dividing all the secondary thermal imaging images into 9 areas, obtaining the highest temperature of each of the 9 areas, and selecting the highest temperature value of the 9 highest temperatures as T1'. The number of times of tracking shots by the thermal imaging camera 5 is 2.

Example 15

Example 12 is repeated except that in step 4), the high-temperature activated carbon is sprayed with oxygen-insulating fire extinguishing gas to perform extinguishing and cooling treatment, specifically: when the activated carbon material is judged to have a high temperature point, oxygen-isolating fire extinguishing gas is sprayed on the corresponding high temperature activated carbon through the oxygen-isolating fire extinguishing device 6 arranged on the discharge hopper 2, so that the high temperature activated carbon is extinguished and cooled. The oxygen-isolating fire extinguishing gas is nitrogen.

Example 16

Example 15 was repeated except that the time at which the oxygen-barrier fire extinguishing apparatus 6 started blowing the oxygen-barrier fire extinguishing gas was set to t 0', s. Then t 0' satisfies the following relationship:

formula I, t0 ═ t0..

Wherein t0 is the time when the thermal imaging camera 5 detects that the activated carbon in the discharge conduit 1 has a high temperature point, s. t 0' is the time, s, when the oxygen barrier fire extinguishing device 6 starts blowing the oxygen barrier fire extinguishing gas.

Example 17

Example 16 is repeated except that in step 4), when the oxygen-barrier fire extinguishing device 6 is used for extinguishing and cooling the high-temperature activated carbon, the time t1 for blowing the oxygen-barrier fire extinguishing gas by the oxygen-barrier fire extinguishing device 6 meets the following relational expression:

wherein: t1 is the time length s of the oxygen-isolated fire extinguishing gas sprayed by the oxygen-isolated fire extinguishing device 6 to the high-temperature activated carbon. k1 is the oxygen-insulating fire-extinguishing treatment safety coefficient, and the value is 1.9. C1 is the specific heat capacity of the activated carbon, kJ/(kg-DEG C). M1 is the mass of high temperature activated carbon, kg. Δ t_cnThe temperature difference is DEG C before and after the quenching and cooling treatment of the high-temperature activated carbon. V1 is the gas flow velocity of oxygen-barrier fire-extinguishing gas blown by the oxygen-barrier fire-extinguishing device 6, m/s. S1 is the nozzle area of oxygen-isolating fire-extinguishing gas sprayed by the oxygen-isolating fire-extinguishing device 6, m². C2 is the specific heat capacity of oxygen-insulating fire-extinguishing gas, kJ/(kg-DEG C). Rho 1 is the density of oxygen-insulating fire-extinguishing gas, kg/m³。Δt_nThe temperature difference of the gas before and after the extinguishing and cooling treatment of the high-temperature activated carbon is carried out for the oxygen-isolating fire extinguishing gas, and the temperature is lower than the temperature of the gas.

Example 18

Example 14 is repeated, except that in step 4), the water mist is sprayed to the high-temperature activated carbon for quenching and cooling treatment, specifically: when the activated carbon material is judged to have a high-temperature point, water mist is sprayed to the corresponding high-temperature activated carbon through the water spray cooling device 7 arranged on the discharge hopper 2, so that the activated carbon is extinguished and cooled.

Example 19

Example 18 was repeated except that the time at which the water mist blowing of the water jet cooling device 7 was started was set to t 0', s. Then t 0' satisfies the following relationship:

formula I, t0 ═ t0..

Wherein t0 is the time when the thermal imaging camera 5 detects that the activated carbon in the discharge conduit 1 has a high temperature point, s. t 0' is the time s when the water mist starts to be blown by the water jet cooling device 7.

Example 20

Example 19 is repeated except that in step 4), when the water spray cooling device 7 is used for extinguishing and cooling the high-temperature activated carbon, the water spray cooling device 7 sprays water mist for a time period t2 which satisfies the following relation:

wherein t2 is the time length s of the water spray cooling device 7 spraying water mist to the high-temperature activated carbon. k2 is the safety coefficient of water spray cooling treatment, and the value is 1.5. C1 is the specific heat capacity of the activated carbon, kJ/(kg-DEG C). M1 is the mass of high temperature activated carbon, kg. Δ t_cwThe temperature difference is DEG C before and after the quenching and cooling treatment of the high-temperature activated carbon. V2 is the flow velocity of the sprayed water mist, m/s, of the water spray cooling device 7. S2 is the area of the outlet, m, of the spray water cooling device 7². ρ 2 is the density of water, kg/m³. C2 is the specific heat capacity of water at the local atmospheric pressure and water evaporation temperature, kJ/(kg. DEG C.). C3 is the local atmospheric pressure and the specific heat capacity of water at the initial temperature, kJ/(kg. DEG C.). T2 is the evaporation temperature of water at local atmospheric pressure, DEG C. T3 is the initial temperature of the sprayed water mist at the local atmospheric pressure, DEG C. h is_wIs the latent heat of vaporization of water at the local atmospheric pressure and water evaporation temperature, kJ/kg.

Application example 1

In the discharge guide pipe 1, a thermal imaging instrument 5 carries out first real-time shooting on the activated carbon in a primary thermal imaging area flowing through the discharge guide pipe 1 in a convection manner to obtain a primary thermal imaging image. According to the primary thermal imaging image, the highest temperature value T1 in the primary thermal imaging image is obtained to be 224 ℃, and the highest temperature value T1 is compared with the set target temperature T0. T0 has a value of 420 ℃. Since T1 < T0, the thermographic image was judged not to have a high temperature point. The thermal imaging instrument 5 continues to perform a new round of real-time shooting on the activated carbon flowing through the discharging guide pipe 1 to obtain a new thermal imaging image, and continuously monitors the activated carbon particles.

Application example 2

In the discharge guide pipe 1, the thermal imaging instrument 5 carries out one-time real-time shooting on the activated carbon in a one-time thermal imaging area flowing through the discharge guide pipe 1 in a convection manner to obtain a one-time thermal imaging image. According to the primary thermal imaging image, the highest temperature value T1 in the primary thermal imaging image is obtained to be 430 ℃, and the highest temperature value T1 is compared with the set target temperature T0. T0 has a value of 420 ℃. Since T1 > T0, the thermographic image is judged to have a suspected high temperature point.

The thermal imaging instrument 5 carries out secondary real-time shooting on the activated carbon in a secondary thermal imaging area flowing through the discharge guide pipe 1 to obtain a secondary thermal imaging image. According to the secondary thermal imaging image, dividing the secondary thermal imaging image into nine-grid squares, obtaining the highest temperature of each of 9 areas, selecting the highest temperature value T1 'of the 9 highest temperatures as 406 ℃, and comparing the highest temperature value T1' with a set target temperature T0. T0 has a value of 420 ℃. Since T1' < T0, the thermographic image was judged not to have a high temperature point. The thermal imaging instrument 5 continues to perform a new round of real-time shooting on the activated carbon flowing through the discharging guide pipe 1 to obtain a new thermal imaging image, and continuously monitors the activated carbon particles.

Application example 3

In the discharge guide pipe 1, a thermal imaging instrument 5 carries out first real-time shooting on the activated carbon in a primary thermal imaging area flowing through the discharge guide pipe 1 in a convection manner to obtain a primary thermal imaging image. According to the primary thermal imaging image, the highest temperature value T1 in the primary thermal imaging image is obtained to be 438 ℃, and the highest temperature value T1 is compared with the set target temperature T0. T0 has a value of 420 ℃. Since T1 > T0, the thermographic image is judged to have a suspected high temperature point.

The thermal imaging instrument 5 carries out secondary real-time shooting on the activated carbon in a secondary thermal imaging area flowing through the discharge guide pipe 1 to obtain a secondary thermal imaging image. According to the secondary thermal imaging image, dividing the secondary thermal imaging image into nine-grid squares, obtaining the highest temperature of each of 9 areas, selecting the highest temperature value T1 'of the 9 highest temperatures to be 436 ℃, and comparing the highest temperature value T1' with the set target temperature T0. T0 has a value of 420 ℃. Since T1' > T0, the thermographic image was judged to have a high temperature point.

When the moment of detecting the high temperature point is the 50 th time of the system operation, the oxygen-isolating fire extinguishing device 6 starts to spray nitrogen into the discharging hopper 2 in the 50 th time of the system operation; calculating the blowing time t1 of the nitrogen according to the formula II:

wherein k1 is the oxygen-insulating fire-extinguishing treatment safety coefficient, and the value is 1.6. C1 is the specific heat capacity of the activated carbon, and the value is 0.84 kJ/(kg-DEG C). M1 is the mass of the high temperature activated carbon, and the value is 10 kg. Δ t_cnThe temperature difference of the activated carbon before and after oxygen-isolated fire extinguishing treatment is 46 ℃. V1 is the gas flow velocity of nitrogen gas blown by the oxygen-barrier fire extinguishing device 6, and the value is 100 m/s. S1 is the area of the nozzle of the oxygen-isolating fire extinguishing device 6 for blowing nitrogen, and the numerical value is 0.021m². C2 is the specific heat capacity of nitrogen and has a value of 1.30 kJ/(kg. DEG C.). ρ 1 is the density of nitrogen and is 1.25kg/m³。Δt_nThe gas temperature difference before and after the oxygen-isolating fire-extinguishing treatment of the high-temperature activated carbon is carried out by nitrogen, and the value is 32 ℃. The fire extinguishing gas is nitrogen, the nozzles are 7 double-sided air knives, the length is 0.5m, and the hole width is 3 mm.

Application example 4

In the discharge guide pipe 1, a thermal imaging instrument 5 carries out first real-time shooting on the activated carbon in a primary thermal imaging area flowing through the discharge guide pipe 1 in a convection manner to obtain a primary thermal imaging image. And acquiring a highest temperature value T1 in the primary thermal imaging image as 434 ℃ according to the primary thermal imaging image, and comparing the highest temperature value T1 with a set target temperature T0. T0 has a value of 420 ℃. Since T1 > T0, the thermographic image is judged to have a suspected high temperature point.

The thermal imaging instrument 5 carries out secondary real-time shooting on the activated carbon in a secondary thermal imaging area flowing through the discharge guide pipe 1 to obtain a secondary thermal imaging image. According to the secondary thermal imaging image, dividing the secondary thermal imaging image into nine-grid squares, obtaining the highest temperature of each of 9 areas, selecting the highest temperature value T1 'of the 9 highest temperatures as 430 ℃, and comparing the highest temperature value T1' with a set target temperature T0. T0 has a value of 420 ℃. Since T1' > T0, the thermographic image was judged to have a high temperature point.

When the moment of detecting the high temperature point is 33s of system operation, the water spray cooling device 7 starts to spray water mist into the discharge hopper 2 in the 33s of system operation; calculating the spraying time t2 of the water mist according to the formula III:

wherein k2 is the water spray cooling treatment safety coefficient, and the value is 1.3. C1 is the specific heat capacity of the activated carbon, and the value is 0.84 kJ/(kg-DEG C). M1 is the mass of the high temperature activated carbon, and the value is 20 kg. Δ t_cwThe temperature difference of the activated carbon before and after the water spray cooling treatment is 70 ℃. V2 is the flow velocity of the water mist sprayed by the water spray cooling device 7, and the value is 9 m/s. S2 is the nozzle area of the water sprayed by the water spray cooling device 7, and the numerical value is 1.77 multiplied by 10^-5m². ρ 2 is the density of water and has a value of 999.7kg/m³. C2 is the specific heat capacity of water at the local atmospheric pressure and water evaporation temperature, and has a value of 4.22 kJ/(kg. DEG C.). C3 is the specific heat capacity of water at the local atmospheric pressure and initial temperature, and has a value of 4.191 kJ/(kg. deg.C). T2 is the water evaporation temperature at local atmospheric pressure, and has a value of 100 ℃. T3 is the initial temperature of the water mist blown at local atmospheric pressure, with a value of 18 ℃. h is_wThe latent heat of vaporization of water at the local atmospheric pressure and water evaporation temperature is 2256.6 kJ/kg. The nozzles are 10 atomizing nozzles, and the diameter of the spray hole is 1.5 mm.

Claims

1. A method for quenching and cooling treatment of high-temperature activated carbon after a conveyor is characterized by comprising the following steps: the method comprises the following steps:

1) the analyzed activated carbon is conveyed by a conveyor (4), and on the discharging section, the activated carbon in the conveyor (4) is conveyed into a discharging hopper (2) through a discharging guide pipe (1);

2) in the discharging guide pipe (1), a thermal imaging instrument (5) shoots the active carbon flowing through the discharging guide pipe (1) in real time to obtain a thermal imaging image;

3) analyzing and judging whether the activated carbon flowing through the discharging guide pipe (1) has a high-temperature point or not according to the thermal imaging image;

3a) if the thermal imaging image does not have the high temperature point, repeating the step 2);

3b) if the thermal imaging image is judged to have the high temperature point, performing the step 4);

4) the active carbon enters the discharge hopper (2) through the discharge guide pipe (1), corresponding high-temperature active carbon is sprayed with oxygen-isolating fire extinguishing gas or water mist for extinguishing and cooling treatment in the discharge hopper (2), the active carbon entering the discharge hopper (2) is conveyed to the stock bin (3), and finally the active carbon is distributed to the units needing carbon through the stock bin (3).

2. The method of claim 1, wherein: in the step 3), whether the activated carbon flowing through the discharging guide pipe (1) 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 (5) shoots the activated carbon flowing through the discharging guide pipe (1) in real time to obtain a primary thermal imaging image; 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 2); if T1 is larger than T0, the primary thermal imaging image is judged to have a suspected high temperature point, and the thermal imaging instrument (5) starts to rotate to track and shoot the activated carbon flowing through the discharging guide pipe (1) to obtain a secondary thermal imaging image; acquiring a highest temperature value T1 'in the secondary thermal imaging image according to the secondary 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 the suspected high temperature point as a false high temperature point, and repeating the step 2); if T1' is more than T0, confirming that the suspected high temperature point is the high temperature point, and performing the step 4); preferably, the value range of T0 is 390-425 ℃, and preferably 400-420 ℃;

preferably, the secondary thermal imaging image is divided into n areas, the highest temperature of each of the n areas is obtained, and the highest temperature value of the n highest temperatures is selected to be T1'; preferably, n is 1-20, preferably 3-15; the number of tracking shots of the thermal imaging camera (5) is 1-5, preferably 2-3.

3. The method according to claim 1 or 2, characterized in that: in the step 4), the high-temperature activated carbon is sprayed with oxygen-insulating fire extinguishing gas for extinguishing and cooling treatment, which specifically comprises the following steps: when the activated carbon material is judged to have a high-temperature point, oxygen-isolating fire extinguishing gas is sprayed on the corresponding high-temperature activated carbon through an oxygen-isolating fire extinguishing device (6) arranged on the discharge hopper (2), so that the high-temperature activated carbon is extinguished and cooled; preferably, the oxygen-insulating fire extinguishing gas is nitrogen or carbon dioxide; or

In the step 4), the water mist sprayed by the high-temperature activated carbon is extinguished and cooled, and the method specifically comprises the following steps: when the activated carbon material is judged to have a high-temperature point, water mist is sprayed to the corresponding high-temperature activated carbon through a water spraying cooling device (7) arranged on the discharge hopper (2), so that the activated carbon is extinguished and cooled.

4. The method of claim 3, wherein: setting the moment when the oxygen-isolating fire extinguishing device (6) starts to spray oxygen-isolating fire extinguishing gas or the moment when the water spray cooling device (7) starts to spray water mist as t 0's; then t 0' satisfies the following relationship:

t0 ═ t0... formula I;

wherein t0 is the time when the thermal imaging instrument (5) detects that the activated carbon in the discharge guide pipe (1) has a high temperature point, s; t 0' is the time when the oxygen-barrier fire-extinguishing device (6) starts to spray oxygen-barrier fire-extinguishing gas or the water spray cooling device (7) starts to spray water mist, s.

5. The method according to claim 3 or 4, characterized in that: in the step 4), when the oxygen-isolating fire extinguishing device (6) is used for extinguishing and cooling the high-temperature activated carbon, the time t1 for blowing oxygen-isolating fire extinguishing gas by the oxygen-isolating fire extinguishing device (6) meets the following relational expression:

wherein: t1 is the time length s of the oxygen-isolating fire extinguishing device (6) for blowing oxygen-isolating fire extinguishing gas to the high-temperature activated carbon; k1 is the safety factor of oxygen-isolating fire-extinguishing treatment, and the value is 1.2-2.5, preferably 1.6-2.1; c1 is the specific heat capacity of activated carbon, kJ/(kg. DEG C); m1 is the mass of high-temperature activated carbon, kg; Δ t_cnThe temperature difference is DEG C before and after the high-temperature activated carbon is quenched and cooled; v1 is the gas flow velocity of oxygen-isolating fire extinguishing gas sprayed by the oxygen-isolating fire extinguishing device (6), m/s; s1 is the area of the nozzle of oxygen-isolating fire-extinguishing gas sprayed by the oxygen-isolating fire-extinguishing device (6), m²(ii) a C2 is the specific heat capacity of oxygen-insulating fire-extinguishing gas, kJ/(kg DEG C); rho 1 is the density of oxygen-insulating fire-extinguishing gas, kg/m³；Δt_nThe temperature difference of the gas before and after the extinguishing and cooling treatment of the high-temperature activated carbon is carried out for the oxygen-isolating fire extinguishing gas, and the temperature is lower than the temperature of the gas.

6. The method according to claim 3 or 4, characterized in that: in the step 4), when the water spray cooling device (7) is used for extinguishing and cooling the high-temperature activated carbon, the time length t2 for spraying water mist by the water spray cooling device (7) satisfies the following relational expression:

wherein t2 is the time length s for the water spray cooling device (7) to spray water mist on the high-temperature activated carbon; k2 is the safety coefficient of water spray cooling treatment, and the value is 1.2-2.5, preferably 1.6-2.1; c1 is the specific heat capacity of activated carbon, kJ/(kg. DEG C); m1 is the mass of high-temperature activated carbon, kg; Δ t_cwThe temperature difference is DEG C before and after the high-temperature activated carbon is quenched and cooled; v2 is the flow velocity of the water mist sprayed by the water spray cooling device (7), m/s; s2 is the area of the outlet of the water spray cooling device (7) for spraying water mist, m²(ii) a ρ 2 is the density of water, kg/m³(ii) a C2 is the specific heat capacity of water under the local atmospheric pressure and the water evaporation temperature, kJ/(kg. DEG C); c3 is the local atmospheric pressure and the specific heat capacity of water at the initial temperature, kJ/(kg. DEG C); t2 is the evaporation temperature of water at local atmospheric pressure, DEG C; t3 is the initial temperature of the sprayed water mist under the local atmospheric pressure, DEG C; h is_wIs the latent heat of vaporization of water at the local atmospheric pressure and water evaporation temperature, kJ/kg.

7. A system for post-conveyor high temperature activated carbon quenching cooling treatment or a system for post-conveyor high temperature activated carbon quenching cooling treatment for the method of any one of claims 1 to 6, the system comprising a discharge conduit (1), a discharge hopper (2), a silo (3) and a conveyor (4); the discharge hole of the conveyor (4) is connected with the feed inlet of the discharge guide pipe (1); the discharge hole of the discharge conduit (1) is connected with the feed inlet of the discharge hopper (2); the discharge hole of the discharge hopper (2) is connected with the feed inlet of the storage bin (3); the method is characterized in that: a thermal imager (5) is arranged on the discharging guide pipe (1); an oxygen-isolating fire-extinguishing device (6) or a water-spraying cooling device (7) is arranged on the discharge hopper (2).

8. The system of claim 7, wherein: an observation port (101) is arranged on the upper side wall of the discharging guide pipe (1); a light shield (102) is arranged on the observation port (101); the thermal imaging camera (5) is arranged on the top of the light shield (102); the thermal imaging instrument (5) shoots the material entering the discharging guide pipe (1) in real time through the observation port (101) to obtain a thermal imaging image;

preferably, the discharge conduit (1) comprises an inclined section and a vertical section, and the materials entering the discharge conduit (1) sequentially pass through the inclined section and the vertical section of the discharge conduit (1); the observation opening (101) is arranged on the inclined section of the discharge conduit (1); the top surface of the light shield (102) is arranged in parallel with the axis of the inclined section of the discharge conduit (1); preferably, the discharge conduit (1) is arranged at one side of the upper part of the discharge hopper (2).

9. The system of claim 8, wherein: the oxygen-isolating fire extinguishing device (6) comprises an air inlet pipe (601), an air nozzle (602) and an air valve (603); the air inlet pipe (601) is arranged on the discharge hopper (2); the air nozzle (602) is arranged at the inlet of the upper part of the discharge hopper (2) and is positioned at one side opposite to the discharge conduit (1); the air inlet pipe (601) penetrates through the outer wall of the discharge hopper (2) and is connected with the air nozzle (602); the air valve (603) is arranged on the air inlet pipe (601); preferably, the blowing direction of the air nozzle (602) is parallel to the side wall of the discharge hopper (2) at the side where the air nozzle (602) is located; or

The water spray cooling device (7) comprises a water inlet pipe (701), a water spray nozzle (702) and a water valve (703); the water inlet pipe (701) is arranged outside the discharge hopper (2); the water mist nozzle (702) is arranged at the top of the discharge hopper (2) and is positioned at one side close to the discharge conduit (1); the nozzle end of the water mist nozzle (702) penetrates through the top of the discharge hopper (2) and extends into the feed inlet of the discharge hopper (2); the water inlet end of the water spray nozzle (702) is communicated with the water inlet pipe (701); the water valve (703) is arranged on the water inlet pipe (701); preferably, the spraying direction of the water mist nozzle (702) is vertical to the side wall of the discharge hopper (2) at the side where the water mist nozzle (702) is located.

10. The system according to claim 8 or 9, characterized in that: a cooling protective cover (501) is arranged outside the thermal imaging camera (5); a cooling protective cover (501) is arranged on the top surface of the light shield (102) and covers the thermal imaging camera (5); preferably, the thermal imaging camera (5) rotates in the cooling protective cover (501) so as to shoot and track and shoot the material entering the discharging guide pipe (1); and/or

An upper dust removal air port (103) and a lower dust removal air port (104) are also arranged on the upper side wall of the inclined section of the discharging guide pipe (1); wherein, the upper dust removal air port (103) is positioned at the upstream of the light shield (102); the lower dust removal air port (104) is positioned at the downstream of the light shield (102); and/or

The conveyor (4) is a bucket chain conveyor.

11. The system according to any one of claims 7-10, wherein: the system further comprises a data processing module (a1) and a control module (a 2); the data processing module (A1) is connected with the control module (A2), and the air valve (603) or the water valve (703) is connected with the control module (A2); when the activated carbon flowing through the discharging guide pipe (1) is judged to have a high-temperature point according to the thermal imaging image analysis, the data processing module (A1) gives an alarm to the control module (A2), and the control module (A2) controls the operation of the air valve (603) or the water valve (703) to realize oxygen-isolating fire extinguishing treatment or water spraying cooling treatment on the high-temperature activated carbon.