CN112858384B

CN112858384B - High-temperature detection-cooling treatment method and system for activated carbon flue gas purification device

Info

Publication number: CN112858384B
Application number: CN202110026317.2A
Authority: CN
Inventors: 刘雁飞; 陈红; 刘昌齐
Original assignee: Hunan Zhongye Changtian Energy Conservation And Environmental Protection Technology Co ltd; Zhongye Changtian International Engineering Co Ltd
Current assignee: Hunan Zhongye Changtian Energy Conservation And Environmental Protection Technology Co ltd; Zhongye Changtian International Engineering Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2023-06-23
Anticipated expiration: 2041-01-08
Also published as: CN112858384A

Abstract

A high-temperature detection-cooling treatment method and system for an activated carbon flue gas purification device comprises the following steps: 1) Acquiring a material thermal imaging image of a material on a material conveying line in real time, and calling the material thermal imaging image of the material entering a first position area as a preliminary screening thermal imaging image; 2) Identifying a high temperature point of the preliminary screening thermal imaging image, and recording the discovery position of the Gao Wendian on a material conveying line; 3) And when the material of the high-temperature point marked with the finding position on the material conveying line moves to the processing position, cooling the material of the high-temperature point. According to the technical scheme, through the identification of the high temperature point, the material containing the high temperature point is precisely cooled, so that the production safety of the material transportation line can be effectively protected, and meanwhile, the safety maintenance cost is reduced, and the cost of preventing risks is reduced for enterprises.

Description

High-temperature detection-cooling treatment method and system for activated carbon flue gas purification device

Technical Field

The invention relates to a high-temperature detection-cooling treatment method of an activated carbon smoke purification device, in particular to a high-temperature detection-cooling treatment method of an activated carbon smoke purification device, belonging to the technical field of sintering smoke purification; the invention also relates to a high-temperature detection-cooling treatment system of the activated carbon flue gas purification device.

Background

The flue gas produced in the sintering process accounts for about 70% of the total steel flow, and the main pollutant components in the sintering flue gas are dust and SO ₂ 、NO _X The method comprises the steps of carrying out a first treatment on the surface of the In addition, small amounts of VOCs, dioxins, heavy metals, and the like; can be discharged after purification treatment. At present, the technology of treating sintering flue gas by an active carbon desulfurization and denitrification device is mature, and the technology is popularized and used at home, so that a good effect is achieved.

The working schematic diagram of the active carbon desulfurization and denitrification device in the prior art is shown in fig. 7; raw flue gas (the main component of pollutant is SO) generated in sintering process ₂ ) The purified flue gas is discharged after passing through an active carbon bed layer of the adsorption tower; adsorbing pollutants in the flue gas (the main component of the pollutants is SO) ₂ ) The activated carbon is sent into an analysis tower through an activated carbon conveyor S1, the activated carbon with the pollutants adsorbed 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 preparation process, the activated carbon after the analysis and activation is cooled to 110-130 ℃ and then is discharged out of the analysis tower, activated carbon dust is sieved through a vibrating screen, and the screened activated carbon particles enter the adsorption tower again through an activated carbon conveyor S2; additional fresh activated carbon is added to the conveyor S1 (activated carbon used in the activated carbon flue gas cleaning device is cylindrical activated carbon particles, typically 9mm in diameter and 11mm in height).

As shown in fig. 7, the activated carbon is heated to 400-430 ℃ in the analytic tower, and the ignition temperature of the activated carbon used by the activated carbon flue gas purification device is 420 ℃; the column was of airtight construction and filled with nitrogen. The structural schematic diagram of the analytical tower is shown in fig. 8: the active carbon is not contacted with air in the analytic tower so as to ensure that the active carbon is not burnt in the analytic tower; in the process of analyzing, heating and cooling the activated carbon in the analyzing tower, occasionally, the situation that a small amount of heated activated carbon particles cannot be 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 analyzing tower (the activated carbon particles filled in the analyzing tower of the sintering flue gas purifying device exceeds hundred tons, and the processes of flowing, cooling, heating, heat conduction and the like of the activated carbon particles in the analyzing tower are complex) occurs. The high-temperature activated carbon particles are discharged from the analytic tower and then contact with air, spontaneous combustion (smoldering and flameless) can occur, a small amount of spontaneous combustion high-temperature activated carbon particles possibly ignite low-temperature activated carbon particles around the high-temperature activated carbon particles, and the spontaneous combustion high-temperature activated carbon particles can enter each link of the flue gas purification device along with the activated carbon circulation to threaten the safe and stable operation of the sintering activated carbon flue gas purification system, so the sintering activated carbon flue gas purification device has the requirements for detecting and disposing the high Wen Ziran activated carbon particles. As shown in fig. 7, the sintering activated carbon flue gas purification device circulates between the desorption tower and the adsorption tower, and each link of the desorption tower, the adsorption tower, the conveyor, the vibrating screen, the buffer bin and the like is of an airtight structure, if the activated carbon material is spontaneously combusted in the sintering activated carbon flue gas purification device, a great production safety accident can be caused.

Therefore, how to provide a high-temperature detection-cooling treatment method for an activated carbon flue gas purification device can effectively protect the production safety of a material transportation line and reduce the safety maintenance cost, so that the cost of preventing risks is reduced for enterprises, and the method is a technical problem to be solved by the technicians in the field.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to accurately cool down the materials containing the high temperature points through identifying the high temperature points, and can effectively protect the production safety of the material transportation line and simultaneously reduce the safety maintenance cost, thereby reducing the cost of preventing risks for enterprises. The invention provides a high-temperature detection-cooling treatment method of an activated carbon flue gas purification device, which comprises the following steps: 1) Acquiring a material thermal imaging image of a material on a material conveying line in real time, wherein the material from which the material thermal imaging image is acquired is a detected material, the material from which the material thermal imaging image is not acquired is an undetected material, and the material thermal imaging image of the material entering a first position area is called as a preliminary screening thermal imaging image; 2) Identifying a high temperature point of the preliminary screening thermal imaging image, and recording the discovery position of the Gao Wendian on a material conveying line; 3) And when the material of the high-temperature point marked with the finding position on the material conveying line moves to the processing position, cooling the material of the high-temperature point.

According to a first embodiment of the present invention, there is provided a high temperature detection-cooling treatment method of an activated carbon flue gas purification device:

the high temperature detection-cooling treatment method of the activated carbon flue gas purification device comprises the following steps: 1) Acquiring a material thermal imaging image of a material on a material conveying line in real time, wherein the material from which the material thermal imaging image is acquired is a detected material, the material from which the material thermal imaging image is not acquired is an undetected material, and the material thermal imaging image of the material entering a first position area is called as a preliminary screening thermal imaging image; 2) Identifying a high temperature point of the preliminary screening thermal imaging image, and recording the discovery position of the Gao Wendian on a material conveying line; 3) And when the material of the high-temperature point marked with the finding position on the material conveying line moves to the processing position, cooling the material of the high-temperature point.

Preferably, the cooling treatment is specifically that the injection flow rate of the material to the high temperature point at the treatment position is LL _N The cooling jet flow rate LL _N The following formula is satisfied:

wherein: c (C) _ht : specific heat capacity of the material, kJ/(kg); CN: specific heat capacity of cooling gas, unit kJ/(kg); LL (light-emitting diode) _ht : the flow rate of the material, the unit kg/s; LL (light-emitting diode) _N : the flow rate of the cooling gas, unit kg/s; delta T _ht : a material cooling change value; k (K) _N1 :0.6-1, the ratio of cooling gas sprayed by the cooling device to the material cooling; k (K) _N2 :0.6-1, the participation degree of cooling gas in the process of cooling materials; delta T _N : temperature rise change value of the cooling gas.

Preferably, the cooling treatment is specifically that a cooling nozzle array is arranged above the treatment position in an array manner; the cooling nozzle square matrix meets the following requirements:

wn=k0×lk equation 4

Ln=k1×3×lj equation 5

Ln0=k2×lj equation 6

Wherein, WN: the width of the square matrix of the cooling nozzle is perpendicular to the direction of the material conveying line, and the unit is mm; LK: the width of the material conveying line is in mm; k0: taking 0.8-1.5 coefficients; LN: the length of the cooling nozzle square matrix along the direction of the material conveying line is in mm; LJ: the unit length of the material conveying line is unit mm; k1: taking 0.8-2 coefficients; LN0: the unit mm is the distance between adjacent nozzles along the direction of a material conveying line on a cooling nozzle matrix; k2: taking 0.5-1 coefficient.

Preferably, the step 2) of identifying the high temperature point of the preliminary screening thermal imaging image, and recording the found position of Gao Wendian on the material conveying line specifically includes the following steps:

201 Acquiring an overall average brightness value Lz of the entire preliminary screening thermal imaging image;

dividing the preliminary screening thermal imaging image into n multiplied by m identification blocks, and obtaining a block average brightness value Lq of each block;

202 The block average luminance value Lq is compared with the ensemble average luminance value Lz,

when the block average brightness value Lq of the block is smaller than 110% Lz, judging that the whole preliminary screening thermal imaging image does not have high temperature points, and continuously calling the preliminary screening thermal imaging image of new materials entering a first position area;

when the block average brightness value Lq of the block is more than or equal to 110% Lz, judging that the whole preliminary screening thermal imaging image has suspected high-temperature points; tracking and acquiring a plurality of thermal imaging images of the suspected points in the process that the material with the suspected high temperature points moves from the first position area to the second position area;

203 Continuously analyzing a plurality of suspected point thermal imaging images, and sequentially obtaining block average brightness values Lq1, lq2, … … and Lqn of suspected high-temperature points in n suspected point thermal imaging images; the following analytical judgment is carried out:

if the average brightness values of the blocks in the suspicious point thermal imaging images acquired at adjacent intervals all meet Lq (n-1) < Lqn, identifying the suspicious high-temperature points as high-temperature points;

If the block average brightness value Lqn is more than or equal to 110% Lz, identifying the suspected high-temperature point as a high-temperature point;

if the block average brightness value Lqn is less than 110% Lz, identifying the suspected high temperature point as a false high temperature point;

204 If the suspected high temperature point is a high temperature point, marking the found position of the Gao Wendian material on a material conveying line;

205 If the suspected high temperature point is a false high temperature point, acquiring the preliminary screening thermal imaging image of the undetected material from the second position area to the first position area;

wherein the first location area is located upstream of the second location area.

s201) analyzing and identifying whether a temperature value T of a highest temperature point in the preliminary screening thermal imaging image is greater than T0, wherein T0 is 400-430 ℃; if T is more than T0, judging that the whole preliminary screening thermal imaging image has suspected high-temperature points;

s202) sequentially acquiring temperature values T1, T2, … … and T of the suspected high-temperature points in the n suspected point thermal imaging images _N The method comprises the steps of carrying out a first treatment on the surface of the The following analytical judgment is carried out:

if the temperature value T of the suspected high temperature point _N Not less than t0, the suspected high temperature point is a high temperature point;

if the temperature value T of the suspected high temperature point _N The suspected high temperature point is a false high temperature point if t0 is less than the preset value;

s203) if the suspected high temperature point is a high temperature point, marking the found position of the Gao Wendian material on a material conveying line;

s204) if the suspected high temperature point is a false high temperature point, acquiring the preliminary screening thermal imaging image of the unchecked material from the second position area to the first position area.

Preferably, the upper cover of the sealed transportation line is provided with a transportation cover plate; the material moves along the length direction of the sealed transport line.

Preferably, the material conveying line is a sealing conveying line;

step 1) acquiring a material thermal imaging image of a material on a material conveying line in real time comprises the following steps:

1a) The thermal imaging instrument is arranged above the transportation cover plate, and a first observation device is arranged on the transportation cover plate;

1b) The thermal imager reciprocates around the first observation device on a vertical plane where the central axis of the material transportation line is located, the photosensitive part of the thermal imager always points to the first observation device, and the thermal imager acquires the material thermal imaging image from the first position area to the second position area on the material transportation line through the first observation device.

Preferably, the first observation device is a thermal imaging camera observation cover; the thermal imaging camera observation cover includes: a side wall cover, a top viewing aperture, a bottom viewing aperture, a front shutter, and a rear shutter;

the top observation hole is horizontally arranged at the upper end of the side wall cover body;

the bottom observation hole is horizontally arranged at the lower end of the side wall cover body;

the thermal imager acquires the thermal imaging image of the material on the material conveying line from the first position area to the second position area through the top observing hole and the bottom observing hole;

the front shielding plate is arranged at the lower end of the side wall cover body and is positioned at the upstream side of the bottom observation hole;

the rear shielding plate is arranged at the lower end of the side wall cover body and is positioned at the downstream side of the bottom observation hole;

the space between the front shutter and the rear shutter is the bottom viewing aperture;

according to the position of the thermal imager in reciprocating motion, the front shielding plate and the rear shielding plate synchronously move in the material conveying line conveying direction;

the center of the bottom viewing aperture, the center of the top viewing aperture, and the photosensitive member of the thermal imager are on the same straight line.

Preferably, the moment of marking the found position of the Gao Wendian material on the material conveying line is recorded as Ti0;

Step 3) specifically comprises the following steps;

acquiring the distance L from the discovery position to the processing position, and obtaining the time ti0 when the high-temperature point material moves to the processing position by combining the moving speed v of the material on the material conveying line;

when starting from the moment Ti0, delaying the moment Ti0, and executing cooling treatment at the treatment position;

the cooling treatment is to spray cooling gas to the high-temperature point material at the treatment position;

preferably, the material transporting line includes: a first transport section located on the vibrating screen and a second transport section located on the bucket chain conveyor; the discovery position is on a first transport section and the processing position is on a second transport section; the time ti0 for the high temperature point material to move from the discovery position to the processing position satisfies the following formula:

XL1: finding the length of the position distance to the tail part of the first transport section, wherein the unit is mm;

XL2: the distance from the head of the second transport section to the treatment location in mm;

v0: the forward movement speed of the active carbon particles on the vibrating screen is in mm/s;

v1: the running speed of the chain bucket type conveyor is in mm/s.

According to a second embodiment of the present invention, there is provided a high temperature detection-cooling treatment system of an activated carbon flue gas purification device:

An activated carbon fume purification device high temperature detection-cooling treatment system to which the activated carbon fume purification device high temperature detection-cooling treatment method according to the first embodiment is applied, the system comprising:

a material transporting line for transporting materials;

the first observation device is arranged on the transportation cover plate of the material transportation line;

the thermal imager is arranged above the transportation cover plate and used for identifying the high-temperature point material through the first observation device;

the cooling device is in signal connection with the thermal imager and is arranged on the material conveying line and used for cooling the high-temperature point material;

the thermal imager reciprocates around the first observation device on a vertical plane where the central axis of the material transportation line is located, the photosensitive part of the thermal imager always points to the first observation device, and the thermal imager acquires the material thermal imaging image from the first position area to the second position area on the material transportation line through the first observation device;

the cooling device is located downstream of the first viewing device.

Preferably, the first observation device is a thermal imaging camera observation cover; the thermal imaging camera observation cover includes: a side wall cover, a top viewing aperture, a bottom viewing aperture, a front shutter, and a rear shutter; the top observation hole is horizontally arranged at the upper end of the side wall cover body; the bottom observation hole is horizontally arranged at the lower end of the side wall cover body; the thermal imager acquires the thermal imaging image of the material on the material conveying line from the first position area to the second position area through the top observing hole and the bottom observing hole; the front shielding plate is arranged at the lower end of the side wall cover body and is positioned at the upstream side of the bottom observation hole; the rear shielding plate is arranged at the lower end of the side wall cover body and is positioned at the downstream side of the bottom observation hole; the space between the front shutter and the rear shutter is the bottom viewing aperture;

In a first embodiment of the present application, a method of high temperature detection-cooling treatment of an activated carbon flue gas cleaning device is provided. The method comprises the steps of firstly obtaining a preliminary screening thermal imaging image of a first position area on a material conveying line, identifying a high-temperature point on the material conveying line according to the preliminary screening thermal imaging image, and recording the found position of the high-temperature point on the material conveying line. And when the material with the high temperature point marked with the found position moves to a downstream processing position, cooling the material with the high temperature point. The material at the high temperature point is cooled from the nature of burning, so that the temperature of the material at the high temperature point is reduced below the ignition point, and the effect of preventing the material on the material transportation line from spontaneous combustion on a large scale is achieved. According to the technical scheme, through the identification of the high temperature point, the material containing the high temperature point is precisely cooled, so that the production safety of the material transportation line can be effectively protected, and meanwhile, the safety maintenance cost is reduced, and the cost of preventing risks is reduced for enterprises.

In the prior art, the following description is given. Since the material transporting line (sintering activated carbon flue gas purifying device) is of an airtight structure as a whole, if spontaneous combustion of the material on the material transporting line is to be prevented, a general operation scheme is to discharge the material at a high temperature point from the material transporting line or to create an oxygen-insulating atmosphere for the material in the whole material transporting line. However, the materials are discharged from the material conveying line, so that the conveying efficiency of the material conveying line is greatly reduced; creating an oxygen barrier atmosphere increases production costs due to the use of fire suppressing gases.

In a first embodiment provided herein, location information is incorporated for the location of the discovery of a high temperature point on a material handling line. The method can accurately predict when the material containing the high temperature point reaches the treatment position; and then cooling the high-temperature point material at the treatment position. Cooling dropThe temperature treatment is carried out by spraying a certain amount (LL _N ) Is provided. While cooling jet flow rate LL _N Satisfying the requirements of equation 12. Cooling injection flow rate LL obtained by equation 12 _N By introducing LL _ht 、ΔT _ht 、ΔT _N Isovaries, fully consider the ratio K of cooling gas to cooling _N1 And the participation degree of the cooling gas participating in cooling, so that the dosage of the cooling gas can be accurately controlled, and the use cost of the cooling gas can be controlled while the cooling purpose is achieved through the technical scheme.

The temperature of the material which is about to reach the combustion point is further reduced to below the combustion point, so that the material is subjected to heat conduction and temperature reduction for the surrounding material after leaving the treatment position.

The cooling gas is: carbon dioxide, nitrogen, and the like can suppress the combustion reaction.

In the first embodiment provided in the present application, in the cooling down treatment process, a cooling nozzle square matrix is provided above the treatment position, and the cooling nozzle square matrix satisfies formula 4, formula 5 and formula 6 so that the number of cooling nozzles is reasonably arranged, thereby further improving the cooling effect.

In a first embodiment provided herein, step 2) has two schemes for identifying high temperature points;

the first recognition scheme is as follows: and judging whether the temperature of the local material in the area of the whole preliminary screening thermal imaging image is abnormally higher than the temperature of the material in other areas by judging the relation between the local brightness value in the preliminary screening thermal imaging image and the average brightness value of the whole image. The scheme judges the relative relation of the brightness values, is not influenced by the temperature measurement accuracy, and can effectively prolong the service judgment life of the equipment.

It should be noted that, when the sensory element of the thermal imaging apparatus is in use, the conduction of the infrared light is blocked due to the action of dust, which is very easy to cause inaccurate result of judging the high temperature point directly according to the temperature measurement value.

The second recognition scheme is that whether the temperature of the material conveying line exceeds a limit value t0 is detected directly through a thermal imager. A local material, i.e. a suspected high temperature point material, having a temperature exceeding a defined value t0 is identified in the first location area.

Whether the first scheme or the second scheme is adopted, after the suspected high-temperature point material is found in the first position area, the material is tracked and monitored to the second position area, and whether the suspected high-temperature point material is a high-temperature point is further judged.

In the first recognition scheme, firstly, acquiring a preliminary screening thermal imaging image in a first position area, and analyzing whether the preliminary screening thermal imaging image has suspected high-temperature points or not; and tracking and monitoring the material with the suspected high-temperature point preliminary screening thermal imaging image, namely acquiring a plurality of suspected point thermal imaging images of the material with the suspected high-temperature point from the first position area to the second position area, and analyzing and confirming whether the suspected high-temperature point is the high-temperature point. If the suspected Gao Wendian is a high temperature point, the found position of the Gao Wendian material on the material conveying line is further marked. And when the materials at the found position are moved to the processing position, cooling and cooling processing is carried out. In the transportation process of high-temperature materials, when the temperature of the materials reaches a certain value, oxidation exothermic reaction can occur in the materials, so that the temperature of the materials is further increased, and spontaneous combustion occurs; however, the spontaneous combustion condition of the materials disappears due to vibration or relative change of internal positions among the materials in the transportation process, which can destroy the conditions of the oxidation exothermic reaction of the materials. If the material at the high temperature point is simply cooled after the high temperature point is detected, the maintenance cost of production is greatly increased. According to the technical scheme, the process of identifying the high-temperature point materials can be divided into preliminary suspicions, and the judgment is tracked, so that accurate judgment data of the high-temperature point can be obtained; and further, accurate cooling treatment can be performed.

It should be noted that, the infrared radiation amount of the high-temperature point material is low relative to the peripheral low-temperature material, so that in the preliminary screening thermal imaging image, the average brightness value Lq of the high-temperature point area is higher than the average brightness value Lz of the whole preliminary screening thermal imaging image. Experimental tests show that the condition of spontaneous combustion is generally achieved when Lq is more than or equal to 110 Lz.

It should be noted that, the material is in the in-process of material transportation line transportation, because the vibration of this application of material transportation line can make appear local relative displacement between the material granule on the material transportation line to make the material that can spontaneous combustion originally release heat, thereby judge as false high temperature point material by initial suspected high temperature point material.

It should be noted that, when the high temperature point is determined to be a false high temperature point in step 205), a preliminary screening thermal imaging image of the undetected material from the second location area to the first location area is rapidly acquired, so as to ensure that no material is missed. If the preliminary screening thermal imaging image obtained in the process has suspected high temperature points, tracking is directly started to judge whether the new suspected high temperature points are high temperature points or not.

It should be noted that, in the specific embodiment of the technical solution provided in the present application, there is not only one thermal imager. In a specific implementation process, a plurality of independent thermal imagers are controlled to execute the method provided by the technical scheme of the application. The effect of uninterrupted real-time analysis and judgment of high-temperature points on the material conveying line is achieved.

It should be noted that, the cooling treatment is performed, that is, the material spontaneously combusting on the material transporting line is cooled, so as to ensure the safety of most materials and equipment, and the method is the last line of defense for automatic treatment in the safe production process.

In a first embodiment of the present application, a material handling line is provided with a handling deck; a thermal imager for obtaining thermal imaging images sets up the top on the material transportation line, and is located the top of transportation apron. The thermal imaging instrument observes the materials on the material conveying line through the first observation device; the first observation device plays roles of eliminating observation obstacle of the thermal imager and optimizing imaging environment and imaging background; meanwhile, the first observation device can also prevent dust in materials of the material conveying line from overflowing.

It should be noted that, as shown in the accompanying drawings, the thermal imager makes reciprocating motion around the first observation device to observe the material on the material conveying line, namely, the size of the opening on the material conveying line can be reduced, and leakage of material dust on the material conveying line is reduced.

The reciprocating motion is specifically a reciprocating motion in the material transporting direction; more specifically, the reciprocating motion is circular arc motion, and the thermal imager performs circular arc motion by taking the observation hole of the first observation device as the center of a circle.

It should be noted that the material transporting line is preferably a closed material transporting line. The airtight material conveying line can further prevent dust or tiny particles in the material from leaking.

In a first embodiment of the present application, the top viewing aperture and the bottom viewing aperture of the first viewing device are in communication; and the position of the bottom observation hole is adaptively adjusted according to the position of the thermal imager so that the bottom observation hole, the top observation hole and the photosensitive element of the thermal imager are positioned on the same straight line.

It should be noted that, in order to reduce the area of bottom observation hole, through preceding sunshade and back sunshade, reduce the actual area of bottom observation hole, simultaneously through the position of sunshade and back sunshade before adjusting, adjust the hole position of bottom observation hole to make the bottom observation hole satisfy the demand that the imager observed material transportation line material through first viewing device.

In a first embodiment of the present application, in step 3), after the last confirmation of the found location of the material at the high temperature point in the second location area. The waiting time ti0 for the discharging operation at the processing position is determined according to the speed of the material transporting line.

It should be noted that, in the technical scheme provided by the application, the related material transportation line is an abstract upper concept, and the "material transportation line" may be only one common material transportation line; the "material handling line" may also include individual links or a combination of links throughout the material handling process. In a particular embodiment of the present application, a "material transport line" includes a first transport section located on a vibrating screen and a second transport section located on a bucket chain conveyor. The waiting time ti0 considers the transport speeds and conditions of the first transport section and the second transport section.

In a second embodiment of the present application, an activated carbon flue gas cleaning device high temperature detection-cooling treatment system is provided. The system comprises a first observation device arranged on a transportation cover plate of a material transportation line; and the thermal imager is positioned above the first observation device and is used for observing the materials on the material conveying line through the first observation device. In order to reduce the size of the opening on the transportation cover plate, the thermal imager reciprocates relative to the first observation device, so that the material on the material transportation line is observed, namely, the material in the range from the first position area to the second position area can be observed, whether the spontaneous combustion material appears or not is identified, and then the cooling device is controlled to cool the spontaneous combustion material. Through the technical scheme of this application, through the discernment to the high temperature point, accurate carries out cooling to the material that contains the high temperature point and handles, can reduce this safe maintenance cost when effectively protecting the production safety of material transportation line to reduce the cost of preventing the risk for the enterprise.

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

1. according to the technical scheme, the process of identifying the high-temperature point materials can be divided into preliminary suspicions, and the judgment is tracked, so that accurate judgment data of the high-temperature point can be obtained;

2. According to the technical scheme, under the condition that the high-temperature point is identified, the material at the high-temperature point can be precisely cooled;

3. according to the technical scheme, the induction accuracy of the thermal imaging instrument can be improved.

Drawings

FIG. 1 is a flow chart of a high temperature detection-cooling treatment method of an activated carbon flue gas purification device in an embodiment of the invention;

FIG. 2 is a flow chart of a method for identifying high temperature points and marking found locations in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a thermal imager acquiring a thermal image of a first location area according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a thermal imager acquiring a thermal image of a second location area according to an embodiment of the present invention;

FIG. 5 is a schematic view of a material transporting line according to an embodiment of the present invention;

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

FIG. 7 is a schematic diagram of the operation of a prior art activated carbon desulfurization and denitrification device;

FIG. 8 is a schematic diagram of a tower structure;

FIG. 9 is a signal connection diagram of a thermal imager, a master controller, and a thermal imager data processing background in an embodiment of the invention;

FIG. 10 is a flow chart of thermal imager data processing in an embodiment of the invention;

FIG. 11 is a schematic diagram of a high-temperature detection-cooling treatment system of an activated carbon flue gas purification device in an embodiment of the invention;

FIG. 12 is a logic diagram of a high temperature activated carbon particle processing flow in an embodiment of the present invention;

FIG. 13 is a top view of a cooling device according to an embodiment of the present invention;

fig. 14 is a front view of a cooling device according to an embodiment of the present invention.

Reference numerals:

a1: a first location area; a2: a second location area; 1: a material transporting line; 101: a first transport section; 102: a second transport section; 103: a transport deck; 2: a first observation device; 201: a sidewall cover; 202: a top viewing aperture; 203: a bottom viewing aperture; 204: a front shield; 205: a rear shield; 3: a thermal imager; 301: a photosensitive member; 4: and a cooling device.

Detailed Description

the high temperature detection-cooling treatment method of the activated carbon flue gas purification device comprises the following steps: 1) Acquiring a material thermal imaging image of a material on a material conveying line 1 in real time, wherein the material from which the material thermal imaging image is acquired is a detected material, the material from which the material thermal imaging image is not acquired is an undetected material, and the material thermal imaging image of the material entering a first position area A1 is called as a preliminary screening thermal imaging image; 2) Identifying a high temperature point of the preliminary screening thermal imaging image, and recording the discovery position of the Gao Wendian on the material conveying line 1; 3) And when the material of the high-temperature point marked with the finding position on the material conveying line 1 moves to a processing position, cooling the material of the high-temperature point.

wherein: c (C) _ht : specific heat capacity of the material, kJ/(kg); CN: specific heat capacity of cooling gas, unit kJ/(kg); LL (light-emitting diode) _ht : the flow rate of the material, the unit kg/s; LL (light-emitting diode) _N : the flow rate of the cooling gas, unit kg/s; delta T _ht : a material cooling change value; k (K) _N1 :0.6-1, the ratio of the cooling gas sprayed by the cooling device 4 to the material cooling; k (K) _N2 :0.6-1, the participation degree of cooling gas in the process of cooling materials; delta T _N : temperature rise change value of the cooling gas.

wn=k0×lk equation 4

Ln=k1×3×lj equation 5

Ln0=k2×lj equation 6

Wherein, WN: the width of the square matrix of the cooling nozzle is perpendicular to the direction of the material conveying line 1, and the unit is mm; LK: the width of the material conveying line 1 is in mm; k0: taking 0.8-1.5 coefficients; LN: the length of the cooling nozzle square matrix along the direction of the material conveying line 1 is in mm; LJ: the unit length of the material conveying line 1 is unit mm; k1: taking 0.8-2 coefficients; LN0: the unit mm is the distance between adjacent nozzles along the direction of the material conveying line 1 on the cooling nozzle square matrix; k2: taking 0.5-1 coefficient.

Preferably, the step 2) of identifying the high temperature point of the preliminary screening thermal imaging image, and recording the found position of the Gao Wendian on the material conveying line 1 specifically includes the following steps:

when the block average brightness value Lq of the block is smaller than 110% Lz, judging that the whole preliminary screening thermal imaging image does not have high temperature points, and continuously calling the preliminary screening thermal imaging image of the new material entering the first position area A1;

when the block average brightness value Lq of the block is more than or equal to 110% Lz, judging that the whole preliminary screening thermal imaging image has suspected high-temperature points; tracking and acquiring a plurality of thermal imaging images of the suspected points in the process that the material with the suspected high temperature points moves from the first position area A1 to the second position area A2;

204 If the suspected high temperature point is a high temperature point, marking the found position of the Gao Wendian material on the material conveying line 1;

205 If the suspected high temperature point is a false high temperature point, acquiring the preliminary screening thermal imaging image of the undetected material from the second position area A2 to the first position area A1;

wherein the first location area A1 is located upstream of the second location area A2.

s203) if the suspected high temperature point is a high temperature point, marking the found position of the Gao Wendian material on the material conveying line 1;

s204) if the suspected high temperature point is a false high temperature point, acquiring the preliminary screening thermal imaging image of the undetected material from the second location area A2 to the first location area A1.

Preferably, the upper cover of the sealed transportation line is provided with a transportation cover plate 103; the material moves along the length direction of the sealed transport line.

Preferably, the material conveying line 1 is a sealing conveying line;

step 1) acquiring a material thermal imaging image of a material on a material conveying line 1 in real time comprises the following steps:

1a) A thermal imaging device 3 is arranged above the transportation cover plate 103, and a first observation device 2 is arranged on the transportation cover plate 103;

1b) The thermal imager 3 reciprocates around the first observation device 2 on a vertical plane where the central axis of the material conveying line 1 is located, the photosensitive part of the thermal imager 3 always points to the first observation device 2, and the thermal imager 3 acquires the thermal imaging images of the material on the material conveying line 1 from the first position area A1 to the second position area A2 through the first observation device 2.

Preferably, the first observation device 2 is a thermal imaging camera observation cover; the thermal imaging camera observation cover includes: a sidewall cover 201, a top viewing aperture 202, a bottom viewing aperture 203, a front shroud 204, and a rear shroud 205;

the top observation hole 202 is horizontally arranged at the upper end of the side wall cover 201;

the bottom observation hole 203 is horizontally arranged at the lower end of the side wall cover 201;

the thermal imager 3 acquires the thermal imaging images of the material on the material transporting line 1 from the first position area A1 to the second position area A2 through the top observation hole 202 and the bottom observation hole 203;

the front shutter 204 is provided at the lower end of the side wall cover 201 and is located on the upstream side of the bottom observation hole 203;

the rear shutter 205 is provided at the lower end of the side wall cover 201 and is located at the downstream side of the bottom observation hole 203;

the space between the front shutter 204 and the rear shutter 205 is the bottom view port 203;

according to the position where the thermal imager 3 reciprocates, the front shutter 204 and the rear shutter 205 move synchronously in the transport direction of the material transporting line 1;

the center of the bottom observation hole 203, the center of the top observation hole 202, and the photosensitive member of the thermal imager 3 are on the same straight line.

Preferably, the moment of marking the found position of the Gao Wendian material on the material conveying line 1 is recorded as Ti0;

step 3) specifically comprises the following steps;

acquiring the distance L from the discovery position to the processing position, and obtaining the time ti0 when the high-temperature point material moves to the processing position by combining the moving speed v of the material on the material conveying line 1;

preferably, the material transporting line 1 includes: a first transport section 101 located on the vibrating screen and a second transport section 102 located on the bucket chain conveyor; the discovery position is on the first transport section 101 and the processing position is on the second transport section 102; the time ti0 for the high temperature point material to move from the discovery position to the processing position satisfies the following formula:

V1: the running speed of the chain bucket type conveyor is in mm/s.

a material transporting line 1 for transporting materials;

a first observation device 2 arranged on the transport cover plate 103 of the material transport line 1;

a thermal imager 3 disposed above the transport cover 103 for identifying high temperature point materials through the first observation device 2;

the cooling device 4 is in signal connection with the thermal imager 3, is arranged on the material conveying line 1 and is used for cooling high-temperature point materials;

the thermal imager 3 reciprocates around the first observation device 2 on a vertical plane where the central axis of the material conveying line 1 is located, the photosensitive part of the thermal imager 3 always points to the first observation device 2, and the thermal imager 3 acquires the material thermal imaging images from the first position area A1 to the second position area A2 on the material conveying line 1 through the first observation device 2;

The cooling device 4 is located downstream of the first viewing device 2.

Preferably, the first observation device 2 is a thermal imaging camera observation cover; the thermal imaging camera observation cover includes: a sidewall cover 201, a top viewing aperture 202, a bottom viewing aperture 203, a front shroud 204, and a rear shroud 205; the top observation hole 202 is horizontally arranged at the upper end of the side wall cover 201; the bottom observation hole 203 is horizontally arranged at the lower end of the side wall cover 201; the thermal imager 3 acquires the thermal imaging images of the material on the material transporting line 1 from the first position area A1 to the second position area A2 through the top observation hole 202 and the bottom observation hole 203; the front shutter 204 is provided at the lower end of the side wall cover 201 and is located on the upstream side of the bottom observation hole 203; the rear shutter 205 is provided at the lower end of the side wall cover 201 and is located at the downstream side of the bottom observation hole 203; the space between the front shutter 204 and the rear shutter 205 is the bottom view port 203;

Example 1

Example 2

Example 1 was repeated except that the cooling down treatment was specifically performed by injecting a flow rate LL into the high temperature point material at the treatment location _N The cooling jet flow rate LL _N The following formula is satisfied:

Example 3

Repeating the embodiment 2, wherein the cooling treatment is specifically that a cooling nozzle array is arranged above the treatment position; the cooling nozzle square matrix meets the following requirements:

wn=k0×lk equation 4

Ln=k1×3×lj equation 5

Ln0=k2×lj equation 6

Example 4

Example 3 was repeated except that step 2) identified the high temperature point of the primary screening thermographic image and recording the found location of Gao Wendian on the material handling line 1 specifically included the steps of:

Example 5

Example 6

Example 5 was repeated except that the sealed transport line was covered with transport cover plate 103; the material moves along the length direction of the sealed transport line. The material conveying line 1 is a sealing conveying line.

Example 7

Example 4 was repeated except that step 1) of acquiring a thermal imaging image of the material on the material handling line 1 in real time comprises the steps of:

Example 8

Example 7 is repeated except that the first observation device 2 is a thermal imager observation hood; the thermal imaging camera observation cover includes: a sidewall cover 201, a top viewing aperture 202, a bottom viewing aperture 203, a front shroud 204, and a rear shroud 205; the top observation hole 202 is horizontally arranged at the upper end of the side wall cover 201; the bottom observation hole 203 is horizontally arranged at the lower end of the side wall cover 201; the thermal imager 3 acquires the thermal imaging images of the material on the material transporting line 1 from the first position area A1 to the second position area A2 through the top observation hole 202 and the bottom observation hole 203; the front shutter 204 is provided at the lower end of the side wall cover 201 and is located on the upstream side of the bottom observation hole 203; the rear shutter 205 is provided at the lower end of the side wall cover 201 and is located at the downstream side of the bottom observation hole 203; the space between the front shutter 204 and the rear shutter 205 is the bottom view port 203; according to the position where the thermal imager 3 reciprocates, the front shutter 204 and the rear shutter 205 move synchronously in the transport direction of the material transporting line 1; the center of the bottom observation hole 203, the center of the top observation hole 202, and the photosensitive member of the thermal imager 3 are on the same straight line.

Example 9

Example 8 was repeated except that the time of marking the found position of the Gao Wendian material on the material handling line 1 was recorded as Ti0; step 3) specifically comprises the following steps; acquiring the distance L from the discovery position to the processing position, and obtaining the time ti0 when the high-temperature point material moves to the processing position by combining the moving speed v of the material on the material conveying line 1; when starting from the moment Ti0, delaying the moment Ti0, and executing cooling treatment at the treatment position; the cooling treatment is to spray cooling gas to the high-temperature point material at the treatment position; preferably, the material transporting line 1 includes: a first transport section 101 located on the vibrating screen and a second transport section 102 located on the bucket chain conveyor; the discovery position is on the first transport section 101 and the processing position is on the second transport section 102; the time ti0 for the high temperature point material to move from the discovery position to the processing position satisfies the following formula:

V1: the running speed of the chain bucket type conveyor is in mm/s.

Example 10

A high temperature detection-cooling treatment system for an activated carbon flue gas purification device, the system comprising: a material transporting line 1 for transporting materials; a first observation device 2 arranged on the transport cover plate 103 of the material transport line 1; a thermal imager 3 disposed above the transport cover 103 for identifying high temperature point materials through the first observation device 2; the cooling device 4 is in signal connection with the thermal imager 3, is arranged on the material conveying line 1 and is used for cooling high-temperature point materials; the thermal imager 3 reciprocates around the first observation device 2 on a vertical plane where the central axis of the material conveying line 1 is located, the photosensitive part of the thermal imager 3 always points to the first observation device 2, and the thermal imager 3 acquires the material thermal imaging images from the first position area A1 to the second position area A2 on the material conveying line 1 through the first observation device 2; the cooling device 4 is located downstream of the first viewing device 2.

Example 11

Example 10 is repeated except that the first observation device 2 is a thermal imager observation hood; the thermal imaging camera observation cover includes: a sidewall cover 201, a top viewing aperture 202, a bottom viewing aperture 203, a front shroud 204, and a rear shroud 205; the top observation hole 202 is horizontally arranged at the upper end of the side wall cover 201; the bottom observation hole 203 is horizontally arranged at the lower end of the side wall cover 201; the thermal imager 3 acquires the thermal imaging images of the material on the material transporting line 1 from the first position area A1 to the second position area A2 through the top observation hole 202 and the bottom observation hole 203; the front shutter 204 is provided at the lower end of the side wall cover 201 and is located on the upstream side of the bottom observation hole 203; the rear shutter 205 is provided at the lower end of the side wall cover 201 and is located at the downstream side of the bottom observation hole 203; the space between the front shutter 204 and the rear shutter 205 is the bottom view port 203; according to the position where the thermal imager 3 reciprocates, the front shutter 204 and the rear shutter 205 move synchronously in the transport direction of the material transporting line 1; the center of the bottom observation hole 203, the center of the top observation hole 202, and the photosensitive member of the thermal imager 3 are on the same straight line.

According to the technical scheme provided by the application, the following use embodiments are obtained.

The material transportation line that this application relates to includes: a first transport section located on the vibrating screen and a second transport section located on the bucket chain conveyor. The invention uses a thermal imager to detect high-temperature active carbon particles, and the detection point is arranged at an active carbon vibrating screen (hereinafter referred to as a vibrating screen). A schematic diagram of the high-temperature detection-cooling treatment method of the activated carbon flue gas purification device is shown in fig. 4: the vibrating screen (material conveying line) is provided with a vibrating screen width hole, and an imaging area of the thermal imager can cover the range of the opening hole; the imaging range of the thermal imager can be represented by an angle of view a.b, the proper placement position of the thermal imager above the vibrating screen can be calculated according to the angle of view of the thermal imager, and the set position of the thermal imager is determined according to the on-site actual situation and the calculation result (the vibrating screen has more peripheral equipment and personnel overhaul channels, the basic principle meets the imaging requirement, is relatively clean, does not interfere overhaul, does not influence the work of other equipment and the like); the thermal imager is independent of the vibrating screen and is arranged on a fixed measurement platform capable of guaranteeing stable imaging of the thermal imager; the opening on the vibrating screen is as wide as the vibrating screen so as to ensure that the thermal imaging instrument can detect all the active carbon flowing through the screen plate;

The relationship among the thermal imager, the main process computer control system (hereinafter referred to as the main control in the drawings) and the data processing background of the thermal imager is shown in fig. 9:

the thermal imager data processing flow is shown in fig. 10: after the thermal imager finds a high temperature point (T > T0, T0 is a settable threshold temperature, for example, 430 ℃) higher than the spontaneous combustion temperature in the effective imaging area, the active carbon particles with the high temperature point can be judged, namely, an alarm is sent to a main control so as to enter the next processing flow.

After the high temperature point activated carbon particles are detected, there are two disposal modes: 1. discharging high-temperature activated carbon; discharging the high temperature activated carbon increases the loss of the activated carbon flue gas purification system, and the discharged high temperature activated carbon particles need further treatment; 2. reducing the temperature of the high-temperature activated carbon; the high-temperature activated carbon can generate water gas reaction after meeting water, so the anhydrous high-temperature activated carbon cooling method is suitable for the activated carbon flue gas purification process.

The high-temperature active carbon cooling device (cooling device) adopts nitrogen and other gases which can isolate oxygen for cooling, and the high-temperature active carbon particles are cooled without loss of the active carbon particles, so that the high-temperature active carbon cooling device is suitable for an active carbon flue gas purifying device.

A schematic diagram of a high-temperature detection-cooling treatment system of the activated carbon flue gas purification device is shown in FIG. 11:

a cooling device is arranged at a proper position of the conveyor near the horizontal section of the vibrating screen, and nitrogen (also can be CO) ₂ And the like can extinguish fire) the nitrogen nozzle is close to the upper part of the chain bucket; the nitrogen nozzle is controlled by a nitrogen valve F1, the nitrogen valve F1 is a switch valve, and has two working states of full open and full close, the cooling device is filled with nitrogen when the switch valve is fully opened, and the cooling device is not filled with nitrogen when the switch valve is fully closed; the length of the starting point position of the observation area of the thermal imaging instrument from the tail part of the sieve plate of the vibrating screen is XL1; the distance from the tail of the screen plate of the vibrating screen to the center of the nitrogen nozzle group is XL2; the image shot by the thermal imaging instrument is processed by a data processing background of the thermal imaging instrument, and the processed alarm information is sent to the main control; the activated carbon conveyor is driven by a motor M, and the rotating speed of the motor M is regulated by a frequency converter VF when the motor M works (other speed regulating modes are also available, so that a speed regulating effect similar to that of the frequency converter can be achieved); the nitrogen valve F1 and the frequency converter VF are monitored by a main control; the relation among the chain bucket running speed V1 of the chain bucket conveyor, the rotating speed RV of the motor M and the frequency f of the frequency converter VF is as follows:

v1=k1=k1×k2×f (formula 1)

Wherein: v1: the running speed of a chain bucket of the chain bucket type conveyor is in mm/s; RV: motor M rotation speed, unit rpm; f: the VF of the frequency converter gives frequency, unit Hz; k1: constant, related to the gear ratio of the speed reducer and the radius of the star wheel; k2: a constant related to the number of poles of the motor and the slip of the motor;

the logic block diagram of the high temperature activated carbon particle treatment flow shown in fig. 11 is shown in fig. 12: after the thermal imager detects high-temperature activated carbon particles, the main control calculates delay time ti0 according to key elements such as the position from an observation area of the thermal imager to a discharging point, the running speed of a chain bucket of the chain bucket type conveyor and the like; the delay time ti0 has the meaning of ensuring that nitrogen is sprayed out when the chain bucket where the high-temperature activated carbon particles are positioned passes through the cooling point;

the delay time ti1 has the meaning of ensuring that the chain bucket where the high-temperature activated carbon particles are positioned can pass through a nitrogen area to isolate oxygen, thereby achieving the purpose of cooling the high-temperature activated carbon particles, and being determined by the running speed of the chain bucket conveyor.

The delay time ti0 is calculated according to the following formula:

wherein: ti0: after the high-temperature activated carbon particles are detected, the time delay time length from the start of the nitrogen valve F1 is up is unit s; XL1: the starting point position of the observation area of the thermal imager is a unit mm from the tail length of the screen plate of the vibrating screen (the length from the discovery position to the tail of the first conveying section); XL2: the distance (the distance from the head of the second transport section to the treatment position) from the tail of the screen plate of the vibrating screen to the center point of the nitrogen nozzle group is in mm; LJ: chain link length of the chain bucket conveyor in mm; v0: the forward movement speed of the active carbon particles on the vibrating screen is in mm/s; v1: the running speed of a chain bucket of the chain bucket type conveyor is in mm/s;

As shown in equation 2, the time delay period is equal to the time that the activated carbon particles move from the detection point to the discharge point, and the time that the single chain link passes the discharge point is subtracted (since the chain bucket conveyor is in units of chain links, it is impossible to start discharging from 0.5 chain links).

The retention time ti1 is calculated as follows:

wherein: ti1: the nitrogen F1 is opened for a holding time length, and the unit is s; LJ: chain link length of the chain bucket conveyor in mm; v1: the running speed of a chain bucket of the chain bucket type conveyor is in mm/s;

the cooling time period ti1 as determined by the formula 3 can ensure that the high-temperature activated carbon particles can isolate oxygen and cool the high-temperature activated carbon particles. Substituting equation 1 into

equations

2 and 3, the delay times ti0 and ti1 can be determined based on the in-production conveyor given frequency f.

The high temperature activated carbon cooling device shown in fig. 11 is as shown in fig. 13 to 14: the high-temperature activated carbon cooling device is fixed right above the chain bucket conveyor (the chain bucket conveyor is of a sealing structure, the inner space and the frame are enough for installing and supporting the high-temperature activated carbon cooling device), the high-temperature activated carbon cooling device is arranged parallel to the chain bucket, the height of the lower edge of the high-temperature activated carbon cooling device from the edge plane of the chain bucket opening is HN, and the HN value is not more than the height of the chain bucket; the center line of the chain bucket is aligned with the center line of the chain bucket; the high-temperature active carbon cooling device is of a fish bone-shaped hollow structure, a nitrogen inlet is arranged, the other tail ends are closed, and a nitrogen outlet is an opening at the lower edge of each branch pipe; the lower edges of the branch pipes of the high-temperature active carbon cooling device are uniformly distributed along the openings, single-row or multi-row holes can be formed, and when the cooling device works, the nitrogen flow of each hole is basically consistent; the distance between two branch pipes which are farthest mutually gathered by the high-temperature activated carbon cooling device is the length LN of the high-temperature activated carbon cooling device, and the distance between two adjacent branch pipes is the distance LN0 between the branch pipes; the width of the high-temperature active carbon cooling device is the width WN of a branch pipe thereof; LN, LN0, WN are determined as follows:

WN=k0.LK (equation 4)

Ln=k1×3×lj (formula 5)

Ln0=k2×lj (formula 6)

Wherein: and WN: the width of the active carbon cooling device (the width of the fire extinguishing nozzle square matrix vertical to the direction of the material conveying line) is in mm; LK: bucket width (width of material transporting line) of bucket conveyor in mm; k0: taking 0.9-1 coefficient; LN: the length of the active carbon cooling device (the length of the fire extinguishing nozzle square matrix along the direction of the material conveying line) is in mm; LJ: chain length of the chain bucket conveyor (unit length of the material conveying line) in mm; k1: taking 0.8-2 coefficients; LN0: the spacing of the branch pipes of the active carbon cooling device (the spacing between adjacent nozzles along the direction of a material conveying line on a fire extinguishing nozzle square matrix) is in unit mm; k2: taking 0.5 to 1 coefficient;

the active carbon cooling device determined according to formulas 4, 5 and 6 can ensure that at least one branch pipe is arranged above the chain bucket of each material conveying line, the active carbon cooling device can be arranged in the active carbon conveyor, the length of 2.5-6 active carbon chain buckets is covered, and the width of 1 active carbon chain bucket is basically covered, so that nitrogen sprayed by the active carbon cooling device can be ensured to isolate air during the passing of the chain bucket, and the requirements are met.

In order to ensure that nitrogen sprayed by the activated carbon extinguishing device can isolate air during the passing of the chain bucket, the nitrogen flow is calculated according to the following formula:

Wherein: VN: nitrogen flow (flow of fire extinguishing gas), unit L/s; LK: bucket width (width of material transporting line) of bucket conveyor in mm; LN: the length of the active carbon extinguishing device (the length of the blowing surface along the direction of the material conveying line) is in mm; LJ: chain link length (unit length of material conveying line) of the chain bucket conveyor, unit mm; HN: the height of the active carbon extinguishing device from the chain bucket opening along the plane (the height from the fire extinguishing gas jet opening to the surface of the material) is in mm; LH: chain bucket height (thickness of materials laid on a material conveying line) of the chain bucket type conveyor is in mm; v1max: maximum running speed of chain bucket of the chain bucket type conveyor (maximum running speed of a material conveying line) in mm/s;

the nitrogen flow of the activated carbon extinguishing device calculated according to the formula 7 can ensure that each chain bucket can be filled with nitrogen in unit time (LJ/V1 max) passing through the working activated carbon extinguishing device from the nozzle position at the lower end of the extinguishing device to the space volume at the bottom of the corresponding chain bucket, and the smoldering (spontaneous combustion) activated carbon is isolated from air.

In order to ensure that nitrogen sprayed by the active carbon cooling device can cool high-temperature active carbon to a certain temperature during the passing of the chain bucket; and nitrogen is used as a cooling medium to cool the high-temperature activated carbon, and the heat exchange formula is shown in formula 8:

C _ht *M _ht *ΔT _ht ＝C _N *M _N *ΔT _N (equation 8)

Wherein: c (C) _ht : specific heat capacity of activated carbon, unit kJ/(kg); m is M _ht : the mass of the active carbon is in kg; delta T _ht : activated carbon cool down targets, such as 15 ℃; c (C) _N : specific heat capacity of nitrogen, unit kJ/(kg); m is M _N : nitrogen mass, unit kg; delta T _N : nitrogen heating value;

according to the device shown in fig. 13, the temperature reduction target of the activated carbon can be set to be 20-50 ℃, and because the high-temperature activated carbon particles cooled by the device shown in fig. 13 are contained in the conveyor chain bucket, the conveyor chain bucket is surrounded by the conveyor shell, two key factors need to be considered in the cooling process: 1. proportion 2 of nitrogen participating in the cooling process of the activated carbon, and heat conversion rate of the activated carbon of which the nitrogen participates in the cooling process; equation 8 is modified as shown in equation 9:

C _ht *M _ht *ΔT _ht ＝C _N *(K _N1 *M _N )*[K _N2 *(125-25)](equation 9)

Wherein: c (C) _ht : specific heat capacity of activated carbon, unit kJ/(kg); m is M _ht : the mass of the active carbon is in kg; delta T _ht : activated carbon cool down targets, such as 15 ℃; c (C) _N : specific heat capacity of nitrogen, unit kJ/(kg DEG C) M _N : nitrogen mass, unit kg; k (K) _N1 : the ratio of the nitrogen sprayed by the cooling device to the cooling of the activated carbon is smaller than 1 and can be obtained empirically; k (K) _N2 : the coefficient smaller than 1, the participation degree of nitrogen in the process of cooling the activated carbon can be obtained empirically; (125-25): 125 refers to the ideal state, nitrogen is heated to the average temperature of the activated carbon particles in the heat exchange process, 25 refers to the average temperature before the nitrogen cools the activated carbon particles, and the meaning of the formula refers to the temperature of the activated carbon particles after the nitrogen at 25 ℃ cools the activated carbon, and then the nitrogen is heated to 125 ℃;

Equation 9 derives as shown in equation 10:

C _ht *M _ht *ΔT _ht ＝100*K _N1 *K _N2 *C _N *M _N (equation 10)

With reference to the use scenario of the device shown in fig. 13, equation 10 can be derived as follows:

wherein: c (C) _ht : specific heat capacity of activated carbon, kJ/(kg); LL (light-emitting diode) _ht : activated carbon flow, unit kg/s; LL (light-emitting diode) _N : nitrogen flow, unit kg/s; t: length of cooling time: delta T _ht : activated carbon cool down targets, such as 25 ℃; k (K) _N1 : a coefficient smaller than 1, and a ratio of nitrogen gas sprayed from the cooling device to the cooling of the activated carbonThe rate can be obtained empirically; k (K) _N2 : the coefficient smaller than 1, the participation degree of nitrogen in the process of cooling the activated carbon can be obtained empirically;

in connection with the use scenario of the device shown in fig. 13, equation 11 may derive equation 12 as follows:

/>

wherein: c (C) _ht : specific heat capacity of activated carbon, kJ/(kg); LL (light-emitting diode) _ht : activated carbon flow, unit kg/s; LL (light-emitting diode) _N : nitrogen flow, unit kg/s; delta T _ht : activated carbon cool down targets, such as 25 ℃; k (K) _N1 : the ratio of the nitrogen sprayed by the cooling device to the cooling of the activated carbon is smaller than 1 and can be obtained empirically; k (K) _N2 : the coefficient less than 1, the participation degree of nitrogen in the process of cooling the activated carbon can be obtained empirically.

The formula 12 is normalized to obtain the formula 12-1 as follows:

Wherein: c (C) _ht : specific heat capacity of the material, kJ/(kg); CN: specific heat capacity of cooling gas, unit kJ/(kg); LL (light-emitting diode) _ht : the flow rate of the material, the unit kg/s; LL (light-emitting diode) _N : the flow rate of the cooling gas, unit kg/s; delta T _ht : a material cooling change value; k (K) _N1 :0.6-1, the ratio of the cooling gas sprayed by the cooling device (4) to the material cooling; k (K) _N2 :0.6-1, the participation degree of cooling gas in the process of cooling materials; delta T _N : temperature rise change value of the cooling gas.

As can be seen from fig. 11, the activated carbon particles in the chain bucket passing through the cooling device come from the roller feeder blanking device G1, and the current flow rate is the same as that of the roller feeder at a certain moment in the past, and the difference time period ti4 is:

ti4=ti2+t1 (formula 13)

Wherein: ti2: after the high-temperature activated carbon particles are detected, the action delay time length of the cooling water valve is unit s; t1: and a constant, wherein the time length of the activated carbon particles moving from the discharging device G1 of the analytic tower to the starting point of the high-temperature activated carbon particle detection area is in units of s.

According to the formula 7, the nitrogen gas volumetric flow VN required for extinguishing the spontaneous combustion activated carbon particles can be calculated; the nitrogen mass flow LL required for cooling the activated carbon can be calculated according to equation 10 _N The method comprises the steps of carrying out a first treatment on the surface of the After the two are converted into the same dimension (mass flow or volume flow), the larger value is taken as the nitrogen flow of the quenching cooling device.

Claims

1. The high-temperature detection-cooling treatment method for the activated carbon flue gas purification device is characterized by comprising the following steps of:

1) Acquiring a material thermal imaging image of a material on a material conveying line (1) in real time, wherein the material from which the material thermal imaging image is acquired is a detected material, the material from which the material thermal imaging image is not acquired is an undetected material, and the material thermal imaging image of the material entering a first position area (A1) is called as a preliminary screening thermal imaging image;

2) Identifying a high temperature point of the preliminary screening thermal imaging image, and recording a found position of the Gao Wendian on a material conveying line (1);

3) When the material of the high-temperature point marked with the finding position on the material conveying line (1) moves to a processing position, cooling the material of the high-temperature point;

the material transporting line (1) comprises: a first transport section (101) located on the vibrating screen and a second transport section (102) located on the bucket chain conveyor; the discovery position is on a first transport section (101) and the treatment position is on a second transport section (102).

2. The method for high-temperature detection and cooling treatment of an activated carbon flue gas purification device according to claim 1, wherein the cooling treatment is specifically that the flow rate of the material injection to the high-temperature point at the treatment position is LL _N Cooling gas of (1), cooling jet flow rate LL _N The following formula is satisfied:

wherein: c (C) _ht : specific heat capacity of the material, kJ/(kg); c (C) _N : specific heat capacity of cooling gas, unit kJ/(kg); LL (light-emitting diode) _ht : the flow rate of the material, the unit kg/s; LL (light-emitting diode) _N : the flow rate of the cooling gas, unit kg/s; delta T _ht : a material cooling change value; k (K) _N1 :0.6-1, the ratio of the cooling gas sprayed by the cooling device (4) to the material cooling; k (K) _N2 :0.6-1, the participation degree of cooling gas in the process of cooling materials; delta T _N : temperature rise change value of the cooling gas.

3. The method for high-temperature detection-cooling treatment of an activated carbon flue gas purification device according to claim 1 or 2, wherein the cooling treatment is specifically that a cooling nozzle array is arranged above a treatment position; the cooling nozzle square matrix meets the following requirements:

WN=k0.LK (equation 4)

Ln=k1×3×lj (formula 5)

Ln0=k2×lj (formula 6)

Wherein, WN: the width of the square matrix of the cooling nozzle is perpendicular to the direction of the material conveying line (1), and the unit is mm; LK: the width of the material conveying line (1) is in mm; k0: taking 0.8-1.5 coefficients; LN: the length of the cooling nozzle square matrix along the direction of the material conveying line (1) is in mm; LJ: the unit length of the material conveying line (1) is unit mm; k1: taking 0.8-2 coefficients; LN0: the unit mm is the spacing between adjacent nozzles along the direction of a material conveying line (1) on a cooling nozzle matrix; k2: taking 0.5-1 coefficient.

4. A method of high temperature detection-cooling treatment of an activated carbon fume purification device according to claim 3, wherein step 2) of identifying the high temperature point of the preliminary screening thermographic image, recording the found location of Gao Wendian on the material transport line (1) comprises the steps of:

when the block average brightness value Lq of the block is less than 110% Lz, judging that the whole preliminary screening thermal imaging image does not have a high temperature point, and continuously calling the preliminary screening thermal imaging image of a new material entering a first position area (A1);

when the block average brightness value Lq of the block is more than or equal to 110% Lz, judging that the whole preliminary screening thermal imaging image has suspected high-temperature points; tracking and acquiring a plurality of thermal imaging images of suspected points in the process of moving the material with the suspected high temperature points from the first position area (A1) to the second position area (A2);

204 If the suspected high temperature point is a high temperature point, marking the found position of the Gao Wendian material on the material conveying line (1);

205 If the suspected high temperature point is a false high temperature point, acquiring the preliminary screening thermal imaging image of the undetected material from the second position area (A2) to the first position area (A1);

wherein the first location area (A1) is located upstream of the second location area (A2).

5. A method of high temperature detection-cooling treatment of an activated carbon fume purification device according to claim 3, wherein step 2) of identifying the high temperature point of the preliminary screening thermographic image, recording the found location of Gao Wendian on the material transport line (1) comprises the steps of:

S202) sequentially acquiring temperature values T1, T2, … … and T of the suspected high temperature points in the n Zhang Yishi-point thermal imaging image _N The method comprises the steps of carrying out a first treatment on the surface of the The following analytical judgment is carried out:

s203) if the suspected high temperature point is a high temperature point, marking the found position of the Gao Wendian material on the material conveying line (1);

s204) if the suspected high temperature point is a false high temperature point, acquiring the preliminary screening thermal imaging image of the undetected material from the second position area (A2) to the first position area (A1).

6. The high-temperature detection-cooling treatment method of an activated carbon flue gas purification device according to any one of claims 4 to 5, wherein the material transporting line (1) is a sealed transporting line; a transportation cover plate (103) is covered on the sealed transportation line; the material moves along the length direction of the sealed conveying line;

step 1) acquiring a material thermal imaging image of a material on a material conveying line (1) in real time comprises the following steps:

1a) The thermal imaging device (3) is arranged above the transportation cover plate (103), and a first observation device (2) is arranged on the transportation cover plate (103);

1b) The thermal imaging device (3) reciprocates around the first observation device (2) on a vertical plane where the central axis of the material conveying line (1) is located, the photosensitive part of the thermal imaging device (3) always points to the first observation device (2), and the thermal imaging device (3) acquires the material thermal imaging image from the first position area (A1) to the second position area (A2) on the material conveying line (1) through the first observation device (2).

7. The method for high-temperature detection-cooling treatment of an activated carbon flue gas purification device according to claim 6, wherein the first observation device (2) is a thermal imager observation hood; the thermal imaging camera observation cover includes: a side wall cover body (201), a top observation hole (202), a bottom observation hole (203), a front shielding plate (204) and a rear shielding plate (205);

the top observation hole (202) is horizontally arranged at the upper end of the side wall cover body (201);

the bottom observation hole (203) is horizontally arranged at the lower end of the side wall cover body (201);

the thermal imager (3) acquires the thermal imaging image of the material on the material conveying line (1) from the first position area (A1) to the second position area (A2) through the top observation hole (202) and the bottom observation hole (203);

The front shielding plate (204) is arranged at the lower end of the side wall cover body (201) and is positioned at the upstream side of the bottom observation hole (203);

the rear shielding plate (205) is arranged at the lower end of the side wall cover body (201) and is positioned at the downstream side of the bottom observation hole (203);

-the space between the front shutter (204) and the rear shutter (205) is the bottom viewing aperture (203);

according to the position of the thermal imager (3) in reciprocating motion, the front shielding plate (204) and the rear shielding plate (205) synchronously move in the conveying direction of the material conveying line (1);

the center of the bottom observation hole (203), the center of the top observation hole (202) and the photosensitive member of the thermal imager (3) are on the same straight line.

8. The method for high-temperature detection-cooling treatment of an activated carbon fume purification device according to claim 7, characterized in that the moment of marking the found position of the Gao Wendian material on the material transporting line (1) is recorded as Ti0;

step 3) specifically comprises the following steps;

acquiring the distance L from the discovery position to the processing position, and obtaining the time ti0 when the high-temperature point material moves to the processing position by combining the moving speed v of the material on the material conveying line (1);

and the cooling treatment is to spray cooling gas to the high-temperature point material at the treatment position.

9. The method for high-temperature detection-cooling treatment of an activated carbon flue gas cleaning apparatus according to claim 8, wherein a time ti0 for moving the high-temperature point material from the discovery position to the treatment position satisfies the following formula:

v1: the running speed of the chain bucket type conveyor is in mm/s.

10. An activated carbon fume purification device high temperature detection-cooling treatment system applying the activated carbon fume purification device high temperature detection-cooling treatment method according to any one of claims 4 to 9, characterized in that the system comprises:

a material transporting line (1) for transporting materials;

a first observation device (2) arranged on a transport cover plate (103) of the material transport line (1);

a thermal imager (3) arranged above the transportation cover plate (103) and used for identifying high-temperature point materials through the first observation device (2);

The cooling device (4) is in signal connection with the thermal imager (3) and is arranged on the material conveying line (1) and used for cooling high-temperature materials;

the thermal imager (3) moves reciprocally around the first observation device (2) on a vertical plane where the central axis of the material conveying line (1) is located, the photosensitive part of the thermal imager (3) always points to the first observation device (2), and the thermal imager (3) acquires the material thermal imaging image from the first position area (A1) to the second position area (A2) on the material conveying line (1) through the first observation device (2);

the cooling device (4) is located downstream of the first viewing device (2).

11. The activated carbon fume cleaning device high temperature detection-cooling treatment system according to claim 10, wherein said first observation device (2) is a thermal imager observation hood; the thermal imaging camera observation cover includes: a side wall cover body (201), a top observation hole (202), a bottom observation hole (203), a front shielding plate (204) and a rear shielding plate (205);