阅读说明：本技术 隧道窑及码坯窑车焙烧状态和焙烧氛围控制、可追溯方法 (Tunnel kiln and method for controlling roasting state and roasting atmosphere of stacking kiln car and tracing ) 是由 张笠 刘洪波 陈荣生 杨长清 周云 贾韶辉 陈蕾 于 2020-11-24 设计创作，主要内容包括：本发明公开了一种隧道窑及码坯窑车焙烧状态和焙烧氛围控制、可追溯方法,适应于不同理化特性原料、水分及空心砌块、大尺寸装备式墙体材料等条件和工艺要求情况。本发明在窑车上编码,进窑时自动识别,对每台窑车上砖坯烧结情况和成品质量自动跟踪,及时调整隧道窑热工状态。烧结隧道窑上设置测温和测压一次仪表,检测窑内烧结热工参数入计算机控制单元,输出信号控制隧道窑头排烟风机、窑尾冷却风机和窑底平压风机的电机变频器以调整风机转速,从窑顶投煤孔辅以煤粉喷射装置自动少量添加煤粉,控制隧道窑工参数和燃烧气氛。本发明通过计算机进行质量跟踪,比较精准调节焙烧氛围,从而达到提高设备运转率、降低消耗、产量及质量得到提高的目的。(The invention discloses a tunnel kiln and a method for controlling and tracing the roasting state and the roasting atmosphere of a setting kiln car, which are suitable for the conditions and process requirements of raw materials with different physicochemical characteristics, water, hollow blocks, large-size equipment type wall materials and the like. The invention codes on the kiln cars, automatically identifies when entering the kiln, automatically tracks the green brick sintering condition and the finished product quality on each kiln car, and timely adjusts the thermal state of the tunnel kiln. A primary instrument for measuring temperature and pressure is arranged on the sintering tunnel kiln, the sintering thermal parameters in the kiln are detected and input into a computer control unit, output signals control a smoke exhaust fan at the head of the tunnel kiln, a cooling fan at the tail of the tunnel kiln and a motor frequency converter of a flat pressing fan at the bottom of the kiln so as to adjust the rotating speed of the fans, coal powder is automatically added in a small amount from a coal feeding hole at the top of the kiln by assisting a coal powder injection device, and the tunnel kiln parameters and the combustion atmosphere are controlled. The invention tracks the quality through the computer, adjust the roasting atmosphere more accurately, thus achieve the goal of raising the equipment running rate, reducing consumption, and improving yield and quality.)

1. The tunnel kiln of the brick sintering plant is characterized in that: the device comprises a sintering tunnel kiln (1), a setting kiln car (2), a tunnel kiln smoke exhaust fan (3), a tunnel kiln cooling fan (4), a tunnel kiln flat pressure fan (5), a pulverized coal injection device (7), a spraying and engraving digital label tag (8), a temperature measurement primary element (9), a pressure measurement primary element (10), a digital label identification device (11) and a computer control unit (12);

the sintering tunnel kiln (1) comprises a preheating zone, a roasting zone and a cooling zone which are sequentially distributed from the vehicle inlet end to the vehicle outlet end of the sintering tunnel kiln (1);

the blank stacking kiln car (2) is provided with a spraying and carving digital label (8), and a plurality of blank stacking kiln cars (2) are sequentially arranged along the length direction of the sintering tunnel kiln (1) and sequentially enter and exit the sintering tunnel kiln (1);

the tunnel kiln smoke exhaust fan (3) is arranged above the sintering tunnel kiln (1);

the tunnel kiln cooling fan (4) is arranged above the sintering tunnel kiln (1) and is close to a kiln tail cooling belt of the sintering tunnel kiln (1);

the tunnel kiln flat air pressing machine (5) is arranged below the sintering tunnel kiln (1);

the coal powder injection device (7) is arranged above the sintering tunnel kiln (1) and injects coal powder into the sintering tunnel kiln (1) through a coal injection hole;

the temperature measuring primary elements (9) are arranged at the kiln top of the sintering tunnel kiln (1), and the arranged areas cover a preheating zone, a roasting zone and a cooling zone;

the primary load cell (10) comprises a first pressure detection element positioned at the kiln top of the sintering tunnel kiln (1), a second pressure detection element positioned at the kiln bottom of the sintering tunnel kiln (1) and a third pressure detection element positioned in a smoke exhaust pipe;

the digital label identification device (11) is positioned at the vehicle inlet end of the sintering tunnel kiln (1);

the computer control unit (12) is electrically connected with the setting kiln car (2), the tunnel kiln smoke exhaust fan (3), the tunnel kiln cooling fan (4), the tunnel kiln flat pressure fan (5), the coal powder injection device (7), the temperature measurement primary element (9), the pressure measurement primary element (10) and the digital label identification device (11).

2. The tunnel kiln of a clinker plant of claim 1, wherein: and the tunnel kiln smoke exhaust fan (3), the tunnel kiln cooling fan (4) and the tunnel kiln flat pressing fan (5) are respectively and electrically connected with the frequency converter (6).

3. The tunnel kiln of a clinker plant of claim 1, wherein: the first pressure detection element and the second pressure detection element are positioned in a roasting zone in the sintering tunnel kiln (1).

4. The tunnel kiln of a clinker plant of claim 1, wherein: the number of the digital label identification devices (11) is two, and the two digital label identification devices (11) are respectively positioned on the left side and the right side of the moving path of the setting kiln car (2).

5. A method for controlling the roasting state and the roasting atmosphere of a setting kiln car of a sintering brick factory is characterized by comprising the following steps of: the brickyard tunnel kiln of claim 1, 2, 3, or 4, and comprising the steps of:

s1, making an ideal firing curve of the tunnel kiln in the computer control unit (12) by using configuration software;

s2, continuously feeding the green bricks into a sintering tunnel kiln (1) after the green bricks are fully stacked by a stacking kiln car (2), and identifying the real-time position of each stacking kiln car (2) in the sintering tunnel kiln (1) by a computer control unit (12) through a spraying and engraving digital label (8) arranged on the side surface of the stacking kiln car (2) and a digital label identification device (11) arranged at the car feeding end of the sintering tunnel kiln (1) according to the length of the sintering tunnel kiln (1) and the length of the stacking kiln car (2);

s3, a computer control unit (12) forms an actual firing curve formed in the actual production process corresponding to the position of the setting kiln car (2) through actual temperature parameters detected by a plurality of temperature measuring primary elements (9) on the sintering tunnel kiln (1), the ratio of the actual firing curve to an ideal firing curve is tracked, and when the actual firing curve deviates from the ideal firing curve, the computer control unit (12) sends a signal to control a tunnel kiln smoke exhaust fan (3) to adjust the firing temperature or drive a pulverized coal injection device (7) to put in pulverized coal;

s4, detecting the pressure in the kiln by the computer control unit (12) through the pressure measuring primary element (10), and controlling the combustion atmosphere through the tunnel kiln smoke exhaust fan (3), the tunnel kiln cooling fan (4) and the tunnel kiln flat pressure fan (5) to stabilize the kiln space pressure in the middle of the roasting zone and at the two ends of the roasting zone in the kiln at the position around the '0 pressure'.

6. The method for controlling the baking state and baking atmosphere of the setting kiln car of the sintering brick factory according to claim 5, characterized in that: and when the ideal firing curve is manufactured in the S1, according to the firing temperature and pressure parameter curves of each setting kiln car (2) displayed in real time by the computer control unit (12), aiming at the characteristics of different raw brick materials, judging the firing quality of the green bricks on the setting kiln cars (2), and modifying the ideal firing curve of the tunnel kiln.

7. The method for controlling the baking state and baking atmosphere of the setting kiln car of the sintering brick factory according to claim 6, characterized in that: the green brick raw material characteristics comprise physical and chemical properties of the green brick raw material, water content and green brick volume and size.

8. A traceable method for the roasting state and the roasting atmosphere of a setting kiln car in a sintering brick factory is characterized by comprising the following steps of: the tunnel kiln of the brick sintering factory is adopted to collect the temperature and pressure parameters in the tunnel kiln (1) in real time, generate an actual firing curve corresponding to each setting kiln car (2), and track the ratio of the actual firing curve to the ideal firing curve, so as to realize the traceability of the green brick firing quality on each setting kiln car (2).

Technical Field

The invention belongs to the technical field of electromechanical equipment, and particularly relates to an automatic control device and method for a sintering process in a brick sintering plant.

Background

At present, according to the definition of national green buildings, the method takes the guarantee of the safety and the quality of buildings as the basic aim of industrial development, saves resources to the maximum extent, actively expands the effective regeneration and application of various resources such as industrial tailings, coal gangue, fly ash, shale, foundation pit soil for buildings, building residue soil, sludge in rivers, lakes and channels, and the like, and is a main path for ensuring the sustainable development of the sintered wall material industry. Meanwhile, in the face of raw materials consisting of different components such as clay, shale, coal gangue, fly ash and the like, the front-end production process of the vacuum brick extruding machine has different conditions such as homogenization of material components, water content and the like due to different material treatment modes and water distribution conditions, and semi-finished products are extruded according to market conditions and the like to meet the requirements of solid bricks, hollow bricks and size difference. Along with the rapid development of economy in China, the brick and tile industry also steps into the development of express lanes, manual experience adjustment is carried out through post workers manually observing in the traditional running process, accurate prevention means is lacked, and product quality is affected.

By combining the current supply side reform of the country and the current new technology development trend, a system scheme for realizing the traceable adjustment of the quality through the automatic control of computer software is needed to be developed, and the purposes of improving the equipment operation rate, reducing the consumption and improving the yield and the quality are achieved. The scheme can be used in a newly-built production line and can be used in old equipment in a modified mode.

Disclosure of Invention

In order to solve the technical problems, the invention provides a tunnel kiln and a method for controlling and tracing the roasting state and the roasting atmosphere of a setting kiln car, which can solve the problems in the prior art, improve the operation rate of equipment, reduce the consumption, improve the yield and ensure the traceability of the quality.

The invention is realized by the following technical scheme.

A tunnel kiln of a brick sintering factory comprises a sintering tunnel kiln, a setting kiln car, a tunnel kiln smoke exhaust fan, a tunnel kiln cooling fan, a tunnel kiln flat pressure fan, a pulverized coal injection device, a spraying and carving digital label tag, a temperature measurement primary element, a pressure measurement primary element, a digital label identification device and a computer control unit;

the sintering tunnel kiln comprises a preheating zone, a roasting zone and a cooling zone which are sequentially distributed from the vehicle inlet end of the sintering tunnel kiln to the vehicle outlet end;

the stacking kiln cars are provided with spraying and carving digital label tags, and the plurality of stacking kiln cars are sequentially arranged along the length direction of the sintering tunnel kiln and sequentially enter and exit the sintering tunnel kiln;

the tunnel kiln smoke exhaust fan is arranged above the sintering tunnel kiln;

the tunnel kiln cooling fan is arranged above the sintering tunnel kiln and close to a kiln tail cooling belt of the sintering tunnel kiln;

the tunnel kiln flat air blower is arranged below the sintering tunnel kiln;

the coal powder injection device is arranged above the sintering tunnel kiln and injects coal powder into the sintering tunnel kiln through the coal injection hole;

the temperature measuring primary elements are arranged at the kiln top of the sintering tunnel kiln, and the arrangement area covers the preheating zone, the roasting zone and the cooling zone;

the primary load cell comprises a first pressure detection element positioned at the kiln top of the sintering tunnel kiln, a second pressure detection element positioned at the kiln bottom of the sintering tunnel kiln and a third pressure detection element positioned in the smoke exhaust pipe;

the digital label identification device is positioned at the entering end of the sintering tunnel kiln;

the computer control unit is electrically connected with the setting kiln car, the tunnel kiln smoke exhaust fan, the tunnel kiln cooling fan, the tunnel kiln flat pressure fan, the pulverized coal injection device, the temperature measuring primary element, the pressure measuring primary element and the digital label identification device.

Preferably, the sprayed and engraved digital label tag comprises a two-dimensional code, and relevant information of the code blank kiln car, including serial number information, material information and the like, is read in a two-dimensional code form.

Preferably, the tunnel kiln smoke exhaust fan, the tunnel kiln cooling fan and the tunnel kiln flat pressure fan are respectively and electrically connected with the frequency converter.

Preferably, the first pressure detecting element and the second pressure detecting element are located in a firing zone in the sintering tunnel kiln.

Preferably, the number of the digital label identification devices is two, and the two digital label identification devices are respectively positioned on the left side and the right side of the moving path of the setting kiln car.

A method for controlling the baking state and the baking atmosphere of a setting kiln car of a sintering brickyard adopts the tunnel kiln of the sintering brickyard and comprises the following steps:

s1, making an ideal firing curve of the tunnel kiln in a computer control unit by using configuration software, wherein the ideal firing curve is not fixed and is adjusted according to an actual firing curve and the characteristics of raw materials of the green bricks;

s2, after the setting kiln car is fully set, the green bricks continuously enter the sintering tunnel kiln, and the computer control unit identifies the real-time position of each setting kiln car in the sintering tunnel kiln according to the length of the sintering tunnel kiln and the length of the setting kiln car through a spraying and carving digital label arranged on the side surface of the setting kiln car and a digital label identification device arranged at the feeding end of the sintering tunnel kiln;

s3, the computer control unit corresponds to the position of the setting kiln car to form an actual firing curve formed in the actual production process through actual temperature parameters detected by a plurality of temperature measuring primary elements on the sintering tunnel kiln, and ratio tracking is carried out on the actual firing curve and the ideal firing curve;

s4, the computer control unit detects the pressure in the kiln through the pressure measuring primary element, and controls the combustion atmosphere through the tunnel kiln smoke exhaust fan, the tunnel kiln cooling fan and the tunnel kiln flat pressure fan, so that the kiln space pressure in the middle of the roasting zone and at the two ends of the roasting zone in the kiln is stabilized at the position around the '0 pressure'. The "0 pressure" point means that the roasting zone in the sintering tunnel kiln is relatively stable, and the blowing and draft pressures are "0", and "left and right" means approximately equal to each other. The tunnel kiln smoke exhaust fan performs negative pressure air exhaust, the tunnel kiln cooling fan performs positive pressure air supply, and the tunnel kiln flat pressing fan is mainly used for large-span tunnel kiln bottom pressure equalization.

Preferably, when the ideal firing curve is prepared in S1, the ideal firing curve of the tunnel kiln is modified based on the determination of the firing quality of the green bricks on the stacking kiln car for the characteristics of different green brick raw materials according to the firing temperature and pressure parameter curves of each stacking kiln car that are presented in real time by the computer control unit. Namely a computer control unit (which can display the baking temperature and pressure parameter curves of each setting kiln car in real time, and modify the ideal baking curve of the tunnel kiln based on the green brick baking quality judgment on the setting kiln car aiming at the conditions of physicochemical characteristics, water content, green brick volume and size and the like of different green brick raw materials.

Further, the green brick raw material characteristics include physical and chemical characteristics of the green brick raw material, water content and green brick bulk size.

A method for tracing the baking state and baking atmosphere of a setting kiln car of a sintering brick factory is characterized in that the temperature and pressure parameters in the sintering tunnel kiln are collected in real time by adopting the tunnel kiln of the sintering brick factory, an actual baking curve is generated corresponding to each setting kiln car, and the ratio of the actual baking curve to an ideal baking curve is tracked, so that the traceability of the baking quality of a brick blank on each setting kiln car is realized, namely the traceability of the baking quality of the brick blank on each setting kiln car is realized by tracking the ratio of the actual baking curve generated by the parameters detected in S3 and S4 to the ideal baking curve.

When the computer control unit is used for manufacturing an ideal firing curve through configuration software, adjustment is made through accurate tracing of green brick quality, and the method is suitable for conditions and process requirements of different material components, moisture, hollow blocks, large-size equipment type wall materials and the like.

The invention discloses a tunnel kiln and a method for controlling and tracing the roasting state and the roasting atmosphere of a setting kiln car, and relates to a sintering tunnel kiln, a setting kiln car, a fan, a frequency converter, a spraying and carving digital label tag, a temperature measuring and pressure measuring primary element, a coal powder spraying device, a computer control unit and the like.

The tunnel kiln for sintering in brickyard is divided into preheating zone, roasting zone and cooling zone, and the tunnel kiln sintering thermal system includes temperature system, pressure system, etc.

The method comprises the steps of installing labels for spraying and carving label labels on the side faces of kiln cars, arranging a label identification device at the car inlet end outside a tunnel kiln, continuously feeding the kiln cars into the tunnel kiln by a car pusher, identifying the real-time position in each kiln car kiln by a computer control unit according to the lengths of the tunnel kiln and the kiln cars, automatically generating a firing state curve of each kiln car, realizing traceability of a green brick firing atmosphere on each kiln car according to the quality of green bricks discharged from the kiln, adjusting an ideal firing curve of different raw materials, moisture and green brick sizes in real time, and automatically tracking and adjusting the firing atmosphere in the kiln by adopting the following temperature and pressure control mode.

Temperature control: preheating and heating the preheating zone, wherein the temperature of the initial parking space is not more than 100-105 ℃, and the temperature of the initial parking space is lower than 600 ℃ and belongs to the preheating zone; the roasting zone comprises two links of roasting and heat preservation, the roasting temperature is generally set to be about 1050 ℃, and the heat preservation is carried out for 4-8 hours; temperatures below 800 ℃ are generally in the cooling zone. The tunnel kiln top is provided with a plurality of thermocouples for detecting the firing temperature, automatically tracking an ideal firing curve, adjusting the rotating speed of a motor through a frequency converter of a kiln head smoke exhaust fan and a kiln tail cooling fan, adding a small amount of coal powder into a coal powder injection device on the top of a firing zone and the like.

And (3) pressure control: the pressure in the kiln determines the moving state of gas flowing in the kiln, so that the heat exchange is influenced, the pressure in the kiln is different in different combustion stages, and the negative pressure in the kiln is relatively large because the low-temperature and medium-temperature stages at the front ends of a preheating zone and a roasting zone adopt negative pressure pumping; after entering a roasting zone, the suction force is smaller in a high-temperature stage, so that a micro-negative pressure or micro-positive pressure state is formed, and the pressure in the middle of the roasting zone and the pressure at two ends of the roasting zone in the kiln are stabilized at the positions around a '0 pressure' point in principle; in the cooling stage, positive pressure is formed due to the blowing of the kiln tail. 2-5 flat blowers are uniformly arranged at the bottom of the tunnel kiln in parallel and are mainly used for pressure equalization at the bottom of the large-span tunnel kiln. The process adopts a computer control unit to detect and control the running state of a fan on the kiln through a pressure transmitter so as to balance pressure parameters.

Compared with the prior art, the method utilizes the detection element in the firing tunnel kiln to generate two actual firing curves, one curve is used for controlling the firing atmosphere in the firing tunnel kiln, and the other curve is used for recording the firing process of the setting kiln car. The invention has the advantages that: the baking state of each setting kiln car is accurately tracked, and the control is automatically controlled by computer software, so that the method has certain adaptability to the green brick baking conditions and process requirements. The whole tunnel kiln firing system is used as a system to optimize automatic adjustment, so that the purposes of improving the equipment operation rate, reducing consumption, improving yield and quality and increasing the economic benefit of enterprises are achieved.

Drawings

FIG. 1 is a schematic view of a sign plate with a sprayed digital label mounted on a setting kiln car;

FIG. 2 is a schematic diagram of a tunnel kiln temperature firing curve;

FIG. 3 is a schematic structural diagram of a control device of a tunnel kiln real-time traceable thermal system;

FIG. 4 is a schematic cross-sectional view taken along line B-B in FIG. 3;

FIG. 4-1 is an enlarged schematic view of area A of FIG. 4;

FIG. 4-2 is an enlarged schematic view of region B of FIG. 4;

FIG. 4-3 is an enlarged schematic view of region C of FIG. 4;

4-4 are enlarged schematic views of region D in FIG. 4;

in the figure: the device comprises a sintering tunnel kiln-1, a setting kiln vehicle-2, a tunnel kiln smoke exhaust fan-3, a tunnel kiln cooling fan-4, a tunnel kiln flat pressure fan-5, a frequency converter-6, a pulverized coal injection device-7, an injection digital label-8, a temperature measurement primary element-9, a pressure measurement primary element-10, a digital label identification probe-11 and a computer control unit-12.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made based on the common technical knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.

The technical scheme of the invention is further described below, specifically, 70 setting kiln cars 2 are described according to a sintering tunnel kiln 1 with a 6.9-meter section span, a single setting kiln car 2 is 4.35 meters long, 70 setting kiln cars 2 continuously enter the sintering tunnel kiln 1, the length of the sintering tunnel kiln 1 corresponds to the parking space length of 33 setting kiln cars 2 (namely, the sintering tunnel kiln is divided into 33 parking space areas according to the parking spaces of the kiln cars), the numerical serial number of the side surface of the setting kiln car 2 in fig. 4-1-4 and the numerical serial number in the square frame above the setting kiln car 2 represent parking spaces of 1-33, namely, only 33 setting kiln cars 2 can be simultaneously accommodated in the sintering tunnel kiln 1, and the rest setting kiln 2 waits outside the sintering tunnel kiln 1 to circularly enter. It is to be noted that the scope of protection of the invention is not limited to the dimensions and quantities.

As shown in fig. 1, a side rough drawing of the setting kiln car 2 is shown, a spraying and engraving digital label 8 with a two-dimensional code is installed on the side of the head of the setting kiln car 2, and the spraying and engraving digital label 8 is provided with the two-dimensional code containing all production information of the setting kiln car 2.

As shown in fig. 2: the temperature firing curve of the tunnel kiln is shown, which is an ideal temperature firing curve, and the abscissa represents the position of the parking space of the setting kiln car 2 in the sintering tunnel kiln 1.

As shown in fig. 3, 4-1, 4-2, 4-3, and 4-4: a total of 16 constantan thermocouples, namely 6 constantan thermocouples, 3 constantan thermocouples and 7 constantan thermocouples, are arranged on a preheating zone, a roasting zone and a cooling zone of the kiln top of a sintering tunnel kiln 1 and used as a temperature measuring primary element 9, actual parameters detected by the temperature measuring primary element 9 are input into a computer control unit 12 to form an actual sintering curve (namely the actual sintering curve in the sintering tunnel kiln 1) formed in the actual production process, the ratio of the actual sintering curve to an ideal sintering curve is used for tracking, and an abnormal condition is timely sent out to control 1 rated parameter in the sintering tunnel kiln 1 to be the air quantity of 149778m³And a frequency converter 6 of the tunnel kiln smoke exhaust fan 3 with the pressure of 1174Pa and the motor power of 75kw adjusts the firing temperature by controlling the rotating speed of the motor, and when the temperature is too low, a small amount of coal powder is added by a coal powder injection device 7 on a firing belt of the sintering tunnel kiln 1.

2 micro differential pressure transmitters are arranged at the top and the bottom of a roasting zone of a sintering tunnel kiln 1 and used as primary pressure measuring elements 10 to detect the pressure in the kiln (namely the pressure difference between the kiln top of the sintering tunnel kiln 1 and the bottom of a setting kiln car 2), and the air quantity is adjusted by a frequency converter 6 of a tunnel kiln flat pressure fan 5 to control the combustion atmosphere, so that the kiln space pressure in the middle of the roasting zone in the kiln and at the two ends of the roasting zone is stabilized at the position around a '0 pressure' point. Adopts 1 rated parameter of 149778m³Perh, pressure 1174Pa, motor power 75kW tunnel kiln smoke exhaust fan 3 negative pressure air exhaust, 4 rated parameters are adopted for air quantity 32389m³The tunnel kiln cooling fan 4 with the pressure of 372Pa and the motor power of 7.5kW supplies air under positive pressure, and adopts 3 rated parameters of the air quantity of 46700m³The tunnel kiln flat air blower 5 with the pressure of 262Pa and the motor power of 7.5KW is used for balancing the bottom pressure of the tunnel kiln.

A main air pipeline of a tunnel kiln smoke exhaust fan 3 is provided with 1 constantan thermocouple which is used as a temperature measuring primary element 9 for protecting the fan and giving an alarm; and a primary pressure measuring element 10 is arranged on a main air pipeline of the smoke exhaust fan 3 of the tunnel kiln and is used for controlling a frequency converter 6 corresponding to the smoke exhaust fan 3.

Spraying and engraving digital label tags 8 on the side surfaces of 70 setting kiln cars 2, two digital label identification probes 11 are arranged at the car inlet end outside a sintering tunnel kiln 1, the setting kiln cars 2 are continuously sent into the sintering tunnel kiln 1 by a car pusher, according to the length of the sintering tunnel kiln 1 and the length of the setting kiln cars 2, a computer control unit 12 identifies the real-time position of each setting kiln car 2 in the kiln, and automatically generates the firing state curve of each setting kiln car 2, so that the traceability of the firing quality of green bricks on each setting kiln car 2 is realized, and the specific process is as follows: when a unburned brick kiln car 2 enters from the entering end of a sintering tunnel kiln 1, a digital label identification probe 11 at the entering end of the sintering tunnel kiln 1 reads two-dimensional code information on a sprayed digital label 8 on the side surface of the unburned brick kiln car 2, at this time, a computer control unit 12 starts timing for the unburned brick kiln car 2, since the moving speed and the length of the unburned brick kiln car 2 are known, the position (namely one of 33 parking spaces) in the burning tunnel kiln 1 when the unburned brick kiln car 2 is at a certain moment can be calculated according to a preset time interval of an operator, then the temperature value of a temperature measurement primary element 9 closest to the position (parking space) is read (in the embodiment, 33 temperature measurement primary elements 9 are not allocated according to 33 parking spaces, so that the closest distance principle is adopted), finally, the temperature values are taken as longitudinal coordinates, and the parking space position is taken as a horizontal coordinate, an actual firing curve similar to that of fig. 2 was generated.

The computer control unit 12 realizes the technical parameter setting and the display of the relevant parameters of the control system through a human-computer interface dialogue device, automatically generates a real-time (actual) firing state curve of the sintering tunnel kiln 1 and an actual firing curve of each setting kiln car 2, tracks the comparison between an ideal firing curve and the actual firing curve to realize automatic closed-loop control, traces the curing of the firing process curve of each setting kiln car 2 according to the quality of the fired green bricks by the ideal firing curve, and has certain adaptability to different requirements of green brick firing conditions and processes.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.