Pellet chain intelligent production line control system

Abstract

The utility model discloses a pellet chain intelligent production line control system, which comprises a material preparation control system, a pelletizing control system, a roasting control system and a finished pellet conveying control system which are arranged on a production site, and a master control system which is arranged in a central control room and is connected with the systems, the material preparation control system comprises a material distribution control system, a drying control system and a material distribution control system; the pelletizing control system comprises a disc pelletizing control system and a screening control system; the roasting control system comprises a chain grate control system, a rotary kiln control system, a receiving hopper control system and an annular cooler control system; the finished product ball conveying control system comprises online moisture detection devices and finished product ball online compression resistance detection equipment which are arranged along each finished product ball conveying belt at intervals; the pellet chain intelligent production line control system is matched with a corresponding intelligent control system based on a flow type production device required by pellet production, so that batch production of high-yield pellets is realized while intelligent pellet production is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous monitoring of a pellet chain production process, in particular to a pellet chain intelligent production line control system. Background Art

[0002] Currently, the various process sections of the pelletizing production line are independent of each other. Due to the lack of effective detection and control methods, the degree of automation control in each process section is low, requiring on-site manual operation, delayed adjustment and control, high labor intensity for workers, and difficulty in improving production quality.

[0003] Currently, the batching process requires manual adjustment of feed volume to ensure proper proportions. Raw material drying requires manual measurement of moisture content to adjust the drying temperature. The degree of drying is not factored into subsequent pelletizing production. Insufficient drying results in a low pelletizing yield and excessive moisture content in the raw pellets, while overdrying wastes energy and increases production costs. Mixed material conveying and distribution is entirely manual, requiring constant illumination of each silo to monitor material levels and manually adjust the height of the discharger to distribute the material. This requires extensive work and creates an extremely harsh working environment.

[0004] Currently, the pelletizing process relies primarily on manual operation, including water distribution, feed volume, and pelletizing disc speed. Pelletizing workers rely on their experience and vision to distinguish and adjust these processes. On-site operators also conduct patrol inspections of the pelletizing area, manually remove large balls and lumps from the pelletizing disc, manually clean the pelletizer's chute, and inspect and even monitor the roller screen to promptly remove foreign objects and prevent jams. There is a lack of quality and yield monitoring methods for raw pellet production, resulting in crude production statistics and a lack of guidance for process improvements and energy conservation and consumption reduction.

[0005] Currently, the raw ball distribution controller relies on manual adjustment, with little adjustment during the production process, resulting in uneven distribution of material in the grate. The grate material thickness is detected using a point measurement method, which has poor accuracy and cannot reflect the uniformity of the distribution. The grate operation requires manual monitoring to promptly detect abnormalities and manually reset them. There is also a lack of reliable basis for formulating maintenance plans for the grate and rotary kiln. There is also a lack of monitoring of the material condition during the sintering process and online monitoring of the strength of the finished pellets. Therefore, to address the many issues existing in the pellet production line, it is necessary to design a supporting intelligent control system that can not only realize the intelligence of the entire pellet production process, but also achieve the mass production of qualified pellets. Utility Model Content

[0006] The purpose of the utility model is to provide a pellet chain intelligent production line control system that solves the above technical problems.

[0007] To this end, the technical solution of this utility model is as follows:

[0008] A pellet chain intelligent production line control system includes a material preparation control system, a pelletizing control system, a roasting control system and a finished ball conveying control system arranged at the production site, and a master control system arranged in a central control room; wherein, the material preparation control system includes a batching control system for realizing the proportional configuration of different types of raw materials, a drying control system for drying the mixed raw materials to a specified moisture content, and a material distribution control system for storing and directionally conveying the dried pelletizing mixture; the pelletizing control system includes a disc pelletizing control system for controlling the particle size of raw balls, and a screening control system for screening the raw balls delivered by the pelletizing disc for particle size; the roasting control system includes a chain grate control system for controlling the thickness of the ball material, a rotary kiln control system for monitoring the temperature state of the rotary kiln skin, a receiving hopper control system for monitoring the material level of the receiving hopper, and a ring cooler control system for monitoring the temperature state of the four ring cooling sections of the ring cooler; the finished ball conveying control system includes an online compression resistance detection device for finished balls arranged on the finished ball conveyor belt; the master control system is respectively connected to the material preparation control system, the pelletizing control system, the roasting control system and the finished ball conveying control system.

[0009] Furthermore, in the material preparation control system,

[0010] The batching control system includes: multiple raw material silo weighing devices, which are respectively arranged in a one-to-one correspondence at the support part of each raw material silo to collect the weight of the material in the silo in real time. Each raw material silo weighing device is also connected to the master control system, so that the master control system can monitor the discharge status and remaining material weight of each raw material silo in real time; multiple batching belt scales, which are respectively installed in a one-to-one correspondence at the middle section of the conveyor belt below the discharge end of each raw material silo to measure and weigh the materials lowered from the raw material silo to the conveyor belt. The master control system is connected to each batching belt scale and the screw feeder of each raw material silo to control the start and stop and speed of the screw feeder according to the cumulative weight of the material on the batching belt scale.

[0011] The drying control system includes: a first online moisture detection device and a second online moisture detection device, which are respectively installed at the feed and discharge ends of the dryer to monitor the original moisture content and initial moisture content of each conveyed batch of materials in real time. The two online moisture detection devices are also connected to the master control system, allowing the master control system to obtain the moisture content of each conveyed batch of materials before and after drying in real time; a dryer process data acquisition system, which is connected to the master control system, allowing the master control system to adjust the dryer process data based on the monitoring results of the two online moisture detection devices and the current process data of the dryer;

[0012] The material distribution control system includes: a multi-stage belt conveyor device, wherein the input end of the conveyor belt for material input is arranged at the discharge port of the dryer, and the conveyor belt for material output is arranged above the feed port of multiple pelletizing disk mixing silos, and the dried mixed material is conveyed to the designated pelletizing disk silo through a discharger arranged at the feed port; the controller of the multi-stage belt conveyor device is connected to the main control system, so that the main control system controls the dried material to be fed into the designated pelletizing disk mixing silo; multiple pelletizing disk mixing silo weighing devices are respectively arranged on the support part of each pelletizing disk mixing silo to collect the weight of the mixed material in the silo in real time; each pelletizing disk mixing silo weighing device is also respectively connected to the main control system, so that the main control system monitors the discharge status and residual material weight of each pelletizing disk mixing silo in real time.

[0013] Furthermore, a vibration device is provided on the outer wall of each raw material bin and pelletizing disk mixing bin, and each vibration device is connected to the master control system respectively, so that the master control system starts the corresponding vibration device when it detects that the material bin is not unloaded smoothly.

[0014] Furthermore, the dryer process data acquisition system includes: a first temperature sensor, which is arranged in the smoke hood of the dryer to collect the smoke hood temperature in real time; a second temperature sensor, which is arranged in the combustion chamber where the burner is located to collect the temperature of the combustion chamber; a third temperature sensor, which is arranged at the dust collector inlet of the dryer to collect the flue gas temperature at the dust collector inlet in real time; a first pressure sensor, which is arranged on the combustion-supporting air duct of the dryer to collect the gas pressure in the combustion-supporting air duct in real time; a second pressure sensor, which is arranged on the gas main of the dryer to collect the gas pressure in the gas main in real time; a first flow sensor, which is arranged on the combustion-supporting air duct of the dryer to collect the The gas flow in the combustion-supporting air duct; the second flow sensor, which is arranged on the gas main of the dryer to collect the gas flow in the gas main in real time; the flame detector, the detection object is the burner, to monitor the flame combustion situation in the burner in real time; the first electric-controlled valve, which is installed on the gas main to control the gas flow in the gas main; the second electric-controlled valve, which is installed on the combustion-supporting air duct to control the flow of the combustion-supporting gas in the combustion-supporting air duct; each temperature sensor, each pressure sensor, each flow sensor, each burner controller and each electric-controlled valve are respectively connected to the main control system, so that the main control system adjusts the working status of the burner controller and the two electric-controlled valves according to the monitoring information of the sensor.

[0015] Furthermore, in the pelletizing control system,

[0016] The disc pelletizing control system includes: multiple mixed material belt scales, which are respectively installed one by one in the middle section of the ball material conveyor belt below the discharge end of each pelletizing disc silo to measure and weigh the materials discharged from the pelletizing disc mixed material silo. The master control system is connected with each mixed material belt scale and the screw feeder of each pelletizing disc silo to control the start and stop and speed of the screw feeder according to the real-time weight of the material on the mixed material belt scale; the pelletizing particle size control system includes multiple first online particle size analysis systems, multiple second online particle size analysis systems and multiple ball scooping devices; the multiple first online particle size analysis systems are respectively arranged one by one above the pelletizing disc and correspond to the large growth area in the pelletizing disc; each first The online particle size analysis system is connected to the master control system to feedback and adjust the process parameters of the corresponding disc pelletizing machine and water addition control system based on the detected raw ball particle size distribution and particle size change trend; multiple second online particle size analysis systems are respectively arranged one by one above the pelletizing disc and corresponding to the pelletizing area in the pelletizing disc. Each second online particle size analysis system is connected to the master control system so that the master control system can obtain the size distribution and quantity of large balls in the pelletizing area; multiple ball scooping devices are respectively arranged one by one on one side of the pelletizing area of ​​the pelletizing disc of each disc pelletizing machine through a mechanical arm. Each mechanical arm is connected to the master control system to start and stop the ball scooping device according to the presence of large balls in the pelletizing area and to clean the large balls;

[0017] The screening control system includes: multiple roller screening devices, which are respectively arranged at the discharge port of the pelletizing disc; each roller screening device is provided with a small ball screening section, a qualified ball screening section and a large ball screening section in sequence along the raw ball conveying direction, and each screening section is controlled to control the small balls, qualified balls and large balls in the raw balls to fall in sequence in different screening sections by setting the distance between adjacent screening rollers; a collecting hopper is provided below the small ball screening section and the large ball screening section, and a raw ball conveyor belt is provided below the qualified ball screening section; the third online moisture detection device is arranged on the adjacent side of the raw ball conveyor belt, and a manipulator is also provided on the adjacent side of the third online moisture detection device, so that the raw balls on the raw ball conveyor belt can be randomly grabbed by the manipulator and put into the third online moisture detection device for moisture detection.

[0018] Furthermore, the disc pelletizing control system also includes multiple water addition control systems, which are installed one by one above each disc pelletizing machine; each water supply device includes a first water supply pipeline and a second water supply pipeline arranged in parallel above the pelletizing disc, and the water inlet ends of the two are connected to the water supply main; the first water supply pipeline is provided with multiple drip nozzles, and the second water supply pipeline is provided with multiple atomizing nozzles; each water supply pipeline is provided with an electromagnetic flowmeter to measure the actual water supply of the water supply pipeline; an electric control valve is also provided at the connection between each water supply pipeline and the water supply main to control the water supply on the water supply pipeline; the main control system is respectively connected to the electric control valve and the electromagnetic flowmeter on each water supply pipeline to control the opening and closing state of the electric control valve according to the drip water demand and mist water demand of the pelletizing material, so as to realize fixed-point and quantitative water addition.

[0019] Furthermore, each roller screening device also includes a large ball crushing device, which is arranged at the tail end of the large ball screening section and can be located above the large ball collection hopper; the large ball crushing device is composed of two crushing rollers that rotate in opposite directions through a driving motor to crush various types of ball materials that roll down to the tail end of the large ball screen; the driving motor in the large ball crushing device is connected to the main control system to be automatically started by the main control system when the disc pelletizing machine is discharging materials; the multi-stage belt conveyor device also includes a return conveyor belt arranged below the small ball collection hopper and the large ball collection hopper, one end of which is arranged below the discharge port of the small ball collection hopper and the large ball collection hopper, and the other end is located above any mixed material conveyor belt, and the mixed material conveyor belt is arranged below the discharge port of the pelletizing disc silo and between the corresponding disc pelletizing machine silo.

[0020] Furthermore, in the roasting control system,

[0021] The chain grate control system includes: a green ball material thickness detection system, which is arranged on the feeding side of the chain grate to obtain the green ball distribution status; a master control system connected to the green ball material thickness detection system and the chain grate speed regulator to adjust the chain grate speed according to the current green ball distribution status; a third online particle size analysis system, which is arranged on the feeding side of the chain grate to obtain the green ball distribution particle size distribution; the third online particle size analysis system is connected to the master control system, so that the master control system calculates the preheating temperature of the chain grate based on the current green ball distribution particle size distribution;

[0022] The rotary kiln control system includes a kiln lining temperature monitoring system, which is installed adjacent to the rotary kiln to monitor the temperature of each area on the circumferential kiln lining in real time. The kiln temperature monitoring system is connected to the main control system, so that when the main control system detects abnormal temperature, it can quickly locate the abnormal kiln lining position and corresponding temperature.

[0023] The receiving hopper control system includes: a material level detection system, which is installed above the receiving hopper to monitor the ball material level in the receiving hopper. The material level detection system is connected to the main control system, so that the main control system can feed the ball material to the ring cooler when there is ball material in the receiving hopper;

[0024] The ring cooling control system includes four thermal imaging temperature monitoring devices installed in each ring cooling machine. The four devices are respectively installed in the four ring cooling sections of the ring cooling machine to monitor the temperature of each ring cooling section in real time. Each thermal imaging temperature monitoring device is connected to the master control system so that the master control system can intervene in time when it detects abnormal temperature in any ring cooling section on any ring cooling machine.

[0025] Furthermore, the chain grate control system also includes an equipment usage status monitoring system, which includes a thermal imaging temperature monitor, a pellet chain grate plate status monitoring system and a pellet chain grate bar status monitoring system respectively arranged in each chain grate. The three are respectively connected to the master control system so that the master control system can handle the abnormal status in time when it detects it.

[0026] Furthermore, in the finished ball conveying control system, a robot is provided adjacent to each finished ball online compression resistance testing device, so that the robot can randomly grab the finished balls on each finished ball conveyor belt and put them into the finished ball online compression resistance testing device for compression resistance performance testing.

[0027] Compared with the existing technology, the pellet chain intelligent production line control system is based on the process-type production equipment required for pellet production and is equipped with a corresponding intelligent control system, so as to achieve intelligent production of pellets while realizing mass production of pellets with high qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the pellet chain intelligent production line control system of the utility model;

[0029] Figure 2 This is a schematic diagram of the material preparation control system of the pellet chain intelligent production line control system of the present invention;

[0030] Figure 3 This is a schematic diagram of the pelletizing control system of the pelletizing chain intelligent production line control system of the present invention;

[0031] Figure 4 This is a schematic diagram of the roasting control system of the pellet chain intelligent production line control system of the present invention.

[0032] Figure 5 This is a schematic diagram of the large ball crushing device of the pellet chain intelligent production line control system of the present utility model. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following embodiments are by no means intended to limit the present invention in any way.

[0034] See also Figure 1 The pellet chain intelligent production line control system includes a material preparation control system, a pelletizing control system, a roasting control system and a finished pellet conveying control system set up at the production site, as well as a master control system set up in the central control room;

[0035] See also Figure 2 The material preparation control system includes the batching control system, the drying control system, the grinding control system and the material distribution control system.

[0036] The batching control system includes multiple raw material silo weighing devices, multiple batching belt scales and multiple vibrating devices; wherein the number of raw material silo weighing devices, batching belt scales and vibrating devices is the same as the number of raw material silos.

[0037] On the pelletizing chain intelligent production line, the raw material silos used for ore blending are divided into mineral powder silos and bentonite silos, which are respectively used to supply mineral powder and bentonite for making pellets; the discharge end of each raw material silo discharges materials stably under the action of its configured screw feeder, and correspondingly, a raw material conveyor belt is provided under the discharge end of each raw material silo to transport the materials lowered onto the raw material conveyor belt to the dryer.

[0038] Multiple raw material silo weighing devices are installed on each silo support, corresponding to each other, to collect the weight of the materials in the silo in real time. The master control system and each silo weighing device monitor the weight variables of the materials in each silo to confirm the discharge status of the silo. The master control system monitors the weight of the remaining materials and promptly suspends the feed to the silo and replenishes the materials.

[0039] Multiple batching belt scales are installed in the middle section of the raw material conveyor belt, located below the discharge end of each raw material silo. These scales measure and weigh the material released from the silos onto the conveyor belt, ensuring that the different materials discharged from different silos are delivered to the dryer in precisely proportioned proportions. Compared to the traditional method of estimating material proportions based on material discharge speed on the original production line, this method offers greater accuracy and ultimately a higher yield in pelletization. The master control system, connected to each batching belt scale and the screw feeder in each raw material silo, controls the start, stop, and speed of the screw feeder based on the accumulated weight of the material on the scale, ensuring that the weight ratio of the different types of material in each conveying batch matches the designed material ratio.

[0040] On the pellet chain intelligent production line, the discharge end of each raw material silo occasionally has the problem of poor material discharge (that is, the material amount in the silo is sufficient, but the discharge amount is too low). Therefore, a vibrating device is provided on the outside of each raw material silo to promote smooth material discharge by vibrating the outer wall of the raw material silo; each vibrating device is connected to the main control system respectively, so that when the main control system monitors that the material weight variable in the raw material silo in the discharge state is too low and the remaining material amount is sufficient, the vibrating device of the raw material silo is started to promote the resumption of normal material discharge.

[0041] The drying control system is used to control the process parameters of multiple dryers in the drying system to continuously dry the conveyed materials, control the moisture content of the mixed materials, and ensure the subsequent ball quality; specifically, the drying control system includes a first online moisture detection device, a dryer process data acquisition system and a second online moisture detection device.

[0042] In the drying system of the pellet chain intelligent production line, different types of materials are fed into the dryer in proportion for drying. The first online moisture detection device is set at the feed end of the dryer to monitor the original moisture content of the materials in the conveying batch in real time. The second online moisture detection device is set at the discharge end of the dryer to monitor the initial moisture content of the materials in the conveying batch after drying in real time. The two online moisture detection devices are also connected to the main control system respectively, so that the main control system can obtain the moisture content of each conveying batch of materials before and after drying in real time, which serves as a reference for the water supply of the water supply device in the subsequent pelletizing system, and reversely adjusts the drying process parameters of the drying system according to the subsequent actual pelletizing situation. This is because when different conditions are set for the initial moisture content of the mixed material and the water supply for pelletizing, it has a great influence on the subsequent pelletizing quality.

[0043] In the drying system of the pellet chain intelligent production line, the drying condition of the material moisture by the dryer is determined by multiple factors such as the burner temperature, gas supply, combustion-supporting air supply, etc.; based on this, the dryer process data acquisition system includes: a first temperature sensor, a second temperature sensor, a third temperature sensor, a first pressure sensor, a second pressure sensor, a first flow sensor, a second flow sensor, a flame detector, a first electrically controlled valve, and a second electrically controlled valve; specifically, the first temperature sensor is arranged in the smoke hood of the dryer to collect the smoke hood temperature in real time; the second temperature sensor is arranged in the combustion chamber where the burner is located to collect the temperature of the combustion chamber; the third temperature sensor is arranged at the dust collector inlet of the dryer to collect the dust collector inlet flue gas temperature in real time; the first pressure sensor is arranged on the combustion-supporting air duct of the dryer to collect the gas pressure in the combustion-supporting air duct in real time; the second pressure sensor is arranged on the gas main of the dryer, to collect the gas pressure in the gas main in real time; the first flow sensor is arranged on the combustion-supporting air duct of the dryer to collect the gas flow in the combustion-supporting air duct in real time; the second flow sensor is arranged on the gas main of the dryer to collect the gas flow in the gas main in real time; the flame detector detects the burner to monitor the flame combustion condition in the burner in real time; the first electric control valve is installed on the gas main to control the gas flow in the gas main; the second electric control valve is installed on the combustion-supporting air duct to control the flow of the combustion-supporting gas in the combustion-supporting air duct; each temperature sensor, each pressure sensor, each flame intensity heat flow sensor, each flow sensor, burner controller and each electric control valve are respectively connected to the master control system to transmit the dryer process data to the master control system, and the master control system controls and adjusts the working status of the burner controller (i.e., combustion time) and the two electric control valves through the dryer process data, the total material amount in the dryer, and the mineral powder moisture provided by the manufacturer. In actual applications, the moisture content of the material after drying is controlled at about 1.5% below the appropriate moisture content. The difference between the original moisture content and the initial moisture content determines the set temperature of the combustion chamber. The electric control valves on the gas main and the combustion-supporting air duct are adjusted based on the feedback from each temperature sensor. The gas main and the combustion-supporting air duct are determined based on the pressure sensors to determine whether there are any leaks or other problems.

[0044] The material distribution control system includes a multi-stage belt conveyor device, multiple pelletizing disk silo weighing devices and multiple vibration devices.

[0045] On the pelletizing chain intelligent production line, the mixed material that has been dried and mixed is sent to the pelletizing disk silo through a belt conveyor. The pelletizing disk silo is used to store the mixed material and further supply the pelletizing disk. In actual application, the actual number of pelletizing disk silos put into use is determined according to the pelletizing amount.

[0046] The multi-stage belt conveyor device is composed of multiple belt conveyor devices, the input end of the conveyor belt for material input is arranged at the discharge port of the dryer, and the conveyor belt for material output is set above the feed port of multiple pelletizing disk silos, and the dried mixed material is transported to the designated pelletizing disk silo through the unloader set at the feed port position; the controller of the multi-stage belt conveyor device is connected to the main control system, so that the main control system controls the dried material to be sent into the designated pelletizing disk silo, specifically, it is preferred to send the dried mixed material into the pelletizing disk silo that is in use and has a small amount of material.

[0047] The number of pelletizing disk mixing silo weighing devices is the same as the number of pelletizing disk mixing silos, and they are respectively arranged on the supporting part of each pelletizing disk mixing silo to collect the weight of the mixed material in the silo in real time; the weighing device of each pelletizing disk mixing silo is also connected to the main control system respectively, so that the main control system can obtain the real-time material weight of each pelletizing disk silo in real time to confirm the discharge status of the silo; the main control system replenishes materials to the pelletizing disk mixing silo that is short of material in time according to the weight of the remaining material in the mixing silo and the material demand flow of the corresponding pelletizing disk.

[0048] On the pelletizing chain intelligent production line, there is occasionally a problem of poor material discharge at the discharge end of the pelletizing disk silo (i.e., there is sufficient material in the silo, but the discharge volume is too low). Therefore, a vibrating device is also provided on the outside of each pelletizing disk silo to promote smooth material discharge by vibrating the outer wall of the silo; each vibrating device is respectively connected to the master control system, so that when the master control system detects that the material weight variable in the pelletizing disk silo in the discharge state is too low and the remaining material volume is sufficient, the vibrating device of the silo is started to promote the resumption of normal material discharge.

[0049] In summary, as a link in pellet production, the material preparation control system's raw material supply situation is closely related to the subsequent qualification rate of green pellets, so it is also an important link in the actual production process; according to actual production, effective control of this process can effectively reduce the fluctuations in pelletizing caused by material changes and unstable mixture flow.

[0050] See also Figure 3 The pelletizing control system includes a disc pelletizing control system, a screening control system and multiple third-line moisture detection devices.

[0051] The disc ball making control system includes multiple ball material belt scales, multiple water adding control systems and ball making particle size control systems.

[0052] Multiple ball material belt scales are installed one by one in the middle section of the mixture conveyor belt below the discharge end of each pelletizing disk silo to measure and weigh the materials lowered from the pelletizing disk silo, so as to quantitatively transport the pelletizing materials into the pelletizing disk; the master control system is connected with each ball material belt scale and the screw feeder of each pelletizing disk silo to obtain the planned feeding amount according to the production plan set in the master control system and the production qualification rate of the disc pelletizing machine, and then use the real-time weight on the mixture belt scale as the metering feedback to control the start and stop and speed of the screw feeder to meter the feeding of the disc pelletizing machine.

[0053] Multiple water supply control systems are installed one by one above each disc pelletizing machine to independently supply water to the corresponding disc pelletizing machine; each water supply device includes a first water supply pipeline and a second water supply pipeline arranged in parallel above the pelletizing disc, and the water inlet ends of the two are connected to the water supply main; the first water supply pipeline is provided with multiple drip nozzles, and the second water supply pipeline is provided with multiple atomizing nozzles; each water supply pipeline is provided with an electromagnetic flowmeter to measure the actual water supply of the water supply pipeline; an electric control valve is also provided at the connection between each water supply pipeline and the water supply main to control the water channel on the water supply pipeline; the main control system is respectively connected to the electric control valve on each water supply pipeline to control the opening and closing state of the electric control valve according to the water addition demand of the pelletizing material (dripping water / mist water) to realize fixed-point water addition; the main control system is also respectively connected to the electromagnetic flowmeter on each water supply pipeline to measure the water inlet on the water supply pipeline to realize quantitative water addition. As a preferred technical solution of this embodiment, a filtering device and a backwashing device are installed on the water supply main to prevent impurities in the water from contaminating and clogging the water supply pipeline during actual application.

[0054] Taking a disc pelletizing machine and its corresponding water supply device as an example, the main control system obtains the mixture flow rate supplied to the pelletizing disc based on the real-time measurement value of the mixture belt scale; thus, the optimal water addition amount of the disc pelletizing machine is calculated according to the initial moisture content of the mixture and the optimal moisture content of the raw balls, specifically the respective water supply amounts of dripping water and mist water of the disc pelletizing machine; furthermore, the main control system controls the opening time of the electric valves of the first water supply pipe and the second water supply pipe on the water addition control system according to the different water addition timings of dripping water and mist water, and controls the closing of the corresponding electric valves according to the total water supply accumulated and measured by the electromagnetic flowmeters on the first water supply pipe and the second water supply pipe, thereby realizing fixed-point and quantitative water addition to the disc pelletizing machine.

[0055] The pelletizing particle size control system includes multiple first online particle size analysis systems, multiple second online particle size analysis systems and multiple ball scooping devices;

[0056] During the pelletizing process of the disc pelletizing machine, the pellets of different particle sizes will always be distributed in a fixed area of ​​the pelletizing disc as the pelletizing disc rotates, so that the pelletizing disc can be divided into a raw material mother ball area, a growth area and a pelletizing area; according to the requirements of the pelletizing process, the raw balls that finally reach the particle size are concentrated in the pelletizing area; in addition, there will be raw balls with too large particle size in the pelletizing area. These large balls do not meet the particle size requirements and are difficult to be automatically discharged from the disc pelletizing machine with the material flow, which affects the normal pelletizing. Therefore, it is necessary to remove or crush the large balls in the pelletizing area.

[0057] Multiple first-line particle size analysis systems are installed one by one above the pelletizing disc of each disc pelletizing machine, and the installation position corresponds to the growth area in the pelletizing disc to detect the raw ball particle size distribution and particle size change trend in the growth area; each first-line particle size analysis system is also connected to the master control system, so that the operator can feedback and adjust the process parameters of the corresponding disc pelletizing machine and water addition control system according to the detection results obtained by the master control system; for example, when the pelletizing particle size does not meet the qualified rate requirements, the master control system will also reversely adjust the discharge amount of the spiral feeder controller in the discharge control system, that is, by adjusting the feeding amount of the disc pelletizing machine, the return material amount can be reduced in a short time.

[0058] Multiple second online particle size analysis systems are respectively installed above the pelletizing disc of each disc pelletizing machine, and the installation position corresponds to the pelletizing area in the pelletizing disc, so as to obtain the size distribution and quantity of large balls that do not meet the particle size requirements (for example, the diameter of the raw balls ≥ 50mm) by detecting the particle size distribution of the raw balls in the pelletizing area; each second online particle size analysis system is connected to the master control system, so that the master control system can obtain the situation of the large balls in the pelletizing area.

[0059] In this embodiment, the first and second online particle size analysis systems are identical, specifically comprising two symmetrically mounted image acquisition devices and image processing systems. The image acquisition devices utilize cameras equipped with dust-proof purge covers. The two image acquisition devices simultaneously capture clear images of the ball formation state of the ball disc's ball formation zone at predetermined intervals, allowing the two images to be combined to form a complete ball formation image of the entire ball disc's ball formation zone. As a preferred technical solution for this embodiment, the online particle size analysis system also includes a fill light and a defogger fan, positioned adjacent to the two image acquisition devices to ensure clear image capture. The image processing system is connected to the two image acquisition devices to analyze the continuously captured ball formation images and determine the ball size distribution and trend. The online particle size analysis system can be implemented using the video raw ball size analyzer and its accompanying raw ball size state detection method provided in the previously published patent CN 107063946A.

[0060] A plurality of ball scooping devices are respectively arranged on one side of the ball forming area of ​​each disc ball making machine and connected to a robotic arm. The robotic arm drives the ball scooping device to move into the ball forming area of ​​the disc ball making machine or to remove the ball forming area from the disc ball making machine, so as to regularly scoop out large balls in the ball forming area of ​​the disc ball making machine and further crush them. The robotic arm is connected to the master control system, so that when the size and number of large balls in the ball forming area exceed a set upper limit threshold, the master control system activates the robotic arm to move the ball scooping device into the ball forming area of ​​the disc ball making machine. After completing an operation cycle, the master control system activates the robotic arm to remove the ball scooping device from the disc ball making machine. In this embodiment, the ball scooping device can specifically adopt the large ball scooping device of the disc ball making machine provided by the disclosed patent CN114150149A or the automatic ball scooping device of the disc ball making machine provided by the disclosed patent CN214361597U.

[0061] The screening control system includes multiple roller screening devices.

[0062] Multiple roller screening devices are respectively arranged at the discharge ports of the pelletizing discs in a one-to-one correspondence, and are arranged above the raw ball conveyor belt along the raw ball conveying direction, so that the raw balls sent out from the discharge ports of each pelletizing disc first fall onto the roller screening device; the roller screening device is provided with a small ball screening section, a qualified ball screening section and a large ball screening section in sequence along the raw ball conveying direction; wherein, the distance between adjacent screen rollers in the small ball screening section is set to be less than the lower limit of the qualified raw ball particle size of 8mm, and a small ball collection hopper is provided below the small ball screening section, so that the small-sized raw balls in the raw balls will fall into the small ball collection hopper from the gap between adjacent screen rollers when they are conveyed to the small ball screening section. ; The distance between adjacent roller screens in the qualified ball screening section is set between 8mm and 16mm, so that the raw balls with particle size meeting the requirements will fall from the gap between adjacent screen rollers to the raw ball conveyor belt when they are transported to the qualified ball screening section, and continue to be transported; the distance between adjacent screen rollers in the large ball screening section is set to be greater than the upper limit of qualified raw ball particle size of 16mm, and a large ball collection hopper is set under the large ball screening section, so that the large-size raw balls in the raw balls will fall from the gap between adjacent screen rollers to the large ball collection hopper when they are transported to the large ball screening section. The values ​​of the upper limit of qualified raw ball particle size and the lower limit of qualified raw ball particle size can be adjusted according to the sintering process.

[0063] As a preferred technical solution of this embodiment, a large ball crushing device is provided below the large ball screening section of each roller screening device; wherein, see Figure 5The large ball crushing device is arranged at the tail end of the large ball screening section and can be located above the large ball collecting hopper 3; the large ball crushing device is composed of two crushing rollers 2 arranged in parallel along the setting direction of the screen rollers, and the two are driven by the driving motor to rotate synchronously in opposite directions to crush all kinds of ball materials (including ball materials that do not have time to fall from the aforementioned three screening sections, and oversized balls) that roll to the tail end of the large ball screen, and then fall into the large ball collecting hopper 3; and the small-size balls falling from the small ball screening section fall into the small ball collecting hopper 5, and the balls collected by the large ball collecting hopper 3 and the small ball collecting hopper 5 fall onto the return conveyor belt 6 arranged below the two, and the qualified balls falling from the qualified ball screening section fall directly onto the raw ball conveyor belt 4; the driving motor in the large ball crushing device is connected to the main control system so that it can be automatically started by the main control system when the disc ball making machine is discharging.

[0064] As a preferred technical solution of this embodiment, the multi-stage belt conveyor device also includes a return conveyor belt arranged below the small ball collection hopper and the large ball collection hopper, one end of which is arranged below the discharge port of the small ball collection hopper and the large ball collection hopper, and the other end is located above any mixed material conveyor belt, so that small balls with non-compliant particle sizes are returned to the mixed material conveyor belt and reused in the disc ball making machine for ball making; it should be noted that the falling strength of the raw balls is relatively weak, so the balls will be broken into small particle size materials during the return process, which will not affect the re-ball making.

[0065] As another preferred technical solution of this embodiment, the pelletizing control system further includes a block for displaying the particle size distribution data of the pellets in each pelletizing disk.

[0066] Multiple third online moisture detection devices are respectively arranged on the adjacent sides of the raw ball conveyor belt, and a robot is also arranged on the adjacent side of each third online moisture detection device to randomly grab qualified balls that fall from the roller screening device to the raw ball conveyor belt and put them into the third online moisture detection device for moisture detection; in this embodiment, online moisture analysis and detection is realized by using the raw ball online moisture analysis and detection device provided by the disclosed patent CN221038059U.

[0067] See also Figure 4 The roasting control system includes a chain grate control system, a rotary kiln control system, a receiving hopper control system and an annular cooler control system.

[0068] On the pellet chain intelligent production line, the chain grate is set at the output end of the green ball conveyor belt, which is used to further dry and preheat the green balls that have passed the screening process. In this process, the material thickness and machine speed of the chain grate are the prerequisites for stable production.

[0069] The chain grate control system includes a green ball material thickness detection control system and a third online particle size analysis system.

[0070] The green ball material thickness detection system is set on the feeding end side of the chain grate machine, which includes multiple image acquisition devices, a laser emitter capable of emitting at least one straight laser beam, and an image processing device; multiple image acquisition devices are arranged in a row above the grate bed, and the lenses are all tilted downward at the same angle, so that the images collected by the multiple image acquisition devices can constitute a full picture of the green ball material above the grate bed; the laser emitter is arranged above the grate bed in a way that the laser light source emission port is vertically downward, so that the straight laser it emits is perpendicular to the grate bed. The green ball material is irradiated in the direction of running; the image processing device processes and analyzes the image obtained by the image acquisition device to obtain the green ball distribution status; the general control system is connected with the green ball material thickness detection system and the chain grate speed regulator and the chain grate distributor to adjust the speed of the chain grate and the speed of the distributor to ensure that the material thickness on the chain grate remains stable; in this embodiment, the green ball material thickness detection system can adopt the green ball distribution intelligent control system of the disclosed patent CN109355493A and its supporting control method.

[0071] The third online particle size analysis system is arranged on the feeding end side of the chain grate, and is used to detect the particle size distribution of the raw ball material that is about to enter the chain grate; in this embodiment, the third online particle size analysis system is the same as the online particle size analysis system in the aforementioned pelletizing particle size control system, and is also implemented using the video raw ball particle size analyzer and its supporting raw ball particle size status detection method provided by the disclosed patent CN107063946A; the third online particle size analysis system is connected to the main control system, so that the main control system obtains the particle size distribution of the current raw ball material to estimate the permeability and volume ratio of the material layer, and then obtains the actual weight of the raw balls entering the rotary kiln later.

[0072] As a preferred technical solution of this embodiment, the chain grate control system also includes an equipment usage status monitoring system, which includes multiple thermal imaging temperature monitors, multiple pellet chain grate grate plate status monitoring systems and multiple pellet chain grate grate bar status monitoring systems; wherein, multiple thermal imaging temperature monitors are respectively and one by one set in the chain grate to monitor the temperature in the chain grate in real time; each thermal imaging temperature monitor is connected to the master control system, so that the master control system can obtain the real-time temperature of each chain grate in real time, so as to promptly detect when the temperature is higher than the set threshold; multiple pellet chain grate grates The plate status monitoring system is respectively set up above the grate bed in each chain grate machine, and it collects and processes the grate plate image through the thermal imager to determine whether the grate plate status is normal; multiple pellet chain grate machine grate bar status monitoring systems are respectively set up at the tail of each chain grate machine, and it collects and processes the grate bar image through the camera to determine whether the grate bar status is normal; each pellet chain grate machine grate plate status monitoring system and each pellet chain grate machine grate bar status monitoring system are respectively connected to the master control system, so that the master control system can obtain in real time whether the current status of the grate plate and grate bar in the chain grate machine is normal. In this embodiment, the pellet chain grate plate status monitoring system can adopt the pellet chain grate plate status monitoring system and its supporting monitoring method provided by the published patent CN113469974A; the pellet chain grate bar status monitoring system can adopt the pellet chain grate bar status monitoring system and its supporting monitoring method provided by the published patent CN113570551A.

[0073] The feeding end of the rotary kiln is sealed and connected to the discharging end of the chain grate, so that the raw pellets dried and preheated by the chain grate can directly enter the rotary kiln for the next roasting process.

[0074] The rotary kiln control system includes a kiln lining temperature monitoring system, which is arranged on the adjacent side of the rotary kiln to monitor the temperature of each area divided on the kiln lining of the rotary kiln in real time; the kiln temperature monitoring system is connected to the main control system, so that the main control system can obtain the temperature status of the rotary kiln lining in real time, and promptly detect abnormal phenomena such as overheating and excessive heating rate in local kiln lining; in this embodiment, the kiln lining temperature monitoring system is specifically a thermal imager and a processor arranged on the outside of the rotary kiln. During the rotation of the rotary kiln, the thermal imager continuously collects thermal images of the kiln lining and sends them to the processor for processing to determine whether there is an overtemperature in the thermal image. At the same time, since a mark plate is set along the circumference of the outside of the kiln lining of the rotary kiln, the current thermal image of the kiln lining in the same area can be compared with the previous thermal image to determine whether the same image collection area has a too rapid heating rate, which is conducive to quickly locating the temperature anomaly.

[0075] The feeding end of the receiving hopper is sealed and connected with the discharging end of the rotary kiln, so that the pellets calcined in the rotary kiln are first stored in the receiving hopper and then sent to the ring cooler.

[0076] The receiving hopper control system includes a material level detection system, which is arranged above the receiving hopper to monitor the ball material level in the receiving hopper. Each material level detection system is connected to the main control system respectively, so that the main control system can feed the material to the ring cooler when there is ball material in the receiving hopper.

[0077] The ring cooling control system includes four thermal imaging temperature monitoring devices installed in each ring cooling machine. The four devices are respectively installed in the four ring cooling sections of the ring cooling machine to monitor the temperature of each ring cooling section in real time. Each thermal imaging temperature monitoring device is connected to the master control system so that the master control system can intervene in time when it detects abnormal temperature in any ring cooling section on any ring cooling machine.

[0078] The finished ball conveying control system includes an online compression resistance testing device for finished balls arranged on the finished ball conveyor belt; a robot is also arranged adjacent to the online compression resistance testing device for finished balls, so that the robot can randomly grab the finished balls on each finished ball conveyor belt and put them into the online compression resistance testing device for finished balls for compression resistance testing; in this embodiment, the online compression resistance testing device for finished balls is implemented by the online compression resistance testing device for finished balls provided by the disclosed patent CN117288583A, or the online compression resistance testing device for finished balls provided by the disclosed patent CN221260648U.

[0079] In this embodiment, the master control system specifically adopts a server with a display, which is connected to the devices or equipment that need to exchange data signals in the batching system, pelletizing system, roasting system, and finished ball conveying system through optical fibers, so as to continuously collect data signals and feedback control signals to the devices or equipment, so as to realize continuous feedback adjustment of the production conditions of each system process according to the ball material forming process during the entire pellet production process.

Claims

1. A pellet chain intelligent production line control system, characterized in that: It includes a material preparation control system, a pelletizing control system, a roasting control system and a finished ball conveying control system set up at the production site, and a master control system set up in the central control room; wherein, the material preparation control system includes a batching control system for realizing the proportional configuration of different types of raw materials, a drying control system for drying the mixed raw materials to a specified moisture content, and a material distribution control system for storing and directionally conveying the dried pellet mixture; the pelletizing control system includes a disc pelletizing control system for controlling the particle size of raw balls, and a screening control system for screening the particle size of raw balls produced by the disc pelletizing machine; the roasting control system includes a chain grate control system for controlling the thickness of the ball material, a rotary kiln control system for monitoring the temperature status of the rotary kiln lining, a receiving hopper control system for monitoring the material level of the receiving hopper, and a ring cooler control system for monitoring the temperature status of the four ring cooling sections of the ring cooler; the finished ball conveying control system includes an online compression resistance detection device for finished balls set on the finished ball conveyor belt; the master control system is respectively connected to the material preparation control system, the pelletizing control system, the roasting control system and the finished ball conveying control system.

2. The pellet chain intelligent production line control system according to claim 1 is characterized in that: In the material preparation control system, The batching control system includes: multiple raw material silo weighing devices, which are respectively installed in a one-to-one correspondence with each raw material silo support portion to collect the weight of the material in the silo in real time. Each raw material silo weighing device is also connected to the master control system, which enables the master control system to monitor the discharge status and remaining material weight of each raw material silo in real time; multiple batching belt scales, which are respectively installed in a one-to-one correspondence with the middle section of the conveyor belt located below the discharge end of each raw material silo to measure and weigh the material discharged from the raw material silo onto the conveyor belt. The master control system is connected to each batching belt scale and the screw feeder of each raw material silo to control the start, stop and speed of the screw feeder according to the cumulative weight of the material on the batching belt scale; The drying control system includes: a first online moisture detection device and a second online moisture detection device, which are respectively installed at the feed and discharge ends of the dryer to monitor the original moisture content and initial moisture content of each conveyed batch of materials in real time. The two online moisture detection devices are also connected to the master control system, allowing the master control system to obtain the moisture content of each conveyed batch of materials before and after drying in real time; a dryer process data acquisition system, which is connected to the master control system, allowing the master control system to adjust the dryer process data based on the monitoring results of the two online moisture detection devices and the current process data of the dryer; The material distribution control system includes: a multi-stage belt conveyor device, wherein the input end of the conveyor belt for material input is arranged at the discharge port of the dryer, and the conveyor belt for material output is arranged above the feed port of multiple pelletizing disk silos, and the dried mixed material is conveyed to the designated pelletizing disk silo through the unloader arranged at intervals above the conveyor belt; the controller of the multi-stage belt conveyor device is connected to the main control system, so that the main control system controls the dried material to be fed into the designated pelletizing disk silo; multiple pelletizing disk silo weighing devices are respectively arranged on the support part of each pelletizing disk mixed silo to collect the weight of the mixed material in the silo in real time; each pelletizing disk mixed silo weighing device is also respectively connected to the main control system, so that the main control system monitors the discharge status and residual material weight of each pelletizing disk mixed silo in real time.

3. The pellet chain intelligent production line control system according to claim 2 is characterized in that: A vibrating device is provided on the outer wall of each raw material bin and pelletizing disk mixing bin, and each vibrating device is connected to the master control system respectively, so that the master control system can start the corresponding vibrating device when it detects that the material bin is not unloaded smoothly.

4. The pellet chain intelligent production line control system according to claim 2, characterized in that: The dryer process data acquisition system includes: a first temperature sensor, which is arranged in the smoke hood of the dryer to collect the smoke hood temperature in real time; a second temperature sensor, which is arranged in the combustion chamber where the burner is located to collect the temperature of the combustion chamber; a third temperature sensor, which is arranged at the dust collector inlet of the dryer to collect the flue gas temperature at the dust collector inlet in real time; a first pressure sensor, which is arranged on the combustion-supporting air duct of the dryer to collect the gas pressure in the combustion-supporting air duct in real time; a second pressure sensor, which is arranged on the gas main of the dryer to collect the gas pressure in the gas main in real time; a first flow sensor, which is arranged on the combustion-supporting air duct of the dryer to collect the gas pressure in the combustion-supporting air duct in real time flow; a second flow sensor, which is arranged on the gas main of the dryer to collect the gas flow in the gas main in real time; a flame detector, the detection object is the burner, to monitor the flame combustion condition in the burner in real time; a first electric-controlled valve, which is installed on the gas main to control the gas flow in the gas main; a second electric-controlled valve, which is installed on the combustion-supporting air duct to control the flow of the combustion-supporting gas in the combustion-supporting air duct; each temperature sensor, each pressure sensor, each flame intensity heat flow sensor, each flow sensor, burner controller and each electric-controlled valve are respectively connected to the master control system, so that the master control system adjusts the working status of the burner controller and the two electric-controlled valves according to the monitoring information of the sensor.

5. The pellet chain intelligent production line control system according to claim 1 is characterized in that: In the ball making control system, The disc pelletizing control system includes: multiple mixed material belt scales, which are respectively installed one by one in the middle section of the ball material conveyor belt below the discharge end of each pelletizing disc silo to measure and weigh the materials lowered from the pelletizing disc mixed material silo. The master control system is connected with each mixed material belt scale and the screw feeder of each pelletizing disc silo to control the start and stop and speed of the screw feeder according to the cumulative weight of the material on the mixed material belt scale; the pelletizing particle size control system includes multiple first online particle size analysis systems, multiple second online particle size analysis systems and multiple ball scooping devices; the multiple first online particle size analysis systems are respectively arranged one by one above the pelletizing disc and correspond to the large growth area in the pelletizing disc; each first The online particle size analysis system is connected to the master control system to feedback and adjust the process parameters of the corresponding disc pelletizing machine and water addition control system based on the detected raw ball particle size distribution and particle size change trend; multiple second online particle size analysis systems are respectively arranged one by one above the pelletizing disc and corresponding to the pelletizing area in the pelletizing disc. Each second online particle size analysis system is connected to the master control system so that the master control system can obtain the size distribution and quantity of large balls in the pelletizing area; multiple ball scooping devices are respectively arranged one by one on one side of the pelletizing area of ​​the pelletizing disc of each disc pelletizing machine through a mechanical arm. Each mechanical arm is connected to the master control system to start and stop the ball scooping device according to the presence of large balls in the pelletizing area and to clean the large balls; The screening control system includes: multiple roller screening devices, which are respectively arranged at the discharge port of the pelletizing disc; each roller screening device is provided with a small ball screening section, a qualified ball screening section and a large ball screening section in sequence along the raw ball conveying direction, and each screening section is controlled to control the small balls, qualified balls and large balls in the raw balls to fall in sequence in different screening sections by setting the distance between adjacent screening rollers; a collecting hopper is provided below the small ball screening section and the large ball screening section, and a raw ball conveyor belt is provided below the qualified ball screening section; the third online moisture detection device is arranged on the adjacent side of the raw ball conveyor belt, and a manipulator is also provided on the adjacent side of the third online moisture detection device, so that the raw balls on the raw ball conveyor belt can be randomly grabbed by the manipulator and put into the third online moisture detection device for moisture detection.

6. The pellet chain intelligent production line control system according to claim 5, characterized in that: The disc pelletizing control system also includes multiple water addition control systems, which are installed one by one above each disc pelletizing machine; each water supply device includes a first water supply pipeline and a second water supply pipeline arranged in parallel above the pelletizing disc, and the water inlet ends of the two are connected to the water supply main; the first water supply pipeline is provided with multiple drip nozzles, and the second water supply pipeline is provided with multiple atomizing nozzles; each water supply pipeline is provided with an electromagnetic flowmeter to measure the actual water supply volume of the water supply pipeline; an electric control valve is also provided at the connection between each water supply pipeline and the water supply main to control the water supply on the water supply pipeline; the main control system is connected to the electric control valve and electromagnetic flowmeter on each water supply pipeline respectively to control the opening and closing state of the electric control valve according to the drip water demand and mist water demand of the pelletizing material, so as to realize fixed-point and quantitative water addition.

7. The pellet chain intelligent production line control system according to claim 5, characterized in that: Each roller screening device also includes a large ball crushing device, which is arranged at the tail end of the large ball screening section and can be located above the large ball collection hopper; the large ball crushing device is composed of two crushing rollers that rotate in opposite directions through a drive motor to crush various types of ball materials that roll to the tail end of the large ball screen; the drive motor in the large ball crushing device is connected to the main control system to be automatically started by the main control system when the disc pelletizing machine is discharging; the multi-stage belt conveyor device also includes a return conveyor belt arranged below the small ball collection hopper and the large ball collection hopper, one end of which is arranged below the discharge port of the small ball collection hopper and the large ball collection hopper, and the other end is located above any mixed material conveyor belt, and the mixed material conveyor belt is arranged below the discharge port of the pelletizing disc silo and between the corresponding disc pelletizing machine silo.

8. The pellet chain intelligent production line control system according to claim 1, characterized in that: In the roasting control system, The chain grate control system includes: a green ball material thickness detection system, which is arranged on the feeding side of the chain grate to obtain the green ball distribution status; a master control system connected to the green ball material thickness detection system and the chain grate speed regulator to adjust the chain grate speed according to the current green ball distribution status; a third online particle size analysis system, which is arranged on the feeding side of the chain grate to obtain the green ball distribution particle size distribution; the third online particle size analysis system is connected to the master control system, so that the master control system calculates the preheating temperature of the chain grate based on the current green ball distribution particle size distribution; The rotary kiln control system includes a kiln lining temperature monitoring system, which is installed adjacent to the rotary kiln to monitor the temperature of each area on the circumferential kiln lining in real time. The kiln temperature monitoring system is connected to the main control system, so that when the main control system detects abnormal temperature, it can quickly locate the abnormal kiln lining position and corresponding temperature. The receiving hopper control system includes: a material level detection system, which is installed above the receiving hopper to monitor the ball material level in the receiving hopper. The material level detection system is connected to the main control system, so that the main control system can feed the ball material to the ring cooler when there is ball material in the receiving hopper; The ring cooling control system includes four thermal imaging temperature monitoring devices installed in each ring cooling machine. The four devices are respectively installed in the four ring cooling sections of the ring cooling machine to monitor the temperature of each ring cooling section in real time. Each thermal imaging temperature monitoring device is connected to the master control system so that the master control system can intervene in time when it detects abnormal temperature in any ring cooling section on any ring cooling machine.

9. The pellet chain intelligent production line control system according to claim 8, characterized in that: The chain grate control system also includes an equipment usage status monitoring system, which includes a thermal imaging temperature monitor installed in each chain grate, a pellet chain grate plate status monitoring system and a pellet chain grate bar status monitoring system. The three are connected to the master control system respectively, so that the master control system can handle the abnormal status in time when it detects it.

10. The pellet chain intelligent production line control system according to claim 1, characterized in that: A robot is also provided next to each finished ball online compression testing device, so that the finished balls on each finished ball conveyor belt can be randomly grabbed by the robot and put into the finished ball online compression testing device for compression performance testing.

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