Recycling control method and system for waste heat in cold area of tunnel kiln

Abstract

The invention provides a method and a system for controlling recycling of waste heat in a tunnel kiln cooling area, which are used for identifying the heat dissipation state characteristics of a kiln car in the tunnel kiln cooling area so as to adjust the blast operation of the cooling area; detecting particle state characteristics and airflow pressure intensity state characteristics of the flue gas flow output by the cooling area so as to filter and recycle the flue gas flow, and storing the recycled hot air flow in a hot air buffer pool; identifying temperature change data of articles loaded on the kiln car in the preheating area of the tunnel kiln so as to determine preheating heat gap state information of the articles loaded on the kiln car in the preheating area; based on the real-time recovery hot gas state information of the hot gas buffer pool, whether the hot gas buffer pool can conduct hot gas supplement operation on the preheating area or not is judged, and based on the preheating heat notch state information, the hot gas shunting output operation conducted by the hot gas buffer pool to the preheating area is adjusted, so that cyclic utilization of waste heat of the cooling area to the preheating area is achieved; the overall thermal cycle efficiency of the tunnel kiln is improved; and the operation cost of the tunnel kiln is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of heat energy recovery and utilization, and in particular to a control method and system for recycling waste heat removed from a cooling zone of a tunnel kiln. Background Art

[0002] Tunnel kiln is a device that realizes the continuous batch firing production of ceramic products. According to the firing process of ceramic products, the tunnel kiln includes a preheating zone, a high temperature zone, and a cooling zone in sequence; among them, the preheating zone is used to preheat the ceramic body so that the ceramic body can be evenly heated to a suitable temperature to avoid the ceramic body from being rapidly heated and cracked after entering the high temperature zone; the high temperature zone is used to high-temperature fire the ceramic body; the cooling zone is used to cool down the fired ceramic products. The above three areas of the tunnel kiln can operate synchronously, and the kiln car loads ceramic items and transports them inside the tunnel kiln, so that at the same time, the preheating zone, high temperature zone, and cooling zone can accommodate different kiln cars to preheat, high-temperature fire, and cool the ceramic products loaded thereon. The fired ceramic products will release a lot of heat in the cooling zone, and this heat is usually pumped out to the external environment, which not only causes flue gas particle pollution to the external environment, but also causes heat energy waste, increasing the operating heat energy cost of the tunnel kiln. It can be seen that how to recover and recycle the heat dissipated in the cooling zone of the tunnel kiln is of great significance to improving the overall thermal cycle efficiency of the tunnel kiln and reducing the operating costs of the tunnel kiln. Summary of the invention

[0003] In view of the defects of the prior art, the present invention provides a control method and system for recycling waste heat from a cooling zone of a tunnel kiln, which identifies the heat dissipation state characteristics of a kiln car in the cooling zone of the tunnel kiln, thereby adjusting the blast operation of the cooling zone; detects the particle state characteristics and airflow pressure state characteristics of the flue gas flow output from the cooling zone, thereby filtering and recycling the flue gas flow, and storing the recycled hot air flow in a hot gas buffer pool; identifies the temperature change data of the articles loaded in the kiln car in the preheating zone of the tunnel kiln, thereby determining the preheating heat gap state information of the articles loaded in the kiln car in the preheating zone; based on the real-time hot gas recovery state information of the hot gas buffer pool, determines whether the hot gas buffer pool can perform hot gas supplement operation for the preheating zone, and based on the preheating heat gap state information, adjusts the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone, accurately and centrally collects the heat dissipated in the cooling zone, ensures that an effective and stable supplementary heat source is formed in the hot gas buffer pool, thereby implementing hot gas diversion output to the preheating zone, realizing the recycling of waste heat from the cooling zone to the preheating zone, improving the overall thermal cycle efficiency of the tunnel kiln and reducing the operating cost of the tunnel kiln.

[0004] The present invention provides a control method for recycling waste heat removed from a cooling zone of a tunnel kiln, comprising the following steps:

[0005] Step S1, identifying a kiln car in a cooling zone of a tunnel kiln, obtaining heat dissipation state characteristics of the kiln car in the cooling zone; and adjusting the blasting operation of the cooling zone based on the heat dissipation state characteristics;

[0006] Step S2, detecting the flue gas flow output after the cooling zone is blown, determining the particle state characteristics and the airflow pressure state characteristics of the flue gas flow; filtering and recycling the flue gas flow based on the particle state characteristics and the airflow pressure state characteristics, so as to store the recycled hot gas flow in a hot gas buffer pool;

[0007] Step S3, identifying the kiln car in the preheating zone of the tunnel kiln, obtaining temperature change data of the objects loaded in the kiln car in the preheating zone; determining the preheating heat gap state information of the objects loaded in the kiln car in the preheating zone based on the temperature change data;

[0008] Step S4, based on the real-time hot gas recovery status information of the hot gas buffer pool, determine whether the hot gas buffer pool can perform hot gas replenishment operation for the preheating zone; based on the preheating heat gap status information, adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone.

[0009] In one embodiment disclosed in the present application, in the step S1, a kiln car in a cooling zone of a tunnel kiln is identified to obtain heat dissipation state characteristics of the kiln car in the cooling zone; and based on the heat dissipation state characteristics, an air blowing operation of the cooling zone is adjusted, including:

[0010] Dynamic thermal imaging is performed on the internal space of the tunnel kiln cooling zone to obtain a dynamic thermal infrared image; the dynamic thermal infrared image is identified to obtain the heat dissipation state characteristics of the kiln car in the cooling zone; wherein the heat dissipation state characteristics include the heat dissipation rate and heat dissipation direction of the kiln car in the entire range;

[0011] Based on the heat dissipation state characteristics, the heat flow movement state characteristics of the internal space of the cooling zone are estimated; wherein, the heat flow movement state characteristics include the flow rate and direction of the hot air flow movement formed by the heat flow movement in the internal space of the cooling zone under a natural state; based on the heat flow movement state characteristics, the blowing operation parameters of the internal space of the cooling zone are adjusted so that the hot air flow in the internal space of the cooling zone moves at a uniform speed along a preset direction; wherein, the blowing operation parameters include the blowing operation direction and / or the blowing airflow velocity.

[0012] In one embodiment disclosed in the present application, in the step S2, the flue gas flow output after the cooling zone is blown is detected to determine the particle state characteristics and the airflow pressure state characteristics of the flue gas flow; based on the particle state characteristics and the airflow pressure state characteristics, the flue gas flow is filtered and recycled, so that the recycled hot gas flow is stored in a hot gas buffer pool, including:

[0013] Detect and identify the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and airflow pressure state characteristics inside the flue gas flow; wherein the particle state characteristics include the time domain variation characteristics of the particle concentration and the average particle movement speed inside the flue gas flow; the airflow pressure state characteristics include the time domain variation characteristics of the air pressure of the flue gas flow during movement;

[0014] Based on the particle state characteristics, the electrostatic adsorption parameters for particle filtration treatment of the flue gas flow are adjusted, and based on the airflow pressure state characteristics, the negative pressure adsorption parameters for recovery treatment of the flue gas flow are adjusted, so that the recovered hot air flow is stored in a hot gas buffer pool.

[0015] In one embodiment disclosed in the present application, in the step S3, a kiln car in the preheating zone of the tunnel kiln is identified to obtain temperature change data of the objects loaded in the kiln car in the preheating zone; based on the temperature change data, preheating heat gap state information of the objects loaded in the kiln car in the preheating zone is determined, including:

[0016] Perform dynamic thermal imaging on the internal space of the tunnel kiln preheating zone to obtain a dynamic thermal infrared image; perform recognition on the dynamic thermal infrared image to obtain temperature change data of all items loaded on the kiln car in the preheating zone;

[0017] Based on the temperature change data, the temperature increase rate of all the items loaded on the kiln car in the preheating zone is determined; based on the temperature increase rate, the preheating heat value required for all the items to be heated to the target temperature is predicted, which is used as the preheating heat gap status information of the items loaded on the kiln car in the preheating zone.

[0018] In one embodiment disclosed in the present application, in the step S4, based on the real-time hot gas recovery state information of the hot gas buffer pool, it is judged whether the hot gas buffer pool can perform hot gas supplement operation for the preheating zone; based on the preheating heat gap state information, the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone is adjusted, including:

[0019] Based on the real-time recovered hot gas temperature and hot gas pressure of the hot gas buffer pool, predict the minimum received heat value per unit time of the preheating zone after the hot gas buffer pool delivers hot gas to the preheating zone; based on the minimum received heat value, determine whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone;

[0020] When the hot gas buffer pool is able to perform hot gas replenishment operations on the preheating zone, the hot gas supply flow required for all sub-areas within the preheating zone is determined based on the preheating heat value required to raise the temperature of all items loaded on the kiln car in the preheating zone to the target temperature contained in the preheating heat gap status information; based on the hot gas supply flow, the diversion output gas pressure of the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone is adjusted.

[0021] The present invention also provides a control system for recycling waste heat from a cooling zone of a tunnel kiln, comprising:

[0022] A cooling zone identification module is used to identify the kiln car in the cooling zone of the tunnel kiln and obtain the heat dissipation state characteristics of the kiln car in the cooling zone;

[0023] An air blowing operation adjustment module, used for adjusting the air blowing operation of the cooling zone based on the heat dissipation state characteristics;

[0024] A flue gas flow detection module, used to detect the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and air flow pressure state characteristics of the flue gas flow;

[0025] A flue gas flow processing control module, configured to filter and recycle the flue gas flow based on the particle state characteristics and the gas flow pressure state characteristics, so as to store the recycle hot gas flow in a hot gas buffer pool;

[0026] A preheating zone identification module, used to identify the kiln car in the preheating zone of the tunnel kiln, and obtain temperature change data of the objects loaded in the kiln car in the preheating zone;

[0027] A preheating heat gap determination module, used to determine the preheating heat gap state information of the articles loaded on the kiln car in the preheating zone based on the temperature change data;

[0028] A hot gas buffer pool state judgment module, used to judge whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone based on the real-time hot gas recovery state information of the hot gas buffer pool;

[0029] A hot gas diversion adjustment module is used to adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating area based on the preheating heat gap state information.

[0030] In one embodiment disclosed in the present application, the cooling zone identification module is used to identify the kiln car in the cooling zone of the tunnel kiln, and obtain the heat dissipation state characteristics of the kiln car in the cooling zone, including:

[0031] Dynamic thermal imaging is performed on the internal space of the tunnel kiln cooling zone to obtain a dynamic thermal infrared image; the dynamic thermal infrared image is identified to obtain the heat dissipation state characteristics of the kiln car in the cooling zone; wherein the heat dissipation state characteristics include the heat dissipation rate and heat dissipation direction of the kiln car in the entire range;

[0032] The air blowing operation adjustment module is used to adjust the air blowing operation of the cooling zone based on the heat dissipation state characteristics, including:

[0033] Based on the heat dissipation state characteristics, the heat flow movement state characteristics of the internal space of the cooling zone are estimated; wherein, the heat flow movement state characteristics include the flow rate and direction of the hot air flow movement formed by the heat flow movement in the internal space of the cooling zone under a natural state; based on the heat flow movement state characteristics, the blowing operation parameters of the internal space of the cooling zone are adjusted so that the hot air flow in the internal space of the cooling zone moves at a uniform speed along a preset direction; wherein, the blowing operation parameters include the blowing operation direction and / or the blowing airflow velocity.

[0034] In one embodiment disclosed in the present application, the flue gas flow detection module is used to detect the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and airflow pressure state characteristics of the flue gas flow, including:

[0035] Detect and identify the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and airflow pressure state characteristics inside the flue gas flow; wherein the particle state characteristics include the time domain variation characteristics of the particle concentration and the average particle movement speed inside the flue gas flow; the airflow pressure state characteristics include the time domain variation characteristics of the air pressure of the flue gas flow during movement;

[0036] The flue gas flow processing control module is used to filter and recycle the flue gas flow based on the particle state characteristics and the gas flow pressure state characteristics, so as to store the recovered hot gas flow in a hot gas buffer pool, including:

[0037] Based on the particle state characteristics, the electrostatic adsorption parameters for particle filtration treatment of the flue gas flow are adjusted, and based on the airflow pressure state characteristics, the negative pressure adsorption parameters for recovery treatment of the flue gas flow are adjusted, so that the recovered hot air flow is stored in a hot gas buffer pool.

[0038] In one embodiment disclosed in the present application, the preheating zone identification module is used to identify the kiln car in the preheating zone of the tunnel kiln, and obtain the temperature change data of the objects loaded in the kiln car in the preheating zone, including:

[0039] Perform dynamic thermal imaging on the internal space of the tunnel kiln preheating zone to obtain a dynamic thermal infrared image; perform recognition on the dynamic thermal infrared image to obtain temperature change data of all items loaded on the kiln car in the preheating zone;

[0040] The preheating heat gap determination module is used to determine the preheating heat gap state information of the articles loaded on the kiln car in the preheating zone based on the temperature change data, including:

[0041] Based on the temperature change data, the temperature increase rate of all the items loaded on the kiln car in the preheating zone is determined; based on the temperature increase rate, the preheating heat value required for all the items to be heated to the target temperature is predicted, which is used as the preheating heat gap status information of the items loaded on the kiln car in the preheating zone.

[0042] In one embodiment disclosed in the present application, the hot gas buffer pool state judgment module is used to judge whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone based on the real-time hot gas recovery state information of the hot gas buffer pool, including:

[0043] Based on the real-time recovered hot gas temperature and hot gas pressure of the hot gas buffer pool, predict the minimum received heat value per unit time of the preheating zone after the hot gas buffer pool delivers hot gas to the preheating zone; based on the minimum received heat value, determine whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone;

[0044] The hot gas diversion adjustment module is used to adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating area based on the preheating heat gap state information, including:

[0045] When the hot gas buffer pool is able to perform hot gas replenishment operations on the preheating zone, the hot gas supply flow required for all sub-areas within the preheating zone is determined based on the preheating heat value required to raise the temperature of all items loaded on the kiln car in the preheating zone to the target temperature contained in the preheating heat gap status information; based on the hot gas supply flow, the diversion output gas pressure of the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone is adjusted.

[0046] Compared with the prior art, the waste heat recycling control method and system of the tunnel kiln cooling zone identify the heat dissipation state characteristics of the kiln car in the tunnel kiln cooling zone, thereby adjusting the blast operation of the cooling zone; detect the particle state characteristics and airflow pressure state characteristics of the flue gas flow output from the cooling zone, thereby filtering and recycling the flue gas flow, and storing the recycled hot air flow in the hot gas buffer pool; identify the temperature change data of the objects loaded in the kiln car in the preheating zone of the tunnel kiln, thereby determining the preheating heat gap state information of the objects loaded in the kiln car in the preheating zone; based on the real-time hot gas recovery state information of the hot gas buffer pool, determine whether the hot gas buffer pool can perform hot gas supplement operation for the preheating zone, and based on the preheating heat gap state information, adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone, accurately and centrally collect the heat dissipated in the cooling zone, ensure the formation of an effective and stable supplementary heat source in the hot gas buffer pool, thereby implementing hot gas diversion output to the preheating zone, realizing the recycling of waste heat from the cooling zone to the preheating zone, improving the overall thermal cycle efficiency of the tunnel kiln and reducing the operating cost of the tunnel kiln.

[0047] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0048] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 A schematic flow chart of a control method for recycling waste heat removed from a cooling zone of a tunnel kiln provided by the present invention.

[0051] Figure 2 A schematic diagram of the framework of a control system for recycling waste heat removed from a cooling zone of a tunnel kiln provided by the present invention. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] See also Figure 1 , is a flow chart of a method for controlling the reuse of waste heat removed from a cooling zone of a tunnel kiln provided in an embodiment of the present invention. The method for controlling the reuse of waste heat removed from a cooling zone of a tunnel kiln comprises:

[0054] Step S1, identifying the kiln car in the cooling zone of the tunnel kiln, obtaining the heat dissipation state characteristics of the kiln car in the cooling zone; adjusting the blasting operation of the cooling zone based on the heat dissipation state characteristics;

[0055] Step S2, detecting the flue gas flow output after the cooling zone is blown, determining the particle state characteristics and the airflow pressure state characteristics of the flue gas flow; filtering and recycling the flue gas flow based on the particle state characteristics and the airflow pressure state characteristics, so as to store the recycled hot air flow in the hot gas buffer pool;

[0056] Step S3, identifying the kiln car in the preheating zone of the tunnel kiln, obtaining temperature change data of the items loaded in the kiln car in the preheating zone; based on the temperature change data, determining the preheating heat gap state information of the items loaded in the kiln car in the preheating zone;

[0057] Step S4, based on the real-time hot gas recovery status information of the hot gas buffer pool, determine whether the hot gas buffer pool can perform hot gas replenishment operation on the preheating area; based on the preheating heat gap status information, adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating area.

[0058] The control method for recycling waste heat from the cooling zone of the tunnel kiln identifies the heat dissipation state characteristics of the kiln car in the cooling zone of the tunnel kiln, thereby adjusting the blast operation of the cooling zone; detects the particle state characteristics and airflow pressure state characteristics of the flue gas flow output from the cooling zone, thereby filtering and recycling the flue gas flow, and storing the recycled hot air flow in a hot gas buffer pool; identifies the temperature change data of the objects loaded in the kiln car in the preheating zone of the tunnel kiln, thereby determining the preheating heat gap state information of the objects loaded in the kiln car in the preheating zone; based on the real-time hot gas recovery state information of the hot gas buffer pool, determines whether the hot gas buffer pool can perform hot gas supplement operation for the preheating zone, and based on the preheating heat gap state information, adjusts the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone, accurately and centrally collects the heat dissipated in the cooling zone, ensures that an effective and stable supplementary heat source is formed in the hot gas buffer pool, thereby implementing hot gas diversion output to the preheating zone, realizing the recycling of waste heat from the cooling zone to the preheating zone, improving the overall thermal cycle efficiency of the tunnel kiln and reducing the operating cost of the tunnel kiln.

[0059] Preferably, in step S1, a kiln car in a cooling zone of a tunnel kiln is identified to obtain heat dissipation state characteristics of the kiln car in the cooling zone; and based on the heat dissipation state characteristics, an air blast operation of the cooling zone is adjusted, including:

[0060] Dynamic thermal imaging is performed on the internal space of the tunnel kiln cooling zone to obtain dynamic thermal infrared images; the dynamic thermal infrared images are identified to obtain the heat dissipation state characteristics of the kiln car in the cooling zone; the heat dissipation state characteristics include the heat dissipation rate and heat dissipation direction of the kiln car in the entire range;

[0061] Based on the heat dissipation state characteristics, the heat flow movement state characteristics of the internal space of the cooling zone are estimated; wherein the heat flow movement state characteristics include the flow rate and direction of the hot air flow movement formed by the heat flow movement in the internal space of the cooling zone under a natural state; based on the heat flow movement state characteristics, the blowing operation parameters of the internal space of the cooling zone are adjusted so that the hot air flow in the internal space of the cooling zone moves at a uniform speed along a preset direction; wherein the blowing operation parameters include the blowing operation direction and / or the blowing airflow velocity.

[0062] During the operation of the tunnel kiln, the preheating zone, high temperature zone, and cooling zone can operate simultaneously. The kiln cars in different process flows will be transported as a whole to the preheating zone, high temperature zone, and cooling zone, so that the items loaded on different kiln cars enter the preheating operation, high temperature sintering operation, and cooling operation. Among them, the items loaded on the kiln car in the cooling zone of the tunnel kiln have a high temperature after high temperature sintering in the high temperature zone. They will release a lot of heat during the cooling process in the cooling zone. The heat value and heat release radiation direction of different items per unit time are also different. Generally speaking, the higher the temperature of the item, the greater the heat value released per unit time (that is, the greater the heat dissipation rate); the heat release radiation direction of the item (that is, the heat dissipation direction) is related to the appearance of the item itself. Considering that all the items loaded on the kiln car have different temperatures and different appearances, the heat dissipation rate and heat dissipation direction of different items are also different, which makes the heat flow inside the cooling zone after the kiln car dissipates heat as a whole. There is unevenness, that is, there is more heat in some spatial ranges inside the cooling zone, and less heat in other spatial ranges inside the cooling zone. Under natural cooling conditions, the heat dissipated by the kiln car inside the cooling zone cannot be quickly and directional output from the inside of the cooling zone to the outside. In order to improve the efficiency of the centralized recovery of the waste heat inside the cooling zone, it is necessary to use equipment such as blowers to input cold air to the cooling zone in a directional manner, and use the cold air to drive the waste heat inside the cooling zone to flow rapidly and directional, so as to efficiently output the waste heat to the outside for centralized recovery. Considering that the heat flow inside the cooling zone after the kiln car dissipates heat as a whole is uneven, in order to ensure that the cold air output by the blower can maximize the flow of waste heat inside the cooling zone, it is necessary to first perform dynamic thermal imaging and identification of the cooling zone, and obtain the heat dissipation rate and heat dissipation direction of the kiln car in the cooling zone, so as to provide a reliable basis for the subsequent adjustment of the blower's blowing operation.

[0063] The heat dissipation rate and heat dissipation direction of the kiln car in the cooling zone determine the heat flow inside the cooling zone after the kiln car dissipates heat as a whole. To this end, based on the heat dissipation rate and heat dissipation direction of the kiln car in the whole range, the flow rate and direction of the hot air flow formed by the heat flow movement in the internal space of the cooling zone under the natural state are estimated, so as to fully characterize the hot air flow flow in the cooling zone. Then, based on the characteristics of the heat flow movement state, the blasting operation direction and / or blasting air flow velocity of the blasting equipment to the internal space of the cooling zone are adjusted to change the original hot air flow flow in the cooling zone, drive the flow direction and flow velocity of the hot air flow in the cooling zone to change, and make the hot air flow quickly and concentratedly output from the cooling zone along the appropriate direction, thereby realizing the centralized recovery of the hot air flow and providing a stable heat source for the subsequent hot air supplement in the tunnel kiln preheating zone.

[0064] Preferably, in step S2, the flue gas flow output after the cooling zone is blown is detected to determine the particle state characteristics and the airflow pressure state characteristics of the flue gas flow; based on the particle state characteristics and the airflow pressure state characteristics, the flue gas flow is filtered and recycled, so that the recycled hot air flow is stored in the hot gas buffer pool, including:

[0065] The flue gas flow output after the cooling zone is blown is detected and identified to determine the particle state characteristics and airflow pressure state characteristics inside the flue gas flow; wherein the particle state characteristics include the time domain variation characteristics of the particle concentration inside the flue gas flow and the average particle movement speed; the airflow pressure state characteristics include the time domain variation characteristics of the air pressure during the movement of the flue gas flow;

[0066] Based on the particle state characteristics, the electrostatic adsorption parameters for particle filtration treatment of the flue gas flow are adjusted, and based on the airflow pressure state characteristics, the negative pressure adsorption parameters for flue gas flow recovery treatment are adjusted, so that the recovered hot air flow is stored in the hot gas buffer pool.

[0067] Tunnel kilns are used for high-temperature baking of ceramic products, which results in the internal hot air flow being a flue gas flow with a large number of particles. Although these flue gases carry a lot of heat, the large number of particles carried inside these flue gases not only pollute the environment, but if they are directly circulated and transported to the tunnel kiln preheating area, they are likely to cause blockage inside the circulating pipeline, reducing the efficiency of hot gas circulation. In order to reduce the pollution of the flue gas flow to the environment and avoid the flue gas flow from clogging the pipeline, the flue gas flow needs to be dust-reduced before it is circulated to the tunnel kiln preheating area. Generally speaking, in order to improve the collection and convergence efficiency of particles inside the flue gas flow, it is necessary to adaptively adjust the electrostatic adsorption dust removal intensity of the flue gas flow according to the particle concentration inside the flue gas flow and the average movement speed of the particles, to ensure that the flue gas flow passing through the electrostatic adsorption equipment can absorb the particles therein to the maximum extent. To this end, the flue gas flow output after blowing in the cooling zone is detected and identified to determine the particle state characteristics and airflow pressure state characteristics inside the flue gas flow. The particle state characteristics inside the flue gas flow can characterize the particle concentration and the average particle movement speed inside the flue gas flow, and the airflow pressure state characteristics inside the flue gas flow can characterize the time-domain change characteristics of the air pressure during the movement of the flue gas flow. In addition, based on the particle state characteristics, the electrostatic adsorption parameters for particle filtration treatment of the flue gas flow are adjusted. For example, the electrostatic adsorption intensity for particle filtration treatment of the flue gas flow is adjusted according to the particle concentration and the average particle movement speed inside the flue gas flow. The greater the particle concentration or the greater the average particle movement speed, the greater the electrostatic adsorption intensity for particle filtration treatment of the flue gas flow (this can be achieved by increasing the voltage applied to the electrostatic adsorption device); and based on the airflow pressure state characteristics, the negative pressure adsorption parameters for flue gas flow recovery treatment are adjusted. For example, according to the time domain change characteristics of the air pressure of the flue gas flow during the movement, the change in the negative pressure adsorption intensity of the flue gas flow that has completed the filtration treatment is adjusted to ensure that the change in the negative pressure adsorption intensity of the flue gas flow is consistent with the change in the air pressure of the flue gas flow during the movement. Finally, the hot air flow recovered by the negative pressure adsorption is stored in the hot gas buffer pool to ensure that the hot gas buffer pool has a sufficiently high temperature and compressed air as a supplementary heat source to supplement the preheating zone of the tunnel kiln with hot air.

[0068] Preferably, in step S3, a kiln car in the preheating zone of the tunnel kiln is identified to obtain temperature change data of the items loaded in the kiln car in the preheating zone; based on the temperature change data, preheating heat gap state information of the items loaded in the kiln car in the preheating zone is determined, including:

[0069] Perform dynamic thermal imaging of the internal space of the tunnel kiln preheating area to obtain dynamic thermal infrared images; identify the dynamic thermal infrared images to obtain the temperature change data of all items loaded on the kiln car in the preheating area;

[0070] Based on the temperature change data, the temperature increase rate of all items loaded on the kiln car in the preheating area is determined; based on the temperature increase rate, the preheating heat value required for all items to be heated to the target temperature is predicted, which is used as the preheating heat gap status information of the items loaded on the kiln car in the preheating area.

[0071] The tunnel kiln preheating zone is used to uniformly preheat the ceramic body to ensure that the entire ceramic body can be evenly heated to the target temperature. Considering that a large number of ceramic green bodies are loaded in the preheating zone through kiln cars and the heat circulation flow inside the preheating zone is not uniform, all the ceramic green bodies loaded in the kiln car cannot be uniformly preheated to the target temperature within a certain period of time. For example, for the area with less heat inside the preheating zone, the preheating time of the corresponding ceramic green bodies is longer, and for the area with more heat inside the preheating zone, the preheating time of the corresponding ceramic green bodies is shorter, that is, the heat required for preheating the ceramic green bodies in different areas inside the preheating zone to the target temperature is also different. In order to ensure that all the ceramic green bodies loaded in the kiln car inside the preheating zone can be heated to the target temperature within the preset time period, it is necessary to first perform dynamic thermal imaging recognition on the internal space of the tunnel kiln preheating zone to obtain the temperature change data of all the items (i.e., ceramic green bodies) loaded in the kiln car in the preheating zone, so as to determine the temperature increase rate of all the items loaded in the kiln car in the preheating zone, thereby predicting the preheating heat value required for all the items to be heated to the target temperature, which is used as the preheating heat gap state information of the items loaded in the kiln car in the preheating zone, and provides a reliable basis for the subsequent targeted hot gas supplement to the preheating zone using the heat recovered in the hot gas buffer pool.

[0072] Preferably, in step S4, based on the real-time hot gas recovery state information of the hot gas buffer pool, it is judged whether the hot gas buffer pool can perform hot gas supplement operation for the preheating zone; based on the preheating heat gap state information, the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone is adjusted, including:

[0073] Based on the real-time recovered hot gas temperature and hot gas pressure of the hot gas buffer pool, predict the minimum heat received per unit time of the preheating zone after the hot gas buffer pool delivers hot gas to the preheating zone; based on the minimum heat received, determine whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone;

[0074] When the hot gas buffer pool is able to supplement hot gas to the preheating zone, the hot gas supply flow required for all sub-areas inside the preheating zone is determined based on the preheating heat value required to raise the temperature of all items loaded on the kiln car in the preheating zone to the target temperature contained in the preheating heat gap status information; based on the hot gas supply flow, the diversion output gas pressure of the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone is adjusted.

[0075] When the waste heat is continuously recovered from the cooling zone of the tunnel kiln and transported to the hot gas buffer pool, the temperature and pressure of the hot gas recovered inside the hot gas buffer pool also increase continuously. Only when the temperature and pressure of the hot gas recovered inside the hot gas buffer pool are large enough can the hot gas added to the preheating zone of the tunnel kiln be guaranteed to fully and effectively preheat the items in the preheating zone while offsetting the heat dissipation of the preheating zone itself. In order to determine whether the hot gas buffer pool can perform hot gas replenishment operations on the preheating zone, firstly, based on the real-time hot gas temperature and hot gas pressure recovered by the hot gas buffer pool, the minimum heat received per unit time of the preheating zone after the hot gas buffer pool transports hot gas to the preheating zone is predicted, and then the minimum heat received is compared with the heat loss value per unit time of the preheating zone. If the minimum heat received value exceeds the heat loss value, it is determined that the hot gas buffer pool can perform hot gas replenishment operations on the preheating zone; otherwise, it is determined that the hot gas buffer pool cannot perform hot gas replenishment operations on the preheating zone. When the hot gas buffer pool is able to perform hot gas replenishment operations on the preheating zone, the preheating heat value required for all items loaded on the kiln car in the preheating zone to be raised to the target temperature is determined based on the preheating heat gap status information, and the hot gas supply flow required for all sub-areas within the preheating zone is determined. The diversion output pressure of the hot gas diversion output operation performed by the hot gas buffer pool to the preheating zone is adjusted accordingly. Through the above method, targeted hot gas replenishment operations are implemented in different areas of the preheating zone, which can maximize the compensation for the preheating heat gap in different areas of the preheating zone and realize the recycling of waste heat from the cooling zone to the preheating zone.

[0076] See also Figure 2 , is a schematic diagram of a framework of a control system for recycling waste heat from a cooling zone of a tunnel kiln provided in an embodiment of the present invention. The control system for recycling waste heat from a cooling zone of a tunnel kiln includes:

[0077] The cooling zone identification module is used to identify the kiln car in the cooling zone of the tunnel kiln and obtain the heat dissipation state characteristics of the kiln car in the cooling zone;

[0078] An air blowing operation adjustment module, used for adjusting the air blowing operation of the cooling zone based on the characteristics of the heat dissipation state;

[0079] The flue gas flow detection module is used to detect the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and air flow pressure state characteristics of the flue gas flow;

[0080] A flue gas flow processing control module is used to filter and recycle the flue gas flow based on the particle state characteristics and the air flow pressure state characteristics, so as to store the recovered hot air flow in a hot gas buffer pool;

[0081] The preheating zone identification module is used to identify the kiln car in the preheating zone of the tunnel kiln and obtain the temperature change data of the items loaded in the kiln car in the preheating zone;

[0082] A preheating heat gap determination module is used to determine the preheating heat gap status information of the items loaded on the kiln car in the preheating area based on the temperature change data;

[0083] A hot gas buffer pool state judgment module is used to judge whether the hot gas buffer pool can perform hot gas replenishment operation on the preheating area based on the real-time hot gas recovery state information of the hot gas buffer pool;

[0084] The hot gas diversion adjustment module is used to adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating area based on the preheating heat gap status information.

[0085] The waste heat recycling control system of the tunnel kiln cooling zone identifies the heat dissipation state characteristics of the kiln car in the tunnel kiln cooling zone, thereby adjusting the blast operation of the cooling zone; detects the particle state characteristics and airflow pressure state characteristics of the flue gas flow output from the cooling zone, thereby filtering and recycling the flue gas flow, and storing the recycled hot air flow in the hot gas buffer pool; identifies the temperature change data of the items loaded in the kiln car in the tunnel kiln preheating zone, thereby determining the preheating heat gap state information of the items loaded in the kiln car in the preheating zone; based on the real-time hot gas recovery state information of the hot gas buffer pool, it is judged whether the hot gas buffer pool can perform hot gas supplement operation for the preheating zone, and based on the preheating heat gap state information, adjusts the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone, accurately and centrally collects the heat dissipated in the cooling zone, ensures that an effective and stable supplementary heat source is formed in the hot gas buffer pool, thereby implementing hot gas diversion output to the preheating zone, realizing the recycling of waste heat from the cooling zone to the preheating zone, improving the overall thermal cycle efficiency of the tunnel kiln and reducing the operating cost of the tunnel kiln.

[0086] Preferably, the cooling zone identification module is used to identify the kiln car in the cooling zone of the tunnel kiln to obtain the heat dissipation state characteristics of the kiln car in the cooling zone, including:

[0087] Dynamic thermal imaging is performed on the internal space of the tunnel kiln cooling zone to obtain dynamic thermal infrared images; the dynamic thermal infrared images are identified to obtain the heat dissipation state characteristics of the kiln car in the cooling zone; the heat dissipation state characteristics include the heat dissipation rate and heat dissipation direction of the kiln car in the entire range;

[0088] The air blowing operation adjustment module is used to adjust the air blowing operation of the cooling zone based on the heat dissipation state characteristics, including:

[0089] Based on the heat dissipation state characteristics, the heat flow movement state characteristics of the internal space of the cooling zone are estimated; wherein the heat flow movement state characteristics include the flow rate and direction of the hot air flow movement formed by the heat flow movement in the internal space of the cooling zone under a natural state; based on the heat flow movement state characteristics, the blowing operation parameters of the internal space of the cooling zone are adjusted so that the hot air flow in the internal space of the cooling zone moves at a uniform speed along a preset direction; wherein the blowing operation parameters include the blowing operation direction and / or the blowing airflow velocity.

[0090] During the operation of the tunnel kiln, the preheating zone, high temperature zone, and cooling zone can operate simultaneously. The kiln cars in different process flows will be transported as a whole to the preheating zone, high temperature zone, and cooling zone, so that the items loaded on different kiln cars enter the preheating operation, high temperature sintering operation, and cooling operation. Among them, the items loaded on the kiln car in the cooling zone of the tunnel kiln have a high temperature after high temperature sintering in the high temperature zone. They will release a lot of heat during the cooling process in the cooling zone. The heat value and heat release radiation direction of different items per unit time are also different. Generally speaking, the higher the temperature of the item, the greater the heat value released per unit time (that is, the greater the heat dissipation rate); the heat release radiation direction of the item (that is, the heat dissipation direction) is related to the appearance of the item itself. Considering that all the items loaded on the kiln car have different temperatures and different appearances, the heat dissipation rate and heat dissipation direction of different items are also different, which makes the heat flow inside the cooling zone after the kiln car dissipates heat as a whole. There is unevenness, that is, there is more heat in some spatial ranges inside the cooling zone, and less heat in other spatial ranges inside the cooling zone. Under natural cooling conditions, the heat dissipated by the kiln car inside the cooling zone cannot be quickly and directional output from the inside of the cooling zone to the outside. In order to improve the efficiency of the centralized recovery of the waste heat inside the cooling zone, it is necessary to use equipment such as blowers to input cold air to the cooling zone in a directional manner, and use the cold air to drive the waste heat inside the cooling zone to flow rapidly and directional, so as to efficiently output the waste heat to the outside for centralized recovery. Considering that the heat flow inside the cooling zone after the kiln car dissipates heat as a whole is uneven, in order to ensure that the cold air output by the blower can maximize the flow of waste heat inside the cooling zone, it is necessary to first perform dynamic thermal imaging and identification of the cooling zone, and obtain the heat dissipation rate and heat dissipation direction of the kiln car in the cooling zone, so as to provide a reliable basis for the subsequent adjustment of the blower's blowing operation.

[0091] The heat dissipation rate and heat dissipation direction of the kiln car in the cooling zone determine the heat flow inside the cooling zone after the kiln car dissipates heat as a whole. To this end, based on the heat dissipation rate and heat dissipation direction of the kiln car in the whole range, the flow rate and direction of the hot air flow formed by the heat flow movement in the internal space of the cooling zone under the natural state are estimated, so as to fully characterize the hot air flow flow in the cooling zone. Then, based on the characteristics of the heat flow movement state, the blasting operation direction and / or blasting air flow velocity of the blasting equipment to the internal space of the cooling zone are adjusted to change the original hot air flow flow in the cooling zone, drive the flow direction and flow velocity of the hot air flow in the cooling zone to change, and make the hot air flow quickly and concentratedly output from the cooling zone along the appropriate direction, thereby realizing the centralized recovery of the hot air flow and providing a stable heat source for the subsequent hot air supplement in the tunnel kiln preheating zone.

[0092] Preferably, the flue gas flow detection module is used to detect the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and air flow pressure state characteristics of the flue gas flow, including:

[0093] The flue gas flow output after the cooling zone is blown is detected and identified to determine the particle state characteristics and airflow pressure state characteristics inside the flue gas flow; wherein the particle state characteristics include the time domain variation characteristics of the particle concentration inside the flue gas flow and the average particle movement speed; the airflow pressure state characteristics include the time domain variation characteristics of the air pressure during the movement of the flue gas flow;

[0094] The flue gas flow processing control module is used to filter and recycle the flue gas flow based on the particle state characteristics and the airflow pressure state characteristics, so as to store the recovered hot air flow in the hot gas buffer pool, including:

[0095] Based on the particle state characteristics, the electrostatic adsorption parameters for particle filtration treatment of the flue gas flow are adjusted, and based on the airflow pressure state characteristics, the negative pressure adsorption parameters for flue gas flow recovery treatment are adjusted, so that the recovered hot air flow is stored in the hot gas buffer pool.

[0096] Tunnel kilns are used for high-temperature baking of ceramic products, which results in the internal hot air flow being a flue gas flow with a large number of particles. Although these flue gases carry a lot of heat, the large number of particles carried inside these flue gases not only pollute the environment, but if they are directly circulated and transported to the tunnel kiln preheating area, they are likely to cause blockage inside the circulating pipeline, reducing the efficiency of hot gas circulation. In order to reduce the pollution of the flue gas flow to the environment and avoid the flue gas flow from clogging the pipeline, the flue gas flow needs to be dust-reduced before it is circulated to the tunnel kiln preheating area. Generally speaking, in order to improve the collection and convergence efficiency of particles inside the flue gas flow, it is necessary to adaptively adjust the electrostatic adsorption dust removal intensity of the flue gas flow according to the particle concentration inside the flue gas flow and the average movement speed of the particles, to ensure that the flue gas flow passing through the electrostatic adsorption equipment can absorb the particles therein to the maximum extent. To this end, the flue gas flow output after blowing in the cooling zone is detected and identified to determine the particle state characteristics and airflow pressure state characteristics inside the flue gas flow. The particle state characteristics inside the flue gas flow can characterize the particle concentration and the average particle movement speed inside the flue gas flow, and the airflow pressure state characteristics inside the flue gas flow can characterize the time-domain change characteristics of the air pressure during the movement of the flue gas flow. In addition, based on the particle state characteristics, the electrostatic adsorption parameters for particle filtration treatment of the flue gas flow are adjusted. For example, the electrostatic adsorption intensity for particle filtration treatment of the flue gas flow is adjusted according to the particle concentration and the average particle movement speed inside the flue gas flow. The greater the particle concentration or the greater the average particle movement speed, the greater the electrostatic adsorption intensity for particle filtration treatment of the flue gas flow (this can be achieved by increasing the voltage applied to the electrostatic adsorption device); and based on the airflow pressure state characteristics, the negative pressure adsorption parameters for flue gas flow recovery treatment are adjusted. For example, according to the time domain change characteristics of the air pressure of the flue gas flow during the movement, the change in the negative pressure adsorption intensity of the flue gas flow that has completed the filtration treatment is adjusted to ensure that the change in the negative pressure adsorption intensity of the flue gas flow is consistent with the change in the air pressure of the flue gas flow during the movement. Finally, the hot air flow recovered by the negative pressure adsorption is stored in the hot gas buffer pool to ensure that the hot gas buffer pool has a sufficiently high temperature and compressed air as a supplementary heat source to supplement the preheating zone of the tunnel kiln with hot air.

[0097] Preferably, the preheating zone identification module is used to identify the kiln car in the preheating zone of the tunnel kiln, and obtain the temperature change data of the objects loaded in the kiln car in the preheating zone, including:

[0098] Perform dynamic thermal imaging of the internal space of the tunnel kiln preheating area to obtain dynamic thermal infrared images; identify the dynamic thermal infrared images to obtain the temperature change data of all items loaded on the kiln car in the preheating area;

[0099] The preheating heat gap determination module is used to determine the preheating heat gap status information of the items loaded on the kiln car in the preheating area based on the temperature change data, including:

[0100] Based on the temperature change data, the temperature increase rate of all items loaded on the kiln car in the preheating area is determined; based on the temperature increase rate, the preheating heat value required for all items to be heated to the target temperature is predicted, which is used as the preheating heat gap status information of the items loaded on the kiln car in the preheating area.

[0101] The tunnel kiln preheating zone is used to uniformly preheat the ceramic body to ensure that the entire ceramic body can be evenly heated to the target temperature. Considering that a large number of ceramic green bodies are loaded in the preheating zone through kiln cars and the heat circulation flow inside the preheating zone is not uniform, all the ceramic green bodies loaded in the kiln car cannot be uniformly preheated to the target temperature within a certain period of time. For example, for the area with less heat inside the preheating zone, the preheating time of the corresponding ceramic green bodies is longer, and for the area with more heat inside the preheating zone, the preheating time of the corresponding ceramic green bodies is shorter, that is, the heat required for preheating the ceramic green bodies in different areas inside the preheating zone to the target temperature is also different. In order to ensure that all the ceramic green bodies loaded in the kiln car inside the preheating zone can be heated to the target temperature within the preset time period, it is necessary to first perform dynamic thermal imaging recognition on the internal space of the tunnel kiln preheating zone to obtain the temperature change data of all the items (i.e., ceramic green bodies) loaded in the kiln car in the preheating zone, so as to determine the temperature increase rate of all the items loaded in the kiln car in the preheating zone, thereby predicting the preheating heat value required for all the items to be heated to the target temperature, which is used as the preheating heat gap state information of the items loaded in the kiln car in the preheating zone, and provides a reliable basis for the subsequent targeted hot gas supplement to the preheating zone using the heat recovered in the hot gas buffer pool.

[0102] Preferably, the hot gas buffer pool state judgment module is used to judge whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone based on the real-time hot gas recovery state information of the hot gas buffer pool, including:

[0103] Based on the real-time recovered hot gas temperature and hot gas pressure of the hot gas buffer pool, predict the minimum heat received per unit time of the preheating zone after the hot gas buffer pool delivers hot gas to the preheating zone; based on the minimum heat received, determine whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone;

[0104] The hot gas diversion adjustment module is used to adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating area based on the preheating heat gap state information, including:

[0105] When the hot gas buffer pool is able to supplement hot gas to the preheating zone, the hot gas supply flow required for all sub-areas inside the preheating zone is determined based on the preheating heat value required to raise the temperature of all items loaded on the kiln car in the preheating zone to the target temperature contained in the preheating heat gap status information; based on the hot gas supply flow, the diversion output gas pressure of the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone is adjusted.

[0106] When the waste heat is continuously recovered from the cooling zone of the tunnel kiln and transported to the hot gas buffer pool, the temperature and pressure of the hot gas recovered inside the hot gas buffer pool also increase continuously. Only when the temperature and pressure of the hot gas recovered inside the hot gas buffer pool are large enough can the hot gas added to the preheating zone of the tunnel kiln be guaranteed to fully and effectively preheat the items in the preheating zone while offsetting the heat dissipation of the preheating zone itself. In order to determine whether the hot gas buffer pool can perform hot gas replenishment operations on the preheating zone, firstly, based on the real-time hot gas temperature and hot gas pressure recovered by the hot gas buffer pool, the minimum heat received per unit time of the preheating zone after the hot gas buffer pool transports hot gas to the preheating zone is predicted, and then the minimum heat received is compared with the heat loss value per unit time of the preheating zone. If the minimum heat received value exceeds the heat loss value, it is determined that the hot gas buffer pool can perform hot gas replenishment operations on the preheating zone; otherwise, it is determined that the hot gas buffer pool cannot perform hot gas replenishment operations on the preheating zone. When the hot gas buffer pool is able to perform hot gas replenishment operations on the preheating zone, the preheating heat value required for all items loaded on the kiln car in the preheating zone to be raised to the target temperature is determined based on the preheating heat gap status information, and the hot gas supply flow required for all sub-areas within the preheating zone is determined. The diversion output pressure of the hot gas diversion output operation performed by the hot gas buffer pool to the preheating zone is adjusted accordingly. Through the above method, targeted hot gas replenishment operations are implemented in different areas of the preheating zone, which can maximize the compensation for the preheating heat gap in different areas of the preheating zone and realize the recycling of waste heat from the cooling zone to the preheating zone.

[0107] It can be seen from the contents of the above embodiments that the control method and system for recycling waste heat from the cooling zone of the tunnel kiln identify the heat dissipation state characteristics of the kiln car in the cooling zone of the tunnel kiln, thereby adjusting the blast operation of the cooling zone; detect the particle state characteristics and airflow pressure state characteristics of the flue gas flow output from the cooling zone, thereby filtering and recycling the flue gas flow, and storing the recycled hot air flow in the hot gas buffer pool; identify the temperature change data of the objects loaded in the kiln car in the preheating zone of the tunnel kiln, thereby determining the preheating heat gap state information of the objects loaded in the kiln car in the preheating zone; based on the real-time hot gas recovery state information of the hot gas buffer pool, determine whether the hot gas buffer pool can perform hot gas supplement operation on the preheating zone, and based on the preheating heat gap state information, adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone, accurately and centrally collect the heat dissipated in the cooling zone, ensure that an effective and stable supplementary heat source is formed in the hot gas buffer pool, thereby implementing hot gas diversion output to the preheating zone, realizing the recycling of waste heat from the cooling zone to the preheating zone, improving the overall thermal cycle efficiency of the tunnel kiln and reducing the operating cost of the tunnel kiln.

[0108] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A control method for recycling waste heat from the cooling zone of a tunnel kiln, characterized in that: It includes the following steps: Step S1, identifying a kiln car in a cooling zone of a tunnel kiln, obtaining heat dissipation state characteristics of the kiln car in the cooling zone; and adjusting the blasting operation of the cooling zone based on the heat dissipation state characteristics; Step S2, detecting the flue gas flow output after the cooling zone is blown, and determining the particle state characteristics and the airflow pressure state characteristics of the flue gas flow; Based on the particle state characteristics and the airflow pressure state characteristics, the flue gas flow is filtered and recovered, so as to store the recovered hot air flow in a hot gas buffer pool; Step S3, identifying the kiln car in the preheating zone of the tunnel kiln, obtaining temperature change data of the objects loaded in the kiln car in the preheating zone; determining the preheating heat gap state information of the objects loaded in the kiln car in the preheating zone based on the temperature change data; Step S4, based on the real-time hot gas recovery status information of the hot gas buffer pool, determine whether the hot gas buffer pool can perform hot gas replenishment operation for the preheating zone; based on the preheating heat gap status information, adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone.

2. The method for controlling the reuse of waste heat removed from the cooling zone of a tunnel kiln as claimed in claim 1, characterized in that: In the step S1, a kiln car in the cooling zone of the tunnel kiln is identified to obtain the heat dissipation state characteristics of the kiln car in the cooling zone; Based on the heat dissipation state characteristics, adjusting the air blowing operation of the cooling zone includes: Dynamic thermal imaging is performed on the internal space of the tunnel kiln cooling zone to obtain a dynamic thermal infrared image; the dynamic thermal infrared image is identified to obtain the heat dissipation state characteristics of the kiln car in the cooling zone; wherein the heat dissipation state characteristics include the heat dissipation rate and heat dissipation direction of the kiln car in the entire range; Based on the heat dissipation state characteristics, the heat flow movement state characteristics of the internal space of the cooling zone are estimated; wherein, the heat flow movement state characteristics include the flow rate and direction of the hot air flow movement formed by the heat flow movement in the internal space of the cooling zone under a natural state; based on the heat flow movement state characteristics, the blowing operation parameters of the internal space of the cooling zone are adjusted so that the hot air flow in the internal space of the cooling zone moves at a uniform speed along a preset direction; wherein, the blowing operation parameters include the blowing operation direction and / or the blowing airflow velocity.

3. The method for controlling the reuse of waste heat removed from the cooling zone of a tunnel kiln as claimed in claim 1, characterized in that: In the step S2, the flue gas flow output after the cooling zone is blown is detected to determine the particle state characteristics and the air flow pressure state characteristics of the flue gas flow; Based on the particle state characteristics and the airflow pressure state characteristics, the flue gas flow is filtered and recovered, so as to store the recovered hot air flow in a hot gas buffer pool, including: Detect and identify the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and airflow pressure state characteristics inside the flue gas flow; wherein the particle state characteristics include the time domain variation characteristics of the particle concentration and the average particle movement speed inside the flue gas flow; the airflow pressure state characteristics include the time domain variation characteristics of the air pressure of the flue gas flow during movement; Based on the particle state characteristics, the electrostatic adsorption parameters for particle filtration treatment of the flue gas flow are adjusted, and based on the airflow pressure state characteristics, the negative pressure adsorption parameters for recovery treatment of the flue gas flow are adjusted, so that the recovered hot air flow is stored in a hot gas buffer pool.

4. The method for controlling the reuse of waste heat removed from the cooling zone of a tunnel kiln as claimed in claim 1, characterized in that: In the step S3, the kiln car in the preheating zone of the tunnel kiln is identified to obtain temperature change data of the objects loaded in the kiln car in the preheating zone; based on the temperature change data, the preheating heat gap state information of the objects loaded in the kiln car in the preheating zone is determined, including: Perform dynamic thermal imaging on the internal space of the tunnel kiln preheating zone to obtain a dynamic thermal infrared image; perform recognition on the dynamic thermal infrared image to obtain temperature change data of all items loaded on the kiln car in the preheating zone; Based on the temperature change data, the temperature increase rate of all the items loaded on the kiln car in the preheating zone is determined; based on the temperature increase rate, the preheating heat value required for all the items to be heated to the target temperature is predicted, which is used as the preheating heat gap status information of the items loaded on the kiln car in the preheating zone.

5. The method for controlling the reuse of waste heat removed from the cooling zone of a tunnel kiln as claimed in claim 1, characterized in that: In step S4, based on the real-time hot gas recovery state information of the hot gas buffer pool, it is judged whether the hot gas buffer pool can perform hot gas supplement operation for the preheating zone; based on the preheating heat gap state information, the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating zone is adjusted, including: Based on the real-time recovered hot gas temperature and hot gas pressure of the hot gas buffer pool, predict the minimum received heat value per unit time of the preheating zone after the hot gas buffer pool delivers hot gas to the preheating zone; based on the minimum received heat value, determine whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone; When the hot gas buffer pool is able to perform hot gas replenishment operations on the preheating zone, the hot gas supply flow rate required for all sub-areas within the preheating zone is determined based on the preheating heat value required to raise the temperature of all items loaded on the kiln car in the preheating zone to the target temperature as contained in the preheating heat gap status information; and the diversion output gas pressure of the hot gas diversion output operation performed by the hot gas buffer pool to the preheating zone is adjusted based on the hot gas supply flow rate.

6. The waste heat recycling control system of the tunnel kiln cooling zone is characterized by: include: A cooling zone identification module is used to identify the kiln car in the cooling zone of the tunnel kiln and obtain the heat dissipation state characteristics of the kiln car in the cooling zone; An air blowing operation adjustment module, used for adjusting the air blowing operation of the cooling zone based on the heat dissipation state characteristics; A flue gas flow detection module, used to detect the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and air flow pressure state characteristics of the flue gas flow; A flue gas flow processing control module, configured to filter and recycle the flue gas flow based on the particle state characteristics and the gas flow pressure state characteristics, so as to store the recycle hot gas flow in a hot gas buffer pool; A preheating zone identification module, used to identify the kiln car in the preheating zone of the tunnel kiln, and obtain temperature change data of the objects loaded in the kiln car in the preheating zone; A preheating heat gap determination module, used to determine the preheating heat gap state information of the articles loaded on the kiln car in the preheating zone based on the temperature change data; A hot gas buffer pool state judgment module, used to judge whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone based on the real-time hot gas recovery state information of the hot gas buffer pool; A hot gas diversion adjustment module is used to adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating area based on the preheating heat gap state information.

7. The waste heat recycling control system of the tunnel kiln cooling zone as claimed in claim 6, characterized in that: The cooling zone identification module is used to identify the kiln car in the cooling zone of the tunnel kiln, and obtain the heat dissipation state characteristics of the kiln car in the cooling zone, including: Dynamic thermal imaging is performed on the internal space of the tunnel kiln cooling zone to obtain a dynamic thermal infrared image; the dynamic thermal infrared image is identified to obtain the heat dissipation state characteristics of the kiln car in the cooling zone; wherein the heat dissipation state characteristics include the heat dissipation rate and heat dissipation direction of the kiln car in the entire range; The air blowing operation adjustment module is used to adjust the air blowing operation of the cooling zone based on the heat dissipation state characteristics, including: Based on the heat dissipation state characteristics, the heat flow movement state characteristics of the internal space of the cooling zone are estimated; wherein, the heat flow movement state characteristics include the flow rate and direction of the hot air flow movement formed by the heat flow movement in the internal space of the cooling zone under a natural state; based on the heat flow movement state characteristics, the blowing operation parameters of the internal space of the cooling zone are adjusted so that the hot air flow in the internal space of the cooling zone moves at a uniform speed along a preset direction; wherein, the blowing operation parameters include the blowing operation direction and / or the blowing airflow velocity.

8. The waste heat recycling control system of the tunnel kiln cooling zone as claimed in claim 6, characterized in that: The flue gas flow detection module is used to detect the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and air flow pressure state characteristics of the flue gas flow, including: Detect and identify the flue gas flow output after the cooling zone is blown, and determine the particle state characteristics and airflow pressure state characteristics inside the flue gas flow; wherein the particle state characteristics include the time domain variation characteristics of the particle concentration and the average particle movement speed inside the flue gas flow; the airflow pressure state characteristics include the time domain variation characteristics of the air pressure of the flue gas flow during movement; The flue gas flow processing control module is used to filter and recycle the flue gas flow based on the particle state characteristics and the gas flow pressure state characteristics, so as to store the recovered hot gas flow in a hot gas buffer pool, including: Based on the particle state characteristics, the electrostatic adsorption parameters for particle filtration treatment of the flue gas flow are adjusted, and based on the airflow pressure state characteristics, the negative pressure adsorption parameters for recovery treatment of the flue gas flow are adjusted, so that the recovered hot air flow is stored in a hot gas buffer pool.

9. The waste heat recycling control system of the tunnel kiln cooling zone as claimed in claim 6, characterized in that: The preheating zone identification module is used to identify the kiln car in the preheating zone of the tunnel kiln and obtain temperature change data of the objects loaded in the kiln car in the preheating zone, including: Perform dynamic thermal imaging on the internal space of the tunnel kiln preheating zone to obtain a dynamic thermal infrared image; perform recognition on the dynamic thermal infrared image to obtain temperature change data of all items loaded on the kiln car in the preheating zone; The preheating heat gap determination module is used to determine the preheating heat gap state information of the articles loaded on the kiln car in the preheating zone based on the temperature change data, including: Based on the temperature change data, the temperature increase rate of all the items loaded on the kiln car in the preheating zone is determined; based on the temperature increase rate, the preheating heat value required for all the items to be heated to the target temperature is predicted, which is used as the preheating heat gap status information of the items loaded on the kiln car in the preheating zone.

10. The waste heat recycling control system of the tunnel kiln cooling zone as claimed in claim 6, characterized in that: The hot gas buffer pool state judgment module is used to judge whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone based on the real-time hot gas recovery state information of the hot gas buffer pool, including: Based on the real-time recovered hot gas temperature and hot gas pressure of the hot gas buffer pool, predict the minimum received heat value per unit time of the preheating zone after the hot gas buffer pool delivers hot gas to the preheating zone; based on the minimum received heat value, determine whether the hot gas buffer pool can perform hot gas supplementation operation on the preheating zone; The hot gas diversion adjustment module is used to adjust the hot gas diversion output operation implemented by the hot gas buffer pool to the preheating area based on the preheating heat gap state information, including: When the hot gas buffer pool is able to perform hot gas replenishment operations on the preheating zone, the hot gas supply flow rate required for all sub-areas within the preheating zone is determined based on the preheating heat value required to raise the temperature of all items loaded on the kiln car in the preheating zone to the target temperature as contained in the preheating heat gap status information; and the diversion output gas pressure of the hot gas diversion output operation performed by the hot gas buffer pool to the preheating zone is adjusted based on the hot gas supply flow rate.

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