Integrated waste heat recovery and heat exchange system

Abstract

The invention discloses an integrated waste heat recovery and heat exchange system, relates to the technical field of waste heat recovery, and judges whether waste heat recovery can be performed on high-temperature slag and blast furnace gas or not by analyzing the components of the high-temperature slag and the blast furnace gas generated after blast furnace ironmaking and the content of each component. After it is determined that waste heat recovery can be conducted on the high-temperature slag and the blast furnace gas, air cooling heat exchange is conducted on the high-temperature slag firstly, the recovered heat is applied to blast furnace ironmaking again, and therefore cyclic utilization of the heat is achieved, liquid cooling heat exchange is conducted on the high-temperature slag obtained after air cooling heat exchange is completed, and meanwhile liquid cooling heat exchange is conducted on the blast furnace gas; and heat obtained after liquid-cooling heat exchange of the high-temperature slag and liquid-cooling heat exchange of the blast furnace gas is stored in the liquid storage tank, so that heat energy is supplied in time in the factory energy demand peak or when heat energy is needed in other production links, and finally, the high-temperature slag and the blast furnace gas after heat exchange are recycled, so that comprehensive utilization of resources is realized.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery technology, specifically to an integrated waste heat recovery heat exchange system. Background Technology

[0002] During the blast furnace ironmaking process, a large amount of high-temperature slag and blast furnace gas are generated. The high-temperature slag and blast furnace gas carry a large amount of heat energy. Through the waste heat recovery device, this heat energy can be converted into a usable energy form, thereby realizing the cascade utilization of energy and making the originally wasted heat effectively utilized, thereby improving the energy utilization efficiency of the entire ironmaking system and reducing energy consumption and production costs. Therefore, this application proposes an integrated waste heat recovery heat exchange system.

[0003] Existing technologies, such as the invention patent application with publication number CN115615208A, disclose a flue gas waste heat recovery system, which includes a spray-type heat exchange tower for recovering latent heat and a sensible heat recovery mechanism for recovering sensible heat. One end of the sensible heat recovery mechanism is provided with a flue gas inlet, and the other end is connected to the spray-type heat exchange tower. The flue gas first enters the sensible heat recovery mechanism for sensible heat exchange, and the flue gas after sensible heat exchange enters the spray-type heat exchange tower for latent heat exchange. Compared with traditional waste heat recovery systems, it has multiple operating modes, including single sensible heat recovery, simultaneous recovery of sensible and latent heat, and separate recovery of sensible and latent heat. It realizes the tiered recovery and utilization of flue gas waste heat, making the recovery more thorough and efficient. Furthermore, since only sensible heat in the flue gas is recovered in the sensible heat recovery mechanism, the requirements for the corrosion resistance of the heat exchanger are lower, thus reducing the cost of flue gas waste heat recovery.

[0004] The above-mentioned solution has the following technical problems: 1. The current technology connects the sensible heat recovery mechanism to the flue gas inlet and the spray heat exchange tower respectively. The flue gas exchanges sensible heat through the sensible heat recovery mechanism and then enters the spray heat exchange tower for latent heat exchange. However, the current technology does not take into account whether the flue gas entering the sensible heat recovery mechanism meets the heat exchange conditions. When the flue gas temperature is low or the dust content in the flue gas is high, the waste heat recovery of the flue gas cannot achieve the expected recovery effect, and the dust in the flue gas may affect the operation of the recovery device.

[0005] 2. The current technology does not explain the treatment of flue gas after sensible heat recovery, nor does it explain the use of the recovered heat. The current technology’s neglect of this aspect leads to the lack of completeness of the flue gas waste heat recovery and utilization system. Summary of the Invention

[0006] The purpose of this application is to provide an integrated waste heat recovery and heat exchange system that solves the problems existing in the background technology.

[0007] To solve the above-mentioned technical problems, this application adopts the following technical solution: This application provides an integrated waste heat recovery heat exchange system, including: an analysis module, a waste heat recovery module and a waste treatment module.

[0008] Analysis module: Used to analyze the high-temperature slag and blast furnace gas generated during the blast furnace ironmaking process, and then determine whether the high-temperature slag and blast furnace gas generated during the blast furnace ironmaking process can be recovered as waste heat.

[0009] Waste heat recovery module: When it is determined that waste heat recovery is possible from high-temperature slag and blast furnace gas, the module recovers waste heat from the high-temperature slag and blast furnace gas and reuses the recovered heat.

[0010] Waste treatment module: Used to treat high-temperature slag and blast furnace gas from the waste treatment system.

[0011] The beneficial effects of this application are as follows: 1. This application analyzes the composition and content of each component of the high-temperature slag and blast furnace gas produced after blast furnace ironmaking to determine whether the high-temperature slag and blast furnace gas can be recycled for waste heat. After determining that the high-temperature slag and blast furnace gas can be recycled for waste heat, the high-temperature slag is first subjected to air cooling heat exchange, and the recovered heat is reused in blast furnace ironmaking, thereby realizing the recycling of heat. Then, the high-temperature slag after air cooling heat exchange is subjected to liquid cooling heat exchange, and the blast furnace gas is subjected to liquid cooling heat exchange at the same time. The heat after the liquid cooling heat exchange of the high-temperature slag and the blast furnace gas is stored in the liquid storage tank, so as to supply heat energy in a timely manner when the energy demand of the plant is at its peak or when other production links need heat energy. Finally, the high-temperature slag and blast furnace gas after the heat exchange are recycled, thereby realizing the comprehensive utilization of resources.

[0012] 2. This application analyzes the high-temperature slag and blast furnace gas generated during the blast furnace ironmaking process to determine whether the high-temperature slag and blast furnace gas can be recovered as waste heat. When the high-temperature slag contains a large amount of high-melting-point or high-viscosity substances, it is difficult for them to fully contact the heat exchange materials during the heat exchange process. Furthermore, when the blast furnace gas contains a large amount of dust or moisture, it can lead to corrosion of the heat exchange equipment. Therefore, analyzing the high-temperature slag and blast furnace gas greatly ensures the waste heat recovery efficiency of the high-temperature slag and blast furnace gas, while also more effectively protecting the equipment from corrosion and increasing the service life of the heat exchange equipment.

[0013] 3. This application achieves heat recycling by using air cooling to exchange heat from high-temperature slag, thereby reducing the demand for external energy during ironmaking and lowering energy costs. The high-temperature slag after air cooling is then subjected to liquid cooling, and the blast furnace gas is simultaneously subjected to liquid cooling. This step-by-step cooling method avoids thermal shock to the equipment caused by excessive temperature differences when the high-temperature slag directly enters the liquid cooling system, protecting the liquid cooling equipment and related pipelines. Finally, the heat from the liquid cooling of the high-temperature slag and blast furnace gas is stored in a storage tank. The stored heat can be supplied promptly during peak energy demand periods in the plant or when other production processes require heat, increasing production flexibility and the ability to respond to emergencies, and ensuring the continuity and stability of production.

[0014] 4. This application, by recovering and treating the high-temperature slag and blast furnace gas after waste heat recovery, not only reduces the emission of industrial waste and the potential harm to the environment, but also realizes the comprehensive utilization of resources, which is conducive to the long-term development of the industry. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the system structure connection of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Reference Figure 1 As shown, this application provides an integrated waste heat recovery heat exchange system, including the following modules: Analysis module: used to analyze the high-temperature slag and blast furnace gas generated during the blast furnace ironmaking process, and then determine whether the high-temperature slag and blast furnace gas generated during the blast furnace ironmaking process can be recovered as waste heat.

[0019] In a specific example, the analysis of high-temperature slag and blast furnace gas generated during the blast furnace ironmaking process is used to determine whether waste heat recovery can be performed on the high-temperature slag and blast furnace gas, and to process the high-temperature slag and blast furnace gas accordingly. The specific analysis process is as follows: The composition information of the high-temperature slag and the composition information of the blast furnace gas are obtained. Based on the composition information of the high-temperature slag, the content of corrosive substances and low-fluidity substances in the high-temperature slag are extracted. The content of highly corrosive substances and low-fluidity substances in the high-temperature slag are added together to obtain the total content of heat-transferring substances in the high-temperature slag. Similarly, based on the composition information of the blast furnace gas, the dust content and moisture content in the blast furnace gas are obtained. The dust content and moisture content in the blast furnace gas are added together to obtain the total content of heat-transferring substances in the blast furnace gas.

[0020] It should be noted that the highly corrosive substances include fluorides and sulfides, which can corrode the heat exchange system; the low-flow-rate substances include pyrite and forsterite, which have poor flow-rate and tend to form a dense structure during cooling, making it difficult to fully contact the heat exchange medium, thus resulting in low heat exchange efficiency.

[0021] It should be noted that when the dust and moisture content in the blast furnace gas is too high, it will cause equipment wear and tear, thereby reducing heat exchange efficiency.

[0022] The total content of impedance heat transfer substances in high-temperature slag is compared with a set threshold for the total content of impedance heat transfer substances in high-temperature slag. If the total content of impedance heat transfer substances in high-temperature slag is greater than the set threshold, it is determined that the high-temperature slag cannot be used for waste heat recovery and is transferred to the waste treatment system. Conversely, if the total content of impedance heat transfer substances in high-temperature slag is less than the set threshold, it is determined that the high-temperature slag can be used for waste heat recovery and is transferred to the waste heat recovery system.

[0023] Similarly, the total content of impedance heat transfer substances in blast furnace gas is compared with the set threshold for the total content of impedance heat transfer substances in blast furnace gas. If the total content of impedance heat transfer substances in blast furnace gas is greater than the set threshold, it is determined that the blast furnace gas cannot be recovered for waste heat and is transferred to the waste treatment system. Conversely, if the total content is less than the threshold, it is determined that the blast furnace gas can be recovered for waste heat and is transferred to the waste heat recovery system.

[0024] It should be noted that the threshold value of the total content of resistive substances in the high-temperature slag is set by the relevant personnel. For example, in order to ensure the waste heat recovery efficiency of the high-temperature slag, the threshold value of the total content of resistive substances in the high-temperature slag can be set to 10% of the total content of blast furnace slag. The threshold value of the total content of resistive heat transfer substances in the blast furnace gas is set in the same way as that of the high-temperature slag, so it will not be described again.

[0025] In a specific example, the process of obtaining the composition information of high-temperature slag and blast furnace gas is as follows: After the blast furnace ironmaking is completed, the detection system collects a sample of high-temperature slag of arbitrary weight. First, the high-temperature slag sample is ground and then scanned using an XRD instrument to obtain the X-ray diffraction patterns of each substance in the high-temperature slag sample. The X-ray diffraction patterns of each substance are compared with the standard diffraction pattern library to obtain the contents of each substance in the blast furnace slag sample. The intensity of the diffraction peak of each substance is compared with the intensity of the corresponding content standard curve to obtain the content of each substance.

[0026] During the blast furnace ironmaking process, the probe of the light scattering dust meter is connected to the blast furnace gas pipeline. After the blast furnace ironmaking is completed, the light scattering dust meter is activated to directly measure the dust content in the blast furnace gas. At the same time, a humidity sensor is installed at the port of the blast furnace gas pipeline to determine the moisture content of the blast furnace gas.

[0027] It should be noted that the content of each substance in the blast furnace slag sample with known content is used as the abscissa, and the corresponding diffraction peak intensity is used as the ordinate, so as to draw the content standard curve of each substance.

[0028] Waste heat recovery module: When it is determined that waste heat recovery is possible from high-temperature slag and blast furnace gas, the module recovers waste heat from the high-temperature slag and blast furnace gas and reuses the recovered heat.

[0029] In a specific example, the waste heat recovery process for high-temperature slag and blast furnace gas is as follows: First, the high-temperature slag undergoes a primary heat exchange through an integrated waste heat exchanger, and the recovered heat is transferred to the tuyeres of the blast furnace for ironmaking. Then, the high-temperature slag undergoes a secondary heat exchange after the primary heat exchange, while the blast furnace gas undergoes a heat exchange simultaneously. The heat recovered from the secondary heat exchange of the high-temperature slag and the blast furnace gas is stored in a storage tank.

[0030] It should be noted that the primary heat exchange is air-cooled heat exchange, and the secondary heat exchange is liquid-cooled heat exchange. Since the heat recovery efficiency of air-cooled heat exchange is relatively low, liquid-cooled heat exchange is used for high-temperature slag to improve the heat recovery efficiency of high-temperature slag.

[0031] In a specific example, the process of performing a primary heat exchange on high-temperature slag using an integrated waste heat exchanger in the plant area is as follows: The high-temperature slag produced by blast furnace ironmaking is transported to the inlet of the air-cooled heat exchange system via a conveying device, and then transported from the inlet to the heat exchange chamber. A material distribution device is installed in the heat exchange chamber to ensure that the high-temperature slag is evenly distributed in the heat exchange chamber. At this time, the guide plate is opened to allow airflow to enter the heat exchange chamber and flow through the slag layer, thereby recovering waste heat from the high-temperature slag. Simultaneously, the temperature of the high-temperature slag in the heat exchange chamber is monitored in real time by a temperature sensor in the heat exchange chamber. When the temperature of the high-temperature slag reaches the temperature threshold after the primary heat exchange, the high-temperature slag is discharged from the discharge port of the heat exchange chamber and sent to the inlet of the liquid-cooled heat exchange system via a conveying device.

[0032] It should be noted that the fabric feeding device includes a rotary vibrator or a fabric screen, etc.

[0033] It should be noted that the temperature threshold after the first-stage heat exchange is the cutoff temperature value during the air-cooled heat exchange of high-temperature slag. When the temperature of the high-temperature slag reaches the temperature threshold after the first-stage heat exchange, the air-cooled heat exchange of the high-temperature slag ends. The temperature threshold after the first-stage heat exchange is set by the relevant personnel. For example, the average temperature of each blast furnace slag after the historical air-cooled heat exchange can be used as the temperature threshold after the first-stage heat exchange. No specific restrictions are imposed here.

[0034] In a specific example, the process of performing secondary heat exchange on the high-temperature slag after the first heat exchange, while simultaneously exchanging heat with the blast furnace gas, is as follows: The high-temperature slag is conveyed to the inlet of the liquid-cooled heat exchange system via a conveying device. Then, a circulating pump is started to circulate the liquid medium in the heat exchanger on the heat exchange chamber wall. After ensuring that the heat exchanger is filled with liquid, the inlet valve of the liquid-cooled heat exchange system is opened to allow the high-temperature slag to enter the heat exchange chamber. During the heat exchange process, the high-temperature slag in the heat exchange chamber is stirred. At the same time, the temperature of the high-temperature slag is monitored in real time by a temperature sensor in the heat exchange chamber. When the temperature of the high-temperature slag reaches the temperature threshold after the second heat exchange, the high-temperature slag is discharged from the discharge port of the heat exchange chamber and sent to the waste treatment system of the heat exchange system via a conveying device. Similarly, the blast furnace gas is conveyed to the liquid-cooled heat exchange pipeline for waste heat recovery. The blast furnace gas is also heat-exchanged in the same way as the high-temperature slag undergoes secondary heat exchange.

[0035] It should be noted that the temperature threshold after the secondary heat exchange is the cutoff temperature value during the liquid cooling heat exchange of high-temperature slag. When the temperature of the high-temperature slag reaches the temperature threshold after the secondary heat exchange, the liquid cooling heat exchange of the high-temperature slag ends. The setting method of the temperature threshold after the secondary heat exchange is the same as that of the temperature threshold after the primary heat exchange, so it will not be described again.

[0036] In a specific example, the process of reusing the heat recovered from high-temperature slag and high-temperature gas is as follows: the hot gas flow obtained after the high-temperature slag undergoes a primary heat exchange is transmitted to the tuyere of the blast furnace through a hot air pipeline, thereby achieving the heat supply for the blast furnace ironmaking, and determining whether the total heat recovered after the primary heat exchange of the high-temperature slag meets the current heat supply requirements of the blast furnace ironmaking.

[0037] The liquid medium obtained after secondary heat exchange of high-temperature slag and blast furnace gas is stored in a storage tank, and the heat of the liquid medium stored in the storage tank is regulated and controlled.

[0038] In a specific example, the process of determining whether the total heat recovered after one heat exchange of high-temperature slag meets the current heat supply demand of blast furnace ironmaking is as follows: The total heat consumed by each blast furnace in history is obtained from the data center. Based on the total heat consumed by each blast furnace in history, the current heat supply demand of blast furnace ironmaking is predicted. The total heat recovered after one heat exchange of high-temperature slag is compared with the predicted current heat supply demand of blast furnace ironmaking. When the total heat recovered after one heat exchange of high-temperature slag is greater than or equal to the predicted current heat supply demand of blast furnace ironmaking, it is determined that the total heat recovered after one heat exchange of high-temperature slag meets the current heat supply demand of blast furnace ironmaking, and this method is used to supply heat to the blast furnace ironmaking.

[0039] When the total heat recovered after one heat exchange of high-temperature slag is less than the predicted heat supply demand for the current blast furnace ironmaking, it is determined that the total heat recovered after one heat exchange of high-temperature slag meets the current heat supply demand for the current blast furnace ironmaking. In this case, auxiliary heating is required for the blast furnace ironmaking process.

[0040] It should be noted that the auxiliary heating includes preheating the raw materials with waste heat before blast furnace ironmaking and injecting pulverized coal and natural gas fuel into the blast furnace.

[0041] In a specific example, the process of regulating and controlling the heat of the liquid medium stored in the liquid storage tank is as follows: The total heat of the liquid medium obtained after secondary heat exchange with high-temperature slag and blast furnace gas, and the total heat of the original liquid medium in the liquid storage tank are obtained. The total heat of the liquid medium obtained after secondary heat exchange with high-temperature slag and blast furnace gas, and the total heat of the original liquid medium in the liquid storage tank are added together to obtain the current total heat of the liquid medium in the liquid storage tank. The current total heat of the liquid medium in the liquid storage tank is compared with a set standard range of total heat stored in the liquid storage tank. If the current total heat of the liquid medium in the liquid storage tank is less than the lower limit of the set standard range of total heat stored in the liquid storage tank, a buzzer alarm is triggered, and the use of the heat stored in the liquid storage tank for the operation of plant equipment is stopped. If the current total heat of the liquid medium in the liquid storage tank is greater than the upper limit of the set standard range of total heat stored in the liquid storage tank, the heat stored in the liquid storage tank is used for the operation of plant equipment.

[0042] It should be noted that the total heat of the liquid medium is the product of the liquid medium's mass, specific heat capacity, and temperature.

[0043] It should be noted that the standard range of total heat stored in the liquid storage tank is set by the relevant personnel. For example, half of the maximum heat stored in the liquid storage tank can be recorded as the upper limit of the standard range of total heat stored in the liquid storage tank, and one-quarter of the maximum heat stored in the liquid storage tank can be recorded as the lower limit of the standard range of total heat stored in the liquid storage tank. No specific restrictions are imposed here.

[0044] It should be noted that the use of the heat stored in the liquid storage tank for the operation of equipment in the plant area includes generating electricity and providing lighting for the equipment.

[0045] Waste treatment module: Used to treat high-temperature slag and blast furnace gas from the waste treatment system.

[0046] In a specific example, the process of treating the high-temperature slag and blast furnace gas of the waste treatment module is as follows: the waste high-temperature slag is water-quenched, the slag generated during the treatment process is recycled as an admixture for industrial production, and the steam generated during the treatment process is recovered as waste heat.

[0047] Waste blast furnace gas is treated by dust removal, desulfurization, ammonia removal and dehydration before being used as fuel to heat boilers and heating furnace equipment.

[0048] It should be noted that the water quenching treatment is existing technology, and therefore will not be described in detail.

[0049] By analyzing the composition and content of high-temperature slag and blast furnace gas produced after blast furnace ironmaking, it is determined whether the high-temperature slag and blast furnace gas can be recycled for waste heat. After confirming that the high-temperature slag and blast furnace gas can be recycled for waste heat, the high-temperature slag is first subjected to air cooling heat exchange, and the recovered heat is reused in blast furnace ironmaking, thereby realizing the recycling of heat. Then, the high-temperature slag after air cooling heat exchange is subjected to liquid cooling heat exchange, and the blast furnace gas is also subjected to liquid cooling heat exchange. The heat from the liquid cooling heat exchange of the high-temperature slag and blast furnace gas is stored in a storage tank, so that it can be supplied in a timely manner when the plant's energy demand is high or when other production processes require heat energy. Finally, the high-temperature slag and blast furnace gas after heat exchange are recovered and processed, thereby realizing the comprehensive utilization of resources.

[0050] The above content is merely an example and illustration of the concept of this application. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the inventive concept or exceed the scope defined in this application, they should all fall within the protection scope of this application.

Claims

1. An integrated waste heat recovery heat exchange system, characterized by, The application relates to a waste heat recovery system for a blast furnace ironmaking process. The application comprises: an analysis module for analyzing high-temperature blast furnace slag and blast furnace gas generated in a blast furnace ironmaking process, and judging whether the high-temperature blast furnace slag and the blast furnace gas generated in the blast furnace ironmaking process can be subjected to waste heat recovery; a waste heat recovery module for recovering waste heat from the high-temperature blast furnace slag and the blast furnace gas when it is judged that the high-temperature blast furnace slag and the blast furnace gas can be subjected to waste heat recovery, and for secondarily utilizing the recovered heat from the high-temperature blast furnace slag and the blast furnace gas; 2. The integrated waste heat recovery heat exchange system of claim 1, wherein, a waste material treatment module for treating the high-temperature blast furnace slag and the blast furnace gas of a waste material treatment system. The high-temperature blast furnace slag and the blast furnace gas generated in the blast furnace ironmaking process are analyzed, and it is judged whether the high-temperature blast furnace slag and the blast furnace gas generated in the blast furnace ironmaking process can be subjected to waste heat recovery, and the high-temperature blast furnace slag and the blast furnace gas are treated accordingly. The specific analysis process is as follows: The component information of the high-temperature blast furnace slag and the component information of the blast furnace gas are obtained, the content of corrosive substances and the content of low-flow substances in the high-temperature blast furnace slag are obtained based on the component information of the high-temperature blast furnace slag, the total content of the high-temperature blast furnace slag is obtained by adding the content of the strong corrosive substances and the content of the low-flow substances in the high-temperature blast furnace slag, and the total content of the blast furnace gas is obtained by adding the dust content and the gas moisture content in the blast furnace gas based on the component information of the blast furnace gas. The total content of the high-temperature blast furnace slag is compared with the set total content threshold of the high-temperature blast furnace slag, when the total content of the high-temperature blast furnace slag is greater than the set total content threshold of the high-temperature blast furnace slag, it is judged that the high-temperature blast furnace slag cannot be subjected to waste heat recovery, and the high-temperature blast furnace slag is transmitted to the waste material treatment system, otherwise it is judged that the high-temperature blast furnace slag can be subjected to waste heat recovery, and the high-temperature blast furnace slag is transmitted to the waste heat recovery system.

3. The integrated waste heat recovery heat exchange system of claim 2, wherein, Similarly, the total content of the blast furnace gas is compared with the set total content threshold of the blast furnace gas, when the total content of the blast furnace gas is greater than the set total content threshold of the blast furnace gas, it is judged that the blast furnace gas cannot be subjected to waste heat recovery, and the blast furnace gas is transmitted to the waste material treatment system, otherwise it is judged that the blast furnace gas can be subjected to waste heat recovery, and the blast furnace gas is transmitted to the waste heat recovery system. The component information of the high-temperature blast furnace slag and the component information of the blast furnace gas are obtained, and the specific process is as follows: After the blast furnace ironmaking is completed, the detection system collects a high-temperature blast furnace slag sample of any quantity, first grinds the high-temperature blast furnace slag sample, and then scans the high-temperature blast furnace slag sample by using an XRD instrument, so as to obtain the X-ray diffraction patterns of each substance in the high-temperature blast furnace slag sample, compares the X-ray diffraction patterns of each substance with a standard diffraction pattern library, so as to obtain each substance in the blast furnace slag sample, and compares the intensity of the diffraction peak of each substance with the intensity of the corresponding content standard curve, so as to obtain the content of each substance. In the process of blast furnace ironmaking, the probe of the light scattering dust instrument is connected to the blast furnace gas pipeline, and after the blast furnace ironmaking is completed, the light scattering dust instrument is started to directly measure the dust content in the blast furnace gas. At the same time, a humidity sensor is installed at the port of the blast furnace gas pipeline to determine the moisture content of the blast furnace gas.

4. The integrated waste heat recovery heat exchange system of claim 3, wherein The waste heat of the high-temperature slag and the blast furnace gas is recovered, and the specific process is as follows: First, the high-temperature slag is subjected to primary heat exchange through the integrated waste heat exchanger, and the recovered heat is transmitted to the blast furnace ironmaking air pipe port for blast furnace ironmaking. Then, the high-temperature slag after primary heat exchange is subjected to secondary heat exchange, and the blast furnace gas is also subjected to heat exchange. The heat recovered after secondary heat exchange of the high-temperature slag and heat exchange of the blast furnace gas is stored in the storage tank.

5. The integrated waste heat recovery heat exchange system of claim 4, wherein, The high-temperature slag is subjected to primary heat exchange through the integrated waste heat exchanger in the factory area, and the specific process is as follows: The high-temperature slag generated by blast furnace ironmaking is transported to the feed inlet of the air-cooled heat exchange system by the conveying device. From the feed inlet to the heat exchange chamber, a distribution device is installed in the heat exchange chamber to evenly distribute the high-temperature slag in the heat exchange chamber. At this time, the guide vane is opened, and the airflow enters the heat exchange chamber and flows through the slag layer. Accordingly, the waste heat of the high-temperature slag is recovered. At the same time, the temperature of the high-temperature slag in the heat exchange chamber is monitored in real time by the temperature sensor in the heat exchange chamber. When the temperature of the high-temperature slag reaches the first heat exchange temperature threshold, the high-temperature slag is discharged from the discharge port of the heat exchange chamber and sent to the feed inlet of the liquid-cooled heat exchange system by the conveying device.

6. The integrated waste heat recovery heat exchange system of claim 5, wherein, The high-temperature slag after primary heat exchange is subjected to secondary heat exchange, and the blast furnace gas is also subjected to heat exchange, and the specific process is as follows: The high-temperature slag is transported to the feed inlet of the liquid-cooled heat exchange system by the conveying device. Then, the circulating pump is started to circulate the liquid medium in the heat exchanger on the wall of the heat exchange chamber. After ensuring that the heat exchanger is filled with liquid, the feed inlet valve of the liquid-cooled heat exchange system is opened, and the high-temperature slag enters the heat exchange chamber. During the heat exchange process, the high-temperature slag in the heat exchange chamber is stirred. At the same time, the temperature of the high-temperature slag is monitored in real time by the temperature sensor in the heat exchange chamber. When the temperature of the high-temperature slag reaches the second heat exchange temperature threshold, the high-temperature slag is discharged from the discharge port of the heat exchange chamber and sent to the waste treatment system of the heat exchange system by the conveying device. Similarly, the blast furnace gas is transported to the liquid-cooled heat exchange pipeline for waste heat recovery. Similarly, the blast furnace gas is subjected to heat exchange in the same way as the high-temperature slag is subjected to secondary heat exchange.

7. The integrated waste heat recovery heat exchange system of claim 6, wherein, The heat recovered from the high-temperature slag and the high-temperature gas is subjected to secondary utilization, and the specific process is as follows: The hot gas stream obtained after primary heat exchange of the high-temperature slag is transmitted to the blast furnace ironmaking air pipe port through the air heat pipeline, thereby realizing heat supply for blast furnace ironmaking, and determining whether the total heat recovered after primary heat exchange of the high-temperature slag meets the current heat supply demand of blast furnace ironmaking. The liquid medium obtained after secondary heat exchange of the high-temperature slag and heat exchange of the blast furnace gas is stored in the liquid storage tank, and the heat of the liquid medium stored in the liquid storage tank is adjusted and controlled.

8. The integrated waste heat recovery heat exchange system of claim 7, wherein, The judgment high temperature furnace slag once heat recovery total heat whether meets the current blast furnace ironmaking heat supply demand quantity, specific process as follows: From the data center to obtain the history of each blast furnace ironmaking total heat consumption, according to the history of each blast furnace ironmaking total heat consumption forecast current blast furnace ironmaking heat supply demand quantity, high temperature furnace slag once heat recovery total heat and forecast current blast furnace ironmaking heat supply demand quantity are compared, when high temperature furnace slag once heat recovery total heat is greater than or equal to forecast current blast furnace ironmaking heat supply demand quantity, then judge high temperature furnace slag once heat recovery total heat meets the current blast furnace ironmaking heat supply demand quantity, and use the way to blast furnace ironmaking for heating; When high temperature furnace slag once heat recovery total heat is less than forecast current blast furnace ironmaking heat supply demand quantity, then judge high temperature furnace slag once heat recovery total heat meets the current blast furnace ironmaking heat supply demand quantity, at this time need to assist blast furnace ironmaking process heating.

9. The integrated waste heat recovery heat exchange system of claim 8, wherein, The heat of the liquid medium stored in the liquid storage tank is adjusted and controlled, and the specific process is as follows: The total heat of the liquid medium obtained by high temperature furnace slag secondary heat exchange and blast furnace gas heat exchange and the total heat of the original liquid medium in the liquid storage tank are obtained, and the total heat of the liquid medium obtained by high temperature furnace slag secondary heat exchange and blast furnace gas heat exchange and the total heat of the original liquid medium in the liquid storage tank are added to obtain the total heat of the existing liquid medium in the liquid storage tank. The total heat of the existing liquid medium in the liquid storage tank is compared with the set total heat storage standard value interval of the liquid storage tank, if the total heat of the existing liquid medium in the liquid storage tank is less than the lower limit value of the set total heat storage standard value interval of the liquid storage tank, the buzzer alarm is triggered, and the heat stored in the liquid storage tank is stopped for plant equipment work, if the total heat of the existing liquid medium in the liquid storage tank is greater than the upper limit value of the set total heat storage standard value interval of the liquid storage tank, the heat stored in the liquid storage tank is used for plant equipment work.

10. The integrated waste heat recovery heat exchange system of claim 9, wherein, The high temperature furnace slag and blast furnace gas of the waste treatment module are treated, and the specific process is as follows: The waste high temperature furnace slag is treated by water quenching, the slag generated in the treatment process is recycled as industrial production admixture, and the steam generated in the treatment process is recovered as waste heat; The waste blast furnace gas is treated by dust removal, desulfurization, deamination and dehydration, and is used as fuel to heat the boiler and heating furnace equipment.

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