CN216245583U

CN216245583U - Liquid fuel concurrent heating coupling hot air sintering device

Info

Publication number: CN216245583U
Application number: CN202122150089.8U
Authority: CN
Inventors: 王业峰; 周浩宇
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-04-08
Anticipated expiration: 2031-09-07

Abstract

A liquid fuel heat-supplementing coupling hot air sintering device comprises a sintering machine trolley and a heat-supplementing coupling device; the heat supplementing coupling device comprises a hot air cover and a liquid fuel injection device; the hot air cover is arranged at the upper part of the sintering machine trolley; the liquid fuel injection device comprises a liquid fuel main pipe and a liquid fuel branch pipe; the liquid fuel main pipe is arranged on the outer side of the hot air hood and is positioned above the sintering machine trolley; one end of the liquid fuel branch pipe is connected with the liquid fuel main pipe, the other end of the liquid fuel branch pipe extends into the hot air cover, and a fuel nozzle is arranged at one end extending into the hot air cover; the hot air hood is also provided with a heat medium pipeline which is communicated with the inner space of the hot air hood. The device capable of spraying the liquid fuel in a rotating mode is adopted, the liquid fuel can be uniformly sprayed onto the surface of the sintering material according to the process requirement, the device is simple in structure, a pressurizing device does not need to be additionally arranged on a pipeline, and the technical and safety problems caused by the pressurizing device are avoided.

Description

Liquid fuel concurrent heating coupling hot air sintering device

Technical Field

The utility model relates to a fuel heat-supplementing sintering device, in particular to a liquid fuel heat-supplementing coupling hot air sintering device, and belongs to the technical field of sintering.

Background

As a key link in the iron-making process in the iron and steel industry, the sintering process mainly has the main functions of mixing various powdery iron-containing raw materials with proper amount of fuel and flux, adding proper amount of water, mixing and pelletizing, enabling the materials to generate a series of physical and chemical changes on sintering equipment, sintering the materials into blocks, and conveying the blocks to a blast furnace for the next working procedure. How to effectively reduce the solid fuel dosage of the sintering process and reduce CO generated in the generation process has been₂The energy-saving and emission-reducing effects are achieved, and the method is a problem which is always concerned and concerned by technical personnel in the steel industry.

After the pulverized coal of the upper material layer is ignited in the sintering process, the combustion heat release is not only used for sintering the nearby raw materials, but also the self-heat storage effect in the air draft type operation production enables the upper heat to be brought into the lower material layer by gas to participate in the sintering of the lower material layer. Therefore, the heat required by the material layers from top to bottom is gradually reduced, segregation material distribution is adopted during material distribution, the coal powder distribution amount on the upper material layer is large, and the coal powder distribution amount on the lower material layer is small, so that the quality index of a finished product can be greatly improved under the same fuel consumption index, or the fuel consumption index can be greatly reduced under the same finished product quality index, and the purposes of saving energy and reducing carbon emission are achieved.

However, due to the limitation of the device technology, in the current sintering plant, in the actual industrial production, the strict ideal layered segregation type fuel distribution is difficult to realize, and the owner has to allocate the solid fuel according to the high value of the theoretical required fuel quantity in each layer. The problem that the upper material layer heat is insufficient and the middle and lower material layers are excessive can be caused in the sintering material layer during sintering production, the lower sintering material is easy to melt, and the like, so that energy and resource waste is finally caused, and the generation of smoke pollutants is greatly intensified.

Patent CN200980148879.1 proposes a method for supplying heat to the sinter bed by using liquid fuel. Atomizing specific liquid fuelsAnd the liquid is sprayed in a region which is a distance away from the ignition furnace after reaching the required size (below 100 mu m), small liquid particles volatilize on the surface of the material layer and enter the material layer along with sintering air draft, and the liquid is combusted in the sintering material layer to supply heat, so that the width of a high-temperature belt of the sintering material layer during production is widened, the temperature time of the sintering ore at 1200-1400 ℃ is prolonged, and the strength of the sintering ore and the proportion of the sintering ore at 5-10 mm can be improved. Meanwhile, when the liquid fuel is used for supplementing the missing heat at the upper part of the material layer, the solid fuel proportion of the material layer needs to be reduced integrally to prevent the excessive heat of the material layer at the lower part, so that the use amount of solid carbon and CO in the production of sintered ore can be reduced₂And (4) discharging the amount.

Based on this, the prior art liquid fuel injection process and apparatus still have some problems:

1. liquid fuels are difficult to settle after atomization to a particular size. Patent CN200980148879.1 teaches that the fuel needs to be atomized to below 100 μm, and the contact specific surface area of the liquid fuel particles and air is increased to ensure that the fuel can be volatilized in time and carried into the material layer. However, the liquid particles below 100 μm are hindered from falling freely due to the non-negligible air buoyancy when they settle, and are difficult to completely and rapidly settle to the surface of the sintering material layer only due to the gravity and the micro negative pressure on the surface of the sintering material layer, and are also susceptible to the influence of unstable air flow, dust generated on the sintering material surface, and the like, and the failure of timely settling of fuel droplets easily causes the untimely heat compensation inside the material layer, which affects the quality of the sintered ore, and is also one of the potential safety hazards.

2. Liquid fuel atomizers are prone to clogging. The requirement on an atomization component for atomizing the liquid fuel to be below 100 mu m is particularly high, the atomization component needs to uniformly and unimpededly spray the fuel to the surface of a sintering material layer while ensuring the qualified particle size of the sprayed liquid fuel, in the actual operation process, dust, instability and the like in a production workshop bring great difficulty to fuel atomization, and meanwhile, the aperture of an atomization device is extremely small, the blockage probability is high, and the smooth operation of equipment is influenced. The liquid fuel is only evaporated freely, the evaporation speed is difficult to control, and residues are easy to form.

3. Synchronous spraying on the surface of liquid fuelFire extinguishing gas (nitrogen, steam and the like) is blown, and the fire extinguishing gas can deteriorate the combustion environment of the solid fuel and influence the sintering speed and the quality index. In the prior art, in order to prevent liquid fuel sprayed on the surface of a sintering material layer from igniting on the surface of the material layer, fire extinguishing gas needs to be sprayed on the surface of the material layer, the fire extinguishing gas can enter the material layer along with sintering air draft, and combustion improver O in gas in the material layer is reduced₂The concentration of the solid fuel (coal powder and coke) reduces the burning speed of the solid fuel, reduces the downward moving speed of a burning zone in sintering, prolongs the sintering time and leads to the reduction of the yield of a sintering machine; meanwhile, the reduction of the combustion speed of the solid fuel can influence the internal temperature distribution of a sinter bed, the peak temperature is reduced, and the reduction of the quality of sinter due to the over-low peak temperature and insufficient sintering liquid phase is easy to occur. The liquid fuel is volatilized to enter the material layer for combustion, and the position of the liquid fuel is above the solid fuel combustion zone, so that oxygen in gas in a part of sintering material layers can be consumed, the condition of robbing oxygen required by the combustion of the solid fuel is formed, and the combustion environment of the solid fuel is further deteriorated.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a liquid fuel concurrent heating coupling hot air sintering device. The utility model aims to solve the problems of difficult atomization, untimely volatilization, deterioration of an original sintering zone and the like in the liquid fuel auxiliary sintering process, obtain a better fuel supplement effect and realize the emission reduction and quality improvement effects of sintering production.

The device is provided with a hot air cover on a sintering machine trolley, and the hot air cover is provided with a liquid fuel injection device and a heat medium pipeline. The liquid fuel is uniformly sprayed onto the sintering material surface by the liquid fuel spraying device, meanwhile, a heat medium (such as hot air in processes of a circular cooler and the like) is introduced into the hot air hood through the hot medium pipeline, the sprayed liquid fuel is heated and vaporized by the heat medium, vaporized liquid fuel steam is mixed with the heat medium and enters the sintering material layer to be combusted and released heat, and heat required by sintering of the upper material layer is supplemented. The device has simple structure, can realize the uniform injection of the liquid fuel on the sintering charge level, simultaneously adopts hot air from the processes of a circular cooler and the like to heat and vaporize the liquid fuel injected on the sintering charge level, ensures the timely evaporation of the liquid fuel, further ensures the timely supplement of the liquid fuel to the heat in the material layer, and realizes multiple effects of utilizing waste heat, improving the quality of sintered ores, reducing the consumption of solid fuel and the like.

According to the embodiment of the utility model, a liquid fuel concurrent heating coupling hot air sintering device is provided.

A liquid fuel heat-supplementing coupling hot air sintering device comprises a sintering machine trolley and a heat-supplementing coupling device. The heat supplementing coupling device comprises a hot air cover, a liquid fuel injection device and a heat medium pipeline. The hot air cover is arranged at the upper part of the sintering machine trolley. The liquid fuel injection device comprises a liquid fuel main pipe and a liquid fuel branch pipe. The liquid fuel main pipe is arranged on the outer side of the hot air hood and is positioned above the sintering machine trolley. One end of the liquid fuel branch pipe is connected with the liquid fuel main pipe, the other end of the liquid fuel branch pipe extends into the hot air cover, and a fuel nozzle is arranged at one end extending into the hot air cover. The heat medium pipeline is arranged on the hot air hood and communicated with the inner space of the hot air hood.

In the present invention, the liquid fuel injection device further includes a liquid fuel pool. The liquid fuel pool is arranged in the hot air cover. One end of the liquid fuel branch pipe, which is provided with the fuel nozzle, is connected with the liquid fuel pool, and the liquid fuel branch pipe extends into or leads to the liquid fuel pool. The bottom of the liquid fuel pool is provided with a fuel injection hole.

Preferably, the side wall of the liquid fuel pool is also provided with fuel injection holes. Preferably, the side walls of the liquid fuel branch pipes extending into the liquid fuel pool are simultaneously provided with fuel circulation holes.

Preferably, the liquid fuel injection device further includes a driving device. The driving device is arranged on the liquid fuel pool and drives the liquid fuel pool to rotate around the liquid fuel branch pipe. Preferably, the connection position of the liquid fuel branch pipe and the liquid fuel pool is located on the central axis of the liquid fuel pool.

Preferably, the liquid fuel injection device further includes a separator provided in the liquid fuel pool. The baffle plate is positioned between the outer wall of the liquid fuel branch pipe and the inner wall of the liquid fuel pool, and the baffle plate is connected with the bottom of the liquid fuel pool. The partition plate divides an inner space of the liquid fuel pool into a plurality of regions.

Preferably, the height of the partition plate is smaller than the height of the liquid fuel pool. Preferably, the ratio of the height of the partition plate to the height of the liquid fuel pool is 0.1 to 0.9: 1, preferably 0.2 to 0.8: 1, more preferably 0.3 to 0.6: 1.

in the utility model, the number of the partition plates is n, and the n partition plates are uniformly distributed in a radial shape along the peripheral direction of the liquid fuel pool by taking the liquid fuel branch pipe as the center. The n partition plates divide the inner space of the liquid fuel pool into n areas uniformly, and a plurality of fuel injection holes which are distributed uniformly are arranged at the bottom and on the side wall of the liquid fuel pool corresponding to each area.

Preferably, 2. ltoreq. n.ltoreq.30, preferably 3. ltoreq. n.ltoreq.20, more preferably 4. ltoreq. n.ltoreq.15.

In the utility model, 1-100 liquid fuel branch pipes are connected to the liquid fuel main pipe, preferably 2-80 liquid fuel branch pipes, and more preferably 3-50 liquid fuel branch pipes. Preferably, the spacing between each two adjacent liquid fuel branch pipes is equal. Each liquid fuel branch pipe is provided with a fuel nozzle. One end of each liquid fuel branch pipe, which is provided with a fuel nozzle, is connected with a liquid fuel pool. And each liquid fuel pool is correspondingly provided with a driving device.

In the present invention, the apparatus further comprises a first temperature detection means. The first temperature detection device is arranged on the hot air cover and extends into the hot air cover. Preferably, the first temperature detecting device is arranged at the lower part of the hot air hood, namely at the position close to the sintering charge level on the hot air hood.

Preferably, a plurality of first temperature detection devices are uniformly arranged at the lower part of the hot air cover. Preferably, the first temperature detection device is a thermocouple.

Preferably, the heat medium pipe is provided with a second temperature detection device. Preferably, the heat medium pipeline is also provided with a flow valve.

Preferably, the liquid fuel manifold is provided with a third temperature detection device.

In the present invention, the device comprises a plurality of said complementary thermal coupling means. Along the running direction of the sintering machine trolley, the plurality of heat supplementing coupling devices are sequentially arranged above the sintering machine trolley, and the heat supplementing coupling devices are tightly arranged.

Preferably, the number of said complementary thermal coupling means is between 1 and 20, preferably between 2 and 10, more preferably between 3 and 8.

The utility model provides a liquid fuel concurrent heating coupling hot air sintering device. The device comprises a sintering machine trolley and a heat supplementing coupling device. The heat supplementing coupling device comprises a hot air cover, a liquid fuel injection device and a heat medium pipeline. The hot air hood is arranged at the upper part of the sintering pallet and is positioned at the downstream of the ignition device (along the running direction of the sintering pallet). The liquid fuel injection device is arranged on the hot air cover. The liquid fuel injection device comprises a liquid fuel main pipe and a liquid fuel branch pipe. The liquid fuel main pipe is arranged on the outer side of the hot air cover, one end of the liquid fuel branch pipe is connected with the liquid fuel main pipe, the other end of the liquid fuel branch pipe extends into the hot air cover, and a fuel nozzle is arranged at the end extending into the hot air cover. The hot medium pipeline is arranged on the hot air hood, extends into or leads to the hot air hood, namely the hot medium pipeline is communicated with the inner space of the hot air hood. When the device is operated, liquid fuel is injected on the sinter mixture level in the sintering machine trolley from a fuel nozzle at one end of the liquid fuel branch pipe through a liquid fuel main pipe and the liquid fuel branch pipe of the liquid fuel injection device. Meanwhile, a heat medium (such as hot air from a circular cooler) with the temperature matched with the boiling point of the injected liquid fuel is introduced into the hot air hood through a heat medium pipeline, and the heat medium heats and vaporizes the liquid fuel injected on the sintering charge surface to form liquid fuel vapor. The mixed gas of the liquid fuel steam and the heat medium (namely the heat medium which exchanges heat with the liquid fuel and is cooled) enters the sintering material layer to be combusted and supplied with heat under the action of the air draft negative pressure, so that the heat required by sintering of the upper material layer is supplemented, and the sintering is assisted. The utility model adopts hot air from processes of a circular cooler and the like to heat and vaporize the liquid fuel sprayed on the sintering charge level, the hot air introduced into the hot air cover heats the liquid fuel sprayed on the sintering charge level, the vaporization of the liquid fuel is promoted, and the temperature of the hot air is matched with the boiling point of the sprayed liquid fuel, namely the introduction of the hot air enables the evaporation and the boiling of the liquid fuel to be carried out simultaneously, thereby further accelerating the vaporization speed.

Preferably, the liquid fuel injection device of the present invention further includes a liquid fuel pool. The liquid fuel pool is arranged in the hot air cover and is positioned at the lower part of one end of the liquid fuel branch pipe, which is provided with the fuel nozzle. The liquid fuel manifold extends into or opens into the liquid fuel pool and is connected to the liquid fuel pool (e.g., via a bearing). The bottom (namely the bottom wall) of the liquid fuel pool is uniformly provided with a plurality of fuel injection holes. When the device is operated, liquid fuel flows in from the liquid fuel main pipe, passes through the liquid fuel branch pipe, flows into the liquid fuel pool from the fuel nozzle at the end part of the liquid fuel branch pipe, and the liquid fuel entering the liquid fuel pool is uniformly sprayed to the sintering charge surface from the fuel spray hole at the bottom under the action of gravity, so that the heat supplement requirement of the charge layer is met. Preferably, the side wall of the liquid fuel pool is also provided with a plurality of fuel injection holes which are uniformly distributed. Correspondingly, the side wall of the liquid fuel branch pipe extending into the liquid fuel pool is synchronously provided with fuel circulation holes. The liquid fuel can flow into the liquid fuel pool through the fuel nozzle at the end part and the fuel flow through hole at the side part, and the liquid fuel entering the liquid fuel pool can be uniformly sprayed onto the sintering material surface from the fuel spray hole at the bottom part and can also be uniformly sprayed from the fuel spray hole on the side wall.

Further preferably, the liquid fuel pool is further provided with a driving device. The liquid fuel pool is connected with the liquid fuel branch pipe (through a bearing), and under the driving of the driving device, the liquid fuel pool rotates around the liquid fuel branch pipe at a certain speed, so that part of liquid fuel in the liquid fuel pool is uniformly sprayed out from the fuel spray holes at the bottom under the action of gravity, and meanwhile, the liquid fuel can also uniformly pass through the fuel spray holes in the side wall at a certain speed under the action of centrifugal force, thereby ensuring that the liquid fuel sprayed out from the liquid fuel pool can be uniformly sprayed to a sintering material surface and radiated to a larger range. In the present invention, in order to further promote the uniform injection of the liquid fuel, the connection position of the liquid fuel branch pipe and the liquid fuel pool is located on the central axis of the liquid fuel pool.

The liquid fuel injection apparatus further includes a separator disposed within the liquid fuel cell. The baffle plate is positioned between the outer wall of the liquid fuel branch pipe and the inner wall of the liquid fuel pool, and the baffle plate is connected with the bottom (namely the bottom wall) of the liquid fuel pool. The partition plate divides an inner space of the liquid fuel pool into a plurality of regions. In the utility model, the height of the partition plate is less than that of the liquid fuel pool, when the liquid fuel pool rotates along with the driving device, a part of liquid fuel can be limited between the two partition plates, so that enough tangential force is provided for the liquid fuel, and the rotating speed of the liquid fuel is increased, so that the liquid fuel can pass through the fuel injection hole on the side wall of the liquid fuel pool at a certain speed under the action of centrifugal force. Generally, the ratio of the height of the partition plate to the height of the liquid fuel pool is 0.1 to 0.9: 1, preferably 0.2 to 0.8: 1, more preferably 0.3 to 0.6: 1, for example, the height of the partition is 1/3 the height of the liquid fuel pool. In addition, the number of the partition plates is not limited, for example, the number n of the partition plates can be in a range of 2 to 30, preferably 3 to 20, and more preferably 4 to 15. The n partition plates are radially and uniformly distributed along the peripheral direction of the liquid fuel pool by taking the liquid fuel branch pipe as the center, so that the n partition plates uniformly divide the inner space of the liquid fuel pool into n areas. The shape of the liquid fuel pool is not limited, and when the liquid fuel pool is circular, the n partition plates uniformly divide the inner space of the liquid fuel pool into n sectors. And a plurality of fuel injection holes which are uniformly distributed are arranged at the bottom and the side wall of the liquid fuel pool corresponding to each area. The arrangement of the fuel injection holes in the corresponding areas is not limited, and the uniform distribution is met, so that the uniform injection of the liquid fuel can be realized. For example, a plurality of fuel injection holes are arranged in a straight line at equal intervals on the bottom and the side wall in each region of the liquid fuel pool.

In the utility model, a plurality of liquid fuel branch pipes are connected to the liquid fuel main pipe. Preferably, the distance between every two adjacent liquid fuel branch pipes is equal, and the liquid fuel branch pipes are arranged on the sintering charge surface at equal intervals so that the liquid fuel is sprayed on the sintering charge surface more uniformly. Each liquid fuel injection pipe is provided with a fuel nozzle. Each liquid fuel branch pipe is connected with a liquid fuel pool, and each liquid fuel pool is correspondingly provided with a driving device. As shown in fig. 3, since the liquid fuel injected from each liquid fuel pool has a certain initial velocity by the centrifugal force from the fuel injection holes formed in the side wall of the liquid fuel pool, the liquid fuel can be injected to a certain region of the upper part of the frit layer. The particle size of the injected liquid fuel particles and the rotating speed of the liquid fuel pool can be optimally adjusted by combining the technological requirement of the fuel, the width of the sintering charge surface, the size of the fuel injection holes, the number of the liquid fuel pools and the like, and the injection range of each liquid fuel pool on the sintering charge surface is further adjusted, so that the liquid fuel can be uniformly injected to the sintering charge surface according to the technological requirement, and the heat supplement requirement is met.

The utility model introduces a heat medium (namely, external heat) to heat and vaporize the liquid fuel sprayed on the sintering charge level, and can ensure the timely evaporation of the liquid fuel, so that the device only needs to control the granularity of liquid fuel particles to be in a millimeter level. Can guarantee like this that liquid fuel can evenly spray, can guarantee again that the liquid fuel granule can not in time subside because of the buoyancy of air, the liquid fuel granule that erupts simultaneously has certain initial velocity, and the interference killing feature is strong, and the security is high, is favorable to improving solid fuel combustion environment, improves the output quality index of sintering deposit.

In the utility model, a liquid fuel injection section is arranged on the sintering machine trolley, and a heat compensation coupling device is arranged on the liquid fuel injection section. Preferably, the liquid fuel injection section is sequentially divided into a plurality of fuel injection sections along the traveling direction of the sintering machine pallet. The heat-supplementing coupling devices are arranged on the fuel injection sections, namely the device comprises a plurality of heat-supplementing coupling devices. The plurality of heat-supplementing coupling devices are sequentially arranged above the sintering machine trolley, and the heat-supplementing coupling devices are tightly arranged. When the number of the heat-supplementing coupling devices is multiple, according to the difference of the heat required by the sintering material layer at the corresponding position of each fuel injection section, each heat-supplementing coupling device respectively injects different types of liquid fuels to the sintering mixture material surface at the corresponding position of each fuel injection section according to the requirement, introduces a heat medium (such as hot air in the processes of a circular cooler and the like) with the temperature matched with the boiling point of the injected liquid fuel, heats and vaporizes the injected liquid fuel through the heat medium to form liquid fuel steam, mixes the vaporized liquid fuel steam with the heat medium, enters the sintering material layer in each fuel injection section, burns and releases the heat, and further supplements the heat required by sintering of the upper material layer. Because of the self-heat-storage effect of the material layer in the air draft sintering process, the heat provided by the liquid fuel needed by the sintering material layer at the corresponding position of each fuel injection section is gradually reduced along the running direction of the sintering machine trolley. Meanwhile, in the sintering process, an ignition burner in an ignition furnace ignites the sintering charge level to ignite the solid carbon fuel on the surface of the sintering charge level to form an early-stage combustion zone; after the sintering charge level is moved out of the ignition furnace, it is cooled by ambient air, so that the closer the sintering charge level is located to the ignition furnace, the higher its temperature. Based on this, in view of many-sided factors such as safe production and utilization charge level self sensible heat, in utility model, along the traffic direction of sintering machine platform truck, each concurrent heating coupling device corresponds the boiling point of the liquid fuel that sprays and reduces in proper order, and correspondingly, each concurrent heating coupling device corresponds the temperature of the hot medium that lets in and reduces in proper order. Because the heat supplementing coupling device is arranged on the sintering machine and is positioned at the downstream of the ignition furnace, namely the boiling point of the liquid fuel injected by the heat supplementing coupling device close to the ignition furnace end is higher than that of the liquid fuel injected far away from the ignition furnace end, the temperature of the heat medium introduced by the heat supplementing coupling device close to the ignition furnace end is higher than that of the heat medium introduced far away from the ignition furnace end. In actual production, the utility model can reasonably allocate the number, the length and the like of the heat compensation coupling devices according to the types of the liquid fuels and the distribution of the hot air temperature sections on site, thereby realizing the technical effect of composite heat compensation of a plurality of liquid fuels, and simultaneously, hot air with different temperatures can be utilized in a cascade manner, particularly hot air with lower temperature and difficult sensible heat recovery can also be reasonably utilized. The utility model realizes waste heat utilization of hot waste gas in processes of steel plant circular coolers and the like so as to obtain better liquid fuel heat supplementing effect and further realize emission reduction and quality improvement effect of sintering production.

During the production process, the number of the fuel injection sections and the number of the heat compensation coupling devices are determined according to the type of the liquid fuel, the temperature of hot air and the like available on site, for example, the number of the heat compensation coupling devices is 1 to 20, preferably 2 to 10, and more preferably 3 to 8 (for example, the number of the heat compensation coupling devices is 4). Liquid fuels can be selectively recycled and refined by waste oil, the boiling point of the liquid fuels is 300-350 ℃, the ignition point is generally above 500 ℃, hot air above 300 ℃ can be input in a matching manner, and the liquid fuels are generally sprayed by a heat-supplementing coupling device close to an ignition furnace; the boiling point of liquid fuel such as aviation kerosene is generally in the range of 150-280 ℃, the spontaneous combustion temperature is above 400 ℃, hot air input at 250-300 ℃ can be matched, and the liquid fuel can be arranged behind a biodiesel input section; the liquid fuel can be selected from gasoline, alcohol and alkane liquid fuel, the boiling point is generally low, the liquid fuel can be completely evaporated at normal temperature or 100 ℃, and the liquid fuel can be supplemented with hot air with low temperature (about 150 ℃) when being input; and then the matching of the boiling point of the liquid fuel and the temperature of the hot air is realized, the technical effect of composite heat compensation of various liquid fuels is achieved, and the cascade utilization of the hot air in different temperature sections is realized.

In the present invention, the temperature in the hot air hood of each thermal compensation coupling device needs to be controlled within a reasonable temperature range, and is set as a target temperature value. When the actual temperature in the hot air cover is lower than the target temperature value, namely the temperature in the hot air cover is lower, the problems of fuel waste and insufficient sintering heat compensation are easily caused due to untimely evaporation and vaporization of the liquid fuel; when the actual temperature in the hot air cover is higher than the target temperature, the hot air cover has high temperature abnormity, and the fire danger is caused. Therefore, the hot air cover of each heat compensation coupling device is respectively provided with a plurality of first temperature detection devices which are uniformly distributed, the plurality of first temperature detection devices detect the temperature of each area in the hot air cover in real time, and when the actual temperature in the hot air cover deviates from the target temperature value, corresponding measures are immediately taken for adjustment. Because real-time monitoring and temperature regulation are timely, the conditions that large temperature abnormity (such as high temperature abnormity to fire) occurs in the hot air cover are less, and the safety and the reliability of the liquid fuel concurrent heating coupling hot air sintering device are further ensured. Based on the method, the fire extinguishing gas is not required to be sprayed on the sintering charge surface to ensure the production safety, so that the problems that the fire extinguishing gas deteriorates the solid fuel combustion environment and reduces the quality index of the sintered mineral product caused by spraying the fire extinguishing gas in the prior art are solved.

In the present invention, the type of the liquid fuel injected to the sintering charge level is not limited, and the liquid fuel may be a mixed fuel composed of a plurality of liquid fuels, such as biodiesel, aviation kerosene, gasoline, alcohol liquid fuel, and alkane liquid fuel. The boiling point of the liquid fuel is 15-500 ℃, preferably 25-480 ℃, and more preferably 50-450 ℃. Correspondingly, the initial temperature of the heat medium introduced into the hot air hood is matched with the boiling point of the liquid fuel, for example, the initial temperature of the heat medium is 100-550 ℃, preferably 120-500 ℃, and more preferably 150-480 ℃. The type or source of the heat medium is not limited, and the purpose of the concurrent heating coupled sintering according to the present invention can be achieved by using a liquid fuel, and the heat medium is, for example, hot air from a steel plant circular cooler process.

In the present application, the width of the pallet of the sintering machine is generally 0.5 to 15m, preferably 1 to 13m, preferably 2 to 12m, more preferably 3 to 10m, preferably 4 to 9m, and further preferably 5 to 8 m.

In the present application, the length of the sintering machine is generally 2 to 300m, preferably 3 to 200m, preferably 5 to 180m, more preferably 8 to 150m, preferably 10 to 120m, and further preferably 15 to 100 m.

Compared with the prior art, the utility model has the following beneficial technical effects:

1. the device capable of spraying the liquid fuel in a rotating mode is adopted, the liquid fuel can be uniformly sprayed onto the surface of the sintering material according to the process requirement, the device is simple in structure, a pressurizing device does not need to be additionally arranged on a pipeline, and the technical and safety problems caused by the pressurizing device are avoided.

2. The utility model adopts hot air from processes such as a circular cooler and the like to heat and vaporize the liquid fuel sprayed on the surface of the sintering material, can ensure that the liquid fuel is evaporated in time and enters the material layer to be combusted, and can not remain due to untimely evaporation, thereby ensuring that the liquid fuel can supplement the heat in the material layer in time.

3. The utility model introduces hot air from processes of a circular cooler and the like into sintering, not only can play a role of heating vaporized liquid fuel, but also can improve the upper sintering temperature, increase the sintering liquid phase and be beneficial to full crystallization of minerals, and reduce the content of glass phase, thereby improving the yield of the whole sintering and the strength of sintered ore. The hot air replaces cold air, so that the temperature difference between the pumped air and the hot sintering layer is reduced, the cooling speed is reduced, the thermal stress is reduced, and the strength of the sintered ore is improved. The hot air sintering is coupled with the liquid fuel heat supplement, the liquid fuel is evaporated by utilizing the sensible heat of the hot air, and multiple effects of utilizing waste heat, improving the quality of sintered ore, reducing the consumption of solid fuel and the like are realized.

4. The granularity of the liquid fuel particles sprayed by the utility model is only controlled at millimeter level, so that the liquid fuel can be uniformly sprayed, the liquid fuel particles can not settle in time due to the buoyancy of air, and the sprayed liquid fuel particles have certain initial speed, strong anti-interference capability and high safety; therefore, fire extinguishing gas does not need to be sprayed on the sintering charge level to ensure production safety, thereby avoiding the problems that the fire extinguishing gas is caused by spraying the fire extinguishing gas to deteriorate the solid fuel combustion environment and reduce the quality index of sintered minerals in the prior art.

5. The liquid fuel injection section is divided into a plurality of fuel injection sections, and the heat-supplementing coupling devices are correspondingly arranged on each fuel injection section, so that heat-supplementing and multi-section hot air evaporation-assisted sintering of various liquid fuels are realized.

Drawings

FIG. 1 is a schematic structural diagram of a liquid fuel concurrent heating coupled hot air sintering apparatus according to the present invention;

FIG. 2 is a diagram showing a state distribution of a material bed in a pallet of the sintering machine;

FIG. 3 is a schematic structural diagram of a liquid fuel concurrent heating coupled hot air sintering apparatus provided with a liquid fuel pool according to the present invention;

FIG. 4 is a schematic structural diagram of the fuel nozzle position of the liquid fuel concurrent heating coupling hot air sintering device according to the present invention;

FIG. 5 is a bottom view of the fuel nozzle location of the present invention;

FIG. 6 is a top view of the fuel nozzle location of the present invention;

FIG. 7 is a schematic structural diagram of a liquid fuel concurrent heating coupled hot air sintering apparatus provided with a detection device according to the present invention;

FIG. 8 is a schematic diagram of a device of the present invention having a plurality of thermal couplers.

Reference numerals:

1: a sintering pallet; s: a complementary thermal coupling device; 2: a hot air hood; 3: a liquid fuel injection device; 301: a liquid fuel manifold; 302: a liquid fuel branch pipe; 30201: a fuel nozzle; 30202: a fuel circulation hole; 303: a liquid fuel pool; 30301: a fuel injection hole; 304: a drive device; 305: a partition plate; 401: a first temperature detection device; 402: a second temperature detection device; 403: a third temperature detection device; 5: a flow valve; l: a thermal medium pipe;

a1: sintering the ore belt; a2: a combustion zone; a3: drying the preheating zone; a4: an overwetting belt; a5: an original material tape.

Detailed Description

A liquid fuel heat-supplementing coupling hot air sintering device comprises a sintering machine trolley 1 and a heat-supplementing coupling device S. The heat supplementing coupling device S comprises a hot air cover 2, a liquid fuel injection device 3 and a heat medium pipeline L. The hot air hood 2 is arranged at the upper part of the sintering machine trolley 1. The liquid fuel injection device 3 includes a liquid fuel header pipe 301 and a liquid fuel branch pipe 302. The liquid fuel header pipe 301 is disposed outside the hot air hood 2 and above the sintering machine pallet 1. One end of the liquid fuel branch pipe 302 is connected with the liquid fuel main pipe 301, the other end of the liquid fuel branch pipe 302 extends into the hot air hood 2, and one end extending into the hot air hood 2 is provided with a fuel nozzle 30201. The heat medium pipeline L is arranged on the hot air hood 2 and is communicated with the inner space of the hot air hood 2.

In the present invention, the liquid fuel injection device 3 further includes a liquid fuel pool 303. A liquid fuel pool 303 is provided within the hot air hood 2. The end of liquid fuel manifold 302 having fuel jets 30201 is connected to liquid fuel pool 303 and liquid fuel manifold 302 extends into or opens into liquid fuel pool 303. The bottom of the liquid fuel pool 303 is provided with a fuel injection hole 30301.

Preferably, the fuel injection hole 30301 is also provided in the side wall of the liquid fuel pool 303. Preferably, a fuel flow hole 30202 is simultaneously formed in the side wall of the liquid fuel branch pipe 302 extending into the liquid fuel pool 303.

Preferably, the liquid fuel injection device 3 further includes a drive device 304. Drive means 304 is provided on liquid fuel pool 303, and drive means 304 drives liquid fuel pool 303 in a rotational motion around liquid fuel branch pipe 302. Preferably, the connection position of liquid fuel branch pipe 302 and liquid fuel pool 303 is located on the central axis of liquid fuel pool 303.

Preferably, the liquid fuel injection device 3 further includes a partition plate 305 disposed in the liquid fuel pool 303. A partition 305 is located between the outer wall of the liquid fuel branch pipe 302 and the inner wall of the liquid fuel pool 303, and the partition 305 is connected to the bottom of the liquid fuel pool 303. The partition plates 305 divide the internal space of the liquid fuel pool 303 into a plurality of regions.

Preferably, the height of the partition 305 is less than the height of the liquid fuel pool 303. Preferably, the ratio of the height of the partition 305 to the height of the liquid fuel pool 303 is 0.1 to 0.9: 1, preferably 0.2 to 0.8: 1, more preferably 0.3 to 0.6: 1.

in the present invention, the number of the partition plates 305 is n, and n partition plates 305 are uniformly distributed radially along the outer circumferential direction of the liquid fuel pool 303 with the liquid fuel branch pipe 302 as the center. The n partition plates 305 uniformly divide the internal space of the liquid fuel tank 303 into n regions, and a plurality of fuel injection holes 30301 are uniformly distributed at the bottom and the side wall of the liquid fuel tank 303 corresponding to each region.

In the present invention, 1 to 100 liquid fuel branch pipes 302, preferably 2 to 80 liquid fuel branch pipes 302, and more preferably 3 to 50 liquid fuel branch pipes 302 are connected to the liquid fuel main pipe 301. Preferably, the spacing between each two adjacent liquid fuel legs 302 is equal; each liquid fuel branch 302 has a fuel jet 30201. One end of each liquid fuel branch pipe 302 provided with a fuel nozzle 30201 is connected with a liquid fuel pool 303. Each liquid fuel pool 303 is correspondingly provided with a driving device 304.

In the present invention, the apparatus further comprises a first temperature detection means 401. The first temperature detection device 401 is disposed on the hot air hood 2 and extends into the hot air hood 2. Preferably, the first temperature detecting means 401 is disposed at the lower portion of the hot air hood 2, i.e., at a position on the hot air hood 2 close to the sintering level.

Preferably, a plurality of first temperature detecting devices 401 are uniformly disposed on the lower portion of the hot air hood 2. Preferably, the first temperature detection device 401 is a thermocouple.

Preferably, the heat medium pipe L is provided with a second temperature detection device 402. Preferably, the heat medium pipeline L is further provided with a flow valve 5.

Preferably, the liquid fuel header pipe 301 is provided with a third temperature detection device 403.

In the present invention, the device comprises a plurality of said complementary thermal coupling means S. Along the running direction of the sintering machine trolley 1, a plurality of heat compensation coupling devices are sequentially arranged above the sintering machine trolley 1, and the heat compensation coupling devices S are closely arranged.

Preferably, the number of said complementary thermal coupling means S is between 1 and 20, preferably between 2 and 10, more preferably between 3 and 8.

Example 1

As shown in fig. 1, the liquid fuel heat-supplementing coupling hot air sintering device comprises a sintering machine trolley 1 and a heat-supplementing coupling device S. The heat supplementing coupling device S comprises a hot air cover 2, a liquid fuel injection device 3 and a heat medium pipeline L. The hot air hood 2 is arranged at the upper part of the sintering machine trolley 1 and is positioned at the downstream of the ignition furnace. The liquid fuel injection device 3 includes a liquid fuel header pipe 301 and a liquid fuel branch pipe 302. The liquid fuel header pipe 301 is disposed outside the hot air hood 2 and above the sintering machine pallet 1. One end of the liquid fuel branch pipe 302 is connected with the liquid fuel main pipe 301, the other end of the liquid fuel branch pipe 302 extends into the hot air hood 2, and one end extending into the hot air hood 2 is provided with a fuel nozzle 30201. The heat medium pipeline L is arranged on the hot air hood 2 and is communicated with the inner space of the hot air hood 2.

As shown in fig. 2, the sinter bed on the pallet 1 of the sintering machine mainly includes, from top to bottom, a sinter band a1, a combustion band a2, a dry preheating band A3, an over-wet band a4, and a raw material band a5 in the thickness direction of the sinter bed.

Example 2

As shown in fig. 3 to 4, embodiment 1 is repeated except that the liquid fuel injection device 3 further includes a liquid fuel pool 303. A liquid fuel pool 303 is provided within the hot air hood 2. One end of liquid fuel branch pipe 302, on which fuel nozzle 30201 is provided, is connected to liquid fuel pool 303 through a bearing, and liquid fuel branch pipe 302 extends into liquid fuel pool 303. The bottom of the liquid fuel pool 303 is provided with a fuel injection hole 30301.

Example 3

Example 2 was repeated except that the fuel injection hole 30301 was also provided in the side wall of the liquid fuel pool 303. The side wall of the liquid fuel branch pipe 302 extending into the liquid fuel pool 303 is synchronously provided with a fuel flow through hole 30202.

Example 4

Embodiment 3 is repeated except that the liquid fuel injection device 3 further includes a drive device 304. Drive means 304 is provided on liquid fuel pool 303, and drive means 304 drives liquid fuel pool 303 in a rotational motion around liquid fuel branch pipe 302. The connection position of liquid fuel branch pipe 302 and liquid fuel pool 303 is located on the central axis of liquid fuel pool 303.

Example 5

Embodiment 4 is repeated as shown in fig. 5 to 6 except that the liquid fuel injection device 3 further includes a partition plate 305 disposed in the liquid fuel pool 303. A partition 305 is located between the outer wall of the liquid fuel branch pipe 302 and the inner wall of the liquid fuel pool 303, and the partition 305 is connected to the bottom of the liquid fuel pool 303. The partition plates 305 divide the internal space of the liquid fuel pool 303 into a plurality of regions.

Example 6

Example 5 is repeated except that the height of the partition wall 305 is smaller than the height of the liquid fuel pool 303. The height of the partition 305 is 1/3 the height of the liquid fuel pool 303.

Example 7

Example 5 is repeated except that the height of the partition wall 305 is smaller than the height of the liquid fuel pool 303. The height of the partition 305 is 1/2 the height of the liquid fuel pool 303.

Example 8

Example 6 was repeated except that the number of the partition plates 305 was 15, and 15 partition plates 305 were uniformly distributed radially along the outer peripheral direction of the liquid fuel pool 303 centering on the liquid fuel branch pipe 302. The 15 partition plates 305 uniformly divide the internal space of the liquid fuel tank 303 into 15 regions, and a plurality of fuel injection holes 30301 are uniformly distributed at the bottom and the side wall of the liquid fuel tank 303 corresponding to each region. The plurality of fuel injection holes 30301 are arranged in a straight line at equal intervals on the bottom and the side wall in each region of the liquid fuel pool 303.

Example 9

Example 6 was repeated except that the number of the partition plates 305 was 20. The internal space of the liquid fuel pool 303 is evenly divided into 20 areas by 20 partition plates 305.

Example 10

Example 6 was repeated except that the number of the partition plates 305 was 5. The 5 partition plates 305 uniformly divide the inner space of the liquid fuel pool 303 into 5 areas.

Example 11

Example 8 was repeated except that 50 liquid fuel branch pipes 302 were connected to the liquid fuel header pipe 301, and the distance between every two adjacent liquid fuel branch pipes 302 was equal. Each liquid fuel branch 302 has a fuel jet 30201. One end of each liquid fuel branch pipe 302 provided with a fuel nozzle 30201 is connected with a liquid fuel pool 303. Each liquid fuel pool 303 is correspondingly provided with a driving device 304.

Example 12

As shown in fig. 7, embodiment 11 is repeated except that the apparatus further includes a first temperature detecting means 401. The first temperature detection device 401 is disposed on the hot air hood 2 and extends into the hot air hood 2. The first temperature detecting device 401 is disposed at the lower portion of the hot air hood 2, i.e. at a position on the hot air hood 2 close to the sintering charge level. A plurality of first temperature detection devices 401 are uniformly arranged at the lower part of the hot air hood 2. The first temperature detection device 401 is a thermocouple.

Example 13

Example 12 was repeated except that the heat medium pipe L was provided with the second temperature detection device 402. The heat medium pipeline L is also provided with a flow valve 5.

Example 14

Embodiment 13 is repeated except that the liquid fuel manifold 301 is provided with a third temperature detecting device 403.

Example 15

As shown in FIG. 8, example 14 is repeated, except that the apparatus comprises 4 of said complementary thermal coupling means S. Along the running direction of the sintering machine trolley 1, 4 heat compensation coupling devices are sequentially arranged above the sintering machine trolley 1, and the heat compensation coupling devices S are closely arranged.

Claims

1. A liquid fuel heat-supplementing coupling hot air sintering device comprises a sintering machine trolley (1) and a heat-supplementing coupling device (S); the heat supplementing coupling device (S) comprises a hot air cover (2), a liquid fuel injection device (3) and a heat medium pipeline (L); the hot air cover (2) is arranged at the upper part of the sintering machine trolley (1); the liquid fuel injection device (3) comprises a liquid fuel main pipe (301) and a liquid fuel branch pipe (302); the liquid fuel main pipe (301) is arranged on the outer side of the hot air cover (2) and is positioned above the sintering machine trolley (1); one end of the liquid fuel branch pipe (302) is connected with the liquid fuel main pipe (301), the other end of the liquid fuel branch pipe (302) extends into the hot air cover (2), and one end extending into the hot air cover (2) is provided with a fuel nozzle (30201); the heat medium pipeline (L) is arranged on the hot air cover (2) and is communicated with the inner space of the hot air cover (2); wherein the width of the sintering pallet (1) is 0.5-15 m.

2. The apparatus of claim 1, wherein: the liquid fuel injection device (3) further comprises a liquid fuel pool (303); the liquid fuel pool (303) is arranged in the hot air cover (2); one end of the liquid fuel branch pipe (302) provided with a fuel nozzle (30201) is connected with the liquid fuel pool (303), and the liquid fuel branch pipe (302) extends into or leads to the liquid fuel pool (303); the bottom of the liquid fuel pool (303) is provided with a fuel injection hole (30301).

3. The apparatus of claim 2, wherein: the side wall of the liquid fuel pool (303) is also provided with a fuel injection hole (30301).

4. The apparatus of claim 3, wherein: the side wall of the liquid fuel branch pipe (302) extending into the liquid fuel pool (303) is synchronously provided with a fuel circulation hole (30202).

5. The apparatus according to any one of claims 2-4, wherein: the liquid fuel injection device (3) further comprises a drive device (304); the driving device (304) is arranged on the liquid fuel pool (303), and the driving device (304) drives the liquid fuel pool (303) to rotate around the liquid fuel branch pipe (302).

6. The apparatus of claim 5, wherein: the connection position of the liquid fuel branch pipe (302) and the liquid fuel pool (303) is positioned on the central axis of the liquid fuel pool (303).

7. The apparatus of any one of claims 2-4, 6, wherein: the liquid fuel injection device (3) further comprises a partition plate (305) disposed in the liquid fuel pool (303); the partition plate (305) is positioned between the outer wall of the liquid fuel branch pipe (302) and the inner wall of the liquid fuel pool (303), and the partition plate (305) is connected with the bottom of the liquid fuel pool (303); the partition plate (305) divides an inner space of the liquid fuel pool (303) into a plurality of regions.

8. The apparatus of claim 5, wherein: the liquid fuel injection device (3) further comprises a partition plate (305) disposed in the liquid fuel pool (303); the partition plate (305) is positioned between the outer wall of the liquid fuel branch pipe (302) and the inner wall of the liquid fuel pool (303), and the partition plate (305) is connected with the bottom of the liquid fuel pool (303); the partition plate (305) divides an inner space of the liquid fuel pool (303) into a plurality of regions.

9. The apparatus of claim 7, wherein: the height of the partition plate (305) is smaller than that of the liquid fuel pool (303).

10. The apparatus of claim 8, wherein: the height of the partition plate (305) is smaller than that of the liquid fuel pool (303).

11. The apparatus of claim 9 or 10, wherein: the ratio of the height of the partition plate (305) to the height of the liquid fuel pool (303) is 0.1-0.9: 1.

12. the apparatus of claim 11, wherein: the ratio of the height of the partition plate (305) to the height of the liquid fuel pool (303) is 0.2-0.8: 1.

13. the apparatus of claim 12, wherein: the ratio of the height of the partition plate (305) to the height of the liquid fuel pool (303) is 0.3-0.6: 1.

14. the apparatus of claim 7, wherein: the number of the partition plates (305) is n, and the n partition plates (305) are uniformly distributed in a radial shape along the peripheral direction of the liquid fuel pool (303) by taking the liquid fuel branch pipe (302) as the center; the n partition plates (305) evenly divide the inner space of the liquid fuel pool (303) into n areas, and a plurality of evenly distributed fuel injection holes (30301) are arranged at the bottom and the side wall of the liquid fuel pool (303) corresponding to each area.

15. The apparatus of claim 11, wherein: the number of the partition plates (305) is n, and the n partition plates (305) are uniformly distributed in a radial shape along the peripheral direction of the liquid fuel pool (303) by taking the liquid fuel branch pipe (302) as the center; the n partition plates (305) evenly divide the inner space of the liquid fuel pool (303) into n areas, and a plurality of evenly distributed fuel injection holes (30301) are arranged at the bottom and the side wall of the liquid fuel pool (303) corresponding to each area.

16. The apparatus of any one of claims 8-10, 12-13, wherein: the number of the partition plates (305) is n, and the n partition plates (305) are uniformly distributed in a radial shape along the peripheral direction of the liquid fuel pool (303) by taking the liquid fuel branch pipe (302) as the center; the n partition plates (305) evenly divide the inner space of the liquid fuel pool (303) into n areas, and a plurality of evenly distributed fuel injection holes (30301) are arranged at the bottom and the side wall of the liquid fuel pool (303) corresponding to each area.

17. The apparatus of claim 14, wherein: n is more than or equal to 2 and less than or equal to 30.

18. The apparatus of claim 15, wherein: n is more than or equal to 2 and less than or equal to 30.

19. The apparatus of claim 16, wherein: n is more than or equal to 2 and less than or equal to 30.

20. The apparatus according to any one of claims 17-19, wherein: n is more than or equal to 3 and less than or equal to 20.

21. The apparatus of claim 20, wherein: n is more than or equal to 4 and less than or equal to 15.

22. The apparatus of claim 5, wherein: the liquid fuel main pipe (301) is connected with 1-100 liquid fuel branch pipes (302).

23. The apparatus of claim 7, wherein: the liquid fuel main pipe (301) is connected with 1-100 liquid fuel branch pipes (302).

24. The apparatus of any one of claims 6, 8-10, 12-15, 17-19, 21, wherein: the liquid fuel main pipe (301) is connected with 1-100 liquid fuel branch pipes (302).

25. The apparatus of claim 22, wherein: the liquid fuel main pipe (301) is connected with 2-80 liquid fuel branch pipes (302).

26. The apparatus of claim 23, wherein: the liquid fuel main pipe (301) is connected with 2-80 liquid fuel branch pipes (302).

27. The apparatus of claim 24, wherein: the liquid fuel main pipe (301) is connected with 2-80 liquid fuel branch pipes (302).

28. The apparatus according to any one of claims 25-27, wherein: the liquid fuel main pipe (301) is connected with 3-50 liquid fuel branch pipes (302).

29. The apparatus of claim 28, wherein: the distance between every two adjacent liquid fuel branch pipes (302) is equal; each liquid fuel branch pipe (302) is provided with a fuel nozzle (30201); one end of each liquid fuel branch pipe (302) provided with a fuel nozzle (30201) is connected with a liquid fuel pool (303); each liquid fuel pool (303) is correspondingly provided with a driving device (304).

30. The apparatus of any one of claims 1-4, 6, 8-10, 12-15, 17-19, 21-23, 25-27, 29, wherein: the device further comprises a first temperature detection device (401); the first temperature detection device (401) is arranged on the hot air cover (2) and extends into the hot air cover (2).

31. The apparatus of claim 5, wherein: the device further comprises a first temperature detection device (401); the first temperature detection device (401) is arranged on the hot air cover (2) and extends into the hot air cover (2).

32. The apparatus of claim 7, wherein: the device further comprises a first temperature detection device (401); the first temperature detection device (401) is arranged on the hot air cover (2) and extends into the hot air cover (2).

33. The apparatus of claim 30, wherein: the first temperature detection device (401) is arranged at the lower part of the hot air hood (2), namely at the position on the hot air hood (2) close to the sintering charge level.

34. The apparatus of claim 31, wherein: the first temperature detection device (401) is arranged at the lower part of the hot air hood (2), namely at the position on the hot air hood (2) close to the sintering charge level.

35. The apparatus of claim 32, wherein: the first temperature detection device (401) is arranged at the lower part of the hot air hood (2), namely at the position on the hot air hood (2) close to the sintering charge level.

36. The apparatus of any one of claims 33-35, wherein: the lower part of the hot air cover (2) is uniformly provided with a plurality of first temperature detection devices (401).

37. The apparatus of claim 36, wherein: the first temperature detection device (401) is a thermocouple.

38. The apparatus of any one of claims 1-4, 6, 8-10, 12-15, 17-19, 21-23, 25-27, 29, 31-35, 37, wherein: a second temperature detection device (402) is arranged on the heat medium pipeline (L); and/or

The liquid fuel main pipe (301) is provided with a third temperature detection device (403).

39. The apparatus of claim 5, wherein: the heat medium pipeline (L) is provided with a second temperature detection device (402).

40. The apparatus of claim 7, wherein: the heat medium pipeline (L) is provided with a second temperature detection device (402).

41. The apparatus of claim 38, wherein: and a flow valve (5) is also arranged on the heat medium pipeline (L).

42. The apparatus of claim 39 or 40, wherein: and a flow valve (5) is also arranged on the heat medium pipeline (L).

43. The apparatus of any one of claims 1-4, 6, 8-10, 12-15, 17-19, 21-23, 25-27, 29, 31-35, 37, 39-41, wherein: the device comprises a plurality of said complementary thermal coupling means (S); along the running direction of the sintering machine trolley (1), a plurality of heat-supplementing coupling devices are sequentially arranged above the sintering machine trolley (1), and the heat-supplementing coupling devices (S) are closely arranged.

44. The apparatus of claim 5, wherein: the device comprises a plurality of said complementary thermal coupling means (S); along the running direction of the sintering machine trolley (1), a plurality of heat-supplementing coupling devices are sequentially arranged above the sintering machine trolley (1), and the heat-supplementing coupling devices (S) are closely arranged.

45. The apparatus of claim 7, wherein: the device comprises a plurality of said complementary thermal coupling means (S); along the running direction of the sintering machine trolley (1), a plurality of heat-supplementing coupling devices are sequentially arranged above the sintering machine trolley (1), and the heat-supplementing coupling devices (S) are closely arranged.

46. The apparatus of claim 43, wherein: the number of the heat compensating coupling devices (S) is 1-20.

47. The apparatus of claim 44, wherein: the number of the heat compensating coupling devices (S) is 1-20.

48. The apparatus of claim 45, wherein: the number of the heat compensating coupling devices (S) is 1-20.

49. The apparatus of any one of claims 46-48, wherein: the number of the heat compensating coupling devices (S) is 2-10.

50. The apparatus of claim 49, wherein: the number of the heat compensating coupling devices (S) is 3-8.