CN108267013B

CN108267013B - Sinter cooling and waste heat utilization system and low-oxygen full-circulation cooling method

Info

Publication number: CN108267013B
Application number: CN201611266647.4A
Authority: CN
Inventors: 张震; 贺新华; 向锡炎; 胡兵; 孙英
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2016-12-31
Filing date: 2016-12-31
Publication date: 2023-10-27
Anticipated expiration: 2036-12-31
Also published as: CN108267013A

Abstract

The sinter cooling and waste heat utilization system comprises a vertical cooler, a first dust remover, a waste heat boiler, a power generation system, a cooling device and a sealing cover device arranged at the lower part of the vertical cooler, wherein a hot air outlet is formed in the upper part or a top cover of the vertical cooler, an air supply device is arranged in the middle of the vertical cooler, a discharge port is formed in the bottom of the vertical cooler, the first dust remover is arranged on a hot air pipeline, an air outlet of the cooling device is connected to the air supply device of the vertical cooler through a second cold air pipeline, and a circulating fan is arranged on the first cold air pipeline or the second cold air pipeline; the air outlet of the sealing cover device is connected to the front section of the first cold air pipeline or the front section of the second cold air pipeline through a third cold air pipeline; also provides a low-oxygen full-circulation cooling method for the sinter.

Description

Sinter cooling and waste heat utilization system and low-oxygen full-circulation cooling method

Technical Field

The invention relates to a sinter cooling and waste heat utilization system comprising a vertical sinter cooler and a sinter cooling method, in particular to a sinter low-oxygen full-circulation cooling process, belonging to the field of iron making and environmental protection.

Background

In recent years, along with the increasing tension of the relation between energy consumption and environmental protection in China, energy conservation and environmental protection are valued by the whole society, and become a key measure for establishing a resource-saving and environment-friendly society. The energy-saving and environment-friendly work relates to aspects, and the energy-saving and environment-friendly work in the industrial field is a key point and a difficult point of the energy-saving and environment-friendly work, especially for the steel industry with high energy consumption and large environmental pollution. The energy consumption of the sintering process is about 15% of the total energy consumption of iron and steel enterprises, and is second to the iron-making process. At present, the total amount of waste heat resources generated by producing 1 ton of sintered ore in large and medium-sized iron and steel enterprises in China is about 1.44GJ, and the recycling rate is only 35-45%. In 2014 (the yield of the sintered ore is 8.91 hundred million tons), about 8 hundred million GJ of sintering waste heat resources are not recycled, and serious environmental pollution is formed while resource waste is caused. Therefore, the efficient recovery and utilization of the waste heat resources in the sintering process become an important direction and approach for energy conservation and environmental protection in the sintering process.

The waste heat resource in the sintering process mainly comprises two parts: one part is the sensible heat of the sinter, and the sensible heat accounts for about 70% of the total amount of waste heat resources; the other part is the sensible heat of the sintering flue gas, which accounts for about 30% of the total amount of waste heat resources. In comparison, the sensible heat quantity of the sintering ore is larger, and the quality is higher; and the sensible heat quantity of the sintering flue gas is smaller, and the quality is lower. Based on the above, the efficient recovery and utilization of the sensible heat of the sinter is the core and the key point of the recovery and utilization of the whole sintering waste heat.

In modern sintering processes, "cooling" is one of the more critical processes. After the sintering of the sintering machine, high Wen Chengpin ore is formed, and the problem of how to perform protective cooling on the high Wen Chengpin ore on the premise of not affecting the quality and the yield of the high Wen Chengpin ore is solved, so that the high Wen Chengpin ore can be conveyed into a finished ore bin through a belt conveyor, and meanwhile, the heat-generating energy carried by the high Wen Chengpin ore is perfectly recycled, so that the high Wen Chengpin ore is a constant research problem for the technical personnel in the industry. Since the 60 s of the 20 th century, the cooling process of sintered ores has been rapidly developed, and is mainly divided into three categories, namely belt cooling, ring cooling and disc cooling. In the later market competition, the belt cooling technology is eliminated, and the rest ring cooling technology and the disc cooling technology have advantages and disadvantages. But comprehensively comparing, the disc cooler has better utilization rate of the waste heat than the ring cooler (all sensible heat of the sinter is recycled), so the disc cooler is widely applied to foreign markets, and the patent also describes the technology of the disc cooler.

The technology of the disk cooler starts to develop from the 70 s, and the disk cooler is started to transversely cool the disk, namely, cooling air flows from the inner ring to the outer ring of the disk cooler, transversely passes through a material layer to be cooled to exchange heat with the material layer, and the cooling air after heat exchange is directly discharged to the atmosphere. The technology of the dish cooler is an exhaust type longitudinal dish cooling technology proposed by Hitachi, japan and well-contained steel. The technology adopts air draft, cooling air is pumped into the bottom of the material to be cooled from the atmosphere, then longitudinally passes through the material layer upwards, and finally is blown out from the upper part of the material layer to enter the subsequent working procedures. This solution has been greatly optimized and advanced compared to the very beginning one, which is described in detail below.

JP2008232519a (mitsubishi hitachi and well-held steel, hereinafter D1) discloses an induced draft type longitudinal disc cooling technique, see fig. 1 therein: the hot sinter falls into the feeding chute from the tail part of the sintering machine, and is piled up into a material column with a certain height in the chute, so that the effect of uniform blanking is achieved on one hand, and the effect of preventing the air from flowing through the feeding port is achieved on the other hand. Mineral aggregate continuously passes through the hood downwards and then enters the box body of the tray cooler to be pushed into a material column with a certain height. Meanwhile, the air near the disc cooler is sucked into the material column through the louver air inlet device under the influence of the negative pressure of the exhaust fan, and passes through the material column from bottom to top to exchange heat with the material column, and the air after heat exchange passes out of the top surface of the material column and enters the air outlet to be sent to the gravity dust remover and the waste heat boiler, and finally passes through the exhaust fan and is discharged. The sintered material cooled by air forms an annular stacking area with a cross section of a triangle with a stacking angle of 37 degrees at a tray at the lower part of the tray cooler, and when the sintered material is rotated to a discharging area, the sintered material is scraped by a scraping plate device, and the cooling process is completed to enter the next process link.

Although the 'induced draft type longitudinal disc cooling technology' of Mitsubishi Hitachi and Zhongsheng steel has obvious progress compared with the conventional technology, the following five defects still exist:

1) The overall height requirement of the device is too high: because the 'induced draft type longitudinal disc cooling technology' adopts an induced draft mode, a material seal, namely a material column piled in a feeding chute in the figure 1 of D1, is necessarily arranged at the position of a feeding inlet, and the height of the material seal is 1.2-1.5 times of the height of the material column in the box body of the disc cooler. Therefore, the height of the whole disc cooling device is increased intangibly, and the elevation of the whole sintering machine is required to be increased or the civil engineering plane of the disc cooling machine is required to be dug downwards during construction and installation. Whichever way is selected, the method can cause high primary investment cost, and is not cost-effective in economic index;

2) The open circulation of the wind flow leads to low waste heat utilization rate and environmental pollution: because the wind flow of the 'induced draft type longitudinal disc cooling technology' is in open circuit circulation, the air discharged from the waste heat boiler is directly discharged outwards and is not recycled, so that more than 100 degrees of sensible heat of the air is wasted, and the discharged air contains a large amount of small particle dust, so that the air is polluted by particles to a certain extent;

3) The material at the feed inlet is seriously worn: because the material seal is arranged at the feeding chute by the 'induced draft type longitudinal disc cooling technology', a friction distance exists between the lower part of the material seal and the upper layer of the material surface in the disc cooler box body. At the moment, the sintering material is easy to pulverize and crush when rubbed under the double-layer severe working condition of high temperature and upper material column extrusion, thereby reducing the yield of the sintering machine;

4) The environmental pollution is serious: because of the negative pressure air draft technology adopted by the air draft type longitudinal disc cooling technology, a sealing cover device is not arranged at the tray at the lower part of the box body. Thus, when the sinter is scraped by the scraper device, a large amount of fine particles and dust are easy to splash. In addition, once the exhaust fan is in fault maintenance, all the material dust pushed around the disc cooler can enter the atmosphere, and the operation environment beside the disc cooler is affected adversely;

5) The heat efficiency of the waste heat boiler is not the highest: because the air passing through the material layer is not accurately classified according to the air temperature by the 'induced draft type longitudinal disc cooling technology', and is fully mixed into the waste heat boiler, when the air temperature at the outlet of the low-temperature section is too low, the temperature of the air entering the waste heat boiler is inevitably lowered, and therefore the heat efficiency value of the waste heat boiler is reduced.

At present, the sintering ore cooling mainly adopts a traditional belt type cooler or a ring type cooler based on the principle of rapid cooling by strong air and one-time loading and unloading cooling. The cooler has the problems of high air leakage rate, high power consumption of a fan, low sensible heat recovery rate, low thermal efficiency of a boiler and the like no matter which cooling mode is adopted. In other words, in the current large environment with more and more strict requirements on energy conservation, consumption reduction and green manufacturing in the market, the original equipment structure has hardly realized efficient recovery and utilization of the sensible heat of the sinter. Therefore, the limitation of traditional ring cooling or belt cooling is broken through, and the development of a process and technical equipment for efficiently recovering the sensible heat of the sinter is a necessary path for energy conservation and environmental protection in the sintering industry.

Therefore, through a great deal of research work on the sensible heat recovery of the sintering ores at home and abroad, a low-oxygen full-circulation cooling process based on low-wind slow-cooling sintering ores is provided. The process has the characteristics of low cooling speed of the sinter, small ton consumption cooling air quantity, relatively small waste gas quantity, high waste gas temperature, high thermal efficiency of the boiler, capability of completely utilizing the cooling waste gas by the boiler, and general sensible heat recovery rate of the sinter reaching about 70 percent. In addition, the process can also overcome the problem of secondary sintering agglomeration of the sinter in the vertical cooling device and prevent the blockage phenomenon of the vertical cooling device.

Disclosure of Invention

Therefore, a large amount of research work on the sensible heat recovery of the sintering ores at home and abroad is performed, and a technology for cooling the countercurrent thick material layer of the sintering ores based on low air cooling is provided.

In the present application, "optional" means the presence or absence.

In the present application, the vertical cooler has a tower structure, and thus, may also be referred to as a tower cooler.

The inventor of the present application has found through research that the combustion of carbon residue in the sinter produces liquid phase in the sinter as a main cause of caking and blockage in the cooler, and in order to prevent caking in the cooler, a low-oxygen full-cycle cooling process is developed.

The cooling process mainly comprises a vertical cooler, a hot sinter conveying device, a dust removing device, a waste heat boiler, a power generation system, a cooling device, a circulating fan, a sealing device, a sealing fan, a smoke generating furnace and/or a nitrogen pipeline, a valve, a gas supplementing valve, a diffusing chimney and the like, and the system formed by the process devices is a low-oxygen full-circulation sinter countercurrent thick material layer cooling process.

According to a first embodiment of the present invention, as shown in fig. 1 to 3, there is provided a sinter cooling and waste heat utilization system comprising a vertical cooler, a first dust collector (preferably an impact plate gravity dust collector), a waste heat boiler and power generation system, a cooling device (preferably a water-cooled cooling device), and a sealed hood device provided at a lower portion of the vertical cooler, wherein a hot air outlet is provided at an upper portion or a top cover of the vertical cooler, a supply device is provided at a middle portion and a discharge port(s) is provided at a bottom portion,

the air outlet of the cooling device (preferably the water-cooled cooling device) is connected to the air supply device of the vertical cooler through a second air duct, and a circulating fan is arranged on the first air duct or the second air duct; and

The sealing cover device is arranged at the discharge outlet of the lower part of the vertical cooler, and the air outlet of the sealing cover device is connected to the front section of the first cold air pipeline or the front section of the second cold air pipeline through an air supply pipeline (or a third cold air pipeline) of the sealing cover device.

Preferably, an exhaust fan is arranged on the air supply pipeline (or the third cold air pipeline) of the sealing cover device.

A nitrogen pipeline with a nitrogen valve and an air supplementing pipeline with a supplementing valve are connected to the first cold air pipeline (for example, the middle and rear section of the cold air pipeline) or the second cold air pipeline.

Wherein a flue gas generator (i.e. its air outlet is connected to the hot air duct) is arranged on the hot air duct upstream or downstream of the first dust separator.

Preferably, a diffusing chimney is provided at the top of the tower body of the vertical cooler, for example, at the top cover of the tower body.

Optionally or optionally, a second dust separator (preferably a multi-tube dust separator) is arranged on the first cold air duct. Preferably, a second dust collector (preferably a multi-tube dust collector) is provided on the first cold air duct.

Typically, a vertical cooler has a silo and a distribution pipe at its top.

Preferably, the number of discharge outlets in the lower part of the vertical cooler is 4-12, preferably 6-10, 6-8.

The air supply device comprises an air ring air supply device and a hood air supply device. More specifically, the air supply device comprises an air ring air supply device, an air ring which is communicated with the air ring air supply device and is positioned at the side part of the tower body of the cooler, and an air cap air supply device which is communicated with the air cap air supply device and extends upwards into the tower body from the bottom (preferably, the central position of the bottom) of the tower body.

The sealing cover device is a single cover body or an integral cover body which seals all the discharging outlets, the lower part of the cover body is provided with a discharging hole, and a cold sinter conveyor is arranged below the discharging hole; alternatively, the seal housing means described above is a single housing or an integral housing that encloses all of the discharge outlets and the start of the cold sinter conveyor. The sealed cover device is used for collecting all the gas or cold air discharged or leaked from the discharging outlet of the cooler and conveying and circulating the gas or cold air into the cooler through the air supply pipeline of the sealed cover device, so that basically all the cooling gas or cooling air circulates in the system, namely, the full circulation is formed, the oxygen content in the cooling gas entering the tower body of the cooler can be greatly reduced, and secondary sintering of high-temperature sintered ores is avoided.

The sinter cooling and waste heat utilization system further comprises: upstream of the vertical cooler, a sinter machine, a sinter crusher, and a hot sinter conveyor (for conveying hot sinter to the top of the vertical cooler).

Preferably, the vertical cooler described herein is a multiple gate discharge vertical cooler, as shown in FIG. 4, or a multiple discharge cone discharge vertical cooler, as shown in FIG. 11; or a pan feeder discharge type vertical cooler as shown in fig. 10.

As shown in fig. 4 to 9 and fig. 21 and 22, the multiple shutter discharging type vertical cooler includes: the device comprises a storage bin, a distributing pipe, a tower body, an air ring, an air cap and a plurality of discharging outlets, wherein the tower body consists of a tower body top cover, a tower wall, a tower body cone positioned below the tower wall and a tower bottom;

wherein the top cover is fixedly connected with the upper end of the tower wall, the stock bin is arranged above the top cover, the upper end of the material distribution pipe is connected with the bottom of the stock bin, the lower end of the material distribution pipe extends into the lower part of the top cover,

the plurality of discharging outlets are annularly distributed around the lower part of the tower body cone or uniformly distributed along the circumferential direction of the lower part of the tower body cone,

A fixed gap is formed between the lower part of the tower wall and the top of the tower cone as a wind ring,

a hood extending upwards into the inner space of the tower body is arranged at the central position of the tower bottom, and

a discharge gate or a discharge flashboard is correspondingly arranged at each discharge outlet, and a discharge channel is arranged below the discharge gate; preferably, the discharge channel is a discharge chute corresponding to each discharge outlet or the discharge channel is a discharge hopper (of unitary design). Generally, in a multiple-gate discharge type vertical cooler, a hood extends into the inner space of a tower body so that the height of a hood air duct (i.e., the stem of the hood) is sufficient to reach the height of a wind ring.

Preferably, a cold sinter conveyor is provided at or below the end of the discharge channel, e.g. at the end of the discharge chute or below the discharge hopper.

Preferably, in the multiple-gate discharge type vertical cooler, a tower wall transition section is further provided at a lower part or lower part of the tower wall and above the tower cone. Thus, the tower cone can be more conveniently installed at the lower part of the tower wall. In this case, the tower is formed by a tower top cover, a tower wall and a lower (inverted conical or inverted conical) tower wall transition. The tower wall transition section assumes an inverted conical or inverted conical cylindrical shape, i.e., its lower portion has an inner diameter smaller than its upper portion. May also be referred to as a transition bucket or as an upper cone bucket. The cone angle of the inverted or inverted cone-shaped tower wall transition is typically 60-75 degrees, preferably >63.5 degrees.

The outer diameter of the lower end of the tower body cone is smaller than that of the upper end. Thus, the tower cone takes on the shape of an inverted cone.

Optionally or optionally, a discharge outlet seal cap is provided at each discharge outlet in the lower portion of the cone of the tower.

Preferably, the vertical cooler with the plurality of gate plates for unloading further comprises an air ring air supply device, wherein the air ring air supply device comprises an air ring air channel and an air ring air pipe connected to the air ring air channel, and the air ring air channel surrounds the air ring and is communicated with the air ring.

Preferably, the vertical cooler with the plurality of flashboard unloading type further comprises a hood air supply device, wherein the hood air supply device comprises a plurality of hood branch pipes, an annular or C-shaped hood air duct and a hood air pipe connected with the hood air duct, one end of each hood branch pipe is communicated with the hood air duct, and the other end of each hood branch pipe is communicated with the bottom or the stem of the hood. The stem is a hood air duct.

Preferably, a temperature measuring probe is arranged at the lower part of the tower wall; preferably, the temperature measuring probe is a thermocouple temperature sensor.

Generally, the air supply device includes an air ring and an air ring air supply device, and a hood air supply device.

With the wind ring as a division point, the height (or called lower material layer height) h1 of the tower cone is larger than the stacking height (or called upper material layer height) h2 of the tower wall.

Preferably, the number of the discharge outlets at the lower part of the cone of the tower body is 4-12, preferably 6-10 and 6-8.

In general, in a multiple-shutter discharging type vertical cooler, the number of hood branches is 1 to 12, preferably 2 to 10, more preferably 4 to 8, still more preferably 6 to 8; preferably, the hood branch is connected to (e.g., bent down to) the bottom of the hood or through the wall of the tower cone to the stem of the hood (i.e., the hood air duct).

Preferably, the hood comprises a support frame, a hood top cover, a plurality of conical cover plates and a hood air pipe (or a stem part called as a hood), wherein the plurality of conical cover plates are sequentially arranged on the support frame, and the diameters of the bottoms of the conical cover plates are sequentially increased from top to bottom; the hood top cover is arranged above the topmost conical cover plate, and the air pipe is arranged below the support frame and connected with the support frame; preferably, the hood top cover is of a conical structure.

Preferably, as shown in fig. 9, the vertical cooler with multiple gate plates for unloading further comprises a control system, wherein the control system is connected with the air ring air supply device, the hood air supply device, the temperature measuring probe, the discharging gate and the cold sinter conveying device, and controls the operation of the air ring air supply device, the hood air supply device, the temperature measuring probe, the discharging gate and the cold sinter conveying device.

In the invention, the materials are discharged from the lower part of the cone of the tower body through the discharge gate from inside to outside, so that the downward discharge speed difference of the materials at the center and the edge in the vertical cooler tower can be reduced as much as possible. The cooled sinter discharged from the discharge gate flows into a lower discharge channel (for example, a lower chute), flows out from a lower outlet of the discharge channel (for example, a lower chute), flows into a conveyor at the lower part of the discharge channel, and is conveyed to the next process by the conveyor. After heat exchange with the hot sinter, the cooling air entering the tower cools the hot sinter to below 150 ℃, and the hot sinter is heated to a higher temperature to become hot air, the hot air passes through the material surface at the top end of the material layer after passing through the material layer, enters a material-free area at the upper end of the tower formed by the top cover and the tower wall, and then is discharged through a hot air outlet to enter a subsequent waste heat power generation system.

The storage bin is of a cylindrical or square barrel-shaped structure and is used for buffering and containing hot sinter conveyed by the conveyor, and the bottom of the storage bin is fixedly connected to the top cover. The distributing pipe is of a cylindrical or square barrel-shaped structure and is positioned at the bottom of the storage bin, the upper end of the distributing pipe is fixedly connected with the bottom of the storage bin, the lower end of the distributing pipe stretches into the lower part of the top cover and is positioned in the tower body formed by the top cover and the tower wall, wherein sintered ore can enter the distributing pipe from the bottom of the storage bin under the action of gravity and can flow out freely from an opening at the lower part of the distributing pipe under the action of gravity. The tower wall is a cylindrical or square barrel-shaped structure, the upper end of the tower wall is fixedly connected with the top cover, a fixed gap is formed between the lower end of the tower wall and the cone of the tower body, namely, a wind ring is fixed on the foundation at a certain position in the middle of the fixed gap, and the weight of the top cover is supported on the periphery of the tower wall. The wind ring is a peripheral cavity formed between the tower wall and the tower cone, and cooling wind can uniformly blow the sinter in the tower through a circle of wind ring to cool the sinter. The wind ring wind supply device can supply wind to the wind ring for a circle. The hood is located in the lower part of the tower wall and located on the tower cone, and cooling air can be blown into the sintered ore in the tower uniformly through the hood in a circle to cool the sintered ore. The tower body cone is positioned at the lower end of the tower wall and is fixed with the foundation, meanwhile, a wind ring is formed between the tower body cone and the tower wall, and the wind cap is fixed at the upper end of the wind ring. Preferably, the shape of the cone of the tower body is a conical structure with a large upper part and a small lower part. The cooled sinter flows into the tower cone under the action of gravity. The material in the tower body cone can control the discharging speed of the corresponding material outlet of the tower body cone through the up-and-down movement of each discharging gate. Generally, the hot air outlet is positioned at the upper part of the tower wall, fixedly connected with the tower wall and communicated with the inner part of the tower body, and hot air passes through the material surface at the top end of the material layer after passing through the material layer, enters a material-free area at the upper end of the tower body formed by the top cover and the tower wall, is discharged through the hot air outlet and enters a subsequent waste heat power generation system.

Preferably, a plurality of temperature measuring probes are uniformly arranged at the lower part of the tower wall along the circumferential direction, the temperature measuring probes are positioned at the upper part of the wind ring and fixed on the tower wall, one end of each temperature measuring probe extends into a small section in the tower body and is used for detecting the temperature of the sinter at the position, and preferably, the temperature measuring probes can be thermocouple temperature sensors. When the detected sinter temperature at a certain position in the circumferential direction reaches the cooling effect, a discharging gate which corresponds to the area and is positioned below the cone of the tower body is normally opened to perform normal discharging, otherwise, the opening height of the discharging gate is correspondingly reduced or the discharging gate is closed, the sinter in the area is cooled for a period of time, and when the sinter temperature reaches the cooling effect, normal discharging is performed.

Preferably, the air ring air supply device consists of an air ring air duct and an air ring air duct, the air ring air duct is arranged on the outer side of the air ring and surrounds the air ring, and cooling air can uniformly supply air to the air ring through the air ring air duct, and the air ring air duct is communicated with the air ring air duct and supplies air to the air ring air duct.

Preferably, the hood air supply device consists of a hood branch pipe, a hood air duct and a hood air duct. The hood branch pipes are uniformly distributed in a plurality along the circumferential direction. Preferably, each hood branch pipe is connected with the stem of the hood through the wall of the tower cone, or is bent downwards to be connected with the bottom of the hood. The hood air duct is responsible for evenly supplying air to each hood branch pipe. The hood air pipe is responsible for supplying air to the hood air channel.

The hot sinter crushed by the single-roller crusher is transported to the top of the vertical cooler by the hot sinter conveying device, enters the vertical cooler bin, continuously flows from top to bottom under the action of gravity, passes through the vertical cooler bin and the material distribution pipe, is naturally piled in the tower body, performs countercurrent heat exchange with cooling air from bottom to top in the tower body, cools the temperature of the sinter to below 150 ℃, passes through the tower cone at the lower part of the vertical cooler, is discharged into a discharge channel (such as a lower chute) by the discharge gate, is discharged onto the cold sinter conveyor from the tail end or the lower part of the discharge channel, and is transported to the next process by the cold sinter conveyor.

Under the action of a circulating fan, cooling gas is supplied into the machine body from the vertical cooler air ring air supply device and the air cap air supply device through the air ring and the air cap at a certain pressure, passes through the sinter material layer from bottom to top, and performs countercurrent heat exchange with the sinter. The temperature of the cooling gas is gradually increased after heat exchange, and the cooling gas is discharged from the sinter level in the vertical cooler tower to form high-temperature hot air. The high-temperature hot air is discharged through a hot air outlet at the upper part of the vertical cooler. The discharged high-temperature hot air enters a subsequent waste heat power generation system.

Preferably, the apparatus also has a self-feedback discharge adjustment function. And detecting the temperature of the sintering ore in the corresponding area through the temperature measuring probe, when the detected temperature of the sintering ore in a certain circumferential position reaches the cooling effect, normally opening a discharging gate below the cone of the tower body corresponding to the area to perform normal discharging, otherwise, correspondingly reducing the height of an opening of the discharging gate or closing the discharging gate to cool the sintering ore in the area for a period of time, and after the temperature of the sintering ore reaches the cooling effect, performing normal discharging.

As shown in fig. 11-18 and fig. 21 and 22, the multiple discharge cone hopper discharge type vertical cooler includes: the device comprises a storage bin, a distributing pipe, a tower body formed by a tower body top cover and a tower body wall, a plurality of discharging cone hoppers, an air ring, an air cap and a hot air outlet arranged on the upper part of the tower body wall or the tower body top cover, wherein the discharging cone hoppers are arranged below the position Yu Dabi);

the plurality of discharging cone hoppers are annularly distributed at the lower end of the tower wall or uniformly distributed along the circumferential direction,

a fixed gap is formed between the lower part of the tower wall and the tops of the plurality of discharging cone hoppers to be used as an air ring,

A hood extending upwards into the space in the tower body is arranged at the central position of the bottom of the tower body, and

a discharging device is arranged below the discharging outlet of each discharging cone bucket.

In the application, the bottom of the tower body consists of a hood positioned at the center of the bottom and a plurality of discharge cone hoppers distributed in a ring shape. That is, there is a round of discharge cone hopper at the lower part of the tower wall.

Preferably, the vertical cooler with the discharging cone hoppers comprises an air ring air supply device, wherein the air ring air supply device comprises an air ring air channel and an air ring air pipe connected to the air ring air channel, and the air ring air channel surrounds the air ring and is communicated with the air ring.

Preferably, the vertical cooler with the discharging cone hoppers comprises a hood air supply device, wherein the hood air supply device comprises a plurality of hood branch pipes, an annular or C-shaped hood air duct and hood air pipes connected with the hood air duct, one end of each hood branch pipe is communicated with the hood air duct, and the other end of each hood branch pipe is communicated with the bottom of the hood.

Preferably, a cold sinter conveying device is arranged below the tail end of the discharging device.

Preferably, a (inverted conical cylindrical) tower wall transition section is further provided at or below the lower part of the tower wall and above the discharge cone. Thus, the discharging cone hopper is more convenient to install at the lower part of the tower wall. In this case, the tower is formed by a tower top cover, a tower wall and a lower (back-tapered) tower wall transition. The tower wall transition section exhibits an inverted conical cylindrical shape, i.e. its lower portion has an inner diameter smaller than the inner diameter of its upper portion. May also be referred to as a transition bucket or as an upper cone bucket. The cone angle of the inverted cone-shaped tower wall transition is typically 60-75 degrees, preferably >63.5 degrees.

Preferably, the middle part or the lower part of the discharge cone hopper is provided with an adjusting rod. The discharging speed of the discharging cone hopper is regulated by regulating the depth of the regulating rod inserted into the material layer.

A plurality of temperature probes, preferably thermocouple temperature sensors, are arranged at the lower part of the tower wall or at the transition section of the tower wall (preferably along the circumferential direction thereof).

In the vertical cooler with a plurality of discharging cone hoppers for discharging, the air supply device comprises an air ring and an air ring air supply device, and an air cap air supply device.

With the wind ring as a division point, the height (or called lower material layer height) h1 of the discharge cone hopper is larger than the stacking height (or called upper material layer height) h2 of the tower wall.

Preferably, the number of the discharge cone hoppers is 4 to 12, preferably 6 to 10, preferably 6 to 8.

Preferably, the number of the hood branches is 1 to 12, preferably 2 to 10, more preferably 4 to 8, and even more preferably 6 to 8. More preferably, each hood branch is shown in the gap between two adjacent discharge cones.

Preferably, the hood comprises a support frame, a hood top cover, a plurality of conical cover plates and a hood air duct (which may also be referred to as a stem of the hood). Wherein a plurality of toper apron sets gradually on the support frame, and the hood top cap sets up in the top of the toper apron of top, and the tuber pipe setting is in the below of support frame and is connected with the support frame. Preferably, the hood top cover is of a conical structure.

Typically, the cone angle of the hood top cover is greater than the cone angle of the cone-shaped cover plate. The hood is arranged at the center of the bottom of the tower body and extends upwards into the tower body, so that the length of the air inlet path is consistent with the form of the material stacking thickness in the tower body, and the air flow resistance of different parts is ensured to be approximately consistent.

Preferably, an air flow channel is formed between the upper and lower adjacent conical cover plates.

Preferably, the cone angle of the hood top cover is larger than that of the cone cover plate.

In the vertical cooler with a plurality of discharging cone hoppers for discharging, the discharging equipment is a vibrating feeder. Preferably, the discharging device is a double-layer vibrating feeder, and the double-layer vibrating feeder comprises a machine body bracket, an upper-layer vibrating groove, a lower-layer vibrating groove and a vibrator; the upper layer vibration groove and the lower layer vibration groove are arranged on the machine body support, the upper layer vibration groove is located above the lower layer vibration groove, and the upper layer vibration groove and the lower layer vibration groove are respectively connected with the vibrator. Preferably, the upper layer vibration groove and/or the lower layer vibration groove are/is provided with an adjusting device, and the adjusting device adjusts the inclination angle of the bottom plate of the lower layer vibration groove.

Preferably, the vibrator includes an upper vibrator and a lower vibrator, the upper vibrator is connected with the upper vibration groove, and the lower vibrator is connected with the lower vibration groove. Preferably, the upper layer vibration groove and the lower layer vibration groove are arranged on the machine body bracket through springs.

Preferably, the vertical cooler with the discharging cone hoppers comprises a control system, wherein the control system is connected with the air ring air supply device, the air cap air supply device, the temperature measuring probe, the adjusting rod, the cold sintering ore conveying device and the discharging equipment and controls the operation of the air ring air supply device, the air cap air supply device, the temperature measuring probe, the adjusting rod, the cold sintering ore conveying device and the discharging equipment, as shown in fig. 18.

In the present application, the tower wall is a cylindrical or square barrel-like structure. I.e. the cross-section of the tower wall is circular, elliptical, square or rectangular.

As shown in fig. 10 and 19 and 20, a discharge type vertical cooler for a panel feeder, the discharge type vertical cooler for a panel feeder comprising: the device comprises a storage bin, a distributing pipe, a tower body formed by a tower body top cover and a tower wall, a plurality of discharging cone hoppers, an air ring, an air cap and a hot air outlet, wherein the discharging cone hoppers, the air ring and the air cap are arranged below the tower wall;

a plate type ore feeder is arranged below each discharge cone bucket.

Preferably, the unloading type vertical cooler of the plate-type ore feeder further comprises an air ring air supply device. The air ring air supply device comprises an air ring air channel and an air ring air pipe connected to the air ring air channel, wherein the air ring air channel surrounds the air ring and is communicated with the air ring.

Preferably, the discharging type vertical cooler of the plate type ore feeder further comprises a hood air supply device. The hood air supply device comprises a plurality of hood branch pipes, an annular or C-shaped hood air duct and hood air pipes connected with the hood air duct, wherein one end of each hood branch pipe is communicated with the hood air duct, and the other end of each hood branch pipe is communicated with the bottom of the hood.

Generally, a cold sinter conveying device is arranged below a discharge hole of the plate type ore feeder. Preferably, it is: a discharging chute(s) or a discharging hopper (of integral design) is arranged below the discharging hole of the plate type ore feeder, and a cold sinter transporting device is arranged below the discharging chute(s) or the discharging hopper.

Preferably, a tower wall transition is further provided at the lower or lower part of the tower wall and above the discharge cone. Thus, the discharging cone hopper is more convenient to install at the lower part of the tower wall. In this case, the tower is formed by a tower top cover, a tower wall and a lower (back-tapered) tower wall transition. The tower wall transition section exhibits an inverted conical cylindrical shape, i.e. its lower portion has an inner diameter smaller than the inner diameter of its upper portion. May also be referred to as a transition bucket or as an upper cone bucket. The cone angle of the inverted cone-shaped tower wall transition is typically 60-75 degrees, preferably >63.5 degrees.

Preferably, a plurality of temperature probes are arranged at the lower part of the tower wall or on the transition section of the tower wall, preferably along the circumferential direction thereof; preferably, the temperature measuring probe is a thermocouple temperature sensor.

Preferably, in the unloading type vertical cooler of the plate type ore feeder, the height h1 of the discharging cone hopper is larger than the stacking height h2 of the tower wall.

Typically, the number of discharge cones is 4-12, preferably 6-10, 6-8. The cross sections of the tops of the discharge cones abut each other to form a ring.

Preferably, the number of the hood branch pipes is 1-12, preferably 2-10, more preferably 4-8, and even more preferably 6-8; preferably, each hood branch is located in a gap between two adjacent discharge cones.

Preferably, the hood comprises a support frame, a hood top cover, a plurality of conical cover plates and a hood air pipe, wherein the conical cover plates are sequentially arranged on the support frame, the hood top cover is arranged above the topmost conical cover plate, and the air pipe is arranged below the support frame and connected with the support frame; preferably, the hood top cover is of a conical structure.

Generally, an air flow channel is formed between the upper and lower adjacent conical cover plates.

The cone angle of the hood top cover is larger than that of the cone-shaped cover plate. The hood is arranged at the center of the bottom of the tower body and extends upwards into the tower body, so that the length of the air inlet path is consistent with the form of the material stacking thickness in the tower body, and the air flow resistance of different parts is ensured to be approximately consistent.

The invention adopts the plate-type ore feeder to discharge, and the discharging equipment can well control the discharging speed.

Preferably, the discharging type vertical cooler of the plate-type ore feeder further comprises a control system, wherein the control system is connected with the air ring air supply device, the air cap air supply device, the temperature measuring probe, the adjusting rod, the cold sinter conveying device and the plate-type ore feeder and controls the operation of the air ring air supply device, the air cap air supply device, the temperature measuring probe, the adjusting rod, the cold sinter conveying device and the plate-type ore feeder.

The high temperature pellet shaped agglomerate has sticky surfaces which, once cooled, adhere to each other and the prior art devices often cause difficult discharge, however, the device of the present application solves this problem well.

Typically, the height of the tower body, consisting of the top cover and the tower wall, is typically 6-20 meters, preferably 7-18 meters, more preferably 8-15 meters. The outer diameter of the column is generally from 8 to 30 meters, preferably from 9 to 27 meters, preferably from 10 to 25 meters, preferably from 11 to 22 meters, more preferably from 12 to 20 meters.

In the present application, the diameter of the hood is generally 1.5 to 4 meters, preferably 1.8 to 3.5 meters, more preferably 2 to 3 meters, still more preferably 2.2 to 2.8 meters, for example 2.5 meters.

In the present application, the diameter or inner diameter of the wind ring is generally 7 to 26 meters, preferably 8 to 24 meters, preferably 9 to 22 meters, preferably 10 to 20 meters, more preferably 12 to 15 meters.

The diameter or inner diameter of the wind ring is generally 0.65 to 0.96 times, preferably 0.68 to 0.94 times, preferably 0.70 to 0.92 times, more preferably 0.73 to 0.9 times, more preferably 0.78 to 0.88 times, more preferably 0.8 to 0.86 times the outer diameter of the tower body.

The chute as a discharge channel has a width of, for example, 0.6-1.5 meters (e.g., 1 meter) and a height of 7-14 meters (e.g., 9 meters).

According to a second embodiment of the present invention, there is also provided a sinter low-oxygen full cycle cooling method or a sinter low-oxygen full cycle cooling method using the above-described sinter cooling and waste heat utilization system, the method comprising the steps of:

(1) Hot sinter from the sintering machine enters a storage bin of the vertical cooler, continuously flows from top to bottom under the action of gravity, and is piled in a tower body of the vertical cooler through a distributing pipe;

(2) The air supply device of the vertical cooler, namely an air ring air supply device and an air cap air supply device, respectively convey circulating (namely, circulating in the system) cooling gas (such as air, flue gas, cold air or mixed gas of air and nitrogen) with low oxygen content (such as less than 15vol%, preferably less than 12vol%, preferably less than 8vol%, and more preferably less than 5 vol%) into the tower body through the air ring and the air cap, the cooling gas passes through a sinter material layer accumulated in the tower body from bottom to top, and performs countercurrent heat exchange with the sinter, the temperature of the cooling gas gradually rises after heat exchange, the cooling gas is discharged through the sinter material surface in the tower body of the vertical cooler to form high-temperature hot air, and the high-temperature hot air is discharged through a hot air outlet;

(3) The high-temperature hot air discharged from the hot air outlet is conveyed through a hot air pipeline and enters the waste heat boiler and the power generation system for waste heat utilization after being dedusted by a first deduster (preferably an impact plate type gravity deduster), cold air discharged from the waste heat boiler and the power generation system is conveyed to a cooling device (preferably a water-cooled cooling device) by a first cold air pipeline for further cooling, and cold air discharged from the cooling device (preferably the water-cooled cooling device) is conveyed to an air supply device of the vertical cooler by a second cold air pipeline for further supplying cooling gas to an air ring air supply device and an air cap air supply device respectively;

(4) Sinter deposited in the tower body of the cooler is cooled by countercurrent heat exchange with cooling gas flowing from bottom to top, and discharged onto the cold sinter conveyor through a discharge outlet at the lower part of the vertical cooler (for example, discharged onto the cold sinter conveyor through a discharge outlet of a tower cone or a discharge cone hopper at the lower part of the vertical cooler); and

(5) The cold air collected in the sealed cover device at the lower part of the vertical cooler is conveyed through the air supply pipeline (or the third cold air pipeline) of the sealed cover device and is converged with the cold air in the second cold air pipeline or the first cold air pipeline.

Preferably, the method further comprises, prior to step (1):

(1b) Pretreatment: the circulation fan is turned on, the nitrogen valve of the nitrogen line is opened and/or the flue gas generator is started (and the flue gas outlet valve of the flue gas generator is opened), and nitrogen and/or low-oxygen flue gas (preferably less than 12%, more preferably less than 5%) is introduced into the system (i.e. the gas circulation line) so that the oxygen content of the cooling gas circulated in the system (or the gas circulation line) is less than 15vol% (preferably less than 12vol%, preferably less than 8vol%, more preferably less than 5%).

Alternatively, the method further comprises, prior to step (1):

(1b) Pretreatment: the cold (e.g. temperature below 150 ℃, such as room temperature to 150 ℃) sinter is transported into the bin of the vertical cooler, continuously flows from top to bottom under the action of gravity, is deposited in the tower of the vertical cooler via the feed pipe, opens the circulation fan, opens the nitrogen valve of the nitrogen pipeline and/or starts the flue gas producer (and opens the flue gas outlet valve of the flue gas producer), and gas circulates the system (i.e. the gas circulation pipeline) with nitrogen and/or flue gas with low oxygen content (oxygen content is preferably below 12%, more preferably below 5%) so that the oxygen content of the cooling gas circulated in the system (or the gas circulation pipeline) is below 15vol% (preferably below 12vol%, preferably below 8vol%, more preferably below 5 vol%). Preferably, in the pretreatment step (1 b), when the oxygen content of the cooling gas circulated in the system (or the gas circulation line) is less than 15vol% (preferably less than 12vol%, preferably less than 8vol%, more preferably less than 5 vol%), and (preferably after the system further passes through the gas circulation for 5 minutes to 20 hours, preferably 10 minutes to 5 hours), the nitrogen valve of the nitrogen line is closed and/or the flue gas generator is closed (and the flue gas outlet valve of the flue gas generator is closed), and at the start of discharging the cold sintered ore from the tower, the system is allowed to proceed to step (1), that is, the system is brought into a normal operation state (of adding the hot sintered ore) (i.e., into a low-oxygen full-circulation cooling state).

The above-mentioned supplying cooling gas to the air ring air supply device and the hood air supply device respectively means: and then the cooling gas is supplied to the wind ring wind supply device, the wind ring which is communicated with the wind ring wind supply device and is positioned at the side part of the tower body of the cooler, the wind cap wind supply device and the wind cap which is communicated with the wind cap wind supply device and extends into the tower body from the bottom of the tower body upwards.

Preferably, the cold air discharged from the waste heat boiler and the power generation system is conveyed by the first cold air duct and (again) dedusted by a second deduster (preferably a multi-pipe deduster) provided on the first cold air duct, and then conveyed to a cooling device (preferably a water-cooled cooling device) for further cooling, and the cold air discharged from the cooling device (preferably a water-cooled cooling device) is conveyed by the second cold air duct to an air supply device of the vertical cooler under suction of the circulating fan.

Preferably, the cold air collected in the sealed cowling device at the lower part of the vertical cooler is conveyed by the air supply pipeline (or the third cold air pipeline) of the sealed cowling device under the suction of the exhaust fan and is merged with the cold air in the second cold air pipeline at the upstream of the circulating fan.

Preferably, a temperature measuring probe is arranged above each discharge outlet correspondingly, and the control system controls the discharging speed of the corresponding discharge outlet or controls the operation of the corresponding discharge outlet according to the temperature detected by each temperature measuring probe.

The above method further comprises step (1 a) before step (1) (and before step 1 b): sinter discharged from the end of the sinter machine is crushed by a sinter crusher and then transported to the top bin of the vertical cooler using a hot sinter conveyor.

Preferably, the cold air discharged from the waste heat boiler and the power generation system is fed by the first cold air duct and (re) dedusted by the second deduster (preferably a multi-tube deduster) provided on the first cold air duct, and then fed to the cooling device (preferably a water-cooled cooling device) for further cooling. Preferably, the cold air discharged from the cooling device (preferably a water-cooled cooling device) is fed into the air supply device of the vertical cooler by the second cold air duct under suction of the circulating fan.

Preferably, the cold air collected in the sealed cowling device at the lower part of the vertical cooler is conveyed by the air supply pipeline (or the third cold air pipeline) of the sealed cowling device under the suction of the exhaust fan and is merged with the cold air in the second cold air pipeline or the first cold air pipeline at the upstream of the circulating fan.

Preferably, the control system controls the operation of the air ring air supply device, the hood air supply device, the adjusting rod, the cold sinter conveying device and the discharge outlet (or the discharge equipment) according to the temperature detected by the temperature measuring probe.

Preferably, a temperature measuring probe is arranged above each discharge outlet correspondingly, and the control system controls the discharging speed of the corresponding discharge outlet or controls the operation of the corresponding discharge outlet according to the temperature detected by each temperature measuring probe. Thereby controlling the material temperature in different areas in the cooling machine tower body to be in an expected or specified range.

Specifically, hot sinter crushed by a single-roller crusher is transported to the top of a vertical cooler by a hot sinter conveying device, enters the vertical cooler, continuously flows from top to bottom under the action of gravity, performs countercurrent heat exchange with cooling air from bottom to top in the vertical cooler, cools the sinter to a temperature below 150 ℃, is discharged onto a cold sinter conveying device by a discharging device at the lower part of the vertical cooler, and then transports the cooled sinter to the next process by the cold sinter conveying device.

Under the action of the circulating fan, cooling gas is supplied into the machine body from the air supply device of the vertical cooler at a certain pressure, passes through the sinter material layer from bottom to top, and performs countercurrent heat exchange with the sinter. The temperature of the cooling gas is gradually increased after heat exchange, and the cooling gas is discharged from the sinter level in the vertical cooler tower to form high-temperature hot air. The high-temperature hot air is discharged through a hot air outlet at the upper part of the vertical cooler. And the high-temperature hot air discharged from the vertical cooler enters a subsequent waste heat boiler and a power generation system after being dedusted by a primary dedusting system. After the waste heat power generation, the temperature of the high-temperature hot air is reduced to about 100-150 ℃, then the high-temperature hot air is cooled by a cooling device, and the high-temperature hot air is reduced to 20-150 ℃ and then is sent to an air inlet of a circulating fan for recycling.

The discharging device at the lower part of the vertical cooler can be a plate type ore feeder, a vibrating feeder or an electromagnetic vibrating feeder, and the discharging device has a certain degree of air leakage, so that the cooling gas needs to be supplemented when the air leakage occurs in the system. In order to realize the full circulation of the system, the process adopts a sealing device to seal a part of a discharging device and a part of a cold sinter conveying device at the lower part of the vertical cooler, collects the gas leaked from the discharging device, and then sends the gas into an air inlet of a circulating fan by using a sealing fan for recycling.

The cooling device in the process cools the hot air after waste heat power generation to 20-150 ℃, and then sends the hot air into the air inlet of the circulating fan for recycling. This is a necessary condition to ensure that the sinter can be cooled to below 150 ℃. The cooling device can adopt a water cooling mode, and the replaced hot water can be used for preheating circulating water of the waste heat boiler or directly providing hot water.

The dust removing system in the process can be divided into primary dust removing and secondary dust removing. The primary dust removal is arranged between the vertical cooler and the waste heat boiler and is used for removing hot air dust from the vertical cooler, and an impact plate type gravity dust remover can be adopted. The secondary dust removal is positioned between the waste heat boiler and the circulating fan, and a multi-pipe dust remover can be adopted.

The cold sinter conveying device in the process can be a belt conveyor or a chain plate conveyor.

In addition, the process of the invention belongs to a low-oxygen full-circulation cooling process. The burning of carbon residue in the sinter produces liquid phase in the sinter as the main cause of blocking the agglomeration in the cooler, and in order to prevent the agglomeration in the cooler, a low-oxygen full-circulation cooling process is developed.

The invention provides a method for preventing agglomeration in a cooler. Through theoretical analysis, when the oxygen content in the cooling gas is lower than a certain value, the carbon residue is burnt to hardly generate liquid phase in the sinter, so that the sinter is not agglomerated into a large block, and the value is called a safe oxygen level. This value is preferably below 18%, more preferably below 12%. Therefore, controlling the oxygen content in the full circulation cooling gas at a safe oxygen level is the fundamental method for preventing caking in the cooler.

The method or process of the present invention generally comprises the following two stages:

1. the initial safe oxygen site generation method comprises the following steps:

before the cooling system starts to operate, firstly, a safe oxygen position environment is generated in the system, and the specific method is as follows: firstly, a circulating fan is started, then a flue gas producer and/or a nitrogen pipeline and a valve are opened, flue gas with low oxygen content (the oxygen content is preferably lower than 12%, and more preferably lower than 5%) and/or nitrogen are introduced into the system, after a few hours of circulation, the oxygen content in the system is at a safe oxygen level, and at the moment, the flue gas producer and/or the nitrogen can be shut down for subsequent operation.

2. Normal production safety oxygen position maintaining method

After the initial safe oxygen level production, the system starts to operate normally, because the system is in full circulation operation, but a certain amount of air leaks into the system, and the oxygen content of the air is higher. However, the leakage amount of air is small, and compared with the safe oxygen position, the abundant oxygen contained in the air reacts with carbon residue in the sinter to be consumed. Through calculation, when the system air leakage rate is 1000Nm ³ And/h, only the residual carbon content in the sinter is about 0.01 percent, so that the rich oxygen leaked into the air can be consumed, and the oxygen content in the circulating gas of the system is not increased. Through detection, the carbon residue content in the sintered ore after the original circular cooler is cooled is about 0.1%, so that the oxygen content in the system cannot be increased during normal production after the initial safe oxygen production, thereby ensuring that the cooler cannot generate large blocks and block the tower body.

Principle and characteristics of the process

Compared with the cooling process of a circular cooler, the process reduces the cooling air quantity of the ore per ton, improves the thickness of a material layer, prolongs the cooling time, and ensures that the ore to be cooled continuously flows from top to bottom under the action of gravity and performs countercurrent heat exchange with cooling air from bottom to top in the vertical cooler. According to the cooling mode, the temperature of hot air discharged from the upper part of the vertical cooler is greatly improved compared with that of hot air discharged from the original annular cooler, and all hot air can be applied to waste heat power generation, and only less than 50% of hot air discharged from the original annular cooler can be used in a waste heat power generation system, so that the sensible heat recovery rate of the sintered ore is greatly improved.

The process is a full circulation cooling process. The hot air exhausted by the vertical cooler enters the vertical cooler for cyclic utilization after passing through the dust removal system, the waste heat boiler, the power generation system, the cooling device and the circulating fan. And the air leakage at the discharging device at the lower part of the vertical cooler is sealed by the sealing device and then is sent to the air inlet of the circulating fan through the sealing fan for recycling. Therefore, the process is a full-circulation cooling process, the system has no air leakage, the cooling air entering the vertical cooler can be completely used for cooling, the heat brought by the cooling air from the sinter can be completely utilized, and the air leakage rate of the original annular cooler is very high, so that the energy waste is caused.

Because the process is a low-oxygen full-cycle process flow, after the initial safe oxygen level production, circulating gas in the system can be always in a safe oxygen level environment, and the phenomenon of blocking equipment caused by agglomeration of sinter is avoided.

The beneficial technical effects of the invention

1. The cooling gas circulates entirely, with "zero" emissions.

2. The oxygen content in the cooling gas is low (which is a fraction of air), so that the secondary sintering of the hot sinter at the upper part of the tower body is reduced, and caking is avoided.

3. The heat recovery efficiency is high.

4. The number of fans is reduced, and electric energy is saved.

5. The cooling gas collected in the sealed enclosure is recirculated back through the less powerful suction fan.

In addition, the process has the characteristics of low cooling speed of the sinter, small ton consumption cooling air quantity, relatively small waste gas quantity, high waste gas temperature, high heat efficiency of the boiler, capability of completely utilizing the cooling waste gas by the boiler and general sensible heat recovery rate of the sinter up to about 70 percent. In addition, the process can also overcome the problem of secondary sintering of the sinter in the vertical cooling device and prevent the blockage phenomenon of the vertical cooling device.

The device has the advantages of uniform material distribution, uniform material discharge and uniform air distribution. The regional discharging adjusting function can be performed according to the cooling effect, so that the cooling machine has good cooling effect and high hot air temperature, and meets the requirements of the sintering ore countercurrent thick material layer cooling process.

Compared with the annular cooler in the prior art, the vertical cooler has the advantages of simple structure, reliable sealing, no air leakage, small equipment maintenance amount and high waste heat recovery efficiency. The sensible heat recovery rate of the sinter can reach about 70 percent.

1. The vertical cooler has simple structure, reduces equipment investment and reduces the operation cost of equipment;

2. The device has good tightness, the heat recovery efficiency of the sinter is high, high-temperature waste gas (hot air) is obtained for generating steam, the high-temperature steam is used for generating electricity, and the electricity generation efficiency is higher;

3. the discharging is free from blocking, and the frequency of shutdown and maintenance is obviously reduced;

4. by detecting the temperature of the material above each discharge outlet, the opening degree or the opening and closing of each discharge outlet can be independently controlled, and the sintering ore temperature in different areas can be ensured to be within a specified range.

Description of the drawings:

FIG. 1 is a schematic diagram of a sinter low oxygen full cycle cooling process of the invention (wherein a plate feeder discharge type vertical cooler is used);

FIG. 2 is a flow chart of the cooling process of the vertical cooler (A1) with multiple gate discharge according to the present invention;

FIG. 3 is a flow chart of the cooling process of the vertical cooler (A2) with a plurality of discharge cones discharging;

FIG. 4 is a schematic view of the structure of the shutter discharging type vertical cooler (A1) of the present invention;

FIG. 5 is a schematic diagram of the structure of the air ring and air ring air supply device of the shutter discharging type vertical cooler (A1) of the invention;

FIG. 6 is a schematic diagram of a hood and a hood air supply device of the shutter discharging type vertical cooler (A1) of the present invention;

FIG. 7 is a view showing the layout of a discharge cone of the shutter discharging type vertical cooler (A1) of the present invention;

FIG. 8 is a view showing a layout of a discharge gate of the shutter discharge type vertical cooler (A1) of the present invention;

FIG. 9 is a schematic diagram of a control system of the shutter discharging type vertical cooler (A1) of the present invention;

FIG. 10 is a schematic structural view of a discharge type vertical cooler (A3) of the plate feeder of the present invention;

FIG. 11 is a schematic view of the structure of a vertical cooler (A2) with multiple discharge cones discharging according to the present invention;

FIG. 12 is a schematic view of the structure of the air ring and air ring air supply device of the cooler (A2) of the present invention;

FIG. 13 is a schematic view showing the structure of a hood and a hood air supply device of the cooler (A2) of the present invention;

FIG. 14 is a view showing the arrangement of the discharge cone of the cooler (A2) according to the present invention;

FIG. 15 is a diagram of an adjusting rod arrangement of the cooler (A2) of the present invention;

FIG. 16 is a schematic view of a mechanism of a double-deck vibratory feeder of the cooler (A2) of the present invention provided with two vibrators;

FIG. 17 is a schematic diagram of a mechanism of a double-deck vibratory feeder provided with a vibrator of the cooler (A2) of the present invention;

FIG. 18 is a schematic diagram of the control system of the cooler (A2) according to the present invention;

FIG. 19 is a schematic diagram of a layout of a panel feeder of the present invention;

FIG. 20 is a schematic diagram of a control system of a discharge type vertical cooler (A3) of a plate feeder according to the present invention;

FIG. 21 is a diagram of a temperature probe arrangement of the present invention;

fig. 22 is a schematic structural view of the hood according to the present invention.

Reference numerals: a1: a plurality of flashboard discharge type vertical coolers; a2: a plurality of discharge cone hoppers discharge type vertical coolers; a3: discharging type vertical cooler of plate type ore feeder; 1: a storage bin; 2: a material distribution pipe; 3: a top cover; 4: a tower wall; 4a: a tower wall transition section; 5: a plurality of flashboard discharge type vertical coolers A1 are provided with a tower cone (inverted cone cylinder or inverted cone cylinder); 5a or E: a discharge outlet; 5b: discharge outlet seal cover, 5T: a discharge cone hopper of the vertical cooler A2 or A3; 6 or 6T: an air ring air supply device of the vertical cooler A1, A2 or A3; 601 or 601T: an air ring air duct of the vertical cooler A1, A2 or A3; 602 or 602T: an air circulation pipe of the vertical cooler A1, A2 or A3; 7 or 7T: hood air supply device of vertical cooler A1 or A2 or A3; 701 or 701T: a hood branch pipe of a hood air supply device; 702 or 702T: a hood air duct of the hood air supply device; 703 or 703T: a hood air pipe of the hood air supply device; 8: a hot air outlet of the tower body of the vertical cooler A1, A2 or A3; 9: a temperature measurement probe; 10: a discharge channel (e.g., a discharge chute or hopper or bin) of the vertical cooler A1; 10T: an adjusting rod in a discharge cone of the vertical cooler A2 or A3; 11: a cold sinter conveying device; 12: a discharge gate at the discharge outlet of the vertical cooler A1; 12T: a plate feeder; d: the bottom of the vertical cooler A1. 13: a nitrogen pipeline with a nitrogen valve; 13T: a discharge chute or hopper; 14: an air line with a make-up valve; 15: a flue gas producer; 16: and (5) diffusing the chimney.

P: discharging equipment of the vertical cooler A2; p01: a body support; p02: an upper layer vibration tank; p03: a lower layer vibration tank; p04: a vibrator; p0401: an upper vibrator; p0402: a lower vibrator; p05: an adjusting device;

h: a wind ring; m: a hood; m01: a support frame of the hood; m02: a top cover of the hood; m03: a conical cover plate of the hood; m04: an air pipe (or a stem) of the hood;

h1: lower bed height; h2: the height of the upper material layer; b01: a sintering machine; and B02: a crusher; b03: a hot sinter conveying device; b04: a first dust collector; b05: waste heat boiler and power generation system; b06: a second dust collector; b07: a cooling device (water cooling); and B08: an air supply device of the vertical cooler; b09: a sealing cover device at the lower part of the vertical cooler; b10: a circulating fan; b11: sealing the hood exhaust fan; l0: a hot air duct; l1: a first cold air duct; l2: a second cold air duct; l3: sealing device air supply pipeline; e: a discharge outlet or a discharge port.

Detailed Description

According to a first embodiment of the present invention, as shown in fig. 1 to 3, there is provided a sinter cooling and waste heat utilization system comprising a vertical cooler, a first dust collector (preferably an impact plate gravity dust collector) B04, a waste heat boiler and power generation system B05, a cooling device (preferably a water-cooled cooling device) B07, and a sealing hood device B09 provided at a lower portion of the vertical cooler, wherein a hot air outlet 8 is provided at an upper portion or a top cover of the vertical cooler, an air supply device B08 is provided at a middle portion and a discharge port(s) E is provided at a bottom portion,

The hot air outlet 8 of the vertical cooler is connected with a hot air inlet of the waste heat boiler and the power generation system B05 through a hot air pipeline L0, the first dust remover B04 is arranged on the hot air pipeline L0, a cold air outlet of the waste heat boiler and the power generation system B05 is connected to an air inlet of a cooling device (preferably a water-cooled cooling device) B07 through a first cold air pipeline L1, an air outlet of the cooling device (preferably the water-cooled cooling device) B07 is connected to an air supply device B08 of the vertical cooler through a second cold air pipeline L2, and a circulating fan B10 is arranged on the first cold air pipeline L1 or the second cold air pipeline L2; and

the seal cover device B09 is disposed at the discharge outlet E or 5a of the lower portion of the vertical cooler, and an air outlet of the seal cover device B09 is connected to a front section of the first cool air duct L1 or to a front section of the second cool air duct L2 (e.g., connected to the second cool air duct L2 and located between the cooling device B07 and the circulating fan B10) via a seal cover device air supply duct (or third cool air duct) L3;

preferably, the sealing hood device air supply duct L3 is provided with an exhaust fan B11.

Optionally or optionally, a second dust separator (preferably a multi-tube dust separator) B06 is provided on the first cold air line L1. Preferably, a second dust collector (preferably a multi-tube dust collector) B06 is provided on the first cool air duct L1.

A nitrogen line 13 with a nitrogen valve and an air supply line 14 with a gas supply valve are connected to the first air line L1 (for example, the middle and rear section thereof) or to the second air line L2.

A flue gas generating furnace 15 is provided on the hot air duct L0 upstream or downstream of the first dust collector B04 (i.e., an air outlet of the furnace is connected to the hot air duct L0).

Preferably, a blow-down chimney 16 is provided at the top of the tower of the vertical cooler, such as the tower roof.

In general, a vertical cooler has a silo 1 and a distribution pipe 2 at the top thereof.

Preferably, the number of the discharge outlets E or 5a in the lower part of the vertical cooler is 4 to 12, preferably 6 to 10, 6 to 8.

The air supply means B08 comprises an air ring air supply means 6 or 6T and an air cap air supply means 7 or 7T. More specifically, the air supply means B08 includes an air ring air supply means 6 or 6T and an air ring H located on the side of the cooler tower body in communication with the air ring air supply means 6 or 6T, and an air cap air supply means 7 or 7T and an air cap M extending upward into the tower body from the bottom (preferably, bottom center position) of the tower body in communication with the air cap air supply means 7 or 7T.

The sealing cover device B09 is a single cover body or an integral cover body which seals all the discharging outlets 5a or E, the lower part of the cover body is provided with a discharging hole, and the lower part of the discharging hole is provided with a cold sinter conveyor 11, as shown in figure 1; alternatively, the above-described sealing cap device B09 is a single cap or an integral cap sealing all of the discharge outlets 5a or E and the starting end of the cold sinter conveyor 11, as shown in fig. 2 or 3. The sealed-cover device B09 is used for collecting the air or cold air exhausted or leaked from all the exhaust outlets 5a or E of the cooler and conveying and circulating the air into the cooler through the air supply pipeline L3 of the sealed-cover device, so that basically all cooling air or cooling air circulates in the system, namely, the full circulation is formed, and the oxygen content in the cooling air entering the tower body of the cooler is greatly reduced, and secondary sintering of high-temperature sinter is avoided.

The sinter cooling and waste heat utilization system further comprises: upstream of the vertical cooler, a sinter machine B01, a sinter breaker B02, and a hot sinter conveyor B03 (for conveying hot sinter to the top of the vertical cooler).

Preferably, the vertical cooler is a plurality of shutter discharging type vertical coolers A1 as shown in figure 4 or a plurality of discharging cone hoppers discharging type vertical coolers A2 as shown in figure 11; or a plate feeder discharge type vertical cooler A3 as shown in FIG. 10.

As shown in fig. 4 to 9 and fig. 21 and 22, the multiple shutter discharging type vertical cooler A1 includes: the device comprises a storage bin 1, a distributing pipe 2, a tower body consisting of a tower body top cover 3, a tower wall 4, a tower body cone 5 positioned below the tower wall 4 and a tower bottom D, a wind ring H, a wind cap M, a plurality of discharging outlets 5a or E arranged at the lower part of the tower body cone 5 and a hot air outlet 8 arranged at the upper part of the tower wall 4 or on the tower body top cover 3;

wherein the top cover 3 is fixedly connected with the upper end of the tower wall 4, the stock bin 1 is arranged above the top cover 3, the upper end of the material distribution pipe 2 is connected with the bottom of the stock bin 1, the lower end of the material distribution pipe 2 extends into the lower part of the top cover,

the plurality of discharge outlets 5a are annularly distributed around the lower part of the tower body cone 5 or the plurality of discharge outlets 5a or E are uniformly distributed along the circumferential direction of the lower part of the tower body cone 5,

a fixed gap of a circle is formed between the lower part of the tower wall 4 and the top of the tower cone 5 as a wind ring H,

a hood M extending upwards into the inner space of the tower body is arranged at the central position of the tower bottom D, and

a discharge gate or shutter 12 is provided at each discharge outlet 5a or E, respectively, and a discharge passage 10 is provided below the discharge gate 12; preferably, the discharge channel 10 is a discharge chute corresponding to each discharge outlet 5a or the discharge channel 10 is a discharge hopper (of unitary design).

In general, in the multiple-shutter discharging type vertical cooler A1, the hood M is extended into the inner space of the tower body so that the height of the hood air duct (i.e., the stem portion of the hood) is enough to reach the height of the wind ring H.

Preferably, a cold sinter conveyor 11 is provided at or below the end of the discharge path 10, for example at the end of a discharge chute or below a discharge hopper.

Preferably, in the multiple-sluice vertical cooler A1, a tower wall transition section 4a is further provided at the lower part or below the tower wall 4 and above the tower cone 5. Thus, the tower cone can be more conveniently installed at the lower part of the tower wall. In this case, the tower is formed by a tower top cover, a tower wall and a lower (inverted conical or inverted conical) tower wall transition. The tower wall transition section assumes an inverted conical or inverted conical cylindrical shape, i.e., its lower portion has an inner diameter smaller than its upper portion. May also be referred to as a transition bucket or as an upper cone bucket. The cone angle of the inverted or inverted cone-shaped tower wall transition is typically 60-75 degrees, preferably >63.5 degrees.

Optionally or optionally, a discharge outlet seal cap 5b is provided at each discharge outlet 5a or E in the lower part of the tower cone 5.

Preferably, the vertical cooler A1 with multiple gate plates for unloading further comprises an air ring air supply device 6, the air ring air supply device 6 comprises an air ring air duct 601 and an air ring air duct 602 connected to the air ring air duct 601, and the air ring air duct 601 surrounds the air ring H and is communicated with the air ring H.

Preferably, the vertical cooler A1 with multiple gate plates for unloading further comprises a hood air supply device 7, wherein the hood air supply device 7 comprises multiple hood branch pipes 701, an annular or 'C' -shaped hood air duct 702 and a hood air duct 703 connected with the hood air duct 702, one end of each hood branch pipe 701 is communicated with the hood air duct 702, and the other end is communicated with the bottom or stem of the hood M. The stem is here depicted as a hood air duct M04. The hood duct 703 is connected to a blower for supplying air to the hood duct 702.

Preferably, a temperature measuring probe 9 is arranged at the lower part of the tower wall 4; preferably, the temperature measuring probe 9 is a thermocouple temperature sensor.

In general, the air supply device B08 includes an air ring H and an air ring air supply device 6, and a hood M and a hood air supply device 7.

Preferably, the number of the discharge outlets 5a or E at the lower part of the tower cone 5 is 4 to 12, preferably 6 to 10, 6 to 8.

In general, in the multiple-shutter discharging type vertical cooler A1, the number of hood branches 701 is 1 to 12, preferably 2 to 10, more preferably 4 to 8, and still more preferably 6 to 8; preferably, the hood branch 701 is connected (e.g., bent down to) to the bottom of the hood M or to the stem of the hood M through the wall of the tower cone 5 (i.e., the hood air duct M04).

Preferably, the hood M includes a support frame M01, a hood top cover M02, a plurality of conical cover plates M03, and a hood air pipe (or a stem called a hood) M04, wherein the plurality of conical cover plates M03 are sequentially arranged on the support frame M01, and the diameters of the bottoms of the conical cover plates M03 are sequentially increased from top to bottom; the hood top cover M02 is arranged above the topmost conical cover plate M03, and the air pipe M04 is arranged below the support frame M01 and connected with the support frame M01; preferably, the hood top cover M02 has a tapered structure.

Preferably, as shown in fig. 9, the multiple shutter discharging type vertical cooler A1 further comprises a control system K, wherein the control system K is connected with the air ring air supply device 6, the hood air supply device 7, the temperature measuring probe 9, the discharging gate 12 and the cold sinter conveying device 11, and controls the operations of the air ring air supply device 6, the hood air supply device 7, the temperature measuring probe 9, the discharging gate 12 and the cold sinter conveying device 11.

As shown in fig. 11 to 18 and fig. 21 and 22, the multiple discharge cone discharge type vertical cooler A2 includes: the device comprises a storage bin 1, a distributing pipe 2, a tower body consisting of a tower body top cover 3 and a tower wall 4, a plurality of discharging cone hoppers 5T positioned below the tower wall 4, a wind ring H, a wind cap M and a hot air outlet 8 arranged on the upper part of the tower wall 4 or on the tower body top cover 3;

the plurality of discharge cone hoppers 5T are annularly distributed at the lower end of the tower wall 4 or uniformly distributed along the circumferential direction,

A fixed gap of one circle is formed between the lower part of the tower wall 4 and the tops of the plurality of discharge cone hoppers 5T as a wind ring H,

a hood M extending upwards into the space in the tower body is arranged at the bottom center position of the tower body, and

a discharging device P is arranged below the discharging outlet E of each discharging cone hopper 5T.

In the application, the bottom of the tower body is composed of a hood M positioned at the center of the bottom and a plurality of discharge cone hoppers 5 distributed in a ring shape. That is, there is a round of discharge cone 5 at the lower part of the tower wall 4.

Preferably, the vertical cooler A2 with multiple discharge cones and hoppers further comprises an air ring air supply device 6T, wherein the air ring air supply device 6T comprises an air ring air duct 601T and an air ring air pipe 602T connected to the air ring air duct 601T, and the air ring air duct 601T surrounds and is communicated with the air ring H, as shown in fig. 12.

Preferably, the vertical cooler A2 with the plurality of discharge cone hoppers is further provided with a hood air supply device 7T, and the hood air supply device 7T comprises a plurality of hood branch pipes 701T, an annular or "C" shaped hood air duct 702T and a hood air duct 703 connected with the hood air duct 702T, wherein one end of each hood branch pipe 701T is communicated with the hood air duct 702T and the other end is communicated with the bottom of the hood M, as shown in fig. 13. The hood duct 703 is connected to a blower for supplying air to the hood duct 702T.

Preferably, a cold sinter conveyor 11 is provided below the end of the discharging device P.

Preferably, a (inverted conical cylindrical) tower wall transition section 4a is further provided at the lower or lower part of the tower wall 4 and above the discharge cone 5T. In this way, the discharge cone 5 is more conveniently installed in the lower part of the tower wall 4. In this case, the tower is formed by a tower top cover 3, a tower wall 4 and a lower (back-tapered) tower wall transition 4a. The tower wall transition section 4a has an inverted conical cylindrical shape, i.e. its lower portion has an inner diameter smaller than the inner diameter of its upper portion. May also be referred to as a transition bucket or as an upper cone bucket. The cone angle of the inverted cone-shaped tower wall transition section 4a is typically 60-75 degrees, preferably >63.5 degrees.

Preferably, the middle or lower part of the discharge cone 5T is provided with an adjusting rod 10T. The discharging speed of the discharging cone hopper 5T is adjusted by adjusting the depth of the adjusting rod inserted into the material layer.

A plurality of temperature probes 9 are provided at the lower part of the tower wall 4 or at the tower wall transition section 4a (preferably along its circumferential direction), preferably the temperature probes 9 are thermocouple temperature sensors.

In the vertical cooler A2 of the discharge type with a plurality of discharge cones, the air supply device B08 includes an air ring H and an air ring air supply device 6T, and an air cap M and an air cap air supply device 7T.

With the wind ring H as a division point, the height (or referred to as lower bed height) H1 of the discharge cone 5T is greater than the stacking height (or referred to as upper bed height) H2 of the tower wall 4.

Preferably, the number of the discharge cone hoppers 5T is 4 to 12, preferably 6 to 10, preferably 6 to 8.

Preferably, the number of hood branches 701T is 1 to 12, preferably 2 to 10, more preferably 4 to 8, and still more preferably 6 to 8. More preferably, each hood branch 701T is located in the gap between two adjacent discharge cones 5T, as shown in fig. 13.

Preferably, the hood M includes a support frame M01, a hood top cover M02, a plurality of tapered cover plates M03, and a hood air duct (also referred to as a stem portion of the hood) M04. Wherein a plurality of toper apron M03 set gradually on support frame M01, hood top cap M02 sets up the top at the toper apron M03 of top, and tuber pipe M04 sets up in the below of support frame M01 and is connected with support frame M01. Preferably, the hood top cover M02 has a tapered structure.

Preferably, an air flow channel is formed between the upper and lower adjacent conical cover plates M03.

Preferably, the cone angle of the hood top cover M02 is larger than the cone angle of the cone cover M03.

In the vertical cooler A2 of which the plurality of discharge cones are discharged, the discharging device P is a vibratory feeder. Preferably, the discharging device P is a double-layer vibrating feeder, and the double-layer vibrating feeder comprises a machine body bracket P01, an upper-layer vibrating groove P02, a lower-layer vibrating groove P03 and a vibrator P04; the upper layer vibration groove P02 and the lower layer vibration groove P03 are arranged on the machine body support P01, the upper layer vibration groove P02 is located above the lower layer vibration groove P03, and the upper layer vibration groove P02 and the lower layer vibration groove P03 are connected with the vibrator P04 respectively. Preferably, the upper vibration groove P02 and/or the lower vibration groove P03 is provided with an adjusting device P05, and the adjusting device P05 adjusts the inclination angle of the bottom plate of the lower vibration groove P03.

Preferably, the vibrator P04 includes an upper vibrator P0401 and a lower vibrator P0402, the upper vibrator P0401 is connected to the upper vibration groove P02, and the lower vibrator P0402 is connected to the lower vibration groove P03. Preferably, the upper vibration groove P02 and the lower vibration groove P03 are provided on the body bracket P01 by springs.

Preferably, the vertical cooler A2 with the discharging cone hoppers comprises a control system K, wherein the control system K is connected with the air ring air supply device 6T, the air cap air supply device 7T, the temperature measuring probe 9, the adjusting rod 10T, the cold sinter conveying device 11 and the discharging equipment P, and controls the operation of the air ring air supply device 6T, the air cap air supply device 7T, the temperature measuring probe 9, the adjusting rod 10T, the cold sinter conveying device 11 and the discharging equipment P, as shown in fig. 18.

In the present application, the tower wall 4 is a cylindrical or square barrel-like structure. I.e. the cross-section of the tower wall 4 is circular, elliptical, square or rectangular.

As shown in fig. 10, a discharge type vertical cooler A3 for a plate feeder, the discharge type vertical cooler A3 for a plate feeder includes: the device comprises a storage bin 1, a distributing pipe 2, a tower body consisting of a tower body top cover 3 and a tower wall 4, a plurality of discharging cone hoppers 5T positioned below the tower wall 4, a wind ring H, a wind cap M and a hot air outlet 8 arranged on the upper part of the tower wall 4 or on the tower body top cover 3;

a plate feeder 12T is arranged below each discharge cone 5T.

In the application, the bottom of the tower body is composed of a hood M positioned at the center of the bottom and a plurality of discharge cone hoppers 5T distributed in a ring shape. That is, there is a round of discharge cone 5T at the lower part of the tower wall 4.

Preferably, the unloading type vertical cooler A3 of the plate type ore feeder further comprises an air ring air supply device 6T. The air ring air supply device 6T includes an air ring air duct 601T and an air ring air duct 602T connected to the air ring air duct 601T, and the air ring air duct 601T surrounds and communicates with the air ring H (as shown in fig. 10).

Preferably, the unloading type vertical cooler A3 of the plate type ore feeder further comprises a hood air supply device 7T. The hood air supply device 7T includes a plurality of hood branch pipes 701T, an annular or "C" shaped hood air duct 702T, and a hood air duct 703T connected to the hood air duct 702T, one end of each hood branch pipe 701T being communicated with the hood air duct 702T and the other end being communicated with the bottom of the hood M.

Generally, a cold sinter conveyor 11 is arranged below the discharge opening of the plate feeder 12T. Preferably, it is: a discharge chute(s) 13T or a discharge hopper 13T (of unitary design) is/are arranged below the discharge opening of the plate feeder 12T, and a cold sinter conveyor 11 is arranged below the discharge chute 13T or discharge hopper.

Preferably, a tower wall transition section 4a is further provided at the lower or lower part of the tower wall 4 and above the discharge cone 5T. In this way, the discharge cone 5T is more conveniently installed in the lower part of the tower wall 4. In this case, the tower is formed by a tower top cover 3, a tower wall 4 and a lower (back-tapered) tower wall transition 4a. The tower wall transition section 4a has an inverted conical cylindrical shape, i.e. its lower portion has an inner diameter smaller than the inner diameter of its upper portion. May also be referred to as a transition bucket or as an upper cone bucket. The cone angle of the inverted cone-shaped tower wall transition section 4a is typically 60-75 degrees, preferably >63.5 degrees.

Preferably, a plurality of temperature probes 9 are provided at the lower part of the tower wall 4 or at the tower wall transition section 4a, preferably along its circumferential direction; preferably, the temperature measuring probe 9 is a thermocouple temperature sensor.

Preferably, in the unloading type vertical cooler A3 of the plate type ore feeder, the height h1 of the discharging cone hopper 5T is larger than the stacking height h2 of the tower wall 4.

In general, the number of the discharge cones 5T is 4 to 12, preferably 6 to 10, and 6 to 8. The cross sections of the tops of the discharge cones 5 abut each other to form a ring.

Preferably, the number of the hood branch pipes 701T is 1-12, preferably 2-10, more preferably 4-8, and even more preferably 6-8; preferably, each hood branch 701T is located in the gap between two adjacent discharge cones 5.

Preferably, the hood M includes a support frame M01, a hood top cover M02, a plurality of cone-shaped cover plates M03, and a hood air pipe M04, wherein the cone-shaped cover plates M03 are sequentially arranged on the support frame M01, the hood top cover M02 is arranged above the topmost cone-shaped cover plate M03, and the air pipe M04 is arranged below the support frame M01 and connected with the support frame M01; preferably, the hood top cover M02 has a tapered structure.

Generally, an air flow channel is formed between the upper and lower adjacent conical cover plates M03.

The cone angle of the hood top cover M02 is larger than that of the cone-shaped cover plate M03. The blast cap M is located at the center of the bottom of the tower body and extends upwards into the tower body, so that the length of the air inlet path is consistent with the form of the material stacking thickness in the tower body, and the air flow resistance of different parts is ensured to be approximately consistent.

The application adopts the plate feeder 12T to discharge, and the discharging equipment can well control the discharging speed.

Preferably, the discharging type vertical cooler A3 of the plate type ore feeder further comprises a control system K, wherein the control system K is connected with the air ring air supply device 6T, the air cap air supply device 7T, the temperature measuring probe 9, the adjusting rod 10T, the cold sinter conveying device 11 and the plate type ore feeder 12T, and controls the operation of the air ring air supply device 6T, the air cap air supply device 7T, the temperature measuring probe 9T, the adjusting rod 10, the cold sinter conveying device 11 and the plate type ore feeder 12T.

The chute as a discharge channel has a width of, for example, 1 meter and a height of 9 meters.

According to a second embodiment of the present application, there is also provided a sinter low-oxygen full cycle cooling method or a sinter low-oxygen full cycle cooling method using the above-described sinter cooling and waste heat utilization system, the method comprising the steps of:

(1) Hot sinter from the sintering machine enters a feed bin 1 of the vertical cooler, continuously flows from top to bottom under the action of gravity, and is piled in a tower body of the vertical cooler through a distributing pipe 2;

(2) The air supply device B08 of the vertical cooler, namely, the air ring air supply device 6 or 6T and the air cap air supply device 7 or 7T respectively convey circulating (namely, circulating in the system) cooling gas (such as air, flue gas, cold air or mixed gas of air and nitrogen) with low oxygen content (such as less than 15vol%, preferably less than 12vol%, preferably less than 8vol%, and more preferably less than 5 vol%) into the tower body through the air ring H and the air cap M, the cooling gas passes through the sinter material layer piled in the tower body from bottom to top and carries out countercurrent heat exchange with the sinter, the temperature of the cooling gas is gradually increased after the heat exchange, the cooling gas is discharged through the sinter material surface in the tower body of the vertical cooler to form high-temperature hot air, and the high-temperature hot air is discharged through the hot air outlet 8;

(3) The high-temperature hot air discharged from the hot air outlet 8 is conveyed through a hot air pipeline L0 and enters the waste heat boiler and the power generation system B05 for waste heat utilization after being dedusted by a first deduster (preferably an impact plate type gravity deduster) B04, cold air discharged from the waste heat boiler and the power generation system B05 is conveyed to a cooling device (preferably a water-cooled cooling device) B07 by a first cold air pipeline L1 for further cooling, and cold air discharged from the cooling device (preferably the water-cooled cooling device) B07 is conveyed to an air supply device B08 of the vertical cooler by a second cold air pipeline L2 for further supplying cooling air to an air ring air supply device 6 or 6T and an air cap air supply device 7 or 7T respectively;

(4) Sinter deposited in the tower body of the cooler is cooled by countercurrent heat exchange with cooling gas flowing from bottom to top, and discharged onto the cold sinter conveyor 11 through the discharge outlet 5a or E of the lower part of the vertical cooler (for example, discharged onto the cold sinter conveyor 11 through the discharge outlet 5a or E of the tower cone 5 or the discharge cone hopper 5T of the lower part of the vertical cooler); and

(5) The cold air collected in the seal cover device B09 at the lower part of the vertical cooler is transferred through the seal cover device air supply duct (or the third cold air duct) L3 and is merged with the cold air in the second cold air duct L2 or the first cold air duct L1.

Preferably, the method further comprises, prior to step (1):

(1b) Pretreatment: the circulation fan B10 is turned on, the nitrogen valve of the nitrogen line is opened and/or the flue gas generator is started (and the flue gas outlet valve of the flue gas generator is opened), and the nitrogen and/or low-oxygen flue gas (preferably having an oxygen content of less than 12%, more preferably less than 5%) is introduced into the system (i.e. the gas circulation line) so that the oxygen content of the cooling gas circulated in the system (or the gas circulation line) is less than 15vol% (preferably less than 12vol%, preferably less than 8vol%, more preferably less than 5%).

Alternatively, the method further comprises, prior to step (1):

(1b) Pretreatment: the cold (e.g. temperature below 150 ℃, such as room temperature to 150 ℃) sinter is transported into the silo 1 of the vertical cooler, continuously flows from top to bottom under the action of gravity, is deposited in the tower of the vertical cooler via the feed pipe 2, opens the circulation fan B10, opens the nitrogen valve of the nitrogen pipeline and/or starts the flue gas producer (and opens the flue gas outlet valve of the flue gas producer), and gas circulates the system (i.e. the gas circulation pipeline) with nitrogen and/or low-oxygen flue gas (oxygen content is preferably below 12%, still preferably below 5%) so that the oxygen content of the cooling gas circulating in the system (or the gas circulation pipeline) is below 15vol% (preferably below 12vol%, preferably below 8vol%, still preferably below 5%). Preferably, in the pretreatment step (1 b), when the oxygen content of the cooling gas circulated in the system (or the gas circulation line) is less than 15vol% (preferably less than 12vol%, preferably less than 8vol%, more preferably less than 5 vol%), and (preferably after the system further passes through the gas circulation for 5 minutes to 20 hours, preferably 10 minutes to 5 hours), the nitrogen valve of the nitrogen line is closed and/or the flue gas generator is closed (and the flue gas outlet valve of the flue gas generator is closed), and at the start of discharging the cold sintered ore from the tower, the system is allowed to proceed to step (1), that is, the system is brought into a normal operation state (of adding the hot sintered ore) (i.e., into a low-oxygen full-circulation cooling state).

When introducing nitrogen and/or low oxygen flue gas (oxygen content preferably below 12%, more preferably below 5%) into the system, the high oxygen gas in the system is replaced by opening the stack 16 for (low oxygen) gas recycling.

At the time of the system entering the normal operation state, a small amount of nitrogen and/or low oxygen content flue gas (oxygen content is preferably lower than 12%, still preferably lower than 5%) is occasionally or intermittently introduced into the system.

The above-described supply of cooling gas to the wind ring wind supply device 6 or 6T and the wind cap wind supply device 7 or 7T, respectively, in turn means: further, cooling gas is supplied to the wind ring wind supply device 6 or 6T, the wind ring H positioned on the side of the tower body of the cooler and communicated with the wind ring wind supply device 6 or 6T, the wind cap wind supply device 7 or 7T, and the wind cap M extending into the tower body from the bottom of the tower body and communicated with the wind cap wind supply device 7 or 7T.

Preferably, the cold air discharged from the exhaust-heat boiler and the power generation system B05 is fed by the first cold air duct L1 and (again) dedusted by the second deduster (preferably a multitube deduster) B06 provided on the first cold air duct L1, and then fed to the cooling device (preferably a water-cooled cooling device) B07 for further cooling, and the cold air discharged from the cooling device (preferably a water-cooled cooling device) B07 is fed by the second cold air duct L2 to the air supply device B08 of the vertical cooler under suction of the circulation fan B10.

Preferably, the cool air collected in the sealed cowling device B09 at the lower portion of the vertical cooler is delivered through the sealed cowling device air supply duct (or third cool air duct) L3 under suction of the suction fan B11 and merges with the cool air in the second cool air duct L2 upstream of the circulation fan B10.

Preferably, a temperature measuring probe 9 is disposed above each discharge outlet E corresponding thereto, and the discharge speed of the corresponding discharge outlet E or the operation of the corresponding discharge outlet E is controlled by the control system K according to the temperature detected by each temperature measuring probe 9.

The above method further comprises step (1 a) before step (1) (and before step 1 b): the sinter discharged from the end of the sinter machine B01 is crushed by the sinter crusher B02, and then conveyed into the top bin 1 of the vertical cooler by the hot sinter conveying apparatus B03.

Preferably, the cold air discharged from the exhaust-heat boiler and the power generation system B05 is fed by the first cold air duct L1 and is (again) dedusted by a second deduster (preferably a multi-tube deduster) B06 provided on the first cold air duct L1, and then fed to a cooling device (preferably a water-cooled cooling device) B07 for further cooling. Preferably, the cool air discharged from the cooling device (preferably, a water-cooled cooling device) B07 is sent to the air supply device B08 of the vertical cooler by the second cool air duct L2 under suction of the circulation fan B10.

Preferably, the cold air collected in the sealed cowling device B09 at the lower portion of the vertical cooler is delivered through the sealed cowling device air supply duct (or third cold air duct) L3 under suction of the suction fan B11 and merges with the cold air in the second cold air duct L2 or the first cold air duct L1 upstream of the circulation fan B10.

Preferably, the control system K controls the operation of the wind ring wind supply device 6 or 6T, the hood wind supply device 7 or 7T, the adjusting bar 10T, the cold sinter transport device 11, the discharge outlet E (or the discharge apparatus P) according to the temperature detected by the temperature measuring probe 9.

Preferably, a temperature measuring probe 9 is disposed above each discharge outlet E corresponding thereto, and the discharge speed of the corresponding discharge outlet E or the operation of the corresponding discharge outlet E is controlled by the control system K according to the temperature detected by each temperature measuring probe 9. Thereby controlling the material temperature in different areas in the cooling machine tower body to be in an expected or specified range.

Example 1

The height of the tower body of the cooler A3 consisting of the top cover and the tower wall is 9 meters, and the outer diameter of the tower body is 13 meters. The diameter of the hood was 2.5 meters. The inner diameter of the wind ring is about 11 meters.

The daily handling capacity of the sinter was 8700 tons/day. The temperature of the sinter before entering the storage bin is about 700 ℃, and the temperature of the hot air at the hot air outlet 8 reaches about 500 ℃. The recovered heat was used for power generation, and the generated power was about 34 degrees.

Compared with the ring cooler in the prior art, the ring cooler has the advantages that: the technology of the invention can provide hot air with higher temperature for generating high-temperature steam, and remarkably improves the power generation efficiency because of better tightness.

The process can also overcome the problem of secondary sintering of the sinter in the vertical cooling device and prevent the blockage phenomenon of the vertical cooling device. The device runs for 6 months, and the problem of blockage is avoided.

The cooling gas is fully circulated, the oxygen content in the cooling gas entering the tower body is obviously reduced (which is a fraction or even a fraction, such as 7vol percent, of the oxygen content in the air), and secondary sintering of the high-temperature sinter is avoided.

Example 2

The height of the tower body of the cooler A1, which consists of the top cover and the tower wall, is 9 meters. The outer diameter of the tower body is 13 meters. The diameter of the hood was 2.5 meters. The height of the tower cone 5 is 5.5 meters. The inner diameter of the wind ring is 10.5 meters.

The daily handling capacity of the sinter was 8650 tons/day. The temperature of the sinter before entering the storage bin is 700 ℃, and the hot air temperature of the hot air outlet 8 reaches 500 ℃. The recovered heat was used for power generation, and the generated power was about 35 degrees.

The cooling gas is fully circulated, the oxygen content in the cooling gas entering the tower body is obviously reduced (which is a fraction or even a fraction, such as 5vol percent, of the oxygen content in the air), and secondary sintering of the high-temperature sinter is avoided.

Example 3

The height of the tower body of the cooler A2 consisting of the top cover and the tower wall is 9 meters, and the outer diameter of the tower body is 13 meters. The height of the discharge cone hopper is 7 meters. The diameter of the hood was 2.5 meters. The inner diameter of the wind ring is about 11 meters.

The daily handling capacity of the sinter was 8600 tons/day. The temperature of the sinter before entering the storage bin is about 700 ℃, and the temperature of the hot air at the hot air outlet 8 reaches about 500 ℃. The recovered heat was used for power generation, and the generated power was about 34 degrees.

Example 4

The low-oxygen full-circulation cooling method for the sinter comprises the following steps:

(1b) Pretreatment: cold sinter with the temperature lower than 150 ℃ is conveyed into a feed bin 1 of the vertical cooler, continuously flows from top to bottom under the action of gravity, is accumulated in a tower body of the vertical cooler through a material distribution pipe 2, a circulating fan B10 is started, a nitrogen valve of a nitrogen pipeline is opened, nitrogen is introduced into a system (namely a gas circulating pipeline) for gas circulation, and the oxygen content of cooling gas circulating in the system (or the gas circulating pipeline) is lower than 8vol%.

When the oxygen content of the cooling gas circulated in the system (or the gas circulation line) is less than 8vol% (more preferably less than 5 vol%), after the system further passes through the gas circulation for 30 minutes, the nitrogen valve of the nitrogen line is closed and/or the flue gas producer is closed (and the flue gas outlet valve of the flue gas producer is closed), and when the discharge of cold sinter from the inside of the tower is started, the system is allowed to proceed to step (1), i.e., the system is allowed to enter a normal operation state (in which hot sinter is added) (i.e., enters a low-oxygen full-circulation cooling state).

(2) The air supply device B08 of the vertical cooler, namely, the air ring air supply device 6 or 6T and the air cap air supply device 7 or 7T respectively convey circulating (namely, circulating in the system) cooling gas (such as air or mixed gas of air and nitrogen) with low oxygen content (for example, less than 8vol percent and more preferably less than 5 vol percent) into the tower body through the air ring H and the air cap M, the cooling gas passes through a sinter material layer accumulated in the tower body from bottom to top, and carries out countercurrent heat exchange with the sinter, the temperature of the cooling gas is gradually increased after the heat exchange, the cooling gas is discharged through the sinter material surface in the tower body of the vertical cooler to form high-temperature hot air, and the high-temperature hot air is discharged through the hot air outlet 8;

(3) The high-temperature hot air discharged from the hot air outlet 8 is conveyed through a hot air pipeline L0 and enters the waste heat boiler and the power generation system B05 for waste heat utilization after being dedusted by a first deduster (namely an impact plate type gravity deduster) B04, cold air discharged from the waste heat boiler and the power generation system B05 is conveyed to a cooling device (namely a water-cooled cooling device) B07 by a first cold air pipeline L1 for further cooling, and cold air discharged from the cooling device (namely the water-cooled cooling device) B07 is conveyed to an air supply device B08 of the vertical cooler by a second cold air pipeline L2 for further supplying cooling air to an air ring air supply device 6 or 6T and an air cap air supply device 7 or 7T respectively;

(4) The sinter deposited in the tower body of the cooler is cooled by countercurrent heat exchange with the cooling gas flowing from bottom to top, and is discharged onto the cold sinter conveyor 11 through the discharge outlet 5a or E of the lower part of the vertical cooler, namely, is discharged onto the cold sinter conveyor 11 through the discharge outlet 5a or E of the tower cone 5 or the discharge cone hopper 5T of the lower part of the vertical cooler; and

(5) The cold air collected in the seal cover device B09 at the lower part of the vertical cooler is transferred through the seal cover device air supply duct (i.e., the third cold air duct) L3 and is merged with the cold air in the second cold air duct L2 or the first cold air duct L1.

The process can also overcome the problem of secondary sintering of the sinter in the vertical cooling device and prevent the blockage phenomenon of the vertical cooling device. The device runs for 24 months, and the problem of blockage is avoided.

In the embodiment, the cooling gas is fully circulated, so that secondary sintering of high-temperature sintering ores is avoided, and caking and blocking are avoided.

Claims

1. The sinter cooling and waste heat utilization system comprises a vertical cooler, a first dust collector (B04), a waste heat boiler and power generation system (B05), a cooling device (B07) and a sealing cover device (B09) arranged at the lower part of the vertical cooler, wherein a hot air outlet (8) is arranged at the upper part or top cover of the vertical cooler, an air supply device (B08) is arranged at the middle part and a discharge port (5 a) is arranged at the bottom,

The hot air outlet (8) of the vertical cooler is connected with a hot air inlet of the waste heat boiler and the power generation system (B05) through a hot air pipeline (L0), the first dust remover (B04) is arranged on the hot air pipeline (L0), a cold air outlet of the waste heat boiler and the power generation system (B05) is connected to an air inlet of the cooling device (B07) through a first cold air pipeline (L1), an air outlet of the cooling device (B07) is connected to an air supply device (B08) of the vertical cooler through a second cold air pipeline (L2), and a circulating fan (B10) is arranged on the first cold air pipeline (L1) or the second cold air pipeline (L2); the air supply device (B08) comprises an air ring air supply device (6) and a hood air supply device (7); and

the sealing cover device (B09) is arranged at a discharge outlet (5 a) of the lower part of the vertical cooler, and an air outlet of the sealing cover device (B09) is connected to the front section of the first cold air pipeline (L1) or the front section of the second cold air pipeline (L2) through an air supply pipeline (L3) of the sealing cover device; the sealing cover device is a single cover body or an integral cover body which seals all the discharge holes, the lower part of the cover body is provided with a discharge hole, and a cold sinter conveyor is arranged below the discharge hole; the sealed cover device is used for collecting the gas or cold air exhausted or leaked from all the exhaust outlets of the cooler and conveying and circulating the gas or cold air into the cooler through the air supply pipeline of the sealed cover device, so that the cooling gas or cooling air circulates in the system, namely, the full circulation is formed.

2. The sinter cooling and waste heat utilization system of claim 1, wherein: the first dust remover is an impact plate type gravity dust remover, the cooling device is a water-cooled cooling device, and the bottom of the system is provided with a plurality of discharge ports (5 a).

3. The sinter cooling and waste heat utilization system of claim 1, wherein: an exhaust fan (B11) is arranged on the air supply pipeline (L3) of the sealing cover device; and/or

A second dust remover (B06) is arranged on the first cold air pipeline (L1); and/or

A nitrogen pipeline (13) with a nitrogen valve and an air supplementing pipeline (14) with a supplementing valve are connected to the first cold air pipeline (L1) or the second cold air pipeline (L2).

4. The sinter cooling and waste heat utilization system of claim 1, wherein: a flue gas generator (15) is arranged on the hot air pipeline (L0) at the upstream or downstream of the first dust remover (B04); and/or

A stack (16) is vented at the top of the vertical cooler.

5. The sinter cooling and waste heat utilization system as claimed in any one of claims 1 to 4, wherein: the vertical cooler is a plate type ore feeder discharging type vertical cooler (A3), a plurality of discharging cone hopper discharging type vertical coolers (A2) or a plurality of flashboard discharging type vertical coolers (A1); and/or

The air supply device (B08) comprises an air ring air supply device (6), an air ring (H) which is communicated with the air ring air supply device (6) and is positioned at the side part of the tower body of the cooler, an air cap air supply device (7) and an air cap (M) which is communicated with the air cap air supply device (7) and extends into the tower body from the bottom of the tower body upwards.

6. The sinter cooling and waste heat utilization system of claim 5, wherein: a vertical cooler (A1) with a plurality of gate plates for discharging comprises: the device comprises a storage bin (1), a distributing pipe (2), a tower body composed of a tower body top cover (3), a tower wall (4), a tower body cone (5) below a position Yu Dabi (4) and a tower bottom (D), a wind ring (H), a wind cap (M), a plurality of discharging outlets (5 a) arranged at the lower part of the tower body cone (5) and a hot air outlet (8) arranged at the upper part of the tower wall (4) or on the tower body top cover (3);

wherein the top cover (3) is fixedly connected with the upper end of the tower wall (4), the bin (1) is arranged above the top cover (3), the upper end of the distributing pipe (2) is connected with the bottom of the bin (1), the lower end of the distributing pipe (2) stretches into the lower part of the top cover,

the plurality of discharging outlets (5 a) are annularly distributed around the lower part of the tower body cone (5) or the plurality of discharging outlets (5 a) are uniformly distributed along the circumferential direction of the lower part of the tower body cone (5),

A fixed gap of a circle is formed between the lower part of the tower wall (4) and the top of the tower body cone (5) as a wind ring (H),

the central position of the tower bottom (D) is provided with a hood (M) which extends upwards into the space in the tower body, and

a discharge gate (12) is provided at each discharge outlet (5 a), and a discharge channel (10) is provided below the discharge gate (12).

7. The sinter cooling and waste heat utilization system of claim 6, wherein: the discharge channel (10) is a discharge chute corresponding to each discharge outlet (5 a) or the discharge channel (10) is a discharge hopper.

8. The sinter cooling and waste heat utilization system of claim 6, wherein: a cold sinter conveying device (11) is arranged at the tail end or below the discharging channel (10); and/or

A tower wall transition section (4 a) is further arranged at the lower part or below the tower wall (4) and above the tower cone (5).

9. The sinter cooling and waste heat utilization system as claimed in claim 8, wherein the vertical cooler (A1) further comprises a wind ring wind supply device (6), the wind ring wind supply device (6) comprises a wind ring wind channel (601) and a wind ring wind pipe (602) connected to the wind ring wind channel (601), and the wind ring wind channel (601) surrounds the wind ring (H) and is communicated with the wind ring (H).

10. The sinter cooling and waste heat utilization system as claimed in claim 9, wherein the vertical cooler (A1) further comprises a hood air supply device (7), the hood air supply device (7) comprising a plurality of hood branch pipes (701), an annular or "C" shaped hood air duct (702) and a hood air duct (703) connected to the hood air duct (702), one end of each hood branch pipe (701) being in communication with the hood air duct (702) and the other end being in communication with the bottom or stem of the hood (M).

11. Sinter cooling and waste heat utilization system according to any one of claims 6-10, characterized in that a temperature probe (9) is provided in the lower part of the tower wall (4).

12. Sinter cooling and waste heat utilization system according to claim 11, characterized in that the temperature probe (9) is a thermocouple temperature sensor.

13. The sinter cooling and waste heat utilization system as claimed in any one of claims 6 to 10, wherein: the number of the discharging outlets (5 a) is 4-12; and/or

The number of the hood branch pipes (701) is 1-12.

14. The sinter cooling and waste heat utilization system of claim 13, wherein: the number of the discharging outlets (5 a) is 6-10; the number of the hood branch pipes (701) is 2-10.

15. The sinter cooling and waste heat utilization system of claim 14, wherein: the number of the discharge outlets (5 a) is 6-8; the number of the hood branch pipes (701) is 4-8.

16. The sinter cooling and waste heat utilization system of claim 13, wherein: the hood branch pipe (701) is connected to the bottom of the hood (M) in a downward bending manner or connected to the stem of the hood (M) through the wall of the tower cone (5).

17. The sinter cooling and waste heat utilization system as claimed in any one of claims 6 to 10, 12, 14 to 16, wherein: the hood (M) comprises a support frame (M01), a hood top cover (M02), a plurality of conical cover plates (M03) and a hood air pipe (M04), wherein the plurality of conical cover plates (M03) are sequentially arranged on the support frame (M01), and the diameters of the bottoms of the conical cover plates (M03) are sequentially increased from top to bottom; the hood top cover (M02) is arranged above the topmost conical cover plate (M03), and the air pipe (M04) is arranged below the supporting frame (M01) and connected with the supporting frame (M01).

18. The sinter cooling and waste heat utilization system of claim 17, wherein: the hood top cover (M02) is of a conical structure.

19. The sinter cooling and waste heat utilization system of claim 11, wherein: the vertical cooler (A1) further comprises a control system (K), wherein the control system (K) is connected with the air ring air supply device (6), the air cap air supply device (7), the temperature measuring probe (9), the discharging gate (12) and the cold sinter conveying device (11) and controls the operation of the air ring air supply device (6), the air cap air supply device (7), the temperature measuring probe (9), the discharging gate (12) and the cold sinter conveying device.

20. The sinter cooling and waste heat utilization system of claim 5, wherein: a vertical cooler (A2) with a plurality of discharge cone hoppers comprises: the device comprises a storage bin (1), a distributing pipe (2), a tower body formed by a tower body top cover (3) and a tower body wall (4), a plurality of discharging cone hoppers (5T) below a position Yu Dabi (4), a wind ring (H), a wind cap (M) and a hot air outlet (8) arranged on the upper part of the tower body wall (4) or the tower body top cover (3);

the plurality of discharging cone hoppers (5T) are annularly distributed at the lower end of the tower wall (4) or uniformly distributed along the circumferential direction,

a fixed gap of a circle is formed between the lower part of the tower wall (4) and the tops of the plurality of discharging cone hoppers (5T) to be used as an air ring (H),

a hood (M) extending upwards into the space in the tower body is arranged at the central position of the bottom of the tower body, and

a discharging device (P) is arranged below the discharging outlet (5 a) of each discharging cone hopper (5T).

21. The sinter cooling and waste heat utilization system of claim 5, wherein: the discharge type vertical cooler (A3) of the plate type ore feeder comprises: the device comprises a storage bin (1), a distributing pipe (2), a tower body formed by a tower body top cover (3) and a tower body wall (4), a plurality of discharging cone hoppers (5T) below a position Yu Dabi (4), a wind ring (H), a wind cap (M) and a hot air outlet (8) arranged on the upper part of the tower body wall (4) or the tower body top cover (3);

a fixed gap of a circle is formed between the lower part of the tower wall (4) and the tops of a plurality of discharging cone hoppers (5T) as an air ring (H), an air cap (M) which extends upwards into the space in the tower body is arranged at the bottom center position of the tower body, and

a plate type ore feeder (12T) is arranged below each discharging cone hopper (5T).

22. The sinter cooling and waste heat utilization system of claim 20, wherein: the discharging type vertical cooler (A2) with the plurality of discharging cone hoppers further comprises an air ring air supply device (6T), the air ring air supply device (6T) comprises an air ring air channel (601T) and an air ring air pipe (602T) connected to the air ring air channel (601T), and the air ring air channel (601T) surrounds the air ring (H) and is communicated with the air ring.

23. The sinter cooling and waste heat utilization system of claim 21, wherein: the plate-type ore feeder discharging type vertical cooler (A3) further comprises an air ring air supply device (6T), the air ring air supply device (6T) comprises an air ring air channel (601T) and an air ring air pipe (602T) connected to the air ring air channel (601T), and the air ring air channel (601T) surrounds the air ring (H) and is communicated with the air ring.

24. The sinter cooling and waste heat utilization system of claim 22, wherein: the discharging type vertical cooler (A2) with the plurality of discharging cone hoppers further comprises a hood air supply device (7T), wherein the hood air supply device (7T) comprises a plurality of hood branch pipes (701T), an annular or C-shaped hood air duct (702T) and hood air pipes (703) connected with the hood air duct (702T), one end of each hood branch pipe (701T) is communicated with the hood air duct (702T), and the other end of each hood branch pipe is communicated with the bottom of a hood (M).

25. The sinter cooling and waste heat utilization system of claim 23, wherein: the plate type ore feeder discharging type vertical cooler (A3) further comprises a hood air supply device (7T), the hood air supply device (7T) comprises a plurality of hood branch pipes (701T), an annular or C-shaped hood air duct (702T) and a hood air duct (703) connected with the hood air duct (702T), one end of each hood branch pipe (701T) is communicated with the hood air duct (702T), and the other end of each hood branch pipe is communicated with the bottom of the hood (M).

26. The sinter cooling and waste heat utilization system of claim 20, wherein: a cold sinter conveying device (11) is arranged below the tail end of the discharging equipment (P); and/or

A tower wall transition section (4 a) is further arranged at the lower part or below the tower wall (4) and above the discharge cone (5T).

27. The sinter cooling and waste heat utilization system of claim 26, wherein: a cold sinter conveying device (11) is arranged below a discharge hole of the plate-type ore feeder (12T).

28. The sinter cooling and waste heat utilization system of claim 27, wherein: a discharging chute or a discharging hopper (13T) is arranged below a discharging hole of the plate-type ore feeder (12T), and a cold sinter conveying device (11) is arranged below the discharging chute or the discharging hopper (13T); and/or

29. The sinter cooling and waste heat utilization system as claimed in any one of claims 20 to 28, wherein: an adjusting rod (10T) is arranged at the middle part or the lower part of the discharging cone hopper (5T); and/or

A plurality of temperature measuring probes (9) are arranged at the lower part of the tower wall (4) or on the transition section (4 a) of the tower wall.

30. The sinter cooling and waste heat utilization system of claim 29, wherein: the temperature measuring probe (9) is a thermocouple temperature sensor.

31. The sinter cooling and waste heat utilization system as claimed in any one of claims 20 to 28, 30, wherein: the number of the discharging cone hoppers (5T) is 4-12.

32. The sinter cooling and waste heat utilization system of claim 31, wherein: the number of the discharging cone hoppers (5T) is 6-10.

33. The sinter cooling and waste heat utilization system of claim 32, wherein: the number of the discharging cone hoppers (5T) is 6-8.

34. The sinter cooling and waste heat utilization system as claimed in claim 24 or 25, wherein: the number of the hood branch pipes (701T) is 1-12.

35. The sinter cooling and waste heat utilization system of claim 34, wherein: the number of the hood branch pipes (701T) is 2-10.

36. The sinter cooling and waste heat utilization system of claim 35, wherein: 4-8 hood branch pipes (701T).

37. The sinter cooling and waste heat utilization system of claim 36, wherein: 6-8 hood branch pipes (701T).

38. The sinter cooling and waste heat utilization system as claimed in any one of claims 35 to 37, wherein: each hood branch pipe (701T) is positioned in a gap between two adjacent discharge cone hoppers (5T).

39. The sinter cooling and waste heat utilization system as claimed in any one of claims 20 to 28, 30, 32 to 33, 35 to 37, wherein: the hood (M) comprises a support frame (M01), a hood top cover (M02), a plurality of conical cover plates (M03) and a hood air pipe (M04), wherein the conical cover plates (M03) are sequentially arranged on the support frame (M01), the hood top cover (M02) is arranged above the topmost conical cover plate (M03), and the air pipe (M04) is arranged below the support frame (M01) and connected with the support frame (M01).

40. The sinter cooling and waste heat utilization system as claimed in claim 39, wherein: the hood top cover (M02) is of a conical structure.

41. The sinter cooling and waste heat utilization system as claimed in any one of claims 20 to 28, 30, 32 to 33, 35 to 37, 40, wherein: the discharging device (P) is a vibrating feeder.

42. The sinter cooling and waste heat utilization system as claimed in claim 41, wherein: the discharging device (P) is a double-layer vibrating feeder, and the double-layer vibrating feeder comprises a machine body bracket (P01), an upper-layer vibrating groove (P02), a lower-layer vibrating groove (P03) and a vibrator (P04); the upper layer vibration groove (P02) and the lower layer vibration groove (P03) are arranged on the machine body support (P01), the upper layer vibration groove (P02) is located above the lower layer vibration groove (P03), and the upper layer vibration groove (P02) and the lower layer vibration groove (P03) are respectively connected with the vibrator (P04).

43. The sinter cooling and waste heat utilization system as claimed in claim 42, wherein: an adjusting device (P05) is arranged on the upper layer vibrating groove (P02) and/or the lower layer vibrating groove (P03), and the adjusting device (P05) adjusts the inclination angle of the bottom plate of the lower layer vibrating groove (P03).

44. The sinter cooling and waste heat utilization system as claimed in claim 43, wherein: the vibrator (P04) comprises an upper vibrator (P0401) and a lower vibrator (P0402), the upper vibrator (P0401) is connected with the upper vibration groove (P02), and the lower vibrator (P0402) is connected with the lower vibration groove (P03).

45. The sinter cooling and waste heat utilization system as claimed in claim 44, wherein: the upper layer vibration groove (P02) and the lower layer vibration groove (P03) are arranged on the machine body bracket (P01) through springs.

46. A sinter low oxygen full cycle cooling method using the sinter cooling and waste heat utilization system as claimed in any one of claims 1 to 45, comprising the steps of:

(1) Hot sinter from the sintering machine enters a storage bin (1) of the vertical cooler, continuously flows from top to bottom under the action of gravity, and is accumulated in a tower body of the vertical cooler through a material distribution pipe (2);

(2) The air supply device (B08) of the vertical cooler, namely an air ring air supply device (6) and an air cap air supply device (7), respectively conveys circulating cooling gas with low oxygen content into the tower body through an air ring (H) and an air cap (M), the cooling gas passes through a sinter material layer piled in the tower body from bottom to top, performs countercurrent heat exchange with the sinter, and gradually increases the temperature of the cooling gas after heat exchange, and is discharged through the sinter material surface in the tower body of the vertical cooler to form high-temperature hot air, and the high-temperature hot air is discharged through a hot air outlet (8);

(3) The high-temperature hot air discharged from the hot air outlet (8) is conveyed through a hot air pipeline (L0) and enters a waste heat boiler and a power generation system (B05) for waste heat utilization after being dedusted by a first deduster (B04), cold air discharged from the waste heat boiler and the power generation system (B05) is conveyed to a cooling device (B07) through a first cold air pipeline (L1) for further cooling, and cold air discharged from the cooling device (B07) is conveyed to an air supply device (B08) of the vertical cooler through a second cold air pipeline (L2) for further supplying cooling air to an air ring air supply device (6) and an air cap air supply device (7) respectively;

(4) Sinter deposited in the tower body of the cooler is cooled by countercurrent heat exchange with cooling gas flowing from bottom to top, and is discharged to a cold sinter conveyor (11) through a discharge outlet (5 a) at the lower part of the vertical cooler; and

(5) Cold air collected in a sealed cover device (B09) at the lower part of the vertical cooler is conveyed through a sealed cover device air supply pipeline (L3) and is converged with cold air in a second cold air pipeline (L2) or a first cold air pipeline (L1).

47. The method according to claim 46, wherein: the method further comprises, prior to step (1):

(1b) Pretreatment: and (3) starting a circulating fan (B10), opening a nitrogen valve of a nitrogen pipeline and/or starting a flue gas producer, and introducing nitrogen and/or low-oxygen-content flue gas into the system so that the oxygen content of cooling gas circulating in the system is lower than 15vol%.

48. The method according to claim 46, wherein: the method further comprises, prior to step (1):

(1b) Pretreatment: the sinter with the temperature lower than 150 ℃ is conveyed into a feed bin (1) of the vertical cooler, continuously flows from top to bottom under the action of gravity, is accumulated in a tower body of the vertical cooler through a material distribution pipe (2), a circulating fan (B10) is started, a nitrogen valve of a nitrogen pipeline is opened and/or a smoke gas generating furnace is started, and nitrogen and/or smoke gas with low oxygen content is introduced into the system for gas circulation, so that the oxygen content of cooling gas circulated in the system is lower than 15vol%.

49. The method of claim 48, wherein: in the pretreatment step (1 b), when the oxygen content of the cooling gas circulated in the system is lower than 15vol%, the nitrogen valve of the nitrogen pipeline is closed and/or the flue gas generating furnace is closed, and when the cold sinter is started to be discharged from the tower body, the system is subjected to the step (1), namely, the system is put into a normal operation state.

50. The method of any one of claims 46-49, wherein: further, the supply of cooling gas to the air ring air supply device (6) and the hood air supply device (7) respectively means: furthermore, cooling gas is supplied to the wind ring wind supply device (6), the wind ring (H) and the wind cap wind supply device (7) which are positioned at the side part of the tower body of the cooler and are communicated with the wind ring wind supply device (6), and the wind cap (M) which is communicated with the wind cap wind supply device (7) and extends into the tower body from the bottom of the tower body upwards.

51. The method of any one of claims 46-49, wherein: cold air discharged from the waste heat boiler and the power generation system (B05) is conveyed by a first cold air pipeline (L1) and is dedusted by a second deduster (B06) arranged on the first cold air pipeline (L1), then is conveyed to a cooling device (B07) for further cooling, and cold air discharged from the cooling device (B07) is conveyed to an air supply device (B08) of the vertical cooler by a second cold air pipeline (L2) under the suction of a circulating fan (B10).

52. The method of any one of claims 46-49, wherein: cold air collected in a sealed hood device (B09) at the lower part of the vertical cooler is conveyed by a sealed hood device air supply pipeline (L3) under the suction of an exhaust fan (B11) and is merged with cold air in a second cold air pipeline (L2) at the upstream of a circulating fan (B10).

53. The method of claim 51, wherein: cold air collected in a sealed hood device (B09) at the lower part of the vertical cooler is conveyed by a sealed hood device air supply pipeline (L3) under the suction of an exhaust fan (B11) and is merged with cold air in a second cold air pipeline (L2) at the upstream of a circulating fan (B10).

54. The method of any one of claims 46-49, wherein: a temperature measuring probe (9) is arranged above each discharging outlet (E) correspondingly, and the discharging speed of the corresponding discharging outlet (E) or the operation of the corresponding discharging outlet (E) is controlled by a control system (K) according to the temperature detected by each temperature measuring probe (9).

55. The method of claim 51, wherein: a temperature measuring probe (9) is arranged above each discharging outlet (E) correspondingly, and the discharging speed of the corresponding discharging outlet (E) or the operation of the corresponding discharging outlet (E) is controlled by a control system (K) according to the temperature detected by each temperature measuring probe (9).

56. The method of claim 52, wherein: a temperature measuring probe (9) is arranged above each discharging outlet (E) correspondingly, and the discharging speed of the corresponding discharging outlet (E) or the operation of the corresponding discharging outlet (E) is controlled by a control system (K) according to the temperature detected by each temperature measuring probe (9).