CN206959604U - A kind of flashboard unloading type vertical cooling machine - Google Patents

Abstract

Ram discharge type vertical cooler, including: silo (1), distribution pipe (2), tower body top cover (3), tower wall (4), tower body cone located below the tower wall (4) The tower body formed by the cylinder (5) and the tower bottom (D), the wind ring (H), the wind cap (M), the multiple discharge outlets (5a) arranged at the bottom of the discharge cone (5), and the tower The hot air outlet (8) on the top of the wall (4) or the tower body top cover (3); a fixed gap of one week is formed between the bottom of the tower wall (4) and the top of the discharge cone (5) as a wind ring ( H), the central position at the bottom of the tower is provided with a wind cap (M) extending upwards into the inner space of the tower body, and each discharge outlet (5a) is correspondingly provided with a discharge gate (12), and at the discharge gate ( 12) is provided with a discharge channel (10) below.

Description

A ram unloading type vertical cooler

technical field

The utility model relates to a ram discharge type vertical cooling machine, which belongs to the field of ironmaking and the field of environmental protection.

Background technique

In the modern sintering process, "cooling" is one of the most critical processes. After the sintered ore has been roasted by the sintering machine, it has formed a high-temperature finished ore. How can it be protectively cooled without affecting its quality and yield, so that it can be sent to the finished product ore bin through a belt conveyor, and at the same time The perfect recovery and utilization of the sensible heat energy it carries has always been a problem that technicians in the industry have been constantly studying. Since the 1960s, the cooling process of sinter has been developed rapidly, which is mainly divided into three categories: belt cooling, ring cooling and disk cooling. In the late market competition, the strip cooling technology was eliminated, and the remaining ring cooling and disk cooling technologies each have their own advantages and disadvantages. However, in a comprehensive comparison, the waste heat utilization rate of disk cooling is better than that of ring cooling (all sensible heat of sinter can be recycled), so disk coolers are widely used in foreign markets, and this patent also elaborates on the technology of disk coolers.

The technology of disk coolers has been developed since the 1970s. At the beginning, it was horizontal disk cooling, that is, the cooling air flows from the inner ring to the outer ring of the disk cooler, and passes through the material layer to be cooled to exchange heat with it. The cooling air is directly discharged to the atmosphere. This is neither economical nor environmentally friendly. After years of continuous research and optimization, the latest disk cooler technology is the "ventilated longitudinal disk cooling technology" proposed by Japan's Mitsubishi Hitachi and Zhongsheng Iron and Steel. This technology adopts air extraction, which draws the cooling air from the atmosphere into the bottom of the material to be cooled, then passes through the material layer vertically upwards, and finally blows out from the upper part of the material layer to enter the subsequent process. Compared with the original scheme, this scheme has been greatly optimized and improved. The following will introduce this scheme in detail.

JP2008232519A (Mitsubishi Hitachi and Zhongsheng Iron and Steel, hereinafter referred to as D1) discloses the ventilation type longitudinal plate cooling technology, see Figure 1 in it: hot sintered ore falls from the tail of the sintering machine into the feed chute, and accumulates in the chute to form a certain height of material Column, on the one hand, it can play the role of uniform feeding, on the other hand, it can play the role of material sealing to prevent the air from passing through the feeding port. The mineral material continues to pass through the hood and then enters the cooler box, pushing it into a material column of a certain height. At the same time, affected by the negative pressure of the exhaust fan, the air near the plate cooler will be sucked into the material column through the louver air intake device, and pass through the material column from bottom to top to exchange heat with it. The top surface of the material column passes through the air outlet, is sent to the gravity dust collector and waste heat boiler, and finally is discharged outside after passing through the exhaust fan. After being cooled by air, the sintered material forms an annular accumulation area with a cross-section of a 37-degree accumulation angle triangle at the lower tray of the plate cooler. When it is rotated to the unloading area, the sintered material is scraped off by the scraper device to complete the cooling process. Enter the next process link.

Although Mitsubishi Hitachi and Zhongsheng Steel's "ventilated longitudinal plate cooling technology" has made significant progress compared with conventional technologies, it still has the following five defects:

1) The overall height requirement of the device is too high: since the "ventilated longitudinal plate cooling technology" adopts the draft method, it is necessary to install a material seal at the position of the feed inlet, that is, the material column accumulated in the feed chute in Figure 1 of D1, The height of the material seal is 1.2 to 1.5 times the height of the material column in the cooler box as the standard. In this way, the height of the entire set of plate coolers is virtually increased. During construction and installation, either the elevation of the entire sintering machine needs to be raised, or the civil engineering plane of the plate cooler needs to be dug down. No matter which way you choose, it will cause a high investment cost, which is not cost-effective in terms of economic indicators;

2) The open circulation of the air flow leads to low utilization rate of waste heat and pollutes the environment: Since the air flow of the "extraction type longitudinal plate cooling technology" is an open circuit circulation, the air from the waste heat boiler is directly exhausted and not recycled, resulting in more than 100 Sensible heat of the air at a high temperature is wasted, and the discharged air contains a large amount of small particles of dust, causing a certain degree of particle pollution to the atmosphere;

3) The material at the feed inlet is severely worn: due to the "ventilated longitudinal plate cooling technology" that sets the material seal at the feed chute, there will be a friction distance between the lower part of the material seal and the upper layer of the material surface in the plate cooler box. At this time, the sintered material is easily pulverized and broken when it is rubbed under the double-layer harsh working conditions of high temperature and upper material column extrusion, thereby reducing the yield of the sintering machine;

4) The environmental pollution is serious: due to the negative pressure ventilation technology adopted in the "ventilation type longitudinal plate cooling technology", it does not set a sealing cover device at the lower tray of the box body. In this way, when the sintered ore is scraped off by the scraper device, it is easy to cause a large number of fine particles and dust to splash. And once the exhaust fan breaks down, all the material dust pushed around the plate cooler will enter the atmosphere, causing extremely bad influence on the operating environment next to the machine.

5) The thermal efficiency of the waste heat boiler has not reached the highest level: because the "draft-type longitudinal plate cooling technology" does not accurately classify the air passing through the material layer according to the air temperature, but mixes it all into the waste heat boiler, so when the outlet air temperature of the low-temperature section is too low , it will inevitably lower the temperature of the air entering the waste heat boiler, thereby reducing the thermal efficiency value of the waste heat boiler.

At present, the sinter cooling mainly adopts the traditional belt cooler or ring cooler based on the principle of high wind quick cooling and one-time loading and unloading cooling. No matter which cooling method is used, the cooling machine has problems such as large air leakage rate, high power consumption of the fan, low recovery rate of sensible heat, and low thermal efficiency of the boiler. In other words, in the current environment where the market has increasingly stringent requirements for energy saving and green manufacturing in sintering production, it is difficult for the original equipment structure to realize efficient recovery and utilization of sensible heat of sintering ore.

Therefore, it is the only way for the sinter industry to save energy and protect the environment by breaking through the limitations of traditional ring cooling or belt cooling and developing a process and technical equipment for efficient recovery of sinter sensible heat.

Utility model content

Therefore, through a large amount of research work on the recovery of sensible heat of sinter at home and abroad, a cooling process based on small wind and slow cooling of sinter countercurrent thick material layer is proposed. This process has the advantages of slow sinter cooling speed, small cooling air volume per ton consumption, relatively small waste gas volume, high waste gas temperature, high boiler thermal efficiency, all cooling waste gas can be used by the boiler, and the sensible heat recovery rate of sinter can generally reach about 70%. cooling features. According to the sinter countercurrent thick material layer cooling process, a new vertical cooler has been developed, which has the characteristics of uniform material distribution, uniform discharge, and uniform air distribution, and can also adjust regional discharge according to the cooling effect. , so the cooling effect of the cooler is good, and the temperature of the hot air is high, which meets the requirements of the sinter countercurrent thick layer cooling process.

Compared with the original ring cooler, the utility model vertical cooler has simple structure, reliable sealing, no air leakage, less equipment maintenance, and high waste heat recovery efficiency.

The purpose of this utility model is to provide a vertical cooling machine for cooling sintered ore, which has a tower structure, so it can also be called a tower cooling machine.

According to the utility model, there is provided a ram unloading type vertical cooler, which includes: a silo, a material distribution pipe, a tower body top cover, a tower wall, a tower body cone located below the tower wall and The tower body formed by the bottom of the tower, the wind ring, the wind cap, the multiple discharge outlets arranged at the lower part of the tower cone, and the hot air outlet arranged at the upper part of the tower wall or on the top cover of the tower body;

Wherein, the top cover is fixedly connected with the upper end of the tower wall, the feed bin is arranged above the top cover, the upper end of the distribution pipe is connected with the bottom of the feed bin, and the lower end of the distribution pipe extends below the top cover,

The plurality of discharge outlets are distributed in a ring around the lower part of the tower cone or the plurality of discharge outlets are evenly distributed along the circumferential direction of the lower part of the tower 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.

The central position of the bottom of the tower is provided with a wind cap extending upward into the inner space of the tower body, and

Each discharge outlet is correspondingly provided with a discharge gate or a discharge gate, and a discharge channel is provided below the discharge gate; preferably, the discharge channel is corresponding to each discharge outlet The discharge chute or the discharge channel is a discharge hopper of integral design.

Generally, the hood protrudes into the inner space of the tower so that the height of the hood duct (ie the stem of the hood) is sufficient to reach the height of the wind ring.

Preferably, a cold sinter conveying device is provided at the end or below the discharge channel, for example, at the end of the discharge chute or below the discharge hopper.

Preferably, a tower wall transition section is further provided at the lower part or below the tower wall and above the tower cone. In this way, it is more convenient to install the tower cone at the bottom of the tower wall. In this case, the tower body is formed by the tower head, the tower wall and the lower (inverted cone-shaped or inverted-cone-shaped) tower wall transition section. The transition section of the tower wall is in the shape of an inverted cone or an inverted cone, ie, the inner diameter of its lower part is smaller than that of its upper part. It can also be called transition bucket or upper cone bucket. The cone angle of the inverted conical or inverted conical tower wall transition section is generally 60-75 degrees, preferably >63.5 degrees.

The outer diameter of the lower end of the tower cone is smaller than the outer diameter of the upper end. Therefore, the cone of the tower is in the shape of an inverted cone.

Generally, the vertical cooling machine also includes an air ring air supply device, the air ring air supply device includes an air ring air channel and an air ring air duct connected to the air ring air channel, the air ring air channel surrounds the air ring and Connect with it.

Generally, the vertical cooling machine also includes a hood air supply device, which includes a plurality of hood branch pipes, an annular or "C" shaped hood air duct and a hood air duct connected to the hood air duct, each of the hood branch pipes One end communicates with the hood air duct and the other end communicates with the bottom or stem of the hood. The stem described here is the hood duct.

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

Taking the wind ring as the dividing point, the height of the cone of the tower body (or called the height of the lower material layer) h1 is greater than the height of the stacked materials (or called the height of the upper material layer) h2 of the tower wall.

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

Generally, the number of hood branch pipes is 1-12, preferably 2-10, more preferably 4-8, more preferably 6-8. Preferably, the branch pipe of the hood is bent downwards and connected to the bottom of the hood, or the branch pipe of the hood passes through the wall of the cone of the tower body and is connected to the stem of the hood, that is, the air pipe of the hood.

Preferably, the hood includes a support frame, a hood top cover, a plurality of conical cover plates and a hood air duct, and the plurality of conical cover plates are sequentially arranged on the support frame, and from top to bottom, the bottom diameters of the conical cover plates are sequentially Increase; the top cover of the wind cap is arranged above the top conical cover plate, and the air duct is arranged under the support frame and connected with the support frame. Preferably, the top cover of the hood is a conical structure.

Preferably, the vertical cooling machine also includes a control system, the control system is connected with the air ring air supply device, the air cap air supply device, the temperature measuring probe, the discharge gate, and the cold sinter conveying device, and controls the air ring air supply device, the air cap air supply device Operation of air supply device, temperature measuring probe, discharge gate and cold sinter conveying device.

According to the utility model, there is also provided a method for cooling sinter or a method for cooling sinter by using the above-mentioned ram discharging vertical cooler, the method includes the following steps:

(1) The sinter enters the silo of the vertical cooler, flows continuously from top to bottom under the action of gravity, and accumulates in the tower body of the cooler through the distribution pipe;

(2) The air ring air supply device and the wind cap air supply device of the vertical cooler respectively deliver cooling gas (that is, cold wind or air) into the tower body through the wind ring and wind cap, and the cooling gas passes through the accumulated in the tower body from bottom to top. The sintered ore material layer is subjected to countercurrent heat exchange with the sintered ore. After the heat exchange, the temperature of the cooling gas gradually increases, and is discharged through the sintered ore material surface in the tower of the vertical cooler to form high-temperature hot air, which is discharged through the hot air outlet; preferably The most important thing is that the high-temperature hot air is transported to the waste heat utilization system (such as waste heat power generation system);

(3) The sinter accumulated in the tower body of the cooling machine is cooled by countercurrent heat exchange with the bottom-up cooling gas, and enters the tower cone at the bottom of the vertical cooler, and then from the bottom of the tower cone The multiple discharge outlets are discharged, and then discharged through the discharge channel (for example, discharged to the cold sinter conveying device).

Preferably, according to the temperature detected by the temperature measuring probe, the control system controls the operation of the air ring air supply device, the hood air supply device, the discharge gate or discharge gate and the cold sinter conveying device.

Preferably, a temperature measuring probe is set corresponding to each discharge outlet, and according to the temperature detected by each temperature measuring probe, the control system controls the operation of the corresponding discharge gate or discharge gate (that is, controls the corresponding discharge gate Exit operation), such as up and down movement. By lifting or opening and closing the discharge gate or discharge gate (at the discharge outlet), the temperature of the material above it is adjusted.

Preferably, in the vertical cooler, the height h1 of the cone of the tower body is greater than the height h2 of the stacked materials on the tower wall.

In the utility model, the material is discharged from the inside to the outside through the discharge gate at the lower part of the tower body cone, which can minimize the difference in the discharge speed of the material at the center and edge of the vertical cooling tower. The cooled sinter discharged from the discharge gate flows into the discharge channel below (such as the lower chute), and then flows out from the lower outlet of the discharge channel (such as the lower chute), and flows into the conveyor below it. transported to the next process. After the cooling air entering the tower body undergoes heat exchange with the hot sinter, it cools the hot sinter to below 150°C, and itself is heated to a higher temperature to become hot air. The hot air passes through the material layer and then passes through the material layer at the top It enters the material-free area at the upper end of the tower body formed by the top cover and the tower wall, and then is discharged through the hot air outlet to enter the subsequent waste heat power generation system.

The silo is a cylindrical or square barrel structure, which is used to buffer the hot sinter transported by the conveyor, and the bottom of the silo is fixedly connected to the top cover. The distributing pipe is a cylindrical or square barrel-shaped structure, located at the bottom of the silo, its upper end is fixedly connected with the bottom of the silo, and its lower end extends below the top cover, and is located inside the tower body composed of the top cover and the tower wall. The sintered ore can be It enters into the distribution pipe from the bottom of the silo under the action of gravity, and can freely flow out from the lower opening of the distribution pipe under the action of gravity. The tower wall is a cylindrical or square barrel-shaped structure, its upper end is fixedly connected to the top cover, and a fixed gap is formed between the lower end of the tower wall and the cone of the tower body, which is the wind ring, and a certain part in the middle is fixed on the foundation Above, the weight of the top cover is carried on the tower wall for a week. The air ring is a circular cavity formed between the tower wall and the tower body cone. The cooling air can be evenly blown into the sintered ore in the tower body through a ring of air ring to cool the sintered ore. The wind ring air supply device can supply wind to the wind ring. The air cap is located at the lower part of the tower wall and is located on the cone of the tower body. The cooling air can be evenly blown into the sintered ore in the tower body through the air cap around to cool the sintered ore. The cone of the tower body is located at the lower end of the tower wall and is fixed to the foundation. At the same time, a wind ring is formed between the tower wall and the wind cap is fixed at its upper end. Preferably, the shape of the cone of the tower body is a conical structure with a large top and a small bottom. The cooled sinter flows into the cone of the tower body under the action of gravity. The material in the tower cone can control the discharge speed of the corresponding material outlet of the tower cone through the up and down movement of each discharge gate. Generally, the hot air outlet is located on the upper part of the tower wall, fixedly connected with the tower wall, and communicated with the inside of the tower body. The material area, and then discharged through the hot air outlet, and then enters the follow-up waste heat power generation system.

Preferably, several temperature measuring probes are evenly arranged along the circumference at the lower part of the tower wall, which are located at the upper part of the wind ring, fixed on the tower wall, and one end of which extends into the tower body for a short period to detect the temperature of the sintered ore here. Temperature, preferably, the temperature measuring probe can be a thermocouple temperature sensor. When the detected sinter temperature at a certain position in the circumferential direction reaches the cooling effect, the discharge gate corresponding to this area is normally opened under the cone of the tower to carry out normal discharge, otherwise, the discharge gate is correspondingly lowered The height of the opening or close the discharge gate, let the sinter in this area cool for a period of time, when the temperature of the sinter reaches the cooling effect, the normal discharge is carried out.

Preferably, the wind ring air supply device is composed of an air ring air channel and an air ring air pipe. The air ring air channel is arranged on the outside of the air ring to surround the air ring. The cooling air can be evenly supplied to the air ring through the air ring air channel. Wind, the air ring air pipe is connected with the air ring air duct, and supplies wind to the air ring air duct.

Preferably, the hood air supply device is composed of a hood branch pipe, a hood air duct and a hood air duct. Several hood branch pipes are evenly arranged along the circumferential direction. Preferably, each hood branch pipe passes through the wall of the cone of the tower body to connect with the stem of the hood, or bends downwards to connect with the bottom of the hood. The hood duct is responsible for uniformly supplying air to each hood branch. The hood duct is responsible for supplying air to the hood duct.

The hot sinter crushed by the single-roller crusher is transported to the top of the vertical cooler by the hot sinter conveying device, and then enters the bin of the vertical cooler. The sinter flows continuously from top to bottom under the action of gravity. The silo and distribution pipe of the vertical cooler are naturally accumulated in the tower body, and conduct countercurrent heat exchange with the bottom-up cooling air in the machine. After the sinter temperature is cooled to below 150°C, it passes through the tower body at the lower part of the vertical cooler. Then it is discharged into the discharge channel (such as the lower chute) through the discharge gate, and then discharged from the end or below of the discharge channel to the cold sinter conveying device, and then the cooled sinter is conveyed by the cold sinter conveying device The ore is transported to the next process.

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

Preferably, the equipment also has a self-feedback discharge adjustment function. The temperature of the sinter in the corresponding area is detected by the temperature probe. When the temperature of the detected sinter in a certain position in the circumferential direction reaches the cooling effect, the discharge gate corresponding to the area under the cone of the tower is normally opened for normal discharge. On the contrary, reduce the opening height of the discharge gate or close the discharge gate accordingly, let the sinter in this area cool down for a period of time, and then proceed to normal discharge after the sinter temperature reaches the cooling effect.

The surface of high-temperature pellet-shaped sintered ore is viscous, and once it cools, it sticks to each other. The equipment in the prior art often causes difficulty in discharging materials, but the equipment of the utility model solves this problem well.

Generally, the height of the tower body consisting of the top cover and the tower wall, the tower body cone below the tower wall and the tower bottom is generally 4-25 meters, preferably 5-22 meters, more preferably 6-20 meters, and more preferably 7-18 meters, more preferably 8-15 meters, more preferably 9-14 meters. The outer diameter of the tower body is generally 8-30 meters, preferably 9-27 meters, preferably 10-25 meters, preferably 11-22 meters, more preferably 12-20 meters, further preferably 13-18 meters, such as 15 meters.

In this application, the diameter of the hood is generally 1-5 meters, preferably 1.5-4 meters, preferably 1.8-3.5 meters, more preferably 2-3 meters, even more preferably 2.2-2.8 meters, such as 2.5 meters.

In this application, the diameter or inner diameter of the wind ring is generally 5-30 meters, preferably 7-26 meters, preferably 8-24 meters, preferably 9-22 meters, preferably 10-20 meters, more preferably 12-15 meters.

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

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

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

The process of the utility model has the advantages of slow sinter cooling speed, small cooling air volume per ton consumption, relatively small waste gas volume, high waste gas temperature, high boiler thermal efficiency, all cooling waste gas can be used by the boiler, and the sensible heat recovery rate of sinter can generally reach 70. % around cooling characteristics. Moreover, this process can also overcome the problem of secondary sintering of sintered ore in the vertical cooling device, and prevent the vertical cooling device from being blocked.

In the equipment of the utility model, the material distribution is uniform, the material discharge is uniform, and the air distribution is uniform. It can also adjust the area discharge according to the cooling effect, so the cooling effect of the cooler is good, and the temperature of the hot air is high, which meets the requirements of the sinter countercurrent thick material layer cooling process.

Compared with the prior art annular cooler, the utility model vertical cooler has simple structure, reliable sealing, no air leakage, less equipment maintenance and high waste heat recovery efficiency. The sensible heat recovery rate of sinter can generally reach about 73%, which is the cooling characteristic.

1. The structure is simple, reducing equipment investment, and reducing the operating cost of the equipment;

2. The sealing of the device is good, the heat recovery efficiency of sinter is high, and high-temperature waste gas (hot air) is obtained to generate steam, which is used for power generation in the form of high-temperature steam, and the power generation efficiency is higher;

3. There is no clogging phenomenon in the discharge, which significantly reduces the frequency of shutdown and maintenance;

4. According to the detected temperature of the material above the cone of each tower body, the discharge speed of the discharge outlet can be adjusted by independently controlling the lifting of each discharge gate, and then the temperature can be adjusted.

Description of drawings

Fig. 1 is the structural representation of a kind of vertical cooler of the utility model;

Fig. 2 is a structural schematic diagram of the wind ring and the wind ring air supply device of the present invention;

Fig. 3 is the structure diagram of wind cap and wind cap air supply device of the utility model;

Fig. 4 is the layout diagram of the tower cone of the present invention;

Fig. 5 is the arrangement diagram of the temperature measuring probe of the utility model;

Figure 6 is a layout diagram of the discharge gate of the utility model;

Fig. 7 is a schematic structural view of the wind cap of the present invention.

Fig. 8 is a schematic diagram of the control system of the vertical cooling machine of the present invention.

Reference signs: A1: ram type vertical cooler; 1: silo; 2: distribution pipe; 3: top cover; 4: tower wall; 4a: tower wall transition section; 5: tower body cone; 5a: row Material outlet; 5b: optional (that is, optional) discharge outlet sealing cover; 6: air ring air supply device; 601: air ring air duct; 602: air ring air duct; 7: wind cap air supply Device; 701: hood branch; 702: hood air duct; 703: hood air duct; 8: hot air outlet; 9: temperature measuring probe; 10: discharge channel (such as feeding chute or discharge hopper); 11: cold sintering Mine conveying device; 12: discharge gate; H: wind ring; M: wind cap; M01: support frame; M02: top cover; M03: conical cover plate; M04: wind cap air duct; K: Control system.

h1: the height of the cone of the tower body; h2: the stacking height of the tower wall of the tower body.

Detailed ways

As shown in Fig. 1-7, according to the utility model, a kind of ram unloading type vertical cooling machine is provided, and this vertical cooling machine A1 comprises: feed bin 1, distributing pipe 2, by tower body top cover 3, Tower wall 4, the tower body that is positioned at tower body cone 5 below tower wall 4 and the tower body that tower bottom D forms, wind ring H, wind cap M, a plurality of discharging outlets 5a that are arranged on tower body cone 5 bottoms, and are arranged on The hot air outlet 8 on the top of the tower wall 4 or on the top cover of the tower body 3;

Wherein, the top cover 3 is fixedly connected with the upper end of the tower wall 4, the feed bin 1 is arranged above the top cover 3, the upper end of the distribution pipe 2 is connected with the bottom of the feed bin 1, and the lower end of the distribution pipe 2 extends into the bottom of the top cover,

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

Between the bottom of the tower wall 4 and the top of the tower body cone 5, a fixed gap of one week is formed as the wind ring H,

The central position of the tower bottom D is provided with a hood M extending upward into the inner space of the tower body, and

Each discharge outlet 5a is provided with a discharge gate 12 or a discharge gate 12 accordingly, and a discharge channel 10 is provided below the discharge gate 12; preferably, the discharge channel 10 is connected to each The discharge chute corresponding to the discharge outlet 5a or the discharge channel 10 is an integrally designed discharge hopper.

Generally, the wind cap M protrudes into the inner space of the tower so that the height of the wind cap air duct M04 (ie, the stem of the wind cap) is sufficient to reach the height of the wind ring H.

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

Preferably, a tower wall transition section 4 a is further provided at the lower part or below the tower wall 4 and above the tower cone 5 . In this way, it is more convenient to install the tower cone 5 at the bottom of the tower wall 4 . In this case, the tower body is formed by the tower head 3 , the tower wall 4 and the lower (inverted cone-shaped) tower wall transition section 4 a. The tower wall transition section 4a presents an inverted cone shape, ie its lower part has a smaller inner diameter than its upper part. It can also be called transition bucket or upper cone bucket. The cone angle of the inverted cone-shaped tower wall transition section 4a is generally 60-75 degrees, preferably >63.5 degrees.

The outer diameter of the lower end of the tower cone 5 is smaller than the outer diameter of the upper end. Therefore, the tower cone 5 presents an inverted cone shape or an inverted cone shape.

Generally, the vertical cooling machine A1 also includes an air ring air supply device 6, which includes an air ring air channel 601 and an air ring air pipe 602 connected to the air ring air channel 601. The air duct 601 surrounds the air ring H and communicates with it.

Generally, the vertical cooling machine A1 also includes a hood air supply device 7, and the hood air supply device 7 includes a plurality of hood branch pipes 701, an annular or "C" shaped hood air duct 702 and a hood air duct connected to the hood air duct 702 703 , one end of each hood branch pipe 701 communicates with the hood air channel 702 and the other end communicates with the bottom or stem of the hood M. The stem described here is the hood duct M04. The hood air duct 703 is connected to a blower so as to supply air to the hood air duct 702 .

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

The height h1 of the tower cone 5 is greater than the stacking height h2 of the tower wall 4

Generally, the number of discharge outlets 5a at the lower part of the tower cone 5 is 4-12, preferably 6-10, 6-8.

Generally, the number of hood branch pipes 701 is 1-12, preferably 2-10, more preferably 4-8, more preferably 6-8. Preferably, the hood branch pipe 701 is bent downwards and connected to the bottom of the hood M, or the hood branch pipe 701 passes through the wall of the tower cone 5 and is connected to the stem of the hood M, that is, the hood air pipe 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 duct M04, and a plurality of conical cover plates M03 are sequentially arranged on the support frame M01, from top to bottom, conical The diameter of the bottom of the conical cover M03 increases sequentially; the hood top cover M02 is set above the topmost conical cover M03, and the air duct M04 is set below the support frame M01 and connected to the support frame M01. Preferably, the top cover M02 of the wind cap is a tapered structure.

Preferably, the vertical cooler A1 also includes a control system K, 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 discharge gate 12, and the cold sinter conveying device 11, and Control the operation of the air ring air supply device 6, the wind cap air supply device 7, the temperature measuring probe 9, the discharge gate 12, and the cold sinter conveying device 11.

According to the utility model, there is also provided a method for cooling sinter or a method for cooling sinter by using the above-mentioned ram discharging vertical cooler, the method includes the following steps:

(1) The sintered ore enters the bin 1 of the vertical cooler A1, flows continuously from top to bottom under the action of gravity, and accumulates in the tower body of the cooler through the distribution pipe 2;

(2) The wind ring air supply device 6 and the air cap air supply device 7 of the vertical cooler A1 transport the cooling gas (that is, cold wind or air) into the tower body through the wind ring H and the wind cap M respectively, and the cooling gas passes through from bottom to top The layer of sintered ore accumulated in the tower body conducts countercurrent heat exchange with the sintered ore. After the heat exchange, the temperature of the cooling gas gradually rises and is discharged from the surface of the sintered ore in the vertical cooler A1 tower to form high-temperature hot air. The high-temperature hot air passes through The hot air outlet 8 is discharged; preferably, the high-temperature hot air is delivered to a waste heat utilization system (such as a waste heat power generation system);

(3) The sintered ore accumulated in the tower body of the cooling machine is cooled by countercurrent heat exchange with the cooling gas from bottom to top, and enters the tower body cone 5 at the lower part of the vertical cooler A1, and then from the tower body cone A plurality of discharge outlets 5 a at the bottom of the drum 5 discharges and then discharges via a discharge channel 10 (for example onto a cold sinter conveying device 11 ).

Preferably, according to the temperature detected by the temperature measuring probe 9, the control system K controls the operation of the air ring air supply device 6, the hood air supply device 7, the discharge gate 12 or the discharge gate 12 and the cold sinter conveying device 11.

Preferably, a temperature measuring probe 9 is set corresponding to each discharge outlet 5a, and according to the temperature detected by each temperature measuring probe 9, the control system K controls the operation of the corresponding discharge gate 12 or discharge gate 12, for example Up and down movement. Through the lifting or opening and closing of the discharge gate 12 or the discharge gate 12, the temperature of the material above it is adjusted.

Preferably, in the vertical cooler A1, the height h1 of the tower cone 5 is greater than the stacking height h2 of the tower wall 4 .

In the utility model, the material is discharged through the discharge gate from the inside to the outside at the bottom of the tower cone 5, which can minimize the difference in the discharge speed of the material at the center and edge of the vertical cooling tower. The cooled sinter discharged from the discharge gate flows into the discharge channel below (such as the lower chute), and then flows out from the lower outlet of the discharge channel (such as the lower chute), and flows into the conveyor below it. transported to the next process. After the cooling air entering the tower body undergoes heat exchange with the hot sinter, it cools the hot sinter to below 150°C, and itself is heated to a higher temperature to become hot air. The hot air passes through the material layer and then passes through the material layer at the top It enters the material-free area at the upper end of the tower body formed by the top cover and the tower wall, and then is discharged through the hot air outlet to enter the subsequent waste heat power generation system.

The silo is a cylindrical or square barrel structure, which is used to buffer the hot sinter transported by the conveyor, and the bottom of the silo is fixedly connected to the top cover. The distributing pipe is a cylindrical or square barrel-shaped structure, located at the bottom of the silo, its upper end is fixedly connected with the bottom of the silo, and its lower end extends below the top cover, and is located inside the tower body composed of the top cover and the tower wall. The sintered ore can be Under the action of gravity, it enters into the distribution pipe from the bottom of the silo, and can freely flow out from the lower opening of the distribution pipe under the action of gravity. The tower wall is a cylindrical or square barrel-shaped structure, its upper end is fixedly connected to the top cover, and a fixed gap is formed between the lower end of the tower wall and the cone of the tower body, which is the wind ring, and a certain part in the middle is fixed on the foundation Above, the weight of the top cover is carried on the tower wall for a week. The air ring is a circular cavity formed between the tower wall and the tower body cone. The cooling air can be evenly blown into the sintered ore in the tower body through a ring of air ring to cool the sintered ore. The wind ring air supply device can supply wind to the wind ring. The air cap is located at the lower part of the tower wall and is located on the cone of the tower body. The cooling air can be evenly blown into the sintered ore in the tower body through the air cap around to cool the sintered ore. The cone of the tower body is located at the lower end of the tower wall and is fixed to the foundation. At the same time, a wind ring is formed between the tower wall and the wind cap is fixed at its upper end. Preferably, the shape of the cone of the tower body is a conical structure with a large top and a small bottom. The cooled sinter flows into the cone of the tower body under the action of gravity. The material in the tower cone can control the discharge speed of the corresponding material outlet of the tower cone through the up and down movement of each discharge gate. Generally, the hot air outlet is located on the upper part of the tower wall, fixedly connected with the tower wall, and communicated with the inside of the tower body. The material area, and then discharged through the hot air outlet, and then enters the subsequent waste heat power generation system.

Preferably, several temperature measuring probes are evenly arranged along the circumference at the lower part of the tower wall, which are located at the upper part of the wind ring, fixed on the tower wall, and one end of which extends into the tower body for a short period to detect the temperature of the sintered ore here. Temperature, preferably, the temperature measuring probe can be a thermocouple temperature sensor. When the detected sinter temperature at a certain position in the circumferential direction reaches the cooling effect, the discharge gate corresponding to this area is normally opened under the cone of the tower to carry out normal discharge, otherwise, the discharge gate is correspondingly lowered The height of the opening or close the discharge gate, let the sinter in this area cool for a period of time, when the temperature of the sinter reaches the cooling effect, the normal discharge is carried out.

Preferably, the wind ring air supply device is composed of an air ring air channel and an air ring air pipe. The air ring air channel is arranged on the outside of the air ring to surround the air ring. The cooling air can be evenly supplied to the air ring through the air ring air channel. Wind, the air ring air pipe is connected with the air ring air duct, and supplies wind to the air ring air duct.

Preferably, the hood air supply device is composed of a hood branch pipe, a hood air duct and a hood air duct. Several hood branch pipes are evenly arranged along the circumferential direction. Preferably, each hood branch pipe passes through the wall of the cone of the tower body to connect with the stem of the hood, or bends downwards to connect with the bottom of the hood. The hood duct is responsible for uniformly supplying air to each hood branch. The hood duct is responsible for supplying air to the hood duct.

The hot sinter crushed by the single-roller crusher is transported to the top of the vertical cooler by the hot sinter conveying device, and then enters the bin of the vertical cooler. The sinter flows continuously from top to bottom under the action of gravity. The silo and distribution pipe of the vertical cooler are naturally accumulated in the tower body, and conduct countercurrent heat exchange with the bottom-up cooling air in the machine. After the sinter temperature is cooled to below 150°C, it passes through the tower body at the lower part of the vertical cooler. Then it is discharged into the discharge channel (such as the lower chute) through the discharge gate, and then discharged from the end or below of the discharge channel to the cold sinter conveying device, and then the cooled sinter is conveyed by the cold sinter conveying device The ore is transported to the next process.

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

Preferably, the equipment also has a self-feedback discharge adjustment function. The temperature of the sinter in the corresponding area is detected by the temperature probe. When the temperature of the detected sinter in a certain position in the circumferential direction reaches the cooling effect, the discharge gate corresponding to the area under the cone of the tower is normally opened for normal discharge. On the contrary, reduce the opening height of the discharge gate or close the discharge gate accordingly, let the sinter in this area cool down for a period of time, and then proceed to normal discharge after the sinter temperature reaches the cooling effect.

The surface of high-temperature pellet-shaped sintered ore is viscous, and once it cools, it sticks to each other. The equipment in the prior art often causes difficulty in discharging materials, but the equipment of the utility model solves this problem well.

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

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

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

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

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

Example 1

The height of the tower body consisting of the top cover and the tower wall of the cooling machine is 9 meters. The outer diameter of the tower body is 13 meters. The diameter of the hood is 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 processing capacity of sinter is 8650 tons/day. The temperature of the sintered ore before entering the feed bin is 700°C, and the hot blast temperature at the hot blast outlet 8 reaches 500°C. The recovered heat is used to generate electricity, and the power generation is about 35 kWh.

Compared with the ring cooler of the prior art, the advantages are: high power generation, low air leakage rate, small dust emission, simple and reliable equipment, and better sealing performance, the technology of the utility model can provide higher temperature hot air for High-temperature steam is generated, which significantly improves power generation efficiency.

Claims (22)

1. A ram discharge type vertical cooler, the vertical cooler (A1) comprises: a feed bin (1), a material distribution pipe (2), a tower top cover (3), a tower wall (4) 1. The tower body consisting of the tower body cone (5) and the tower bottom (D) below the tower wall (4), the wind ring (H), the wind cap (M), and the multi-holes arranged at the bottom of the tower body cone (5) A discharge outlet (5a), and a hot blast outlet (8) arranged on the top 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 feed bin (1) is arranged above the top cover (3), and the upper end of the distribution pipe (2) is connected with the bottom of the feed bin (1), The lower end of the cloth pipe (2) stretches into the below of the top cover, The plurality of discharge outlets (5a) presents an annular distribution around the lower part of the tower body cone (5) or the plurality of discharge outlets (5a) are evenly distributed along the circumferential direction of the lower part of the tower body cone (5). distributed, A fixed gap of one week is formed between the bottom of the tower wall (4) and the top of the tower cone (5) as a wind ring (H), The central position of the tower bottom (D) is provided with a wind cap (M) extending upward into the inner space of the tower body, and A discharge gate (12) is correspondingly provided at each discharge outlet (5a), and a discharge passage (10) is provided below the discharge gate (12); Wherein: the height of the tower body that is made of tower body top cover (3) and tower wall (4), the tower body cone tube (5) that is positioned at the tower body (4) below and tower bottom (D) is 4-25 meter. 2. The ram discharge type vertical cooler according to claim 1, characterized in that: the discharge channel (10) is a discharge chute corresponding to each discharge outlet (5a) or the discharge Passage (10) is a discharge hopper of overall design. 3. The ram discharge type vertical cooler according to claim 1 or 2, characterized in that: a cold sinter conveying device (11) is provided at or below the discharge channel (10); and/or A tower wall transition section (4a) is further provided at the lower part or below the tower wall (4) and above the tower body cone (5). 4. The vertical cooling machine according to claim 1 or 2, characterized in that the vertical cooling machine (A1) also includes an air ring air supply device (6), and the air ring air supply device (6) includes an air ring The air duct (601) and the air ring air pipe (602) connected to the air ring air duct (601), the air ring air duct (601) surrounds the air ring (H) and communicates with it. 5. The vertical cooling machine according to claim 3, characterized in that the vertical cooling machine (A1) also includes an air ring air supply device (6), and the air ring air supply device (6) includes an air ring air duct (601) and the wind ring duct (602) connected to the wind ring duct (601), the wind ring duct (601) surrounds the wind ring (H) and communicates with it. 6. The vertical cooling machine according to claim 1, 2 or 5, characterized in that the vertical cooling machine (A1) also includes a hood air supply device (7), and the hood air supply device (7) includes a plurality of Wind cap branch pipe (701), annular or "C" shaped wind cap air duct (702) and wind cap air duct (703) connected with wind cap air duct (702), one end of each wind cap branch pipe (701) is connected with wind cap air duct ( 702) and the other end communicates with the bottom or stem of the hood (M). 7. The vertical cooling machine according to claim 3, characterized in that the vertical cooling machine (A1) also includes a hood air supply device (7), and the hood air supply device (7) includes a plurality of hood branch pipes (701 ), the annular or "C" shaped hood air duct (702) and the hood air duct (703) connected with the hood air duct (702), one end of each hood branch pipe (701) communicates with the hood air duct (702) and The other end communicates with the bottom or stem of the hood (M). 8. The vertical cooling machine according to claim 4, characterized in that the vertical cooling machine (A1) also includes a hood air supply device (7), and the hood air supply device (7) includes a plurality of hood branch pipes (701 ), the annular or "C" shaped hood air duct (702) and the hood air duct (703) connected with the hood air duct (702), one end of each hood branch pipe (701) communicates with the hood air duct (702) and The other end communicates with the bottom or stem of the hood (M). 9. The vertical cooler according to any one of claims 1, 2, 5, 7 or 8, characterized in that a temperature measuring probe (9) is provided at the lower part of the tower wall (4). 10. The vertical cooler according to claim 4, characterized in that a temperature measuring probe (9) is provided at the lower part of the tower wall (4). 11. The vertical cooler according to claim 6, characterized in that a temperature measuring probe (9) is provided at the lower part of the tower wall (4). 12. The vertical cooling machine according to claim 9, characterized in that: the temperature measuring probe (9) is a thermocouple temperature sensor. 13. The vertical cooling machine according to claim 10 or 11, characterized in that: the temperature measuring probe (9) is a thermocouple temperature sensor. 14. According to any one of claims 1, 2, 5, 7, 8 or 10-12, the ram discharge type vertical cooler is characterized in that: the number of discharge outlets (5a) is 4 -12; and/or The number of hood branch pipes (701) is 1-12. 15. The ram discharge type vertical cooler according to claim 4, characterized in that: the number of discharge outlets (5a) is 4-12; and/or The number of hood branch pipes (701) is 1-12. 16. The ram discharge type vertical cooler according to claim 6, characterized in that: the number of discharge outlets (5a) is 4-12; and/or The number of hood branch pipes (701) is 1-12. 17. The ram discharge type vertical cooler according to claim 14, characterized in that: the number of discharge outlets (5a) is 6-10; and/or The number of hood branch pipes (701) is 2-10; the hood branch pipes (701) are bent downwards and connected to the bottom of the hood (M) or pass through the wall of the tower cone (5) to connect to the stem of the hood (M) . 18. The ram discharge type vertical cooler according to any one of claims 1, 2, 5, 7, 8, 10-12 or 15-17, characterized in that: the wind cap (M) includes Support frame (M01), hood top cover (M02), multiple conical cover plates (M03) and hood air duct (M04), multiple conical cover plates (M03) are arranged on the support frame (M01) in sequence, from From top to bottom, the bottom diameter of the conical cover plate (M03) increases sequentially; the top cover of the hood (M02) is set above the top conical cover plate (M03), and the air duct (M04) is set on the support frame (M01) below and connected to the support frame (M01). 19. The ram discharge type vertical cooler according to claim 4, characterized in that: the wind cap (M) includes a support frame (M01), a wind cap top cover (M02), a plurality of conical cover plates ( M03) and hood air duct (M04), a plurality of conical cover plates (M03) are arranged on the support frame (M01) in sequence, and the diameter of the bottom of the conical cover plates (M03) increases sequentially from top to bottom; the top of the hood The cover (M02) is arranged above the topmost conical cover plate (M03), and the air duct (M04) is arranged below the support frame (M01) and connected with the support frame (M01). 20. The ram discharge type vertical cooler according to claim 6, characterized in that: the wind cap (M) includes a support frame (M01), a wind cap top cover (M02), a plurality of conical cover plates ( M03) and hood air duct (M04), a plurality of conical cover plates (M03) are sequentially arranged on the support frame (M01), and from top to bottom, the diameter of the bottom of the conical cover plates (M03) increases sequentially; the top of the hood The cover (M02) is arranged above the topmost conical cover plate (M03), and the air duct (M04) is arranged below the support frame (M01) and connected with the support frame (M01). 21. The ram discharge type vertical cooler according to claim 18, characterized in that: the wind cap top cover (M02) is a conical structure. 22. The ram discharge type vertical cooler according to claim 13, characterized in that: the vertical cooler (A1) also includes a control system (K), the control system (K) and the air ring air supply device (6), wind cap air supply device (7), temperature measuring probe (9), discharge gate (12), cold sinter conveying device (11), and control the air ring air supply device (6), wind cap air supply Operation of device (7), temperature measuring probe (9), discharge gate (12), cold sinter conveying device (11).