CN107179003B

CN107179003B - Split-driven groove type liquid seal blast cooling device and method for sintering mine

Info

Publication number: CN107179003B
Application number: CN201610139118.1A
Authority: CN
Inventors: 贺新华; 温荣耀; 向锡炎
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2016-03-11
Filing date: 2016-03-11
Publication date: 2023-06-23
Anticipated expiration: 2036-03-11
Also published as: CN107179003A

Abstract

The utility model provides a slot type liquid seal blast cooling device (1) for sintering mine that components of a whole that can function independently was driven, two sides are unloaded, this device includes: 1) a ring groove-shaped stacking box body, wherein the box body comprises an inner ring wall (2), an outer ring wall (3) and a whole circle of ring-shaped tray (4) at the bottom; 2) A first wheel rail driving device (5) and a second wheel rail driving device (6) of the box body; 3) An annular hood (8) at the upper part of the box body; 4) At least one air outlet duct (21, 22) connected to the top of the hood (8); 5) The inner and outer airtight annular air inlet chambers (11') and (11) and (6) are provided with a liquid sealing device (14), so that the liquid sealing device (14) forms a sealing effect with the inner annular box body wall (2) and the outer annular box body wall (3) of the rotary annular stacking box body; 7) A plurality of blowers (9, 8) are mounted to the doctor blade apparatus (L) inside and outside the discharge section (1 a) of the cooling device (1), and a plurality of lower air intake apparatuses (K) are located within the lower space of the housing but above the doctor blades. The cooling device (1) has outstanding advantages in terms of manufacturing cost, reduction of environmental pollution and waste heat utilization.

Description

Split-driven groove type liquid seal blast cooling device and method for sintering mine

Technical Field

The invention relates to a split-driven double-side unloading trough type liquid seal blast cooling device and a cooling method for a sintering mine, belonging to the field of iron making and the field of environmental protection.

Background

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. And in case 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.

Aiming at the five defects, the process technology and the device technology of the 'induced draft type longitudinal disc cooling technology' are deeply analyzed, a set of patent scheme technology which can not increase the height of a cooler, realize closed circulation of wind current, ensure high yield of sinter and greatly relieve environmental pollution beside the machine is developed through repeated fumbling and improved optimization, and the problems existing in the prior art are solved effectively, and the method contributes to energy-saving and environment-friendly indexes of the sintering process.

Disclosure of Invention

According to a first embodiment of the present application, a (ring-shaped) trough-type liquid-tight blast cooling device for sintering (split double-drive and double-side discharge) is provided,

a slot cooler or annular cooling device for short, the device comprising:

1) A ring-shaped accumulation box (i.e., a full-circle annular groove-shaped box) for accumulating the sinter from the sintering machine from above and discharging the sinter from an inner peripheral annular discharge opening and an outer peripheral annular discharge opening (i.e., a full-circle annular inner discharge opening and a full-circle annular outer discharge opening, which are abbreviated as inner and outer side discharge openings) at the same time, wherein the box comprises an inner annular wall, an outer annular wall and a full-circle annular tray at the bottom;

2) A first wheel-rail driving device and a second wheel-rail driving device for driving the ring-shaped accumulation box body to do rotary motion (or complete ring motion) in the horizontal direction;

3) An annular hood (or called a hood) provided to the annular stacker to cover an upper portion of the stacker;

4) At least one air outlet duct (preferably, at least two air outlet ducts, for example, 1 to 10, such as 2 to 6 or 2 to 4) connected to the top of the hood; preferably, at least two air outlet pipelines are connected with the top of the hood, wherein the at least two air outlet pipelines comprise a first air outlet pipeline close to the box body unloading section and a second air outlet pipeline far away from the box body unloading section;

5) By adding an inner peripheral sealing cover and an outer peripheral sealing cover along the inner periphery and the outer periphery of the box body at the lower part of the groove type liquid seal blast cooling device, an inner ring-shaped air inlet chamber and an outer ring-shaped air inlet chamber (or: an inner air inlet chamber and an outer air inlet chamber);

6) Liquid sealing devices are arranged at the upper part and the lower part (for example, at the bottom of a tray) of each air inlet chamber at the inner side and the outer side, so that a sealing effect is formed between the liquid sealing devices and the inner ring box wall and the outer ring box wall of the rotary ring-shaped stacking box body;

7) The air outlets of the blowers are respectively communicated with the outer sealed annular air inlet chamber and/or the inner sealed annular air inlet chamber through corresponding air inlet pipes; and

8) Doctor devices (one or more doctor devices each independently) mounted on the inner side of the (ring) and the outer side of the (ring) of the discharge section of the (ring) cooling device, the latter being enclosed in an inner closed annular air inlet chamber and an outer closed annular air inlet chamber by an inner and an outer two (full circle) annular sealing hoods, respectively;

9) Optionally or optionally, a plurality of lower air intake devices located within the lower space of the housing but above the blades of the doctor device; preferably, the air inlet equipment at the lower part is an air inlet beam, a shutter or an air inlet pipe;

Wherein: the blades of the inner and outer doctor devices do not extend into the bottom (full circle) annular inner and outer (i.e., inner and outer sides) discharge openings of the tank, i.e., the extending depths of the blades of the inner and outer doctor devices in the cross-sectional direction of the tank are respectively standardized to be no more than the inner or outer annular wall inner wall surface of the cooling device, or the blades of the inner and outer doctor devices extend into the bottom (full circle) annular inner and outer side discharge openings of the tank, respectively, preferably, the ends of the inner and outer side blades are respectively close to the outer or inner annular wall.

The sealing action of the air inlet chamber not only depends on the liquid sealing devices at the upper part and the lower part, but also depends on the material sealing action, namely the material sealing. The material seals comprise a (sintered ore) material seal in the box body and a (sintered ore) material seal in the blanking chute (or the discharging chute).

Typically, the first or second wheel-rail drive comprises a roller and a rail. Wherein the roller comprises a drive wheel and optionally a driven wheel. The drive wheel is powered or driven by an electric motor. The rail is supported on the rollers. The track may be fixed to the bottom (e.g., the bottom of the tray), sides, or upper (hanging) portion of the case.

Typically, the first wheel-rail drive is used to drive the bottom tray. The second wheel track driving device is used for driving the inner annular wall and the outer annular wall of the box body. The box body and the tray are driven respectively by adopting a split double-driving mode. Preferably, the inner annular wall, the outer annular wall and the whole circle of annular tray at the bottom are connected without adopting a plurality of T-shaped brackets in the box body. Of course, the three can also be connected by a plurality of T-shaped brackets in the box body.

Wherein, the two ends of the lower air inlet device are respectively arranged or fixed on the inner annular wall and the outer annular wall. The air inlet opening end of the air inlet device (such as an air inlet beam, a shutter or an air inlet pipe) is communicated with the outer annular closed air inlet chamber and/or the inner annular closed air inlet chamber.

Preferably, the first wheel-rail drive (or system) is provided at the bottom of the pallet. The first wheel-rail driving apparatus includes: the device comprises a roller (support or drive), at least two or at least a pair of (annular or whole-circle annular) guide rails arranged at the bottom of a tray, a motor, a coupler, a speed reducer, a rotating shaft and a support.

Wherein the second wheel rail driving device is arranged at the side part of the box body. Preferably, the second wheel-rail driving apparatus includes: at least two or at least one pair of guide rails, a motor, a coupling, a decelerator, a rotating shaft, and a support, which are respectively installed inside and outside (i.e., sides of the inner and outer annular walls) of the (annular or full-circle annular) case body and supported and/or driven by the rollers, which serve as a support and/or driving function.

In general, a plurality of brackets or posts are provided on the (ring) inner side and the (ring) outer side of a ring-shaped stacker (or referred to as a ring-shaped or full-ring-shaped stacker), respectively. The guide rails are mounted inside and outside the rings (i.e., the sides of the inner and outer annular walls) of the (annular or full-circle annular) case. And the rollers or driving rollers are mounted on the brackets or uprights. Correspondingly, for the bracket or the upright post provided with the driving roller, a motor, a coupling, a speed reducer, a rotating shaft and a support which are matched with the driving roller are also arranged on the side bracket of the bracket or the upright post.

In the discharge section of the cooling device, a feed chute is mounted above the ring-groove-shaped accumulation box. A material scraping sheet is arranged at the downstream of the feeding chute.

The cooling device further includes: and the top cover of the groove cooling machine is arranged at the top of the groove cooling machine. When the groove cooling machine is installed, the lifting opening is firstly lifted to a certain position, then the groove cooling machine is moved to a production appointed position by means of the roller for installing the top cover, and the top cover of the groove cooling machine is not moved after the groove cooling machine is put into production (namely, the groove cooling machine is in rotary motion when the box body is in rotary motion). The top cover of the groove cooling machine is supported by a top cover installation roller which is installed on a bracket or a pillar.

Preferably, the first air outlet duct is connected to a waste heat boiler of the power plant, while the second air outlet duct is connected in a switchable manner via a pipe to a waste heat boiler of the power plant or directly to an air inlet of the blower via a bypass. More preferably; and a gravity dust removing device is arranged at the upstream of the gas path of the waste heat boiler, namely, the first air outlet pipeline and/or the second air outlet pipeline are communicated to the waste heat boiler of the power generation device through the gravity dust removing device. Preferably; a cloth bag dust remover and an optional coal economizer are sequentially arranged at the downstream of the gas path of the waste heat boiler. The air outlet of the bag dust collector or the economizer is communicated with the air inlet of each blower. Thus, the closed circulation of wind current is realized. Because the invention adopts the closed blowing process, the closed circulation of the wind current can be realized. The technology adds a cloth bag dust collector and an economizer (which can be opened or closed according to the situation) at the rear part of the original working procedure, and recycles the air after the waste heat boiler to blow into the annular air inlet chamber to serve as cooling air after fine particle dust removal. The whole process is realized without sensible heat waste and particulate matter atmosphere discharge.

Preferably, the scraper device is arranged upstream of the discharge section and is equipped with one or more scraper devices each independently on the inside and outside of the discharge section, while the feed chute is located downstream of the discharge section. Thus, high temperature iron ore material from the sintering tail is added to the recessed or settled portion after discharging. And then the material is scraped by a material scraping sheet. The scraper extends into the bottom of the box body from a (annular) discharge opening at the bottom of the box body of the cooling device.

Preferably, a buried seal is employed. Because the invention changes the air draft into the air blast, the main position for preventing the air from flowing is changed from the upper part of the material layer to the lower part of the material layer. The discharge openings on the inner side and the outer side of the discharge section are respectively provided with a discharge chute and an electric vibration feeder, and the whole discharge chute is preferably buried in the ground (below).

Preferably, a plurality of pressure relief and ventilation devices, such as bypass air blow-off pressure relief devices, are arranged outside the outer annular wall; and optionally, a plurality of pressure relief and ventilation devices, preferably a plurality of bypass air blow-by pressure relief devices, are arranged outside the inner annular wall (i.e. the inner side of the annular box). One end (such as the lower end) of a pressure relief and ventilation device (such as a bypass air-flowing pressure relief device) of the outer annular wall is communicated with the outer closed annular air inlet chamber, and the other end (such as the upper end) is communicated with the external environment of the box body (namely, the external atmosphere environment of the box body) or air inlet equipment (such as an air inlet beam, a shutter or an air inlet pipe) positioned in the upper space of the box body; and optionally, one end of a pressure relief and ventilation device (preferably, a bypass air-blowing pressure relief device) of the inner annular wall is communicated with the inner closed annular air inlet chamber, and the other end of the pressure relief and ventilation device is communicated with the environment outside the box body or is communicated with air inlet equipment (N) positioned in the upper space of the box body. Preferably, a plurality of (upper) air intake devices (for example, upper air intake beams, louvers, air intake pipes, and other devices) are provided in the upper space of the case, and are respectively communicated with the upper ends of a plurality of pressure relief and ventilation devices (for example, bypass air flow relief devices), for example, a plurality of upper air intake beams. Preferably, the bypass air-flowing pressure relief device of the outer annular wall or the bypass air-flowing pressure relief device of the inner annular wall comprises a bypass air pipe, a rotating shaft, an air shielding plate, rollers and a horizontal annular track (called a special-shaped track) with downward concave deformation at a discharging section. Preferably, the lower air intake beam (K) or the air intake duct (K), and/or the upper air intake beam or the air intake duct, have a cross section of a circle, an ellipse, a ring or a polygon (e.g. a triangle or a quadrilateral or a pentagon). Preferably, side (inclined) through holes are formed on two or more sides of the lower air inlet beam (K) or the air inlet pipe (K) and/or the upper air inlet beam or the air inlet pipe and downward through holes are formed on the bottom side. That is, the side through holes are inclined downward, while the downward through holes are directed downward. These through holes are air outlet holes.

Preferably, two ends of the air inlet device arranged in the upper space of the box body are respectively arranged on the inner annular wall and the outer annular wall. In general, the air inlet device can be arranged horizontally or obliquely. The air inlet opening end of the air inlet equipment (such as an air inlet beam, a shutter or an air inlet pipe) is communicated with the upper end of the pressure relief and ventilation device (such as a bypass air-crossing pressure relief device).

In a normal state, the roller of the bypass air-blowing pressure relief device runs horizontally, and air tightly combined between the air shielding plate and the bypass air pipe cannot enter. When the material is discharged through the discharging area, due to the influence of downward depression of the special-shaped track, the roller walks downwards and pulls the air shielding plate at the same time, so that one end of the air shielding plate rotates by taking the rotating shaft as the center of a circle to be separated from the bypass air pipe, namely, the material is in an open state, and at the moment, air in the annular air inlet chamber can enter the bypass air pipe to enter the air inlet beam N positioned at the upper part of the material column of the groove-type liquid-sealed air-blast cooling device. The advantage of doing so is that the pressure relief is formed in the unloading area, so that the air pressure in the area is not as great as that in other areas, thereby reducing the possibility of air passing through the outer strings of the buried seal, and providing assistance in reducing the height of the buried seal from the viewpoint of changing.

Preferably, a plurality of brackets or struts are respectively erected on both sides of the annular-groove-shaped stacking box body of the cooling device. Limiting baffle wheels are arranged on two sides of the upper part of the ring groove-shaped stacking box body of the cooling device. Wherein the limit stop wheel is fixed on the bracket or the pillar.

The application also provides a sinter cooling method using the trough-type liquid seal blast cooling device for the sinter, which comprises the following steps: 1) the cooling device is driven by the first wheel-rail driving device and the second wheel-rail driving device to perform (whole circle) rotation, 2) iron ore materials (M) are scraped from discharge openings on the inner side of the bottom (ring) and the outer side (ring) of the box body of the cooling device (ring-shaped or whole circle) in the discharge section by means of scraper devices on the inner side and the outer side (ring-shaped), so as to be discharged (for example, scraped into a discharging chute), 3) sinter from the sintering machine is added into the ring-shaped accumulation box body from the feeding chute (preferably, the materials are scraped by a material scraping sheet later), and 4) hot air discharged from at least one air outlet pipeline (preferably at least two air outlet pipelines) connected with the top of the hood is conveyed to a waste heat boiler of the power generation device through pipelines.

Preferably, step 4) comprises the sub-steps of: 4.1 Hot air G1 discharged from the first air outlet duct is ducted to the waste heat boiler of the power generation apparatus, 4.2) lower temperature hot air G2 discharged from the second air outlet duct is ducted to the waste heat boiler of the power generation apparatus when the temperature of G2 is sufficiently high (i.e., sufficient for the waste heat boiler of the power generation apparatus), or is ducted to the air intake of the blower of the slot cooler via the bypass when the temperature of G2 is low.

In the above method, it is preferable that the hot air G1 and/or G2 is transported to the exhaust heat boiler of the power generation apparatus after dust is removed via the gravity dust removing apparatus, respectively.

Preferably, the low-temperature air G3 discharged from the waste heat boiler is further removed of dust through a bag-type dust collector, and then is fed to the air inlets of the respective blowers of the slot-cooling machine after further waste heat utilization through an economizer or without passing through the economizer. Thus, the closed circulation of wind current is realized. Because the invention adopts the closed blowing process, the closed circulation of the wind current can be realized. The technology adds a cloth bag dust collector and an economizer (which can be opened or closed according to the situation) at the rear part of the original working procedure, and recycles the air after the waste heat boiler to blow into the annular air inlet chamber to serve as cooling air after fine particle dust removal. The whole process is realized without sensible heat waste and particulate matter atmosphere discharge.

In operation, the tank is rotated about the circumference of rotation (or circumference of rotation) of the slot cold machine. The perimeter of revolution (2 pi R) of the tank is generally 60-350 meters, preferably 70-320 meters, preferably 80-300 meters, preferably 90-280 meters, more preferably 120-250 meters, such as 150-200 meters.

The height of the box of the trough-type liquid-tight blast cooling device for sintering use (i.e. the height from the bottom tray surface to the upper edge of the box) is 1.5-7.0 meters, preferably 2.5-6.5 meters, preferably 3.5-6 meters, more preferably 4-5.5 meters, more preferably 4.5-5.0 meters.

Compared with the conventional ring cooler technology and the disk cooler technology, as shown in fig. 1-9, the method mainly has the following five changes:

A1. novel closed air blast is adopted to replace the prior air draft: the invention cancels the air draft process, adopts the annular closed air chamber blast air inlet process instead, and forms an inner ring closed air inlet chamber 11 'and an outer ring closed air inlet chamber 11' by additionally arranging an inner peripheral sealing cover 11a 'and an outer peripheral sealing cover 11a at the inner periphery and the lower periphery of the groove type cooler and accumulating the outer rings of sintered materials, and the upper part and the lower part of the air inlet chambers 11' and 11 are respectively provided with a liquid sealing device 14 so as to form a sealing effect with the inner annular wall 2 and the outer annular wall 3 of the box body of the rotary groove type cooler (namely the groove type liquid sealing blast cooling device). Air is blown out from the blower 9, enters the closed annular air inlet chamber 11 and/or the air inlet chamber 11' after passing through the air inlet pipe 10, and can only enter the bottom of the material layer from the annular discharging opening at the lower part of the box body and the lower air inlet device (K) because the upper part and the lower part are sealed, and passes upwards in the material layer to be finally blown out from the material surface.

A2. The buried material seal is adopted: because the invention changes the air draft into the air blast, the main position for preventing the air from flowing is changed from the upper part of the material layer to the lower part of the material layer. The invention adopts a mode of burying the whole blanking chute 15 into the ground at the discharging opening. The blanking chute 15 is buried by locally digging a pit on the civil engineering plane, so that the whole height of the whole tank cooler is not raised, and excessive civil engineering foundation digging cost is not increased.

A3. Bypass air-blowing pressure relief devices 12 are additionally arranged on the inner side and the outer side of the box body: in order to further reduce the height of the buried material seal and reduce the construction and installation cost, the invention adds a bypass air-flowing pressure relief device 12 on the groove cooling machine. The device 12 consists of a bypass air pipe 1201, a rotating shaft 1202, an air shielding plate 1203, rollers 1204 and a special-shaped track 1205. In a normal state, the roller 1204 is running horizontally, and air tightly combined between the air shielding plate 1203 and the bypass air duct 1201 cannot enter. When passing through the unloading area, due to the influence of the downward depression of the special-shaped track 1205 in the unloading section, the roller 1204 walks downwards and pulls the air shielding plate 1203, so that one end of the air shielding plate 1203 rotates around the rotation shaft 1202 as the center of a circle to be separated from the bypass air pipe 1201, and at the moment, the air in the annular air inlet chamber 11 or 11' can enter the bypass air pipe 1201 to enter the air inlet beam N at the upper part of the material column of the slot cooler. The advantage of doing so is that the pressure relief is formed in the unloading area, so that the air pressure in the area is not as great as that in other areas, thereby reducing the possibility of air passing through the outer strings of the buried seal, and providing assistance in reducing the height of the buried seal from the viewpoint of changing.

A4. The closed circulation of wind flow is adopted: because the invention adopts the closed blowing process, the closed circulation of the wind current can be realized. The technology is characterized in that a bag-type dust collector 19 and an economizer 23 (which can be opened or closed according to the situation) are additionally arranged at the rear part of the original working procedure, and air after the waste heat boiler is subjected to fine particle dust removal is recycled and reused and blown into the annular air inlet chamber 11 to serve as cooling air. The whole process is realized without sensible heat waste and particulate matter atmosphere discharge.

A5. The multi-element wind taking device is additionally arranged: the invention is improved on the basis of the original air outlet device, and the multi-element air taking device is arranged, so that a user can freely adjust the air quantity entering the waste heat boiler according to the air temperatures of different sections of air outlets caused by different sinter characteristics, thereby ensuring that the thermal efficiency of the boiler is maintained in a higher range. As shown in fig. 2, the present invention at least sets an air outlet at two positions of the slot cooling machine near to the feeding port section and far from the feeding port section, which are a first air outlet pipe 21 and a second air outlet pipe 22 respectively. The air temperature of the air outlet pipe 21 is guaranteed due to the fact that the air outlet pipe is close to the feed inlet section, and the air temperature of the air outlet pipe 22 is changed according to various factors such as the machine speed, the height of the material layer, the air permeability of the material column and the like due to the fact that the air temperature is far away from the feed inlet section, and the air temperature is possibly high or low. If the thermocouple detects that the air temperature of the air outlet pipe 22 is high enough, the system automatically opens the second regulating valve (butterfly valve) 30, closes the first regulating valve (butterfly valve) 29, and combines the air flows of the two air outlet pipes to enter the waste heat boiler 28. If the air temperature of the air outlet pipe 22 is insufficient as measured by the thermocouple, if the air temperature is combined with the high-temperature section air flow and affects the heat efficiency of the waste heat boiler, the system automatically closes the second regulating valve 30, and simultaneously opens the first regulating valve 29, the air flow in the air outlet pipe 22 directly enters the air inlet of the blower through the bypass and is blended into the loop to serve as cooling air of the next circulation.

The scraper device (L) is arranged on the inner side of a (ring) of the discharging area of the (annular) groove cooling machine and the outer side of the (ring), and is wrapped in the inner annular closed air inlet chamber 11' and the outer annular closed air inlet chamber 11 by a sealing cover. The extending depth of the inner and outer scrapers in the cross section direction is not more than the inner wall surface of the inner annular wall or the inner wall surface of the outer annular wall of the groove cooling machine, and one or more scrapers can be arranged along the annular direction according to the material flow condition. Alternatively, the blades of the inner and outer blade apparatuses (L) extend into the bottom annular inner and outer discharge openings of the tank, respectively. The device adopts a plurality of bottom or lower air inlet beams (K) to uniformly introduce wind into the bottom of the material layer. The bottom or lower air inlet beams are arranged at intervals in a certain horizontal direction. For example at intervals of about 20-200cm, such as 50-150 cm.

In this application, "optionally" means either with or without. "optional" means with or without.

In this application, "annular" generally refers to a complete revolution along the tray or along the disc-type forced air cooling device (1), unless otherwise indicated.

In this application "inner ring" or "outer ring" is relative to the housing of a trough-type liquid-tight blast cooling device for sinter use.

Advantages or advantageous technical effects of the invention

1. Compared with the prior art, the scheme of the invention has the following advantages:

1) The overall height requirement of the device is not high: the material seal is arranged at the material outlet and is designed in a buried mode, and the bypass pressure relief device is arranged in the annular closed air chamber, so that the integral height of the groove cooler is not greatly influenced, the integral elevation of the sintering machine is not caused, and the integral downward excavation of a civil engineering foundation of the groove cooler is not caused;

2) Closed circulation of wind flow: because the air flow is in closed cycle, the air from the waste heat boiler is not directly discharged, but is recycled as cooling air after being secondarily dedusted by the bag-type dust remover, so that sensible heat of the air is completely recycled, and particulate matters are not discharged to the atmosphere, thereby greatly helping to improve the environmental index beside the machine;

3) The sintering yield is high: because of the blast cooling adopted by the invention, the extrusion friction problem between the upper material seal and the cooling material surface in the prior art does not exist, so the yield of the sintering machine can be greatly improved;

4) Can reduce environmental pollution: because the invention is provided with a circle of sealing cover on the outer ring. Therefore, when the sinter is scraped by the scraper device L or the blower is in fault maintenance, the atmosphere surrounding the groove cooler is not influenced by fine particles in the disc cooler, and the method has positive significance for improving environmental protection indexes;

5) The thermal efficiency of the waste heat boiler can be maintained in a higher range: because the multi-element wind taking device is adopted, the system can freely adjust the wind quantity entering the waste heat boiler according to the wind temperature detected in real time, so that the wind temperature of the inlet boiler can be maintained in a higher value range, and the heat efficiency of the waste heat boiler can be ensured not to be too low.

In summary, the novel system and the method effectively make up for a plurality of defects existing in the prior art, are more energy-saving, safer, more reliable and more practical than the prior art, and can be expected to have good market prospect in the future.

Drawings

Fig. 1 is a schematic cross-sectional view of a split double-drive and double-sided discharge tank-type liquid-tight forced air cooling apparatus (1) (i.e., a tank chiller) of the present invention.

Fig. 2 is a schematic plan view of a tank-type liquid-tight blast cooling apparatus (1) (i.e., a tank cooler) of the present invention.

Fig. 3 is a schematic cross-sectional view of another trough type liquid seal blast cooling device (1) (i.e. trough chiller) of the present invention wherein the doctor blade does not extend into the box.

Fig. 4A and 4B are schematic views of the first wheel-rail driving apparatus 5 and the second wheel-rail driving apparatus 6, respectively.

Fig. 5 is a schematic partial structure of the upper liquid seal 14.

Fig. 6 is a schematic diagram of the bypass cross wind pressure relief device 12 and its operating state.

FIG. 7 is a schematic cross-sectional view of bypass cross-wind pressure relief device 12 walking to two positions A-A and B-B, respectively.

Fig. 8 is a schematic cross-sectional view of the intake beam K or N.

Fig. 9 is a schematic view of a doctor apparatus.

Reference numerals

1: a tank-type liquid-tight blast cooling device (i.e., tank chiller); 1a: a discharging section; 2: the inner annular wall of the annular groove-shaped stacking box body of the groove-type liquid seal blast cooling device; 3: an outer annular wall of the case; 4: a tray; 5: a first wheel track drive; 501: (support or drive) rollers; 502: a guide rail; 503: a motor; 504: a coupling; 505: a speed reducer; 506: a rotating shaft; 507: a support; 6: a second wheel track drive; 601: (support or drive) rollers; 602: a guide rail; 603: a motor; 604: a coupling; 605: a speed reducer; 606: a rotating shaft; 607: a support; 7: a feed chute; 8: a hood; 9: a blower; 10: an air inlet pipe; 11: an annular airtight air inlet chamber; 11a: a sealing cover; 12: bypass air-blowing pressure relief device; 1201: a bypass air duct; 1202: a rotating shaft; 1203: a wind shielding plate; 1204: a roller; 1205: a special-shaped track; 13: limiting catch wheels; 14: a liquid sealing device; 15: a blanking chute; 16: an electric vibration feeder; 17: discharging a dust hood; 18: a gravity dust removal device; 19: a waste heat boiler; 20: a bag-type dust collector; 21. 22: a first and a second air outlet pipes; 23: an economizer; 24: a bracket or strut; 25: a top cover of the groove cooling machine; 26: a roller for installing the top cover; 27: a foundation; 28: an air duct; 29: a first valve or regulating valve (butterfly valve); 30: a second valve or regulating valve (butterfly valve); 31: and a duct directly to the air inlet of the blower. M: iron ore material; k: lower air inlet equipment (such as an air inlet beam); l: doctor blade apparatus or devices; l01: a scraper; l02: a scraper base; n: upper air inlet equipment (such as an air inlet beam); n1: side (inclined) through holes; n2: bottom (downward) through hole. R: radius of gyration of the box.

Detailed Description

As shown in fig. 1-9, a trough-type liquid-tight blast cooling device 1 for sintering (split double-drive and double-side discharge) is provided, comprising:

1) Sinter from the sintering machine is caused to accumulate from above while annular and peripheral annular discharge openings (i.e., annular inside discharge opening and annular outside discharge opening (P), or simply: (annular) discharge openings on the inner and outer sides, or simply: the inner and outer side discharge openings for short), wherein the box body comprises an inner annular wall 2, an outer annular wall 3 and a whole circle of annular tray 4 at the bottom;

2) A first wheel-rail driving device 5 and a second wheel-rail driving device 6 for driving the ring-shaped accumulation box body to do rotary motion (or complete ring motion) in the horizontal direction;

3) An annular hood (or called a hood) 8 provided on the annular stacker to cover an upper portion of the stacker;

4) At least one air outlet duct (preferably at least two air outlet ducts, for example 1-10, such as 2-6 or 2-4) connected to the top of the hood 8; preferably, at least two air outlet pipes are connected to the top of the hood 8, wherein the at least two air outlet pipes include a first air outlet pipe 21 near the box discharging section 1a and a second air outlet pipe 22 far from the box discharging section 1 a;

5) By adding an inner peripheral seal cover 11a 'and an outer peripheral seal cover 11a along the inner periphery and the outer periphery of the box at the lower portion of the tank type liquid seal blast cooling device 1, inner and outer two rings of closed annular air intake chambers 11' and 11 (or: an inner inlet chamber 11' and an outer inlet chamber 11),

6) Liquid sealing devices 14 are arranged at the upper and lower parts (such as at the bottom of the tray 4) of the air inlet chambers at the inner side and the outer side respectively, so that the liquid sealing devices 14 form a sealing effect with the inner ring box body wall 2 and the outer ring box body wall 3 of the rotary ring-shaped stacking box body;

7) The air outlets of the plurality of blowers 9 are respectively communicated with the outer sealed annular air inlet chamber 11 and/or the inner sealed annular air inlet chamber 11' through corresponding air inlet pipes 10 (air inlet relative to the sealed annular air inlet chamber 11); and

8) Doctor apparatus L mounted on the (ring) inner side and the (ring) outer side of the discharge section 1a of the (ring or full ring) cooling device 1, the latter being enclosed by inner and outer side seal covers 11a 'and 11a respectively in an inner annular closed air inlet chamber 11' and an outer annular closed air inlet chamber 11,

9) Optionally or optionally, a plurality of lower air inlet means K located within the lower space of the housing but above the doctor blades of the doctor blade means L; preferably, the air inlet equipment K at the lower part is an air inlet beam (K), a shutter (K) or an air inlet pipe (K);

Wherein: the blades of the inner and outer blade devices L do not extend into the bottom (full circle) annular inner and outer (i.e., inner and outer both sides) discharge openings (P) of the case, that is, the extending depths of the blades of the inner and outer blade devices L in the cross-sectional direction of the case are respectively standardized not to exceed the inner wall surface of the inner annular wall 2 or the inner wall surface of the outer annular wall 3 of the cooling device 1, or the blades of the inner and outer blade devices L extend into the bottom (full circle) annular inner and outer discharge openings (P) of the case, preferably, the ends of the inner and outer both side blades are respectively close to the outer annular wall 3 or the inner annular wall 2.

Typically, a first wheel-rail drive is used to drive the bottom tray 4. The second wheel-rail drive is used for driving the inner annular wall 2 and the outer annular wall 3 of the box body. The box body and the tray are driven respectively by adopting a split double-driving mode. Preferably, the inner annular wall 2, the outer annular wall 3 and the bottom whole circle annular tray 4 are not required to be connected by a plurality of T-shaped brackets in the box body. Of course, the three can also be connected by a plurality of T-shaped brackets in the box body.

The two ends of the lower air inlet device K are respectively arranged or fixed on the inner annular wall 2 and the outer annular wall 3. The air inlet opening end of the air inlet device K (such as an air inlet beam, a shutter or an air inlet pipe) is communicated with the outer annular closed air inlet chamber 11 and/or the inner annular closed air inlet chamber 11'.

In the device of the application, air is fed into the bottom space (namely bottom material) of the box body from the annular air inlet chamber 11 in two ways, wherein one way is through the annular discharge openings of the inner periphery and the outer periphery (or the inner ring and the outer ring of the annular box body) of the bottom of the annular box body (or the whole circle of the annular box body), and the other way is through a plurality of lower air inlet beams (K).

The bottom or lower air inlet beams are arranged at intervals in a certain horizontal direction. For example at intervals of about 20-200cm, such as 50-150 cm.

Preferably, a first wheel-rail drive 5 (or system) is provided at the bottom of the pallet 4. The first wheel-rail driving apparatus 5 includes: a (supporting or driving) roller 501, at least two or at least one pair of (annular or full-circle annular) guides 502 mounted on the bottom of the pallet 4, a motor 503, a coupling 504, a reducer 505, a rotating shaft 506, a support 507.

Preferably, the second wheel-rail drive 6 is arranged on the side of the housing. More preferably, the second wheel-rail driving apparatus 6 includes: the rollers 601 serving as a support and/or drive function are at least two or at least one pair of guide rails 602, a motor 603, a coupling 604, a decelerator 605, a rotation shaft 606, and a support 607, which are respectively installed inside and outside (i.e., the sides of the inner and outer annular walls 2 and 3) of the (annular or full-circle annular) case body and supported and/or driven by the rollers 601.

In general, a plurality of brackets or posts 24 are provided on the (ring) inner side and the (ring) outer side of a ring-shaped stacker (or referred to as a ring-shaped or full-ring-shaped stacker), respectively. The rails 602 are mounted inside and outside the rings (i.e., the sides of the inner and outer annular walls 2 and 3) of the case (annular or full-circle annular). While the roller 601 or drive roller 601 is mounted on the bracket or stand 24. Correspondingly, for the bracket or column 24 to which the driving roller 601 is mounted, the motor 603, the coupling 604, the decelerator 605, the rotation shaft 606 and the support 607, which are matched with the driving roller 601, are also mounted on the side bracket of the bracket or column 24.

In the discharge section 1a of the cooling device 1, a feed chute 7 is installed above the ring-groove-shaped accumulation box. Downstream of the feed chute 7 there is a material scraping blade.

Preferably, the first air outlet duct 21 communicates to the waste heat boiler 19 of the power plant, while the first air outlet duct 22 communicates in a switchable manner via a duct 28 to the waste heat boiler 19 of the power plant or directly to the air inlet of the blower 9 via a bypass 31. More preferably; a gravity dust removal device 18 is arranged upstream of the gas circuit of the waste heat boiler 19, i.e. the first air outlet duct 21 and/or the second air outlet duct 22 communicates via the gravity dust removal device 18 to the waste heat boiler 19 of the power generation device. Preferably; a bag-type dust collector 20 and an optional coal economizer 23 are arranged in sequence downstream of the gas circuit of the waste heat boiler 19. The air outlet of the bag-type dust collector 20 or the economizer 23 is communicated with the air inlet of each blower 9. Thus, the closed circulation of wind current is realized. Because the invention adopts the closed blowing process, the closed circulation of the wind current can be realized. The technology is characterized in that a bag-type dust collector 20 and an economizer 23 (which can be opened or closed according to the situation) are additionally arranged at the rear part of the original working procedure, and air after the waste heat boiler is subjected to fine particle dust removal is recycled and reused and blown into the annular air inlet chamber 11 to serve as cooling air. The whole process is realized without sensible heat waste and particulate matter atmosphere discharge.

Preferably, the scraper device L is arranged upstream of the discharge section 1a and one or more scraper devices L are each independently mounted on the inside and outside of the discharge section 1a, while the feed chute 7 is located downstream of the discharge section 1 a. Thus, iron ore material is added to the recessed or settled portion after discharging. And then the material is scraped by a material scraping sheet.

Preferably, a buried seal is employed. Because the invention changes the air draft into the air blast, the main position for preventing the air from flowing is changed from the upper part of the material layer to the lower part of the material layer. A discharge chute 15 and an electric vibration feeder 16 are provided at the discharge openings at both the inner and outer sides of the discharge section 1a, respectively, and the discharge chute 15 is preferably buried entirely in the ground.

Preferably, a plurality of pressure relief and ventilation devices 12, such as bypass air blow-off pressure relief devices 12, are arranged outside the outer annular wall 3; and optionally, a plurality of pressure relief vents 12, preferably a plurality of bypass, cross-ventilation vents 12, are provided on the exterior of the inner annular wall (i.e., the inner side of the annular housing). One end (such as the lower end) of a pressure relief and ventilation device 12 (such as a bypass air-flowing pressure relief device 12) of the outer annular wall 2 is communicated with the closed annular air inlet chamber 11, and the other end (such as the upper end) is communicated with the external environment of the box body (namely, the external atmosphere environment of the box body) or is communicated with air inlet equipment N (such as equipment such as an air inlet beam N, a shutter N or an air inlet pipe N) positioned in the upper space of the box body; and optionally, a pressure relief and ventilation device 12 (preferably, a bypass cross-ventilation pressure relief device 12) of the inner annular wall 2 is connected at one end to the inner closed annular air inlet chamber 11', and at the other end to the outside environment of the tank or to an air inlet device (N) located within the upper space of the tank. Preferably, a plurality of (upper) air intake devices N (e.g., upper air intake beams, louvers, air intake pipes, etc.) such as a plurality of upper air intake beams N, which communicate with the upper ends of the plurality of pressure relief and ventilation devices 12 (e.g., bypass air flow relief devices 12), are provided in the upper space of the casing. Preferably, the bypass air-blow-out pressure relief device 12 of the outer annular wall 3 or the bypass air-blow-out pressure relief device 12 of the inner annular wall 2 comprises a bypass air duct 1201, a rotary shaft 1202, an air shielding plate 1203, rollers 1204 and a track 1205 (referred to as a profiled track) which is horizontally annular but has a downward concave deformation in the discharge section 1 a. Preferably, the upper air intake beam N or the air intake duct N has a cross section of a circle, an ellipse, a ring or a polygon (e.g., a triangle or a quadrangle or a pentagon). Preferably, a side (inclined) through hole (N1) is opened on two or more sides of the upper air intake beam N or the air intake duct N and a downward through hole (N2) is opened on the bottom side. That is, the side through hole N1 is inclined downward, and the through hole N2 is inclined downward.

Preferably, both ends of the air inlet device (N) arranged in the upper space of the box body are respectively arranged or fixed on the inner annular wall (2) and the outer annular wall (3). In general, the air inlet device (N) can be arranged horizontally or obliquely.

In a normal state, the roller 1204 is running horizontally, and air tightly combined between the air shielding plate 1203 and the bypass air duct 1201 cannot enter. When passing through the unloading area, due to the downward concave influence of the special-shaped track 1205, the roller 1204 walks downwards and pulls the air shielding plate 1203, so that one end of the air shielding plate 1203 rotates around the rotation shaft 1202 to be separated from the bypass air pipe 1201, namely, the air in the annular air inlet chamber 11 is in an open state, and at the moment, the air in the annular air inlet chamber 11 can enter the bypass air pipe 1201 to enter the air inlet beam N positioned at the upper part of the tank cooler material column. The advantage of doing so is that the pressure relief is formed in the unloading area, so that the air pressure in the area is not as great as that in other areas, thereby reducing the possibility of air passing through the outer strings of the buried seal, and providing assistance in reducing the height of the buried seal from the viewpoint of changing.

Preferably, a plurality of brackets or struts 24 are respectively erected on both sides of the annular-shaped accumulation box of the cooling device 1. On both sides of the upper part of the ring-groove-shaped stacking box body of the cooling device 1, limit baffle wheels 13 are arranged. Wherein the limit stop wheel 13 is fixed to a bracket or strut 24.

The device 1 further comprises: 9) A tank cooler top cover 25 mounted on the top of the tank cooler 1. When the tank cooler is installed, the tank cooler is firstly hoisted to a certain position through a hoisting opening, then is moved to a production appointed position by virtue of the top cover installation roller 26, and the top cover 25 of the tank cooler is not moved after the tank cooler is put into production (namely, the tank body is in rotary motion). The slot cold machine roof 25 is supported by roof mounting rollers 26 mounted on brackets or struts 24.

The application also provides a sinter cooling method using the groove-type liquid seal blast cooling device 1, which comprises the following steps: 1) the cooling device 1 is driven by the first wheel-rail drive 5 and the second wheel-rail drive 6 to perform (full circle) revolution, 2) iron ore material M is scraped off in the discharge section 1a from the discharge opening (P) inside the bottom (ring) and outside the (ring) of the box of the cooling device 1 (ring-shaped or full circle) by means of the inner and outer scraper devices L for discharging (e.g. into the discharge chute 15), 3) sinter from the sintering machine is added from the feed chute 7 into the annular trough-shaped accumulation box (preferably after which the material is scraped off with a material scraper), 4) hot air discharged from at least one air outlet duct (preferably at least two air outlet ducts) (21 and/or 22) connected to the top of the hood 8 is conveyed via duct 28 to the waste heat boiler 19 of the power plant.

Preferably, step 4) comprises the sub-steps of: 4.1 Hot air G1 discharged from the first air outlet duct 21 is delivered to the waste heat boiler 19,4.2 of the power generation apparatus via the duct 28) hot air G2 of a lower temperature discharged from the second air outlet duct 22, delivered to the waste heat boiler 19 of the power generation apparatus via the duct 28 when the temperature of G2 is sufficiently high (i.e., sufficient for the waste heat boiler of the power generation apparatus), or delivered to the air intake of the blower 9 via the bypass 31 when the temperature of G2 is low.

In the above-described method, it is preferable that the hot air G1 and/or G2 is transported to the waste heat boiler 19 of the power generation apparatus after dust is removed via the gravity dust removing apparatus 18, respectively.

Preferably, the low-temperature wind G3 discharged from the waste heat boiler 19 is further removed of dust through the bag-type dust collector 20 and then is sent to the air inlet of each blower 9 after further waste heat utilization through the economizer 23 or without through the economizer 23. Thus, the closed circulation of wind current is realized. Because the invention adopts the closed blowing process, the closed circulation of the wind current can be realized. The technology is characterized in that a bag-type dust collector 20 and an economizer 23 (which can be opened or closed according to the situation) are additionally arranged at the rear part of the original working procedure, and air after the waste heat boiler is subjected to fine particle dust removal is recycled and reused and blown into the annular air inlet chamber 11 to serve as cooling air. The whole process is realized without sensible heat waste and particulate matter atmosphere discharge.

In operation, the tank is turned around the turning circumference (or turning perimeter) of the slot cold machine 1, as shown in fig. 2. The perimeter of revolution (2 pi R) of the tank is generally 60-350 meters, preferably 70-320 meters, preferably 90-280 meters, more preferably 120-250 meters, such as 150-200 meters.

The height of the box of the trough-type liquid-tight blast cooling device for the sintering is 1.5-7.0 meters, preferably 2.5-6.5 meters, preferably 3.5-6 meters, more preferably 4-5.5 meters, more preferably 4.5-5.0 meters.

Compared with the traditional ring cooler technology and the disk cooler technology, the method mainly has the following five changes:

A1. novel closed air blast is adopted to replace the prior air draft: the invention cancels the air draft process, adopts the annular closed air chamber blast air inlet process instead, and forms an inner annular air inlet chamber 11' and an outer annular air inlet chamber 11' by additionally arranging an inner peripheral sealing cover 11a ' and an outer peripheral sealing cover 11a on the outer ring of the sintered material accumulation, and the upper part and the lower part of the air inlet chamber are respectively provided with a liquid sealing device 14, so that a sealing effect is formed between the air inlet chamber and the inner annular wall 2 and the outer annular wall 3 of the rotating tank cooler. Air is blown out from the blower 9, passes through the air inlet pipe 10 and enters the closed annular air inlet chamber 11 and/or the air inlet chamber 11'. Because both the upper part and the lower part are sealed, air can only enter the bottom of the material layer from the bottom or lower material discharging opening of the box body and the air inlet beam (K) at the lower part or the bottom, and finally passes upwards in the material layer to be blown out from the material surface.

A3. Bypass air-blowing pressure relief devices 12 are additionally arranged on the inner side and the outer side of the box body: in order to further reduce the height of the buried material seal, the construction and installation cost is reduced. The invention adds a bypass air-flowing pressure relief device 12 on the groove cooler. The device 12 consists of a bypass air pipe 1201, a rotating shaft 1202, an air shielding plate 1203, rollers 1204 and a special-shaped track 1205. In a normal state, the roller 1204 is running horizontally, and air tightly combined between the air shielding plate 1203 and the bypass air duct 1201 cannot enter. When passing through the unloading area, due to the influence of the downward depression of the special-shaped track 1205 in the unloading section, the roller 1204 walks downwards and pulls the air shielding plate 1203, so that one end of the air shielding plate 1203 rotates around the rotation shaft 1202 as the center of a circle to be separated from the bypass air pipe 1201, and at the moment, the air in the annular air inlet chamber 11 or 11' can enter the bypass air pipe 1201 to enter the air inlet beam N at the upper part of the tank cooler material column. The advantage of doing so is that the pressure relief is formed in the unloading area, so that the air pressure in the area is not as great as that in other areas, thereby reducing the possibility of air passing through the outer strings of the buried seal, and providing assistance in reducing the height of the buried seal from the viewpoint of changing.

A5. The multi-element wind taking device is additionally arranged: the invention is improved on the basis of the original air outlet device, and the multi-element air taking device is arranged, so that a user can freely adjust the air quantity entering the waste heat boiler according to the air temperatures of different sections of air outlets caused by different sinter characteristics, thereby ensuring that the thermal efficiency of the boiler is maintained in a higher range. As shown in fig. 3, the invention sets an air outlet at two positions of the slot cooler, which are close to the feed inlet section and far from the feed inlet section, respectively, a first air outlet pipe 21 and a second air outlet pipe 22. The air temperature of the first air outlet pipe 21 is guaranteed due to the proximity of the feed inlet section, while the air temperature of the second air outlet pipe 22 is changed according to various factors such as the machine speed, the height of the material layer, the air permeability of the material column, and the like, and may be high or low due to the proximity of the feed inlet section. If the thermocouple detects that the air temperature of the second air outlet pipe 22 is high enough, the system automatically opens a second regulating valve (butterfly valve) 30, closes a first regulating valve (butterfly valve) 29, and combines the air flows of the two air outlet pipes to enter the waste heat boiler 28. If the air temperature of the air outlet pipe 22 is insufficient as measured by the thermocouple, if the air temperature is combined with the high-temperature section air flow and affects the heat efficiency of the waste heat boiler, the system automatically closes the second regulating valve 30, and simultaneously opens the first regulating valve 29, the air flow in the air outlet pipe 22 directly enters the air inlet of the blower through the bypass and is blended into the loop to serve as cooling air of the next circulation.

The scraper devices L on the inner side and the outer side are arranged on the inner side of a (ring) and the outer side of a (ring) of a discharging area of the (ring) groove cooling machine, and are wrapped in the inner annular closed air inlet chamber 11' and the outer annular closed air inlet chamber 11 by sealing covers. The penetration depth of the inner side and the outer side scrapers in the cross section direction is respectively standard not to exceed the inner wall surface of the inner annular wall 2 or the inner wall surface of the outer annular wall 3 of the groove cooling machine, and one or more scrapers can be arranged along the annular direction according to the material flow condition. Alternatively, the blades of the inner and outer blade apparatuses (L) extend into the bottom annular inner and outer discharge openings of the tank, respectively. The device adopts a plurality of bottom or lower air inlet beams (K) to uniformly introduce wind into the bottom of the material layer.

In general, the rotation speed of the case is 1.2-2m/s, for example, 1.5m/s, and the temperature of the hot air G1 discharged from the high temperature section is 400-500 c, and the temperature of the hot air G2 from the low temperature section is 250-350 c, for example, 300 c. The length of the discharge section 1a is, for example, 8-14m, such as 10m.

Claims

1. The groove type liquid seal blast cooling device (1) for the sintering ore is characterized in that: the device comprises:

1) a ring-groove-shaped stacking box for stacking sinter from a sintering machine from above and discharging the sinter from lower inner peripheral ring-shaped and outer peripheral ring-shaped discharge openings, wherein the box comprises an inner ring wall (2), an outer ring wall (3) and a tray (4) at the bottom;

2) A first wheel-rail driving device (5) and a second wheel-rail driving device (6) for driving the ring-groove-shaped stacking box body to rotate in the horizontal direction;

3) An annular hood (8) provided on the annular stacking box and covering the upper part of the stacking box;

4) At least one air outlet pipeline connected with the top of the hood (8);

5) An inner closed annular air inlet chamber (11 ') and an outer closed annular air inlet chamber (11) which are respectively formed by stacking an inner ring and an outer ring on a sintering material are formed by additionally arranging an inner peripheral sealing cover (11 a') and an outer peripheral sealing cover (11 a) along the inner periphery and the outer periphery of a box body at the lower part of the groove-type liquid seal blast cooling device (1),

6) The upper and lower parts of the inner closed annular air inlet chamber (11') and the outer closed annular air inlet chamber (11) are respectively provided with a liquid sealing device (14), so that the liquid sealing device (14) forms a sealing effect with the inner annular wall (2) and the outer annular wall (3) of the rotary annular stacking box body;

7) The air outlets of the blowers (9) are respectively communicated with the outer sealed annular air inlet chamber (11) and/or the inner sealed annular air inlet chamber (11') through corresponding air inlet pipes (10); and

8) Doctor apparatus (L) mounted on the inside and outside of the discharge section (1 a) of the cooling device (1), the latter being enclosed by an inner peripheral closure cap (11 a ') and an outer peripheral closure cap (11 a) within the inner closed annular air inlet chamber (11') and the outer closed annular air inlet chamber (11),

9) Optionally or optionally, a plurality of lower air inlet means (K) located within the lower space of the box but above the doctor blades of the doctor blade means (L);

wherein: the scrapers of the inner side and outer side scraper devices (L) do not extend into the bottom annular inner side and outer side discharge openings of the box body, namely, the extending depth of the scrapers of the inner side and outer side scraper devices (L) in the cross section direction of the box body is respectively in the standard of not exceeding the inner wall surface of the inner annular wall (2) or the inner wall surface of the outer annular wall (3) of the cooling device (1), or the scrapers of the inner side and outer side scraper devices (L) extend into the bottom annular inner side and outer side discharge openings of the box body respectively;

wherein a plurality of bypass air-blowing pressure relief devices (12) are arranged outside the outer annular wall (3); and optionally, a plurality of bypass air-flowing pressure relief devices (12) are arranged outside the inner annular wall (2); the bypass air-flowing pressure relief device (12) of the outer annular wall (3) or the bypass air-flowing pressure relief device (12) of the inner annular wall (2) comprises a bypass air pipe (1201), a rotating shaft (1202), an air shielding plate (1203), rollers (1204) and a horizontal annular track (1205) which is deformed in a downward concave manner in the unloading section (1 a).

2. The apparatus according to claim 1, wherein: at least two air outlet pipelines are connected with the top of the hood (8), wherein the at least two air outlet pipelines comprise a first air outlet pipeline (21) close to the box discharging section (1 a) and a second air outlet pipeline (22) far away from the box discharging section (1 a);

The lower air inlet device (K) is an air inlet beam, a shutter or an air inlet pipe.

3. The apparatus according to claim 1 or 2, characterized in that: wherein, the two ends of the lower air inlet device (K) are respectively arranged or fixed on the inner annular wall (2) and the outer annular wall (3), and the air inlet opening end of the lower air inlet device (K) is led to the outer sealed annular air inlet chamber (11) and/or the inner sealed annular air inlet chamber (11'); and/or

The first wheel track driving device (5) is used for driving the tray (4) and the second wheel track driving device (6) is used for driving the inner annular wall (2) and the outer annular wall (3) of the box body.

4. The apparatus according to claim 1 or 2, characterized in that: wherein a first wheel rail driving device (5) is arranged at the bottom of the tray (4); the first wheel-rail driving device (5) comprises: the device comprises rollers (501), at least two or at least one pair of guide rails (502) arranged at the bottom of a tray (4), a motor (503), a coupler (504), a speed reducer (505), a rotating shaft (506) and a support (507); and/or

Wherein the second wheel rail driving device (6) is arranged at the side part of the box body; the second wheel-rail driving device (6) comprises: at least two or at least one pair of guide rails (602) which are respectively installed at the side of the inner annular wall (2) and the side of the outer annular wall (3) of the case and are supported and/or driven by the rollers (601), a motor (603), a coupling (604), a decelerator (605), a rotating shaft (606), and a support (607).

5. A device according to claim 3, characterized in that: wherein a first wheel rail driving device (5) is arranged at the bottom of the tray (4); the wheel rail driving device (5) comprises: the device comprises rollers (501), at least two or at least one pair of guide rails (502) arranged at the bottom of a tray (4), a motor (503), a coupler (504), a speed reducer (505), a rotating shaft (506) and a support (507); and/or

6. The apparatus according to any one of claims 1-2, 5, wherein: wherein a feed chute (7) is arranged above the ring-groove-shaped accumulation box in the discharge section (1 a) of the cooling device (1), and a material scraping sheet is arranged at the downstream of the feed chute (7).

7. A device according to claim 3, characterized in that: wherein a feed chute (7) is arranged above the ring-groove-shaped accumulation box in the discharge section (1 a) of the cooling device (1), and a material scraping sheet is arranged at the downstream of the feed chute (7).

8. The apparatus of any one of claims 1-2, 5, 7, wherein: wherein the first air outlet duct (21) communicates with the waste heat boiler (19) of the power plant, and the second air outlet duct (22) communicates in a switchable manner with the waste heat boiler (19) of the power plant via a duct (28) or directly with the air inlet of the blower (9) via a bypass (31).

9. A device according to claim 3, characterized in that: wherein the first air outlet duct (21) communicates with the waste heat boiler (19) of the power plant, and the second air outlet duct (22) communicates in a switchable manner with the waste heat boiler (19) of the power plant via a duct (28) or directly with the air inlet of the blower (9) via a bypass (31).

10. The apparatus according to claim 8, wherein: a gravity dust removing device (18) is arranged at the upstream of a gas path of the waste heat boiler (19).

11. The apparatus according to claim 9, wherein: a gravity dust removing device (18) is arranged at the upstream of a gas path of the waste heat boiler (19).

12. The apparatus according to claim 10 or 11, characterized in that: a cloth bag dust collector (20) and an optional coal economizer (23) are sequentially arranged at the downstream of a gas path of the waste heat boiler (19); the air outlet of the bag-type dust collector (20) or the economizer (23) is communicated with the air inlet of each blower (9).

13. The apparatus of any one of claims 1-2, 5, 7, 9-11, wherein: wherein the scraper device (L) is arranged upstream of the discharge section (1 a) and is provided with one or more scraper devices (L) independently of each other on the inside and outside of the discharge section (1 a), and the feed chute (7) is located downstream of the discharge section (1 a); and/or

Wherein, the discharging openings at the inner side and the outer side of the discharging section (1 a) are respectively provided with a discharging chute (15) and an electric vibration feeder (16), and the discharging chute (15) is integrally buried in the ground.

14. A device according to claim 3, characterized in that: wherein the scraper device (L) is arranged upstream of the discharge section (1 a) and is provided with one or more scraper devices (L) independently of each other on the inside and outside of the discharge section (1 a), and the feed chute (7) is located downstream of the discharge section (1 a); and/or

15. The apparatus according to claim 1, wherein: one end of a bypass air-flowing pressure relief device (12) of the outer annular wall (3) is communicated with the outer closed annular air inlet chamber (11), and the other end of the bypass air-flowing pressure relief device is communicated with the external environment of the box body or is communicated with upper air inlet equipment (N) positioned in the upper space of the box body; and optionally, one end of a bypass air-flowing pressure relief device (12) of the inner annular wall (2) is communicated with the inner closed annular air inlet chamber (11'), and the other end of the bypass air-flowing pressure relief device is communicated with the external environment of the box body or is communicated with upper air inlet equipment (N) positioned in the upper space of the box body.

16. The apparatus according to claim 15, wherein: the upper air inlet device (N) is an air inlet beam, a shutter or an air inlet pipe.

17. The apparatus according to any one of claims 1, 15-16, wherein: wherein, the lower air inlet device (K) and/or the upper air inlet device (N) has a round, elliptic, annular or polygonal cross section when the upper air inlet device (N) is an air inlet beam or an air inlet pipe; and two or more side edges of the air inlet beam or the air inlet pipe are provided with side through holes (N1) and the bottom side is provided with a downward through hole (N2).

18. A sinter cooling method using the trough-type liquid-tight blast cooling device (1) for sinter use as claimed in any one of claims 1 to 17, characterized in that: the method comprises the following steps: 1) the cooling device (1) is driven by the first wheel rail driving device (5) and the second wheel rail driving device (6) to perform rotary motion, 2) iron ore materials (M) are scraped from discharge openings on the inner side and the outer side of the bottom of a box body of the cooling device (1) in a discharge section (1 a) by means of scraper equipment (L) on the inner side and the outer side for discharging, 3) sinter from a sintering machine is added into a circular groove-shaped stacking box body from a feeding chute (7), and 4) hot air discharged from a first air outlet pipeline (21) and/or a second air outlet pipeline (22) connected with the top of a hood (8) is conveyed to a waste heat boiler (19) of power generation equipment through a pipeline (28).

19. The method according to claim 18, wherein: wherein step 4) comprises the sub-steps of: 4.1 Hot air G1 discharged from the first air outlet duct (21) is conveyed to a waste heat boiler (19) of the power generation equipment via a duct (28), 4.2) lower temperature hot air G2 discharged from the second air outlet duct (22), is conveyed to the waste heat boiler (19) of the power generation equipment via the duct (28) when the lower temperature hot air G2 is sufficiently high in temperature, or is conveyed to an air inlet of the blower (9) via a bypass (31) when the lower temperature hot air G2 is low in temperature.

20. The method according to claim 19, wherein: wherein the hot air G1 and/or the lower temperature hot air G2 are respectively delivered to a waste heat boiler (19) of the power generation device after dust removal by a gravity dust removal device (18).

21. The method according to claim 19 or 20, characterized in that: wherein the low-temperature air G3 discharged from the waste heat boiler (19) is further removed of dust through the bag-type dust collector (20), and then is conveyed to the air inlets of the blowers (9) after further waste heat utilization through the economizer (23) or without passing through the economizer (23).