CN217179228U - Shaft kiln type cooler - Google Patents

Abstract

The embodiment of the utility model provides a shaft kiln type cooler, which comprises a single-roller main funnel, a shaft kiln, a material collecting hopper at the bottom end of a kiln body, a cold air duct at the bottom of the shaft kiln and a medium-temperature regenerative air duct at the middle part of the shaft kiln; the single-roller main hopper is positioned below the star roller and the single roller at the tail of the sintering machine; the top of the aggregate bin is communicated with the kiln cavity; the bottom end of the aggregate bin is provided with a discharge hole; a high-temperature hot air duct is arranged on one side of the top of the shaft kiln; the air outlet of the cold air duct and the air outlet of the medium-temperature hot air duct are respectively communicated with the kiln cavity; and an air inlet of the cold air duct and an air inlet of the medium-temperature hot air duct are respectively connected with an external fan. The technical scheme of the utility model in, the reducible calorific loss of high temperature hot-blast main's design to through setting up the medium temperature and returning hot-blast pipeline, improved the waste heat utilization ratio among the sintering deposit cooling process.

Description

Shaft kiln type cooler

Technical Field

The utility model relates to a steel production technical field especially relates to a shaft kiln formula cooler.

Background

The sinter cooling equipment is one of key equipment for sintering production, and various cooling equipment forms such as a belt cooler, a ring cooler and the like are used at present, wherein the ring cooler is divided into a bent rail discharging type and a trolley bottom plate overturning discharging type according to different equipment structures.

In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art:

the existing sinter cooling equipment, namely a belt cooler or a ring cooler, has the problem of large air leakage, so that the waste of heat energy is caused. Therefore, how to provide a novel cooling machine with high waste heat recovery and utilization rate through the improvement of the structure is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a shaft kiln formula cooler to there is the problem that the air leakage rate is high and waste heat recovery utilization rate is low among the solution prior art in the sinter cooling process.

In order to achieve the above object, an embodiment of the present invention provides a shaft kiln type cooling machine, which includes a single-roller main funnel at the top, a hollow shaft kiln fixedly connected right below the single-roller main funnel, a material collecting hopper fixedly connected to the bottom end of the kiln body, a cold air duct horizontally arranged at the bottom of the shaft kiln, and a medium-temperature back-heating air duct horizontally arranged at the middle part of the shaft kiln; the single-roller main hopper is positioned below the star roller and the single roller at the tail of the sintering machine; the top of the aggregate bin is communicated with the kiln cavity; the bottom end of the aggregate bin is provided with a discharge hole; a high-temperature hot air duct is arranged on one side of the top of the shaft kiln; the air outlet of the cold air duct and the air outlet of the medium-temperature hot air duct are respectively communicated with the kiln cavity; and an air inlet of the cold air duct and an air inlet of the medium-temperature hot air duct are respectively connected with an external fan.

Furthermore, a plurality of cold air channels are uniformly distributed in the front-back direction; the medium-temperature heat return air ducts are provided with a plurality of medium-temperature heat return air ducts which are uniformly distributed in the front-back direction.

Furthermore, three cold air ducts are arranged; there are three middle temperature back heating air ducts.

Furthermore, the air outlet of the cold air duct is provided with a plurality of continuously arranged ventilation grids, and the air outlet of the medium-temperature back hot air duct is provided with a plurality of continuously arranged ventilation grids with openings facing obliquely downwards.

Furthermore, a plurality of collecting hoppers are provided; the collecting hopper is a cone structure with a large upper part and a small lower part.

Furthermore, a vibrator is arranged on the side wall of the aggregate bin.

Further, the discharge hole is provided with a chain plate feeder.

Furthermore, a single-roller auxiliary funnel is arranged on one side of the single-roller main funnel; the single-roller auxiliary funnel is arranged above the side of the top of the shaft kiln; the bottom opening of the single-roller auxiliary funnel is communicated with the kiln cavity.

Further, the shaft kiln is of a cuboid structure; the cross section of the shaft kiln is larger than that of the bottom opening of the hopper.

Furthermore, a high-temperature resistant protective layer is laid on the side wall of the upper part of the shaft kiln.

The technical scheme has the following beneficial effects:

according to the technical scheme of the utility model, when the sintering mineral aggregate in the kiln cavity meets the requirement of material level height, a closed high-temperature hot air duct is formed between the side edge of the stack and the inner side wall of the shaft kiln spontaneously, and hot air in the high-temperature hot air duct is discharged out of the kiln under the driving of an external fan, so that the temperature of the material in the kiln is reduced, and in the process of pumping and discharging high-temperature hot air, the high-temperature hot air hardly overflows from other channels at the top or the bottom due to the negative pressure, so that the air leakage rate of the whole cooler is low, and the heat waste is reduced; meanwhile, a medium-temperature back-heating air duct is arranged in the cooler, high-temperature hot air discharged from the kiln is efficiently recycled, and the problem of low waste heat utilization rate in the prior art is solved.

In addition, the technical scheme of the application also has the following characteristics:

1. the vertical shaft kiln type cooler is compact in structure and small in occupied area, and compared with a traditional cooler, the vertical shaft kiln type cooler greatly reduces construction cost and operation and maintenance cost;

2. the shaft kiln type structural design can effectively avoid the problems of side wall abrasion or kiln wall smashing and wearing and the like, thereby reducing the operation and maintenance cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a front view of a shaft kiln type cooler according to an embodiment of the present invention;

FIG. 2 is a left side view of a shaft kiln type cooler according to an embodiment of the present invention;

reference numerals: 1. a star roller at the tail part of the sintering machine; 2. a single roll; 3. a single-roller main hopper; 4. a single roller pair funnel; 5. a kiln chamber; 6. a high-temperature hot air duct; 7. a medium-temperature heat return air duct; 8. a cooling air duct; 9. a collection hopper; 10. a chain plate feeder; 11. a belt conveyor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a shaft kiln type cooling machine, which includes a single-roller main funnel 3 at the top, a hollow shaft kiln fixedly connected to the bottom of the single-roller main funnel 3, a material collecting hopper 9 fixedly connected to the bottom of the kiln body, a cold air duct 8 horizontally arranged at the bottom of the shaft kiln, and a medium-temperature hot return air duct 7 horizontally arranged at the middle of the shaft kiln; the single-roller main hopper 3 is positioned below the star roller 1 and the single roller 2 at the tail of the sintering machine; the top of the aggregate bin 9 is communicated with the kiln cavity 5; a discharge hole is formed in the bottom end of the aggregate bin 9; a high-temperature hot air duct 6 is arranged on one side of the top of the shaft kiln; the air outlet of the cold air duct 8 and the air outlet of the medium-temperature hot air return duct 7 are respectively communicated with the kiln cavity 5; and the air inlet of the cold air duct 8 and the air inlet of the medium-temperature hot air return duct 7 are respectively connected with an external fan.

The problem that area is big all exists in current belt cooler, ring type cooler etc. for reduce space and occupy, this application designs the form of cooler for the shaft kiln. This shaft kiln cooler top links to each other with the funnel (including single-roll main funnel 3 and single-roll auxiliary funnel 4), and one side on top links to each other with high-temperature hot-blast wind channel 6, and high-temperature hot-blast wind channel 6's the other end links to each other with dust remover, heat exchanger, circulating fan etc. (not shown in the figure) in proper order for the hot-blast outside of arranging that the sintering mineral material produced in the kiln for the sintering mineral material can obtain the cooling. Meanwhile, a cooling pipe is arranged below the high-temperature hot air duct 6 and used for blowing air with lower temperature into a cavity (namely the kiln cavity 5) inside the shaft kiln under the action of an external fan so as to cool the sintered mineral materials close to the bottom of the kiln cavity 5, and meanwhile, the air circulation in the kiln cavity 5 is facilitated, the pressure in the kiln cavity 5 is ensured to be stable within a reasonable range, and the top hot air is ensured to be rapidly discharged from the high-temperature hot air duct 6.

Meanwhile, in order to improve the utilization rate of waste heat, in the application, besides the bottommost cold air duct 8, a middle-temperature hot air return duct 7 is arranged at the middle position of the shaft kiln, hot air discharged from the high-temperature hot air duct 6 can be introduced into the input end (one part is used) of the middle-temperature hot air return duct 7 through an external circulating fan (not shown in the figure) after heat exchange, and the other part of middle-temperature air is sent back to the sintering machine to be used for sintering and heat preservation, so that heat loss is prevented, and the utilization rate of the waste heat of sintering ore is improved. The cold air duct 8 is arranged below the medium-temperature hot air return duct 7, so that the cooling air and the sintering ore automatically realize reverse step heat exchange.

The single-roller main hopper 3, the single-roller auxiliary hopper 4 and the shaft kiln are respectively fixedly supported, and the connection between the single-roller main hopper and the shaft kiln adopts a telescopic flexible expansion joint sealing mode.

During normal production, the lower port of funnel need be full of the material, ensure that funnel lower port material seal is effective, and keep the material height to be located fig. 2 between minimum material level and the highest material level, just so can make kiln 5 in lean on the top both sides to form effectual high temperature hot-blast wind channel 6 (because the bottom of single-roll main funnel 3 is the binding off form, combine the physical properties of sintered mineral material, the sintered mineral material that falls down from top single-roll department can not pile up whole kiln 5, but form the top surface that fig. 2 shows and be conical pinnacle stack, and between the inside wall of stack side and shaft kiln, just spontaneously formed confined cavity, high temperature hot-blast wind channel 6 promptly). The hot air in the high-temperature hot air duct 6 is discharged out of the kiln under the driving of an external fan, so that the temperature of materials in the kiln is reduced, and in the discharging process, the high-temperature hot air hardly overflows from other channels at the top or the bottom, so that the air leakage rate of the whole cooling machine is very low, and the working efficiency is very high.

Furthermore, the number of the cold air ducts 8 is multiple, and the multiple cold air ducts 8 are uniformly distributed in the front-back direction; the medium-temperature hot air return ducts 7 are provided with a plurality of medium-temperature hot air return ducts 7, and the plurality of medium-temperature hot air return ducts 7 are uniformly distributed in the front-rear direction.

In order to send the wind into the shaft kiln by the medium and low temperature wind energy and uniformly diffuse and cool, a plurality of wind channels can be respectively arranged for the medium and low temperature wind. Each air duct is sealed at one end, the other end is connected with a circulating fan or a blower (a cold air duct 8 is connected with an external blower, and a medium-temperature hot air return duct 7 is connected with an external circulating fan), and each air duct is provided with an air outlet communicated with the kiln cavity 5.

Further, three cold air ducts 8 are provided; three medium-temperature hot air return ducts 7 are provided.

As shown in fig. 2, in the present application, preferably, three cool air ducts 8 and three medium temperature return air ducts 7 are disposed in the cooling machine, and the air ducts are disposed at equal intervals on the front and rear side surfaces and the middle portion of the shaft kiln.

Further, the air outlet of the cold air duct 8 is provided with a plurality of continuously arranged ventilation grids, the air outlet of the medium-temperature hot air return duct 7 is provided with a plurality of continuously arranged ventilation grids, and the openings of the ventilation grids face obliquely downward.

In order to prevent the materials from entering the air duct to cause blockage when falling, the air outlet of the air duct can be set into a ventilation grid form, namely, a plurality of continuous and dense ventilation grids which are inclined downwards are arranged on the side surface of the air duct.

Further, the collection hopper 9 is provided with a plurality of hoppers; the aggregate bin 9 is a cone structure with a large upper part and a small lower part.

The collecting hopper 9 is used for collecting and supporting the sintering ore in the kiln, and the collecting hopper 9 is filled with materials to play a role of material sealing during working, so that the cooling air can be prevented from sinking and overflowing from a discharge port of the shaft kiln. In order to be more convenient for control material flow speed, this application has set up many adjustable speed link joint batchers in collecting hopper 9 below. In order to concentrate the discharged materials and reduce the pressure of the chain plate machine, the material collecting hopper 9 should be of a cone structure with a large upper part and a small lower part, such as a cone structure or a square cone structure.

Further, a vibrator is arranged on the side wall of the aggregate bin 9.

A discharge port is formed at the bottom of the aggregate bin 9, in order to prevent unsmooth blanking caused by the binding materials on the side wall of the aggregate bin 9, vibrators can be arranged on all surfaces outside the wall of the aggregate bin 9, and when the binding materials on the wall of the aggregate bin 9 are vibrated down by the vibrators, smooth discharging is ensured.

Further, the discharge port is provided with a chain plate feeder.

A speed-adjustable chain plate feeder 10 is arranged at a discharge outlet at the bottom of the collecting hopper 9. The adjustable speed formula link joint batcher 10 can realize the ration as required and arrange the material, and 5 material flow velocity in effective control kiln chamber and sinter cooling effect can effective control material level in the kiln chamber 5 simultaneously, ensure that the material level length period is stable in suitable height in the kiln chamber 5, prevent that the material level from excessively causing the stone or the material level crosses lowly and causes the top material in kiln chamber 5 to seal the inefficacy. The material discharged by the apron feeder 10 is transported by a belt conveyor 11.

Further, a single-roller auxiliary funnel 4 is arranged on one side of the single-roller main funnel 3; the single-roller auxiliary funnel 4 is arranged above the side of the top of the shaft kiln; the bottom opening of the single-roller auxiliary funnel 4 is communicated with the kiln cavity 5.

The sintered cake output from the tail of the sintering machine enters a kiln cavity 5 after being crushed by a single roller 2, and a single roller auxiliary funnel 4 is arranged on the side of the top of the shaft kiln in addition to a single roller main funnel 3. The single-roller auxiliary hopper 4 is used for receiving a plurality of bulk materials which are rewound by the sintering pallet and fall from the scraper, and storing the materials which can be temporarily slipped from the side plate at the top of the single-roller main hopper 3 into the single-roller auxiliary hopper 4 after the single-roller main hopper 3 is full. After entering the single-roller pair funnel 4, the materials can slide into the kiln cavity 5 along the side wall. The bottom opening position of the single-roller auxiliary funnel 4 can be lower than the bottom opening position of the single-roller main funnel 3 and can also be higher than the outlet of the single-roller main funnel 3, and the bottom opening position of the single-roller auxiliary funnel 4 is determined according to the inclination of the outer side wall plate of the single-roller auxiliary funnel 4, so long as the inclination is enough and the material is not accumulated. The lower part of the single-roller auxiliary funnel 4 is connected with the top of the shaft kiln, and under the condition that the single-roller auxiliary funnel 4 adopts fixed support, the single-roller auxiliary funnel 4 is connected with the shaft kiln by adopting flexible sealing connection of a telescopic expansion joint.

Further, the shaft kiln is of a cuboid structure; the cross section of the shaft kiln is larger than that of the bottom opening of the hopper.

This shaft kiln directly sets up under the single roll, and the shaft kiln design is the cuboid structure, and simultaneously, the shaft kiln is big and wide than the funnel, can directly fall into in single roll main hopper 3 and the shaft kiln under the single roll 2 after the sintering deposit is broken, avoids wearing and tearing funnel wall or kiln wall, avoiding the kiln wall to pound the wearing and tearing because of the flow direction that changes the sintering deposit, and can effectively utilize the space of single roll below, simultaneously, can avoid causing the sintering deposit to be broken once more because of the drop is too big.

Furthermore, a high-temperature resistant protective layer is laid on the side wall of the upper part of the shaft kiln. In order to prevent the kiln body equipment from being damaged by high temperature, a high temperature resistant layer made of refractory material is paved on the side wall of the upper part of the shaft kiln.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A shaft kiln type cooler is characterized by comprising a single-roller main funnel (3) at the top, a hollow shaft kiln fixedly connected right below the single-roller main funnel (3), a material collecting hopper (9) fixedly connected to the bottom end of a kiln body, a cold air duct (8) horizontally arranged at the bottom of the shaft kiln, and a medium-temperature back hot air duct (7) horizontally arranged in the middle of the shaft kiln; the single-roller main hopper (3) is positioned below the star roller (1) at the tail of the sintering machine and the single roller (2); the top of the aggregate bin (9) is communicated with the kiln cavity (5); a discharge hole is formed in the bottom end of the aggregate hopper (9); a high-temperature hot air duct (6) is arranged on one side of the top of the shaft kiln; the air outlet of the cold air duct (8) and the air outlet of the medium-temperature back hot air duct (7) are respectively communicated with the kiln cavity (5); and the air inlet of the cold air duct (8) and the air inlet of the medium-temperature back hot air duct (7) are respectively connected with an external fan.

2. The shaft kiln type cooler according to claim 1, wherein the plurality of cool air ducts (8) are provided, and the plurality of cool air ducts (8) are uniformly distributed in the front-rear direction; the medium-temperature back-heating air ducts (7) are provided with a plurality of medium-temperature back-heating air ducts (7) which are uniformly distributed in the front-back direction.

3. The shaft kiln cooler as defined in claim 2, wherein said cold-air duct (8) has three; three medium-temperature back hot air ducts (7) are provided.

4. The shaft kiln type cooler according to claim 1, wherein the air outlet of the cool air duct (8) is a plurality of continuously arranged air grids, the air outlet of the medium temperature return air duct (7) is a plurality of continuously arranged air grids, and the opening of the air grids faces obliquely downward.

5. Shaft kiln cooler according to claim 1, characterized in that the collection hopper (9) is plural; the aggregate bin (9) is of a cone structure with a large upper part and a small lower part.

6. Shaft kiln cooler according to claim 5, characterized in that the collecting hopper (9) is provided with vibrators on its side walls.

7. Shaft kiln cooler according to claim 1, characterized in that the discharge opening is provided with a apron feeder (10).

8. Shaft kiln cooler according to claim 1, characterized in that a single-roller auxiliary hopper (4) is arranged on one side of the single-roller main hopper (3); the single-roller auxiliary funnel (4) is arranged above the side of the top of the shaft kiln; the bottom opening of the single-roller auxiliary funnel (4) is communicated with the kiln cavity (5).

9. The shaft cooler of claim 1, wherein said shaft is of rectangular parallelepiped configuration; the cross section of the shaft kiln is larger than that of the bottom opening of the hopper.

10. The shaft cooler of claim 1, wherein a high temperature resistant protective layer is laid on a side wall of an upper portion of said shaft.

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