CN219244131U

CN219244131U - Semi-coke drying system

Info

Publication number: CN219244131U
Application number: CN202320499913.7U
Authority: CN
Inventors: 甘少元; 延贝贝; 米建军; 李冬; 惠晓鹏; 姚小平; 高鹏; 郭鹏
Original assignee: Shaanxi Coal Chemical Group Shenmu Electrochemical Development Co ltd
Current assignee: Shaanxi Coal Chemical Group Shenmu Electrochemical Development Co ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-06-23
Anticipated expiration: 2033-03-15

Abstract

The utility model relates to the technical field of semi-coke drying, in particular to a semi-coke drying system which comprises a rotary kiln, a dust collection box and a fluidized bed furnace, wherein the dust outlet end of the rotary kiln is connected with the dust collection end of the dust collection box, the dust falling end of the dust collection box is connected with the feeding end of the fluidized bed furnace, the air outlet end of the fluidized bed furnace is connected with the air inlet end of the rotary kiln, and the dust collection box is connected with the fluidized bed furnace through a feeding device; according to the utility model, dust generated in the rotary kiln is collected by utilizing the dust collection box, the collected dust is sent into the fluidized bed furnace for combustion, the heated air is sent into the rotary kiln after the air is heated by the combustion of the fluidized bed furnace, so that the drying of the semi-coke is realized, on one hand, the dust generated by the drying of the semi-coke can be collected and utilized, the treatment cost is reduced, and on the other hand, the collected dust is doped and burned, so that the dust is fully utilized, the combustion cost of the original fluidized bed furnace is reduced, and the actual use requirement is met.

Description

Semi-coke drying system

Technical Field

The utility model relates to the technical field of semi-coke drying, in particular to a semi-coke drying system.

Background

The semi-coke is often used in calcium carbide production, and the use requirement of the semi-coke is low in moisture index, so that the fresh semi-coke is often required to be dried for use.

At present, the semi-coke is usually dried by using heated air, then the dried semi-coke is conveyed to the next process, in actual use, as the viscosity of particles on the surface of the semi-coke after drying is reduced to form dust, the semi-coke collides in the drying process to generate new dust, and the dust is discharged into the atmosphere to pollute the environment along with drying gas, even if the dust is collected, the semi-coke can be transported and sold by a vehicle to cause secondary pollution in the transportation process, the resource waste is caused, and the production cost is increased.

Disclosure of Invention

The utility model aims to provide a semi-coke drying system, which solves the problem that the semi-coke cannot be treated with low cost and environmental protection at present.

The technical problem of the utility model is as follows:

the semi-coke drying system is characterized by comprising a rotary kiln, a dust collecting box and a fluidized bed furnace, wherein the dust outlet end of the rotary kiln is connected with the dust collecting end of the dust collecting box, the dust falling end of the dust collecting box is connected with the feeding end of the fluidized bed furnace through a feeding device, and the air outlet end of the fluidized bed furnace is connected with the air inlet end of the rotary kiln.

Further limited, the feeding device comprises a blanking pipe, an air inlet pipe, an air blower and a first control valve arranged on the blanking pipe, one end of the air inlet pipe is connected with the feeding end of the fluidized bed furnace, the other end of the air inlet pipe is connected with the blowing end of the air blower, the dust falling end of the dust collecting box is connected with one end of the blanking pipe, and the other end of the blanking pipe is connected with the air inlet pipe and forms a T-shaped structure with the air inlet pipe.

Further defined, the feeding device further comprises a second control valve, the second control valve is arranged on the air inlet pipe, and the second control valve is positioned between the feeding end of the fluidized bed furnace and the connection position of the air inlet pipe and the blanking pipe.

Further defined, the blower is in communication with a second control valve that is in communication with the first control valve.

Further defined, the air inlet pipe end extends through the furnace wall of the fluidized bed furnace to the interior of the fluidized bed furnace.

Further defined, the semi-coke drying system further comprises a dust removal device, wherein the dust removal device is arranged between the rotary kiln and the dust collection box.

Further limited, a bucket elevator is arranged between the dust removing device and the dust collecting box, and the dust discharging end of the dust removing device is connected with the dust collecting end of the dust collecting box through the bucket elevator.

Further defined, a filter device is arranged at the top of the fluidized bed furnace.

Further defined, the dust removal device is a dust removal cloth bag, the first control valve is a star-shaped discharge valve, and the second control valve is an air source ball valve.

The utility model has the beneficial effects that:

1. according to the utility model, dust generated in the rotary kiln is collected by utilizing the dust collection box, the collected dust is sent into the fluidized bed furnace for combustion, so that waste utilization is realized, fresh air is heated by combustion of the fluidized bed furnace, and then the heated air is sent into the rotary kiln for drying the semi-coke, so that on one hand, the dust generated by drying the semi-coke can be collected and utilized, the treatment cost is reduced, the environmental pollution is reduced, and on the other hand, the collected dust is mixed and burned in the fluidized bed furnace, so that the dust is fully utilized, the combustion cost of the original fluidized bed furnace is also reduced, and the actual use requirement is met.

2. The feeding device is increased to control the amount of dust fed into the fluidized bed furnace, so that the feeding amount can be adjusted according to the heating requirement of the fluidized bed furnace, the air circulation can be increased by increasing the air blower, the dust can be combusted more fully, the combustion efficiency is improved, the dust below the fluidized bed furnace can be blown into the feeding end of the fluidized bed furnace at a higher position according to the requirement, the transformation is simple, the cost is low, the actual use requirement is met, and the dust amount blown into the fluidized bed furnace can be controlled more accurately.

Drawings

FIG. 1 is a schematic diagram of the overall system of the present utility model;

1-a rotary kiln; 2-a dust box; 3-fluidized bed furnace; 4-a dust removal device; 5-bucket elevator; a-blanking pipe; b-an air inlet pipe; c-a blower; d-a first control valve; e-a second control valve.

Detailed Description

Referring to fig. 1, this embodiment provides a semi-coke drying system, including rotary kiln 1, dust collection box 2 and fluidized bed furnace 3, rotary kiln 1 is used for carrying out the stoving with semi-coke and obtains dry semi-coke, afterwards carry the semi-coke after the drying to next process, semi-coke is in rotary kiln 1 screw conveying, let in high temperature air in rotary kiln 1 and realize fully drying to semi-coke, high temperature air gets into from rotary kiln 1's inlet end, last the play dirt end of rotary kiln 1 discharges, contain a large amount of semi-coke dust in the high temperature air of discharge this moment, so need increase dust collector 4 and filter the dust in the air after the heat transfer, the heat transfer air discharge after the filtration, the semi-coke dust that the filtration obtained is collected in dust collection box 2, the one end of dust collection box 2 unloading is the dust fall end, the dust fall end is connected with the feed end of fluidized bed furnace 3, fluidized bed furnace 3 is used for heating air, semi-coke gets into fluidized bed furnace 3 and carries out the burning release heat, the fixed carbon content of semi-coke is high in the calorific value, can satisfy fluidized bed furnace 3 and mix the waste of raw materials after the combustion, realize the waste of raw materials is realized to coal with the fluidized bed furnace 3.

The heated air is discharged into the rotary kiln 1 from the air outlet end of the fluidized bed furnace 3 through the air inlet end of the rotary kiln 1 to heat and dry semi-coke, so that dust can be recovered, environmental pollution is avoided, and the dust can be fully utilized to realize the maximum benefit of resources, and the production cost is reduced; the top of the fluidized bed furnace 3 is provided with a filtering device which is used for filtering and discharging the flue gas generated after the coal and the semi-coke ash of the fluidized bed furnace 3 are combusted, thereby protecting the environment.

Specifically, dust collector 4 optional is the dust removal sack, and the dust removal sack filters the heat transfer air behind the fresh semi-coke drying, carries the dust that will filter the acquisition to bucket elevator 5 through scraper conveyor afterwards, later collects the dust of collecting in dust collection box 2 through bucket elevator 5, and promptly rotary kiln 1 loops through dust collector 4, scraper conveyor and bucket elevator 5 and the dust collection end connection of dust collection box 2, realizes the collection of dust, is suitable for present production environment, reforms transform simply with low costs, satisfies the user demand.

Since the dust box 2 is usually used for loading dust conveniently, the dust falling end of the dust box 2 is close to the ground, and the feeding end of the fluidized bed furnace 3 is higher than the dust falling end of the dust box 2, so that in order to reduce the reconstruction cost, the feeding device is increased, the feeding device comprises a blanking pipe a, an air inlet pipe b, a blower c, a first control valve d and a second control valve e, one end of the blanking pipe a is connected with the dust falling end of the dust box 2, and in order to control the blanking amount, the first control valve d is arranged on the blanking pipe a and used for controlling the blanking amount, the other end of the blanking pipe a is connected with the air inlet pipe b to form a T-shaped structure, namely the blanking pipe a is connected on the periphery of the air inlet pipe b, and blue carbon ash enters the air inlet pipe b through the blanking pipe a; one end of an air inlet pipe b is connected with an air blower c, the air blower c is used for blowing air into the air inlet pipe b, the other end of the air inlet pipe b penetrates through the furnace wall of the fluidized bed furnace 3 and extends to the inside of the fluidized bed furnace 3 to be connected with the feeding end of the fluidized bed furnace 3, dust falls into the air inlet pipe b along a blanking pipe a after the air blower c and a first control valve d are sequentially opened, dust in the air inlet pipe b is blown into the fluidized bed furnace 3 under the action of the air blower c, dust in a lower position can be blown into the fluidized bed furnace 3 at a higher position, meanwhile, the dust blown into the fluidized bed furnace 3 is combusted more fully through the air blower c, the combustion efficiency is high, the coal consumption is saved, and the semi-coke drying cost is further reduced.

In actual production, an operator is often required to control dust entering the fluidized bed furnace 3, so that the phenomenon that the air blower c is started when the first control valve d is closed to reduce the fuel of the fluidized bed furnace 3 to reduce the temperature is avoided, and the second control valve e is connected to the air inlet pipe b to conveniently control whether the dust enters the fluidized bed furnace 3; in actual production, a plurality of fluidized bed furnaces are needed to supply heat to a plurality of rotary kilns 1, all dust can be uniformly collected in a dust collection box 2, at the moment, an air inlet pipe b comprises a first air pipe and a plurality of second air pipes, the second air pipes are connected with the fluidized bed furnaces in a one-to-one correspondence manner, all the second air pipes are arranged side by side and are connected with the first air pipes, the first air pipes are connected with a blower c and a blanking pipe a, and meanwhile, a plurality of second control valves e are also connected to the second air pipes in a one-to-one correspondence manner, so that each second control valve e can independently control dust entering the corresponding fluidized bed furnace 3 to start and stop, and the actual use requirements are met.

In actual use, in order to avoid dust accumulation blocking the air inlet pipe b caused by the fact that the air blower c is not opened after the first control valve d is opened, the air blower c is in communication connection with the second control valve e, the second control valve e is in communication connection with the first control valve d, the air blower c is started firstly during operation, then the second control valve e is opened after a period of time delay, and finally the first control valve d is opened again after the second control valve e is started for a period of time, so that the starting of material conveying is completed; when the material conveying machine is stopped, the first control valve d is required to be closed, the second control valve e is closed, and finally the blower c is closed, so that the effective performance of semi-coke drying and material conveying is ensured.

Wherein, the first control valve d can be selected as a star-shaped discharge valve, the second control valve e can be selected as a ball valve, for example, an air source ball valve, and the blower c can be selected as a Roots blower.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions.

Claims

1. The semi-coke drying system is characterized by comprising a rotary kiln (1), a dust collection box (2) and a fluidized bed furnace (3), wherein the dust outlet end of the rotary kiln (1) is connected with the dust collection end of the dust collection box (2), the dust falling end of the dust collection box (2) is connected with the feeding end of the fluidized bed furnace (3) through a feeding device, the air outlet end of the fluidized bed furnace (3) is connected with the air inlet end of the rotary kiln (1), and the dust collection box (2) is connected with the fluidized bed furnace (3).

2. The semi-coke drying system according to claim 1, wherein the feeding device comprises a blanking pipe (a), an air inlet pipe (b), a blower (c) and a first control valve (d) arranged on the blanking pipe (a), one end of the air inlet pipe (b) is connected with the feeding end of the fluidized bed furnace (3), the other end of the air inlet pipe (b) is connected with the blowing end of the blower (c), the dust falling end of the dust collecting box (2) is connected with one end of the blanking pipe (a), and the other end of the blanking pipe (a) is connected with the air inlet pipe (b) and forms a T-shaped structure with the air inlet pipe (b).

3. The semi-coke drying system according to claim 2, wherein the feeding device further comprises a second control valve (e), the second control valve (e) is arranged on the air inlet pipe (b), and the second control valve (e) is arranged between the feeding end of the fluidized bed furnace (3) and the connection position of the air inlet pipe (b) and the blanking pipe (a).

4. A semi-coke drying system according to claim 3, wherein the blower (c) is in communication with a second control valve (e), which is in communication with the first control valve (d).

5. A semi-coke drying system according to claim 3, characterized in that the end of the air inlet pipe (b) extends through the furnace wall of the fluidized bed furnace (3) to the interior of the fluidized bed furnace (3).

6. Semi-coke drying system according to claim 4, characterized in that it further comprises a dust removal device (4), said dust removal device (4) being arranged between the rotary kiln (1) and the dust bin (2).

7. The semi-coke drying system according to claim 6, wherein a bucket elevator (5) is arranged between the dust removing device (4) and the dust collecting box (2), and the dust discharging end of the dust removing device (4) is connected with the dust collecting end of the dust collecting box (2) through the bucket elevator (5).

8. Semi-coke drying system according to claim 7, characterized in that the top of the fluidized bed furnace (3) is provided with a filter device.

9. The semi-coke drying system according to claim 8, wherein the dust removal device (4) is a dust removal cloth bag, the first control valve (d) is a star-shaped discharge valve, and the second control valve (e) is a ball valve.