CN213803631U

CN213803631U - Coal pyrolysis wet quenching drying system

Info

Publication number: CN213803631U
Application number: CN202022921945.0U
Authority: CN
Inventors: 宋如昌; 李亚军; 李海鹏; 高宏寅
Original assignee: Shaanxi Dongxinyuan Chemical Co ltd
Current assignee: Shaanxi Dongxinyuan Chemical Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-07-27
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a coal pyrolysis wet quenching drying system, which comprises a quenching slot, a flue gas purification device, a rotary kiln, a combustion device and a discharge bin which are arranged below a coal pyrolysis furnace; a first belt conveying mechanism for conveying wet coke is arranged between a discharge port of the coke quenching tank and a feed port of the rotary kiln, a flue gas purification device is installed at the feed port of the rotary kiln, a combustion device is arranged at the discharge port of the rotary kiln, a second belt conveying mechanism for conveying dried coke is arranged between the discharge port of the rotary kiln and the feed port of the discharge bin, and the height of the feed port of the rotary kiln is higher than that of the discharge port of the rotary kiln. The utility model discloses a set up closed structure's rotary kiln, have the problem that the heat scatters and disappears when can avoiding wet burnt stoving, make the wet burnt after the stoving can reach the technological quality requirement of settlement to can retrieve the flue gas effectively, avoid causing the pollution to the environment.

Description

Coal pyrolysis wet quenching drying system

Technical Field

The utility model belongs to the technical field of the coal pyrolysis, concretely relates to coal pyrolysis wet quenching drying system.

Background

Coal pyrolysis, also known as dry distillation of coal, is a complex process of a series of physical and chemical changes that occur when coal is continuously heated to a higher temperature in the absence of air or an inert atmosphere. As a result, products such as gas (coal gas), liquid (tar), and solid (semicoke or coke) are produced.

At present, an internal combustion internal heating type vertical square pyrolysis furnace is generally adopted during coal pyrolysis, wet quenching is mostly adopted after coal pyrolysis, and then clean coal after pyrolysis is dried through a drying bed, so that moisture meets set process requirements.

In the prior art, most drying beds are arranged in the open air, so the fuel consumption is high, the minimum water content of the dried clean coal can only be controlled to be about 12 percent, the set process requirement is difficult to meet, and meanwhile, smoke generated by the drying beds cannot be recycled, so that serious environmental pollution is caused.

Disclosure of Invention

The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a coal pyrolysis wet process quenching drying system, this system is through the rotary kiln that sets up closed structure, has the problem that the heat scatters and disappears when can avoiding wet burnt stoving, makes the wet burnt after the stoving can reach the technological requirement of settlement to can retrieve the flue gas effectively, avoid causing the pollution to the environment.

In order to solve the technical problem, the utility model discloses a technical scheme is: a coal pyrolysis wet quenching drying system comprises a quenching slot, a flue gas purification device, a rotary kiln, a combustion device and a discharge bin, wherein the quenching slot is arranged below a coal pyrolysis furnace;

the coke quenching device is characterized in that a first belt conveying mechanism used for conveying wet coke is arranged between a discharge port of the coke quenching tank and a feed port of the rotary kiln, the feed port of the rotary kiln is provided with the flue gas purification device, the discharge port of the rotary kiln is provided with the combustion device, a second belt conveying mechanism used for conveying dried coke is arranged between the discharge port of the rotary kiln and the feed port of the discharge bin, and the feed port of the rotary kiln is higher than the discharge port of the rotary kiln.

Preferably, the flue gas purification device includes blast pipe, induced duct and the shower that connects gradually, the blast pipe lower extreme with the rotary kiln intercommunication, be equipped with the draught fan in the induced duct, be equipped with the flue gas in the shower and spray desulfurization mechanism, the shower bottom is equipped with doctor solution recovery unit.

Preferably, the combustion device comprises an air fan and a fuel gas source, an air outlet of the air fan is communicated with the rotary kiln, and the fuel gas source is communicated with the rotary kiln through a ventilation pipeline.

Preferably, the discharge bin is funnel-shaped, and a discharge port of the discharge bin is connected with a feed inlet of the coke drying and screening device.

Compared with the prior art, the utility model has the following advantage:

the utility model can avoid the problem of heat dissipation when the wet coke is dried by arranging the rotary kiln with a closed structure, thereby improving the drying efficiency, saving the fuel consumption, and leading the dried wet coke to reach the set process quality requirement; the rotary kiln with the closed structure can effectively recover the flue gas, and the flue gas is treated and purified by the flue gas purification device after being recovered, so that the environmental pollution can be avoided.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of a coal pyrolysis wet quenching drying system provided by an embodiment of the utility model.

Description of reference numerals:

1-a coal pyrolysis furnace; 2, quenching a coke trough; 3-a first belt transport mechanism;

4, rotating the kiln; 5, discharging a material bin; 6-a second belt transport mechanism;

7-a flue gas purification device; 71-exhaust pipe; 72-induced duct;

73-vertical shower pipes; 74-desulfurization liquid recovery device;

8, a combustion device; 81-air blower; 82-a source of combustion gases;

9-drying coke and removing screening coke device.

Detailed Description

As shown in fig. 1, the coal pyrolysis wet quenching and drying system of the present invention comprises a quenching tank 2, a flue gas purification device 7, a rotary kiln 4, a combustion device 8 and a discharge bin 5, which are arranged below a coal pyrolysis furnace 1;

a first belt conveying mechanism 3 for conveying wet coke is arranged between a discharge hole of the coke quenching tank 2 and a feed hole of the rotary kiln 4, a flue gas purification device 7 is installed at the feed hole of the rotary kiln 4, a combustion device 8 is arranged at the discharge hole of the rotary kiln 4, a second belt conveying mechanism 6 for conveying dried coke is arranged between the discharge hole of the rotary kiln 4 and the feed hole of the discharge bin 5, and the height of the feed hole of the rotary kiln 4 is higher than that of the discharge hole of the rotary kiln 4.

The wet coke in the quenching tank 2 is conveyed into the rotary kiln 4 through the first belt conveying mechanism 3, the combustion device 8 dries the wet coke in the rotary kiln 4 through heat generated by combustion, and the height of the feed port of the rotary kiln 4 is higher than that of the discharge port of the rotary kiln 4, so the wet coke moves towards the discharge port of the rotary kiln 4 under the action of gravity. In this process, the rotary kiln 4 rotates by itself, so that the wet coke is sufficiently contacted with the heat generated by the combustion device 8, and the wet coke is dried. The closed structure of the rotary kiln 4 can avoid the problem of heat loss during the drying of the wet coke, thereby improving the drying efficiency and saving the consumption of fuel; the moisture in the dried wet coke can be controlled between 2 percent and 10 percent, thereby meeting the set process requirements and meeting the market requirements.

The flue gas that produces among the wet burnt drying process is handled, is purified through gas cleaning device 7, and the closed structure of rotary kiln 4 can be retrieved the flue gas effectively, and then avoids the unable recovery of flue gas and causes environmental pollution's problem. The second belt conveying mechanism 6 conveys the dried coke to the discharge bin 5 for collection.

In this embodiment, the flue gas purification device 7 includes an exhaust pipe 71, an induced air pipe 72 and a spray pipe 73 that are connected in sequence, the lower end of the exhaust pipe 71 is communicated with the rotary kiln 4, an induced draft fan is arranged in the induced air pipe 72, a flue gas spraying desulfurization mechanism is arranged in the spray pipe 73, and a desulfurization liquid recovery device 74 is arranged at the bottom of the spray pipe 73.

It should be noted that the exhaust pipe 71 and the shower pipe 73 are both vertically arranged, the induced air pipe 72 is horizontally arranged, and one end of the induced air pipe 72 connected with the shower pipe 73 is located at the middle lower part of the shower pipe 73.

In the flue gas that wet burnt drying process produced led into induced duct 72 through blast pipe 71, the draught fan in the induced duct 72 can in time be with the flue gas introduction shower 73 in the rotary kiln 4, and after the flue gas got into shower 73, the flue gas sprayed desulfurization mechanism can filter the harmful gas in the flue gas to make the waste gas after the emission reach emission standard, the water accessible doctor solution recovery unit 74 that the flue gas sprayed desulfurization mechanism sprayed was retrieved.

In this embodiment, the combustion apparatus 8 includes an air blower 81 and a fuel gas source 82, an air outlet of the air blower 81 is communicated with the rotary kiln 4, and the fuel gas source 82 is communicated with the rotary kiln 4 through an air duct.

It should be noted that the air outlet of the air blower 81 is communicated with the end of the rotary kiln 4 provided with the discharge port, the gas source 82 is communicated with the end of the rotary kiln 4 provided with the discharge port through an air duct, the gas source 82 delivers the combustible gas into the rotary kiln 4 through the air duct and ignites the combustible gas, the combustible gas is combusted to generate heat, the generated heat flows towards the direction of the feed port of the rotary kiln 4 under the action of the air blower 81, and the wet coke is gradually dried in the process.

In this embodiment, go out feed bin 5 and be the infundibulate, the discharge gate that goes out feed bin 5 is connected with the feed inlet that the burnt device 9 that goes to the sieve of drying coke.

It should be noted that the dried coke in the discharging bin 5 can be temporarily stored, and the dried coke in the discharging bin 5 can fall into the dried coke screening device 9 under the action of gravity, so that the dried coke can be screened conveniently.

Above, only the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within range of protection.

Claims

1. The utility model provides a coal pyrolysis wet quenching drying system which characterized in that: comprises a coke quenching slot (2), a flue gas purification device (7), a rotary kiln (4), a combustion device (8) and a discharge bin (5) which are arranged below a coal pyrolysis furnace (1);

the utility model discloses a coke drying device, including quenching groove (2), be equipped with the wet burnt first belt transport mechanism (3) of conveying between the discharge gate of quenching groove (2) and the feed inlet of rotary kiln (4), the feed inlet department of rotary kiln (4) installs flue gas purification device (7), the discharge gate department of rotary kiln (4) is equipped with burner (8), the discharge gate of rotary kiln (4) with be equipped with second belt transport mechanism (6) that are used for conveying stoving burnt between the feed inlet of play feed bin (5), the height of rotary kiln (4) feed inlet is higher than the height of rotary kiln (4) discharge gate.

2. The coal pyrolysis wet quenching drying system of claim 1, wherein: flue gas purification device (7) are including blast pipe (71), induced duct (72) and shower (73) that connect gradually, blast pipe (71) lower extreme with rotary kiln (4) intercommunication, be equipped with the draught fan in induced duct (72), be equipped with the flue gas in shower (73) and spray desulfurization mechanism, shower (73) bottom is equipped with doctor solution recovery unit (74).

3. The coal pyrolysis wet quenching drying system of claim 1, wherein: the combustion device (8) comprises an air fan (81) and a fuel gas source (82), an air outlet of the air fan (81) is communicated with the rotary kiln (4), and the fuel gas source (82) is communicated with the rotary kiln (4) through a ventilation pipeline.

4. The coal pyrolysis wet quenching drying system of claim 1, wherein: go out feed bin (5) and be the infundibulate, the discharge gate that goes out feed bin (5) is connected with the feed inlet that the burnt sieve burnt device (9) of drying.