CN210906057U

CN210906057U - Environmental protection and energy saving recarburizer granulation system

Info

Publication number: CN210906057U
Application number: CN201921725120.2U
Authority: CN
Inventors: 姜洪金; 姜腾; 种江华
Original assignee: Ningxia Hongteng Technology Development Co ltd
Current assignee: Ningxia Hongteng Technology Development Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-07-03
Anticipated expiration: 2029-10-15

Abstract

The utility model relates to a recarburizer production technical field, an environmental protection and energy saving recarburizer granulation system, the gas vent of calcining the coal stove links to the rotary kiln through high temperature fan, row material room through the heat preservation pipeline, row material mouth of row material room lower part is just to water-cooling material feeding unit, water-cooling material feeding unit and calcining the coal stove and finished product packaging line between be equipped with material feeding unit, the feed end and the sealed rotation of deposit room of rotary kiln are connected, the deposit room lower part is equipped with blanking hopper, it and granulation raw materials storehouse between be equipped with material feeding unit, the deposit room top is equipped with the stoving feed bin of two hoppers, two hoppers insert the rotary kiln through main discharge pipe lower extreme, two hoppers are equipped with closure device separately; the settling chamber is connected with a surface cooler, the surface cooler comprises a group of U-shaped pipelines and a collecting chamber, a conveying device is arranged between the stirring machine and the granulator, a discharge port of the granulator faces to a feeding device, and the tail end of the granulator is positioned above a carburant granulation particle bin. The utility model has the advantages of waste heat utilization, pulverized coal utilization and dust pollution reduction.

Description

Environmental protection and energy saving recarburizer granulation system

The technical field is as follows:

the utility model relates to a carburant production technical field, in particular to carburant granulation system of environmental protection and energy saving.

Background art:

the carburant can be used as a carburant for steel making, a carburant for cast iron, and other additive materials, such as an additive for brake pads, as a friction material. The carburant belongs to the raw material of additional steel-making and iron-making carburant, and the high-quality carburant is an essential auxiliary additive for producing high-quality steel.

The carburant has various raw materials and different production processes, and comprises wood carbon, coal carbon, coke, graphite and the like, wherein various types of carburant have various small types. The high-quality carburant generally refers to a graphitized carburant, and the arrangement of carbon atoms is in a graphite microscopic form under a high-temperature condition, so that the graphitization is called as graphitization. Graphitization can reduce the content of impurities in the carburant, improve the carbon content of the carburant and reduce the sulfur content.

The carburant for the top-blown converter steel making has the requirements of high fixed carbon, low content of ash, volatile matter, sulfur, phosphorus, nitrogen and other impurities, dryness, cleanness and moderate granularity. The granularity is too fine and easy to burn out, and the granularity is too coarse and floats on the surface of molten steel, so that the granularity is not easy to be absorbed by the molten steel. The granularity of the induction furnace is 0.2-6 mm.

At present, in the process of producing the carburant by using high-quality raw coal, a coal calcining furnace is generally used for high-temperature oxygen-free calcination at 1200-1300 ℃, moisture and volatile components in the raw coal are burnt out, impurities are removed, the volatile component content of the high-quality raw coal is 7-8% even if the raw coal is high-quality Taixi coal, the volatile components are directly discharged after combustion, the temperature of the discharged gas is 700-800 ℃, and waste heat is serious. Since the calcined product generally contains 15% of fine particles (the particle size is less than 1mm), the fine particles are rarely purchased by downstream manufacturers, and are very cheap if sold, so that hundreds of tons of fine particles are often accumulated in a factory and are difficult to be effectively utilized.

The utility model has the following contents:

in view of this, it is necessary to design an environment-friendly and energy-saving recarburizer granulation system to solve the problems of difficulty in processing and utilizing pulverized coal, serious waste heat waste and serious dust in a factory.

An environment-friendly and energy-saving recarburizer granulation system, comprising: the device comprises a calcining coal furnace, a heat preservation pipeline, a high-temperature fan, a rotary kiln, a coal powder burner, a discharge chamber, a settling chamber, a drying material bin, a surface cooler, a stirrer, a granulator, a first feeding device, a water-cooling feeding device, a second feeding device, a third feeding device and a granulation raw material bin; wherein, the exhaust port of the calcining coal furnace is connected to the rotary kiln through a high-temperature fan and a discharge chamber by a heat-insulating pipeline, the discharge port of the rotary kiln is in sealed rotary connection with one wall surface of the discharge chamber, the other wall surface opposite to the wall surface is connected with the heat-insulating pipeline and a pulverized coal burner, the discharge port at the lower part of the discharge chamber is over against the feed hopper of a water-cooling feeding device, a first feeding device is arranged between the discharge port of the water-cooling feeding device and the feed inlet of the calcining coal furnace and between the discharge port of the water-cooling feeding device and a finished product packaging line, and the first feeding device respectively feeds different; the feeding end of the rotary kiln is connected with the settling chamber in a sealing and rotating mode, a blanking hopper is arranged on the lower portion of the settling chamber, a third feeding device is arranged between the blanking hopper and a granulating raw material bin, the granulating raw material bin is located above the stirring machine, a drying material bin is arranged above the settling chamber and comprises two bins, discharging pipes of the two bins are connected to a main discharging pipe, the lower end of the main discharging pipe is inserted into the feeding end of the rotary kiln, the outer wall of the main discharging pipe is sealed with the top of the settling chamber, the discharging pipes of the two bins are respectively provided with a closing device to control discharging, and the two bins are respectively a raw coal bin and a recarburizing agent granulating particle bin; the air outlet of the settling chamber is connected with a surface cooler, the surface cooler comprises a group of U-shaped pipelines and a collecting chamber, the U-shaped pipelines are positioned above the collecting chamber and are downwards inserted into the collecting chamber, the U-shaped pipelines are communicated with the inside of the collecting chamber, the U-shaped pipelines are connected in series through the collecting chamber, and the caliber of the collecting chamber is more than 1.5 times of the diameter of the U-shaped pipelines; a conveying device is arranged between the stirrer and the granulator, a discharge port of the granulator faces to a second feeding device, and the tail end of the second feeding device is positioned above a carburant granulation particle bin;

the water-cooling feeding device comprises: the device comprises a cylinder, a water tank, a feed hopper, a feeding screw, a riding wheel, an outer gear ring and a motor; the cylinder is cylindrical, the two ends of the cylinder are annular end surfaces, a feeding screw is welded on the inner wall of the cylinder, and the lower end of the feeding hopper extends into the feeding end of the cylinder from the center of the annular end surface; the cylinder is transversely arranged in the water tank, the water level of the water tank is lower than the width of a circular ring of the circular ring end surface, so that water does not flow into the cylinder, a riding wheel is arranged below the cylinder, and the cylinder is in transmission connection with a motor through an outer gear ring; a water pipe is arranged between the collection chamber and the water tank, and the cooling water of the collection chamber flows into the water tank through a fall.

Coal is always accumulated in the hopper-shaped discharge port of the discharge chamber, so that high-temperature gas can be effectively prevented from being discharged from the discharge port; similarly, a coal layer with a certain thickness is always kept in the drying material bin and the blanking hopper of the settling chamber, and high-temperature gas is prevented from being discharged from the drying material bin and the blanking hopper. And when the high-temperature gas is insufficient, starting the pulverized coal burner for auxiliary heating.

Preferably, the granulator is a twin-roll extrusion granulator.

Preferably, the number of the coal calcining furnace is multiple. The carbon/calcined coal enterprises are generally arranged near the coal producing area, the coal source is sufficient, each enterprise is provided with a plurality of calcined coal furnaces, and a plurality of similar enterprises are gathered nearby, so that the parallel exhaust of the plurality of calcined coal furnaces is facilitated.

Preferably, the closure means is a plate gate valve.

Preferably, a plurality of water buckets are distributed on the cylinder body of the water-cooling feeding device, when the cylinder body rotates, the water buckets scoop out water, and along with the continuous rotation of the cylinder body, water in the water buckets flows out to accelerate the cooling of the cylinder body similar to a water wheel.

Preferably, the granulator is provided with a plurality of discharge openings, and each discharge opening of the granulator faces the second feeding device.

Preferably, the third feeding device is a screw feeder.

Preferably, the first feeding device comprises: the device comprises a first bucket elevator, a temporary storage bin, a first belt conveyor, a second belt conveyor and a second bucket elevator; the feeding end of the first bucket elevator is located below the discharging opening of the water-cooling feeding device, the discharging end of the first bucket elevator faces the temporary storage bin, the discharging opening of the temporary storage bin faces the first belt conveyor, the tail end of the first belt conveyor is located above the feeding end of the second bucket elevator, the second bucket elevator is arranged beside the coal calcining furnace and supplies the coal calcining furnace, and one end of the second belt conveyor is located below the receiving end of the first belt conveyor. When dried raw coal is sent by the water-cooling feeding device, starting a first bucket elevator, a first belt conveyor and a second bucket elevator, wherein the first belt conveyor rotates forwards to send the raw coal to the coal calcining furnace; when the dried recarburizing agent granulated particles are sent by the water-cooling feeding device, the first bucket elevator, the first belt conveyor and the second belt conveyor are started, the first belt conveyor is reversed, the recarburizing agent granulated particles are discharged onto the second belt conveyor, and the recarburizing agent granulated particles are sent to a finished product packaging line by the second belt conveyor.

High-temperature waste gas generated by a calcining coal furnace is pressurized and sent into a discharging room through a high-temperature fan through a heat-insulating pipeline, so that the high-temperature waste gas is blown to the rotary kiln from the discharging room, and carries out convective heat exchange with raw coal/recarburizing agent granulation wet grains added into a drying material bin, the moisture of the raw coal/recarburizing agent granulation wet grains is evaporated, and small particles and coal powder in the raw coal/recarburizing agent granulation wet grains are blown into a blanking hopper of a settling chamber; high-temperature gas after heat exchange with raw coal/recarburizing agent granulation wet particles is wrapped with water vapor and carries part of fine dust in the raw coal to enter a surface cooler, dust is removed at a collecting chamber part, and the gas is cooled to below 170 ℃ at the tail part of the surface cooler and then the water vapor is condensed; and discharging the dried and dedusted wet granules of the raw coal/recarburizing agent granules from the discharging room. The raw coal/recarburizer granulation wet grains are fed according to batches, and each batch can only be one of the raw coal/recarburizer granulation wet grains, so that only one material is dried in the rotary kiln at the same time, and when the raw coal is dried, the dried raw coal is fed into the coal calcining furnace through the first feeding device; when the wet granules are dried, the wet granules are sent to a finished product packaging line through a first feeding device after being dried. The small particles and coal powder collected by the blanking hopper of the settling chamber are sent to a granulating raw material bin and are used as raw materials together with the coal powder sent from the calcining coal furnace to prepare carburant granulating wet granules. The raw coal/recarburizer pellets discharged from the discharge chamber require advanced water cooling because of their high temperature, and the water condensed by the surface cooler is fed into a water tank to cool the raw coal/recarburizer pellets.

The utility model improves the utilization rate of waste heat by drying the wet grain moisture of the raw coal/recarburizer granulation through the waste gas of the coal calcining furnace, and the coal powder discharged in the drying process greatly reduces the coal powder amount after calcination, namely reduces the later dust pollution; and the coal dust is reprocessed, so that the waste is changed into valuable, the economic value of the coal dust is improved by more than three times, the treatment problem of the coal dust is solved, the income of enterprises is increased, and the recarburizing agent can be produced in the north all seasons.

Description of the drawings:

FIG. 1 is a schematic diagram of an environmentally friendly and energy-saving recarburizer granulation system according to a preferred embodiment.

Fig. 2 is a schematic sectional view of a preferred embodiment of a coal calcining furnace.

Fig. 3 is an enlarged partial view of portion a of fig. 1.

In the figure: the calcining coal furnace 1, the heat preservation pipeline 21, the high-temperature fan 22, the rotary kiln 31, the pulverized coal burner 32, the discharge chamber 33, the settling chamber 34, the raw coal bin 35, the surface cooler 4, the stirrer 51, the granulator 52, the second feeding device 53, the first feeding device 61, the water-cooling feeding device 62, the third feeding device 71, the granulated raw material bin 72, the first bucket elevator 611, the temporary bin 612, the first belt conveyor 613, the second belt conveyor 614, the second bucket elevator 615, the feeding end 191, the discharging end 192, the innermost refractory brick 11, the preheating zone 111, the high-temperature zone 112, the cooling zone 113, the air duct 12, the combustion layer 13, the outer wall 14 of the furnace body, the intermediate refractory brick 15, the air layer 16, the labyrinth air duct 161, the air distribution hole 151, the main discharging pipe 351, the U-shaped pipeline 41, the collection chamber 42, the closing device 352, the cylinder body, the 622, the feed hopper 623, the feed spiral trough 624, the spiral trough 624, Riding wheel 625, outer gear 626 and water pipe 43.

The specific implementation mode is as follows:

in this patent, "raw coal" refers to coal that is purchased from an upstream enterprise to be processed into virgin calcined coal or a carburant.

As shown in fig. 1 to 3, an environment-friendly and energy-saving recarburizer granulation system comprises: the device comprises a calcining coal furnace 1, a heat preservation pipeline 21, a high-temperature fan 22, a rotary kiln 31, a pulverized coal burner 32, a discharge chamber 33, a settling chamber 34, a drying material bin 35, a surface cooler 4, a stirrer 51, a granulator 52, a first feeding device 61, a water-cooling feeding device 62, a second feeding device 53, a third feeding device 71 and a granulating raw material bin 72; wherein, the exhaust port of the calcining coal furnace 1 is connected to the rotary kiln 31 through the high-temperature fan 22 and the discharge chamber 33 by the heat preservation pipeline 21, the discharge port of the rotary kiln 31 is connected with one wall surface of the discharge chamber 33 in a sealing and rotating way, the other wall surface opposite to the wall surface is connected with the heat preservation pipeline 21 and the pulverized coal burner 32, the discharge port at the lower part of the discharge chamber 33 is over against the feed hopper of the water-cooling feeding device 62, a first feeding device 61 is arranged between the discharge port of the water-cooling feeding device 62 and the feed inlet of the calcining coal furnace 1 and between the discharge port of the water-cooling feeding device 62 and the finished product packaging line, and the first feeding device 61 respectively sends different; the feeding end of the rotary kiln 31 is connected with the settling chamber 34 in a sealing and rotating mode, a blanking hopper is arranged on the lower portion of the settling chamber 34, a third feeding device 71 is arranged between the blanking hopper and a granulating raw material bin 72, the granulating raw material bin 72 is located above the stirring machine 51, a drying material bin 35 is arranged above the settling chamber 34, the drying material bin 35 comprises two bins, discharging pipes of the two bins are connected to a main discharging pipe 351, the lower end of the main discharging pipe 351 is inserted into the feeding end of the rotary kiln 31, the outer wall of the main discharging pipe 351 is sealed with the top of the settling chamber 34, closing devices 352 are arranged on the discharging pipes of the two bins respectively to control discharging, and the two bins are a raw coal bin and a recarburizing agent granulating particle bin; the air outlet of the settling chamber 34 is connected with the surface cooler 4, the surface cooler 4 comprises a group of U-shaped pipelines 41 and a collection chamber 42, the U-shaped pipelines 41 are positioned above the collection chamber 42 and downwards inserted into the collection chamber 42, the U-shaped pipelines 41 are communicated with the interior of the collection chamber 42, the U-shaped pipelines 41 are connected in series through the collection chamber 42, and the caliber of the collection chamber 42 is more than 1.5 times of the diameter of the U-shaped pipelines 41; a conveying device (not shown) is arranged between the stirrer 51 and the granulator 52, the discharge port of the granulator 52 faces to a second feeding device 53, and the tail end of the second feeding device 53 is positioned above a carburant granulating particle bin;

in the present embodiment, the water-cooled feeding device 62 includes: the device comprises a cylinder 621, a water tank 622, a feed hopper 623, a feeding screw 624, a riding wheel 625, an outer gear ring 626 and a motor; the cylinder 621 is cylindrical, two ends of the cylinder 621 are annular end surfaces, a feeding screw 624 is welded on the inner wall of the cylinder 621, and the lower end of the feeding hopper 623 extends into the feeding end of the cylinder 621 from the center of the annular end surface; the cylinder 621 is transversely arranged in the water tank 622, the water tank 622 is of a concrete structure and is arranged under the ground, the water level of the water tank 622 is lower than the width of a circular ring of the circular ring-shaped end face, so that water cannot flow into the cylinder 621, a supporting wheel 625 is arranged below the cylinder 621, and the cylinder 621 is in transmission connection with a motor through an outer gear ring 626; a water pipe 43 is provided between the collection chamber 42 and the water tank 622, and the cooling water flows into the water tank 622 through the collection chamber 42 by a head drop.

Coal always keeps being accumulated in the hopper-shaped discharge opening of the discharge chamber 33, so that high-temperature gas can be effectively prevented from being discharged from the hopper-shaped discharge opening; similarly, a coal layer of a certain thickness is always maintained in the drying bin 35 and the dropping hopper of the settling chamber 34, and the high-temperature gas is prevented from being discharged therefrom.

In this embodiment, the granulator is a twin-roll extrusion granulator.

The coal calcining furnace can adopt any existing form, for the convenience of understanding, the following brief description is provided, the coal calcining furnace 1 is vertical, the upper opening is a feeding end 191, the lower opening is a discharging end 192, the region enclosed by the innermost layer refractory brick 11 of the furnace body from top to bottom is an inner hearth, the inner hearth is sequentially divided into a preheating region 111, a high temperature region 112 and a cooling region 113 from the feeding end to the discharging end, an air passage 12 is left between the top of the innermost layer refractory brick 11 and the furnace top, the air passage 12 is used for volatile components to enter a combustion layer 13 through the air passage, an intermediate layer refractory brick 15 is also built between the innermost layer refractory brick 11 and the outer wall 14 of the furnace body, the combustion layer 13 is arranged between the intermediate layer refractory brick 15 and the innermost layer refractory brick 11, an air layer 16 is arranged between the intermediate layer refractory brick 15 and the outer wall 14 of the furnace body, the top of the air layer 16 is closed, the lower part of the air layer 16 is open, the air distribution holes 151 allow air to flow into the combustion layer 13. The volatile component is combustible gas, the volatile component is gasified at 700-800 ℃, enters the combustion layer 13 through the furnace top air flue 12, and is subjected to small-amount combustion in the preheating zone 111 and large-amount combustion in the high-temperature zone 112 through adjusting the distribution section and the distribution amount of air through the position and the size of the air distribution hole 151, and the residual part is burnt out in the transition zone of the high-temperature zone 112 and the cooling zone 113. The calcined product is discharged through a discharge end 192.

In the present embodiment, the coal calcining furnace 1 is provided in plurality. The carbon/calcined coal enterprises are generally arranged near the coal producing area, the coal source is sufficient, each enterprise is provided with a plurality of calcined coal furnaces, and a plurality of similar enterprises are gathered nearby, so that the parallel exhaust of the plurality of calcined coal furnaces 1 is facilitated.

In this embodiment, the closing device 352 is a flat gate valve.

In the present embodiment, a plurality of water scoops (not shown) are distributed on the cylinder 621 of the water-cooling feeding device 62, and when the cylinder 621 rotates, the water scoops out the water, and as the cylinder 621 continues to rotate, similar to a water wheel, the water in the water scoops out to speed up the cooling of the cylinder 621.

In the present embodiment, the pelletizer 52 is provided in plurality, and the discharge port of each pelletizer 52 faces the second feeding device 53.

In the present embodiment, the third feeding device 71 is a screw feeder.

In the present embodiment, the first feeding device 61 includes: a first bucket elevator 611, a temporary storage bin 612, a first belt conveyor 613, a second belt conveyor 614, and a second bucket elevator 615; the feeding end of the first bucket elevator 611 is located below the discharging opening of the water-cooling feeding device 62, the discharging end of the first bucket elevator 611 faces the temporary storage bin 612, the discharging opening of the temporary storage bin 612 faces the first belt conveyor 613, the tail end of the first belt conveyor 613 is located above the feeding end of the second bucket elevator 615, the second bucket elevator 615 is arranged beside the calcining coal furnace 1 to feed the calcining coal furnace 1, and one end of the second belt conveyor 614 is located below the receiving end of the first belt conveyor 613. When the dried raw coal is sent by the water-cooled feeding device 62, the first bucket elevator 611, the first belt conveyor 613 and the second bucket elevator 615 are started, and the first belt conveyor 613 rotates forwards to send the raw coal to the coal calcining furnace 1; when the dried granulated carburant particles are sent from the water-cooled feeding device 62, the first bucket elevator 611, the first belt conveyor 613 and the second belt conveyor 614 are started, the first belt conveyor 613 is reversed, the granulated carburant particles are discharged onto the second belt conveyor 614, and the granulated carburant particles are sent to a finished product packaging line by the second belt conveyor 614.

High-temperature waste gas generated by the calcining coal furnace 1 is pressurized and sent into a discharging room 33 through a high-temperature fan 22 through a heat-insulating pipeline 21, the high-temperature waste gas is blown to the rotary kiln 31 from the discharging room 33, the high-temperature waste gas and raw coal/recarburizing agent granulation wet grains added into a drying material bin 35 are subjected to heat convection, the moisture of the raw coal/recarburizing agent granulation wet grains is evaporated, and small grains and coal powder in the raw coal/recarburizing agent granulation wet grains are blown into a blanking hopper of a settling chamber 34; the high-temperature gas after heat exchange with the raw coal/recarburizing agent granulation wet particles is wrapped with water vapor and carries part of fine dust in the raw coal to enter the surface cooler 4, and part of dust is removed in the collection chamber 42, and the gas is cooled to below 170 ℃ at the tail part of the surface cooler 4 and then the water vapor is condensed; the dried and dedusted wet granulated raw coal/recarburizer is discharged from the discharge chamber 33. Because the raw coal/recarburizer granulation wet grains are fed in batches, each batch can only be one of the raw coal/recarburizer granulation wet grains, only one material is dried in the rotary kiln 31 at the same time, and when the raw coal is dried, the dried raw coal is fed into the coal calcining furnace 1 through the first feeding device 61; when the wet granules are dried, the dried wet granules are sent to a finished product packaging line through a first feeding device 61. The small particles and the pulverized coal collected by the blanking hopper of the settling chamber 34 are sent to the granulation raw material bin 72 and used as raw materials together with the pulverized coal sent from the coal calcining furnace 1 to produce the recarburizer granulation wet granules. The raw coal/recarburizer pellets discharged from the discharge chamber 33 require advanced water cooling because of their high temperature, and the water condensed by the surface cooler 4 is fed into the water tank 622 to cool the raw coal/recarburizer pellets.

The pulverized coal burner 32 can be procured from existing equipment, which essentially comprises: a burner main body, a pulverized coal machine and an igniter; the burner main body is fixed in the middle of the discharge room, the tail part of the burner main body is exposed, and the pulverized coal machine and the igniter are respectively connected with the tail part of the burner main body through respective pipelines; the coal pulverizer includes: hopper, hammer crusher, fan.

Claims

1. An environmental-friendly and energy-saving recarburizer granulation system is characterized by comprising: the device comprises a calcining coal furnace, a heat preservation pipeline, a high-temperature fan, a rotary kiln, a coal powder burner, a discharge chamber, a settling chamber, a drying material bin, a surface cooler, a stirrer, a granulator, a first feeding device, a water-cooling feeding device, a second feeding device, a third feeding device and a granulation raw material bin; wherein, the exhaust port of the calcining coal furnace is connected to the rotary kiln through a high-temperature fan and a discharge chamber by a heat-insulating pipeline, the discharge port of the rotary kiln is in sealed rotary connection with one wall surface of the discharge chamber, the other wall surface opposite to the wall surface is connected with the heat-insulating pipeline and a pulverized coal burner, the discharge port at the lower part of the discharge chamber is over against the feed hopper of a water-cooling feeding device, a first feeding device is arranged between the discharge port of the water-cooling feeding device and the feed inlet of the calcining coal furnace and between the discharge port of the water-cooling feeding device and a finished product packaging line, and the first feeding device respectively sends different; the feeding end of the rotary kiln is connected with the settling chamber in a sealing and rotating mode, a blanking hopper is arranged on the lower portion of the settling chamber, a third feeding device is arranged between the blanking hopper and a granulating raw material bin, the granulating raw material bin is located above the stirring machine, a drying material bin is arranged above the settling chamber and comprises two bins, discharging pipes of the two bins are connected to a main discharging pipe, the lower end of the main discharging pipe is inserted into the feeding end of the rotary kiln, the outer wall of the main discharging pipe is sealed with the top of the settling chamber, the discharging pipes of the two bins are respectively provided with a closing device to control discharging, and the two bins are respectively a raw coal bin and a recarburizing agent granulating particle bin; the air outlet of the settling chamber is connected with a surface cooler, the surface cooler comprises a group of U-shaped pipelines and a collecting chamber, the U-shaped pipelines are positioned above the collecting chamber and are downwards inserted into the collecting chamber, the U-shaped pipelines are communicated with the inside of the collecting chamber, the U-shaped pipelines are connected in series through the collecting chamber, and the caliber of the collecting chamber is more than 1.5 times of the diameter of the U-shaped pipelines; a conveying device is arranged between the stirrer and the granulator, a discharge port of the granulator faces to a second feeding device, and the tail end of the second feeding device is positioned above a carburant granulation particle bin;

2. The environment-friendly and energy-saving recarburizer granulation system according to claim 1, wherein the granulator is a twin-roll extrusion granulator.

3. The environmentally friendly and energy efficient recarburizer granulation system according to claim 1, wherein the closing means is a plate gate valve.

4. The environment-friendly and energy-saving recarburizer granulation system as claimed in claim 1, wherein a plurality of water hoppers are distributed on the cylinder of the water-cooled feeding device.

5. The environment-friendly and energy-saving recarburizer granulation system as claimed in claim 1, wherein the granulator is provided in plurality, and the discharge port of each granulator faces the second feeding device.

6. The environmentally friendly and energy efficient recarburizer granulation system according to claim 1, wherein the third feeding means is a screw feeder.

7. The environmentally friendly and energy efficient recarburizer granulation system according to claim 1, wherein the first feeding means comprises: the device comprises a first bucket elevator, a temporary storage bin, a first belt conveyor, a second belt conveyor and a second bucket elevator; the feeding end of the first bucket elevator is located below the discharging opening of the water-cooling feeding device, the discharging end of the first bucket elevator faces the temporary storage bin, the discharging opening of the temporary storage bin faces the first belt conveyor, the tail end of the first belt conveyor is located above the feeding end of the second bucket elevator, the second bucket elevator is arranged beside the coal calcining furnace and supplies the coal calcining furnace, and one end of the second belt conveyor is located below the receiving end of the first belt conveyor.