阅读说明：本技术 无料钟炉顶装料装置及其装料方法 (Bell-less top charging device and charging method thereof ) 是由 刘坤伦 宋华 陈明 赵艳红 于 2020-05-20 设计创作，主要内容包括：本发明提供了一种无料钟炉顶装料装置,包括：布料料罐,用于将物料输送至一高炉的炉内,其顶部和底部分别设置有上密封阀及下密封阀,上密封阀打开时,布料料罐接收物料,下密封阀打开时,布料料罐向炉内输送物料；充气管路,包括第一管路及第二管路,第一管路的出气端及第二管路的出气端均与布料料罐连通以分别向布料料罐输送氮气；布料料罐接收完物料后,下密封阀关闭,第一管路导通,第二管路关闭；布料料罐向炉内输送物料时,下密封阀打开,第二管路导通。导通第一管路时利用氮气进行均压,避免了高炉煤气的使用,导通第二管路时有效避免了在布料过程中炉内的高炉煤气进入布料料罐,进而避免了均压放散时对大气造成污染。(The invention provides a bell-less top charging device, comprising: the material distributing tank is used for conveying materials into a furnace of a blast furnace, an upper sealing valve and a lower sealing valve are respectively arranged at the top and the bottom of the material distributing tank, the material distributing tank receives the materials when the upper sealing valve is opened, and the material distributing tank conveys the materials into the furnace when the lower sealing valve is opened; the gas charging pipeline comprises a first pipeline and a second pipeline, and the gas outlet end of the first pipeline and the gas outlet end of the second pipeline are communicated with the material distribution tank to respectively convey nitrogen to the material distribution tank; after the material distributing tank receives the materials, the lower sealing valve is closed, the first pipeline is conducted, and the second pipeline is closed; when the material distributing tank conveys materials into the furnace, the lower sealing valve is opened, and the second pipeline is conducted. Utilize nitrogen gas to carry out the voltage-sharing when switching on first pipeline, avoided blast furnace gas's use, effectively avoided the blast furnace gas in the distribution in-process stove to get into the material distributing tank when switching on the second pipeline, and then caused the pollution to the atmosphere when having avoided the voltage-sharing to diffuse.)

1. A bell-less top charging apparatus, comprising:

the material distribution tank is used for conveying materials into a furnace of a blast furnace, an upper sealing valve and a lower sealing valve are respectively arranged at the top and the bottom of the material distribution tank, the material distribution tank receives the materials when the upper sealing valve is opened, and the material distribution tank conveys the materials into the furnace when the lower sealing valve is opened;

the gas charging pipeline comprises a first pipeline and a second pipeline, and the gas outlet end of the first pipeline and the gas outlet end of the second pipeline are communicated with the material distribution tank to respectively convey nitrogen to the material distribution tank;

after the material distributing tank receives the materials, the upper sealing valve is closed, the first pipeline is conducted, the second pipeline is closed, and the first pipeline is closed until the pressure in the material distributing tank is higher than the pressure in the furnace; when the material distributing tank conveys the materials into the furnace, the lower sealing valve is opened, and the second pipeline is conducted.

2. The bell-less top charging installation according to claim 1, wherein said first pipeline is provided with a pressure equalizing valve, and after said distribution charging bucket has received said material, said upper sealing valve is closed, and said pressure equalizing valve is opened until said pressure in said distribution charging bucket is greater than said pressure in said furnace.

3. The bell-less top charging installation according to claim 1 or 2, wherein said second pipeline is provided with an air compensating valve and an air compensating regulating valve, when said material distributing bucket delivers said material into said furnace, said lower sealing valve is opened, said air compensating valve and said air compensating regulating valve are both opened, and said air compensating regulating valve is used for regulating the flow of nitrogen gas in said second pipeline.

4. The bell-less top charging installation according to claim 1, wherein the bottom of the distribution bucket is further provided with a material flow regulating valve, said material flow regulating valve being located above said lower sealing valve.

5. The bell-less top charging apparatus as defined in claim 1, wherein said inlet end of said first conduit and said inlet end of said second conduit are each in communication with a nitrogen buffer tank.

6. The bellless top charging installation according to claim 1, further comprising an exhaust line on which a first pressure-equalizing blow-off valve and a second pressure-equalizing blow-off valve are arranged in parallel, the aperture of said first pressure-equalizing blow-off valve being smaller than the aperture of said second pressure-equalizing blow-off valve.

7. The bell-less top charging installation according to claim 6, wherein a bag-type dust collector is further provided on said exhaust line, and an air inlet end of said bag-type dust collector is in communication with an air outlet end of said first pressure-equalizing blow-off valve and an air outlet end of said second pressure-equalizing blow-off valve.

8. The bell-less top charging installation according to claim 7, wherein said exhaust duct is also provided with a fan, said fan being in communication with the air outlet end of said bag-type dust collector.

9. The bell-less top charging installation according to claim 6, wherein said distribution bucket is provided with an air inlet, and both the air outlet end of said charging line and the air inlet end of said exhaust line are communicated with said air inlet.

10. The bell-less top charging installation according to claim 6, wherein said distribution bucket is provided with an air inlet hole and an air outlet hole, the air outlet end of said gas charging line is communicated with said air inlet hole, and the air inlet end of said gas discharging line is communicated with said air outlet hole.

11. A method of charging a bell-less top charging installation as claimed in any one of claims 1 to 10, comprising:

opening an upper sealing valve of a material distribution tank, and conveying materials into the material distribution tank;

closing the upper sealing valve, and conveying nitrogen into the material distribution tank through a first pipeline until the pressure in the material distribution tank is greater than the pressure in the furnace, and closing the first pipeline;

and opening a lower sealing valve of the material distribution tank to convey the material into the furnace, and conveying nitrogen into the material distribution tank through a second pipeline until all the material in the material distribution tank enters the furnace, and then closing the second pipeline and the lower sealing valve.

12. The charging method for a bell-less top charging installation according to claim 11, wherein said second line is provided with an air compensating valve and an air compensating regulating valve, and when nitrogen gas is supplied into said distribution tank through said second line, the opening of said air compensating regulating valve is controlled to regulate the flow rate of nitrogen gas in said second line.

13. The method of charging a bellless top charging installation according to claim 11, wherein said bellless top charging installation further comprises an exhaust line, said exhaust line being provided in parallel with a first pressure equalizing blow-off valve and a second pressure equalizing blow-off valve, the diameter of said first pressure equalizing blow-off valve being smaller than the diameter of said second pressure equalizing blow-off valve until after all the material in said distribution tank enters said furnace and after said second line and said lower sealing valve are closed, said method of charging a bellless top charging installation further comprising:

opening the first pressure-equalizing relief valve, and discharging nitrogen in the material distribution tank by using the first pressure-equalizing relief valve;

and after a set time, opening the second pressure-equalizing blow-off valve, and simultaneously discharging nitrogen in the material distribution tank by using the first pressure-equalizing blow-off valve and the second pressure-equalizing blow-off valve.

Technical Field

The invention relates to the technical field of blast furnace iron making, in particular to a bell-less furnace top charging device and a charging method thereof.

Background

In the current blast furnace iron making, a bell-less top charging device is mostly adopted for charging. The bell-less top charging device generally comprises a material distribution tank and an inflation pipeline, wherein the material distribution tank is used for conveying materials (referred to as material distribution in the industry) into a furnace of the blast furnace, and the inflation pipeline is used for conveying gas for the material distribution tank so as to increase the pressure in the material distribution tank (referred to as pressure equalization in the industry).

Before the material distributing tank conveys materials into the blast furnace, the material distributing tank is generally subjected to pressure equalization firstly, so that the pressure in the material distributing tank is slightly higher than the pressure in the furnace, and the materials can conveniently enter the furnace. The currently common pressure equalizing method is a secondary pressure equalizing method, namely purified blast furnace gas is firstly used as a primary pressure equalizing gas to be conveyed into the material distributing tank, and nitrogen is used as a secondary pressure equalizing gas to be conveyed into the material distributing tank until the pressure in the material distributing tank is slightly higher than that in the furnace because the pressure of the purified blast furnace gas is lower than that of the gas in the furnace. Although the purified blast furnace gas avoids oxygen from entering the material distribution tank, toxic and harmful components such as carbon monoxide, hydrogen sulfide and the like and steam in the blast furnace gas also enter the material distribution tank. In addition, in the process of distributing materials in the material distribution tank into the blast furnace after the material tank is pressurized, the materials in the material distribution tank enter the blast furnace, so that the pressure in the material distribution tank is reduced, blast furnace gas in the furnace enters the material distribution tank to supplement the space left by the materials, and the blast furnace gas also contains toxic and harmful components such as CO, H2S and the like and water vapor.

After the material distribution is finished, the material needs to be loaded firstly for next material distribution, but before the material is loaded, the gas in the material distribution tank needs to be diffused, so that the pressure in the material distribution tank is reduced to the atmospheric pressure. As mentioned above, because the material distribution charging bucket is filled with blast furnace gas in the pressure equalizing and material distribution processes, at present, coarse particle dust is generally removed by the cyclone dust collector and then discharged to the atmosphere through the silencer, which causes great pollution to the environment, and the silencer is easily blocked by the dust and the steam in the blast furnace gas. Therefore, there is a need to provide a bell-less top charging device to prevent the charging bucket from entering the blast furnace gas during the pressure equalizing and charging process.

Disclosure of Invention

The invention aims to provide a bell-less top charging device and a charging method thereof, which can effectively prevent blast furnace gas from entering a material distribution tank in the pressure equalizing and material distribution processes, and further avoid pollution to the atmosphere when pressure equalizing and diffusing.

In order to achieve the above object, the present invention provides a bell-less top charging apparatus comprising:

the material distribution tank is used for conveying materials into a furnace of a blast furnace, an upper sealing valve and a lower sealing valve are respectively arranged at the top and the bottom of the material distribution tank, the material distribution tank receives the materials when the upper sealing valve is opened, and the material distribution tank conveys the materials into the furnace when the lower sealing valve is opened;

the gas charging pipeline comprises a first pipeline and a second pipeline, and the gas outlet end of the first pipeline and the gas outlet end of the second pipeline are communicated with the material distribution tank to respectively convey nitrogen to the material distribution tank;

after the material distributing tank receives the materials, the upper sealing valve is closed, the first pipeline is conducted, the second pipeline is closed, and the first pipeline is closed until the pressure in the material distributing tank is higher than the pressure in the furnace; when the material distributing tank conveys the materials into the furnace, the lower sealing valve is opened, and the second pipeline is conducted.

Optionally, a pressure equalizing valve is arranged on the first pipeline, after the material distributing tank receives the material, the upper sealing valve is closed, and the pressure equalizing valve is opened until the pressure in the material distributing tank is greater than the pressure in the furnace, and the pressure equalizing valve is closed.

Optionally, an air compensating valve and an air compensating regulating valve are arranged on the second pipeline, the material distributing tank conveys materials in the furnace, the lower sealing valve is opened, the air compensating valve and the air compensating regulating valve are both opened, and the air compensating regulating valve is used for regulating the flow of nitrogen in the second pipeline.

Optionally, the bottom of the material distribution tank is further provided with a material flow adjusting valve, and the material flow adjusting valve is located above the lower sealing valve.

Optionally, the air inlet end of the first pipeline and the air inlet end of the second pipeline are both communicated with a nitrogen buffer tank.

Optionally, the bell-less top charging device further comprises an exhaust pipeline, a first pressure-equalizing blow-off valve and a second pressure-equalizing blow-off valve are connected in parallel on the exhaust pipeline, and the caliber of the first pressure-equalizing blow-off valve is smaller than that of the second pressure-equalizing blow-off valve.

Optionally, a bag-type dust collector is further disposed on the exhaust pipeline, and an air inlet end of the bag-type dust collector is communicated with an air outlet end of the first pressure-equalizing blow-off valve and an air outlet end of the second pressure-equalizing blow-off valve.

Optionally, a fan is further arranged on the exhaust pipeline, and the fan is communicated with the air outlet end of the bag-type dust collector.

Optionally, an air inlet is arranged on the material distribution tank, and the air outlet end of the inflation pipeline and the air inlet end of the exhaust pipeline are communicated with the air inlet.

Optionally, an air inlet and an air outlet are arranged on the material distribution tank, the air outlet end of the inflation pipeline is communicated with the air inlet, and the air inlet end of the exhaust pipeline is communicated with the air outlet.

Based on this, the present application also provides a charging method of the bell-less top charging installation, comprising:

opening an upper sealing valve of a material distribution tank, and conveying materials into the material distribution tank;

closing the upper sealing valve, and conveying nitrogen into the material distribution tank through a first pipeline until the pressure in the material distribution tank is greater than the pressure in the furnace, and closing the first pipeline;

and opening a lower sealing valve of the material distribution tank to convey the material into the furnace, and conveying nitrogen into the material distribution tank through a second pipeline until all the material in the material distribution tank enters the furnace, and then closing the second pipeline and the lower sealing valve.

Optionally, an air compensating valve and an air compensating adjusting valve are arranged on the second pipeline, and when nitrogen is conveyed into the material distributing tank through the second pipeline, the opening degree of the air compensating adjusting valve is controlled to adjust the flow of the nitrogen in the second pipeline.

Optionally, the bell-less top charging device further includes an exhaust pipe, a first pressure-equalizing blow-off valve and a second pressure-equalizing blow-off valve are connected in parallel to the exhaust pipe, a caliber of the first pressure-equalizing blow-off valve is smaller than a caliber of the second pressure-equalizing blow-off valve, until all the materials in the material distributing tank enter the furnace, the second pipeline is closed and the lower sealing valve is closed, and the charging method of the bell-less top charging device further includes:

opening the first pressure-equalizing relief valve, and discharging nitrogen in the material distribution tank by using the first pressure-equalizing relief valve;

and after a set time, opening the second pressure-equalizing blow-off valve, and simultaneously discharging nitrogen in the material distribution tank by using the first pressure-equalizing blow-off valve and the second pressure-equalizing blow-off valve.

The invention provides a bell-less furnace top charging device and a charging method thereof, wherein the bell-less furnace top charging device comprises: the material distribution tank is used for conveying materials into a furnace of a blast furnace, an upper sealing valve and a lower sealing valve are respectively arranged at the top and the bottom of the material distribution tank, the material distribution tank receives the materials when the upper sealing valve is opened, and the material distribution tank conveys the materials into the furnace when the lower sealing valve is opened; the gas charging pipeline comprises a first pipeline and a second pipeline, and the gas outlet end of the first pipeline and the gas outlet end of the second pipeline are communicated with the material distribution tank to respectively convey nitrogen to the material distribution tank; after the material distributing tank receives the materials, the upper sealing valve is closed, the first pipeline is conducted, the second pipeline is closed, and the first pipeline is closed until the pressure in the material distributing tank is higher than the pressure in the furnace; when the material distributing tank conveys the materials into the furnace, the lower sealing valve is opened, and the second pipeline is conducted. Utilize nitrogen gas to carry out the voltage-sharing when switching on first pipeline, avoided blast furnace gas's use, effectively avoided the blast furnace gas in the distribution in-process stove to get into the material distributing tank when switching on the second pipeline, and then caused the pollution to the atmosphere when having avoided the voltage-sharing to diffuse.

Drawings

Fig. 1 is a schematic structural view of a bell-less top charging installation according to an embodiment of the present invention;

fig. 2 is a step diagram of a charging method of a bellless top charging apparatus provided in accordance with an embodiment of the present invention;

wherein the reference numerals are:

10-material distributing tank; 20-in the furnace; 31-an upper sealing valve; 32-a lower sealing valve; 41-a first conduit; 42-a second conduit; 51-a material blocking valve; 52-a stream regulating valve; 60-material receiving tank; 70-rotating the chute; 80-a nitrogen buffer tank; 90-an exhaust line;

410-a pressure equalizing valve; 420-air supplement valve; 421-air supplement regulating valve; 910-first pressure equalizing relief valve; 920-a second pressure equalizing relief valve; 930-bag dust collector; 940-a fan.

Detailed Description

The following describes in more detail embodiments of the present invention with reference to the schematic drawings. Advantages and features of the present invention will become apparent from the following description and claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As shown in fig. 1, the present embodiment provides a bell-less top charging installation comprising:

the material distributing tank 10 is used for conveying materials to the inside 20 of a blast furnace, an upper sealing valve 31 and a lower sealing valve 32 are respectively arranged at the top and the bottom of the material distributing tank 10, when the upper sealing valve 31 is opened, the material distributing tank 10 receives the materials, and when the lower sealing valve 32 is opened, the material distributing tank 10 conveys the materials to the inside 20 of the blast furnace;

the gas charging pipeline comprises a first pipeline 41 and a second pipeline 42, and the gas outlet end of the first pipeline 41 and the gas outlet end of the second pipeline 42 are both communicated with the material distribution tank 10 to respectively convey nitrogen to the material distribution tank 10;

after the material distributing tank 10 receives the material, the upper sealing valve 31 is closed, the first pipeline 41 is conducted, the second pipeline 42 is closed, and the first pipeline 41 is closed until the pressure in the material distributing tank 10 is higher than the pressure in the furnace 20; when the material distributing tank 10 delivers the material to the furnace 20, the lower sealing valve 32 is opened, and the second pipeline 42 is connected.

Specifically, the bell-less top charging device is suitable for bell-less top charging equipment of two types, namely a parallel tank type and a serial tank type. The cloth material jar 10 is used for receiving and storing the material to distribute the material on the charge level of 20 in the stove, there is upper seal valve 31 at the top of cloth material jar 10, the top of upper seal valve 31 is provided with material stop valve 51, and when cloth material jar 10 received the material, because be provided with the rubber circle on the upper seal valve 31, for avoiding the material with rubber circle direct contact needs open material stop valve 51 earlier, then opens upper seal valve 31, when closing upper seal valve 31, needs close material stop valve 51 earlier to the protection upper seal valve.

The bottom is provided with a lower sealing valve 32, a material flow regulating valve 52 for regulating the material flow is arranged above the lower sealing valve 32, and the upper sealing valve 31, the lower sealing valve 32 and the material flow regulating valve 52 are driven by a cylinder generally. The material flow regulating valve 52 is used for regulating the flow of the material and protecting the lower sealing valve 32. When releasing the material, since the lower sealing valve 32 is provided with the rubber ring, in order to avoid the material from directly contacting with the rubber ring, the lower sealing valve 32 needs to be opened first, and then the material flow regulating valve 52 needs to be opened. After the material release is completed, the material flow regulating valve 52 is closed, and then the lower sealing valve 32 is closed.

In this embodiment, the bell-less top charging apparatus further comprises a charging bucket 60 and a rotating chute 70. The material receiving tank 60 is a hopper-shaped material receiving container for receiving and delivering the material into the material distributing tank 10.

The rotating chute 70 is used for distributing the material in the material distributing bucket 10 on the receiving surface of the furnace 20. The rotating chute 70 can rotate around the center of the blast furnace and can change the included angle between the rotating chute and the center line of the blast furnace, and the two movements are carried out independently. Therefore, when sufficient electrical or electronic control equipment is used, the material can be distributed in various manners, including circular arc, spiral, fan-shaped and the like.

The charging line is used for conveying nitrogen to the material distribution tank 10, and the nitrogen can be conveyed to the material distribution tank 10 as pressure-equalizing nitrogen due to the fact that a byproduct nitrogen is generated in oxygen generation in a steel and iron combination enterprise, and cost is saved. It will be appreciated that inert nitrogen other than nitrogen may also be used as the fill gas, such as argon, helium, and the like, and the application is not limited thereto.

The inflation pipeline comprises a first pipeline 41 and a second pipeline 42, the air inlet end of the first pipeline 41 and the air inlet end of the second pipeline 42 are communicated with a nitrogen buffer tank 80, and the air outlet end of the first pipeline 41 and the air outlet end of the second pipeline 42 are communicated with the material distribution tank 10. After the material distributing tank 10 receives the material, the upper sealing valve 31 is closed, and at this time, nitrogen is provided to the material distributing tank 10 through the first pipeline 41, so that the pressure in the material distributing tank 10 is slightly higher than the pressure in the furnace 20, and then the first pipeline 41 is closed. After the pressure equalizing is completed, when the material distributing tank 10 conveys the materials to the inside of the furnace 20, the lower sealing valve 32 is opened, nitrogen is provided for the material distributing tank 10 through the second pipeline 42, the space reserved after the materials leave the material distributing tank 10 is filled, and the coal gas in the furnace 20 is prevented from entering the material distributing tank 10. It should be understood that when the upper sealing valve 31, the lower sealing valve 32, the first pipe 41, the second pipe 42, and the like are configured to be in the open state, they are not mentioned herein, and the closed state is defaulted.

In this embodiment, nitrogen buffer tank 80 is the nitrogen buffer tank, the pressure influence to the nitrogen pipe network when the nitrogen buffer tank's primary function reduces the pressure-sharing.

Referring to fig. 1, a pressure equalizing valve 410 is disposed on the first pipeline 41, after the material distributing tank 10 receives the material, the upper sealing valve 31 is closed, and the pressure equalizing valve 410 is opened until the pressure inside the material distributing tank 10 is greater than the pressure inside the furnace 20, and the pressure equalizing valve 410 is closed. In this embodiment, the pressure equalizing valve 410 is a shut-off valve for controlling the conduction of the first pipeline 41.

Referring to fig. 1, an air compensating valve 420 and an air compensating regulating valve 421 are arranged on the second pipeline 42, when the material distributing tank 10 conveys the material to the furnace 20, the lower sealing valve 32 is opened, the air compensating valve 420 and the air compensating regulating valve 421 are both opened, and the air compensating regulating valve 421 is used for regulating the flow of the nitrogen in the second pipeline 42. The air compensating valve 420 is used for controlling the conduction of the second pipeline 42, and when the material distributing tank 10 conveys the material to the interior of the furnace 20, the opening degree of the air compensating adjusting valve 421 is controlled according to the discharging speed, so that the nitrogen flow conveyed by the second pipeline 42 is controlled, the space reserved after the material leaves the material distributing tank 10 is filled better, and the blast furnace gas in the furnace 20 is prevented from entering the material distributing tank 10. In addition, excessive nitrogen gas can be prevented from entering the blast furnace interior 20.

With reference to fig. 1, the bell-less top charging device further includes an exhaust pipe 90, a first pressure equalizing relief valve 910 and a second pressure equalizing relief valve 920 are connected in parallel to the exhaust pipe 90, and a diameter of the first pressure equalizing relief valve 910 is smaller than a diameter of the second pressure equalizing relief valve 920. After the material distribution is completed, in order to perform the next material distribution, the material needs to be charged again, but before charging, the nitrogen in the material distribution tank 10 must be firstly diffused, so that the pressure in the material distribution tank 10 is reduced to the atmospheric pressure, and at this time, the pressure equalization diffusion can be performed through the exhaust pipeline 90, so that the pressure in the material distribution tank 10 is reduced to the atmospheric pressure, and the material charging is facilitated. After the distribution is finished, the pressure in the distribution tank 10 is high, the first pressure equalizing relief valve 910 is opened first to prevent the nitrogen pressure from damaging other components in the exhaust pipeline 90, such as a dust removal component, and after a certain time, when the pressure in the distribution tank 10 is reduced to a certain degree, the second pressure equalizing relief valve 920 is opened to accelerate the relief speed of the nitrogen. After the diffusion is finished, the upper sealing valve 31 can be opened, the material in the receiving tank 60 enters the material distributing tank 10, and the loading and unloading can be realized by repeating the operation. The valves with different calibers can reduce the flow of instantly diffused nitrogen under the condition that the total diffusion time is not obviously prolonged, thereby reducing the scale of a dust removal component and saving the cost.

Optionally, a bag-type dust collector 930 is further disposed on the exhaust pipeline 90, and an air inlet end of the bag-type dust collector 930 is communicated with an air outlet end of the first pressure-equalizing blow-off valve 910 and an air outlet end of the second pressure-equalizing blow-off valve 920. The sack cleaner 930 compares traditional cyclone dust removal effect better, and the dust emission concentration is lower to because do not contain poisonous and harmful ingredients such as CO, H2S and vapor in the nitrogen gas of diffusing, discharge after removing dust through sack cleaner 930, can eliminate the dust to atmospheric pollution, noise pollution when also having eliminated the voltage-sharing and diffusing has avoided the use of silencer.

Optionally, a fan 940 is further disposed on the exhaust pipeline 90, and the fan 940 is communicated with an air outlet end of the bag-type dust collector 930. The fan 940 is used for ensuring the negative pressure environment of the bag-type dust collector 930, so that the air leakage and dust carrying of the dust collector to the atmosphere are avoided, and the good operation of the bag-type dust collector 930 is ensured.

In this embodiment, an air inlet is disposed on the material distribution tank 10, and the air outlet end of the inflation pipeline and the air inlet end of the air outlet pipeline 90 are both communicated with the air inlet. It can be understood that the air outlet end of the inflation pipeline is connected in parallel with the air inlet end of the exhaust pipeline 90 and then communicated with the air inlet of the material distribution tank 10, so that the structure of the material distribution tank 10 is simplified. Or, be provided with an inlet port and venthole on the cloth material jar 10, the end of giving vent to anger of gas charging line with the inlet port intercommunication, the inlet end of exhaust pipe 90 with the venthole intercommunication, promptly gas charging line with exhaust pipe 90 respectively with cloth material jar 10 intercommunication. In this embodiment, the air intake holes. The positions and the number of the air outlet holes are not limited at all.

Based on this, the present application also provides a charging method of the bell-less top charging apparatus, referring to fig. 2 in combination with fig. 1, including:

step S1: opening an upper sealing valve 31 of the material distributing tank 10, and conveying the material into the material distributing tank 10;

step S2: closing the upper sealing valve 31, and delivering nitrogen into the material distribution tank 10 through a first pipeline 41 until the pressure in the material distribution tank 10 is greater than the pressure in the furnace 20, and closing the first pipeline 41;

step S3: and opening the lower sealing valve 32 of the material distribution tank 10 to convey the material to the furnace 20, and conveying nitrogen into the material distribution tank 10 through a second pipeline 42 until the material in the material distribution tank 10 completely enters the furnace 20, and then closing the second pipeline 42 and the lower sealing valve 32.

First, step S1 is executed to open the upper sealing valve 31 of the material distributing bucket 10 and deliver the material into the material distributing bucket 10 through the material receiving bucket 60.

And then executing step S2, equalizing and inflating the material distribution tank 10, closing the upper sealing valve 31, opening the equalizing valve 410, and delivering nitrogen into the material distribution tank 10 through the first pipeline 41 until the pressure in the material distribution tank 10 is greater than the pressure in the furnace 20, and closing the equalizing valve 410.

And then, executing a step S3, opening the lower sealing valve 32 of the material distribution tank 10 to convey the material to the furnace 20, simultaneously opening the air supply valve 420 and the air supply adjusting valve 421, conveying nitrogen gas into the material distribution tank 10 through the second pipeline 42 until all the materials in the material distribution tank 10 enter the furnace 20, and then closing the air supply valve 420, the air supply adjusting valve 421 and the lower sealing valve 32.

After performing step S3, the charging method of the bell-less top charging apparatus further comprises:

s4: firstly, opening a first pressure equalizing and bleeding valve 910, and discharging nitrogen in the material distribution tank 10 by using the first pressure equalizing and bleeding valve 910;

s5: after a set time, opening the second pressure-equalizing blow-off valve 920, and simultaneously discharging the nitrogen in the material distribution tank 10 by using the first pressure-equalizing blow-off valve 910 and the second pressure-equalizing blow-off valve 920.

After the discharging is completed, step S4 is executed first, the first pressure equalizing relief valve 910 is opened, and the nitrogen gas in the material distribution tank 10 is discharged by using the first pressure equalizing relief valve 910, so that the pressure in the material distribution tank 10 is reduced, and the flow of the instantaneously relieved nitrogen gas is reduced.

Then, in step S5, after a predetermined time has elapsed, the second pressure equalizing and bleeding valve 920 is opened, and the nitrogen gas in the material distribution tank 10 is discharged at the same time by the first pressure equalizing and bleeding valve 910 and the second pressure equalizing and bleeding valve 920. In this embodiment, when step S5 is executed, the nitrogen gas discharged from the first pressure equalizing and bleeding valve 910 and the second pressure equalizing and bleeding valve 920 is sequentially processed by a bag-type dust collector 930 and a fan 940, and then discharged to the atmosphere.

In summary, the present invention provides a bell-less top charging device and a charging method thereof, comprising: the material distribution tank is used for conveying materials into a furnace of a blast furnace, an upper sealing valve and a lower sealing valve are respectively arranged at the top and the bottom of the material distribution tank, the material distribution tank receives the materials when the upper sealing valve is opened, and the material distribution tank conveys the materials into the furnace when the lower sealing valve is opened; the gas charging pipeline comprises a first pipeline and a second pipeline, and the gas outlet end of the first pipeline and the gas outlet end of the second pipeline are communicated with the material distribution tank to respectively convey nitrogen to the material distribution tank; after the material distributing tank receives the materials, the upper sealing valve is closed, the first pipeline is conducted, the second pipeline is closed, and the first pipeline is closed until the pressure in the material distributing tank is higher than the pressure in the furnace; when the material distributing tank conveys the materials into the furnace, the lower sealing valve is opened, and the second pipeline is conducted. Utilize nitrogen gas to carry out the voltage-sharing when switching on first pipeline, avoided blast furnace gas's use, effectively avoided the blast furnace gas in the distribution in-process stove to get into the material distributing tank when switching on the second pipeline, and then caused the pollution to the atmosphere when having avoided the voltage-sharing to diffuse.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.