Fluidized carbon powder conveying system

Abstract

The utility model relates to a fluidized carbon powder conveying system, which comprises a conveying mechanism, the conveying mechanism comprises a fluidization bin, a first pipeline, a second pipeline and a third pipeline, the first pipeline, the second pipeline and the third pipeline are communicated in sequence, the second pipeline is a hose, and an input port of the first pipeline is communicated with an output port of the fluidization bin; the wear-resisting mechanism comprises a first elbow and a second elbow, the two ends of the second pipeline are communicated with the first pipeline and the third pipeline through the first elbow and the second elbow respectively, and the first elbow and the second elbow are communicated with pressurizing pipes along the radial outer edges respectively; and the electric arc furnace is arranged at the output end of the third pipeline. Through the arrangement, the pressure loss of a transmission system is reduced, so that carbon powder blockage accidents are reduced, the service life of the elbow is prolonged, and the carbon powder spraying operation rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric arc furnace system field especially is a kind of fluidized carbon powder transmission system. BACKGROUND

[0002] In the electric arc furnace all scrap steel or high scrap steel ratio smelting process, according to energy input proportion, furnace energy is mainly electric energy, physical heat and chemical heat of steel material, combustion heat of burner, chemical heat of carbon powder spraying and the like.Electric energy accounts for 50%~80% of total energy input, and foam slag can shield electric arc, reduce the radiation loss of electric arc, thus, full-process foam slag smelting technology is the key to improve electric arc furnace electric energy energy utilization rate.The key to making foam slag is CO gas bubble produced by carbon-oxygen reaction of slag with certain component characteristics and CO gas bubble.

[0003] In the process of inputting carbon powder in traditional electric arc furnace, due to the adhesion of carbon powder, solid carbon powder not only increases the momentum of gas transmission, but also improves the impact and friction on the pipe wall.The impact and friction of high-pressure gas flow and carbon powder can cause physical damage to the pipeline.Especially at the elbow and joint, after the fluidized carbon powder passes through the elbow, it is easy to cause the gas pressure to decrease, reduce the service life of the elbow, and the large particle carbon powder cannot be fluidized, causing the carbon powder to form a blockage near the elbow, and even the pipeline breaks. SUMMARY

[0004] Therefore, the utility model wants to overcome the problem that in prior art, at the elbow and joint, after the fluidized carbon powder passes through the elbow, it is easy to cause the gas pressure to decrease, the large particle carbon powder cannot be fluidized, causing the carbon powder to form a blockage near the elbow, and even the pipeline breaks, so as to provide a fluidized carbon powder transmission system.

[0005] To solve the above technical problems, the utility model provides a kind of fluidized carbon powder transmission system, comprising:

[0006] Conveying mechanism, it includes: fluidized bin, first pipeline, second pipeline and third pipeline, the first pipeline, second pipeline and third pipeline are sequentially communicated, the second pipeline is flexible pipe, and the input port of the first pipeline and the output port of the fluidized bin are communicated;

[0007] Wear-resistant mechanism, it includes first elbow and second elbow, and the two ends of the second pipeline are communicated with the first pipeline and the third pipeline respectively through the first elbow and the second elbow, the outer edge of the first elbow and the second elbow along radial direction is respectively communicated with booster pipe, and the tangent line of the connection place of the first elbow or the second elbow and booster pipe and the axis of booster pipe has included angle;

[0008] An arc furnace is arranged at an output end of the third pipeline.

[0009] In an embodiment of the present application, the output port of the fluidizing bin is provided with a valve assembly, which comprises an automatic valve and a manual valve.

[0010] In an embodiment of the present application, the first pipeline and the third pipeline are respectively connected with a first pressure gauge and a second pressure gauge.

[0011] In an embodiment of the present application, the output port of the third pipeline is communicated with a carbon powder gun, which is arranged on the wall of the arc furnace.

[0012] In an embodiment of the present application, the first elbow and the second elbow are respectively provided with a plurality of booster pipes.

[0013] In an embodiment of the present application, the input port of the booster pipe is communicated with a booster pump, the first elbow and the second elbow have arc-shaped channels, and the output port of the booster pipe is communicated with the arc-shaped channel.

[0014] In an embodiment of the present application, the first elbow and the second elbow are respectively communicated with an inlet booster pipe, an intermediate booster pipe and an outlet booster pipe.

[0015] In an embodiment of the present application, the number of the booster pumps is plural, and the corresponding inlet booster pipe, intermediate booster pipe and outlet booster pipe of the first elbow and the second elbow are connected with the same booster pump.

[0016] In an embodiment of the present application, the first elbow and the second elbow are both 90° elbows, and the tangent line at the connection between the first elbow or the second elbow and the booster pipe and the axis of the booster pipe are any one or more of 10°, 20° or 30°.

[0017] In an embodiment of the present application, the first elbow and the second elbow are respectively provided with a thickening portion along the radial outer edge, and the inlet booster pipe, the intermediate booster pipe and the outlet booster pipe are all communicated through the thickening portion and the arc-shaped channel.

[0018] The above technical solution of the present application has the following advantages compared with the prior art:

[0019] The utility model discloses a fluidized carbon powder transmission system, through fluidized bin output fluidized carbon powder, the carbon powder of waiting for conveying passes through first pipeline, second pipeline and third pipeline in proper order, and the first pipeline and second pipeline between, second pipeline and third pipeline between are connected through first bend and second bend respectively, and the tangent line of bend connecting place of booster pipe has the angle with the axis of booster pipe, and the gas film is formed to the booster gas that sprays through booster pipe, and the fluidized carbon powder of high -speed conveying in bend is changed in partial direction, avoids direct impact pipe wall, reduces the impact and wear and tear of carbon powder to pipe wall, reduces the pressure loss of transmission system through the adjustment booster gas flow, thereby realizes the purpose of reducing carbon powder blockage accident, improves the life of bend and the operation rate of spraying carbon powder. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further detailed, wherein

[0021] Fig. 1 It is the structure schematic drawing of transmission system of the utility model;

[0022] Fig. 2 It is the position schematic drawing of bend and booster pipe of the utility model.

[0023] Description of the drawings reference sign: 101, fluidized bin;102, manual valve;103, automatic valve;104, first pipeline;105, first pressure gauge;106, first bend;107, first booster pump;108, second booster pump;109, third booster pump;110, second pipeline;111, second bend;112, third pipeline;113, second pressure gauge;114, carbon powder gun;115, electric arc furnace;201, bend body;202, import booster pipe;203, intermediate booster pipe;204, export booster pipe;205, thickening portion. PREFERRED EMBODIMENT

[0024] The utility model is further explained in connection with the drawings and specific embodiment, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model. EMBODIMENT

[0025] Referring to Figs. 1-2 The utility model discloses a fluidized carbon powder transmission system, comprising:

[0026] The conveying mechanism comprises a fluidizing bin 101, a first pipe 104, a second pipe 110 and a third pipe 112, the first pipe 104, the second pipe 110 and the third pipe 112 are sequentially connected in communication, the second pipe 110 is a hose, and the input port of the first pipe 104 and the output port of the fluidizing bin 101 are connected in communication;

[0027] The wear-resistant mechanism comprises a first elbow 106 and a second elbow 111, the two ends of the second pipe 110 are connected in communication with the first pipe 104 and the third pipe 112 through the first elbow 106 and the second elbow 111 respectively, the first elbow 106 and the second elbow 111 are respectively connected with a booster pipe along the outer edge in the radial direction, and the tangent line at the connection position between the first elbow 106 or the second elbow 111 and the booster pipe and the axis of the booster pipe have an included angle;

[0028] An electric arc furnace 115 is arranged at the output end of the third pipe 112.

[0029] The fluidized carbon powder conveying system disclosed by the utility model outputs fluidized carbon powder through the fluidizing bin 101, the carbon powder to be conveyed passes through the first pipe 104, the second pipe 110 and the third pipe 112 in sequence, the first pipe 104 and the second pipe 110 are connected through the first elbow 106 and the second elbow 111 respectively, the tangent line at the connection position between the booster pipe and the elbow and the axis of the booster pipe have an included angle, the booster gas sprayed through the booster pipe forms a gas film, the direction of the fluidized carbon powder conveyed at high speed in the elbow is locally changed, direct impact on the pipe wall is avoided, the impact and wear of the carbon powder on the pipe wall are reduced, the pressure loss of the conveying system is reduced by adjusting the flow of the booster gas, so that the purpose of reducing the carbon powder blockage accident and improving the service life of the pipe and the operation rate of the carbon powder spraying is achieved.

[0030] The tangent line at the connection position between the first elbow 106 or the second elbow 111 and the booster pipe and the axis of the booster pipe have an included angle, the included angle is an acute angle, the flow directions of the booster gas and the carbon powder sprayed by the booster pipe are opposite, the flow speed of the carbon powder is not reduced too fast, and the turbulent flow in the elbow is avoided.

[0031] The output port of the fluidizing bin 101 is provided with a valve assembly, the valve assembly comprises an automatic valve 103 and a manual valve 102, the automatic valve 103 works according to the instruction of a control system. The control system determines the required carbon powder flow according to a preset control algorithm by monitoring the related parameters in the electric arc furnace 115, adjusts the opening degree of the valve, the manual valve 102 is arranged upstream of the automatic valve 103, the automatic valve 103 can be overhauled by closing the manual valve 102, and the safety can be ensured by controlling the opening and closing of the flow passage through the manual valve 102 when the automatic valve 103 is damaged.

[0032] The first pipe 104 and the third pipe 112 are respectively connected with a first pressure gauge 105 and a second pressure gauge 113, which are used to monitor the pressure in the first pipe 104 and the third pipe 112 respectively. Through the pressure monitoring of the first pipe 104 and the third pipe 112, the pressure of the carbon powder at different stages of the conveying process can be obtained.

[0033] The output of the third pipe 112 is communicated with a carbon powder gun 114, which is arranged on the wall of the electric arc furnace 115. The carbon powder gun 114 can make the sprayed carbon powder reach the reaction area in the electric arc furnace 115, and the carbon powder can be uniformly sprayed and distributed.

[0034] The first elbow 106 and the second elbow 111 are respectively provided with a plurality of booster pipes, which work together to inject gas into the elbow from different directions, so as to more comprehensively cover the inner wall of the elbow.

[0035] The input of the booster pipe is communicated with a booster pump, and the first elbow 106 and the second elbow 111 have arc-shaped channels. The output of the booster pipe is communicated with the arc-shaped channel. In the arc-shaped channel of the first elbow 106 and the second elbow 111, the carbon powder flows in from the first pipe 104 or flows out from the second pipe 110. Due to the pressure environment formed by the gas injected by the booster pipe, the carbon powder particles are pushed away by the gas when they are close to the inner wall, so that the collision and friction between the carbon powder particles and the inner wall of the arc-shaped channel are greatly reduced, thereby protecting the inner wall of the elbow from being worn.

[0036] Referring to Fig. 2 As shown, the first elbow 106 and the second elbow 111 have the same structure and are both elbow bodies 201. The first elbow 106 and the second elbow 111 are respectively communicated with an inlet booster pipe 202, a middle booster pipe 203 and an outlet booster pipe 204, which comprehensively cope with the change of the flow characteristics of the carbon powder at different positions in the elbow.

[0037] The number of the booster pumps is multiple. The corresponding inlet booster pipe 202, middle booster pipe 203 and outlet booster pipe 204 of the first elbow 106 and the second elbow 111 are connected with the same booster pump. The inlet booster pipe 202 is connected with the first booster pump 107, the middle booster pipe 203 is connected with the second booster pump 108, and the outlet booster pipe 204 is connected with the third booster pump 109.

[0038] The first elbow 106 and the second elbow 111 are both 90° elbows, and through the two 90° elbows, the first pipe 104 and the third pipe 112 can be configured as horizontal pipes, and the first pipe 104 and the third pipe 112 have a height difference, and the first pipe 104 and the third pipe 112 are connected with the second pipe 110 through the first elbow 106 and the second elbow 111 respectively, and the second pipe 110 is in the initial state along the vertical direction, and when the electric arc furnace 115 is tilted, the second pipe 110 is a hose that can be deformed, so that the angle of the third pipe 112 adaptively changes.

[0039] Referring to Fig. 2 As shown, the first elbow 106 and the second elbow 111 are provided with thickened portions 205 along the radial outer edges, and the inlet booster pipe 202, the intermediate booster pipe 203 and the outlet booster pipe 204 all pass through the thickened portions 205 and the arc-shaped passages to communicate, when the booster pump provides gas to the inlet booster pipe 202, the gas passes through the thickened portions 205 into the arc-shaped passages through the inlet booster pipe 202, and the thickened portions 205 provide a stable connection structure for the inlet booster pipe 202, and the gas can be stably injected into the arc-shaped passages, and the thickened portions 205 not only enhance the structural strength of the elbow, but also provide reliable sealing and stable support for the connection of the booster pipe and the arc-shaped passage. At the same time, since the flow direction of the carbon powder changes in the elbow, a large impact force and friction force will be generated on the inner wall of the elbow, especially in the area of the thickened portions 205 through which the booster pipe passes. The more wear-resistant thickened portions 205 can effectively reduce the structural damage caused by wear and tear, and prolong the service life of the elbow.

[0040] Obviously, the above embodiments are only examples for clearly illustrating, and are not intended to limit the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A fluidized toner transport system characterized by, The application relates to a carbon powder conveying device. The conveying device comprises a fluidizing bin, a first pipe, a second pipe and a third pipe, the first pipe, the second pipe and the third pipe are sequentially connected, the second pipe is a hose, and the input port of the first pipe and the output port of the fluidizing bin are connected. The wear-resistant mechanism comprises a first elbow and a second elbow, two ends of the second pipe are connected with the first pipe and the third pipe through the first elbow and the second elbow respectively, the first elbow and the second elbow are respectively connected with booster pipes along the outer edges in the radial direction, and the tangent line at the connection between the first elbow or the second elbow and the booster pipe and the axis of the booster pipe have an included angle. An electric arc furnace is arranged at the output end of the third pipe.

2. A fluidized carbon powder delivery system as in claim 1 wherein: The output port of the fluidizing bin is provided with a valve assembly, and the valve assembly comprises an automatic valve and a manual valve.

3. A fluidized toner delivery system as in claim 1 wherein: The first pipe and the third pipe are respectively connected with a first pressure gauge and a second pressure gauge.

4. A fluidized toner delivery system as claimed in claim 1 or 3, wherein: The output port of the third pipe is connected with a carbon powder gun, and the carbon powder gun is arranged on the wall of the electric arc furnace.

5. A fluidized carbon powder delivery system as in claim 1 wherein: The first elbow and the second elbow are respectively provided with a plurality of booster pipes.

6. A fluidized carbon powder delivery system as in claim 5, wherein: The input port of the booster pipe is connected with a booster pump, the first elbow and the second elbow have arc-shaped channels, and the output port of the booster pipe is connected with the arc-shaped channels.

7. A fluidized carbon powder delivery system as in claim 1 wherein: The first elbow and the second elbow are respectively connected with an inlet booster pipe, an intermediate booster pipe and an outlet booster pipe.

8. A fluidized carbon powder delivery system as in claim 6, wherein: The number of the booster pumps is multiple, and the corresponding inlet booster pipe, intermediate booster pipe and outlet booster pipe on the first elbow and the second elbow are connected with the same booster pump.

9. A fluidized carbon powder delivery system as in claim 1 wherein: The first elbow and the second elbow are both 90-degree elbows, and the tangent line at the connection between the first elbow or the second elbow and the booster pipe and the axis of the booster pipe are any one or more of 10 degrees, 20 degrees or 30 degrees.

10. A fluidized carbon powder delivery system as in claim 8, wherein: The outer edges in the radial direction of the first elbow and the second elbow are provided with thickened portions, and the inlet booster pipe, the intermediate booster pipe and the outlet booster pipe all pass through the thickened portions and the arc-shaped channels to be connected.

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