CN217651255U

CN217651255U - Quick heating device in stove

Info

Publication number: CN217651255U
Application number: CN202221303280.XU
Authority: CN
Inventors: 廖宇; 王楠; 黄晓春; 何刚; 李斌; 虞鑫; 吴健
Original assignee: Wugang Group Kunming Iron and Steel Co Ltd
Current assignee: Wugang Group Kunming Iron and Steel Co Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-10-25
Anticipated expiration: 2032-05-27

Abstract

The utility model discloses a rapid heating device in a furnace, which comprises a drill bit section, a pipe body, a compressed air channel and an oxygen channel arranged in the pipe body, wherein the tail end is detachably assembled and communicated with a gas supply section; a compressed air conveying pipeline is formed between the outer pipe and the inner pipe and used for cooling the pipe wall of the inner pipe, and the inner pipe is used for conveying oxygen and is used for supporting combustion. The flow and pressure regulation of air and oxygen can be realized through the gas distribution box, and one set of thermocouple is respectively installed on the compressed air delivery pipe and the oxygen delivery pipe and is used for measuring the temperature in the pipes. The impact rapping can be realized by connecting one side of the device with the drill rod shank with the tapping machine. This device couples together through the screw thread two parts front and back and forms a whole, and inside air supply coupling part seals through the sealing washer, and above-mentioned structure not only can guarantee the device's work efficiency, also convenient to detach and change reduce labourer's working strength. The blow-in time is reduced, the working efficiency and the safety are improved, and the economic benefit of enterprises is improved.

Description

Quick heating device in stove

Technical Field

The utility model relates to a temperature control technical equipment field in the blast furnace specifically is a quick heating device in stove.

Background

The heating of the furnace hearth is the primary work before the blast furnace is opened and the blast furnace is stopped to overhaul and open, namely, the iron notch and the tuyere of the furnace hearth are burnt in the shortest time, so that the molten liquid iron slag in the tuyere area can smoothly flow into the iron notch area after air supply and finally flow out of the iron notch area. What use at present is that the method of oxygen lance is buried to taphole carries out the blow-in because can't carry out accurate regulation to oxygen content and pressure, at the blow-in-process, the oxygen blowing effect can only rely on experience judgement entirely, if operator's operation is not normal or time, oxygen content control are improper, can lead to the time extension of blow-in, and the crucible heating is not good, appears easily that the slag iron temperature is low, does not flow, causes huge difficulty for the tapping.

The slag iron in the furnace hearth is condensed when the blast furnace is stopped or cooled for a long time, newly formed slag iron cannot enter the furnace hearth after re-air, the slag iron accumulated in the tuyere raceway is easy to burn out a small sleeve in the tuyere, and the slag iron temperature is low during tapping and the workload in front of the furnace is very large. In the process of blowing in the blast furnace, the tap hole oxygen-burying gun is utilized to blow in the furnace, so that the tap hole and the tuyere are ensured to be communicated, newly-formed slag with poor fluidity in the initial stage of blowing in the furnace and residual iron slag in the process of blowing out the furnace are smoothly discharged until the heat of a furnace hearth is balanced, and the iron slag is smoothly discharged in front of the furnace. At present, oxygen lance devices which use a vent pipe to insert into a furnace and inject oxygen exist, but the oxygen lance devices also have the problems of difficult use, such as easy burning loss or difficult taking out of the oxygen lance, high loss cost and the like.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the prior art, the inventor designs the rapid heating device in the furnace, aiming at providing the rapid heating device in the furnace which can accurately control the oxygen content and the pressure, can measure and monitor the temperature and the condition inside the oxygen lance in real time, shortens the blow-in time and avoids equipment accidents. Specifically, the utility model discloses a realize like this:

a rapid heating apparatus in a furnace, comprising: the end of the drill bit section is in a drill bit shape and is provided with an air outlet hole, and the drill bit section can be detachably arranged at the end of the pipe body; the end of the pipe body is arranged with the drill bit section, a compressed air channel and an oxygen channel are arranged in the pipe body, and the tail end of the pipe body is detachably combined and communicated with the air supply section; the air supply section can be in butt joint with the pipe body and can respectively provide compressed air and compressed oxygen for the compressed air channel and the oxygen channel through an external air pipe, the tail end of the air supply section can be arranged on the tapping machine, and a temperature sensor is arranged in the air supply section to acquire temperature data in the compressed air channel and the oxygen channel; and the gas distribution box is connected with gas source equipment, supplies gas to the compressed air channel and the oxygen channel through gas pipes and can adjust the flow rate of gas flow or close the gas supply.

Furthermore, the pipe body is divided into an inner pipeline and an outer sleeve, the outer sleeve and the diameter of the inner pipeline form an interlayer inner cavity, the interlayer inner cavity is used for introducing compressed air, the inner pipeline is used for introducing oxygen, and the introduced compressed air and the introduced oxygen can be conveyed into the furnace from the drill bit section.

Furthermore, the air supply section comprises an air supply pipe and a tail rod, the air supply pipe comprises an inner pipeline and an outer sleeve, a butt joint outer pipe is arranged at the end head, the butt joint outer pipe is used for butt joint installation with the tail end of the pipe body, after butt joint installation, the air supply pipe is connected with the inner pipeline and the outer pipeline of the pipe body, and the air supply pipe is provided with a compressed air quick connector and an oxygen quick connector which are respectively communicated with the interlayer inner cavity and the inner pipeline.

Further, the temperature sensor of the air feed pipe includes: the oxygen thermocouple joint and the compressed air thermocouple joint which are arranged outside the air supply pipe are respectively connected with the thermocouples arranged in the inner pipeline and the interlayer inner cavity.

Furthermore, the tail end of the tail rod is a drill bit tail which can be arranged on the tapping machine to drive the drill bit section to rotate and shake the furnace door.

Further, the distribution box comprises a compressed oxygen control pipeline and a compressed air control pipeline, and comprises an air inlet connector, an air outlet connector, a compressed air regulating valve, a compressed oxygen regulating valve and a compressed oxygen pressure gauge, wherein the air outlet connector is respectively connected to the oxygen quick connector and the compressed air quick connector through air pipes.

Furthermore, a three-way valve is arranged between the compressed oxygen control pipeline and the compressed air control pipeline for connection, wherein an air pipe from the compressed oxygen control pipeline to the compressed air control pipeline is a one-way pipeline, and the compressed oxygen can be controlled to enter the compressed air control pipeline through the three-way valve.

Furthermore, a section of bent pipe is arranged between the air inlet joint and the three-way valve of the compressed oxygen control pipeline.

The utility model discloses a theory of operation and beneficial effect introduce: the drill bit section is mainly used for further entering a furnace conveying pipe in the vibrating process, the pipe body is the longest middle section part and is mainly used for conveying air and generally contacts with a furnace body, oxygen is input into the furnace from the inner pipeline and is conveyed into the furnace from the drill bit section for supporting combustion to ensure the temperature in the furnace to be kept, the interlayer inner cavity of the appearance sleeve is used for injecting compressed air, the temperature of the whole pipe body is reduced, the service life is prolonged, the tail end of the pipe body is connected with the air supply section, the air supply section can be externally connected with an air pipe and can be provided with an opening machine for vibrating and rotating the conveying pipe, the drill bit and the pipe body are detachably replaced after being lost, the drill bit can be replaced after being lost, the pipe body can be replaced only after being damaged, the consumption of consumables is saved as much as possible, a galvanic couple can acquire the temperature in the pipeline and feed back, so as to realize real-time temperature monitoring inside the oxygen lance and reduce the damage as much as possible; the structure of the gas distribution box can realize the monitoring and control of the oxygen flow, can accurately regulate the flow velocity and the flow of the compressed air and the oxygen, and realize the accurate operation and control of combustion supporting in the furnace so as to improve the blow-in efficiency; when the outer sleeve is damaged, the gun can be withdrawn and blocked, the gun can not be withdrawn smoothly, and if necessary, oxygen can be injected into the interlayer cavity through the operation of the three-way valve to accelerate the combustion of the outer sleeve so as to completely burn the outer sleeve and quickly complete the gun withdrawing operation of the inner pipe. The device of the utility model solves the problem that the oxygen pressure and the flow of the oxygen lance can not be accurately adjusted in the blow-in process of the oxygen lance, increases the rapping mechanism on the original basis, improves the blow-in efficiency, and reduces the burning loss rate of the oxygen lance by matching with the outer sleeve to form an air cooling device; the blow-in time is reduced on the whole, the working efficiency and the safety are improved, and the economic benefit of enterprises is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the rapid heating device in the furnace of the present invention;

FIG. 2 is a partially enlarged view of a drill bit section of the rapid heating device in a furnace according to the present invention;

FIG. 3 is a partially enlarged schematic view of the gas supply section of the rapid heating device in the furnace according to the present invention;

FIG. 4 is a schematic view of an opening structure used in the present invention;

FIG. 5 is a schematic view of the gas distribution box of the rapid heating device in the furnace of the present invention;

FIG. 6 is a schematic view showing the usage state of the rapid heating device in the furnace according to the present invention;

wherein: 1-drill bit section, 2-pipe body, 3-air supply section, 4-tapping machine, 5-gas distribution box, 6-inner pipeline, 7-outer sleeve, 8-interlayer inner cavity, 9-butt joint outer pipe, 10-compressed air quick joint, 11-oxygen quick joint, 12-oxygen thermocouple joint, 13-compressed air thermocouple joint, 14-drill rod tail, 15-compressed oxygen control pipeline, 16-compressed air control pipeline, 17-air inlet joint, 18-compressed air regulating valve, 19-compressed oxygen regulating valve, 20-compressed oxygen pressure gauge, 21-three-way valve, 22-one-way pipeline, 23-elbow.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Example 1: when the in-furnace rapid heating device is used, firstly, the drill bit section 1, the pipe body 2 and the air supply section 3 are assembled, the tail end of the tail rod is a drill bit tail 14 and can be installed on the tapping machine 4 to drive the drill bit section 1 to shake the furnace door, the air supply section 3 and the tapping machine 4 are installed, the tapping machine 4 is operated to align the oxygen lance to a position about 2m away from the furnace door, corresponding valves on the air supply integrated block are sequentially opened in sequence, the tapping machine 4 is operated to impact and shake the oxygen lance, and the oxygen lance starts to work. The pipe body 2 is divided into an inner pipeline 6 and an outer sleeve 7, the outer sleeve 7 and the inner pipeline 6 are in diameter to form an interlayer inner cavity 8, the interlayer inner cavity 8 is used for introducing compressed air, the inner pipeline 6 is used for introducing oxygen, and the introduced compressed air and the oxygen can be fed into the furnace from the drill bit section 1. In the vibrating and burning process, the conveyed compressed air can effectively cool the pipe wall of the inner pipeline 6, and oxygen is conveyed in the inner pipeline 6 to intensify burning; the air supply section 3 comprises an air supply pipe and a tail rod, the air supply pipe comprises an inner pipeline 6 and an outer sleeve 7, a butt joint outer pipe 9 is arranged at the end, the butt joint outer pipe 9 is used for butt joint installation with the tail end of the pipe body 2, after butt joint installation, the air supply pipe is connected with the inner pipeline 6 and the outer pipeline of the pipe body 2, and a compressed air quick connector 10 and an oxygen quick connector 11 are arranged on the air supply pipe and are respectively communicated with the interlayer inner cavity 8 and the inner pipeline 6. When in use, the quick connector is used for carrying out quick connection and installation with an output air pipe connected with the air distribution box 5;

the temperature sensor of the air feed pipe includes: an oxygen thermocouple junction 12 and a compressed air thermocouple junction 13, which are disposed outside the air feed pipe, are connected to thermocouples disposed in the inner pipe 6 and the interlayer inner chamber 8, respectively. The air distribution box 5 comprises a compressed oxygen control pipeline 15 and a compressed air control pipeline 16, and comprises an air inlet connector 17, an air outlet connector, a compressed air regulating valve 18, a compressed oxygen regulating valve 19 and a compressed oxygen pressure gauge 20, wherein the air outlet connector is respectively connected to the oxygen quick coupler 11 and the compressed air quick coupler 10 through air pipes. The adjustment of the air supply quantity can be realized by observing the temperature data in the pipeline and matching with the operation of the air distribution box 5 in the blow-in process, and the blow-in control with higher precision can be carried out through flow control; the temperature change can also be observed in the gun withdrawing process, so that the burning loss of the outer pipe is prevented; the device of this embodiment's between the multiunit section of closing through threaded connection mode with around two parts couple together and form a whole, inside air supply coupling part seals through the sealing washer, above-mentioned structure not only can guarantee the device's work efficiency, also convenient to detach and change reduce labourer's intensity of work.

Furthermore, a three-way valve 21 is arranged between the compressed oxygen control pipeline 15 and the compressed air control pipeline 16 for connection, wherein an air pipe from the compressed oxygen control pipeline 15 to the compressed air control pipeline 16 is a one-way pipe 22, and the three-way valve 21 can control the compressed oxygen to enter the compressed air control pipeline 16. The one-way pipeline 22 is used for preventing compressed air from entering an oxygen pipeline, and the design of the three-way structure is mainly that after the outer pipeline is burnt, the oxygen cannot smoothly and conveniently retreat from the oxygen lance, and then the oxygen can be injected into the interlayer cavity through the operation of the three-way valve 21, so that the burning of the outer pipe is accelerated, and the oxygen lance can be quickly and conveniently pulled out. The compressed oxygen control line 15 is further provided with a bent pipe 23 between the air inlet joint 17 and the three-way valve 21. Because the air supply of oxygen needs many uses, leads to the air current in the trachea to fluctuate greatly, and the effect of return bend 23 can reduce the air current and fluctuate, further ensures accurate regulation tolerance size, reaches the effect of invariable air supply.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modifications, equivalents, improvements and the like which are made without departing from the spirit and scope of the present invention should be considered within the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A rapid heating device in a furnace is characterized by comprising:

the end of the drill bit section (1) is in a drill bit shape and is provided with an air outlet hole, and the drill bit section can be detachably arranged at the end of the pipe body (2);

the end of the tube body (2) is arranged with the drill bit section (1), a compressed air channel and an oxygen channel are arranged in the tube body (2), and the tail end of the tube body is detachably assembled and communicated with the air supply section (3);

the air supply section (3) can be in butt joint with the pipe body (2) and can respectively provide compressed air and compressed oxygen for the compressed air channel and the oxygen channel through an external air pipe, the tail end of the air supply section can be arranged on the tapping machine (4), and a temperature sensor is arranged in the air supply section to acquire temperature data in the compressed air channel and the oxygen channel;

and the gas distribution box (5) is connected with gas source equipment, supplies gas to the compressed air channel and the oxygen channel through gas pipes, and can adjust the flow rate of gas flow or close the gas supply.

2. The rapid heating device in furnace according to claim 1, characterized in that the tube body (2) is divided into an inner tube (6) and an outer tube (7), the outer tube (7) and the inner tube (6) have a diameter to form an interlayer inner cavity (8), the interlayer inner cavity (8) is used for introducing compressed air, the inner tube (6) is used for introducing oxygen, and the compressed air and oxygen can be fed into the furnace from the drill bit section (1).

3. The rapid heating device in furnace according to claim 2, characterized in that the gas supply section (3) comprises a gas supply pipe and a tail rod, the gas supply pipe comprises an inner pipeline (6) and an outer sleeve (7), and a butt joint outer pipe (9) is arranged at the end, the butt joint outer pipe (9) is used for butt joint installation with the end of the tube body (2), after butt joint installation, the gas supply pipe and the inner pipeline (6) and the outer pipeline of the tube body (2) are connected and communicated, and the gas supply pipe is provided with a compressed air quick connector (10) and an oxygen quick connector (11) which are respectively communicated with the interlayer inner cavity (8) and the inner pipeline (6).

4. The rapid heating apparatus in a furnace according to claim 3, wherein the temperature sensor of the blast pipe comprises: an oxygen thermocouple joint (12) and a compressed air thermocouple joint (13) which are arranged outside the air feed pipe are respectively connected with thermocouples arranged in the inner pipeline (6) and the interlayer inner cavity (8).

5. The rapid heating device in furnace according to claim 3, characterized in that the tail end of the tail rod is a drill bit (14) which can be installed on the tapping machine (4) to drive the drill bit section (1) to rotate and vibrate the furnace door.

6. A rapid heating device in furnace according to claim 3 characterized in that the distribution box (5) comprises compressed oxygen control pipeline (15), compressed air control pipeline (16) comprising air inlet joint (17), air outlet joint, compressed air adjusting valve (18), compressed oxygen adjusting valve (19) and compressed oxygen pressure gauge (20), the air outlet joint is connected to oxygen fast joint (11) and compressed air fast joint (10) through air pipe.

7. The rapid heating device in furnace according to claim 6, wherein a three-way valve (21) is further provided between the compressed oxygen control pipeline (15) and the compressed air control pipeline (16), wherein the air pipe from the compressed oxygen control pipeline (15) to the compressed air control pipeline (16) is a one-way pipe (22), and the three-way valve (21) can control the compressed oxygen to enter the compressed air control pipeline (16).

8. The rapid heating apparatus according to claim 7, wherein the compressed oxygen control line (15) further comprises a bent pipe (23) between the inlet joint (17) and the three-way valve (21).