CN219385270U

CN219385270U - Exhaust device and hood-type annealing furnace

Info

Publication number: CN219385270U
Application number: CN202320545746.5U
Authority: CN
Inventors: 刘卫平; 谭卫锋; 蒋东; 蒋鑫; 吴健; 尹智军; 唐会龙; 周小溪
Original assignee: Hunan Valin Lianyuan Iron & Steel Co Ltd; Lysteel Co Ltd
Current assignee: Hunan Valin Lianyuan Iron & Steel Co Ltd; Lysteel Co Ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-07-21
Anticipated expiration: 2033-03-20

Abstract

The utility model relates to an exhaust device which comprises an exhaust pipeline, a regulating valve, a first control valve, a second control valve, an air inlet assembly and a waste discharge assembly. When the accumulated impurities need to be cleaned, the first control valve is closed, the regulating valve is opened, the air inlet assembly and the exhaust pipeline are conducted, inert gas input by the air inlet assembly enters the stove table after passing through the regulating valve, and the inert gas can wash the regulating valve to wash away the impurities accumulated on the regulating valve. Then the regulating valve is closed, then the first control valve is opened, the second control valve is closed, the waste discharge assembly and the exhaust pipeline are simultaneously conducted, and inert gas passes through the first control valve and the waste discharge assembly to flush impurities in the exhaust pipeline and discharge the impurities from the waste discharge assembly. Therefore, the exhaust pipeline and the regulating valve can be cleaned in the operation process, the furnace does not need to be stopped, and the exhaust pipeline does not need to be manually cleaned after being detached, so that the interruption of production is avoided, and the production efficiency is improved. The utility model also relates to a hood-type annealing furnace.

Description

Exhaust device and hood-type annealing furnace

Technical Field

The utility model relates to the technical field of annealing furnace pipe network cleaning, in particular to an exhaust device and a hood-type annealing furnace.

Background

In the annealing process of the cold-rolled hard coil in the hood-type annealing furnace, rolling oil adsorbed on the surface of the steel coil is separated out and gasified in a high-temperature hydrogen environment, reduced metal particles are mixed with the rolling oil to be replaced by gas, and the temperature of the metal particles entering a pipeline after the steel coil is discharged from the furnace is rapidly reduced, so that the gasified rolling oil is rapidly solidified and mixed with the metal particles to form crystal grains, the crystal grains are gathered together to cause the pipe network to be blocked, the gas flow in the pipe network is reduced, the gas replacement efficiency is influenced, and even the gas replacement failure is caused.

At present, when a pipe network is blocked, the gas replacement efficiency is low or the gas replacement is failed, the nitrogen is used for replacing the hydrogen in the furnace and the pipe network at first so as to ensure the construction safety, and then the pipe network is disassembled and cleaned manually. In the manual cleaning process, the furnace needs to be shut down, and the production efficiency is affected.

Disclosure of Invention

Based on this, it is necessary to provide an exhaust device and a hood-type annealing furnace which can clean the pipe network on line and ensure the production efficiency, aiming at the problem that the existing manual cleaning of the pipe network of the annealing furnace leads to low production efficiency.

An exhaust apparatus, comprising:

the exhaust pipeline is connected with the stove table;

the regulating valve, the first control valve and the second control valve are sequentially arranged on the exhaust pipeline at intervals, and the first control valve is positioned on one side, far away from the stove table, of the regulating valve;

the air inlet assembly is connected with the exhaust pipeline and is connected between the regulating valve and the first control valve; and

The waste discharge assembly is connected with the exhaust pipeline and is connected between the first control valve and the second control valve;

the exhaust pipeline is characterized in that the air inlet assembly and the exhaust assembly can be connected and disconnected with the exhaust pipeline, and when the air inlet assembly is connected with the exhaust pipeline, the air inlet assembly can input inert gas into the exhaust pipeline, and when the exhaust assembly is connected with the exhaust pipeline, the exhaust assembly can exhaust impurities in the exhaust pipeline.

Through setting up foretell exhaust apparatus, when the impurity of needs clearance gathering, close first control valve, open the governing valve to switch on inlet module and exhaust pipe, inlet module input inert gas gets into the stove top behind the governing valve, inert gas can wash the governing valve, will gather the impurity at the governing valve. Then the regulating valve is closed, then the first control valve is opened, the second control valve is closed, the waste discharge assembly and the exhaust pipeline are simultaneously conducted, and inert gas passes through the first control valve and the waste discharge assembly to flush impurities in the exhaust pipeline and discharge the impurities from the waste discharge assembly. Therefore, the exhaust pipeline and the regulating valve can be cleaned in the operation process, the furnace does not need to be stopped, and the exhaust pipeline does not need to be manually cleaned after being detached, so that the interruption of production is avoided, and the production efficiency is improved.

In one embodiment, the exhaust pipeline comprises a first pipe section, a second pipe section and a third pipe section, wherein the first pipe section is connected between the furnace platform and the regulating valve, the second pipe section is connected between the regulating valve and the first control valve, the air inlet component is connected with the second pipe section, the third pipe section is connected between the first control valve and the second control valve, and the waste discharge component is connected with the third pipe section.

In one embodiment, the exhaust conduit further comprises a fourth pipe section connected to the second control valve.

In one embodiment, the air inlet assembly comprises an air source, an air inlet pipe and an air inlet control valve, wherein the air source is used for providing inert gas, the air inlet pipe is connected between the air source and the exhaust pipeline, and the air inlet control valve is arranged on the air inlet pipe.

In one embodiment, the air inlet assembly further comprises a shut-off valve arranged on the air inlet pipe and located on one side of the air inlet control valve away from the exhaust pipeline.

In one embodiment, the exhaust device further comprises a pressure relief assembly, the pressure relief assembly is connected with the furnace platform, and the pressure relief assembly can be conducted when the pressure of the furnace platform is larger than a preset pressure so as to exhaust gas in the furnace platform.

In one embodiment, the pressure relief assembly comprises a pressure relief pipe and a pressure relief valve, one end of the pressure relief pipe is connected with the hearth, and the pressure relief valve is arranged on the pressure relief pipe.

In one embodiment, one end of the pressure relief pipe, which is far away from the hearth, is connected with the exhaust pipeline and is connected between the first control valve and the second control valve.

In one embodiment, the waste assembly comprises a waste pipe and a waste valve, the waste pipe is connected with the exhaust pipeline, and the waste valve is arranged on the waste pipe.

A hood-type annealing furnace comprises a furnace table and the exhaust device.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a hood-type annealing furnace according to an embodiment of the present utility model.

Description of the reference numerals: 1. a hood-type annealing furnace; 10. a stove top; 20. an exhaust device; 211. a first pipe section; 212. a second pipe section; 213. a third pipe section; 214. a fourth pipe section; 221. a regulating valve; 222. a first control valve; 223. a second control valve; 23. an air intake assembly; 231. an air inlet pipe; 232. an intake control valve; 233. a shut-off valve; 24. a waste discharging component; 241. a waste discharge pipe; 242. a waste valve; 25. a pressure relief assembly; 251. a pressure relief tube; 252. a pressure release valve; 30. a gas supply device; 31. a first air supply duct; 32. a second air supply duct; 33. a main pipe; 34. a flow meter; 35. a first air supply valve; 36. and a second air supply valve.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As shown in fig. 1, the present utility model provides a hood-type annealing furnace 1, which includes a hearth 10 and an exhaust device 20, wherein the exhaust device 20 is connected to the hearth 10, and the exhaust device 20 can discharge exhaust gas in the hearth 10.

In some embodiments, the exhaust device 20 includes an exhaust pipe, a regulating valve 221, a first control valve 222 and a second control valve 223, the exhaust pipe is connected with the oven platform 10, the regulating valve 221, the first control valve 222 and the second control valve 223 are sequentially arranged on the exhaust pipe at intervals, the first control valve 222 is located on one side of the regulating valve 221 away from the oven platform 10, the regulating valve 221, the first control valve 222 and the second control valve 223 can control the on-off of the exhaust pipe, and the regulating valve 221 can also regulate the flow of the gas in the exhaust pipe by regulating the opening.

Further, the exhaust device 20 further includes an air intake assembly 23 and a waste discharge assembly 24, the air intake assembly 23 and the waste discharge assembly 24 are connected with the exhaust pipe, the air intake assembly 23 is connected between the adjusting valve 221 and the first control valve 222, and the waste discharge assembly 24 is connected between the first control valve 222 and the second control valve 223.

Wherein, the air inlet component 23 and the waste discharging component 24 can be connected with and disconnected from the exhaust pipeline.

When the air inlet assembly 23 is communicated with the exhaust pipeline, the air inlet assembly 23 can input inert gas into the exhaust pipeline; when the exhaust assembly 24 is in communication with the exhaust conduit, the exhaust assembly 24 is capable of exhausting impurities in the exhaust conduit.

The waste gas in the above embodiment means hydrogen and nitrogen, the impurity means crystal grains accumulated in the pipeline, and the inert gas is preferably nitrogen. During the production process, the air inlet assembly 23, the waste discharge assembly 24 and the exhaust pipe are disconnected, the regulating valve 221, the first control valve 222 and the second control valve 223 are all opened, the waste gas in the oven table 10 is discharged through the exhaust pipe, and during the gas discharging process, impurities are easily accumulated at the positions where the regulating valve 221 and the exhaust pipe are bent, for example, the positions where the waste discharge assembly 24 is connected with the exhaust pipe in fig. 1.

It will be appreciated that when the inlet assembly 23 is disconnected from the exhaust duct, the inlet assembly 23 will not feed inert gas into the exhaust duct; when the exhaust assembly 24 is disconnected from the exhaust pipe, the gas in the exhaust pipe is not discharged from the exhaust assembly 24, but is discharged through the second control valve 223.

By providing the above-mentioned exhaust device 20, when the impurities accumulated at the position of the regulating valve 221 need to be cleaned, the first control valve 222 is closed to confirm that the regulating valve 221 is opened, and the air inlet assembly 23 and the exhaust pipeline are connected, the inert gas input by the air inlet assembly 23 enters the stove table 10 after passing through the regulating valve 221, and the inert gas can flush the regulating valve 221 to flush the impurities accumulated at the regulating valve 221. Next, the regulating valve 221 is closed, then the first control valve 222 is opened, the second control valve 223 is closed, and simultaneously the exhaust assembly 24 and the exhaust pipe are conducted, and the inert gas passes through the first control valve 222 and the exhaust assembly 24 to flush out impurities in the exhaust pipe and discharge the impurities from the exhaust assembly 24. Therefore, the exhaust pipeline and the regulating valve 221 can be cleaned in the operation process, the furnace is not required to be stopped, and the exhaust pipeline is not required to be manually cleaned after being detached, so that the interruption of production is avoided, and the production efficiency is improved.

It should be noted that the cleaning time is not too long, and the cleaning time is usually 15 seconds, so that the short closing of the regulating valve 221 does not affect the production, and the inert gas entering the furnace table 10 does not affect the furnace table 10, so that the cleaning does not cause interruption of the production.

In some embodiments, the hood-type annealing furnace further comprises a gas supply device 30, wherein the gas supply device 30 is connected with the furnace platform 10 and is used for supplying hydrogen and nitrogen into the furnace platform 10.

In practical application, the air supply device 30 includes a first air supply pipe 31, a second air supply pipe 32, a main pipe 33 and a flow meter 34, where the first air supply pipe 31 and the second air supply pipe 32 are connected with the main pipe 33 at the same time, the main pipe 33 is connected with the oven 10, and the flow meter 34 is disposed on the main pipe 33 for detecting the flow rate of the air input to the oven 10 by the main pipe 33.

Specifically, the air supply device 30 further includes a first air supply valve 35 and a second air supply valve 36, the first air supply valve 35 is disposed on the first air supply pipeline 31 to control on-off of the first air supply pipeline 31, and the second air supply valve 36 is disposed on the second air supply pipeline 32 to control on-off of the second air supply pipeline 32.

In some embodiments, the exhaust duct comprises a first pipe section 211, a second pipe section 212 and a third pipe section 213, the first pipe section is connected between the oven table 10 and the regulating valve 221, the second pipe section 212 is connected between the regulating valve 221 and the first control valve 222, the air intake assembly 23 is connected to the second pipe section 212, the third pipe section 213 is connected between the first control valve 222 and the second control valve 223, and the waste discharge assembly 24 is connected to the third pipe section 213.

As shown in fig. 1, waste assembly 24 is connected to third tube segment 213 in a curved position.

In practice, the exhaust pipe further includes a fourth pipe section 214, and the fourth pipe section 214 is connected to the second control valve 223, for discharging the exhaust gas passing through the second control valve 223 to a preset position.

In some embodiments, the air intake assembly 23 includes an air source, an air intake pipe 231 and an air intake control valve 232, the air source is used for providing inert gas, the air intake pipe 231 is connected between the air source and the air exhaust pipeline, the air intake pipe 231 is connected to the second pipe section 212, and the air intake control valve 232 is disposed on the air intake pipe 231 to control on-off of the air intake pipe 231, so as to realize on-off of the air intake assembly 23 and the air exhaust pipeline.

It will be appreciated that the inert gas provided by the gas source is a high pressure gas to ensure that impurities in the exhaust line and the regulator valve 221 are flushed.

In practical application, the air intake assembly 23 further includes a shutoff valve 233, the shutoff valve 233 is disposed on the air intake pipe 231, and the air intake control valve 232 is displaced away from one side of the exhaust pipe, so as to perform manual closing in an emergency, so as to ensure disconnection of the air intake assembly 23 from the exhaust pipe.

In some embodiments, the exhaust component 24 includes an exhaust pipe 241 and an exhaust valve 242, where the exhaust pipe 241 is connected to the exhaust pipe and between the first control valve 222 and the second control valve 223, that is, the exhaust pipe 241 is connected to the third pipe section 213, and the exhaust valve 242 is disposed on the exhaust pipe 241 and used for controlling the on/off of the exhaust pipe 241 so as to connect and disconnect the exhaust component 24 and the exhaust pipe.

In some embodiments, the exhaust device 20 further includes a pressure relief assembly 25, where the pressure relief assembly 25 is connected to the oven 10, and the pressure relief assembly 25 is capable of conducting when the pressure of the oven 10 is greater than a preset pressure, so as to vent the gas in the oven 10 for pressure relief.

When the regulating valve 221 is cleaned, the inert gas flushes the regulating valve 221 and enters the furnace table 10, and if the pressure in the furnace table 10 rises to be greater than the preset pressure, the pressure relief assembly 25 will be connected to the furnace table 10 to relieve the pressure of the furnace table 10.

In practical application, the pressure relief assembly 25 includes a pressure relief tube 251 and a pressure relief valve 252, one end of the pressure relief tube 251 is connected with the oven 10, and the pressure relief valve 252 is disposed on the pressure relief tube 251 to control on-off of the pressure relief tube 251.

In the embodiment shown in fig. 1, one end of the pressure relief tube 251 is connected to the first tube section 211 to be connected to the furnace platform 10 through the first tube section 211, and the other end of the pressure relief tube 251 is connected to the third tube section 213 to vent the gas through the third tube section 213 and the second control valve 223 to realize pressure relief.

In other embodiments, the pressure relief tube 251 may be directly connected to the oven table 10, and the other end may be directly co-located with the end of the exhaust conduit remote from the oven table 10 to effect venting of the gas, without limitation.

In some embodiments, the exhaust 20 further includes a control mechanism electrically connected to the regulator valve 221, the first control valve 222, the second control valve 223, the intake control valve 232, the waste valve 242, and the pressure relief valve 252 to automatically control the opening and closing of each valve according to the cleaning step.

Meanwhile, the control mechanism is also electrically connected to the flow meter 34 to control the opening degree of the regulating valve 221 according to the detection data of the flow meter 34 during the production process.

In order to facilitate understanding of the technical solution of the present utility model, the cleaning process of the hood-type annealing furnace will be described with reference to fig. 1:

the regulator valve 221, the first control valve 222, and the second control valve 223 are normally in an open state, and the intake control valve 232 and the exhaust valve 242 are normally in a closed state.

The first control valve 222 is closed, then the air inlet control valve 232 is opened, nitrogen washes the regulating valve 221, and impurities at the regulating valve 221 are washed away. After approximately 10 seconds of flushing, the first control valve 222 and the waste valve 242 are opened, the second control valve 223 is closed, and after approximately 15 seconds of flushing, the regulator valve 221 is closed.

The nitrogen gas then flows to the first control valve 222, flushing the first control valve 222 and the third pipe section 213, and the impurities are discharged from the waste pipe 241. After approximately 10 seconds of flushing, the exhaust valve 242 is closed, and the second control valve 223 is opened, and then the intake control valve 232 is closed. And finally resetting each valve.

It will be appreciated that, during the cleaning of the regulating valve 221, the first control valve 222 is closed, so that high-pressure nitrogen can be ensured to completely flush the regulating valve 221, and thus the flushing force is ensured. Similarly, when the third pipe segment 213 and other valves are cleaned, the flushing force can be ensured by closing the regulating valve 221.

During flushing, the air inlet control valve 232 may be opened and closed twice and three times at intervals of 2s, so that the high-pressure nitrogen is used to instantaneously flush the regulating valve 221 or the exhaust pipeline and other valves to flush out refractory impurities. The regulator valve 221 needs to be closed after the first control valve 222 is opened to avoid the occurrence of high-pressure nitrogen back flushing.

If the cleaning is carried out after the tapping, the cleaning process can be directly adopted for cleaning; if cleaning is in production, after the cleaning is completed and each valve is reset, whether impurities are cleaned can be judged by observing whether the flow of the hydrogen is normal or not according to the data of the flowmeter 34.

In addition, it should be explained that the time of one cleaning is generally short, so that the production of the oven 10 is not interrupted, and the production efficiency is ensured.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An exhaust apparatus, comprising:

the exhaust pipeline is connected with the stove table;

2. The exhaust apparatus of claim 1, wherein the exhaust conduit comprises a first pipe section, a second pipe section, and a third pipe section, the first pipe section being connected between the oven table and the regulator valve, the second pipe section being connected between the regulator valve and the first control valve, the intake assembly being connected to the second pipe section, the third pipe section being connected between the first control valve and the second control valve, the exhaust assembly being connected to the third pipe section.

3. The exhaust apparatus of claim 2, wherein the exhaust conduit further comprises a fourth pipe segment, the fourth pipe segment being connected to the second control valve.

4. The exhaust apparatus of claim 1, wherein the air intake assembly comprises an air source for providing an inert gas, an air intake pipe connected between the air source and the exhaust conduit, and an air intake control valve disposed in the air intake pipe.

5. The exhaust apparatus of claim 4, wherein the intake assembly further comprises a shut-off valve disposed in the intake pipe on a side of the intake control valve remote from the exhaust conduit.

6. The exhaust apparatus of claim 1, further comprising a pressure relief assembly connected to the oven table, wherein the pressure relief assembly is capable of being turned on when the pressure of the oven table is greater than a preset pressure to vent gas from the oven table.

7. The exhaust apparatus of claim 6, wherein the pressure relief assembly comprises a pressure relief tube and a pressure relief valve, wherein one end of the pressure relief tube is connected to the oven table, and the pressure relief valve is disposed in the pressure relief tube.

8. The exhaust apparatus of claim 7, wherein an end of the pressure relief tube remote from the hearth is connected to the exhaust duct and between the first control valve and the second control valve.

9. The exhaust apparatus of claim 1, wherein the exhaust assembly comprises an exhaust pipe and an exhaust valve, the exhaust pipe being connected to the exhaust pipe, the exhaust valve being disposed in the exhaust pipe.

10. A hood-type annealing furnace comprising a hearth and the exhaust apparatus according to any one of claims 1 to 9.