CN217636828U - Flue gas recycling system of steel rolling heating furnace - Google Patents
Flue gas recycling system of steel rolling heating furnace Download PDFInfo
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- CN217636828U CN217636828U CN202221213101.3U CN202221213101U CN217636828U CN 217636828 U CN217636828 U CN 217636828U CN 202221213101 U CN202221213101 U CN 202221213101U CN 217636828 U CN217636828 U CN 217636828U
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Abstract
The utility model discloses a flue gas recycle system of steel rolling heating furnace, including heating furnace and the nozzle of setting in the heating furnace both sides, the inlet end of every nozzle all is connected with the coal gas switching-over valve through the coal smoke union coupling, the outside of heating furnace is provided with air gas house steward and flue gas house steward, the inlet end of coal gas switching-over valve passes through air gas branch pipe and air gas house steward intercommunication, the exhanst gas outlet of coal gas switching-over valve passes through flue gas branch pipe and flue gas house steward intercommunication, the flue gas flow direction has set gradually bypass pipe and first gate valve on the every flue gas branch pipe, second gate valve and gas holder have set gradually on the bypass pipe, the end of giving vent to anger of gas holder passes through back flow and air gas branch pipe intercommunication. The utility model discloses can improve the coal gas rate of utilization, energy-concerving and environment-protective, the security is high, has apparent economic value and social value.
Description
Technical Field
The utility model relates to a heating furnace energy-saving technical field, concretely relates to flue gas recycle system of steel rolling heating furnace.
Background
The double heat accumulating type heating furnace adopts the mode of alternately burning and exhausting smoke on two sides of the heating furnace to supply heat to the furnace, and realizes the switching of air supply and air exhaust functions of the same burner by controlling the closing and opening of the reversing valve. Therefore, it is objectively needed to develop a flue gas recycling system of a steel rolling heating furnace, which can improve the utilization rate of gas, save energy, protect environment and have high safety.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can improve the coal gas rate of utilization, energy-concerving and environment-protective, high steel rolling heating furnace's of security flue gas recycle system.
The utility model aims at realizing like this, including heating furnace and the nozzle of setting in the heating furnace both sides, the inlet end of every nozzle all is connected with the coal gas switching-over valve through the coal smoke union coupling, the outside of heating furnace is provided with air gas house steward and flue gas house steward, the inlet end of coal gas switching-over valve passes through air gas branch pipe and air gas house steward intercommunication, the exhanst gas outlet of coal gas switching-over valve passes through flue gas branch pipe and flue gas house steward intercommunication, flue gas flow direction has set gradually bypass pipe and first gate valve on the every flue gas branch pipe, second gate valve and gas holder have set gradually on the bypass pipe, the end of giving vent to anger of gas holder passes through back flow and air gas branch pipe intercommunication.
Further, be provided with on the back flow and transfer the gas pitcher, the top of transferring the gas pitcher is provided with relief valve and manometer, is provided with coal gas intake pipe and air intake pipe on the lateral wall of transferring the gas pitcher, transfers the inside of gas pitcher to be provided with carbon monoxide concentration detector.
Further, a stirrer is arranged in the air adjusting tank.
Furthermore, a pressure relief pipe is arranged on a bypass pipe between the second gate valve and the gas storage tank, a pressure relief valve is arranged on the pressure relief pipe, and the end part of the pressure relief pipe is communicated with the flue gas main pipe.
Furthermore, a dust remover is arranged on a bypass pipe between the second gate valve and the air storage tank.
Furthermore, a gas mixer is arranged on the air gas branch pipe, and the gas outlet end of the return pipe is communicated with the gas mixer.
The utility model discloses during the operation, after the switching-over of coal gas switching-over valve, close first gate valve, open the second gate valve, make the coal gas of persisting in nozzle and the coal smoke pipe can follow the bypass pipe and get into the gas holder, according to the flue gas discharge velocity of flow, actual parameters such as pipe diameter, calculate the time that the interior gas outgoing of nozzle and coal smoke pipe needs, when the gas in nozzle and the coal smoke pipe is whole to be discharged into the gas holder, the shut-down state of first gate valve and second gate valve is exchanged, close the second gate valve promptly, open first gate valve, make the flue gas in the heating furnace can follow flue gas branch pipe and get into the flue gas house steward, discharge after comprehensive utilization and improvement, analogize with this, will store from the interior gas of nozzle and coal smoke pipe through the gas holder, then return to empty coal gas branch pipe through the back flow, send into the heating furnace at last and burn. Can carry out recycle to the inside coal gas of nozzle and coal smoke pipe through above-mentioned mode, improve the rate of utilization of coal gas, avoid these coal gases to cause the waste of coal gas resource along with the flue gas discharge to reduce the content of carbon monoxide in the flue gas by a wide margin, reduce the pollution to the environment, simultaneously, owing to the carbon monoxide in the pipeline of having discharged, the potential safety hazard has been eliminated to a certain extent, security when having improved equipment outage or troubleshooting. The utility model discloses can improve the coal gas rate of utilization, energy-concerving and environment-protective, the security is high, has apparent economic value and social value.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1-heating furnace, 2-burner, 3-coal smoke pipe, 4-gas reversing valve, 5-air gas main pipe, 6-flue gas main pipe, 7-air gas branch pipe, 8-flue gas branch pipe, 9-bypass pipe, 10-first gate valve, 11-second gate valve, 12-gas storage tank, 13-return pipe, 14-gas adjusting tank, 15-safety valve, 16-pressure gauge, 17-gas inlet pipe, 18-air inlet pipe, 19-carbon monoxide concentration detector, 20-stirrer, 21-pressure relief pipe, 22-dust remover and 23-gas mixer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.
As shown in fig. 1, the utility model discloses a heating furnace 1 and the nozzle 2 of setting in heating furnace 1 both sides, the inlet end of every nozzle 2 all is connected with coal gas switching-over valve 4 through coal smoke pipe 3, heating furnace 1, nozzle 2 and coal gas switching-over valve 4 are prior art, coal smoke pipe 3 sends into nozzle 2 and heating furnace 1 with coal gas on the one hand, on the other hand also sends out heating furnace 1 and the exhaust flue gas of nozzle 2 to flue gas branch pipe 8, the sharing pipeline of coal gas and flue gas, heating furnace 1's the outside is provided with air gas house steward 5 and flue gas house steward 6, air gas house steward 5 is used for carrying the gas mixture of the air that concentration is suitable and coal gas, flue gas house steward 6 is used for carrying the flue gas, air gas branch pipe 7 and air gas house steward 5 intercommunication are passed through to the inlet end of coal gas switching-over valve 4, the exhanst gas outlet of coal gas switching-over valve 4 passes through flue gas branch pipe 8 and flue gas house steward 6 intercommunication, bypass pipe 9 and first gate valve 10 have set gradually along the flue gas flow direction on every flue gas branch pipe 8, second gate valve 11 and the electric control gate valve for the convenience of giving vent to gas tank 12 are provided with second gate valve 11 in proper order on the bypass pipe 9, for the gas storage tank 12.
The utility model discloses when moving, 4 backward at the coal gas switching-over valve, close first gate valve 10, open second gate valve 11, make the coal gas of persisting in nozzle 2 and the coal smoke pipe 3 can follow bypass pipe 9 and get into gas holder 12, according to the flue gas discharge velocity, actual parameters such as pipe diameter, the time that the interior coal gas of nozzle 2 and coal smoke pipe 3 discharged needs has been calculated, when the whole gas holder 12 that discharge of coal gas in nozzle 2 and coal smoke pipe 3, exchange the shut-down state of first gate valve 10 and second gate valve 11, close second gate valve 11 promptly, open first gate valve 10, make the flue gas in the heating furnace 1 can follow flue gas branch pipe 8 and get into flue gas house steward 6, discharge after comprehensive utilization and improvement, so on, will follow the coal gas storage in nozzle 2 and the coal smoke pipe 3 through gas holder 12 and store, then return to empty coal gas branch pipe 7 through back flow 13, send into heating furnace 1 at last and burn. Can carry out recycle to the inside coal gas of nozzle 2 and soot pipe 3 through above-mentioned mode, improved the rate of utilization of coal gas, avoid these coal gases to cause the waste of coal gas resource along with the flue gas discharge, and reduce the content of carbon monoxide in the flue gas by a wide margin, reduce the pollution to the environment, simultaneously, because carbon monoxide in the pipeline has been discharged, the potential safety hazard has been eliminated to a certain extent, security when having improved equipment shutdown or troubleshooting, finally, the utility model discloses for current flue gas blowback system, can avoid the pressure oscillation in nozzle 2 and soot pipe 3, stability when improving the operation.
Be provided with on the back flow pipe 13 and transfer gas pitcher 14, the top of transferring gas pitcher 14 is provided with relief valve 15 and manometer 16, relief valve 15 and manometer 16 are current instrument, be provided with coal gas intake pipe 17 and air intake pipe 18 on the lateral wall of transferring gas pitcher 14, the inside of transferring gas pitcher 14 is provided with carbon monoxide concentration detector 19, carbon monoxide concentration detector 19 is current instrument, be used for detecting the carbon monoxide concentration of transferring gas pitcher 14, when transferring gas pitcher 14 to move, parameter through carbon monoxide concentration detector 19 survey, let in appropriate amount coal gas or air in to transferring gas pitcher 14 through coal gas intake pipe 17 or air intake pipe 18, and then ensure that the carbon monoxide concentration in transferring gas pitcher 14 meets the requirements.
The inside of adjusting gas pitcher 14 is provided with agitator 20, and agitator 20 is current equipment, can stir the gas in adjusting gas pitcher 14, and then promotes the gaseous mixture in adjusting gas pitcher 14, improves the gas efficiency of adjusting of coal gas, obtains the coal gas that concentration meets the requirements fast.
A pressure relief pipe 21 is arranged on the bypass pipe 9 between the second gate valve 11 and the gas storage tank 12, a pressure relief valve is arranged on the pressure relief pipe 21, the end part of the pressure relief pipe 21 is communicated with the flue gas main pipe 6, when the gas storage tank 12 or the return pipe 13 has a problem and cannot normally run, the pressure relief valve can be opened, and coal gas and flue gas can be sent into the flue gas main pipe 6 from the pressure relief pipe 21 and are discharged from the flue gas main pipe 6.
The dust remover 22 is arranged on the bypass pipe 9 between the second gate valve 11 and the gas storage tank 12, the flue gas discharged from the heating furnace 1 and the burner 2 contains a large amount of impurities such as dust and particles, and the dust remover 22 is in the prior art and can remove the impurities such as the dust and the particles in the flue gas, so that the coal gas is purified, and the pure coal gas is obtained.
Be provided with gas mixer 23 on air gas branch pipe 7, the end of giving vent to anger of back flow 13 communicates with gas mixer 23, and gas mixer 23 is prior art, can be with multiple gas mixture, the utility model discloses in through gas mixer 23 with two kinds of gas mixture, one of them of two kinds of gases is for following exhaust coal gas in the gas holder 12, and its two are from air gas branch pipe 7 exhaust coal gas, through mixing and the temperature and the content of balanced two kinds of coal gases, guarantee the combustion efficiency behind the coal gas entering heating furnace 1.
Claims (6)
1. A flue gas recycling system of a steel rolling heating furnace comprises a heating furnace (1) and burners (2) arranged on two sides of the heating furnace (1), and is characterized in that the gas inlet end of each burner (2) is connected with a gas reversing valve (4) through a coal gas pipe (3), an air gas main pipe (5) and a flue gas main pipe (6) are arranged on the outer side of the heating furnace (1), the gas inlet end of each gas reversing valve (4) is communicated with the air gas main pipe (5) through an air gas branch pipe (7), the flue gas outlet of each gas reversing valve (4) is communicated with the flue gas main pipe (6) through a flue gas branch pipe (8), a bypass pipe (9) and a first gate valve (10) are sequentially arranged on each flue gas branch pipe (8) along the flow direction of flue gas, a second gate valve (11) and a gas storage tank (12) are sequentially arranged on the bypass pipe (9), and the gas outlet end of the gas storage tank (12) is communicated with the air gas branch pipe (7) through a return pipe (13).
2. The flue gas recycling system of the steel rolling heating furnace according to claim 1, characterized in that the return pipe (13) is provided with a gas regulating tank (14), the top of the gas regulating tank (14) is provided with a safety valve (15) and a pressure gauge (16), the side wall of the gas regulating tank (14) is provided with a gas inlet pipe (17) and an air inlet pipe (18), and the inside of the gas regulating tank (14) is provided with a carbon monoxide concentration detector (19).
3. The flue gas recycling system of the steel rolling heating furnace according to claim 2, characterized in that the gas adjusting tank (14) is internally provided with a stirrer (20).
4. The flue gas recycling system of the steel rolling heating furnace according to claim 2, wherein a pressure relief pipe (21) is arranged on the bypass pipe (9) between the second gate valve (11) and the gas storage tank (12), a pressure relief valve is arranged on the pressure relief pipe (21), and the end part of the pressure relief pipe (21) is communicated with the flue gas main pipe (6).
5. The flue gas recycling system of a steel rolling heating furnace according to claim 1, wherein a dust collector (22) is provided on the bypass pipe (9) between the second gate valve (11) and the gas storage tank (12).
6. The flue gas recycling system of the steel rolling heating furnace according to claim 1, wherein the air gas branch pipe (7) is provided with a gas mixer (23), and the gas outlet end of the return pipe (13) is communicated with the gas mixer (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221213101.3U CN217636828U (en) | 2022-05-20 | 2022-05-20 | Flue gas recycling system of steel rolling heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221213101.3U CN217636828U (en) | 2022-05-20 | 2022-05-20 | Flue gas recycling system of steel rolling heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217636828U true CN217636828U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221213101.3U Active CN217636828U (en) | 2022-05-20 | 2022-05-20 | Flue gas recycling system of steel rolling heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217636828U (en) |
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2022
- 2022-05-20 CN CN202221213101.3U patent/CN217636828U/en active Active
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