CN219810295U - Heating furnace gas interlocking protection system - Google Patents
Heating furnace gas interlocking protection system Download PDFInfo
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- CN219810295U CN219810295U CN202320328824.6U CN202320328824U CN219810295U CN 219810295 U CN219810295 U CN 219810295U CN 202320328824 U CN202320328824 U CN 202320328824U CN 219810295 U CN219810295 U CN 219810295U
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- gas
- air pressure
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- pressure system
- pressure
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 27
- 239000000498 cooling water Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000009834 vaporization Methods 0.000 claims abstract description 5
- 230000008016 vaporization Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 54
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A heating furnace gas interlock protection system comprising: the system comprises an air pressure system, a cut-off valve, a gas pressure system, a cooling water pressure system, a steam drum system, a water beam flow transmitter, a compressed air pressure system, a PLC system, a power-off delay relay unit and a double-interlocking switching switch, wherein the air pressure system, the gas pressure system, the cooling water pressure system and the compressed air pressure system are connected with a heating furnace, the air pressure system is connected with an air pipeline, the cut-off valve and the gas pressure system are connected with a gas pipeline, the cooling water pressure system is connected with a cooling water pipeline, the steam drum system and the water beam flow transmitter are connected with a vaporization cooling system pipeline, the compressed air pressure system is connected with the compressed air pipeline, the PLC system and the power-off delay relay unit are connected with the double-interlocking switching switch, and the double-interlocking switching switch is connected with the cut-off valve. The utility model sets two sensors to prevent uncontrollable risks of a single system during faults; two sets of interlocks are arranged, so that the safety is ensured.
Description
Technical Field
The utility model relates to the field of steel production technology, in particular to a heating furnace gas interlocking protection system.
Background
The heating furnace is one of important thermal equipment in a hot rolling production line, and the safe operation of the heating furnace is related to the stability and benefit of production, the safety of equipment and the safety of field personnel. Once the ratio of the air flow rate entering the furnace to the gas flow rate is too small, the gas cannot be fully combusted in the furnace, and excessive gas can enter a flue or emerge from holes at the periphery of the furnace to cause secondary combustion, so that equipment is damaged; once the ratio of the air flow rate and the gas flow rate entering the furnace is too large, the oxygen content in the furnace is too high, so that a large amount of iron scales are generated on the surface of a blank in the furnace, and the surface quality of a product is affected. At the same time, excessive oxygen content can also lead to increased levels of NOx generated during combustion, resulting in environmental protection events. Therefore, when the detection sensor fails or the PLC system fails, the safe and stable operation of the heating furnace has great hidden trouble. Aiming at the situation, by adding the sensor and the redundant interlocking to the combustion process of the heating furnace and the equipment protection loop, the double monitoring to important factors influencing the operation safety of the heating furnace is realized, and the gas interlocking is correspondingly compiled according to the process requirements and the detection values, so that the occurrence of the safety, quality and environmental protection events can be effectively prevented.
To solve the above problems, we have made a series of improvements.
Disclosure of Invention
The utility model aims to provide a heating furnace gas interlocking protection system which overcomes the defects and shortcomings in the prior art.
A heating furnace gas interlock protection system comprising: the system comprises an air pressure system, a cut-off valve, a gas pressure system, a cooling water pressure system, a steam drum system, a water beam flow transmitter, a compressed air pressure system, a PLC system, a power-off delay relay unit and a double-interlocking switching switch, wherein the air pressure system, the gas pressure system, the cooling water pressure system and the compressed air pressure system are connected with a heating furnace, the air pressure system is connected with an air pipeline, the cut-off valve and the gas pressure system are connected with a gas pipeline, the cooling water pressure system is connected with a cooling water pipeline, the steam drum system and the water beam flow transmitter are connected with a vaporization cooling system pipeline, the compressed air pressure system is connected with the compressed air pipeline, the PLC system and the power-off delay relay unit are connected with the double-interlocking switching switch, and the double-interlocking switching switch is connected with the cut-off valve.
Further, the air pressure system includes: the air pressure transmitter, the air pressure low switch and the air pressure low switch are sequentially connected.
Further, the shut-off valve includes: the gas first quick cut-off valve and the gas second quick cut-off valve are respectively connected with the double-interlocking switch.
Further, the gas pressure system includes: the gas pressure transmitter, the gas pressure low switch and the gas pressure high switch are sequentially connected.
Further, the cooling water pressure system includes: the cooling water pressure transmitter and the cooling water pressure switch are connected in sequence.
Further, the drum system includes: the steam drum liquid level transmitter, the steam drum pressure transmitter, the steam drum liquid level low switch and the steam drum pressure high switch are connected with the steam drum.
Further, the compressed air pressure system includes: the compressed air pressure transmitter and the compressed air pressure switch are connected in sequence.
The utility model has the beneficial effects that:
compared with the prior art, two kinds of sensors, namely an electronic sensor and a mechanical sensor, are respectively arranged on each important pipeline, and when one kind of sensor fails under special conditions, the other kind of sensor can still accurately and reliably measure the process value, so that the uncontrollable risk of the system is prevented; the control of the gas cut-off valve is respectively provided with two sets of interlocks of the PLC system and the electric relay circuit, and when any set of interlocking system fails, the gas cut-off valve can still be closed rapidly. Thereby improving the safety of the whole control system and ensuring the safety of production, equipment and personnel.
Description of the drawings:
fig. 1 is a schematic structural view of the present utility model.
Reference numerals:
air pressure system 100, air pressure transmitter 110, air pressure low switch 120, and air pressure low switch 130.
Shut-off valve 200, gas first quick shut-off valve 210, and gas second quick shut-off valve 220.
Gas pressure system 300, gas pressure transmitter 310, gas pressure low switch 320, gas pressure low switch 330, and gas pressure high switch 340.
A cooling water pressure system 400, a cooling water pressure transmitter 410, and a cooling water pressure switch 420.
Drum system 500, drum level transmitter 510, drum pressure transmitter 520, drum level low switch 530, and drum pressure high switch 540.
Water beam flow transmitter 600, compressed air pressure system 700, compressed air pressure transmitter 710 and compressed air pressure switch 720, PLC system 800, power down time delay relay unit 900, and double interlock on-off switch 1000.
A heating furnace 1, an air line 2, a gas line 3, a cooling water line 4, a vaporization cooling system line 5, a compressed air line 6 and a steam drum 7.
Detailed Description
The utility model will now be further described with reference to specific examples. It should be understood that the following examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model.
Example 1
Fig. 1 is a schematic structural view of the present utility model.
As shown in fig. 1, a gas interlock protection system for a heating furnace includes: the system comprises an air pressure system 100, a shut-off valve 200, a gas pressure system 300, a cooling water pressure system 400, a steam drum system 500, a water beam flow transmitter 600, a compressed air pressure system 700, a PLC system 800, a power-off delay relay unit 900 and a double-interlocking switch 1000, wherein the air pressure system 100, the gas pressure system 300, the cooling water pressure system 400 and the compressed air pressure system 700 are connected with a heating furnace 1, the air pressure system 100 is connected with an air pipeline 2, the shut-off valve 200 and the gas pressure system 300 are connected with a gas pipeline 3, the cooling water pressure system 400 is connected with a cooling water pipeline 4, the steam drum system 500 and the water beam flow transmitter 600 are connected with a vaporization cooling system pipeline 5, the compressed air pressure system 700 is connected with the compressed air pipeline 6, the PLC system 800 and the power-off delay relay unit 900 are connected with the double-interlocking switch 1000, and the double-interlocking switch 1000 is connected with the shut-off valve 200.
The air pressure system 100 includes: the air pressure transmitter 110, the air pressure low switch 120 and the air pressure low switch 130 are connected in sequence, and the air pressure transmitter 110, the air pressure low switch 120 and the air pressure low switch 130 are connected in sequence.
The shut-off valve 200 includes: the gas first quick cut-off valve 210 and the gas second quick cut-off valve 220 are connected to the double interlock on-off switch 1000, respectively.
The gas pressure system 300 includes: the gas pressure transmitter 310, the gas pressure low switch 320, the gas pressure low switch 330 and the gas pressure high switch 340 are connected in sequence, and the gas pressure transmitter 310, the gas pressure low switch 320, the gas pressure low switch 330 and the gas pressure high switch 340 are connected in sequence.
The cooling water pressure system 400 includes: the cooling water pressure transmitter 410 and the cooling water pressure switch 420 are connected in sequence, and the cooling water pressure transmitter 410 and the cooling water pressure switch 420 are connected in sequence.
The drum system 500 includes: the drum level transmitter 510, the drum pressure transmitter 520, the drum level low switch 530 and the drum pressure high switch 540 are connected with the drum 7.
The compressed air pressure system 700 includes: compressed air pressure transmitter 710 and compressed air pressure switch 720, compressed air pressure transmitter 710 and compressed air pressure switch 720 are connected in sequence.
The operation process of the utility model comprises the following steps: the transmitters of the air line 2, the gas line 3, the cooling water line 4 and the compressed air line 6 of the heating furnace 1 collect process signals to the PLC system 800, and the PLC system 800 compares these analog signals with preset alarm limits and forms alarm signals after a certain duration is satisfied, these alarm signals form a first re-interlock, and can control the shut-off valve 200 of the gas to be closed quickly. In addition, the pressure switch and the liquid level switch on the air pipeline 2, the gas pipeline 3, the cooling water pipeline 4 and the compressed air pipeline 6 of the heating furnace collect process signals to the electrical cabinet, and are respectively and correspondingly connected to the outage time delay relay units, and the relay units form second double interlocks, so that the quick closing of the gas shut-off valve can be controlled. Therefore, double safety interlocking is formed, the gas shut-off valve can be controlled to be closed quickly at the same time, the safety control of the gas shut-off valve is not affected by the failure of any loop, and the safe operation of the whole heating furnace gas system is greatly ensured.
Compared with the prior art, two kinds of sensors, namely an electronic sensor and a mechanical sensor, are respectively arranged on each important pipeline, and when one kind of sensor fails under special conditions, the other kind of sensor can still accurately and reliably measure the process value, so that the uncontrollable risk of the system is prevented; the control of the gas cut-off valve is respectively provided with two sets of interlocks of the PLC system and the electric relay circuit, and when any set of interlocking system fails, the gas cut-off valve can still be closed rapidly. Thereby improving the safety of the whole control system and ensuring the safety of production, equipment and personnel.
The present utility model has been described in detail with reference to the embodiments, but the present utility model is not limited thereto, and various modifications may be made without departing from the spirit of the present utility model.
Claims (7)
1. A heating furnace gas interlock protection system, comprising: air pressure system (100), trip valve (200), gas pressure system (300), cooling water pressure system (400), steam drum system (500), water beam flow transmitter (600), compressed air pressure system (700), PLC system (800), outage time delay relay unit (900) and double interlocking switch (1000), air pressure system (100), gas pressure system (300), cooling water pressure system (400) and compressed air pressure system (700) are connected with heating furnace (1), air pressure system (100) are connected with air line (2), trip valve (200) and gas pressure system (300) are connected with gas line (3), cooling water pressure system (400) are connected with cooling water line (4), steam drum system (500) and water beam flow transmitter (600) are connected with vaporization cooling system line (5), compressed air pressure system (700) are connected with compressed air line (6), PLC system (800) and outage time delay relay unit (900) are connected with double interlocking switch (1000), double interlocking switch (1000) are connected with trip valve (200).
2. The heating furnace gas interlocking protection system according to claim 1, wherein: the air pressure system (100) comprises: the air pressure transmitter (110), the air pressure low switch (120) and the air pressure low switch (130) are sequentially connected.
3. The heating furnace gas interlocking protection system according to claim 1, wherein: the shut-off valve (200) comprises: the gas quick-cut-off valve (210) and the gas quick-cut-off valve (220) are connected with the double-interlocking switch (1000) respectively.
4. The heating furnace gas interlocking protection system according to claim 1, wherein: the gas pressure system (300) includes: the gas pressure transmitter (310), the gas pressure low switch (320), the gas pressure low switch (330) and the gas pressure high switch (340) are sequentially connected.
5. The heating furnace gas interlocking protection system according to claim 1, wherein: the cooling water pressure system (400) includes: the cooling water pressure transmitter (410) and the cooling water pressure switch (420) are sequentially connected.
6. The heating furnace gas interlocking protection system according to claim 1, wherein: the drum system (500) comprises: the steam drum liquid level transmitter (510), the steam drum pressure transmitter (520), the steam drum liquid level low switch (530) and the steam drum pressure high switch (540), wherein the steam drum liquid level transmitter (510), the steam drum pressure transmitter (520), the steam drum liquid level low switch (530) and the steam drum pressure high switch (540) are connected with the steam drum (7).
7. The heating furnace gas interlocking protection system according to claim 1, wherein: the compressed air pressure system (700) comprises: a compressed air pressure transmitter (710) and a compressed air pressure switch (720), the compressed air pressure transmitter (710) and the compressed air pressure switch (720) being connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320328824.6U CN219810295U (en) | 2023-02-27 | 2023-02-27 | Heating furnace gas interlocking protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320328824.6U CN219810295U (en) | 2023-02-27 | 2023-02-27 | Heating furnace gas interlocking protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219810295U true CN219810295U (en) | 2023-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320328824.6U Active CN219810295U (en) | 2023-02-27 | 2023-02-27 | Heating furnace gas interlocking protection system |
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| Country | Link |
|---|---|
| CN (1) | CN219810295U (en) |
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2023
- 2023-02-27 CN CN202320328824.6U patent/CN219810295U/en active Active
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