CN212727438U - Minimum flow interlock control device of decarbonization workshop section entry - Google Patents
Minimum flow interlock control device of decarbonization workshop section entry Download PDFInfo
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- CN212727438U CN212727438U CN202021861764.7U CN202021861764U CN212727438U CN 212727438 U CN212727438 U CN 212727438U CN 202021861764 U CN202021861764 U CN 202021861764U CN 212727438 U CN212727438 U CN 212727438U
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Abstract
The utility model discloses a minimum flow interlocking control device of decarbonization workshop section entry, including AND gate & the input of AND gate & respectively in the heater go into raw materials and interlock and drop into and link to each other, the output of AND gate & link to each other with two configuration unit S1, the output of two configuration unit S1 links to each other with OR gate OR; the double-configuration unit is provided with an R reset structure to realize reset operation; the OR gate OR is also provided with a manual control key for manually stopping the electric heater; the utility model has the advantages that: simple structure, low cost and good use effect.
Description
Technical Field
The utility model relates to a flow automatic control equipment, specifically speaking are minimum flow interlock control device of decarbonization workshop section entry belongs to flow automatic control equipment field.
Background
In the existing design, coke oven gas from a gas purification section enters a decarburization section for electric heating, and only an outlet of an electric heater is provided with a temperature linkage. In actual operation, only one outlet temperature cannot ensure the safe and stable operation of the section and the electric heater. The electric heater is easy to be dry-burned due to low flow, and the temperature of the hearth is increased suddenly, so that accidents are caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to design a minimum flow interlock control device of decarbonization workshop section entry, make whole electric heater and workshop section can automatic chain operation of safety and stability.
The technical scheme of the utility model is that:
a minimum flow interlocking control device at the inlet of a decarburization working section comprises an AND gate, wherein the input ends of the AND gate are respectively connected with a heater feeding material and an interlocking input, the output end of the AND gate is connected with a double-state unit S1, and the output end of the double-state unit S1 is connected with an OR gate OR; the double-configuration unit is provided with an R reset structure to realize reset operation; the OR gate OR is further provided with a manual control key which can manually stop the electric heater.
The electric heater, namely the decarburization electric heater, is provided with an electric heater control cabinet overcurrent protection (I is more than 350A) and an electric heater control cabinet overtemperature protection (T is more than 300 ℃).
The raw material gas flow of the heater is less than 5000Nm/h, when the heater is switched in an interlocking mode, the output of the AND gate is 1 to the double-configuration unit S1, when the input of the S1 is 1, the output of the AND gate is 1 to the OR gate, and the output is 0 because the OR gate is inverted, and the electric heater stops; or to stop the electric heater manually. Before starting, alarming or fault resetting is carried out, after the resetting, the flow rate of the heater raw material gas is larger than 5000Nm/h, when the interlocking is switched in, the AND gate outputs 0 to the double-configuration unit S1, when the S1 inputs 0, the AND gate outputs 0 to the OR gate immediately, because the OR gate is inverted, the output is 1, and the electric heater operates.
The utility model has the advantages that: the whole electric heater and the working section can safely, stably and automatically run in a chain way.
The temperature of a hearth is led out from the electric heater, a secondary meter is connected to be interlocked with electricity, and the temperature exceeds the set temperature by 300 ℃ to interlock the power-off heater; then the flow of the coke oven gas introduced into the inlet of the electric heater is less than 5000 Nm/h.
The present invention will be further explained with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic structural diagram of a minimum flow interlock control device at the inlet of a decarburization section according to an embodiment of the present invention (in the figure, the logic symbols respectively represent a symbol of & represents a logic AND gate; S1, R respectively represent a logic double configuration unit "S1 SET, R RESET"; OR represents a symbol of a logic OR gate; and O represents a symbol of a logic NOT gate ").
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is not intended to limit the invention.
Example 1
As shown in fig. 1, a minimum flow interlock control apparatus for an inlet of a decarburization section includes an and gate having inputs connected to a heater input material and an interlock input, respectively, and having an output connected to a two-configuration unit S1, and an output connected to an OR gate OR of the two-configuration unit S1; the double-configuration unit is provided with an R reset structure to realize reset operation; the OR gate OR is further provided with a manual control key which can manually stop the electric heater.
The electric heater, namely the decarburization electric heater, is provided with an electric heater control cabinet overcurrent protection (I is more than 350A) and an electric heater control cabinet overtemperature protection (T is more than 300 ℃).
The raw material gas flow of the heater is less than 5000Nm/h, when the heater is switched in an interlocking mode, the output of the AND gate is 1 to the double-configuration unit S1, when the input of the S1 is 1, the output of the AND gate is 1 to the OR gate, and the output is 0 because the OR gate is inverted, and the electric heater stops; or to stop the electric heater manually. Before starting, alarming or fault resetting is carried out, after the resetting, the flow rate of the heater raw material gas is larger than 5000Nm/h, when the interlocking is switched in, the AND gate outputs 0 to the double-configuration unit S1, when the S1 inputs 0, the AND gate outputs 0 to the OR gate immediately, because the OR gate is inverted, the output is 1, and the electric heater operates.
The temperature of a furnace chamber of the electric heater is increased and linked, and the flow is decreased and linked.
The technical essential that is different from the operation of current electric heater:
when the flow is lower than 5000Nm/h, the electric heater is stopped, and accidents such as dry burning, explosion of the electric heater and the like caused by high temperature of a hearth of the electric heater due to low gas flow are prevented.
Compared with the original design, the double-linkage protection is added, and the safe and stable production is met.
1. And flowmeters are arranged on coke oven gas pipelines at the inlets of the decarburization working section and the electric heater, measured data are introduced into the DCS, and then a trip signal is output to the electrical control cabinet according to the linkage relation.
2. The temperature of the hearth of the electric heater is led into a secondary meter control loop of the electric control cabinet, and when the measured temperature reaches the set temperature, the purpose of chain shutdown is achieved.
δ basic and gate: when all logic inputs are 1, the logic output is 1;
S1R basic bistable cell: when the logic input of the S1 is 1, the logic output is 1; until the R logic input is 1, the logic output is 0.
OR basic OR gate: the logic output is 1 only when one or both of the logic inputs are 1 states
NOT gate: the logic output is 0 only when the logic input is in the state of 1.
Claims (2)
1. The minimum flow interlocking control device for the inlet of the decarburization working section is characterized in that: the system comprises an AND gate & with the input ends connected with a heater input material and an interlock input respectively, the output end of the AND gate & is connected with a double-configuration unit S1, and the output end of the double-configuration unit S1 is connected with an OR gate OR; the double-configuration unit is provided with an R reset structure to realize reset operation; the OR gate OR is also provided with a manual control key for manually stopping the electric heater.
2. The device for interlocking the minimum flow rate at the inlet of the decarburization section as claimed in claim 1, wherein: the electric heater, namely the decarburization electric heater, is provided with an electric heater control cabinet overcurrent protection and an electric heater control cabinet overtemperature protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021861764.7U CN212727438U (en) | 2020-08-31 | 2020-08-31 | Minimum flow interlock control device of decarbonization workshop section entry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021861764.7U CN212727438U (en) | 2020-08-31 | 2020-08-31 | Minimum flow interlock control device of decarbonization workshop section entry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212727438U true CN212727438U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021861764.7U Active CN212727438U (en) | 2020-08-31 | 2020-08-31 | Minimum flow interlock control device of decarbonization workshop section entry |
Country Status (1)
| Country | Link |
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| CN (1) | CN212727438U (en) |
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2020
- 2020-08-31 CN CN202021861764.7U patent/CN212727438U/en active Active
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