CN109539564B - Heating furnace dangerous case emergency interlocking control method, device and system - Google Patents
Heating furnace dangerous case emergency interlocking control method, device and system Download PDFInfo
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- CN109539564B CN109539564B CN201811146798.5A CN201811146798A CN109539564B CN 109539564 B CN109539564 B CN 109539564B CN 201811146798 A CN201811146798 A CN 201811146798A CN 109539564 B CN109539564 B CN 109539564B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 189
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000779 smoke Substances 0.000 claims abstract description 63
- 239000011261 inert gas Substances 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 15
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000000306 component Substances 0.000 description 50
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- 239000000523 sample Substances 0.000 description 5
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
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- 239000003546 flue gas Substances 0.000 description 2
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/04—Arrangements of indicators or alarms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
- F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
- F27D2019/0015—Monitoring the composition of the exhaust gases or of one of its components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0068—Regulation involving a measured inflow of a particular gas in the enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D2021/0007—Monitoring the pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a heating furnace dangerous case emergency interlocking control method, a device and a system, wherein the control method comprises the following steps: detecting the temperature and the smoke components in a flue of a heating furnace and the pressure difference of fluid in a plurality of pipelines passing through the heating furnace; comparing the temperature with a set temperature, and if the temperature is greater than or equal to the set temperature, obtaining a first judgment condition; comparing the sizes of the smoke components with preset smoke components, and if the smoke components are larger than or equal to the preset smoke components, obtaining a second judgment condition; comparing the pressure difference with a preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, obtaining a third judgment condition; and if the first judgment condition, the second judgment condition and the third judgment condition are met simultaneously, controlling the heating furnace to stop heating, cutting off the fluid in the pipelines and opening an inert gas source connected with the heating furnace.
Description
Technical Field
The invention relates to the field of oil field heating furnaces, in particular to a heating furnace dangerous case emergency interlocking control method, device and system.
Background
The heating furnace in the natural gas branch company station is a medium-large fire tube type heating furnace, the heating furnace is high in efficiency and large in handling capacity, the temperature can be increased, and the heating furnace plays an important role in the station. But the disadvantage is that the burner directly heats the coil pipe, the medium in the coil pipe is pure crude oil, the production temperature needs to be high, generally about 200 ℃, once the crude oil leaks from the coil pipe, a fire can be formed, and a major safety production accident of explosion and explosion can be caused. Therefore, a set of dangerous case emergency treatment device is urgently needed on site, when a heating furnace is in a dangerous case, a fire disaster can be effectively extinguished in time, corresponding chain protection is started, the fire is prevented from spreading, and personnel and equipment safety is protected.
The heating furnace is a main device in a production enterprise, is widely applied in production, and utilizes flame to heat an intermediate medium or a raw material. The main fuel and the heated medium are mostly flammable and explosive articles such as natural gas, fuel oil, liquefied petroleum gas and the like, and the fire operation has great danger, so the fire-proof and explosion-proof key parts in the production process of enterprises are always provided.
In recent years, with the improvement of the overall production process of the heating furnace and the gradual strictness of safety management, chain protection devices such as flameout protection, leakage protection, liquid level protection, high-low pressure protection and the like are added to the heating furnace, and prevention are expected. But in fact, heating furnace accidents still occur every year, causing serious personnel and property losses.
The current field situation is as follows: the analysis of a plurality of accident sites over the years is combined, and the main reason is that the previous work focus is always focused on safety prevention, but the emergency treatment after the dangerous case occurs is neglected, the precious emergency time is wasted, and the spread of fire is caused. And after the fire disaster dangerous case happens, people can be evacuated, and 119 dialing is carried out to wait for rescue. Because the site is flammable and explosive, the spread of the disaster is inevitable during the period. Even after the fire brigade arrives at the site, the fire fighting time is long because the site conditions are special.
Disclosure of Invention
In view of the above, the invention provides a heating furnace dangerous case emergency interlocking control method, device and system, so as to solve the problem that a fire disaster cannot be timely extinguished on site when a heating furnace is in a dangerous case.
In a first aspect, the invention provides a heating furnace dangerous case emergency interlocking control method, which comprises the following steps:
detecting the temperature and the smoke components in a flue of a heating furnace and the pressure difference of fluid in a plurality of pipelines passing through the heating furnace;
comparing the temperature with a set temperature, and if the temperature is greater than or equal to the set temperature, obtaining a first judgment condition;
comparing the sizes of the smoke components with preset smoke components, and if the smoke components are larger than or equal to the preset smoke components, obtaining a second judgment condition;
comparing the pressure difference with a preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, obtaining a third judgment condition;
if one of the first judgment condition, the second judgment condition and the third judgment condition is met, alarming;
and if the first judgment condition, the second judgment condition and the third judgment condition are met simultaneously, controlling the heating furnace to stop heating, cutting off the fluid in the pipelines and opening an inert gas source connected with the heating furnace.
Preferably, if the first determination condition, the second determination condition and the third determination condition are simultaneously satisfied, the heating furnace is controlled to stop heating, the fluid in the pipelines is cut off, and an inert gas source connected with the heating furnace is turned on.
Preferably, the set temperature is 260 ℃;
the smoke component is a carbon monoxide component, the preset component is a carbon monoxide component, and the content of the preset smoke component is 5%;
the preset pressure difference is 0.3 Mpa.
In a second aspect, the present invention provides an emergency interlocking device for a heating furnace, including:
the emergency interlocking control method for the heating furnace in the dangerous case comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program is the emergency interlocking control method for the heating furnace in the dangerous case, and the processor executes the program to realize the following steps:
detecting the temperature and the smoke components in a flue of a heating furnace and the pressure difference of fluid in a plurality of pipelines passing through the heating furnace;
comparing the temperature with a set temperature, and if the temperature is greater than or equal to the set temperature, obtaining a first judgment condition;
comparing the sizes of the smoke components with preset smoke components, and if the smoke components are larger than or equal to the preset smoke components, obtaining a second judgment condition;
comparing the pressure difference with a preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, obtaining a third judgment condition;
if one of the first judgment condition, the second judgment condition and the third judgment condition is met, alarming;
and if the first judgment condition, the second judgment condition and the third judgment condition are met simultaneously, controlling the heating furnace to stop heating, cutting off the fluid in the pipelines and opening an inert gas source connected with the heating furnace.
Preferably, the memory and processor are integrated within a controller;
the heating furnace is connected with the burner through a heating valve of the heating furnace;
the furnace body of the heating furnace penetrates through the pipelines;
the heating furnace is also connected with the inert gas source through an inert gas valve;
the heating furnace is respectively connected with a temperature sensor, a gas sensor and a differential pressure sensor, and the temperature sensor, the gas sensor and the differential pressure sensor are also connected with the controller
The heating furnace is used for heating the fluid in the pipelines;
the temperature sensor is used for detecting the temperature in the flue of the heating furnace;
the gas sensor is used for detecting the smoke components in the flue of the heating furnace;
the pressure difference sensor is used for detecting the pressure difference of fluid in the pipelines;
the pipelines are provided with pipeline valves;
if one of the first judgment condition, the second judgment condition and the third judgment condition is met, the controller gives an alarm;
and if the first judgment condition, the second judgment condition and the third judgment condition are simultaneously met, controlling the heating valve of the heating furnace to be closed, the pipeline valve to be closed and the inert gas valve to be opened by a controller.
In a third aspect, the present invention provides a heating furnace emergency interlocking control device, which includes:
the device comprises a detection unit, a first comparison unit, a second comparison unit, a third comparison unit and a control unit;
the detection unit is used for detecting the temperature and the smoke components in the flue of the heating furnace and the pressure difference of fluid in a plurality of pipelines penetrating through the heating furnace;
the first comparison unit compares the temperature with a set temperature, and if the temperature is greater than or equal to the set temperature, a first judgment condition is obtained;
the second comparison unit compares the sizes of the smoke component and a preset smoke component, and if the smoke component is greater than or equal to the preset smoke component, a second judgment condition is obtained;
the third comparison unit compares the pressure difference with a preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, a third judgment condition is obtained;
if one of the first judgment condition, the second judgment condition and the third judgment condition is met, the control unit gives an alarm;
if the first judgment condition, the second judgment condition and the third judgment condition are met simultaneously, the control unit controls the heating furnace to stop heating, cut off the fluid in the pipelines and turn on an inert gas source connected with the heating furnace.
In a fourth aspect, the present invention provides a heating furnace emergency interlocking control system, including:
the heating furnace dangerous case emergency interlocking control method and/or the heating furnace dangerous case emergency interlocking control method;
the heating furnace dangerous case emergency interlocking control device and/or the heating furnace dangerous case emergency interlocking control device is/are provided;
the emergency interlocking control device for the heating furnace in the dangerous case is disclosed.
The invention has at least the following beneficial effects:
the invention provides a heating furnace dangerous case emergency interlocking control method, device and system, and aims to solve the problem that a fire disaster cannot be timely extinguished on site when a heating furnace is in a dangerous case.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of a method for emergency interlocking control of a heating furnace in a dangerous case according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an emergency interlocking device or system for a heating furnace in case of dangerous situation according to an embodiment of the present invention;
FIG. 3 is a schematic block diagram of an electrical circuit of an emergency interlocking device or system for a heating furnace in an emergency situation according to an embodiment of the present invention;
fig. 4 is a schematic circuit block diagram of a heating furnace emergency interlocking device or system implemented by using a single chip microcomputer according to an embodiment of the present invention.
Detailed Description
The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth. However, the present invention may be fully understood by those skilled in the art for those parts not described in detail.
Furthermore, those skilled in the art will appreciate that the drawings are provided solely for the purposes of illustrating the invention, features and advantages thereof, and are not necessarily drawn to scale.
Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".
Fig. 1 is a flowchart of a heating furnace emergency interlocking control method according to an embodiment of the present invention. As shown in fig. 1, a method for controlling emergency interlocking of a heating furnace in a dangerous situation includes: step 101, detecting the temperature and the smoke components in a flue of a heating furnace and the pressure difference of fluid in a plurality of pipelines penetrating through the heating furnace; step 102, comparing the temperature with a set temperature, and if the temperature is greater than or equal to the set temperature, obtaining a first judgment condition; 103, comparing the sizes of the smoke components with preset smoke components, and if the smoke components are larger than or equal to the preset smoke components, obtaining a second judgment condition; step 104, comparing the pressure difference with a preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, obtaining a third judgment condition; step 105, if one of the first judgment condition, the second judgment condition and the third judgment condition is met, alarming; and 106, if the first judgment condition, the second judgment condition and the third judgment condition are simultaneously met, controlling the heating furnace to stop heating, cutting off the fluid in the pipelines and opening an inert gas source connected with the heating furnace.
Further, in step 106 in fig. 1, if the first determination condition, the second determination condition and the third determination condition are simultaneously satisfied, the heating furnace is controlled to stop heating, the fluid in the plurality of pipelines is cut off, and the inert gas source connected to the heating furnace is turned on.
Specifically, a temperature of 260 ℃ is set in fig. 1; the smoke component is a carbon monoxide component, the preset component is a carbon monoxide component, and the content of the preset smoke component is 5%; the preset pressure difference is 0.3 Mpa.
A heating furnace dangerous case emergency interlocking control device comprises: the emergency interlocking control method for the heating furnace in the dangerous case comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the computer program is the emergency interlocking control method for the heating furnace, and the processor executes the program to realize the following steps:
Fig. 2 is a schematic diagram of an emergency interlocking device or system for a heating furnace in case of dangerous situation according to an embodiment of the present invention. Fig. 3 is a schematic block diagram of a circuit of an emergency interlocking device or system for a heating furnace in an emergency situation according to an embodiment of the present invention. As shown in fig. 2 and 3, the memory and processor as above are integrated within the controller 8; the heating furnace 1 is connected with the burner 3 through a heating valve 3-1 of the heating furnace; the furnace body of the heating furnace 1 passes through a plurality of pipelines 2; the heating furnace 1 is also connected with an inert gas source 4 through an inert gas valve 4-1; the heating furnace 1 is respectively connected with the gas sensor 6, the gas sensor 6 and the differential pressure sensor 5, and the gas sensor 6, the gas sensor 6 and the differential pressure sensor 5 are also connected with the controller 8 to be connected with the heating furnace 1 and used for heating fluid in the pipelines 2; a temperature sensor 7 for detecting the temperature in the heating furnace 1; the gas sensor 6 is used for detecting the components of the flue gas in the heating furnace 1; a differential pressure sensor 5 for detecting a differential pressure of the fluid in the plurality of pipelines 2; a plurality of pipelines 2 are provided with pipeline valves 2-1; if one of the first judgment condition, the second judgment condition and the third judgment condition is met, the controller 8 gives an alarm; if the first judgment condition, the second judgment condition and the third judgment condition are met, the controller 8 controls the heating valve 3-1 of the heating furnace to be closed, the pipeline valve 2-1 to be closed and the inert gas valve 4-1 to be opened. As long as 2 of the temperature sensor 7, the gas sensor 6 and the differential pressure sensor 5 work normally, the operation of the heating valve 3-1 of the heating furnace, the pipeline valve 2-closing and the inert gas valve 4-1 can be completed.
In the emergency interlocking device for the dangerous case of the heating furnace, the inert gas source 4 can be carbon dioxide gas.
In fig. 2 and 3, the preset temperature may be 260 ℃, and when the temperature detected by the temperature sensor 7 is greater than or equal to 260 ℃, a first determination condition is obtained; the preset pressure difference may be 0; 3Mpa, when the pressure difference detected by the pressure difference sensor 5 is greater than or equal to 0; 3Mpa to obtain a second judgment condition; the gas sensor 6 is a carbon monoxide sensor. Specifically, in fig. 2, the preset flue gas component is a preset carbon monoxide component, the content of the preset carbon monoxide component is 5%, and the gas sensor 6 detects that the content of the carbon monoxide component is greater than or equal to 5% to obtain a third judgment condition. If the first judgment condition, the second judgment condition and the third judgment condition are met, the controller 8 controls the heating valve 3-1 of the heating furnace to be closed, the pipeline valve 2-1 to be closed and the inert gas valve 4-1 to be opened.
In fig. 2 and 3, specifically, the controller 8 may select an embedded control unit such as a single chip microcomputer or a PLC.
In fig. 2, several pipelines 2 are exemplified by 3: the first pipeline has one end 1#An inlet, one end of the second pipeline is 1#An outlet; the second pipeline has one end of 2#An inlet, one end of the second pipeline is 2#An outlet; one end of the third pipeline is 3#Inlet, one end of the third pipeline is 3#And (7) an outlet.
In the emergency interlocking devices for the dangerous situations of the heating furnaces, the gas sensor 6 is a carbon monoxide sensor.
In the dangerous case emergency interlocking devices of the heating furnaces, the fluid is one or more of oil, natural gas or oil-water mixture.
Another heating furnace dangerous case emergency interlocking control device comprises: the device comprises a detection unit, a first comparison unit, a second comparison unit, a third comparison unit and a control unit; the detection unit is used for detecting the temperature and the smoke components in the flue of the heating furnace and the pressure difference of fluid in a plurality of pipelines penetrating through the heating furnace; the first comparison unit is used for comparing the temperature with the set temperature, and obtaining a first judgment condition if the temperature is greater than or equal to the set temperature; the second comparison unit is used for comparing the sizes of the smoke components and the preset smoke components, and if the smoke components are larger than or equal to the preset smoke components, a second judgment condition is obtained; the third comparison unit is used for comparing the pressure difference with the preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, a third judgment condition is obtained; if one of the first judgment condition, the second judgment condition and the third judgment condition is met, the control unit gives an alarm; if the first judgment condition, the second judgment condition and the third judgment condition are met, the control unit controls the heating furnace to stop heating, cut off the fluid in the pipelines and open the inert gas source connected with the heating furnace.
A heating furnace dangerous case emergency interlocking control system comprises: the method for controlling the emergency interlocking of the heating furnace in the dangerous case and/or the emergency interlocking; the emergency interlocking control device for the heating furnace in the dangerous case and/or the emergency interlocking control device; the emergency interlocking control device for the heating furnace in the dangerous case is disclosed.
Fig. 4 is a schematic circuit block diagram of a heating furnace emergency interlocking device or system implemented by using a single chip microcomputer according to an embodiment of the present invention. As shown in fig. 3 and 4, the selected type of the single chip microcomputer is the single chip microcomputer C8051F121, the single chip microcomputer C8051F121 is provided with a plurality of input IO ports and output IO ports, and the temperature sensor 7, the gas sensor 6 and the differential pressure sensor 5 are respectively connected with the input IO ports of the single chip microcomputer C8051F 121; an output IO port of the singlechip C8051F121 is connected with a heating furnace heating valve 3-1, an inert gas valve 4-1 and a pipeline valve 2-1.
In this patent, gas sensor 6 installs on heating furnace 1 flue, in case there is the seepage crude oil in heating furnace 1 furnace, even slight, also can produce black cigarette, leads to carbon monoxide to exceed standard, and gas sensor 6 will show the parameter in real time, and the warning that exceeds standard reminds the person on duty to confirm the trouble.
In this patent, a temperature sensor 7 may be installed on the flue of the heating furnace 1 to detect the flue temperature. If leaked crude oil exists in the hearth of the heating furnace 1 (namely, fluid in a plurality of pipelines 2 leaks into the hearth of the heating furnace 1), the leaked crude oil can be instantly combusted, and the temperature of the exhaust gas is abnormally increased. And the data parameters are monitored and displayed on line in real time, and the alarm is given to remind the on-duty personnel to confirm the data parameters at the first time.
In this patent, a differential pressure sensor 5 is installed on a process inlet and outlet pipeline (i.e., a plurality of pipelines 2), and whether there is a leakage point is judged according to the change of the inlet and outlet differential pressure. Once the coil pipe has a leakage point, the pressure drop of the inlet and the outlet can be increased, and an alarm is given to prompt an operator on duty to confirm after abnormality.
Specifically, the temperature sensor 7 can adopt an STS _94099 temperature sensor manufactured by New Union of Shenzhen, and the AMP interface temperature sensor SSTS _94099 has a very firm structure, is leakproof and quick in response, and leaves the factory after 100% of finished products are tested to be qualified. The indexes of the AMP interface temperature sensor SSTS _94099 are: 1. nominal resistance: 2.251 ohm (25 ℃)/153 ohm (100 ℃); 2. the temperature measuring range is as follows: -40 ℃ to +155 ℃; 3. response time: t90.
Specifically, the gas sensor 6 may be a carbon monoxide sensor produced by New Union, Shenzhen. The types of gas sensors include: thermal conductivity type gas sensors (hot wire type gas sensors and thermistor gas sensors), contact combustion type gas sensors, semiconductor gas sensors, infrared gas sensors, optical fiber gas sensors, and the like. A gas sensor refers to a device or device that converts the type, concentration and composition of a gas to be measured into an electrical signal in a certain relationship therewith, and is used to provide information about the presence and concentration of the gas to be measured. The gas sensor, which is the core of the gas detection system, is usually mounted in a probe head that conditions the gas sample through the gas sensor, usually including filtering out impurities and interfering gases, drying or refrigeration processes, sample pumping, and even chemical processing of the sample for faster measurements by the chemical sensor.
The gas sensor is mainly used for monitoring, forecasting and automatically controlling flammable, explosive, poisonous and harmful gases in the departments of natural gas, coal gas, petrochemical industry and the like in industry. Gas sensors have some of the following main properties: 1. and (4) sensitivity. Sensitivity is the ratio of the amount of change in sensor output to the amount of change in measured input, and is primarily dependent on the technology used in the sensor structure. Most gas sensors are designed on the principles of biochemistry, electrochemistry, physics, and optics. The first consideration is to select a sensitive technique that is sufficiently sensitive to detect the percentage of the broad or minimum explosive limit of the target gas. 2. And (4) stability. Stability refers to the stability of the response of the sensor over the entire operating time, and depends on zero point stack shift and interval drift. Zero drift refers to the change in sensor output response over the entire operating time in the absence of the target gas. Interval drift is the change in output response of a sensor continuously placed in a target gas, manifested as a decrease in the sensor output signal over operating time. Ideally, one sensor has a zero drift of less than 10% per year under continuous operating conditions. 3. Corrosion resistance. Corrosion resistance refers to the ability of the sensor to be exposed to a high volume fraction of the target gas. When a large amount of gas leaks, the probe can bear 1O-20 times of the expected volume fraction of the gas. The sensor drift and zero correction values should be as small as possible upon return to normal operating conditions. 4. And (4) selectivity. Selectivity, also known as cross-sensitivity, can be determined by measuring the sensor response produced by a concentration of interfering gas. This response is equivalent to the sensor response generated by a concentration of the target gas. This property is very important in applications that track multiple gases, and an ideal sensor should have high sensitivity and high selectivity.
Specifically, the differential pressure sensor 5 may be a differential pressure sensor model PTJ601G manufactured by haoye electronics ltd. The PTJ601G model differential pressure sensor is a special differential pressure sensor (high precision) for fire-fighting positive pressure air supply, and is used for controlling the front chamber, the shared front chamber, the fire elevator front chamber and the closed refuge chamber; the normally open contact of the pressure difference controller is closed, a power supply of a control box of the roof bypass pressure relief valve is switched on, the bypass pressure relief valve on the roof is opened for air supply and pressure relief, the pressure difference value is reduced, when the pressure difference value is reduced to a certain value, the contact of the wind pressure difference sensor controller is disconnected, the power of the roof bypass valve is cut off, and the bypass valve is closed to stop pressure relief. The PTJ601G model differential pressure sensor is characterized in that: 1. a sensing technology is adopted, and a core component adopts a foreign imported core body; 2. and directly changing the sensor signal into a changeable passive switching value signal by using a micro-processing circuit; 3. the output action point is more accurate, and the repeatability is high; 4. the product adopts a new technology to ensure that the resetting process can be changed arbitrarily according to the requirements of users; 5: the quality reliability is equivalent to the acquisition and combination of the sensing and the controller in a new direction; the product with the same cost performance is superior; the device is mainly applied to the fire-fighting positive pressure air supply sensing pressure difference high requirement control relief valve and residual pressure valve action; the high-precision differential pressure control is required to be applied in a target industrial system; the product is also called as positive pressure air supply sensor, pressure difference measuring and controlling device, wind pressure difference sensor, etc. Measurement range: 0-100 pa withstand voltage: 1000PA precision: 0; 5% FS action pressure: front chamber measurement and control: 30Pa, reset pressure: 20 PA.
In the dangerous case emergency interlocking devices of the heating furnaces, the controller 8 comprises or is connected with a human-computer interaction unit 8-1; and the human-computer interaction unit 8-1 is used for displaying the temperature or the pressure difference or the smoke components and setting the temperature or the preset smoke components or the preset pressure difference.
Specifically, the human-computer interaction unit 8-1 includes: a display screen and keys; the display screen is used for displaying temperature or pressure difference or smoke components; the key is used for setting temperature or presetting smoke components or presetting pressure difference.
This patent influences after using: this patent detects data abnormal fluctuation when installing the detector (i.e. temperature sensor 7, gas sensor 6 and differential pressure sensor 5) at heating furnace and chimney position, with signal transmission to central control interlocking gear, through this patent and perhaps personnel judge, closes corresponding valve, starts inert gas fire extinguishing systems, puts out the conflagration and gets rid of dangerous situation, and whole process can be accomplished in 60 seconds. Because the inert gas adopts the full-submerged type asphyxiation fire extinguishing around the fire point, the fire can be effectively prevented from spreading, and the property loss can be reduced to the maximum extent.
In summary, this patent includes: the device comprises a dangerous case detection mechanism, a central control interlocking mechanism and an inert gas disposal mechanism. Dangerous case detection mechanism: through each part of the heating furnace 1 and the heating furnace 1, the temperature sensor 7, the gas sensor 6 and the differential pressure sensor 5 are respectively connected, the temperature sensor 7, the gas sensor 6 and the differential pressure sensor 5 (namely, the temperature-sensitive detector, the smoke-sensitive detector and the pressure-sensitive detector) can find dangerous situations at the first time, and the conventional fire detectors are all used for civil buildings and are not used for high-temperature and high-pressure open fires of the heating furnace. Central control linkage (i.e., controller 8): after receiving the data signal sent by the dangerous case detection mechanism, comparing the data, finding out the abnormality, and starting the inert gas disposal mechanism according to a preset program. An inert gas disposal mechanism comprising: the inert gas disposal mechanism receives signals sent by the central control interlocking mechanism, closes all valves (a heating furnace heating valve 3-1 and a pipeline valve 2-1), starts the inert gas valve 4-1 of the inert gas source 4, outputs inert gas and effectively extinguishes fire in the heating furnace 1.
The above-mentioned embodiments are merely embodiments for expressing the invention, and the description is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, substitutions of equivalents, improvements and the like can be made without departing from the spirit of the invention, and these are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A heating furnace dangerous case emergency interlocking control method is characterized by comprising the following steps:
detecting the temperature and the smoke components in a flue of a heating furnace and the pressure difference of fluid in a plurality of pipelines passing through the heating furnace;
comparing the temperature with a set temperature, and if the temperature is greater than or equal to the set temperature, obtaining a first judgment condition;
comparing the sizes of the smoke components with preset smoke components, and if the smoke components are larger than or equal to the preset smoke components, obtaining a second judgment condition;
comparing the pressure difference with a preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, obtaining a third judgment condition;
if one of the first judgment condition, the second judgment condition and the third judgment condition is met, alarming;
when alarming, the heating furnace is manually operated to stop heating, fluid in a plurality of pipelines is cut off, and an inert gas source connected with the heating furnace is opened;
and if the first judgment condition, the second judgment condition and the third judgment condition are met simultaneously, automatically controlling the heating furnace to stop heating, cutting off the fluid in the pipelines and opening an inert gas source connected with the heating furnace.
2. The emergency interlocking control method for the dangerous case of the heating furnace according to claim 1, wherein:
and if the first judgment condition, the second judgment condition and the third judgment condition are met at the same time, controlling the heating furnace to stop heating, cutting off the fluid in the pipelines and opening an inert gas source connected with the heating furnace.
3. The emergency interlocking control method for the dangerous case of the heating furnace according to claim 1 or 2, wherein:
the set temperature is 260 ℃;
the smoke component is a carbon monoxide component, the preset component is a carbon monoxide component, and the content of the preset smoke component is 5%;
the preset pressure difference is 0.3 Mpa.
4. The utility model provides a heating furnace emergency interlocking device, its characterized in that includes:
a memory and a processor, and a computer program stored on the memory and operable on the processor, wherein the computer program is a heating furnace emergency interlock control method according to any one of claims 1 to 3, and the processor executes the program to implement the following steps:
detecting the temperature and the smoke components in a flue of a heating furnace and the pressure difference of fluid in a plurality of pipelines passing through the heating furnace;
comparing the temperature with a set temperature, and if the temperature is greater than or equal to the set temperature, obtaining a first judgment condition;
comparing the sizes of the smoke components with preset smoke components, and if the smoke components are larger than or equal to the preset smoke components, obtaining a second judgment condition;
comparing the pressure difference with a preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, obtaining a third judgment condition;
if one of the first judgment condition, the second judgment condition and the third judgment condition is met, alarming;
when alarming, the heating furnace is manually operated to stop heating, fluid in a plurality of pipelines is cut off, and an inert gas source connected with the heating furnace is opened; and if the first judgment condition, the second judgment condition and the third judgment condition are met simultaneously, automatically controlling the heating furnace to stop heating, cutting off the fluid in the pipelines and opening an inert gas source connected with the heating furnace.
5. A heating furnace emergency interlocking device according to claim 4, characterized in that:
the memory and processor are integrated within a controller (8);
the heating furnace (1) is connected with the burner (3) through a heating valve (3-1) of the heating furnace;
the furnace body of the heating furnace (1) penetrates through the plurality of pipelines (2);
the heating furnace (1) is also connected with the inert gas source (4) through an inert gas valve (4-1);
the heating furnace (1) is respectively connected with a temperature sensor (7), a gas sensor (6) and a differential pressure sensor (5), the temperature sensor (7), the gas sensor (6) and the differential pressure sensor (5) are also connected with a controller (8)
The heating furnace (1) is used for heating the fluid in the pipelines (2);
the temperature sensor (7) is used for detecting the temperature in the flue of the heating furnace (1);
the gas sensor (6) is used for detecting the smoke components in the heating furnace (1);
-said differential pressure sensor (5) for detecting said pressure difference of the fluid in said several lines (2);
the pipeline valves (2-1) are arranged on the pipelines (2);
if one of the first judgment condition, the second judgment condition and the third judgment condition is met, the controller (8) gives an alarm;
if the first judgment condition, the second judgment condition and the third judgment condition are met simultaneously, the controller (8) controls the heating valve (3-1) of the heating furnace to be closed, the pipeline valve (2-1) to be closed and the inert gas valve (4-1) to be opened.
6. The utility model provides a heating furnace emergency interlocking control device which characterized in that includes:
the device comprises a detection unit, a first comparison unit, a second comparison unit, a third comparison unit and a control unit;
the detection unit is used for detecting the temperature and the smoke components in the flue of the heating furnace and the pressure difference of fluid in a plurality of pipelines penetrating through the heating furnace;
the first comparison unit compares the temperature with a set temperature, and if the temperature is greater than or equal to the set temperature, a first judgment condition is obtained;
the second comparison unit compares the sizes of the smoke component and a preset smoke component, and if the smoke component is greater than or equal to the preset smoke component, a second judgment condition is obtained;
the third comparison unit compares the pressure difference with a preset pressure difference, and if the pressure difference is greater than or equal to the preset pressure difference, a third judgment condition is obtained;
if one of the first judgment condition, the second judgment condition and the third judgment condition is met, the control unit gives an alarm;
when alarming, the heating furnace is manually operated to stop heating, fluid in a plurality of pipelines is cut off, and an inert gas source connected with the heating furnace is opened;
if the first judgment condition, the second judgment condition and the third judgment condition are met, the control unit automatically controls the heating furnace to stop heating, cut off the fluid in the pipelines and turn on an inert gas source connected with the heating furnace.
7. The utility model provides a heating furnace emergency interlocking control system, its characterized in that includes:
a heating furnace dangerous case emergency interlocking control method and/or according to any one of claims 1 to 3;
a heating furnace emergency interlocking control device according to claim 4 or 5 and/or;
the emergency interlocking control device for heating furnace in dangerous situation as claimed in claim 6.
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| CN101329110A (en) * | 2008-07-14 | 2008-12-24 | 深圳市佳运通电子有限公司 | Full-automatic control system of oil field heating furnace |
| CN202614004U (en) * | 2012-03-30 | 2012-12-19 | 中冶南方工程技术有限公司 | Cooling water leakage and blockage detecting device of heating furnace |
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Effective date of registration: 20240312 Address after: 1-3 Jinshan Wujiaohua Wholesale Mall, No.14 Zhongqiao Road, Saltu District, Daqing City, Heilongjiang Province, 163000 yuan Patentee after: Daqing Keyue Petroleum Technology Co.,Ltd. Country or region after: China Address before: 163453 Aolin International Apartment Commercial Zone G Commercial Service Center A Commercial Service 1428, Ranghulu District, Daqing City, Heilongjiang Province Patentee before: DAQING HUAZHAN PETROLEUM TECHNOLOGY Co.,Ltd. Country or region before: China |