CN113090956A - Partitioned active explosion-proof and explosion-suppression device and control method thereof - Google Patents
Partitioned active explosion-proof and explosion-suppression device and control method thereof Download PDFInfo
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- CN113090956A CN113090956A CN202110356131.3A CN202110356131A CN113090956A CN 113090956 A CN113090956 A CN 113090956A CN 202110356131 A CN202110356131 A CN 202110356131A CN 113090956 A CN113090956 A CN 113090956A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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Abstract
The invention provides a zoned active explosion-proof and explosion-suppression device and a control method thereof. The active explosion-proof and explosion-suppression device of each subarea mainly comprises a detector, an explosion-proof device, an explosion-suppression device and a controller; the explosion-proof device of each subarea at least comprises four groups of spraying devices, and the explosion-proof device at least comprises an explosion suppressor. The explosion suppression device is provided with the explosion suppressor based on the double-film explosion principle, so that the response speed of the explosion suppressor is improved, and the stability and the reliability of the explosion suppression effect are guaranteed; the explosion-proof device innovatively utilizes the high-pressure rotational flow wind-water spraying device and the single-water nozzle to form an integrated explosion suppression and explosion prevention system; the zoning active explosion-proof and explosion-suppression device judges and analyzes the change condition of the external environment fed back by the detector, and ensures the reliability and stability of explosion-proof and explosion-suppression in the large-scale chemical production space.
Description
Technical Field
The invention relates to a zoned active explosion-proof and explosion-suppression device and a control method thereof, in particular to an active explosion-proof and explosion-suppression device suitable for fire and explosion prevention in coal chemical production and a control method thereof, and belongs to the technical field of coal chemical safety production.
Background
China is a large industrial country, large-scale limited space exists in industrial buildings and large-scale facilities, particularly in recent years, China vigorously develops safe, clean and efficient large-scale coal gasification technology, and breakthrough progress is made in the aspects of key technology, core equipment, major engineering and the like. The combustible gas dust explosion accidents in large-scale confined spaces such as industrial buildings, large-scale facilities and the like not only cause a great deal of economic loss and casualties, but also cause extremely bad social influence, and the research and development of the active explosion-proof and explosion-suppression device in the large-scale confined spaces, particularly in the coal gasification process, has great significance for the development of energy resources and the harmonious and stable society in China.
The explosion suppression means mainly comprises passive explosion suppression and active explosion suppression, the passive explosion suppression is mainly applied to combustible medium pipelines and coal mine tunnel systems and mainly comprises passive explosion suppression devices such as explosion suppression rock powder and explosion suppression water bags. The active explosion suppression mainly comprises inert gas explosion suppression and powder explosion suppression, is also applied to part of coal mines, mainly comprises an explosion suppressor, an ultrasonic atomizer and other devices, is influenced by factors such as response time, explosion suppression range and the like in a large-scale limited space, presents certain limitations, is single in the current explosion suppression measure, has insufficient secondary explosion suppression performance, is difficult to provide safety guarantee for industrial production in the large-scale limited space, and has fresh reports on related systematic explosion suppression devices and technologies in the aspects of explosion suppression and explosion prevention in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a partitioned active explosion-proof and explosion-suppression device and a control method thereof, wherein a gas-fog explosion-proof curtain formed by fine water fog and inert gas is utilized to partition a large space into relatively independent explosion-proof partitions, the explosion-proof and explosion-suppression work is completed by matching with a quick response explosion-suppression device in the center of the partition, the dangerous conditions of combustible gas and dust in the space can be comprehensively analyzed and judged, and explosion-proof and explosion-suppression measures are implemented according to the judgment result, so that the reliability and the accuracy are ensured, and the device is particularly suitable for active explosion-proof and explosion-suppression in large industrial production spaces.
In order to achieve the purpose, the invention provides a partitioned active explosion-proof and explosion-suppression device, which comprises a high-pressure gas pipe network 1, a water pipe network 9, a detector, an explosion-proof device, an explosion-suppression device and a controller; the high-pressure gas pipe network 1 and the water pipe network 9 are fixed at the top of a large space, the large space is divided into a plurality of explosion-proof and explosion-suppression subareas according to the protection areas of the explosion-proof device and the explosion-suppression device, and the high-pressure gas pipe network 1 is connected with the gas pipe network 9 through a pipe clamp and arranged in parallel;
the detector is respectively arranged at four corners of each explosion-proof and explosion-suppression subarea and comprises a flame sensor 2, a pressure sensor 3, a dust concentration sensor 4 and a dust concentration sensor H which are suspended in each explosion-proof and explosion-suppression subarea2Sensor 5, CO sensor 6, and CH4A sensor; the sensors of the detector in each explosion-proof and explosion-suppression subarea are respectively and electrically connected with the controller 22;
each explosion-proof and explosion-suppression subarea is provided with the explosion-proof device which comprises an air-water spraying device 10 and a single-water nozzle group 8; wherein, the wind-water spraying device 10 is respectively connected with the pipelines of the high-pressure gas pipe network 1 and the pipelines of the water pipe network 9 around each explosion-proof and explosion-suppression subarea; the wind-water spraying device 10 is perpendicular to the top of the large space; two groups of single-water nozzle groups 8 are respectively arranged on one pair of sides of each explosion-proof and explosion-suppression subarea, each group of single-water nozzle groups 8 comprises two single-water nozzles which form different angles with the horizontal direction and respectively aim at the middle part and the bottom part of the explosion-proof and explosion-suppression subarea space; the single water nozzle group 8 is communicated with a pipeline of the water pipe network 9, each air and water spraying device 10 and the single water nozzle group 8 are respectively provided with a control valve, the control valves are communicated with the corresponding pipeline of the water pipe network 9 and the pipeline of the high-pressure gas pipe network 1, and the control valves are electrically connected with the controller 22 and controlled by the controller 22; the outside of the wind-water spraying device 10 is a negative pressure entrainment rotational flow spraying cover which is of a trumpet-shaped structure, and a spiral guide vane 23 is arranged in the negative pressure entrainment rotational flow spraying cover.
The high-pressure gas pipeline network (1) is communicated with the high-pressure gas storage tank (7) through a high-pressure pipeline, the high-pressure gas storage tank (7) is communicated with the electromagnetic valve (12) through a high-pressure pipeline, and the electromagnetic valve (12) is communicated with the water storage tank (11) through a water pipe high-pressure pipeline.
The explosion suppression device is communicated with a pipeline of the high-pressure gas pipe network 1, the explosion suppression device at least comprises an explosion suppression device 13, and the explosion suppression device 13 comprises a first cavity 14, a powder storage chamber 15, a first rupture disk 16, a second cavity 17, a pressure relief pipe 18, a second electromagnetic valve 19, a second rupture disk 20 and a powder spray head 21; the top end of the first cavity 14 is connected with the pipeline of the high-pressure gas pipe network 1 through threads and is fixedly installed at the central position of each explosion-proof and explosion-suppression subarea, wherein the first cavity 14 is communicated with the pipeline of the high-pressure gas pipe network 1, and inert gas is stored in the first cavity 14; the powder storage chamber 15 is positioned at the lower end of the first cavity 14, and explosion suppression powder is filled in the powder storage chamber; the second cavity 17 is hermetically connected with the first cavity 14 through a flange, and the first rupture disk 16 is clamped between the first cavity 14 and the second cavity 17; one end of the pressure relief pipe 18 is welded on the side wall of the second cavity 17 and is respectively connected with the pressure sensor 3 and a second electromagnetic valve 19 of the control explosion suppressor through a three-way pipe; the powder spraying head 21 and the second rupture disk 20 are hermetically connected with the second cavity 17 through flanges.
The controller 22 comprises a processor, an input port, an output port, a power supply loop, a data feedback loop, a data judgment loop, an explosion suppressor control loop and an explosion-proof device control loop, wherein the processor is respectively electrically connected with the input port and the output port, and the input port is respectively connected with the flame sensor 2, the pressure sensor 3, the dust concentration sensor 4 and the H2Sensor 5, CO sensor 6, and CH4The sensor is electrically connected, and the output end of the sensor is respectively connected with the first electromagnetic valve 12 and the second electromagnetic valve 19.
Further, the two single water nozzles with different angles with the horizontal direction are single water nozzles with 30 degrees and 60 degrees with the horizontal direction respectively.
Further, the storage pressure of the second cavity 17 is less than that of the first cavity 14, and the storage pressure of the first cavity 14 is 4-8 times that of the second cavity 17; the action pressure of the second rupture disk 20 is smaller than that of the first rupture disk 16, and the action pressure of the first rupture disk 16 is 2-5 times that of the second rupture disk 20.
Further, the gas having chemical inertness stored in the high-pressure gas tank 7 is carbon dioxide.
A control method of a partitioned active explosion-proof and explosion-suppression device is based on the partitioned active explosion-proof and explosion-suppression device and specifically comprises the following steps:
the method comprises the following steps: data feedback: after the power supply circuit is started, the data feedback circuit starts to work, and the pressure sensor 3, the flame sensor 2, the dust concentration sensor 4 and the H are connected2Sensor 5, CO sensor 6, and CH4The sensors respectively feed back signals to a processor of the controller 22 in real time, and the processor displays the flowing pressure value, dust concentration value and H of the combustible medium in the space in real time2Concentration number, CO concentration number and CH4The change of the concentration value;
step two: the data judging circuit starts working when the dust concentration and H2Concentration, CO concentration or CH4The concentration feedback value does not exceed the limit value 1, the processor judges the concentration feedback value to be a low-risk signal, and the dust concentration and H in different areas are displayed on the display screen2Concentration, CO concentration and methane concentration values;
when dust concentration, H2When the feedback value of the concentration, the CO concentration or the methane concentration exceeds the limit value 1, the processor judges the feedback value to be a risk signal, and the controller 22 controls the buzzer to alarm;
when dust concentration, H2The feedback value of the concentration, the CO concentration or the methane concentration exceeds the limit value 2, the processor judges the feedback value to be a danger signal, and the dust concentration and the H concentration in different areas are displayed on the display screen2The processor controls the control valves of the water source and the gas source of the air-water spraying device 10 to be opened through the output port respectively according to the concentration, the CO concentration and the methane concentration, and the air-water spraying device10 spraying water mist and carbon dioxide inert gas in the vertical direction;
when the flame sensor 2 senses that a spark occurs or the pressure sensor 3 senses explosion overpressure, the second electromagnetic valve 19 of the explosion suppressor 13 is controlled to be opened through the output port, the second cavity 17 of the explosion suppressor 13 is decompressed, the first rupture disc 16 is ruptured, high-pressure gas rushing out of the first cavity 14 rushes out the second rupture disc 20 and drives the explosion suppressor in the powder storage chamber 15 to be sprayed out from the powder spraying head 21 to form an explosion suppression powder curtain, and the high-pressure gas rushing out of the first cavity 14 rushes out the second rupture disc 20 and drives the explosion suppressor in the powder storage chamber 15 to be sprayed out from the powder spraying head 21 to form the explosion suppression powder curtain, so that flame is extinguished and explosion is suppressed;
meanwhile, the processor starts the explosion-proof and explosion-suppression subareas and the wind-water spraying devices 10 of the adjacent explosion-proof and explosion-suppression subareas to form a fog-gas explosion-proof curtain formed by fine water fog and inert gas, so that flame of primary explosion and secondary explosion is prevented from spreading to surrounding areas; the processor controls the electromagnetic valve through the output end, and the single-water nozzle group 8 sprays water mist to the explosion-proof and explosion-suppression subarea, so that the concentration of the water mist in the area is increased while the concentration of the dust is further reduced, and the secondary explosion of combustible gas/dust is prevented.
As a further improvement of the present invention, in the second step, the limit value 1 causes the processor to determine that the dust concentrations of the combustible gas as the risk signals are respectively: the concentrations of methane, hydrogen and carbon monoxide were 1% and the dust concentration was 10g/m3(ii) a The limit value 2 makes the processor judge that the dust concentration of the combustible gas as a danger signal is respectively as follows: the concentrations of methane, hydrogen and carbon monoxide were 2% respectively, and the dust concentration was 20mg/m3。
The invention has the beneficial effects that:
1. the invention carries out zoning treatment on explosion prevention and explosion suppression of a large space, effectively monitors the migration state and concentration change condition of the combustible medium in an explosion prevention and explosion suppression area, can realize the aim of inerting the combustible medium which reaches the explosion limit but is not ignited to prevent explosion, and can also realize the aim of inhibiting flame and blocking flame propagation when the combustible medium explodes. The method overcomes the defects that the prior art does not have the characteristics of gas explosion prevention, difficult synchronization and even delay of the release time of the inhibitor and the arrival time of the explosion flame, continuous release of the inhibitor and difficult inhibition of subsequent explosion flame;
2. according to the invention, a zoning combustible medium concentration sensor is adopted to track and monitor the change rule of the concentration of a combustible medium in a large space in real time, an alarm is started to give an early warning when the fact that an explosion risk is about to occur in a region is detected, a high-pressure inerting fine water mist explosion-proof device is quickly started when the fact that the concentration of the combustible medium in the region is further increased is detected, a spray hood is arranged outside the wind-water spray device, the wind-water spray device has the effects of small spray droplet particle size and strong negative pressure entrainment capacity, a regional explosion-proof mist-air curtain is formed by a wind-water nozzle to prevent the combustible medium from diffusing and exploding, meanwhile, guide vanes are arranged inside the wind-water spray hood, a negative pressure entrainment structure is formed inside the wind-water spray hood to circularly inerte the combustible gas in the surrounding region, the dust concentration is;
3. the invention adopts the explosion pressure and the flame sensor to cooperatively detect the explosion condition of the combustible medium in the space, and has the function of quickly detecting the explosion in the space; the explosion sensor controls the double-membrane explosion type pressure storage type explosion suppressor, the explosion suppressor can rapidly open the explosion sheet under the control of the electromagnetic valve, the response time is within 20ms, the storage is stable, the performance is reliable, explosion suppression powder can be sprayed out when flame is in a development stage, and the problem of long response time of a common explosion suppressor is effectively solved;
4. the two sides of the explosion suppression area are respectively provided with a group of single water nozzle groups with different injection angles, after the explosion suppressor is started and injects the explosion suppression agent to the explosion suppression subarea, fine water droplets are uniformly injected into the space, and continuously diffuse and move in the space containing the combustible medium along with the movement of the air flow, so that the combustible dust is captured on the basis of further extinguishing an ignition source, the dust concentration is reduced, the explosiveness of the combustible gas is inerted, and the occurrence of secondary explosion is prevented.
Drawings
Fig. 1 is a schematic layout diagram of a partitioned active explosion-proof and explosion-suppression device provided in an embodiment of the present invention.
Fig. 2A and fig. 2B are schematic structural diagrams of an explosion suppressor of a partitioned active explosion-proof explosion suppression device provided in the embodiment of the invention.
Fig. 3 is a schematic structural diagram of an explosion-proof device of a partitioned active explosion-proof and explosion-suppression device provided in the embodiment of the invention.
Fig. 4 is a schematic flow chart of a spatially partitioned explosion-proof and explosion-suppression method provided in an embodiment of the present invention.
In the figure: 1-high pressure gas pipe network; 2-a flame sensor; 3-a pressure sensor; 4-dust concentration sensor; 5-H2A sensor; a 6-CO sensor; 7-a high-pressure gas storage tank; 8-single water nozzle group; 9-water pipe network; 10-wind and water spraying device; 11-a water storage tank; 12-a first electromagnetic valve; 13-a suppressor; 14-a first cavity; 15-a powder storage chamber; 16-rupture disk one; 17-a second cavity; 18-a pressure relief tube; 19-electromagnetic valve II; 20-rupture disk II; 21-a powder spray head; 22-a controller; 23-helical guide vanes.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
It is to be understood that the appended drawings are not to scale, but are merely drawn with appropriate simplifications to illustrate various features of the basic principles of the invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, locations, and configurations, will be determined in part by the particular intended application and use environment.
In the several figures of the drawings, identical or equivalent components (elements) are referenced with the same reference numerals.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The invention provides a zoned active explosion-proof and explosion-suppression device and a control method thereof.
Fig. 1 is a schematic layout diagram of a partitioned active explosion-proof and explosion-suppression device provided in an embodiment of the present invention. As shown in fig. 1, the zoning active explosion-proof and explosion-suppression device comprises a high-pressure gas pipe network 1, a water pipe network 9, a detector, an explosion-proof device, an explosion-suppression device and a controller. The high-pressure gas pipe network 1 and the water pipe network 9 are fixed at the top of the large space, the large space is divided into a plurality of explosion-proof and explosion-suppression subareas according to the protection areas of the explosion-proof device and the explosion-suppression device, and the high-pressure gas pipe network 1 is connected with the gas pipe network 9 through a pipe clamp and arranged in parallel.
The detector is respectively arranged at four corners of each explosion-proof and explosion-suppression subarea and comprises a flame sensor 2, a pressure sensor 3, a dust concentration sensor 4 and a dust concentration sensor H which are suspended in each explosion-proof and explosion-suppression subarea2Sensor 5, CO sensor 6, and CH4A sensor.
Wherein, the dust concentration sensor 4, H2Sensor 5, CO sensor 6, and CH4The sensor is a combustible medium concentration sensor; the flame sensor 2, the pressure sensor 3 and the explosion suppression device are arranged at the center of each explosion-proof and explosion-suppression subarea, each sensor of the detector in each explosion-proof and explosion-suppression subarea is electrically connected with the controller 22, and the explosion suppression device is communicated with the pipeline of the high-pressure gas pipe network 1.
Fig. 3 is a schematic structural diagram of an explosion-proof device of a partitioned active explosion-proof and explosion-suppression device provided in the embodiment of the invention. As shown in fig. 3, each explosion-proof and explosion-suppression subarea is provided with the explosion-proof device which comprises an air-water spraying device 10 and a single-water nozzle group 8; wherein, the wind-water spraying device 10 is respectively connected with the pipelines of the high-pressure gas pipe network 1 and the pipelines of the water pipe network 9 around (front, back, left and right) each explosion-proof and explosion-suppression subarea. The wind and water spraying device 10 is perpendicular to the top of the large space.
Two groups of single-water nozzle groups 8 are respectively arranged on a pair of edges (front and back) of each explosion-proof and explosion-suppression subarea, each group of single-water nozzle groups 8 comprises two single-water nozzles which form different angles with the horizontal direction and are respectively aligned with the middle part and the bottom of the space of the explosion-proof and explosion-suppression subarea, the single-water nozzle groups 8 are communicated with the pipeline of the water pipe network 9, each wind-water spraying device 10 and each single-water nozzle group 8 are respectively provided with a control valve, the control valves are communicated with the pipeline of the corresponding water pipe network 9 and the pipeline of the high-pressure gas pipe network 1, and the control valves are electrically connected with the controller 22 and controlled by the controller 22.
Specifically, the two single water nozzles with different angles from the horizontal direction are respectively 30 degrees and 60 degrees from the horizontal direction, the single water nozzle with 30 degrees from the horizontal direction is aligned to the middle of the space of the explosion-proof and explosion-suppression subarea, the single water nozzle with 60 degrees from the horizontal direction is aligned to the bottom of the space of the explosion-proof and explosion-suppression subarea, the negative pressure entrainment rotational flow spray cover is arranged outside the wind-water spraying device 10 and is of a horn-shaped structure, and the spiral guide vanes 23 are arranged in the negative pressure entrainment rotational flow spray cover.
The high-pressure gas pipeline network (1) is communicated with the high-pressure gas storage tank (7) through a high-pressure pipeline, the high-pressure gas storage tank (7) is communicated with the electromagnetic valve (12) through a high-pressure pipeline, and the electromagnetic valve (12) is communicated with the water storage tank (11) through a water pipe high-pressure pipeline.
Fig. 2A and fig. 2B are schematic structural diagrams of an explosion suppressor of a partitioned active explosion-proof explosion suppression device provided in the embodiment of the invention. As shown in fig. 2A and 2B, the explosion suppression device at least comprises an explosion suppressor 13, and the explosion suppressor 13 comprises a first cavity 14, a powder storage chamber 15, a first rupture disk 16, a second cavity 17, a pressure relief pipe 18, a second electromagnetic valve 19, a second rupture disk 20 and a powder spray head 21; the top end of the first cavity 14 is connected with a pipeline of the high-pressure gas pipe network 1 through threads and is fixedly installed at the central position of each explosion-proof and explosion-suppression subarea, wherein the first cavity 14 is communicated with the pipeline of the high-pressure gas pipe network 1, and high-pressure inert gas capable of reducing combustible dust and gas explosiveness is stored in the first cavity 14; the powder storage chamber 15 is positioned at the lower end of the first cavity 14, and explosion suppression powder capable of preventing explosion propagation is filled in the powder storage chamber; the second cavity 17 is hermetically connected with the first cavity 14 through a flange, and the first rupture disk 16 is clamped between the first cavity 14 and the second cavity 17; one end of the pressure relief pipe 18 is welded on the side wall of the second cavity 17 and is respectively connected with the pressure sensor 3 and a second electromagnetic valve 19 of the control explosion suppressor through a three-way pipe; the powder spraying head 21 and the second rupture disk 20 are hermetically connected with the second cavity 17 through flanges.
The storage pressure of the second cavity 17 is less than that of the first cavity 14, and the storage pressure of the first cavity 14 is 4-8 times that of the second cavity 17; the action pressure of the second rupture disk 20 is smaller than that of the first rupture disk 16, and the action pressure of the first rupture disk 16 is 2-5 times that of the second rupture disk 20; the gas with chemical inertia stored in the high-pressure gas storage tank 7 is carbon dioxide.
The controller 22 comprises a processor, an input port, an output port, a power supply loop, a data feedback loop, a data judgment loop, an explosion suppressor control loop and an explosion-proof device control loop, wherein the processor is respectively electrically connected with the input port and the output port, and the input port is respectively connected with the flame sensor 2, the pressure sensor 3, the dust concentration sensor 4 and the H2Sensor 5, CO sensor 6, and CH4The sensor is electrically connected, and the output end of the sensor is respectively connected with the first electromagnetic valve 12 and the second electromagnetic valve 19.
As shown in fig. 4, the partitioned explosion-proof and explosion-suppression device provided by the invention performs judgment and analysis according to the external environment change condition fed back by the detector, and controls the corresponding action of the explosion-proof and explosion-suppression device according to the judgment result.
When the partitioned explosion-proof and explosion-suppression device provided by the invention is installed in a large space for use, the data feedback loop starts to work after the power supply loop is started, and the dust concentration sensors 4 and H at four corners of each explosion-proof and explosion-suppression partition2Sensor 5, CO sensor 6, and CH4The sensors respectively feed back signals to a processor of the controller 22 in real time, and the processor displays the pressure value, the dust concentration value and H of the flowing air flow of the workshop in real time2Concentration number, CO concentration number and CH4The change of the concentration value;
when dust concentration, H2Concentration, CO concentration or CH4The concentration feedback value does not exceed the limit value 1, the processor judges the concentration feedback value to be a low-risk signal, and the dust concentration and H in different areas are displayed on the display screen2Concentration, CO concentration andCH4a concentration value; when dust concentration, H2Concentration, CO concentration or CH4The concentration feedback value exceeds the limit value 1, the processor judges the concentration feedback value is a risk signal, and the processor controls the buzzer to give an alarm; when dust concentration, H2Concentration, CO concentration or CH4The concentration feedback value exceeds the limit value 2, the processor judges the concentration feedback value to be a dangerous signal, and the dust concentration and H in different areas are displayed on the display screen2Concentration, CO concentration and CH4The controller 22 respectively controls the control valves of the air-water spraying device 10 communicated with the pipeline of the high-pressure gas pipe network 1 and the pipeline of the water pipe network 9 to be opened through the output ports, the air-water spraying device 10 sprays water mist and carbon dioxide inert gas in the vertical direction, the dust concentration is reduced, the explosiveness of combustible gas is inerted, the possibility of explosion is effectively reduced, a mist-gas explosion-proof curtain composed of superfine water mist and carbon dioxide is formed, and flame in an explosion area is prevented from spreading to the surrounding area; the negative pressure entrainment rotational flow spray cover absorbs combustible gas/dust in the space of the explosion-proof and explosion-suppression subareas, inerts the combustible gas, wets the combustible dust and reduces the concentration of a combustible medium.
The limit value 1 causes the processor to judge that the dust concentration of the combustible gas as a risk signal is respectively: the concentrations of methane, hydrogen and carbon monoxide are respectively 1 percent and the dust concentration is 10g/m3(ii) a The limit value 2 makes the processor judge that the dust concentration of the combustible gas as a danger signal is respectively as follows: the concentrations of methane, hydrogen and carbon monoxide are respectively 2 percent and the dust concentration is 20mg/m3。
When the feedback value of the concentration sensor does not exceed the set value, the processor monitors the combustible gas/dust in real time according to the set degree, and displays the airflow direction and the dynamic change of the concentration of the combustible gas dust in each region; when the feedback value of the concentration sensor exceeds a set value 1, the processor judges that the concentration sensor is a risk signal, the controller starts a buzzer to alarm, related personnel is reminded to stop the machine for ventilation maintenance, the concentration change dynamic of combustible gas in each area is monitored and calculated on a display, and a leakage source is determined in an auxiliary mode; when the feedback value of the concentration sensor is further increased and exceeds the set value 2, the processor judges that the signal is a dangerous signal, the controller controls the water source control valve and the water source control valve of the air-water nozzle to be opened respectively through the output port, the air-water spraying device sprays water mist in the vertical direction to form a partitioned explosion-proof mist belt, the negative pressure rotational flow entrainment structure absorbs combustible gas/dust in the space, inerts the combustible gas, wets the combustible dust and reduces the concentration of the combustible medium.
When the flame sensor 2 at the center of the explosion-proof and explosion-suppression subarea senses the occurrence of sparks or the pressure sensor 3 senses explosion overpressure, an inductive signal directly controls the opening of an electromagnetic valve of a pressure relief pipe 18 of the explosion suppressor 13 through an output port, the second cavity 17 of the explosion suppressor 13 is quickly decompressed, the first rupture disk 16 is ruptured under the influence of internal and external pressure difference, high-pressure gas rushing out from the first cavity 14 breaks the second rupture disk 20 and drives an explosion suppressor in the powder storage chamber 15 to be sprayed out from a powder spraying head 21 to form an explosion-suppression powder curtain, and flames are extinguished and explosion is suppressed; meanwhile, the processor detects an opening signal of the pressure relief pipe 18, the control valve of the air-water spraying device 10 communicated with the explosion region and the adjacent region is controlled to be opened through the output end, the air-water spraying device 10 sprays carbon dioxide and fine water mist in the vertical direction to form a mist-gas explosion-proof curtain coupling the fine water mist and inert gas, and flame of primary explosion and secondary explosion is prevented from being transmitted to the surrounding region; the processor is connected with a control valve of the single-water nozzle group 8 through an output end in a control mode, the single-water nozzle group 8 sprays water mist to the middle space and the lower space of the explosion-proof and explosion-suppression subarea, the concentration of the water mist in the area is increased while the concentration of dust is further reduced, and secondary explosion of combustible gas/dust is prevented.
In order to enable the explosion-proof and explosion-suppression device to better match with actual conditions on site, the control system is provided with a manual operation interface, can adjust a set numerical value and manually controls and controls the control valves of the air-water spraying device and the single-water nozzle group to act.
The above description of exemplary embodiments has been presented only to illustrate the technical solution of the invention and is not intended to be exhaustive or to limit the invention to the precise form described. Obviously, many modifications and variations are possible in light of the above teaching to those skilled in the art. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to thereby enable others skilled in the art to understand, implement and utilize the invention in various exemplary embodiments and with various alternatives and modifications. It is intended that the scope of the invention be defined by the following claims and their equivalents.
Claims (7)
1. A zoning active explosion-proof and explosion-suppression device is characterized by comprising a high-pressure gas pipe network (1), a water pipe network (9), a detector, an explosion-proof device, an explosion-suppression device and a controller; the high-pressure gas pipe network (1) and the water pipe network (9) are fixed at the top of a large space, the large space is divided into a plurality of explosion-proof and explosion-suppression subareas according to the protection areas of the explosion-proof device and the explosion-suppression device, and the high-pressure gas pipe network (1) is connected with the gas pipe network (9) through a pipe clamp and arranged in parallel;
the detector is arranged at four corners of each explosion-proof and explosion-suppression partition respectively, and comprises a flame sensor (2), a pressure sensor (3) and a combustible medium concentration sensor which are suspended in each explosion-proof and explosion-suppression partition; the sensors of the detector in each explosion-proof and explosion-suppression subarea are respectively and electrically connected with the controller (22);
each explosion-proof and explosion-suppression subarea is provided with the explosion-proof device which comprises a wind-water spraying device (10) and a single-water nozzle group (8); wherein, the wind-water spraying device (10) is respectively connected with the pipelines of the high-pressure gas pipe network (1) and the pipelines of the water pipe network (9) around each explosion-proof and explosion-suppression subarea; the wind-water spraying device (10) is vertical to the top of the large space; two groups of single-water nozzle groups (8) are respectively arranged on one pair of sides of each explosion-proof and explosion-suppression subarea, each group of single-water nozzle groups (8) comprises two single-water nozzles which form different angles with the horizontal direction and respectively aim at the middle part and the bottom part of the space of the explosion-proof and explosion-suppression subarea; the single water nozzle group (8) is communicated with a pipeline of a water pipe network (9), each wind and water spraying device (10) and the single water nozzle group (8) are respectively provided with a control valve, the control valves are communicated with the pipeline of the corresponding water pipe network (9) and the pipeline of the high-pressure gas pipe network (1), and the control valves are electrically connected with the controller (22) and controlled by the controller (22); the outside of the wind-water spraying device (10) is provided with a negative pressure entrainment rotational flow spraying cover which is of a trumpet-shaped structure, and a spiral guide vane (23) is arranged in the negative pressure entrainment rotational flow spraying cover;
the high-pressure gas pipe network (1) is communicated with a high-pressure gas storage tank (7) through a high-pressure pipeline, the high-pressure gas storage tank (7) is communicated with an electromagnetic valve (12) through a high-pressure pipeline, and the electromagnetic valve (12) is communicated with a water storage tank (11) through a water pipe high-pressure pipeline; the explosion suppression device is communicated with a pipeline of the high-pressure gas pipe network (1), the explosion suppression device at least comprises an explosion suppressor (13), and the explosion suppressor (13) comprises a first cavity (14), a powder storage chamber (15), a first rupture disc (16), a second cavity (17), a pressure relief pipe (18), a second electromagnetic valve (19), a second rupture disc (20) and a powder spraying head (21); the top end of the first cavity (14) is connected with a pipeline of the high-pressure gas pipeline network (1) through threads and is fixedly arranged at the central position of each explosion-proof and explosion-suppression subarea, wherein the first cavity (14) is communicated with the pipeline of the high-pressure gas pipeline network (1), and inert gas is stored in the first cavity (14); the powder storage chamber (15) is positioned at the lower end of the first cavity (14), and explosion suppression powder is filled in the powder storage chamber; the second cavity (17) is hermetically connected with the first cavity (14) through a flange, and the first rupture disk (16) is clamped between the first cavity (14) and the second cavity (17); one end of a pressure relief pipe (18) is welded on the side wall of the second cavity (17) and is respectively connected with the pressure sensor (3) and a second electromagnetic valve (19) for controlling the explosion suppressor through a three-way pipe; the powder spraying head (21) and the second rupture disk (20) are hermetically connected with the second cavity (17) through flanges;
the controller (22) comprises a processor, an input port, an output port, a power supply loop, a data feedback loop, a data judgment loop, an explosion suppressor control loop and an explosion-proof device control loop, wherein the processor is respectively and electrically connected with the input port and the output port, the input port is respectively and electrically connected with the flame sensor (2), the pressure sensor (3) and the combustible medium concentration sensor, and the output end is respectively connected with the first electromagnetic valve (12) and the second electromagnetic valve (19);
the combustible medium concentration sensor comprises a dust concentration sensor (4) and H2Sensor (5), CO sensor (6), and CH4A sensor.
2. The zoned active explosion-proof and explosion-suppression apparatus according to claim 1, wherein the two single water nozzles having different angles from the horizontal direction are single water nozzles having angles of 30 ° and 60 ° from the horizontal direction, respectively.
3. The zoned active explosion-proof and explosion-suppression device according to claim 1 or 2, wherein the storage pressure of the first cavity (14) is 4-8 times that of the second cavity (17); the action pressure of the first rupture disk (16) is 2-5 times of that of the second rupture disk (20).
4. The zoned active explosion suppression device according to claim 1 or 2, wherein the gas with chemical inertness stored in the high pressure gas storage tank (7) is carbon dioxide.
5. The zoned active explosion suppression device according to claim 3, wherein the gas with chemical inertness stored in the high pressure gas tank (7) is carbon dioxide.
6. A control method of a partitioned active explosion-proof and explosion-suppression device is based on the partitioned active explosion-proof and explosion-suppression device of any one of claims 1 to 5, and specifically comprises the following steps:
the method comprises the following steps: data feedback: after the power supply loop is started, the data feedback loop starts to work, and the pressure sensor (3), the flame sensor (2), the dust concentration sensor (4) and the H sensor work2Sensor (5), CO sensor (6), and CH4The sensors respectively feed back signals to a processor of the controller (22) in real time, and the processor displays the flowing pressure value, dust concentration value and H of the combustible medium in the space in real time2Concentration number, CO concentration number and CH4The change of the concentration value;
step two: the data judging circuit starts working when the dust concentration and H2Concentration, CO concentration or CH4The concentration feedback value does not exceed the limit value 1, the processor judges the concentration feedback value to be a low-risk signal and displays the low-risk signal on the display screenShows the dust concentration H of different areas2Concentration, CO concentration and CH4A concentration value;
when dust concentration, H2Concentration, CO concentration or CH4The concentration feedback value exceeds the limit value 1, the processor judges the concentration feedback value is a risk signal, and the controller (22) controls the buzzer to alarm;
when dust concentration, H2Concentration, CO concentration or CH4The concentration feedback value exceeds the limit value 2, the processor judges the concentration feedback value to be a dangerous signal, and the dust concentration and H in different areas are displayed on the display screen2Concentration, CO concentration and CH4The processor controls control valves of a water source and a gas source of the air-water spraying device (10) to be opened through the output port, and the air-water spraying device (10) sprays water mist and carbon dioxide inert gas in the vertical direction;
when the flame sensor (2) senses that a spark occurs or the pressure sensor (3) senses explosion overpressure, the electromagnetic valve II (19) of the explosion suppressor (13) is controlled to be opened through the output port, the second cavity (17) of the explosion suppressor (13) is decompressed, the first rupture disk (16) is ruptured, high-pressure gas burst on the second rupture disk (20) in the first cavity (14) drives the explosion suppressor in the powder storage chamber (15) to be sprayed out from the powder spraying head (21) to form an explosion suppression powder curtain, and the high-pressure gas burst on the second rupture disk (20) in the first cavity (14) drives the explosion suppressor in the powder storage chamber (15) to be sprayed out from the powder spraying head (21) to form an explosion suppression powder curtain to extinguish flame and suppress explosion;
meanwhile, the processor starts the explosion-proof and explosion-suppression subareas and the wind-water spraying devices (10) of the adjacent explosion-proof and explosion-suppression subareas to form a fog-gas explosion-proof curtain formed by fine water fog and inert gas, so that flames of primary explosion and secondary explosion are prevented from being transmitted to surrounding areas; the processor controls the electromagnetic valve through the output end, and the single-water nozzle group (8) sprays water mist to the explosion-proof and explosion-suppression subarea, so that the concentration of the water mist in the area is increased while the concentration of the dust is further reduced, and the secondary explosion of combustible gas/dust is prevented.
7. The method for controlling a zoned active explosion-proof and explosion-suppression device according to claim 6, wherein in the second step, the limit value 1 enables the processor to judge the combustible gas powder as a risk signalThe dust concentrations were respectively: the concentrations of methane, hydrogen and carbon monoxide were 1% and the dust concentration was 10g/m3(ii) a The limit value 2 makes the processor judge that the dust concentration of the combustible gas as a danger signal is respectively as follows: the concentrations of methane, hydrogen and carbon monoxide were 2% respectively, and the dust concentration was 20mg/m3。
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