CN108443708B - Liquid ammonia security control method - Google Patents
Liquid ammonia security control method Download PDFInfo
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- CN108443708B CN108443708B CN201810216472.9A CN201810216472A CN108443708B CN 108443708 B CN108443708 B CN 108443708B CN 201810216472 A CN201810216472 A CN 201810216472A CN 108443708 B CN108443708 B CN 108443708B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/03—Control means
- F17C2250/036—Control means using alarms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0447—Composition; Humidity
- F17C2250/0452—Concentration of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/036—Avoiding leaks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/037—Handling leaked fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/042—Reducing risk of explosion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/044—Avoiding pollution or contamination
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a liquid ammonia security control method, which comprises the steps of when DCS is normally controlled, when a liquid ammonia security control system is in an automatic state, when a liquid ammonia gas alarm instrument detects that the concentration of liquid ammonia reaches a set alarm high limit value E, F, alarming to reach a set alarm high limit value G, H, or alarming to reach a set alarm high limit value I, J when the pressure of liquid ammonia reaches a set alarm high limit value M, N, opening an exhaust fan interlock, a spraying system interlock, an induced air emergency interlock, a liquid ammonia pressure tank interlock and an axial flow fan matching interlock. Above-mentioned arbitrary equal manually operation of operation, it is higher when indoor temperature, can manually open spray system and carry out manual cooling, when DCS unusual or during entire system power-off state, liquid ammonia security control system can open and spray emergency system, spray emergency system and can manually carry out one-key formula when unusual and spray emergency system, and above-mentioned control method does benefit to liquid ammonia storage, safety protection and emergency control operation, liquid ammonia safety protection and emergency control in being fit for liquid ammonia production.
Description
Technical Field
The invention relates to a control method for production and storage of liquid ammonia in the technical field of industrial liquid ammonia production processes, in particular to a safety protection and emergency control method for liquid ammonia in liquid ammonia production.
Background
At present, the known liquid ammonia production technology is mature. Liquid ammonia is mainly used for nitric acid, urea and other chemical fertilizers, can be used as raw materials of medicines and pesticides, and can also be used as a refrigerant. At present, as a plurality of refrigeration storage equipment and a complex refrigeration process are adopted, the demand for liquid ammonia is increasingly increased, ammonia is gaseous at normal temperature, the ammonia is cooled to minus 33.4 ℃ at normal pressure or pressurized to 1.554MPa at normal temperature to be converted into liquid, when leakage occurs, part of liquid ammonia is rapidly gasified and diffused into air, both the liquid ammonia and the ammonia belong to highly toxic gases, and the vapor and the air are mixed to easily form an explosive mixture, so that the air is polluted, explosion is likely to occur, and serious personnel and economic losses are caused. The safety production and leakage of liquid ammonia and the safety and emergency problems of liquid ammonia storage are more prominent in the production process. The real-time monitoring system of liquid ammonia or ammonia is mostly controlled by a DCS distributed control system, and the DCS distributed control system is composed of hardware and software, wherein the hardware comprises a field control station, an operation station, an engineer station, a communication network cable and the like; the software comprises an operating system platform and DCS configuration software for industrial control, the DCS hardware configuration and the software configuration are different, and the ammonia concentration monitoring and alarming, the ammonia gas alarm instrument and the spraying system interlocking and the safety control of the liquid ammonia emergency pouring tank are very important. The problems that exist at present are:
1. the volatile vaporization property of the liquid ammonia and the convenience of transportation and storage of the liquid ammonia compared with gas are easy, and serious consequences can be caused if the liquid ammonia leaks, easily causes combustion explosion or toxic accidents and is carelessly handled;
2. liquid ammonia is easy to pollute the environment, and secondary explosion occurs when the liquid ammonia is contacted under high-temperature conditions, so that the disposal and cooling difficulty is very high;
3. when the power is cut off instantly, and the UPS is completely powered off at the moment, the complex control system usually opens all the valves or is in an unknown state when the power is cut off, so that a large amount of ammonia gas can be caused to flow out, and loss and potential safety hazard which cannot be estimated can occur.
Disclosure of Invention
The invention aims to provide a control method which is beneficial to the storage, safety protection and emergency control operation of liquid ammonia and is suitable for the safety protection and emergency of the liquid ammonia in the production of the liquid ammonia.
A liquid ammonia security control method comprises the steps that when DCS is normally controlled, a liquid ammonia security control system is in an automatic state, when a liquid ammonia gas alarm instrument detects that the concentration of liquid ammonia reaches a set alarm high limit value E, F, an alarm is given, the set alarm high limit value G, H is reached, and an exhaust fan interlock, a spraying system interlock, an induced air emergency system interlock, a liquid ammonia storage tank interlock and an axial flow fan matching interlock are opened. When the control system is automatically put into use, the DCS controls the opening of the exhaust fan, the opening of the spraying system, the opening of the induced air emergency system, the opening of the liquid ammonia storage tank system and the matched opening of the axial flow fan. When the liquid ammonia pressure reaches a set alarm high limit value I, J for alarm, and reaches a set alarm high limit value M, N, an exhaust fan interlock, a spraying system interlock, an induced air emergency system interlock, a liquid ammonia storage tank interlock and an axial flow fan matching interlock are opened; when the control system is automatically put into operation, the DCS controls the opening of the exhaust fan, the opening of the spraying system, the opening of the induced air emergency system, the selective opening of the liquid ammonia storage tank system and the matched opening of the axial flow fan; any one of the operations can be manually operated, and the exhaust fan interlocking, the spraying system interlocking, the induced draft emergency system interlocking, the liquid ammonia storage tank selective interlocking and the axial flow fan matching interlocking can be manually opened and stopped. When the indoor temperature is higher, the spraying system can be manually opened to carry out manual cooling; when DCS is abnormal or the whole system is in a power-off state, the liquid ammonia security control system can start the spraying system, and the spraying system can be manually started in one key mode in the abnormal state.
According to the liquid ammonia security control method, a high limit value E, F and a high limit value G, H of a detection value of a liquid ammonia gas alarm are preset, a high limit value I, J of a detection value of a remote transmission pressure gauge is preset, and a high limit value M, N of a detection value of the remote transmission pressure gauge is preset.
According to the liquid ammonia security control method, when the DCS is normally controlled, the liquid ammonia security control system is in an automatic state, when the liquid ammonia gas alarm instrument detects that the concentration of liquid ammonia reaches the set alarm high limit value E, F, an alarm is given, and when the concentration of liquid ammonia reaches the set alarm high limit value G, H, the exhaust fan interlock, the spraying system interlock, the induced air emergency system interlock, the liquid ammonia storage tank selective interlock and the axial flow fan matching interlock are opened; when the control system is automatically put in, the DCS controls the exhaust fan to be opened, the spraying water automatic control valve of the spraying system is opened, the spraying water pump is opened, and the lower-layer spraying S-shaped coil automatic control valve is opened; the automatic control valve of the upper spraying S-shaped coil pipe is opened, the automatic control valve of the feeding of the underground liquid ammonia tank in the induced air emergency system is opened, the liquid ammonia emergency pump is opened, and the liquid level of the liquid ammonia emergency tank is more than one half of the depth of the emergency tank; the liquid ammonia storage tank system can selectively open a liquid ammonia storage tank automatic control valve, a liquid ammonia storage tank compressor and a liquid ammonia storage tank feeding automatic control valve to carry out emergency tank pressing and inverting operation; the blowing axial flow fan is matched with the blowing axial flow fan and is started simultaneously.
According to the liquid ammonia security control method, when the DCS is normally controlled, the liquid ammonia security control system is in an automatic state, when the pressure of liquid ammonia reaches the set alarm high limit value I, J, an alarm is given, when the pressure of liquid ammonia reaches the set alarm high limit value M, N, an exhaust fan interlocking, a spraying system interlocking, an induced air emergency system interlocking, a liquid ammonia storage tank selective interlocking and an axial flow fan matching interlocking are started. When the control system is automatically put into operation, the DCS controls the exhaust fan to be started, the spraying water automatic control valve of the spraying system is started, the spraying water pump is started, the lower-layer spraying S-shaped coil automatic control valve is started, the upper-layer spraying S-shaped coil automatic control valve is started, the induced air emergency system meets the conditions, meanwhile, the liquid level of the liquid ammonia emergency tank is larger than one half of the depth of the emergency tank, the feeding automatic control valve of the underground liquid ammonia tank is started, the liquid ammonia emergency pump is started, the liquid ammonia tank system can selectively start the liquid ammonia tank automatic control valve, the liquid ammonia tank compressor and the liquid ammonia tank feeding automatic control valve to carry out emergency tank pressing and inverting operation; the blowing axial flow fan is matched with the blowing axial flow fan and is started simultaneously.
According to the liquid ammonia security control method, when the DCS is normally controlled, the liquid ammonia security control system is in a manual state, any one of the operations can be manually operated, and the exhaust fan interlocking, the spraying system interlocking, the induced air emergency system interlocking, the liquid ammonia storage tank selective interlocking and the axial flow fan matching interlocking can be manually started and stopped.
According to the liquid ammonia security control method, when the indoor temperature is high, the spraying system can be manually opened to carry out manual spraying and cooling, the spraying water automatic control valve of the spraying system is opened, the spraying water pump is opened, the lower-layer spraying S-shaped coil automatic control valve is opened, and the upper-layer spraying S-shaped coil automatic control valve is opened.
According to the liquid ammonia security control method, when the DCS is abnormal or the whole system is in a power-off state, the liquid ammonia security control system can start the spraying system, if the DCS cannot be automatically started due to the abnormality, the spraying system can be manually switched on and off by one key, the emergency automatic control valve of the head tank is opened by the spraying emergency switch, and the-35 ℃ chilled brine in the spraying water emergency head tank is used for spraying, absorbing and leaking ammonia gas and reducing the temperature through the ejector.
According to the liquid ammonia security control method, the liquid level of the liquid ammonia emergency tank in the induced air emergency system is larger than one half of the depth of the liquid ammonia emergency tank, and meanwhile, the liquid level is additionally provided with remote level meter indication, liquid level alarm and interlocking.
The liquid ammonia security control method is characterized in that the spraying water emergency elevated tank is frozen brine with the temperature of minus 35 ℃ and is used for spraying and absorbing leaked ammonia gas and simultaneously cooling the system.
The device for the liquid ammonia security control method mainly comprises the liquid ammonia storage room, a trench cofferdam, a liquid ammonia storage room ground, a liquid ammonia storage tank (A/B/C/D), an exhaust fan system, a spraying system, an induced air emergency system, a liquid ammonia storage tank system, an axial flow fan system and a spraying system. The liquid ammonia gas alarm instrument and the storage tank remote transmission pressure gauge are used for detecting abnormity in real time, the security control device is started according to set conditions when the liquid ammonia security control system is normal, and the liquid ammonia security control system can start the spraying system when the DCS is abnormal or the whole system is in a power-off state.
The liquid ammonia storehouse is provided with the trench cofferdam in, liquid ammonia storehouse ground, liquid ammonia basin (AB/C/D), basin teletransmission pressure gauge, basin and storehouse liquid ammonia gas alarm instrument, air discharge fan interlocking, sprinkler system interlocking, induced air emergency system, liquid ammonia basin system, axial fan system.
The exhaust fan system is provided with an exhaust fan and is located at a position where the liquid ammonia storage room is 3 meters away from the ground in the longitudinal direction and 6 meters away from the ground in the transverse direction.
The spraying system is provided with an upper spraying S-shaped coil, a lower spraying S-shaped coil automatic control valve, an upper spraying S-shaped coil automatic control valve, a cross sprinkler, an upper spraying S-shaped coil located at the position of 1 meter of the longitudinal distance at the top of the liquid ammonia storage room, a lower spraying S-shaped coil located at the position of 1 meter of the longitudinal distance below the upper spraying S-shaped coil, a spraying S-shaped coil in the spraying system is arranged at each liquid ammonia storage tank (A/B/C/D) and the liquid ammonia storage tank, and a main spraying water pipeline and an upper spraying S-shaped coil, a lower spraying S-shaped coil, a liquid ammonia storage tank (A/B/C/D) and a liquid ammonia storage tank top S-shaped coil which can run to the spraying S-shaped coil automatic control valve in the spraying system after water is opened.
The air induction emergency system is provided with an air induction emergency pipeline, a liquid ammonia air induction emergency pump and an underground liquid ammonia tank feeding automatic control valve, wherein one end of the air induction emergency pipeline leads to the liquid ammonia storage room, the other end of the air induction emergency pipeline is connected with the liquid ammonia air induction emergency pump, and the air induction emergency pipeline leads to the liquid ammonia emergency tank and is about 20 cm from the bottom of the liquid ammonia emergency tank below the liquid level.
The liquid ammonia storage tank system is provided with a liquid ammonia storage tank (A/B/C/D), a liquid ammonia storage tank pipeline, a liquid ammonia storage tank automatic control valve, a liquid ammonia storage tank compressor, a liquid ammonia storage tank feeding automatic control valve, a liquid ammonia storage tank standby tank, a standby tank remote transmission pressure gauge and a standby tank gas alarm instrument. Liquid ammonia basin (AB/C/D) emergent emission part and liquid ammonia basin pipe connection, through liquid ammonia basin automatic control valve, liquid ammonia basin compressor, liquid ammonia basin feeding automatic control valve is equipped with the jar to liquid ammonia basin, and liquid ammonia basin is equipped with jar body and is installed and is equipped with jar teletransmission pressure gauge, is equipped with jar gas alarm, and liquid ammonia basin is equipped with jar tank deck portion and is installed spraying water S type coil pipe, and spray water automatic control valve back spray header pipe links to each other with spray system in spray pump, spraying water automatic control valve.
The axial flow fan system is provided with a blowing axial flow fan and a suction axial flow fan. The blowing axial flow fan is arranged at the position 40 cm away from the ground at the lower end of one wall, and the suction axial flow fan is arranged at the position 200 cm away from the ground at the lower end of the wall opposite to the blowing axial flow fan.
The emergency system for spray water is provided with an emergency elevated tank for spray water, an emergency automatic control valve for the elevated tank, an ejector, a spray emergency switch, an emergency automatic control valve for the elevated tank is installed at the outlet of the emergency elevated tank for spray water, the ejector is provided with-35 ℃ frozen brine in the emergency elevated tank for spray water for absorbing leaked ammonia gas and cooling, the spray emergency switch is used for manually switching the emergency automatic control valve for the elevated tank by one key, the spray water emergency system is connected with a spray water main pipeline in the spray system, and a liquid ammonia storage tank (A/B/C/D) and a liquid ammonia storage tank are connected with a spray water pump and a spray water main pipeline in the spray system after an S-shaped coil pipe at the top of the liquid ammonia storage tank is connected with the spray water main pipeline. When the spraying system is abnormal, the elevated tank emergency automatic control valve is manually switched on and off by one key, and chilled brine at the temperature of-35 ℃ in the spraying water emergency elevated tank can run to a spraying water main pipeline, an upper spraying S-shaped coil pipe, a lower spraying S-shaped coil pipe, an liquid ammonia storage tank (A/B/C/D) and an S-shaped coil pipe at the top of a liquid ammonia storage tank after the spraying water automatic control valve in the spraying system.
The liquid ammonia storage room is internally provided with a liquid ammonia storage room ground, the angle of inclination of the liquid ammonia storage room ground from the center of the ground to the cofferdams at 15 degrees is convenient for spraying and overflowing, and the liquid ammonia storage room ground is subjected to antiseptic treatment.
The liquid ammonia storage room is internally provided with a trench cofferdam with the height of 50 cm and the width of 50 cm, the interior of the cofferdam is subjected to antiseptic treatment, and the cofferdam terminal is communicated with the liquid ammonia emergency tank and used for storing spraying overflow liquid and diversion liquid into the liquid ammonia emergency tank.
The upper spraying S-shaped coil automatic control valve is installed at the inlet of the upper spraying S-shaped coil, the lower spraying S-shaped coil automatic control valve is installed at the inlet of the lower spraying S-shaped coil, and the spraying water automatic control valve and the spraying water pump are installed at the inlet ends of the upper spraying S-shaped coil and the lower spraying S-shaped coil inlet main pipe.
The upper layer spraying S-shaped coil and the lower layer spraying S-shaped coil are provided with the cross sprinkler.
The cross shower head comprises a connecting pipe, a connecting pipe five-way, a shower head elbow, a shower head connector and a shower head. The connecting pipe is connected with the spray header pipe, the five-way connecting pipe is connected with the shower short circuit through a screw, the shower short circuit is connected with the shower elbow through a screw, the shower elbow is connected with the shower connector through a screw, and the shower connector and the shower nozzle are formed by connecting matched screws.
The five-way connecting pipe of the cross shower can be provided with 4 shower nozzles, and can spray at multiple angles so as to fully absorb and cool.
As above gondola water faucet connector one end gondola water faucet elbow pass through the silk mouthful and connect, the other end is connected by supporting silk mouthful with the gondola water faucet shower nozzle, the gondola water faucet connector have the short circuit sleeve, connect the lug, with silk cover welded connection, there is the through-hole short circuit sleeve inside.
The edge of the showerhead as described above is at a 15 degree angle to horizontal plane α for a full mist spray.
The potential safety hazard of liquid ammonia in liquid ammonia production is analyzed layer by layer, and the safety control exhaust fan interlocking, the spraying system interlocking, the induced air emergency system interlocking and the liquid ammonia storage tank interlocking control method are added to solve the potential safety hazard and safety protection emergency problems that the gas concentration in a liquid ammonia space exceeds the standard and the pressure of a storage tank exceeds the standard, the spraying system solves the problem that a large amount of ammonia enters the space due to the fact that all valves are closed or in an unknown state when a UPS is powered off at the moment of power failure, and the safety reliability is improved.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic view of a relevant process flow of a liquid ammonia security control method in example 1 of the present invention;
fig. 2 is a schematic flow chart of a cross shower head structure in the liquid ammonia security control device according to embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a shower head connector in the liquid ammonia security control device according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a shower head in the liquid ammonia security control device according to embodiment 1 of the present invention;
FIG. 5 is a schematic diagram of the control logic for a liquid ammonia storage tank in accordance with example 1 of the present invention;
in fig. 1, 1 is a liquid ammonia storage room; 2 is a trench cofferdam; 3, liquid ammonia storage room ground; 4 is a blowing axial flow fan; 5 is a liquid ammonia storage tank; 6 is a storage tank remote transmission pressure gauge; 7 is a liquid ammonia gas alarm instrument for a storage tank and a storage room; 8 is an upper spraying S-shaped coil pipe; 9 is a lower spraying S-shaped coil pipe; 10 is a cross shower head; 11 is a lower spraying S-shaped coil automatic control valve; 12 is an upper spraying S-shaped coil automatic control valve; 13 is an induced air emergency pipeline; 14 is an exhaust fan; 15 is an air suction axial flow fan; 16 is a liquid ammonia storage tank pipeline; 17 is a self-control valve of a liquid ammonia storage tank; 18 is a compressor of a liquid ammonia storage tank; 19 is a liquid ammonia storage tank feeding automatic control valve; 20 is a liquid ammonia storage tank; 21 is a standby tank remote transmission pressure gauge; 22 is a gas alarm of the standby tank; 23 is an underground liquid ammonia tank feeding automatic control valve; 24 is a liquid ammonia emergency tank; 25 is a liquid ammonia induced draft emergency pump; 26 is a spray water automatic control valve; 27 is a spray water pump; 28 is a spray water emergency elevated tank; 29 is a head tank emergency automatic control valve; 30 is an ejector; 31 is a spray emergency switch.
In fig. 2, 101 is a connection pipe; 102 is a connecting pipe five-way; 103 is a shower head elbow; 104 is a shower head connector; 105 is a shower nozzle; 106 is a short circuit of the shower head.
In fig. 3, 1041 is a thread bushing, 1042 is a connecting lug, 1043 is a short-circuit sleeve.
Detailed Description
Referring to the attached drawings 1-5, embodiment 1 of the invention is a liquid ammonia security control method, wherein when DCS is normally controlled, liquid ammonia gas concentration alarm high limit values E (120ppm) and F (35 LEL) are preset, alarm high limit values G (150ppm) and H (50 LEL) are set, high limit values I (1.4MPa) of detection values of two A/B remote transmission pressure gauges of an ammonia storage tank at 7 ℃ of a liquid ammonia storage tank, high limit values J (1.1MPa) of detection values of two C/D remote transmission pressure gauges of the ammonia storage tank at 35 ℃ are preset, high limit values M (1.6MPa) of detection values of two A/B remote transmission pressure gauges of the ammonia storage tank at 7 ℃ of the liquid ammonia storage tank and high limit values N (1.3MPa) of detection values of two C/D remote transmission pressure gauges of the ammonia storage tank at 35 ℃ are preset.
The liquid ammonia security control system is in an automatic state, when the liquid ammonia gas alarm instruments 7 and 22 detect that the concentration of liquid ammonia reaches set alarm high limit values E (120ppm) and F (35LEL%), the alarm is carried out, and set alarm high limit values G (150ppm) and H (50LEL%) are reached, and an exhaust fan interlock, a spraying system interlock, an induced air emergency system interlock, a liquid ammonia storage tank interlock and an axial flow fan matching interlock are opened. When the control system is automatically put into use, the DCS controls the opening of the exhaust fan 14, the opening of the spraying system, the opening of the induced air emergency system, the opening of the liquid ammonia storage tank system and the matched opening of the axial flow fan. When the liquid ammonia pressure reaches a set alarm high limit value I (1.4Mpa) and J (1.1Mpa), an exhaust fan interlock, a spraying system interlock, an induced air emergency system interlock, a liquid ammonia storage tank interlock and an axial flow fan matching interlock are opened when the liquid ammonia pressure reaches a set alarm high limit value M (1.6Mpa) and N (1.3 Mpa); when the control system is automatically put into operation, the DCS controls the opening of the exhaust fan 14, the opening of the spraying system, the opening of the induced air emergency system, the selective opening of the liquid ammonia storage tank system and the matched opening of the axial flow fan; any one of the operations can be manually operated, and the exhaust fan interlocking, the spraying system interlocking, the induced draft emergency system interlocking, the liquid ammonia storage tank selective interlocking and the axial flow fan matching interlocking can be manually opened and stopped. When the indoor temperature is higher, the spraying system can be manually opened to carry out manual cooling; when the DCS is abnormal or the whole system is in a power-off state, the liquid ammonia security control system starts the spraying system.
According to the liquid ammonia security control method, when the DCS is normally controlled, the liquid ammonia security control system is in an automatic state, when the liquid ammonia gas alarm instrument detects that the concentration of liquid ammonia reaches the set alarm high limit values E (120ppm) and F (35LEL%), an alarm is given, and when the concentration of liquid ammonia reaches the set alarm high limit values G (150ppm) and H (50LEL%), the exhaust fan interlock, the spraying system interlock, the induced air emergency system interlock, the liquid ammonia storage tank selective interlock and the axial flow fan matching interlock are opened. When the control system is automatically put into operation, the DCS controls the exhaust fan 14 to be started, the spraying water automatic control valve 26 of the spraying system to be started, the spraying water pump 27 is started, and the lower-layer spraying S-shaped coil automatic control valve 11 is started; starting an upper spraying S-shaped coil automatic control valve 12, and starting an underground liquid ammonia tank feeding automatic control valve 23 in the induced air emergency system; the liquid ammonia emergency pump 25 is started, and the liquid level of the liquid ammonia emergency tank 24 is larger than one half of the depth of the whole emergency tank; the liquid ammonia storage tank system can selectively open a liquid ammonia storage tank automatic control valve 17, a liquid ammonia storage tank compressor 18 and a liquid ammonia storage tank feeding automatic control valve 19 to carry out emergency tank pressing and inverting operation; the axial flow fan matching (blowing) 4 and the axial flow fan matching (blowing) 15 are started simultaneously.
According to the liquid ammonia security control method, when the DCS is normally controlled, the liquid ammonia security control system is in an automatic state, when the pressure of liquid ammonia reaches set alarm high limit values I (1.4MPa) and J (1.1MPa), an alarm is given, when the pressure of liquid ammonia reaches set alarm high limit values M (1.6MPa) and N (1.3MPa), an exhaust fan interlock, a spraying system interlock, an induced air emergency system interlock, a liquid ammonia storage tank selective interlock and an axial flow fan matching interlock are opened. When the control system is automatically put into operation, the DCS controls the exhaust fan 14 to be started, the spraying water automatic control valve 26 of the spraying system to be started, the spraying water pump 27 to be started, the spraying S-shaped coil automatic control valve 11 at the lower layer to be started and the spraying S-shaped coil automatic control valve 12 at the upper layer to be started, the induced air emergency system meets the conditions, and the liquid level of the liquid ammonia emergency tank 24 is more than one half; opening a feeding automatic control valve 23 of an underground liquid ammonia tank, opening a liquid ammonia emergency pump 25, and selectively opening a liquid ammonia storage tank automatic control valve 17, a liquid ammonia storage tank compressor 18 and a liquid ammonia storage tank feeding automatic control valve 19 of the liquid ammonia storage tank system to perform emergency tank pressing and inverting operation; the axial flow fan matching (blowing) 4 and the axial flow fan matching (blowing) 15 are started simultaneously.
According to the liquid ammonia security control method, when the DCS is normally controlled, the liquid ammonia security control system is in a manual state, any one of the operations can be manually operated, and the exhaust fan interlocking, the spraying system interlocking, the induced air emergency system interlocking, the liquid ammonia storage tank selective interlocking and the axial flow fan matching interlocking can be manually started and stopped.
According to the liquid ammonia security control method, when the indoor temperature is high, the spraying system can be manually opened to carry out manual spraying cooling, the spraying water automatic control valve 26 of the spraying system is opened, the spraying water pump 27 is opened, the lower-layer spraying S-shaped coil automatic control valve 11 is opened, and the upper-layer spraying S-shaped coil automatic control valve 12 is opened.
According to the liquid ammonia security control method, when the DCS is abnormal or the whole system is in a power-off state, the liquid ammonia security control system can start the spraying system, if the DCS cannot be automatically started due to the abnormality, the spraying system can be manually switched on and off by one key, the emergency automatic control valve 29 of the head tank is opened by the spraying emergency switch 30, and the freezing saline water with the temperature of-35 ℃ in the spraying water emergency head tank 28 is used for spraying and absorbing leaked ammonia gas and reducing the temperature through the ejector 30.
The liquid ammonia security control method comprises the steps that the liquid level of the liquid ammonia emergency tank 24 in the induced air emergency system is larger than one half of the depth of the whole emergency tank, and meanwhile, a remote liquid level meter is additionally arranged on the liquid level for indicating, alarming and interlocking.
The liquid ammonia security control method comprises the step of filling the spray water emergency elevated tank 28 with-35 ℃ frozen brine. Used for spraying and absorbing leaked ammonia gas and cooling the system at the same time.
The device for the liquid ammonia security control method mainly comprises a liquid ammonia storage room 1, a trench cofferdam 2 arranged in the liquid ammonia storage room, a liquid ammonia storage room ground 3, a liquid ammonia storage tank (A/B/C/D) 5, an exhaust fan system, a spraying system, an induced air emergency system, a liquid ammonia storage tank system, an axial flow fan system and a spraying system. The liquid ammonia gas alarm instrument 7 of the storage tank and the storage room and the storage tank remote transmission pressure gauge 6 detect abnormity in real time, the security control device is started according to set conditions when the liquid ammonia security control system is normal, and the liquid ammonia security control system can start the spraying system when the DCS is abnormal or the whole system is in a power-off state.
The liquid ammonia storage room 1 is internally provided with a trench cofferdam 2, a liquid ammonia storage room ground 3, a liquid ammonia storage tank (A/B/C/D) 5, a storage tank remote transmission pressure gauge 6, a storage tank and storage room liquid ammonia gas alarm instrument 7, an exhaust fan interlock, a spraying system interlock, an induced air emergency system, a liquid ammonia storage tank system and an axial flow fan system.
The exhaust fan system is provided with an exhaust fan 14 and is positioned at a position 3 meters away from the ground in the longitudinal direction of the liquid ammonia storage room 1, and the distance between the liquid ammonia storage room and the ground in the transverse direction is 6 meters;
the spraying system is provided with an upper-layer spraying S-shaped coil 8, a lower-layer spraying S-shaped coil 9, a lower-layer spraying S-shaped coil automatic control valve 11, an upper-layer spraying S-shaped coil automatic control valve 12 and a cross sprinkler 10, wherein the upper-layer spraying S-shaped coil 8 is positioned at the position of 1 meter in the longitudinal direction of the top of the liquid ammonia storage room 1, the lower-layer spraying S-shaped coil 9 is positioned at the position of 1 meter in the longitudinal direction below the upper-layer spraying S-shaped coil 8, the spraying S-shaped coil pipes in the spraying system are arranged on the tops of each liquid ammonia storage tank (A/B/C/D) 5 and the liquid ammonia storage tank 20, and a main spraying water pipeline and an upper spraying S-shaped coil pipe, a lower spraying S-shaped coil pipe, the liquid ammonia storage tank (A/B/C/D) 5 and the top S-shaped coil pipe of the liquid ammonia storage tank 20 can be operated to the spraying water automatic control valve 26 in the spraying system after water in the spraying system is started.
The induced air emergency system is provided with an induced air emergency pipeline 13, a liquid ammonia induced air emergency pump 2 and an underground liquid ammonia tank feeding automatic control valve 23, wherein one end of the induced air emergency pipeline 13 leads to the liquid ammonia storage room 1, the other end of the induced air emergency pipeline is connected with the liquid ammonia induced air emergency pump 2, and the distance between the induced air emergency pipeline and the bottom of the liquid ammonia emergency tank 24 is about 20 centimeters below the liquid level in the liquid ammonia emergency tank 24 through the underground liquid ammonia tank feeding automatic control valve 23.
The liquid ammonia storage tank system is provided with a liquid ammonia storage tank (A/B/C/D) 5, a liquid ammonia storage tank pipeline 16, a liquid ammonia storage tank automatic control valve 17, a liquid ammonia storage tank compressor 18, a liquid ammonia storage tank feeding automatic control valve 19, a liquid ammonia storage tank preparation tank 20, a tank remote transmission pressure gauge 21 and a tank gas alarm instrument 22, wherein an emergency discharge part of the liquid ammonia storage tank (A/B/C/D) 5 is connected with the liquid ammonia storage tank pipeline 16, and the liquid ammonia storage tank automatic control valve 17, the liquid ammonia storage tank compressor 18, the liquid ammonia storage tank feeding automatic control valve 19 and the liquid ammonia storage tank preparation tank 20 are connected with the tank body of the liquid ammonia storage tank 20, and the tank remote transmission pressure gauge 21 and the tank gas alarm instrument 22.
The axial flow fan system is provided with a blowing axial flow fan 4 and a suction axial flow fan 15. The blowing axial flow fan 4 is installed at a position 40 cm from the lower end of one wall to the ground, and the suction axial flow fan 15 is installed at a position 200 cm from the lower end of the wall opposite to the blowing axial flow fan 4 to the ground.
The spraying system is provided with a spraying water emergency elevated tank 28, an elevated tank emergency automatic control valve 29, an injector 30 and a spraying emergency switch 31, wherein the elevated tank emergency automatic control valve 29 is installed at the outlet of the spraying water emergency elevated tank 28, the injector 30 is provided with-35 ℃ frozen brine in the spraying water emergency elevated tank 28 for spraying and absorbing leaked ammonia gas and cooling, and the spraying emergency switch 31 is used for manually switching the elevated tank emergency automatic control valve 29 by one key. The spraying system is connected with a main spraying water pipeline in the spraying system, and an S-shaped coil pipe at the top of the liquid ammonia storage tank (A/B/C/D) 5 and the liquid ammonia storage tank 20 is connected with a spraying water pump 27 and a spraying water automatic control valve 26 in the spraying system and then a spraying main pipe. When the spraying system is abnormal, the elevated tank emergency automatic control valve 29 is manually switched on and off by one key, and the chilled brine at the temperature of-35 ℃ in the spray water emergency elevated tank 28 can run to a spray water main pipeline, an upper-layer spray S-shaped coil 8, a lower-layer spray S-shaped coil 9 and an S-shaped coil at the top of a liquid ammonia storage tank after the spray water automatic control valve 26 in the spraying system.
The liquid ammonia storage room 1 is internally provided with a liquid ammonia storage room ground 3, the angle of inclination from the ground center to the four cofferdams is 15 degrees so as to facilitate spraying overflow, and the liquid ammonia storage room ground 3 is subjected to antiseptic treatment.
The liquid ammonia storage room 1 is internally provided with a trench cofferdam 2 with the height of 50 cm and the width of 50 cm, the interior of the cofferdam is subjected to antiseptic treatment, and the cofferdam terminal is communicated with the liquid ammonia emergency groove 24 and is used for storing spraying overflow liquid and diversion liquid into the liquid ammonia emergency groove 24.
The upper spraying S-shaped coil automatic control valve 12 is installed at the inlet of the upper spraying S-shaped coil 8, the lower spraying S-shaped coil automatic control valve 11 is installed at the inlet of the lower spraying S-shaped coil 9, and the spraying water automatic control valve 26 and the spraying water pump 27 are installed at the inlet main pipe of the upper spraying S-shaped coil 8 and the lower spraying S-shaped coil 9.
The upper layer spraying S-shaped coil 8 and the lower layer spraying S-shaped coil 9 are provided with the cross shower head 10.
The showerhead 10 comprises a connection pipe 101, a connection pipe five-way 102, a showerhead elbow 103, a showerhead connector 104 and a showerhead 105. The connecting pipe 101 is connected with a shower water main pipe, the five-way connecting pipe 102 is connected with a shower short joint 106 through a screw port, the shower short joint 106 is connected with a shower elbow 103 through a screw port, the shower elbow 103 is connected with a shower connector 104 through a screw port, and the shower connector 104 and the shower nozzle 105 are formed by connecting matched screw ports.
The five-way connecting pipe 102 of the cross shower head 10 can be provided with 4 shower nozzles 105, and can spray at multiple angles to fully absorb and cool.
As above, the shower elbow 103 at one end of the shower connector 104 is connected via the screw, the other end is connected with the shower nozzle 105 via the matching screw, the shower connector 104 has a short-circuit sleeve 1043, a connecting lifting lug 1042 and a screw sleeve 1041 which are welded together, and a through hole is formed inside the short-circuit sleeve 1043.
The edge of the showerhead 105 as described above is angled at 15 degrees from horizontal α to provide a substantially mist spray.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood that it is not intended to be exhaustive or to limit the invention to the precise form disclosed, and that various modifications and adaptations may be resorted to without departing from the principles of the invention and are intended to those skilled in the art by virtue of the fact that the invention is described in detail and that such modifications and adaptations are intended to be comprehended by those skilled in the art and are intended to be within the scope of the invention.
The invention analyzes the potential safety hazard of liquid ammonia in the liquid ammonia production layer by layer, and solves the potential safety hazard and safety protection emergency problems of the gas concentration of a liquid ammonia space exceeding the standard and the pressure of a storage tank exceeding the standard by adding methods such as safety control exhaust fan interlocking, spraying system interlocking, induced air emergency system interlocking, liquid ammonia storage tank selective interlocking, axial flow fan matching interlocking and the like, and the spraying system can be manually and automatically switched to spray and cool an ammonia storage tank area in a high-temperature state. The spraying system solves the problem that when power failure occurs instantly and the UPS is completely powered off at the moment, the control system can close all the valves or be in an unknown state to cause a large amount of ammonia to enter a space, so that major safety accidents of explosion in the whole facility caused by concentration, pressure or high temperature of the ammonia are avoided, and the safety and reliability are improved.
In the above embodiment, a plurality of preset liquid ammonia gas alarm and pressure alarm reference values can be obtained according to experience requirements, and the specific values have an extremely important relationship with the sizes and spatial layouts of the liquid ammonia storage tank and the liquid ammonia storage room.
The invention mainly adds the safe operation of exhaust fan interlocking, spraying system interlocking, induced draft emergency system interlocking, liquid ammonia storage tank selective interlocking and axial flow fan matching interlocking, and simultaneously adds the control method of manually switching on and off the spraying system by one key, and the others are the same as the prior art.
Claims (11)
1. A liquid ammonia security control method comprises an exhaust fan system, a spraying system, an induced draft emergency system, a liquid ammonia storage tank and an axial flow fan, wherein the exhaust fan system is provided with a plurality of exhaust fans which are matched with exhaust fan interlocking; the spraying systems are multiple and are matched with the spraying system interlock; the air induction emergency systems are multiple and are matched with the air induction emergency system interlock; the plurality of liquid ammonia storage tanks are matched with the liquid ammonia storage tank interlock; the axial flow fan comprises a blowing axial flow fan and an air suction axial flow fan, and is respectively provided with a blowing axial flow fan matched with the air suction axial flow fan, and the axial flow fan is matched with an axial flow fan interlock to control a plurality of axial flow fans; the method is characterized in that: when DCS (distributed control system) is normally controlled, the liquid ammonia gas alarm instrument detects a preset high limit value E, F, a high limit value G, H, a preset remote transmission pressure gauge detection value high limit value I, J and a preset remote transmission pressure gauge detection value high limit value M, N, when the liquid ammonia security control system is in an automatic state, when the liquid ammonia gas alarm instrument detects that the concentration of liquid ammonia reaches the preset alarm high limit value E, F, an alarm is given, the set alarm high limit value G, H is reached, an exhaust fan interlock is opened, a spraying system interlock, an induced air emergency system interlock, a liquid ammonia storage tank interlock and an axial flow fan matching interlock are opened, and when the control system is automatically put into use, the DCS controls the opening of the exhaust fan, the opening of the spraying system, the opening of the induced air emergency system, the opening of the liquid ammonia storage tank system and the matching opening of the; when the liquid ammonia pressure reaches a set alarm high limit value I, J for alarm, and reaches a set alarm high limit value M, N, an exhaust fan interlock, a spraying system interlock, an induced air emergency system interlock, a liquid ammonia storage tank interlock and an axial flow fan matching interlock are opened; when the control system is automatically put into operation, the DCS controls the exhaust fan to be started, the spraying system to be started, the induced air emergency system to be started, the liquid ammonia storage tank system to be selectively started, the axial flow fan to be matched and started, the spraying water pump to be started, the lower spraying S-shaped coil automatic control valve to be started, and the upper spraying S-shaped coil automatic control valve to be started; the feeding automatic control valve of the underground liquid ammonia tank in the induced air emergency system is opened, the liquid ammonia emergency pump is started, and the liquid level of the liquid ammonia emergency tank is more than one half of the depth of the emergency tank; the liquid ammonia storage tank system can selectively open the liquid ammonia storage tank automatic control valve and the liquid ammonia storage tank compressor, and the liquid ammonia storage tank feeding automatic control valve carries out emergency tank pressing and inverting operation; when the axial flow fan is matched and started, the blowing axial flow fan is matched and started with the suction axial flow fan at the same time; when needed, the exhaust fan interlocking, the spraying system interlocking, the induced air emergency system interlocking, the liquid ammonia storage tank selective interlocking and the axial flow fan matching interlocking can be manually opened and stopped; when the indoor temperature is high, the spraying system can be manually opened to manually cool, the spraying water automatic control valve of the spraying system is opened, the spraying water pump is opened, the lower-layer spraying S-shaped coil automatic control valve is opened, and the upper-layer spraying S-shaped coil automatic control valve is opened; when the DCS is abnormal or the whole system is in a power-off state, the liquid ammonia security control system can start the spraying system, if the DCS cannot be automatically started in an abnormal state, the spraying system can be manually switched on and off by one key, the spraying emergency switch opens the emergency automatic control valve of the head tank, and the-35 ℃ chilled brine in the spraying emergency head tank is used for spraying and absorbing leaked ammonia gas and cooling through the ejector; the induced draft emergency system is provided with liquid level additional remote transmission liquid level meter indication, liquid level alarm and interlocking; the spraying emergency system comprises a spraying water emergency elevated tank, wherein frozen brine with the temperature of minus 35 ℃ is arranged in the spraying water emergency elevated tank and is used for spraying and absorbing leaked ammonia gas and simultaneously cooling the system; the liquid ammonia security control method is matched with a liquid ammonia security control device.
2. A control device implemented by a liquid ammonia security control method according to claim 1, characterized in that: the device for the liquid ammonia security control method mainly comprises a liquid ammonia storage room, a trench cofferdam, a liquid ammonia storage room ground, a liquid ammonia storage tank (A/B/C/D), an exhaust fan system, a spraying system, an induced air emergency system, a liquid ammonia storage tank system, an axial flow fan system and a spraying system, wherein a liquid ammonia gas alarm and a storage tank remote transmission pressure gauge in the storage tank and the storage room detect abnormity in real time, the security control device is started according to set conditions when the liquid ammonia security control system is normal, and the spraying system can be started by the liquid ammonia security control system when the DCS is abnormal or the whole system is in a power-off state.
3. A control device implemented by a liquid ammonia security control method according to claim 2, characterized in that: the liquid ammonia storage room is internally provided with a trench cofferdam, a liquid ammonia storage room ground, a liquid ammonia storage tank (A/B/C/D), a storage tank remote transmission pressure gauge, a storage tank, a liquid ammonia gas alarm instrument, an exhaust fan interlocking, a spraying system interlocking, an induced air emergency system, a liquid ammonia storage tank system and an axial flow fan system, wherein the liquid ammonia storage room is internally provided with the trench cofferdam, the height and the width of the trench cofferdam are 50 cm and 50 cm, the interior of the trench cofferdam is subjected to anti-corrosion treatment, and the terminal of the cofferdam is communicated with a liquid ammonia emergency groove and is used for storing spraying overflow liquid and guiding liquid into the; the liquid ammonia storage room ground, from ground center to the 15 degrees inclination angles in cofferdam on four sides so that spray overflow, liquid ammonia storage room ground is anticorrosive treatment.
4. A control device implemented by a liquid ammonia security control method according to claim 2, characterized in that: the exhaust fan system is provided with an exhaust fan and is located at a position where the liquid ammonia storage room is 3 meters away from the ground in the longitudinal direction and 6 meters away from the ground in the transverse direction.
5. A control device implemented by a liquid ammonia security control method according to claim 2, characterized in that: the spraying system is provided with an upper layer of spraying S-shaped coils, a lower layer of spraying S-shaped coils automatic control valves, an upper layer of spraying S-shaped coils automatic control valves, a cross sprinkler, an upper layer of spraying S-shaped coils located at the longitudinal distance of 1 meter on the top of the liquid ammonia storage room, a lower layer of spraying S-shaped coils located at the longitudinal distance of 1 meter below the upper layer of spraying S-shaped coils, and the spraying S-shaped coils in the spraying system are arranged at the top of each liquid ammonia storage tank.
6. A control device implemented by a liquid ammonia security control method according to claim 2, characterized in that: the air induction emergency system is provided with an air induction emergency pipeline, a liquid ammonia air induction emergency pump and an underground liquid ammonia tank feeding automatic control valve, wherein one end of the air induction emergency pipeline leads to the liquid ammonia storage room, the other end of the air induction emergency pipeline is connected with the liquid ammonia air induction emergency pump, and the air induction emergency pipeline leads to the liquid ammonia emergency tank and is about 20 cm from the bottom of the liquid ammonia emergency tank below the liquid level.
7. A control device implemented by a liquid ammonia security control method according to claim 2, characterized in that: the liquid ammonia storage tank system is provided with a liquid ammonia storage tank (AB/C/D), a liquid ammonia storage tank pipeline, a liquid ammonia storage tank automatic control valve, a liquid ammonia storage tank compressor, a liquid ammonia storage tank feeding automatic control valve, a liquid ammonia storage tank standby tank, a standby tank remote transmission pressure gauge and a standby tank gas alarm instrument, wherein the liquid ammonia storage tank (AB/C/D) emergency discharge part is connected with the liquid ammonia storage tank pipeline, the liquid ammonia storage tank automatic control valve is connected with the liquid ammonia storage tank pipeline, the liquid ammonia storage tank compressor, the liquid ammonia storage tank feeding automatic control valve and the liquid ammonia storage tank standby tank are provided with the standby tank remote transmission pressure gauge, the standby tank gas alarm instrument is arranged on the liquid ammonia storage tank standby tank top, and the spray water S-shaped coil.
8. A control device implemented by a liquid ammonia security control method according to claim 2, characterized in that: the axial flow fan system is provided with an air blowing axial flow fan and an air suction axial flow fan, wherein the air blowing axial flow fan is arranged at the position, 40 cm away from the ground, of the lower end of one wall, and the air suction axial flow fan is arranged at the position, 200 cm away from the ground, of the lower end of the wall, opposite to the air blowing flow fan.
9. A control device implemented by a liquid ammonia security control method according to claim 2, characterized in that: the spraying system is provided with a spraying water emergency elevated tank, an elevated tank emergency automatic control valve, an ejector and a spraying emergency switch, the elevated tank emergency automatic control valve is installed at the outlet of the spraying water emergency elevated tank, the ejector is provided with-35 ℃ frozen brine in the spraying water emergency elevated tank for spraying, absorbing, leaking ammonia and cooling, the spraying emergency switch is used for manually switching the elevated tank emergency automatic control valve in a one-key mode, the spraying water emergency system is connected with a spraying water main pipeline in the spraying system, when the spraying system is abnormal, the elevated tank emergency automatic control valve is manually switched in a one-key mode, and the-35 ℃ frozen brine in the spraying water emergency elevated tank can run to the spraying water main pipeline behind the spraying water automatic control valve in the spraying system, an upper spraying S-shaped coil, a lower spraying S-shaped coil and a liquid ammonia storage tank top S-shaped coil.
10. A control device implemented by a liquid ammonia security control method according to claim 5 or 9, characterized in that: the upper layer of the spraying system or the spraying water emergency system is provided with an upper layer spraying S-shaped coil automatic control valve at the inlet, a lower layer spraying S-shaped coil automatic control valve at the inlet, and a spraying water automatic control valve and a spraying water pump at the inlet of the upper layer spraying S-shaped coil and the inlet of the lower layer spraying S-shaped coil inlet header pipe.
11. The control device for realizing the liquid ammonia security control method according to claim 2, wherein the upper layer spraying S-shaped coil and the lower layer spraying S-shaped coil are provided with a cross shower head, the cross shower head comprises a connecting pipe, a connecting pipe five-way, a shower head elbow, a shower head connector and a shower head nozzle, the connecting pipe is connected with the spraying water main pipe, the connecting pipe five-way is connected with the shower head short-way through a screw port, the shower head short-way is connected with the shower head elbow through a screw port, the shower head elbow is connected with the shower head connector through a screw port, the shower head connector and the shower head nozzle are connected through a matched screw port, the connecting pipe five-way of the cross shower head can be provided with 4 shower head nozzles, the shower head can spray at multiple angles, the shower head elbow at one end of the shower head connector is connected through a screw port, the other end of the shower head connector is connected with the shower head through a screw port, the shower head connector is provided with a short-way sleeve, the connecting lug is welded with the screw sleeve, the through holes are arranged inside the short-connection sleeve, and the.
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| CN109163216B (en) * | 2018-09-26 | 2024-02-09 | 苏州市创优净化科技有限公司 | Safe intelligent liquid ammonia vaporization system |
| CN109621624B (en) * | 2018-12-18 | 2020-06-09 | 安徽海螺集团有限责任公司 | Control method of safety instrument system in liquid ammonia area of carbon dioxide capture system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52100367A (en) * | 1976-02-20 | 1977-08-23 | Nitsutou Kikai Kk | Method and apparatus for eliminating harm leaked ammonia |
| CN203115493U (en) * | 2013-03-12 | 2013-08-07 | 潍柴重机股份有限公司 | Comprehensive processing system with automatic cooling and leakage alarming functions for liquid ammonia tank |
| CN203202594U (en) * | 2013-04-28 | 2013-09-18 | 江苏安普特防爆科技有限公司 | Container-type LNG tank vehicle transportation tank |
| JP2014071997A (en) * | 2012-09-28 | 2014-04-21 | Noritz Corp | Cogeneration apparatus |
| CN104279423A (en) * | 2014-09-23 | 2015-01-14 | 中广核中科海维科技发展有限公司 | Liquid ammonia storage safety alarm device |
| CN104729950A (en) * | 2015-02-27 | 2015-06-24 | 杭州市特种设备检测研究院 | Ammonia liquid concentration measurement device |
| CN105972437A (en) * | 2016-07-07 | 2016-09-28 | 安徽淮化股份有限公司 | Safety monitoring system for liquid ammonia storage tank and application method of safety monitoring system |
-
2018
- 2018-03-16 CN CN201810216472.9A patent/CN108443708B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52100367A (en) * | 1976-02-20 | 1977-08-23 | Nitsutou Kikai Kk | Method and apparatus for eliminating harm leaked ammonia |
| JP2014071997A (en) * | 2012-09-28 | 2014-04-21 | Noritz Corp | Cogeneration apparatus |
| CN203115493U (en) * | 2013-03-12 | 2013-08-07 | 潍柴重机股份有限公司 | Comprehensive processing system with automatic cooling and leakage alarming functions for liquid ammonia tank |
| CN203202594U (en) * | 2013-04-28 | 2013-09-18 | 江苏安普特防爆科技有限公司 | Container-type LNG tank vehicle transportation tank |
| CN104279423A (en) * | 2014-09-23 | 2015-01-14 | 中广核中科海维科技发展有限公司 | Liquid ammonia storage safety alarm device |
| CN104729950A (en) * | 2015-02-27 | 2015-06-24 | 杭州市特种设备检测研究院 | Ammonia liquid concentration measurement device |
| CN105972437A (en) * | 2016-07-07 | 2016-09-28 | 安徽淮化股份有限公司 | Safety monitoring system for liquid ammonia storage tank and application method of safety monitoring system |
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