CN112503393A - System for automatically storing and transporting dangerous liquid - Google Patents
System for automatically storing and transporting dangerous liquid Download PDFInfo
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- CN112503393A CN112503393A CN202011312119.4A CN202011312119A CN112503393A CN 112503393 A CN112503393 A CN 112503393A CN 202011312119 A CN202011312119 A CN 202011312119A CN 112503393 A CN112503393 A CN 112503393A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/02—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants
- B67D7/0238—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants utilising compressed air or other gas acting directly or indirectly on liquids in storage containers
- B67D7/0266—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants utilising compressed air or other gas acting directly or indirectly on liquids in storage containers by gas acting directly on the liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/08—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/58—Arrangements of pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/12—Conveying liquids or viscous products by pressure of another fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a system for automatically storing and transporting dangerous liquid, which comprises a large tank and a small tank; the top of the large tank is connected with an external inert gas supply pipeline, the external inert gas supply pipeline is sequentially provided with a large tank inflation one-way valve and an inert gas pressure reducing valve, and the top of the large tank is also provided with a large tank safety valve; the large tank is also provided with a large tank liquid level sensor and a large tank pressure sensor; a liquid inlet at the bottom of the big tank is connected with a liquid delivery pump through a big tank liquid inlet one-way valve; the liquid outlet of the big tank is communicated to the small tank through a pipeline provided with an automatic liquid supply valve; a small tank liquid level sensor is arranged on the small tank; the liquid delivery pump is in signal control connection with a large tank liquid level sensor or a large tank pressure sensor; the liquid supply automatic valve is respectively connected with the large tank liquid level sensor and the small tank liquid level sensor in a signal control way. The system for automatically storing and transporting the dangerous liquid can realize safer large-tank storage, liquid supplement and external liquid supply.
Description
Technical Field
The invention relates to the field of storage and transportation of dangerous liquid, in particular to an automatic storage and transportation system for dangerous liquid.
Background
By hazardous liquids, it is meant that they may be toxic, flammable, corrosive, etc. to some extent, and although they are liquids, they may evaporate into the air and cause fire or personal injury, especially volatile liquids. In industrial production, there are apparatuses which require the use of these liquids as solvents, penetrants, lubricants, etc., such as diesel-driven pumps, diesel-driven blowers, cutters, washers. The liquid can be continuously consumed in the continuous operation process of the devices, so the devices can be provided with a liquid storage tank, the volume of the liquid storage tank cannot be too large for reducing operation danger, and some devices only enough operate for two to three hours, so that the liquid storage tank is required to be added once every two to three hours.
It is known to arrange at a distance from the liquid-consuming apparatus one or more relatively large-volume containers (hereinafter referred to as large tanks) having a total capacity sufficient to satisfy the local period of outsourcing supply of such liquid, the containers being atmospheric pressure containers with their tops open to the atmosphere. When the device is used, the large tank is filled by the liquid tank truck by using the vehicle-mounted pump, then the liquid in the large tank is pumped by the liquid supply pump of the user, and is conveyed to the liquid storage tank (hereinafter referred to as a small tank) of the device body through a pipeline, when the small tank is filled, the pump is stopped, and when the liquid in the small tank is exhausted, the pump is started again to add liquid.
Although the technology meets the equipment operation conditions, the following problems still exist:
1. the normal pressure container is used as a big tank, and when the storage medium is volatile dangerous liquid, the volatilized dangerous gas can be emitted out through a communication port between the big tank and the atmosphere to cause environmental pollution; or the external air enters the tank body from the communicating port and forms an explosive gas environment with the volatile gas of the flammable liquid.
2. In order to avoid the above situation, measures such as a floating roof storage tank, a nitrogen gas sealing protection system, gas discharged from a closed recovery tank and the like can be adopted. However, these facilities are suitable for large oil tanks and oil depots, and the 'large tank' related to the invention is much smaller than the 'small tank' in volume, so that the adoption of the protection measure is not very cost-effective.
3. And (4) adding liquid into the small tank by adopting a liquid conveying pump. If manual operation is adopted, 2 persons are needed to cooperate to complete the operation, if the equipment is continuously operated for 24 hours, shift work is needed, and according to the shift arrangement situation, the number of the persons is doubled, so that the operation idea of the modern automatic factory is not met. From the perspective of humanization, the simple and repeated work is more suitable for automatic operation, but the probability of accidents during automatic operation is much higher than that during manual operation, and the consequences of the accidents are serious. Because the automatic control of the starting and stopping of the pump is involved, the higher the starting and stopping frequency of the pump is, the greater the risk of out-of-control is, and in case of out-of-control, the liquid supply interruption caused by out-of-control starting of the pump can be caused, and the equipment is stopped; another possibility is that the pump shutdown is out of control resulting in a liquid spill that spreads into the surrounding environment with unforeseeable consequences.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a system for automatically storing and transporting dangerous liquid, which can realize safer large-tank storage, liquid replenishment and external liquid supply.
In order to achieve the purpose, the invention adopts the technical scheme that:
the system for automatically storing and transporting the dangerous liquid comprises a large tank and a small tank; the top of the large tank is connected with an external inert gas supply pipeline, a large tank inflation one-way valve and an inert gas pressure reducing valve are sequentially arranged on the external inert gas supply pipeline, and a large tank safety valve is further arranged on the top of the large tank; the large tank is also provided with a large tank liquid level sensor and a large tank pressure sensor; the liquid inlet at the bottom of the big tank is connected with a liquid delivery pump through a big tank liquid inlet one-way valve; the liquid outlet of the big tank is communicated to the small tank through a pipeline provided with an automatic liquid supply valve; a small tank liquid level sensor is arranged on the small tank;
the liquid delivery pump is in signal control connection with the large tank liquid level sensor or the large tank pressure sensor;
and the liquid supply automatic valve is in signal control connection with the large tank liquid level sensor and the small tank liquid level sensor respectively.
Further, a small tank liquid volatile matter absorption and purification device is arranged at the top of the small tank.
Further, the large tank is a pressure storage tank with the volume capable of meeting the supply period of outsourcing liquid; the small tank is a totally enclosed liquid storage tank or a liquid storage tank and is provided with a vent, and a closed liquid inlet and a liquid inlet pipe are arranged and inserted to the bottom of the tank.
Further, the inert gas pressure reducing valve is a self-operated pressure reducing valve, a pneumatic regulating valve or an electric regulating valve.
Further, the liquid supply automatic valve is a pneumatic valve, an electric valve, an electromagnetic valve or a flow regulating valve.
Further, the automatic liquid supply valve is of a fail-close type and is in a closed state when a failure or power failure occurs.
Furthermore, the automatic liquid supply valve is connected with a PLC program control system and is provided with a valve position switch, and when the automatic liquid supply valve is abnormally opened and closed, an alarm signal can be sent out and remotely transmitted to a central control room.
Further preferably, the liquid supply automatic valve can be controlled in an interlocking manner by a PLC program or operated manually at a remote position.
Further, the large tank liquid level sensor, the small tank liquid level sensor and the large tank pressure sensor are respectively connected with the PLC program control system.
Further, a manual bypass valve is arranged at the automatic liquid supply valve.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
according to the system for automatically storing and transporting the dangerous liquid, when the storage medium is the volatile dangerous liquid, the large tank is not communicated with the atmosphere any more, and the medium in the tank is isolated from the outside, so that the fire hazard or the environmental pollution caused by the volatilization of the dangerous liquid in the tank into the atmosphere can be effectively controlled; inert gas is filled in the large tank, and a liquid medium in the large tank is isolated from air, so that an explosive gas environment can be avoided when liquid volatile matters are mixed with air in the tank, and meanwhile, the air cannot enter the storage tank to corrode the interior of the storage tank; the outlet of the large tank is communicated with the small tank through a pipeline, liquid is pushed to overcome the pipeline resistance and the liquid level pressure difference from the outlet of the storage tank to the small tank by means of the pressure of inert gas in the large tank, the medium in the large tank is conveyed into the small tank, the air pressure is used as a power source for liquid supply operation, the pump is replaced by frequent starting and stopping, the safety is higher, and the error probability in the automatic control process is reduced; the safe storage and liquid supplement of the large tank and the external liquid supply can be realized.
Drawings
FIG. 1 is a schematic diagram of the system for automated storage and transportation of hazardous liquids of the present invention;
wherein the reference numerals are:
1-large tank; 2-small pot; 3-a liquid delivery pump; 4-inert gas pressure reducing valve; 5-automatic liquid supply valve; 6-a small tank of liquid volatile matter absorption and purification device; 7-big tank liquid inlet one-way valve; 8-big tank inflation one-way valve; 9-big tank safety valve; 10-large tank level sensor; 11-small tank level sensor; 12-big tank pressure sensor.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The working medium and working parameters are only given as examples and are not intended to limit the present invention.
Example 1
The embodiment provides a system for automatically storing and transporting dangerous liquid, which is shown in figure 1 and comprises a large tank 1 and a small tank 2; the top of the large tank 1 is connected with an external inert gas supply pipeline, a large tank inflation one-way valve 8 and an inert gas pressure reducing valve 4 are sequentially arranged on the external inert gas supply pipeline, and a large tank safety valve 9 is further arranged at the top of the large tank 1; the large tank 1 is also provided with a large tank liquid level sensor 10 and a large tank pressure sensor 12; a liquid inlet at the bottom of the big tank 1 is connected with a liquid delivery pump 3 through a big tank liquid inlet one-way valve 7; the liquid outlet of the big tank 1 is communicated to the small tank 2 through a pipeline provided with an automatic liquid supply valve 5; a small tank liquid level sensor 11 is arranged on the small tank 2;
wherein, the liquid delivery pump 3 is in signal control connection with a large tank liquid level sensor 10 or a large tank pressure sensor 12; the automatic liquid supply valve 5 is respectively connected with a large tank liquid level sensor 10 and a small tank liquid level sensor 11 in a signal control way.
The large tank 1 is a pressure storage tank with the volume capable of meeting the supply period of outsourcing liquid, a vent hole in the traditional technology is omitted, the large tank is not communicated with the atmosphere any more, the medium in the tank is isolated from the outside, and the fire hazard or the environmental pollution caused by the volatilization of dangerous liquid in the tank into the atmosphere can be effectively controlled.
Inert gas is filled in the large tank 1 through an external inert gas supply pipeline, air in the tank is exhausted by adopting the inert gas such as nitrogen and the like, then certain pressure is kept, a liquid medium in the tank is isolated from the air, the situation that liquid volatile matters are mixed with the air in the tank to form an explosive gas environment can be avoided, and meanwhile, the air cannot enter the storage tank to corrode the interior of the storage tank. The external inert gas supply pipeline is sequentially provided with a large tank inflation one-way valve 8 and an inert gas pressure reducing valve 4, the external inert gas supply pressure is higher than the lowest working pressure of the large tank 1, and the outlet pressure value of the inert gas pressure reducing valve 4 is the lowest working pressure of the large tank 1 and is calculated according to the resistance of a pipeline of the large tank 1 communicated with the small tank 2. When the pressure in the large tank 1 is lower than this value, the inert gas pressure reducing valve 4 is automatically opened to inflate it, and when the pressure reaches or exceeds this value, the inert gas pressure reducing valve 4 is automatically closed. The function of the inert gas pressure reducing valve 4 is to maintain the minimum operating pressure of the large tank 1. The inert gas pressure reducing valve 4 is preferably a self-operated pressure reducing valve, a pneumatic control valve, or an electric control valve.
The top of the large tank 1 is also provided with a large tank safety valve 9, and the large tank safety valve 9 has the function that when the system is overpressured due to reasons, the safety valve is automatically opened to release pressure.
According to the invention, the outsourcing liquid is pumped into the large tank by adopting the liquid delivery pump 3, when the lift of the liquid delivery pump 3 is not enough to unload the liquid medium in the tank car into the storage tank, a pump can be additionally arranged on the liquid inlet pipe of the storage tank for pressurization, and finally the outlet pressure of the pump is higher than the internal pressure when the liquid in the large tank 1 reaches the highest limited liquid level. The motor of the liquid delivery pump 3 is interlocked with the liquid level of the large tank or the pressure of the large tank, so that the pump is automatically stopped when the liquid level of the large tank 1 is higher than a certain set value or the pressure of the large tank is higher than a certain set value; and the pump can be manually stopped according to the field display of the storage tank liquid level meter or the pressure gauge.
A liquid outlet of a large tank 1 is communicated to a small tank 2 through a pipeline, when liquid is supplied to the outside, the liquid is pushed to overcome the pipeline resistance and the liquid level pressure difference from the outlet of the large tank 1 to the small tank 2 by means of the pressure of inert gas in the large tank 1, and a medium in the large tank 1 is conveyed into the small tank 2. When the pressure in the large tank 1 is insufficient, the inert gas pressure reducing valve 4 on the inert gas supply pipe can be automatically opened to charge the large tank 1 and maintain the internal pressure of the large tank. The above design adopts air pressure as a power source to supply liquid, replaces frequent start and stop of a pump, is relatively safer, and reduces the error probability in the automatic control process.
The liquid supply automatic valve 5 is respectively connected with a large tank liquid level sensor 10 and a small tank liquid level sensor 11 in a signal control way, the large tank liquid level sensor 10 and the small tank liquid level sensor 11 can convert liquid level signals into electric signals and output the electric signals to the liquid supply automatic valve 5, and the liquid level display instruments have the on-site liquid level display function. The liquid supply automatic valve 5 is selected from a pneumatic valve, an electric valve, an electromagnetic valve or a flow regulating valve and the like, and can realize the interlocking opening and closing according to the set conditions without manual field operation. When the liquid level of the large tank 1 is lower than a certain set value, the automatic liquid supply valve 5 is closed; when the liquid level of the small tank 2 is higher than a certain set value, the automatic liquid supply valve 5 is closed; when the liquid level of the small tank 2 is lower than a certain set value and the liquid level of the large tank 1 is higher than a certain set value, the automatic liquid supply valve 5 is opened. Preferably, the automatic liquid supply valve 5 may be provided in two or more numbers and interlocked with two or more level meters of the large tank 1 and the small tank 2, respectively, according to the control principle described above.
In the invention, the small pot 2 adopts a closed liquid adding and organized discharging mode, and the top of the small pot is also provided with a small pot liquid volatile matter absorbing and purifying device 6. If the small tank 2 is self-contained, the equipment manufacturer is required to customize the liquid storage tank with the following functions: (1) making a totally enclosed storage tank and arranging an air vent; (2) a closed liquid inlet is arranged, and a liquid inlet pipe is inserted to the bottom of the tank.
The automatic liquid supply valve 5 of the present invention is of the fail-close type, and is closed when it fails or power fails.
The automatic liquid supply valve 5 is connected with a PLC program control system and is provided with a valve position switch, and when the automatic liquid supply valve is abnormally opened and closed, an alarm signal can be sent out and remotely transmitted to a central control room; the automatic liquid supply valve 5 can be controlled in an interlocking way by adopting a PLC program or operated manually at a remote place. The automatic valve can remove the PLC program interlocking control and switch to remote manual operation, and when the liquid level meter cannot output signals due to faults, or abnormal conditions occur in a field monitoring picture, or when dangerous conditions occur in the field and manual operation cannot be performed, the valve can be manually operated remotely and manually. The large tank liquid level sensor 10, the small tank liquid level sensor 11 and the large tank pressure sensor 12 are respectively connected with a PLC program control system, and all on-site liquid levels, pressures, valve positions and various alarm signals are remotely transmitted to a PLC program to be displayed in real time.
As a preferred example, a manual bypass valve is arranged at the automatic liquid supply valve 5 for standby, and when the automatic liquid supply valve 5 works abnormally or needs to be overhauled, the manual bypass valve can be operated manually on site to complete liquid supply.
Example 2
This implementation provides a specific operational flow of the above system:
big jar 1 is before the feed liquor, replaces with nitrogen gas earlier, detects the back that oxygen content reached standard in the exhaust, keeps jar internal pressure to be 1bar (this pressure value is the gauge pressure, below the pressure value is whole for the gauge pressure), sets for relief pressure valve 4 outlet pressure simultaneously and is 1bar, can guarantee when the pressure in the storage tank is less than 1bar, and nitrogen gas is automatic to be mended.
According to the ideal gas equation of state, the absolute pressure of a gas is inversely proportional to the volume when the amount and temperature of the gas are constant. It is easy to calculate: when the liquid level in the tank reaches 50%, the pressure in the tank is 3 bar; when the liquid level in the tank reaches 75%, the pressure in the tank is 7 bar; when the liquid level in the tank reaches 25%, the pressure in the tank is 1.7 bar; when the liquid level in the tank reached 12.5%, the pressure in the tank was 1.3 bar.
If the maximum level limit for normal operation of the large tank 1 is set to 50% and the minimum limit to 12.5%, the volumetric utilization of the storage tank is 37.5%. The required large tank volume can be calculated according to the liquid consumption of the equipment and the liquid purchasing period; or calculating the maximum and minimum limit liquid levels under the condition that the large tank volume is not changed, and the calculation is not illustrated.
If the maximum liquid level is 50%, the corresponding maximum operating pressure is 3bar, from which it can be determined that the outlet pressure of the liquid transfer pump 3 should be higher than 3 bar. At the moment, when the liquid level of the large tank 1 detected by the liquid level meter 10 reaches 45%, an alarm is given; when the pressure sensor 12 detects that the pressure P of the large tank 1 is more than or equal to 3bar, the pump 3 is automatically stopped; when the system is abnormal, the pressure P of the large tank 1 is more than or equal to 3.5bar, an alarm is sent out, and when the pressure P is more than or equal to 4bar, the safety valve 9 is automatically opened.
If the minimum liquid level is 12.5%, the corresponding minimum working pressure is 1.3 bar. Therefore, when the pressure sensor 12 detects that the pressure P of the large tank 1 is less than or equal to 1.3bar, an alarm is given; when the liquid level meter 10 detects that the liquid level of the large tank 1 is lower than 10%, the automatic valve 5 is closed, and liquid supply is stopped. When the liquid level of the small tank 2 is detected by the liquid level meter 11 to be lower than 10 percent and the liquid level of the large tank 1 is detected by the liquid level meter 10 to be higher than 15 percent, the automatic valve 5 is opened to supply liquid; when the liquid level meter 11 detects that the liquid level of the small tank 2 is higher than 90%, the automatic valve 5 is closed, and the liquid supply is stopped.
According to the principle, when the liquid level limiting device is used normally, liquid is conveyed to the position near a large tank by the tank car, an operator connects a liquid outlet of the tank car with a liquid inlet pipeline of the pump 3 through a hose, then the pump 3 is started, and when the liquid level of the large tank 1 reaches the highest limiting liquid level, the pump 3 is automatically stopped. Then, the unloading valve is closed by an operator, the connecting hose is disassembled, and the operation is repeated when the next large tank 1 needs to be replenished. The liquid supply flow is automatically completed under the control of a PLC program without manual operation.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The system for automatically storing and transporting the dangerous liquid is characterized by comprising a large tank (1) and a small tank (2); the top of the large tank (1) is connected with an external inert gas supply pipeline, a large tank inflation one-way valve (8) and an inert gas pressure reducing valve (4) are sequentially arranged on the external inert gas supply pipeline, and a large tank safety valve (9) is further arranged at the top of the large tank (1); the large tank (1) is also provided with a large tank liquid level sensor (10) and a large tank pressure sensor (12); a liquid inlet at the bottom of the big tank (1) is connected with a liquid delivery pump (3) through a big tank liquid inlet one-way valve (7); the liquid outlet of the big tank (1) is communicated to the small tank (2) through a pipeline provided with an automatic liquid supply valve (5); a small tank liquid level sensor (11) is arranged on the small tank (2);
the liquid delivery pump (3) is in signal control connection with the large tank liquid level sensor (10) or the large tank pressure sensor (12);
the automatic liquid supply valve (5) is respectively in signal control connection with the large tank liquid level sensor (10) and the small tank liquid level sensor (11).
2. The system for the automatic storage and transportation of dangerous liquids according to claim 1, characterized in that the top of said small tank (2) is also provided with a small tank liquid volatile absorption and purification device (6).
3. The system for the automatic storage and transportation of dangerous liquids according to claim 1, characterized in that said large tank (1) is a pressure tank with a capacity suitable for the supply cycle of the outsourcing liquid; the small tank (2) is a totally enclosed liquid storage tank or a liquid storage tank and is provided with a vent, and a closed liquid inlet is also arranged and a liquid inlet pipe is inserted to the bottom of the tank.
4. The system for the automatic storage and transportation of dangerous liquids according to claim 1, characterized in that said inert gas pressure reducing valve (4) is a self-operated pressure reducing valve, a pneumatic regulating valve or an electric regulating valve.
5. The system for the automatic storage and transportation of dangerous liquids according to claim 1, characterized in that said automatic liquid supply valve (5) is a pneumatic, electric, solenoid or flow-regulating valve.
6. The system for the automatic storage and transportation of dangerous liquids according to claim 1, characterized in that said automatic valve (5) for liquid supply is of the fail-close type, closed when it is faulty or power-fail.
7. The system for the automatic storage and transportation of dangerous liquid according to claim 1, wherein the automatic liquid supply valve (5) is connected with a PLC program control system and is provided with a valve position switch, and when the valve position switch is abnormally opened and closed, an alarm signal can be sent out and transmitted to a central control room.
8. The system for the automatic storage and transportation of dangerous liquids according to claim 7, characterized in that said automatic valve for liquid supply (5) can be interlocked controlled by PLC program or operated manually at remote.
9. The system for the automatic storage and transportation of dangerous liquids according to claim 1, characterized in that said large tank level sensor (10), small tank level sensor (11) and large tank pressure sensor (12) are connected with PLC program control system respectively.
10. The system for the automatic storage and transportation of dangerous liquids according to claim 1, characterized in that at said automatic liquid feed valve (5) there is a manual bypass valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011312119.4A CN112503393B (en) | 2020-11-20 | 2020-11-20 | System for automatically storing and transporting dangerous liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011312119.4A CN112503393B (en) | 2020-11-20 | 2020-11-20 | System for automatically storing and transporting dangerous liquid |
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| CN112503393A true CN112503393A (en) | 2021-03-16 |
| CN112503393B CN112503393B (en) | 2023-03-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394570A (en) * | 2022-02-14 | 2022-04-26 | 连云港石化有限公司 | Difficult-to-volatilize chemical liquid conveying system and automatic control method |
| CN114506810A (en) * | 2022-02-24 | 2022-05-17 | 湖北兴福电子材料有限公司 | Safe unloading device and method for liquid sulfur trioxide |
| CN115869662A (en) * | 2022-01-06 | 2023-03-31 | 中集安瑞科工程科技有限公司 | Defoaming agent mixing and feeding device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116200A (en) * | 1984-11-12 | 1986-06-03 | Toshiba Corp | Nitrogen gas supplying device |
| CN201100525Y (en) * | 2007-10-15 | 2008-08-13 | 刘学忠 | High and middle pressure gas source device for natural gas |
| CN101418913A (en) * | 2008-11-07 | 2009-04-29 | 中国海洋石油总公司 | Pressure priming device |
| CN202660238U (en) * | 2012-05-29 | 2013-01-09 | 杭州杭氧环保成套设备有限公司 | Stabilivolt feed liquid device of low temperature pump and cold trap |
| CN202660239U (en) * | 2012-05-29 | 2013-01-09 | 杭州杭氧环保成套设备有限公司 | Constant-pressure liquid feed device of cooling system |
| CN104989952A (en) * | 2015-07-22 | 2015-10-21 | 广东汉能薄膜太阳能有限公司 | Continuous and stable high-purity chemical conveying system and method |
| CN205664121U (en) * | 2016-05-31 | 2016-10-26 | 淄博出入境检验检疫局综合技术服务中心 | Toxic liquid is stored and quantitative conveying device |
| CN110953483A (en) * | 2019-12-27 | 2020-04-03 | 青岛博纳德机械科技有限公司 | Chemical agent adding method and device |
| CN210654616U (en) * | 2019-08-29 | 2020-06-02 | 中石化南京化工研究院有限公司 | Liquid storage device without exhaust gas discharge |
-
2020
- 2020-11-20 CN CN202011312119.4A patent/CN112503393B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116200A (en) * | 1984-11-12 | 1986-06-03 | Toshiba Corp | Nitrogen gas supplying device |
| CN201100525Y (en) * | 2007-10-15 | 2008-08-13 | 刘学忠 | High and middle pressure gas source device for natural gas |
| CN101418913A (en) * | 2008-11-07 | 2009-04-29 | 中国海洋石油总公司 | Pressure priming device |
| CN202660238U (en) * | 2012-05-29 | 2013-01-09 | 杭州杭氧环保成套设备有限公司 | Stabilivolt feed liquid device of low temperature pump and cold trap |
| CN202660239U (en) * | 2012-05-29 | 2013-01-09 | 杭州杭氧环保成套设备有限公司 | Constant-pressure liquid feed device of cooling system |
| CN104989952A (en) * | 2015-07-22 | 2015-10-21 | 广东汉能薄膜太阳能有限公司 | Continuous and stable high-purity chemical conveying system and method |
| CN205664121U (en) * | 2016-05-31 | 2016-10-26 | 淄博出入境检验检疫局综合技术服务中心 | Toxic liquid is stored and quantitative conveying device |
| CN210654616U (en) * | 2019-08-29 | 2020-06-02 | 中石化南京化工研究院有限公司 | Liquid storage device without exhaust gas discharge |
| CN110953483A (en) * | 2019-12-27 | 2020-04-03 | 青岛博纳德机械科技有限公司 | Chemical agent adding method and device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115869662A (en) * | 2022-01-06 | 2023-03-31 | 中集安瑞科工程科技有限公司 | Defoaming agent mixing and feeding device |
| CN114394570A (en) * | 2022-02-14 | 2022-04-26 | 连云港石化有限公司 | Difficult-to-volatilize chemical liquid conveying system and automatic control method |
| CN114506810A (en) * | 2022-02-24 | 2022-05-17 | 湖北兴福电子材料有限公司 | Safe unloading device and method for liquid sulfur trioxide |
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| CN112503393B (en) | 2023-03-28 |
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