CN107673302A - The control system and method that Intelligent Low Temperature liquid tank car fills - Google Patents

The control system and method that Intelligent Low Temperature liquid tank car fills Download PDF

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Publication number
CN107673302A
CN107673302A CN201711115460.9A CN201711115460A CN107673302A CN 107673302 A CN107673302 A CN 107673302A CN 201711115460 A CN201711115460 A CN 201711115460A CN 107673302 A CN107673302 A CN 107673302A
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CN
China
Prior art keywords
cryogenic liquid
liquid pump
valve
dcs controllers
control
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Granted
Application number
CN201711115460.9A
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Chinese (zh)
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CN107673302B (en
Inventor
曾贵彬
李国平
李宏
谌海军
张剑
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ABA Wenchuan Overseas Chinese Source Gas Co Ltd
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ABA Wenchuan Overseas Chinese Source Gas Co Ltd
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Priority to CN201711115460.9A priority Critical patent/CN107673302B/en
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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
    • B67D7/80—Arrangements of heating or cooling devices for liquids to be transferred
    • 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
    • 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
    • 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
    • B67D7/30—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred with means for predetermining quantity of liquid to be transferred
    • B67D7/301—Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred with means for predetermining quantity of liquid to be transferred using mechanical means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses the control system and method that a kind of Intelligent Low Temperature liquid tank car fills, system includes DCS controllers, the device that weighs, cryogenic liquid tank, cryogenic liquid pump, frequency converter, temperature detecting module, pressure detecting module and control valve；Described control valve includes liquid feed valve, return valve and outlet stop valve；Cryogenic liquid tank is connected with least one water influent pipeline, and each water influent pipeline is connected with least one cryogenic liquid pump, and a liquid feed valve is provided with water influent pipeline；Each cryogenic liquid pump is connected by return line with cryogenic liquid tank, and return valve is provided with return line；Each cryogenic liquid pump is also connected with filling house steward, is filled house steward and is connected by exporting stop valve with filling a tank car.Cryogenic liquid pump automatic control system and method provided by the invention, by detection and control technology, solve complex operation when cryogenic liquid pump fills car, high are required to operating personnel, is easily damaged equipment, reduces operating personnel's burden.

Description

The control system and method that Intelligent Low Temperature liquid tank car fills
Technical field
The present invention relates to a kind of preparation of cryogenic gas and transport field, more particularly to a kind of Intelligent Low Temperature liquid tank car to fill The control system and method for dress.
Background technology
In recent years, cryogenic liquid（Liquid oxygen, liquid nitrogen, liquid argon）Usage amount it is increasing, corresponding output is also increasingly Greatly, cryogenic liquid pump is used more and more；Cryogenic liquid, which fills car owner, at present will have 2 kinds to fill mode, and one kind is dived using low temperature Liquid pump, another kind are to use low-temperature centrifugal pump.
Low temperature immersed pump is easy to use, but low temperature immersed pump manufacturing technology requires high, and main monopolization is a small number of abroad at present In a few company's hands, so price is especially high, later period maintenance expense is also especially high, and services not in time；Low-temperature centrifugal pump Price is relatively low, but low-temperature centrifugal pump complex operation, and the requirement to operating personnel is higher, and improper use easily causes damage It is bad.Cryogenic liquid at present（Liquid oxygen, liquid nitrogen, liquid argon）Fill car owner and to use low-temperature centrifugal pump.
Low-temperature centrifugal pump fills car operating process and is at present：After tank car is in place, the liquid feed valve of operating personnel's standard-sized sheet filling pump, entirely Drive return valve and precooling operation is carried out to cryogenic pump, treat pump housing whole frosting, interval opens outlet residual-gas valve, when raffinate valve outlet has When liquid is discharged or the thermometer displays temperature of outlet is less than -150 DEG C, judge that pump precooling is qualified.Operating personnel, which connect, fills car Fill flexible pipe, the liquid feed valve of standard-sized sheet tank car, the return valve of cryogenic liquid pump is then closed into a part.Operating personnel are again by opening pump Button opens pump, and outlet pressure is observed after opening pump, if outlet pressure reaches more than 7bar, slowly closing return valve, if gone out Mouthful pressure is less than 7bar, then judge pump there is no precooling good or pump in have gas, it is necessary to drive big return valve, if after driving big return valve Or pressure is still without ascendant trend, then necessary termination of pumping, opens pump again after precooling pump again.The operation of people is closed very much in aforesaid operations Key, if return valve is opened small, easily cause that precooling is insufficient, the mechanical seal of pump does not have cold, and turn on pump easily causes pump Damage；If return valve is opened greatly, then will waste substantial amounts of fluid product again；Fill the typically no pressure control of car system at present System, superpressure are usually safety valve jumping up, and cryogenic liquid sprays after safety valve jumping up, and also there is larger security risk.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide the control that a kind of Intelligent Low Temperature liquid tank car fills System and method processed.
The purpose of the present invention is achieved through the following technical solutions：The control that a kind of Intelligent Low Temperature liquid tank car fills System processed, including DCS controllers, the device that weighs, cryogenic liquid tank, cryogenic liquid pump, frequency converter, temperature detecting module, pressure Power detection module and control valve；Described control valve includes liquid feed valve, return valve and outlet stop valve；
Described cryogenic liquid tank is connected with least one water influent pipeline, each water influent pipeline and at least one cryogenic liquid pump Connect, a liquid feed valve is provided with described water influent pipeline；Each cryogenic liquid pump passes through return line and Low Temperature Liquid Body storage tank is connected, and return valve is provided with described return line；Each cryogenic liquid pump is also connected with filling house steward, is filled House steward is connected by exporting stop valve with filling a tank car；
Temperature detecting module and pressure detecting module are additionally provided with cryogenic liquid pump exit, described filling also is set on house steward Pressure detecting module is equipped with, described cryogenic liquid pump passes through Frequency Converter Control；Described filling is additionally provided with the dress that weighs on position Put；The data output end of described temperature detecting module, pressure detecting module and the device that weighs is connected with DCS controllers, DCS The control output end of controller is connected with liquid feed valve, return valve, outlet stop valve and frequency converter respectively.
Further, described system also includes a display control unit being connected with DCS controllers：For showing temperature Spend detection module, pressure detecting module, the detection data for the device that weighs, and liquid feed valve, return valve, outlet stop valve and frequency conversion The status data of device.
Further, described DCS controllers include intelligent selection module：For the tank car number beamed back according to the device that weighs Data are measured, select the cryogenic liquid pump of respective amount to be filled.
Further, described DCS controllers include pump running down control module：For being not detected by tank car in the device that weighs It is to be filled and detect tank car it is to be filled enter pre-cold state when, control cryogenic liquid pump running down.
The method for the control system that a kind of Intelligent Low Temperature liquid tank car as described above fills, including tank car judge in place Step, precooling step, tank car fill flexible pipe installation steps, cryogenic liquid pump initiation step and fill car step；Described tank car is just Position judgment step includes following sub-step：
Multiple devices that weigh are detected to bearing weight in real time, and real-time testing result is sent to DCS controllers；Work as DCS When controller judges to detect that bearing weight meets preparatory condition, then respectively enter precooling step and tank car fills flexible pipe installation step Suddenly；
Described precooling step includes following sub-step：
S101：DCS controllers control liquid feed valve and return valve to be opened according to setting aperture；
S102：Temperature detecting module detects cryogenic liquid pump outlet temperature in real time, while DCS controllers are calculated to liquid feed valve and returned Stream valve sends the time span after control command；
S103：When the time span that the outlet temperature that DCS controllers are got falls below design temperature and calculated is more than When setting minimum pre-coo time, then it is assumed that precooling is completed, into cryogenic liquid pump initiation step；
Described cryogenic liquid pump initiation step includes following sub-step：
S201：DCS controllers start cryogenic liquid pump by frequency converter；
S202：Pressure detecting module detects cryogenic liquid pump discharge pressure in real time；
S203：DCS controllers receive cryogenic liquid pump discharge pressure data, and are judged：（1）If cryogenic liquid pump discharge pressure When power is less than preset value, DCS controllers judge to fill car pump as idling conditions, and DCS controllers control return valve is opened greatly, and returns to step Rapid S202；（2）If cryogenic liquid pump discharge pressure is more than preset value, DCS controllers control return valve is progressively closed；Progressively Judged during closing：If cryogenic liquid pump discharge pressure exceedes high report value, DCS controllers control return valve is opened And return to step S202, to reduce exhaust duct pressure, manifold pressure is maintained the reflux in normal range (NR)；
Described tank car, which fills flexible pipe installation steps, includes following sub-step：
S301：What operating personnel connected tank car fills flexible pipe；
S302：DCS controllers control outlet stop valve is opened；
Described car step of filling includes following sub-step：
S401：When DCS controllers judge that tank car fills the completion of flexible pipe installation steps, start to fill car；Wherein：（1）Transported stable Pump discharge pressure is provided with during row to control：After cryogenic liquid pump startup normal operation, cryogenic liquid pump discharge pressure surpasses When crossing 7bar, DCS controllers will control return valve to close；When cryogenic liquid pump discharge pressure is more than 12bar, then outlet pressure is inclined Height, DCS controllers control return valve are opened；（2）DCS controllers judge to fill effect by filling the upper pressure detecting module of house steward Rate, when all return valve Close Alls, if filled, manifold pressure is relatively low, and DCS controllers restart a Low Temperature Liquid Body pump, raising fill manifold pressure, and raising fills efficiency；（3）If filling manifold pressure exceedes high limit, DCS controllers pass through Frequency Converter Control cryogenic liquid pump running down；
S402：When DCS controllers receive when bearing weight and meeting preparatory condition of device transmission of weighing, then it is assumed that it is complete to fill car Finish, DCS controllers control outlet stop valve is closed；
S403：DCS controllers judge whether that also other vehicles are carrying out filling car, if then return to step S401, if No then DCS controllers return to tank car judgment step in place after sending pump running down instruction to cryogenic liquid pump.
Further, described method also includes cryogenic liquid pump running down rate-determining steps, including following sub-step：In low temperature When liquid pump does not carry out filling car, DCS controllers are lazy by Frequency Converter Control cryogenic liquid pump pump.
The beneficial effects of the invention are as follows：
（1）Cryogenic liquid pump automatic control system and method provided by the invention, by detection and control technology, solves low temperature Complex operation when liquid pump fills car, high are required to operating personnel, is easily damaged equipment, reduces operating personnel's burden.
（2）Cryogenic liquid pump automatic control system provided by the invention, by detection and linkage control system, solve low Superpressure when geothermal liquid pump fills car, it is super the security risk such as fill, leak and cryogenic liquid pump is comprehensively protected, effectively keep away The abnormal damage of pump is exempted from.
（3）Filled because all cryogenic liquid pumps are all connected on house steward, so any cryogenic liquid pump can be given Any one tank car filled on house steward is connected in be filled.The start-stop time of filling pump so can be effectively reduced, improves effect Rate and the service life for extending pump（Because largely abrasion all occurs in startup-shutdown filling pump）, and add fill it is flexible Property.
Brief description of the drawings
Fig. 1 is present system structure chart；
Fig. 2 is the inventive method flow chart.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：
As shown in figure 1, the control system that a kind of Intelligent Low Temperature liquid tank car fills, including it is DCS controllers, the device that weighs, low Geothermal liquid storage tank, cryogenic liquid pump, frequency converter, temperature detecting module, pressure detecting module and control valve；Described control valve bag Include liquid feed valve, return valve and outlet stop valve；
Described cryogenic liquid tank is connected with least one water influent pipeline, each water influent pipeline and at least one cryogenic liquid pump Connect, a liquid feed valve is provided with described water influent pipeline；Each cryogenic liquid pump passes through return line and Low Temperature Liquid Body storage tank is connected, and return valve is provided with described return line；Each cryogenic liquid pump is also connected with filling house steward, is filled House steward is connected by exporting stop valve with filling a tank car；
Temperature detecting module and pressure detecting module are additionally provided with cryogenic liquid pump exit, described filling also is set on house steward Pressure detecting module is equipped with, described cryogenic liquid pump passes through Frequency Converter Control；Described filling is additionally provided with the dress that weighs on position Put；The data output end of described temperature detecting module, pressure detecting module and the device that weighs is connected with DCS controllers, DCS The control output end of controller is connected with liquid feed valve, return valve, outlet stop valve and frequency converter respectively.
Filled because all cryogenic liquid pumps are all connected on house steward, so any cryogenic liquid pump can be connected in Any one tank car filled on house steward is filled.So can effectively reduce the start-stop time of filling pump, improve efficiency and Extend the service life of pump（Because largely abrasion all occurs in startup-shutdown filling pump）.
Specifically, as shown in figure 1, in the present embodiment, sharing three water influent pipelines and being connected with cryogenic liquid tank, wherein Model V1704, V1706 and V1708 are respectively arranged with first water influent pipeline, the second water influent pipeline and the 3rd water influent pipeline Liquid feed valve；First water influent pipeline connects 1# cryogenic liquid pumps, the second water influent pipeline connection 2# cryogenic liquid pumps and 3# cryogenic liquids Pump, the 3rd water influent pipeline connection 4# cryogenic liquid pumps and 5# cryogenic liquid pumps；Each cryogenic liquid pump by return line with Cryogenic liquid tank is connected, and return valve is provided with return line；Meanwhile each cryogenic liquid pump is total by filling Pipe fills recessing with 4 and is connected, wherein first fills in front of recessing the outlet stop valve for being provided with model V2026, second fills recessing Front is provided with model V2027 outlet stop valve, and the 3rd fills in front of recessing the outlet stop valve for being provided with V2028, and the 4th Fill in front of recessing and be provided with V2029 outlet stop valve；The device that weighs is realized by the way of truck scale.
More preferably, in the present embodiment, described system also includes the display control being connected with a DCS controllers dress Put：For displays temperature detection module, pressure detecting module, the detection data for the device that weighs, and liquid feed valve, return valve, go out The status data of mouth stop valve and frequency converter.Status data of the display control unit for remotely checking whole system, and In emergency circumstances realize remote control liquid feed valve, return valve, outlet stop valve and frequency converter.
More preferably, in the present embodiment, described DCS controllers include intelligent selection module：For according to the device that weighs The tank car incremental data beamed back, selects the cryogenic liquid pump of respective amount to be filled.
One of which situation in the present embodiment is：There is a tank car just to be filled the 3rd at recessing by 2# cryogenic liquid pumps Filled, and will be filled with（It can be judged according to the weight data for the device that weighs）, now there is an other tank car Fill at recessing in place and when meeting burner structure, can have been carried out simultaneously to two tank cars by 2# cryogenic liquid pumps second Fill simultaneously, avoid repeating start and stop pump；Meanwhile during filling, DCS controllers can be examined by filling the upper pressure of house steward Module is surveyed to judge to fill efficiency, when all return valve Close Alls, if it is relatively low to fill manifold pressure, DCS controllers A cryogenic liquid pump can be restarted（Such as 3# cryogenic liquid pumps）, improve and fill manifold pressure, raising fills efficiency.
Another situation in the present embodiment is：When four tank cars need quick fill, filled respectively first first Recessing, second fill recessing, the 3rd fill recessing and the 4th fill it is in place at recessing, now DCS controllers simultaneously start five Low Temperature Liquids Body pump（1# cryogenic liquid pumps, 2# cryogenic liquid pumps, 3# cryogenic liquid pumps, 4# cryogenic liquid pumps and 5# cryogenic liquid pumps）To four Tank car is quickly filled, and reduction fills the time.
More preferably, in the present embodiment, described DCS controllers include pump running down control module：For in the device that weighs Be not detected by tank car it is to be filled and detect tank car it is to be filled enter pre-cold state when, control cryogenic liquid pump running down.
Realization based on said system, the present embodiment also provide the control system that a kind of Intelligent Low Temperature liquid tank car fills Method, as shown in Fig. 2 filling flexible pipe installation steps, cryogenic liquid including tank car judgment step in place, precooling step, tank car Pump initiation step and fill car step；Described tank car judgment step in place includes following sub-step：
Multiple devices that weigh are detected to bearing weight in real time, and real-time testing result is sent to DCS controllers；Work as DCS When controller judges to detect that bearing weight meets preparatory condition, then respectively enter precooling step and tank car fills flexible pipe installation step Suddenly；
Described precooling step includes following sub-step：
S101：DCS controllers control liquid feed valve and return valve to be opened according to setting aperture；
S102：Temperature detecting module detects cryogenic liquid pump outlet temperature in real time, while DCS controllers are calculated to liquid feed valve and returned Stream valve sends the time span after control command；
S103：When the time span that the outlet temperature that DCS controllers are got falls below design temperature and calculated is more than When setting minimum pre-coo time, then it is assumed that precooling is completed, into cryogenic liquid pump initiation step；
It is qualified that precooling must be carried out before normal operation, otherwise will damage pump, to ensure that cryogenic liquid pump precooling is qualified, protection system System is provided with outlet temperature detection, pre-coo time protection, the anti-hypervelocity control of pump running down（Cryogenic liquid revolution speed in precooling process Control）, backflow valve opening adjustment, liquid feed valve standard-sized sheet protection.
Described cryogenic liquid pump initiation step includes following sub-step：
S201：DCS controllers start cryogenic liquid pump by frequency converter；
S202：Pressure detecting module detects cryogenic liquid pump discharge pressure in real time；
S203：DCS controllers receive cryogenic liquid pump discharge pressure data, and are judged：（1）If cryogenic liquid pump discharge pressure When power is less than preset value, DCS controllers judge to fill car pump as idling conditions, and DCS controllers control return valve is opened greatly, and returns to step Rapid S202；（2）If cryogenic liquid pump discharge pressure is more than preset value, DCS controllers control return valve is progressively closed；Progressively Judged during closing：If cryogenic liquid pump discharge pressure exceedes high report value（Prevent export pipeline superpressure, pressure height In high level, return valve is opened, and reduces exhaust duct pressure）, DCS controllers control return valve is opened and return to step S202, with drop Low exhaust duct pressure, manifold pressure is maintained the reflux in normal range (NR)；
Protection system is provided with outlet pressure detection, the adjustment of backflow valve opening, outlet pressure judgement, the protection of frequency converter rotational speed setup （DCS controllers control the stabilization of cryogenic liquid revolution speed）, liquid feed valve standard-sized sheet protection.
Filled because all cryogenic liquid pumps are all connected on house steward, so any cryogenic liquid pump can be connected in Any one tank car filled on house steward is filled.The start-stop time of cryogenic liquid pump so can be effectively reduced, improves effect Rate and the service life of extension pump simultaneously add the flexibility filled.
Described tank car, which fills flexible pipe installation steps, includes following sub-step：
S301：What operating personnel connected tank car fills flexible pipe；
S302：DCS controllers control outlet stop valve is opened；
Described car step of filling includes following sub-step：
S401：When DCS controllers judge that tank car fills the completion of flexible pipe installation steps, start to fill car；Wherein：（1）Transported stable Pump discharge pressure is provided with during row to control：After cryogenic liquid pump startup normal operation, cryogenic liquid pump discharge pressure surpasses When crossing 7bar, DCS controllers will control return valve to close；When cryogenic liquid pump discharge pressure is more than 12bar, then outlet pressure is inclined Height, DCS controllers control return valve are opened；（2）DCS controllers judge to fill effect by filling the upper pressure detecting module of house steward Rate, when all return valve Close Alls, if filled, manifold pressure is relatively low, and DCS controllers restart a Low Temperature Liquid Body pump, raising fill manifold pressure, and raising fills efficiency；（3）If filling manifold pressure exceedes high limit, DCS controllers pass through Frequency Converter Control cryogenic liquid pump running down；
S402：When DCS controllers receive when bearing weight and meeting preparatory condition of device transmission of weighing, then it is assumed that it is complete to fill car Finish, DCS controllers control outlet stop valve is closed；
S403：DCS controllers judge whether that also other vehicles are carrying out filling car, if then return to step S401, if No then DCS controllers return to tank car judgment step in place after sending pump running down instruction to cryogenic liquid pump.
More preferably, in the present embodiment, described method also includes cryogenic liquid pump running down rate-determining steps, including following son Step：When cryogenic liquid pump does not carry out filling car, DCS controllers send pump running down instruction to cryogenic liquid pump.
Wherein, return valve in pump precooling, open each demands such as pump and pump operation and have different apertures and effect side Formula.Precooling demands backflow valve opening is to operate the optimal aperture drawn repeatedly by process system, opens the backflow of pump stage Valve opening is needed according to outlet pressure, when pressure is less than outlet setting value, it is desirable to which return valve is opened greatly, the reaction side that PID is used Formula.When outlet pressure is higher than setting value, it is desirable to which return valve turns down, and PID uses reaction mode.Outlet pressure is prescribed a time limit higher than height, Require that return valve is opened greatly again, PID uses positive interaction mode.

Claims (6)

  1. A kind of 1. control system that Intelligent Low Temperature liquid tank car fills, it is characterised in that：Including DCS controllers, the device that weighs, Cryogenic liquid tank, cryogenic liquid pump, frequency converter, temperature detecting module, pressure detecting module and control valve；Described control valve Including liquid feed valve, return valve and outlet stop valve；
    Described cryogenic liquid tank is connected with least one water influent pipeline, each water influent pipeline and at least one cryogenic liquid pump Connect, a liquid feed valve is provided with described water influent pipeline；Each cryogenic liquid pump passes through return line and Low Temperature Liquid Body storage tank is connected, and return valve is provided with described return line；Each cryogenic liquid pump is also connected with filling house steward, is filled House steward is connected by exporting stop valve with filling a tank car；
    Temperature detecting module and pressure detecting module are additionally provided with cryogenic liquid pump exit, described filling also is set on house steward Pressure detecting module is equipped with, described cryogenic liquid pump passes through Frequency Converter Control；Described filling is additionally provided with the dress that weighs on position Put；The data output end of described temperature detecting module, pressure detecting module and the device that weighs is connected with DCS controllers, DCS The control output end of controller is connected with liquid feed valve, return valve, outlet stop valve and frequency converter respectively.
  2. 2. the control system that a kind of Intelligent Low Temperature liquid tank car according to claim 1 fills, it is characterised in that：It is described System also include a display control unit being connected with DCS controllers：For displays temperature detection module, pressure detecting mould The detection data of block, the device that weighs, and liquid feed valve, return valve, the status data for exporting stop valve and frequency converter.
  3. 3. the control system that a kind of Intelligent Low Temperature liquid tank car according to claim 1 fills, it is characterised in that：It is described DCS controllers include intelligent selection module：For the tank car incremental data beamed back according to the device that weighs, respective amount is selected Cryogenic liquid pump is filled.
  4. 4. the control system that a kind of Intelligent Low Temperature liquid tank car according to claim 1 fills, it is characterised in that：It is described DCS controllers include pump running down control module：It is to be filled and detect tank car for being not detected by tank car in the device that weighs During entrance pre-cold state to be filled, cryogenic liquid pump running down is controlled.
  5. 5. the side for the control system that a kind of Intelligent Low Temperature liquid tank car as described in any one in claim 1 ~ 4 fills Method, it is characterised in that：Including tank car judgment step in place, precooling step, tank car fills flexible pipe installation steps, cryogenic liquid pump opens Move step and fill car step；Described tank car judgment step in place includes following sub-step：
    Multiple devices that weigh are detected to bearing weight in real time, and real-time testing result is sent to DCS controllers；Work as DCS When controller judges to detect that bearing weight meets preparatory condition, then respectively enter precooling step and tank car fills flexible pipe installation step Suddenly；
    Described precooling step includes following sub-step：
    S101：DCS controllers control liquid feed valve and return valve to be opened according to setting aperture；
    S102：Temperature detecting module detects cryogenic liquid pump outlet temperature in real time, while DCS controllers are calculated to liquid feed valve and returned Stream valve sends the time span after control command；
    S103：When the time span that the outlet temperature that DCS controllers are got falls below design temperature and calculated is more than When setting minimum pre-coo time, then it is assumed that precooling is completed, into cryogenic liquid pump initiation step；
    Described cryogenic liquid pump initiation step includes following sub-step：
    S201：DCS controllers start cryogenic liquid pump by frequency converter；
    S202：Pressure detecting module detects cryogenic liquid pump discharge pressure in real time；
    S203：DCS controllers receive cryogenic liquid pump discharge pressure data, and are judged：（1）If cryogenic liquid pump discharge pressure When power is less than preset value, DCS controllers judge to fill car pump as idling conditions, and DCS controllers control return valve is opened greatly, and returns to step Rapid S202；（2）If cryogenic liquid pump discharge pressure is more than preset value, DCS controllers control return valve is progressively closed；Progressively Judged during closing：If cryogenic liquid pump discharge pressure exceedes high report value, DCS controllers control return valve is opened And return to step S202, to reduce exhaust duct pressure, manifold pressure is maintained the reflux in normal range (NR)；
    Described tank car, which fills flexible pipe installation steps, includes following sub-step：
    S301：What operating personnel connected tank car fills flexible pipe；
    S302：DCS controllers control outlet stop valve is opened；
    Described car step of filling includes following sub-step：
    S401：When DCS controllers judge that tank car fills the completion of flexible pipe installation steps, start to fill car；Wherein：（1）Transported stable Pump discharge pressure is provided with during row to control：After cryogenic liquid pump startup normal operation, cryogenic liquid pump discharge pressure surpasses When crossing 7bar, DCS controllers will control return valve to close；When cryogenic liquid pump discharge pressure is more than 12bar, then outlet pressure is inclined Height, DCS controllers control return valve are opened；（2）DCS controllers judge to fill effect by filling the upper pressure detecting module of house steward Rate, when all return valve Close Alls, if filled, manifold pressure is relatively low, and DCS controllers restart a Low Temperature Liquid Body pump, raising fill manifold pressure, and raising fills efficiency；（3）If filling manifold pressure exceedes high limit, DCS controllers pass through Frequency Converter Control cryogenic liquid pump running down；
    S402：When DCS controllers receive when bearing weight and meeting preparatory condition of device transmission of weighing, then it is assumed that it is complete to fill car Finish, DCS controllers control outlet stop valve is closed；
    S403：DCS controllers judge whether that also other vehicles are carrying out filling car, if then return to step S401, if No then DCS controllers return to tank car judgment step in place after sending pump running down instruction to cryogenic liquid pump.
  6. 6. according to the method for claim 5, it is characterised in that：Also include cryogenic liquid pump running down rate-determining steps, including with Lower sub-step：When cryogenic liquid pump does not carry out filling car, DCS controllers are lazy by Frequency Converter Control cryogenic liquid pump pump.
CN201711115460.9A 2017-11-13 2017-11-13 Intelligent low-temperature liquid tank car filling control system and method Active CN107673302B (en)

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Application Number Priority Date Filing Date Title
CN201711115460.9A CN107673302B (en) 2017-11-13 2017-11-13 Intelligent low-temperature liquid tank car filling control system and method

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Application Number Priority Date Filing Date Title
CN201711115460.9A CN107673302B (en) 2017-11-13 2017-11-13 Intelligent low-temperature liquid tank car filling control system and method

Publications (2)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108468946A (en) * 2018-05-24 2018-08-31 浙江智海化工设备工程有限公司 A kind of the automation charging system and automation methods for filling of low-temperature liquid storage tank
CN112050075A (en) * 2020-08-17 2020-12-08 杭州电子科技大学 Low-temperature liquid filling amount control device and filling method thereof
CN112343807A (en) * 2019-08-08 2021-02-09 内蒙古伊泰煤制油有限责任公司 Automatic control method and device for liquid oxygen pump

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008196687A (en) * 2007-01-15 2008-08-28 Taiyo Nippon Sanso Corp Low-temperature liquefied gas supply method and device
US20100307454A1 (en) * 2009-06-03 2010-12-09 Ford Global Technologies, Llc Fuel Distribution in Multi-Fuel Tank Compressed Gas Fuel Systems
CN101929602A (en) * 2010-04-29 2010-12-29 庞维龙 Gas filling substation as well as pipeline system, control system and control method thereof
CN201731265U (en) * 2010-07-29 2011-02-02 四川侨源气体有限公司 Gas filling device
CN105909969A (en) * 2016-06-20 2016-08-31 浙江智海化工设备工程有限公司 Zero-emission filling device for cryogenic liquid tank car and filling method of zero-emission filling device
CN205560278U (en) * 2016-04-04 2016-09-07 鞍钢股份有限公司 Diffuse argon gas recovery unit
CN106240434A (en) * 2016-09-21 2016-12-21 杭州双业能源设备有限公司 The anti-overcharge Protection control system of groove tank car, storage tank and anti-overcharge guard method
CN207877245U (en) * 2017-11-13 2018-09-18 阿坝汶川侨源气体有限公司 The control system that Intelligent Low Temperature liquid tank car fills

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008196687A (en) * 2007-01-15 2008-08-28 Taiyo Nippon Sanso Corp Low-temperature liquefied gas supply method and device
US20100307454A1 (en) * 2009-06-03 2010-12-09 Ford Global Technologies, Llc Fuel Distribution in Multi-Fuel Tank Compressed Gas Fuel Systems
CN101929602A (en) * 2010-04-29 2010-12-29 庞维龙 Gas filling substation as well as pipeline system, control system and control method thereof
CN201731265U (en) * 2010-07-29 2011-02-02 四川侨源气体有限公司 Gas filling device
CN205560278U (en) * 2016-04-04 2016-09-07 鞍钢股份有限公司 Diffuse argon gas recovery unit
CN105909969A (en) * 2016-06-20 2016-08-31 浙江智海化工设备工程有限公司 Zero-emission filling device for cryogenic liquid tank car and filling method of zero-emission filling device
CN106240434A (en) * 2016-09-21 2016-12-21 杭州双业能源设备有限公司 The anti-overcharge Protection control system of groove tank car, storage tank and anti-overcharge guard method
CN207877245U (en) * 2017-11-13 2018-09-18 阿坝汶川侨源气体有限公司 The control system that Intelligent Low Temperature liquid tank car fills

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108468946A (en) * 2018-05-24 2018-08-31 浙江智海化工设备工程有限公司 A kind of the automation charging system and automation methods for filling of low-temperature liquid storage tank
CN112343807A (en) * 2019-08-08 2021-02-09 内蒙古伊泰煤制油有限责任公司 Automatic control method and device for liquid oxygen pump
CN112050075A (en) * 2020-08-17 2020-12-08 杭州电子科技大学 Low-temperature liquid filling amount control device and filling method thereof
CN112050075B (en) * 2020-08-17 2022-03-08 杭州电子科技大学 Low-temperature liquid filling amount control device and filling method thereof

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