CN114893720A - Hydrogenation precooling system and method for hydrogenation station - Google Patents

Hydrogenation precooling system and method for hydrogenation station Download PDF

Info

Publication number
CN114893720A
CN114893720A CN202210589433.XA CN202210589433A CN114893720A CN 114893720 A CN114893720 A CN 114893720A CN 202210589433 A CN202210589433 A CN 202210589433A CN 114893720 A CN114893720 A CN 114893720A
Authority
CN
China
Prior art keywords
heat exchanger
heat exchange
hydrogenation
hydrogen
pipeline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210589433.XA
Other languages
Chinese (zh)
Other versions
CN114893720B (en
Inventor
李明昕
周亮
田冠亚
李俊杰
黄景龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengxing Hydrogen Electric Technology Zhengzhou Co ltd
Original Assignee
Zhengxing Hydrogen Electric Technology Zhengzhou Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengxing Hydrogen Electric Technology Zhengzhou Co ltd filed Critical Zhengxing Hydrogen Electric Technology Zhengzhou Co ltd
Priority to CN202210589433.XA priority Critical patent/CN114893720B/en
Publication of CN114893720A publication Critical patent/CN114893720A/en
Application granted granted Critical
Publication of CN114893720B publication Critical patent/CN114893720B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F17C9/04—Recovery of thermal energy
    • 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
    • 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
    • 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
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • 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
    • 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
    • F17D1/14—Conveying liquids or viscous products by pumping
    • 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
    • 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
    • F17C2221/012—Hydrogen
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0316—Water heating
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • F17C2227/0348—Water cooling
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/039—Localisation of heat exchange separate on the pipes
    • 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
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • 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
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • 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
    • F17C2260/046—Enhancing energy recovery
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/063—Fluid distribution for supply of refueling stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/45—Hydrogen technologies in production processes

Abstract

The invention discloses a hydrogenation precooling system and a hydrogenation precooling method for a hydrogenation station, and aims to solve the technical problem that the prior art can cause large energy waste in the hydrogenation precooling process. The precooling system mainly comprises a liquid hydrogen storage tank, a plunger pump, a first heat exchanger, a vaporizer, a sequence control panel, a second heat exchanger and a hydrogenation machine which are sequentially connected through a conveying pipeline, wherein a heat exchange circulating system is arranged between the first heat exchanger and the second heat exchanger to recycle heat released in the liquid hydrogen vaporization process, the precooling system further comprises a control unit, the control unit comprises a plurality of pressure transmitters, a plurality of temperature transmitters and a PLC (programmable logic controller), and the PLC controller passes through temperature information collected by the temperature transmitters and pressure information collected by the pressure transmitters to control the opening and closing of a valve and the heat exchange circulating system. The method is implemented based on the pre-cooling system. The invention has simple and convenient operation and easy realization, reduces energy consumption and avoids energy waste.

Description

Hydrogenation precooling system and method for hydrogenation station
Technical Field
The invention relates to the technical field of new energy, in particular to a hydrogenation precooling system and a hydrogenation precooling method for a hydrogenation station.
Background
The hydrogen energy is regarded as important secondary energy in the new century because of the characteristics of high energy-containing property, high energy conversion rate, zero carbon emission and the like, becomes the key point of energy strategic transfer and research of all countries, and provides an effective method for solving energy crisis.
The hydrogen adding station usually adds hydrogen by three pressure adding modes of low pressure, medium pressure and high pressure, hydrogen expands in the hydrogen storage bottle through the electromagnetic valve, and due to the coke-soup effect of the hydrogen, the adding speed is high, and the vehicle-mounted hydrogen storage system can not timely dissipate heat, so that the temperature of the hydrogen storage bottle exceeds the highest working temperature. The carbon fiber aluminum liner winding hydrogen cylinder which is universal internationally at present has the highest working temperature of 85 ℃, and practical application finds that when the environmental temperature in summer is higher, the initial temperature of the hydrogen storage cylinder and the injected hydrogen is higher, the hydrogen storage cylinder temperature exceeds the highest working temperature due to the excessively high hydrogenation rate, and the risks of damage to the hydrogen storage cylinder, hydrogen leakage and the like exist.
Therefore, the hydrogen gas needs to be precooled before being filled, the existing mode is to directly precool the hydrogenation machine by using a water chilling unit, and the hydrogen gas needs relatively high heat exchange amount during precooling, so that great energy waste is caused.
The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The inventor finds out through research that: the cold water unit is utilized to pre-cool the hydrogenation machine, so that great energy waste is caused, when hydrogen exists in a liquid hydrogen form, high-grade cold energy is provided, and if the cold energy of the liquid hydrogen is fully utilized, the hydrogenation machine is pre-cooled, so that the energy consumption can be reduced, and the greenhouse effect can be reduced.
In view of at least one of the above technical problems, the present disclosure provides a hydrogenation precooling system and method for a hydrogenation station, in which liquid hydrogen is vaporized into hydrogen gas to enter a hydrogenation machine by performing heat exchange step by step, so as to ensure that the temperature of the hydrogen gas is low, namely, precooling of the hydrogenation machine is completed, recycling of energy is realized, and energy consumption is reduced.
According to one aspect of the disclosure, a hydrogenation precooling system of a hydrogenation station is provided, which comprises a liquid hydrogen storage tank, wherein the liquid hydrogen storage tank is sequentially connected with a plunger pump, a first heat exchanger, a vaporizer, a sequence control panel, a second heat exchanger and a hydrogenation machine through a conveying pipeline;
a heat exchange circulating system is arranged between the first heat exchanger and the second heat exchanger, the heat exchange circulating system comprises a water cooling tank, the water cooling tank is connected with the first heat exchanger through a first circulating pipeline, and the water cooling tank is connected with the second heat exchanger through a second circulating pipeline;
the conveying pipeline, the first circulating pipeline and the second circulating pipeline are provided with a plurality of valves for controlling the opening and closing of the pipelines;
and the control unit comprises a PLC (programmable logic controller), a plurality of temperature transmitters and a plurality of pressure transmitters, wherein the PLC controls the opening and closing of the valve and the heat exchange circulating system through the temperature information collected by the temperature transmitters and the pressure information collected by the pressure transmitters.
In some embodiments of the present disclosure, the first circulation line comprises a first output line flowing from the water cooled tank to the first heat exchanger and a first return line returning from the first heat exchanger to the water cooled tank;
the second circulating pipeline comprises a second output pipeline flowing from the water cooling tank to the second heat exchanger and a second return pipeline returning from the second heat exchanger to the water cooling tank;
and circulating pumps which are electrically connected with the control unit and controlled by the control unit are arranged on the first return pipeline and the second return pipeline.
In some embodiments of the present disclosure, at least one temperature transmitter is disposed on each of the first output pipeline, the first return pipeline, the second output pipeline, and the second return pipeline.
In some embodiments of the present disclosure, the temperature transmitter, the pressure transmitter and the valve are disposed on the conveying pipeline between the plunger pump and the heat exchanger;
an additional pipeline is communicated between the plunger pump and the vaporizer, and a valve for controlling the opening and closing of the additional pipeline is arranged on the additional pipeline;
and the PLC controls the opening and closing of the valve according to the information of the temperature transmitter and the pressure transmitter so as to control the flow pipeline of the liquid hydrogen.
In some embodiments of the present disclosure, an auxiliary heater and a safety valve are disposed between the vaporizer and the sequence control panel, and the sequence control panel is further communicated with a hydrogen storage device, where the hydrogen storage device includes a low-pressure hydrogen storage device, a medium-pressure hydrogen storage device, and a high-pressure hydrogen storage device, and the sequence control panel controls hydrogen to perform sequential hydrogen storage and sequential hydrogen fetching of the hydrogenation machine.
In some embodiments of the present disclosure, the types of valves include one or more of a check valve, a plug valve, a pressure relief valve, a solenoid valve, a pneumatic valve, a hand valve; the first heat exchanger is used for heat exchange between liquid hydrogen and a refrigerant, namely liquid-liquid heat exchange, and recycling cold energy of the liquid hydrogen through the refrigerant, and the second heat exchanger is used for a hydrogenation heat exchanger and is used for cooling hydrogen by using the refrigerant after the liquid hydrogen heat exchange, namely liquid-gas heat exchange.
In some embodiments of the present disclosure, the refrigerant medium in the water cooling tank is a glycol aqueous solution, and the heat exchange circulation system is equipped with an emergency stop button to stop operation in case of emergency.
According to another aspect of the present disclosure, a hydrogen refueling precooling method for a hydrogen refueling station, which is implemented based on the hydrogen refueling precooling system for the hydrogen refueling station, includes the following steps:
(1) pressurizing and pumping the liquid hydrogen to a first heat exchanger through a plunger pump, carrying out primary heat exchange through a first circulating pipeline of a heat exchange circulating system, and storing cold energy of the liquid hydrogen by using a refrigerant in a water cooling tank;
(2) the liquid hydrogen after primary heat exchange of the first heat exchanger enters a vaporizer for vaporization and is controlled by a sequence control panel to be stored in a hydrogen storage device in sequence;
(3) before hydrogen enters the hydrogenation machine, the hydrogen enters a second heat exchanger for secondary heat exchange, and a refrigerant after the primary heat exchange cools the hydrogen through a second circulation pipeline of a heat exchange circulation system, so that the inlet air temperature of the hydrogenation machine is lower than-40 ℃.
In some embodiments of the present disclosure, the control logic for turning on and off the heat exchange circulation system is: when a temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is higher than-40 ℃, the PLC controller turns on the circulating pump to enable the heat exchange circulating system to start to operate; when a temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is less than-42 ℃, the PLC controller turns off the circulating pump to stop the heat exchange circulating system; when the temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is higher than-38 ℃, the PLC controller turns on the circulating pump again to enable the heat exchange circulating system to start to operate, and the operation is repeated.
In some embodiments of the present disclosure, when the plunger pump is not running, the heat exchange cycle system will be out of service; when the emergency stop button is manually pressed in an emergency, the heat exchange circulating system is stopped emergently.
One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:
1. this application is through heat transfer step by step to liquid hydrogen, stores the cold energy of liquid hydrogen to the refrigerant in, is used for the cooling of hydrogen with the cold energy in the refrigerant again to make full use of the cold energy of liquid hydrogen, realized the recycle of the energy, reduced the energy resource consumption of hydrogenation machine precooling in-process, avoided the energy extravagant.
2. This application utilizes the heat exchanger to carry out the heat transfer to liquid hydrogen, recycles the vaporizer and makes its vaporization, and system structure is simple, easily realizes, and degree of automation is high, and maneuverability is strong.
Drawings
Fig. 1 is a schematic diagram of a pre-cooling system according to an embodiment of the present disclosure.
Fig. 2 is a flow chart of a method according to an embodiment of the present application.
FIG. 3 is a flow chart illustrating logic control of a heat exchange cycle system according to an embodiment of the present disclosure;
in the above figures, 1 is a liquid hydrogen storage tank, 2 is a plunger pump, 21 is a check valve, 22 and 23 are plug valves, 3 is a first heat exchanger, 4 is a vaporizer, 45 is an auxiliary heater, 41 is a safety valve, 5 is a sequence control plate, 6 is a second heat exchanger, 7 is a hydrogenation machine, 8 is a heat exchange circulation system, 81 is a water cooling tank, 82 and 83 are circulation pumps, 9 is a hydrogen storage container, PT101, PT102 and PT103 are pressure transmitters, and TT101, TT102, TT103, TT104, TT105, TT106, TT107, TT108 and TT109 are temperature transmitters.
Detailed Description
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application. References in this application to "first," "second," etc. are used to distinguish between the objects described and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application includes both direct and indirect connections (couplings), unless otherwise specified.
The unit modules and sensors in the following examples are all conventional commercial products unless otherwise specified.
The embodiment of the application provides a hydrogenation precooling system and a hydrogenation precooling method for a hydrogenation station, solves the technical problem of great energy waste caused in the precooling process of a hydrogenation machine in the prior art, and realizes energy recycling by fully utilizing cold energy released by vaporization of liquid hydrogen, thereby reducing energy consumption and avoiding energy waste.
In order to solve the problem of the energy waste, the technical scheme in the embodiment of the application has the following general idea:
the liquid hydrogen is subjected to gradual heat exchange through the two heat exchangers, a heat exchange circulating system is arranged between the heat exchangers, and the opening and closing of the heat exchange circulating system are controlled by a PLC (programmable logic controller) so that the temperature of the liquid hydrogen reaches a standard, cold energy of the liquid hydrogen is stored by using a refrigerant in a water cooling tank, the hydrogen entering a hydrogenation machine is cooled, the air inlet temperature of the hydrogenation machine is lower than-40 ℃, and therefore the cold energy of the liquid hydrogen is recycled, and the precooling of the hydrogenation machine is completed.
The heat exchange circulating system adopts a water circulating system of a circulating pump, wherein the refrigerant is ethylene glycol aqueous solution, the temperature of liquid hydrogen is collected by a temperature transmitter and a pressure transmitter which are arranged on a pipeline, and the opening and closing of the circulating pump are controlled by a PLC (programmable logic controller) so as to complete the circulating heat exchange of the heat exchange circulating system.
The temperature of the hydrogen after the gradual heat exchange reaches the precooling standard, a water chilling unit is not needed for precooling, and the hydrogen can be directly distributed into a vehicle-mounted hydrogen storage tank through a hydrogenation machine for use by vehicles, so that the technical problem of energy waste in the hydrogenation precooling process in the prior art is solved.
For better understanding of the technical solutions of the present application, the technical solutions will be described in detail below with reference to the drawings and specific embodiments.
Example one
The embodiment discloses a hydrogenation precooling system of a hydrogenation station, which is shown in a figure 1 and comprises a liquid hydrogen storage tank and a control unit, wherein the liquid hydrogen storage tank is sequentially connected with a plunger pump, a first heat exchanger, a vaporizer, a sequence control panel, a second heat exchanger and a hydrogenation machine through a conveying pipeline; and the control unit comprises a plurality of temperature transmitters, a plurality of pressure transmitters and a PLC (programmable logic controller), and the PLC controls the opening and closing of the valve and the heat exchange circulating system through the temperature information collected by the temperature transmitters and the pressure information collected by the pressure transmitters.
The conveying pipeline, the first circulating pipeline and the second circulating pipeline are provided with a plurality of valves for controlling the opening and closing of the pipelines; specifically, liquid hydrogen in the liquid hydrogen storage tank is pumped to the first heat exchanger through the plunger pump, a one-way valve is arranged on a conveying pipeline between the plunger pump and the first heat exchanger, the pressure and the temperature of the liquid hydrogen are detected by a pressure transmitter PT101 and a temperature transmitter TT101 which are arranged on the conveying pipeline after the liquid hydrogen passes through the one-way valve, and the liquid hydrogen enters the first heat exchanger through a plug valve 22 arranged on the conveying pipeline for primary heat exchange under normal conditions and then enters a vaporizer for vaporization; if primary heat exchange is not needed or the first heat exchanger is damaged, the waste heat is directly fed into the vaporizer for vaporization through a plug valve 23 arranged on the additional pipeline; regardless of the line from which the liquid hydrogen enters the vaporizer, the temperature and pressure are re-detected before entering the vaporizer, and therefore, a pressure transmitter PT102 and a temperature transmitter TT104 are provided on the delivery line in front of the vaporizer.
An auxiliary heater is arranged between the vaporizer and the sequence control panel, a safety valve, a pressure transmitter PT103 and a temperature transmitter TT105 for monitoring pressure and temperature are arranged on a conveying pipeline between the auxiliary heater and the sequence control panel, the sequence control panel is also communicated with a hydrogen storage device, after liquid hydrogen is compressed and vaporized by the vaporizer, the sequence control panel controls the hydrogen to sequentially enter and be stored in the high-pressure, medium-pressure and low-pressure hydrogen storage devices, a pressure transmitter for detecting the pressure of the hydrogen storage device is arranged in the hydrogen storage device, when the pressure is insufficient (the high pressure is lower than 37MPa, the medium pressure is lower than 28MPa, the low pressure is lower than 18MPa, and the pressure limit can be set), the plunger pump automatically operates to store the hydrogen, and when the pressure reaches 45MPa, the plunger pump stops working; when a vehicle needs hydrogenation, the hydrogenation machine sequentially takes gas from the low-pressure, medium-pressure and high-pressure hydrogen storage devices, so that the rapid filling of hydrogen is realized; when the pressure of the transducer PT103 is more than 47MPa, the plunger pump stops working to prevent overpressure; the temperature transmitter TT105 is used for detecting the temperature of the hydrogen entering the sequence control panel, when the temperature of the hydrogen is lower than-35 ℃ (taking the design lowest temperature of the hydrogen storage device as-40 ℃), the auxiliary heater is started, and when the temperature of the hydrogen is lower than-40 ℃), the plunger pump stops working; a temperature transmitter TT108 for detecting temperature is arranged between the sequence control panel and the second heat exchanger, and a temperature transmitter TT109 for detecting the internal temperature of the hydrogenation unit is arranged in the hydrogenation unit; in addition, the control system of the hydrogenation machine can ensure that the temperature of hydrogen filled into the vehicle-mounted gas cylinder does not exceed 85 ℃, and once the temperature exceeds the temperature, the hydrogenation machine stops hydrogenation.
A heat exchange circulating system is arranged between the first heat exchanger and the second heat exchanger, the heat exchange circulating system comprises a water cooling tank, the water cooling tank is connected with the first heat exchanger through a first circulating pipeline, and the water cooling tank is connected with the second heat exchanger through a second circulating pipeline; further, the first circulation pipeline comprises a first output pipeline flowing from the water cooling tank to the first heat exchanger and a first return pipeline returning from the first heat exchanger to the water cooling tank; the second circulating pipeline comprises a second output pipeline flowing from the water cooling tank to the second heat exchanger and a second return pipeline returning from the second heat exchanger to the water cooling tank; and the first return pipeline and the second return pipeline are provided with a first circulating pump and a second circulating pump which are electrically connected with the control unit and controlled by the control unit. Temperature transmitters TT102, TT103, TT106 and TT107 for detecting the temperature of the pipeline are respectively arranged on the first output pipeline, the first return pipeline, the second output pipeline and the second return pipeline; in addition, the heat exchange circulation system is provided with an emergency stop button so as to stop the operation in an emergency.
As shown in fig. 3, the logic control flow of the heat exchange cycle system is as follows: when the temperature transmitter detects that the temperature is higher than-40 ℃, the PLC controller opens the circulating pump to enable the heat exchange circulating system to start to operate; when the temperature transmitter detects that the temperature is less than-42 ℃, the PLC controller turns off the circulating pump to stop the heat exchange circulating system; when the temperature transmitter detects that the temperature is less than-38 ℃, the PLC controller turns on the circulating pump again to enable the heat exchange circulating system to start to operate, and the circulation is repeated in such a way to store the liquid hydrogen cold energy and pre-cool the hydrogenation machine. When the plunger pump stops running, the heat exchange circulation system stops running; when the emergency stop button is manually pressed in an emergency, the heat exchange circulating system is stopped emergently.
Example two
The embodiment discloses a hydrogenation pre-cooling method for a hydrogenation station, which mainly comprises the following steps of:
(1) liquid hydrogen is pressurized and pumped to the first heat exchanger through the plunger pump, primary heat exchange is carried out through a first circulating pipeline of the heat exchange circulating system, and cold energy of the liquid hydrogen is stored by utilizing a refrigerant in the water cooling tank.
(2) The liquid hydrogen after primary heat exchange of the first heat exchanger enters a vaporizer for vaporization, and is controlled by a sequence control panel to be stored in a hydrogen storage device in sequence.
(3) Before hydrogen enters the hydrogenation machine, hydrogen enters the second heat exchanger for secondary heat exchange, and the coolant subjected to primary heat exchange is used for cooling the hydrogen through the second circulation pipeline of the heat exchange circulation system, so that the inlet air temperature of the hydrogenation machine is lower than-40 ℃.
The specific control logic of the heat exchange circulating system is as follows: when a temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is higher than-40 ℃, the PLC controller turns on the circulating pump to enable the heat exchange circulating system to start to operate; when a temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is less than-42 ℃, the PLC controller turns off the circulating pump to stop the heat exchange circulating system; when a temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is higher than-38 ℃, the PLC controller turns on the circulating pump again to enable the heat exchange circulating system to start to operate, and the operation is repeated; in addition, when the plunger pump stops running, the heat exchange circulation system stops running; when the emergency stop button is manually pressed in an emergency, the heat exchange circulating system is stopped emergently.
While certain preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present application and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A hydrogenation precooling system of a hydrogenation station is characterized by comprising a liquid hydrogen storage tank, wherein the liquid hydrogen storage tank is sequentially connected with a plunger pump, a first heat exchanger, a vaporizer, a sequence control panel, a second heat exchanger and a hydrogenation machine through a conveying pipeline;
a heat exchange circulating system is arranged between the first heat exchanger and the second heat exchanger, the heat exchange circulating system comprises a water cooling tank, the water cooling tank is connected with the first heat exchanger through a first circulating pipeline, and the water cooling tank is connected with the second heat exchanger through a second circulating pipeline;
the conveying pipeline, the first circulating pipeline and the second circulating pipeline are provided with a plurality of valves for controlling the opening and closing of the pipelines;
and the control unit comprises a PLC (programmable logic controller), a plurality of temperature transmitters and a plurality of pressure transmitters, wherein the PLC controls the opening and closing of the valve and the heat exchange circulating system through the temperature information collected by the temperature transmitters and the pressure information collected by the pressure transmitters.
2. The hydroprocessing precooling system of claim 1, wherein the first circulation line comprises a first output line from the water-cooled tank to the first heat exchanger and a first return line from the first heat exchanger back to the water-cooled tank;
the second circulating pipeline comprises a second output pipeline flowing from the water cooling tank to the second heat exchanger and a second return pipeline returning from the second heat exchanger to the water cooling tank;
and circulating pumps which are electrically connected with the control unit and controlled by the control unit are arranged on the first return pipeline and the second return pipeline.
3. The system of claim 2, wherein at least one temperature transmitter is disposed on each of the first output pipeline, the first return pipeline, the second output pipeline, and the second return pipeline.
4. The hydrogenation precooling system of the hydrogen station of claim 1, wherein the temperature transmitter, the pressure transmitter and the valve are arranged on a delivery pipeline between the plunger pump and the heat exchanger;
an additional pipeline is communicated between the plunger pump and the vaporizer, and a valve for controlling the opening and the closing of the additional pipeline is arranged on the additional pipeline;
and the PLC controls the opening and closing of the valve according to the information of the temperature transmitter and the pressure transmitter so as to control the flow pipeline of the liquid hydrogen.
5. The system of claim 1, wherein an auxiliary heater and a safety valve are disposed between the vaporizer and the sequence control panel, and the sequence control panel is further connected to a hydrogen storage device, the hydrogen storage device includes a low-pressure, medium-pressure, and high-pressure hydrogen storage device, and the sequence control panel controls hydrogen to store hydrogen in sequence and the hydrogenation unit to take hydrogen in sequence.
6. The hydrogenation precooling system of claim 1, wherein the types of valves include one or more of a check valve, a plug valve, a pressure relief valve, a solenoid valve, a pneumatic valve, and a hand valve; the first heat exchanger is used for heat exchange between liquid hydrogen and a refrigerant, namely liquid-liquid heat exchange, and recycling cold energy of the liquid hydrogen through the refrigerant, and the second heat exchanger is used for a hydrogenation heat exchanger and is used for cooling hydrogen by using the refrigerant after the liquid hydrogen heat exchange, namely liquid-gas heat exchange.
7. The hydrogenation precooling system for a hydrogen plant as recited in claim 1, wherein the coolant medium in the water cooling tank is an aqueous ethylene glycol solution, and the heat exchange circulation system is equipped with an emergency stop button to stop the operation in an emergency.
8. A hydrogenation precooling method for a hydrogen refueling station, which is implemented based on the hydrogenation precooling system for the hydrogen refueling station of claim 1, and is characterized by comprising the following steps of:
(1) pressurizing and pumping the liquid hydrogen to a first heat exchanger through a plunger pump, carrying out primary heat exchange through a first circulating pipeline of a heat exchange circulating system, and storing cold energy of the liquid hydrogen by using a refrigerant in a water cooling tank;
(2) the liquid hydrogen after primary heat exchange of the first heat exchanger enters a vaporizer for vaporization and is controlled by a sequence control panel to be stored in a hydrogen storage device in sequence;
(3) before hydrogen enters the hydrogenation machine, the hydrogen enters a second heat exchanger for secondary heat exchange, and a refrigerant after the primary heat exchange cools the hydrogen through a second circulation pipeline of a heat exchange circulation system, so that the inlet air temperature of the hydrogenation machine is lower than-40 ℃.
9. The hydrogenation precooling method for the hydrogen refueling station as recited in claim 8, wherein the control logic for opening and closing the heat exchange circulation system is as follows: when a temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is higher than-40 ℃, the PLC controller turns on the circulating pump to enable the heat exchange circulating system to start to operate; when a temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is less than-42 ℃, the PLC controller turns off the circulating pump to stop the heat exchange circulating system; when the temperature transmitter arranged between the water cooling tank and the second heat exchanger detects that the temperature is higher than-38 ℃, the PLC controller turns on the circulating pump again to enable the heat exchange circulating system to start to operate, and the operation is repeated.
10. The hydroprocessing precooling method of claim 8, wherein when the plunger pump is stopped, the heat exchange cycle system is stopped; when the emergency stop button is manually pressed in an emergency, the heat exchange circulating system is stopped emergently.
CN202210589433.XA 2022-05-27 2022-05-27 Hydrogenation pre-cooling system and method for hydrogenation station Active CN114893720B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210589433.XA CN114893720B (en) 2022-05-27 2022-05-27 Hydrogenation pre-cooling system and method for hydrogenation station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210589433.XA CN114893720B (en) 2022-05-27 2022-05-27 Hydrogenation pre-cooling system and method for hydrogenation station

Publications (2)

Publication Number Publication Date
CN114893720A true CN114893720A (en) 2022-08-12
CN114893720B CN114893720B (en) 2024-04-19

Family

ID=82725936

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210589433.XA Active CN114893720B (en) 2022-05-27 2022-05-27 Hydrogenation pre-cooling system and method for hydrogenation station

Country Status (1)

Country Link
CN (1) CN114893720B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024059099A1 (en) * 2022-09-15 2024-03-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and system for filling tanks of hydrogen-fueled vehicles

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080185068A1 (en) * 2007-01-04 2008-08-07 Joseph Perry Cohen Hydrogen dispensing station and method of operating the same
US20100193045A1 (en) * 2007-07-12 2010-08-05 Huanen Xu Low consumption and intelligent safe gas-supply system for gas tanks
US20150233247A1 (en) * 2012-09-18 2015-08-20 Basf Se Method and system for generating energy during the expansion of natural process gas
CN207438138U (en) * 2017-10-21 2018-06-01 张家港富瑞氢能装备有限公司 It is a kind of vehicle-mounted from pressure and low-temperature liquid hydrogen air supply system
EP3457019A1 (en) * 2017-09-15 2019-03-20 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Gas supply device and method for starting operation of gas supply device
CN109708000A (en) * 2019-02-25 2019-05-03 北方工业大学 A kind of L-CH2 type hydrogenation stations heat management system
CN110671840A (en) * 2019-10-10 2020-01-10 北京建筑大学 Heat, power and cold combined supply system based on liquefied natural gas gasification cold energy and operation method
CN112555675A (en) * 2021-01-12 2021-03-26 江苏国富氢能技术装备股份有限公司 Consumption-reducing hydrogen filling system of liquid hydrogen storage and transportation type hydrogen filling station
CN112682691A (en) * 2021-01-12 2021-04-20 江苏国富氢能技术装备股份有限公司 Hydrogen filling system for liquid hydrogen storage and transportation type hydrogen filling station
CN113309984A (en) * 2021-06-26 2021-08-27 正星氢电科技郑州有限公司 Automatic purging and replacing system and method for hydrogen-related pipe valve testing gas circuit structure
CN113531388A (en) * 2021-08-06 2021-10-22 液空厚普氢能源装备有限公司 System and method for recycling cold energy of liquid hydrogen refueling station
CN215862878U (en) * 2021-07-30 2022-02-18 正星氢电科技郑州有限公司 Hydrogen supply system pipeline
CN114526443A (en) * 2022-04-22 2022-05-24 浙江浙能航天氢能技术有限公司 Control system for hydrogen switching

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080185068A1 (en) * 2007-01-04 2008-08-07 Joseph Perry Cohen Hydrogen dispensing station and method of operating the same
US20100193045A1 (en) * 2007-07-12 2010-08-05 Huanen Xu Low consumption and intelligent safe gas-supply system for gas tanks
US20150233247A1 (en) * 2012-09-18 2015-08-20 Basf Se Method and system for generating energy during the expansion of natural process gas
EP3457019A1 (en) * 2017-09-15 2019-03-20 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Gas supply device and method for starting operation of gas supply device
CN207438138U (en) * 2017-10-21 2018-06-01 张家港富瑞氢能装备有限公司 It is a kind of vehicle-mounted from pressure and low-temperature liquid hydrogen air supply system
CN109708000A (en) * 2019-02-25 2019-05-03 北方工业大学 A kind of L-CH2 type hydrogenation stations heat management system
CN110671840A (en) * 2019-10-10 2020-01-10 北京建筑大学 Heat, power and cold combined supply system based on liquefied natural gas gasification cold energy and operation method
CN112555675A (en) * 2021-01-12 2021-03-26 江苏国富氢能技术装备股份有限公司 Consumption-reducing hydrogen filling system of liquid hydrogen storage and transportation type hydrogen filling station
CN112682691A (en) * 2021-01-12 2021-04-20 江苏国富氢能技术装备股份有限公司 Hydrogen filling system for liquid hydrogen storage and transportation type hydrogen filling station
CN113309984A (en) * 2021-06-26 2021-08-27 正星氢电科技郑州有限公司 Automatic purging and replacing system and method for hydrogen-related pipe valve testing gas circuit structure
CN215862878U (en) * 2021-07-30 2022-02-18 正星氢电科技郑州有限公司 Hydrogen supply system pipeline
CN113531388A (en) * 2021-08-06 2021-10-22 液空厚普氢能源装备有限公司 System and method for recycling cold energy of liquid hydrogen refueling station
CN114526443A (en) * 2022-04-22 2022-05-24 浙江浙能航天氢能技术有限公司 Control system for hydrogen switching

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张磊 张雪: "物流与供应链管理", 北京理工大学出版社, pages: 187 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024059099A1 (en) * 2022-09-15 2024-03-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and system for filling tanks of hydrogen-fueled vehicles

Also Published As

Publication number Publication date
CN114893720B (en) 2024-04-19

Similar Documents

Publication Publication Date Title
CN112682691B (en) Hydrogen filling system for liquid hydrogen storage and transportation type hydrogen filling station
CN113531388B (en) System and method for recycling cold energy of liquid hydrogen refueling station
CN211315766U (en) Hydrogen filling system
CN110594579B (en) Multifunctional hydrogen refueling station hydrogen fuel refueling system
CN111006129B (en) Hydrogenation precooling control method and system for hydrogenation station
CN112483887A (en) Buried liquid hydrogen storage type hydrogenation device
CN111256028A (en) Hydrogen filling system
CN214249133U (en) Liquid hydrogen storage type hydrogenation device adopting liquid hydrogen precooling
CN114893720B (en) Hydrogenation pre-cooling system and method for hydrogenation station
CN107128150A (en) A kind of cool-storage type LNG heavy trucks cold energy use air-conditioning system
CN113074315B (en) Heat management system and heat management control method of hydrogen station
CN214093991U (en) Vehicle-mounted solid hydrogen storage and supply system
CN112902015A (en) Hydrogenation station and hydrogenation method
CN112555675A (en) Consumption-reducing hydrogen filling system of liquid hydrogen storage and transportation type hydrogen filling station
CN109916135A (en) It is a kind of for small gas liquefying plant without pump circulation method
CN114893719B (en) BOG gas recovery system and method for hydrogenation and liquefied natural gas combined building station
CN214249132U (en) Buried liquid hydrogen storage type hydrogenation device
CN213810009U (en) Double-gun filling system of hydrogenation machine
CN112963733B (en) Hydrogenation machine front hydrogen cooling method
CN205523551U (en) LNG is cold energy recycle system for refrigerator car
CN205137064U (en) Liquefied natural gas tank wagon that liquefied natural gas and CNG built station jointly device of unloading
CN214535671U (en) Consumption-reducing hydrogen filling system of liquid hydrogen storage and transportation type hydrogen filling station
CN214619059U (en) Cooling system for hydrogenation station pipeline
CN219995052U (en) Liquefied natural gas cold energy recycling system
CN114893718B (en) Liquid hydrogen and LNG (liquefied Natural gas) combined station building system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant