CN116518292B - Skid-mounted oxygen supply system - Google Patents

Skid-mounted oxygen supply system Download PDF

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Publication number
CN116518292B
CN116518292B CN202310143877.5A CN202310143877A CN116518292B CN 116518292 B CN116518292 B CN 116518292B CN 202310143877 A CN202310143877 A CN 202310143877A CN 116518292 B CN116518292 B CN 116518292B
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China
Prior art keywords
oxygen
pressure
liquid oxygen
liquid
vacuum tank
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CN202310143877.5A
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CN116518292A (en
Inventor
鲍君香
黎佳荣
杨文元
陈志诚
余鹏飞
刘奔
黄世飞
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Hangzhou Zhongtai Hydrogen Energy Technology Co ltd
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Hangzhou Zhongtai Hydrogen Energy Technology Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
    • 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
    • F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height 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
    • F17C13/025—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
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • 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
    • 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
    • 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
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed 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
    • F17C2221/011—Oxygen
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2227/0192—Propulsion of the fluid by using a working fluid
    • 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
    • F17C2227/0323—Heat exchange with the fluid by heating using another fluid in a closed loop
    • 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
    • F17C2227/0393—Localisation of heat exchange separate using a vaporiser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion
    • 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
    • F17C2260/05—Improving chemical properties
    • F17C2260/053—Reducing corrosion
    • 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
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a skid-mounted oxygen supply system, which comprises a liquid oxygen source, a liquid oxygen vacuum tank, a quick vaporizer, a gas supply pressure regulating module, a nitrogen purging system and an oxygen flow control analysis module, wherein the liquid oxygen source is connected with the quick vaporizer through the liquid oxygen vacuum tank; the liquid oxygen source is connected with the liquid oxygen vacuum tank through a first regulating valve; the liquid oxygen vacuum tank is connected with the quick vaporizer through a second regulating valve; the oxygen supply port of the rapid vaporizer is also sequentially connected with an air supply pressure adjusting module and an oxygen flow control analysis module; the nitrogen purging system is arranged on the branch of the connecting pipeline of the air supply pressure adjusting module and the oxygen flow control analysis module. The oxygen supply system adopts the full skid-mounted module and the oxygen supply technology, so that the space applicability is enlarged, the potential safety hazard is reduced to the greatest extent, the reliability of the system is improved, and meanwhile, the remote operation and control are realized; the invention adopts the high-reliability loop to control the risk of cold friability, realizes stable interlocking protection, solves the problems of space limitation and possible risk of fire and explosion caused by oxygen accumulation, and ensures the use safety.

Description

Skid-mounted oxygen supply system
Technical Field
The invention relates to the field of intensive and safe upgrading of oxygen supply systems, in particular to a skid-mounted oxygen supply system.
Background
In the field of industrial oxygen supply, a large-scale air separation device and pipeline gas are matched with most of lower-end oxygen devices, but for the fields of copper smelting, aluminum smelting, glass, water treatment, flue gas treatment and the like, the air-to-oxygen transformation is carried out on the original device due to the fact that the required flow of oxygen is small and the fields are in green carbon reduction, energy conservation and emission reduction generally, and the space is very limited.
Oxygen is combustion-supporting gas, oxygen pipelines are required to be prevented from being exposed to sunlight or being arranged in a high-temperature environment, liquid oxygen is in a liquid state of oxygen, and oxygen accumulation caused by gas oxygen or liquid oxygen emission can generate fire and explosion risks.
Therefore, a safe, effective, compact oxygen supply system is the first choice in this field.
Disclosure of Invention
The invention aims to provide a skid-mounted oxygen supply system which adopts a full skid-mounted module and an oxygen supply technology, so that the space applicability is enlarged, the potential safety hazard is reduced to the greatest extent, the reliability of the system is improved, the remote operation and control are realized, the risks of fire and explosion caused by space limitation and oxygen accumulation are solved, and the use safety is ensured.
The technical aim of the invention is realized by the following technical scheme: the skid-mounted oxygen supply system comprises a liquid oxygen source, a liquid oxygen vacuum tank connected with the liquid oxygen source, a rapid vaporizer for vaporizing the liquid oxygen, a gas supply pressure adjusting module, a nitrogen purging system and an oxygen flow control analysis module, wherein a first adjusting valve is arranged between the liquid oxygen source and the liquid oxygen vacuum tank, a liquid level meter is arranged on the liquid oxygen vacuum tank, and when the liquid level is higher than a set value, the first adjusting valve is automatically closed to stop oxygen supply to the liquid oxygen source; when the liquid level is lower than the set value, the liquid level meter gives out an oxygenation alarm; a second regulating valve is arranged between the liquid oxygen vacuum tank and the quick vaporizer; a safety pressure increasing and reducing module is further arranged between the liquid oxygen vacuum tank and the quick vaporizer, and comprises a pressure transmitter for detecting the pressure of the liquid oxygen vacuum tank, a pressure relief valve arranged on the liquid oxygen vacuum tank and a liquid oxygen gasification pipeline forming a loop between the liquid oxygen vacuum tank and the quick vaporizer; a booster valve is arranged on the liquid oxygen gasification pipeline; the pressure transmitter controls the opening of the pressure release valve, so as to control and adjust the pressure of the liquid oxygen vacuum tank, and adjust the pressure in the liquid oxygen vacuum tank; the pressurizing valve adjusts the opening degree through the pressure transmitter, so that partial liquid oxygen is quickly vaporized, the liquid oxygen vacuum tank is quickly pressurized, and the safety oxygen supply of unpowered equipment is realized when the oxygen consumption requirement at the downstream of the oxygen supply system is increased in a short period; the rapid vaporizer, the air supply pressure adjusting module and the oxygen flow control analysis module are sequentially connected, and the air supply pressure adjusting module is used for adjusting the oxygen pressure; the oxygen flow control analysis module is used for adjusting the oxygen flow; the nitrogen purging system for heating, purging and replacing the skid-mounted oxygen supply system before oxygen supply of the skid-mounted oxygen supply system is arranged on the branch of the connecting pipeline of the air supply pressure adjusting module and the oxygen flow control analysis module.
As a preferable scheme of the invention, the quick vaporizer is connected with a low-pressure steam system through a temperature regulating valve, the quick vaporizer is provided with a temperature transmitter capable of detecting the temperature of water bath in the vaporizer, the temperature transmitter TIC is associated with a temperature regulating valve TV005, and the air supply temperature is 0-20 ℃.
As a preferable scheme of the invention, the air supply pressure regulating module consists of a controller and a pressure automatic regulating valve for ensuring the air supply pressure to be stable, and the air supply compressed air is 0.15-0.5KPag.
As a preferable scheme of the invention, the nitrogen purging system is connected to a pipeline between the air supply pressure regulating module and the oxygen flow control analysis module through a third regulating valve, and the design pressure of the nitrogen purging system is 0.4-0.8MPag.
As a preferable scheme of the invention, the oxygen flow control analysis module comprises a controller and a flow regulating valve FV007, and the air supply flow is 100-5000Nm 3/h.
As a preferable scheme of the invention, a safety control interlocking system formed by the safety pressure increasing and reducing module of the oxygen supply system and the other modules is used for guaranteeing normal work of steam, instrument gas, electricity and the like of the oxygen supply system and preventing control valve failure, liquid level failure and check valve failure.
As a preferable scheme of the invention, the first regulating valve HV001 has an emergency cutting function, and when the instrument detects that the ambient oxygen exceeds the standard, the first regulating valve HV001 with the functions of accident self-locking and manual resetting automatically and quickly closes a liquid oxygen source to prevent accidents.
The invention also provides a working method of the skid-mounted oxygen supply system, which comprises the following steps:
1) Firstly, a nitrogen purging system is opened, nitrogen is adopted to heat, purge and replace the system, the air inlet pressure of the nitrogen purging system is continuously regulated through a third regulating valve according to the cleanliness of a system pipeline, and after purging is finished, the third regulating valve HV006 is closed, so that the cleanliness and safety of liquid oxygen gasification of the oxygen supply system are ensured;
2) After purging, opening a first regulating valve, and providing liquid oxygen to a liquid oxygen vacuum tank by a liquid oxygen source through the first regulating valve; the first regulating valve is used for regulating the opening degree according to the liquid level in the liquid oxygen vacuum tank fed back by the liquid level meter, so that the flow speed of liquid oxygen and the liquid level of the liquid oxygen vacuum tank are controlled within a certain range;
3) The liquid oxygen vacuum tank supplies liquid oxygen to the rapid vaporizer through a second regulating valve; when the pressure in the liquid oxygen vacuum tank is insufficient, gasifying the liquid oxygen in the liquid oxygen vacuum tank through the pressure boosting valve and returning the gasified liquid oxygen to the liquid oxygen vacuum tank again for rapid pressure boosting through the rapid carburetor so as to assist the second regulating valve to accelerate the supply of the liquid oxygen to the rapid carburetor;
4) The temperature regulating valve connected with the low-pressure steam system and the quick vaporizer is used for detecting the water bath temperature of the quick vaporizer so as to regulate the opening degree, so that the low-pressure steam system is enabled to be filled with a proper amount of steam to realize the gasification of oxygen in a short time;
5) The liquid oxygen enters a gas supply pressure regulating module after being gasified by the rapid carburetor, and the gas supply pressure regulating module regulates the pressure of oxygen from upstream through a pressure automatic regulating valve, so that the gas supply pressure range is ensured to be 0.15-0.5MPag;
6) The oxygen regulated by the air supply pressure regulating module enters the oxygen flow control analysis module again, and the flow regulating valve is used for regulating the flow of the oxygen and leading out the skid-mounted oxygen supply system so as to meet the requirements.
In summary, the invention has the following beneficial effects:
The space applicability is enlarged by adopting the full skid-mounted module; by adopting the passive equipment design technology, not only can the noise caused by mechanical operation be avoided, but also the potential safety hazard is reduced to the greatest extent and the reliability of the system is improved;
the invention reduces the cold-friability risk of the oxygen supply system by designing the high-reliability protection loop;
the invention adopts a stable interlocking protection control technology to design a protection control system, thereby realizing remote operation and control of the oxygen supply system.
Drawings
FIG. 1 is a schematic view of a skid-mounted oxygen supply system according to a first embodiment;
reference numerals: v01, a liquid oxygen vacuum tank; v02, a fast vaporizer; HV001, first regulator valve; HV002, second regulator valve; PV003, booster valve; PV002, relief valve; TV005, temperature regulating valve; PV005, pressure automatic regulating valve; HV006, third regulator valve; HV007, flow regulating valve.
Detailed Description
The invention is further illustrated and described below in connection with specific embodiments. The described embodiments are merely exemplary of the present disclosure and do not limit the scope. The technical features of the embodiments of the invention can be combined correspondingly on the premise of no mutual conflict.
As shown in fig. 1, the skid-mounted oxygen supply system comprises a liquid oxygen source, a liquid oxygen vacuum tank V01 connected with the liquid oxygen source through a first regulating valve HV001, a fast vaporizer V02 connected with the liquid oxygen vacuum tank V01 through a second regulating valve HV002, a gas supply pressure regulating module for regulating the output oxygen pressure in the fast vaporizer V02, an oxygen flow control analysis module for regulating the oxygen flow and a nitrogen purging system arranged on the branch of the connecting pipeline of the gas supply pressure regulating module and the oxygen flow control analysis module;
the liquid oxygen source is connected with the liquid oxygen vacuum tank V01 through a first regulating valve HV001, a liquid level meter is arranged on the liquid oxygen vacuum tank V01, when the liquid level is higher than a set value, the first regulating valve HV001 can be automatically closed to stop the oxygen supply of the liquid oxygen source, so that safety accidents caused by overhigh liquid level are prevented, and when the liquid level is lower than the set value, an alarm can be sent to remind an operator to supplement the liquid oxygen;
The liquid oxygen vacuum tank V01 is connected with the rapid vaporizer V02 through a second regulating valve HV002, the opening degree of the second regulating valve HV002 is regulated through signals of a flow device and a pressure sensing device at an outlet of the liquid oxygen vacuum tank V01, and when the oxygen demand of a downstream device is improved, the opening degree of the second regulating valve HV002 is increased, so that more liquid oxygen is provided for the rapid vaporizer V02 for rapid vaporization. A safety pressure increasing and reducing module is further arranged between the liquid oxygen vacuum tank V01 and the quick vaporizer V02, and a safety control interlocking system formed by the safety pressure increasing and reducing module and other modules can ensure normal work of steam, instrument gas, electricity and the like of the oxygen supply system, control valve failure, liquid level failure, check valve failure and the like. The safety pressure increasing and reducing module comprises a pressure transmitter for detecting the pressure of the liquid oxygen vacuum tank V01, a pressure relief valve PV002 arranged on the liquid oxygen vacuum tank V01 and a liquid oxygen gasification pipeline forming a loop between the liquid oxygen vacuum tank V01 and the quick vaporizer V02; a pressurizing valve PV003 is arranged on the liquid oxygen gasification pipeline; the pressure transmitter controls the opening of the pressure release valve PV002, so as to control and regulate the pressure of the liquid oxygen vacuum tank V01, and realize the regulation of the pressure in the liquid oxygen vacuum tank V01; the opening of the booster valve PV003 is adjusted through the pressure transmitter, so that partial liquid oxygen is quickly vaporized, the liquid oxygen vacuum tank V01 is quickly pressurized, and the safety oxygen supply of unpowered equipment is realized when the oxygen demand of the downstream of the oxygen supply system is increased in a short period; the pressure boosting valve PV003 and the pressure relief valve PV002 are linked, when the pressure of the liquid oxygen vacuum tank V01 provided with the pressure transmitter is higher than a set value, the opening of the pressure relief valve PV002 can be automatically adjusted, so that the pressure of the liquid oxygen vacuum tank V01 is reduced to reach a normal operation value; when the pressure of the liquid oxygen vacuum tank V01 is lower than a set value, the opening of the booster valve PV003 can be automatically adjusted, so that the liquid oxygen in the liquid oxygen vacuum tank V01 enters the quick vaporizer V02, and the liquid oxygen is quickly gasified back into the liquid oxygen vacuum tank V01 under the heating of the pneumatic steam system or hot water, so that the pressure of the liquid oxygen vacuum tank V01 rises to reach a normal operation value. The oxygen supply port of the quick vaporizer V02 is also sequentially connected with an air supply pressure adjusting module and an oxygen flow control analysis module, and the nitrogen purging system is used for heating, purging and replacing the system before oxygen supply of the skid-mounted oxygen supply system.
In a specific embodiment of the invention, the quick vaporizer V02 is connected with a low-pressure steam system through a temperature regulating valve TV005, the quick vaporizer V02 is provided with a temperature transmitter TIC capable of detecting the temperature of water bath in the vaporizer, the temperature transmitter TIC is associated with the temperature regulating valve TV005, the air supply temperature is 0-20 ℃, and the steam inlet can be controlled through the opening degree of the temperature regulating valve TV005 of the water bath, so that the water bath temperature is stable. Besides adopting a low-pressure steam system as a heat source, the rapid vaporizer V02 can also adopt hot water as a heat source to heat liquid oxygen, and a liquid oxygen pipeline is immersed in water with saturated temperature, so that the hot water and the liquid oxygen can fully exchange heat and fully gasify, and the condensed water of the rapid vaporizer V02 is led to the boundaries of the prying blocks for unified collection and discharge.
In one embodiment of the invention, the air supply pressure regulating module consists of a controller and a pressure automatic regulating valve PV005 for ensuring the air supply pressure to be stable, and the air supply compressed air is 0.15-0.5KPag. The nitrogen purging system is connected to a pipeline between the air supply pressure adjusting module and the oxygen flow control analysis module through a third adjusting valve HV006, and the design pressure of the nitrogen purging system is 0.4-0.8MPag. The oxygen flow control analysis module consists of a controller and a flow regulating valve HV007, and the air supply flow is 100-5000Nm3/h.
The rapid vaporizer V02 adopts low-pressure steam or hot water as a heat source to heat liquid oxygen, and a liquid oxygen pipeline is immersed in water with saturated temperature, so that the hot water and the liquid oxygen exchange heat fully and are gasified fully; the condensed water of the quick vaporizer V02 is led to the boundary of the prying block for uniform collection and discharge; a small amount of low-temperature liquid in the skid block is gasified and led to the top of the skid block together with oxygen at the top of the liquid oxygen vacuum tank V01 to be discharged to the atmosphere; the oxygen supply system is provided with a dry oil-free nitrogen purging system with the pressure of 4-0.8MPag, and nitrogen can be adopted to heat, purge and replace the system before the system is started and when the system is stopped and restarted; the skid-mounted oxygen supply system has no moving equipment, so that potential safety hazards are reduced to the greatest extent, and the reliability of the system is improved. The skid-mounted oxygen supply system adopts PLC control or DCS control, and a controller collects operation key parameters such as liquid level, flow, pressure and the like, automatically maintains historical data and curves, and is used for operation and production analysis. The low-temperature pipeline adopts a heat insulation material to perform pipeline heat insulation, and the high-temperature pipeline adopts a heat insulation material to perform heat insulation and scalding prevention.
In order to more clearly express the working process of the skid-mounted oxygen supply system, the embodiment also provides a working method of the skid-mounted oxygen supply system, which comprises the following steps:
1) Firstly, a nitrogen purging system is opened, nitrogen is adopted to heat, purge and replace the system, the air inlet pressure of the nitrogen purging system is continuously regulated through a third regulating valve HV006 according to the cleanliness of a system pipeline, and after purging is finished, the third regulating valve HV006 is closed, so that the cleanliness and safety of liquid oxygen gasification of the oxygen supply system are ensured;
2) After purging, opening a first regulating valve HV001, and providing liquid oxygen to a liquid oxygen vacuum tank V01 by a liquid oxygen source through the first regulating valve HV 001; the opening of the first regulating valve HV001 is regulated according to the liquid level in the liquid oxygen vacuum tank V01 fed back by the liquid level meter, so that the flow speed of liquid oxygen and the liquid level of the liquid oxygen vacuum tank V01 are controlled within a certain range;
3) The liquid oxygen vacuum tank V01 supplies liquid oxygen to the rapid vaporizer V02 through the second regulating valve HV 002; when the pressure in the liquid oxygen vacuum tank V01 is insufficient, the liquid oxygen in the liquid oxygen vacuum tank V01 is gasified by the pressure boosting valve PV003 and then returned to the liquid oxygen vacuum tank V01 for rapid pressure boosting through the rapid carburetor V02, so that the second power-assisted regulating valve HV002 can supply the liquid oxygen to the rapid carburetor V02 in an accelerated manner;
4) The temperature regulating valve TV005 connected with the low-pressure steam system and the rapid vaporizer V02 regulates the opening degree by detecting the water bath temperature of the rapid vaporizer V02, so that the low-pressure steam system is enabled to be filled with a proper amount of steam to realize the gasification of oxygen in a short time;
5) The liquid oxygen enters a gas supply pressure regulating module after being gasified by a rapid carburetor V02, and the gas supply pressure regulating module regulates the pressure of oxygen from upstream through a pressure automatic regulating valve PV005, so that the gas supply pressure range is ensured to be 0.15-0.5MPag;
6) The oxygen regulated by the air supply pressure regulating module enters the oxygen flow control analysis module again, and the flow regulating valve FV007 is used for regulating the flow of the oxygen and leading out the skid-mounted oxygen supply system so as to meet the requirements.
The skid-mounted oxygen supply system is used for combustion reformation of a kiln, an inlet pipeline of the skid-mounted oxygen supply system is connected with a liquid oxygen tank car, an outlet of the skid-mounted oxygen supply system is connected with an oxygen-enriched combustion system matched with the kiln, and oxygen with certain requirements is provided for a smelting plant through pressure and flow regulating valves arranged in the system. Wherein, the flow rate of the skid-mounted oxygen supply system is 1100Nm3/h under the design standard condition, the pressure is 2.5MPa, and the adjusting range is 30-110%. Under the condition that the furnace temperature and the yield of the kiln are basically unchanged, 10-25% of natural gas can be saved, 20-40% of CO emission reduction and 23-54% of NOx emission reduction can be realized.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.

Claims (5)

1. An oxygen supply method of a skid-mounted oxygen supply system is characterized by comprising the following steps of: the skid-mounted oxygen supply system comprises a liquid oxygen source, a liquid oxygen vacuum tank (V01) connected with the liquid oxygen source, a quick vaporizer (V02) for vaporizing the liquid oxygen, a gas supply pressure adjusting module, a nitrogen purging system and an oxygen flow control analysis module, wherein a first adjusting valve (HV 001) is arranged between the liquid oxygen source and the liquid oxygen vacuum tank (V01), a liquid level meter is arranged on the liquid oxygen vacuum tank (V01), and when the liquid level is higher than a set value, the first adjusting valve (HV 001) is automatically closed to stop oxygen supply of the liquid oxygen source; when the liquid level is lower than the set value, the liquid level meter gives out an oxygenation alarm; a second regulating valve (HV 002) is arranged between the liquid oxygen vacuum tank (V01) and the quick carburetor (V02); a safety pressure increasing and reducing module is further arranged between the liquid oxygen vacuum tank (V01) and the quick vaporizer (V02), and comprises a pressure transmitter for detecting the pressure of the liquid oxygen vacuum tank (V01), a pressure relief valve (PV 002) arranged on the liquid oxygen vacuum tank (V01) and a liquid oxygen gasification pipeline for forming a loop between the liquid oxygen vacuum tank (V01) and the quick vaporizer (V02); a pressurizing valve (PV 003) is arranged on the liquid oxygen gasification pipeline; the pressure transmitter controls the opening of the pressure relief valve (PV 002), so as to control and regulate the pressure of the liquid oxygen vacuum tank (V01), and realize the regulation of the pressure in the liquid oxygen vacuum tank (V01); the opening of the pressure boosting valve (PV 003) is adjusted through the pressure transmitter, so that partial liquid oxygen is quickly vaporized, the liquid oxygen vacuum tank (V01) is quickly boosted, and the safety oxygen supply of unpowered equipment is realized when the oxygen demand of the downstream of the oxygen supply system is increased in a short period; the rapid vaporizer (V02) is connected with a low-pressure steam system through a temperature regulating valve (TV 005), the rapid vaporizer (V02) is provided with a temperature transmitter TIC capable of detecting the temperature of water bath in the vaporizer, the temperature transmitter TIC is associated with the temperature regulating valve (TV 005), and the air supply temperature is 0-20 ℃; the rapid vaporizer (V02), the air supply pressure adjusting module and the oxygen flow control analysis module are connected in sequence, and the air supply pressure adjusting module is used for adjusting the oxygen pressure; the oxygen flow control analysis module is used for adjusting the oxygen flow; the nitrogen purging system for heating, purging and replacing the skid-mounted oxygen supply system before oxygen supply of the skid-mounted oxygen supply system is arranged on the branch of the connecting pipeline of the air supply pressure adjusting module and the oxygen flow control analysis module;
the oxygen supply method of the skid-mounted oxygen supply system comprises the following steps:
1) Firstly, a nitrogen purging system is opened, nitrogen is adopted to heat, purge and replace the system, the air inlet pressure of the nitrogen purging system is continuously regulated through a third regulating valve (HV 006) according to the cleanliness of a system pipeline, and after purging is finished, the third regulating valve (HV 006) is closed, so that the cleanliness and the safety of liquid oxygen gasification of the oxygen supply system are ensured;
2) After purging, opening a first regulating valve (HV 001), and providing liquid oxygen to a liquid oxygen vacuum tank (V01) by a liquid oxygen source through the first regulating valve (HV 001); the first regulating valve (HV 001) is used for regulating the opening degree according to the liquid level in the liquid oxygen vacuum tank (V01) fed back by the liquid level meter, so that the flow speed of liquid oxygen and the liquid level of the liquid oxygen vacuum tank (V01) are controlled within a range;
3) The liquid oxygen vacuum tank (V01) supplies liquid oxygen to the rapid vaporizer (V02) through a second regulating valve (HV 002); when the pressure in the liquid oxygen vacuum tank (V01) is insufficient, gasifying the liquid oxygen in the liquid oxygen vacuum tank (V01) through a pressure boosting valve (PV 003) by using a quick carburetor (V02) and then returning the gasified liquid oxygen to the liquid oxygen vacuum tank (V01) for quick boosting so as to assist a second regulating valve (HV 002) to accelerate the supply of the liquid oxygen to the quick carburetor (V02);
4) A temperature regulating valve (TV 005) connected with the low-pressure steam system and the rapid vaporizer (V02) is used for detecting the water bath temperature of the rapid vaporizer (V02) so as to regulate the opening degree, so that the low-pressure steam system is enabled to be filled with a proper amount of steam to realize the gasification of oxygen in a short time;
5) The liquid oxygen enters a gas supply pressure regulating module after being gasified by a rapid carburetor (V02), and the gas supply pressure regulating module regulates the pressure of oxygen from upstream through a pressure automatic regulating valve (PV 005) to ensure that the gas supply pressure range is 0.15-0.5MPag;
6) The oxygen regulated by the air supply pressure regulating module enters the oxygen flow control analysis module again, and the oxygen flow is regulated by the flow regulating valve (FV 007) and led out of the skid-mounted oxygen supply system to meet the requirements.
2. The oxygen supply method according to claim 1, wherein: the air supply pressure regulating module consists of a controller and a pressure automatic regulating valve (PV 005) for ensuring the air supply pressure to be stable, and the air supply compressed air is 0.15-0.5KPag.
3. The oxygen supply method according to claim 1, wherein: the nitrogen purging system is connected to a pipeline between the air supply pressure adjusting module and the oxygen flow control analysis module through a third adjusting valve (HV 006), and the design pressure of the nitrogen purging system is 0.4-0.8MPag.
4. The oxygen supply method according to claim 1, wherein: the oxygen flow control analysis module comprises a controller and a flow regulating valve (FV 007), and the air supply flow is 100-5000Nm 3/h.
5. The oxygen supply method according to claim 1, wherein: the safety control interlocking system formed by the safety pressure increasing and reducing module and other modules of the oxygen supply system is used for guaranteeing the normal operation of steam, instrument gas and electricity of the oxygen supply system and preventing control valve failure, liquid level failure and check valve failure.
CN202310143877.5A 2023-02-21 2023-02-21 Skid-mounted oxygen supply system Active CN116518292B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201526804U (en) * 2009-11-17 2010-07-14 向卫 Liquid oxygen gasification device specially used for oxygen-richened micro-oil ignition and combustion stabilization device
CN204420567U (en) * 2014-12-30 2015-06-24 新能能源有限公司 Gasification system oxygen pipeline purges and uses high pressure nitrogen system
CN108591823A (en) * 2018-05-07 2018-09-28 西安交通大学 A kind of online oxygen system and control method of continuous-stable
CN111750266A (en) * 2020-07-29 2020-10-09 西安医学院第二附属医院 Oxygen supply system adopting liquid oxygen tank and control method
CN114198639A (en) * 2021-11-26 2022-03-18 南通恒信达冷冻设备有限公司 Automatic invariable system of ultra-low temperature liquid basin pressure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201526804U (en) * 2009-11-17 2010-07-14 向卫 Liquid oxygen gasification device specially used for oxygen-richened micro-oil ignition and combustion stabilization device
CN204420567U (en) * 2014-12-30 2015-06-24 新能能源有限公司 Gasification system oxygen pipeline purges and uses high pressure nitrogen system
CN108591823A (en) * 2018-05-07 2018-09-28 西安交通大学 A kind of online oxygen system and control method of continuous-stable
CN111750266A (en) * 2020-07-29 2020-10-09 西安医学院第二附属医院 Oxygen supply system adopting liquid oxygen tank and control method
CN114198639A (en) * 2021-11-26 2022-03-18 南通恒信达冷冻设备有限公司 Automatic invariable system of ultra-low temperature liquid basin pressure

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