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CN114017674A - Static natural gas hydrogen-mixing mechanism and working method thereof - Google Patents

Static natural gas hydrogen-mixing mechanism and working method thereof Download PDF

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Publication number
CN114017674A
CN114017674A CN202111278850.4A CN202111278850A CN114017674A CN 114017674 A CN114017674 A CN 114017674A CN 202111278850 A CN202111278850 A CN 202111278850A CN 114017674 A CN114017674 A CN 114017674A
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CN
China
Prior art keywords
gas
valve
follow
mixed gas
pipe
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Withdrawn
Application number
CN202111278850.4A
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Chinese (zh)
Inventor
李永胜
刘玉鹏
荀浩亮
王长伟
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Tianjin Olida Environmental Protection Equipment Co ltd
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Tianjin Olida Environmental Protection Equipment Co ltd
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Priority to CN202111278850.4A priority Critical patent/CN114017674A/en
Publication of CN114017674A publication Critical patent/CN114017674A/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
    • 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
    • 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
    • F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
    • 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
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00—Protection or supervision of installations
    • F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
    • 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
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2223/0107—Single phase
    • F17C2223/0123—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
    • 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
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/046—Methods for emptying or filling by even emptying or filling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0447—Composition; Humidity
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/02—Mixing fluids
    • F17C2265/025—Mixing fluids different fluids
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/34—Hydrogen distribution
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Accessories For Mixers (AREA)

Abstract

The invention aims to provide a static natural gas hydrogen-mixing mechanism and a working method thereof, which are characterized in that: the device comprises a base, a static mixer, a driving gas input pipe, a driving gas input valve, a driving gas flowmeter, a follow-up gas input pipe, a follow-up gas input valve, a follow-up gas flowmeter, a mixed gas output pipe, a methane analyzer, a mixed gas flowmeter, a filtering device, a check valve, a heat value instrument, a mixed gas output valve, a blow-down valve and a control cabinet; the whole mixed gas thinking design that adopts variable proportion, variable flow for two kinds of gases of hydrogen and natural gas get into the blender according to certain proportion, come to carry out automatically regulated to the aperture of hydrogen flow control valve port through methane analysis appearance and the flowmeter of gas mixing export, the mixed gas that the output meets the requirements, cooperation intelligent control mechanism realizes keeping watch on flow, pressure parameter, carry out automatic control to methane concentration and gas mixing calorific value, promote the controllability of gas mixing, the supervision precision is high, the reaction is sensitive, the operation is more safe and stable.

Description

Static natural gas hydrogen-mixing mechanism and working method thereof
Technical Field
The invention relates to the field of energy environmental protection, in particular to a static natural gas hydrogen-mixing mechanism and a working method thereof.
Background
With the decreasing of fossil fuels, renewable energy sources have become hot research due to their characteristics of being clean, environment-friendly and sustainable. Renewable energy sources such as solar energy, wind energy, hydropower and the like are unstable in production, and cannot be consumed and discarded when the resources are rich and the terminal consumes low ebb; the natural gas-hydrogen blended fuel is a substitute gas fuel obtained by mixing hydrogen and natural gas according to a certain proportion, belongs to one of 'light hydrogen fuels', and is also an environment-friendly fuel from the fuel characteristic; although some existing natural gas blending equipment can complete blending of natural gas and hydrogen according to a specific proportion, the existing natural gas blending equipment is single in functionality, and lacks of automatic guarantee in flow allocation, so that uncertainty exists in the blending proportion of the natural gas and the hydrogen, control over the blending proportion of the natural gas is lost, monitoring of gas pressure parameters is lacked, and stability and safety of natural gas blending cannot be guaranteed; in summary, a complete natural gas hydrogen-loading mechanism and method need to be developed to solve the problems and disadvantages encountered in the actual work, so that the operation risk is reduced, and the automatic management and control of the mixing of the natural gas and the hydrogen gas are realized.
Disclosure of Invention
The invention aims to provide a static natural gas hydrogen mixing mechanism which adopts a variable-proportion and variable-flow gas mixing thought design, enables hydrogen and natural gas to enter a mixer according to a certain proportion, automatically adjusts the opening degree of a valve port of a hydrogen flow regulating valve through a methane analyzer and a flowmeter at a gas mixing outlet, adjusts the mixing proportion of the two gases, outputs mixed gas meeting requirements, can realize monitoring on flow and pressure parameters by matching with an intelligent control mechanism, and automatically controls the methane concentration and the heat value of the mixed gas.
The technical scheme of the invention is as follows: a static natural gas hydrogen-loading mixing mechanism is characterized in that: the device comprises a base, a static mixer, an active gas input pipe, an active gas input valve, an active gas flowmeter, a follow-up gas input pipe, a follow-up gas input valve, a follow-up gas flowmeter, a mixed gas output pipe, a methane analyzer, a mixed gas flowmeter, a filtering device, a check valve, a heat value instrument, a mixed gas output valve, a blow-down valve and a control cabinet, wherein the static mixer is positioned at the upper part of the base, the static mixer is fixedly connected with the base, the active gas input pipe is positioned at one side of the static mixer, the active gas input pipe is fixedly connected with the static mixer, the active gas input valve and the active gas flowmeter are both positioned at the middle part of the active gas input pipe, the active gas input valve is positioned at a position close to the connecting end of the active gas input pipe and the static mixer, and the active gas flowmeter and the active gas input pipe are both fixedly connected with the active gas input pipe, the follow-up gas input pipe is positioned at one side of the main gas input pipe, the follow-up gas input pipe is fixedly connected with the static mixer, the follow-up gas input valve and the follow-up gas flow meter are all positioned in the middle of the follow-up gas input pipe, the follow-up gas input valve is positioned at a position close to the connecting end of the follow-up gas input pipe and the static mixer, the follow-up gas input valve and the follow-up gas flow meter are both fixedly connected with the follow-up gas input pipe, the mixed gas output pipe is positioned at the other side of the static mixer, the mixed gas output pipe is fixedly connected with the static mixer, the methane analyzer, the mixed gas flowmeter, the filtering device, the check valve, the heat value meter and the mixed gas output valve are all positioned in the middle of the mixed gas output pipe, the methane analyzer is positioned at a position close to the connecting end of the mixed gas output pipe and the static mixer, and the methane analyzer is fixedly connected with the mixed gas output pipe, the methane analyzer is connected with the follow-up gas input valve and the control cabinet by a circuit, the mixed gas flowmeter is positioned on one side of the methane analyzer, the mixed gas flowmeter is fixedly connected with the methane analyzer, the filtering device is positioned at the next stage of the methane analyzer, the filtering device is fixedly connected with the mixed gas output pipe, the check valve is positioned at the next stage of the filtering device, the check valve is fixedly connected with the mixed gas output pipe, the heat value meter is positioned at the next stage of the check valve, the heat value meter is fixedly connected with the mixed gas output pipe, the mixed gas output valve is positioned at the next stage of the heat value meter, the mixed gas output valve is fixedly connected with the mixed gas output pipe, the mixed gas output valve is connected with the control cabinet by a circuit, the blow-down valve is positioned at the lower part of the static mixer, and the blow-down valve is fixedly connected with the static mixer, the control cabinet is located the upper portion of base, the control cabinet is fixed connection with the base, still be equipped with the intelligent control appearance on the control cabinet, the intelligent control appearance is located one side of control cabinet, the intelligent control appearance is fixed connection with the control cabinet.
Further, the base is of a skid-mounted structure.
Further, the static mixer is a baffle plate type gas mixer with a square pipe network.
Furthermore, the active gas input valve, the mixed gas output valve and the blow-off valve are all screwed manual ball valves.
Furthermore, the follow-up pneumatic input valve is a manual-automatic integrated type electric control airflow valve.
Further, the filtering device is a Y-shaped filter.
The working method comprises the following steps:
step one, operation preparation: firstly, checking the inlet pressure of an active air input pipe and the inlet pressure of a follow-up air input pipe, and ensuring that the pressure meets the requirement of air mixing, wherein when the pressure of the active air input pipe and the pressure of the follow-up air input pipe can not meet the requirement of air mixing, the whole set of air mixing system equipment does not have a starting condition; then, confirming that a gas mixing pry interlocking switch on the control cabinet is in a cutting-off position; then, confirming that the active gas input valve, the follow-up gas input valve, the mixed gas output valve and the blow-down valve are in the 'closed' positions, wherein the active gas input valve, the follow-up gas input valve, the mixed gas output valve and the blow-down valve are used for ensuring the pipeline closure of the natural gas before blending the hydrogen gas, so that in the subsequent use, a worker can more accurately capture monitoring data and improve the operation safety, and other valves are all in the 'open' positions; in addition, before the initial start, the pipe network must be replaced by nitrogen;
step two, inflating and injecting: the working personnel firstly close the main power switch of the upper-level switch cabinet to supply power to the control cabinet; then, confirming that the display of each instrument on the control cabinet is normal; then, slowly opening an inlet valve on the main pipeline, allowing natural gas to enter from the active gas input pipe, and allowing hydrogen to enter from the follow-up gas input pipe, and observing the pressure value of the active gas flowmeter on the active gas input pipe and the pressure value of the follow-up gas flowmeter on the follow-up gas input pipe by a worker, so that the pressure values of the natural gas and the hydrogen respectively reach the gas mixing requirement; then, opening an active gas input valve to enable natural gas to enter a static mixer, and simultaneously, slowly opening a follow-up gas input valve in a manual operation state of a control cabinet system to enable hydrogen to enter the static mixer to start gas mixing, wherein at the moment, two flow meters, namely an active gas flow meter and a follow-up gas flow meter, respectively indicate the flow rates of the natural gas and the hydrogen;
step three, mixing reaction: the natural gas and the hydrogen enter the static mixer for mixing, the static mixer adopts a baffle plate type gas mixer with a square pipe network and has the characteristic of strong corrosion resistance, baffle plate mixing unit bodies in the static mixer flow into a rear pipe network after being uniform, the natural gas and the hydrogen can be thoroughly mixed, and in the process of mixing operation, the flow pressure of mixing the two gases can be ensured, so that the mixing process is more stable;
step four, mixed gas output: the mixed gas of the natural gas and the hydrogen mixed by the static mixer is conveyed out along a mixed gas output pipe, firstly passes through a methane analyzer and is used for monitoring a methane coefficient to judge whether the mixed gas reaches a set value, and a mixed gas flowmeter is also arranged on one side of the methane analyzer; then, the mixed gas is continuously output through a filtering device, and the filtering device adopts a Y-shaped filter, so that impurities in the mixed gas can be filtered out, and the purifying and purifying effects are achieved; then, the filtered and purified mixed gas enters a heat value instrument through a check valve, the check valve can ensure the one-way delivery of the gas flow and avoid the influence caused by backflow, the heat value instrument is used for monitoring the heating value of the mixed gas before output, and if abnormal conditions exist, a worker can close the mixed gas output valve at the first time; in addition, an intelligent controller is arranged on the control cabinet, the intelligent controller can monitor flow and pressure parameters, automatically control methane concentration and mixed gas heat value, has high precision, sensitive response and stable operation, and can adjust the whole set of mixed gas system equipment to be put into automatic state operation through the intelligent controller when a worker observes that the mixed gas outlet gas parameters on the intelligent controller meet the requirements of users, and simultaneously, the mixed gas pry interlock switch on the control cabinet is switched from 'cut' to 'put' to ensure that the equipment enters a normal mixed gas state; the control cabinet has a parameter self-locking function so as to prevent other people from changing the set working condition at will;
step five, closing and stopping the operation: firstly, switching the whole set of system equipment from an automatic operation state to a manual operation state through a control cabinet; then, firstly closing the active gas input valve on the active gas input pipe to cut off the injection of the natural gas, and then immediately closing the follow-up gas input valve on the follow-up gas input pipe to cut off the injection of the hydrogen; then, closing the mixed gas output valve, and cutting off a corresponding selection switch on the control cabinet; then, all valves on the whole set of system equipment are closed; when the shutdown time is long, the residual gas in the static mixer and in each pipeline is discharged.
The invention has the beneficial effects that: this static natural gas mixing of hydrogen mixing mechanism adopts the proportion of becoming, the gas mixing thinking design of variable flow for two kinds of gases of hydrogen and natural gas get into the blender according to certain proportion, come to carry out automatically regulated to the aperture of hydrogen flow control valve port through methane analysis appearance and the flowmeter of gas mixing export, adjust the mixing proportion of two kinds of gases, the output meets the required mixed gas, and cooperate intelligent control mechanism can realize the flow, pressure parameter monitors, carry out automatic control to methane concentration and mixed gas calorific value, overall structure is compacter, simple to operate, convenient to maintain, the control nature of natural gas and hydrogen mixture has been promoted, the supervision precision is high, the reaction is sensitive, the operation is more safe and stable, be applicable to the blending of various gas such as liquefied petroleum gas, the natural gas, generator gas.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a medium conduction flow direction diagram of the present invention.
Wherein: 1. base 2, static mixer 3, initiative gas input pipe
4. An active air input valve 5, an active air flow meter 6 and a follow-up air input pipe
7. Follow-up air input valve 8, follow-up air flow meter 9 and mixed gas output pipe
10. Methane analyzer 11, mixed gas flowmeter 12, filter equipment
13. Check valve 14, heat value meter 15 and mixed gas output valve
16. Blowoff valve 17, control cabinet 18 and intelligent control instrument
Detailed Description
The following provides a brief description of embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 and 2, the static natural gas loading and mixing mechanism is characterized in that: the device consists of a base 1, a static mixer 2, a driving gas input pipe 3, a driving gas input valve 4, a driving gas flow meter 5, a follow-up gas input pipe 6, a follow-up gas input valve 7, a follow-up gas flow meter 8, a mixed gas output pipe 9, a methane analyzer 10, a mixed gas flow meter 11, a filtering device 12, a check valve 13, a heat value meter 14, a mixed gas output valve 15, a blow-off valve 16 and a control cabinet 17, wherein the static mixer 2 is positioned at the upper part of the base 1, the static mixer 2 is fixedly connected with the base 1, the driving gas input pipe 3 is positioned at one side of the static mixer 2, the driving gas input pipe 3 is fixedly connected with the static mixer 2, the driving gas input valve 4 and the driving gas flow meter 5 are all positioned at the middle part of the driving gas input pipe 3, and the driving gas input valve 4 is positioned at a position close to the connecting end of the driving gas input pipe 3 and the static mixer 2, the active gas input valve 4 and the active gas flowmeter 5 are fixedly connected with the active gas input pipe 3, the follow-up gas input pipe 6 is positioned on one side of the active gas input pipe 3, the follow-up gas input pipe 6 is fixedly connected with the static mixer 2, the follow-up gas input valve 7 and the follow-up gas flowmeter 8 are all positioned in the middle of the follow-up gas input pipe 6, the follow-up gas input valve 7 is positioned at a position close to the connecting end of the follow-up gas input pipe 6 and the static mixer 2, the follow-up gas input valve 7 and the follow-up gas flowmeter 8 are both fixedly connected with the follow-up gas input pipe 6, the mixed gas output pipe 9 is positioned on the other side of the static mixer 2, the mixed gas output pipe 9 is fixedly connected with the static mixer 2, the methane analyzer 10, the mixed gas flowmeter 11, the filtering device 12, the check valve 13, the calorific value instrument 14 and the mixed gas output valve 15 are all positioned in the middle of the mixed gas output pipe 9, the methane analyzer 10 is located at a position close to the connection end of the mixed gas output pipe 9 and the static mixer 2, the methane analyzer 10 is fixedly connected with the mixed gas output pipe 9, the methane analyzer 10 is connected with the follow-up gas input valve 7 and the control cabinet 17 by a circuit, the mixed gas flowmeter 11 is located at one side of the methane analyzer 10, the mixed gas flowmeter 11 is fixedly connected with the methane analyzer 10, the filter device 12 is located at the next stage of the methane analyzer 10, the filter device 12 is fixedly connected with the mixed gas output pipe 9, the check valve 13 is located at the next stage of the filter device 12, the check valve 13 is fixedly connected with the mixed gas output pipe 9, the heat value meter 14 is located at the next stage of the check valve 13, the heat value meter 14 is fixedly connected with the mixed gas output pipe 9, and the mixed gas output valve 15 is located at the next stage of the heat value meter 14, gas mixture output valve 15 is fixed connection with gas mixture output tube 9, and gas mixture output valve 15 utilizes the circuit and is connected with switch board 17, blowoff valve 16 is located the lower part of static mixer 2, blowoff valve 16 is fixed connection with static mixer 2, switch board 17 is located the upper portion of base 1, switch board 17 is fixed connection with base 1, still be equipped with intelligent control appearance 18 on the switch board 17, intelligent control appearance 18 is located one side of switch board 17, intelligent control appearance 18 is fixed connection with switch board 17. The base 1 is of a skid-mounted structure. The static mixer 2 is a baffle type gas mixer with a square pipe network. The active gas input valve 4, the mixed gas output valve 15 and the blow-off valve 16 are all screwed manual ball valves. The servo pneumatic input valve 7 is a manual-automatic integrated electric control airflow valve. The filter device 12 is a Y-filter.
The working mode is as follows: the static natural gas hydrogen-mixing mechanism is used for mixing hydrogen in a certain proportion into natural gas and further outputting mixed gas meeting requirements, the whole set of equipment mainly comprises a base 1, a static mixer 2, an active gas input pipe 3, an active gas input valve 4, an active gas flow meter 5, a follow-up gas input pipe 6, a follow-up gas input valve 7, a follow-up gas flow meter 8, a mixed gas output pipe 9, a methane analyzer 10, a mixed gas flow meter 11, a filtering device 12, a check valve 13, a heat value meter 14, a mixed gas output valve 15, a blow-off valve 16 and a control cabinet 17, wherein the base 1 is of a skid-mounted structure and is used for bearing parts of the whole set of equipment, so that the whole set of equipment is formed, and the hydrogen-natural gas mixing mechanism is convenient to mount, dismount, maintain and transport, and when in use, the hydrogen-natural gas mixing mechanism is divided into the following steps to complete mixing of hydrogen and natural gas:
step one, operation preparation: firstly, checking the inlet pressure of the active gas input pipe 3 and the inlet pressure of the follow-up gas input pipe 6, and ensuring that the pressures meet the gas mixing requirement, wherein when the pressures of the active gas input pipe 3 and the follow-up gas input pipe 6 cannot meet the gas mixing requirement, the whole gas mixing system device does not have a starting condition, an active gas flow meter 5 is arranged at the position of the active gas input pipe 3 close to the pipeline input port and is used for monitoring the inlet pressure of the active gas input pipe 3, and similarly, a follow-up gas flow meter 8 is arranged at the position of the follow-up gas input pipe 6 close to the pipeline input port and is used for monitoring the inlet pressure of the follow-up gas input pipe 6, so that a worker can conveniently read monitoring data and judge whether to start the whole device; then, confirming that the gas mixing pry interlocking switch on the control cabinet 17 is in a cutting-off position; then, confirming that the active gas input valve 4, the follow-up gas input valve 7, the mixed gas output valve 15 and the blow-down valve 16 are in the 'off' positions, wherein the 'off' positions are used for ensuring the pipeline closure of the natural gas before blending hydrogen, so that in the subsequent use, a worker can more accurately capture monitoring data and improve the operation safety, and other valves are in the 'on' positions; in addition, the piping network must be replaced with nitrogen prior to initial startup.
Step two, inflating and injecting: the staff firstly closes the main power switch of the upper switch cabinet to supply power to the control cabinet 17; then, the display of each instrument on the control cabinet 17 is confirmed to be normal; then, slowly opening an inlet valve on the main pipeline to allow natural gas to enter from the active gas input pipe 3 and allow hydrogen to enter from the follow-up gas input pipe 6, and observing the pressure value of the active gas flowmeter 5 on the active gas input pipe 3 and the pressure value of the follow-up gas flowmeter 8 on the follow-up gas input pipe 6 by a worker to allow the pressure values of the natural gas and the hydrogen to respectively reach the gas mixing requirement; then, opening the active gas input valve 4, enabling the natural gas to enter the static mixer 2, and simultaneously, slowly opening the follow-up gas input valve 7 under the manual operation state of the control cabinet 17 system, enabling the hydrogen to also enter the static mixer 2, and starting gas mixing, wherein at the moment, two paths of flow meters, namely the active gas flow meter 5 and the follow-up gas flow meter 8 respectively indicate the flow rate of the natural gas and the flow rate of the hydrogen; the active gas input valve 4 adopts a screwed manual ball valve, which is convenient for opening and closing natural gas conveying operation, and the follow-up gas input valve 7 adopts a manual-automatic integrated electric control airflow valve, so that after an operator manually opens the follow-up gas input valve 7 in a control cabinet 17 system, the flow can be automatically controlled according to a set pressure value.
Step three, mixing reaction: the natural gas and the hydrogen enter the static mixer 2 to be mixed, the static mixer 2 adopts a baffle type gas mixer with a square pipe network, has the characteristic of strong corrosion resistance, and the baffle type structure is easy to replace and clean, baffle plate mixing unit bodies in the static mixer 2 uniformly flow into a rear pipe network, the natural gas and the hydrogen can be thoroughly mixed, and in the process of mixing operation, the flow pressure of mixing the two gases can be ensured, so that the mixing process is more stable; a blow-off valve 16 is provided at the lower part of the static mixer 2 for discharging the condensed water generated in the course of mixing the gas, and the blow-off valve 16 is also a screw-on manual ball valve, which can be easily opened and closed by the operator.
Step four, mixed gas output: the mixed gas of the natural gas and the hydrogen mixed by the static mixer 2 is conveyed out along a mixed gas output pipe 9, firstly passes through a methane analyzer 10 for monitoring the methane coefficient to judge whether the mixed gas reaches a set value, and one side of the methane analyzer 10 is also provided with a mixed gas flowmeter 11, the methane analyzer 10 and the mixed gas flowmeter 11 are mutually matched for use to adjust the opening of a follow-up gas input valve 7 on a follow-up gas input pipe 6, and the follow-up gas input valve 7 adopts a manual and automatic integrated electric control airflow valve and is controlled by the set value in the methane analyzer 10 by a control cabinet 17, so that the mixing ratio of the two gases is adjusted, and the output mixed gas reaches a set ideal state; then, the mixed gas is continuously output through the filtering device 12, and the filtering device 12 adopts a Y-shaped filter, so that impurities in the mixed gas can be filtered out, and the purifying and purifying effects are achieved; then, the filtered and purified mixed gas enters a heat value instrument 14 through a check valve 13, the check valve 13 can ensure the one-way delivery of the gas flow, and the influence caused by backflow is avoided, the heat value instrument 14 is used for monitoring the heat productivity of the mixed gas before output, if abnormal conditions exist, a worker can close a mixed gas output valve 15 at the first time, and the mixed gas output valve 15 also adopts a screwing type manual ball valve, so that the worker can conveniently control the opening and closing of the output of the mixed gas; in addition, the control cabinet 17 is provided with an intelligent controller 18, the intelligent controller 18 can monitor flow and pressure parameters, automatically control methane concentration and mixed gas heat value, has high precision, sensitive response and stable operation, when a worker observes that the mixed gas outlet gas parameters on the intelligent controller 18 meet the requirements of users, the worker can adjust the whole set of mixed gas system equipment to be put into automatic state operation through the intelligent controller 18, and simultaneously switches the mixed gas pry interlock switch on the control cabinet 17 from 'cut' to 'put' to allow the equipment to enter a normal mixed gas state; the control cabinet 17 has a parameter self-locking function to prevent other people from changing the set working condition at will.
Step five, closing and stopping the operation: firstly, the whole set of system equipment is switched from an automatic operation state to a manual operation state through the control cabinet 17; then, firstly closing the active gas input valve 4 on the active gas input pipe 3 to cut off the injection of the natural gas, and then immediately closing the follow-up gas input valve 7 on the follow-up gas input pipe 6 to cut off the injection of the hydrogen; then, the mixed gas output valve 15 is closed, and a corresponding selection switch on the control cabinet 17 is switched off; then, all valves on the whole set of system equipment are closed; when the shutdown time is long, the residual gas in the static mixer 2 and in each pipeline should be discharged.
The parameters of the whole set of equipment are set as follows: the maximum flow rate is 100Nm3/h, the design pressure is 20KPa, the pressure loss is delta P less than or equal to 1KPa, the void ratio is less than 98.5 percent, and the unevenness is as follows: less than 5%, uniform dot length: less than 3-5 DN.
The whole set of equipment adopts the mixed gas thinking design of variable proportion, the variable flow for two kinds of gases of hydrogen and natural gas get into the blender according to certain proportion, come to carry out automatically regulated to the aperture of hydrogen flow control valve port through methane analysis appearance and the flowmeter of gas mixture export, adjust the mixed proportion of two kinds of gases, the mixed gas that the output meets the requirements, and the cooperation intelligent control mechanism can realize the flow, pressure parameter is kept watch on, carry out automatic control to methane concentration and gas mixture calorific value, overall structure is compacter, simple to operate, be convenient for maintain, the controllability of natural gas and hydrogen mixture has been promoted, the supervision precision is high, the reaction is sensitive, the operation is more safe and stable, be applicable to the blending of various gas such as liquefied petroleum gas, the natural gas, generator gas.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", "end", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (7)

1. A static natural gas hydrogen-loading mixing mechanism is characterized in that: the device comprises a base, a static mixer, an active gas input pipe, an active gas input valve, an active gas flowmeter, a follow-up gas input pipe, a follow-up gas input valve, a follow-up gas flowmeter, a mixed gas output pipe, a methane analyzer, a mixed gas flowmeter, a filtering device, a check valve, a heat value instrument, a mixed gas output valve, a blow-down valve and a control cabinet, wherein the static mixer is positioned at the upper part of the base, the static mixer is fixedly connected with the base, the active gas input pipe is positioned at one side of the static mixer, the active gas input pipe is fixedly connected with the static mixer, the active gas input valve and the active gas flowmeter are both positioned at the middle part of the active gas input pipe, the active gas input valve is positioned at a position close to the connecting end of the active gas input pipe and the static mixer, and the active gas flowmeter and the active gas input pipe are both fixedly connected with the active gas input pipe, the follow-up gas input pipe is positioned at one side of the main gas input pipe, the follow-up gas input pipe is fixedly connected with the static mixer, the follow-up gas input valve and the follow-up gas flow meter are all positioned in the middle of the follow-up gas input pipe, the follow-up gas input valve is positioned at a position close to the connecting end of the follow-up gas input pipe and the static mixer, the follow-up gas input valve and the follow-up gas flow meter are both fixedly connected with the follow-up gas input pipe, the mixed gas output pipe is positioned at the other side of the static mixer, the mixed gas output pipe is fixedly connected with the static mixer, the methane analyzer, the mixed gas flowmeter, the filtering device, the check valve, the heat value meter and the mixed gas output valve are all positioned in the middle of the mixed gas output pipe, the methane analyzer is positioned at a position close to the connecting end of the mixed gas output pipe and the static mixer, and the methane analyzer is fixedly connected with the mixed gas output pipe, the methane analyzer is connected with the follow-up gas input valve and the control cabinet by a circuit, the mixed gas flowmeter is positioned on one side of the methane analyzer, the mixed gas flowmeter is fixedly connected with the methane analyzer, the filtering device is positioned at the next stage of the methane analyzer, the filtering device is fixedly connected with the mixed gas output pipe, the check valve is positioned at the next stage of the filtering device, the check valve is fixedly connected with the mixed gas output pipe, the heat value meter is positioned at the next stage of the check valve, the heat value meter is fixedly connected with the mixed gas output pipe, the mixed gas output valve is positioned at the next stage of the heat value meter, the mixed gas output valve is fixedly connected with the mixed gas output pipe, the mixed gas output valve is connected with the control cabinet by a circuit, the blow-down valve is positioned at the lower part of the static mixer, and the blow-down valve is fixedly connected with the static mixer, the control cabinet is located the upper portion of base, the control cabinet is fixed connection with the base, still be equipped with the intelligent control appearance on the control cabinet, the intelligent control appearance is located one side of control cabinet, the intelligent control appearance is fixed connection with the control cabinet.
2. The static natural gas loading and mixing mechanism of claim 1, wherein: the base is of a skid-mounted structure.
3. The static natural gas loading and mixing mechanism of claim 1, wherein: the static mixer is a baffle plate type gas mixer with a square pipe network.
4. The static natural gas loading and mixing mechanism of claim 1, wherein: the active gas input valve, the mixed gas output valve and the blow-down valve are all screwed manual ball valves.
5. The static natural gas loading and mixing mechanism of claim 1, wherein: the follow-up air input valve is a manual-automatic integrated electric control airflow valve.
6. The static natural gas loading and mixing mechanism of claim 1, wherein: the filtering device is a Y-shaped filter.
7. The working method of the static natural gas hydrogen-loading mixing mechanism according to the claims 1-6 comprises the following steps:
step one, operation preparation: firstly, checking the inlet pressure of an active air input pipe and the inlet pressure of a follow-up air input pipe, and ensuring that the pressure meets the requirement of air mixing, wherein when the pressure of the active air input pipe and the pressure of the follow-up air input pipe can not meet the requirement of air mixing, the whole set of air mixing system equipment does not have a starting condition; then, confirming that a gas mixing pry interlocking switch on the control cabinet is in a cutting-off position; then, confirming that the active gas input valve, the follow-up gas input valve, the mixed gas output valve and the blow-down valve are in the 'closed' positions, wherein the active gas input valve, the follow-up gas input valve, the mixed gas output valve and the blow-down valve are used for ensuring the pipeline closure of the natural gas before blending the hydrogen gas, so that in the subsequent use, a worker can more accurately capture monitoring data and improve the operation safety, and other valves are all in the 'open' positions; in addition, before the initial start, the pipe network must be replaced by nitrogen;
step two, inflating and injecting: the working personnel firstly close the main power switch of the upper-level switch cabinet to supply power to the control cabinet; then, confirming that the display of each instrument on the control cabinet is normal; then, slowly opening an inlet valve on the main pipeline, allowing natural gas to enter from the active gas input pipe, and allowing hydrogen to enter from the follow-up gas input pipe, and observing the pressure value of the active gas flowmeter on the active gas input pipe and the pressure value of the follow-up gas flowmeter on the follow-up gas input pipe by a worker, so that the pressure values of the natural gas and the hydrogen respectively reach the gas mixing requirement; then, opening an active gas input valve to enable natural gas to enter a static mixer, and simultaneously, slowly opening a follow-up gas input valve in a manual operation state of a control cabinet system to enable hydrogen to enter the static mixer to start gas mixing, wherein at the moment, two flow meters, namely an active gas flow meter and a follow-up gas flow meter, respectively indicate the flow rates of the natural gas and the hydrogen;
step three, mixing reaction: the natural gas and the hydrogen enter the static mixer for mixing, the static mixer adopts a baffle plate type gas mixer with a square pipe network and has the characteristic of strong corrosion resistance, baffle plate mixing unit bodies in the static mixer flow into a rear pipe network after being uniform, the natural gas and the hydrogen can be thoroughly mixed, and in the process of mixing operation, the flow pressure of mixing the two gases can be ensured, so that the mixing process is more stable;
step four, mixed gas output: the mixed gas of the natural gas and the hydrogen mixed by the static mixer is conveyed out along a mixed gas output pipe, firstly passes through a methane analyzer and is used for monitoring a methane coefficient to judge whether the mixed gas reaches a set value, and a mixed gas flowmeter is also arranged on one side of the methane analyzer; then, the mixed gas is continuously output through a filtering device, and the filtering device adopts a Y-shaped filter, so that impurities in the mixed gas can be filtered out, and the purifying and purifying effects are achieved; then, the filtered and purified mixed gas enters a heat value instrument through a check valve, the check valve can ensure the one-way delivery of the gas flow and avoid the influence caused by backflow, the heat value instrument is used for monitoring the heating value of the mixed gas before output, and if abnormal conditions exist, a worker can close the mixed gas output valve at the first time; in addition, an intelligent controller is arranged on the control cabinet, the intelligent controller can monitor flow and pressure parameters, automatically control methane concentration and mixed gas heat value, has high precision, sensitive response and stable operation, and can adjust the whole set of mixed gas system equipment to be put into automatic state operation through the intelligent controller when a worker observes that the mixed gas outlet gas parameters on the intelligent controller meet the requirements of users, and simultaneously, the mixed gas pry interlock switch on the control cabinet is switched from 'cut' to 'put' to ensure that the equipment enters a normal mixed gas state; the control cabinet has a parameter self-locking function so as to prevent other people from changing the set working condition at will;
step five, closing and stopping the operation: firstly, switching the whole set of system equipment from an automatic operation state to a manual operation state through a control cabinet; then, firstly closing the active gas input valve on the active gas input pipe to cut off the injection of the natural gas, and then immediately closing the follow-up gas input valve on the follow-up gas input pipe to cut off the injection of the hydrogen; then, closing the mixed gas output valve, and cutting off a corresponding selection switch on the control cabinet; then, all valves on the whole set of system equipment are closed; when the shutdown time is long, the residual gas in the static mixer and in each pipeline is discharged.
CN202111278850.4A 2021-10-31 2021-10-31 Static natural gas hydrogen-mixing mechanism and working method thereof Withdrawn CN114017674A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023071702A1 (en) * 2022-05-09 2023-05-04 欧科能源技术(天津)有限公司 Natural gas hydrogen-doped mixer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023071702A1 (en) * 2022-05-09 2023-05-04 欧科能源技术(天津)有限公司 Natural gas hydrogen-doped mixer

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Application publication date: 20220208