Intelligent regulation, control, storage and use method for biological natural gas

Abstract

The invention relates to the field of biogas energy utilization, and discloses a biogas intelligent regulation and control storage and use method, which comprises the following steps: carrying out preliminary impurity screening on original biogas, buffering pressure by using a gas buffering device, detecting component preset pressure and temperature range, and carrying out graded pressurization and segmented cooling to obtain biogas. Mixing with a hydrating agent and an accelerant to generate a gas hydrate for storage, judging whether to start a decomposition process or not according to stock and demand data, and establishing a hydrating agent closed-loop recovery mechanism. According to the system, pretreatment means such as impurity screening, pressure buffering, staged pressurization and staged cooling are combined with a decomposition process dynamic regulation and control and hydration agent recycling mechanism based on real-time data, so that whole-process intelligent management of biogas from purification, storage to gas supply is realized, the hydration reaction efficiency and the stability of a storage system are improved, and the energy consumption is reduced. The continuity and flexibility of gas supply are guaranteed, and meanwhile, the operation cost and the resource consumption are reduced.

Description

Technical Field

[0001] The present invention relates to the field of biogas energy utilization, and in particular to a method for intelligently regulating and storing biogas. Background Art

[0002] As energy structure transformation accelerates, biogas, a renewable and clean energy source, faces challenges in efficient storage and intelligent regulation, becoming key to its development. While biogas production from fermentation has steadily increased in recent years, traditional storage and utilization technologies have lagged behind this growth. Breaking through existing technological bottlenecks is crucial to improving energy utilization and meeting growing energy demands.

[0003] Traditional biogas storage methods, such as gas cabinets and compressed storage, suffer from low storage density, high energy consumption, and high costs. Regarding intelligent control, existing methods often rely on single-variable adjustments and are unable to comprehensively address complex factors such as fluctuations in biogas composition and changes in the storage environment. Hydrator recovery technology is imperfect, leading to catalytic failure caused by impurity accumulation, and the lack of an effective thermal management system results in significant energy waste.

[0004] In view of this, it is necessary to develop a method for intelligent regulation and storage of biogas to solve the problems of low storage efficiency, high energy consumption cost, insufficient regulation accuracy, poor resource recycling and other problems in existing technologies, so as to realize intelligent management of the entire process of biogas from purification, storage to gas supply, improve the utilization efficiency of biogas and the stability of the storage system, ensure the continuity and flexibility of gas supply, and reduce operating costs and resource consumption. Summary of the Invention

[0005] In view of this, the present invention proposes a method for intelligent regulation and storage of biogas, aiming to solve the problems of low efficiency and high energy consumption of traditional storage methods, insufficient intelligent regulation, imperfect hydration agent recovery technology, and poor flexibility of storage systems, and to improve the efficiency and reliability of the entire biogas storage and utilization process.

[0006] In one aspect, the present invention provides a method for intelligently regulating and storing biogas, comprising:

[0007] Conduct preliminary impurity screening on the raw collected biogas;

[0008] Use gas buffer devices to buffer the pressure of the screened biogas and eliminate fluctuations;

[0009] Detecting the components and contents of methane, carbon dioxide, and hydrogen sulfide in the screened biogas using an online gas analyzer, and presetting the pressure range and temperature range of the biogas based on the components;

[0010] Based on the preset pressure range, a gas booster is used to perform a staged pressurization process on the buffered biogas;

[0011] Based on the preset temperature range, the pressurized biogas is subjected to staged temperature reduction treatment using a gas pre-cooling device;

[0012] The cooled biogas is introduced into a hydration reactor, a hydrating agent and a accelerator are added, and a stirring device is used to stir the biogas to generate gas hydrates, and the gas hydrates are transported to a heat-insulating and pressure-maintaining storage tank through a conveying device for storage;

[0013] Collecting and analyzing the inventory data and gas supply demand data of the gas hydrate in the storage tank in real time, and determining whether to start the decomposition process based on the analysis results;

[0014] If it is determined that the decomposition process is to be started, the feeding device is driven to transport the gas hydrate to the decomposer, and the decomposed natural gas is transported to the gas terminal or gas network system;

[0015] If it is determined that the decomposition process is not to be started, the gas terminal or gas network system will be supplied with gas in a backup gas supply mode;

[0016] A closed-loop recovery mechanism for the decomposed hydrated agent is established, and the decomposed hydrated agent is subjected to impurity filtration treatment.

[0017] Furthermore, the hydrating agent is deionized water, and the accelerator is one of cyclodextrins, quaternary ammonium salts or sodium lauryl sulfate.

[0018] Furthermore, the step of introducing the cooled biogas into a hydration reactor, adding a hydrating agent and a accelerator, and stirring the biogas using a stirring device to generate gas hydrates comprises:

[0019] Determine the initial addition amount of the accelerator, the addition amount of the hydrating agent, and the initial stirring speed based on the detected biogas components and their contents, and preset a first time interval and a second time interval;

[0020] Adjusting the amount of accelerator added and the stirring speed based on the real-time pressure increase rate and temperature decrease rate in the hydration reactor obtained during the first time interval and the preset pressure increase rate threshold and temperature decrease rate threshold;

[0021] The stirring speed is adjusted based on the pressure change rate and temperature change rate in the hydration reactor obtained in real time during the second time interval.

[0022] Furthermore, the storage tank includes a first storage tank and a second storage tank, and the first storage tank and the second storage tank are connected by a pipeline;

[0023] The real-time collection and analysis of the inventory data and gas supply demand data of the gas hydrate in the storage tank, and the determination of whether to start the decomposition process based on the analysis results, include:

[0024] Controlling the opening and closing of the pipeline valve based on the inventory data of the first storage tank and the second storage tank and the inventory difference;

[0025] When the inventory data of the first storage tank and the inventory data of the second storage tank are both higher than the lower limit inventory and the inventory difference exceeds the preset difference, it is determined that the decomposition process is started and the valve between the first storage tank and the second storage tank is opened;

[0026] When the inventory data of the first storage tank and the second storage tank are both lower than the preset lower limit inventory, it is determined that the decomposition process will not be started and the valve between the first storage tank and the second storage tank will be closed.

[0027] Furthermore, the driving and feeding device transports the gas hydrate to the decomposer, and transports the decomposed natural gas to a gas terminal or a gas network system, including:

[0028] Presetting a first preset inventory, a second preset inventory, a first preset demand, and a second preset demand based on inventory data of gas hydrates in the storage tank and gas supply demand data, wherein the first preset inventory is greater than the second preset inventory, and the first preset demand is less than the second preset demand;

[0029] Adjusting the temperature and pressure in the decomposer based on the inventory data, the gas supply demand data, the first preset inventory, the second preset inventory, the first preset demand, and the second preset demand;

[0030] The decomposed natural gas is transported to the gas terminal or gas grid system.

[0031] Furthermore, the process of adjusting the temperature and pressure in the decomposer based on the inventory data, the gas supply demand data, the first preset inventory, the second preset inventory, the first preset demand, and the second preset demand includes:

[0032] When the inventory data is higher than the first preset inventory and the gas supply demand data is lower than the first preset demand, the temperature and pressure in the decomposer are adjusted using the first decomposition mode;

[0033] When the inventory data is lower than the second preset inventory or the gas supply demand data is higher than the second preset demand, the second decomposition mode is adopted.

[0034] Furthermore, the first decomposition mode has a decompression rate greater than the heating rate, the second decomposition mode has a heating rate greater than the decompression rate, the heating rate of the first decomposition mode is less than the heating rate of the second decomposition mode, and the decompression rate of the first decomposition mode is greater than the decompression rate of the second decomposition mode.

[0035] Furthermore, the adjusting the amount of accelerator added and the stirring speed based on the real-time obtained pressure increase rate and temperature decrease rate in the hydration reactor during the first time interval and the preset pressure increase rate threshold and temperature decrease rate threshold comprises:

[0036] When the pressure increase rate in the hydration reactor exceeds a preset pressure increase rate threshold during the first time interval, the amount of the accelerator added is reduced and the stirring speed is increased;

[0037] When the cooling rate in the hydration reactor exceeds a preset cooling rate threshold in the first time interval, the amount of the accelerator added is increased and the stirring speed is reduced.

[0038] Furthermore, adjusting the stirring speed based on the pressure change rate and temperature change rate in the hydration reactor obtained in real time during the second time interval includes:

[0039] When the pressure change rate in the hydration reactor exceeds the temperature change rate during the second time interval, the stirring speed is reduced;

[0040] When the pressure change rate in the hydration reactor does not exceed the temperature change rate in the second time interval, the stirring speed is increased.

[0041] Furthermore, the closed-loop recovery mechanism of the decomposed hydrate is established, and the decomposed hydrate is subjected to impurity filtration treatment, including:

[0042] Adjust the impurity filtering method based on the real-time monitoring of the conductivity of the recovered hydrating agent and the preset conductivity threshold;

[0043] When the conductivity of the recovered hydrating agent exceeds a preset conductivity, the number of physical filtrations is increased or the filter material is replaced; the preset conductivity threshold, the rule for increasing the number of physical filtrations, and the condition for replacing the filter material are determined based on the degree of influence of impurities in the hydrating agent on the hydration reaction;

[0044] The hydrating agent after impurity filtration treatment, the decomposed biogas and the accelerator are added to the hydration reactor to carry out the next cycle, and gas hydrates are generated by stirring.

[0045] Furthermore, the impurity filtration treatment includes physical filtration treatment and chemical adsorption treatment;

[0046] Real-time monitoring of physical filtration treatment effect and chemical adsorption efficiency;

[0047] When the physical filtration effect does not meet the preset physical filtration effect standard, adjust the physical filtration parameters or clean the physical filtration equipment;

[0048] When the chemical adsorption efficiency does not reach the preset chemical adsorption efficiency threshold, adjusting the amount of the chemical adsorbent or replacing the chemical adsorbent;

[0049] The preset physical filtration effect standard, preset chemical adsorption efficiency threshold, physical filtration parameter adjustment rules, physical filtration equipment cleaning conditions, chemical adsorbent dosage adjustment rules and chemical adsorbent replacement conditions are determined through experiments and actual application results.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The present invention eliminates mechanical impurities and pressure fluctuations in the original gas through preliminary impurity screening and a gas buffer device, avoids equipment wear and unstable reaction conditions, and improves the reliability of subsequent processes compared to traditional direct treatment methods.

[0052] The present invention is based on the preset pressure and temperature range of gas components and adopts a staged pressurization and segmented cooling strategy. Compared with the existing fixed parameter control, it can accurately match different gas source characteristics and improve the efficiency of the hydration reaction.

[0053] The present invention monitors inventory and demand data in real time, dynamically switches decomposition processes or backup gas supply modes, solves the problem of delayed gas supply response in the prior art, and ensures gas supply continuity.

[0054] The present invention establishes a closed-loop recycling mechanism for hydrating agents, realizes the reuse of hydrating agents by filtering impurities, reduces the consumption of fresh agents, lowers the operating costs, and avoids the waste of water resources and environmental pollution caused by traditional one-time use.

[0055] The invention adopts staged pressurization to prevent the risk of overpressure and staged cooling to avoid the generation of condensed water. Combined with the heat-insulating and pressure-maintaining storage tank, the equipment failure rate is reduced compared with the existing simple pressurization and cooling process, ensuring the safety of operation in high-pressure and low-temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0057] Figure 1 This is a flow chart of a method for intelligently regulating and storing biogas provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0058] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0059] As energy structure transformation accelerates, biogas, a renewable and clean energy source, faces challenges in efficient storage and intelligent regulation, becoming key to its development. While biogas production from fermentation has steadily increased in recent years, traditional storage and utilization technologies have lagged behind this growth. Breaking through existing technological bottlenecks is crucial to improving energy utilization and meeting growing energy demands.

[0060] Traditional biogas storage methods, such as gas cabinets and compressed storage, suffer from low storage density, high energy consumption, and high costs. Regarding intelligent control, existing methods often rely on single-variable adjustments and are unable to comprehensively address complex factors such as fluctuations in biogas composition and changes in the storage environment. Hydrator recovery technology is imperfect, leading to catalytic failure caused by impurity accumulation, and the lack of an effective thermal management system results in significant energy waste.

[0061] Therefore, it is of great practical significance to develop an intelligent regulation and storage method for biogas to solve the problems of low storage efficiency, high energy consumption cost, insufficient regulation accuracy, and poor resource recycling in existing technologies, and to realize efficient, intelligent, and green storage and utilization of the entire biogas process.

[0062] Reference Figure 1 In some embodiments of the present application, a method for intelligently regulating and storing biogas includes:

[0063] S1. Perform preliminary impurity screening on the originally collected biogas.

[0064] S2. Use a gas buffer device to buffer the pressure of the screened biogas to eliminate fluctuations.

[0065] S3. Detect the components and contents of methane, carbon dioxide, and hydrogen sulfide in the screened biogas using an online gas analyzer, and preset the pressure range and temperature range of the biogas according to the components.

[0066] S4. Based on the preset pressure range, a gas booster is used to perform a staged pressurization process on the buffered biogas.

[0067] S5. Based on the preset temperature range, the pressurized biogas is cooled in stages using a gas pre-cooling device.

[0068] S6. Introducing the cooled biogas into a hydration reactor, adding a hydrating agent and a accelerator, stirring with a stirring device to generate gas hydrates, and transporting the gas hydrates to a heat-insulating and pressure-maintaining storage tank through a conveying device for storage.

[0069] S7. Collect and analyze the inventory data and gas supply demand data of the gas hydrate in the storage tank in real time, and determine whether to start the decomposition process based on the analysis results.

[0070] Among them, if it is determined that the decomposition process is to be started, the feeding device is driven to transport the gas hydrate to the decomposer, and the decomposed natural gas is transported to the gas terminal or gas network system; if it is determined that the decomposition process is not to be started, the gas terminal or gas network system is supplied with gas in a backup gas supply mode.

[0071] S8. Establish a closed-loop recovery mechanism for the decomposed hydrated agent, and perform impurity filtration on the decomposed hydrated agent.

[0072] Specifically, the hydrating agent is deionized water, and the accelerator is one of cyclodextrins, quaternary ammonium salts or sodium lauryl sulfate.

[0073] Specifically, large particle impurities such as dust and droplets are removed from biogas through physical filtration to prevent equipment clogging and reduce interference with subsequent reactions.

[0074] Specifically, a gas buffer device is used to eliminate gas source pressure fluctuations, provide stable input conditions for subsequent pressurization, and avoid equipment damage or uncontrolled reaction caused by sudden pressure changes.

[0075] Specifically, real-time data on components such as methane, carbon dioxide, and hydrogen sulfide are obtained through online gas analyzers. Based on the hydration reaction characteristics of different components, such as the hydration pressure threshold increased by carbon dioxide, the pressure and temperature ranges are preset to ensure that the hydration reaction proceeds within the thermodynamically optimal range.

[0076] Specifically, a multi-stage boosting mode is used to gradually increase the gas pressure to a preset range to avoid excessive energy consumption or pressure overshoot in a single-stage boosting mode. At the same time, real-time monitoring with a pressure sensor is used to ensure safety.

[0077] Specifically, the pre-cooling device is used to reduce the temperature of the pressurized gas in stages to the low temperature required for the hydration reaction, such as 0-10°C. The temperature is first quickly lowered to improve efficiency, and then the temperature is precisely controlled to prevent the formation of condensed water and optimize the reaction kinetics conditions.

[0078] It is understood that the hydration reaction is an exothermic process, which requires temperature reduction and pressure increase during the reaction.

[0079] Specifically, stirring is used to enhance gas-liquid mixing in the reactor, and deionized water and specific promoters, such as sodium lauryl sulfate, are used to reduce surface tension and accelerate hydrate formation. The generated hydrates are stored in an insulated and pressure-maintaining tank, utilizing their high-density characteristics to achieve efficient energy storage.

[0080] Specifically, based on the real-time matching of inventory data and gas supply demand, the conventional decomposition process is used for gas supply first. If the inventory is insufficient or the demand surges, the backup plan is activated, such as switching to an external gas source, to ensure the continuity of gas supply.

[0081] Specifically, the decomposed hydrating agent is filtered for impurities to remove residual ions, organic matter, etc. from the reaction, so as to achieve recycling and reduce water consumption and chemical costs.

[0082] It can be seen that through component detection, parameter preset and dynamic regulation, automated management from gas source to gas supply is achieved, manual intervention is reduced, and the system response speed is improved; staged pressurization and segmented cooling optimize energy consumption distribution, and the use of promoters lowers the threshold of reaction conditions and improves hydrate formation efficiency; hydration agent recovery reduces resource waste and reduces operating costs; pressure buffering, multi-level monitoring and backup gas supply mechanism ensure stable operation of the gas supply process, avoid risks such as overpressure and overheating, and improve gas supply reliability.

[0083] Reference Figure 1 In some embodiments of the present application, the cooled biogas is introduced into a hydration reactor, and a hydrating agent and a promoter are added at the same time, and a stirring device is used to stir to generate gas hydrates, including: determining the initial promoter addition amount, the hydrating agent addition amount and the initial stirring speed based on the detected biogas components and their contents, and presetting a first time interval and a second time interval; adjusting the promoter addition amount and the stirring speed based on the pressure increase rate and the temperature decrease rate in the hydration reactor obtained in real time during the first time interval and the preset pressure increase rate threshold and the temperature decrease rate threshold; adjusting the stirring speed based on the pressure change rate and the temperature change rate in the hydration reactor obtained in real time during the second time interval.

[0084] Specifically, the composition of biogas directly impacts the difficulty of the hydration reaction. For example, if the methane content is high, hydration is more likely to occur. This can be achieved by reducing the amount of accelerator, such as by reducing the amount of sodium lauryl sulfate by 10%-20%, and lowering the initial stirring speed, for example, from 300 to 250 rpm, to avoid excessive energy consumption. If the carbon dioxide or hydrogen sulfide content is high, the accelerator dosage should be increased, the surfactant concentration should be raised to offset the inhibitory effects of impurities, and the initial stirring speed should be increased, for example, from 300 to 350 rpm, to enhance gas-liquid mixing.

[0085] It is understandable that initial conditions are tailored based on component properties to avoid inefficient reactions or reagent waste caused by “one-size-fits-all” parameters.

[0086] Specifically, in the first time interval, the pressure increase rate reflects the gas dissolution rate and the hydrate nucleation rate. Too fast a pressure increase may cause agglomeration due to local oversaturation; the cooling rate reflects the exothermic intensity of the reaction. Too slow a cooling rate may cause temperature to exceed the limit due to insufficient heat dissipation.

[0087] Specifically, in the second time interval, the pressure change rate represents the gas consumption rate, and the temperature change rate represents the reaction heat release rate, which reflects the reaction activity.

[0088] It can be understood that the first time interval is an unstable period of the hydration reaction, and the second time interval is a stable period of the hydration reaction.

[0089] It can be seen that according to the different characteristics of different reaction processes of hydration reaction, differentiated control strategies are implemented to fit the actual progress of the hydration reaction, and the pressure and temperature changes are deeply bound with the addition of reagents and stirring speed to form a "detection-analysis-adjustment" closed loop to achieve the optimization of reaction efficiency and energy consumption.

[0090] Reference Figure 1 In some embodiments of the present application, the storage tank includes a first storage tank and a second storage tank, and the first storage tank and the second storage tank are connected by a pipeline.

[0091] Specifically, the inventory data and gas supply demand data of the gas hydrates in the storage tanks are collected and analyzed in real time, and whether to start the decomposition process is determined based on the analysis results, including: controlling the opening and closing of the pipeline valve based on the inventory data of the first storage tank and the second storage tank and the inventory difference; when the inventory data of the first storage tank and the inventory data of the second storage tank are both higher than the lower limit inventory and the inventory difference exceeds the preset difference, it is determined that the decomposition process is started and the valve between the first storage tank and the second storage tank is opened; when the inventory data of the first storage tank and the second storage tank are both lower than the preset lower limit inventory, it is determined that the decomposition process is not started and the valve between the first storage tank and the second storage tank is closed.

[0092] Specifically, the first and second storage tanks are connected via a pipeline with valves, forming an interconnected storage unit. Each tank is equipped with independent inventory monitoring devices, such as pressure sensors and liquid level gauges, to collect real-time gas hydrate inventory data.

[0093] It is understandable that achieving pressure balance and inventory allocation between the two tanks can avoid overloading or underloading of a single tank and extend the overall gas supply time.

[0094] Specifically, when the inventory in both tanks is higher than the lower limit and the difference exceeds the preset difference, it means that the inventory in the storage tank is high and balanced. At this time, the connecting valve is opened, and the high-pressure tank transports hydrates to the low-pressure tank until the pressure is balanced to meet the stability demand; when the inventory in both tanks is lower than the lower limit, the connecting valve is closed, and a single tank supplies gas independently. The other tank retains the minimum inventory as a "pressure anchor point" to prevent the system from losing pressure, and the backup gas supply plan is activated, such as switching to an external gas source.

[0095] It can be seen that through dynamic balance, the average utilization rate of the dual tanks can be improved and the gas supply stability can be enhanced; the gas supply mode can be intelligently switched according to the inventory status to ensure continuous gas supply while avoiding the risk of system pressure collapse.

[0096] Reference Figure 1 In some embodiments of the present application, a feeding device is driven to transport the gas hydrate to a decomposer, and the decomposed natural gas is transported to a gas terminal or a gas network system, including: presetting a first preset inventory, a second preset inventory, a first preset demand, and a second preset demand based on the inventory data of the gas hydrate in the storage tank and the gas supply demand data, wherein the first preset inventory is greater than the second preset inventory, and the first preset demand is less than the second preset demand; adjusting the temperature and pressure in the decomposer based on the inventory data, the gas supply demand data, and the first preset inventory, the second preset inventory, the first preset demand, and the second preset demand; and transporting the decomposed natural gas to a gas terminal or a gas network system.

[0097] Specifically, the first preset inventory is the "high inventory" critical value. At this time, the system has sufficient buffer space and can adopt an energy-saving decomposition mode. The second preset inventory is the "low inventory" critical value. At this time, the high-efficiency decomposition mode needs to be activated to avoid gas supply interruption. The first preset demand is the "low demand" critical value, which corresponds to non-peak hours (such as nighttime) and the decomposition load is low. The second preset demand is the "high demand" critical value, which corresponds to industrial gas peaks or emergency scenarios and requires a quick response.

[0098] Specifically, by fitting thresholds with historical gas supply data, continuous inventory or demand variables are divided into discrete operating conditions, providing a decision-making benchmark for automated control.

[0099] Specifically, when the inventory is high and the demand is low, the "low temperature and slow pressure reduction" mode is adopted. For example, the temperature is set to 5°C, close to the lower limit of the hydrate stability temperature, and the pressure drop rate is controlled at 0.2MPa / min.

[0100] It is understandable that maintaining hydrate stability in a low-temperature environment and slowly reducing pressure can reduce energy consumption while avoiding excessive decomposition that leads to waste of inventory.

[0101] When the inventory is low and the demand is high, the "high temperature and fast pressure reduction" mode is adopted. For example, if the temperature is set to 15°C, the decomposition kinetics rate is increased and the pressure drop rate is increased to 0.8MPa / min.

[0102] It is understandable that by increasing the temperature to break through the decomposition activation energy barrier, and combining with rapid pressure reduction to accelerate gas release, short-term high-load demands can be met.

[0103] Specifically, when there is high inventory and high demand, or low inventory and low demand, linear interpolation is used to calculate the temperature or pressure parameters to achieve a smooth transition.

[0104] It can be seen that customizing the decomposition conditions for different working conditions can avoid inefficiency or energy waste caused by a "one-size-fits-all" model.

[0105] Specifically, the gas supply rate is monitored in real time through the decomposer outlet flow sensor, and after comparing it with the demand data, the temperature or pressure parameters are dynamically adjusted. When the difference in the inventory of the two tanks is large, the gas supply is decomposed from the tank with higher inventory first, and the pressure of the two tanks is balanced through the pipeline valve to avoid decomposition interruption due to pressure fluctuations in the low-pressure tank.

[0106] It can be seen that the threshold system based on historical data upgrades the decomposition process from "empirical control" to "data intelligent control", thereby improving the accuracy of regulation.

[0107] Reference Figure 1 In some embodiments of the present application, the process of adjusting the temperature and pressure in the decomposer based on the inventory data, gas supply demand data, and the first preset inventory, the second preset inventory, the first preset demand, and the second preset demand includes: when the inventory data is higher than the first preset inventory and the gas supply demand data is lower than the first preset demand, adopting the first decomposition mode to adjust the temperature and pressure in the decomposer; when the inventory data is lower than the second preset inventory or the gas supply demand data is higher than the second preset demand, adopting the second decomposition mode.

[0108] It is understood that when the inventory data is higher than the first preset inventory and the gas supply demand data is lower than the first preset demand, that is, high inventory and low demand, a small temperature increase and rapid pressure reduction method is adopted to maintain basic gas supply with minimal energy consumption and prolong the duration of the high inventory state. When the inventory data is lower than the second preset inventory or the gas supply demand data is higher than the second preset demand, that is, low inventory and high demand, a large temperature increase and slow pressure reduction method is adopted to maximize the gas supply capacity per unit inventory and prevent gas supply interruptions.

[0109] Reference Figure 1In some embodiments of the present application, the first decomposition mode is a mode in which the decompression rate is greater than the heating rate, the second decomposition mode is a mode in which the heating rate is greater than the decompression rate, the heating rate of the first decomposition mode is less than the heating rate of the second decomposition mode, and the decompression rate of the first decomposition mode is greater than the decompression rate of the second decomposition mode.

[0110] Understandably, the first decomposition mode leverages the initial pressure advantage of the high-capacity tank to release gas through rapid decompression, reducing reliance on the heating system. The low temperature maintains hydrate stability, preventing premature melting of undecomposed hydrates due to excessive heating, which would waste storage resources. The second decomposition mode rapidly heats up, utilizing the high temperature environment to significantly increase the decomposition reaction rate. Even with a slow decompression, large amounts of gas can be released in a short period of time.

[0111] It is understandable that when the gas supply demand is stable and the gas supply is sufficient, the gas is supplied in the first decomposition mode. During periods of concentrated gas consumption or in emergency rescue scenarios, the gas is supplied in the first decomposition mode.

[0112] Reference Figure 1 In some embodiments of the present application, the amount of promoter added and the stirring speed are adjusted based on the real-time pressure increase rate and cooling rate in the hydration reactor obtained in the first time interval and the preset pressure increase rate threshold and cooling rate threshold, including: when the pressure increase rate in the hydration reactor in the first time interval exceeds the preset pressure increase rate threshold, the amount of promoter added is reduced and the stirring speed is increased; when the cooling rate in the hydration reactor in the first time interval exceeds the preset cooling rate threshold, the amount of promoter added is increased and the stirring speed is reduced.

[0113] Specifically, in the first time interval, if the pressure increase rate exceeds the limit, the amount of accelerator added is reduced to suppress the reaction rate, while the stirring speed is increased to accelerate heat dissipation and prevent sudden pressure increases from causing equipment risks. If the cooling rate exceeds the limit, the amount of accelerator added is increased to accelerate the reaction to consume heat, while the stirring speed is reduced to reduce mechanical heat generation and maintain a stable temperature.

[0114] It is understandable that it is necessary to respond quickly to abnormal fluctuations in the early stages of the reaction to avoid reaction stagnation or loss of control due to parameter deviation.

[0115] Reference Figure 1 In some embodiments of the present application, the stirring speed is adjusted based on the pressure change rate and temperature change rate in the hydration reactor obtained in real time during the second time interval, including: when the pressure change rate in the hydration reactor during the second time interval exceeds the temperature change rate, the stirring speed is reduced; when the pressure change rate in the hydration reactor during the second time interval does not exceed the temperature change rate, the stirring speed is increased.

[0116] Specifically, in the second time interval, when the pressure drops faster than the temperature, it means that gas consumption dominates and the reaction tends to be gentle. The stirring speed can be reduced, such as from 300 r / min to 250 r / min, to save energy. When the temperature drops faster than the pressure, it means that heat release dominates and the reaction is still active. The stirring speed needs to be increased, such as from 300 r / min to 350 r / min, to enhance mass transfer and promote hydrate formation.

[0117] It can be understood that through dual-parameter correlation analysis, the reaction kinetics and thermodynamic states are dynamically matched to avoid ineffective stirring energy consumption.

[0118] Reference Figure 1 In some embodiments of the present application, a closed-loop recovery mechanism for the decomposed hydrate is established, and the decomposed hydrate is subjected to impurity filtration treatment, including: adjusting the impurity filtration method based on the real-time monitored conductivity of the recovered hydrate and a preset conductivity threshold; when the conductivity of the recovered hydrate exceeds the preset conductivity, increasing the number of physical filtration times or replacing the filter material; adding the hydrate after impurity filtration treatment, the decomposed biogas and the promoter to the hydration reactor for the next cycle, and generating gas hydrates by stirring.

[0119] Specifically, the preset conductivity threshold, the rule for increasing the number of physical filtration times, and the conditions for replacing the filter material are determined based on the degree of influence of impurities in the hydrating agent on the hydration reaction.

[0120] Specifically, conductivity reflects the concentration of ionic impurities in the hydrating agent. Impurity ions can disrupt hydrogen bonds between water molecules, hinder gas molecules from entering the cage structure, and reduce the hydration reaction rate.

[0121] It is understandable that when the conductivity exceeds the standard, increasing the number of physical filtration times or replacing the filter material can reduce the conductivity and restore the purity of the hydrating agent.

[0122] Specifically, the influence of different ion concentrations on the hydration reaction was tested by the controlled variable method, and the filtration accuracy was dynamically adjusted according to the impurity type.

[0123] It is understandable that through the low-cost purification path of "monitoring-filtration-reuse", the hydrating agent is transformed from a "disposable consumable" to a "renewable resource", significantly reducing operating costs.

[0124] Reference Figure 1 In some embodiments of the present application, the impurity filtering process includes physical filtration processing and chemical adsorption processing.

[0125] Specifically, the physical filtration treatment effect and chemical adsorption efficiency are monitored in real time; when the physical filtration effect does not reach the preset physical filtration effect standard, the physical filtration parameters are adjusted or the physical filtration equipment is cleaned; when the chemical adsorption efficiency does not reach the preset chemical adsorption efficiency threshold, the amount of chemical adsorbent is adjusted or the chemical adsorbent is replaced.

[0126] Specifically, the preset physical filtration effect standard, the preset chemical adsorption efficiency threshold, the physical filtration parameter adjustment rules, the physical filtration equipment cleaning conditions, the chemical adsorbent dosage adjustment rules and the chemical adsorbent replacement conditions are determined through experiments and actual application effects.

[0127] It is understandable that coupling physical filtration with chemical adsorption depth and establishing a quantitative control model through experimental data provide a universal solution for the recycling of hydrating agents and save costs.

[0128] It can be seen that the present invention eliminates mechanical impurities and pressure fluctuations in the original gas through preliminary impurity screening and gas buffer devices, avoids equipment wear and unstable reaction conditions, and improves the reliability of subsequent processes compared to traditional direct treatment methods.

[0129] The present invention is based on the preset pressure and temperature range of gas components and adopts a staged pressurization and segmented cooling strategy. Compared with the existing fixed parameter control, it can accurately match different gas source characteristics and improve the efficiency of the hydration reaction.

[0130] The present invention monitors inventory and demand data in real time, dynamically switches decomposition processes or backup gas supply modes, solves the problem of delayed gas supply response in the prior art, and ensures gas supply continuity.

[0131] The present invention establishes a closed-loop recycling mechanism for hydrating agents, realizes the reuse of hydrating agents by filtering impurities, reduces the consumption of fresh agents, lowers the operating costs, and avoids the waste of water resources and environmental pollution caused by traditional one-time use.

[0132] The invention adopts staged pressurization to prevent the risk of overpressure and staged cooling to avoid the generation of condensed water. Combined with the heat-insulating and pressure-maintaining storage tank, the equipment failure rate is reduced compared with the existing simple pressurization and cooling process, ensuring the safety of operation in high-pressure and low-temperature environments.

[0133] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or a combination of software and hardware embodiments. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0134] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0135] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0136] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A method for intelligently regulating and storing biogas, characterized by: Conduct preliminary impurity screening on the raw collected biogas; Use gas buffer devices to buffer the pressure of the screened biogas and eliminate fluctuations; Detecting the components and contents of methane, carbon dioxide, and hydrogen sulfide in the screened biogas using an online gas analyzer, and presetting the pressure range and temperature range of the biogas based on the components; Based on the preset pressure range, a gas booster is used to perform a staged pressurization process on the buffered biogas; Based on the preset temperature range, the pressurized biogas is subjected to staged temperature reduction treatment using a gas pre-cooling device; The cooled biogas is introduced into a hydration reactor, a hydrating agent and a accelerator are added, and a stirring device is used to stir the biogas to generate gas hydrates, and the gas hydrates are transported to a heat-insulating and pressure-maintaining storage tank through a conveying device for storage; Collecting and analyzing the inventory data and gas supply demand data of the gas hydrate in the storage tank in real time, and determining whether to start the decomposition process based on the analysis results; If it is determined that the decomposition process is to be started, the feeding device is driven to transport the gas hydrate to the decomposer, and the decomposed natural gas is transported to the gas terminal or gas network system; If it is determined that the decomposition process is not to be started, the gas terminal or gas network system will be supplied with gas in a backup gas supply mode; A closed-loop recovery mechanism for the decomposed hydrated agent is established, and the decomposed hydrated agent is subjected to impurity filtration treatment.

2. The method for intelligently controlling and storing biogas according to claim 1, characterized in that: The method of introducing the cooled biogas into a hydration reactor, adding a hydrating agent and a accelerator, and stirring the mixture with a stirring device to generate gas hydrates comprises: Determine the initial addition amount of the accelerator, the addition amount of the hydrating agent, and the initial stirring speed based on the detected biogas components and their contents, and preset a first time interval and a second time interval; Adjusting the amount of accelerator added and the stirring speed based on the real-time pressure increase rate and temperature decrease rate in the hydration reactor obtained during the first time interval and the preset pressure increase rate threshold and temperature decrease rate threshold; The stirring speed is adjusted based on the pressure change rate and temperature change rate in the hydration reactor obtained in real time during the second time interval.

3. The method for intelligently controlling and storing biogas according to claim 1, characterized in that: The storage tank includes a first storage tank and a second storage tank, and the first storage tank and the second storage tank are connected by a pipeline; The real-time collection and analysis of the inventory data and gas supply demand data of the gas hydrate in the storage tank, and the determination of whether to start the decomposition process based on the analysis results, include: Controlling the opening and closing of the pipeline valve based on the inventory data of the first storage tank and the second storage tank and the inventory difference; When the inventory data of the first storage tank and the inventory data of the second storage tank are both higher than the lower limit inventory and the inventory difference exceeds the preset difference, it is determined that the decomposition process is started and the valve between the first storage tank and the second storage tank is opened; When the inventory data of the first storage tank and the second storage tank are both lower than the preset lower limit inventory, it is determined that the decomposition process will not be started and the valve between the first storage tank and the second storage tank will be closed.

4. The method for intelligently controlling and storing biogas according to claim 3, characterized in that: The driving and feeding device transports the gas hydrate to the decomposer, and transports the decomposed natural gas to the gas terminal or gas network system, including: Presetting a first preset inventory, a second preset inventory, a first preset demand, and a second preset demand based on inventory data of gas hydrates in the storage tank and gas supply demand data, wherein the first preset inventory is greater than the second preset inventory, and the first preset demand is less than the second preset demand; Adjusting the temperature and pressure in the decomposer based on the inventory data, the gas supply demand data, the first preset inventory, the second preset inventory, the first preset demand, and the second preset demand; The decomposed natural gas is transported to the gas terminal or gas grid system.

5. The method for intelligently controlling and storing biogas according to claim 4, characterized in that: The process of adjusting the temperature and pressure in the decomposer based on the inventory data, the gas supply demand data, the first preset inventory, the second preset inventory, the first preset demand, and the second preset demand includes: When the inventory data is higher than the first preset inventory and the gas supply demand data is lower than the first preset demand, the temperature and pressure in the decomposer are adjusted using the first decomposition mode; When the inventory data is lower than the second preset inventory or the gas supply demand data is higher than the second preset demand, the second decomposition mode is adopted.

6. The method for intelligently controlling and storing biogas according to claim 5, characterized in that: The first decomposition mode has a decompression rate greater than the heating rate, and the second decomposition mode has a heating rate greater than the decompression rate. The heating rate of the first decomposition mode is less than the heating rate of the second decomposition mode, and the decompression rate of the first decomposition mode is greater than the decompression rate of the second decomposition mode.

7. The method for intelligently controlling and storing biogas according to claim 2, characterized in that: The adjusting of the accelerator addition amount and the stirring speed based on the real-time acquired pressure increase rate and temperature decrease rate in the hydration reactor during the first time interval and the preset pressure increase rate threshold and temperature decrease rate threshold comprises: When the pressure increase rate in the hydration reactor exceeds a preset pressure increase rate threshold during the first time interval, the amount of the accelerator added is reduced and the stirring speed is increased; When the cooling rate in the hydration reactor exceeds a preset cooling rate threshold in the first time interval, the amount of the accelerator added is increased and the stirring speed is reduced.

8. The method for intelligently controlling and storing biogas according to claim 2, characterized in that: The adjusting the stirring speed based on the pressure change rate and the temperature change rate in the hydration reactor obtained in real time during the second time interval includes: When the pressure change rate in the hydration reactor exceeds the temperature change rate during the second time interval, the stirring speed is reduced; When the pressure change rate in the hydration reactor does not exceed the temperature change rate in the second time interval, the stirring speed is increased.

9. The method for intelligently controlling and storing biogas according to claim 1, characterized in that: The method of establishing a closed-loop recovery mechanism for the decomposed hydrated agent and filtering the decomposed hydrated agent for impurities comprises: Adjust the impurity filtering method based on the real-time monitoring of the conductivity of the recovered hydrating agent and the preset conductivity threshold; When the conductivity of the recovered hydrating agent exceeds a preset conductivity, the number of physical filtrations is increased or the filter material is replaced; the preset conductivity threshold, the rule for increasing the number of physical filtrations, and the condition for replacing the filter material are determined based on the degree of influence of impurities in the hydrating agent on the hydration reaction; The hydrating agent after impurity filtration treatment, the decomposed biogas and the accelerator are added to the hydration reactor to carry out the next cycle, and gas hydrates are generated by stirring.

10. The method for intelligently controlling and storing biogas according to claim 9, characterized in that: The impurity filtration treatment includes physical filtration treatment and chemical adsorption treatment; Real-time monitoring of physical filtration treatment effect and chemical adsorption efficiency; When the physical filtration effect does not meet the preset physical filtration effect standard, adjust the physical filtration parameters or clean the physical filtration equipment; When the chemical adsorption efficiency does not reach the preset chemical adsorption efficiency threshold, adjusting the amount of the chemical adsorbent or replacing the chemical adsorbent; The preset physical filtration effect standard, preset chemical adsorption efficiency threshold, physical filtration parameter adjustment rules, physical filtration equipment cleaning conditions, chemical adsorbent dosage adjustment rules and chemical adsorbent replacement conditions are determined through experiments and actual application results.

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