Dynamic simulation control method and system for gas washing in electrolytic hydrogen production

Abstract

The invention provides an electrolytic hydrogen production gas washing dynamic simulation control method and system. The method comprises the following steps: acquiring initial gas purity in a gas-liquid separation device and a gas washing device; executing gas washing operation, and obtaining first real-time gas purity, first circulating gas amount and first gas supplementing amount at the t-k moment in the gas washing operation; the second real-time gas purity, the second circulation gas amount and the second gas supplementing amount at the t moment in the gas washing operation are obtained; and according to changes of the first real-time gas purity, the second real-time gas purity, the first circulation gas amount, the second circulation gas amount, the first gas supplementing amount and the second gas supplementing amount in the time period from t-k to t, predicting and executing third real-time gas purity, third circulation gas amount and third gas supplementing amount in the time period from t to t + k. According to the electrolytic hydrogen production gas washing dynamic simulation control method and system provided by the invention, the problem that the safety risk caused by volatility in the electrolytic hydrogen production process in the prior art cannot be completely avoided is solved.

Description

Technical Field

[0001] The present invention relates to the technical field related to electrolytic hydrogen production, and in particular to a method and system for dynamic simulation control of gas washing in electrolytic hydrogen production. Background Art

[0002] With the acceleration of the construction of new power systems, the expected installed capacity of renewable energy such as wind power and photovoltaic power will continue to increase in the future. As a means of energy storage and regulation to match the volatility of renewable energy, hydrogen production by electrolysis will play an increasingly important role in the construction of energy bases in the future.

[0003] During the fluctuating electrolytic hydrogen production process, the purity of the produced hydrogen and oxygen will be affected by the power input. When the input power deviates from the rated full-load power, the purity reduction caused by the mixing of hydrogen and oxygen gases will be more obvious due to the decrease in gas production, which will lead to a reduction in the safety of the electrolytic hydrogen production process. Although key parameters such as alkali liquid flow and pressure can be adjusted to adapt to fluctuating power input, from the perspective of inherent safety, the increased safety risks caused by volatility cannot be completely avoided. At the same time, the adjustment of pressure and gas volume is also limited by the downstream hydrogen demand, and it is impossible to achieve complete free adjustment.

[0004] From the above, we can see that in the current process of hydrogen production by electrolysis, there are safety risks caused by volatility that cannot be completely avoided. Summary of the invention

[0005] The main purpose of the present invention is to provide a dynamic simulation control method and system for gas washing in electrolytic hydrogen production, so as to solve the problem that the safety risks caused by volatility in the process of electrolytic hydrogen production in the prior art cannot be completely avoided.

[0006] In order to achieve the above object, according to one aspect of the present invention, a dynamic simulation control method for gas washing for hydrogen production by electrolysis is provided, and the dynamic simulation control method for gas washing for hydrogen production by electrolysis comprises:

[0007] Obtaining the initial gas purity inside the gas-liquid separation device and the gas scrubber;

[0008] Perform a scrubbing operation, and obtain the first real-time gas purity inside the gas-liquid separation device and the scrubber at time tk during the scrubbing operation, the first circulating gas volume from the gas-liquid separation device to the scrubber, and the first replenishing gas volume from the purification device to the scrubber;

[0009] Obtaining the second real-time gas purity inside the gas-liquid separation device and the gas scrubber at time t during the gas scrubbing operation, the second circulating gas volume from the gas-liquid separation device to the gas scrubber, and the second supplementary gas volume from the purification device to the gas scrubber;

[0010] According to the changes in the first real-time gas purity and the second real-time gas purity, the first circulation gas volume and the second circulation gas volume, the first supplementary gas volume and the second supplementary gas volume in the time period from tk to t, the third real-time gas purity, the third circulation gas volume and the third supplementary gas volume in the time period from t to t+k in the gas washing operation are predicted and executed.

[0011] Furthermore, before obtaining the initial gas purity, the circulating gas volume from the gas-liquid separation device to the gas scrubber and the supplementary gas volume from the purification device to the gas scrubber are set to 0.

[0012] Further, obtaining the initial gas purity inside the gas-liquid separation device and the gas scrubber includes:

[0013] Obtaining the concentration of the target gas in the top area of ​​the gas-liquid separation device;

[0014] Obtaining the concentration of the purified target gas pre-stored inside the gas scrubber;

[0015] The target gas is the concentration of hydrogen or oxygen.

[0016] Further, the scrubbing operation includes a circulation phase and a displacement phase, and the scrubbing operation includes the steps of:

[0017] A circulation stage is executed, in which the reserved purified target gas inside the scrubber forms a gas circulation with the gas in the top area of ​​the gas-liquid separation device, and the mixing degree of the gas in the top area of ​​the gas-liquid separation device and the gas inside the scrubber is controlled by controlling the circulating gas volume;

[0018] Detecting a first concentration of real-time gas inside the scrubber, and stopping the scrubbing operation when the first concentration is greater than or equal to a preset concentration;

[0019] When the first concentration is less than the preset concentration, the replacement phase is started;

[0020] In the replacement stage, the target gas purified by the purification device enters the interior of the scrubbing device with a preset gas supply volume. When the content of the target gas inside the scrubbing device is a second concentration, the second concentration is greater than the preset concentration, and the replacement stage is stopped. The internal gas of the scrubbing device and the gas at the top of the gas-liquid separation device circulate with a preset circulation gas volume. The third concentration of the target gas inside the scrubbing device. When the third concentration is greater than or equal to the preset concentration, the scrubbing operation is stopped. When the third concentration is less than the preset concentration, the replacement stage is started, and the above steps are repeated. When the concentration of the target gas in the internal gas of the scrubbing device is greater than or equal to the preset concentration, the scrubbing operation is stopped.

[0021] Further, the first concentration is not greater than 80% of the concentration of the purified target gas; and the second concentration is greater than 90% of the concentration of the purified target gas.

[0022] According to another aspect of the present invention, there is provided an electrolytic hydrogen production gas washing system, which uses the above-mentioned electrolytic hydrogen production gas washing dynamic simulation control method, and the electrolytic hydrogen production gas washing system comprises a gas-liquid separation device; a purification device, each gas-liquid separation device is respectively connected to the purification device and supplies gas to the inside of the purification device; a gas washing device, the gas washing device has a first gas inlet, a second gas inlet and a gas outlet, the purification device and the first gas inlet are switchable, the gas-liquid separation device and the second gas inlet are switchable, and the gas-liquid separation device and the gas outlet are switchable.

[0023] Furthermore, the electrolytic hydrogen production and gas washing system also includes a pipe assembly, which includes a first pipe body, which is arranged between the gas-liquid separation device and the purification device; a second pipe body, which is arranged between the purification device and the gas washing device; and a circulating pipe body, which includes a third pipe body and a fourth pipe body arranged between the gas washing device and the gas-liquid separation device.

[0024] Furthermore, the electrolytic hydrogen production and gas washing system also includes a pump assembly, which includes a first pump body, which is arranged on the second pipe body and is used to adjust the amount of gas supplement; a second pump body, which is arranged on the third pipe body and is used to adjust the amount of circulating gas; and a third pump body, which is arranged on the fourth pipe body and is used to adjust the amount of circulating gas.

[0025] Furthermore, the gas scrubbing device includes a gas storage tank, and the gas pressure inside the gas storage tank is dynamically balanced with the gas pressure in the top area of ​​the gas-liquid separation device.

[0026] Furthermore, the electrolytic hydrogen production gas washing system also includes a gas concentration detector, and the top area inside the gas washing device, the second gas inlet of the gas washing device, the gas outlet of the gas washing device and the top area inside the gas-liquid separation device are respectively provided with gas concentration detectors.

[0027] Applying the technical solution of the present invention, the present application provides a dynamic simulation control method for gas washing in electrolysis for hydrogen production, including obtaining the initial gas purity inside a gas-liquid separation device and a gas washing device; performing a gas washing operation, and obtaining the first real-time gas purity inside the gas-liquid separation device and the gas washing device at time tk in the gas washing operation, the first circulating gas volume from the gas-liquid separation device to the gas washing device, and the first gas replenishment volume from the purification device to the gas washing device; obtaining the second real-time gas purity inside the gas-liquid separation device and the gas washing device at time t in the gas washing operation, the second circulating gas volume from the gas-liquid separation device to the gas washing device, and the second gas replenishment volume from the purification device to the gas washing device; predicting and executing the third real-time gas purity, the third circulating gas volume, and the third gas replenishment volume in the time period t to t+k in the gas washing operation according to changes in the first real-time gas purity and the second real-time gas purity, the first circulating gas volume and the second circulating gas volume, and the first gas replenishment volume and the second gas replenishment volume in the time period tk to t.

[0028] The dynamic simulation operation of the gas washing of the present application adjusts the circulating gas volume and the gas replenishment volume in advance through simulation prediction, thereby achieving the purpose of improving purification efficiency and precision control. Specifically, by testing the gas purity within a period of time, the gas purity and operating parameters in the future period of time are adjusted within a certain limit range, thereby improving the accuracy of the adjustment, thereby achieving an increase in the concentration of the target gas inside the gas-liquid separation device, and improving the gas purity stored above the gas-liquid separation device of the electrolytic hydrogen production equipment, thereby increasing the safety of the electrolytic hydrogen production gas washing system during the fluctuating operation process; at the same time, improving the gas purity stored above the gas-liquid separation device of the electrolytic hydrogen production equipment, reducing the presence of impurity gases, and achieving control of the gas purity and operating parameters in the future period of time within a certain limit range, thereby improving the accuracy of the adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 The logic block diagram of the dynamic simulation control method for gas washing of electrolytic hydrogen production of the present invention is shown;

[0031] Figure 2 The schematic structural diagram of the gas washing system for producing hydrogen by electrolysis of the present invention is shown.

[0032] The above drawings include the following reference numerals:

[0033] 10. Gas-liquid separation device; 20. Purification device; 30. Gas washing device; 40. First tube body; 50. Second tube body; 60. Third tube body; 70. Fourth tube body. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0037] In order to solve the problem that the safety risks caused by volatility in the process of hydrogen production by electrolysis in the prior art cannot be completely avoided, the present application provides a dynamic simulation control method for gas washing by electrolysis of hydrogen and a gas washing system for gas washing by electrolysis of hydrogen using the dynamic simulation control method for gas washing by electrolysis of hydrogen. Among them, the dynamic simulation control method for gas washing by electrolysis of hydrogen provided in this embodiment provides a control method for many-to-one electrolysis of hydrogen.

[0038] like Figure 1 As shown, a dynamic simulation control method for washing gas for hydrogen production by electrolysis includes:

[0039] Obtaining the initial gas purity inside the gas-liquid separation device 10 and the gas scrubber 30;

[0040] Perform a scrubbing operation, and obtain the first real-time gas purity inside the gas-liquid separation device 10 and the scrubber 30 at time tk during the scrubbing operation, the first circulating gas volume from the gas-liquid separation device 10 to the scrubber 30, and the first supplementary gas volume from the purification device 20 to the scrubber 30;

[0041] Obtaining the second real-time gas purity inside the gas-liquid separation device 10 and the gas scrubber 30 at time t during the gas scrubbing operation, the second circulating gas volume from the gas-liquid separation device 10 to the gas scrubber 30, and the second supplementary gas volume from the purification device 20 to the gas scrubber 30;

[0042] According to the changes in the first real-time gas purity and the second real-time gas purity, the first circulation gas volume and the second circulation gas volume, the first supplementary gas volume and the second supplementary gas volume in the time period from tk to t, the third real-time gas purity, the third circulation gas volume and the third supplementary gas volume in the time period from t to t+k in the gas washing operation are predicted and executed.

[0043] Among them, the detection of gas purity, the detection of circulating gas volume and the detection of gas replenishment volume can all be tested using corresponding sensors.

[0044] In this embodiment, the parameters of the gas purity, circulating gas volume and make-up gas volume at the current and previous moment are used as references to predict and set the gas purity, circulating gas volume and make-up gas volume in the future, which is beneficial to ensure the purification efficiency and the accuracy of regulation.

[0045] In this embodiment, the dynamic simulation operation of the gas washing of the present application adjusts the circulating gas volume and the gas replenishment volume in advance through simulation prediction, thereby achieving the purpose of improving purification efficiency and precision control. Specifically, by testing the gas purity over a period of time, the gas purity and the adjustment of the operating parameters in the future period of time are adjusted within a certain limit range, thereby improving the accuracy of the adjustment, thereby achieving the improvement of the concentration of the target gas inside the gas-liquid separation device 10, and improving the gas purity stored above the gas-liquid separation device 10 of the electrolytic hydrogen production equipment, thereby increasing the safety of the electrolytic hydrogen production gas washing system during the fluctuating operation process; at the same time, improving the gas purity stored above the gas-liquid separation device 10 of the electrolytic hydrogen production equipment, reducing the presence of impurity gases, and also achieving the control of the gas purity and the adjustment of the operating parameters in the future period of time within a certain limit range, thereby improving the accuracy of the adjustment.

[0046] Wherein, t in the present application is a certain moment, t is a constant and is greater than or equal to 1, for example, t can be 2, 3, 4, 5, etc., and the unit of t can be minutes or hours. k is a selected time period, k can be 1, 2, 3, 4, 5, etc., and the unit of k can be minutes or hours.

[0047] In this embodiment, the first circulation gas volume, the first air replenishment volume, the second circulation gas volume, the second air replenishment volume, the third circulation gas volume, and the third air replenishment volume are all controllable gas volumes during the gas washing process. The specific adjustment means can be controlled by valves, pump bodies and other structural parts.

[0048] In this embodiment, before obtaining the initial gas purity, the circulating gas volume from the gas-liquid separation device 10 to the scrubber 30 and the supplementary gas volume from the purification device 20 to the scrubber 30 are set to 0.

[0049] Specifically, by adjusting the circulating gas volume and the make-up volume to 0 and then adjusting, it is helpful to improve the accuracy of the adjustment, and it is also convenient to record and count data. By adjusting the circulating gas volume and the make-up volume to 0, it also avoids the problem that the circulating gas volume and the make-up volume may affect the numerical control collection.

[0050] The initial gas purity inside the gas-liquid separation device 10 and the scrubber 30 is obtained by:

[0051] Obtaining the concentration of the target gas in the top area of ​​the gas-liquid separation device 10;

[0052] Obtaining the concentration of the purified target gas pre-stored inside the scrubber 30;

[0053] The target gas is the concentration of hydrogen or oxygen.

[0054] The gas-liquid separation device 10 in the embodiment is connected to the electrolytic cell to collect hydrogen and oxygen.

[0055] Furthermore, the gas-liquid separation device 10 includes a first gas-liquid separator and a second gas-liquid separator which are independently arranged. The hydrogen generated by electrolysis in a plurality of electrolytic cells enters the first gas-liquid separator to perform gas-liquid separation, and then is purified and collected.

[0056] The oxygen generated by electrolysis in the multiple electrolytic cells enters the interior of the second gas-liquid separator for gas-liquid separation, and then is purified and collected.

[0057] The step of purifying and then collecting the target gas after gas-liquid separation includes: the target gas after gas-liquid separation is purified by the purification device 20 and then enters the interior of the collection device for storage.

[0058] Specifically, the mixed gas of hydrogen and oxygen output from the hydrogen output end of the electrolyzer is purified by the purification device 20, and the hydrogen is collected inside the hydrogen collecting device; the mixed gas of hydrogen and oxygen output from the hydrogen output end of the electrolyzer is purified by the purification device 20, and the hydrogen is collected inside the oxygen collecting device.

[0059] It can be understood that the gas-liquid separator and the purification device 20 in this embodiment are both devices that can be obtained on the market.

[0060] In this embodiment, the scrubbing operation includes a circulation phase and a displacement phase.

[0061] Specifically, the scrubbing operation includes the steps of:

[0062] A circulation phase is performed, in which the reserved purified target gas inside the scrubber 30 and the gas in the top area of ​​the gas-liquid separation device 10 form a gas circulation, thereby increasing the concentration of the target gas in the top area of ​​the gas-liquid separation device 10;

[0063] Detecting a first concentration of the target gas inside the scrubber 30, and stopping the scrubbing operation when the first concentration is greater than or equal to a preset concentration;

[0064] When the first concentration is less than the preset concentration, the replacement phase is started;

[0065] During the replacement stage, the purified target gas of the gas-liquid separation device 10 enters the interior of the scrubbing device 30. When the content of the target gas inside the scrubbing device 30 is a second concentration, the second concentration is greater than the preset concentration, and the replacement stage is stopped. The internal gas of the scrubbing device 30 circulates with the gas at the top of the gas-liquid separation device 10 to reach a third concentration of the target gas inside the scrubbing device 30. When the third concentration is greater than or equal to the preset concentration, the scrubbing operation is stopped. When the third concentration is less than the preset concentration, the replacement stage is started, and the above steps are repeated. When the concentration of the internal gas of the scrubbing device 30 is greater than or equal to the preset concentration, the scrubbing operation is stopped.

[0066] In a specific implementation of the present embodiment, when the oxygen concentration in the top area of ​​the first gas-liquid separator at the oxygen output end is less than or equal to 50% of the concentration of the purified gas, the system alarms and then starts to perform the scrubbing operation. The first scrubbing structure in the scrubbing device 30 that is connected to the first gas-liquid separator starts to form a gas circulation with the first gas-liquid separator to achieve a dynamic balance between the purified gas and the gas inside the first gas-liquid separator to increase the oxygen concentration inside the first gas-liquid separator. When the oxygen concentration inside the first scrubbing structure decreases to 80% of the concentration of the purified gas, the replacement stage is started. In the replacement stage, the purification device 20 introduces purified oxygen into the first scrubbing structure to increase the oxygen concentration inside the first scrubbing structure. When the oxygen concentration inside the first scrubbing structure reaches 90% of the purified oxygen concentration, the replacement stage is stopped and the circulation stage is continued. The oxygen concentration inside the first gas-liquid separator has been increased through gas circulation until the oxygen concentration inside the first gas-liquid separator reaches a preset concentration and then the scrubbing operation is stopped.

[0067] The first concentration is not greater than 80% of the concentration of the purified target gas; and the second concentration is greater than 90% of the concentration of the purified target gas.

[0068] In this embodiment, the preset concentration, the first concentration, the second concentration and the third concentration can all be adaptively set.

[0069] In this embodiment, the circulating gas volume and the purified gas replenishment volume are adjusted in advance through simulation and predictive control of the gas scrubbing dynamic process, so as to achieve the purpose of purity reduction and precise control.

[0070] Specifically:

[0071] Q S (t+1)=Q S (t)+ΔQ S (t);

[0072] Q p (t+1)=Q p (t)+ΔQ p (t).

[0073] Q S (t), Q p (t) is the circulating gas volume from the gas-liquid separator to the scrubber 30 and the supplementary gas volume from the purification device 20 to the scrubber 30 of the gas treatment system at time t.

[0074] ΔQ S (t), ΔQ p (t) is the S(t), Q p (t) solve the following optimization problem:

[0075] Min(hto s (t+1)+…+hto s (t+k)+hto w (t+1)+…+hto w (t+k)+Q S (t)+…+Q S (t+k-1)+Q p (t)+…+Q p (t+k-1)).

[0076] That is, from t to t+k, the overall purity of the electrolyzer is optimized (the sum of hydrogen in oxygen at each time is minimized), while the consumption demand for gas circulation and gas replenishment is minimized (the required power is minimized). K represents the selected time length.

[0077] Among them: hto s (t), hto w (t) is the gas purity of the gas-liquid separator and the scrubber 30 of the gas treatment system at time t.

[0078] hto s (t+1)=f1(Q s (t+1), Q p (t+1), Q s (t), Q p (t), hto s (t), hto w (t)),

[0079] hto w (t+1)=f2(Q s (t+1), Q p (t+1), Q s (t), Q p (t), hto s (t), hto w (t)).

[0080] f1, f2 are given by empirical fitting formulas.

[0081] As an example:

[0082] V s (hto s (t+1)-hto s (t))=-hto s (t-τ1)Q s (t)+hto w (t-τ2)(Qs (t)+Q p (t));

[0083] V w (hto w (t+1)-hto w (t))

[0084] =hto p (t)Q p (t)+hto s (t-τ1)Q s (t)-hto w (t-τ2)(Q s (t)+Q p (t)).

[0085] Wherein, VS, Vw are the volume of gas in the upper part of the gas-liquid separator and the volume of the gas scrubber 30 respectively; hto p (t) is the purity of the purified gas (hydrogen content in oxygen). τ1 and τ2 are fitting parameters obtained by fitting the experimental data.

[0086] This embodiment also provides a hydrogen electrolysis gas washing system, which uses the above-mentioned hydrogen electrolysis gas washing dynamic simulation control method.

[0087] Specifically, Figure 2 As shown, the electrolytic hydrogen production gas washing system includes a gas-liquid separation device 10, a purification device 20 and a gas washing device 30. The gas-liquid separation device 10 is respectively connected to the purification device 20 and supplies gas to the inside of the purification device 20. The collecting device is connected to the purification device 20 and is used to collect the purified gas. The gas washing device 30 has a first gas inlet, a second gas inlet and a gas outlet. The purification device 20 and the first gas inlet are connected and disconnected, the gas-liquid separation device 10 and the second gas inlet are connected and disconnected, and the gas-liquid separation device 10 and the gas outlet are connected and disconnected.

[0088] The oxygen output ends of the multiple electrolytic cells are connected to a gas-liquid separation device 10 for gas-liquid separation, and the hydrogen output ends of the multiple electrolytic cells are connected to another gas-liquid separation device 10 for gas-liquid separation.

[0089] Among them, electrolytic components are arranged inside the multiple electrolytic cells, and the electrolytic components are powered on to start electrolyzing the electrolyte solution to generate hydrogen and oxygen.

[0090] Furthermore, hydrogen and oxygen are produced after electrolysis in the electrolyte solution, and the liquid inside the corresponding gas-liquid separation device 10 flows to the liquid storage tank to form a circulation of liquid, which is beneficial to improving the gas production efficiency.

[0091] In this embodiment, the gas-liquid separation device 10 includes at least a first gas-liquid separator and a second gas-liquid separator, the hydrogen output ends of multiple electrolyzers are connected to the same first gas-liquid separator, the oxygen output ends of multiple electrolyzers are connected to the same second gas-liquid separator, and the liquid output ends of the first gas-liquid separator and the gas-liquid separator are connected to the liquid storage tank.

[0092] Among them, the first gas-liquid separator and the second gas-liquid separator can be gas-liquid separation towers.

[0093] In this embodiment, the purification device 20 includes a first purifier and a second purifier. The first purifier is connected to the gas output port of the first gas-liquid separator, and the second purifier is connected to the gas output port of the second gas-liquid separator. The structure of the first purifier and the second purifier is arranged to purify the mixture of hydrogen and hydrogen to produce pure hydrogen and pure oxygen.

[0094] The collecting device comprises a first collector and a second collector. The first purifier is connected to the first collector for supplying air to the first collector. The second purifier is connected to the second collector for supplying air to the second collector.

[0095] The scrubbing device 30 includes a first scrubbing structure and a second scrubbing structure. The first air inlet of the first scrubbing structure is connected to the first purifier, the second air inlet of the first scrubbing structure is connected to the first gas-liquid separator, the air outlet of the first scrubbing structure is connected to the first gas-liquid separator, and the first scrubbing structure and the first gas-liquid separator form a gas circulation.

[0096] The first air inlet of the second air washing structure is connected to the second purifier, the second air inlet of the second air washing structure is connected to the second gas-liquid separator, the air outlet of the second air washing structure is connected to the second gas-liquid separator, and the second air washing structure and the second gas-liquid separator form a gas circulation.

[0097] In this embodiment, the electrolytic hydrogen production and gas washing system also includes a pipe assembly and a pump assembly. The pipe assembly is used to realize the flow of gas and liquid, the pump assembly is used to provide power for the flow of gas and liquid, and the pump body group provides power for unidirectional flow to avoid the phenomenon of gas and liquid reflux.

[0098] Specifically, the tube assembly includes a first tube body 40, a second tube body 50, and a circulation tube body. The first tube body 40 is arranged between the gas-liquid separation device 10 and the purification device 20, the second tube body 50 is arranged between the purification device 20 and the scrubbing device 30, and the circulation tube body includes a third tube body 60 and a fourth tube body 70 arranged between the scrubbing device 30 and the gas-liquid separation device 10.

[0099] Specifically, the pump assembly includes a first pump body, a second pump body, and a third pump body. The first pump body is arranged on the second tube body 50 , the second pump body is arranged on the third tube body 60 , and the third pump body is arranged on the fourth tube body 70 .

[0100] Of course, the first tube body 40 , the second tube body 50 , the third tube body 60 and the fourth tube body 70 may all be provided with valve bodies, and the valve bodies are used to control the gas volume.

[0101] In this embodiment, the first pump body, the second pump body and the third pump body can all be variable frequency pumps. The electrolytic hydrogen production and gas washing system includes a controller, which is electrically connected to the electrolysis component, the pump component, the gas-liquid separation device 10, the purification device 20 and the gas washing device 30.

[0102] In this embodiment, the electrolytic hydrogen production and gas washing system further includes a plurality of heat exchangers, which are arranged at one end of the first tube body 40 connected to the electrolyzer, and the heat exchangers are arranged one by one with the electrolyzers. The heat exchanger is used to realize heat exchange operation through the internal heat exchange medium, and the heat exchanger adjusts the temperature of the output end of the electrolyzer, and the plurality of heat exchangers work independently, and the flow rate of the internal heat exchange medium of the corresponding heat exchanger is matched according to the operating power of each electrolyzer, so as to realize that the temperature difference between the inlet temperature of the plurality of electrolyzers and the gas output end is controlled within the preset temperature, so as to maintain the internal stability of the plurality of electrolyzers, which is conducive to improving the accuracy of gas control.

[0103] In this embodiment, the scrubber 30 includes a gas storage tank, and the gas pressure inside the gas storage tank is dynamically balanced with the gas pressure in the top area of ​​the gas-liquid separation device 10. The storage tank is a high-pressure storage tank, and the pre-stored gas inside the storage tank is purified gas.

[0104] The electrolytic hydrogen production scrubbing system further includes a gas concentration detector, which is respectively provided at the top area inside the scrubber 30, the second gas inlet of the scrubber 30, the gas outlet of the scrubber 30, and the top area inside the gas-liquid separator 10. The gas concentration detector is used to detect the concentration of the target gas inside the first scrubber structure and the second scrubber structure and inside the first gas-liquid separator and the second gas-liquid separator.

[0105] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0106] The dynamic simulation operation of the gas washing of the present application adjusts the circulating gas volume and the gas replenishment volume in advance through simulation prediction, thereby achieving the purpose of improving purification efficiency and precision control. Specifically, by testing the gas purity within a period of time, the gas purity and the adjustment of the operating parameters in the future period of time are adjusted within a certain limit range, thereby improving the accuracy of the adjustment, thereby achieving the improvement of the concentration of the target gas inside the gas-liquid separation device 10, and improving the gas purity stored above the gas-liquid separation device 10 of the electrolytic hydrogen production equipment, thereby increasing the safety of the electrolytic hydrogen production gas washing system during the fluctuating operation process; at the same time, improving the gas purity stored above the gas-liquid separation device 10 of the electrolytic hydrogen production equipment, reducing the presence of impurity gases, and also achieving the control of the gas purity and the adjustment of the operating parameters in the future period of time within a certain limit range, thereby improving the accuracy of the adjustment.

[0107] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0108] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0109] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dynamic simulation control method for gas washing in electrolytic hydrogen production, characterized in that: include: Obtaining the initial gas purity inside the gas-liquid separation device (10) and the gas scrubber (30); Performing a scrubbing operation, and obtaining a first real-time gas purity inside the gas-liquid separation device (10) and the scrubbing device (30), a first circulating gas volume from the gas-liquid separation device (10) to the scrubbing device (30), and a first supplementary gas volume from the purification device (20) to the scrubbing device (30) at time tk during the scrubbing operation; Obtaining a second real-time gas purity inside the gas-liquid separation device (10) and the gas scrubber (30) at time t during the gas scrubbing operation, a second circulating gas volume from the gas-liquid separation device (10) to the gas scrubber (30), and a second supplementary gas volume from the purification device (20) to the gas scrubber (30); According to the changes in the first real-time gas purity and the second real-time gas purity, the first circulating gas volume and the second circulating gas volume, the first make-up gas volume and the second make-up gas volume in the time period from tk to t, the third real-time gas purity, the third circulating gas volume and the third make-up gas volume in the time period from t to t+k in the gas washing operation are predicted and executed.

2. The dynamic simulation control method for gas washing for electrolytic hydrogen production according to claim 1, characterized in that: Before obtaining the initial gas purity, the circulating gas volume from the gas-liquid separation device (10) to the gas scrubber (30) and the supplementary gas volume from the purification device (20) to the gas scrubber (30) are set to 0.

3. The dynamic simulation control method for gas washing for electrolytic hydrogen production according to claim 1, characterized in that: The initial gas purity inside the gas-liquid separation device (10) and the gas scrubber (30) is obtained by: Obtaining the concentration of the target gas in the top area of ​​the gas-liquid separation device (10); Obtaining the concentration of the purified target gas pre-stored inside the gas scrubber (30); The target gas is the concentration of hydrogen or oxygen.

4. The dynamic simulation control method for gas washing for electrolytic hydrogen production according to claim 3 is characterized in that: The scrubbing operation includes a circulation phase and a displacement phase, and the scrubbing operation includes the steps of: executing the circulation stage, in which the reserved purified target gas inside the scrubber (30) and the gas in the top area of ​​the gas-liquid separation device (10) form a gas circulation, and the mixing degree of the gas in the top area of ​​the gas-liquid separation device (10) and the gas inside the scrubber (30) is controlled by controlling the circulating gas volume; detecting a first concentration of real-time gas inside the scrubbing device (30), and stopping the scrubbing operation when the first concentration is greater than or equal to a preset concentration; When the first concentration is less than the preset concentration, the replacement phase is started; In the replacement stage, the target gas purified by the purification device (20) enters the interior of the scrubbing device (30) with a preset gas supply volume. When the content of the target gas inside the scrubbing device (30) is a second concentration, the second concentration is greater than the preset concentration, and the replacement stage is stopped. The internal gas of the scrubbing device (30) and the gas at the top of the gas-liquid separation device (10) circulate at a preset circulation gas volume. The third concentration of the target gas inside the scrubbing device (30) is greater than or equal to the preset concentration. The scrubbing operation is stopped. When the third concentration is less than the preset concentration, the replacement stage is started. The above steps are repeated. When the concentration of the target gas inside the scrubbing device (30) is greater than or equal to the preset concentration, the scrubbing operation is stopped.

5. The dynamic simulation control method for gas washing for electrolytic hydrogen production according to claim 4 is characterized in that: The first concentration is no greater than 80% of the concentration of the purified target gas; The second concentration is greater than 90% of the concentration of the purified target gas.

6. An electrolytic hydrogen production gas washing system, characterized in that: The electrolytic hydrogen production scrubbing system uses the electrolytic hydrogen production scrubbing dynamic simulation control method according to any one of claims 1 to 5, and the electrolytic hydrogen production scrubbing system comprises: A gas-liquid separation device (10); A purification device (20), each of the gas-liquid separation devices (10) is connected to the purification device (20) and supplies gas to the inside of the purification device (20); The scrubber (30) comprises a first air inlet, a second air inlet and an air outlet, the purification device (20) is connectable with the first air inlet, the gas-liquid separation device (10) is connectable with the second air inlet, and the gas-liquid separation device (10) is connectable with the air outlet.

7. The electrolytic hydrogen production gas washing system according to claim 6, characterized in that: The electrolytic hydrogen production and gas washing system further comprises a pipe assembly, wherein the pipe assembly comprises: a first tube body (40), the first tube body (40) being arranged between the gas-liquid separation device (10) and the purification device (20); a second tube body (50), the second tube body (50) being arranged between the purification device (20) and the scrubbing device (30); A circulation pipe body, wherein the circulation pipe body comprises a third pipe body (60) and a fourth pipe body (70) arranged between the gas washing device (30) and the gas-liquid separation device (10).

8. The electrolytic hydrogen production gas washing system according to claim 7, characterized in that: The electrolytic hydrogen production and gas washing system further includes a pump assembly, which includes: A first pump body, the first pump body being arranged on the second tube body (50) and being used for adjusting the amount of air supply; a second pump body, the second pump body being arranged on the third pipe body (60) and being used for adjusting the circulating gas volume; A third pump body, the third pump body is arranged on the fourth pipe body (70) and is used for adjusting the circulating gas volume.

9. The electrolytic hydrogen production gas washing system according to claim 6, characterized in that: The gas scrubber (30) comprises a gas storage tank, and the gas pressure inside the gas storage tank is dynamically balanced with the gas pressure in the top area of ​​the gas-liquid separation device (10).

10. The electrolytic hydrogen production gas washing system according to claim 6, characterized in that: The electrolytic hydrogen production gas washing system also includes a gas concentration detector, which is respectively provided at the top area inside the gas washing device (30), the second gas inlet of the gas washing device (30), the gas outlet of the gas washing device (30) and the top area inside the gas-liquid separation device (10).

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