System for producing carbonated hydroalcoholic water from formic acid

Abstract

The application relates to the technical field of carbon-hydrogen water preparation, and provides a carbon-hydrogen water system for preparing formic acid, which comprises a cabinet body, a hydrogen preparation module, a hydrogen melting module and a control module, the hydrogen preparation module is arranged in the cabinet body, the hydrogen preparation module comprises a formic acid storage tank, a reaction kettle, a CO removal module, a cooling module and a gas-liquid separation module which are sequentially connected, the reaction kettle is used for generating hydrogen-rich gas through a catalytic cracking reaction with formic acid as raw material; the hydrogen melting module is arranged in the cabinet body and is connected with a hydrogen-rich gas outlet of the gas-liquid separation module through a gas pipeline, is used for mixing the hydrogen-rich gas after CO removal with water; the hydrogen-rich gas outlet of the gas-liquid separation module is in communication with an air inlet of the hydrogen melting module, CO2 in the hydrogen-rich gas enters the hydrogen melting module together with hydrogen and is dissolved in water, CO2 is dissolved in water to form carbonic acid to adjust the pH value of water. Based on this, integrated equipment can be integrated, carbon-hydrogen water can be directly prepared by using H2 and CO2 mixed gas, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of hydrocarbon water preparation technology, and specifically to a system for preparing hydrocarbon water from formic acid. Background Technology

[0002] Formic acid, as a liquid organic hydrogen carrier, possesses advantages such as high hydrogen storage density, stability at room temperature and pressure, and ease of transportation and storage, attracting widespread attention in the field of distributed hydrogen supply. Hydrogen-rich water, as a novel plant growth regulator, shows broad application prospects in agriculture, promoting seed germination, enhancing crop resistance, and improving agricultural product quality. Meanwhile, acidic water is of significant value for the cultivation of acid-loving crops such as blueberries and strawberries, and for regulating soil pH.

[0003] Integrated hydrogen production devices based on formic acid have been disclosed in related technologies. These devices separate hydrogen and carbon dioxide through distillation purification components or pressure swing adsorption systems to produce high-purity hydrogen, mainly for industrial hydrogen supply or fuel cell applications. Existing formic acid hydrogen production devices generally include a hydrogen purification module. The hydrogen-rich gas (mainly composed of H2 and CO2) produced by formic acid cracking must be purified before it can be used, while carbon dioxide is discharged as waste gas or a byproduct.

[0004] The aforementioned technical solutions are significantly out of sync with agricultural applications. On one hand, existing hydrogen production devices are built around a complex architecture encompassing hydrogen production, purification, storage, and supply, resulting in complex, costly, and bulky systems that limit their mobile deployment in agricultural settings such as greenhouses and sheds. On the other hand, existing devices all include hydrogen purification modules to separate H2 and CO2, lacking structural designs for the direct utilization of hydrogen-rich gases. This prevents the direct dissolution of a H2 and CO2 mixture in water to prepare water that combines hydrogen and carbon dioxide. While there are technical approaches to promoting crop growth through hydrogen-rich water irrigation and CO2 fertilization, these methods require separate processing of hydrogen and CO2, resulting in complex and costly systems.

[0005] Therefore, this application studies a system for preparing hydrocarbon water from formic acid, realizing integrated equipment, directly utilizing a mixture of H2 and CO2 to prepare hydrocarbon water, thereby reducing costs. Summary of the Invention

[0006] In order to achieve integrated equipment and directly utilize a mixture of H2 and CO2 to prepare hydrocarbon water, thereby reducing costs, this application provides a formic acid-based hydrocarbon water preparation system.

[0007] This application provides a system for preparing hydrocarbon water from formic acid, which adopts the following technical solution: A formic acid system for producing hydrocarbon water includes a cabinet, a hydrogen production module, a hydrogen melting module, and a control module. The hydrogen production module is located in the cabinet and includes a formic acid storage tank, a reaction vessel, a CO removal module, a cooling module, and a gas-liquid separation module connected in sequence. The reaction vessel is used to generate hydrogen-rich gas from formic acid through a catalytic cracking reaction. The hydrogen-rich gas contains hydrogen and carbon dioxide. The CO removal module is used to convert CO in the hydrogen-rich gas into CO2. The hydrogen melting module is installed inside the cabinet and connected to the hydrogen-rich gas outlet of the gas-liquid separation module via a gas pipeline, for mixing the CO-removed hydrogen-rich gas with water; the control module is installed inside the cabinet and connected to the hydrogen production module and the hydrogen melting module respectively, for controlling the operation of the hydrogen production module and the hydrogen melting module. The hydrogen-rich gas outlet of the gas-liquid separation module is connected to the gas inlet of the hydrogen melting module, so that CO2 in the hydrogen-rich gas enters the hydrogen melting module along with the hydrogen and dissolves in the water. The CO2 dissolves in the water to form carbonic acid to adjust the pH value of the water.

[0008] By adopting the above technical solution, the hydrogen production module, hydrogen melting module, and control module are integrated into the same cabinet, eliminating the need for a hydrogen purification module and its auxiliary equipment, reducing system volume, equipment cost, and operating energy consumption. Simultaneously, by utilizing the characteristic that CO2 from formic acid cracking products enters the hydrogen melting module along with H2 and dissolves in water to form carbonic acid, acidic hydrocarbon water can be prepared without the need for additional acidic substances. This effectively solves the problems of existing formic acid hydrogen production devices being complex, costly, and bulky due to the inclusion of a hydrogen purification module. It achieves integrated equipment, directly utilizing a mixture of H2 and CO2 to produce hydrocarbon water, thereby reducing costs.

[0009] Optionally, the CO removal module is a low-temperature water-gas shift reactor, which is filled with a copper-based catalyst and equipped with a heater to heat the hydrogen-rich gas to 180℃-240℃, so that CO and water vapor undergo a shift reaction to generate H2 and CO2 under the action of the catalyst.

[0010] By adopting the above technical solution, the CO removal module is set as a low-temperature water-gas shift reactor, and the reaction temperature is controlled at 180℃-240℃ using a copper-based catalyst and heater. Within this temperature range, CO and water are efficiently converted into CO2 and H2 under the action of the catalyst, reducing the CO content in hydrogen-rich gas to a safe level. This solves the safety problem that hydrogen-rich gas cannot be directly used for agricultural applications due to its CO content.

[0011] Optionally, the cooling module includes a heat exchange module and an air-cooled radiator; the heat exchange module is disposed between the outlet of the CO removal module and the inlet of the air-cooled radiator, and is used to exchange heat between the high-temperature hydrogen-rich gas after CO removal and the formic acid raw material, preheating the formic acid raw material while cooling the hydrogen-rich gas; the air-cooled radiator includes multiple stainless steel capillary tubes and aluminum fins connected to the outer wall of the stainless steel capillary tubes, and the air-cooled radiator is also equipped with a fan for air cooling the hydrogen-rich gas after it has been cooled by the heat exchange module.

[0012] By adopting the above technical solution, a heat exchange module is set up to allow high-temperature hydrogen-rich gas to exchange heat with formic acid raw materials. The waste heat from the reaction is used to preheat the raw materials, while the temperature of the hydrogen-rich gas is reduced. This achieves the cascade utilization of heat within the system, effectively reducing the heating energy consumption of the reactor and improving the overall energy efficiency of the system. The air-cooled radiator uses a stainless steel capillary tube and aluminum fin structure in conjunction with a fan for forced air cooling, ensuring that the hydrogen-rich gas is fully cooled to facilitate subsequent gas-liquid separation. This solves the problems of ineffective utilization of waste heat from the reaction and high system energy consumption in existing technologies.

[0013] Optionally, the gas-liquid separation module includes a return liquid tank and a gas-water separator. The return liquid tank is equipped with a flow divider for coarse separation of hydrogen-rich gas. The gas-water separator is used for fine gas-liquid separation of the coarsely separated hydrogen-rich gas. The drain outlet of the return liquid tank is connected to an adsorption tank. The adsorption tank is filled with packing material for neutralizing the acidity of the condensate. The condensate is discharged after being neutralized by the adsorption tank.

[0014] By adopting the above technical solution, hydrogen-rich gas is separated into two stages through a return liquid tank and a gas-liquid separator. First, the gas is coarsely separated by a flow divider in the return liquid tank, and then finely separated by the gas-liquid separator, thus achieving complete removal of liquid water from the gas. At the same time, the acidic condensate discharged from the return liquid tank is neutralized by an adsorption tank before being discharged. This solves the problems of incomplete gas-liquid separation in existing technologies, which leads to water ingress into subsequent equipment and direct discharge of condensate causing environmental pollution. This improves the reliability and environmental friendliness of the system.

[0015] Optionally, the hydrogen melting module includes a melting tank and a concentration sensor. The melting tank is provided with a water inlet, a melting water gas inlet and a hydrocarbon water outlet. The melting water gas inlet is connected to the hydrogen-rich gas outlet of the gas-liquid separation module. The melting tank is used to mix hydrogen-rich gas after CO removal with water, and to dissolve the hydrogen-rich gas into micro-nano bubbles through cutting and cavitation processes. The concentration sensor is installed on the pipeline at the outlet of the hydrocarbon water and is used to detect the hydrogen concentration of the hydrocarbon water in real time and feed it back to the control module.

[0016] By adopting the above technical solution, a melting tank is set up to receive hydrogen-rich gas and mix it with water. The hydrogen-rich gas is broken into micro-nano bubbles by cutting and cavitation processes and then dissolved in water, which greatly improves the dissolution efficiency and stability of the gas in water. The concentration of hydrogen in the hydrocarbon water is detected in real time by a concentration sensor and fed back to the control module, realizing automatic monitoring of the concentration of hydrocarbon water.

[0017] Optionally, the melting tank is equipped with a one-way valve at the melting water inlet, and the melting tank is equipped with an exhaust valve and a pressure gauge at the top.

[0018] By adopting the above technical solution, a one-way valve is installed on the gas inlet pipe of the melting water tank to prevent water in the melting water tank from flowing back to the hydrogen production module when the system stops or the pressure fluctuates, thus avoiding damage to the pipeline and equipment; an exhaust valve and pressure gauge are installed on the top of the melting water tank to ensure that the pressure inside the tank does not exceed the limit.

[0019] Optionally, the hydrogen production module further includes a gas distribution module connected between the gas-liquid separation module and the hydrogen melting module. The gas distribution module includes a three-way valve assembly with a first outlet and a second outlet. The first outlet is connected to the hydrogen melting module, and the second outlet is connected to the external atmosphere of the cabinet. The control module controls the three-way valve assembly to guide the hydrogen-rich gas to the first outlet during normal system operation and to guide the hydrogen-rich gas to the second outlet for discharge during system shutdown or emergency situations.

[0020] By adopting the above technical solution and setting up a gas distribution module, a three-way valve assembly is used to guide hydrogen-rich gas to the hydrogen melting module during normal operation and to discharge it to the outside atmosphere of the cabinet during shutdown or emergency situations. This achieves gas flow direction switching control under different operating conditions, improving the safety and controllability of system operation.

[0021] Optionally, the cabinet has an internal isolation structure that separates the hydrogen production module and the hydrogen melting module into different cavities. The isolation structure is a metal partition, which is sealed to the inner wall of the cabinet. The metal partition has perforations for pipes and cables to pass through, and sealing joints are provided at the perforations.

[0022] By adopting the above technical solution, the hydrogen production module and the hydrogen melting module are separated into different chambers by setting a metal partition inside the cabinet, and a sealing joint is set at the perforation, which effectively isolates water, gas and electricity, improves system stability and safety, and enhances the long-term reliability of the system.

[0023] Optionally, the cavity containing the hydrogen production module is equipped with a combustible gas detection probe, an exhaust fan, and an audible and visual alarm. The combustible gas detection probe, the exhaust fan, and the audible and visual alarm are respectively connected to the control module via signals. When the detection value of the combustible gas detection probe exceeds a set threshold, the control module first cuts off the formic acid feed and then starts the exhaust fan.

[0024] By adopting the above technical solution, a combustible gas detection probe, an exhaust fan, and an audible and visual alarm are installed in the cavity where the hydrogen production module is located. When the hydrogen concentration exceeds the limit, the control module first cuts off the formic acid feed and then starts the exhaust fan, forming a linkage and interlocking control mechanism for detection, feed cut-off, and ventilation. This solves the problem of the lack of effective safety handling measures in the case of hydrogen leakage in the hydrogen production system and improves the inherent safety level of the system.

[0025] Optionally, the formic acid storage tank is equipped with a breather, a filling port, and a second liquid level sensor. The breather is connected to the external atmosphere of the cabinet to balance the internal pressure of the formic acid storage tank. The second liquid level sensor is installed at the bottom of the formic acid storage tank to monitor the liquid level in the formic acid storage tank in real time and feed it back to the control module. The control module controls the liquid supply pump to replenish formic acid into the formic acid storage tank according to the signal from the second liquid level sensor.

[0026] By adopting the above technical solution, the pressure balance inside the formic acid storage tank is maintained by setting a vent on the formic acid storage tank, and the liquid level is monitored in real time by a liquid level sensor and fed back to the control module. This realizes the automatic replenishment of formic acid raw materials, solves the problem of system operation interruption caused by pressure imbalance or raw material depletion in the formic acid storage tank, and ensures the continuous and stable operation of the system.

[0027] In summary, this application includes the following beneficial technical effects: 1. By integrating the hydrogen production module, hydrogen melting module, and control module into the same cabinet, the hydrogen purification module and its auxiliary equipment are eliminated, reducing the system volume and lowering equipment costs and operating energy consumption. At the same time, by utilizing the characteristic that CO2 from formic acid cracking products enters the hydrogen melting module along with H2 and dissolves in water to form carbonic acid, acidic hydrocarbon water can be prepared without the need to add additional acidic substances. This effectively solves the problems of complex systems, high costs, and large volumes caused by the inclusion of hydrogen purification modules in existing formic acid hydrogen production devices. It achieves integrated equipment and directly uses the mixture of H2 and CO2 to produce hydrocarbon water, thereby reducing costs. 2. By setting the CO removal module as a low-temperature water-gas shift reactor and using a copper-based catalyst and heater to control the reaction temperature at 180℃-240℃, CO and water are efficiently converted into CO2 and H2 under the action of the catalyst within this temperature range, reducing the CO content in hydrogen-rich gas to a safe level and solving the safety problem that hydrogen-rich gas cannot be directly used for agricultural applications due to its CO content. 3. By setting up a heat exchange module, high-temperature hydrogen-rich gas exchanges heat with formic acid raw materials, utilizing the waste heat of the reaction to preheat the raw materials and simultaneously reduce the temperature of the hydrogen-rich gas. This achieves tiered utilization of heat within the system, effectively reducing the heating energy consumption of the reactor and improving the overall energy efficiency of the system. The air-cooled radiator adopts a stainless steel capillary tube and aluminum fin structure in conjunction with a fan for forced air cooling, ensuring that the hydrogen-rich gas is fully cooled to facilitate subsequent gas-liquid separation. This solves the problems of ineffective utilization of waste heat and high system energy consumption in existing technologies. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a system diagram of the formic acid preparation hydrocarbon water system according to an embodiment of this application; Figure 2 This is a schematic diagram of the module connections of the formic acid-to-hydrogen water system according to an embodiment of this application; Figure 3 This is a top view of the cabinet arrangement in the formic acid to hydrocarbon water preparation system of this application embodiment; Figure 4 This is a schematic diagram illustrating the structure of the hydrogen production module in the formic acid to hydrocarbon water production system of this application embodiment; Figure 5 This is a schematic diagram of the hydrogen melting module in the formic acid to hydrocarbon water preparation system of this application embodiment; Figure 6 This is a cross-sectional schematic diagram illustrating the hydrogen production module in the formic acid to hydrocarbon water production system of the embodiments of this application; Figure 7 This is a schematic diagram illustrating the gas-liquid separation module in the formic acid to hydrocarbon water preparation system of this application embodiment; Figure 8 This is a schematic diagram illustrating the structure of the gas distribution module in the formic acid to hydrocarbon water preparation system of this application embodiment; Figure 9 This is a schematic diagram of the formic acid storage tank in the formic acid to hydrocarbon water preparation system of this application embodiment.

[0030] Attached reference numerals: 01, Hydrogen production chamber; 02, Hydrogen melting chamber; 03, Control chamber; 14, Pressure gauge; 15, Exhaust valve; 16, Melting water tank; 17, Inlet; 18, Hydrocarbon water outlet; 21, Raw material tank; 22, Sliding block; 24, Melting water pump; 25, Melting water pump inlet; 26, Liquid supply pump; 27, Tray; 41, Formic acid storage tank; 42, Formic acid conveying module; 43, Reactor; 44, CO removal module; 45, Heat exchange module; 46, Air... 47. Cooling Radiator; 48. Gas-Liquid Separation Module; 79. Gas Distribution Module; 70. Buffer Tank; 71. Return Tank; 72. Adsorption Tank; 101. Raw Material Supply System; 116. Meltwater Inlet; 117. One-Way Valve; 231. Guide Rail; 232. Base; 235. Quick-Connect Connector; 411. Breathing Port; 412. Liquid Filling Port; 413. Formic Acid Storage Tank Interface; 414. Second Liquid Level Sensor; 415. Formic Acid Solution Outlet; 420. Conveying Ball Valve; 421. Raw material pump; 422. Pressure sensor; 430. Third liquid level sensor; 431. Temperature sensor; 432. Pressure transmitter; 433. Safety relief valve; 434. Reactor inlet; 435. Reactor hydrogen outlet; 437. Heating rod; 441. CO removal module interface; 442. CO removal module inlet; 443. On / off solenoid valve; 451. Plate heat exchanger; 452. Three-way electric valve; 470. Gas-liquid separator; 4 71. Separating ball valve; 472. Drain valve; 473. T-connector; 474. Detection port needle valve; 475. Third solenoid valve; 476. Control valve; 477. Rotor flow meter; 478. Fourth solenoid valve; 479. Exhaust port needle valve; 480. First liquid level sensor; 484. First solenoid valve; 489. Second solenoid valve; 603. Combustible gas detection probe; 604. Exhaust fan; 605. Smoke sensor; 606. Audible and visual alarm. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0032] This application discloses a system for preparing hydrocarbon water from formic acid. (Refer to...) Figures 1-9 The formic acid-to-hydrogen water production system includes a cabinet, a hydrogen production module, a hydrogen melting module, and a control module. The hydrogen production module is housed within the cabinet. The cabinet employs a compartmentalized design, featuring a front door, a rear door, and a side door. The cabinet's internal space is divided by longitudinal panels and multiple transverse panels. Within the cabinet, arranged horizontally from back to front, are a hydrogen production chamber 01, a hydrogen melting chamber 02, and a control chamber 03. The hydrogen production chamber 01 houses the hydrogen production module, the hydrogen melting chamber 02 houses the hydrogen melting module, and the control chamber 03 houses the control module. The control module controls the various sensors and electrical components within the hydrogen production chamber 01 and the hydrogen melting chamber 02 via signal or communication lines.

[0033] Reference Figure 1 , Figure 2 and Figure 4 The hydrogen production module includes a formic acid storage tank 41, a reaction vessel 43, a CO removal module 44, a cooling module, and a gas-liquid separation module 47 connected in sequence. The reaction vessel 43 is used to generate hydrogen-rich gas through catalytic cracking reaction of formic acid as raw material. The hydrogen-rich gas contains hydrogen and carbon dioxide. The CO removal module 44 is used to convert CO in the hydrogen-rich gas into CO2.

[0034] The formic acid delivery module 42 includes a delivery ball valve 420, a raw material pump 421, a pressure sensor 422, and stainless steel pipelines connected in series, used to deliver formic acid raw material from the formic acid storage tank 41 to the reaction vessel 43. A pressure sensor 422 is installed at the outlet end of the raw material pump 421 to detect the internal pressure of the system.

[0035] The hydrogen melting module is located inside the cabinet and is connected to the hydrogen-rich gas outlet of the gas-liquid separation module 47 via a gas pipeline. It is used to mix the hydrogen-rich gas after CO removal with water. The control module is located inside the cabinet and is connected to the hydrogen production module and the hydrogen melting module via signals. It is used to control the operation of the hydrogen production module and the hydrogen melting module.

[0036] Formic acid storage tank 41 is used to store formic acid raw material. Reactor 43 uses formic acid as raw material and generates hydrogen-rich gas through catalytic cracking reaction. Formic acid is cracked into hydrogen, carbon dioxide, and trace amounts of carbon monoxide under the action of a catalyst. A CO removal module 44 is installed at the rear end of reactor 43. The CO removal module 44 is used to convert carbon monoxide in hydrogen-rich gas into carbon dioxide. After passing through CO removal module 44, cooling module, and gas-liquid separation module 47 from reactor 43, the hydrogen-rich gas directly enters the hydrogen melting module through a metal pipe and intermediate partition. The entire process does not require any hydrogen purification treatment such as pressure swing adsorption or membrane separation, reducing equipment costs.

[0037] The hydrogen-rich gas outlet of the gas-liquid separation module 47 is connected to the gas inlet of the hydrogen melting module, allowing CO2 in the hydrogen-rich gas to enter the hydrogen melting module along with the hydrogen and dissolve in water. The CO2 dissolves in the water to form carbonic acid, which adjusts the pH value of the water. The hydrogen melting module utilizes the carbon dioxide in the hydrogen-rich gas to dissolve in water to form carbonic acid, thereby adjusting the pH value of the water and preparing acidic hydrocarbon water. A buffer tank 70 is also provided, which is installed on the pipeline between the reaction vessel 43 and the hydrogen melting module to stabilize the hydrogen pressure and achieve a safe, reliable, and stable continuous supply of hydrogen.

[0038] Reference Figure 1 , Figure 2 and Figure 6In some embodiments, the CO removal module 44 is a low-temperature water vapor shift reactor, which is filled with a copper-based catalyst and equipped with a heater to heat the hydrogen-rich gas to 180℃-240℃, so that CO and water vapor undergo a shift reaction under the action of the catalyst to generate H2 and CO2.

[0039] Specifically, the hydrogen outlet 435 of the reactor is connected to the inlet 442 of the CO removal module. Since the hydrogen-rich gas contains carbon monoxide, this technical solution adds a CO removal module 44 to ensure its safe application in agriculture. This module uses a low-temperature water-vapor shift reaction to convert carbon monoxide in the hydrogen-rich gas into carbon dioxide, thus achieving carbon monoxide removal. The CO removal module 44 is equipped with a heater. After entering the module, the gas is first heated to between 180℃ and 240℃ before entering the CO removal reactor. The CO reactor is filled with a copper-based catalyst. Under the action of the catalyst, carbon monoxide and water vapor undergo a shift reaction, converting carbon monoxide into carbon dioxide, thus completing the removal of carbon monoxide. The reaction equation is as follows:

[0040] A pressure transmitter 432 is installed on the surface of the reactor 43. The main function of the pressure transmitter 432 is to monitor the pressure in the reactor 43 chamber and maintain the stable and safe operation of the system. A third liquid level sensor 430 is installed inside the reactor 43 to monitor the catalyst liquid level and volume in real time. Heating rods 437 are installed on the inner wall and bottom of the reactor 43. During operation, the control module reads the value of the temperature sensor 431 in real time to monitor the liquid temperature of the catalyst. Based on the current temperature, the control module adjusts the output power of the heating rods 437 to achieve precise temperature control. To ensure the safe operation of the system, a safety relief valve 433 is installed inside the reactor 43. When the pressure exceeds the safety threshold, the safety relief valve 433 opens to discharge the overpressure gas from the equipment, ensuring the safe operation of the system.

[0041] In another embodiment, the CO removal module 44 may also be an adsorption-type CO removal unit filled with a molecular sieve adsorbent that selectively adsorbs carbon monoxide, removing carbon monoxide from hydrogen-rich gas through temperature swing adsorption or pressure swing adsorption. This adsorption-type CO removal unit can employ a two-tower or three-tower parallel structure to achieve cyclic switching between adsorption and regeneration, enabling the system to operate continuously without interruption.

[0042] In another embodiment, the CO removal module 44 may also employ a selective catalytic oxidation unit, which is filled with an oxidation catalyst and equipped with an oxygen injection device or an air blowing device to selectively oxidize carbon monoxide to carbon dioxide at 120°C-180°C.

[0043] Reference Figure 1 , Figure 2, Figure 4 and Figure 6 In some embodiments, the cooling module includes a heat exchange module 45 and an air-cooled radiator 46. The heat exchange module 45 is disposed between the outlet of the CO removal module 44 and the inlet of the air-cooled radiator 46, and is used to exchange heat between the high-temperature hydrogen-rich gas after CO removal and the formic acid raw material, preheating the formic acid raw material while cooling the hydrogen-rich gas. The air-cooled radiator 46 includes multiple stainless steel capillary tubes and aluminum fins connected to the outer wall of the stainless steel capillary tubes. The air-cooled radiator 46 is also equipped with a fan for air cooling the hydrogen-rich gas after it has been cooled by the heat exchange module 45.

[0044] Specifically, the heat exchange module 45 includes a three-way electric valve 452 and a plate heat exchanger 451. Hydrogen-rich gas exits from the CO removal module interface 441 and enters the inlet of the connected plate heat exchanger 451, where it exchanges heat with room-temperature formic acid. The room-temperature formic acid, after being heated by the plate heat exchanger 451, enters the reaction vessel 43, thus recovering and utilizing the waste heat from the reaction. The temperature of the hydrogen-rich gas is reduced to below 80°C.

[0045] The three-way electric valve 452 has one inlet and two outlets. Its inlet is connected to the outlet of the plate heat exchanger 451. The outlets include outlet one and outlet two. Outlet one is connected to the inlet 434 of the reactor, and outlet two is connected to the interface 413 of the formic acid storage tank. It is used to control the flow direction of the formic acid raw material.

[0046] The cooled hydrogen-rich gas flows from the outlet of the plate heat exchanger 451 to the air-cooled radiator 46. A stainless steel pipe connects the outlet of the plate heat exchanger 451 to the inlet of the air-cooled radiator 46, and an on / off solenoid valve 443 is installed on the pipe. The outlet of the plate heat exchanger 451 is first connected to the on / off solenoid valve 443, and the other port of the on / off solenoid valve 443 is connected to the inlet of the air-cooled radiator 46. The air-cooled radiator 46 is used to force-cool the hydrogen-rich gas after it has been cooled by the heat exchange module 45. The air-cooled radiator 46 has multiple stainless steel capillary tubes inside, and aluminum fins are welded to the outer wall of the capillary tubes. When the air-cooled radiator 46 is working, a fan forces air convection for heat exchange.

[0047] After high-temperature decarbonization, the hydrogen-rich gas undergoes a first-stage cooling process, from 180℃-240℃ to 60℃-80℃, and then a second-stage cooling process via an air-cooled radiator 46, reducing the temperature to 10℃-38℃.

[0048] In another embodiment, the cooling module may also use water cooling heat exchange to cool the high-temperature hydrogen-rich gas.

[0049] Reference Figure 1 , Figure 2 and Figure 7In some embodiments, the gas-liquid separation module 47 includes a return liquid tank 71 and a gas-liquid separator 470. The return liquid tank 71 is equipped with a flow divider for coarse separation of hydrogen-rich gas. The gas-liquid separator 470 is used for fine gas-liquid separation of the coarsely separated hydrogen-rich gas. The drain outlet of the return liquid tank 71 is connected to an adsorption tank 72. The adsorption tank 72 is filled with packing material for neutralizing the acidity of the condensate. The condensate is discharged after being neutralized by the adsorption tank 72.

[0050] The air outlet of the air-cooled radiator 46 is connected to the air inlet of the return liquid tank 71. The return liquid tank 71 has a flow divider inside. Gas entering the return liquid tank 71 changes direction under the action of the flow divider, distributing evenly across the cross-section of the return liquid tank 71. Since the gas temperature is below 38℃, the vaporized water becomes liquid water. When the gas and liquid water enter the return liquid tank 71, due to the density difference between the gas and liquid, the flow divider changes the gas flow direction, prolonging the gas-liquid contact time. The liquid water settles downwards under gravity, while the gas flows upwards, thus achieving efficient gas-liquid separation and completing the coarse separation of hydrogen-rich gas.

[0051] The function of the return tank 71 is twofold: first, to wash the gas, mainly by washing and filtering the impurities contained in the hydrogen-rich gas, and removing residual gaseous formic acid from the gas; second, to separate the gas and water by utilizing factors such as the gravity of water, the density difference between gas and water, flow rate, and flow direction.

[0052] After coarse separation, the hydrogen-rich gas enters the gas-water separator 470, where micron and nano-sized water vapor in the gas is finely separated to achieve thorough drying of the gas and reduce the gas dew point to below -40°C.

[0053] A first liquid level sensor 480 is installed on the side of the return tank 71, which can monitor the water depth in the return tank 71 in real time. A first solenoid valve 484 is installed on the connecting pipe between the drain outlet of the return tank 71 and the adsorption tank 72. The adsorption tank 72 is filled with packing material that can neutralize the acidity of formic acid, adjusting the slightly acidic condensate to neutral through physical adsorption or chemical reaction before discharge, ensuring the system is environmentally friendly and safe. The drain outlet of the adsorption tank 72 is connected to a second solenoid valve 489. When the condensate level reaches the set height, it passes through the first solenoid valve 484, the adsorption tank 72, and the second solenoid valve 489 in sequence, and is discharged outside the casing after harmless treatment, which is clean, environmentally friendly, and pollution-free.

[0054] In another embodiment, the liquid level sensor of the return tank 71 can also be a magnetic float level gauge to monitor the liquid level height.

[0055] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5In some embodiments, the hydrogen melting module includes a melting tank 16 and a concentration sensor. The melting tank 16 is provided with a water inlet 17, a melting water air inlet 116, and a hydrocarbon water outlet 18. The melting water air inlet 116 is connected to the hydrogen-rich gas outlet of the gas-liquid separation module 47. The melting tank 16 is used to mix the hydrogen-rich gas after CO removal with water, and dissolve the hydrogen-rich gas in water after forming micro-nano bubbles through cutting and cavitation processes. The concentration sensor is located on the pipeline of the hydrocarbon water outlet 18 and is used to detect the hydrogen concentration of the hydrocarbon water in real time and feed it back to the control module.

[0056] Specifically, after passing through the gas distribution module 48, the hydrogen-rich gas passes through a metal pipe through the intermediate partition and is connected to the one-way valve 117 on the melting tank 16, while the water inlet 17 receives and treats irrigation water.

[0057] The hydrogen melting module also includes a melting water pump 24, which is located inside the hydrogen melting chamber 02. The melting water pump inlet 25 is connected to an external water source, and the outlet is connected to the inlet 17 of the melting water tank 16, for pumping external water into the melting water tank 16.

[0058] The melting tank 16 is used to mix hydrogen-rich gas (after CO removal) with water, and to dissolve the hydrogen-rich gas into micro-nano bubbles through cutting and cavitation processes. Specifically, after the hydrogen-rich gas and water are initially mixed in the melting tank 16, the hydrogen-rich gas is continuously or intermittently broken into micro-nano bubbles through cutting and cavitation processes under a certain pressure, and then dissolved in water to form hydrocarbon water. After rotary cutting, the hydrogen-rich gas can be broken down to 100-300 nm. The dissolution pressure is 0.1-0.3 Bar.

[0059] A hydrocarbon water concentration sensor is installed on the outlet pipe of the melting tank 16. This sensor monitors the hydrocarbon water concentration in real time and feeds the data back to the control module. The control module performs intelligent calculations based on the required concentration and the current data to determine whether the current hydrocarbon water concentration meets the requirements and how long it will take to produce hydrogen to meet the application needs of the hydrocarbon water, thus achieving automatic preparation of hydrocarbon water. The prepared hydrocarbon water is then transported from the outlet of the melting tank 16 to the application end.

[0060] Reference Figure 5 In some embodiments, the melting tank 16 is provided with a one-way valve 117 on the melting water inlet 116, and the top of the melting tank 16 is provided with an exhaust valve 15 and a pressure gauge 14.

[0061] The function of the one-way valve 117 is to prevent water from flowing backward through the pipeline to the gas distribution module 48, and to prevent the melting tank 16 from operating under overpressure through pressure control.

[0062] Reference Figure 1 , Figure 2 and Figure 8In some embodiments, the hydrogen production module is further provided with a gas distribution module 48, which is connected between the gas-liquid separation module 47 and the hydrogen melting module. The gas distribution module 48 includes a three-way valve assembly, which has a first outlet and a second outlet. The first outlet is connected to the hydrogen melting module, and the second outlet is connected to the external atmosphere of the cabinet. The control module controls the three-way valve assembly to guide the hydrogen-rich gas to the first outlet when the system is running normally, and to guide the hydrogen-rich gas to the second outlet for discharge when the system is shut down or in an emergency.

[0063] The gas distribution module 48 also includes a gas-liquid separator 470, a regulating valve 476, a rotor flow meter 477, and a drain valve 472. The three-way valve assembly includes a three-way connector 473, a third solenoid valve 475, and a fourth solenoid valve 478. The gas-liquid separator 470 is connected to the gas outlet of the upstream return tank 71 via a metal pipe.

[0064] The finely separated hydrogen-rich gas connects to a three-way connector 473 at the outlet of the gas-water separator 470. The three-way connector 473 acts as a reversing valve, providing one fluid inlet and two fluid outlets. The first outlet of the three-way connector 473 connects to a third solenoid valve 475, and the outlet of the third solenoid valve 475 connects to a regulating valve 476. Adjusting the opening of the regulating valve 476 controls the gas output flow rate. The outlet of the regulating valve 476 connects to the inlet of a rotor flowmeter 477, and the hydrogen-rich gas flows through the outlet of the rotor flowmeter 477 to the one-way valve 117 on the melting tank 16. This is the first outlet of the three-way valve assembly, connected to the hydrogen melting module.

[0065] The second port of the three-way connector 473 is connected to the fourth solenoid valve 478. The outlet of the fourth solenoid valve 478 is connected to the exhaust needle valve 479. The outlet of the exhaust needle valve 479 is connected to the outside of the equipment housing through a pipe, allowing hydrogen-rich gas to be discharged from the equipment. This is the second outlet of the three-way valve assembly, which is open to the outside atmosphere of the cabinet.

[0066] The control module controls the three-way valve assembly to direct hydrogen-rich gas to the first outlet (the third solenoid valve 475 is open and the fourth solenoid valve 478 is closed) during normal system operation. After the hydrocarbon water irrigation is completed or in the event of system shutdown or emergency, the raw material pump 421 stops feeding liquid, the fourth solenoid valve 478 is opened, the third solenoid valve 475 is closed, and the hydrogen-rich gas is no longer directed to the melting tank 16, but is instead directed to the second outlet for discharge.

[0067] A detection port needle valve 474 is connected in parallel between the three-way connector 473 and the third solenoid valve 475. The outlet of the detection port needle valve 474 serves as a gas quality detection port for sampling and detecting the hydrogen-rich gas components.

[0068] The drain port of the steam-water separator 470 is connected to the separation ball valve 471. The rear end of the separation ball valve 471 is connected to the steam trap 472. The function of the steam trap 472 is to automatically drain water without venting air. The outlet pipe of the steam trap 472 is directly connected to the bottom of the equipment.

[0069] In some embodiments, the cabinet has an internal isolation structure that separates the hydrogen production module and the hydrogen melting module into different cavities. The isolation structure is a metal partition, which is sealed to the inner wall of the cabinet. The metal partition has perforations for pipes and cables to pass through, and sealing joints are provided at the perforations.

[0070] The isolation structure separates the hydrogen production module and the hydrogen melting module into different chambers. A 2mm thick metal partition is installed between the hydrogen production chamber 01 and the hydrogen melting chamber 02. A reinforcing beam is installed in the middle of the partition, and the partition is sealed to the casing around its perimeter, isolating the gas in the hydrogen production chamber 01 from the gas in the hydrogen melting chamber 02. Sealing joints include through-plate compression fittings for gas and liquid pipelines, and cable sealing joints for cables. The through-plate compression fittings are sealed to the metal partition using sealing gaskets and lock nuts. The pipeline ends are sealed to the through-plate compression fittings via compression fittings, ensuring no leakage of gas or liquid as it passes through the partition. The cable sealing joints employ a stuffing box structure or a rubber sealing ring structure. After the cable passes through the cable sealing joint, the sealing ring is compressed by tightening the nut to achieve a seal with the partition.

[0071] Effective isolation of gas, water, and electrical components ensures system stability and reliability. The aforementioned sealed joint structure ensures that gas pipelines, liquid pipelines, and cables are independently sealed and do not interfere with each other when passing through the metal partition. This also prevents hydrogen and other gases in the hydrogen production chamber 01 from leaking into the molten hydrogen chamber 02 through the perforations, and also prevents water in the molten hydrogen chamber 02 from seeping into the hydrogen production chamber 01 through the perforations.

[0072] Reference 1 and Figure 4 In some embodiments, a combustible gas detection probe 603, an exhaust fan 604, and an audible and visual alarm 606 are provided at the top of the cavity where the hydrogen production module is located. The combustible gas detection probe 603, the exhaust fan 604, and the audible and visual alarm 606 are respectively connected to the control module via signals. When the detection value of the combustible gas detection probe 603 exceeds a set threshold, the control module first cuts off the formic acid feed and then starts the exhaust fan 604.

[0073] The hydrogen melting chamber 02 is also designed with an exhaust fan 604 and a combustible gas detection probe 603. Two exhaust fans 604 are installed on the top side of the control chamber 03. The combustible gas detection probe 603, exhaust fans 604, audible and visual alarm 606, and smoke sensor 605 are respectively connected to the control module for signal transmission.

[0074] The control module has a built-in hydrogen leak linkage control program, which adopts a graded alarm and linkage response mechanism.

[0075] The control module first determines whether the hydrogen concentration detected by the combustible gas detection probe 603 is between 1000 PPM and 5000 PPM. If so, it executes an intermediate alarm procedure: triggering the audible and visual alarm 606 to issue an audible and visual warning signal, and starting the exhaust fan 604 for forced ventilation. During this process, the system maintains continuous monitoring. When the hydrogen concentration drops below 500 PPM, the control module automatically shuts off the exhaust fan 604, turns off the audible and visual alarm 606, and the system returns to normal operation.

[0076] If the hydrogen concentration is not between 1000 PPM and 5000 PPM, the control module further determines whether the hydrogen concentration exceeds 5000 PPM. If so, an advanced alarm and emergency shutdown procedure is executed: the raw material pump 421 and the corresponding feed valve in the formic acid delivery module 42 are immediately shut down to cut off the formic acid raw material supply; simultaneously, the inert gas release device is activated to inject inert gas into the cavity for replacement, reducing the hydrogen concentration; the exhaust fan 604 is started for forced ventilation to expel the leaked hydrogen gas outside the cabinet, preventing hydrogen from forming an explosive mixture with air. The system performs an emergency shutdown operation.

[0077] If the hydrogen concentration is neither between 1000 PPM and 5000 PPM nor exceeds 5000 PPM, and the concentration is below 500 PPM, the system is in a safe state and no alarm or interlock action is triggered. The exhaust fan 604 and the audible and visual alarm 606 remain off, and the system continues to operate normally.

[0078] The aforementioned hierarchical interlocking control logic ensures that the system can implement differentiated safety measures according to the degree of hydrogen leakage, which not only ensures operational safety but also avoids the impact of frequent shutdowns due to minor leaks on operational efficiency.

[0079] When the system sends a normal shutdown command, the electric valve is closed and the raw material pump 421 is stopped; the hydrogen gas generated by the continued reaction of residual formic acid in the reactor 43 is preferentially introduced into the buffer tank 70 for pressure stabilization, and after being circulated and cooled through the heat exchange module 45, the fourth solenoid valve 478 is opened to discharge it from the system.

[0080] Reference Figure 1 , Figure 2 and Figure 9In some embodiments, the formic acid storage tank 41 is provided with a vent 411, a filling port 412, and a second liquid level sensor 414. The vent 411 is connected to the external atmosphere of the cabinet to balance the internal pressure of the formic acid storage tank 41. The second liquid level sensor 414 is installed at the bottom of the formic acid storage tank 41 to monitor the liquid level in the formic acid storage tank 41 in real time and feed it back to the control module. The control module controls the liquid supply pump 26 to replenish formic acid into the formic acid storage tank 41 according to the signal from the second liquid level sensor 414.

[0081] The vent 411 is connected to the external atmosphere via a pipe to prevent a vacuum or positive pressure state inside the formic acid storage tank 41. A second liquid level sensor 414 is installed at the bottom of the formic acid storage tank 41. During operation, the liquid level is collected every 2 minutes, and the control module calculates the formic acid output per minute based on the drop in liquid level. The formic acid solution outlet 415 on the formic acid storage tank 41 is connected to the delivery ball valve 420 in the formic acid delivery module 42. The filling port 412 is connected to the outlet of the supply pump 26.

[0082] The formic acid storage tank interface 413 on the formic acid storage tank 41 is connected to the outlet of the electric valve. When the system is running, the raw material pump 421 is started, the electric valve is opened, and formic acid is delivered into the reaction vessel 43. When the liquid level in the formic acid storage tank 41 is lower than the set liquid level threshold, the control module sends a command to the supply pump 26 to start. After the liquid level reaches the set threshold, the supply pump 26 stops. The control module controls the supply pump 26 to replenish formic acid into the formic acid storage tank 41 based on the signal from the second liquid level sensor 414.

[0083] The formic acid storage tank 41 is made of a material resistant to formic acid corrosion and has a rated volume of 2-10L. In one embodiment, the formic acid storage tank 41 is made of PTFE. In another embodiment, the formic acid storage tank 41 is made of duplex steel, titanium steel, Hastelloy, or SUS316.

[0084] Reference Figure 1 , Figure 2 and Figure 5The hydrogen melting chamber 02 is also equipped with a raw material supply system 101, which includes a raw material tank 21, a tray 27, a liquid supply pump 26, a guide rail 231, and a base 232. The inlet of the liquid supply pump 26 is connected to the quick-connect connector 235 on the raw material tank 21, and the outlet is connected to the filling port 412 of the formic acid storage tank 41. The tray 27 holds the raw material tank 21 with a capacity of 25-30L formic acid solution. The tray 27 and the base 232 are slidably connected to the guide rail 231 via a slider 22, and the base 232 is fixedly connected to the cabinet. When replacing the raw material tank 21, the raw material supply system 101 is pulled out of the cabinet via the guide rail 231. Limit modules are set at both the pulling and pushing positions of the guide rail 231. After replacing the raw material tank 21, the raw material supply system 101 can be pushed back to its original position.

[0085] The control module is a programmable controller with a PLC as its core, capable of algorithm iteration and intelligent control. The system control module includes a touch screen, a PLC module, and a detection and early warning system. The PLC functional modules include a signal receiving module, a communication module, DC contactors, and AC contactors.

[0086] The implementation principle of the formic acid to hydrocarbon water system in this application embodiment is as follows: by integrating the hydrogen production module, hydrogen melting module, and control module into the same cabinet, the hydrogen purification module and its auxiliary equipment are eliminated, reducing the system volume, equipment cost, and operating energy consumption. At the same time, by utilizing the characteristic that CO2 in the formic acid cracking products enters the hydrogen melting module along with H2 and dissolves in water to form carbonic acid, acidic hydrocarbon water can be prepared without the need to add additional acidic substances. This effectively solves the problems of complex systems, high costs, and large volumes caused by the setting of hydrogen purification modules in existing formic acid hydrogen production devices, realizing integrated equipment integration and directly using the H2 and CO2 mixture to prepare hydrocarbon water, thereby reducing costs.

[0087] The above are exemplary embodiments disclosed in this invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this invention as defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0088] It should be understood that, as used herein, the singular form "a" is intended to include the plural form as well, unless the context clearly supports an exception. It should also be understood that, as used herein, "and / or" refers to any and all possible combinations of one or more of the associatedly listed items. The embodiment numbers disclosed above are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0089] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of different aspects of the invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A system for preparing hydrocarbon water from formic acid, characterized in that: The system includes a cabinet, a hydrogen production module, a hydrogen melting module, and a control module. The hydrogen production module is located inside the cabinet and includes a formic acid storage tank, a reaction vessel, a CO removal module, a cooling module, and a gas-liquid separation module connected in sequence. The reaction vessel is used to generate hydrogen-rich gas through a catalytic cracking reaction using formic acid as raw material. The hydrogen-rich gas contains hydrogen and carbon dioxide. The CO removal module is used to convert CO in the hydrogen-rich gas into CO2. The hydrogen melting module is installed inside the cabinet and connected to the hydrogen-rich gas outlet of the gas-liquid separation module via a gas pipeline, for mixing the CO-removed hydrogen-rich gas with water; the control module is installed inside the cabinet and connected to the hydrogen production module and the hydrogen melting module respectively, for controlling the operation of the hydrogen production module and the hydrogen melting module. The hydrogen-rich gas outlet of the gas-liquid separation module is connected to the gas inlet of the hydrogen melting module, so that CO2 in the hydrogen-rich gas enters the hydrogen melting module along with the hydrogen and dissolves in the water. The CO2 dissolves in the water to form carbonic acid to adjust the pH value of the water.

2. The formic acid system for preparing hydrocarbon water according to claim 1, characterized in that: The CO removal module is a low-temperature water-gas shift reactor, which is filled with a copper-based catalyst and equipped with a heater to heat the hydrogen-rich gas to 180℃-240℃, so that CO and water vapor can undergo a shift reaction to generate H2 and CO2 under the action of the catalyst.

3. The formic acid system for preparing hydrocarbon water according to claim 1, characterized in that: The cooling module includes a heat exchange module and an air-cooled radiator. The heat exchange module is located between the outlet of the CO removal module and the inlet of the air-cooled radiator, and is used to exchange heat between the high-temperature hydrogen-rich gas after CO removal and the formic acid raw material, preheating the formic acid raw material while cooling the hydrogen-rich gas. The air-cooled radiator includes multiple stainless steel capillary tubes and aluminum fins connected to the outer wall of the stainless steel capillary tubes. The air-cooled radiator is also equipped with a fan for air cooling the hydrogen-rich gas after it has been cooled by the heat exchange module.

4. The formic acid system for preparing hydrocarbon water according to claim 1, characterized in that: The gas-liquid separation module includes a return liquid tank and a gas-liquid separator. The return liquid tank is equipped with a flow divider for coarse separation of hydrogen-rich gas. The gas-liquid separator is used for fine gas-liquid separation of the coarsely separated hydrogen-rich gas. The drain outlet of the return liquid tank is connected to an adsorption tank. The adsorption tank is filled with packing material for neutralizing the acidity of the condensate. The condensate is discharged after being neutralized by the adsorption tank.

5. The formic acid system for preparing hydrocarbon water according to claim 1, characterized in that: The hydrogen melting module includes a melting tank and a concentration sensor. The melting tank is provided with a water inlet, a melting water gas inlet and a hydrocarbon water outlet. The melting water gas inlet is connected to the hydrogen-rich gas outlet of the gas-liquid separation module. The melting tank is used to mix hydrogen-rich gas after CO removal with water, and to dissolve the hydrogen-rich gas into micro-nano bubbles through cutting and cavitation processes. The concentration sensor is installed on the pipeline at the outlet of the hydrocarbon water and is used to detect the hydrogen concentration of the hydrocarbon water in real time and feed it back to the control module.

6. The formic acid system for preparing hydrocarbon water according to claim 5, characterized in that: The melting tank is equipped with a one-way valve at the melting water inlet, and an exhaust valve and a pressure gauge are installed on the top of the melting tank.

7. The formic acid system for preparing hydrocarbon water according to claim 1, characterized in that: The hydrogen production module also includes a gas distribution module, which is connected between the gas-liquid separation module and the hydrogen melting module. The gas distribution module includes a three-way valve assembly, which has a first outlet and a second outlet. The first outlet is connected to the hydrogen melting module, and the second outlet is connected to the external atmosphere of the cabinet. The control module controls the three-way valve assembly to guide the hydrogen-rich gas to the first outlet during normal system operation, and to guide the hydrogen-rich gas to the second outlet for discharge during system shutdown or emergency situations.

8. The formic acid system for preparing hydrocarbon water according to claim 1, characterized in that: The cabinet has an internal isolation structure that separates the hydrogen production module and the hydrogen melting module into different cavities. The isolation structure is a metal partition, which is sealed to the inner wall of the cabinet. The metal partition has perforations for pipes and cables to pass through, and sealing joints are provided at the perforations.

9. A formic acid system for preparing hydrocarbon water according to claim 1, characterized in that: The chamber containing the hydrogen production module is equipped with a combustible gas detection probe, an exhaust fan, and an audible and visual alarm. The combustible gas detection probe, exhaust fan, and audible and visual alarm are respectively connected to the control module via signals. When the detection value of the combustible gas detection probe exceeds a set threshold, the control module first cuts off the formic acid feed and then starts the exhaust fan.

10. A formic acid system for preparing hydrocarbon water according to claim 1, characterized in that: The formic acid storage tank is equipped with a vent, a filling port, and a second liquid level sensor. The vent is connected to the external atmosphere of the tank to balance the internal pressure of the formic acid storage tank. The second liquid level sensor is installed at the bottom of the formic acid storage tank to monitor the liquid level in the tank in real time and feed it back to the control module. The control module controls the supply pump to replenish formic acid into the formic acid storage tank according to the signal from the second liquid level sensor.

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