A heat conducting oil system for hydrogen production from gamma-butyrolactone

Abstract

The application provides a gamma-butyrolactone hydrogen production system, belonging to the field of chemical production. The gamma-butyrolactone hydrogen production system includes a GBL production system for producing GBL and generating byproduct hydrogen, which includes a reactor and a condensation separation device connected to the reactor outlet. The application applies the hydrogen generated in the GBL production process to the heat conducting oil mechanism, realizes efficient utilization of hydrogen, avoids waste of hydrogen, improves resource utilization, reduces production cost, purifies and pressurizes hydrogen through the hydrogen treatment unit, ensures that hydrogen can meet the use requirements of the heat conducting oil furnace burner 4, ensures the stable operation of the heat conducting oil mechanism, uses hydrogen as fuel for the heat conducting oil furnace, has the advantages of high combustion efficiency, clean and environmentally friendly, can reduce the energy consumption of the heat conducting oil mechanism, reduce pollutant emissions, and meet the development requirements of green chemical industry.

Description

Technical Field

[0001] This application relates to the field of chemical production, and more specifically, to a heat transfer oil system for the regeneration of hydrogen from γ-butyrolactone. Background Technology

[0002] The production of γ-butyrolactone typically generates a certain amount of hydrogen gas as a byproduct. Meanwhile, heat transfer oil systems are widely used in chemical production for heating reactants and other processes, requiring significant energy consumption to maintain high-temperature operation.

[0003] In the existing γ-butyrolactone production process, the hydrogen produced as a byproduct is often directly emitted or simply used as fuel in traditional processes, failing to fully realize its value. Direct venting also carries significant risks, resulting in waste and energy consumption. Therefore, improvements are needed. Utility Model Content

[0004] To overcome the above deficiencies, this application provides a heat transfer oil system for hydrogen production from γ-butyrolactone, which aims to improve the problem that the hydrogen generated as a byproduct in the production of γ-butyrolactone is not fully utilized, thus reducing the practicality of the equipment.

[0005] This application provides a heat transfer oil system for the regeneration of hydrogen from γ-butyrolactone, including a GBL regeneration system for producing GBL and generating hydrogen as a byproduct, comprising a reactor and a condensation and separation device connected to the reactor outlet. A heat transfer oil mechanism, comprising a heat transfer oil furnace and a heat transfer oil circulation pipeline connected thereto; A hydrogen processing unit is connected between the GBL regeneration system and the heat transfer oil mechanism, and is used to purify and pressurize hydrogen. Burner 4 is installed on the thermal oil furnace and connected to the hydrogen treatment unit for burning the treated hydrogen.

[0006] In one specific implementation, the GBL regeneration system further includes a hydrogen buffer tank, the inlet of which is connected to the hydrogen outlet of the condensation separation device.

[0007] In the above process, the fluctuations in hydrogen production and the stability of the burner 4 demand are balanced by a hydrogen buffer tank, ensuring a stable hydrogen supply.

[0008] In one specific embodiment, the hydrogen treatment unit includes a purification device for removing impurities and moisture from the hydrogen, and a pressurization device for pressurizing the purified hydrogen to the pressure required by the burner 4.

[0009] In the above process, impurities and moisture are removed by the purification device and the pressurization device to prevent impurities from forming scale in the burner 4 or affecting the combustion efficiency. At the same time, the hydrogen pressure is increased to the required value of the burner 4 to ensure that the hydrogen is fully burned in the burner 4, thereby improving energy utilization efficiency and reducing unburned gas emissions.

[0010] In one specific implementation, the condensation separation device includes a deep condensation section for introducing a low-temperature cooling medium and performing deep condensation on the gas-liquid mixture from the reactor. A gas-liquid separator is provided in the gas phase space above the deep condensation section for final purification and separation of the condensed gas.

[0011] In the above process, the gas-liquid mixture is deeply condensed by a low-temperature medium, which can maximize the recovery of GBL liquid products and improve the product yield. The gas-liquid separator above further purifies and separates the residual gas, reducing liquid impurities carried in the hydrogen and improving the efficiency and purity of subsequent hydrogen processing.

[0012] In one specific implementation, the deep condensation section is equipped with a coil heat exchanger with circulation pipe interfaces on both sides, and the low-temperature cooling medium introduced is a chilled brine or an ethylene glycol aqueous solution.

[0013] In the above process, the contact area between the cooling medium and the gas-liquid mixture is increased by using a coil heat exchanger, thereby improving the condensation efficiency.

[0014] In one specific implementation, the gas-liquid separator is provided with a swirl plate, and the top of the gas-liquid separator shell is fixed to a hydrogen outlet, wherein a drive motor is fixed to the top of the hydrogen outlet, and the output end of the drive motor is fixed to the swirl plate.

[0015] In the above process, the cyclone plate rotates under the drive of the motor, and the centrifugal force is used to enhance the gas-liquid separation effect. The tiny liquid droplets remaining in the gas are thrown towards the wall of the container and collected, which further improves the purity of hydrogen and reduces the phenomenon of liquid carrying in hydrogen.

[0016] In one specific implementation, the bottom of the condensation separation device is provided with a conical guide pipe and a liquid collection tank.

[0017] In the above process, the condensed liquid is guided to flow into the collection tank through a conical guide tube to avoid liquid stagnation.

[0018] In one specific implementation, the surface of the tapered guide tube is provided with a gas-liquid mixture inlet.

[0019] In the above process, by setting an inlet for the gas-liquid mixture on the surface of the conical guide tube, the mixture can immediately contact the cooling surface after entering, shortening the condensation path and improving the initial condensation efficiency. At the same time, the guiding effect of the conical structure is used to achieve the initial separation of the gas and liquid phases.

[0020] In one specific implementation, a perforated guide plate is provided between the deep condensation section and the gas-liquid separator.

[0021] In the above process, the perforated guide plate acts as a buffer and distributes the airflow between the deep condensation section and the gas-liquid separator, preventing the high-speed airflow from directly impacting the internal structure of the gas-liquid separator, reducing secondary entrainment of droplets caused by disturbance, and ensuring that the gas enters the separator evenly, thereby improving the separation effect.

[0022] In one specific implementation, the perforated guide plate has nine through holes distributed on its surface, wherein the through holes connect the deep condensation section and the gas-liquid separator.

[0023] In the above implementation process, the design of nine through holes can optimize the gas flow path, ensuring gas flow efficiency and forming a stable flow field before the gas enters the gas-liquid separator through reasonable hole distribution. Combined with the swirl plate, it further improves the uniformity and thoroughness of gas-liquid separation, ultimately improving the purity of hydrogen.

[0024] Compared with the prior art, the beneficial effects of this application are as follows: 1. This application achieves efficient utilization of hydrogen by applying the hydrogen generated during the GBL regeneration process to the heat transfer oil mechanism, thereby avoiding hydrogen waste, improving resource utilization, and reducing production costs.

[0025] 2. In this application, hydrogen is purified and pressurized by a hydrogen treatment unit, which ensures that the hydrogen can meet the usage requirements of the thermal oil furnace burner 4 and guarantees the stable operation of the thermal oil mechanism.

[0026] 3. This application utilizes hydrogen as fuel for the thermal oil furnace, which has advantages such as high combustion efficiency and clean environmental protection. It can reduce the energy consumption of the thermal oil mechanism and reduce pollutant emissions, which meets the development requirements of green chemical industry.

[0027] 4. In this application, by setting a swirl plate in the condensation separation device, hydrogen can be further separated by the swirl plate, preventing liquid droplets and mist entrained in the gas, making the output hydrogen purer, reducing the load on the subsequent purification device, and improving the quality of hydrogen as fuel, making combustion more stable, and reducing the risk of the thermal oil furnace shutting down or reducing efficiency due to fuel quality fluctuations. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the workflow provided in the embodiments of this application; Figure 2 A front view schematic diagram of the condensation separation device provided in the embodiments of this application; Figure 3 A side view of the condensation separation device provided in the embodiments of this application; Figure 4 A schematic diagram of the internal structure of the condensation separation device provided in the embodiments of this application; Figure 5 A schematic diagram of the swirl plate structure provided for an embodiment of this application; Figure 6 A schematic diagram of the perforated guide plate structure provided in this application embodiment; Figure 7 A schematic diagram of a coil heat exchanger provided for an embodiment of this application.

[0030] In the diagram: 1. GBL production system; 11. Reactor; 12. Condensation and separation device; 121. Deep condensation section; 1211. Coil heat exchanger; 1212. Circulation pipe interface; 122. Gas-liquid separator; 1221. Swirl plate; 1222. Drive motor; 123. Conical guide pipe; 124. Gas-liquid mixture inlet; 125. Liquid collection tank; 126. Perforated guide plate; 127. Hydrogen outlet; 13. Hydrogen buffer tank; 2. Heat transfer oil mechanism; 21. Heat transfer oil furnace; 22. Heat transfer oil circulation pipeline; 3. Hydrogen treatment unit; 31. Purification device; 32. Pressurization device; 4. Burner. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0032] Please see Figure 1-7 This application provides a heat transfer oil system for the regeneration of hydrogen from γ-butyrolactone, including a GBL regeneration system 1 for producing GBL and generating hydrogen as a byproduct, which includes a reactor 11 and a condensation and separation device 12 connected to the outlet of the reactor 11.

[0033] The condensation separation device 12 includes a deep condensation section 121, which is used to introduce a low-temperature cooling medium and perform deep condensation on the gas-liquid mixture from the reactor 11. The deep condensation section 121 is equipped with a coil-type heat exchanger 1211, and has circulation pipe interfaces 1212 on both sides. The low-temperature cooling medium introduced is either chilled brine or an ethylene glycol aqueous solution. The coil-type heat exchanger 1211 increases the contact area between the cooling medium and the gas-liquid mixture, thereby improving condensation efficiency, enabling more complete condensation of the GBL liquid in the gas-liquid mixture, maximizing the recovery of the GBL liquid product, and increasing product yield.

[0034] A gas-liquid separator 122 is installed in the gas phase space above the deep condensation section 121 for final purification and separation of the condensed gas. The gas-liquid separator 122 contains a swirl plate 1221, and a hydrogen outlet 127 is fixed to the top of the separator's outer shell. A drive motor 1222 is fixed to the top of the hydrogen outlet 127, and the output end of the drive motor 1222 is fixed to the swirl plate 1221. The swirl plate 1221 rotates under the drive motor 1222, utilizing centrifugal force to enhance the gas-liquid separation effect. This throws and collects residual tiny liquid droplets in the gas against the container wall, further improving hydrogen purity, reducing liquid carryover in the hydrogen, and providing a purer gas source for subsequent hydrogen processing and utilization.

[0035] The bottom of the condensation separation device 12 is provided with a conical guide pipe 123 and a liquid collection tank 125, wherein the surface of the conical guide pipe 123 is provided with a gas-liquid mixture inlet 124. The conical guide pipe 123 guides the condensed liquid to flow towards the liquid collection tank 125, avoiding liquid stagnation and ensuring that the condensate can be collected and treated in a timely manner. By setting the gas-liquid mixture inlet 124 on the surface of the conical guide pipe 123, the mixture can immediately contact the cooling surface after entering, shortening the condensation path and improving the initial condensation efficiency. At the same time, the guiding effect of the conical structure enables the gas and liquid phases to be initially separated, reducing the workload of the subsequent deep condensation section 121.

[0036] A perforated guide plate 126 is provided between the deep condensation section 121 and the gas-liquid separator 122. The perforated guide plate 126 acts as a buffer and distributes the airflow evenly between the deep condensation section 121 and the gas-liquid separator 122, preventing high-speed airflow from directly impacting the internal structure of the gas-liquid separator 122, reducing secondary entrainment of droplets caused by disturbance, and ensuring uniform gas entry into the separator, thus improving the separation effect. The surface of the perforated guide plate 126 has nine through holes, which connect the deep condensation section 121 and the gas-liquid separator 122. This nine-hole design optimizes the gas flow path, ensuring gas flow efficiency and creating a stable flow field before the airflow enters the gas-liquid separator 122 through a reasonable hole distribution. Combined with the swirl plate 1221, this further enhances the uniformity and thoroughness of gas-liquid separation, ultimately improving the purity of hydrogen.

[0037] The GBL restart system 1 also includes a hydrogen buffer tank 13, the inlet of which is connected to the hydrogen outlet 127 of the condensation and separation unit 12. The hydrogen buffer tank 13 balances the fluctuations in hydrogen production and the stability of the burner 4's demand, ensuring a stable hydrogen supply and preventing fluctuations in hydrogen production from affecting the normal operation of the burner 4, thus guaranteeing the stable operation of the entire system.

[0038] The heat transfer oil mechanism 2 includes a heat transfer oil furnace 21 and a heat transfer oil circulation pipe 22 connected thereto. The heat transfer oil mechanism 2 provides a stable heat supply for the entire GBL production system 1. The heat transfer oil furnace 21 heats the heat transfer oil to a set temperature and transfers the heat to the equipment that needs to be heated, such as the reactor 11, through the heat transfer oil circulation pipe 22, ensuring that the reaction is carried out under suitable temperature conditions and maintaining the stability and efficiency of the reaction.

[0039] The hydrogen treatment unit 3 is connected between the GBL regeneration system 1 and the heat transfer oil mechanism 2. It is used to purify and pressurize hydrogen. The hydrogen treatment unit 3 includes a purification device 31 and a pressurization device 32. The purification device 31 removes impurities and moisture from the hydrogen, preventing scale buildup in the burner 4 or affecting combustion efficiency, thus ensuring the normal operation and service life of the burner 4. The pressurization device 32 pressurizes the purified hydrogen to the pressure required by the burner 4, ensuring complete combustion of hydrogen within the burner 4, improving energy efficiency, reducing unburned gas emissions, and enhancing the overall system's energy utilization and environmental performance.

[0040] The burner 4 is installed on the thermal oil furnace 21 and connected to the hydrogen treatment unit 3. It is used to burn the treated hydrogen. The burner 4 burns the purified and pressurized hydrogen, and the heat generated is used to heat the thermal oil in the thermal oil furnace 21, realizing the rational use of hydrogen, converting the chemical energy of hydrogen into thermal energy, providing the required heat for the system, and reducing the direct emission of hydrogen, thus reducing the impact on the environment.

[0041] The working principle of this heat transfer oil system for γ-butyrolactone hydrogen production is as follows: First, a dehydrogenation reaction is carried out in reactor 11 of the GBL production system 1 to directly generate a mixture of GBL and hydrogen. Then, the mixture enters the condensation and separation device 12, where the GBL component is deeply condensed and separated for recovery. The hydrogen, after preliminary purification, enters the hydrogen buffer tank 13 for temporary storage to balance the fluctuation of hydrogen production and subsequent usage needs. Next, after the hydrogen is output from the hydrogen buffer tank 13, it first enters the purification device 31 of the hydrogen treatment unit 3 to remove impurities and moisture. Then, it is pressurized to the pressure required by the pressurization device 32 to ensure combustion efficiency. Finally, the hydrogen that has reached the required pressure is transported to the burner 4 of the heat transfer oil furnace 21 in the heat transfer oil mechanism 2. After mixing with air, it is fully combusted, providing a stable heat source for the heat transfer oil furnace 21 and heating the internal heat transfer oil. The heated heat transfer oil circulates in the system through the heat transfer oil circulation pipe 22, continuously providing the required heat energy for the reaction process of reactor 11, realizing the recycling of energy.

[0042] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A heat transfer oil system for hydrogen regeneration using γ-butyrolactone, characterized in that, include: GBL production system (1), used to produce GBL and generate by-product hydrogen, includes a reactor (11) and a condensation separation unit (12) connected to the outlet of the reactor (11). The heat transfer oil mechanism (2) includes a heat transfer oil furnace (21) and a heat transfer oil circulation pipe (22) connected thereto. Hydrogen processing unit (3), which is connected between the GBL regeneration system (1) and the heat transfer oil mechanism (2), is used to purify and pressurize hydrogen. The burner (4) is installed on the thermal oil furnace (21) and connected to the hydrogen processing unit (3) for burning the processed hydrogen.

2. The heat transfer oil system for γ-butyrolactone hydrogen regeneration according to claim 1, characterized in that, The GBL production system (1) also includes a hydrogen buffer tank (13), the inlet of which is connected to the hydrogen outlet (127) of the condensation separation device (12).

3. The heat transfer oil system for γ-butyrolactone hydrogen regeneration according to claim 1, characterized in that, The hydrogen processing unit (3) includes a purification device (31) for removing impurities and moisture from the hydrogen, and a pressurization device (32) for pressurizing the purified hydrogen to the pressure required by the burner (4).

4. The heat transfer oil system for γ-butyrolactone hydrogen regeneration according to claim 1, characterized in that, The condensation separation device (12) includes a deep condensation section (121) for introducing a low-temperature cooling medium and performing deep condensation on the gas-liquid mixture from the reactor (11). A gas-liquid separator (122) is provided in the gas phase space above the deep condensation section (121) for final purification and separation of the condensed gas.

5. A heat transfer oil system for hydrogen regeneration using γ-butyrolactone according to claim 4, characterized in that, The deep condensation section (121) is equipped with a coil heat exchanger (1211) and circulation pipe interfaces (1212) on both sides. The low-temperature cooling medium introduced into it is either frozen brine or ethylene glycol aqueous solution.

6. A heat transfer oil system for hydrogen regeneration using γ-butyrolactone according to claim 5, characterized in that, The gas-liquid separator (122) is provided with a swirl plate (1221) and the top of the gas-liquid separator (122) is fixed to the hydrogen outlet (127). A drive motor (1222) is fixed to the top of the hydrogen outlet (127), and the output end of the drive motor (1222) is fixed to the swirl plate (1221).

7. A heat transfer oil system for hydrogen regeneration using γ-butyrolactone according to claim 6, characterized in that, The bottom of the condensation separation device (12) is provided with a conical guide pipe (123) and a liquid collection tank (125).

8. A heat transfer oil system for hydrogen regeneration using γ-butyrolactone according to claim 7, characterized in that, The surface of the tapered guide tube (123) is provided with a gas-liquid mixture inlet (124).

9. A heat transfer oil system for hydrogen regeneration using γ-butyrolactone according to claim 8, characterized in that, A perforated guide plate (126) is provided between the deep condensation section (121) and the gas-liquid separator (122).

10. A heat transfer oil system for hydrogen regeneration using γ-butyrolactone according to claim 9, characterized in that, The perforated guide plate (126) has nine through holes distributed on its surface, which are connected to the deep condensation section (121) and the gas-liquid separator (122).

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