Wide load regulation multistable flexible ammonia synthesis system under new energy
By designing a wide load-regulated multi-steady-state flexible synthetic ammonia system under new energy, and using pressure monitoring and energy storage devices, the impact of new energy generation fluctuations on synthetic ammonia equipment is solved, and the equipment is stable operation and energy circulation is achieved, reducing power consumption and maintenance costs are reduced.
Patent Information
- Application Number
- CN202422082778.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The load of new energy power generation fluctuates greatly, resulting in repeated operation of synthetic ammonia equipment within a wide load range, increasing equipment maintenance costs and affecting equipment stability and efficiency.
Design a multi-steady-state flexible ammonia synthetic system under new energy, including new energy hydrogen production devices, nitrogen production devices, mixing tanks, pressure balance devices, ammonia synthesis towers, heat exchangers and liquid ammonia storage tanks, etc., and stabilize the equipment operation through pressure monitoring and energy storage devices (such as expansion generators, batteries), use new energy power generation to supply power, avoid the use of power grid power, and achieve pressure balance and energy circulation.
When new energy power generation is overloaded or low load, the equipment operation status is automatically adjusted to avoid equipment fluctuations, save electricity, maintain the pressure of synthetic ammonia equipment stable, and reduce equipment maintenance costs.
Smart Images
Figure CN223276244U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of synthetic ammonia, and in particular relates to a multi-stable flexible synthetic ammonia system with wide load regulation under new energy. Background Art
[0002] Green ammonia synthesis mainly relies on green ammonia production technology, which is a process that uses renewable energy to generate electricity, produces hydrogen through water electrolysis and nitrogen through air separation, and then synthesizes ammonia through the Haber process. This technology is called "green ammonia production" or "renewable ammonia" and aims to reduce carbon emissions generated by traditional ammonia production by using renewable energy throughout the process. Renewable energy power generation has large load fluctuations and poor stability, which affects the access to the grid and utilization efficiency of renewable energy power generation, and thus causes the synthetic ammonia equipment to operate at low load, full load or overload. When the equipment is repeatedly operated within such a wide load range, it will affect the equipment and increase the cost of equipment maintenance. Those skilled in the art are urgently needed to propose a system for flexible synthetic ammonia with wide load regulation and multi-stable state when power is provided by new energy. Utility Model Content
[0003] In view of this, the present invention provides a multi-stable flexible ammonia synthesis system with wide load regulation under new energy, which is used to solve the above problems.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A multi-stable flexible synthetic ammonia system with wide load regulation under new energy, comprising: a new energy hydrogen production device, a new energy nitrogen production device, a mixing tank, a first pipeline, a second pipeline, a third pipeline, a three-way valve, a new energy pressure balancing device, an ammonia synthesis tower, a heat exchanger, a cooling device and a liquid ammonia storage tank; the new energy hydrogen production device and the new energy nitrogen production device are both connected to the mixing tank, a first pressure gauge is provided on the mixing tank, one end of the first pipeline is connected to the mixing tank, and the other end is connected to the three-way valve, and one end of the second pipeline and the third pipeline are respectively connected to the other two ends of the three-way valve. The output end is connected, the new energy pressure balancing device includes a new energy power generation device, a gas compressor and a storage tank, the other end of the second pipeline is connected to the gas compressor, the gas compressor is connected to the storage tank pipeline, the new energy power generation device is electrically connected to the gas compressor, the other end of the third pipeline is connected to the heat exchanger, the storage tank is connected to the third pipeline, the heat exchanger is connected to the air inlet end of the ammonia synthesis tower, the output end of the ammonia synthesis tower is connected to the heat exchanger, the heat exchanger, the cooling device and the liquid ammonia storage tank are connected in sequence;
[0006] The new energy pressure balancing device further includes an expansion generator, which is provided on a pipeline connected between the storage tank and the third pipeline;
[0007] The communication position between the new energy hydrogen production device and the mixing tank is lower than the communication position between the new energy nitrogen production device and the mixing tank.
[0008] Furthermore, the new energy pressure balancing device also includes a battery, which is electrically connected to the expansion generator and the gas compressor.
[0009] Furthermore, the cooling device includes an ammonia cooler and an ammonia separator, the heat exchanger is connected to the ammonia cooler pipeline, the ammonia cooler is connected to the ammonia separator pipeline, the ammonia separator is provided with a liquid nitrogen output end and a nitrogen-hydrogen mixed gas output end, the liquid nitrogen output end is provided with a fourth pipeline, the nitrogen-hydrogen mixed gas output end is provided with a fifth pipeline, the fourth pipeline is connected to the liquid ammonia storage tank, and the fifth pipeline is connected to the mixing tank.
[0010] Furthermore, the cooling device further includes a cold exchanger, which is installed on a pipeline connecting the heat exchanger and the ammonia cooler, and the fifth pipeline is connected to the mixing tank through the cold exchanger.
[0011] Furthermore, the cooling device also includes a second pressure gauge, which is installed on the connecting pipeline between the cold exchanger and the ammonia cooler.
[0012] The beneficial effects of the present invention are:
[0013] 1) According to the present invention, when the synthetic ammonia equipment is overloaded due to renewable energy power generation, the first pressure gauge on the mixing tank detects a high pressure, and the nitrogen-hydrogen mixed gas in the mixing tank with the overload pressure enters the gas compressor through the three-way valve. The nitrogen-hydrogen mixed gas is then compressed and stored in the storage tank by the gas compressor. Since the renewable energy power generation capacity is strong at this time, the gas compressor is powered by the renewable energy power generation device, avoiding the use of power from the grid to drive the gas compressor, thus saving power. The nitrogen-hydrogen mixed gas that exceeds the load enters the storage tank for storage, thus avoiding fluctuations in the synthetic ammonia equipment during overload. When the synthetic ammonia equipment is underloaded due to renewable energy power generation, the nitrogen-hydrogen mixed gas stored in the mixing tank enters the third pipeline, enters the ammonia synthesis tower through the heat exchanger, replenishes the pressure in the ammonia synthesis tower, thus avoiding fluctuations in the synthetic ammonia equipment during underload. At the same time, when the nitrogen-hydrogen mixed gas is released from the storage tank, it generates electricity through the expansion generator and stores the electricity in the battery, or supplies it to other locations in the equipment that require electricity.
[0014] 2) The present invention can also observe the pressure value of the second pressure gauge. When the pressure of the synthetic ammonia equipment displayed by the second pressure gauge is high, the power of the ammonia cooler is increased, the liquefaction efficiency of ammonia is improved, and the pressure in the synthetic ammonia equipment is reduced. When the pressure of the synthetic ammonia equipment displayed by the second pressure gauge is low, the power of the ammonia cooler is reduced, the liquefaction efficiency of ammonia is reduced, and the ammonia gas is retained as much as possible for circulation in the synthetic ammonia equipment, thereby keeping the pressure in the synthetic ammonia equipment stable and reducing the impact of fluctuations in renewable energy power generation on synthetic ammonia. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.
[0016] Figure 1 It is a structural diagram of a multi-stable flexible ammonia synthesis system with wide load regulation under new energy;
[0017] Among them, in the figure:
[0018] 1- New energy hydrogen production device, 2- New energy nitrogen production device, 3- Mixing tank, 4- First pipeline, 5- Second pipeline, 6- Third pipeline, 7- Three-way valve, 8- Ammonia synthesis tower, 9- Heat exchanger, 10- Liquid ammonia storage tank, 11- First pressure gauge, 12- New energy power generation device, 13- Gas compressor, 14- Storage tank, 15- Expansion generator, 16- Battery, 17- Ammonia cooler, 18- Ammonia separator, 19- Fourth pipeline, 20- Fifth pipeline, 21- Cold exchanger, 22- Second pressure gauge. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0020] Refer to the attached Figure 1As shown, the utility model provides a multi-stable flexible synthetic ammonia system with wide load regulation under new energy, including: a new energy hydrogen production device 1, a new energy nitrogen production device 2, a mixing tank 3, a first pipeline 4, a second pipeline 5, a third pipeline 6, a three-way valve 7, a new energy pressure balancing device, an ammonia synthesis tower 8, a heat exchanger 9, a cooling device and a liquid ammonia storage tank 10; the new energy hydrogen production device 1 and the new energy nitrogen production device 2 are both connected to the mixing tank 3, and the mixing tank 3 is provided with a first pressure gauge 11, one end of the first pipeline 4 is connected to the mixing tank 3, and the other end is connected to the three-way valve 7, one end of the second pipeline 5 and the third pipeline 6 are respectively connected to the other two output ends of the three-way valve 7, the new energy pressure balancing device includes a new energy power generation device 12, a gas compressor 1 3 and a storage tank 14, the other end of the second pipeline 5 is connected to the gas compressor 13, the gas compressor 13 is connected to the storage tank 14 pipeline, the new energy power generation device 12 is electrically connected to the gas compressor 13, the other end of the third pipeline 6 is connected to the heat exchanger 9, the storage tank 14 is connected to the third pipeline 6, the heat exchanger 9 is connected to the air inlet end of the ammonia synthesis tower 8, and the output end of the ammonia synthesis tower 8 is connected to the heat exchanger 9. When the ammonia mixed gas output from the output end of the ammonia synthesis tower 8 passes through the heat exchanger 9, it is preheated by the hydrogen-nitrogen mixed gas in the third pipeline 6, and the ammonia mixed gas is cooled; the heat exchanger 9, the cooling device and the liquid ammonia storage tank 10 are connected in sequence, and when the cooled ammonia mixed gas passes through the cooling device, the ammonia is liquefied and then stored in the liquid ammonia storage tank 10.
[0021] When renewable energy power generation causes the ammonia synthesis equipment to operate at an overload, the first pressure gauge 11 on the mixing tank 3 detects a high pressure, and the nitrogen-hydrogen mixed gas in the mixing tank 3 exceeding the pressure is allowed to enter the gas compressor 13 through the three-way valve 7. The nitrogen-hydrogen mixed gas is then compressed and stored in the storage tank 14 by the gas compressor 13. Since the renewable energy power generation capacity is strong at this time, the new energy power generation device 12 is used to power the gas compressor 13, avoiding the use of power from the grid to drive the gas compressor 13, thereby saving electricity. The nitrogen-hydrogen mixed gas exceeding the load is stored in the storage tank 14, thereby avoiding fluctuations in the ammonia synthesis equipment during overload. When renewable energy power generation causes the ammonia synthesis equipment to operate at a low load, the nitrogen-hydrogen mixed gas stored in the mixing tank 3 enters the third pipeline 6, enters the ammonia synthesis tower 8 through the heat exchanger 9, replenishes the pressure in the ammonia synthesis tower 8, and avoids fluctuations in the ammonia synthesis equipment during low load.
[0022] In a preferred embodiment, the new energy pressure balancing device further includes an expansion generator 15 and a battery 16. The expansion generator 15 is disposed on the pipeline connecting the storage tank 14 and the third pipeline 6. The battery 16 is electrically connected to the expansion generator 15, and the expansion generator 15 is electrically connected to the gas compressor 13. When the new energy generation causes the synthetic ammonia plant to operate at low load, the nitrogen-hydrogen mixture stored in the mixing tank 3 enters the third pipeline 6. When the nitrogen-hydrogen mixture is released from the storage tank 14, it generates electricity through the expansion generator 15 and is stored in the battery 16. The battery 16 then powers the gas compressor 13 or other locations in the plant that require electricity.
[0023] In a preferred embodiment, the cooling device includes an ammonia cooler 17 and an ammonia separator 18. The heat exchanger 9 is connected to the ammonia cooler 17 by pipeline, and the ammonia cooler 17 is connected to the ammonia separator 18 by pipeline. The ammonia separator 18 is provided with a liquid nitrogen output port and a nitrogen-hydrogen mixed gas output port. The liquid nitrogen output port is provided with a fourth pipeline 19, and the nitrogen-hydrogen mixed gas output port is provided with a fifth pipeline 20. The fourth pipeline 19 is connected to the liquid ammonia storage tank 10, and the fifth pipeline 20 is connected to the mixing tank 3. After heat exchange in the heat exchanger 9, the ammonia mixed gas is cooled and then enters the ammonia cooler 17 for liquefaction. The liquid ammonia is then separated from the hydrogen-nitrogen mixed gas by gas-liquid separation in the ammonia separator 18. The liquid ammonia is stored in the liquid ammonia storage tank 10, and the hydrogen-nitrogen mixed gas enters the mixing tank 3 to re-synthesize ammonia.
[0024] In a preferred embodiment, the cooling device further includes a cold exchanger 21, which is installed on the pipeline connecting the heat exchanger 9 and the ammonia cooler 17. The fifth pipeline 20 is connected to the mixing tank 3 through the cold exchanger 21. The hydrogen-nitrogen mixed gas, after gas-liquid separation in the ammonia separator 18, is at a lower temperature. When passing through the cold exchanger 21, it exchanges heat with the ammonia mixed gas. The hydrogen-nitrogen mixed gas is heated before entering the mixing tank 3 to participate in the ammonia synthesis cycle again. The ammonia mixed gas is cooled before entering the ammonia cooler 17 for ammonia liquefaction, thereby improving the efficiency of ammonia liquefaction.
[0025] In a preferred embodiment, the cooling device further includes a second pressure gauge 22, which is installed on the connecting pipeline between the cold exchanger 21 and the ammonia cooler 17. By observing the pressure value of the second pressure gauge 22, when the pressure of the synthetic ammonia plant indicated by the second pressure gauge 22 is high, the power of the ammonia cooler 17 is increased to improve the ammonia liquefaction efficiency, thereby reducing the pressure within the synthetic ammonia plant. When the pressure of the synthetic ammonia plant indicated by the second pressure gauge 22 is low, the power of the ammonia cooler 17 is reduced to reduce the ammonia liquefaction efficiency, thereby retaining as much ammonia gas as possible for circulation within the synthetic ammonia plant, thereby maintaining a stable pressure within the synthetic ammonia plant and reducing the impact of fluctuations in renewable energy generation on the synthetic ammonia plant.
[0026] In a preferred embodiment, the connection position between the new energy hydrogen production device 1 and the mixing tank 3 is lower than the connection position between the new energy nitrogen production device 2 and the mixing tank 3. Hydrogen enters the mixing tank 3 from the bottom of the mixing tank 3, and nitrogen enters the mixing tank 3 from the top of the mixing tank 3. Since the density of hydrogen is smaller than that of nitrogen, hydrogen moves upward and nitrogen moves downward. In this process, hydrogen and nitrogen are fully mixed.
[0027] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.
[0028] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A multi-stable flexible ammonia synthesis system with wide load regulation under new energy, characterized by: include: A new energy hydrogen production device (1), a new energy nitrogen production device (2), a mixing tank (3), a first pipeline (4), a second pipeline (5), a third pipeline (6), a three-way valve (7), a new energy pressure balancing device, an ammonia synthesis tower (8), a heat exchanger (9), a cooling device and a liquid ammonia storage tank (10); the new energy hydrogen production device (1) and the new energy nitrogen production device (2) are both connected to the mixing tank (3), a first pressure gauge (11) is provided on the mixing tank (3), one end of the first pipeline (4) is connected to the mixing tank (3), and the other end is connected to the three-way valve (7), one end of the second pipeline (5) and the third pipeline (6) are respectively connected to the other two output ends of the three-way valve (7), and the new energy pressure The balancing device comprises a new energy power generation device (12), a gas compressor (13) and a storage tank (14); the other end of the second pipeline (5) is in communication with the gas compressor (13); the gas compressor (13) is in communication with the storage tank (14) via a pipeline; the new energy power generation device (12) is electrically connected to the gas compressor (13); the other end of the third pipeline (6) is in communication with the heat exchanger (9); the storage tank (14) is in communication with the third pipeline (6); the heat exchanger (9) is in communication with the air inlet end of the ammonia synthesis tower (8); the output end of the ammonia synthesis tower (8) is in communication with the heat exchanger (9); the heat exchanger (9), the cooling device and the liquid ammonia storage tank (10) are in communication in sequence; The new energy pressure balancing device further comprises an expansion generator (15), and the expansion generator (15) is arranged on a pipeline connecting the storage tank (14) and the third pipeline (6); The communication position between the new energy hydrogen production device (1) and the mixing tank (3) is lower than the communication position between the new energy nitrogen production device (2) and the mixing tank (3).
2. The multi-stable flexible ammonia synthesis system with wide load regulation under new energy according to claim 1 is characterized in that: The new energy pressure balancing device further comprises a storage battery (16), wherein the storage battery (16) is electrically connected to the expansion generator (15), and the storage battery (16) is electrically connected to the gas compressor (13).
3. The multi-stable flexible ammonia synthesis system with wide load regulation under new energy according to claim 1 is characterized in that: The cooling device comprises an ammonia cooler (17) and an ammonia separator (18); the heat exchanger (9) is in communication with the ammonia cooler (17) through a pipeline; the ammonia cooler (17) is in communication with the ammonia separator (18) through a pipeline; the ammonia separator (18) is provided with a liquid nitrogen output end and a nitrogen-hydrogen mixed gas output end; the liquid nitrogen output end is provided with a fourth pipeline (19); the nitrogen-hydrogen mixed gas output end is provided with a fifth pipeline (20); the fourth pipeline (19) is in communication with the liquid ammonia storage tank (10); and the fifth pipeline (20) is in communication with the mixing tank (3).
4. The multi-stable flexible ammonia synthesis system with wide load regulation under new energy according to claim 3 is characterized in that: The cooling device further comprises a cold exchanger (21), wherein the cold exchanger (21) is installed on a pipeline connecting the heat exchanger (9) and the ammonia cooler (17), and the fifth pipeline (20) is connected to the mixing tank (3) through the cold exchanger (21).
5. The multi-stable flexible ammonia synthesis system with wide load regulation under new energy according to claim 4 is characterized in that: The cooling device further comprises a second pressure gauge (22), which is installed on a connecting pipeline between the cold exchanger (21) and the ammonia cooler (17).