A high-efficiency ammonia removal and recovery device for refined ammonia
By introducing components such as ammonia removal towers and ammonia absorption tanks into the ammonia removal equipment, and combining them with the secondary steam circulation of the MVR compressor unit, the problems of high ammonia content and low ammonia water recovery concentration in existing equipment have been solved, achieving efficient ammonia recovery and resource recycling, and reducing acid consumption and energy consumption.
Patent Information
- Application Number
- CN202522682502.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-18
AI Technical Summary
Existing deammoniation equipment results in high ammonia content during the deammoniation process of arginine solution, leading to a large consumption of acid for subsequent pH adjustment. Furthermore, the concentration of ammonia water recovered after deammoniation is low, making it impossible to reuse directly.
The circulating system consists of components such as a deammoniation tower, ammonia absorption tank, condenser, and plate heat exchanger. It reduces ammonia content through secondary steam convection mass transfer and heat transfer, and forms ammonia water circulation absorption through concentrated ammonia water pump and plate heat exchanger. Combined with MVR compressor unit, it realizes secondary steam internal circulation and reduces live steam consumption.
It significantly reduced the acid consumption for subsequent pH adjustment, increased the ammonia concentration, achieved efficient ammonia recovery and resource recycling, and improved the energy efficiency and environmental friendliness of the equipment.
Smart Images
Figure CN224937673U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ammonia removal equipment, specifically a high-efficiency ammonia removal and recovery equipment for refined ammonia. Background Technology
[0002] Arginine deamination refers to the chemical reaction in which the amino group in the arginine molecule is removed. It is mainly divided into two categories: enzyme-catalyzed deamination and chemically catalyzed deamination. It is widely used in the synthesis of pharmaceutical intermediates, biological detection, food industry and other fields.
[0003] Existing deammoniation equipment results in high ammonia content in arginine solutions, leading to high acid consumption for subsequent pH adjustment and low ammonia recovery concentration after deammoniation, making it unsuitable for direct reuse. Utility Model Content
[0004] Therefore, the purpose of this utility model is to provide a high-efficiency ammonia removal and recovery device for refined ammonia, so as to solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency ammonia removal and recovery device, comprising an ammonia removal component, an absorption component, a preheating component, a primary reboiler component, a compression component, a secondary reboiler component, and a cooling component; the ammonia removal component includes an ammonia removal tower, a first feed valve is installed at the upper inlet on one side of the ammonia removal tower, a first and second steam pipe is connected to the lower air inlet on the other side of the ammonia removal tower, and a first feeding pipe is connected to the bottom outlet of the ammonia removal tower; the absorption component includes an ammonia absorption tank, a third condensate pipe and a sixth condensate pipe are respectively connected to the lower liquid inlet on one side of the ammonia absorption tank, a concentrated ammonia water pump is connected to the bottom outlet of the ammonia absorption tank through the first condensate water pipe, and a concentrated ammonia water outlet valve is connected to the outlet end of the concentrated ammonia water pump through the second condensate water pipe; The cooling assembly includes a condenser and a plate heat exchanger. A first non-condensable gas pipe connects the upper air inlet of the condenser to the upper air outlet of the ammonia absorption tank. A seventh condensate pipe connects the lower liquid outlet of the condenser to the liquid inlet on the other side of the ammonia absorption tank. A water inlet valve is connected to the lower liquid inlet on the other side of the condenser. A vacuum pump is connected to the air outlet on the other side of the condenser via the non-condensable gas valve. A cooling water pipe connects the lower liquid outlet on the other side of the condenser to the upper liquid inlet of the plate heat exchanger. A cooling water outlet valve is connected to the lower water outlet on one side of the plate heat exchanger. An eighth condensate pipe connects the upper liquid outlet on the other side of the plate heat exchanger to the top liquid inlet of the ammonia absorption tank. The second condensate pipe is connected to the lower liquid inlet on the other side of the plate heat exchanger.
[0006] By adopting the above technical solution, on the one hand, the high-ammonia-content arginine eluent in the deammoniation tower flows from top to bottom, forming convection with the rising secondary steam input from the first and second steam pipes. Through efficient mass and heat transfer, the ammonia content of the arginine eluent is significantly reduced, thereby reducing the acid consumption for subsequent pH adjustment from the source. On the other hand, the ammonia absorption tank can collect low-concentration ammonia water from the third and sixth condensate pipes. At the same time, the ammonia water is transported to the plate heat exchanger for temperature adjustment by the concentrated ammonia water pump, and then returned to the top of the ammonia absorption tank through the eighth condensate water pipe to achieve low-temperature spraying, forming a circulating absorption system, which significantly increases the ammonia water concentration to meet the reuse requirements.
[0007] Furthermore, the compression assembly includes an MVR compressor unit, with two air inlets of the MVR compressor unit respectively connected to a steam inlet valve and a third secondary steam pipe. The third secondary steam pipe is connected to the air outlet at the top of the deammoniation tower. The air outlet of the MVR compressor unit is connected to a second secondary steam pipe. The water outlet of the MVR compressor unit is connected to a compressor drain pump through a fifth condensate pipe. A condensate valve is connected between the compressor drain pump and the first condensate pipe.
[0008] By adopting the above technical solution, the MVR compressor unit uses live steam as the initial heat source when the equipment is first started up, ensuring rapid system heating. After the equipment is running normally, the live steam serves as a heat loss compensation source. At the same time, the third and secondary steam pipes introduce secondary steam generated by the deammoniation tower and subsequent components into the MVR compressor unit. After being pressurized and heated, the secondary steam is transported to the first-stage reboiler through the second and secondary steam pipes as a heating source, forming an internal circulation of secondary steam and significantly reducing live steam consumption. In addition, the condensate generated by the MVR compressor unit can be transported to the first condensate pipe through the compressor drain pump and condensate valve, flowing into the ammonia recovery system, avoiding water waste and further improving the energy efficiency and environmental friendliness of the equipment.
[0009] Furthermore, the primary reboiler assembly includes a primary reboiler, the bottom outlet of which is connected to a primary circulation pump via a third feed pipe, the first feed pipe being connected to the third feed pipe, a fourth feed pipe being connected between the liquid outlet of the primary circulation pump and the top inlet of the primary reboiler, the lower side outlet of the primary reboiler being connected to a first secondary steam pipe, and the upper side inlet of the primary reboiler being connected to a second secondary steam pipe.
[0010] By adopting the above technical solution, the low-ammonia content material discharged from the bottom of the deammoniation tower flows into the third feed pipe through the first feed pipe. Driven by the first-stage circulating pump, it returns to the top of the first-stage reboiler through the fourth feed pipe, forming a circulating flow of material. This ensures that the material exchanges heat fully with the high-temperature secondary steam input through the second and third secondary steam pipes. The secondary steam during the heat exchange process is transported to the deammoniation tower through the first and second secondary steam pipes, continuously providing a heat source for the deammoniation process and improving the deammoniation efficiency. At the same time, the circulating flow design avoids local overheating or stagnation of material in the first-stage reboiler, ensuring the uniformity and stability of material processing.
[0011] Furthermore, the secondary reboiler assembly includes a secondary reboiler. A secondary circulation pump is connected to the bottom outlet of the secondary reboiler via a seventh feed pipe. A sixth feed pipe connects the liquid outlet of the secondary circulation pump to the top inlet of the secondary reboiler. A feed valve is installed on one side of the sixth feed pipe. A fifth feed pipe connects the feed valve to a fourth feed pipe. A discharge valve is installed on the other side of the sixth feed pipe. A second level transmitter is installed below one side of the secondary reboiler. A fourth condensate pipe connects the side inlet of the secondary reboiler to the side outlet of the primary reboiler. A second non-condensable gas pipe connects the side inlet of the secondary reboiler to the side outlet of the primary reboiler. A third secondary steam pipe connects to the side outlet of the secondary reboiler. A third non-condensable gas pipe connects to the upper outlet on the other side of the secondary reboiler. The sixth condensate pipe connects to the lower outlet on the other side of the secondary reboiler.
[0012] By adopting the above technical solution, on the one hand, the second level transmitter detects the liquid level in the secondary reboiler in real time, and controls the feeding valve to allow the material in the primary reboiler to enter the secondary reboiler through the fifth feeding pipe. Under the action of the secondary circulation pump, material circulation is formed, realizing deep deammoniation of the material. The deammoniated material can be discharged through the discharge valve. On the other hand, the ammonia water produced by the secondary reboiler is transported to the ammonia absorption tank through the sixth condensate pipe, and the non-condensable gas is transported to the preheating component through the third non-condensable gas pipe, realizing the full recovery of ammonia and waste heat and improving the overall resource utilization rate of the equipment.
[0013] Furthermore, the preheating component includes a non-condensable gas preheater, a second feed valve is installed at the bottom inlet of the non-condensable gas preheater, a second feed pipe is connected to the top outlet of the non-condensable gas preheater, the second feed pipe is connected to the first feed valve, a third condensate pipe is connected to the liquid outlet at the lower side of the non-condensable gas preheater, and a third non-condensable gas pipe is connected to the air inlet at the upper side of the non-condensable gas preheater.
[0014] By adopting the above technical solution, the arginine material to be treated enters the non-condensable gas preheater through the second feed valve, while the high-temperature non-condensable gas generated by the secondary reboiler enters the preheater through the third non-condensable gas pipe to exchange heat with the material, transferring the residual heat in the non-condensable gas to the material, so that the material is heated in advance; the preheated material enters the deammoniation tower through the second feed pipe and the first feed valve, which can reduce the heat consumption of secondary steam in the deammoniation tower and improve the deammoniation efficiency; at the same time, the ammonia water generated after the non-condensable gas exchanges heat with the material is transported to the ammonia absorption tank through the third condensate pipe to avoid waste of residual heat and loss of ammonia.
[0015] Furthermore, a first level transmitter is installed on one side of the bottom of the deammoniation tower. The first level transmitter is used to detect the liquid level inside the deammoniation tower. The first level transmitter is connected to the first feed valve, which can automatically open and close according to the liquid level inside the deammoniation tower.
[0016] By adopting the above technical solution, the first level transmitter collects the liquid level data in the deammoniation tower in real time. When the liquid level is lower than the set threshold, it automatically controls the first feed valve to open, allowing the preheated material to enter the deammoniation tower. When the liquid level reaches the set upper limit, the first feed valve automatically closes to prevent material overflow or insufficient deammoniation due to excessively low liquid level. This design requires no manual intervention, which not only reduces labor costs but also ensures a stable liquid level in the deammoniation tower, providing a continuous and stable operating condition for convective mass transfer and heat transfer, and ensuring deammoniation efficiency and equipment operation safety.
[0017] Furthermore, the first feed valve, the concentrated ammonia water outlet valve, and the non-condensable gas valve are all flange ball valves, and the water inlet valve and the cooling water outlet valve are all flange butterfly valves.
[0018] By adopting the above technical solutions, the flange ball valve features excellent sealing performance, low flow resistance, and fast opening and closing speed. It is suitable for the first feed valve (controlling arginine material, requiring prevention of leakage and material retention), concentrated ammonia water outlet valve (controlling high-concentration ammonia water, requiring guaranteed sealing and corrosion resistance), and non-condensable gas valve (controlling non-condensable gas, requiring rapid opening and closing to regulate pressure). It can effectively reduce media loss and pipeline blockage risk. The flange butterfly valve has the advantages of compact structure, low cost, and strong flow capacity. It is suitable for inlet valves and cooling water outlet valves (controlling large flow rates of cooling water, with lower requirements for opening and closing speed). It can reduce equipment manufacturing costs while meeting the stable delivery requirements of cooling water. Both types of valves use flange connections, which are convenient for installation and maintenance, and have high connection strength, adapting to the long-term operating conditions of the equipment.
[0019] In summary, the present invention has the following main advantages:
[0020] 1. This utility model injects secondary steam into the lower part of the deammoniation tower and injects high-ammonia-content arginine eluent into the upper part. The high-ammonia-content arginine eluent flows downward and forms convection with the rising secondary steam. By utilizing efficient mass and heat transfer, the low-ammonia-content arginine eluent is discharged, which greatly reduces the acid consumption for subsequent pH adjustment.
[0021] 2. This utility model introduces low-concentration ammonia water and uncondensed ammonia gas into the ammonia absorption tank. Ammonia gas is highly soluble in water, so the ammonia gas dissolves in the low-concentration ammonia water, increasing the ammonia concentration in the ammonia water. The absorbed ammonia water is output from the bottom of the ammonia absorption tank and enters a plate heat exchanger. After being temperature-adjusted by the plate heat exchanger, the ammonia water is sent back to the top of the ammonia absorption tank to achieve low-temperature spraying and complete circulation. The circulation spraying achieves the circulation absorption effect. Attached Figure Description
[0022] Figure 1 This is a system flowchart of the present invention;
[0023] Figure 2 This is a schematic diagram of the ammonia removal tower structure of this utility model;
[0024] Figure 3 This is a schematic diagram of the ammonia absorption tank structure of this utility model;
[0025] Figure 4 This is a schematic diagram of the condenser structure of this utility model;
[0026] Figure 5 This is a schematic diagram of the plate heat exchanger structure of this utility model;
[0027] Figure 6 This is a schematic diagram of the non-condensable gas preheater of this utility model.
[0028] Figure 7 This is a schematic diagram of the structure of the first-stage reboiler of this utility model;
[0029] Figure 8 This is a schematic diagram of the two-stage reboiler structure of this utility model.
[0030] In the diagram: 1. Ammonia removal assembly; 101. Ammonia removal tower; 102. First feed valve; 103. First level transmitter; 104. First feed pipe; 2. Absorption assembly; 201. Ammonia absorption tank; 202. First non-condensable gas pipe; 203. First condensate pipe; 204. Concentrated ammonia water pump; 205. Concentrated ammonia water outlet valve; 206. Second condensate pipe; 3. Preheating assembly; 301. Second feed valve; 302. Non-condensable gas preheater; 303. Second feed pipe; 304. Third condensate pipe; 4. First-stage reboiler assembly; 401. First-stage reboiler; 402. Third feed pipe; 403. First-stage circulating pump; 404. Fourth feed pipe; 405. Fifth feed pipe; 406. First and second steam pipes; 407. Fourth condensate pipe; 408. Second non-condensable gas pipe; 5. Compression assembly; 501. MVR compressor unit; 502. Steam inlet valve; 503. Fifth condensate pipe; 504. Secondary steam pipe; 505. Third secondary steam pipe; 506. Compressor drain pump; 507. Condensate valve; 6. Secondary reboiler assembly; 601. Secondary reboiler; 602. Feed valve; 603. Sixth feed pipe; 604. Secondary circulation pump; 605. Seventh feed pipe; 606. Discharge valve; 607. Sixth condensate pipe; 608. Third non-condensable gas pipe; 609. Second level transmitter; 7. Cooling assembly; 701. Condenser; 702. Inlet valve; 703. Cooling water pipe; 704. Seventh condensate pipe; 705. Plate heat exchanger; 706. Cooling water outlet valve; 707. Eighth condensate pipe; 708. Non-condensable gas valve; 709. Vacuum pump. Detailed Implementation
[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0032] The embodiments of this utility model will be described below based on its overall structure.
[0033] Example 1:
[0034] A high-efficiency ammonia removal and recovery device for refined ammonia, such as Figures 1-5 As shown, it includes ammonia removal component 1, absorption component 2, preheating component 3, primary reboiler component 4, compression component 5, secondary reboiler component 6, and cooling component 7.
[0035] Specifically, the ammonia removal assembly 1 includes an ammonia removal tower 101. A first feed valve 102 is installed at the upper inlet on one side of the ammonia removal tower 101, and a first and second steam pipe 406 is connected to the lower air inlet on the other side of the ammonia removal tower 101. A first feed pipe 104 is connected to the bottom outlet of the ammonia removal tower 101. The material enters the non-condensable gas preheater 302 through the second feed valve 301 for preheating. The preheated material enters the second feed pipe 303. When the first level transmitter 103 detects that the liquid level in the ammonia removal tower 101 is low, the material in the second feed pipe 303 enters the ammonia removal tower 101 through the first feed valve 102 to start the ammonia removal operation.
[0036] Specifically, the absorption assembly 2 includes an ammonia absorption tank 201. A third condensate pipe 304 and a sixth condensate pipe 607 are connected to the lower inlet on one side of the ammonia absorption tank 201. A concentrated ammonia pump 204 is connected to the bottom outlet of the ammonia absorption tank 201 via a first condensate pipe 203. The outlet of the concentrated ammonia pump 204 is connected to a concentrated ammonia outlet valve 205 via a second condensate pipe 206. The ammonia water generated in the secondary reboiler 601 enters the ammonia absorption tank 201 through the sixth condensate pipe 607, and the non-condensable gas is preheated. The ammonia water in the device 302 enters the ammonia absorption tank 201 through the third condensate pipe 304. After being conditioned by the plate heat exchanger 705, the ammonia water returns to the inside of the ammonia absorption tank 201 through the eighth condensate pipe 707 to achieve low-temperature spraying. The sprayed ammonia water is then sent back into the plate heat exchanger 705 by the concentrated ammonia water pump 204 through the first condensate pipe 203 to achieve circulating spray absorption. The ammonia water in the circulation process can be output through the concentrated ammonia water outlet valve 205 to complete the recovery of concentrated ammonia water.
[0037] Specifically, the cooling assembly 7 includes a condenser 701 and a plate heat exchanger 705. A first non-condensable gas pipe 202 connects the upper air inlet of the condenser 701 to the upper air outlet of the ammonia absorption tank 201. A seventh condensate pipe 704 connects the lower liquid outlet of the condenser 701 to the liquid inlet on the other side of the ammonia absorption tank 201. A water inlet valve 702 is connected to the lower liquid inlet on the other side of the condenser 701. A vacuum pump 709 is connected to the air outlet on the other side of the condenser 701 through a non-condensable gas valve 708. During this process, the non-condensable gas in the ammonia absorption tank 201 enters the condenser 701 through the first non-condensable gas pipe 202. The condenser 701 exchanges heat with external cooling water through the water inlet valve 702, causing the ammonia droplets in the non-condensable gas to condense and return to the ammonia absorption tank 201 through the seventh condensate pipe 704. The remaining non-condensable gas is drawn away by the vacuum pump 709 through the non-condensable gas valve 708, treated, and then discharged. The cooling water flowing out of the condenser enters the plate heat exchanger 705 through the cooling water pipe 703 to participate in heat exchange and regulate the temperature of the ammonia water. Finally, the cooling water is discharged through the cooling water outlet valve 706. A cooling water pipe 703 connects the lower outlet on the other side of the condenser 701 to the upper inlet on the side of the plate heat exchanger 705. A cooling water outlet valve 706 is connected to the lower outlet on one side of the plate heat exchanger 705, and a cooling water outlet valve 706 is connected to the upper outlet on the other side of the plate heat exchanger 705. The top inlet of 01 is connected to the eighth condensate pipe 707, and the second condensate pipe 206 is connected to the lower inlet on the other side of the plate heat exchanger 705. The concentrated ammonia water pump 204 sends the ammonia water inside the ammonia absorption tank 201 into the plate heat exchanger 705 through the first condensate water pipe 203 and the second condensate water pipe 206. After the temperature is adjusted by the plate heat exchanger 705, the ammonia water returns to the upper part of the ammonia absorption tank 201 through the eighth condensate water pipe 707 to achieve low-temperature spraying.
[0038] See Figure 1 , Figure 6 , Figure 7 and Figure 8 In the above embodiments:
[0039] Specifically, the compression assembly 5 includes an MVR compressor unit 501. The two inlets of the MVR compressor unit 501 are respectively connected to a steam inlet valve 502 and a third / secondary steam pipe 505. The third / secondary steam pipe 505 is connected to the top outlet of the ammonia removal tower 101. The outlet of the MVR compressor unit 501 is connected to a second / secondary steam pipe 504. The water outlet of the MVR compressor unit 501 is connected to a compressor drain pump 506 via a fifth condensate pipe 503. A condensate valve 507 is connected between the compressor drain pump 506 and the first condensate pipe 203. During initial startup, the MVR compressor unit 501 receives live steam as an initial heat source through the steam inlet valve 502. After the MVR compressor unit 501 operates normally, live steam... Steam serves as a heat source supplement to compensate for heat loss during the secondary steam cycle and prevent thermal balance collapse of the recovery equipment. The secondary steam from the pressurized cycle of the MVR compressor unit 501 enters the first-stage reboiler 401 through the second secondary steam pipe 504, and then enters the deammoniation tower 101 through the first secondary steam pipe 406. The secondary steam in the deammoniation tower 101 and the second-stage reboiler 601 returns to the MVR compressor unit 501 for repressurized circulation through the third secondary steam pipe 505, thus reducing operating costs through secondary steam recycling. At the same time, the condensate discharged from the MVR compressor unit 501 is added to the first condensate pipe 203 through the fifth condensate pipe 503, the compressor drain pump 506, and the condensate valve 507.
[0040] Specifically, the primary reboiler assembly 4 includes a primary reboiler 401. The bottom outlet of the primary reboiler 401 is connected to a primary circulation pump 403 via a third feed pipe 402. A first feed pipe 104 is connected to the third feed pipe 402. A fourth feed pipe 404 is connected between the liquid outlet of the primary circulation pump 403 and the top inlet of the primary reboiler 401. The lower side outlet of the primary reboiler 401 is connected to a first secondary steam pipe 406. The upper side inlet of the primary reboiler 401 is connected to a second secondary steam pipe 504. The material enters the third feed pipe 402 through the first feed pipe 104. The primary circulation pump 403 circulates the material within the fourth feed pipe 404, the primary reboiler 401, the third feed pipe 402, and the primary circulation pump 403, thereby improving the ammonia recovery rate.
[0041] Specifically, the secondary reboiler assembly 6 includes a secondary reboiler 601. A secondary circulation pump 604 is connected to the bottom outlet of the secondary reboiler 601 via a seventh feed pipe 605. A sixth feed pipe 603 connects the outlet of the secondary circulation pump 604 to the top inlet of the secondary reboiler 601. A feed valve 602 is installed on one side of the sixth feed pipe 603. A fifth feed pipe 405 connects the feed valve 602 to the fourth feed pipe 404. A discharge valve 606 is installed on the other side of the sixth feed pipe 603. A second level transmitter 609 is installed below one side of the secondary reboiler 601. The side inlet of the secondary reboiler 601 is connected to the primary reboiler 401. A fourth condensate pipe 407 is connected between the side liquid outlets. A second non-condensable gas pipe 408 is connected between the side air inlet of the secondary reboiler 601 and the side air outlet of the primary reboiler 401. A third secondary steam pipe 505 is connected to the side air outlet of the secondary reboiler 601. A third non-condensable gas pipe 608 is connected to the upper air outlet on the other side of the secondary reboiler 601. A sixth condensate pipe 607 is connected to the lower liquid outlet on the other side of the secondary reboiler 601. A secondary circulation pump 604 circulates the material within the sixth feed pipe 603, the secondary reboiler 601, the seventh feed pipe 605, and the secondary circulation pump 604, thereby improving the ammonia recovery rate through secondary reboiling.
[0042] Specifically, the preheating component 3 includes a non-condensable gas preheater 302. A second feed valve 301 is installed at the bottom inlet of the non-condensable gas preheater 302, and a second feed pipe 303 is connected to the top outlet of the non-condensable gas preheater 302. The second feed pipe 303 is connected to the first feed valve 102. A third condensate pipe 304 is connected to the liquid outlet at the lower side of the non-condensable gas preheater 302, and a third non-condensable gas pipe 608 is connected to the air inlet at the upper side of the non-condensable gas preheater 302. The material enters the non-condensable gas preheater 302 through the second feed valve 301. During this period, the non-condensable gas generated inside the first-stage reboiler 401 will enter the second-stage reboiler 601 through the second non-condensable gas pipe 408, and then enter the non-condensable gas preheater 302 through the third non-condensable gas pipe 608 to preheat the material.
[0043] Example 2:
[0044] Based on the above embodiment one, the following settings are now implemented.
[0045] See Figure 1 and Figure 2In the above embodiment, a first level transmitter 103 is installed on one side of the bottom of the deammoniation tower 101. The first level transmitter 103 is used to detect the liquid level inside the deammoniation tower 101. The first level transmitter 103 is connected to the first feed valve 102. The first feed valve 102 can automatically open and close according to the liquid level inside the deammoniation tower 101. When the first level transmitter 103 detects that the liquid level inside the deammoniation tower 101 is low, the material in the second feed pipe 303 enters the deammoniation tower 101 through the first feed valve 102; then the material enters the third feed pipe 402 through the first feed pipe 104.
[0046] Example 3:
[0047] Based on the above embodiment one, the following settings are now implemented.
[0048] See Figure 1 In the above embodiments, the first feed valve 102, the concentrated ammonia water outlet valve 205, and the non-condensable gas valve 708 are all flange ball valves, which have excellent sealing performance, low flow resistance, convenient and quick opening and closing, convenient installation and maintenance, stable connection, and wide applicability; the water inlet valve 702 and the cooling water outlet valve 706 are both flange butterfly valves, which have compact structure, low flow resistance, low cost, convenient operation, convenient installation and maintenance, stable connection, and wide applicability.
[0049] The implementation principle of this utility model is as follows: First, the material enters the non-condensable gas preheater 302 through the second feed valve 301 for preheating; the preheated material enters the second feed pipe 303. When the first level transmitter 103 detects that the liquid level in the deammoniation tower 101 is low, the material in the second feed pipe 303 enters the deammoniation tower 101 through the first feed valve 102; then the material enters the third feed pipe 402 through the first feed pipe 104, and the primary circulation pump 403 causes the material to pass through the fourth feed pipe 404 and the primary reboiler. The material circulates within feed pipes 401, 402, and 403. When the second level transmitter 609 detects a low level in the secondary reboiler 601, the material in feed pipe 404 enters the sixth feed pipe 603 via feed pipe 405 and feed valve 602. The secondary circulation pump 604 circulates the material within feed pipe 603, secondary reboiler 601, feed pipe 605, and the secondary circulation pump 604. The material from the secondary circulation can be discharged through discharge valve 606.
[0050] The non-condensable gas generated inside the first-stage reboiler 401 will enter the second-stage reboiler 601 through the second non-condensable gas pipe 408, and then enter the non-condensable gas preheater 302 through the third non-condensable gas pipe 608 to participate in the preheating of the material.
[0051] During initial startup, the MVR compressor unit 501 uses live steam as an initial heat source via the steam inlet valve 502. Once the MVR compressor unit 501 is running normally, the live steam is used as a supplementary heat source to compensate for heat loss during the secondary steam cycle and prevent thermal balance collapse of the recovery equipment. The secondary steam from the pressurized cycle of the MVR compressor unit 501 enters the first-stage reboiler 401 through the second secondary steam pipe 504, and then enters the ammonia removal tower 101 through the first secondary steam pipe 406. The secondary steam in the ammonia removal tower 101 and the second-stage reboiler 601 returns to the MVR compressor unit 501 for repressurized circulation through the third secondary steam pipe 505. Simultaneously, the condensate discharged from the MVR compressor unit 501 is added to the first condensate pipe 203 through the fifth condensate pipe 503, the compressor drain pump 506, and the condensate valve 507.
[0052] The ammonia water inside the first-stage reboiler 401 enters the second-stage reboiler 601 through the fourth condensate pipe 407; the ammonia water produced in the second-stage reboiler 601 enters the ammonia absorption tank 201 through the sixth condensate pipe 607, and the ammonia water in the non-condensable gas preheater 302 enters the ammonia absorption tank 201 through the third condensate pipe 304; then the concentrated ammonia water pump 204 sends the ammonia water inside the ammonia absorption tank 201 into the plate heat exchanger 705 through the first condensate pipe 203 and the second condensate pipe 206. After the temperature is adjusted by the plate heat exchanger 705, the ammonia water returns to the inside of the ammonia absorption tank 201 through the eighth condensate pipe 707 to achieve low-temperature spraying. The sprayed ammonia water is then sent back into the plate heat exchanger 705 by the concentrated ammonia water pump 204 through the first condensate pipe 203 to achieve circulating spray absorption. The ammonia water in the circulation process can be output through the concentrated ammonia water outlet valve 205 to complete the recovery of concentrated ammonia water.
[0053] During this period, the non-condensable gas in the ammonia absorption tank 201 enters the condenser 701 through the first non-condensable gas pipe 202. The condenser 701 is connected to external cooling water through the water inlet valve 702 for heat exchange, which causes the ammonia droplets in the non-condensable gas to condense and return to the ammonia absorption tank 201 through the seventh condensate pipe 704. The remaining non-condensable gas is drawn away by the vacuum pump 709 through the non-condensable gas valve 708, treated, and then discharged. The cooling water flowing out of the condenser 701 enters the plate heat exchanger 705 through the cooling water pipe 703 to participate in heat exchange and adjust the temperature of the ammonia water. Finally, the cooling water is output through the cooling water outlet valve 706.
[0054] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. A high-efficiency ammonia removal and recovery device, comprising an ammonia removal component, an absorption component, a preheating component, a primary reboiler component, a compression component, a secondary reboiler component, and a cooling component, characterized in that: The ammonia removal assembly includes an ammonia removal tower. A first feed valve is installed at the upper inlet on one side of the ammonia removal tower, a first secondary steam pipe is connected to the lower air inlet on the other side of the ammonia removal tower, and a first feeding pipe is connected to the discharge outlet at the bottom of the ammonia removal tower. The absorption assembly includes an ammonia absorption tank. The inlet on one side of the ammonia absorption tank is connected to a third condensate pipe and a sixth condensate pipe. The outlet at the bottom of the ammonia absorption tank is connected to a concentrated ammonia pump through a first condensate pipe. The outlet of the concentrated ammonia pump is connected to a concentrated ammonia outlet valve through a second condensate pipe. The cooling assembly includes a condenser and a plate heat exchanger. A first non-condensable gas pipe connects the upper air inlet of the condenser to the upper air outlet of the ammonia absorption tank. A seventh condensate pipe connects the lower liquid outlet of the condenser to the liquid inlet on the other side of the ammonia absorption tank. A water inlet valve is connected to the lower liquid inlet on the other side of the condenser. A vacuum pump is connected to the air outlet on the other side of the condenser via the non-condensable gas valve. A cooling water pipe connects the lower liquid outlet on the other side of the condenser to the upper liquid inlet of the plate heat exchanger. A cooling water outlet valve is connected to the lower water outlet on one side of the plate heat exchanger. An eighth condensate pipe connects the upper liquid outlet on the other side of the plate heat exchanger to the top liquid inlet of the ammonia absorption tank. The second condensate pipe is connected to the lower liquid inlet on the other side of the plate heat exchanger.
2. The high-efficiency ammonia removal and recovery equipment according to claim 1, characterized in that: The compression assembly includes an MVR compressor unit. The two air inlets of the MVR compressor unit are respectively connected to a steam inlet valve and a third secondary steam pipe. The third secondary steam pipe is connected to the air outlet at the top of the deammoniation tower. The air outlet of the MVR compressor unit is connected to a second secondary steam pipe. The water outlet of the MVR compressor unit is connected to a compressor drain pump through a fifth condensate pipe. A condensate valve is connected between the compressor drain pump and the first condensate pipe.
3. The high-efficiency ammonia removal and recovery equipment according to claim 2, characterized in that: The primary reboiler assembly includes a primary reboiler. The bottom outlet of the primary reboiler is connected to a primary circulation pump via a third feed pipe. The first feed pipe is connected to the third feed pipe. A fourth feed pipe is connected between the liquid outlet of the primary circulation pump and the top inlet of the primary reboiler. The lower side outlet of the primary reboiler is connected to the first secondary steam pipe. The upper side inlet of the primary reboiler is connected to the second secondary steam pipe.
4. The high-efficiency ammonia removal and recovery equipment according to claim 3, characterized in that: The secondary reboiler assembly includes a secondary reboiler. A secondary circulation pump is connected to the bottom outlet of the secondary reboiler via a seventh feed pipe. A sixth feed pipe connects the outlet of the secondary circulation pump to the top inlet of the secondary reboiler. A feed valve is installed on one side of the sixth feed pipe. A fifth feed pipe connects the feed valve to a fourth feed pipe. An outlet valve is installed on the other side of the sixth feed pipe. A second level transmitter is installed below one side of the secondary reboiler. A fourth condensate pipe connects the side inlet of the secondary reboiler to the side outlet of the primary reboiler. A second non-condensable gas pipe connects the side inlet of the secondary reboiler to the side outlet of the primary reboiler. A third secondary steam pipe connects to the side outlet of the secondary reboiler. A third non-condensable gas pipe connects to the upper outlet on the other side of the secondary reboiler. The sixth condensate pipe connects to the lower outlet on the other side of the secondary reboiler.
5. The high-efficiency ammonia removal and recovery equipment according to claim 4, characterized in that: The preheating assembly includes a non-condensable gas preheater, a second feed valve installed at the bottom inlet of the non-condensable gas preheater, a second feed pipe connected to the top outlet of the non-condensable gas preheater, the second feed pipe being connected to the first feed valve, a third condensate pipe connected to the liquid outlet at the lower side of the non-condensable gas preheater, and a third non-condensable gas pipe connected to the air inlet at the upper side of the non-condensable gas preheater.
6. The high-efficiency ammonia removal and recovery equipment according to claim 1, characterized in that: A first level transmitter is installed on one side of the bottom of the deammoniation tower. The first level transmitter is used to detect the liquid level inside the deammoniation tower. The first level transmitter is connected to the first feed valve, which can automatically open and close according to the liquid level inside the deammoniation tower.
7. The high-efficiency ammonia removal and recovery equipment according to claim 1, characterized in that: The first feed valve, concentrated ammonia water outlet valve, and non-condensable gas valve are all flange ball valves, and the water inlet valve and cooling water outlet valve are all flange butterfly valves.