Device for evaluating performance and loss of desulfurizing agent based on complex iron method

Abstract

The utility model discloses a device for evaluating the performance and loss of a desulfurizing agent based on a complex iron method, which relates to the technical field of complex iron desulfurization and specifically comprises a gas inlet module, a desulfurization module, a desulfurizing agent regeneration module, a sulfur precipitation module and a desulfurizing agent self-circulation module which are connected in sequence, the central control module is in communication connection with the monitoring module; the tail gas treatment module is connected with the desulfurization module; the desulfurization module adopts a desulfurization tower; the desulfurizing tower comprises a gas inlet, a gas outlet, a desulfurizing agent inlet and a desulfurizing agent outlet; the gas inlet module is connected with a gas inlet of the desulfurization module, a desulfurizer outlet of the desulfurization module is connected with the desulfurizer regeneration module, and a desulfurizer inlet of the desulfurization module is connected with the desulfurizer self-circulation module. According to the utility model, the data collected by the monitoring module is transmitted to the central control module, and the central control module receives and processes the data to obtain the performance index of the desulfurizing agent and the loss index of the desulfurizing agent, so that the performance of the desulfurizing agent and the loss of the desulfurizing agent are accurately evaluated in real time.

Description

Technical Field

[0001] This utility model relates to the field of complexed iron desulfurization technology, specifically to a device for evaluating the performance and loss of desulfurizing agents based on the complexed iron method. Background Technology

[0002] Complexed iron desulfurization technology is a wet desulfurization technology that uses complexed iron as a catalyst. It is mainly used to treat and purify tail gas from natural gas and coke oven gas containing high concentrations of hydrogen sulfide, and in sulfur recovery units. The principle is that the desulfurizing agent converts hydrogen sulfide into elemental sulfur, ensuring that the hydrogen sulfide content in the purified gas meets national standards. Compared to traditional amine and alkali desulfurization processes, complexed iron desulfurization technology features high sulfur capacity, low byproduct salt content, simple process, environmental friendliness, regenerable catalyst, and high-purity recovered sulfur that can be supplied to downstream industries.

[0003] The most important aspects of complex iron desulfurization technology are the performance indicators of the desulfurizing agent and the desulfurization process indicators. Currently, the laboratory cannot effectively evaluate the desulfurizing agent loss in the performance and process indicators of the desulfurizing agent under continuous operation. Utility Model Content

[0004] This invention provides a device for evaluating the performance and loss of desulfurizing agents based on the complexed iron method, in order to solve the problem in the prior art that the loss of desulfurizing agents in the performance and process indicators of desulfurizing agents cannot be effectively evaluated.

[0005] The device for evaluating the performance and loss of desulfurizing agents based on the complexed iron method of this utility model adopts the following technical solution:

[0006] The device includes: an air intake module, a desulfurization module, a desulfurizing agent regeneration module, a sulfur precipitation module, and a desulfurizing agent self-circulation module connected in sequence; it also includes a monitoring module, a central control module that is communicatively connected to the monitoring module, and an exhaust gas treatment module that is connected to the desulfurization module.

[0007] The desulfurization module adopts a desulfurization tower; the desulfurization tower includes an air inlet, an air outlet, a desulfurizing agent inlet, and a desulfurizing agent outlet; the air inlet module is connected to the air inlet of the desulfurization module, the desulfurizing agent outlet of the desulfurization module is connected to the desulfurizing agent regeneration module, the desulfurizing agent inlet of the desulfurization module is connected to the desulfurizing agent self-circulation module, and the air outlet of the desulfurization module is connected to the tail gas treatment module.

[0008] The monitoring module includes a first online hydrogen sulfide analyzer, a first desulfurization liquid detection port, a second pressure gauge, a second online hydrogen sulfide analyzer, and a second desulfurization liquid detection port;

[0009] The exhaust gas treatment module uses an exhaust gas absorption device, and the first inlet of the exhaust gas absorption device is connected to the outlet of the desulfurization tower.

[0010] The central control module uses a control monitor with a display screen. The first online hydrogen sulfide analyzer, the first desulfurization liquid detection port, the pressure gauge, the second online hydrogen sulfide analyzer, and the second desulfurization liquid detection port are all connected to the control monitor.

[0011] Preferably, the air intake module includes an air intake device, a gas mixing tank, and a second flow meter connected in sequence, with the flow meter connected to the air inlet of the desulfurization tower; a first online hydrogen sulfide analyzer is installed between the gas mixing tank and the air inlet of the desulfurization tower.

[0012] Preferably, the air intake device includes a hydrogen sulfide channel, a nitrogen channel, and a carbon dioxide channel, all of which are connected to a gas mixing tank.

[0013] The hydrogen sulfide channel, nitrogen channel, and carbon dioxide channel each include a ball valve, a solenoid valve, a first pressure gauge, a first flow meter, a needle valve, and a check valve connected in sequence.

[0014] Preferably, the first desulfurization liquid detection port is located on one side of the desulfurization tower.

[0015] Preferably, the second pressure gauge and the second online hydrogen sulfide analyzer are located between the outlet of the desulfurization tower and the tail gas absorption device.

[0016] Preferably, the desulfurizing agent regeneration module includes a first liquid circulation pump, a regeneration reaction tank, an air pump, a third flow meter, and a gas diffuser; the first liquid circulation pump is connected to the desulfurizing agent outlet of the desulfurization tower, the first inlet of the regeneration reaction tank is connected to the first liquid circulation pump, the air pump and the third flow meter are connected in sequence to the second inlet of the regeneration reaction tank, and the gas diffuser is installed inside the regeneration reaction tank.

[0017] Preferably, the sulfur settling module includes a sulfur settling tank and a liquid inlet device. The liquid inlet device is connected to the first inlet of the sulfur settling tank and is communicatively connected to a control monitor. The first outlet of the regeneration reaction tank is connected to the second inlet of the sulfur settling tank, and the second outlet of the regeneration reaction tank is connected to the second inlet of the tail gas absorption device. The second desulfurization liquid detection port is located on one side of the sulfur settling tank.

[0018] Preferably, the desulfurizing agent self-circulation module includes a second liquid circulation pump and an inlet nozzle connected in sequence. The inlet of the second liquid circulation pump is connected to the outlet of the sulfur settling tank, and the outlet of the inlet nozzle is connected to the desulfurizing agent inlet of the desulfurization tower.

[0019] The advantages of this utility model compared to the prior art are:

[0020] 1. In this utility model, the monitoring module collects data from multiple links in the entire device, and transmits the collected data to the central control module. The central control module receives the data, processes and calculates the data, and obtains the performance index and the loss index of the desulfurizing agent, so as to accurately and in real time evaluate the performance and loss of the desulfurizing agent.

[0021] 2. In this utility model, a liquid inlet device is set up to add desulfurizing agent to the sulfur settling tank in a timely manner, ensuring that the entire desulfurization device is always equipped with desulfurizing agent of appropriate content and appropriate pH value, so as to ensure desulfurization efficiency. At the same time, the control monitor can also monitor the total amount of desulfurizing agent added to the sulfur settling tank by the liquid inlet device, that is, evaluate the amount of desulfurizing agent loss. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the hydrogen sulfide channel of this utility model.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Desulfurization tower; 2. First online hydrogen sulfide analyzer; 3. First desulfurization liquid detection port; 4. Second pressure gauge; 5. Second online hydrogen sulfide analyzer; 6. Second desulfurization liquid detection port; 7. Control and monitoring device; 8. Air inlet device; 9. Gas mixing tank; 10. Second flow meter; 11. First liquid circulation pump; 12. Regeneration reaction tank; 13. Air pump; 14. Third flow meter; 15. Gas diffuser; 16. Sulfur settling tank; 17. Second liquid circulation pump; 18. Liquid inlet nozzle; 19. Tail gas absorption device; 81. Ball valve; 82. Solenoid valve; 83. First pressure gauge; 84. First flow meter; 85. Needle valve; 86. Check valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] An embodiment of the device for evaluating the performance and loss of desulfurizing agents based on the complexed iron method according to this utility model is as follows: Figure 1 and Figure 2 As shown, the device includes an air intake module, a desulfurization module, a desulfurizing agent regeneration module, a sulfur precipitation module, and a desulfurizing agent self-circulation module connected in sequence. It also includes a monitoring module, a central control module that communicates with the monitoring module, and an exhaust gas treatment module that is connected with the desulfurization module.

[0029] The desulfurization module uses desulfurization tower 1; desulfurization tower 1 includes an air inlet, an air outlet, a desulfurizing agent inlet, and a desulfurizing agent outlet; the air inlet module is connected to the air inlet of the desulfurization module, the desulfurizing agent outlet of the desulfurization module is connected to the desulfurizing agent regeneration module, the desulfurizing agent inlet of the desulfurization module is connected to the desulfurizing agent self-circulation module, and the air outlet of the desulfurization module is connected to the tail gas treatment module.

[0030] The monitoring module includes a first online hydrogen sulfide analyzer 2, a first desulfurization liquid detection port 3, a second pressure gauge 4, a second online hydrogen sulfide analyzer 5, and a second desulfurization liquid detection port 6;

[0031] The exhaust gas treatment module uses an exhaust gas absorption device 19, and the first inlet of the exhaust gas absorption device 19 is connected to the outlet of the desulfurization tower 1.

[0032] The central control module uses a control monitor 7 with a display screen. The first online hydrogen sulfide analyzer 2, the first desulfurization liquid detection port 3, the pressure gauge 4, the second online hydrogen sulfide analyzer 5, and the second desulfurization liquid detection port 6 are all connected to the control monitor 7.

[0033] In this embodiment, it should be noted that the control monitor 7 is communicatively connected to the first online hydrogen sulfide analyzer 2 to monitor the hydrogen sulfide concentration at the inlet of the desulfurization tower 1, and the control monitor 7 is communicatively connected to the second online hydrogen sulfide analyzer 5 to monitor the hydrogen sulfide concentration at the outlet of the desulfurization tower 1. The desulfurization purification rate is calculated using the hydrogen sulfide concentration information from the two locations, which serves as an indicator for evaluating the performance of the desulfurizing agent.

[0034] In this embodiment, it should be noted that the control monitor 7 is communicatively connected to the first desulfurization liquid detection port 3 to monitor the pH value in the desulfurization tower 1, and the control monitor 7 is connected to the second desulfurization liquid detection port 6 to monitor the pH value in the desulfurization tower 1.

[0035] In this embodiment, it should be noted that the controller 7 is connected to the pressure gauge 4 to monitor the gas pressure value inside the desulfurization tower 1. The normal pressure value inside the desulfurization tower 1 should be between 0 MPa and 0.5 MPa. If the pressure value inside the desulfurization tower 1 exceeds the normal pressure value range, the controller will remind the staff to turn off the power of the device and inspect and clean the inside of the desulfurization tower 1 until the normal pressure is restored.

[0036] In this embodiment, the air intake module includes an air intake device 8, a gas mixing tank 9, and a second flow meter 10 connected in sequence. The flow meter 10 is connected to the air inlet of the desulfurization tower 1. The first hydrogen sulfide online analyzer 2 is set between the gas mixing tank 9 and the air inlet of the desulfurization tower 1.

[0037] In this embodiment, the air intake device 8 includes a hydrogen sulfide channel, a nitrogen channel, and a carbon dioxide channel, all of which are connected to the gas mixing tank 9.

[0038] The hydrogen sulfide channel, nitrogen channel, and carbon dioxide channel each include a ball valve 81, a solenoid valve 82, a first pressure gauge 83, a first flow meter 84, a needle valve 85, and a check valve 86 connected in sequence.

[0039] In this embodiment, the first desulfurization liquid detection port 3 is located on one side of the desulfurization tower 1.

[0040] In this embodiment, the second pressure gauge 4 and the second hydrogen sulfide online analyzer 5 are installed between the outlet of the desulfurization tower 1 and the tail gas absorption device 19.

[0041] In this embodiment, the desulfurizing agent regeneration module includes a first liquid circulation pump 11, a regeneration reaction tank 12, an air pump 13, a third flow meter 14, and a gas diffuser 15. The first liquid circulation pump 11 is connected to the desulfurizing agent outlet of the desulfurization tower 1, the first inlet of the regeneration reaction tank 12 is connected to the first liquid circulation pump 11, the air pump 13 and the third flow meter 14 are connected to the second inlet of the regeneration reaction tank 12 in sequence, and the gas diffuser 15 is disposed inside the regeneration reaction tank 12.

[0042] In this embodiment, the sulfur settling module includes a sulfur settling tank 16 and a liquid inlet device 20. The liquid inlet device 20 is connected to the first inlet of the sulfur settling tank 16 and is communicatively connected to the control monitor 7. The first outlet of the regeneration reaction tank 12 is connected to the second inlet of the sulfur settling tank 16, and the second outlet of the regeneration reaction tank 12 is connected to the second inlet of the tail gas absorption device 19. The second desulfurization liquid detection port 6 is located on one side of the sulfur settling tank 16.

[0043] In this embodiment, it should be noted that even with the desulfurizing agent regeneration module, unavoidable losses of desulfurizing agent still occur throughout the entire device. As the desulfurizing agent decreases, the pH value in the device drops, affecting the desulfurization effect. Therefore, an inlet device 20 is provided to add desulfurizing agent to the sulfur settling tank 16 in a timely manner. Specifically, when the control monitor 7 detects that the pH value at either the first desulfurizing liquid detection port 3 or the second desulfurizing liquid detection port 6 is less than 8, the control monitor 7 controls the inlet device 20 to open and add desulfurizing agent to the sulfur settling tank 16 until the pH value at either the first desulfurizing liquid detection port 3 or the second desulfurizing liquid detection port 6 is greater than 8.5. Then, the inlet device 20 is closed, and the inlet time and flow rate are recorded. Adding desulfurizing agent is stopped. Simultaneously, the control monitor 7 monitors the flow rate and duration of adding desulfurizing agent to the sulfur settling tank 15 via the inlet device 20.

[0044] In this embodiment, the desulfurizing agent self-circulation module includes a second liquid circulation pump 17 and an inlet nozzle 18 connected in sequence. The inlet of the second liquid circulation pump 17 is connected to the outlet of the sulfur settling tank 16, and the outlet of the inlet nozzle 18 is connected to the desulfurizing agent inlet of the desulfurization tower 1.

[0045] In practical use, the nitrogen, hydrogen sulfide, and carbon dioxide in the air inlet device 8 are first mixed in the gas mixing tank 9 to form a mixed gas, which then enters the desulfurization tower 1 through the air inlet at the bottom of the desulfurization tower 1. The liquid inlet nozzle 18 delivers the desulfurizing agent from the desulfurizing agent inlet at the top of the desulfurization tower 1 into the desulfurization tower 1. The mixed gas flows from bottom to top, and the desulfurizing agent flows from top to bottom, ensuring sufficient contact and absorption. The tail gas generated in the desulfurization tower 1 enters the tail gas absorption device 19 through the gas outlet at the top of the desulfurization tower 1, ensuring that the hydrogen sulfide is completely absorbed. The desulfurizing agent in the desulfurization tower 1 is discharged from the desulfurizing agent outlet at the bottom of the desulfurization tower 1, and then transported to the regeneration reaction tank 12 through the first liquid circulation pump 11 via the first inlet of the regeneration reaction tank 12. The air pump 13 delivers outside air to the regeneration reaction tank 12 through the second inlet of the regeneration reaction tank 12. At the bottom of tank 12, air reaches the gas diffuser 15 and diffuses fully, reacting with the desulfurizing agent to regenerate. The resulting desulfurizing agent enters the sulfur settling tank 16 through the first outlet of the regeneration reaction tank 12. The gas generated in the regeneration reaction tank 1 enters the tail gas absorption device 19 through the second inlet for treatment. The desulfurizing agent in the sulfur settling tank 16 is transported to the liquid inlet nozzle 18 by the second liquid circulation pump 17. The liquid inlet nozzle 18 enters the desulfurizing tower 1 through the desulfurizing agent inlet at the top of the desulfurizing tower 1, completing the circulation of the desulfurizing agent. The control monitor 7 records, calculates, and displays the data collected in real time by the first hydrogen sulfide online analyzer 2, the first desulfurizing liquid detection port 3, the second pressure gauge 4, the second hydrogen sulfide online analyzer 5, and the second desulfurizing liquid detection port 6, completing the test to evaluate the performance of the desulfurizing agent. In addition, during the desulfurizer performance evaluation test, when the control monitor 7 detects that the pH value at either the first desulfurization liquid detection port 3 or the second desulfurization liquid detection port 6 is less than 8, the control monitor 7 controls the liquid inlet device 20 to add desulfurizer to the sulfur settling tank 16 until the pH value at either the first desulfurization liquid detection port 3 or the second desulfurization liquid detection port 6 is greater than 8.5, at which point the addition of desulfurizer is stopped. At the same time, the control monitor 7 monitors the flow rate and duration of adding desulfurizer in the liquid inlet device 20, thereby calculating the amount of desulfurizer loss and completing the evaluation test of the amount of desulfurizer loss in the process parameters.

[0046] Specifically:

[0047] The performance index for desulfurizing agents is the desulfurization purification rate, which is calculated using the following formula:

[0048]

[0049] In the formula: A1 is the hydrogen sulfide concentration (mg / m³) at the inlet of desulfurization tower 1 collected by the first online hydrogen sulfide analyzer 2. 3 A2 represents the hydrogen sulfide concentration (mg / m³) at the outlet of desulfurization tower 1, collected by the second online hydrogen sulfide analyzer 5. 3 ;

[0050] The indicator for evaluating the loss of desulfurizing agent is the total amount of desulfurizing agent added:

[0051] Total amount of desulfurizer added = B1 × T1

[0052] In the formula: B1 is the flow rate (mL / min) of the desulfurizing agent added by the liquid inlet device 20 to the sulfur settling tank 16; T1 is the time (min) for the desulfurizing agent to be added by the liquid inlet device 20 to the sulfur settling tank 16.

[0053] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for evaluating the performance and loss of desulfurizing agents based on the complexed iron method, characterized in that, It includes an air intake module, a desulfurization module, a desulfurizing agent regeneration module, a sulfur precipitation module, and a desulfurizing agent self-circulation module connected in sequence, and also includes a monitoring module, a central control module that is communicatively connected to the monitoring module, and an exhaust gas treatment module that is connected to the desulfurization module. The desulfurization module adopts a desulfurization tower (1); the desulfurization tower (1) includes an air inlet, an air outlet, a desulfurizing agent inlet, and a desulfurizing agent outlet; the air inlet module is connected to the air inlet of the desulfurization module, the desulfurizing agent outlet of the desulfurization module is connected to the desulfurizing agent regeneration module, the desulfurizing agent inlet of the desulfurization module is connected to the desulfurizing agent self-circulation module, and the air outlet of the desulfurization module is connected to the tail gas treatment module; The monitoring module includes a first hydrogen sulfide online analyzer (2), a first desulfurization liquid detection port (3), a second pressure gauge (4), a second hydrogen sulfide online analyzer (5), and a second desulfurization liquid detection port (6); The tail gas treatment module adopts a tail gas absorption device (19), and the first inlet of the tail gas absorption device (19) is connected to the outlet of the desulfurization tower (1). The central control module adopts a control monitor (7) with a display screen. The first hydrogen sulfide online analyzer (2), the first desulfurization liquid detection port (3), the pressure gauge (4), the second hydrogen sulfide online analyzer (5), and the second desulfurization liquid detection port (6) are all connected to the control monitor (7).

2. The apparatus for evaluating the performance and loss of desulfurizing agents based on the complexed iron method according to claim 1, characterized in that, The air intake module includes an air intake device (8), a gas mixing tank (9), and a second flow meter (10) connected in sequence. The flow meter (10) is connected to the air inlet of the desulfurization tower (1). The first hydrogen sulfide online analyzer (2) is located between the gas mixing tank (9) and the air inlet of the desulfurization tower (1).

3. The apparatus for evaluating the performance and loss of desulfurizing agents based on the complexed iron method according to claim 2, characterized in that, The air intake device (8) includes a hydrogen sulfide channel, a nitrogen channel and a carbon dioxide channel, all of which are connected to the gas mixing tank (9). The hydrogen sulfide channel, nitrogen channel and carbon dioxide channel each include a ball valve (81), a solenoid valve (82), a first pressure gauge (83), a first flow meter (84), a needle valve (85) and a check valve (86) connected in sequence.

4. The apparatus for evaluating the performance and loss of desulfurizing agents based on the complexed iron method according to claim 1, characterized in that, The first desulfurization liquid detection port (3) is located on one side of the desulfurization tower (1).

5. The apparatus for evaluating the performance and loss of desulfurizing agents based on the complexed iron method according to claim 1, characterized in that, The second pressure gauge (4) and the second hydrogen sulfide online analyzer (5) are located between the outlet of the desulfurization tower (1) and the tail gas absorption device (19).

6. The apparatus for evaluating the performance and loss of desulfurizing agents based on the complexed iron method according to claim 1, characterized in that, The desulfurizing agent regeneration module includes a first liquid circulation pump (11), a regeneration reaction tank (12), an air pump (13), a third flow meter (14), and a gas diffuser (15). The first liquid circulation pump (11) is connected to the desulfurizing agent outlet of the desulfurization tower (1), the first inlet of the regeneration reaction tank (12) is connected to the first liquid circulation pump (11), the air pump (13) and the third flow meter (14) are connected to the second inlet of the regeneration reaction tank (12) in sequence, and the gas diffuser (15) is disposed inside the regeneration reaction tank (12).

7. The apparatus for evaluating the performance and loss of desulfurizing agents based on the complexed iron method according to claim 6, characterized in that, The sulfur precipitation module includes a sulfur settling tank (16) and a liquid inlet device (20). The liquid inlet device (20) is connected to the first inlet of the sulfur settling tank (16) and is communicatively connected to the control monitor (7). The first outlet of the regeneration reaction tank (12) is connected to the second inlet of the sulfur settling tank (16) and the second outlet of the regeneration reaction tank (12) is connected to the second inlet of the tail gas absorption device (19). The second desulfurization liquid detection port (6) is located on one side of the sulfur settling tank (16).

8. The apparatus for evaluating the performance and loss of desulfurizing agents based on the complexed iron method according to claim 7, characterized in that, The desulfurizing agent self-circulation module includes a second liquid circulation pump (17) and an inlet nozzle (18) connected in sequence. The inlet of the second liquid circulation pump (17) is connected to the outlet of the sulfur settling tank (16), and the outlet of the inlet nozzle (18) is connected to the desulfurizing agent inlet of the desulfurization tower (1).

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