Absorption tower desulfurization effect influence factor evaluation device and evaluation method

Abstract

The invention discloses an evaluation device and an evaluation method for influence factors of a desulfurization effect of an absorption tower. The evaluation device comprises an absorption tower treatment module, and an inlet of the absorption tower treatment module is connected with a feed gas pipeline; the desulfurizing agent filling module is used for filling a desulfurizing agent into the absorption tower treatment module; one hydrogen sulfide detection mechanism is used for detecting the hydrogen sulfide content of the raw material gas in the raw material gas pipeline, and the other hydrogen sulfide detection mechanism is used for detecting the hydrogen sulfide content of the gas treated by the absorption tower treatment module; the influence of the structural characteristics of the absorption tower processing module and the filling parameters of the desulfurizing agent on the sulfur capacity is obtained. The method has the beneficial effects that the influence of different structural characteristics and filling parameters on the sulfur capacity is obtained under the actual field condition, and then the structural characteristics and the filling parameters which are influence factors of the desulfurization effect of the absorption tower are determined.

Description

Technical Field

[0001] This invention relates to the field of natural gas desulfurization technology, specifically to an evaluation device and method for evaluating the factors affecting the desulfurization effect of absorption towers. Background Technology

[0002] For desulfurization of natural gas with low latent sulfur content, a non-regenerative liquid desulfurization process, namely triazine solution desulfurization, is adopted. Triazine solution, as a novel desulfurization agent, removes hydrogen sulfide through an irreversible chemical reaction upon contact with natural gas. Its desulfurization products are non-toxic and harmless and can be directly reinjected into the formation, offering significant economic and technical advantages. The triazine solution desulfurization process mainly includes two methods: absorption tower treatment and direct pipeline injection. The absorption tower treatment process is suitable for desulfurization at stations without gas collection pipelines.

[0003] Currently, there is very little research on the factors affecting the desulfurization effect of absorption tower treatment processes. Most studies on the factors affecting the desulfurization effect are limited to simple laboratory simulation analysis, which involves placing desulfurizing agent samples into experimental vessels for experiments. The study only investigates the effect of desulfurizing agents on the desulfurization effect, and the conclusions are mostly predicted through theoretical calculations, which cannot objectively and comprehensively evaluate the factors affecting the desulfurization effect. Summary of the Invention

[0004] The technical problem to be solved by this invention is currently only studied in the laboratory to investigate the effect of desulfurizing agents on desulfurization effect. The purpose is to provide an evaluation device and method for evaluating the factors affecting the desulfurization effect of absorption towers. This method can obtain the influence of the structural characteristics of the equipment and the desulfurizing agent injection parameters on the sulfur capacity under objective and real field conditions, and thus clarify which structural characteristics and injection parameters are the factors affecting the desulfurization effect of absorption towers.

[0005] This invention is achieved through the following technical solution:

[0006] An evaluation device for factors affecting the desulfurization effect of an absorption tower includes: an absorption tower treatment module, the inlet of which is connected to a raw gas pipeline; a desulfurizing agent injection module for injecting desulfurizing agent into the absorption tower treatment module; and two hydrogen sulfide detection mechanisms, one for detecting the hydrogen sulfide content in the raw gas in the raw gas pipeline and the other for detecting the hydrogen sulfide content in the gas treated by the absorption tower treatment module, to obtain the structural characteristics of the absorption tower treatment module and the desulfurizing agent injection parameters affecting sulfur capacity.

[0007] The present invention, employing the above-described scheme, sets up an absorption tower processing module and connects it to the raw gas pipeline. Two hydrogen sulfide detection devices are installed: one detects the hydrogen sulfide content of the raw gas before treatment by the absorption tower module, and the other detects the hydrogen sulfide content of the gas after treatment by the absorption tower module. Since the raw gas pipeline is directly connected to the wellhead, and the raw gas in the well is transported through the pipeline, connecting the absorption tower processing module to the pipeline allows for the acquisition of corresponding desulfurization data under objective and realistic on-site conditions. Furthermore, by changing the equipment structure characteristics and desulfurizing agent injection parameters of the absorption tower processing technology, the structural characteristics of the equipment and the desulfurizing agent injection parameters affecting sulfur capacity can be obtained. This clarifies which structural characteristics and injection parameters are influencing the desulfurization effect of the absorption tower, facilitating the development of optimal process schemes for the actual on-site conditions and reducing the production cost of natural gas desulfurization.

[0008] In some embodiments, the hydrogen sulfide detection mechanism includes an inlet online hydrogen sulfide detector and an outlet online hydrogen sulfide detector. The outlet of the absorption tower processing module is connected to the exhaust pipeline, and the inlet online hydrogen sulfide detector is connected to the raw material gas pipeline. A regulating valve A is connected to the raw material gas pipeline to regulate the flow rate of the raw material gas. By installing an inlet online hydrogen sulfide detector on the raw material gas pipeline, the hydrogen sulfide content of the raw material gas in the pipeline when it passes through the online hydrogen sulfide detector is obtained. The regulating valve A on the raw material gas pipeline is used to regulate the flow rate of the raw material gas entering the absorption tower, facilitating the testing of the impact of the raw material gas flow rate on the desulfurization effect.

[0009] In some embodiments, the injection module includes a desulfurizing agent storage tank, a desulfurizing agent injection pipeline, and a centrifugal pump. The inlet of the desulfurizing agent storage tank is connected to the desulfurizing agent injection pipeline, and the outlet is connected to the absorption tower treatment module via the injection pipeline. A first metering pump is installed on the injection pipeline, and the centrifugal pump is connected to the desulfurizing agent injection pipeline. A desulfurizing agent storage tank is set up and connected to the desulfurizing agent injection pipeline. The centrifugal pump delivers desulfurizing agent into the desulfurizing agent storage tank through the desulfurizing agent injection pipeline. By adjusting the concentration of the desulfurizing agent, the effect of different concentrations of desulfurizing agent on the desulfurization effect can be studied, or the type of desulfurizing agent used can be changed to study the effect of different types of desulfurizing agent on the desulfurization effect. The outlet of the desulfurizing agent storage tank is connected to the absorption tower treatment module via the injection pipeline, facilitating the injection of desulfurizing agent from the storage tank into the absorption tower treatment module. The first metering pump also controls the dosage of the desulfurizing agent, facilitating the study of the effect of different amounts of desulfurizing agent on the desulfurization effect.

[0010] In some embodiments, the absorption tower processing module includes an absorption tower, desulfurizing agent nozzles, a mist eliminator, and a packing layer. The packing layer, desulfurizing agent nozzles, and mist eliminator are all installed inside the absorption tower. The packing layer and desulfurizing agent nozzles are detachably connected to the absorption tower. The mist eliminator is connected to the top outlet of the absorption tower, and the desulfurizing agent nozzles are connected to the injection pipeline. Detachably connecting the packing layer inside the absorption tower facilitates the replacement of different types of packing layers to study the impact of different types of packing layers on the desulfurization effect. Similarly, detachably connecting the desulfurizing agent nozzles inside the absorption tower facilitates the replacement of different types of nozzles to study the impact of different types of nozzles on the desulfurization effect.

[0011] In some embodiments, three sampling ports are provided on the side wall of the absorption tower. These three sampling ports are arranged at intervals along the height of the packing layer. Each of the three sampling ports is connected to an online hydrogen sulfide detector at the outlet via an instrument pipeline to obtain the hydrogen sulfide content of the output gas from any sampling port. Providing three sampling ports on the side wall of the absorption tower, each connected to a packing layer of different heights, facilitates the detection of the impact of different packing layer heights on the desulfurization effect.

[0012] In some embodiments, a desulfurizing agent circulation pipeline is connected to the absorption tower. The two ends of the circulation pipeline are connected to the bottom of the absorption tower and the injection pipeline, respectively. A second metering pump and a pressure gauge C are installed on the circulation pipeline. Because triazine desulfurizing agent is expensive, its usage significantly impacts the cost of natural gas desulfurization. Therefore, the desulfurizing agent circulation pipeline is installed to allow unreacted desulfurizing agent to re-enter the absorption tower for further reaction, thus recycling the desulfurizing agent, reducing its usage, and saving costs.

[0013] In some embodiments, the absorption tower processing module further includes a level gauge, a differential pressure gauge, and a level transmitter. The level gauge and level transmitter are respectively installed on the absorption tower, and the level transmitter is interlocked with the regulating valve C. Thus, by installing a level gauge and a level transmitter on the absorption tower, detecting the liquid level on-site through the level gauge, and interlocking the level transmitter with the regulating valve, automatic liquid drainage is achieved.

[0014] This invention also provides a method for evaluating the influencing factors of the desulfurization effect of an absorption tower. Based on the aforementioned evaluation device for the influencing factors of the desulfurization effect of the absorption tower, the method includes operating the absorption tower processing structure, changing the injection parameters of the desulfurizing agent injection module and changing the structural features of the absorption tower processing module, detecting the hydrogen sulfide content in the raw gas pipeline and the gas in the instrument pipeline corresponding to at least one injection parameter of the desulfurizing agent injection module, or detecting the hydrogen sulfide content in the raw gas pipeline and the gas in the instrument pipeline corresponding to at least one structural feature of the absorption tower processing module, or detecting the hydrogen sulfide content in the raw gas pipeline and the gas in the instrument pipeline corresponding to at least one injection parameter of the desulfurizing agent injection module and the structural features of at least one absorption tower processing module, and obtaining the corresponding sulfur capacity through calculation, thereby verifying the influence of the structural features of the absorption tower processing module and the desulfurizing agent injection parameters of the desulfurizing agent injection module on the sulfur capacity.

[0015] The present invention, employing the above-described scheme, operates an absorption tower treatment structure connected to the raw gas pipeline to detect the hydrogen sulfide content of the raw gas in the pipeline (untreated) and the hydrogen sulfide content of the outlet pipeline (raw gas treated by the absorption tower treatment structure). It studies the influence of at least one structural feature on sulfur capacity, or the influence of at least one injection parameter on sulfur capacity, or the influence of a combination of at least one structural feature and at least one injection parameter on sulfur capacity. This allows for the determination of the influence of each injection parameter and structural feature on sulfur capacity under the absorption tower treatment process conditions. This facilitates the development of the optimal absorption tower treatment scheme based on the influencing factors and actual on-site conditions, thereby reducing the production cost of natural gas desulfurization.

[0016] In some embodiments, the calculation formula is: Sulfur capacity = (Hydrogen sulfide content monitored online before desulfurization - Hydrogen sulfide content monitored online after desulfurization) * Natural gas flow rate / Desulfurizing agent mass; where, desulfurizing agent mass = desulfurizing agent density * desulfurizing agent volume, and desulfurizing agent volume = first metering pump reading * time t. Based on the above calculation formula, the sulfur capacity under corresponding parameters is obtained, and the influencing factors of various injection parameters and structural characteristics on the sulfur capacity under the absorption tower treatment process conditions are obtained.

[0017] In some embodiments, the dispensing parameters of the desulfurizing agent dispensing module include desulfurizing agent type, desulfurizing agent concentration, and desulfurizing agent dispensing amount. By adjusting at least one of the desulfurizing agent type, desulfurizing agent concentration, and desulfurizing agent dispensing amount, the sulfur capacity under the corresponding parameters can be obtained, thereby identifying the factors affecting the sulfur capacity.

[0018] In some embodiments, the parameters of the absorption tower include the packing layer height, the desulfurizing agent nozzle type, and the packing layer type. By adjusting at least one of the packing layer height, the desulfurizing agent nozzle type, or the packing layer type, the sulfur capacity under the corresponding parameters can be obtained, thereby identifying the factors affecting the sulfur capacity.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. By directly installing the absorption tower treatment equipment on the raw gas pipeline, different influencing factors (including different structural features and different injection parameters) can be easily replaced under actual on-site conditions. This allows for obtaining the impact of different structural features and injection parameters on sulfur capacity, thereby clarifying which structural features and injection parameters are the influencing factors of the absorption tower's desulfurization effect. This facilitates the development of the optimal process scheme based on the actual on-site working conditions, thereby reducing the production cost of natural gas desulfurization.

[0021] 2. Experimentally study the factors affecting the desulfurization effect under the absorption tower treatment process conditions, and comprehensively consider the injection parameters to select the optimal treatment process equipment and reduce production costs.

[0022] 3. By setting regulating valves to adjust the flow rate of raw gas, the influence of different flow rates on the desulfurization effect can be experimentally studied. Taking into account the structure of the absorption tower treatment process equipment, an equipment structure and injection parameters with good desulfurization effect and low production cost can be obtained.

[0023] 4. Design a desulfurizing agent dosing module to study the influence of desulfurizing agent dosing amount, different concentrations of the same type of desulfurizing agent, and different types of desulfurizing agents on sulfur capacity. By comprehensively considering the absorption tower treatment process equipment, we can obtain equipment structure and dosing parameters with good desulfurization effect and low production cost.

[0024] 5. The design of the absorption tower treatment module allows for experimental research on the influence of nozzle type and different height packing layers on the desulfurization effect. By comprehensively considering the injection parameters, an equipment structure and injection parameters with excellent desulfurization effect and low production cost can be obtained. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] In the picture:

[0027] Figure 1 This is a flowchart illustrating the process principle of the present invention;

[0028] Figure 2 This is a schematic diagram of the absorption tower treatment module in this invention;

[0029] Figure 3 This is a schematic diagram of the desulfurizing agent injection module in this invention.

[0030] The attached diagram shows the markings and corresponding component names:

[0031] Raw material gas pipeline 1, inlet ball valve 101, ball valve A 102, inlet online hydrogen sulfide detector 103, ball valve B 104. Regulating valve A105. First flow meter 106. Ball valve D301. Shut-off valve D302. Ball valve E303. Online hydrogen sulfide detector at outlet 304. Outlet ball valve E305. Desulfurizing agent filling module 4. Desulfurizing agent storage tank 401. Desulfurizing agent filling pipeline 402. Filter screen 404. Ball valve C403. Centrifugal pump 405. Check valve 406. Shut-off valve F407. Breathing valve 408. Level gauge D411. Drain valve 412. Ball valve G403. Ball valve M409. Ball valve N410. Filling pipeline 501. Ball valve H502. Filter 503. First metering pump 504. Pressure gauge A505. Check valve A506. Ball valve I507. Absorption tower treatment module 2. Ball valve F211, ball valve U212, ball valve V214, ball valve W215, ball valve X217, ball valve Z218, ball valve L222, filter screen 223, second metering pump 224, pressure gauge C225, ball valve R226, manhole 227, absorption tower 201, desulfurizing agent nozzle 202, mist eliminator 203, packing layer 204, sampling port A205, sampling port B207, sampling port C209, stop valve A206, stop valve B208, stop valve C210, level transmitter 219, level gauge A213, differential pressure gauge 216, drain valve 220, desulfurizing agent circulation pipeline 221, exhaust pipeline 3, drain pipeline 6, regulating valve C602, ball valve Y601, instrument pipeline 7. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0033] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0034] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] In the description of this invention, the terms "front," "rear," "left," "right," "up," "down," "vertical," "horizontal," "high," "low," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0036] The terms "first," "second," etc., used in this invention are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

[0037] Existing triazine desulfurizers are expensive, and significant discrepancies have been found between data obtained from laboratory desulfurization treatments and data directly detected in actual on-site production. Furthermore, various factors (including process structure and different desulfurizers) affect desulfurization efficiency. Therefore, this invention involves setting up an on-site desulfurization process structure for testing. It was also found that for absorber tower processes, factors influencing desulfurization efficiency may include: natural gas quality conditions, temperature, pressure, gas flow rate, desulfurizer dosage, packing layer height, nozzle type, and desulfurizer type / concentration. Therefore, this invention, through the following embodiments, studies the influence of the above-mentioned factors on desulfurization efficiency in absorber tower processes, thereby enabling the selection of the most appropriate desulfurizer type / concentration, absorber equipment selection and manufacturing, and desulfurizer dosage when formulating process structures and dosage schemes.

[0038] In order to accurately obtain the factors affecting the desulfurization effect, this application provides the following embodiments.

[0039] Example 1

[0040] This embodiment provides a device for evaluating the factors affecting the desulfurization effect of an absorption tower. (See also...) Figures 1-3 The system includes: an absorption tower processing module 2, whose inlet is connected to the raw gas pipeline 1; a desulfurizing agent injection module 4, used to inject desulfurizing agent into the absorption tower processing module 2; and two hydrogen sulfide detection mechanisms, one for detecting the hydrogen sulfide content in the raw gas in the raw gas pipeline 1 and the other for detecting the hydrogen sulfide content in the gas processed by the absorption tower processing module 2, to obtain the influence of the structural characteristics of the absorption tower processing module and the desulfurizing agent injection parameters on the sulfur capacity. Connecting the absorption tower processing module 2 to the raw gas pipeline 1 allows for the acquisition of corresponding desulfurization data under objective and realistic on-site conditions. Furthermore, by changing the equipment structural characteristics and desulfurizing agent injection parameters of the absorption tower processing process, the influence of these parameters on the sulfur capacity can be obtained, clarifying which structural characteristics and injection parameters are influencing factors of the absorption tower's desulfurization effect. This facilitates the development of optimal process schemes for specific on-site conditions, reducing the production cost of natural gas desulfurization.

[0041] Specifically, see Figures 1-3 The inlet of the absorption tower processing module 2 is connected to the raw gas pipeline 1. An inlet ball valve 101 is connected to the raw gas pipeline 1. A ball valve A102 is connected to the pipeline that connects the raw gas pipeline 1 to the inlet online hydrogen sulfide detector 103. An exhaust pipeline 3 is provided at the outlet of the absorption tower processing module 2. A branch pipe is provided on the exhaust pipeline 3 and connected to the outlet online hydrogen sulfide detector 304. A shut-off valve D302 and a ball valve E303 are connected to the branch pipe. An outlet ball valve 305 is provided on the exhaust pipeline 3.

[0042] When working, see Figure 1 The sulfur-containing natural gas passes through the inlet ball valve 101, and then through the online hydrogen sulfide detector 103 to detect the hydrogen sulfide content of the natural gas (raw material gas) in real time. It then passes through the ball valve B104, the regulating valve A105 (to regulate the flow rate of the raw material gas), and the first flow meter 106 (to accurately measure the flow rate of the raw material gas) in sequence into the absorption tower processing module 2. The gas is desulfurized after contacting the added triazine solution in the absorption tower 201. Then, it enters the exhaust pipeline 3 from the top of the absorption tower 201 through the ball valve D301. The online hydrogen sulfide detector 304 at the outlet can monitor the hydrogen sulfide content of the raw material gas after desulfurization in real time. Finally, the gas goes downstream through the outlet ball valve E305.

[0043] See Figures 1-3The absorption tower processing module 2 is connected to the desulfurizing agent injection module 4 via injection pipeline 501. Ball valve H502, filter 503, first metering pump 504, pressure gauge A505, check valve A506, and ball valve I507 are connected in series on injection pipeline 501. The desulfurizing agent is pumped into the top of the absorption tower 201 through the first metering pump 504. The bottom of the absorption tower is connected to a drain pipeline 6, on which ball valve Y601 and regulating valve C602 are connected in series, and then merge into the exhaust pipeline 3. Regulating valve C602 is interlocked with the absorption tower level transmitter 219. When the absorption tower level reaches the high limit, regulating valve C602 automatically opens, achieving automatic drainage. The absorption tower processing module 2 is also connected to an instrument line 7, which can be connected to the online hydrogen sulfide detector 304 at the outlet via ball valve E303.

[0044] See Figure 1 and Figure 2 The absorption tower processing module 2 includes an absorption tower 201, a desulfurizing agent nozzle 202, a mist eliminator 203, a packing layer 204, and a manhole 227. Incoming gas enters from the bottom of the absorption tower 201 through the raw gas pipeline 1. Three sampling ports (205, 207, 209) are set at three heights in the packing layer, which can be connected to the instrument line 7 via shut-off valves (206, 208, 210), and then connected to the online hydrogen sulfide detector 304 at the outlet via ball valve E303 (only one sampling point in the packing layer is detected at a time) to experimentally study the effect of different packing layer heights on the desulfurization effect. The desulfurizing agent nozzle 202 can be replaced by opening the top cover of the absorption tower 201 to experimentally study the effect of different types of nozzles on the desulfurization effect. The manhole 227 can be used to... 7. Replace the packing layer 204 and conduct experiments to study the impact of different types of packing layers on the desulfurization effect; at the same time, the absorber tower 201 is designed with a desulfurizing agent circulation pipeline 221. The desulfurizing agent circulation pipeline 221 is connected in series with ball valve L222, filter screen 223, second metering pump 224, pressure gauge C225, and ball valve R226. The desulfurizing agent may not react completely in the absorber tower 201. By recycling, the amount of desulfurizing agent used can be reduced, saving costs; the bottom of the absorber tower treatment module 2 is connected to the sewage discharge pipeline 6, and there is a sewage discharge valve 220 on the sewage discharge pipeline; the absorber tower treatment module 2 also includes a level gauge A213, a differential pressure gauge 216, and a level transmitter 219. The absorber tower level transmitter 219 is interlocked with the regulating valve C602 to realize automatic liquid discharge.

[0045] See Figure 3The system includes a desulfurizing agent dosing module 4, which comprises a desulfurizing agent storage tank 401, a desulfurizing agent dosing pipeline 402, a ball valve C403, a filter screen 404, a centrifugal pump 405, a check valve 406, a shut-off valve F407, a breather valve 408, a level gauge D411, and a drain valve 412. The desulfurizing agent dosing module 4 supplies desulfurizing agent to the absorption tower 201 via the dosing pipeline 501 and a first metering pump 504. This is to study the impact of different types of desulfurizing agents on the desulfurization effect, to control the desulfurization dosage through the first metering pump 504 (which can accurately measure the amount of desulfurizing agent added), and to investigate the effect of different amounts of desulfurizing agent on the desulfurization effect.

[0046] Example 2

[0047] See Figures 1-3 An evaluation method for factors affecting the desulfurization effect of an absorption tower is proposed. Based on the evaluation device for factors affecting the desulfurization effect of the absorption tower described in Example 1, the method includes operating the absorption tower processing structure, changing the injection parameters of the desulfurizing agent injection module 4 and changing the structural features of the absorption tower processing module 2, detecting the hydrogen sulfide content in the raw gas pipeline 1 and the gas in the instrument pipeline 7 corresponding to at least one injection parameter of the desulfurizing agent injection module 4, or detecting the hydrogen sulfide content in the raw gas pipeline 1 and the gas in the instrument pipeline 7 corresponding to at least one structural feature of the absorption tower processing module 2, or detecting the hydrogen sulfide content in the raw gas pipeline 1 and the gas in the instrument pipeline 7 corresponding to at least one injection parameter of the desulfurizing agent injection module 4 and at least one structural feature of the absorption tower processing module 2, and obtaining the corresponding sulfur capacity through calculation formulas to verify the influence of the structural features of the absorption tower processing module 2 and the desulfurizing agent injection parameters of the desulfurizing agent injection module 4 on the sulfur capacity.

[0048] For specific instructions, please refer to [link / reference]. Figures 1-3 The specific steps are as follows:

[0049] By default, all valves are in the closed state.

[0050] S1: Open ball valve C403 and shut-off valve F407. Inject No. 1 triazine desulfurizer (original solution: water ratio 1:1) into desulfurizer storage tank 401 through desulfurizer injection pipeline 402 using centrifugal pump 405. Open ball valve M409 and ball valve N410. Observe the reading of level gauge D411. Stop injection when the level is appropriate. Close ball valve C403, shut-off valve F407 and centrifugal pump 405.

[0051] S2: Open ball valves H502 and I507, and inject the desulfurizing agent from the desulfurizing agent storage tank 401 into the absorption tower 201 via the first metering pump 504 through the injection pipeline 501. Open ball valves F211, U212, V214, W215, X217, and Z218. Open ball valves L222 and R226 to allow the desulfurizing agent in the tower to flow into the injection pipeline 501 via the second metering pump 224 through the circulation pipeline 221.

[0052] S3: Open ball valve E301 and outlet ball valve E305 on exhaust line 3, and open ball valve 601 on sewage line 6.

[0053] S4: Open the inlet ball valves 101, A102, B104, and A105 on the inlet pipeline. Sulfur-containing natural gas enters the absorption tower 201 to remove hydrogen sulfide. The gas phase flows downstream through the exhaust pipeline 3, while the liquid phase enters the circulation pipeline 221. Open the shut-off valve D302 and ball valve E303. Observe the reading on the online hydrogen sulfide detector 304 at the outlet. Adjust the first metering pump 504 according to actual requirements to control the desulfurizing agent injection amount.

[0054] S5: Stabilize the sulfur-containing natural gas flow rate and desulfurizer injection amount for a certain time t, and record the relevant readings for the corresponding operating conditions, including the readings of the first flow meter 106, the first metering pump 504, the inlet online hydrogen sulfide detector 103, and the outlet online hydrogen sulfide detector 304. Then, calculate the sulfur capacity using the formula: Sulfur capacity = (online monitoring hydrogen sulfide content before desulfurization - online monitoring hydrogen sulfide content after desulfurization) * flow rate / desulfurizer mass, where, desulfurizer mass = desulfurizer density * desulfurizer volume, and desulfurizer volume = first metering pump reading * time t.

[0055] Assuming t is 0.5h, the flow rate of the sulfur-containing natural gas—as displayed by the first flow meter 106—is 0.0833 × 10⁻⁶. 4 m 3 / h, desulfurizing agent injection rate—the first metering pump 504 shows 2L / h; hydrogen sulfide content before desulfurization—the imported online hydrogen sulfide detector 103 shows 300mg / m³. 3 Export online hydrogen sulfide detector 3041 mg / m³ 3 Flow rate = 0.0833 × 10 4 m 3 / h*0.5h=416.5m 3 Desulfurizer volume = 2L / h * 0.5h = 1L, desulfurizer mass = 1.08g / cm³ 3 *1L = 1.08kg. Sulfur capacity = (300-1)mg / m³ 3 *416.5m 3 / 1.08kg=11.53%.

[0056] S6: Conduct multiple sets of experiments, adjust the gas flow rate by regulating valve A105, and study the effect of different flow rates of sulfur-containing natural gas on the desulfurization effect.

[0057] S7: Conduct multiple sets of experiments to study the desulfurization effect of different desulfurizing agent injection amounts by controlling the first metering pump 504.

[0058] S8: Close the shut-off valve D302, switch the sampling port and conduct 3 more sets of tests. Open the shut-off valves (206, 208, 210) connected to the instrument pipeline 7 respectively to test the effect of different height packing layers 204 on the desulfurization effect.

[0059] S9: Close inlet ball valve 101, ball valve B104, and regulating valve A105, then close ball valve H502, first metering pump 504, ball valve I507, ball valve L222, second metering pump 224, ball valve R226, and ball valve D301 to release the remaining gas inside the absorption tower. Open drain valve 220 to drain the residual liquid.

[0060] S10: Open the absorber cover, replace the absorber nozzle 202, repeat S1-S9, and conduct multiple sets of tests to test the effect of different types of nozzles on the desulfurization effect.

[0061] S11: Open manhole 227, replace the absorber tower packing layer 204, repeat S1-S10, conduct multiple sets of tests, and test the effect of different types of packing layers on the desulfurization effect.

[0062] S12: Close the inlet ball valve 101 on the inlet pipeline. After the remaining sulfur-containing natural gas in the unit has been processed, slowly open the vent valve to reduce the internal pressure of the unit to atmospheric pressure. Close all other valves and open the drain valve 220 of the absorption tower and the drain valve 412 of the desulfurizing agent storage tank to drain the residual liquid.

[0063] S13: Change the proportion of No. 1 triazine desulfurizer to other proportions, and repeat S1-S12 with different proportions of No. 2 / No. 3 triazine desulfurizer. Conduct multiple sets of experiments to study the effects of different concentrations and types of the same type of desulfurizer on the desulfurization effect.

[0064] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for evaluating the influencing factors of desulfurization effect in an absorption tower, characterized in that, include: An absorption tower processing module, wherein the inlet of the absorption tower processing module is connected to the raw material gas pipeline; A desulfurizing agent dosing module, which is used to add desulfurizing agent to the absorption tower treatment module; Two hydrogen sulfide detection devices are provided, one of which is used to detect the hydrogen sulfide content of the raw gas from the raw gas pipeline, and the other is used to detect the hydrogen sulfide content of the gas after it has been processed by the absorption tower treatment module.

2. The device for evaluating the influencing factors of desulfurization effect in an absorption tower according to claim 1, characterized in that, The hydrogen sulfide detection mechanism includes an inlet online hydrogen sulfide detector and an outlet online hydrogen sulfide detector. The outlet of the absorption tower processing module is connected to the exhaust pipeline. The inlet online hydrogen sulfide detector is connected to the raw material gas pipeline. A regulating valve A is connected to the raw material gas pipeline to regulate the flow rate of the raw material gas.

3. The device for evaluating the influencing factors of desulfurization effect in an absorption tower according to claim 1, characterized in that, The injection module includes a desulfurizing agent storage tank, a desulfurizing agent injection pipeline, and a centrifugal pump. The inlet of the desulfurizing agent storage tank is connected to the desulfurizing agent injection pipeline, and the outlet is connected to the absorption tower treatment module through the injection pipeline. A first metering pump is installed on the injection pipeline, and the centrifugal pump is connected to the desulfurizing agent injection pipeline.

4. The device for evaluating the influencing factors of desulfurization effect in an absorption tower according to claim 3, characterized in that, The absorption tower processing module includes an absorption tower, a desulfurizing agent nozzle, a mist eliminator, and a packing layer. The packing layer, desulfurizing agent nozzle, and mist eliminator are all installed inside the absorption tower. The packing layer and desulfurizing agent nozzle are detachably connected to the absorption tower. The mist eliminator is connected to the top outlet of the absorption tower, and the desulfurizing agent nozzle is connected to the injection pipeline.

5. The device for evaluating the influencing factors of the desulfurization effect of the absorption tower according to claim 4, characterized in that, The absorption tower has three sampling ports on its side wall. The three sampling ports are arranged at intervals along the height of the packing layer. The three sampling ports are connected to the online hydrogen sulfide detector at the outlet through instrument pipelines to obtain the hydrogen sulfide content of the output gas at any sampling port.

6. The device for evaluating the influencing factors of desulfurization effect in an absorption tower according to claim 4, characterized in that, The absorption tower is connected to a desulfurizing agent circulation pipeline. The two ends of the desulfurizing agent circulation pipeline are connected to the bottom of the absorption tower and the injection pipeline, respectively. A second metering pump and a pressure gauge C are installed on the desulfurizing agent circulation pipeline.

7. The device for evaluating the influencing factors of desulfurization effect in an absorption tower according to claim 4, characterized in that, The absorption tower processing module also includes a level gauge, a differential pressure gauge, and a level transmitter. The level gauge and the level transmitter are respectively installed on the absorption tower, and the level transmitter is interlocked with the regulating valve C.

8. A method for evaluating the factors affecting the desulfurization effect of an absorption tower, characterized in that, The implementation of the absorption tower desulfurization effect influencing factor evaluation device according to any one of claims 1 to 7 includes the following steps: The absorption tower treatment structure is operated, and the charging parameters of the desulfurizing agent charging module and the structural features of the absorption tower treatment module are changed. The hydrogen sulfide content of the raw gas before desulfurization in the raw gas pipeline and the hydrogen sulfide content of the gas after desulfurization in the instrument pipeline are detected for at least one charging parameter of the desulfurizing agent charging module, and / or the hydrogen sulfide content of the raw gas pipeline before desulfurization and the hydrogen sulfide content of the gas after desulfurization in the instrument pipeline are detected for at least one structural feature. The corresponding sulfur capacity is obtained by calculation formula to verify the influence of the structural features of the absorption tower treatment module and the desulfurizing agent charging parameters of the desulfurizing agent charging module on the sulfur capacity.

9. The evaluation method for factors affecting the desulfurization effect of the absorption tower according to claim 8, characterized in that, The calculation formula is: Sulfur capacity = (Hydrogen sulfide content monitored online before desulfurization - Hydrogen sulfide content monitored online after desulfurization) * Natural gas flow rate / Desulfurizing agent mass; Wherein, the mass of desulfurizing agent = density of desulfurizing agent * volume of desulfurizing agent, and the volume of desulfurizing agent = reading of the first metering pump * time t.

10. The evaluation method for factors affecting the desulfurization effect of the absorption tower according to claim 8, characterized in that, The parameters for the desulfurizing agent dosing module include the type of desulfurizing agent, the concentration of desulfurizing agent, and the amount of desulfurizing agent added.

11. The evaluation method for factors affecting the desulfurization effect of the absorption tower according to claim 8, characterized in that, The structural features of the absorption tower include the height of the packing layer, the type of desulfurizing agent nozzle, and the type of packing layer.

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