Combined desulfurization device, test evaluation device and test evaluation method

Abstract

The invention discloses a combined desulfurization device which comprises a raw material gas mixing tank, a raw material gas compressor, a gas buffer tank, an absorption tower I, an absorption tower II, a constant-temperature water bath, an atomization tank, a solution booster pump and a gas liquid separation tank, the input pipe is provided with a first branch pipe connected with the first absorption tower and a second branch pipe connected with the second absorption tower, the first absorption tower is provided with a first output pipe and a second output pipe, the first branch pipe, the second branch pipe, the first output pipe, the second output pipe and the atomization tank are all provided with valves, and the first absorption tower and the second absorption tower are arranged in the constant-temperature water bath. The solution booster pump is connected with the atomization tank through a pipeline; a desulfurizing agent is introduced into the absorption tower I, the absorption tower II and the solution booster pump. The combined desulfurization device has the beneficial effects of multiple desulfurization modes and flexibility in use. The invention further discloses a test evaluation device and a test evaluation method. The test evaluation device and the test evaluation method have the beneficial effects that evaluation is convenient, and the most suitable desulfurization method is quickly selected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical desulfurization, in particular to a combined desulfurization device, a test evaluation device and a test evaluation method. BACKGROUND

[0002] In the process of oil and gas field development, hydrogen sulfide is produced by microbial decomposition of crude oil underground, and hydrogen sulfide can also be produced by high temperature or hydrothermal cracking of organic sulfur in crude oil. When crude oil and gas are separated, a large amount of hydrogen sulfide will enter the gas phase treatment system with natural gas. Hydrogen sulfide is a gas with strong toxicity and irritation, which not only harms the human body and pollutes the environment, but also causes serious corrosion of pipelines and related equipment.

[0003] At present, dry and wet desulfurization processes are mainly selected. Dry desulfurization is usually an iron oxide solid desulfurization process, which requires replacement of the desulfurizer, has high investment and operation cost, complicated operation, and the waste desulfurizer is easy to self-ignite after contacting with air, which increases the difficulty of waste desulfurizer recovery and treatment. Wet desulfurization uses a specific solution or solvent as a desulfurizer to remove hydrogen sulfide from the gas. Compared with dry desulfurization, wet desulfurization has low construction cost and occupies less land, and is especially suitable for single-well natural gas desulfurization. However, the existing desulfurization device has the problem of single desulfurization mode, and it is difficult to select the appropriate desulfurization mode.

[0004] Therefore, the prior art needs to be improved. SUMMARY

[0005] The technical problem to be solved by the present application is that the prior art has a single desulfurization mode, and it is difficult to select the appropriate desulfurization mode. The purpose is to provide a combined desulfurization device, a test evaluation device and a test evaluation method, which uses corresponding technical means, has multiple desulfurization modes, quickly selects the most suitable desulfurization method, and can realize indoor rapid evaluation of the desulfurization effect of the solvent.

[0006] The present application is realized by the following technical solutions:

[0007] A combined desulfurization device, comprising a raw gas mixing tank, a raw gas compressor, a gas buffer tank, an absorption tower one, an absorption tower two, a constant temperature water bath, an atomizing tank, a solution booster pump and a gas distribution tank,

[0008] The raw gas mixing tank, the raw gas compressor and the gas buffer tank are connected in sequence by pipelines,

[0009] The gas buffer tank is provided with an input pipe connected to the atomizing tank, the input pipe is provided with a branch pipe one connected to the absorption tower one and a branch pipe two connected to the absorption tower two, the absorption tower one is provided with an output pipe one connected to the gas distribution tank and an output pipe two connected to the branch pipe two, the absorption tower two and the atomizing tank are connected to the gas distribution tank through pipes respectively,

[0010] The branch pipe one, the branch pipe two, the output pipe one, the output pipe two and the input end of the atomizing tank are provided with valves,

[0011] The absorption tower one and the absorption tower two are arranged in the constant-temperature water bath, the solution booster pump is connected to the atomizing tank through a pipe, and the absorption tower one, the absorption tower two and the solution booster pump are provided with desulfurizing agents.

[0012] Further, in the present application, the absorption tower one and the absorption tower two are provided with a flow dividing mechanism, and the branch pipe one and the branch pipe two are located below the flow dividing mechanism.

[0013] Further, in the present application, the flow dividing mechanism comprises a bubble dividing piece installed in the absorption tower one and the absorption tower two near the bottom, a top center of the bubble dividing piece is provided with an extension pipe extending downward, the branch pipe one and the branch pipe two are connected to the top of the extension pipe, the bubble dividing piece is provided with a plurality of flow dividing holes penetrating up and down, the diameters of the flow dividing holes gradually decrease from inside to outside, the bubble dividing piece comprises a conical cover part and an extension part connected to each other, the extension pipe extends from the conical cover part at the bottom, and the extension part prolongs the moving path of the bubbles in the flow dividing holes.

[0014] Further, in the present application, the flow dividing mechanism further comprises a bubble dividing net installed in the absorption tower one and the absorption tower two, the bubble dividing net is located above the bubble dividing piece, and the aperture of the bubble dividing net is smaller than that of the flow dividing holes.

[0015] Further, in the present application, the absorption tower one and the absorption tower two are both provided with an expansion part, and the expansion part is located above the liquid level of the desulfurizing agent.

[0016] Further, in the present application, the absorption tower one, the absorption tower two and the atomizing tank are connected to a sewage pipe, and the sewage pipe is provided with a valve.

[0017] A test evaluation device comprises the combined desulfurization device, further comprises a flow meter, the flow meter is arranged in the pipeline from the raw material gas mixing tank to the raw material gas compressor, the pipeline from the raw material gas mixing tank to the raw material gas compressor is provided with a raw material gas sampling port, and the output end of the gas distribution tank is provided with a purified gas sampling port.

[0018] Further, in the present application, the raw material gas sampling port and the purified gas sampling port are provided with analyzers.

[0019] Further, in the present application, an atomizing nozzle connected with the solution booster pump is arranged in the atomizing tank, and by selecting different types of atomizing nozzles, the droplet size is adjusted to achieve different droplet fluid distribution, and the relationship between the droplet size, gas velocity and reaction effect under the atomization process is evaluated to determine the optimal reaction balance.

[0020] A test evaluation method using the test evaluation device, further comprising the following method,

[0021] After the sulfur-containing natural gas is fully mixed in the raw material gas mixing tank, it enters the raw material gas compressor from the output end of the raw material gas mixing tank through the pipeline, is metered and sampled by the flow meter and the analyzer before entering the raw material gas compressor, and then the pressure of the sulfur-containing natural gas is raised to not more than 4.0 MPa by the raw material gas compressor, and then the sulfur-containing natural gas enters the gas buffer tank through the pipeline, and then the purified natural gas treated by the absorption tower one / absorption tower two / atomizing tank is sent to the gas separation tank through the pipeline, and then the purified gas is sampled and analyzed from the purified gas sampling port of the output end of the gas separation tank,

[0022] The removal rate of hydrogen sulfide in the sulfur-containing natural gas is calculated by comparing the hydrogen sulfide content of the raw material gas sampling port and the purified gas sampling port, and the sulfur capacity of this test is calculated according to the flow meter, and the desulfurization performance of this test is evaluated.

[0023] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0024] The present application provides a combined desulfurization device, which comprises a raw material gas mixing tank, a raw material gas compressor, a gas buffer tank, an absorption tower one, an absorption tower two, a constant temperature water bath, an atomizing tank, a solution booster pump and a gas separation tank. By controlling the valves, the absorption tower one and the absorption tower two, the atomizing tank can be used for desulfurization respectively, or the absorption tower one and the absorption tower two, the atomizing tank can be used for desulfurization simultaneously, or the absorption tower one and the absorption tower two can be used for desulfurization in series, or the absorption tower one and the absorption tower two can be used for desulfurization in parallel. The combined desulfurization device has multiple desulfurization methods, which is convenient for using the most suitable desulfurization method according to different situations, and has good use effect.

[0025] This invention also provides a test evaluation device and method for a combined desulfurization unit. Before the raw gas enters the compression stage, it is metered and sampled using a flow meter and analyzer. Samples are taken from the purified gas sampling port at the output end of the gas separator. The hydrogen sulfide content at the raw gas sampling port and the purified gas sampling port is compared to calculate the hydrogen sulfide removal rate in the sulfur-containing natural gas. Then, the sulfur capacity of this test is calculated based on the flow meter readings. Finally, the desulfurization performance of the desulfurizing agent in this test is evaluated. After evaluation, the experimental parameters can be changed, and the evaluation can be repeated, which is beneficial for finding the most suitable desulfurization method. Attached Figure Description

[0026] 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 considered 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. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the test evaluation device according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the absorption tower of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the bubble separator of the present invention.

[0030] The attached diagram shows the markings and corresponding component names: 1-Raw gas mixing tank, 101-Branch pipe one, 102-Branch pipe two, 2-Raw gas compressor, 3-Gas buffer tank, 4-Absorption tower one, 401-Output pipe one, 402-Output pipe two, 5-Absorption tower two, 6-Constant temperature water bath, 7-Atomizing tank, 8-Solution booster pump, 9-Gas separator, 10-Input pipe, 11-Diverting mechanism, 1101-Bubble divider, 1102-Diverting orifice, 1103-Bubble divider mesh, 1104-Extension pipe, 12-Valve, 13-Drain pipe, 14-Flow meter, 15-Raw gas sampling port, 16-Purified gas sampling port. Detailed Implementation

[0031] 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.

[0032] The following detailed description of embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of the embodiments of the present invention, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "inner", "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing the present 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, and therefore should not be construed as a limitation of the present invention.

[0035] Furthermore, the terms “one” and “two” are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] In the description of the embodiments of the present invention, "multiple" means at least two.

[0037] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0038] Example 1

[0039] Please refer to Figures 1 to 3 The figure shows a combined desulfurization device according to Embodiment 1 of the present invention, the specific structure of which is as follows.

[0040] Combination Figure 1As shown, the combined desulfurization device in this embodiment mainly consists of nine parts: a raw gas mixing tank 1, a raw gas compressor 2, a gas buffer tank 3, an absorption tower 1 4, an absorption tower 2 5, a constant temperature water bath 6, an atomizing tank 7, a solution booster pump 8, and a gas separator 9. The raw gas mixing tank 1 is used to mix sulfur-containing natural gas evenly; the raw gas compressor 2 is used to increase the gas supply, enabling directional gas delivery; the gas buffer tank 3 is used to buffer high-pressure gas; the absorption towers 1 4, 2 5, and atomizing tank 7 serve as desulfurization sites, through which a desulfurizing agent (such as triazine desulfurization solvent) is introduced to desulfurize the sulfur-containing natural gas, producing purified natural gas; the constant temperature water bath 6 is used to maintain the absorption towers 1 4 and 2 5 at a set temperature; the solution booster pump 8 is used to deliver the desulfurizing agent to the atomizing tank 7; and the gas separator 9 is used to demist the purified natural gas, discharging qualified purified natural gas.

[0041] In some embodiments of this example, the lower part of the raw material gas mixing tank 1 is connected to an inlet pipe, and a valve 12 is installed on the inlet pipe. The top of the raw material gas mixing tank 1 is connected to an outlet pipe that connects to the left inlet end of the raw material gas compressor 2, and a valve 12 is installed on this outlet pipe. The right side of the raw material gas compressor 2 is connected to the lower part of the gas buffer tank 3. A parallel pipe connected to the raw material gas compressor 2 is also installed, and a valve 12 is installed on this parallel pipe. The left end of the parallel pipe connects to the left side of the raw material gas compressor 2, with this connection located downstream of the valve 12 on the outlet pipe; the right end of the parallel pipe connects to the right side of the raw material gas compressor 2, with this connection located upstream of the valve 12 on the outlet pipe. By using the parallel pipe configuration, the raw material gas compressor 2 may not need to operate in certain situations.

[0042] Combination Figure 1 As shown, the constant temperature water bath 6 is constructed with cement or a metal box. Absorption tower 1 4 and absorption tower 2 5 are both installed inside the constant temperature water bath 6. The water in the constant temperature water bath 6 is at least above the liquid level of the desulfurizing agent inside absorption tower 1 4 and absorption tower 2 5.

[0043] Furthermore, such as Figure 1 As shown, an input pipe 10 is connected to the top of the gas buffer tank 3, and the end of the input pipe 10 is connected to the left inlet of the atomizing tank 7. A valve 12 is installed on the side of the input pipe 10 near the gas buffer tank 3, and another valve 12 is installed on the side of the input pipe 10 near the atomizing tank 7. A branch pipe 101 and a branch pipe 102 are connected to the input pipe 10 between the two valves 12. The branch pipe 101 is located upstream of the branch pipe 102.

[0044] Reference Figure 1As shown, the right end of branch pipe 101 is connected to the inlet end of the lower part of absorption tower 4, and the inlet end is located below the liquid surface of the desulfurizing agent inside. A valve 12 is installed on branch pipe 101. The right end of branch pipe 102 is connected to the inlet end of the lower part of absorption tower 5, and the inlet end is located below the liquid surface of the desulfurizing agent inside. A valve 12 is also installed on branch pipe 102.

[0045] Furthermore, such as Figure 1 As shown, the top of absorption tower 4 is connected to an output pipe 401, which is connected to the lower inlet of gas separator 9. A valve 12 is installed on the side of output pipe 401 near absorption tower 4, and another valve 12 is installed on the side of output pipe 401 near gas separator 9. An outlet pipe is installed at the top of absorption tower 5, with a valve 12 installed on it. This outlet pipe connects to output pipe 401 to achieve communication and transport with gas separator 9. The connection point is located between the two valves 12 on output pipe 401. An outlet pipe is also installed at the top of atomizing tank 7, with a valve 12 installed on it. This outlet pipe connects to output pipe 401 to achieve communication and transport with gas separator 9. The connection point is located between the two valves 12 on output pipe 401.

[0046] In some embodiments of this example, to enable adjustable series and parallel operation of absorption tower 4 and absorption tower 5, an output pipe 2 402 is also installed. The upper end of output pipe 2 402 is connected to output pipe 1 401, and the lower end of output pipe 2 402 is connected to branch pipe 2 102. This connection is located downstream of valve 12 on branch pipe 2 102. Valve 12 is installed on output pipe 2 402. Furthermore, a valve 12 is also installed on output pipe 1 401, which is located between output pipe 2 402 and the outlet pipe of absorption tower 2 5.

[0047] It should be noted that different combined working modes can be achieved by controlling each valve 12.

[0048] For example, if only the absorption tower 4 is working, all valves 12 of branch pipe 101 and output pipe 401 are open, valves 12 of branch pipe 2 102 and output pipe 2 402 are closed, and valve 12 on the input pipe 10 near the atomizing tank 7 is also closed.

[0049] For example, if only the absorption tower 2 5 is working, the valves 12 of branch pipe 1 101 and output pipe 2 402 are closed, the two valves 12 on the left side of output pipe 1 401 are closed, the valve 12 on the right side of branch pipe 2 102 and output pipe 1 401 is open, and the valve 12 on the input pipe 10 near the atomizing tank 7 is also closed.

[0050] For example, if only the atomizer 7 is working, all valves 12 on the input pipe 10 are open, valves 12 on branch pipe 101, branch pipe 2 102, and output pipe 2 402 are closed, valve 12 on the outlet pipe of absorption tower 2 5 is closed, and the two valves 12 on the left side of output pipe 1 401 are closed and one valve 12 on the right side is open.

[0051] For example, when absorption tower 1 (4) and absorption tower 2 (5) are connected in series, valves 12 on branch pipe 1 (101) and output pipe 2 (402) are opened, one valve 12 on the left and one valve 12 on the right of output pipe 1 (401) are opened, one valve 12 in the middle of output pipe 1 (401) is closed, and valve 12 on branch pipe 2 (102) is closed.

[0052] For example, when absorption tower 1 (4) and absorption tower 2 (5) are connected in parallel, valve 12 on branch pipe 1 (101) and branch pipe 2 (102) is opened, valve 12 on output pipe 1 (401) is opened, and valve 12 on output pipe 2 (402) is closed.

[0053] In some implementations of this embodiment, such as Figure 1 As shown, a desulfurizing agent delivery pipeline is connected to the left side of the solution booster pump 8, and a valve 12 is installed on this pipeline. A pipeline with a valve 12 is connected to the right side of the solution booster pump 8, and this pipeline is connected to the atomizing tank 7. After being pressurized, the desulfurizing agent is delivered into the atomizing tank 7 via the solution booster pump 8. A purified natural gas output pipe is connected to the top of the gas separator 9, and a valve 12 is installed on the purified natural gas output pipe. A nitrogen pipeline is connected to the purified natural gas output pipe, located upstream of the valve 12 on the purified natural gas output pipe, and a valve 12 is also installed on the nitrogen pipeline.

[0054] In some embodiments of this example, the bottom of absorption tower 4, absorption tower 5, and atomizing tank 7 are connected to a drain pipe 13. The drain pipe 13 is equipped with three valves 12, which control the discharge of wastewater from absorption tower 4, absorption tower 5, and atomizing tank 7, respectively. Desulfurizing agent can also be replenished to absorption tower 4, absorption tower 5, and atomizing tank 7 through the drain pipe 13, making desulfurization agent replacement very convenient.

[0055] It should be noted that, in combination Figure 1 and Figure 2 As shown, the upper parts of absorber towers 4 and 5 have been enlarged, and this enlarged section is called the expansion section. The expansion is located above the surface of the triazine desulfurizing agent solution, for example, at a position approximately two-thirds or more above the height of absorber towers 4 and 5. The maximum diameter of the expansion section is approximately 1.2-1.5 times the tower diameter. This enlargement design effectively prevents the triazine desulfurizing agent solution from being blown out of absorber towers 4 and 5 into the top pipe due to excessive raw gas velocity, thus avoiding loss of the triazine desulfurizing agent solution and improving the accuracy of the test data.

[0056] In some implementations of this embodiment, combined with Figure 2 and Figure 3 As shown, absorption tower 4 and absorption tower 5 are equipped with a flow splitting mechanism 11. The flow splitting mechanism 11 includes two parts: a bubble splitter 1101 and a bubble splitting mesh 1103. The bubble splitting mesh 1103 is located on the upper side of the bubble splitter 1101, and the gas outlets of branch pipe 101 and branch pipe 2 102 are located on the lower side of the bubble splitter 1101.

[0057] Furthermore, in combination Figure 2 and Figure 3 As shown, the bubble divider 1101 includes an interconnected conical shroud and an extension, with the extension located on the upper side of the conical shroud. The bubble divider 1101 is positioned near the bottom of absorption tower 4 and absorption tower 5 to fully utilize the desulfurizing agent at the bottom and reduce waste. The conical shroud resembles a cone with an internal conical cavity that is wider at the bottom and narrower at the top. An extension pipe 1104 is installed at the center of the bubble divider 1101, with its top located at the top of the bubble divider 1101 and its bottom extending from the bottom of the conical shroud. Branch pipe 2 102 and branch pipe 101 extend into the ends of absorption tower 5 and absorption tower 4 and connect to the top of the extension pipe 1104. Gas (in the form of bubbles) ejected from the extension pipe 1104 is positioned below the bubble divider 1101, agitating the desulfurizing agent below the bubble divider 1101 for thorough desulfurization and to prevent waste of the desulfurizing agent.

[0058] The bubble divider 1101 has multiple vertically penetrating diversion holes 1102. The extension is cylindrical, and the diversion holes 1102 penetrate the conical cover and the extension. The extension increases the movement path of the bubbles within the diversion holes 1102, preventing the newly divided bubbles from immediately collapsing, resulting in a better bubble division effect. The diameter of the diversion holes 1102 on the bubble divider 1101 gradually decreases from the inside to the outside, and the bottom of the bubble divider 1101 is a concave conical surface. Because the bubbles ejected from the extension tube 1104 will spread out, there are more bubbles in the outer ring and fewer bubbles in the inner ring. The flow divider 1102 that contacts the outer ring separates a portion of the bubbles, while the remaining bubbles converge towards the center along the conical surface. This ensures that the sulfur-containing natural gas sprayed onto the bubble divider 1101 diffuses as much as possible to all the flow dividers 1102, completing the flow division. This allows the fine bubbles to be evenly distributed in the desulfurizing agent on the upper layer of the bubble divider 1101, fully contacting the desulfurizing agent on the upper layer of the bubble divider 1101, thus achieving a better desulfurization effect.

[0059] The pores of the bubble separator 1103 are smaller than those of the diversion holes 1102, further improving the separation effect.

[0060] Example 2

[0061] The test evaluation device in this embodiment is an improvement based on the combined desulfurization device of Embodiment 1. It includes a flow meter 14 and an analyzer, such as... Figure 1 As shown, flow meter 14 is installed on the pipeline from raw gas mixing tank 1 to raw gas compressor 2. Raw gas sampling port 15 is also located on the pipeline from raw gas mixing tank 1 to raw gas compressor 2, with flow meter 14 located upstream of raw gas sampling port 15. Purified gas sampling port 16 is located on the purified natural gas output pipe connected to the output end of gas separator 9. Both purified gas sampling port 16 and raw gas sampling port 15 are equipped with analyzers. The analyzers are existing gas analysis instruments for measuring sulfur content.

[0062] The atomizing canister 7 is detachably connected to an atomizing nozzle. The atomizing nozzle and the solution booster pump 8 are connected by a pipeline. By selecting different models of atomizing nozzles, the droplet size can be adjusted to achieve different droplet fluid distributions. The relationship between droplet size, gas velocity and reaction effect under the atomization process can be evaluated to determine the optimal droplet fluid distribution state and the optimal reaction equilibrium relationship.

[0063] Example 3

[0064] This embodiment provides a test evaluation method, which uses the test evaluation device of Embodiment 2, and further includes the following methods.

[0065] After being thoroughly mixed in the feed gas mixing tank 1, the sulfur-containing natural gas flows from the output end of the mixing tank 1 into the feed gas compressor 2 via a pipeline. Before entering the compressor 2, it is measured and sampled by a flow meter 14 and an analyzer. The compressor 2 then increases the pressure of the sulfur-containing natural gas to no more than 4.0 MPa, for example, 4.0 MPa or 3.5 MPa. The gas then flows through a pipeline into the gas buffer tank 3, and after exiting the buffer tank 3, it enters the input pipe 10. After flowing through branch pipe 101 / branch pipe 102, it enters the absorption tower 4. The natural gas is desulfurized by absorption tower 2 (5) or directly fed into atomizer 7 via input pipe 10. The purified natural gas after treatment by absorption tower 1 (4), absorption tower 2 (5), and atomizer 7 is sent to gas separator 9 through pipeline. Samples are taken from purified gas sampling port 16 at the output end of gas separator 9 for analysis. The hydrogen sulfide content is compared with that at raw material gas sampling port 15 and purified gas sampling port 16 to calculate the removal rate of hydrogen sulfide in sulfur-containing natural gas. The sulfur capacity of this test is then calculated based on flow meter 14 to evaluate the desulfurization performance of this test (e.g., excellent, good, passable, poor).

[0066] After evaluation, experimental parameters can be changed, such as selecting different types of atomizing nozzles, adjusting droplet size, adjusting the series-parallel operation of absorption tower 4 and absorption tower 5, and adjusting the water bath temperature of the constant temperature water bath 6, etc., to conduct evaluation again. Using only one set of equipment allows for the evaluation of multiple desulfurization methods, facilitating the rapid identification of the most suitable desulfurization method.

[0067] In summary, embodiments of the present invention provide a combined desulfurization device, comprising a raw gas mixing tank 1, a raw gas compressor 2, a gas buffer tank 3, an absorption tower 1 4, an absorption tower 2 5, a constant temperature water bath 6, an atomizing tank 7, a solution booster pump 8, and a gas separator 9. The raw gas mixing tank 1, the raw gas compressor 2, and the gas buffer tank 3 are connected sequentially via pipelines. The gas buffer tank 3 is provided with an input pipe 10 connecting to the atomizing tank 7. The input pipe 10 is provided with a branch pipe 101 connecting to the absorption tower 1 4 and a branch pipe 102 connecting to the absorption tower 2 5. Absorption tower 4 is equipped with an output pipe 401 connected to the gas separator 9 and an output pipe 402 connected to a branch pipe 102. Absorption tower 5 and atomizing tank 7 are connected to the gas separator 9 through pipes. Valves 12 are provided at the input ends of branch pipe 101, branch pipe 102, output pipe 401, output pipe 402, and atomizing tank 7. Absorption tower 4 and absorption tower 5 are located in a constant temperature water bath 6. A solution booster pump 8 is connected to atomizing tank 7 through a pipe. Desulfurizing agent is introduced into absorption tower 4, absorption tower 5, and solution booster pump 8. Furthermore, in this invention, a diversion mechanism 11 is provided in the absorption tower 4 and absorption tower 5, and branch pipe 101 and branch pipe 102 are located below the diversion mechanism 11. The aforementioned diversion mechanism 11 includes a bubble divider 1101 installed near the bottom of absorption tower 4 and absorption tower 5. The top of the bubble divider 1101 has a downwardly extending extension pipe 1104. Branch pipes 101 and 102 connect to the top of the extension pipe 1104. The bubble divider 1101 has several vertically penetrating diversion holes 1102, the diameter of which gradually decreases from the inside to the outside. The bubble divider 1101 includes an interconnected conical shroud and an extension section. The extension pipe 1104 extends from the bottom conical shroud, and the extension section extends the movement path of the bubbles within the diversion holes 1102. The diversion mechanism 11 also includes a bubble divider mesh 1103 installed in absorption tower 4 and absorption tower 5. The bubble divider mesh 1103 is located above the bubble divider 1101, and the pore size of the bubble divider mesh 1103 is smaller than that of the diversion holes 1102. The first absorption tower, the second absorption tower 5, and the atomizing tank 7 are connected to a drain pipe 13, which is equipped with a valve 12. The combined desulfurization device of this invention has the advantages of diverse operating modes and the ability to be freely combined.

[0068] This invention provides a test evaluation device, which includes a combined desulfurization device and a flow meter 14. The flow meter 14 is installed in the pipeline from the raw gas mixing tank 1 to the raw gas compressor 2. The pipeline from the raw gas mixing tank 1 to the raw gas compressor 2 is provided with a raw gas sampling port 15, and the output end of the gas separator 9 is provided with a purified gas sampling port 16. Both the raw gas sampling port 15 and the purified gas sampling port 16 are equipped with analyzers. An atomizing nozzle connected to a solution booster pump 8 is installed in the atomizing tank 7. By selecting different models of atomizing nozzles and adjusting the droplet size, different droplet fluid distributions can be achieved to evaluate the relationship between droplet size, gas velocity, and reaction effect under the atomization process and determine the optimal reaction equilibrium relationship. This invention provides a test evaluation method, which employs a test evaluation device and further includes the following steps: Sulfur-containing natural gas enters a raw material gas mixing tank 1 and is thoroughly mixed. Then, it flows from the output end of the raw material gas mixing tank 1 through a pipeline into a raw material gas compressor 2. Before entering the raw material gas compressor 2, it is measured and sampled for analysis using a flow meter 14 and an analyzer. The pressure of the sulfur-containing natural gas is then increased to no more than 4.0 MPa by the raw material gas compressor 2, and it flows through a pipeline into a gas buffer tank 3. After flowing out of the gas buffer tank 3, it enters an input pipe 10, and then flows into a branch pipe 101 / The natural gas enters the absorption tower 4 / absorption tower 5 for desulfurization treatment via branch pipe 2 (102), or directly enters the atomizing tank 7 for desulfurization treatment via input pipe 10. The purified natural gas treated by absorption tower 4 / absorption tower 5 / atomizing tank 7 is then piped into the gas separator 9. Samples are taken from the purified gas sampling port 16 at the output end of the gas separator 9 for analysis. The hydrogen sulfide content is compared between the raw material gas sampling port 15 and the purified gas sampling port 16 to calculate the hydrogen sulfide removal rate in the sulfur-containing natural gas. Then, the sulfur capacity of this experiment is calculated based on the flow meter 14 to evaluate the desulfurization performance of this experiment. The experimental evaluation device and method of this invention have the advantages of convenient evaluation and rapid selection of the most suitable desulfurization method.

[0069] 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 combined desulfurization device, characterized by comprising: The raw gas mixing tank (1), the raw gas compressor (2), the gas buffer tank (3) are sequentially connected through pipelines, The gas buffer tank (3) is provided with an input pipe (10) connected with the atomizing tank (7), the input pipe (10) is provided with a branch pipe one (101) connected with the absorption tower one (4) and a branch pipe two (102) connected with the absorption tower two (5), the absorption tower one (4) is provided with an output pipe one (401) connected with the gas distribution tank (9) and an output pipe two (402) connected with the branch pipe two (102), the absorption tower two (5) and the atomizing tank (7) are connected with the gas distribution tank (9) through pipelines respectively, The branch pipe one (101), the branch pipe two (102), the output pipe one (401), the output pipe two (402) and the input end of the atomizing tank (7) are all provided with valves (12), The absorption tower one (4) and the absorption tower two (5) are arranged in the constant temperature water bath tank (6), the solution booster pump (8) is connected with the atomizing tank (7) through a pipeline, and the absorption tower one (4), the absorption tower two (5) and the solution booster pump (8) are connected with the desulfurizing agent. The absorption tower one (4) and the absorption tower two (5) are provided with a shunt mechanism (11), and the branch pipe one (101) and the branch pipe two (102) are located on the lower side of the shunt mechanism (11).

2. The combined desulphurization device according to claim 1, characterized in that The shunt mechanism (11) comprises a bubble dividing piece (1101) arranged in the absorption tower one (4) and the absorption tower two (5) close to the bottom position, a top center of the bubble dividing piece (1101) is provided with an extension pipe (1104) extending downward, the branch pipe one (101) and the branch pipe two (102) are connected with the top of the extension pipe (1104), the bubble dividing piece (1101) is provided with a plurality of shunt holes (1102) penetrating up and down, the diameter of the shunt hole (1102) gradually decreases from inside to outside, the bubble dividing piece (1101) comprises a conical cover part and an extension part connected with each other, the extension pipe (1104) extends from the conical cover part at the bottom, and the extension part prolongs the moving path of the bubble in the shunt hole (1102).

3. The combined desulphurisation device according to claim 2, characterised in that The shunt mechanism (11) further comprises a bubble dividing net (1103) arranged in the absorption tower one (4) and the absorption tower two (5), the bubble dividing net (1103) is located on the upper side of the bubble dividing piece (1101), and the aperture of the bubble dividing net is smaller than that of the shunt hole (1102).

4. The combined desulphurisation device according to claim 3, characterised in that The absorption tower one (4) and the absorption tower two (5) are both provided with an expansion part, and the expansion part is located on the upper side of the desulfurizing agent liquid level.

5. The combined desulfurization device according to claim 1, characterized in that, ​ 6. The combined desulfurization device according to claim 1, characterized by The absorption tower one (4), the absorption tower two (5) and the atomization tank (7) are connected with a blowdown pipe (13), and the blowdown pipe (13) is provided with a valve (12).

7. An assay evaluation device characterized by The combined desulfurization device comprises the combined desulfurization device as claimed in claim 1, and further comprises a flow meter (14) arranged on a pipeline from the raw gas mixing tank (1) to the raw gas compressor (2), wherein the pipeline from the raw gas mixing tank (1) to the raw gas compressor (2) is provided with a raw gas sampling port (15), and an output end of the gas separation tank (9) is provided with a purified gas sampling port (16).

8. The test evaluation device according to claim 7, characterized in that The raw gas sampling port (15) and the purified gas sampling port (16) are both provided with an analyzer.

9. The test evaluation device according to claim 7, characterized in that The atomization tank (7) is provided with an atomization nozzle connected with the solution booster pump (8), different types of atomization nozzles are selected to adjust the size of droplets, different droplet fluid distributions are realized, the relationship between the size of droplets, gas speed and reaction effect under the atomization process is evaluated, and the best reaction balance relationship is determined.

10. A test evaluation method characterized by, The test evaluation device of claim 7 further comprises the following method, After the sulfur-containing natural gas is fully mixed in the raw gas mixing tank (1), the sulfur-containing natural gas is sent from an output end of the raw gas mixing tank (1) to the raw gas compressor (2) through a pipeline, is metered and sampled by the flow meter (14) and the analyzer before entering the raw gas compressor (2), and then is compressed by the raw gas compressor (2) to a pressure of not more than 4.0 MPa, is sent to the gas buffer tank (3) through a pipeline, and is sent to the input pipe (10) after flowing out of the gas buffer tank (3). After flowing to the branch pipe one (101) / branch pipe two (102), the sulfur-containing natural gas is desulfurized in the absorption tower one (4) / absorption tower two (5), or is directly desulfurized in the atomization tank (7) through the input pipe (10). The purified natural gas treated by the absorption tower one (4) / absorption tower two (5) / atomization tank (7) is sent to the gas separation tank (9) through a pipeline, and is sampled and analyzed through the purified gas sampling port (16) of an output end of the gas separation tank (9), The hydrogen sulfide content of the raw gas sampling port (15) and the purified gas sampling port (16) is compared, the removal rate of hydrogen sulfide in the sulfur-containing natural gas is calculated, the sulfur capacity of this test is calculated according to the flow meter (14), and the desulfurization performance of this test is evaluated.

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