Natural gas desulfurization device adopting combined membrane method

Abstract

The utility model relates to the technical field of natural gas desulfurization, in particular to a combined membrane method natural gas desulfurization device which comprises a box body, a membrane separation mechanism and a desulfurization mechanism, the membrane separation mechanism comprises a porous membrane, a gas inlet pipe, a connecting rod and a fan, and the desulfurization mechanism comprises a baffle, two gas conveying pipes and a liquid spraying unit. Natural gas enters the box body through the gas inlet pipe, then the draught fan is started, airflow in the box body is driven to flow, the natural gas flows and penetrates through the porous plasma membrane, the natural gas is preliminarily desulfurized through the porous plasma membrane, and then the preliminarily desulfurized natural gas flows to the position above the baffle through the two gas conveying pipes; and then secondary desulfurization is carried out through the liquid spraying unit, so that the device can carry out two-time separated desulfurization, and through preliminary desulfurization of the porous membrane, the desulfurization pressure of subsequently used desulfurization barren liquor is reduced, the desulfurization work can be better completed, the subsequent use of the desulfurization barren liquor can be reduced, the desulfurization cost is further reduced, and the desulfurization efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of natural gas desulfurization technology, and in particular to a combined membrane natural gas desulfurization device. Background Technology

[0002] Natural gas desulfurization refers to the process of removing acidic components such as hydrogen sulfide, organic sulfur, and carbon dioxide from natural gas. In existing natural gas desulfurization units, the contact between natural gas and desulfurization lean solution is insufficient, resulting in low desulfurization efficiency and poor desulfurization effect.

[0003] Patent document CN216171275U discloses a natural gas desulfurization device, comprising: an absorption tank, which is a vertically arranged hollow cylindrical structure, with an air inlet at the bottom and an air outlet at the top, the air inlet being connected to a natural gas inlet pipe, and a liquid outlet at the bottom of the absorption tank, with a valve inside the liquid outlet; a baffle, which is horizontally arranged inside the absorption tank and located above the air inlet, the side wall of the baffle being rotatably connected to the inner wall of the absorption tank, and multiple through holes evenly spaced on the baffle; and a spraying mechanism, which includes multiple nozzles arranged inside the absorption tank, any one of which is located above the baffle, and the liquid inlet end of any nozzle being connected to the desulfurization lean liquid inlet pipe. This application enables a more uniform distribution of natural gas in the absorption tank and more sufficient contact between natural gas and desulfurization lean liquid, thus having the beneficial effect of improving desulfurization efficiency and desulfurization effect.

[0004] However, in the aforementioned existing technologies, desulfurization is carried out solely by reacting desulfurization lean solution with natural gas, resulting in high desulfurization costs. Furthermore, when a large amount of natural gas is desulfurized simultaneously, the desulfurization pressure of the device is high, and the separation efficiency is slow. Utility Model Content

[0005] The purpose of this invention is to provide a combined membrane natural gas desulfurization device, which solves the problems of high desulfurization cost and slow desulfurization efficiency caused by the reaction of desulfurization lean liquid with natural gas in the existing technology, and the high desulfurization pressure and slow separation efficiency when a large amount of natural gas is desulfurized at the same time.

[0006] To achieve the above objectives, this utility model provides a combined membrane natural gas desulfurization device, including a housing, a membrane separation mechanism, and a desulfurization mechanism. The membrane separation mechanism includes a porous membrane, an inlet pipe, a connecting rod, and a blower. The desulfurization mechanism includes a baffle, two gas delivery pipes, and a liquid spraying unit. The porous membrane is disposed inside the housing, the inlet pipe is connected to the housing, the baffle is disposed inside the housing and above the porous membrane, one end of the connecting rod is fixedly connected to the lower end of the baffle, and the other end of the connecting rod is fixedly connected to the blower. The two gas delivery pipes are respectively fixedly connected to the inner wall of the housing, and one end of each gas delivery pipe passes through the baffle.

[0007] The spraying unit includes a storage tank, a connecting pipe, a dispensing pipe, multiple nozzles, and a solenoid valve. The storage tank is fixedly connected to the rear end of the housing. One end of the connecting pipe is connected to the bottom of the storage tank, and the other end of the connecting pipe passes through the outer wall of the housing and is fixedly connected to the dispensing pipe. The dispensing pipe is fixedly connected to the inner wall of the housing. The multiple nozzles are respectively fixedly connected to the dispensing pipe, and the solenoid valve is disposed on the connecting pipe.

[0008] The liquid spraying unit further includes a drain pipe, an inlet pipe, and a top cover. One end of the drain pipe passes through the baffle, and the other end of the drain pipe passes through the housing. The inlet pipe is connected to the upper end of the housing, and the top cover is located at the upper end of the inlet pipe.

[0009] The combined membrane natural gas desulfurization device also includes a bottom support, with an outlet at the top of the housing and the bottom support located at the bottom of the housing.

[0010] The solenoid valve is located below the liquid storage tank, the multiple nozzles are located below the liquid distribution pipe, and the two gas delivery pipes are fixedly connected to the baffle.

[0011] This utility model discloses a combined membrane natural gas desulfurization device. The inlet pipe is connected to an external natural gas pipe, and natural gas enters the housing through the inlet pipe. The blower is then activated, causing the airflow inside the housing to propel the natural gas through the porous membrane. The porous membrane performs preliminary desulfurization of the natural gas. The pre-desulfurized natural gas then flows through two gas delivery pipes to the top of a baffle, and then undergoes secondary desulfurization through a liquid injection unit. Thus, the device can perform two separate desulfurization processes. Furthermore, the preliminary desulfurization through the porous membrane reduces the desulfurization pressure of the subsequent desulfurization lean solution, resulting in better desulfurization and reduced use of the lean solution, thereby lowering desulfurization costs and achieving high desulfurization efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a left view of the entire utility model.

[0015] Figure 3 This is the utility model Figure 2 A sectional view along line AA.

[0016] Figure 4 This is the utility model Figure 3 BB line section view.

[0017] 101-Box body, 102-Bottom support, 103-Porous membrane, 104-Inlet pipe, 105-Connecting rod, 106-Fan, 107-Baffle, 108-Gas delivery pipe, 109-Liquid storage tank, 110-Connecting pipe, 111-Dispensing pipe, 112-Nozzle, 113-Solenoid valve, 114-Drain pipe, 115-Inlet pipe, 116-Top cover, 117-Outlet. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0019] Please see Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a left view of the entire utility model. Figure 3 This is the utility model Figure 2 AA-line sectional view, Figure 4 This is the utility model Figure 3 BB line section view.

[0020] This utility model provides a combined membrane natural gas desulfurization device, including a housing 101, a membrane separation mechanism, a desulfurization mechanism, and a bottom support 102. The membrane separation mechanism includes a porous membrane 103, an inlet pipe 104, a connecting rod 105, and a blower 106. The desulfurization mechanism includes a baffle 107, two gas delivery pipes 108, and a liquid spraying unit. The liquid spraying unit includes a liquid storage tank 109, a connecting pipe 110, a liquid distribution pipe 111, multiple nozzles 112, a solenoid valve 113, a drain pipe 114, an inlet pipe 115, and a top cover 116. The top of the housing 101 has an outlet 117.

[0021] In this specific embodiment, the air inlet pipe 104 is connected to an external natural gas pipe. Natural gas then enters the housing 101 through the air inlet pipe 104. The blower 106 is then started, causing the airflow inside the housing 101 to flow, allowing the natural gas to flow through the porous membrane 103. The porous membrane 103 performs preliminary desulfurization on the natural gas. The pre-desulfurized natural gas then flows through the two gas transmission pipes 108 to the top of the baffle 107, and then undergoes secondary desulfurization through the liquid spraying unit. Thus, the device can perform two separate desulfurization processes. Furthermore, the preliminary desulfurization through the porous membrane 103 reduces the desulfurization pressure of the subsequent desulfurization lean solution, enabling better desulfurization and reducing the use of subsequent desulfurization lean solution, thereby lowering desulfurization costs and achieving high desulfurization efficiency.

[0022] The porous membrane 103 is disposed inside the housing 101, the air inlet pipe 104 is connected to the housing 101, the baffle 107 is disposed inside the housing 101 and above the porous membrane 103, one end of the connecting rod 105 is fixedly connected to the lower end of the baffle 107, the other end of the connecting rod 105 is fixedly connected to the fan 106, and the two air delivery pipes 108 are respectively fixedly connected to the inner wall of the housing 101, with one end of each air delivery pipe 108 passing through the baffle 107. The inlet pipe 104 is connected to an external natural gas pipe, and then natural gas enters the housing 101 through the inlet pipe 104. Then, the blower 106 is started, and the airflow inside the housing 101 is driven to flow, causing the natural gas to flow and pass through the porous membrane 103. The natural gas undergoes preliminary desulfurization through the porous membrane 103. Then, the preliminarily desulfurized natural gas flows through the two gas transmission pipes 108 to the top of the baffle 107, and then undergoes secondary desulfurization through the liquid spraying unit. Thus, the device can perform two separate desulfurization processes. Furthermore, the preliminary desulfurization through the porous membrane 103 reduces the desulfurization pressure of the subsequent desulfurization lean solution, which can better complete the desulfurization work and reduce the use of subsequent desulfurization lean solution, thereby reducing desulfurization costs and achieving high desulfurization efficiency.

[0023] Secondly, the storage tank 109 is fixedly connected to the rear end of the tank body 101. One end of the connecting pipe 110 communicates with the bottom of the storage tank 109, and the other end of the connecting pipe 110 passes through the outer wall of the tank body 101 and is fixedly connected to the distribution pipe 111. The distribution pipe 111 is fixedly connected to the inner wall of the tank body 101. Multiple nozzles 112 are respectively fixedly connected to the distribution pipe 111. The solenoid valve 113 is disposed on the connecting pipe 110. When the solenoid valve 113 is opened, the desulfurized lean liquid in the storage tank 109 flows from the connecting pipe 110 into the distribution pipe 111, and then is atomized and sprayed out from the multiple nozzles 112, thereby reacting with the preliminarily desulfurized natural gas in the tank body 101 to perform desulfurization.

[0024] Meanwhile, one end of the drain pipe 114 passes through the baffle 107, and the other end of the drain pipe 114 passes through the housing 101. The inlet pipe 115 is connected to the upper end of the housing 101, and the top cover 116 is located at the upper end of the inlet pipe 115. A recovery tank is connected to the outside of the drain pipe 114. When the desulfurized lean liquid reacts with natural gas, the reactants fall onto the baffle 107 and then flow into the recovery tank through the drain pipe 114 for subsequent processing. When the desulfurized lean liquid in the storage tank 109 is insufficient, the top cover 116 can be opened to add external liquid into the storage tank 109 through the inlet pipe 115.

[0025] Furthermore, the top of the housing 101 has a gas outlet 117, and the bottom support 102 is located at the bottom of the housing 101. The solenoid valve 113 is located below the liquid storage tank 109, and multiple nozzles 112 are respectively located below the liquid distribution pipe 111. The two gas transmission pipes 108 are respectively fixedly connected to the baffle 107. After the natural gas is completely desulfurized, the natural gas is discharged through the gas outlet 117 at the top, and a collection pipe can be connected to the gas outlet 117 for storing the natural gas. The bottom support 102 is used to support the housing 101.

[0026] When using the combined membrane natural gas desulfurization device of this utility model, the inlet pipe 104 is connected to an external natural gas pipe, and then natural gas enters the housing 101 through the inlet pipe 104. Then, the blower 106 is started, and the airflow inside the housing 101 is driven to flow, causing the natural gas to flow and pass through the porous membrane 103. The porous membrane 103 performs preliminary desulfurization on the natural gas. Then, the preliminarily desulfurized natural gas flows through the two gas transmission pipes 108 to the top of the baffle 107, and then undergoes secondary desulfurization through the liquid spraying unit. Thus, the device can perform two separate desulfurization processes. The preliminary desulfurization through the porous membrane 103 reduces the desulfurization pressure of the subsequent desulfurization lean solution, which can better complete the desulfurization work and reduce the use of subsequent desulfurization lean solution, thereby reducing desulfurization costs and achieving high desulfurization efficiency. The solenoid valve 113 is opened to allow the... The desulfurized lean liquid in the storage tank 109 flows from the connecting pipe 110 into the distribution pipe 111, and then is atomized and sprayed out from multiple nozzles 112 to react with the preliminarily desulfurized natural gas in the tank 101, thereby performing desulfurization. The drain pipe 114 is externally connected to a recovery tank. After the desulfurized lean liquid reacts with the natural gas, the reactants fall onto the baffle 107 and then flow into the recovery tank along the drain pipe 114 for subsequent processing. When the desulfurized lean liquid in the storage tank 109 is insufficient, the top cover 116 can be opened to add external liquid into the storage tank 109 through the inlet pipe 115. After the natural gas is completely desulfurized, the natural gas is discharged through the gas outlet 117 at the top, and a collection pipe can be connected to the gas outlet 117 for storing the natural gas. The bottom support 102 is used to support the tank 101.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A combined membrane natural gas desulfurization device, characterized in that, Includes the housing, membrane separation unit, and desulfurization unit; The membrane separation mechanism includes a porous membrane, an air inlet pipe, a connecting rod, and a fan. The desulfurization mechanism includes a baffle, two gas delivery pipes, and a liquid spraying unit. The porous membrane is disposed inside the housing. The air inlet pipe is connected to the housing. The baffle is disposed inside the housing and above the porous membrane. One end of the connecting rod is fixedly connected to the lower end of the baffle, and the other end of the connecting rod is fixedly connected to the fan. The two gas delivery pipes are respectively fixedly connected to the inner wall of the housing, and one end of each gas delivery pipe passes through the baffle.

2. The combined membrane natural gas desulfurization device as described in claim 1, characterized in that, The spraying unit includes a storage tank, a connecting pipe, a dispensing pipe, multiple nozzles, and a solenoid valve. The storage tank is fixedly connected to the rear end of the housing. One end of the connecting pipe is connected to the bottom of the storage tank, and the other end of the connecting pipe passes through the outer wall of the housing and is fixedly connected to the dispensing pipe. The dispensing pipe is fixedly connected to the inner wall of the housing. The multiple nozzles are respectively fixedly connected to the dispensing pipe, and the solenoid valve is disposed on the connecting pipe.

3. The combined membrane natural gas desulfurization device as described in claim 2, characterized in that, The liquid spraying unit also includes a drain pipe, an inlet pipe, and a top cover. One end of the drain pipe passes through the baffle, and the other end of the drain pipe passes through the housing. The inlet pipe is connected to the upper end of the housing, and the top cover is located at the upper end of the inlet pipe.

4. The combined membrane natural gas desulfurization device as described in claim 3, characterized in that, The combined membrane natural gas desulfurization device also includes a bottom support, the top of the housing has an outlet, and the bottom support is located at the bottom of the housing.

5. The combined membrane natural gas desulfurization device as described in claim 4, characterized in that, The solenoid valve is located below the liquid storage tank, the multiple nozzles are located below the liquid distribution pipe, and the two gas delivery pipes are fixedly connected to the baffle.

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