A filter device for natural gas transmission

Abstract

The application relates to the field of natural gas pretreatment technology, in particular to a filtering device for natural gas transportation, which comprises a cooling pipeline of a pressure drop device cooling part, a filtering container sleeved on the cooling pipeline and a filter piece sleeved on the top of the cooling pipeline; the filter piece is sleeved with a partition plate, the partition plate is provided with a backflow cavity at the outer ring of the filter piece, and the output end of the cooling pipeline is communicated with a backflow pipe; the bottom of the partition plate is fixedly connected with a dehydration ring which is sleeved on the top of the filter piece and the cooling pipeline, the dehydration ring is concave downward to form a tubular dehydration ring groove, a dehydration pipe which is fixed to the partition plate and communicated with the backflow cavity is arranged in the dehydration ring groove, and the dehydration ring groove contains an alkaline liquid dehydration agent; the outer wall of the dehydration ring groove is provided with air holes and is attached to the outer wall of the filter piece, the bottom of the filtering container is provided with a containing assembly for containing condensed water, and the side of the filtering container is provided with an output end of natural gas. The application can reduce the corrosion of the pipeline in the natural gas pretreatment process in limited space.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of natural gas pretreatment technology, and in particular to a filtering device for natural gas transportation. BACKGROUND

[0002] Natural gas is one of the fuels commonly used in daily life at present, and it is usually transported over a long distance through pipeline technology. In order to maintain long-distance transportation, the natural gas is pressurized to maintain the pressure and power of transportation. The pressure of household natural gas is clearly regulated, so in the current natural gas exploitation and transportation industry process, the natural gas is usually throttled and depressurized before being filtered and pretreated, and then can be used by users.

[0003] However, in the pretreatment process, especially in the throttling and depressurization process, the temperature of the throttling and depressurization position will suddenly drop due to the sharp drop of the natural gas pressure, such as the introduction pipe of the pressure reducing valve and the pressure reducing valve, which is prone to ice blockage phenomenon, reduces the flow capacity of the pipeline, causes solid impurities to accumulate and block the pipeline or causes physical damage, or causes damage to the valve and instrument. At the same time, in the process of high-pressure natural gas transportation, due to the temperature drop caused by pressure drop, natural gas hydrate or condensed small particles are often formed, which form larger solid particles or impurities, which can cause erosion damage to the pipe wall.

[0004] In the prior art, the commonly used way is to heat and keep warm or use multi-stage pressure regulation. However, in actual use, although pure heat preservation can slow down the icing phenomenon, it cannot avoid the generation of condensed water. Combined with external oxygen and relatively high temperature, it is easy to cause corrosion to the pipeline. Multi-stage pressure reduction often needs more or larger equipment to complete, which needs to occupy relatively larger space. Therefore, how to reduce the corrosion to the pipeline in the natural gas pretreatment process in a limited space is a problem to be solved at present. SUMMARY

[0005] In order to reduce the corrosion to the pipeline in the natural gas pretreatment process in a limited space, the present application provides a filtering device for natural gas transportation.

[0006] The filtering device for natural gas transportation provided by the present application adopts the following technical scheme:

[0007] The application discloses a filtering device for natural gas transmission, which comprises a cooling pipeline of a pressure drop device cooling part, a filtering container sleeved on the cooling pipeline and a filtering element sleeved on the top of the cooling pipeline; the filtering element is sleeved with an annular separation plate, the separation plate is provided with a reflux cavity opposite to the outer ring of the filtering element, the output end of the cooling pipeline is communicated with a reflux pipeline for returning the cooled natural gas to the reflux cavity, the reflux pipeline is at least partially located outside the filtering container and is provided with a heating element for heating; the bottom of the separation plate is fixedly connected with a dehydration ring which is sleeved on the top of the filtering element and the cooling pipeline, the dehydration ring is concave downward to form a tubular dehydration ring groove, a plurality of dehydration pipes which are fixed on the separation plate and communicated with the reflux cavity are arranged in the dehydration ring groove, and the dehydration ring groove contains an alkaline liquid dehydration agent; at least the top of the outer wall of the dehydration ring groove is provided with air holes and is attached to the outer wall of the filtering element; the bottom of the filtering container is provided with a containing assembly for containing condensed water, and the side of the filtering container is provided with an output end of the natural gas.

[0008] By adopting the technical scheme, when the natural gas is transmitted, the natural gas after pressure reduction is output through the cooling pipeline, the temperature of the natural gas is obviously reduced in the cooling pipeline, and then the natural gas is input into the reflux cavity through the reflux pipeline; at this time, the temperature of the natural gas entering the reflux cavity can be increased by heating the reflux pipeline, and the filtering container can be radiated by heat transfer, so that the condensed water on the outer wall of the filtering container is obviously reduced; the natural gas after temperature increase enters the alkaline liquid dehydration agent in the dehydration ring groove, at this time, the natural gas can be pretreated by first dehydration, and the alkaline liquid dehydration agent can neutralize the sulfide in the natural gas to a certain extent; after the natural gas after dehydration pretreatment is filtered by the filtering element, the natural gas enters the inside of the filtering container and contacts the cooling pipeline; because the temperature of the cooling pipeline is relatively low and the temperature of the filtered natural gas is relatively high, the temperature difference is relatively large, so that the filtered natural gas can be secondarily dehydrated by condensation dehydration on the outer wall of the cooling pipeline; because the filtering container is dehydrated by the alkaline liquid dehydration agent, the sulfide is obviously reduced, and the oxygen content is extremely low, so that the possibility of corrosion of the cooling pipeline is obviously reduced, and the natural gas in the cooling pipeline can be pretreated by temperature increase, so that the possibility of condensed water on the outer wall of the filtering container is obviously reduced; compared with a plurality of pressure drop devices which need to be connected in series, the structure of the inner and outer superposition can effectively reduce the required space, so that the corrosion of the pipeline in the natural gas pretreatment process can be reduced in the limited space; and the condensed water can be received and stored by the containing assembly.

[0009] Optionally, the top of the dehydration ring groove is provided with an input valve which extends out of the filtering container and is used for controlling the input of the alkaline liquid dehydration agent; and the bottom of the dehydration ring groove is provided with an output valve which extends out of the filtering container and is used for controlling the output of the alkaline liquid dehydration agent.

[0010] By adopting the technical scheme, the alkaline liquid dewatering agent in the dehydration ring groove can be replaced in real time during the pretreatment of natural gas.

[0011] Optionally, the filter element comprises a plurality of filter plates arranged around the cooling pipeline, the filter plates are in arc-shaped plate structure and are attached to the outer wall of the cooling pipeline, the filter plates are inserted from the top of the filter container, the inner ring of the partition plate is attached to the outer wall of the filter plate, and the inner ring of the partition plate extends towards the top wall of the filter container and is fixed to the inner wall of the filter container, and the top of the filter container is detachably fixed with a cover plate covering and sealing the extended part of the filter plate.

[0012] By adopting the technical scheme, since the filter element is arranged between the partition plate and the cooling pipeline in a plug-in manner, when the filter element needs to be replaced, only the cover plate needs to be removed, the filter plate needs to be pulled out and replaced, and then the cover plate needs to be sealed.

[0013] Optionally, the outer wall of the cooling pipeline located on the inner side of the filter container is provided with a plurality of cooling fins.

[0014] By adopting the technical scheme, the cooling fins can fully contact more natural gas with relatively high temperature after filtration and transfer heat to the cooling pipeline, so as to fully heat the cooling pipeline and also fully perform secondary condensation dewatering treatment through the full contact of the cooling fins.

[0015] Optionally, the plurality of cooling fins are divided into a plurality of groups and arranged around the cooling pipeline, and the plurality of cooling fins in the same group are distributed along the axial direction of the cooling pipeline or in the spiral line direction with the axial direction of the cooling pipeline as the spiral center.

[0016] By adopting the technical scheme, when the natural gas contacts the cooling fins, the natural gas can flow spirally downward, and since the cooling fins are arranged in a staggered manner, the natural gas can further fully contact the cooling fins to achieve sufficient condensation dewatering.

[0017] Optionally, the groove walls corresponding to the inner side and the outer side inside the dehydration ring groove are respectively provided with a plurality of buffer plates distributed along the axial direction of the cooling pipeline, and the buffer plates adjacent along the axial direction of the cooling pipeline are respectively located on the opposite groove walls of the dehydration ring groove and are arranged in an interlaced manner.

[0018] By adopting the above technical scheme, after the natural gas is output from the self-dehydration pipe, relatively more bubbles will be formed in the liquid dehydration agent in the dehydration ring groove, and because the produced bubbles will disturb the liquid dehydration agent, the dehydration effect will be affected, and the existence of the buffer plate will make the rising path of the formed bubbles in the dehydration ring groove be a broken line, and in this process, the bubbles will hit the buffer plate, on the one hand, the buffer plate will be washed, and in the process of replacing the liquid dehydration agent, on the other hand, in the process of the bubbles contacting the buffer plate, more smaller bubbles will be formed, and in the process of the bubbles breaking, the bubbles will fully contact the liquid dehydration agent to fully perform the dehydration and desulfurization treatment, and at the same time, the buffer plate can also inhibit the churning of the liquid dehydration agent.

[0019] Optionally, the groove wall of the dehydration ring groove is provided with a plurality of flow disturbing members, the flow disturbing members include a floating plate rotatably arranged on the inner wall of the dehydration ring groove and a flow disturbing plate rotatably arranged at a position corresponding to the peripheral side of the cooling pipe in the dehydration ring, the rotation center of the flow disturbing plate is coaxially connected to the rotation center of the floating plate through a connecting shaft, and the floating plate is floatingly arranged in the dehydration ring groove.

[0020] By adopting the above technical scheme, because the bubbles generated in the dehydration ring groove and the impact force generated when the bubbles break, and the churning liquid dehydration agent will push the floating plate to swing, the swinging floating plate will drive the flow disturbing plate to swing through the connecting shaft, and because the generation of bubbles and the churning of the liquid dehydration agent are irregular phenomena, the swinging of the flow disturbing plate will also be irregular, so that the natural gas around the cooling fins can be irregularly disturbed, so that the filtered natural gas can further fully contact the cooling fins and be subjected to secondary condensation dehydration treatment; in addition, the floating plate can also synchronously inhibit the churning of the liquid dehydration agent; at the same time, the swinging floating plate can further crush the nearby bubbles, further optimizing the dehydration effect of the liquid dehydration agent.

[0021] Optionally, the floating plate is arranged along the central axis direction of the dehydration ring groove and is provided with a floating cavity at the top, and the thickness of the floating plate gradually decreases from top to bottom.

[0022] By adopting the above technical scheme, the top of the floating plate will serve as the swinging part, compared with the lower part, the lower part of the floating plate will serve as the rotation center, and the top will swing, so that the two side walls of the floating plate can fully contact the bubbles, further optimizing the probability of contacting the bubbles, and achieving the purpose of optimizing the dehydration efficiency.

[0023] Optionally, the containing assembly comprises a condensing container with an upper opening and a plurality of condensing plates arranged in the condensing container, the upper opening of the condensing container is fixed and communicated with the bottom of the filtering container, the condensing plates are divided into two groups and oppositely arranged, the sides of the two groups of condensing plates away from each other are fixed to the inner wall of the condensing container, the sides of the two groups of condensing plates facing each other are obliquely arranged towards the bottom, and the two groups of condensing plates are staggered with each other, and the bottom of the condensing container is provided with a drain valve for periodic drainage.

[0024] By adopting the above technical scheme, the condensed water falls into the condensing container, and the presence of the condensing plates makes the natural gas flow on the surface of the collected condensed water relatively slow, so as to reduce the volatilization of the condensed water.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. When natural gas is transported, the natural gas after pressure reduction is output through the cooling pipeline, and the temperature in the cooling pipeline is significantly reduced, and then the natural gas is input into the reflux cavity through the reflux pipe, at this time, heating the reflux pipe can increase the temperature of the natural gas entering the reflux cavity, and at the same time, the heat transfer radiation can significantly reduce the condensed water generated on the outer wall of the filtering container due to the natural gas; the natural gas after temperature rise enters the alkaline liquid dehydration agent in the dehydration ring groove, at this time, the natural gas can be pretreated by first dehydration, and the alkaline liquid dehydration agent can also neutralize the sulfides in the natural gas to a certain extent; after the dehydration pretreatment, the natural gas filtered by the filtering element to remove impurities enters the inside of the filtering container and contacts the cooling pipeline, and because the temperature of the cooling pipeline is relatively low and the temperature of the filtered natural gas is relatively high, the temperature difference is relatively large, so that the cooling pipeline can be subjected to secondary dehydration by condensation dehydration on the outer wall of the cooling pipeline, and because the filtering container is subjected to dehydration by the alkaline liquid dehydration agent, the content of sulfides is significantly reduced, and the content of oxygen is extremely low, so that the possibility of corrosion of the cooling pipeline is significantly reduced.

[0027] 2. The natural gas filtered by the filtering element enters the side of the cooling pipeline, and can also be subjected to temperature rise pretreatment, so as to significantly reduce the possibility of condensed water generated on the outer wall of the filtering container when the natural gas output from the cooling pipeline enters the filtering container, and compared with the multi-stage pressure reduction which needs to connect a plurality of pressure reduction devices in series, the structure of superposition inside and outside can effectively reduce the required space, so that the corrosion of the pipeline in the natural gas pretreatment process can be reduced in the limited space. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a sectional view of the embodiment.

[0029] Figure 2 is Figure 1Enlarged structural schematic view of part A.

[0030] Figure 3 Fig. 3 is a schematic view of the floating plate along the axial direction of the connecting shaft in this embodiment.

[0031] Reference signs: 1, cooling pipeline; 11, return pipeline; 12, cooling fin; 2, filter container; 20, cover plate; 21, partition plate; 22, return cavity; 23, dehydration ring; 231, dehydration ring groove; 232, dehydration pipeline; 233, input valve; 234, output valve; 235, buffer plate; 24, heating element; 3, filter element; 31, filter plate; 4, containing assembly; 41, condensation container; 42, condensation plate; 43, drainage valve; 5, turbulence element; 51, floating plate; 511, floating cavity; 52, turbulence plate; 53, connecting shaft. DETAILED DESCRIPTION

[0032] The following will be described in detail with reference to the accompanying drawings. Figures 1-3 The present application will be further described in detail.

[0033] The embodiment of the present application discloses a filtering device for natural gas transportation. Referring to Figure 1 and Figure 2 The filtering device for natural gas transportation comprises a cooling pipeline 1, a filter container 2 and a filter element 3. The cooling pipeline 1 is a pipeline which is prone to icing or condensate water generation due to temperature drop of the pressure drop part of the pressure drop device, for example, the pipeline at the output part of the pressure reducing valve. The cooling pipeline 1 is vertically arranged.

[0034] The filter container 2 is vertically arranged, and the cooling pipeline 1 is at least partially inserted into the filter container 2 from the top and arranged on the same central axis, so that the filter container 2 can wrap the cooling pipeline 1. The filter element 3 is arranged at the top of the filter container 2 and wrapped around the cooling pipeline 1.

[0035] The filter element 3 is provided with a partition plate 21 on the outer side. The partition plate 21 is annular and horizontally arranged. The inner ring of the partition plate 21 is bent upwards and fixedly connected to the inner wall of the top surface of the filter container 2. The outer ring of the partition plate 21 extends horizontally and outwardly and is fixedly connected to the inner wall of the filter container 2. A return cavity 22 is formed on the outer side of the partition plate 21 corresponding to the part inside the filter container 2, that is, the return cavity 22 is annular in structure, and the part of the partition plate 21 bent upwards is attached to the outer wall of the top of the filter element 3. Of course, in other embodiments, the partition plate 21 can also be provided with an arc-shaped or other structure in cross-sectional profile, as long as the annular return cavity 22 can be formed on the outer side of the partition plate 21.

[0036] Referring to Figure 1 and Figure 2The part of the cooling pipeline 1 inside the filtering container 2 is fixed and communicated with the backflow pipeline 11, and the other end of the backflow pipeline 11 is communicated with the backflow cavity 22. The middle part of the backflow pipeline 11 is first out of the filtering container 2, and then communicated with the backflow cavity 22 from the top of the filtering container 2, so that the backflow pipeline 11 is in U shape and horizontally opened to the filtering container 2. Of course, in other embodiments, the backflow pipeline 11 can be directly bent upwards and communicated with the backflow cavity 22.

[0037] Meanwhile, the part of the backflow pipeline 11 outside the filtering container 2 is provided with a heating member 24 for heating, so as to pre-heat the natural gas before filtering. The heating member 24 can adopt electric heating, and of course, in the present embodiment, the heating member 24 adopts an electromagnetic heating coil for uniformly heating the natural gas.

[0038] Referring to Figure 1 and Figure 2 In addition, the bottom wall of the horizontal part of the partition plate 21 is fixedly connected with a dehydration ring 23, the dehydration ring 23 is sleeved on the filtering member 3 and the cooling pipeline 1, the inner and outer circles of the dehydration ring 23 are fixedly connected to the partition plate 21, and the middle part of the inner and outer circles of the dehydration ring 23 is concavely formed with a dehydration ring groove 231. The dehydration ring groove 231 is arranged around the filtering member 3 and the cooling pipeline 1, and the dehydration ring groove 231 is at least matched with the outer wall of the filtering member 3 on the upper part of the inner side of the partition plate 21. The dehydration ring groove 231 contains a liquid dehydration agent with alkaline pH value, such as a solution of monoethanolamine, diethanolamine and diisopropanolamine.

[0039] Referring to Figure 1 and Figure 2 A plurality of dehydration pipes 232 are arranged in the dehydration ring groove 231, the upper end of the dehydration pipe 232 is fixed to the partition plate 21, and the partition plate 21 is provided with a through hole corresponding to the part fixed with the dehydration pipe 232, so that the natural gas can enter the dehydration ring groove 231 and be pre-processed by the liquid dehydration agent. Meanwhile, a plurality of air holes are arranged on the top of the dehydration ring groove 231 corresponding to the filtering member 3, so that the natural gas after dehydration pre-processing can pass through the filtering member 3 and then enter the middle and lower part of the filtering container 2. At this time, since the temperature of the cooling pipeline 1 is relatively low, the natural gas can be secondarily dehydrated by condensation.

[0040] Moreover, since the natural gas is first dehydrated by the alkaline liquid dehydrating agent, on the one hand, the water content is reduced, and on the other hand, the possibility of corrosion of the cooling pipeline 1 caused by acidic substances in the condensed water is effectively reduced. Secondly, since the natural gas is filled in the filter container 2, the cooling pipeline 1 can effectively reduce the contact with oxygen, further reducing the possibility of oxidation corrosion in the condensing part. And the filter container 2 is set outside the cooling pipeline 1, which can effectively reduce the space occupied compared with multi-stage filtering. The pre-treatment of the heating element 24 can also preheat the cooling pipeline 1, reducing the possibility of secondary condensate water after the natural gas in the cooling pipeline 1 is transported to the outside through the return pipe 11. The side of the filter container 2 is fixed and communicated with the output pipe 25 corresponding to the lower side of the partition plate 21, which is used as the output end of the dehydrated natural gas.

[0041] Finally, in order to receive the condensed water, the bottom of the filter container 2 is provided with a containing assembly 4 for receiving the condensed water.

[0042] Referring to Figure 1 and Figure 2 At the same time, in order to replace the liquid dehydrating agent in the dehydration ring groove 231 in time, the top of the dehydration ring groove 231 is fixed and communicated with a pipeline extending out of the filter container 2, and the part of the pipeline outside the filter container 2 is provided with an input valve 233 for controlling the input of the alkaline liquid dehydrating agent. The bottom of the dehydration ring groove 231 is also fixed and communicated with a pipeline extending out of the filter container 2, and the pipeline at the bottom is provided with an output valve 234 for controlling the output of the alkaline liquid dehydrating agent, so as to replace the liquid dehydrating agent in the dehydration ring groove 231 in real time or regularly.

[0043] Of course, in other embodiments, the pipeline provided on the outer wall of the dehydration ring groove 231 can also be vertically installed, and the replacement of the liquid dehydrating agent can also be through the top and bottom of the filter container 2.

[0044] Referring to Figure 1 and Figure 2In the embodiment, since the dehydration pipe 232 inputs natural gas into the liquid dehydration agent, it will cause the liquid dehydration agent to churn violently, affecting the dehydration effect, and the natural gas cannot be repeatedly contacted with the dehydration agent for dehydration. Therefore, the corresponding inner and outer groove walls of the dehydration ring groove 231 are respectively provided with a plurality of buffer plates 235 distributed along the axial direction of the cooling pipeline 1. The buffer plate 235 is preferably annular, and the buffer plate 235 can be a mesh plate or a solid plate. Adjacent buffer plates 235 along the axial direction of the cooling pipeline 1 are respectively located on the opposite groove walls of the dehydration ring groove 231 and are staggered. That is, the outer ring of one of the two adjacent buffer plates 235 is fixed to the outer groove wall of the dehydration ring groove 231, and the inner ring of the other of the two adjacent buffer plates 235 is fixed to the inner groove wall of the dehydration ring groove 231. The projection parts of the two adjacent buffer plates 235 along the axial direction of the cooling pipeline 1 overlap, so that the bubbles of natural gas formed in the dehydration ring groove 231 can be staggered upward and form more small bubbles through the installed buffer plates 235, so that the natural gas can be fully contacted with the liquid dehydration agent, and the churning of the liquid dehydration agent in the dehydration ring groove 231 can be effectively inhibited through the buffer plates 235, thereby optimizing the stability during use.

[0045] In order to further preheat the natural gas after dehydration pretreatment, the cooling pipeline 1 is provided with a plurality of cooling fins 12 at the position below the filter element 3 in the filter container 2. The cooling fins 12 are arrayed and staggered on the outer wall of the cooling pipeline 1. That is, the cooling fins 12 are divided into a plurality of groups surrounding the cooling pipeline 1, and the cooling fins 12 in the same group are distributed along the axial direction of the cooling pipeline 1 or spirally distributed along the spiral line with the axial direction of the cooling pipeline 1 as the spiral center. This can further enable the natural gas to be fully contacted with the cooling fins 12 and heat treated, accelerate the heat exchange between the cooling pipeline 1 and the natural gas outside, and fully enable the water in the natural gas to be condensed into water, thereby performing secondary dehydration treatment on the natural gas.

[0046] Referring to Figure 1 and Figure 2 Specifically, the cooling fins 12 in the same group and adjacent along the axial direction of the cooling pipeline 1 have opposite spiral angles in the vertical direction. When the natural gas is transported downward, the cooling fins 12 can guide the natural gas to flow in different directions. On the one hand, it can avoid the formation of regular spiral downward airflow to a certain extent, so that part of the natural gas cannot be contacted with the cooling fins 12 and the cooling pipeline 1, thereby affecting the preheating effect. On the other hand, it can also fully condense and dehydrate the natural gas.

[0047] Referring to Figure 1 and Figure 2Further, in order to make the natural gas in the dehydration ring groove 231 contact with the liquid dehydration agent sufficiently, and to form irregular air flow around the side of the cooling pipeline 1, the groove wall of the dehydration ring groove 231 is provided with a plurality of turbulence members 5 for irregularly disturbing the natural gas.

[0048] The turbulence member 5 comprises a floating plate 51 and a turbulence plate 52, the lower end of the floating plate 51 is rotationally connected to the groove wall on the side of the dehydration ring groove 231 facing the cooling pipeline 1, and the turbulence plate 52 is rotationally connected to the outer wall on the side of the dehydration ring groove 231 facing the cooling pipeline 1, that is, the turbulence plate 52 is rotationally connected to the outer wall on the innermost side of the dehydration ring 23. The rotation axes of the floating plate 51 and the turbulence plate 52 are coaxially arranged and horizontally intersect the central axis of the dehydration ring 23, the rotation axis of the floating plate 51 is located at the lower part, the floating plate 51 is vertically arranged and the inner side of the top part is formed with a floating cavity 511, so that the floating plate 51 can be suspended in the liquid dehydration agent; the turbulence plate 52 can be arranged horizontally or obliquely, and the floating plate 51 and the turbulence plate 52 are coaxially connected through a connecting shaft 53 penetrating the inner cavity wall of the dehydration ring 23, and the connecting shaft 53 is coaxially arranged with the rotation axes of the floating plate 51 and the turbulence plate 52 and is rotationally sealed.

[0049] Referring to Figure 2 and Figure 3 Since the natural gas output from the dehydration pipeline 232 will form bubbles in the dehydration ring groove 231 and drive the liquid dehydration agent to boil, on the one hand, the bubbles will contact the floating plate 51, the impact generated by the rupture of the bubbles will push the floating plate 51 to swing, and smaller bubbles will be formed, on the other hand, the boiling liquid dehydration agent will simultaneously push the floating plate 51 to swing, so that the natural gas can contact the liquid dehydration agent sufficiently, and the boiling of the liquid dehydration agent is inhibited. In addition, since the boiling of the liquid dehydration agent and the formation of the bubbles are irregular, the connecting shaft 53 can also drive the turbulence plate 52 to swing irregularly, so that the air flow around the side of the cooling fin 12 is irregular, and the natural gas is further fully contacted with the cooling fin 12 and is subjected to secondary condensation dehydration. Compared with the floating plate 51 directly immersed in the liquid dehydration agent, the existence of the floating cavity 511 can make the top part of the floating plate 51 as a swing part, which can cooperate with the boiling liquid dehydration agent, so that the inclined surface of the floating plate 51 when it is inclined can fully contact with the bubbles floating from bottom to top, so as to further optimize the breaking effect of the natural gas bubbles and the turbulence effect on the inner side air flow of the natural gas.

[0050] Referring to Figure 2 and Figure 3, specifically, in order to filter the natural gas after dehydration by the liquid dehydration agent, facilitate timely replacement, the filter element 3 comprises a plurality of filter plates 31 arranged around the cooling pipeline 1, the filter plate 31 is in the form of an arc-shaped plate structure, a plurality of filter plates 31 are spliced with each other to form a tubular structure and are sleeved on the outer wall of the top of the cooling pipeline 1, and the outer wall of the filter plate 31 is attached to the inner wall of the dehydration ring 23 and the inner wall of the upwardly bent part of the separation plate 21.

[0051] The filter plate 31 is inserted into the annular space between the separation plate 21 and the cooling pipeline 1 from the top of the filter container 2 towards the inside, and the top of the filter plate 31 at least partially protrudes out of the filter container 2. The top of the filter container 2 is detachably fixedly connected with a cover plate 20, the cover plate 20 is in the form of a ring, and the outer ring is detachably fixedly connected to the outer wall of the top of the filter container 2 by bolts or the like, the inner ring of the cover plate 20 is upwardly bent and fixed to the part of the cooling pipeline 1 located outside the filter container 2 by bolts or clamps, and the cover plate 20 is sealed between the filter container 2 and the cooling pipeline 1 by a sealing ring, so as to facilitate the disassembly and replacement of the filter plate 31. Of course, in order to reduce the gap between the spliced filter plates 31 and affect the filtering effect of the natural gas, the contact gap between the adjacent filter plates 31 can be arranged in a spiral structure; and in other embodiments, the filter element 3 can also be arranged in the form of a whole tube, and an axially extending opening is provided on one side to facilitate the overall disassembly and assembly.

[0052] Referring to Figure 1 and Figure 2 Figure 1 Figure 2 Finally, in order to accommodate the condensed water, the containing assembly 4 comprises an upper-opened condensing container 41 and a plurality of condensing plates 42 arranged in the condensing container 41, the upper opening edge of the condensing container 41 is fixed and connected to the bottom of the filter container 2, for example, the fixed connection can be achieved by flange connection.

[0053] The condensing plates 42 are divided into two groups and oppositely arranged, the side edges of the two groups of condensing plates 42 away from each other are respectively fixed to the inner walls of the condensing plates 42, the sides of the two groups of condensing plates 42 facing each other are inclinedly arranged towards the bottom, and the two groups of condensing plates 42 are arranged in a staggered manner to reduce the flow contact between the external flowing gas and the condensed water and reduce the secondary volatilization of the condensed water. At the same time, the bottom of the condensing container 41 is fixedly installed with a drain valve 43 for periodic drainage.

[0054] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A filter device for natural gas transmission, characterized by: The cooling pipeline (1) including the cooling drop equipment cooling site, the filter container (2) and the filter piece (3) outside the cooling pipeline (1) and the filter piece (3) outside the cooling pipeline (1) top; The filter piece (3) is sleeved with annular partition plate (21), the partition plate (21) is formed with backflow cavity (22) in the outer circle opposite the filter piece (3), the output end of the cooling pipeline (1) is communicated with the backflow pipe (11) for the backflow of the cooled natural gas to the backflow cavity (22), the backflow pipe (11) is at least partially located outside the filter container (2) and is provided with heating element (24) for heating; The bottom of the partition plate (21) is fixedly connected with the dehydration ring (23) outside the filter piece (3) top and the cooling pipeline (1), the dehydration ring (23) is concave to form tubular dehydration ring groove (231), the dehydration ring groove (231) is provided with a plurality of dehydration pipes (232) fixed to the partition plate (21) and communicated with the backflow cavity (22), the dehydration ring groove (231) contains the alkaline liquid dehydrating agent; The outer wall of the dehydration ring groove (231) is at least partially provided with air holes and is attached to the outer wall of the filter piece (3), the bottom of the filter container (2) is provided with a containing assembly (4) for containing condensed water, and the side of the filter container (2) is provided with an output end of natural gas.

2. The filter device for natural gas transmission according to claim 1, characterized in that: The top of the dehydration ring groove (231) is provided with an input valve (233) extending out of the filter container (2) for controlling the input of the alkaline liquid dehydrating agent; the bottom of the dehydration ring groove (231) is provided with an output valve (234) extending out of the filter container (2) for controlling the output of the alkaline liquid dehydrating agent.

3. The filter device for natural gas transmission according to claim 1, characterized in that: The filter piece (3) includes a plurality of filter plates (31) arranged around the cooling pipeline (1), the filter plate (31) is arc-shaped and attached to the outer wall of the cooling pipeline (1), the filter plate (31) is inserted from the top of the filter container (2), the inner circle of the partition plate (21) is attached to the outer wall of the filter plate (31), and the inner circle of the partition plate (21) extends towards the top wall of the filter container (2) and is fixed to the inner wall of the filter container (2), and the top of the filter container (2) is detachably fixed with a cover plate (20) covering and sealing the extended part of the filter plate (31).

4. The filter device for natural gas transmission according to claim 1, characterized in that: The outer wall of the cooling pipeline (1) inside the filter container (2) is provided with a plurality of cooling fins (12).

5. The filter device for natural gas transmission according to claim 4, characterized in that: A plurality of the cooling fins (12) are divided into a plurality of groups arranged around the cooling pipeline (1), and a plurality of the cooling fins (12) in the same group are distributed along the axial direction of the cooling pipeline (1) or the spiral direction with the axial direction of the cooling pipeline (1) as the spiral center.

6. The filter apparatus for natural gas transmission as claimed in claim 1, wherein: The corresponding inner and outer walls of the dehydration ring groove (231) are respectively provided with a plurality of buffer plates (235) distributed along the axial direction of the cooling pipeline (1), and the buffer plates (235) adjacent along the axial direction of the cooling pipeline (1) are respectively located on the opposite walls of the dehydration ring groove (231) and are arranged in a staggered manner.

7. The filter device for natural gas transmission according to any one of claims 1 to 6, characterized in that: The groove wall of the dewatering ring groove (231) is provided with a plurality of flow disturbing members (5), the flow disturbing members (5) comprise a floating plate (51) rotatably arranged on the inner wall of the dewatering ring groove (231) and a flow disturbing plate (52) rotatably arranged on the inner side of the dewatering ring (23) at the position corresponding to the circumferential side of the cooling pipeline (1), the rotation center of the flow disturbing plate (52) is coaxially connected to the rotation center of the floating plate (51) through a connecting shaft (53), and the floating plate (51) is floatingly arranged in the dewatering ring groove (231).

8. The filter device for natural gas transmission according to claim 7, characterized in that: The floating plate (51) is arranged along the central axis direction of the dewatering ring groove (231) and is provided with a floating cavity (511) at the top, and the thickness of the floating plate (51) gradually decreases from top to bottom.

9. The filter device for natural gas transmission according to any one of claims 1 to 6, characterized in that: The containing assembly (4) comprises an upper-opened condensing container (41) and a plurality of condensing plates (42) arranged in the condensing container (41), the upper opening edge of the condensing container (41) is fixedly connected to the bottom of the filtering container (2), the condensing plates (42) are divided into two groups and oppositely arranged, the side away from each other of the two groups of condensing plates (42) is fixedly arranged on the inner wall of the condensing plate (42), the side facing each other of the two groups of condensing plates (42) is obliquely arranged towards the bottom, and the two groups of condensing plates (42) are staggered with each other, and the bottom of the condensing container (41) is provided with a drain valve (43) for periodic drainage.

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