阅读说明：本技术 一种全通径管道式除砂器 (full-bore pipeline type desander ) 是由 王以斌 姚建军 常征 王文昊 李战杰 何龙辉 李津 王惠勤 杜富国 于 2018-07-19 设计创作，主要内容包括：本发明公开了一种全通径管道式除砂器。包括入口三通管、全通径清管阀、螺旋除砂段、流向调整出口、旁通接管、全通径球阀和储砂室,入口三通管由三通主管和三通支管组成,螺旋除砂段为螺旋除砂段内筒与螺旋除砂段外筒相互嵌套形成,流向调整出口为流向调整内筒与流向调整外筒相互嵌套形成,三通主管与螺旋除砂段内筒连通,螺旋除砂段内筒与流向调整内筒连通,螺旋除砂段外筒与流向调整外筒连通,旁通接管连通三通支管和支管进口,旋流除砂段外筒和旋流除砂段内筒之间的环形空间内设置螺旋叶片,旋流除砂段外筒底部于螺旋叶片下方设置一排排砂口,排砂口作为固液杂质进入储砂室的开口。使用本发明可在高效分离出油气中固体杂质的同时,清理砂过程中不影管道的正常输送。(The invention discloses full-bore pipeline type desander, which comprises an inlet three-way pipe, a full-bore cleaning pipe valve, a spiral desanding section, a flow direction adjusting outlet, a bypass connecting pipe, a full-bore ball valve and a sand storage chamber, wherein the inlet three-way pipe consists of a three-way main pipe and a three-way branch pipe, the spiral desanding section is formed by mutually nesting a spiral desanding section inner cylinder and a spiral desanding section outer cylinder, the flow direction adjusting outlet is formed by mutually nesting a flow direction adjusting inner cylinder and a flow direction adjusting outer cylinder, the three-way main pipe is communicated with the spiral desanding section inner cylinder, the spiral desanding section inner cylinder is communicated with the flow direction adjusting inner cylinder, the spiral desanding section outer cylinder is communicated with the flow direction adjusting outer cylinder, the bypass connecting pipe is communicated with the three-way branch pipe and a branch pipe inlet, a spiral blade is arranged in an annular space between the spiral desanding section outer cylinder and the spiral desanding section inner cylinder, a sand discharge port is arranged at the bottom of the spiral blade at the spiral desanding section outer cylinder, and the sand discharge port is used as an opening for enabling.)

The full-diameter pipeline type desander comprises a sand storage chamber (6) and is characterized in that the full-diameter pipeline type desander comprises an inlet three-way pipe (1), a full-diameter pipe cleaning valve (2), a spiral desanding section (3), a flow direction adjusting outlet (4), a bypass connecting pipe (7) and a full-diameter ball valve (5), the inlet three-way pipe (1) consists of a three-way main pipe (1.1) and a three-way branch pipe (1.2), the spiral desanding section (3) is a structure formed by mutually nesting an inner barrel (3.4) of the spiral desanding section and an outer barrel (3.3) of the spiral desanding section, the inner barrel (3.4) of the spiral desanding section and the outer barrel (3.3) of the spiral desanding section are coaxially arranged, the inlet (3.1) of the main pipe (3.4) of the spiral desanding section is a main pipe inlet (3.1) of the main pipe, the spiral desanding section is communicated with the inner barrel (3.4), the flow direction adjusting outlet of the spiral desanding section is a spiral desanding section, the spiral desanding section is communicated with the inner barrel (3.4), the flow direction adjusting outlet of the spiral desanding section (3.4), the spiral desanding section is arranged at the inner barrel (3.4), the inner barrel inlet of the spiral desanding section and the spiral desanding section, the inner barrel (3.4), the spiral desanding section, the inner barrel (3.4), the spiral desanding section are horizontally arranged in the inner barrel, the inner barrel (3.4), the flow direction adjusting outlet) of the inner barrel (3.4), the spiral desanding section, the inner barrel (3.4), the flow direction adjusting outlet of the spiral desanding section, the spiral desanding section is communicated with the outer barrel (3.4), the inner barrel (3.4), the spiral desanding section, the inner barrel (3.4), the spiral desanding section is communicated with the outer barrel inlet of the outer barrel (3.4), the spiral desanding section, the outer barrel (3.4), the spiral sand removing section, the spiral.

2. The full-bore pipeline-type desander as claimed in claim 1, wherein the number of the sand discharge openings (3.7) is 3-5, and the diameter of each sand discharge opening (3.7) is 0.1-0.3 times of the diameter of the outer cylinder (3.3) of the cyclone sand removal section.

3. The full-bore pipeline-type desander as claimed in claim 1, wherein the helical blade (3.5) is a structure formed by rotating a flat plate in a spiral shape, and the helical inclination angle of the helical blade (3.5) is between 5 and 15 degrees.

4. The full-bore pipeline-type desander as claimed in claim 1, wherein the part of the flow direction adjustment inner cylinder (4.2) extending into the flow direction adjustment outer cylinder (4.3) is uniformly distributed with round holes, the diameter of the holes of the round holes is 10-50 mm, the percentage of the holes is 50-60%, and the sum of the areas of the holes is 1-3 times of the area of the cross section of the flow direction adjustment inner cylinder (4.2).

5. The full-bore pipeline-type desander as claimed in claim 1 or 4, wherein the end of the flow direction adjustment outer cylinder (4.3) is fixed on the outer wall of the flow direction adjustment inner cylinder (4.1), the end is a natural gas inlet (4.4) of the flow direction adjustment outlet (4), and the natural gas inlet (4.4) and the spiral desanding section outlet (3.6) are matched with each other.

6. The full-bore pipeline-type desander as claimed in claim 5, wherein the end of the flow direction adjustment outer cylinder (4.3) is fixed on the outer wall of the flow direction adjustment inner cylinder (4.1) by welding, and the natural gas inlet (4.4) and the spiral desanding section outlet (3.6) are connected by flanges.

7. The full-bore pipeline-type desander as claimed in claim 1, wherein the sand storage chamber (6) is a horizontal cylinder structure with circular end sockets at both ends, a sand inlet (6.2) corresponding to the sand discharge port (3.7) is arranged right above the sand storage chamber, and each group of sand discharge ports (3.7) and the sand inlet (6.2) are connected through a full-bore ball valve (5).

Technical Field

The invention belongs to the technical field of centrifugal separation and flow guarantee, and relates to full-bore pipeline type desanders.

Background

The characteristic of natural gas determines that natural gas pipeline transmission is more economical and reliable than other transmission modes, and the natural gas pipeline transmission is the main mode of natural gas transmission on land at present. The main sources of liquid and solid impurities in natural gas transportation systems include: condensate oil, condensate water and rock debris dust brought underground during gas production; dirt and residue left during pipeline construction; scrap iron and corrosion products inside the tube.

The dust particles such as sand, rust and the like move along with high-speed airflow to cause strong abrasion to the inner wall of a pipeline, the requirement on the content of solid impurities is high in the high-speed rotation process of an impeller of a compressor serving as main power equipment in the gas transmission process, and other metering instruments are prone to causing inaccurate or even failure of instrument metering due to abrasion of the solid particles, separators, dust collectors and filters are arranged at a gas collecting station, a gas pressing station, a gas distribution station, a pressure regulating metering station and the like to remove various solid (liquid) impurities carried in natural gas, wherein the gravity separator and the cyclone separator are applied to .

The sand removing process of the station is complex, the occupied area is large, and various supporting facilities are needed to ensure the smooth operation of the separation and dust removal process; for long-distance pipelines, pipelines between stations are often dozens of kilometers or even longer, and during the period, solid impurities such as corrosion products and the like carried by branch pipelines and generated by the pipelines are difficult to be treated in time.

A related device for removing sand by using a spiral structure is precedent, for example, a Chinese patent with application number of 96118733.6 discloses a crude oil wellhead pipe flow sand remover which comprises an spiral pipeline, a sand outlet is arranged at the end port of the spiral pipeline, a wedge is arranged at the intersection of the pipeline and the sand outlet and can directly remove sand from the pipeline by means of residual energy of an oil well without external driving force, the Chinese patent with application number of 201410815080.6 discloses a spiral sand remover which comprises a spiral separating pipe, a sand outlet short section, a replacement sand storage tank and a spiral separating pipe mounting frame, a feed inlet at the lower end of the spiral separating pipe is connected with a shaft bottom return liquid pipeline, a liquid outlet at the upper end of the spiral separating pipe is connected with a ground water collecting pipeline, a plurality of blocking type sand outlets are arranged on the outer peripheral surface of the spiral separating pipe, each sand outlet is communicated with a closed replacement sand storage tank through a pipeline, a sand discharging outlet is arranged at the bottom of the replacement sand storage tank, sand-containing reverse drainage liquid enters a feed inlet at the lower end of the spiral separating pipe, the spiral separating pipe and flows upwards at a high speed, sand particles in a spiral separating pipe are discharged into a coarse sand storage tank along the spiral separating wall of the spiral separating pipe, the sand storage tank is reasonably limited by the spiral separating effect of the spiral separating liquid separating pipe, the spiral separating pipe is too coarse sand-separating pipe, the spiral separating pipe, the sand-separating liquid discharging sand-discharging.

Disclosure of Invention

The invention provides full-bore pipeline type desanders aiming at the defects of complex installation, poor separation effect and the like in the prior art, and the technology can efficiently separate solid impurities in natural gas and simultaneously facilitate the passing of a pipe cleaner in the pipe cleaning process.

The invention provides full-bore pipeline type desander, which comprises a sand storage chamber and is characterized in that the full-bore pipeline type desander comprises an inlet three-way pipe, a full-bore pigging valve, a spiral desanding section, a flow direction adjusting outlet, a bypass connecting pipe and a full-bore ball valve, wherein the inlet three-way pipe comprises a three-way main pipe and a three-way branch pipe, the spiral desanding section is a structure formed by mutually nesting an inner barrel of the spiral desanding section and an outer barrel of the spiral desanding section, the inner barrel of the spiral desanding section and the outer barrel of the spiral desanding section are coaxially arranged, an inlet end of the inner barrel of the spiral desanding section is a main pipe inlet, an end of the outer barrel of the spiral desanding section is an installation opening of the inner barrel of the spiral desanding section, an end is an outlet of the spiral desanding section, a side surface of the outer barrel of the spiral desanding section is provided with a branch pipe inlet, a branch pipe inlet is arranged on a side surface of the outer barrel of the spiral desanding section, the branch pipe inlet is positioned on a dry gas inlet side, the diameter of the branch pipe is the same as the diameter of the three-way branch pipe, the outer barrel, the flow direction of the flow direction adjusting outlet is in a horizontal direction, the flow direction adjusting outlet is a structure formed by mutually forming by mutually by nesting the inner barrel of the spiral desanding section, the spiral desanding inner barrel and the spiral desanding section, the spiral desanding inner barrel, the spiral desanding section, the spiral adjusting outlet, the spiral desanding section is arranged in a spiral adjusting outlet, the spiral adjusting inner barrel, the spiral adjusting outlet, the spiral adjusting section.

The invention is technically characterized in that the number of the sand discharge openings is 3-5, and the diameter of each sand discharge opening is 0.1-0.3 times of the diameter of the outer cylinder of the cyclone sand removal section.

The invention is technically characterized in that the helical blade is a structure formed by rotating a flat plate in a helical manner, and the helical inclination angle of the helical blade is between 5 and 15 degrees.

The step of the invention is technically characterized in that the part of the flow direction adjusting inner cylinder, which extends into the flow direction adjusting outer cylinder, is uniformly distributed with round holes, the diameter of each round hole is 10-50 mm, the aperture ratio is 50-60%, and the sum of the aperture areas is 1-3 times of the cross-sectional area of the flow direction adjusting inner cylinder.

The invention is technically characterized in that the end of the flow direction adjusting outer cylinder is fixed on the outer wall of the flow direction adjusting inner cylinder, the other end is a natural gas inlet of the flow direction adjusting outlet, and the natural gas inlet is matched with the outlet of the spiral desanding section.

The invention is technically characterized in that steps are carried out, wherein the end of the flow direction adjusting outer cylinder is fixed on the outer wall of the flow direction adjusting inner cylinder in a welding mode, and a natural gas inlet is connected with an outlet of the spiral desanding section through a flange.

The invention is technically characterized in that the sand storage chamber is of a horizontal cylinder structure with round end sockets at two ends, a sand inlet corresponding to the sand discharge port is arranged right above the sand storage chamber, and each group of sand discharge ports and the sand inlet are connected through a full-bore ball valve.

The method for removing sand from natural gas by adopting the full-bore pipeline type sand remover comprises the steps that natural gas containing solid impurities crosses a full-bore cleaning pipe valve from a three-way branch pipe of an inlet three-way pipe through a bypass connecting pipe during a normal sand removing process, enters a spiral sand removing section through a branch pipe inlet, performs spiral motion in a spiral blade between an inner cylinder of the spiral sand removing section and an outer cylinder of the spiral sand removing section, the solid impurities in the natural gas in a spiral flow channel are transported to the inner wall surface of the outer cylinder of the spiral sand removing section under the action of centrifugal force, the solid impurities transported to the inner wall surface of the outer cylinder of the spiral sand removing section flow out of the spiral sand removing section through a sand discharge port, then enter a sand storage chamber through a full-bore ball valve through a sand inlet to be stored, the natural gas without the solid impurities enters an annular space formed by a flow direction adjusting outlet and a flow direction adjusting inner cylinder, enters the flow direction adjusting inner cylinder through a circular hole channel on the, then flows to the natural gas outlet to the downstream of the desander. When solid impurities are cleaned, the full-bore ball valve communicated with the spiral sand removing section and the sand storage chamber is closed, the flange sealing covers at two ends of the sand storage chamber are opened to clean the solid impurities in the sand storage chamber, and the full-bore ball valve is opened after the sand storage chamber is installed and fixed again. And in the pigging process, the full-bore pigging valve is opened, the pipe cleaner flows to the downstream through the desander through the three-way main pipe of the inlet three-way pipe, the full-bore ball valve, the inner barrel of the rotational flow desanding section and the inner barrel of the flow direction adjusting outlet, and then the full-bore pigging valve is closed and converted into the desanding process through the pigging process.

Compared with the prior art, the invention has the advantages that the technology adopts a spiral runner centrifugal separation mode, the separation mode is efficient, the separation efficiency is high, no filtering component is adopted in the structure of the technology, the trouble of blocking inside the desander can be permanently eliminated, the installation mode of the technology is the same as that of a common valve , the installation can be carried out in the horizontal or vertical direction, no extra space is occupied, no auxiliary facility is needed, the desanding working condition and the pipe cleaning working condition are considered, and the use is more convenient.

The structural layout, operation flow, etc. of the present invention will be described in further detail in with reference to the drawings and the detailed description, but not to limit the scope of the invention.

Drawings

FIG. 1 is a schematic view of full-bore pipeline-type desander.

FIG. 2 is a three-dimensional view of full-bore ducted desanders of the present invention.

FIG. 3 is a simplified structure diagram of an inlet tee of full-bore pipeline desander of the present invention.

FIG. 4 is a simplified structural diagram of the spiral grit removal section of full-bore ducted desanders of the present invention.

FIG. 5 is a simplified structure diagram of a bypass connection pipe of full-bore pipeline-type desander of the present invention.

FIG. 6 is a simplified structural view of the flow direction adjustment outlet of full-bore ducted desanders of the present invention.

FIG. 7 is a three-dimensional view of the flow direction adjustment outlet of full-bore ducted desanders of the present invention.

FIG. 8 is a simplified structural view of a sand storage chamber of full-bore pipeline-type desander of the present invention.

Like reference numerals in fig. 1 to 8 denote like features.

Wherein, in FIGS. 1-8: 1-inlet three-way pipe, 1.1-three-way main pipe, 1.2-three-way branch pipe, 2-full-bore pigging valve, 3-cyclone desanding section, 3.1-dry pipe inlet, 3.2-branch pipe inlet, 3.3-cyclone desanding section outer cylinder, 3.4-cyclone desanding section inner cylinder, 3.5-helical blade, 3.6-cyclone desanding section outlet, 3.7-sand outlet, 4-flow direction adjusting outlet, 4.1-natural gas outlet, 4.2-flow direction adjusting outlet inner cylinder, 4.3-flow direction adjusting outlet outer cylinder, 4.4-natural gas inlet, 5-full-bore ball valve, 6-sand storage chamber, 6.1-sand storage chamber cylinder, 6.2-sand inlet and 7-bypass connecting pipe.

Detailed Description

Referring to fig. 1-8, the full-bore pipeline type desander comprises an inlet three-way pipe 1, a full-bore pipe cleaning valve 2, a spiral desanding section 3, a flow direction adjusting outlet 4, a bypass connecting pipe 7, a full-bore ball valve 5 and a sand storage chamber 6, wherein the inlet three-way pipe 1 consists of a three-way main pipe 1.1 and a three-way branch pipe 1.2, the spiral desanding section 3 is a structure formed by mutually nesting a spiral desanding section inner cylinder 3.4 and a spiral desanding section outer cylinder 3.3, the spiral desanding section inner cylinder 3.4 and the spiral desanding section outer cylinder 3.3 are coaxially arranged, an inlet end of the spiral desanding section inner cylinder 3.4 is a main pipe inlet 3.1, an end of the spiral desanding section outer cylinder 3.3.3 is an installation opening of the spiral desanding section inner cylinder 3.4, an end of another end is a spiral desanding section outlet 3.6, a side surface of the spiral desanding section outer cylinder 3.3.3.3.3.3 is provided with a branch pipe inlet 3.2, a branch pipe inlet 3.2 of the spiral desanding section outer cylinder 3.3.3, a branch pipe inlet of the branch pipe 3.3.3.2 is arranged on a side surface of the spiral desanding section, a branch pipe inlet 3.2 of the branch pipe inlet of the branch pipe 3.2, a branch pipe inlet of the spiral desanding section is close to a dry gas inlet 3.2, a spiral desanding section inlet 3.2.2, a spiral groove, a spiral desanding section inlet of the inner cylinder 3.2 inlet of the spiral desanding section is a spiral groove, a spiral desanding section 3.4 inlet of the inner cylinder 3.4 inlet, a spiral desanding section is a spiral groove, a spiral groove is a spiral groove, a spiral groove is formed by a spiral groove, a spiral groove is formed by a spiral groove, a spiral groove.

The helical blade 3.5 is a structure formed by rotating a flat plate in a helical shape, and the helical blade 3.5 is positioned in an annular space between the inner barrel 3.4 of the helical desanding section and the outer barrel 3.3 of the helical desanding section to form a helical flow passage. The spiral inclination angle is between 5 and 15 degrees, when the spiral inclination angle is too small, the flow channel is narrow, the migration distance of sand grains is increased under the same flow area, and when the spiral inclination angle is too large, the space length of the spiral blade 3.5 is increased under the same spiral turns. Impurities such as sand and the like are thrown to the inner wall surface of the outer barrel 3.3 of the spiral desanding section under the action of a centrifugal force field in the flowing process of the incoming natural gas in the spiral channel.

The outlet end of the flow direction adjusting inner cylinder 4.2 is a natural gas outlet 4.1, the part of the flow direction adjusting inner cylinder 4.2 extending into the flow direction adjusting outer cylinder 4.3 is uniformly distributed with round holes, and is a flow channel of natural gas in an annular space flowing to the flow direction adjusting inner cylinder 4.2, the diameter of an opening is between 10 and 50mm, the opening rate is between 50 and 60 percent, the sum of the opening areas is not smaller than the cross-sectional area of the flow direction adjusting inner cylinder 4.2, the opening is a channel of the annular space formed by the natural gas flow direction adjusting inner cylinder 4.2 in the flow direction adjusting inner cylinder 4.2 and the flow direction adjusting outer cylinder 4.3, the end of the flow direction adjusting outer cylinder 4.3 is fixed on the outer wall of the flow direction adjusting inner cylinder 4.1, good sealing is formed by adopting a welding mode, the other end is a natural gas inlet 4.4 of the flow direction adjusting outlet 4, and the natural gas.

In the sand removing process, natural gas forms an annular space through the flow direction adjusting inner cylinder 4.1 and the flow direction adjusting outer cylinder 4.3, enters the flow direction adjusting inner cylinder 4.2 through the circular hole channel and then flows to the natural gas outlet 4.1; during the pigging process, natural gas directly flows to the downstream through the flow direction adjusting inner barrel 4.2 of the flow direction adjusting outlet 4.

The size of the inlet three-way pipe 1 adopts the general size of a three-way standard part, and the nominal diameter of the three-way branch pipe 1.2 is 1-2 levels lower than that of the three-way main pipe 1.1. The main tee pipe 1.1 is a channel of a pipe cleaner during a pipe cleaning process, and the branch tee pipe 1.2 is a channel through which natural gas flows to the spiral desanding section 3 during a normal desanding process. Three openings of the inlet three-way pipe 1 are all in a flange connection mode, and the disassembly is convenient.

The sand storage chamber 6 is a horizontal cylinder structure with circular end sockets at two ends, a sand inlet 6.2 corresponding to the sand discharge port 3.7 is arranged right above the sand storage chamber, each group of sand discharge ports 3.7 is connected with the sand inlet 6.2 through a full-bore ball valve 5, the sand storage chamber 6 is mainly used for storing solid impurities, flow dead zones are formed in the actual operation process, the space size is moderate, the treatment period is too short if the space is too small, the whole sand removing device is too heavy if the space is too large, and the treatment period is controlled to be about 2-6 months.

The material of each component of the present invention is typically stainless steel (e.g., 304 stainless steel) and the connections between the components are typically welded.

As shown in the attached figure 1, the working process of the invention is as follows: in the normal desanding process, natural gas containing solid impurities crosses the full-drift diameter pipe cleaning valve 2 from a three-way branch pipe 1.2 of the inlet three-way pipe 1 through a bypass connecting pipe 7, enters the spiral desanding section 3 through a branch pipe inlet 3.2, carries out spiral motion in a spiral blade 3.5 between an inner cylinder 3.4 of the spiral desanding section and an outer cylinder 3.3 of the spiral desanding section, transports the solid impurities in the natural gas in a spiral flow channel to the inner wall surface of the outer cylinder 3.3 of the spiral desanding section due to the centrifugal force, flows out of the spiral desanding section 3 through a sand discharge port 3.7, then enters a sand storage chamber 6 through a full-drift diameter ball valve 5 through a sand inlet 6.2 to be stored, and then enters an annular space formed by a flow direction adjusting inner cylinder 4.1 of the flow direction adjusting outlet 4 and a flow direction adjusting outer cylinder 4.3 through a channel on a circular hole on the flow direction adjusting inner cylinder 4.2 to adjust the flow direction, and then flows to the natural gas outlet 4.1 to the downstream of the desander. When solid impurities are cleaned, the full-bore ball valve 5 of the communicated spiral desanding section 3 and the sand storage chamber 6 is closed, the flange sealing covers at two ends of the sand storage chamber 6 are opened to clean the solid impurities in the sand storage chamber 6, and the full-bore ball valve 5 is opened after the sand storage chamber 6 is installed and fixed again. And in the pigging process, the full-drift diameter pigging valve 2 is opened, a pipe cleaner flows to the downstream through a desander through a tee main pipe 1.1 of the inlet tee pipe 1, the full-drift diameter ball valve 2, the inner barrel 3.4 of the rotational flow desanding section and the inner barrel 4.2 of the flow direction adjusting outlet, and then the full-drift diameter pigging valve 2 is closed to be converted into the desanding process through the pigging process.