阅读说明：本技术 一种使用双级直流旋风分离器的干气密封气源处理系统 (Dry gas sealing gas source processing system using two-stage direct-current cyclone separator ) 是由 白俊国 唐启辉 刘佳龙 黄浩宇 刘斯文 胡怡婷 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种使用双级直流旋风分离器的干气密封气源处理系统,包括一级分离器和二级过滤系统,其特征在于：所述一级分离器采用双级直流旋风分离器,所述直流旋风分离器包括壳体,壳体内设置有隔板,隔板将壳体内腔分隔为前端分离腔和后端分离腔,其内均设置有进气管、排气管、导流体和导向叶片,还设置有锥形罩,进气管上设置有侧缝。本发明相比现有技术具有以下优点：一级分离器选用双级直流分离器中,能够实现同时对液体和气体的分离,双级串联的设计形成多级分离有效增强分离效率,此外侧缝的设计还有效减少整个旋风分离器的压力损失；结合二级过滤系统的使用,有效保证干气密封系统低成本运营。(The invention discloses a dry gas sealing gas source processing system using a two-stage direct-current cyclone separator, which comprises a first-stage separator and a second-stage filtering system, and is characterized in that: the one-level separator adopts a two-stage direct-current cyclone separator, the direct-current cyclone separator comprises a shell, a partition plate is arranged in the shell, an inner cavity of the shell is divided into a front-end separation cavity and a rear-end separation cavity by the partition plate, an air inlet pipe, an exhaust pipe, a flow guide body and guide blades are arranged in the front-end separation cavity, a conical cover is further arranged, and a side seam is formed in the air inlet pipe. Compared with the prior art, the invention has the following advantages: the first-stage separator adopts a two-stage direct-current separator, so that liquid and gas can be separated simultaneously, the two-stage series design forms multi-stage separation, the separation efficiency is effectively enhanced, and the design of the side seam also effectively reduces the pressure loss of the whole cyclone separator; the use of combining second grade filtration system effectively guarantees the low-cost operation of dry gas seal system.)

1. The utility model provides an use dry gas seal gas source processing system of doublestage direct current cyclone, includes one-level separator and second grade filtration system, its characterized in that: the first-stage separator adopts a two-stage direct-current cyclone separator, the direct-current cyclone separator comprises a shell, a main air inlet and a main air outlet are respectively arranged at two ends of the shell, a partition plate is arranged in the shell and divides an inner cavity of the shell into a front-end separation cavity and a rear-end separation cavity, the front-end separation cavity and the rear-end separation cavity are identical in structure, an air inlet pipe, an exhaust pipe, a flow guide body and guide blades are arranged in the front-end separation cavity and the rear-end separation cavity, the head end of the air inlet pipe is an air inlet, the tail end of the exhaust pipe is an air outlet, the flow guide body is arranged in the air inlet pipe and close to the air inlet, the guide blades are arranged on the outer side surface of the flow guide body, the head end of the exhaust pipe points to the tail end of the air inlet pipe, a conical cover is further arranged, the air inlet penetrates through the side wall of the shell or the partition plate and extends out of the separation cavity to be connected with the air outlet or the total air inlet of the front-end separation cavity, and the air outlet penetrates through the side wall of the shell or the partition plate and extends out of the front-end separation cavity to be connected with the air inlet or the total air outlet of the rear-end separation cavity.

2. The dry gas seal gas source treatment system using a dual stage once-through cyclone separator of claim 1, wherein: a sewage draining outlet is arranged at the bottom of the shell.

3. The dry gas seal gas source treatment system using a dual stage once-through cyclone separator of claim 1, wherein: the head end of the exhaust pipe extends into the bottom opening of the conical cover.

4. The dry gas seal gas source treatment system using a dual stage once-through cyclone separator of claim 1, wherein: the side wall of the air inlet pipe is provided with side seams, the side seams are arranged on the pipe wall of the air inlet pipe along a spiral line direction perpendicular to the air flow movement direction, more than one side seam is arranged, and the side seams are symmetrically arranged around the air inlet pipe.

5. The dry gas seal gas source treatment system using a dual stage once-through cyclone separator of claim 4, wherein: the side seam sets up in the tail end of intake pipe, the point portion of toper cover stretches into the tail end of intake pipe, and the point portion top position of toper cover does not exceed the position that the side seam is close to air inlet one end.

6. The dry gas seal gas source treatment system using a dual stage once-through cyclone separator of claim 1, wherein: a transition straight cylinder is also arranged at the opening at the bottom of the conical cover.

7. The dry gas seal gas source treatment system using a dual stage once-through cyclone separator of claim 6, wherein: and a wire mesh is also arranged between the inner wall of the transition straight cylinder and the outer wall of the exhaust pipe.

8. The dry gas seal gas source treatment system using a dual stage once-through cyclone separator of claim 1, wherein: the head end of the exhaust pipe is provided with an air inlet structure, the air inlet structure is composed of a conical cylinder section and a straight cylinder section, one end with the smaller inner diameter of the conical cylinder section is connected with the straight cylinder section, and one end with the larger inner diameter of the conical cylinder section is connected with the exhaust pipe main body.

9. The dry gas seal gas source treatment system using a dual stage once-through cyclone separator of claim 1, wherein: the guide blades are guide vane type blades or spiral type blades.

Technical Field

The invention relates to the technical field of natural gas impurity separation, in particular to a dry gas sealing gas source processing system using a two-stage direct-current cyclone separator.

Background

The natural gas long-distance pipeline needs to establish a booster station along the way, and realizes the long-distance transportation of the natural gas through the multistage compression of the compressor. The compressor is the heart transported by the natural gas pipeline, the safety and the reliability of the operation of the compressor are related to whether the unit can stably work for a long period, and once the unit breaks down due to sealing, the downstream gas supply is directly influenced.

In order to prevent or inhibit the leakage of these gases to the atmosphere along the rotary shaft end of the compressor, various shaft end sealing devices must be adopted so as to maintain the normal operation of the main machine of the compressor, reduce the consumption of materials and energy, prevent environmental pollution and protect the safety of equipment. The dry gas sealing system at the shaft end of the compressor is one of important technologies, working gas sealed at the shaft end of the compressor generally uses process gas at the outlet end of a unit, but solid or liquid impurities in a natural gas long-distance pipeline can cause damage to a dynamic ring and a static ring of a dry gas seal if entering the dry gas sealing system of the centrifugal compressor, so that a dry gas sealing filter element of a compressor unit of a gas station of a gas pipeline is frequently replaced, the service life of the dry gas sealing filter element is shortened, the leakage rate of natural gas is increased, the compressor is stopped, the safe operation of the compressor unit is seriously affected, and damage is caused to precision equipment such as a downstream pressure regulator, a downstream flowmeter and the like. The gas quality can not meet the air inlet requirement of a dry gas sealing system of the compressor, and the safe operation of a compressor unit can not be ensured by the conventional dry gas sealing system.

The process gas used by the dry gas sealing system has the characteristics of low flow rate, low flow and high pressure, the pressure loss is required to be small in the purification process, the impurity states are various, and the gas and the solid are available.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a dry gas sealing gas source treatment system using a double-stage direct-current cyclone separator.

The invention is realized by the following technical scheme: the utility model provides an use dry gas seal gas source processing system of doublestage direct current cyclone, includes one-level separator and second grade filtration system, its characterized in that: the one-level separator adopts doublestage direct current cyclone, and direct current cyclone includes the casing, is provided with total air inlet and total gas outlet, its characterized in that respectively at casing both ends: a clapboard is arranged in the shell and divides the inner cavity of the shell into a front-end separation cavity and a rear-end separation cavity which have the same structure, the air inlet pipe is arranged in the air inlet pipe, the exhaust pipe is arranged in the air inlet pipe, the flow guide body and the guide blades are arranged at the tail end of the air inlet pipe, the tail end of the exhaust pipe is an air inlet, the flow guide body is arranged in the air inlet pipe and close to the air inlet, the guide blades are arranged on the outer side surface of the flow guide body, the tail end of the head end of the exhaust pipe points to the air inlet pipe, a conical cover is further arranged between the air inlet pipe and the exhaust pipe, the tail end of the point portion of the conical cover points to the air inlet pipe, the head end of the bottom opening of the conical cover points to the exhaust pipe, the air inlet penetrates through the side wall of the shell or the partition plate and stretches out of the separation cavity and is connected with the.

As a further improvement to the above scheme, a sewage draining outlet is arranged at the bottom of the shell.

As a further improvement to the above, the head end of the exhaust pipe extends into the bottom opening of the conical cover.

As a further improvement of the scheme, the side seam is arranged on the side wall of the air inlet pipe, the side seam is arranged on the pipe wall of the air inlet pipe along the direction of a spiral line vertical to the moving direction of the airflow, more than one side seam is arranged, and the side seams are symmetrically arranged around the air inlet pipe.

As a further improvement to the above scheme, the side seam is arranged at the tail end of the air inlet pipe, the tip of the conical cover extends into the tail end of the air inlet pipe, and the top end of the tip of the conical cover does not exceed the position of one end, close to the air inlet, of the side seam.

As a further improvement to the scheme, a transition straight cylinder is further arranged at the opening at the bottom of the conical cover.

As a further improvement to the scheme, a wire mesh is further arranged between the inner wall of the transition straight cylinder and the outer wall of the exhaust pipe.

As a further improvement to the above scheme, the head end of the exhaust pipe is provided with an air inlet structure, the air inlet structure is composed of a conical cylinder section and a straight cylinder section, one end with the smaller inner diameter of the conical cylinder section is connected with the straight cylinder section, and one end with the larger inner diameter of the conical cylinder section is connected with the exhaust pipe main body.

As a further improvement to the above solution, the guide blades are guide vane blades or helical blades.

Compared with the prior art, the invention has the following advantages: the two-stage direct-current separator is selected as the first-stage separator, so that liquid and gas can be separated at the same time, the liquid can be quickly separated and discharged through the design of the side seam, and the solid can be effectively isolated outside the exhaust pipe through the design of the conical cover; the two-stage series design forms multi-stage separation, so that the separation efficiency is effectively enhanced, and the design of the outer side seam also effectively reduces the pressure loss of the whole cyclone separator; the requirements of high efficiency and low wind resistance are met through multiple designs; and the use of a secondary filtering system is combined, so that the low-cost normal operation of the dry gas sealing system is ensured.

Drawings

FIG. 1 is a schematic of the present invention.

Fig. 2 is a schematic structural diagram of a double-impact direct-current cyclone separator.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

The utility model provides an use dry gas seal gas source processing system of doublestage direct current cyclone, includes one-level separator 1 and second grade filtration system 2, its characterized in that: the first-stage separator 1 adopts a two-stage direct-current cyclone separator, the direct-current cyclone separator comprises a shell 3, a main air inlet 31 and a main air outlet 32 are respectively arranged at two ends of the shell 3, a partition plate 33 is arranged in the shell 3, the inner cavity of the shell 3 is divided into a front-end separation cavity 91 and a rear-end separation cavity 92 by the partition plate 33, the front-end separation cavity 91 and the rear-end separation cavity 92 are identical in structure, an air inlet pipe 4, an exhaust pipe 5, a flow guide body 7 and guide blades 71 are respectively arranged in the front-end separation cavity 91 and the rear-end separation cavity 92, the head end of the air inlet pipe 4 is an air inlet 41, the tail end of the exhaust pipe 5 is an air outlet 51, the flow guide body 7 is arranged in the air inlet pipe 4 and close to the air inlet 41, the guide blades 71 are arranged on the outer side surface of the flow guide body 7, the head, the bottom opening of the conical cover 6 is directed towards the head end of the exhaust duct 5, the air inlet 41 extends through the side wall or partition 33 of the housing 3 out of the separation chamber and is connected with the air outlet 51 or the total air inlet 31 of the front end separation chamber 91, and the air outlet 51 extends through the side wall or partition 33 of the housing 3 out of the front end separation chamber and is connected with the air inlet 41 or the total air outlet 32 of the rear end separation chamber 92. The existing straight-flow type cyclone dust collector utilizes the rotation of airflow to enable impurities in the airflow to be centrifuged to the periphery, the air at the central part is taken and conveyed to the next process, the impurities at the peripheral part are discharged together with the air, thus, a large amount of target gas loss is caused, the discharged impurity-containing gas cannot be directly discharged, additional processes and devices are needed for secondary purification, and the pressure loss is large. The casing 3 is designed to seal the impurity-containing gas at the peripheral part in the casing 3, but along with the separation, when the air pressure inside and outside the air inlet pipe 4 and the air outlet pipe 5 is balanced, part of the impurity-containing gas can flow back through the impurity-removing channel to cause entrainment and back mixing. The scheme breaks through the traditional design thought, all the rotating gas sent by all the gas inlet pipes 4 is guided into the shell 3 by designing the conical cover 6, the rotating gas continuously rotates in the shell 3, so that impurities are decelerated through frictional collision with the inner walls of the gas inlet pipes 4, then subsided after being decelerated through frictional collision with the inner walls of the shell 3, and then the gas enters the gas outlet pipe 5 in the opening at the bottom of the conical cover 6 through baffling, and the separation effect on the impurities is effectively enhanced due to the fact that the inner diameters of the gas inlet pipes 4 and the shell 3 are different; meanwhile, due to the limitation of the length of the pipe, in the traditional dry gas sealing gas source processing system, some impurities which move close to the axis do not have to move to the periphery and directly enter the exhaust pipe 5, the conical cover 6 is shielded between the gas inlet pipe 4 and the exhaust pipe 5, so that the phenomenon is thoroughly avoided, and the impurities which move on the axis can be forcibly pushed to be far away from the axis after encountering the conical cover 6 and then are settled through the air flow rotating centrifugal separation. So improve the separation efficiency of first grade separator 1 greatly, effectively ensured the life of 2 filter cores of second grade filtration system.

A waste outlet 34 is provided at the bottom of the housing 3.

The head end of the exhaust pipe 5 protrudes into the bottom opening of the conical cover 6. Because the air current is in the rotation state all the time in whole device, stretch into the bottom opening of conical cover 6 with the head end of blast pipe 5 in can let gas entering blast pipe 5 before through the centrifugal separation of one section conical surface inner wall again, so form multi-stage separation, make gas through many times separation effect, improve separation efficiency.

The side wall of the air inlet pipe 4 is provided with side seams 42, the side seams 42 are arranged on the pipe wall of the air inlet pipe 4 along a spiral line direction perpendicular to the air flow moving direction, more than one side seam 42 is arranged, and the more than one side seam 42 is symmetrically arranged around the air inlet pipe 4. The design of the side seams 42 can help to quickly discharge impurities moving along the pipe wall in the air inlet pipe 4, and more importantly, the escape passage of the air in the air inlet pipe 4 is increased, and simultaneously enough wall surfaces are kept for collision and deceleration of the impurities, so that the pressure loss of the whole cyclone separator can be reduced.

The side seam 42 is arranged at the tail end of the air inlet pipe 4, the tip part of the conical cover 6 extends into the tail end of the air inlet pipe 4, and the top end position of the tip part of the conical cover 6 does not exceed the position of one end, close to the air inlet 41, of the side seam 42. The point portion of conical cover 6 stretches into intake pipe 4 and can make whole device design compacter, form the annular space between the lateral wall of conical cover 6 and the 4 tail ends of intake pipe, conical cover 6 has occupied 41 tail end centers "invalid" region of air inlet like this, force the air current to peripheral motion, impurity in making the air current through the annular space obtains effective separation, conical cover 6 point portion and the design of side seam 42 position overlapping, can effectively reduce because of conical cover 6 stretches into the air-resistor that intake pipe 4 brought, and more gas can promote the impurity of the separation on the 4 inner walls of intake pipe to discharge fast when flowing out by side seam 42.

A transition straight cylinder 61 is also arranged at the bottom opening of the conical cover 6. The design of the transition straight cylinder 61 can effectively reduce the pressure drop when the airflow passes through the outer side of the conical cover 6.

Still be provided with wire mesh 8 between the straight section of thick bamboo 61 inner wall of transition and the blast pipe 5 outer wall, wire mesh 8 can prevent effectively that the liquid drop from getting into in the blast pipe 5.

The head end of the exhaust pipe 5 is provided with an air inlet structure, the air inlet structure is composed of a conical cylinder section 52 and a straight cylinder section 53, one end of the conical cylinder section 52 with the smaller inner diameter is connected with the straight cylinder section 53, and one end of the conical cylinder section 52 with the larger inner diameter is connected with the exhaust pipe 5 main body. The design of the air inlet structure can give consideration to both the separation efficiency and the pressure drop loss.

The guide vane 71 may be a vane type vane or a spiral type vane.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.