A filter device suitable for purifying dry gas seal gas

Abstract

The application discloses a filter device for purifying dry gas sealing gas, which comprises a filter cavity, and inlet side pressing end covers (22) and outlet side pressing end covers (21) are fixed at two ends of the filter cavity, characterized in that the filter cavity is a graded filter cavity, and a dust removal cavity, a water absorption cavity (5) and an acid-alkali impurity removal cavity (4) are sequentially arranged from the inlet to the outlet; the dust removal cavity (6) is internally provided with an annular support part (62), and a dust removal filter screen (61) is fixed to the inner side of the support part; the water absorption cavity (5) is internally arranged with a plurality of water absorption columns (52), a plurality of holes are formed in the water absorption columns, water absorption particles (53) are filled in the holes, and a screen (51) is fixed to the end face of the water absorption column; and the acid-alkali impurity removal cavity (4) comprises an acid removal cavity (42) and an alkali removal cavity (41) internally, the side wall of the acid removal cavity is provided with acid absorption paper, and the side wall of the alkali removal cavity is provided with alkali absorption paper.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical seal, in particular to a filter device suitable for purifying dry gas seal gas. BACKGROUND

[0002] Dry gas seal is a new type of shaft end seal which uses slotted sealing technology for gas sealing. It is a new type of non-contact sealing method that has appeared in recent years. Compared with traditional contact sealing, dry gas seal has the characteristics of long service life, stable and reliable operation, and small sealing power consumption. It can realize low energy consumption operation under small friction and low leakage of end face, and is widely used in shaft end sealing of rotary machines such as compressors and turbines.

[0003] However, in the actual process, the sealing gas may contain various impurities, which will affect the sealing effect of the dry gas seal, such as: (1) particles in the gas may enter the dry gas seal end face, causing end face wear, increasing friction, and in severe cases, causing deformation and failure of the sealing element; (2) water in the gas may cause corrosion of the sealing end face, affecting the sealing effect, and the water may block the small hole passage in the pneumatic system when it freezes at low temperature; (3) acid and alkali substances in the gas may corrode the sealing material, reduce the sealing performance, and in severe cases, may cause sealing failure. Therefore, during the operation of the dry gas seal, the content of particles, water and acid and alkali substances in the air needs to be strictly controlled to ensure the stability and reliability of the seal. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a filter device suitable for purifying dry gas seal gas, which solves the problem of various impurities in the existing sealing gas, causing the dry gas seal to fail to obtain excellent sealing performance, and realizes the purification of dry gas seal gas, ensuring the safety, stability and reliability of the dry gas seal operation. The specific scheme is as follows.

[0005] A filter device for purifying dry gas seal gas, comprising a filter cavity, two ends of the filter cavity are respectively fixed with an inlet side compression end cover and an outlet side compression end cover, characterized in that the filter cavity is a staged filter cavity, and a dust removal cavity, a water absorption cavity and an acid and alkali impurity removal cavity are sequentially arranged from the inlet to the outlet.

[0006] A gasket is arranged at the joint surface between the inlet side compression end cover, the dust removal cavity, the water absorption cavity, the acid and alkali impurity removal cavity and the outlet side compression end cover.

[0007] A plurality of groups of screw holes corresponding to each other are arranged around the inlet side compression end cover, the dust removal cavity, the water absorption cavity, the acid and alkali impurity removal cavity and the outlet side compression end cover, and are fixed by bolts.

[0008] The dust removal cavity, the water absorption cavity and the acid-alkali impurity removal cavity are contacted by a gasket; the acid-alkali impurity removal cavity, the water absorption cavity and the outlet side pressing end cover are connected by long bolts, and the acid-alkali impurity removal cavity and the outlet side pressing end cover are gap fitted; the dust removal cavity and the inlet side pressing end cover are connected by short bolts.

[0009] The inner wall of the dust removal cavity is provided with an annular support part, the inside of the support part is fixed with a dust removal filter screen, a passage is formed in the lower part of the dust removal cavity, and a dust collection box is arranged below the passage, and the bottom or side of the dust collection box is provided with a pull-out plate.

[0010] The support part and the dust removal cavity are installed in the following manner: a T-shaped protrusion is arranged on the outer wall of the support part, a T-shaped anti-falling groove matched with the T-shaped protrusion is arranged on the inner wall of the dust removal cavity, and the support part is installed on the inner wall of the dust removal cavity by embedding the T-shaped protrusion into the T-shaped anti-falling groove.

[0011] The dust removal filter screen and the support part are fixed in the following manner: the inside of the support part is provided with an annular step, the outside of the dust removal filter screen is provided with an outer edge matched with the annular step, and the outer edge is fixed on the annular step by a screw.

[0012] The interface between the annular step and the outer edge is filled with a filler, and the filler is a sealing material.

[0013] The water absorption cavity is internally arranged with a plurality of water absorption columns, a plurality of holes are formed in the water absorption columns, the holes are filled with water absorption particles, and the end surface of the water absorption column is fixed with a separation net.

[0014] The water absorption column is in the shape of a cube.

[0015] The water absorption columns are fixedly arranged on a disc-shaped water absorption disc, the inner wall of the water absorption cavity is provided with an annular step concave, and the water absorption disc is embedded in the inner wall of the water absorption cavity through the step.

[0016] The acid-alkali impurity removal cavity comprises an acid removal cavity and an alkali removal cavity, the side wall of the acid removal cavity is provided with an acid absorption paper, and the side wall of the alkali removal cavity is provided with an alkali absorption paper.

[0017] The acid-alkali impurity removal cavity is provided with a test cavity on the outer wall, the test cavity is communicated with the inside of the acid-alkali impurity removal cavity through a medium flow channel, the test cavity is provided with acid-alkali test paper, and a transparent observation window is formed in the test cavity.

[0018] A square rubber gasket is arranged around the observation window and is fixed by a screw. The observation window is made of tempered glass.

[0019] The working principle of the technical solution is as follows:

[0020] 1、First, the sealing gas enters the dust removal cavity from the through hole on the inlet side pressing end cover, and the dust removal cavity, dust removal net, support part, dust collection box and other structures form a dust removal system, the dust removal net effectively blocks and removes dust particles and collects and cleanses them through the dust collection box;

[0021] 2、Then, the sealing gas enters the water absorption cavity, and the water absorption cavity, separation net, water absorption column, spherical water absorption particles and other structures form a water removal system, the sealing gas is adsorbed to remove water when passing through the water absorption system, realizing the effect of removing water in the sealing gas;

[0022] 3、Next, the sealing gas enters the acid-alkali impurity removal cavity, and the acid-alkali impurity removal cavity, acid absorption paper, alkali absorption paper, acid-alkali test paper and test cavity form an acid-alkali removal system, the acid absorption paper and alkali absorption paper correspond to the acid absorption cavity and alkali absorption cavity, which are different sub-cavities of the same working cavity, and realize the effect of removing acid-alkali impurities in the sealing gas when the gas moves;

[0023] 4、Finally, the gas flows to the outlet side pressing end cover, completing the purification of the sealing gas.

[0024] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0025] 1、The filter device can purify dry gas sealing gas and remove dust, water and acid-alkali impurities in the gas, ensuring the purity of dry gas sealing gas and realizing reliable operation;

[0026] 2、The filter device can realize the installation and removal of the end cover, acid-alkali impurity removal cavity, water absorption cavity and dust removal cavity through long and short connecting bolts, and is convenient for replacing the water absorption material and dustproof material, each component is a detachable component, convenient for installation and replacement, and has the characteristics of simple structure and convenient process operation;

[0027] 3、The filter device adopts electrostatic attraction technology for the dust removal system, which can gather the dust of the sealing gas and then uniformly process it, and has the characteristics of simple processing and high efficiency;

[0028] 4、The filter device fills the spherical water absorption particles in the water absorption column in the water absorption system, which is cheap and easy to obtain. The sealing gas is adsorbed by multiple water absorption particles in turn, the water removal effect is obvious, and since the water absorption particles are naturally filled, there is no compaction phenomenon, so it will not affect the normal flow of the sealing gas;

[0029] 5, the filter device, whether the acid and alkali impurities are removed can be detected by acid and alkali test paper, check in the test paper observation window, simple and convenient to the system is removed and normal work make a judgment. The material of observation window is tempered glass, prevent the impact of sealing gas pressure on the observation window cause fragmentation, ensure the safety of the working process, and take square rubber gasket reduce the secondary leakage of sealing gas. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the explosion diagram of the embodiment of the present application;

[0031] Figure 2 is the half cut axial view of the embodiment of the present application;

[0032] Figure 3 is the structural schematic view of the embodiment of the present application;

[0033] Figure 4 is the structural schematic view of the pressing end cover in the embodiment of the present application;

[0034] Figure 5 is the structural schematic view of the dust removal cavity in the embodiment of the present application;

[0035] Figure 6 is the cut view of the support part and dust removal filter screen in the embodiment of the present application;

[0036] Figure 7 is the cut view of the water absorption system in the embodiment of the present application;

[0037] Figure 8 is the structural schematic view of the acid and alkali impurity removal cavity in the embodiment of the present application;

[0038] Figure 9 is the structural schematic view of the gasket in the embodiment of the present application;

[0039] Figure 10 is the structural schematic view of the bolt in the embodiment of the present application.

[0040] Explanation of reference signs: 11 long bolt, 12 short bolt; 21 outlet side pressing end cover, 22 inlet side pressing end cover, 23 second bolt hole; 3 observation window; 4 acid and alkali impurity removal cavity, 41 alkali removal cavity, 42 acid removal cavity, 43 test cavity, 44 medium flow channel; 5 water absorption cavity, 51 separation screen, 52 water absorption column, 53 water absorption particle; 6 dust removal cavity, 61 dust removal filter screen, 62 support part, 63 dust collection box, 64 suction plate, 65 filler, 66 T-shaped protrusion, 67 anti-dropping groove, 68 first bolt hole; 7 gasket. DETAILED DESCRIPTION

[0041] Example 1, see attached Figures 1-10The utility model provides a filter device for purifying dry gas sealing gas, which comprises a filter cavity, and an inlet side compression end cover 22 and an outlet side compression end cover 21 are fixedly connected to two ends of the filter cavity respectively, characterized in that the filter cavity is a staged filter cavity, and a dust removal cavity, a water absorption cavity 5 and an acid-alkali impurity removal cavity 4 are sequentially arranged from the inlet to the outlet.

[0042] A plurality of groups of screw holes corresponding to each other are arranged around the inlet side compression end cover, the dust removal cavity, the water absorption cavity, the acid-alkali impurity removal cavity and the outlet side compression end cover, and the screw holes are fixed by being penetrated and fixed by bolts.

[0043] The dust removal cavity 6 is provided with an annular support portion 62 mounted on the inner wall thereof, and a dust removal filter screen 61 is fixedly connected to the inner side of the support portion; a passage is formed in the lower portion of the dust removal cavity, and a dust collection box 63 is arranged below the passage; and a pull-out plate 64 is arranged on the bottom or the side of the dust collection box.

[0044] The water absorption cavity 5 is provided with a plurality of water absorption columns 52 arranged in the cavity; a plurality of holes are formed in the water absorption columns, and water absorption particles 53 are filled in the holes; and a separation screen 51 is fixedly connected to the end face of the water absorption column. The water absorption column itself has a water absorption effect, and the water absorption effect can be increased by forming holes in the water absorption column and filling water absorption particles in the holes. The separation screen can stabilize the water absorption column and the water absorption particles.

[0045] The acid-alkali impurity removal cavity 4 comprises an acid removal cavity 42 and an alkali removal cavity 41; acid absorption paper is arranged on the side wall of the acid removal cavity; and alkali absorption paper is arranged on the side wall of the alkali removal cavity. The acid absorption paper and the alkali absorption paper can absorb acid-alkali impurities in the movement of the gas, so as to purify the acid-alkali property of the gas.

[0046] The acid-alkali impurity removal cavity is provided with a test cavity 43 arranged on the outer wall thereof; the test cavity is in communication with the interior of the acid-alkali impurity removal cavity through a medium flow channel 44; acid-alkali test paper is arranged in the test cavity; and a transparent observation window 3 is formed in the test cavity. In the movement of the gas, a small amount of sealing medium enters the acid-alkali test paper in the test cavity through the flow channel, and a technician can check through the observation window, so as to judge whether the acid-alkali impurities are removed and whether the system is normally working.

[0047] In example 2, a filter device for purifying dry gas sealing gas is provided, which is based on example 1.

[0048] The dust removal cavity, the water absorption cavity and the acid-alkali impurity removal cavity are in contact through a gasket 7; the acid-alkali impurity removal cavity, the water absorption cavity and the outlet side compression end cover are provided with second bolt holes 23 around the periphery thereof, and are connected through long bolts 11, and the acid-alkali impurity removal cavity and the outlet side compression end cover are in clearance fit; the water absorption cavity, the dust removal cavity and the inlet side compression end cover are provided with first bolt holes 68 around the periphery thereof, and are connected through short bolts 12. The first bolt holes and the second bolt holes correspond to each other, and the first bolt holes on the water absorption cavity also serve as the second bolt holes.

[0049] The import side pressing end cover and the export side pressing end cover adopt a stepped interface, which is convenient for connecting with other pipeline systems.

[0050] Example 3, a filter device suitable for purifying dry gas sealing gas, based on example 1:

[0051] The support part and the installation mode of the dust removal cavity are that a T-shaped protrusion 66 is arranged on the outer wall of the support part, and a T-shaped anti-falling groove 67 matched with the T-shaped protrusion 66 is arranged on the inner wall of the dust removal cavity. The support part is installed on the inner wall of the dust removal cavity by embedding the T-shaped protrusion into the T-shaped anti-falling groove, so that the axial fixation of the support part is realized, and the support part is easy to install and disassemble in the radial direction.

[0052] The T-shaped protrusion and the anti-falling groove have a gap in the radial direction, and the gap is microns.

[0053] The fixing mode of the dust removal filter screen and the support part is that the inner side of the support part is provided with an annular step, and the outer side of the dust removal filter screen is provided with an outer edge matched with the annular step, and the outer edge is fixed on the annular step by a screw.

[0054] The dust removal filter screen is a dust removal wire mesh and is provided with static electricity. The dust particles are filtered to the maximum extent in the sealing gas by using the attraction of static electricity to dust particles. Within a predetermined time, the static electricity in the dust removal wire mesh is removed by power-off, and the accumulated dust particles fall into the dust collection box under the action of gravity and are discharged to the outside through the suction plate.

[0055] The annular step is provided with an annular groove, and the annular groove is filled with a filler 65, and the filler is a sealing material.

[0056] Example 4, a filter device suitable for purifying dry gas sealing gas, based on example 1:

[0057] The water absorption column is in the shape of a cube. The cube shape can realize circumferential fixation and avoid rotation during water removal, which affects the water removal efficiency. The water absorption column is made of stainless steel material.

[0058] The water absorption column is fixed and arranged on a disc-shaped water absorption disc, and the inner wall of the water absorption cavity is provided with an annular step concave inward. The water absorption disc is embedded in the inner wall of the water absorption cavity through the step.

[0059] The water absorption particles are spherical water absorption particles, and the material of the water absorption particles is water absorption resin material.

[0060] The square rubber gaskets are arranged around the observation window and are fixed by screws. The observation window is made of tempered glass. The square rubber gaskets can prevent secondary leakage of the sealing gas. The tempered glass can prevent the observation window from being broken due to the impact of the sealing gas pressure, and a safety accident can be avoided.

[0061] The above detailed description of the specific embodiments of the present application further illustrates the objects, technical solutions and advantages of the present application. It should be understood that the above detailed description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A filter device for purifying dry gas seal gas, comprising a filter cavity, two ends of the filter cavity are respectively fixedly connected with an inlet side compression end cover (22) and an outlet side compression end cover (21), characterized in that, The filtering cavity is a hierarchical filtering cavity, which is sequentially provided with a dust removal cavity, a water absorption cavity (5) and an acid and alkali impurity removal cavity (4) from an inlet to an outlet; the inlet side pressing end cover, the dust removal cavity, the water absorption cavity, the acid and alkali impurity removal cavity and the outlet side pressing end cover are provided with a plurality of groups of screw holes corresponding to each other around, and are fixed through bolts; the dust removal cavity (6) is internally provided with an annular support part (62), the inner side of the support part is fixedly provided with a dust removal filter screen (61), a passage is formed in the lower part of the dust removal cavity, and a dust collection box (63) is arranged below the passage, and a pull-out plate (64) is arranged on the bottom or the side of the dust collection box; the water absorption cavity (5) is internally arranged with a plurality of water absorption columns (52), a plurality of holes are formed in the water absorption columns, the holes are filled with water absorption particles (53), and the end surface of the water absorption column is fixedly provided with a separation screen (51); The acid and alkali impurity removal cavity (4) comprises an acid removal cavity (42) and an alkali removal cavity (41) internally, the side wall of the acid removal cavity is provided with acid absorption paper, and the side wall of the alkali removal cavity is provided with alkali absorption paper; the acid and alkali impurity removal cavity is provided with a test cavity (43) on the outer wall, the test cavity is communicated with the interior of the acid and alkali impurity removal cavity through a medium flow channel (44), acid and alkali test paper is arranged in the test cavity, and a transparent observation window (3) is formed in the test cavity; The dust removal cavity, the water absorption cavity and the acid and alkali impurity removal cavity are in contact through a gasket (7); the acid and alkali impurity removal cavity, the water absorption cavity and the outlet side pressing end cover are provided with second bolt holes (23) around, are connected through long bolts (11), and are gap-fitted between the acid and alkali impurity removal cavity and the outlet side pressing end cover; the water absorption cavity, the dust removal cavity and the inlet side pressing end cover are provided with first bolt holes (68) around, and are connected through short bolts (12); The dust removal filter screen is a dust removal wire screen, and is provided with static electricity; The water absorption column is in the shape of a cube; The water absorption column is fixedly arranged on a disc-shaped water absorption disc, the inner wall of the water absorption cavity is provided with an annular concave step, and the water absorption disc is embedded in the inner wall of the water absorption cavity through the step.

2. The filter device for purifying dry gas seal gas according to claim 1, wherein The inlet side pressing end cover and the outlet side pressing end cover adopt a stepped interface, and the size of the inlet side interface is larger than that of the outlet side interface.

3. The filter apparatus for purifying dry gas seal gas of claim 1, wherein, The mounting mode of the support part and the dust removal cavity is that a T-shaped protrusion (66) is arranged on the outer wall of the support part, and a T-shaped anti-falling groove (67) matched with the T-shaped protrusion is arranged on the inner wall of the dust removal cavity.

4. The filter apparatus for purifying dry gas seal gas of claim 3, wherein, The T-shaped protrusion and the anti-falling groove have a gap in the radial direction, and the gap is in microns.

5. The filter apparatus for purifying dry gas seal gas of claim 1, wherein, The fixing mode of the dust removal filter screen and the support part is that the inner side of the support part is provided with an annular step, the outer side of the dust removal filter screen is provided with an outer edge matched with the annular step, and the outer edge is fixed on the annular step through a screw; the annular step and the outer edge are filled with a filler at the interface.

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