CN203253285U

CN203253285U - Gas filter

Info

Publication number: CN203253285U
Application number: CN 201320206447
Authority: CN
Inventors: 金伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-23
Filing date: 2013-04-23
Publication date: 2013-10-30
Anticipated expiration: 2023-04-23

Abstract

The utility model discloses a gas filter. According to the gas filter, hollow fibers serve as a filtering medium and are filled in a manner that the density or porosity becomes dense from loose from top to bottom. The gas filter disclosed by the utility model has the advantages that the filtering medium is of density gradient arrangement, so that the resistance increase rate of a filtering layer can be lowered greatly; and compared with the ordinary filter, the resistance forming time is improved by thousands of times, so that the gas filter has a very broad application prospect.

Description

A kind of pneumatic filter

Technical field

The utility model relates to gas filtration equipment, specifically, is about a kind of pneumatic filter for gases such as low pressure natural gas or coal bed gas.

Background technology

Along with the application of the multiple development tool in oil field, natural gas _ raw material gas makings before preliminary working contains a large amount of profits and fine dust impurity worse and worse.The existence of these impurity can cause the obstruction of accurate voltage regulating equipment and measuring equipment, even damages, and impact is produced and caused damage.While, its existence aggravated the problem of existence in the moisture foreign gas production because solid phase particles is water freezing and the natural nucleus that forms gas hydrates under the cryogenic conditions.

In order to eliminate the significant damage that water and dust bring in the gas, usually utilize in process of production that gravity settling separation, centrifugation and filtration and separation techniques are dewatered, dust removal process.

Filtration and separation techniques is mainly used in the very little dust of particle diameter, and the kind of isolated by filtration is a lot, and filtering accuracy can be done very highly, but the pressure loss is relatively large, and the operating condition of filter medium is had relatively high expectations.Because the essence of existing filter plant all is surface filtration, resistance rises very fast, and often replacement frequency is too high in the actual use procedure, brings a lot of inconvenience.Therefore be necessary to be improved.

The utility model content

The purpose of this utility model just is to provide a kind of pneumatic filter, can effectively remove a large amount of impurity in the gases such as natural gas or coal bed gas.

For achieving the above object, pneumatic filter of the present utility model adopts doughnut as filter medium, and fills to densification from loose by density or voidage from top to bottom.

According to the utility model, described pneumatic filter comprises several filter boxs, and the filter medium in each filter box is all filled to densification from loose by density or voidage from top to bottom.

Optional another kind of scheme, described pneumatic filter comprises several filter boxs, the density of filter medium or porosity are identical in each casing, but the density of filter medium or voidage arrange in gradient between each casing.

According to preferred embodiment of the present utility model, described filter medium is 7～13 hole doughnuts.

Pneumatic filter of the present utility model because its filter medium adopts the density gradient setting, can reduce the rate of climb of filter course resistance greatly, and than plain filter, the resistance formation time has promoted thousands of times, has very widely application prospect.

Description of drawings

Fig. 1 is the structural representation of pneumatic filter of the present utility model.

Fig. 2 is the structural representation of another embodiment of pneumatic filter of the present utility model.

The figure number explanation:

10: filter medium; 20/30: filter box;

20 '/30 '/40 ': filter box.

The specific embodiment

Below in conjunction with accompanying drawing, with specific embodiment gas of the present utility model is described in further detail.Should be understood that following examples are only for explanation the utility model but not for limiting scope of the present utility model.

As shown in Figure 1, pneumatic filter of the present utility model adopts doughnut as filter medium 10, and fills to densification from loose by density or voidage from top to bottom.

Described pneumatic filter comprises two

filter boxs

20,30, and the filter medium 10 in each

filter box

20,30 is all filled to densification from loose by density or voidage from top to bottom.

Fig. 2 has shown another embodiment of the present utility model, described pneumatic filter comprises three filter boxs 20 ', 30 ', 40 ', density or the porosity of filter medium 10 are identical in each casing 20 ', 30 ' or 40 ', but the density of filter medium 10 or voidage in gradient setting from top to bottom between each casing 20 ', 30 ', 40 '.

Pneumatic filter of the present utility model, filter medium 10 are preferably 7～13 hole doughnuts.

In the practical application, pneumatic filter can be arranged to different filtering accuracy grades as required, to guarantee to filter the cleanliness factor of rear gas.

Because the elasticity of doughnut is large, better tolerance, to the excellent adsorption of dust in the gas, adds its top-down density gradient setting, dust can be by automatic classification, the dust that particle diameter is larger can at first be trapped, and then is trapped from big to small by particle diameter successively, thereby realizes three-dimensional the filtration; Because dust always can be walked toward the less place of resistance, therefore, along with the carrying out of filtering, can form in the plane gradually a kind of balance, and then spatially form a kind of balance, therefore the filter of this structure has the advantages such as high efficiency, lower resistance, stable and reliable operation, high pollutant holding capability, what is more important, compare the filter of general surface filtered version, the time that its resistance forms prolongs greatly; The actual result who detects, the time that resistance forms has been improved thousands of times, can be described as beyond imagination; The most obvious benefit of bringing thus is, the filter that all will change previous every day, can extend to again replacing more than 1 year after adopting filter of the present utility model, can reach at most more than 4 years and change again, not only greatly reduce cost, and can realize that advantage is apparent synchronously with the conventional time between overhauls(TBO) of equipment.And, because filtering material is to adopt by density gradient layering setting, when filtration resistance rises to when to a certain degree needing to change, need not whole filter is removed, get final product and only filter course wherein need be taken out change, usually only needed to finish in 2-3 hour, time saving and energy saving.

Claims

1. a pneumatic filter is characterized in that, described pneumatic filter, and is filled to densification from loose by density or voidage as filter medium from top to bottom with doughnut.

2. pneumatic filter as claimed in claim 1 is characterized in that, described pneumatic filter comprises several filter boxs, and the filter medium in each filter box is all filled to densification from loose by density or voidage from top to bottom.

3. pneumatic filter as claimed in claim 1 is characterized in that, described pneumatic filter comprises several filter boxs, and the density of filter medium or porosity are identical in each casing, but the density of filter medium or voidage arrange in gradient between each casing.

4. pneumatic filter as claimed in claim 1 is characterized in that, described filter medium is 7～13 hole doughnuts.