CN205360887U - Air filter - Google Patents

Abstract

The utility model relates to a filtration field especially relates to the wet filtration of integration accuse control by temperature change. The utility model aims to solve the technical problem that a multi -functional air filter of integration is provided. For realizing the purposes, the utility model provides an air filter, including shell and filtering component, filtering component installs in shell cavity and divide into gas purifying cavity and crude gas chamber with it, be equipped with on the shell with the inlet structure of crude gas chamber intercommunication, wherein inlet structure lies in in the last and/or crude gas chamber set up in regional between inlet structure and the filtering component and remain filtered air's temperature regulation apparatus.

Description

Air filter

Technical field

This utility model relates to field of air filtration, particularly relates to integration temperature and humidity control air filtration.

Background technology

At present, in air-treatment technology, generally requiring the many-sided parameter to air property and be controlled, the pressure of its air needs often as a basic parameter it is further processed the demand that reaches life or produce.

And in air compress technique, the dust contained in air easily weares and teares the parts such as cylinder, airway, also easily mixing with the lubricating oil in compressor and cause the problems such as the decline of lubricating oil purity, lubricating oil heating to make lubricant effect be deteriorated, dust is also possible to deposit and results in blockage within the compressor in addition.So in current air-treatment technology, before air is passed into compressed air unit, generally requiring and be filtered air purifying, to reduce the dust impurities in air.

But in current air filter, a ubiquitous problem is exactly that the function in air filter is excessively single, only the filtration just for air has effect, and other nature parameters of air cannot be played change effect, inventor have found that, such as in above-mentioned air compress technique, even if after air filter reduces the impurity dust in air, energy consumption and the mechanical loss of air compressor still fall flat, during particularly in summer and rainy weather, the follow-up equipment loss situation being connected with air filter of the prior art becomes apparent from.

, the inventors have also found that, in the filter, when air humidity is excessive, filter is easily corroded meanwhile, meanwhile, when humidity is excessive, can there is the aqueous water of precipitation floating in atmosphere or be attached to around dust in air with the form of the tiny globule in air.So, when air is by filtering material, surface of filter medium is remaining liquid water very easily, and these aqueous waters are easy on filter opening to form fluid film, and then affect the filtration flux of filter material, the filtration pressure difference causing filter material increases, and even these remain in the aqueous water on filter material and can also be combined with the dust depending on filter material, cause dust to block filter opening in surface of filter medium fouling.Bringing additional energy so both to the filtration work of filter, filtration pressure difference increases the stability and the service life that also have influence on filter, and also reduces the work efficiency filtering blowback.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of integrated multi-functional air filter.

For achieving the above object, air filter provided by the utility model, including shell and filter assemblies, described filter assemblies is installed on shell inner cavity and is classified as pure qi (oxygen) chamber and Primordial Qi chamber, shell is provided with the air intake structure connected with Primordial Qi chamber, wherein, the temperature-adjusting device of air to be filtered it is provided with on described air intake structure and/or in Primordial Qi chamber in region between described air intake structure and filter assemblies.

Inventor have found that, the performance parameter of air effectively can done many-side adjustment by being provided with temperature-adjusting device before filter assemblies by air, and in actual applications, by the impact of equipment service condition, the temperature and humidity of air usually can occur associated with each other dynamic between the two.Steam partial pressure and saturated volume water capacity in its air are just obviously reduced significantly depending on the decline of temperature, under normal atmosphere (0.1013MPa), in the saturated moist air of 50 DEG C, steam partial pressure is 0.0123MPa, and saturated volume water capacity is 83.2g m^-3, in the saturated moist air of 20 DEG C, steam partial pressure is 0.0023MPa, and saturated volume water capacity is 17.3g m^-3, in the saturated moist air of-10 DEG C, steam partial pressure is 0.00026MPa, and saturated volume water capacity is 2.2g m^-3.So, mutual association is inherently there is between temperature and the saturated humidity ratio of air, use in practical operation, it is possible to being reached by the control to temperature the humidity of air is regulated and controled simultaneously, thus realizing air filter, air many-side performance being adjusted.

In view of this, it is possible to air filter will be provided with temperature-adjusting device and filter assemblies organically combines.First, the air of filter output not only can reach desirable parameter request in dustiness, and also the air of filter output can be carried out the control of temperature and humidity simultaneously, to guarantee that the air after filter is in output to follow-up equipment, there is more desirably combination property；Second, on air intake structure and/or Primordial Qi chamber is provided with in region between described air intake structure and filter assemblies the temperature-adjusting device of air to be filtered in the filter.This temperature-adjusting device so can also be utilized to reduce the temperature of the air passing into filter, thus being lowered into the saturated volume water capacity of the air of filter, thus can will go into the volume water capacity of the air of filter to control, in certain scope, namely to achieve the humid control to the air entering into filter.

So, on the basis of above-mentioned 2, above-mentioned air filter temperature-adjusting device and filter assemblies have the advantage that after organically combining that the steam in first air forms liquid and water droplet even solid-state ice crystal after precipitation in a device, in the process of equipment operation, so very easily cause the physical abrasion to equipment, also largely strengthen the chemical attack to equipment；Meanwhile, humid air precipitates out and water also can cause for the lubricating system in equipment very big destruction；Certainly, also include humid air in the filter and can also cause the impact of filter material in filter assemblies.

It is to be noted, in above-mentioned air filter, in order to realize the compact conformation of air filter, in the filter, temperature-adjusting device can be arranged on the position of air intake structure, the air intake structure at temperature-adjusting device wherein said here, it is possible to be a kind of open air intake structure, the position that the finger of broad sense connects with the Primordial Qi chamber of filter；May also mean that temperature-adjusting device is positioned at a relatively specific air intake structure, for instance in the inwall of air inlet pipe.Certainly, this filter can be directly arranged in Primordial Qi chamber by this air filter.

Further, described shell constitutes tubular construction, and the sidewall of this tubular construction is provided with the air inlet as described air intake structure, and described temperature-adjusting device correspondence is installed on air intake structure place.It is so the one optimization structure of above-mentioned air filter, constitutes tubular construction by shell, and air intake structure is installed on the sidewall of this tubular construction, be achieved in that the integrated air air filter of a kind of compact conformation.

Meanwhile, described air intake structure is interrupted around all bodies of tubular construction or offers continuously, then described temperature regulates dress formation and filter assemblies is enclosed in tubular alternating temperature band therein.The shell of air filter continuously or discontinuously offers air intake structure around the tubular construction of shell, so, a relatively large air inlet of area can be provided with on shell week body, both having added air inflow, the thermostatic work efficiency being simultaneously pointed to air inlet has positive role.Described air intake structure continuously or discontinuously offers air intake structure around shell tubular construction can increase air intake structure area, according to Flow continuity equation in hydrokinematics, in constant flow, the flow in stream is equal, and the speed of fluid is then inversely proportional to the sectional area of flow area.So, in above-mentioned filter, air intake structure is provided with and is centered around on tubular construction and increases air intake structure area, it is possible to effectively reduce air instantaneous velocity when by air intake structure, thus make air carry out heat exchange more fully between air intake structure and temperature-adjusting device.

Herein it may also be noted that preferably, described temperature-adjusting device adopts surface cooler, and this surface cooler is around tubular construction week body and be in communication with the outside and passed into heat-conducting medium.Surface cooler is a kind of heat exchange structure being coiled by heat pipe or conducting strip and making, and is in communication with the outside by surface cooler and inside has passed into heat-conducting medium, is a kind of with low cost, temperature-adjusting device that operating power consumption is low.

Meanwhile, described air intake structure is centered around tubular construction on all bodies of lower end.Thus when air through air intake structure by after temperature-adjusting device effect, if air themperature declines, when volume water capacity in air reaches the saturated volume water capacity critical state at this temperature, air precipitates out steam precipitate out, thus, air intake structure is arranged on tubular construction can make the water of these precipitations better discharge near the position of lower end, and being also avoided that water is flowed downward by graviational interaction causes damage to filter assemblies simultaneously.

Further, described filter assemblies includes some chimney filters, and this chimney filter is installed on the orifice plate being connected with outer casing inner wall.This is the preferred structure of a kind of filter assemblies, is equiped with orifice plate in the enclosure in wall, is arranged on orifice plate by chimney filter, so can so that the installation of filter assemblies, maintenance and dismounting.And orifice plate here can be provided with some chimney filters, to increase the filter area of filter assemblies, be also avoided that filter assemblies needs whole replacing after there is breakage simultaneously.Chimney filter in filter assemblies is positioned at Primordial Qi chamber so that chimney filter is more nearly the temperature-adjusting device being arranged on air intake structure.

Preferably, described chimney filter all or most is surrounded by temperature-adjusting device.Thus relatively close location can be maintained between chimney filter and temperature-adjusting device, it is to avoid air, after the condition all reaching relative ideal after temperature-adjusting device in temperature and humidity, causes again air performance change because of the conveying of distance.

On the basis of said structure, in addition it is also necessary to explanation, the strainability of filter assemblies is limited mainly by two aspect impacts: one is exactly the structure of filter assemblies itself, and the reasonability of filter assemblies structure will directly influence strainability.So in the present invention, described chimney filter includes supporter and is attached on this supporter the filter material of windward side.Described windward side refers in filtering work, and the one side that air-flow direction to be filtered first touches on chimney filter is referred to as windward side, otherwise is lee face.By filtering the windward side being attached to supporter, thus realizing the supporter support to filter material, so can effectively strengthening the strength and stability of chimney filter in filter assemblies, the work to realize filter assemblies is more stable.

It two is that the performance (including precision, air penetrability, the strength of materials, toughness etc.) of filtering material in filter assemblies is preferred；Wherein, chimney filter includes by high density porous polyethylene supporter and is adhering closely to the filter material that the expanded PTFE filtration membrane of high density porous polyethylene supporting body surface is constituted；Described expanded PTFE filtration membrane to the clearance of the dust of particle diameter >=0.5 μm in gas to be filtered more than 99%.

The working effect of air filter is affected most important by the filter element performance in air filter, here the filter element performance mentioned both had included the filtering accuracy of filter element, also included the stability etc. of the ability of anti-deformation of filter material in filter element, toughness, intensity and opposing unstability.Inventor have found that, due at present in air filter, conventional filter cartridge type or cloth-bag type filter element generally have bigger filter area, and its filter material is respectively provided with bigger flexibility, simultaneously itself strength and stiffness of filter cylinder and cloth bag are relatively low, therefore, when filter element works under high-pressure environment or be in and filter and under the duty that frequently switches of blowback time, filtering material is easy to deform and presses down or be cause that endurance failure occurs in filtering material, thus makes filter element degradation problem under strainability occur.And more serious problem is such problem is often day by day serious in the continuous firing of air filter, the damage initial stage at filter element, it there is no significant change in appearance, this strainability also having resulted in filter element reduces and not easily discovers, and the integral working causing air filter reduces.

In view of this, inventor adopts expanded PTFE filtration membrane can solve above-mentioned Problems existing well as filtering material.It is pointed out that described expanded PTFE filtration membrane, being that one passes through stretcher strain (i.e. the implication of " varicosity ") thus forming the film of threadiness blind hole on polytetrafluoroethylmaterial material.This film itself also has extremely strong hydrophobicity and the feature of not viscous ash, therefore, is all not likely to produce condensation in a variety of weather conditions and sticks with paste film phenomenon, and can be realized the purifying regeneration of film by back-blowing dust removing device easily.Expanded PTFE filtration membrane has very high filtering accuracy (to the clearance of the dust of particle diameter >=0.5 μm in air to be filtered more than 99%), and preferably, filter material is supported by the supporter being provided with porous in filter element, so that it is guaranteed that filter material has higher intensity and not cracky.Wherein the support of filter material is adopt the mode of close attachment and supporter to be attached above-mentioned expanded PTFE filtration membrane by the supporter of porous.Further, above-mentioned with the support body material of expanded PTFE close attachment preferred high density porous polyethylene, it is possible to cover method by heat of the prior art and realize close attachment between the two.

It may further be preferable that described temperature-adjusting device is the temperature of air to be filtered is increased to 0 DEG C～10 DEG C or is reduced to the temperature-adjusting device of 10 DEG C～28 DEG C.Wherein when air themperature to be filtered is below 0 DEG C, air is increased to 0 DEG C～10 DEG C by temperature-adjusting device, is wherein preferably and is increased to 5 DEG C～10 DEG C；When air themperature to be filtered is more than 28 DEG C, air is reduced to 10 DEG C～28 DEG C by temperature-adjusting device, is wherein preferably and is reduced to 20 DEG C～25 DEG C；When air themperature to be filtered is 0 DEG C～28 DEG C, temperature-adjusting device does not adjust air themperature；Or when in air to be filtered, volume water capacity is 27.2g m^-3Time above, air is reduced to less than 28 DEG C by temperature-adjusting device.It should be noted that owing to the humidity of air can be indicated by multiple expression way, so the volume water capacity of measurement described herein is 27.2g m^-3Other expression waies that can be through measuring air humidity carry out converting.

Wherein the temperature passing into the air of air filter is controlled in the scope of 0 DEG C～10 DEG C (temperature-adjusting device is temperature lift mode) or 10 DEG C～28 DEG C (temperature-adjusting device is that temperature reduces pattern) by temperature-adjusting device, is wherein air filter is caused damage in order to prevent too low air temperature from precipitating out ice crystal in air filter by air temperature control at 0 DEG C～10 DEG C；It is that saturated volume water capacity in order to guarantee in air after reducing air themperature is relatively low by air temperature control at 10 DEG C～28 DEG C, it is ensured that the humidity in air is in a relatively low value range.And when air themperature to be filtered is 0 DEG C～28 DEG C, temperature-adjusting device does not adjust air themperature, so it is because the temperature and humidity of air now a relatively suitable scope, it is possible to do not regulated by temperature-adjusting device and reduce the energy consumption of air filter.It is two concomitant regimen detecting and then controlling temperature-adjusting device work with air themperature that the above-mentioned volume water capacity to air detects.

Summary structure is it can be seen that the air filter of present invention China is the air filter of a kind of multifunctional all, and compact conformation can have good air filtration effect.

Below in conjunction with specification drawings and specific embodiments, above-mentioned air filter is further described.

Accompanying drawing explanation

Fig. 1 is air filter arrangement schematic diagram.

Fig. 2 is the filter assemblies structural representation in air filter.

Fig. 3 is air filter schematic top plan view.

Fig. 4 is Fig. 1 surface cooler close-up schematic view.

Fig. 5 is filter element enlarged diagram in Fig. 3.

Wherein, in Figure of description, the relation that the relation of each label and structure is corresponding in turn to is: 1 is shell, and 11 is Primordial Qi chamber, 12 is pure qi (oxygen) chamber, 13 is air intake structure, and 2 is filter assemblies, and 21 is orifice plate, 22 is chimney filter, 221 is expanded PTFE filtration membrane, and 222 is high density porous polyethylene supporter, and 31 is surface cooler.

Detailed description of the invention

As it is shown in figure 1, air filter in the present embodiment all includes shell 1, filter assemblies 2 and temperature-adjusting device.

Wherein, shell 1 has the rectangular tubular construction of cavity in being, including four vertical facades on this tubular construction, the close lower end position that these four facades are located close to rectangular tubular construction is provided with air intake structure 13, and this air intake structure 13 connects with the cavity in shell 1.

It is positioned at above-mentioned shell 1 and filter assemblies 2 is installed, this filter assemblies 2 includes orifice plate 21 and chimney filter 22, and its aperture plate 21 offers some passages, and on chimney filter 22, one end is closed, one end is provided with the port matched with orifice plate 21 passage, and chimney filter 22 is arranged on orifice plate 21.In shell 1, the inner chamber of shell 1 is divided into pure qi (oxygen) chamber 12 and Primordial Qi chamber 11 by filter assemblies 2, and wherein Primordial Qi chamber 11 connects with air intake structure 13.

The air intake structure 13 be positioned at shell 1 is provided with and coils, by heat pipe or conducting strip, the surface cooler 31 made, what this surface cooler 31 adopted is made up of some heat pipe coilings, and this heat pipe is in communication with the outside, heat pipe internal recycle is connected with the water at atmospheric pressure of 12 DEG C～18 DEG C as heat-conducting medium, and surface cooler 31 herein is exactly above-mentioned thermostatic a kind of concrete form.

In the present embodiment, it is positioned at air intake structure 13 place of shell 1, air intake structure 13 is substantially all covered by the surface cooler 31 that heat pipe coiling is made, it is only between heat pipe and heat pipe, leave pipeline enclosure gap pass into the opening of filter as air, it is with air approach axis on air intake structure 13 simultaneously, the air passing into air intake structure 13 it is provided with several surface coolers parallel to each other 31, so that it is guaranteed that can carry out heat exchange with having between surface cooler 31 to contact enough fully.

As shown in Figure 4, what surface cooler 31 in the present embodiment adopted be through, and heat pipe coils repeatedly makes, certainly, in order to realize the better heat exchange of surface cooler 31, can adopt and between heat pipe, offer aperture or on the tube wall of heat pipe, add laciniation, some surface coolers 31 parallel to each other can also be installed on heat pipe, these structures can further strengthen the heat exchange efficacy of surface cooler 31, this is also that those skilled in the art can find above-mentioned similar mode from prior art, does not just repeat at this.

Thus, in conjunction with Fig. 3 it can be seen that in the present embodiment, the surrounding of filter assemblies 2 is both provided with heat pipe and coils the surface cooler 31 made, by surface cooler 31 by filter assemblies 2 in being centered around in the way of similar tubular.And this surface cooler 31 is arranged on air intake structure 13, all air being entered into filter assemblies 2 by air intake structure 13, all will necessarily be passed through this surface cooler 31 and form with it heat exchange.

Simultaneously, can be seen that in conjunction with Fig. 2, in the present embodiment, the shell 1 of air filter is a hollow tubular construction having certain altitude, the gas outlet of air filter wherein it is provided with in the upper end being positioned at this hollow tubular construction, it is positioned at the gas outlet lower end position of this hollow tubular construction, orifice plate 21 is installed, this orifice plate 21 is provided with some chimney filters 22 by securing member, these chimney filters 22 extend certain length vertically downward, and at least part of same level extending to surface cooler 31 in chimney filter 22, result in formation of chimney filter 22, with surface cooler 31, there is distance closely to a certain extent.

As it is shown in figure 5, in the present embodiment, chimney filter 22 includes supporter and is attached to the filter material of supporter windward side.Here the windward side said, it is simply that refer to that chimney filter 22 is arranged in the face that first Primordial Qi chamber 11 carries out contacting with air.And, in the present embodiment, having better filtering accuracy to realize chimney filter 22 and have better structural strength, what above-mentioned chimney filter 22 adopted is by high density porous polyethylene supporter 222 and is adhering closely to the filter material that the expanded PTFE filtration membrane 221 on high density porous polyethylene supporter 222 surface is constituted；Described eptfe film 221 be a kind of by stretcher strain thus on polytetrafluoroethylmaterial material formed threadiness blind hole film, this film itself has extremely strong hydrophobicity and the characteristic of non-sticky ash.Wherein, eptfe film 221 itself has significantly high filtering accuracy, to the clearance of the dust of particle diameter >=0.5 μm in air to be filtered more than 99%, even can reach in the present embodiment the clearance of the dust of particle diameter >=0.1 μm in air to be filtered more than 99%.

So when air is passed in the air filter in the present embodiment, the surface cooler 31 being arranged on air intake structure 13 can be first passed through and carry out temperature control, in the present embodiment, preferred scheme is, it is to the air passing into air filter is increased to 0 DEG C～10 DEG C or being reduced to 10 DEG C～28 DEG C, is wherein air filter is caused damage in order to prevent too low air temperature from precipitating out ice crystal in air filter by air temperature control at 0 DEG C～10 DEG C；It is that saturated volume water capacity in order to guarantee in air after reducing air themperature is relatively low by air temperature control at 10 DEG C～28 DEG C, it is ensured that the humidity in air is in a relatively low value range.And when air themperature to be filtered is 0 DEG C～28 DEG C, temperature-adjusting device does not adjust air themperature, so it is because the temperature and humidity of air now a relatively suitable scope, it is possible to do not regulated by temperature-adjusting device and reduce the energy consumption of air filter.When in air to be filtered, volume water capacity is 27.2g m^-3Time above, air is reduced to less than 28 DEG C by temperature-adjusting device, measures air humidity and enters and be controlled air themperature being a concomitant regimen of a kind of and above-mentioned measurement air themperature.

Again through the above-mentioned chimney filter 22 including the filter material that expanded PTFE filtration membrane 221 is constituted, air being carried out dust removal and filtration afterwards, the air so obtained is a kind of proper temperature, atmospheric density will not be too low, and has the air of sufficiently high degree of purity.This is first function of the air filter in the present embodiment.

And the air filter in the present embodiment include a very important function, it is through the above-mentioned heat-transfer device 31 being arranged on air intake structure 13 to the while of being undertaken temperature controlled by the air of air intake structure 13, by the temperature of air being controlled within 0 DEG C described in the present embodiment～28 DEG C, thus realizing the humidity of the air entering into air filter is controlled.More specifically, exist between humidity and the temperature of air of air and contact intuitively very much, steam partial pressure and saturated volume water capacity in its air are just obviously reduced significantly depending on the decline of temperature, under normal atmosphere (0.1013MPa), in the saturated moist air of 50 DEG C, steam partial pressure is 0.0123MPa, and saturated volume water capacity is 83.2g m^-3, in the saturated moist air of 20 DEG C, steam partial pressure is 0.0023MPa, and saturated volume water capacity is 17.3g m^-3, in the saturated moist air of-10 DEG C, steam partial pressure is 0.00026MPa, and saturated volume water capacity is 2.2g m^-3.So above-mentioned air filter is by being controlled the temperature of air, ensure that the volume saturated humidity of the air entered in filter is present at least in certain numerical range, so, it is achieved the control to air humidity.And by the humid control of the above-mentioned air to passing into filter, it is achieved a kind of good filtration effect, steam is not easily condensed into the water of liquid or solid-state on filter assemblies, it is ensured that the strainability of air filter, also can effectively reduce the energy consumption of air filter.

So, in above-mentioned air filter, when the humidity in air is more than the volume saturated humidity of control temperature, air then can precipitate out water when by surface cooler 31, in the present embodiment, in the lower end of the hollow tubular structure inner chamber of shell 1, is provided with discharge structure.

Claims (10)

1. air filter, including shell (1) and filter assemblies (2), described filter assemblies (2) is installed on shell (1) inner chamber and is classified as pure qi (oxygen) chamber (12) and Primordial Qi chamber (11), shell (1) is provided with the air intake structure (13) connected with Primordial Qi chamber (11), it is characterised in that: region that is upper at described air intake structure (13) and/or that be positioned between described air intake structure (13) and filter assemblies (2) in Primordial Qi chamber (11) is provided with the temperature-adjusting device of air to be filtered.

2. air filter as claimed in claim 1, it is characterized in that: described shell (1) constitutes tubular construction, being provided with the air inlet as described air intake structure (13) on the sidewall of this tubular construction, described temperature-adjusting device correspondence is installed on air intake structure (13) place.

3. air filter as claimed in claim 2, it is characterized in that: described air intake structure (13) is interrupted around all bodies of tubular construction or offers continuously, then described temperature-adjusting device is formed and filter assemblies (2) is enclosed in tubular alternating temperature band therein.

4. air filter as claimed in claim 3, it is characterised in that: described temperature-adjusting device adopts surface cooler (31), and this surface cooler (31) is around tubular construction week body and be in communication with the outside and passed into heat-conducting medium.

5. air filter as claimed in claim 3, it is characterised in that: described air intake structure (13) is centered around tubular construction on all bodies of lower end.

6. air filter as claimed in claim 1, it is characterized in that: described filter assemblies (2) includes some chimney filters (22), this chimney filter (22) is installed on the orifice plate (21) being connected with shell (1) inwall.

7. air filter as claimed in claim 6, it is characterised in that: described chimney filter (22) all or most is surrounded by temperature-adjusting device.

8. air filter as claimed in claim 6, it is characterised in that: described chimney filter (22) includes supporter and is attached on this supporter the filter material of windward side.

9. air filter as claimed in claim 8, it is characterised in that: described chimney filter (22) includes by high density porous polyethylene supporter (222) and is adhering closely to the filter material that the expanded PTFE filtration membrane (221) on high density porous polyethylene supporter (222) surface is constituted；Described expanded PTFE filtration membrane (221) to the clearance of the dust of particle diameter >=0.5 μm in gas to be filtered more than 99%.

10. air filter as claimed in claim 1, it is characterised in that: described temperature-adjusting device is the temperature of air to be filtered is increased to 0 DEG C～10 DEG C or is reduced to the temperature-adjusting device of 10 DEG C～28 DEG C.