CN201329230Y

CN201329230Y - Novel filtering device

Info

Publication number: CN201329230Y
Application number: CNU2008201682879U
Authority: CN
Inventors: 谷文松; 陈生龙
Original assignee: HANGZHOU JUGUANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD; Juguang Sci & Tech (hangzhou) Co Ltd
Current assignee: Hangzhou Juguang Environmental Protection Technology Co.,Ltd.; Focused Photonics Hangzhou Inc
Priority date: 2008-11-19
Filing date: 2008-11-19
Publication date: 2009-10-21
Anticipated expiration: 2018-11-19

Abstract

The utility model discloses a novel filtering device, which comprises a filtering cylinder, a filtering screen and a heating device arranged on the filtering cylinder; the filtering screen has at least two layers, an the two layers are arranged in the filtering cylinder in sequence in the direction of filtered gas, and the compactness of the screen gradually becomes larger. The utility model has the advantages of good filtering effect, good maintainability, easily realizable explosion-proof function and the like, and can be widely applied to the filtering process of the gas containing dust and water vapor.

Description

A kind of novel filter

Technical field

The utility model relates to filtering flow, particularly a kind of novel filter at the gas that contains particles such as dust, steam.

Background technology

In fields such as environmental protection, metallurgy, chemical industry, need the gas to be measured in sampling pipe or the flue, deliver to afterwards in the measuring chamber and measure, obtain the parameters such as concentration of gas to be measured after by analysis, and instruct production according to recording parameter.

In above-mentioned application, contain particles such as dust, steam or the sour gas of more amount in the gas to be measured usually, as sulfur dioxide, nitrogen oxide, this can bring inconvenience to measurement, as:

Particles such as dust can stop up devices such as measuring pipeline and measuring chamber, also can damage gas measurement device, as gas measuring transducer, measurement can't be carried out.

Steam in the gas is the meeting condensation in pipeline, and on the one hand, dust can combine with condensed water and be attached on pipeline, measuring chamber, the measurement mechanism, and then stops up described pipeline, measuring chamber etc.; On the other hand, sour gas soluble in water is dissolved in the condensed water, has corrosive acid thereby form, and tends to erode devices such as pipeline, measuring chamber, measurement mechanism, and measurement can't be carried out.

For accuracy and the continuity that improves measurement, take following treatment measures in the prior art:

1, the use filter filters out the particles such as dust in the gas to be measured, prevents to stop up and damage each device;

2, devices such as the hot whole sampler of companion, pipeline, measuring chamber make gas to be measured keep higher temperature, as 120 ℃, have avoided water vapor condensation in the gas.

As shown in Figure 1, a kind of heating and filtering device of being used widely at present comprises cartridge filter 1, heater and ceramic element 4.Heater adopts Electric heating, and heating electrode 3, heating plate 2 are arranged on the periphery of cartridge filter 1, is used for the gas to be measured in the heating and filtering tube 1, has prevented water vapor condensation in the gas.Gas to be measured enters in the cavity 5 between ceramic element 4 and the cartridge filter 1, has filtered out the particles such as dust in the gas through ceramic element 4 afterwards, has prevented the obstruction and the damage of pipeline, measuring chamber etc.Gas to be measured after the filtration is 6 discharges from the gas outlet.

But above-mentioned heating and filtering device also has deficiency, is mainly:

1, poor filtration effect.Adopt the rigid ceramic element of one-level, stop up easily: for the filter effect that obtains, the filtering holes on the filter core is very little, but easier obstruction; Filtering holes can not be big, otherwise poor filtration effect.

2, maintainable poor, when ceramic element stops up, adopt the particle on the blowback cleaning filter core, because pottery is a hard material, there is not elasticity, the blowback cleaning effect is poor.

3, owing to adopt Electric heating,, improved and realized the explosion-proof difficulty of whole measuring system therefore in the explosion-proof workplace of needs.

The utility model content

In order to overcome deficiency of the prior art, the utility model provides a kind of good filtration effect, maintainable good, the novel filter that is easy to realize explosion prevention function.

For achieving the above object, the utility model is by the following technical solutions:

A kind of novel filter comprises cartridge filter, screen pack, is arranged on the heater on the cartridge filter; Described screen pack is at least two-layer, be successively set in the cartridge filter to be filtered on the airflow direction, and fine and closely woven degree becomes big gradually.

As preferably, described heater is by forming with the lower part: the cavity that is arranged on described cartridge filter periphery; The air inlet and the gas outlet that are communicated with described cavity.

As preferably, described screen pack adopts being filtered under the gas shock, and elastically-deformable material can take place.

As preferably, described screen pack is three layers.

Compared with prior art, the utlity model has following beneficial effect:

1, good filtration effect, adopt classified filtering mode successively: the screen pack that filtering holes is big filters out big particle earlier, and after the little screen pack of filtering holes after filtering little particle, screen pack is difficult for stopping up.

2, maintainable good, adopt the screen pack multistage, that filtering holes diminishes gradually, and screen pack has elasticity, under the impact of purge gas, screen pack can be shaken, thereby has cleared up the particles such as dust on the screen pack better.

3, adopt the Steam Heating mode, be easy to realize explosion prevention function; Steam also is standing in fields such as chemical industry.

Description of drawings

Fig. 1 is a kind of structural representation of existing heating and filtering device;

Fig. 2 is the structural representation of filter among the embodiment 1;

Fig. 3 is the structural representation of filter among the embodiment 2.

The specific embodiment

Following examples have been done further instruction to situations such as structure of the present utility model, function and applications, are several reasonable application forms of the utility model, but scope of the present utility model is not confined to following embodiment.

Embodiment 1:

As shown in Figure 2, a kind of novel filter is applied in the measurement of chemical plant acetylene, and (content is at 2000 gram/rice to contain dust in the acetylene gas ³About), steam etc., acetylene or flammable explosive gas; Therefore need filter out dust in the acetylene gas, prevent steam condensation, accomplish explosion-proof work.Described novel filter comprises cartridge filter 11, heater, screen pack.

Screen pack is made up of first screen pack 31 and second screen pack 32, be installed in successively on air-flow 41 directions in the described cartridge filter 11, and it is 90 orders that the fine and closely woven degree of second screen pack 32 is higher than 31: the first screen packs 31 of first screen pack, and second screen pack 32 is 110 orders.Screen pack adopts has elasticity, corrosion-resistant, resistant to elevated temperatures material, and as stainless steel, screen pack under the impact of air-flow elastic deformation can take place.

Described heater adopts the Steam Heating mode, comprising: be arranged on the cavity 22 of cartridge filter periphery, the air inlet 21 that is communicated with cavity and gas outlet 23.

The course of work of above-mentioned novel filter is as follows:

In cartridge filter 11, the particle that particle diameter is big in the gas is stopped by first screen pack 31, rests on first screen pack 31, and the particle that particle diameter is little in the gas is then by first screen pack 31;

The gas that carries small particle is filtered by second screen pack 32: the particle that particle diameter is little is stopped by second screen pack 32, rests on second screen pack 32;

In above-mentioned filter process, the high-temperature steam that vapour source provides enters in the described cavity 22 by described air inlet 21, has heated the gas in the cartridge filter 11, has prevented the condensation of steam in the gas, and this Steam Heating mode also is beneficial to system and realizes explosion prevention function.

After the described novel filter work long period, obstruction to a certain extent can take place in first screen pack 31 and second screen pack 32, needs to use described first screen pack 31 of clean gas blowback and second screen pack 32 this moment:

Clean gas purges described second screen pack 32 and first screen pack 31 successively, elastically-deformable stainless steel material can take place because screen pack adopts, therefore, when purge gas purges second screen pack 32 and first screen pack 31 discontinuously, screen pack can be shaken, be more conducive to the particle on the screen pack is blown off, cleaning effect is good.

Embodiment 2:

As shown in Figure 3, a kind of novel filter is applied in the flue gas discharge continuous monitoring system (CEMS) of thermal power plant, contains sour gas (as sulfur dioxide, nitrogen oxide), steam in the flue gas, (content is at 2500 gram/rice for dust ³About), therefore need filter out dust in flue gas, also to prevent water vapor condensation, with avoid sour gas to be dissolved in forming in the condensed water to have corrosive acid, dust combines with condensed water.

Described novel filter is as different from Example 1:

1, in order to obtain better filter effect, the screen pack that haves three layers is set in the cartridge filter, the fine and closely woven degree of 3 layers of screen pack installing along air-flow 41 directions becomes big gradually: first screen pack 31 is 70 orders, and second screen pack 32 is 100 orders, and the 3rd screen pack 33 is 130 orders.

2, the material that adopts of described screen pack is a teflon, and is corrosion-resistant, have elasticity and anti-uniform temperature, as 200 ℃.

The course of work of above-mentioned filter is similar to Example 1.

Supplemental instruction about the foregoing description: the precision of screen pack can be provided with flexibly according to the needs of The field, and easy accessibility.

Above-mentioned embodiment should not be construed as the restriction to the utility model protection domain.Key of the present utility model is, two-layer at least screen pack is installed in cartridge filter, and the filtering accuracy of the screen pack of installing along airflow direction becomes greatly gradually, and the mode of Guo Lving has improved filter effect step by step.Under the situation that does not break away from the utility model spirit, any type of change that the utility model is made all should fall within the protection domain of the present utility model.

Claims

1, a kind of novel filter comprises cartridge filter, screen pack, is arranged on the heater on the cartridge filter; It is characterized in that: described screen pack is at least two-layer, be successively set in the cartridge filter to be filtered on the airflow direction, and fine and closely woven degree becomes big gradually.

2, filter according to claim 1 is characterized in that: described heater is by forming with the lower part:

Be arranged on the cavity of described cartridge filter periphery;

The air inlet and the gas outlet that are communicated with described cavity.

3, filter according to claim 1 is characterized in that: described screen pack adopts and is being filtered the elastically-deformable material of meeting generation under the gas shock.

4, according to the arbitrary described filter of claim 1 to 3, it is characterized in that: described screen pack is three layers.