CN213313828U - High-efficient type VOCs analysis gas circuit protection filter - Google Patents

Abstract

The utility model relates to the technical field of filter equipment, in particular to a high-efficiency VOCs analysis gas circuit protection filter, which comprises a filter body and a peristaltic pump, and the utility model leads a gas port, a gas outlet and a water outlet to be communicated in a straight-through way, thereby leading liquid water and impurities to flow to the water outlet more smoothly and reducing the blockage caused by the adhesion of the liquid water and the impurities on the surface of a filter element; the heating rod is arranged in the mounting base, so that the interior of the filter bin can be effectively heated, and the gaseous water in the sample gas can not be condensed; the PTFE filtering membrane is a hydrophobic filtering sheet, so that the air permeability is good, liquid water is effectively blocked, gas-liquid separation is ensured, and the acetic acid filtering membrane is arranged, so that tar components in sample gas can be filtered, and the pipeline is prevented from being blocked by tar at the rear end; through filter closing cap and filtration storehouse looks threaded connection, make the filter closing cap install and dismantle more easily, make things convenient for the change of interior filter membrane of filtration storehouse.

Description

High-efficient type VOCs analysis gas circuit protection filter

Technical Field

The utility model relates to a filter equipment technical field specifically is a high-efficient type VOCs analysis gas circuit protection filter.

Background

In the continuous monitoring system of VOCs flue gas, the impurity such as liquid water, tar is being mixed to the sample gas that is surveyed often, and the inside pipeline latus rectum of chromatographic analysis instrument that corresponds is very little, about 0.6mm, and this clean degree requirement to the sample gas is quite high. The filter performance selected for the VOCs monitoring system is critical.

At present, common domestic common filters have certain functions of filtering dust and oil stains, but the filtering effect is far from enough. The common glass fiber filtering membrane is directly soaked by liquid water, and the common membrane filter in figure 1 has no drainage function and loses the filtering effect quickly; and a cylindrical filter is arranged, as shown in fig. 2, although the cylindrical filter is provided with a water outlet, impurities such as water, tar and the like pass through the filter element at the same time due to the complex gas path and the winding and winding, and the filter element of the cylindrical filter is not heated, so that the filter element of the cylindrical filter is blocked quickly under severe working conditions, the filter element is frequently replaced, the maintenance workload is large, the cost is high, and the enterprise burden is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high-efficient type VOCs analysis gas circuit protection filter to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a high-efficiency VOCs analysis gas circuit protection filter comprises a filter body and a peristaltic pump, wherein an air inlet and an air outlet are formed in two ends of the top of the filter body, a water outlet is formed in the bottom of the filter body, the peristaltic pump is arranged on the side face of the filter body, a water inlet and a water outlet are formed in two sides of the bottom of the peristaltic pump, and a connecting pipe is connected between the water outlet and the water inlet;

the filter body includes the mounting base and crosses the filter house, the mounting base sets up at the filter body inner chamber back, the heating rod is installed to mounting base inner chamber bottom, the mounting base openly is provided with the cross section in the filter body inner chamber and is the circular shape and crosses the filter house, it has ventilative module to cross filter house inner chamber back mounted, one deck acetate filtration membrane has been laid on ventilative module surface, the PTFE filtration membrane has openly been laid, PTFE filtration membrane openly installs the fixed lid of filter membrane, it openly has the fixed lid of filter membrane in filter body surface intermediate junction to cross the filter house.

Preferably, the air inlet and the air outlet are communicated with the top of the filtering bin, the water outlet is communicated with the bottom of the filtering bin, and the air inlet, the air outlet and the water outlet are corresponding to each other in the vertical direction, so that the air inlet, the air outlet and the water outlet are communicated in a straight-through manner, and liquid water and impurities are better discharged from the water outlet.

Preferably, the heating rod sets up in the middle of filtering the storehouse back, and closely laminates, and better heats whole filtration storehouse, and gaseous state water can not condense in the messenger's sample gas.

Preferably, acetic acid filtration membrane and ventilative module junction are provided with first O type circle, the fixed lid of filter membrane is provided with second O type circle with filter closing cap junction, increases the leakproofness in whole filtration storehouse, prevents that the appearance gas from leaking.

Preferably, the filter sealing cover is in threaded connection with the filter bin, so that the filter sealing cover is easier to mount and dismount, and a filter membrane in the filter bin is convenient to replace.

Compared with the prior art, the beneficial effects of the utility model are that: the gas port, the gas outlet and the water outlet are communicated in a straight-through mode, and the principle that liquid water and impurities in airflow have larger inertia than that of gas flow is utilized, so that the liquid water and the impurities can flow to the water outlet more smoothly, and the adhesion of the liquid water and the impurities on the surface of the filter element to cause blockage is reduced; the heating rod is arranged in the mounting base, so that the interior of the filtering bin can be effectively heated, the gaseous water in the sample gas is prevented from being condensed, and the service life of the filtering membrane is prolonged; by arranging the PTFE filtering membrane which is a hydrophobic filtering sheet, no water seepage can be caused under the pressure of 100kpa, the gas-liquid separation is ensured due to good air permeability and liquid water is effectively blocked, and the tar component in the sample gas can be filtered by arranging the acetic acid filtering membrane, so that the pipeline is prevented from being blocked by the tar at the rear end; through filter closing cap and filtration storehouse looks threaded connection, make the filter closing cap install and dismantle more easily, make things convenient for the change of interior filter membrane of filtration storehouse.

Drawings

FIG. 1 is a schematic diagram of a conventional membrane filter;

FIG. 2 is a schematic view of a conventional cylindrical filter;

fig. 3 is a schematic front structural view of the present invention;

fig. 4 is a schematic side view of the present invention;

fig. 5 is a schematic view of the internal structure of the filter body according to the present invention.

In the figure: 1. a filter body; 2. a peristaltic pump; 3. an air inlet; 4. an air outlet; 5. a filter cover; 6. a water outlet; 7. a connecting pipe; 8. a water inlet; 9. a water outlet; 10. mounting a base; 11. a heating rod; 12. a filtering bin; 13. acetic acid filtering membrane; 14. a first O-ring; 15. a PTFE filter membrane; 16. a filter membrane fixing cover; 17. a second O-ring; 18. and a ventilation module.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-5, the present invention provides a technical solution: a high-efficiency VOCs analysis gas circuit protection filter comprises a filter body 1 and a peristaltic pump 2, wherein an air inlet 3 and an air outlet 4 are formed in two ends of the top of the filter body 1, a water outlet 6 is formed in the bottom of the filter body 1, the peristaltic pump 2 is arranged on the side surface of the filter body 1, a water inlet 8 and a water outlet 9 are formed in two sides of the bottom of the peristaltic pump 2, and a connecting pipe 7 is connected between the water outlet 6 and the water inlet 8;

filter body 1 includes mounting base 10 and crosses filter chamber 12, mounting base 10 sets up at the 1 inner chamber back of filter body, heating rod 11 is installed to mounting base 10 inner chamber bottom, mounting base 10 openly is provided with the cross section in 1 inner chamber of filter body and is the circular shape cross filter chamber 12, cross filter chamber 12 inner chamber back mounted and have ventilative module 18, ventilative module 18 surface has laid one deck acetate filtration membrane 13, acetate filtration membrane 13 has openly laid PTFE filtration membrane 15, PTFE filtration membrane 15 openly installs the fixed lid of filter membrane 16, it openly has the fixed lid of filter membrane 16 to cross filter chamber 12 in the filter body 1 surperficial intermediate junction of surface.

Further, the air inlet 3 and the air outlet 4 are communicated with the top of the filtering bin 12, the water outlet 6 is communicated with the bottom of the filtering bin 12, the air inlet 3, the air outlet 4 and the water outlet 6 are corresponding to each other in the vertical direction, so that the air inlet 3, the air outlet 4 and the water outlet 6 are communicated in a straight-through mode, and liquid water and impurities are better discharged from the water outlet 6.

Further, the heating rod 11 is arranged in the middle of the back of the filtering bin 12 and is tightly attached, the whole filtering bin 12 is better heated, and gaseous water in sample gas can not be condensed.

Furthermore, a first O-shaped ring 14 is arranged at the joint of the acetic acid filtering membrane 13 and the ventilation module 18, and a second O-shaped ring 17 is arranged at the joint of the filtering membrane fixing cover 16 and the filtering cover 5, so that the sealing performance of the whole filtering bin 12 is improved, and the sample gas is prevented from leaking.

Furthermore, the filter sealing cover 5 is in threaded connection with the filter bin 12, so that the filter sealing cover 5 is easier to mount and dismount, and the filter membrane in the filter bin 12 is convenient to replace.

The working principle is as follows: during the use, the sample gas gets into the filter bin 12 of filtering inside the filter body 1 from air inlet 3, gets into and filters the storehouse 12 after, by air inlet 3 and outlet 6 corresponding, utilizes the principle that liquid water and impurity in the air current are big than the gas flow inertia, lets liquid water and impurity more smooth flow to the outlet, has reduced water and impurity and has attached to on PTFE filter membrane 13 surface. The sample gas passes through the PTFE filtering membrane 13 and then contacts the acetic acid filtering membrane 15, the acetate fiber has an adsorption effect on tar, and when the sample gas contains tar substances, the tar substances are adsorbed by the acetic acid filtering membrane 15, so that the tar adsorption effect is achieved. The mounting base 10 is equipped with the heating rod 11, and the heating rod 11 is to filtering storehouse 12 whole heating, guarantees that the inside temperature of filtering storehouse 12 is higher than sample gas dew point to the gaseous state water in the sample gas of having ensured can not liquefy. Then the liquid water is continuously sucked out from the interior of the filter bin 12 through the peristaltic pump 2 and discharged, and gas is ensured not to flow out of the water outlet. When the filter membrane is replaced, only the filter sealing cover 5 needs to be screwed down, the air circuit connection does not need to be disconnected, the working efficiency is improved, and air leakage of the air circuit caused by the fact that the secondary installation is not in place is avoided.

The gas port 3, the gas outlet 4 and the water outlet 6 are communicated in a straight-through mode, and the principle that liquid water and impurities in airflow have larger flowing inertia than gas is utilized, so that the liquid water and the impurities can flow to the water outlet more smoothly, and the adhesion of the liquid water and the impurities on the surface of the filter element to cause blockage is reduced; the heating rod 11 is arranged in the mounting base 10, so that the interior of the filtering bin 12 can be effectively heated, the gaseous water in the sample gas can not be condensed, and the service life of the filtering membrane is prolonged; by arranging the PTFE filtering membrane 13 and the PTFE filtering membrane 13 is a hydrophobic filtering sheet, no water seepage can be caused under the pressure of 100kpa, the air permeability is good, liquid water is effectively blocked, gas-liquid separation is ensured, and the tar component in the sample gas can be filtered by arranging the acetic acid filtering membrane 15, so that the pipeline is prevented from being blocked by the tar at the rear end, and the PTFE filtering membrane 13 and the acetic acid filtering membrane 15 form a double-layer filtering structure, so that the dust and the oil stain of the sample gas are effectively removed, and the practicability of the device is greatly improved; through filter closing cap 5 and filtration storehouse 12 looks threaded connection, make filter closing cap 5 install and dismantle more easily, make things convenient for the change of the interior filter membrane of filtration storehouse 12.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a high-efficient type VOCs analysis gas circuit protection filter, includes filter body (1) and peristaltic pump (2), its characterized in that: an air inlet (3) and an air outlet (4) are formed in two ends of the top of the filter body (1), a water outlet (6) is formed in the bottom of the filter body (1), a peristaltic pump (2) is arranged on the side face of the filter body (1), a water inlet (8) and a water outlet (9) are formed in two sides of the bottom of the peristaltic pump (2), and a connecting pipe (7) is connected between the water outlet (6) and the water inlet (8);

filter body (1) includes mounting base (10) and crosses filter bin (12), mounting base (10) set up at filter body (1) inner chamber back, heating rod (11) are installed to mounting base (10) inner chamber bottom, mounting base (10) openly are provided with the cross section in filter body (1) inner chamber and are circular shape cross filter bin (12), cross filter bin (12) inner chamber back mounted and have ventilative module (18), one deck acetate filtration membrane (13) have been laid on ventilative module (18) surface, acetate filtration membrane (13) have openly been laid PTFE filtration membrane (15), PTFE filtration membrane (15) openly install filter membrane fixed lid (16), cross filter bin (12) openly have filter membrane fixed lid (16) in filter body (1) surface intermediate junction.

2. The high efficiency VOCs analysis gas path protection filter of claim 1, wherein: the air inlet (3) and the air outlet (4) are communicated with the top of the filtering bin (12), the water outlet (6) is communicated with the bottom of the filtering bin (12), and the air inlet (3), the air outlet (4) and the water outlet (6) correspond to each other in the vertical direction.

3. The high efficiency VOCs analysis gas path protection filter of claim 1, wherein: the heating rod (11) is arranged in the middle of the back of the filtering bin (12) and is tightly attached.

4. The high efficiency VOCs analysis gas path protection filter of claim 1, wherein: a first O-shaped ring (14) is arranged at the joint of the acetic acid filtering membrane (13) and the ventilation module (18), and a second O-shaped ring (17) is arranged at the joint of the filtering membrane fixing cover (16) and the filter sealing cover (5).

5. The high efficiency VOCs analysis gas path protection filter of claim 4, wherein: the filter sealing cover (5) is in threaded connection with the filter bin (12).

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