CN209646039U - A kind of purification device - Google Patents

Abstract

The utility model relates to gas purification technique fields, disclose a kind of purification device, including main body, air inlet pipe and an air outlet pipe, the boring of the main body, the air inlet pipe and the escape pipe are connected to the inner cavity of the main body respectively, and the sectional area of the air inlet pipe is less than the sectional area of the inner cavity.Since the density ratio mixed gas of particulate contaminants is big, during the mixed gas of oxalic acid and nitrogen flows in main body, impurity therein can gradually be settled down to bottom part body, and mixed gas can then flow out inner cavity.After the mixed gas of oxalic acid gas and nitrogen enters main body from air inlet pipe, since the sectional area of air inlet pipe is less than the sectional area of inner cavity, the flow velocity of mixed gas can be slowed by, so the time that mixed gas flows to escape pipe from air inlet pipe in purification device is longer, effectively extend the sedimentation time of particulate contaminants, the good purification of the purification device.

Description

A kind of purification device

Technical field

The utility model relates to gas purification technique field more particularly to a kind of purification devices.

Background technique

Metal powder injection molding is and to be injected into mold with injection molding machine with a certain proportion of bonding agent mixed metal powder In obtain certain shapes product a kind of metal forming technology.In entire production procedure, need to remove in metal powder Bonding agent is to obtain complete metal phase.

The main component of bonding agent is polyformaldehyde, further includes the ingredients such as PP, PE.Have in the prior art using nitric acid and oxalic acid Degreasing is carried out to remove the technical solution of polyformaldehyde to metal powder, since nitric acid has strong corrosive, human body may be caused Harm, and the discharge of the products such as its nitrogen oxides will cause atmosphere pollution, water pollution and soil pollution, it is basic in existing field Catalysis degreasing is carried out using oxalic acid.

But due to often containing particulate contaminants in oxalic acid raw material, oxalic acid is after high temperature distils, then in gaseous oxalic acid A large amount of small particulate contaminants can be mingled with will affect into if the oxalic acid with impurity is directly passed through catalysis degreasing furnace Product surface quality after the degreasing rate of type product and degreasing.

Utility model content

For overcome the deficiencies in the prior art, the utility model provides a kind of purification device, to solve to a certain extent Catalysis degreasing process mesoxalic acid has the technical issues of impurity.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of purification device, including main body, air inlet pipe and an air outlet pipe, the boring of the main body, the air inlet pipe and The escape pipe is connected to the inner cavity of the main body respectively, and the sectional area of the air inlet pipe is less than the sectional area of the inner cavity.

As a further improvement of the utility model, the junction of the air inlet pipe and the main body and the escape pipe with It is mutually staggered in the horizontal direction between the junction of the main body.

The length direction of the inner cavity is parallel to horizontal direction, the air inlet as a further improvement of the utility model, Pipe and the escape pipe are connected to the both ends of the inner cavity respectively.

The ratio of the sectional area of the air inlet pipe and the sectional area of the inner cavity as a further improvement of the utility model, Between 1:50~1:20.

The outer surface of the main body is enclosed with first heater as a further improvement of the utility model,.

The outer surface of the first heater is enclosed with the first heat preservation dress as a further improvement of the utility model, It sets.

The first heater is heating wire as a further improvement of the utility model, and the heating wire winding exists The outer surface of the main body.

The outer surface of the air inlet pipe and the escape pipe is enclosed with second and adds as a further improvement of the utility model, Thermal.

The outer surface of the secondary heating mechanism is enclosed with the second heat preservation dress as a further improvement of the utility model, It sets.

The secondary heating mechanism is heating wire as a further improvement of the utility model, and the heating wire winding exists The outer surface of the air inlet pipe and the escape pipe.

The beneficial effects of the utility model are:

The purification device includes main body and the air inlet pipe and an air outlet pipe that is connected to respectively with the inner cavity of main body, the section of air inlet pipe Product is less than the sectional area of above-mentioned inner cavity.

The mixed gas of oxalic acid gas and nitrogen enters main body from air inlet pipe, since the sectional area of air inlet pipe is less than inner cavity Sectional area, so the flow velocity of mixed gas can be slowed by, then mixed gas flows to escape pipe from air inlet pipe in purification device Time it is longer.

It is miscellaneous during mixed gas flows in main body again since the density ratio mixed gas of particulate contaminants is big Matter can gradually be settled down to bottom part body, and mixed gas can then flow out inner cavity.Mixed gas flow velocity in main body slows down, and effectively extends The sedimentation time of particulate contaminants, the good purification of the purification device.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is a kind of cross-sectional view of purification device.

Specific embodiment

It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation Clear, complete description, to be completely understood by the purpose of this utility model, scheme and effect.It should be noted that not conflicting In the case where, the features in the embodiments and the embodiments of the present application can be combined with each other.

It should be noted that unless otherwise specified, when a certain feature referred to as " fixation ", " connection " are in another feature, It can directly fix, be connected to another feature, and can also fix, be connected to another feature indirectly.In addition, this The descriptions such as up, down, left, right, before and after used in utility model are only relative to each composition portion of the utility model in attached drawing For the mutual alignment relation divided.

In addition, unless otherwise defined, the technology of all technical and scientific terms used herein and the art The normally understood meaning of personnel is identical.Term used in the description is intended merely to description specific embodiment herein, without It is to limit the utility model.Term " and or " used herein includes appointing for one or more relevant listed items The combination of meaning.

Referring to Fig.1, a kind of cross-sectional view of purification device is shown, graphic arrow direction is the stream of gas in the purification device To.The purification device includes main body 1, air inlet pipe 2 and escape pipe 3.

Main body 1 is cylinder, and inner hollow forms a cylindrical inner cavity, the length direction and horizontal direction of the inner cavity In parallel.

Air inlet pipe 2 and escape pipe 3 are hollow tubular, the junction and escape pipe 3 of air inlet pipe 2 and main body 1 and main body 1 junction mutually staggers in the horizontal direction, i.e., two pipes and the junction of main body 1 are equipped with certain distance in the horizontal direction.It is preferred that , air inlet pipe 2 is fixed in the left end of main body 1, and escape pipe 3 is fixed in the right end of main body 1.

To enter mixed gas, 1 inner cavity change in flow of main body is obvious, the sectional area of air inlet pipe 2 and cutting for 1 inner cavity of main body The ratio of area is between 1:50~1:20, it is preferred that above-mentioned ratio is selected as 1:30, then stream of the mixed gas in main body 1 Speed is a thirtieth in air inlet pipe 2.

The outer surface of main body 1 is installed with first heater；The outer surface of air inlet pipe 2 and escape pipe 3 is enclosed with second and adds Thermal.

Preferably, first heater is heating wire, is wrapped in the outer surface of main body 1；Secondary heating mechanism is heating wire, It is wrapped in the outer surface of air inlet pipe 2 and escape pipe 3.It should be appreciated that first heater and secondary heating mechanism are also possible to electricity Other heating devices such as hot blanket.

Further, the outer surface of main body 1, air inlet pipe 2 and escape pipe 3 is fixedly provided with attemperator.Specifically, first adds The outer surface of thermal is equipped with the first attemperator, it is preferred that the first attemperator is heat insulation foam, and the first attemperator is wrapped in The outer surface of main body 1；The outer surface of secondary heating mechanism is equipped with the second attemperator, it is preferred that the second attemperator is heat-insulated Cotton, the second attemperator are wrapped in the outer surface of main body 1.

The appearance in first heater (or secondary heating mechanism) is arranged in first attemperator (or second attemperator) Face, the heat losses for preventing first heater (or secondary heating mechanism) from generating.In addition, the first attemperator (or the second guarantor Warm device) it is also possible to the heat-barrier materials such as rubber resistant to high temperature.

Characteristic and attached drawing below in conjunction with oxalic acid are briefly described the course of work of the purification device:

Colourless column crystal under oxalic acid room temperature, it is soluble easily in water and insoluble in the organic solvents such as ether.Anhydrous oxalic acid Fusing point is 187 DEG C, starts to distil at 100 DEG C, and 125 DEG C of whens distil rapidly, and 157 DEG C of whens largely distil, and start to decompose.

According to the above characteristic, the mixed gas that oxalic acid gas and nitrogen are mixed to form is passed through air inlet pipe 2 first, then flow into The inner cavity of main body 1.

Since main body 1 is much larger than perpendicular to the sectional area of axis the sectional area of air inlet pipe 2, so mixed gas is from air inlet pipe 2 flow into after main body 1, and flow velocity can obviously slow down, i.e., mixed gas flowed in main body 1 from inlet end time of outlet side compared with It is long.

Because oxalic acid, nitrogen be mixed in the mistake that impurity density therein is not identical, and mixed gas flows from left to right Cheng Zhong, the impurity in oxalic acid can gradually precipitate under gravity；And mixed gas then will flow out this from escape pipe 3 only Makeup is set.Again since mixed gas is longer in 1 inner cavity residence time of main body, so the effect of contamination precipitation is good.

According to the characteristic of above-mentioned oxalic acid, it is known that condensation can occur to the cold for the oxalic acid after gasification, so setting exists Above structure is heated to set temperature by the heating device on main body 1, air inlet pipe 2 and escape pipe 3, which is in oxalic acid Sublimation temperature and decomposition temperature between so that oxalic acid maintains gaseous state.Preferably, set temperature is in 100 DEG C~120 Between DEG C.

Attemperator is wrapped in the outer surface of heating device, reduces main body 1, air inlet pipe 2, escape pipe 3 and heating device Heat dissipation, the heating frequency of heating device can be reduced.

The utility model also provides another purification device, is clarifier with the main difference of the first purification device The structure of main body: the body shape and non-cylindrical of second of purification device, but cuboid, and its bottom is detachable knot Structure.

The advantages of second of purification device:

Because impurity is settled down to bottom part body under gravity, the device is after long-time purifies work, bottom Portion will accumulate a large amount of impurity.

And the bottom part body of the purification device is dismountable, so can be incited somebody to action when sedimentation has excessive impurity on bottom Bottom disassembles independent cleaning, assembles and can continue to use after cleaning.

In addition, main body can also be other shapes, as long as it has a demountable bottom, it is preferred that institute State the largest contours based on the profile of bottom in numerous horizontal cross-section.

It should be appreciated that either the first purification device or second of purification device, be limited to purification oxalic acid, It can also be applied to conventional mixed gas, as being non-gaseous state under flue gas, tail gas or normal temperature and pressure, and working condition It is gaseous gas etc..

It is illustrating for progress to be implemented to the preferable of the utility model, but the invention is not limited to the reality above Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention Or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.

Claims (10)

1. a kind of purification device, which is characterized in that including main body, air inlet pipe and an air outlet pipe, the boring of the main body is described Air inlet pipe and the escape pipe are connected to the inner cavity of the main body respectively, and the sectional area of the air inlet pipe is less than cutting for the inner cavity Area.

2. purification device according to claim 1, which is characterized in that the junction and institute of the air inlet pipe and the main body It states and is mutually staggered in the horizontal direction between escape pipe and the junction of the main body.

3. purification device according to claim 2, which is characterized in that the length direction of the inner cavity is parallel to level side To the air inlet pipe and the escape pipe are connected to the both ends of the inner cavity respectively.

4. purification device according to claim 1, which is characterized in that section of the sectional area of the air inlet pipe and the inner cavity The ratio of area is between 1:50~1:20.

5. purification device according to claim 1, which is characterized in that the outer surface of the main body is enclosed with the first heating dress It sets.

6. purification device according to claim 5, which is characterized in that the outer surface of the first heater is enclosed with One attemperator.

7. purification device according to claim 5, which is characterized in that the first heater is heating wire, the electricity Heated filament is wrapped in the outer surface of the main body.

8. purification device according to claim 1, which is characterized in that the appearance bread of the air inlet pipe and the escape pipe It is wrapped with secondary heating mechanism.

9. purification device according to claim 8, which is characterized in that the outer surface of the secondary heating mechanism is enclosed with Two attemperators.

10. purification device according to claim 8, which is characterized in that the secondary heating mechanism is heating wire, the electricity Heated filament is wrapped in the outer surface of the air inlet pipe and the escape pipe.