CN217526978U - Acidic waste gas purification device and acidic atmosphere corrosion test system - Google Patents

Abstract

The utility model belongs to the technical field of acidic atmosphere corrosivity test equipment, and provides an acidic waste gas purification device and an acidic atmosphere corrosion test system for solving the problem of acidic waste gas purification, which comprise a closed neutralization chamber, wherein the neutralization chamber is used for containing alkaline liquid; the first air inlet pipe extends into the neutralization chamber and extends to a position near the bottom of the neutralization chamber; the upper part or the top of the neutralization chamber is communicated with an air inlet of the filter chamber; a condensing layer with air permeable gaps is arranged in the filtering chamber; and an acid waste gas outlet of the test box is communicated with the first air inlet pipe, so that the acid waste gas is sent into the acid waste gas purification device to be purified and then is discharged. The acid atmospheric corrosion test system of the utility model adopts a positive pressure acid-base neutralization method, a bubbling mechanism active adsorption method and the like, so that acid mist generated by the mist generator is filtered when being discharged to the outside; the PH value of the tail gas discharged is slightly larger than 7 and is alkalescent, and the specified discharge value is reached.

Description

Acidic waste gas purification device and acidic atmosphere corrosion test system

Technical Field

The utility model belongs to the technical field of acidic atmosphere corrosivity test equipment, in particular to an acidic waste gas purification device and an acidic atmospheric corrosion test system.

Background

Acid waste gas is generated in the acid atmosphere corrosion test process, and direct emission causes pollution to the environment, so that the acid waste gas needs to be purified and then emitted. At present, an acid atmospheric corrosion test box has no effective tail gas filtering system, so that the environment is greatly influenced.

Chinese patent publication CN202078849U discloses a bubbling device for removing acid gas, the lower part of the inner cavity of a box body is an absorption liquid cavity, the upper part is a purified gas cavity communicated with the absorption liquid, a demister for removing purified gas water mist is arranged in the purified gas cavity, and the upper part of the box body is provided with an exhaust port; the inner cavity of the box body is provided with a gas distribution main pipe, and one end of the gas inlet pipe extends into the inner cavity of the box body and is connected and communicated with the gas distribution main pipe; a plurality of gas distribution branch pipes connected and communicated with the gas distribution main pipe are arranged; several groups of jet pipes connected with the gas distributing branch pipes and communicated with the gas distributing branch pipes are arranged, and the lower ends of the jet pipes and the outlets thereof are positioned in the absorption liquid cavity of the inner cavity of the box body. The demister is used for removing water vapor in gas and has the following principle: due to the inertial impact action of the gas, the liquid drops are separated from the surface of the corrugated plate when the liquid drops are gathered because the mist collides with the corrugated plate and the gravity generated by the liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid. However, the demister is large in size, and the whole device is bulky, so that the demister is not suitable for small and medium-scale application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the difficult problem that exists among the above-mentioned prior art, provide an acid exhaust gas purification device, broken away from the reliance to the defroster, the volume is dwindled greatly, is applicable to small and medium-scale test system.

The utility model discloses a realize through following technical scheme:

an acidic waste gas purification device comprises a closed neutralization chamber, wherein the neutralization chamber is used for containing alkaline liquid; the first air inlet pipe extends into the neutralization chamber and extends to a position near the bottom of the neutralization chamber; upper part or top part of the neutralization chamber an air inlet communicated with the filter chamber; a condensing layer with a ventilation gap is arranged in the filtering chamber.

Furthermore, an adsorption layer is arranged in the filter chamber, and a condensation layer and the adsorption layer are sequentially arranged from the air inlet to the air outlet of the filter chamber.

Furthermore, the condensation layer is filled with a metal wire mesh or metal particles.

Furthermore, the adsorption layer is filled with activated carbon.

The utility model also provides an acid atmosphere corrosion test system can be so that acid exhaust purification back discharges, and is specific, including proof box and above-mentioned acid exhaust purification device, the acid exhaust gas discharge port intercommunication of proof box first intake pipe for acid exhaust gas is sent into obtain discharging after purifying among the acid exhaust purification device.

Further, a solution storage chamber is arranged in the test box, and a mist making nozzle is arranged in the solution storage chamber; the mist making nozzle is communicated with an air chamber in the bubble column through a pipeline; and compressed air is introduced into the bubbling tower through a second air inlet pipe which is inserted into the bubbling tower and extends to the position near the bottom of the bubbling tower, so that the compressed air enters the fog making nozzle after bubbling treatment.

Further, the solution storage chamber is arranged at the bottom of the test chamber, the sample rack is arranged at the middle layer of the test chamber, and the acid waste gas outlet is arranged at the top of the test chamber.

Furthermore, the box wall of the test box is heated through the first heating device, so that the acid mist formed in the test box through the mist making nozzle obtains the heat radiation of the box wall, and the temperature required by the test box is controlled.

Further, a second heating device for heating the liquid in the bubble column is arranged in the bubble column.

Furthermore, the top of the test box is in a shape of a sharp top with a high middle and two low sides.

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

1. the utility model discloses an acid exhaust gas enters into neutralization chamber bottom through first intake pipe among the acid exhaust gas purification device, because gas density is less than liquid density, acid exhaust gas gets into and takes place the tympanic bulla in liquid in the neutralization chamber, can be even take place neutralization reaction with alkaline liquid, rise to neutralization chamber upper space after getting rid of the acidity, discharge after filtering through the filter chamber. Set up the condensation layer in the filter chamber, get rid of the steam in the gas through the mode of condensation, needn't rely on the defroster, consequently can reduce the volume greatly.

2. And an adsorption layer is added to remove particles in the gas, so that the gas is further purified, and the environment is more friendly.

3. The acid atmospheric corrosion test system of the utility model adopts a positive pressure acid-base neutralization method, a bubbling mechanism active adsorption method and the like, so that acid mist generated by the mist generator is filtered when being discharged to the outside; the PH value of the tail gas discharged is slightly larger than 7 and is alkalescent, and the specified discharge value is reached.

4. The mist making nozzle adopts the Bernoulli principle, utilizes the pressure difference generated when compressed air flows through the small hole to enable the sucked acid liquid to be sprayed into a mist shape under the impact of air flow, and utilizes the air pressure generated by spraying to press the acid waste gas into the acid waste gas purification device, so that the acid waste gas has pressure and can form a better bubbling effect after entering the acid waste gas purification device.

5. The box wall of the test box is heated by the heating device, so that the temperature in the test box reaches the required test temperature

6. After the compressed air is subjected to bubbling treatment, oil stains and impurities in the compressed air are filtered, and the blockage of the mist making nozzle is avoided.

7. The second heating device heats water in the bubble tower to preheat compressed air, and acid liquor is heated by the preheated compressed air to form acid mist with higher temperature, so that the nozzle can be prevented from being blocked due to crystal formation at the nozzle of the mist making nozzle; in addition, the concentration of the sprayed acid mist in the box body is not influenced by the heating mode.

Drawings

FIG. 1 is a schematic structural diagram of an acid atmospheric corrosion test system;

fig. 2 is a right side view of fig. 1.

Detailed Description

Since the acidic atmospheric corrosion test system includes the acidic exhaust gas purification device, the present embodiment will be described by taking the acidic atmospheric corrosion test system as an example. In daily environment, acid gas has a plurality of emission sources and forms acid mist when meeting moisture; can cause serious corrosion to contacted metal; the main guarantee of the static conductive coating corrosion resistance is that the test system tests whether the coating cracks and falls off in extremely severe environment, so that the protection mechanism is lost.

The invention is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1, the acidic atmosphere corrosion test system comprises a test box 8 and an acidic waste gas purification device; the acid waste gas purification device comprises a closed neutralization chamber 3, wherein the neutralization chamber 3 is used for containing an alkaline liquid 4; the first air inlet pipe extends into the neutralization chamber 3 and extends to a position near the bottom of the neutralization chamber 3; the upper part or the top of the neutralization chamber 3 is communicated with an air inlet of the filter chamber 5; a condensing layer with a ventilation gap is arranged in the filtering chamber 5.

An acidic waste gas outlet of the test box 8 is communicated with the first air inlet pipe, so that acidic waste gas is sent into the acidic waste gas purification device to be purified and then is discharged.

A solution storage chamber 1 is arranged in the test box 8, and a mist making nozzle 2 is arranged in the solution storage chamber 1; the fog making nozzle 2 is communicated with a gas chamber in the bubble tower 6 positioned outside the test box 8 through a pipeline; the bubble column 6 is introduced with compressed air through a second air inlet pipe 7 inserted into the bubble column and extending to a position near the bottom of the bubble column 6, so that the compressed air enters the mist making nozzle 2 after being subjected to bubbling treatment. After the compressed air is subjected to bubbling treatment, oil stains and impurities in the compressed air are filtered, and the blockage of the mist making nozzle 2 is avoided. The solution storage chamber 1, the mist making nozzle 2, the neutralizing chamber 3 and the bubble tower 6 are all made of existing products, and the detailed description is omitted.

The wall of the test chamber 8 is heated by the heating device 9 so that the temperature in the test chamber 8 reaches the desired test temperature. The bubble tower 6 is provided with a second heating device (such as a waterproof heating pipe), the second heating device heats purified water in the hot bubble tower, then the purified water passes through the second heating device to preheat the passing compressed air and remove oil stains, and the acid mist is sprayed out through the mist making nozzle 2. After the acid mist is preheated and compressed air is heated, the nozzle blockage caused by the formation of crystals at the nozzle of the mist making nozzle 2 can be avoided; moreover, the heating mode does not influence the concentration of the sprayed acid mist in the box body. The first heating means 9 may adopt various heating structures, such as a heating wire, a heating jacket, etc.

Because compressed air is continuously introduced into the test box 8, the pressure is higher than that outside the test box, and the acid waste gas outlet is arranged at the top of the test box 8 for facilitating the discharge of acid mist. The storeroom sets up in 8 bottoms of proof box simultaneously, and the sample is placed at 8 middle levels of proof box through sample frame 10, and the sample frame adopts inert material to make, and sample 11 hangs on sample frame 10 through the mode of hanging, and acid mist can carry out the condensation to the sample and adsorb on the surface in lasting manufacturing process to corrode.

In order to prevent the acid mist from dripping onto the sample after condensation, the top of the test chamber 8 is in a shape of a sharp top with a high middle and two low sides, and the angle of the sharp top is preferably more than 12 degrees.

Because of the continuous fog making, the pressure in the test box 8 is increased, the redundant acid fog flows to the neutralizing chamber 3 through the first air inlet pipe to generate bubbling, and the bubbles and the alkaline liquid generate acid-base neutralization in the rising process; after passing through the filtering chamber 5, the mixture is condensed and adsorbed and finally discharged to the outside.

In order to obtain better purification effect, an adsorption layer is further arranged in the filtering chamber 5, and a condensation layer and the adsorption layer are sequentially arranged from the air inlet to the air outlet of the filtering chamber 5. The condensation layer with the air permeable gap is filled with a metal wire mesh or metal particles. The adsorption layer is filled with porous materials. The porous material adopted by the adsorption layer comprises any one of the following materials: activated carbon, porous microsphere foam and porous ceramics.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Finally, it should be noted that the above-mentioned technical solution is only an implementation of the present invention, and it is easy for those skilled in the art to make various modifications or variations based on the principles disclosed in the present invention, not limited to the structure described in the above-mentioned embodiments of the present invention, so that the foregoing description is only preferred, but not limiting.

Claims (10)

1. An acid exhaust gas purification device, characterized in that: comprises a closed neutralizing chamber for containing alkaline liquid; the first air inlet pipe extends into the neutralization chamber and extends to a position near the bottom of the neutralization chamber; the upper part or the top of the neutralization chamber is communicated with an air inlet of the filter chamber; a condensing layer with a ventilation gap is arranged in the filtering chamber.

2. The acidic exhaust gas purification device according to claim 1, characterized in that: an adsorption layer is further arranged in the filtering chamber, and a condensation layer and the adsorption layer are sequentially arranged from the air inlet to the air outlet of the filtering chamber.

3. The acidic exhaust gas purification device according to claim 1, characterized in that: the condensation layer is formed by filling metal wire meshes or metal particles.

4. The acidic exhaust gas purification device according to claim 1, characterized in that: the adsorption layer is filled with activated carbon.

5. An acid atmospheric corrosion test system, which is characterized in that: the acidic exhaust gas purification device comprises a test box and the acidic exhaust gas purification device as claimed in any one of claims 1-4, wherein an acidic exhaust gas outlet of the test box is communicated with the first air inlet pipe, so that acidic exhaust gas is fed into the acidic exhaust gas purification device to be purified and then is discharged.

6. An acid atmospheric corrosion test system as claimed in claim 5, wherein: a solution storage chamber is arranged in the test box, and a mist making nozzle is arranged in the solution storage chamber; the mist making nozzle is communicated with an air chamber in the bubble column through a pipeline; compressed air is introduced into the bubbling tower through a second air inlet pipe which is inserted into the bubbling tower and extends to the position near the bottom of the bubbling tower, so that the compressed air enters the mist making nozzle after being subjected to bubbling treatment.

7. An acidic atmospheric corrosion test system according to claim 6, wherein: the solution storage chamber is arranged at the bottom of the test box, the sample frame is arranged at the middle layer of the test box, and the acid waste gas outlet is arranged at the top of the test box.

8. An acidic atmospheric corrosion test system according to claim 6, wherein: the box wall of the test box is heated through the first heating device, so that the acid mist formed in the test box through the mist making nozzle obtains the heat radiation of the box wall, and the temperature required by the test box is controlled.

9. An acidic atmospheric corrosion test system according to claim 6, wherein: and a second heating device for heating the liquid in the bubble tower is arranged in the bubble tower.

10. An acidic atmospheric corrosion test system according to claim 7, wherein: the top of the test box is in a shape of a sharp top with a high middle and two low sides.

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