Closed Pickling Plant for Aluminum Oxidation

Abstract

The invention discloses a closed pickling device for aluminum oxide and belongs to environment-friendly facilities. The closed pickling device comprises a pickling cabinet body consisting of a first cabinet wall, a second cabinet wall, a third cabinet wall, a fourth cabinet wall, a bottom wall and a cabinet cover, a pickling tank, a lifting half door, a cover plate, a spraying and cleaning mechanism and a winch shaft, a winch shaft driving mechanism, wherein the upper part of the pickling tank is open, and the lower side part of the pickling tank is provided with a pickling solution discharging joint; the lifting half door is arranged on the upper part of the first cabinet door; the cover is assembled on the third or fourth cabinet wall; the spraying and cleaning mechanism is communicated with the cabinet cavity; one end of the winch shaft is supported on the third cabinet wall, and the other end of the winch shaft is supported on the fourth cabinet wall; a winch is fixed in the middle of the winch shaft; lifting hooks are fixed at one end and the other end of the twisted rope on the winch; the winch shaft driving mechanism is arranged on the third cabinet wall or the fourth cabinet wall and is connected with the winch shaft; pollution discharge joints are formed on the lower parts of the first cabinet wall, the second cabinet wall, the third cabinet wall or the fourth cabinet wall; an exhaust joint is formed on the top of the cabinet cover; and the exhaust joint is connected with a waste gas treatment device. The closed pickling device has the advantages that pickling is performed in the closed state, and the device is high in operating efficiency, low in labor intensity and high in safety.

Description

technical field [0001] The invention belongs to the technical field of environmental protection facilities, and in particular relates to a closed pickling device for aluminum oxidation, which is used for pickling aluminum and / or aluminum alloy components in a closed state. Background technique [0002] Aluminum and aluminum alloy products are widely used due to their lightness, corrosion resistance, wear resistance, aesthetics and cheapness, and are generally favored by people. As known in the industry, in the production process of aluminum and aluminum alloy products, surface treatment is required, and surface oxidation is required before surface treatment. Surface oxidation is usually pickled with strong acids such as phosphoric acid, sulfuric acid and / or nitric acid, so as to Remove the surface oxide layer (oxide film). [0003] In the prior art, the way of pickling aluminum and aluminum alloy products usually adopts open pickling. The so-called open pickling is to first...

AI Technical Summary

Problems solved by technology

[0004] There are at least the following disadvantages in the above-mentioned pickling method: one, because the pickling tank is open or claims open type, and because a large amount of nitrogen dioxide (NO2) will be produced in the whole pickling process 2 ) and sulfur dioxide (SO 2 ) and other harmful gases, these harmful gases diffuse in the environment of the job site, thus affecting the health of workers; second, because the pickling tank is open, it is difficult to guarantee the safety of the operation; third, due to the acid pickling tank The temperature of the lotion is usually around 65-80°C, so the workers are continuously attacked by volatile acids, acid mist and exhaust gas in one work shift. The labor intensity of the workers is high and the physical and mental exhaustion is serious; When acid, acid mist and exhaust gas enter the external environment, they will pollute the atmosphere, etc.

[0005] The current solution is to install a suction hood above the open pickling tank, as seen in the catering industry, but practice has proved that it can only lead part of the toxic and harmful gases away from the pickling operation site, especially, If the poisonous and harmful gas drawn out by the suction hood is directly discharged to the outside without effective treatment, it will undoubtedly produce a superficial treatment rather than a permanent cure. The so-called superficial treatment is helpful to improve the pickling operation site to a certain extent. internal environment, while the so-called non-curative means that it is easy to damage the external environment

In addition, since the suction hood is equipped with a high-power fan suction, a large amount of air is sucked in, which makes it difficult for the exhaust gas treatment in the subsequent channel, and at the same time significantly increases the cost of exhaust gas treatment

[0006] China Invention Patent Authorization Announcement No. CN100570007C recommends a "closed circulation pickling tank" (proposed by the applicant). This patent solution can objectively reflect the technical effect known in the last paragraph on page 2 of its specification, but because the patent solution is for It is designed for the pickling of stainless steel parts with relatively long pickling time (the second paragraph on page 4 of the manual), so for pickling devices of aluminum and aluminum alloys that only need a few seconds to tens of seconds of pickling time There is no technical significance for reference, because for aluminum and aluminum alloy products with specific geometric shapes but relatively small overall volume, it is usually desired to rinse immediately after the pickling step is completed, and this CN100570007C does not have such a revelation

Also, the utility model patent authorization announcement number CN202643849U provides a "pickling tank". Although this patent solution has the achievements summarized in column 0009 of its specification, it also has no enlightening effect on the closed pickling device for aluminum oxidation.

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