A device for treating the blockage of the discharge pipe of a reactor

Abstract

The present invention discloses a device for treating blockage of a discharge pipe of a reaction kettle, which comprises a reaction kettle and a discharging valve arranged at the bottom of the reaction kettle. The discharging valve is connected to the discharge pipe through a flange. A first aluminum layer is tightly wrapped on the outer surface of the discharge pipe, and a second aluminum layer is arranged on the inner wall of the outlet end of the discharge pipe. The second aluminum layer is fixed on the inner wall of the outlet end of the discharge pipe by bolts. The advantages are as follows: The present invention tightly wraps an aluminum layer on the outer surface of the discharge pipe, avoiding the formation of zinc slag and solving the problem of pipeline blockage caused by raw materials accumulating on the zinc slag; moreover, aluminum layers are arranged on the outer wall of the discharge pipe and the inner wall of the outlet end of the discharge pipe, which is convenient for installation and simple in operation; only the aluminum foil layer on the inner wall of the outlet end of the discharge pipe needs to be replaced regularly, which is convenient for replacement, time-saving and labor-saving; the aluminum foil is low in price, reducing the cost of replacing the pipeline and saving the pipeline maintenance cost.

Description

Technical Field:

[0001] The present invention relates to the technical field of pipeline dredging, and particularly relates to a device for treating blockage of a discharge pipe of a reaction kettle. Background Art:

[0002] Ethyl ferrocene is used in the synthesis of composite solid propellants, combustion rate catalysts and other ferrocene derivatives, and has good combustion rate catalytic and plasticizing properties. As a civilian liquid fuel additive, it can improve the fuel combustion efficiency. The preparation principle of ethyl ferrocene is to use ferrocene as a raw material, and in the presence of a dispersant and a catalyst, an acylation reaction occurs with an acylating agent to obtain acetyl ferrocene, and then the Clemmensen reaction is used to reduce acetyl ferrocene to ethyl ferrocene, that is, acetyl ferrocene undergoes a reduction reaction with a reducing agent zinc amalgam under the catalysis of hydrochloric acid to obtain ethyl ferrocene.

[0003] During the production of ethyl ferrocene, zinc amalgam is added to the reaction kettle in the form of a solid-liquid mixture. Zinc powder, mercuric chloride in solid state and hydrochloric acid in liquid state are used to prepare zinc amalgam. In the reaction kettle, zinc powder reacts with mercuric ions, and zinc reduces divalent mercury to metallic mercury. Metallic mercury forms zinc amalgam on the surface of zinc, and at the same time, zinc ions are also generated. Since the added zinc powder is in excess, the zinc chloride solution formed in the discharge pipe is a saturated solution, so the concentration of zinc ions is relatively high. When high-concentration zinc ions contact the iron in the discharge pipe of the reaction kettle, an electron transfer phenomenon will occur, resulting in local excessive charge on the inner wall of the discharge pipe, thereby attracting zinc powder deposition to form zinc slag. The zinc slag adheres to the inside of the discharge pipe of the reaction kettle, and the product in the discharge pipe is relatively viscous, which will accumulate on the zinc slag and cause the pipeline to be blocked. At present, the method of manually dredging the pipeline is adopted, which takes a long time to clean and consumes a lot of manpower, seriously affecting the factory efficiency. Summary of the Invention:

[0004] The purpose of the present invention is to provide a device for treating blockage of a discharge pipe of a reaction kettle, which solves the problems that zinc slag adheres to the inside of the discharge pipe of the reaction kettle, materials accumulate on the zinc slag to block the pipeline, and it is time-consuming and laborious to dredge the pipeline.

[0005] The present invention is implemented by the following technical solution: A device for treating blockage of a discharge pipe of a reaction kettle includes a reaction kettle and a discharge valve provided at the bottom of the reaction kettle. The discharge valve is connected to the discharge pipe through a flange. A first aluminum layer is tightly wrapped on the outer surface of the discharge pipe, and a second aluminum layer is provided on the inner wall of the outlet end of the discharge pipe. The second aluminum layer is fixed on the inner wall of the outlet end of the discharge pipe by bolts.

[0006] Preferably, the first aluminum layer is tightly wrapped on the outer wall of the discharge pipe by cotton thread or aluminum wire.

[0007] Preferably, the first aluminum metal layer is a first aluminum foil layer, the second aluminum metal layer is a second aluminum foil layer, and the number of wrapped layers of both the first aluminum foil layer and the second aluminum foil layer is 2 - 4 layers.

[0008] Advantages of the present invention: By forming an aluminum - zinc primary battery with the closely - fitting aluminum metal layers provided on the inner and outer surfaces of the discharge pipe of the reactor and the zinc ions inside, the zinc ions are reduced to zinc powder, avoiding local excessive charge on the inner wall of the discharge pipe, which may cause zinc powder deposition to form zinc slag, and solving the problem of pipeline blockage caused by excessive zinc powder and zinc amalgam accumulating on the zinc slag; The installation of aluminum metal layers on the outer wall of the discharge pipe and the inner wall of the outlet end of the discharge pipe is convenient and the operation is simple; Only the second aluminum metal layer on the inner wall of the outlet end of the discharge pipe needs to be replaced regularly, and the replacement process is simple, saving time and effort; The aluminum foil is inexpensive, reducing the cost of replacing the pipeline and saving the cost of pipeline maintenance. Brief Description of the Drawings:

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0010] Figure 1 It is a schematic structural diagram of a device for treating blockage of the discharge pipe of a reactor;

[0011] Figure 2 It is a partial enlarged view of position A of the device for treating blockage of the discharge pipe of a reactor;

[0012] Reactor 1, discharge valve 2, flange 3, discharge pipe 4, first aluminum foil layer 5, second aluminum foil layer 6 Specific Embodiments:

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0014] Such as Figure 1As shown in the figure, the present invention provides a device for dealing with the blockage of the discharge pipe of a reaction kettle, which includes a reaction kettle 1 and a discharge valve 2 arranged at the bottom of the reaction kettle 1. The discharge valve 2 is connected to the discharge pipe 4 through a flange 3. On the outer surface of the discharge pipe 4, 2-4 layers of first aluminum foil layers 5 are tightly wrapped, and cotton thread or aluminum wire is used to fix the first aluminum foil layers 5 on the outer wall of the discharge pipe 4 to prevent air from entering the gap between the discharge pipe 4 and the inner surface of the first aluminum foil layer 5, resulting in the oxidation of the inner surface of the first aluminum foil layer 5; on the inner wall of the outlet end of the discharge pipe 4, 2-4 layers of second aluminum foil layers 6 are arranged, and the second aluminum foil layers 6 are fixed on the inner wall of the outlet end of the discharge pipe 4 through bolt perforations. Before using the aluminum foil, the inner surface of the aluminum foil is polished with sandpaper to remove the aluminum oxide formed on the inner surface of the aluminum foil.

[0015] Zinc amalgam is prepared by mixing and stirring zinc powder or zinc granules, mercuric chloride, concentrated hydrochloric acid and water; acyl ferrocene and zinc amalgam are added to the feed inlet of the reaction kettle 1 for the Clemmensen reaction to reduce acetyl ferrocene to ethyl ferrocene. When the Clemmensen reaction proceeds sufficiently, zinc chloride solution will be generated in the reaction kettle 1. Open the discharge valve, and the zinc chloride solution in the discharge pipe 4 contacts the second aluminum foil layer 6 fixed on the inner wall of the outlet end of the discharge pipe 4. The second aluminum foil layer 6 fixed on the inner wall of the outlet end of the discharge pipe 4 and the first aluminum foil layer 5 wrapped on the outer surface of the discharge pipe 4 are connected through the pipe wall steel to form a metal aluminum electrode. The metal aluminum electrode forms an aluminum-zinc primary battery with zinc ions in the discharge pipe 4 through the steel. This primary battery requires mercury or alkyl polyepoxy resin ethanol sulfide as a stabilizer, and in this reaction, the raw materials contain mercury, which can inhibit the reduction reaction of protons, thus forming an aluminum-zinc primary battery. The principle is as follows: In the primary battery composed of aluminum, zinc, and zinc chloride solution, aluminum is the negative electrode. At the negative electrode, aluminum loses electrons and undergoes an oxidation reaction to generate aluminum ions and enter the solution, resulting in the gradual dissolution of aluminum. The electrode reaction formula is Al - 3e - →Al 3+ , zinc is the positive electrode. At the positive electrode, zinc ions gain electrons and undergo a reduction reaction to generate zinc. The electrode reaction formula is Zn 2+ +2e - →Zn. The ionic equation of the primary battery reaction is 2Al + 3Zn 2+ =2Al 3+ +3Zn; Through this reaction, zinc ions are reduced to zinc, avoiding the contact between high-concentration zinc ions and iron in the reaction kettle discharge pipe, reducing zinc powder deposition, reducing the formation of zinc slag, and preventing the blockage of the discharge pipe 4 caused by the aggregation of excessive zinc powder and zinc amalgam on the zinc slag; compared with setting aluminum foil layers in the discharge pipe 4, setting aluminum foil layers on the outer wall of the discharge pipe 4 and the inner wall of the outlet end of the discharge pipe 4 is more convenient to install and simpler to operate; moreover, after the aluminum foil layer is corroded, only the second aluminum foil layer 6 needs to be removed regularly and the second aluminum foil layer 6 is replaced, which is time-saving and labor-saving; at the same time, the aluminum foil is inexpensive, which can reduce the cost of replacing the pipeline and save the pipeline maintenance cost, and the economy is significantly improved.

[0016] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for treating the blockage of the discharge pipe of a reactor, comprising a reactor and a discharge valve provided at the bottom of the reactor. The discharge valve is connected to the discharge pipe through a flange. The pipe wall of the discharge pipe is made of steel. It is characterized in that a first aluminum layer is tightly wrapped on the outer surface of the discharge pipe, and a second aluminum layer is provided on the inner wall of the outlet end of the discharge pipe. The second aluminum layer is fixed on the inner wall of the outlet end of the discharge pipe by bolts; through the first aluminum layer and the second aluminum layer tightly attached to the inner and outer surfaces of the discharge pipe, an aluminum-zinc primary battery is formed with the zinc ions inside the discharge pipe.

2. The device for treating the blockage of the discharge pipe of a reactor according to claim 1, It is characterized in that the first aluminum layer is tightly wrapped on the outer wall of the discharge pipe by cotton thread or aluminum wire.

3. The device for treating the blockage of the discharge pipe of a reactor according to claim 2, It is characterized in that the first aluminum layer is a first aluminum foil layer, the second aluminum layer is a second aluminum foil layer, and the number of wrapping layers of both the first aluminum foil layer and the second aluminum foil layer is 2-4 layers.

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