A device for treating solid waste residues in the production of electrolytic magnesium

Abstract

The present application relates to the technical field of electrolytic magnesium, and particularly relates to a solid waste residue treatment device in electrolytic magnesium production. A feed inlet (3) is a closable hopper, and the feed inlet (3) leads to the inside of a basic treatment container (1); the lower part of the basic treatment container (1) contains a bottom gate (2); a comprehensive flue gas reaction auxiliary system (5) is arranged on the basic treatment container (1); a collection main plate (504) is attached to a flue gas pipeline (6); the upper part of the basic treatment container (1) contains a waste gas passage (4) for collecting ammonia gas; the flue gas pipeline (6) leads to a flue gas passage (7); and the opening on one side of a comprehensive pipe (8) is a scrubber contact opening (9). The present application initiatively uses the existing flue gas in front of the scrubber for purifying flue gas to catalyze the reaction, make the ammonia gas unstable, rapidly release, and then react with the acid gas and the ammonia gas. The automatic neutralization reduces the environmental protection cost and avoids the generation of ammonia gas in the later period.

Description

Technical Field

[0001] This invention relates to the field of electrolytic magnesium technology, and in particular to a device for treating solid waste residue in electrolytic magnesium production. Background Technology

[0002] Magnesium electrolytic cell slag, magnesium molten salt furnace slag, and magnesium continuous refining furnace slag are the three main sources of solid waste in current electrolytic magnesium production.

[0003] When magnesium oxide is wetted by molten salt, it deposits at the bottom of the furnace or electrolytic cell, forming slag that adheres to the walls. Over time, this can adversely affect the normal operation of the workpiece.

[0004] Therefore, solid waste must be cleaned up regularly to avoid affecting normal production.

[0005] The main components of solid waste slag produced in electrolytic magnesium production are MgO, MgCl2, CaCl2, NaCl, KCl, Mg, and Mg2N3. When this slag is piled up and exposed to air, especially humid air, it will produce flammable and explosive hydrogen gas and toxic ammonia gas. The main chemical reaction equation is as follows: Mg2N3 + H2O = Mg(OH)2 + 2NH3↑. If the concentration of hydrogen and ammonia accumulates to a sufficiently high level, it can cause an explosion or environmental pollution. Therefore, the treatment of solid waste slag is necessary.

[0006] On June 27, 2024, a search was conducted in the China Patent Publication Database using "electrolytic magnesium and solid and waste residue and ammonia and neutralization" as the abstract keywords and the option to allow synonym expansion was selected. No relevant literature was found.

[0007] On June 27, 2024, an abstract search was conducted on CNKI (China National Knowledge Infrastructure) using "electrolytic magnesium and solid and waste residue and ammonia and neutralization" as abstract keywords, but no relevant literature was found.

[0008] CN112077118A discloses a treatment process for solid waste residue in electrolytic magnesium production, which provides a complex method for solid waste treatment. This method requires a large amount of equipment for post-processing, which is too costly to some extent, resulting in a serious economic burden for enterprises.

[0009] It is completely different from the concept of this patent.

[0010] Therefore, the shortcomings of the existing technology are: the cost is too high, the required equipment is too large, and the control of ammonia is too complicated. Summary of the Invention

[0011] Purpose of the invention: To provide a more effective device for treating solid waste residue in the production of electrolytic magnesium, the specific purpose of which is described in the several substantial technical effects in the detailed implementation section.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A device for treating solid waste residue in electrolytic magnesium production, characterized in that,

[0014] The processing device includes a basic processing container 1, and a feed inlet 3 is arranged above the basic processing container 1. The feed inlet 3 is a closable hopper and leads to the interior of the basic processing container 1.

[0015] The bottom of the basic processing container 1 includes a bottom gate 2;

[0016] An integrated flue gas reaction auxiliary system 5 is arranged on the basic treatment container 1;

[0017] The integrated flue gas reaction auxiliary system 5 includes multiple sets of dispersion heating tubes 503 passing through the basic treatment container 1. The two sides of the dispersion heating tubes 503 correspond to the dispersion main board 502 and the collection main board 504, respectively. The dispersion main board 502 and the collection main board 504 are each hollow cavities.

[0018] The mainboard 502 is connected to the flue gas inlet 501;

[0019] Collect the motherboard 504 and connect it to the flue gas duct 6;

[0020] The basic treatment container 1 includes an exhaust gas channel 4 for collecting ammonia gas.

[0021] Flue gas duct 6 leads to flue gas passage 7;

[0022] The flue gas passage 7 and the exhaust gas passage 4 are connected by a combined pipe 8;

[0023] The opening on one side of the integrated pipe 8 is the contact port 9 of the washing tower.

[0024] A further technical solution of the present invention is that a water spray nozzle is arranged in the basic treatment container 1.

[0025] A further technical solution of the present invention is that a temperature sensor is arranged in the basic processing container 1.

[0026] A further technical solution of the present invention is that a conveyor belt is included below the bottom gate 2.

[0027] A further technical solution of the present invention is that the feed inlet 3 can hold solid waste residue from the electrolytic magnesium production process. The main components of the solid waste residue are: MgO, MgCl2, CaCl2, NaCl, KCl, Mg and Mg2N3.

[0028] Mg2N3 + H2O = Mg(OH)2 + 2NH3↑; ammonia and sulfur oxides or nitrogen oxides in flue gas inlet 501 are further neutralized with water by acid-base reaction.

[0029] A further technical solution of the present invention is that the integrated flue gas reaction auxiliary system 5 can heat the solid waste residue and assist in the release of ammonia.

[0030] A further technical solution of the present invention is that acid-base neutralization takes place in the main reaction in a washing tower.

[0031] A further technical solution of the present invention is that the solid waste residue and silt below the bottom gate 2 are mixed together to make building bricks.

[0032] The present invention, employing the above technical solution, offers the following advantages over existing technologies: Compared to the existing technology, "CN112077118A discloses a complex solid waste treatment method for electrolytic magnesium production, which requires extensive post-processing equipment, resulting in excessively high costs and a significant economic burden on enterprises. Therefore, the shortcomings of existing technologies are: excessively high costs, excessive equipment requirements, and overly complex ammonia control." This patent innovatively utilizes the pre-filtered flue gas from existing flue gas purification scrubbing towers to catalyze the reaction, making ammonia unstable and rapidly released. Subsequently, acidic gases react with ammonia, automatically neutralizing it, reducing environmental costs, and preventing the later generation of ammonia. Attached Figure Description

[0033] To further illustrate the present invention, the following description is provided in conjunction with the accompanying drawings:

[0034] Figure 1 To invent an overall layout diagram;

[0035] Figure 2 This is a partial structural diagram of the invention;

[0036] Figure 3 This is a partial structural diagram of the invention;

[0037] The components are: 1. Basic treatment container; 2. Bottom gate; 3. Feed inlet; 4. Waste gas passage; 5. Integrated flue gas reaction auxiliary system; 6. Flue gas pipeline; 7. Flue gas passage; 8. Integrated pipe; 9. Scrubber contact port; 501. Flue gas inlet; 502. Dispersion main board; 503. Dispersion heating tube; 504. Collection main board. Detailed Implementation

[0038] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] This patent provides multiple parallel solutions; the different descriptions represent improved solutions or parallel solutions based on the basic solution. Each solution has its own unique characteristics. Furthermore, the technical features involved in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other. Fixing methods not described herein can be any type of fixing, such as threaded fixing, bolt fixing, or adhesive bonding.

[0041] Example 1: Referring to all the accompanying drawings; a device for treating solid waste residue in electrolytic magnesium production, characterized in that,

[0042] The processing device includes a basic processing container 1, and a feed inlet 3 is arranged above the basic processing container 1. The feed inlet 3 is a closable hopper and leads to the interior of the basic processing container 1.

[0043] The bottom of the basic processing container 1 includes a bottom gate 2;

[0044] An integrated flue gas reaction auxiliary system 5 is arranged on the basic treatment container 1;

[0045] The integrated flue gas reaction auxiliary system 5 includes multiple sets of dispersion heating tubes 503 passing through the basic treatment container 1. The two sides of the dispersion heating tubes 503 correspond to the dispersion main board 502 and the collection main board 504, respectively. The dispersion main board 502 and the collection main board 504 are each hollow cavities.

[0046] The mainboard 502 is connected to the flue gas inlet 501;

[0047] Collect the motherboard 504 and connect it to the flue gas duct 6;

[0048] The basic treatment container 1 includes an exhaust gas channel 4 for collecting ammonia gas.

[0049] Flue gas duct 6 leads to flue gas passage 7;

[0050] The flue gas passage 7 and the exhaust gas passage 4 are connected by a combined pipe 8;

[0051] The opening on one side of the integrated pipe 8 is the contact port 9 of the washing tower.

[0052] The substantive technical effects and implementation process of the technical solution presented herein, i.e., its basic functions, are as follows: Compared to the existing technology "CN112077118A discloses a complex solid waste treatment method for solid waste residue in electrolytic magnesium production, which requires a large amount of equipment for post-processing, resulting in excessively high costs and a severe economic burden on enterprises. Therefore, the shortcomings of the existing technology are: excessively high costs, excessive equipment requirements, and overly complex control of ammonia gas.", this patent innovatively utilizes the flue gas pre-filtered by the existing flue gas purification scrubbing tower to catalyze the reaction, making the ammonia gas unstable and rapidly released. Subsequently, the acidic gas reacts with the ammonia gas, automatically neutralizing it, reducing environmental protection costs, and avoiding the later generation of ammonia gas.

[0053] Example 2: As a further improvement, parallel, or optional independent solution, a water spray nozzle is arranged in the basic treatment container 1. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: the water spray nozzle sprays water appropriately to allow the reaction to proceed in the forward direction and the ammonia gas to be released as soon as possible.

[0054] Example 3: As a further improvement, parallel, or optional independent solution, a temperature sensor is arranged in the basic processing container 1. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: temperature control.

[0055] Example 4: As a further improvement, parallel, or optional independent solution, a conveyor belt is included below the bottom gate 2. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: automatic unloading.

[0056] Example 5: As a further improvement, parallel, or optional independent solution, the feed inlet 3 can hold solid waste residue from the electrolytic magnesium production process. The main components of the solid waste residue are: MgO, MgCl2, CaCl2, NaCl, KCl, Mg, and Mg2N3.

[0057] Mg2N3 + H2O = Mg(OH)2 + 2NH3↑; ammonia and sulfur oxides or nitrogen oxides in flue gas inlet 501 are further neutralized with water by acid-base reaction.

[0058] Example 6: As a further improvement, parallel, or optional independent solution, the integrated flue gas reaction auxiliary system 5 can heat the solid waste residue to assist in the release of ammonia.

[0059] Example 7: As a further improvement, parallel, or alternative independent option, acid-base neutralization takes place in a scrubbing tower as the main reaction.

[0060] Example 8: As a further improvement, parallel, or alternative independent solution, the solid waste and sludge below the bottom gate 2 are mixed together to make building bricks.

[0061] Innovatively, each of the above effects exists independently, yet a single structure can be used to combine the results.

[0062] It should be noted that the multiple solutions provided in this patent include their own basic solutions, which are independent of each other and do not restrict each other. However, they can also be combined with each other without conflict to achieve multiple effects.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. A device for treating solid waste residue in electrolytic magnesium production, characterized in that, The processing device includes a basic processing container (1), and a feed inlet (3) is arranged above the basic processing container (1). The feed inlet (3) is a closable hopper and leads to the interior of the basic processing container (1). The bottom of the basic processing container (1) includes a bottom gate (2); An integrated flue gas reaction auxiliary system (5) is arranged on the basic treatment container (1); The integrated flue gas reaction auxiliary system (5) includes multiple sets of dispersed heating tubes (503) passing through the basic treatment container (1). The two sides of the dispersed heating tubes (503) correspond to the dispersed main board (502) and the collecting main board (504) respectively. The dispersed main board (502) and the collecting main board (504) are each hollow cavities. The main board (502) is connected to the flue gas inlet (501); The main board (504) is connected to the flue gas duct (6); The basic treatment container (1) includes an exhaust gas channel (4) for collecting ammonia. The flue gas duct (6) leads to the flue gas passage (7); The flue gas passage (7) and the exhaust gas passage (4) are connected by a combined pipe (8); The opening on one side of the integrated pipe (8) is the contact port (9) of the washing tower; The sulfur oxides or nitrogen oxides in the ammonia and flue gas inlet (501) are further neutralized with water by acid-base neutralization.

2. The device for treating solid waste residue in electrolytic magnesium production as described in claim 1, characterized in that, Water spray nozzles are arranged in the basic treatment container (1).

3. The device for treating solid waste residue in electrolytic magnesium production as described in claim 1, characterized in that, Temperature sensors are arranged in the basic processing container (1).

4. The device for treating solid waste residue in electrolytic magnesium production as described in claim 1, characterized in that, The bottom gate (2) contains a conveyor belt.

5. The device for treating solid waste residue in electrolytic magnesium production as described in claim 1, characterized in that, The feed inlet (3) can hold solid waste residue from the production of electrolytic magnesium. The main components of the solid waste residue are: MgO, MgCl2, CaCl2, NaCl, KCl, Mg and Mg2N3.

6. The device for treating solid waste residue in electrolytic magnesium production as described in claim 1, characterized in that, The integrated flue gas reaction auxiliary system (5) can heat the solid waste residue and assist in the release of ammonia.

7. The device for treating solid waste residue in electrolytic magnesium production as described in claim 6, characterized in that, The acid-base neutralization reaction takes place in the washing tower.

8. The device for treating solid waste residue in electrolytic magnesium production as described in claim 1, characterized in that, The solid waste and silt below the bottom gate (2) are mixed together to make building bricks.

Images