A system for processing silicone waste bodies

Abstract

The utility model discloses a kind of processing systems of organic silicon waste contact body, it includes waste contact body conveying pipeline, dilute hydrochloric acid preparation jar, slag slurry hydrolysis tank, first filter press, ball mill, stirring tank, soaking jar, sodium hypochlorite storage tank, second filter press, sponge copper jar and iron powder bin;The discharge end of waste contact body conveying pipeline is communicated with the feed inlet of slag slurry hydrolysis tank, and the liquid outlet of dilute hydrochloric acid preparation jar is communicated with the liquid inlet of slag slurry hydrolysis tank;The liquid outlet of slag slurry hydrolysis tank is communicated with the liquid inlet of first filter press, and the filter block outlet of first filter press is communicated with the feed inlet of ball mill, and the discharge outlet of ball mill is communicated with the feed inlet of stirring tank, and the liquid outlet of dilute hydrochloric acid conveying pipeline is communicated with the liquid inlet of stirring tank, and the liquid outlet of stirring tank is communicated with the liquid inlet of soaking jar, and the liquid outlet of sodium hypochlorite storage tank is communicated with the liquid inlet of soaking jar. Advantageous effects: the utility model simple connection, easy to realize, realize the effective utilization of sodium hypochlorite, reduce the production cost of enterprise, and improve the economic benefit of enterprise, avoid the security risk and pollution to environment simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of organosilicon waste contact technology, and in particular to a system for treating organosilicon waste contact. Background Technology

[0002] Organosilicon manufacturers utilize silicon powder and chloromethane gas in a fluidized bed reactor in the presence of a copper catalyst to produce methylchlorosilane mixed monomers. To ensure the high efficiency of the catalytic system, new copper-based catalysts must be continuously added during the reaction cycle, and copper powder with reduced surface activity is continuously collected through a cyclone separation system. This solid industrial waste is referred to as organosilicon waste catalyst. Due to its small particle size and the high reactivity of the copper powder, the waste catalyst can oxidize or even burn when exposed to air. Therefore, improper handling can cause environmental pollution and pose safety hazards.

[0003] Furthermore, sodium hypochlorite is produced as a byproduct during the production of silica. Due to its low effective chlorine concentration (between 3% and 4%), it has low value for external sale and may even require direct disposal at a cost, resulting in significant expenses and increased production costs for the company, without generating any effective value. Utility Model Content

[0004] The main purpose of this utility model is to provide a treatment system for waste organosilicon catalysts, which realizes the effective utilization of sodium hypochlorite, reduces the production cost of enterprises, improves the economic benefits of enterprises, and avoids safety hazards and environmental pollution.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waste silicone catalyst treatment system, comprising a waste catalyst conveying pipeline, a dilute hydrochloric acid preparation tank, a slurry hydrolysis tank, a first filter press, a ball mill, a stirring tank, a soaking tank, a sodium hypochlorite storage tank, a second filter press, a sponge copper tank, and an iron powder silo; the discharge end of the waste catalyst conveying pipeline is connected to the inlet of the slurry hydrolysis tank, the outlet of the dilute hydrochloric acid preparation tank is connected to the inlet of the slurry hydrolysis tank; the outlet of the slurry hydrolysis tank is connected to the inlet of the first filter press, and the first filter press... The filter block outlet of the filter press is connected to the feed inlet of the ball mill, the discharge outlet of the ball mill is connected to the feed inlet of the mixing tank, the liquid outlet of the dilute hydrochloric acid conveying pipeline is connected to the liquid inlet of the mixing tank, the liquid outlet of the mixing tank is connected to the liquid inlet of the soaking tank, the liquid outlet of the sodium hypochlorite storage tank is connected to the liquid inlet of the soaking tank, the liquid outlet of the soaking tank is connected to the liquid inlet of the second filter press, the filtrate outlet of the second filter press is connected to the liquid inlet of the sponge copper tank, and the discharge outlet of the iron powder silo is connected to the feed inlet of the sponge copper tank.

[0006] Furthermore, the filtrate outlet of the first filter press is connected to the inlet of the dilute hydrochloric acid preparation tank.

[0007] Furthermore, it also includes a nitrogen delivery pipeline, an acid washing tower, and an alkaline washing tower; the outlet of the nitrogen delivery pipeline is connected to the inlet of the soaking tank, the outlet of the soaking tank is connected to the inlet of the acid washing tower, and the outlet of the acid washing tower is connected to the inlet of the alkaline washing tower.

[0008] Furthermore, agitators are provided in the slurry hydrolysis tank, the stirring tank, the soaking tank, and the sponge copper tank.

[0009] This invention has the following advantages: The connection is simple and easy to implement. First, dilute hydrochloric acid is used to fully hydrolyze the iron, zinc, and aluminum metal impurities in the waste catalyst to form an ionic solution. Then, the solution is filtered through a first filter press. The filter block is then thoroughly ground in a ball mill to remove the organic carbon coating on the copper surface. Afterward, the solution is mixed with dilute hydrochloric acid in a stirring tank to make the slurry acidic. It is then sent to a soaking tank and mixed with a byproduct sodium hypochlorite solution. Sodium hypochlorite reacts with dilute hydrochloric acid to generate hypochlorous acid, which acts as an oxidant for copper extraction from the waste catalyst, oxidizing elemental copper into a copper ion solution. The solution is then filtered through a second filter press, and the filtrate reacts with iron powder to obtain sponge copper, which is sold as a product. This invention also achieves effective utilization of sodium hypochlorite, reduces production costs, improves economic efficiency, and avoids safety hazards and environmental pollution. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of a waste silicone catalyst treatment system according to the present invention.

[0012] In the diagram: 1. Waste catalyst conveying pipeline; 2. Dilute hydrochloric acid preparation tank; 3. Slurry hydrolysis tank; 4. First filter press; 5. Ball mill; 6. Mixing tank; 7. Immersion tank; 8. Sodium hypochlorite storage tank; 9. Second filter press; 10. Sponge copper tank; 11. Iron powder silo; 12. Nitrogen conveying pipeline; 13. Pickling tower; 14. Alkali washing tower; 15. Dilute hydrochloric acid conveying pipeline; 16. Agitator. Detailed Implementation

[0013] The following is in conjunction with the appendix Figure 1The principles and features of this utility model are described, making the technical means, creative features, and achieved objectives of this utility model easy to understand, and further elaborating on this utility model.

[0014] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] like Figure 1 As shown, the technical solution adopted by this utility model is as follows: a treatment system for waste organosilicon catalysts, comprising a waste catalyst conveying pipeline 1, a dilute hydrochloric acid preparation tank 2, a slurry hydrolysis tank 3, a first filter press 4, a ball mill 5, a stirring tank 6, a soaking tank 7, a sodium hypochlorite storage tank 8, a second filter press 9, a sponge copper tank 10, an iron powder silo 11, a nitrogen conveying pipeline 12, an acid washing tower 13, and an alkaline washing tower 14; the discharge end of the waste catalyst conveying pipeline 1 is connected to the inlet of the slurry hydrolysis tank 3, and the outlet of the dilute hydrochloric acid preparation tank 2 is connected to the inlet of the slurry hydrolysis tank 3; the outlet of the slurry hydrolysis tank 3 is connected to the inlet of the first filter press 4, and the second filter press 9, a second filter press 10, a third filter press 11, a fourth filter press 12, a fifth filter press 13, a sixth filter press 14, and a seventh filter press 15. The filtrate outlet of the first filter press 4 is connected to the inlet of the dilute hydrochloric acid preparation tank 2. The filter block outlet of the first filter press 4 is connected to the inlet of the ball mill 5. The outlet of the ball mill 5 is connected to the inlet of the mixing tank 6. The outlet of the dilute hydrochloric acid conveying pipeline 15 is connected to the inlet of the mixing tank 6. The outlet of the mixing tank 6 is connected to the inlet of the soaking tank 7. The outlet of the sodium hypochlorite storage tank 8 is connected to the inlet of the soaking tank 7. The outlet of the soaking tank 7 is connected to the inlet of the second filter press 9. The filtrate outlet of the second filter press 9 is connected to the inlet of the sponge copper tank 10. The outlet of the iron powder silo 11 is connected to the inlet of the sponge copper tank 10.

[0017] The outlet of the nitrogen delivery pipeline 12 is connected to the inlet of the soaking tank 7, the outlet of the soaking tank 7 is connected to the inlet of the pickling tower 13, and the outlet of the pickling tower 13 is connected to the inlet of the alkaline washing tower 14.

[0018] Agitators 16 are installed in the slurry hydrolysis tank 3, stirring tank 6, soaking tank 7 and sponge copper tank 10.

[0019] Working principle: First, 7-9% dilute hydrochloric acid and waste catalyst are added to the slurry hydrolysis tank and thoroughly stirred for hydrolysis. The dilute hydrochloric acid fully hydrolyzes the iron, zinc, and aluminum metal impurities in the waste catalyst to form an ionic solution. Then, the solution is filtered through the first filter press 4. The filtrate is returned to the dilute hydrochloric acid preparation tank 2 to be reconstituted into a 7-9% dilute hydrochloric acid solution for recycling in the slurry hydrolysis tank. The filter blocks are thoroughly ground in the ball mill 5 to remove the organic carbon coating on the copper surface. Then, the solution is mixed with dilute hydrochloric acid in the stirring tank 6 to make the slurry acidic. Finally, it is sent to the soaking tank 7 and mixed with the by-product sodium hypochlorite solution according to the mass ratio. The reaction involves stirring and mixing sodium hypochlorite with dilute hydrochloric acid to produce hypochlorous acid. Hypochlorous acid is then used as an oxidant in the extraction of copper from waste catalyst, oxidizing elemental copper into a copper ion solution. The solution is then filtered through a second filter press 9. The filter blocks are treated as solid waste, while the filtrate is sent to a sponge copper container 10 where it is stirred and reacted with iron powder to replace iron. Finally, through filtration, washing, and drying, sponge copper is obtained and sold as a product. This invention features a simple and easy-to-implement connection, effectively utilizing sodium hypochlorite, reducing production costs, improving economic efficiency, and avoiding safety hazards and environmental pollution.

[0020] During the reaction in soaking tank 7, nitrogen gas is introduced into it. The nitrogen gas then promptly discharges the oxygen and trace amounts of chlorine generated in the reaction to acid washing tower 13 and alkali washing tower 14 for acid washing and alkali washing, respectively, before venting, thus avoiding environmental pollution.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A system for treating waste organosilicon catalysts, characterized in that, It includes a waste catalyst conveying pipeline, a dilute hydrochloric acid preparation tank, a slurry hydrolysis tank, a first filter press, a ball mill, a mixing tank, a soaking tank, a sodium hypochlorite storage tank, a second filter press, a sponge copper tank, and an iron powder silo. The discharge end of the waste catalyst conveying pipeline is connected to the inlet of the slurry hydrolysis tank, and the outlet of the dilute hydrochloric acid preparation tank is connected to the inlet of the slurry hydrolysis tank. The outlet of the slurry hydrolysis tank is connected to the inlet of the first filter press, and the filter block outlet of the first filter press is connected to the inlet of the ball mill. The ball mill's outlet is connected to the mixing tank's inlet; the dilute hydrochloric acid conveying pipeline's outlet is connected to the mixing tank's inlet; the mixing tank's outlet is connected to the soaking tank's inlet; the sodium hypochlorite storage tank's outlet is connected to the soaking tank's inlet; the soaking tank's outlet is connected to the second filter press's inlet; the second filter press's filtrate outlet is connected to the sponge copper tank's inlet; and the iron powder silo's outlet is connected to the sponge copper tank's inlet.

2. The organosilicon waste catalyst treatment system according to claim 1, characterized in that, The filtrate outlet of the first filter press is connected to the inlet of the dilute hydrochloric acid preparation tank.

3. A system for treating organosilicon waste catalyst according to claim 1 or 2, characterized in that, It also includes a nitrogen delivery pipeline, an acid washing tower, and an alkaline washing tower; the outlet of the nitrogen delivery pipeline is connected to the inlet of the soaking tank, the outlet of the soaking tank is connected to the inlet of the acid washing tower, and the outlet of the acid washing tower is connected to the inlet of the alkaline washing tower.

4. The organosilicon waste catalyst treatment system according to claim 3, characterized in that, Agitators are provided in the slurry hydrolysis tank, the stirring tank, the soaking tank, and the sponge copper tank.

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