Alcohol dehydration device for hard alloy mixture production

Abstract

The utility model discloses an alcohol dehydration device for producing a hard alloy mixture. The alcohol dehydration device sequentially comprises an alcohol recovery tank, a Ttower evaporator and a pervaporation device, a discharge port of the alcohol recovery tank is communicated with a feed port of the Taxel evaporator, a residue discharge port is formed in the bottom of the Taxel evaporator, and a discharge port in the top of the Taxel evaporator is communicated with a feed port of the pervaporation device; the pervaporation device is internally provided with a plurality of pervaporation membranes which are sequentially arranged along the flowing direction of alcohol, and the pervaporation membranes are limited permeable membranes; the pervaporation device is provided with an alcohol outlet and a penetrating fluid outlet, and the alcohol outlet is arranged corresponding to one side of the pervaporation membrane at the tail end, which is used for seeping alcohol, and is communicated with an alcohol condensing device; the penetrating fluid outlet is arranged corresponding to one side of seepage penetrating fluid of each pervaporation membrane and is communicated with a penetrating fluid condensing device; a liquid outlet of the alcohol condensing device is communicated with a liquid inlet of the alcohol finished product tank, and a liquid outlet of the penetrating fluid condensing device is communicated with a liquid inlet of the wastewater collecting tank.

Description

Technical Field

[0001] The utility model relates to the field of hard alloy production, in particular to an alcohol dehydration device for hard alloy mixture production. Background Art

[0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, etc., especially its high hardness and wear resistance, which remain basically unchanged even at a temperature of 500°C, and still have a high hardness at 1000°C. Cemented carbide is widely used as tool materials, such as turning tools, milling cutters, planers, drill bits, boring tools, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel, and can also be used to cut heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult-to-process materials.

[0003] Alcohol recovery is often required in the cemented carbide production process. Currently, the only way on the market is to simply filter the recovered alcohol containing a large amount of cemented carbide debris through a filter to remove the cemented carbide debris. On the one hand, the filtering effect of the filter is effective, but it is unable to filter fine impurities (such as cemented carbide debris, forming agent) more fully. On the other hand, in continuous production, the alcohol used for ball milling must meet the anhydrous alcohol standard. When the water content in the recycled alcohol exceeds a certain proportion, it cannot be used any longer. The filter cannot remove the water in the alcohol, and there is no corresponding alcohol recovery device on the market to solve the above problems.

[0004] In view of this, how to design an alcohol dehydration device for producing cemented carbide mixture to overcome the above-mentioned shortcomings is the research topic of the present utility model. Summary of the invention

[0005] The utility model provides an alcohol dehydration device for the production of cemented carbide mixtures, which dehydrates the circulating alcohol in the process, so that each ball-milled alcohol reaches the anhydrous alcohol standard, and solves the problems of loose density, unstable fluidity and oxidation of the mixture caused by the fluctuation of alcohol water content in the production process of the mixture.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An alcohol dehydration device for producing cemented carbide mixture:

[0008] It includes an alcohol recovery tank, a Taschini evaporator, and a pervaporation device in sequence;

[0009] The discharge port of the alcohol recovery tank is connected to the feed port of the Tadalafil evaporator, a residue discharge port is provided at the bottom of the Tadalafil evaporator, and the discharge port at the top of the Tadalafil evaporator is connected to the feed port of the pervaporation device;

[0010] The pervaporation device is provided with a plurality of pervaporation membranes arranged in sequence according to the alcohol flow direction, and the pervaporation membrane is a limited water permeable membrane; the pervaporation device is provided with an alcohol outlet and a permeate outlet, the alcohol outlet is arranged corresponding to the side of the pervaporation membrane at the end where the alcohol is seeping out, and is connected to the alcohol condensation device; the permeate outlet is arranged corresponding to the side of each pervaporation membrane where the permeate is seeping out, and is connected to the permeate condensation device; the liquid outlet of the alcohol condensation device is connected to the liquid inlet of the alcohol finished product tank, and the liquid outlet of the permeate condensation device is connected to the liquid inlet of the wastewater collection tank.

[0011] According to a further technical solution, the limited water permeable membrane is one or a combination of NaA type molecular sieve membrane, CHA type molecular sieve membrane, T type molecular sieve membrane, ZSM-5 type molecular sieve membrane, and MOR type molecular sieve membrane.

[0012] According to a further technical solution, the pore size of the limited water permeable membrane is 4.1-5.1A.

[0013] According to a further technical solution, the plurality of pervaporation membranes in the pervaporation device are connected in series, in parallel or in mixed connection.

[0014] According to a further technical solution, a vacuum pump group is provided between the permeate condensation device and the wastewater collection tank.

[0015] According to a further technical solution, the finished alcohol product tank may also be connected to a process alcohol tank.

[0016] A further technical solution is to connect a first valve in series in the pipeline from the finished alcohol tank to the process alcohol tank, add a reflux pipeline from the finished alcohol tank to the feed port of the pervaporation device, and connect a second valve in series on the reflux pipeline.

[0017] As for further technical solutions, the alcohol recovery tank, Taschini evaporator, alcohol condensation device, permeate condensation device, alcohol finished product tank, wastewater collection tank, vacuum pump group and process alcohol tank can all adopt existing technologies and are well known to those skilled in the art, so they will not be elaborated in this case.

[0018] The specific dehydration process of the alcohol dehydration device of the utility model is as follows:

[0019] Step 1, injecting the spray-dried recovered alcohol into a recovered alcohol tank;

[0020] Step 2: extract the alcohol from the recovery tank to the tower evaporator for evaporation to remove impurities such as molding agents in the alcohol to avoid clogging the pervaporation membrane, and regularly discharge residual molding agents such as paraffin from the bottom of the evaporator;

[0021] Step 3: The alcohol vapor is discharged from the top layer of the tower evaporator and dehydrated by a pervaporation membrane device. The pervaporation membrane uses a limited permeable membrane to obtain separated water on the permeation side and alcohol on the interception side. After multi-stage treatment, the water content is finally reduced to less than 0.5%;

[0022] Step 4, condense the alcohol on the interception side and inject it into the finished product tank;

[0023] Step 5: When the alcohol level in the finished product tank reaches a certain value, the alcohol is injected into the process tank for use in the mixed material feeding;

[0024] Step six, the water vapor on the permeate side is condensed and discharged into a wastewater collection tank.

[0025] The design principle and effect of this utility model:

[0026] The utility model technology dehydrates the circulating alcohol in the process so that each ball-milled alcohol reaches the anhydrous alcohol standard, thereby solving the problems of loose density, unstable fluidity and oxidation of the mixture caused by the fluctuation of alcohol water content in the production process of the mixture.

[0027] Among them, a tower evaporator is used to evaporate the waste alcohol to be treated, remove impurities such as molding agents in the alcohol, avoid clogging the pervaporation membrane, and residual paraffin and other molding agents are regularly discharged from the bottom of the evaporator.

[0028] Among them, the use of pervaporation membrane separation technology for dehydration of organic solvents has significant advantages in energy saving and emission reduction, and is particularly suitable for the separation of azeotropic and near-boiling mixtures. The pore size of the limited permeable membrane-molecular sieve membrane in this technical solution is set to 0.41-0.51 nm, which is larger than the diameter of water molecules but smaller than the diameter of most organic molecules, and has strong hydrophilicity, which is particularly suitable for pervaporation dehydration of organic solvents.

[0029] The alcohol dehydration device of the utility model can process a large amount of alcohol, and the processed alcohol can meet the standard of anhydrous ethanol, reducing the oxidation of powder by water in the alcohol and improving the quality stability of the mixture. It can realize the recycling of alcohol and reduce the generation of waste alcohol. The use of pervaporation membrane treatment process reduces the dehydration cost and greatly saves the procurement cost and hazardous waste treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 This is a schematic diagram of an alcohol dehydration device according to an embodiment of the utility model;

[0031] In the above attached figures: 1. Alcohol recovery tank; 2. Taschini evaporator; 3. Pervaporation device; 31. Pervaporation membrane; 4. Alcohol condensation device; 5. Permeate condensation device; 6. Alcohol finished product tank; 7. Wastewater collection tank; 8. Vacuum pump group; 9. Process alcohol tank; 11. First valve; 12. Second valve. Implementation

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0033] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0034] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0035] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0036] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0037] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0038] An alcohol dehydration device for producing cemented carbide mixture

[0039] like Figure 1 As shown, an alcohol dehydration device for producing cemented carbide mixture:

[0040] It includes an alcohol recovery tank 1, a Taschini evaporator 2, and a pervaporation device 3 in sequence;

[0041] The discharge port of the alcohol recovery tank 1 is connected to the feed port of the Tadalafil evaporator 2. The bottom of the Tadalafil evaporator 2 is provided with a residue discharge port. The discharge port at the top of the Tadalafil evaporator 2 is connected to the feed port of the pervaporation device 3.

[0042] The pervaporation device 3 is provided with several pervaporation membranes 31 arranged in sequence according to the alcohol flow direction, and the pervaporation membrane 31 is a limited water permeable membrane; the pervaporation device 3 is provided with an alcohol outlet and a permeate outlet, the alcohol outlet is arranged corresponding to the side of the pervaporation membrane 31 at the end where the alcohol is seeping out, and is connected to the alcohol condensation device 4; the permeate outlet is arranged corresponding to the side of each pervaporation membrane where the permeate is seeping out, and is connected to the permeate condensation device 5; the liquid outlet of the alcohol condensation device 4 is connected to the liquid inlet of the alcohol finished product tank 6, and the liquid outlet of the permeate condensation device 5 is connected to the liquid inlet of the wastewater collection tank 7.

[0043] In this embodiment, the limited water permeable membrane is a NaA type molecular sieve membrane, but CHA type molecular sieve membrane, T type molecular sieve membrane, ZSM-5 type molecular sieve membrane, MOR type molecular sieve membrane can also be selected.

[0044] The pore size of the NaA type molecular sieve membrane used in this embodiment is 4.2A.

[0045] The plurality of pervaporation membranes 31 in the pervaporation device 3 are connected in series, in parallel or in mixed connection.

[0046] A vacuum pump group 8 is provided between the permeate condensation device 5 and the wastewater collection tank 7 .

[0047] The finished alcohol product tank 6 is connected to the process alcohol tank 9 .

[0048] A first valve 11 is connected in series in the pipeline from the alcohol finished product tank 6 to the process alcohol tank 9, and a reflux pipeline is added from the alcohol finished product tank 6 to the feed port of the pervaporation device 3, and a second valve 12 is connected in series on the reflux pipeline.

[0049] The plurality of pervaporation membranes 31 in the pervaporation device 3 are connected in series, in parallel or in mixed connection. In the present embodiment, the pervaporation membranes 31 are connected in series. Increasing the number of pervaporation membranes 31 connected in series on the same pipeline will theoretically improve the dehydration efficiency of the alcohol. The pervaporation membranes 31 are connected in parallel, and the more parallel pipelines there are, the more alcohol can be processed per unit time in theory. In actual operation, the pervaporation membranes 31 can be connected in parallel (in parallel) or partially in parallel (in mixed connection) according to different situations.

[0050] The alcohol dehydration device can also be used for dehydrating other solvents, such as acetone and n-hexane. For the utility model, other types of molecular sieve membranes and corresponding pore sizes can also be replaced.

[0051] The specific dehydration process of the alcohol dehydration device in this embodiment is as follows:

[0052] Step 1, injecting the spray-dried recovered alcohol into the recovered alcohol tank 1;

[0053] Step 2: extract the alcohol 1 from the recovery tank to the tower evaporator 2 for evaporation to remove impurities such as the molding agent in the alcohol to avoid clogging the pervaporation membrane, and regularly discharge the residual paraffin and other molding agents from the bottom of the tower evaporator 2;

[0054] Step 3: The alcohol vapor is discharged from the top layer of the tower evaporator 2 and dehydrated through the pervaporation device 3. The pervaporation membrane adopts a limited permeable membrane, and the separated water is obtained on the permeation side, and the alcohol is obtained on the interception side. After multi-stage treatment, the water content is finally reduced to less than 0.5%;

[0055] Step 4: condense the alcohol on the interception side and inject it into the finished product tank 6;

[0056] Step 5: When the alcohol level in the finished product tank 6 reaches a certain value, the alcohol is injected into the process tank 9 for feeding the mixed material;

[0057] Step 6: The water vapor on the permeate side is condensed and discharged into a wastewater collection tank 7.

[0058] In addition, a vacuum pump group 8 is arranged between the permeate condensation device 5 and the wastewater collection tank 7, and the water in the alcohol is separated by passing through the membrane assembly through vacuum.

[0059] The finished alcohol tank 6 is connected to the process alcohol tank 9. After the alcohol in the finished alcohol tank is tested to be qualified, the alcohol is transferred to the process alcohol tank for subsequent ball milling.

[0060] For the detection link, a first valve 11 can be connected in series in the pipeline from the alcohol finished product tank 6 to the process alcohol tank 9, and a reflux pipeline from the alcohol finished product tank 6 to the feed port of the pervaporation device 3 is added, and a second valve 12 is connected in series on the reflux pipeline.

[0061] If the alcohol in 6 is qualified, the first valve 11 is opened and the second valve 12 is closed to transfer the alcohol to the process alcohol tank 9; if the alcohol in the finished alcohol tank 6 is unqualified (the water content is still high), the second valve 2 is opened and the first valve 1 is closed to allow the alcohol to flow back to the pervaporation device 3 for repeated dehydration until the water content of the alcohol entering the finished alcohol tank 6 reaches the set requirement.

[0062] The above-mentioned detection can be performed manually, or a detection device for detecting the water content of alcohol can be set for the alcohol finished product tank 6. The detection device can be a prior art. The water content of alcohol in the alcohol finished product tank 6 is detected in real time by the detection device, and the feedback is fed back to the control system. The control system determines whether the water content of alcohol is qualified, and then determines whether to issue an execution instruction to the first valve 11 or the second valve 12, thereby realizing full automatic operation, which not only improves the effect of alcohol dehydration, but also improves the dehydration efficiency.

[0063] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An alcohol dehydration device for producing cemented carbide mixture, characterized in that : It comprises an alcohol recovery tank (1), a Taschini evaporator (2), and a pervaporation device (3); The discharge port of the alcohol recovery tank (1) is connected to the feed port of the Tadalafil evaporator (2), a residue discharge port is provided at the bottom of the Tadalafil evaporator (2), and the discharge port at the top of the Tadalafil evaporator (2) is connected to the feed port of the pervaporation device (3); The pervaporation device (3) is provided with a plurality of pervaporation membranes (31) arranged in sequence according to the alcohol flow direction, and the pervaporation membranes (31) are limited water permeable membranes; the pervaporation device (3) is provided with an alcohol outlet and a permeate outlet, the alcohol outlet is arranged corresponding to the side of the pervaporation membrane (31) at the end where the alcohol is permeated, and is connected to the alcohol condensation device (4); the permeate outlet is arranged corresponding to the side of the permeate permeated from each of the pervaporation membranes, and is connected to the permeate condensation device (5); the liquid outlet of the alcohol condensation device (4) is connected to the liquid inlet of the alcohol finished product tank (6), and the liquid outlet of the permeate condensation device (5) is connected to the liquid inlet of the wastewater collection tank (7).

2. The alcohol dehydration device for producing cemented carbide mixture according to claim 1, characterized in that: The limited water permeable membrane is one or a combination of NaA type molecular sieve membrane, CHA type molecular sieve membrane, T type molecular sieve membrane, ZSM-5 type molecular sieve membrane, MOR type molecular sieve membrane.

3. The alcohol dehydration device for producing cemented carbide mixture according to claim 1, characterized in that: The pore size of the limited water permeable membrane is 4.1-5.1A.

4. The alcohol dehydration device for producing cemented carbide mixture according to claim 1, characterized in that: The plurality of pervaporation membranes (31) in the pervaporation device (3) are connected in series, in parallel or in mixed connection.

5. The alcohol dehydration device for producing cemented carbide mixture according to claim 1, characterized in that: A vacuum pump group (8) is provided between the permeate condensation device (5) and the wastewater collection tank (7).

6. The alcohol dehydration device for producing cemented carbide mixture according to claim 1, characterized in that: The alcohol outlet of the finished alcohol tank (6) is connected to the alcohol inlet of a process alcohol tank (9).

7. The alcohol dehydration device for producing cemented carbide mixture according to claim 6, characterized in that: A first valve (11) is connected in series in the pipeline from the alcohol product tank (6) to the process alcohol tank (9), and a reflux pipeline is added from the alcohol product tank (6) to the feed port of the pervaporation device (3), and a second valve (12) is connected in series in the reflux pipeline.

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