CN220311301U - Solid waste treatment system for nitromethane production process - Google Patents
Solid waste treatment system for nitromethane production process Download PDFInfo
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- CN220311301U CN220311301U CN202321764161.9U CN202321764161U CN220311301U CN 220311301 U CN220311301 U CN 220311301U CN 202321764161 U CN202321764161 U CN 202321764161U CN 220311301 U CN220311301 U CN 220311301U
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- Prior art keywords
- solid
- liquid separation
- separation device
- pipeline
- production process
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- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000009270 solid waste treatment Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000000926 separation method Methods 0.000 claims abstract description 46
- 238000004090 dissolution Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000002910 solid waste Substances 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims description 13
- 239000000706 filtrate Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000000967 suction filtration Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 150000002923 oximes Chemical class 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 238000011549 displacement method Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 description 1
- 229940106681 chloroacetic acid Drugs 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- VUQUOGPMUUJORT-UHFFFAOYSA-N methyl 4-methylbenzenesulfonate Chemical compound COS(=O)(=O)C1=CC=C(C)C=C1 VUQUOGPMUUJORT-UHFFFAOYSA-N 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 239000012430 organic reaction media Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The utility model provides a solid waste treatment system for nitromethane production process, which comprises a dissolution kettle, a first solid-liquid separation device, a second solid-liquid separation device and a drying device for drying filter residues, wherein the dissolution kettle is used for containing and dissolving solid waste in nitromethane production process, the input end of the dissolution kettle is connected with a water supply device, the output end of the dissolution kettle is connected with the filtering end of the first solid-liquid separation device, and the output end of the first solid-liquid separation device is connected with the filtering end of the second solid-liquid separation device. The utility model simplifies the treatment process of the solid waste in the nitromethane production process, removes the chemical treatment method, adopts the adsorption method to treat, has simple and effective treatment process, and reduces the treatment cost.
Description
Technical Field
The utility model relates to the technical field of nitromethane production, in particular to a solid waste treatment system for a nitromethane production process.
Background
Nitromethane is colorless and transparent oily liquid with aromatic flavor and certain volatility, can be used as a solvent, an organic synthesis intermediate, an organic reaction medium, fuel and industrial explosive raw materials, and can also be used as a polymerization inhibitor, an antistatic agent, an adhesive and the like, and the application is wide.
There are many schemes for synthesizing nitromethane, except for chloroacetic acid method, haloalkane method, methyl tosylate method, etc., at present, two technological routes of gas-phase nitration method and nitrite replacement method are the most interesting at home and abroad. The nitrite displacement method has the advantages of simple operation, easily available raw materials, low production cost, easy industrialization and the like, and is the method for synthesizing nitromethane most industrially in China at present, but the nitrite displacement method has the problems, namely the environmental protection problem: a large amount of red brown waste residue byproducts are generated in the production process, and the waste residue mainly comprises nitrogen-containing organic matters and sulfates with complex components, wherein the nitrogen-containing organic matters mainly comprise oxime acid salts, and account for about 1-2% of the total amount; the sulfate is the main part, basically sodium sulfate, and contains a very small amount of unreacted sodium nitrite, and accounts for about 90-95% of the total amount. The waste residue solution is dark brown, has certain viscosity and is extremely difficult to treat. If the waste residues are simply buried, the environment is polluted; secondly, the main component sodium sulfate of the waste residue has recycling value, and the direct landfill can cause the waste of resources.
In order to solve the problems, the prior art realizes structural rearrangement and acidolysis of by-product oxime acid salt in waste residue under high temperature and high pressure by arranging an acidolysis reactor and adding acidolysis solution, and finally converts the by-product oxime acid salt into colorless and transparent nitromethane and salt-containing solution; then, through processing in a freezing crystallizer and an evaporating crystallizer respectively, the crystallization and precipitation of the mixed salt in the mixed solution are promoted, and the white pure mixed salt is obtained; however, this treatment method requires additional acidolysis treatment, and then freezing crystallization and evaporating crystallization, so that the treatment cost is high, and therefore, a solid waste treatment system for nitromethane production process with simple treatment process, good treatment effect and low cost is needed.
Disclosure of Invention
In order to solve the problems in the background art, the utility model provides a solid waste treatment system for a nitromethane production process, which comprises a dissolution kettle, a first solid-liquid separation device, a second solid-liquid separation device and a drying device for drying filter residues, wherein the dissolution kettle is used for containing and dissolving solid waste in the nitromethane production process, the input end of the dissolution kettle is connected with a water supply device, the output end of the dissolution kettle is connected with the filtering end of the first solid-liquid separation device, and the output end of the first solid-liquid separation device is connected with the filtering end of the second solid-liquid separation device.
Preferably, the water temperature in the water supply device is 30-50 ℃.
Preferably, the input end of the dissolution kettle is connected with the water supply equipment through a first pipeline, and a first pumping device is arranged on the first pipeline;
the output end of the dissolution kettle is connected with the filtering end of the first solid-liquid separation device through a second pipeline, and a second pumping device is arranged on the second pipeline;
the output end of the first solid-liquid separation device is connected with the filtering end of the second solid-liquid separation device through a third pipeline, and a third pumping device is arranged on the third pipeline.
Preferably, a containing vessel for cooling and placing filtrate is arranged between the first solid-liquid separation device and the second solid-liquid separation device, one end, close to the second solid-liquid separation device, of the third pipeline is communicated with the containing vessel, the second solid-liquid separation device is communicated with the containing vessel through a fourth pipeline, and a fourth pumping device is arranged on the fourth pipeline.
Preferably, the dissolution kettle is provided with a stirring device, the stirring device comprises a motor and a rotating shaft provided with stirring blades, the motor is arranged on the outer wall of the dissolution kettle, the output end of the motor extends into the dissolution kettle, and the rotating shaft is connected with the output end of the motor.
Preferably, the solid-liquid separation device is a centrifuge or a suction filter.
Preferably, the output end of the second solid-liquid separation device is connected with a filtrate recovery device through a fifth pipeline, and a drain valve is arranged on the fifth pipeline.
The utility model has the beneficial effects that: the utility model simplifies the treatment process of the solid waste in the nitromethane production process, removes the chemical treatment method, adopts the adsorption method to treat, has simple and effective treatment process, and reduces the treatment cost.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
reference numerals in the drawings: 1. a dissolution kettle; 2. a first solid-liquid separation device; 3. a second solid-liquid separation device; 4. a receiving device; 5. a first pipe; 6. a second pipe; 7. a third conduit; 8. a fourth conduit; 9. a drain valve; 10. a water supply device; 11. a stirring device; 111. a rotating shaft; 112. and a motor.
Detailed Description
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Referring to fig. 1, a solid waste treatment system for nitromethane production process comprises a dissolution kettle 1, a first solid-liquid separation device 2, a second solid-liquid separation device 3 and a drying device for drying filter residues, wherein the dissolution kettle 1 is used for containing and dissolving solid waste in nitromethane production process, the input end of the dissolution kettle 1 is connected with a water supply device 10 through a first pipeline 5, a first pumping device is arranged on the first pipeline 5, the output end of the dissolution kettle 1 is connected with the filtering end of the first solid-liquid separation device 2 through a second pipeline 6, a second pumping device is arranged on the second pipeline 6, the output end of the first solid-liquid separation device 2 is connected with the filtering end of the second solid-liquid separation device 3 through a third pipeline 7, the output end of the second solid-liquid separation device 3 is connected with a filtrate recovery device through a fifth pipeline, and a drain valve 9 is arranged on the fifth pipeline, and the solid-liquid separation device can adopt a centrifuge or a suction filter.
Specifically, the water temperature in the water supply device 10 is 30-50 ℃.
Specifically, a containing vessel for cooling and placing filtrate is arranged between the first solid-liquid separation device 2 and the second solid-liquid separation device 3, one end, close to the second solid-liquid separation device 3, of the third pipeline 7 is communicated with the containing vessel, the second solid-liquid separation device 3 is communicated with the containing vessel through a fourth pipeline 8, and a fourth pumping device is arranged on the fourth pipeline 8.
Specifically, the dissolution kettle 1 is provided with a stirring device 11, the stirring device 11 comprises a motor 112 and a rotating shaft 111 provided with stirring blades, the motor 112 is arranged on the outer wall of the dissolution kettle 1, the output end of the motor 112 stretches into the dissolution kettle 1, and the rotating shaft 111 is connected with the output end of the motor 112.
The working flow is as follows: putting solid waste generated in the nitromethane production process into a dissolution kettle 1, introducing a certain amount of water with the temperature of 30-50 ℃ into the dissolution kettle 1 by a water supply device 10, dissolving the solid waste into the water at the temperature of 30-50 ℃, introducing the dissolved solid waste solution into a Buchner funnel of a first suction filter, performing suction filtration on the solution by the first suction filter, starting a second pumping device after the suction filtration is finished, introducing filtrate into a containing device 4, placing the containing device 4 at a low temperature (4-2 ℃) so as to enable the filtrate to be placed under the low temperature for recrystallization, starting a third pumping device after the recrystallization is finished, introducing the filtrate into the Buchner funnel of the second suction filter, performing suction filtration on the filtrate by the second suction filter, after the suction filtration is finished, discharging the filtrate into a filtrate recovery device for treatment, taking out filter residues in a first suction filter and a second suction filter, putting the filter residues into a dissolution kettle 1, adding active carbon with a certain weight ratio (0.5-2%) into the dissolution kettle 1, introducing a certain amount of water with the temperature of 30-50 ℃ into the dissolution kettle 1 by a water supply device 10, starting a motor 112 to stir and decolor the filter residues, then sequentially passing through the first suction filter, a containing device 4 and the second suction filter for suction filtration, recrystallizing and suction filtration, taking out the filter residues obtained by suction filtration of the first suction filter and the second suction filter, putting the filter residues into a drying device for drying, obtaining white-like products, and finishing the solid waste treatment of the nitromethane production process.
The foregoing detailed description of the embodiments of the utility model has been presented in conjunction with the drawings, but the utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.
Claims (7)
1. A nitromethane production technology solid waste treatment system is characterized in that: including dissolving cauldron (1), first solid-liquid separation device (2), second solid-liquid separation device (3) and the drying device who is used for drying the filter residue, dissolve cauldron (1) and be arranged in holding and dissolving the solid waste in the nitromethane production technology, dissolve cauldron (1) input and be connected with water supply equipment (10), dissolve cauldron (1) output and first solid-liquid separation device (2) filter tip and be connected, first solid-liquid separation device (2) output and second solid-liquid separation device (3) filter tip are connected.
2. The nitromethane production process solid waste treatment system according to claim 1, wherein: the water temperature in the water supply device (10) is 30-50 ℃.
3. The nitromethane production process solid waste treatment system according to claim 1, wherein: the input end of the dissolution kettle (1) is connected with the water supply equipment (10) through a first pipeline (5), and a first pumping device is arranged on the first pipeline (5);
the output end of the dissolution kettle (1) is connected with the filtering end of the first solid-liquid separation device (2) through a second pipeline (6), and a second pumping device is arranged on the second pipeline (6);
the output end of the first solid-liquid separation device (2) is connected with the filtering end of the second solid-liquid separation device (3) through a third pipeline (7), and a third pumping device is arranged on the third pipeline (7).
4. A nitromethane production process solid waste treatment system as claimed in claim 3, wherein: the device is characterized in that a containing vessel for cooling and placing filtrate is arranged between the first solid-liquid separation device (2) and the second solid-liquid separation device (3), one end, close to the second solid-liquid separation device (3), of the third pipeline (7) is communicated with the containing vessel, the second solid-liquid separation device (3) is communicated with the containing vessel through a fourth pipeline (8), and a fourth pumping device is arranged on the fourth pipeline (8).
5. The nitromethane production process solid waste treatment system according to claim 1, wherein: be equipped with agitating unit (11) on dissolving kettle (1), agitating unit (11) include motor (112) and are equipped with stirring vane's pivot (111), motor (112) are installed in the outer wall of dissolving kettle (1), and in motor (112) output stretched into dissolving kettle (1), pivot (111) are connected with motor (112) output.
6. The nitromethane production process solid waste treatment system according to claim 1, wherein: the solid-liquid separation device is a centrifuge or a suction filter.
7. The nitromethane production process solid waste treatment system according to claim 1, wherein: the output end of the second solid-liquid separation device (3) is connected with a filtrate recovery device through a fifth pipeline, and a drain valve (9) is arranged on the fifth pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321764161.9U CN220311301U (en) | 2023-07-06 | 2023-07-06 | Solid waste treatment system for nitromethane production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321764161.9U CN220311301U (en) | 2023-07-06 | 2023-07-06 | Solid waste treatment system for nitromethane production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220311301U true CN220311301U (en) | 2024-01-09 |
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ID=89425872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321764161.9U Active CN220311301U (en) | 2023-07-06 | 2023-07-06 | Solid waste treatment system for nitromethane production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220311301U (en) |
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2023
- 2023-07-06 CN CN202321764161.9U patent/CN220311301U/en active Active
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