CN219783917U - Filter system is used in production of carbazide crystallization feed liquid - Google Patents
Filter system is used in production of carbazide crystallization feed liquid Download PDFInfo
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- CN219783917U CN219783917U CN202321382854.1U CN202321382854U CN219783917U CN 219783917 U CN219783917 U CN 219783917U CN 202321382854 U CN202321382854 U CN 202321382854U CN 219783917 U CN219783917 U CN 219783917U
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- liquid
- communicated
- centrifugal machine
- carbazide
- pipe
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- 239000007788 liquid Substances 0.000 title claims abstract description 100
- 238000002425 crystallisation Methods 0.000 title claims abstract description 32
- 230000008025 crystallization Effects 0.000 title claims abstract description 31
- XEVRDFDBXJMZFG-UHFFFAOYSA-N carbonyl dihydrazine Chemical compound NNC(=O)NN XEVRDFDBXJMZFG-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 21
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 62
- 239000007789 gas Substances 0.000 claims description 59
- 238000009826 distribution Methods 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 10
- 239000012452 mother liquor Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 230000002269 spontaneous effect Effects 0.000 abstract description 12
- 238000004880 explosion Methods 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- WFJRIDQGVSJLLH-UHFFFAOYSA-N methyl n-aminocarbamate Chemical compound COC(=O)NN WFJRIDQGVSJLLH-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Centrifugal Separators (AREA)
Abstract
The utility model relates to the technical field of chemical equipment, in particular to a filtering system for producing carbazide crystallization feed liquid, which comprises a centrifugal machine communicated with a crystallization kettle, wherein the upper part of the centrifugal machine is provided with an emptying device, a liquid outlet of the centrifugal machine is communicated with a liquid seal tank, an oxygen sensor is arranged in the liquid seal tank, and the liquid outlet of the liquid seal tank is communicated with a mother liquid collecting tank; the inside of the centrifugal machine is provided with a nitrogen inlet pipe, and a valve of the nitrogen inlet pipe, an oxygen sensor and a motor of the centrifugal machine are respectively and electrically connected with a controller. The filter system has reasonable design, and can effectively prevent spontaneous combustion or spontaneous explosion phenomenon caused by high oxygen concentration during filtration.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to a filtering system for producing carbazide crystallization feed liquid.
Background
The carbazide is a derivative of hydrazine, the production and synthesis process mainly uses methanol as a solvent, and methyl carbazate generated by the reaction of hydrazine hydrate and dimethyl carbonate further reacts with excessive hydrazine hydrate to generate carbazide; the carbazide synthetic feed liquid is evaporated and concentrated, crystallized and then enters a centrifugal filtering device to separate and remove mother liquor, and because the carbazide synthetic feed liquid contains methanol solvent and incompletely reacted dimethyl carbonate, the raw materials are inflammable and explosive, the condition that the oxygen content exceeds the standard (the upper limit is 5% vol) often occurs in the practical operation of centrifugal filtration, and when the combustible gas mixed with oxygen reaches the explosion limit, the risk of spontaneous combustion and even flash explosion can occur due to static accumulation formed by open fire or air flow friction, so that the filter system for producing the carbazide crystalline feed liquid needs to be developed aiming at the problems.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: aiming at the defects of the prior art, the filtering system for producing the carbazide crystallization feed liquid is provided, and the mother liquid in the crystallization feed liquid can be discharged by utilizing the filtering system, and the risk of spontaneous combustion and even flash explosion can be avoided.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the filtering system for producing the carbazide crystallization feed liquid comprises a centrifugal machine communicated with a crystallization kettle, wherein an emptying device is arranged at the upper part of the centrifugal machine, a liquid outlet of the centrifugal machine is communicated with a liquid seal tank, an oxygen sensor is arranged in the liquid seal tank, and the liquid outlet of the liquid seal tank is communicated with a mother liquid collecting tank; the inside of centrifuge is equipped with nitrogen gas and advances the pipe, nitrogen gas advances the valve of pipe, oxygen sensor the motor of centrifuge is electric connection director respectively.
As an improved technical scheme, the emptying device comprises a gas collecting hood, and an exhaust port of the gas collecting hood is communicated with an induced draft fan.
As an improved technical scheme, a gas distributor communicated with the nitrogen inlet pipe is arranged above the inside of the centrifugal machine, the gas distributor comprises a circular gas distribution main pipe, and a plurality of gas distribution branch pipes communicated with the gas distribution main pipe are arranged on the gas distribution main pipe.
As an improved technical scheme, a flow regulating valve is arranged on the nitrogen inlet pipe and is electrically connected with a controller.
As an improved technical scheme, the liquid outlet of the centrifugal machine is communicated with the liquid seal tank through a liquid outlet pipe, one end of the liquid outlet pipe is communicated with the liquid outlet, and the other end of the liquid outlet pipe extends into the bottom of the liquid seal tank.
As an improved technical scheme, the cleaning fluid inlet of the centrifugal machine is communicated with the methanol storage tank through a methanol conveying pipeline, and a flow regulating valve and a cut-off valve on the methanol conveying pipeline are respectively and electrically connected with a controller.
After the technical scheme is adopted, the utility model has the beneficial effects that:
the filtering system for producing the carbazide crystallization feed liquid comprises a centrifugal machine communicated with a crystallization kettle, wherein an emptying device is arranged at the upper part of the centrifugal machine, a liquid outlet of the centrifugal machine is communicated with a liquid seal tank, an oxygen sensor is arranged in the liquid seal tank, and the liquid outlet of the liquid seal tank is communicated with a mother liquid collecting tank; the inside of the centrifugal machine is provided with a nitrogen inlet pipe, and a valve of the nitrogen inlet pipe, an oxygen sensor and a motor of the centrifugal machine are respectively and electrically connected with a controller. In actual production, the carbazide crystallization feed liquid in the crystallization kettle enters the inside of the centrifugal machine along the pipeline, and the mother liquid after centrifugal separation enters the inside of the liquid seal tank from the liquid discharge port and then enters the inside of the mother liquid collection tank through the pipeline. The centrifugal mother liquor enters the liquid seal tank from the liquid outlet and then can be detected by the oxygen sensor, when the oxygen concentration is higher, the controller opens the nitrogen inlet valve and simultaneously closes the motor of the centrifugal machine, nitrogen enters the centrifugal machine along the nitrogen inlet pipeline, and the nitrogen is utilized to further press the oxygen into the liquid seal tank; after centrifugal filtration is finished, the top cover of the centrifugal machine is opened, and gas in the centrifugal machine is discharged through the emptying device. The filter system is reasonable in design, can effectively prevent spontaneous combustion or spontaneous explosion phenomenon from occurring due to high oxygen concentration content during filtration, and simultaneously reduces environmental pollution.
Because the evacuating device comprises the gas collecting hood, the exhaust port of the gas collecting hood is communicated with the induced draft fan. After the cover of the centrifugal machine is opened, gas in the centrifugal machine enters the waste gas treatment tower from the exhaust port of the gas collecting hood along the pipeline under the action of the induced draft fan, and is discharged into the atmosphere after being treated. The emptying device with the structure is reasonable in design and reduces pollution to the surrounding environment.
Because the gas distributor communicated with the nitrogen inlet pipe is arranged above the inside of the centrifugal machine, the gas distributor comprises a circular gas distribution main pipe, a plurality of gas distribution branch pipes communicated with the gas distribution main pipe are arranged on the gas distribution main pipe, and a plurality of gas distribution holes are respectively arranged on the gas distribution main pipe and the gas distribution branch pipes. The nitrogen gas is along the inside that nitrogen gas advances pipe entering gas distribution main pipe and a plurality of gas distribution branch pipe, passes the gas distribution hole and evenly distributes, avoids oxygen to get into centrifuge's inside, and then avoids spontaneous combustion and the phenomenon of spontaneous explosion.
Because the nitrogen inlet pipe is provided with the flow regulating valve, the flow regulating valve is electrically connected with the controller. The flow of nitrogen entering the centrifuge is conveniently adjusted by the controller.
Because the liquid outlet of the centrifugal machine is communicated with the liquid seal tank through the liquid outlet pipe, one end of the liquid outlet pipe is communicated with the liquid outlet, and the other end of the liquid outlet pipe extends into the bottom of the liquid seal tank. After nitrogen enters the inside of the centrifugal machine, oxygen in the centrifugal machine is discharged into the liquid seal tank along with crystallization mother liquor, and then enters the inside of the mother liquor collecting tank. Through the liquid seal tank with the structure, oxygen can be effectively prevented from entering the centrifuge.
Because the cleaning fluid inlet of the centrifugal machine is communicated with the methanol storage tank through the methanol conveying pipeline, the flow regulating valve and the cut-off valve on the methanol conveying pipeline are respectively and electrically connected with the controller. When the carbazide crystallization material is required to be rinsed, the controller opens the flow regulating valve, and methanol in the methanol storage tank enters the centrifuge along the methanol conveying pipeline to rinse the carbazide crystallization material, so that the purity of the product is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a filtration system for producing carbazide crystallization feed liquid according to the present utility model;
FIG. 2 is a schematic view of the gas distributor of FIG. 1;
the device comprises a 1-crystallization kettle, a 2-centrifuge, a 20-motor, a 3-emptying device, a 30-gas collecting hood, a 31-induced draft fan, a 4-liquid seal tank, a 5-oxygen sensor, a 6-mother liquor collecting tank, a 7-nitrogen inlet pipe, a 70-valve, an 8-controller, a 9-gas distributor, a 90-gas distribution main pipe, a 91-gas distribution branch pipe, a 10-methanol storage tank, a 11-methanol conveying pipeline, a 110-cut-off valve, a 111-flow regulating valve and a 12-liquid discharge pipeline.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The filtering system for producing the carbazide crystallization feed liquid is shown in fig. 1, and comprises a centrifugal machine 2 (purchased from a manufacturer) communicated with a crystallization kettle 1, wherein an evacuating device 3 is arranged at the upper part of the centrifugal machine 2, a liquid outlet of the centrifugal machine 2 is communicated with a liquid seal tank 4, an oxygen sensor 5 is arranged in the liquid seal tank 4, and a liquid outlet of the liquid seal tank 4 is communicated with a mother liquid collecting tank 6; the inside of the centrifugal machine 2 is provided with a nitrogen inlet pipe 7, and a valve 70 of the nitrogen inlet pipe 7, the oxygen sensor 5 and a motor of the centrifugal machine 2 are respectively and electrically connected with a controller 8.
In actual production, the carbazide crystallization feed liquid in the crystallization kettle enters the inside of the centrifugal machine along the pipeline, and the mother liquid after centrifugal separation enters the inside of the liquid seal tank from the liquid discharge port and then enters the inside of the mother liquid collection tank through the pipeline. The centrifugal mother liquor enters the liquid seal tank from the liquid outlet and then can be detected by the oxygen sensor, when the oxygen concentration is higher, the controller opens the nitrogen inlet valve and simultaneously closes the motor of the centrifugal machine, nitrogen enters the centrifugal machine along the nitrogen inlet pipeline, and the nitrogen is utilized to further press the oxygen into the liquid seal tank; after centrifugal filtration is finished, the top cover of the centrifugal machine is opened, and gas in the centrifugal machine is discharged through the emptying device. The filter system is reasonable in design, can effectively prevent spontaneous combustion or spontaneous explosion phenomenon from occurring due to high oxygen concentration content during filtration, and simultaneously reduces environmental pollution.
Wherein the evacuating device 3 comprises a gas collecting hood 30, and an exhaust port of the gas collecting hood 30 is communicated with an induced draft fan 31. After the cover of the centrifugal machine is opened, gas in the centrifugal machine enters the waste gas treatment tower from the exhaust port of the gas collecting hood along the pipeline under the action of the induced draft fan, and is discharged into the atmosphere after being treated. The emptying device with the structure is reasonable in design and reduces pollution to the surrounding environment.
Wherein the inside top of centrifuge 2 is equipped with the gas distributor 9 that is linked together with nitrogen gas advance pipe 7, and gas distributor 9 includes annular gas distribution person in charge 90, is equipped with a plurality of gas distribution branch pipes 91 that are linked together with gas distribution person in charge 90 on the gas distribution person in charge 90, is equipped with a plurality of gas distribution holes on gas distribution person in charge 90 and a plurality of gas distribution branch pipes 91 respectively. The nitrogen gas is along the inside that nitrogen gas advances pipe entering gas distribution main pipe and a plurality of gas distribution branch pipe, passes the gas distribution hole and evenly distributes, avoids oxygen to get into centrifuge's inside, and then avoids spontaneous combustion and the phenomenon of spontaneous explosion.
Wherein the nitrogen inlet pipe 7 is provided with a flow regulating valve 71 which is electrically connected with the controller 8. The flow of nitrogen entering the centrifuge is conveniently adjusted by the controller.
Wherein the liquid outlet of the centrifuge 2 is communicated with the liquid seal tank 4 through a liquid outlet pipe 12, one end of the liquid outlet pipe 12 is communicated with the liquid outlet, and the other end of the liquid outlet pipe 12 extends into the bottom of the liquid seal tank 4. After nitrogen enters the inside of the centrifugal machine, oxygen in the centrifugal machine is discharged into the liquid seal tank along with crystallization mother liquor, and then enters the inside of the mother liquor collecting tank. Through the liquid seal tank with the structure, oxygen can be effectively prevented from entering the centrifuge.
Wherein the cleaning liquid inlet of the centrifugal machine 2 is communicated with the methanol storage tank 10 through a methanol conveying pipeline 11, and a flow regulating valve 111 and a shut-off valve 110 on the methanol conveying pipeline are respectively and electrically connected with the controller 8. When the carbazide crystallization material is required to be rinsed, the controller opens the flow regulating valve, and methanol in the methanol storage tank enters the centrifuge along the methanol conveying pipeline to rinse the carbazide crystallization material, so that the purity of the product is greatly improved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (6)
1. The utility model provides a filtering system is used in production of carbazide crystallization feed liquid which characterized in that: the device comprises a centrifugal machine communicated with a crystallization kettle, wherein an emptying device is arranged at the upper part of the centrifugal machine, a liquid outlet of the centrifugal machine is communicated with a liquid seal tank, an oxygen sensor is arranged in the liquid seal tank, and the liquid outlet of the liquid seal tank is communicated with a mother liquor collecting tank; the inside of centrifuge is equipped with nitrogen gas and advances the pipe, nitrogen gas advances the valve of pipe, oxygen sensor the motor of centrifuge is electric connection director respectively.
2. The filtration system for producing carbazide crystallization feed liquid according to claim 1, wherein: the emptying device comprises a gas collecting hood, and an exhaust port of the gas collecting hood is communicated with an induced draft fan.
3. The filtration system for producing carbazide crystallization feed liquid according to claim 1, wherein: the inside top of centrifuge be equipped with the gas distributor that nitrogen gas advances the pipe and is linked together, the gas distributor includes annular gas distribution main pipe, be equipped with on the gas distribution main pipe a plurality of with the gas distribution branch pipe that the gas distribution is responsible for and is linked together, gas distribution main pipe and a plurality of gas distribution branch pipe are last to be equipped with a plurality of gas distribution holes respectively.
4. The filtration system for producing carbazide crystallization feed liquid according to claim 1, wherein: the nitrogen inlet pipe is provided with a flow regulating valve which is electrically connected with the controller.
5. The filtration system for producing carbazide crystallization feed liquid according to claim 1, wherein: the liquid outlet of the centrifugal machine is communicated with the liquid seal tank through a liquid outlet pipe, one end of the liquid outlet pipe is communicated with the liquid outlet, and the other end of the liquid outlet pipe extends into the bottom of the liquid seal tank.
6. The filtration system for producing carbazide crystallization feed liquid according to claim 1, wherein: the cleaning fluid inlet of the centrifugal machine is communicated with the methanol storage tank through a methanol conveying pipeline, and the flow regulating valve and the cut-off valve on the methanol conveying pipeline are respectively and electrically connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321382854.1U CN219783917U (en) | 2023-05-31 | 2023-05-31 | Filter system is used in production of carbazide crystallization feed liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321382854.1U CN219783917U (en) | 2023-05-31 | 2023-05-31 | Filter system is used in production of carbazide crystallization feed liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219783917U true CN219783917U (en) | 2023-10-03 |
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ID=88178665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321382854.1U Active CN219783917U (en) | 2023-05-31 | 2023-05-31 | Filter system is used in production of carbazide crystallization feed liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219783917U (en) |
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2023
- 2023-05-31 CN CN202321382854.1U patent/CN219783917U/en active Active
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