CN220834902U - PVC retrieves monomer tail exhaust and retrieves monitoring devices - Google Patents
PVC retrieves monomer tail exhaust and retrieves monitoring devices Download PDFInfo
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- CN220834902U CN220834902U CN202322298786.7U CN202322298786U CN220834902U CN 220834902 U CN220834902 U CN 220834902U CN 202322298786 U CN202322298786 U CN 202322298786U CN 220834902 U CN220834902 U CN 220834902U
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- gas
- pipeline
- liquid separation
- recovery
- alkali
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- 239000000178 monomer Substances 0.000 title claims abstract description 20
- 238000012806 monitoring device Methods 0.000 title claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000001301 oxygen Substances 0.000 claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 31
- 238000011084 recovery Methods 0.000 claims abstract description 27
- 239000007787 solid Substances 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000004064 recycling Methods 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims 4
- 238000005406 washing Methods 0.000 abstract description 29
- 229920000915 polyvinyl chloride Polymers 0.000 abstract description 12
- 239000004800 polyvinyl chloride Substances 0.000 abstract description 12
- 239000007791 liquid phase Substances 0.000 abstract description 5
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to the technical field of chlor-alkali industry, in particular to a PVC (polyvinyl chloride) recovery monomer tail gas recovery monitoring device which comprises a recovery condenser, a gas-liquid separation tank, an online oxygen meter, a solid alkali dryer and an alkaline washing tower, wherein a tail gas exhaust pipeline is fixedly communicated between an outlet at the upper part of the recovery condenser and an inlet of the gas-liquid separation tank, a first alkaline washing tower pipeline is fixedly communicated between an outlet at the top of the gas-liquid separation tank and the alkaline washing tower, a detection gas pipeline is fixedly communicated between an outlet at the middle part of the gas-liquid separation tank and an inlet of the solid alkali dryer, an oxygen meter pipeline is fixedly communicated between an outlet of the solid alkali dryer and the online oxygen meter, and a second alkaline washing tower pipeline is fixedly communicated between an outlet of the online oxygen meter and the first alkaline washing tower pipeline. The utility model has reasonable and compact structure and convenient use, can effectively prevent the liquid phase of the tail gas from being brought to the alkaline washing tower, and detects the oxygen content of the tail gas in real time, and has the characteristics of safety, labor saving, simplicity and high efficiency.
Description
Technical Field
The utility model relates to the technical field of chlor-alkali industry, in particular to a PVC recycling monomer tail exhaust recycling monitoring device.
Background
The domestic polyvinyl chloride resin production process mainly adopts an ethylene chlorination method and a calcium carbide method. The two production processes are the same except the purification of raw materials and the synthesis process of vinyl chloride in the production process, and the fractional purification polymerization process of vinyl chloride is the same, so that fractional tail gas containing high-concentration vinyl chloride is generated in the process. In the process of polymerization production of polyvinyl chloride, about 80 percent of vinyl chloride monomer participates in reaction, about 20 percent of vinyl chloride monomer does not participate in reaction, the part of vinyl chloride monomer needs to be condensed and recycled to a recycled monomer storage tank through a recycling condenser, non-condensable gas in the part of vinyl chloride monomer is conveyed to an upstream alkaline washing tower through a tail exhaust pipeline to be recycled, and tail exhaust gas is directly conveyed to the upstream alkaline washing tower through the pipeline, so that liquid carrying phenomenon exists. In addition, the oxygen content of the tail gas needs to be detected in the recovery process, at present, the tail gas is manually sampled, after the oxygen content of the tail gas exceeds the standard, a valve needs to be manually opened and closed to be cut to be emptied, and the operation has postponement.
Disclosure of Invention
The utility model provides a PVC recycling monomer tail exhaust recycling monitoring device, which overcomes the defects of the prior art and can effectively solve the problems of complex detection operation of liquid carrying and oxygen content of the existing recycling monomer tail exhaust.
The technical scheme of the utility model is realized by the following measures: the utility model provides a PVC retrieves monomer tail exhaust gas and retrieves monitoring devices, including retrieving the condenser, the gas-liquid separation jar, online oxygen meter, the solid alkali desicator, the alkaline wash tower, there is the tail exhaust line in the fixed intercommunication between recovery condenser upper portion export and the gas-liquid separation jar import, there is first alkali wash tower pipeline in fixed intercommunication between gas-liquid separation jar top export and the alkaline wash tower, there is the detection gas pipeline in fixed intercommunication between gas-liquid separation jar middle part export and the solid alkali desicator import, there is the oxygen pipeline in fixed intercommunication between solid alkali desicator export and the online oxygen meter, there is the second alkali wash tower pipeline in fixed intercommunication between online oxygen meter export and the first alkali wash tower pipeline, fixed intercommunication has the evacuation pipeline on the first alkali wash tower pipeline between second alkali wash tower pipeline and the gas-liquid separation jar, fixed mounting has automatic air release valve on the evacuation pipeline, there is alkali wash tower automatic valve in the fixed mounting on the first alkali wash tower pipeline between second alkali wash tower pipeline and the alkaline wash tower.
The following are further optimizations and/or improvements to the above-described inventive solution:
The PVC recycling monomer tail exhaust recycling monitoring device further comprises a DCS controller, and the online oxygen meter, the automatic valve of the dealkalization tower and the automatic vent valve are all electrically connected with the DCS controller.
And an adjusting valve is fixedly arranged on the first alkali-removing washing tower pipeline between the emptying pipeline and the gas-liquid separation tank.
The bottom outlet of the gas-liquid separation tank is fixedly communicated with a recovery tank removing pipeline.
The utility model has reasonable and compact structure and convenient use, can effectively prevent the liquid phase of the tail gas from being brought to the alkaline washing tower, and detects the oxygen content of the tail gas in real time, and has the characteristics of safety, labor saving, simplicity and high efficiency.
Drawings
FIG. 1 is a schematic diagram of the process flow of the utility model.
The codes in the drawings are respectively: 1 is a recovery condenser, 2 is a gas-liquid separation tank, 3 is an online oxygen meter, 4 is a solid alkali dryer, 5 is an alkali washing tower, 6 is a tail exhaust pipeline, 7 is a first alkali washing tower pipeline, 8 is a detection gas pipeline, 9 is an oxygen measurement pipeline, 10 is a second alkali washing tower pipeline, 11 is an emptying pipeline, 12 is an automatic emptying valve, 13 is an alkali washing tower automatic valve, 14 is a DCS controller, 15 is a regulating valve, and 16 is a recovery tank pipeline.
Detailed Description
The present utility model is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present utility model.
In the present utility model, unless otherwise specified, the devices and apparatuses used are all known and commonly used in the art.
In the present utility model, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The utility model is further described below with reference to examples and figures:
Example 1: as shown in figure 1, the monitoring device for recovering the tail exhaust gas of the PVC recovery monomer comprises a recovery condenser 1, a gas-liquid separation tank 2, an online oxygen meter 3, a solid alkali dryer 4 and an alkali washing tower 5, wherein a tail exhaust pipeline 6 is fixedly communicated between the outlet of the upper part of the recovery condenser 1 and the inlet of the gas-liquid separation tank 2, a first alkali washing tower pipeline 7 is fixedly communicated between the outlet of the top of the gas-liquid separation tank 2 and the inlet of the alkali washing tower 5, a detection gas pipeline 8 is fixedly communicated between the outlet of the middle part of the gas-liquid separation tank 2 and the inlet of the solid alkali dryer 4, an oxygen meter pipeline 9 is fixedly communicated between the outlet of the solid alkali dryer 4 and the online oxygen meter 3, a second alkali washing tower pipeline 10 is fixedly communicated between the outlet of the online oxygen meter 3 and the first alkali washing tower pipeline 7, an exhaust pipeline 11 is fixedly communicated on the first alkali washing tower pipeline 7 between the second alkali washing tower pipeline 10 and the gas-liquid separation tank 2, an automatic air release valve 12 is fixedly arranged on the exhaust pipeline 11, and an alkali washing valve 13 is fixedly arranged on the first alkali washing tower 7 between the second alkali washing tower 10 and the alkali washing tower 5.
The PVC recycling monomer tail gas recycling monitoring device can be further optimized or/and improved according to actual needs:
Example 2: which differs from example 1 in that: as shown in figure 1, the device also comprises a DCS controller 14, and the online oxygen meter 3, the automatic dealkalization tower valve 13 and the automatic emptying valve 12 are electrically connected with the DCS controller 14.
Example 3: which differs from examples 1 to 2 in that: as shown in fig. 1, a regulating valve 15 is fixedly arranged on the first dealkalization tower pipeline 7 between the emptying pipeline 11 and the gas-liquid separation tank 2.
Example 4: which differs from examples 1 to 3 in that: as shown in fig. 1, the bottom outlet of the gas-liquid separation tank 2 is fixedly communicated with a recovery tank removing pipeline 16.
According to the requirement, valves, thermometers, pressure gauges and the like which can enable the PVC recovery monomer tail exhaust gas recovery monitoring device to normally operate are fixedly arranged on each pipeline. The model of the DCS controller 14 may be a CS3000 controller manufactured by the company of the cross river of japan.
The non-condensable gas discharged from the recovery condenser 1 enters the gas-liquid separation tank 2 through a tail exhaust pipeline 6, and the liquid phase part is discharged from the bottom of the gas-liquid separation tank 2 to a recovery tank pipeline 16; the gas phase part is discharged from the top of the gas-liquid separation tank 2 and enters the alkaline washing tower 5 through a first alkaline washing tower removing pipeline 7. The middle part of the gas-liquid separation tank 2 is connected with detection gas, the detection gas enters an online oxygen meter 3 for analysis after moisture is removed by a solid alkali dryer 4, real-time data are transmitted to a DCS controller 14, when the oxygen content is more than 2%, an automatic valve 13 of the dealkalization tower is automatically closed, an automatic emptying valve 12 is opened, and when the oxygen content is less than 2%, the automatic emptying valve 12 is automatically closed, and the automatic valve 13 of the dealkalization tower is automatically opened. The utility model is provided with the gas-liquid separation tank 2, can effectively avoid the tail exhaust gas from bringing the liquid phase to the alkaline washing tower 5, and realizes the automatic control of the opening and closing of the valve according to the oxygen content.
The utility model has reasonable and compact structure and convenient use, can effectively prevent the liquid phase of the tail gas from being brought to the alkaline washing tower, and detects the oxygen content of the tail gas in real time, and has the characteristics of safety, labor saving, simplicity and high efficiency.
The technical characteristics form the embodiment of the utility model, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (5)
1. The utility model provides a PVC retrieves monomer tail exhaust gas and retrieves monitoring devices, a serial communication port comprises a recovery condenser, the gas-liquid separation jar, on-line oxygen meter, solid alkali dryer, the alkali wash tower, the fixed intercommunication has the tail exhaust line between recovery condenser upper portion export and the gas-liquid separation jar import, fixed intercommunication has first alkali wash tower pipeline between gas-liquid separation jar top export and the alkali wash tower, fixed intercommunication has the detection gas pipeline between gas-liquid separation jar middle part export and the solid alkali dryer import, fixed intercommunication has the oxygen pipeline between solid alkali dryer export and the on-line oxygen meter, fixed intercommunication has second alkali wash tower pipeline between on-line oxygen meter export and the first alkali wash tower pipeline, fixed intercommunication has the evacuation pipeline on the first alkali wash tower pipeline between second alkali wash tower pipeline and the gas-liquid separation jar, fixed mounting has automatic emptying valve on the evacuation pipeline, fixed mounting has alkali wash tower automatic valve on the first alkali wash tower pipeline between second alkali wash tower pipeline and the alkali wash tower.
2. The device for monitoring the exhaust gas recovery of the PVC recovery unit tail according to claim 1, further comprising a DCS controller, wherein the on-line oxygen meter, the automatic valve of the dealkalization tower and the automatic vent valve are all electrically connected with the DCS controller.
3. The PVC recycling monomer tail gas recycling monitoring apparatus according to claim 1 or 2, wherein the first dealkalizing scrubber line between the evacuation line and the gas-liquid separation tank is fixedly provided with a regulating valve.
4. The device for monitoring the tail gas recovery of the PVC recovery monomer according to claim 1 or 2, wherein the outlet at the bottom of the gas-liquid separation tank is fixedly communicated with a pipeline for removing the recovery tank.
5. The device for monitoring the tail gas recovery of the PVC recovery monomer according to claim 3, wherein the outlet at the bottom of the gas-liquid separation tank is fixedly communicated with a pipeline for removing the recovery tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322298786.7U CN220834902U (en) | 2023-08-25 | 2023-08-25 | PVC retrieves monomer tail exhaust and retrieves monitoring devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322298786.7U CN220834902U (en) | 2023-08-25 | 2023-08-25 | PVC retrieves monomer tail exhaust and retrieves monitoring devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220834902U true CN220834902U (en) | 2024-04-26 |
Family
ID=90771500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322298786.7U Active CN220834902U (en) | 2023-08-25 | 2023-08-25 | PVC retrieves monomer tail exhaust and retrieves monitoring devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220834902U (en) |
-
2023
- 2023-08-25 CN CN202322298786.7U patent/CN220834902U/en active Active
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