CN209997819U - Automatic kettle coating system in production process of vinyl chloride resin by micro-emulsion suspension method - Google Patents
Automatic kettle coating system in production process of vinyl chloride resin by micro-emulsion suspension method Download PDFInfo
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- CN209997819U CN209997819U CN201920458967.2U CN201920458967U CN209997819U CN 209997819 U CN209997819 U CN 209997819U CN 201920458967 U CN201920458967 U CN 201920458967U CN 209997819 U CN209997819 U CN 209997819U
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Abstract
The utility model relates to a vinyl chloride resin production system, especially hang automatic cauldron system of scribbling in emulsion method vinyl chloride resin production process a little. The kettle coating liquid storage tank is connected with the pipeline mixer, the nitrogen storage tank is connected with the pipeline mixer, the pure water storage tank is connected with the pipeline mixer, and the pipeline mixer is connected with the spray assembly at the top of the polymerization kettle; the polymerization kettle is connected with the DCS system. Conveying the kettle coating liquid into a pipeline mixer, fully atomizing by nitrogen, entering a spray assembly at the top of the polymerization kettle along an input pipeline, and spraying the spray assembly on the inner wall of the polymerization kettle; after the coating of the kettle is finished, the system carries out jacket programmed temperature rise and dries the coating kettle liquid; and (3) sending washing water to a spray head assembly at the top of the polymerization kettle by a pure water pump through a pipeline mixer, washing off redundant kettle coating liquid on the kettle wall, and finally discharging residual liquid in the kettle. Can effectively improve the kettle coating effect and reduce the labor intensity and the production consumption at the same time.
Description
Technical Field
The utility model relates to a special resin production system of kinds of chloroethylene, especially hang automatic cauldron system of scribbling in emulsion method chloroethylene resin production process a little.
Background
The wall coating system commonly used in the industry at present is directly operated manually, a self-made manual spray gun is used for manually spraying around the kettle wall before the feeding of a polymerization kettle, the polymerization kettle belongs to a long and thin kettle, dead corners exist at the top and bottom of the kettle coated by the manual spray gun, the kettle wall and stirring are uneven due to interference of human factors, the kettle wall is washed by a temporary hose manually after the kettle is coated, and the problem of incomplete washing exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an can effectively improve and scribble cauldron effect and reduce automatic cauldron system of scribbling in the method chloroethylene resin production process of hanging a little of intensity of labour and production consumption.
The utility model discloses an automatic scribble cauldron system adopts following technical scheme:
automatic kettle coating system in the production process of vinyl chloride resin by a micro-suspension emulsion method comprises a DCS system, a kettle coating liquid storage tank, a kettle coating liquid pump, a nitrogen storage tank, a pure water storage tank and a pure water pump, wherein the kettle coating liquid storage tank is connected with a pipeline mixer through the kettle coating liquid pump and a kettle coating liquid pipeline, the nitrogen storage tank is connected with the pipeline mixer through the nitrogen pipeline, the pure water storage tank is connected with the pipeline mixer through the pure water pipeline, the pipeline mixer is connected with a spray assembly at the top of a polymerization kettle through an input pipeline, and the top of the polymerization kettle is connected with the DCS system.
The preferred scheme adopted by the automatic coating kettle system is as follows:
a connecting piece in the spray head assembly at the top of the polymerization kettle is connected with a polymerization kettle shell, a rotating shaft is arranged on the connecting piece, the lower end of the rotating shaft is connected with a spray head, the spray head is arranged in the polymerization kettle shell, the upper end of the rotating shaft is connected with an end of a telescopic arm, the other end of the telescopic arm is connected with a speed reducer, the speed reducer is connected with an explosion-proof motor, the telescopic arm is arranged at the upper end of a hollow pipe, the lower end of the hollow pipe is connected with the connecting piece, and the 63.
The upper end of the spray head is of a hexahedral structure, the lower end of the spray head is of a bullet structure, and a plurality of spray holes are uniformly distributed on each surface of the spray head.
The structure of the spray head component of the polymerization kettle is two.
The automatic kettle coating method adopts the following technical scheme:
the automatic kettle coating method comprises the following steps:
1) conveying the kettle coating liquid into a pipeline mixer through a liquid coating pump, fully atomizing by nitrogen, entering a spraying assembly at the top of the polymerization kettle along an input pipeline, and uniformly spraying the kettle coating liquid on the inner wall of the polymerization kettle;
2) after the coating of the kettle is finished, closing a kettle coating liquid cut-off valve on a kettle coating liquid pipeline between the pipeline mixer and the kettle coating liquid pump, closing a nitrogen cut-off valve on a nitrogen pipeline between the nitrogen storage tank and the pipeline mixer, carrying out jacket programmed temperature rise on the system, and drying the kettle coating liquid; opening a cut-off valve on a pure water pipeline communicated between the pipeline mixer and the pure water pump, sending washing water into a spray head assembly at the top of the polymerization kettle through the pipeline mixer by the pure water pump, washing off redundant kettle coating liquid on the kettle wall, and finally discharging residual liquid in the kettle.
The preferable scheme of the coating kettle method is as follows:
the nitrogen pressure in the input pipeline is 0.1 MPa-0.5 MPa.
The using amount of the kettle coating liquid is 2-7 kg, the curing temperature after kettle coating is 50-80 ℃, the curing time after kettle coating is 4-8 min, and the washing time after kettle coating is 3-8 min.
Adopt above-mentioned system the utility model discloses, compare with prior art, its advantage lies in:
1. the original manual spraying method for coating the kettle liquid is changed into remote DCS automatic control spraying, the kettle liquid is fully atomized through high-flow-rate nitrogen at a pipeline mixer, and the kettle liquid is uniformly sprayed on the kettle wall through two spray valves at the top of the kettle.
2. The system heats the jacket of the polymerization kettle in the later stage to dry the kettle coating liquid and wash away the redundant kettle coating liquid, so that the influence of falling to reaction materials during the polymerization reaction caused by the unstable adhesion or excessive kettle coating liquid on the index of the special resin can be effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of a showerhead assembly.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings and embodiments:
automatic kettle coating system in the production process of vinyl chloride resin by a micro suspension emulsion method, which is shown in attached figures 1 and 2, wherein the system comprises a kettle coating liquid storage tank 1, a kettle coating liquid pump 2, a pure water storage tank 3, a pure water pump 4, a kettle coating liquid mass flowmeter 5, a kettle coating liquid flow regulating valve 6, a kettle coating liquid backflow regulating valve 7, a kettle coating liquid cutoff valve 8, a nitrogen cutoff valve 9, a pure water cutoff valve 10, a pipeline mixer 11, a pure water mass flowmeter 12, a pure water backflow regulating valve 13, a flow limiting orifice plate 14, a kettle coating liquid spray valve A15, a kettle coating liquid spray valve B16, a polymerization kettle 17, a nitrogen storage tank 18, an explosion-proof motor 19, a speed reducer 20, a telescopic arm 21, a rotating shaft 22, a connecting piece 23, a spray hole 24, a spray nozzle 25, a nitrogen pipeline 26, a kettle coating liquid pipeline 27, a pure water pipeline 28, an input pipeline 29, a.
In this embodiment, the coating solution flows through the coating solution storage tank 1, the coating solution pump 2, the coating solution mass flow meter 5, the coating solution flow control valve 6, the coating solution backflow control valve 7, the coating solution shut-off valve 8, and the coating solution pipeline 27, and is sufficiently atomized and mixed with nitrogen at the pipeline mixer 11, and then is accelerated by the flow restricting orifice plate 14 through the flow restricting passage, and is uniformly sprayed on the inner wall of the polymerizer 17 through the top coating solution spray valves a15 and B16.
The kettle coating liquid storage tank 1 is connected with the pipeline mixer 11 through a kettle coating liquid pump 2 and a kettle coating liquid pipeline 27, and the kettle coating liquid pipeline 27 is provided with components such as a kettle coating liquid mass flowmeter 5, a kettle coating liquid flow regulating valve 6, a kettle coating liquid reflux regulating valve 7, a kettle coating liquid cut-off valve 8 and the like and is used for controlling the actions such as the flow, the on-off and the like of the kettle coating liquid.
The storage tank 1 of the coating kettle liquid is 1.3m3The stainless steel normal pressure storage tank is provided with a stirring structure, and the kettle coating liquid pump 2 adopts a vertical multi-stage centrifugal pump.
The nitrogen storage tank 18 is connected with the pipeline mixer through a nitrogen pipeline 26, and the nitrogen pipeline 26 is provided with parts such as a nitrogen shut-off valve 9 and the like; the pure water storage tank 3 is connected with the pipeline mixer 11 through a pure water pipeline 28, and the pipeline mixer 11 is connected with the spraying assembly at the top of the polymerization kettle 17 through an input pipeline 29; the spraying component adopts a rotary electromagnetic spraying valve; the polymerizer 17 is connected to a DCS system.
The connecting pieces 23 in the spray assembly are connected with the shell at the top of the polymerization kettle 17, the number of the connecting pieces is 2, and the connecting pieces are respectively positioned at two sides of the top of the polymerization kettle 17. The connecting member 23 is provided with a rotary shaft 22, the lower end of the rotary shaft 22 is connected with a spray head 25, and the spray head 25 is disposed in the polymerization vessel 17.
The upper end of the rotating shaft 22 is connected with end of the telescopic arm 21, the other end of the telescopic arm 21 is connected with a speed reducer 20, the speed reducer 20 is connected with an explosion-proof motor 19 (Nanyang explosion-proof group company Limited, model: YB3-80M 1-4; the speed reducer 20, the telescopic arm 21 and the connecting piece 23 are manufactured by Jinzhou Longtai valve Limited company), the telescopic arm 21 is arranged at the upper end of the hollow pipe 30, the lower end of the hollow pipe 30 is connected with the connecting piece 23, the connecting piece 23 is of a flange structure, a water pipe connector 31 is arranged on the side of the hollow pipe 30 close to the lower end , the water pipe connector 31 is communicated with an input pipeline 29, the input pipeline 29 is communicated with the pipeline mixer 11, a flow-limiting orifice plate 14 is arranged on the input pipeline 29, the flow-limiting orifice plate 14 is made of a steel plate with 50 mm diameter and 4 mm thickness, and holes.
The upper end of the spray head 25 is of a hexahedral structure, the lower end of the spray head 25 is of a bullet structure, a plurality of spray holes 24 are uniformly distributed on each surface of the spray head 23 respectively, three-dimensional high-strength stainless steel spray heads are adopted by the spray head 25, the diameter is 20mm, 31 uniform spray holes 24 are formed in the spray head, the spray mode is adopted for rotary atomization spraying, the inner wall of the whole polymerization kettle 17 is covered, effective spraying and water washing effects are guaranteed, the whole system is monitored in real time by the kettle coating liquid mass flow meter 5, automatic adjustment is carried out by the kettle coating liquid flow adjusting valve 6 and the kettle coating liquid backflow adjusting valve 7, and stable and accurate kettle coating liquid flow is guaranteed.
The nitrogen gas of the coating kettle carrier gas is introduced into the system through a nitrogen pipeline 26 at the top of the polymerization kettle 17, the introduction of the carrier gas is controlled by a nitrogen shut-off valve 9, the nitrogen gas is mixed with the flowing coating kettle liquid at a pipeline mixer 11, and then the mixture is subjected to flow shrinkage pipeline acceleration through a pipeline flow-limiting orifice plate 14 until the spraying valve 15/16 of the coating kettle liquid at the top of the polymerization kettle is sprayed into the polymerization kettle 17.
In order to prevent nitrogen from being introduced into the polymerization kettle 17 under overpressure in the operation process of the kettle coating system, the kettle to be coated is vacuumized before the kettle coating system is started.
After the coating of the polymerization kettle is finished, the DCS operates to carry out jacket heating operation on the polymerization kettle 17 to be coated, the coating kettle liquid on the inner wall of the polymerization kettle 17 is dried, meanwhile, an exhaust fan and a pneumatic valve on the top of the polymerization kettle 17 are opened, redundant nitrogen is discharged, after the temperature is raised to a specified temperature, a jacket hot water valve is closed, and after the temperature is maintained for 10 minutes, the temperature is reduced.
After the drying operation of the coating polymerizer 17 is completed, the coating polymerizer is rinsed by the system pure water line 28.
The washing water flows through equipment and pipelines such as a pure water tank 3, a pure water pump 4, a pure water cut-off valve 10, a pure water mass flow meter 12, a pure water backflow regulating valve 13 and the like, and washes the wall of the polymerization kettle 17 through a pipeline mixer 10, a flow limiting orifice plate 14 to a top coating kettle liquid spraying valve 15/16.
The flow of the washing water of the system is monitored in real time by a pure water mass flow meter 12 and is automatically adjusted by a pure water backflow adjusting valve 13, so that the flow of the washing water is stable and accurate.
After the completion of the washing, the bottom plug valve of the polymerizer 17 was opened, and the coating solution washing water was discharged.
Reaction method example 1:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 4 kg; time of washing water after automatic kettle coating: 5 min/kettle; curing time after coating the pot: 5 min/kettle; curing temperature after coating the pot: and 65 ℃. The trial production work was carried out in the experiment 8 pot, and the results are shown in Table 1.
Table 1 reaction method example 1 test production effect table
Reaction method example 2:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 6 kg; time of washing water after automatic kettle coating: 5 min/kettle; curing time after coating the pot: 5 min/kettle; curing temperature after coating the pot: and 65 ℃. The trial production work was carried out in the experiment 8 pot, and the results are shown in Table 2.
Table 2 reaction method example 2 test production effect table
Reaction method example 3:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 5 kg; time of washing water after automatic kettle coating: 4 min/kettle; curing time after coating the pot: 5 min/kettle; curing temperature after coating the pot: and 65 ℃. The trial production work was carried out in the experiment 8 pot, and the results are shown in Table 3.
Table 3 reaction method example 3 test production effect table
Reaction method example 4:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 5 kg; time of washing water after automatic kettle coating: 6 min/kettle; curing time after coating the pot: 5 min/kettle; curing temperature after coating the pot: and 65 ℃. The trial production work was carried out in a total of 8 reactors, and the results are shown in Table 4.
Table 4 reaction method example 2 test production effect table
Reaction method example 5:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 5 kg; time of washing water after automatic kettle coating: 5 min/kettle; curing time after coating the pot: 4 min/kettle; curing temperature after coating the pot: and 65 ℃. The trial production work was carried out in the experiment 8 pot, and the results are shown in Table 5.
Table 5 reaction method example 5 test production effect table
Reaction method example 6:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 5 kg; time of washing water after automatic kettle coating: 5 min/kettle; curing time after coating the pot: 6 min/kettle; curing temperature after coating the pot: and 65 ℃. The trial production work was carried out in the experiment 8 pot, and the results are shown in Table 6.
Table 6 reaction method example 6 test production effect table
Reaction method example 7:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 6 kg; time of washing water after automatic kettle coating: 5 min/kettle; curing time after coating the pot: 6 min/kettle; curing temperature after coating the pot: at 60 ℃. The trial production work was carried out in the experiment 8 pot, and the results are shown in Table 7.
Table 7 reaction method example 7 test production effect table
Reaction method example 8:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 6 kg; time of washing water after automatic kettle coating: 5 min/kettle; curing time after coating the pot: 6 min/kettle; curing temperature after coating the pot: at 70 ℃. The trial production work was carried out in the experiment 8 pot, and the results are shown in Table 8.
Table 8 reaction method example 8 test production effect table
Reaction method example 9:
selecting the amount of the automatic kettle coating process parameter of the kettle coating liquid: 5 kg; time of washing water after automatic kettle coating: 5 min/kettle; curing time after coating the pot: 5 min/kettle; curing temperature after coating the pot: and 65 ℃. The trial production work was carried out in the experiment 8 pot, and the results are shown in Table 9.
Table 9 reaction method example 9 test production effect table
The experimental production results of the 9 reaction method embodiments are combined with the actual production and consumption of machine materials, energy sources and the like, the preferred automatic kettle coating process parameters are that the using amount of the kettle coating liquid is 5kg, the time of flushing water after automatic kettle coating is 5 min/kettle, the curing time after kettle coating is 6 min/kettle, the curing temperature after kettle coating is 65 ℃, the wall coating effect of two sprays through the kettle top is obviously improved compared with that of manual wall coating, the wall coating liquid is uniformly distributed, the slag removing amount in the kettle cleaning process in the discharging process is obviously reduced, and bags of slag materials are averagely reduced in each kettle.
Through the research and development of the automatic kettle coating technology, the kettle coating effect is improved, the using amount of the kettle coating liquid is reduced, 5 tons of the kettle coating liquid is consumed by the manual kettle coating every month, the consumed kettle coating liquid is reduced to 2 tons after the automatic kettle coating is implemented, the slag cleaning amount in the kettle cleaning process in the discharging process is obviously reduced, bags of slag particles are averagely reduced in each kettle, and the change of the waste amount is shown in a table 10.
TABLE 10 comparison of the amount of waste before and after the automatic coating of the kettle
Besides, besides the tangible benefits, the using amount of the coating kettle liquid is reduced, the whiteness of the resin can be improved, the average value of 87 before modification is improved to be more than 89, the quality of the resin is improved, the coating kettle effect is improved, the labor intensity of workers for kettle cleaning and the like is greatly reduced, productive waste is reduced, 6 bags are reduced in average days for removing the slag materials in the trench, each bag of trench is reduced into 0.03 ton of finished products, about 62 tons of normal resin can be increased every year under the normal production condition, the using amount of the coating kettle liquid of each kettle of the manual coating kettle before modification is 15 kg/kettle, and is reduced to 5 kg/kettle after modification, so 34 tons of the coating kettle liquid are saved every year, and is increased.
Claims (4)
- An automatic kettle coating system in the production process of vinyl chloride resin by micro-suspension emulsion methods comprises a DCS system, a kettle coating liquid storage tank, a kettle coating liquid pump, a nitrogen storage tank, a pure water storage tank and a pure water pump, and is characterized in that the kettle coating liquid storage tank is connected with a pipeline mixer through the kettle coating liquid pump and a kettle coating liquid pipeline, the nitrogen storage tank is connected with the pipeline mixer through a nitrogen pipeline, the pure water storage tank is connected with the pipeline mixer through a pure water pipeline, the pipeline mixer is connected with a spray assembly at the top of a polymerization kettle through an input pipeline, and the polymerization kettle is connected with the DCS system.
- 2. The automatic kettle coating system in the production process of vinyl chloride resin by the micro-suspension emulsion method as claimed in claim 1, wherein a connecting piece in a spray head assembly at the top of the polymerization kettle is connected with a polymerization kettle shell, a rotating shaft is arranged on the connecting piece, the lower end of the rotating shaft is connected with the spray head, the spray head is arranged in the polymerization kettle shell, the upper end of the rotating shaft is connected with end of a telescopic arm, the other end of the telescopic arm is connected with a speed reducer, the speed reducer is connected with an explosion-proof motor, the telescopic arm is arranged at the upper end of a hollow pipe, the lower end of the hollow pipe is connected with the connecting piece, and.
- 3. The automatic pot coating system in the production process of vinyl chloride resin by the micro-suspension emulsion method according to claim 1 or 2, wherein: the upper end of the spray head is of a hexahedral structure, the lower end of the spray head is of a bullet structure, and a plurality of spray holes are uniformly distributed on each surface of the spray head.
- 4. The automatic pot coating system in the production process of vinyl chloride resin by the micro-suspension emulsion method according to claim 1 or 2, wherein: the structure of the spray head component of the polymerization kettle is two.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920458967.2U CN209997819U (en) | 2019-04-05 | 2019-04-05 | Automatic kettle coating system in production process of vinyl chloride resin by micro-emulsion suspension method |
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| CN201920458967.2U CN209997819U (en) | 2019-04-05 | 2019-04-05 | Automatic kettle coating system in production process of vinyl chloride resin by micro-emulsion suspension method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109876951A (en) * | 2019-04-05 | 2019-06-14 | 唐山三友氯碱有限责任公司 | Kettle system and method is applied automatically in micro- outstanding newborn method vinyl chloride resin production process |
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2019
- 2019-04-05 CN CN201920458967.2U patent/CN209997819U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109876951A (en) * | 2019-04-05 | 2019-06-14 | 唐山三友氯碱有限责任公司 | Kettle system and method is applied automatically in micro- outstanding newborn method vinyl chloride resin production process |
| CN109876951B (en) * | 2019-04-05 | 2024-05-31 | 唐山三友氯碱有限责任公司 | Automatic kettle coating system and method in vinyl chloride resin production process by micro-suspension emulsion method |
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