CN104262598A - Online polyester production conversion equipment and production conversion method adopting same - Google Patents
Online polyester production conversion equipment and production conversion method adopting same Download PDFInfo
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- CN104262598A CN104262598A CN201410542068.2A CN201410542068A CN104262598A CN 104262598 A CN104262598 A CN 104262598A CN 201410542068 A CN201410542068 A CN 201410542068A CN 104262598 A CN104262598 A CN 104262598A
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Abstract
The invention relates to online polyester production conversion equipment and a production conversion method adopting the same. By means of an additive blending tank arranged in the equipment, required additive slurry is conveniently prepared in advance according to a production conversion instruction before the equipment is started; further, the additive slurry is prepared in advance and is not required to be temporarily prepared in a polymerization blending tank, so that the liquid level of the polymerization blending tank can be reduced to be quite low and even lower than 1%, the flow volume of the slurry is reduced to the utmost extent, and the transitional material yield in the production conversion process is reduced; and the concentration of an additive in an esterification kettle can be adjusted rapidly by the slurry prepared in the additive blending tank in advance, so that the online production conversion is rapidly realized while the normal and stable production is guaranteed, and the transition time of the online production conversion is shortened. According to the method, the process control is simple, and the industrialization is easy to realize.
Description
Technical field
The present invention relates to polyester to change the line of production online technical field, specifically refer to that a kind of polyester is changed the line of production equipment and utilize this equipment to carry out the method for changing the line of production online.
Background technology
Along with being growing more intense of production of polyester producer competition, polyester product, just towards multi items future development, in order to meet the need of market, requires that PET manufacturer changes the line of production frequently.For PET device, two kinds of modes of having changed the line of production: is first stop production, and cleaning system is changed the line of production again; Two is change the line of production online.The former cost is high, and the time of needs is long, can produce the start-stop car material of non-quantitative because of the difference of operant level; There is not stopping production in the latter, the production switch time is short, rapider to market response, is conducive to increasing the handiness of producing, increases economic efficiency.But the amount of the Transition Materials of middle generation of changing the line of production online is not easily estimated.
Change the line of production online and increase the process of additive and minimizing additive, this directly results in the prolongation of transit time and the generation of Transition Materials.Traditional PET production unit comprises polymerization slurry commanding tank, esterifying kettle, polycondensation vessel three assemblies; wherein; polymerization slurry commanding tank and esterifying kettle are continuous stir reactors; with slurry stable for ensureing; the not loss under centrifugal action because slurry liquid level is too low of protection agitator; about general first reduction polymerization slurry commanding tank liquid level to 50%, then increased by volume pump or reduce additive level.In above process, because polymerization slurry commanding tank is continuous stir reactor, in polymerization slurry commanding tank, remaining slurry is more, in polymerization slurry commanding tank and esterifying kettle, additive level increases or is reduced to set(ting)value and needs considerable time, therefore just Transition Materials is created in the continuous change procedure of additive level, for the polyester equipment of present single line production capacity 25 ~ 500,000 tons/year, once change the line of production and will produce 400 ~ 600 tons of Transition Materials.Change the line of production online in process, the generation of Transition Materials has had a strong impact on the economic benefit of enterprise.
Therefore, for the instrument and supplies of changing the line of production online of current polyester, be badly in need of improving.
Summary of the invention
First technical problem to be solved by this invention is the present situation for prior art, provides a kind of polyester to change the line of production online equipment, and this equipment is used for the generation effectively can shortened transit time, reduce Transition Materials of changing the line of production online of polyester.
Second technical problem to be solved by this invention is the present situation for prior art, provide a kind of utilize above-mentioned polyester online the equipment of changing the line of production carry out the method for changing the line of production, the method technology controlling and process is simple, be easy to realize industrialization.
The present invention solves the technical scheme that above-mentioned first technical problem adopt: a kind of polyester is changed the line of production equipment online, it is characterized in that comprising
Additive slurry commanding tank, opening for feed is connected with an additive feed pot and has the first agitator, and discharge port has the first weighing balance;
Phthalic acid feed pot, discharge port has the second weighing balance;
Additive batch tank, has the second agitator;
Polycondensation vessel, has discharge port and the 3rd agitator;
Esterifying kettle, discharge end is connected with the opening for feed of aforesaid polycondensation vessel and has the 4th agitator; And
Polymerization slurry commanding tank, there is the 5th agitator, the opening for feed of this polymerization slurry commanding tank is connected with the discharge port of the discharge port of aforementioned additive slurry commanding tank, the discharge port of phthalic acid feed pot and additive batch tank respectively, and the discharge port of this polymerization slurry commanding tank is connected with the opening for feed of aforementioned esterifying kettle.
As improvement, the discharge port of the discharge port of described additive slurry commanding tank, the discharge port of phthalic acid feed pot and additive batch tank is connected respectively by the opening for feed of thrust-augmenting nozzle with polymerization slurry commanding tank, and described thrust-augmenting nozzle is provided with bleeder valve.
As preferably, the volume of described additive slurry commanding tank is 10% ~ 100% of polymerization slurry commanding tank volume.
The present invention solves the technical scheme that above-mentioned second technical problem adopt: a kind of utilize above-mentioned polyester online the equipment of changing the line of production carry out the method for changing the line of production, it is characterized in that comprising the following steps:
(1) before equipment of changing the line of production online runs in 1h ~ 10h, desired additives is added in additive feed pot, enter in additive slurry commanding tank after preliminary mixing and be stirred to evenly;
(2) to change the line of production online opening of device, reduce polymerization slurry commanding tank liquid level to being not more than 30% of tank body volume, in 10min ~ 45min by the slurry transferring that configures in described for step (1) additive slurry commanding tank to being polymerized slurry commanding tank, simultaneously, in polymerization slurry commanding tank, corresponding phthalic acid and ethylene glycol is supplemented respectively by phthalic acid feed pot and additive batch tank, the add-on of phthalic acid and ethylene glycol with change the line of production before be consistent, carry out with slurry;
(3), after the concentration of slurry all reaches setting concentration in slurry commanding tank to be polymerized and esterifying kettle, continue with slurry according to this setting concentration, changed the line of production.
In such scheme, the additive described in step (1) is at least one in functional additive, catalyzer, toning agent and thermo-stabilizer.
As preferably, the additive described in step (1) accounts for 30% ~ 90% of additive slurry commanding tank volume.
The concentration of being polymerized slurry in slurry commanding tank and esterifying kettle described in step (3) reaches setting concentration in 5h ~ 10h.
Compared with prior art, the invention has the advantages that: the feature of change the line of production for polyester process transitions time length and a large amount of Transition Materials of easy generation, be provided with the equipment being specifically designed to polyester and changing the line of production online, in this equipment, the additive slurry according to the pre-configured needs of instruction of changing the line of production before opening of device of changing the line of production is convenient in the setting of additive slurry commanding tank; And, due to pre-configured additive slurry, and without the need to provisional configuration in polymerization slurry commanding tank, therefore, the liquid level of polymerization slurry commanding tank can be made to drop to very low, even lower than 1%, thus decrease the volume of material in slurry to greatest extent, and then reduce the generation of Transition Materials in process of changing the line of production; Slurry pre-configured in additive slurry commanding tank can the concentration of additive in quick adjustment esterifying kettle, avoid causing the problem that transit time is long and generation Transition Materials is many because of the fluctuation of concentration of additive slurry, while guarantee normal table is produced, reach the object that quick realization is changed the line of production online, reduce the transit time of changing the line of production online; Product change method technology controlling and process of the present invention is simple, be easy to realize industrialization.
Accompanying drawing explanation
Fig. 1 is the structural representation of equipment of changing the line of production online in the embodiment of the present invention 1.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.Following embodiment is all described the process of changing the line of production using m-phthalic acid as functional additive.
Embodiment 1:
As shown in Figure 1, the equipment of changing the line of production online of the present embodiment comprises additive slurry commanding tank 1, phthalic acid feed pot 2, additive batch tank 3, polymerization slurry commanding tank 4, esterifying kettle 5 and polycondensation vessel 6, and the volume of additive slurry commanding tank 1 is 10% ~ 100% of polymerization slurry commanding tank 4 volume.The opening for feed of additive slurry commanding tank 1 is connected with an additive feed pot 11 and has the first agitator 12, and discharge port has the first weighing balance 13; The discharge port of phthalic acid feed pot 2 has the second weighing balance 21, there is in additive batch tank 3 second agitator 31, polycondensation vessel 6 has discharge port 61 and the 3rd agitator 62, the discharge end of esterifying kettle 5 is connected with the opening for feed of polycondensation vessel 6 and has the 4th agitator 51, in polymerization slurry commanding tank 4, there is the 5th agitator 41, and the opening for feed of polymerization slurry commanding tank 4 is connected with the discharge port of the discharge port of additive slurry commanding tank 1, the discharge port of phthalic acid feed pot 2 and additive batch tank 3 respectively, the discharge port of polymerization slurry commanding tank 4 is connected with the opening for feed of esterifying kettle 5.The discharge port of the discharge port of additive slurry commanding tank 4, the discharge port of phthalic acid feed pot 2 and additive batch tank 3 is connected respectively by the opening for feed of thrust-augmenting nozzle 100 with polymerization slurry commanding tank 4, and thrust-augmenting nozzle 100 is provided with bleeder valve.
Use above-mentioned equipment of changing the line of production online to m-phthalic acid content process of changing the line of production from low to high, the online product change method of the present embodiment comprises the following steps:
(1) before changing the line of production in 1h, configure 10 tons of mixed slurries by additive feed pot 11 and additive slurry commanding tank 1, by mass, m-phthalic acid in this mixed slurry: terephthalic acid=3:7, stirs 1h;
(2) to change the line of production opening of device, reduce polymerization slurry commanding tank 4 liquid level to 1% of tank body volume, the mixed slurry configured in step (1) is delivered in 30min in polymerization slurry commanding tank 4, simultaneously, in polymerization slurry commanding tank 4, supplement terephthalic acid and ethylene glycol respectively by phthalic acid feed pot 2 and additive batch tank 3, the add-on of terephthalic acid and ethylene glycol with change the line of production before be consistent;
(3) in 6h post polymerization slurry commanding tank 4, esterifying kettle 5, m-phthalic acid concentration all arrives setting concentration, continues according to the concentration of this setting m-phthalic acid with slurry, has changed the line of production.
Embodiment 2:
Use the equipment of changing the line of production online of embodiment 1 to m-phthalic acid content process of changing the line of production from high to low, the online product change method of the present embodiment comprises the following steps:
(1) before changing the line of production in 3h, configure 10 tons of mixed slurries by additive feed pot 11 and additive slurry commanding tank 1, by mass, m-phthalic acid in this mixed slurry: terephthalic acid=6:4, stirs 5h;
(2) to change the line of production opening of device, reduce polymerization slurry commanding tank 4 liquid level to 5% of tank body volume, the mixed slurry configured in step (1) is delivered in 10min in polymerization slurry commanding tank 4, simultaneously, in polymerization slurry commanding tank 4, supplement terephthalic acid and ethylene glycol respectively by phthalic acid feed pot 2 and additive batch tank 3, the add-on of terephthalic acid and ethylene glycol with change the line of production before be consistent;
(3) in 5h post polymerization slurry commanding tank 4, esterifying kettle 5, m-phthalic acid concentration all arrives setting concentration, continues according to the concentration of this setting m-phthalic acid with slurry, has changed the line of production.
Embodiment 3:
Use the equipment of changing the line of production online of embodiment 1 to m-phthalic acid content process of changing the line of production from low to high, the online product change method of the present embodiment comprises the following steps:
(1) before changing the line of production in 8h, configure 18 tons of mixed slurries by additive feed pot 11 and additive slurry commanding tank 1, by mass, m-phthalic acid in this mixed slurry: terephthalic acid=2:8, stirs 10h;
(2) to change the line of production opening of device, reduce polymerization slurry commanding tank 4 liquid level to 10% of tank body volume, the mixed slurry configured in step (1) is delivered in 45min in polymerization slurry commanding tank 4, simultaneously, in polymerization slurry commanding tank 4, supplement terephthalic acid and ethylene glycol respectively by phthalic acid feed pot 2 and additive batch tank 3, the add-on of terephthalic acid and ethylene glycol with change the line of production before be consistent;
(3) in 8h post polymerization slurry commanding tank 4, esterifying kettle 5, m-phthalic acid concentration all arrives setting concentration, continues according to the concentration of this setting m-phthalic acid with slurry, has changed the line of production.
Embodiment 4:
Use the equipment of changing the line of production online of embodiment 1 to m-phthalic acid content process of changing the line of production from high to low, the online product change method of the present embodiment comprises the following steps:
(1) before changing the line of production, configure 30 tons of mixed slurries by additive feed pot 11 and additive slurry commanding tank 1, by mass, m-phthalic acid in this mixed slurry: terephthalic acid=7:3, stirs 10h;
(2) to change the line of production opening of device, reduce polymerization slurry commanding tank 4 liquid level to 30% of tank body volume, the mixed slurry configured in step (1) is delivered in 25min in polymerization slurry commanding tank 4, simultaneously, in polymerization slurry commanding tank 4, supplement terephthalic acid and ethylene glycol respectively by phthalic acid feed pot 2 and additive batch tank 3, the add-on of terephthalic acid and ethylene glycol with change the line of production before be consistent;
(3) in 10h post polymerization slurry commanding tank 4, esterifying kettle 5, m-phthalic acid concentration all arrives setting concentration, continues according to the concentration of this setting m-phthalic acid with slurry, has changed the line of production.
Claims (7)
1. polyester is changed the line of production an equipment online, it is characterized in that comprising
Additive slurry commanding tank, opening for feed is connected with an additive feed pot and has the first agitator, and discharge port has the first weighing balance;
Phthalic acid feed pot, discharge port has the second weighing balance;
Additive batch tank, has the second agitator;
Polycondensation vessel, has discharge port and the 3rd agitator;
Esterifying kettle, discharge end is connected with the opening for feed of aforesaid polycondensation vessel and has the 4th agitator; And
Polymerization slurry commanding tank, there is the 5th agitator, the opening for feed of this polymerization slurry commanding tank is connected with the discharge port of the discharge port of aforementioned additive slurry commanding tank, the discharge port of phthalic acid feed pot and additive batch tank respectively, and the discharge port of this polymerization slurry commanding tank is connected with the opening for feed of aforementioned esterifying kettle.
2. polyester according to claim 1 is changed the line of production equipment online, it is characterized in that: the discharge port of the discharge port of described additive slurry commanding tank, the discharge port of phthalic acid feed pot and additive batch tank is connected respectively by the opening for feed of thrust-augmenting nozzle with polymerization slurry commanding tank, and described thrust-augmenting nozzle is provided with bleeder valve.
3. polyester according to claim 2 is changed the line of production equipment online, it is characterized in that: the volume of described additive slurry commanding tank is 10% ~ 100% of polymerization slurry commanding tank volume.
4. utilize polyester described in arbitrary claim in claim 1 ~ 3 online the equipment of changing the line of production carry out a method of changing the line of production, it is characterized in that comprising the following steps:
(1) before equipment of changing the line of production online runs in 1h ~ 10h, desired additives is added in additive feed pot, enter in additive slurry commanding tank after preliminary mixing and be stirred to evenly;
(2) to change the line of production online opening of device, reduce polymerization slurry commanding tank liquid level to being not more than 30% of tank body volume, in 10min ~ 45min by the slurry transferring that configures in described for step (1) additive slurry commanding tank to being polymerized slurry commanding tank, simultaneously, in polymerization slurry commanding tank, corresponding phthalic acid and ethylene glycol is supplemented respectively by phthalic acid feed pot and additive batch tank, the add-on of phthalic acid and ethylene glycol with change the line of production before be consistent, carry out with slurry;
(3), after the concentration of slurry all reaches setting concentration in slurry commanding tank to be polymerized and esterifying kettle, continue with slurry according to this setting concentration, changed the line of production.
5. product change method according to claim 4, is characterized in that: the additive described in step (1) is at least one in functional additive, catalyzer, toning agent and thermo-stabilizer.
6. the product change method according to claim 4 or 5, is characterized in that: the additive described in step (1) accounts for 30% ~ 90% of additive slurry commanding tank volume.
7. the product change method according to claim 4 or 5, is characterized in that: the concentration of being polymerized slurry in slurry commanding tank and esterifying kettle described in step (3) reaches setting concentration in 5h ~ 10h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410542068.2A CN104262598B (en) | 2014-10-14 | 2014-10-14 | The method that polyester is changed the line of production online |
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| CN201410542068.2A CN104262598B (en) | 2014-10-14 | 2014-10-14 | The method that polyester is changed the line of production online |
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| CN104262598A true CN104262598A (en) | 2015-01-07 |
| CN104262598B CN104262598B (en) | 2016-06-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104672440A (en) * | 2015-03-05 | 2015-06-03 | 浙江万凯新材料有限公司 | Separated esterification copolyester producing and combining device |
| CN108299634A (en) * | 2018-01-27 | 2018-07-20 | 安阳龙宇投资管理有限公司 | The production system and its production method of one kind of multiple kind polyester intermediates |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102190784A (en) * | 2011-04-01 | 2011-09-21 | 浙江万凯新材料有限公司 | Production equipment for PET (poly(ethylene terephthalate)) chip |
| CN102691131A (en) * | 2012-06-19 | 2012-09-26 | 福建经纬新纤科技实业有限公司 | Manufacturing equipment system of flame-retardant polyester fiber |
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2014
- 2014-10-14 CN CN201410542068.2A patent/CN104262598B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190784A (en) * | 2011-04-01 | 2011-09-21 | 浙江万凯新材料有限公司 | Production equipment for PET (poly(ethylene terephthalate)) chip |
| CN102691131A (en) * | 2012-06-19 | 2012-09-26 | 福建经纬新纤科技实业有限公司 | Manufacturing equipment system of flame-retardant polyester fiber |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104672440A (en) * | 2015-03-05 | 2015-06-03 | 浙江万凯新材料有限公司 | Separated esterification copolyester producing and combining device |
| CN104672440B (en) * | 2015-03-05 | 2016-08-17 | 浙江万凯新材料有限公司 | Individually esterification co-polyester production combination unit |
| CN108299634A (en) * | 2018-01-27 | 2018-07-20 | 安阳龙宇投资管理有限公司 | The production system and its production method of one kind of multiple kind polyester intermediates |
| CN108299634B (en) * | 2018-01-27 | 2020-02-04 | 安阳龙宇投资管理有限公司 | Production system and production method of multi-type polyester intermediates |
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| CN104262598B (en) | 2016-06-22 |
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Address after: 314415 Zhejiang province Haining city Jianshan District Road No. 15 Wen Patentee after: Wankai new materials Co., Ltd Address before: 314415 Zhejiang province Haining city Jianshan District Road No. 15 Wen Patentee before: ZHEJIANG WANKAI NEW MATERIALS Co.,Ltd. |