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CN111004393A - Washing water circulation process for polyphenylene sulfide production - Google Patents

Washing water circulation process for polyphenylene sulfide production Download PDF

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Publication number
CN111004393A
CN111004393A CN201911300774.5A CN201911300774A CN111004393A CN 111004393 A CN111004393 A CN 111004393A CN 201911300774 A CN201911300774 A CN 201911300774A CN 111004393 A CN111004393 A CN 111004393A
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water
washing water
washing
circulation system
water circulation
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吕天生
陈尚敬
谢晓鸿
杨思瑶
屈胜春
黄国庆
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Chongqing Glion New Material Technology Co Ltd
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Chongqing Glion New Material Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
    • C08G75/02—Polythioethers
    • C08G75/0204—Polyarylenethioethers
    • C08G75/0277—Post-polymerisation treatment
    • C08G75/0281—Recovery or purification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

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  • Environmental & Geological Engineering (AREA)
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  • Hydrology & Water Resources (AREA)
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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

本发明公开了聚苯硫醚生产用洗水循环工艺，包括精馏回收水循环系统、洗涤水循环系统、冷凝水循环系统和洗水补充系统；所述精馏回收水循环系统主要为含盐、有机物、水的混合物料通过精馏回收达到脱盐水水质的回收水；所述洗涤水循环系统包括前端洗水循环系统和后端洗水循环系统，所述前端洗水循环系统收集初级洗涤水，并将初级洗涤水通入合成料浆，所述后端洗水循环系统收集第n级洗涤水，并将第n级洗涤水加入(n‑x)级洗水工序，其中x大于等于1；所述冷凝水循环系统包括生产蒸发冷凝水循环系统和辅助生产蒸发冷凝水循环系统，所述冷凝水循环系统的循环水加入任意级别洗水工序；所述洗水补充系统为脱盐水。本发明具有结构简单、操作方便、回收有效、节约能源的优点。

Figure 201911300774

The invention discloses a washing water circulation process for polyphenylene sulfide production, including a rectification recovery water circulation system, a washing water circulation system, a condensed water circulation system and a washing water supplementary system; the rectification recovery water circulation system is mainly composed of salt, organic matter and water. The mixed material is recovered by rectification to reach the recovered water of desalinated water quality; the washing water circulation system includes a front-end washing water circulation system and a back-end washing water circulation system, and the front-end washing water circulation system collects the primary washing water and passes the primary washing water into the synthetic water. Slurry, the back-end washing water circulation system collects the nth level washing water, and adds the nth level washing water to the (n-x) level washing water process, wherein x is greater than or equal to 1; the condensate water circulation system includes production evaporation condensation Water circulation system and auxiliary production evaporative condensed water circulation system, the circulating water of the condensed water circulation system is added to the washing water process of any level; the washing water supplementary system is desalinated water. The invention has the advantages of simple structure, convenient operation, effective recovery and energy saving.

Figure 201911300774

Description

Washing water circulation process for polyphenylene sulfide production
Technical Field
The invention relates to the technical field of chemical equipment, in particular to a washing water circulation process for polyphenylene sulfide production.
Background
In the production process of polyphenylene sulfide, in order to guarantee the purity of a product, multistage washing is needed after reaction synthesis is completed, washing water is used in the washing process, the product can be washed by the washing water, and impurities such as oligomer, solvent, inorganic salt and the like remained on the product after production are washed, so that the cleanness, purity and quality of the product are guaranteed.
At the present stage, a large amount of raw water is added in the washing process, 8-10 square of water is required for washing per ton of products on average, the washing process is divided into multiple stages, the concentration of impurities contained in the washing water generated after washing at each stage is gradually reduced, the concentration is higher when the stage is closer to the front, under most conditions, all stages of washing water (especially the stage is closer to the front) can not be recovered, if the washing water is not recovered, the washing water containing more impurities can form a large amount of high-salt waste water, the pollution to the environment is larger, in addition, the water after washing has larger economic benefits, at the present stage, along with the increase of environmental protection, enterprises mostly recover and separate waste and liquid in the production process, the washing water washing is also involved in the recovery and separation, no matter whether the products or recovered substances, at the present stage, the recovery of the washing water of most enterprises only stays at the washing water at the rear stage, the water is cleaner and convenient to recover, but the washing water with larger concentration and the rectification recovered water are directly discharged, so that the environmental protection problem is prominent.
Disclosure of Invention
To the deficiency of the prior art, the technical problem to be solved by the present patent application is: how to provide a washing water circulation process for polyphenylene sulfide production, which has simple structure, convenient operation, effective recovery and energy saving.
In order to achieve the purpose, the invention adopts the following technical scheme:
a washing water circulation process for polyphenylene sulfide production comprises a rectification recovery water circulation system, a washing water circulation system, a condensed water circulation system and a washing water supplement system;
the rectification recycling water circulation system mainly washes washing water of polyphenylene sulfide finished products after centrifugal separation of polyphenylene sulfide synthetic slurry and liquid phase mixed liquid after separation of the synthetic slurry to carry out step-by-step separation and recycle on the generated recycling water. The mixed liquid mainly contains organic matters containing salt, NMP and the like and water. The mixed material is desalted through forced evaporation to obtain a solvent and water, and the solvent is recovered through rectification to recover water, wherein the recovered water reaches the quality of desalted water.
The washing water circulating system comprises a front-end washing water circulating system and a rear-end washing water circulating system, the front-end washing water circulating system collects primary washing water, the primary washing water is introduced into the synthetic slurry, the rear-end washing water circulating system collects nth-stage washing water, the nth-stage washing water is added into the (n-x) stage washing water process, wherein x is more than or equal to 1;
the condensed water circulating system comprises a production evaporation condensed water circulating system and an auxiliary production evaporation condensed water circulating system, and the circulating water of the condensed water circulating system is added into a washing process of any level;
the washing water replenishing system is desalted water.
Furthermore, a first water storage tank is arranged in the front-end washing water circulating system and used for storing primary washing water, the first water storage tank is connected with the primary washing water process through a first feeding pipe, and the first water storage tank is connected with the synthetic slurry tank through a first discharging pipe.
Furthermore, the rear end washing water circulation system is provided with a second water storage tank, the second water storage tank is connected with the nth stage washing water process through a second feeding pipe, wherein n is greater than 1, and the second water storage tank is connected with each stage washing water process through a second discharging pipe.
Furthermore, the production evaporation condensed water circulating system is used for recovering gas evaporated in the production process to a condensed water storage tank through condensation, and the condensed water storage tank is connected with all stages of washing procedures through a fourth water outlet pipe.
Furthermore, the auxiliary production evaporation condensed water circulating system is used for recovering and condensing the steam introduced into the drying mechanism and the heat preservation mechanism and introducing the steam into a condensed water storage tank.
Furthermore, the desalted water is stored in a desalted water storage tank, and the desalted water storage tank is connected with all stages of washing procedures through a fourth water outlet pipe.
Further, the device also comprises a pump and an electromagnetic valve.
The washing water circulation process for polyphenylene sulfide production provided by the invention can fully recycle the washing water flushed into the equipment, especially the primary washing water is flushed into the synthetic slurry, the impurities such as low polymer, solvent, inorganic salt and the like in the synthetic slurry are diluted and dissolved, so that the method is used as a basis for subsequent washing and separation and avoids the problems that in the separation process, under the condition that the concentrations of impurities such as oligomer, solvent, inorganic salt and the like are too high to be effectively separated, all levels of washing water can be reused as washing water after being recovered, because the interior only contains the elements generated by the product and other elements capable of reacting with the product can not be brought in, the quality of the product can not be influenced, in addition, after washing, the temperature of water is increased, and compared with newly added desalted water, the process of temperature rise is omitted, and the energy consumption is reduced; the water vapor evaporated in the equipment and the condensed water obtained by the heat exchange of the water vapor for heat preservation and drying can be added with the washing water, so that the utilization rate is improved.
Drawings
FIG. 1 is a frame diagram of a washing water circulation process for polyphenylene sulfide production disclosed in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a washing water circulation process for polyphenylene sulfide production comprises a rectification recovery water circulation system, a washing water circulation system, a condensed water circulation system and a washing water supplement system; the rectification recycling water circulation system mainly washes washing water of polyphenylene sulfide finished products after centrifugal separation of polyphenylene sulfide synthetic slurry and liquid phase mixed liquid after separation of the synthetic slurry to carry out step-by-step separation and recycle on the generated recycling water. The mixed liquid mainly contains organic matters containing salt, NMP and the like and water. The mixed material is desalted through forced evaporation to obtain a solvent and water, and the solvent is recovered through rectification to recover water, wherein the recovered water reaches the quality of desalted water; the washing water circulating system comprises a front-end washing water circulating system and a rear-end washing water circulating system, the front-end washing water circulating system collects primary washing water, the primary washing water is introduced into the synthetic slurry, the rear-end washing water circulating system collects nth-stage washing water, the nth-stage washing water is added into the (n-x) stage washing water process, wherein x is more than or equal to 1; the condensed water circulating system comprises a production evaporation condensed water circulating system and an auxiliary production evaporation condensed water circulating system, and the circulating water of the condensed water circulating system is added into a washing process of any level; the washing water replenishing system is desalted water.
Specifically, be provided with first water storage tank in the front end washing water circulating system, first water storage tank is used for saving elementary washing water, be connected with elementary washing water process through first inlet pipe on the first water storage tank, first water storage tank is through first outlet pipe and synthetic slurry tank.
Specifically, the rear end washing water circulation system is provided with a second water storage tank, the second water storage tank is connected with the nth-stage washing water process through a second feeding pipe, wherein n is greater than 1, and the second water storage tank is connected with each stage washing water process through a second discharging pipe.
Specifically, the production evaporation condensed water circulating system is used for recovering gas evaporated in the production process and recovering the gas to a condensed water storage tank through condensation, and the condensed water storage tank is connected with all stages of washing procedures through a fourth water outlet pipe.
Specifically, the auxiliary production evaporation condensed water circulating system is used for recovering steam introduced into the drying mechanism and the heat preservation mechanism, exchanging heat, condensing the steam, and introducing the steam into a condensed water storage tank.
Specifically, the desalted water is stored in a desalted water storage tank, and the desalted water storage tank is connected with all stages of washing procedures through a fourth water outlet pipe.
In particular, the device also comprises a pump and an electromagnetic valve.
Specifically, the automatic water supply device further comprises a PLC (programmable logic controller), wherein the PLC is S-700, and the PLC is electrically connected with the pump and the electromagnetic valve, so that automatic control is realized, and the automation degree and the water supplement precision are improved.
The washing water circulation process for polyphenylene sulfide production provided by the invention can fully recycle the washing water entering the equipment, especially the primary washing water is utilized and flushed into the synthetic slurry, the impurities such as solvent, inorganic salt and the like in the synthetic slurry are diluted and dissolved, so that the method is a basis for subsequent washing and separation and avoids the problems that in the separation process, under the condition that the concentrations of impurities such as oligomer, solvent, inorganic salt and the like are too high to be effectively separated, all levels of washing water can be reused as washing water after being recovered, because the interior only contains the elements generated by the product and other elements capable of reacting with the product can not be brought in, the quality of the product can not be influenced, in addition, after washing, the temperature of water is increased, and compared with newly added desalted water, the process of temperature rise is omitted, and the energy consumption is reduced; the water vapor evaporated in the equipment and the water vapor used for heat preservation and drying can be added with washing water after heat exchange and condensation, so that the utilization rate is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (8)

1.一种聚苯硫醚生产用洗水循环工艺，其特征在于，包括精馏回收水循环系统、洗涤水循环系统、冷凝水循环系统和洗水补充系统；1. a washing water circulation process for the production of polyphenylene sulfide, is characterized in that, comprises rectification recovery water circulation system, washing water circulation system, condensed water circulation system and washing water supplementary system; 所述精馏回收水循环系统主要为含盐、有机物、水的混合物料通过精馏回收达到脱盐水水质的回收水。该回收水直接进入洗水补充系统作为洗涤原水。The rectification recovery water circulation system is mainly the recovery water that the mixed material containing salt, organic matter and water is recovered to the desalinated water quality through rectification recovery. The recovered water directly enters the washing water supplement system as washing raw water. 所述洗涤水循环系统包括前端洗水循环系统和后端洗水循环系统，所述前端洗水循环系统收集初级洗涤水，并将初级洗涤水通入合成料浆，所述后端洗水循环系统收集第n级洗涤水，并将第n级洗涤水加入(n-x)级洗水工序，其中x大于等于1；The washing water circulation system includes a front-end washing water circulation system and a back-end washing water circulation system. The front-end washing water circulation system collects the primary washing water and passes the primary washing water into the synthetic slurry, and the back-end washing water circulation system collects the nth stage. washing water, and adding the n-th stage washing water to the (n-x) stage washing water process, wherein x is greater than or equal to 1; 所述冷凝水循环系统包括生产蒸发冷凝水循环系统和辅助生产蒸发冷凝水循环系统，所述冷凝水循环系统的循环水加入任意级别洗水工序；The condensed water circulation system includes a production evaporative condensed water circulation system and an auxiliary production evaporative condensed water circulation system, and the circulating water of the condensed water circulation system is added to any level of washing water process; 所述洗水补充系统为脱盐水。The wash water supplement system is desalinated water. 2.根据权利要求1所述的一种聚苯硫醚生产用洗水循环工艺，其特征在于，所述精馏回收水循环系统主要洗涤聚苯硫醚合成料浆离心分离后聚苯硫醚成品的洗涤水及合成料浆分离后液相的混合液进行逐级分离回收产生的回收水。其混合液主要为含盐、NMP等有机物及水。该混合物料通过强制蒸发除盐得到溶剂和水，再通过精馏回收溶剂，进而回收水，该回收水达到脱盐水水质。该回收水直接进入洗水补充系统作为洗涤原水。2. a kind of polyphenylene sulfide production according to claim 1 is characterized in that, described rectification recovery water circulation system mainly washes polyphenylene sulfide synthetic slurry centrifugal separation after the polyphenylene sulfide finished product. The mixed liquid of the liquid phase after the separation of the washing water and the synthetic slurry is subjected to step-by-step separation and recovery of the recovered water produced. The mixed solution is mainly composed of salt, NMP and other organic matter and water. The mixed material is desalted by forced evaporation to obtain solvent and water, and then the solvent is recovered by rectification, and then water is recovered, and the recovered water reaches desalinated water quality. The recovered water directly enters the washing water supplement system as washing raw water. 3.根据权利要求1所述的一种聚苯硫醚生产用洗水循环工艺，其特征在于，所述前端洗水循环系统内设置有第一储水罐，所述第一储水罐用于存储初级洗涤水，所述第一储水罐上通过第一进料管与初级洗水工序连接，所述第一储水罐通过第一出水管和合成料浆槽连接。3. a kind of washing water circulation process for polyphenylene sulfide production according to claim 1, is characterized in that, described front-end washing water circulation system is provided with first water storage tank, and described first water storage tank is used for storing Primary washing water, the first water storage tank is connected to the primary washing process through a first feed pipe, and the first water storage tank is connected to the synthetic slurry tank through a first water outlet pipe. 4.根据权利要求2所述的一种聚苯硫醚生产用洗水循环工艺，其特征在于，所述后端洗水循环系统设置有第二储水罐，所述第二储水罐通过第二进料管与第n级洗水工序连接，其中n大于1，所述第二储水罐通过第二出料管与各级洗水工序连接。4. a kind of washing water circulation process for polyphenylene sulfide production according to claim 2, is characterized in that, described back-end washing water circulation system is provided with the second water storage tank, and described second water storage tank passes through the second The feeding pipe is connected with the n-th water washing process, wherein n is greater than 1, and the second water storage tank is connected with each level of washing process through the second discharging pipe. 5.根据权利要求3所述的一种聚苯硫醚生产用洗水循环工艺，其特征在于，生产蒸发冷凝水循环系统用于回收生产过程中，蒸发的气体，通过冷凝进行回收至冷凝水储罐，所述冷凝水储罐通过第四出水管与各级洗水工序均连接。5. a kind of polyphenylene sulfide production according to claim 3 is characterized in that, the production evaporation condensed water circulation system is used to reclaim in the production process, and the evaporated gas is recovered to the condensed water storage tank by condensation , the condensed water storage tank is connected with all levels of water washing processes through the fourth water outlet pipe. 6.根据权利要求4所述的一种聚苯硫醚生产用洗水循环工艺，其特征在于，辅助生产蒸发冷凝水循环系统用于回收通入干燥机构、保温机构的蒸汽被换热后冷凝，并通入冷凝水储罐中。6. a kind of polyphenylene sulfide production according to claim 4, is characterized in that, auxiliary production evaporative condensate water circulation system is used to reclaim and pass into the steam of drying mechanism, heat preservation mechanism to be condensed after heat exchange, and into the condensate storage tank. 7.根据权利要求5所述的一种聚苯硫醚生产用洗水循环工艺，其特征在于，所述脱盐水存储在脱盐水储罐中，所述脱盐水储罐通过第四出水管与各级洗水工序均连接。7. A kind of washing water circulation process for polyphenylene sulfide production according to claim 5, is characterized in that, described desalted water is stored in desalted water storage tank, and described desalted water storage tank is connected with each other through the fourth water outlet pipe. Stage washing process are connected. 8.根据权利要求6所述的一种聚苯硫醚生产用洗水循环工艺，其特征在于，还包括泵和电磁阀。8 . The washing water circulation process for polyphenylene sulfide production according to claim 6 , further comprising a pump and a solenoid valve. 9 .
CN201911300774.5A 2019-12-17 2019-12-17 Washing water circulation process for polyphenylene sulfide production Pending CN111004393A (en)

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Cited By (3)

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CN112358096A (en) * 2020-10-23 2021-02-12 重庆聚狮新材料科技有限公司 Refining method for polyphenylene sulfide rectification recovered water
CN115233326A (en) * 2020-12-25 2022-10-25 内蒙古双欣环保材料股份有限公司 A kind of tow washing method and device
CN116969550A (en) * 2023-08-24 2023-10-31 山东浩然特塑股份有限公司 Water recycling method in polysulfone resin synthesis process

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CN115233326A (en) * 2020-12-25 2022-10-25 内蒙古双欣环保材料股份有限公司 A kind of tow washing method and device
CN115323516A (en) * 2020-12-25 2022-11-11 内蒙古双欣环保材料股份有限公司 Six-effect evaporation, condensation and recovery device and method for fiber tow washing water
CN116969550A (en) * 2023-08-24 2023-10-31 山东浩然特塑股份有限公司 Water recycling method in polysulfone resin synthesis process

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Application publication date: 20200414