WO2022022703A1 - 一种聚碳酸酯的助剂添加装置和添加工艺 - Google Patents

一种聚碳酸酯的助剂添加装置和添加工艺 Download PDF

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Publication number
WO2022022703A1
WO2022022703A1 PCT/CN2021/109731 CN2021109731W WO2022022703A1 WO 2022022703 A1 WO2022022703 A1 WO 2022022703A1 CN 2021109731 W CN2021109731 W CN 2021109731W WO 2022022703 A1 WO2022022703 A1 WO 2022022703A1
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Prior art keywords
polycarbonate
mixing
tank
auxiliary agent
ball valve
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PCT/CN2021/109731
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English (en)
French (fr)
Inventor
孙彩虹
姬生龙
赵西宝
陈义忠
贺庆锐
肖彦
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聊城鲁西聚碳酸酯有限公司
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Publication of WO2022022703A1 publication Critical patent/WO2022022703A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/287—Raw material pre-treatment while feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22—Component parts, details or accessories; Auxiliary operations
    • B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
    • B29B7/242—Component parts, details or accessories; Auxiliary operations for feeding in measured doses
    • B29B7/244—Component parts, details or accessories; Auxiliary operations for feeding in measured doses of several materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22—Component parts, details or accessories; Auxiliary operations
    • B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/82—Heating or cooling
    • B29B7/826—Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/29—Feeding the extrusion material to the extruder in liquid form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to the technical field of polycarbonate processing, in particular to a device for adding additives to polycarbonate and an adding process.
  • Polycarbonate is a high molecular polymer containing carbonate groups in the molecular chain. According to the structure of ester groups, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types.
  • Polycarbonate plastic is a plastic with polycarbonate as the main component. Polycarbonate is an amorphous polymer that becomes a transparent glass after melting and cooling, and has excellent optical and mechanical properties. High melting point, low temperature resistance, low water absorption, good impact resistance, insulation and aging resistance, and resistance to inorganic and organic dilute acids. Polycarbonate plastic can be used to make signs, instrument housings, furniture, car lights, electrical parts, instrument panels, etc. Polycarbonate has good optical properties, flame retardant properties, electrical properties and dimensional stability.
  • additives such as antioxidants, mold release agents, and toners are usually added in the melt extrusion process. These additives are directly added to the polycarbonate melt, which is difficult to disperse uniformly and easily. Caking, affecting product quality.
  • Liquid addition systems can solve the problem of additive caking.
  • additives generally have higher melting points, and it is necessary to find a suitable solvent for the melting of the additives, which does not affect the quality of the product. Therefore, in the process of producing polycarbonate, it is an urgent technical problem to be solved at present to ensure the quality of polycarbonate products while accelerating the melting of additives.
  • the present invention provides an additive adding device and an adding process for polycarbonate.
  • a first aspect of the present invention provides a polycarbonate additive addition device, including a mixing and preparing tank, a liquid storage tank, a pumping pump, and a conveying pipe, wherein the conveying pipe connects the mixing and preparing tank, the liquid storage tank and the pumping pump connected in sequence; a steam heating jacket is arranged on the outside of the mixing and preparing tank, a feeding hopper is opened on the top of the mixing and preparing tank, and the suction pump is connected to the discharge port of the mixing and preparing tank;
  • a circulation pipe is connected between the mixing and preparation tank and the pumping pump, and a ball valve on the circulation pipe is installed on the circulation pipe, and a ball valve on the conveying pipe is installed on the conveying pipe between the pumping pump and the liquid storage tank.
  • opening the ball valve on the circulation pipe and closing the ball valve on the conveying pipe can promote the circulation of the auxiliary solution in the mixing and preparation tank, so that the The ingredients are evenly dispersed to ensure its excellent effect; after the mixing is completed, the ball valve on the circulation pipe and the ball valve on the conveying pipe are opened at the same time, and the next part of the auxiliary solution can be returned to the mixing tank by the pumping pump.
  • the flow efficiency of the auxiliary solution is increased to avoid precipitation and condensation of the auxiliary solvent, and at the same time, the flow rate of the auxiliary solution can be adjusted, so as to facilitate the addition of the auxiliary to reach the best state, so as to promote each auxiliary.
  • the modification effect of polycarbonate can be effectively exerted.
  • the stirring device in the mixing and preparing tank can speed up the dissolution of the auxiliary agent in ESO; when the stirring device is running, the driving motor drives the rotation of the stirring shaft, and the stirring shaft further drives the rotation of the stirring paddle, so as to realize the stirring function , the structure is simple, the operation is convenient, the production cost is low, and the mixing efficiency of the auxiliary agent can be effectively improved.
  • a second aspect of the present invention provides a polycarbonate additive mixing and adding process, comprising the following steps:
  • step (4) Open the outlet valve of the mixing and preparing tank, send the uniform mixed liquid obtained in step (4) to the liquid storage tank through the conveying pipe, open the liquid feeding mode of the extruder barrel, and uniformly mix the liquid in the liquid storage tank. Precisely controlled addition of the liquid to the polycarbonate melt in the extruder barrel.
  • step (3) the temperature of ESO is maintained at 45-55°C;
  • step (3) the mixing preparation time of auxiliary agent and ESO is 2.5-3h;
  • step (5) the mixed solution needs to be sampled and analyzed before being pumped into the liquid storage tank, and the pumping operation is performed when the dissolved weight percentage of the auxiliary agent is 98%-100%.
  • the weight percentage of the dissolved additives in the mixed solution is less than 98%, it means that there are many additives that have not been dissolved.
  • the mixing of carbonate melt is uneven, which affects the modification effect of additives on polycarbonate. It can better ensure the quality and performance of polycarbonate products by measuring the content before extraction.
  • the auxiliary agent is first dissolved in the release agent ESO that can be used in the polycarbonate processing process, avoiding the introduction of new auxiliary agent solvent and reducing the impact on polycarbonate.
  • a circulation pipe is set up.
  • the auxiliary solution can be returned to the mixing tank by the next part driven by the pumping pump, thereby increasing the flow efficiency of the auxiliary solution.
  • the flow rate of the auxiliary solution can be adjusted, so as to facilitate the addition of the auxiliary to reach the best state, so as to promote the modification of the polycarbonate by each auxiliary. Play effectively.
  • the dissolution efficiency of the auxiliary agent can be optimized, so that the auxiliary agent can be dissolved. It is better to improve the quality and performance of polycarbonate products.
  • Fig. 1 is the structural representation of the additive mixing and adding system of polycarbonate
  • the present invention provides a Additive addition device and addition process for polycarbonate.
  • a device for adding additives to polycarbonate including a mixing and preparing tank, a liquid storage tank, a pumping pump, and a conveying pipe, wherein the conveying pipe connects the mixing and preparing tank, the liquid storage tank, and the pumping pipe.
  • the feed pumps are connected in sequence; a steam heating jacket is arranged on the outside of the mixing preparation tank, a feeding hopper is opened on the top of the mixing preparation tank, and the suction pump is connected to the discharge port of the mixing preparation tank;
  • a circulation pipe is connected between the mixing and preparation tank and the pumping pump, and a ball valve on the circulation pipe is installed on the circulation pipe, and a ball valve on the conveying pipe is installed on the conveying pipe between the pumping pump and the liquid storage tank.
  • opening the ball valve on the circulation pipe and closing the ball valve on the conveying pipe can promote the circulation of the auxiliary solution in the mixing and preparation tank, so that the The ingredients are evenly dispersed to ensure its excellent effect; after the mixing is completed, the ball valve on the circulation pipe and the ball valve on the conveying pipe are opened at the same time, and the next part of the auxiliary solution can be returned to the mixing tank by the pumping pump.
  • the flow efficiency of the auxiliary solution is increased to avoid precipitation and condensation of the auxiliary solvent, and at the same time, the flow rate of the auxiliary solution can be adjusted, so as to facilitate the addition of the auxiliary to reach the best state, so as to promote each auxiliary.
  • the modification effect of polycarbonate can be effectively exerted.
  • the polycarbonate auxiliary agent addition device further comprises: nitrogen pipeline, nitrogen pipeline ball valve, steam pipeline, steam pipeline ball valve, steam pipeline pneumatic valve and condensate collection tank;
  • Said opening the nitrogen pipeline ball valve on the nitrogen pipeline can carry out nitrogen protection for the mixing preparation tank; opening the steam pipeline ball valve and the steam pipeline pneumatic valve on the steam pipeline can heat up the mixing preparation tank; the condensate collection pool is used to collect steam condensation liquid after.
  • the auxiliary agent adding device for polycarbonate further includes a conveying pipeline heating tape and a heat insulation cotton; Insulation;
  • the polycarbonate auxiliary agent addition device further comprises an extruder barrel, the liquid feeding mode of the extruder barrel is turned on, and the polycarbonate is placed in the extruder barrel melt.
  • the polycarbonate additive addition device further includes a steam condensate ball valve; a safety valve root valve, a mixing and preparation tank outlet valve, a liquid weighing storage tank inlet valve, and a pumping pump outlet pouring Valve and pump inlet dump valve.
  • the polycarbonate adjuvant adding device further includes a condensate outlet pressure gauge, a mixing and preparation tank temperature gauge and a suction pump outlet pressure gauge.
  • a process for mixing and adding additives for polycarbonate is provided, which is easy to operate and can effectively accelerate the melting of the additives, which is achieved through the following technical solutions:
  • a process for adding additives to polycarbonate comprising the following steps:
  • step 5 Open the outlet valve of the mixing and preparing tank, send the uniform mixture obtained in step 4 to the liquid storage tank through the conveying pipe, open the liquid feeding mode of the extruder barrel, and accurately control the uniform mixture in the liquid storage tank Added to the polycarbonate melt in the extruder barrel.
  • the present invention adds the auxiliary agent into the hot ESO to promote the rapid dissolution of the auxiliary agent; then the prepared mixed solution is self-circulated to obtain a uniform auxiliary agent solution, which reduces the effect of the auxiliary agent on caking.
  • the effect of polycarbonate production; the auxiliary solution is then temporarily stored in the liquid storage tank with a suction pump, which promotes the homogeneity and stability of the auxiliary solution, and is also used as an auxiliary in the production of polycarbonate.
  • the flow adjustment equipment of the agent solution is used; finally, the liquid storage tank is used to precisely control the proportion of the additives added to the polycarbonate melt.
  • the liquid after the additives are fully dissolved can obtain a better dispersion effect, so as to ensure that the modification effect of each additive on the polycarbonate can be effectively exerted.
  • the whole using step is easy to operate, and can realize rapid dissolution of the auxiliary agent, thereby helping to better improve the production efficiency and product quality of the polycarbonate.
  • step 3 the temperature of the ESO is maintained at 45-55°C.
  • the additives and ESO may be decomposed, volatilized, etc., so that the amount of the additives and ESO added to the polycarbonate melt is lower than the actual feeding amount, and it is difficult to guarantee Modification effect of additives on polycarbonate; but too high temperature is not conducive to production and energy saving, and additives can be fully dissolved in ESO at around 50 °C; when the temperature of ESO is lower than 45 °C, the dissolution rate of additives is significantly lower above 45°C.
  • setting the temperature of ESO at 45-55 °C can not only ensure the stability of the auxiliary and ESO, but also save energy, and at the same time can effectively improve the dissolution rate of the auxiliary, so that the auxiliary can be better for the polycarbonate product. Quality and performance are improved.
  • the mixing time of the auxiliary agent and ESO is 2.5-3h.
  • step (5) the mixed solution needs to be sampled and analyzed before being pumped into the liquid storage tank, and the pumping operation is performed when the weight percentage of the dissolved auxiliary agent is 98%-100%.
  • the weight percentage of the dissolved additives in the mixed solution is less than 98%, it means that there are many additives that have not been dissolved.
  • the mixing of carbonate melt is uneven, which affects the modification effect of additives on polycarbonate. It can better ensure the quality and performance of polycarbonate products by measuring the content before extraction.
  • a device for adding additives to polycarbonate comprising a mixing preparation tank, a liquid storage tank, a pumping pump, and a conveying pipe connected in sequence through a conveying pipe, wherein the conveying pipe connects the mixing preparation tank, the liquid storage tank and the pumping pump in sequence
  • the outside of the mixing preparation tank is provided with a steam heating jacket
  • the top of the mixing preparation tank is provided with a feeding hopper for the input of auxiliary agents and ESO
  • the suction pump is connected to the discharge port of the mixing preparation tank.
  • the liquid storage tank is connected to the extruder barrel.
  • a circulation pipe is connected between the mixing and preparation tank and the pumping pump, and a ball valve on the circulation pipe is installed on the circulation pipe, and a ball valve on the conveying pipe is installed on the conveying pipe between the pumping pump and the liquid storage tank.
  • a method of using a polycarbonate auxiliary agent adding device comprising the following steps:
  • step 3 The mixed solution obtained in step 2 is heated while stirring, and the heating temperature is maintained at 50°C; the mixing and preparation time of the auxiliary agent and ESO is 2.5h;
  • step 5 Open the outlet valve of the mixing and preparing tank, send the uniform mixture obtained in step 4 to the liquid storage tank through the conveying pipe, open the liquid feeding mode of the extruder barrel, and accurately control the uniform mixture in the liquid storage tank Add into the polycarbonate melt in the barrel of the extruder; the mixed solution needs to be sampled and analyzed before being pumped into the liquid storage tank. When the weight percentage of the dissolved additives is 98%, the pumping operation is performed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

提供了一种聚碳酸酯的助剂添加装置和添加工艺，可以解决保证聚碳酸酯产品质量的同时加快助剂的溶化的技术问题，聚碳酸酯的助剂添加装置，包括混合配制罐（1）、液体存储罐（2）、抽料泵（3）、输送管（4），其中输送管（4）将混合配制罐（1）、液体存储罐（2）和抽料泵（3）依次连接；混合配制罐（1）的顶部开设进料斗（6），抽料泵（3）连接于混合配制罐（1）的出料口处；混合配制罐（1）与抽料泵（3）之间连接有一个循环管（7），且循环管（7）上安装有循环管上球阀（8），抽料泵（3）与液体存储罐（2）之间的输送管（4）上安装有输送管上球阀（9），其结构简单、操作方便、生产成本低，同时结合ESO能够有效提高助剂混合的效率。同时其装置的使用方法中限定了ESO的维持温度，有效提高助剂的溶解速度，使得助剂能够较好对聚碳酸酯产品的质量以及性能加以改善。

Description

一种聚碳酸酯的助剂添加装置和添加工艺 技术领域
本发明涉及聚碳酸酯加工技术领域，具体涉及一种聚碳酸酯的助剂添加装置和添加工艺。
背景技术
公开该背景技术部分的信息仅仅旨在增加对本发明的总体背景的理解，而不必然被视为承认或以任何形式暗示该信息构成已经成为本领域一般技术人员所公知的现有技术。
聚碳酸酯是分子链中含有碳酸酯基的高分子聚合物，根据酯基的结构可分为脂肪族、芳香族、脂肪族－芳香族等多种类型。聚碳酸酯塑料，是以聚碳酸酯为主要成分的塑料。聚碳酸酯是非晶态聚合物，在熔化和冷却后变成透明的玻璃状物，具有优良的光学和力学性能。熔点较高，也能耐低温，吸水性小，其耐冲击性、绝缘性和抗老化性均较好，还能耐受无机及有机稀酸等。聚碳酸酯塑料可制作标牌、仪器外壳、家具、汽车车灯、电器零件、仪器仪表盘等。聚碳酸酯具有良好的光学性能、阻燃性能和电学性能以及尺寸稳定性等。
聚碳酸酯的加工过程中通常会在熔体挤出过程中添加一些抗氧剂、脱模剂、色粉等助剂，这些助剂直接加入聚碳酸酯熔体中很难均匀分散开且易结块，影响产品质量。
液体添加系统可以解决添加剂结块的问题。但助剂普遍有较高的熔点，需要找到合适的溶剂助剂的熔化，该溶剂又不影响产品质量。因此，在生产聚碳酸酯过程中，保证聚碳酸酯产品质量的同时加快助剂的熔化是目前急需解决的技术难题。
发明内容
为了解决保证聚碳酸酯产品质量的同时加快助剂的熔化的技术问题，本发明提供一种聚碳酸酯的助剂添加装置和添加工艺。
具体的，本发明的技术方案如下：
本发明的第一方面，提供一种聚碳酸酯的助剂添加装置，包括混合配制罐、液体存储罐、抽料泵、输送管，其中输送管将混合配制罐、液体存储罐和抽料泵依次连接；所述混合配制罐的外部设有蒸汽加热套，混合配制罐的顶部开设有进料斗，所述抽料泵连接于混合配制罐的出料口处；
所述混合配制罐与抽料泵之间连接有一个循环管，且循环管上安装有循环管上球阀，抽料泵与液体存储罐之间的输送管上安装有输送管上球阀。
通过采用上述技术方案，配置聚碳酸酯助剂溶液的过程中，开启循环管上球阀，同时关闭输送管上球阀，能够促使助剂溶液在混合配制罐中循环流动，使得助剂溶液中的各成分均匀分散，以此保证其优良的效果；混合配制结束后，同时开启循环管上球阀和输送管上球阀，助剂溶液在抽料泵带动下一部分能够回流至混合配制罐中，以此加大了助剂溶液的流动效率，以免助剂溶剂出现沉淀、凝结等状况，同时使得助剂溶液的流量可以进行调节，以此便于助剂的添加量达到最佳状态，以此促使各助剂对聚碳酸酯的改性作用得以有效发挥。
通过采用上述技术方案，混合配制罐中的搅拌装置能够加快助剂溶解于ESO中；搅拌装置在运行时，驱动电机带动搅拌轴的旋转，搅拌轴进而带动搅拌桨的旋转，以此实现搅拌功能，其结构简单、操作方便、生产成本低，同时能够有效提高助剂混合的效率。
本发明的第二方面，提供一种聚碳酸酯的助剂混合添加工艺，包括以下步骤：
(1)打开氮气管线上的氮气管道球阀，对混合配制罐进行氮气保护；打 开蒸汽管线上的蒸汽管道球阀、蒸汽管道气动阀和蒸汽冷凝液球阀，对混合配制罐升温；打开抽料泵的输送管线伴热带，对管道进行升温；
(2)开启混合配制罐的进料斗，将ESO和助剂先后投入至混合配制罐中，混合配制后得到助剂和ESO的混合液；
(3)将步骤(2)得到的混合溶液边加热边加以搅拌；
(4)将步骤(3)得到的助剂溶液进行自循环；
(5)打开混合配制罐出口阀，将步骤(4)得到的均匀混合液通过输送管送到液体存储罐中，开启挤出机筒体的液体进料模式，将液体存储罐中的均匀混合液精确控制加入挤出机筒体中的聚碳酸酯熔体内。
优选地，步骤(3)中，ESO的温度维持在45-55℃；
优选地，步骤(3)中，助剂与ESO的混合配制时间为2.5-3h；
优选地，步骤(5)中，混合液在抽入液体存储罐前需经过取样分析，待助剂溶解的重量百分数为98％-100％时，则进行抽料操作。
通过采用上述技术方案，若混合液中助剂溶解的重量百分数低于98％，则代表存在较多的助剂仍未溶解，此时若将混合液加入液体存储罐，会造成助剂在聚碳酸酯熔体中混合不均匀，进而影响助剂对聚碳酸酯的改性效果。其通过抽料前进行含量测定，能够较好的保证聚碳酸酯产品的质量以及性能。
本发明的一种或多种实施方式的有益效果是：
1)通过设置混合配制罐、进料泵和液体存储罐，使得助剂先溶解于可以用于聚碳酸酯加工过程的脱模剂ESO中，避免引入新的助剂溶剂，减少了对聚碳酸酯产品质量的影响；
2)设置了循环管，通过循环管上球阀和输送管上球阀的配合，助剂溶液在抽料泵带动下一部分能够回流至混合配制罐中，以此加大了助剂溶液的流动 效率，以免助剂溶剂出现沉淀、凝结等状况，同时使得助剂溶液的流量可以进行调节，以此便于助剂的添加量达到最佳状态，以此促使各助剂对聚碳酸酯的改性作用得以有效发挥。
3)通过设定ESO的维持温度和ESO与助剂的混合配制时间以及通过测定混合液在抽料前助剂的溶解量，以此使得助剂的溶解效率达到最佳，进而使得助剂能够较好对聚碳酸酯产品的质量以及性能加以改善。
附图说明
构成本发明的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。
图1为聚碳酸酯的助剂混合添加系统的结构示意图；
图中，1、混合配制罐；2、液体存储罐；3、抽料泵；4、输送管；5、蒸汽加热套；6、进料斗；7、循环管；8、循环管上球阀；9、输送管上球阀；10、搅拌装置；11、氮气管道；12、蒸汽管道；13、蒸汽管道球阀；14、蒸汽冷凝液球阀；15、氮气管道球阀；16、安全阀根部阀；17、输送管线伴热带；18、隔热棉；19、蒸汽管道气动阀；20、混合配制罐出口阀；21、液体存储罐进口阀；22、抽料泵出口倒淋阀；23、抽料泵进口倒淋阀；24、冷凝液出压力表；25、混合配制罐温度表；26、抽料泵出口压力表；27、挤出机筒体；28、冷凝液收集池。
具体实施方式
下面结合具体实施例，应该指出，以下详细说明都是例示性的，旨在对本发明提供进一步的说明。除非另有指明，本文使用的所有技术和科学术语具有与本发明所属技术领域的普通技术人员通常理解的相同含义。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图 限制根据本发明的示例性实施方式。
正如背景技术中提到的，在生产聚碳酸酯过程中，保证聚碳酸酯产品质量的同时加快助剂的熔化是目前急需解决的技术难题，为解决这一技术问题，本发明提供了一种聚碳酸酯的助剂添加装置和添加工艺。
本发明的一种实施方式中，提供一种聚碳酸酯的助剂添加装置，包括混合配制罐、液体存储罐、抽料泵、输送管，其中输送管将混合配制罐、液体存储罐和抽料泵依次连接；所述混合配制罐的外部设有蒸汽加热套，混合配制罐的顶部开设有进料斗，所述抽料泵连接于混合配制罐的出料口处；
所述混合配制罐与抽料泵之间连接有一个循环管，且循环管上安装有循环管上球阀，抽料泵与液体存储罐之间的输送管上安装有输送管上球阀。
通过采用上述技术方案，配置聚碳酸酯助剂溶液的过程中，开启循环管上球阀，同时关闭输送管上球阀，能够促使助剂溶液在混合配制罐中循环流动，使得助剂溶液中的各成分均匀分散，以此保证其优良的效果；混合配制结束后，同时开启循环管上球阀和输送管上球阀，助剂溶液在抽料泵带动下一部分能够回流至混合配制罐中，以此加大了助剂溶液的流动效率，以免助剂溶剂出现沉淀、凝结等状况，同时使得助剂溶液的流量可以进行调节，以此便于助剂的添加量达到最佳状态，以此促使各助剂对聚碳酸酯的改性作用得以有效发挥。
在一种具体的实施方式中，所述聚碳酸酯的助剂添加装置还包括：氮气管道、氮气管道球阀、蒸汽管道、蒸汽管道球阀、蒸汽管道气动阀和冷凝液收集池；
所述打开氮气管道上的氮气管道球阀，能够对混合配制罐进行氮气保护；打开蒸汽管线上的蒸汽管道球阀和蒸汽管道气动阀，能够对混合配制罐升温；冷凝液收集池用来收集蒸汽冷凝后的液体。
在一种具体的实施方式中，所述聚碳酸酯的助剂添加装置还包括输送管线伴热带和隔热棉；输送管线伴热带，能够对管道进行升温，隔热棉可以对管道的温度进行保温；
在一种具体的实施方式中，所述聚碳酸酯的助剂添加装置还包括挤出机筒体，开启挤出机筒体的液体进料模式，挤出机筒体中放有聚碳酸酯熔体。
在一种具体的实施方式中，所述聚碳酸酯的助剂添加装置还包括蒸汽冷凝液球阀；安全阀根部阀、混合配制罐出口阀、液体称储罐进口阀、抽料泵出口倒淋阀和抽料泵进口倒淋阀。
在一种具体的实施方式中，所述聚碳酸酯的助剂添加装置还包括冷凝液出压力表、混合配制罐温度表和抽料泵出口压力表。
本发明的一种实施方式中，提供一种聚碳酸酯的助剂混合添加工艺，该工艺操作简便，能够有效加快助剂的熔化，是通过以下技术方案得以实现的：
一种聚碳酸酯的助剂添加工艺，包括以下步骤：
1、打开氮气管线上的氮气管道球阀，对ESO预制罐进行氮气保护；打开蒸汽管线上的蒸汽管道球阀、蒸汽管道气动阀和蒸汽冷凝液球阀，对混合配制罐升温；打开抽料泵的输送管线伴热带，对管道进行升温；
2、开启混合配制罐的进料斗，将ESO和助剂先后投入至混合配制罐中，混合配制后得到助剂和ESO的混合液；
3、将步骤2得到的混合溶液边加热边加以搅拌；
4、将步骤3得到的助剂溶液进行自循环；
5、打开混合配制罐出口阀，将步骤4得到的均匀混合液通过输送管送到液体存储罐中，开启挤出机筒体的液体进料模式，将液体存储罐中的均匀混合液精确控制加入挤出机筒体中的聚碳酸酯熔体内。
通过采用上述技术方案，本发明将助剂加入至热的ESO中，促使助剂的快速溶解；随后将制得的混合液自循环，以此得到均一的助剂溶液，减少助剂结块对聚碳酸酯生产的影响；随后再用抽料泵将助剂溶液暂存于液体存储罐中，抽料泵促使助剂溶液的均一性和稳定性，另外在生产聚碳酸酯过程中用作助剂溶液的流量调节设备；最后再利用液体存储罐精确控制加入聚碳酸酯熔体中的助剂比例。相对于固态粉末直接加入熔体中，助剂充分溶解后的液体能够得到更好的分散效果，以此保证各助剂对聚碳酸酯的改性作用得以有效发挥。整个使用步骤操作简便，能够实现对助剂的快速溶解，进而有助于较好的提高聚碳酸酯的生产效率和产品质量。
在一种具体的实施方式中，步骤③中，ESO的温度维持在45-55℃。
通过采用上述技术方案，当ESO度高于100℃，助剂以及ESO存在分解、挥发等状况，使得助剂和ESO在加入聚碳酸酯熔体时的添加量比实际投料量低，进而难以保证助剂对聚碳酸酯的改性作用；但是温度过高不利于生产节能，50℃左右助剂就可以充分溶解在ESO中；当ESO的温度低于45℃时，助剂的溶解速度明显低于45℃以上。因此，设定ESO的温度维持在45-55℃既能保证助剂和ESO的稳定性，又节能，同时又能有效提高助剂的溶解速度，使得助剂能够较好对聚碳酸酯产品的质量以及性能加以改善。
在一种具体的实施方式中，步骤③中，助剂与ESO的混合配制时间为2.5-3h。通过采用上述技术方案，在相同的搅拌条件下，当配制时间少于2.5h时，助剂的溶解率会降低，进而影响助剂和聚碳酸酯熔体的混合；而当配制时间多于3h时，助剂以及ESO的含量则相对降低，造成不必要的浪费。因此，设定助剂与ESO的混合配制时间为2.5-3h能够保证助剂快速有效的溶解于ESO中，使得助剂能够较好对聚碳酸酯产品的质量以及性能加以改善。
在一种具体的实施方式中，步骤⑤中，混合液在抽入液体存储罐前需经过取样分析，待助剂溶解的重量百分数为98％-100％时，则进行抽料操作。通过采用上述技术方案，若混合液中助剂溶解的重量百分数低于98％，则代表存在较多的助剂仍未溶解，此时若将混合液加入液体存储罐，会造成助剂在聚碳酸酯熔体中混合不均匀，进而影响助剂对聚碳酸酯的改性效果。其通过抽料前进行含量测定，能够较好的保证聚碳酸酯产品的质量以及性能。
为了使得本领域技术人员能够更加清楚地了解本发明的技术方案，以下将结合具体的实施例与详细说明本发明的技术方案。
实施例1
一种聚碳酸酯的助剂添加装置，包括通过输送管依次连接的混合配制罐、液体存储罐、抽料泵、输送管，其中输送管将混合配制罐、液体存储罐和抽料泵依次连接；所述混合配制罐的外部设有蒸汽加热套，混合配制罐的顶部开设有供助剂和ESO投入的进料斗，所述抽料泵连接于混合配制罐的出料口处，所述液体存储罐连接挤出机筒体。所述混合配制罐与抽料泵之间连接有一个循环管，且循环管上安装有循环管上球阀，抽料泵与液体存储罐之间的输送管上安装有输送管上球阀。
实施例2
一种聚碳酸酯的助剂添加装置的使用方法，包括以下步骤：
1、打开氮气管线上的氮气管道球阀，对ESO预制罐进行氮气保护；打开蒸汽管线上的蒸汽管道球阀、蒸汽管道气动阀和蒸汽冷凝液球阀，对混合配制罐升温；打开抽料泵的输送管线伴热带，对管道进行升温；
2、开启混合配制罐的进料斗，将ESO和助剂先后投入至混合配制罐中，混合配制后得到助剂和ESO的混合液；
3、将步骤2得到的混合溶液边加热边加以搅拌，加热温度维持在50℃；助剂与ESO的混合配制时间为2.5h；
4、将步骤3得到的助剂溶液进行自循环；
5、打开混合配制罐出口阀，将步骤4得到的均匀混合液通过输送管送到液体存储罐中，开启挤出机筒体的液体进料模式，将液体存储罐中的均匀混合液精确控制加入挤出机筒体中的聚碳酸酯熔体内；混合液在抽入液体存储罐前需经过取样分析，待助剂溶解的重量百分数为98％时，则进行抽料操作。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种聚碳酸酯的助剂添加装置，其特征在于，包括混合配制罐、液体存储罐、抽料泵、输送管，其中输送管将混合配制罐、液体存储罐和抽料泵依次连接；所述混合配制罐的外部设有蒸汽加热套，混合配制罐的顶部开设有进料斗，所述抽料泵连接于混合配制罐的出料口处；
    所述混合配制罐与抽料泵之间连接有一个循环管，且循环管上安装有循环管上球阀，抽料泵与液体存储罐之间的输送管上安装有输送管上球阀。
  2. 根据权利要求1所述的聚碳酸酯的助剂添加装置，其特征在于，所述混合配制罐中设置有一搅拌装置，所述混合配制罐的外壁上配有蒸汽加热套；
    优选地，所述聚碳酸酯的助剂添加装置还包括输送管线伴热带和隔热棉；
    优选地，所述聚碳酸酯的助剂添加装置还包括挤出机筒体。
  3. 根据权利要求1所述的聚碳酸酯的助剂添加装置，其特征在于，所述聚碳酸酯的助剂添加装置还包括：氮气管道和蒸汽管道，氮气管道上设置有氮气管道球阀；蒸汽管道上设有蒸汽管道球阀和蒸汽管道气动阀；
    优选地，所述聚碳酸酯的助剂添加装置还包括蒸汽冷凝液球阀；安全阀根部阀、混合配制罐出口阀、液体称储罐进口阀、抽料泵出口倒淋阀和抽料泵进口倒淋阀；
    优选地，所述聚碳酸酯的助剂添加装置还包括冷凝液出压力表、混合配制罐温度表和抽料泵出口压力表。
  4. 根据权利要求1至3中任意一项所述的聚碳酸酯的助剂添加装置的使用方法，其特征在于：
    1)微开氮气管道上的氮气管道球阀，对ESO预制罐进行氮气保护；打开蒸汽管线上的蒸汽管道球阀、蒸汽管道气动阀和底部蒸汽冷凝液球阀，打开安 全阀根部球阀，对混合配制罐升温；打开抽料泵输送管线伴热带，对管道进行升温；
    2)开启混合配制罐的进料斗，将ESO和助剂先后投入至混合配制罐中，混合配制后得到助剂和ESO的混合液；
    3)将步骤2)得到的混合溶液边加热边加以搅拌；
    4)将步骤3)得到的助剂溶液进行自循环；
    5)打开混合配制罐出口阀，将步骤4)得到的均匀混合液通过输送管送到液体存储罐中，开启挤出机筒体的液体进料模式，将液体存储罐中的均匀混合液精确控制加入挤出机筒体中的聚碳酸酯熔体内。
  5. 根据权利要求4所述的聚碳酸酯的助剂添加装置的使用方法，其特征在于，步骤3)中，ESO的温度维持在45-55℃。
  6. 根据权利要求5所述的聚碳酸酯的助剂添加装置的使用方法，其特征在于，步骤3)中，ESO的温度维持在50℃。
  7. 根据权利要求4所述的聚碳酸酯的助剂添加装置的使用方法，其特征在于，步骤3)中，助剂与ESO的混合配制时间为2.5-3h。
  8. 根据权利要求7所述的聚碳酸酯的助剂添加装置的使用方法，其特征在于，步骤3)中，助剂与ESO的混合配制时间为2.5h。
  9. 根据权利要求4所述的一种聚碳酸酯的助剂液体系统的使用方法，其特征在于，步骤4)中，助剂与ESO的自循环时间为0.5-1h。
  10. 根据权利要求4所述的一种聚碳酸酯的助剂液体系统的使用方法，其特征在于，步骤4)中，混合液在加入液体存储罐前需经过取样分析，待助剂溶解的重量百分数为98％-100％时，再加入液体存储罐。
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