Steel belt type coating homogeneous film continuous manufacturing method
阅读说明：本技术 一种钢带式涂布法均相膜连续制造方法 (Steel belt type coating homogeneous film continuous manufacturing method ) 是由 王彬 潘礼德 于 2019-09-25 设计创作，主要内容包括：本发明涉及一种钢带式涂布法均相膜连续制造方法,包含如下步骤：涂布工序,将均相膜浆液料均匀涂布在匀速前进的循环钢板带上,在钢板带上形成一层涂布层；加热去溶工序,将涂布层通过加热溶剂回收系统进行加热聚合反应,并将均相膜浆液料内含有的溶剂进行去溶回收,形成膜体；冷却剥离工序,通过对膜体进行冷却,将膜体从钢板带上自行剥离；卷取工序,将剥离后的成品均相膜卷取成体,涂布工序、加热去溶工序、冷却剥离工序在匀速前进的循环钢板带的上层钢板带上连续进行。本发明环保可靠,剥离效果更好,得到的均相膜更完整,提高了均相膜成品的合格率,且整个操作大幅度降低了人员的操作,更具自动化。(The invention relates to a steel belt coating method homogeneous film continuous manufacturing method, which comprises the following steps: a coating procedure, namely uniformly coating the homogeneous film slurry on a circulating steel plate belt advancing at a constant speed to form a coating layer on the steel plate belt; a heating desolventizing step, namely heating the coating layer for polymerization reaction through a heating solvent recovery system, and desolventizing and recovering the solvent contained in the homogeneous membrane slurry to form a membrane body; a cooling and peeling step of cooling the film body to peel the film body from the steel sheet belt; and a coiling step, namely coiling the stripped finished homogeneous film into a finished product, and continuously performing a coating step, a heating and dissolving removing step and a cooling and stripping step on an upper steel plate strip of the circulating steel plate strip advancing at a constant speed. The method is environment-friendly and reliable, has better stripping effect, obtains more complete homogeneous membrane, improves the qualification rate of the finished homogeneous membrane, greatly reduces the operation of personnel through the whole operation, and has more automation.)
1. A steel belt coating homogeneous film continuous manufacturing method is characterized by comprising the following steps:
a coating procedure, namely uniformly coating the homogeneous film slurry on a circulating steel plate belt advancing at a constant speed to form a coating layer on the steel plate belt;
a heating desolventizing step, namely heating the coating layer for polymerization reaction through a heating solvent recovery system, and desolventizing and recovering the solvent contained in the homogeneous membrane slurry to form a membrane body;
a cooling and peeling step of cooling the film body to peel the film body from the steel sheet belt;
a winding step of winding the peeled homogeneous film as a product,
the coating process, the heating and dissolving process and the cooling and stripping process are continuously carried out on the upper steel plate strip of the circulating steel plate strip advancing at a constant speed.
2. The method for continuously manufacturing the homogeneous film by the steel strip coating method according to claim 1, wherein the heating solvent recovery system comprises a heating fan, an induced draft fan and a condensing device which are sequentially communicated, the heating fan blows directly towards the homogeneous film slurry, and the operation process of the heating solvent recovery system is as follows:
introducing hot air through a heating fan to evaporate a solvent contained in the homogeneous membrane slurry;
the evaporated solvent is recycled to a condensing device through an induced draft fan;
the solvent with the evaporated solvent is condensed by the circulating cooling water of the condensing device to form a solvent condensate for recycling.
3. The homogeneous film continuous production method according to claim 1, wherein a coating device and a doctor blade are provided in the coating step, the coating device is provided at a front end of the doctor blade, the coating device includes a stock tank, a metering pump, and a coater, a coating port of the coater is provided at an upstream end of the steel strip, the coating port is provided in a widthwise direction of the steel strip, the stock tank contains the homogeneous film slurry mixed with a solvent, the metering pump is connected between the stock tank and the coater for controlling a discharge capacity of the stock tank, and the coating step is specifically performed by:
controlling the discharge metering of the raw material tank by a metering pump according to the production requirement of the homogeneous film, the discharge speed of the coating port and the width and thickness of the homogeneous film;
the thickness and the width of the coating layer are adjusted by adjusting the height and the width of the scraping blade relative to the steel plate strip according to the production requirement of the homogeneous film.
4. The method according to claim 1, wherein the cooling and peeling step comprises a cooling air device including an air cooler and cooling air nozzles uniformly distributed on the bottom surface of the steel strip, the cooling air device cools the bottom surface of the steel strip through the cooling air nozzles, and the film adhered to the steel strip is cooled by heat transfer of the steel strip and peeled from the steel strip.
5. The method as claimed in claim 1, wherein the steel strip is circularly transferred by the drum rolling at the front and rear ends, and the tension adjuster for adjusting the tension of the circulating steel strip is installed at both sides of the drum at the front end, and the serpentine detector is installed on the circulating steel strip at the front end, and the serpentine detector tracks the zero offset of the steel strip in real time, and the tension adjuster at both sides is controlled and adjusted according to the offset.
6. The continuous manufacturing method of a steel strip coating homogeneous film according to claim 1, further comprising a detection step of detecting whether the homogeneous film is qualified or not between the cooling and peeling step and the winding step, wherein the detection step comprises a thickness detector and LED lamps, the thickness detector is uniformly distributed in the width direction of the homogeneous film, the thickness detector detects whether the thickness of the homogeneous film in the width direction is uniform, the LED lamps are uniformly laid below the homogeneous film, and the homogeneous film is illuminated from bottom to top to detect whether the homogeneous film has a defect in appearance.
7. The method of claim 1, wherein the solvent has a boiling point lower than that of water and lower than that of other components in the homogeneous film slurry.
Technical Field
The invention relates to a production process of a homogeneous film, in particular to a continuous manufacturing method of a homogeneous film by a steel belt coating method.
Background
The ion exchange membrane is loaded with groups capable of performing ion exchange, such as a cation exchange membrane loaded with strong acidic sulfonic acid groups (exchangeable cations) and an anion exchange membrane loaded with strong basic quaternary amine groups (exchangeable anions). The unique ion exchange characteristic of the ion exchange membrane enables the ion exchange membrane to play an important role in the aspects of material separation, clean production, environmental protection, energy conversion and the like, and becomes an important component part for realizing the strategy of economic sustainable development. Ion exchange membranes can be classified into heterogeneous membranes and homogeneous membranes according to their structures. The heterogeneous membrane is formed by bonding ion exchange resins together through an adhesive, the membrane surface resistance is large, the compactness is poor, the membrane resistance of the homogeneous membrane is lower, the compactness is high, the current efficiency is higher, the operation energy consumption of the heterogeneous membrane is greatly lower than that of the heterogeneous membrane, as the processing capacity of one homogeneous membrane group device can replace 2-5 heterogeneous membrane group devices, and the volume of one homogeneous membrane group device is far smaller than that of one heterogeneous membrane, the occupied area is far smaller than that of the heterogeneous membrane, the application of the homogeneous membrane in the field of electrodialysis is wider and wider.
In the preparation method of the homogeneous phase film, there is a coating type production method, for example, patent document CN201510165078.3 discloses a method for preparing a homogeneous phase ion exchange film of an all vanadium battery by a slurry coating method, which is to coat the homogeneous phase film slurry on an aluminum plate, while the aluminum material has low hardness and is easy to change, the patent document passes through an upper aluminum plate and a lower aluminum plate, and pressurizes the aluminum plate, the final peeling needs manual operation, the process has no continuity, and needs manual operation, and the formed homogeneous phase film has the problem that the thickness of the same film is different due to film damage or uneven coating by manual peeling, and the solvent contained in the homogeneous phase film slurry directly diffuses into the atmosphere due to heating, thereby causing certain pollution to the atmosphere and causing the problem of disposable utilization of the solvent.
Disclosure of Invention
The invention aims to solve the technical problem of providing a steel belt coating method homogeneous film continuous manufacturing method which is more environment-friendly and improves the product percent of pass aiming at the problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a steel belt coating homogeneous film continuous manufacturing method comprises the following steps:
a coating procedure, namely uniformly coating the homogeneous film slurry on a circulating steel plate belt advancing at a constant speed to form a coating layer on the steel plate belt;
a heating desolventizing step, namely heating the coating layer for polymerization reaction through a heating solvent recovery system, and desolventizing and recovering the solvent contained in the homogeneous membrane slurry to form a membrane body;
a cooling and peeling step of cooling the film body to peel the film body from the steel sheet belt;
a winding step of winding the peeled homogeneous film as a product,
the coating process, the heating and dissolving process and the cooling and stripping process are continuously carried out on the upper steel plate strip of the circulating steel plate strip advancing at a constant speed.
Further, heating solvent recovery system is including the heating blower, draught fan and the condensing equipment that communicate in proper order, the heating blower is directly blown towards looks membrane thick liquids, heating solvent recovery system's operating procedure as follows:
introducing hot air through a heating fan to evaporate a solvent contained in the homogeneous membrane slurry;
the evaporated solvent is recycled to a condensing device through an induced draft fan;
the solvent with the evaporated solvent is condensed by the circulating cooling water of the condensing device to form a solvent condensate for recycling.
Further, a coating device and a scraper are arranged in the coating process, the coating device is positioned at the front end of the scraper, the coating device comprises a raw material tank, a metering pump and a coating device, a coating port of the coating device is positioned at the upstream end of the steel plate strip and is arranged in the width direction of the steel plate strip, the raw material tank is filled with homogeneous film slurry mixed with a solvent, the metering pump is connected between the raw material tank and the coating device and is used for controlling the discharge capacity of the raw material tank, and the specific process of the coating process comprises the following steps:
controlling the discharge metering of the raw material tank by a metering pump according to the production requirement of the homogeneous film, the discharge speed of the coating port and the width and thickness of the homogeneous film;
the thickness and the width of the coating layer are adjusted by adjusting the height and the width of the scraping blade relative to the steel plate strip according to the production requirement of the homogeneous film.
And the cooling and stripping process comprises a cold air device, wherein the cold air device comprises an air cooler and cold air nozzles uniformly distributed on the bottom surface of the steel plate strip, the cold air nozzles cool the bottom surface of the steel plate strip, and a film body adhered to the steel plate strip is cooled through heat transfer of the steel plate strip and is stripped from the steel plate strip.
Further, the steel plate belt rolls through the drums at the front end and the rear end to carry out circular conveying, tension regulators for regulating the tension of the circular steel plate belt are installed on two sides of the drum at the front end, a snake-shaped detector is arranged on the circular steel plate belt at the front end, the zero offset of the steel plate belt is tracked in real time through the snake-shaped detector, and the tension regulators at two sides are controlled and regulated according to the offset.
Further, still include by the qualified detection process of detecting homogeneous film between the process is peeled off in the cooling and the process is reeled, the detection process includes thickness detector and LED light, thickness detector evenly distributed on the broad width direction of homogeneous film, whether thickness through thickness detector detection homogeneous film broad width is unanimous, LED light is evenly laid under the homogeneous film, through from up the illumination down, detects whether there is the defect in the outward appearance of homogeneous film.
Further, the solvent has a boiling point lower than that of water and lower than that of other components in the homogeneous membrane slurry.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the circulating steel plate belt is used as a generation carrier of the homogeneous film, the processes of coating, heating polymerization and cooling stripping are sequentially carried out on the circulating steel plate belt, and the solvent in the homogeneous film slurry is recycled in the heating polymerization stage, so that the whole preparation process is environment-friendly and reliable, the dissolved homogeneous film is quickly cooled by the steel plate belt, the formed film is automatically stripped from the steel plate belt carrier, the stripping is simplified, the stripping effect is better, the obtained homogeneous film is more complete, and the coated homogeneous film slurry is scraped by a scraper in the coating stage, so that the thickness of the homogeneous film is more consistent, and the qualified rate of the homogeneous film finished product is improved by matching with thickness detection and appearance detection of the homogeneous film by an LED illuminating lamp, and the whole operation is greatly reduced, and is more automatic.
Drawings
FIG. 1 is a flow chart of a steel strip coating homogeneous film continuous manufacturing method of the present invention
FIG. 2 is a schematic diagram of a simple structure of an apparatus for performing a homogeneous film continuous manufacturing method according to an embodiment of the present invention.
FIG. 3 is a schematic structural view of the heating desolventizing stage in FIG. 2.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, fig. 2 and fig. 3, a steel strip coating homogeneous film continuous manufacturing method includes the following steps:
a coating procedure, namely uniformly coating the homogeneous film slurry on a circulating steel plate belt advancing at a constant speed to form a coating layer on the steel plate belt;
a heating desolventizing step, namely heating the coating layer for polymerization reaction through a heating solvent recovery system, and desolventizing and recovering the solvent contained in the homogeneous membrane slurry to form a membrane body;
a cooling and peeling step of cooling the film body to peel the film body from the steel sheet belt;
a film thickness detection process, wherein the thickness of the film body in width is detected by a thickness detector, the thickness detector transmits real-time detection data to a PLC control terminal, the PLC control terminal compares whether the detected data has a large error with the preset film thickness, and if the detected data exceeds the error range, the film thickness is judged to be unqualified;
an appearance detection step of illuminating the film below the film to observe whether the film has an appearance defect, and if so, determining that the film is unqualified;
and a winding step of winding the qualified film product into a body.
The coating process, the heating and dissolving process and the cooling and stripping process are continuously and sectionally carried out on the upper steel plate strip of the circulating steel plate strip advancing at a constant speed, so that the homogeneous film production has continuity.
The heating solvent recovery system comprises a heating fan, an induced draft fan and a condensing device which are sequentially communicated, wherein the heating fan blows directly towards the phase film slurry.
The operation procedure of the heating solvent recovery system is as follows:
introducing hot air through a heating fan to evaporate a solvent contained in the homogeneous membrane slurry;
the evaporated solvent is recycled to a condensing device through an induced draft fan;
the solvent after will having the evaporation through condensing equipment's recirculated cooling water condenses, retrieves after forming the solvent condensate and recycles, and the steam after going out the solvent is vapor basically, in the atmosphere of discharging, can not go the atmosphere and cause the pollution, makes whole production process more have the feature of environmental protection.
The coating device is arranged at the front end of the scraping blade, the coating device comprises a raw material tank, a metering pump and a coating device, a coating port of the coating device is arranged at the upstream end of the steel plate strip and is arranged in the width direction of the steel plate strip, homogeneous film slurry mixed with a solvent is filled in the raw material tank, and the metering pump is connected between the raw material tank and the coating device and is used for controlling the discharge capacity of the raw material tank.
The coating process comprises the following specific steps:
controlling the discharge metering of the raw material tank by a metering pump according to the production requirement of the homogeneous film, the discharge speed of the coating port and the width and thickness of the homogeneous film;
the thickness and the width of the coating layer are adjusted by adjusting the height and the width of the scraping blade relative to the steel plate strip according to the production requirement of the homogeneous film.
The cooling and stripping process comprises a cold air device, wherein the cold air device comprises an air cooler and cold air nozzles uniformly distributed on the bottom surface of the steel plate strip, the bottom surface of the steel plate strip is cooled through the cold air nozzles, and a film body adhered to the steel plate strip is cooled through heat transfer of the steel plate strip and is stripped from the steel plate strip. Because the surface of the steel plate belt is smooth, the temperature control is stable, the film body can be conveniently stripped by controlling the temperature, and the adhesion of the film body stripped by the solvent to the steel plate belt is greatly reduced.
The steel plate belt rolls through the drums at the front end and the rear end to carry out circular conveying, tension regulators for regulating the tension of the circular steel plate belt are installed on the two sides of the drum at the front end, the snake-shaped detectors are arranged on the circular steel plate belt at the front end, the zero offset of the steel plate belt is tracked in real time through the snake-shaped detectors, the tension regulators at the two sides are regulated according to offset control, and straight running of the steel plate belt is guaranteed in real time through automatic pressurization and pressure relief control of the tension regulators.
The above solvent has a boiling point lower than that of water and lower than that of other components in the homogeneous film slurry in order to satisfy the production effect.
The embodiment designs an implementation device of a homogeneous film continuous manufacturing method by a steel strip coating method according to the method, which comprises a steel strip 100 and a drum wheel 200 driving the steel strip 100 to circularly roll, wherein the drum wheel 200 is respectively arranged at two circulating ends, the upper layer steel strip 100 is divided into a coating section 110, a heating desolventizing section 120 and a cooling stripping section 130 according to the production process, and the thickness detection section 300, the appearance detection section 400 and the coiling section 500 are continuously connected after being separated from the steel strip 100.
Tension hydraulic devices 111 are provided on both side end faces of the drum 200 on the coating section 110, and the tension of the steel plate belts 100 on both sides is adjusted by pressure relief of the tension hydraulic devices 111. The steel plate belt 100 on one side of the coating section 110 is provided with the snake-shaped detector 112, the snake-shaped detector 112 detects the zero offset of the steel plate belt 100 in real time, the snake-shaped detector 112 and the PLC control end carry out data transmission, and the PLC control end calculates and controls the tension oil pressure device 111 to adjust the tension of the steel plate belt 100 on the corresponding side in real time.
The coating port 113 is arranged at the forefront end of the coating section 110 in the width direction of the steel plate strip 100, the coating port 113 is communicated with the metering pump 115 and the raw material tank 116, according to the production requirement of the homogeneous film 600, the homogeneous film slurry flows into the coating port 113 from the raw material tank 116 according to the flow controlled by the metering pump 115, the operation front end of the coating port 113 is provided with a doctor blade 114, when the coated homogeneous film slurry passes through the doctor blade 114 and is scraped by the doctor blade 114, and the doctor blade 114 can adjust the height and the width.
The heating desolventizing section 120 comprises a
The cooling stripping section 130 is provided with an air cooler 131 and a plurality of cold air nozzles 132, the cold air nozzles 132 are uniformly distributed on the bottom surface of the steel plate strip 100 of the cooling stripping section 130, the air cooler 131 introduces air from the outside and performs refrigeration, cold air directly blows the bottom surface of the steel plate strip 100 through the cold air nozzles 132 to simultaneously cool the steel plate strip 100 and the homogeneous film 600, the adhesion of the dissolved homogeneous film 600 to the steel plate strip 100 is greatly reduced, the homogeneous film 600 is easy to strip from the steel plate strip 100, the homogeneous film 600 automatically strips the steel plate strip 100 after the steel plate strip 100 circulates back, and the appearance damage of the stripped homogeneous film 600 is greatly reduced.
A pair of thickness detectors 310 is arranged on the thickness detection section 300 in the up-down direction of the peeled homogeneous film 600, a plurality of pairs of thickness detectors 310 are distributed in the width direction of the homogeneous film 600, the thickness detectors 310 are connected with the PLC control end, and whether the thickness of the homogeneous film 600 meets the production requirement or not is judged in real time through comparison calculation of the PLC control end. If not, the roll of homogeneous film 600 is determined to be rejected.
The homogeneous film 600 is irradiated with a strong cold light source 410 under the peeled homogeneous film 600 in the observation section 400, and then whether or not the homogeneous film 600 is damaged in appearance is observed, and if so, the roll of homogeneous film 600 is determined to be defective.
According to the invention, the circulating steel plate belt is used as a generation carrier of the homogeneous film, the processes of coating, heating polymerization and cooling stripping are sequentially carried out on the circulating steel plate belt, and the solvent in the homogeneous film slurry is recycled in the heating polymerization stage, so that the whole preparation process is environment-friendly and reliable, the dissolved homogeneous film is quickly cooled by the steel plate belt, the formed film is automatically stripped from the steel plate belt carrier, the stripping is simplified, the stripping effect is better, the obtained homogeneous film is more complete, and the coated homogeneous film slurry is scraped by a scraper in the coating stage, so that the thickness of the homogeneous film is more consistent, and the qualified rate of the homogeneous film finished product is improved by matching with thickness detection and appearance detection of the homogeneous film by an LED illuminating lamp, and the whole operation is greatly reduced, and is more automatic.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications or improvements can be made to the present invention without departing from the principle of the present invention, and these are considered to be within the protection scope of the present invention.
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