Rinsing system and rinsing method for regulating and controlling deacidification effect of latex solidification film

Abstract

The invention discloses a rinsing system and a rinsing method for regulating and controlling the deacidification effect of a latex solidification film, the film to be rinsed is output from the right end of the system after sequentially passing through one to multiple stages of rinsing tanks, the acid content of the film is gradually reduced after multiple times of thinning and rinsing, and the acid content of circulating water in the rinsing tanks is also gradually reduced. Acid-free make-up water enters the system from an inlet of a make-up water pump in the rear-stage rinsing tank, sequentially passes through the rear-stage rinsing tank and the front-stage rinsing tank, and then is discharged from the front-stage rinsing tank; the distribution trend of the acid content of the make-up water is consistent with the distribution trend of the acid content of the circulating water from the previous-stage rinsing tank to the last-stage rinsing tank, and a large concentration difference is maintained between the make-up water and the circulating water in each tank, so that the deacidification effect of the make-up water is fully exerted, and the purpose of saving water is achieved. The acid concentration difference value between the make-up water and the circulating water in each tank can be changed by changing the flow of the make-up water, and the deacidification effect of the film is changed.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber raw material processing, particularly to the rinsing technology of latex coagulation films, specifically a rinsing system and a rinsing method for regulating the deacidification effect of latex coagulation films. Background Art

[0002] In the production process of natural latex coagulation film-making, acid coagulation is an important step. By adding acidic substances, the latex can be transformed from a liquid state to a gel state, thus facilitating subsequent processing. The coagulated latex needs to go through a calendering process into sheets. During this period, in order to remove the residual acid, a rinsing deacidification process is adopted.

[0003] The traditional rinsing deacidification method mainly involves soaking the calendered latex sheets in a pool or a water trough, and the water in the pool is used to help remove the residual acid on the sheets. The longer the contact time between the sheets and the water, the more acid can be theoretically transferred away more effectively. This process usually involves repeatedly dipping the sheets into the water and taking them out to gradually reduce the acid content in the sheets until it reaches an acceptable level.

[0004] However, the traditional method has some obvious limitations. Firstly, due to water conservation considerations, these rinsing systems often operate in a closed-loop mode, that is, no fresh water is added to the system and wastewater is not easily discharged, or even if there is supplementation, it is in small amounts. This means that over time, the rinsing water used each time is actually accumulating the previous acid content, and its own acid concentration is gradually increasing. As a result, although this setting may be effective initially, as the number of cycles increases, the rinsing effect will decline significantly, and ultimately it may no longer be able to play an effective deacidification role.

[0005] In addition, due to the continuous change of the acid concentration of the rinsing water, it is difficult to ensure consistent product quality each time. The amount of residual acid on the sheets may fluctuate according to different batches, which poses a challenge to the stability of the product. Especially for those application scenarios with high requirements for material purity, such uncertainty is obviously unacceptable. Therefore, the deacidification result of the traditional latex film rinsing is unstable, and the residual acid content of the washed film changes with the acid concentration of the rinsing water. Summary of the Invention

[0006] To solve the deficiencies and problems existing in the above-mentioned prior art, the present invention provides a more scientific and reasonable rinsing process, namely a method and system for on-line detecting the acid content of rinsing water, dynamically regulating the acid content of rinsing water by using the make-up water flow rate, and then stably controlling the deacidification effect of the film after rinsing, achieving the purpose of not only stably controlling the processing quality of film rinsing and deacidification, but also fully utilizing the rinsing water to save water, and being able to arbitrarily regulate the balance point between the two parameters of the acid content of the film after rinsing and the consumption of rinsing water. Specifically, the present invention is implemented as follows:

[0007] A rinsing system for regulating the deacidification effect of latex coagulated film, comprising: a multi-stage rinsing tank, in which a number of rinsing tanks are arranged in series along the film conveying path, and an internal circulating water pump is provided for providing sequential step-by-step rinsing and conveying of the film; an overflow water tank is respectively arranged below the overflow drainage outlet of each rinsing tank for collecting overflow water; a make-up water pump is placed in the rinsing tank for adding the rinsing water overflowed from the subsequent rinsing tank into the previous rinsing tank; there are several sets of series-washing make-up water mechanisms, which are respectively arranged above each rinsing tank, one end is connected to the inlet of the make-up water pump of this stage, the other end is connected to the overflow water tank of the subsequent stage, and can wash the film in the previous rinsing tank, and the make-up water pump of the last stage is connected to an external water source; a pressure roller mechanism is arranged above the feeding end of each rinsing tank for pressing the film thin and feeding it into the rinsing tank; an acid content sensor is installed at the bottom of the feeding end of the frontmost rinsing tank for detecting the acid content of the water body; a controller is connected to the acid content sensor, the pressure roller mechanism, the make-up water pump, and the internal circulating water pump, and can control the operating states of the pressure roller mechanism, the make-up water pump, and the internal circulating water pump.

[0008] Further, the pressure roller mechanism includes a rubber pressing pair of rollers, a roller driving motor, and a pressure roller shaft encoder; the roller driving motor is connected to the roller shaft of the driving roller in the rubber pressing pair of rollers through a reduction device, the pressure roller shaft encoder is installed on one of the roller shafts and is connected to the controller, and can adjust the conveying roller speed of the rubber pressing pair of rollers under the control of the controller; the roller gap between each group of rubber pressing pairs of rollers decreases sequentially along the film conveying direction, and can press the film thin step by step.

[0009] Further, the series-washing make-up water mechanism includes a spraying device, which is located in the middle and rear section above each rinsing tank, and the spraying range covers the part of the film exposed above the water surface; it also includes a circulating water pipeline, the circulating water pump in the rinsing tank, one end of the circulating water pipeline is connected to the bottom of the feeding end of the rinsing tank body, the other end is connected to the bottom of the discharging end of the tank body, and under the combined action of the circulating water pump, the rinsing water in the tank forms a flow from the feeding end to the discharging end direction.

[0010] Further, the controller can detect the actual values of the speed of the pressure rollers and the acid content through sensors, compare them with the preset target values, and generate an error signal; and based on the error signal, it can regulate the speed of the pressure rollers for rubber pressing and / or the discharge of the makeup water pump, so that the actual values of the speed of the pressure rollers and the acid content approach or equal the preset target values.

[0011] Further, the controller can adjust the speed of the pressure rollers for rubber pressing at this level based on the speed parameter of the pressure rollers for rubber pressing in the previous rinsing tank and the specific compression ratio parameter of the film thickness at this level, and adjust the speed of the pressure rollers for rubber pressing in the next level based on the speed parameter of the pressure rollers for rubber pressing in this rinsing tank and the specific compression ratio parameter of the film thickness in the next level.

[0012] On the other hand, the present invention provides a rinsing method for regulating the deacidification effect of latex coagulated film: the film passes through a series of rinsing tanks connected in series from the frontmost stage to the rear stage in a strip shape, the last stage of the series of rinsing tanks is connected to an external water source, and the overflow water from the frontmost stage is discharged and uniformly treated after being discharged; and a series connection for replenishing water from the overflow water of each rinsing tank to the previous rinsing tank is formed; a pressure roller for rubber pressing is provided at the feeding end of each rinsing tank to transport the film and gradually press the film thinner; when the film passes through each rinsing tank, it will be rinsed or spray-washed by the overflow water from the subsequent stage until the last stage is rinsed or spray-washed by the external water source; the acid content in each rinsing tank body is controlled in real time, the speed of the pressure rollers for rubber pressing in each rinsing tank is adjustable and controllable, the drainage volume of the circulating water pump in each rinsing tank is adjustable and controllable; the drainage volume of the makeup water pump for replenishing the overflow water of the subsequent rinsing tank in each rinsing tank is adjustable and controllable; by mutually regulating the speed of the pressure rollers for rubber pressing, the drainage volume of the circulating water pump, and the drainage volume of the makeup water pump, the acid content in the rinsing tank can be adjusted.

[0013] Further, the regulation steps of the pressure rollers for rubber pressing include: detecting the actual speed n of the pressure rollers for rubber pressing at the frontmost stage through a pressure roller shaft encoder 1m , comparing it with the set speed value n 1s and giving an error signal e n1 , based on e n1 outputting a control signal a1, and controlling the speed n1 of the pressure rollers for rubber pressing to reach the set speed n through a roller drive motor 1s ; according to the speed n1 of the pressure rollers for rubber pressing and the inter-stage compression ratio k of the film thickness n parameter value to output a signal a n+1 , and controlling the speed n of the pressure rollers for rubber pressing through a roller drive motor n+1 .

[0014] Further, the regulation steps of the circulating water pump include: outputting a signal b n according to the speed n of the pressure rollers for rubber pressing n to control the drainage volume Q of the circulating water pump rn , so that the rinsing water flow rate in the rinsing tank matches the forward movement speed of the film; similarly, according to the speed nn+1 Output signal b n+1 Control the drainage volume Q of the circulating water pump rn+1 .

[0015] Further, the regulation step of the acid content includes: the acid content sensor detects the actual acid content S of the circulating water in the outermost rinsing tank 1m , this value is compared with the set acid content value S 1s to give an error signal e S1 , based on e S1 output signal c, control the drainage volume Q of each makeup water pump bn to send makeup water to each rinsing tank in turn with the same drainage volume Q b while changing the acid content S of the circulating water in each tank n , and finally make S1 reach the set acid content S 1s .

[0016] Working principle of the present invention: In the present invention, the latex film is cleaned through a series of rinsing tanks arranged in series. Each rinsing tank is equipped with an independent circulating water pump to maintain the flow and mixing of the water body, ensuring uniform distribution of the acid amount in the tank and the ability to transport the film. The film starts from the first-stage rinsing tank and flows through each stage in sequence until the last-stage rinsing tank. At the feeding end of each rinsing tank, there is a pressing roller mechanism, which includes a pair of rubber pressing rollers with adjustable gaps, as well as a driving motor and an encoder. The pressing rollers press the film thin and send it into the rinsing tank. By adjusting the size of the gap between the pressing rollers, the film thickness can be gradually reduced, achieving the purpose of pressing the film and increasing the contact area with the rinsing water, thereby improving the deacidification efficiency. An acid content sensor is installed in the first-stage rinsing tank to monitor the current acid concentration in the water in real time. These data are transmitted to the controller for processing and analysis. The system is also equipped with multiple supplementary water pumps, located above or beside the rinsing tanks, connected to the clean water source overflowing from the next-stage rinsing tank or an external fresh water source. The supplementary water pumps use the overflow water from the next stage to supplement the water tank of this stage, and it is supplemented in the form of spraying or flushing the film. While supplementing water, it also cleans the top surface area of the film, solving the problem that because the film is relatively light and cannot be fully immersed in water during the transportation process, resulting in poor deacidification effect of the exposed part; according to the actually detected acid content, the controller can automatically adjust the supplementary water volume to ensure that the acid concentration in each rinsing tank remains at an ideal level, effectively avoiding the problem of acid accumulation even under continuous operating conditions. Based on the collected data (such as pressing roller speed, acid content, etc.), the controller calculates the optimal operating parameters and sends instructions to each component. When it is found that the acid content in the first-stage rinsing tank deviates from the preset target, the controller will increase the supplementary water volume of each rinsing tank, and may also adjust the operating speed of the pressing rollers or the working state of the circulating pumps in the upstream rinsing tanks, so as to ensure that all links in the whole process can work together, as much as possible to maintain the stability of the acid content in the water liquid, and it is also convenient to find the best balance point between the two parameters of acid content and rinsing water consumption after film rinsing. The present invention uses the dynamic regulation of the supplementary water flow to control the acid content of the rinsing water, and then stably controls the deacidification effect of the film after rinsing, achieving both the stable control of the film rinsing and deacidification processing quality and the full utilization of the rinsing water to achieve the purpose of water saving, and can arbitrarily regulate the balance point between the two parameters of acid content and rinsing water consumption after film rinsing.

[0017] Advantageous technical effects of the present invention:

[0018] (1) High deacidification efficiency: Through the countercurrent cleaning method of multiple rinsing tanks, it ensures that the acidic substances on the film are gradually removed from the last stage to the first stage. Through the series-washing water replenishment mechanism, the overflow water from the latter rinsing tank is replenished into the previous one, forming a mechanism of step-by-step water replenishment, which can ensure the relative stability of the acid content between each rinsing tank. And each rinsing tank is equipped with an independent circulation water pump to maintain the water flow and mixing, ensuring the uniform distribution of the acid amount in the tank, and also guaranteeing the deacidification efficiency of rinsing. The water replenishment can wash the exposed top surface part of the film, increasing the contact area between the film and the rinsing water, thereby improving the deacidification effect;

[0019] (2) Stable and consistent pickling effect: The acid content sensor monitors the acid concentration in each rinsing tank in real time and feeds the data back to the controller to achieve dynamic adjustment. Based on the comparison between the actually detected acid content situation, the data collected (such as the pressure roller rotation speed, acid content, etc.) and the predetermined value, the controller will automatically adjust the makeup water volume, the pressure roller rotation speed or the working state of the circulation pump to ensure the coordinated operation of the entire system, that is, to ensure that the acid content in the rinsing tank always approaches the standard value, achieving precise control of the pressure roller rotation speed and the acid content, ensuring the stability and consistency of the film rinsing process, and realizing the homogenized production of film rinsing.

[0020] (3) Strong flexibility. The system can adjust operation parameters according to actual needs, such as the pressure roller rotation speed, the drainage volume of the circulation pump and the drainage volume of the makeup pump, to meet the deacidification requirements of different batches of films. Through the intelligent control of the controller, the best balance point can be found between the two parameters of the acid content after film rinsing and the water consumption of the rinsing water, meeting different process requirements. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the rinsing system for regulating the deacidification effect of latex coagulated film of the present invention;

[0022] Figure 2 It is a schematic diagram of the basic structure composition of the rinsing tank taking the 1st-stage rinsing tank as an example in Embodiment 1;

[0023] Figure 3 It is a schematic diagram of the pressure rubber pair roller rotation speed control in Embodiment 2;

[0024] Figure 4 It is a schematic diagram of the pressure rubber pair roller rotation speed control of the 2nd, 3rd, and 4th-stage rinsing tanks in Embodiment 2;

[0025] Figure 5 It is a schematic diagram of the drainage volume control of the circulation water pump in Embodiment 2;

[0026] Figure 6 It is a schematic diagram of the acid content control of the circulating water in the 1st-stage rinsing tank in Embodiment 2;

[0027] Figure 7Schematic diagram of another overflow water connection structure of the present invention;

[0028] Wherein:

[0029] The first rinsing tank (1), the second rinsing tank (2), the third rinsing tank (3), the fourth rinsing tank (4), the inter-tank water replenishing connecting pipe (5), the controller (6), the acid content sensor (7), the pressure roller shaft encoder (8),

[0030] The first tank body (12), the first spraying device (13), the first circulating water pipeline (15),

[0031] The second tank body (22), the second spraying device (23), the second circulating water pipeline (25);

[0032] The first supplementary water pump (14), the second supplementary water pump (24), the third supplementary water pump (34), the fourth supplementary water pump (44),

[0033] The first rubber pressing pair roller (11), the second rubber pressing pair roller (21), the third rubber pressing pair roller (31), the fourth rubber pressing pair roller (41);

[0034] The first circulating water pump (16), the second circulating water pump (26), the third circulating water pump (36), the fourth circulating water pump (46);

[0035] The first roller driving motor (18), the second roller driving motor (28), the third roller driving motor (38), the fourth roller driving motor (48);

[0036] The first overflow water tank (17), the second overflow water tank (27), the third overflow water tank (37), the fourth overflow water tank (47). Specific embodiments

[0037] In order to make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0038] Embodiment 1: The rinsing system for regulating the deacidification effect of latex coagulated film is composed of the first rinsing tank 1, the second rinsing tank 2, the third rinsing tank 3, the fourth rinsing tank 4, the inter-tank water replenishing connecting pipe 5, the controller 6, the acid content sensor 7, and the pressure roller shaft encoder 8, as Figure 1 shown.

[0039] The structure of the first rinsing tank 1 is as Figure 2As shown in the figure, it consists of a first rubber pressing pair of rollers 11, a first tank body 12, a first spraying device 13, a first makeup water pump 14, a first circulating water pipeline 15, a first circulating water pump 16, a first overflow water tank 17, and a first roller driving motor 18. The first tank body 12 is an upper-open near-rectangular tank body, horizontally placed. The first rubber pressing pair of rollers 11 is installed above the feeding end of the first tank body 12 to press the film thinner and send it into the tank. The first spraying device 13 is located in the middle and rear section above the first tank body 12 to spray makeup water into the tank to rinse the part of the film in the tank that is exposed above the water surface. The first makeup water pump 14 is connected to the first spraying device 13 to provide makeup water for it. One end of the first circulating water pipeline 15 is connected to the bottom of the feeding end of the tank body, and the other end is connected to the bottom of the discharging end of the tank body. Together with the first circulating water pump 16, it makes the rinsing water in the tank flow from the feeding end to the discharging end. The flow rate is determined by the flow rate Q r of the circulating water pump. Another function of the circulating water pump is to mix the rinsing water and the makeup water evenly. The first overflow water tank 17 is located below the feeding end of the first tank body 12, facing the overflow outlet of the tank body, to receive the rinsing water discharged from the tank body. The first roller driving motor 18 is connected to a roller shaft of the rubber pressing pair of rollers through a reduction device.

[0040] The composition, structure, and functions of the 2nd-stage rinsing tank 2, the 3rd-stage rinsing tank 3, and the 4th-stage rinsing tank 4 are the same as those of the 1st-stage rinsing tank 1. The component codes in the 2nd-stage rinsing tank 2 are the second rubber pressing pair of rollers 21, the second tank body 22, the second spraying device 23, the second makeup water pump 24, the second circulating water pipeline 25, the second circulating water pump 26, the second overflow water tank 27, and the second roller driving motor 28. The component codes in the 3rd-stage rinsing tank 3 and the 4th-stage rinsing tank 4 can be analogized in the same way and will not be elaborated here.

[0041] In the system, the 1st-stage rinsing tank 1, the 2nd-stage rinsing tank 2, the 3rd-stage rinsing tank 3, and the 4th-stage rinsing tank 4 are connected end to end in sequence to form a multi-stage series rubber pressing and rinsing channel. From the 1st-stage rinsing tank to the 4th-stage rinsing tank, the gaps between the rubber pressing pairs of rollers in each tank decrease in sequence to achieve the processing purpose of gradually pressing the film thinner. A pressure roller shaft encoder 8 is installed on one roller shaft of the first rubber pressing pair of rollers 11 in the 1st-stage rinsing tank 1, and an acid content sensor 7 is installed at the bottom of the feeding end of the first tank body 12. The inlet of the first makeup water pump 14 in the 1st-stage rinsing tank 1 is connected to the second overflow water tank 27 of the 2nd-stage rinsing tank 2 through an inter-tank makeup water connection pipe 5. In the same connection method, the inlet of the second makeup water pump 24 in the 2nd-stage rinsing tank 2 is connected to the third overflow water tank 37 of the 3rd-stage rinsing tank 3 through the inter-tank makeup water connection pipe 5. The inlet of the third makeup water pump 34 in the 3rd-stage rinsing tank 3 is connected to the fourth overflow water tank 47 of the 4th-stage rinsing tank 4 through the inter-tank makeup water connection pipe 5. The inlet of the fourth makeup water pump 44 in the 4th-stage rinsing tank 4 is connected to an external water source. The first overflow water tank 17 is connected to the ground trench. In this way, a flow direction of external water source → 4th-stage rinsing tank → 3rd-stage rinsing tank → 2nd-stage rinsing tank → 1st-stage rinsing tank → ground trench is formed, which is opposite to the flow direction of the film in the rinsing tank and is called countercurrent.

[0042] Example 2: Rinsing Method for Adjusting the Deacidification Effect of Coagulated Latex Film

[0043] The make-up water of the first-stage rinsing tank 1 is expressed by two parameters: make-up water flow rate Q b1 and acid content S b1 The circulating water is expressed by two parameters: circulating water flow rate Q r1 and acid content S1. The overflow water is expressed by two parameters: overflow water flow rate Q b1 and acid content S1. Similarly, the make-up water of the second-stage rinsing tank 2 is expressed by two parameters: make-up water flow rate Q b2 and acid content S b2 The circulating water is expressed by two parameters: circulating water flow rate Q r2 and acid content S2. The overflow water is expressed by two parameters: overflow water flow rate Q b2 and acid content S2; the make-up water of the third-stage rinsing tank 3 is expressed by two parameters: make-up water flow rate Q b3 and acid content S b3 The circulating water is expressed by two parameters: circulating water flow rate Q r3 and acid content S3. The overflow water is expressed by two parameters: overflow water flow rate Q b3 and acid content S3; the make-up water of the fourth-stage rinsing tank 4 is expressed by two parameters: make-up water flow rate Q b4 and acid content S b4 The circulating water is expressed by two parameters: circulating water flow rate Q r4 and acid content S4. The overflow water is expressed by two parameters: overflow water flow rate Q b4 and acid content S4.

[0044] The acid content signal S of the circulating water detected by the acid content sensor 7 in the first-stage rinsing tank 1m and the roll speed signal n detected by the roll shaft encoder 8 1m are sent to the controller 6; the controller 6 outputs three groups of control signals a, b, and c. The a-group signals a1~a4 respectively control the rotation speeds of the first roll drive motor 18, the second roll drive motor 28, the third roll drive motor 38, and the fourth roll drive motor 48. The b-group signals b1~b4 respectively control the rotation speeds of the first circulating water pump 16, the second circulating water pump 26, the third circulating water pump 36, and the fourth circulating water pump 46. The c signal simultaneously controls the rotation speeds of the first make-up water pump 14, the second make-up water pump 24, the third make-up water pump 34, and the fourth make-up water pump 44.

[0045] The speed control of the first rubber pressing pair roll 11 in the first-stage rinsing tank is as Figure 3 shown. The actual speed n of the first rubber pressing pair roll 11 detected by the roll shaft encoder 8 1m , this value is compared with the set speed value n 1s to give an error signal e n1 , en1 After being processed by the controller 6, the output signal a1 is used to control the rotational speed n1 of the first rubber pressing pair roller 11 through the first roller drive motor 18 to reach the set rotational speed n 1s .

[0046] The rotational speed control of the second rubber pressing pair roller 21 in the second-level rinsing tank, the third rubber pressing pair roller 31 in the third-level rinsing tank, and the fourth rubber pressing pair roller 41 in the fourth-level rinsing tank is as Figure 4 shown. The controller 6 processes the parameter values of the rotational speed n1, the film thickness, the first-level compression ratio k1, the second-level compression ratio k2, and the third-level compression ratio k3 and outputs the signal a2, and controls the rotational speed n2 of the second rubber pressing pair roller 21 through the second roller drive motor 28; similarly, the signal a3 is output, and the rotational speed n3 of the third rubber pressing pair roller 31 is controlled through the third roller drive motor 38, and the signal a4 is output, and the rotational speed n4 of the fourth rubber pressing pair roller 41 is controlled through the fourth roller drive motor 48.

[0047] The rotational speed control of the first circulating water pump 16 in the first-level rinsing tank, the second circulating water pump 26 in the second-level rinsing tank, the third circulating water pump 36 in the third-level rinsing tank, and the fourth circulating water pump 46 in the fourth-level rinsing tank is as Figure 5 shown. The controller 6 outputs the signal b1 according to the rotational speed n1 to control the drainage volume Q of the first circulating water pump 16 r1 , so that the rinsing water flow rate in the tank matches the forward movement speed of the film; similarly, the controller 6 outputs the signal b2 according to the rotational speed n2 to control the drainage volume Q of the second circulating water pump 26 r2 , outputs the signal b3 according to the rotational speed n3 to control the drainage volume Q of the third circulating water pump 36 r3 , and outputs the signal b4 according to the rotational speed n4 to control the drainage volume Q of the fourth circulating water pump 46 r4 .

[0048] The control of the acid content of the circulating water in the first-level rinsing tank is as Figure 6 shown. The acid content sensor 7 detects the actual acid content S of the circulating water in the first-level rinsing tank 1m , and after comparing this value with the set acid content value S 1s , an error signal e is given S1 , and e S1 is processed by the controller 6 and outputs the signal c to control the drainage volumes Q b1 , Q b2 , Q b3 , Q b4 of the makeup water pumps 14, 24, 34, and 44 to send the makeup water to the fourth-level rinsing tank, the third-level rinsing tank, the second-level rinsing tank, and the first-level rinsing tank in sequence with the same drainage volume Q b , and as a result, the acid contents S1, S2, S3, and S4 of the circulating water in each tank are simultaneously changed, and finally S1 reaches the set acid content S 1s .

[0049] To be rinsed film from Figure 1 The film enters the system from the left end, passes through the 1st, 2nd, 3rd and 4th rinsing tanks in sequence, and then is output from the right end of the system. After 4 times of thinning and rinsing, the acid content of the film gradually decreases, and the acid content of the circulating water in the rinsing tank also gradually decreases. The result is S1>S2>S3>S4. The make-up water enters the system from the make-up water pump 44 in the 4th rinsing tank, passes through the 4th, 3rd, 2nd and 1st rinsing tanks in sequence, and absorbs the coagulated acid of the film in each tank. The acid content gradually increases, and the result is S b1 >S b2 >S b3 >S b4 From the 1st level rinse tank to the 4th level rinse tank, the acid content distribution trend of the circulating water is consistent with the acid content distribution trend of the make-up water. In each tank, a large concentration difference is maintained between the two, which is conducive to giving full play to the deacidification effect of the make-up water and achieving the purpose of water saving. Change the make-up water flow rate Q b , can change the acid concentration difference between the supplementary water and the circulating water in each tank, thereby changing the deacidification effect of the film; constant supplementary water parameter flow rate Q b and S b4 , we can stably control the deacidification effect of the film and adjust the replenishing water flow Q b , the best balance can be found between the two parameters of acid content after film rinsing and rinsing water consumption.

[0050] For the connection of overflow water, it can also be supplemented across levels, for example, the overflow tank of the 4th-level rinsing tank is connected to the supplementary water pump of the 2nd-level rinsing tank; the overflow tank of the 3rd-level rinsing tank is connected to the supplementary water pump of the 1st-level rinsing tank.

[0051] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A rinsing system for regulating the deacidification effect of coagulated latex films, characterized in that Comprising: A multi-stage rinsing tank, which is arranged in series along the film conveying path with several rinsing tanks, and is internally provided with a circulating water pump for providing sequential and step-by-step rinsing and conveying of the film. Overflow water tanks, which are respectively arranged below the overflow drainage outlets of each rinsing tank for collecting overflow water. A make-up water pump is placed outside the rinsing tank and is used to add the rinsing water overflowed from the subsequent-stage rinsing tank into the previous-stage rinsing tank. A series-rinsing make-up water mechanism, which is provided in several sets and is respectively arranged above each stage of rinsing tank. One end is connected to the inlet of the make-up water pump of this stage, and the other end is connected to the overflow water tank of the subsequent stage, and can clean the film in this stage of rinsing tank. The make-up water pump of the last stage is connected to an external water source. A pressure roller mechanism, which is arranged above the feeding end of each rinsing tank and is used to press the film thinly and feed it into the rinsing tank. An acid content sensor, which is installed at the bottom of the feeding end of the frontmost rinsing tank for detecting the acid content of the water body. A controller, which is connected to the acid content sensor, the pressure roller mechanism, the make-up water pump, and the internal circulating water pump, and can control the operating states of the pressure roller mechanism, the make-up water pump, and the internal circulating water pump.

2. The rinsing system for regulating the deacidification effect of the coagulated latex film according to claim 1, wherein, The pressure roller mechanism includes a rubber-pressing pair of rollers, a roller driving motor, and a pressure roller shaft encoder. The roller driving motor is connected to the roller shaft of the driving roller in the rubber-pressing pair of rollers through a reduction device. The pressure roller shaft encoder is installed on one of the roller shafts and is connected to the controller, and can detect the actual rotation speed of the rubber-pressing pair of rollers and output a rotation speed signal to the controller.

3. The rinsing system for regulating the deacidification effect of the coagulated latex film according to claim 1, wherein, The series-rinsing make-up water mechanism includes a spraying device, which is located in the middle and rear section above each rinsing tank, and the spraying range covers the part of the film exposed above the water surface. It also includes a circulating water pipeline. The circulating water pump in the rinsing tank, one end of the circulating water pipeline is connected to the bottom of the feeding end of the rinsing tank body, and the other end is connected to the bottom of the discharging end of the tank body. Under the combined action of the circulating water pump, the rinsing water in the tank forms a flow from the feeding end to the discharging end direction.

4. The rinsing system for regulating the deacidification effect of the coagulated latex film according to claim 1, wherein The controller can detect the actual values of the pressure roller rotation speed and the acid content through the sensor, compare them with the preset target values, and generate an error signal. And based on the error signal, it can adjust the rotation speed of the rubber-pressing pair of rollers and / or the displacement of the make-up water pump so that the actual values of the pressure roller rotation speed and the acid content approach or equal the preset target values.

5. The rinsing system for regulating the deacidification effect of the coagulated latex film according to claim 1, characterized in that, The controller can adjust the rotation speed of the pressure roller of this stage based on the speed parameter of the rubber-pressing pair of rollers in the previous-stage rinsing tank and the specific compression ratio parameter of the film thickness of this stage, and adjust the rotation speed of the rubber-pressing pair of rollers in the subsequent stage based on the speed parameter of the rubber-pressing pair of rollers in this stage of rinsing tank and the specific compression ratio parameter of the film thickness of the subsequent stage.

6. A rinsing method for a rinsing system according to any one of claims 1-5, characterized in that Comprising: The film is in strip shape and sequentially passes through the series-connected multi-stage rinsing tanks from the frontmost stage to the subsequent stage. The make-up water of the last stage of the multi-stage rinsing tank is connected to an external water source. The overflow water of the frontmost stage is discharged and uniformly treated after discharge, and a step-by-step series-rinsing connection is formed in which the overflow water of each stage of rinsing tank replenishes the previous-stage rinsing tank from the subsequent stage. A rubber-pressing pair of rollers is provided at the feeding end of each stage of rinsing tank for conveying the film and gradually pressing the film thinly. When the film passes through each stage of rinsing tank, it will be rinsed or sprayed by the overflow water from the subsequent stage until the last stage is rinsed or sprayed by the external water source. The acid content of the rinsing water in the frontmost rinsing tank body is monitored in real time. The rotation speed of the rubber pressing pair rollers in each rinsing tank is adjustable and controllable, and the drainage volume of the circulating water pump in each rinsing tank is adjustable and controllable; the drainage volume of the make-up water pump for supplementing the overflow water of the next rinsing tank in each rinsing tank is adjustable and controllable; by mutually regulating the rotation speed of the rubber pressing pair rollers, the drainage volume of the circulating water pump and the drainage volume of the make-up water pump, the acid content of the rinsing water in each rinsing tank can be adjusted.

7. The rinsing method according to claim 6, wherein The regulation steps of the rubber pressing pair rollers include: Detect the actual rotational speed n of the rubber pressing pair of rollers through the roller shaft encoder 1m , and compare it with the set rotational speed value n 1s to give an error signal e n1 . Based on e n1 , output a control signal a1, and control the rotational speed n1 of the rubber pressing pair of rollers through the roller drive motor to reach the set rotational speed n 1s ; Give signal a according to the parameter values of the rotation speed n1 of the rubber pressing pair rollers and the film thickness level compression ratio k n and control the rotation speed n of the rubber pressing pair rollers through the roller drive motor n+1 . n+1 ​ 8. The rinsing method according to claim 7, characterized in that, The regulation steps of the circulating water pump include: According to the rotational speed n of the pressure-bonding counter-rotating rollers n Output signal b n Control the drainage volume Q of the circulating water pump rn , so that the rinsing water flow rate in the rinsing tank matches the forward movement speed of the film; similarly, According to the rotational speed n n+1 Output signal b n+1 Control the drainage volume Q of the circulating water pump rn+1 .

9. The rinsing method according to claim 7 or 8, characterized in that, The regulation steps for the acid content include: the acid content sensor detects the actual acid content S of the circulating water in the outermost rinsing tank 1m , this value is compared with the set acid content value S 1s and an error signal e is given S1 . Based on e S1 an output signal c is output to control the drainage volume Q of each makeup water pump bn With the same drainage volume Q b the makeup water is sent to each rinsing tank in sequence, and at the same time, the acid content S of the circulating water in each tank is changed n , and finally S1 reaches the set acid content S 1s .

Images