Surface sizing system

Abstract

A surface sizing system relates to the technical field of papermaking, and adopts the technical scheme that the surface sizing system comprises a sizing material preparation unit, a sizing unit and a sizing material recovery unit, the sizing material preparation unit comprises a stock bin, a feeder, a dissolving tank, a first filter, an enzymatic conversion tank, a gelatinization tank, an adjusting tank, a storage tank, a second filter, a feeding tank and a third filter which are sequentially arranged; the device further comprises an amylase medicament barrel, a hot water tank and a plurality of dosing tanks; the sizing unit comprises a pair of sizing rollers and a sizing material conveying pipe, and the sizing material conveying pipe is connected with an output pipe of the third filter; the sizing material recovery unit comprises two first recovery tanks and two second recovery tanks, and the first recovery tanks and the second recovery tanks are connected to a vibrating screen, a buffer tank, a fourth filter, a sand remover and a feeding tank. The device replaces manual work to complete the preparation of the sizing material, and solves the problems of large quality fluctuation, viscosity and concentration change of the sizing material; the rubber material recovery process is perfected; multiple times of filtration are adopted in the preparation and recovery processes.

Description

Technical Field

[0001] This utility model relates to the field of papermaking technology, and in particular to a surface sizing system. Background Technology

[0002] Surface sizing is a crucial step in papermaking. By applying a thin layer of sizing agent to the surface of paper or paperboard, parameters such as surface strength, optical properties, printability, sizing degree, air permeability, water resistance, and oil resistance can be improved. However, current surface sizing systems suffer from problems such as starch raw material blockage, sizing agent quality fluctuations, and poor sizing agent purification. Furthermore, the addition of auxiliary materials during preparation relies on manual operation, resulting in significant variations in sizing agent viscosity and concentration, and the presence of numerous impurities. Additionally, overflowing sizing agent cannot be completely recovered during the sizing process, leading to substantial waste. Utility Model Content

[0003] To address the problems of starch raw material blockage, poor adhesive purification effect, reliance on manual operation, and incomplete recovery of overflowing adhesive in existing technical solutions, this utility model provides a surface sizing system.

[0004] This utility model provides the following technical solution: a surface adhesive application system, comprising:

[0005] The rubber compound preparation unit includes, in sequence, a hopper, a feeder, a dissolving tank, a first filter, an enzyme conversion tank, a gelatinization tank, an adjusting tank, a storage tank, a second filter, a feeding tank, and a third filter. It also includes an amylase reagent tank, a hot water tank, and multiple dosing tanks. The dosing pump of the amylase reagent tank is connected to the dissolving tank, the water supply pump of the hot water tank is connected to the gelatinization tank and the adjusting tank, and the dosing pumps of the multiple dosing tanks are connected to the feeding tank. The dissolving tank and the hot water tank are equipped with water supply pipes, and the gelatinization tank and the hot water tank are also equipped with heaters.

[0006] The glue application unit includes a pair of rotatable glue application rollers and a glue delivery pipe. A V-groove is formed between the pair of glue application rollers, and a gap is provided at the bottom of the V-groove. The glue delivery pipe is connected to the output pipe of the third filter.

[0007] The rubber recycling unit includes two first recycling tanks respectively disposed on the side of the pair of rubber application rollers away from each other, and two second recycling tanks respectively disposed at both ends of the V-shaped groove. The first recycling tanks and the second recycling tanks are both connected to a vibrating screen. The vibrating screen is sequentially connected to a buffer tank, a fourth filter, a sand remover, and the feeding tank.

[0008] Preferably, a crusher is provided at the bottom cone of the silo, and a vibrator is provided on the side wall of the silo.

[0009] Preferably, the amylase reagent container is placed inside an insulated cabinet.

[0010] Preferably, the drug delivery tank includes an antifoaming agent delivery tank, an sizing agent delivery tank, an aluminum sulfate delivery tank, and a paraffin powder ferrous sulfate delivery tank, wherein the paraffin powder ferrous sulfate delivery tank is also connected to a paraffin powder ferrous sulfate dissolving tank.

[0011] Preferably, each pair of the glue application rollers is provided with a glue delivery pipe extending in the axial direction, and the glue delivery pipe is provided with a plurality of glue application pipes in sequence along the length direction, the glue application pipes extending toward the V-groove.

[0012] Preferably, the third and fourth filters are pressure screens, and the screen gap width of the pressure screen is 100~200μm.

[0013] Preferably, the mesh size of the vibrating screen is 60-120 mesh.

[0014] The beneficial effects of this utility model are: the starch raw material is dissolved, modified, gelatinized, and its viscosity and concentration are adjusted by using a rubber preparation unit, and functional additives are configured to complete the preparation of the rubber material; a rubber recycling unit is set up to recycle excess rubber material and avoid waste; impurities are removed by multiple filtrations during the rubber preparation and recycling processes; and a crusher and vibrator are set up in the silo to solve the problem of starch raw material blockage. Attached Figure Description

[0015] Figure 1 This is a diagram showing the equipment connection of one embodiment of a surface coating system.

[0016] Figure 2 This is a schematic diagram of one embodiment of the adhesive application unit.

[0017] Reference numerals: 101, hopper; 1011, crusher; 102, feeder; 103, dissolving tank; 1031, amylase reagent tank; 104, first filter; 105, enzyme conversion tank; 106, gelatinization tank; 1061, hot water tank; 107, adjusting tank; 108, storage tank; 109, second filter; 110, feeding trough; 1101, defoamer dosing tank; 1102, sizing agent dosing tank; 1103, aluminum sulfate dosing tank; 1104, paraffin powder and ferrous sulfate dosing tank; 1105, paraffin powder and ferrous sulfate dissolving tank; 111, third filter; 21, sizing roller; 22, V-groove; 23, adhesive conveying pipe; 24, sizing pipe; 31, first recovery tank; 32, second recovery tank; 33, vibrating screen; 34, buffer tank; 35, fourth filter; 36, sand remover. Detailed Implementation

[0018] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0019] This utility model provides, for example Figure 1 The surface sizing system shown includes a sizing unit, a sizing unit, and a sizing recycling unit.

[0020] The rubber compound preparation unit includes, in sequence, a hopper 101, a feeder 102, a dissolving tank 103, a first filter 104, an enzyme conversion tank 105, a gelatinization tank 106, an adjustment tank 107, a storage tank 108, a second filter 109, a feeding tank 110, and a third filter 111; it also includes an amylase reagent tank 1031, a hot water tank 1061, and multiple dosing tanks. The dosing pump of the amylase reagent tank 1031 is connected to the dissolving tank 103, and the water supply pump of the hot water tank 1061 is connected to the gelatinization tank 106 and the adjustment tank 107. The dissolving tank 103 and the hot water tank 1061 are equipped with water supply pipes, and the gelatinization tank 106 and the hot water tank 1061 are also equipped with heaters.

[0021] The hopper 101 has a cylindrical upper part and a conical lower part, with a crusher 1011 installed inside the conical hopper. A vibrator is also installed on the outer wall of the hopper 101. The crusher 1011 and vibrator are used to prevent starch from getting stuck in the conical hopper and difficult to discharge. The crusher 1011 can be an arc-shaped crusher, and the vibrator can be an electromagnetic vibrator. A dust collector is also installed on the top of the hopper 101. A feeder 102 is located at the discharge port of the conical hopper and feeds the starch into the dissolving tank 103; a metering screw feeder can be used.

[0022] Dissolving tank 103, first filter 104, enzyme conversion tank 105, gelatinization tank 106, adjusting tank 107, storage tank 108, second filter 109, feeding tank 110, and third filter 111 are connected in sequence by pipelines, and corresponding valves are installed on the pipelines, such as... Figure 1 As shown, the starch-water mixture flows under pressure between adjacent devices via a transfer pump or by gravity flow due to elevation difference. The dissolving tank 103, enzyme conversion tank 105, gelatinization tank 106, adjusting tank 107, storage tank 108, and feeding tank 110 are all stirred tanks.

[0023] Starch is mixed with water in dissolving tank 103 to form starch paste, which is then mixed with amylase from amylase reagent tank 1031. After initial filtration by first filter 104, it is sent to enzyme conversion tank 105 to complete enzymatic hydrolysis and denaturation reaction. It then enters gelatinization tank 106 and is heated to a starch liquid state before entering adjustment tank 107. Hot water tank 1061 sends hot water to gelatinization tank 106 and adjustment tank 107 to adjust the viscosity and concentration of starch liquid to preset values. Then, starch liquid enters storage tank 108 for buffering, and after secondary filtration by second filter 109, it enters feeding tank 110.

[0024] The adhesive preparation unit also includes multiple dosing tanks, and the dosing pumps of these tanks are connected to the loading tank 110. Specifically, the dosing tanks include an antifoaming agent dosing tank 1101, a sizing agent dosing tank 1102, an aluminum sulfate dosing tank 1103, and a paraffin powder ferrous sulfate dosing tank 1104. The antifoaming agent dosing tank 1101 and the sizing agent dosing tank 1102 can respectively feed the antifoaming agent and the surface sizing agent into the loading tank 110 via diaphragm pumps. The aluminum sulfate dosing tank 1103 is connected to a transfer pump and a filter via pipelines to filter the aluminum sulfate solution before sending it into the loading tank 110. The paraffin powder ferrous sulfate dosing tank 1104 is also connected to a paraffin powder ferrous sulfate dissolving tank 1105. The paraffin powder and ferrous sulfate are dissolved in water in the paraffin powder ferrous sulfate dissolving tank 1105 and then sent to the paraffin powder ferrous sulfate dosing tank 1104. After being pumped by the transfer pump into the filter for filtration, it enters the loading tank 110.

[0025] Starch solution is mixed with defoamer, surface sizing agent, aluminum sulfate, paraffin powder, ferrous sulfate and other functional additives in feeding tank 110 to complete the preparation of adhesive. The adhesive is then filtered again by the third filter 111 and sent to the sizing unit to complete the sizing.

[0026] Preferably, the amylase reagent container 1031 is placed inside an insulated cabinet to maintain the enzyme activity at a suitable temperature.

[0027] Preferably, the first and second filters can be dual filters, one in use and one on standby, with a filter mesh size of 60-120 mesh; the third and fourth filters can be pressure screens with a screen slit width of 100-200 μm.

[0028] The sizing unit can refer to relevant technologies. In this embodiment, the sizing unit includes a pair of rotatable sizing rollers 21, with a V-groove 22 formed between the pair of sizing rollers. A gap is left at the bottom of the V-groove 22 for paper to pass through. The paper is sandwiched between the pair of sizing rollers 21 and passes through the V-groove 22. Each pair of sizing rollers 21 is provided with an adhesive delivery pipe 23 extending axially. Both adhesive delivery pipes 23 are connected to the output pipe of the third filter 111, and multiple sizing tubes 24 are sequentially arranged along the length of the adhesive delivery pipes, extending into the V-groove. Adhesive is delivered to the adhesive delivery pipes 23, sprayed by the sizing tubes 24, and then collects in the V-groove 22 on both sides of the paper, performing excessive continuous surface sizing on the paper continuously advancing through the gap. Figure 2 As shown.

[0029] The rubber recovery unit includes two first recovery troughs 31 respectively disposed on the side of a pair of application rollers 21 away from each other, and two second recovery troughs 32 respectively disposed at both ends of a V-shaped groove 22. The pair of application rollers 21 rotate relative to each other, and the first recovery troughs 31 are provided on the water-spraying surfaces of both rollers away from each other to recover the rubber material splashed out by the application rollers 21; excess rubber material in the V-shaped groove 22 flows from its two ends to the two second recovery troughs 32 for recovery.

[0030] Both the first and second recovery tanks 31 and 32 are connected to the vibrating screen 33 for initial filtration of the recovered rubber material. The outlet of the vibrating screen 33 is sequentially connected to the buffer tank 34, the fourth filter 35, and the sand remover 36 for secondary filtration and sand removal of the rubber material, which is then returned to the feeding tank 110 for recycling. Two vibrating screens can be installed, one for use and one for backup, with a screen mesh size of 60-120 mesh. The fourth filter 35 can be a pressure screen with a screen gap width of 100-200 μm. The sand remover 36 can be a cyclone sand remover.

[0031] All components in the rubber recycling unit are connected by pipes and equipped with corresponding valves; the rubber flows under pressure in each component through a delivery pump or by gravity flow using the elevation difference.

[0032] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A surface sizing system, characterized in that, include: The rubber compound preparation unit includes, in sequence, a hopper, a feeder, a dissolving tank, a first filter, an enzyme conversion tank, a gelatinization tank, an adjusting tank, a storage tank, a second filter, a feeding tank, and a third filter. It also includes an amylase reagent tank, a hot water tank, and multiple dosing tanks. The dosing pump of the amylase reagent tank is connected to the dissolving tank, the water supply pump of the hot water tank is connected to the gelatinization tank and the adjusting tank, and the dosing pumps of the multiple dosing tanks are connected to the feeding tank. The dissolving tank and the hot water tank are equipped with water supply pipes, and the gelatinization tank and the hot water tank are also equipped with heaters. The glue application unit includes a pair of rotatable glue application rollers and a glue delivery pipe. A V-groove is formed between the pair of glue application rollers, and a gap is provided at the bottom of the V-groove. The glue delivery pipe is connected to the output pipe of the third filter. The rubber recycling unit includes two first recycling tanks respectively disposed on the side of the pair of rubber application rollers away from each other, and two second recycling tanks respectively disposed at both ends of the V-shaped groove. The first recycling tanks and the second recycling tanks are both connected to a vibrating screen. The vibrating screen is sequentially connected to a buffer tank, a fourth filter, a sand remover, and the feeding tank.

2. The surface sizing system according to claim 1, characterized in that, The bottom cone of the silo is equipped with a crusher, and the side wall of the silo is equipped with a vibrator.

3. The surface sizing system according to claim 1, characterized in that, The amylase reagent container is placed inside an insulated cabinet.

4. The surface sizing system according to claim 1, characterized in that, The drug delivery tank includes an antifoaming agent delivery tank, an sizing agent delivery tank, an aluminum sulfate delivery tank, and a paraffin powder ferrous sulfate delivery tank. The paraffin powder ferrous sulfate delivery tank is also connected to a paraffin powder ferrous sulfate dissolving tank.

5. A surface sizing system according to claim 1, characterized in that, Each pair of the glue application rollers is provided with a glue delivery pipe extending in the axial direction. Multiple glue application pipes are arranged sequentially along the length of the glue delivery pipes, and the glue application pipes extend toward the V-groove.

6. A surface sizing system according to claim 1, characterized in that, The third and fourth filters are pressure screens, and the screen gap width of the pressure screen is 100~200μm.

7. A surface sizing system according to claim 1, characterized in that, The vibrating screen has a mesh size of 60-120.

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