Wet strength agent adding device

Abstract

The utility model discloses a wet strength agent adding device which comprises a wet strength agent stock solution storage tank, a pulp forming pool and a sizing pump, the pulp forming pool is connected with the sizing pump through a first pipeline, and the wet strength agent stock solution storage tank is connected with the first pipeline through a second pipeline; the first pipeline is provided with a first valve, the first valve is located between the first pipeline access port and the pulp forming pool, and the second pipeline is provided with a second valve and a wet strength agent adding pump; the wet strength agent stock solution storage tank is further connected with a measuring cylinder liquid level meter, a third valve is arranged between the wet strength agent stock solution storage tank and the measuring cylinder liquid level meter, and the measuring cylinder liquid level meter is made of transparent materials and used for reading the liquid level of the wet strength agent stock solution storage tank. The wet strength agent stock solution is directly used for adding, the wet strength agent dilution process is omitted, the production cost is reduced, the production process is simplified, and the production efficiency is improved; the wet strength agent is directly conveyed into the pipeline between the slurry forming pool and the slurry feeding pump instead of being added, so that the addition amount of the wet strength agent is adjusted more accurately and timely.

Description

TECHNICAL FIELD

[0001] The utility model relates to papermaking technical field especially relates to a wet strength agent adding device. BACKGROUND

[0002] When producing handkerchief paper and facial paper, the life paper paper machine needs to add wet strength agent according to papermaking specification, and in the production process, the paper physical property wet tensile strength needs to be ensured within the qualified range, and the wet strength cost needs to be reduced. Figure 1 As shown in the figure, the current wet strength agent is added from the wet strength agent storage tank to the wet strength dilution tank, and then diluted with water, and the original solution is diluted to 10% for use. During the dilution process, the stirrer is continuously stirred to ensure uniformity. According to the amount of wet strength agent required, the wet strength pump is manually opened to add the wet strength agent to the pulp mixing tank, and then mixed with the pulp and transported to the pulp pool. The pulp is then pumped to the head box for forming, pressing, drying, creping and winding to produce paper for testing the paper physical property. Two 3-ton wet strength dilution tanks are provided for two paper machines, one for standby and one for use. The wet strength agent is diluted to 10% for use. According to the requirements of different paper types for wet strength, about 15-18 barrels of wet strength agent need to be diluted every day. In this process, the cost of water is relatively high due to the dilution of the wet strength agent, the effect of the diluted wet strength agent is poor, the usage is relatively high, and the cost of the wet strength agent is relatively high. The continuous stirring of the stirrer leads to waste of electricity consumption and high failure rate of the stirrer, increasing maintenance costs. The two dilution tanks occupy a large space and are difficult to clean, increasing the workload of the personnel.

[0003] In addition, if the paper physical property wet tensile strength is not qualified, the production personnel need to adjust the wet strength addition amount immediately. From adjusting the addition amount to the mixing tank, and then to the pulp pool for stirring and mixing, the whole process is relatively complicated and time-consuming. Because the pulp pool tank has 60% liquid level, it takes about 30-45 minutes to completely reach the adjusted amount of wet strength agent, which leads to slow adjustment speed, increases the amount of unqualified paper physical property, and affects the quality of the paper or the excess of the paper physical property leads to high cost. If wet strength paper is changed to non-wet strength paper, the pulp in the tank will affect the physical property of the changed paper, for example: when changing from wet strength paper to non-wet strength paper, the wet strength agent is stopped, but the pulp in the tank still contains residual wet strength agent, which will affect the water solubility of the non-wet strength paper; if the wet strength agent is stopped 30 minutes before changing to non-wet strength paper, the wet strength of the wet strength paper produced during this period will be low and the quality will be unqualified.

[0004] In the production process, the liquid level meter of the wet strength agent stock solution storage tank is displayed on the control system screen, but once the liquid level meter is damaged and abnormal, the remaining amount of the wet strength agent stock solution cannot be known, and it is inconvenient to add the wet strength agent; if the pipeline is broken and the wet strength agent leaks, it cannot be found in time, and there is a risk of breaking the wet strength agent. The utility model discloses a wet strength agent adding device

[0005] The utility model discloses a wet strength agent adding device

[0006] Technical scheme: in order to solve the above problems, the utility model discloses a wet strength agent adding device, including wet strength agent stock solution storage tank, slurry pool, upper slurry pump, the slurry pool is connected with upper slurry pump through first pipeline, and the wet strength agent stock solution storage tank is connected with first pipeline through second pipeline, be equipped with first valve on first pipeline, and first valve is located between first pipeline access and slurry pool, be equipped with second valve and wet strength agent adding pump on second pipeline.

[0007] Further, the wet strength agent stock solution storage tank is also connected with the measuring cylinder liquid level meter, and a third valve is arranged between the wet strength agent stock solution storage tank and the measuring cylinder liquid level meter, the measuring cylinder liquid level meter is made of transparent material, and is used for reading the liquid level of the wet strength agent stock solution storage tank.

[0008] Further, the control system is also provided with a production parameter input box, and the control system controls the wet strength agent adding pump according to the production parameters.

[0009] Further, the production parameters include paper type name code, grammage, wet strength agent consumption per ton of paper and wet strength agent concentration.

[0010] Further, the wet strength agent stock solution storage tank is provided with a liquid level meter, the control system is also used for reading the liquid level meter data, and the control system is also provided with an alarm signal, which sends an alarm when the liquid level meter data is lower than the preset value.

[0011] Further, the first valve is arranged on one side close to the outlet of the wet strength agent stock solution storage tank, a fourth valve is also arranged between the first valve and the wet strength agent adding pump, and the fourth valve is opened and closed synchronously with the wet strength agent adding pump.

[0012] Further, the first valve and the fourth valve are pneumatic valves, and the second valve and the third valve are manual valves.

[0013] Further, the second pipeline is also provided with a check valve, and the check valve is located between the wet strength agent adding pump and the first pipeline.

[0014] Further, the second pipeline is also provided with a wet strength flowmeter.

[0015] Beneficial effects: Compared with the prior art, the significant advantages of this utility model are (1) the wet strength agent is added directly, eliminating the wet strength agent dilution process, reducing production costs, simplifying the production process, and improving production efficiency; (2) the wet strength agent addition point is changed to be directly transported to the pipeline between the pulping tank and the pulping pump, making the adjustment of the wet strength agent addition amount more accurate and timely. Once the wet strength agent is stopped, the wet strength agent cannot enter the pulp immediately, so that the non-wet strength base paper has no wet strength and the water solubility will not be affected by the partial wet strength; (3) the addition of a measuring cylinder level gauge facilitates on-site inspection of the wet strength agent level. When the electronic level gauge is damaged or abnormal, the wet strength agent level information can also be obtained; (4) by setting an alarm signal, the hidden danger of wet strength agent interruption due to low wet strength agent level and failure to add in time, as well as the hidden danger of wet strength agent interruption due to pipeline rupture and leakage. Attached Figure Description

[0016] Figure 1 For existing wet strength agent addition processes;

[0017] Figure 2 This is a schematic diagram of the overall structure of the wet strength agent adding device of this utility model;

[0018] Figure 3 The process for adding the wet strength agent according to this utility model is described. Detailed Implementation

[0019] like Figure 2 and Figure 3 As shown, a wet strength agent adding device in this embodiment includes a wet strength agent stock solution storage tank 1, a slurry forming tank 2, a slurry pump 3, a graduated cylinder level gauge 6, and a control system. The slurry forming tank 2 and the slurry pump 3 are connected via a first pipe 4, and the wet strength agent stock solution storage tank 1 and the first pipe 4 are connected via a second pipe 5. The wet strength agent stock solution storage tank 1 is also connected to the graduated cylinder level gauge 6, and a third valve 7 is provided between the wet strength agent stock solution storage tank 1 and the graduated cylinder level gauge 6. The third valve 7 is normally closed. The graduated cylinder level gauge 6 is marked with a scale. When it is necessary to check the remaining amount of wet strength agent, the third valve 7 is opened to check the liquid level in the graduated cylinder. At the same time, the third valve 7 facilitates maintenance and replacement of the graduated cylinder.

[0020] The first valve 41 is arranged on the first pipeline 4 between the inlet of the first pipeline 4 and the pulp pool 2. The second pipeline 5 is provided with the second valve 51, the fourth valve 52, the wet strength agent adding pump 53, the wet strength flowmeter 54 and the check valve 55 arranged in sequence from the outlet side of the wet strength agent stock tank 1 to the side of the second pipeline 5. The first valve 41 and the fourth valve 52 are pneumatic valves, and the second valve 51 and the third valve 7 are manual valves. The fourth valve 52 is synchronously opened and closed with the wet strength agent adding pump 53. When the wet strength pump is started, the pneumatic valve is opened. When all the wet strength pumps are stopped, the pneumatic valve is closed, so as to avoid the wet strength agent in the wet strength tank from entering the pulp pool under the action of gravity after all the wet strength pumps are stopped. The check valve 55 can avoid the pulp being pressed into the wet strength agent pipeline and the wet strength agent storage tank due to the abnormal wet strength pump and the high pressure of the sizing pipeline.

[0021] The wet strength agent stock tank 1 is provided with a liquid level meter. The control system can read the data of the liquid level meter. The control system is also provided with an alarm signal. When the data of the liquid level meter is lower than the preset value, the alarm signal sends an alarm to remind the production personnel that the wet strength agent liquid level is low, and the wet strength agent needs to be added according to the remaining amount of the wet strength agent and the papermaking situation, so as to avoid the hidden danger of the wet strength agent being broken due to the wet strength agent not being added in time, and the hidden danger of the pipeline being broken and leaking the wet strength agent. The control system is also provided with a production parameter input box for inputting paper type name code, grammage, wet strength agent consumption per ton of paper, wet strength agent concentration and other production parameters. The control system controls the wet strength agent adding pump 53 according to the production parameters.

[0022] Specifically, the wet strength agent adding pump 53 is interlocked with the sizing pump 3 and the paper grade name code corresponding to the papermaking, when the sizing pump 3 is in the open state and the papermaking is changed to the wet strength paper grade name, the wet strength pump 53 will be automatically opened in the automatic state; when the sizing pump 3 is in the stop state or the non-wet strength paper grade name is selected, the wet strength agent adding pump 53 will be automatically stopped in the automatic state; it is avoided that the personnel forget to open and stop the wet strength agent adding pump when starting and stopping the machine or changing the papermaking from the wet strength paper grade to the non-wet strength paper grade. The flow can be calculated according to the wet strength agent ton paper consumption and the wet strength agent concentration, and the calculated amount and the actual amount are compared, when the difference is more than ±0.5ml / min, an alarm is given to avoid that the original paper physical property is abnormal due to the abnormal wet strength system, no actual flow or large flow difference of the wet strength agent. The wet strength agent ton paper consumption input box is interlocked with the corresponding wet strength agent papermaking specification in the automatic state, that is, when the papermaking is changed to the wet strength paper grade, the wet strength agent ton paper consumption setting box automatically captures the middle line of the wet strength agent papermaking specification corresponding to the paper grade, and displays the middle line, and the required flow of the wet strength agent is automatically calculated in the automatic state, the actual flow of the wet strength agent approaches the required flow, and reaches the required flow, and the wet strength agent ton paper consumption is manually adjusted according to the actual physical property when the original paper physical property is detected; it is avoided that the personnel forget to set the wet strength agent ton paper consumption when the papermaking is changed to the wet strength paper grade, so that the original paper physical property is unqualified, the qualified rate of the original paper is improved, and the working efficiency is improved when the papermaking is changed to the paper grade.

[0023] The utility model discloses directly use wet strength agent stock solution to add, save wet strength agent dilution flow, reduce production cost, and simplify production flow, improve production efficiency. Change wet strength agent adding point to directly transport into the pipeline between the pulp pool and the sizing pump, make the adjustment of wet strength agent adding amount more accurate and timely, once stop using wet strength, wet strength agent can not enter the slurry immediately, make non-wet strength original paper no wet strength, and water-soluble does not affect because of having part wet strength. Increase the setting cylinder liquid level meter, and the wet strength agent liquid level is convenient for on-site inspection, when the electronic liquid level meter is damaged or abnormal, the wet strength agent liquid level information can also be obtained. Still through setting alarm signal, avoid the hidden danger of broken wet strength agent because of not adding in time when the wet strength agent liquid level is low, and the hidden danger of broken medicine because of the pipeline rupture and leakage of wet strength agent.

Claims

1. A wet strength agent adding device characterized by comprising: The wet strength agent stock solution storage tank (1), the slurry tank (2), the sizing pump (3), the first pipeline (4) is connected between the slurry tank (2) and the sizing pump (3), the second pipeline (5) is connected between the wet strength agent stock solution storage tank (1) and the first pipeline (4), the first valve (41) is arranged on the first pipeline (4), the first valve (41) is arranged between the first pipeline (4) and the slurry tank (2), the second valve (51) and the wet strength agent adding pump (53) are arranged on the second pipeline (5).

2. The wet strength agent adding device according to claim 1, wherein The wet strength agent stock solution storage tank (1) is also connected with the cylinder liquid level meter (6), the third valve (7) is arranged between the wet strength agent stock solution storage tank (1) and the cylinder liquid level meter (6), the cylinder liquid level meter (6) is made of transparent material and is used for reading the liquid level of the wet strength agent stock solution storage tank (1).

3. The wet strength agent adding device according to claim 1, wherein The control system is also provided, the production parameter input box is arranged on the control system, and the control system controls the wet strength agent adding pump (53) according to the production parameters.

4. The wet strength agent adding device according to claim 3, wherein The production parameters include paper type code, grammage, wet strength agent consumption per ton of paper and wet strength agent concentration.

5. The wet strength agent adding device according to claim 3, wherein The liquid level meter is arranged in the wet strength agent stock solution storage tank (1), the control system is also used for reading the liquid level meter data, and the alarm signal is arranged on the control system, and the alarm signal sends an alarm when the liquid level meter data is lower than the preset value.

6. The wet strength agent adding device according to claim 1, wherein The first valve (41) is arranged on one side close to the outlet of the wet strength agent stock solution storage tank (1), the fourth valve (52) is arranged between the first valve (41) and the wet strength agent adding pump (53), and the fourth valve (52) is opened and closed synchronously with the wet strength agent adding pump (53).

7. The wet strength agent adding device according to claim 6, wherein The first valve (41) and the fourth valve (52) are pneumatic valves, and the second valve (51) and the third valve (7) are manual valves.

8. The wet strength agent adding device according to claim 1, wherein The check valve (55) is arranged on the second pipeline (5) and is arranged between the wet strength agent adding pump (53) and the first pipeline (4).

9. The wet strength agent adding device according to claim 1, wherein The wet strength flowmeter (54) is arranged on the second pipeline (5).

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