Papermaking retention aid dissolving system

Abstract

A papermaking retention aid dissolving system relates to the technical field of papermaking, and adopts the technical scheme that the papermaking retention aid dissolving system comprises a feeding device, the feeding device comprises a feeding groove, a spiral feeding machine is arranged at the bottom of the feeding groove, the spiral feeding machine is provided with a jet flow disperser, and the jet flow disperser is connected with the feeding groove. The jet flow disperser comprises a jet flow cavity, a purging annular pipe and a wetting annular pipe, wherein the purging annular pipe and the wetting annular pipe surround the jet flow cavity. The jet flow cavity extends in the vertical direction, the top of the jet flow cavity is connected with a discharging port of the spiral feeder, and an outlet is formed in the bottom of the jet flow cavity. The blowing annular pipe is connected with an air delivery pipe, the wetting annular pipe is arranged between the blowing annular pipe and the outlet, the wetting annular pipe is connected with a water delivery pipe, and the blowing annular pipe and the wetting annular pipe are each provided with a plurality of channels communicated with the jet flow cavity in the circumferential direction. According to the utility model, the retention aid can be effectively prevented from caking to block the jet flow cavity, and the retention aid is prevented from splashing to cause dust raising when sprayed out from the outlet of the jet flow cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to papermaking technical field especially relates to a papermaking retention aid dissolving system. BACKGROUND

[0002] Retention aid as an important additive in papermaking industry, its good dissolving dispersibility is directly related to subsequent papermaking retention effect, paper quality and production cost. Under the existing production technical conditions, the automatic dissolving dispersion of retention aid has two ways of wind delivery and water delivery, the retention aid and wind or water are mixed together, after the delivery pipeline, can fall into the dissolving dispersion tank, after long time use or meet humid weather, retention aid is easy to form the agglomerate in the delivery pipeline, not only block the delivery pipeline, still influence the concentration after dissolving, influence papermaking retention effect, paper quality and production cost. UTILITARY MODEL CONTENT

[0003] In view of the problem that retention aid is easy to form the agglomerate in the delivery pipeline in the prior art scheme, the utility model provides a papermaking retention aid dissolving system.

[0004] The utility model provides the following technical scheme: a papermaking retention aid dissolving system, including feeding device, the feeding device includes feed tank, the bottom of feed tank is provided with screw feeder, the screw feeder is provided with jet disperser, the jet disperser includes jet cavity and the blow -off annular pipe and wet annular pipe around jet cavity, jet cavity extends along the vertical direction, the top of jet cavity is connected with the discharge port of screw feeder, and the bottom is provided with the outlet, the blow -off annular pipe is connected with gas pipe, the wet annular pipe is arranged between blow -off annular pipe and the outlet, and the wet annular pipe is connected with water pipe, the blow -off annular pipe and wet annular pipe all are provided with a plurality of passageways along the circumferential direction and are communicated with jet cavity.

[0005] Preferably, the top of the feed tank is provided with a cover plate, and the cover plate is provided with two inlet openings.

[0006] Preferably, it further includes a dissolving tank arranged at the bottom of the outlet, the dissolving tank is provided with a water inlet pipe, the water pipe is connected with the water inlet pipe, and the dissolving tank is further provided with a first conveying pump.

[0007] Preferably, the first conveying pump is connected to a storage tank through a conveying pipe, the storage tank is provided with a second conveying pump, and the second conveying pump is provided with a conveying pipe.

[0008] Preferably, the conveying pipes of the first conveying pump and the second conveying pump are both provided with a pipeline filter, and the conveying pipe of the second conveying pump is further provided with a flow meter.

[0009] Preferably, the feeding tank is further provided with a material level sensor, and the dissolving tank and the storage tank are each provided with two liquid level sensors with different heights.

[0010] The papermaking retention aid dissolving system has the advantages that the jet chamber extends in the vertical direction, the powder retention aid is fed into the jet chamber by the screw feeder, and the retention aid is blown away from the jet chamber to complete feeding under the blowing of compressed air, so that the retention aid is effectively prevented from caking and blocking the jet chamber, and the retention aid is wetted by clean water to prevent splashing and dust raising when the retention aid is sprayed out of the jet chamber outlet. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a schematic view of one embodiment of the papermaking retention aid dissolving system.

[0012] Figure 2 It is a schematic view of one embodiment of the papermaking retention aid dissolving system.

[0013] Reference signs: 10, feeding device; 11, feeding tank; 111, feeding inlet; 12, screw feeder; 13, jet disperser; 131, jet chamber; 132, blowing annular pipe; 133, wetting annular pipe; 134, gas conveying pipe; 135, water conveying pipe; 20, dissolving tank; 21, water inlet pipe; 22, first conveying pump; 30, storage tank; 31, second conveying pump; 40, filter; 50, flow meter; 60, material level sensor; 70, liquid level sensor. DETAILED DESCRIPTION

[0014] The embodiments of the papermaking retention aid dissolving system will be described in detail below with reference to the accompanying drawings and reference signs, so that those skilled in the art can implement the papermaking retention aid dissolving system after reading the description. It should be understood that the specific embodiments described herein are only used to explain the papermaking retention aid dissolving system, and do not limit the papermaking retention aid dissolving system.

[0015] The papermaking retention aid dissolving system provided by the papermaking retention aid dissolving system has the advantages that the jet chamber extends in the vertical direction, the powder retention aid is fed into the jet chamber by the screw feeder, and the retention aid is blown away from the jet chamber to complete feeding under the blowing of compressed air, so that the retention aid is effectively prevented from caking and blocking the jet chamber, and the retention aid is wetted by clean water to prevent splashing and dust raising when the retention aid is sprayed out of the jet chamber outlet. Figures 1-2 The papermaking retention aid dissolving system has the advantages that the jet chamber extends in the vertical direction, the powder retention aid is fed into the jet chamber by the screw feeder, and the retention aid is blown away from the jet chamber to complete feeding under the blowing of compressed air, so that the retention aid is effectively prevented from caking and blocking the jet chamber, and the retention aid is wetted by clean water to prevent splashing and dust raising when the retention aid is sprayed out of the jet chamber outlet.

[0016] Please refer to Figure 2 The feeding device 10 comprises the feeding tank 11, the screw feeder 12 and the jet disperser 13 connected in sequence.

[0017] The feed tank 11 is generally a conical tank body, and a cover plate is arranged at the top of the tank body to prevent sundries from entering. The cover plate is provided with two inlet openings 111, one of which is always open, and the other is provided with a flip cover that can open or close the inlet opening. The two inlet openings are suitable for two different types of retention aids. A material level sensor 60 can also be arranged at the bottom of the feed tank 11. When the material level of the retention aid decreases to a preset height, a signal is sent to the controller to remind the operator to add material. The controller can refer to related technologies. The screw feeder 12 is arranged at the discharge opening of the feed tank 11. A screw quantitative feeder with metering function can be used to convey a preset weight of powder retention aid from the feed tank 11 to the jet dispenser 13.

[0018] The jet dispenser 13 includes a jet cavity 131, a blowing annular pipe 132 surrounding the jet cavity 131, and a wetting annular pipe 133. The main body of the jet dispenser 13 is a tubular structure, and the inner cavity is the jet cavity 131. The jet cavity 131 extends in the vertical direction, and the top is connected with the discharge opening of the screw feeder 12. The bottom is provided with an outlet. After the retention aid enters the jet cavity, it falls downward and exits the jet cavity from the outlet to complete the feeding, which can reduce the risk of blockage in the jet cavity. The blowing annular pipe 132 is connected with a gas conveying pipe 134, which is provided with a plurality of passages in the circumferential direction and is in communication with the jet cavity 131. Compressed air enters the jet cavity 131 from the gas conveying pipe 134 to promote the retention aid to exit from the outlet of the jet cavity by using positive pressure. The wetting annular pipe 133 is arranged between the blowing annular pipe 132 and the outlet, and the wetting annular pipe 133 is connected with a water conveying pipe 135. The wetting annular pipe 133 is also provided with a plurality of passages in the circumferential direction and is in communication with the jet cavity 131. The water conveying pipe 135 sprays clean water into the jet cavity 131 through the wetting annular pipe 133 to wet the retention aid, preventing splashing and dust generation when the retention aid is sprayed out of the outlet of the jet cavity.

[0019] The dissolving tank 20 is arranged at the bottom of the outlet and generally adopts a stirring tank. The dissolving tank 20 is provided with a water inlet pipe 21 for adding an appropriate amount of water into the dissolving tank 20. The water conveying pipe 135 of the feeding device is connected with the water inlet pipe 21. The water conveying pipe 135 and the water inlet pipe 21 are both provided with valves. The water inlet pipe 21 is also provided with a flow meter. The valves can be on-off valves or regulating valves, and the valves and the flow meter are both electrically connected to the controller. When the flow of water input into the dissolving tank 20 reaches a preset value, the controller closes the valve to stop water input. The dissolving tank 20 is also provided with a first conveying pump 22 connected to a storage tank 30 through a conveying pipe. The storage tank 30 can also adopt a stirring tank, and the bottom of the storage tank 30 is provided with a second conveying pump 31 provided with a conveying pipe.

[0020] Under the stirring of the dissolving tank 20, a proper amount of retention aid is dissolved and dispersed in water to form a retention aid solution, and is delivered to the storage tank 30 through the first delivery pump 22, and when needed, the retention aid solution is delivered to the papermaking system through the second delivery pump 31.

[0021] Preferably, the delivery pipes of the first delivery pump 22 and the second delivery pump 31 are provided with pipeline filters 40, which can be 80-120 mesh filter screens to filter out solid impurities, and the pipeline filters 40 adopt a double-filter structure of one in use and one in standby, facilitating replacement and cleaning. The delivery pipe of the second delivery pump 31 is further provided with a flow meter 50.

[0022] Preferably, the dissolving tank 20 and the storage tank 30 are provided with multiple liquid level sensors 70 of different heights, which transmit signals to the controller when the liquid level reaches the preset height, and the controller executes corresponding instructions. When the liquid level in the dissolving tank 20 reaches the preset low liquid level, the controller starts the feeding device 10 and the valves on the water delivery pipe 135 and the water inlet pipe 21 to start feeding; when the liquid level in the dissolving tank 20 reaches the preset high liquid level, the feeding is stopped after the last operation of retention aid feeding and water feeding is completed. When the liquid level in the storage tank 30 reaches the preset low liquid level, the controller starts the first delivery pump 22 to deliver the prepared retention aid solution to the storage tank 30, and stops the first delivery pump 22 when the liquid level reaches the preset high liquid level.

[0023] The above is one or more embodiments of the present application, which are described in more detail and in more detail, but should not be understood as limiting the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A papermaking retention aid dissolution system comprising a dosing device, characterized in that, The feeding device comprises a feeding tank, a screw feeder is arranged at the bottom of the feeding tank, the screw feeder is provided with a jet disperser, the jet disperser comprises a jet cavity, a blowing annular pipe and a wetting annular pipe surrounding the jet cavity, the jet cavity extends in the vertical direction, the top of the jet cavity is connected with a discharge port of the screw feeder, and the bottom of the jet cavity is provided with an outlet, the blowing annular pipe is connected with a gas conveying pipe, the wetting annular pipe is arranged between the blowing annular pipe and the outlet, the wetting annular pipe is connected with a water conveying pipe, and the blowing annular pipe and the wetting annular pipe are both provided with a plurality of passages in the circumferential direction and in communication with the jet cavity.

2. A papermaking retention aid dissolving system according to claim 1, characterized in that, The top of the feeding tank is provided with a cover plate, and the cover plate is provided with two feeding ports.

3. A papermaking retention aid dissolving system according to claim 1, wherein, A dissolving tank is further arranged at the bottom of the outlet, the dissolving tank is provided with a water inlet pipe, the water conveying pipe is connected with the water inlet pipe, and the dissolving tank is further provided with a first conveying pump.

4. A papermaking retention aid dissolving system according to claim 3, wherein, The first conveying pump is connected with a storage tank through a conveying pipe, the storage tank is provided with a second conveying pump, and the second conveying pump is provided with a conveying pipe.

5. A papermaking retention aid dissolving system according to claim 4, wherein, The conveying pipes of the first conveying pump and the second conveying pump are both provided with a pipeline filter, and the conveying pipe of the second conveying pump is further provided with a flow meter.

6. A papermaking retention aid dissolving system according to claim 3, wherein, The feeding tank is further provided with a material level sensor, and the dissolving tank and the storage tank are both provided with two liquid level sensors with different heights.

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