Stirring treatment system for efficiently discharging slag from under-net white water tank

Abstract

The utility model discloses an under-net white water tank efficient deslagging stirring treatment system which comprises an under-net white water tank, a multi-disc filter, an ultra-clear white water tank and a spraying water tank, and a deslagging stirrer which is driven by an external stirring motor and is used for suspending and discharging dirt deposited at the bottom is arranged in the under-net white water tank; the multi-disc filter is connected to a drainage pipeline of the under-net white water tank through a pipeline and is used for capturing and filtering impurities in the white water containing suspended stirring dirt; the spraying water tank is used for spraying the ultra-clean white water filtered in the ultra-clean white water tank to a paper machine net pressing part; the front side of the multi-disc filter is in bypass connection with a cushion slurry tank which is used for retaining fine fibers and fillers in the white water, providing cushion slurry for the multi-disc filter and improving the utilization rate of the white water; and through effective cooperation of the deslagging stirrer and the multi-disc filter, waste of water resources is reduced, the production cost is reduced, and the paper production efficiency is effectively improved.

Description

[Technical field]

[0001] The utility model relates to a slag discharge technology for a water tank in papermaking, in particular to a stirring treatment system for efficient slag discharge in a white water tank under a net. [Background technology]

[0002] In the papermaking industry, white water is used for soaking and stirring to make pulp liquid of a certain concentration, and then the pulp is hung, sucked and pressed in the pulp tank through molds to form paper products of various shapes. Moreover, in the papermaking process, white water recovery is an important indicator for energy saving and consumption reduction. Part of the chemical materials added in the papermaking process will remain in the white water for recycling. The production will also have a cycle. After a certain production cycle, the whole production system will be shut down for cleaning, including tank cleaning, to ensure product quality.

[0003] However, due to the sedimentation of paper fibers, the uniformity of the pulp will be poor. The existing stirring device cannot effectively clean the white water tank in time, and there are problems such as low stirring efficiency and insufficient stirring range. Dead corners are easily generated during the stirring process, resulting in insufficient and thorough stirring, which causes some dirt to be unable to be fully suspended and removed, and the sediment accumulates, deteriorates, and breeds bacteria, affecting the quality of white water and thus affecting the operation of the paper machine. [Contents of the utility model]

[0004] The utility model provides an under-net white water tank with efficient slag discharge stirring treatment system, which reduces the pollution of white water from paper machines to the environment, reduces the waste of water resources and reduces production costs, and effectively improves the production efficiency and production quality of paper.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A stirring treatment system for efficient slag discharge in an under-net white water tank, comprising an under-net white water tank, a multi-disc filter, an ultra-clear white water tank and a spray water tank, wherein the under-net white water tank, the multi-disc filter, the ultra-clear white water tank and the spray water tank are interconnected through pipelines;

[0007] The white water tank under the net is equipped with a slag agitator driven by an external agitator motor for suspending and discharging the dirt deposited at the bottom;

[0008] The multi-disc filter is connected to the drainage pipeline of the white water tank under the net through a pipeline, and is used to capture and filter the white water containing suspended and stirred dirt;

[0009] The spray water tank is used to spray the ultra-clear white water filtered in the ultra-clear white water pool on the screen pressing part of the paper machine;

[0010] The front side of the multi-disc filter is also bypass-connected with a cushion slurry tank for retaining fine fibers and fillers in white water, providing cushion slurry for the multi-disc filter and improving the utilization rate of white water.

[0011] Preferably, a mixing pulp pool for collecting pulp recovered after filtration by the multi-disc filter is also bypassed and connected to the pipeline on the front side of the ultra-clear water pool.

[0012] Preferably, the stirring motor is electrically connected to a three-phase power supply that drives it to rotate, and the three-phase power supply circuit is connected in sequence to a relay, an AC contactor and an air switch that control the on and off of the circuit. The corresponding circuit that controls the relay, the AC contactor and the air switch is also connected to a limited voltage protector. The circuit is also connected to a normally open start button and a normally closed stop button that remotely control the start or stop of the stirring motor and thereby control the start and stop of the slag discharge stirrer cleaning.

[0013] Preferably, the start button is also connected in parallel with a normally open bypass switch for multi-channel synchronous control with the AC contactor and for side self-locking protection control.

[0014] The beneficial effects of the utility model are:

[0015] Through the effective cooperation of the slag discharge agitator, cushion slurry tank and multi-disc filter, the dirt deposited at the bottom of the white water tank under the screen is stirred and discharged in a suspended state, effectively preventing the sediment in the white water tank under the screen from gathering, deteriorating and breeding bacteria, affecting the quality of the white water, and thus preventing equipment failure and poor operation caused by dirt accumulation.

[0016] Moreover, the cushion pulp is mixed with the paper machine white water through the cushion pulp tank and then flows to the multi-disc filter to capture and filter the white water containing suspended and stirred dirt. It can also avoid the waste of cushion pulp, increase the fiber concentration in the recovered pulp, facilitate pulp recovery, and can be directly reused in the pulp making system, while the clean water in the ultra-clear white water pool can be used for slag removal, cleaning, etc., thereby reducing the waste of water resources and reducing production costs, and effectively improving the production efficiency of paper.

Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the system principle of the utility model. [Specific implementation method]

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] Under-net white water tank 1 High-efficiency slag mixing and processing system, such as Figure 1 As shown, it includes an under-net white water tank 1, a multi-disc filter 2, an ultra-clear white water pool 3 and a spray water tank 4, which are interconnected through pipelines. The under-net white water tank 1 is equipped with a slag discharge agitator (not shown in the figure) driven by an external stirring motor 5 for suspending and discharging dirt deposited at the bottom; the multi-disc filter 2 is connected to the drainage pipeline of the under-net white water tank 1 through a pipeline, and is used to capture and filter the white water containing suspended and stirred dirt, and the spray water tank 4 is used to spray the ultra-clear white water filtered in the ultra-clear white water pool 3 on the paper machine net pressing part; the front side of the multi-disc filter 2 is also bypassed with a cushion pulp tank 6 for retaining fine fibers and fillers in the white water, which provides cushion pulp for the multi-disc filter 2 and improves the utilization rate of white water, and the pipeline on the front side of the ultra-clear white water pool 3 is also bypassed with a mixed pulp pool for collecting the recovered pulp after filtering by the multi-disc filter 2.

[0021] Continue as Figure 1 As shown, the stirring motor 5 is electrically connected to a three-phase power supply for driving its rotation, and the three-phase power supply circuit is connected in sequence to a relay 7, an AC contactor 8 and an air switch 9 for controlling the on / off of the circuit, and the corresponding circuits of the control relay 7, the AC contactor 8 and the air switch 9 are also connected to a limited voltage protector 10. The circuit is also connected to a normally open start button 11 and a normally closed stop button 12 for remotely controlling the start or stop of the stirring motor 5 and thus controlling the start and stop of the slag discharge stirrer cleaning. The start button 11 is also connected in parallel to a normally open bypass switch 13 for multi-channel synchronous control with the AC contactor 8 and for side self-locking protection control.

[0022] When in use, the slag discharge agitator can adopt a combination of various stirring modes, which can be operated through a remotely set switch. When shutting down for cleaning, the power can be turned off on site. After the cleaning is completed, the power can be turned on again to start the agitator after resetting. Through adaptive operation, the sediment in the sewage can be efficiently removed, and the chemical materials remaining in the white water can be prevented from settling at the bottom of the tank, which facilitates cleaning and improves production efficiency.

[0023] The mixing system is equipped with a remote monitoring and maintenance system to achieve remote real-time monitoring and maintenance management of the equipment, effectively improve the safety of mixing, effectively suspend and discharge the dirt deposited at the bottom, and avoid equipment failure and poor operation caused by dirt accumulation; after the dirt is effectively stirred and suspended, it is easier to be captured and processed by subsequent treatment units, improving the treatment efficiency and level of the entire sewage treatment system.

[0024] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The stirring treatment system for efficient slag discharge in the white water tank under the net is characterized by: It includes an under-net white water tank, a multi-disc filter, an ultra-clear white water tank and a spray water tank, wherein the under-net white water tank, the multi-disc filter, the ultra-clear white water tank and the spray water tank are connected to each other through pipelines; The white water tank under the net is equipped with a slag agitator driven by an external agitator motor for suspending and discharging the dirt deposited at the bottom; The multi-disc filter is connected to the drainage pipeline of the white water tank under the net through a pipeline, and is used to capture and filter the white water containing suspended and stirred dirt; The spray water tank is used to spray the ultra-clear water filtered from the ultra-clear water pool to the paper machine screen press part: The front side of the multi-disc filter is also bypassed and connected to a cushion slurry tank for retaining fine fibers and fillers in white water, which provides cushion slurry for the multi-disc filter and improves the utilization rate of white water; The stirring motor is electrically connected to a three-phase power supply for driving the stirring motor to rotate, and the three-phase power supply circuit is sequentially connected to a relay, an AC contactor and an air switch for controlling the on-off of the circuit, and a voltage limiting protector is also connected to the corresponding circuit for controlling the relay, the AC contactor and the air switch, and a normally open start button and a normally closed stop button are also connected to the circuit for remotely controlling the start or stop of the stirring motor and thus controlling the start and stop of the slag discharge stirrer cleaning; The start button is also connected in parallel with a normally open bypass switch which is multi-channel synchronously controlled with the AC contactor and is used for side self-locking protection control.

2. The stirring treatment system for efficient slag discharge of white water tank under the net according to claim 1 is characterized by: The pipeline on the front side of the ultra-clear water tank is also bypassed and connected with a mixed pulp tank for collecting the recovered pulp after filtering by the multi-disc filter.

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