Method for recycling slurry residues through chutes between inclined nets

Abstract

The invention provides a method for recycling slurry residues through chutes between inclined nets, which comprises the following steps that the slurry residues from the inclined nets flow into a recycling device and are recycled under the action of self gravity of the slurry residues, the invention further provides the recycling device for the method, and the recycling device comprises the chutes, a flushing pipeline, a recycling branch pipeline, a recycling main pipeline and a recycling pool, the chutes are arranged below the inclined net, the cross section of each chute is of a triangular structure, a flushing pipeline is arranged on each chute, a discharge port formed in the bottom of each chute is communicated with a recycling branch pipeline, the recycling branch pipelines are connected with a recycling main pipeline, the recycling main pipeline is connected with a recycling pool, and the recycling pool is connected with a discharging port formed in the bottom of each chute. Slurry residues are automatically recycled by means of gravity through the stainless steel chute, so that efficiency is improved, labor is saved, and operation cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking inclined screen wastewater treatment, in particular to a method for recovering pulp residue in a chute between inclined screens. Background Art

[0002] The main reasons for pulp residue in the papermaking process are as follows: During the pulping process, plant fibers (such as trees, wheat straw, bamboo, cotton, reed, etc.) will discharge impurities outside the fiber such as plant skin, dust, sand, lignin, etc. When using recycled fibers (such as waste paper), impurities such as packing nails, packaging film, plastic particles, glass, and plastic in the packaging box will be discharged; sludge will be produced during sewage treatment, which contains impurities such as lost fibers, dust, sand, etc. that are not removed during pulping; and in order to achieve better softness, toilet paper manufacturers will add virgin short wood pulp fibers or other chemical additives to the pulp. These additives may fall off during use, forming paper powder or paper residue.

[0003] At present, the pulp residue produced in the papermaking process is mainly recycled by belt conveyors. However, belt conveyors that recycle inclined-net pulp residue consume electricity, require human supervision, are prone to wear and tear, require frequent maintenance, have high operation and maintenance costs, and have low operating efficiency.

[0004] In view of this, we propose a method for recovering pulp residue in an intermediate chute to solve the above problems. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a method for recovering pulp residue by using a chute between inclined screens, which utilizes a stainless steel chute to automatically recover the pulp residue by gravity, thereby improving efficiency, saving labor, and reducing operating costs.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] The method for recovering pulp residue by using an inclined mesh chute comprises the following steps:

[0008] The pulp residue coming down from the inclined net flows into the recovery device and is recovered by the pulp residue's own gravity.

[0009] The present invention further provides a recovery device for the above method, comprising a chute, a flushing pipeline, a recovery branch pipeline, a recovery main pipeline and a recovery pool, wherein the chute is arranged below the inclined net, the cross section of the chute is a triangular structure, the upper part of the chute is provided with a flushing pipeline, the discharge port arranged at the bottom of each chute is connected to the recovery branch pipeline, the recovery branch pipeline is connected to the recovery main pipeline, and the recovery main pipeline is connected to the recovery pool,

[0010] Adjacent points of two adjacent chutes correspond to the water outlets of the flushing pipeline.

[0011] Furthermore, a control valve is provided at the water outlet of each flushing pipe.

[0012] Specifically, the hypotenuse of the chute is in a semicircular structure, which is conducive to the concentration of water and pulp residue at the bottom of the arc, thereby increasing fluidity.

[0013] Specifically, the recovery main pipeline is arranged in an inclined structure, which is conducive to the pulp and slag flowing into the recovery pool along the inclined pipe wall.

[0014] Specifically, a pneumatic control valve is installed on the recovery main pipeline.

[0015] Specifically, the chute is made of stainless steel.

[0016] Beneficial effects of the present invention:

[0017] The present invention utilizes the gravity of the pulp residue on the inclined net to make it flow into the chute along the inclined surface. The pulp residue flowing into the chute continues to flow downward along the slope of the chute by the gravity of the pulp residue due to the inclined surface of the chute, flows to the discharge port at the bottom of the pulp trough, and then flows into the recovery pool through the recovery pipe. The entire recovery process only relies on the gravity of the pulp residue to realize automatic recovery, saves labor, has no power loss, and reduces operating costs.

[0018] The present invention arranges a flushing pipeline above the chute, and when the slurry residue has insufficient fluidity, water can be sprayed at the top of the chute to assist the slurry residue to flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of the overall structure of the recovery device of the present invention;

[0020] Figure 2 It is a schematic diagram of the side cross-sectional structure of the chute of the recovery device of the present invention;

[0021] As shown in the figure: 100. Inclined screen, 1. Chute, 2. Flushing pipe, 3. Recovery branch pipe, 4. Recovery main pipe, 5. Recovery pool. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1

[0026] like Figure 1 and 2 As shown, the recovery device used in the pulp and slag recovery method of the present invention comprises a chute 1, a flushing pipeline 2, a recovery branch pipeline 3, a recovery main pipeline 4 and a recovery pool 5. The chute 1 is made of stainless steel and is arranged below the inclined net 100. The cross section of the chute 1 is a triangular structure, and both sides of the chute 1 are arranged as hypotenuses. The hypotenuses of the chute 1 are in a semicircular structure, which is conducive to the concentration of water and pulp and slag at the bottom of the arc, thereby increasing fluidity.

[0027] A flushing pipe 2 is provided on the upper part of the chute 1. The adjacent points of two adjacent chutes 1 correspond to the water outlets of the flushing pipe 2, and a control valve is provided at the water outlet of each flushing pipe 2 to control the water output.

[0028] The discharge port arranged at the bottom of each chute 1 is connected to the recovery branch pipe 3, the recovery branch pipe 3 is connected to the recovery main pipe 4, and the recovery main pipe 4 is connected to the recovery pool 5, wherein a pneumatic control valve is installed on the recovery main pipe 4, and the slurry recovery main pipe 4 is arranged in an inclined structure, which is conducive to the slurry residue flowing into the recovery pool 5 along the inclined pipe wall.

[0029] Example 2

[0030] In practical application, the slope of the chute is set as large as possible, preferably above 20°. When the inclined net 100 is 25 meters long, the chute 1 is designed to be 26.5 meters long, 1.8 meters high, 0.3 meters wide and 3 mm thick. The interior of the chute 1 is designed to be relatively smooth. The gravity of the pulp residue on the inclined net 100 causes it to flow into the chute 1 along the inclined surface. The pulp residue flowing into the chute 1 continues to flow downward along the slope of the chute 1 by the gravity of the pulp residue due to the inclined surface of the chute, and flows to the discharge port at the bottom of the pulp tank and then flows into the recovery tank 5 through the recovery pipe. The entire recovery process only relies on the gravity of the pulp residue to achieve automatic recovery, saving labor, and no power loss, thereby reducing operating costs.

[0031] A flushing pipe 2 is arranged above the chute 1 so that when the fluidity of the slurry is insufficient, water can be sprayed at the top of the chute to assist the flow of the slurry.

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for recovering pulp residue by using an inclined mesh chute, comprising the following steps: The pulp residue coming down from the inclined net flows into the recovery device and is recovered by the pulp residue's own gravity.

2. A recovery device for use in claim 1, characterized in that It includes a chute, a flushing pipe, a recovery branch pipe, a recovery main pipe and a recovery pool. The chute is arranged below the inclined net. The cross-section of the chute is a triangular structure. The upper part of the chute is provided with a flushing pipe. The discharge port arranged at the bottom of each chute is connected with the recovery branch pipe. The recovery branch pipe is connected with the recovery main pipe, and the recovery main pipe is connected with the recovery pool.

3. The recovery device according to claim 2, characterized in that Adjacent points of two adjacent chutes correspond to the water outlets of the flushing pipeline.

4. The recovery device according to claim 3, characterized in that A control valve is arranged at the water outlet of each flushing pipeline.

5. The recovery device according to claim 2, characterized in that The hypotenuse of the chute is in a semicircular structure.

6. The recovery device according to claim 2, characterized in that The recovery main pipeline is arranged in an inclined structure.

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