Novel washing system for fiber precursor production

Abstract

The utility model relates to a novel washing system for fiber precursor production. The novel washing system comprises a plurality of washing tank bodies, a main heat exchanger and an auxiliary heat exchanger, a plurality of sub-tank bodies are arranged in the washing tank body at intervals, sub-liquid inlets in the bottoms of the sub-tank bodies are connected with a main liquid inlet pipeline, a fixing plate is installed on the tops of the sub-tank bodies, a plurality of sprayers are arranged on the fixing plate at intervals, the bottom face of the inner side of the washing tank body is an inclined face, and a liquid outlet connected with a main liquid outlet pipeline is formed in the lower end of the washing tank body. The main liquid inlet pipeline and the main liquid outlet pipeline are both arranged at the bottom of the washing tank body, the main liquid inlet pipeline is connected with cold fluid outlets of the main heat exchanger and the auxiliary heat exchanger, and the main liquid outlet pipeline is connected with cold fluid inlets of the main heat exchanger and the auxiliary heat exchanger; the method can ensure the continuous operation of the washing system, and greatly improves the production efficiency of the fiber precursor; in addition, the washing liquid is sprayed to the fiber precursors in a spraying mode, chemical residues and impurities in the fiber precursors can be effectively removed, and the washing effect is good.

Description

Technical Field

[0001] The utility model belongs to the field of fiber production equipment, and specifically relates to a novel water washing system for fiber raw yarn production. Background Art

[0002] During fiber precursor production, the fibers ejected from the spinneret need to be washed in a water washing tank after being drawn by water or steam. In existing water washing tanks, the heat exchanger is directly installed independently at the bottom of each tank body, that is, the water in each tank body is heat exchanged separately. For example: Chinese patent CN 102677200 A discloses "Water washing tank and application of polyacrylonitrile primary fiber". This method has the following disadvantages: (1) Since the drawn fibers may need to pass through multiple water washing tanks, if the heat exchanger at the bottom of one of the tank bodies is damaged, the water washing operation cannot be performed normally and the machine must be shut down for maintenance, which greatly reduces the production efficiency of the fiber precursor; (2) Directly immersing the fiber precursor in the water washing liquid of the water washing tank for washing cannot effectively remove the chemical residues and impurities in the fiber, and the water washing effect is poor. Summary of the invention

[0003] The purpose of the utility model is to provide a new type of water washing system for fiber precursor production, which can realize centralized water supply and centralized discharge of washing liquid, play an overall circulation role, and multiple washing tanks are provided with hot water washing liquid by any one of the main heat exchanger and the standby heat exchanger. This method can ensure the uninterrupted operation of the water washing system and greatly improve the production efficiency of the fiber precursor; in addition, the washing liquid is sprayed onto the fiber precursor in a spraying manner, which can effectively remove chemical residues and impurities in the fiber precursor, and the washing effect is good.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A novel water washing system for fiber precursor production comprises a plurality of water washing tanks, a main heat exchanger and an auxiliary heat exchanger arranged in sequence along the drawing direction of the fiber precursor; wherein a plurality of sub-tanks are arranged at intervals in the water washing tank, and a sub-liquid inlet at the bottom of the sub-tank is connected to a main liquid inlet pipeline through a branch liquid inlet pipeline and a main liquid inlet pipeline, a fixing plate is installed on the top of the sub-tank, a plurality of sprayers are arranged at intervals on the fixing plate, and a spray hole is arranged on the fixing plate at a position opposite to the nozzle of the sprayer, and the washing liquid in the sub-tank passes through the spray hole and is sprayed from the nozzle of the sprayer; the inner bottom surface of the water washing tank The water washing tank body is provided with an inclined surface, a liquid outlet is arranged at a lower end of the inner bottom surface of the water washing tank body, and a filter cover plate assembly for covering the liquid outlet cover is arranged near the liquid outlet; the liquid outlets of the plurality of water washing tank bodies are connected through a branch liquid outlet pipeline, a main liquid outlet pipeline and a total liquid outlet pipeline, and the end of the total liquid outlet pipeline is respectively connected to the cold fluid inlet of the main heat exchanger and the auxiliary heat exchanger through a tee and two branch pipelines; the total liquid inlet pipeline and the total liquid outlet pipeline are both arranged at the bottom of the water washing tank body, and the liquid inlet of the total liquid inlet pipeline is respectively connected to the cold fluid outlet of the main heat exchanger and the auxiliary heat exchanger through a tee and two branch pipelines;

[0006] The end of the sprayer in contact with the fiber precursor is provided with a fiber precursor holding tank along the fiber precursor drawing direction, the fiber precursor is arranged in the cellulose holding tank, and under the action of the drawing rollers at both ends of the washing tank body, the fiber precursor passes through the sprayer on the fixed plate in sequence; the branch pipelines connected to the cold fluid outlet and the cold fluid inlet of the main heat exchanger and the auxiliary heat exchanger are provided with control valves and circulating pumps; the hot fluid inlets of the main heat exchanger and the auxiliary heat exchanger are connected to the heat source.

[0007] As a preferred embodiment of the utility model, two sub-tanks are arranged in each of the water washing tank bodies, and the bottoms of the two sub-tanks are respectively provided with a first sub-liquid inlet and a second sub-liquid inlet near the two sides of the sub-tanks, the sub-liquid inlets on the same side are connected by a first branch liquid inlet pipeline, the two opposite first branch liquid inlet pipelines are connected by a second branch liquid inlet pipeline, the second branch liquid inlet pipeline is connected to the main liquid inlet pipeline, and the main liquid inlet pipeline is connected to the total liquid inlet pipeline.

[0008] As a preferred embodiment of the utility model, the fixed plate and the sub-trough body are sealed by bolts and sealing rings, and at least two rows of sprayers are arranged on the fixed plate in sequence along the fiber filament drawing direction, and the sprayers in each row are arranged at equal intervals.

[0009] As a preferred embodiment of the utility model, a first liquid outlet and a second liquid outlet are respectively arranged on both sides of the center line of the water washing tank body at the lower end of the inner bottom surface of the water washing tank body, the first liquid outlet and the second liquid outlet are respectively connected to a first branch liquid outlet pipeline and a second branch liquid outlet pipeline, the first branch liquid outlet pipeline and the second branch liquid outlet pipeline are connected to the main liquid outlet pipeline, and are connected to the total liquid outlet pipeline through the main liquid outlet pipeline.

[0010] As a preferred embodiment of the present invention, the filter cover plate assembly includes a filter plate for covering the first liquid outlet and the second liquid outlet. Type filter cover plate, used to Type filter cover plate cover Type filter cover plate; wherein the The filter cover plate is provided with a through hole on the side where the washing liquid flows in. The filter cover plate is provided with a plurality of through holes near both ends and in the middle.

[0011] The utility model has the following advantages and positive effects:

[0012] (1) The water washing system provided by the utility model centrally supplies hot water to multiple water washing tanks, and is provided with two devices, a main heat exchanger and an auxiliary heat exchanger. The main heat exchanger and the auxiliary heat exchanger can be switched for use according to actual conditions. This method can ensure the uninterrupted operation of the water washing system, avoiding the problem of needing to shut down due to damage of the heat exchanger at the bottom of any water washing tank in the previous water washing system. The use of the water washing system can greatly improve the production efficiency of fiber raw yarn.

[0013] (2) The water washing system provided by the utility model can realize spray water washing, which can effectively remove chemical residues and impurities in the fiber raw silk, and has a good water washing effect.

[0014] (3) The water washing system provided by the utility model is provided with a filter cover plate assembly at the liquid outlet. The setting of the filter cover plate assembly can not only realize secondary filtration, but also make the washing liquid sprayed by the sprayer evenly filtered and discharged from the liquid outlet, avoiding dead corners. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of a water washing tank in a new water washing system for producing fiber precursors of the utility model;

[0017] Figure 2 yes Figure 1 Partial magnification Figure 1 ;

[0018] Figure 3 yes Figure 1 Partial magnification Figure 2 ;

[0019] Figure 4 yes Figure 1 A top view of

[0020] Figure 5 yes Figure 4 A partial enlarged view of

[0021] Figure 6 yes Figure 1 Side view of

[0022] Figure 7 yes Schematic diagram of the structure of the filter cover plate;

[0023] Figure 8 yes Schematic diagram of the structure of the filter cover plate;

[0024] Fig. 9 It is a schematic diagram of the connection between the water washing tank body and the main heat exchanger and the auxiliary heat exchanger;

[0025] Reference numerals: washing tank 1, main heat exchanger 2, auxiliary heat exchanger 3, sub-tank 11, control valve 12, circulation pump 13, heat source 14, fixing plate 15, sprayer 16, total liquid inlet pipeline 17, total liquid outlet pipeline 18, first branch liquid inlet pipeline 19, second branch liquid inlet pipeline 20, main liquid inlet pipeline 21, branch pipeline 22, first branch liquid outlet pipeline 23, second branch liquid outlet pipeline 24, main liquid outlet pipeline 25, Type filter cover plate 26, The filter cover plate 27, the first liquid outlet 101, the second liquid outlet 102, the first sub-liquid inlet 111, the second sub-liquid inlet 112, the liquid spray hole 151, and the fiber filament receiving groove 161. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set" 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, a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] like Figures 1 to 9 As shown, the utility model provides a novel water washing system for fiber precursor production, comprising a plurality of water washing tanks 1, a main heat exchanger 2, and an auxiliary heat exchanger 3 arranged in sequence along the drawing direction of the fiber precursor; wherein a plurality of sub-tanks 11 are arranged at intervals in the water washing tank 1, and the sub-liquid inlets at the bottom of the sub-tanks 11 are connected to the main liquid inlet pipeline through the sub-liquid inlet pipeline, and the main liquid inlet pipeline is connected to the main liquid inlet pipeline 17;

[0029] A fixing plate 15 is installed on the top of the sub-tank 11, and a plurality of sprayers 16 are arranged at intervals on the fixing plate 15. A spray hole 151 is arranged on the fixing plate 15 at a position opposite to the nozzle of the sprayer 16. The washing liquid in the sub-tank 11 passes through the spray hole 151 and is sprayed out from the nozzle of the sprayer 16.

[0030] The inner bottom surface of the water washing tank body 1 is an inclined surface, and a liquid outlet is arranged at the lower end of the inner bottom surface of the water washing tank body, and a filter cover plate assembly for covering the liquid outlet is arranged near the liquid outlet; the liquid outlets 101 of the plurality of water washing tank bodies 1 are connected to the total liquid outlet pipeline 18 through a branch liquid outlet pipeline, a main liquid outlet pipeline, and the end of the total liquid outlet pipeline 18 is respectively connected to the cold fluid inlet of the main heat exchanger 2 and the auxiliary heat exchanger 3 through a tee and two branch pipelines 22; the total liquid inlet pipeline 17 and the total liquid outlet pipeline 18 are both arranged at the bottom of the water washing tank body 1, and the liquid inlet of the total liquid inlet pipeline 17 is respectively connected to the cold fluid outlet of the main heat exchanger 2 and the auxiliary heat exchanger 3 through a tee and two branch pipelines 22;

[0031] The end of the sprayer 16 that contacts the fiber precursor is provided with a fiber precursor receiving groove 161 along the fiber precursor drawing direction. The fiber precursor is arranged in the cellulose receiving groove 161. Under the action of the drawing rollers at both ends of the washing tank body 1, the fiber precursor passes through the sprayer 16 on the fixed plate 15 in sequence.

[0032] A control valve 12 and a circulating pump 13 are provided on the branch pipeline 22 connected to the cold fluid outlet and the cold fluid inlet of the main heat exchanger 2 and the auxiliary heat exchanger 3; the hot fluid inlet of the main heat exchanger 2 and the auxiliary heat exchanger 3 is connected to the heat source 14, and the heat source 14 can be high-pressure steam. The hot fluid discharged from the hot fluid outlet of the heat exchanger can be circulated into the heat exchanger after heating.

[0033] Further, if Figure 1 , Figure 4 , Fig. 9 As shown, in this embodiment, two sub-tanks 11 are arranged in each of the water washing tank bodies 1, and the bottoms of the two sub-tanks 11 are respectively provided with a first sub-liquid inlet 111 and a second sub-liquid inlet 112 near the two sides of the sub-tanks. The sub-liquid inlets on the same side are connected by a first branch liquid inlet pipeline 19, and the two opposite first branch liquid inlet pipelines 19 are connected by a second branch liquid inlet pipeline 20, the second branch liquid inlet pipeline 20 is connected to the main liquid inlet pipeline 21, and the main liquid inlet pipeline 21 is connected to the total liquid inlet pipeline 17.

[0034] Further, if Figure 2 , Figure 4 As shown, in this embodiment, the fixing plate 15 and the sub-tank body 11 are sealed by bolts and sealing rings, and at least two rows of sprayers 16 are arranged on the fixing plate 15 in sequence along the fiber filament drawing direction, and the sprayers 16 in each row are arranged at equal intervals.

[0035] Further, if Figure 1 , Figure 4 , Figure 6 , Fig. 9 As shown, in this embodiment, a first liquid outlet 101 and a second liquid outlet 102 are respectively arranged on both sides of the center line of the water washing tank body at the lower end of the inner bottom surface of the water washing tank body 1, and the first liquid outlet 101 and the second liquid outlet 102 are respectively connected to a first branch liquid outlet pipeline 23 and a second branch liquid outlet pipeline 24, and the first branch liquid outlet pipeline 23 and the second branch liquid outlet pipeline 24 are connected to a main liquid outlet pipeline 25, and are connected to a total liquid outlet pipeline 18 through the main liquid outlet pipeline 25.

[0036] Further, if Figure 3 , Figure 7 , Figure 8 As shown, in this embodiment, the filter cover plate assembly includes a filter plate for covering the first liquid outlet 101 and the second liquid outlet 102. Type filter cover plate 26, used to Type filter cover plate cover Type filter cover plate 27; wherein the The filter housing plate 26 is provided with a through hole (not marked) on the side where the washing liquid flows in. The filter cover plate 27 is provided with a plurality of through holes (not marked) near both ends and the middle. The filter cover plate assembly is used to filter the thread heads, hair threads, etc., and at the same time, the washing liquid sprayed by the sprayer 16 can be evenly filtered and discharged through the liquid outlet to avoid dead corners.

[0037] It should be noted that in this embodiment, Type filter cover plate 26, The filter cover plate 27 can be fixed to the washing tank body 1 by welding or bolting. This application does not impose any limitation on the installation method of the filter cover plate.

[0038] In this embodiment, the auxiliary heat exchanger 3 is a backup heat exchanger. Under normal circumstances, the control valve 12 and the circulating pump 13 on the branch pipe 22 connected to the auxiliary heat exchanger 3 are in a closed state. When the main heat exchanger 2 fails and needs maintenance, the control valve 12 and the circulating pump 13 on the branch pipe 22 connected to the main heat exchanger 2 are closed, and the control valve 12 and the circulating pump 13 on the branch pipe 22 connected to the auxiliary heat exchanger 3 are opened, and the auxiliary heat exchanger 3 starts to work. This method can ensure the uninterrupted operation of the water washing system and ensure the production efficiency of the fiber raw yarn.

[0039] The above description is only a specific implementation case of the utility model, but the technical features of the utility model are not limited thereto. Any changes and modifications made by any technician in the field within the field of the utility model are within the scope of the patent of the utility model.

Claims

1. A novel water washing system for fiber precursor production, characterized in that: The invention comprises a plurality of water washing tank bodies, a main heat exchanger and an auxiliary heat exchanger which are sequentially arranged along the drawing direction of the fiber precursor; wherein, a plurality of sub-tanks are arranged at intervals in the water washing tank body, and the sub-liquid inlet at the bottom of the sub-tank body is connected with the main liquid inlet pipeline through the branch liquid inlet pipeline and the main liquid inlet pipeline, and a fixing plate is installed on the top of the sub-tank body, and a plurality of sprayers are arranged at intervals on the fixing plate, and a spray hole is arranged on the fixing plate at a position opposite to the nozzle of the sprayer, and the washing liquid in the sub-tank body is sprayed from the nozzle of the sprayer after passing through the spray hole; the inner bottom surface of the water washing tank body is an inclined surface, and the washing liquid in the sub-tank body is sprayed from the nozzle of the sprayer after passing through the spray hole; the inner bottom surface of the water washing tank body is an inclined surface, and the washing liquid in the sub-tank body is sprayed from the nozzle of the sprayer; the washing liquid in the sub-tank body is a spray hole ... A liquid outlet is arranged at one end of the lower inner bottom surface, and a filter cover plate assembly for covering the liquid outlet cover is arranged near the liquid outlet; the liquid outlets of the plurality of water washing tank bodies are connected through a branch liquid outlet pipeline, a main liquid outlet pipeline and a total liquid outlet pipeline, and the end of the total liquid outlet pipeline is respectively connected to the cold fluid inlet of the main heat exchanger and the auxiliary heat exchanger through a tee and two branch pipelines; the total liquid inlet pipeline and the total liquid outlet pipeline are both arranged at the bottom of the water washing tank body, and the liquid inlet of the total liquid inlet pipeline is respectively connected to the cold fluid outlet of the main heat exchanger and the auxiliary heat exchanger through a tee and two branch pipelines; The end of the sprayer in contact with the fiber precursor is provided with a fiber precursor holding tank along the fiber precursor drawing direction, the fiber precursor is arranged in the cellulose holding tank, and under the action of the drawing rollers at both ends of the washing tank body, the fiber precursor passes through the sprayer on the fixed plate in sequence; the branch pipelines connected to the cold fluid outlet and the cold fluid inlet of the main heat exchanger and the auxiliary heat exchanger are provided with control valves and circulating pumps; the hot fluid inlets of the main heat exchanger and the auxiliary heat exchanger are connected to the heat source.

2. A novel water washing system for fiber precursor production according to claim 1, characterized in that: Two sub-tanks are arranged in each of the water washing tank bodies, and the bottoms of the two sub-tanks are respectively provided with a first sub-liquid inlet and a second sub-liquid inlet near the two sides of the sub-tanks. The sub-liquid inlets on the same side are connected by a first branch liquid inlet pipeline, and the two opposite first branch liquid inlet pipelines are connected by a second branch liquid inlet pipeline, the second branch liquid inlet pipeline is connected to the main liquid inlet pipeline, and the main liquid inlet pipeline is connected to the main liquid inlet pipeline.

3. A novel water washing system for fiber precursor production according to claim 1, characterized in that: The fixing plate and the sub-tank body are sealed and connected by bolts and sealing rings. At least two rows of sprayers are sequentially arranged on the fixing plate along the fiber filament drafting direction, and the sprayers in each row are arranged at equal intervals.

4. A novel water washing system for fiber precursor production according to claim 1, characterized in that: The lower end of the inner bottom surface of the water washing tank body is provided with a first liquid outlet and a second liquid outlet on both sides of the center line of the water washing tank body, respectively; the first liquid outlet and the second liquid outlet are connected to a first branch liquid outlet pipeline and a second branch liquid outlet pipeline, respectively; the first branch liquid outlet pipeline and the second branch liquid outlet pipeline are connected to a main liquid outlet pipeline, and are connected to a total liquid outlet pipeline through the main liquid outlet pipeline.

5. A novel water washing system for fiber precursor production according to claim 4, characterized in that: The filter cover plate assembly includes a filter plate for connecting the first liquid outlet and the second liquid outlet cover. Type filter cover plate, used to Type filter cover plate cover Type filter cover plate; wherein the The filter cover plate is provided with a through hole on the side where the washing liquid flows in. The filter cover plate is provided with a plurality of through holes near both ends and in the middle.

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