Light alkali recovery system for alkali cleaning production

Abstract

The utility model discloses a light alkali recovery system used in alkali cleaning production, which comprises a light alkali filtering storage tank, a light alkali precipitation tank and a pollution discharge tank, a filtrate outlet of the light alkali filtering storage tank is communicated with the light alkali precipitation tank, and a filter residue outlet of the light alkali filtering storage tank is communicated with the pollution discharge tank; a precipitate outlet of the light alkali precipitation tank is communicated with the pollution discharge pool; and a supernatant outlet of the blowdown pool is communicated with the light alkali precipitation tank. In order to solve the technical problems and realize the corresponding technical effects, primary filtration of light alkali is realized through the light alkali filtration storage tank, most impurities in the light alkali liquor are filtered out, then the light alkali liquor obtained through primary filtration is subjected to precipitation layering in the light alkali precipitation tank, the impurities and the light alkali liquor are further separated, and the light alkali liquor is recycled. And finally, the supernate in the pollution discharge pool is introduced into the light alkali precipitation tank again for precipitation, so that the light alkali recovery effect can be fully realized, and the light alkali recovery efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dilute alkali recovery, in particular to a dilute alkali recovery system used in clean alkali production. Background Art

[0002] During the printing and dyeing process of cotton fabrics, alkali solution is often used to improve their gloss and feel. The cotton fabric surface is immersed in alkali solution to cause swelling, and the fiber orientation is increased under the action of tension to improve strength, making the cotton fiber into a very smooth cylinder, increasing the diffuse reflection of light, showing a silky gloss, reducing the fabric shrinkage rate, and eliminating wrinkles on the fabric surface. After the alkali treatment of cotton fabrics, the weak alkali solution contains a large amount of impurities. If discharged directly, it will lead to serious waste of alkali water. Therefore, production personnel filter out impurities by filtering to obtain relatively clean weak alkali solution, so as to achieve the recycling of alkali solution. However, the current weak alkali solution recovery device is not thorough enough to recycle the alkali solution, which still causes a certain degree of alkali solution waste. Utility Model Content

[0003] The utility model aims to provide a dilute alkali recovery system for alkali cleaning production, which solves the problem that the alkali recovery device does not recover the alkali thoroughly enough, thereby improving the recovery effect and efficiency of the dilute alkali.

[0004] The utility model is achieved through the following technical solutions:

[0005] A light alkali recovery system for use in clean alkali production comprises a light alkali filter storage tank, a light alkali sedimentation tank and a sewage tank, wherein the filtrate outlet of the light alkali filter storage tank is connected to the light alkali sedimentation tank, the filter residue outlet of the light alkali filter storage tank is connected to the sewage tank; the sedimentation outlet of the light alkali sedimentation tank is connected to the sewage tank; and the supernatant outlet of the sewage tank is connected to the light alkali sedimentation tank. In order to solve the above technical problems and achieve corresponding technical effects, the utility model realizes the initial filtration of light alkali through the light alkali filter storage tank to filter out most of the impurities in the light alkali liquid, and then the light alkali liquid obtained by the initial filtration is precipitated and stratified in the light alkali sedimentation tank to further separate the impurities and the light alkali liquid, and finally the supernatant in the sewage tank is passed into the light alkali sedimentation tank again for precipitation, thereby being able to fully achieve the light alkali recovery effect and thereby improve the light alkali recovery efficiency.

[0006] Further technical solutions:

[0007] The dilute alkali filter storage tank is placed horizontally, and a filter assembly is provided in the dilute alkali filter storage tank, which separates the dilute alkali filter storage tank into a left tank body and a right tank body. The left tank body is connected to the external dilute alkali liquid, and the right tank body is connected to the dilute alkali precipitation tank.

[0008] Furthermore: the filter residue outlet is arranged on the tank wall of the dilute alkali filter storage tank below the filter assembly, and the filter residue outlet is connected to the sewage tank through a residue pipe.

[0009] Furthermore: one end of the slag pipe is connected to the filter residue outlet, and the other end of the slag pipe extends to the bottom of the sewage tank.

[0010] Furthermore: the tank wall of the dilute alkali filter storage tank below the filter assembly is a cone-shaped structure, and the filter residue outlet is arranged at the bottom of the cone-shaped structure.

[0011] Furthermore: the bottom of the dilute alkali precipitation tank is a cone-shaped structure, and the precipitation outlet is arranged at the bottom of the cone-shaped structure;

[0012] Furthermore: the sedimentation outlet is connected to the sewage tank through a sedimentation pipe, and the bottom end of the sedimentation pipe extends to the bottom of the sewage tank.

[0013] Furthermore: a liquid level pump assembly is placed in the sewage tank, the liquid inlet of the liquid level pump assembly floats on the surface of the supernatant in the sewage tank, and the liquid outlet of the liquid level pump assembly is connected to the supernatant outlet.

[0014] Furthermore: the liquid surface pump assembly includes a floating member and a liquid pump, and the floating member floats on the surface of the supernatant in the sewage tank;

[0015] Furthermore: the liquid pump is fixed to the floating member, and the liquid inlet of the liquid pump passes through the floating member and is connected to the supernatant in the sewage tank, and the liquid outlet of the liquid pump is connected to the supernatant outlet.

[0016] Furthermore: the connecting pipes between the dilute alkali filtration storage tank, the dilute alkali precipitation tank and the sewage tank are all provided with a one-way valve for controlling the on-off of the pipeline.

[0017] Further: the supernatant formed by precipitation in the dilute alkali precipitation tank is passed into the subsequent dilute alkali concentration equipment;

[0018] Furthermore: the bottom sludge formed by precipitation in the sewage tank is introduced into the subsequent sludge treatment equipment.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. The utility model relates to a dilute alkali recovery system for alkali cleaning production. The dilute alkali is initially filtered through a dilute alkali filter storage tank to remove most of the impurities in the dilute alkali liquid. The dilute alkali liquid obtained by the initial filtration is then precipitated and stratified in a dilute alkali precipitation tank to further separate the impurities and the dilute alkali liquid. Finally, the supernatant in the sewage tank is again passed into the dilute alkali precipitation tank for precipitation, thereby fully realizing the dilute alkali recovery effect and thereby improving the dilute alkali recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a structural diagram of the dilute alkali filtration and storage tank;

[0024] Figure 3 This is a structural diagram of a dilute alkali precipitation tank;

[0025] Figure 4 Schematic diagram of the sewage tank structure.

[0026] Markings and corresponding parts names in the accompanying drawings:

[0027] 1- light alkali filter storage tank, 2- light alkali sedimentation tank, 3- sewage tank, 11- filtrate outlet, 12- filter residue outlet, 13- filtration assembly, 15- left tank body, 16- right tank body, 17- slag pipeline, 21- sedimentation outlet, 22- sedimentation pipeline, 31- supernatant outlet, 32- liquid level pump assembly, 321- floating part, 322- liquid pump. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0029] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that these specific details are not necessarily required to practice the present invention. In other embodiments, well-known structures, circuits, materials, or methods are not described in detail to avoid obscuring the present invention.

[0030] Throughout this specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout this specification do not necessarily refer to the same embodiment or example. In addition, the particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or subcombination. Furthermore, it will be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes only and are not necessarily drawn to scale. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are 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 should not be understood as limiting the scope of protection of the present invention.

[0032] Example:

[0033] like Figures 1 to 4 As shown, the utility model is a caustic soda recovery system for caustic soda production, comprising a caustic soda filter storage tank 1, a caustic soda sedimentation tank 2 and a sewage tank 3, wherein the filtrate outlet 11 of the caustic soda filter storage tank 1 is connected to the caustic soda sedimentation tank 2, and the filter residue outlet 12 of the caustic soda filter storage tank 1 is connected to the sewage tank 3; the sedimentation outlet 21 of the caustic soda sedimentation tank 2 is connected to the sewage tank 3; and the supernatant outlet 31 of the sewage tank 3 is connected to the caustic soda sedimentation tank 2. In this embodiment, the caustic soda is initially filtered by the caustic soda filter storage tank 1 to remove most of the impurities in the caustic soda solution. The caustic soda solution obtained by the initial filtration is then precipitated and stratified in the caustic soda sedimentation tank 2 to further separate the impurities and the caustic soda solution. Finally, the supernatant in the sewage tank 3 is passed again into the caustic soda sedimentation tank 2 for secondary precipitation, thereby fully achieving the caustic soda recovery effect and thereby improving the caustic soda recovery efficiency.

[0034] In this embodiment, the alkali filter storage tank 1 is preferably positioned horizontally, and a filter assembly 13 is provided within the alkali filter storage tank 1. The filter assembly 13 separates the alkali filter storage tank 1 into a left tank body 15 and a right tank body 16. The left tank body 15 is connected to the external alkali solution, and the right tank body 16 is connected to the alkali precipitation tank 2. In this embodiment, the filter assembly 13 is used to perform the initial filtration of the alkali solution. Furthermore, to ensure that the residue filtered from the alkali filter storage tank 1 is effectively discharged into the sewage tank 3, the filter residue outlet 12 is provided on the tank wall of the alkali filter storage tank 1 below the filter assembly 13, and the filter residue outlet 12 is connected to the sewage tank 3 via a residue pipe 17. To prevent the residue from disturbing the supernatant liquid in the sewage tank 3 when entering the sewage tank 3, one end of the residue pipe 17 is connected to the filter residue outlet 12, and the other end of the residue pipe 17 extends to the bottom of the sewage tank 3. To further improve the efficiency of slag removal, the wall of the dilute alkali filter storage tank 1 below the filter assembly 13 is conical, with the filter residue outlet 12 located at the bottom of the conical structure. Similarly, the bottom of the dilute alkali precipitation tank 2 is conical, with the sedimentation outlet 21 located at the bottom of the conical structure. This sedimentation outlet 21 is connected to the drainage tank 3 via a sedimentation pipe 22, the bottom of which extends to the bottom of the drainage tank 3.

[0035] In order to ensure that the supernatant in the drainage tank 3 can be effectively passed into the dilute alkali precipitation tank 3 for secondary precipitation, thereby improving the recovery rate of the dilute alkali, in this embodiment, a liquid level pump assembly 32 is placed in the drainage tank 3. The liquid inlet of the liquid level pump assembly 32 floats on the surface of the supernatant in the drainage tank 3, and the liquid outlet of the liquid level pump assembly 32 is connected to the supernatant outlet 31. Specifically, the liquid level pump assembly 32 includes a floating member 321 and a liquid pump 322. The floating member 321 floats on the surface of the supernatant in the drainage tank 3; the liquid pump 322 is fixed to the floating member 321, and the liquid inlet of the liquid pump 322 passes through the floating member 321 and is connected to the supernatant in the drainage tank 3, and the liquid outlet of the liquid pump 322 is connected to the supernatant outlet 31.

[0036] The connecting pipes between the diluted alkali filtration and storage tank 1, the diluted alkali precipitation tank 2, and the sewage tank 3 are all provided with one-way valves for controlling the flow of the pipes. In this embodiment, the one-way valves not only achieve a one-way flow effect in the pipes to prevent liquid backflow from affecting the recovery of diluted alkali liquid, but also can control the flow of the pipes through the one-way valves.

[0037] The supernatant formed by precipitation in the dilute alkali precipitation tank 2 is passed into the subsequent dilute alkali concentration equipment; the bottom sludge formed by precipitation in the sewage tank 3 is passed into the subsequent sludge treatment equipment.

[0038] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A dilute alkali recovery system for caustic soda production, characterized in that: The invention comprises a light alkali filter storage tank (1), a light alkali precipitation tank (2) and a sewage tank (3), wherein the filtrate outlet (11) of the light alkali filter storage tank (1) is connected to the light alkali precipitation tank (2), and the filter residue outlet (12) of the light alkali filter storage tank (1) is connected to the sewage tank (3); The precipitation outlet (21) of the dilute alkali precipitation tank (2) is connected to the sewage tank (3); The supernatant liquid outlet (31) of the sewage discharge tank (3) is communicated with the dilute alkali precipitation tank (2).

2. A system for recovering diluted caustic soda in caustic soda production according to claim 1, characterized in that: The light alkali filter storage tank (1) is placed horizontally, and a filter assembly (13) is provided in the light alkali filter storage tank (1). The filter assembly (13) separates the light alkali filter storage tank (1) into a left tank body (15) and a right tank body (16). The left tank body (15) is connected to an external light alkali liquid, and the right tank body (16) is connected to the light alkali precipitation tank (2).

3. A system for recovering diluted caustic soda in caustic soda production according to claim 2, characterized in that: The filter residue outlet (12) is arranged on the tank wall of the dilute alkali filter storage tank (1) below the filter assembly (13), and the filter residue outlet (12) is connected to the sewage tank (3) through a residue pipe (17).

4. A system for recovering diluted caustic soda in caustic soda production according to claim 3, characterized in that: One end of the slag pipe (17) is connected to the filter residue outlet (12), and the other end of the slag pipe (17) extends to the bottom of the sewage tank (3).

5. A system for recovering diluted caustic soda in caustic soda production according to claim 2, characterized in that: The tank wall of the diluted alkali filter storage tank (1) below the filter assembly (13) is in a conical structure, and the filter residue outlet (12) is arranged at the bottom of the conical structure.

6. A system for recovering diluted caustic soda in caustic soda production according to claim 1, characterized in that: The bottom of the dilute alkali precipitation tank (2) is a cone-shaped structure, and the precipitation outlet (21) is arranged at the bottom of the cone-shaped structure; The sedimentation outlet (21) is connected to the sewage tank (3) through a sedimentation pipe (22), and the bottom end of the sedimentation pipe (22) extends to the bottom of the sewage tank (3).

7. The system for recovering diluted caustic soda used in caustic soda production according to claim 1, characterized in that: A liquid level pump assembly (32) is placed in the sewage tank (3), the liquid inlet of the liquid level pump assembly (32) floats on the surface of the supernatant in the sewage tank (3), and the liquid outlet of the liquid level pump assembly (32) is connected to the supernatant outlet (31).

8. A system for recovering diluted caustic soda used in caustic soda production according to claim 7, characterized in that: The liquid surface pump assembly (32) comprises a floating member (321) and a liquid pump (322), wherein the floating member (321) floats on the surface of the supernatant liquid in the sewage tank (3); The liquid pump (322) is fixed to the floating member (321), and the liquid inlet of the liquid pump (322) passes through the floating member (321) and is connected to the supernatant in the sewage tank (3), and the liquid outlet of the liquid pump (322) is connected to the supernatant outlet (31).

9. The system for recovering diluted caustic soda used in caustic soda production according to claim 1, characterized in that: The communicating pipes between the dilute alkali filtering and storage tank (1), the dilute alkali precipitation tank (2) and the sewage tank (3) are all provided with one-way valves for controlling the on-off of the pipes.

10. The system for recovering diluted caustic soda used in caustic soda production according to claim 1, characterized in that: The supernatant formed by precipitation in the dilute alkali precipitation tank (2) is passed into the subsequent dilute alkali concentration equipment; The bottom sludge formed by precipitation in the sewage tank (3) is introduced into the subsequent sludge treatment equipment.

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