Composite filtered water treatment system for wet spunlace

Abstract

The utility model discloses a composite filtering water treatment system for wet spunlace, which comprises an air flotation reaction system, a middle water tank, a sand filtering tank filtering system, a micro-nano filtering system and a clean water barrel for production, the air flotation reaction system, the middle water tank, the sand filter tank filtering system, the micro-nano filtering system and the clean water barrel for production are sequentially connected through pipelines; the air flotation reaction system is connected with a production water recovery pipeline, and the middle water tank is connected with a raw water pipeline. According to the composite filtered water treatment system for wet spunlace, the wastewater treatment efficiency is improved, zero discharge of wastewater is achieved, the environmental influence is reduced, water resources are saved, and the production cost is reduced. And meanwhile, the quality of non-woven fabric products is improved.

Description

Technical Field

[0001] This utility model belongs to the field of wet spunlace production technology, and more specifically, relates to a composite filtration water treatment system for wet spunlace. Background Technology

[0002] Water treatment systems are a crucial part of the production process of spunlace nonwoven materials, serving to purify and recycle wastewater generated during production. With the advancement of green production and increasing demands for reduced energy consumption and improved efficiency, the need for more environmentally friendly and efficient water treatment systems is becoming increasingly urgent.

[0003] Wet-spun nonwoven materials use pulp and short fibers as raw materials. The fibers in the pulp are short, and some of them will flow into the production wastewater system. The traditional production wastewater treatment system, which involves primary air flotation sedimentation, sand filtration and discharge, consumes a lot of water. Each ton of product requires 25 to 35 tons of production water. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to overcome the shortcomings of the prior art and provide a composite filtration water treatment system for wet hydroentanglement.

[0005] Technical Solution: The present invention discloses a composite filtration water treatment system for wet spunlace, comprising an air flotation reaction system, an intermediate water tank, a sand filter tank filtration system, a micro-nano filtration system, and a production clean water tank. The air flotation reaction system, the intermediate water tank, the sand filter tank filtration system, the micro-nano filtration system, and the production clean water tank are sequentially connected by pipelines. A production water recycling pipeline is connected to the air flotation reaction system, and a raw water pipeline is connected to the intermediate water tank.

[0006] In some embodiments, the flotation reaction system includes multiple interconnected flotation reaction tanks, each equipped with a dissolved air tank.

[0007] In some embodiments, the flotation reaction system is equipped with a water treatment flotation reagent addition device.

[0008] In some embodiments, the intermediate water tank is equipped with a water treatment disinfectant addition device.

[0009] In some embodiments, the intermediate water tank is connected to the sand filter system via a water supply pipeline, and an intermediate booster pump is installed in the water supply pipeline.

[0010] In some embodiments, an intermediate booster pump is provided between the sand filter tank filtration system and the micro / nano filtration system; a high-pressure water pump is provided at the output end of the production water tank.

[0011] In some embodiments, a backwashing pipe is also included, one end of which is connected to the intermediate water tank via a backwashing pump, and the other end of which is connected to the bottom of the sand filter tank filtration system. The top of the sand filter tank filtration system is connected to the air flotation reaction system via a sand filter tank backwash water recovery pipe.

[0012] In some embodiments, the micro / nano filtration system includes a multi-stage micro / nano filtration device.

[0013] In some embodiments, the production water recycling pipeline collects and transports wastewater generated during the production process to the treatment system for recycling and reprocessing.

[0014] Beneficial effects: Wet-process spunlace nonwoven materials use pulp and short fibers as raw materials. The fibers in the pulp are short, and some of them will flow into the production wastewater system. The traditional production wastewater treatment system, which involves primary air flotation sedimentation, sand filtration and discharge, consumes a lot of water. Each ton of product requires 25 to 35 tons of production water.

[0015] The wet spunlace composite filtration water treatment system of this invention produces production wastewater that, after primary air flotation sedimentation, sand filtration, advanced treatment, and sterilization, yields production water that meets both cleanliness and hygiene standards. This water can be returned to the slurry preparation unit or used directly in spunlace. The backwash water from the sand filter is collected, treated again by primary air flotation sedimentation, sand filtration, advanced treatment, and sterilization, and yields production water that meets both cleanliness and hygiene standards. This water can also be returned to the slurry preparation unit or used directly in spunlace. This forms a fully closed-loop cycle of production water, production water recycling, and sand filter tank backwash water recycling, reducing water consumption. The production water consumption per ton of product is reduced to 15-20 tons, saving 40% of water compared to traditional water treatment systems.

[0016] This invention relates to a composite filtration water treatment system for wet hydroentangling processes, which improves wastewater treatment efficiency, achieves zero wastewater discharge, reduces environmental impact, conserves water resources, and lowers production costs. Simultaneously, it improves the quality of nonwoven fabric products. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structural principle of a water treatment system according to an embodiment of the present invention. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., which indicate the orientation or positional relationship shown, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0022] Example 1

[0023] like Figure 1 As shown, a composite filtration water treatment system for wet hydroentanglement includes an air flotation reaction system 4, an intermediate water tank 9, a sand filter tank filtration system 14, a micro-nano filtration system 15, and a production clean water tank 16. The air flotation reaction system 4, the intermediate water tank 9, the sand filter tank filtration system 14, the micro-nano filtration system 15, and the production clean water tank 16 are connected in sequence by pipes. The air flotation reaction system is connected to a production water recycling pipe 1, and the intermediate water tank 9 is connected to a raw water pipe 11 (tap water).

[0024] In this embodiment, as Figure 1 As shown, the dissolved air flotation (DAF) reaction system 4 includes a primary DAF reaction tank 5 and a secondary DAF reaction tank 7 connected to each other. A primary dissolved air tank 6 and a secondary dissolved air tank 8 are respectively installed on the primary DAF reaction tank 5 and the secondary DAF reaction tank 7. The function of the DAF reaction system 4 is to separate suspended solids such as fibers, pulp, and impurities from the water using DAF technology. Specifically, the primary DAF reaction tank 5 is the initial stage of DAF, mainly responsible for the preliminary separation of suspended solids such as fibers, pulp, and impurities from the water. The secondary DAF reaction tank 7 further treats the suspended solids such as fibers, pulp, and impurities that were not completely separated in the primary DAF reaction tank 5, thereby improving water treatment efficiency.

[0025] Among them, such as Figure 1As shown, the flotation reaction system 4 is connected to a production water recovery pipe 1, a sand filter tank backwash water recovery pipe 2, and a water treatment flotation reagent addition device 3. The production water recovery pipe 1 collects wastewater generated during the production process and transports it to this treatment system for recycling. The sand filter tank backwash water recovery pipe 2 collects wastewater generated during the sand filter tank backwashing process for further treatment and recycling. The water treatment flotation reagent addition device 3 adds necessary reagents during the water treatment process to help remove suspended solids and impurities from the water.

[0026] In this embodiment, as Figure 1 As shown, the inlet of the intermediate water tank 9 is connected to the secondary air flotation reactor 7. A raw water pipe 11 (tap water) is connected to the intermediate water tank 9, and a water treatment disinfectant addition device 10 is also installed on the intermediate water tank 9. The intermediate water tank 9 is used to temporarily store water that has undergone preliminary air flotation treatment, preparing it for subsequent treatment. The function of the water treatment disinfectant addition device 10 is to add disinfectant to the water to ensure that the treated water quality meets hygiene standards. The raw water pipe 11 is a channel for replenishing tap water to the intermediate water tank 9 as needed.

[0027] In this embodiment, as Figure 1 As shown, the outlet of the intermediate water tank 9 is connected to the sand filter system 14, and the outlet of the intermediate water tank 9 and the sand filter system 14 are connected by a water supply pipe 13, which contains an intermediate booster pump 12. The intermediate booster pump 12 is used to pressurize the water in the intermediate water tank, ensuring that the water can smoothly pass through subsequent filtration units. The water supply pipe 13 is the channel for transporting the water, which has undergone preliminary air flotation treatment, to the sand filter system 14. The sand filter system 14 is an important device for further removing medium-sized fibers and pulp impurities from the water through the screening, collision, and adsorption of fine sand in the tank.

[0028] In this embodiment, as Figure 1 As shown, the outlet of the sand filter tank filtration system 14 is connected to the micro-nano filtration system 15, and an intermediate booster pump 12 is also provided between the outlet of the sand filter tank filtration system 14 and the micro-nano filtration system 15; wherein, the micro-nano filtration system 15 is composed of multi-stage micro-nano filtration devices, which further remove tiny particles and impurities in the water through micro-level filtration, ensuring the purity of the water quality.

[0029] In this embodiment, as Figure 1 As shown, the outlet of the micro / nano filtration system 15 is connected to a production water tank 16, and a high-pressure water pump 17 is connected to the outlet of the production water tank 16. The production water tank 16 stores fully treated water for use in the production process. The high-pressure water pump 17 is used to deliver the treated water to the hydroentanglement machine on the production line to meet production needs.

[0030] In this embodiment, as Figure 1 As shown, it also includes a backwash pipe 19, one end of which is connected to the intermediate water tank 9 via a backwash pump 18, and the other end of which is connected to the bottom of the sand filter tank filtration system 14. The top of the sand filter tank filtration system 14 is connected to the air flotation reaction system 4 via a sand filter tank backwash water recovery pipe 2.

[0031] The backwash pump 18 is used to increase the water pressure to 2-3 times the normal value to create a backwash water flow when the sand filter tank and filtration system need cleaning. The backwash water pipeline 19 is responsible for transporting the water supplied by the backwash pump to the sand filter tank system for cleaning and air washing.

[0032] The water used in wet hydroentangling production mainly includes water for pulping, water for wire washing, water for hydroentangling, water for washing the board, and backwash water for the sand filter tank. Water for pulping is used to prepare the pulp and fiber into a uniformly distributed slurry, accounting for 95% to 98% of the slurry. During slurry washing, white water from the white water tank is added, at which point the water volume accounts for 995‰ to 998‰ of the slurry mass. After the slurry washing pump is turned on, the inclined wire forming device operates at the designed speed, and the wet paper sheet is formed on the inclined wire and carried into the hydroentangling reinforcement zone. Most of the water used for preparing the slurry circulates directly in the slurry preparation and washing system; only a small portion of the water is carried into the hydroentangling zone by the wet paper sheet.

[0033] The water used for rinsing the inclined screen can be directly taken from the tap water source. After being pressurized by the intermediate booster pump 12, it is sprayed out from the rinsing nozzle located above the empty section of the inclined screen. A water receiving tank is directly installed at the lower end to collect the rinsing water and directly flow into the production water recycling pipeline 1.

[0034] The water used in spunlace is for fiber reinforcement. Because it needs to pass through the micropores of the water needle plate under high pressure, it needs to be kept in high purity. If recycled water is used, it needs to pass through the air flotation reaction system 4, the sand filter tank filtration system 14, and the micro-nano filtration system 15, and then be sterilized by adding bactericide through the water treatment bactericide addition device 10. When using raw water that is newly added to the intermediate water tank, it also needs to pass through the sand filter tank filtration system 14 and the micro-nano filtration system 15, and then be sterilized by adding bactericide through the water treatment bactericide addition device 10.

[0035] The water used for washing the plates is the water used to rinse the needle plates at regular intervals. It can be tap water directly taken from the raw water source and sprayed directly from the booster nozzle. A collection tank is set under the washing platform. The collected washing water is directly connected to the backwash water recovery pipe 2 of the sand filter tank. After passing through the air flotation reaction system 4, the sand filter tank filtration system 14, and the micro-nano filtration system 15, and after being sterilized by adding bactericide through the water treatment bactericide addition device 10, it is reused.

[0036] The backwash water for the sand filter tank is used to backwash the sand filter tank periodically. When the filtration system is working, the control valve of the backwash water pipeline 19 is closed, and the control valve of the water supply pipeline 13 is open. The water to be filtered passes through the air flotation reaction system 4, the intermediate water tank 9, the intermediate booster pump 12, and the water supply pipeline 13, and enters the sand filter tank filtration system 14 at a pressure close to or lower than that of the tap water supply system, i.e., 0.2~0.3MPa. Then, it passes through the micro-nano filtration system 15 and is collected in the production clean water tank 16, and is pumped to the hydroentanglement zone by the high-pressure water pump 17.

[0037] When the sand filter tank filtration system 14 reaches its working limit, it needs to be backwashed. At this time, the control valve of the water supply pipeline 13 is closed, and the control valve of the backwash water pipeline 19 is opened. The water in the intermediate water tank 9 enters the sand filter tank filtration system 14 from the bottom through the backwash pump 18 and the backwash water pipeline 19 at a pressure 2 to 3 times higher than that of the tap water supply system for backwashing. The effluent is injected into the composite filtration water treatment system for wet hydroentanglement of this utility model through the sand filter tank backwash water recovery pipeline 2.

[0038] Wet-spun nonwoven materials use pulp and short fibers as raw materials. The fibers in the pulp are short, and some of them will flow into the production wastewater system. The traditional production wastewater treatment system, which involves primary air flotation sedimentation, sand filtration and discharge, consumes a lot of water. Each ton of product requires 25 to 35 tons of production water.

[0039] This invention employs a self-designed wet spunlace composite filtration water treatment system. After primary air flotation sedimentation, sand filtration, advanced treatment, and sterilization, the production wastewater is treated to obtain production water that meets both cleanliness and hygiene standards. This water can be returned to the slurry preparation unit or used directly for spunlace. The sand filter backwash water is collected, treated to primary air flotation sedimentation, sand filtration, advanced treatment, and sterilization, and is also treated to obtain production water that meets both cleanliness and hygiene standards. This water can be returned to the slurry preparation unit or used directly for spunlace. This forms a fully closed-loop system for production water, production water recycling, and sand filter tank backwash water recycling, reducing water consumption. The production water consumption per ton of product is reduced to 15-20 tons, saving 40% of water compared to traditional water treatment systems.

[0040] This invention relates to a composite filtration water treatment system for wet hydroentangling processes, which improves wastewater treatment efficiency, achieves zero wastewater discharge, reduces environmental impact, conserves water resources, and lowers production costs. Simultaneously, it improves the quality of nonwoven fabric products.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A composite filtration water treatment system for wet hydroentanglement, characterized in that: The system includes an air flotation reaction system, an intermediate water tank, a sand filter tank filtration system, a micro-nano filtration system, and a production clean water tank. The air flotation reaction system, the intermediate water tank, the sand filter tank filtration system, the micro-nano filtration system, and the production clean water tank are connected in sequence by pipes. The air flotation reaction system is connected to a production water recycling pipe, and the intermediate water tank is connected to a raw water pipe.

2. The composite filtration water treatment system for wet hydroentanglement according to claim 1, characterized in that: The air flotation reaction system includes multiple interconnected air flotation reaction tanks, and dissolved air tanks are installed on the air flotation reaction tanks.

3. The composite filtration water treatment system for wet hydroentanglement according to claim 1, characterized in that: The air flotation reaction system is equipped with a water treatment air flotation reagent addition device.

4. A composite filtration water treatment system for wet hydroentanglement according to claim 1, characterized in that: The intermediate water tank is equipped with a water treatment disinfectant addition device.

5. A composite filtration water treatment system for wet hydroentanglement according to claim 1, characterized in that: The intermediate water tank and the sand filter system are connected by a water supply pipeline, and an intermediate booster pump is installed in the water supply pipeline.

6. A composite filtration water treatment system for wet hydroentanglement according to claim 1, characterized in that: An intermediate booster pump is provided between the sand filter tank filtration system and the micro-nano filtration system; a high-pressure water pump is provided at the output end of the production water tank.

7. A composite filtration water treatment system for wet hydroentanglement according to claim 1, characterized in that: It also includes a backwashing pipe, one end of which is connected to the intermediate water tank via a backwashing pump, and the other end of which is connected to the bottom of the sand filter tank filtration system. The top of the sand filter tank filtration system is connected to the air flotation reaction system via a sand filter tank backwash water recovery pipe.

8. A composite filtration water treatment system for wet hydroentanglement according to claim 1, characterized in that: The micro-nano filtration system includes multi-stage micro-nano filtration devices.

9. A composite filtration water treatment system for wet hydroentanglement according to claim 1, characterized in that: The production water recycling pipeline collects and transports the wastewater generated during the production process to the treatment system for recycling and reprocessing.

Images