Water-saving recycling device for printing and dyeing modification dyeing

Abstract

The utility model relates to the technical field of cotton fiber modification dyeing, in particular to a water-saving recycling device for printing and dyeing modification dyeing, which comprises a modification dyeing reactor, and a feed port of the modification dyeing reactor is respectively communicated with a discharge port of an alkali liquor supply device, a discharge port of a modifier supply device and a discharge port of a dye dissolving device. A water outlet of the modified dyeing reactor is communicated with an inlet of the filtering device, and an outlet of the filtering device is communicated with a water inlet of the recycled water storage device; a porous filter tube is arranged in the modified dyeing reactor; and an inlet of the porous filter tube is communicated with a water outlet of the recycled water storage device through a water return port of the modified dyeing reactor. According to the utility model, the sewage generated in the cation modification dyeing process is separated and recycled by utilizing the filtering device and the recycled water storage device, so that the utilization rate of water in the dyeing process after cation modification is improved, the discharge amount of the sewage is reduced, or no sewage is generated.

Description

Technical Field

[0001] The utility model relates to the technical field of cotton fiber modification and dyeing, in particular to a water-saving and recycling device for printing and dyeing modification. Background Art

[0002] Natural fiber fabrics refer to fabrics made from natural fibers such as plant fibers, animal fibers, and mineral fibers. Natural fiber fabrics can be divided into four major categories based on their raw material source: cotton, wool, linen, and silk. Cellulose fiber fabrics, represented by cotton, are characterized by good absorbency, soft texture, and low static charge, making them widely used as basic fabrics for clothing, furniture, medical and sanitary products, and industrial products. With the gradual improvement of living standards, people's demand for cellulose fiber fabrics is shifting towards high quality and personalized cellulose fiber fabrics. Reactive dyes are important dyes for dyeing cellulose fibers, but since most reactive dyes lack sufficient affinity for cellulose fibers and electrostatic repulsion exists between cellulose fibers and dyes, dye uptake is limited. This leads to problems such as low reactive dye utilization, heavy washing loads, and high chromaticity and salinity of wastewater, resulting in adverse environmental impacts. Prior art typically uses modifiers to modify cellulose fibers to increase their reactivity and enhance the affinity between the cellulose fiber surface and the reactive dye. Common modifiers include cationic modifiers, anionic modifiers and chitosan modifiers. Adding cationic modifiers to cellulose fibers can reduce or eliminate the negative charge effect on the surface of cellulose fibers, improve the ability of cellulose fiber surfaces to adsorb anionic reactive dyes, increase dyeing depth, and shorten dyeing time. Generally, cationic modifiers need to be activated with alkali before they can be used for printing and dyeing modification of cotton fabrics. During the printing and dyeing modification process, the cationic modifier and alkali are separately prepared into aqueous solutions of a certain concentration, which can accelerate the penetration of the cationic modifier into the cellulose fibers and improve the printing and dyeing modification effect of the cotton fabrics. However, the introduction of cationic modifiers and alkalis undoubtedly increases the water consumption in the printing and dyeing process, which not only causes a waste of water resources to a certain extent, but also poses a threat to the ecological environment. Utility Model Content

[0003] In response to the technical problem in the prior art that the actual utilization rate of dyeing water is low during the modification and dyeing of cellulose fibers using cationic modifiers, the utility model provides a water-saving and reuse device for printing and dyeing modification, which uses a filtering device and a recycled water storage device to separate and reuse the dyeing water generated in the cationic modification dyeing process, thereby improving the utilization rate of the dyeing water in the cationic modification dyeing process and reducing the discharge of sewage.

[0004] The technical solution of this utility model is as follows:

[0005] A printing and dyeing modified dyeing water-saving and reuse device comprises a modified dyeing reactor, wherein the feed port of the modified dyeing reactor is respectively connected to the discharge port of an alkali solution supply device, the discharge port of a modifier supply device and the discharge port of a dye material device, the drain port of the modified dyeing reactor is connected to the inlet of a filtering device, and the outlet of the filtering device is connected to the water inlet of a recycled water storage device; the modified dyeing reactor is also provided with a water inlet, which is connected to a water supply device.

[0006] A porous filter tube is installed inside the modified dyeing reactor. The inlet of the porous filter tube is connected to the outlet of the recycled water storage device through the return water port of the modified dyeing reactor. The recycled water discharged from the recycled water storage device is filtered through the porous filter tube and then enters the modified dyeing reaction chamber for reuse.

[0007] Furthermore, the modification and dyeing reactor includes an openable top cover and a tank body. The top cover is positioned above the tank body and fits snugly with the tank body. When the top cover is installed above the tank body, the top cover and the tank body together form a sealed modification and dyeing reaction chamber. When the top cover is opened from above the tank body, cellulose fibers to be modified and dyed can be added to the tank body.

[0008] Furthermore, the feed inlet of the modified dyeing reactor includes a dye feed inlet and a modifier feed inlet, and the dye feed inlet and the modifier feed inlet are respectively arranged on the side of the tank body.

[0009] Furthermore, the dye feed port of the modified dyeing reactor is connected to the discharge port of the dye material device, and the modifier feed port of the modified dyeing reactor is connected to the discharge ports of the alkali solution supply device and the modifier supply device respectively via a first diverter pipe, and the first diverter pipe is provided with a first water diversion valve. A flow monitoring device and a flow regulating device are independently provided between the alkali solution supply device and the first water diversion valve, and between the modifier supply device and the first water diversion valve, respectively. The flow monitoring device is preferably an electronic flow meter.

[0010] Furthermore, there are at least two recycled water storage devices. Different recycled water storage devices can be used to store residual dyed water of different colors. During the next cycle of modified dyeing, recycled water from the recycled water storage device of the corresponding color can be used as needed to replenish the water level in the modified dyeing reactor. A stirring device is provided within the recycled water storage device, preferably a paddle stirrer or a turbine stirrer. Independent regulating valves are provided between the water outlet of each recycled water storage device and the return water outlet of the modified dyeing reactor.

[0011] Furthermore, the outlet of the filtration device is connected to the inlet of the reused water storage device via a second diverter pipe, which is provided with a second water diverter valve. A flow monitoring device and a reused water regulating valve are provided between the filtration device and the reused water storage device. A flow monitoring device and a flow regulating device are provided between the filtration device and the reused water storage device, and between the reused water storage device and the modified dyeing reactor, respectively. The filtration device is used to separate solid impurities discharged from the modified dyeing reactor. The filtration device is also provided with a sewage outlet for discharging alkaline wastewater.

[0012] Furthermore, a liquid level monitoring device is provided inside the modified dyeing reactor, and the liquid level monitoring device is used to monitor the amount of liquid inside the modified dyeing reactor. The modified dyeing reactor is also provided with a temperature monitoring device and a temperature control device.

[0013] Furthermore, the alkali solution supply device and the modifier supply device are each provided with a temperature control device. A stirring device is provided inside the alkali solution supply device and the modifier supply device. The alkali solution supply device and the modifier supply device are each provided with a temperature monitoring device.

[0014] Further, the modification dyeing reactor, alkali solution supply device, modifier supply device, dye material device, filter, recycled water storage device and water supply device are all electrically connected with PLC controller.PLC controller can also be electrically connected with each regulating valve, each water diverter valve, each flow monitoring device, each flow regulating device, liquid level monitoring device, each temperature monitoring device and temperature control device.Each flow monitoring device is respectively used for monitoring flow in each pipeline.After completing cellulose fiber modification, dyeing is carried out, according to the requirement of the process of modification dyeing, the liquid amount of modification dyeing reactor can be regulated and controlled by PLC controller, and recycled water storage device, alkali solution supply device, modifier supply device and dye material device are respectively controlled to add recycled water, alkali solution, cationic modifier and dye to the inside of modification dyeing reactor, and control water supply device to add water of loss in modification dyeing reactor.

[0015] The beneficial effects of the present invention are:

[0016] The utility model provides a printing and dyeing modified dyeing water-saving and recycling device, which connects the drain outlet of the modified dyeing reactor with a filtering device, and utilizes the filtering device to separate fibers and solid impurities in the residual dyeing water discharged from the modified dyeing reactor to obtain recycled water; the filtering device is connected with a recycled water storage device, and the recycled water storage device is connected with the modified dyeing reactor, and the filtered recycled water is stored in the recycled water storage device, and the recycled water is transported to the modified dyeing reactor to participate in the dyeing reaction of the cation-modified cellulose fibers in the next cycle, thereby effectively improving the recycling rate of the residual dyeing water after cation modification, thereby reducing the amount of sewage discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic structural diagram of the printing and dyeing modified dyeing water-saving and recycling device in Example 1.

[0019] In the figure, 1-modified dyeing reactor, 2-first temperature monitor, 3-porous filter tube, 4-first liquid level gauge, 5-drain outlet, 6-modifier water supply pipeline, 7-modifier supply pipeline, 8-auxiliary agent supply pipeline, 9-second temperature monitor, 10-modifier supply tank, 11-first refrigeration pipe, 12-first turbine agitator, 13-alkali solution water supply pipeline, 14-alkali solution supply pipeline, 15-third temperature monitor, 16-alkali solution supply tank, 17-second refrigeration pipe, 18-second turbine agitator, 19-modifier flow control valve, 20-alkali solution Liquid flow regulating valve, 21-dye water supply pipe, 22-fourth temperature monitor, 23-steam inlet, 24-third turbine agitator, 25-dye material tank, 26-steam outlet, 27-second liquid level meter, 28-dye flow regulating valve, 29-PLC controller, 30-recycled water storage tank one, 31-first paddle agitator, 32-first flow meter, 33-recycled water storage tank two, 34-second paddle agitator, 35-second flow meter, 36-recycled water flow meter, 37-recycled water pump, 38-filtration device, 39-sewage pipe. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0021] Example 1

[0022] A printing and dyeing modified dyeing water saving and recycling device, such as Figure 1As shown, the modified dyeing reactor 1 includes an openable top cover and a tank body. The top cover and the tank body are adapted to each other and installed above the tank body. The top cover and the tank body together form a sealed modified dyeing reaction chamber. The bottom of the tank body is connected to a circulation pump. The modified dyeing reactor 1 is provided with a first temperature monitor 2 and a first liquid level gauge 4 inside. The modified dyeing reactor 1 is also equipped with a temperature control device. The modified dyeing reactor 1 is provided with a dye feed port, a modifier feed port and a water inlet. The water inlet is connected to a water supply device (not shown in the figure). The dye feed port and the modifier feed port are located on the side of the tank body. The modifier feed port is connected to a first diversion pipe. The first diversion pipe is provided with a first water diversion valve and is connected to a first branch pipe and a second branch pipe respectively through the first water diversion valve. The first branch pipe and the second branch pipe are respectively provided with an electronic flow meter. The first branch pipe is connected to an alkali solution supply tank 16, and an alkali solution flow regulating valve 20 is provided on the first branch pipe. The second branch pipe is connected to the modifier supply tank 10, and a modifier flow regulating valve 19 is provided on the second branch pipe. The top of the alkali solution supply tank 16 is provided with a There is a first water inlet and an alkali solution inlet, the first water inlet is connected to the alkali solution water supply pipe 13, the alkali solution inlet is connected to the alkali solution supply pipe 14, a third temperature monitor 15 is provided inside the alkali solution supply tank 16, a second turbine agitator 18 is provided at the bottom of the alkali solution supply tank 16, and a second refrigeration pipe 17 is provided on the outside of the alkali solution supply tank 16; a second water inlet, a modifier inlet and an auxiliary agent inlet are provided on the top of the modifier supply tank 10, the second water inlet is connected to the modifier water supply pipe 6, the modifier inlet is connected to the modifier supply pipe 7, the auxiliary agent inlet is connected to the auxiliary agent supply pipe 8, and a first refrigeration pipe 11 is provided on the outside of the modifier supply tank 10. The dye feed inlet of the modified dyeing reactor 1 is connected to the discharge outlet at the bottom of the dye chemical tank 25 via a pipeline. A third water inlet is provided at the top of the dye chemical tank 25, which is connected to the dye water supply pipe 21. A fourth temperature monitor 22 and a second liquid level gauge 27 are installed inside the dye chemical tank 25. A third turbine agitator 24 is installed at the bottom of the dye chemical tank 25. A steam inlet 23 is provided at the lower end of the side of the dye chemical tank 25, and a steam outlet 26 is provided at the upper end of the side of the dye chemical tank 25. A dye flow control valve 28 is installed on the pipeline between the dye chemical tank 25 and the modified dyeing reactor 1. A porous filter tube 3 is arranged inside the modified dyeing reactor 1. The porous filter tube 3 is a columnar structure with a closed top and filter holes on the side. The bottom inlet of the porous filter tube 3 is connected to the return water port at the bottom of the tank body of the modified dyeing reactor 1. The return water port is connected to the outlet of the reuse water storage tank 1 30 and the outlet of the reuse water storage tank 2 33 through a diversion pipe. A water pump is arranged on the main pipe of the diversion pipe. A first flow meter 32 and a second flow meter 35 are respectively arranged on the outside of the outlet of the reuse water storage tank 1 30 and the outside of the outlet of the reuse water storage tank 2 33.A drain outlet 5 is provided at the lower side of the modified dyeing reactor 1. This outlet 5 is connected to the inlet of the filter device 38 via a pipeline. The outlet of the filter device 38 is connected to the reused water storage tank 1 30 and the reused water storage tank 2 33 via a second diverter pipe. The main pipe of the second diverter pipe is equipped with a second water diversion valve (not shown), a reused water flow meter 36, and a reused water pump 37. A flow monitoring device and a reused water regulating valve are provided between the filter device and the reused water storage tank. An electronic flow meter and a flow regulating valve are provided on the pipeline between the filter device 38 and the reused water storage tank 1 30 and the pipeline between the filter device 38 and the reused water storage tank 2 33, respectively. The filter device 38 also has a sewage outlet, which is connected to a sewage pipe 39. A first paddle agitator 31 and a second paddle agitator 34 are provided inside the reused water storage tank 1 30 and the reused water storage tank 2 33, respectively.

[0023] The modified dyeing reactor 1, alkali solution supply tank 16, modifier supply tank 10, dye chemical tank 25, filter 38, recycled water storage tank 1 30, and recycled water storage tank 2 33 are all electrically connected to a PLC controller. The PLC controller is also electrically connected to the regulating valves, water diversion valves, flow monitoring devices, flow regulating devices, liquid level monitoring devices, temperature monitoring devices, and temperature control devices.

[0024] Instructions: First, open the top cover of the modified dyeing reactor and quantitatively add the cellulose fiber to be cationic-modified into the tank. Then close the top cover. Use the PLC controller to control the alkali solution supply tank, modifier supply tank, and water supply device to quantitatively add alkali solution, cationic modifier, and fresh water into the tank. Simultaneously, start the circulation pump located at the bottom of the tank to promote the mixing of alkali solution, cationic modifier, water, and fiber. The amount of modifier used is determined by the degree of fiber modification substitution corresponding to the desired color depth. The flow rates of alkali solution, cationic modifier, and fresh water can be monitored using a flow monitoring device. After the alkali solution, cationic modifier and fresh water are added and evenly mixed with the cellulose fibers, the temperature control device of the modified dyeing reactor is used to heat the mixture in the dyeing modification reaction chamber to a preset temperature and then carry out the modification reaction. After the modification reaction is completed, the temperature control device is used again to cool the mixture in the modified dyeing reaction chamber, and fresh water is injected into the modified dyeing reactor for washing using a water supply device. After washing, the alkaline wastewater in the modified dyeing chamber is filtered through a porous filter tube and then enters the filter device for filtration, and then discharged from the sewage outlet to the sewage pipe, and finally enters the sewage pool for treatment. After the alkaline wastewater in the modified dyeing chamber is discharged, the dyeing liquid containing the activated dye in the dye material tank is injected into the modified dyeing reactor for dyeing according to the required color. After the dyeing is completed, the mixed liquid in the modified dyeing reactor is transported to the filter for filtration to remove the fiber fabric suspended in the mixed liquid to obtain recycled water. The recycled water is pumped into the corresponding recycled water storage tank by the recycled water pump. During the pumping process, the flow rate of the recycled water entering the recycled water storage tank can be monitored and regulated by the flow monitoring device and the recycled water regulating valve. After the recycled water is stirred and mixed in the recycled water storage tank, the output of the recycled water storage device in the next cycle of cationic modified dyeing is determined according to the liquid demand in the modified dyeing reactor. The recycled water enters the modified dyeing reactor through the diversion pipe and the porous filter tube in turn to participate in the dyeing of the cationic modified cellulose fiber in the next cycle. It is recycled in this way. When the amount of recycled water is insufficient, the water supply device can be used to supplement fresh water to the modified dyeing reactor.

[0025] Dyeing wastewater can be recycled, stored and treated according to its color. Alkali-containing wastewater is discharged into a sewage pool for treatment. Dyeing wastewater without alkali added is stored in a recovery and storage device according to its color and reused according to its color during dyeing. The recycling rate of dyeing wastewater is improved, and sewage discharge is greatly reduced. At the same time, the energy consumption of water, electricity, steam, etc. during dyeing can also be reduced.

[0026] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall fall within the scope of the present invention. Any changes or substitutions that can be easily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A printing and dyeing modified dyeing water-saving and recycling device, comprising a modified dyeing reactor, characterized in that: The feed port of the modified dyeing reactor is respectively connected to the discharge port of the alkali solution supply device, the discharge port of the modifier supply device and the discharge port of the dye material device; the drain port of the modified dyeing reactor is connected to the inlet of the filter device; the outlet of the filter device is connected to the water inlet of the recycled water storage device; A porous filter tube is arranged inside the modified dyeing reactor, and an inlet of the porous filter tube is connected with a water outlet of a recycled water storage device through a water return port of the modified dyeing reactor.

2. A printing and dyeing modified dyeing water-saving and recycling device according to claim 1, characterized in that: The modified dyeing reactor comprises an openable top cover and a tank body.

3. A printing and dyeing modified dyeing water-saving and recycling device as claimed in claim 2, characterized in that: The feed inlet of the modified dyeing reactor comprises a dye feed inlet and a modifier feed inlet, and the dye feed inlet and the modifier feed inlet are respectively arranged on the side of the tank body.

4. A water-saving and reuse device for printing and dyeing modification according to claim 3, characterized in that: The dye feed port of the modified dyeing reactor is connected to the discharge port of the dye material device, and the modifier feed port of the modified dyeing reactor is connected to the discharge port of the alkali solution supply device and the discharge port of the modifier supply device through the first diversion pipe. The first diversion pipe is provided with a first water diversion valve.

5. The printing and dyeing modified dyeing water-saving and recycling device according to claim 1, characterized in that: The number of recycled water storage devices is at least two.

6. A printing and dyeing modified dyeing water-saving and recycling device as claimed in claim 5, characterized in that: The water outlet of the filter device is connected to the water inlet of the recycled water storage device through a second diversion pipe, and a second water diversion valve is provided on the second diversion pipe.

7. The water-saving and recycling device for printing and dyeing modification according to claim 1, characterized in that: A liquid level monitoring device is provided inside the modified dyeing reactor.

8. The water-saving and recycling device for printing and dyeing modification according to claim 1, characterized in that: The alkali solution supply device and the modifier supply device are respectively provided with temperature control devices.

9. The printing and dyeing modified dyeing water-saving and recycling device according to claim 1, characterized in that: The modified dyeing reactor, the alkali solution supply device, the modifier supply device, the dye material device, the filtering device and the recycled water storage device are all electrically connected to the PLC controller.

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