Polyester fabric non-aqueous medium alkaline dyeing process equipment

Abstract

A non-aqueous alkaline dyeing process device for polyester fabrics is disclosed, relating to the field of textile printing and dyeing equipment, and particularly to a dedicated process device for non-aqueous alkaline dyeing of polyester fabrics. The sealed dyeing vessel contains a fabric carrying device; the bottom of the sealed dyeing vessel is connected to the inlet of the liquid circulation system, and the outlet of the stirring circulation system is connected to the sealed dyeing vessel via a pipeline; the outlet of the sealed dyeing vessel is connected to the mixing port of the alkali and medium ratio control unit, and the mixed dye liquor is then returned to the sealed dyeing vessel via a pipeline; a temperature control system is located on the outer wall of the vessel and connected to a controller; through a sealed structure, precise proportioning, stable temperature and pressure control, roller carrying, and medium recovery, it achieves efficient, uniform, energy-saving, and environmentally friendly alkaline dyeing of polyester fabrics in a non-aqueous medium.

Description

Technical Field

[0001] This utility model relates to the field of textile printing and dyeing equipment, and in particular to a special process equipment for non-aqueous alkaline dyeing of polyester fabrics. Background Technology

[0002] Polyester fabrics, lacking hydrophilic groups in their molecular structure, suffer from poor dye diffusion and low dye uptake during traditional aqueous dyeing processes. This process also consumes large amounts of alkali and water, resulting in high energy consumption and the generation of large quantities of highly alkaline wastewater, increasing the difficulty of subsequent treatment. In recent years, non-aqueous dyeing processes have been proposed to address these issues. By utilizing non-aqueous solvents such as alcohols, esters, or ionic liquids as dye liquor carriers, the adsorption and diffusion capacity of polyester fibers to alkaline dye liquors can be effectively improved, achieving uniform dyeing.

[0003] However, most existing non-aqueous alkaline dyeing equipment is an improvement on traditional water bath dyeing equipment, and generally suffers from the following shortcomings: First, the medium sealing is poor, which easily leads to the volatilization loss of non-aqueous media; second, the ratio control precision of alkali and non-aqueous media is insufficient, resulting in poor dyeing uniformity; third, the temperature and pressure control system is not responsive in time, making it difficult to maintain a stable process environment; and fourth, the waste liquid recovery and regeneration functions are weak, making it difficult to efficiently recycle non-aqueous media, which increases production costs and environmental burden. Utility Model Content

[0004] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a non-aqueous alkaline dyeing process equipment for polyester fabrics. Through a sealed structure, precise proportioning, stable temperature and pressure control, roller bearing, and medium recovery, it achieves efficient, uniform, energy-saving, and environmentally friendly alkaline dyeing of polyester fabrics in a non-aqueous medium.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a sealed dyeing vessel 1, a stirring and circulating system 2, an alkali and medium ratio control unit 3, a temperature control system 4, a pressure regulation and safety unit 5, a fabric carrying device 6, and a waste liquid recovery and regeneration module 7; the sealed dyeing vessel 1 is equipped with a fabric carrying device 6 inside; the bottom of the sealed dyeing vessel 1 is connected to the inlet of the stirring and circulating system 2, and the outlet of the stirring and circulating system 2 is connected to the sealed dyeing vessel 1 through a pipeline; the outlet of the sealed dyeing vessel 1 is connected to the mixing port of the alkali and medium ratio control unit 3, and the mixed dye liquor is then returned to the sealed dyeing vessel 1 through a pipeline; the temperature control system 4 is installed on the outer wall of the vessel 1 and connected to the controller; the upper part of the sealed dyeing vessel 1 is connected to the pressure regulation and safety unit 5 for monitoring and controlling the pressure inside the vessel; the outlet of the sealed dyeing vessel 1 is connected to the waste liquid recovery and regeneration module 7 through the alkali and medium ratio control unit 3.

[0006] The sealed dyeing vessel 1 has a double-layer structure, including a corrosion-resistant metal inner liner 11 and an outer heat insulation layer 12. The sealed dyeing vessel 1 is provided with a liquid inlet 13, a liquid outlet and an observation window.

[0007] The stirring and circulating system 2 includes an inlet pump 21, a storage tank 22, and a reflux pump 23. The inlet pump 21 is connected to the outlet of the storage tank 22 and the inlet 13 of the sealed dyeing vessel 1. The reflux pump 23 is connected to the return port of the alkali and medium ratio control unit 3, and the outlet of the reflux pump 23 is connected to the storage tank 22.

[0008] The alkali and medium ratio control unit 3 is a solution ratio mixer.

[0009] The temperature control system 4 includes an outer electric heating jacket 41 and a temperature sensor 42. The electric heating jacket 41 is disposed between the two layers of the sealed dyeing vessel 1, and the temperature sensor 42 is disposed on the outside of the sealed dyeing vessel 1 with the detection head inserted into the sealed dyeing vessel 1.

[0010] The fabric carrying device 6 includes a rotatable roller 61 and a drive motor 62. The drive motor 62 is located on the outside of the sealed dyeing kettle body 1 and is connected to the rotatable roller 61 through a rotating shaft.

[0011] The waste liquid recovery and regeneration module 7 includes a cylinder 71 and a condenser pipe 72. The waste liquid recovery and regeneration module 7 is connected to the alkali and medium ratio control unit 3 through a pipeline.

[0012] The working principle of this utility model is as follows: the sealed dyeing kettle body 1 serves as the core of the dyeing reaction, and the fabric carrying device 6 places the polyester fabric in the rotating drum inside the kettle body. Under the drive of the drive motor 62, the drum rotates slowly, allowing the fabric to fully expand in the dye liquor.

[0013] The dye liquor is supplied by the stirring and circulation system 2. The inlet pump 21 transports the solution in the storage tank 22 to the reactor body 1. The stirring and circulation, along with the drum rotation, work together to ensure that the dye liquor is evenly distributed inside the reactor body. The outlet of the reactor body 1 is connected to the alkali and medium ratio control unit 3. The ratio mixer precisely mixes the alkali and non-aqueous medium. The mixed dye liquor is then returned to the reactor body 1, achieving dynamic circulation.

[0014] The temperature control system 4 provides stable heating through an electric heating jacket 41 installed in the vessel jacket, and the temperature sensor 42 detects and feeds back the temperature to the controller in real time, keeping the process temperature stable within the set range. The pressure regulation and safety unit 5 monitors the pressure inside the vessel in real time, and automatically vents or depressurizes when the pressure exceeds the set value to ensure safe operation of the equipment.

[0015] After dyeing is completed, the waste liquid is discharged through the drain port of the vessel 1 and introduced into the waste liquid recovery and regeneration module 7 through the alkali and medium ratio control unit 3. The condenser tube 72 in the module condenses and recovers the medium, and the cylinder 71 and the filter unit separate the impurities, thereby realizing the recycling of non-aqueous media.

[0016] By adopting the above technical solutions, this utility model improves the sealing and heat preservation performance of the equipment through the double-layer structure design of the sealed dyeing kettle, avoiding the evaporation loss of non-aqueous media; the alkali and media ratio control unit can achieve precise solution ratio, making the dye liquor concentration stable and ensuring the uniformity and dyeing rate of polyester fabrics; the temperature control system and pressure regulation unit work together to keep the process environment within a constant temperature and safe pressure range, ensuring the stability and reliability of the dyeing process; the fabric carrying device adopts a rotatable roller, which allows the fabric to fully stretch and turn during the dyeing process, effectively reducing wrinkles and color differences; at the same time, the waste liquid recovery and regeneration module realizes the condensation and recycling of non-aqueous media, which greatly reduces production costs and waste liquid discharge, thus making the entire dyeing process more green and environmentally friendly while maintaining high efficiency and stability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Sealed dyeing vessel body; 2. Stirring and circulation system; 3. Alkali and medium ratio control unit; 4. Temperature control system; 5. Pressure regulation and safety unit; 6. Fabric support device; 7. Waste liquid recovery and regeneration module; 8. Corrosion-resistant metal inner liner; 11. Outer thermal insulation layer; 12. Liquid inlet; 13. Liquid inlet pump; 21. Liquid storage tank; 22. Reflux pump; 23. Outer electric heating jacket; 41. Temperature sensor; 42. Rotatable drum; 61. Drive motor; 62. Cylinder body; 71. Condenser pipe; 72. Detailed Implementation

[0020] See Figure 1As shown, the technical solution adopted in this specific embodiment is as follows: it includes a sealed dyeing vessel 1, a stirring and circulating system 2, an alkali and medium ratio control unit 3, a temperature control system 4, a pressure regulation and safety unit 5, a fabric carrying device 6, and a waste liquid recovery and regeneration module 7; the sealed dyeing vessel 1 is equipped with a fabric carrying device 6 inside; the bottom of the sealed dyeing vessel 1 is connected to the inlet of the stirring and circulating system 2, and the outlet of the stirring and circulating system 2 is connected to the sealed dyeing vessel 1 through a pipeline; the outlet of the sealed dyeing vessel 1 is connected to the alkali and medium ratio control unit 3. The mixing port of the dyeing vessel is used to return the mixed dye solution to the sealed dyeing vessel 1 via a pipeline. The temperature control system 4 is located on the outer wall of the vessel 1 and connected to the controller. The upper part of the sealed dyeing vessel 1 is connected to a pressure regulating and safety unit 5 for monitoring and controlling the pressure inside the vessel. The drain port of the sealed dyeing vessel 1 is connected to the waste liquid recovery and regeneration module 7 through the alkali and medium ratio control unit 3. The sealed dyeing vessel 1 has a double-layer structure, including a corrosion-resistant metal inner liner 11 and an outer heat insulation layer 12. The sealed dyeing vessel 1 is provided with a liquid inlet 13, a liquid outlet, and an observation window. The stirring and circulation system 2 includes a liquid inlet pump 21, a liquid storage tank 22, and a reflux pump 23. The liquid inlet pump 21 is connected to the liquid outlet of the liquid storage tank 22 and the liquid inlet 13 of the sealed dyeing vessel 1. The reflux pump 23 is connected to the return port of the alkali and medium ratio control unit 3, and the liquid outlet of the reflux pump 23 is connected to the liquid storage tank 22. The alkali and medium ratio control unit 3 is a solution ratio mixer. The temperature control system 4 includes an outer electric heating jacket 41 and a temperature sensor 42. The electric heating jacket 41 is disposed between the two layers of the sealed dyeing kettle body 1. The temperature sensor 42 is disposed on the outside of the sealed dyeing kettle body 1 and its detection head is inserted into the sealed dyeing kettle body 1. The fabric carrying device 6 includes a rotatable roller 61 and a drive motor 62. The drive motor 62 is disposed on the outside of the sealed dyeing kettle body 1 and connected to the rotatable roller 61 via a rotating shaft. The waste liquid recovery and regeneration module 7 includes a cylinder 71 and a condenser pipe 72. The waste liquid recovery and regeneration module 7 is connected to the alkali and medium ratio control unit 3 via a pipeline.

[0021] It uses a sealed dyeing vessel 1 as the core of the dyeing reaction. A fabric carrying device 6 places the polyester fabric in a rotating drum inside the vessel, which rotates slowly under the drive of a motor 62, allowing the fabric to fully expand in the dye liquor. The dye liquor is supplied by a stirring and circulation system 2. An inlet pump 21 delivers the solution from a storage tank 22 to the vessel 1. The stirring and circulation, along with the drum rotation, ensures the dye liquor is evenly distributed inside the vessel. The outlet of the vessel 1 is connected to an alkali and medium ratio control unit 3. A ratio mixer precisely proportions the alkali and non-aqueous medium, and the mixed dye liquor is then returned to the vessel 1, achieving dynamic circulation. A temperature control system 4 provides stable heating through an electric heating jacket 41 located in the vessel's jacket. A temperature sensor 42 detects and feeds back the temperature to the controller in real time, maintaining the process temperature within the set range. A pressure regulation and safety unit 5 monitors the pressure inside the vessel in real time. When the pressure exceeds the set value, it automatically vents or releases pressure to ensure safe operation of the equipment. After dyeing is completed, the waste liquid is discharged through the drain port of the vessel 1 and introduced into the waste liquid recovery and regeneration module 7 through the alkali and medium ratio control unit 3. The condenser tube 72 in the module condenses and recovers the medium, and the cylinder 71 and the filter unit separate the impurities, thereby realizing the recycling of non-aqueous media.

[0022] This specific embodiment improves the sealing and heat preservation performance of the equipment through the double-layer structure design of the sealed dyeing kettle, avoiding the evaporation loss of non-aqueous media. The alkali and media ratio control unit can achieve precise solution ratio, ensuring stable dye concentration and guaranteeing the uniformity and dyeing rate of polyester fabrics. The temperature control system and pressure regulation unit work together to keep the process environment within a constant temperature and safe pressure range, ensuring the stability and reliability of the dyeing process. The fabric carrying device uses a rotatable roller, allowing the fabric to fully stretch and tumble during the dyeing process, effectively reducing wrinkles and color differences. At the same time, the waste liquid recovery and regeneration module realizes the condensation and recycling of non-aqueous media, significantly reducing production costs and waste liquid discharge, thus making the entire dyeing process more green and environmentally friendly while maintaining high efficiency and stability.

[0023] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A non-aqueous alkaline dyeing process device for polyester fabrics, characterized in that: It includes a sealed dyeing vessel (1), a stirring and circulating system (2), an alkali and medium ratio control unit (3), a temperature control system (4), a pressure regulation and safety unit (5), a fabric carrying device (6), and a waste liquid recovery and regeneration module (7); the sealed dyeing vessel (1) is equipped with a fabric carrying device (6); the bottom of the sealed dyeing vessel (1) is connected to the inlet of the stirring and circulating system (2), and the outlet of the stirring and circulating system (2) is connected to the sealed dyeing vessel (1) through a pipeline; the outlet of the sealed dyeing vessel (1) is connected to the mixing port of the alkali and medium ratio control unit (3), and the mixed dye liquid is then returned to the sealed dyeing vessel (1) through a pipeline; the temperature control system (4) is set on the outer wall of the vessel (1) and connected to the controller; the upper part of the sealed dyeing vessel (1) is connected to the pressure regulation and safety unit (5) for monitoring and controlling the pressure inside the vessel; the outlet of the sealed dyeing vessel (1) is connected to the waste liquid recovery and regeneration module (7) through the alkali and medium ratio control unit (3).

2. The equipment for a non-aqueous alkaline dyeing process of polyester fabrics according to claim 1, characterized in that: The sealed dyeing vessel body (1) has a double-layer structure, which includes a corrosion-resistant metal inner liner (11) and an outer heat insulation layer (12). The sealed dyeing vessel body (1) is provided with an inlet (13), an outlet and an observation window.

3. The equipment for a non-aqueous alkaline dyeing process of polyester fabrics according to claim 1, characterized in that: The stirring circulation system (2) includes an inlet pump (21), a storage tank (22), and a reflux pump (23). The inlet pump (21) is connected to the outlet of the storage tank (22) and the inlet (13) of the sealed dyeing vessel (1). The reflux pump (23) is connected to the return port of the alkali agent and medium ratio control unit (3). The outlet of the reflux pump (23) is connected to the storage tank (22).

4. The equipment for a non-aqueous alkaline dyeing process of polyester fabrics according to claim 1, characterized in that: The alkali and medium ratio control unit (3) is a solution ratio mixer.

5. The equipment for a non-aqueous alkaline dyeing process of polyester fabrics according to claim 1, characterized in that: The temperature control system (4) includes an outer electric heating jacket (41) and a temperature sensor (42). The electric heating jacket (41) is located between the two layers of the sealed dyeing vessel body (1), and the temperature sensor (42) is located on the outside of the sealed dyeing vessel body (1) with the detection head inserted into the sealed dyeing vessel body (1).

6. The equipment for a non-aqueous alkaline dyeing process of polyester fabric according to claim 1, characterized in that: The fabric carrying device (6) includes a rotatable roller (61) and a drive motor (62). The drive motor (62) is located on the outside of the sealed dyeing kettle body (1) and connected to the rotatable roller (61) via a rotating shaft.

7. The equipment for a non-aqueous alkaline dyeing process of polyester fabrics according to claim 1, characterized in that: The waste liquid recovery and regeneration module (7) includes a cylinder (71) and a condenser (72). The waste liquid recovery and regeneration module (7) is connected to the alkali and medium ratio control unit (3) through a pipeline.

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