Temperature control device suitable for supercritical CO2 waterless dyeing equipment
By designing a temperature control device in the supercritical CO2 anhydrous dyeing equipment, using ethylene glycol freezer to exchange heat with thermal oil, the temperature increase caused by the residual heat of thermal oil is solved, and the color stability of the dyed product is improved.
Patent Information
- Application Number
- CN202421171348.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-27
AI Technical Summary
After the dyeing of the existing supercritical CO2 anhydrous dyeing equipment is completed, the residual heat of the thermally conductive oil will continue to increase the temperature in the dyeing kettle, resulting in poor color stability of the final product.
A temperature control device is designed, including a thermal oil device and a glycol refrigerant device. The thermally conductive oil device exchanges heat with the glycol freezer device through a plate heat exchanger to control the temperature of the thermally conductive oil to prevent it from continuing to heat the dyeing system.
The temperature in supercritical CO2 fluid staining is effectively controlled, color instability caused by residual heat of thermal conductivity oil is prevented, and more efficient temperature management is achieved.
Smart Images
Figure CN222524911U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of textile finishing and dyeing, and more specifically refers to a method suitable for supercritical CO 2 Temperature control device for waterless dyeing equipment. Background Art
[0002] Supercritical C0 2 As a clean dyeing technology, waterless dyeing has been widely used in China. During the dyeing process, the friction between the fluid and the tube wall will generate heat. Even if the heating of the heat transfer oil is stopped, the temperature in the dyeing kettle will continue to rise, resulting in poor color stability of the final product, especially for blended fabrics such as polyester / nylon / polyester / ammonia. Therefore, it is necessary to control the supercritical CO 2 Temperature in fluid dyeing.
[0003] At present, most of the methods adopt the method of passing circulating water through the jacket of the dye kettle to ensure the temperature inside the kettle. This method is simple but the effect is not ideal. There are also methods of making grooves on the outer surface of the multi-layer container and passing circulating water to reduce the thermal resistance to achieve the effect of lowering the temperature inside the dye kettle, but this method has a complex structure and is prone to clogging. 2 Temperature control device for waterless dyeing equipment. Utility Model Content
[0004] The utility model provides a method suitable for supercritical CO 2 The temperature control device of the waterless dyeing equipment is mainly used to overcome the existing supercritical CO 2 After the waterless dyeing equipment stops heating after dyeing is completed, the residual heat of the heat transfer oil will cause the temperature in the dyeing kettle to continue to rise, resulting in disadvantages such as poor color stability of the final product.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A method for supercritical CO 2 The temperature control device of the waterless dyeing equipment includes a heat transfer oil device, wherein the heat transfer oil device includes a heat transfer oil inlet pipeline, a heat transfer oil pipeline and a heat transfer oil outlet pipeline, and the heat transfer oil pipeline is arranged in a supercritical CO 2 The heat transfer oil is heated in the dyeing system, the heat transfer oil inlet pipeline and the heat transfer oil outlet pipeline are respectively connected to the front end and the rear end of the heat transfer oil pipeline, the temperature control device also includes an ethylene glycol refrigerant device for cooling the heat transfer oil inlet pipeline, the ethylene glycol refrigerant device includes an ethylene glycol refrigerant supply pipeline and an ethylene glycol refrigerant return pipeline, the ethylene glycol refrigerant in the ethylene glycol refrigerant supply pipeline performs heat exchange with the heat transfer oil in the heat transfer oil inlet pipeline, and the ethylene glycol refrigerant after heat exchange is output through the ethylene glycol refrigerant return pipeline.
[0007] In a preferred embodiment, the supercritical CO 2 A plate heat exchanger is provided at the front end of the dyeing system, and the plate heat exchanger is provided with a heat exchange pipeline 1 and a heat exchange pipeline 2. The heat transfer oil inlet pipeline consists of a first heat transfer oil inlet pipeline and a second heat transfer oil inlet pipeline. The first heat transfer oil inlet pipeline is connected to the inlet of the heat exchange pipeline 1, and the second heat transfer oil inlet pipeline is connected to the outlet of the heat exchange pipeline 1; the ethylene glycol refrigerant supply pipeline is connected to the inlet of the heat exchange pipeline 2, and the ethylene glycol refrigerant reflux pipeline is connected to the outlet of the heat exchange pipeline 2.
[0008] In a preferred embodiment, the temperature control device of the utility model also includes an oil temperature machine and a heat transfer oil return pipeline, one end of the heat transfer oil return pipeline is connected to the heat transfer oil outlet pipeline, and the other end is connected to the inlet of the oil temperature machine; the outlet of the oil temperature machine is connected to the first heat transfer oil inlet pipeline.
[0009] In a preferred embodiment, the thermal oil device further comprises a thermal oil replenishing pipeline, and the thermal oil replenishing pipeline is connected to the inlet of the oil temperature machine.
[0010] In a preferred embodiment, the temperature control device of the utility model also includes a PLC controller, a thermal oil switch valve is provided on the first thermal oil inlet pipeline, a refrigerant regulating valve is provided on the ethylene glycol refrigerant supply pipeline, and the PLC controller is electrically connected to the oil temperature machine, the thermal oil switch valve and the refrigerant regulating valve respectively.
[0011] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the beneficial effects produced by the utility model are:
[0012] 1. The temperature control device of this utility model is equipped with an ethylene glycol refrigerant device to control supercritical CO 2 The heat transfer oil inlet pipeline at the front end of the dyeing system is heat exchanged to control the temperature of the heat transfer oil to prevent it from still reacting with the supercritical CO after dyeing is completed. 2 The dyeing system continues to heat up, causing the product color to change. In addition, ethylene glycol refrigerant is used as the cooling medium, which has a high boiling point and a higher upper limit temperature of the adjustable oil temperature.
[0013] 2. The utility model adopts the method of introducing ethylene glycol refrigerant into the plate heat exchanger to exchange heat with the heat transfer oil, which can achieve a fast and ideal temperature exchange effect. It has a simple structure and strong practicality, and can effectively control the supercritical CO 2 Temperature in fluid dyeing. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0015] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.
[0016] A method for supercritical CO 2 Temperature control device of waterless dyeing equipment, refer to Figure 1 , including a heat transfer oil device and a glycol refrigerant device. The heat transfer oil device includes a heat transfer oil inlet pipeline 11, a heat transfer oil pipeline 12 and a heat transfer oil outlet pipeline 13. The heat transfer oil pipeline 12 is arranged in a supercritical CO 2 The heat is heated in the dyeing system 1 , and the heat-conducting oil inlet pipeline 11 and the heat-conducting oil outlet pipeline 13 are respectively connected to the front end and the rear end of the heat-conducting oil pipeline 12 .
[0017] Reference Figure 1 , the above supercritical C0 2 A plate heat exchanger 14 is provided at the front end of the dyeing system 1, and the plate heat exchanger is provided with a heat exchange pipeline 1 141 and a heat exchange pipeline 2 142. The above-mentioned heat transfer oil inlet pipeline 11 is composed of a first heat transfer oil inlet pipeline 111 and a second heat transfer oil inlet pipeline 112. A heat transfer oil switch valve 113 is provided on the first heat transfer oil inlet pipeline 111. The first heat transfer oil inlet pipeline 111 is connected to the inlet of the heat transfer pipeline 1 141, and one end of the second heat transfer oil inlet pipeline 112 is connected to the outlet of the heat transfer pipeline 1 141, and the other end is connected to the heat transfer oil outlet pipeline 13.
[0018] Reference Figure 1 The above-mentioned thermal oil device further includes an oil temperature machine 15, a thermal oil return pipeline 16 and a thermal oil supplement pipeline 17. One end of the thermal oil return pipeline 16 is connected to the thermal oil outlet pipeline 13, and the other end is connected to the inlet of the oil temperature machine 15; the outlet of the oil temperature machine 15 is connected to the first thermal oil inlet pipeline 111. The thermal oil supplement pipeline 17 is connected to the inlet of the oil temperature machine 15.
[0019] Reference Figure 1 The above-mentioned ethylene glycol refrigerant device includes an ethylene glycol refrigerant supply pipeline 21 and an ethylene glycol refrigerant return pipeline 22. The ethylene glycol refrigerant supply pipeline 21 is provided with a refrigerant regulating valve 211. The ethylene glycol refrigerant supply pipeline 21 is connected to the inlet of the heat exchange pipeline 142, and the ethylene glycol refrigerant return pipeline 22 is connected to the outlet of the heat exchange pipeline 142.
[0020] Reference Figure 1The above-mentioned ethylene glycol refrigerant device also includes an ethylene glycol storage tank 23, which is connected to the ethylene glycol refrigerant supply pipeline 21 and the ethylene glycol refrigerant return pipeline 22 respectively, and is used to centrally store ethylene glycol coolant, and can simultaneously process multiple sets of supercritical CO 2 Waterless dyeing system for effective temperature control.
[0021] Reference Figure 1 The temperature control device of the present invention also includes a PLC controller 2, which is electrically connected to the oil temperature machine 15, the thermal oil switch valve 113 and the refrigerant regulating valve 211, and is used to automatically control the oil temperature machine 15, the thermal oil switch valve 113 and the refrigerant regulating valve 211.
[0022] When the temperature needs to be raised, the PLC controller controls the oil temperature machine to start heating, heats the thermal oil, and the thermal oil switch valve opens. The thermal oil through the thermal oil pipeline heats the supercritical CO 2 The dyeing system heats up;
[0023] When the dyeing temperature is reached, the PLC controller lowers the set temperature of the oil temperature machine, and the oil temperature machine no longer heats up. It automatically adjusts according to the signal fed back by the temperature transmitter of the oil temperature machine. The refrigerant regulating valve connected to the ethylene glycol refrigerant supply pipeline opens, and the ethylene glycol refrigerant in the heat exchange pipeline 2 exchanges heat with the heat transfer oil in the heat exchange pipeline 1 through the plate heat exchanger to control the oil temperature and reach the entire supercritical C0 2 Temperature control purpose of dyeing system.
[0024] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.
Claims
1. A temperature control device suitable for supercritical CO2 waterless dyeing equipment, comprising a heat transfer oil device, the heat transfer oil device comprising a heat transfer oil inlet pipeline, a heat transfer oil pipeline and a heat transfer oil outlet pipeline, the heat transfer oil pipeline is arranged in a supercritical CO2 dyeing system to heat it, the heat transfer oil inlet pipeline and the heat transfer oil outlet pipeline are respectively connected to the front end and the rear end of the heat transfer oil pipeline, characterized in that: The temperature control device also includes an ethylene glycol refrigerant device for cooling the heat transfer oil inlet pipeline. The ethylene glycol refrigerant device includes an ethylene glycol refrigerant supply pipeline and an ethylene glycol refrigerant return pipeline. The ethylene glycol refrigerant in the ethylene glycol refrigerant supply pipeline exchanges heat with the heat transfer oil in the heat transfer oil inlet pipeline. The ethylene glycol refrigerant after heat exchange is output through the ethylene glycol refrigerant return pipeline.
2. A temperature control device suitable for supercritical CO2 anhydrous dyeing equipment as claimed in claim 1, characterized in that: A plate heat exchanger is provided at the front end of the supercritical C02 dyeing system, and the plate heat exchanger is provided with a heat exchange pipeline 1 and a heat exchange pipeline 2. The heat transfer oil inlet pipeline consists of a first heat transfer oil inlet pipeline and a second heat transfer oil inlet pipeline. The first heat transfer oil inlet pipeline is connected to the inlet of the heat exchange pipeline 1, and the second heat transfer oil inlet pipeline is connected to the outlet of the heat exchange pipeline 1; the ethylene glycol refrigerant supply pipeline is connected to the inlet of the heat exchange pipeline 2, and the ethylene glycol refrigerant reflux pipeline is connected to the outlet of the heat exchange pipeline 2.
3. A temperature control device suitable for supercritical CO2 anhydrous dyeing equipment as claimed in claim 2, characterized in that: It also includes an oil temperature machine and a heat transfer oil return pipeline, one end of the heat transfer oil return pipeline is connected to the heat transfer oil outlet pipeline, and the other end is connected to the inlet of the oil temperature machine; the outlet of the oil temperature machine is connected to the first heat transfer oil inlet pipeline.
4. A temperature control device suitable for supercritical CO2 anhydrous dyeing equipment as claimed in claim 3, characterized in that: It also includes a heat transfer oil replenishing pipeline, which is connected to the inlet of the oil temperature machine.
5. A temperature control device suitable for supercritical CO2 anhydrous dyeing equipment as claimed in claim 3, characterized in that: It also includes a PLC controller. A thermal oil switch valve is provided on the first thermal oil inlet pipeline, and a refrigerant regulating valve is provided on the ethylene glycol refrigerant supply pipeline. The PLC controller is electrically connected to the oil temperature machine, the thermal oil switch valve and the refrigerant regulating valve respectively.