Subcritical anhydrous deoiling and decolorizing machine

Abstract

The utility model particularly discloses a subcritical waterless deoiling and decoloring machine which comprises a cleaning box and a drying box, the cleaning box is communicated with the drying box, the cleaning box and the drying box are both in a micro-negative pressure state, and when the machine works, grey cloth passes through the cleaning box and the drying box in sequence by winding a cloth guide roller; wherein a spraying mechanism is arranged in the cleaning box, and the spraying mechanism is used for spraying subcritical fluid to the part, located in the cleaning box, of the gray fabric or the dyed fabric; a drying mechanism is arranged in the drying box and used for baking the part, located in the drying box, of the gray fabric. Lubricating oil or flooding in the fabric is extracted out through subcritical fluid at low temperature, water cleaning is replaced, energy is saved, emission is reduced, and the device is more environmentally friendly; and continuous feeding and continuous discharging are achieved, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of textile equipment, and in particular to a subcritical anhydrous degreasing and decolorizing machine. Background Technology

[0002] During the process of turning yarn into greige fabric through a knitting machine, the fabric will be contaminated with some lubricating oil, which accounts for about 3% of the fabric's weight. If this lubricating oil is not removed properly, it will have serious consequences in the subsequent dyeing process.

[0003] Currently, most manufacturers use hot water with surfactants or alkalis to clean the lubricating oil in the fabric, which results in a large amount of wastewater and is detrimental to the environment. Summary of the Invention

[0004] The purpose of this application is to provide a subcritical anhydrous degreasing and decolorizing machine that uses subcritical fluid at low temperature to extract lubricating oil from fabrics, replacing water washing, saving energy and reducing emissions, and is more environmentally friendly; it also realizes continuous feeding and continuous discharge, greatly improving production efficiency.

[0005] To achieve the above objectives, this application provides:

[0006] Design a subcritical anhydrous degreasing and decolorizing machine, including a cleaning box and a drying box, which are connected to each other and are both under a slight negative pressure. During operation, the fabric passes through the cleaning box and the drying box in sequence via a guide roller.

[0007] The cleaning tank is equipped with a spraying mechanism, which is used to spray subcritical fluid onto the portion of the fabric located inside the cleaning tank.

[0008] The drying chamber is equipped with a drying mechanism for baking the portion of the fabric located inside the drying chamber.

[0009] Furthermore, the cleaning outlet of the cleaning box is connected to the drying inlet pipe of the drying box.

[0010] Furthermore, the spraying mechanism includes:

[0011] A wire roller installed inside the cleaning box for the fabric to be wound.

[0012] And a first spray head located inside the screen roller and a second spray head located outside the screen roller.

[0013] Furthermore, it also includes a cleaning tank located inside the cleaning box, which is used to collect subcritical fluid dripping from the fabric.

[0014] The mesh roller, the first spray head, and the second spray head are all located inside the cleaning tank.

[0015] Furthermore, the main shaft of the mesh roller is provided with an axial channel, which is connected to a first spray head installed on the main shaft, and both the axial channel and the second spray head are connected to a tank pipe storing subcritical fluid via a suction pump.

[0016] Furthermore, the drying mechanism includes heating rollers for winding the fabric.

[0017] The heating roller is an electromagnetic heating roller.

[0018] Furthermore, the first exhaust port of the cleaning box and the second exhaust port of the drying box are respectively connected to a first negative pressure exhaust fan and a second negative pressure exhaust fan; and the cleaning box and the drying box are respectively provided with a first return air port and a second return air port;

[0019] The first negative pressure exhaust fan and the second negative pressure exhaust fan are both connected to the recycling system unit pipe.

[0020] Furthermore, a first concentration sensor for detecting the concentration of subcritical fluid gas is provided at the first inlet of the cleaning box; the first concentration sensor is electrically connected to the first negative pressure exhaust fan via a controller;

[0021] The drying oven is equipped with a second concentration sensor at the second outlet for detecting the concentration of subcritical fluid gas; the second concentration sensor is electrically connected to the second negative pressure exhaust fan via a controller.

[0022] Furthermore, both the first and second return air inlets are equipped with heating devices for regulating the temperature of the incoming air; and the heating devices are hot air blowers.

[0023] Furthermore, the subcritical fluid includes at least one of hydrofluoroether and tetrafluoroethane, butane and isopropane.

[0024] Compared to the aforementioned background technology, this utility model provides a subcritical anhydrous degreasing and decolorizing machine. The fabric enters the cleaning chamber through the first inlet and is sprayed with subcritical fluid by a spraying mechanism. The subcritical fluid extracts lubricating oil from the fabric or loose dye from the dyed fabric. Under gravity, the extracted lubricating oil and subcritical fluid fall off the fabric, thus separating them. The fabric then enters the drying chamber, where a drying mechanism heats it to evaporate the subcritical fluid adhering to it, ultimately separating the subcritical fluid completely from the fabric. The evaporated gas is collected to ensure that the fabric exiting the drying chamber from the second outlet is dry.

[0025] This device uses subcritical fluid at low temperature to extract lubricating oil or loose dye from fabrics, replacing water washing, saving energy and reducing emissions, making it more environmentally friendly; it also achieves continuous feeding and continuous discharge, greatly improving production efficiency; and by collecting the volatile gases from the subcritical fluid, it can achieve recycling and avoid overflow pollution of the air. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application 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 embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Appendix Figure 1 Schematic diagram of a subcritical anhydrous oil and color degreasing machine;

[0028] in:

[0029] 1. First fabric inlet, 2. Washing box, 3. First return air outlet, 4. Greige fabric, 5. Heating roller, 6. Second fabric outlet, 7. Washing tank, 8. Mesh roller, 9. First exhaust outlet. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 As shown in the embodiment of this application, a subcritical anhydrous degreasing and decolorizing machine is provided, including a cleaning tank 2 and a drying tank. The cleaning tank 2 and the drying tank are connected and both are under a slight negative pressure. During operation, the fabric 4 passes through the cleaning tank 2 and the drying tank in sequence via a guide roller. The cleaning tank 2 is equipped with a spraying mechanism to spray subcritical fluid onto the portion of the fabric 4 located inside the cleaning tank 2. The drying tank is equipped with a drying mechanism to bake the portion of the fabric 4 located inside the drying tank.

[0033] When using the subcritical anhydrous degreasing and decolorizing machine provided by this utility model, the raw fabric 4 enters the cleaning tank 2 through the first inlet of the cleaning tank 2 and is sprayed with subcritical fluid by the spraying mechanism. The subcritical fluid is used to extract the lubricating oil on the raw fabric 4, and the extracted lubricating oil and subcritical fluid fall off the raw fabric 4 under the action of gravity, thereby separating the lubricating oil from the raw fabric 4. Then the raw fabric 4 or dyed fabric enters the drying tank, and the drying mechanism heats the raw fabric 4 to make the subcritical fluid attached to the raw fabric 4 evaporate, thereby finally separating the subcritical fluid completely from the raw fabric 4. The gas evaporated by the subcritical fluid can be collected to ensure that the raw fabric 4 discharged from the second outlet 6 of the drying tank is dry.

[0034] This device uses subcritical fluid at low temperature to extract lubricating oil or loose dye from fabrics, replacing water washing, saving energy and reducing emissions, making it more environmentally friendly; it also achieves continuous feeding and continuous discharge, greatly improving production efficiency; and by collecting the volatile gases from the subcritical fluid, it can achieve recycling and avoid overflow pollution of the air.

[0035] It should be noted that subcritical fluids can dissolve dyes, and thus can remove excess dye from the surface of dyed fabrics.

[0036] Based on the above embodiment, the cleaning outlet of the cleaning box 2 and the drying inlet of the drying box are connected, and the fabric 4 passes through the cleaning outlet and the drying inlet in sequence; in order to prevent the gas formed by the evaporation of subcritical fluid in the cleaning box 2 and the drying box from overflowing, it is necessary to ensure that the cleaning outlet and the drying inlet are sealed.

[0037] Based on the above embodiments, the spraying mechanism includes: a wire roller 8 disposed in the cleaning tank 2 and through which the fabric 4 is wound; and a first spray head located inside the wire roller 8 and a second spray head located outside the wire roller 8.

[0038] During operation, the fabric 4 is guided onto the screen roller 8. There are several first spray heads and second spray heads inside and outside the screen roller 8 to spray subcritical fluid. The subcritical fluid is evenly sprayed onto the surface of the fabric 4, including the front and back sides of the fabric 4. After rinsing the fabric 4, the subcritical fluid extracts and absorbs the lubricating oil and then detaches from the fabric 4 and falls off.

[0039] Based on the above embodiment, a cleaning tank 7 is also provided in the cleaning tank 2, which is used to collect the subcritical fluid dripping from the fabric 4; wherein the wire roller 8, the first spray head and the second spray head are all located in the cleaning tank 7; thereby, the subcritical fluid can be collected quickly.

[0040] Based on the above embodiment, the main shaft of the mesh roller 8 is provided with an axial channel, which is connected to a first spray head installed on the main shaft, and both the axial channel and the second spray head are connected to a tank pipe storing subcritical fluid through a suction pump.

[0041] The aforementioned cleaning tank 7 can be configured to be connected to the tank body via a pump.

[0042] It should be noted that the mesh roller 8 is an existing device in the field. Its main shaft remains stationary, while the mesh roller sleeve on the main shaft rotates. This allows the subcritical fluid to be pumped into the axial channel of the main shaft, thereby spraying it from the first spray head onto the inside of the fabric 4; while the subcritical fluid pumped to the second spray head is sprayed onto the outside of the fabric 4.

[0043] Based on the above embodiments, the drying mechanism includes a heating roller 5 for winding the fabric 4; wherein the heating roller 5 is an electromagnetic heating roller 5;

[0044] The fabric 4, after being cleaned in the cleaning tank 2, passes through at least one heating roller 5, which fully heats the subcritical solvent fluid inside into gas and evaporates it completely, thereby achieving waterless cleaning.

[0045] Based on the above embodiments, the first exhaust port 9 of the cleaning box 2 and the second exhaust port of the drying box are respectively connected to a first negative pressure exhaust fan and a second negative pressure exhaust fan; and the cleaning box 2 and the drying box are respectively provided with a first return air port 3 and a second return air port.

[0046] For better technical results, based on the above embodiments, the volatile gas (gas formed by the evaporation of subcritical fluid) enters the recovery system unit through the first negative pressure exhaust fan and the second negative pressure exhaust fan to achieve the collection and harmless treatment of the gas formed by the evaporation of subcritical fluid; and the gas evaporating from subcritical fluid is collected and converted into liquid for reuse; wherein, the recovery system unit is existing technology used to recover subcritical fluid, and will not be described in detail.

[0047] Based on the above embodiment, a first concentration sensor for detecting the concentration of subcritical fluid gas is provided at the first inlet 1 of the cleaning box 2; the first concentration sensor is electrically connected to the first negative pressure exhaust fan through a controller.

[0048] A second concentration sensor for detecting the concentration of subcritical fluid gas is installed at the second cloth outlet 6 of the drying oven; the second concentration sensor is electrically connected to the second negative pressure exhaust fan through a controller.

[0049] That is, when the concentration of the gas formed by the evaporation of the subcritical fluid is higher than the set value, the air volume of the corresponding exhaust port is adjusted to regulate the concentration in the cleaning box 2 or drying box, so as to avoid overflow and affect the evaporation of the subcritical fluid on the fabric 4.

[0050] Based on the above embodiment, both the first return air inlet 3 and the second return air inlet are equipped with heating devices for adjusting the temperature of the incoming air; and the heating device is a hot air blower; by adjusting the temperature of the gas entering the cleaning box 2 and the drying box, the gas temperature in the cleaning box 2 can be kept between 10-25°C, reducing the evaporation rate of the subcritical fluid in the cleaning box 2, and enabling the reuse of the subcritical fluid falling into the cleaning tank 7.

[0051] It is necessary to ensure that the gas temperature inside the drying oven is between 40-70℃ so that the solvent in the fabric can completely evaporate.

[0052] Based on the above embodiments, the subcritical fluid includes at least one of hydrofluoroether, tetrafluoroethane, butane, and isopropane, which are existing products in the art and will not be described in detail here.

[0053] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities.

[0054] The present invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A subcritical anhydrous oil degreasing and decolorizing machine, characterized in that, It includes a cleaning box and a drying box, which are connected to each other. Both the cleaning box and the drying box are under a slight negative pressure. During operation, the fabric passes through the cleaning box and the drying box in sequence via the guide roller. The cleaning tank is equipped with a spraying mechanism, which is used to spray subcritical fluid onto the portion of the raw fabric or dyed fabric located in the cleaning tank. The drying chamber is equipped with a drying mechanism for baking the portion of the fabric located inside the drying chamber.

2. The subcritical anhydrous degreasing and decolorizing machine according to claim 1, characterized in that, The cleaning outlet of the cleaning box is connected to the drying inlet of the drying box.

3. The subcritical anhydrous degreasing and decolorizing machine according to claim 2, characterized in that, The spraying mechanism includes: A wire roller installed inside the cleaning box for the fabric to be wound. And a first spray head located inside the screen roller and a second spray head located outside the screen roller.

4. The subcritical anhydrous degreasing and decolorizing machine according to claim 3, characterized in that, It also includes a cleaning tank set inside the cleaning box, which is used to collect subcritical fluid dripping from the fabric. The mesh roller, the first spray head, and the second spray head are all located inside the cleaning tank.

5. The subcritical anhydrous degreasing and decolorizing machine according to claim 4, characterized in that, The main shaft of the screen roller is provided with an axial channel, which is connected to a first spray head installed on the main shaft. Both the axial channel and the second spray head are connected to a tank pipe storing subcritical fluid via a suction pump.

6. The subcritical anhydrous degreasing and decolorizing machine according to claim 1, characterized in that, The drying mechanism includes heating rollers for winding the fabric. The heating roller is an electromagnetic heating roller.

7. The subcritical anhydrous degreasing and decolorizing machine according to claim 1, characterized in that, The first exhaust port of the cleaning box and the second exhaust port of the drying box are respectively connected to a first negative pressure exhaust fan and a second negative pressure exhaust fan; and the cleaning box and the drying box are respectively provided with a first return air port and a second return air port. The first negative pressure exhaust fan and the second negative pressure exhaust fan are both connected to the recycling system unit pipe.

8. The subcritical anhydrous degreasing and decolorizing machine according to claim 7, characterized in that, The first inlet of the cleaning box is equipped with a first concentration sensor for detecting the concentration of subcritical fluid gas; the first concentration sensor is electrically connected to the first negative pressure exhaust fan via a controller; The drying oven is equipped with a second concentration sensor at the second outlet for detecting the concentration of subcritical fluid gas; the second concentration sensor is electrically connected to the second negative pressure exhaust fan via a controller.

9. The subcritical anhydrous degreasing and decolorizing machine according to claim 7, characterized in that, Both the first and second return air inlets are equipped with heating devices for regulating the temperature of the incoming air; and the heating devices are hot air blowers.

10. The subcritical anhydrous degreasing and decolorizing machine according to claim 1, characterized in that, The subcritical fluid includes at least one of hydrofluoroether, tetrafluoroethane, butane, and isopropane.

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