Spunlaced non-woven fabric production system based on ozone bleaching

Abstract

The utility model belongs to the technical field of textile, and particularly relates to a spunlace non-woven fabric production system based on ozone bleaching. The spunlace non-woven fabric production system based on ozone bleaching comprises a winding and unwinding mechanism, a steaming washing mechanism, an ozone bleaching mechanism, a washing mechanism, a roller drying mechanism and a winding mechanism which are sequentially arranged in the fiber web conveying direction. The ozone bleaching device is integrated in the spunlaced non-woven fabric production line technology, so that the production efficiency can be improved and the production resources can be saved on the basis of solving the problems of serious waste of water resources, unenvironment-friendly chemical agents and the like in the existing hydrogen peroxide bleaching process.

Description

Technical Field

[0001] The utility model belongs to the technical field of textiles, and in particular relates to a spunlace nonwoven fabric production system based on ozone bleaching. Background Art

[0002] The whiteness of cotton fabrics is an important indicator for evaluating their performance, so bleaching is a very important procedure in the textile industry. Bleaching is a process that uses chemical reactions to decompose and decolorize colored substances in textiles so that the textiles can obtain the necessary whiteness. Natural fiber textiles contain natural or added colored substances, which remain even after scouring and need to be bleached to decolorize. Some synthetic fibers will turn yellow after heat setting and also need to be bleached. There are two types of bleaching agents: oxidizing and reducing, and oxidizing bleaching agents are commonly used.

[0003] However, the environmental pollution caused by bleaching is extremely serious, especially the pollution of bleaching wastewater. Most domestic and foreign companies use sodium hypochlorite method and hydrogen peroxide method to bleach cotton fabrics. The sodium hypochlorite bleaching process has serious environmental pollution and should be abandoned. The hydrogen peroxide bleaching method requires the addition of multiple additives and multiple rinsings with steam heating. The consumption of chemical raw materials, water and steam is large, the process cost is high, and the strength of the cotton fabric after bleaching is lost, causing the fiber to be brittle. The current method for bleaching fiber textiles is to put the textile to be bleached into the bleaching solution and let it stand for bleaching, and take it out after the bleaching is completed. This bleaching method has a slow bleaching speed and uneven bleaching of the textile. Ozone is a natural substance, which usually has a strong oxidative bleaching ability at room temperature and can self-decompose in a short time. Bleaching with ozone can save energy, reduce the use of chemicals, reduce sewage discharge, reduce environmental load, and reduce CO2 emissions. Because ozone has active chemical properties and is easy to decompose, there is currently no production device that can bleach non-woven fabrics in large quantities.

[0004] The Chinese patent publication number is CN207347824U, and the name of the invention is "An Ozone Bleaching Device". The patent discloses an ozone bleaching device, including a pulp discharger, a pressure regulating valve, an annular bearing platform, a motor I, a central pipe branch, a pulp hanging mesh, a liquid level sensor, a constant pressure pump, an infrared moisture meter, a box, a central pipe, a motor II, a pulp accumulation cone pool, and a universal coupling. The utility model device integrates the processes of pulp hanging, pulp dehydration, ozone bleaching and pulp washing, which greatly shortens the process flow and reduces production costs. The device has a simple structure, strong operability, and good bleaching effect. However, the pulp discharger, annular bearing platform, pulp hanging mesh, liquid level sensor and other devices set for pulping and papermaking in this ozone bleaching device are not suitable for all-cotton spunlace non-woven fabric production lines. At present, there is no ozone bleaching device that can be integrated into the all-cotton spunlace non-woven fabric production line.

[0005] The existing production process of 100% cotton spunlace nonwoven fabrics is as follows: fiber raw material grabbing → opening, mixing, and removing impurities → carding into a web → spunlace → winding → de-bleaching → drying → winding. In the de-bleaching stage, the nonwoven fabric needs to be rolled up after the spunlace process and transferred to the finishing area for bleaching using bleaching agents such as hydrogen peroxide or sodium hypochlorite. Utility Model Content

[0006] In order to solve the deficiencies of the existing technology, the utility model provides a spunlace nonwoven production system based on ozone bleaching. The utility model integrates an ozone bleaching device in the spunlace nonwoven production line technology, which can improve production efficiency and save production resources on the basis of solving the problems of serious waste of water resources and environmental unfriendliness of chemical agents in the existing hydrogen peroxide bleaching process.

[0007] The technical solution provided by the utility model is as follows:

[0008] A spunlace nonwoven fabric production system based on ozone bleaching at least comprises an air steam washing mechanism and an ozone bleaching mechanism which are sequentially arranged along the conveying direction of the fiber web.

[0009] In the above technical solution:

[0010] Based on the existing spunlace cotton nonwoven fabric process, after the spunlace process, the nonwoven fabric is steamed and washed, so that the spunlace nonwoven fabric can have a suitable humidity after steaming. Then the spunlace nonwoven fabric is sent to the ozone bleaching device, and the wet spunlace nonwoven fabric can be fully and efficiently bleached in ozone.

[0011] Furthermore, it includes a winding and unwinding mechanism, an air steam washing mechanism, an ozone bleaching mechanism, a washing mechanism, a drum drying mechanism and a winding mechanism which are sequentially arranged along the conveying direction of the fiber web.

[0012] Based on the above technical scheme, the combined technology of steam washing and ozone bleaching plus water washing can directly replace the debleaching in the existing hydroentanglement process to achieve the same technical effect as the existing bleaching process (hypochlorite bleaching, hydrogen peroxide bleaching).

[0013] Specifically, the ozone bleaching mechanism includes an ozone generator, an air compressor, a gas storage device, a bleaching reaction box and an exhaust gas processor which are connected in sequence.

[0014] In the above technical solution:

[0015] The ozone generator generates ozone gas. The generated ozone gas is transported to the gas storage tank (2-3 groups) for storage through the air compressor;

[0016] The bleaching reaction box is a closed container with narrow fiber mesh inlet and outlet to avoid large-scale leakage of ozone;

[0017] The inner wall of the bleaching reaction box is provided with 6-8 groups of conveying rollers. When the ozone gas pressure in the reaction box reaches the preset value, the conveying rollers start to pull the non-woven fabric into the reaction box.

[0018] Since there are chemical residues in the previous processing steps of spunlace non-woven fabrics, the ozone gas after bleaching is treated by the exhaust gas processor before being discharged to prevent pollution to the environment.

[0019] Specifically, the bleaching reaction box has a fiber mesh inlet, a fiber mesh outlet, an ozone inlet and an exhaust gas outlet, the ozone inlet is connected to the gas storage device, the exhaust gas outlet is connected to the exhaust gas processor, and between the fiber mesh inlet and the fiber mesh outlet, several groups of conveying rollers are arranged in sequence along the fiber mesh conveying direction.

[0020] Based on the above technical solution, the spunlace nonwoven fabric can be transported in the bleaching reaction box while being bleached, thereby realizing a continuous production process of the pure cotton spunlace nonwoven fabric.

[0021] Further:

[0022] The ozone bleaching mechanism has a controller;

[0023] The gas storage device comprises a plurality of gas storage tanks arranged in parallel, the inlet and outlet of each gas storage tank are respectively provided with an electric control valve, and each gas storage tank is provided with a gas pressure detector;

[0024] The controller is electrically connected to the air compressor, each of the air pressure detectors and each of the electric control valves.

[0025] Based on the above technical solution, when the air pressure detector in the gas tank detects that the air pressure is too low, the ozone generator starts to generate ozone and transports it to the gas tank. When the air pressure detector detects that the air pressure is too high, the ozone generated by the ozone generator is transported to another group of gas tanks. When the air pressure in all gas tanks reaches the preset air pressure value, the ozone generator stops working.

[0026] Further:

[0027] A light sensor is arranged at the fiber net inlet of the bleaching reaction box;

[0028] An ozone sensor is arranged in the bleaching reaction box;

[0029] Each of the gas storage tanks has a compression pump;

[0030] The light sensor, the ozone sensor, each of the conveying rollers and each of the compression pumps are electrically connected to the controller respectively.

[0031] In the above technical solution:

[0032] When the light sensor of the bleaching reaction box detects the entry of the spunlace nonwoven fabric, the compression pump of the gas storage tank is started synchronously to transport ozone gas to the bleaching reaction box. When the ozone concentration in the bleaching reaction box reaches the preset value, the conveying roller is started to pull the nonwoven fabric into the reaction box to bleach the spunlace nonwoven fabric. The bleached spunlace nonwoven fabric enters the post-washing mechanism to remove the residual ozone in the nonwoven fabric, and then is dried by the drying mechanism and then rolled up.

[0033] The working concentration range of ozone in the bleaching reaction box is 0.15g / L-0.25g / L.

[0034] The spunlace nonwoven fabric entering the bleaching reaction box has a liquid carrying rate of about 80%.

[0035] The production of spunlace nonwoven fabrics using an ozone bleaching-based spunlace nonwoven fabric production system specifically includes the following steps:

[0036] 1) The light sensor detects that the spunlace nonwoven fabric enters the bleaching reaction box, and each of the compression pumps is started to transport ozone gas to the bleaching reaction box;

[0037] 2) the ozone sensor detects that the air pressure in the bleaching reaction box reaches a preset value, and starts each of the conveying rollers to pull the nonwoven fabric into the bleaching reaction box to bleach the spunlace nonwoven fabric;

[0038] Furthermore, in step 2), the ozone sensor detects that the air pressure in the bleaching reaction box is less than a preset value, and each of the compression pumps is started to transport ozone gas to the bleaching reaction box until the preset value is reached.

[0039] The beneficial effects of the utility model are:

[0040] 1. In the utility model, the ozone bleaching process is integrated into the spunlace nonwoven production line, which reduces the time and labor cost of bleaching after winding and then changing the rolls in the existing hydrogen peroxide bleaching;

[0041] 2. In the present invention, the time required for the ozone bleaching process of spunlace nonwoven fabrics is shorter than that of hydrogen peroxide bleaching, and the amount of water used during bleaching is reduced without causing environmental pollution;

[0042] 3. In the utility model, the spunlace nonwoven fabric enters the front winding and unwinding mechanism and the steaming and washing process after being spunlace. After the steaming and washing, the spunlace nonwoven fabric is more easily bleached by reacting with ozone, and then the nonwoven fabric enters the ozone bleaching mechanism;

[0043] 4. In the present utility model, the start and stop of the ozone bleaching device is controlled by signals transmitted by the ozone sensor, which saves labor and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a system diagram of the spunlace nonwoven fabric production system based on ozone bleaching provided by the utility model.

[0045] Figure 2 It is a schematic diagram of the structure of the ozone bleaching mechanism.

[0046] Attached Figure 1 , 2 The structures represented by the labels are listed below:

[0047] 1. Winding and unwinding mechanism, 2. Steam and water washing mechanism, 3. Ozone bleaching mechanism, 4. Water washing mechanism, 5. Drum drying mechanism, 6. Winding mechanism, 7. Ozone generator, 8. Air compressor, 9. Air storage device, 10. Bleaching reaction box, 11. Exhaust gas processor. DETAILED DESCRIPTION

[0048] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0049] Example 1

[0050] like Figure 1 As shown, the spunlace nonwoven fabric production system based on ozone bleaching includes a winding and unwinding mechanism 1, an air steam washing mechanism 2, an ozone bleaching mechanism 3, a washing mechanism 4, a drum drying mechanism 5 and a winding mechanism 6 which are sequentially arranged along the fiber web conveying direction.

[0051] Example 2

[0052] like Figure 2 As shown, the ozone bleaching mechanism 3 comprises an ozone generator 7, an air compressor 8, a gas storage device 9, a bleaching reaction box 10 and an exhaust gas processor 11 which are sequentially connected. The gas storage device 9 can be composed of a plurality of gas storage tanks arranged in parallel, each gas storage tank being provided with a compression pump.

[0053] Example 3

[0054] On the basis of Example 2, the bleaching reaction box 10 has a fiber mesh inlet, a fiber mesh outlet, an ozone inlet and an exhaust gas outlet, the ozone inlet is connected to the gas storage device 9, the exhaust gas outlet is connected to the exhaust gas processor 11, and between the fiber mesh inlet and the fiber mesh outlet, several groups of conveying rollers are arranged in sequence along the fiber mesh conveying direction.

[0055] Example 4

[0056] On the basis of embodiments 2 and 3, the ozone bleaching mechanism 3 is provided with a controller. The inlet and outlet of each gas storage tank are respectively provided with an electric control valve, and each gas storage tank is provided with an air pressure detector. The controller is electrically connected to the air compressor 8, each air pressure detector and each electric control valve.

[0057] Example 5

[0058] On the basis of Examples 2, 3 and 4, a light sensor is provided at the fiber web inlet of the bleaching reaction box 10. An ozone sensor is provided in the bleaching reaction box 10. The light sensor, the ozone sensor, each conveying roller and each compression pump are electrically connected to the controller respectively.

[0059] Example 6

[0060] The production of spunlace nonwoven fabrics using the ozone bleaching-based spunlace nonwoven fabric production system of Example 5 includes the following steps:

[0061] 1) The light sensor detects that the spunlace nonwoven fabric enters the bleaching reaction box 10, and the controller controls each compression pump to start and deliver ozone gas to the bleaching reaction box 10;

[0062] 2) The ozone sensor detects that the air pressure in the bleaching reaction box 10 reaches a preset value, and the controller starts each conveying roller to pull the nonwoven fabric into the bleaching reaction box 10 to bleach the spunlace nonwoven fabric;

[0063] 3) The ozone sensor detects that the air pressure in the bleaching reaction box 10 is less than a preset value, and the controller controls each compression pump to start and transport ozone gas to the bleaching reaction box 10 until it reaches the preset value.

[0064] Effect example

[0065] In a specific implementation process, spunlace nonwoven fabrics are produced using a spunlace nonwoven fabric production system based on ozone bleaching. The ozone concentration in the bleaching reaction box is about 0.2 g / L, the liquid carrying rate of the spunlace nonwoven fabric entering the bleaching reaction box is 80%, and the treatment time of the spunlace nonwoven fabric in the bleaching reaction box is 20 minutes. After leaving the bleaching reaction box, the whiteness of the spunlace nonwoven fabric reaches 89.3.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spunlace nonwoven fabric production system based on ozone bleaching, characterized in that: It comprises a reeling and unreeling mechanism (1), an air steam washing mechanism (2), an ozone bleaching mechanism (3), a washing mechanism (4), a drum drying mechanism (5) and a reeling mechanism (6) which are sequentially arranged along the conveying direction of the fiber web.

2. The spunlace nonwoven fabric production system based on ozone bleaching according to claim 1, characterized in that: The ozone bleaching mechanism (3) comprises an ozone generator (7), an air compressor (8), an air storage device (9), a bleaching reaction box (10) and an exhaust gas processor (11) which are sequentially connected.

3. The spunlace nonwoven fabric production system based on ozone bleaching according to claim 2, characterized in that: The bleaching reaction box (10) has a fiber mesh inlet, a fiber mesh outlet, an ozone inlet and an exhaust gas outlet, the ozone inlet is connected to the gas storage device (9), the exhaust gas outlet is connected to the exhaust gas processor (11), and between the fiber mesh inlet and the fiber mesh outlet, a plurality of groups of conveying rollers are sequentially arranged along the fiber mesh conveying direction.

4. The spunlace nonwoven fabric production system based on ozone bleaching according to claim 3, characterized in that: The ozone bleaching mechanism (3) has a controller; The gas storage device (9) comprises a plurality of gas storage tanks arranged in parallel, the inlet and outlet of each gas storage tank are respectively provided with an electric control valve, and each gas storage tank is provided with a gas pressure detector; The controller is electrically connected to the air compressor (8), each of the air pressure detectors and each of the electric control valves.

5. The spunlace nonwoven fabric production system based on ozone bleaching according to claim 4, characterized in that: A light sensor is arranged at the fiber net inlet of the bleaching reaction box (10); An ozone sensor is arranged in the bleaching reaction box (10); Each of the gas storage tanks has a compression pump; The light sensor, the ozone sensor, each of the conveying rollers and each of the compression pumps are electrically connected to the controller respectively.

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