Preparation device of indigo dyeing BC reducing solution

Abstract

The utility model relates to a preparation device of an indigo dyeing BC reducing solution. The device comprises a material melting barrel, a powder pushing machine, a water softening end and a liquid alkali end, and is characterized by further comprising a relay barrel, a liquid inlet is formed in the upper end of the relay barrel and communicated with a first liquid outlet of the material melting barrel, a liquid level meter is arranged in the relay barrel, a second liquid outlet and a second drain outlet are formed in the lower end of the relay barrel, and the second drain outlet is communicated with the second liquid outlet. According to the utility model, a'small-amount and multiple-time 'material melting mode is adopted, so that the effect of immediately melting and immediately using is achieved, and the'fresh' use of BC liquid is effectively realized. The chemical material amount each time is controlled to be used up within one hour, so that the hydrolysis loss of the sodium hydrosulfite is reduced, and the stable dyeing control is facilitated. And on-line automatic adjustment and use are realized, and no other manual intervention is needed in the process as long as raw material supply is ensured. Formula setting and conversion are flexible, rapid replacement of new and old BC liquid can be achieved, and dyeing parameters can be adjusted in time. The consumption is more accurate, material melting according to plans is facilitated, and the loss of redundant materials is reduced.

Description

Technical Field

[0001] The utility model relates to a device for preparing indigo dyeing BC reducing solution. Background Art

[0002] The indigo dyeing process for denim is influenced by numerous factors, including indigo concentration, mother liquor stability, dye liquor temperature, and conductivity. The most prominent factors are the dye liquor's ORP and pH. Professionals in this field are familiar with the importance of controlling these two parameters and their impact on color. Therefore, they perform specific tests to promptly identify deviations and make appropriate operational adjustments.

[0003] A relatively common practice is to add sodium hypochlorite and lye in a quantitative manner into the circulation system, but there are also some differences in the methods of addition: some manufacturers use a powder pusher to push sodium hypochlorite into the dyeing system in a quantitative manner. The advantage of this is that it is relatively simple and intuitive, and it is convenient to calculate the dosage and make adjustments (lye is also added to the system separately); the disadvantage is that there is a problem of insufficient dissolution of sodium hypochlorite. Since feeding and production are completed at the same time, some sodium hypochlorite that is not fully dissolved will be directly carried away by the dyed yarn, which cannot achieve the best reduction effect. At the same time, it will also increase the number of particulate matter in the dye solution, which will have an adverse effect on the dyeing system.

[0004] Another approach involves dissolving sodium hydrosulfite and liquid caustic soda (BC solution), a mixture containing over 300 liters of dissolved solids before use. This solution typically lasts for over five hours. Comparative testing of BC solution stability reveals that after two hours, the chemical composition (free sodium hydrosulfite and ORP value) in the solution begins to decline over time, leading to a significant change in the dyeing system. While this approach addresses the sodium hydrosulfite solubility issue, it compromises dyeing control and can lead to losses due to hydrolysis of dyes. Other application methods exist, which are not listed here, but none of these address the common issues they share. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a preparation device for indigo dyeing BC reducing solution, which adopts the method of using BC solution immediately after dissolving to solve the problems encountered in production, so as to fully dissolve the sodium hypochlorite in the BC solution, quickly and efficiently meet the process conditions of dyeing production, and reduce the waste of dyes and chemicals caused by hydrolysis.

[0006] The utility model adopts the following technical solutions:

[0007] The utility model comprises a chemical material barrel, a powder pusher, a soft water end and a liquid alkali end, wherein the upper end of the chemical material barrel is respectively provided with a powder inlet, a soft water inlet and a liquid alkali inlet, the output end of the powder pusher is connected to the powder inlet, the soft water pipe output end of the soft water end is connected to the soft water inlet, the liquid alkali pipe output end of the liquid alkali end is connected to the liquid alkali inlet, the lower end of the chemical material barrel is provided with a first sewage outlet and a first liquid outlet, and an agitator is provided in the chemical material barrel;

[0008] It is characterized in that it also includes a relay barrel, the upper end of the relay barrel is provided with a liquid inlet, the liquid inlet is connected to the first liquid outlet of the chemical barrel, a liquid level meter is provided inside the relay barrel, and the lower end of the relay barrel is provided with a second liquid outlet and a second sewage outlet.

[0009] The soft water pipe is provided with a first manual valve, a first flow meter and a first pneumatic valve, and the liquid alkali pipe is provided with a second manual valve, a second flow meter and a second pneumatic valve.

[0010] The positive effects of this utility model are as follows:

[0011] ① Use the “small amount and multiple times” dissolving method to achieve the effect of immediate use, effectively ensuring the “freshness” of BC liquid.

[0012] ② The amount of chemical should be controlled to be used up within 1 hour each time, which will reduce the loss of hydrolysis of hydrosulfite and be more conducive to stable dyeing control.

[0013] ③ Online automatic adjustment and use, as long as the raw material supply is guaranteed, no other manual intervention is required.

[0014] ④ The formula setting and change are flexible, and the old BC solution can be quickly replaced with the new one, which is conducive to timely adjustment of dyeing parameters.

[0015] ⑤ The dosage is more accurate, which is conducive to material preparation according to plan and reduces the loss of excess materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attachment Figure 1 This is a schematic structural diagram of the utility model. DETAILED DESCRIPTION

[0017] As attached Figure 1 As shown, the utility model includes a chemical material barrel 1, a powder pusher 3, a soft water end and a liquid alkali end. The upper end of the chemical material barrel 1 is respectively provided with a powder inlet, a soft water inlet and a liquid alkali inlet. The output end of the powder pusher 3 is connected to the powder inlet, the output end of the soft water pipe 4 of the soft water end is connected to the soft water inlet, and the output end of the liquid alkali pipe 8 of the liquid alkali end is connected to the liquid alkali inlet. The lower end of the chemical material barrel 1 is provided with a first sewage outlet 17 and a first liquid outlet 12, and an agitator 18 is provided in the chemical material barrel 1.

[0018] It is characterized in that it also includes a relay barrel 2, the upper end of the relay barrel 2 is provided with a liquid inlet 13, the liquid inlet 13 is connected to the first liquid outlet 12 of the chemical barrel 1, a liquid level meter 14 is provided inside the relay barrel 2, and the lower end of the relay barrel 2 is provided with a second liquid outlet 15 and a second sewage outlet 16.

[0019] The soft water pipe 4 is provided with a first manual valve 5 , a first flow meter 6 and a first pneumatic valve 7 , and the liquid alkali pipe 8 is provided with a second manual valve 9 , a second flow meter 10 and a second pneumatic valve 11 .

[0020] The structure of the machine and the functions of each component:

[0021] ①80-liter capacity barrel (Φ450*H500, with sewage outlet): 2, one for chemical barrel and one for relay barrel, installed at high and low positions.

[0022] ② Powder pusher (including matching frequency conversion motor): 1 unit, the maximum pushing amount of insurance powder is required to be 1000g / min, installed on the edge of the chemical barrel, used for quantitative feeding of chemical barrel.

[0023] ③Soft water pipeline and liquid alkali pipeline (equipped with pneumatic valve and manual valve control): 1 set each, used to supply water and alkali to the chemical barrel.

[0024] ④ Mechanical agitator (including supporting drive motor): 1 set, used for stirring and dissolving materials.

[0025] ⑤ Flowmeters: 2, installed on the soft water pipe and the liquid alkali pipe, for material metering control. (Or level meter: 1, installed inside the chemical tank, for liquid level metering control.) Flowmeters are used for metering control in this case.

[0026] ⑥Liquid outlet pipe (equipped with pneumatic valve and manual valve control): 1 set, installed at the bottom of the chemical barrel, flowing to the relay barrel.

[0027] ⑦Liquid level controller (or liquid level gauge): 1, installed inside the relay barrel, used for signal transmission when the liquid level is specified.

[0028] ⑧Liquid supply pipe (equipped with manual valve): 1 piece, installed at the bottom of the relay barrel, used to supply materials to the machine.

[0029] ⑨Supporting electrical components (PLC, inverter, touch screen, etc.): 1 set, used for recipe editing, storage and process drive of material operation.

[0030] ⑩ Automatic control program: 1 set, used to execute chemical instructions and automatically meet the material needs of the machine. The program stores the proportions of different chemical formulas separately, and the program adopts commercially available technology.

[0031] The utility model adopts the following steps:

[0032] 1. First, maintain the chemical formula and store it in the system chip for the program to execute specific instructions.

[0033] 2. Before starting the program, all automatic valves in the system are in the closed state. You only need to open the manual valves on the soft water pipe and liquid alkali pipe.

[0034] 3. Select the required formula and start the program, and automatically perform operations according to the chemical formula and logical instructions:

[0035] ① First, open the automatic valve of the soft water pipeline, add the set amount of soft water into the chemical barrel, and then close it immediately;

[0036] ② Automatically open the liquid alkali pneumatic valve, and then add the set amount of liquid alkali into the chemical barrel and close it immediately;

[0037] ③Automatically start the mechanical stirrer;

[0038] ④ The powder pusher starts to work automatically. The amount of insurance powder added is calculated according to the amount pushed in at the rated frequency, and the machine stops working automatically after the specified time is reached.

[0039] ⑤ Continue stirring with the stirrer and stop after 8 minutes (until the hydrosulfite is fully dissolved);

[0040] ⑥ When used for the first time (or the relay tank is empty), the manual valves of the liquid outlet pipe and the liquid supply pipe should be in the closed state. After the stirring stops, the manual valve of the liquid outlet pipe can be opened (there is no need to operate the valve again after the first use until the machine is turned off). At this time, the BC liquid in the chemical tank begins to flow into the relay tank until the chemical tank is emptied, and the pneumatic valve of the liquid outlet pipe is automatically closed.

[0041] ⑦ When the machine is in use, just open the valve of the liquid supply pipe and the quantitative equipment will replenish the liquid into the machine circulation tank for use.

[0042] ⑧When the liquid level in the relay tank reaches point A, the material dispensing instruction is started again and the last material dispensing process is repeated.

[0043] ⑨ When the liquid level in the relay tank reaches point B (this time should exceed one chemical reaction cycle, at which time the chemical reaction tank has completed chemical reaction and is in standby state), the system automatically opens the pneumatic valve of the liquid outlet pipe again, and the BC liquid flows from the chemical reaction tank into the relay tank again. After the flow is completed, the pneumatic valve of the liquid outlet pipe is automatically closed.

[0044] ⑩The system automatically repeats the above steps to complete all chemical processing work.

[0045] Note: When the BC liquid formula needs to be adjusted, you can directly maintain or call the new formula and run it again. The existing BC liquid can be manually processed according to the situation. It is flexible and convenient, with less waste, and does not affect the normal production of the machine.

Claims

1. A device for preparing indigo dyeing BC reducing liquid, comprising a material barrel (1), a powder pusher (3), a soft water end and a liquid alkali end, wherein the upper end of the material barrel (1) is respectively provided with a powder inlet, a soft water inlet and a liquid alkali inlet, the output end of the powder pusher (3) is connected to the powder inlet, the output end of the soft water pipe (4) of the soft water end is connected to the soft water inlet, the output end of the liquid alkali pipe (8) of the liquid alkali end is connected to the liquid alkali inlet, the lower end of the material barrel (1) is provided with a first sewage outlet (17) and a first liquid outlet (12), and an agitator (18) is provided in the material barrel (1); It is characterized by The relay barrel (2) further comprises a liquid inlet (13) provided at the upper end of the relay barrel (2), the liquid inlet (13) being connected to the first liquid outlet (12) of the chemical barrel (1), a liquid level gauge (14) being provided inside the relay barrel (2), and a second liquid outlet (15) and a second sewage outlet (16) being provided at the lower end of the relay barrel (2). The soft water pipe (4) is provided with a first manual valve (5), a first flow meter (6) and a first pneumatic valve (7), and the liquid alkali pipe (8) is provided with a second manual valve (9), a second flow meter (10) and a second pneumatic valve (11).

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