A nitrogen sealing system for reducing mother liquid of reducing dye

Abstract

The present invention discloses a nitrogen sealing system for reducing mother liquid of reducing dyes. At the beginning of material preparation, after the reagent is added, it is stirred for a short time and then pumped into a storage barrel sealed with nitrogen for reduction. After the reduction is completed, it enters the standby program. When the operator selects the type of material according to the process requirements, the system automatically determines which mother liquid storage barrel material to use and runs according to the predetermined program. When the reagent in the mother liquid storage barrel is about to run out, the system automatically replaces it. In the entire operation process, only the material punching operation and the material use operation require the intervention of the operator, and all other actions are automatically performed according to the set program, eliminating the operator's valve switching operation and cleaning operation, reducing labor intensity and material waste. Furthermore, the entire system can reduce the reducing agent consumption of the existing process by about 5%, while improving product quality and reducing employee labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of reduction storage and use of vat dyes, and in particular to a nitrogen sealing system for a reduction mother liquid of a vat dye. Background Art

[0002] In the production process of denim, during the vat dyeing process, the vat dye needs oxygen in the air when it develops color and oxidizes, that is to say, oxygen is an indispensable condition for the oxidation of vat dyeing.

[0003] The dyeing principle is that when the materials such as vat dyes or reducing auxiliaries are attached to the yarn, the vat dyes or reducing auxiliaries react with the oxygen in the air. The reaction principle is as follows:

[0004] Na2S2O4+2NaOH+O2=Na2SO3+ Na2SO4+H2O

[0005] Vat dye leuco sodium salt + water = vat dye leuco acid + caustic soda

[0006] Vat dye leuco acid + oxygen = vat dye + water

[0007] It can be deduced from the above chemical formula that currently reducing dyes or reducing auxiliaries, such as hydrosulfite, cannot be completely isolated from the air during the cutting process, reduction process, storage process, and use process, and will continue to oxidize, thereby reducing the reducing ability of the dyes or auxiliaries. As a result, in actual operations, the use or replenishment of reducing agents and caustic soda has to be continuously increased, causing unnecessary consumption of chemicals, which not only increases the dyeing cost, but also increases the difficulty and cost of subsequent sewage treatment.

[0008] N2 is chemically inactive and is often used as a protective gas to isolate the air in industry. Nitrogen is the gas with the largest volume proportion in the atmosphere. It is colorless, odorless and tasteless, and is an insoluble diatomic inert gas, accounting for about 78% of the volume of air. It is also the most widely existing gas in nature. Pure nitrogen only needs to be separated from the air. With the continuous development of science and technology, as technical personnel in this industry, we have conducted many tests and verifications, and tried to use nitrogen to completely isolate the air during the cutting process, reduction process, storage process, and use process, increase the reduction time, avoid oxidation of dyes and reducing auxiliaries, and use reasonable formulas to completely reduce dyes, reduce consumption caused by contact with oxygen reactions, reduce dyeing costs, and improve dyeing reduction stability. Summary of the invention

[0009] In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a nitrogen sealing system for reducing mother liquid of reducing dyes to solve the drawbacks of the prior art.

[0010] The technical solution adopted by the present invention to solve its technical problem is:

[0011] A nitrogen sealing system for reducing mother liquid of vat dyes, comprising a material opening barrel, the material opening barrel being connected to a plurality of mother liquid storage barrels through a pipeline, a material opening circulation pump being arranged outside the material opening barrel, a circulation loop being arranged around the material opening barrel through the material opening circulation pump and the pipeline connection; the mother liquid storage barrel being connected to a replenishing barrel through a pipeline or being connected to an external yarn dyeing equipment through an external liquid supply pump, and a hydraulic valve being arranged on each corresponding mother liquid storage barrel; a manual valve, a hydraulic valve and a one-way valve being arranged on the pipeline connecting the material opening barrel and the mother liquid storage barrel; the one-way valve being arranged from the material opening barrel toward the mother liquid storage barrel;

[0012] The top of the mother liquid storage barrel is connected to the nitrogen supply tank and the nitrogen recovery airbag through a pipeline; there are multiple nitrogen supply tanks, and a manual valve, a regulating valve and a pressure detector are arranged on the top of each nitrogen supply tank. The internal pressure of the nitrogen supply tank is displayed by a pressure gauge. A one-way valve and a hydraulic valve are also arranged on the top of each nitrogen supply tank to prevent nitrogen from flowing back into the nitrogen supply tank;

[0013] A manual valve and a pressure detector are connected to the connecting pipeline from the mother liquid storage barrel to the nitrogen supply tank, and a safety valve is arranged above the pressure detector; a pipeline is connected to the nitrogen recovery airbag between the safety valve and the manual valve, and a manual valve, a pressure detector and a pressure gauge are arranged in a container connected to the nitrogen recovery airbag.

[0014] A liquid return pipe is arranged at the bottom of each mother liquid storage barrel, and the lower part of the liquid return pipe is connected to the external liquid discharge port and the outlet of the mother liquid circulation pump through a tee, and a filtering device is arranged on the pipeline from the outlet of the mother liquid circulation pump to the liquid return pipe, and the inlet end of the mother liquid circulation pump is connected to the second liquid discharge port and the heat exchanger through a tee, and the heat exchanger is connected to the liquid return pipe on the mother liquid storage barrel.

[0015] Each mother liquid storage barrel is provided with a temperature sensing device and a liquid level display device.

[0016] When the reduced mother liquid nitrogen sealing system of the reduced dye is used, it is realized by the following control system:

[0017] ① Opening operation: the opening barrel operates according to the manually set parameters, and senses whether the opening barrel has completed the opening. If the opening is not completed, the material will not be poured into the mother liquid storage barrel; if the opening is completed, the liquid level in the mother liquid storage barrel and the liquid level usage are judged. If the mother liquid storage barrel is full or the mother liquid storage barrel is in use, the material will not be poured into the mother liquid storage barrel; if the mother liquid storage barrel is not in use, the restoration status of the mother liquid storage barrel is judged. If at least one barrel is being restored and at least one barrel has completed restoration, the opened material will be transported to the mother liquid storage barrel being restored. If all the mother liquid storage barrels have completed restoration, the opened material will be poured into the mother liquid storage barrel that has completed restoration later; if there is material in one of the mother liquid storage barrels, the material inventory in the mother liquid storage barrel is judged. If there is material and it is not full, it will be poured into the mother liquid storage barrel with material. If the mother liquid storage barrel with material is full, it will be poured into the empty barrel;

[0018] ② Nitrogen replenishment system: first set the standard nitrogen pressure in the mother liquid storage barrel, detect the pressure in the mother liquid storage barrel and compare it with the standard nitrogen pressure. If it is higher than the upper limit of the standard nitrogen pressure, stop replenishing nitrogen and discharge nitrogen to the nitrogen recovery airbag at this time. If the internal pressure of the nitrogen recovery airbag reaches the upper limit, close the valve and open the safety valve to discharge nitrogen to the outside. If the nitrogen pressure in the mother liquid storage barrel is lower than the standard nitrogen pressure, judge the recovery airbag pressure after a period of time. If the pressure is normal, open the recovery airbag pressure valve to supply pressure to the mother liquid storage barrel. After a delay, judge the pressure in the mother liquid storage barrel. If the pressure in the mother liquid storage barrel is normal, close the recovery airbag pressure valve. If it is still lower than the lower limit of the standard nitrogen pressure, select a nitrogen supply tank for replenishment. If the pressure of the selected nitrogen supply tank is standard or higher than the standard value, supply nitrogen to the mother liquid storage barrel. If the pressure in the selected nitrogen supply tank is small, select the next nitrogen supply tank to replenish the mother liquid storage barrel.

[0019] ③ Material unloading operation: The pressure in the mother liquid storage barrel operates according to the manually set parameters, and it senses whether the mother liquid storage barrel has been restored. If the restoration is not completed or the mother liquid storage barrel is empty or the mother liquid in the mother liquid storage barrel is in use, the material will not be unloaded in the direction of the replenishment barrel; if the mother liquid storage barrels are not in use, the liquid level in the mother liquid storage barrel and the liquid level usage are judged. If one of the mother liquid storage barrels is being restored and the rest have been restored, the material will be pumped into the mother liquid storage barrel that is being restored. If all the mother liquid storage barrels have been restored, the material will be pumped into the mother liquid storage barrel that has completed the restoration later; if there is material in one of the mother liquid storage barrels, the material inventory in the mother liquid storage barrel is judged. If there is material and it is not full, it is pumped into the mother liquid storage barrel with material. If the mother liquid storage barrel with material is full, it is pumped into the empty barrel.

[0020] The present invention has the following beneficial effects through the above structural arrangement and the setting of the operating system: The purpose of the present invention is to eliminate the unnecessary loss of reducing agent caused by contact with oxygen during the storage and use of reducing dyes or auxiliary agents, and to reduce unnecessary agent consumption and abnormalities in the current use process. In addition, through the system setting, at the beginning of the material opening, the agent is added and stirred for a short time before being poured into a storage barrel sealed with nitrogen for reduction. After the reduction is completed, it enters the standby program. When the operator selects the type of material according to the process requirements, the system automatically determines which mother liquor storage barrel material to use and runs according to the predetermined program. When the mother liquor storage barrel is about to run out of agent, the system automatically replaces it. During the entire operation process, only the material operation and the material operation require operator intervention, and all other actions are automatically operated according to the set program, eliminating the operator's valve switching and cleaning operations, reducing labor intensity and material waste. Furthermore, the entire system can reduce the reducing agent consumption of the existing process by about 5%, while improving product quality.

[0021] quantity, reducing the labor intensity of employees. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall assembly structure of the device of the present invention;

[0023] Figure 2 It is a schematic diagram of the connection structure of the blanking module of the device of the present invention;

[0024] Figure 3 This is a schematic diagram of the nitrogen supplementation principle of the device of the present invention;

[0025] Figure 4 This is a schematic diagram of the material feeding control principle of the device of the present invention;

[0026] Figure 5 This is a schematic diagram of the material feeding control principle of the device of the present invention;

[0027] Figure markings: 1-opening barrel, 10-opening barrel feeding port, 11-opening circulation pump, 12-tuning fork switch, 2-mother liquor storage barrel A, 21-liquid level gauge, 3-mother liquor storage barrel B, 4-nitrogen supply tank I, 5-nitrogen supply tank II, 6-nitrogen supply tank III, 51-manual valve, 52-hydraulic valve, 53-check valve, 54-three-way valve, 55-safety valve, 56-pressure detector, 57-pressure regulating valve, 58-pressure gauge, 59-temperature sensing device, 7-nitrogen recovery airbag, 8-heat exchanger, 81-external drain port, 82-mother liquor circulation pump, 83-filtering device, 84-return liquid pipeline, 85-second drain port, 9-supplementing barrel, 91-drainage pipeline, 92-external liquid supply pump. DETAILED DESCRIPTION

[0028] As attached Figure 1As shown, a nitrogen sealing system for reducing mother liquid of reducing dye comprises a material opening barrel 1, wherein the material opening barrel 1 is connected to two mother liquid storage barrels through a pipeline, and the two mother liquid storage barrels are respectively a mother liquid storage barrel A2 and a mother liquid storage barrel B3; a material opening circulation pump 11 is arranged outside the material opening barrel 1, and a circulation loop is arranged around the material opening barrel 1 through the material opening circulation pump 11 and the pipeline connection, and its purpose is to circulate the opened material inside the material opening barrel 11 to the mother liquid storage barrel; the mother liquid storage barrel A2 and the mother liquid storage barrel B3 are connected to the replenishing barrel 9 through a pipeline or are connected to the external yarn dyeing equipment through an external liquid supply pump 92, and a hydraulic valve 52 is arranged on each mother liquid storage barrel; a manual valve 51, a hydraulic valve 52 and a one-way valve 53 are arranged on the pipeline connecting the material opening barrel 1 and the mother liquid storage barrel; the one-way valve 53 is arranged from the material opening barrel 1 toward the mother liquid storage barrel;

[0029] like Figure 1 As shown, the tops of the mother liquid storage barrel A2 and the mother liquid storage barrel B3 are connected to three nitrogen supply tanks and a nitrogen recovery airbag 7 through pipelines. The nitrogen recovery airbag 7 is set with a capacity of 30 cubic meters. The three nitrogen supply tanks are connected in parallel, which are nitrogen supply tank I4, nitrogen supply tank II5, and nitrogen supply tank III6 respectively; a manual valve 51, a regulating valve 57 and a pressure detector 56 are arranged on the top of each nitrogen supply tank, and the internal pressure of each nitrogen supply tank is displayed by a pressure gauge 58. A one-way valve 53 and a hydraulic valve 52 are also arranged on the top of each nitrogen supply tank; the device realizes automatic control by switching the hydraulic valve 52, and can also realize manual adjustment under special circumstances through the manual valve 51.

[0030] Furthermore, a manual valve 51 and a pressure detector 56 are connected to the connecting pipelines from all mother liquid storage barrels to the nitrogen supply tank, and a safety valve 55 is arranged above the pressure detector 56; a pipeline is connected to the nitrogen recovery airbag 7 between the safety valve 55 and the manual valve 51, and a manual valve 51, a pressure detector 56 and a pressure gauge 58 are arranged on the pipeline connected to the nitrogen recovery airbag 7.

[0031] When this device is used, it specifically completes the operation through the following systems:

[0032] ① Cutting operation: its specific steps refer to Figure 4As shown, the material opening barrel 1 operates according to the artificially set parameters, and the tuning fork switch 12 is used to sense whether the material opening barrel 1 has completed the material opening. If the material opening has not been completed, the material will not be added to the mother liquid storage barrel. At this time, the hydraulic valve 52 and the one-way valve 53 on the pipeline connecting the material opening barrel 1 and the mother liquid storage barrel are both closed; if the material opening has been completed, the liquid level in the mother liquid storage barrel and the liquid level usage are judged by the liquid level meter 21. If the mother liquid storage barrel is full or the mother liquid storage barrel is in use, the material will not be added to the mother liquid storage barrel; if the mother liquid storage barrel is not in use, the restoration state of the mother liquid storage barrel is judged. If the mother liquid storage barrel A is 2 and mother liquid storage barrel B3 are in the restoration state, and one of them has completed restoration. Then the opened material will be transported to the mother liquid storage barrel in the restoration state. If all the mother liquid storage barrels have completed restoration, then the opened material will be pumped into the mother liquid storage barrel that has completed restoration later. The purpose of this setting is to adopt the principle of first-in-first-out, and the first restored material will be used first in actual operation. If there is material in one of the mother liquid storage barrels A2 and mother liquid storage barrel B3, the material inventory in the mother liquid storage barrel will be determined. If there is material and it is not full, then the material will be pumped into the mother liquid storage barrel with material. If the mother liquid storage barrel with material is full, then the material will be pumped into the empty barrel.

[0033] ② Nitrogen supplement system: Based on the above structural settings, such as Figure 1 and Figure 3 As shown, firstly, the standard nitrogen pressure in the mother liquid storage barrel A2 and the mother liquid storage barrel B3 is set, and the pressure in the two mother liquid storage barrels is detected and compared with the standard nitrogen pressure. If it is higher than the upper limit of the standard nitrogen pressure, the nitrogen replenishment is stopped, and the hydraulic valve 52 above all nitrogen supply tanks is controlled to be in a closed state, and nitrogen is discharged into the nitrogen recovery airbag 7 at this time. If the internal pressure of the nitrogen recovery airbag 7 reaches the upper limit, the hydraulic valve 52 above the nitrogen recovery airbag 7 is closed and the safety valve 55 is opened to discharge nitrogen to the outside;

[0034] If the nitrogen pressure in the mother liquid storage barrel is lower than the standard nitrogen pressure, the pressure of the recovery airbag 7 is determined after a period of time. If the pressure is normal, the hydraulic valve 52 on the recovery airbag 7 is opened to supply pressure to the mother liquid storage barrel. The pressure in the mother liquid storage barrel is determined after a delay. If the pressure in the mother liquid storage barrel is normal, the hydraulic valve 52 on the recovery airbag 7 is closed to stop supplying pressure. If it is still lower than the lower limit of the standard nitrogen pressure, any one of the three nitrogen supply tanks is selected for replenishment. If the pressure of the selected nitrogen supply tank is standard or higher than the standard value, nitrogen is supplied to the mother liquid storage barrel. If the pressure in the selected nitrogen supply tank is small, the next nitrogen supply tank is selected again to replenish the mother liquid storage barrel.

[0035] A manual valve 51, a hydraulic valve 52, a pressure detector 56 and a pressure gauge 58 are provided above the nitrogen supply tank and the recovery air bag 7 mentioned above. Through the above settings, the pressure of the nitrogen supply tank and the recovery air bag 7 can be displayed in real time, and manual control or automatic control can be performed through the manual valve 51 and the hydraulic valve 52.

[0036] The above arrangement enables the material to be reduced in the mother liquid storage barrel A2 and the mother liquid storage barrel B3. This reduction is carried out in a nitrogen-sealed environment. After the reduction of the material in the mother liquid storage barrel A2 and the mother liquid storage barrel B3 is completed, the material is transported outwards through the unloading operation. The specific steps are as follows: Figure 2 and Figure 5 As shown:

[0037] ③ Unloading operation: The pressure in the mother liquid storage barrel A2 and the mother liquid storage barrel B3 operates according to the manually set parameters, and the mother liquid storage barrel A2 and the mother liquid storage barrel B3 are sensed or calculated through time to see whether the reduction is completed. If the reduction is not completed or the mother liquid storage barrel is empty or the mother liquid in the mother liquid storage barrel is in use, the material will not be unloaded in the direction of the replenishment barrel 9; if the mother liquid storage barrels are not in use, the liquid level in the mother liquid storage barrel and the liquid level usage are judged. If one barrel of the mother liquid storage barrel is being reduced and the rest have been reduced, the material will be unloaded in the direction of the replenishment barrel 9, or it will be temporarily stored and used in the replenishment barrel 9, or the material will be transported outward through the external liquid supply pump 92 and the drainage pipe 91.

[0038] Furthermore, as attached Figure 1 As shown, a liquid return pipe 84 is provided at the bottom of each mother liquid storage barrel, and the lower part of the liquid return pipe 84 is connected to the external liquid discharge port 81 and the outlet of the mother liquid circulation pump 82 through a three-way valve 54. A filtering device 83 is provided on the pipeline from the outlet of the mother liquid circulation pump 82 to the liquid return pipe 84 to filter the circulating mother liquid. The inlet end of the mother liquid circulation pump 82 is connected to the second liquid discharge port 85 and the heat exchanger 8 through the three-way valve 54. The heat exchanger 8 is connected to the liquid return pipe on the mother liquid storage barrel. Through the above structural arrangement, the circulation of the material inside the mother liquid storage barrel can be realized, and the circulation can realize the external regulation of its high and low temperatures.

[0039] Furthermore, each of the mother liquid storage barrels is provided with a temperature sensing device 59 and a liquid level display device 21, which can monitor the liquid level and temperature inside the mother liquid storage barrel at all times.

[0040] Summary: The purpose of the present invention is to eliminate the unnecessary loss of reducing agent caused by contact with oxygen during storage and use of reducing dyes or auxiliaries, and to reduce unnecessary agent consumption and abnormalities in the current use process. In addition, through system settings, at the beginning of the material opening, the agent is added and stirred for a short time before being poured into a storage barrel sealed with nitrogen for reduction. After the reduction is completed, it enters the standby program. When the operator selects the type of material according to the process requirements, the system automatically determines which mother liquid storage barrel material to use and runs according to the predetermined program. When the mother liquid storage barrel agent is about to run out, the system automatically replaces it. The present invention does not disclose the control circuit components and control procedures, but any personnel in the automation control industry can perform automatic control connection of the equipment through the control method steps described above; during the entire operation process, only the material operation and the material operation require operator intervention, and all other actions are automatically operated according to the set program, eliminating the operator's valve switching operation and cleaning operation, reducing labor intensity and material waste. Furthermore, the entire system can reduce the consumption of reducing agents in the existing process by about 5%, while improving product quality and reducing employee labor intensity.

Claims

1. A nitrogen sealing system for reducing mother liquid of vat dyes, characterized in that: It includes a material opening barrel, which is connected to a plurality of mother liquid storage barrels through pipelines, a material opening circulation pump is arranged outside the material opening barrel, and a circulation loop is arranged around the material opening barrel through the material opening circulation pump and the pipeline connection; the mother liquid storage barrel is connected to a supplement barrel through a pipeline or is connected to an external yarn dyeing equipment through an external liquid supply pump, and a hydraulic valve is arranged on each mother liquid storage barrel; a manual valve, a hydraulic valve and a one-way valve are arranged on the pipeline connecting the material opening barrel and the mother liquid storage barrel; the one-way valve is arranged from the material opening barrel toward the mother liquid storage barrel; The top of the mother liquid storage barrel is connected to the nitrogen supply tank and the nitrogen recovery airbag through a pipeline; there are multiple nitrogen supply tanks, and a manual valve, a regulating valve and a pressure detector are arranged on the top of each nitrogen supply tank. The internal pressure of the nitrogen supply tank is displayed by a pressure gauge. A one-way valve and a hydraulic valve are also arranged on the top of each nitrogen supply tank to prevent nitrogen from flowing back into the nitrogen supply tank; A manual valve and a pressure detector are connected to the connecting pipeline from the mother liquid storage barrel to the nitrogen supply tank, and a safety valve is arranged above the pressure detector; the safety valve and the manual valve are connected to the nitrogen recovery airbag through a pipeline, and a manual valve, a pressure detector and a pressure gauge are arranged in the container connected to the nitrogen recovery airbag; a return liquid pipeline is arranged at the bottom of each mother liquid storage barrel, and the bottom of the return liquid pipeline is connected to the external drain port and the outlet of the mother liquid circulation pump through a tee, and a filtering device is arranged on the pipeline from the outlet of the mother liquid circulation pump to the return liquid pipeline, and the inlet end of the mother liquid circulation pump is connected to the second drain port and the heat exchanger through a tee, and the heat exchanger is connected to the return liquid pipeline on the mother liquid storage barrel; each mother liquid storage barrel is provided with a temperature sensing device and a liquid level display device.

2. The nitrogen sealing system for reducing mother liquid of reducing dye according to claim 1 is realized by the following control system: characterized in that: ① Opening operation: the opening barrel operates according to the set parameters, and senses whether the opening barrel has completed the opening. If the opening is not completed, the material will not be poured into the mother liquid storage barrel; if the opening is completed, the liquid level in the mother liquid storage barrel and the liquid level usage are judged. If the mother liquid storage barrel is full or the mother liquid storage barrel is in use, the material will not be poured into the mother liquid storage barrel; if the mother liquid storage barrel is not in use, the restoration status of the mother liquid storage barrel is judged. If at least one barrel is being restored and at least one barrel has completed restoration, the opened material will be transported to the mother liquid storage barrel being restored. If all the mother liquid storage barrels have completed restoration, the opened material will be poured into the mother liquid storage barrel that has completed restoration later; if there is material in one of the mother liquid storage barrels, the material inventory in the mother liquid storage barrel is judged. If there is material and it is not full, it will be poured into the mother liquid storage barrel with material. If the mother liquid storage barrel with material is full, it will be poured into the empty barrel; ② Nitrogen replenishment system: first set the standard nitrogen pressure in the mother liquid storage barrel, detect the pressure in the mother liquid storage barrel and compare it with the standard nitrogen pressure. If it is higher than the upper limit of the standard nitrogen pressure, stop replenishing nitrogen and discharge nitrogen to the nitrogen recovery airbag at this time. If the internal pressure of the nitrogen recovery airbag reaches the upper limit, close the valve and open the safety valve to discharge nitrogen to the outside. If the nitrogen pressure in the mother liquid storage barrel is lower than the standard nitrogen pressure, judge the recovery airbag pressure after a period of time. If the pressure is normal, open the recovery airbag pressure valve to supply pressure to the mother liquid storage barrel. After a delay, judge the pressure in the mother liquid storage barrel. If the pressure in the mother liquid storage barrel is normal, close the recovery airbag pressure valve. If it is still lower than the lower limit of the standard nitrogen pressure, select a nitrogen supply tank for replenishment. If the pressure of the selected nitrogen supply tank is standard or higher than the standard value, supply nitrogen to the mother liquid storage barrel. If the pressure in the selected nitrogen supply tank is small, select the next nitrogen supply tank to replenish the mother liquid storage barrel. ③ Material unloading operation: The pressure in the mother liquid storage barrel operates according to the manually set parameters, and it senses whether the mother liquid storage barrel has been restored. If the restoration is not completed or the mother liquid storage barrel is empty or the mother liquid in the mother liquid storage barrel is in use, the material will not be unloaded in the direction of the replenishment barrel; if the mother liquid storage barrels are not in use, the liquid level in the mother liquid storage barrel and the liquid level usage are judged. If one of the mother liquid storage barrels is being restored and the rest have been restored, the material will be pumped into the mother liquid storage barrel that is being restored. If all the mother liquid storage barrels have been restored, the material will be pumped into the mother liquid storage barrel that has completed the restoration later; if there is material in one of the mother liquid storage barrels, the material inventory in the mother liquid storage barrel is judged. If there is material and it is not full, it is pumped into the mother liquid storage barrel with material. If the mother liquid storage barrel with material is full, it is pumped into the empty barrel.

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