CN219335168U - Device for improving material washing efficiency - Google Patents
Device for improving material washing efficiency Download PDFInfo
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- CN219335168U CN219335168U CN202223428726.4U CN202223428726U CN219335168U CN 219335168 U CN219335168 U CN 219335168U CN 202223428726 U CN202223428726 U CN 202223428726U CN 219335168 U CN219335168 U CN 219335168U
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Abstract
The utility model discloses a device for improving material washing efficiency, which comprises a reaction kettle, an ageing tank, a washing machine, a batch mixing tank, a mother liquor tank, a washing water tank and an automatic control system, wherein the reaction kettle, the ageing tank and the washing machine are respectively connected through pipelines, the washing machine is connected with the batch mixing tank, the washing machine is respectively connected with the mother liquor tank and the washing water tank through pipelines provided with a timer, the washing machine is provided with an alarm, and the timer and the alarm are electrically connected with the automatic control system. The improvement method adopting the device comprises the following steps: filtering and aging the slurry in the reaction kettle, filtering again, and then entering a washing machine; the mother liquor and the washing water in the washing machine are respectively discharged into a mother liquor tank and a washing water tank, if the mother liquor discharging time and the washing water discharging time are respectively within the preset time range of the automatic control system, the alarm does not give an alarm, otherwise, the alarm is given; if the alarm gives an alarm, overhauling is carried out, otherwise, the next round of material washing is started. The utility model can improve the material yield and the washing production efficiency.
Description
Technical Field
The utility model belongs to the technical field of material washing, and particularly relates to a device for improving material washing efficiency.
Background
The ternary lithium battery becomes a main stream battery of a new energy passenger car due to the advantages of smaller volume, higher energy density, low temperature resistance, better cycle performance and the like. The performance of the precursor of the positive electrode material directly influences various performances of the positive electrode material, so that the rate performance, the energy density, the cycle life and other core electrochemical performances of the lithium battery are determined.
The positive electrode material precursor is generally obtained by a coprecipitation method, and the main process flow is as follows: preparing ternary liquid, reacting, washing, drying and calcining. The existing washing modes are mainly divided into two types, one type is that the washing mode is discharged into a slurrying tank after being washed by a filter press, and the next working procedure is carried out after slurrying; the other type is that the washing is carried out by a two-in-one washing machine, and compared with the washing mode of a filter press-pulping mode, the washing mode is different in that the washing mode and the pulping mode are directly integrated, so that the pulping time and the discharging time are saved, and meanwhile, the equipment investment and the land area are reduced. However, it has been found that both types of washing methods have a problem that the washing efficiency and yield are greatly reduced due to material leakage, which is mainly caused by the presence of large particles or other sharp-surfaced impurity particles in the slurry discharged from the reaction step, and in which the filter cloth is broken during repeated washing, and a part of the slurry is discharged from the broken portion into the waste collection tank together with the washing liquid when the washing liquid is discharged. At present, two solutions are mainly available for the problem, namely, an operator judges whether to leak materials by observing the turbidity degree of the washing liquid in the washing sight glass in the process of discharging the washing liquid; secondly, when the washing waste liquid is discharged by a certain amount, the operator deduces according to the total waste amount. With the expansion of industrial production scale and the large increase of washing equipment, the method of artificial observation obviously cannot meet the requirements; meanwhile, the collected data are usually the total amount of a plurality of devices and a plurality of machines are washed by each device, so that a large time cost and a labor cost are required to be input when abnormality is found and the machines are examined one by one, and serious hysteresis exists, so that material loss and washing efficiency are reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a device for improving the material washing efficiency.
The utility model adopts the following technical scheme:
the utility model provides a device for improving material washing efficiency, the device includes reation kettle (1), ageing groove (2), washing machine (3), batch tank (4), mother liquor groove (5), wash water groove (6), autonomous system, reation kettle (1) and ageing groove (2) are through installing the pipe connection of first filter (8), ageing groove (2) and washing machine (3) are through installing the pipe connection of second filter (10), washing machine (3) and batch tank (4) are through arranging the material piping connection, washing machine (3) and mother liquor groove (5) are through arranging mother liquor piping connection who is provided with first timer (14), washing machine (3) and wash water groove (6) are through arranging wash water piping connection that is provided with second timer (15), washing machine (3) are equipped with alarm (16), first timer (14), second timer (15), alarm (16) are all connected with autonomous system electricity.
Further, the first filter (8) and the second filter (10) are bag filters.
Further, the washing machine (3) is a washing and slurrying two-in-one washing machine; the washing machine (3) is provided with a stirring mechanism, and the washing machine (3) is connected with a container filled with compressed gas through a pipeline provided with an air inlet valve.
Further, a mechanical pump and a first valve (7) are arranged on a pipeline connecting the reaction kettle (1) and the ageing tank (2), and the first valve (7) is positioned between the reaction kettle (1) and the first filter (8).
Further, a mechanical pump and a second valve (9) are arranged on a pipeline connecting the ageing tank (2) and the washing machine (3), and the second valve (9) is positioned between the ageing tank (2) and the second filter (10).
Further, a mechanical pump and a third valve (11) are arranged on the discharging pipeline, a mechanical pump and a fourth valve (12) are arranged on the mother liquor discharging pipeline, and a mechanical pump and a fifth valve (13) are arranged on the water discharging pipeline.
Further, the automatic control system comprises a pressure sensor unit and a PLC control unit, wherein the first timer (14) and the second timer (15) are respectively and electrically connected with the pressure sensor unit, the pressure sensor unit is used for collecting water pressure signals and converting the water pressure signals into electric signals, the PLC control unit is electrically connected with the alarm (16), and the PLC control unit is used for judging time conditions and outputting electric signal commands to the alarm (16).
An improvement method based on the device for improving the material washing efficiency comprises the following steps:
step (1): opening a first valve (7), filtering slurry in the reaction kettle by a first filter (8), discharging the filtered slurry into an ageing tank (2), and closing the first valve (7);
step (II): ageing the slurry in the ageing tank (2) to obtain ageing slurry; opening the second valve (9), closing the third valve (11), the fourth valve (12) and the fifth valve (13), filtering the aged slurry through the second filter (10), then entering the washing machine (3), and closing the second valve (9);
step (III): setting a preset time range for draining mother liquor and a preset time range for draining water in an automatic control system;
step (IV): after a stirring mechanism of the washing machine (3) is started to stir, an air inlet valve, a fourth valve (12) and a first timer (14) are opened, after mother liquor in the washing machine (3) is discharged to a mother liquor tank (5), the air inlet valve, the fourth valve (12) and the first timer (14) are closed, and the mother liquor discharge time is fed back to an automatic control system;
step (five): washing the materials after mother liquor is discharged from the washing machine (3), starting a fifth valve (13) and a second timer (15), closing the fifth valve (13) and the second timer (15) after washing water in the washing machine (3) is discharged to the washing water tank (6), and feeding the time of the discharged washing water back to the automatic control system;
step (six): if the mother liquor draining time is within the mother liquor draining preset time range and the water draining time is within the water draining preset time range, the alarm (16) does not give an alarm, otherwise, the alarm (16) gives an alarm;
step (seven): and opening a third valve (11), discharging the materials after washing water is discharged from the washing machine (3) into the batch mixing tank (4), overhauling the first filter (8), the second filter (10) and the filter screen of the washing machine (3) if an alarm (16) gives an alarm, and starting the next round of material washing if the alarm (16) does not give an alarm.
Further, the slurry in the reaction kettle in the step (I) is filtered by a first filter (8) and then discharged into an ageing tank (2), and when the volume of the slurry reaches 3/5-4/5 of the volume of the ageing tank (2), a first valve (7) is closed; aging the slurry in the aging tank (2) for 1.5-2 hours to obtain aged slurry; and (2) filtering the aged slurry in the step (II) through a second filter (10), then entering a washing machine (3), and closing a second valve (9) when the volume of the aged slurry reaches 3/4-4/5 of the volume of the washing machine (3).
Further, the predetermined time range of mother liquor drainage in the step (III) is 60-70 min, and the predetermined time range of water drainage is 60-70 min; in the fifth step, dilute alkali and hot water are added into the washing machine (3) to wash the materials after the mother liquor is discharged from the washing machine (3), and the washing time is 45min-60min.
The beneficial technical effects of the utility model are as follows: in the washing process of the process for producing the anode material precursor by the coprecipitation method, larger particles or other sharp impurity particles on the surface in the reaction slurry are scratched in the repeated washing process, and the filter cloth is not found or delayed in time, so that part of the slurry is discharged along with the washing liquid from the damaged part of the filter cloth when the washing liquid is discharged, thereby causing material loss, affecting the washing efficiency and reducing the yield; and along with the expansion of production scale and the great increase of washing equipment, the time cost and the labor cost which are required to be higher for checking equipment leakage by manually observing the washing sight glass are increased, the problem of serious hysteresis exists, and the production efficiency is also reduced.
The utility model adopts the material-receiving link to control: the material inlet end is mainly provided with a filter at the material outlet of the reaction kettle and the ageing tank, so that large-particle materials and impurities in the slurry are intercepted, and acid is regularly fed to clean a filter screen for acid dissolution of the impurities; the utility model sets a timing alarm self-control facility, a central control room sets a range for liquid discharge time according to different washing processes, a timer is arranged at a discharge port of a washing machine to monitor the liquid discharge time of washing liquid, the liquid discharge time is automatically fed back to the central control room, a system judges the actual liquid discharge time, if the time exceeds the preset range, an alarm is sounded, and after the material of the machine is discharged and the bottom is cleaned, the filter cloth is overhauled. According to the utility model, the filter screen is arranged at the discharging end of the reaction kettle, so that the large-particle materials and impurities are controlled to enter the washing procedure from the material receiving link, and the risk of breakage of filter cloth of washing equipment is greatly reduced; the utility model uses the timing alarm facility to feed back the waste liquid discharge time of the washing equipment in real time, and can find the material leakage condition of the washing equipment in time, thereby checking and repairing the equipment in the shortest time, greatly reducing the material loss and improving the material yield and the washing production efficiency.
Drawings
Fig. 1 is a schematic structural view of the device of the present utility model.
Detailed Description
Referring to fig. 1, the device for improving the material washing efficiency comprises a reaction kettle 1, an ageing tank 2, a washing machine 3, a batch mixing tank 4, a mother liquor tank 5, a washing water tank 6 and an automatic control system, wherein the reaction kettle 1 is connected with the ageing tank 2 through a pipeline provided with a first filter 8, the ageing tank 2 is connected with the washing machine 3 through a pipeline provided with a second filter 10, the washing machine 3 is connected with the batch mixing tank 4 through a discharge pipeline, the washing machine 3 is connected with the mother liquor tank 5 through a mother liquor discharge pipeline provided with a first timer 14, the washing machine 3 is connected with the washing water tank 6 through a washing water discharge pipeline provided with a second timer 15, the washing machine 3 is provided with an alarm 16, and the first timer 14, the second timer 15 and the alarm 16 are all electrically connected with the automatic control system.
The first filter 8 and the second filter 10 are both bag filters. The washing machine 3 is a washing and slurrying two-in-one washing machine; the washing machine 3 is provided with a stirring mechanism, and the washing machine 3 is connected with a container filled with compressed gas through a pipeline provided with an air inlet valve. The pipeline connecting the reaction kettle 1 and the ageing tank 2 is provided with a mechanical pump and a first valve 7, and the first valve 7 is positioned between the reaction kettle 1 and the first filter 8. The pipeline connecting the ageing tank 2 and the washing machine 3 is provided with a mechanical pump and a second valve 9, and the second valve 9 is positioned between the ageing tank 2 and the second filter 10. The mechanical pump and the third valve 11 are arranged on the discharging pipeline, the mechanical pump and the fourth valve 12 are arranged on the mother liquor discharging pipeline, and the mechanical pump and the fifth valve 13 are arranged on the water discharging pipeline.
The automatic control system comprises a pressure sensor unit and a PLC control unit, wherein the first timer 14 and the second timer 15 are respectively and electrically connected with the pressure sensor unit, the pressure sensor unit is used for collecting water pressure signals and converting the water pressure signals into electric signals, the PLC control unit is electrically connected with the alarm 16, and the PLC control unit is used for judging time conditions and outputting electric signal commands to the alarm 16.
The method for improving the device for improving the material washing efficiency comprises the following steps:
step (1): and (5) incoming material filtration: the first valve 7 is opened, the slurry in the reaction kettle is filtered by the first filter 8 and then discharged into the ageing tank 2, and the first valve 7 is closed. Preferably, the first valve 7 is closed when the volume of the slurry reaches 3/5-4/5 of the volume of the aging tank 2, and further when the volume of the slurry reaches 3/5, 2/3, 11/15, 4/5 of the volume of the aging tank 2.
Step (II): after the slurry in the aging tank 2 is aged, aged slurry is obtained; opening the second valve 9, closing the third valve 11, the fourth valve 12 and the fifth valve 13, filtering the aged slurry through the second filter 10, then entering the washing machine 3, and closing the second valve 9; preferably, the second valve 9 is closed when the volume of the slurry to be aged reaches 3/4-4/5 of the volume of the washer 3. Preferably, the slurry in the aging tank 2 is aged for 1.5 to 2 hours to obtain aged slurry; further, the aging time is 1.5h, 1.6h, 1.7h, 1.8h, 1.9h or 2h, mainly depending on the size of the slurry D50 of each type.
Step (III): and (3) time setting: setting a preset time range T for discharging mother liquor in an automatic control system of a central control room 1 Predetermined time range T of draining water 2 The method comprises the steps of carrying out a first treatment on the surface of the Discharging mother liquor for a predetermined time range T 1 The water is drained for a predetermined time range T from 60min to 70min 2 60min-70min.
Step (IV): discharging mother liquor: starting a stirring mechanism of the washing machine 3 to stir at the stirring frequency of 20-30r/min, starting an air inlet valve, a fourth valve 12 and a first timer 14 to discharge mother liquor after the slurry is uniformly stirred, and closing the air inlet valve, the fourth valve 12 and the first timer 14 after the mother liquor in the washing machine 3 is discharged to a mother liquor tank 5 for the mother liquor discharge time t 1 Automatically feeding back to the automatic control system.
Step (five): draining water: washing the material after the mother liquor is discharged from the washing machine 3, opening a fifth valve 13 and a second timer 15 after the washing is finished, discharging washing water, closing the fifth valve 13 and the second timer 15 after the washing water in the washing machine 3 is discharged to the washing water tank 6, and discharging the washing water for a time t 2 Automatically feeding back to an automatic control system; and adding dilute alkali and hot water into the washing machine 3 to wash the materials discharged from the washing machine 3 after mother liquor is discharged, wherein the washing time is 45-60 min.
Step (six): alarm facility feedback: if the mother liquor discharging time is within the mother liquor discharging predetermined time range T 1 And the water draining time is within a water draining preset time range T 2 In which the alarm 16 does not sound an alarm, otherwise the alarm 16 sounds an alarm. Namely: the central control room automatic control system obtains t according to reality 1 、t 2 Value and set T 1 、T 2 Judging if t is satisfied at the same time 1 ∈T 1 、t 2 ∈T 2 The alarm is not sounded; otherwise, an alarm sounds.
Step (seven): discharging and overhauling: and (3) opening the third valve 11, discharging the materials after washing water is discharged from the washing machine 3 into the batch mixing tank 4, overhauling the first filter 8, the second filter 10 and the filter screen of the washing machine 3 according to the alarm condition in the step (six) if the alarm 16 gives an alarm, and starting the next round of material washing if the alarm 16 does not give an alarm.
Example 1
And (5) incoming material filtration: the first valve 7 is opened, the slurry in the reaction kettle is filtered by the first filter 8 and then discharged into the ageing tank 2, and when the volume of the slurry reaches 4/5 of the volume of the ageing tank 2, the first valve 7 is closed.
Ageing the slurry in the ageing tank 2 for 2 hours to obtain ageing slurry; the second valve 9 is opened, the third valve 11, the fourth valve 12 and the fifth valve 13 are closed, the aged slurry is filtered by the second filter 10 and then enters the washing machine 3, and the second valve 9 is closed.
And (3) time setting: setting a preset time range T for discharging mother liquor in an automatic control system of a central control room 1 Predetermined time range T of draining water 2 The method comprises the steps of carrying out a first treatment on the surface of the Discharging mother liquor for a predetermined time range T 1 The water is drained for a predetermined time range T from 60min to 70min 2 60min-70min.
Discharging mother liquor: starting a stirring mechanism of the washing machine 3 to stir, wherein the stirring rotating speed is 30r/min, and after the slurry is uniformly stirred, starting an air inlet valve, a fourth valve 12 and a first timer14, discharging the mother liquor, closing the air inlet valve, the fourth valve 12 and the first timer 14 after the mother liquor in the washing machine 3 is discharged to the mother liquor tank 5, and discharging the mother liquor for a time t 1 For 68min, t 1 Automatically feeding back to the automatic control system.
Draining water: adding dilute alkali and hot water into the washing machine 3 to wash the materials after mother liquor is discharged from the washing machine 3 for 60min, starting a fifth valve 13 and a second timer 15 to discharge washing water after washing is finished, closing the fifth valve 13 and the second timer 15 after the washing water in the washing machine 3 is discharged to the washing water tank 6, and discharging the washing water for a time t 2 67min, t 2 Automatically feeding back to the automatic control system.
Alarm facility feedback: the central control room automatic control system obtains t according to reality 1 、t 2 Value and set T 1 、T 2 Make the judgment because t 1 ∈T 1 、t 2 ∈T 2 The alarm is not sounded.
Discharging and overhauling: the third valve 11 is opened, the material after the washing water is discharged from the washing machine 3 is discharged to the batch tank 4, and the alarm 16 does not give an alarm, so that the next round of material washing is started.
Example 2
And (5) incoming material filtration: the first valve 7 is opened, the slurry in the reaction kettle is filtered by the first filter 8 and then discharged into the ageing tank 2, and when the volume of the slurry reaches 2/3 of the volume of the ageing tank 2, the first valve 7 is closed.
Ageing the slurry in the ageing tank 2 for 1.7 hours to obtain ageing slurry; the second valve 9 is opened, the third valve 11, the fourth valve 12 and the fifth valve 13 are closed, the aged slurry is filtered by the second filter 10 and then enters the washing machine 3, and the second valve 9 is closed.
And (3) time setting: setting a preset time range T for discharging mother liquor in an automatic control system of a central control room 1 Predetermined time range T of draining water 2 The method comprises the steps of carrying out a first treatment on the surface of the Discharging mother liquor for a predetermined time range T 1 The water is drained for a predetermined time range T from 60min to 70min 2 60min-70min.
Discharging mother liquor: starting a stirring mechanism of the washing machine 3 to stir at the stirring speed of 25r/min, and starting an air inlet valve and a fourth valve after the slurry is uniformly stirredValve 12, first timer 14, discharging mother liquor, after mother liquor in washing machine 3 is discharged to mother liquor tank 5, closing air inlet valve, fourth valve 12 and first timer 14, discharging mother liquor time t 1 65min, t 1 Automatically feeding back to the automatic control system.
Draining water: adding dilute alkali and hot water into the washing machine 3 to wash the materials after mother liquor is discharged from the washing machine 3 for 50min, starting a fifth valve 13 and a second timer 15 to discharge washing water after washing is finished, closing the fifth valve 13 and the second timer 15 after the washing water in the washing machine 3 is discharged to the washing water tank 6, and discharging the washing water for a time t 2 63min, t 2 Automatically feeding back to the automatic control system.
Alarm facility feedback: the central control room automatic control system obtains t according to reality 1 、t 2 Value and set T 1 、T 2 Make the judgment because t 1 ∈T 1 、t 2 ∈T 2 The alarm is not sounded.
Discharging and overhauling: the third valve 11 is opened, the material after the washing water is discharged from the washing machine 3 is discharged to the batch tank 4, and the alarm 16 does not give an alarm, so that the next round of material washing is started.
Example 3
And (5) incoming material filtration: the first valve 7 is opened, the slurry in the reaction kettle is filtered by the first filter 8 and then discharged into the ageing tank 2, and when the volume of the slurry reaches 3/5 of the volume of the ageing tank 2, the first valve 7 is closed.
Ageing the slurry in the ageing tank 2 for 1.5 hours to obtain ageing slurry; the second valve 9 is opened, the third valve 11, the fourth valve 12 and the fifth valve 13 are closed, the aged slurry is filtered by the second filter 10 and then enters the washing machine 3, and the second valve 9 is closed.
And (3) time setting: setting a preset time range T for discharging mother liquor in an automatic control system of a central control room 1 Predetermined time range T of draining water 2 The method comprises the steps of carrying out a first treatment on the surface of the Discharging mother liquor for a predetermined time range T 1 The water is drained for a predetermined time range T from 60min to 70min 2 60min-70min.
Discharging mother liquor: starting a stirring mechanism of the washing machine 3 to stir at a stirring rotating speed of 20r/min, and stirring the slurry uniformlyOpening the air inlet valve, the fourth valve 12 and the first timer 14, discharging the mother liquor, closing the air inlet valve, the fourth valve 12 and the first timer 14 after the mother liquor in the washing machine 3 is discharged to the mother liquor tank 5, discharging the mother liquor for time t 1 61min, t 1 Automatically feeding back to the automatic control system.
Draining water: adding dilute alkali and hot water into the washing machine 3 to wash the materials after mother liquor is discharged from the washing machine 3 for 45min, starting a fifth valve 13 and a second timer 15 to discharge washing water after washing is finished, closing the fifth valve 13 and the second timer 15 after the washing water in the washing machine 3 is discharged to the washing water tank 6, and discharging the washing water for a time t 2 Is 60min, t 2 Automatically feeding back to the automatic control system.
Alarm facility feedback: the central control room automatic control system obtains t according to reality 1 、t 2 Value and set T 1 、T 2 Make the judgment because t 1 ∈T 1 、t 2 ∈T 2 The alarm is not sounded.
Discharging and overhauling: the third valve 11 is opened, the material after the washing water is discharged from the washing machine 3 is discharged to the batch tank 4, and the alarm 16 does not give an alarm, so that the next round of material washing is started.
The above-described embodiments of the disclosure are disclosed to enable any person skilled in the art to make or use the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (7)
1. The utility model provides a device for improving material washing efficiency, a serial communication port, the device includes reation kettle (1), ageing groove (2), washing machine (3), close batch groove (4), mother liquor groove (5), wash water groove (6), autonomous system, reation kettle (1) and ageing groove (2) are through installing the pipe connection of first filter (8), ageing groove (2) and washing machine (3) are through installing the pipe connection of second filter (10), washing machine (3) and close batch groove (4) are through arranging the material piping connection, washing machine (3) and mother liquor groove (5) are through being provided with the row mother liquor pipe connection of first timer (14), washing machine (3) and wash water groove (6) are through being provided with the row wash water pipe connection of second timer (15), washing machine (3) are equipped with alarm (16), first timer (14), second timer (15), alarm (16) all are connected with autonomous system electricity.
2. The device for improving the washing efficiency of materials according to claim 1, characterized in that the first filter (8) and the second filter (10) are bag filters.
3. The device for improving the material washing efficiency according to claim 1, wherein the washing machine (3) is a washing and slurrying two-in-one washing machine; the washing machine (3) is provided with a stirring mechanism, and the washing machine (3) is connected with a container filled with compressed gas through a pipeline provided with an air inlet valve.
4. The device for improving the material washing efficiency according to claim 1, wherein a mechanical pump and a first valve (7) are arranged on a pipeline connecting the reaction kettle (1) and the ageing tank (2), and the first valve (7) is positioned between the reaction kettle (1) and the first filter (8).
5. Device for improving the washing efficiency of materials according to claim 1, characterized in that the pipe connecting the ageing tank (2) with the washing machine (3) is equipped with a mechanical pump, a second valve (9), the second valve (9) being located between the ageing tank (2) and the second filter (10).
6. The device for improving the material washing efficiency according to claim 1, wherein a mechanical pump and a third valve (11) are arranged on the discharging pipeline, a mechanical pump and a fourth valve (12) are arranged on the mother liquor discharging pipeline, and a mechanical pump and a fifth valve (13) are arranged on the washing water discharging pipeline.
7. The device for improving the material washing efficiency according to claim 1, wherein the automatic control system comprises a pressure sensor unit and a PLC control unit, the first timer (14) and the second timer (15) are respectively and electrically connected with the pressure sensor unit, the pressure sensor unit is used for collecting water pressure signals and converting the water pressure signals into electric signals, the PLC control unit is electrically connected with the alarm (16), and the PLC control unit is used for judging time conditions and outputting electric signal commands to the alarm (16).
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| CN202223428726.4U CN219335168U (en) | 2022-12-21 | 2022-12-21 | Device for improving material washing efficiency |
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| CN202223428726.4U CN219335168U (en) | 2022-12-21 | 2022-12-21 | Device for improving material washing efficiency |
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