Automatic salt discharging device

Abstract

The utility model provides an automatic salt discharging device. The device comprises an evaporation crystallizer internally provided with a concentration monitor, a material transfer pump connected with the evaporation crystallizer through a first pipeline, a thickener connected with the material transfer pump through a second pipeline, a centrifugal drying unit connected with the thickener through a third pipeline, and a packaging unit for packaging dried materials, a first reflux valve is arranged on the first reflux pipeline between the second pipeline and the evaporation crystallizer; a first discharging valve and a material transferring pump on the first pipeline are opened, and when the concentration of materials in the evaporation crystallizer reaches the preset concentration, a first adjusting valve on the second pipeline is triggered to be opened to a first preset opening degree; and when a target parameter detected by a detection stirring execution unit on the thickener meets a first preset condition, the first adjusting valve is triggered to adjust the opening degree, and the first backflow valve is triggered to be opened. The automatic salt discharging device provided by the utility model can automatically control dehydration, drying and packaging of industrial salt, so that frequent operation of field personnel is reduced, and the working efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical product production, and particularly relates to an automatic salt discharging device. Background Art

[0002] In the high-salt wastewater treatment industry, the commonly adopted treatment method is evaporation crystallization operation, and single-effect, multi-effect or MVR evaporation are common evaporation crystallization methods. By using an external heat source to heat and evaporate and concentrate the incoming wastewater to reach the saturation concentration of the material, and continuing to evaporate and concentrate to reach supersaturation, crystals (i.e., salt) will precipitate. According to the different dissolution properties of different materials, cold crystallization method or hot crystallization method may be adopted. After crystallization, it is necessary to centrifugally separate the salt and the mother liquor. The salt discharging system is located at the end of the entire evaporation crystallization process equipment. If the salt discharging system malfunctions, it will seriously affect the normal operation of the entire evaporation crystallization process equipment and even lead to shutdown and production suspension.

[0003] Currently, in the production of zero-emission industrial salt, evaporation crystallization, dehydration, drying and other links mainly rely on on-site operation, and these links face multiple challenges. These include a large number of control parameters that need to be monitored and adjusted, insufficient on-site operators, high-temperature and noisy working environments, easy blockage of pipelines, scattered operation points, and high labor intensity. These problems have brought great troubles to the salt extraction link of zero-emission industrial salt. Content of the Utility Model

[0004] The purpose of the utility model is to provide an automatic salt discharging device to solve one or more of the problems existing in the prior art, such as a large number of control parameters involved in the production of zero-emission industrial salt, insufficient on-site operator configuration, high-temperature and noisy working environments, easy blockage of pipelines, scattered operation points, and high labor intensity.

[0005] To achieve the above object, the present utility model is realized through the following technical solutions: An automatic salt discharging device, comprising: an evaporation crystallizer, a transfer pump, a thickener, a centrifugal drying unit, and a packing unit; the discharge port of the evaporation crystallizer is connected to the inlet of the transfer pump through a first pipeline, a concentration monitor is arranged in the evaporation crystallizer, and a first discharging valve is arranged on the first pipeline; the outlet of the transfer pump is connected to the inlet of the thickener through a second pipeline, and a first reflux pipeline connected to the evaporation crystallizer is arranged on the second pipeline; a first reflux valve is arranged on the first reflux pipeline; a first regulating valve is arranged on the second pipeline between the thickener and the first reflux pipeline; a detection stirring execution unit is arranged on the thickener; the discharge port of the thickener is connected to the inlet of the centrifugal drying unit through a third pipeline, and a discharging regulating unit is arranged on the third pipeline; the centrifugal drying unit is configured to sequentially perform centrifugal separation treatment and drying treatment on the material output by the thickener, and convey the dried material obtained after the treatment to the packing unit; the packing unit is configured to perform packing treatment on the dried material; the automatic salt discharging device is configured to trigger the opening of the first discharging valve and the transfer pump, and when the concentration monitor detects that the material concentration in the evaporation crystallizer reaches a preset concentration, trigger the first regulating valve to open to a first preset opening degree; and when the target parameter detected by the detection stirring execution unit meets a first preset condition, trigger the first regulating valve to adjust the opening degree and the first reflux valve to open to a second preset opening degree, and after triggering the centrifugal drying unit to start, then trigger the opening of the discharging regulating unit and the packing unit; and trigger the first regulating valve, the first reflux valve, and the discharging regulating unit to adjust the opening degree according to the target parameter detected by the detection stirring execution unit.

[0006] Optionally, a flow meter is further arranged on the second pipeline between the thickener and the first reflux pipeline, and the flow meter is located at the inlet end of the first regulating valve; the automatic salt discharging device is configured to, when the flow rate detected by the flow meter is lower than a preset flow rate, trigger the first regulating valve to increase the opening degree and the first reflux valve to decrease the opening degree; and when the flow rate detected by the flow meter is higher than the preset flow rate, trigger the first regulating valve to decrease the opening degree and the first reflux valve to increase the opening degree.

[0007] Optionally, the automatic salt discharging device further includes a first cleaning assembly. The first cleaning assembly includes a first cleaning pipeline provided with a first cleaning valve, a second cleaning pipeline provided with a second cleaning valve, and a second reflux pipeline provided with a second reflux valve. The first cleaning pipeline is arranged on the first pipeline between the evaporation crystallizer and the first blanking valve. The second cleaning pipeline is arranged on the first pipeline between the first blanking valve and the transfer pump. The first end of the second reflux pipeline is arranged on the second pipeline between the transfer pump and the first reflux pipeline, and the second end of the second reflux pipeline is arranged on the first pipeline between the first blanking valve and the transfer pump. The automatic salt discharging device is configured to, when the opening time of the first blanking valve reaches a first preset blanking time, trigger the first blanking valve to close, and the first regulating valve and the first reflux valve to reduce their opening degrees, and trigger the first cleaning valve, the second cleaning valve, and the second reflux valve to open. And when the flushing time reaches a first preset flushing time, trigger the first blanking valve to open, and the first cleaning valve, the second cleaning valve, and the second reflux valve to close, and sequentially trigger the first regulating valve to increase to the first preset opening degree and the first reflux valve to increase to the second preset opening degree.

[0008] Optionally, the detection and stirring execution unit includes a first weighing module and a stirring motor. The first weighing module is used to detect the weight of the material in the thickener. An ammeter is arranged on the stirring motor, and the ammeter is used to detect the current of the stirring motor. The target parameters include the weight of the material in the thickener and the current of the stirring motor. The automatic salt discharging device is configured to, when the current detected by the ammeter is higher than the preset current, trigger the stirring motor to increase its rotation speed. And when the current detected by the ammeter is lower than the preset current, trigger the stirring motor to reduce its rotation speed.

[0009] Optionally, the automatic salt discharging device is configured to, according to the target parameters detected by the detection and stirring execution unit, trigger the first regulating valve, the first reflux valve, and the blanking regulating unit to adjust their opening degrees, including: The automatic salt discharging device is configured to, when the weight of the material in the thickener reaches a first preset weight, trigger the first regulating valve to reduce its opening degree and the first reflux valve to open to the second preset opening degree. And when the weight of the material in the thickener is higher than the first preset weight or the current of the stirring motor is higher than the preset current, trigger the first regulating valve to reduce its opening degree and the first reflux valve to increase its opening degree. And when the weight of the material in the thickener is lower than the first preset weight or the current of the stirring motor is lower than the preset current, trigger the first regulating valve to increase its opening degree and the first reflux valve to reduce its opening degree.

[0010] Optionally, the blanking adjustment unit includes a second blanking valve and a third blanking valve. The automatic salt discharging device is configured to trigger the opening of the second blanking valve and the opening of the third blanking valve to a third preset opening degree when the weight of the material in the thickener reaches the first preset weight; and when the weight of the material in the thickener is higher than the first preset weight or the current of the stirring motor is higher than the preset current, trigger the third blanking valve to increase the opening degree; and when the weight of the material in the thickener is lower than the first preset weight or the current of the stirring motor is lower than the preset current, trigger the third blanking valve to decrease the opening degree.

[0011] Optionally, a third cleaning pipeline is connected to the third pipeline between the thickener and the second blanking valve, and a third cleaning valve is arranged on the third cleaning pipeline; a fourth cleaning pipeline is connected to the third pipeline between the second blanking valve and the third blanking valve, and a fourth cleaning valve is arranged on the fourth cleaning pipeline; the automatic salt discharging device is configured to trigger the third cleaning valve to open to a fourth preset opening degree when triggering the opening of the second blanking valve; and when the opening time of the second blanking valve and the third blanking valve reaches the second preset blanking time, trigger the second blanking valve to close and the conveyor in the centrifugal drying unit to reverse, and trigger the third cleaning valve and the third blanking valve to increase the opening degree and the fourth cleaning valve and the discharge valve in the centrifugal drying unit to open; and when the flushing time reaches the second preset flushing time, trigger the fourth cleaning valve to close, trigger the third cleaning valve to decrease to the fourth preset opening degree and the third blanking valve to decrease to the third preset opening degree, then trigger the second blanking valve to open and the conveyor to rotate forward, and trigger the discharge valve to close.

[0012] Optionally, the centrifugal drying unit includes a centrifuge, a conveyor, a drying device, and a hoist connected in sequence. The discharge port of the thickener is connected to the feed port of the centrifuge through the third pipeline; a discharge pipeline is connected to the discharge port of the centrifuge, and a discharge valve is provided on the discharge pipeline; a first thermometer is provided at the feed port of the drying device; the discharge port of the drying device is connected to the input end of the hoist, and the hoist is used to convey the dried material to the packing unit; the automatic salt discharging device is configured to, when triggering the opening of the centrifugal drying unit, first trigger the opening of the conveyor and trigger the conveyor to reverse, and then trigger the opening of the centrifuge, the drying device, the hoist, and the discharge valve; and when the temperature detected by the first thermometer reaches the preset inlet temperature and after the centrifuge has been operating for a preset time, trigger the closing of the discharge valve and the forward rotation of the conveyor, and trigger the opening of the second feed valve and the opening of the third feed valve to the third preset opening; and when the temperature detected by the first thermometer is higher than the preset inlet temperature, trigger the third feed valve to increase the opening, and when the temperature detected by the first thermometer is lower than the preset inlet temperature, trigger the third feed valve to decrease the opening.

[0013] Optionally, a hot air blower, a cold air blower, an exhaust gas blower, a negative pressure gauge, and a second thermometer are connected to the drying device; the hot air blower is connected to the hot air inlet of the drying device through a hot air pipeline, and a second regulating valve is provided on the hot air pipeline; the cold air blower is connected to the cold air inlet of the drying device through a cold air pipeline, and a third regulating valve is provided on the cold air pipeline; the exhaust gas blower is connected to the exhaust gas outlet of the drying device through an exhaust gas pipeline, and a fourth regulating valve is provided on the exhaust gas pipeline; the negative pressure gauge is used to detect the pressure inside the drying device; the second thermometer is provided at the discharge port of the drying device; the automatic salt discharging device is configured to, when triggering the opening of the drying device, trigger the opening of the hot air blower, the cold air blower, and the exhaust gas blower, and trigger the second regulating valve to open to the fifth preset opening, the third regulating valve to open to the sixth preset opening, and the fourth regulating valve to open to the seventh preset opening; and according to the temperature detected by the first thermometer and the preset inlet temperature, trigger the second regulating valve to adjust the opening; according to the temperature detected by the second thermometer and the preset outlet temperature, trigger the third regulating valve to adjust the opening; according to the pressure detected by the negative pressure gauge and the preset pressure, trigger the fourth regulating valve to adjust the opening.

[0014] Optionally, the packing unit includes a silo, a first hopper, a second hopper, and a packing machine. The feed inlet of the silo is connected to the output end of the centrifugal drying unit through a lifting pipeline. The discharge outlet of the silo is connected to the feed inlet of the first hopper through a fourth pipeline, and a fifth regulating valve is provided on the fourth pipeline. A second weighing module is provided on the first hopper, and the second weighing module is used to detect the weight of the material in the first hopper. The discharge outlet of the first hopper is connected to the feed inlet of the second hopper through a fifth pipeline, and a fourth discharge valve is provided on the fifth pipeline. The discharge outlet of the second hopper is connected to the packing machine through a sixth pipeline, and a fifth discharge valve is provided on the sixth pipeline. The automatic salt discharging device is configured to, after the centrifugal drying unit is started, trigger the packing machine to start and the fifth regulating valve to open to an eighth preset opening degree to start packing the material; and during the packing process of the material, perform the following operations: trigger the fifth regulating valve to adjust the opening degree according to the weight detected by the second weighing module and a second preset weight; when triggering the fifth regulating valve to close, trigger the fourth discharge valve and the fifth discharge valve to open; when all the material in the first hopper is conveyed to the second hopper, trigger the fourth discharge valve to close and the fifth regulating valve to open to the eighth preset opening degree.

[0015] Compared with the prior art, the automatic salt discharging device provided by the present utility model has the following beneficial effects:

[0016] The automatic salt discharging device provided by the utility model comprises an evaporation crystallizer, a transfer pump, a thickener, a centrifugal drying unit and a packing unit; the discharge port of the evaporation crystallizer is connected to the inlet of the transfer pump through a first pipeline, a concentration monitor is arranged in the evaporation crystallizer, and a first blanking valve is arranged on the first pipeline; the outlet of the transfer pump is connected to the inlet of the thickener through a second pipeline, and a first reflux pipeline connected to the evaporation crystallizer is arranged on the second pipeline; a first reflux valve is arranged on the first reflux pipeline; a first regulating valve is arranged on the second pipeline between the thickener and the first reflux pipeline; a detection and stirring execution unit is arranged on the thickener; the discharge port of the thickener is connected to the inlet of the centrifugal drying unit through a third pipeline, and a blanking regulating unit is arranged on the third pipeline; the centrifugal drying unit is configured to sequentially perform centrifugal separation treatment and drying treatment on the materials output by the thickener, and convey the dried materials obtained after the treatment to the packing unit; the packing unit is configured to perform packing treatment on the dried materials; the automatic salt discharging device is configured to trigger the opening of the first blanking valve and the transfer pump, and when the concentration monitor detects that the material concentration in the evaporation crystallizer reaches a preset concentration, trigger the first regulating valve to open to a first preset opening degree; and when the target parameters detected by the detection and stirring execution unit meet a first preset condition, trigger the first regulating valve to adjust the opening degree and the first reflux valve to open to a second preset opening degree, and after triggering the centrifugal drying unit to start, then trigger the blanking regulating unit to start and the packing unit to start; and trigger the first regulating valve, the first reflux valve and the blanking regulating unit to adjust the opening degree according to the target parameters detected by the detection and stirring execution unit. Thus, the automatic salt discharging device provided by the utility model can monitor the material concentration in the evaporation crystallizer by arranging a concentration monitor in the evaporation crystallizer. By arranging a first blanking valve on the first pipeline between the evaporation crystallizer and the transfer pump and a first regulating valve on the second pipeline between the transfer pump and the thickener, when discharging salt, the first blanking valve and the transfer pump can be triggered to open, and when the material concentration in the evaporation crystallizer reaches a preset concentration, the first regulating valve can be triggered to open to a first preset opening degree, so that the materials in the evaporation crystallizer can be automatically output to the thickener. By arranging a first reflux pipeline connected to the evaporation crystallizer on the second pipeline and a first reflux valve on the first reflux pipeline, a basis is laid for adjusting the feeding amount of the thickener. By arranging a detection and stirring execution unit on the thickener, when the target parameters detected by the detection and stirring execution unit meet a first preset condition, the first regulating valve can be triggered to adjust the opening degree and the first reflux valve can be opened to a second preset opening degree, so that the feeding amount of the thickener can be automatically adjusted; and the centrifugal drying unit can be triggered to start, so that the humidity in the centrifugal drying unit can be reduced.Furthermore, by arranging a blanking adjustment unit on the third pipeline between the thickener and the centrifugal drying unit, after triggering the start of the centrifugal drying unit, triggering the blanking adjustment unit and the packing unit to start can avoid the increase in the water content of the material entering the centrifugal drying unit, thereby improving the stability of the centrifugal drying unit. In addition, according to the target parameters detected by the detection stirring execution unit, the opening degrees of the first regulating valve, the first reflux valve and the blanking adjustment unit can be triggered to be adjusted, so that the automatic salt discharging device can discharge salt stably. The automatic salt discharging device provided by the utility model can automatically control the processes of dehydration, drying and packing of the industrial salt solution, thereby reducing the frequent operations of on-site operators and improving the work efficiency.

[0017] Further, the automatic salt discharging device further includes a first cleaning assembly. The first cleaning assembly includes a first cleaning pipeline provided with a first cleaning valve, a second cleaning pipeline provided with a second cleaning valve, and a second reflux pipeline provided with a second reflux valve. The first cleaning pipeline is arranged on the first pipeline between the evaporation crystallizer and the first blanking valve. The second cleaning pipeline is arranged on the first pipeline between the first blanking valve and the transfer pump. The first end of the second reflux pipeline is arranged on the second pipeline between the transfer pump and the first reflux pipeline. The second end of the second reflux pipeline is arranged on the first pipeline between the first blanking valve and the transfer pump. The automatic salt discharging device is configured to trigger the closing of the first blanking valve, the reduction of the opening degrees of the first regulating valve and the first reflux valve, and the opening of the first cleaning valve, the second cleaning valve and the second reflux valve when the opening time of the first blanking valve reaches a first preset blanking time. And when the flushing time reaches a first preset flushing time, it triggers the opening of the first blanking valve, the closing of the first cleaning valve, the second cleaning valve and the second reflux valve, and sequentially triggers the first regulating valve to increase to the first preset opening degree and the first reflux valve to increase to the second preset opening degree. Thus, the automatic salt discharging device provided by the present utility model lays a good foundation for the subsequent automatic cleaning of the first pipeline by arranging the first cleaning pipeline and the second cleaning pipeline on the first pipeline, with the first cleaning valve arranged on the first cleaning pipeline and the second cleaning valve arranged on the second cleaning pipeline. By arranging the second reflux pipeline with the second reflux valve arranged thereon, and setting the first end of the second reflux pipeline on the second pipeline between the transfer pump and the first reflux pipeline, and setting the second end of the second reflux pipeline on the first pipeline between the first blanking valve and the transfer pump, it lays a good foundation for the subsequent automatic cleaning of the transfer pump. Further, when the opening time of the first blanking valve reaches the first preset blanking time, it can trigger the closing of the first blanking valve, the reduction of the opening degrees of the first regulating valve and the first reflux valve, and can trigger the opening of the first cleaning valve, the second cleaning valve and the second reflux valve, so as to automatically clean the first pipeline and the transfer pump. When the flushing time reaches the first preset flushing time, it can trigger the opening of the first blanking valve, the closing of the first cleaning valve, the second cleaning valve and the second reflux valve, and sequentially trigger the first regulating valve to increase to the first preset opening degree and the first reflux valve to increase to the second preset opening degree, so as to automatically resume the feeding of materials to the thickener when the flushing of the first pipeline and the transfer pump is completed.

[0018] Furthermore, the detection and stirring execution unit includes a first weighing module and a stirring motor. The first weighing module is used to detect the weight of the material in the thickener. An ammeter is provided on the stirring motor, and the ammeter is used to detect the current of the stirring motor. The target parameters include the weight of the material in the thickener and the current of the stirring motor. The automatic salt discharging device is configured to trigger the stirring motor to increase the rotation speed when the current detected by the ammeter is higher than the preset current; and trigger the stirring motor to decrease the rotation speed when the current detected by the ammeter is lower than the preset current. Thus, the automatic salt discharging device provided by the present utility model can automatically adjust the feeding amount and discharging amount of the thickener by detecting the weight of the material in the thickener through the first weighing module and the current of the stirring motor through the ammeter, so as to achieve stable salt discharging. Description of the Drawings

[0019] Figure 1 FIG. 1 is a schematic structural diagram of an automatic salt discharging device provided in Embodiment 1 of the present utility model;

[0020] Figure 2 FIG. 2 is a schematic flowchart of an automatic salt discharging method provided in Embodiment 2 of the present utility model;

[0021] The description of the reference numerals is as follows:

[0022] 1 - Evaporation crystallizer, 101 - Concentration monitor, 11 - First pipeline, 111 - First blanking valve, 12 - First cleaning assembly, 121 - First cleaning pipeline, 1211 - First cleaning valve, 122 - Second cleaning pipeline, 1221 - Second cleaning valve, 123 - Second reflux pipeline, 1231 - Second reflux valve, 2 - Transfer pump, 21 - Second pipeline, 211 - First regulating valve, 212 - Flowmeter, 22 - First reflux pipeline, 221 - First reflux valve, 3 - Thickener, 31 - Detection stirring execution unit, 311 - First weighing module, 312 - Stirring motor, 3121 - Ammeter, 32 - Third pipeline, 321 - Blanking regulation unit, 3211 - Second blanking valve, 3212 - Third blanking valve, 33 - Third cleaning pipeline, 331 - Third cleaning valve, 34 - Fourth cleaning pipeline, 341 - Fourth cleaning valve, 4 - Centrifugal drying unit, 41 - Centrifuge, 411 - Discharge pipeline, 4111 - Discharge valve, 42 - Conveyor, 43 - Drying equipment, 431 - First thermometer, 432 - Hot air blower, 4321 - Hot air pipeline, 43211 - Second regulating valve, 433 - Cold air blower, 4331 - Cold air pipeline, 43311 - Third regulating valve, 434 - Exhaust gas blower, 4341 - Exhaust gas pipeline, 43411 - Fourth regulating valve, 435 - Negative pressure gauge, 436 - Second thermometer, 44 - Hoist, 441 - Hoist pipeline, 5 - Packing unit, 51 - Silo, 511 - Fourth pipeline, 5111 - Fifth regulating valve, 52 - First hopper, 521 - Second weighing module, 522 - Fifth pipeline, 5221 - Fourth blanking valve, 53 - Second hopper, 531 - Sixth pipeline, 5311 - Fifth blanking valve, 54 - Packing machine. Detailed implementation mode

[0023] The following further elaborates on the automatic salt discharging device proposed by the present utility model in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model. In order to make the purpose, features, and advantages of the present utility model more obvious and understandable, please refer to the accompanying drawings. It should be noted that the structures, scales, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Any modification of the structure, change in the proportional relationship, or adjustment of the size, in the case of being the same or similar to the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model. The specific design features of the present utility model disclosed herein, including, for example, specific dimensions, directions, positions, and shapes, will be partially determined by the specific application and usage environment. Also, in the following described embodiments, sometimes the same reference numerals are used commonly between different drawings to represent the same parts or parts with the same functions, and the repeated description thereof is omitted.

[0024] Embodiment 1

[0025] This embodiment provides an automatic salt discharging device. Specifically, please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the automatic salt discharging device provided in this embodiment. From Figure 1It can be seen that the automatic salt discharging device includes an evaporation crystallizer 1, a transfer pump 2, a thickener 3, a centrifugal drying unit 4, and a packing unit 5. The discharge port of the evaporation crystallizer 1 is connected to the inlet of the transfer pump 2 through a first pipeline 11. A concentration monitor 101 is arranged in the evaporation crystallizer 1, and a first feed valve 111 is arranged on the first pipeline 11. The outlet of the transfer pump 2 is connected to the inlet of the thickener 3 through a second pipeline 21. A first reflux pipeline 22 connected to the evaporation crystallizer 1 is arranged on the second pipeline 21. A first reflux valve 221 is arranged on the first reflux pipeline 22. A first regulating valve 211 is arranged on the second pipeline 21 between the thickener 3 and the first reflux pipeline 22. A detection and stirring execution unit 31 is arranged on the thickener 3. The discharge port of the thickener 3 is connected to the inlet of the centrifugal drying unit 4 through a third pipeline 32, and a feed regulating unit 321 is arranged on the third pipeline 32. The centrifugal drying unit 4 is configured to sequentially perform centrifugal separation and drying on the material output by the thickener 3, and convey the dried material obtained after the treatment to the packing unit 5. The packing unit 5 is configured to perform packing on the dried material. The automatic salt discharging device is configured to trigger the opening of the first feed valve 111 and the transfer pump 2, and when the concentration monitor 101 detects that the material concentration in the evaporation crystallizer 1 reaches a preset concentration, trigger the first regulating valve 211 to open to a first preset opening degree. And when the target parameter detected by the detection and stirring execution unit 31 meets a first preset condition, trigger the first regulating valve 211 to adjust the opening degree and the first reflux valve 221 to open to a second preset opening degree, and after triggering the centrifugal drying unit 4 to start, then trigger the feed regulating unit 321 to open and the packing unit 5 to open. And according to the target parameter detected by the detection and stirring execution unit 31, trigger the first regulating valve 211, the first reflux valve 221, and the feed regulating unit 321 to adjust the opening degree.

[0026] Therefore, for the automatic salt discharging device provided in this embodiment, by arranging a concentration monitor 101 in the evaporation crystallizer 1, the material concentration in the evaporation crystallizer 1 can be monitored. By arranging a first blanking valve 111 on the first pipeline 11 between the evaporation crystallizer 1 and the transfer pump 2, and arranging a first regulating valve 211 on the second pipeline 21 between the transfer pump 2 and the thickener 3, when discharging salt, the first blanking valve 111 and the transfer pump 2 can be triggered to open. When the material concentration in the evaporation crystallizer 1 reaches the preset concentration, the first regulating valve 211 can be triggered to open to the first preset opening degree, so that the material in the evaporation crystallizer 1 can be automatically output to the thickener 3. By arranging a first reflux pipeline 22 connected to the evaporation crystallizer 1 on the second pipeline 21, and arranging a first reflux valve 221 on the first reflux pipeline 22, a foundation is laid for adjusting the feed amount of the thickener 3. By arranging a detection stirring execution unit 31 on the thickener 3, when the target parameters detected by the detection stirring execution unit 31 meet the first preset conditions, the first regulating valve 211 can be triggered to adjust the opening degree and the first reflux valve 221 can be opened to the second preset opening degree, so as to automatically adjust the feed amount of the thickener 3; and the centrifugal drying unit 4 can be triggered to start, so as to reduce the humidity in the centrifugal drying unit 4. Further, by arranging a blanking adjustment unit 321 on the third pipeline 32 between the thickener 3 and the centrifugal drying unit 4, after triggering the centrifugal drying unit 4 to start, then triggering the blanking adjustment unit 321 and the packing unit 5 to start, the water content of the material entering the centrifugal drying unit 4 can be prevented from increasing, so as to improve the stability of the centrifugal drying unit 4. In addition, according to the target parameters detected by the detection stirring execution unit 31, the first regulating valve 211, the first reflux valve 221 and the blanking adjustment unit 321 can be triggered to adjust the opening degree, so that the automatic salt discharging device can discharge salt stably. The automatic salt discharging device provided in this embodiment can automatically control the processes of industrial salt solution dehydration, drying and packing, so as to reduce the frequent operations of on-site operators, and further improve the work efficiency.

[0027] It should be noted that, as can be understood by those skilled in the art, the material in the evaporation crystallizer 1 includes an industrial salt solution; the automatic salt discharging device may further include a signal processing unit (not shown in the figure), and a salt discharging monitoring thermometer (not shown in the figure) or a salt discharging monitoring liquid level gauge (not shown in the figure) may also be provided in the evaporation crystallizer 1. When the salt discharging monitoring thermometer detects that the temperature of the material in the evaporation crystallizer 1 reaches the preset salt discharging temperature or when the salt discharging monitoring liquid level gauge detects that the liquid level of the material in the evaporation crystallizer 1 reaches the preset salt discharging liquid level, a salt discharging signal will be sent to the signal processing unit. The signal processing unit generates corresponding control instructions based on the received salt discharging signal and sends these instructions to the first blanking valve 111 and the transfer pump 2, and the automatic salt discharging device starts to discharge salt, and the first blanking valve 111 and the transfer pump 2 are opened. When the concentration monitor 101 detects that the concentration of the material in the evaporation crystallizer 1 reaches the preset concentration, a first signal will be sent to the signal processing unit. The signal processing unit generates corresponding control instructions based on the received first signal and sends these instructions to the first regulating valve 211. In addition, the type of the signal processing unit in this embodiment is not overly limited. Exemplarily, in some embodiments, the signal processing unit can adopt a comparator circuit or can also be implemented by adding corresponding registers and other hardware in a microprocessor.

[0028] Preferably, a flow meter 212 is further provided on the second pipe 21 between the thickener 3 and the first reflux pipe 22, and the flow meter 212 is located at the inlet end of the first regulating valve 211; the automatic salt discharging device is configured to trigger the first regulating valve 211 to increase the opening degree and the first reflux valve 221 to decrease the opening degree when the flow rate detected by the flow meter 212 is lower than the preset flow rate; and to trigger the first regulating valve 211 to decrease the opening degree and the first reflux valve 221 to increase the opening degree when the flow rate detected by the flow meter 212 is higher than the preset flow rate. Thus, by providing the flow meter 212 at the inlet end of the first regulating valve 211, the flow rate of the material transported to the thickener 3 can be monitored. When the flow rate detected by the flow meter 212 is lower than the preset flow rate, the first regulating valve 211 can be triggered to increase the opening degree and the first reflux valve 221 to decrease the opening degree. When the flow rate detected by the flow meter 212 is higher than the preset flow rate, the first regulating valve 211 can be triggered to decrease the opening degree and the first reflux valve 221 to increase the opening degree, so that the feeding amount of the thickener 3 can be automatically adjusted more precisely.

[0029] Further, the automatic salt discharging device further includes a first cleaning assembly 12, and the first cleaning assembly 12 includes a first cleaning pipeline 121 provided with a first cleaning valve 1211, a second cleaning pipeline 122 provided with a second cleaning valve 1221, and a second reflux pipeline 123 provided with a second reflux valve 1231; the first cleaning pipeline 121 is arranged on the first pipeline 11 between the evaporation crystallizer 1 and the first blanking valve 111, and the second cleaning pipeline 122 is arranged on the first pipeline 11 between the first blanking valve 111 and the transfer pump 2; the first end of the second reflux pipeline 123 is arranged on the second pipeline 21 between the transfer pump 2 and the first reflux pipeline 22, and the second end of the second reflux pipeline 123 is arranged on the first pipeline 11 between the first blanking valve 111 and the transfer pump 2; the automatic salt discharging device is configured to trigger the closing of the first blanking valve 111 and the reduction of the opening degrees of the first regulating valve 211 and the first reflux valve 221 when the opening time of the first blanking valve 111 reaches a first preset blanking time, and trigger the opening of the first cleaning valve 1211, the second cleaning valve 1221 and the second reflux valve 1231; and when the flushing time reaches a first preset flushing time, trigger the opening of the first blanking valve 111 and the closing of the first cleaning valve 1211, the second cleaning valve 1221 and the second reflux valve 1231, and sequentially trigger the first regulating valve 211 to increase to the first preset opening degree and the first reflux valve 221 to increase to the second preset opening degree.

[0030] Thus, by providing the first cleaning pipeline 121 and the second cleaning pipeline 122 on the first pipeline 11, with a first cleaning valve 1211 provided on the first cleaning pipeline 121 and a second cleaning valve 1221 provided on the second cleaning pipeline 122, a good foundation is laid for the subsequent automatic cleaning of the first pipeline 11; by providing the second reflux pipeline 123, with a second reflux valve 1231 provided on the second reflux pipeline 123, and setting the first end of the second reflux pipeline 123 on the second pipeline 21 between the transfer pump 2 and the first reflux pipeline 22, and setting the second end of the second reflux pipeline 123 on the first pipeline 11 between the first blanking valve 111 and the transfer pump 2, a good foundation is laid for the subsequent automatic cleaning of the transfer pump 2. Further, when the opening time of the first blanking valve 111 reaches the first preset blanking time, it is possible to trigger the closing of the first blanking valve 111 and the reduction of the opening degrees of the first regulating valve 211 and the first reflux valve 221, and it is possible to trigger the opening of the first cleaning valve 1211, the second cleaning valve 1221 and the second reflux valve 1231, so as to automatically clean the first pipeline 11 and the transfer pump 2; when the flushing time reaches the first preset flushing time, it is possible to trigger the opening of the first blanking valve 111 and the closing of the first cleaning valve 1211, the second cleaning valve 1221 and the second reflux valve 1231, and sequentially trigger the first regulating valve 211 to increase to the first preset opening degree and the first reflux valve 221 to increase to the second preset opening degree, so as to automatically resume the feeding of materials to the thickener 3 when the flushing of the first pipeline 11 and the transfer pump 2 is completed.

[0031] It should be noted that the present embodiment does not impose excessive limitations on the first preset blanking time and the first preset flushing time. For example, in some embodiments, the first preset blanking time can be set to 30 minutes, and the first preset flushing time can be set to 20 seconds. Additionally, when the first cleaning assembly 12 is performing cleaning work, the thickener 3, the centrifugal drying unit 4 and the packing unit 5 are all operating normally, which can improve the salt output efficiency of the automatic salt output device.

[0032] Preferably, the detection and agitation execution unit 31 includes a first weighing module 311 and an agitation motor 312. The first weighing module 311 is used to detect the weight of the material in the thickener 3. An ammeter 3121 is provided on the agitation motor 312, and the ammeter 3121 is used to detect the current of the agitation motor 312. The target parameters include the weight of the material in the thickener 3 and the current of the agitation motor 312. The automatic salt discharging device is configured to trigger the agitation motor 312 to increase the rotation speed when the current detected by the ammeter 3121 is higher than the preset current; and to trigger the agitation motor 312 to decrease the rotation speed when the current detected by the ammeter 3121 is lower than the preset current. Thus, detecting the weight of the material in the thickener 3 by the first weighing module 311 and the current of the agitation motor 312 by the ammeter 3121 lays a solid foundation for automatically adjusting the feeding amount and discharging amount of the thickener 3, so as to achieve stable salt discharging.

[0033] Exemplarily, in one exemplary implementation, the automatic salt discharging device is configured to trigger the first regulating valve 211, the first reflux valve 221 and the feeding regulating unit 321 to adjust the opening degree according to the target parameters detected by the detection and agitation execution unit 31, including: the automatic salt discharging device is configured to trigger the first regulating valve 211 to decrease the opening degree and the first reflux valve 221 to open to the second preset opening degree when the weight of the material in the thickener 3 reaches the first preset weight; and to trigger the first regulating valve 211 to decrease the opening degree and the first reflux valve 221 to increase the opening degree when the weight of the material in the thickener 3 is higher than the first preset weight or the current of the agitation motor 312 is higher than the preset current; and to trigger the first regulating valve 211 to increase the opening degree and the first reflux valve 221 to decrease the opening degree when the weight of the material in the thickener 3 is lower than the first preset weight or the current of the agitation motor 312 is lower than the preset current.

[0034] Further, the feeding regulating unit 321 includes a second feeding valve 3211 and a third feeding valve 3212. The automatic salt discharging device is configured to trigger the second feeding valve 3211 to open and the third feeding valve 3212 to open to the third preset opening degree when the weight of the material in the thickener 3 reaches the first preset weight; and to trigger the third feeding valve 3212 to increase the opening degree when the weight of the material in the thickener 3 is higher than the first preset weight or the current of the agitation motor 312 is higher than the preset current; and to trigger the third feeding valve 3212 to decrease the opening degree when the weight of the material in the thickener 3 is lower than the first preset weight or the current of the agitation motor 312 is lower than the preset current.

[0035] It should be noted that, as can be understood by those skilled in the art, when the first weighing module 311 detects that the weight of the material in the thickener 3 reaches the first preset weight, it will send a second signal to the signal processing unit. The signal processing unit generates corresponding control instructions based on the received second signal and sends these instructions to the first regulating valve 211, the first reflux valve 221, the centrifugal drying unit 4, the second blanking valve 3211, the third blanking valve 3212, and the packing unit 5; when the first weighing module 311 detects that the weight of the material in the thickener 3 is higher than the first preset weight or the ammeter 3121 detects that the current of the stirring motor 312 is higher than the preset current, it will send a third signal to the signal processing unit. The signal processing unit generates corresponding control instructions based on the received third signal and sends these instructions to the first regulating valve 211, the first reflux valve 221, and the third blanking valve 3212; when the first weighing module 311 detects that the weight of the material in the thickener 3 is lower than the first preset weight or the ammeter 3121 detects that the current of the stirring motor 312 is lower than the preset current, it will send a fourth signal to the signal processing unit. The signal processing unit generates corresponding control instructions based on the received fourth signal and sends these instructions to the first regulating valve 211, the first reflux valve 221, and the third blanking valve 3212.

[0036] Preferably, a third cleaning pipeline 33 is connected to the third pipeline 32 between the thickener 3 and the second blanking valve 3211, and a third cleaning valve 331 is provided on the third cleaning pipeline 33; a fourth cleaning pipeline 34 is connected to the third pipeline 32 between the second blanking valve 3211 and the third blanking valve 3212, and a fourth cleaning valve 341 is provided on the fourth cleaning pipeline 34; the automatic salt discharging device is configured to trigger the third cleaning valve 331 to open to a fourth preset opening degree when triggering the second blanking valve 3211 to open; and when the opening time of the second blanking valve 3211 and the third blanking valve 3212 reaches a second preset blanking time, trigger the second blanking valve 3211 to close and the conveyor 42 in the centrifugal drying unit 4 to reverse, and trigger the third cleaning valve 331 and the third blanking valve 3212 to increase the opening degree and the fourth cleaning valve 341 and the discharge valve 4111 in the centrifugal drying unit 4 to open; and when the flushing time reaches a second preset flushing time, trigger the fourth cleaning valve 341 to close, trigger the third cleaning valve 331 to decrease to the fourth preset opening degree and the third blanking valve 3212 to decrease to the third preset opening degree, and then trigger the second blanking valve 3211 to open and the conveyor 42 to rotate forward, and trigger the discharge valve 4111 to close. Thus, by providing the third cleaning pipeline 33 on the third pipeline 32 between the thickener 3 and the second blanking valve 3211, when the second blanking valve 3211 is triggered to open, the third cleaning valve 331 on the third cleaning pipeline 33 can be triggered to open, so that the thickener 3 can discharge materials smoothly and avoid blocking the blanking pipeline of the thickener 3; moreover, when the opening time of the second blanking valve 3211 and the third blanking valve 3212 reaches the second preset blanking time, the second blanking valve 3211 can be triggered to close and the third cleaning valve 331 to increase the opening degree, so as to clean the third pipeline 32 between the thickener 3 and the second blanking valve 3211. By providing the fourth cleaning pipeline 34 on the third pipeline 32 between the second blanking valve 3211 and the third blanking valve 3212, when the opening time of the second blanking valve 3211 and the third blanking valve 3212 reaches the second preset blanking time, the conveyor 42 in the centrifugal drying unit 4 can be triggered to reverse, the third blanking valve 3212 to increase the opening degree, and the fourth cleaning valve 341 and the discharge valve 4111 in the centrifugal drying unit 4 to open, so as to clean the third pipeline 32 between the second blanking valve 3211 and the centrifugal drying unit 4 and the centrifugal drying unit 4.

[0037] It should be noted that when the second blanking valve 3211 is opened, the value of the fourth preset opening degree that triggers the opening of the third cleaning valve 331 on the third cleaning pipeline 33 is usually small, as long as the thickener 3 can discharge materials smoothly. In addition, in this embodiment, the second preset blanking time and the second preset flushing time are not overly limited. For example, in some implementation manners, the second preset blanking time can be set to 30 minutes, and the second preset flushing time can be set to 30 seconds. Moreover, when the third cleaning pipeline 33 and the fourth cleaning pipeline 34 are performing cleaning operations, the evaporation crystallizer 1, the transfer pump 2, the thickener 3, and the packing unit 5 are all operating normally, which can improve the salt discharging efficiency of the automatic salt discharging device.

[0038] Further, the centrifugal drying unit 4 includes a centrifuge 41, a conveyor 42, a drying device 43, and an elevator 44 connected in sequence. The discharge port of the thickener 3 is connected to the feed port of the centrifuge 41 through the third pipeline 32; a discharge pipeline 411 is connected to the discharge port of the centrifuge 41, and a discharge valve 4111 is provided on the discharge pipeline 411; a first thermometer 431 is provided at the feed port of the drying device 43; the discharge port of the drying device 43 is connected to the input end of the elevator 44, and the elevator 44 is used to convey the dried material to the packing unit 5; the automatic salt discharging device is configured to, when triggering the opening of the centrifugal drying unit 4, first trigger the opening of the conveyor 42 and trigger the conveyor 42 to reverse, and then trigger the opening of the centrifuge 41, the drying device 43, the elevator 44, and the discharge valve 4111; and when the temperature detected by the first thermometer 431 reaches a preset inlet temperature, and after the centrifuge 41 has been operating stably for a preset time, trigger the closing of the discharge valve 4111 and the forward rotation of the conveyor 42, and trigger the opening of the second blanking valve 3211 and the opening of the third blanking valve 3212 to the third preset opening; and when the temperature detected by the first thermometer 431 is higher than the preset inlet temperature, trigger the third blanking valve 3212 to increase the opening, and when the temperature detected by the first thermometer 431 is lower than the preset inlet temperature, trigger the third blanking valve 3212 to decrease the opening. Thus, the material output from the thickener 3 is centrifugally separated by the centrifuge 41, which can remove the moisture in the material and prevent the excessive moisture in the material from affecting the operation of the drying device 43. Further, before the thickener 3 discharges materials, by first triggering the opening of the conveyor 42 and triggering the conveyor 42 to reverse, and then triggering the opening of the centrifuge 41, the drying device 43, the elevator 44, and the discharge valve 4111, the wet salt remaining in the centrifuge 41 can be discharged, thereby avoiding increasing the humidity of the material and laying a good foundation for improving the operation stability and drying effect of the drying device 43. By providing the first thermometer 431 at the feed port of the drying device 43, the inlet temperature of the drying device 43 can be detected. When the temperature detected by the first thermometer 431 reaches the preset inlet temperature, and after the centrifuge 41 has been operating stably for a preset time, the material can be conveyed to the drying device 43 for drying treatment, thereby improving the drying effect of the drying device 43.Moreover, when the temperature detected by the first thermometer 431 is higher than the preset inlet temperature, it can trigger the third blanking valve 3212 to increase the opening degree, so that the blanking amount of the thickener 3 increases, thereby improving the working efficiency of the drying device 43; when the temperature detected by the first thermometer 431 is lower than the preset inlet temperature, that is, the inlet temperature of the drying device 43 is lower than the preset inlet temperature, it can trigger the third blanking valve 3212 to decrease the opening degree, so that the blanking amount of the thickener 3 decreases, thereby avoiding the excessive blanking amount of the thickener 3 from affecting the normal operation of the centrifuge 41 and the drying device 43.

[0039] It should be noted that the centrifuge 41 can be, but is not limited to, a two-stage pusher centrifuge, which can improve the working efficiency of the automatic salt discharging device. In addition, the specific duration of the preset stable operation time of the centrifuge 41 in this embodiment is not overly limited, as long as the centrifuge 41 can operate stably after the preset stable operation time is started. Moreover, the conveyor 42 is a two-way conveyor. The conveying direction of the conveyor 42 to the drying device 43 is defined as the forward rotation direction of the conveyor 42, and the conveying direction of the conveyor 42 to the centrifuge 41 is defined as the reverse rotation direction of the conveyor 42.

[0040] It should be noted that a mother liquor buffer tank (not marked in the figure) is provided at the mother liquor outlet of the centrifuge 41. The output end of the discharge pipe 411 is connected to the mother liquor buffer tank, and the output end of the mother liquor buffer tank is connected to the evaporation crystallizer 1 through a conveying pipe (not marked in the figure). Thus, by collecting the liquid discharged from the centrifuge 41 through the mother liquor buffer tank and then transporting the collected liquid to the evaporation crystallizer 1 for recycling, the resource utilization efficiency can be improved and the salt production cost can be reduced.

[0041] Exemplarily, in one of the exemplary embodiments, a hot air blower 432, a cold air blower 433, an exhaust gas blower 434, a negative pressure gauge 435, and a second thermometer 436 are connected to the drying device 43; the hot air blower 432 is connected to the hot air inlet of the drying device 43 through a hot air pipeline 4321, and a second regulating valve 43211 is provided on the hot air pipeline 4321; the cold air blower 433 is connected to the cold air inlet of the drying device 43 through a cold air pipeline 4331, and a third regulating valve 43311 is provided on the cold air pipeline 4331; the exhaust gas blower 434 is connected to the exhaust gas outlet of the drying device 43 through an exhaust gas pipeline 4341, and a fourth regulating valve 43411 is provided on the exhaust gas pipeline 4341; the negative pressure gauge 435 is used to detect the pressure inside the drying device 43; the second thermometer 436 is arranged at the discharge port of the drying device 43; the automatic salt discharging device is configured to, when triggering the drying device 43 to start, trigger the hot air blower 432, the cold air blower 433, and the exhaust gas blower 434 to start, and trigger the second regulating valve 43211 to open to a fifth preset opening degree, the third regulating valve 43311 to open to a sixth preset opening degree, and the fourth regulating valve 43411 to open to a seventh preset opening degree; and according to the temperature detected by the first thermometer 431 and the preset inlet temperature, trigger the second regulating valve 43211 to adjust the opening degree; according to the temperature detected by the second thermometer 436 and the preset outlet temperature, trigger the third regulating valve 43311 to adjust the opening degree; according to the pressure detected by the negative pressure gauge 435 and the preset pressure, trigger the fourth regulating valve 43411 to adjust the opening degree. Thus, by starting the hot air blower 432, air flow can enter the drying device 43 under the action of pressure, blowing the materials inside the drying device 43 into a suspended state, which can increase the contact area between the materials and the hot air, facilitate the rapid transfer of heat, and thus improve the drying efficiency; by providing the second regulating valve 43211 on the hot air pipeline 4321, the inlet temperature of the drying device 43 can be adjusted, so that the inlet temperature of the drying device 43 can be maintained within a suitable range. By starting the cold air blower 433, cold air can be conveyed to the discharge port of the drying device 43 to cool the materials after drying; by providing the third regulating valve 43311 on the cold air pipeline 4331, the outlet temperature of the drying device 43 can be adjusted, and the second thermometer 436 is arranged at the discharge port of the drying device 43 to detect the outlet temperature of the drying device 43, so that the outlet temperature of the drying device 43 can be maintained within a suitable range, avoiding the influence of too high or too low material temperature on the stable operation of the subsequent processing equipment.By turning on the tail gas fan 434, the tail gas generated during the drying process can be effectively extracted from the drying equipment 43, maintaining a slightly negative pressure inside the drying equipment 43, so that the materials inside the drying equipment 43 form a semi-suspended state, thereby improving the drying efficiency. By setting the fourth regulating valve 43411 on the tail gas pipeline 4341, the pressure inside the drying equipment 43 can be adjusted, and the pressure inside the drying equipment 43 is detected by the negative pressure gauge 435, so that the pressure inside the drying equipment 43 can be maintained within a suitable range, enabling the materials in the drying equipment 43 to be conveyed to the elevator 44.

[0042] Specifically, when the temperature detected by the first thermometer 431 is higher than the preset inlet temperature, it triggers the second regulating valve 43211 to reduce the opening degree; when the temperature detected by the first thermometer 431 is lower than the preset inlet temperature, it triggers the second regulating valve 43211 to increase the opening degree. When the temperature detected by the second thermometer 436 is higher than the preset outlet temperature, it triggers the third regulating valve 43311 to increase the opening degree; when the temperature detected by the second thermometer 436 is lower than the preset outlet temperature, it triggers the third regulating valve 43311 to reduce the opening degree. When the pressure detected by the negative pressure gauge 435 is higher than the preset pressure, it triggers the fourth regulating valve 43411 to reduce the opening degree; when the pressure detected by the negative pressure gauge 435 is lower than the preset pressure, it triggers the fourth regulating valve 43411 to increase the opening degree.

[0043] It should be noted that the drying equipment 43 can be, but is not limited to, a vibrating fluidized bed dryer, a fluidized bed dryer, a paddle dryer, a disk dryer, and a pneumatic dryer.

[0044] Exemplarily, in one exemplary embodiment, the packing unit 5 includes a silo 51, a first hopper 52, a second hopper 53, and a packing machine 54. The feed inlet of the silo 51 is connected to the output end of the centrifugal drying unit 4 through a lifting pipe 441. The discharge outlet of the silo 51 is connected to the feed inlet of the first hopper 52 through a fourth pipe 511, and a fifth regulating valve 5111 is provided on the fourth pipe 511. A second weighing module 521 is provided on the first hopper 52, and the second weighing module 521 is used to detect the weight of the material in the first hopper 52. The discharge outlet of the first hopper 52 is connected to the feed inlet of the second hopper 53 through a fifth pipe 522, and a fourth discharge valve 5221 is provided on the fifth pipe 522. The discharge outlet of the second hopper 53 is connected to the packing machine 54 through a sixth pipe 531, and a fifth discharge valve 5311 is provided on the sixth pipe 531. The automatic salt discharging device is configured to, after the centrifugal drying unit 4 is started, trigger the packing machine 54 to start and the fifth regulating valve 5111 to open to an eighth preset opening degree to start packing the material; and during the packing process of the material, perform the following operations: trigger the fifth regulating valve 5111 to adjust the opening degree according to the weight detected by the second weighing module 521 and a second preset weight; when triggering the fifth regulating valve 5111 to close, trigger the fourth discharge valve 5221 and the fifth discharge valve 5311 to open; when all the material in the first hopper 52 is conveyed to the second hopper 53, trigger the fourth discharge valve 5221 to close and the fifth regulating valve 5111 to open to the eighth preset opening degree. Thus, the dry material output by the centrifugal drying unit 4 is stored in the silo 51, facilitating subsequent automatic packing. By providing the fifth regulating valve 5111 on the fourth pipe 511 between the silo 51 and the first hopper 52, and triggering the fifth regulating valve 5111 to adjust the opening degree according to the weight detected by the second weighing module 521 provided on the first hopper 52 and the second preset weight, the weight of the material to be packed in the first hopper 52 can be measured more accurately, improving the packing accuracy of the packing machine 54. By providing the second hopper 53 between the first hopper 52 and the packing machine 54, while the material in the second hopper 53 is conveyed to the packing machine 54 for packing, the first hopper 52 can weigh the material, thereby improving the packing efficiency.

[0045] Exemplarily, in one exemplary implementation, the second preset weight includes a first gradient preset weight, a second gradient preset weight, and a third gradient preset weight with sequentially increasing values, where the third gradient preset weight is the target packing weight. When the weight detected by the second weighing module 521 reaches the first gradient preset weight, the fifth regulating valve 5111 is triggered to decrease to the first gradient preset opening; when the weight detected by the second weighing module 521 reaches the second gradient preset weight, the fifth regulating valve 5111 is triggered to decrease to the second gradient preset opening; when the weight detected by the second weighing module 521 gradually increases from the second gradient preset weight, the fifth regulating valve 5111 is triggered to gradually decrease from the second gradient preset opening; when the weight detected by the second weighing module 521 reaches the third gradient preset weight, the fifth regulating valve 5111 is triggered to close. Specifically, when packing 1000 kg of dry salt and the eighth preset opening set on the fifth regulating valve 5111 is 100%, the first gradient preset weight is set to 800 kg, the second gradient preset weight is set to 900 kg, the third gradient preset weight is set to 1000 kg, the first gradient preset opening is set to 50%, and the second gradient preset opening is set to 20%. When the weight detected by the second weighing module 521 reaches 800 kg, the fifth regulating valve 5111 is triggered to decrease to an opening of 50%; when the weight detected by the second weighing module 521 reaches 900 kg, the fifth regulating valve 5111 is triggered to decrease to an opening of 20%; when the weight detected by the second weighing module 521 gradually increases from 900 kg, the fifth regulating valve 5111 is triggered to gradually decrease from an opening of 20%; when the weight detected by the second weighing module 521 reaches 1000 kg, the fifth regulating valve 5111 is triggered to close.

[0046] It should be noted that this embodiment does not overly limit the specific number of gradient preset weights included in the second preset weight, as long as the last gradient preset weight is the target packing weight. For example, in some other implementations, the second preset weight includes a first gradient preset weight, a second gradient preset weight, a third gradient preset weight, and a fourth gradient preset weight with sequentially increasing values, where the fourth gradient preset weight is the target packing weight.

[0047] In addition, this embodiment does not overly limit the values of the preset weights of each gradient in the second preset weight and the values of the preset openings of each gradient in the fifth regulating valve 5111. For example, in some other embodiments, when packing 500 kg of dry salt and the eighth preset opening set on the fifth regulating valve 5111 is 80%, the first gradient preset weight is set to 400 kg, the second gradient preset weight is set to 450 kg, the third gradient preset weight is set to 500 kg, the first gradient preset opening is set to 40%, and the second gradient preset opening is set to 10%. When the weight detected by the second weighing module 521 reaches 400 kg, trigger the fifth regulating valve 5111 to reduce to an opening of 40%; when the weight detected by the second weighing module 521 reaches 450 kg, trigger the fifth regulating valve 5111 to reduce to an opening of 10%; when the weight detected by the second weighing module 521 gradually increases from 450 kg, trigger the fifth regulating valve 5111 to gradually reduce from an opening of 10%; when the weight detected by the second weighing module 521 reaches 500 kg, trigger the fifth regulating valve 5111 to close.

[0048] Embodiment 2

[0049] This embodiment provides an automatic salt discharging method, using the automatic salt discharging device described in any of the above embodiments. Specifically, please refer to Figure 2 , Figure 2 which is a schematic flow diagram of an automatic salt discharging method provided by this embodiment. It can be seen from Figure 2 that the automatic salt discharging method includes:

[0050] S100: Trigger the first blanking valve 111 and the transfer pump 2 to start, and when the concentration monitor 101 detects that the material concentration in the evaporation crystallizer 1 reaches the preset concentration, trigger the first regulating valve 211 to open to the first preset opening;

[0051] S200: When the target parameters detected by the detection and stirring execution unit 31 meet the first preset condition, trigger the first regulating valve 211 to adjust the opening and the first reflux valve 221 to open to the second preset opening, and after triggering the centrifugal drying unit 4 to start, then trigger the blanking adjustment unit 321 to start and the packing unit 5 to start;

[0052] S300: According to the target parameters detected by the detection and stirring execution unit 31, trigger the first regulating valve 211, the first reflux valve 221, and the blanking adjustment unit 321 to adjust the opening.

[0053] Thus, the automatic salt discharging method provided in this embodiment and the automatic salt discharging device provided in any of the above embodiments belong to the same inventive concept. Therefore, the automatic salt discharging method provided in this embodiment has at least all the advantages of the automatic salt discharging devices provided in the above embodiments. For the advantages of the automatic salt discharging method provided in this embodiment, please refer to the relevant descriptions of the beneficial effects of the automatic salt discharging devices provided in the above embodiments, which will not be elaborated here.

[0054] For a better understanding of the present utility model, exemplarily, please refer to Figure 1 to illustrate the process of using the automatic salt discharging method provided in this embodiment to treat the zero-discharge industrial salt solution.

[0055] First, when discharging salt, the first blanking valve and the transfer pump are triggered to open. The concentration monitor 101 continuously monitors the concentration of the industrial salt solution in the evaporation crystallizer 1. When the concentration of the industrial salt solution reaches the preset concentration, the first regulating valve 211 is triggered to open to the first preset opening degree. The industrial salt solution in the evaporation crystallizer 1 is transported to the thickener 3 through the transfer pump 2, and the industrial salt solution in the thickener 3 gradually increases.

[0056] Then, when the first weighing module 311 on the thickener 3 detects that the weight of the industrial salt solution in the thickener 3 reaches the first preset weight, the first regulating valve 211 is triggered to reduce the opening degree and the first reflux valve 221 is triggered to open to the second preset opening degree. At the same time, the conveyor 42 is triggered to start and reverse, and then the centrifuge 41, the drying device 43, the elevator 44, and the discharge valve 4111 are triggered to open.

[0057] Next, when the temperature detected by the first thermometer 431 in the drying device 43 reaches the preset inlet temperature and the centrifuge 41 runs stably, the discharge valve 4111 is triggered to close and the conveyor 42 is triggered to rotate forward. At the same time, the second blanking valve 3211 and the third blanking valve 3212 are triggered to open to the third preset opening degree, and the third cleaning valve 331 is triggered to open to the fourth preset opening degree, so that the industrial salt solution in the thickener 3 can smoothly enter the centrifuge 41 for dehydration, and then is transported to the drying device 43 through the conveyor 42 for drying treatment to obtain dried salt. At the same time, the packing machine 54 and the fifth regulating valve 5111 are triggered to open to the eighth preset opening degree.

[0058] Subsequently, the elevator 44 transports the dried salt to the silo 51. The dried salt in the silo 51 enters the first hopper 52 through the fourth pipeline 511 for weighing, and the dried salt in the first hopper 52 gradually increases. When the second weighing module 521 provided on the first hopper 52 detects that the weight of the dried salt in the first hopper 52 reaches the first gradient preset weight, the fifth regulating valve 5111 is triggered to decrease from the eighth preset opening to the first gradient preset opening; when the weight of the dried salt in the first hopper 52 reaches the second gradient preset weight, the fifth regulating valve 5111 is triggered to decrease from the first gradient preset opening to the second gradient preset opening; when the weight of the dried salt in the first hopper 52 gradually increases from the second gradient preset weight, the fifth regulating valve 5111 is triggered to gradually decrease, until when the weight of the dried salt in the first hopper 52 reaches the third gradient preset weight, the fifth regulating valve 5111 is triggered to close. When the fifth regulating valve 5111 closes, the fourth discharge valve 5221 and the fifth discharge valve 5311 are triggered to open, and the dried salt is transported to the packing machine 54 through the second hopper 53 for packing; meanwhile, when all the dried salt in the first hopper 52 is transported to the second hopper 53, the fourth discharge valve 5221 is triggered to close and the fifth regulating valve 5111 is triggered to open to the eighth preset opening, and the dried salt in the silo 51 can enter the first hopper 52 through the fourth pipeline 511 for weighing again.

[0059] In addition, during the above process, when the first weighing module 311 on the thickener 3 detects that the weight of the industrial salt solution in the thickener 3 is higher than the first preset weight or the ammeter 3121 on the thickener 3 detects that the current of the stirring motor 312 of the thickener 3 is higher than the preset current, the first regulating valve 211 is triggered to decrease the opening degree and the first reflux valve 221 and the third discharge valve 3212 are triggered to increase the opening degree; and when the current of the stirring motor 312 is higher than the preset current, the stirring motor 312 is triggered to increase the rotation speed. When the first weighing module 311 on the thickener 3 detects that the weight of the industrial salt solution in the thickener 3 is lower than the first preset weight or the ammeter 3121 on the thickener 3 detects that the current of the stirring motor 312 of the thickener 3 is lower than the preset current, the first regulating valve 211 is triggered to increase the opening degree and the first reflux valve 221 and the third discharge valve 3212 are triggered to decrease the opening degree; and when the current of the stirring motor 312 is lower than the preset current, the stirring motor 312 is triggered to decrease the rotation speed.

[0060] When the opening time of the first blanking valve 111 reaches the first preset blanking time, trigger the first blanking valve 111 to close and the first regulating valve 211 and the first reflux valve 221 to reduce their opening degrees, and trigger the first cleaning valve 1211, the second cleaning valve 1221 and the second reflux valve 1231 to open; when the flushing time reaches the first preset flushing time, trigger the first blanking valve 111 to open and the first cleaning valve 1211, the second cleaning valve 1221 and the second reflux valve 1231 to close, and sequentially trigger the first regulating valve 211 to increase to the first preset opening degree and the first reflux valve 221 to increase to the second preset opening degree.

[0061] When the opening times of the second blanking valve 3211 and the third blanking valve 3212 reach the second preset blanking time, trigger the second blanking valve 3211 to close and the conveyor 42 to reverse, and trigger the third cleaning valve 331 and the third blanking valve 3212 to increase their opening degrees and the fourth cleaning valve 341 and the discharge valve 4111 to open; when the flushing time reaches the second preset flushing time, trigger the fourth cleaning valve 341 to close, trigger the third cleaning valve 331 to reduce to the fourth preset opening degree and the third blanking valve 3212 to reduce to the third preset opening degree, and then trigger the second blanking valve 3211 to open and the conveyor 42 to rotate forward, and trigger the discharge valve 4111 to close.

[0062] In summary, the automatic salt discharging device provided by the present utility model has the following advantages: The automatic salt discharging device provided by the present utility model includes: an evaporation crystallizer, a transfer pump, a thickener, a centrifugal drying unit, and a packing unit; the discharge port of the evaporation crystallizer is connected to the inlet of the transfer pump through a first pipeline, a concentration monitor is arranged in the evaporation crystallizer, and a first discharging valve is arranged on the first pipeline; the outlet of the transfer pump is connected to the inlet of the thickener through a second pipeline, and a first reflux pipeline connected to the evaporation crystallizer is arranged on the second pipeline; a first reflux valve is arranged on the first reflux pipeline; a first regulating valve is arranged on the second pipeline between the thickener and the first reflux pipeline; a detection and stirring execution unit is arranged on the thickener; the discharge port of the thickener is connected to the inlet of the centrifugal drying unit through a third pipeline, and a feeding adjustment unit is arranged on the third pipeline; the centrifugal drying unit is configured to sequentially perform centrifugal separation treatment and drying treatment on the material output by the thickener, and convey the dried material obtained after the treatment to the packing unit; the packing unit is configured to perform packing treatment on the dried material; the automatic salt discharging device is configured to trigger the opening of the first discharging valve and the transfer pump, and when the concentration monitor detects that the material concentration in the evaporation crystallizer reaches a preset concentration, trigger the first regulating valve to open to a first preset opening degree; and when the target parameter detected by the detection and stirring execution unit meets a first preset condition, trigger the first regulating valve to adjust the opening degree and the first reflux valve to open to a second preset opening degree, and after triggering the centrifugal drying unit to start, then trigger the feeding adjustment unit to start and the packing unit to start; and according to the target parameter detected by the detection and stirring execution unit, trigger the first regulating valve, the first reflux valve, and the feeding adjustment unit to adjust the opening degree. Thus, the automatic salt discharging device provided by the present utility model can monitor the material concentration in the evaporation crystallizer by arranging a concentration monitor in the evaporation crystallizer. By arranging a first discharging valve on the first pipeline between the evaporation crystallizer and the transfer pump and a first regulating valve on the second pipeline between the transfer pump and the thickener, when discharging salt, the first discharging valve and the transfer pump can be triggered to open, and when the material concentration in the evaporation crystallizer reaches a preset concentration, the first regulating valve can be triggered to open to a first preset opening degree, so that the material in the evaporation crystallizer can be automatically output to the thickener. By arranging a first reflux pipeline connected to the evaporation crystallizer on the second pipeline and a first reflux valve on the first reflux pipeline, a basis is laid for adjusting the feeding amount of the thickener. By arranging a detection and stirring execution unit on the thickener, when the target parameter detected by the detection and stirring execution unit meets a first preset condition, the first regulating valve can be triggered to adjust the opening degree and the first reflux valve can be opened to a second preset opening degree, so that the feeding amount of the thickener can be automatically adjusted; and the centrifugal drying unit can be triggered to start, so that the humidity in the centrifugal drying unit can be reduced.Further, by providing a blanking adjustment unit on the third pipeline between the thickener and the centrifugal drying unit, after triggering the start of the centrifugal drying unit, triggering the blanking adjustment unit and the packing unit to start can avoid the increase in the water content of the material entering the centrifugal drying unit, thereby improving the stability of the centrifugal drying unit. In addition, according to the target parameters detected by the detection stirring execution unit, the first regulating valve, the first reflux valve and the blanking adjustment unit can be triggered to adjust the opening degree, so that the automatic salt discharging device can discharge salt stably. The automatic salt discharging device provided by the utility model can automatically control the processes of industrial salt solution dehydration, drying and packing, thereby reducing the frequent operations of on-site operators and improving the work efficiency.

[0063] Further, the automatic salt discharging device further includes a first cleaning assembly, and the first cleaning assembly includes a first cleaning pipeline provided with a first cleaning valve, a second cleaning pipeline provided with a second cleaning valve, and a second reflux pipeline provided with a second reflux valve; the first cleaning pipeline is arranged on the first pipeline between the evaporation crystallizer and the first blanking valve, and the second cleaning pipeline is arranged on the first pipeline between the first blanking valve and the transfer pump; the first end of the second reflux pipeline is arranged on the second pipeline between the transfer pump and the first reflux pipeline, and the second end of the second reflux pipeline is arranged on the first pipeline between the first blanking valve and the transfer pump; the automatic salt discharging device is configured to, when the opening time of the first blanking valve reaches a first preset blanking time, trigger the first blanking valve to close and the first regulating valve and the first reflux valve to reduce the opening degree, and trigger the first cleaning valve, the second cleaning valve and the second reflux valve to open; and when the flushing time reaches a first preset flushing time, trigger the first blanking valve to open and the first cleaning valve, the second cleaning valve and the second reflux valve to close, and sequentially trigger the first regulating valve to increase to the first preset opening degree and the first reflux valve to increase to the second preset opening degree. Thus, the automatic salt discharging device provided by the utility model lays a good foundation for automatically cleaning the first pipeline by arranging the first cleaning pipeline and the second cleaning pipeline on the first pipeline, with the first cleaning valve arranged on the first cleaning pipeline and the second cleaning valve arranged on the second cleaning pipeline; by arranging the second reflux pipeline with the second reflux valve arranged thereon, and setting the first end of the second reflux pipeline on the second pipeline between the transfer pump and the first reflux pipeline and the second end of the second reflux pipeline on the first pipeline between the first blanking valve and the transfer pump, a good foundation for automatically cleaning the transfer pump is laid. Further, when the opening time of the first blanking valve reaches the first preset blanking time, the first blanking valve can be triggered to close and the first regulating valve and the first reflux valve can be triggered to reduce the opening degree, and the first cleaning valve, the second cleaning valve and the second reflux valve can be triggered to open, so that the first pipeline and the transfer pump can be automatically cleaned; when the flushing time reaches the first preset flushing time, the first blanking valve can be triggered to open and the first cleaning valve, the second cleaning valve and the second reflux valve can be triggered to close, and the first regulating valve can be sequentially triggered to increase to the first preset opening degree and the first reflux valve to increase to the second preset opening degree, so that when the flushing of the first pipeline and the transfer pump is completed, the material can be automatically restored to be conveyed to the thickener.

[0064] Furthermore, the detection and stirring execution unit includes a first weighing module and a stirring motor. The first weighing module is used to detect the weight of the material in the thickener. An ammeter is provided on the stirring motor, and the ammeter is used to detect the current of the stirring motor. The target parameters include the weight of the material in the thickener and the current of the stirring motor. The automatic salt discharging device is configured to trigger the stirring motor to increase the rotation speed when the current detected by the ammeter is higher than the preset current; and trigger the stirring motor to decrease the rotation speed when the current detected by the ammeter is lower than the preset current. Thus, the automatic salt discharging device provided by the present utility model can automatically adjust the feeding amount and discharging amount of the thickener by detecting the weight of the material in the thickener through the first weighing module and the current of the stirring motor through the ammeter, so as to achieve stable salt discharging.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model.

Claims

1. An automatic salt discharging device, characterized in that: include: Evaporation crystallizer, transfer pump, thickener, centrifugal drying unit and packaging unit; The discharge port of the evaporation crystallizer is connected to the inlet of the transfer pump through a first pipeline, a concentration monitor is provided in the evaporation crystallizer, and a first discharge valve is provided on the first pipeline; The outlet of the transfer pump is connected to the feed port of the thickener through a second pipeline, and a first reflux pipeline connected to the evaporation crystallizer is provided on the second pipeline; a first reflux valve is provided on the first reflux pipeline; and a first regulating valve is provided on the second pipeline between the thickener and the first reflux pipeline; The thickener is provided with a detection and stirring execution unit; the discharge port of the thickener is connected to the feed port of the centrifugal drying unit through a third pipeline, and the third pipeline is provided with a material discharge adjustment unit; The centrifugal drying unit is configured to sequentially centrifuge and dry the material output from the thickener, and transport the dried material obtained after the treatment to the packaging unit; The packaging unit is configured to package the dry material; The automatic salt discharging device is configured to trigger the first discharge valve and the material transfer pump to open, and when the concentration monitor detects that the material concentration in the evaporation crystallizer reaches a preset concentration, trigger the first regulating valve to open to a first preset opening; And when the target parameter detected by the detection and stirring execution unit meets the first preset condition, the first regulating valve is triggered to adjust the opening and the first reflux valve is triggered to open to the second preset opening, and after the centrifugal drying unit is triggered to open, the material discharge regulating unit and the packaging unit are triggered to open; and according to the target parameter detected by the detection and stirring execution unit, the first regulating valve, the first reflux valve and the material discharge regulating unit are triggered to adjust the opening.

2. The automatic salt dispensing device according to claim 1, characterized in that: A flow meter is also provided on the second pipe between the thickener and the first reflux pipe, and the flow meter is located at the inlet end of the first regulating valve; the automatic salt discharging device is configured to trigger the first regulating valve to increase the opening and the first reflux valve to decrease the opening when the flow rate detected by the flow meter is lower than the preset flow rate; And when the flow rate detected by the flow meter is higher than the preset flow rate, the first regulating valve is triggered to reduce the opening degree and the first return valve is triggered to increase the opening degree.

3. The automatic salt dispensing device according to claim 1, characterized in that: The automatic salt discharging device also includes a first cleaning component, which includes a first cleaning pipeline provided with a first cleaning valve, a second cleaning pipeline provided with a second cleaning valve, and a second reflux pipeline provided with a second reflux valve; the first cleaning pipeline is arranged on the first pipeline between the evaporation crystallizer and the first unloading valve, and the second cleaning pipeline is arranged on the first pipeline between the first unloading valve and the transfer pump; the first end of the second reflux pipeline is arranged on the second pipeline between the transfer pump and the first reflux pipeline, and the second end of the second reflux pipeline is arranged on the first pipeline between the first unloading valve and the transfer pump; The automatic salt discharging device is configured to, when the opening time of the first discharge valve reaches a first preset discharge time, trigger the first discharge valve to close and the first regulating valve and the first reflux valve to reduce their openings, and trigger the first cleaning valve, the second cleaning valve and the second reflux valve to open; and when the flushing time reaches a first preset flushing time, trigger the first discharge valve to open and the first cleaning valve, the second cleaning valve and the second reflux valve to close, and sequentially trigger the first regulating valve to increase to the first preset opening and the first reflux valve to increase to the second preset opening.

4. The automatic salt dispensing device according to claim 1, characterized in that: The detection and stirring execution unit includes a first weighing module and a stirring motor, wherein the first weighing module is used to detect the weight of the material in the thickener, and the stirring motor is provided with an ammeter, and the ammeter is used to detect the current of the stirring motor; the target parameters include the weight of the material in the thickener and the current of the stirring motor; the automatic salt discharging device is configured to trigger the stirring motor to increase the speed when the current detected by the ammeter is higher than a preset current; And when the current detected by the ammeter is lower than the preset current, the stirring motor is triggered to reduce the rotation speed.

5. The automatic salt dispensing device according to claim 4, characterized in that: The automatic salt discharging device is configured to trigger the first regulating valve, the first reflux valve and the material discharging regulating unit to adjust the opening according to the target parameter detected by the detection and stirring execution unit, including: The automatic salt-discharging device is configured to, when the weight of the material in the thickener reaches a first preset weight, trigger the first regulating valve to reduce its opening and the first reflux valve to open to the second preset opening; and when the weight of the material in the thickener is higher than the first preset weight or the current of the stirring motor is higher than the preset current, trigger the first regulating valve to reduce its opening and the first reflux valve to increase its opening; and when the weight of the material in the thickener is lower than the first preset weight or the current of the stirring motor is lower than the preset current, trigger the first regulating valve to increase its opening and the first reflux valve to reduce its opening.

6. The automatic salt dispensing device according to claim 5, characterized in that: The unloading regulating unit comprises a second unloading valve and a third unloading valve, and the automatic salt discharging device is configured to trigger the second unloading valve to open and the third unloading valve to open to a third preset opening when the weight of the material in the thickener reaches the first preset weight; and trigger the third unloading valve to increase its opening when the weight of the material in the thickener is higher than the first preset weight or the current of the stirring motor is higher than the preset current; And when the weight of the material in the thickener is lower than the first preset weight or the current of the stirring motor is lower than the preset current, the third discharge valve is triggered to reduce the opening.

7. The automatic salt dispensing device according to claim 6, characterized in that: The third pipeline between the thickener and the second discharge valve is connected to a third cleaning pipeline, and a third cleaning valve is provided on the third cleaning pipeline; the third pipeline between the second discharge valve and the third discharge valve is connected to a fourth cleaning pipeline, and a fourth cleaning valve is provided on the fourth cleaning pipeline; the automatic salt discharging device is configured to trigger the third cleaning valve to open to a fourth preset opening when the second discharge valve is triggered to open; When the opening time of the second unloading valve and the third unloading valve reaches a second preset unloading time, the second unloading valve is triggered to close and the conveyor in the centrifugal drying unit is reversed, and the third cleaning valve and the third unloading valve are triggered to increase their openings and the fourth cleaning valve and the discharge valve in the centrifugal drying unit are triggered to open; And when the flushing time reaches the second preset flushing time, the fourth cleaning valve is triggered to close, the third cleaning valve is triggered to decrease to the fourth preset opening, and the third unloading valve is triggered to decrease to the third preset opening, and then the second unloading valve is triggered to open and the conveyor rotates forward, and the discharge valve is triggered to close.

8. The automatic salt dispensing device according to claim 6, characterized in that: The centrifugal drying unit comprises a centrifuge, a conveyor, a drying device and an elevator connected in sequence, the discharge port of the thickener is connected to the feed port of the centrifuge through the third pipeline; the discharge port of the centrifuge is connected to a discharge pipeline, and a discharge valve is arranged on the discharge pipeline; the feed port of the drying device is provided with a first thermometer; the discharge port of the drying device is connected to the input end of the elevator, and the elevator is used to transport the dried material to the packaging unit; the automatic salt discharging device is configured to first trigger the conveyor to start and trigger the conveyor to reverse when the centrifugal drying unit is triggered to start; and then trigger the centrifuge, the drying device, the elevator and the discharge valve to start; When the temperature detected by the first thermometer reaches the preset inlet temperature and the centrifuge is turned on for a preset running time, the discharge valve is triggered to close and the conveyor is rotated forward, and the second discharge valve is triggered to open and the third discharge valve is triggered to open to the third preset opening; when the temperature detected by the first thermometer is higher than the preset inlet temperature, the third discharge valve is triggered to increase the opening, and when the temperature detected by the first thermometer is lower than the preset inlet temperature, the third discharge valve is triggered to decrease the opening.

9. The automatic salt dispensing device according to claim 8, characterized in that: The drying equipment is connected with a hot air blower, a cold air blower, an exhaust gas blower, a negative pressure gauge and a second thermometer; the hot air blower is connected to the hot air inlet of the drying equipment through a hot air duct, and a second regulating valve is provided on the hot air duct; the cold air blower is connected to the cold air inlet of the drying equipment through a cold air duct, and a third regulating valve is provided on the cold air duct; the exhaust gas blower is connected to the exhaust gas outlet of the drying equipment through an exhaust gas duct, and a fourth regulating valve is provided on the exhaust gas duct; the negative pressure gauge is used to detect the pressure in the drying equipment; the second thermometer is arranged at the discharge port of the drying equipment; the automatic salt discharging device is configured to trigger the hot air blower, the cold air blower and the exhaust gas blower to turn on when the drying equipment is triggered to turn on, and trigger the second regulating valve to open to the fifth preset opening, the third regulating valve to open to the sixth preset opening, and the fourth regulating valve to open to the seventh preset opening; and triggering the second regulating valve to adjust the opening according to the temperature detected by the first thermometer and the preset inlet temperature; According to the temperature detected by the second thermometer and the preset outlet temperature, the third regulating valve is triggered to adjust the opening; according to the pressure detected by the negative pressure gauge and the preset pressure, the fourth regulating valve is triggered to adjust the opening.

10. The automatic salt dispensing device according to claim 1, characterized in that: The packaging unit includes a silo, a first hopper, a second hopper and a baler, the feed port of the silo is connected to the output end of the centrifugal drying unit through a lifting pipeline, the discharge port of the silo is connected to the feed port of the first hopper through a fourth pipeline, and a fifth regulating valve is provided on the fourth pipeline; a second weighing module is provided on the first hopper, and the second weighing module is used to detect the weight of the material in the first hopper; the discharge port of the first hopper is connected to the feed port of the second hopper through a fifth pipeline, and a fourth discharge valve is provided on the fifth pipeline; the discharge port of the second hopper is connected to the baler through a sixth pipeline, and a fifth discharge valve is provided on the sixth pipeline; The automatic salt discharging device is configured to trigger the baler to start and the fifth regulating valve to open to an eighth preset opening after the centrifugal drying unit is turned on, so as to start baling the material; and in the baling process of the material, perform the following operations: According to the weight detected by the second weighing module and the second preset weight, the fifth regulating valve is triggered to adjust the opening; when the fifth regulating valve is triggered to close, the fourth discharge valve and the fifth discharge valve are triggered to open; when all the materials in the first hopper are transported to the second hopper, the fourth discharge valve is triggered to close and the fifth regulating valve is opened to the eighth preset opening.

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