Solid-liquid separation device for silicon nitride grinding wastewater
By designing a solid-liquid separation device for silicon nitride grinding wastewater, and utilizing the collaborative work and automated control of multiple devices, the problem of difficulty in treating silicon nitride grinding wastewater and waste of resources has been solved, and efficient solid-liquid separation and resource utilization have been achieved. Reuse reduces production costs and carbon emissions.
Patent Information
- Application Number
- CN202420923459.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The treatment of silicon nitride grinding wastewater is difficult, and there is a lack of effective solid-liquid separation methods. The recovery rate of silicon nitride powder is low, resulting in serious waste of water resources.
A separate device of a silicon nitride grinding and cutting waste water solid fluid, including solid fluid separation tank, silicon nitride powder collector, gas mixer, air compressor, clear water reuse pump, silicon pump recovery pump, automatic pressure pressure pressure, automatic pressure pressure The filter and PLC control cabinet, through automated control and the collaboration of multiple equipment, achieve efficient solid solid solid solid separation and resource recovery.
The efficient solid solid solution separation has been achieved, the recovery rate of silicon nitride powder is improved, water resources and raw materials are saved, the production cost and carbon emissions are reduced, the environment is protected, and the economic benefits and market competitiveness of the enterprise are improved.
Smart Images
Figure CN222384377U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of industrial wastewater treatment and resource utilization, and relates to a silicon nitride grinding wastewater solid-liquid separation device. Background Art
[0002] As an important ceramic material, silicon nitride occupies an indispensable position in today's industrial field. It is present in many key industries such as machinery, chemical industry, electronics, and military industry, providing strong support for the progress of modern science and technology. With the vigorous development of the silicon nitride production industry, an increasingly prominent environmental problem has also been placed before us - that is the challenge brought by wastewater discharge.
[0003] The grinding wastewater generated during the silicon nitride production process contains high-concentration silicon nitride powder and other solid particles. Due to their difficult biodegradation and complex composition, these substances may have adverse effects on water bodies and ecosystems once discharged into the natural environment. The silicon nitride powder and supernatant have certain reuse value, and direct discharge will cause a waste of resources. Therefore, the development of a device that effectively separates and reuses silicon nitride powder and supernatant in silicon nitride grinding wastewater is not only beneficial to protecting the ecological environment, but also has great significance for saving water and mineral resources, reducing corporate production costs and carbon emissions. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the utility model provides a silicon nitride grinding wastewater solid-liquid separation device to solve the technical problems of difficult treatment of traditional silicon nitride grinding wastewater, lack of complete solid-liquid separation means, low silicon nitride powder recovery rate, and serious waste of water resources, thereby realizing resource utilization.
[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0006] A silicon nitride grinding wastewater solid-liquid separation device, comprising a solid-liquid separation tank, a silicon nitride powder collector, a gas agitator, an air compressor, a clean water reuse pump, a silicon nitride powder recovery pump, an automatic filter press, and a PLC control cabinet; the solid-liquid separation tank is divided into two compartments, namely a wastewater tank and a clean water tank; the silicon nitride powder collector is arranged at the end of the wastewater tank in the solid-liquid separation tank, the wastewater tank is lined with a stainless steel bottom plate and slopes toward the silicon nitride powder collector at a slope of 10%; the gas agitator is arranged at the bottom of the wastewater tank, and the top of the gas outlet of the gas agitator is flush with the stainless steel bottom of the wastewater tank; the air compressor It is connected to the air inlet of the gas agitator through a pipeline; the clean water reuse pump is arranged at the bottom of the clean water tank in the solid-liquid separation tank; the silicon nitride powder recovery pump is arranged at the bottom of the silicon nitride powder collector and connected to the automatic filter press through a pipeline; the automatic filter press is arranged on the ground next to the silicon nitride powder collector and connected to the silicon nitride powder recovery pump through a pipeline; the PLC control cabinet is connected to the air compressor, the clean water reuse pump, the silicon nitride powder recovery pump, and the automatic filter press through a wireless network, and controls the start and stop and operating conditions of each equipment through flow, turbidity, liquid level, and mud level parameter signals.
[0007] The beneficial effects of the utility model are as follows: by monitoring and analyzing the water volume, turbidity, liquid level, mud level and other parameters of the grinding wastewater generated in the silicon nitride production process under the environment of the PLC control cabinet, and the automatic control device operates economically and reliably, efficient solid-liquid separation is achieved under water-saving and energy-saving conditions, and the purpose of green and low-carbon separation of silicon nitride powder and clean water and reuse them separately is achieved, the loss of silicon nitride raw materials and the consumption of water resources are reduced, resources are saved to the maximum extent, and the adverse effects of silicon nitride production wastewater on the environment are reduced, which is conducive to achieving near-zero emissions of silicon nitride production wastewater, reducing the production costs of enterprises, and improving the economic benefits and market competitiveness of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is a plan view of the solid-liquid separation device for silicon nitride grinding wastewater.
[0009] Figure 2 for Figure 1 Cross-sectional view of device 1-1.
[0010] Figure 3 for Figure 1 Cross-sectional view of device 2-2.
[0011] Figure 4 for Figure 1 Sectional view of device 3-3.
[0012] In the figure: 1-solid-liquid separation tank; 2-silicon nitride powder collector; 3-gas agitator; 4-air compressor; 5-clean water recycling pump; 6-silicon nitride powder recovery pump; 7-automatic filter press; 8-PLC control cabinet. DETAILED DESCRIPTION
[0013] The following is a further description in conjunction with this embodiment and the accompanying drawings.
[0014] See also Figure 1 A solid-liquid separation device for silicon nitride grinding wastewater includes a solid-liquid separation tank 1, a silicon nitride powder collector 2, a gas agitator 3, an air compressor 4, a clean water recycling pump 5, a silicon nitride powder recovery pump 6, an automatic filter press 7, a PLC control cabinet 8, and a silicon nitride powder collector 3 is arranged at the end of the wastewater tank in the solid-liquid separation tank 1, and the wastewater tank is lined with a stainless steel bottom plate and slopes toward the silicon nitride powder collector 2 at a slope of 10%. The gas agitator 3 is arranged at the bottom of the wastewater tank, and the top of the gas outlet of the gas agitator 3 is level with the stainless steel bottom of the wastewater tank. The air compressor 4 is connected to the air inlet of the gas agitator 3 through a pipeline. The clean water recycling pump 5 is arranged at the bottom of the clean water tank in the solid-liquid separation tank 1; the silicon nitride powder recovery pump 6 is arranged at the bottom of the silicon nitride powder collector 2 and connected to the automatic filter press 7 through a pipeline; the automatic filter press 7 is arranged on the ground adjacent to the silicon nitride powder collector 2, and is connected to the silicon nitride powder recovery pump 6 through a pipeline. The PLC control cabinet 8 is connected to the air compressor 4, the clean water reuse pump 5, the silicon nitride powder recovery pump 6, and the automatic filter press 7 through a wireless network, and intelligently controls the start and stop and operating conditions of each device through parameter signals such as flow, turbidity, liquid level, and mud level.
[0015] Solid-liquid separation and resource utilization workflow: Silicon nitride wastewater is discharged to the wastewater tank side of the solid-liquid separation tank 1 through the pipeline gravity flow. After a period of natural sedimentation, the upper clear water flows into the clear water tank side of the solid-liquid separation tank 1 through the overflow port, and is pressurized and reused to the silicon nitride grinding section in the factory through the clear water reuse pump 5, and is reused as grinding water replenishment. Due to the action of gravity, the silicon nitride powder precipitated on one side of the wastewater tank in the solid-liquid separation tank 1 is collected along the 10% slope of the tank bottom to the silicon nitride powder collector 2. When the sludge in the silicon nitride powder collector 2 accumulates to the set value, the PLC control cabinet 8 automatically controls the silicon nitride powder recovery pump 6 to start, and the silicon nitride powder sludge is lifted and transported to the automatic filter press 7 for dehydration. The dehydrated dry sludge can be reused as silicon nitride raw material, and the wastewater generated by dehydration enters the wastewater tank side of the solid-liquid separation tank 1 to continue solid-liquid separation and resource utilization. After the device has been running for a period of time, a part of silicon nitride powder will be compacted at the bottom of the solid-liquid separation tank 1. The PLC control cabinet 8 monitors the sludge concentration at the bottom of the tank. When the sludge compaction occurs, the air compressor 4 is automatically started to supply air to the gas agitator 3 through the pipeline, and the sludge in the compacted area is aerated and stirred at the bottom of the tank through the outlet of the gas agitator 3, so that the compacted sludge is activated and flows into the silicon nitride powder collector 2 along the slope of the tank bottom. By monitoring the turbidity and liquid level in the clear water tank of the solid-liquid separation tank 1, the PLC control cabinet 8 automatically controls the start and stop of the clear water reuse pump 5, the flow rate, and switching to the sewage discharge state. The entire process is carried out in an integrated closed system, so that the odor of the sludge, mud residue, and muddy water are completely isolated from the outside world, overcoming the adverse effects of traditional sewage sludge treatment processes on the surrounding environment. The efficient control of the PLC control cabinet 8 saves energy and labor costs, minimizes carbon emissions and operating costs, and the separated silicon nitride powder has high purity and low water content, which reduces the reuse cost. The separated clean water has low pollutant content and can be directly used to replenish the water used in the silicon nitride grinding section in the factory, saving a lot of production costs for the company.
Claims
1. A solid-liquid separation device for silicon nitride grinding wastewater, characterized in that: It includes a solid-liquid separation tank, a silicon nitride powder collector, a gas agitator, an air compressor, a clean water reuse pump, a silicon nitride powder recovery pump, an automatic filter press, and a PLC control cabinet; the solid-liquid separation tank is divided into two compartments, namely a wastewater tank and a clean water tank; the silicon nitride powder collector is arranged at the end of the wastewater tank in the solid-liquid separation tank, and the wastewater tank is lined with a stainless steel bottom plate and sloped toward the silicon nitride powder collector at a slope of 10%; the gas agitator is arranged at the bottom of the wastewater tank, and the top of the gas outlet of the gas agitator is flush with the stainless steel bottom of the wastewater tank; the air compressor is connected to the gas agitator through a pipeline The clean water recycling pump is arranged at the bottom of the clean water tank in the solid-liquid separation tank; the silicon nitride powder recovery pump is arranged at the bottom of the silicon nitride powder collector and is connected to the automatic filter press through a pipeline; the automatic filter press is arranged on the ground close to the silicon nitride powder collector and is connected to the silicon nitride powder recovery pump through a pipeline; the PLC control cabinet is connected to the air compressor, the clean water recycling pump, the silicon nitride powder recovery pump and the automatic filter press through a wireless network, and controls the start and stop and operating conditions of each equipment through flow, turbidity, liquid level and mud level parameter signals.