Post-throwing liquid treatment system of mixed salt centrifugal machine
By introducing a COD modifier system into the salt mixing centrifuge system, the backswill liquid is processed and recycled back to the salt mixing system, the problem of difficult treatment of the drum dryer caused by the increase in the backswill liquid is solved, and the continuous operation of the centrifuge and waste reduction are achieved.
Patent Information
- Application Number
- CN202422133267.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The liquid after the salt mixing centrifuge increases, resulting in the drum dryer being unable to deal with it in time, resulting in a large amount of hazardous waste such as miscellaneous salt.
By setting up a COD modifier system, the redundant backswing liquid is processed using reaction tanks, dosing tanks and plate filters, and then the COD is removed and circulated back to the salt mixing system to avoid the burden of the drum dryer and ensure the continuous operation of the centrifuge.
It effectively reduces the generation of hazardous waste such as miscellaneous salt, ensures the continuous operation of the salt mixing centrifuge, and improves the treatment efficiency.
Smart Images
Figure CN223128288U_ABST
Abstract
Description
Technical Field:
[0001] The utility model relates to the technical field of water treatment, and particularly relates to a system for treating the liquid discharged after centrifugation of a mixed salt centrifuge. Background Art:
[0002] During the pretreatment of factory wastewater (brine), the water produced by the nanofiltration membrane (NF) enters the sodium chloride raw water tank. The sodium chloride raw water is heated by a plate heat exchanger and concentrated by a forced circulation evaporator. After the solid-liquid ratio appears, it is sent to a sodium chloride thickener for solid-liquid separation. After the discharge of the thickener, it enters a sodium chloride centrifuge for primary dehydration (water content ≤ 5%). After primary dehydration, it enters a fluidized bed for secondary dehydration (water content ≤ 0.5%). An air inlet is arranged at the top of the fluidized bed, and the main purpose is to ensure the continuous discharge of the high-temperature gas containing moisture after heat exchange between the inside of the fluidized bed and the material. The mother liquor continuously discharged from the three-effect of sodium chloride enters the mixed salt feed tank of the mixed salt system, enters the single-effect circulation concentration of the mixed salt in the mixed salt system, and then enters the mixed salt thickener and the mixed salt centrifuge for solid-liquid separation. The mixed salt enters the mixed salt dissolution tank and is dissolved into brine and returns to the pretreatment system.
[0003] The concentrated water of the nanofiltration membrane (NF) enters the sodium sulfate raw water tank. The sodium sulfate raw water is heated by a plate heat exchanger and concentrated by a forced circulation evaporator. After the solid-liquid ratio appears, it is sent to a mirabilite thickener for solid-liquid separation. After the discharge of the thickener, it enters a mirabilite centrifuge for primary dehydration, and then enters a sulfuric acid hot melt crystallizer, a sulfuric acid thickener, and a sulfuric acid centrifuge for solid-liquid separation, and undergoes secondary dehydration in a fluidized bed. An air inlet is also arranged at the top of the fluidized bed; the mother liquor continuously discharged from the three-effect of sodium sulfate enters the mixed salt feed tank of the mixed salt system, passes through the system of the single-effect of the mixed salt, the mixed salt thickener, and the mixed salt centrifuge, and finally the mixed salt enters the mixed salt dissolution tank and is dissolved into brine containing salt and returns to the pretreatment system.
[0004] In the above process, in order to remove COD in the mixed salt, a COD modifier system is set up separately. After removing part of the COD from the overflow water of the mixed salt thickener, it is sent back to the mixed salt system; secondly, in the mixed salt system, the liquid discharged after centrifugation of the mixed salt centrifuge will enter a drum dryer for drying.
[0005] However, during the long-term operation of the system, the liquid discharged after centrifugation of the mixed salt centrifuge increases, and the drum dryer cannot handle it in time, resulting in a large amount of hazardous waste such as miscellaneous salts being generated. Summary of the Utility Model:
[0006] The purpose of the utility model is to provide a system for treating the liquid discharged after centrifugation of a mixed salt centrifuge.
[0007] The utility model is implemented by the following technical solutions:
[0008] A post - centrifugation liquid treatment system for a mixed - salt centrifuge, comprising a mixed - salt centrifuge and a drum dryer. The post - centrifugation liquid outlet of the mixed - salt centrifuge is connected to the inlet of the drum dryer through a pipeline. It further includes a COD modifier system and a mixed - salt feed tank. A first valve is provided on the pipeline. The inlet of the COD modifier system is communicated with the pipeline between the first valve and the mixed - salt centrifuge through a second valve. The outlet of the COD modifier system is connected to the inlet of the mixed - salt feed tank.
[0009] Preferably, the COD modifier system includes a reaction tank, a chemical dosing tank, and a plate filter. The inlet of the reaction tank is the inlet of the COD modifier system. The outlet of the reaction tank is connected to the inlet of the plate filter. The outlet of the plate filter is the outlet of the COD modifier system. The outlet of the chemical dosing tank is connected to the chemical inlet of the reaction tank.
[0010] Advantages of the present utility model: The amount of post - centrifugation liquid of the mixed - salt centrifuge increases. By controlling the opening degree of the first valve, the redundant mixed - salt water, except for that sent to the drum dryer for treatment, is sent to the COD modifier system. After removing COD, it returns to the mixed - salt feed tank of the mixed - salt system and is recycled in the mixed - salt system, avoiding the situation that the drum dryer cannot handle it in time, ensuring the continuous operation of the mixed - salt centrifuge, and reducing the generation of hazardous wastes such as miscellaneous salts. Description of the drawings:
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0013] In the figure: mixed - salt centrifuge 1, drum dryer 2, COD modifier system 3, reaction tank 3.1, chemical dosing tank 3.2, plate filter 3.3, mixed - salt feed tank 4, pipeline 5, first valve 6, second valve 7. Detailed implementation manners:
[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0015] As Figure 1 shown, a treatment system for the centrifuged liquid after spinning of a mixed salt centrifuge includes a mixed salt centrifuge 1 and a drum dryer 2. The outlet of the centrifuged liquid after spinning of the mixed salt centrifuge 1 is connected to the inlet of the drum dryer 2 through a pipeline 5. It also includes a COD modifier system 3 and a mixed salt feed tank 4. A first valve 6 is provided on the pipeline 5. The inlet of the COD modifier system 3 is communicated with the pipeline 5 between the first valve 6 and the mixed salt centrifuge 1 through a second valve 7. The outlet of the COD modifier system 3 is connected to the inlet of the mixed salt feed tank 4.
[0016] By controlling the opening degree of the first valve 6, the amount of the centrifuged liquid after spinning of the mixed salt centrifuge 1 entering the drum dryer 2 is controlled. By controlling the opening degree of the second valve 7, the redundant centrifuged liquid after spinning enters the COD modifier system 3. After removing COD following the system, it returns to the mixed salt feed tank 4 of the mixed salt system for cyclic treatment, avoiding the situation that the drum dryer cannot process in time and ensuring the continuous operation of the mixed salt centrifuge 1.
[0017] The COD modifier system 3 includes a reaction tank 3.1, a chemical dosing tank 3.2, and a plate filter 3.3. The inlet of the reaction tank 3.1 is the inlet of the COD modifier system 3. The outlet of the reaction tank 3.1 is connected to the inlet of the plate filter 3.3. The outlet of the plate filter 3.3 is the outlet of the COD modifier system 3. The outlet of the chemical dosing tank 3.2 is connected to the chemical agent inlet of the reaction tank 3.1.
[0018] The chemical dosing tank 3.2 contains a COD adsorption modifier, which is put into the reaction tank 3.1 to react with the mixed brine. Then it is filtered by the plate filter 3.3 to remove COD, and the remaining brine enters the mixed salt feed tank 4.
[0019] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A post - centrifugation liquid treatment system for a mixed - salt centrifuge, comprising a mixed - salt centrifuge and a drum dryer. The outlet of the post - centrifugation liquid of the mixed - salt centrifuge is connected to the inlet of the drum dryer through a pipeline, and is characterized in that, It further includes a COD modifier system and a mixed salt feed tank. A first valve is provided on the pipeline. The pipeline between the first valve and the mixed salt centrifuge is communicated with the inlet of the COD modifier system through a second valve, and the outlet of the COD modifier system is connected to the inlet of the mixed salt feed tank.
2. The post - centrifugation liquid treatment system of a mixed - salt centrifuge according to claim 1, wherein: The COD modifier system includes a reaction tank, a chemical dosing tank, and a plate filter. The inlet of the reaction tank is the inlet of the COD modifier system. The outlet of the reaction tank is connected to the inlet of the plate filter, and the outlet of the plate filter is the outlet of the COD modifier system; the outlet of the chemical dosing tank is connected to the chemical agent inlet of the reaction tank.