CN219709330U - Wastewater decyanation treatment system for coal coking plant - Google Patents
Wastewater decyanation treatment system for coal coking plant Download PDFInfo
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- CN219709330U CN219709330U CN202321333898.5U CN202321333898U CN219709330U CN 219709330 U CN219709330 U CN 219709330U CN 202321333898 U CN202321333898 U CN 202321333898U CN 219709330 U CN219709330 U CN 219709330U
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Abstract
The utility model discloses a wastewater decyanation treatment system of a coal coking plant, and aims to solve the technical problem that the existing coal coking wastewater decyanation efficiency is low. Including the neutralization pond, sedimentation tank, first force (forcing) pump, at least one mechanical filter, the second force (forcing) pump that are equipped with the agitator that correspond the pipe in proper order, cyanide-containing waste water is carried to in the neutralization pond through waste water conveying pipeline, just correspond in the waste water conveying pipeline and connect the medicament delivery pipeline that is used for decyanation medicament delivery, be equipped with medicament groove and charge pump in the medicament delivery pipeline. The wastewater decyanation treatment system has the advantages of high decyanation efficiency, strong purification capacity, stable and reliable working condition and the like.
Description
Technical Field
The utility model relates to the technical field of industrial wastewater treatment, in particular to a wastewater decyanation treatment system of a coal coking plant.
Background
Coal coking is a process in which coal is heated to a high temperature to decompose, produce coke, and produce additional industrial gas-liquid byproducts, which produce large amounts of organic and high ammonia nitrogen wastewater. In order to realize ammonia nitrogen treatment, an ammonia distillation process of coking wastewater is generally adopted to realize recycling of ammonia nitrogen resources, and ammonia distillation process can generate wastewater containing ammonia, and the wastewater also contains cyanide, benzene, phenols, polycyclic aromatic hydrocarbon and other harmful substances, so that the wastewater has certain harm to the environment and human health. In addition, crude benzene is a liquid byproduct formed during coke production and contains various organic substances such as ethylene glycol, which are separated during the treatment of crude benzene to form ethylene glycol wastewater, and the ethylene glycol wastewater generally contains organic substances such as benzene, toluene, ethylbenzene, xylene and inorganic substances such as cyanide, sulfate ions, iron, nickel, copper and the like.
Both ammonia distillation wastewater and glycol wastewater contain a certain amount of cyanide, and the cyanide is a toxic substance, which can damage the cell membrane of bacteria, destroy the intracellular structure of the bacteria and cause the interruption of chemical reactions inside the cells; in addition, cyanide can also inhibit bacterial cell respiration, so that biological cells die, and fungus in a biochemical water tank dies in wastewater treatment, so that the probability that COD and BOD are degraded and converted into biogas by anaerobic microorganisms is reduced, and the treatment difficulty of coal coking wastewater is increased.
The inventor knows a coking wastewater decyanation reagent and a method for treating coking wastewater (CN 115180736A), which realize the decyanation of coking wastewater through water treatment facilities such as a pH adjusting tank, a primary decyanation tank, a primary sedimentation tank, a secondary decyanation tank, a secondary sedimentation tank, a water outlet tank and the like. However, in the process of implementing the technical solution in the embodiment of the present utility model, the present inventors have found that at least the following technical problems exist in the above technology: the cyanide removal agent adopts manual throwing and stirring, and the wastewater adopts a two-stage sedimentation tank for natural sedimentation, so that the cyanide removal efficiency is low, and the requirement that a large amount of wastewater needs to be treated in time is difficult to meet.
The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art.
Disclosure of Invention
In view of at least one of the above technical problems, the present disclosure provides a wastewater decyanation treatment system for a coal coking plant, which aims to solve the technical problem that the existing coal coking wastewater decyanation efficiency is low and the production requirement is difficult to meet.
According to one aspect of the disclosure, there is provided a wastewater decyanation treatment system of a coal coking plant, which comprises a neutralization pond provided with a stirrer, a sedimentation pond, a first booster pump, at least one mechanical filter and a second booster pump which are sequentially communicated through pipelines, wherein cyanide-containing wastewater is conveyed into the neutralization pond through a wastewater conveying pipeline, and a medicament delivery pipeline for decyanation medicament delivery is correspondingly connected in the wastewater conveying pipeline, and a medicament tank and a medicament adding pump are arranged in the medicament delivery pipeline;
the top of the mechanical filter is correspondingly provided with a stirrer, the inside of the mechanical filter is filled with fiber balls attached with corresponding filtering medicaments, and a back flushing pipeline communicated to a water outlet of the mechanical filter is connected to a position corresponding to a downstream pipeline of the second booster pump; the upper part of the mechanical filter is provided with a back flushing sewage discharge pipeline communicated to the sludge tank.
In some embodiments of the disclosure, the wastewater delivery line, the medicament delivery line, the backwash line and the backwash blowdown line are provided with pipe valves.
In some embodiments of the disclosure, the sedimentation tank is a advection sedimentation tank.
In some embodiments of the disclosure, the decyanation agent is a water purifier.
In some embodiments of the disclosure, the neutralization tank and the sedimentation tank are provided with a sewage pipe at the bottom thereof, which is communicated to the sewage tank.
In some embodiments of the disclosure, a one-way valve is disposed between the first booster pump and the mechanical filter.
In some embodiments of the present disclosure, the fiber balls are attached with polyaniline high-molecular polymers.
In some embodiments of the disclosure, four mechanical filters are provided in series and then in parallel.
In some embodiments of the disclosure, the outlet of the second pressurizing pump is provided with two branches respectively connected to the filtering tank and the cyanide-containing wastewater tank, and the two branches are respectively provided with a pipe valve.
In some embodiments of the disclosure, a differential pressure meter is correspondingly arranged between the inlet and the outlet of the mechanical filter.
One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:
1. owing to set up medicament neutralization pond, sedimentation tank, first force (forcing) pump and mechanical filter, through medicament decyanation and filter filtration, can effectively get rid of the cyanide in the coking wastewater, and through pressure filtration, the treatment effeciency of improvement waste water that can be very big shortens waste water treatment time, solves the waste water treatment effeciency low and the problem that is difficult to satisfy the production demand that multistage nature precipitation leads to among the prior art.
2. The agitator is arranged in the neutralization tank to accelerate the mixing of the decyanation agent and the cyanide-containing wastewater, so that the decyanation agent and the cyanide-containing wastewater fully react, thereby being beneficial to improving the decyanation efficiency of the wastewater.
3. The stirrer at the top of the mechanical filter can drive the water body to move through stirring during the back flushing of the mechanical filter, so that the separation rate of filter residues is accelerated, and the back flushing effect is improved.
4. The one-way valve arranged between the first booster pump and the mechanical filter can effectively prevent the sewage generated by backflushing from flowing back through the first booster pump during backflushing, and ensure the stability and reliability of the decyanation system.
5. As the mechanical filter is filled with the fiber balls attached with the polyaniline high-molecular polymer, the secondary pollution of polyaniline to the water body can be avoided while the water filtering effect is ensured, thereby being beneficial to saving working procedures and improving the water filtering efficiency.
6. The mechanical filters are connected in parallel after being connected in series, and the filtering effect of the wastewater can be ensured through a plurality of mechanical filters connected in series; through the form of parallelly connected, can effectively promote the filtration efficiency of waste water impurity.
Drawings
FIG. 1 is a schematic diagram of a wastewater decyanation treatment system in a coal coking plant according to an embodiment of the present utility model.
In the figure, 1 is a neutralization tank, 11 is a neutralization tank stirrer, 2 is a sedimentation tank, 3 is a first booster pump, 4 is a mechanical filter, 5 is a second booster pump, 61 is a medicament tank, 62 is a medicament adding pump, and 7 is a back flushing pipeline.
Detailed Description
The terms "first," "second," and the like, herein do not denote any order or importance, but rather are used to distinguish one element from another. The terms "connected," "coupled," and "connected," as used herein, unless specifically indicated otherwise, are intended to encompass both direct and indirect connections (couplings).
The components, materials, and the like in the following examples are commercially available products unless otherwise specified.
In order to better understand the technical scheme of the present utility model, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The wastewater decyanation treatment system is used for removing cyanide in wastewater so as to meet emission standards.
Referring to fig. 1, the wastewater decyanation treatment system comprises a neutralization tank 1, a sedimentation tank 2, a first booster pump 3, a mechanical filter 4 and a second booster pump 5 which are communicated in sequence through pipelines.
Cyanide-containing wastewater generated in the treatment process of coking and additional products thereof is concentrated into a wastewater conveying pipeline, and the wastewater is conveyed into the neutralization tank 1 through the wastewater conveying pipeline for cyanide removal. In this example, in order to remove cyanide in the wastewater, a certain amount of decyanation agent needs to be added into the wastewater, and through a certain chemical reaction, the cyanide content in the wastewater is obviously reduced, so that the purpose of meeting relevant wastewater treatment standards is achieved. In this example, a commercial G-9 water purifier was used as a decyanation agent and added to cyanide-containing wastewater at a certain ratio. Wherein, consider adopting the manual work to throw and can lead to the increase of human cost, and there is the problem that the dose of throwing is influenced great by the human factor, so in this example, connect the medicament and put in the pipeline in the corresponding cyanide-containing waste water conveying pipeline of the upper reaches in neutralization pond 1, through waste water conveying pipeline and the medicament that parallel set up put in the pipeline, under the drive of waste water rivers, realize the effect that the medicament was evenly put in the cyanide-containing waste water. Specifically, referring to fig. 1, a medicament tank 61 and a dosing pump 62 are connected in the medicament delivery pipeline, the medicament tank 61 is a storage container for decyanation medicaments, corresponding decyanation solutions are manually configured and poured into a tank body of the medicament tank 61, an output port of the medicament tank 61 is connected to an inlet of the dosing pump 62 through a pipeline, and quantitative and uniform pumping of different doses of liquid medicaments is realized by adjusting operation parameters of the dosing pump 62; the outlet of the dosing pump 62 is connected to the waste water conveying pipeline through a ball valve and a one-way valve, so that the liquid medicine and the waste water are mixed. Wherein, the check valve between the outlet of the dosing pump 62 and the waste water conveying pipeline can effectively avoid the problem that cyanide-containing waste water flows backward into the medicament delivery pipeline when the waste water conveying pressure is overlarge, realize unidirectional delivery of medicament and ensure the stability and reliability of medicament delivery.
The cyanide-containing wastewater mixed with the decyanation agent is discharged into a neutralization tank 1, and the decyanation agent and the cyanide-containing wastewater fully react in the neutralization tank to form flocculates, so that the reduction of cyanide content is realized. In order to accelerate the reaction rate between the two and improve the treatment efficiency of cyanide-containing wastewater, in this embodiment, referring to fig. 1, a neutralization tank stirrer 11 is arranged in the neutralization tank 1, and the flow of water in the neutralization tank is accelerated by the neutralization tank stirrer 11, so that the decyanation agent and the cyanide-containing wastewater are fully mixed, and the gas generated after the reaction of the decyanation agent and the cyanide-containing wastewater is discharged, thereby accelerating the decyanation efficiency and improving the wastewater treatment safety.
After the decyanation agent and cyanide-containing wastewater are fully mixed and reacted in the neutralization tank, cyanide forms certain flocculate, so that the cyanide needs to be separated from the water body, in the embodiment, referring to fig. 1, a sedimentation tank 2 is arranged at the downstream of the neutralization tank 1, and in the embodiment, a advection sedimentation tank with stable working conditions is adopted for sedimentation of the flocculate. In addition, because a certain amount of flocculate is generated in the neutralization tank 1 and more flocculate is generated in the sedimentation tank 2, in order to avoid excessive sedimentation of the flocculate and influence the reaction and sedimentation efficiency, in the embodiment, the bottom positions of the neutralization tank 1 and the sedimentation tank 2 are respectively connected with a sewage pipe communicated with a sewage tank, and the sewage pipe is provided with a pipe valve, thereby, on one hand, the discharge of the sediment in the tank can be realized, and the workload and risk of manually entering the tank for cleaning during the stopping period are reduced; on the other hand, the water body in the tank can be conveniently emptied during the winter stopping. In addition, in the embodiment, the neutralization tank 1 and the sedimentation tank 2 are respectively provided with a liquid level meter so as to prevent water overflow caused by overlarge water inflow.
The wastewater without cyanide is obtained after precipitation in the sedimentation tank 2, but partial impurities still exist in the water body and cannot reach the treatment standard, but the sedimentation process needs a certain time in consideration of setting a secondary sedimentation tank to carry out impurity sedimentation, and the sedimentation tank occupies a larger area, so that on one hand, the investment of land and construction cost is overlarge; on the other hand, the long process of natural precipitation is unfavorable for improving the efficiency of wastewater treatment. Therefore, referring to fig. 1, in this embodiment, a mechanical filter 4 is provided to filter impurities, and fibrous balls attached with polyaniline high-molecular polymers are filled in the mechanical filter 4, so that the polyaniline high-molecular polymers realize impurity adsorption, and the fibrous balls are compounded with the polyaniline high-molecular polymers, so that secondary pollution of polyaniline to water can be avoided.
In this example a total of 4 mechanical filters 4 are provided, in other embodiments other numbers of at least one mechanical filter are provided. In the example, four filters are connected in series two by two and then connected in parallel, so that the mechanical filter 4 connected in series is used for realizing the multiple impurity filtering of the wastewater to improve the impurity filtering effect of the wastewater; the parallel mechanical filter is used for improving the wastewater treatment capacity, so that the wastewater treatment effect is improved, the treatment capacity can be increased, and the aim of improving the treatment efficiency is fulfilled. But howeverSince it is difficult to achieve efficient water treatment by the mechanical filter 4 only by means of the natural water pressure of the wastewater, a first pressurizing pump 3 is provided in the pipeline downstream of the sedimentation tank 2 and upstream of the mechanical filter 4, see fig. 1, in this case, a flow rate of 240m 3 And a pressure boosting pump with the lift of 20m, the rotating speed of 1450r/min and the power of 30KW is used for boosting the pressure of water entering the mechanical filter 4 through the pressurizing action of the first pressure boosting pump 3, so that the passing time of wastewater through the mechanical filter 4 is shortened, the water filtering efficiency is further improved, and the filtering of organic matters, cyanide floccules, metal ions, COD and the like in the water is realized.
After the wastewater enters the tank body of the mechanical filter 4 from the top of the mechanical filter 4 under the action of water pressure and gravity, the wastewater passes through a fiber ball layer filled in the mechanical filter 4 and attached with polyaniline high polymer, and flows out from a water outlet at the bottom of the mechanical filter 4 after the adsorption of impurities is realized, however, the impurities filtered out from the mechanical filter 4 can accumulate in the tank body of the filter along with the increase of working time, so that the wastewater passing efficiency is reduced, the water outlet pressure is reduced, the pressure difference between the water inlet pressure and the water outlet pressure is increased, and the problem of impurity accumulation in the mechanical filter 4 is accurately identified.
To achieve a cleaning of a large amount of impurities inside the mechanical filter 4 when the pressure difference is too large, in this embodiment a backwash line is provided. Specifically, referring to fig. 1, a second booster pump 5 is arranged at the downstream of the final water outlet collecting port of the mechanical filter 4, a back flushing pipeline 7 communicated with the water outlet of each mechanical filter 4 is connected to the corresponding position in the downstream pipeline of the second booster pump, and the back flushing pipeline is provided with a pipe valve for controlling the opening and closing of the pipeline. In the back flushing process of the mechanical filter 4, the filtered water body is pressurized secondarily by the pressurizing action of the second pressurizing pump 5, a pipe valve in the back flushing pipeline 7 is opened, the secondarily pressurized water body is conveyed to a water inlet of the mechanical filter 4 through the back flushing pipeline 7, the fiber ball filter layer in the mechanical filter 4 is reversely flushed, impurities are flushed to the upper layer of the mechanical filter, and the impurities are discharged to a sludge pond through a back flushing sewage discharging pipeline at the upper part of the mechanical filter 4, so that the impurities in the mechanical filter 4 are cleaned. In addition, in order to avoid backflow of the backflushing water body to the first booster pump 3 through the water inlet of the mechanical filter 4 during backflushing, for this purpose, referring to fig. 1, a one-way valve is provided between the first booster pump 3 and the mechanical filter 4, thereby avoiding backflow problems. In addition, in order to further promote the back flush effect, in this embodiment, the electric stirrer is installed at the top of mechanical filter 4, through the stirring effect of agitator, increases rivers power, accelerates the motion of impurity, promotes the cleaning performance of impurity. When the differential pressure of the mechanical filter is overlarge, a back flushing line is opened to perform back flushing for at least 30min, so that the mechanical filter is ensured to recover good filtering effect.
In addition, the outlet of the second booster pump 5 is provided with two branches which are respectively and correspondingly connected to the filtering pond and the cyanide-containing wastewater pond, and the two branches are respectively provided with pipe valves. And detecting the water discharged from the downstream of the second booster pump 5, if the water quality is clear and qualified, conveying the water to the filter tank through the corresponding branch, otherwise conveying the unqualified water to the wastewater tank through the other branch for treatment again, adjusting the dosage of the medicament, and ensuring the wastewater treatment effect.
While certain preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The wastewater decyanation treatment system of the coal coking plant is characterized by comprising a neutralization pond, a sedimentation pond, a first booster pump, at least one mechanical filter and a second booster pump which are communicated sequentially through a pipeline, wherein cyanide-containing wastewater is conveyed into the neutralization pond through a wastewater conveying pipeline, a medicament delivery pipeline for decyanation medicament delivery is correspondingly connected in the wastewater conveying pipeline, and a medicament tank and a medicament adding pump are arranged in the medicament delivery pipeline;
the top of the mechanical filter is correspondingly provided with a stirrer, the inside of the mechanical filter is filled with fiber balls attached with corresponding filtering medicaments, and a back flushing pipeline communicated to a water outlet of the mechanical filter is connected to a position corresponding to a downstream pipeline of the second booster pump; the upper part of the mechanical filter is provided with a back flushing sewage discharge pipeline communicated to the sludge tank.
2. The wastewater decyanation treatment system of a coal coking plant according to claim 1, wherein the wastewater conveying pipeline, the medicament delivery pipeline, the back flush pipeline and the back flush blowdown pipeline are respectively provided with a pipe valve.
3. The wastewater decyanation treatment system of a coal coking plant of claim 1, wherein the sedimentation tank is a advection sedimentation tank.
4. The wastewater decyanation treatment system of claim 1, wherein said decyanation agent is water purifier king.
5. The wastewater decyanation treatment system of coal coking plants according to claim 1, wherein the neutralization tank and the sedimentation tank are provided with sewage pipes at the bottoms thereof which are communicated to the sewage tank.
6. The wastewater decyanation treatment system of claim 1, wherein a one-way valve is provided between said first booster pump and said mechanical filter.
7. The wastewater decyanation treatment system of claim 1, wherein said fiber balls are attached with polyaniline polymer.
8. The wastewater decyanation treatment system of a coal coking plant according to claim 1, wherein four mechanical filters are arranged in series and then in parallel.
9. The wastewater decyanation treatment system of a coal coking plant according to claim 1, wherein the outlet of the second pressurizing pump is provided with two branches which are respectively and correspondingly connected to the filtering pond and the cyanide-containing wastewater pond, and the two branches are respectively provided with a pipe valve.
10. The wastewater decyanation treatment system of the coal coking plant according to claim 1, wherein a differential pressure meter is correspondingly arranged between an inlet and an outlet of the mechanical filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321333898.5U CN219709330U (en) | 2023-05-30 | 2023-05-30 | Wastewater decyanation treatment system for coal coking plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321333898.5U CN219709330U (en) | 2023-05-30 | 2023-05-30 | Wastewater decyanation treatment system for coal coking plant |
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| CN219709330U true CN219709330U (en) | 2023-09-19 |
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| CN202321333898.5U Active CN219709330U (en) | 2023-05-30 | 2023-05-30 | Wastewater decyanation treatment system for coal coking plant |
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| CN (1) | CN219709330U (en) |
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- 2023-05-30 CN CN202321333898.5U patent/CN219709330U/en active Active
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