CN212451024U - Coking desulfurization waste liquid treatment system - Google Patents
Coking desulfurization waste liquid treatment system Download PDFInfo
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- CN212451024U CN212451024U CN202020397666.6U CN202020397666U CN212451024U CN 212451024 U CN212451024 U CN 212451024U CN 202020397666 U CN202020397666 U CN 202020397666U CN 212451024 U CN212451024 U CN 212451024U
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Abstract
The utility model relates to a processing system of coking desulfurization waste liquid belongs to the waste water treatment field. The system comprises an ammonia still, an oil removal tank and an air floatation tank which are connected in sequence along the circulation path of the desulfurization waste liquid; the air floating tank is divided into an air floating reaction zone and an air floating separation zone, the water outlet of the air floating reaction zone is connected with the water inlet of the air floating separation zone, the water outlet of the air floating separation zone is respectively connected with an accident tank and a subsequent treatment facility, and the water outlet of the accident tank is connected with the water inlet of the ammonia still. The system utilizes the ammonia still to remove most of cyanide and utilizes the oil removal tank to remove heavy oil and light oil so as to reduce the dosage of the subsequent cyanogen removing agent and improve the cyanogen removing effect; the air floatation tank can effectively separate solid and liquid of products which are not easy to precipitate. The system is simple in composition, and can effectively solve the problems of low cyanide removal rate and high operation cost in the coking desulfurization waste liquid.
Description
Technical Field
The utility model belongs to the waste water treatment field, concretely relates to processing system of coking desulfurization waste liquid.
Background
The coking desulfurization waste liquid is high-concentration industrial waste water which is generated in the purification process of coke oven gas and contains various toxic and harmful substances. Wherein high concentrations of COD, sulfides and ammonia nitrogen (COD >100000mg/L, sulfides >2000mg/L, ammonia nitrogen >20000mg/L) and highly toxic substances such as cyanides render the wastewater not directly amenable to biochemical treatment.
At present, the common treatment method of the coking desulfurization waste liquid mainly comprises the following steps: gravity separation, adsorption, membrane, electrochemical, biochemical, and the like. The gravity separation method has no great effect on removing dissolved pollutants, so the gravity separation method is generally only used for pretreatment of desulfurization waste liquid; the adsorption method and the membrane method have good treatment effect, but have high cost and limit the application in practical production; the electrochemical method is divided into an indirect oxidation method and a direct oxidation method, and is difficult to be suitable for industrial production due to the influences of small effective electrode area, low mass transfer efficiency and the like; the biochemical method can not directly treat the coking desulfurization waste liquid because the coking desulfurization waste liquid contains more toxic and refractory organic matter components.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a processing system of coking desulfurization waste liquid to solve the problem that cyanide clearance is low, the working costs is high in the present coking desulfurization waste liquid.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a treatment system for coking desulfurization waste liquid comprises an ammonia still, an oil removal tank and an air floatation tank which are sequentially connected along a desulfurization waste liquid circulation path; the air floating tank is divided into an air floating reaction zone and an air floating separation zone, the water outlet of the air floating reaction zone is connected with the water inlet of the air floating separation zone, the water outlet of the air floating separation zone is respectively connected with an accident tank and a subsequent treatment facility, and the water outlet of the accident tank is connected with the water inlet of the ammonia still.
Furthermore, a mud bucket is arranged at the bottom of the oil removal tank, and a slag scraper is arranged at the upper part of the tank body.
Further, a stirrer or a gas stirring device is arranged in the air floatation reaction area of the air floatation tank.
Further, a decyanation agent feeding device is arranged above the air floatation reaction area of the air floatation tank.
Further, a cyanide concentration detector is arranged at a water outlet of the air floatation separation area of the air floatation tank.
Further, the oil removal tank is an integrated oil separation tank.
Furthermore, the water outlet of the accident pool is connected with the water inlet of the oil removing pool.
The beneficial effects of the utility model reside in that:
the treatment system utilizes the ammonia still to remove most cyanide, the effluent of the ammonia still enters an integrated oil removal facility to remove heavy oil and light oil, the dosage of a subsequent cyanogen removing agent is reduced, and the cyanogen removing effect is improved; the air floatation tank can effectively separate solid and liquid of products which are not easy to precipitate. The system is simple in composition, and can effectively solve the problems of low cyanide removal rate and high operation cost in the coking desulfurization waste liquid.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of the system of the present invention.
Reference numerals:
ammonia still 1, deoiling pond 2, air supporting reaction zone 3, air supporting separation zone 4, accident pond 5, follow-up processing facility 6.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1, a system for treating coking desulfurization waste liquid comprises an ammonia still 1, an oil removal tank 2 and an air flotation tank which are connected in sequence along a desulfurization waste liquid circulation path; the air flotation tank is divided into an air flotation reaction zone 3 and an air flotation separation zone 4, a water inlet of the air flotation reaction zone 3 is connected with a water outlet of the oil removal tank 2, a water outlet of the air flotation reaction zone 3 is connected with a water inlet of the air flotation separation zone 4, a water outlet of the air flotation separation zone 4 is respectively connected with an accident tank 5 and a subsequent treatment facility 6, and a water outlet of the accident tank 5 is connected with a water inlet of the ammonia still 1.
The treatment system utilizes the ammonia still, the desulfurization waste liquid and the residual ammonia water are discharged into the ammonia still 1, most cyanide can be evaporated, and the effluent water discharged from the ammonia still 1 enters the oil removal tank 2 to remove heavy oil and light oil, so that the dosage of the subsequent cyanogen removing agent can be reduced, and the cyanogen removing effect is improved. The effluent of the oil removal tank 2 enters the air flotation tank again, a decyanation agent adding device is arranged above an air flotation reaction zone of the air flotation tank, the waste liquid is decyanated by adding the decyanation agent, and then the waste liquid enters the air flotation separation zone 4 for solid-liquid separation, and the air flotation separation zone 4 can effectively carry out solid-liquid separation on the product which is not easy to precipitate. And finally, according to the cyanide content of the effluent of the air floatation separation zone 4, the effluent is selected to enter a subsequent treatment facility 6 or an accident pool 5, and when the cyanide content of the effluent of the air floatation separation zone exceeds the designed value, the effluent is discharged into the accident pool 5 for retreatment.
In the treatment system, a mud bucket is arranged at the bottom of the oil removal tank 2, and a slag scraper is arranged at the upper part of the tank body. The residue scraper is used for removing light oil at the top of the oil removal pool 2, and heavy oil correspondingly sinks into the mud bucket.
In the treatment system, a stirrer or a gas stirring device is arranged in the air floatation reaction area 3 of the air floatation tank, and the stirrer or the gas stirring device can make the decyanation agent contact with the wastewater more fully, thereby being beneficial to improving the decyanation effect.
In the treatment system, a cyanide concentration detector is arranged at a water outlet of an air floatation separation area of an air floatation tank to detect the cyanide content condition of outlet water, so that the outlet water enters a subsequent treatment facility 6 or an accident tank 5 according to the detection result.
The deoiling pond in this scheme is integration oil interceptor.
The processing system comprises the following processing steps:
(1) discharging the desulfurization waste liquid and the residual ammonia water into an ammonia still together, and evaporating partial cyanide and the like;
(2) enabling the effluent of the ammonia still to enter an oil removal tank, and hydraulically staying for 30-60 min, wherein a mud bucket is arranged at the bottom of the tank, a residue scraper is arranged at the upper part of the tank body, heavy oil is sunk into the mud bucket, and light oil is scraped into an oil storage barrel by the residue scraper to be treated;
(3) the effluent discharged from the oil removal tank firstly enters an air flotation reaction zone, a decyanation agent (namely ferrous sulfate) is added into the zone, a stirrer or a gas stirring device is used for stirring, the stirring speed is 50-300r/min, the stirring time is 15-30 min, and the water power stays for 15-30 min; after reaction, the mixture flows into an air flotation separation zone, and is subjected to solid-liquid separation through the air flotation separation zone and discharged;
(4) and (3) enabling the effluent discharged from the air floatation separation area to enter a subsequent treatment facility or an accident pool, if the cyanide removal effect is not good or exceeds a design value, discharging the effluent discharged from the air floatation separation area into the accident pool, and then pumping the effluent into an ammonia still by turns from the accident pool for recycling, wherein the effluent in the accident pool can be directly introduced into the oil removal pool 2 for re-reaction according to actual conditions.
The treatment system utilizes the ammonia still to remove most cyanide, the effluent of the ammonia still enters an integrated oil removal facility to remove heavy oil and light oil, the dosage of a subsequent cyanogen removing agent is reduced, and the cyanogen removing effect is improved; the air floatation tank can effectively separate solid and liquid of products which are not easy to precipitate. The system is simple in composition, and can effectively solve the problems of low cyanide removal rate and high operation cost in the coking desulfurization waste liquid.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a processing system of coking desulfurization waste liquid which characterized in that: comprises an ammonia still, an oil removal tank and an air floatation tank which are connected in sequence along the circulation path of the desulfurization waste liquid; the air floating tank is divided into an air floating reaction zone and an air floating separation zone, the water outlet of the air floating reaction zone is connected with the water inlet of the air floating separation zone, the water outlet of the air floating separation zone is respectively connected with an accident tank and a subsequent treatment facility, and the water outlet of the accident tank is connected with the water inlet of the ammonia still.
2. The system for treating coking desulfurization waste liquid according to claim 1, characterized in that: the bottom of the oil removal tank is provided with a mud bucket, and the upper part of the tank body is provided with a slag scraper.
3. The system for treating coking desulfurization waste liquid according to claim 1, characterized in that: a gas stirring device is arranged in the air floatation reaction area of the air floatation tank.
4. The system for treating coking desulfurization waste liquid according to claim 3, characterized in that: a decyanation agent feeding device is arranged above the air floatation reaction area of the air floatation tank.
5. The system for treating coking desulfurization waste liquid according to claim 4, characterized in that: a cyanide concentration detector is arranged at the water outlet of the air floatation separation area of the air floatation tank.
6. The coking desulfurization waste liquid treatment system according to any one of claims 1 to 5, characterized in that: the water outlet of the accident pool is also connected with the water inlet of the oil removing pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020397666.6U CN212451024U (en) | 2020-03-25 | 2020-03-25 | Coking desulfurization waste liquid treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020397666.6U CN212451024U (en) | 2020-03-25 | 2020-03-25 | Coking desulfurization waste liquid treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN212451024U true CN212451024U (en) | 2021-02-02 |
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| CN202020397666.6U Active CN212451024U (en) | 2020-03-25 | 2020-03-25 | Coking desulfurization waste liquid treatment system |
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| CN (1) | CN212451024U (en) |
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