CN216687826U - System for integrated treatment blue charcoal waste water - Google Patents
System for integrated treatment blue charcoal waste water Download PDFInfo
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- CN216687826U CN216687826U CN202123268644.3U CN202123268644U CN216687826U CN 216687826 U CN216687826 U CN 216687826U CN 202123268644 U CN202123268644 U CN 202123268644U CN 216687826 U CN216687826 U CN 216687826U
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
A system for comprehensively treating semi-coke wastewater comprises an acid adjusting and chemical adding tank, a shallow air flotation device, an extraction reactor, a back extraction reactor and an oil separator; the acid adjusting and medicine adding pool is used for adjusting the pH value of the semi-coke wastewater; the shallow air flotation device is connected with the acid and medicine adjusting tank to remove tar substances; the extraction reactor is connected with the shallow air flotation device to extract the phenol oil in the semi-coke wastewater; a back extraction reactor connected with the extraction reactor to recover the extractant; the oil separator is connected with the water phase outlet of the back extraction reactor to recover the phenol oil; the device removes tar in the wastewater through the processes of acidification, extraction and back extraction, realizes resource recovery of phenol oil, and increases the economic benefit of semi coke production enterprises; meanwhile, the COD in the wastewater can be reduced from 40000-50000mg/L to 5000-6000mg/L, thereby greatly reducing the treatment load of the subsequent process.
Description
Technical Field
The utility model belongs to the field of wastewater treatment, and particularly relates to a system for comprehensively treating semi-coke wastewater.
Background
The semi-coke wastewater is industrial wastewater formed in the medium-low temperature dry distillation (about 550 ℃ and 800 ℃) process of coal and the purification and quenching process of coal gas. The waste water contains a large amount of pollutants which are not oxidized at high temperature, and the concentration of the pollutants is about 10 times higher than that of the conventional coking waste water, such as ammonia, phenol, petroleum and other substances.
Phenol and petroleum substances contained in the semi-coke wastewater are organic substances with high toxicity and poor degradability, and can cause serious harm to human health and ecological balance after being accumulated in the environment for a long time. The conventional technology for treating semi-coke wastewater in China at present has the following problems: (1) the removal rate of tar substances in the semi-coke wastewater is low, so that the subsequent process treatment load is large and collapse is easy to occur; (2) the organic matters contained in the wastewater have strong toxicity and high content, and the biochemical process is difficult to stably run; there is a need for further improvement.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a system for comprehensively treating semi-coke wastewater.
The utility model adopts the following technical scheme:
a system for comprehensively treating semi-coke wastewater comprises an acid adjusting and chemical adding tank, a shallow air flotation device, an extraction reactor, a back extraction reactor and an oil separator;
the acid-regulating dosing tank is used for regulating the pH value of the semi-coke wastewater and comprises a tank body, a water inlet which is arranged on the tank body and is used for the semi-coke wastewater to enter and a dosing port which is arranged on the tank body and is used for the acid to enter;
the shallow air flotation device is connected with the acid and medicine adjusting tank to remove tar substances;
the extraction reactor is connected with the shallow air flotation device to extract the phenol oil in the semi-coke wastewater and comprises an extraction reactor body, a water phase inlet arranged on the extraction reactor body, an extractant inlet arranged on the extraction reactor body, a water outlet arranged on the extraction reactor body and an extractant outlet arranged on the extraction reactor body;
the back extraction reactor is connected with the extraction reactor and comprises a back extraction reactor body connected with the extractant outlet, an oil phase outlet arranged on the back extraction reactor body and connected with the extractant inlet, and a water phase outlet arranged on the back extraction reactor body;
the oil separator is connected with a water phase outlet of the back extraction reactor to recover the phenol oil and comprises a shell, a phenol oil overflow groove arranged at the upper end of the shell, a dosing tank connected with the shell and used for storing sulfuric acid, a water outlet arranged at the bottom of the shell and a return pipe arranged between the water outlet and the acid regulating dosing tank.
The device further comprises an electrolytic catalytic oxidation reactor, a biochemical pool and a water outlet pool, wherein the electrolytic catalytic oxidation reactor is connected with a water outlet of the extraction reactor to remove organic matters which are difficult to degrade in the semi-coke wastewater; the biochemical pool is connected with the electrolytic catalytic oxidation reactor and is used for treating the entering semi-coke wastewater so as to reduce the concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus in the semi-coke wastewater; the water outlet tank is connected with the biochemical tank and temporarily stores the treated semi-coke wastewater.
Furthermore, the water outlet pool also comprises a water return pipe, one end of the water return pipe is connected with the water outlet pool, the other end of the water return pipe is connected with the electrolytic catalytic oxidation reactor, and the semi-coke wastewater which does not meet the water outlet requirement flows back to the electrolytic catalytic oxidation reactor for electrolytic treatment again.
Further comprises a waste gas treatment device which is respectively connected with the acid regulating and dosing tank and the electrolytic catalytic oxidation reactor.
Furthermore, a stirring blade is arranged in the tank body.
Further, the extraction reactor is a centrifugal extractor.
Further, a flow stabilizing plate is arranged in the phenol oil overflow groove.
Further, the device also comprises a water storage tank which is connected with the acid and medicine adjusting and adding tank and is used for supplying water to the acid and medicine adjusting and adding tank.
As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are: firstly, through the processes of acidification, extraction and back extraction, tar in the wastewater is removed, the resource recovery of phenol oil is realized, and the economic benefit of a semi coke production enterprise is increased; meanwhile, the COD in the wastewater can be reduced to 5000-6000mg/L from 40000-50000mg/L, so that the treatment load of the subsequent process is greatly reduced;
secondly, removing toxic organic matters in the wastewater through an electrolytic catalytic oxidation reactor, and reducing COD of the wastewater from 6000mg/L of 5000-plus to 1000mg/L of 700-plus, so as to improve the biodegradability of the wastewater and ensure the stable operation of the subsequent biochemical process;
and thirdly, a water return pipe is arranged between the water outlet pool and the electrolytic catalytic oxidation reactor, and when the semi-coke wastewater treatment does not meet the standard, the semi-coke wastewater can be returned to the electrolytic catalytic oxidation reactor through the water return pipe for retreatment, so that the environment is protected.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
in the figure, 1-water storage tank, 2-acid regulating and chemical adding tank, 3-shallow air flotation device, 4-extraction reactor, 5-back extraction reactor, 6-oil separator, 7-electrolytic catalytic oxidation reactor, 8-biochemical tank, 9-water outlet tank, 0-waste gas treatment device, 21-tank body, 22-water inlet, 23-chemical adding port, 24-stirring blade, 31-micro-nano bubble generator, 41-extraction reactor body, 42-water phase inlet, 43-extractant inlet, 44-water outlet, 45-extractant outlet, 51-back extraction reactor body, 52-oil phase outlet, 53-water phase outlet, 61-shell, 62-phenol oil overflow tank, 63-water outlet, 64-reflux pipe, 65-a steady flow plate and 91-a water return pipe.
Detailed Description
The utility model is further described below by means of specific embodiments.
Referring to fig. 1, the system for comprehensively treating semi-coke wastewater comprises a water storage tank 1, an acid and chemical regulating and adding tank 2, a shallow air flotation device 3, an extraction reactor 4, a back extraction reactor, an oil separator 6, an electrolytic catalytic oxidation reactor 7, a biochemical tank 8, a water outlet tank 9 and a waste gas treatment device 0.
And the water storage tank 1 is used for temporarily storing the collected semi-coke wastewater.
The acid-regulating and chemical-adding tank 2 is used for regulating the pH value of semi-coke wastewater and comprises a tank body 21, a water inlet 22 arranged on the tank body 21 and used for the semi-coke wastewater to enter, a chemical-adding port 23 arranged on the tank body 21 and used for the acid to enter and a stirring blade 24 rotatably arranged in the tank body 21; specifically, the acid for adjusting the pH value of the semi-coke wastewater adopts sulfuric acid, and the pH value of the semi-coke wastewater in the acid adjusting and adding tank 2 is adjusted to 6-6.5.
The shallow air flotation device 3 is connected with the acid and medicine adjusting tank 2 to remove tar substances in the semi-coke wastewater; specifically, the shallow air flotation device 3 is provided with a micro-nano bubble generator 31 to introduce a large amount of micro bubbles into the semi-coke wastewater, and the bubbles are adhered to fine suspended matters in the semi-coke wastewater through surface tension so as to enable tar substances in the wastewater to float out of the water surface, and then the tar substances are discharged through a pipeline and collected as hazardous waste for treatment; further, the shallow air flotation device 3 is a common device in the field of wastewater treatment, and the specific structure and the working principle thereof are not further described herein.
The extraction reactor 4 is connected with the shallow air flotation device 3 to extract the phenol oil in the semi-coke wastewater, and comprises an extraction reactor body 41, a water phase inlet 42 arranged on the extraction reactor body 41, an extractant inlet 43 arranged on the extraction reactor body 41, a water outlet 44 arranged on the extraction reactor body 41 and an extractant outlet 45 arranged on the extraction reactor body 41; specifically, tributyl phosphate is used as an extracting agent in the extraction reactor 4, and the ratio of tributyl phosphate to semi-coke wastewater is 5: 1; further, the extraction reactor 4 is a centrifugal extractor.
The back extraction reactor 5 is connected with the extraction reactor 4 and comprises a back extraction reactor body 51 connected with the extractant outlet 45, an oil phase outlet 52 arranged on the back extraction reactor body 51 and connected with the extractant inlet 43, and a water phase outlet 53 arranged on the back extraction reactor body 51; the oil phase after the back extraction treatment is returned to the extraction reactor 4 through the extractant inlet 43 for reuse, so that the waste of resources is reduced; specifically, in the back extraction, a 5% sodium hydroxide aqueous solution is used as a back extraction solution, and the ratio of the 5% sodium hydroxide aqueous solution to tributyl phosphate is 1: 1.
The oil separator 6 is connected with the water phase outlet 53 of the back extraction reactor 4 to recover the phenol oil, and comprises a shell 61, a phenol oil overflow groove 62 arranged at the upper end of the shell 61, a chemical adding tank connected with the shell 61 and used for storing sulfuric acid, a water outlet 63 arranged at the bottom of the shell 61 and a return pipe 64 arranged between the water outlet 63 and the acid regulating chemical adding tank 2; sulfuric acid is added into the shell through the medicine adding tank, and after pneumatic mixing, the liquid in the shell 61 is divided into two phases, wherein the upper part is an oil phase, and the lower part is a water phase; the oil phase is phenol oil and flows out of the shell 61 through a phenol oil overflow groove 62 to complete the recovery of the phenol oil; the water phase enters an acid adjusting and medicine adding pool 2 through a return pipe 64 to be used as an acid supplement to adjust the pH value of the semi-coke wastewater; specifically, a flow stabilizing plate 65 is arranged in the phenol oil overflow groove 62, so that the flow rate of the oil phase entering the overflow groove 62 is reduced, and the recovery of the phenol oil is ensured; further, when the back extraction phase from the back extraction reactor 5 is treated, the pH of the back extraction phase is adjusted to 1.5-2.0 by sulfuric acid.
The electrolytic catalytic oxidation reactor 7 is connected with a water outlet 44 of the extractor reactor to remove organic matters which are difficult to degrade in the semi-coke wastewater; the electrolytic catalytic oxidation reactor 7 is provided with a special electrode, a stainless steel plate is used as a cathode, a titanium plate plated with ruthenium and iridium is used as an anode, and toxic organic matters in the wastewater are effectively removed through electrochemical oxidation, electric flocculation reaction and filtration in the electrolytic catalytic oxidation reactor 7; during the electrolytic treatment, the current density of the electrode is kept at 500-1000A/m2The hydraulic retention time is 20 min;specifically, the electrolytic catalytic oxidation reactor 7 is a common device in the field of wastewater treatment, and the specific structure and the working principle thereof are not further described herein.
The biochemical tank 8 is connected with the electrolytic catalytic oxidation reactor 7 and is used for treating the entering semi-coke wastewater so as to reduce the concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus of the semi-coke wastewater; specifically, the biochemical tank 8 is provided with an aeration device and a carbon source, urea and alkali liquor adding system so as to adjust the parameters of carbon, phosphorus and nitrogen proportion, aeration and the like of the semi-coke wastewater in the biochemical tank and further treat the wastewater; further, the biochemical tank 8 is a device commonly used in the field of wastewater treatment, and the specific structure and the working principle thereof are not further described herein.
The water outlet tank 9 is connected with the biochemical tank 8, temporarily stores the treated semi-coke wastewater, and comprises a water return pipe 91, one end of which is connected with the water outlet tank 9, and the other end of which is connected with the electrolytic catalytic oxidation reactor 7; before discharging, detecting the concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus of semi-coke wastewater temporarily stored in a water outlet pool; when the discharge requirement is met, directly discharging the treated semi-coke wastewater or using the semi-coke wastewater for quenching; when the requirement is not met, the semi-coke wastewater is returned to the electrolytic catalytic oxidation reactor 7 through the water return pipe 91 for electrolytic treatment again, so that the environment is protected.
The waste gas treatment device 0 is respectively connected with the acid regulating and dosing tank 2 and the electrolytic catalytic oxidation reactor 7 and is used for treating the generated waste gas; specifically, the waste gas treatment device 0 is a device commonly used in the field of waste water treatment, and the specific structure and the working principle thereof are not further described herein.
The reactors used in the method are all closed units, and the influence of substances generated in the reaction process on the surrounding environment can be effectively reduced.
The device removes tar in the wastewater through the processes of acidification, extraction and back extraction, realizes resource recovery of phenol oil, and increases the economic benefit of semi coke production enterprises; meanwhile, the COD in the wastewater can be reduced to 5000-6000mg/L from 40000-50000mg/L, so that the treatment load of the subsequent process is greatly reduced; the toxic organic matters in the wastewater are removed through the electrolytic catalytic oxidation reactor 0, the COD of the wastewater is reduced from 6000mg/L of 5000-fold to 1000mg/L of 700-fold, the biodegradability of the wastewater is improved, and the stable operation of the subsequent biochemical process is ensured.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the utility model, which is defined by the appended claims and their equivalents and modifications within the scope of the description.
Claims (8)
1. The utility model provides a system for integrated processing blue charcoal waste water which characterized in that: comprises an acid adjusting and medicine adding tank, a shallow air flotation device, an extraction reactor, a back extraction reactor and an oil separator;
the acid-regulating dosing tank is used for regulating the pH value of the semi-coke wastewater and comprises a tank body, a water inlet which is arranged on the tank body and is used for the semi-coke wastewater to enter and a dosing port which is arranged on the tank body and is used for the acid to enter;
the shallow air flotation device is connected with the acid and medicine adjusting tank to remove tar substances;
the extraction reactor is connected with the shallow air flotation device to extract the phenol oil in the semi-coke wastewater, and comprises an extraction reactor body, a water phase inlet arranged on the extraction reactor body, an extractant inlet arranged on the extraction reactor body, a water outlet arranged on the extraction reactor body and an extractant outlet arranged on the extraction reactor body;
the back extraction reactor is connected with the extraction reactor and comprises a back extraction reactor body connected with the extractant outlet, an oil phase outlet arranged on the back extraction reactor body and connected with the extractant inlet, and a water phase outlet arranged on the back extraction reactor body;
the oil separator is connected with a water phase outlet of the back extraction reactor to recover the phenol oil and comprises a shell, a phenol oil overflow groove arranged at the upper end of the shell, a dosing tank connected with the shell and used for storing sulfuric acid, a water outlet arranged at the bottom of the shell and a return pipe arranged between the water outlet and the acid regulating dosing tank.
2. The system for comprehensively treating semi-coke wastewater as claimed in claim 1, wherein: the device also comprises an electrolytic catalytic oxidation reactor, a biochemical pool and a water outlet pool, wherein the electrolytic catalytic oxidation reactor is connected with a water outlet of the extraction reactor so as to remove organic matters which are difficult to degrade in the semi-coke wastewater; the biochemical pool is connected with the electrolytic catalytic oxidation reactor and is used for treating the entering semi-coke wastewater so as to reduce the concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus in the semi-coke wastewater; the water outlet tank is connected with the biochemical tank and temporarily stores the treated semi-coke wastewater.
3. The system for comprehensively treating semi-coke wastewater as claimed in claim 2, wherein: the water outlet pool also comprises a water return pipe, one end of the water return pipe is connected with the water outlet pool, the other end of the water return pipe is connected with the electrolytic catalytic oxidation reactor, and the semi-coke wastewater which does not meet the water outlet requirement flows back to the electrolytic catalytic oxidation reactor for electrolytic treatment again.
4. The system for comprehensively treating semi-coke wastewater as claimed in claim 2, wherein: and the waste gas treatment device is respectively connected with the acid regulating and dosing tank and the electrolytic catalytic oxidation reactor.
5. The system for comprehensively treating semi-coke wastewater as claimed in claim 1, wherein: stirring blades are arranged in the tank body.
6. The system for comprehensively treating semi-coke wastewater as claimed in claim 1, wherein: the extraction reactor is a centrifugal extractor.
7. The system for comprehensively treating semi-coke wastewater as claimed in claim 1, wherein: and a flow stabilizing plate is arranged in the phenol oil overflow groove.
8. The system for comprehensively treating semi-coke wastewater as claimed in claim 1, wherein: and the water storage tank is connected with the acid and medicine adjusting and adding tank and is used for supplying water to the acid and medicine adjusting and adding tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123268644.3U CN216687826U (en) | 2021-12-23 | 2021-12-23 | System for integrated treatment blue charcoal waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123268644.3U CN216687826U (en) | 2021-12-23 | 2021-12-23 | System for integrated treatment blue charcoal waste water |
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| Publication Number | Publication Date |
|---|---|
| CN216687826U true CN216687826U (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123268644.3U Active CN216687826U (en) | 2021-12-23 | 2021-12-23 | System for integrated treatment blue charcoal waste water |
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| Country | Link |
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| CN (1) | CN216687826U (en) |
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2021
- 2021-12-23 CN CN202123268644.3U patent/CN216687826U/en active Active
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