CN216106784U - Coal tar dehydration water processing system - Google Patents
Coal tar dehydration water processing system Download PDFInfo
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- CN216106784U CN216106784U CN202120268133.2U CN202120268133U CN216106784U CN 216106784 U CN216106784 U CN 216106784U CN 202120268133 U CN202120268133 U CN 202120268133U CN 216106784 U CN216106784 U CN 216106784U
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- Prior art keywords
- washing tower
- coal tar
- tower
- discharge
- pipe
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- 239000011280 coal tar Substances 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 230000018044 dehydration Effects 0.000 title claims abstract description 12
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 12
- 238000005406 washing Methods 0.000 claims abstract description 79
- 239000003513 alkali Substances 0.000 claims abstract description 38
- NESLWCLHZZISNB-UHFFFAOYSA-M sodium phenolate Chemical compound [Na+].[O-]C1=CC=CC=C1 NESLWCLHZZISNB-UHFFFAOYSA-M 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 230000007935 neutral effect Effects 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 5
- 230000003068 static effect Effects 0.000 claims description 16
- 238000005201 scrubbing Methods 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 9
- 239000010802 sludge Substances 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 abstract description 12
- 238000004064 recycling Methods 0.000 abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 44
- 235000011121 sodium hydroxide Nutrition 0.000 description 16
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 12
- 239000007788 liquid Substances 0.000 description 10
- 208000005156 Dehydration Diseases 0.000 description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 4
- 238000003795 desorption Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- -1 polycyclic aromatic compounds Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
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Abstract
The utility model provides a coal tar dewatering treatment system, and belongs to the technical field of coal tar deep processing. The system comprises an alkali preparation tank, a primary washing tower and a secondary washing tower, wherein the alkali preparation tank is provided with a coal tar dehydration water feeding pipe and a solid alkali feeding port, and the discharge end of the alkali preparation tank is provided with an alkali liquor discharge pump. The primary washing tower is connected with the outlet end of the alkali liquor discharge pump. The feed end of the primary washing tower is connected with a first-washing third-mixing oil feed pipe, the top discharge end of the primary washing tower is provided with a third-mixing oil discharge pipe, and the bottom discharge end of the primary washing tower is provided with an alkaline phenol sodium salt discharge pump. The feed end of the secondary washing tower is connected with the outlet end of the alkaline sodium phenolate discharging pump, the feed end of the secondary washing tower is provided with a crude-tertiary mixed oil feeding pipe, the top of the secondary washing tower is connected with a tertiary mixed oil feeding pipe, and a tower kettle is provided with a neutral sodium phenolate discharging pipe. Residual organic matters in the coal tar removal wastewater are extracted by using the three-component mixed oil, so that recycling of partial organic matters is realized, and comprehensive utilization of the coal tar removal wastewater is realized.
Description
Technical Field
The utility model belongs to the technical field of coal tar deep processing, and particularly relates to a coal tar dewatering treatment system.
Background
The coal tar is further processed to obtain various chemical products, such as industrial naphthalene, phenol oil, washing oil, anthracene oil and the like, and simultaneously, a large amount of waste water is generated in the coal tar processing process, and the waste water contains high-concentration organic matters, cyanogen and other highly toxic substances, has high toxicity and complex components. The organic pollutants are mainly monocyclic or polycyclic aromatic compounds and heterocyclic compounds containing nitrogen, sulfur and oxygen, such as high-concentration phenol, naphthalene, aniline, pyridine, quinoline, benzopyrene, etc. Coal tar waste water belongs to difficult processing waste water, and among the prior art, chinese utility model patent for example with patent number 201821042252.0 discloses a coal tar deep-processing waste water treatment recovery production line, including sedimentation tank, oil interceptor, equalizing basin, ammonia tower, dephenolizer, air supporting pond, flocculation basin and the adsorption tower that connects gradually, this production line though can handle coal tar waste water, but the water treatment cost is high, and is difficult to recycle organic component such as phenol, naphthalene that contains in the waste water.
Disclosure of Invention
In view of this, the utility model provides a coal tar dehydration water treatment system, which solves the technical problems that the coal tar wastewater treatment cost is high and organic components such as phenol, naphthalene, pyridine, quinoline and the like are difficult to recycle in the prior art.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a coal tar removal water treatment system comprising:
the device comprises an alkali preparation tank, a coal tar dehydration water feeding pipe and a solid alkali feeding port are arranged on the alkali preparation tank, and an alkali liquor discharging pump is arranged at the discharging end of the alkali preparation tank;
the primary washing tower is connected with the outlet end of the alkali liquor discharge pump; the feeding end of the primary washing tower is connected with a first-washing third-mixing oil feeding pipe, the top discharging end of the primary washing tower is provided with a third-mixing oil discharging pipe, and the bottom discharging end of the primary washing tower is provided with an alkaline phenol sodium salt discharging pump; and
the secondary scrubbing tower, the feed end of secondary scrubbing tower is connected the exit end of alkaline phenol sodium salt discharge pump, just the feed end of secondary scrubbing tower is provided with thick three miscella feed pipes, the top of the tower of secondary scrubbing tower is connected one washes three miscella feed pipes, and the tower cauldron is provided with neutral phenol sodium salt discharging pipe.
Preferably, an outlet of the lye discharge pump is provided with an oil sludge filter for removing oil sludge in the lye.
Preferably, a first static mixer is arranged at the feed end of the secondary washing tower, and the feed end of the first static mixer is connected with the outlet end of the alkaline sodium phenolate discharging pump and the crude mixed oil feeding pipe.
Preferably, a second static mixer is arranged at the feed end of the primary washing tower, and the feed end of the second static mixer is connected with the tower top discharge end of the secondary washing tower and the outlet end of the alkali liquor discharge pump.
Preferably, the outlet end of the alkali liquor discharge pump is also connected with the feed end of the secondary washing tower.
Preferably, the middle parts of the primary washing tower and the secondary washing tower are respectively provided with an emulsion discharge pipe.
Preferably, the emulsion discharge pipe comprises an upper discharge pipe, a middle discharge pipe and a lower discharge pipe which are arranged from top to bottom in sequence.
Preferably, 25-30 layers of sieve plates are arranged in the primary washing tower and the secondary washing tower.
According to the technical scheme, the utility model provides a coal tar dewatering treatment system, which has the beneficial effects that: through the arrangement of an alkali preparation tank, a primary washing tower and a secondary washing tower, coal tar dehydration water is firstly mixed with caustic soda flakes in the alkali preparation tank to prepare liquid caustic soda with the mass concentration of 15-20%. Liquid caustic soda is firstly sent into the primary washing tower through an alkaline liquor discharge pump and is contacted and washed with the first-washing three-mixed oil discharged from the top of the secondary washing tower, and the discharged liquid from the top of the secondary washing tower is the washed three-mixed oil and is used for producing products such as industrial naphthalene, washing oil and the like through subsequent fractionation. The discharged material at the bottom of the tower is alkaline sodium phenolate solution containing 3% -5% liquid caustic soda. And the alkaline sodium phenolate solution at the bottom of the primary washing tower is sent to the secondary washing tower to be contacted and washed with the crude mixed oil, the top discharge of the secondary washing tower is the mixed oil for the first washing and the third washing, and the bottom discharge of the secondary washing tower is the neutral sodium phenolate. The neutral sodium phenolate can be directly sold as a product, and can also be subjected to the working procedures of steaming, purification and the like to produce a product with high added value. The system utilizes the tertiary mixed oil to extract residual organic matters in the coal tar desorption wastewater to realize recycling of partial organic matters on one hand, and utilizes alkali liquor to wash the tertiary mixed oil to remove phenols in the tertiary mixed oil to produce crude sodium phenolate and realize comprehensive utilization of the coal tar desorption wastewater on the other hand.
Drawings
FIG. 1 is a schematic flow diagram of a coal tar water removal treatment system.
In the figure: the system comprises a coal tar dewatering treatment system 10, an alkali preparation tank 100, a coal tar dewatering feed pipe 101, a solid alkali feed inlet 102, an alkali liquor discharge pump 110, an oil sludge filter 120, a primary washing tower 200, a first washing three-oil mixing feed pipe 201, a three-oil mixing discharge pipe 202, an alkaline sodium phenolate discharge pump 210, a secondary washing tower 300, a crude three-oil mixing feed pipe 301, a neutral sodium phenolate discharge pipe 302, a first static mixer 400, a second static mixer 500, an emulsion discharge pipe 600, an upper turbid discharge pipe 601, a middle turbid discharge pipe 602 and a lower turbid discharge pipe 603.
Detailed Description
The technical scheme and the technical effect of the utility model are further elaborated in the following by combining the drawings of the utility model.
Referring to fig. 1, in an embodiment, a coal tar dehydration treatment system 10 is used for recycling coal tar dehydration, and includes coal tar storage tank bottom discharge and coal tar preliminary distillation dehydration. The coal tar dehydration treatment system 10 comprises an alkali preparation tank 100, a primary washing tower 200 and a secondary washing tower 300, wherein the alkali preparation tank 100 is provided with a coal tar dehydration feed pipe 101 and a solid alkali feed port 102, and the discharge end of the alkali preparation tank 100 is provided with an alkali liquor discharge pump 110. The outlet end of the alkali liquor discharge pump 110 is connected to the washing tower 200, the feed end of the washing tower 200 is connected with a mixed oil inlet pipe 201, the top discharge end of the washing tower 200 is provided with a mixed oil outlet pipe 202, and the bottom discharge end of the tower is provided with an alkaline sodium phenolate discharge pump 210. The feed end of secondary scrubbing tower 300 is connected the exit end of alkaline phenol sodium salt discharge pump 210, just the feed end of secondary scrubbing tower 300 is provided with crude three miscella feed pipe 301, the top of the tower of secondary scrubbing tower 300 is connected one washes three miscella feed pipes 201, and the tower cauldron is provided with neutral phenol sodium salt discharging pipe 302.
Firstly, water removed from coal tar is mixed with caustic soda flakes in the caustic soda blending tank 100 to prepare liquid caustic soda with the mass concentration of 15-20%. The liquid caustic soda is firstly sent into the primary washing tower 200 through the lye discharge pump 110, and is contacted and washed with the first-washing three-mixed oil discharged from the top of the secondary washing tower 300, and the discharged liquid from the top of the tower is the washed three-mixed oil, and is used for producing products such as industrial naphthalene, washing oil and the like by subsequent fractionation. The discharged material at the bottom of the tower is alkaline sodium phenolate solution containing 3% -5% liquid caustic soda. And the alkaline sodium phenolate solution at the bottom of the primary washing tower 200 is sent to the secondary washing tower 300 to be contacted and washed with the crude mixed oil, the top discharge of the secondary washing tower 300 is the mixed oil of the first washing and the third washing, and the bottom discharge is the neutral sodium phenolate. The neutral sodium phenolate can be directly sold as a product, and can also be subjected to the working procedures of steaming, purification and the like to produce a product with high added value. The system utilizes the tertiary mixed oil to extract residual organic matters in the coal tar desorption wastewater to realize recycling of partial organic matters on one hand, and utilizes alkali liquor to wash the tertiary mixed oil to remove phenols in the tertiary mixed oil to produce crude sodium phenolate and realize comprehensive utilization of the coal tar desorption wastewater on the other hand.
Further, an outlet of the alkali discharge pump 110 is provided with an oil sludge filter 120 for removing oil sludge in the alkali liquor.
In a preferred embodiment, a first static mixer 400 is arranged at the feed end of the secondary washing tower 300, and the feed end of the first static mixer 400 is connected with the outlet end of the alkaline sodium phenolate discharge pump 210 and the crude mixed oil feed pipe 301. The alkaline sodium phenolate solution from the bottom of the primary scrubber 200 and the crude tertiary mixed oil are first fully mixed in the first static mixer 400 and then enter the secondary scrubber 300 for layering, thereby improving the scrubbing effect.
Further, a second static mixer 500 is arranged at the feed end of the primary washing tower 200, and the feed end of the second static mixer 500 is connected with the top discharge end of the secondary washing tower 300 and the outlet end of the alkali liquor discharge pump 110. After water and caustic soda flakes are removed from the coal tar to prepare liquid caustic soda, the liquid caustic soda is firstly fed into the second static mixer 500, and is fully mixed with the first-washing third-mixing oil from the top of the secondary washing tower 200, and then the mixture is fed into the primary washing tower 200 for layering, so that the washing effect is improved.
In one embodiment, the outlet end of the lye discharge pump 110 is also connected to the feed end of the secondary scrubber 300. In the initial stage of the start-up, the alkali liquor from the alkali liquor discharge pump 110 is used as the feed of the secondary washing tower 300, so that the normal start-up of the device is ensured.
In one embodiment, the emulsion discharge pipes 600 are disposed at the middle of the primary scrubber 200 and the secondary scrubber 300, respectively. Preferably, the emulsion discharge pipe 600 includes an upper discharge turbidity pipe 601, a middle discharge turbidity pipe 602, and a lower discharge turbidity pipe 603, which are provided in this order from top to bottom. Through the emulsion discharge pipe 600, the emulsion generated in the middle of the primary washing tower 200 and the secondary washing tower 300 is discharged irregularly, and the normal operation of the device is ensured.
In one embodiment, 25 to 30 layers of sieve plates are disposed in the primary washing tower and the secondary washing tower, so as to further improve the washing and separating effects of the primary washing tower 200 and the secondary washing tower 300.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (8)
1. A coal tar dewatering water treatment system, comprising:
the device comprises an alkali preparation tank, a coal tar dehydration water feeding pipe and a solid alkali feeding port are arranged on the alkali preparation tank, and an alkali liquor discharging pump is arranged at the discharging end of the alkali preparation tank;
the primary washing tower is connected with the outlet end of the alkali liquor discharge pump; the feeding end of the primary washing tower is connected with a first-washing third-mixing oil feeding pipe, the top discharging end of the primary washing tower is provided with a third-mixing oil discharging pipe, and the bottom discharging end of the primary washing tower is provided with an alkaline phenol sodium salt discharging pump; and
the secondary scrubbing tower, the feed end of secondary scrubbing tower is connected the exit end of alkaline phenol sodium salt discharge pump, just the feed end of secondary scrubbing tower is provided with thick three miscella feed pipes, the top of the tower of secondary scrubbing tower is connected one washes three miscella feed pipes, and the tower cauldron is provided with neutral phenol sodium salt discharging pipe.
2. The coal tar dewatering water treatment system according to claim 1, wherein an outlet of the lye discharge pump is provided with a sludge filter for removing sludge from the lye.
3. The coal tar removal water treatment system of claim 1, wherein a first static mixer is arranged at the feed end of the secondary washing tower, and the feed end of the first static mixer is connected with the outlet end of the alkaline sodium phenolate discharge pump and a crude mixed oil feeding pipe.
4. The coal tar removal water treatment system of claim 3, wherein the feed end of the primary scrubber is provided with a second static mixer, and the feed end of the second static mixer is connected with the overhead discharge end of the secondary scrubber and the outlet end of the lye discharge pump.
5. The coal tar removal water treatment system of claim 1, wherein the outlet end of the lye discharge pump is further connected to the feed end of the secondary scrubber.
6. The coal tar water removal treatment system according to claim 1, wherein emulsion discharge pipes are respectively arranged in the middle parts of the primary washing tower and the secondary washing tower.
7. The coal tar dewatering treatment system according to claim 6, wherein the emulsion discharge pipe comprises an upper turbidity discharge pipe, a middle turbidity discharge pipe and a lower turbidity discharge pipe which are arranged in sequence from top to bottom.
8. The coal tar water removal treatment system according to claim 1, wherein 25 to 30 layers of sieve plates are arranged in the primary washing tower and the secondary washing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120268133.2U CN216106784U (en) | 2021-01-29 | 2021-01-29 | Coal tar dehydration water processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120268133.2U CN216106784U (en) | 2021-01-29 | 2021-01-29 | Coal tar dehydration water processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216106784U true CN216106784U (en) | 2022-03-22 |
Family
ID=80686303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120268133.2U Expired - Fee Related CN216106784U (en) | 2021-01-29 | 2021-01-29 | Coal tar dehydration water processing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216106784U (en) |
-
2021
- 2021-01-29 CN CN202120268133.2U patent/CN216106784U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220322 |
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| CF01 | Termination of patent right due to non-payment of annual fee |