CN114225688A - Recycling treatment system and treatment process for phenol water wastewater in distillation industry - Google Patents
Recycling treatment system and treatment process for phenol water wastewater in distillation industry Download PDFInfo
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- CN114225688A CN114225688A CN202111454316.4A CN202111454316A CN114225688A CN 114225688 A CN114225688 A CN 114225688A CN 202111454316 A CN202111454316 A CN 202111454316A CN 114225688 A CN114225688 A CN 114225688A
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- KSSNXJHPEFVKHY-UHFFFAOYSA-N phenol;hydrate Chemical compound O.OC1=CC=CC=C1 KSSNXJHPEFVKHY-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000002351 wastewater Substances 0.000 title claims abstract description 33
- 238000004821 distillation Methods 0.000 title claims abstract description 27
- 238000004064 recycling Methods 0.000 title claims abstract description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 104
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 56
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 56
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003546 flue gas Substances 0.000 claims abstract description 24
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000003197 catalytic effect Effects 0.000 claims abstract description 15
- 230000018044 dehydration Effects 0.000 claims abstract description 12
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 235000019198 oils Nutrition 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 235000019476 oil-water mixture Nutrition 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 14
- 239000010842 industrial wastewater Substances 0.000 description 6
- 239000008235 industrial water Substances 0.000 description 4
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011269 tar Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention belongs to the technical field of waste water recycling, and discloses a recycling treatment system and a treatment process for phenol water waste water in distillation industry, wherein the phenol water waste water is used for flue gas denitration treatment, and the recycling treatment system specifically comprises the steps that heated raw materials enter a dehydration tower, and an oil-water mixed material extracted from the top of the dehydration tower is cooled by a light oil condensing cooler and then enters an oil-water separator; preparing phenol water and strong ammonia water generated after oil-water separation by an oil-water separator into a dilute ammonia water solution, and storing the dilute ammonia water solution in a dilute ammonia water tank for later use; ammonia gas generated by evaporating the dilute ammonia water solution through an ammonia evaporator enters an ammonia gas buffer tank; and the ammonia gas and the air in the ammonia gas buffer tank are mixed in an ammonia gas-air mixer and then enter the catalytic reactor to react with the nitric oxide in the flue gas, so that the flue gas denitration treatment is realized. By adopting the treatment system and the treatment process, the problem of subsequent treatment of the industrial phenol water wastewater is solved, the production cost is reduced, the win-win situation is realized, and the cost is reduced and the benefit is increased for enterprises.
Description
Technical Field
The invention relates to the technical field of wastewater reuse, in particular to a treatment system and a treatment process for reusing phenol water wastewater in coal tar chemical distillation industry.
Background
In the tar distillation process, raw material tar is heated by a heater and then enters a dehydration tower; the oil-gas mixture generated at the top of the dehydrating tower is cooled by a light oil condensing cooler and then enters an oil-water separator, light oil separated by the oil-water separator enters a light oil finished product tank and then is sold, and the separated industrial wastewater enters a wastewater tank (phenol water). The industrial wastewater (phenol water) generated in the distillation production processing contains about 0.6% of ammonia with a certain concentration, the industrial wastewater (phenol water) containing ammonia is mostly discharged after being treated to reach the discharge standard, the problems of long treatment period, complex process, difficult treatment, high treatment cost and the like exist in the industrial wastewater (phenol water) treatment, and a treatment process for effectively recycling the industrial phenol water wastewater containing ammonia does not exist.
Therefore, how to provide a treatment system and a treatment process for recycling phenol water wastewater in distillation industry is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a treatment system and a treatment process for recycling distillation industrial phenol water wastewater, and aims to solve the problems of long treatment period, complex process, difficult treatment, high treatment cost and the like of the phenol water of the conventional industrial phenol water wastewater.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process for recycling and treating phenolic water wastewater in distillation industry, which uses the phenolic water wastewater for flue gas denitration treatment, comprises the following steps:
(1) the heated raw materials enter a dehydrating tower, and an oil-water mixture extracted from the top of the dehydrating tower is cooled by a light oil condensing cooler and then enters an oil-water separator;
(2) preparing phenol water and strong ammonia water generated after oil-water separation by an oil-water separator into a dilute ammonia water solution, and storing the dilute ammonia water solution in a dilute ammonia water tank for later use;
(3) ammonia gas generated by evaporating the dilute ammonia water solution through an ammonia evaporator enters an ammonia gas buffer tank;
(4) and the ammonia gas and the air in the ammonia gas buffer tank are mixed in an ammonia gas-air mixer and then enter the catalytic reactor to react with the nitric oxide in the flue gas, so that the flue gas denitration treatment is realized.
Preferably, in the above process for recycling the phenol water wastewater in the distillation industry, the heating temperature of the raw material in the step (1) is 140 ℃ ℃ ℃ ℃.; the cooling temperature is less than or equal to 55 ℃.
Preferably, in the above process for recycling phenol water wastewater from distillation industry, the phenol water produced by oil-water separation in step (2) enters a phenol water tank for later use.
Preferably, in the above process for recycling phenol water wastewater from distillation industry, the concentration of ammonia in the phenol water in step (2) is about 0.6%, and the concentration of the dilute ammonia solution is 15% -20%.
Preferably, in the above-mentioned one of the recycling treatment processes of distillation industrial phenol water wastewater, the evaporation condition in the step (3) is 150-.
Preferably, in the above-mentioned one of the processes for recycling the phenol water waste of distillation industry, the mixing ratio of ammonia gas and air in step (4) is 2: 5.
Preferably, in the above-mentioned process for recycling phenol water waste in distillation industry, the catalytic reaction conditions in step (4) are as follows: < 300 ℃.
The invention also discloses a treatment system adopted by the distillation industrial phenol water wastewater recycling treatment process, which comprises a dehydration tower, a light oil condensing cooler, an oil-water separator, a dilute ammonia water tank, an ammonia evaporator, an ammonia buffer tank, an ammonia-air mixer and a catalytic reactor;
the dehydration tower is communicated with the light oil condenser and the oil-water separator in sequence through pipelines, the phenol water generated by the oil-water separator and the dilute ammonia water solution obtained by mixing the concentrated ammonia water flow into the dilute ammonia water tank through pipelines, and the dilute ammonia water tank is communicated with the ammonia evaporator, the ammonia buffer tank, the ammonia-air mixer and the catalytic reactor through pipelines in sequence.
Preferably, in the above system for recycling and treating phenol water waste in distillation industry, the system further comprises a phenol water tank, and the phenol water tank is communicated with the outlet of the oil-water separator through a pipeline.
Preferably, in the above system for recycling and treating phenol water wastewater in distillation industry, the system further comprises a concentrated ammonia water tank, and an outlet of the concentrated ammonia water tank and an outlet of the phenol water tank converge at a point and then are communicated to an inlet of the dilute ammonia water tank through the same pipeline.
According to the technical scheme, compared with the prior art, the invention discloses and provides a system and a process for recycling and treating the phenol water wastewater in the distillation industry, and the system and the process have the following beneficial effects:
the treatment process disclosed by the invention can reduce the use amount of concentrated ammonia water and water in the flue gas denitration process, can also consume industrial phenol water wastewater generated in distillation production, reduces the use amount of about 0.6% of ammonia water in the denitration process, and reduces the production cost of the traditional denitration process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart illustrating a tray process according to the present invention.
In the figure, 1 is a dehydration tower, 2 is a light oil condensate cooler, 3 is an oil-water separator, 4 is a phenol water tank, 5 is a concentrated ammonia water tank, 6 is a dilute ammonia water tank, 7 is an ammonia evaporator, 8 is an ammonia buffer tank, 9 is an ammonia-air mixer, and 10 is a catalytic reactor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to the attached figure 1, the invention provides a distillation industrial phenol water wastewater recycling treatment system, which comprises a dehydration tower, a light oil condensing cooler, an oil-water separator, a dilute ammonia tank, an ammonia evaporator, an ammonia buffer tank, an ammonia-air mixer and a catalytic reactor, wherein the dehydration tower is connected with the light oil condensing cooler;
the dehydration tower is communicated with the light oil condenser and the oil-water separator in sequence through pipelines, the phenol water generated by the oil-water separator and the dilute ammonia water solution obtained by mixing the concentrated ammonia water flow into the dilute ammonia water tank through pipelines, and the dilute ammonia water tank is communicated with the ammonia evaporator, the ammonia buffer tank, the ammonia-air mixer and the catalytic reactor through pipelines in sequence.
In order to further optimize the technical scheme, the device also comprises a phenol water tank and a concentrated ammonia water tank, wherein the phenol water tank is communicated with an outlet of the oil-water separator through a pipeline; the outlet of the concentrated ammonia water tank and the outlet of the phenol water tank are converged at one point and then communicated to the inlet of the dilute ammonia water tank through the same pipeline.
The process for recycling the phenol water wastewater in the distillation industry by applying the system comprises the following steps:
the heated raw materials enter a dehydration tower 1, oil-water mixed materials extracted from the top of the tower are cooled by a light oil condensing cooler 2 and then enter an oil-water separator 3 by utilizing the different boiling points of the substances, and industrial wastewater at the bottom enters a phenol water tank 4 after the oil-water separation by the oil-water separator 3; mixing the industrial wastewater phenol water in the phenol water tank 4 with the concentrated ammonia in the concentrated ammonia water tank 5Preparing diluted ammonia water solution with required concentration by water according to a proportion, and then feeding the diluted ammonia water solution into a diluted ammonia water tank 6; the dilute ammonia water solution in the dilute ammonia water tank 6 is evaporated by an ammonia evaporator 7 to generate ammonia gas which enters an ammonia gas buffer tank 8; the ammonia gas in the ammonia gas buffer tank 8 and the air are mixed in the ammonia gas-air mixer 9 and then enter the catalytic reactor 10, and the ammonia gas and the air are mixed with the Nitrogen Oxide (NO) in the flue gas in the catalytic reactor 10X) Reacting to achieve the aim of flue gas denitration, wherein the final denitration effect reaches NOX＜150mg/Nm3。
It should be noted that the flue gas denitration technology has the following working principle: for preventing Nitrogen Oxide (NO) generated after combustion of tail gas in boilerX) The environmental pollution needs to be solved, and the flue gas needs to be denitrated. The flue gas generated by a boiler of a company is usually subjected to denitration treatment by adopting an SCR flue gas denitration technology, wherein the SCR flue gas denitration technology is used for removing Nitrogen Oxides (NO) in the flue gas under the action of a catalystX) And ammonia (NH)3) Reaction to nitrogen (N)2) And water (H)2O), ammonia water with certain concentration is evaporated to obtain ammonia gas through an ammonia evaporator, the ammonia gas enters a buffer tank, the ammonia gas is diluted through an ammonia gas-air mixer through a dilution fan and then is sent into a catalytic reactor, the ammonia gas and the dedusted flue gas from a boiler are subjected to catalytic reaction, and Nitrogen Oxides (NO) generated in the combustion process in the boiler are removedX)。
Comparative example
According to the working principle of the flue gas denitration technology, the traditional flue gas denitration process is as follows:
preparing strong ammonia water and industrial water into a dilute ammonia water solution according to a certain proportion, and evaporating the dilute ammonia water solution through an ammonia evaporator 7 to generate ammonia gas to enter an ammonia gas buffer tank 8; the ammonia gas in the ammonia gas buffer tank 8 and the air are mixed in the ammonia gas-air mixer 9 and then enter the catalytic reactor 10, and the ammonia gas and the air are mixed with the Nitrogen Oxide (NO) in the flue gas in the catalytic reactor 10X) Reacting to achieve the aim of flue gas denitration, wherein the final denitration effect is NOX＜150mg/Nm3。
By comparing the examples of the present invention with the comparative examples, it can be found that: aiming at the step of preparing the industrial water and the strong ammonia water into the dilute ammonia water solution with the required concentration, the invention replaces the industrial water with the industrial phenol water wastewater, and then prepares the dilute ammonia water solution with the required concentration with the strong ammonia water, and because the phenol water contains ammonia with a certain concentration, the using amount of the strong ammonia water and the industrial water in the flue gas denitration process can be reduced, the using amount is 10-20 tons per day, and the treating amount of the phenol water wastewater is reduced.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The process for recycling and treating the phenol water wastewater in the distillation industry is characterized in that the phenol water wastewater is used for flue gas denitration treatment, and comprises the following steps:
(1) the heated raw materials enter a dehydrating tower, and an oil-water mixture extracted from the top of the dehydrating tower is cooled by a light oil condensing cooler and then enters an oil-water separator;
(2) preparing phenol water and strong ammonia water generated after oil-water separation by an oil-water separator into a dilute ammonia water solution, and storing the dilute ammonia water solution in a dilute ammonia water tank for later use;
(3) ammonia gas generated by evaporating the dilute ammonia water solution through an ammonia evaporator enters an ammonia gas buffer tank;
(4) and the ammonia gas and the air in the ammonia gas buffer tank are mixed in an ammonia gas-air mixer and then enter the catalytic reactor to react with the nitric oxide in the flue gas, so that the flue gas denitration treatment is realized.
2. The recycling treatment process for phenol water wastewater in distillation industry as claimed in claim 1, wherein the heating temperature of raw materials in step (1) is 140-170 ℃; the cooling temperature is less than or equal to 55 ℃.
3. The process of claim 1, wherein the phenol water produced by oil-water separation in step (2) is fed into a phenol water tank for further use.
4. The process of claim 1 or 3, wherein the phenol water in step (2) contains ammonia at a concentration of 0.3 to 0.6%, and the dilute ammonia solution at a concentration of 15 to 20%.
5. The process of claim 1, wherein the evaporation conditions in step (3) are 150-350 ℃.
6. The process of claim 1, wherein the mixing ratio of ammonia gas to air in step (4) is 2: 5.
7. The process for recycling and treating the phenol water wastewater in the distillation industry as claimed in claim 1, wherein the catalytic reaction conditions in the step (4) are as follows: < 300 ℃.
8. A treatment system adopted in the distillation industrial phenol water wastewater recycling treatment process according to any one of claims 1 to 7, which is characterized by comprising a dehydration tower, a light oil condensing cooler, an oil-water separator, a dilute ammonia water tank, an ammonia evaporator, an ammonia buffer tank, an ammonia-air mixer and a catalytic reactor;
the dehydration tower is communicated with the light oil condenser and the oil-water separator in sequence through pipelines, the phenol water generated by the oil-water separator and the dilute ammonia water solution obtained by mixing the concentrated ammonia water flow into the dilute ammonia water tank through pipelines, and the dilute ammonia water tank is communicated with the ammonia evaporator, the ammonia buffer tank, the ammonia-air mixer and the catalytic reactor through pipelines in sequence.
9. The distillation industrial phenol water wastewater recycling treatment system according to claim 8, further comprising a phenol water tank, wherein the phenol water tank is communicated with the outlet of the oil-water separator through a pipeline.
10. The system of claim 9, further comprising a concentrated ammonia tank, wherein an outlet of the concentrated ammonia tank and an outlet of the phenol tank are gathered together and communicated to an inlet of the dilute ammonia tank through the same pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111454316.4A CN114225688A (en) | 2021-12-01 | 2021-12-01 | Recycling treatment system and treatment process for phenol water wastewater in distillation industry |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111454316.4A CN114225688A (en) | 2021-12-01 | 2021-12-01 | Recycling treatment system and treatment process for phenol water wastewater in distillation industry |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111759A (en) * | 1976-07-08 | 1978-09-05 | United States Steel Corporation | Process for separating ammonia and acid gases from waste waters containing fixed ammonia salts |
| JP2000300902A (en) * | 1999-04-23 | 2000-10-31 | Jgc Corp | Distillation apparatus |
| WO2002036496A1 (en) * | 1999-05-07 | 2002-05-10 | Babcock-Hitachi Kabushiki Kaisha | Method for purifying effluent water containing ammonia |
| CN104689679A (en) * | 2014-12-18 | 2015-06-10 | 成都华西堂投资有限公司 | Desulfurization and denitrification process for coke oven flue gas |
| CN207079195U (en) * | 2017-07-20 | 2018-03-09 | 上海宝钢化工有限公司 | A kind of new tar distillation device |
-
2021
- 2021-12-01 CN CN202111454316.4A patent/CN114225688A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111759A (en) * | 1976-07-08 | 1978-09-05 | United States Steel Corporation | Process for separating ammonia and acid gases from waste waters containing fixed ammonia salts |
| JP2000300902A (en) * | 1999-04-23 | 2000-10-31 | Jgc Corp | Distillation apparatus |
| WO2002036496A1 (en) * | 1999-05-07 | 2002-05-10 | Babcock-Hitachi Kabushiki Kaisha | Method for purifying effluent water containing ammonia |
| CN104689679A (en) * | 2014-12-18 | 2015-06-10 | 成都华西堂投资有限公司 | Desulfurization and denitrification process for coke oven flue gas |
| CN207079195U (en) * | 2017-07-20 | 2018-03-09 | 上海宝钢化工有限公司 | A kind of new tar distillation device |
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Application publication date: 20220325 |