CN114195282B - Residual ammonia water treatment system and treatment method - Google Patents
Residual ammonia water treatment system and treatment method Download PDFInfo
- Publication number
- CN114195282B CN114195282B CN202111267340.7A CN202111267340A CN114195282B CN 114195282 B CN114195282 B CN 114195282B CN 202111267340 A CN202111267340 A CN 202111267340A CN 114195282 B CN114195282 B CN 114195282B
- Authority
- CN
- China
- Prior art keywords
- ammonia water
- oil
- residual ammonia
- ceramic filter
- alkali
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 235000011114 ammonium hydroxide Nutrition 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000003513 alkali Substances 0.000 claims abstract description 55
- 239000000919 ceramic Substances 0.000 claims abstract description 39
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 55
- 239000007788 liquid Substances 0.000 claims description 18
- 238000004821 distillation Methods 0.000 claims description 13
- 239000000295 fuel oil Substances 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000013049 sediment Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 238000004939 coking Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a residual ammonia water treatment system and a treatment method, which remove sediment generated after ammonia water is added with alkali by utilizing a ceramic microporous filter in a filtering mode, and overcome the defect of pipeline blockage caused by directly adding traditional alkali liquor into a residual ammonia water pipe. The sediment is prevented from being brought into the ammonia still, the stability of the resistance of the ammonia still is ensured, the ammonia still efficiency is improved, the resistance of the ammonia still can be reduced, and the service life of the ammonia still is prolonged. After the process and the device are applied, the service life of the tray is prolonged by at least more than 5 years, and huge replacement cost is saved.
Description
Technical Field
The invention belongs to the technical field of coking ammonia water treatment, and particularly relates to a residual ammonia water treatment system and a treatment method.
Background
In the current coal gas purification area of the coking plant, residual ammonia water is treated by an ammonia distillation tower, and NaOH solution is added to raise the PH of the ammonia water before the residual ammonia water enters the ammonia distillation tower for treatment so as to remove NH in the ammonia water 4+ . Most of the existing residual ammonia water alkali adding processes are to add alkali liquor into a residual ammonia water pipe in front of an ammonia distillation tower through a metering pump, and to set a mixer after alkali adding, to properly mix ammonia water and alkali liquor and then to enter the ammonia distillation tower. This process is often due to the pH increase in water after addition of alkali, ca in aqueous ammonia 2+ 、Mg 2+ Ion and CO in water 2 The precipitate of calcium carbonate and magnesium carbonate is produced and combined with tar and coal dust in water to form relatively adhered solid matter, and the precipitate is formed inside the conveying pipeline to result in blocking mixer, reducing the pipe diameter of ammonia conveying pipe and even blocking completely, so that ammonia water may not be conveyed normally and the production is affected. In order to solve this situation, many different attempts have been made by various enterprises, and none of them has been particularly well addressed. Finally, only the alkali-added pipeline can be removed for manual cleaningAnd the production is interrupted, which is time-consuming and labor-consuming.
In order to reduce the phenomenon that an ammonia water pipe is blocked after alkali addition in a coking plant at present, an alkali adding process is adjusted, the alkali adding pipe is directly added to the uppermost tray of an ammonia still, and is mixed with ammonia water in the uppermost tray, so that the problem of blocking the alkali adding pipe can be solved, but another serious problem is also generated, the ammonia still can be blocked, a precipitate can be directly precipitated and adhered to the tray, the resistance of the ammonia still is increased, the ammonia water treatment capacity is reduced, and the efficiency is reduced.
Disclosure of Invention
The invention aims to: in order to overcome the defects of the prior art, the invention provides a residual ammonia water treatment system which can effectively avoid the blockage of a residual ammonia water adding pipeline and an ammonia distillation tower.
Another object of the present invention is to provide a treatment method applied to the above-mentioned surplus ammonia water treatment system.
The technical scheme is as follows: the invention relates to a residual ammonia water treatment system, which comprises a microporous ceramic filter, a residual ammonia water adding device, an alkali adding device, an ammonia distillation tower, an oil emptying tank and a backflushing device, wherein the residual ammonia water adding device, the alkali adding device, the ammonia distillation tower, the oil emptying tank and the backflushing device are connected with the microporous ceramic filter; the residual ammonia water adding device sends oil-containing residual ammonia water into the microporous ceramic filter; the alkali adding device sends alkali liquor to the microporous ceramic filter; the alkali liquor and ammonia water mixed liquor after filtration in the microporous ceramic filter is sent into the ammonia distillation tower; the backflushing device sends backflushing liquid into the microporous ceramic filter and backflushes the interior of the microporous ceramic filter; and backwash products, floating oil and heavy oil in the microporous ceramic filter are discharged into the oil emptying tank.
Wherein the microporous ceramic filter comprises a shell and a filter cavity; the bottom of the shell is provided with a residual ammonia water inlet, the lower part of the shell is provided with a heavy oil drain port, the upper part of the shell is provided with a mixed liquid outlet, and the top of the shell is provided with a floating oil drain port.
The residual ammonia water adding device is used for feeding the residual ammonia water containing oil through the residual ammonia water inlet.
A spray header is arranged in the filter cavity and is positioned above the residual ammonia water inlet; and the alkali adding device sends alkali liquor into the filter cavity, and sprays and mixes the alkali liquor to the residual ammonia water containing oil through the spray header.
The ammonia still is connected with the mixed liquid outlet.
The oil emptying groove is connected with the floating oil drain port, the heavy oil drain port and the residual ammonia water inlet.
The backflushing device is connected with the mixed liquid outlet.
The residual ammonia water adding device comprises an oil-containing ammonia water tank, an ammonia water pump and an oil-containing residual ammonia water pipe; and the ammonia water pump sends the oil-containing residual ammonia water in the oil-containing ammonia water tank into the microporous ceramic filter through the oil-containing residual ammonia water pipe.
The alkali adding device comprises an alkali liquid tank, an alkali liquid metering pump and an alkali liquid pipe; the alkali liquor metering pump sends the alkali liquor in the alkali liquor tank to the microporous ceramic filter through the alkali liquor pipe.
The invention provides a treatment method applied to the residual ammonia water treatment system, which comprises the steps of adding 30-40% NaOH solution into a microporous ceramic filter to be mixed and contacted with oil-containing residual ammonia water, filtering, and then sending the filtered solution into an ammonia distillation tower; and (3) conveying both the floating oil and the heavy oil into an oil emptying tank, conveying residual ammonia water after oil removal into a microporous ceramic filter through a backflushing device at regular intervals, and flushing the filtering remainder into the oil emptying tank.
The beneficial effects are that: compared with the prior art, the invention removes the precipitate generated after adding the ammonia water into the alkali by utilizing the ceramic microporous filter in a filtering way, and overcomes the defect of pipeline blockage caused by directly adding the traditional alkali liquor into the residual ammonia water pipe. The sediment is prevented from being brought into the ammonia still, the stability of the resistance of the ammonia still is ensured, the ammonia still efficiency is improved, the resistance of the ammonia still can be reduced, and the service life of the ammonia still is prolonged. After the process and the device are applied, the service life of the tray is prolonged by at least more than 5 years, and huge replacement cost is saved.
Drawings
FIG. 1 is a schematic diagram of a residual ammonia water treatment system according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
According to the embodiment, the original ceramic microporous filter of the coking plant is modified, and the filtering function of the ceramic microporous filter is utilized, so that the mixing of alkali liquor and residual ammonia water containing oil is realized by taking the ceramic microporous filter as a carrier.
As shown in fig. 1, a residual ammonia water inlet 2 is formed at the bottom of the shell of the ceramic microporous filter 1, a heavy oil drain port 3 is formed at the lower part, a mixed liquid outlet 4 is formed at the upper part, and a floating oil drain port 5 is formed at the top. And an atomization spray header 6 is arranged above the residual ammonia water inlet 2 in the filter cavity.
The residual ammonia water adding device comprises an oil-containing ammonia water tank 7, an ammonia water pump 8 and an oil-containing residual ammonia water pipe 9. The oil-containing residual ammonia water pipe 9 is connected with the oil ammonia water tank 7, the ammonia water pump 8 and the residual ammonia water inlet 2. The ammonia water pump 8 is used for sending the oil-containing residual ammonia water in the oil-containing ammonia water tank 7 into the residual ammonia water inlet 2 through the oil-containing residual ammonia water pipe 9, and the residual ammonia water enters the filter cavity of the microporous ceramic filter 1.
The alkali adding device comprises an alkali liquid tank 10, an alkali liquid metering pump 11 and an alkali liquid pipe 12. The alkali liquor pipe 12 is connected with the alkali liquor tank 10 and the alkali liquor metering pump 11, and is connected with the spray header 6 in the filter cavity of the microporous ceramic filter 1 from the vicinity of the residual ammonia water inlet 2. The alkali liquor metering pump 11 sends 30-40% NaOH alkali solution in the alkali liquor tank 10 into the microporous ceramic filter 1 through the alkali liquor pipe 12, and sprays the residual ammonia water containing oil through the spray header 6, so that the alkali liquor and the microporous ceramic filter are in reverse contact and fully mixed.
The mixed liquid dispersedly flows in the filter cavity, then enters the tube pass of the ceramic filter tube, flows into the tube shell through the tube pass, and is conveyed to the ammonia still from the mixed liquid outlet 4 at the upper part.
In the process, heavy oil, coal dust, sediments and the like which are filtered in the tube pass are periodically filtered by a backflushing device, oil removal residual ammonia water from the ceramic microporous filter 1 is utilized, and the heavy oil, the coal dust, the sediments and the like are backflushed from the ceramic shell layer to the tube layer in a disturbance mode and flow into an oil emptying groove. The floating oil floating at the top of the filter cavity is discharged to an oil discharge groove through a floating oil discharge port 5. The residual ammonia water with clean filter shell pass discharges the deposited very small amount of heavy oil into the oil emptying tank through the heavy oil discharging pipe at the bottom of the filter.
After the invention is adopted for transformation, the ammonia distillation tower tray with the diameter of DN2000 is used as a basis for measurement and calculation, so that the replacement cost for 2 times can be reduced, and the maintenance cost is greatly reduced.
Claims (8)
1. The residual ammonia water treatment system is characterized by comprising a microporous ceramic filter (1), and a residual ammonia water adding device, an alkali adding device, an ammonia distillation tower, an oil emptying tank and a backflushing device which are connected with the microporous ceramic filter (1); the microporous ceramic filter (1) comprises a shell and a filter cavity, wherein the bottom of the shell is provided with a residual ammonia water inlet (2), the lower part of the shell is provided with a heavy oil drain port (3), the upper part of the shell is provided with a mixed liquid outlet (4), the top of the shell is provided with a floating oil drain port (5), the filter cavity is internally provided with a spray header (6), and the spray header (6) is positioned above the residual ammonia water inlet (2);
the residual ammonia water adding device sends oil-containing residual ammonia water into the microporous ceramic filter (1);
the alkali adding device sends alkali liquor into the microporous ceramic filter (1), and sprays and mixes the alkali liquor to the residual ammonia water containing oil through the spray header (6);
the alkali liquor and ammonia water mixed liquor after filtration in the microporous ceramic filter (1) is sent into the ammonia distillation tower;
the backflushing device sends backflushing liquid into the microporous ceramic filter (1) and backflushes the interior of the microporous ceramic filter;
and backwash products, floating oil and heavy oil in the microporous ceramic filter (1) are discharged into the oil emptying tank.
2. The system for treating residual ammonia according to claim 1, wherein the residual ammonia adding device feeds residual ammonia containing oil through the residual ammonia inlet (2).
3. A surplus ammonia treatment system according to claim 1, characterized in that the ammonia still is connected to the mixed liquor outlet (4).
4. The residual ammonia water treatment system according to claim 1, wherein the oil drain tank is connected to the floating oil drain (5), the heavy oil drain (3) and the residual ammonia water inlet (2).
5. A surplus ammonia treatment system according to claim 1, characterized in that the backflushing device is connected to the mixed liquor outlet (4).
6. The residual ammonia water treatment system according to claim 1, wherein the residual ammonia water adding device comprises an oil-containing ammonia water tank (7), an ammonia water pump (8), and an oil-containing residual ammonia water pipe (9); the ammonia water pump (8) sends the oil-containing residual ammonia water in the oil-containing ammonia water tank (7) into the microporous ceramic filter (1) through the oil-containing residual ammonia water pipe (9).
7. The residual ammonia water treatment system according to claim 1, wherein the alkali adding device comprises an alkali liquid tank (10), an alkali liquid metering pump (11) and an alkali liquid pipe (12); the alkali liquor metering pump (11) sends the alkali liquor in the alkali liquor tank (10) into the microporous ceramic filter (1) through the alkali liquor pipe (12).
8. A treatment method applied to the residual ammonia water treatment system of claim 1, which is characterized in that 30-40% NaOH solution is added into a microporous ceramic filter to be mixed and contacted with oil-containing residual ammonia water, and the mixture is filtered and then sent into an ammonia distillation tower;
and (3) conveying both the floating oil and the heavy oil into an oil emptying tank, conveying residual ammonia water after oil removal into a microporous ceramic filter through a backflushing device at regular intervals, and flushing the filtering remainder into the oil emptying tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267340.7A CN114195282B (en) | 2021-10-27 | 2021-10-27 | Residual ammonia water treatment system and treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267340.7A CN114195282B (en) | 2021-10-27 | 2021-10-27 | Residual ammonia water treatment system and treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114195282A CN114195282A (en) | 2022-03-18 |
| CN114195282B true CN114195282B (en) | 2024-02-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111267340.7A Active CN114195282B (en) | 2021-10-27 | 2021-10-27 | Residual ammonia water treatment system and treatment method |
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| Country | Link |
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| CN (1) | CN114195282B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202605784U (en) * | 2012-06-08 | 2012-12-19 | 南京钢铁股份有限公司 | Oil-water separating device for coking crude benzol emptying oil |
| CN204162551U (en) * | 2014-09-05 | 2015-02-18 | 乐山东承新材料有限公司 | A kind of ammoniacal liquor filtration unit |
| CN204727713U (en) * | 2015-06-10 | 2015-10-28 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of ammonia still process raw material ammonia water filtration, purification system |
| CN105174532A (en) * | 2015-08-13 | 2015-12-23 | 江苏好山好水环保科技有限公司 | Pretreatment system for prevention of scaling of high ammonia-nitrogen industrial wastewater before ammonia distillation and treatment method thereof |
| CN108793555A (en) * | 2018-06-13 | 2018-11-13 | 苏州永峰联环保科技有限公司 | Remained ammonia treatment process and its processing system |
| CN212076726U (en) * | 2020-01-02 | 2020-12-04 | 山西潞安羿神能源有限责任公司 | Anti-blocking ammonia distillation device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3004455A4 (en) * | 2013-05-29 | 2017-01-18 | SunCarbon AB | A method for the treatment of spent pulping liquor for the removal and production of a lignin containing product |
-
2021
- 2021-10-27 CN CN202111267340.7A patent/CN114195282B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202605784U (en) * | 2012-06-08 | 2012-12-19 | 南京钢铁股份有限公司 | Oil-water separating device for coking crude benzol emptying oil |
| CN204162551U (en) * | 2014-09-05 | 2015-02-18 | 乐山东承新材料有限公司 | A kind of ammoniacal liquor filtration unit |
| CN204727713U (en) * | 2015-06-10 | 2015-10-28 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of ammonia still process raw material ammonia water filtration, purification system |
| CN105174532A (en) * | 2015-08-13 | 2015-12-23 | 江苏好山好水环保科技有限公司 | Pretreatment system for prevention of scaling of high ammonia-nitrogen industrial wastewater before ammonia distillation and treatment method thereof |
| CN108793555A (en) * | 2018-06-13 | 2018-11-13 | 苏州永峰联环保科技有限公司 | Remained ammonia treatment process and its processing system |
| CN212076726U (en) * | 2020-01-02 | 2020-12-04 | 山西潞安羿神能源有限责任公司 | Anti-blocking ammonia distillation device |
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| CN114195282A (en) | 2022-03-18 |
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