CN110683669A - Ammonia water treatment process for coke oven raw gas - Google Patents
Ammonia water treatment process for coke oven raw gas Download PDFInfo
- Publication number
- CN110683669A CN110683669A CN201911005131.8A CN201911005131A CN110683669A CN 110683669 A CN110683669 A CN 110683669A CN 201911005131 A CN201911005131 A CN 201911005131A CN 110683669 A CN110683669 A CN 110683669A
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- Prior art keywords
- ammonia water
- tar
- stage
- treatment process
- groove
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- 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)
- Physical Water Treatments (AREA)
Abstract
The invention relates to a coke oven crude gas ammonia water treatment process, which comprises a five-stage treatment process consisting of a gas-liquid separator, a mechanical slag scraping groove, a tar ammonia water separation groove, an air flotation oil removing machine, a residual ammonia water groove and an exhaust ceramic filter which are connected in sequence; the tar ammonia water separated by the gas-liquid separator enters a first-stage mechanical slag scraping groove, the ammonia water without tar residues automatically flows into a second-stage tar ammonia water separation groove, the tar residues are statically placed, precipitated and separated, then the ammonia water is pumped to a third-stage air flotation oil removing machine by using an air flotation intermediate pump, the bottom of the ammonia water is subjected to low-pressure steam bubbling to remove the tar and then enters a fourth-stage residual ammonia water tank which is used in series, the residual ammonia water tank is statically placed to separate out the tar residues and impurities, and then the ammonia water is sent to a fifth-stage ceramic filter to remove the tar and then sent. The invention has strong adaptability, stable and flexible operation and low energy consumption.
Description
Technical Field
The invention relates to an efficient ammonia water treatment process for a coke oven gas purification system, in particular to a coke oven crude gas ammonia water treatment process.
Background
At present, the widely adopted ammonia water treatment process in China mainly adopts a horizontal mechanized ammonia water clarifying tank process and a vertical tar ammonia water separation tank process.
The horizontal mechanized ammonia water clarifying tank process comprises the following steps: the tar and the ammonia water separated by the gas-liquid separator enter a mechanized ammonia water clarifying tank, and the ammonia water, the tar and the tar residues are separated in the mechanized ammonia water clarifying tank. The ammonia water on the upper part automatically flows into a circulating ammonia water intermediate tank, then is pumped to a gas collecting pipe of a coke oven by a circulating ammonia water pump to spray cooled coal gas, the residual ammonia water is sent into a residual ammonia water storage tank after tar removal by a tar remover, and the residual ammonia water is used for pumping the ammonium sulfate section to remove ammonia distillation. The tar at the lower part of the mechanized ammonia water clarifying tank automatically flows into a tar intermediate tank, then is sent into a tar tank by a tar intermediate pump, and the tar is heated, dehydrated, kept stand and separated, and then is pumped into an oil depot by the tar. The tar residue scraped from the lower part of the mechanized ammonia water clarifying tank is sent to a coal preparation workshop. The process has poor operating environment and does not meet the current environmental protection requirement.
The vertical tar and ammonia water separation tank process comprises the following steps: the tar and the ammonia water separated by the gas-liquid separator firstly enter a tar residue pre-separator, and the tar, the ammonia water and the tar residue are separated. And (4) the tar ammonia water from the tar residue pre-separator enters a tar ammonia water separation tank, and the ammonia water and the tar are separated. The ammonia water overflowing from the top of the ammonia water tank on the upper part of the tar ammonia water separation tank firstly enters a residual ammonia water storage tank, is pumped out by a circulating ammonia water pump and is sent to a gas collecting pipe of the coke oven to spray and cool coal gas. And (3) removing most of tar in the ammonia water by standing and separating the residual ammonia water generated in the coking process. The ammonia water in the storage tank is pumped to an ammonia distillation unit by a pump. The tar residues are not discharged outside in the process, and the quality of the circulating ammonia water of the system can hardly meet the use requirement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the novel energy-saving device which is strong in adaptability, stable and flexible in operation and low in energy consumption.
In order to solve the technical problem, the invention is realized as follows:
the ammonia water treatment process of the coke oven raw gas is characterized by comprising the following steps: the device comprises a five-stage treatment process consisting of a gas-liquid separator, a mechanical slag scraping groove, a tar and ammonia water separation groove, an air flotation oil removing machine, a residual ammonia water groove and an exhaust ceramic filter which are connected in sequence;
the tar ammonia water separated by the gas-liquid separator enters a first-stage mechanical slag scraping groove, the ammonia water without tar residues automatically flows into a second-stage tar ammonia water separation groove, the tar residues are statically placed, precipitated and separated, then the ammonia water is pumped to a third-stage air flotation oil removing machine by using an air flotation intermediate pump, the bottom of the ammonia water is subjected to low-pressure steam bubbling to remove the tar and then enters a fourth-stage residual ammonia water tank which is used in series, the residual ammonia water tank is statically placed to separate out the tar residues and impurities, and then the ammonia water is sent to a fifth-stage ceramic filter to remove the tar and then sent.
The ammonia water treatment process of the coke oven raw gas is characterized by comprising the following steps: the mechanical slag scraping groove is a closed environment-friendly mechanical slag scraping groove.
The ammonia water treatment process of the coke oven raw gas is characterized by comprising the following steps: and the ammonia water is forced to enter a third-stage air floatation oil remover by adopting a centrifugal pump.
The ammonia water treatment process of the coke oven raw gas is characterized by comprising the following steps: the tar ammonia water separating tank has two, and the tar ammonia water separating tank are used in series or in parallel.
The invention has the beneficial effects that: the device is environment-friendly, free of waste gas discharge, small in occupied area and flexible in placement.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1: a coke oven raw gas ammonia water treatment process comprises a five-stage treatment process consisting of a gas-liquid separator 1, a mechanical slag scraping groove 2, a tar ammonia water separation groove 3, an air flotation oil removing machine 4, a residual ammonia water groove 5 and an exhaust ceramic filter 6 which are connected in sequence;
the tar ammonia water separated by the gas-liquid separator enters a first-stage mechanical slag scraping groove, the ammonia water without tar residues automatically flows into a second-stage tar ammonia water separation groove, the tar residues are statically placed, precipitated and separated, then the ammonia water is pumped to a third-stage air flotation oil removing machine by using an air flotation intermediate pump, the bottom of the ammonia water is subjected to low-pressure steam bubbling to remove the tar and then enters a fourth-stage residual ammonia water tank which is used in series, the residual ammonia water tank is statically placed to separate out the tar residues and impurities, and then the ammonia water is sent to a fifth-stage ceramic filter to remove the tar and then sent.
The ammonia water treatment process of the coke oven raw gas is characterized by comprising the following steps: the mechanical slag scraping groove is a closed environment-friendly mechanical slag scraping groove, tar residue is scraped, and waste gas is recycled in a unified mode.
The ammonia water treatment process of the coke oven raw gas is characterized by comprising the following steps: the ammonia water is forced to enter a third-stage air floatation oil removing machine by adopting a centrifugal pump 7, and the continuity of the system is enhanced.
The ammonia water treatment process of the coke oven raw gas is characterized by comprising the following steps: the tar-ammonia water separation tank is provided with two tar-ammonia water separation tanks, and the two tar-ammonia water separation tanks are used in series or in parallel, and are used in series to increase the retention time and improve the treatment effect.
Compared with the traditional process, the novel demulsifier is adopted in the invention, and the generation of oil-water mixture is greatly reduced.
Claims (4)
1. The ammonia water treatment process of the coke oven raw gas is characterized by comprising the following steps: the device comprises a five-stage treatment process consisting of a gas-liquid separator, a mechanical slag scraping groove, a tar and ammonia water separation groove, an air flotation oil removing machine, a residual ammonia water groove and an exhaust ceramic filter which are connected in sequence;
the tar ammonia water separated by the gas-liquid separator enters a first-stage mechanical slag scraping groove, the ammonia water without tar residues automatically flows into a second-stage tar ammonia water separation groove, the tar residues are statically placed, precipitated and separated, then the ammonia water is pumped to a third-stage air flotation oil removing machine by using an air flotation intermediate pump, the bottom of the ammonia water is subjected to low-pressure steam bubbling to remove the tar and then enters a fourth-stage residual ammonia water tank which is used in series, the residual ammonia water tank is statically placed to separate out the tar residues and impurities, and then the ammonia water is sent to a fifth-stage ceramic filter to remove the tar and then sent.
2. The coke oven raw gas ammonia water treatment process of claim 1, characterized in that: the mechanical slag scraping groove is a closed environment-friendly mechanical slag scraping groove.
3. The coke oven raw gas ammonia water treatment process of claim 1, characterized in that: and the ammonia water is forced to enter a third-stage air floatation oil remover by adopting a centrifugal pump.
4. The coke oven raw gas ammonia water treatment process of claim 1, characterized in that: the tar ammonia water separating tank has two, and the tar ammonia water separating tank are used in series or in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911005131.8A CN110683669A (en) | 2019-10-22 | 2019-10-22 | Ammonia water treatment process for coke oven raw gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911005131.8A CN110683669A (en) | 2019-10-22 | 2019-10-22 | Ammonia water treatment process for coke oven raw gas |
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| Publication Number | Publication Date |
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| CN110683669A true CN110683669A (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911005131.8A Pending CN110683669A (en) | 2019-10-22 | 2019-10-22 | Ammonia water treatment process for coke oven raw gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111214849A (en) * | 2020-01-22 | 2020-06-02 | 临涣焦化股份有限公司 | Tar and ammonia water separation device and use method thereof |
| CN114405067A (en) * | 2022-03-03 | 2022-04-29 | 广东韶钢松山股份有限公司 | Separator of tar aqueous ammonia |
| CN114653108A (en) * | 2022-04-15 | 2022-06-24 | 山东钢铁集团日照有限公司 | Separation process of coal coking tar residues |
| CN114850169A (en) * | 2022-04-15 | 2022-08-05 | 山东钢铁集团日照有限公司 | Method for reducing moisture content in tar residue |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204824404U (en) * | 2015-06-30 | 2015-12-02 | 甘肃宏汇能源化工有限公司 | Tar aqueous ammonia separation clean system |
| CN105381648A (en) * | 2015-12-19 | 2016-03-09 | 太原重工股份有限公司 | Tar ammonia separation system and tar ammonia separation method |
-
2019
- 2019-10-22 CN CN201911005131.8A patent/CN110683669A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204824404U (en) * | 2015-06-30 | 2015-12-02 | 甘肃宏汇能源化工有限公司 | Tar aqueous ammonia separation clean system |
| CN105381648A (en) * | 2015-12-19 | 2016-03-09 | 太原重工股份有限公司 | Tar ammonia separation system and tar ammonia separation method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111214849A (en) * | 2020-01-22 | 2020-06-02 | 临涣焦化股份有限公司 | Tar and ammonia water separation device and use method thereof |
| CN114405067A (en) * | 2022-03-03 | 2022-04-29 | 广东韶钢松山股份有限公司 | Separator of tar aqueous ammonia |
| CN114653108A (en) * | 2022-04-15 | 2022-06-24 | 山东钢铁集团日照有限公司 | Separation process of coal coking tar residues |
| CN114850169A (en) * | 2022-04-15 | 2022-08-05 | 山东钢铁集团日照有限公司 | Method for reducing moisture content in tar residue |
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Application publication date: 20200114 |
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