CN111348717A - High-concentration ammonia nitrogen sewage adsorption denitrification pretreatment process and assembly line thereof - Google Patents
High-concentration ammonia nitrogen sewage adsorption denitrification pretreatment process and assembly line thereof Download PDFInfo
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- CN111348717A CN111348717A CN202010240466.4A CN202010240466A CN111348717A CN 111348717 A CN111348717 A CN 111348717A CN 202010240466 A CN202010240466 A CN 202010240466A CN 111348717 A CN111348717 A CN 111348717A
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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Abstract
The invention relates to a high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment production line, which has the advantage of being capable of reducing the ammonia nitrogen concentration in sewage. The utility model provides a high concentration ammonia nitrogen sewage adsorbs denitrogenation preliminary treatment assembly line, includes filter equipment, adsorption equipment, regenerating unit and goes out the liquid device, filter equipment includes security filter and collects the storage water tank of discharging water behind security filter, adsorption equipment includes two at least internally mounted have the adsorption tanks of zeolite, regenerating unit is including the regeneration fluid reservoir of storing regeneration alkali lye and the washing fluid reservoir of storing demineralized water, storage water tank, regeneration fluid reservoir and washing fluid reservoir all are linked together with the adsorption tanks, it is including connecting the outlet pipe on the adsorption tanks to go out the liquid device. The sewage is primarily filtered by the cartridge filter to remove suspended matters and oil stains in the sewage. Then the sewage is conveyed into an adsorption tank provided with zeolite, and the ammonia nitrogen in the sewage is adsorbed by the adsorption tank, so that the ammonia nitrogen concentration in the sewage is reduced.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment process and a production line thereof.
Background
The prior patent with the publication number of CN101200339B discloses a sewage treatment method. The method comprises the following steps: firstly, pretreating sewage, and performing adsorption and precipitation treatment; secondly, mixing the sewage treated in the first step with the substances reflowed from the aerobic tank and the secondary sedimentation tank, and allowing the mixed sewage to enter an anoxic tank to complete denitrification and degradation of part of organic pollutants; thirdly, the water flow treated by the anoxic tank enters the aerobic tank added with the biological filler; fourthly, carrying out precipitation treatment, and discharging purified water. The improved new sewage treatment method enhances the nitrogen and phosphorus removal capability of the original AB sewage treatment process, can improve the removal capability of the sewage treatment plant on organic matters under the condition of not increasing structures, meets the requirements of capacity expansion and efficiency improvement, and has remarkable economic benefit.
The above prior art solutions have the following drawbacks: in the scheme, the pretreatment is to remove suspended impurities in the sewage through a grit chamber. When high-concentration ammonia nitrogen sewage is treated, the pretreatment needs to remove suspended impurities and also needs to absorb and reduce the ammonia nitrogen concentration in the sewage so as to accelerate the treatment speed of the subsequent process.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide a high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment production line, which has the advantage of reducing the ammonia nitrogen concentration in sewage.
The above object of the present invention is achieved by the following technical solutions: the utility model provides a high concentration ammonia nitrogen sewage adsorbs denitrogenation preliminary treatment assembly line, includes filter equipment, adsorption equipment, regenerating unit and goes out the liquid device, filter equipment includes security filter and collects the storage water tank of discharging water behind security filter, adsorption equipment includes two at least internally mounted have the adsorption tanks of zeolite, regenerating unit is including the regeneration fluid reservoir of storing regeneration alkali lye and the washing fluid reservoir of storing demineralized water, storage water tank, regeneration fluid reservoir and washing fluid reservoir all are linked together with the adsorption tanks, it is including connecting the outlet pipe on the adsorption tanks to go out the liquid device.
Through adopting above-mentioned technical scheme, carry out prefilter with sewage through the safety filter, remove suspended solid and the greasy dirt in the sewage. Then the sewage is conveyed into an adsorption tank provided with zeolite, and the ammonia nitrogen in the sewage is adsorbed by the adsorption tank, so that the ammonia nitrogen concentration in the sewage is reduced. After a period of time, switching the adsorption tanks, regenerating the adsorption tanks after use by regenerated alkali liquor, and washing the adsorption tanks by softened water for next use.
The present invention in a preferred example may be further configured to: the filter device further comprises a second water pump for conveying water in the water storage tank outwards, a first water conveying valve for controlling the opening and closing of a pipeline is installed on the pipeline between the second water pump and the water storage tank, the three adsorption tanks are respectively a first adsorption tank, a second adsorption tank and a standby adsorption tank, and a water outlet of the second water pump is communicated with the first adsorption tank, the second adsorption tank and the standby adsorption tank through a first pipeline assembly.
Through adopting above-mentioned technical scheme, outwards carry the sewage in the storage water tank through the second water pump, close first water delivery valve when out of work and avoid sewage outflow. Set up three adsorption tanks, wherein two adsorption tanks commonly used use in turn so that sewage treatment can incessantly go on, another spare part as the unable during operation of adsorption tank commonly used.
The present invention in a preferred example may be further configured to: the first pipeline assembly comprises a first water inlet pipe connected with the first adsorption tank, a second water inlet pipe connected with the second adsorption tank and a standby water inlet pipe connected with the standby adsorption tank, the first water inlet pipe and the second water inlet pipe are connected through a first electric three-way reversing valve, and two switching ends of the first electric three-way reversing valve are respectively communicated with the first water inlet pipe and the second water inlet pipe; the fixed end of the first electric three-way reversing valve is connected with a second electric three-way reversing valve, two switching ends of the second electric three-way reversing valve are respectively communicated with the first electric three-way reversing valve and the standby water inlet pipe, and the fixed end of the second electric three-way reversing valve is communicated with a water outlet of the second water pump.
Through adopting above-mentioned technical scheme, switch through first electronic tee bend switching-over valve control first adsorption tank and second adsorption tube is used. Switch to reserve adsorption tank and use when the adsorption tank commonly used through the electronic tee bend switching-over valve of second is unable for the in-process sewage treatment who restores the adsorption tank commonly used can normally go on.
The present invention in a preferred example may be further configured to: a third water pump for outwards conveying regenerated alkali liquor is installed on the side surface of the regenerated liquid tank, a fourth water pump for outwards conveying softened water is installed on the side surface of the cleaning liquid tank, a second water conveying valve is installed on a pipeline between the third water pump and the regenerated liquid tank, and a third water conveying valve is installed on a pipeline between the fourth water pump and the cleaning liquid tank; the water outlets of the third water pump and the fourth water pump are communicated with a regeneration pipeline, and the regeneration pipeline is communicated with the first adsorption tank, the second adsorption tank and the standby adsorption tank through a second pipeline assembly.
Through adopting above-mentioned technical scheme, set up the third water pump and carry regeneration alkali lye, carry the demineralized water of washing usefulness through the fourth water pump. And the pipeline is closed through the second water delivery valve and the third water delivery valve when the regeneration adsorption tank is not needed so as to prevent regenerated alkali liquor and softened water from flowing out.
The present invention in a preferred example may be further configured to: the liquid outlet device comprises three water outlet pipes which are respectively connected to the side walls of the first adsorption tank, the second adsorption tank and the standby adsorption tank and are close to the upper end positions, and an ammonia nitrogen analyzer and a water outlet valve are mounted on each water outlet pipe.
Through adopting above-mentioned technical scheme, through three outlet pipe water storage, set up ammonia nitrogen analysis appearance and detect the ammonia nitrogen concentration in the sewage, when ammonia nitrogen concentration surpassed the setting value, mean that the ammonia nitrogen adsorption in the adsorption tank is close the saturation, need switch the adsorption tank and regenerate to the adsorption tank of saturation this moment.
The present invention in a preferred example may be further configured to: and the position between the water outlet valve and the adsorption tank on the water outlet pipe is communicated with a recovery pipe, the other ends of the three recovery pipes are communicated with the same alkali liquor recovery tank, and each recovery pipe is provided with a recovery valve.
Through adopting above-mentioned technical scheme, set up the recovery tube and come to retrieve alkali lye, close the outlet valve, open the recovery valve at the recovery in-process for regeneration alkali lye can not discharge in follow-up other sewage treatment plant through the outlet pipe, but stores in the alkali lye collection box, waits to retrieve alkali lye.
The second purpose of the invention is to provide a pretreatment process for adsorbing and denitrifying high-concentration ammonia nitrogen sewage, which has the advantage of reducing the ammonia nitrogen concentration in the sewage.
The above object of the present invention is achieved by the following technical solutions:
a high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment process comprises the following steps:
s1, filtering;
s2, adsorbing ammonia nitrogen;
conveying the sewage into a first adsorption tank/a second adsorption tank, adsorbing ammonia nitrogen by the sewage through the first adsorption tank/the second adsorption tank, and discharging the sewage through a water outlet pipe;
s3, switching adsorption tanks;
s4, adsorption regeneration;
and S5, flushing.
By adopting the technical scheme, suspended impurities and oil stains in the sewage are removed, and meanwhile, the ammonia nitrogen concentration in the sewage is reduced.
The present invention in a preferred example may be further configured to: in S3, when an ammonia nitrogen analyzer on a water outlet pipe detects that the concentration of ammonia nitrogen in the outputted sewage is greater than a set value, a signal is sent out, and a first electric three-way reversing valve of a first pipeline assembly is switched; if the ammonia nitrogen analyzer detects that the signal sending time is far away from the last signal sending time regeneration and flushing time, the second electric three-way reversing valve is switched, and an alarm is sent.
By adopting the technical scheme, the adsorption tanks are switched when the ammonia nitrogen concentration is greater than a set value. When the signal sending time of two times is less than the regeneration and flushing time, the previous adsorption tank is not regenerated, and the adsorption tank has operation failure at the moment, so that the adsorption tank cannot work continuously, and therefore an alarm needs to be given to prompt maintenance personnel to repair the common adsorption tank. And simultaneously, switching to a standby adsorption tank to maintain normal sewage treatment.
The present invention in a preferred example may be further configured to: in S4, after the adsorption tanks are switched, the corresponding water outlet valve of the adsorption tank is closed, and the recovery valve is opened; the second pipeline assembly is switched to a state communicated with the adsorption tank communicated with the first pipeline assembly before switching, the second water delivery valve is opened, and the third water pump is started and continuously delivers the regenerated alkali liquor within a set time.
Through adopting above-mentioned technical scheme, switch behind the adsorption tanks, come regeneration adsorption tanks through input regeneration alkali lye to make the adsorption tanks can follow-up reuse adsorb ammonia nitrogen.
The present invention in a preferred example may be further configured to: in S5, after the third water pump continuously operates for a set time, closing the third water pump and the second water delivery valve, opening the third water delivery valve, and starting the fourth water pump; and the fourth water pump stops after running for a set time, and closes the recovery valve and opens the water outlet valve.
Through adopting above-mentioned technical scheme, wash through the demineralized water and retrieve to the alkali lye collection box in with remaining regeneration alkali lye in the adsorption tank is whole, also avoid alkali lye to get into follow-up sewage treatment plant when avoiding alkali lye extravagant.
In summary, the invention includes at least one of the following beneficial technical effects:
1. carry out prefilter with sewage through cartridge filter, remove suspended solid and the greasy dirt in the aquatic, then carry sewage into the adsorption tank who installs zeolite, adsorb the ammonia nitrogen in the sewage through the adsorption tank, reduce the ammonia nitrogen concentration in the sewage.
2. Set up three adsorption tanks, wherein two adsorption tanks commonly used use in turn so that sewage treatment can incessantly go on, and another spare part as the unable during operation of adsorption tank commonly used maintains the assembly line and effectively operates for a long time.
Drawings
FIG. 1 is a schematic flow diagram of a high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment production line.
Reference numerals: 1. a cartridge filter; 2. a first water pump; 3. a water storage tank; 4. a second water pump; 5. a first water delivery valve; 6. a first adsorption tank; 7. a second adsorption tank; 8. a standby adsorption tank; 9. a first water inlet pipe; 10. a second water inlet pipe; 11. a spare water inlet pipe; 12. a first electrically operated three-way directional valve; 13. a second electrically operated three-way reversing valve; 14. a regenerated liquid tank; 15. cleaning a liquid tank; 16. a third water pump; 17. a fourth water pump; 18. a second water delivery valve; 19. a third water delivery valve; 20. a water outlet pipe; 21. an ammonia nitrogen analyzer; 22. a water outlet valve; 23. a recovery pipe; 24. an alkali liquor recovery tank; 25. and (6) a recovery valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in figure 1, the high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment production line comprises a filtering device, an adsorption device, a regeneration device and a liquid outlet device.
As shown in fig. 1, the filtering apparatus includes a cartridge filter 1, a first water pump 2 for supplying water into the cartridge filter 1, a storage tank 3 for collecting water discharged after passing through the cartridge filter 1, and a second water pump 4 for delivering water in the storage tank 3 to the outside. The main body of the cartridge filter 1 is a filter tank using modified fiber as a filler. A first water delivery valve 5 for controlling the opening and closing of the pipeline is arranged on the pipeline between the second water pump 4 and the water storage tank 3.
As shown in fig. 1, the adsorption device includes three adsorption tanks, i.e., a first adsorption tank 6, a second adsorption tank 7 and a standby adsorption tank 8, in which zeolite is disposed, and a water outlet of the second water pump 4 is communicated with the first adsorption tank 6, the second adsorption tank 7 and the standby adsorption tank 8 through a first pipe assembly. The first pipeline component comprises a first water inlet pipe 9 connected to the side wall of the first adsorption tank 6 and close to the lower end position, a second water inlet pipe 10 connected to the side wall of the second adsorption tank 7 and close to the lower end position, and a standby water inlet pipe 11 connected to the side wall of the standby adsorption tank 8 and close to the lower end position. The first water inlet pipe 9 and the second water inlet pipe 10 are connected through a first electric three-way reversing valve 12, and two switching ends of the first electric three-way reversing valve 12 are respectively communicated with the first water inlet pipe 9 and the second water inlet pipe 10. The fixed end of the first electric three-way reversing valve 12 is connected with a second electric three-way reversing valve 13, two switching ends of the second electric three-way reversing valve 13 are respectively communicated with the first electric three-way reversing valve 12 and the standby water inlet pipe 11, and the fixed end of the second electric three-way reversing valve 13 is communicated with a water outlet of the second water pump 4.
As shown in figure 1, the regeneration device comprises a regeneration liquid tank 14 for storing regenerated alkali liquor and a cleaning liquid tank 15 for storing softened water, a third water pump 16 for conveying regenerated alkali liquor outwards is arranged on the side surface of the regeneration liquid tank 14, and a fourth water pump 17 for conveying softened water outwards is arranged on the side surface of the cleaning liquid tank 15. A second water delivery valve 18 is arranged on a pipeline between the third water pump 16 and the regeneration liquid tank 14, and a third water delivery valve 19 is arranged on a pipeline between the fourth water pump 17 and the cleaning liquid tank 15. The water outlets of the third water pump 16 and the fourth water pump 17 are communicated with a regeneration pipeline, the regeneration pipeline is communicated with the first adsorption tank 6, the second adsorption tank 7 and the standby adsorption tank 8 through a second pipeline assembly, and the structure of the second pipeline assembly is the same as that of the first pipeline assembly.
As shown in fig. 1, the liquid outlet device comprises three water outlet pipes 20 respectively connected to the side walls of the first adsorption tank 6, the second adsorption tank 7 and the spare adsorption tank 8 near the upper end, and each water outlet pipe 20 is provided with an ammonia nitrogen analyzer 21 and a water outlet valve 22. A recovery pipe 23 is communicated with the position between the water outlet valve 22 and the adsorption tank on the water outlet pipe 20, the other ends of the three recovery pipes 23 are communicated with the same alkali liquor recovery tank 24, and a recovery valve 25 is arranged on each recovery pipe 23.
Example two:
a high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment process comprises the following steps:
s1, filtering
High-concentration ammonia nitrogen sewage is introduced into a security filter 1, suspended matters and oil stains in water are removed through the security filter 1, the bed layer is prevented from being blocked by the suspended matters, and the service life of zeolite is shortened. The filtered water is conveyed to the water storage tank 3 for buffering.
S2 adsorption of ammonia nitrogen
The sewage in the water storage tank 3 is conveyed into the first adsorption tank 6/the second adsorption tank 7 at the speed of 80m3/h, and the sewage is discharged through the water outlet pipe 20 after ammonia nitrogen is adsorbed by the first adsorption tank 6/the second adsorption tank 7.
S3 switching adsorption tank
After a period of time, when the ammonia nitrogen analyzer 21 on the water outlet pipe 20 detects that the ammonia nitrogen concentration in the outputted sewage is greater than 100mg/L, a signal is sent out, and the first electric three-way reversing valve 12 of the first pipeline assembly is switched, so that the sewage is not conveyed into the original first adsorption tank 6/second adsorption tank 7, but is conveyed into the second adsorption tank 7/first adsorption tank 6. The sewage is discharged through a water outlet pipe 20 after ammonia nitrogen is adsorbed by the second adsorption tank 7/the first adsorption tank 6. If the time of the signal sending is detected by the ammonia nitrogen analyzer 21 to be less than 4 hours from the last time of the signal sending, the second electric three-way reversing valve 13 is switched, so that the sewage enters the standby adsorption tank 8, and an alarm is sent out.
S4, adsorption regeneration
After the adsorption tanks are switched, the second pipeline assembly is switched to be communicated with the adsorption tank communicated with the first pipeline assembly before switching, the second water delivery valve 18 is opened, the third water pump 16 is started, and regenerated alkali liquor is delivered into the adsorption tanks through the third water pump 16. At this time, the water outlet valve 22 corresponding to the adsorption tank is closed, the recovery valve 25 is opened, and the regenerated alkali liquor passes through the adsorption tank and then enters the alkali liquor recovery tank 24 through the recovery pipe 23 for recovery.
S5, washing
After the third water pump 16 continuously conveys the regenerated alkali liquor for 4 hours, the third water pump 16 and the second water conveying valve 18 are closed, and the fourth water pump 17 and the third water conveying valve 19 are opened. The softened water is transferred to the adsorption tank by the fourth water pump 17 for flushing, and after 10 minutes, the flushing is stopped, and the recovery valve 25 is closed and the water outlet valve 22 is opened.
The quality of the sewage and the indexes of the sewage treated by the process refer to tables 1 and 2 respectively.
TABLE 1 quality of influent water
| Serial number | Item | Unit of | Quality of water |
| 1 | Petroleum products | mg/L | ≤8 |
| 2 | pH value | ≤7.5 | |
| 3 | Suspended matter | mg/L | ≤10 |
| 4 | Ammonia nitrogen | mg/L | ≤100 |
TABLE 2 quality of effluent
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a high concentration ammonia nitrogen sewage adsorbs denitrogenation preliminary treatment assembly line, characterized by includes filter equipment, adsorption equipment, regenerating unit and goes out the liquid device, filter equipment includes security filter (1) and collects storage water tank (3) of discharge water behind security filter (1), adsorption equipment includes two at least internally mounted has the adsorption tanks of zeolite, regenerating unit is including regeneration fluid reservoir (14) of storing regeneration alkali lye and washing fluid reservoir (15) of storing demineralized water, storage water tank (3), regeneration fluid reservoir (14) and washing fluid reservoir (15) all are linked together with the adsorption tanks, it includes outlet pipe (20) of connection on the adsorption tanks to go out the liquid device.
2. The high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment assembly line of claim 1, wherein the filtering device further comprises a second water pump (4) for conveying water in the water storage tank (3) outwards, a first water conveying valve (5) for controlling the opening and closing of a pipeline is installed on the pipeline between the second water pump (4) and the water storage tank (3), the three adsorption tanks are respectively a first adsorption tank (6), a second adsorption tank (7) and a standby adsorption tank (8), and a water outlet of the second water pump (4) is communicated with the first adsorption tank (6), the second adsorption tank (7) and the standby adsorption tank (8) through a first pipeline assembly.
3. The high-concentration ammonia nitrogen sewage adsorption and denitrification pretreatment production line of claim 2, wherein the first pipeline assembly comprises a first water inlet pipe (9) connected with the first adsorption tank (6), a second water inlet pipe (10) connected with the second adsorption tank (7) and a standby water inlet pipe (11) connected with the standby adsorption tank (8), the first water inlet pipe (9) and the second water inlet pipe (10) are connected through a first electric three-way reversing valve (12), and two switching ends of the first electric three-way reversing valve (12) are respectively communicated with the first water inlet pipe (9) and the second water inlet pipe (10); the fixed end of the first electric three-way reversing valve (12) is connected with a second electric three-way reversing valve (13), two switching ends of the second electric three-way reversing valve (13) are respectively communicated with the first electric three-way reversing valve (12) and the standby water inlet pipe (11), and the fixed end of the second electric three-way reversing valve (13) is communicated with a water outlet of the second water pump (4).
4. The high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment production line of claim 2, wherein a third water pump (16) for conveying regenerated alkali liquor outwards is installed on the side surface of the regenerated liquid tank (14), a fourth water pump (17) for conveying softened water outwards is installed on the side surface of the cleaning liquid tank (15), a second water conveying valve (18) is installed on a pipeline between the third water pump (16) and the regenerated liquid tank (14), and a third water conveying valve (19) is installed on a pipeline between the fourth water pump (17) and the cleaning liquid tank (15); the water outlets of the third water pump (16) and the fourth water pump (17) are communicated with a regeneration pipeline, and the regeneration pipeline is communicated with the first adsorption tank (6), the second adsorption tank (7) and the standby adsorption tank (8) through a second pipeline component.
5. The high-concentration ammonia nitrogen sewage adsorption and denitrification pretreatment production line of claim 4, wherein the liquid outlet device comprises three water outlet pipes (20) which are respectively connected to the side walls of the first adsorption tank (6), the second adsorption tank (7) and the standby adsorption tank (8) and are close to the upper end positions, and an ammonia nitrogen analyzer (21) and a water outlet valve (22) are mounted on each water outlet pipe (20).
6. The high-concentration ammonia nitrogen sewage adsorption and denitrification pretreatment production line according to claim 5, wherein a recovery pipe (23) is communicated with a position, between the water outlet valve (22) and the adsorption tank, on the water outlet pipe (20), the other ends of the three recovery pipes (23) are communicated with the same alkali liquor recovery tank (24), and a recovery valve (25) is installed on each recovery pipe (23).
7. A high-concentration ammonia nitrogen sewage adsorption denitrification pretreatment process is characterized by comprising the following steps:
s1, filtering;
s2, adsorbing ammonia nitrogen;
conveying the sewage into a first adsorption tank (6)/a second adsorption tank (7), adsorbing ammonia nitrogen by the sewage through the first adsorption tank (6)/the second adsorption tank (7), and discharging the sewage through a water outlet pipe (20);
s3, switching adsorption tanks;
s4, adsorption regeneration;
and S5, flushing.
8. The pretreatment process of adsorption denitrification for high concentration ammonia nitrogen wastewater according to claim 7, wherein in S3, when the ammonia nitrogen analyzer (21) on the water outlet pipe (20) detects that the ammonia nitrogen concentration in the outputted wastewater is higher than a set value, a signal is sent to switch the first electric three-way reversing valve (12) of the first pipeline assembly; if the ammonia nitrogen analyzer (21) detects that the signal sending time is far away from the last signal sending time for regeneration and flushing, the second electric three-way reversing valve (13) is switched and an alarm is sent.
9. The pretreatment process for adsorptive denitrification of high concentration ammonia nitrogen wastewater according to claim 7, wherein in S4, after switching adsorption tanks, the corresponding outlet valve (22) of the adsorption tank is closed and the recovery valve (25) is opened; the second pipeline assembly is switched to be communicated with the adsorption tank communicated with the first pipeline assembly before switching, the second water delivery valve (18) is opened, and the third water pump (16) is started and continuously delivers the regenerated alkali liquor within a set time.
10. The adsorption denitrification pretreatment process for high-concentration ammonia nitrogen sewage according to claim 9, wherein in S5, after the third water pump (16) continuously operates for a set time, the third water pump (16) and the second water delivery valve (18) are closed, the third water delivery valve (19) is opened, and the fourth water pump (17) is started; and the fourth water pump (17) stops after running for a set time, and closes the recovery valve (25) and opens the water outlet valve (22).
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2020
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| US20080023401A1 (en) * | 2004-11-05 | 2008-01-31 | Hitachi, Ltd. | Method for Removing Organic Material in Oilfield Produced Water and a Removal Device Therefor |
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