CN111320338A - High-denitrification device and method without limitation of reflux ratio - Google Patents
High-denitrification device and method without limitation of reflux ratio Download PDFInfo
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- CN111320338A CN111320338A CN202010303145.4A CN202010303145A CN111320338A CN 111320338 A CN111320338 A CN 111320338A CN 202010303145 A CN202010303145 A CN 202010303145A CN 111320338 A CN111320338 A CN 111320338A
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- denitrification
- resin
- basket
- lifting
- tank
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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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
- C02F2303/14—Maintenance of water treatment installations
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
Abstract
The invention discloses a high denitrification device and method without the limitation of a reflux ratio, and belongs to the technical field of wastewater treatment. A denitrification device with high denitrification efficiency and without the limitation of reflux ratio comprises a water distribution pipe, an aeration pipe, a lifting cover, a lifting basket seat, a lifting basket and a water collecting tank which are arranged in a denitrification pool; the lifting cover is arranged in the middle of the denitrification tank, the water distribution pipe and the aeration pipe are arranged at the bottom of the denitrification tank on the lower portion of the lifting cover to form an aeration device, the basket holder is a sleeve, the inner-layer bobbin is communicated with the top of the lifting cover, the inner-layer bobbin is lower than the outer-layer bobbin, the basket is fixed on the basket holder, the water collecting tank is arranged at the top of the denitrification tank along the inner wall of the denitrification tank, and the denitrification tank is filled with adsorption resin. The invention solves the problem that the reflux ratio limits the denitrification efficiency in wastewater treatment, and has stable system operation and good water outlet effect.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a high denitrification device and method without the limitation of a reflux ratio.
Background
The existing biochemical denitrification technology generally adopts UASB and aerobic biochemical oxidation nitrification, the nitrification liquid is pumped to flow back to the UASB for denitrification, the required equipment is more, the occupied area is wide, wherein the biochemical denitrification technologyThe nitrifying liquid is required to flow back to the anoxic denitrification process section, the proportion of the nitrate and nitrogen amount which can be brought back to the anoxic denitrification section by the nitrifying liquid backflow to the total nitrifying nitrogen amount determines the denitrification efficiency, and the denitrification efficiency is calculated by the following formula:
wherein η is the denitrification efficiency, n is the total nitrification liquid reflux ratio, namely the reflux ratio must be increased when the denitrification efficiency is increased, and the prior operation process has limited control of the denitrification ratio of the nitrification liquid of the ammonia-containing wastewater, so that the problems of low denitrification efficiency and difficulty in reaching the total nitrogen standard exist.
In order to solve the defects of the existing biochemical denitrification technology, the invention provides a high denitrification technology which is not limited by a reflux ratio.
Disclosure of Invention
The invention aims to provide a denitrification device with high denitrification efficiency without the limitation of a reflux ratio.
It is another object of the present invention to provide a denitrification process with high denitrification efficiency without being limited by a reflux ratio.
The invention is realized by the following technical scheme:
a denitrification device with high denitrification efficiency and without the limitation of reflux ratio comprises a water distribution pipe, an aeration pipe, a lifting cover, a lifting basket seat, a lifting basket and a water collecting tank which are arranged in a denitrification pool; the lifting cover is arranged in the middle of the denitrification tank, the water distribution pipe and the aeration pipe are arranged at the bottom of the denitrification tank on the lower portion of the lifting cover to form an aeration device, the basket holder is a sleeve, the inner-layer bobbin is communicated with the top of the lifting cover, the inner-layer bobbin is lower than the outer-layer bobbin, the basket is fixed on the basket holder, the water collecting tank is arranged at the top of the denitrification tank along the inner wall of the denitrification tank, and the denitrification tank is filled with adsorption resin.
The lifting basket is a stainless steel screen.
The lifting basket is a 100-mesh stainless steel screen.
The resin is nitrate selective adsorption resin.
The invention also provides a denitrification method by utilizing the device, which comprises the following steps
1) Inputting wastewater to be treated into a denitrification tank through a water distribution pipe, wherein an aeration pipe is communicated with a blast device, rising bubbles emitted by the aeration pipe drive the wastewater to form rising water flow in a lifting cover to form an aerobic zone, and resin filled in the device is used for adsorbing nitrate nitrogen generated in the aerobic zone;
2) the wastewater and the resin adsorbed with nitrate nitrogen flow back into the denitrification tanks at two sides of the upper part of the lifting cover, the wastewater is gradually separated from biochemical sludge and resin, and part of the wastewater is collected and discharged through a top water collecting tank;
3) the rest wastewater mixed with the biochemical sludge and the resin continuously descends, enters a denitrification section for denitrification under the anoxic condition at the two sides of the lifting cover, the resin adsorbed with nitrate nitrogen is regenerated at the denitrification section, the biochemical sludge is settled to the bottom of the denitrification tank, and flows back to the lifting cover along with the wastewater mixed with the regenerated resin from a crack between the lifting cover and the bottom of the denitrification tank for cyclic treatment;
4) when the resin is polluted, the basket is arranged on the basket seat, the waste water is filtered by the basket, the resin is filtered out, the polluted resin filtered out from the basket is extracted, and the clean resin is put in again.
The invention is at the end of aerobic zone, part of waste water containing nitrate resin flows back to anoxic denitrification section, and nitrate nitrogen adsorbed by denitrifying ion exchange resin is regenerated by utilizing anoxic denitrification action, the specific operation principle diagram is shown in figure 2, when in operation, waste water enters equipment from water inlet pipe, under the stirring of compressed air distributed by aeration pipe, mixed liquid of waste water, biochemical sludge and resin is formed in area 1 at the lower part of lifting cover, the mixed liquid flows to the top of area 1, basket seat is made at the top of area 1, when resin is not polluted, basket is not installed, the mixed liquid of waste water, biochemical sludge and resin passes through basket seat to enter area 2 at two sides of the upper part of lifting cover, in area 2, because of no air stirring, and the cross section area of circulation is larger, the flow rate of mixed liquid is rapidly reduced, hydraulic power carrying force is reduced, waste water and biochemical sludge are gradually, Resin separation, wherein partial waste water is collected and discharged through a top water collecting tank, ammonia nitrogen is nitrified in the region 1 to generate nitrate nitrogen, and the nitrate nitrogen generated by nitrification is adsorbed by resin, so that the nitrogen content in the waste water is extremely low, the discharged waste water is subjected to high-efficiency denitrification, the resin and biochemical sludge separated in the region 2 are settled in regions 3 on two sides of the lower part of the lifting cover, anoxic denitrification is completed in the regions 3, the resin is regenerated, and the regenerated resin flows back to the region 1 at the bottom of the regions 3 to perform adsorption and regeneration circulation again; when the resin is polluted, the basket is arranged on the basket seat, the wastewater is filtered by the basket, the resin is filtered out, the polluted resin filtered out in the basket is extracted for cleaning and recovery, and the clean resin is added after the polluted resin is extracted, so that the normal operation of equipment is ensured
In conclusion, the invention utilizes nitrate to selectively adsorb ion exchange resin, the nitrate nitrogen generated by nitrification is adsorbed in the aerobic nitrification area, the ion exchange resin and part of the wastewater used for carrying the ion exchange resin flow back to the denitrification area of the anoxic pond, and the wastewater is denitrified under the denitrification action, thereby completing the regeneration of the ion exchange resin and flows to the aerobic nitrification area for recycling.
The invention solves the problem that the reflux ratio limits the denitrification efficiency in wastewater treatment, and has stable system operation and good water outlet effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the operation of the present invention.
In the figure: 1-an aeration pipe, 2-a water distribution pipe, 3-a basket seat, 4-a basket, 5-a water collecting tank and 6-a lifting cover.
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.
As shown in figure 1, the denitrification device with high denitrification efficiency and without the limitation of reflux ratio comprises a water distribution pipe 2, an aeration pipe 1, a lifting cover 6, a basket base 3, a basket 4 and a water collecting tank 5 which are arranged in a denitrification pool; promote the cover 6 setting in the intermediate position of denitrogenation pond, water distributor 2 and aeration pipe 1 set up and form aeration equipment in the denitrogenation bottom of the pond of promoting the cover 6 lower part, basket seat 3 be the sleeve, the top intercommunication of inlayer bobbin and promotion cover 6, wherein the inlayer bobbin is less than outer bobbin, basket 4 be 100 mesh stainless steel screen cloth, fix on promoting seat 3, water catch bowl 5 set up the top in denitrogenation pond along the inner wall in denitrogenation pond, the denitrogenation pond intussuseption be filled with adsorption resin.
The operation principle is shown in fig. 2, and the steps are as follows:
1) inputting wastewater to be treated into a denitrification tank through a water distribution pipe, wherein an aeration pipe is communicated with a blast device, rising bubbles emitted by the aeration pipe drive the wastewater to form rising water flow in a lifting cover to form an aerobic zone, and resin filled in the device is used for adsorbing nitrate nitrogen generated in the aerobic zone;
2) the wastewater and the resin adsorbed with nitrate nitrogen flow back into the denitrification tanks at two sides of the upper part of the lifting cover, the wastewater is gradually separated from biochemical sludge and resin, and part of the wastewater is collected and discharged through a top water collecting tank;
3) the rest wastewater mixed with the biochemical sludge and the resin continuously descends, enters a denitrification section for denitrification under the anoxic condition at the two sides of the lifting cover, the resin adsorbed with nitrate nitrogen is regenerated at the denitrification section, the biochemical sludge is settled to the bottom of the denitrification tank, and flows back to the lifting cover along with the wastewater mixed with the regenerated resin from a crack between the lifting cover and the bottom of the denitrification tank for cyclic treatment;
4) when the resin is polluted, the basket is arranged on the basket seat, the waste water is filtered by the basket, the resin is filtered out, the polluted resin filtered out from the basket is extracted, and the clean resin is put in again.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A denitrification device with high denitrification efficiency and without the limitation of reflux ratio is characterized by comprising a water distribution pipe, an aeration pipe, a lifting cover, a lifting basket seat, a lifting basket and a water collecting tank which are arranged in a denitrification pool; the lifting cover is arranged in the middle of the denitrification tank, the water distribution pipe and the aeration pipe are arranged at the bottom of the denitrification tank on the lower portion of the lifting cover to form an aeration device, the lifting seat is a sleeve, the inner-layer bobbin is communicated with the top of the lifting cover, the inner-layer bobbin is lower than the outer-layer bobbin, the lifting basket is fixed on the lifting seat, the water collecting tank is arranged at the top of the denitrification tank along the inner wall of the denitrification tank, and the denitrification tank is filled with adsorption resin.
2. The denitrification apparatus with high denitrification efficiency without the limitation of reflux ratio as claimed in claim 1, wherein the basket is a stainless steel mesh.
3. The denitrification apparatus with high denitrification efficiency without being limited by the reflux ratio as claimed in claim 1 or 2, wherein the basket is a 100 mesh stainless steel mesh.
4. The denitrification apparatus with high denitrification efficiency without limitation of reflux ratio as claimed in claim 1 or 2, wherein the adsorption resin means is an ion adsorption resin.
5. The denitrification apparatus with high denitrification efficiency without limitation of reflux ratio as set forth in claim 4, wherein said adsorbent resin is a nitrate selective adsorbent resin.
6. The denitrification method using the apparatus of any one of claims 1 to 5, comprising the steps of:
1) inputting wastewater to be treated into a denitrification tank through a water distribution pipe, wherein an aeration pipe is communicated with a blast device, rising bubbles emitted by the aeration pipe drive the wastewater to form rising water flow in a lifting cover to form an aerobic zone, and resin filled in the device is used for adsorbing nitrate nitrogen generated in the aerobic zone;
2) the wastewater and the resin adsorbed with nitrate nitrogen flow back into the denitrification tanks at two sides of the upper part of the lifting cover, the wastewater is gradually separated from biochemical sludge and resin, and part of the wastewater is collected and discharged through a top water collecting tank;
3) the rest wastewater mixed with the biochemical sludge and the resin continuously descends, enters a denitrification section for denitrification under the anoxic condition at the two sides of the lifting cover, the resin adsorbed with nitrate nitrogen is regenerated at the denitrification section, the biochemical sludge is settled to the bottom of the denitrification tank, and flows back to the lifting cover along with the wastewater mixed with the regenerated resin from a crack between the lifting cover and the bottom of the denitrification tank for cyclic treatment;
4) when the resin is polluted, the basket is arranged on the basket seat, the waste water is filtered by the basket, the resin is filtered out, the polluted resin filtered out from the basket is extracted, and the clean resin is put in again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303145.4A CN111320338A (en) | 2020-04-17 | 2020-04-17 | High-denitrification device and method without limitation of reflux ratio |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010303145.4A CN111320338A (en) | 2020-04-17 | 2020-04-17 | High-denitrification device and method without limitation of reflux ratio |
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| CN111320338A true CN111320338A (en) | 2020-06-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11169848A (en) * | 1997-12-10 | 1999-06-29 | Shinko Pantec Co Ltd | Nitric acid containing waste water treating device and treating method |
| CN201136823Y (en) * | 2007-12-18 | 2008-10-22 | 华南理工大学 | Aerobic-anaerobic circulating treatment device for waste water |
| CN102219284A (en) * | 2011-05-16 | 2011-10-19 | 南京大学 | Mechanical stirring internal circulation resin ion exchange and adsorption reactor |
| CN105036495A (en) * | 2015-09-09 | 2015-11-11 | 南京大学 | Method for removing nitrate nitrogen in water through ion exchange and denitrification integration |
| CN107651815A (en) * | 2017-11-17 | 2018-02-02 | 南京大学 | A kind of magnetic resin promotes the method that denitrification removes nitrate nitrogen in water removal |
| CN212640208U (en) * | 2020-04-17 | 2021-03-02 | 山西润潞碧水环保科技股份有限公司 | High denitrification device free from reflux ratio limitation |
-
2020
- 2020-04-17 CN CN202010303145.4A patent/CN111320338A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11169848A (en) * | 1997-12-10 | 1999-06-29 | Shinko Pantec Co Ltd | Nitric acid containing waste water treating device and treating method |
| CN201136823Y (en) * | 2007-12-18 | 2008-10-22 | 华南理工大学 | Aerobic-anaerobic circulating treatment device for waste water |
| CN102219284A (en) * | 2011-05-16 | 2011-10-19 | 南京大学 | Mechanical stirring internal circulation resin ion exchange and adsorption reactor |
| CN105036495A (en) * | 2015-09-09 | 2015-11-11 | 南京大学 | Method for removing nitrate nitrogen in water through ion exchange and denitrification integration |
| CN107651815A (en) * | 2017-11-17 | 2018-02-02 | 南京大学 | A kind of magnetic resin promotes the method that denitrification removes nitrate nitrogen in water removal |
| CN212640208U (en) * | 2020-04-17 | 2021-03-02 | 山西润潞碧水环保科技股份有限公司 | High denitrification device free from reflux ratio limitation |
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