CN217077289U - Anaerobic system capable of tolerating high-concentration ammonia nitrogen - Google Patents
Anaerobic system capable of tolerating high-concentration ammonia nitrogen Download PDFInfo
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Abstract
The utility model discloses an anaerobic system capable of tolerating high-concentration ammonia nitrogen, which comprises an anaerobic reactor, wherein the anaerobic reactor is used for anaerobic treatment of high-ammonia nitrogen wastewater to digest organic solid waste anaerobic substances, and anaerobic digestion liquid with high ammonia nitrogen in the anaerobic reactor utilizes water level difference and flows into an ammonia nitrogen stripping tower of an ammonia nitrogen stripping subsystem through a water distribution device; the ammonia nitrogen stripping tower is used for carrying out ammonia nitrogen stripping on the anaerobic digestion liquid entering the ammonia nitrogen stripping tower, a multi-stage deamination filler area is arranged, and ammonia gas generated by the ammonia nitrogen stripping tower is sprayed by sulfuric acid to be absorbed through an ammonium sulfate absorption tower of an ammonium sulfate absorption subsystem so as to be absorbed into the ammonia gas; and the ammonium sulfate absorption tower is used for absorbing the ammonia gas generated by the ammonia nitrogen stripping tower by sulfuric acid, and comprises a sulfuric acid absorption filler zone, an ammonium sulfate buffer zone and a demister. The utility model discloses an effectively get rid of the ammonia nitrogen of anaerobic digestion liquid, improve anaerobic reactor treatment effeciency, reduce follow-up denitrogenation processing system's construction investment and working costs, absorbed the ammonia nitrogen in the waste water simultaneously, realized certain economic value.
Description
Technical Field
The utility model relates to a water, organic solid useless processing technology field particularly, relates to an anaerobic system that can tolerate high concentration ammonia nitrogen.
Background
Ammonia nitrogen is combined nitrogen in the form of ammonia or ammonium ions, i.e. free ammonia (NH) in water 3 ) And nitrogen in the form of ammonium ions (NH 4 +). The dissociation concentration of Free Ammonia (FA) depends on Ammonia nitrogen concentration, temperature, pH. Along with the accumulation of ammonia nitrogen in the anaerobic digestion process, the concentration of dissociated free ammonia can be greatly improved, and the free ammonia can enter cell membranes to destroy the metabolic balance in cells and generate an inhibiting effect on anaerobic methanogens, so that the anaerobic treatment efficiency and the methanogenesis rate are influenced.
The existing high-concentration wastewater treatment field mainly adopts an anaerobic treatment technology to degrade organic matters, but the traditional anaerobic treatment technology cannot degrade ammonia nitrogen, and only can convert part of ammonia nitrogen into organic nitrogen by utilizing the assimilation of microorganisms, so that the organic nitrogen is utilized by the microorganisms. Particularly in the field of anaerobic digestion treatment of organic solid wastes such as kitchen waste, excrement, sludge and the like, the organic solid wastes contain a large amount of organic nitrogen compounds, and the organic nitrogen can be quickly converted into ammonia nitrogen under the ammoniation action of anaerobic microorganisms, so that the concentration of the ammonia nitrogen in the wastewater is greatly improved.
SUMMERY OF THE UTILITY MODEL
To the above technical problem in the correlation technique, the utility model provides a can tolerate high concentration ammonia nitrogen's anaerobic system can overcome the above-mentioned not enough of prior art method.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
an anaerobic system capable of tolerating high-concentration ammonia nitrogen comprises an anaerobic reaction subsystem, an ammonia nitrogen stripping subsystem and an ammonium sulfate absorption subsystem, wherein,
the anaerobic reaction subsystem mainly comprises an anaerobic reactor, is used for anaerobic treatment of high ammonia nitrogen wastewater and digesting organic solid waste anaerobic substances, wherein high ammonia nitrogen anaerobic digestion liquid in the anaerobic reactor flows into an ammonia nitrogen stripping tower of the ammonia nitrogen stripping subsystem by utilizing water level difference and through a water distribution and distribution device, and the anaerobic reactor is provided with a feed inlet, a discharge outlet, a methane outlet, a circulating feed water distribution device, a digestion liquid denitrification circulating outlet and a digestion liquid denitrification circulating inlet;
the ammonia nitrogen stripping subsystem mainly comprises the ammonia nitrogen stripping tower, is used for carrying out ammonia nitrogen stripping on the anaerobic digestive juice entering the ammonia nitrogen stripping tower, and is provided with a multi-stage deamination filler area, ammonia gas generated by the ammonia nitrogen stripping tower is sprayed by sulfuric acid to be absorbed through an ammonium sulfate absorption tower of an ammonium sulfate absorption subsystem, so that the ammonia gas is absorbed, and the ammonia nitrogen stripping tower comprises a water distribution device, an deamination filler area, a gas distribution area, a digestive juice buffer area and a demisting area;
the ammonium sulfate absorption subsystem mainly comprises an ammonium sulfate absorption tower, wherein the ammonium sulfate absorption tower is used for absorbing the ammonia gas generated by the ammonia nitrogen stripping tower by sulfuric acid, and comprises a sulfuric acid absorption packing area, an ammonium sulfate buffer area and a demister.
Furthermore, the water distribution and distribution device adopts an anti-blocking large-hole structure and comprises a plurality of water distribution pipe holes with upward openings, and the upper parts of the water distribution pipe holes are provided with an inverted umbrella structure; the bottom of the gas distribution area is connected with a blower, a distribution is arranged, a liquid accumulation area of 50-100mm is arranged on the gas distribution grid plate, and an overflow weir plate is arranged on the side surface of the gas distribution grid plate.
Further, the digestive juice buffer area is connected with a digestive juice circulating pump; the deaminizing filler zone is provided with a plurality of stages and more than two stages in the tower, pall rings, Raschig rings and polyhedral hollow ball fillers with large surface areas are adopted, the filler bearing plate adopts a porous grid plate, and the height of each stage of filler zone is less than or equal to 1.0 m.
Further, the anaerobic reactor, the ammonia nitrogen stripping tower and the ammonium sulfate absorption tower are all sealed structures, methane generated by the anaerobic reactor is pressurized and conveyed to a methane utilization facility, a stripping blower blows air and conveys the air into the ammonia nitrogen stripping tower, ammonia gas is absorbed by the ammonium sulfate absorption tower and then conveyed to an incineration device under positive pressure or discharged at high altitude, wherein a stripping gas source of the stripping blower adopts methane or air.
Furthermore, the demisting area comprises a screen removing plate, a silk screen demister and a folded plate demister, the top of the screen removing plate is communicated with the air outlet pipe, the silk screen demister is located at the bottom of the folded plate demister, the lower layer of the silk screen demister is provided with 8mm screen grids, the aperture of the silk screen demister is not less than 50 meshes, and the porosity of the folded plate demister is not less than 95%.
Furthermore, in the ammonium sulfate absorption subsystem, the sulfuric acid absorption filler is divided into an upper layer and a lower layer, the upper layer adopts sulfuric acid spraying to absorb ammonia gas and is connected with a sulfuric acid storage tank and a sulfuric acid adding pump, and the lower layer adopts a circulating liquid in the tower to absorb ammonia gas; the ammonium sulfate buffer zone is provided with a liquid level meter and a pH meter which are connected with an ammonium sulfate circulating pump and a sulfuric acid adding pump.
The utility model has the advantages that: by effectively removing ammonia nitrogen in anaerobic digestion liquid, the treatment efficiency of the anaerobic reactor is improved, the construction investment and the operating cost of a subsequent denitrification treatment system can be reduced, the ammonia nitrogen in the wastewater is recovered, and a certain economic value is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of the overall system structure of an anaerobic system capable of tolerating high-concentration ammonia nitrogen according to an embodiment of the present invention.
Figure 2 is a schematic structural diagram of an ammonia nitrogen stripping tower of an anaerobic system capable of tolerating high-concentration ammonia nitrogen according to the embodiment of the utility model.
Fig. 3 is a schematic structural diagram of an ammonium sulfate absorption tower of an anaerobic system capable of tolerating high-concentration ammonia nitrogen according to an embodiment of the present invention.
In the figure: 1: an anaerobic reactor; 2: an ammonia nitrogen stripping tower; 3: an ammonium sulfate absorption tower; 4: a digestive juice circulating pump; 5: a stripping blower; 6: an ammonium sulfate circulating pump; 7: adding a pump for sulfuric acid; 8: a sulfuric acid storage tank; 9: a circulating feeding water distribution device; 10: a feed inlet; 11: a discharge port; 12: a biogas outlet; 13: a digestive juice denitrification circulating outlet; 14: a digestive juice denitrification circulation inlet; 15: a digestive juice discharging pipe; 101: a circulating discharge regulating valve; 102: a water inlet valve of the upper-layer deammoniation filler zone; 103: a lower deamination filling area water inlet valve; 104: a circulating feed valve; 105: a biogas discharge valve; 106: a biogas inlet valve; 107: an air intake valve; 108: a methane reflux valve; 109: an air discharge valve; 110: ammonium sulfate reflux valve; 111: an ammonium sulfate discharge valve; 201: a tower body of an ammonia nitrogen stripping tower; 202: a demisting area; 203: a deamination packing area; 204: a gas distribution region; 205: a digestive juice buffer zone; 206: a folded plate demister; 207: defoaming silk screen; 208: a screen grid; 209: distributing water devices; 210: a filler bearing plate; 211: a gas distribution grid plate; 212: a feed inlet; 213: an upper layer circulating feed inlet; 214: a lower layer of circulating feed inlet; 215: a discharge port; 216: an air inlet; 217: an air outlet; 301: a tower body of an ammonium sulfate absorption tower; 302: a demisting area; 303: an upper sulphuric acid absorbing filler zone; 304: a lower sulfuric acid absorption filler zone; 305: an ammonium sulfate buffer area; 306: a demister; 307: an upper water distributor; 308: a lower water distributor; 309: an upper layer filler bearing plate; 310: a lower layer filler bearing plate; 311: an air inlet; 312: an air outlet; 313: a sulfuric acid feed port; 314: a circulating feed inlet; 315: and (4) a discharge port.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary skilled in the art all belong to the protection scope of the present invention, and in order to facilitate understanding of the above technical solution of the present invention, the above technical solution of the present invention is described in detail below through a specific use mode.
As shown in figures 1-3, the anaerobic system capable of tolerating high-concentration ammonia nitrogen according to the embodiment of the present invention comprises an anaerobic reaction subsystem, an ammonia nitrogen stripping subsystem and an ammonium sulfate absorption subsystem.
The anaerobic reaction subsystem mainly comprises an anaerobic reactor 1, which is used for anaerobic treatment of high ammonia nitrogen wastewater and digestion of organic solid waste anaerobic substances, wherein high ammonia nitrogen anaerobic digestion liquid in the anaerobic reactor 1 flows into an ammonia nitrogen stripping tower 2 of the ammonia nitrogen stripping subsystem through a water distribution device 209 by utilizing water level difference, and the anaerobic reactor 1 is provided with a feed inlet 10, a discharge outlet 11, a methane outlet 12, a circular feed water distribution device 9, a digestion liquid denitrification circulating outlet 13 and a digestion liquid denitrification circulating inlet 14; the device comprises a digestion liquid circulation discharge port, a digestion liquid circulation feeding pipe, a circulation feeding and water distribution device, a pipeline, an automatic adjusting valve and a perforated pipe, wherein the digestion liquid circulation discharge port is positioned in the middle of a reactor, the digestion liquid automatically flows into an ammonia nitrogen stripping tower by utilizing the height difference of a water level, the digestion liquid circulation feeding pipe is arranged at the bottom of the reactor, the circulation feeding and water distribution device is arranged in the reactor, the pipeline is provided with a gradient which is more than or equal to 5 thousandths of a, the automatic adjusting valve is arranged on the pipeline, the opening of the valve can be adjusted according to the treatment requirement to control the circulation flow of the digestion liquid, in addition, the perforated pipe water distribution mode is adopted, the distribution and water distribution uniformity of the anaerobic digestion liquid circulation in the anaerobic reactor 1 is ensured, the short-flow phenomenon is prevented, and the orifice flow rate is more than or equal to 3 m/s.
The ammonia nitrogen stripping subsystem mainly comprises an ammonia nitrogen stripping tower 2, which is used for carrying out ammonia nitrogen stripping on anaerobic digestion liquid entering the ammonia nitrogen stripping tower, a multistage deamination filler area 203 is arranged, the ammonia nitrogen concentration in the reactor can be greatly reduced after the anaerobic digestion liquid is subjected to multiple circulating treatment, the ammonia gas generated by the ammonia nitrogen stripping tower 2 is sprayed and absorbed by sulfuric acid through an ammonium sulfate absorption tower 3 of an ammonium sulfate absorption subsystem, so that the ammonia gas is absorbed, and the ammonia nitrogen stripping tower 2 comprises a water distribution device 209, a deamination filler area 203, a gas distribution area 204, a digestion liquid buffer area 205 and a demisting area 202. The ammonia nitrogen stripping tower 2 adopts a methane circulation stripping operation mode, an air suction port of an air blower 5 is connected with a methane pipeline, a methane air inlet valve 106 is opened during operation, and stripped methane is connected to an ammonium sulfate absorption tower 3 through an air outlet pipe at the top of the ammonia nitrogen stripping tower 2; in addition, the ammonia nitrogen stripping tower 2 also adopts an air stripping operation mode, an air suction inlet of the air blower 5 is directly communicated with the atmosphere, an air outlet pipe at the top of the ammonia nitrogen stripping tower 2 for stripping waste gas is connected to the ammonium sulfate absorption tower 3, and the waste gas after ammonia gas recovery can meet the relevant standard requirements of atmospheric pollutant emission and can be directly discharged at high altitude.
The ammonium sulfate absorption subsystem mainly comprises an ammonium sulfate absorption tower 3 for absorbing the ammonia gas generated by the ammonia nitrogen stripping tower 2 with sulfuric acid, and the ammonium sulfate absorption tower 3 comprises a sulfuric acid absorption packing area, an ammonium sulfate buffer area 305 and a demister 306.
The water distribution and distribution device 209 is of an anti-blocking macroporous structure and comprises a plurality of water distribution pipe holes with upward openings, and the upper parts of the water distribution pipe holes are provided with inverted umbrella structures; the bottom of the gas distribution area is connected with a blower, the gas distribution grid plate 211 is arranged, the gas distribution grid plate 211 is provided with a 50-100mm liquid accumulation area, and the side surface of the gas distribution grid plate is provided with an overflow weir plate.
The digestive juice buffer zone 205 is connected with the digestive juice circulating pump 4, reduces the ammonia nitrogen concentration of the anaerobic digestive juice by a circulating treatment mode, reduces the inhibiting effect of the free ammonia concentration on microorganisms, improves the operation effect of the anaerobic reactor 1, and can also reduce the cost of a subsequent denitrification treatment system. The deammoniation packing area 203 is provided with more than two stages in the tower, and adopts pall rings, Raschig rings and polyhedral hollow ball packing with larger surface area, and the packing supporting plate 210 adopts a porous grid plate, wherein the height of each stage of packing area is less than or equal to 1.0 m.
The anaerobic reactor 1, the ammonia nitrogen stripping tower 2 and the ammonium sulfate absorption tower 3 are all sealed structures, methane generated by the anaerobic reactor 1 is pressurized and conveyed to a methane utilization facility, a stripping blower 5 blows air and conveys the air into the ammonia nitrogen stripping tower 2, the ammonia gas is absorbed by the ammonium sulfate absorption tower 3 and then is positively pressurized and conveyed to an incineration device or discharged at high altitude, wherein a stripping gas source of the stripping blower 5 adopts methane or air.
The demisting zone 202 comprises a demisting plate 208, a silk screen demister 207 and a folded plate demister 206, the top of the demisting zone is communicated with an air outlet pipe, the silk screen demister 207 is positioned at the bottom of the folded plate demister 206, the lower layer of the silk screen demister 207 is provided with a 8mm silk screen grid 208, the aperture of the silk screen demister 207 is not less than 50 meshes, and the porosity of the folded plate demister 206 is not less than 95%.
In the ammonium sulfate absorption subsystem, a sulfuric acid absorption filler area is divided into an upper layer and a lower layer, the upper layer adopts sulfuric acid spraying to absorb ammonia gas and is connected with a sulfuric acid storage tank 8 and a sulfuric acid feeding pump 7, and the lower layer adopts tower internal circulation liquid to absorb ammonia gas; the ammonium sulfate buffer area 305 is provided with a liquid level meter and a pH meter which are connected with an ammonium sulfate circulating pump 6 and a sulfuric acid adding pump 7.
To sum up, with the aid of the above technical scheme of the utility model, through anaerobic digestion liquid in the digestion liquid circulating pump constantly circulates anaerobic reactor to ammonia nitrogen and blows off the tower, carry out ammonia nitrogen and blow off and handle and absorb to reduce free ammonia concentration in the anaerobic reactor by a wide margin, reduce the inhibitory action of free ammonia to the microorganism, can effectively improve anaerobic reaction efficiency, reduce the ammonia nitrogen concentration in the anaerobic discharge liquid simultaneously, reduce follow-up denitrogenation processing system's construction investment and working costs. The ammonia gas generated after the ammonia nitrogen is blown off is absorbed by an ammonium sulfate absorption tower and then is recovered, so that the aims of energy conservation and emission reduction and wastewater recycling treatment are fulfilled.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An anaerobic system capable of tolerating high-concentration ammonia nitrogen is characterized by comprising an anaerobic reaction subsystem, an ammonia nitrogen stripping subsystem and an ammonium sulfate absorption subsystem, wherein the anaerobic reaction subsystem mainly comprises an anaerobic reactor (1) for anaerobic treatment of high ammonia nitrogen wastewater and digestion of organic solid waste anaerobic substances, high ammonia nitrogen anaerobic digestion liquid in the anaerobic reactor (1) flows into an ammonia nitrogen stripping tower (2) of the ammonia nitrogen stripping subsystem through a water distribution device (209) by utilizing water level difference, and the anaerobic reactor (1) is provided with a feeding hole (10), a discharging hole (11), a methane outlet (12), a circular feeding water distribution device (9), a digestion liquid denitrification circular outlet (13) and a digestion liquid denitrification circular inlet (14);
the ammonia nitrogen stripping subsystem mainly comprises an ammonia nitrogen stripping tower (2) for carrying out ammonia nitrogen stripping on the anaerobic digestive juice entering the ammonia nitrogen stripping tower, a multistage deamination filler area (203) is arranged, ammonia gas generated by the ammonia nitrogen stripping tower (2) is sprayed and absorbed by sulfuric acid through an ammonium sulfate absorption tower (3) of an ammonium sulfate absorption subsystem so as to be absorbed by the ammonia gas, and the ammonia nitrogen stripping tower (2) comprises a water distribution and distribution device (209), the deamination filler area (203), a gas distribution area (204), a digestive juice buffer area (205) and a demisting area (202);
the ammonium sulfate absorption subsystem mainly comprises an ammonium sulfate absorption tower (3) used for absorbing the ammonia gas generated by the ammonia nitrogen stripping tower (2) by sulfuric acid, and the ammonium sulfate absorption tower (3) comprises a sulfuric acid absorption packing area, an ammonium sulfate buffer area (305) and a demister (306).
2. The anaerobic system capable of tolerating high-concentration ammonia nitrogen as claimed in claim 1, wherein the distribution water device (209) is of an anti-clogging large-hole structure and comprises a plurality of water distribution pipe holes with upward openings, and an inverted umbrella structure is arranged at the upper part of each water distribution pipe hole; the bottom of the gas distribution area is connected with a blower, a gas distribution grid plate (211) is arranged, a 50-100mm liquid accumulation area is arranged on the gas distribution grid plate (211), and an overflow weir plate is arranged on the side surface.
3. The anaerobic system capable of tolerating high concentration of ammonia nitrogen according to claim 1, characterized in that the digester buffer zone (205) is connected with a digester circulation pump (4); the deammoniation packing area (203) is provided with more than two stages in the tower, the packing supporting plate (210) adopts a porous grid plate, wherein the height of each stage of packing area is less than or equal to 1.0 m.
4. The anaerobic system capable of tolerating high-concentration ammonia nitrogen as claimed in claim 1, wherein the anaerobic reactor (1), the ammonia nitrogen stripping tower (2) and the ammonium sulfate absorption tower (3) are all sealed structures, the biogas generated by the anaerobic reactor (1) is pressurized and fed to a biogas utilization facility, the stripping blower (5) blows air into the ammonia nitrogen stripping tower (2), the ammonia gas is absorbed by the ammonium sulfate absorption tower (3) and then positively pressurized and fed to a burning device or high altitude for discharge, and the stripping air source of the stripping blower (5) adopts biogas or air.
5. The anaerobic system capable of tolerating high-concentration ammonia nitrogen as claimed in claim 1, wherein the demisting zone (202) comprises a screen plate grid (208), a wire mesh demister (207) and a flap demister (206), the top of the screen plate grid is communicated with the air outlet pipe, the wire mesh demister (207) is located at the bottom of the flap demister (206), the 8mm screen plate grid (208) is arranged at the lower layer of the wire mesh demister (207), the aperture of the wire mesh demister (207) is larger than or equal to 50 meshes, and the porosity of the flap demister (206) is larger than or equal to 95%.
6. The anaerobic system capable of tolerating high concentration ammonia nitrogen as claimed in claim 1, wherein in the ammonium sulfate absorption subsystem, the sulfuric acid absorption packing area is divided into upper and lower layers, the upper layer adopts sulfuric acid spraying to absorb ammonia gas, and is connected with a sulfuric acid storage tank (8) and a sulfuric acid feeding pump (7), and the lower layer adopts tower inner circulation liquid to absorb ammonia gas; the ammonium sulfate buffer area (305) is provided with a liquid level meter and a pH meter which are connected with an ammonium sulfate circulating pump (6) and a sulfuric acid adding pump (7).
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| CN114315055A (en) * | 2022-01-28 | 2022-04-12 | 普拉克环保系统（北京）有限公司 | Anaerobic system capable of tolerating high-concentration ammonia nitrogen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114315055A (en) * | 2022-01-28 | 2022-04-12 | 普拉克环保系统（北京）有限公司 | Anaerobic system capable of tolerating high-concentration ammonia nitrogen |
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