CN214881325U - Device for simultaneously removing hydrogen sulfide and nitric acid nitrogen - Google Patents
Device for simultaneously removing hydrogen sulfide and nitric acid nitrogen Download PDFInfo
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- CN214881325U CN214881325U CN202121381705.4U CN202121381705U CN214881325U CN 214881325 U CN214881325 U CN 214881325U CN 202121381705 U CN202121381705 U CN 202121381705U CN 214881325 U CN214881325 U CN 214881325U
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- hydrogen sulfide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The utility model discloses a get rid of device of hydrogen sulfide and nitric acid nitrogen simultaneously, include: the waste water storage device is used for storing the nitric acid nitrogen waste water; the spraying tower is arranged in the waste water storage device, the bottom of the spraying tower is communicated with the waste water storage device, the lower portion of the spraying tower is connected with an air inlet pipeline for introducing methane containing hydrogen sulfide, the top of the spraying tower is connected with an air outlet pipeline, the waste water storage device is connected to the spraying tower through a waste water circulating pipeline so as to remove the hydrogen sulfide in the methane entering the spraying tower, and the waste water circulating pipeline is provided with a circulating pump. The utility model provides a get rid of device of hydrogen sulfide and nitric acid nitrogen simultaneously can realize treating waste with useless, and is energy-concerving and environment-protective.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, in particular to get rid of device of hydrogen sulfide and nitric acid nitrogen simultaneously.
Background
The biogas is a clean energy, and if the biogas is directly discharged into the atmosphere, the biogas is a pollution and a waste, so that the biogas is treated and then utilized as a main disposal mode at present. According to the difference of anaerobic fermentation raw materials, the content of hydrogen sulfide in the biogas can reach 1000-15000 ppm, the biogas containing the hydrogen sulfide generates sulfuric acid after being combusted, the biogas has strong corrosivity, severe corrosion can be caused to a conveying pipeline and used equipment, the service life of the equipment is shortened, and the normal operation of the equipment is influenced.
The biogas needs to remove hydrogen sulfide before use, and chemical wet desulphurization and dry desulphurization are commonly used at present. And adding alkali liquor for chemical wet desulphurization to react with hydrogen sulfide to generate sodium sulfide or elemental sulfur, wherein the use amount of the alkali liquor is large, and the operation cost is high. The dry desulfurization adopts an iron system desulfurizer which reacts with hydrogen sulfide, and the desulfurizer is easily saturated and blocked, and has large replacement amount and large replacement workload.
If drinking water polluted by nitrate nitrogen or nitrite nitrogen for a long time, physical diseases such as intelligence decline and slow response of children can be caused. Nitrate can be converted into nitrite in human body under the action of related enzyme in vivo, nitroso compounds with chemical stability can be formed under the action of some nitrogenous organic compounds, and the compounds can directly cause canceration, deformity and mutation of human body cells, thereby damaging the normal operation and health of human body.
The method is used for removing the nitric acid nitrogen in the wastewater, generally adopts autotrophic denitrifying bacteria to carry out denitrification, the required carbon-nitrogen ratio is generally 4: 1, a large amount of carbon source is consumed, the nitric acid nitrogen is reduced through denitrification and is converted into nitrogen gas to be removed, the denitrification removal efficiency is influenced by the factors such as wastewater water temperature, pH, toxic and harmful substances, reflux ratio, dissolved oxygen and the like, and the operation and management are complex.
Disclosure of Invention
The utility model aims at providing a get rid of device of hydrogen sulfide and nitric acid nitrogen simultaneously, but hydrogen sulfide reaction in nitric acid nitrogen waste water and the marsh gas realizes treating waste with one another.
Based on the above problem, the utility model provides a technical scheme is:
an apparatus for simultaneously removing hydrogen sulfide and nitrogen nitrate comprising:
the waste water storage device is used for storing the nitric acid nitrogen waste water; and
the spraying tower is arranged in the waste water storage device, the bottom of the spraying tower is communicated with the waste water storage device, the lower portion of the spraying tower is connected with an air inlet pipeline for introducing methane containing hydrogen sulfide, the top of the spraying tower is connected with an air outlet pipeline, the waste water storage device is connected to the spraying tower through a waste water circulating pipeline so as to remove the hydrogen sulfide in the methane entering the spraying tower, and the waste water circulating pipeline is provided with a circulating pump.
In some embodiments, a plurality of packing layers are arranged in the spray tower at intervals along the height direction, a spray device is arranged above each packing layer, and the waste water circulation pipeline is connected to the spray devices.
In some embodiments, the spray device comprises a spray pipe and a plurality of spray heads arranged on the spray pipe, and the spray pipe is connected to the wastewater circulating pipeline.
In some of these embodiments, the top of the spray tower is provided with a demisting layer.
In some embodiments, a first solenoid valve is disposed on the intake line.
In some embodiments, the gas outlet pipeline is provided with a second electromagnetic valve and a hydrogen sulfide online monitor.
In some embodiments, the wastewater storage device is connected with a lye feeding pipeline.
In some of these embodiments, the waste water storage device is connected to an inlet pipe and an outlet pipe.
Compared with the prior art, the utility model has the advantages that:
1. the nitric acid nitrogen wastewater reacts with hydrogen sulfide in the methane, so that secondary pollution is avoided, and the energy is saved and the environment is protected;
2. the treatment device has simple structure, and does not have complex operations such as desulfurizer replacement, organic carbon source addition, dissolved oxygen control in water, reflux ratio control and the like;
3. organic carbon sources with the concentration of nitric acid and nitrogen being more than 4 times of that of nitric acid are not required to be added, limestone is used as alkalinity supplement, and the operation cost is low;
4. the temperature of the wastewater is kept between 33 and 37 ℃, the autotrophic denitrifying bacteria have strong metabolic capability, fast reaction speed and high treatment efficiency; the temperature is constant, and the treatment efficiency is stable;
5. the treatment device has good tolerance to hydrogen sulfide and nitric acid nitrogen, and can bear high-concentration hydrogen sulfide (1000-10000 ppm) and nitric acid nitrogen (100-3000 ppm);
6. the pollutant removal rate is high; the content of hydrogen sulfide in the treated biogas is less than 100ppm, the removal rate is 90-99%, and the removal rate of nitric acid and nitrogen is 95-99%.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, 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 structural diagram of an embodiment of the apparatus for simultaneously removing hydrogen sulfide and nitric acid nitrogen of the present invention;
wherein:
1. a waste water storage device;
2. a spray tower; 2-1, a filler layer; 2-2, a spraying device; 2-2a, a spray pipe; 2-2b, a spray head; 2-3, a defogging layer;
3. an air intake line;
4. a water inlet pipe;
5. a water outlet pipe;
6. a wastewater circulation line;
7. a circulation pump;
8. an air outlet pipeline;
9. hydrogen sulfide on-line monitoring instrument;
10. a first solenoid valve;
11. a second solenoid valve;
12. an alkali liquor feeding pipeline.
Detailed Description
The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.
Referring to fig. 1, for the utility model discloses the structural schematic diagram provides a get rid of device of hydrogen sulfide and nitric acid nitrogen simultaneously, including waste water storage device 1 that is used for saving nitric acid nitrogen waste water, and spray column 2, spray column 2 sets up in waste water storage device 1, and the bottom is linked together with waste water storage device 1, there is an air inlet pipeline 3 that is used for letting in the hydrogen sulfide marsh gas that contains in the sub-unit connection of spray column 2, the top of spray column 2 is connected with air outlet pipeline 8, waste water storage device 1 is connected to spray column 2 through waste water circulation pipeline 6, hydrogen sulfide in the hydrogen sulfide marsh gas that contains with getting into spray column 2, be equipped with circulating pump 7 on waste water circulation pipeline 6. The waste water storage device 1 is connected with a water inlet pipe 4 for receiving nitric acid nitrogen waste water, and is also provided with a water outlet pipe 5 for discharging the treated waste water.
A plurality of packing layers 2-1 are arranged in the spray tower 2 at intervals along the height direction, a spray device 2-2 is arranged above each packing layer 2-1, a waste water circulating pipeline 6 is connected to the spray devices 2-2, the ascending flow velocity of the biogas is controlled to be 0.05-0.1 m/s, and the height of the spray tower 2 is 8-15 m. Specifically, the spraying device 2-2 comprises a spraying pipe 2-2a and a plurality of spray heads 2-2b arranged on the spraying pipe 2-2a, and the spraying pipe 2-2a is connected to a wastewater circulating pipeline 6. The packing layer 2-1 adopts the packing which is favorable for the attachment of microorganisms in the prior art, such as volcanic rock, ceramsite, pall ring and the like.
In order to remove the moisture contained in the biogas, a demisting layer 2-3 is arranged at the top of the spray tower 2, and the demisting layer 2-3 is the prior art, which is not described in detail herein.
The gas inlet pipeline 3 is provided with a first electromagnetic valve 10, the gas outlet pipeline 8 is provided with a second electromagnetic valve 11 for controlling the opening and closing of the pipelines, and the gas outlet pipeline 8 is also provided with a hydrogen sulfide online monitor 9 for detecting the concentration of hydrogen sulfide in the marsh gas discharged by the spray tower in real time.
The oxidation-reduction reaction process can generate hydrogen ions, the pH of the liquid is gradually reduced, and in order to prevent the pH from being too low and inhibit the growth of autotrophic denitrifying bacteria, the waste water storage device 1 is also connected with an alkali liquor adding pipeline 12 for periodically adding alkali liquor to neutralize the hydrogen ions in the waste water. The pH value of the wastewater is ensured to be 6.5-8.0, limestone can be used as a source of alkalinity, a certain amount of total phosphorus in the wastewater is removed by dissolving the limestone through hydrogen ions generated by oxidation reduction, and a certain amount of bicarbonate is provided for autotrophic denitrifying bacteria as an inorganic carbon source. And a certain amount of inorganic nutrient salts such as phosphorus, iron and the like are added to the bottom of the treatment device at regular intervals, so that the oxidation-reduction reaction can be accelerated. The waste water storage device 1 can be provided with a heating device to ensure that the temperature of the nitric acid nitrogen waste water is kept at 33-37 ℃, so that the autotrophic denitrifying bacteria have good activity.
The utility model discloses a working process does: the method comprises the steps that methane containing hydrogen sulfide enters the lower portion of a spray tower 2, wastewater containing nitric acid and nitrogen enters a wastewater storage device 1, the wastewater containing nitric acid and nitrogen is lifted to a spray device 2-2 through a circulating pump 7, the methane containing hydrogen sulfide and the wastewater containing nitric acid and nitrogen are in countercurrent contact, through acclimation and culture for a period of time, autotrophic denitrifying microorganisms are gradually enriched in a packing layer 2-1, autotrophic denitrifying bacteria use hydrogen sulfide as an electron donor, nitric acid and nitrogen serve as electron acceptors to perform oxidation-reduction reaction to generate elemental sulfur (or sulfate radicals) and nitrogen, the desulfurized methane is dehydrated and discharged through a defogging layer 2-3, and an online hydrogen sulfide monitor 9 monitors the concentration of hydrogen sulfide in real time.
The above examples are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable one skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. An apparatus for simultaneously removing hydrogen sulfide and nitric acid nitrogen, comprising:
the waste water storage device is used for storing the nitric acid nitrogen waste water; and
the spraying tower is arranged in the waste water storage device, the bottom of the spraying tower is communicated with the waste water storage device, the lower portion of the spraying tower is connected with an air inlet pipeline for introducing methane containing hydrogen sulfide, the top of the spraying tower is connected with an air outlet pipeline, the waste water storage device is connected to the spraying tower through a waste water circulating pipeline so as to remove the hydrogen sulfide in the methane entering the spraying tower, and the waste water circulating pipeline is provided with a circulating pump.
2. The apparatus for simultaneous removal of hydrogen sulfide and nitrogen nitrate according to claim 1, characterized in that: a plurality of packing layers are arranged in the spray tower at intervals along the height direction, a spray device is arranged above each packing layer, and the waste water circulating pipeline is connected to the spray devices.
3. The apparatus for simultaneous removal of hydrogen sulfide and nitrogen nitrate according to claim 2, characterized in that: the spraying device comprises a spraying pipe and a plurality of spray heads arranged on the spraying pipe, and the spraying pipe is connected to the wastewater circulating pipeline.
4. The apparatus for simultaneous removal of hydrogen sulfide and nitrogen nitrate according to claim 2, characterized in that: and a defogging layer is arranged at the top of the spray tower.
5. The apparatus for simultaneous removal of hydrogen sulfide and nitrogen nitrate according to claim 1, characterized in that: and a first electromagnetic valve is arranged on the air inlet pipeline.
6. The apparatus for simultaneous removal of hydrogen sulfide and nitrogen nitrate according to claim 1, characterized in that: and the gas outlet pipeline is provided with a second electromagnetic valve and a hydrogen sulfide on-line monitor.
7. The apparatus for simultaneous removal of hydrogen sulfide and nitrogen nitrate according to claim 1, characterized in that: the waste water storage device is connected with an alkali liquor feeding pipeline.
8. The apparatus for simultaneous removal of hydrogen sulfide and nitrogen nitrate according to claim 1, characterized in that: the waste water storage device is connected with a water inlet pipe and a water outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121381705.4U CN214881325U (en) | 2021-06-21 | 2021-06-21 | Device for simultaneously removing hydrogen sulfide and nitric acid nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121381705.4U CN214881325U (en) | 2021-06-21 | 2021-06-21 | Device for simultaneously removing hydrogen sulfide and nitric acid nitrogen |
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| Publication Number | Publication Date |
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| CN214881325U true CN214881325U (en) | 2021-11-26 |
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| CN202121381705.4U Active CN214881325U (en) | 2021-06-21 | 2021-06-21 | Device for simultaneously removing hydrogen sulfide and nitric acid nitrogen |
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2021
- 2021-06-21 CN CN202121381705.4U patent/CN214881325U/en active Active
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