CN206916096U - A kind of methane bio-desulfurization device - Google Patents
A kind of methane bio-desulfurization device Download PDFInfo
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- CN206916096U CN206916096U CN201720319433.2U CN201720319433U CN206916096U CN 206916096 U CN206916096 U CN 206916096U CN 201720319433 U CN201720319433 U CN 201720319433U CN 206916096 U CN206916096 U CN 206916096U
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 80
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title abstract description 43
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 238000012856 packing Methods 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- 238000005276 aerator Methods 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 11
- 239000000523 sample Substances 0.000 claims abstract description 8
- 239000005864 Sulphur Substances 0.000 claims abstract description 4
- 230000023556 desulfurization Effects 0.000 claims description 74
- 229910052717 sulfur Inorganic materials 0.000 claims description 43
- 239000011593 sulfur Substances 0.000 claims description 43
- 239000007788 liquid Substances 0.000 claims description 35
- 239000000243 solution Substances 0.000 claims description 32
- 235000015097 nutrients Nutrition 0.000 claims description 25
- 238000001556 precipitation Methods 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000012895 dilution Substances 0.000 claims description 6
- 238000010790 dilution Methods 0.000 claims description 6
- 244000005700 microbiome Species 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 5
- 230000012010 growth Effects 0.000 claims description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 17
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 17
- 238000007599 discharging Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 241000894006 Bacteria Species 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000002503 metabolic effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model provides a kind of methane bio-desulfurization device, including elemental sulfur settling zone, methane bio-desulfurization area and the spraying zone set gradually from bottom to top in tower body；Elemental sulfur settling zone is provided with back taper desulphurization bucket and sulphur discharging pipeline；Methane bio-desulfurization area is provided with dish type aerator, dissolved oxygen probe and packing layer, and desulphurization reaction pond is formed by the region between packing layer lower end and dish type aerator；And it is provided with dish type spray thrower and demister in spraying zone；Dish type spray thrower is connected by circulation fluid pipeline and circulating pump with the outer wall in the middle part of desulphurization reaction pond, and blast pipe is vertically arranged with packing layer and spraying zone.Methane bio-desulfurization device of the present utility model, hydrogen sulfide gas high conversion rate, and the acidifying of reaction solution is prevented, the safe and highly efficient operation of methane bio-desulfurization device is realized, and equipment is simple and convenient to operate, operating flexibility is good, suitable for different H2The marsh gas purifying of S concentration.
Description
Technical Field
The utility model relates to a biological desulfurization technical field especially relates to a biological desulphurization unit of marsh gas.
Background
In recent years, with the development of petrochemical, paper making, metallurgy, textile, gas, pharmacy and other industries at home and abroad, some of the industries includeThe anaerobic digestion technology of organic wastes and high-concentration organic wastewater is rapidly developed and promoted, and the clean development and utilization of derived biogas also become main research directions. The marsh gas is a mixed gas mainly containing CH4，CO2And also contains a small amount of N2，H2，O2And H2S。H2S is a colorless extremely toxic gas with odor of the smelly eggs, and has strong corrosivity on pipelines, instruments, metal equipment and the like under the aerobic and damp-heat conditions; combustion H2SO formed by S2And also causes certain pollution to the environment. Generally, H in biogas2The mass concentration of S is 1-12 g/m 3. And when the national environmental protection standard stipulates that the energy of the biogas is utilized, H in the biogas2The mass concentration of S is not more than 20mg/m3. Therefore, the research on the biogas purification and desulfurization process is very important.
The methane desulfurization is the key and difficult point of the methane engineering, and can be divided into direct desulfurization and indirect desulfurization according to different desulfurization principles. The direct desulfurization is to remove H in the methane2S gas is directly separated and removed, and indirect desulfurization is realized by adopting certain treatment methods so as to reduce or inhibit H2S gas production, wherein direct desulfurization includes chemical and biological processes.
At present, wet methods and dry methods used for methane desulfurization belong to chemical methods; in the traditional wet desulphurization process, the consumption cost of alkali liquor is huge; dry desulfurization requires periodic replacement of the packing, which is time consuming, labor intensive and dangerous.
The biological method mainly utilizes the metabolism of desulfurization bacteria to remove H in the methane2S is converted into elemental sulfur or sulfate, so that the resource utilization of sulfur is realized, and the method is low in cost, environment-friendly and widely concerned at home and abroad.
At present, the biological desulfurization technology has been popularized and applied to a certain extent, but a plurality of problems still exist to be solved. As shown in the equation, in the case of excess oxygen, the sulfide is oxidized into sulfate to affect the desulfurization efficiency. This is undesirable during desulfurization. How to control the reasonable aeration quantity to control the final product after biological desulfurization to be elemental sulfur is the key point of the biogas biological desulfurization technology. In addition, the direct mixing of air and biogas has potential safety hazards of explosion, and how to eliminate the potential safety hazards of explosion is a difficult point of the existing biogas biological desulfurization technology.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a biogas biological desulphurization device aiming at the defects of the prior art.
The utility model provides a biological desulphurization unit of marsh gas, its technical scheme of I mainly is the process that utilizes the metabolic action of sulphur bacterium to turn into simple substance or sulphate with the hydrogen sulfide in the marsh gas, and the reaction formula is:
2HS-+O2→2S+2OH-
2HS-+4O2→2SO4 2-+2H+
the sulfur-containing methane is prepared by wetting, porous and active biological filler, and decomposing hydrogen sulfide into simple inorganic substances after adsorption by utilizing the adsorption, absorption and degradation functions of microbial cells on sulfur-containing substances, and the characteristics of small cell size, large surface area, strong adsorbability and various metabolic types of the microbes. The process is divided into 3 stages: one is H2S gas dissolution, wherein gas phase is transferred to liquid phase; secondly, H2S in the liquid phase is absorbed by the microorganism and transferred into the microorganism; III is intracellular H2S is used as nutrient substance and is converted by microorganism, thereby removing H2And (4) purpose of S.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
the utility model provides a biogas biological desulphurization device, which comprises a tower body 1, and a simple substance sulfur precipitation zone, a biogas biological desulphurization zone and a spraying zone which are arranged in the tower body 1 from bottom to top in sequence; wherein,
the elemental sulfur precipitation zone is sequentially provided with an inverted conical sulfur discharge hopper 2 and a sulfur discharge pipe 3 from bottom to top, one end of the sulfur discharge pipe 3 is communicated with the lower end of the inverted conical sulfur discharge hopper 2, and the outer wall of the elemental sulfur precipitation zone is provided with a sulfur foam outlet 4 communicated with the other end of the sulfur discharge pipe 3;
the biogas biological desulfurization area is sequentially provided with a disc-shaped aerator 5, a dissolved oxygen probe 8 and a packing layer 9 from bottom to top, a desulfurization reaction tank 10 is formed by the area between the lower end of the packing layer 9 and the disc-shaped aerator 5, the outer wall of the desulfurization reaction tank 10 is provided with a biogas inlet 11, a liquid level meter 12, an air inlet 7 and a nutrient solution inlet 13, the liquid level meter 12 is positioned below the biogas inlet 11, the air inlet 7 is communicated with the disc-shaped aerator 5, and the upper end of the disc-shaped aerator 5 is provided with a plurality of microporous aeration heads 6; and
a disc-shaped sprayer 15 and a demister 17 are sequentially arranged in the spraying area from bottom to top, and a plurality of microporous spray heads 16 are arranged on the lower end face of the disc-shaped sprayer 15;
the disc-shaped sprayer 15 is communicated with the outer wall of the middle part of the desulfurization reaction tank 10 through a circulating liquid pipeline 18 and a circulating pump 19 arranged on the circulating liquid pipeline 18, an exhaust pipe 24 is vertically arranged in the packing layer 9 and the spraying area, an air inlet 25 at the upper end of the exhaust pipe 24 is positioned between the demister 22 and the top wall of the tower body 1, and an air outlet 26 at the lower end of the exhaust pipe 23 is arranged on the outer wall of the packing layer 9.
Further, in the biogas biological desulfurization device, the volume ratio of the elemental sulfur precipitation area to the biogas biological desulfurization area is 1: 2-1: 3.
further, in the biogas biological desulfurization device, the height-diameter ratio of the tower body 1 is 6: 1-8: 1.
further, in the biogas biological desulfurization apparatus, the circulating liquid pipe 18 is provided with a waste liquid discharge port 20, a heat exchanger 21, a temperature sensor 22 and a pH sensor 23.
Further, in the biogas biological desulfurization apparatus, a gas analyzer 27 is disposed at the exhaust port 26 of the exhaust pipe 24.
Further, in the biogas biological desulfurization device, the exhaust pipeline 24 is arranged close to the inner wall of the tower body 1, and the exhaust port 26 at the lower end of the exhaust pipeline 24 is arranged on the outer wall of the lower part of the packing layer 9.
Furthermore, in the biogas biological desulfurization device, a dilution water pipeline 14 is arranged at the nutrient solution inlet 13.
Furthermore, in the biogas biological desulfurization device, the filler layer 9 is filled with a soft filler for biofilm culturing growth of microorganisms.
Furthermore, in the biogas biological desulphurization device, the height between the disc-shaped sprayer (15) and the upper end of the packing layer 9 is 10-15 cm; the distance between the lower end of the packing layer 9 and the liquid level of the nutrient solution in the desulfurization reaction tank 10 is 60-80 cm.
further, in the biogas biological desulfurization device, the bottom angle α of the inverted conical sulfur discharge hopper 2 is 50-70 degrees.
The utility model adopts the above technical scheme, compare with prior art, have following technological effect:
the utility model discloses a biological desulphurization unit of gas utilizes dissolved oxygen probe survey reaction liquid in the biological desulfurization district of marsh gas dissolved oxygen concentration, through the aeration volume of control air, makes dissolved oxygen concentration control at 0.1mg/L, impels hydrogen sulfide gas to the conversion of simple substance sulphur, and prevents the acidizing of reaction liquid, realizes the safe high-efficient operation of biological desulphurization unit of marsh gas; elemental sulfur is formed, and partial treatment cost can be recovered; due to the addition of the demister, the burden of a subsequent dehydration section is reduced; the methane outlet extends out from the lower part along the tower wall, so that the equipment volume is reduced, and pipelines and flanges are convenient to install; the addition of the nutrient solution heat exchanger ensures that the strains are proliferated at a proper temperature; purification levelHigh purity of H in gas2The content of S can be controlled at 4mg/m3The following; the device has simple equipment, no complex control loop and no free H behind the absorption unit2S exists, the operation is safe, and the management is easy; good operation flexibility, and the desulfurizing bacteria can be selected according to H in the raw material gas2S concentration fluctuation automatically adjusts growth rate, and is suitable for different H2And (5) purifying the methane with the concentration of S.
Drawings
FIG. 1 is a schematic structural view of a biogas biological desulfurization device of the present invention;
the system comprises a tower body 1, an inverted conical sulfur discharge hopper 2, a sulfur discharge pipe 3, a sulfur foam outlet 4, a disc-shaped aerator 5, a microporous aeration head 6, an air inlet 7, a dissolved oxygen probe 8, a filler layer 9, a desulfurization reaction tank 10, a biogas inlet 11, a liquid level meter 12, a nutrient solution inlet 13, a dilution water pipeline 14, a disc-shaped sprayer 15, a microporous spray head 16, a demister 17, a circulating liquid pipeline 18, a circulating pump 19, a waste liquid outlet 20, a heat exchanger 21, a temperature sensor 22, a pH sensor 23, an exhaust pipeline 24, an air inlet 25, an exhaust outlet 26 and a gas analyzer 27.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a biogas biological desulfurization device, which comprises a tower body 1, and a simple substance sulfur precipitation zone, a biogas biological desulfurization zone and a spraying zone which are arranged in the tower body 1 from bottom to top in sequence; the device comprises an elemental sulfur precipitation zone, a sulfur discharge pipe 3, a sulfur foam outlet 4 and a sulfur foam outlet, wherein the elemental sulfur precipitation zone is sequentially provided with an inverted conical sulfur discharge hopper 2 and the sulfur discharge pipe 3 from bottom to top, one end of the sulfur discharge pipe 3 is communicated with the lower end of the inverted conical sulfur discharge hopper 2, and the outer wall of the elemental sulfur precipitation zone is provided with the sulfur foam outlet 4 communicated with the other end of the sulfur discharge pipe 3; the biogas biological desulfurization area is sequentially provided with a disc-shaped aerator 5, a dissolved oxygen probe 8 and a packing layer 9 from bottom to top, a desulfurization reaction tank 10 is formed by the area between the lower end of the packing layer 9 and the disc-shaped aerator 5, the outer wall of the desulfurization reaction tank 10 is provided with a biogas inlet 11, a liquid level meter 12, an air inlet 7 and a nutrient solution inlet 13, the liquid level meter 12 is positioned below the biogas inlet 11, the air inlet 7 is communicated with the disc-shaped aerator 5, and the upper end of the disc-shaped aerator 5 is provided with a plurality of microporous aeration heads 6; a disk-shaped sprayer 15 and a demister 17 are sequentially arranged in the spraying area from bottom to top, and a plurality of microporous spray heads 16 are arranged on the lower end face of the disk-shaped sprayer 15; the disc-shaped sprayer 15 is communicated with the outer wall of the middle part of the desulfurization reaction tank 10 through a circulating liquid pipeline 18 and a circulating pump 19 arranged on the circulating liquid pipeline 18, an exhaust pipe 24 is vertically arranged in the packing layer 9 and the spraying area, an air inlet 25 at the upper end of the exhaust pipe 24 is positioned between a demister 22 and the top wall of the tower body 1, and an air outlet 26 at the lower end of the exhaust pipe 23 is arranged on the outer wall of the packing layer 9.
In the biogas biological desulfurization device, the dissolved oxygen concentration in the nutrient solution (namely, the desulfurization reaction solution) in the desulfurization reaction tank 10 is measured by the dissolved oxygen probe 8, the aeration quantity of air is controlled by the air fan arranged at the air inlet 7, and air is accurately added by frequency conversion control, so that the dissolved oxygen concentration in the desulfurization reaction tank 10, namely, the desulfurization reaction solution is maintained at 0.1mg/L, hydrogen sulfide is promoted to be converted to elemental sulfur under the action of desulfurization bacteria, and excessive acidification of the desulfurization reaction solution is prevented. And the excessive oxygen displays an alarm and then closes an air fan on the air inlet system, so that the mixing of oxygen and methane in the tower is avoided, and the potential explosion hazard is eliminated. The liquid level of the nutrient solution in the desulfurization reaction tank 10 is displayed in real time through the liquid level meter 12, so that the constant liquid level in the biogas biological desulfurization device is ensured. The biological filler is put into a synchronous anaerobic denitrification desulphurization reactor which runs stably for a long time for biofilm culturing, and the soft filler after biofilm culturing is put back into the filler layer 9 of the tower body 1 of the biological desulphurization device again. At this time, in the biogas biological desulfurization area, the hydrogen sulfide gas entering from the biogas inlet 11 is continuously conveyed upwards and is in reverse contact with the spray liquid generated from the spray area disc-shaped sprayer 15, so that the hydrogen sulfide gas is dissolved in the nutrient solution in the desulfurization reaction tank 10, and the hydrogen sulfide is converted into elemental sulfur under the action of desulfurization bacteria with a desulfurization function. Under the action of gravity, the formed elemental sulfur sludge is gradually precipitated into the inverted cone-shaped sulfur discharge hopper 2, and the biogas biological desulfurization device is discharged from the sulfur foam outlet 4 through the sulfur discharge pipe 3 at the bottom of the inverted cone-shaped sulfur discharge hopper 2, so that the purpose of recovering the elemental sulfur is achieved.
In the biogas biological desulfurization device, a spraying area is positioned at the upper part of a tower body 1, a disc-shaped sprayer 15 in the spraying area extracts nutrient solution from a desulfurization reaction tank 10 through a circulating liquid pipeline 18 and a circulating pump 19 to spray the nutrient solution, the PH of the nutrient solution is controlled between 1 and 5, the absorption of the nutrient solution on hydrogen sulfide gas in a gas phase can be enhanced while the growth of desulfurization bacteria is promoted, specifically, the nutrient solution is pumped into the disc-shaped sprayer 15 through the circulating pump 19, and the uniform spraying of the spray solution is realized through a micropore spray nozzle 16.
In the biological desulphurization device for the biogas, the elemental sulfur precipitation area is positioned at the bottom of the tower body 1, the hydrogen sulfide gas in the biogas forms elemental sulfur under the action of desulphurization bacteria, the formed elemental sulfur gradually precipitates into the inverted cone-shaped sulfur discharge hopper 2 under the action of gravity, and the sulfur-containing sludge is discharged out of the biological desulphurization device for the biogas from the sulfur foam outlet 4 through the sulfur discharge pipe 3 at the bottom of the inverted cone-shaped sulfur discharge hopper 2, so that the purpose of recovering the elemental sulfur is achieved.
On the basis of the technical scheme, in the biogas biological desulphurization device, the volume ratio of the elemental sulfur precipitation area to the biogas biological desulphurization area is 1: 2-1: 3; preferably, the volume ratio of the elemental sulfur precipitation zone to the biogas biological desulfurization zone is 1: 2.5. further, the tower body 1 has a height-diameter ratio of 6: 1-8: 1; preferably, the height to diameter ratio of the tower 1 is 7: 1.
on the basis of the above technical solution, in the biogas biological desulfurization apparatus, the circulating liquid pipe 18 is provided with a waste liquid discharge port 20, a heat exchanger 21, a temperature sensor 22 and a pH sensor 23. In order to ensure the optimal activity of bacteria, the temperature of the nutrient solution in the desulfurization reaction tank 10 is adjusted and controlled by a heat exchanger 21 and a temperature sensor 22. The pH sensor 23 is used to control the quality (pH value) of the nutrient solution, for example, when the pH is lower than a set value, fresh nutrient solution and dilution water are automatically added into the desulfurization reaction tank 10 through the nutrient solution inlet 13 and the dilution water pipe 14, the nutrient solution is added at regular time by the metering pump, and the overall liquid level balance is controlled by the liquid level meter 12. At the same time, the waste liquid is automatically discharged through the waste liquid outlet 20, and the liquid level is maintained in balance. The dissolved oxygen concentration in the reaction solution was measured by the dissolved oxygen probe 8, and the dissolved oxygen concentration was controlled to 0.1mg/L by controlling the aeration amount of air, thereby promoting the conversion of hydrogen sulfide gas to elemental sulfur and preventing the acidification of the reaction solution.
On the basis of the technical scheme, in the biogas biological desulfurization device, the exhaust port 26 of the exhaust pipe 24 is provided with the gas analyzer 27, the gas analyzer 27 monitors the concentration of residual oxygen and is interlocked with the air fan, and the excessive oxygen displays the alarm and then closes the air inlet system, so that the mixing of oxygen and biogas in the tower is avoided, and the explosion hidden trouble is eliminated.
On the basis of the technical scheme, in the biogas biological desulphurization device, an exhaust pipeline 24 is arranged close to the inner wall of the tower body 1, and an exhaust port 26 at the lower end of the exhaust pipeline 24 is arranged on the outer wall of the lower part of the packing layer 9.
On the basis of the technical scheme, in the biogas biological desulphurization device, a dilution water pipeline 14 is arranged at the nutrient solution inlet 13.
on the basis of the technical scheme, in the biogas biological desulfurization device, a packing layer 9 is filled with soft packing for biofilm culturing growth of microorganisms, the height between a disc-shaped sprayer (15) and the upper end of the packing layer 9 is 10-15cm, the height between the lower end of the packing layer 9 and the liquid level of nutrient solution in a desulfurization reaction tank 10 is 60-80 cm., the bottom angle α of an inverted cone-shaped sulfur discharge hopper 2 is 50-70 degrees, and preferably, the bottom angle α of the inverted cone-shaped sulfur discharge hopper 2 is 60 degrees.
On the basis of the technical scheme, in the biogas biological desulfurization device, the thickness of a demister 17 arranged at the top of the tower is 20-50 cm, desulfurized biogas flows through the demister at a certain speed, the movement direction of the biogas is changed rapidly and continuously, fog drops in the biogas collide with blades of the demister 17 to be captured under the action of centrifugal force and inertia, the fog drops are gathered to form water flow and fall into a desulfurization reaction tank 10 through a packing layer 9 under the action of gravity, gas-liquid separation is realized, the biogas flowing through the demister 17 reaches the defogging requirement and is discharged through an exhaust port 26 of an exhaust pipeline 24, and the purified biogas is analyzed and detected through a gas analyzer 27.
The present invention has been described in detail with reference to the specific embodiments, but the present invention is only by way of example and is not limited to the specific embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are intended to be within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.
Claims (7)
1. A biogas biological desulphurization device is characterized by comprising a tower body (1), and a simple substance sulfur precipitation zone, a biogas biological desulphurization zone and a spraying zone which are arranged in the tower body (1) from bottom to top in sequence; wherein,
the sulfur removal device is characterized in that the elemental sulfur precipitation zone is sequentially provided with an inverted conical sulfur discharge hopper (2) and a sulfur discharge pipe (3) from bottom to top, one end of the sulfur discharge pipe (3) is communicated with the lower end of the inverted conical sulfur discharge hopper (2), and a sulfur foam outlet (4) communicated with the other end of the sulfur discharge pipe (3) is formed in the outer wall of the elemental sulfur precipitation zone;
the biogas biological desulfurization area is sequentially provided with a disc-shaped aerator (5), a dissolved oxygen probe (8) and a packing layer (9) from bottom to top, a desulfurization reaction tank (10) is formed by an area between the lower end of the packing layer (9) and the disc-shaped aerator (5), a biogas inlet (11), a liquid level meter (12), an air inlet (7) and a nutrient solution inlet (13) are arranged on the outer wall of the desulfurization reaction tank (10), the liquid level meter (12) is positioned below the biogas inlet (11), the air inlet (7) is communicated with the disc-shaped aerator (5), and the upper end of the disc-shaped aerator (5) is provided with a plurality of microporous aeration heads (6); and
a disc-shaped sprayer (15) and a demister (17) are sequentially arranged in the spraying area from bottom to top, and a plurality of microporous spray heads (16) are arranged on the lower end face of the disc-shaped sprayer (15);
the disc-shaped sprayer (15) is communicated with the outer wall of the middle part of the desulfurization reaction tank (10) through a circulating liquid pipeline (18) and a circulating pump (19) arranged on the circulating liquid pipeline (18), an exhaust pipeline (24) is vertically arranged in the packing layer (9) and the spraying area, an air inlet (25) at the upper end of the exhaust pipeline (24) is positioned between the demister (17) and the top wall of the tower body (1), and an air outlet (26) at the lower end of the exhaust pipeline (24) is arranged on the outer wall of the packing layer (9);
wherein the volume ratio of the elemental sulfur precipitation zone to the biogas biological desulfurization zone is 1: 2-1: 3;
a waste liquid outlet (20), a heat exchanger (21), a temperature sensor (22) and a pH sensor (23) are arranged on the circulating liquid pipeline (18); and
the exhaust pipeline (24) is arranged close to the inner wall of the tower body (1), and an exhaust port (26) at the lower end of the exhaust pipeline (24) is arranged on the outer wall of the lower part of the packing layer (9).
2. Biogas biological desulphurization unit according to claim 1, wherein the tower (1) has a height to diameter ratio of 6: 1-8: 1.
3. biogas biological desulphurization unit according to claim 1, characterized in that a gas analyzer (27) is provided at the exhaust opening (26) of the exhaust duct (24).
4. Biogas biological desulphurization unit according to claim 1, characterized in that a dilution water conduit (14) is provided at the nutrient solution inlet (13).
5. The biogas biological desulphurization device according to claim 1, wherein the filler layer (9) is filled with a soft filler for biofilm culturing growth of microorganisms.
6. The biogas biological desulphurization device according to claim 1, wherein the height of the disc-shaped sprayer (15) from the upper end of the packing layer (9) is 10-15 cm; the distance between the lower end of the packing layer (9) and the liquid level of the nutrient solution in the desulfurization reaction tank (10) is 60-80 cm.
7. biogas biological desulphurization unit according to claim 1, wherein the bottom angle α of the inverted cone shaped sulphur discharge hopper (2) is 50-70 °.
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| CN113968637A (en) * | 2020-07-22 | 2022-01-25 | 北京时代桃源环境科技股份有限公司 | High-efficient controllable marsh gas biological desulfurization regeneration tank |
| CN113968637B (en) * | 2020-07-22 | 2023-08-29 | 北京时代桃源环境科技股份有限公司 | High-efficient controllable marsh gas biological desulfurization regeneration tank |
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