CN212357164U - Biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste - Google Patents
Biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste Download PDFInfo
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Abstract
The utility model discloses a biogas biological desulfurization device for anaerobic fermentation of kitchen waste, which comprises a first desulfurization tower, a second desulfurization tower and a circulating liquid regeneration tank, wherein the biogas biological desulfurization device for anaerobic fermentation of kitchen waste takes kitchen waste leachate nitrifying liquid as a circulating liquid main body, other nutrient substances do not need to be added, and the medicament cost is low; the nitrifying liquid of the kitchen waste leachate is in an aerobic condition, and the circulating liquid regeneration tank aeration device is low in energy consumption and low in operation cost; the speed of culturing the desulfurization bacteria by the nitrifying liquid of the kitchen waste leachate is high, and the desulfurization efficiency is high; the nitrifying liquid of the kitchen waste leachate is easy to obtain, and the treatment pressure of the kitchen waste leachate is reduced; the device has three operation modes of series operation, parallel operation and cleaning, and has wide application range and high automation degree.
Description
Technical Field
The utility model belongs to the technical field of marsh gas desulfurization, concretely relates to biological desulfurization equipment of marsh gas for kitchen garbage anaerobic fermentation.
Background
Biogas produced during anaerobic biological treatment often contains significant amounts of hydrogen sulfide, typically in concentrations of 1-12 g/m3. The hydrogen sulfide has strong corrosivity to pipelines and equipment; the hydrogen sulfide aqueous solution contacts with steel, so that the steel has the phenomena of hydrogen embrittlement, sulfide stress cracking and the like; sulfur dioxide generated by the combustion of hydrogen sulfide can pollute the atmosphere; when the concentration of hydrogen sulfide in the air is 14-21 mg/m3Sometimes, poisoning symptoms may appear. Therefore, the biogas must be desulfurized before use.
At present, the methods for removing hydrogen sulfide mainly comprise dry desulfurization, wet desulfurization and biological desulfurization. Both dry desulfurization and wet desulfurization belong to chemical desulfurization, and have the defects of high operation cost, difficult sludge treatment and the like. Therefore, in recent years, biological desulfurization techniques have been favored. The biological desulfurization is a process of oxidizing hydrogen sulfide in the biogas into elemental sulfur or sulfate radical by using sulfur bacteria, and the method has the advantages of simple process, mild reaction conditions, low energy consumption and no secondary pollution.
Chinese patent CN108325374A discloses a biological desulfurization method for biogas, which mainly comprises a desulfurization tower, a nutrition tank and a dosing tank, and utilizes compound fertilizer, urea and water to prepare nutrient solution for culturing desulfurization bacteria. Chinese patent CN102604701A discloses a biological desulfurization method for biogas, which mainly comprises a desulfurization tower and a circulating water tank, and anaerobic biogas slurry is used as a circulating liquid main body to reduce the concentration of hydrogen sulfide in the biogas from 5000 ppm to below 200 ppm. However, the existing biological desulfurization methods also have the following disadvantages:
1. the desulfurization device mainly comprises an external water replenishing tank, a circulating water tank or a nutrient solution preparation device, and the nutrient solution is required to be continuously added in the use process, so that the desulfurization operation cost is high;
2. if the anaerobic biogas slurry is used as a circulating liquid main body, the circulating liquid needs to be aerated from an anaerobic condition to an aerobic condition, and the aeration device has high energy consumption and high operation cost;
3. the culture time of the desulfurization bacteria is long, and generally 2 to 3 weeks is needed;
4. the biological desulfurization efficiency is low, and the concentration of the purified methane is generally 200 ppm-300 ppm.
5. Acidic substances and used circulating liquid generated in the biological desulfurization process are easy to adhere to the inner wall of the tower body and the filler layer to form dirt, and the cleaning is troublesome.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a biogas biological desulfurization device for anaerobic fermentation of kitchen waste, which comprises a first desulfurization tower and a second desulfurization tower, wherein an air outlet pipeline, a spraying device, a filling mechanism, an air inlet pipeline and a liquid collecting device are sequentially and respectively arranged in the first desulfurization tower and the second desulfurization tower from top to bottom; the method is characterized in that: the biogas enters the desulfurizing tower from the gas inlet pipeline and passes through the filling mechanism of the desulfurizing tower from bottom to top; circulating liquid sprayed out by the spraying device enters the filling mechanism to perform reverse mass transfer with the methane; the circulating liquid is kitchen waste leachate nitration liquid.
The kitchen waste nitrifying liquid recovery device further comprises a circulating liquid regeneration pool, wherein the circulating liquid regeneration pool comprises a kitchen waste leachate nitrifying liquid inlet and a submerged slag liquid pump; the circulating liquid regeneration tank provides circulating liquid for the spraying device through an under-liquid slag liquid pump; the circulating liquid regeneration pool is communicated with the liquid collecting device, so that circulating liquid in the liquid collecting device enters the circulating liquid regeneration pool.
Further, the kitchen waste leachate nitration liquid is effluent after the kitchen waste leachate is subjected to aerobic treatment.
Furthermore, the circulating liquid regeneration tank is provided with a water inlet pipeline for diluting cooling water.
Furthermore, the gas outlets of the first desulfurizing tower and the second desulfurizing tower are provided with hydrogen sulfide monitors.
Furthermore, a series connection air inlet pipeline is further arranged at the top of the first desulfurizing tower, and the series connection air inlet pipe is connected with the second desulfurizing tower air inlet pipeline.
Furthermore, a thermometer and a heating device are arranged in the first desulfurizing tower and the second desulfurizing tower.
The system further comprises an online monitoring control system, wherein the online monitoring control system is connected with a pressure gauge and a safety valve on the air inlet pipeline; the online monitoring control system is connected with thermometers, heating devices, liquid level meters and hydrogen sulfide monitors in the first desulfurizing tower and the second desulfurizing tower; the on-line monitoring control system is connected with a thermometer, a dissolved oxygen monitoring device, a pH meter and a liquid level meter in the circulating liquid regeneration tank, and the on-line monitoring control system is connected with each valve.
The utility model has the advantages that: the kitchen waste leachate nitrifying liquid contains a carbon source, a nitrogen source and a phosphorus source and is used as a main body of the circulating liquid, other nutrient substances are not required to be added, and the cost of the agent is reduced; the nitrifying liquid is aerobic treatment effluent which is in an aerobic condition, and the aeration energy consumption and the operation cost of the circulating regeneration tank are low; the nitrifying liquid of the kitchen waste leachate is easy to obtain, and the treatment pressure of the kitchen waste leachate is reduced; the kitchen waste leachate nitrifying liquid has various bacteria types and quantities, so that the rapid culture of desulfurization bacteria is facilitated, and the desulfurization effect is excellent; the problem of low primary biological desulfurization efficiency is solved by a series operation mode, the retention time of the biogas in the series mode is 80-200 s, the concentration of hydrogen sulfide in the purified biogas can be as low as 20 ppm, and the method is suitable for the condition of high concentration of hydrogen sulfide in the biogas; the parallel operation mode can improve the desulfurization rate of the system, the retention time of the biogas in the parallel mode is 40-100 s, and the concentration of hydrogen sulfide in the purified biogas can be as low as 150 ppm, so that the method is suitable for the conditions of high biogas yield and relatively low concentration of hydrogen sulfide in the biogas; in the cleaning mode, the first desulfurizing tower and the second desulfurizing tower can be cleaned, overhauled and maintained respectively without stopping the line, and inert gas is introduced to exhaust residual methane in the tower body, so that the safety of personnel and equipment is guaranteed; when negative pressure occurs in the desulfurizing tower, inert gas can be introduced for stabilizing the pressure; the biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste further comprises an online monitoring control system, and the online monitoring control system is used for automatically controlling the temperature of the desulfurization tower, the liquid level of the liquid collecting device, the temperature of the circulating regeneration tank, the concentration of dissolved oxygen, the liquid level and the pH value.
In a word, the biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste takes the kitchen waste leachate nitrifying liquid as the circulating liquid main body, other nutrient substances do not need to be added, and the cost of the medicament is low; the nitrifying liquid of the kitchen waste leachate is in an aerobic condition, and the circulating liquid regeneration tank aeration device is low in energy consumption and low in operation cost; the speed of culturing the desulfurization bacteria by the nitrifying liquid of the kitchen waste leachate is high, and the desulfurization efficiency is high; the nitrifying liquid of the kitchen waste leachate is easy to obtain, and the treatment pressure of the kitchen waste leachate is reduced; the device has three operation modes of series operation, parallel operation and cleaning, and has wide application range and high automation degree.
Drawings
FIG. 1 is a schematic view of a biogas biological desulfurization device for anaerobic fermentation of kitchen waste;
the reference numerals have the following meanings: 1. a first desulfurization tower; 2. a second desulfurization tower; 3. a circulating liquid regeneration tank; 4. an inert gas blower; 5. a first desulfurizing tower methane gas inlet valve; 6. a second desulfurizing tower methane gas inlet valve; 7. an inert gas inlet valve of the first desulfurizing tower; 8. an inert gas inlet valve of the second desulfurizing tower; 9. a first desulfurizing tower air inlet pressure gauge; 10. a second desulfurizing tower air inlet pressure gauge; 11. a first desulfurizing tower spray device; 12. a first desulfurization tower packing mechanism; 13. a first desulfurizing tower heating device; 14. a first desulfurization tower thermometer; 15. a first desulfurizing tower liquid level meter; 16. a first desulfurization tower liquid collecting device; 17. a drain valve of the first liquid collecting device; 18. a first gas outlet valve; 19. a first hydrogen sulfide monitor; 20. a second desulfurizing tower spray device; 21. a second desulfurization tower packing mechanism; 22. a second desulfurizing tower heating device; 23 a second thionizer thermometer; 24. a second desulfurizing tower liquid level meter; 25. a second desulfurization tower liquid collecting device; 26. a drain valve of the second liquid collecting device; 27. a second gas outlet valve; 28. a second desulfurization tower hydrogen sulfide monitor; 29. a second desulfurization tower spray water inlet valve; 30. a first desulfurization tower spray water inlet valve; 31. a series inlet valve; 32. a heating device; 33. a liquid-to-liquid slag pump; 34. a thermometer; 35, a pH meter; 36. a dissolved oxygen monitoring device; 37. an aeration device; 38. a blower; 39. a liquid level meter; 40. a blowoff valve; 41. a kitchen waste leachate nitrifying liquid inlet valve; 42. a diluting cooling water inlet valve; 43. an air intake duct; 44. a second outlet duct; 45. a spray liquid inlet pipe; 46. a first outlet duct; 47. a liquid collecting device liquid discharge pipeline; 48. a blowdown line; 49. a water inlet pipe; 50. and an air inlet pipeline is connected in series.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in figure 1, the utility model discloses a biological desulfurization equipment of marsh gas for kitchen garbage anaerobic fermentation, including first desulfurizing tower 1, second desulfurizing tower 2 and circulation liquid regeneration pond 3.
The first desulfurizing tower 1 is provided with a series-connection air inlet pipeline 50, a first air outlet pipeline 46, a first desulfurizing tower spraying device 11, a first desulfurizing tower filling mechanism 12, a first desulfurizing tower heating device 13, an air inlet pipeline 43 and a first desulfurizing tower liquid collecting device 16 from top to bottom. The first gas outlet pipeline 46 is arranged at the top of the first desulfurization tower 1 and used for discharging purified biogas, the first gas outlet pipeline 46 is provided with a first gas outlet valve 18 and a first hydrogen sulfide detector 19, the first hydrogen sulfide detector 19 is used for monitoring the content of hydrogen sulfide in the purified biogas, and the first gas outlet valve 18 controls the gas displacement; a series air inlet pipeline 50 arranged at the top of the first desulfurizing tower 1 is connected with the air inlet pipeline 43, and the series air inlet valve 31 controls the series or parallel operation of the first desulfurizing tower 1 and the second desulfurizing tower 2; the first desulfurization tower spraying device 11 is arranged at the upper part of the first desulfurization tower 1, a plurality of spraying heads are uniformly distributed on the inner cross section of the tower body, and the spraying heads are connected with a spraying liquid inlet pipeline 45 and used for spraying circulating liquid; a first desulfurizing tower thermometer 14 is arranged on the inner wall of the middle part of the first desulfurizing tower 1 and used for monitoring the temperature of the first desulfurizing tower filling mechanism 12, and a first desulfurizing tower heating device 13 is arranged on the outer wall of the middle part of the tower body and used for maintaining the temperature suitable for the growth of desulfurizing bacteria; the air inlet pipeline 43 is arranged below the first desulfurizing tower filling mechanism 12, the air inlet pipeline 43 is connected with a biogas and inert gas blower 4, the air inlet amount is controlled by a first desulfurizing tower biogas air inlet valve 5 and a first desulfurizing tower inert gas inlet valve 7, and a first desulfurizing tower air inlet pressure gauge 9 displays the air inlet pressure value of the first desulfurizing tower 1; first desulfurizing tower liquid collecting device 16 is located 1 bottoms in first desulfurizing tower, sets up first desulfurizing tower level gauge 15 in first desulfurizing tower liquid collecting device 16 department for monitor first desulfurizing tower liquid collecting device 16's liquid level, when the liquid level reaches the setting value, opens first liquid collecting device drain valve 17, will flow into the circulation liquid regeneration pond 3 because of the circulation liquid discharge in the first desulfurizing tower liquid collecting device 16 of action of gravity.
And the second desulfurization tower 2 is provided with a second gas outlet pipeline 44, a second desulfurization tower spray device 20, a second desulfurization tower filling mechanism 21, a gas inlet pipeline 43 and a second desulfurization tower liquid collecting device 25 from top to bottom. The top of the second desulfurization tower 2 is provided with a second gas outlet pipeline 44 for discharging purified biogas, the second gas outlet pipeline 44 is provided with a second gas outlet valve 27 and a second desulfurization tower hydrogen sulfide detector 28, the second desulfurization tower hydrogen sulfide detector 28 is used for monitoring the content of hydrogen sulfide in the purified biogas, and the second gas outlet valve 27 controls the exhaust amount; the second desulfurizing tower spraying device 20 is arranged at the upper part of the second desulfurizing tower 2, a plurality of spraying heads are uniformly distributed on the inner cross section of the tower body, and the second desulfurizing tower spraying device is connected with a spraying liquid inlet pipeline 45 and is used for spraying circulating liquid; a second desulfurizing tower thermometer 23 is arranged on the inner wall of the middle part of the second desulfurizing tower 2 and used for monitoring the temperature of the second desulfurizing tower filling mechanism 21, and a second desulfurizing tower heating device 22 is arranged on the outer wall of the middle part of the tower body and used for maintaining the temperature suitable for the growth of desulfurizing bacteria; an air inlet pipeline 43 is arranged below the second desulfurizing tower filling mechanism 21, the air inlet pipeline 43 is connected with a biogas and inert gas blower 4, the air inlet amount is controlled by a second desulfurizing tower biogas air inlet valve 6, a second desulfurizing tower inert gas air inlet valve 8 and a series connection air inlet valve 31, and a second desulfurizing tower air inlet pressure gauge 10 displays the air inlet pressure value of the second desulfurizing tower; the second desulfurizing tower liquid collecting device 25 is positioned at the bottom of the second desulfurizing tower 2, a second desulfurizing tower liquid level meter 24 is arranged at the second desulfurizing tower liquid collecting device 25 and used for monitoring the liquid level of the second desulfurizing tower liquid collecting device 25, when the liquid level reaches a set value, a drain valve 26 of the second liquid collecting device is opened, and circulating liquid flowing into the second desulfurizing tower liquid collecting device 25 under the action of gravity is drained into the circulating liquid regeneration tank 3.
The circulating liquid regeneration tank 3 is provided with a heating device 32, a liquid-slag-off pump 33, an aeration device 37, a sewage discharge pipeline 48 and a water inlet pipeline 49, wherein the middle part of the circulating liquid regeneration tank is provided with a thermometer 34, a pH meter 35, a dissolved oxygen monitoring device 36 and a liquid level meter 39 for monitoring the temperature, the pH value, the dissolved oxygen concentration and the liquid level of the circulating liquid regeneration liquid; the aeration device 37 is connected with a blower 38; the blowdown pipeline 48 is arranged at the bottom of the circulating liquid regeneration tank 3, and when the liquid level of the circulating liquid regeneration tank 3 is too high or the index of the circulating liquid is unqualified, the blowdown valve 40 is opened to discharge part of the circulating liquid; and a water inlet pipeline 49 for nitrifying liquid and diluting cooling water of the kitchen waste leachate is arranged at the upper part of the circulating liquid regeneration tank 3, and when the liquid level of the circulating liquid regeneration tank 3 is too low or the index of the circulating liquid is unqualified, a water inlet valve 41 for nitrifying liquid of the kitchen waste leachate and a water inlet valve 42 for diluting cooling water are opened, and the nitrifying liquid and the diluting cooling water of the kitchen waste leachate are supplemented to be used as the circulating liquid.
Example 1
The utility model discloses be applied to marsh gas desulfurization system in certain kitchen garbage processing technology, this embodiment adopts series operation mode, establishes ties first desulfurizing tower 1 and second desulfurizing tower 2 and carries out the desulfurization to marsh gas, and the desorption effect of series operation mode to hydrogen sulfide is excellent, is applicable to the higher condition of hydrogen sulfide concentration in the marsh gas: in the series operation mode, the second desulfurizing tower methane gas inlet valve 6, the first desulfurizing tower inert gas inlet valve 7, the second desulfurizing tower inert gas inlet valve 8 and the first gas outlet valve 18 on the gas inlet pipeline 43 are closed. Biogas enters the first desulfurization tower 1 through the gas inlet pipeline 43, and is subjected to reverse mass transfer with circulating liquid sprayed by the first desulfurization tower spraying device 11 from bottom to top at the first desulfurization tower filling mechanism 12, wherein the retention time of the biogas in the first desulfurization tower is 50 s; the primarily desulfurized biogas enters the second desulfurization tower 2 through the series gas inlet pipeline 50, and is subjected to reverse mass transfer with circulating liquid sprayed by the second desulfurization tower spraying device 20 from bottom to top at the second desulfurization tower filling mechanism 21, and the retention time of the biogas in the second desulfurization tower is 50 s; the secondarily desulfurized biogas passes through a second gas outlet valve 27 and a second hydrogen sulfide monitor 28 and then enters a clean energy utilization device, and the concentration of hydrogen sulfide in the desulfurized biogas is lower than 50 ppm; when the liquid levels of the first desulfurization tower liquid collecting device 16 and the second desulfurization tower liquid collecting device 25 reach set values, respectively opening a first liquid collecting device drain valve 17 and a second liquid collecting device drain valve 26, and pumping the circulating liquid in the first desulfurization tower liquid collecting device 16 and the second desulfurization tower liquid collecting device 25 into a circulating liquid regeneration pool 3 for regeneration; when the liquid level of the circulating liquid regeneration tank 3 is too high or the index of the circulating liquid is unqualified, the drain valve 40 is opened, and part of circulating liquid slag liquid is discharged; when the liquid level of the circulating liquid regeneration tank 3 is too low or the index of the circulating liquid is unqualified, the kitchen waste leachate nitrifying liquid inlet valve 41 and the diluting and cooling water inlet valve 42 are opened, and the kitchen waste leachate nitrifying liquid and the diluting and cooling water are supplemented to be used as the circulating liquid.
Example 2
The utility model discloses be applied to marsh gas desulfurization system in certain kitchen garbage processing technology, this embodiment adopts parallelly connected operational mode, carries out the desulfurization with first desulfurizing tower 1 and second desulfurizing tower 2 parallelly connected to marsh gas, and parallelly connected operational mode is applicable to the big and marsh gas of marsh gas output hydrogen sulfide concentration condition lower relatively for improve desulfurization rate: in the parallel operation mode, the first desulfurization tower inert gas inlet valve 7, the second desulfurization tower inert gas inlet valve 8 and the series inlet valve 31 on the inlet duct 43 are closed. The biogas enters the first desulfurizing tower 1 and the second desulfurizing tower 2 through the gas inlet pipeline 43 respectively; in the first desulfurization tower 1, reverse mass transfer is generated between the methane and circulating liquid sprayed by a first desulfurization tower spraying device 11 from bottom to top at a first desulfurization tower filling mechanism 12, and the retention time of the methane is 50 s; in the second desulfurization tower 2, the methane and the circulating liquid sprayed by the second desulfurization tower spraying device 20 from bottom to top generate reverse mass transfer at a second desulfurization tower filling mechanism 21; the biogas desulfurized in the first desulfurizing tower 1 enters the clean energy utilization device after passing through a first gas outlet valve 18 and a first hydrogen sulfide monitor 19, and the biogas desulfurized in the second desulfurizing tower 2 enters the clean energy utilization device after passing through a second gas outlet valve 27 and a second hydrogen sulfide monitor 28; the concentration of hydrogen sulfide in the biogas is lower than 150 ppm after desulfurization is carried out by the first desulfurization tower 1 and the second desulfurization tower 2; when the liquid levels of the first desulfurization tower liquid collecting device 16 and the second desulfurization tower liquid collecting device 25 reach set values, respectively opening a first liquid collecting device drain valve 17 and a second liquid collecting device drain valve 26, and pumping the circulating liquid in the first desulfurization tower liquid collecting device 16 and the second desulfurization tower liquid collecting device 25 into a circulating liquid regeneration pool 3 for regeneration; when the liquid level of the circulating liquid regeneration tank 3 is too high or the index of the circulating liquid is unqualified, the drain valve 40 is opened, and part of circulating liquid slag liquid is discharged; when the liquid level of the circulating liquid regeneration tank 3 is too low or the index of the circulating liquid is unqualified, the kitchen waste leachate nitrifying liquid inlet valve 41 and the diluting and cooling water inlet valve 42 are opened, and the kitchen waste leachate nitrifying liquid and the diluting and cooling water are supplemented to be used as the circulating liquid.
Example 3
The utility model discloses be applied to marsh gas desulfurization system in certain kitchen garbage processing technology, this embodiment adopts the cleaning mode to wash the desulfurizing tower, and the cleaning mode is applied to the system and appears that marsh gas output is far less than air input, when purifying the hydrogen sulfide concentration in the back marsh gas not up to standard, desulfurizing tower inner wall and packing layer scale deposit problem, need wash the condition of desulfurizing tower: in the cleaning mode, the first desulfurization tower methane air inlet valve 5, the second desulfurization tower air inlet valve 8, the first desulfurization tower spray water inlet valve 30 and the series air inlet valve 31 are closed. The biogas enters the second desulfurizing tower 2 through the gas inlet pipeline 43 and the second desulfurizing tower biogas inlet valve 6 for desulfurization; the inert gas blower 4 blows inert gas into the first desulfurizing tower 1 through the inert gas inlet valve 7 of the first desulfurizing tower for exhausting residual methane in the tower body, so that the safety of personnel and equipment during cleaning, overhauling and maintaining is ensured; in a similar way, the first desulfurizing tower 1 can be kept running and the second desulfurizing tower 2 can be stopped running by controlling the valve to clean the two desulfurizing towers respectively.
The utility model has the advantages that:
1. the kitchen waste leachate nitrifying liquid contains a carbon source, a nitrogen source and a phosphorus source and is used as a main body of the circulating liquid, and other nutrient substances are not required to be added, so that the cost of the agent is greatly reduced;
2. the effluent of the kitchen waste leachate nitration liquid after aerobic treatment is in an aerobic condition, and the circulating liquid regeneration tank is low in aeration energy consumption and low in operation cost;
3. the kitchen waste leachate nitrifying liquid has various bacteria types and quantities, so that the rapid culture of the desulfurization bacteria is facilitated, and the culture time is 1-2 weeks;
4. the nitrifying liquid of the kitchen waste leachate is not required to be purchased and is convenient to obtain, and the treatment pressure of the kitchen waste leachate is reduced;
5. the problem of low primary biological desulfurization efficiency is solved by a series operation mode, the retention time of the biogas in the series mode is 80-200 s, the concentration of hydrogen sulfide in the purified biogas can be as low as 20 ppm, and the method is suitable for the condition of high concentration of hydrogen sulfide in the biogas;
6. the parallel operation mode can improve the desulfurization rate of the system, the retention time of the biogas in the parallel mode is 40-100 s, and the concentration of hydrogen sulfide in the purified biogas can be as low as 150 ppm, so that the method is suitable for the conditions of high biogas yield and relatively low concentration of hydrogen sulfide in the biogas;
7. in the cleaning mode, one desulfurizing tower continues to operate, the other desulfurizing tower is temporarily closed, and the desulfurizing towers can be cleaned, overhauled and maintained respectively without stopping the line;
8. the residual methane in the tower body is discharged by using inert gas, so that the safety of personnel and equipment during cleaning, overhauling and maintenance can be ensured;
9. the gas inlet pipeline of the desulfurizing tower is provided with an inert gas inlet branch pipe, and when a negative pressure phenomenon occurs in the desulfurizing tower, the inert gas can be introduced for stabilizing the pressure;
10. the method comprises the steps of automatically controlling the temperature of the desulfurizing tower, the liquid level of the liquid collecting device, the temperature of the circulating regeneration tank, the dissolved oxygen concentration, the liquid level and the pH value by an online monitoring control system, adjusting the operation mode of the biological desulfurizing system by controlling the on-off of each valve, and achieving high automation degree.
Claims (8)
1. A biogas biological desulfurization device for anaerobic fermentation of kitchen waste comprises a first desulfurization tower and a second desulfurization tower, wherein an air outlet pipeline, a spraying device, a filling mechanism, an air inlet pipeline and a liquid collecting device are sequentially and uniformly arranged in the first desulfurization tower and the second desulfurization tower from top to bottom; the method is characterized in that: the biogas enters the desulfurizing tower from the gas inlet pipeline and passes through the filling mechanism of the desulfurizing tower from bottom to top; circulating liquid sprayed out by the spraying device enters the filling mechanism to perform reverse mass transfer with the methane; the circulating liquid is kitchen waste leachate nitration liquid.
2. The biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste according to claim 1, characterized in that: the kitchen waste leachate treatment device also comprises a circulating liquid regeneration tank, wherein the circulating liquid regeneration tank comprises a kitchen waste leachate nitration liquid inlet and a submerged slag liquid pump; the circulating liquid regeneration tank provides circulating liquid for the spraying device through an under-liquid slag liquid pump; the circulating liquid regeneration pool is communicated with the liquid collecting device, so that circulating liquid in the liquid collecting device enters the circulating liquid regeneration pool.
3. The biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste according to claim 1, characterized in that: the kitchen waste leachate nitration liquid is effluent after the kitchen waste leachate is subjected to aerobic treatment.
4. The biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste according to claim 1, characterized in that: the top of the first desulfurizing tower is also provided with a series connection air inlet pipeline, and the series connection air inlet pipeline is connected with the air inlet pipeline of the second desulfurizing tower.
5. The biogas biological desulfurization apparatus for anaerobic fermentation of kitchen waste according to claim 2, characterized in that: and the circulating liquid regeneration tank is provided with a water inlet pipeline for diluting cooling water.
6. The biogas biological desulfurization apparatus for anaerobic fermentation of kitchen waste according to claim 2, characterized in that: and hydrogen sulfide monitors are arranged at the gas outlets of the first desulfurizing tower and the second desulfurizing tower.
7. The biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste according to claim 6, characterized in that: a thermometer and a heating device are arranged in the first desulfurizing tower and the second desulfurizing tower.
8. The biogas biological desulfurization equipment for anaerobic fermentation of kitchen waste according to claim 7, characterized in that: the system also comprises an online monitoring control system, wherein the online monitoring control system is connected with a pressure gauge and a safety valve on the air inlet pipeline; the online monitoring control system is connected with thermometers, heating devices, liquid level meters and hydrogen sulfide monitors in the first desulfurizing tower and the second desulfurizing tower; the on-line monitoring control system is connected with a thermometer, a dissolved oxygen monitoring device, a pH meter and a liquid level meter in the circulating liquid regeneration tank, and the on-line monitoring control system is connected with each valve.
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| CN111892964A (en) * | 2020-08-17 | 2020-11-06 | 温州嘉伟环保科技有限公司 | Biogas biological desulfurization equipment and method for anaerobic fermentation of kitchen waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111892964A (en) * | 2020-08-17 | 2020-11-06 | 温州嘉伟环保科技有限公司 | Biogas biological desulfurization equipment and method for anaerobic fermentation of kitchen waste |
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