CN219010228U - Biogas purification system for submerged combustion evaporation - Google Patents
Biogas purification system for submerged combustion evaporation Download PDFInfo
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- CN219010228U CN219010228U CN202222790988.9U CN202222790988U CN219010228U CN 219010228 U CN219010228 U CN 219010228U CN 202222790988 U CN202222790988 U CN 202222790988U CN 219010228 U CN219010228 U CN 219010228U
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Abstract
The utility model discloses a biogas purification system for submerged combustion evaporation, which comprises a biogas purification treatment unit and a desulfurizing agent regeneration circulation unit; the main equipment of the biogas purifying treatment unit is a desulfurizing tower, one side of the desulfurizing tower is provided with a biogas inlet, the top of the desulfurizing tower is provided with a biogas outlet, and the biogas outlet is steamed by submerged combustion through a pipe bodyThe top of the hair generator is communicated; when the utility model is used, methane generated by medium-temperature anaerobic reaction flows into the desulfurizing tower through the pipeline, the methane carries out gas-liquid phase contact reaction in the water collecting tank in the desulfurizing tower, and H 2 S is absorbed into water solution firstly and then is absorbed by Fe 3 + oxidizing into elemental sulfur, wherein a sprayer and a demister are arranged in the desulfurizing tower so as to ensure that gas and liquid are fully contacted and ensure H 2 S removal efficiency reaches the standard, after the reaction in the water collecting tank is completed, the water enters the regeneration tank through the rich liquor pump, and the aeration device in the regeneration tank utilizes O in the air 2 Is Fe with the oxidizing property of Fe 2 +reduction to Fe 3 +。
Description
Technical Field
The utility model relates to the technical field of environmental engineering, in particular to a methane purification system for submerged combustion evaporation.
Background
Along with the continuous increase of the treatment capacity of the household garbage, the total amount of garbage leachate is also continuously increased. Submerged combustion evaporation technology as a treatment process for leachate concentrates is also increasingly used. The submerged combustion evaporation technology uses marsh gas as a heat source, the marsh gas is sourced from a medium-temperature anaerobic system, and the marsh gas is required to be desulfurized and purified by a purification system SO as to avoid SO (sulfur dioxide) generated by combustion 2 Sulfuric acid and sulfurous acid are formed in the evaporator to corrode equipment, while avoiding a decrease in the pH in the evaporator.
However, existing H 2 S purification technology has certain problems;
1. h 2 The S purification technology is divided into biological desulfurization, dry desulfurization and wet desulfurization according to methods, wherein the biological desulfurization is mainly applied to H in the gas refining and the gas outlet of a Claus device 2 S removal is also applied to H in industrial waste gas 2 S is removed, but is not used for waste gas with lower concentration, and the reaction time is longer.
2. In the iron oxide method of the adsorption method on the dry desulfurization, the sulfur capacity of the iron oxide absorbent is generally 60%. The zinc oxide method in the adsorption method is only suitable for low-concentration H 2 S is purified, the desulfurizing agent can not be oxidized and regenerated, and the operation cost is high. In the manganese ore method of the adsorption method, the desulfurizing agent cannot be regenerated. The Claus method of dry oxidation has limitations on the treatment capacity and conditions, and the conversion rate of elemental sulfur can only reach 94% -97%, so that the desulfurization efficiency of dry desulfurization is low.
3. Methanol in wet desulfurization, methanol desulfurization is toxic and absorbs H 2 S has harsh conditions, so the requirement on equipment is high, and the operation cost is high. The sulfone amine method uses alcohol amine absorbent which is expensive, and the hot carbonate method has heat K 2 CO 3 The solution has the defects of serious corrosion to equipment, high operation energy consumption and the like. The iron-based process has the technical defect of low gas-liquid mass transfer efficiency, and has the advantages of degradation, byproduct accumulation and Fe 2+ Slow regeneration and sulfur blockage.
Disclosure of Invention
The utility model aims to provide a methane purification system for submerged combustion evaporation, which is used for solving the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a biogas purification system for submerged combustion evaporation comprises a biogas purification treatment unit and a desulfurizing agent regeneration circulation unit;
the main equipment of the biogas purification treatment unit is a desulfurizing tower, one side of the desulfurizing tower is provided with a biogas inlet, the top of the desulfurizing tower is provided with a biogas outlet, and the biogas outlet is communicated with the top of the submerged combustion evaporator through a pipe body;
the desulfurizing agent regeneration circulation unit comprises a regeneration tank and a sedimentation tank, sedimentation tanks are arranged at the bottoms of the regeneration tank and the sedimentation tank, the sedimentation tanks are communicated with a plate-and-frame filter press through a filter pressing feeding pump, an outlet of the plate-and-frame filter press is communicated with a buffer tank through a pipe body, and the buffer tank is communicated with the sedimentation tank through a filter pressing reflux pump;
the bottom of the desulfurizing tower is communicated with the regeneration tank through a pipe body, and one side of the precipitation tank is communicated with the desulfurizing tower through a pipe body.
Preferably, a liquid-rich pump is arranged on a pipe body, wherein the pipe body is communicated with the regeneration tank, of the desulfurizing tower.
Preferably, a lean liquid pump is arranged on a pipe body, wherein the pipe body is communicated with the desulfurizing tower, of the settling tank.
Preferably, the internal size of the precipitation tank is consistent with the internal size of the regeneration tank.
Preferably, a water collecting tank, a sprayer and a demister are arranged in the desulfurization tower.
Preferably, an aeration device is arranged in the regeneration tank.
Compared with the prior art, the utility model has the beneficial effects that:
1. when the utility model is used, the marsh gas carries out gas-liquid phase contact reaction in the water collecting tank in the desulfurizing tower, H 2 S is absorbed into water solution firstly and then is absorbed by Fe 3+ Oxidizing into elemental sulfur, wherein a sprayer and a demister are arranged in the desulfurizing tower so as to ensure that gas and liquid are fully contacted and ensure H 2 S removal efficiency reaches the standard, so that the desulfurization efficiency is high, and H with different concentrations can be treated 2 S is desulfurized, and the desulfurization product is elemental sulfur, so that the method is environment-friendly and nontoxic;
2. in the utility model, after the reaction in the water collecting tank is completed, the water enters the regeneration tank through the rich liquor pump, and the aeration device in the regeneration tank utilizes O in the air 2 Is Fe with the oxidizing property of Fe 2+ Reduction to Fe 3+ . The sulfur slurry stays in the regeneration tank to ensure the complete reduction and regeneration reaction, and the complex iron desulfurizing agent has high sulfur capacity, so that the utility model has strong wave resistance and stable desulfurizing effect, and can treat H in the inlet air 2 The fluctuation of S content is large, and H 2 The S removal rate can reach 99% or more;
3. in the utility model, the generated elemental sulfur is collected in the sedimentation tank, sulfur mud in the sedimentation tank is dehydrated and recovered or treated by a plate-and-frame filter press, the separated liquid flows back to the sedimentation tank and is pumped back to the desulfurizing tower by a lean solution pump for repeated use, so that the operation cost of the utility model is low, the desulfurizing agent can be recycled, and only a small amount of desulfurizing agent can be lost along with sulfur cakes or is lost due to side reaction, so that only a small amount of desulfurizing agent is needed to be supplemented.
Drawings
FIG. 1 is a schematic diagram of the structure of the submerged combustion evaporative biogas purification system of the present utility model.
In the figure: 1. submerged combustion evaporator; 2. a desulfurizing tower; 3. a rich liquid pump; 4. a sedimentation tank; 5. a regeneration tank; 6. a precipitation tank; 7. a lean liquid pump; 8. a filter pressing reflux pump; 9. a plate and frame filter press; 10. a filter pressing feed pump; 11. a buffer tank; 12. an aeration device.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, an embodiment of the present utility model provides a biogas purification system for submerged combustion vaporization, comprising: a biogas purifying treatment unit and a desulfurizing agent regeneration circulation unit.
Wherein the main equipment of the biogas purification treatment unit is a desulfurizing tower 2, one side of the desulfurizing tower 2 is provided with a biogas inlet, the top of the desulfurizing tower 2 is provided with a biogas outlet, the biogas outlet is communicated with the top of the submerged combustion evaporator 1 through a pipe body, when in use, biogas generated by medium-temperature anaerobic flows into the desulfurizing tower 2 through the pipe, the biogas performs gas-liquid phase contact reaction in a water collecting tank in the desulfurizing tower 2, and H 2 S is absorbed into water solution firstly and then is absorbed by Fe 3+ Oxidizing into elemental sulfur, wherein a water collecting tank, a sprayer and a demister are arranged in the desulfurizing tower 2 so as to ensure that gas and liquid are fully contacted and H is ensured 2 S removal efficiency reaches the standard, so that the desulfurization efficiency is high, and H with different concentrations can be treated 2 S, desulfurization is carried out.
The desulfurizing agent regeneration circulation unit comprises a regeneration tank 5 and a sedimentation tank 6, sedimentation tanks 4 are arranged at the bottoms of the regeneration tank 5 and the sedimentation tank 6, the sedimentation tanks 4 are communicated with a plate-and-frame filter press 9 through a filter pressing feeding pump 10, the outlet of the plate-and-frame filter press 9 is communicated with a buffer tank 11 through a pipe body, and the buffer tank 11 is communicated with the sedimentation tank 6 through a filter pressing reflux pump 8; the bottom of the desulfurizing tower 2 is communicated with the regeneration tank 5 through a pipe body, one side of the precipitation tank 6 is communicated with the desulfurizing tower 2 through a pipe body, wherein a rich liquid pump 3 is arranged on the pipe body, which is communicated with the regeneration tank 5, when the desulfurizing tower is used, after the reaction in the water collecting tank is completed, the rich liquid pump 3 enters the regeneration tank 5, sulfur slurry stays in the regeneration tank 5 to ensure the complete reduction and regeneration reaction, a circulation port is arranged between the regeneration tank 5 and the precipitation tank 6, no aeration equipment is arranged in the precipitation tank 6, the size is the same as that of the regeneration tank 5, the generated elemental sulfur is collected in the precipitation tank 4, sulfur mud in the precipitation tank 4 is dehydrated and recovered or treated through a plate-and-frame filter press 9, and the separated liquid flows back to the precipitation tank 6 and returns to the desulfurizing tower 2 through a lean liquid pump 7 for recycling.
Wherein, a lean liquid pump 7 is arranged on a pipe body of the precipitation tank 6 communicated with the desulfurizing tower 2, and the lean liquid pump 7 can lead the liquid with lower content of hydrogen sulfide into the desulfurizing tower 2, so that the desulfurizing agent can be recycled; in this embodiment, the size of the interior of the precipitation tank 6 is the same as that of the interior of the regeneration tank 5, and the aeration device 12 is installed in the regeneration tank 5, and the aeration device 12 in the regeneration tank 5 can utilize O in the air 2 Is Fe with the oxidizing property of Fe 2+ Reduction to Fe 3+ 。
According to the technical scheme, the working steps of the scheme are summarized and carded: when in use, the marsh gas carries out gas-liquid phase contact reaction in the water collecting tank in the desulfurizing tower 2, H 2 S is absorbed into water solution firstly and then is absorbed by Fe 3+ Oxidizing into elemental sulfur, wherein a sprayer and a demister are arranged in the desulfurizing tower 2 so as to ensure that gas and liquid are fully contacted and ensure H 2 S removal efficiency reaches the standard, so that the desulfurization efficiency is high, and H with different concentrations can be treated 2 S is desulfurized, and the desulfurization product is elemental sulfur, so that the method is environment-friendly and nontoxic;
after the reaction in the water collecting tank is completed, the water enters the regeneration tank 5 through the rich liquor pump 3, and the aeration device 12 in the regeneration tank 5 utilizes O in the air 2 Is Fe with the oxidizing property of Fe 2+ Reduction to Fe 3+ . The sulfur slurry stays in the regeneration tank 5 to ensure the complete reduction and regeneration reaction, and the complex iron desulfurizing agent has high sulfur capacity, so that the utility model has strong wave resistance and stable desulfurizing effect, and can treat H in the inlet air 2 The fluctuation of S content is large, and H 2 The S removal rate can reach 99% or more; the regeneration tank 5 and the sedimentation tank 6 are provided with a circulation port in the middle, no aeration equipment is arranged in the sedimentation tank 6, the size of the generated elemental sulfur is the same as that of the regeneration tank 5, the generated elemental sulfur is collected in the sedimentation tank 4, sulfur mud in the sedimentation tank 4 is dehydrated and recovered or treated by a plate-and-frame filter press 9, the separated liquid flows back to the sedimentation tank 6 and returns to the desulfurization tower 2 for recycling by a barren liquor pump 7, so that the sulfur mud in the sedimentation tank 4 is transported and recoveredThe running cost is low, the desulfurizing agent can be recycled, and only a small amount of desulfurizing agent can be lost along with sulfur cakes or is lost due to side reaction, so that only a small amount of desulfurizing agent is needed to be supplemented.
None of the utility models are related to the same or are capable of being practiced in the prior art. Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a be used for submergence burning evaporation marsh gas clean system, includes marsh gas purification treatment unit and desulfurizer regeneration circulation unit, its characterized in that:
the biogas purification treatment unit comprises a submerged combustion evaporator (1) and a desulfurizing tower (2), wherein a biogas inlet is formed in one side of the desulfurizing tower (2), a biogas outlet is formed in the top of the desulfurizing tower (2), and the biogas outlet is communicated with the top of the submerged combustion evaporator (1) through a pipe body;
the desulfurizing agent regeneration circulation unit comprises a regeneration tank (5) and a precipitation tank (6), wherein the bottoms of the regeneration tank (5) and the precipitation tank (6) are respectively provided with a precipitation tank (4), the precipitation tanks (4) are communicated with a plate-and-frame filter press (9) through a filter pressing feeding pump (10), the outlets of the plate-and-frame filter press (9) are communicated with a buffer tank (11) through a pipe body, and the buffer tank (11) is communicated with the precipitation tank (6) through a filter pressing reflux pump (8);
the bottom of the desulfurizing tower (2) is communicated with the regeneration tank (5) through a pipe body, and one side of the sedimentation tank (6) is communicated with the desulfurizing tower (2) through a pipe body.
2. A system for submerged combustion evaporative biogas purification as claimed in claim 1, wherein: and a liquid-rich pump (3) is arranged on a pipe body, which is communicated with the regeneration tank (5), of the desulfurizing tower (2).
3. A system for submerged combustion evaporative biogas purification as claimed in claim 1, wherein: the sedimentation tank (6) is provided with a lean liquid pump (7) on a pipe body communicated with the desulfurizing tower (2).
4. A system for submerged combustion evaporative biogas purification as claimed in claim 1, wherein: the internal size of the sedimentation tank (6) is consistent with that of the regeneration tank (5).
5. A system for submerged combustion evaporative biogas purification as claimed in claim 1, wherein: a water collecting tank, a sprayer and a foam remover are arranged in the desulfurizing tower (2).
6. A system for submerged combustion evaporative biogas purification as claimed in claim 1, wherein: an aeration device (12) is arranged in the regeneration tank (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222790988.9U CN219010228U (en) | 2022-10-24 | 2022-10-24 | Biogas purification system for submerged combustion evaporation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222790988.9U CN219010228U (en) | 2022-10-24 | 2022-10-24 | Biogas purification system for submerged combustion evaporation |
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| CN219010228U true CN219010228U (en) | 2023-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222790988.9U Active CN219010228U (en) | 2022-10-24 | 2022-10-24 | Biogas purification system for submerged combustion evaporation |
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