CN214437835U - Device for improving biological desulfurization efficiency and desulfurization stability of alkaline biogas - Google Patents
Device for improving biological desulfurization efficiency and desulfurization stability of alkaline biogas Download PDFInfo
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- CN214437835U CN214437835U CN202120638528.7U CN202120638528U CN214437835U CN 214437835 U CN214437835 U CN 214437835U CN 202120638528 U CN202120638528 U CN 202120638528U CN 214437835 U CN214437835 U CN 214437835U
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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
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Abstract
The utility model relates to a desulphurization unit field discloses a improve device of biological desulfurization efficiency of alkali process marsh gas and desulfurization stability, including alkali wash desulfurizing tower and regeneration cycle structure, regeneration cycle structure includes tower discharge pump, heat exchanger, the regeneration tank, absorption liquid circulating pump and cooling heat exchanger, alkali wash desulfurizing tower is equipped with the interior shower pipeline of tower, the filler section, filler grid and tower bottom segment, alkali wash desulfurizing tower is equipped with marsh gas export and marsh gas import, the tower bottom segment passes through the tower discharge pump and is connected with heat exchanger, heat exchanger is connected with tower discharge pump, heat exchanger is connected with the regeneration tank, the regeneration tank is connected with cooling heat exchanger, cooling heat exchanger is connected with the absorption liquid circulating pump. The utility model provides the high solubility of hydrogen sulfide gas in the absorption liquid has improved desulfurization efficiency, under the prerequisite of guaranteeing desulfurization efficiency, can reduce the absorption liquid circulation volume, and the lowering system cost can avoid hanging the membrane in the microorganism tower simultaneously and cause the desulfurizing tower to block up for process systems is more stable.
Description
Technical Field
The utility model relates to a desulphurization unit field specifically relates to a improve device of biological desulfurization efficiency of alkaline process marsh gas and desulfurization stability.
Background
The biogas is a combustible gas and mainly comprises components such as methane, carbon dioxide, a small amount of hydrogen sulfide, ammonia gas and the like, the biogas contains a small amount of hydrogen sulfide gas, the biogas containing the hydrogen sulfide can generate sulfur dioxide gas after combustion, the sulfur dioxide gas is a main factor formed by acid rain, the desulfurization treatment is required in the domestic coal-fired boiler, gas-fired boiler and chemical production process at present, the domestic environmental protection marking is stipulated, when the biogas is used as an energy source, the concentration of the hydrogen sulfide in the biogas cannot exceed 20mg/m3, the content of the hydrogen sulfide in the biogas is far higher than the stipulated at present, and therefore, the removal of the hydrogen sulfide in the biogas is an indispensable pretreatment link in the use process of the biogas. The biogas biological desulfurization technology is widely applied to anaerobic fermentation biogas engineering, and is a desulfurization method for converting sulfide into elemental sulfur or sulfate by utilizing desulfurization bacteria under normal temperature and pressure, the biological desulfurization method can be divided into acid biological desulfurization and alkali biological desulfurization according to the difference of pH values of absorption liquid, for the alkali biological desulfurization of biogas, in order to maintain the survival activity of strains, the temperature of the absorption liquid cannot be lower than 30 ℃, and the pH value is kept at about 7-8, so that the efficiency of removing acidic hydrogen sulfide by neutral absorption liquid is lower at the temperature, if the desulfurization efficiency is required to be ensured, the circulating spraying amount of the absorption liquid is inevitably required to be increased, the circulating time of a regeneration system is shortened, the regeneration efficiency is directly insufficient or the volume of the regeneration system is excessively large, the integral operation cost and the system stability are influenced, and simultaneously, the desulfurization bacteria are beneficial to the growth and film formation of the desulfurization tower in a filler structure at a proper temperature, this can result in increased drag and even plugging of the desulfurization tower.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device for improving the biological desulfurization efficiency and the desulfurization stability of alkaline process marsh gas, thereby solving the problems in the prior art.
A device for improving the biological desulfurization efficiency and the desulfurization stability of alkaline process biogas comprises an alkaline washing desulfurization tower and a regeneration circulation structure, wherein the regeneration circulation structure comprises a tower discharge pump (7), a heating heat exchanger (8), a regeneration tank (9), an absorption liquid circulation pump (10) and a cooling heat exchanger (11), an in-tower spraying pipeline (2), a filler section (3), a filler grating (4) and a tower bottom section internally provided with tower bottom absorption liquid are sequentially arranged in the alkaline washing desulfurization tower from top to bottom, a biogas outlet (1) is arranged at the top of the alkaline washing desulfurization tower, a biogas inlet (5) is arranged at the side part of the alkaline washing desulfurization tower, the tower bottom section is connected with the heating heat exchanger (8) through the tower discharge pump (7), one end of the heating heat exchanger (8) is connected with the tower discharge pump (7), the other end of the heating heat exchanger (8) is connected with the regeneration tank (9), the regeneration tank (9) is connected with the cooling heat exchanger (11) through the absorption liquid circulation pump (10), one end of the cooling heat exchanger (11) is connected with the absorption liquid circulating pump (10), and the other end of the cooling heat exchanger (11) is connected with the spray pipeline (2) in the tower through a pipeline.
Furthermore, the installation position of the methane inlet (5) is positioned between the bottom surface of the packing grid (4) and the liquid level of the tower bottom absorption liquid in the tower bottom section.
Furthermore, the tower bottom section is provided with a tower bottom absorption liquid outlet, the installation position of the tower bottom absorption liquid outlet is lower than the liquid level of the tower bottom absorption liquid in the tower bottom section, and the tower bottom section is connected with the tower discharge pump (7) through the tower bottom absorption liquid outlet.
Furthermore, the cooling heat exchanger (11) is connected with a water chilling unit (12).
Further, the tower bottom section is provided with a liquid supplementing port, and the liquid supplementing port is used for supplementing tower bottom absorption liquid to the tower bottom section.
The utility model discloses reduce desulfurizing tower inner loop liquid temperature, improved the solubility of hydrogen sulfide gas in the absorption liquid, the bacterial in the circulation liquid can not influence the activity of bacterial by a wide margin under the low temperature state of desulfurizing tower short time, temperature reduction is favorable to the absorption process, improve desulfurization efficiency, under the prerequisite of guaranteeing desulfurization efficiency, can reduce the absorption liquid circulation volume, the lowering system cost, the hanging membrane causes the desulfurizing tower to block up in can avoiding the microbial tower simultaneously, make process systems more stable.
The utility model has the advantages that: the utility model overcomes the defects of the prior alkaline biological desulfurization technology, adds a condensation heat exchange device in the circulating pipeline, reduces the temperature of the circulating liquid in the desulfurizing tower, and improves the absorption efficiency. The utility model discloses effectively reduce the circulation volume of absorption liquid, because the volume and the circulation volume of regeneration tank are directly proportional, the reduction of circulation liquid has also reduced the volume of regeneration tank. In addition, because the reduction of the temperature of the circulating liquid in the alkaline washing desulfurizing tower, the condition that the desulfurizing bacteria proliferate in the tower is destroyed, the utility model discloses can avoid the biomembrane hanging to lead to the tower blockage for the operation of regeneration system technology is more stable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for improving the biological desulfurization efficiency and desulfurization stability of alkaline biogas provided in this embodiment.
1. The system comprises a biogas outlet, 2 spray pipelines in the tower, 3 packing sections, 4 packing grids, 5 biogas inlets, 6 tower bottom sections, 7 tower discharge pumps, 8 heating heat exchangers, 9 regeneration tanks, 10 absorption liquid circulating pumps, 11 cooling heat exchangers, 12 and a water chilling unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only. It is noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of the present invention and the above-described drawings are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Embodiment one, a device for improving biological desulfurization efficiency and desulfurization stability of alkaline process biogas, as shown in fig. 1, comprises an alkaline washing desulfurization tower and a regeneration circulation structure, wherein the regeneration circulation structure comprises a tower discharge pump 7, a heating heat exchanger 8, a regeneration tank 9, an absorption liquid circulation pump 10 and a cooling heat exchanger 11, an internal spray pipeline 2, a filler section 3, a filler grid 4 and a tower bottom section 6 with a tower bottom absorption liquid arranged therein are sequentially arranged in the alkaline washing desulfurization tower from top to bottom, a biogas outlet 1 is arranged at the top of the alkaline washing desulfurization tower, a biogas inlet 5 is arranged at the side part of the alkaline washing desulfurization tower, the tower bottom section is connected with the heating heat exchanger 8 through the tower discharge pump 7, one end of the heating heat exchanger 8 is connected with the tower discharge pump 7, the other end of the heating heat exchanger 8 is connected with the regeneration tank 9, the regeneration tank 9 is connected with a cooling heat exchanger 11 through the absorption liquid circulation pump 10, one end of the cooling heat exchanger 11 is connected with the absorption liquid circulation pump 10, the other end of the cooling heat exchanger 11 is connected with the spray pipeline 2 in the tower through a pipeline.
The installation position of the methane inlet 5 is positioned between the bottom surface of the packing grid 4 and the liquid level of the tower bottom absorption liquid in the tower bottom section. The tower bottom section is provided with a tower bottom absorption liquid outlet, the installation position of the tower bottom absorption liquid outlet is lower than the liquid level of the tower bottom absorption liquid in the tower bottom section, and the tower bottom section is connected with a tower discharge pump 7 through the tower bottom absorption liquid outlet. The cooling heat exchanger 11 is connected with a water chilling unit 12. The tower bottom section 6 is provided with a liquid supplementing port which is used for supplementing tower bottom absorption liquid to the tower bottom section.
Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:
the utility model overcomes the defects of the prior alkaline biological desulfurization technology, adds a condensation heat exchange device in the circulating pipeline, reduces the temperature of the circulating liquid in the desulfurizing tower and improves the absorption efficiency. The improved alkaline process biogas biological desulfurization device achieves the aim that the operating temperature in the desulfurization tower is reduced to 10 ℃ and the temperature of the regeneration tank maintains the active temperature of biological strains by heating heat exchange and cooling heat exchange devices on the premise of ensuring the original process route. Compare and be 30 ℃ in the absorption liquid temperature, the solubility of hydrogen sulfide in the absorption liquid greatly improves and the bacterial in the circulating liquid can not influence the activity of bacterial by a wide margin under the low temperature state of desulfurizing tower short time when 10 ℃, and the absorption efficiency of absorption liquid is nevertheless promoted, consequently under the condition of the treatment effeciency of guaranteeing the absorption tower, the utility model discloses can effectively reduce the circulation volume of absorption liquid, because the volume of regeneration tank is directly proportional with the circulation volume, the reduction of circulating liquid also reduces the volume of regeneration tank. In addition, as the temperature of the circulating liquid in the desulfurizing tower is reduced, the condition that the desulfurizing bacteria proliferate in the tower is damaged, and the condition that the regeneration system process is more stable due to tower blockage caused by biofilm formation is avoided.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (5)
1. The device for improving the biological desulfurization efficiency and the desulfurization stability of the alkaline process biogas is characterized by comprising an alkaline washing desulfurization tower and a regeneration circulation structure, wherein the regeneration circulation structure comprises a tower discharge pump (7), a heating heat exchanger (8), a regeneration tank (9), an absorption liquid circulating pump (10) and a cooling heat exchanger (11), an in-tower spraying pipeline (2), a filler section (3), a filler grid (4) and a tower bottom section internally provided with tower bottom absorption liquid are sequentially arranged in the alkaline washing desulfurization tower from top to bottom, a biogas outlet (1) is formed in the top of the alkaline washing desulfurization tower, a biogas inlet (5) is formed in the side part of the alkaline washing desulfurization tower, the tower bottom section is connected with the heating heat exchanger (8) through the tower discharge pump (7), one end of the heating heat exchanger (8) is connected with the tower discharge pump (7), and the other end of the heating heat exchanger (8) is connected with the regeneration tank (9), the regeneration tank (9) is connected with the cooling heat exchanger (11) through the absorption liquid circulating pump (10), one end of the cooling heat exchanger (11) is connected with the absorption liquid circulating pump (10), and the other end of the cooling heat exchanger (11) is connected with the spray pipeline (2) in the tower through a pipeline.
2. The device for improving the biological desulfurization efficiency and desulfurization stability of alkaline process biogas according to claim 1, wherein the biogas inlet (5) is installed between the bottom surface of the packing grid (4) and the liquid level of the tower bottom absorption liquid in the tower bottom section.
3. The apparatus for improving the biological desulfurization efficiency and desulfurization stability of alkaline biogas according to claim 1, wherein the tower bottom section is provided with a tower bottom absorption liquid discharge port, the installation position of the tower bottom absorption liquid discharge port is lower than the liquid level of the tower bottom absorption liquid in the tower bottom section, and the tower bottom section is connected with the tower discharge pump (7) through the tower bottom absorption liquid discharge port.
4. The device for improving the biological desulfurization efficiency and desulfurization stability of alkaline process biogas according to claim 1, characterized in that the cooling heat exchanger (11) is connected with a water chilling unit (12).
5. The device for improving the biological desulfurization efficiency and desulfurization stability of alkaline biogas according to claim 1, wherein the tower bottom section is provided with a liquid supplementing port, and the liquid supplementing port is used for supplementing the tower bottom absorption liquid into the tower bottom section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120638528.7U CN214437835U (en) | 2021-03-29 | 2021-03-29 | Device for improving biological desulfurization efficiency and desulfurization stability of alkaline biogas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120638528.7U CN214437835U (en) | 2021-03-29 | 2021-03-29 | Device for improving biological desulfurization efficiency and desulfurization stability of alkaline biogas |
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| Publication Number | Publication Date |
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| CN214437835U true CN214437835U (en) | 2021-10-22 |
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| CN202120638528.7U Active CN214437835U (en) | 2021-03-29 | 2021-03-29 | Device for improving biological desulfurization efficiency and desulfurization stability of alkaline biogas |
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2021
- 2021-03-29 CN CN202120638528.7U patent/CN214437835U/en active Active
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