CN218637008U - Forced circulation wet desulphurization device for methane desulphurization - Google Patents
Forced circulation wet desulphurization device for methane desulphurization Download PDFInfo
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- CN218637008U CN218637008U CN202223371254.3U CN202223371254U CN218637008U CN 218637008 U CN218637008 U CN 218637008U CN 202223371254 U CN202223371254 U CN 202223371254U CN 218637008 U CN218637008 U CN 218637008U
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- desulfurizer
- reaction tower
- pipe
- forced circulation
- isolation cylinder
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 111
- 238000006243 chemical reaction Methods 0.000 claims abstract description 90
- 238000002955 isolation Methods 0.000 claims abstract description 65
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 55
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 43
- 230000023556 desulfurization Effects 0.000 claims abstract description 43
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 239000002699 waste material Substances 0.000 claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003546 flue gas Substances 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 51
- 239000011593 sulfur Substances 0.000 claims description 42
- 229910052717 sulfur Inorganic materials 0.000 claims description 42
- 238000005273 aeration Methods 0.000 claims description 26
- 239000002002 slurry Substances 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 18
- 238000010992 reflux Methods 0.000 claims description 16
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 8
- 230000003009 desulfurizing effect Effects 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000005587 bubbling Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 16
- 230000009471 action Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 8
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910001447 ferric ion Inorganic materials 0.000 description 8
- 229910001448 ferrous ion Inorganic materials 0.000 description 8
- 239000005864 Sulphur Substances 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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Abstract
The utility model provides a forced circulation wet desulphurization device for biogas desulphurization, which comprises a reaction tower, an isolation cylinder and a desulfurizer circulating pump, wherein the top of the reaction tower is communicated with a waste air discharge pipe, a purified gas outlet pipe and a raw material gas input pipe, and the side part of the reaction tower is provided with an air input pipe used for conveying air into the desulfurizer; the isolation cylinder is arranged in a through manner along the up-down direction, the upper edge of the isolation cylinder is connected to the inner top wall of the reaction tower, the purified gas outlet pipe and the raw gas input pipe respectively extend downwards into the isolation cylinder, and the waste air discharge pipe is positioned outside the isolation cylinder; the desulfurizer circulating pump is communicated with the side part of the reaction tower through a first pipeline and communicated with the top part of the reaction tower through a second pipeline, and the outlet end of the second pipeline extends into the isolation cylinder. The utility model provides a forced circulation wet flue gas desulfurization device for marsh gas desulfurization can force the desulfurizer to circulate with higher speed through the desulfurizer circulating pump, makes hydrogen sulfide and desulfurizer fully contact, improves the reaction rate of hydrogen sulfide and desulfurizer.
Description
Technical Field
The utility model belongs to the technical field of hydrogen sulfide gas body handles, more specifically say, relate to a forced circulation wet flue gas desulfurization device for marsh gas desulfurization.
Background
The biogas contains a large amount of hydrogen sulfide gas, which is a toxic and harmful gas. The gas containing hydrogen sulphide must be desulphurised before being discharged into the atmosphere or to the next process stage. The existing desulfurization process can be divided into a dry desulfurization process and a wet desulfurization process, the wet desulfurization process at the present stage is mostly a complex iron wet desulfurization process, and the complex iron wet desulfurization process is a hydrogen sulfide removal process which directly oxidizes hydrogen sulfide into elemental sulfur in a liquid phase based on the complex iron principle and simultaneously recovers sulfur. In the process of oxidizing hydrogen sulfide into elemental sulfur, ferric ions in a catalyst (desulfurizer) are reduced into ferrous ions, the ferrous ions are regenerated into ferric ions under the action of air and recycled, and sulfur generated in the reaction process is separated through a plate filter press. Has the advantages of high hydrogen sulfide removal rate, strong anti-interference capability, simple operation, low cost, no generation of three wastes and the like.
The problems of low reaction rate and poor desulfurization effect of hydrogen sulfide caused by insufficient contact between hydrogen sulfide and a desulfurizer in the existing complex iron wet desulfurization process are solved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a forced circulation wet flue gas desulfurization device for marsh gas desulfurization can make hydrogen sulfide and desulfurizer fully contact, has improved the reaction rate of hydrogen sulfide and desulfurizer, has promoted the desulfurization effect of hydrogen sulfide.
In order to achieve the above object, the utility model adopts the following technical scheme: the forced circulation wet desulphurization device comprises a reaction tower, an isolation cylinder and a desulfurizer circulating pump, wherein the reaction tower is used for accommodating a desulfurizer, the top of the reaction tower is communicated with a waste air discharge pipe, a purified gas outlet pipe and a raw material gas input pipe, and the side part of the reaction tower is provided with an air input pipe used for conveying air into the desulfurizer; the isolation cylinder is arranged in a through manner along the up-down direction, the upper edge of the isolation cylinder is connected to the inner top wall of the reaction tower, the purified gas outlet pipe and the raw gas input pipe respectively extend downwards into the isolation cylinder, and the waste air discharge pipe is positioned outside the isolation cylinder; the desulfurizer circulating pump is communicated with the side part of the reaction tower through the first pipeline and is communicated with the top part of the reaction tower through the second pipeline, the outlet end of the second pipeline extends into the isolation cylinder, and the desulfurizer circulating pump is used for sucking the desulfurizer in the reaction tower and conveying the desulfurizer to the isolation cylinder.
In a possible implementation manner, the raw material gas input pipe is connected with a raw material gas generator for inputting hydrogen sulfide gas into the desulfurizer, the raw material gas generator comprises a raw material gas fan and a first dehydration tank connected with the raw material gas fan, and the output end of the raw material gas fan is connected with the raw material gas input pipe.
In some embodiments, the outlet end of the feed gas input pipe is provided with a bent pipe which is positioned below the liquid level of the desulfurizer and extends horizontally, and the bent pipe is provided with a bubbling opening with an upward opening.
In a possible implementation manner, the outlet end of the second pipeline is connected with a water spraying piece, and a plurality of water spraying pieces are arranged at intervals along the vertical direction.
In a possible implementation mode, the outlet end of the air input pipe is connected with an aeration pipe, the aeration pipe is wound around the periphery of the isolation cylinder along the circumferential direction of the isolation cylinder, and an aeration opening with an upward opening is formed in the aeration pipe.
In some embodiments, the aeration pipe is spirally wound from inside to outside on the periphery of the isolation cylinder by a plurality of circles.
In a possible realization mode, a sulfur separation component which is respectively communicated with the bottom and the top of the reaction tower is connected to the reaction tower and is used for separating sulfur and returning filtrate to the reaction tower.
In some embodiments, the sulfur separation assembly comprises a sulfur slurry pump, a plate filter press, a reflux buffer tank and a reflux pump which are connected in sequence, wherein the inlet end of the sulfur slurry pump is communicated with the bottom of the reaction tower, and the outlet end of the reflux pump is communicated with the top of the reaction tower.
In some embodiments, the outlet end of the sulfur slurry pump is also connected with a return pipe communicated with the reaction tower, and the return pipe is provided with a control valve.
In one possible implementation, the purified gas outlet pipe is connected with a second dehydration tank, and the air input pipe is connected with an aeration fan.
The embodiment of the application provides a forced circulation wet flue gas desulfurization device for marsh gas desulfurization, in its actual use, add the desulfurizer in the reaction tower in advance, make the liquid level of desulfurizer be higher than the lower extreme of isolation cylinder, rethread feed gas input tube lets in hydrogen sulfide gas to the desulfurizer in the isolation cylinder, let in the air in the desulfurizer to the reaction tower through the air input tube, the liquid level of desulfurizer is higher than the air input tube, hydrogen sulfide gas produces the bubble in letting in the desulfurizer and carries out contact reaction with the desulfurizer, hydrogen sulfide gas is by oxidation formation sulfur simple substance and purified gas, sulfur simple substance forms the bottom that the sulfur thick liquid deposits at the reaction tower under the action of gravity, and purified gas is carried to next process through the purified gas outlet duct. The desulfurizer circulating pump circulates all the time to extract the desulfurizer from the reaction tower and enables the desulfurizer to continuously flow downwards from the top of the isolation cylinder, so that purified gas is contacted with the desulfurizer again in the ascending process and purified again, so as to ensure the purification effect, and under the action of the desulfurizer circulating pump, the desulfurizer reacted with hydrogen sulfide gas in the isolation cylinder flows to the outer side of the isolation cylinder from the bottom of the isolation cylinder and is fully contacted with air, thereby realizing the forced accelerated circulation of the desulfurizer inside and outside the isolation cylinder. Under the condition that the desulfurizer flows at an accelerated speed, the contact reaction surface of the hydrogen sulfide gas and the desulfurizer is improved, even if the hydrogen sulfide is fully contacted with the desulfurizer, the reaction rate of the hydrogen sulfide and the desulfurizer is improved, and the desulfurization effect of the hydrogen sulfide is improved. After the desulfurizer reacts with the hydrogen sulfide gas, ferric ions in the desulfurizer are reduced into ferrous ions, and the ferrous ions are regenerated into ferric ions under the action of air, so that the desulfurizer in the isolation cylinder after reacting with the hydrogen sulfide gas reaches the outside of the isolation cylinder under the action of the desulfurizer circulating pump, fully contacts with the air and is conveyed back into the isolation cylinder, the reuse of the desulfurizer is realized, the redundant air is discharged from the waste air discharge pipe, and the desulfurization effect of the hydrogen sulfide is further improved. The isolation cylinder is used for isolating air and purified gas and preventing the purified gas from escaping from the waste air discharge pipe to the outside.
Compared with the prior art, the forced circulation wet desulphurization device for biogas desulphurization provided by the embodiment has the advantages that under the action of the desulfurizer circulating pump, the desulfurizer in the isolation cylinder after reacting with the hydrogen sulfide gas flows to the outer side of the isolation cylinder from the bottom of the isolation cylinder and fully contacts with air, so that forced accelerated circulation of the desulfurizer inside and outside the isolation cylinder is realized, and under the condition that the desulfurizer flows in an accelerated manner, the contact reaction surface of the hydrogen sulfide gas and the desulfurizer is improved, namely, the hydrogen sulfide gas and the desulfurizer are fully contacted, the reaction rate of the hydrogen sulfide and the desulfurizer is improved, and the desulphurization effect of the hydrogen sulfide is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic front view of a forced circulation wet desulfurization device for biogas desulfurization provided in an embodiment of the present invention;
fig. 2 is a schematic top view of the aerator pipe in fig. 1 according to the embodiment of the present invention;
fig. 3 is a schematic front view of the feed gas inlet pipe and the bending pipe in the embodiment of the present invention shown in fig. 1.
Wherein, in the figures, the respective reference numerals:
1. the liquid level of the desulfurizing agent; 10. a reaction tower; 11. a waste air discharge pipe; 12. a purified gas outlet pipe; 20. an isolation cylinder; 30. a raw material gas generator; 31. a first dewatering tank; 311. a feed gas input pipe; 312. bending the tube; 3121. a bubbling port; 32. a raw material gas fan; 40. an aeration fan; 41. an air input pipe; 42. an aeration pipe; 421. an air exposure port; 50. a second dehydration tank; 60. a sulfur separation assembly; 61. a plate filter press; 62. a reflux buffer tank; 63. a reflux pump; 64. a sulfur slurry pump; 70. a desulfurizer circulating pump; 71. a first pipeline; 72. a second pipeline; 73. a water spraying member; 80. a return pipe; 81. and (4) controlling the valve.
Detailed Description
In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 3, a forced circulation wet desulfurization apparatus for biogas desulfurization according to the present invention will now be described. The forced circulation wet desulphurization device for biogas desulphurization comprises a reaction tower 10, an isolation cylinder 20 and a desulfurizer circulating pump 70, wherein the reaction tower 10 is used for accommodating desulfurizer, the top of the reaction tower 10 is communicated with a waste air discharge pipe 11, a purified gas outlet pipe 12 and a raw gas input pipe 311, and the side part of the reaction tower is provided with an air input pipe 41 for conveying air into the desulfurizer; the isolation cylinder 20 is arranged in a through manner along the up-down direction, the upper edge of the isolation cylinder 20 is connected to the inner top wall of the reaction tower 10, the purified gas outlet pipe 12 and the raw gas input pipe 311 extend downwards into the isolation cylinder 20 respectively, the outlet end of the raw gas input pipe 311 is positioned below the liquid level of the desulfurizer, and the waste air discharge pipe 11 is positioned outside the isolation cylinder 20; the desulfurizer circulation pump 70 is communicated with the side of the reaction tower 10 through a first pipeline 71 and the top of the reaction tower 10 through a second pipeline 72, the outlet end of the second pipeline 72 extends into the isolation cylinder 20, and the desulfurizer circulation pump 70 is used for sucking the desulfurizer in the reaction tower 10 and conveying the desulfurizer to the isolation cylinder 20.
The embodiment of the application provides a forced circulation wet flue gas desulfurization device for marsh gas desulfurization, in its actual use, add the desulfurizer in reaction tower 10 in advance, make the liquid level of desulfurizer be higher than the lower extreme of isolation cylinder 20, rethread feed gas input tube 311 lets in hydrogen sulfide gas in to the desulfurizer in the isolation cylinder 20, let in the air through air input tube 41 in to the desulfurizer in reaction tower 10, the liquid level of desulfurizer is higher than air input tube 41, hydrogen sulfide gas lets in and produces the bubble in the desulfurizer and carry out contact reaction with the desulfurizer, hydrogen sulfide gas is oxidized and is generated sulphur simple substance and purified gas, sulphur simple substance forms sulphur thick liquid under the action of gravity and deposits in the bottom of reaction tower 10, and purified gas carries to next process through purified gas outlet pipe 12. In the process, the desulfurizer circulating pump 70 is always circulated to extract the desulfurizer from the reaction tower 10, and the desulfurizer continuously flows downwards from the top of the isolation cylinder 20, so that the purified gas is contacted with the desulfurizer again in the ascending process, and is purified again, so that the purification effect is ensured, and under the action of the desulfurizer circulating pump 70, the desulfurizer reacted with the hydrogen sulfide gas in the isolation cylinder 20 flows to the outer side of the isolation cylinder 20 from the bottom of the isolation cylinder 20 and is fully contacted with the air, so that the forced accelerated circulation of the desulfurizer inside and outside the isolation cylinder 20 is realized. Under the condition that the desulfurizer flows at an accelerated speed, the contact reaction surface of the hydrogen sulfide gas and the desulfurizer is improved, even if the hydrogen sulfide is fully contacted with the desulfurizer, the reaction rate of the hydrogen sulfide and the desulfurizer is improved, and the desulfurization effect of the hydrogen sulfide is improved. After the desulfurizer reacts with the hydrogen sulfide gas, ferric ions in the desulfurizer are reduced into ferrous ions, and the ferrous ions are regenerated into ferric ions under the action of air, so that the desulfurizer in the isolation cylinder 20 after reacting with the hydrogen sulfide gas reaches the outside of the isolation cylinder 20 under the action of the desulfurizer circulating pump 70, fully contacts with the air and is conveyed back into the isolation cylinder 20, the reuse of the desulfurizer is realized, and the redundant air is discharged from the waste air discharge pipe 11, so that the desulfurization effect of the hydrogen sulfide is further improved. The insulation cylinder 20 serves to insulate air and the purified gas from escaping from the exhaust air duct 11 to the outside.
Compared with the prior art, the forced circulation wet desulphurization device for biogas desulphurization provided by the embodiment has the advantages that under the action of the desulfurizer circulating pump 70, the desulfurizer which is reacted with the hydrogen sulfide gas in the isolation cylinder 20 flows to the outer side of the isolation cylinder 20 from the bottom of the isolation cylinder 20 and fully contacts with the air, so that forced accelerated circulation of the desulfurizer inside and outside the isolation cylinder 20 is realized, and under the condition that the desulfurizer flows in an accelerated manner, the contact reaction surface of the hydrogen sulfide gas and the desulfurizer is improved, namely, the hydrogen sulfide gas is fully contacted with the desulfurizer, the reaction rate of the hydrogen sulfide and the desulfurizer is improved, and the desulphurization effect of the hydrogen sulfide is improved.
In a possible implementation manner, the raw material gas input pipe 311 is configured as shown in fig. 1 and fig. 3, referring to fig. 1 and fig. 3, the raw material gas input pipe 311 is connected to a raw material gas generator 30 for inputting hydrogen sulfide gas into the desulfurizing agent, the raw material gas generator 30 includes a raw material gas blower 32 and a first dehydration tank 31 connected to the raw material gas blower 32, and an output end of the raw material gas blower 32 is connected to the raw material gas input pipe 311.
Specifically, the raw material gas enters the first dehydration tank 31 under the acceleration of the raw material gas fan 32, the liquid doped in the raw material gas is separated, the separated liquid is conveyed to the regeneration zone, the treated raw material gas enters the raw material gas fan 32, and is input into the raw material gas input pipe 311 through the raw material gas fan 32, and finally enters the isolation cylinder 20, and bubbles are generated in the desulfurizer to react with the desulfurizer, so that the raw material gas is ensured to be pure hydrogen sulfide gas, and the situation that other impurities enter the reaction tower 10 is avoided.
In some embodiments, the outlet end of the raw material gas input pipe 311 is provided with a bent pipe 312 which is located below the liquid level of the desulfurizing agent and extends horizontally, and the bent pipe 312 is provided with a bubbling port 3121 with an upward opening.
Specifically, the plurality of bubbling ports 3121 are axially disposed on the bent tube 312 at intervals, and are configured to disperse and release hydrogen sulfide gas into the desulfurizing agent, increase the contact area between the hydrogen sulfide gas and the desulfurizing agent, and improve the desulfurizing effect.
In a possible implementation manner, the second pipeline 72 is configured as shown in fig. 1, referring to fig. 1, the outlet end of the second pipeline 72 is connected with a water spraying member 73, and a plurality of water spraying members 73 are arranged at intervals along the up-down direction.
Specifically, water spray 73 includes that transition pipe and the interval that communicate with second pipeline 72 set up a plurality of shower nozzle on the transition pipe, and the transition pipe extends along the horizontal direction, and a plurality of shower nozzle sets up along the axial interval of transition pipe, and towards below, and the desulfurizer is spouted downwards simultaneously to a plurality of shower nozzles, has increased the area of contact of desulfurizer with the purge gas, has guaranteed the purifying effect of purge gas.
The plurality of water spraying members 73 are arranged at intervals in the vertical direction, so that the purification effect of purified gas is further improved.
In a possible implementation manner, the aeration pipe 42 is configured as shown in fig. 1 to 2, referring to fig. 1 to 2, an outlet end of the air input pipe 41 is connected with the aeration pipe 42, the aeration pipe 42 is arranged around the periphery of the insulation cylinder 20 along the circumferential direction of the insulation cylinder 20, and the aeration pipe 42 is provided with an aeration opening 421 with an upward opening.
Specifically, the aeration pipe 42 is arranged around the periphery of the lower part of the isolation cylinder 20, air is conveyed outside the isolation cylinder 20, under the action of the desulfurizer circulating pump 70, the desulfurizer which is reacted with the hydrogen sulfide gas in the isolation cylinder 20 flows to the outside of the isolation cylinder 20 from the inside of the isolation cylinder 20 and is fully contacted with the air, and ferrous ions generated after the reaction of the desulfurizer and the hydrogen sulfide gas are regenerated into ferric ions under the action of the air, so that the desulfurizer is reused, redundant air is discharged from the waste air discharge pipe 11, and the desulfurization effect of the hydrogen sulfide is further improved.
A plurality of aeration ports 421 are arranged at intervals in the circumferential direction of the aeration pipe 42, so that the contact area between the air and the desulfurizer is increased.
In some embodiments, the aeration tube 42 is helically wound around the outer circumference of the isolation tube 20 from inside to outside in several turns.
Specifically, the aeration pipe 42 is provided with a plurality of rings on the peripheral disc of the isolation cylinder 20, so as to further ensure the contact area between the air and the desulfurizer and further improve the efficiency of regenerating ferrous ions into ferric ions in the desulfurizer.
In a possible implementation manner, the reaction tower 10 adopts a structure as shown in fig. 1, and referring to fig. 1, a sulfur separation assembly 60 is connected to the reaction tower 10 and is respectively communicated with the bottom and the top of the reaction tower 10, and is used for separating sulfur and returning filtrate to the reaction tower 10.
Specifically, the sulfur separation assembly 60 guides the sulfur slurry at the bottom of the reaction tower 10 out, separates the sulfur, and conveys the generated filtrate (desulfurizer) back to the reaction tower 10, thereby avoiding the waste of the desulfurizer.
Optionally, the sulfur separation assembly 60 includes a sulfur slurry pump 64, a plate filter press 61, a reflux buffer tank 62 and a reflux pump 63, which are connected in sequence, wherein an inlet end of the sulfur slurry pump 64 is communicated with the bottom of the reaction tower 10, and an outlet end of the reflux pump 63 is communicated with the top of the reaction tower 10.
Optionally, the sulfur separation assembly 60 includes a sulfur slurry pump 64, a plate filter press 61, and a reflux pump 63 connected in sequence, an inlet end of the sulfur slurry pump 64 is communicated with the bottom of the reaction tower 10, and an outlet end of the reflux pump 63 is communicated with the top of the reaction tower 10.
In some embodiments, the sulfur separation assembly 60 comprises a sulfur slurry pump 64, a plate filter press 61, a reflux buffer tank 62 and a reflux pump 63 connected in sequence, wherein the inlet end of the sulfur slurry pump 64 is communicated with the bottom of the reaction tower 10, and the outlet end of the reflux pump 63 is communicated with the top of the reaction tower 10.
Specifically, the sulfur slurry pump 64 is communicated with the bottom of the reaction tower 10 through a slurry outlet pipe, the return pump 63 is communicated with the top of the reaction tower 10 through a liquid return pipe, the sulfur slurry pump 64 is used for extracting and conveying the sulfur slurry precipitated at the bottom of the reaction tower 10 to the plate filter press 61, sulfur is separated out through the plate filter press 61, filtrate (desulfurizer) is buffered through the return buffer tank 62, the impact force of the filtrate is reduced, the filtrate is collected and conveyed to the reaction tower 10 again under the action of the return pump 63, and waste liquid is avoided. Meanwhile, the sulfur separation component 60 can discharge the sulfur in the reaction tower 10 in time, so that the reduction of the reaction rate of the hydrogen sulfide and the desulfurizer caused by the suspension accumulation of the excessive sulfur is avoided.
Further, the reaction tower 10 gradually gathers inward from the top down. The lower part of reaction tower 10 is the back taper setting, can guarantee that the sulphur thick liquid can all get into sulphur separation subassembly 60 in, carries out the separation of sulphur, avoids the sulphur thick liquid to store up in reaction tower 10.
In some embodiments, the outlet end of the slurry pump 64 is further connected to a return pipe 80 communicated with the reaction tower 10, and the return pipe 80 is provided with a control valve 81.
Specifically, when the plate filter press 61 stops working or is damaged, the control valve 81 is opened, and the sulfur slurry pump 64 can convey the sulfur slurry back to the reaction tower 10 to avoid the leakage of the sulfur slurry.
In a possible implementation manner, the purified gas outlet pipe 12 adopts a structure as shown in fig. 1, and referring to fig. 1, the purified gas outlet pipe 12 is connected with a second dehydration tank 50, and the air input pipe 41 is connected with an aeration fan 40.
Specifically, the second dehydration tank 50 separates the liquid in the purified gas, conveys the separated gas to the regeneration area, and conveys the purified gas to the next process to ensure the purity of the purified gas.
The setting of the aeration fan 40 enhances the input power of the air into the reaction tower 10.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A forced circulation wet flue gas desulfurization device for marsh gas desulfurization, characterized by, includes:
the reaction tower is used for accommodating a desulfurizer, the top of the reaction tower is communicated with a waste air discharge pipe, a purified gas outlet pipe and a raw material gas input pipe, and the side part of the reaction tower is provided with an air input pipe used for conveying air into the desulfurizer;
the separation cylinder is arranged in a through mode in the vertical direction, the upper edge of the separation cylinder is connected to the inner top wall of the reaction tower, the purified gas outlet pipe and the raw material gas input pipe respectively extend downwards into the separation cylinder, and the waste air discharge pipe is positioned outside the separation cylinder; and
and the desulfurizer circulating pump is communicated with the side part of the reaction tower through a first pipeline and communicated with the top of the reaction tower through a second pipeline, the outlet end of the second pipeline extends into the isolation cylinder, and the desulfurizer circulating pump is used for sucking the desulfurizer in the reaction tower and conveying the desulfurizer to the isolation cylinder.
2. The forced circulation wet desulphurization device for biogas desulfurization according to claim 1, wherein the feed gas input pipe is connected with a feed gas generator for inputting hydrogen sulfide gas into the desulfurizer, the feed gas generator comprises a feed gas fan and a first dehydration tank connected with the feed gas fan, and the output end of the feed gas fan is connected with the feed gas input pipe.
3. The forced circulation wet desulfurization apparatus for biogas desulfurization according to claim 2, wherein the outlet end of the feed gas inlet pipe is provided with a bent pipe which is located below the liquid level of the desulfurizing agent and extends horizontally, and the bent pipe is provided with a bubbling port with an upward opening.
4. The forced circulation wet desulphurization device for biogas desulfurization according to claim 1, wherein the outlet end of the second pipeline is connected with a plurality of water spraying members, and the plurality of water spraying members are arranged at intervals along the vertical direction.
5. The forced circulation wet desulphurization device for biogas desulfurization according to claim 1, wherein the outlet end of the air input pipe is connected with an aeration pipe, the aeration pipe is arranged around the periphery of the isolation cylinder along the circumferential direction of the isolation cylinder, and the aeration pipe is provided with an aeration port with an upward opening.
6. The forced circulation wet desulfurization apparatus for biogas desulfurization according to claim 5, wherein the aeration pipe is spirally wound several times from inside to outside at the outer circumference of the separation cylinder.
7. The forced circulation wet desulfurization apparatus for biogas desulfurization according to claim 1, wherein a sulfur separation module is connected to the reaction tower and is respectively communicated with the bottom and the top of the reaction tower, for separating sulfur and returning filtrate to the reaction tower.
8. The forced circulation wet desulphurization device for biogas desulfurization according to claim 7, wherein the sulfur separation assembly comprises a sulfur slurry pump, a plate filter press, a reflux buffer tank and a reflux pump which are connected in sequence, the inlet end of the sulfur slurry pump is communicated with the bottom of the reaction tower, and the outlet end of the reflux pump is communicated with the top of the reaction tower.
9. The forced circulation wet desulphurization device for biogas desulfurization according to claim 8, wherein the outlet end of the slurry pump is further connected with a return pipe communicated with the reaction tower, and the return pipe is provided with a control valve.
10. The forced circulation wet desulfurization apparatus for biogas desulfurization as set forth in claim 1, wherein a second dehydration tank is connected to said purified gas outlet pipe, and an aeration fan is connected to said air inlet pipe.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117654256A (en) * | 2024-01-31 | 2024-03-08 | 四川凌耘建科技有限公司 | Normal pressure acid gas desulfurization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117654256A (en) * | 2024-01-31 | 2024-03-08 | 四川凌耘建科技有限公司 | Normal pressure acid gas desulfurization device |
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