CN117654256A - Normal pressure acid gas desulfurization device - Google Patents
Normal pressure acid gas desulfurization device Download PDFInfo
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- CN117654256A CN117654256A CN202410131116.2A CN202410131116A CN117654256A CN 117654256 A CN117654256 A CN 117654256A CN 202410131116 A CN202410131116 A CN 202410131116A CN 117654256 A CN117654256 A CN 117654256A
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- 239000002253 acid Substances 0.000 title claims abstract description 87
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 56
- 230000023556 desulfurization Effects 0.000 title claims abstract description 56
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000009826 distribution Methods 0.000 claims abstract description 54
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 46
- 239000011593 sulfur Substances 0.000 claims abstract description 46
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 43
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims description 99
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 35
- 230000003014 reinforcing effect Effects 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000010926 purge Methods 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 15
- 239000002912 waste gas Substances 0.000 claims description 15
- 241000405070 Percophidae Species 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000007667 floating Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 239000000080 wetting agent Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 21
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 230000008929 regeneration Effects 0.000 abstract description 7
- 238000011069 regeneration method Methods 0.000 abstract description 7
- 241000237942 Conidae Species 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 230000005587 bubbling Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 49
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 11
- 239000002245 particle Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000013101 initial test Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000009825 accumulation 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
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
Abstract
The invention discloses a normal-pressure acid gas desulfurization device, which belongs to the technical field of gas purification, and comprises a middle straight section cylinder body, a bottom conical shell and a top vault shell cover; the middle straight section cylinder body is internally provided with a supporting beam seat, a plurality of acid gas distribution inner cylinders, a plurality of acid gas distributors, a plurality of air distributors and an exhaust gas emission vertical pipe; the middle straight section cylinder body and the bottom cone shell are internally provided with desulfurizing agent solution, and the bottom of the bottom cone shell is provided with a sulfur discharge port; when the sulfuric acid gas enters into the desulfurizing agent solution for reaction, elemental sulfur is removed, and then the regeneration is realized through the uniform bubbling mixing reaction of an air distributor. The acid gas desulfurization and the desulfurizing agent solution regeneration are concentrated in one cylinder, so that the whole acid gas desulfurization device has the advantages of simple structure, simple desulfurization process flow, high equipment cost and operation cost, high economy, small occupied area, low investment cost and low daily operation cost.
Description
Technical Field
The invention relates to the technical field of gas purification, in particular to a normal-pressure acid gas desulfurization device.
Background
Hydrogen sulfide is a hazardous gas that must be desulphurised before being vented to the atmosphere or into the next process stage. The common desulfurization process can be divided into a dry desulfurization process and a wet desulfurization process, wherein the complex iron is a wet oxidation reduction method for removing sulfides by using iron as a catalyst in the wet desulfurization technology, and the method has the advantages of low energy consumption, low environmental requirement, high hydrogen sulfide removal rate and no CO 2 The method has the advantages of content influence, one-step conversion of monosulfur and the like, and the equipment using the complex iron wet desulfurization technology in the prior art generally adopts a double-tower process, such as the prior patent number is CN105148731B, and the name is an MDEA regenerated acid gas desulfurization circulation regeneration process. Two towers are serially connected or parallelly connected to realize desulfurization or one desulfurization and one regeneration through the opening and closing of the connected pipeline and valve; the equipment cost and the operation cost of the double-tower process are high, and the process device is complexAnd the floor area is wide and skid-mounted is difficult.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a normal pressure acid gas desulfurization device, which solves the problems of complex process device, high equipment cost and high operation cost of acid gas desulfurization equipment in the prior art due to the adoption of a double-tower process for desulfurization.
In order to achieve the above purpose, the invention adopts the following technical scheme: an atmospheric acid gas desulfurization device comprises a middle straight section cylinder body, a bottom conical shell and a top vault shell cover which are connected with each other;
the inside of the middle straight section cylinder body is provided with a supporting beam seat, a plurality of air distributors and an exhaust gas discharge vertical pipe, the supporting beam seat is provided with a plurality of acid gas distribution inner cylinders, and each acid gas distribution inner cylinder is internally provided with an acid gas distributor communicated with an acid gas source;
the air distributors are arranged in the middle straight section cylinder body and used for diffusing external air into the bottom cylinder body, and the external air in the bottom conical shell body is diffused upwards;
the bottom end of the waste gas discharge vertical pipe is fixedly connected with the support beam seat, and the other end of the waste gas discharge vertical pipe penetrates through the top vault shell cover and is positioned outside; a plurality of exhaust strip-shaped grooves communicated with the inside of the exhaust gas discharge vertical pipe are arranged on the pipe wall of the exhaust gas discharge vertical pipe positioned in the middle straight section cylinder body;
the middle straight section cylinder body and the bottom conical shell are internally provided with desulfurizing agent solution, the liquid level of the desulfurizing agent solution is higher than the height of the top of each acid gas distribution inner cylinder and is smaller than the heights of a plurality of exhaust strip-shaped grooves; the bottom of the bottom cone shell is provided with a sulfur discharge port.
The basic principle of the normal pressure acid gas desulfurization device in the invention is as follows: the acid gas enters an acid gas distribution inner cylinder through an acid gas distributor, hydrogen sulfide in the acid gas reacts with a desulfurizing agent solution, the hydrogen sulfide is oxidized into elemental sulfur, and the elemental sulfur enters a bottom conical shell under the action of gravity and is discharged through a sulfur discharge port; the air distributors are used for conveying air into the desulfurizing agent solution, and the desulfurizing agent solution reacts with oxygen in the air and is regenerated; the acid gas after desulfurization is insoluble in the desulfurizing agent solution and is discharged at the inner top of the middle straight section cylinder body, and enters the exhaust gas discharge vertical pipe through the exhaust strip groove to be discharged into the atmosphere, so that the desulfurization treatment of the acid gas is completed.
Further, the support beam seat is of a circular structure and comprises a plurality of support beams which are arranged in a crisscross manner, and the support beam seat is arranged at the inner bottom of the middle straight section cylinder body;
the axis of the waste gas discharge vertical pipe coincides with the axis of the middle straight section cylinder body; the air distributors and the acid gas distribution inner cylinders are uniformly arranged at intervals in the circumferential direction by taking the axis of the waste gas discharge vertical pipe as the center.
Further, every sour gas distributor all includes the first air inlet pipe of vertical setting, the top of first air inlet pipe passes top vault cap and is located outside and with sour gas source intercommunication, the bottom of first air inlet pipe is located sour gas distribution inner tube, the bottom intercommunication of first air inlet pipe is provided with first distribution and is responsible for, first distribution is responsible for and is provided with many first outlet duct along its self length direction intercommunication, all the intercommunication is provided with a plurality of first duckbilled shower nozzles of giving vent to anger on every first outlet duct, the injection direction of every first duckbilled shower nozzle of giving vent to anger all faces bottom cone shell.
Further, every air distributor all includes the second air inlet pipe of vertical setting, the top of second air inlet pipe passes top vault cap and is located outside and with outside air supply intercommunication, the bottom intercommunication of second air inlet pipe is provided with the second distribution and is responsible for, the second distribution is responsible for and is annular structure and surrounds single sour gas distribution inner tube, the second distribution is responsible for the bottom that is located single sour gas distribution inner tube, be provided with many second outlet duct along its self annular direction on the second distribution is responsible for, all communicate on every second outlet duct and be provided with a plurality of second duckbilled shower nozzles of giving vent to anger, the injection direction of every second duckbilled shower nozzle of giving vent to anger all faces bottom cone shell.
Further, a water proportioning solution nozzle is arranged on the top vault shell cover and is used for spraying a sulfur wetting agent on the solution surface in the tower so as to destroy foam or floating sulfur accumulated on the surface of the desulfurizing agent solution; the concentration of sulfur in the sulfur wetting agent is 4-6 g/L.
Further, a sulfur slurry ingress pipe is arranged on the top vault shell cover, the top end of the sulfur slurry ingress pipe penetrates through the top vault shell cover to be located outside, and the bottom end of the sulfur slurry ingress pipe penetrates through the supporting beam seat to be located on the inner side of the top of the bottom conical shell.
Further, a skirt is circumferentially arranged on the outer edge side wall of the top of the bottom conical shell.
Further, be provided with the reinforcing support ring on the circumference outer wall of middle straight section cylinder barrel bottom, the reinforcing support ring is including annular first reinforcing plate and the second reinforcing plate that sets up in middle straight section cylinder barrel bottom, and first reinforcing plate welds with the circumference outer wall of middle straight section cylinder barrel bottom, and first reinforcing plate and second reinforcing plate interval evenly welding have arranged polylith strengthening rib.
Further, a plurality of layers of air purging members are uniformly arranged in the bottom conical shell at intervals along the length direction of the bottom conical shell, each layer of air purging member comprises an air purging pipe which is fixedly arranged on the inner conical surface of the bottom conical shell in a circumferential direction, a plurality of air spray heads are uniformly arranged on the air purging pipe at intervals in the circumferential direction, and two sides of the air purging pipe are provided with connecting pipes communicated with an external air source;
the upper surface of the support beam seat is provided with a hot water coil pipe which is communicated with an external hot water source, and the heating temperature of the hot water coil pipe is 23 ℃.
Further, a vent connection port and an exhaust gas sampling port are respectively arranged on the pipe section of the exhaust gas discharge vertical pipe positioned outside the top vault shell cover;
the desulfurizing agent solution is a complex iron ion proportioning solution; and inspection manholes are formed in the outer side walls of the top and bottom cylindrical barrels of the top vault shell cover.
The beneficial effects of the invention are as follows: 1. according to the normal-pressure acid gas desulfurization device, the middle straight section cylinder body, the bottom conical shell and the top vault shell cover are arranged, and the absorption area and the oxidation area are arranged in the device, so that the acid gas desulfurization and the desulfurizing agent solution regeneration are concentrated in one cylinder body, the whole acid gas desulfurization device is simple and concise in structure, simple in desulfurization process flow, high in equipment cost and operation cost, high in economic performance, small in occupied area, low in investment cost and low in daily operation cost.
2. According to the normal-pressure acid gas desulfurization device, the medium in the normal-pressure acid gas desulfurization device is uniformly distributed through the air distributors, the acid gas multi-layer air sweeping pieces and the hot water coil pipe, the reaction temperature can be constant, the reaction effect is good, and hydrogen sulfide in acid gas is thoroughly absorbed.
3. According to the normal-pressure acid gas desulfurization device, the water proportioning solution is sprayed on the surface of the desulfurizing agent solution through the water proportioning solution nozzle and the sulfur slurry inlet pipe, so that foam or floating sulfur accumulated on the surface of the desulfurizing agent solution is destroyed. Spraying water to mix the solution and introducing large-particle elemental sulfur into one inner side of the top of the conical shell at the bottom, and accelerating the precipitation speed of the elemental sulfur in the desulfurizing agent solution in the initial test operation stage of the normal-pressure acid gas desulfurizing device, thereby being convenient for quickly realizing solid-liquid separation.
4. According to the normal-pressure acid gas desulfurization device, the reinforcing support ring is arranged on the circumferential outer wall of the bottom of the middle straight-section cylinder body, and the structural strength of the middle straight-section cylinder body is reinforced by the reinforcing support ring, so that the middle straight-section cylinder body is firmer, and the problem that the middle straight-section cylinder body is damaged and deformed due to the stress generated by overweight of the acid gas desulfurization device can be prevented.
Drawings
FIG. 1 is a schematic diagram of a normal pressure acid gas desulfurization apparatus.
Fig. 2 is a schematic top view of a normal pressure acid gas desulfurization apparatus.
Fig. 3 is a schematic top view of the support beam seat.
FIG. 4 is a schematic view of a single sour gas distributor disposed within a sour gas distribution inner barrel.
FIG. 5 is a schematic top view of a single sour gas distributor disposed within a sour gas distribution inner barrel.
Fig. 6 is a schematic view of the configuration of the air distributor disposed in the middle straight cylindrical shell.
Fig. 7 is a schematic top view of an air distributor disposed within a middle straight cylindrical barrel.
Fig. 8 is a schematic view of a cross-sectional structure in the forward direction of the reinforced support ring.
Fig. 9 is a schematic top view of a single layer air purge.
Fig. 10 is a schematic view of the arrangement of the hot water coil on the support beam base.
1, a middle straight section cylinder body; 2. a bottom conical shell; 3. a top dome cover; 4. a support beam seat; 5. an air distributor; 6. an exhaust gas discharge riser; 7. an acid gas distribution inner cylinder; 8. an acid gas distributor; 9. a vent bar slot; 10. a sulfur discharge port; 11. a support beam; 12. a first air intake duct; 13. a first distribution director; 14. a first air outlet pipe; 15. a first outlet duckbill spray head; 16. a second air intake duct; 17. a second distribution main pipe; 18. a second air outlet pipe; 19. a second air outlet duckbill spray head; 20. a water proportioning solution nozzle; 21. a sulfur slurry ingress pipe; 22. a skirt; 23. reinforcing the support ring; 24. a first reinforcing plate; 25. a second reinforcing plate; 26. reinforcing ribs; 27. an air purge; 28. an air purge tube; 29. an air nozzle; 30. a hot water coil; 31. venting the connection port; 32. an exhaust gas sampling port; 33. a manhole is inspected; 34. a liquid surface.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
As shown in fig. 1 to 3, the invention provides an atmospheric acid gas desulfurization device, which comprises a middle straight section cylindrical shell body 1, a bottom conical shell body 2 and a top dome cover 3 which are connected with each other.
A vent connection port 31 and a waste gas sampling port 32 are respectively arranged on the pipe section of the waste gas discharge vertical pipe 6 positioned outside the top vault shell cover 3; the emptying connection port 31 is used for removing the acid gas after desulfurization; the exhaust gas sampling port 32 is used for sampling the sour gas and detecting whether the desulfurization of the hydrogen sulfide in the sour gas is complete. And the top of the top vault shell cover 3 and the outer side wall of the bottom of the middle straight section cylinder body 1 are respectively provided with an inspection manhole 33.
The inside of middle straight section cylinder barrel 1 is provided with supporting beam seat 4, a plurality of air distributor 5 and exhaust emission riser 6, is provided with a plurality of sour gas distribution inner tube 7 on the supporting beam seat 4, all is provided with a sour gas distributor 8 with sour gas air supply intercommunication in every sour gas distribution inner tube 7. The acid gas distribution inner cylinder 7 is arranged to separate the acid gas distributor 8 from the air distributor 5, so that two mediums can flow into the bottom conical shell 2 separately; and the acid gas distributor 8 is independently installed and detached in the acid gas distribution inner cylinder 7.
The air distributors 5 are arranged at the inner bottom of the middle straight section cylindrical shell 1, and the air distributors 5 are used for diffusing outside air into the bottom conical shell 2; the bottom end of the waste gas discharge vertical pipe 6 is fixedly connected with the support beam seat 4, and the other end of the waste gas discharge vertical pipe penetrates through the top vault shell cover 3 and is positioned outside; the wall of the exhaust gas discharge vertical pipe 6 positioned in the middle straight section cylinder body 1 is provided with a plurality of exhaust strip-shaped grooves 9 communicated with the inside of the exhaust gas discharge vertical pipe.
The middle straight section cylinder body 1 and the bottom conical shell 2 are internally provided with desulfurizing agent solution, and the liquid level 34 of the desulfurizing agent solution is higher than the top of each acid gas distribution inner cylinder 7 and is lower than the heights of a plurality of exhaust strip grooves 9; the bottom of the bottom cone housing 2 is provided with a sulphur outlet 10. Specifically, the desulfurizing agent solution is a complex iron ion proportioning solution.
The desulfurization process of the normal pressure acid gas desulfurization device comprises the following steps: the acid gas enters the acid gas distribution inner cylinder 7 through the acid gas distributor 8, hydrogen sulfide in the acid gas reacts with the desulfurizing agent solution, the hydrogen sulfide is oxidized into elemental sulfur, and the elemental sulfur enters the bottom conical shell 2 under the action of gravity and is discharged through the sulfur discharge port 10; the plurality of air distributors 5 convey air into the desulfurizing agent solution, and the desulfurizing agent solution reacts with oxygen in the air and is regenerated; the acid gas after desulfurization is insoluble in the desulfurizing agent solution and is discharged at the inner top of the middle straight section cylinder body 1, enters the waste gas discharge vertical pipe 6 through the exhaust bar-shaped groove 9 and is discharged into the atmosphere, and the desulfurization treatment of the acid gas is completed.
Through setting up middle straight section cylinder barrel 1, bottom conical shell 2 and top vault cap 3, realize all concentrating on a barrel with sour gas desulfurization and desulfurizing agent solution regeneration for whole sour gas desulfurization device structure is succinct, and desulfurization process flow is simple, and reduction equipment cost and operation cost are high, and economic performance is high, and area is little, and the investment cost is few, and daily running cost is low.
Specifically, as shown in fig. 3, the support beam seat 4 has a circular structure, the support beam seat 4 comprises a plurality of support beams 11 which are arranged in a crisscross manner, and the support beam seat 4 is arranged at the inner bottom of the middle straight section cylinder body 1; the axis of the waste gas discharge vertical pipe 6 coincides with the axis of the middle straight section cylinder body 1; the air distributors 5 and the acid gas distribution inner cylinders 7 are uniformly arranged at intervals in the circumferential direction by taking the axis of the waste gas discharge vertical pipe 6 as the center.
As shown in fig. 4 and 5, as a specific arrangement mode of the acid gas distributors 8, each acid gas distributor 8 includes a first air inlet conduit 12 vertically arranged, the top end of the first air inlet conduit 12 passes through the top dome cover 3 to be located outside and is communicated with an acid gas source, the bottom end of the first air inlet conduit 12 is located in the acid gas distribution inner cylinder 7, the bottom end of the first air inlet conduit 12 is communicated with a first distribution main pipe 13, the first distribution main pipe 13 is communicated with a plurality of first air outlet pipes 14 along the length direction thereof, a plurality of first air outlet duckbill nozzles 15 are communicated with each first air outlet pipe 14, and the spraying direction of each first air outlet duckbill nozzle 15 faces the bottom cone housing 2.
The process of the acid gas entering the desulfurizing agent solution is as follows: firstly, acid gas enters the first distribution main pipe 13 through the first air inlet pipe 12, then enters the first air outlet duckbill spray head 15 through the plurality of first air outlet pipes 14, so that the uniformity of the acid gas air outlet is realized, the contact area between the acid gas and the desulfurizing agent solution is increased, the desulfurization reaction between the acid gas and the desulfurizing agent solution is more thorough, the absorption of hydrogen sulfide in the acid gas is thorough, and the removal effect and efficiency of the hydrogen sulfide are improved.
Specifically, as shown in fig. 6-7, each air distributor 5 includes a second air inlet conduit 16 vertically arranged, the top end of the second air inlet conduit 16 passes through the top dome cover 3 to be located outside and is communicated with an external air source, a second distribution main pipe 17 is arranged at the bottom end of the second air inlet conduit 16 in a communicated manner, the second distribution main pipe 17 is in an annular structure and surrounds the single acid gas distribution inner cylinder 7, the second distribution main pipe 17 is located at the bottom of the single acid gas distribution inner cylinder 7, a plurality of second air outlet pipes 18 are arranged on the second distribution main pipe 17 along the annular direction of the second air outlet pipe, a plurality of second air outlet duckbill spray heads 19 are arranged on each second air outlet pipe 18 in a communicated manner, and the spraying direction of each second air outlet duckbill spray head 19 faces the bottom cone housing 2.
The process of delivering air into the desulfurizing agent solution by the air distributor 5 is as follows: air enters the second distribution main pipe 17 through the second air inlet guide pipe 16, is sprayed out towards the bottom conical shell 2 through the second distribution main pipe 17 and the second air outlet duckbill spray head 19, is uniformly distributed, is fully diffused into the bottom conical shell 2, increases the contact area between oxygen in the air and the desulfurizing agent solution, improves the regenerating efficiency of the desulfurizing agent solution, and finally achieves the effect and efficiency of desulfurizing the whole device.
Preferably, but not limited to, as shown in fig. 10, the upper surface of the support beam seat 4 is provided with a hot water coil 30, the hot water coil 30 is communicated with an external hot water source, and the heating temperature of the hot water coil 30 is 23 ℃; through a plurality of air distributors 5, a plurality of acid gas multi-layer air sweeping pieces 27 and a hot water coil 30, the medium in the normal pressure acid gas desulfurization device is uniformly distributed, the reaction temperature can be constant, the reaction effect is good, and the hydrogen sulfide in the acid gas is thoroughly absorbed.
Specifically, as shown in fig. 1 and 2, a water proportioning solution nozzle 20 is provided on the top dome cover 3. The top vault cover 3 is provided with a sulfur slurry ingress pipe 21, the top end of the sulfur slurry ingress pipe 21 passes through the top vault cover 3 to be positioned outside, and the bottom end of the sulfur slurry ingress pipe 21 passes through the supporting beam seat 4 to be positioned on the inner side of the top of the bottom conical shell 2.
Since sulfur exists in the desulfurizing agent solution in the form of particles, solid-liquid separation must be performed by a method similar to precipitation. Generally, sulfur is generated in the desulfurizing agent solution and accumulated at the bottom of the middle straight cylindrical drum 1. Since the sulfur density is about twice as high as the water density, the settling velocity is relatively high. Except for the following two special cases:
1) In the initial test operation stage, when the desulfurizing agent solution is just added into the middle straight section cylinder body 1 and the bottom conical shell 2, sulfur with finer particles is easy to form, and the sulfur is not easy to separate. Elemental sulfur is introduced into the desulfurizing agent solution through the sulfur slurry introduction pipe 21, and when the sulfur concentration in the desulfurizing agent solution reaches 4 to 6g/L (0.4 to 0.6 wt%), the sulfur particles are about 15 mu m, and such a size is within an operable range. The sulfur particles serve as mother particles, so that the formation of large particles of 100-150 mu m is promoted, and the precipitation speed of elemental sulfur in the desulfurizing agent solution is accelerated.
2) The sulfur particles may be adsorbed on the microbubbles or encapsulated by the hydrocarbon or float on top of the solution rather than settle to the bottom of the solution. Typically, if there is no place in the system that is blocked by the accumulation of floating sulfur, the floating sulfur eventually adheres to the bubbles and cannot settle. In order to accelerate the precipitation speed of floating sulfur, the water proportioning solution nozzle 20 sprays water proportioning solution to bubbles on the liquid surface 34 of the desulfurizing agent solution, so that the precipitation of sulfur particles is easy, the water proportioning solution is a sulfur wetting agent, and the concentration of sulfur in the sulfur wetting agent is 4-6 g/L. In summary, the water proportioning solution nozzle 20 and the sulfur slurry inlet pipe 21 are arranged, so that the rapid precipitation of elemental sulfur is realized, and the acid gas desulfurization efficiency is improved.
Specifically, as shown in fig. 1 and 9, a plurality of layers of air purging members 27 are uniformly arranged in the bottom conical shell 2 at intervals along the length direction of the bottom conical shell, each layer of air purging member 27 comprises an air purging pipe 28 fixedly arranged on the inner conical surface of the bottom conical shell 2 in a circumferential direction, a plurality of air spray heads 29 are uniformly arranged on the air purging pipe 28 at intervals in the circumferential direction, and two sides of the air purging pipe 28 are provided with connecting pipes communicated with an external air source. The air jets of the plurality of air jets 29 are each directed toward the axial direction of the bottom cone housing 2.
The multi-layer air purge member 27 is used for mixing the sulfur slurry flowing from the sulfur slurry inlet pipe 21, the air flowing from the air distributor 5 and the acid gas flowing from the acid gas distributor 8 in the process of flowing into the bottom conical shell 2 through the air purge pipe 28, so that the medium in the bottom conical shell 2 is mixed faster under the air purge action of the air spray nozzle 29, and the reaction efficiency of acid gas desulfurization and desulfurizing agent solution regeneration is improved.
As shown in fig. 1, 2 and 8, a skirt 22 is circumferentially arranged on the outer edge side wall of the top of the bottom cone housing 2, and the skirt 22 is arranged for realizing the fixation of the bottom cone housing 2 and the support of the device.
The outer circumferential wall of the bottom of the middle straight-section cylindrical barrel 1 is provided with a reinforcing support ring 23, the reinforcing support ring 23 comprises a first reinforcing plate 24 and a second reinforcing plate 25 which are annularly arranged at the bottom of the middle straight-section cylindrical barrel 1, the first reinforcing plate 24 is welded with the outer circumferential wall of the bottom of the middle straight-section cylindrical barrel 1, and a plurality of reinforcing ribs 26 are uniformly welded and arranged on the first reinforcing plate 24 and the second reinforcing plate 25 at intervals. The strengthening support ring strengthens the structural strength of the middle straight-section cylindrical barrel 1, so that the middle straight-section cylindrical barrel 1 is firmer, and the problem that the middle straight-section cylindrical barrel 1 is damaged and deformed due to the stress generated by overweight of the acid gas desulfurization device can be prevented.
Claims (8)
1. The normal pressure acid gas desulfurization device is characterized by comprising a middle straight section cylinder body, a bottom conical shell and a top vault shell cover which are connected with each other;
the inside of the middle straight section cylinder body is provided with a supporting beam seat, a plurality of air distributors and an exhaust gas discharge vertical pipe, a plurality of acid gas distribution inner cylinders are arranged on the supporting beam seat, and each acid gas distribution inner cylinder is internally provided with an acid gas distributor communicated with an acid gas source;
the air distributors are arranged in the middle straight section cylinder body and are used for diffusing external air into the bottom conical shell, and the external air in the bottom conical shell diffuses upwards;
the bottom end of the waste gas discharge vertical pipe is fixedly connected with the support beam seat, and the other end of the waste gas discharge vertical pipe penetrates through the top vault shell cover and is positioned outside; a plurality of exhaust strip-shaped grooves communicated with the inside of the exhaust gas discharge vertical pipe are arranged on the pipe wall of the exhaust gas discharge vertical pipe positioned in the middle straight section cylinder body;
the middle straight section cylinder body and the inner part of the bottom conical shell are respectively provided with a desulfurizing agent solution, the liquid level of the desulfurizing agent solution is higher than the height of the top of each acid gas distribution inner cylinder and is smaller than the heights of a plurality of exhaust strip-shaped grooves; the bottom of the bottom conical shell is provided with a sulfur discharge port;
the top vault shell cover is provided with a water proportioning solution nozzle which is used for spraying a sulfur wetting agent on the surface of the solution in the tower so as to destroy foam or floating sulfur accumulated on the surface of the desulfurizing agent solution; the concentration of sulfur in the sulfur wetting agent is 4-6 g/L;
the top vault shell cover is provided with a sulfur slurry ingress pipe, the top end of the sulfur slurry ingress pipe penetrates through the top vault shell cover to be located outside, and the bottom end of the sulfur slurry ingress pipe penetrates through the support beam seat to be located on the inner side of the top of the bottom conical shell.
2. The normal pressure acid gas desulfurization device according to claim 1, wherein the support beam seat is of a circular structure, the support beam seat comprises a plurality of support beams which are arranged in a crisscross manner, and the support beam seat is arranged at the inner bottom of the middle straight section cylinder body;
the axis of the waste gas discharge vertical pipe is coincident with the axis of the middle straight section cylinder body; the air distributors and the acid gas distribution inner cylinders are uniformly arranged at intervals in a circumferential direction by taking the axis of the waste gas discharge vertical pipe as the center.
3. The atmospheric pressure sour gas desulfurization device of claim 1, wherein each sour gas distributor comprises a first air inlet conduit arranged vertically, the top end of the first air inlet conduit penetrates through the top vault shell cover to be located outside and communicated with a sour gas source, the bottom end of the first air inlet conduit is located in the sour gas distribution inner barrel, a first distribution main pipe is arranged at the bottom end of the first air inlet conduit in a communicated mode, a plurality of first air outlet pipes are arranged at the first distribution main pipe in a communicated mode along the length direction of the first distribution main pipe, a plurality of first air outlet duckbill nozzles are arranged on each first air outlet pipe in a communicated mode, and the spraying direction of each first air outlet duckbill nozzle faces the bottom conical shell.
4. A normal pressure sour gas desulfurization device according to claim 3, wherein each air distributor comprises a second air inlet conduit which is vertically arranged, the top end of each second air inlet conduit penetrates through the top vault shell cover to be located outside and is communicated with an external air source, a second distribution main pipe is arranged at the bottom end of each second air inlet conduit in a communicating mode, the second distribution main pipe is of an annular structure and surrounds a single sour gas distribution inner cylinder, the second distribution main pipe is located at the bottom of the single sour gas distribution inner cylinder, a plurality of second air outlet pipes are arranged on the second distribution main pipe along the annular direction of the second distribution main pipe, a plurality of second air outlet duckbill nozzles are arranged on each second air outlet pipe in a communicating mode, and the spraying direction of each second air outlet duckbill nozzle faces the bottom conical shell.
5. The atmospheric acid gas desulfurization apparatus of claim 1, wherein a skirt is circumferentially disposed on the peripheral sidewall of the top of the bottom conical housing.
6. The atmospheric acid gas desulfurization device according to claim 1, wherein a reinforcing support ring is arranged on the circumferential outer wall of the bottom of the middle straight-section cylinder body, the reinforcing support ring comprises a first reinforcing plate and a second reinforcing plate which are annularly arranged at the bottom of the middle straight-section cylinder body, the first reinforcing plate is welded with the circumferential outer wall of the bottom of the middle straight-section cylinder body, and a plurality of reinforcing ribs are uniformly welded at intervals on the first reinforcing plate and the second reinforcing plate.
7. The normal pressure acid gas desulfurization device according to claim 1, wherein a plurality of layers of air purging members are uniformly arranged in the bottom conical shell at intervals along the length direction of the bottom conical shell, each layer of air purging member comprises an air purging pipe fixedly arranged on the inner conical surface of the bottom conical shell in a circumferential direction, a plurality of air spray heads are uniformly arranged on the air purging pipes at intervals in the circumferential direction, and two sides of each air purging pipe are provided with a connecting pipe communicated with an external air source;
the upper surface of supporting beam seat is provided with hot water coil pipe, hot water coil pipe and outside hot water source intercommunication, the heating temperature of hot water coil pipe is 23 ℃.
8. The atmospheric acid gas desulfurization apparatus according to claim 1, wherein a vent connection port and an exhaust gas sampling port are respectively provided on a pipe section of the exhaust gas discharge riser located outside the top dome cover;
the desulfurizing agent solution is a complex iron ion proportioning solution; and inspection manholes are formed in the outer side walls of the lower sections of the top and bottom cylinders of the top vault shell cover.
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