CN211799659U - Processing apparatus of high concentration hydrogen sulfide gas - Google Patents
Processing apparatus of high concentration hydrogen sulfide gas Download PDFInfo
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- CN211799659U CN211799659U CN202020409934.1U CN202020409934U CN211799659U CN 211799659 U CN211799659 U CN 211799659U CN 202020409934 U CN202020409934 U CN 202020409934U CN 211799659 U CN211799659 U CN 211799659U
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- 239000007789 gas Substances 0.000 title claims abstract description 107
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 92
- 238000012545 processing Methods 0.000 title claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 269
- 239000007788 liquid Substances 0.000 claims abstract description 159
- 238000005507 spraying Methods 0.000 claims abstract description 111
- 230000008929 regeneration Effects 0.000 claims abstract description 94
- 238000011069 regeneration method Methods 0.000 claims abstract description 94
- 238000000746 purification Methods 0.000 claims abstract description 80
- 238000003860 storage Methods 0.000 claims abstract description 50
- 239000000835 fiber Substances 0.000 claims abstract description 32
- 239000002912 waste gas Substances 0.000 claims abstract description 32
- 239000000428 dust Substances 0.000 claims abstract description 29
- 239000007921 spray Substances 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 16
- 125000000524 functional group Chemical group 0.000 claims description 13
- 239000004745 nonwoven fabric Substances 0.000 claims description 10
- 125000004076 pyridyl group Chemical group 0.000 claims description 8
- 125000001453 quaternary ammonium group Chemical group 0.000 claims description 7
- 125000003277 amino group Chemical group 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 description 31
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 24
- 238000000034 method Methods 0.000 description 22
- 238000005342 ion exchange Methods 0.000 description 20
- 238000001179 sorption measurement Methods 0.000 description 18
- 229920006395 saturated elastomer Polymers 0.000 description 16
- 239000000243 solution Substances 0.000 description 13
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 239000003513 alkali Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010992 reflux Methods 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 239000005708 Sodium hypochlorite Substances 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 125000003368 amide group Chemical group 0.000 description 3
- 238000010170 biological method Methods 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 235000019645 odor Nutrition 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 210000000697 sensory organ Anatomy 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model provides a treatment device of high-concentration hydrogen sulfide gas, which comprises a hydrogen peroxide spraying system, a dust removal device and a purification unit which are sequentially communicated; the purification unit comprises purification equipment, a regeneration liquid storage tank, a regeneration liquid spraying system and a hydrogen peroxide adding system; a regenerated liquid storage tank is arranged below the purifying equipment, a regenerated liquid spraying system is arranged above the purifying equipment, and the regenerated liquid storage tank is communicated with the regenerated liquid spraying system through a pipeline; the purification equipment comprises a plurality of layers of purification filter layers, wherein the plurality of layers of purification filter layers are arranged in parallel, gaps are formed between adjacent filter layers to form a plurality of parallel gas channels, and the hydrogen sulfide waste gas is introduced into the gas channels in parallel; in any two adjacent gas channels, the gas inlet of one gas channel is sealed, and the gas outlet of the other gas channel is sealed. The purification unit of the utility model is provided with a hydrogen peroxide adding system to eliminate secondary pollution; the fiber structure of the purification filter layer is protected from being damaged, and the service life of the purification filter layer is prolonged.
Description
Technical Field
The utility model belongs to the technical field of the atmosphere pollution control, especially, relate to a treatment process and processing apparatus of high concentration hydrogen sulfide gas body.
Background
Along with the continuous improvement of the requirements of people on living environmentThe problem of malodor caused by various odors has been receiving much attention and attention from various countries. Malodorous pollutants are perceived pollutants which not only irritate the sensory organs of the human body and make the human body dislike, but also contain certain harmful substances such as hydrogen sulfide (H)2S), etc. directly endanger human health, so malodorous pollution has been considered to be second only to one of 6 public hazards of noise. H2S is a gas having highly irritating and choking egg odor, H in industrial production2The existence of S gas can cause the problems of corrosion of equipment and pipelines, catalyst poisoning and the like, and H in the environment2The S gas can pose a serious threat to the personal safety of the workers.
H in gas2The common processing method of S comprises the following steps: combustion method, adsorption method, liquid absorption method, oxidation method, electrochemical method, biological method and combined process purification method, etc., wherein the liquid absorption method and the biological method become the main methods for treating hydrogen sulfide at present, but the biological method has the defects of poor operation stability, long production halt recovery period, large floor area, etc.; the liquid absorption method mainly comprises spraying of alkali liquor in a spray tower, which has insufficient purification precision, and the hydrogen sulfide volatilized from the sulfide in the absorption liquid can cause secondary pollution to air.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a processing apparatus of high concentration hydrogen sulfide gas body, the utility model provides a processing apparatus can deep purification hydrogen sulfide waste gas to avoid the secondary pollution of hydrogen sulfide.
The utility model provides a treatment device of high-concentration hydrogen sulfide gas, which comprises a hydrogen peroxide spraying system, a dust removal device and a purification unit which are sequentially communicated;
the purification unit comprises purification equipment, a regeneration liquid storage tank, a regeneration liquid spraying system and a hydrogen peroxide adding system;
a regenerated liquid storage tank is arranged below the purifying equipment, a regenerated liquid spraying system is arranged above the purifying equipment, and the regenerated liquid storage tank is communicated with the regenerated liquid spraying system through a pipeline;
the purification equipment comprises a plurality of layers of purification filter layers, wherein the plurality of layers of purification filter layers are arranged in parallel, gaps are formed between adjacent filter layers to form a plurality of parallel gas channels, and the hydrogen sulfide waste gas is introduced into the gas channels in parallel;
in any two adjacent gas channels, the gas inlet of one gas channel is sealed, and the gas outlet of the other gas channel is sealed;
and the hydrogen peroxide adding system is used for conveying hydrogen peroxide to the regeneration liquid storage tank.
Preferably, the hydrogen peroxide spraying system is provided with a hydrogen peroxide storage tank for providing hydrogen peroxide spraying liquid for the hydrogen peroxide spraying system.
Preferably, the bottom of the hydrogen peroxide spraying system is provided with an air inlet, and the top of the hydrogen peroxide spraying system is provided with an air outlet.
Preferably, the thickness of the filtering layer is 1-10 mm.
Preferably, the width of the gap between the adjacent filter layers is 20-100 mm.
Preferably, the number of the filter layers is 5-100.
Preferably, the bottom of the regenerated liquid storage tank is provided with a regenerated liquid outlet, the regenerated liquid outlet is provided with a regenerated liquid circulating stirring pump,
the regenerated liquid circulating stirring pump is provided with two outlets, one outlet is connected with the regenerated liquid spraying system and is used for conveying regenerated liquid to the regenerated liquid spraying system; and the other outlet is connected with a regeneration liquid return pipeline for returning the mixed liquid of the hydrogen peroxide and the regeneration liquid.
Preferably, the hydrogen peroxide adding system comprises a hydrogen peroxide storage tank and a hydrogen peroxide adding pump;
the bottom of the hydrogen peroxide storage tank is provided with a hydrogen peroxide outlet, and the hydrogen peroxide outlet is provided with a hydrogen peroxide feeding pump for pumping the hydrogen peroxide in the hydrogen peroxide storage tank to the regeneration liquid storage tank.
Preferably, the purifying filter layer is a fiber or non-woven fabric with a surface containing basic functional groups, and the basic functional groups are one or more of amino groups, quaternary ammonium groups and pyridyl groups.
The utility model provides a treatment device of high-concentration hydrogen sulfide gas, which comprises a hydrogen peroxide spraying system, a dust removal device and a purification unit which are communicated in sequence; the purification unit comprises purification equipment, a regeneration liquid storage tank, a regeneration liquid spraying system and a hydrogen peroxide adding system; a regenerated liquid storage tank is arranged below the purifying equipment, a regenerated liquid spraying system is arranged above the purifying equipment, and the regenerated liquid storage tank is communicated with the regenerated liquid spraying system through a pipeline; the purification equipment comprises a plurality of layers of purification filter layers, wherein the plurality of layers of purification filter layers are arranged in parallel, gaps are formed between adjacent filter layers to form a plurality of parallel gas channels, and the hydrogen sulfide waste gas is introduced into the gas channels in parallel; in any two adjacent gas channels, the gas inlet of one gas channel is sealed, and the gas outlet of the other gas channel is sealed; and the hydrogen peroxide adding system is used for conveying hydrogen peroxide to the regeneration liquid storage tank. The utility model discloses at first through the hydrogen peroxide spraying system who uses hydrogen peroxide as spraying liquid, then carry out dust collector and detach the sulphur simple substance that is taken out by hydrogen peroxide spraying system, get into at last and use basic ion exchange fiber non-woven fabrics (the fibrous surface contains groups such as amido, quaternary ammonium group or pyridyl) as the ion exchange fiber purification unit who purifies the filtering layer. The waste gas containing hydrogen sulfide penetrates through the purification filter layer and is adsorbed and purified to achieve near zero emission, the purification filter layer with saturated adsorption is sprayed by regeneration liquid to be regenerated to carry out next round of adsorption, a certain amount of hydrogen peroxide is added into the sprayed alkali liquor, the sulfide and the hydrogen peroxide are fully reacted in a pump backflow stirring mode, secondary pollution caused by release of the hydrogen sulfide from the regeneration liquid is eliminated, and meanwhile, the deep purification effect of the hydrogen sulfide gas is guaranteed. Additionally, the utility model discloses a hydrogen peroxide's addition, the fibrous structure that can protect the purification filtering layer does not receive destruction, has effectively prolonged the life who purifies the filtering layer.
The treatment device of the utility model is provided with the hydrogen peroxide spraying pretreatment system, which provides guarantee for the stable operation of the purification unit and avoids the problem of secondary pollution caused by the volatilization of hydrogen sulfide of saturated spraying liquid after the general alkali liquor spraying pretreatment; easy operation, operating condition requirements such as sealed to equipment, pressure are lower, operating stability is good, because the utility model provides an intermittent type regeneration technology, the utility model discloses an equipment can park at any time, and area is little.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a medium-high concentration hydrogen sulfide gas treatment device according to the present invention;
wherein, A is a hydrogen peroxide spraying system, B is a spraying liquid storage tank, C is a bag type dust collector, D is purifying equipment, E is a regenerated liquid storage tank, F is the hydrogen peroxide storage tank, G is the spraying system, P1 is a spraying liquid delivery pump, P2 is a regenerated liquid circulating stirring pump, and P3 is a hydrogen peroxide adding pump;
fig. 2 is a schematic structural view of the multi-layer purification filter layer of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model also provides a treatment device of high-concentration hydrogen sulfide gas, which comprises a hydrogen peroxide spraying system, a dust removal device and a purification unit which are sequentially communicated;
the purification unit comprises purification equipment, a regeneration liquid storage tank, a regeneration liquid spraying system and a hydrogen peroxide adding system;
a regenerated liquid storage tank is arranged below the purifying equipment, a regenerated liquid spraying system is arranged above the purifying equipment, and the regenerated liquid storage tank is communicated with the regenerated liquid spraying system through a pipeline;
the purifying device comprises a plurality of purifying filter layers, wherein the purifying filter layers are fibers or non-woven fabrics with alkaline functional groups on the surfaces, and the alkaline functional groups are one or more of amino groups, quaternary ammonium groups and pyridyl groups;
and the hydrogen peroxide adding system is used for conveying hydrogen peroxide to the regeneration liquid storage tank.
In the utility model discloses, the top in the hydrogen peroxide spraying system is provided with spraying system. The bottom of the hydrogen peroxide spraying system is also provided with a hydrogen sulfide waste gas inlet and a spraying liquid discharge port; and a gas outlet is formed in the top of the hydrogen peroxide spraying system. The high-concentration hydrogen sulfide waste gas enters from a gas inlet at the bottom of the hydrogen peroxide spraying system, reversely contacts with the hydrogen peroxide spraying liquid sprayed from top to bottom, and is discharged from a gas outlet at the top of the hydrogen peroxide spraying system. The hydrogen peroxide spraying system is also provided with a spraying liquid storage tank which is communicated with a spraying liquid discharge port at the bottom of the spraying system and the hydrogen peroxide spraying system in the hydrogen peroxide spraying system respectively. After the high-concentration hydrogen sulfide waste gas passes through the hydrogen peroxide spraying system, part of hydrogen sulfide in the waste gas is absorbed by the hydrogen peroxide spraying liquid.
The utility model discloses in, inside a plurality of column plates that are provided with of hydrogen peroxide spraying system, a plurality of column plates are along the crisscross setting of direction of gravity with certain interval, the column plate is provided with a plurality of sieve meshes. The utility model discloses it is right the type of column plate does not have special restriction, use the hydrogen peroxide spraying system column plate that hydrogen peroxide spraying system commonly used in this field can.
Because waste gas behind hydrogen peroxide spray system, hydrogen sulfide in the waste gas and hydrogen peroxide reaction generate the elemental sulfur, and partial elemental sulfur is gaseous along with spraying the back and is discharged from hydrogen peroxide spray system, consequently, this application sets up dust collector behind hydrogen peroxide spray system for go out the elemental sulfur granule in the gas. The utility model discloses it is right dust collector's specification model does not have special restriction, adopt the dust collector commonly used in this field can, like bag collector.
The gas after dust removal enters the purifying equipment, in the utility model, the purifying equipment comprises a plurality of purifying filter layers, the structure of the purifying filter layers in the utility model is shown in figure 2, the purifying filter layers are arranged in parallel, a gap is arranged between any two adjacent filter layers to form a plurality of parallel gas channels, the hydrogen sulfide waste gas is introduced in the direction parallel to the purifying filter layers, therefore, one end of the plurality of parallel gas channels is an air inlet, and the other end is an air outlet; and in the utility model discloses in, in arbitrary two adjacent gas passage, one of them gas passage's air inlet is sealed, another gas passage's gas vent is sealed, such design makes multilayer purification filtering layer end to end connection and parallel turn back, form and be similar to "bow font" structure, hydrogen sulfide waste gas lets in with the direction that is on a parallel with the purification filtering layer, because the gas vent of all the other ends of opening the gas passage who has the air inlet all is sealed, consequently, gaseous entering gas passage back, pass from the filtering layer, gas after the purification is discharged from adjacent gas passage's gas vent. The multi-layer purifying and filtering layer with the structure shown in figure 2 of the utility model increases the effective filtering area in unit volume, improves the absorption efficiency and reduces the occupied area of the equipment; meanwhile, the filter layer is more concentrated, which is also beneficial to the spraying regeneration.
In the utility model, the thickness of the filtering layer is preferably 1-10 mm, more preferably 2-8 mm, and most preferably 3-5 mm; the width of the gap between the adjacent filtering layers is preferably 20-100 mm, more preferably 30-80 mm, and most preferably 50-60 mm; the utility model discloses it is right the number of piles of filtering layer does not have special restriction, according to the concentration and the tolerance of hydrogen sulfide waste gas when actual production confirm purify the quantity and the filtering layer area of filtering layer can the utility model discloses in, the number of piles of multilayer filtering layer is preferred 10 ~ 20 layers, more preferably 12 ~ 18 layers, and the most preferred 14 ~ 16 layers. The thickness of each filter layer can be the same or different, and the width of the gap between adjacent filter layers can be the same or different. The utility model discloses it is preferred the thickness of filtering layer is homogeneous thickness to and the width in clearance between the adjacent filtering layer is the homogeneous width.
The utility model discloses in, the multilayer filtering layer does the utility model discloses well purifier's core component, the utility model discloses it is right other parts in the purifier are like fixed equipment, and supporting check out test set etc. do not do special requirement, adopt the accessory that technical personnel in the field are familiar can.
The utility model discloses in, purifier's below is provided with the regeneration liquid storage tank, and the top is provided with regeneration liquid spraying system. The regeneration liquid storage tank is used for holding and storing the regeneration liquid, the regeneration liquid storage tank is uncovered formula container to in collect the regeneration liquid after spraying. The bottom of regeneration liquid storage tank is provided with the regeneration liquid export, regeneration liquid exit department is provided with regeneration liquid circulation agitator pump, regeneration liquid circulation agitator pump through the pipeline with regeneration liquid spraying system is linked together, regeneration liquid circulation agitator pump with still be provided with a branch line on the pipeline that regeneration liquid spraying system is connected, the export of this branch line accesss to the top of regeneration liquid storage tank. Therefore, the two pipelines are communicated with the regenerated liquid circulating stirring pump, so that the regenerated liquid circulating stirring pump can achieve the purposes of conveying regenerated liquid to a regenerated liquid spraying system and performing circulating reflux stirring on hydrogen peroxide and the regenerated liquid.
In the utility model, the hydrogen peroxide adding system comprises a hydrogen peroxide storage tank and a hydrogen peroxide adding pump; the hydrogen peroxide regeneration device comprises a hydrogen peroxide storage tank, and is characterized in that a hydrogen peroxide outlet is formed in the bottom of the hydrogen peroxide storage tank, a hydrogen peroxide feeding pump is arranged at the hydrogen peroxide outlet and used for pumping hydrogen peroxide in the hydrogen peroxide storage tank to the regeneration liquid storage tank.
The utility model provides a high concentration hydrogen sulfide gas processing technology, including following step:
A) hydrogen peroxide spraying and dust removal are sequentially carried out on the hydrogen sulfide waste gas to obtain a gas after dust removal;
the concentration of hydrogen sulfide in the hydrogen sulfide waste gas is 100-1000 ppm;
B) adsorbing the dedusted gas by a purification device and then discharging, and regenerating the purification filter layer with saturated adsorption by adopting regenerated liquid spray for the next round of adsorption;
the purifying equipment comprises a plurality of purifying filter layers, wherein the purifying filter layers are made of fibers or non-woven fabrics with alkaline functional groups on the surfaces, and the alkaline particles are one or more of amino groups, quaternary ammonium groups and pyridyl groups;
C) and adding hydrogen peroxide into the sprayed regeneration liquid, and using the reacted regeneration liquid for the next round of spraying.
The utility model discloses a hydrogen peroxide sprays and adsorbs the process technology who combines together with ion exchange, and the hydrogen sulfide gas of high concentration at first sprays through hydrogen peroxide solution, then gets into dust collector and detach the sulphur simple substance that is taken out by hydrogen peroxide spraying system, gets into at last and uses alkali ion exchange fiber non-woven fabrics to accomplish the purification for the purification unit who purifies the filtering layer.
The utility model discloses in, the content of hydrogen sulfide in the high concentration hydrogen sulfide waste gas is 100 ~ 1000ppm, the mass fraction of hydrogen peroxide spray liquid is preferred 5 ~ 30%, more preferred 10 ~ 25%, the most preferred 15 ~ 20%; in the spraying process, the high-concentration hydrogen sulfide waste gas enters from bottom to top, and the hydrogen peroxide spraying liquid enters from top to bottom to form gas-liquid countercurrent contact, so that the hydrogen sulfide in the high-concentration hydrogen sulfide waste gas is preliminarily absorbed. The utility model takes hydrogen peroxide as the spray liquid, which ensures the purifying effect and simultaneously does not introduce new impurities, thereby avoiding the damage to the purifying filter layer; in addition, the hydrogen peroxide spraying liquid after reaction in the utility model still keeps weak oxidizability, so that the saturated spraying liquid can be prevented from dissolving hydrogen sulfide and volatilizing the hydrogen sulfide again to generate secondary pollution; the saturated spraying liquid has simple components and can be directly discharged after simple solid-liquid separation and acid-base neutralization treatment.
In the present invention, the main function of the dust removal is to remove the elemental sulfur brought out from the spraying step, and the dust removal is a dust removal process commonly used in the art, for example, a dust removal device may be used to remove dust.
After the gas after dust removal is obtained, the utility model firstly leads the gas after dust removal to penetrate the purification filter layer to adsorb the hydrogen sulfide and discharge purified gas;
then, the purification filter layer with saturated adsorption is subjected to spray regeneration by using a regeneration liquid, and the regenerated purification filter layer is subjected to the next round of adsorption;
and adding hydrogen peroxide into the sprayed regeneration liquid to ensure that the sulfide and the hydrogen peroxide fully react, and the reacted regeneration liquid can be used for the next round of spraying.
The content of the hydrogen sulfide in the gas after dust removal obtained by the utility model is less than 100 ppm.
In the utility model, the purifying device comprises a plurality of purifying filter layers, the purifying filter layers are made of fibers or non-woven fabrics with alkaline functional groups on the surface, and the alkaline functional groups are preferably one or more of amido, quaternary ammonium group and pyridyl; the matrix material of the fiber or the non-woven fabric is preferably polyacrylonitrile; the gram weight of the non-woven fabric is preferably 300-500 g/m2More preferably 400g/m2. The exchange capacity of the purification filter layer is preferably 2-8 mmol/g. The utility model discloses in, the thickness of purifying and filtering layer is preferred 1 ~ 10mm, and more preferred is 2 ~ 8mm, and the most preferred is 3 ~ 5 mm. The utility model has no special limit to the layer number of the purifying and filtering layer,
in the present invention, the content of hydrogen sulfide in the hydrogen sulfide waste gas is preferably less than 1000ppm, specifically, in the embodiment of the present invention, it may be 1000ppm, 500ppm or 200 ppm; the speed of the hydrogen sulfide waste gas passing through the purification filter layer is preferably 0.5-5 m/min, more preferably 0.5-3 m/min, and most preferably 1.5m/min, specifically, in an embodiment of the present invention, the speed may be 0.5m/min, 2m/min, or 5 m/min. The air volume of the hydrogen sulfide waste gas is preferably 100-1500 m3More preferably 400 to 1000m3H, in particular, in an embodiment of the invention, may be 200m3/h、500m3H or 1000m3H; the concentration of hydrogen sulfide in the purified gas discharged after the adsorption was 0.
Through a period of absorption, purify the filtering layer and reach the absorption saturation, the utility model discloses it is right to use the regeneration liquid the saturated purification filtering layer that adsorbs sprays, purify the filtering layer and carry out next round absorption after spraying regeneration.
In addition, although the purification filter layer adopts an intermittent regeneration mode, the purification filter layer can actually adopt two modes of stop regeneration and non-stop regeneration; the non-stop regeneration is that the fan is not stopped in the regeneration process, and waste gas still passes through the purification unit, and regeneration liquid sprays the filter bed simultaneously, because the spouting of regeneration liquid in the filter bed, the filtration resistance of purification unit increases, and the amount of wind can reduce 20 ~ 50%, only can lead to temporary treatment tolerance to reduce, but export gas concentration still keeps 0. This is because the fibre in the utility model discloses a better water conservancy diversion performance has, and the regeneration liquid can spread out very fast in getting into the fibre, regenerates the fibre, and the regeneration liquid after the reaction also can flow into the regeneration liquid storage tank very fast simultaneously, makes purification unit filtration resistance reduce to resume normal processing tolerance.
In actual production, a hydrogen sulfide concentration monitoring system can be additionally installed according to actual needs and used for dynamically monitoring the concentration of hydrogen sulfide in the exhaust gas after adsorption, variable regeneration intervals are adopted according to outlet concentration, and the spraying time of the regenerated liquid, the adding amount of hydrogen peroxide and the adding amount of alkali liquor are adjusted by integrating the treatment amount of hydrogen sulfide, so that the purposes of accurate treatment and further cost saving are achieved; or when the treatment capacity and concentration of the hydrogen sulfide in the pollution source, namely the hydrogen sulfide waste gas, are stable, a fixed regeneration interval can be set, and regeneration spraying is carried out at a fixed time interval.
The utility model discloses in, regeneration liquid is preferred sodium hydroxide solution and/or sodium carbonate solution, regeneration liquid's mass concentration is preferred 0.5 ~ 5%, more preferably 1 ~ 4%, and most preferably 2 ~ 3%, specific in the embodiment of the utility model, can be 0.5%, 3% or 5%. The regeneration liquid spraying is intermittent spraying, and the spraying time point is that after each adsorption is finished, the time for each spraying is preferably 0.5-5 min, more preferably 1-4 min, and most preferably 2-3 min.
Contain the sulphide in the regeneration liquid after spraying, the utility model discloses preferably add hydrogen peroxide in the regeneration liquid after spraying, react with sulphide wherein, eliminate the secondary pollution that sulphide released the sulphide once more and brought in the regeneration liquid, simultaneously, can not bring secondary pollution to the regeneration liquid, guarantee that the fibrous structure who purifies the filtering layer in the cyclic use process of regeneration liquid is not destroyed, prolonged the life who purifies the filtering layer.
In the present invention, the molar ratio of the hydrogen peroxide to the adsorbed hydrogen sulfide is preferably (3-5): 1, and more preferably 4: 1. The utility model discloses preferably use the pump to carry out the backward flow stirring to the regeneration liquid that adds hydrogen peroxide, make its abundant reaction.
The utility model provides a treatment device of high-concentration hydrogen sulfide gas, which comprises a hydrogen peroxide spraying system, a dust removal device and a purification unit which are communicated in sequence; the purification unit comprises purification equipment, a regeneration liquid storage tank, a regeneration liquid spraying system and a hydrogen peroxide adding system; a regenerated liquid storage tank is arranged below the purifying equipment, a regenerated liquid spraying system is arranged above the purifying equipment, and the regenerated liquid storage tank is communicated with the regenerated liquid spraying system through a pipeline; the purification equipment comprises a plurality of layers of purification filter layers, wherein the plurality of layers of purification filter layers are arranged in parallel, gaps are formed between adjacent filter layers to form a plurality of parallel gas channels, and the hydrogen sulfide waste gas is introduced into the gas channels in parallel; in any two adjacent gas channels, the gas inlet of one gas channel is sealed, and the gas outlet of the other gas channel is sealed; and the hydrogen peroxide adding system is used for conveying hydrogen peroxide to the regeneration liquid storage tank. The utility model discloses at first through the hydrogen peroxide spraying system who uses hydrogen peroxide as spraying liquid, then carry out dust collector and detach the sulphur simple substance that is taken out by hydrogen peroxide spraying system, get into at last and use basic ion exchange fiber non-woven fabrics (the fibrous surface contains groups such as amido, quaternary ammonium group or pyridyl) as the ion exchange fiber purification unit who purifies the filtering layer. The waste gas containing hydrogen sulfide penetrates through the purification filter layer and is adsorbed and purified to achieve near zero emission, the purification filter layer with saturated adsorption is sprayed by regeneration liquid to be regenerated to carry out next round of adsorption, a certain amount of hydrogen peroxide is added into the sprayed alkali liquor, the sulfide and the hydrogen peroxide are fully reacted in a pump backflow stirring mode, secondary pollution caused by release of the hydrogen sulfide from the regeneration liquid is eliminated, and meanwhile, the deep purification effect of the hydrogen sulfide gas is guaranteed. Additionally, the utility model discloses a hydrogen peroxide's addition, the fibrous structure that can protect the purification filtering layer does not receive destruction, has effectively prolonged the life who purifies the filtering layer.
The utility model provides a processing apparatus easy operation requires the lower to operating condition such as the sealed of equipment, pressure, and operating stability is good, because the utility model provides an intermittent type regeneration technology, the utility model discloses an equipment can park at any time, and area is little.
Example 1
The concentration of hydrogen sulfide in the hydrogen sulfide waste gas is 200ppm, the concentration of hydrogen sulfide is reduced to 20ppm after the gas is sprayed by 5% (mass fraction) of hydrogen peroxide, and the gas enters an ion exchange fiber purification unit after passing through a dust removal device.
Adopts an ion exchange fiber purification filter layer with surface functional groups as amino groups, and the air quantity is controlled to be 1000m3And h, the air speed of the air passing through the purification filter layer is 5 m/min. The concentration of the purified gas is 0ppm within 25min after the adsorption; opening a regeneration liquid spray pump, and spraying a 3% sodium carbonate solution for regeneration for 3 min; after spraying is finished, adding hydrogen peroxide according to the mol ratio of the hydrogen peroxide to the adsorbed total hydrogen sulfide of 3: 1, and refluxing and stirring for 15 min; after repeating the steps for 15 times, the concentration of the purified gas is still kept to be 0ppm through detection, and the concentration of hydrogen sulfide in the air above the saturated spray liquid of the hydrogen peroxide spray system is less than 0.01 ppm.
Under the same condition, a sodium hydroxide solution spraying process is used, hydrogen peroxide is not added into the regeneration liquid of the ion exchange fiber filter, the concentration of hydrogen sulfide in the air above the saturated spraying liquid reaches 10-40ppm, and after the process is repeated for 8 times, the concentration of the terminal purified gas is detected to be 0.04-0.15 ppm.
Example 2
The concentration of hydrogen sulfide in the hydrogen sulfide waste gas is 500ppm, the concentration of hydrogen sulfide is reduced to 70ppm after the gas is sprayed by 20% (mass fraction) of hydrogen peroxide, and the gas enters an ion exchange fiber purification unit after passing through a dust removal device.
The air quantity is controlled at 500 by adopting an ion exchange fiber purifying filter layer with an amino surface functional groupm3The air speed of the air passing through the purification filter layer is 2.5 m/min. The concentration of the purified gas is 0ppm within 20min after the adsorption; opening a regeneration liquid spray pump, and spraying 5% sodium hydroxide solution for regeneration for 1 min; after spraying is finished, according to the mol ratio of the adsorbed total hydrogen sulfide to the adsorbed total hydrogen sulfide of 4: 1, adding hydrogen peroxide, and refluxing and stirring for 15 min; after repeating the steps for 15 times, the concentration of the purified gas is still kept to be 0ppm through detection, and the concentration of hydrogen sulfide in the air above the saturated spray liquid of the hydrogen peroxide spray system is less than 0.01 ppm.
Under the same condition, a sodium hydroxide solution spraying process is used, hydrogen peroxide is not added into the regeneration liquid of the ion exchange fiber filter, the concentration of hydrogen sulfide in the air above the saturated spraying liquid reaches 10-40ppm, and after the process is repeated for 8 times, the concentration of the terminal purified gas is detected to be 0.10-0.20 ppm.
Example 3
The concentration of hydrogen sulfide in the hydrogen sulfide waste gas is 1000ppm, the concentration of hydrogen sulfide is reduced to 50ppm after the gas is sprayed by 10% (mass fraction) of hydrogen peroxide, and the gas enters an ion exchange fiber purification unit after passing through a dust removal device.
The air quantity is controlled to be 100m by adopting an ion exchange fiber purifying filter layer with an amino surface functional group3The air speed of the air passing through the purification filter layer is 0.5 m/min. The concentration of the purified gas is 0ppm within 30min after the adsorption; opening a regeneration liquid spray pump, spraying 0.5% sodium hydroxide solution, and regenerating for 5 min; after spraying is finished, adding hydrogen peroxide according to the mol ratio of the hydrogen peroxide to the adsorbed total hydrogen sulfide of 5: 1, and refluxing and stirring for 20 min; after repeating the steps for 15 times, the concentration of the purified gas is still kept to be 0ppm through detection, and the concentration of hydrogen sulfide in the air above the saturated spray liquid of the hydrogen peroxide spray system is less than 0.01 ppm.
Under the same condition, a sodium hydroxide solution spraying process is used, hydrogen peroxide is not added into the regeneration liquid of the ion exchange fiber filter, the concentration of hydrogen sulfide in the air above the saturated spraying liquid reaches 10-40ppm, and after the process is repeated for 8 times, the concentration of the terminal purified gas is detected to be 0.08-0.21 ppm.
Comparative example 1
The concentration of hydrogen sulfide in the hydrogen sulfide waste gas is 500ppm, the concentration of hydrogen sulfide is reduced to 60ppm after the gas is sprayed by 30 percent (mass fraction) of hydrogen peroxide, and the gas enters an ion exchange fiber purification unit after passing through a dust removal device.
The air quantity is controlled at 500m by adopting an ion exchange fiber purifying filter layer with a pyridyl surface functional group3The air speed of the air passing through the purification filter layer is 2.5 m/min. The concentration of the purified gas is 0ppm within 25min after the adsorption; opening a regeneration liquid spray pump, and spraying 5% sodium hydroxide solution for regeneration for 1 min; after spraying is finished, adding hydrogen peroxide according to the mol ratio of the hydrogen peroxide to the adsorbed total hydrogen sulfide of 4: 1, and refluxing and stirring for 15 min; after repeating the above steps for 18 times, the concentration of the purified gas is still 0ppm through detection, and the concentration of hydrogen sulfide in the air above the saturated spray liquid of the hydrogen peroxide spray system is less than 0.01 ppm.
Under the same condition, a sodium hypochlorite solution spraying process is used, hydrogen peroxide is not added into the regenerated liquid of the ion exchange fiber filter, although the concentration of hydrogen sulfide in the air above the saturated spraying liquid is less than 1ppm, a large amount of chlorine (more than 50ppm) is introduced into the purified gas, the oxidation damage of the chlorine to the fiber structure seriously reduces the service life of the fiber, and the comprehensive cost is greatly increased; and because a large amount of sodium chloride is generated in the reaction, the saturation speed of the spray liquid is accelerated, the replacement frequency is increased, and the difficulty of recycling the spray liquid (such as sodium sulfate recovery by evaporation and crystallization of the spray liquid) is increased due to the existence of various salts in the spray liquid; and after repeating for 9 times, the concentration of the terminal purified gas is detected to be 0.10-0.20 ppm.
Comparative example 2
The concentration of hydrogen sulfide in the hydrogen sulfide waste gas is 500ppm, the concentration of hydrogen sulfide is reduced to 70ppm after the gas is sprayed by 20% (mass fraction) of hydrogen peroxide, and the gas enters an ion exchange fiber purification unit after passing through a dust removal device.
The air quantity is controlled at 500m by adopting an ion exchange fiber purifying filter layer with an amino surface functional group3The air speed of the air passing through the purification filter layer is 2.5 m/min. The concentration of the purified gas is 0ppm within 20min after the adsorption; opening a regeneration liquid spray pump, and spraying 5% sodium hydroxide solution for regeneration for 1 min; after spraying is finished, adding hypochlorous acid according to the mol ratio of the hypochlorous acid to the absorbed total hydrogen sulfide of 3: 1Refluxing and stirring sodium salt for 15 min; although the concentration of the hydrogen sulfide in the purified gas is still 0ppm after repeating the steps for 10 times, the chlorine is detected in the purified gas, so that secondary pollution of the gas is caused, and because the stability of the sodium hypochlorite in the strong alkaline solution is higher and the chemical reaction is limited by the concentration of the substrate, the sodium hypochlorite with lower concentration can exist in the regeneration liquid, the structure of the fiber can still be damaged in the long-term use process, the consumption of the adsorption filter layer is increased, and further the comprehensive cost is increased.
Claims (9)
1. A treatment device for high-concentration hydrogen sulfide gas comprises a hydrogen peroxide spraying system, a dust removal device and a purification unit which are sequentially communicated;
the purification unit comprises purification equipment, a regeneration liquid storage tank, a regeneration liquid spraying system and a hydrogen peroxide adding system;
a regenerated liquid storage tank is arranged below the purifying equipment, a regenerated liquid spraying system is arranged above the purifying equipment, and the regenerated liquid storage tank is communicated with the regenerated liquid spraying system through a pipeline;
the purification equipment comprises a plurality of layers of purification filter layers, wherein the plurality of layers of purification filter layers are arranged in parallel, gaps are formed between adjacent filter layers to form a plurality of parallel gas channels, and the hydrogen sulfide waste gas is introduced into the gas channels in parallel;
in any two adjacent gas channels, the gas inlet of one gas channel is sealed, and the gas outlet of the other gas channel is sealed;
and the hydrogen peroxide adding system is used for conveying hydrogen peroxide to the regeneration liquid storage tank.
2. The treatment apparatus of claim 1 wherein the hydrogen peroxide spray system is configured with a hydrogen peroxide storage tank for providing a hydrogen peroxide spray solution to the hydrogen peroxide spray system.
3. The treatment device of claim 1, wherein the hydrogen peroxide spraying system is provided with an air inlet at the bottom and an air outlet at the top.
4. The treatment apparatus according to claim 1, wherein the thickness of the filter layer is 1 to 10 mm.
5. The treatment device according to claim 1, wherein the width of the gap between the adjacent filter layers is 20-100 mm.
6. The treatment apparatus according to claim 1, wherein the number of the filter layers is 5 to 100.
7. The processing apparatus according to claim 1, wherein a regeneration liquid outlet is arranged at the bottom of the regeneration liquid storage tank, a regeneration liquid circulating stirring pump is arranged at the regeneration liquid outlet,
the regenerated liquid circulating stirring pump is provided with two outlets, one outlet is connected with the regenerated liquid spraying system and is used for conveying regenerated liquid to the regenerated liquid spraying system; and the other outlet is connected with a regeneration liquid return pipeline for returning the mixed liquid of the hydrogen peroxide and the regeneration liquid.
8. The processing apparatus as claimed in claim 1, wherein the hydrogen peroxide dosing system comprises a hydrogen peroxide storage tank and a hydrogen peroxide dosing pump;
the bottom of the hydrogen peroxide storage tank is provided with a hydrogen peroxide outlet, and the hydrogen peroxide outlet is provided with a hydrogen peroxide feeding pump for pumping the hydrogen peroxide in the hydrogen peroxide storage tank to the regeneration liquid storage tank.
9. The treatment device according to claim 1, wherein the purifying filter layer is a fiber or a non-woven fabric with a surface containing basic functional groups, and the basic functional groups are one or more of amine groups, quaternary ammonium groups and pyridyl groups.
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