CN106178848B - A kind of double-type landfill gas desulfurizer and method - Google Patents
A kind of double-type landfill gas desulfurizer and method Download PDFInfo
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- CN106178848B CN106178848B CN201610821270.8A CN201610821270A CN106178848B CN 106178848 B CN106178848 B CN 106178848B CN 201610821270 A CN201610821270 A CN 201610821270A CN 106178848 B CN106178848 B CN 106178848B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1468—Removing hydrogen sulfide
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
- C01B17/0452—Process control; Start-up or cooling-down procedures of the Claus process
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a kind of double-type landfill gas desulfurizers, and the content of H2S compares CO in landfill gas2And CH4It is less compared with content, available activated carbon adsorption and chemical oxidation LO-CAT technique under this double-type landfill gas sulfur removal technology, the desulfurizer is mainly by physical absorption and chemical oxidation two main lines road, physical absorption uses benign active carbon reusable 20~30 times, and elemental sulfur is precipitated using the retort gas in chemical oxidation process after activated carbon adsorption is complete；With absorption tower, regenerator, gas-liquid separator, filter, surge tank, electrolytic cell, destilling tower, strength of fluid tester and air-blaster etc. in chemical oxidation process.The invention discloses a kind of double-type landfill gas sulfur methods.The advantages of present invention has circulation sustainable, and Green-pollution is small, there is the output of elemental sulfur, saves energy, economic, adjustable selection of device route etc..
Description
Technical field
The present invention relates to landfill waste sulfur removal technology fields, and in particular to a kind of double-type landfill gas desulfurizer and
Method.
Background technique
Stench is only second to noise in 7 kinds of environmental hazards to harm caused by human body, occupies the 2nd.Therefore many states
Specific regulation is made to its emission limit in relevant laws and regulations by family.H2Main component one of of the S as foul gas,
In refuse landfill H2The content of S is related with the ingredient of landfill yard rubbish.When landfill has the construction material of plasterboard etc and contains
H when sulfate sludge, in landfill gas2S can be increased significantly.
Which kind of now consider that the practical technique of sulphide removal is gone to have very much, but select technology then to consider to fill the place in place
The case where condition and landfill gas, difficult point be should economy it is efficient again；Dry desulfurization can reach to H2The processing of S, together
When some methods can accomplish not will cause new pollution while desulfurization, but there may be elemental sulfur can not be recycled, more
Large labor intensity or consideration low efficiency do not use when changing desulfurizing agent.
Summary of the invention
The present invention has designed and developed a kind of double-type landfill gas desulfurizer, and object of the present invention is to solve the prior art
In can carry out simultaneously desulfurization operations by physisorption and chemisorption, reach recycling elemental sulfur, desulfurization efficiently,
The problem that low energy consumption, easily operated.
The present invention has designed and developed a kind of double-type landfill gas sulfur method, and goal of the invention of the invention is to solve
When carrying out desulfurization operations simultaneously by physisorption and chemisorption, make to mix according to different sulfurous gas concentration
Gas can distribute adjusting in two kinds of effects, reach reasonable desulfidation.
Technical solution provided by the invention are as follows:
A kind of double-type landfill gas desulfurizer, comprising:
Raw material gas tank；
Absorption tower, feed inlet are connected by the first valve with the raw material gas tank discharge port, and the absorption tower is also set up
Liquid outlet and recovered liquid import；
Regenerator is connected by gas-liquid separator with the liquid outlet on the absorption tower, and the regenerator passes through air
Air blower is connected with air tank, and the gas-liquid separator also sets up gas vent and liquid outlet；
Destilling tower, feed inlet are connected with the regenerator discharge port, and the destilling tower also sets up gas vent and liquid
Outlet；Wherein, the liquid outlet of the destilling tower is connected by the second valve with the recovered liquid import on the absorption tower；
Gas tank after first purification, is connected with the gas vent of the gas-liquid separator, gas after first purification
Tank has gas concentration thief hatch, connects the first concentration sensor；
Adsorption tower, feed inlet are connected with the raw material gas tank discharge port, and the adsorption tower also sets up gas vent；
Gas tank after second purification, is connected with the gas vent of the adsorption tower, and gas tank has after second purification
There is gas concentration thief hatch, connects the second concentration sensor；
Control device is sensed with first valve, first concentration sensor and second concentration respectively
Device is connected.
Preferably, further includes:
Surge tank, feed inlet are connected with the regenerator, and the surge tank also passes through gas-liquid delivering pump and chemistry
Product storage tank is connected；
Electrolytic cell, feed inlet are connected with the surge tank, and discharge port is connected with the destilling tower；
Wherein, the surge tank is also connected with filter, obtains elemental sulfur by the filter.
Preferably, strength of fluid tester, and described are additionally provided between the destilling tower and the absorption tower
Two valves are arranged between the strength of fluid tester and the absorption tower；
Wherein, the strength of fluid tester and second valve are connected with the control device respectively.
Preferably, further includes: active carbon restores tower, oxygen-containing with the gas vent and waste material of the destilling tower simultaneously
Hydrochlorate pond is connected.
Preferably, the adsorption tower be layering drawing and pulling type structure, from the bottom to top be respectively gravel layer, insulating layer and
Active carbon layer.
Preferably, the raw material gas tank is separately connected the absorption tower and the adsorption tower by gas-liquid delivering pump；
And
Humidifier is set between the gas-liquid delivering pump and the adsorption tower, in the gas-liquid delivering pump and described
First valve is set between absorption tower.
A kind of double-type landfill gas sulfur method, includes the following steps:
Step 1: opening raw material gas tank, the first valve and the second valve, mixed gas respectively enters absorption tower and suction
Attached tower；
Step 2: sulfurous gas is carried out absorption and separation by the absorbing liquid in absorption tower into absorption tower mixed gas
Afterwards, after by gas-liquid separator separates, purified gas enters gas tank after the first purification, and treated, and liquid passes through regeneration
Tower progress air oxidation obtains elemental sulfur and is recycled；And
Into adsorption tower mixed gas absorption desulfurization is carried out by the layered activated carbon in adsorption tower after, purified gas
Body enters gas tank after the second purification；
Step 3: by treated in the regenerator, liquid enters destilling tower, through destilling tower treated gas
It enters active carbon and restores tower, by the oxysalt of sulphur and sulphur suction belt from active carbon goes out to flow in active carbon hole after the completion of absorption
Enter waste material oxyacid salt pond, through destilling tower treated liquids recovery to absorption tower.
Preferably, in the step 2, sulfurous gas in the mixed gas after the raw material gas tank is opened is monitored
Concentration, the gas concentration of gas tank after acquisition is purified into gas tank after the first purification and second respectively, to first valve
Door aperture is controlled, the first valve opening λ1Calculation formula isFormula
In, CSFor the volumetric concentration of sulfurous gas in raw material gas tank mixed gas, C1It is dense for the gas volume in gas tank after the first purification
Degree, C2For the void fraction in gas tank after the second purification, T is the gas temperature at adsorption column outlet, and e is natural logrithm
The truth of a matter.
Preferably, in the step 3, to through ferric ion concentration in the destilling tower treated liquid into
Row monitoring, controls second valve opening, the second valve opening λ1Calculation formula isIn formula, CFe1For ferric ion mass concentration, C in absorption towerFe2For in liquid after destilling tower processing
Ferric ion mass concentration.
Preferably, in the step 3, to treated in the regenerator, liquid is electric by electrolytic cell progress
Destilling tower is entered back into after solution effect.
The present invention compared with prior art possessed by the utility model has the advantages that
1, the present invention closely combines dry desulfurization and wet desulphurization.In combination with simple, the warp of dry desulfurization
The advantages of Ji, the efficient, renewable of green non-pollution and wet desulphurization, treating capacity are big etc.；
2, traditional LO-CAT technique is improved, using electrolytic cell, ferric ion in acid condition with vulcanization
Hydrogen precursor reactant generates elemental sulfur, then solution after reaction is recycled by electrolytic regeneration, using yin in electrolytic process,
The electric current of anode, is constantly absorbed, and ferric ion can be continuously replenished plus part using addition chemical catalyst
Dioxygen oxidation ferric ion meets the efficiency requirements for the treatment of process；
3, the introducing of oxygen will lead to whole system and generate excessive water in regenerator, thus add a destilling tower and
One strength of fluid tester guarantees that concentration is suitable, and carries out flow to the liquid for returning to absorption tower by control device
Control；
It 4, can be to entering adsorption tower by control device in the present invention according to the sulfurous gas concentration in mixed gas
And sulfur-bearing mixed gas in absorption tower carries out reasonable distribution, and by the recycling to elemental sulfur, reached resource can
The advantages that recycling makes the present invention have Green-pollution small, saves energy, economic, and selection is adjusted in device route；
5, adsorption tower is made into box layering drawing and pulling type clothes closet sample in the present invention, this avoid the entirety for carrying out adsorption tower
Cleaning, layering cleaning replacement, so that adsorption tower service life is preferably extended, it is energy saving.
Detailed description of the invention
Fig. 1 is double-type landfill gas desulfurization process figure.
Fig. 2 is that box is layered drawing and pulling type adsorption tower positive sectional view.
Fig. 3 is that box is layered drawing and pulling type adsorption tower top view.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
As shown in Figure 1, the present invention provides a kind of double-type landfill gas desulfurizer, with simultaneously using physical absorption and
Chemical oxidation carries out desulfurization process, and physical absorption comparatively equipment simple economy, disadvantage occupied area is larger, chemical oxidation portion
Electrolytic cell is added point using improved LO-CAT technique ensure that ferrous ion is largely oxidized and meet the requirements, adds destilling tower
Ensure the concentration of ferric ion, air-blaster blasts the ferrous ion in air oxidation regenerator from air tank and can generate
A little water influences the reaction on absorption tower, can all be sampled using concentration after the hydrogen sulfide that two ways has purified in landfill exhaust gas
Mouth carries out the detection of hydrogen sulfide, it is ensured that qualification up to standard.
The present invention is mainly made of following major part: raw material gas tank 100, gas-liquid delivering pump 110,120, humidifier 310,
Gas tank 410, regenerator 230, air-blaster 231, air tank after absorption tower 210, gas-liquid separator 220, first purify
232, surge tank 240, filter 241, electrolytic cell 250, destilling tower 260, strength of fluid tester 261, chemical drum 242,
Waste material oxyacid salt pond 331, adsorption tower 320, screen 321, high grade activated carbon 322, the first concentration sensor 411, the second concentration
Sensor 421, active carbon restore tower 330, the first valve 510, the second valve 520 and control device；
Wherein, raw material gas tank 100, first purify after gas tank 410 and second purification after gas tank 420 belong to collection
Tank；Gas-liquid delivering pump 110,120, humidifier 310, waste material oxyacid salt pond 331, adsorption tower 320, screen 321, high grade activated carbon
322, active carbon recovery tower 330 belongs to physical absorption regenerative system；Absorption tower 210, gas-liquid separator 220, regenerator 230, sky
Enraged blower 231, air tank 232, surge tank 240, filter 241, electrolytic cell 250, destilling tower 260, strength of fluid tester
261, chemical drum 242 belongs to chemical oxidation system, is both provided with concentration sample tap in two big systems；First valve 510,
Two valves 520, the first concentration sensor 411, the second concentration sensor 421 and control device belong to control system, can be right
The desulfurization process of mixed gas is rationally controlled, and keeps the invention of this hair energy saving, economic and practical, sustainable use.
The feed inlet on absorption tower 210 is connected by the first valve 510 with the discharge port of raw material gas tank 100, and absorption tower 210 is also
Liquid outlet and recovered liquid import are set；Regenerator 230 is connected by gas-liquid separator 220 with the liquid outlet on absorption tower 210,
Regenerator 230 is connected by air-blaster 231 with air tank 232, and gas-liquid separator 220 also sets up gas vent and liquid discharge
Mouthful；The feed inlet of destilling tower 260 is connected with the discharge port of regenerator 230, and destilling tower 260 also sets up gas vent and liquid discharge
Mouthful；Wherein, the liquid outlet of destilling tower 260 is connected by the second valve 520 with the recovered liquid import on absorption tower 210；First is net
Gas tank 410 is connected with the gas vent of gas-liquid separator 220 after change, and gas tank 411 is adopted with gas concentration after the first purification
Sample mouth connects the first concentration sensor 411；The feed inlet of adsorption tower 320 is connected with 100 discharge port of raw material gas tank, adsorption tower
320 also set up gas vent；Gas tank 420 is connected with the gas vent of adsorption tower 320 after second purification, gas after the second purification
Tank 420 has gas concentration thief hatch, connects the second concentration sensor 421；Control device respectively with the first valve 510,
Two valves 520, the first concentration sensor 411 and the second concentration sensor 421 are connected.
In another embodiment, further includes:
The feed inlet of surge tank 240 is connected with regenerator 230, and surge tank 240 also by gas-liquid delivering pump 120 and is changed
Product storage tank 242 is connected；The feed inlet of electrolytic cell 250 is connected with surge tank 240, and discharge port is connected with destilling tower 260；Wherein,
Surge tank 240 is also connected with filter 241, obtains elemental sulfur after purification by filter 241；In the present embodiment, electricity is added
Solution pond 250 ensures that ferrous ion is largely oxidized and meets the requirements that addition destilling tower 260 ensures the concentration of ferric ion,
Air-blaster 231, which blasts the ferrous ion in air oxidation regenerator 230 from air tank 232, can generate a little water influence
The reaction on absorption tower 320.
In another embodiment, strength of fluid tester 261 is additionally provided between destilling tower 260 and absorption tower 210, and
And second valve 520 be arranged between strength of fluid tester 261 and absorption tower 210；Wherein, strength of fluid tester 261
And second valve 520 be connected respectively with control device, strength of fluid tester 261 can monitor destilling tower 260 processing liquid
The concentration of ferric ion in body, control device control opening for the second valve 520 by ferric ion concentration in liquid
Degree.
In another embodiment, further includes: active carbon restore tower 330 simultaneously with the gas vent of destilling tower 260 and
Waste material oxyacid salt pond 331 is connected；In the present embodiment, it has selected to utilize high grade activated carbon in numerous dry desulfurizing process
322 are used as desulfurizing agent, the reason is that the regeneration of high grade activated carbon 322 is simple, conveniently and adsorption capacity is stronger, after the completion of absorption,
Can also be restored with active carbon tower 330 using the resulting steam of destilling tower 260 by the oxysalt of sulphur and sulphur from the hole of active carbon
Desorption, which is taken out of, in gap flows into waste material oxyacid salt pond 331, obtains sulphur after the condensation of sulphur steam, is regenerated high grade activated carbon extensive
Multiple desulphurizing ability, active carbon best in quality can be recycled 20~30 times.
In another embodiment, raw material gas tank 100 is separately connected absorption tower 210 by gas-liquid delivering pump 110 and inhales
Attached tower 320；Humidifier 310 is set between gas-liquid delivering pump 110 and adsorption tower 320, in gas-liquid delivering pump 110 and is absorbed
First valve 510 is set between tower 210.
In another embodiment, as shown in Figure 2 and Figure 3, adsorption tower 320 is layering drawing and pulling type structure, is divided from the bottom to top
Not Wei gravel layer 320c, insulating layer 320e and active carbon layer 322, support 320a support adsorption tower 320, gas distributing system
320b enables mixed gas preferably to enter in adsorption tower 320, and support plate 320d provides supporting plane for inner layers, leads to
Extraction replacement can be carried out for every layer of the second adsorption tower 320 by crossing pull handle 320f, avoided and carried out the second adsorption tower 320
Whole cleaning.
The present invention also provides a kind of double-type landfill gas sulfur methods, closely by dry desulfurization and wet desulphurization
Combine, due to the concentration of the hydrogen sulfide gas in landfill gas be not it is very stable general, when concentration is lower, it is proposed that using dry
Method doctor treatment utilizes the suction-operated of high grade activated carbon, with the resulting hot water vapor of destilling tower in chemical oxidation after the completion of absorption
By the oxysalt of sulphur in hole and sulphur, suction belt goes out to flow into waste material oxyacid salt pond from high grade activated carbon, after the condensation of sulphur steam
To sulphur, active carbon is regenerated, and restores desulphurizing ability, and active carbon best in quality can be recycled 20~30 times；Work as concentration
When higher, chemisorption is completed using improved LO-CAT technique, the chemistry for completing to absorb hydrogen sulfide in absorption tower is made
With, rich solution has the regeneration method of twice selectivity after the landfill gas and absorption in gas-liquid separator after isolation of purified, first is that
Air oxidation can be carried out in regenerator, second is that electrolytic regeneration can be carried out in electrolytic cell.The introducing of oxygen in regenerator
It will lead to whole system and generate excessive water, so adding a destilling tower and a strength of fluid tester guarantee concentration conjunction
It is suitable.
Sulfur removal technology provided by the present invention, includes the following steps:
Step 1: opening raw material gas tank 100, the first valve 510 and the second valve 520, mixed gas respectively enters suction
Receive tower 210 and adsorption tower 320；
Step 2: hydrogen sulfide gas is carried out by the absorbing liquid in absorption tower 210 into 210 mixed gas of absorption tower
After absorption and separation, after being separated by gas-liquid separator 220, purified gas enters gas tank 410 after the first purification, after processing
Liquid air oxidation is carried out by regenerator 230 obtain elemental sulfur and recycled；And
Into adsorption tower 320 mixed gas absorption desulfurization is carried out by the layered activated carbon 322 in adsorption tower 320 after,
Purified gas enters gas tank 420 after the second purification；
Step 3: by treated in regenerator 230, liquid enters destilling tower 260, and through destilling tower 260, treated
Gas enter active carbon restore tower 330, by after the completion of absorption in active carbon hole the oxysalt of sulphur and sulphur from active carbon
Suction belt goes out to flow into waste material oxyacid salt pond 331, through destilling tower treated liquids recovery to absorption tower 210.
In another embodiment, in step 2, stink damp in the mixed gas after the monitoring unlatching of raw material gas tank 100
Body volumetric concentration CS, the gas concentration C of gas tank after acquisition is purified into gas tank after the first purification and second respectively1、C2,
Control device is to the first valve opening λ1It is controlled, the first valve opening λ1Calculation formula isIn formula, CSFor the volumetric concentration of sulfurous gas in raw material gas tank mixed gas,
Unit is ppm, C1For the void fraction in gas tank after the first purification, unit ppm, C2For gas tank after the second purification
In void fraction, unit ppm, T are the gas temperature at adsorption column outlet, and unit is DEG C that e is the bottom of natural logrithm
Number, the first valve opening λ1Unit is %.
In another embodiment, in step 3, to through ferric ion concentration in treated the liquid of destilling tower 260
CFe2It is monitored, by control device to the second valve opening λ2It is controlled, the second valve opening λ2Calculation formula isIn formula, CFe1For ferric ion mass concentration, C in absorption towerFe2It is in liquid after destilling tower processing three
Valence iron ion mass concentration, e are the truth of a matter of natural logrithm, the second valve opening λ2Unit is %.
In another embodiment, in step 3, to treated in regenerator 230, liquid passes through electrolytic cell 240
Destilling tower 260 is entered back into after carrying out electrolysis, the feed inlet of electrolytic cell 250 is connected with surge tank 240, discharge port and destilling tower
260 are connected；Wherein, surge tank 240 is also connected with filter 241, obtains elemental sulfur after purification by filter 241.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (4)
1. a kind of double-type landfill gas sulfur method, which comprises the steps of:
A kind of double-type landfill gas desulfurizer, comprising:
Raw material gas tank；
Absorption tower, feed inlet are connected by the first valve with the raw material gas tank discharge port, and the absorption tower also sets up liquid
Outlet and recovered liquid import；
Regenerator is connected by gas-liquid separator with the liquid outlet on the absorption tower, and the regenerator passes through air blast
Machine is connected with air tank, and the gas-liquid separator also sets up gas vent and liquid outlet；
Destilling tower, feed inlet are connected with the regenerator discharge port, and the destilling tower also sets up gas vent and liquid outlet；
Wherein, the liquid outlet of the destilling tower is connected by the second valve with the recovered liquid import on the absorption tower；
Gas tank after first purification, is connected with the gas vent of the gas-liquid separator, and gas tank has after first purification
There is gas concentration thief hatch, connects the first concentration sensor；
Adsorption tower, feed inlet are connected with the raw material gas tank discharge port, and the adsorption tower also sets up gas vent；
Gas tank after second purification, is connected with the gas vent of the adsorption tower, and gas tank has gas after second purification
Bulk concentration thief hatch connects the second concentration sensor；
Control device, respectively with first valve, first concentration sensor and the second concentration sensor phase
Even；
Surge tank, feed inlet are connected with the regenerator, and the surge tank also passes through gas-liquid delivering pump and chemicals stores up
Tank is connected；
Electrolytic cell, feed inlet are connected with the surge tank, and discharge port is connected with the destilling tower；
The surge tank is also connected with filter, obtains elemental sulfur by the filter；
The adsorption tower is layering drawing and pulling type structure, is from the bottom to top respectively gravel layer, insulating layer and active carbon layer；
Step 1: opening raw material gas tank, the first valve and the second valve, mixed gas respectively enters absorption tower and absorption
Tower；
Step 2: after sulfurous gas is carried out absorption and separation by the absorbing liquid in absorption tower, leading into absorption tower mixed gas
After crossing gas-liquid separator separates, purified gas enters gas tank after the first purification, treated liquid by regenerator into
Row air oxidation obtains elemental sulfur and is recycled；And
Into adsorption tower mixed gas absorption desulfurization is carried out by the layered activated carbon in adsorption tower after, purified gas into
Enter gas tank after the second purification；
Step 3: by treated in the regenerator, liquid enters destilling tower, enters through destilling tower treated gas
Restore tower to active carbon, by inflow is useless out for suction belt from active carbon for the oxysalt of sulphur and sulphur in active carbon hole after the completion of absorption
Oxyacid salt pond is expected, through destilling tower treated liquids recovery to absorption tower.
2. double-type landfill gas sulfur method as described in claim 1, which is characterized in that in the step 2, prison
Survey the concentration of sulfurous gas in the mixed gas after the raw material gas tank is opened, respectively acquisition enter after the first purification gas tank with
And second purification after gas tank gas concentration, first valve opening is controlled, the first valve opening λ1Meter
Calculating formula isIn formula, CSFor sulfurous gas in raw material gas tank mixed gas
Volumetric concentration, C1For the void fraction in gas tank after the first purification, C2For the gas body in gas tank after the second purification
Product concentration, T are the gas temperature at adsorption column outlet, and e is the truth of a matter of natural logrithm.
3. double-type landfill gas sulfur method as claimed in claim 2, which is characterized in that right in the step 3
It is monitored through ferric ion concentration in the destilling tower treated liquid, second valve opening is controlled,
The second valve opening λ2 Calculation formula isIn formula, CFe1For ferric ion quality in absorption tower
Concentration, CFe2For ferric ion mass concentration in liquid after destilling tower processing.
4. double-type landfill gas sulfur method as claimed in claim 3, which is characterized in that right in the step 3
Treated in the regenerator, and liquid enters back into destilling tower after electrolytic cell carries out electrolysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610821270.8A CN106178848B (en) | 2016-09-13 | 2016-09-13 | A kind of double-type landfill gas desulfurizer and method |
Applications Claiming Priority (1)
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