CN107281914A - The processing unit and method of a kind of regenerated flue gas - Google Patents
The processing unit and method of a kind of regenerated flue gas Download PDFInfo
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- CN107281914A CN107281914A CN201610207215.XA CN201610207215A CN107281914A CN 107281914 A CN107281914 A CN 107281914A CN 201610207215 A CN201610207215 A CN 201610207215A CN 107281914 A CN107281914 A CN 107281914A
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/73—After-treatment of removed components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/104—Oxygen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention discloses a kind of processing unit of regenerated flue gas and method, belong to industrial waste gas process field.The processing unit includes：Adjusting apparatus, data acquisition unit, acid gas control valve and the gas mixer being sequentially connected with, preheater, reactor, sulfur condenser, molten sulfur pond, tail gas hydrogenation device.The input of gas mixer is connected with regenerated flue gas feed-line and acid gas feed-line respectively, and acid gas control valve is arranged on acid gas feed-line；Data acquisition unit is arranged on the pipeline between gas mixer and preheater, the data for gathering hydrogen sulfide and oxygen content in gas mixer；The input of adjusting apparatus is electrically connected with data acquisition unit, and output end is electrically connected with acid gas control valve, the aperture for adjusting acid gas control valve according to data；The molten sulfur outlet of sulfur condenser is connected with molten sulfur pond, and offgas outlet is connected to tail gas hydrogenation device.The processing unit can remove sulfur dioxide and oxygen in regenerated flue gas, be prevented effectively from hydrogenation catalyst poisoning.
Description
Technical field
The present invention relates to industrial waste gas process field, the processing unit and method of more particularly to a kind of regenerated flue gas.
Background technology
It is one of main method of petrol and diesel oil desulfurization to adsorb desulfurization technology, and it in desulfurizing tower by adding adsorptive selectivity
Preferable and reproducible solid absorbent, the sulfide in petrol and diesel oil is removed using chemisorption, reduces the sulphur of petrol and diesel oil
Content.The solid absorbent wherein used, desulfurization regeneration processing can be carried out in regenerator, is made with carrying out circulation after use
With economizing on resources.But it is 4.5- to contain percentage by volume after solid absorbent is handled through desulfurization regeneration, in the regenerated flue gas of generation
6% sulfur dioxide, directly discharge can have undesirable effect to environment, so needing to arrange again after handling regenerated flue gas
Put.Therefore, it is necessary to provide the device and method that a kind of regenerated flue gas to petrol and diesel oil adsorption-desulfurization sorbent is handled.
Prior art is made by the way that regenerated flue gas is introduced directly into tail gas hydrogenation processing unit by hydrogenation catalyst therein
Sulfur dioxide in regenerated flue gas reacts with the hydrogen in tail gas hydrogenation processing unit, generation sulphur and water, so as to remove
Sulfur dioxide in regenerated flue gas, and realize the recovery of sulphur.
Inventor has found that prior art at least has following technical problem：
Due to also containing oxygen in regenerated flue gas, regenerated flue gas is introduced directly into by tail gas hydrogenation processing dress by prior art
Postpone, with hydrogen therein exothermic reaction can occur for oxygen, cause in tail gas hydrogenation processing unit that temperature is too high, make hydrogenation catalyst
Agent is poisoned, so as to have impact on the desulfurized effect of tail gas hydrogenation processing unit.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is that there is provided a kind of titanium dioxide that can be removed in regenerated flue gas
Sulphur and oxygen and the processing unit and method for being prevented effectively from the regenerated flue gas that hydrogenation catalyst is poisoned, concrete technical scheme are as follows：
In a first aspect, the embodiments of the invention provide a kind of processing unit of regenerated flue gas, the processing unit includes：Regulation
Instrument, data acquisition unit, acid gas control valve and the gas mixer being sequentially connected with, preheater, reactor, sulfur condenser, molten sulfur
Pond, tail gas hydrogenation device；The sulfur condenser includes：Sulfurous gas entrance, molten sulfur outlet, offgas outlet.
The input of the gas mixer is connected with regenerated flue gas feed-line and acid gas feed-line respectively, the acid
Gas control valve is arranged on the acid gas feed-line；The data acquisition unit is arranged on the gas mixer and the preheating
On pipeline between device, the data for gathering hydrogen sulfide and oxygen content in the gas mixer；The adjusting apparatus it is defeated
Enter end to electrically connect with the data acquisition unit, output end is electrically connected with the acid gas control valve, for being adjusted according to the data
Save the aperture of the acid gas control valve；The sulfurous gas entrance is connected with the outlet of the reactor, molten sulfur outlet with
The molten sulfur pond connection, the offgas outlet is connected to the tail gas hydrogenation device.
Specifically, preferably, the reactor is fixed bed reactors.
Specifically, preferably, the fixed bed reactors are deoxidation-claus reaction device, the deoxidation-Crouse is anti-
A diameter of 15-25cm of device is answered, is highly 90-110cm.
Specifically, preferably, the reactor bottom is provided with sieve plate, the sieve plate is provided with from the bottom to top successively
Lower porcelain layers of balls, hydrodesulfurisation catalyst layer, the upper porcelain layers of balls being in contact.
Specifically, preferably, being filled with titanium-based sulfur catalyst in the hydrodesulfurisation catalyst layer.
Second aspect, is entered the embodiments of the invention provide a kind of using the processing unit of the regenerated flue gas to regenerated flue gas
The method of row processing, comprises the following steps：
First, from acid gas feed-line and the cleaning acid gas of acid gas control valve will be flowed through and from regenerated flue gas delivery pipe
The regenerated flue gas of line is passed through gas mixer, obtains mixed gas, the mixed gas is flowed into preheater and carries out the pre-heat treatment,
Then reactor is passed through again and carries out deoxidization desulfuration processing, deoxidization desulfuration gas is obtained, and then enters the deoxidization desulfuration gas
Sulfur condenser carries out sulfur recovery processing, obtains molten sulfur and uncooled tail gas, the molten sulfur is flowed into molten sulfur pond, the uncooled tail
Gas enters tail gas hydrogenation device and carries out secondary desulfuration processing.
In above process, the data of hydrogen sulfide and oxygen content in the mixed gas are gathered by data acquisition unit,
The data are analyzed by adjusting apparatus, the molar ratio of the hydrogen sulfide and the oxygen is obtained, then according to described
The aperture of the acid gas control valve is adjusted ratio, so that hydrogen sulfide described in the mixed gas and the oxygen rub
You are maintained at (3-8) ratio: 1.
Specifically, preferably, the operating temperature of the preheater is 190 DEG C -210 DEG C.
Specifically, preferably, the operating temperature of the reactor is 200 DEG C -450 DEG C, air speed is 1000-3000h-1。
Specifically, preferably, the operating temperature of the sulfur condenser is 140 DEG C -160 DEG C.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
The processing unit of regenerated flue gas provided in an embodiment of the present invention, makes regenerated flue gas and cleaning acid by gas mixer
Gas is mixed, and the data of hydrogen sulfide and oxygen content in the mixed gas of gas mixer are carried out by data acquisition unit
The data collected are analyzed by collection by adjusting apparatus, and the opening degree of acid gas regulating valve is controlled, so that right
The mol ratio of hydrogen sulfide and oxygen in gas mixer is adjusted, it is ensured that reaction raw materials are supplied in proper proportions,
To improve the reaction efficiency of follow-up deoxidization desulfuration.By being preheated to mixed gas, deoxidization desulfuration processing is then carried out, makes to mix
The most of oxygen and a part of sulphur closed in gas is removed, so as to avoid regenerated flue gas from making hydrogenation when entering tail gas hydrogenation device
Catalyst poisoning, it is ensured that the quality of tail gas hydrogenation.Sulfur recovery processing is carried out to the gas after deoxidization desulfuration by sulfur condenser, will
Condense obtained molten sulfur and introduce molten sulfur pond, the gas not being condensed is entered tail gas hydrogenation device, it is ensured that in the gas not being condensed
The oxygen concentration contained is less than 600ppm, so as to improve the effect that the gas that is not condensed carries out secondary desulfuration in tail gas hydrogenation device
Really.It can be seen that, the processing unit of regenerated flue gas provided in an embodiment of the present invention can remove the sulfur dioxide and oxygen in regenerated flue gas
Gas, is prevented effectively from hydrogenation catalyst poisoning, and easy to operate, is easy to large-scale promotion application.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the processing device structure diagram of regenerated flue gas provided in an embodiment of the present invention.
Reference is represented respectively：
1 adjusting apparatus,
2 data acquisition units,
3 acid gas control valves,
4 gas mixers,
5 preheaters,
6 reactors,
7 sulfur condensers,
8 molten sulfur ponds,
9 tail gas hydrogenation devices,
10 regenerated flue gas feed-lines,
11 acid gas feed-lines.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention will be made into one below
It is described in detail on step ground.
In a first aspect, as shown in Figure 1, the embodiments of the invention provide a kind of processing unit of regenerated flue gas, the processing
Device includes：It is adjusting apparatus 1, data acquisition unit 2, acid gas control valve 3 and the gas mixer 4 being sequentially connected with, preheater 5, anti-
Answer device 6, sulfur condenser 7, molten sulfur pond 8, tail gas hydrogenation device 9；Sulfur condenser 7 includes：Sulfurous gas entrance, molten sulfur outlet, tail gas
Outlet.
The input of gas mixer 4 is connected with regenerated flue gas feed-line 10 and acid gas feed-line 11 respectively, acid gas
Control valve 3 is arranged on acid gas feed-line 11；Data acquisition unit 2 is arranged on the pipeline between gas mixer 4 and preheater 5
On, the data for gathering hydrogen sulfide and oxygen content in gas mixer 4；The input of adjusting apparatus 1 and the electricity of data acquisition unit 2
Connection, output end is electrically connected with acid gas control valve 3, the aperture for adjusting acid gas control valve 3 according to data；Sulfurous gas enters
Mouth is connected with the outlet of reactor 6, and molten sulfur outlet is connected with molten sulfur pond 8, and offgas outlet is connected to tail gas hydrogenation device 9.
The processing unit of regenerated flue gas provided in an embodiment of the present invention, makes regenerated flue gas and cleaning by gas mixer 4
Acid gas is mixed, and passes through data of the data acquisition unit 2 to hydrogen sulfide and oxygen content in the mixed gas of gas mixer 4
It is acquired, is analyzed by 1 pair of data collected of adjusting apparatus, and the opening degree of acid gas regulating valve is controlled,
So as to be adjusted to the hydrogen sulfide and the mol ratio of oxygen in gas mixer 4, it is ensured that reaction raw materials enter in proper proportions
Row supply.By being preheated to mixed gas, then carry out deoxidization desulfuration processing, make most of oxygen in mixed gas with
And a part of sulphur is removed, so as to avoid regenerated flue gas from hydrogenation catalyst is poisoned when entering tail gas hydrogenation device 9, it is ensured that tail gas adds
The quality of hydrogen.Sulfur recovery processing is carried out to the gas after deoxidization desulfuration by sulfur condenser 7, the molten sulfur that condensation is obtained introduces liquid
Sulphur pond 8, the tail gas that makes not to be condensed is into tail gas hydrogenation device 9, it is ensured that the oxygen concentration contained in tail gas that is not condensed is less than
600ppm, so as to improve the effect that the tail gas that is not condensed carries out secondary desulfuration in tail gas hydrogenation device 9.It can be seen that, the present invention is implemented
What example was provided is applied to the processing unit that petrol and diesel oil adsorbs desulfurization regeneration flue gas, can remove the sulfur dioxide and oxygen in regenerated flue gas
Gas, is prevented effectively from hydrogenation catalyst poisoning, and easy to operate, is easy to large-scale promotion application.
Specifically, reactor 6 is fixed bed reactors 6, wherein solid catalyst is filled with, to realize heterogeneous reaction mistake
Journey.Solid catalyst can be piled into certain altitude, and bed remains stationary is motionless, is reacted with enabling flow through bed.More
In detail, the processing unit of regenerated flue gas provided in an embodiment of the present invention, can select deoxidation-claus reaction device 6, its diameter
It is highly 90-110cm for 15-25cm.The bottom of reactor 6 is provided with to be provided with sieve plate, sieve plate to connect successively from the bottom to top
Tactile lower porcelain layers of balls, hydrodesulfurisation catalyst layer, upper porcelain layers of balls.Porcelain ball has high temperature high voltage resistant, and water absorption rate is low, stable chemical performance
Feature.The corrosion of acid, alkali and other organic solvents is amenable to, and is amenable to the temperature change that occurs in production process.Reactor 6
In upper porcelain layers of balls covering protection effect is played to catalyst, and lower porcelain layers of balls is then supported to catalyst, makes to enter reaction
The gas of device 6 is fully contacted when flowing through catalyst layer with catalyst, so that the oxygen in regenerated flue gas is consumed, is removed
Go and the sulphur in reclaiming flue gas.
Specifically, titanium-based sulfur catalyst is filled with hydrodesulfurisation catalyst layer.Titanium-based sulfur catalyst has with good
Machine sulphur hydrolysing activity, deoxy performance, sulfuric-resisting salinization performance and excellent activity stability, can make the vulcanization in cleaning acid gas
Hydrogen fully reacts with the oxygen in regenerated flue gas, oxygen content in the regenerated flue gas after processing is down to below 600ppm, deoxidation
Rate is up to more than 95%.Meanwhile, in the presence of titanium-based sulfur catalyst, when hydrogen sulfide is with oxygen reaction, first generate titanium dioxide
Sulphur and water, then, hydrogen sulfide generate sulphur and water with sulfur dioxide reaction again, and due to also containing sulfur dioxide in regenerated flue gas,
So as to being greatly reduced by deoxidation-claus reaction device 6 sulfur dioxide and oxygen content in regenerated flue gas, it is to avoid tail gas
The intoxicating phenomenon of hydrogenation catalyst, it is ensured that the processing quality of regenerated flue gas.
Second aspect, the embodiment of the present invention additionally provides a kind of method handled regenerated flue gas, including following step
Suddenly：
First, from acid gas feed-line 11 and the cleaning acid gas of acid gas control valve 3 will be flowed through and defeated from regenerated flue gas
Send the regenerated flue gas of pipeline 10 to be passed through gas mixer 4, obtain mixed gas, mixed gas is flowed into preheater 5 and preheated
Processing, is then passed through reactor 6 and carries out deoxidization desulfuration processing, obtain deoxidization desulfuration gas, then enter deoxidization desulfuration gas again
Enter sulfur condenser 7 and carry out sulfur recovery processing, obtain molten sulfur and uncooled tail gas, molten sulfur is flowed into molten sulfur pond 8, uncooled tail gas enters
Enter tail gas hydrogenation device 9 and carry out secondary desulfuration processing.
In above process, the data of hydrogen sulfide and oxygen content in mixed gas are gathered by data acquisition unit 2, are passed through
Adjusting apparatus 1 is analyzed data, the ratio of hydrogen sulfide and oxygen quality is obtained, then according to ratio to acid gas control valve 3
Aperture is adjusted, so that the mol ratio of hydrogen sulfide and oxygen is maintained at (3-8) in mixed gas: 1.
Specifically, cleaning acid gas is typically from the tail gas of claus reaction, and it mainly includes hydrogen sulfide and sulfur dioxide.
And then contain N in regenerated flue gas2、CO2、O2、H2O、SO2, CO etc., wherein N2Volume fraction be about 86%, CO2Volume fraction
About 2%, H2O volume fraction is about 3%, SO2Volume fraction fluctuated in the range of 4.5~6%, O2Volume fraction
Fluctuated in the range of 0.15~2.1%.After cleaning acid gas is mixed with regenerated flue gas, heated by preheater 5, then anti-
Answer and reacted in device 6, then the sulphur produced to reaction is collected, and secondary desulfuration is carried out finally by tail gas hydrogenation device 9, with
Ensure the qualified discharge of regenerated flue gas.In reactor 6, the oxygen reaction in hydrogen sulfide and regenerated flue gas in cleaning acid gas,
So as to remove the oxygen in regenerated flue gas, it is to avoid excessive oxygen makes the hydrogenation catalyst in tail gas hydrogenation device 9 be poisoned.Meanwhile,
SO in regenerated flue gas2It can also be reacted with hydrogen sulfide, obtain the sulfur content in sulphur and water, reduction regenerated flue gas.
Specifically, the air speed in reactor 6 should be controlled in 1000-3000h-1In the range of, such as 1000h-1、2000h-1、
3000h-1It it is 200 DEG C -450 DEG C Deng, reaction temperature, such as 200 DEG C, 300 DEG C, 400 DEG C, 450 DEG C.In order to ensure deoxidation-gram
In Louth reactor 6, the progress of hydrogen sulfide and oxygen reaction is, it is necessary to control the mol ratio of hydrogen sulfide and oxygen.Adopted by data
Storage 2 can be collected to the qualitative data of hydrogen sulfide and oxygen, and reached adjusting apparatus 1 and analyzed, can be by regulation
The setting of instrument 1, makes adjusting apparatus 1 that the opening degree of acid gas control valve 3 is adjusted, so that the mol ratio of hydrogen sulfide and oxygen
It is maintained at (3-8): 1, for example, 3: 1,4: 1,6: 1,8: 1 etc., to ensure that reaction raw materials are supplied in proper proportions.
Specifically, preheater 5 be used for the hydrogen sulfide and oxygen of question response are promoted to predetermined temperature, in order to react into
OK, wherein, the operating temperature of preheater 5 is 190 DEG C -210 DEG C, for example, 190 DEG C, 200 DEG C, 210 DEG C etc..
Specifically, when carrying out condensation and reclaiming, the operating temperature of sulfur condenser is 140 DEG C -160 DEG C, for example, 140 DEG C, 150
DEG C, 160 DEG C etc., to isolate sulphur and be reclaimed.
It will be described in detail below by specific embodiment：
Embodiment 1
A kind of processing unit of regenerated flue gas is present embodiments provided, the processing unit includes：Adjusting apparatus 1, data acquisition
Device 2, acid gas control valve 3 and the gas mixer 4 being sequentially connected with, preheater 5, deoxidation-claus reaction device 6, sulfur condenser
7th, molten sulfur pond 8, tail gas hydrogenation device 9.Wherein, sulfur condenser 7 includes：Sulfurous gas entrance, molten sulfur outlet, offgas outlet.
The input of gas mixer 4 is connected with regenerated flue gas feed-line 10 and acid gas feed-line 11 respectively, acid gas
Control valve 3 is arranged on acid gas feed-line 11；Data acquisition unit 2 is arranged on the pipeline between gas mixer 4 and preheater 5
On, the content for gathering hydrogen sulfide and oxygen in gas mixer 4；The input of adjusting apparatus 1 is electrically connected with data acquisition unit 2
Connect, output end is electrically connected with acid gas control valve 3, opening for acid gas control valve 3 is adjusted for the content according to hydrogen sulfide and oxygen
Degree；Sulfurous gas entrance is connected with the outlet of deoxidation-claus reaction device 6, and molten sulfur outlet is connected with molten sulfur pond 8, offgas outlet
It is connected to tail gas hydrogenation device 9.
Wherein, a diameter of 20cm of deoxidation-claus reaction device 6, is highly 100cm, bottom is provided with sieve plate, sieve plate
The lower porcelain layers of balls being in contact successively from the bottom to top, CT6-8 type titanium-baseds sulfur catalyst layer, upper porcelain layers of balls are provided with, it is total to load height
Spend for 65cm, the height of upper porcelain layers of balls and lower porcelain layers of balls is 10cm.
Embodiment 2
A kind of method that processing unit using in embodiment 1 is handled regenerated flue gas is present embodiments provided, is wrapped
Include following steps：
First, from acid gas feed-line 11 and the cleaning acid gas of acid gas control valve 3 will be flowed through and defeated from regenerated flue gas
Send the regenerated flue gas of pipeline 10 to be passed through gas mixer 4, obtain mixed gas, mixed gas is flowed into preheater 5, at 190 DEG C
Carry out the pre-heat treatment.Then deoxidation-claus reaction device 6 is passed through again carries out deoxidization desulfuration processing, deoxidation-claus reaction device 6
In air speed be 1500h-1, reaction temperature is 238 DEG C, obtains deoxidization desulfuration gas.Then deoxidization desulfuration gas is made to enter sulphur cold
Condenser 7, carries out sulfur recovery processing at 140 DEG C, obtains molten sulfur and uncooled tail gas, molten sulfur is flowed into molten sulfur pond 8, uncooled tail gas
Secondary desulfuration processing is carried out into tail gas hydrogenation device 9.
In above process, the data of hydrogen sulfide and oxygen content in mixed gas are gathered by data acquisition unit 2, are passed through
Adjusting apparatus 1 is analyzed data, the ratio of hydrogen sulfide and oxygen quality is obtained, then according to ratio to acid gas control valve 3
Aperture is adjusted, so that the mol ratio of hydrogen sulfide and oxygen is maintained at 3.5: 1 in mixed gas.
To being measured by the gas constituent before and after deoxidation-claus reaction device 6, specific data are as shown in table 1.
Gas constituent contrast table before and after 1 deoxidation of table-claus reaction
Wherein, (or after reaction) percentage, such as SO before the reaction described in table 12(or after reaction) institute before reaction
Account for percentage to refer to before deoxidation-claus reaction is carried out (or afterwards), SO2Volume account for deoxidation-claus reaction device 6
The percentage of middle volume of gas.It can be seen from Table 1 that, after deoxidation-claus reaction device 6, the hydrogen sulfide in gas
Declined to a great extent with oxygen content, content of sulfur dioxide also has a certain degree of reduction, illustrate the present embodiment provide to regeneration cigarette
The method that gas is handled can reduce the content of oxygen and sulfur dioxide in regenerated flue gas, so that regenerated flue gas is passed through tail gas
When hydrotreater 9 carries out hydrotreating, hydrogenation catalyst will not be made to be poisoned, so as to improve desulfurized effect.
Embodiment 3
A kind of method that processing unit using in embodiment 1 is handled regenerated flue gas is present embodiments provided, is wrapped
Include following steps：
First, from acid gas feed-line 11 and the cleaning acid gas of acid gas control valve 3 will be flowed through and defeated from regenerated flue gas
Send the regenerated flue gas of pipeline 10 to be passed through gas mixer 4, obtain mixed gas, mixed gas is flowed into preheater 5, at 200 DEG C
Carry out the pre-heat treatment.Then deoxidation-claus reaction device 6 is passed through again carries out deoxidization desulfuration processing, deoxidation-claus reaction device 6
In air speed be 2000h-1, reaction temperature is 422 DEG C, obtains deoxidization desulfuration gas.Then deoxidization desulfuration gas is made to enter sulphur cold
Condenser 7, carries out sulfur recovery processing at 140 DEG C, obtains molten sulfur and uncooled tail gas, molten sulfur is flowed into molten sulfur pond 8, uncooled tail gas
Secondary desulfuration processing is carried out into tail gas hydrogenation device 9.
In above process, the data of hydrogen sulfide and oxygen content in mixed gas are gathered by data acquisition unit 2, are passed through
Adjusting apparatus 1 is analyzed data, the ratio of hydrogen sulfide and oxygen quality is obtained, then according to ratio to acid gas control valve 3
Aperture is adjusted, so that the mol ratio of hydrogen sulfide and oxygen is maintained at 3.86: 1 in mixed gas.
To being measured by the gas constituent before and after deoxidation-claus reaction device 6, specific data are as shown in table 2.
Gas constituent contrast table before and after 2 deoxidations of table-claus reaction
Wherein, (or after reaction) percentage, such as SO before the reaction described in table 22(or after reaction) institute before reaction
Account for percentage to refer to before deoxidation-claus reaction is carried out (or afterwards), SO2Volume account for deoxidation-claus reaction device 6
The percentage of middle volume of gas.It can be seen from Table 2 that, after deoxidation-claus reaction device 6, the hydrogen sulfide in gas
Declined to a great extent with oxygen content, content of sulfur dioxide also has a certain degree of reduction, illustrate the present embodiment provide to regeneration cigarette
The method that gas is handled can reduce the content of oxygen and sulfur dioxide in regenerated flue gas, so that regenerated flue gas is passed through tail gas
When hydrotreater 9 carries out hydrotreating, hydrogenation catalyst will not be made to be poisoned, so as to improve desulfurized effect.
Presently preferred embodiments of the present invention is the foregoing is only, the protection domain being not intended to limit the invention is all in this hair
Within bright spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in protection scope of the present invention
Within.
Claims (9)
1. a kind of processing unit of regenerated flue gas, it is characterised in that the processing unit includes：Adjusting apparatus, data acquisition unit, acid
Gas control valve and the gas mixer being sequentially connected with, preheater, reactor, sulfur condenser, molten sulfur pond, tail gas hydrogenation device；Institute
Stating sulfur condenser includes：Sulfurous gas entrance, molten sulfur outlet, offgas outlet；
The input of the gas mixer is connected with regenerated flue gas feed-line and acid gas feed-line respectively, the acid gas control
Valve processed is arranged on the acid gas feed-line；The data acquisition unit be arranged on the gas mixer and the preheater it
Between pipeline on, the data for gathering hydrogen sulfide and oxygen content in the gas mixer；The input of the adjusting apparatus
Electrically connected with the data acquisition unit, output end is electrically connected with the acid gas control valve, for according to the data to adjust
State the aperture of acid gas control valve；The sulfurous gas entrance is connected with the outlet of the reactor, molten sulfur outlet with it is described
Molten sulfur pond is connected, and the offgas outlet is connected to the tail gas hydrogenation device.
2. processing unit according to claim 1, it is characterised in that the reactor is fixed bed reactors.
3. processing unit according to claim 2, it is characterised in that the fixed bed reactors are that deoxidation-Crouse is anti-
Device is answered, a diameter of 15-25cm of the deoxidation-claus reaction device is highly 90-110cm.
4. processing unit according to claim 2, it is characterised in that the reactor bottom is provided with sieve plate, the sieve
The lower porcelain layers of balls being in contact successively from the bottom to top, hydrodesulfurisation catalyst layer, upper porcelain layers of balls are provided with plate.
5. processing method according to claim 4, it is characterised in that titanium-based sulphur is filled with the hydrodesulfurisation catalyst layer
Catalyst.
6. the method handled using the processing unit described in claim 1 regenerated flue gas, is comprised the following steps：
First, from acid gas feed-line and the cleaning acid gas and from regenerated flue gas feed-line of acid gas control valve will be flowed through
Regenerated flue gas is passed through gas mixer, obtains mixed gas, the mixed gas is flowed into preheater and carries out the pre-heat treatment, then
Reactor is passed through again and carries out deoxidization desulfuration processing, deoxidization desulfuration gas is obtained, and the deoxidization desulfuration gas is entered sulphur cold
Condenser carries out sulfur recovery processing, obtains molten sulfur and uncooled tail gas, the molten sulfur is flowed into molten sulfur pond, and the uncooled tail gas enters
Enter tail gas hydrogenation device and carry out secondary desulfuration processing；
In above process, the data of hydrogen sulfide and oxygen content in the mixed gas are gathered by data acquisition unit, are passed through
Adjusting apparatus is analyzed the data, the molar ratio of the hydrogen sulfide and the oxygen is obtained, then according to the ratio
Aperture to the acid gas control valve is adjusted, so that the mol ratio of hydrogen sulfide described in the mixed gas and the oxygen
Value is maintained at (3-8): 1.
7. method according to claim 6, it is characterised in that the operating temperature of the preheater is 190 DEG C -210 DEG C.
8. method according to claim 7, it is characterised in that the operating temperature of the reactor is 200 DEG C -450 DEG C, empty
Speed is 1000-3000h-1。
9. method according to claim 8, it is characterised in that the operating temperature of the sulfur condenser is 140 DEG C -160 DEG C.
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Application publication date: 20171024 |