CN106268220A - A kind of benzene hydrogenation tail gas desulfurization device and sulfur removal technology thereof - Google Patents
A kind of benzene hydrogenation tail gas desulfurization device and sulfur removal technology thereof Download PDFInfo
- Publication number
- CN106268220A CN106268220A CN201610779359.2A CN201610779359A CN106268220A CN 106268220 A CN106268220 A CN 106268220A CN 201610779359 A CN201610779359 A CN 201610779359A CN 106268220 A CN106268220 A CN 106268220A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- waste water
- valve
- circulating pump
- tail gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B01D53/52—Hydrogen sulfide
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Gas Separation By Absorption (AREA)
- Industrial Gases (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a kind of benzene hydrogenation tail gas desulfurization device and sulfur removal technology thereof.This benzene hydrogenation tail gas desulfurization device includes desulfurizing tower, sulfur dioxide hold-up tank, waste water storage tank, waste water pump, the first circulating pump and the second circulating pump.The benzene hydrogenation desulfurization device simple structure, with low cost that the present invention provides, the benzene hydrogenation tail gas desulfurization technique that the present invention provides can make full use of the sulfur-containing waste water that hydrogenation system produces, using desulfurizing tower is that hydrogen sulfide creates suitable reaction condition with sulfur hydrogen radical, by the intervention of sulfur dioxide, reaching the purpose of hydrogen sulfide stripping, hydrogen sulfide stripping rate can reach more than 60%, thus reduces the operating load of coking system desulfurizing tower, extension device service life, more can obtain purity higher sulfur simple substance；The original sulfur-containing waste water of employing system, solves sulfur-containing waste water pollution problem；Also solve sulfur-containing tail gas difficult simultaneously, and sulfur-containing tail gas burns the secondary pollution and waste problem brought.
Description
Technical field
The invention belongs to benzene hydrogenation process technical field, relate to a kind of benzene hydrogenation tail gas desulfurization device and sulfur removal technology thereof.
Background technology
Benzene hydrogenation tail gas is mainly a kind of complicated gas containing high-concentration hydrogen sulfide that benzol hydro refining unit run duration produces
Body, producing cause is that the sulfurous organic compound (such as thiophene, mercaptan etc.) in crude benzol reacts generation hydrogen sulfide at hydrogenation process and hydrogen,
For reaching final products index request, this partial vulcanization hydrogen need to be dehydration processes form row with tail gas together with other components
Put.The component of tail gas is more, mainly includes methane, butane, pentane, hydrogen sulfide, ammonia and a small amount of hydrogen, benzene etc..
Hydrogen sulfide chemical formula is H2S, is a kind of colourless, inflammable sour gas under normal circumstances, band stench when concentration is low,
Abnormal smells from the patient such as addled egg；Abnormal smells from the patient (because the hydrogen sulfide of high concentration can benumb olfactory nerves) is not had on the contrary during concentration height.Hydrogen sulfide is
A kind of acute severe toxicity, sucking a small amount of high-concentration hydrogen sulfide can be fatal within the short time.The hydrogen sulfide of low concentration is to eye, respiratory system
And nervus centralis all has an impact.
Producing substantial amounts of hydrogen sulfide in benzol hydro refining unit hydrogenation process production process, this partial vulcanization hydrogen must be at de-light industry
Sequence is discharged with the form of sulfur-containing tail gas, with the purpose of satisfied production qualified products.The tail gas of discharge is high because of concentration of hydrogen sulfide
Reach 30% (wt) and containing part fuel gas, not directly enter air.
This portion gas feeding coking plant desulfurizing tower is carried out desulfurization process by current many counting apparatus.Coking plant desulfurizing tower
Use HPF doctor treatment, HPF method desulfurization belongs to liquid phase catalytic oxidation desulfurization, HPF catalyst desulfurization and regeneration overall process in by
Catalytic action, is to utilize the ammonia in coke-stove gas to do absorbent, the Wet-type oxidation sweetening with HPF as catalyst, the H in coal gas2S
Entered liquid phase by gas phase react with ammonia Deng acidic components, be converted into the acid ammonium salts such as hydrogen sulfide ammonium, then the oxidation of oxygen in atmosphere
Under be converted into elementary sulfur.HPF method desulfurization selects to use HPF (quinone ferro-cobalt class) composite catalyst, can make the desulfurization of coke-stove gas
Efficiency reaches about 99%.
Coking plant desulfurizing tower is coke oven Aided design, and concentration of hydrogen sulfide in sulfur-containing tail gas produced by benzol hydro refining unit
Too high, tail gas enters desulfurizing tower increases plant running load more than 20%, has a strong impact on desulfuration efficiency.HPF doctor treatment runs effect
Fruit is restricted by many-sides such as ammonia still ruuning situation, ammonia concn, doctor solution surpluses, have impact on desulfuration efficiency, causes environmental protection difficult
Topic.
Separately having NaHS absorption process to produce NaHS device, use sodium hydroxide absorption process, sour gas is through water
Washing tower, wash away in sour gas contained Ammonia, the solution containing ammonium hydro sulfide after washing delivers to acid water air stripping workshop section gas
Propose process.After deamination, gas produces under the effect of catalyst through two-stage alkali liquor absorption reactor (R101A/B) from bottom to top
NaHS, the production process of NaHS is with 30%-45% sodium hydroxide solution as absorbent, reacts generation with hydrogen sulfide
Sodium sulfide, along with absorbing being continuously increased of hydrogen sulfide, gradually produces NaHS.
But this technical operation process relates to multiple processes such as washing, stripping, alkali liquor absorption, and flow process is relative complex, produce
Disposal process is restricted by many-side.The water yield in washing, alkali cleaning increase system, breaks systematic water balance.NaHS device relates to
And equipment is more, investment is big, and produced NaHS can not form scale, and benefit is low, and equally exists product in storing process
The situation of raw environmental issue.
Therefore invent a kind of new tail gas treatment process and improve current vent gas treatment predicament, it has also become urgently to be resolved hurrily asks
Topic.
Summary of the invention
Based on above-mentioned technical problem, it is an object of the invention to provide a kind of benzene hydrogenation tail gas desulfurization device and desulfurization work thereof
Skill, makes full use of the sulfur-containing waste water produced in hydrogenation system, and using desulfurizing tower is that hydrogen sulfide suitably reacts bar with the creation of sulfur hydrogen radical
Part, by the intervention of sulfur dioxide, reaches the purpose of hydrogen sulfide stripping, thus reduces the operating load of coking system desulfurizing tower,
Extension device service life, more can obtain purity higher sulfur simple substance.
The purpose of the present invention is achieved by the following technical programs:
The present invention provides a kind of benzene hydrogenation tail gas desulfurization device, and this benzene hydrogenation tail gas desulfurization device includes desulfurizing tower, dioxy
Change sulfur hold-up tank, waste water storage tank, waste water pump, the first circulating pump and the second circulating pump；
The top of described desulfurizing tower is provided with gaseous phase outlet, and the bottom of described desulfurizing tower is provided with liquid-phase outlet, described de-
Being provided with liquid phase entrance, the first gas phase entrance and the second gas phase entrance on the outer wall of sulfur tower, described gaseous phase outlet, described liquid phase go out
Mouth, described liquid phase entrance, described first gas phase entrance are connected with the inside of described desulfurizing tower with described second gas phase entrance；Institute
State the first gas phase entrance and described second gas phase entrance is positioned at the lower section of described liquid phase entrance；
Described waste water storage tank is connected with described waste water pump, and described waste water pump is connected with described liquid phase entrance；
Described liquid-phase outlet, described first circulating pump circulate mutually with described liquid phase entrance and connect；
Described liquid-phase outlet, described second circulating pump circulate mutually with described liquid phase entrance and connect；Described second circulation
Being provided with branch pipeline on the pipeline that pump is connected with described liquid phase entrance, described branch pipeline is connected with the external world；
Described gaseous phase outlet is connected with the external world；
Described first gas phase entrance is connected with the offgas outlet of benzol hydro refining unit；
Described second gas phase entrance is connected with described sulfur dioxide hold-up tank.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that described branch pipeline is connected with coking plant；Described gas phase goes out
Mouth is connected with changing product workshop.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that described benzene hydrogenation tail gas desulfurization device also includes water sealed tank, institute
State and on the outer wall of desulfurizing tower, be additionally provided with overfall；
Described overfall is positioned at the lower section of described liquid phase entrance and is positioned at described first gas phase entrance and described second gas phase
The top of entrance, and be connected with the inside of described desulfurizing tower；
The entrance of described water sealed tank is connected with described overfall；The outlet of described water sealed tank is connected with described waste water storage tank
Logical.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that arrange on the pipeline that described gaseous phase outlet is connected with the external world
There is the first Pressure gauge.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that described first Pressure gauge is connected with described gaseous phase outlet
Control valve it is provided with on pipeline.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that described first gas phase entrance goes out with the tail gas of benzol hydro refining unit
It is provided with the second Pressure gauge on the pipeline that mouth is connected.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that described second Pressure gauge is connected with described first gas phase entrance
It is provided with control valve on logical pipeline.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that described first circulating pump and the two ends of described second circulating pump
It is each provided with control valve.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that
It is provided with control valve on the pipeline that described first circulating pump is connected with described liquid phase entrance；Described liquid-phase outlet with
It is provided with control valve on the pipeline that described first circulating pump is connected；
It is provided with control valve on the pipeline that described second circulating pump is connected with described liquid phase entrance；Described liquid-phase outlet with
It is provided with control valve on the pipeline that described second circulating pump is connected；It is provided with on the pipeline that described branch pipeline is connected with the external world
Control valve.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that the pipeline that described waste water pump is connected with described liquid phase entrance
On be provided with control valve.
In above-mentioned benzene hydrogenation tail gas desulfurization device, it is preferable that be contained with hydrogen sulfide ammonium inside described desulfurizing tower, but be not limited to
This.
The present invention also provides for a kind of benzene hydrogenation tail gas desulfurization technique, and it uses above-mentioned benzene hydrogenation tail gas desulfurization device to enter
OK, comprise the following steps:
Step one, opens the valve that described first gas phase entrance is connected on pipeline with the offgas outlet of benzol hydro refining unit,
The tail gas that benzol hydro refining unit produces is passed through the inside of described desulfurizing tower, opens described waste water pump and be connected with described liquid phase entrance
Valve on pipeline, starts described waste water pump, and the sulfur-containing waste water in described waste water storage tank is passed into the inside of described desulfurizing tower；
Step 2, opens the valve of described gaseous phase outlet, treats that the pressure of described first gas phase porch is to 40-
When 100kPa and 30-60kPa bigger than the pressure at described gaseous phase outlet, close described waste water pump, and close described waste water pump with
The valve that described liquid phase entrance is connected on pipeline, starts described first circulating pump simultaneously and opens described first circulating pump turnover
Mouthful valve, open valve that described liquid-phase outlet is connected on pipeline with described first circulating pump and open described first circulating pump
The valve being connected on pipeline with described liquid phase entrance；
Step 3, to be recycled stable after, open described sulfur dioxide hold-up tank and be connected with described second gas phase entrance siphunculus
Valve on road, is filled with SO inside described desulfurizing tower2, control SO2Entrance pressure is 40-100kPa, makes SO2With described desulfurization
The tail gas that hydrogen sulfide ammonium, sulfur-containing waste water and the benzol hydro refining unit held inside tower produces reacts, and checks desulfuration pipeline at any time
Middle H2The content of S, and adjust SO2Addition, it is ensured that SO at described gaseous phase outlet2Detection limit is 0；Reacted desulfidation tail gas
Is produced from workshop via described gaseous phase outlet delivering to of pipeline；Reacted doctor solution is followed again by described first circulating pump
Ring；
Step 4, after benzol hydro refining unit stops, closes described sulfur dioxide hold-up tank and described second gas phase entrance phase
Valve on connecting pipeline, stops being filled with SO inside described desulfurizing tower2；Open described waste water pump to be connected with described liquid phase entrance
Valve on siphunculus road, flows into the reacted doctor solution in described desulfurizing tower in described waste water storage tank, to described desulfurization
Time in tower without doctor solution, close the valve of described first circulating pump import and export and stop described first circulating pump；Close described gas
The valve that exports mutually, close valve that described liquid-phase outlet is connected on pipeline with described first circulating pump and close described first
The valve that circulating pump is connected on pipeline with described liquid phase entrance.
In above-mentioned benzene hydrogenation tail gas desulfurization technique, in order to avoid the elemental sulfur produced in course of reaction builds up blocking
Pipeline, it is preferable that during this benzene hydrogenation tail gas desulfurization technique is additionally included in the circular flow in above-mentioned steps three, every 8-10 hour
The step that reacted doctor solution is once replaced, this step includes:
Opening the valve of described branch pipeline, described branch pipeline is connected with coking plant, starts described second circulating pump, beats
Open the valve of described second circulating pump import and export, open the valve that described second circulating pump is connected on pipeline with described liquid phase entrance
Door with open the valve that described second circulating pump is connected on pipeline with described liquid-phase outlet, treat described first gas phase porch
When reducing 10-15kPa before pressure relatively replacement operator, close valve that described second circulating pump imports and exports, close described second and follow
Valve and described second circulating pump of closedown that ring pump is connected on pipeline with described liquid phase entrance are connected with described liquid-phase outlet
Valve on pipeline, stops described second circulating pump；Close the valve of described branch pipeline；
Open the valve that described waste water pump is connected on pipeline with described liquid phase entrance, start described waste water pump, by described
Sulfur-containing waste water in waste water storage tank is passed into the inside of described desulfurizing tower；Treat that the pressure of described first gas phase porch recovers to putting
When changing the pressure before operation, close the valve that described waste water pump is connected on pipeline with described liquid phase entrance, stop described useless
Water pump.
The water sealed tank purpose that the benzene hydrogenation device for recovering tail gas that the present invention provides is arranged is to prevent the internal liquid of desulfurizing tower
When position is too high, liquid, is prevented from entering gaseous phase outlet pipeline to waste water storage tank by water seal overflow.
The benzene hydrogenation solvent recovery technology from vent gas that the present invention provides is by from the sulfur-containing tail gas warp in benzene hydrogenation device for recovering tail gas
Within control valve is decompressed to 100kPa, enter desulfurizing tower, through with sulfur-containing waste water in tower, hydrogen sulfide ammonium and from SO out-of-bounds2Instead
Should, entered exhaust pipe by desulfurizing tower top after removing partial vulcanization hydrogen, and delivering to is produced workshop gas piping and carried out further
Desulfurization.The chemical equation of reaction principle is as follows:
2NH4HS+SO2→2NH3+3S+2H2O (ammonia reacts)；
NH3+H2S=NH4HS (desulphurization reaction)；
Overall reaction equation: 2H2S+SO2=3S+2H2O。
In above-mentioned course of reaction, reaction condition requires wide in range, it is not necessary to the intervention of catalyst, course of reaction heat release, it is possible to
Meet and react temperature required requirement.
The benzene hydrogenation desulfurization device simple structure, with low cost that the present invention provides, the benzene hydrogenation tail gas that the present invention provides takes off
Sulfur technique can make full use of the sulfur-containing waste water that hydrogenation system produces, and using desulfurizing tower is that hydrogen sulfide is created suitable anti-with sulfur hydrogen radical
Answering condition, by the intervention of sulfur dioxide, reach the purpose of hydrogen sulfide stripping, hydrogen sulfide stripping rate can reach more than 60%, from
And reduce the operating load of coking system desulfurizing tower, extension device service life, more can obtain purity higher sulfur simple substance；Adopt
With the original sulfur-containing waste water of system, solve sulfur-containing waste water pollution problem；Also solve sulfur-containing tail gas difficult simultaneously, and sulfur-bearing
Tail gas burns the secondary pollution and waste problem brought.
Accompanying drawing explanation
Fig. 1 is benzene hydrogenation tail gas desulfurization device schematic diagram in the embodiment of the present invention；
Reference numeral illustrates:
1 desulfurizing tower, 2 sulfur dioxide hold-up tanks, 3 waste water storage tanks, 4 first circulating pumps, 5 second circulating pumps, 6 water sealed tanks, 7 give up
Water pump, 8 second Pressure gauges, 9 first Pressure gauges, 10-21 control valve.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and beneficial effect are more clearly understood from, the existing skill to the present invention
Art scheme carries out described further below, but it is not intended that to the present invention can the restriction of practical range.
Embodiment
The present embodiment provides a kind of benzene hydrogenation tail gas desulfurization device, as it is shown in figure 1, this benzene hydrogenation tail gas desulfurization device includes
Desulfurizing tower 1, sulfur dioxide hold-up tank 2, waste water storage tank 3, waste water pump the 7, first circulating pump the 4, second circulating pump 5, water sealed tank 6；De-
The top of sulfur tower 1 is provided with gaseous phase outlet, and the bottom of desulfurizing tower 1 is provided with liquid-phase outlet, and the outer wall of desulfurizing tower 1 is provided with liquid
Phase entrance, the first gas phase entrance, the second gas phase entrance and overfall, described gaseous phase outlet, described liquid-phase outlet, described liquid phase enter
Mouth, described first gas phase entrance, described second gas phase entrance, described overfall are connected with the inside of desulfurizing tower 1；Described first
Gas phase entrance and described second gas phase entrance are positioned at the lower section of described liquid phase entrance, and described overfall is positioned at described liquid phase entrance
Lower section and be positioned at described first gas phase entrance and the top of described second gas phase entrance.
Waste water storage tank 3 is connected with waste water pump 7, and waste water pump 7 is connected with described liquid phase entrance；Described liquid-phase outlet,
One circulating pump 4 and described liquid phase entrance are sequentially connected logical；Described liquid-phase outlet, the second circulating pump 5 and described liquid phase entrance are successively
It is connected；Being provided with branch pipeline on the pipeline that second circulating pump 5 is connected with described liquid phase entrance, described branch pipeline is communicated to Jiao
Gasifying device；Described being communicated to of gaseous phase outlet produces workshop；Described first gas phase entrance is connected with the offgas outlet of benzol hydro refining unit
Logical；Described second gas phase entrance is connected with described sulfur dioxide hold-up tank 2.The entrance of water sealed tank 6 is connected with described overfall
Logical；The outlet of water sealed tank 6 is connected with waste water storage tank 3.
Described gaseous phase outlet is provided with the first Pressure gauge 9 with changing to produce on the pipeline that workshop is connected；First Pressure gauge 9 and institute
State and on the pipeline that gaseous phase outlet is connected, be provided with control valve 13.Described first gas phase entrance and the offgas outlet of benzol hydro refining unit
The second Pressure gauge 8 it is provided with on the pipeline being connected；Set on the pipeline that second Pressure gauge 8 is connected with described first gas phase entrance
It is equipped with control valve 10.The two ends of the first circulating pump 4 and the second circulating pump 5 are each provided with control valve 14,15 and control valve 16,17.
It is provided with control valve 20 on the pipeline that first circulating pump 4 is connected with described liquid phase entrance；Described liquid-phase outlet and the first circulation
Control valve 12 it is provided with on the pipeline that pump 4 is connected；Control is shared with described liquid phase entrance on the pipeline that second circulating pump 5 is connected
Valve 20 processed；Control valve 12 is shared on the pipeline that described liquid-phase outlet and the second circulating pump 5 are connected；Described branch pipeline fills with coking
Put and on the pipeline being connected, be provided with control valve 18.First circulating pump 4 connects with the second circulating pump 5 phase circulation, and shares control
Valve 20 is provided with control valve 19 with control valve 12 and on the pipeline that the circulation of its phase connects.Waste water pump 7 and described liquid phase entrance phase
It is provided with control valve 21 on the pipeline of connection.
Desulfurizing tower 1 is internal is contained with hydrogen sulfide ammonium.
The present embodiment also provides for a kind of benzene hydrogenation tail gas desulfurization technique, and it uses above-mentioned benzene hydrogenation tail gas desulfurization device to enter
OK, comprise the following steps:
Step one, opening controlling valve 10, the tail gas that benzol hydro refining unit produces is passed through desulfurizing tower 1 internal, opens control valve
21, start waste water pump 7, the sulfur-containing waste water in waste water storage tank 3 is passed into desulfurizing tower 1 internal；
Step 2, opening controlling valve 9, control the first Pressure gauge 9 and the second Pressure gauge 10, treat described first gas phase porch
Pressure to 100kPa and 60kPa bigger than the pressure at described gaseous phase outlet time, close waste water pump 7, and closing control valve
21, start the first circulating pump 4 opening controlling valve 14 and 15, opening controlling valve 20 and 12 simultaneously；
Step 3, to be recycled stable after, opening controlling valve 14, inside described desulfurizing tower, be filled with SO2, control SO2Enter pressure
Power is 100kPa, makes SO2The tail gas that the hydrogen sulfide ammonium, sulfur-containing waste water and the benzol hydro refining unit that hold internal with desulfurizing tower 1 produces enters
Row reaction, checks H in desulfuration pipeline at any time2The content of S, and adjust SO2Addition, it is ensured that SO at described gaseous phase outlet2Detection
Amount is 0；Reacted desulfidation tail gas produces workshop via described gaseous phase outlet delivering to of pipeline；Reacted doctor solution passes through first
Circulating pump 4 is circulated again；
Step 4, after benzol hydro refining unit stops, closing control valve 10, stop being filled with SO to desulfurizing tower 1 inside2；Open
Control valve 21, flows in waste water storage tank 3 by the reacted doctor solution in desulfurizing tower 1, time to desulfurizing tower 1 without doctor solution,
Closing control valve 14 and 15 and stop the first circulating pump 4；Closing control valve 13, closing control valve 20 and 12.
During circular flow in above-mentioned steps three, in order to avoid the elemental sulfur generated builds up blocking pipeline, often
The step that reacted doctor solution is once replaced by 8h, this step includes:
Open control valve 18, start the second circulating pump 5, open control valve 16,17 and 19, treat described first gas phase porch
Pressure relatively replacement operator before reduce 15kPa time, closing control valve 16,17,18 and 19, stop the second circulating pump 5；
Open control valve 21, start waste water pump 7, the sulfur-containing waste water in waste water storage tank 3 is passed into the inside of desulfurizing tower 1；
When the pressure that the pressure of described first gas phase porch recovered before replacement operator, closing control valve 21, stop waste water pump
7。
Table 1 below is the cost budgeting table of above-mentioned benzene hydrogenation tail gas desulfurization technique:
Table 1
Using above-mentioned technique, initial investment is low, and supporting 100,000 tons of benzol hydro refining unit only need 1 desulfurizing tower and 2 circulating pumps,
Equipment investment low cost, technological process is simple.Reaction uses sulfur-containing waste water as systematic water balance medium, it is not necessary to additionally increase
Water consumption, course of reaction need not the intervention of catalyst, by the heat of release in course of reaction, meets the temperature needed for reaction
Degree.Use above-mentioned benzene hydrogenation tail gas desulfurization technique, through long-play detection display, use this benzene hydrogenation tail gas desulfurization device
After carrying out desulfurization, the tail gas desulfurization efficiency that benzene hydrogenation process produces reaches more than 60%.
In sum, the benzene hydrogenation desulfurization device simple structure, with low cost that the present invention provides, the benzene that the present invention provides adds
Hydrogen tail gas desulfurization technique can make full use of the sulfur-containing waste water that hydrogenation system produces, and using desulfurizing tower is that hydrogen sulfide is created with sulfur hydrogen radical
Making suitable reaction condition, by the intervention of sulfur dioxide, reach the purpose of hydrogen sulfide stripping, hydrogen sulfide stripping rate can reach 60%
Above, thus reduce the operating load of coking system desulfurizing tower, extension device service life, more can obtain the higher sulfur of purity
Simple substance；The original sulfur-containing waste water of employing system, solves sulfur-containing waste water pollution problem；Also solve sulfur-containing tail gas difficult simultaneously,
And sulfur-containing tail gas burns the secondary pollution and waste problem brought.
Claims (10)
1. a benzene hydrogenation tail gas desulfurization device, it is characterised in that: this benzene hydrogenation tail gas desulfurization device includes desulfurizing tower, titanium dioxide
Sulfur hold-up tank, waste water storage tank, waste water pump, the first circulating pump and the second circulating pump；
The top of described desulfurizing tower is provided with gaseous phase outlet, and the bottom of described desulfurizing tower is provided with liquid-phase outlet, described desulfurizing tower
Outer wall on be provided with liquid phase entrance, the first gas phase entrance and the second gas phase entrance, described gaseous phase outlet, described liquid-phase outlet,
Described liquid phase entrance, described first gas phase entrance are connected with the inside of described desulfurizing tower with described second gas phase entrance；Described
First gas phase entrance and described second gas phase entrance are positioned at the lower section of described liquid phase entrance；
Described waste water storage tank is connected with described waste water pump, and described waste water pump is connected with described liquid phase entrance；
Described liquid-phase outlet, described first circulating pump and described liquid phase entrance are sequentially connected logical；
Described liquid-phase outlet, described second circulating pump and described liquid phase entrance are sequentially connected logical；Described second circulating pump is with described
Being provided with branch pipeline on the pipeline that liquid phase entrance is connected, described branch pipeline is connected with the external world；
Described gaseous phase outlet is connected with the external world；
Described first gas phase entrance is connected with the offgas outlet of benzol hydro refining unit；
Described second gas phase entrance is connected with described sulfur dioxide hold-up tank.
Benzene hydrogenation tail gas desulfurization device the most according to claim 1, it is characterised in that: described branch pipeline and coking plant phase
Connection；Described gaseous phase outlet is connected with changing product workshop.
Benzene hydrogenation tail gas desulfurization device the most according to claim 1, it is characterised in that: this benzene hydrogenation tail gas desulfurization device is also
Including water sealed tank, the outer wall of described desulfurizing tower is additionally provided with overfall；
Described overfall is positioned at the lower section of described liquid phase entrance and is positioned at described first gas phase entrance and described second gas phase entrance
Top, and be connected with the inside of described desulfurizing tower；
The entrance of described water sealed tank is connected with described overfall；The outlet of described water sealed tank is connected with described waste water storage tank.
Benzene hydrogenation tail gas desulfurization device the most according to claim 1, it is characterised in that: described gaseous phase outlet is connected with the external world
It is provided with the first Pressure gauge on logical pipeline；The pipeline that described first gas phase entrance is connected with the offgas outlet of benzol hydro refining unit
On be provided with the second Pressure gauge；
Preferably, the pipeline that described first Pressure gauge is connected with described gaseous phase outlet is provided with control valve；
Preferably, the pipeline that described second Pressure gauge is connected with described first gas phase entrance is provided with control valve.
Benzene hydrogenation tail gas desulfurization device the most according to claim 1, it is characterised in that: described first circulating pump and described
The two ends of two circulating pumps are each provided with control valve.
Benzene hydrogenation tail gas desulfurization device the most according to claim 1, it is characterised in that:
It is provided with control valve on the pipeline that described first circulating pump is connected with described liquid phase entrance；Described liquid-phase outlet is with described
It is provided with control valve on the pipeline that first circulating pump is connected；
It is provided with control valve on the pipeline that described second circulating pump is connected with described liquid phase entrance；Described liquid-phase outlet is with described
It is provided with control valve on the pipeline that second circulating pump is connected；It is provided with control on the pipeline that described branch pipeline is connected with the external world
Valve.
Benzene hydrogenation tail gas desulfurization device the most according to claim 1, it is characterised in that: described waste water pump enters with described liquid phase
It is provided with control valve on the pipeline that mouth is connected.
Benzene hydrogenation tail gas desulfurization device the most according to claim 1, it is characterised in that: it is contained with sulfur inside described desulfurizing tower
Change hydrogen ammonium.
9. a benzene hydrogenation tail gas desulfurization technique, it uses the benzene hydrogenation tail gas desulfurization device described in any one of claim 1-8
Carry out, comprise the following steps:
Step one, opens the valve that described first gas phase entrance is connected on pipeline with the offgas outlet from benzol hydro refining unit,
The tail gas that benzol hydro refining unit produces is passed through the inside of described desulfurizing tower, opens described waste water pump and be connected with described liquid phase entrance
Valve on pipeline, starts described waste water pump, and the sulfur-containing waste water in described waste water storage tank is passed into the inside of described desulfurizing tower；
Step 2, opens the valve of described gaseous phase outlet, treat the pressure of described first gas phase porch to 40-100kPa and
During 30-60kPa bigger than the pressure at described gaseous phase outlet, close described waste water pump, and close described waste water pump and described liquid phase
Entrance is connected the valve on pipeline, start simultaneously described first circulating pump and open described first circulating pump terminal valve,
Open valve that described liquid-phase outlet is connected on pipeline with described first circulating pump and open described first circulating pump with described
Liquid phase entrance is connected the valve on pipeline；
Step 3, to be recycled stable after, open described sulfur dioxide hold-up tank and be connected on pipeline with described second gas phase entrance
Valve, inside described desulfurizing tower, be filled with SO2, control SO2Entrance pressure is 40-100kPa, makes SO2With in described desulfurizing tower
The tail gas that hydrogen sulfide ammonium, sulfur-containing waste water and the benzol hydro refining unit that portion holds produces reacts, and checks H in desulfuration pipeline at any time2S
Content, and adjust SO2Addition, it is ensured that SO at described gaseous phase outlet2Detection limit is 0；Reacted desulfidation tail gas is via institute
State gaseous phase outlet delivering to of pipeline and produce workshop；Reacted doctor solution is circulated again by described first circulating pump；
Step 4, after benzol hydro refining unit stops, closes described sulfur dioxide hold-up tank and is connected with described second gas phase entrance
Valve on pipeline, stops being filled with SO inside described desulfurizing tower2；Open described waste water pump to be connected with described liquid phase entrance siphunculus
Valve on road, flows into the reacted doctor solution in described desulfurizing tower in described waste water storage tank, to described desulfurizing tower
In time without doctor solution, close the valve of described first circulating pump import and export and stop described first circulating pump；Close described gas phase to go out
Mouthful valve, close valve that described liquid-phase outlet is connected on pipeline with described first circulating pump and close described first and circulate
The valve that pump is connected on pipeline with described liquid phase entrance.
Benzene hydrogenation tail gas desulfurization technique the most according to claim 9, it is characterised in that this benzene hydrogenation tail gas desulfurization technique
During being additionally included in the circular flow in above-mentioned steps three, the step reacted doctor solution once replaced in every 8-10 hour
Suddenly, this step includes:
Opening the valve of described branch pipeline, described branch pipeline is connected with coking plant, starts described second circulating pump, opens institute
State valve that the second circulating pump imports and exports, open valve that described second circulating pump is connected on pipeline with described liquid phase entrance and
Open the valve that described second circulating pump is connected on pipeline with described liquid-phase outlet, treat the pressure of described first gas phase porch
When reducing 10-15kPa before relatively replacement operator, close the valve of described second circulating pump import and export, close described second circulating pump
The valve that is connected on pipeline with described liquid phase entrance and close described second circulating pump and be connected with described liquid-phase outlet pipeline
On valve, stop described second circulating pump；Close the valve of described branch pipeline；
Open the valve that described waste water pump is connected on pipeline with described liquid phase entrance, start described waste water pump, by described waste water
Sulfur-containing waste water in storage tank is passed into the inside of described desulfurizing tower；Treat that the pressure of described first gas phase porch recovers to replacing behaviour
During pressure before work, close the valve that described waste water pump is connected on pipeline with described liquid phase entrance, stop described waste water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610779359.2A CN106268220B (en) | 2016-08-30 | 2016-08-30 | A kind of benzene hydrogenation tail gas desulfurization device and its sulfur removal technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610779359.2A CN106268220B (en) | 2016-08-30 | 2016-08-30 | A kind of benzene hydrogenation tail gas desulfurization device and its sulfur removal technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106268220A true CN106268220A (en) | 2017-01-04 |
| CN106268220B CN106268220B (en) | 2019-01-04 |
Family
ID=57672861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610779359.2A Active CN106268220B (en) | 2016-08-30 | 2016-08-30 | A kind of benzene hydrogenation tail gas desulfurization device and its sulfur removal technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106268220B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227372A (en) * | 2008-11-28 | 2011-10-26 | 国际壳牌研究有限公司 | Process for selective oxidation of hydrogen sulphide |
| CN204469528U (en) * | 2015-03-04 | 2015-07-15 | 河北新启元能源技术开发股份有限公司 | Device for recovering tail gas |
| CN104910970A (en) * | 2015-05-22 | 2015-09-16 | 张玲 | Series-process coal gas desulfurization process method and desulfurization device therefor |
-
2016
- 2016-08-30 CN CN201610779359.2A patent/CN106268220B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227372A (en) * | 2008-11-28 | 2011-10-26 | 国际壳牌研究有限公司 | Process for selective oxidation of hydrogen sulphide |
| CN204469528U (en) * | 2015-03-04 | 2015-07-15 | 河北新启元能源技术开发股份有限公司 | Device for recovering tail gas |
| CN104910970A (en) * | 2015-05-22 | 2015-09-16 | 张玲 | Series-process coal gas desulfurization process method and desulfurization device therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106268220B (en) | 2019-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| BR112013003959B1 (en) | high pressure reduction-oxidation desulfurization process | |
| CN103771353A (en) | Regeneration method for alkylated waste sulfuric acid | |
| CN105858604B (en) | A kind of full temperature journey pressure swing adsorption method of enriched gas source removing hydrogen sulfide | |
| CN102557300B (en) | Device and treatment method for desulfurizing and neutralizing liquefied gas alkaline mud | |
| CN206940821U (en) | Complexing Iron desulfurizer | |
| CN108686489A (en) | A kind of suspension bed wet desulfurizing process | |
| CN107381768A (en) | A kind of continuous processing technique of spent lye | |
| CN106512650A (en) | Method and system for treating Claus process tail gas | |
| CN108059975A (en) | Desulfuration of liquefied gas device and its technique | |
| CN104119947B (en) | A kind of catalytic cracking flue gas desulfurization and aftertreatment technology | |
| CN112410082A (en) | Single-tower desulfurization device and process for low-sulfur-content coal gas based on complex iron catalyst | |
| CN204911189U (en) | Device of hydrogen phosphate in desorption yellow phosphoric tail gas | |
| CN110155957B (en) | Method for preparing sulfuric acid by using zinc-containing wastewater and NaHS waste liquid in viscose fiber factory | |
| CN104624019A (en) | Treatment method for alkali liquor oxidation regeneration tail gas containing mercaptide | |
| CN204237560U (en) | A kind of device preparing Sodium sulfhydrate | |
| CN106268220A (en) | A kind of benzene hydrogenation tail gas desulfurization device and sulfur removal technology thereof | |
| CN105542873A (en) | A purification process system for coke oven gas | |
| CN105441140A (en) | Coke oven gas purifying system | |
| CN214528874U (en) | Coke oven gas wet desulphurization high tower regeneration system | |
| CN210711415U (en) | Coal-to-liquid desulfurization and deodorization system | |
| CN207845583U (en) | Desulfuration of liquefied gas device | |
| CN208599454U (en) | The system of hydrogen sulfide tail gas processing in a kind of tungsten smelting process | |
| CN206215046U (en) | Chemical industry Acidic Gas Treating system | |
| CN205700144U (en) | A kind of low concentration hydrogen sulphide acid tail gas processing means | |
| CN111167286A (en) | Pressure swing adsorption decarbonization and vent gas desulfurization device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |