CN106076074B - Two sections of exhaust gas processing devices in a kind of benzene chloride production - Google Patents
Two sections of exhaust gas processing devices in a kind of benzene chloride production Download PDFInfo
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- CN106076074B CN106076074B CN201610628903.3A CN201610628903A CN106076074B CN 106076074 B CN106076074 B CN 106076074B CN 201610628903 A CN201610628903 A CN 201610628903A CN 106076074 B CN106076074 B CN 106076074B
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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
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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
- B01D53/1406—Multiple stage absorption
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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
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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
- B01D53/1487—Removing organic compounds
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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
- B01D53/68—Halogens or halogen compounds
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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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
Abstract
The present invention proposes two sections of exhaust gas processing devices in a kind of benzene chloride production, including benzene absorptive unit, hydrogen chloride absorption unit, benzene absorbing unit, spray absorption unit.Two sections of tail gas of benzene Benzene Chloride will be contained and pass sequentially through benzene absorptive unit, hydrogen chloride absorption unit, benzene absorbing unit, spray absorption unit, benzene and Benzene Chloride organic gas are absorbed in benzene absorptive unit and benzene absorbing unit, hydrogen chloride gas is absorbed in hydrogen chloride absorption unit and spray absorption unit, remaining inert gas high position emptying.The present invention makes full use of the characteristics of two unit operations of absorption and absorption, and absorption operation is operated suitable for big concentration of component, and treating capacity is big, and low energy consumption, and adsorption operations can further decrease the content of organics in tail gas, and tail gas is made to reach discharge standard.Apparatus of the present invention overall efficiency is high and low energy consumption, and operating cost is low, can accomplish to greatest extent safe and environment-friendly, nuisanceless.
Description
Technical field
The present invention relates to two sections of vent gas treatments in Benzene Chloride exhaust system technical field more particularly to a kind of benzene chloride production
Device.
Background technology
Benzene Chloride is a kind of basic organic chemical industry raw material, and primary raw material is benzene and chlorine, and purified petroleum benzin passes through catalyst after drying
Effect, chlorination reaction occurs with chlorine in chlorinator, the acid chlorization liquid obtained after reaction goes water, alkali cleaning processing, dry
Enter thick, rectifying column distillation afterwards and obtains finished product Benzene Chloride.Benzene chloride production is benzene chlorination under fluidized state, has chlorine in product
Change benzene and hydrogen chloride gas.Due to high temperature continuous chlorination process, the removal of reaction heat is gasified by the evaporation of benzene to realize, therefore raw
At tail gas in mainly there is hydrogen chloride gas, benzene vapor, a small amount of chlorination benzene vapor and inert gas, direct emission not only to cause
The wasting of resources, and serious pollution can be generated to environment.Prior art falling liquid film circulating slot interval renews fresh absorbing liquid one in eight hours
Secondary, benzene content is unstable in tail gas during reloading, and highest can rise to hundreds of ppm, to follow-up system in safety and energy consumption
It is affected.Falling liquid film tail gas is entered absorption by Hydrochloric Acid system and is absorbed using washing waste water doping tap water, difficult containing sour and water in water
With control, 3 absorption towers are sequentially distributed from high to low, enter next stage by flow by gravity, and assimilation effect is poor, when acid concentration
It is dilute unstable when dense；Tail gas is directly vented after afterbody packed tower, often contains a large amount of HCl gases in tail gas and benzene steams
Vapour, by analysis, 2000~6000ppm containing benzene in two sections of tail gas of benzene chloride production is not only polluted the environment, to employee
Body also results in very major injury, is all difficult to effectively be solved always.
Invention content
Based on technical problem present in background technology, the present invention proposes two sections of vent gas treatments in a kind of benzene chloride production
Device.
Two sections of exhaust gas processing devices in a kind of benzene chloride production proposed by the present invention, including benzene absorptive unit, hydrogen chloride are inhaled
Unit, benzene absorbing unit, spray absorption unit are received, wherein：
Benzene absorptive unit include level-one benzene absorption plant, two level benzene absorption plant ..., n grades of benzene absorption plants, m grades of benzene inhale
Receiving apparatus is equipped with m grades of benzene absorption towers, m grades of benzene circulating slots, m grades of benzene circulating pumps, and m grades of benzene absorption towers are equipped with m towers air inlet, the
M towers gas outlet, m towers inlet and m tower liquid outlets, m grades of benzene circulating slots are interior to be equipped with benzene absorbing liquid, and m grades of benzene circulating slots are equipped with
The m towers inlet of m slots inlet, m slot liquid outlets, m grades of benzene absorption plants goes out liquid by m grades of benzene circulating pumps and m slots
Mouth connection, the m towers liquid outlet of m grades of benzene absorption plants are connect with m slot inlets, the m towers gas outlet of m grades of benzene absorption plants
It is connect with the m+1 tower air inlets of m+1 grades of benzene absorption plants；Wherein：N, m is natural number, n>m≥1；
Hydrogen chloride absorption unit include level-one hydrogen chloride absorption device, secondary chlorination hydrogen absorption plant ..., x grades of hydrogen chloride
Absorption plant, y grades of hydrogen chloride absorption devices are equipped with y grades of hydrogen chloride absorption towers, y grades of hydrogen chloride circulating slots, y grades of hydrogen chloride cycles
Pump, y grades of hydrogen chloride absorption towers are equipped with y towers gas access, y towers gas vent, y towers liquid inlet, y tower liquid discharges
Mouthful, hydrogen chloride absorption liquid is equipped in y grades of hydrogen chloride circulating slots, y grades of hydrogen chloride circulating slots are equipped with y tank liquids entrance, y tank liquors
Body exports, and the first tower gas access of level-one hydrogen chloride absorption device is connect with the n-th tower gas outlet of n grades of benzene absorption plants, y grades
The y towers liquid inlet of hydrogen chloride absorption device is connected by y grades of hydrogen chloride circulating pumps and the outlet of y tank liquids, y grades of hydrogen chloride
The y towers liquid outlet of absorption plant is connect with y tank liquid entrances, the y towers gas vent of y grades of hydrogen chloride absorption devices with
The y+1 towers gas access connection of y+1 grades of hydrogen chloride absorption devices；Wherein：X, y is natural number, x>y≥1；
Benzene absorbing unit includes the benzene absorber of multiple parallel connections, and adsorbent, each benzene absorber are equipped in each benzene absorber
It is equipped with absorption air inlet, absorption gas outlet, the xth of the absorption air inlet of each benzene absorber with x grades of hydrogen chloride absorption devices
Tower gas vent connects；
Spray absorption unit include the first spray column, Sprayer Circulation slot, Sprayer Circulation pump, the first spray column be equipped with first into
Gas port, the first gas outlet, the first inlet, the first liquid outlet, are equipped with spray liquid in Sprayer Circulation slot, and Sprayer Circulation slot is equipped with the
Two inlets, the second liquid outlet, the first air inlet are connect with the absorption gas outlet of each benzene absorber respectively, and the first inlet passes through
Sprayer Circulation pump is connect with the second liquid outlet, and the first liquid outlet is connect with the second inlet.
Preferably, m grades of benzene absorption towers are equipped with m grade benzene absorption gas-liquid separation chamber, m towers liquid outlet, m towers gas outlet with
M grades of benzene absorb gas-liquid separation chamber's conducting.
Preferably, y grades of hydrogen chloride absorption towers are equipped with y grades of hydrogen chloride absorption gas-liquid separation chamber, y towers liquid outlet, y towers
Gas vent is connected with y grades of hydrogen chloride absorption gas-liquid separation chamber.
Preferably, Sprayer Circulation slot is equipped with the second gas outlet, and the second gas outlet is connect with the first air inlet.
Preferably, the m grade benzene circulating slots of m grades of benzene absorption plants are equipped with m slots gas outlet, m slots gas outlet and m+1 grades of benzene
The m+1 tower air inlets of absorption plant connect, and the n-th slot gas outlet and the first tower gas access of level-one hydrogen chloride absorption device connect
It connects.
Preferably, m grades of benzene circulating slots are connected to and the benzene absorbing liquid overflow in m+1 grades of benzene circulating slots with m+1 grades of benzene circulating slots
Enter m grades of benzene circulating slots.
Preferably, hydrogen chloride absorption unit further includes the second spray column, and the second spray column goes out equipped with the second air inlet, second
Gas port, third inlet, third liquid outlet, the second air inlet connect with the xth tower gas vent of x grades of hydrogen chloride absorption devices respectively
It connects, the second gas outlet is connect with the absorption air inlet of each benzene absorber respectively, third liquid outlet and x grades of hydrogen chloride absorption devices
X grades of hydrogen chloride circulating slot connections.
Preferably, the second spray column uses metal material packed tower, and its filler uses woven wire corrugated plating.
Preferably, the y grade hydrogen chloride circulating slots of y grades of hydrogen chloride absorption devices are equipped with y slot gas vents, y slot gases
Outlet is connect with the y+1 towers gas access of y+1 grades of hydrogen chloride absorption devices, and the xth slot gas of x grades of hydrogen chloride absorption devices goes out
Mouth is connect with the second air inlet.
Preferably, y grades of hydrogen chloride circulating slots are connected to y+1 grades of hydrogen chloride circulating slots and in y+1 grades of hydrogen chloride circulating slots
Hydrogen chloride absorption hydrorrhea flows into y grades of hydrogen chloride circulating slots.
Preferably, the m grade benzene absorption tower of m grades of benzene absorption plants is equipped with m grades of a cooling medium inlets and m grades of a cooling media go out
Mouthful.
Preferably, the y grade hydrogen chloride absorption towers of y grades of hydrogen chloride absorption devices are equipped with y grades of b cooling medium inlets and y grades of b are cold
But media outlet.
Preferably, benzene absorptive unit includes level-one benzene absorption plant, two level benzene absorption plant and three-level benzene absorption plant.
Preferably, hydrogen chloride absorption unit includes level-one hydrogen chloride absorption device, secondary chlorination hydrogen absorption plant and three-level
Hydrogen chloride absorption device.
Working principle of the present invention is as follows：2000~6000ppm of benzene Benzene Chlorides, two sections of tail gas will be contained and pass sequentially through benzene absorption
Unit, hydrogen chloride absorption unit, benzene absorbing unit, spray absorption unit, benzene and Benzene Chloride organic gas in benzene absorptive unit and
It is absorbed in benzene absorbing unit, hydrogen chloride gas is absorbed in hydrogen chloride absorption unit and spray absorption unit, remaining lazy
Property a gas high position emptying.
The present invention makes full use of the characteristics of two unit operations of absorption and absorption, and absorption operation is grasped suitable for big concentration of component
Make, treating capacity is big, and low energy consumption, and adsorption operations can further decrease the content of organics in tail gas, and tail gas is made to reach discharge
Standard.Apparatus of the present invention overall efficiencies is high and low energy consumption, and operating cost is low, can accomplish to greatest extent it is safe and environment-friendly, without public affairs
Evil.
Description of the drawings
Fig. 1 is two sections of exhaust gas processing device structural schematic diagrams in a kind of benzene chloride production proposed by the present invention.
Specific implementation mode
As shown in FIG. 1, FIG. 1 is two sections of exhaust gas processing devices in a kind of benzene chloride production proposed by the present invention.
Referring to Fig.1, in one embodiment, two sections of exhaust gas processing devices in a kind of benzene chloride production of present invention proposition, packet
Benzene absorptive unit, hydrogen chloride absorption unit, benzene absorbing unit, spray absorption unit are included, wherein：
In the present embodiment, benzene absorptive unit includes level-one benzene absorption plant, two level benzene absorption plant, three-level benzene absorption dress
It sets, wherein：
Level-one benzene absorption plant is equipped with level-one benzene absorption tower 1, level-one benzene circulating slot 2, level-one benzene circulating pump 3, and level-one benzene is inhaled
It receives tower 1 and is equipped with the first tower air inlet, the first tower gas outlet, the first tower inlet, the first tower liquid outlet, level-one a cooling media
Import and level-one a cool down media outlet, and a cools down medium -5~-15 DEG C of chilled brines of use, and level-one benzene absorption tower 1 uses phenolic aldehyde
Impregnated graphite material descending membrane-pipe type absorber, and level-one benzene absorption tower 1 is equipped with level-one benzene and absorbs gas-liquid separation chamber, the first tower goes out liquid
Mouth, the first tower gas outlet absorb gas-liquid separation chamber with level-one benzene and are connected.2 liner phenolic fiberglass reinforced plastics anti-corrosion of level-one benzene circulating slot
Layer, is equipped with benzene absorbing liquid in level-one benzene circulating slot 2, and level-one benzene circulating slot 2 is equipped with the first slot inlet, the first slot liquid outlet, the
First tower inlet of one slot gas outlet, level-one benzene absorption plant is connect by level-one benzene circulating pump 3 with the first slot liquid outlet, and one
First tower liquid outlet of grade benzene absorption plant is connect with the first slot inlet.
Two level benzene absorption plant is equipped with two level benzene absorption tower 4, two level benzene circulating slot 5, two level benzene circulating pump 6, and two level benzene is inhaled
It receives tower 4 and is equipped with the second tower air inlet, the second tower gas outlet, the second tower inlet, the second tower liquid outlet, two level a cooling media
Import and two level a cool down media outlet, and a cools down medium -5~-15 DEG C of chilled brines of use, and two level benzene absorption tower 4 uses phenolic aldehyde
Impregnated graphite material descending membrane-pipe type absorber, and two level benzene absorption tower 4 is equipped with two level benzene and absorbs gas-liquid separation chamber, the second tower goes out liquid
Mouth, the second tower gas outlet absorb gas-liquid separation chamber with two level benzene and are connected.5 liner phenolic fiberglass reinforced plastics anti-corrosion of two level benzene circulating slot
Layer, is equipped with benzene absorbing liquid in two level benzene circulating slot 5, and two level benzene circulating slot 5 is equipped with the second slot inlet, the second slot liquid outlet, the
Two slot gas outlets, the second tower air inlet of two level benzene absorption plant and the first tower gas outlet of level-one benzene absorption plant, the first slot
Gas outlet connects, and the second tower inlet of two level benzene absorption plant is connect by two level benzene circulating pump 6 with the second slot liquid outlet, and two
Second tower liquid outlet of grade benzene absorption plant is connect with the second slot inlet.
Three-level benzene absorption plant is equipped with three-level benzene absorption tower 7, three-level benzene circulating slot 8, three-level benzene circulating pump 9, and three-level benzene is inhaled
It receives tower 7 and is equipped with third tower air inlet, third tower gas outlet, third tower inlet, third tower liquid outlet, three-level a cooling media
Import and three-level a cool down media outlet, and a cools down medium -5~-15 DEG C of chilled brines of use, and three-level benzene absorption tower 7 uses phenolic aldehyde
Impregnated graphite material descending membrane-pipe type absorber, and three-level benzene absorption tower 7 is equipped with three-level benzene and absorbs gas-liquid separation chamber, third tower goes out liquid
Mouth, third tower gas outlet absorb gas-liquid separation chamber with three-level benzene and are connected.8 liner phenolic fiberglass reinforced plastics anti-corrosion of three-level benzene circulating slot
Layer, is equipped with benzene absorbing liquid in three-level benzene circulating slot 8, and three-level benzene circulating slot 8 is equipped with third slot inlet, third slot liquid outlet, the
Three slot gas outlets, the third tower air inlet of three-level benzene absorption plant and the second tower gas outlet of two level benzene absorption plant, the second slot
Gas outlet connects, and the third tower inlet of three-level benzene absorption plant is connect by three-level benzene circulating pump 9 with third slot liquid outlet, and three
The third tower liquid outlet of grade benzene absorption plant is connect with third slot inlet.
In the present embodiment, level-one benzene absorption tower 1, two level benzene absorption tower 4,7 gas-liquid two-phase of three-level benzene absorption tower are using in the same direction
Absorption pattern, level-one benzene absorption tower 1, two level benzene absorption tower 4,7 gaseous phase outlet temperature of three-level benzene absorption tower be respectively 55~65 DEG C,
30~40 DEG C, 20~25 DEG C, and 7 gaseous phase outlet 2~5ppm containing benzene of three-level benzene absorption tower.Level-one benzene circulating slot 2, two level benzene cycle
Slot 5, three-level benzene circulating slot 8 are sequentially communicated, and the absorbing liquid into three-level benzene absorption cycle slot 8 is containing benzene 0.03~0.1% (wt)
Substandard products Benzene Chloride, and in three-level benzene absorption cycle slot 8 absorbing liquid containing benzene≤10% (wt) overflow enter two level benzene absorption cycle slot 5,
Absorbing liquid enters level-one benzene absorption cycle slot 2, level-one benzene absorption cycle containing benzene≤20% (wt) overflow in two level benzene absorption cycle slot 5
Absorbing liquid is produced containing benzene 36~45% (wt) in slot 2.
In the present embodiment, hydrogen chloride absorption unit includes level-one hydrogen chloride absorption device, secondary chlorination hydrogen absorption plant, three
Grade hydrogen chloride absorption device, the second spray column 19, wherein：
Level-one hydrogen chloride absorption device is equipped with level-one hydrogen chloride absorption tower 10, level-one hydrogen chloride circulating slot 11, level-one chlorination
Hydrogen circulating pump 12, level-one hydrogen chloride absorption tower 10 enter equipped with the first tower gas access, the first tower gas vent, the first tower liquid
Mouth, the first tower liquid outlet, level-one b cooling medium inlets and level-one b cool down media outlet, and b cools down medium and uses 20~30 DEG C
Recirculated water, level-one hydrogen chloride absorption tower 10 use phenolic impregnated graphite material descending membrane-pipe type absorber, and level-one hydrogen chloride absorption
Tower 10 be equipped with level-one hydrogen chloride absorption gas-liquid separation chamber, the first tower liquid outlet, the first tower gas outlet with level-one hydrogen chloride absorption
Gas-liquid separation chamber is connected.11 liner phenolic fiberglass reinforced plastics erosion resistant coating of level-one hydrogen chloride circulating slot is set in level-one hydrogen chloride circulating slot 11
There are hydrogen chloride absorption liquid, level-one hydrogen chloride circulating slot 11 to be equipped with the first tank liquid entrance, the outlet of the first tank liquid, the first slot gas
Outlet, the first tower gas access of level-one hydrogen chloride absorption device and the third tower gas outlet of three-level benzene absorption plant, third slot
Gas outlet connects, and the first tower liquid inlet of level-one hydrogen chloride absorption device passes through level-one hydrogen chloride circulating pump 12 and the first tank liquor
Body outlet connection, the first tower liquid outlet of level-one hydrogen chloride absorption device are connect with the first tank liquid entrance.
Secondary chlorination hydrogen absorption plant is equipped with secondary chlorination hydrogen absorption tower 13, secondary chlorination hydrogen circulating slot 14, secondary chlorination
Hydrogen circulating pump 15, secondary chlorination hydrogen absorption tower 13 enter equipped with the second tower gas access, the second tower gas vent, the second tower liquid
Mouth, the second tower liquid outlet, two level b cooling medium inlets and two level b cool down media outlet, and b cools down medium and uses 20~30 DEG C
Recirculated water, the secondary chlorination hydrogen absorption tower 13 of secondary chlorination hydrogen absorption plant is using using phenolic impregnated graphite material descending membrane-pipe type
Absorber, and secondary chlorination hydrogen absorption tower 13 is equipped with secondary chlorination hydrogen and absorbs gas-liquid separation chamber, the second tower liquid outlet, the second tower go out
Gas port absorbs gas-liquid separation chamber with secondary chlorination hydrogen and is connected.14 liner phenolic fiberglass reinforced plastics erosion resistant coating of secondary chlorination hydrogen circulating slot,
It is equipped with hydrogen chloride absorption liquid in secondary chlorination hydrogen circulating slot 14, secondary chlorination hydrogen circulating slot 14 is equipped with the second tank liquid entrance, the
The outlet of two tank liquids, the second slot gas vent, the second tower gas access and the level-one hydrogen chloride of secondary chlorination hydrogen absorption plant are inhaled
First tower gas vent of receiving apparatus, the connection of the first slot gas vent, the second tower liquid inlet of secondary chlorination hydrogen absorption plant
It is connected by secondary chlorination hydrogen circulating pump 15 and the outlet of the second tank liquid, the second tower liquid outlet of secondary chlorination hydrogen absorption plant
It is connect with the second tank liquid entrance.
Three-level hydrogen chloride absorption device is equipped with three-level hydrogen chloride absorption tower 16, three-level hydrogen chloride circulating slot 17, three-level chlorination
Hydrogen circulating pump 18, three-level hydrogen chloride absorption tower 16 enter equipped with third tower gas access, third tower gas vent, third tower liquid
Mouth, third tower liquid outlet, three-level b cooling medium inlets and three-level b cool down media outlet, and b cools down medium and uses 20~30 DEG C
Recirculated water, the secondary chlorination hydrogen absorption tower 13 of secondary chlorination hydrogen absorption plant is using using phenolic impregnated graphite material descending membrane-pipe type
Absorber, and secondary chlorination hydrogen absorption tower 13 is equipped with secondary chlorination hydrogen and absorbs gas-liquid separation chamber, the second tower liquid outlet, the second tower go out
Gas port absorbs gas-liquid separation chamber with secondary chlorination hydrogen and is connected.17 liner phenolic fiberglass reinforced plastics erosion resistant coating of three-level hydrogen chloride circulating slot,
It is equipped with hydrogen chloride absorption liquid in three-level hydrogen chloride circulating slot 17, three-level hydrogen chloride circulating slot 17 is equipped with third tank liquid entrance, the
The outlet of three tank liquids, third slot gas vent, third tower gas access and the secondary chlorination hydrogen of three-level hydrogen chloride absorption device are inhaled
Second tower gas vent of receiving apparatus, the connection of the second slot gas vent, the third tower liquid inlet of three-level hydrogen chloride absorption device
It is connected by three-level hydrogen chloride circulating pump 18 and the outlet of third tank liquid, the third tower liquid outlet of three-level hydrogen chloride absorption device
It is connect with third tank liquid entrance.
Second spray column 19 is equipped with the second air inlet, the second gas outlet, third inlet, third liquid outlet, the second air inlet
Mouth is connect with the third tower gas vent of three-level hydrogen chloride absorption device, third slot gas vent respectively, third liquid outlet and three
The three-level hydrogen chloride circulating slot 17 of grade hydrogen chloride absorption device connects.Second spray column 19 uses common graphite material filler tower,
And its filler uses 250Y type ceramics corrugated plate packings.
In the present embodiment, level-one hydrogen chloride absorption tower 10, secondary chlorination hydrogen absorption tower 13,16 gas of three-level hydrogen chloride absorption tower
Liquid two-phase uses absorption pattern in the same direction, 19 gas-liquid two-phase of the second spray column to use reverse absorption pattern, level-one hydrogen chloride absorption tower
10, secondary chlorination hydrogen absorption tower 13,16 gaseous phase outlet temperature of three-level hydrogen chloride absorption tower be respectively 55~65 DEG C, 30~40 DEG C,
20~25 DEG C, and 19 gaseous phase outlet of the second spray column contains benzene≤10ppm, HCl (g)≤10ppm.Level-one hydrogen chloride circulating slot 11,
Secondary chlorination hydrogen circulating slot 14, three-level hydrogen chloride circulating slot 17 are sequentially communicated, and the absorbing liquid into the second spray column 19 is originally
Water or high purity water enter three-level hydrogen chloride absorption circulating slot 17 after gas absorbs in the second spray column of absorbing liquid pair 19, and
Absorbing liquid enters secondary chlorination hydrogen absorption cycle slot 14, two level containing sour 6~8% (wt) overflows in three-level hydrogen chloride absorption circulating slot 17
Absorbing liquid enters level-one hydrogen chloride absorption circulating slot 11, level-one chlorine containing sour 18~20% (wt) overflows in hydrogen chloride absorption circulating slot 14
Change absorbing liquid 31~33% (wt) containing acid extraction in hydrogen absorption cycle slot 11.
In the present embodiment, benzene absorbing unit includes two benzene absorbers 20 in parallel, and suction is equipped in each benzene absorber 20
Attached dose, adsorbent is activated carbon fiber filler in benzene absorber 20, and adsorbent reactivation temperature is maintained at 90~100 DEG C, and each benzene is inhaled
Adnexa 20 is equipped with absorption air inlet, absorption gas outlet, the absorption air inlet of each benzene absorber 20 with three-level hydrogen chloride absorption
Second gas outlet of device connects.
In the present embodiment, spray absorption unit includes the first spray column 21, Sprayer Circulation slot 22, Sprayer Circulation pump 23, the
One spray column is equipped with the first air inlet, the first gas outlet, the first inlet, the first liquid outlet, and spray is equipped in Sprayer Circulation slot 22
Drench liquid, 22 liner furans Corrosion Protection of Fiber Reinforced Plastics layer of Sprayer Circulation slot, Sprayer Circulation slot 22 be equipped with the second inlet, the second liquid outlet,
Second gas outlet, the second gas outlet are connect with the first air inlet, the first air inlet absorption outlet with each benzene absorber 20 respectively
Mouth connection, the first inlet are connect by Sprayer Circulation pump 23 with the second liquid outlet, and the first liquid outlet is connect with the second inlet.
First spray column 21 uses metal material packed tower, and its filler uses woven wire corrugated plate packing.Into the first spray column
21 absorbing liquids are 32% liquid caustic soda, and 21 gaseous phase outlet of the first spray column contains benzene≤0.5ppm, HCl (g)≤0.5ppm.
Working principle of the present invention is as follows：2000~6000ppm of benzene Benzene Chlorides, two sections of tail gas will be contained and pass sequentially through benzene absorption
Unit, hydrogen chloride absorption unit, benzene absorbing unit, spray absorption unit, benzene and Benzene Chloride organic gas in benzene absorptive unit and
It is absorbed in benzene absorbing unit, hydrogen chloride gas is absorbed in hydrogen chloride absorption unit and spray absorption unit, remaining lazy
Property a gas high position emptying.
Two sections of tail gas of Benzene Chloride containing benzene are sent into present invention dress after one section of recirculated water and two sections of chilled brine condensations
Absorption system is set, most of benzene is absorbed by substandard products Benzene Chloride absorbing liquid in tail gas, and most of hydrogen chloride gas is by tap water or height
Pure water water absorbs, and obtains selling outside 31~33% (wt) by-product hydrochloric acids, then tail gas enters benzene absorber, and benzene and Benzene Chloride etc. are organic
Gas and a small amount of hydrogen chloride gas are adsorbed by adsorbent, and residual gas passes through and the emptying of alkali spray column rear high-lying, adsorbent are full
Use hot recycling spare with rear.Tail gas direction of travel is with absorbing liquid direction of travel on the contrary, ensureing fresh absorbing liquid and afterbody
Tail gas is in contact, and reduce needs removing constituent content to greatest extent in tail gas, and fresh material enters the other side from side and produces, and realizes
Device continuous and stable is run, and gas-liquid mixed effect is effectively ensured in pump forced circulation.Set of device can correspond to more chlorinators, operation
It is elastic big, it is that industry inner exhaust gas handles one of optimal device.
Two sections of exhaust gas processing devices in a kind of benzene chloride production proposed by the present invention make full use of two lists of absorption and absorption
The characteristics of atom operation, absorption operation are operated suitable for big concentration of component, and treating capacity is big, and low energy consumption, and adsorption operations can be into one
Step reduces the content of organics in tail gas, and tail gas is made to reach discharge standard.Apparatus of the present invention overall efficiency is high and low energy consumption, operation
It is at low cost, it can accomplish to greatest extent safe and environment-friendly, nuisanceless.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. two sections of exhaust gas processing devices in a kind of benzene chloride production, which is characterized in that including benzene absorptive unit, hydrogen chloride absorption list
Member, benzene absorbing unit, spray absorption unit, wherein：
Benzene absorptive unit include level-one benzene absorption plant, two level benzene absorption plant ..., n grades of benzene absorption plants, m grades of benzene absorb dress
M grades of benzene absorption towers, m grades of benzene circulating slots, m grades of benzene circulating pumps are installed, m grades of benzene absorption towers are equipped with m towers air inlet, m towers
Gas outlet, m towers inlet and m tower liquid outlets, m grades of benzene circulating slots are interior to be equipped with benzene absorbing liquid, and m grades of benzene circulating slots are equipped with m
The m towers inlet of slot inlet, m slot liquid outlets, m grades of benzene absorption plants is connected by m grades of benzene circulating pumps and m slot liquid outlets
It connects, the m towers liquid outlet of m grades of benzene absorption plants is connect with m slot inlets, the m towers gas outlet of m grades of benzene absorption plants and m+
The m+1 tower air inlets connection of 1 grade of benzene absorption plant；Wherein：N, m is natural number, n>m≥1；
Hydrogen chloride absorption unit include level-one hydrogen chloride absorption device, secondary chlorination hydrogen absorption plant ..., x grades of hydrogen chloride absorptions
Device, y grades of hydrogen chloride absorption devices are equipped with y grades of hydrogen chloride absorption towers, y grades of hydrogen chloride circulating slots, y grades of hydrogen chloride circulating pumps, y grades
Hydrogen chloride absorption tower is equipped with y towers gas access, y towers gas vent, y towers liquid inlet, y tower liquid outlets, y grades of chlorine
To change and is equipped with hydrogen chloride absorption liquid in hydrogen circulating slot, y grades of hydrogen chloride circulating slots are equipped with y tank liquids entrance, y tank liquids export,
First tower gas access of level-one hydrogen chloride absorption device is connect with the n-th tower gas outlet of n grades of benzene absorption plants, y grades of hydrogen chloride
The y towers liquid inlet of absorption plant is connected by y grades of hydrogen chloride circulating pumps and the outlet of y tank liquids, y grades of hydrogen chloride absorption dresses
The y towers liquid outlet set is connect with y tank liquid entrances, the y towers gas vent of y grades of hydrogen chloride absorption devices with y+1 grades
The y+1 towers gas access of hydrogen chloride absorption device connects；Wherein：X, y is natural number, x>y≥1；
Benzene absorbing unit includes the benzene absorber of multiple parallel connections, and adsorbent is equipped in each benzene absorber, and each benzene absorber is all provided with
There are absorption air inlet, absorption gas outlet, the xth tower gas of the absorption air inlet of each benzene absorber with x grades of hydrogen chloride absorption devices
Body outlet connection；
Spray absorption unit includes the first spray column, Sprayer Circulation slot, Sprayer Circulation pump, and the first spray column is equipped with the first air inlet
Mouth, the first gas outlet, the first inlet, the first liquid outlet, Sprayer Circulation slot is interior to be equipped with spray liquid, and Sprayer Circulation slot is equipped with second
Inlet, the second liquid outlet, the first air inlet are connect with the absorption gas outlet of each benzene absorber respectively, and the first inlet passes through spray
Leaching circulating pump is connect with the second liquid outlet, and the first liquid outlet is connect with the second inlet.
2. two sections of exhaust gas processing devices in benzene chloride production according to claim 1, which is characterized in that m grades of benzene absorption towers
Gas-liquid separation chamber is absorbed equipped with m grades of benzene, m towers liquid outlet, m towers gas outlet absorb gas-liquid separation chamber with m grades of benzene and be connected.
3. two sections of exhaust gas processing devices in benzene chloride production according to claim 1, which is characterized in that y grades of hydrogen chloride are inhaled
Receive tower be equipped with y grades of hydrogen chloride absorption gas-liquid separation chamber, y towers liquid outlet, y towers gas vent with y grades of hydrogen chloride absorptions
Gas-liquid separation chamber is connected.
4. two sections of exhaust gas processing devices in benzene chloride production according to any one of claim 1-3, which is characterized in that spray
It drenches circulating slot and is equipped with the second gas outlet, the second gas outlet is connect with the first air inlet.
5. two sections of exhaust gas processing devices in benzene chloride production according to any one of claim 1-3, which is characterized in that m
The m grade benzene circulating slots of grade benzene absorption plant are equipped with m slots gas outlet, the m+1 of m slots gas outlet and m+1 grades of benzene absorption plants
Tower air inlet connects, and the n-th slot gas outlet is connect with the first tower gas access of level-one hydrogen chloride absorption device；M grades of benzene circulating slots
It is connected to m+1 grades of benzene circulating slots and the benzene absorbing liquid overflow in m+1 grades of benzene circulating slots enters m grades of benzene circulating slots.
6. two sections of exhaust gas processing devices in benzene chloride production according to any one of claim 1-3, which is characterized in that chlorine
It further includes the second spray column to change hydrogen absorptive unit, the second spray column be equipped with the second air inlet, the second gas outlet, third inlet,
Third liquid outlet, the second air inlet are connect with the xth tower gas vent of x grades of hydrogen chloride absorption devices respectively, the second gas outlet point
It is not connect with the absorption air inlet of each benzene absorber, the x grade hydrogen chloride circulating slots of third liquid outlet and x grades of hydrogen chloride absorption devices
Connection.
7. two sections of exhaust gas processing devices in benzene chloride production according to claim 6, which is characterized in that y grades of hydrogen chloride are inhaled
The y grade hydrogen chloride circulating slots of receiving apparatus are equipped with y slot gas vents, y slots gas vent and y+1 grades of hydrogen chloride absorption devices
Y+1 towers gas access connects, and the xth slot gas vent of x grades of hydrogen chloride absorption devices is connect with the second air inlet；Y grades of chlorinations
Hydrogen circulating slot is connected to y+1 grades of hydrogen chloride circulating slots and the hydrogen chloride absorption hydrorrhea in y+1 grades of hydrogen chloride circulating slots flows into y grades of chlorine
Change hydrogen circulating slot.
8. two sections of exhaust gas processing devices in benzene chloride production according to any one of claim 1-3, which is characterized in that m
The m grade benzene absorption tower of grade benzene absorption plant is equipped with m grades of a cooling medium inlets and m grades of a cool down media outlet.
9. two sections of exhaust gas processing devices in benzene chloride production according to any one of claim 1-3, which is characterized in that y
The y grade hydrogen chloride absorption towers of grade hydrogen chloride absorption device are equipped with y grades of b cooling medium inlets and y grades of b cool down media outlet.
10. two sections of exhaust gas processing devices in benzene chloride production according to any one of claim 1-3, which is characterized in that
Benzene absorptive unit includes level-one benzene absorption plant, two level benzene absorption plant and three-level benzene absorption plant；Hydrogen chloride absorption unit packet
Include level-one hydrogen chloride absorption device, secondary chlorination hydrogen absorption plant and three-level hydrogen chloride absorption device.
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| CN106237795A (en) * | 2016-08-31 | 2016-12-21 | 安徽八化工股份有限公司 | Two-stage nitration exhaust gas processing device in a kind of benzene chloride production |
| CN110237694A (en) * | 2019-03-29 | 2019-09-17 | 中国医药集团联合工程有限公司 | A kind of VOCs exhaust collection governing system |
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| CN102502498A (en) * | 2011-10-19 | 2012-06-20 | 甘肃银达化工有限公司 | Method for separating and recovering chlorine and oxygen of hydrogen chloride oxidation gas mixture by use of PSA (Pressure Swing Adsorption) technology |
| CN105080307A (en) * | 2014-05-12 | 2015-11-25 | 陈汇宏 | Desulfurization and denitrification method for tail gas, used equipment and product application thereof |
| CN105597535A (en) * | 2016-03-29 | 2016-05-25 | 南京工业大学 | Treatment method for mixed organic waste gas containing chlorine, hydrogen chloride and oxynitride |
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| JPS5515657A (en) * | 1978-07-21 | 1980-02-02 | Mitsubishi Heavy Ind Ltd | Method of removing mal-odorous component in exhaust gas |
| CN102502498A (en) * | 2011-10-19 | 2012-06-20 | 甘肃银达化工有限公司 | Method for separating and recovering chlorine and oxygen of hydrogen chloride oxidation gas mixture by use of PSA (Pressure Swing Adsorption) technology |
| CN105080307A (en) * | 2014-05-12 | 2015-11-25 | 陈汇宏 | Desulfurization and denitrification method for tail gas, used equipment and product application thereof |
| CN105597535A (en) * | 2016-03-29 | 2016-05-25 | 南京工业大学 | Treatment method for mixed organic waste gas containing chlorine, hydrogen chloride and oxynitride |
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