CN209605177U - A kind of organosilicon organic exhaust gas containing chlorine, effluent resource environment-friendly disposal system - Google Patents
A kind of organosilicon organic exhaust gas containing chlorine, effluent resource environment-friendly disposal system Download PDFInfo
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- CN209605177U CN209605177U CN201920139541.0U CN201920139541U CN209605177U CN 209605177 U CN209605177 U CN 209605177U CN 201920139541 U CN201920139541 U CN 201920139541U CN 209605177 U CN209605177 U CN 209605177U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses a kind of organosilicon organic exhaust gas containing chlorine, effluent resource environment-friendly disposal system, belong to changing rejected material to useful resource treatment and purification environment protection field, by burning workshop section, waste heat recycle section, SiO 2 powder recycle section, dilute hydrochloric acid recycle section, tail gas environment protection standard discharge section is formed, the burning workshop section is connected with waste heat recycle section, SiO 2 powder recycle section is set after waste heat recycle section, SiO 2 powder recycle section is connected with dilute hydrochloric acid recycle section, tail gas environment protection standard discharge section is arranged after dilute hydrochloric acid recycle section, the flue gas of generation environment protection standard after the processing of tail gas environment protection standard discharge section, atmosphere is discharged by chimney, and realize organosilicon organic exhaust gas containing chlorine, the resource utilization of low boiling point polymer waste liquid, while Mist heat recovering, dilute hydrochloric acid is also recycled With the chemical intermediates such as SiO 2 powder.And this system compact layout, occupied area is small, and it is strong that equipment runs sustainability.
Description
Technical field
The utility model belongs to exhaust-gas resource processing environment protection field, and in particular to arrives a kind of organosilicon organic waste containing chlorine
Gas, effluent resource environment-friendly disposal system.
Background technique
China's organosilicon material industry is in a quick developing stage, due to organosilicon material have high temperature resistant,
The excellent properties such as moisture-proof, insulation, weather-resistant, physiological inertia, so that the every field of organosilicon material and national economy ceases
Manner of breathing closes, and is widely used in weaving, electronic apparatus, petroleum, chemical industry, light industry, building, metallurgy, machinery, military project, office equipment, traffic
The fields such as transport, medicine, food processing and daily-use chemical industry play the work to become more and more important to high-tech and the upgrading and optimization of industrial structure
With.The characteristics of organosilicon industry is the product processing of the monomer production and dispersion concentrated, since monomer produces skill with higher
Art barrier, so that the major criterion for measuring Silicone Industry level is monomer production level.Prepare silicone oil, silicon rubber,
The raw material of silicone resin and silane coupled material is mainly the organic silicon monomers such as methylchlorosilane, phenyl chlorosilane, wherein methyl chloride
The dosage of silane accounts for 90% or more of entire monomer total amount.
With the rapid development of organosilicon industry, the scale of organosilicon industry in all parts of the country is also growing, organosilicon row
The processing problem of the organic exhaust gas containing chlorine generated in industry production process is also following, at this stage the sector organic exhaust gas containing chlorine
Processing mode is mostly direct alkali cleaning or washing process, also has and is adsorbed using adsorbent, not only treatment effect it is bad and also without
Ji, wastes a large amount of resource, the byproduct of generation carries out sustaining economic losses secondary treatment.As an improvement, the patent No.
The patent of CN201010522959 provides the burning treatment process of containing chlorosilane in polysilicon production exhaust gas, waste liquid, by polycrystalline
In silicon production process, exhaust gas of the discharge containing chlorosilane, waste liquid use natural gas as fuel, in 900-1000 in combustion furnace
DEG C high temperature and 0.01-0.06 kilograms of pressure condition under, by the chlorosilane pyrohydrolysis in exhaust gas, waste liquid, generate and be easy
The SiO of processing2, HCl and a small amount of Cl2Equal substances recycle dilute hydrochloric acid by depickling and alkali cleaning process, hydrolysising alkali can be overcome to inhale
It receives and milk of lime Ca (OH)2Neutralization precipitation processing is not thorough, and chloride ion can not remove, the serious problem of secondary pollution, still
The technique has three, firstly, the not set chilling tower after waste heat boiler, leads in flue gas that there may be dioxins to have
Noxious material, next not set denitrification apparatus of the technique, and also acid solution overflow pipe is located at after caustic wash tower, leads to a small amount of HCl gas
Caustic wash tower is escaped out in and when lye pH value is close to 7, is discharged into atmosphere with flue gas, therefore the flue gas being discharged is difficult environment protection standard,
Third, the technique are unable to the SiO 2 powder of by-product high-purity.
Summary of the invention
The purpose of the utility model is to provide a kind of organosilicon organic exhaust gas containing chlorine, effluent resource environmental protection treatment system
System, to solve the problems, such as that above-mentioned background technique proposes.
To achieve the goals above, the utility model is the following technical schemes are provided: a kind of organosilicon organic exhaust gas containing chlorine, useless
Liquid recycling environment-friendly disposal system, including burn workshop section, waste heat recycle section, SiO 2 powder recycle section, dilute hydrochloric acid time
Knock off section, tail gas environment protection standard discharge section, burns and waste heat recycle section is set after workshop section, be arranged after waste heat recycle section
SiO 2 powder recycle section, SiO 2 powder recycle section are connected with dilute hydrochloric acid recycle section, and dilute hydrochloric acid recycles work
Tail gas environment protection standard discharge section is set after section.The burning workshop section is made of incinerator and related subsidiary engine, the burning
Furnace carries out high temperature incineration processing to organosilicon organic exhaust gas containing chlorine, low boiling point polymer waste liquid, passes through the temperature arranged on incinerator
The furnace entering volume of measuring point control auxiliary fuel and combustion air is spent to guarantee the adiabatic combustion temperature in incinerator.In order to ensure burning
Chloride ion is converted into HCl in organic matter in journey, sprays into saturated vapor at incinerator burner position and enters primary zone, saturated vapor
Straying quatity can be according to the Cl in flue gas after measurement packed absorber2Gas content and Cl2Gas, which is converted into needed for HCl, satisfies
It is determined with quantity of steam, specific balanced type is as follows: 4Cl2+CH4+2H2O→CO2+8HCl.The waste heat recycle section is by two sections
Formula fire tube waste heat boiler, oxygen-eliminating device, boiler feed pump, economizer composition, the oxygen-eliminating device by water supply carry out deoxygenation after through boiler
Water supply is pumped to economizer heating, and economizer is arranged in SCR denitration device rear portion, further recycles waste heat from tail gas after SCR denitration,
Boiler feedwater after economizer exchanges heat is sent to two-part fire tube waste heat boiler and carries out high temperature section UTILIZATION OF VESIDUAL HEAT IN.The dioxy
SiClx Powder Recovery workshop section by ceramic film dust-remover, fall ash cellar, 1# displacement storehouse, 2# displacement storehouse, ash-storing bin, 1# plate and frame filter press,
2# plate and frame filter press composition, it is 5 ~ 200 μm that the ceramic film dust-remover, which is 30% ~ 90%, aperture by the percent opening of multiple groups parallel connection,
Porous ceramics composite membrane composition filter element, that is, ceramic-film tube, braced frame, back-blowing device, ash dropping hopper and displacement storehouse,
Ash-storing bin composition.That collects enters displacement storehouse through ash dropping hopper containing HCl gas SiO 2 powder, using compression in displacement storehouse
Nitrogen goes out the HCl gas displacement contained in silicon dioxide powder, and the silicon dioxide powder after displacing HCl gas enters storage ash
Storehouse is rinsed by technical pure water purification and is sent into neutralisation treatment in neutralization pond, causes to damage to equipment to prevent HCl gas to be condensed into hydrochloric acid
Evil, the equipment steam tracing in displacement storehouse, it is ensured that inner wall temperature is higher by the acid dew-point temperature of HCl in displacement storehouse.By carbon is added
The neutral dreg slurry containing silicon dioxide powder after sour sodium or sodium hydroxide solution neutralize recycles two after plate and frame filter press filters pressing
Silica filter cake further the chemical materials such as deep processing manufacture white carbon black, filtrate can be sent into cesspool and recycle.Described is dilute
HCl recovery workshop section is by graphite chilling tower, high-order water pot, graphite heat exchanger, chilling circulating pump, flue gas interface channel, acid solution overflow
Pipe, packed absorber, cyclic absorption pump, neutralization pond, spent acid delivery pump a, waste acid pot, spent acid delivery pump b, filtrate tank, spent acid are defeated
C, acid storage tank, hydrochloric acid rear pump, cesspool, sewage are pumped out draws pump group at the graphite chilling tower top is allocated as chilling
While device, lower part is allocated as a kind of efficient HCl absorption plant, passes through graphite chilling according to physical property HCl soluble easily in water
Tower, packed absorber two-stage absorption plant greatly improve the absorption efficiency of HCl.By using in the groove tank of packed absorber bottom
Graphite chilling tower, the packed absorber iterative cycles that absorbing liquid, that is, dilute hydrochloric acid is pumped into, in containing for graphite chilling tower bottom discharge
There is concentration of hydrochloric acid in the dreg slurry of silicon dioxide powder that can further decrease graphite urgency if necessary to higher concentration up to 20% or more
Flue-gas temperature and increase packed absorber bottom groove tank interior suction receive liquid, that is, dilute hydrochloric acid circulated sprinkling number to realize in cold tower.Filler
Absorbing liquid, that is, dilute hydrochloric acid sprays flue gas by being pumped into packed absorber packing layer top in absorb the bottom of the tower groove tank, in flue gas
HCl is further absorbed by moisture content in absorbing liquid, meanwhile, packed absorber multilayer Bauer packing layer made of ring sintering,
Liquid, that is, dilute hydrochloric acid, which is received, by packed absorber bottom groove tank interior suction repeatedly recycles the absorptivity greatly improved to HCl in flue gas,
One or two layers Bauer packing layer is arranged again in packing material absorbing top of tower, is more fully absorbed in flue gas and is escaped using clear water spray
The HCl of ease.It is sent into filtrate tank by the filtrate after plate and frame filter press filters pressing, the precipitating through filtrate tank contains filtrate tank lower part
The dreg slurry of silicon dioxide powder sends plate and frame filter press filters pressing back to, and the acid solution of filtrate tank top after precipitation is sent in acid storage tank,
To further purification processes or directly use.Packed absorber bottom groove tank liquid level is relative to graphite chilling tower bottom groove tank liquid
Position wants high, may be implemented using liquid level difference between the two by acid solution overflow pipe packing material absorbing tower bottom is certain density dilute
Acid solution imports in graphite chilling tower bottom groove tank, and Equilibrium can be achieved without pumping.The tail gas environment protection standard discharges work
Section is by alkali cleaning packed tower, alkali liquid tank, flue gas reheater, spray urea grid, static mixer, urea liquid preparation tank, urea
Solution transfer pump, urea liquid storage tank, urea liquid spray pump, SCR denitration device, chimney composition, depickling packed tower and lye
Tank forms circulation loop, and sour gas remaining in removal flue gas is neutralized by the lye in alkali cleaning packed tower, de- by SCR
The medium temperature or low-temperature denitration catalyst arranged in nitre device carry out the denitration of selective catalytic reduction oxidizing process, remove and carry in flue gas
Nitrogen oxides, the tail gas of environment protection standard is discharged into atmosphere by chimney.
Preferably, the two-part fire tube waste heat boiler is by front smoke box, intermediate smoke box, rear smoke box, soot blower, two sections of fire
Heating surface of tubes, drum and steam-water pipeline composition, the intermediate smoke box and two-part fire tube waste heat boiler of two-part fire tube waste heat boiler
Rear smoke box lower disposed have ash dropping hopper, rely on the SiO 2 powder that blows off of gravitational settling and soot blower for collecting,
Have in ash dropping hopper lower disposed and similarly replaces storehouse, ash-storing bin, the two-part fire tube with ceramic film dust-remover ash dropping hopper lower part
Waste heat boiler drum is connected with the economizer after SCR denitration device is placed on by steam-water pipeline, will be added with flue gas through economizer
Boiler feedwater after heat is sent in waste heat boiler drum.
Preferably, the packed absorber is pumped by cyclic absorption and is followed in tower top spray equipment and the formation of lower section diluted acid storage tank
Loop back path further absorbs HCl and Cl using the industry water of supplement2Gas.
Preferably, the alkali cleaning packed tower and the alkali liquid tank of lower section pass through depickling circulating pump formation closed circuit；The SCR
Medium temperature built in denitrification apparatus or low-temperature denitration catalyst carry out the denitration operation of selective catalytic reduction oxidizing process.
The beneficial effects of the utility model are, guarantee that organosilicon has containing chlorine by the cooperation of insulation incinerator and chilling tower
It is poisonous and harmful in machine exhaust gas, low boiling point polymer waste liquid thoroughly to destroy by fire, waste heat recycle section, SiO 2 powder recycle section and
The arrangement of dilute hydrochloric acid recycle section has recycled mass energy and chemical intermediate, realizes resource circulation utilization, turns waste into wealth, and saves
Operating cost, reduces resource waste, and the flue gas of generation complies fully with state after the processing of tail gas environment protection standard discharge section
The emission request of family's environmental protection standard, and this system compact layout, occupied area is few, and continuous working period is long, is chloride containing work
Enterprise solves the difficult problem of environmental protection of sustainable development.
Detailed description of the invention
Fig. 1 is the overall structure diagram of this system；
In figure, 1, incinerator；2, two-part fire tube waste heat boiler；3, ceramic film dust-remover；4, ash cellar is fallen；5,1# is replaced
Storehouse；5-1,2# displacement storehouse；6,1# ash-storing bin；6-1,2# ash-storing bin；7, graphite chilling tower；8, high-order water pot；9, graphite heat exchanger；
10, chilling circulating pump；11, flue gas interface channel；12, acid solution overflow pipe；13, packed absorber；14, cyclic absorption pumps；15, alkali
Wash packed tower；16, alkali liquid tank；17, depickling circulating pump；18, flue gas reheater；19, urea grid is sprayed；20, static mixer；
21, urea liquid preparation tank；22, urea liquid delivery pump；23, urea liquid storage tank；24, urea liquid spray pump； 25,SCR
Denitrification apparatus；26, economizer；27, oxygen-eliminating device；28, boiler feed pump；29, neutralization pond；30, spent acid delivery pump a；31,1# sheet frame
Filter press；31-1,2# plate and frame filter press；32, waste acid pot；33, spent acid delivery pump b；34, filtrate tank；35, spent acid rear pump c；
36, acid storage tank；37, hydrochloric acid rear pump；38, cesspool；39, sewage draws pump；40, chimney；
(1) organosilicon organic exhaust gas containing chlorine, (2) incinerator auxiliary fuel, (3) incinerator combustion air, (4) saturation are steamed
Vapour, (5) tracing steam, (6) compressed nitrogen, (7) tracing steam, (8) flushing water, (9) high-order water pot supplement water, (10) circulation are cold
Water waterborne, (11) cooling water return, (12) packed absorber supplement water, (13) flue gas reheater auxiliary fuel,
(14) flue gas reheater combustion air, (15) static mixer supplement water, (16) sodium carbonate, (17) neutral silica filter
Cake, (18) dilute hydrochloric acid, (19) sodium hydroxide solution, (20) alkali liquid tank supplement water, (21) sewage, (22) urea liquid preparation tank urine
Element, (23) urea liquid preparation tank supplement water, (24) boiler feedwater, (25) oxygen-eliminating device low-pressure steam, (26) smoke stack emission mouth,
(27) low boiling point polymer waste liquid, (28), saturated vapor spray into interface.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment: a kind of organosilicon organic exhaust gas containing chlorine, effluent resource environment-friendly disposal system, incinerator 1 and two-part
Fire tube waste heat boiler 2 is connected to, and the left end of two-part fire tube waste heat boiler 2 is connected to by pipeline with ceramic film dust-remover 3, two-part
2 lower end of fire tube waste heat boiler is connected with 1# displacement storehouse 5；5 lower end of 1# displacement storehouse is connected with 1# ash-storing bin 6, and 1# ash-storing bin 6 is communicated to
Neutralization pond 29；The upper end of the ceramic film dust-remover 3 is connected to 7 upper end of graphite chilling tower, the lower end of ceramic film dust-remover 3 with
It falls ash cellar 4 to be connected, the lower end for falling ash cellar 4 is connected with 2# displacement storehouse 5-1, lower end and the 2# ash-storing bin 6-1 phase of 2# displacement storehouse 5-1
Even, 2# ash-storing bin 6-1 is communicated to neutralization pond 29；The center of graphite chilling tower 7 passes through pipeline and flue gas interface channel 11 respectively
It is connected to high-order water pot 8 and packed absorber 13, the side of 7 bottom of graphite chilling tower passes through pipeline and chilling circulating pump 10 and stone
The black formation of heat exchanger 9 is connected by circulation structure, and the other side is connected to by acid solution overflow pipe 12 with packed absorber 13；The graphite
9 upper end of heat exchanger is connected to the waste acid pot 32 of lower section by pipeline；The waste acid pot 32 passes through spent acid delivery pump b33 and 2# sheet frame
Filter press 31-1 is connected, and there are two outlet on 2# plate and frame filter press 31-1, one of outlet is sequentially communicated 34 He of filtrate tank
Acid storage tank 36, the two are separately installed with spent acid rear pump c35 and hydrochloric acid rear pump 37 later, the neutralization of another outlet and lower section
Pond 29 is connected；The neutralization pond 29 is also connected to by spent acid delivery pump a30 with 1# plate and frame filter press 31,1# plate and frame filter press 31
It is connected with the cesspool 38 of the other side；The upper end of the packed absorber 13 is connected to by pipeline with alkali cleaning packed tower 15,
15 upper end of alkali cleaning packed tower is connected to flue gas reheater 18, and alkali cleaning packed tower 15 is also connected by pipeline and the circulation of alkali liquid tank 16
It connects, alkali liquid tank 16 is connected with the cesspool 38 of lower section；The lower section of flue gas reheater 18 is provided with arrangement spray urea grid 19, spray
Urea grid 19 is connected with static mixer 20 and SCR denitration device 25 respectively；Static mixer 20 is sprayed by urea liquid
Leaching pump 24 is connected with urea liquid storage tank 23, and urea liquid storage tank 23 passes through urea liquid delivery pump 22 and urea liquid preparation tank
21 are connected；SCR denitration device 25 is connected with 26 bottom end of economizer, and economizer 26 is by boiler feed pump 28 and oxygen-eliminating device 27
It is connected, economizer 26 is there are two outlet, and one is connected with preposition two-part fire tube waste heat boiler 2, the cigarette of another and postposition
Chimney 40 is connected.
The two-part fire tube waste heat boiler 2 by front smoke box, intermediate smoke box, rear smoke box, soot blower, two sections of fire tubes by
Hot face, drum and steam-water pipeline composition, intermediate smoke box and rear smoke box lower disposed have ash dropping hopper, province's coal of the drum and postposition
Device 26 is connected.
The ceramic film dust-remover 3 is made of ceramic-film tube, braced frame, back-blowing device, ash dropping hopper.
The graphite chilling tower 7 divides for two parts, and top is divided into quenching apparatus, and lower part is divided into absorption plant.
The packed absorber 13 shape between the spray equipment and lower part diluted acid storage tank of tower top by cyclic absorption pump 14
At circulation loop.
There are three entrance and two outlets, three entrances to supplement industry water, NaOH respectively and come from for the alkali liquid tank 16
The depickling waste water of alkali cleaning packed tower 15, one outlet pass through depickling circulating pump 17 respectively and pump lye to alkali cleaning packed tower 15, separately
One is connected to cesspool 38；The alkali cleaning packed tower 15 and the alkali liquid tank 16 of lower section are closed back by the formation of depickling circulating pump 17
Road；Middle temperature catalyst built in the SCR denitration device 25.
Waste gas treatment process: organosilicon organic exhaust gas containing chlorine (1) is sent into incinerator 1 by exhaust gas burner and is burned,
Amount by adjusting incinerator auxiliary fuel (2) and incinerator combustion air (3) keeps the insulation incineration temperature in incinerator 1
At >=1200 DEG C, 1 size of burner hearth of incinerator and height are reasonably arranged, guarantee gas residence time >=2s, by high temperature incineration
Afterwards, a certain amount of HCl gas and SiO 2 powder are contained in the high-temperature flue gas of generation, high-temperature flue gas subsequently enters two-part fire
Waste heat recycling is carried out in pipe waste heat boiler 2.
Two-part fire tube waste heat boiler 2 uses two sections of heating surfaces, and centre is connected by intermediate smoke box, by reasonable smoke pipe
Flow velocity simultaneously arranges soot blower in rational position, guarantees that silicon dioxide powder will not be generated in 2 smoke pipe of two-part fire tube waste heat boiler
End accumulation, generates the phenomenon that blocking；Ash bucket there are two arrangements on the intermediate smoke box of two-part fire tube waste heat boiler 2 and rear smoke box, two
Silicon oxide powder is collected into ash bucket, and unlatching ash bucket lower part valve makes SiO 2 powder fall into two sections after accumulating a period of time
In the 1# displacement storehouse 5 of 2 lower part of formula fire tube waste heat boiler, by being passed through compressed nitrogen (6) into 1# displacement storehouse 5 to silicon dioxide powder
The micro HCl gas carried in end is replaced, and the gas after displacement is discharged into the cigarette after two-part fire tube waste heat boiler 2 exports
In road, it is disposed with heating device in 1# displacement storehouse 5, equipment is caused to corrode to prevent HCl from moisture condensation occurs, is passed through in 1# displacement storehouse 5
SiO 2 powder after crossing displacement falls into the 1# ash-storing bin 6 of lower part and stores.
Flue gas enters ceramic membrane after high-temperature flue-gas is reduced to 550 DEG C by 1200 DEG C by two-part fire tube waste heat boiler 2
In deduster 3, ceramic film dust-remover 3 is made of external support structure, inner ceramic membrane tube, back-blowing device and ash dropping hopper, ceramics
Membrane tube has very high separative efficiency to SiO 2 powder, and the SiO 2 powder carried in flue gas, which is largely collected, to be got off to fall
Enter in the ash dropping hopper of lower part, falling in ash cellar 4 for ceramic 3 lower part of film dust-remover is then fallen into, when the silicon dioxide powder fallen in ash cellar 4
When end is stored into a certain amount of, the valve for falling 4 lower part of ash cellar is opened, the SiO 2 powder fallen in ash cellar 4 is made to fall into the 2# of lower part
It replaces in the 5-1 of storehouse, by being passed through (6) compressed nitrogen into 2# displacement storehouse 5-1 to the micro HCl gas carried in SiO 2 powder
Body is replaced, and the gas after displacement is discharged into the flue after two-part fire tube waste heat boiler 2 exports, 2# displacement storehouse 5-
1 is disposed with heating device, the silicon dioxide powder to prevent HCl from dewing corrosion equipment occurs, in 2# displacement storehouse 5-1 after replacing
End falls into the 2# ash-storing bin 6-1 of lower part and stores.
For the generation for containing dioxin harmful substance, 550 DEG C of flue gases that ceramic film dust-remover 3 flows out enter graphite chilling
Chilling is carried out in tower 7, is guaranteed that 550 DEG C of flue gases are lowered to 60 DEG C in 1s, was sharply cooled down dioxin harmful substance most
Good generation temperature range.The graphite chilling tower 7, which divides, sprays quench zone and lower part diluted acid storage tank two parts for top, wherein on
Portion's spray quench zone is made of graphite shell, nozzle, adapter tube and water-cooling jacket etc., and lower part diluted acid storage tank shell uses inner surface lining
There is the carbon steel of natural rubber, to prevent hcl corrosion.In lower part, diluted acid reservoir bottom is provided with liquid-phase outlet, the waist of lower part diluted acid storage tank
Portion is gas vent, and diluted acid liquid level is monitored on-line by far transmission level meter, and can or hand automatic according to system circulation situation
Dynamic to adjust liquid level, the upper limit of liquid level, which is arranged, has certain distance away from gas vent, and avoidable liquid phase acid solution is excessive, and flue gas is anxious from graphite
Enter top at the top of cold tower 7 and spray quench zone, 7 top layout of graphite chilling tower has several chilling water spray guns, flue gas and chilled water (chw)
Cool down rapidly after the spray quench zone contact mixing of top, the HCl gas a part carried in flue gas is fallen on by chilled water (chw) absorption
In the diluted acid storage tank of lower part, 7 top of graphite chilling tower spray quench zone is disposed with water-cooling jacket, passes through circulating cooling water waterborne (10)
Cooling protection is carried out to graphite, cooling water return (11) returns in plant area's cooling tower, in 7 lower part diluted acid storage tank of graphite chilling tower
Diluted acid extract to be sent into graphite heat exchanger 9 by chilling circulating pump 10 heat exchange drop carried out by circulating cooling water waterborne (10)
Temperature is returned in plant area's cooling tower in cooling water return (11) of the graphite heat exchanger 9 after heat exchange, by graphite heat exchanger 9
Diluted acid a part after heat exchange, which is sent back in graphite chilling tower 7, is used as chilling, and a part is sent in flue gas interface channel 11 and removed
Dirt, when recycling the sufficient concentrations of diluted acid of generation through over-quenching, another pipe valve is opened after chilling circulating pump 10, will be dilute
Acid is sent into acid storage tank 32, and the chilled water (chw) of graphite chilling tower 7 passes through high-order water pot 8 and supplemented, and the liquid level of high-order water pot 8 passes through
High-order water pot supplement water (9) is maintained, and due to the SiO 2 powder that carries in flue gas, some by chilled water (chw) sweeps away band
Enter into diluted acid, cause the diluted acid generated poor quality, therefore the diluted acid in acid storage tank 32 is conveyed by spent acid delivery pump b33
Plate compression is carried out into 2# plate and frame filter press 31, the filtrate after filters pressing enters in filtrate tank 34, and filter cake is admitted in neutralization pond
Residual diluted acid in filter cake is neutralized, the diluted acid in filtrate tank 34 is transported in acid storage tank 36 by spent acid rear pump c35
Storage, when needed will be outside dilute hydrochloric acid (18) transmitting system by hydrochloric acid rear pump 37.
Further to remove the SiO 2 powder carried in flue gas, the flue gas of the outlet of graphite chilling tower 7 discharge is entered
In flue gas interface channel 11, pass through the remaining SiO 2 powder that will be carried in flue gas to water spray at 11 aditus laryngis of flue gas interface channel
It is removed operation, for shower water after the pump of chilling circulating pump 10, subsequent shower water carries part of silica powder with flue gas
Into carrying out gas-liquid separation in acid solution overflow pipe 12.This exhaust-gas resource uses gravity type acid solution overflow pipe using system, passes through
Reasonable control flue gas flow rate simultaneously carries out reasonable design to 12 structure of acid solution overflow pipe, it is ensured that optimal gas-liquid separation effect
Fruit, the water entrainment SiO 2 powder carried in flue gas pass through the water outlet of part under acid solution overflow pipe 12 under gravity
Outflow, is sent back in graphite chilling tower 7 by pipeline.
Flue gas after gas-liquid separation enters in packed absorber 13 absorbs HCl gas again, packing material absorbing
Multiple filling layers are disposed with inside tower 13,13 top of packed absorber is disposed with spray equipment, by shower water to carrying in flue gas
HCl gas absorbed again, the diluted acid generated after absorption is fallen into the storage tank of 13 lower part of packed absorber, dilute in storage tank
Acid is extracted by cyclic absorption pump 14, and a part carries out circulated sprinkling absorption, and another part is sent back in graphite chilling tower 7.To protect
Tail gas qualified discharge is demonstrate,proved, the flue gas that packed absorber 13 comes out is sent into subsequent alkali cleaning packed tower 15 and is carried out at lye depickling
It manages, is disposed with multiple filling layers inside alkali cleaning packed tower 15,15 top of alkali cleaning packed tower is disposed with spray equipment, recycles by depickling
Lye circulated sprinkling in 17 extraction alkali liquid tank 16 of pump removes the remaining acid gas carried in flue gas, when alkali liquid tank 16
When middle circulation fluid pH value reaches a certain predetermined value, opens drain valve and a part of brackish water is discharged in cesspool 38, discharge one
Valve is closed after quantitative, then by sodium hydroxide solution (19) and alkali liquid tank supplement water (20) being added into alkali liquid tank 16 to protect
Hold the concentration of lye and the water of circulated sprinkling.
Flue gas after alkali cleaning enters in flue gas reheater 18, passes through combustion product gases reheater auxiliary fuel
(13) flue gas is carried out being warming up to 220 DEG C or so, to guarantee the denitration efficiency of subsequent SCR denitration device 25.It is reheated in flue gas
Arrangement spray urea grid 19 on device 18 and the connection flue of SCR denitration device 25, by being added into urea liquid preparation tank 21
Urea (22) and urea liquid preparation tank supplement water (23) prepare the urea liquid of 50% concentration, are then conveyed by urea liquid
The urea liquid of preparation is delivered in urea liquid storage tank 23 by pump 22 to be stored, and is extracted and is urinated by urea liquid spray pump 24
The urea liquid of plain solution reservoir 23 is sent into static mixer 20, and static mixer is supplemented into static mixer 20 and supplements water
(15) urea liquid of 50% concentration is diluted to 10% concentration, then by spray urea grid 19 spray into flue in 220 DEG C of cigarettes
Gas is mixed, and mixed flue gas, which enters in SCR denitration device 25, to carry out selective-catalytic-reduction denitrified, will be taken in flue gas
The nitrogen oxides of band is reduced to water and nitrogen.
220 DEG C of flue gas is there are also more amount of residual heat after denitration, into adding in economizer 26 to deaerated water
Heat is with the amount of residual heat in recovered flue gas, and boiler feedwater (24) enters in oxygen-eliminating device 27, by being passed through low pressure into oxygen-eliminating device 27
Steam (25) carries out boiler feedwater (24) to be heated to 104 DEG C of deoxygenations, then by boiler feed pump 28 extraction deaerated water send to
The amount of residual heat carried in economizer 26 to flue gas recycles, and the boiler feedwater after heat exchange is sent to two-part fire tube waste heat boiler
In 2 drum, saturated vapor (4) are generated by the interior heat for circulating in absorption high-temperature flue gas in two sections of flue heating surfaces and send out system
Outer heat supply user of uniting uses.Flue gas after the heat exchange of economizer 26 is discharged into atmosphere by chimney 40.
SiO 2 powder in 1#/2# ash-storing bin is rinsed by flushing water (8) to be carried and is sent into neutralization pond 26, simultaneously
The filter cake containing diluted acid that 2# plate and frame filter press 31 is press-filtered out is also fed into neutralization pond 26, by the way that sodium carbonate is added into neutralization pond 26
(16) acid solution in neutralization pond 26 is neutralized, suspension a part containing SiO 2 powder after neutralization is conveyed by spent acid
Pump 30, which extracts to send, carries out final filters pressing into 1# plate and frame filter press 31, and the neutral silica filter cake (17) after filters pressing sends out battery limit (BL)
Outside, the neutral filtrate being press-filtered out is sent into cesspool 38.Sewage in cesspool 38 is neutral meta-alkali waste water, reaches one in liquid level
Pump 39 is drawn by sewage when determining height to send sewage (21) extraction to sewage treatment plant.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of organosilicon organic exhaust gas containing chlorine, effluent resource environment-friendly disposal system, it is characterised in that: incinerator (1) and two
The left end of segmentation fire tube waste heat boiler (2) connection, two-part fire tube waste heat boiler (2) passes through pipeline and ceramic film dust-remover (3)
Connection, two-part fire tube waste heat boiler (2) lower end is connected with 1# displacement storehouse (5)；1# displacement storehouse (5) lower end and 1# ash-storing bin (6)
It is connected, 1# ash-storing bin (6) is communicated to neutralization pond (29)；On the upper end of the ceramic film dust-remover (3) and graphite chilling tower (7)
End connection, the lower end of ceramic film dust-remover (3) are connected with ash cellar (4) is fallen, and fall lower end and 2# displacement storehouse (5-1) phase of ash cellar (4)
Even, the lower end in 2# displacement storehouse (5-1) is connected with 2# ash-storing bin (6-1), and 2# ash-storing bin (6-1) is communicated to neutralization pond (29)；Graphite
The center of chilling tower (7) passes through pipeline and flue gas interface channel (11) and high-order water pot (8) and packed absorber (13) respectively
Connection, the side of graphite chilling tower (7) bottom form circulation by pipeline and chilling circulating pump (10) and graphite heat exchanger (9) and connect
Binding structure, the other side are connected to by acid solution overflow pipe (12) with packed absorber (13)；Graphite heat exchanger (9) upper end is logical
Piping is connected to the waste acid pot (32) of lower section；The waste acid pot (32) passes through spent acid delivery pump b(33) and 2# plate and frame filter press
(31-1) is connected, there are two outlet on 2# plate and frame filter press (31-1), one of outlet be sequentially communicated filtrate tank (34) and
Acid storage tank (36), the two are separately installed with spent acid rear pump c(35 later) and hydrochloric acid rear pump (37), another outlet and lower section
Neutralization pond (29) be connected；The neutralization pond (29) also passes through spent acid delivery pump a(30) it is connected to 1# plate and frame filter press (31),
1# plate and frame filter press (31) is connected with the cesspool (38) of the other side；The upper end of the packed absorber (13) passes through pipeline
It is connected to alkali cleaning packed tower (15), alkali cleaning packed tower (15) upper end is connected to flue gas reheater (18), alkali cleaning packed tower (15)
It is also connected by circulation by pipeline with alkali liquid tank (16), alkali liquid tank (16) is connected with the cesspool (38) of lower section；Flue gas reheater
(18) arrangement spray urea grid (19) is provided with below, spray urea grid (19) is de- with static mixer (20) and SCR respectively
Nitre device (25) is connected；Static mixer (20) is connected by urea liquid spray pump (24) with urea liquid storage tank (23),
Urea liquid storage tank (23) is connected by urea liquid delivery pump (22) with urea liquid preparation tank (21)；SCR denitration device
(25) it is connected with economizer (26) bottom end, economizer (26) is connected by boiler feed pump (28) with oxygen-eliminating device (27), saves
Coal device (26) is there are two outlet, and one is connected with preposition two-part fire tube waste heat boiler (2), the chimney of another and postposition
(40) it is connected.
2. a kind of organosilicon organic exhaust gas containing chlorine according to claim 1, effluent resource environment-friendly disposal system, feature
Be: the two-part fire tube waste heat boiler (2) by front smoke box, intermediate smoke box, rear smoke box, soot blower, two sections of fire tubes by
Hot face, drum and steam-water pipeline composition, intermediate smoke box and rear smoke box lower disposed have ash dropping hopper, province's coal of the drum and postposition
Device (26) is connected.
3. a kind of organosilicon organic exhaust gas containing chlorine according to claim 1, effluent resource environment-friendly disposal system, feature
Be: the ceramic film dust-remover (3) is made of ceramic-film tube, braced frame, back-blowing device, ash dropping hopper.
4. a kind of organosilicon organic exhaust gas containing chlorine according to claim 1, effluent resource environment-friendly disposal system, feature
Be: the graphite chilling tower (7) is divided into two parts, and top is divided into quenching apparatus, and lower part is divided into absorption plant.
5. a kind of organosilicon organic exhaust gas containing chlorine according to claim 4, effluent resource environment-friendly disposal system, feature
Be: the packed absorber (13) pumps (14) shape between the spray equipment and lower part diluted acid storage tank of tower top by cyclic absorption
At circulation loop.
6. a kind of organosilicon organic exhaust gas containing chlorine according to claim 1, effluent resource environment-friendly disposal system, feature
Be: there are three entrance and two outlets, three entrances supplement industry water, NaOH respectively and from alkali the alkali liquid tank (16)
The depickling waste water of packed tower (15) is washed, one outlet passes through depickling circulating pump (17) respectively and pumps lye to alkali cleaning packed tower
(15), another is connected to cesspool (38)；The alkali liquid tank (16) of the alkali cleaning packed tower (15) and lower section is recycled by depickling
It pumps (17) and forms closed circuit；Middle temperature catalyst built in the SCR denitration device (25).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654515A (en) * | 2019-01-28 | 2019-04-19 | 大连科林能源工程技术开发有限公司 | A kind of organosilicon organic exhaust gas containing chlorine, effluent resource environment-friendly disposal system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654515A (en) * | 2019-01-28 | 2019-04-19 | 大连科林能源工程技术开发有限公司 | A kind of organosilicon organic exhaust gas containing chlorine, effluent resource environment-friendly disposal system |
| CN109654515B (en) * | 2019-01-28 | 2023-12-29 | 大连科林能源工程技术开发有限公司 | Organic silicon chlorine-containing organic waste gas and waste liquid recycling environment-friendly treatment system |
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