CN106823717A - A kind of coke oven flue gas comprehensive treatment system - Google Patents
A kind of coke oven flue gas comprehensive treatment system Download PDFInfo
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- CN106823717A CN106823717A CN201710058486.8A CN201710058486A CN106823717A CN 106823717 A CN106823717 A CN 106823717A CN 201710058486 A CN201710058486 A CN 201710058486A CN 106823717 A CN106823717 A CN 106823717A
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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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/73—After-treatment of removed components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The present invention relates to flue gases of cock oven processing technology field, and in particular to a kind of coke oven flue gas comprehensive treatment system.A kind of coke oven flue gas comprehensive treatment system, including waste heat steam boiler, blower fan system, system for desulfuration and denitration, accessory substance processing system and power-supply system.Its advantage is：Flue gases of cock oven after the coke oven flue gas comprehensive treatment system treatment that the present invention is provided can reach《Coking chemistry emission of industrial pollutants standard》30 milligrams/standard cubic meter of sulfur dioxide (SO2) emissions in the discharge standard of table six, i.e. coke oven flue gas, 150 milligrams/standard cubic meter of discharged nitrous oxides, granular material discharged 15 milligrams/standard cubic meter；Output is available for the steam and nitre sulphur ammonium complex salt of industrial application simultaneously, nitre sulphur ammonium complex salt can sell for high-nitrogen compound fertilizer, so that the output gained of the system is more than equipment operating cost, while being produced without any ' three wastes ', good economic benefit and social benefit is created.
Description
Technical field
The present invention relates to flue gases of cock oven processing technology field, and in particular to a kind of coke oven flue gas comprehensive treatment system.
Background technology
In recent years, the increasingly serious PM2.5/PM10 pollutions of China's atmosphere pollution, haze weather have turned into Jiao that everybody pays close attention to
Point.Newly《Environmental law》Execution, " per diem punishment, no ceiling ", law enforcement for environmental protection dynamics will be increased unprecedentedly！Environmental is protected
Requirement further improve.Used as disposal of pollutants rich and influential family, the environmental problem of coking industry receives much concern always.According to country《Refining
Coking emission of industrial pollutants standard》The management requirement implemented step by step, from 1 day January in 2015, coking industry started to perform
New Pollutant emission concentration limit value requirement.After by 2 year transitional period, existing coal chemical enterprise was from 1 day January in 2017
Start to perform tightened up pollutant emission limit requirement, i.e., 30 milligrams/standard cubic meter of sulfur dioxide (SO2) emissions in coke oven flue gas,
150 milligrams/standard cubic meter of discharged nitrous oxides, granular material discharged 15 milligrams/standard cubic meter.
Current coking industry is also applied in produce reality without a kind of economic, reliable desulfurizing and denitrifying process, exploitation one
Kind is very necessary for the device that the desulphurization denitration and recuperation of heat and by-product recovery of coke oven flue waste gas are utilized.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of coke oven flue gas comprehensive treatment system, and coke oven tail gas are passing through
GB16171-2012 can be reached after the coke oven flue gas comprehensive treatment system《Coking chemistry emission of industrial pollutants standard》Table
Six discharge standard, while the output gained of whole system is more than equipment operating cost, and produces without any ' three wastes ', creates
Good economic benefit and social benefit.
The technical solution adopted in the present invention is as follows：
A kind of coke oven flue gas comprehensive treatment system, including power-supply system, dioxygen water storage tank, tank used for storing ammonia, technique water storage tank,
Waste heat steam boiler, blower fan system and system for desulfuration and denitration；The system for desulfuration and denitration by one-level Benitration reactor, desulfurizing tower and
Two grades of Benitration reactor compositions；The waste heat steam boiler, the blower fan system, the one-level Benitration reactor, the desulfurization
Tower and two grades of Benitration reactors are sequentially connected；
The one-level Benitration reactor is connected with the dioxygen water storage tank and inside is provided with vortex reactor, and the one-level takes off
Nitre reactor is connected by runner with the desulfurization tower bottom, and the runner is that inverted U runner and flow channel cross-section are gradually reduced；
The top side of the desulfurizing tower connects the dioxygen water storage tank and the tank used for storing ammonia respectively；In the desulfurizing tower
Filler cushion and mesh mist eliminator are provided with from the bottom to top；The bottom and top of the desulfurizing tower are connected by circulating pump；
Two grades of Benitration reactors are located at desulfurizing tower top, and tube bank dedusting is provided with two grades of Benitration reactors
Demister and alkali lye nozzle, the alkali lye nozzle are connected with the technique water storage tank, and the technique water storage tank stores coking
The deposed ammonia that system is produced.
On the basis of above-mentioned technical proposal, the present invention can also make following improvement：
Optionally, described filler cushion has two-layer and is arranged at intervals in the desulfurizing tower, described filler cushion
Including filler and support plate, described filler by huddle or whole block in the way of be placed on the support plate.In the desulfurizing tower also
Vortex gas distributor is provided with, the vortex gas distributor is located at described filler cushion lower section.
Optionally, water conservancy diversion ring flat-plate and flusher are provided with the tube bank dedusting demister, are additionally provided with from top to bottom
First vortex leaf fan, second eddy current leaf fan and the 3rd vortex leaf fan, the water conservancy diversion ring flat-plate are located at second eddy current leaf fan and the 3rd whirlpool
Between stream leaf fan；The tube bank dedusting demister side is provided with exhanst gas outlet, and the smoke outlet is provided with water fender.
Optionally, the one-level Benitration reactor bottom connects the circulating pump by desulfurization measuring pump；The desulfurizing tower
Bottom of towe is connected to the diluted acid storage tank of by-product recovery by jet flow branch pipe.
Optionally, also including accessory substance processing system, the accessory substance processing system includes the sulphur ammonia reaction being sequentially connected
Device, vapo(u)rization system and for separation of solid and liquid, the separator of dehydration；The sulphur ammonia reactor respectively with the diluted acid storage tank and institute
Tank used for storing ammonia connection is stated, vapo(u)rization system is connected with the steam (vapor) outlet of the waste heat steam boiler and is used to heat by steam.
Wherein, the vapo(u)rization system includes steam heater, evaporates separation chamber, condenser and evaporative recirculation pump；The steaming
Hair separation chamber connects the sulphur ammonia reactor and the condenser respectively, and the evaporative recirculation pump connects the evaporation and separates respectively
Room and the steam heater.Wherein, the separator includes the cyclone feed pump being sequentially connected, cyclone and centrifugation
Machine, the cyclone feed pump is connected with the evaporating separation device.
Optionally, also including the standby power system and standby fan that possess full-automatic startup function, the stand-by power supply
System is connected with the whole coke oven flue gas comprehensive treatment system, and the standby fan is provided with stand-by power supply.
Optionally, also DCS control systems including the coke oven flue gas comprehensive treatment system is monitored and operated.
Compared with prior art, the advantages of the present invention are：
(1) system for desulfuration and denitration of the invention is made up of one-level Benitration reactor, desulfurizing tower and two grades of Benitration reactors, whole
Individual system for desulfuration and denitration causes that coke oven tail gas can reach after passing through by rational annexation and internal special structure design
To GB16171-2012《Coking chemistry emission of industrial pollutants standard》Sulfur dioxide in the discharge standard of table six, i.e. coke oven flue gas
30 milligrams/standard cubic meter of discharge, 150 milligrams/standard cubic meter of discharged nitrous oxides, granular material discharged 15 milligrams/standard is stood
Square rice.
(2) it is of the invention entirely to make an investment in 20 yuan/ton of burnt left and right, due to fully utilizing the heat energy of waste heat steam boiler and taking off
The accessory substance output of sulphur denitrating system is available for the steam and nitre sulphur ammonium complex salt of industrial application, and nitre sulphur ammonium complex salt is compound for nitrogen high
Fertilizer can be sold so that the output gained of the system is more than equipment operating cost, while whole process is produced without any ' three wastes ',
Create good economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is the structural representation of the coke oven flue gas comprehensive treatment system；
Fig. 2 is the structural representation of the tube bank dedusting demister；
1- waste heat steam boilers, 2- blower fan systems, 3- power-supply systems, 4- one-level Benitration reactors, 41- runners, 5- desulfurization
Tower, 51- filler cushions, 52- mesh mist eliminators, 54- desulfurization measuring pumps, 55- circulating pumps, bis- grades of Benitration reactors of 6-, 61- alkali
Nozzle for liquid, 62- tube bank dedusting demisters, the vortex leaf fans of 621- first, 622- second eddy currents leaf fan, the vortex leaves of 623- the 3rd
Fan, 624- flushers, 625- water conservancy diversion ring flat-plates, 7- jet flow branch pipes, 8- tank used for storing ammonia, 9- dioxygen water storage tanks, 10- diluted acid storage tanks,
11- sulphur ammonia reactors, 12- steam heaters, 13- evaporations separation chamber, 14- evaporative recirculation pumps, 15- condensers, 16- cyclones are given
Material pump, 17- cyclones, 18- centrifuges, 19- vavuum pumps, 20- hot water storgaes, 21- heat-exchanger pumps, 22- standby power systems, 23- works
Skill water storage tank.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.According to claims and following
Explanation, advantages and features of the invention will become apparent from.It should be noted that, accompanying drawing is used in the form of simplifying very much and
Non- accurately ratio, is only used to conveniently, lucidly aid in illustrating the purpose of the embodiment of the present invention.
Embodiment
A kind of coke oven flue gas comprehensive treatment system, as shown in Figure 1-2, including the storage of power-supply system 3, dioxygen water storage tank 9, ammoniacal liquor
Tank 8, technique water storage tank 23, waste heat steam boiler 1, blower fan system 2 and system for desulfuration and denitration；The system for desulfuration and denitration is by one-level
Benitration reactor 4, desulfurizing tower 5 and two grades of Benitration reactors 6 are constituted；It is the waste heat steam boiler 1, the blower fan system 2, described
One-level Benitration reactor 4, the desulfurizing tower 5 and two grades of Benitration reactors 6 are sequentially connected.
In waste heat steam boiler 1, flue gases of cock oven carries out heat transfer reduction temperature by waste heat steam boiler 1 and water,
The flue gases of cock oven after cooling meets the requirement of follow-up system for desulfuration and denitration inlet flue gas temperature.
Wherein, the blower fan system 2 uses booster fan VFC to ensure that the blast for producing can meet the coke oven
Tiny structure is kept to ensure safety in production in the case of smoke comprehensive governing system.The technique water storage tank 23 stores coking system
The deposed ammonia of generation, dioxygen water storage tank 99 stores the hydrogen peroxide of 27.5wt%.
In a preferred scheme, the one-level Benitration reactor 4 is connected with the dioxygen water storage tank 9 and inside is provided with vortex
Reactor (not shown), the one-level Benitration reactor 4 is connected by runner 41 with the bottom of the desulfurizing tower 5, the runner 41
It is that inverted U runner 41 and the cross section of runner 41 are gradually reduced.
In one-level Benitration reactor 4, the flue gases of cock oven for passing through is divided into tens strands by the vortex reactor
The air-flow of high speed rotational flow simultaneously sends into the runner 41 with hydrogen peroxide reaction, and these air-flows rapidly smash solution dispersion, and
It is sufficiently mixed, forms strength pneumatic stirring, gas-liquid two-phase forms froth bed, the specific surface area of gas-liquid two-phase is expanded into maximum.
Gas-liquid two-phase carries out very thorough and quick mass transfer in froth bed, and hydrogen peroxide is catalyzed the hydroxy radical OH and flue gas to be formed
Middle NOx is fully reacted.So that most oxynitrides is sloughed and from the runner 41 in the flue gases of cock oven
Into the desulfurizing tower 5, while one-level denitration accessory substance of the generation containing nitric acid and hydrogen peroxide falls back to the one-level with deadweight taking off
The bottom of nitre reactor 4.Because the runner 41 is that U-shaped runner 41 and the sectional area of runner 41 are gradually reduced, due to the runner 41
Limitation, the flue gases of cock oven from original perpendicular flow is changed into horizontal rotation flowing, simultaneously because the runner 41
The sectional area of runner 41 is gradually reduced, the coke oven flue gas velocity increase, so as to promote the flue gases of cock oven with the dioxygen
The reaction of water.
In a preferred scheme, the top side connection of the desulfurizing tower 5 connects the dioxygen water storage tank 9 and ammoniacal liquor respectively
Storage tank 8；So that the flue gases of cock oven is moved from below to up, the hydrogen peroxide is moved from top to down.Because hydrogen peroxide is in alkalescence
It is easier to obtain hydroxyl radical free radical in environment, the sufficiently catalytic hydrogen peroxide of ammoniacal liquor that tank used for storing ammonia 8 is provided obtains more hydroxyls certainly
By base.Filler cushion 51 and mesh mist eliminator 52 are provided with from the bottom to top in the desulfurizing tower 5；The bottom of the desulfurizing tower 5 and
Top is connected by circulating pump 55；So that desulphurization reaction is circulated, fully reaction.
Wherein, described filler cushion 51 has two-layer and is arranged at intervals in the desulfurizing tower 5, described filler cushion
51 include filler and support plate, described filler by huddle or whole block in the way of be placed on the support plate.In the desulfurizing tower 5
Vortex gas distributor (not shown) is additionally provided with, the vortex gas distributor is located at the lower section of described filler cushion 51.
Described filler cushion 51 is used to slow down the movement velocity of the flue gases of cock oven and the hydrogen peroxide and as gas
The mass transfer apparatus of contact member between liquid two-phase so that the flue gases of cock oven on described filler surface with the dioxygen that meets
The abundant reaction of water, so that major part SO in the flue gases of cock oven2Two grades of Benitration reactors 6 are divested and enter, while raw
Into sulfur acid and the desulfurizing byproduct of hydrogen peroxide fall back to the bottom of the desulfurizing tower 5 with deadweight.Mesh mist eliminator 52 is used for cutting
Stay fine droplet in the flue gases of cock oven.
Vortex gas distributor in the desulfurizing tower 5 realizes that the flue gases of cock oven is uniform in the desulfurizing tower 5
Distribution.Described filler cushion 51 has two-layer and can be come into operation when discharge index is improved, it is ensured that desulfuration efficiency can meet most
New nation's standard and in the future tightened up discharge standard.
In a preferred scheme, it is easier in alkaline environment to obtain hydroxy radical, sufficiently catalytic dioxygen due to hydrogen peroxide
Water obtains more hydroxy radicals, sets up alkali lye nozzle 61 in two grades of Benitration reactors 6, alkali lye nozzle 61 with store Jiao
The technique water storage tank 23 of the deposed ammonia that change system is produced is connected.
Tube bank dedusting demister 62 is provided with two grades of Benitration reactors 6 and positioned at the top of the desulfurizing tower 5.Beam is removed
Dirt demister by out of stock reaction after the flue gases of cock oven in micro dust and during acid mist retains and makes the acid mist
Hydrogen peroxide participate in denitration reaction again.Wherein, it is provided with water conservancy diversion ring flat-plate 625 and rinses in the tube bank dedusting demister 62 and fills
624 are put, the first vortex leaf fan 621, second eddy current leaf fan 622 and the 3rd vortex leaf fan 623 from top to bottom is additionally provided with, it is described to lead
Stream ring flat-plate 625 is located between the vortex leaf fan 623 of second eddy current leaf fan 622 and the 3rd；The side of tube bank dedusting demister 62
Exhanst gas outlet (not shown) is provided with, the smoke outlet is provided with water fender (not shown).
Rotate flue gas and rise due to the guide effect of vortex leaf fan, in the presence of the centrifugal force of vortex leaf fan, mist
Drop, to vessel wall motion, is mutually collided in motion process generation and is condensed into larger drop with dust, and drop is thrown toward cylinder
Inner wall surface, contacts latter with two grades of Benitration reactors 6 are fallen into the drop layer that wall adheres to, and realizes dedusting and demisting.It is described
Vortex leaf fan has three layers, strengthens dedusting and removes fog effect.Water conservancy diversion ring flat-plate 625 is used for improving the motion speed of the flue gases of cock oven
Degree, strengthens dedusting and removes fog effect.Exhanst gas outlet is used for the flue gases of cock oven processed by desulphurization denitration and dedusting demisting
Discharge.Water fender is used for preventing droplet from escaping.
In whole system for desulfuration and denitration, the bottom of one-level Benitration reactor 4 connects described by desulfurization measuring pump 54
Circulating pump 55；So that the hydrogen peroxide in the one-level denitration accessory substance and the desulfurizing byproduct passes through the circulating pump 55
The desulphurization reaction of the desulfurizing tower 5 is participated in, hydrogen peroxide can be recycled, it is cost-effective.Two grades of Benitration reactors 6 connect
The top with the desulfurizing tower 5 is connect, two grades of denitration accessory substances of denitration reaction are carried out with deadweight in two grades of Benitration reactors 6
The bottom of towe of the desulfurizing tower 5 is fallen back to, and is mixed to form including sulfuric acid with the one-level denitration accessory substance and the desulfurizing byproduct,
Nitric acid, the accessory substance of dioxygen aqueous mixtures, the accessory substance is 30wt% sulfuric acid and nitric acid mixed liquor.The desulfurizing tower 5
Bottom of towe is connected to the diluted acid storage tank 10 of by-product recovery by jet flow branch pipe 7.Jet flow branch pipe 7 is by after bulk devulcanization denitration reaction
By-product recovery in diluted acid storage tank 10.
Wherein denitration mechanism is WT-H2O2Low temperature process denitrating technique, this is that Hubei Wei Tian Environmental Protection Technology Co., Ltd introduces U.S.
A kind of novel denitration technology of independent research on the basis of Guo Huofeng systems international corporation NASAMPCS denitration technologies, the technology is obtained
National utility patent mandate and patent of invention accept, the patent No.：ZL:201520966067.0, the technology with
Hydrogen peroxide is catalyzed hydroxyl of the generation with strong oxidation by the hydrogen peroxide of 27.5wt% as oxidant by alkaline environment
Base free radical OH, hydroxyl radical free radical OH are a kind of important active oxygens, are to lose one by hydroxyl OH- from molecular formula
It is individual to electronically form.Hydroxyl radical free radical has extremely strong electronic capability i.e. oxidability, oxidizing potential 2.8V.It is nature
In be only second to the oxidant of fluorine.Hydroxy radical OH mixes in flue gas in Benitration reactor with by the flue gas of the supercharging that is vortexed
Nitrogen oxides (predominantly NO and NO2Deng) oxid-reclamatiom is carried out, final mixture reclaims denitration accessory substance nitre through gas-liquid separation
Acid and nitrous acid solution, the flue gas qualified discharge after denitration, the denitrating technique have not by flue-gas temperature limited and denitration efficiency compared with
High the features such as.
Specifically chemical equation is：
H2O2→2·OH
H2O2+·OH→HO2·+H2O
NO+HO2·→NO2+·OH
NO2+·OH→HNO3
NO+·OH→HNO2
NO+H2O2→NO2+H2O
H2O2+2NO2→2HNO3。
Desulphurization mechanism is WT-H2O2Doctor treatment, this is that removing flue gas is washed in desulfurizing tower 5 using 27.5wt% hydrogen peroxide
Middle SO2To reach the purpose of flue gas desulfurization.Hydrogen peroxide generates sulfuric acid in an acidic solution by oxidizing sulfur dioxide.Sulfuric acid can
With miscible with arbitrary proportion with water, supersaturated crystallization is not resulted in, cause fouling and clogging problem, therefore, it is de- using peroxide passivation
Sulphur technique improves the reliability of system, reduces investment and operating cost.Dilute sulfuric acid can be as ammonium sulfate workshop section raw material simultaneously
Use, secondary pollution problem will not be produced.
Specifically chemical equation is：
SO2+H2O→H2SO3
H2O2+H2SO3→H2SO4+H2O
2H2O2→2H2O+O2↑
In a preferred scheme, also including accessory substance processing system, the accessory substance processing system include respectively with it is described
Diluted acid storage tank 10 and the sulphur ammonia reactor 11 of the connection of the tank used for storing ammonia 8, the steam (vapor) outlet with the waste heat steam boiler 1 are connected
Vapo(u)rization system and for separation of solid and liquid, the separator of dehydration, the vapo(u)rization system is used to be heated by steam.
Wherein, the vapo(u)rization system includes steam heater 12, the evaporation separation chamber being connected with the sulphur ammonia reactor 11
13, condenser 15 and evaporative recirculation pump 14；The condenser 15 is connected with the evaporation separation chamber 13.The evaporative recirculation pump 14
The evaporation separation chamber 13 and the steam heater 12 are connected respectively.
Wherein, the separator includes the cyclone feed pump 16 being sequentially connected, and carries out the cyclone 17 of separation of solid and liquid
With the centrifuge 18 being dehydrated, the cyclone feed pump 16 is connected with the evaporating separation device and is combined the nitre sulphur ammonium
Salting liquid delivers to cyclone 17 and centrifuge 18 successively.
In accessory substance processing system, the diluted acid storage tank 10 is connected with the sulphur ammonia reactor 11 so that the by-product
Thing carries out neutralization reaction generation nitre sulphur ammonium composite compaction technique into the sulphur ammonia reactor 11 and ammoniacal liquor, and the nitre sulphur ammonium is answered
Conjunction salting liquid is delivered to and provided by afterheat utilizing system with the vapo(u)rization system, wherein steam, and steam enters heater as thermal source,
The nitre sulphur ammonium composite compaction technique is carried out to heat the nitre sulphur ammonium composite compaction technique for being concentrated to give that solid content is 10wt~15wt%,
And produce condensed water.Condensed water is into hot water storgae 20 and as in supplement Water Sproading to system for desulfuration and denitration.Whole evaporation system
It is tiny structure to unite, and evaporation efficiency is high.Evaporative recirculation pump 14 so that the nitre sulphur ammonium composite compaction technique is in the evaporating separation device
Repeatedly circulated and the steam heater 12 between so that heating concentrated effect is more preferable.The cyclone feed pump 16 will be heated
The nitre sulphur ammonium composite compaction technique after concentration delivers to the cyclone 17 carries out separation of solid and liquid, and its solid content increases to 40wt%
~50wt% or so, subsequently into the centrifuge 18 be dehydrated obtain the aqueous grains nitre sulphur ammonium in 5wt% or so answer
Close salt.Sulfuric acid, nitric acid generate nitre sulphur ammonium complex salt with ammonia reaction respectively.
Ammonium sulphate nitrate, as sulfur-bearing and the full water-soluble high-nitrogen compound fertilizer of nitrate nitrogen, is one of primary raw material of Water soluble fertilizer,
Also can directly apply, there is larger market development space, while producing the problem of outlet that nitre sulphur ammonium also solves nitric acid and ammonia, be
One very promising product.In this state, ammonium nitrate loses explosivity, and ammonium sulphate nitrate is safe.
Specific chemical equation in accessory substance processing system is：
H2SO4+HNO3+3NH3=(NH4)2SO4·NH4NO3
The condenser 15 respectively with recirculated water, vavuum pump 19 is connected with hot water storgae 20, the hot water storgae 20 and heat-exchanger pump
21 are connected and remove extraneous hot water by the heat-exchanger pump 21.
In a preferred scheme, also including the standby power system 22 for possessing full-automatic startup function and standby fan, institute
Standby power system 22 is stated to be connected with the whole coke oven flue gas comprehensive treatment system.The standby power system 22 and whole institute
The connection of coke oven flue gas comprehensive treatment system is stated, the automatic when the power-supply system 3 cannot power is realized, when the power supply system
After system 3 recovers, shut down from line delay.The standby fan prevents from being broken down because the blower fan system 2 runs.
In a preferred scheme, the standby fan includes stand-by power supply.Ensure that standby motor when in use can be normal
Operating.
In a preferred scheme, the also DCS controls including the coke oven flue gas comprehensive treatment system is monitored and operated
System processed.Operations staff can be monitored and be operated by DCS operator station, realize that comprehensive treatment system opens/stops a key and opens
The monitoring of dynamic, normal operation and the treatment of operation exception operating mode.In production control, the reaction of continuous addition accurate measurement is taken
Required hydrogen peroxide, ammoniacal liquor and water, while ensure discharge the accessory substance diluted acid stable content in 30wt%；Can also be online
Monitor SO in the flue gases of cock oven2And the concentration value of oxynitrides, and the addition for controlling hydrogen peroxide is adjusted with the value,
As the Main Basiss of running Optimization.
In a preferred scheme, dioxygen water storage tank 9 is made by FRP materials, and one is set altogether, and design size is：Φ3800×
4000mm volumes are 45m3, meet 10-15 days or so hydrogen peroxide consumption volumes of system.Tank body sets temperature sounder, pressure and becomes
Device is sent to be monitored to the temperature and pressure change of storage tank in real time and be transferred to DCS control systems, is exceeded in temperature and pressure
Start safety system during setting safety value to be simultaneously emitted by acousto-optic electric alarm and start placing device.Hydrogen peroxide storage met
Related request in hydrogen oxide national standard and conventional hazardous chemical storage general rule.
Because hydrogen peroxide has unstability, initial exotherm decomposition temperature is 34.5 DEG C under adiabatic conditions, is being put
Pressure of storage tank can be caused to increase in the case of thermal decomposition acutely, temperature rises, and may be exploded when serious, therefore hydrogen peroxide is stored up
The dedicated storage that tank 9 is arranged on heat-insulated lucifuge is interior, it is to avoid hydrogen peroxide occurs unstable reaction because of solar radiation, and between storage
Interior setting ventilating system is prevented from answering hydrogen peroxide itself decomposition caused heat release ensuring hydrogen peroxide storage environment temperature and produced below 34 DEG C
Raw danger.Pressure release pneumostome is set in dioxygen water storage tank 9 simultaneously to ensure to be able to because hydrogen peroxide itself decomposes the pressure for producing
Release, a pressure release from return mouthful and a charcoal absorption mouthful is set in pressure release pneumostome leading portion, and charcoal absorption mouthful is used for
Prevent the dust of air from containing heavy metal component, pressure release return mouthful is automatically switched off in system worked well, hydrogen peroxide is in consumption
During the liquid level vacuum that produces air is supplemented by charcoal absorption mouthful, the filtering of activated carbon can avoid micro in environment
The danger that heavy metal enters dioxygen water storage tank 9 and hydrogen peroxide generation pyrolytic reaction and produces.
During exothermic decomposition it is have an endothermic process at 75 DEG C -85 DEG C due to hydrogen peroxide, in the temperature range pair
Dioxygen water storage tank 9 forces cooling to be just avoided that the blast produced because hydrogen peroxide is drastically decomposed.Therefore set at the top of dioxygen water storage tank 9
Annular cooler is put, pressure cooling is carried out to storage when DCS monitors startup cooling system when dioxygen water storage tank 9 reaches 75 DEG C.
Cofferdam is set by pipeline and desulfurization island cofferdam UNICOM in the bottom of dioxygen water storage tank 9, to prevent hydrogen peroxide seepage and force to cool down
When to scene pollution.
Fire hydrant and other fire fighting devices are set in hydrogen peroxide memory block and cofferdam is set in memory block.Simultaneously between storage
It is interior that hazardous chemical known card safely is set.
During work, in the presence of blower fan system 2, the flue gases of cock oven carries out heat by waste heat steam boiler 1 and water
Transmission reduces temperature, and the flue gases of cock oven after cooling meets the requirement of follow-up system for desulfuration and denitration inlet flue gas temperature, while producing
Raw steam delivers to evaporation heater 12 and provides thermal source, and the flue gases of cock oven is arrived successively by the booster fan of blower fan system 2
Up to one-level Benitration reactor 4, desulfurizing tower 5, two grades of Benitration reactors 6 reach desulfurization, and denitration, dedusting is discharged after demisting purpose, produced
It is raw to contain sulfuric acid, nitric acid, the accessory substance of dioxygen water mixed liquid delivers to sulphur ammonia reactor 11 by jet flow branch pipe 7 to be carried out with ammoniacal liquor
Neutralization reaction generates nitre sulphur ammonium complex salt, and nitre sulphur ammonium complex salt is delivered to evaporation heater 12 it is heated by steam, sent successively
Nitre sulphur ammonium complex salt is set to be separated with steam to evaporation separation chamber 13, the cyclone feed pump 16 being connected with evaporation separation chamber 13
The nitre sulphur ammonium composite compaction technique heated after concentration is delivered to the cyclone 17 and carries out separation of solid and liquid, subsequently into it is described from
Scheming 18 be dehydrated and obtains the aqueous grains nitre sulphur ammonium complex salt in 5wt% or so.
Obviously, those skilled in the art can carry out various changes and modification without deviating from spirit of the invention to invention
And scope.So, if these modifications of the invention and modification belong to the claims in the present invention and its equivalent technologies scope it
Interior, then the present invention is also intended to including including these changes and modification.
Claims (10)
1. a kind of coke oven flue gas comprehensive treatment system, it is characterised in that：Including power-supply system, dioxygen water storage tank, tank used for storing ammonia, work
Skill water storage tank, waste heat steam boiler, blower fan system and system for desulfuration and denitration；The system for desulfuration and denitration is by one-level denitration reaction
Device, desulfurizing tower and two grades of Benitration reactor compositions；The waste heat steam boiler, the blower fan system, the one-level denitration reaction
Device, the desulfurizing tower and two grades of Benitration reactors are sequentially connected；
The one-level Benitration reactor is connected with the dioxygen water storage tank and inside is provided with vortex reactor, and the one-level denitration is anti-
Device is answered to be connected with the desulfurization tower bottom by runner, the runner is that inverted U runner and flow channel cross-section are gradually reduced；
The top side of the desulfurizing tower connects the dioxygen water storage tank and the tank used for storing ammonia respectively, and the desulfurizing tower is interior under
Supreme to be provided with filler cushion and mesh mist eliminator, the bottom and top of the desulfurizing tower are connected by circulating pump；
Two grades of Benitration reactors are located at desulfurizing tower top, and tube bank dedusting demisting is provided with two grades of Benitration reactors
Device and alkali lye nozzle, the alkali lye nozzle are connected with the technique water storage tank, and the technique water storage tank stores coking system
The deposed ammonia of generation.
2. coke oven flue gas comprehensive treatment system according to claim 1, it is characterised in that：Described filler cushion has two-layer
And be arranged at intervals in the desulfurizing tower, described filler cushion includes filler and support plate, and described filler is huddling or whole block
Mode be placed on the support plate.
3. coke oven flue gas comprehensive treatment system according to claim 1 or claim 2, it is characterised in that：It is additionally provided with the desulfurizing tower
Vortex gas distributor, the vortex gas distributor is located at described filler cushion lower section.
4. coke oven flue gas comprehensive treatment system according to claim 3, it is characterised in that：In the tube bank dedusting demister
Water conservancy diversion ring flat-plate and flusher are provided with, the first vortex leaf being additionally provided with from top to bottom is fanned, second eddy current leaf fan and the 3rd is vortexed leaf
Fan, the water conservancy diversion ring flat-plate is located at second eddy current leaf and fans and the 3rd vortex leaf fan between；The tube bank dedusting demister side sets
There is exhanst gas outlet, the smoke outlet is provided with water fender.
5. the coke oven flue gas comprehensive treatment system according to claim 1 or 4, it is characterised in that：The one-level Benitration reactor
Bottom connects the circulating pump by desulfurization measuring pump；The desulfurizing tower bottom of towe is connected to by-product recovery by jet flow branch pipe
Diluted acid storage tank.
6. coke oven flue gas comprehensive treatment system according to claim 5, it is characterised in that：Also include accessory substance processing system,
The accessory substance processing system includes the sulphur ammonia reactor that is sequentially connected, vapo(u)rization system and for separation of solid and liquid, the separation of dehydration
Device；The sulphur ammonia reactor is connected with the diluted acid storage tank and the tank used for storing ammonia respectively, and vapo(u)rization system is steamed with the waste heat
The steam (vapor) outlet of boiler furnace is connected and is used to heat by steam.
7. coke oven flue gas comprehensive treatment system according to claim 6, it is characterised in that：The vapo(u)rization system adds including steam
Hot device, evaporates separation chamber, condenser and evaporative recirculation pump；The evaporation separation chamber connects the sulphur ammonia reactor and described respectively
Condenser, the evaporative recirculation pump connects the evaporation separation chamber and the steam heater respectively.
8. coke oven flue gas comprehensive treatment system according to claim 7, it is characterised in that：The separator includes connecting successively
The cyclone feed pump for connecing, cyclone and centrifuge, the cyclone feed pump are connected with the evaporating separation device.
9. coke oven flue gas comprehensive treatment system according to claim 1, it is characterised in that：Also include possessing full-automatic startup work(
The standby power system and standby fan of energy, the standby power system and the whole coke oven flue gas comprehensive treatment system connect
Connect, the standby fan is provided with stand-by power supply.
10. coke oven flue gas comprehensive treatment system according to claim 1, it is characterised in that：Also include to the coke oven flue gas
The DCS control systems that comprehensive treatment system is monitored and operated.
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