CN208177248U - It is a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration - Google Patents
It is a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration Download PDFInfo
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- CN208177248U CN208177248U CN201820473812.1U CN201820473812U CN208177248U CN 208177248 U CN208177248 U CN 208177248U CN 201820473812 U CN201820473812 U CN 201820473812U CN 208177248 U CN208177248 U CN 208177248U
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Abstract
The utility model discloses a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration and method, flue gas desulfurization and denitrification system includes active carbon/coke column for smoke purification and regenerator, chimney, ammonia water spray system and absorption tower, active carbon/coke conveyer is equipped between purifying column and regenerator, high-temperature heating system and regeneration feed channel are connected on regenerator, ammonia water spray system includes ammonium hydroxide reservoir, the first ammonia water pipeline and the second ammonia water pipeline being arranged in parallel are connected on ammonium hydroxide reservoir, first ammonia water pipeline and the second ammonia water pipeline are each led into smoke inlet pipe road and absorption tower, absorb the bottom of the tower is connected with ammonium sulfate solution pipeline, top is connected with exhausting waste gas pipeline, regeneration feed channel is passed into absorption tower, it includes the active carbon/coke that will purify tower bottom that purified gas exhaust pipe and exhausting waste gas pipeline, which are passed through chimney, The old material conveyer being delivered at the top of regenerator and the virgin material conveyer being delivered to the active carbon/coke for regenerating tower bottom at the top of purifying column.
Description
Technical field
The utility model relates to a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration, mainly utilize activity
Charcoal/coke purifies coke oven chimney exhaust gas, belongs to atmospheric pollution control engineering technical field.
Background technique
In recent years, China's atmosphere pollution is got worse, and haze weather is high-incidence, and flue gas desulfurization, denitration have become industry etc.
The important and more urgent task in one, field.The people are had become with haze, acid rain etc. for the atmosphere polluting problem of representative
The object that the masses pay close attention to.With the raising of environmental standard, the industries such as steel, non-ferrous metallurgy, coal fired power generation, coking
Development is faced with heavy pressure.By 11th Five-Year, 12 keypoint treatment, atmosphere pollution situation, which has, significantly to be changed in China
It is kind, but since our the economic scale of constructions are big, extensive production enterprise is numerous, the solution of air contaminant treatment problem still accepting a heavy burden road
Far.
Industrial smoke pollutant emission becomes an important factor for China's environmental pollution.Coking, steel, chemical industry, cement, electric power
Etc. the flue gas that is emitted of industries not only temperature is high, but also contain the venomous injurants such as a large amount of dust, coal gas, sulfur dioxide
Matter.It after pellet is sucked by people, can accumulate in respiratory system, cause many diseases, coarseparticulate can be encroached on and be exhaled
Desorption system induces asthma；Sulfur dioxide will be such that the acid ingredient in precipitation increases and form acid rain, make Lake Acidification, make
At fish death, acid rain can also contain Forest Growth, even result in forest death；Gas concentration raising is easily exploded；Benzene etc.
The discharge of high carcinogen will seriously endanger human health.And different industries flue gas type is different, ingredient is different, and concentration has difference
Different, flue-gas temperature is also not quite similar, so that problem has great complexity.
Coke is raw materials for production important in steel production, and coke oven is different using fuel, the NO in flue gasxConcentration level is not
One, generally in 300~1800mg/m3；SO2Concentration is generally in 100~300mg/m3.Chinese Ministry of Environmental Protection issued on June 27th, 2012
The NO required in " coking chemistry emission of industrial pollutants standard "x≤500mg/m3(Special section≤150mg/m3), most enterprises
Discharge and require gap larger.There are following characteristics for coke oven chimney exhaust gas: first is that flue-gas temperature is lower, coke-stove gas temperature of burning
It general 200 DEG C~250 DEG C, burns general 180 DEG C~200 DEG C of blast furnace gas temperature, it is anti-lower than needed for common SCR denitration
Answer 300 DEG C~400 DEG C of temperature；Second is that the flue gas pollutant complicated component of coke oven discharge, contains carbon monoxide, carbon dioxide, sulphur
Change hydrogen, hydrogen cyanide, nitrogen oxides, sulfur dioxide, residual ammonia, phenol and coal dust, tar etc.；Third is that NOxContent difference is big, concentration one
As be 600mg/Nm3~1500mg/Nm3, some even as high as 1800mg/Nm3, coke oven flue gas denitration requirement is than power plant, sintering etc.
Industry requirement is much higher.
The sulfur method that coking industry is most widely used at present is wet-type ammonia technology and rotating spraying semi-dry process,
However there are by-product resources to utilize difficulty, is also easy to produce secondary pollution problems；Denitration generally uses selective catalytic reduction
(SCR) technology, but it is applied to coking industry, there is a problem of that energy consumption is excessively high.As atmosphere pollution control type is got in China
It is increasingly stringenter come more, discharge standard, the process flow of smoke gas treatment is becoming complicated and tediously long, and desulphurization and denitration removes
The processing equipment that a series of measures such as dirt, de- dioxin need is more and more, and occupied area is increasing, investment and operating cost
It is higher and higher, also result in maintenance difficulty, by-product secondary pollution problems.For the current industrial smoke pollution control skill in China
The status of art, there is an urgent need to develop the integrated technologies and by-product resource technology that adapt to China's national situation and industry development demand.
The built active carbon desulfurization denitration dress of country's coal-burning boiler, nonferrous smelting, sulfuric acid tail gas, steel sintering industry at present
In setting, domestic technology has that twin-stage is cross-flow moving bed, single-stage cross-flow multicell moving bed.The active carbon desulfurization denitration technology that domesticizes is de-
Sulphur efficiency is up to 95% or more；The cross-flow moving bed technology denitration efficiency of twin-stage is up to 60%~70%；Single-stage cross-flow multicell moves
Dynamic bed technique denitration efficiency only has 40%, using series connection up to 70%.In view of coke oven flue gas own characteristic, active carbon desulfurization denitration
Twin-stage is cross-flow moving bed in technology and single-stage cross-flow multicell moving bed can not meet the high denitration requirement of coke oven flue gas well.With
Coke oven flue gas environmental protection policy increasingly tighten, develop be suitble to coking industry economic, efficient active carbon flue gas desulfurizing denitration skill
Art is more urgent.
Summary of the invention
The purpose of this utility model is to provide a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration, with solution
The technical problem that certainly prior art active carbon denitration efficiency is not high, desulfurizing byproduct processing is difficult, it is more to reach coke oven chimney exhaust gas
The purpose of pollutant comprehensive treatment and by-product resource comprehensive utilization and the discharge of coke oven chimney exhaust gas stably reaching standard.
The utility model adopts the following technical scheme that one kind based on active carbon/coke coke oven flue gas system for desulfuration and denitration
Based on active carbon/coke coke oven flue gas system for desulfuration and denitration, including active carbon/coke column for smoke purification and active carbon/coke regenerator,
It is connected with smoke inlet pipe road and purified gas exhaust pipe on purifying column, it is defeated that active carbon/coke is equipped between purifying column and regenerator
Device is sent, high-temperature heating system and regeneration feed channel are connected on the regenerator, the system for desulfuration and denitration further includes chimney, ammonia
Water injection system and absorption tower, the ammonia water spray system include ammonium hydroxide reservoir, are connected with and are arranged in parallel on ammonium hydroxide reservoir
The first ammonia water pipeline and the second ammonia water pipeline, the first ammonia water pipeline and the second ammonia water pipeline each lead into smoke inlet pipe road
In absorption tower, the absorb the bottom of the tower is connected with ammonium sulfate solution pipeline, top is connected with exhausting waste gas pipeline, the regeneration gas
Pipeline is passed into absorption tower, and the purified gas exhaust pipe and exhausting waste gas pipeline are passed through chimney, and the active carbon/coke is defeated
Sending device includes that the active carbon/coke for purifying tower bottom is delivered to the old material conveyer at the top of regenerator and will regenerate the work of tower bottom
Property charcoal/coke is delivered to the virgin material conveyer at the top of purifying column.
The old material conveyer and virgin material conveyer are Z-type bucket chain conveyor, and Z-type bucket chain conveyor includes one vertical
Lifting parts and two horizontal feed portions for being separately positioned on vertical-lifting portion both ends.
The regenerator is externally provided with virgin material storage bin, and storage bin top is connect with regenerator, and lower part is passed into virgin material conveying
In the horizontal feed portion of the lower part of device.
The high-temperature heating system includes hot-blast stove/electric heater and high-temperature heat exchange tube road, and hot-blast stove/electric heater is used for
Connect with outside air and blast furnace gas pipeline, high-temperature heat exchange tube road include be connected to hot-blast stove/electric heater and regenerator it
Between hot wind admission line and hot wind exhaust pipe, the hot wind exhaust pipe be equipped with heat exchange booster fan.
The end that first ammonia water pipeline is connect with smoke inlet pipe road is equipped with more than two spray ammonia mouths, each to spray ammonia mouth
It is passed through in smoke inlet pipe road, first ammonia water pipeline is equipped with ammonia water spray controller.
The smoke inlet pipe road is equipped with flue gas-air heat exchanger, is connected with air wind on flue gas-air heat exchanger
Machine is equipped with flue gas-flue gas heat-exchange unit or waste heat boiler, flue gas-cigarette between the smoke inlet pipe road and purified gas exhaust pipe
Gas heat exchanger or waste heat boiler are before the position on smoke inlet pipe road is located at flue gas-air heat exchanger.
Chimney, purified gas exhaust pipe and exhaust gas row are passed through after the purified gas exhaust pipe and exhausting waste gas pipeline are in parallel
Pipeline after feed channel is in parallel is equipped with booster fan.
Overhead feed bin is equipped at the top of the purifying column.
The purifying column and regeneration tower bottom are equipped with discharge cone bucket, and the discharge cone bucket for purifying tower bottom is two or more,
Long axis discharger is equipped in each discharge cone bucket, long axis discharger bottom is equipped with double spool discharger, the discharge cone of regenerator
Fiaring cone is equipped in bucket.
The utility model has the beneficial effects that former flue gas is introduced into smoke inlet pipe road when Tthe utility model system is run,
Former flue gas enters suitable position before purifying column, sprays into ammonium hydroxide into smoke inlet pipe road by the first ammonia water pipeline, utilizes height
Ammonium hydroxide is gasificated into ammonia by warm flue gas, and flue gas enters flue gas-flue gas heat-exchange unit or waste heat boiler drop together with the ammonia after gasification
Temperature is cooled to 110 DEG C -140 DEG C to 160 DEG C -200 DEG C, using flue gas-air heat exchanger, and the flue gas after cooling is together with ammonia
Purifying column is entered by smoke inlet pipe road, in purifying column under active carbon/coke inhibition, flue gas is uniformly distributed in purifying column
To each position, contacted with the active carbon/coke for leaning on gravity slowly to move from up to down, the SO in flue gas2It is de- by active carbon/coke absorption
It removes, while under the catalytic action of active carbon/coke, NO in flue gasxIt has catalytic reduction reaction with ammonia gas and generates N2, thus flue gas
Middle NOxOther pollutants such as dust by catalytic eliminating, while in flue gas are by active carbon/coke adsorbing and removing.It is active in purifying column
Charcoal/coke is discharged from tower bottom under the effect of gravity, at the top of old material carrier lift to regenerator, send to regenerator and is parsed again
It is raw, activity recovery charcoal/coke adsorption activity.Active carbon/coke is discharged from tower bottom under the effect of gravity in regenerator, is conveyed by virgin material
Device is promoted at the top of purifying column, is sent to purifying column purifying smoke, active carbon/coke realization recycles.Active carbon/coke parsing regeneration
When generate rich in sulfur dioxide gas, sulfur dioxide volumetric concentration is 5~15%, through the second ammonia water pipeline into absorption tower
Ammonium hydroxide is sprayed into, ammonium hydroxide and sulfur dioxide gas react in absorption tower generates sulphur ammonium, and the ammonium sulfate solution prepared passes through pump conveying
To ammonium sulfate liquor slot, crystallization is concentrated, final products are sulphur ammonium.The exhaust gas that absorption tower generates is mixed into chimney by exhaust emission pipe
Discharge.Actually a kind of active carbon/coke of the utility model-flue gas adverse current integrated purifying CCMB (Activated Carbon
Countercurrent Moving Bed) technology, denitration is carried out before active carbon/coke desulfurization, is produced when being regenerated to active carbon/coke
Raw sulfur dioxide gas recycling, obtains by-product sulphur ammonium.The utility model solves prior art active carbon/coke denitration efficiency
The technical difficulty such as not high, desulfurizing byproduct processing, reach coke oven chimney exhaust gas multi-pollutant comprehensive treatment and by-product resource
Change comprehensive utilization purpose, realizes the discharge of coke oven chimney exhaust gas stably reaching standard.
Further, active carbon/coke conveying equipment is had bad luck between purifying column and regenerator selects splicing+batch turning mode,
Conveyer is Z-shaped bucket chain conveyor (also known as LD bucket machine), and separate unit conveyer has horizontal feed+vertical-lift+horizontal feed
Function.1. this design can be realized active carbon/coke continuative transport, compact-sized, high-efficient, reduces and has bad luck a little, reduces
Active carbon/coke falls damage；2. being not necessarily to multiple devices relay, dynamic equipment number is reduced, equipment failure rate is reduced, it is steady to improve operation
It is qualitative.
Further, virgin material storage bin can be used for storing active carbon/coke virgin material.
Further, previous active carbon/coke desulfuring and denitrifying apparatus engineering operation experience, the regeneration gas that regenerator generates are drawn
Conveying fan easily breaks down, the reason is that containing high-concentration sulfur dioxide, high-moisture and dusty, regeneration gas acid dew in regeneration gas
Point is higher, and regeneration blower easily corrodes, and influences device operating rate.In conjunction with coking smoke characteristic, therefore the utility model is cancelled
Regeneration gas conveying fan on regenerator, and heat exchange booster fan negative pressure ventilation is used, it ensure that high stable when system operation
Property.
Further, the spy that multiple spray ammonia lancets are low to coke oven chimney exhaust gas sulfur dioxide concentration, nitrous oxides concentration is high
Point and the high denitration requirement of coking, requirement height are uniformly mixed to ammonia, the application is developed for coke oven chimney exhaust gas with flue gas
The spray ammonia technology of integrated purifying.Denitrification reducing agent selects highly-safe ammonium hydroxide, and multiple spray ammonia are arranged in the first ammonia water pipeline
Mouthful, ammonium hydroxide is evaporated to ammonia and steam using the heat of flue gas, this pervaporation mode can guarantee ammonia and flue gas as early as possible
It is uniformly mixed, makes full use of active carbon/coke denitration performance, improve denitration efficiency, reduce denitrification reducing agent consumption, reduce ammonia and escape
Ease.The utility model is evaporated to the equipment or system of ammonia without ammonium hydroxide, can simplify system flow, reduces systematic running cost
With raising system run all right.
Further, the coke oven chimney exhaust gas for 200 DEG C of temperature or more, can first using flue gas-flue gas heat-exchange unit or
Residual heat boiler for exchanging heat, partial heat in recovered flue gas, then be further cooled to by flue gas-air heat exchanger, flue gas after cooling
Into purifying column.
Further, for purifying column and the uniform discharge requirement of two key equipments of regenerator, the utility model is selected
It is suitble to the long axis discharger of active carbon/coke solid material as discharge apparatus.According to experimental study and engineer application, long axis is unloaded
Glassware can be realized entire material uniform plane decline.The lower part of purifying column ontology sets several discharge cone buckets, minimizes object
The influence of wall effect when stream is dynamic；Fiaring cone is set inside regenerator discharging cone bucket, slows down intermediate active charcoal/coke flowing as far as possible
Speed keeps entire cone bucket section Flow of Goods and Materials speed relatively uniform.Purified exhaust gas is drawn by purified gas discharge tube, whole
A process resistance is overcome by booster fan.
Detailed description of the invention
Fig. 1 is the utility model based on active carbon/coke coke oven flue gas system for desulfuration and denitration total figure.
In figure, 1- purifying column, 11- smoke inlet pipe road, 12- purified gas exhaust pipe, 13- flue gas-air heat exchanger,
14- air blower, 15- flue gas-flue gas heat-exchange unit or waste heat boiler, 16- overhead feed bin, 17- original flue gas on-line detecting system, 2-
Regenerator, 21- regenerate feed channel, 22- hot-blast stove, 23- high-temperature heat exchange tube road, 24- heat exchange booster fan, 25- low-temperature heat exchange pipe
Road, 26- blower, 27- exhaust piping, the absorption tower 3-, 31- ammonium sulfate solution pipeline, 32- exhausting waste gas pipeline, 4- conveyer, 41-
Old material conveyer, 42- virgin material conveyer, 5- ammonia water spray system, 51- ammonium hydroxide reservoir, the first ammonia water pipeline of 52-, 53- second
Ammonia water pipeline, 54- ammonia water spray controller, 6- chimney, 61- booster fan, 62- purified gas on-line detecting system, 7- storage bin,
81- discharge cone bucket, 82- long axis discharger, 83- double spool discharger, 84- vibrating screen, 85- ash can or trolley, 9- electric hoist.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, the present embodiment includes active carbon/coke based on active carbon/coke coke oven flue gas system for desulfuration and denitration
Column for smoke purification 1 and active carbon/coke regenerator 2 are connected with smoke inlet pipe road 11 and purified gas exhaust pipe on purifying column 1
12, smoke inlet pipe road 11 is located at 12 lower section of purified gas exhaust pipe, and it is defeated that active carbon/coke is equipped between purifying column 1 and regenerator 2
Device 4 is sent, high-temperature heating system and regeneration feed channel 21 are connected on the regenerator 2, the system for desulfuration and denitration further includes cigarette
Chimney 6, ammonia water spray system 5 and absorption tower 3, the ammonia water spray system 5 include ammonium hydroxide reservoir 51, are connected on ammonium hydroxide reservoir 51
It is connected to the first ammonia water pipeline 52 and the second ammonia water pipeline 53 being arranged in parallel, the first ammonia water pipeline 52 and the second ammonia water pipeline 53 are divided
It is not passed into smoke inlet pipe road 11 and absorption tower 3,3 bottom of absorption tower is connected with ammonium sulfate solution pipeline 31, top connects
It is connected to exhausting waste gas pipeline 32, the regeneration feed channel 21 is passed into absorption tower 3, the purified gas exhaust pipe 12 and exhaust gas
Exhaust pipe 32 is passed through chimney 6, and the active carbon/coke conveyer 4 includes being delivered to active carbon/coke of 2 bottom of purifying column
The old material conveyer 41 at 2 top of regenerator and the virgin material that active carbon/coke of 2 bottom of regenerator is delivered to 1 top of purifying column are defeated
Send device 42.
The old material conveyer 41 and virgin material conveyer 42 are Z-type bucket chain conveyor, and Z-type bucket chain conveyor includes one
Vertical-lifting portion and two horizontal feed portions for being separately positioned on vertical-lifting portion both ends.The regenerator is externally provided with virgin material storing
Storehouse 7,7 top of storage bin are connect with regenerator 2, and lower part is passed into the horizontal feed portion of the lower part of virgin material conveyer 42.
The high-temperature heating system includes hot-blast stove 22 and high-temperature heat exchange tube road 23, hot-blast stove 22 be used for outside air and
Blast furnace gas pipeline connection, high-temperature heat exchange tube road 23 include the hot wind admission line being connected between hot-blast stove 22 and regenerator 2
With hot wind exhaust pipe, the hot wind exhaust pipe is equipped with heat exchange booster fan 24.The present embodiment uses hot wind stove heating,
In other embodiments, hot-blast stove can be replaced with into electric heater.
The end that first ammonia water pipeline 52 is connect with smoke inlet pipe road 11 is equipped with more than two spray ammonia mouths, each to spray
Ammonia mouth is passed through in smoke inlet pipe road 11, and first ammonia water pipeline 52 is equipped with ammonia water spray controller 54.
The smoke inlet pipe road 11 is equipped with flue gas-air heat exchanger 13, and connection is free on flue gas-air heat exchanger 13
Gas blower 14 is equipped with flue gas-flue gas heat-exchange unit or waste heat pot between the smoke inlet pipe road 11 and purified gas exhaust pipe 12
Furnace 15, the position of flue gas-flue gas heat-exchange unit or waste heat boiler 15 on smoke inlet pipe road 11 are located at flue gas-air heat exchanger 13
Before.
Chimney 6, purified gas exhaust pipe 12 are passed through after 32 parallel connection of the purified gas exhaust pipe 12 and exhausting waste gas pipeline
It is equipped with booster fan 61 with the pipeline after 32 parallel connection of exhausting waste gas pipeline, is equipped with overhead feed bin 16 at the top of the purifying column 1, only
Change gas exhaust pipe and smoke inlet pipe road is located at the position below overhead feed bin, the purifying column 1 and 2 bottom of regenerator are all provided with
There is discharge cone bucket 81, purify the discharge cone bucket of tower bottom as two or more, be equipped with long axis discharger 82 in each discharge cone bucket,
82 bottom of long axis discharger is equipped with double spool discharger 83, is equipped with fiaring cone in the discharge cone bucket of regenerator.Regenerator double spool
The bottom of discharger 83 is equipped with vibrating screen 84, and vibration lower part of screen is equipped with ash can or trolley 85.
Level-sensing device is equipped at the top of overhead feed bin and regenerator.2 bottom of regenerator is equipped with low-temperature heat exchange pipeline 25, and low temperature changes
Heat pipeline is equipped with blower 26.2 top of regenerator is also connected with the exhaust piping 27 for being passed through chimney.Electricity is equipped at the top of storage bin 7
Cucurbit 9.Chimney 6 is equipped with neat stress on-line detecting system 62, and smoke inlet pipe road is equipped with former flue gas on-line detecting system 17.
When system is run, first coke oven chimney exhaust gas is drawn from underground flue flap valve or slide valve upstream, each branch
One automatic valve is set on flue, and the former flue gas after merging enters smoke inlet pipe road, suitable before former flue gas enters purifying column
Position, ammonium hydroxide is sprayed into smoke inlet pipe road by the first ammonia water pipeline, ammonium hydroxide is gasified as ammonia using high-temperature flue gas.
Flue gas enters flue gas-flue gas heat-exchange unit together with the ammonia after gasification or waste heat boiler is cooled to 160 DEG C -200 DEG C, using cigarette
Gas-air heat exchanger is cooled to 110 DEG C -140 DEG C, and the flue gas after cooling enters purification by smoke inlet pipe road together with ammonia
Tower, in purifying column under active carbon/coke inhibition, flue gas is evenly distributed to each position in purifying column, and leans on from up to down
The active carbon that gravity slowly moves/coke contacts, the SO in flue gas2By active carbon/coke adsorbing and removing, while in active carbon/coke
Under catalytic action, NO in flue gasxIt has catalytic reduction reaction with ammonia gas and generates N2, thus NO in flue gasxBy catalytic eliminating, simultaneously
Other pollutants such as dust in flue gas are by active carbon/coke adsorbing and removing.Purified exhaust gas is drawn by purified gas discharge tube,
By flue gas-flue gas heat-exchange unit and former flue gas heat exchange, send after promoting temperature to smoke stack emission, whole process resistance is by booster fan
Overcome.
Active carbon/coke under the effect of gravity, is discharged, by Z-type chain bucket by purification tower bottom long axis discharger in purifying column
Conveyer (also known as LD bucket machine) is promoted at the top of regenerator, is sent to regenerator and is carried out parsing regeneration, the suction of activity recovery charcoal/coke
Attached activity.Active carbon/coke under the effect of gravity, is arranged by the discharge cone bucket and long axis discharger that regenerate tower bottom in regenerator
Out, it is promoted at the top of purifying column, is sent to purifying column purifying smoke, active carbon/coke by Z-type bucket chain conveyor (also known as LD bucket machine)
Realization recycles.Virgin material storage bin can be used for storing active carbon/coke virgin material.
What is generated when active carbon/coke parsing regeneration is rich in sulfur dioxide gas, and sulfur dioxide volumetric concentration is 5~15%,
Ammonium hydroxide is sprayed into absorption tower by the second ammonia water pipeline, ammonium hydroxide and sulfur dioxide gas react in absorption tower generates sulphur ammonium,
The ammonium sulfate solution prepared is delivered to ammonium sulfate liquor slot by pump, concentrates crystallization, final products are sulphur ammonium.It is specific in absorption tower
Absorption process are as follows: enter the first order absorption section on absorption tower through inlet duct rich in sulfur dioxide gas, circulation fluid and flue gas are abundant
Contact removes most of sulfur dioxide in flue gas；Flue gas enters back into second level absorber portion, further scrubbing CO_2 later；
Top of tower is equipped with one section of washing section for recycling circulation fluid；Purified tail gas is removed in flue gas by the demister on absorption tower top
Fine droplet, last clean tail gas is mixed into smoke stack emission by exhaust emission pipe.Whole process resistance is by booster fan
Overcome.
Advantage and effect possessed by the utility model:
(1) it develops coke oven chimney exhaust gas desulphurization denitration active carbon/coke integrated purification technology: being completed in a Tai Tanei burnt
Furnace chimney exhaust gas desulphurization denitration dedusting is not necessarily to series multistage technology.
(2) have high denitration efficiency: denitration efficiency meets the high denitration purification of coke oven chimney exhaust gas and requires up to 90%.
(3) byproduct and comprehensive utilization of waste technology of suitable coke oven chimney exhaust gas integrated purifying are developed:
A, it is rich in sulfur dioxide gas:
Active carbon/coke adsorbs sulfur dioxide in flue gas in purifying column, enters parsing regenerator by conveying equipment, in height
Regeneration gas containing high-concentration sulfur dioxide is released under temperature effect.
Country's boiler, coloured, sintering every profession and trade active carbon/coke flue gas purification device regeneration gas are used to production sulphur at present
Acid send plant area's sulfuric acid plant or su lphur acid production.Since coking industry is since exhaust gas volumn is small, sulfur dioxide concentration is low, sulfuric acid year
Yield only has several hundred tons, and well below the minimum scale of sulfuric acid industry device, and coke-oven plant is without sulfuric acid plant, therefore is rich in sulfur dioxide
How regeneration gas is using being the most important thing problem that must be solved.
The utility model is that the coal gas that coking generates is containing there are many for recycling by making thorough investigation and study to coking industry process
The ingredient utilized, ammonia is as one of the toxic component in production process, though content is less since there is its aqueous solution corrosion to set
Standby and pipeline, the ammonium salt of production can cause to block, the nitrogen oxides pollution atmosphere for generation of burning, so coke-oven plant requires to recycle
Ammonia in coal gas, and be used.The production of sulphur ammonium has not only reached the purpose for removing ammonia in coal gas, and sulphur ammonium is answered as chemical fertilizer
For the yield per unit area of crops to can be improved in agricultural, play an important role to the development of agricultural.The utility model warp
It crosses and ammonium sulfate workshop section is understood in depth, develop the technology rich in sulfur dioxide regeneration gas preparation sulphur ammonium, absorption tower is more using adverse current
Function desulfurizing tower, the interior concentration of tower, tower external oxidation, process flow is simple, occupied area is small, does not produce secondary pollution.To SO in flue gas2
The high operating condition of content, benefit are especially apparent.
B, active carbon/coke powder end:
Active carbon/coke powder is mainly vibrating screen screenings, and diameter is less than 1mm, can return Coal Blending System in independent coke-oven plant, with
Enter coke oven production coke after feed coal mixing；It can be used as coal dust in integrated iron and steel works and enter sintered material or entrance blast furnace spray
Coal measures system, realizes comprehensive utilization.
(4) the spray ammonia technology of suitable coke oven chimney exhaust gas integrated purifying is developed:
The SO in flue gas can be directly absorbed due to active carbon/coke2, and remove the NO in flue gasxIt then needs to spray ammonia, ammonia pair
SO2Equally also there is removing effect.Under normal circumstances, SO2Elimination reaction prior to NOxElimination reaction.SO in flue gas2Concentration
When higher, that carry out in active carbon/coke is SO2Elimination reaction；On the contrary, SO in flue gas2When concentration is lower, NOxElimination reaction accounts for master
Lead status.
The high denitration of feature and coking low for coke oven chimney exhaust gas sulfur dioxide concentration, nitrous oxides concentration is high is wanted
It asks, is uniformly mixed requirement height with flue gas to ammonia, the application develops the spray ammonia technology for coke oven chimney exhaust gas integrated purifying.
Denitrification reducing agent selects highly-safe ammonium hydroxide, and multiple spray ammonia mouths are arranged in the first ammonia water pipeline, will using the heat of flue gas
Ammonium hydroxide is evaporated to ammonia and steam, and this pervaporation mode can guarantee that ammonia is uniformly mixed as early as possible with flue gas, make full use of work
Property charcoal/coke catalytic denitration performance, improve denitration efficiency, reduce denitrification reducing agent consumption, reduce the escaping of ammonia.The utility model without
It needs ammonium hydroxide to be evaporated to the equipment or system of ammonia, can simplify system flow, reduce systematic running cost and use, it is steady to improve system operation
It is qualitative.
(5) whole uniformly discharge technology is developed:
Since purifying column cross dimensions is bigger (up to 12m × 4.8m), it is very easy to Biased flow phenomenon occur, to reach
Active carbon/coke is consistent with level adsorption capacity in purifying column, and the purifying column section bed of material need to realize overall flow.Parsing regenerated
The bed of material of the entire section of range request regenerator realizes bulk flow, is evenly heated and cools down to reach active carbon/coke, realizes activity
The abundant parsing of charcoal/coke.
For purifying column and the uniform discharge requirement of two key equipments of regenerator, the application has selected suitable active carbon/coke
The long axis discharger of solid material is as discharge apparatus.According to experimental study and engineer application, long axis discharger be can be realized
Entire material uniform plane decline.The lower part of purifying column ontology sets several discharge cone buckets, side wall when minimizing Flow of Goods and Materials
The influence of effect；Fiaring cone is set inside regenerator discharging cone bucket, slows down intermediate active charcoal/coke flowing velocity as far as possible, keeps whole
A cone bucket section Flow of Goods and Materials speed is relatively uniform.
(6) suitable coke oven flue gas exhuast gas desulfurization denitration active carbon/coke integrated purifying Process configuration is developed:
A, active carbon/coke conveying equipment is had bad luck between purifying column and regenerator and selects splicing+batch turning mode, using Z-type
Bucket chain conveyor (also known as LD bucket machine), separate unit conveyer have horizontal feed+vertical-lift+horizontal feed function.It is this to set
1. meter can be realized active carbon/coke continuative transport, compact-sized, high-efficient, reduces and has bad luck a little, reduces active carbon/coke
Fall damage；2. being not necessarily to multiple devices relay, dynamic equipment number is reduced, equipment failure rate is reduced, improves operation stability.
B, the flue gas pollutant complicated component of coke oven discharge outside denitrification, sulfur dioxide, also contains one oxygen of high concentration
Change carbon, carbon dioxide, hydrogen sulfide, hydrogen cyanide, residual ammonia, phenol and coal dust, tar etc., in order to ensure work circumstances safe, will increase
Pressure fan is arranged in flue gas desulfurization and denitrification system downstream, prevents flue gas and leaks, avoids the occurrence of personnel's unexpected injury.
C, previous active carbon/coke desulfuring and denitrifying apparatus engineering operation experience is drawn, the regeneration gas that regenerator generates conveys wind
Machine easily breaks down, the reason is that containing high-concentration sulfur dioxide, high-moisture and dusty in regeneration gas, regeneration gas acid dew point compared with
Height, regeneration blower easily corrode, and influence device operating rate.In conjunction with coking smoke characteristic, the utility model is cancelled on regenerator
Regeneration gas conveying fan, and use heat exchange booster fan negative pressure ventilation, ensure that system operation when high stability.
D, the temperature adjustment measure provided with suitable coke oven chimney exhaust gas: for 200 DEG C of temperature or more of coke oven chimney exhaust gas, one
As steam is first generated using waste heat boiler, partial heat in recovered flue gas.Flue gas from coke oven combustion chamber, through regenerative chamber, tiltedly
Road, bottom flue enter underground and divide flue, are then aggregated into underground main chimney flue.The aperture before existing underground main chimney flue turnover panel, by cigarette
Gas is drawn from underground flue, into ground steel flue.Flue gas is greater than 200 DEG C through ground steel flue temperature, into remaining flue gas-
Flue gas heat-exchange unit or hot pot furnace system evaporator section, flue gas reduce the temperature to 180 DEG C hereinafter, passing through flue gas-air again through evaporator section
Heat exchanger is further cooled to 110-140 DEG C, and flue gas enters purifying column scrubbing CO_2, nitrogen oxides, dust after cooling.
For 200 DEG C of coke oven flue gas below of temperature, according to the full factory's energy medium service condition difference of owner using different
Cooling measure.Partial heat in Recovery of the hot water flue gas can be generated using waste heat boiler, cooled down using flue gas-air heat exchanger
To 110-140 DEG C of laggard purifying column；Also flue gas-air heat exchanger can be directly used and be cooled to 110-140 DEG C of laggard purifying column；
Also flue gas-flue gas heat-exchange unit can be set and replace waste heat boiler, high-temperature-coked flue gas and purifying column treated purified gas
Indirect heat exchange, from the neat stress temperature of smoke stack emission up to 150~170 DEG C, high-temperature-coked flue gas cools down in advance, using flue gas-
Air heat exchanger is cooled to 110-140 DEG C of laggard purifying column.
The utility model is applicant by adsorbing to the flue gas multiple pollutant regularity of distribution and active carbon/coke to multi-pollutant
It is integrated net creatively to develop active carbon/coke-flue gas adverse current in conjunction with many project application experience for mechanism, parsing mechanism study
Change CCMB (Activated Carbon Countercurrent Moving Bed) technology, solve prior art active carbon/
The technical difficulty such as burnt denitration efficiency is high, desulfurizing byproduct processing, reach coke oven chimney exhaust gas multi-pollutant comprehensive treatment and
By-product resource comprehensively utilizes purpose, realizes the discharge of coke oven chimney exhaust gas stably reaching standard.
It is two specific examples of Tthe utility model system application below:
First factory is existing 5#, 6#, 7#, 8#, 9# and 10# coke oven in certain coke-oven plant of Iron And Steel Co., Ltd, and fuel is blast furnace coal
Gas, using pollutant in the active carbon/coke CCMB technical treatment coke oven flue gas of the utility model, particulate matter after flue gas emission purification
≤10mg/m3、SO2≤8mg/m3、NOx≤100mg/m3。
Company B is existing 1#, 2# coke oven of certain Coking and Gas Co., Ltd, and fuel is coke-stove gas, uses the utility model
Active carbon/coke CCMB technical treatment coke oven flue gas in pollutant, flue gas emission purification after particulate matter≤10mg/m3、SO2≤
10mg/m3、NOx≤130mg/m3。
Two kinds of fuel flue gas comparisons see the table below, and no matter coke oven uses blast furnace gas or coke-stove gas, and discharge value is far below and sets
Meter standard, more below special emission limit national standard.
As seen from the above table, the active carbon/coke of the utility model-flue gas adverse current integrated purifying CCMB technology is suitable for blast furnace
The coke oven chimney exhaust gas of coal gas, coke-stove gas and mixed gas, any sort coke oven chimney exhaust gas suitable for coking industry.
The unmentioned part of the utility model is same as the prior art or can be realized by the prior art.
Above-described embodiment is the utility model preferred embodiment, although in the embodiment above to the utility model
Embodiment be described in detail, but the utility model is not limited to above-mentioned embodiment, and the attached claims are limited
Fixed the scope of the utility model includes all equivalent substitutions and variation.
Claims (9)
1. a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration, including active carbon/coke column for smoke purification (1) and work
Property charcoal/coke regenerator (2) is connected with smoke inlet pipe road (11) and purified gas exhaust pipe (12) on purifying column (1), purifying column
(1) active carbon/coke conveyer (4) is equipped between regenerator (2), be connected on the regenerator (2) high-temperature heating system with
It regenerates feed channel (21), it is characterised in that: the system for desulfuration and denitration further includes chimney (6), ammonia water spray system (5) and absorbs
Tower (3), the ammonia water spray system (5) include ammonium hydroxide reservoir (51), is connected with and is arranged in parallel on ammonium hydroxide reservoir (51)
First ammonia water pipeline (52) and the second ammonia water pipeline (53), the first ammonia water pipeline (52) and the second ammonia water pipeline (53) are each led into
In to smoke inlet pipe road (11) and absorption tower (3), absorption tower (3) bottom is connected with ammonium sulfate solution pipeline (31), top
It is connected with exhausting waste gas pipeline (32), the regeneration feed channel (21) is passed into absorption tower (3), the purified gas exhaust pipe
(12) it is passed through chimney (6) with exhausting waste gas pipeline (32), the active carbon/coke conveyer (4) includes by purifying column (1) bottom
Active carbon/coke be delivered to old material conveyer (41) at the top of regenerator (2) and active carbon/coke of regenerator (2) bottom is defeated
It send to the virgin material conveyer (42) at the top of purifying column (1).
2. according to claim 1 based on active carbon/coke coke oven flue gas system for desulfuration and denitration, it is characterised in that: described
Old material conveyer (41) and virgin material conveyer (42) are Z-type bucket chain conveyor, and Z-type bucket chain conveyor includes a vertical-lifting
Portion and two horizontal feed portions for being separately positioned on vertical-lifting portion both ends.
3. according to claim 2 based on active carbon/coke coke oven flue gas system for desulfuration and denitration, it is characterised in that: described
Regenerator is externally provided with virgin material storage bin (7), and storage bin (7) top is connect with regenerator (2), and lower part is passed into virgin material conveyer
(42) in the horizontal feed portion of lower part.
4. according to claim 1 based on active carbon/coke coke oven flue gas system for desulfuration and denitration, it is characterised in that: described
High-temperature heating system includes hot-blast stove/electric heater (22) and high-temperature heat exchange tube road (23), and hot-blast stove/electric heater (22) is used for
Connect with outside air and blast furnace gas pipeline, high-temperature heat exchange tube road (23) include be connected to hot-blast stove/electric heater (22) and
Hot wind admission line and hot wind exhaust pipe between regenerator (2), the hot wind exhaust pipe are equipped with heat exchange booster fan
(24).
5. according to claim 1 based on active carbon/coke coke oven flue gas system for desulfuration and denitration, it is characterised in that: described
The end that first ammonia water pipeline (52) is connect with smoke inlet pipe road (11) is equipped with more than two spray ammonia mouths, and each ammonia mouth that sprays leads to
Enter in smoke inlet pipe road (11), first ammonia water pipeline (52) is equipped with ammonia water spray controller (54).
6. according to claim 1 based on active carbon/coke coke oven flue gas system for desulfuration and denitration, it is characterised in that: described
Smoke inlet pipe road (11) is equipped with flue gas-air heat exchanger (13), and flue gas-air heat exchanger is connected with air blower on (13)
(14), flue gas-flue gas heat-exchange unit or waste heat pot are equipped between the smoke inlet pipe road (11) and purified gas exhaust pipe (12)
Furnace (15), the position of flue gas-flue gas heat-exchange unit or waste heat boiler (15) on smoke inlet pipe road (11) are changed positioned at flue gas-air
Before hot device (13).
7. according to claim 1 based on active carbon/coke coke oven flue gas system for desulfuration and denitration, it is characterised in that: described
It is passed through chimney (6), purified gas exhaust pipe (12) and gives up after purified gas exhaust pipe (12) and exhausting waste gas pipeline (32) are in parallel
Pipeline after gas exhaust pipe (32) is in parallel is equipped with booster fan (61).
8. according to claim 1 based on active carbon/coke coke oven flue gas system for desulfuration and denitration, it is characterised in that: described
Overhead feed bin (16) are equipped at the top of purifying column (1).
9. according to claim 1 based on active carbon/coke coke oven flue gas system for desulfuration and denitration, it is characterised in that: described
Purifying column (1) and regenerator (2) bottom are equipped with discharge cone bucket (81), purify the discharge cone bucket of tower bottom for two or more, often
It being equipped with long axis discharger (82) in a discharge cone bucket (81), long axis discharger (82) bottom is equipped with double spool discharger (83),
Fiaring cone is equipped in the discharge cone bucket of regenerator.
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|---|---|---|---|
| CN201820473812.1U CN208177248U (en) | 2018-04-04 | 2018-04-04 | It is a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820473812.1U CN208177248U (en) | 2018-04-04 | 2018-04-04 | It is a kind of based on active carbon/coke coke oven flue gas system for desulfuration and denitration |
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| CN208177248U true CN208177248U (en) | 2018-12-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380041A (en) * | 2018-04-04 | 2018-08-10 | 南京泽众环保科技有限公司 | A kind of coke oven flue gas system for desulfuration and denitration and method based on activated carbon/coke |
| CN110053887A (en) * | 2019-05-07 | 2019-07-26 | 上海三融环保工程有限公司 | A kind of cement plant powder denitrfying agent conveying device and its application method |
| CN113493711A (en) * | 2020-04-08 | 2021-10-12 | 中国石油天然气股份有限公司 | Corrosion control device and lean amine liquid regeneration system |
| CN114192128A (en) * | 2021-12-13 | 2022-03-18 | 温州一霖再生资源有限公司 | Activated carbon regeneration equipment with exhaust-heat boiler |
-
2018
- 2018-04-04 CN CN201820473812.1U patent/CN208177248U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380041A (en) * | 2018-04-04 | 2018-08-10 | 南京泽众环保科技有限公司 | A kind of coke oven flue gas system for desulfuration and denitration and method based on activated carbon/coke |
| CN110053887A (en) * | 2019-05-07 | 2019-07-26 | 上海三融环保工程有限公司 | A kind of cement plant powder denitrfying agent conveying device and its application method |
| CN113493711A (en) * | 2020-04-08 | 2021-10-12 | 中国石油天然气股份有限公司 | Corrosion control device and lean amine liquid regeneration system |
| CN114192128A (en) * | 2021-12-13 | 2022-03-18 | 温州一霖再生资源有限公司 | Activated carbon regeneration equipment with exhaust-heat boiler |
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