CN209341270U - A kind of environment-friendly type resource utilization system of organic exhaust gas containing chlorine - Google Patents
A kind of environment-friendly type resource utilization system of organic exhaust gas containing chlorine Download PDFInfo
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- CN209341270U CN209341270U CN201821771471.2U CN201821771471U CN209341270U CN 209341270 U CN209341270 U CN 209341270U CN 201821771471 U CN201821771471 U CN 201821771471U CN 209341270 U CN209341270 U CN 209341270U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a kind of environment-friendly type resource utilization systems of organic exhaust gas containing chlorine, by the way that high temperature incineration, waste heat recycling, HCl absorb, lye neutralizes, SCR denitration realizes the environmental protection of " three change ", power conservation requirement.Its overall structure mainly includes insulation incinerator, horizontal smoke tube exhaust-heat boiler, graphite chilling tower, the absorption tower graphite HCl, depickling packed tower, flue gas reheater, SCR denitration device and chimney.Chlorinated organics in exhaust gas decompose at high temperature, and chlorine element generates HCl gas in conjunction with protium, recycle heat by waste heat boiler, absorb HCl gas using chilling tower and absorption tower, generate the hydrochloric acid of 20% or so concentration.After flue gas is using extracting tower and SCR denitration, and atmosphere is discharged by chimney.The utility model has the characteristics that manufacturing process is simple, easy to maintenance, operational safety is stable, resource recycling rate is high, is suitable for that the industries such as chemical industry, pesticide handle the clean popularization and use of organic exhaust gas containing chlorine.
Description
Technical field
The utility model relates to energy conservation and environmental protection industry, it is specially a kind of industries such as chemical industry, pesticide, printing and dyeing in production process
The clean organic exhaust gas containing chlorine of middle generation carries out the cellular system of harmless treatment and resource utilization.
Background technique
In recent years, with the rapid development of economy, often being produced in the production process of the industries such as chemical industry, pesticide, printing and dyeing
Raw some exhaust gas containing chlorine element, wherein the existence form of chlorine element is mainly chlorine, hydrogen chloride and having containing chlorine element
Machine object.Chlorinated organics are largely macromolecular structure, and wherein chlorinated aromatic hydrocarbons have toxicity, and chemical property is stablized, it is difficult to raw
Object degradation, can retain for a long time in the environment；Chlorine has toxicity, and the harm to plant is twice of sulfur dioxide, with
Humid air contact can be with forming salt acid fume mist；Hydrogen chloride has stinkpot, has strong stimulation to the upper respiratory tract, to eye, skin, sticks
Film has corrosion.Therefore, these exhaust gas cannot be directly discharged in the Nature, otherwise can cause environmental pollution, and destroy ecological ring
Human health is damaged in border.A kind of reasonable, effective processing technology of organic exhaust gas containing chlorine is thus found, so that it is useless to reduce the part
Pollution of the gas to environment is of great significance to promotion environment and industry value chain.Currently, the country is for organic waste containing chlorine
The processing method of gas mainly has absorption-analytic method, catalytic oxidation, thermal decomposition method, high temperature incineration method etc..
Absorption-analytic method primary attachment carrier is active carbon and silica gel, at a lower temperature to the chlorination in exhaust gas
Object is adsorbed, and can be parsed at high temperature.But existing physical absorption also has chemisorption in adsorption process, chemistry is inhaled
Attached middle school's absorption carrier can react with chlorinated organics, so absorption carrier is that a kind of consumables must in actual application
New absorption carrier need be continuously added to guarantee the removal rate of chloride in exhaust gas.
Catalytic oxidation is in the presence of a catalyst, to reduce reaction activity, make in the lower situation of temperature just
It can be chlorinated organics oxygenolysis at CO2、H2O, HCl and a small amount of Cl2, the operation temperature of the method is generally in 100-300
DEG C, but dioxin-like chemical can be generated in this temperature range, dioxin-like chemical has severe toxicity, has to environment and human body
Very big influence.
Thermal decomposition method carries out oxygenolysis to chlorine contained exhaust gas using regenerative oxidation, and oxidizing temperature can reach 800 DEG C or more,
It can be avoided the generation of dioxin.However, since the HCl of chlorine contained exhaust gas regenerative oxidation generation is to pipeline and regenerative oxidation switching valve
Serious chloride ion corrosion is generated, switching valve sealing is generally sealed using the softwood matter of the resisting corrosion of chlorine ion such as polytetrafluoroethylene (PTFE),
But this sealing material can not use under 1200 DEG C or more of operating condition, when exhaust gas temperature is higher, not can guarantee the steady of device
Fixed operation；Switching valve sealing also can choose the alloy with resisting corrosion of chlorine ion ability and seal firmly, but the cost of this valve is
3-5 times of common valve cost considerably increases the construction cost of device.
The patent of grant number CN103736378 B provides a kind of absorption system containing chlorine, comprising: prewashing tower, first stage tower, two
Grade tower and connect with second level tower plus alkali pump, there are also control devices, from adding alkali pump that liquid alkaline is added into second level tower, when control device inspection
When measuring the pH value of first stage tower absorbing liquid lower than standard value, first stage tower absorbing liquid is discharged to prewashing tower, second level tower absorbing liquid automatically
Automatically it is discharged to first stage tower；When control device detects the pH value of the cleaning solution in prewashing tower lower than standard value, cleaning solution is certainly
Dynamic discharge, first stage tower absorbing liquid are discharged to automatically in prewashing tower.The device is easy to connect although structure is simple, while can guarantee and contain
Chlorine flue gas is adequately neutralized, however on the one hand since the present apparatus needs to prepare a large amount of lye, and waste most of cigarette
Gas heat.On the other hand, the utilization rate of flue gas is extremely low, and is not excluded for containing NO in flue gasXDeng other pollutant discharge beyond standards,
It is difficult to meet the requirement of prevention and cure of pollution and the utilization of resources.
The patent of grant number CN101634453 A proposes one kind burned waste gas flue gas emergency cooling process of waste liquid containing chlorine and its dress
It sets, process route is that will contain chlorine waste liquid/exhaust gas to be sent in incinerator, makes the temperature liter in incinerator by burning auxiliary fuel
Height makes chlorinated organics oxygenolysis, generates CO2、H2O, HCl and a small amount of Cl2.High-temperature flue gas after burning is directly entered chilling
Tower is quickly cooled to 90 DEG C under the action of the cooling water of penetrating, avoids the generation of dioxin-like chemical.Then flue gas enters de-
The HCl and Cl in flue gas are neutralized after acid tower with lye2, the flue gas after alkali cleaning, which reaches, is discharged into atmosphere by chimney after discharge standard.
The patent process unit mainly includes incinerator, chilling tower, extracting tower, chimney etc., and chilling tower carries out flue gas with circulation acid solution
Chilling is discharged after acid solution reaches a certain concentration.The patent can will contain the decomposition of chlorine organic exhaust gas complete oxidation, pollutant emission
Meet national standard.But the patent technique contains following disadvantage: (1), due to standard providing the burning of chlorinated organics
Temperature has to be larger than 1200 DEG C, the direct chilling of the flue gas of so high-temperature, has not only wasted huge heat, but also for
The material requirements of chilling tower is also very high, must be requested that chilling tower material has good thermal shock resistance, and from 1200 DEG C of chillings
To 90 DEG C, the consumption of cooling water is huge.(2) when high temperature incineration, the nitrogen in organic matter can generate NOX, 1200
DEG C when thermal NOXAlso it can generate, which does not consider NOXRemoving, in the increasingly strict situation of environmental requirement
Under, patent flue gas emission NOXConcentration is difficult up to standard.(3) the patent process flow only arranges that level-one chilling tower absorbs in flue gas
HCl, with circulation acid strength it is increasing, absorption efficiency can have more HCl to escape into extracting tower worse and worse, need
More lye are consumed, more neutral brines are generated, increase subsequent water process burden.
Utility model content
The purpose of this utility model is: in view of the above-mentioned defects in the prior art, provide a kind of danger wastes destroy by fire rate it is high,
Waste heat recovery efficiency height, HCl recovery efficiency height, simple process, the cleaning resource utilization list of organic exhaust gas containing chlorine easy to maintain
Metasystem.
In order to achieve the above object, implementing following technical scheme:
A kind of environment-friendly type resource utilization system of organic exhaust gas containing chlorine, comprising be insulated incinerator, horizontal smoke tube exhaust-heat boiler,
Graphite chilling tower, the absorption tower HCl, depickling packed tower, flue gas reheater, SCR denitration device, chimney, it is characterised in that: described
Insulation incinerator top is disposed with cell burner, and discarded burner is installed in the cell burner, and auxiliary fuel is direct
It is transported to cell burner, horizontal smoke tube exhaust-heat boiler is set after the insulation incinerator, selecting horizontal boiler is to make
High-temperature flue gas passes through pipe internal heating surface, guarantees that the high-temperature flue gas containing HCl is not leak into the outer casing of boiler.The horizontal smoke pipe
Drum is installed, horizontal smoke tube exhaust-heat boiler and drum form natural convection loop, and drum and gas-distributing cylinder connect above waste heat boiler
It connects, the softened water of outside injection successively enters drum after thermal deaerator, boiler feed pump；More than the horizontal smoke pipe
Arrange that graphite chilling tower, the graphite chilling tower are sequentially connected chilling tower circulating pump and graphite heat exchanger after heat boiler, graphite is anxious
The acid solution of the lower part Leng Ta is successively atomized through over-quenching tower circulating pump, the graphite heat exchanger of graphite chilling tower lower part and chilling tower top
Spray gun returns to graphite chilling tower lower part, forms circulation loop, graphite chilling tower lower part is equipped with acid discharge valve；In the graphite
Arrange that the absorption tower level-one HCl, the absorption tower HCl top are equipped with desalination (operating) water nozzle after chilling tower, desalination (operating) water nozzle lower part has
One layer of bubble-cap, the absorption tower the HCl middle part are arranged packing layer, come into full contact with flue gas in packing layer with circulation acid solution, HCl inhales
The installation site for receiving tower is higher than graphite chilling tower, and the acid solution of the absorption tower HCl lower part is pumped into the absorption tower HCl by absorption tower circulation
Top acid solution nozzle sprays into, and acid solution falls into absorption tower lower part after packing layer from up to down inside the absorption tower HCl, and formation is closed
Close circulation loop；When acid solution is discharged in chilling tower, acid solution is supplemented into graphite chilling tower from the absorption tower HCl, and is absorbed simultaneously from HCl
Desalination (operating) water nozzle in tower top supplements desalted water.Depickling packed tower, the upper end peace of depickling packed tower are arranged behind the absorption tower HCl
Equipped with lye nozzle, one layer of demister is also set up at the top of depickling packed tower 5, removes the large water droplet carried in flue gas, under
Three layers of packing layer are arranged in side from top to bottom, and the form of filler is Pall ring, guarantee that lye comes into full contact with flue gas；Go out from extracting tower
The flue-gas temperature come is 60 DEG C, in order to reach the preference temperature of denitrating catalyst, arranges flue gas again after the depickling packed tower
The left side connection flue gas of heater, the flue gas reheater reheats burner, and auxiliary fuel and combustion air are defeated through pipeline
It is sent to flue gas to reheat in burner, heats flue gas；Flue after the flue gas reheater is disposed with two rows of ammonia nozzles,
Ammonia-spraying grid is set in the subsequent flue of ammonia nozzle, promotes the mixing of ammonia and flue gas, arranges SCR after the ammonia-spraying grid
Denitrification apparatus；Chimney is arranged after SCR denitration device, and air-introduced machine is installed on flue therebetween.
Preferably, the furnace wall of the insulation incinerator is poured using the high alumina refractory casting material of resistance to HCl corrosion,
The service life of insulation incinerator can effectively be extended.
Preferably, steam outlet pipe road there are two setting on the gas-distributing cylinder, one of them connect with thermal deaerator, another
It is connect with external gas utilization unit.
The outstanding feature of the utility model embodies a concentrated reflection of in following technical measures:
(1) horizontal smoke tube exhaust-heat boiler is set after being insulated incinerator, by thermodynamic computing, it is heated designs reasonable boiler
Flue-gas temperature can be reduced to 550 DEG C by face, and it is personal or simultaneously for plant area that most heats in recovered flue gas are used to generate steam
Enter steam pipe network, the secondary pollution for effectively avoiding dioxin pollution object from generating.Waste heat boiler uses horizontal smoke tube exhaust-heat boiler,
It walks high-temperature flue gas in heating surface tube, guarantees that the high-temperature flue gas containing HCl is not easy to leak into the outer casing of boiler, to avoid salt
Acid corrosion boiler.Meanwhile the setting of waste heat boiler reduces the flue-gas temperature into chilling tower, 550 DEG C of flue gas enters chilling
Tower reduces the requirement to chilling tower tower wall material, also saves a large amount of cooling waters.
(2) absorption tower level-one HCl is arranged after chilling tower, further absorbs the HCl in flue gas, and optimizes HCl suction
Receipts system.After over-quenching tower, the HCl content in flue gas is reduced very much, so packing layer is arranged in the absorption tower HCl, makes cigarette
Gas comes into full contact in packing layer with circulation acid solution, guarantees the absorption efficiency of HCl.Due to the amount ratio suction for the HCl that chilling tower absorbs
It is more to receive tower, so the circulation acid solution of chilling tower can quickly reach concentration of emission than the circulation acid solution on absorption tower, when chilling tower
The concentration of circulation acid solution reaches discharge value after discharge processing, is supplemented from the circulation acid solution on the absorption tower HCl to chilling tower, while to
Fresh water is supplemented in absorption tower.In brief, HCl absorption system goes out acid in chilling tower, water is supplemented on absorption tower, thus really real
High concentration acid solution is showed and has absorbed high concentration HCl flue gas, low concentration acid solution absorbs the purpose of low concentration HCl flue gas, and HCl is made to absorb effect
Rate is increased to 99% or more.The heat of circulation acid solution is taken away by the recirculated cooling water in graphite heat exchanger, guarantees to spray into chilling tower
The temperature for recycling acid solution is stablized.
(3) level-one extracting tower is arranged behind the absorption tower HCl, using remaining HCl in NaOH solution and in flue gas and free
Cl2, generate NaCl solution.NaOH solution circulated sprinkling, after the concentration of circulation alkali liquor is reduced to setting value, opening valve will
It is discharged to sewage treatment plant close to neutral salt water, the NaOH solution newly entered is then continued into depickling.
(4) all contain nitrogen in most organic matters, this part nitrogen is oxidized to NO at high temperatureX, Er Qie
In 1200 DEG C of incinerator, thermal NOXProduction quantity it is also bigger, therefore the utility model be provided with SCR denitration device, use
To remove the NO in flue gasX, make the pollutant concentration in flue gas that national emission standard be fully achieved.
The utility model has the beneficial effects that the utility model provides a kind of environment-friendly type resource utilization of organic exhaust gas containing chlorine
System, the drawbacks of eliminating traditional organic waste gas treatment system containing chlorine, make the clean resource utilization unit of organic exhaust gas containing chlorine
System is simpler, perfect, reliable.Specifically, one kind environment-friendly type resource utilization of organic exhaust gas containing chlorine of the utility model
System: the first, incinerator incineration temperature is not less than 1200 DEG C, and the environment protecting that organic principle thoroughly destroys by fire is fully achieved；The second,
Incinerator uses high-alumina refractory castable, anti-HCl corrosion, guarantees that incinerator is long-term, stable operation.Third, the horizontal smoke pipe of setting
Waste heat boiler, the thermal energy for meeting the high-temperature flue gas containing chlorine, which recycles, to be required；4th, two-stage HCl absorption plant is set, and the first order is chilling
Tower, the second level are the absorption tower HCl, so that HCl absorption efficiency is increased to 99% or more, and 20% concentration hydrochloric acid of by-product, have reached HCl
Resource utilization purpose.5th, the utility model total system does not have expansion joint, and thermal expansion is absorbed by channel bend, effectively reduced
System leak point prevents HCl from leaking post-etching equipment.6th, Tthe utility model system can also under specific circumstances clean
It is promoted the use of in net chlorinated waste water resource utilization cellular system.In short, the utility model is gone back while handling exhaust gas
Thermal energy can be recycled and generate steam or hot water, and can generate the hydrochloric acid of 20% or so concentration with the HCl gas in recovered flue gas, reach
To environmentally friendly purpose that is energy saving, reducing waste discharge, resource utilization.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the system flow chart of this resource utilization system.
It is as shown in the figure: 1, insulation incinerator, 2, horizontal smoke tube exhaust-heat boiler, 3, graphite chilling tower, 4, the absorption tower HCl, 5,
Depickling packed tower, 6, flue gas reheater, 7, SCR denitration device, 8, chimney, 9, thermal deaerator, 10, drum, 11, point
Cylinder, 12, graphite heat exchanger, 13, exhaust gas blower, 14, combustion fan, 15, boiler feed pump, 16, chilling tower circulating pump,
17, absorption tower circulating pump, 18, extracting tower circulating pump, 19, air-introduced machine, 20, high-order water pot, 21, cell burner, 22, exhaust gas
Burner, 23, bubble-cap, 24, absorption tower packing layer, 25, demister, 26, extracting tower packing layer, 27, low-temperature denitration catalyst, 28,
Flue gas reheater burner, 29, ammonia-spraying grid, 30, acid discharge valve.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is only a part of preferred embodiment of the utility model, rather than complete
The embodiment in portion.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, is fallen within the protection scope of the utility model.
One kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine as shown in Figure 1, is from left to right the utility model
Flue gas traveling process and capital equipment；Its process equipment specifically includes that insulation incinerator 1, horizontal smoke tube exhaust-heat boiler 2, graphite
Chilling tower 3, the absorption tower HCl 4, depickling packed tower 5, flue gas reheater 6, SCR denitration device 7, chimney 8.One kind is organic containing chlorine
Exhaust gas environment-friendly type resource utilization system, 1 top of insulation incinerator are disposed with cell burner 21, the combination gas
Exhaust gas burner 22 is installed, auxiliary fuel is delivered directly to cell burner 21 in burner 21.It is arranged after the insulation incinerator 1
Closed good horizontal smoke tube exhaust-heat boiler 2 under high temperature is equipped with drum 10 above the horizontal smoke tube exhaust-heat boiler 2, horizontal
Smoke tube exhaust-heat boiler 2 and drum 10 form natural convection loop, and the drum 10 is connect with gas-distributing cylinder 11, the softened water of addition according to
It is secondary to enter drum 10 after thermal deaerator 9, boiler feed pump 15；Stone is arranged after the horizontal smoke tube exhaust-heat boiler 2
Black chilling tower 3, the graphite chilling tower 3 are sequentially connected chilling tower circulating pump 16 and graphite heat exchanger 12, the graphite heat exchanger
12 are mounted on 3 lower part of graphite chilling tower, and 3 upper half of graphite chilling tower is socketed with a circle collet；The cloth after the graphite chilling tower 3
The absorption tower level-one HCl 4 is set, 4 top of the absorption tower HCl is equipped with desalination (operating) water nozzle, and one layer of bubble-cap is arranged at desalination (operating) water nozzle lower part
23, packing layer 24 is set in the middle part of the absorption tower HCl 4；Depickling packed tower 5, depickling filler are arranged behind the absorption tower HCl 4
The top of tower 5 is equipped with lye nozzle, and one layer of demister is additionally provided with below nozzle, is arranged three layers from top to bottom below and fills out
The bed of material；Arrange that flue gas reheater 6, the left side connection flue gas of the flue gas reheater 6 add again after the depickling packed tower 5
Heat combustor 28, auxiliary fuel and combustion air reheat in burner 28 through pipeline to flue gas；Add again in the flue gas
Flue after hot device 6 is disposed with ammonia nozzle, and ammonia-spraying grid 29, the ammonia-spraying grid are arranged in the subsequent flue of ammonia nozzle
SCR denitration device 7 is arranged after 29, and low-temperature denitration catalyst 27 is housed in the out of stock device 7 of SCR；After SCR denitration device 7
It arranges chimney 8, air-introduced machine 19 is installed between SCR denitration device 7 and chimney 8.
Fig. 2 is the workflow schematic diagram of the utility model, and it is practical new to further describe this below in conjunction with the flow chart
The embodiment of type, a kind of environment-friendly type resource utilization system of organic exhaust gas containing chlorine, in insulation 1 top arrangement combinations formula of incinerator combustion
Burner 21, auxiliary fuel are transported to cell burner 21, and combustion air is transported to cell burner 21 by combustion fan 14,
Clean organic exhaust gas containing chlorine is transported to exhaust gas burner 22 by booster fan 13, and auxiliary fuel sustained combustion in air makes to burn
In-furnace temperature is not less than 1200 DEG C, and at this temperature, the chlorinated organics in exhaust gas are reacted with oxygen occurs oxygenolysis, raw
At CO2、H2O、NOX, HCl and a small amount of free state Cl2.In addition, insulation incinerator 1 is poured to fiery wing furnace wall using High-Alumina fire resisting
Material feeding pours, and does not react with the HCl in flue gas.
High-temperature flue gas enters horizontal smoke tube exhaust-heat boiler 2 from the outlet of insulation incinerator 1, changes in waste heat boiler with boiler water
Heat.Softened water enters thermal deaerator 9 on other direction, and it is 104 DEG C that temperature, which increases, after low-pressure steam deoxygenation, by pot
Furnace feed pump is transported to drum 10, and drum 10 and waste heat boiler ontology form circulation loop, exchange heat with high-temperature flue gas, generates saturation
Steam.Saturated vapor enters gas-distributing cylinder 11, is set on gas-distributing cylinder 11 there are two steam outlet pipe road, one of them and thermal deaerator 9
Connection, another connect with external gas utilization unit.
Flue gas from horizontal smoke tube exhaust-heat boiler 2 come out after temperature be 550 DEG C, subsequently into graphite chilling tower 3, flue gas exists
With the circulation acid solution contact heat-exchanging of penetrating in graphite chilling tower 3, flue-gas temperature is reduced to 60 by 550 DEG C in a very short period of time
DEG C, and absorb HCl.The heat of flue gas takes away a part, recycle acid by the recirculated cooling water in the collet on 3 top of graphite chilling tower
Liquid successively after over-quenching tower circulating pump 16, graphite heat exchanger 12 cool down, sprays into graphite chilling tower 3 again and recycles, recycle acid solution
Heat absorbed and taken away by recirculated cooling water in graphite heat exchanger 12.
The flue-gas temperature come out from graphite chilling tower 3 is 60 DEG C, subsequently into the absorption tower HCl 4.It is arranged in the absorption tower HCl 4
Packing layer 24, the acid solution of 4 lower part of the absorption tower HCl are sent to 24 top of packing layer by absorption tower circulating pump 17 and spray into, and flue gas is in filler
It goes in the same direction, comes into full contact with recycle acid liquid in layer 24, further absorb the HCl in flue gas.Recycle acid in graphite chilling tower 3
After the timing measured value of liquid reaches 20% concentration, the circulation acid solution of chilling tower bottom is discharged to battery limit (BL) Wai Chu from acid discharge valve 30
Reason, then adds to 3 lower part of graphite chilling tower by the acid solution of 4 lower part of the absorption tower HCl, while fresh desalted water adds to HCl
On 4 top bubble-cap 23 of absorption tower, packing layer 24 is fallen into after being uniformly distributed by bubble-cap 23.
Flue gas enters depickling packed tower 5 after coming out from the absorption tower HCl 4, and the NaOH solution of 5 bottom of depickling packed tower is by depickling
Tower circulating pump 17 is transported to the sprinkling of 26 top of extracting tower packing layer, arranges three layers of extracting tower packing layer 26 altogether in depickling packed tower 5,
Guarantee that flue gas comes into full contact with circulation alkali liquor, by the HCl and Cl in flue gas2It neutralizes.After recycling a period of time, lye gradually becomes
At neutral brine, absorption efficiency is substantially reduced, and neutral brine is discharged the bottom valve for opening depickling packed tower 5 at this time, again
New NaOH solution is added to continue cycling through.The flue gas come out from depickling packed tower 5 carries many moisture, in depickling packed tower 5
One layer of demister 25 of top layout, for removing the larger drop carried in flue gas.
Flue gas enters flue gas reheater 6, auxiliary fuel and combustion air after coming out from depickling packed tower 5 defeated by pipeline
It is sent in flue gas reheater burner 28 and burns, the temperature of flue gas is heated to 220 DEG C from 60 DEG C.
From flue gas reheater 6 come out after flue gas by pipeline introducing SCR denitration device 7, SCR denitration device 7 it
Preceding flue arrangement ammonia nozzle is disposed with ammonia-spraying grid 29 to be sufficiently mixed flue gas and ammonia after ammonia nozzle.Mixing
Flue gas afterwards enters SCR denitration device 7, under the action of low-temperature denitration catalyst 27, by the NO in flue gasXIt is reduced into N2With
H2O。
HCl, Cl from the flue gas that SCR denitration device 7 emits2、NOXEtc. the concentration of atmosphere pollutions be all satisfied state
The requirement of family's standard is sent into chimney 8 after drawing finally by air-introduced machine 19 and is discharged into atmosphere.
The utility model has not only carried out innoxious, minimizing to organic exhaust gas containing chlorine, utilization of waste as resource is handled,
And recycled it and burned the thermal energy generated, the hydrochloric acid of 20% concentration of recycling can be used as industrial goods use, realize organic containing chlorine
Environmental protection, energy conservation and the utilization of resources requirement of exhaust gas, had not only saved the energy but also had protected atmospheric environment.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (10)
1. a kind of environment-friendly type resource utilization system of organic exhaust gas containing chlorine includes insulation incinerator (1), horizontal smoke tube exhaust-heat boiler
(2), graphite chilling tower (3), the absorption tower HCl (4), depickling packed tower (5), flue gas reheater (6), SCR denitration device (7),
Chimney (8), it is characterised in that: the insulation incinerator (1) is arranged horizontal smoke tube exhaust-heat boiler (2) afterwards, and selects high temperature item
Closed good horizontal smoke tube exhaust-heat boiler (2) under part, horizontal smoke tube exhaust-heat boiler (2) top are connected with drum (10)；
Graphite chilling tower (3) is arranged afterwards in the horizontal smoke tube exhaust-heat boiler (2), and the graphite chilling tower (3) is sequentially connected chilling tower
Circulating pump (16) and graphite heat exchanger (12), the graphite heat exchanger (12) are mounted on graphite chilling tower (3) lower part, graphite chilling
A circle collet is socketed with outside tower (3) upper inside wall；The absorption tower level-one HCl (4) is arranged afterwards in the graphite chilling tower (3), it is described
The absorption tower HCl (4) top inner wall is equipped with desalination (operating) water nozzle, and desalination (operating) water nozzle lower part is equipped with one layer of bubble-cap (23), and the HCl inhales
It receives and packing layer is set in the middle part of tower (4)；Depickling packed tower (5), the top of depickling packed tower (5) are arranged afterwards in the absorption tower HCl (4)
End is equipped with lye nozzle, and one layer of demister is also set up below nozzle, three layers of filler are arranged from top to bottom below demister
Layer；Flue gas reheater (6) is arranged afterwards in the depickling packed tower (5), and the left side of the flue gas reheater (6) connects flue gas
It reheats burner (28), auxiliary fuel and combustion air reheat in burner (28) through pipeline to flue gas；Described
Flue after flue gas reheater (6) is disposed with two rows of ammonia spray orifices, installs ammonia-spraying grid in the subsequent flue of ammonia spray orifice
(29), SCR denitration device (7) is arranged afterwards in the ammonia-spraying grid (29), have suitable low temperature in the SCR denitration device (7)
Denitrating catalyst；Chimney (8) is arranged afterwards in SCR denitration device (7), and air-introduced machine (19) are installed on flue between the two.
2. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 1, it is characterised in that: described
Insulation incinerator (1) top is disposed with cell burner (21), and exhaust gas burner is installed in the cell burner (21)
(22), auxiliary fuel is delivered directly to cell burner (21).
3. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 1, it is characterised in that: described
Insulation incinerator (1) furnace wall using resistance to HCl corrosion high alumina refractory casting material pour.
4. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 1, it is characterised in that: horizontal
Smoke tube exhaust-heat boiler (2) and drum (10) form natural convection loop, are connected with gas-distributing cylinder (11) on the outside of drum (10), outside system
The softened water of injection successively enters drum (10) after thermal deaerator (9), boiler feed pump (15).
5. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 4, it is characterised in that: described
Steam outlet pipe road there are two setting on gas-distributing cylinder (11), one of them connect with thermal deaerator (9), another is set with outside with vapour
Standby connection.
6. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 4, it is characterised in that: described
Thermal deaerator (9) can carry out low-pressure steam deoxygenation to softened water.
7. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 1, it is characterised in that: graphite
The acid solution of chilling tower (3) lower part, which is successively atomized through over-quenching tower circulating pump (16), graphite heat exchanger (12) and chilling tower top, sprays
Rifle returns to graphite chilling tower (3) lower part, forms circulation loop；The graphite heat exchanger (12) is mounted under graphite chilling tower (3)
Portion；The lower part of graphite chilling tower (3) is equipped with acid discharge valve.
8. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 1, it is characterised in that: HCl
The installation site on absorption tower (4) is higher than graphite chilling tower (3), and the acid solution of the absorption tower HCl (4) lower part is by absorption tower circulating pump
(17) the acid solution nozzle for being sent to the absorption tower HCl (4) top sprays into, and acid solution is internal from up to down by filler in the absorption tower HCl (4)
Absorption tower lower part is fallen into after layer (24), forms closed loop.
9. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 1, it is characterised in that: described
Acid discharge pipeline is connected between the absorption tower HCl (4) and graphite chilling tower (3), and the absorption tower HCl (4) top is equipped with desalination
(operating) water nozzle.
10. one kind environment-friendly type resource utilization system of organic exhaust gas containing chlorine according to claim 1, it is characterised in that: institute
The suitable reaction temperature for stating low-temperature denitration catalyst (27) is 220 DEG C or so.
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| CN110793044A (en) * | 2019-10-16 | 2020-02-14 | 北京航化节能环保技术有限公司 | Incineration device and method for treating sulfur recovery tail gas |
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